HCFC-142b(R142b)397

2.43 HCFC-142b(R142b)
All equations for HCFC-142b(R142b) are based on the Table from Thermodynamic properties of refrigerants
by ASHRAE[1],[2].

2.43.1 Temperature Scale
International practical temperature scale 1968 (IPTS-1968)

2.43.2 The Names of Substance, Library File and Single Shot Program
Name of Substance:
Library File for UNIX:
Library File for DOS,Windows95/NT:
Single Shot Program for UNIX:
Single Shot Program for DOS,Windows95/NT:

HCFC-142b, R142b, Refrigerant 142b,Freon 142b, Chlorodiﬂuoroethane
libjr142b.a
JR142B.LIB
r142b-ss
R142B-SS.EXE

2.43.3 Important Constants and Others
Molecular Formula:
Relative Molecular Mass:
Gas Constant:

C2 H3 CF2
100.496
82.7347 J/(kg·K)

Critical Constants:
Critical Pressure:
Critical Temperature:
Critical Speciﬁc Volume:

4.123×10 6Pa (41.23 bar)410.25 K (137.10 ◦ C)
2.2988×10 −3m3 /kg

Reference State:
At 0◦ C, 1.0000 kJ/(kg·K) and 200.00 kJ/kg are assigned to the speciﬁc entropy and the speciﬁc enthalpy ofsaturated liquid, respectively.

2.43.4 Formula
Equation of State:
The Martin-Hou equation in reference [1] is used.
Vapor Pressure:
Equation (2.2.2) in reference [1].
Properties at Vapor-Liquid Equilibrium:
The saturated liquid density equation is obtained from Equation (2.2.4.d) in reference [1]. The saturated vapor
density is obtained by the compatibility of the equation of state and vapor pressure equation. Isobaric speciﬁcheat cP is obtained from individual in reference [2].
Transport Properties:
Thermal conductivity and viscosity from reference [2].
The Other Properties:
Surface tension from reference [2].

References[1] Thermodynamic Properties of Refrigerants(1986), 32 ASHRAE[2] Thermophysical Properties of Refrigerants (Inch-Pound Edition), (1993), 105 ASHRAE

398

P-PROPATH: Pure Substances and Mixtures with Fixed Composition
Table II–2.43–1

No.
1
94
8A
8B
82
8C
8D
2

Name of
Function
AIPPT(P,T)
AJTPT(P,T)
AKPD(P)AKPDD(P)AKPT(P,T)
AKTD(T)
AKTDD(T)
ALAPP(P)3

ALAPT(T)4

ALHP(P)

5

ALHT(T)

6

ALMPD(P)7

ALMPDD(P)8

ALMPT(P,T)

9

ALMTD(T)10

ALMTDD(T)

11
12
13
14
15
92
90
91
93
16

AMUPD(P)AMUPDD(P)AMUPT(P,T)
AMUTD(T)AMUTDD(T)BPPT(P,T)
BSPT(P,T)
BTPT(P,T)
BVPT(P,T)
CPPD(P)

17

CPPDD(P)18

CPPT(P,T)

19

CPTD(T)

20

CPTDD(T)R142b Function

Function and Argument(s)Range of Argument(s)ALAPP: Laplace Coeﬃcient [m]P∗: Pressure [Pa], [bar]
ALAPT: Laplace Coeﬃcient [m]T∗: Temperature [K], [◦C]
ALHP: Latent Heat of Vaporization [J/kg]
P∗: Pressure [Pa], [bar]ALHT: Latent Heat of Vaporization [J/kg]
T∗: Temperature [K], [◦C]
ALMPD: Thermal Conductivity of Saturated
Liquid [W/(m·K)]
P∗: Pressure [Pa], [bar]
ALMPDD: Thermal Conductivity of Saturated
Vapor [W/(m·K)]
T∗: Temperature [K], [◦C]
ALMPT: Thermal Conductivity at Ordinary
Pressure [W/(m·K)]
P∗: Pressure [Pa], [bar]T∗: Temperature [K], [◦C]
ALMTD: Thermal Conductivity of Saturated
Liquid [W/(m·K)]
T∗: Temperature [K], [◦C]
ALMTDD: Thermal Conductivity of Saturated
Vapor [W/(m·K)]
T∗: Temperature [K], [◦C]

4.697×103 ≤P≤0.2453×106 [Pa]0.04697≤P≤2.453 [bar]203.15≤T≤288 [K]−70≤T≤14.85 [◦ C]
4.697×103 ≤P≤3.3691×106 [Pa]0.04697≤P≤33.691 [bar]203.15≤T≤398.15 [K]−70≤T≤125 [◦ C]
15.65×103 ≤P≤1.7409×106 [Pa]0.1565≤P≤17.409 [bar]CPPD: Isobaric Speciﬁc Heat of Saturated
Liquid [J/(kg·K)]
P∗: Pressure [Pa], [bar]
CPPDD: Isobaric Speciﬁc Heat of Saturated
Vapor [J/(kg·K)]
P∗: Pressure [Pa], [bar]CPPT: Isobaric Speciﬁc Heat at Ordinary
Pressure [J/(kg·K)]
P∗: Pressure [Pa], [bar]T∗: Temperature [K], [◦C]
CPTD: Isobaric Speciﬁc Heat of Saturated
Liquid [J/(kg·K)]
T∗: Temperature [K], [◦C]
CPTDD: Isobaric Speciﬁc Heat of Saturated
Vapor [J/(kg·K)]
T∗: Temperature [K], [◦C]

15.65×103 ≤P≤1.7409×106 [Pa]0.1565≤P≤17.409 [bar]39.37×103 ≤P≤1.7409×106 [Pa]0.3937≤P≤17.409 [bar]P=Dummy273≤T≤473 [K]−0.15≤T≤199.85 [◦ C]
223.15≤T≤363.15 [K]−50≤T≤90 [◦C]
303.15≤T≤363.15 [K]30≤T≤90 [◦ C]

15.65×103 ≤P≤1.7409×106 [Pa]0.1565≤P≤17.409 [bar]P=Dummy263.15≤T≤473.15 [K]−10≤T≤200 [◦ C]
223.15≤T≤363.15 [K]−50≤T≤90 [◦C]
223.15≤T≤363.15 [K]−50≤T≤90 [◦C]

HCFC-142b(R142b)

399
Table II–2.43–1

No.
21

Name of
Function
CRP(‘A’)

7A
76
77
7B
78
2A
2B
22
2C
2D
89

CVPD(P)
CVPDD(P)
CVPT(P,T)
CVTD(T)
CVTDD(T)EPSPD(P)EPSPDD(P)EPSPT(P,T)
EPSTD(T)EPSTDD(T)FC(‘A’)

9A
96
95
9B
97
23

GAMPD(P)GAMPDD(P)GAMPT(P,T)
GAMTD(T)GAMTDD(T)HPD(P)

24

HPDD(P)71

HPS(P,S)

25

HPT(P,T)

26

HPX(P,X)

27

HTD(T)28

HTDD(T)

29

HTX(T,X)

84

IDENTF(‘A’)

R142b Function (cont’d)

Function and Argument(s)Range of Argument(s)CRP: Critical Constants
H: ‘A’=‘H’: 0.4309×106 [J/kg] Speciﬁc EnthalpyP∗: ‘A’=‘P’: 4.123×106 [Pa], 41.23 [bar] Pressure
S: ‘A’=‘S’: 1.6464×103 [J/(kg·K)] Speciﬁc EntropyT∗: ‘A’=‘T’: 410.25 [K], 137.10 [◦ C] Temperature
V: ‘A’=‘V’: 2.2988×10−3 [m3 /kg] Speciﬁc Volume

one of ‘H’, ‘P’, ‘S’, ‘T’ and ‘V’

FC: Fundamental Constants
M: ‘A’=‘M’: 100.496 Relative Molecular Mass
R: ‘A’=‘R’: 82.7347 [J/(kg·K)] Gas Constant

one of ‘M’ and ‘R’

HPD: Speciﬁc Enthalpy of Saturated Liquid [J/kg]
P∗: Pressure [Pa], [bar]HPDD: Speciﬁc Enthalpy of Saturated Vapor [J/kg]
P∗: Pressure [Pa], [bar]HPS: Speciﬁc Enthalpy [J/kg]
P∗: Pressure [Pa], [bar]S: Speciﬁc Entropy [J/(kg·K)]

4.697×103 ≤P≤3.3691×106 [Pa]0.04697≤P≤33.691 [bar]4.697×103 ≤P≤3.3691×106 [Pa]0.04697≤P≤33.691 [bar]10×103 ≤P≤3.50×106 [Pa]SPDD(P)≤S≤
SPT(P,453.15K) [J/(kg·K)]

HPT: Speciﬁc Enthalpy [J/kg]
P∗: Pressure [Pa], [bar]T∗: Temperature [K], [◦ C]

HPX: Speciﬁc Enthalpy of Mixture [J/kg]
P∗: Pressure [Pa], [bar]
X: Dryness Fraction [–]HTD: Speciﬁc Enthalpy of Saturated Liquid [J/kg]
T∗: Temperature [K], [◦ C]
HTDD: Speciﬁc Enthalpy of Saturated Vapor [J/kg]
T∗: Temperature [K], [◦ C]
HTX: Speciﬁc Enthalpy of Mixture [J/kg]
T∗: Temperature [K], [◦ C]
X: Dryness Fraction [–]IDENTF: CHARACTER TYPE FUNCTION
for Package Identiﬁcation (Length 20)
C: ‘A’=‘C’: ‘C2H3ClF2’ Molecular Formula
S: ‘A’=‘S’: ‘R142B’ Name of Substance
V: ‘A’=‘V’: ‘10.1’ Version Number

0.1≤P≤35 [bar]SPDD(P)≤S≤
SPT(P,180◦ C) [J/(kg·K)]
see Fig.II-2.43-3 for S
10×103 ≤P≤3.50×106 [Pa]TSP(P)≤T≤453.15 [K]
0.1≤P≤35 [bar]TSP(P)≤T≤180 [◦C]
see Fig.II-2.43-1
4.697×103 ≤P≤3.3691×106 [Pa]0.04697≤P≤33.691 [bar]0≤X≤1.0 [–]203.15≤T≤398.15 [K]−70≤T≤125 [◦C]
203.15≤T≤398.15 [K]−70≤T≤125 [◦C]
203.15≤T≤398.15 [K]−70≤T≤125 [◦C]
0≤X≤1.0 [–]one of ‘C’, ‘S’ and ‘V’400

P-PROPATH: Pure Substances and Mixtures with Fixed Composition
Table II–2.43–1

No.
66
68
85
86
81
87
88
99
30

Name of
Function
PLDT(T)
PMLT(T)
PRPD(P)PRPDD(P)
PRPT(P,T)
PRTD(T)
PRTDD(T)PSBT(T)
PST(T)72
73
31

PSTD(T)
PSTDD(T)SIGP(P)

32

SIGT(T)

33

SPD(P)34

SPDD(P)35

SPT(P,T)36

SPX(P,X)

37

STD(T)38

STDD(T)

39

STX(T,X)

67
69
64

TLDP(P)
TMLP(P)
TPH(P,H)R142b Function (cont’d)

Function and Argument(s)Range of Argument(s)PST∗: Saturation Pressure [Pa], [bar]T∗: Temperature [K], [◦C]

203.15≤T≤398.15 [K]−70≤T≤125 [◦ C]

SIGP: Surface Tension [N/m]P∗: Pressure [Pa], [bar]
SIGT: Surface Tension [N/m]T∗: Temperature [K], [◦C]
SPD: Speciﬁc Entropy of Saturated Liquid[J/(kg·K)]
P∗: Pressure [Pa], [bar]SPDD: Speciﬁc Entropy of Saturated Vapor[J/(kg·K)]
P∗: Pressure [Pa], [bar]SPT: Speciﬁc Entropy [J/(kg·K)]
P∗: Pressure [Pa], [bar]T∗: Temperature [K], [◦C]

4.697×103 ≤P≤0.2453×106 [Pa]0.04697≤P≤2.543 [bar]203.15≤T≤288 [K]−70≤T≤14.85 [◦C]
4.697×103 ≤P≤3.3691×106 [Pa]0.04697≤P≤33.691 [bar]SPX: Speciﬁc Entropy of Mixture [J/(kg·K)]
P∗: Pressure [Pa], [bar]
X: Dryness Fraction [–]STD: Speciﬁc Entropy of Saturated Liquid[J/(kg·K)]
T∗: Temperature [K], [◦C]
STDD: Speciﬁc Entropy of Saturated Vapor[J/(kg·K)]
T∗: Temperature [K], [◦C]
STX: Speciﬁc Entropy of Mixture [J/(kg·K)]
T∗: Temperature [K], [◦C]
X: Dryness Fraction [–]TPH∗: Temperature [K], [◦C]P∗: Pressure [Pa], [bar]H: Speciﬁc Enthalpy [J/kg]

4.697×103 ≤P≤3.3691×106 [Pa]0.04697≤P≤33.691 [bar]10×103 ≤P≤3.50×106 [Pa]TSP(P)≤T≤453.15 [K]
0.1≤P≤35 [bar]TSP(P)≤T≤180 [◦ C]
see Fig.II-2.43-1
4.697×103 ≤P≤3.3691×106 [Pa]0.04697≤P≤33.691 [bar]0≤X≤1.0 [–]203.15≤T≤398.15 [K]−70≤T≤125 [◦ C]
203.15≤T≤398.15 [K]−70≤T≤125 [◦ C]
203.15≤T≤398.15 [K]−70≤T≤125 [◦ C]
0≤X≤1.0 [–]10×103 ≤P≤3.50×106 [Pa]HPDD(P)≤H≤
HPT(P,453.15K) [J/kg]
0.1≤P≤35 [bar]HPDD(P)≤H≤
HPT(P,180◦ C) [J/kg]
see Fig.II-2.43-2 for H

HCFC-142b(R142b)

401
Table II–2.43–1

No.
6H
65

Name of
Function
TPH2(P,H)
TPS(P,S)R142b Function (cont’d)

Function and Argument(s)TPS∗: Temperature [K], [◦ C]
P∗: Pressure [Pa], [bar]S: Speciﬁc Entropy [J/(kg·K)]

Range of Argument(s)10×103 ≤P≤3.50×106 [Pa]SPDD(P)≤S≤
SPT(P,453.15K) [J/(kg·K)]
0.1≤P≤35 [bar]SPDD(P)≤S≤
SPT(P,180◦ C) [J/(kg·K)]
see Fig.II-2.43-3 for S

6S
98
70

TPS2(P,S)TPSEUP(P)TPV(P,V)

TPV∗: Temperature [K], [◦ C]
P∗: Pressure [Pa], [bar]V: Speciﬁc Volume [m3 /kg]

10×103 ≤P≤3.50×106 [Pa]VPDD(P)≤V≤
VPT(P,453.15K) [m3 /kg]
0.1≤P≤35 [bar]VPDD(P)≤V≤
VPT(P,180◦ C) [m3 /kg]

41
100
40

TRPL(‘A’)
TSBP(P)
TSP(P)

74
75
42

TSPD(P)TSPDD(P)UPD(P)43

UPDD(P)79

UPS(P,S)

44

UPT(P,T)45

UPX(P,X)

46

UTD(T)

47

UTDD(T)

48

UTX(T,X)

49

VPD(P)

TSP∗: Saturation Temperature [K], [◦ C]
P∗: Pressure [Pa], [bar]4.697×103 ≤P≤3.3691×106 [Pa]0.04697≤P≤33.691 [bar]UPD: Speciﬁc Internal Energy of Saturated
Liquid [J/kg]
P∗: Pressure [Pa], [bar]UPDD: Speciﬁc Internal Energy of Saturated
Vapor [J/kg]
P∗: Pressure [Pa], [bar]UPS: Speciﬁc Internal Energy [J/kg]
P∗: Pressure [Pa], [bar]S: Speciﬁc Entropy [J/(kg·K)]

4.697×103 ≤P≤3.3691×106 [Pa]0.04697≤P≤33.691 [bar]

UPT: Speciﬁc Internal Energy [J/kg]
P∗: Pressure [Pa], [bar]T∗: Temperature [K], [◦ C]

UPX: Speciﬁc Internal Energy of Mixture [J/kg]
P∗: Pressure [Pa], [bar]
X: Dryness Fraction [–]UTD: Speciﬁc Internal Energy of Saturated
Liquid [J/kg]
T∗: Temperature [K], [◦ C]
UTDD: Speciﬁc Internal Energy of Saturated
Vapor [J/kg]
T∗: Temperature [K], [◦ C]
UTX: Speciﬁc Internal Energy of Mixture [J/kg]
T∗: Temperature [K], [◦ C]
X: Dryness Fraction [–]VPD: Speciﬁc Volume of Saturated Liquid [m3 /kg]P∗: Pressure [Pa], [bar]4.697×103 ≤P≤3.3691×106 [Pa]0.04697≤P≤33.691 [bar]10×103 ≤P≤3.50×106 [Pa]SPDD(P)≤S≤
SPT(P,453.15K) [J/(kg·K)]
0.1≤P≤35 [bar]SPDD(P)≤S≤
SPT(P,180◦ C) [J/(kg·K)]
see Fig.II-2.43-3 for S
10×103 ≤P≤3.50×106 [Pa]TSP(P)≤T≤453.15 [K]
0.1≤P≤35 [bar]TSP(P)≤T≤180 [◦ C]
see Fig.II-2.43-1
4.697×103 ≤P≤3.3691×106 [Pa]0.04697≤P≤33.691 [bar]0≤X≤1.0 [–]203.15≤T≤398.15 [K]−70≤T≤125 [◦ C]
203.15≤T≤398.15 [K]−70≤T≤125 [◦ C]
203.15≤T≤398.15 [K]−70≤T≤125 [◦ C]
0≤X≤1.0 [–]4.697×103 ≤P≤3.3691×106 [Pa]0.04697≤P≤33.691 [bar]402

P-PROPATH: Pure Substances and Mixtures with Fixed Composition
Table II–2.43–1

No.
50

Name of
Function
VPDD(P)80

VPS(P,S)

51

VPT(P,T)52

VPX(P,X)

53

VTD(T)54

VTDD(T)

55

VTX(T,X)

8E
8F
83
8G
8H
56

WPD(P)WPDD(P)
WPT(P,T)WTD(T)WTDD(T)
XPH(P,H)57

XPS(P,S)58

XPU(P,U)59

XPV(P,V)60

XTH(T,H)

61

XTS(T,S)62

XTU(T,U)63

XTV(T,V)R142b Function (cont’d)

Function and Argument(s)Range of Argument(s)VPDD: Speciﬁc Volume of Saturated Vapor [m3 /kg]P∗: Pressure [Pa], [bar]VPS: Speciﬁc Volume [m3 /kg]P∗: Pressure [Pa], [bar]S: Speciﬁc Entropy[J/(kg·K)]

4.697×103 ≤P≤3.3691×106 [Pa]0.04697≤P≤33.691 [bar]10×103 ≤P≤3.50×106 [Pa]SPDD(P)≤S≤
SPT(P,453.15K) [J/(kg·K)]

VPT: Speciﬁc Volume [m3 /kg]P∗: Pressure [Pa], [bar]T∗: Temperature [K], [◦C]

0.1≤P≤35 [bar]SPDD(P)≤S≤
SPT(P,180◦ C) [J/(kg·K)]
see Fig.II-2.43-3 for S
10×103 ≤P≤3.50×106 [Pa]TSP(P)≤T≤453.15 [K]

VPX: Speciﬁc Volume of Mixture [m3 /kg]P∗: Pressure [Pa], [bar]
X: Dryness Fraction [–]VTD: Speciﬁc Volume of Saturated Liquid [m3 /kg]
T∗: Temperature [K], [◦C]
VTDD: Speciﬁc Volume of Saturated Vapor [m3 /kg]
T∗: Temperature [K], [◦C]
VTX: Speciﬁc Volume of Mixture [m3 /kg]
T∗: Temperature [K], [◦C]
X: Dryness Fraction [–]0.1≤P≤35 [bar]TSP(P)≤T≤180 [◦ C]
see Fig.II-2.43-1
4.697×103 ≤P≤3.3691×106 [Pa]0.04697≤P≤33.691 [bar]0≤X≤1.0 [–]203.15≤T≤398.15 [K]−70≤T≤125 [◦ C]
203.15≤T≤398.15 [K]−70≤T≤125 [◦ C]
203.15≤T≤398.15 [K]−70≤T≤125 [◦ C]
0≤X≤1.0 [–]XPH: Dryness Fraction [–]P∗: Pressure [Pa], [bar]H: Speciﬁc Enthalpy of Mixture [J/kg]
XPS: Dryness Fraction [–]P∗: Pressure [Pa], [bar]S: Speciﬁc Entropy of Mixture [J/(kg·K)]
XPU: Dryness Fraction [–]P∗: Pressure [Pa], [bar]U: Speciﬁc Internal Energy of Mixture [J/kg]
XPV: Dryness Fraction [–]P∗: Pressure [Pa], [bar]V: Speciﬁc Volume of Mixture [m3 /kg]
XTH: Dryness Fraction [–]T∗: Temperature [K], [◦C]
H: Speciﬁc Enthalpy of Mixture [J/kg]
XTS: Dryness Fraction [–]T∗: Temperature [K], [◦C]
S: Speciﬁc Entropy of Mixture [J/(kg·K)]
XTU: Dryness Fraction [–]T∗: Temperature [K], [◦C]
U: Speciﬁc Internal Energy of Mixture [J/kg]
XTV: Dryness Fraction [–]T∗: Temperature [K], [◦C]
V: Speciﬁc Volume of Mixture [m3 /kg]

4.697×103 ≤P<3.3691×106 [Pa]0.04697≤P<33.691 [bar]HPD(P)≤H≤HPDD(P) [J/kg]
4.697×103 ≤P<3.3691×106 [Pa]0.04697≤P<33.691 [bar]SPD(P)≤S≤SPDD(P) [J/(kg·K)]
4.697×103 ≤P<3.3691×106 [Pa]0.04697≤P<33.691 [bar]UPD(P)≤U≤UPDD(P) [J/kg]
4.697×103 ≤P<3.3691×106 [Pa]0.04697≤P<33.691 [bar]VPD(P)≤V≤VPDD(P) [m3 /kg]
203.15≤T<398.15 [K]−70≤T<125 [◦ C]
HTD(T)≤H≤HTDD(T) [J/kg]
203.15≤T<398.15 [K]−70≤T<125 [◦ C]
STD(T)≤S≤STDD(T) [J/(kg·K)]
203.15≤T<398.15 [K]−70≤T<125 [◦ C]
UTD(T)≤U≤UTDD(T) [J/kg]
203.15≤T<398.15 [K]−70≤T<125 [◦ C]
VTD(T)≤V≤VTDD(T) [m3/kg]

HCFC-142b(R142b)403[bar]*10 6 [Pa]
50

5

R142B

35

3.5

30

3

20

2

10

1

0.04

0.004
220
-53.15

or

pr

ess

ur e

cu

rv e

4

Va
p

Pressure, P

Critical point
40

300
26.85

408.15135453.15 [K]
180 [C]

Temperature, T
Fig.II–2.43–1

Range of Arguments(P,T) for AKPT(P,T),CPPT(P,T),CVPT(P,T),HPT(P,T),
SPT(P,T),UPT(P,T) and VPT(P,T).

404

P-PROPATH: Pure Substances and Mixtures with Fixed Composition[bar]*10 6 [Pa]
50

5

R142B

35
33.691

3.5
3.3691

K

4

20

2

10

1

0.04

0.004
140

.
408
T=

3

200

300

5K
T = 453.1

S aturated v

ura

ted

apor

liq

ui d

30

Sat

Pressure, P

15

40

Critical point

400

500

Enthalpy, H [J/kg]
Fig.II–2.43–2 Range of Arguments(P,H) for TPH(P,H).

580

*10

6

HCFC-142b(R142b)405[bar]*10 6 [Pa]
5

R142B

20

2

10

1

0.04

0.004
0.8

d liq
rate
Satu
1

1.5

5K

3

u id

30

T = 4 5 3 .1

3.5
3.3691

8 .1 5 K

35
33.691

T = 40

4

Pressure, P

40

Critical point

Sa tu ra te d va po r

50

2

Entropy, S [J/(kg.K)]
Fig.II–2.43–3

Range of Arguments(P,S) for HPS(P,S),TPS(P,S),UPS(P,S)
and VPS(P,S).

2.5 *103