Lawrence Berkeley Laboratory

1 Cyclotron Road Berkeley, California 94720

(510) 456- s F rS 451-4000

AND ENVIRONMENT DIVISION

ENERGY ANALYSIS PROGRAM

BUILDING 90 MAIL STOP 4000

FAX (510) 486-6996 [ITS 451-6996]

DATE: July24_1995

FAX Number: 202-566-4617

TO: Michael Raymond 202-566-9511

Office or Location Phone Number

FROM: Gre m=ist 510-486-6651

Office or Location Phone Number

ADDITIONAL INSTRUCTIONS

Michael,

Attached are figures showing comparisons between MODCON

simulation results and manufacturer test data for 10 and 12 SEER split system

air conditioners and heat pumps. In each figure there are BEFORE and

AFTER comparisons. The BEFORE and AFTER labels designate the

comparisons that were made before and after certain modifications were

made to the MODCON simulation model. The last 2 pages of this fax describe

the modifications that were made to MOOCON and the guidelines used to

conduct simulation runs after the modifications were made.

It is no coincidence that simulation results compare most favorably with

test data submitted by Manufacturer A. Manufacturer A's data submittal was

by far the most detailed and complete. It is also interesting to note that the

MODCON simulation model seems to do a better job at simulating the

performance of air conditioners. Please give me; a call or drop me an e-mail

once you've had time to digest this material.

Pages including this cover:

EE-RM-93-801 COMMENT 0HH

« C 

DATE: 

TO: 

FROM: 

Lawrence Berkeley Laboratory 

1 Cyclotron Road Berkeley, California 94720 

(510) 486-4000 • FrS 451-4000 

ENERGY AND ENVIRONMENT DIVISION 

ENERGY ANALYSIS PROGRAM 

BUILDING 90 

FAX (510) 486-6996 

Jyly 24. 1995 

Michael Raymond 

Greg Ro§enguist 

MAIL STOP 4000 

[FrS 451-6996] 

FAX Number: 202-586-4617 

Office or Location 

Office (l)r Location 

202-586-9611 

Phone Number 

510-486-6851 

Phone Number 

ADDITIONAL INSTRU,CTIONS 

Michael, 

Attached are figures showing comparisons between MODCON 

simulation results and manufacturer test data for 10 and 12 SEER split system 

air conditioners and heat pumps. Ih each figureithere are BEFORE and 

AFTER comparisons. The BEFORE and AFTER labels de~ignate the 

comparisons that were made before and after certain modifications were 

made to the MODCON simulation modeL The la$t 2 pages of this fax describe 

the modifications that were made to MODCON and the guidelines use~ to 

conduct simulation runs after the modifications: were made. 

It is no coincidence that simulation results compare most favorably with 

test data submitted by Manufacturer A. Manufacturer A's data submittal was 

by far the most detailed and complete. It is also interesting to note that the 

MODCON simulation model seems to do a better job at simulating the 

performance of air conditioners. Please give me.a call or drop me an e-mail 

once you've had time to digest this material. 

Pages including this cover: 11 
20.0% ----------------------------- ------------ ,------------------------------------- -----

15.0

10.0%

-----------------------------------------

-------------------------------------

-----------------------------------------

F Capacity

-10.0%

-15.0% -----------------------------------------

-20.0% -------------------- - - - - - - - - - - - - - - - - - - - -

--------------------------------

fore after before after

10 EE!E-95°

0f^ Comp Pow

EE-RM-93-801 COMMENT 0HH

Comparison of Simulation Results to Test Data 

anufa urer A ... Split System Air Conditioners 

20.0% i- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -,- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ~ : ; 

; 

15.0% 

10.0%' T- -------------- ------------.- ---------. ---. -. _ .. --. ----------------- --- ----. ----! 

~ i 

o 

c I 

! 5.00/0 -- -+-------------------- -------------------

! 

-

Q .. 0.00/0 --+----

~ Comp Pow 

: 

-10.00/0 _ _ _ ~ _ _ _ ___ ~ _ _ ~ __ .. ~ • • • _ ~ _____ • _ _ _ _ _ _ _ • 8 _._ _ __ ~ __ .. _ _ _ _ _ _ _ _ _ _ • • ____ • _ ~ _ _ • • _ _ _ ~ __ _ 

I 

-15.00/0 -!-- --- -- -------. --- --. -----. -----------. -- ------.. -. ---------------------------- j i 

-20.0% 1......... . .................................................................... , 

before after before after 

10 SEER .. gsof 12 SEER .. S5°f 
! y : ^i1 1 l Resufllz to J:O20.0% ---------------------------- ------------ ----- -------------------------------

lore after before after before after

10 SEE °F 10 SEER-47°F 10 SEER®17°F

EER

Comp Pow

before after before after before after

12 SE R 95 12 SEER-47°F 12 SEER-170F

1- 1 Capacity

EE-RM-93-801 COMMENT 0HH

Comparison of Simulation Results to Test Data 

Manufacturer A an Split System Heat Pumps 

20.00/0 T- ------_. _ .. _.:' -----_. ------ ... ---.' --. T'" -' . ---_. -. ---. _. , -_ .. ---1- -- --. --\ • Capacity . . , : i ! 'cV 

, ! . III EER 

15.0% . - . - - - - , • - - • - - - - - - - - - - •• - •• - - - - - - - - - - - - - - .' ••• - • - - - -c , , 

10.00/0 

5.00/0 ~. __ ~h ____________________ • _ ___ ~._. _________ h ____ .~_~_ .. _ 

, 

0.00/0 

-... ---- - .... - - . - - ... - - --.. - - ..... -. --. - -- - -- , 

-10.00/0 , -------.---- -------_.-._.- -. ____ ow_wow ______________ ... __________________________ ;_ •• ___________ , 

-15.00/0 I. -. ------------... ----. -------...... --- --...... --. ,. -' ---------.. --.. --. -. -. _. ' .. ---... --. --I 

-20.0% L - --- - ----- --.. - - - --... .........1 

before after before after before after 

10 SEER-95°f 10 SEER-47°f 10 SEER-17°F 

before after before after before after 

12 SEER-9sof 12 SEER-47°F 12 SEER-17°F 
before after before after before after before after before after before after

10 i A°F 1 0 SE R47°F 1O ®17°F 12 °F 12 7°F 12 417°F

EE-RM-93-801 COMMENT 0HH

CD 

() 

c 

! 

G) 

;: 

" .... 

Comparison of Simulation . Results to st Data 

anufacturer B .. Split System Heat Pumps 

20.00/0 T''''' 

~' 

- - ,- -, ", .. ,.' .,' ... , - _. - - - - -, - -

:' 

-: ..... ,. - _ ... -., ,-., .. ,-, -" ., .... , - _., , - , - -

Capacity 

EER 

15.00/0 JJ Camp Pow 

10.00/0 

5.0% 

, .. C .... 0.0% 

.., 

c: 

CD 

~ -5.0% ~ ~ • - - ~ ••• - - ~ - - ~ - - - - - - - - - _ _ _ _ •••• _ _ _ _ _ _ _ _ ... _________ F _ _ • _____________ .: ____ ~ _ _ _ _ _ _ _ _ _ • _ ... _________ _ 

CD 

Om. 

-10.0% i 

. . , - - - - . , - , . -1 . - - . . . . . , ' . , .. - _. - - - ... , . . " - . . . , . . . . . .. - - - - - , , - , , , .... ' , ... , - , , ' , , - . : - - . , , . - , .. ' , . -

-15.0°h, . ' , . , . ' , --. -. , . -, -' ., .. , . .. ., .. ,', .. " .. ,. -' . , . -- -, .. , , .... ,' .. ------. ..,' ---, , . '1' . , , ... - -, -. , 

-20.0% i _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _l_ _ 

before after before after before after 

10 SEER-95°F 10 SEER-47°F 10 SEER-11°F 

before after before after before after 

12SEER-9S°F 12 SEER-47°F 12 SEER .. 17°F 
1%ult 1',^

Lid z (` v^^^rk`;v}C^O^(11

10.0% ---------- I ---------------------------

5.0°/a 1----------- I-----------------------------------------

0.0%

-5.0% ---- ---------------------------------- -----

-10.0% ----------------------------------------------------

-15.0%lm -------------- -------------------- ....... -----------------------

1--------------------------------------------------- .. - - - - - - -----

before after

10 °

F

before after

12 SEER-9511F

EE-RM-93-801 COMMENT 0HH

CD 

U 

C 

CD 

lim 

CD 

... == --Q 

..... 

c 

CD 

U 

1-

(I) 

Q., 

Comparison of Simulation Results to Test ata 

anufacturer B .. Split System Air Conditioners 

20.0% T ---... -.. --. . ..... -. . . . . . . . . .. . . . .. . .................. -. . . -. . . . .. -. 

15.0% -t- ------. -------- --------------------- ------- ------------------------------, ! ' ~. 

10.0%1 

5.0% 

0.0% 

-5.0% 

-10.00/0 

-15.00/0 ------------. - ---- -------- ------.. --------------------------------------------

-20.00/0 " ------------------------------ --- -------------. --------.. ---------. --. --------

before after before after 

1 «1 SEER-95QF 12 SEER-95°F 

• Capacjty 

EEA 

~ Comp Pow-
L Capacity

PER,

F", Comp Pow

before after

0 SEER-950F

before after

12 SEE --95°F

EE-RM-93-801 COMMENT 0HH

20.0% 

15.0% 

Comparison of Simulation Results to Test Data 

Manufacturer D ... Split System Air Conditioners 

.--. ----------------.------.---.... ---1---··-····-------- -.. -- ... --------- -- .. : 

I ~ 

.... --------------- .. --.- .. --.-- --- ---!------- .. ---------- ---.- .. -------------.J 

10.0% T- ----. ------------............ --. -----. -....... -------------. -. -------- ----.. 

~ ! 

ii 

t 

~ •• Q 

5.0% +-

0.0% 

1 J. -5.0% 

~ i 

-10.0% ... - -. -. - -- . --............ ------.. -. -I ...... --.. -----.. -.. --. -.... - ---. -. ---.. 

i ~ ::': 1 ~ ~ ~ ~ ~ ~ •••.•••••.••••••• ~ ~ •• ~ ~ •• ~ •. • •. • .•• ••••••••••••••••.••••••• ~ ~ ~ ••••••••.•.•• j 

before after before after 

10 SEER-9SO F 12 SEER-9.5°F 

Capacity 

... ·EER ~~ ............... . 

~ CompPow 
uompanson t o U : s I-Data

i System Fe P ,-,

20.0% - ------------ ----------- ---------

before after before after before after

IO SEER-95°F f.O SE -47'°F 14 E-17°F

before after before after before aftff

12 SEER-95°F 12 470E lZ S R-17°F

EE-RM-93-801 COMMENT 0HH

Comparison of Simulation Results to Test Data 

Manufacturer D ... Split System Heat Pumps 

20.0% -.. - --- --- ---- _ .. - ------ ---- --. ------.. '.01 . -- - -... - . -. -- . --.. - - - . . . . . . paclty 

DIlEER 

15.0% ........ -... -.. -. -. _. . ---- _ ... --- --. -- -----. ---.... - . -. -. -----.... - iii Comp Pow 

10.0% - -- ------ ----.. ---------- ---

5.0% 

0.0% 

M .1. __ . _________ ~ ~ _____ . ____ . _ _ _ _ _ _ _ _ ______ . ________ _ 

-10.0% ____________ ! ..... ___ L ' 

-15.0% --. -.... - --- --. -. - -.. --. -" "- --. - . --... -------. -.. ---- . -. -. - --. -. ---..... . 

-20.0%- 1". ------. --. j -. ------------ _. -------------. -.. -. ---. ---... -.. ---------. --.... -.. -- before after before after before after 

10 SEER-9S~F' 10. SEER47°F 10 SEER-17°F 

before after bef()re after before after 

U SEER.-95°F 12 SEER4rF 12 SEER-17°F 
10-4 0

I iii , mulation r <_` s r

® s '•f,::^L- _ .f.1 (`fie Air® C - l( f firs Fr i

20.0% ------------------------------------------- ,--------------------------------- --------

15.0%

0.0%

5.0%

Capacity

0.0%

-10.0%

-15.0%

-20.0%

-------------

- - - - - - - - - - - - - - - - - - - - - - - - - - -------- 4 - - - - - - - - - - - - - - - - - - - - - - - - - - - ....__.

^- ..__..------. -- ......_.

before after before after

10 SEE °F 13 SEER-95"F

i

R

Comp Pow

EE-RM-93-801 COMMENT 0HH

....... 

Comparison of Simulation Results to Test Data 

Manufacturer J - Split System Air Conditioners 

20.0% T- - - - - - - - - - - - - " - - - . - - - - - - - - . - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - _. - - - - - --

i 

15.0% +--

r 

10.0% tf 

~ 

, 

; 

5.0% ;-

0.0% 

§ j L.« -5.0% +- ------------------------- - ---. --. -. -.. ------ &! I 

-10.0% -- -----.. -... - . --... --. -- -----" " " -" " -_.. . - --.. -.. --... -.. - . -. - -. " ... " " " " ... " .. -.. ". 

! 

i 

, . 

-15.0% 1--. ----. " --. ---" " ... " ." " " " .--" " --.. -" -.-j -----. --------. ----. --. -" . --" -" --.... --.. ~ 

-20.0% . ... .. . ................................ 1... .. . . . . .. . ............................ ! 

before after 

to SEER ... 95°F 

• Capacity 

EER 

~ CompPow 
Comparison of Shnulati9

on Results

Manufacturer j

® Split System Heat ^^.

-10.0% f f--------------I ---- E--- --

- s.0% -- ------------ - - - - - - - - - - - - E I _... - -----------

-20.0% = ------I ------- --------------1-------- --------- -------

before after before after before after before after before after before after

10 SEER-9SOF 10 SEER47°F 10 SEER-17°F 13 SEE ®95°F 13 SEE °F 13 SEER-17°F

EE-RM-93-801 COMMENT 0HH

~ 

iJ 

;... 

.. ~ 

Q 

Comparison of Simulation Results to Test Data 

Manufacturer J - Split System Heat Pumps 

20.0% t· --_ ..... _ .. '1' ... -- - .. ---

i 

15,0% ............ j 

; 

10.0% 

5.0% 

........ ·1· - . ! 

- w • - • - • f ---..... ff ~ _ ........... r----LI ________ ____ 

• Capacity , 

i 

i!lEER 

~ CompPow 

r ... . ........ -~. --

! 

-. -! 

'S 

e 

IIaoI -5.0% ........... - ... _.' . _ ........ , 

~ 

-10.0% .... -- ................... . - - - . - • • . -j - - - - • • - - - - - - - - - - - - - - - - - - - - . 

i 

-15.0% _."." -. . . . . .. ...... .". -. . .. ........ . .. -....... -. .. -. . -. .. - _.... . .. -- .. -. -. _. - ... " . 

I i I 

i ; i I I . 

-20.0% ~ .......... -.. - -- . ---...... l . . . . . . . .. . ... -............ 1 .... - - - - .............. - - .... " - ..... . 

before after before after before after 

10 SEER-95°F 10 SEER-47<>F 10 SEER· 17°F 

before after before after before after 

13 SEER-9soF 13 SEER47°F 13 SEER·17()F 
.! e a - Ass uopolnoleo

1 1

! dow -g ppi Ou . mR ISGIAoLt 05) 06-0 slyanb3

0 p 's nb 1

- O!!

-!!

A41oodm [ ,7p uoijoemoC)

EE-RM-93-801 COMMENT 0HH

Modifications to Simulation odel 

• Correction Factors applied to reduce calculated capacity 

.. Equals 0 .. 95 @ 95°F test condition 

• Equals 0 .. 95 @ 82°F test condition 

• Equals 0 .. 94 @ 47°F test condition 

• Equals 0 .. 90 @ 17°F test condition 

• ARI map ... fiDing correlations used to model compressor (ARB Standard .. ·S-40· ... 91l· 

• Option to specify unit capacity 

.. New Suction Une Pressure Drop calculation (AP=cm1 .. 8) 
Cl

Ai U° ) i

JI 11 l r f n i ®._i psi

a Suction Line AP for 3-ton units 0 650 Ibm/hr = 3.5 psi

-9 HSA Ll -)

7

® Indoor Coll I,^sx - Si

o i ? E psi

Heati ng Mods determined by simulation s

® Outdoor it Refrigerant-Side = 3 ®5 Tb

is Line 3-ton i /i = 4.5 psi

EE-RM-93-801 COMMENT 0HH

uidelines for Conducting Simulation Runs 

.. Air Conditioners 

.. Evaporator Coil Refrigerant-Side &P = 3 psi 

.. Condenser Coil Two-Phase Refrigerant-Side AP = 5 psi 

.. Suction line AP for 3 .. ton units @ 550 Ibm/hr = 3 .. 5 psi 

1\ Heat Pumps 

«& Indoor Coil R'eftigerant-Slde ~p 

«& Cooling Mode = 3 psi 

• Heating Mode = determined by simulation model 

• OutdoorCoU Refrlgerant--Side ~p = 3 .. 5 psiII Suction line AP for 3-ton units @ 550 Ibm/hr :: 4 .. 5 psi