## 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 9t7T "0N 220T VG/LT/ 

## Lawrence Berkeley Laboratory 1Cyclotron Road Berkeley. California94722,. (510) 486-4000 • FrS451·4000 

### 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 fundion of the SEER. Because the TOR is"added at a later stage for the 

### Ale classes, ithas 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 'ONTable 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 wl o 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

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SEER Cd w/o Enhc



# I u- Cd w/ Enhc

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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 

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1111 Cd w/o Enhc \ \ 

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# 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