NIST Technical Note 1807

Horizontal Convective Boiling of R134a, 

R1234yf/R134a, and R1234ze(E) within a 

Micro-Fin Tube with Extensive 

Measurement and Analysis Details

Mark A. Kedzierski

Ki-Jung Park 
NIST Technical Note 1807 

Horizontal Convective Boiling of R134a, 

R1234yf/R134a, and R1234ze(E) within a 

Micro-Fin Tube with Extensive 

Measurement and Analysis Details

Mark A. Kedzierski

Ki-Jung Park

Energy and Environment Division

Engineering Laboratory

August 2013

U.S. Department of Commerce 

Penny Pritzker, Secretary

National Institute of Standards and Technology 

Patrick D. Gallagher, Under Secretary of Commerce for Standards and Technology and Director 
Certain commercial entities, equipment, or materials may be identified in this

document in order to describe an experimental procedure or concept adequately.

Such identification is not intended to imply recommendation or endorsement by the

National Institute of Standards and Technology, nor is it intended to imply that the

entities, materials, or equipment are necessarily the best available for the purpose. 

National Institute of Standards and Technology Technical Note 1807

Natl. Inst. Stand. Technol. Tech. Note 1807, 54 pages (August 2013) 

CODEN: NTNOEF
iii

Horizontal Convective Boiling of R134a, R1234yf/R134a, and R1234ze(E)

within a Micro-Fin Tube with Extensive Measurement and Analysis Details

M. A. Kedzierski

National Institute of Standards and Technology

Gaithersburg, MD 20899

K-J. Park

Korea Atomic Energy Research Institute

989-111 Daedeok-daero, Yuseong-gu, Daejeon, 305-353, Korea

ABSTRACT

This report presents local convective boiling measurements in a micro-fin tube for R134a and two low

global warming potential (GWP ) refrigerants: R1234yf/ R134a, 56/44 % mass and R1234ze(E). Water 

heating either in counterflow or in parallel flow with the test refrigerant was used to vary the heat flux for a 

given quality. The heat transfer coefficient of the three test fluids were compared at the same heat flux, 

saturated refrigerant temperature, and refrigerant mass flux using an existing correlation from the literature. 

The resulting comparison showed that refrigerant R134a exhibited the highest heat transfer performance in 

large part due to its higher thermal conductivity as compared to the tested low-GWP refrigerants. For the 

example case presented here, the heat transfer coefficient for R1234yf/ R134a (56/44) remains within 5 % 

of the heat transfer coefficient for R134a, having essentially identical performance for qualities less than 

30 %. Similarly, the heat transfer coefficient for R1234ze(E) is essentially the same as that for R134a; 

however, it is roughly 700 kW·K-1

·m-2 less than that of R134a for qualities less than 30 %. The smaller 

heat transfer coefficient of R1234ze(E) as compared to that of R134a is primarily due to the 11 % smaller 

thermal conductivity and the 21 % smaller reduced pressure as compared to R134a at this test temperature. 

The measurements are important as part of the evaluation of low-GWP replacement refrigerants for R134a

in unitary refrigeration and air-conditioning equipment. 

Keywords: boiling, enhanced heat transfer, low-GWP, micro-fin, refrigerant mixtures 
iv

TABLE OF CONTENTS

ABSTRACT.............................................................................................................................................III

TABLE OF CONTENTS .......................................................................................................................IV

LIST OF TABLES................................................................................................................................... V

INTRODUCTION..................................................................................................................................... 1

EXPERIMENTAL APPARATUS........................................................................................................... 2

MEASUREMENTS .................................................................................................................................. 3

RESULTS .................................................................................................................................................. 5

CONCLUSIONS ....................................................................................................................................... 7

ACKNOWLEDGEMENTS ..................................................................................................................... 8

NOMENCLATURE.................................................................................................................................. 9

APPENDIX A2........................................................................................................................................ 32

APPENDIX B1 ........................................................................................................................................ 40

APPENDIX B2 ........................................................................................................................................ 43

APPENDIX B3 ........................................................................................................................................ 48
v

LIST OF TABLES

Table 1 median estimated 95 % relative expanded uncertainties for measurements ..................... 13

Table 2 measured saturated temperature and saturated pressure of r1234yf/ r134a (56/44)........ 14
vi

LIST OF FIGURES

Fig. 1 schematic of test rig..................................................................................................................... 15

Fig. 2 Test section cross section ............................................................................................................ 16

Fig. 3 Detailed schematic of test section............................................................................................... 17

Fig. 4 Relative uncertainty of inner wall temperature ....................................................................... 18

Fig. 5 Counterflow temperature profiles for a R1234yf/ R134a (56/44) test.................................... 19

Fig. 6 Relative uncertainty of water temperature gradient with respect to quality ........................ 20

Fig. 7 Heat Flux distribution for R134a............................................................................................... 21

Fig. 8 Relative uncertainty of the Nusselt number with respect to the quality ................................ 22

Fig. 9 Comparison between measured Nusselt numbers and those predicted by the Hamilton et al. 

(2008) correlation.................................................................................................................................... 23

Fig. 10 Flow boiling heat transfer coefficient for micro-fin tube versus thermodynamic quality for 

R134a........................................................................................................................................................ 24

Fig. 11 Flow boiling heat transfer coefficient for micro-fin tube versus thermodynamic quality for 

R1234yf/ R134a (56/44)........................................................................................................................... 25

Fig. 12 Flow boiling heat transfer coefficient for micro-fin tube versus thermodynamic quality for

R1234ze(E)............................................................................................................................................... 26

Fig. 13 Flow boiling heat transfer coefficient for micro-fin tube versus thermodynamic quality for 

R1234ze(E)............................................................................................................................................... 27

Fig. 14 Flow boiling Nusselt numbers versus thermodynamic quality for test refrigerants........... 28
1

INTRODUCTION

Internally enhanced tubes, like the micro-fin tube, are used by most manufacturers in the construction of 

evaporators and condensers for new unitary refrigeration and air-conditioning equipment. The reason for

the micro-fin tube’s hold on unitary equipment is that it provides the highest heat transfer with the lowest 

pressure drop of the commercially available internal enhancements (Webb and Kim, 2005). Most of the 

experimental measurements for evaporative heat transfer coefficients in the micro-fin tube have been done 

for traditional refrigerants like R134a. Pressure from the policies set by the Montreal Protocol (1987), the 

Kyoto Protocol (1997) and the European Mobile Directive (2006) have caused a recent shift to 

refrigerants with both zero ozone depletion potential (ODP) and low global warming potential (GWP). 

Johnson et al. (2012) reports that azeotropic R1234yf/ R134a (56/44) (i.e., XP10) 1 and R1234ze(E) are 

among the low-GWP refrigerants identified for evaluation by the Air-Conditioning, Heating, and 

Refrigeration Institute (AHRI) Low-GWP Alternative Refrigerants Evaluation Program as potential

replacement refrigerants for R134a. The reason for this is that both R1234yf/ R134a (56/44) and 

R1234ze(E) have zero ODP and 100 year GWPs of approximately 600 and 6, respectively (Hickman, 2012

and Bitzer, 2012). Consequently, flow boiling heat transfer data for the micro-fin tube with R1234yf/ 

R134a (56/44) and R1234ze(E) are essential for the evaluation of their use for unitary applications.

Much of the relatively recent research on flow boiling in micro-fin tubes has been for traditional 

refrigerants. For example, Targanski and Cieslinski (2007) measured the evaporation heat transfer 

characteristics of R407C inside a micro-fin tube in the presence of oil. Zhang et al. (2007) measured 

the evaporation heat transfer coefficients of R417A and R22 inside a micro-fin tube and introduced a

new heat transfer correlation to predict their values. Yun et al. (2002) examined existing experimental 

data and developed a model, which was validated for use with R22, R113, R123, R134a, and R410A and 

a variety of micro-fin tube geometries. Seo et al. (2000), Yu et al. (2002), and Kim et al. (2002) 

measured the flow boiling heat transfer coefficient in micro-fin tubes for R22, R134a, and R410A, 

respectively. Wellsandt and Vamling (2005) have investigated in-tube evaporation of R134a in a 

special type of micro-fin tube where the fin rifling, instead of being continuous, is arranged into Vgrooves that resemble herringbones; hence, it is called the herringbone micro-fin tube. Oliver et al. 

(2004) have also studied the two-phase heat transfer performance of a herringbone and a standard 18-

deg helical micro-fin tube with R22, R134a and R407C.

Because of the relatively recent introduction of R1234yf/ R134a (56/44) and R1234ze(E), measured heat 

transfer data in a micro-fin tube are not available in the literature for these refrigerants. The flow boiling 

measurements that presently exist for R1234ze(E), like those of Grauso et al. (2013) and Hossain et al. 

(2013), are for horizontal smooth tubes. One of the few recent works with R1234ze(E) in micro-fin tubes 

was by Koyama et al. (2011); however, this was a condensation study. Presently, there are no flow boiling 

measurements for R1234yf/ R134a (56/44) in a micro-fin tube. Consequently, the present study provides 

measured local flow boiling heat transfer for two low-GWP refrigerants (R1234yf/ R134a (56/44), and 

R1234ze(E)) and R134a in a micro-fin tube. 

 1

Certain trade names and company products are mentioned in the text or identified in an illustration in order to adequately specify the experimental 

procedure and equipment used. In no case does such an identification imply recommendation or endorsement by the National Institute of Standards and 

Technology, nor does it imply that the products are necessarily the best available for the purpose.
2

EXPERIMENTAL APPARATUS

Figure 1 shows a sketch of the experimental apparatus used to establish and measure the convective boiling.

The experimental test facility consisted of two main systems: the refrigerant loop and water loop. The 

refrigerant flow rate, pressure, and superheat were fixed at the inlet to the test section. The water flow rate 

and the inlet temperature were fixed to establish the overall refrigerant quality change in the test section. 

The water temperature drop, the tube wall temperature, the refrigerant temperatures, pressures, and pressure 

drops were measured at several axial locations along the test section. These measurements were used to 

calculate the local heat-transfer coefficient for the micro-fin tube. 

The test section consisted of a pair of 3.34 m long, horizontal tubes connected by a U-bend. A fixed test 

pressure was maintained by balancing the refrigerant duty between the subcooler, the test section, and the 

evaporator. A magnetically coupled gear pump delivered the test refrigerant to the entrance of the test 

section with a few degrees of vapor superheat. Another magnetically coupled gear pump supplied a steady 

flow of water to the annulus of the test section. The inlet temperature of the water loop was held constant 

for each test with a water chilled heat exchanger and variable electric heaters. The refrigerant and water 

flow rates were controlled by varying the pump speeds using frequency inverters. Redundant flow rate 

measurements were made with Coriolis flowmeters and with turbine flowmeters for both the refrigerant and 

water sides.

Figure 2 shows a cross section of the test section with a detail of the micro-fin tube geometry. The test 

refrigerant flowed inside a micro-fin tube, while distilled water flowed either in parallel flow or counterflow 

to the refrigerant in the annulus that surrounded the micro-fin tube. Having some test in parallel flow and 

others in counterflow produced a broad range of heat fluxes at both low and high flow qualities. The 

annulus gap was 2.2 mm, and the micro-fin tube wall thickness was 0.3 mm. The micro fin tube had 60, 0.2 

mm high fins with 18 degree helix angle. For this geometry, the cross sectional flow area was 60.8 mm2

giving an equivalent smooth diameter (De) of 8.8 mm. The root diameter of the micro-fin tube was 8.91 

mm. The inside-surface area per unit length of the tube was estimated to be 44.6 mm. The hydraulic 

diameter (Dh) was measured with a polar planimeter from a scaled drawing of the tube cross section and 

determined to be approximately 5.45 mm. The ratio of the inner surface area of the micro fin tube to the 

surface area of a smooth tube of the same De was 1.6. The fins rifled down the axis of the tube at a helix 

angle of 18° with respect to the tube axis.

Figure 3 provides a detailed description of the test section. The annulus was constructed by connecting a 

series of tubes with 14 pairs of stainless steel flanges. This construction permitted the measurement of both 

the outer micro-fin wall temperature and the water temperature drop as discussed in the following two 

paragraphs. The design also avoided abrupt discontinuities such as unheated portions of the test section and 

tube-wall "fins" between thermopile ends. 

Figure 3 shows that thermocouple wires pass between 12 of the gasketed flange pairs to measure the 

refrigerant-tube wall temperature at ten locations on the top, side, and bottom of the tube wall. These 

locations were separated by 0.6 m on average, and they were located near the intersection of the shell 

flanges. In addition to these, thermocouples were also mounted next to the pressure taps near the middle of 

each test section length. The thermocouple junction was soldered to the outside surface and was sanded to a 

thickness of 0.5 mm. The leads were strapped to a thin non-electrically-conducting epoxy layer on the wall 

for a distance of 14.3 mm before they passed between a pair of the shell flanges. The wall temperature was 

corrected for a heat flux dependent fin effect. The correction was typically 0.05 K. Figure 3 also shows 
3

that a chain of thermopiles was used to measure the water temperature drop between each flange location. 

Each thermopile consisted of ten thermocouples in series, with the ten junctions at each end evenly spaced 

around the circumference of the annulus. Because the upstream junctions of one thermopile and the 

downstream junctions of another enter the annulus at the same axial location (except at the water inlet and 

outlet), the junctions of the adjacent piles were alternated around the circumference. A series of Teflon 

half-rings attached to the inner refrigerant tube centered the tube in the annulus. The half-rings were 

circumferentially baffled to mix the water flow. Mixing was further ensured by a high water Reynolds 

number (Kattan et al. 1995). 

As shown in Fig. 3, six refrigerant pressure taps along the test section allowed the measurement of the 

upstream absolute pressure and five pressure drops along the test section. Two sets of two water pressure 

taps were used to measure the water pressure drop along each tube. Also, a sheathed thermocouple 

measured the refrigerant temperature at each end of the two refrigerant tubes, with the junction of each 

centered radially. Only the thermocouple at the inlet of the first tube was used in the calculations. The 

entire test section was wrapped with 5 cm of foam insulation to minimize heat transfer between the water 

and the ambient. 

MEASUREMENTS

Table 1 shows the expanded measurement uncertainty (U) of the various measurements along with the 

range of each parameter in this study. The U was estimated with the law of propagation of uncertainty. All 

expanded measurement uncertainties are reported at the 95 % confidence level. The estimates shown in 

Table 1 are median values of U for the correlated data. Saturated refrigerant properties were evaluated at 

the measured saturation pressure with the REFPROP (Lemmon et al. 2010) equation of state, with the 

exception of the saturated temperature (Ts) and pressure (Ps) of R1234yf/ R134a (56/44), which was 

directly measured with a constant volume vessel, a temperature bath, a glass-rod standard platinum 

resistance thermometer (SPRT), and a pressure transducer. The measured temperature and pressure for 

R1234yf/ R134a (56/44) is presented in Table 2 and correlated below as:

( ) s 2 4 6

s s

1

0.00571 3.25 10 ln 5.30 10 ln

T

P P − − = −× −×

(1)

The uncertainty in the temperature measurement was less than ± 0.01 K while the uncertainty in the 

pressure measurement was within ±1 kPa.

The convective boiling heat transfer coefficient based on the actual inner surface area (h2φ) was calculated 

as:

2

w s

q h

T T φ

′′ = − (2)

where the measured wall temperatures (Tw) were fitted to their axial position to reduce the uncertainty in the 

measurement. 

Figure 4 shows the estimated expanded uncertainty of the wall temperature fit for all the measurements as a 

function of thermodynamic quality. Figure 4 includes some data that was omitted from the correlation as 
4

explained in the Results Section. The uncertainty of roughly 90 % of the fitted wall temperatures was less 

than 0.5 K at the 95 % confidence level. The median of the uncertainty in Tw as shown in Table 1 was

approximately 0.3 K. 

The water temperature (Tf) was determined from the measured temperature change obtained from each 

thermopile and the inlet water temperature measurement. The water temperature gradient (dTf/dz) was 

calculated with second-order finite difference equations using the measured water temperatures and their 

locations along the tube length z. The water temperature gradients were then fitted with a quadratic 

polynomial with respect to the tube length. As a check on the water temperature gradient calculation, 

Fig. 5 shows that the measured water temperatures (open circles) typically agreed with the integrated 

quadratic fit of the water temperature gradient (solid line) to within 0.2 K. 

The fitted, local, axial water temperature gradient (dTf/dz), the measured water mass flow rate (mf  ), and the 

properties of the water were used to calculate the local heat flux (q") to the micro-fin tube based on the 

actual inner surface area: 

f

f ff

p f

d d

d d

mTP

qcv

pzz

  ′′ =   +  

 (3)

where p is the wetted perimeter of the inside of the micro-fin tube. The specific heat (cpf) and the specific

volume (νf) of the water were calculated locally as a function of the water temperature. The water pressure 

gradient (dPf/dz) was linearly interpolated between the pressure taps to the location of the wall 

thermocouples. The pressure gradient term was typically less than 3 % of the temperature gradient term. 

Figure 6 plots the relative uncertainty of the heat flux measurement versus thermodynamic quality. As 

shown in Fig. 6, the uncertainty of the heat flux remains less than 3 % of the measured value, while the 

average uncertainty is approximately 1.5 % of the measured value. 

Figure 7 shows example plots of the local heat flux as calculated from eq. (3) versus thermodynamic quality

for both cases when the water and the refrigerant are in counterflow and parallel flow, respectively. Both

heat flux profiles are for R134a at an all-liquid Reynolds number (Re) of roughly 7000 and a refrigerant

reduced pressure of approximately 0.11. The discontinuity exhibited in the heat flux profiles is due to the 

change in refrigerant saturation temperature as caused by the adiabatic pressure drop in the bend that is used 

to transition from the first leg of the test section to the second leg. The decrease in the refrigerant saturation 

temperature causes an increase in the difference between the water and the refrigerant temperature, which 

leads to an increase in the local heat flux. For the counterflow case, the heat flux increases from 

approximately 3 kWm-2 at a quality near 0 to approximately 29 kWm-2 at a quality slightly greater than 0.8.

The parallel flow case is nearly the mirror image of that for counterflow where the heat flux decreases from 

approximately 30 kWm-2 at a quality near 0.06 to approximately 3 kWm-2 at a quality slightly greater than 

0.85.

The thermodynamic and transport properties were calculated with version 9.0 of REFPROP (Lemmon et al. 

2010) while using enthalpy and pressure as inputs. The enthalpy of the refrigerant vapor at the inlet of the 

test section was calculated from its measured temperature and pressure. The subsequent drop in refrigerant 

enthalpy along the test section was calculated from the local heat flux and the measured refrigerant mass 

flow rate. The refrigerant pressures were measured at six pressure taps along the test section. The pressure 

was linearly interpolated between the taps. The average refrigerant temperature was varied between 1 °C 
5

and 3 °C with approximately 5 K of subcooling at the test section inlet. The open squares in Fig. 5 show 

the measured refrigerant temperature for an example test run with R1234yf/ R134a (56/44). 

The local Nusselt number (Nu) was calculated using the hydraulic diameter and the heat transfer coefficient 

based on the actual inner surface area of the tube as:

u

2 h

l

h D

 = 

k

φ Ν (4)

Figure 8 shows the relative uncertainty of the Nu versus thermodynamic quality was between roughly 10 % 

and 25 %. Measurements of Nu with uncertainties greater than 25 % were discarded. The average 

uncertainty of Nu for presented data was approximately 18 % for all qualities. 

RESULTS

The 451 data points generated in this study for R134a, R1234yf/ R134a (56/44), and R1234ze(E) are 

tabulated in Appendix A, which contains the Nusselt and all-liquid Reynolds numbers and other reduced 

data that are typically used to characterize flow boiling. Appendix B contains the raw data measurements 

including the heat flux and the wall and water temperatures and locations. The column entitled, “flow,”

provides a “C” or a “P” to indicate that the measurements were made for either counterflow or parallel flow 

between the refrigerant and water, respectively. All the parameters given in Appendix A and B are defined 

in the Nomenclature. 

The measured local convective boiling Nusselt numbers (Nu) were compared to the pure-refrigerant (single 

component) version of the Hamilton et al. (2008) correlation:

2

1 4 3 5

C

0.3 C C s s C C

10 w

c c

Nu 482.18Re Pr Bo ( log ) P P M

P P

  =   −

 

(5)

where 

1 0.51 C x = q

2

2 5.57 5.21 C xx = −q q

2

3 0.54 1.56 1.42 C xx =− +q q

2

4 0.81 12.56 11.00 C xx =− + −

q q

2

5 0.25 0.035 C x = − q

Here, the all-liquid Reynolds number (Re), the Boiling number (Bo), the liquid Prandtl number (Pr), the 

reduced pressure (Ps/Pc), and the quality (xq) are all evaluated locally at the saturation temperature. The allliquid Reynolds number and the Nusselt number are based on the hydraulic diameter (Dh). The Nusselt 

number is also based on the actual inner surface area of the tube. 

The flow map of Yu et al. (2002) for micro-fin tubes was used to determine that approximately 87 % of the 

measurements were in annular or semi-annular flow. Manwell and Bergles (1990) suggest that the reason 

annular-like flow is a strong characteristic of micro-fin tubes is that the spiraling fins along the tube axis 
6

encourage wetting of the upper tube wall.

Figure 9 shows a comparison between the boiling Nusselt numbers predicted with eq. (5) for the micro-fin 

tube to those measured here for R134a, R1234yf/ R134a (56/44) and R1234ze(E). Equation (5) predicts

77 % of the measured convective boiling Nusselt numbers for R134a, R1234yf/ R134a (56/44) and 

R1234ze in the micro-fin tube to within approximately ± 20 %. The measurements for each fluid are 

roughly centered about the mean of the correlation suggesting a lack of bias in the prediction due to the 

different fluids or some other cause.

Representative plots of the heat transfer coefficient (h2φ) versus thermodynamic quality (xq) are given in 

Figs. 10 through 13. The solid lines are predictions for the present micro-fin tube geometry, which were 

obtained from the Hamilton et al. (2008) correlation given in eq. (5). The symbols are the measured data 

points, while the dashed lines provide the measurement uncertainty for a 95 % confidence level. The 

uncertainty in the heat transfer coefficient is shown to be roughly 1000 WK-1⋅m-2 for most of data for 

qualities greater than 20 %. The uncertainty in the tube wall temperature is the greatest contributor to the 

uncertainty in the heat transfer coefficient.

Figure 10 shows the local heat transfer coefficient for R134a for Re = 6700 and Ps/Pc = 0.09 with 

counterflow between the refrigerant and the water. Half of the measurements are underpredicted by 

approximately 7.2 %, while the other half is overpredicted by approximately 6.2 %. Overall, the average 

difference between the measurements and the predictions is less that 1 %. The heat transfer coefficient 

increases with respect to quality, in large part, due to the increase of the local heat flux with respect to 

quality, which is a characteristic of counterflow.

Figure 11 shows the local heat transfer coefficient for R1234yf/ R134a (56/44) for Re = 5320 and 

Ps/Pc = 0.11 with counterflow between the refrigerant and the water. For qualities larger than 0.05 %, the 

measurements are predicted to within approximately 10 %. Overall, the average difference between the 

measurements and the predictions is less that 1 % for qualities larger than 0.05 %. 

Figure 12 shows the local heat transfer coefficient for R1234ze(E) for Re = 9390 and Ps/Pc = 0.08 with 

counterflow between the refrigerant and the water. Seven of the measurements are overpredicted, on 

average, by approximately 7.7 %, while the remaining four measurements are underpredicted by 

approximately an average of 12.4 %. Overall, the average difference between the measurements and the 

predictions is less that 1 %.

Figure 13 shows the local heat transfer coefficient for R1234ze(E) for Re = 4570 and Ps/Pc = 0.07, which 

presents an example of the parallel flow condition. For qualities larger than 0.05 %, half of the 

measurements are underpredicted, on average, by approximately 9.2 %, while the other half are

overpredicted by an average of approximately 7.9 %. Overall, the average difference between the 

measurements and the predictions is less that 1 %. For qualities less than 40 %, the heat transfer coefficient 

decreases with increasing quality. This is mainly caused by the decreasing heat flux with respect to quality, 

which is a characteristic of parallel flow.

Figure 14 uses the Hamilton et al. (2009) model to illustrate the relative heat transfer performance of 

R134a, R1234yf/ R134a (56/44), and R1234ze versus quality for the same saturated refrigerant temperature 

(Ts = 278 K), and the same refrigerant mass flux (Gr = 250 kg·m-2

·s-1) for the present micro-fin tube 
7

geometry. Both counterflow and parallel flow conditions are shown. Counterflow is obtained by setting 

the heat flux to q

0.72 q x ′′ = 39 kW·m-2

, while parallel flow is obtained for q x (31 32.6 q ) ′′ = − kW·m-2. The 

heat flux profiles with respect to quality that were used to calculate the heat transfer coefficient are 

approximately equivalent to those shown in Fig. 7. Three different line styles for each flow condition are 

used to represent the predictions for the three different test fluids as labeled. 

In general for counterflow, Fig. 14 shows that the boiling heat-transfer coefficient rapidly increases with 

increasing quality for qualities less than 20 %. For quality ranges between 20 % and 70 %, the rate of 

increase in the heat transfer coefficient with respect to increasing quality is roughly a fourth of that for 

qualities less than 20 %. For the example case presented here, the heat transfer coefficient for R1234yf/ 

R134a (56/44) remains with 5 % of the heat transfer coefficient for R134a, having essentially identical 

performance for qualities less than 30 %. For qualities greater than 30 %, the heat transfer coefficient for 

R1234ze(E) is roughly 700 kW·K-1·m-2 less than that of R134a. The smaller heat transfer coefficient of 

R1234ze(E) as compared to that of R134a is primarily due to the 11 % smaller thermal conductivity and the 

21 % smaller reduced pressure as compared to R134a at this test temperature. The favorable performance 

of R134a as compared to the tow low-GWP refrigerants examined here is primarily due to the larger liquid 

thermal conductivity. 

For parallel flow, Fig. 14 shows nearly the same relative and absolute performance for qualities greater than 

20 %. However, the influence of the larger heat flux is evident for qualities less than 20 % for the parallel 

flow condition. For qualities less than 20 %, it is likely that nucleate boiling may more influential in 

determining the magnitude of the heat transfer coefficient than it is for the counterflow condition. In this 

region, the heat transfer coefficient is shown to decrease with increasing quality as the nucleate boiling 

becomes suppressed with the growing presence of annular flow. Otherwise, the heat transfer coefficient for 

parallel flow is rather constant with respect to quality varying no more that ± 11 % from its mean value over 

the illustrated quality range.

CONCLUSIONS

Local convective boiling heat transfer measurements for two low-GWP refrigerants and R134a in a fluid 

heated micro-fin tube were presented. The measured convective boiling Nusselt numbers for all of the test 

refrigerants were compared to an existing correlation from the literature. Approximately, 77 % of the 

measurements were predicted to within ± 20 % and centered about the mean prediction. 

In general, the measured boiling heat-transfer coefficient increased with increasing qualities for counterflow 

between the refrigerant and the water. In contrast, for parallel flow, the measured heat transfer coefficient 

was relatively constant. The heat transfer coefficient of the three test fluids were compared at the same heat 

flux, saturated refrigerant temperature, and refrigerant mass flux by using the correlation from the literature 

that was validated with the measurements. The resulting comparison showed that refrigerant R134a

exhibited the highest heat transfer performance in large part due to its higher thermal conductivity as 

compared to the tested low-GWP refrigerants. For the example case presented here, the heat transfer 

coefficient for R1234yf/ R134a (56/44) remains within 5 % of the heat transfer coefficient for R134a, 

having essentially identical performance for qualities less than 30 %. Similarly, the heat transfer coefficient 

for R1234ze(E) is essentially the same as that for R134a; however, it is roughly 700 kWK-1

m-2 less than 

that of R134a for qualities less than 30 %. The smaller heat transfer coefficient of R1234ze as compared to 

that of R134a is primarily due to the 11 % smaller thermal conductivity and the 21 % smaller reduced 

pressure as compared to R134a at this test temperature. 
8

ACKNOWLEDGEMENTS

This work was funded by NIST. The authors thank the following for their constructive criticism of the first 

draft of the manuscript: Dr. P. Domanski, and Dr. A. Persily from NIST, and Dr. D. Han from LACC-JNK 

Inc. Thanks also go to Wolverine Tube, Inc., for supplying the Turbo-A, micro-fin tube for the test section, 

and to Dupont and Honeywell for supply the R1234yf/ R134a (56/44), and R1234ze(E) test refrigerants, 

respectively. 
9

NOMENCLATURE

English symbols

Ac cross-sectional area

Bo local boiling number, "

r fg

q

G i

cp specific heat (J/kg·K)

C coefficients given in eq. (5)

De equivalent inner diameter of smooth tube, 4Ac

π

(m)

Dh hydraulic diameter of micro-fin tube (m)

e fin height (mm)

G total mass velocity (kg/m2·s)

h2φ local two-phase heat-transfer coefficient (W/m2

⋅K)

ifg latent heat of vaporization (J/kg)

k refrigerant thermal conductivity (W/m⋅K)

Nu local Nusselt number based on Dh

m mass flow rate (kg/s)

Mw molar mass (g/mole)

p wetted perimeter (m)

P local fluid pressure (Pa)

Pr liquid refrigerant Prandtl number 

,

p

r l

c

k

μ

q" local heat flux based on Ai (W/m2) 

Re all liquid, refrigerant Reynolds number based on Dh= r h

r,l

G D

μ

Sv non-dimensional refrigerant specific volume given in Appendix: ν ν v l

ν

−

s distance between fins (mm)

T temperature (K)

tb bottom thickness of fin (mm)

tw tube wall thickness (mm)

U expanded relative uncertainty

xq thermodynamic mass quality

z axial distance (m)

Greek symbols

α helix angle (°)

β fin angle (°)

∆Ts Ts - Tw (K)

μ viscosity (Pa·s)

ν specific volume, xqνv + (1-xq)νl (m3/kg)
10

Subscripts

c critical condition

f water

l liquid

p prediction

r refrigerant

s saturated state

v vapor

w heat transfer surface
11

REFERENCES

Bitzer Kuhlmaschinenbau GmbH, 2012, “Refrigerant report 17”

European Mobile Directive, 2006, “Directive 2006/40/EC of The European Parliament & of the Council of 

17 May 2006 Relating to Emissions from Air-Conditioning Systems in Motor Vehicles & Amending 

Council Directive 70/156/EC,” Official Journal of the European Union, Vol. 49, No. L 161, pp.12-18.

Grauso, S., Mastrullo, R., Mauro, A. W., Thome, J.R., and Vanoli, G. P., 2013, “Flow Pattern Map, Heat 

Transfer and Pressure Drops During Evaporation of R1234ze(E) and R134a in a Horizontal, Circular 

Smooth Tube: Experiments and Assessment of Predictive Methods,” International Journal of Refrigeration, 

Vol. 36, pp. 478-491.

Hamilton, L. J., Kedzierski, M. A, and Kaul, M. P., 2008, “Horizontal Convective Boiling of Pure and 

Mixed Refrigerants within a Micro-Fin Tube,” Journal of Enhanced Heat Transfer, Vol. 15, No. 3, pp. 211-

226.

Hickman, K. E., 2012, “Alternatives to High GWP HFC Refrigerants: Chiller Applications,” Proceedings 

of ASHRAE/NIST Refrigerants Conference, Gaithersburg, MD, USA.

Hossain, Md. A, Onaka, Y., Afroz, H., M.M., and Miyara, A., 2013, “Heat Transfer During Evaporation of 

R1234ze(E), R32, R410A, and a Mixture of R1234ze(E) and R32 Inside a Horizontal Smooth Tube,”

International Journal of Refrigeration, Vol. 36, pp. 465-477.

Johnson, P. A., Wang, X., Amrane, K., 2012, “AHRI Low-GWP Alternative Refrigerant

Evaluation Program,” Proceedings of ASHRAE/NIST Refrigerants Conference, Gaithersburg, MD, USA.

Kattan, N., Favret, D., and Thome, J. R., 1995, "R-502 and Two Near-Azeotropic Alternatives: Part I - In 

Tube Flow-Boiling Tests," ASHRAE Trans., Vol. 101, Pt. 1, pp. 491-508. 

Kim, Y., Seo, K., and Chung, J., 2002, “Evaporation Heat Transfer Characteristics of R-410A in 7 and 9.52 

mm Smooth/Micro-Fin Tubes,” International Journal of Refrigeration, Vol. 25, pp. 716-730.

Koyama, S., Baba, D., and Nakahata, H., 2011, “Experimental Study on Heat Transfer and Pressure Drop 

Characteristics of Pure Refrigerant R1234ze(E) Condensing in a Horizontal Micro-Fin Tube,” International 

Congress of Refrigeration, Beijing Prague, Czech Republic, ID: 306.

Kyoto Protocol, 1997, “United Nations Framework Convention on Climate Change,” United Nations (UN), 

New York, NY, USA.

Lemmon, E. W., Huber, M. L., and McLinden, M. O., 2010, NIST Standard Reference Database 23, 

Version 9.0. Private Communications with McLinden, National Institute of Standards and Technology, 

Boulder, CO.

Manwell, S.P., and Bergles, A.E., 1990, “Gas-liquid flow patterns in refrigerant-oil mixtures, ASHRAE 

Transactions, Vol. 96, Part 2, p. 456-464.
12

Montreal Protocol, 1987, “Montreal Protocol on Substances that Deplete the Ozone Layer,” United Nations 

(UN), New York, NY, USA (1987 with subsequent amendments).

Olivier, J. A., Liebenberg, L., Kedzierski, M. A., and Meyer, J. P., 2004, “Pressure Drop During Refrigerant 

Condensation Inside Horizontal Smooth, Helical Micro-Fin, and Herringbone Micro-Fin Tubes,” Journal of 

Heat Transfer, Vol. 126, pp. 687-696.

Seo, K., and Kim, Y., 2000, “Evaporation Heat Transfer and Pressure Drop of R-22 in 7 and 9.52 mm 

Smooth/Micro-Fin Tubes,” International Journal of Heat and Mass Transfer, Vol. 43, pp. 2869-2882.

Targanski, W., Cieslinski, J. T., 2007, “Evaporation of R407C/Oil Mixtures Inside Corrugated and MicroFin Tubes” Applied Thermal Engineering, Vol. 27, No. 13, pp. 2226–2232.

 

Webb, R. L., and Kim, N-H., 2005, Principles of Enhanced Heat Transfer, 2nd ed., Taylor & Francis, New 

York. 

Wellsandt, S., and Vamling, L. 2005, “Evaporation of R134a in a Horizontal Herringbone Microfin 

Tube: Heat Transfer and Pressure Drop,” International Journal of Refrigeration, Vol. 28, pp. 889–900.

Yu, M., Lin, T., and Tseng, C., 2002, Heat Transfer and Flow Pattern During Two-phase Flow Boiling of 

R-134a in Horizontal Smooth and Micro-fin Tubes, International Journal of Refrigeration, Vol. 25, pp. 789-

798.

Yun, R., Kim, Y., Seo, K., and Kim, H., 2002, “A generalized correlation for evaporation heat transfer of 

refrigerants in micro-fin tubes,” International Journal of Heat and Mass Transfer, Vol. 45, pp. 2003-2010.

Zhang, X., Zhang, X., and Yuan, X., 2007, “Evaporation Heat Transfer Coefficients of R417a in Horizontal 

Smooth and Microfin Tubes,” International Congress of Refrigeration, Beijing, ICR07-B1-228.
13

Table 1 Median estimated 95 % relative expanded uncertainties for measurements (U)

Parameter Minimum Maximum U %

Gr [kg/m2·s] 100 418 2.0

Ts [K] 293.0 323.0 0.1 (0.3 K)

P [kPa] 270 450 1.5

Tw [K] 279.0 293.0 0.1 (0.25 K)

mf  [kg/s] 0.010 0.030 2.0

Tf [K] 281.0 321.0 0.1

Pf [kPa] 200 110 1.0

q" [kW/m2] 2.6 42.2 5.1

dTf/dz [K/m] 0.016 0.43 5.2

Nu 112 460 16.4

Re 2191 10800 4.0

Bo 0.000037 0.00063 16.0

Pr 3.6 4.2 2.0

Ps/Pc 0.06 0.12 2.0

xq 0.003 0.82 8.0

∆Ts [K] 1.3 7.6 15.2 (0.44 K)
14

Table 2 Measured saturated temperature and saturated pressure of R1234yf/ R134a (56/44)

Ts

(K)

Ps

(kPa)

Ts

(K)

Ps

(kPa)

Ts

(K)

Ps

(kPa)

Ts

(K)

Ps

(kPa)

Ts

(K)

Ps

(kPa)

303.05 809.3 284.44 467.8 274.76 339.9 283.74 457.5 290.03 556.4

302.55 798.8 283.93 460.4 275.08 343.7 283.73 457.5 290.33 561.4

302.06 788.5 283.44 453.2 275.41 347.5 283.74 457.5 290.62 566.4

301.56 778.0 282.94 446.0 275.73 351.4 283.74 457.5 290.91 571.4

301.06 767.6 282.44 438.9 276.05 355.2 283.74 457.5 291.20 576.4

300.58 757.1 281.93 431.8 276.37 359.0 283.73 457.5 291.50 581.5

300.09 746.6 281.43 424.8 276.69 362.9 283.74 457.5 291.79 586.7

299.59 736.3 280.92 417.9 277.01 366.8 283.73 457.5 292.09 591.8

299.10 726.2 280.42 411.1 277.32 370.8 283.74 457.5 292.37 597.0

298.61 716.1 279.90 404.1 277.63 374.7 283.73 457.5 292.66 602.2

298.12 706.2 279.39 397.4 277.94 378.5 283.73 457.5 292.96 607.5

297.63 696.6 278.88 390.8 278.25 382.6 283.73 457.6 293.25 612.8

297.14 686.8 278.36 384.0 278.57 386.6 283.74 457.6 293.54 618.1

296.66 677.2 277.84 377.3 278.89 390.6 283.73 457.5 293.83 623.4

296.18 667.9 277.82 377.1 279.19 394.6 283.73 457.5 294.13 628.9

295.68 658.3 277.14 368.7 279.50 398.6 283.73 457.6 294.42 634.3

295.19 649.0 276.26 358.0 279.81 402.6 283.73 457.6 294.71 639.8

294.71 639.9 275.73 351.6 280.11 406.8 283.83 459.0 295.00 645.2

294.22 630.7 275.19 345.2 280.42 410.9 284.14 463.3 295.29 650.7

293.73 621.9 274.65 338.9 280.73 415.0 284.44 467.8 295.58 656.3

293.25 613.1 274.11 332.6 281.02 419.0 284.74 472.2 295.88 662.0

292.76 604.2 273.55 326.4 281.33 423.3 285.03 476.6 296.18 667.8

292.27 595.6 273.00 320.2 281.64 427.5 285.33 481.0 296.47 673.4

291.79 587.0 272.45 314.1 281.94 431.7 285.62 485.5 296.76 679.0

291.29 578.3 271.88 307.8 282.24 435.9 285.92 490.1 297.05 684.8

290.81 570.0 271.31 301.8 282.54 440.1 286.22 494.7 297.35 690.7

290.33 561.7 270.74 295.8 282.84 444.4 286.51 499.2 297.64 696.6

289.83 553.3 271.13 299.6 283.14 448.8 286.80 503.8 297.93 702.5

289.35 545.1 271.15 299.8 283.44 453.1 287.10 508.4 298.22 708.3

288.86 537.1 271.44 302.9 283.74 457.4 287.39 513.1 298.52 714.3

288.37 529.0 271.76 306.4 283.74 457.4 287.69 517.8 298.81 720.3

287.88 521.1 272.11 310.1 283.74 457.4 287.98 522.5 299.11 726.4

287.39 513.3 272.45 313.7 283.74 457.5 288.27 527.2 299.40 732.4

286.90 505.5 272.79 317.5 283.74 457.5 288.57 532.0 299.69 738.6

286.41 497.9 273.12 321.2 283.74 457.5 288.86 536.9 299.99 744.4

285.92 490.3 273.45 324.9 283.74 457.5 289.16 541.7 300.29 750.3

285.42 482.6 273.78 328.7 283.74 457.5 289.45 546.5 300.58 756.5

284.93 475.3 274.11 332.4 283.74 457.5 289.74 551.4 300.87 763.0

301.47 775.8 301.17 769.2
15

Figure 1 Schematic of test rig
16

Figure 2 Test section cross section
17

Figure 3 Detailed schematic of test section
18

Figure 4 Relative uncertainty of inner wall temperature
19

Figure 5 Counterflow temperature profiles for a R1234yf/ R134a (56/44) test
20

Figure 6 Relative uncertainty of water temperature gradient with respect to quality
21

Figure 7 Heat Flux distribution for R134a
22

Figure 8 Relative uncertainty of the Nusselt number with respect to the quality
23

Figure 9 Comparison between measured Nusselt numbers and those predicted by the Hamilton et al. 

(2008) correlation
24

Figure 10 Flow boiling heat transfer coefficient for micro-fin tube versus thermodynamic quality for 

R134a
25

Figure 11 Flow boiling heat transfer coefficient for micro-fin tube versus thermodynamic quality for 

R1234yf/ R134a (56/44)
26

Figure 12 Flow boiling heat transfer coefficient for micro-fin tube versus thermodynamic quality for 

R1234ze(E) and counterflow
27

Figure 13 Flow boiling heat transfer coefficient for micro-fin tube versus thermodynamic quality for 

R1234ze(E) and parallel flow
28

Figure 14 Flow boiling Nusselt numbers versus thermodynamic quality for test refrigerants
29

APPENDIX A1

Convective Boiling of R134a within a micro-fin tube

(file: GWPNU.dat)

Nu Re xq Bo Ps/Pc Ts/Tc Mw Sv Pr flow UNu

242. 7428. 0.11 0.24014 × 10-3 0.097 0.753 102.030 8.280 3.70 P 10.7

218. 7411. 0.19 0.17939 × 10-3 0.097 0.752 102.030 4.790 3.71 P 12.2

199. 7390. 0.26 0.13515 × 10-3 0.096 0.752 102.030 3.700 3.71 P 14.1

185. 7360. 0.31 0.97960 × 10-4 0.095 0.751 102.030 3.100 3.72 P 17.2

184. 7340. 0.33 0.83840 × 10-4 0.094 0.750 102.030 2.890 3.72 P 19.7

235. 7522. 0.09 0.22350 × 10-3 0.096 0.752 102.030 9.350 3.71 P 10.7

214. 7505. 0.17 0.16773 × 10-3 0.095 0.751 102.030 5.290 3.71 P 12.4

196. 7486. 0.23 0.12687 × 10-3 0.095 0.751 102.030 4.060 3.72 P 14.3

184. 7457. 0.28 0.92180 × 10-4 0.094 0.750 102.030 3.380 3.72 P 17.6

183. 7439. 0.30 0.78780 × 10-4 0.093 0.749 102.030 3.140 3.73 P 20.3

225. 8965. 0.09 0.17543 × 10-3 0.095 0.751 102.030 9.420 3.71 P 10.6

205. 8946. 0.16 0.13211 × 10-3 0.095 0.751 102.030 5.850 3.72 P 12.3

189. 8923. 0.20 0.10013 × 10-3 0.094 0.750 102.030 4.620 3.72 P 14.3

177. 8889. 0.24 0.72620 × 10-4 0.093 0.749 102.030 3.900 3.73 P 17.7

176. 8867. 0.26 0.61760 × 10-4 0.093 0.749 102.030 3.650 3.73 P 20.4

225. 9023. 0.09 0.17280 × 10-3 0.095 0.751 102.030 10.010 3.72 P 10.6

205. 9005. 0.15 0.13025 × 10-3 0.095 0.751 102.030 6.110 3.72 P 12.3

189. 8982. 0.19 0.98760 × 10-4 0.094 0.750 102.030 4.790 3.72 P 14.3

177. 8948. 0.23 0.71540 × 10-4 0.093 0.749 102.030 4.040 3.73 P 17.8

175. 8926. 0.25 0.60730 × 10-4 0.092 0.749 102.030 3.770 3.73 P 20.5

296. 4339. 0.33 0.21852 × 10-3 0.088 0.745 102.030 2.910 3.76 C 25.0

303. 4329. 0.44 0.25595 × 10-3 0.087 0.744 102.030 2.210 3.77 C 24.6

115. 6818. 0.03 0.43790 × 10-4 0.090 0.746 102.030 24.850 3.75 C 23.9

119. 6814. 0.04 0.49460 × 10-4 0.089 0.746 102.030 19.250 3.75 C 22.2

201. 6795. 0.08 0.10547 × 10-3 0.089 0.746 102.030 10.870 3.76 C 18.4

214. 6793. 0.11 0.11917 × 10-3 0.089 0.746 102.030 8.330 3.76 C 18.0

242. 6782. 0.17 0.15290 × 10-3 0.088 0.745 102.030 5.600 3.76 C 17.2

270. 6765. 0.24 0.19596 × 10-3 0.088 0.745 102.030 4.020 3.76 C 16.5

298. 6740. 0.33 0.25232 × 10-3 0.087 0.744 102.030 2.920 3.77 C 15.7

324. 6702. 0.46 0.32798 × 10-3 0.086 0.743 102.030 2.100 3.78 C 15.0

171. 9151. 0.04 0.71990 × 10-4 0.089 0.746 102.030 17.880 3.75 C 20.0

181. 9147. 0.06 0.83020 × 10-4 0.089 0.746 102.030 13.260 3.75 C 19.5

201. 9131. 0.10 0.10774 × 10-3 0.089 0.746 102.030 8.560 3.76 C 18.8

218. 9106. 0.15 0.13739 × 10-3 0.088 0.745 102.030 5.990 3.76 C 18.5

235. 9069. 0.22 0.17474 × 10-3 0.087 0.744 102.030 4.290 3.77 C 18.4

250. 9015. 0.31 0.22355 × 10-3 0.086 0.743 102.030 3.070 3.78 C 18.4

257. 4381. 0.09 0.46554 × 10-3 0.089 0.746 102.030 9.300 3.76 P 12.7

223. 4372. 0.28 0.36102 × 10-3 0.088 0.745 102.030 3.400 3.76 P 12.6

191. 4362. 0.41 0.27756 × 10-3 0.088 0.745 102.030 2.340 3.76 P 13.0

230. 6817. 0.09 0.23034 × 10-3 0.091 0.748 102.030 9.320 3.74 P 10.7
30

215. 6802. 0.18 0.17831 × 10

-3 0.091 0.747 102.030 5.180 3.74

P 12.2

202. 6784. 0.24 0.13868 × 10

-3 0.090 0.747 102.030 3.920 3.75

P 14.2

190. 6757. 0.30 0.10279 × 10

-3 0.089 0.746 102.030 3.230 3.75

P 17.5

187. 6739. 0.32 0.87500 × 10

-4 0.089 0.745 102.030 2.990 3.76

P 19.9

222. 9152. 0.08 0.16221 × 10

-3 0.094 0.750 102.030 10.980 3.72

P 10.7

208. 9133. 0.14 0.12518 × 10

-3 0.093 0.750 102.030 6.590 3.73

P 12.4

197. 9110. 0.18 0.97090 × 10

-4 0.093 0.749 102.030 5.120 3.73

P 14.6

188. 9077. 0.22 0.71830 × 10

-4 0.092 0.748 102.030 4.270 3.74

P 18.2

188. 9055. 0.24 0.61180 × 10

-4 0.091 0.748 102.030 3.970 3.74

P 21.1

129. 5054. 0.04 0.67940 × 10

-4 0.093 0.749 102.030 17.130 3.73

C 23.9

221. 5045. 0.10 0.14340 × 10

-3 0.093 0.749 102.030 8.920 3.73

C 20.4

233. 5044. 0.14 0.16033 × 10

-3 0.092 0.749 102.030 6.670 3.73

C 19.8

260. 5038. 0.21 0.20165 × 10

-3 0.092 0.749 102.030 4.400 3.73

C 19.0

290. 5030. 0.30 0.25414 × 10

-3 0.092 0.748 102.030 3.140 3.74

C 18.5

322. 5018. 0.42 0.32266 × 10

-3 0.091 0.748 102.030 2.280 3.74

C 18.1

357. 5001. 0.59 0.41459 × 10

-3 0.090 0.747 102.030 1.650 3.75

C 17.9

119. 6794. 0.02 0.50790 × 10

-4 0.093 0.750 102.030 30.860 3.73

C 22.9

125. 6791. 0.03 0.59270 × 10

-4 0.093 0.750 102.030 21.670 3.73

C 20.9

224. 6772. 0.08 0.13725 × 10

-3 0.093 0.749 102.030 10.220 3.73

C 17.3

227. 6769. 0.12 0.14923 × 10

-3 0.093 0.749 102.030 7.490 3.73

C 16.9

249. 6757. 0.19 0.18978 × 10

-3 0.092 0.748 102.030 4.850 3.73

C 16.2

283. 6738. 0.28 0.25027 × 10

-3 0.091 0.748 102.030 3.400 3.74

C 15.6

322. 6709. 0.40 0.33586 × 10

-3 0.090 0.747 102.030 2.400 3.75

C 15.1

365. 6667. 0.58 0.45673 × 10

-3 0.089 0.746 102.030 1.670 3.76

C 14.6

112. 9330. 0.01 0.42490 × 10

-4 0.099 0.754 102.030 44.540 3.69

C 21.8

209. 9301. 0.05 0.10841 × 10

-3 0.098 0.754 102.030 15.870 3.70

C 17.2

205. 9298. 0.08 0.11666 × 10

-3 0.098 0.754 102.030 10.980 3.70

C 16.7

220. 9279. 0.13 0.14929 × 10

-3 0.098 0.753 102.030 6.750 3.70

C 16.0

248. 9247. 0.20 0.20067 × 10

-3 0.097 0.752 102.030 4.570 3.70

C 15.5

284. 9198. 0.30 0.27508 × 10

-3 0.095 0.751 102.030 3.140 3.71

C 15.3

323. 9125. 0.46 0.38152 × 10

-3 0.093 0.750 102.030 2.120 3.73

C 15.1

259. 4620. 0.00 0.43607 × 10

-3 0.089 0.746 102.030 59.260 3.75

P 11.0

243. 4614. 0.18 0.34401 × 10

-3 0.089 0.746 102.030 5.190 3.75

P 11.8

229. 4606. 0.31 0.27101 × 10

-3 0.089 0.746 102.030 3.110 3.76

P 13.1

216. 4597. 0.40 0.21417 × 10

-3 0.088 0.745 102.030 2.410 3.76

P 14.9

205. 4583. 0.49 0.16087 × 10

-3 0.088 0.745 102.030 2.000 3.76

P 18.1

256. 7096. 0.09 0.31390 × 10

-3 0.102 0.756 102.030 9.300 3.67

P 9.8

234. 7080. 0.21 0.23759 × 10

-3 0.101 0.756 102.030 4.480 3.68

P 11.0

217. 7060. 0.29 0.18124 × 10

-3 0.100 0.755 102.030 3.290 3.68

P 12.6

204. 7031. 0.36 0.13275 × 10

-3 0.099 0.754 102.030 2.670 3.69

P 15.6

205. 7012. 0.39 0.11360 × 10

-3 0.099 0.754 102.030 2.460 3.69

P 18.1

222. 9148. 0.06 0.15780 × 10

-3 0.095 0.751 102.030 13.210 3.71

P 11.0

209. 9128. 0.12 0.12208 × 10

-3 0.095 0.751 102.030 7.420 3.72

P 12.7

199. 9105. 0.16 0.95190 × 10

-4 0.094 0.750 102.030 5.630 3.72

P 15.0

194. 9071. 0.20 0.71280 × 10

-4 0.093 0.749 102.030 4.630 3.73

P 19.0

196. 9049. 0.22 0.61370 × 10

-4 0.093 0.749 102.030 4.290 3.73

P 22.1

123. 4851. 0.04 0.66210 × 10

-4 0.090 0.747 102.030 17.960 3.75

C 24.5

134. 4849. 0.06 0.77800 × 10

-4 0.090 0.746 102.030 13.600 3.75

C 23.0

221. 4839. 0.12 0.15617 × 10

-3 0.089 0.746 102.030 7.540 3.75

C 19.9
31

239. 4837. 0.16 0.18009 × 10-3 0.089 0.746 102.030 5.720 3.75 C 19.5

271. 4830. 0.25 0.22939 × 10-3 0.089 0.746 102.030 3.810 3.76 C 19.0

299. 4822. 0.35 0.28478 × 10-3 0.088 0.745 102.030 2.740 3.76 C 18.7

326. 4810. 0.48 0.35169 × 10-3 0.088 0.745 102.030 2.010 3.76 C 18.6

351. 4793. 0.66 0.43643 × 10-3 0.087 0.744 102.030 1.470 3.77 C 18.5

118. 7039. 0.02 0.52890 × 10-4 0.093 0.749 102.030 28.360 3.73 C 24.8

224. 7024. 0.07 0.14211 × 10-3 0.092 0.749 102.030 11.600 3.73 C 19.2

224. 7022. 0.11 0.15874 × 10-3 0.092 0.749 102.030 8.090 3.73 C 18.3

246. 7009. 0.19 0.21377 × 10-3 0.092 0.748 102.030 4.930 3.74 C 17.2

281. 6986. 0.29 0.29511 × 10-3 0.091 0.748 102.030 3.280 3.74 C 16.6

322. 6950. 0.44 0.40972 × 10-3 0.090 0.746 102.030 2.210 3.75 C 16.2

365. 6897. 0.66 0.57110 × 10-3 0.088 0.745 102.030 1.480 3.76 C 16.0

243. 7199. 0.08 0.15722 × 10-3 0.095 0.751 102.030 10.990 3.72 C 19.0

241. 7196. 0.12 0.17570 × 10-3 0.095 0.751 102.030 7.550 3.72 C 18.0

265. 7181. 0.21 0.23646 × 10-3 0.094 0.750 102.030 4.540 3.72 C 16.9

302. 7156. 0.32 0.32609 × 10-3 0.093 0.750 102.030 3.000 3.73 C 16.4

346. 7119. 0.48 0.45225 × 10-3 0.092 0.749 102.030 2.020 3.73 C 16.1

393. 7065. 0.73 0.62981 × 10-3 0.090 0.747 102.030 1.350 3.75 C 16.0

238. 9743. 0.14 0.19109 × 10-3 0.113 0.765 102.030 6.400 3.62 C 24.8

266. 9713. 0.23 0.27039 × 10-3 0.112 0.764 102.030 4.020 3.62 C 23.6

304. 9668. 0.37 0.38578 × 10-3 0.111 0.763 102.030 2.600 3.63 C 23.1

350. 9599. 0.58 0.55143 × 10-3 0.109 0.762 102.030 1.670 3.64 C 23.0

279. 4638. 0.09 0.46715 × 10-3 0.089 0.746 102.030 9.320 3.76 P 12.8

250. 4629. 0.28 0.36310 × 10-3 0.088 0.745 102.030 3.390 3.76 P 13.1

220. 4618. 0.42 0.27948 × 10-3 0.088 0.745 102.030 2.330 3.76 P 13.8

320. 7314. 0.08 0.50762 × 10-3 0.107 0.760 102.030 10.770 3.65 P 10.3

282. 7297. 0.28 0.37854 × 10-3 0.106 0.760 102.030 3.420 3.65 P 10.7

249. 7278. 0.41 0.28030 × 10-3 0.105 0.759 102.030 2.320 3.65 P 11.6
32

APPENDIX A2

Convective Boiling of R1234yf/ R134a (56/44) within a micro-fin tube

(file: GWPNU.dat)

Nu Re xq Bo Ps/Pc Ts/Tc Mw Sv Pr flow UNu

284. 5241. 0.18 0.16094 × 10-3 0.107 0.758 108.910 5.200 3.85 C 24.5

302. 5236. 0.25 0.19118 × 10-3 0.107 0.757 108.910 3.800 3.86 C 23.6

312. 5228. 0.33 0.22311 × 10-3 0.106 0.757 108.910 2.860 3.86 C 22.9

316. 5217. 0.44 0.25893 × 10-3 0.106 0.757 108.910 2.170 3.86 C 22.5

154. 5801. 0.03 0.77280 × 10-4 0.111 0.761 108.910 18.980 3.84 C 24.2

264. 5790. 0.10 0.16835 × 10-3 0.110 0.760 108.910 8.690 3.84 C 20.0

273. 5788. 0.14 0.18871 × 10-3 0.110 0.760 108.910 6.260 3.84 C 19.2

295. 5781. 0.23 0.23489 × 10-3 0.110 0.760 108.910 3.990 3.84 C 18.2

319. 5771. 0.34 0.29078 × 10-3 0.109 0.759 108.910 2.810 3.84 C 17.8

346. 5758. 0.47 0.36167 × 10-3 0.109 0.759 108.910 2.040 3.85 C 17.6

375. 5740. 0.66 0.45483 × 10-3 0.108 0.758 108.910 1.480 3.85 C 17.6

269. 7971. 0.09 0.11760 × 10-3 0.115 0.764 108.910 9.230 3.82 C 20.9

280. 7966. 0.12 0.13196 × 10-3 0.115 0.764 108.910 7.160 3.82 C 20.2

307. 7955. 0.19 0.16690 × 10-3 0.115 0.763 108.910 4.910 3.82 C 19.3

339. 7938. 0.26 0.21118 × 10-3 0.114 0.763 108.910 3.570 3.82 C 18.7

372. 7915. 0.36 0.26892 × 10-3 0.113 0.762 108.910 2.630 3.83 C 17.9

408. 7883. 0.50 0.34626 × 10-3 0.112 0.761 108.910 1.920 3.83 C 17.3

137. 7708. 0.03 0.62980 × 10-4 0.110 0.760 108.910 20.720 3.84 C 20.8

139. 7702. 0.05 0.71900 × 10-4 0.109 0.759 108.910 15.340 3.84 C 18.8

271. 7672. 0.11 0.18684 × 10-3 0.108 0.759 108.910 7.750 3.85 C 15.1

302. 7665. 0.16 0.22756 × 10-3 0.108 0.758 108.910 5.520 3.85 C 14.6

341. 7646. 0.28 0.30068 × 10-3 0.107 0.758 108.910 3.390 3.85 C 14.0

363. 7619. 0.41 0.37259 × 10-3 0.106 0.757 108.910 2.320 3.86 C 13.7

375. 7583. 0.59 0.45080 × 10-3 0.105 0.756 108.910 1.660 3.87 C 13.5

380. 7531. 0.82 0.54107 × 10-3 0.103 0.754 108.910 1.200 3.88 C 13.4

127. 10779. 0.01 0.38460 × 10-4 0.117 0.765 108.910 31.760 3.81 C 24.3

124. 10773. 0.02 0.43420 × 10-4 0.117 0.765 108.910 23.890 3.81 C 21.5

238. 10731. 0.07 0.11483 × 10-3 0.116 0.764 108.910 11.940 3.81 C 16.8

244. 10725. 0.10 0.12879 × 10-3 0.116 0.764 108.910 8.750 3.81 C 16.2

269. 10701. 0.16 0.16851 × 10-3 0.115 0.764 108.910 5.610 3.82 C 15.6

301. 10661. 0.24 0.22343 × 10-3 0.114 0.763 108.910 3.880 3.82 C 15.2

336. 10603. 0.35 0.29836 × 10-3 0.112 0.762 108.910 2.720 3.83 C 15.0

372. 10518. 0.51 0.40169 × 10-3 0.110 0.760 108.910 1.890 3.84 C 14.8

297. 5294. 0.04 0.27103 × 10-3 0.118 0.765 108.910 16.970 3.81 P 15.1

274. 5291. 0.15 0.21608 × 10-3 0.118 0.765 108.910 5.930 3.81 P 16.7

251. 5286. 0.23 0.17055 × 10-3 0.117 0.765 108.910 4.010 3.81 P 18.8

227. 5281. 0.29 0.13316 × 10-3 0.117 0.765 108.910 3.250 3.81 P 21.4

309. 5720. 0.19 0.38506 × 10-3 0.115 0.764 108.910 4.810 3.82 P 12.0

283. 5711. 0.33 0.29722 × 10-3 0.115 0.763 108.910 2.850 3.82 P 13.3

261. 5700. 0.43 0.22985 × 10-3 0.114 0.763 108.910 2.210 3.82 P 15.0

323. 7789. 0.17 0.33194 × 10-3 0.118 0.766 108.910 5.420 3.80 P 11.3
33

300. 7771. 0.29 0.25308 × 10

-3 0.117 0.765 108.910 3.260 3.81

P 12.7

281. 7750. 0.38 0.19347 × 10

-3 0.117 0.765 108.910 2.540 3.81

P 14.8

267. 7719. 0.45 0.14009 × 10

-3 0.115 0.764 108.910 2.130 3.82

P 18.6

266. 7699. 0.48 0.11772 × 10

-3 0.115 0.763 108.910 1.990 3.82

P 21.8

310. 10387. 0.09 0.24932 × 10

-3 0.119 0.766 108.910 9.300 3.80

P 11.4

292. 10359. 0.18 0.18967 × 10

-3 0.118 0.766 108.910 5.000 3.80

P 12.9

279. 10326. 0.25 0.14474 × 10

-3 0.117 0.765 108.910 3.770 3.81

P 15.2

273. 10278. 0.30 0.10475 × 10

-3 0.116 0.764 108.910 3.100 3.81

P 19.5

279. 10246. 0.33 0.88140 × 10

-4 0.115 0.763 108.910 2.880 3.82

P 23.3

244. 5469. 0.09 0.15067 × 10

-3 0.110 0.760 108.910 9.830 3.84

C 22.6

255. 5467. 0.12 0.17290 × 10

-3 0.110 0.760 108.910 7.030 3.84

C 21.6

274. 5462. 0.21 0.21700 × 10

-3 0.109 0.759 108.910 4.430 3.84

C 20.5

290. 5454. 0.31 0.26493 × 10

-3 0.109 0.759 108.910 3.100 3.85

C 20.2

305. 5443. 0.43 0.32148 × 10

-3 0.108 0.759 108.910 2.250 3.85

C 20.4

319. 5428. 0.59 0.39173 × 10

-3 0.108 0.758 108.910 1.650 3.85

C 21.0

151. 7778. 0.04 0.58980 × 10

-4 0.113 0.762 108.910 18.410 3.83

C 23.6

153. 7774. 0.05 0.67080 × 10

-4 0.113 0.762 108.910 14.270 3.83

C 21.3

265. 7751. 0.11 0.15365 × 10

-3 0.112 0.761 108.910 7.920 3.83

C 17.1

282. 7747. 0.15 0.17672 × 10

-3 0.112 0.761 108.910 5.970 3.83

C 16.6

313. 7733. 0.24 0.22931 × 10

-3 0.111 0.761 108.910 3.930 3.84

C 15.8

343. 7711. 0.34 0.29310 × 10

-3 0.110 0.760 108.910 2.780 3.84

C 15.2

371. 7678. 0.48 0.37406 × 10

-3 0.109 0.759 108.910 P0 3.85

C 14.7

397. 7631. 0.68 0.48040 × 10

-3 0.107 0.758 108.910 1.440 3.85

C 14.2

244. 10387. 0.06 0.11735 × 10

-3 0.112 0.761 108.910 13.320 3.83

C 20.9

247. 10382. 0.09 0.13363 × 10

-3 0.112 0.761 108.910 9.390 3.83

C 20.1

264. 10359. 0.16 0.17514 × 10

-3 0.111 0.761 108.910 5.780 3.83

C 19.2

285. 10320. 0.24 0.22921 × 10

-3 0.110 0.760 108.910 3.920 3.84

C 18.8

308. 10262. 0.35 0.30072 × 10

-3 0.109 0.759 108.910 2.730 3.85

C 18.6

330. 10177. 0.51 0.39729 × 10

-3 0.106 0.757 108.910 1.890 3.86

C 18.5

124. 10683. 0.02 0.36850 × 10

-4 0.115 0.764 108.910 26.920 3.82

C 24.2

124. 10675. 0.03 0.43370 × 10

-4 0.115 0.764 108.910 21.110 3.82

C 21.0

250. 10633. 0.07 0.12420 × 10

-3 0.114 0.763 108.910 10.840 3.82

C 16.0

254. 10627. 0.11 0.13885 × 10

-3 0.114 0.763 108.910 8.000 3.82

C 15.4

286. 10601. 0.18 0.18831 × 10

-3 0.113 0.762 108.910 5.120 3.83

C 14.5

331. 10556. 0.27 0.26199 × 10

-3 0.112 0.761 108.910 3.490 3.83

C 13.8

381. 10489. 0.40 0.36610 × 10

-3 0.110 0.760 108.910 2.390 3.84

C 13.1

432. 10390. 0.60 0.51285 × 10

-3 0.107 0.758 108.910 1.610 3.85

C 12.4

315. 5274. 0.04 0.36571 × 10

-3 0.113 0.762 108.910 18.710 3.83

P 13.1

290. 5269. 0.18 0.28783 × 10

-3 0.113 0.762 108.910 4.980 3.83

P 14.3

266. 5263. 0.29 0.22567 × 10

-3 0.113 0.762 108.910 3.250 3.83

P 16.0

243. 5255. 0.37 0.17686 × 10

-3 0.112 0.761 108.910 2.590 3.83

P 18.1

216. 5243. 0.44 0.13051 × 10

-3 0.112 0.761 108.910 2.200 3.83

P 21.3

202. 5235. 0.47 0.10952 × 10

-3 0.111 0.761 108.910 2.060 3.84

P 23.5

310. 10387. 0.09 0.24932 × 10

-3 0.119 0.766 108.910 9.300 3.80

P 11.4

292. 10359. 0.18 0.18967 × 10

-3 0.118 0.766 108.910 5.000 3.80

P 12.9

279. 10326. 0.25 0.14474 × 10

-3 0.117 0.765 108.910 3.770 3.81

P 15.2

273. 10278. 0.30 0.10475 × 10

-3 0.116 0.764 108.910 3.100 3.81

P 19.5

279. 10246. 0.33 0.88140 × 10

-4 0.115 0.763 108.910 2.880 3.82

P 23.3

288. 10501. 0.14 0.26964 × 10

-3 0.121 0.767 108.910 6.430 3.79

P 10.6
34

272. 10470. 0.24 0.20654 × 10

-3 0.120 0.767 108.910 3.910 3.80

P 11.9

261. 10433. 0.31 0.15896 × 10

-3 0.119 0.766 108.910 3.050 3.80

P 13.7

258. 10380. 0.37 0.11651 × 10

-3 0.117 0.765 108.910 2.560 3.81

P 17.5

266. 10346. 0.40 0.98810 × 10

-4 0.116 0.764 108.910 2.390 3.81

P 20.8

271. 5472. 0.11 0.15917 × 10

-3 0.112 0.762 108.910 7.890 3.83

C 22.0

287. 5470. 0.15 0.18119 × 10

-3 0.112 0.762 108.910 5.910 3.83

C 21.0

316. 5465. 0.24 0.22800 × 10

-3 0.112 0.761 108.910 3.890 3.83

C 19.7

345. 5457. 0.34 0.28194 × 10

-3 0.112 0.761 108.910 2.790 3.83

C 18.9

373. 5446. 0.47 0.34824 × 10

-3 0.111 0.761 108.910 2.040 3.84

C 18.4

402. 5431. 0.65 0.43337 × 10

-3 0.110 0.760 108.910 1.500 3.84

C 18.2

169. 7830. 0.04 0.68220 × 10

-4 0.117 0.765 108.910 15.720 3.81

C 22.9

284. 7810. 0.10 0.15178 × 10

-3 0.116 0.764 108.910 8.300 3.81

C 18.1

291. 7807. 0.14 0.16866 × 10

-3 0.116 0.764 108.910 6.230 3.81

C 17.3

318. 7794. 0.23 0.21545 × 10

-3 0.116 0.764 108.910 4.120 3.81

C 16.2

353. 7775. 0.32 0.27933 × 10

-3 0.115 0.764 108.910 2.930 3.82

C 15.3

393. 7746. 0.46 0.36599 × 10

-3 0.114 0.763 108.910 2.100 3.82

C 14.7

436. 7705. 0.65 0.48519 × 10

-3 0.112 0.762 108.910 1.490 3.83

C 14.2

136. 10224. 0.03 0.47430 × 10

-4 0.114 0.763 108.910 21.440 3.82

C 23.8

241. 10188. 0.07 0.11838 × 10

-3 0.113 0.762 108.910 11.100 3.83

C 18.4

247. 10183. 0.10 0.13340 × 10

-3 0.113 0.762 108.910 8.220 3.83

C 17.8

268. 10161. 0.17 0.17380 × 10

-3 0.112 0.761 108.910 5.320 3.83

C 17.2

295. 10125. 0.25 0.22807 × 10

-3 0.111 0.760 108.910 3.710 3.84

C 17.0

324. 10071. 0.36 0.30102 × 10

-3 0.109 0.759 108.910 2.630 3.84

C 17.0

354. 9993. 0.53 0.40066 × 10

-3 0.107 0.758 108.910 1.840 3.86

C 17.1

270. 5422. 0.09 0.20465 × 10

-3 0.112 0.761 108.910 9.500 3.83

P 16.8

247. 5417. 0.17 0.16173 × 10

-3 0.112 0.761 108.910 5.500 3.83

P 18.9

223. 5412. 0.22 0.12630 × 10

-3 0.111 0.761 108.910 4.210 3.84

P 21.4

274. 5322. 0.14 0.28379 × 10

-3 0.110 0.760 108.910 6.200 3.84

P 14.3

253. 5315. 0.25 0.22243 × 10

-3 0.109 0.759 108.910 3.750 3.84

P 16.9

231. 5307. 0.33 0.17402 × 10

-3 0.109 0.759 108.910 2.910 3.85

P 18.2

206. 5295. 0.39 0.12773 × 10

-3 0.108 0.759 108.910 2.430 3.85

P 20.5

193. 5286. 0.42 0.10660 × 10

-3 0.108 0.758 108.910 2.270 3.85

P 22.9

298. 7573. 0.05 0.38678 × 10

-3 0.109 0.759 108.910 15.420 3.85

P 10.5

285. 7558. 0.20 0.30408 × 10

-3 0.108 0.759 108.910 4.520 3.85

P 11.3

273. 7539. 0.32 0.23822 × 10

-3 0.108 0.758 108.910 2.990 3.85

P 12.7

263. 7515. 0.40 0.18667 × 10

-3 0.107 0.757 108.910 2.390 3.86

P 14.7

255. 7480. 0.48 0.13796 × 10

-3 0.105 0.756 108.910 2.040 3.86

P 18.5

313. 10773. 0.08 0.24388 × 10

-3 0.119 0.766 108.910 10.360 3.80

P 11.7

300. 10744. 0.17 0.18725 × 10

-3 0.118 0.766 108.910 5.330 3.80

P 13.3

290. 10708. 0.23 0.14371 × 10

-3 0.117 0.765 108.910 3.960 3.81

P 15.6

286. 10656. 0.29 0.10366 × 10

-3 0.116 0.764 108.910 3.230 3.82

P 20.3

291. 10622. 0.32 0.86250 × 10

-4 0.115 0.763 108.910 2.990 3.82

P 24.4

396. 5319. 0.55 0.32278 × 10

-3 0.107 0.757 108.910 1.760 3.86

C 24.7

313. 7630. 0.11 0.15615 × 10

-3 0.107 0.758 108.910 8.010 3.85

C 19.8

329. 7626. 0.15 0.17889 × 10

-3 0.107 0.758 108.910 6.000 3.86

C 19.0

355. 7611. 0.24 0.22937 × 10

-3 0.106 0.757 108.910 3.930 3.86

C 17.7

378. 7587. 0.34 0.28945 × 10

-3 0.106 0.756 108.910 2.780 3.86

C 16.7

398. 7553. 0.48 0.36480 × 10

-3 0.104 0.756 108.910 2.020 3.87

C 15.9

415. 7504. 0.67 0.46293 × 10

-3 0.102 0.754 108.910 1.460 3.88

C 15.2
35

289. 10135. 0.07 0.12690 × 10

-3 0.117 0.765 108.910 10.930 3.81

C 19.0

294. 10129. 0.11 0.14293 × 10

-3 0.117 0.765 108.910 7.980 3.81

C 18.2

315. 107. 0.18 0.18559 × 10

-3 0.116 0.764 108.910 5.100 3.81

C 17.1

342. 10072. 0.27 0.24253 × 10

-3 0.115 0.763 108.910 3.540 3.82

C 16.3

371. 10019. 0.38 0.31883 × 10

-3 0.113 0.762 108.910 2.500 3.83

C 15.7

400. 9943. 0.56 0.42286 × 10

-3 0.111 0.761 108.910 1.750 3.84

C 15.2

339. 5309. 0.07 0.20810 × 10

-3 0.116 0.764 108.910 11.060 3.81

P 21.2

315. 5305. 0.15 0.16269 × 10

-3 0.116 0.764 108.910 5.960 3.82

P 24.5

331. 7761. 0.03 0.40682 × 10

-3 0.110 0.760 108.910 21.010 3.84

P 11.4

321. 7745. 0.20 0.31810 × 10

-3 0.109 0.759 108.910 4.730 3.85

P 12.5

313. 7723. 0.31 0.24761 × 10

-3 0.108 0.759 108.910 3.030 3.85

P 14.2

309. 7697. 0.40 0.19261 × 10

-3 0.107 0.758 108.910 2.400 3.85

P 16.9

313. 7659. 0.48 0.14084 × 10

-3 0.106 0.757 108.910 2.030 3.86

P 22.4

341. 10648. 0.10 0.23945 × 10

-3 0.124 0.770 108.910 8.720 3.78

P 12.9

336. 10622. 0.18 0.18602 × 10

-3 0.123 0.769 108.910 4.890 3.78

P 15.0

335. 10590. 0.25 0.14354 × 10

-3 0.122 0.768 108.910 3.720 3.79

P 18.1

344. 10544. 0.31 0.10243 × 10

-3 0.121 0.768 108.910 3.070 3.79

P 24.9

430. 5182. 0.43 0.31165 × 10

-3 0.114 0.763 108.910 2.230 3.82

C 24.3

459. 5171. 0.59 0.39198 × 10

-3 0.113 0.762 108.910 1.640 3.83

C 23.4

170. 7750. 0.04 0.64350 × 10

-4 0.111 0.760 108.910 17.280 3.84

C 24.5

299. 7724. 0.10 0.15596 × 10

-3 0.110 0.760 108.910 8.730 3.84

C 18.5

308. 7719. 0.14 0.17608 × 10

-3 0.110 0.760 108.910 6.400 3.84

C 17.6

336. 7704. 0.23 0.22740 × 10

-3 0.109 0.759 108.910 4.120 3.85

C 16.2

368. 7681. 0.33 0.29435 × 10

-3 0.108 0.758 108.910 2.880 3.85

C 15.2

403. 7649. 0.47 0.38298 × 10

-3 0.107 0.758 108.910 2.050 3.86

C 14.5

439. 7603. 0.68 0.50291 × 10

-3 0.105 0.756 108.910 1.440 3.86

C 13.9

297. 10593. 0.06 0.11992 × 10

-3 0.117 0.765 108.910 12.400 3.81

C 21.2

301. 10588. 0.10 0.13595 × 10

-3 0.116 0.765 108.910 8.870 3.81

C 20.0

318. 10565. 0.16 0.17605 × 10

-3 0.116 0.764 108.910 5.560 3.81

C 18.5

338. 10528. 0.24 0.22772 × 10

-3 0.115 0.763 108.910 3.820 3.82

C 17.7

360. 10473. 0.35 0.29563 × 10

-3 0.113 0.762 108.910 2.690 3.83

C 17.2

381. 10393. 0.51 0.38701 × 10

-3 0.111 0.760 108.910 1.890 3.84

C 17.1

414. 5020. 0.01 0.31866 × 10

-3 0.112 0.762 108.910 41.850 3.83

P 19.9

409. 5016. 0.14 0.25133 × 10

-3 0.112 0.761 108.910 6.570 3.83

P 23.5

320. 7707. 0.07 0.39148 × 10

-3 0.111 0.760 108.910 11.920 3.84

P 11.3

312. 7691. 0.23 0.30912 × 10

-3 0.110 0.760 108.910 4.130 3.84

P 12.3

306. 7669. 0.34 0.24302 × 10

-3 0.109 0.759 108.910 2.790 3.84

P 14.0

302. 7643. 0.43 0.19075 × 10

-3 0.108 0.759 108.910 2.260 3.85

P 16.6

305. 10264. 0.13 0.26885 × 10

-3 0.121 0.768 108.910 6.610 3.79

P 11.1

291. 10234. 0.23 0.20769 × 10

-3 0.121 0.767 108.910 3.970 3.79

P 12.5

280. 10198. 0.30 0.15987 × 10

-3 0.119 0.767 108.910 3.090 3.80

P 14.6

271. 10147. 0.37 0.11474 × 10

-3 0.118 0.766 108.910 2.590 3.81

P 18.6

270. 10114. 0.40 0.94450 × 10

-4 0.117 0.765 108.910 2.420 3.81

P 22.1

235. 5259. 0.11 0.12665 × 10

-3 0.108 0.758 108.910 7.670 3.85

C 24.8

267. 5255. 0.18 0.16133 × 10

-3 0.108 0.758 108.910 5.200 3.85

C 23.7

285. 5250. 0.25 0.19218 × 10

-3 0.107 0.758 108.910 3.800 3.85

C 22.9

292. 5243. 0.33 0.22260 × 10

-3 0.107 0.758 108.910 2.860 3.86

C 22.5

291. 5232. 0.44 0.25424 × 10

-3 0.106 0.757 108.910 2.180 3.86

C 22.3

249. 5325. 0.11 0.14638 × 10

-3 0.109 0.759 108.910 8.080 3.84

C 23.1
36

265. 5323. 0.15 0.16738 × 10-3 0.109 0.759 108.910 6.130 3.84 C 22.2

291. 5318. 0.23 0.20977 × 10-3 0.109 0.759 108.910 4.100 3.84 C 21.2

313. 5311. 0.32 0.25656 × 10-3 0.109 0.759 108.910 2.960 3.85 C 20.6

334. 5301. 0.44 0.31239 × 10-3 0.108 0.758 108.910 2.190 3.85 C 20.3

353. 5287. 0.60 0.38241 × 10-3 0.107 0.758 108.910 1.630 3.85 C 20.2

292. 4916. 0.05 0.35484 × 10-3 0.107 0.757 108.910 15.850 3.86 P 14.1

270. 4912. 0.19 0.27843 × 10-3 0.107 0.757 108.910 4.860 3.86 P 15.2

251. 4906. 0.29 0.21838 × 10-3 0.106 0.757 108.910 3.230 3.86 P 17.0

234. 4898. 0.37 0.17216 × 10-3 0.106 0.757 108.910 2.600 3.86 P 19.3

219. 4888. 0.44 0.12958 × 10-3 0.105 0.756 108.910 2.210 3.86 P 23.2

247. 5318. 0.11 0.15097 × 10-3 0.109 0.759 108.910 7.860 3.84 C 22.2

266. 5315. 0.15 0.17612 × 10-3 0.109 0.759 108.910 5.940 3.84 C 21.3

292. 5310. 0.24 0.22141 × 10-3 0.109 0.759 108.910 3.940 3.85 C 20.2

310. 5302. 0.33 0.26611 × 10-3 0.109 0.759 108.910 2.840 3.85 C 19.7

322. 5292. 0.46 0.31490 × 10-3 0.108 0.758 108.910 2.120 3.85 C 19.5

330. 5279. 0.61 0.37147 × 10-3 0.107 0.758 108.910 1.590 3.85 C 19.5

416. 5335. 0.13 0.29771 × 10-3 0.119 0.766 108.910 6.860 3.80 P 20.3

411. 5329. 0.24 0.23342 × 10-3 0.118 0.766 108.910 3.900 3.80 P 24.2
37

APPENDIX A3

Convective Boiling of R1234ze(E) within a micro-fin tube

(file: GWPNU.dat)

Nu Re xq Bo Ps/Pc Ts/Tc Mw Sv Pr flow UNu

244. 4334. 0.11 0.13621 × 10-3 0.074 0.730 114.040 8.280 4.08 C 24.5

282. 4329. 0.18 0.17609 × 10-3 0.074 0.730 114.040 5.250 4.08 C 23.1

318. 4322. 0.26 0.22403 × 10-3 0.073 0.729 114.040 3.650 4.08 C 21.8

353. 4312. 0.37 0.28426 × 10-3 0.073 0.729 114.040 2.600 4.09 C 20.7

387. 4297. 0.53 0.36244 × 10-3 0.072 0.728 114.040 1.850 4.10 C 19.5

228. 6670. 0.06 0.11317 × 10-3 0.075 0.731 114.040 13.060 4.07 C 20.6

235. 6666. 0.10 0.12667 × 10-3 0.075 0.731 114.040 9.310 4.07 C 19.9

260. 6649. 0.16 0.16753 × 10-3 0.074 0.730 114.040 5.790 4.08 C 18.5

291. 6622. 0.24 0.22503 × 10-3 0.073 0.729 114.040 3.910 4.08 C 17.3

322. 6582. 0.36 0.30300 × 10-3 0.072 0.728 114.040 2.680 4.10 C 16.2

352. 6523. 0.54 0.40843 × 10-3 0.070 0.726 114.040 1.820 4.11 C 15.2

237. 9286. 0.03 0.10420 × 10-3 0.082 0.738 114.040 20.770 4.01 C 23.7

230. 9282. 0.06 0.11341 × 10-3 0.082 0.738 114.040 13.600 4.01 C 22.6

243. 9257. 0.11 0.15038 × 10-3 0.082 0.737 114.040 7.870 4.02 C 20.8

270. 9211. 0.18 0.20752 × 10-3 0.080 0.736 114.040 5.080 4.03 C 19.4

300. 9140. 0.29 0.28732 × 10-3 0.079 0.734 114.040 3.340 4.04 C 18.2

330. 9034. 0.45 0.39585 × 10-3 0.076 0.732 114.040 2.180 4.06 C 17.1

228. 4437. 0.01 0.25508 × 10-3 0.072 0.728 114.040 49.960 4.10 P 16.2

223. 4432. 0.12 0.19937 × 10-3 0.072 0.727 114.040 7.770 4.10 P 18.1

221. 4425. 0.20 0.15564 × 10-3 0.071 0.727 114.040 4.810 4.10 P 21.1

284. 6960. 0.13 0.28961 × 10-3 0.081 0.737 114.040 6.790 4.02 P 13.1

286. 6939. 0.24 0.22333 × 10-3 0.081 0.736 114.040 4.000 4.02 P 15.4

294. 6914. 0.31 0.17058 × 10-3 0.080 0.736 114.040 3.090 4.03 P 19.2

206. 6751. 0.01 0.23563 × 10-3 0.077 0.733 114.040 56.430 4.05 P 10.3

206. 6739. 0.10 0.18371 × 10-3 0.077 0.732 114.040 8.830 4.06 P 12.1

210. 6721. 0.17 0.14309 × 10-3 0.076 0.732 114.040 5.460 4.06 P 14.7

221. 6699. 0.22 0.11216 × 10-3 0.075 0.731 114.040 4.270 4.07 P 18.8

398. 4606. 0.40 0.30454 × 10-3 0.073 0.729 114.040 2.450 4.09 C 23.4

427. 4587. 0.57 0.39570 × 10-3 0.072 0.728 114.040 1.730 4.10 C 21.8

206. 6333. 0.08 0.10391 × 10-3 0.070 0.725 114.040 11.310 4.12 C 20.0

229. 6330. 0.11 0.12313 × 10-3 0.069 0.725 114.040 8.380 4.12 C 19.6

262. 6313. 0.18 0.16604 × 10-3 0.069 0.725 114.040 5.340 4.12 C 18.6

285. 6284. 0.26 0.21675 × 10-3 0.068 0.724 114.040 3.670 4.13 C 17.4

299. 6241. 0.38 0.27922 × 10-3 0.067 0.722 114.040 2.570 4.15 C 16.3

307. 6177. 0.55 0.35829 × 10-3 0.065 0.720 114.040 1.800 4.17 C 15.1

216. 9439. 0.05 0.10544 × 10-3 0.086 0.741 114.040 16.790 3.98 C 19.6

223. 9435. 0.07 0.11866 × 10-3 0.086 0.741 114.040 11.880 3.99 C 18.9

252. 9410. 0.12 0.16026 × 10-3 0.085 0.740 114.040 7.260 3.99 C 17.7

285. 9367. 0.19 0.21893 × 10-3 0.084 0.739 114.040 4.820 4.00 C 16.6

319. 9300. 0.30 0.29730 × 10-3 0.082 0.738 114.040 3.240 4.01 C 15.6
38

349. 9200. 0.45 0.40073 × 10

-3 0.080 0.736 114.040 2.150 4.03

C 14.7

239. 4661. 0.01 0.30656 × 10

-3 0.078 0.734 114.040 50.880 4.05

P 12.4

234. 4656. 0.13 0.24249 × 10

-3 0.077 0.733 114.040 7.000 4.05

P 14.1

229. 4648. 0.22 0.19056 × 10

-3 0.077 0.733 114.040 4.280 4.05

P 16.7

226. 4638. 0.29 0.14916 × 10

-3 0.077 0.733 114.040 3.340 4.06

P 20.2

253. 7202. 0.10 0.30516 × 10

-3 0.086 0.741 114.040 8.530 3.98

P 11.0

249. 7180. 0.20 0.23161 × 10

-3 0.085 0.741 114.040 4.620 3.99

P 13.0

250. 7153. 0.27 0.17599 × 10

-3 0.085 0.740 114.040 3.480 3.99

P 16.0

265. 7113. 0.34 0.12624 × 10

-3 0.083 0.739 114.040 2.850 4.00

P 22.2

207. 6627. 0.09 0.18755 × 10

-3 0.077 0.733 114.040 9.930 4.06

P 12.1

208. 6611. 0.16 0.14641 × 10

-3 0.076 0.732 114.040 5.820 4.06

P 14.6

214. 6590. 0.21 0.11455 × 10

-3 0.075 0.731 114.040 4.460 4.07

P 18.1

205. 4261. 0.07 0.11900 × 10

-3 0.070 0.726 114.040 12.220 4.12

C 24.3

220. 4259. 0.11 0.13760 × 10

-3 0.070 0.726 114.040 8.580 4.12

C 23.4

246. 4253. 0.18 0.17764 × 10

-3 0.070 0.725 114.040 5.270 4.12

C 22.1

268. 4245. 0.27 0.22404 × 10

-3 0.069 0.725 114.040 3.610 4.12

C 21.4

289. 4233. 0.38 0.28098 × 10

-3 0.069 0.724 114.040 2.550 4.13

C 20.9

309. 4217. 0.54 0.35357 × 10

-3 0.068 0.723 114.040 1.810 4.14

C 20.7

238. 6791. 0.06 0.10646 × 10

-3 0.074 0.730 114.040 13.810 4.08

C 21.9

245. 6787. 0.09 0.11875 × 10

-3 0.074 0.730 114.040 9.830 4.08

C 21.3

269. 6771. 0.15 0.15457 × 10

-3 0.073 0.729 114.040 6.130 4.08

C 19.8

295. 6745. 0.23 0.20411 × 10

-3 0.072 0.728 114.040 4.180 4.09

C 18.5

320. 6706. 0.33 0.27080 × 10

-3 0.071 0.727 114.040 2.890 4.10

C 17.2

343. 6648. 0.49 0.36063 × 10

-3 0.069 0.725 114.040 1.990 4.12

C 16.1

217. 9402. 0.04 0.95610 × 10

-4 0.081 0.736 114.040 19.080 4.02

C 22.6

216. 9398. 0.06 0.10598 × 10

-3 0.081 0.736 114.040 13.070 4.02

C 21.8

233. 9372. 0.12 0.14118 × 10

-3 0.080 0.736 114.040 7.810 4.03

C 20.3

258. 9326. 0.18 0.19264 × 10

-3 0.079 0.735 114.040 5.140 4.04

C 19.1

285. 9256. 0.28 0.26298 × 10

-3 0.077 0.733 114.040 3.430 4.05

C 18.1

310. 9151. 0.43 0.35762 × 10

-3 0.075 0.731 114.040 2.280 4.07

C 17.1

267. 2192. 0.06 0.34857 × 10

-3 0.071 0.726 114.040 15.060 4.11

P 22.3

255. 2191. 0.21 0.27768 × 10

-3 0.070 0.726 114.040 4.590 4.11

P 25.0

248. 4364. 0.13 0.34036 × 10

-3 0.074 0.730 114.040 6.890 4.08

P 12.6

244. 4355. 0.27 0.26563 × 10

-3 0.074 0.730 114.040 3.620 4.08

P 14.6

242. 4342. 0.36 0.20601 × 10

-3 0.073 0.729 114.040 2.690 4.08

P 17.5

242. 4324. 0.44 0.14822 × 10

-3 0.072 0.728 114.040 2.200 4.09

P 23.3

194. 6492. 0.09 0.18181 × 10

-3 0.072 0.728 114.040 9.570 4.09

P 11.1

197. 6477. 0.17 0.14472 × 10

-3 0.072 0.728 114.040 5.640 4.10

P 13.2

204. 6460. 0.22 0.11488 × 10

-3 0.071 0.727 114.040 4.320 4.10

P 16.4

223. 6434. 0.27 0.85580 × 10

-4 0.070 0.726 114.040 3.560 4.11

P 23.2

275. 6786. 0.00 0.41468 × 10

-3 0.081 0.737 114.040 57.240 4.02

P 10.8

264. 6767. 0.16 0.32230 × 10

-3 0.081 0.736 114.040 5.670 4.02

P 11.6

254. 6744. 0.28 0.24723 × 10

-3 0.080 0.736 114.040 3.430 4.03

P 13.1

244. 6719. 0.36 0.18713 × 10

-3 0.079 0.735 114.040 2.670 4.04

P 15.3

233. 6685. 0.43 0.12843 × 10

-3 0.078 0.734 114.040 2.250 4.05

P 20.0

229. 6664. 0.46 0.10087 × 10

-3 0.077 0.733 114.040 2.110 4.05

P 24.5

323. 4464. 0.26 0.21255 × 10

-3 0.072 0.728 114.040 3.680 4.09

C 24.1

345. 4454. 0.36 0.26266 × 10

-3 0.072 0.728 114.040 2.660 4.10

C 23.0

363. 4438. 0.51 0.32560 × 10

-3 0.071 0.727 114.040 1.920 4.10

C 21.9
39

222. 6590. 0.06 0.11322 × 10-3 0.074 0.730 114.040 13.420 4.08 C 20.2

230. 6586. 0.09 0.12763 × 10-3 0.074 0.730 114.040 9.450 4.08 C 19.5

250. 6570. 0.16 0.16672 × 10-3 0.073 0.729 114.040 5.810 4.09 C 18.1

273. 6544. 0.24 0.21889 × 10-3 0.072 0.728 114.040 3.930 4.09 C 16.9

295. 6505. 0.36 0.28783 × 10-3 0.071 0.727 114.040 2.720 4.10 C 15.9

315. 6448. 0.52 0.37957 × 10-3 0.069 0.725 114.040 1.870 4.12 C 15.0

213. 9097. 0.05 0.10171 × 10-3 0.081 0.737 114.040 16.790 4.02 C 21.0

214. 9092. 0.07 0.11344 × 10-3 0.081 0.737 114.040 11.750 4.02 C 20.2

230. 9067. 0.13 0.14996 × 10-3 0.080 0.736 114.040 7.160 4.03 C 18.8

252. 9022. 0.20 0.20148 × 10-3 0.079 0.735 114.040 4.780 4.03 C 17.7

275. 8954. 0.30 0.27074 × 10-3 0.078 0.733 114.040 3.240 4.05 C 16.8

298. 8854. 0.45 0.36299 × 10-3 0.075 0.731 114.040 2.180 4.07 C 16.0

263. 2205. 0.05 0.32156 × 10-3 0.070 0.726 114.040 16.970 4.12 P 23.2

274. 4444. 0.00 0.31468 × 10-3 0.075 0.730 114.040 61.700 4.07 P 14.6

277. 4439. 0.14 0.25573 × 10-3 0.074 0.730 114.040 6.700 4.08 P 16.6

279. 4431. 0.24 0.20500 × 10-3 0.074 0.730 114.040 4.010 4.08 P 19.6

279. 4421. 0.31 0.16170 × 10-3 0.073 0.729 114.040 3.090 4.08 P 23.7

277. 4606. 0.17 0.33844 × 10-3 0.078 0.734 114.040 5.460 4.05 P 14.1

259. 4596. 0.30 0.26302 × 10-3 0.077 0.733 114.040 3.240 4.05 P 15.7

238. 4585. 0.39 0.19975 × 10-3 0.077 0.733 114.040 2.510 4.06 P 17.9

205. 4569. 0.46 0.13410 × 10-3 0.076 0.732 114.040 2.110 4.06 P 21.8

180. 4559. 0.49 0.10125 × 10-3 0.076 0.731 114.040 1.980 4.07 P 25.0

192. 6406. 0.07 0.17881 × 10-3 0.073 0.729 114.040 12.570 4.09 P 11.8

200. 6390. 0.14 0.14326 × 10-3 0.072 0.728 114.040 6.610 4.09 P 14.2

210. 6370. 0.19 0.11382 × 10-3 0.072 0.727 114.040 4.880 4.10 P 17.7

292. 6768. 0.04 0.39651 × 10-3 0.082 0.737 114.040 19.670 4.02 P 11.4

290. 6750. 0.19 0.31129 × 10-3 0.081 0.737 114.040 4.950 4.02 P 12.6

289. 6728. 0.30 0.24141 × 10-3 0.080 0.736 114.040 3.190 4.03 P 14.7

292. 6702. 0.38 0.18494 × 10-3 0.080 0.735 114.040 2.540 4.03 P 18.0

286. 2202. 0.02 0.39490 × 10-3 0.077 0.733 114.040 34.690 4.06 P 23.3

236. 4348. 0.02 0.26964 × 10-3 0.071 0.726 114.040 29.860 4.11 P 13.5

238. 4343. 0.14 0.21689 × 10-3 0.070 0.726 114.040 6.610 4.11 P 15.7

240. 4335. 0.23 0.17294 × 10-3 0.070 0.726 114.040 4.180 4.11 P 18.7

243. 4325. 0.29 0.13673 × 10-3 0.070 0.725 114.040 3.280 4.12 P 23.1

259. 4431. 0.05 0.36018 × 10-3 0.073 0.729 114.040 17.450 4.09 P 12.9

253. 4424. 0.20 0.28945 × 10-3 0.072 0.728 114.040 4.720 4.09 P 14.1

245. 4415. 0.32 0.22889 × 10-3 0.072 0.728 114.040 3.060 4.10 P 15.9

233. 4403. 0.40 0.17746 × 10-3 0.071 0.727 114.040 2.440 4.10 P 18.4

210. 4387. 0.47 0.12333 × 10-3 0.071 0.727 114.040 2.070 4.11 P 23.0
40

APPENDIX B1

Convective Boiling of R134a within a micro-fin tube

(file: lowgwpq.dat)

q” 

(Wm-2)

∆Ts

(K)

xq Gr

(kg m-2s

-1

)

Tw (K) Ts (K) Tf (K) z (m) Mw

(g/mole)

flow

15040. 3.84 0.11 326. 285.50 281.70 292.20 0.97 102.03 P

11240. 3.18 0.19 326. 284.70 281.50 289.80 1.54 102.03 P

8476. 2.62 0.26 326. 283.90 281.30 287.80 2.06 102.03 P

6153. 2.05 0.31 326. 283.00 281.00 286.30 2.66 102.03 P

5270. 1.77 0.33 326. 282.50 280.70 285.20 3.00 102.03 P

14260. 3.73 0.09 332. 285.00 281.30 291.40 0.97 102.03 P

10710. 3.09 0.17 332. 284.20 281.10 289.10 1.54 102.03 P

8110. 2.54 0.23 332. 283.50 280.90 287.20 2.06 102.03 P

5900. 1.97 0.28 332. 282.60 280.60 285.70 2.66 102.03 P

5046. 1.69 0.30 332. 282.10 280.40 284.70 3.00 102.03 P

13380. 3.66 0.09 396. 284.80 281.10 290.60 0.97 102.03 P

10080. 3.02 0.16 396. 284.00 281.00 288.50 1.54 102.03 P

7650. 2.49 0.20 396. 283.20 280.80 286.70 2.06 102.03 P

5555. 1.93 0.24 396. 282.40 280.50 285.30 2.66 102.03 P

4728. 1.65 0.26 396. 281.90 280.30 284.40 3.00 102.03 P

13290. 3.64 0.09 400. 284.70 281.00 290.40 0.97 102.03 P

10030. 3.01 0.15 400. 283.90 280.80 288.40 1.54 102.03 P

7609. 2.47 0.19 399. 283.10 280.60 286.60 2.06 102.03 P

5520. 1.92 0.23 399. 282.30 280.30 285.20 2.66 102.03 P

4689. 1.64 0.25 399. 281.80 280.10 284.20 3.00 102.03 P

8400. 1.73 0.33 198. 280.50 278.70 286.50 5.72 102.03 C

9846. 1.97 0.44 198. 280.50 278.60 288.20 6.34 102.03 C

2620. 1.39 0.03 308. 280.70 279.30 282.00 2.66 102.03 C

2960. 1.52 0.04 308. 280.80 279.20 282.50 3.00 102.03 C

6318. 1.92 0.08 308. 280.90 279.00 283.00 3.69 102.03 C

7140. 2.03 0.11 308. 281.00 279.00 284.20 4.03 102.03 C

9165. 2.31 0.17 308. 281.20 278.90 286.30 4.61 102.03 C

11760. 2.65 0.24 308. 281.30 278.70 288.00 5.15 102.03 C

15160. 3.09 0.33 308. 281.50 278.40 290.80 5.72 102.03 C

19740. 3.69 0.46 308. 281.60 277.90 294.40 6.34 102.03 C

5787. 2.07 0.04 414. 281.30 279.20 283.20 3.69 102.03 C

6675. 2.25 0.06 414. 281.40 279.20 284.30 4.03 102.03 C

8668. 2.63 0.10 414. 281.70 279.10 286.30 4.61 102.03 C

11060. 3.08 0.15 414. 281.90 278.80 287.90 5.15 102.03 C

14090. 3.65 0.22 414. 282.20 278.50 290.50 5.72 102.03 C

18060. 4.38 0.31 414. 282.40 278.10 293.80 6.34 102.03 C

17980. 4.26 0.09 199. 283.30 279.00 292.00 0.35 102.03 P

13960. 3.81 0.28 199. 282.70 278.80 288.90 0.97 102.03 P

10740. 3.41 0.41 199. 282.10 278.70 286.70 1.54 102.03 P

13650. 3.64 0.09 306. 283.50 279.90 289.50 0.97 102.03 P

10570. 3.01 0.18 306. 282.70 279.70 287.40 1.54 102.03 P
41

8229. 2.49 0.24 306. 282.00 279.50 285.50 2.06 102.03P

6107. 1.96 0.30 306. 281.10 279.20 284.10 2.66 102.03P

5203. 1.70 0.32 306. 280.70 279.00 283.20 3.00 102.03P

12730. 3.53 0.08 407. 284.20 280.70 289.60 0.97 102.03P

9829. 2.90 0.14 407. 283.40 280.50 287.70 1.54 102.03P

7630. 2.38 0.18 407. 282.70 280.30 286.00 2.06 102.03P

5652. 1.84 0.22 407. 281.90 280.00 284.70 2.66 102.03P

4818. 1.57 0.24 407. 281.40 279.80 283.80 3.00 102.03P

2959. 1.41 0.04 226. 281.80 280.40 283.50 3.00 102.03C

6249. 1.73 0.10 226. 282.00 280.20 284.00 3.69 102.03C

6988. 1.84 0.14 226. 282.10 280.20 285.10 4.03 102.03C

8792. 2.08 0.21 226. 282.20 280.10 287.10 4.61 102.03C

11090. 2.34 0.30 226. 282.30 280.00 288.80 5.15 102.03C

14090. 2.68 0.42 226. 282.50 279.80 291.40 5.72 102.03C

18120. 3.10 0.59 226. 282.60 279.50 294.70 6.34 102.03C

2966. 1.53 0.02 303. 282.10 280.50 283.40 2.66 102.03C

3462. 1.70 0.03 303. 282.20 280.50 284.10 3.00 102.03C

8025. 2.19 0.08 303. 282.50 280.30 284.80 3.69 102.03C

8727. 2.36 0.12 303. 282.60 280.20 286.20 4.03 102.03C

11100. 2.73 0.19 303. 282.80 280.10 289.10 4.61 102.03C

14660. 3.17 0.28 303. 283.00 279.90 291.50 5.15 102.03C

19700. 3.73 0.40 303. 283.30 279.50 295.00 5.72 102.03C

26840. 4.48 0.58 303. 283.50 279.00 300.20 6.34 102.03C

3309. 1.83 0.01 407. 284.10 282.30 285.80 3.00 102.03C

8453. 2.51 0.05 407. 284.50 282.00 286.60 3.69 102.03C

9097. 2.75 0.08 407. 284.70 282.00 288.10 4.03 102.03C

11650. 3.28 0.13 407. 285.10 281.80 291.20 4.61 102.03C

15680. 3.90 0.20 407. 285.40 281.50 293.90 5.15 102.03C

21530. 4.68 0.30 407. 285.80 281.10 297.90 5.72 102.03C

29940. 5.70 0.46 407. 286.20 280.50 303.90 6.34 102.03C

17690. 4.16 0.00 209. 283.40 279.20 292.10 0.35 102.03P

13960. 3.50 0.18 209. 282.60 279.10 289.00 0.97 102.03P

11010. 2.93 0.31 209. 281.90 279.00 286.90 1.54 102.03P

8705. 2.45 0.40 209. 281.30 278.90 285.00 2.06 102.03P

6545. 1.94 0.49 209. 280.60 278.60 283.50 2.66 102.03P

18340. 4.45 0.09 306. 287.50 283.00 295.10 0.97 102.03P

13900. 3.68 0.21 306. 286.60 282.90 292.30 1.54 102.03P

10610. 3.04 0.29 306. 285.70 282.60 289.80 2.06 102.03P

7783. 2.36 0.36 306. 284.70 282.30 288.10 2.66 102.03P

6666. 2.02 0.39 306. 284.10 282.10 286.80 3.00 102.03P

12290. 3.41 0.06 405. 284.50 281.10 289.60 0.97 102.03P

9516. 2.81 0.12 405. 283.70 280.90 287.80 1.54 102.03P

7427. 2.29 0.16 405. 283.00 280.70 286.10 2.06 102.03P

5569. 1.77 0.20 405. 282.20 280.40 284.90 2.66 102.03P

4798. 1.50 0.22 405. 281.70 280.20 284.00 3.00 102.03P

2815. 1.39 0.04 219. 280.80 279.40 282.10 2.66 102.03C

3309. 1.50 0.06 219. 280.80 279.30 282.70 3.00 102.03C

6646. 1.84 0.12 219. 281.00 279.20 283.30 3.69 102.03C

7665. 1.95 0.16 219. 281.10 279.10 284.50 4.03 102.03C
42

9768. 2.20 0.25 219. 281.20 279.00 286.80 4.61 102.03 C

12130. 2.47 0.35 219. 281.40 278.90 288.70 5.15 102.03 C

15000. 2.80 0.48 219. 281.50 278.70 291.50 5.72 102.03 C

18630. 3.23 0.66 219. 281.60 278.40 295.00 6.34 102.03 C

3210. 1.67 0.02 314. 282.00 280.30 284.60 3.00 102.03 C

8631. 2.36 0.07 314. 282.50 280.20 285.70 3.69 102.03 C

9642. 2.64 0.11 314. 282.80 280.20 288.10 4.03 102.03 C

12990. 3.23 0.19 314. 283.20 280.00 293.20 4.61 102.03 C

17960. 3.91 0.29 314. 283.70 279.70 297.30 5.15 102.03 C

24970. 4.74 0.44 314. 284.10 279.30 304.30 5.72 102.03 C

34900. 5.82 0.66 314. 284.50 278.70 314.60 6.34 102.03 C

9654. 2.45 0.08 319. 283.40 281.00 286.50 3.69 102.03 C

10790. 2.75 0.12 319. 283.70 281.00 288.90 4.03 102.03 C

14530. 3.38 0.21 319. 284.20 280.80 294.30 4.61 102.03 C

20060. 4.08 0.32 319. 284.60 280.50 298.70 5.15 102.03 C

27880. 4.94 0.48 319. 285.00 280.10 306.00 5.72 102.03 C

38920. 6.04 0.73 319. 285.50 279.50 316.80 6.34 102.03 C

14530. 3.85 0.14 404. 290.10 286.20 298.30 4.61 102.03 C

20590. 4.89 0.23 404. 290.80 286.00 302.80 5.15 102.03 C

29420. 6.09 0.37 404. 291.70 285.60 309.80 5.72 102.03 C

42170. 7.56 0.58 404. 292.60 285.00 320.80 6.34 102.03 C

19100. 4.18 0.09 211. 283.20 279.00 293.50 0.35 102.03 P

14850. 3.62 0.28 210. 282.50 278.90 289.90 0.97 102.03 P

11440. 3.16 0.42 210. 281.90 278.70 287.30 1.54 102.03 P

29830. 5.84 0.08 310. 290.30 284.50 303.10 0.35 102.03 P

22260. 4.94 0.28 310. 289.30 284.30 297.90 0.97 102.03 P

16500. 4.15 0.41 310. 288.30 284.10 294.50 1.54 102.03 P
43

APPENDIX B2

Convective Boiling of R1234yf/ R134a (56/44) within a micro-fin tube

(file: lowgwpq.dat)

q” 

(Wm-2)

∆Ts

(K)

xq Gr

(kg m-2s

-1

)

Tw (K) Ts (K) Tf (K) z (m) Mw

(g/mole)

flow

5823. 1.49 0.18 208. 279.20 277.70 282.90 4.61 108.91 C

6919. 1.66 0.25 208. 279.20 277.60 284.00 5.15 108.91 C

8079. 1.88 0.33 208. 279.30 277.50 285.50 5.72 108.91 C

9382. 2.15 0.44 208. 279.50 277.30 287.20 6.34 108.91 C

3041. 1.44 0.03 228. 280.20 278.70 282.00 3.00 108.91 C

6629. 1.83 0.10 228. 280.40 278.60 282.60 3.69 108.91 C

7431. 1.99 0.14 228. 280.50 278.50 283.80 4.03 108.91 C

9253. 2.29 0.23 228. 280.70 278.40 286.00 4.61 108.91 C

11460. 2.62 0.34 228. 280.90 278.30 287.80 5.15 108.91 C

14270. 3.00 0.47 228. 281.10 278.10 290.50 5.72 108.91 C

17960. 3.48 0.66 228. 281.30 277.90 293.90 6.34 108.91 C

6228. 1.70 0.09 308. 281.70 279.90 283.80 3.69 108.91 C

6990. 1.83 0.12 308. 281.70 279.90 285.00 4.03 108.91 C

8845. 2.11 0.19 308. 281.90 279.80 287.10 4.61 108.91 C

11200. 2.43 0.26 308. 282.00 279.60 289.00 5.15 108.91 C

14280. 2.81 0.36 308. 282.20 279.40 291.70 5.72 108.91 C

18410. 3.30 0.50 308. 282.40 279.10 295.20 6.34 108.91 C

3313. 1.76 0.03 304. 280.10 278.40 282.40 2.66 108.91 C

3782. 1.98 0.05 304. 280.30 278.30 283.30 3.00 108.91 C

9843. 2.64 0.11 304. 280.60 278.00 284.20 3.69 108.91 C

11990. 2.89 0.16 304. 280.80 277.90 286.40 4.03 108.91 C

15860. 3.38 0.28 304. 281.10 277.70 290.60 4.61 108.91 C

19670. 3.93 0.41 304. 281.40 277.40 294.40 5.15 108.91 C

23840. 4.60 0.59 304. 281.60 277.00 300.00 5.72 108.91 C

28680. 5.45 0.82 304. 281.90 276.50 306.50 6.34 108.91 C

2730. 1.59 0.01 414. 282.10 280.50 284.10 2.66 108.91 C

3083. 1.82 0.02 414. 282.20 280.40 284.70 3.00 108.91 C

8165. 2.52 0.07 414. 282.60 280.10 285.40 3.69 108.91 C

9160. 2.76 0.10 414. 282.80 280.10 287.10 4.03 108.91 C

12000. 3.28 0.16 414. 283.20 279.90 290.30 4.61 108.91 C

15930. 3.88 0.24 414. 283.50 279.60 293.10 5.15 108.91 C

21310. 4.64 0.35 414. 283.80 279.10 297.20 5.72 108.91 C

28760. 5.63 0.51 414. 284.10 278.50 303.20 6.34 108.91 C

9441. 2.35 0.04 203. 282.90 280.50 288.10 0.35 108.91 P

7528. 2.03 0.15 203. 282.50 280.50 286.40 0.97 108.91 P

5944. 1.75 0.23 203. 282.20 280.40 285.20 1.54 108.91 P

4642. 1.51 0.29 203. 281.80 280.30 284.10 2.06 108.91 P

14660. 3.49 0.19 221. 283.30 279.80 290.20 0.97 108.91 P

11320. 2.94 0.33 221. 282.60 279.70 287.90 1.54 108.91 P

8763. 2.46 0.43 221. 282.00 279.60 285.80 2.06 108.91 P

16980. 3.88 0.17 299. 284.50 280.60 291.90 0.97 108.91 P
44

12960. 3.18 0.29 298. 283.60 280.50 289.30 1.54 108.91P

9914. 2.60 0.38 298. 282.80 280.20 286.90 2.06 108.91P

7189. 1.98 0.45 298. 281.90 279.90 285.20 2.66 108.91P

6046. 1.67 0.48 299. 281.40 279.70 284.10 3.00 108.91P

16930. 4.04 0.09 397. 284.90 280.90 292.20 0.97 108.91P

12900. 3.26 0.18 397. 283.90 280.70 289.60 1.54 108.91P

9852. 2.61 0.25 397. 283.00 280.40 287.20 2.06 108.91P

7142. 1.93 0.30 397. 282.00 280.00 285.60 2.66 108.91P

6016. 1.59 0.33 397. 281.40 279.80 284.40 3.00 108.91P

5619. 1.68 0.09 216. 280.10 278.40 282.20 3.69 108.91C

6449. 1.84 0.12 215. 280.20 278.40 283.40 4.03 108.91C

8096. 2.15 0.21 215. 280.40 278.30 285.20 4.61 108.91C

9890. 2.49 0.31 215. 280.70 278.20 286.70 5.15 108.91C

12010. 2.87 0.43 216. 280.90 278.00 289.00 5.72 108.91C

14650. 3.34 0.59 216. 281.10 277.80 291.80 6.34 108.91C

3086. 1.49 0.04 303. 280.70 279.20 282.60 2.66 108.91C

3510. 1.68 0.05 303. 280.90 279.20 283.30 3.00 108.91C

8049. 2.22 0.11 303. 281.20 278.90 284.00 3.69 108.91C

9259. 2.40 0.15 303. 281.30 278.90 285.60 4.03 108.91C

12020. 2.80 0.24 303. 281.60 278.70 288.50 4.61 108.91C

15380. 3.27 0.34 303. 281.80 278.50 291.00 5.15 108.91C

19660. 3.86 0.48 303. 282.00 278.20 295.10 5.72 108.91C

25300. 4.63 0.68 303. 282.30 277.70 300.10 6.34 108.91C

8219. 2.47 0.06 406. 281.50 279.10 284.30 3.69 108.91C

9361. 2.77 0.09 406. 281.80 279.00 286.00 4.03 108.91C

12280. 3.40 0.16 406. 282.20 278.90 289.00 4.61 108.91C

16090. 4.12 0.24 406. 282.70 278.50 291.70 5.15 108.91C

21150. 5.00 0.35 406. 283.10 278.10 296.00 5.72 108.91C

28020. 6.15 0.51 406. 283.60 277.40 301.80 6.34 108.91C

2616. 1.55 0.02 413. 281.50 279.90 283.50 2.66 108.91C

3080. 1.82 0.03 413. 281.70 279.90 284.40 3.00 108.91C

8833. 2.59 0.07 413. 282.10 279.60 285.50 3.69 108.91C

9876. 2.85 0.11 413. 282.40 279.50 288.00 4.03 108.91C

13410. 3.43 0.18 413. 282.70 279.30 293.30 4.61 108.91C

18680. 4.13 0.27 413. 283.10 279.00 297.40 5.15 108.91C

26160. 5.01 0.40 413. 283.50 278.50 304.80 5.72 108.91C

36760. 6.18 0.60 413. 283.90 277.70 315.60 6.34 108.91C

12940. 3.01 0.04 205. 282.40 279.40 289.40 0.35 108.91P

10190. 2.57 0.18 205. 281.90 279.30 287.10 0.97 108.91P

7991. 2.20 0.29 205. 281.40 279.20 285.40 1.54 108.91P

6266. 1.89 0.37 205. 281.00 279.10 284.00 2.06 108.91P

4627. 1.56 0.44 205. 280.50 278.90 282.90 2.66 108.91P

3885. 1.40 0.47 205. 280.20 278.80 282.20 3.00 108.91P

16930. 4.04 0.09 397. 284.90 280.90 292.20 0.97 108.91P

12900. 3.26 0.18 397. 283.90 280.70 289.60 1.54 108.91P

9852. 2.61 0.25 397. 283.00 280.40 287.20 2.06 108.91P

7142. 1.93 0.30 397. 282.00 280.00 285.60 2.66 108.91P

6016. 1.59 0.33 397. 281.40 279.80 284.40 3.00 108.91P

18400. 4.74 0.14 399. 286.00 281.30 294.10 0.97 108.91P
45

14110. 3.84 0.24 399. 284.90 281.00 291.10 1.54 108.91P

10870. 3.08 0.31 399. 283.80 280.70 288.50 2.06 108.91P

7984. 2.28 0.37 399. 282.60 280.30 286.70 2.66 108.91P

6780. 1.88 0.40 399. 281.90 280.10 285.40 3.00 108.91P

5868. 1.58 0.11 214. 280.70 279.10 282.90 3.69 108.91C

6680. 1.71 0.15 214. 280.80 279.10 284.00 4.03 108.91C

8409. 1.95 0.24 214. 281.00 279.00 285.90 4.61 108.91C

10400. 2.21 0.34 214. 281.10 278.90 287.60 5.15 108.91C

12860. 2.52 0.47 214. 281.30 278.70 290.00 5.72 108.91C

16020. 2.91 0.65 214. 281.40 278.50 293.00 6.34 108.91C

3523. 1.54 0.04 301. 281.90 280.40 284.10 3.00 108.91C

7846. 2.03 0.10 301. 282.20 280.20 284.80 3.69 108.91C

8720. 2.21 0.14 301. 282.30 280.10 286.30 4.03 108.91C

11150. 2.58 0.23 301. 282.60 280.00 289.10 4.61 108.91C

14460. 3.01 0.32 301. 282.80 279.80 291.50 5.15 108.91C

18970. 3.54 0.46 301. 283.10 279.50 295.10 5.72 108.91C

25200. 4.23 0.65 301. 283.30 279.10 300.10 6.34 108.91C

3247. 1.75 0.03 398. 281.20 279.50 283.60 3.00 108.91C

8115. 2.46 0.07 397. 281.70 279.20 284.30 3.69 108.91C

9146. 2.71 0.10 397. 281.90 279.20 286.00 4.03 108.91C

11930. 3.25 0.17 397. 282.20 279.00 289.00 4.61 108.91C

15670. 3.88 0.25 398. 282.60 278.70 291.60 5.15 108.91C

20720. 4.66 0.36 397. 282.90 278.30 295.70 5.72 108.91C

27650. 5.68 0.53 398. 283.30 277.60 301.20 6.34 108.91C

7496. 2.03 0.09 212. 281.00 279.00 285.00 0.97 108.91P

5926. 1.75 0.17 212. 280.60 278.90 283.80 1.54 108.91P

4629. 1.52 0.22 212. 280.30 278.80 282.70 2.06 108.91P

10290. 2.74 0.14 210. 281.20 278.40 286.50 0.97 108.91P

8071. 2.33 0.25 210. 280.70 278.30 284.80 1.54 108.91P

6318. 1.99 0.33 210. 280.20 278.20 283.30 2.06 108.91P

4641. 1.64 0.39 210. 279.70 278.00 282.20 2.66 108.91P

3875. 1.46 0.42 210. 279.40 277.90 281.50 3.00 108.91P

20040. 4.89 0.05 299. 283.10 278.20 293.40 0.35 108.91P

15770. 4.02 0.20 299. 282.10 278.00 289.80 0.97 108.91P

12360. 3.29 0.32 299. 281.10 277.80 287.20 1.54 108.91P

9698. 2.67 0.40 299. 280.20 277.60 284.90 2.06 108.91P

7178. 2.04 0.48 299. 279.20 277.20 283.20 2.66 108.91P

17190. 4.05 0.08 412. 284.90 280.90 292.60 0.97 108.91P

13210. 3.25 0.17 412. 283.90 280.60 289.80 1.54 108.91P

10150. 2.58 0.23 412. 283.00 280.40 287.40 2.06 108.91P

7336. 1.89 0.29 412. 281.90 280.00 285.70 2.66 108.91P

6111. 1.54 0.32 412. 281.30 279.70 284.60 3.00 108.91P

11870. 2.18 0.55 212. 279.70 277.60 289.70 6.34 108.91C

8220. 1.91 0.11 303. 279.60 277.70 282.60 3.69 108.91C

9419. 2.08 0.15 303. 279.70 277.70 284.20 4.03 108.91C

12090. 2.47 0.24 303. 280.00 277.50 287.20 4.61 108.91C

15270. 2.92 0.34 303. 280.20 277.20 289.70 5.15 108.91C

19270. 3.50 0.48 303. 280.40 276.90 293.60 5.72 108.91C

24510. 4.26 0.67 303. 280.60 276.40 298.60 6.34 108.91C
46

8495. 2.17 0.07 390. 282.50 280.30 285.30 3.69 108.91C

9570. 2.40 0.11 390. 282.70 280.30 287.00 4.03 108.91C

12440. 2.90 0.18 390. 283.00 280.10 290.20 4.61 108.91C

16270. 3.49 0.27 390. 283.30 279.80 293.00 5.15 108.91C

21430. 4.23 0.38 390. 283.60 279.40 297.50 5.72 108.91C

28500. 5.20 0.56 390. 284.00 278.80 303.50 6.34 108.91C

7331. 1.59 0.07 205. 281.60 280.00 285.40 0.97 108.91P

5733. 1.34 0.15 205. 281.30 280.00 284.20 1.54 108.91P

21540. 4.74 0.03 306. 283.10 278.40 294.10 0.35 108.91P

16850. 3.83 0.20 306. 282.00 278.20 290.20 0.97 108.91P

13130. 3.05 0.31 306. 281.00 278.00 287.40 1.54 108.91P

10230. 2.41 0.40 306. 280.10 277.70 285.00 2.06 108.91P

7491. 1.74 0.48 306. 279.00 277.30 283.20 2.66 108.91P

16350. 3.56 0.10 401. 285.60 282.10 293.30 0.97 108.91P

12710. 2.81 0.18 401. 284.70 281.90 290.50 1.54 108.91P

9818. 2.18 0.25 401. 283.80 281.60 288.10 2.06 108.91P

7018. 1.51 0.31 401. 282.80 281.30 286.40 2.66 108.91P

10810. 1.85 0.43 201. 281.30 279.50 288.60 5.72 108.91C

13610. 2.17 0.59 201. 281.50 279.30 291.20 6.34 108.91C

3386. 1.45 0.04 304. 280.10 278.70 282.70 3.00 108.91C

8215. 2.01 0.10 304. 280.40 278.40 283.40 3.69 108.91C

9276. 2.20 0.14 304. 280.50 278.30 285.10 4.03 108.91C

11990. 2.60 0.23 304. 280.80 278.20 288.10 4.61 108.91C

15530. 3.07 0.33 304. 281.00 278.00 290.60 5.15 108.91C

20240. 3.64 0.47 304. 281.30 277.60 294.60 5.72 108.91C

26630. 4.39 0.68 304. 281.50 277.10 300.00 6.34 108.91C

8399. 2.08 0.06 408. 282.30 280.20 285.00 3.69 108.91C

9523. 2.33 0.10 408. 282.50 280.20 286.70 4.03 108.91C

12340. 2.85 0.16 408. 282.90 280.00 289.90 4.61 108.91C

15980. 3.47 0.24 408. 283.20 279.70 292.60 5.15 108.91C

20790. 4.23 0.35 408. 283.60 279.30 297.00 5.72 108.91C

27290. 5.23 0.51 408. 283.90 278.70 302.70 6.34 108.91C

10780. 1.91 0.01 196. 281.00 279.10 287.30 0.35 108.91P

8502. 1.52 0.14 196. 280.60 279.10 285.30 0.97 108.91P

20470. 4.66 0.07 303. 283.40 278.70 294.10 0.35 108.91P

16180. 3.78 0.23 303. 282.30 278.50 290.30 0.97 108.91P

12730. 3.04 0.34 303. 281.30 278.30 287.60 1.54 108.91P

10000. 2.41 0.43 303. 280.40 278.00 285.20 2.06 108.91P

17860. 4.35 0.13 389. 285.80 281.50 294.00 0.97 108.91P

13810. 3.51 0.23 389. 284.80 281.30 291.00 1.54 108.91P

10650. 2.81 0.30 389. 283.80 281.00 288.30 2.06 108.91P

7655. 2.09 0.37 389. 282.70 280.60 286.50 2.66 108.91P

6309. 1.72 0.40 389. 282.00 280.30 285.30 3.00 108.91P

4580. 1.42 0.11 209. 279.30 277.90 282.10 4.03 108.91C

5836. 1.59 0.18 208. 279.40 277.80 283.40 4.61 108.91C

6954. 1.78 0.25 209. 279.50 277.80 284.50 5.15 108.91C

8058. 2.00 0.33 209. 279.70 277.60 286.20 5.72 108.91C

9210. 2.29 0.44 209. 279.80 277.50 288.00 6.34 108.91C

5321. 1.56 0.11 210. 279.90 278.30 282.10 3.69 108.91C
47

084. 1.68 0.15 210. 280.00 278.30 283.20 4.03 108.91 C

7628. 1.91 0.23 210. 280.10 278.20 285.00 4.61 108.91 C

9333. 2.17 0.32 210. 280.30 278.10 286.40 5.15 108.91 C

11370. 2.48 0.44 210. 280.50 278.00 288.90 5.72 108.91 C

13930. 2.87 0.60 210. 280.60 277.80 291.70 6.34 108.91 C

12050. 3.00 0.05 196. 280.60 277.60 288.00 0.35 108.91 P

9460. 2.54 0.19 196. 280.10 277.50 285.70 0.97 108.91 P

7423. 2.14 0.29 196. 279.60 277.40 284.00 1.54 108.91 P

5855. 1.81 0.37 196. 279.10 277.30 282.70 2.06 108.91 P

4410. 1.46 0.44 196. 278.60 277.20 281.60 2.66 108.91 P

5483. 1.62 0.11 210. 279.90 278.30 282.20 3.69 108.91 C

6397. 1.75 0.15 210. 280.00 278.30 283.40 4.03 108.91 C

8045. 2.00 0.24 210. 280.20 278.20 285.20 4.61 108.91 C

9674. 2.27 0.33 210. 280.30 278.10 286.70 5.15 108.91 C

11460. 2.59 0.46 210. 280.50 277.90 289.20 5.72 108.91 C

13530. 2.97 0.61 210. 280.70 277.70 292.00 6.34 108.91 C

10410. 1.85 0.13 204. 282.60 280.80 288.30 0.97 108.91 P

8164. 1.47 0.24 204. 282.10 280.70 286.50 1.54 108.91 P
48

APPENDIX B3

Convective Boiling of R1234ze within a micro-fin tube

(file: lowgwpq.dat)

q” 

(Wm-2)

∆Ts

(K)

xq Gr

(kg m-2s

-1

)

Tw (K) Ts (K) Tf (K) z (m) Mw

(g/mole)

flow

5061. 1.40 0.11 199. 280.60 279.20 283.10 4.03 114.04 C

6562. 1.56 0.18 199. 280.60 279.10 284.60 4.61 114.04 C

8383. 1.77 0.26 199. 280.70 278.90 286.00 5.15 114.04 C

10700. 2.03 0.37 199. 280.80 278.70 288.00 5.72 114.04 C

13750. 2.38 0.53 199. 280.90 278.50 290.60 6.34 114.04 C

6370. 1.89 0.06 305. 281.40 279.50 283.60 3.69 114.04 C

7141. 2.05 0.10 305. 281.50 279.50 284.90 4.03 114.04 C

9508. 2.46 0.16 305. 281.70 279.30 287.20 4.61 114.04 C

12910. 2.98 0.24 305. 281.90 278.90 289.40 5.15 114.04 C

17630. 3.67 0.36 305. 282.10 278.40 292.70 5.72 114.04 C

24260. 4.61 0.54 305. 282.30 277.70 297.40 6.34 114.04 C

7103. 2.04 0.03 410. 284.30 282.30 286.20 3.69 114.04 C

7744. 2.30 0.06 410. 284.50 282.20 287.60 4.03 114.04 C

10380. 2.91 0.11 410. 284.90 282.00 290.30 4.61 114.04 C

14580. 3.67 0.18 411. 285.30 281.60 292.90 5.15 114.04 C

20720. 4.68 0.29 410. 285.60 280.90 296.80 5.72 114.04 C

29560. 6.04 0.45 410. 286.00 280.00 302.80 6.34 114.04 C

10040. 2.95 0.01 206. 281.30 278.40 286.50 0.35 114.04 P

7868. 2.36 0.12 206. 280.60 278.30 284.60 0.97 114.04 P

6165. 1.87 0.20 206. 280.00 278.10 283.40 1.54 114.04 P

15050. 3.61 0.13 309. 285.60 282.00 291.70 0.97 114.04 P

11730. 2.79 0.24 309. 284.50 281.70 289.30 1.54 114.04 P

9077. 2.10 0.31 309. 283.50 281.40 287.10 2.06 114.04 P

12940. 4.25 0.01 305. 284.60 280.30 290.10 0.35 114.04 P

10140. 3.33 0.10 305. 283.50 280.20 287.80 0.97 114.04 P

7961. 2.56 0.17 305. 282.50 280.00 286.20 1.54 114.04 P

6297. 1.92 0.22 305. 281.60 279.70 284.70 2.06 114.04 P

12280. 2.07 0.40 213. 280.70 278.70 288.70 5.72 114.04 C

16120. 2.53 0.57 213. 280.90 278.30 291.80 6.34 114.04 C

6049. 1.96 0.08 297. 279.40 277.50 282.00 3.69 114.04 C

7177. 2.09 0.11 297. 279.50 277.40 283.40 4.03 114.04 C

9733. 2.48 0.18 297. 279.70 277.20 285.60 4.61 114.04 C

12830. 3.00 0.26 297. 279.80 276.80 287.80 5.15 114.04 C

16750. 3.71 0.38 297. 280.00 276.30 291.00 5.72 114.04 C

21910. 4.72 0.55 297. 280.10 275.40 295.30 6.34 114.04 C

6748. 2.14 0.05 411. 285.60 283.50 287.70 3.69 114.04 C

7610. 2.33 0.07 411. 285.80 283.50 289.20 4.03 114.04 C

10400. 2.83 0.12 411. 286.10 283.20 292.00 4.61 114.04 C

14510. 3.48 0.19 411. 286.30 282.90 294.70 5.15 114.04 C

20290. 4.34 0.30 411. 286.60 282.30 298.80 5.72 114.04 C

28450. 5.53 0.45 411. 286.90 281.40 304.90 6.34 114.04 C
49

11460. 3.24 0.01 210. 283.90 280.60 289.50 0.35 114.04P

9093. 2.63 0.13 210. 283.20 280.50 287.40 0.97 114.04P

7182. 2.12 0.22 210. 282.50 280.40 286.00 1.54 114.04P

5656. 1.69 0.29 210. 281.90 280.20 284.60 2.06 114.04P

14760. 4.00 0.10 313. 287.60 283.60 293.50 0.97 114.04P

11370. 3.12 0.20 313. 286.50 283.40 291.20 1.54 114.04P

8792. 2.40 0.27 313. 285.50 283.10 289.00 2.06 114.04P

6460. 1.67 0.34 313. 284.30 282.60 287.40 2.66 114.04P

10150. 3.31 0.09 300. 283.60 280.20 288.00 0.97 114.04P

7983. 2.58 0.16 300. 282.60 280.00 286.40 1.54 114.04P

6302. 1.99 0.21 300. 281.80 279.80 284.90 2.06 114.04P

4638. 1.51 0.07 199. 279.10 277.60 280.90 3.69 114.04C

5368. 1.63 0.11 199. 279.20 277.50 281.90 4.03 114.04C

6950. 1.89 0.18 199. 279.30 277.40 283.50 4.61 114.04C

8802. 2.19 0.27 199. 279.50 277.30 284.90 5.15 114.04C

11100. 2.56 0.38 199. 279.60 277.10 287.20 5.72 114.04C

14080. 3.04 0.54 199. 279.80 276.70 290.00 6.34 114.04C

6196. 1.75 0.06 312. 280.90 279.20 283.00 3.69 114.04C

6921. 1.90 0.09 312. 281.00 279.10 284.30 4.03 114.04C

9062. 2.26 0.15 312. 281.20 278.90 286.50 4.61 114.04C

12080. 2.75 0.23 312. 281.40 278.60 288.50 5.15 114.04C

16250. 3.39 0.33 312. 281.50 278.10 291.80 5.72 114.04C

22060. 4.29 0.49 312. 281.70 277.40 296.20 6.34 114.04C

6817. 2.13 0.04 418. 283.80 281.70 285.80 3.69 114.04C

7568. 2.38 0.06 418. 284.00 281.70 287.30 4.03 114.04C

10180. 2.97 0.12 418. 284.40 281.40 290.00 4.61 114.04C

14120. 3.71 0.18 418. 284.70 281.00 292.50 5.15 114.04C

19730. 4.68 0.28 418. 285.10 280.40 296.50 5.72 114.04C

27710. 6.01 0.43 418. 285.50 279.50 302.40 6.34 114.04C

6920. 1.73 0.06 102. 279.60 277.80 284.30 0.35 114.04P

5519. 1.44 0.21 102. 279.20 277.80 282.90 0.97 114.04P

12640. 3.43 0.13 200. 282.80 279.40 288.90 0.97 114.04P

9919. 2.73 0.27 200. 281.90 279.20 286.70 1.54 114.04P

7747. 2.16 0.36 200. 281.10 278.90 284.70 2.06 114.04P

5632. 1.56 0.44 200. 280.20 278.60 283.00 2.66 114.04P

10380. 3.59 0.09 300. 282.20 278.60 287.00 0.97 114.04P

8307. 2.83 0.17 300. 281.20 278.40 285.30 1.54 114.04P

6636. 2.18 0.22 300. 280.30 278.20 283.70 2.06 114.04P

4989. 1.50 0.27 300. 279.30 277.80 282.40 2.66 114.04P

21120. 5.22 0.00 301. 287.10 281.90 296.80 0.35 114.04P

16580. 4.27 0.16 301. 285.90 281.60 292.80 0.97 114.04P

12870. 3.44 0.28 301. 284.80 281.40 290.00 1.54 114.04P

9862. 2.74 0.36 301. 283.80 281.10 287.50 2.06 114.04P

6879. 2.00 0.43 301. 282.60 280.60 285.70 2.66 114.04P

5456. 1.61 0.46 301. 282.00 280.40 284.60 3.00 114.04P

8354. 1.73 0.26 206. 280.30 278.50 285.70 5.15 114.04C

10380. 2.02 0.36 206. 280.40 278.30 287.80 5.72 114.04C

12970. 2.39 0.51 206. 280.50 278.10 290.40 6.34 114.04C

6403. 1.94 0.06 302. 281.10 279.10 283.30 3.69 114.04C
50

7228. 2.12 0.09 302. 281.20 279.10 284.70 4.03 114.04 C

9500. 2.55 0.16 302. 281.40 278.90 287.10 4.61 114.04 C

12600. 3.09 0.24 302. 281.70 278.60 289.20 5.15 114.04 C

16790. 3.81 0.36 302. 281.90 278.10 292.60 5.72 114.04 C

22580. 4.78 0.52 302. 282.10 277.40 297.20 6.34 114.04 C

6940. 2.21 0.05 404. 284.10 281.90 286.20 3.69 114.04 C

7755. 2.47 0.07 404. 284.30 281.80 287.70 4.03 114.04 C

10360. 3.07 0.13 404. 284.70 281.60 290.50 4.61 114.04 C

14150. 3.81 0.20 404. 285.00 281.20 293.10 5.15 114.04 C

19480. 4.79 0.30 404. 285.40 280.60 297.00 5.72 114.04 C

26980. 6.11 0.45 404. 285.80 279.60 302.80 6.34 114.04 C

6499. 1.65 0.05 103. 279.20 277.50 283.60 0.35 114.04 P

11870. 2.92 0.00 203. 282.30 279.40 288.70 0.35 114.04 P

9673. 2.35 0.14 203. 281.70 279.30 286.50 0.97 114.04 P

7790. 1.88 0.24 203. 281.00 279.20 284.90 1.54 114.04 P

6179. 1.49 0.31 203. 280.50 279.00 283.30 2.06 114.04 P

12490. 3.05 0.17 208. 283.70 280.60 289.60 0.97 114.04 P

9769. 2.55 0.30 208. 283.00 280.50 287.40 1.54 114.04 P

7474. 2.12 0.39 208. 282.40 280.30 285.40 2.06 114.04 P

5066. 1.67 0.46 208. 281.70 280.00 284.10 2.66 114.04 P

3848. 1.44 0.49 208. 281.20 279.80 283.30 3.00 114.04 P

10020. 3.49 0.07 296. 282.20 278.70 286.70 0.97 114.04 P

8076. 2.71 0.14 296. 281.20 278.50 285.00 1.54 114.04 P

6464. 2.07 0.19 296. 280.30 278.20 283.50 2.06 114.04 P

19900. 4.64 0.04 300. 286.70 282.10 296.40 0.35 114.04 P

15780. 3.71 0.19 300. 285.60 281.90 292.60 0.97 114.04 P

12380. 2.91 0.30 300. 284.50 281.60 289.90 1.54 114.04 P

9607. 2.24 0.38 300. 283.50 281.30 287.50 2.06 114.04 P

7115. 1.68 0.02 100. 281.90 280.20 286.40 0.35 114.04 P

10590. 3.00 0.02 203. 280.90 277.90 286.60 0.35 114.04 P

8544. 2.40 0.14 203. 280.20 277.80 284.50 0.97 114.04 P

6840. 1.90 0.23 203. 279.60 277.60 283.10 1.54 114.04 P

5435. 1.50 0.29 203. 279.00 277.50 281.80 2.06 114.04 P

13940. 3.62 0.05 204. 282.30 278.70 290.00 0.35 114.04 P

11250. 2.98 0.20 204. 281.60 278.60 287.40 0.97 114.04 P

8941. 2.45 0.32 204. 280.90 278.40 285.40 1.54 114.04 P

6974. 2.01 0.40 204. 280.20 278.20 283.60 2.06 114.04 P

4888. 1.56 0.47 204. 279.50 277.90 282.30 2.66 114.04 P