Lawrence Berkeley Laboratory

1 Cyclotron Road Berkeley, Califomig 94720

(514) 486-40M • Fl'3 451-40M

ENERGY AND ENVIRONMENT DIVISION

ENERGY ANALYSIS PROGRAM

BUILDING 90 MAIL STOP 4000

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

DATE: vember 17 1, 9-94

TO: Ed Po11Qck

FAX Number: 202-586-461.Z -

202-586-577'8

Office or Location Phone Number

FROM: Greg Rosen Mist MS 90-4000 510-46851

Office or Location

ADDITIONAL INSTRUCTIONS

Phone Number

The following page provides information that is a follow up to our phone

conversation yesterday. Table 1 shows the impact of adding a time delay relay

(TDR) for the four split system product classes, The "Prey SEER" column lists

the SEER of the unit before the TDR is added and the "New SEER" column

lists the SEER of the unit after the TDR has been added. The percent change

in SEER is also provided. The percent change for the A/C classes is close to

4% while for the HP classes it is around 3%. The reason for the difference in

the impacts has to do with what we.discussed,.yesterday; namely,-that the..

reduction in the degradation coefficient (Cd) is a function of the SEER.

Because the TDR is-added at a later stage for the A/C classes, it has more of an

effect on the Cd and, thus, the SEER.

Table 2 and Figure 1 shows the Cd functions I used in the analysis. The "Cd

w/o Enhc" data are for units without TDRs or non-bleed TXVs while the "Cd

w/ Enhc" data are for units with TDRs or non-bleed TXVs.

Pages including this cover: __2

: TT

T0i 9t7 T "0N

220T VG/LT/

EE-RM-93-801 COMMENT 0EE

Lawrence Berkeley Laboratory 

1 Cyclotron Road Berkeley. California 94722,. 

(510) 486-4000 • FrS 451·4000 

ENERGY AND ENVIRONMENT DIVISION 

ENERGY ANALYSIS PROGRAM 

BUILDING 90 

FAX (510) 486-6996 

MAIL STOP 4000 

[FTS 451-6996] 

DATE: Noyember 17. 1994 

TO: Ed PolIQck 

FROM: Greg Bos~nguist 

FAX Number: 

Office ·or Location 

MS90-4000 

Office or Location 

202-586-461 Z 

202-586-5778 

Phone Number 

510-486-6861 

Phona NUmber 

ADDITIONAL INSTRUCTIONS 

Ed, 

The follOWing page provides information that is a follow up to our phone 

conversation yesterday. Table 1 shows the impact of adding a time delay relay 

(TDR) for the four split system product classes. The tlPrev SEER" column lists 

the SEER of the unit before the TOR is added and the "New SEER" column 

lists the SEER of the unit after the TDR has been added. The percent change 

in SEER is also provided. The percent change for the Ale classes is close to 

4% while for the HP classes it is around 3%. The reason for the difference in 

the impacts has to do with what we. discussed "yesterday; namely, that the··, ,.,,, , 

reduction in the degradation coefficient (Cd) is a fundi on of the SEER. 

Because the TOR is "added at a later stage for the Ale classes, it has more of an 

effect on the Cd and, thus, the SEER 

Table 2 and Figure 1 shows the Cd functions I used in the analysis. The "Cd 

w/o Enhc" data are for units without TDRs or non-bleed TXVs while the "Cd 

wI Enhc" data are for units with TORs or non-bleed TXVs. 

Pages including this cover: 2 

10~ £f71 'ON 
Table 1

Class Design C tion Pmv SEER SEER % SEER Chng Cd Prey Cd New Cat Diff

3-ton AC TDR 11.73 12.18 3.84% 0.134 0.063 0.071

5-ton AC 1DR 11.88 12.34 3.87% 0.137 0.065 0.073

3-ton HP TDR 10.83 11.17 3.14% 0.11.3 0.053 0.060

5-ton HP TUR 10.36 10.68 3.09° 0.102 0.048 0.054

Table 2

Cd wlo Enhc Cd WI Enhc

10.0 0.093 0.041

10.5 0.105 0.046

11..0 0.117 0.051

its 0.128 0.056

12.0 0.140 0.061

12.5 0.152 0.066

13.0 0.163 0.071

13.5 0.175 0.076

14.0 0.187 0.081

14.5 0.198 0.086

15.0 0.210 0.091

I

Figure T

0.250 T

0.200

Cd vs. SEER

0.050--^

0.000 . t

10.0 11.0 12.0 13.0 14.0 15.0

SEER

Cd w/o Enhc

I

u- Cd w/ Enhc

-^.... .. ..: of

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Table 1 

Class DesIgn Optron PrevSEER New SEER % SEER Chng CdPrev Cd New Cd Oiff 

3-ton AC TOR 11.73 12.18 3.84% 0.134 0.063 0.071 

5-ton AC TOR 11.88 12.34 3.87% 0.137 0.065 0.073 

3-too HP TOR 10.83 11.17 3.14% 0.113 0.053 0.060 

5-ton HP lDR 10.36 10.68 3.09% 0.102 0.048 0.054 

Table 2 Figure 1 

I 

I Cdvs.SEER I 

\ 0.250 T I 

I 

\ 0.200 + I 

I \ I 

\ 

Il 0.'50 I 1111 Cd w/o Enhc \ \ 

I I -D-- Cd wI Enhc 

0.100 .- I I 

_o--n .. --~- I 

\ . ~ :r-G 0.050 ~:::r-' I 

\ I I 

l 

0.000 . 

I 10.'0 11.0 12.0 13.0 14.0 15.0 

I 

SEER I 

SEER Cd wlo Enhc Cd wi Enhc 

10.0 0.093 0.041 

10.5 0.105 0.046 

11.0 0.117 0.051 

11.5 0.128 0.056 

12.0 0.140 0.061 

12.5 0.152 0.066 

13.0 0.163 0.071 

13.5 0.175 0.076 

14.0 0.187 0.081 

14.5 0.198 0.086 

15.0 0.210 0.091