### RONOLO 's OFTHE DOE RAe SIMULATION
1/04 AHAM ADVISED THAT LBL MUST AVE OUR RESPONSE ON THE REVISED SIMULATION MODEL BY 1/15. 1/08 DISK WITH REVISED MODEL RECEIVED BY AHAM AND DISTRIBUTED TO EVALUATION COMMITTEE. 1/1 6 COMMITTEE CONCLUDES STILL NOT READY. MODEL IS
1/1 LBL ADVISED OF FOUR ISSUES STI NEEDING RESOLUTION. /06 DISK WI H REVISED MOD L RECEI ED BY AHAM AND DISTRIBUTED TO EVALUATION COMMITTEE. 2/08 DEADLINE EXTENSION REQUESTED AND REJECTED, BUT LBL GIVEN UNTIL 2/15 TO RECEIVE MORE COST DATA. 2/28 FINAL COMMITTEE MEETING TO REVIEW R SULTS 

### 0 EST EVA ION. (ASSUME L /1 DEAD IN .)

AHAM PAGE 1 OF 6 4/07/94 

### RONOLO 's OFTHE DOE RAeSIMULATION UATION ELIN1991
1/04 AHAMADVISED THAT LBL MUST HAVE OUR RESPONSE ON THE REVISED SIMULATION MODEL BY 1/15. 1/08 DISK WITH REVISED MODEL RECEIVED BY AHAM AND DISTRIBUTED TO EVALUATION COMMITTEE. 1/16 COMMITTEE CONCLUDESTHAT MODEL IS STILL NOT READY. 1/1 LBL ADVISED OF FOUR ISSUES STI L NEEDING RESOLUTION. /06 DISKWITH REVISED MOD L RECEIVED BY AHAM AND DISTRIBUTED TO EVALUATION COMMITTEE. 2/08 DEADLINE EXTENSION REQUESTED AND REJECTED, BUT LBL GIVEN UNTIL2/15TO RECEIVE MORE COST DATA. 2/28 FINAL COMMITTEE MEETINGTO REVIEW RESULTS 

### 0 LATEST EVA ATION. (ASSUME L AD M 2/15 DEADLIN .)

AHAM PAGE 1 OF 6 4/07/94

### BASIC CONe IONS 0 NAL EVALUATION THE DOE RAC SIMULATION MODEL, 2/28/91

"THERE IS NO SPECIFIC DATA AVAILABLE AT THIS TIME TO JUDGE HOWWELLTHE SIMULATION MODEL CAN PREDICTTHE EFFECT OF DESIGN OPTIONS ON EFFICIENCY." THE TSD WILL NEED TO BE ANALYZED TO DETERMINE WHETHER THE PREDICTIONS MAD BY DOE ARE REASONABLE. HOPEFULLYTHERE WILL BE SUFFICIENT TIME WITHIN THE COMMENT PERIOD TO MAKE AN ADEQUATE ANALYSIS.

PAGE 2 OF 6 4/07/94 

### BASIC CONCLU IONSOF NALEVALUATION F THE DOE RAC SIMULATION MODEL, 2/28/91



### "THERE IS NO SPECIFIC DATAAVAILABLE ATTHIS TIMETO JUDGE HOWWELLTHE SIMULATION MODELCAN PREDICTTHE EFFECT OF DESIGN OPTIONS ON EFFICIENCY." THE TSD WILL NEED TO BE ANALYZEDTO DETERMINE WHETHERTHE PREDICTIONS MADE BY DOE ARE REASONABLE. HOPEFULLYTHERE WILL BE SUFFICIENTTIME WITHINTHE COMMENT PERIOD TO MAKEAN ADEQUATE ANALYSIS.

PAGE 2 OF 6 4/07/94DESIGN OPTIONS USED BY DOE TO ACHIEVE LEVEL 5 EER'S FOR RAe's Based on capacities & EER's from DOE simulation; see pages 1-24to 1-38 of TSD. VERAGE EFFECT OF DESIGN OPTIONS: No. of Average Change Design Option Classes Average EER Increase Capacity Power Applied To Btuh/watt Per Cent Per Cent Per Cent Subcooler 12 0.39 4.3% 1.6% -2.6% Grooved Tubes 7 0.33 3.5% 6.1 % 2.5%

Evap & Cond Grooved Tubes 3 0.12 1.1 % 0.7% -0.4% Cond only Enhanced Fins 4 0.37 4.5% 3.4% -1.1 % Evap & Cond PSC Fan Motor 4 0.59 6.8% 0.0% -6.3% Compressor EER Increase in unit EER 

### = 82% of increase in compressor EER (Classes 1 to 5) % increase in unit EER 

### = 89% of % increase in compressor EER
MINIMUM AND MAXIMUM EFFECT OF DESIGN OPTIONS: No. of Min./Max. Change Design Option Classes Min./Max. EER Increase Capacity Power Applied To Btuh/watt Per Cent Per Cent Per Cent Subcooler 12 0.27 2.9% 0.9% -3.5% 0.56 5.7% 2.4% -1.7% Grooved Tubes 7 0.20 2.1% 4.4% 2.1%

Evap &Cond 0.52 5.7% 8.5% 2.8% Grooved Tubes 3 0.09 0.8% 0.5% -0.4% Cond only 0.15 1.4% 0.9% -0.3% Enhanced Fins 4 0.22 2.7% 2.3% -2.3% Evap &Cond 0.51 6.4% 4.0% 0.4% PSC Fan Motor 4 0.54 6.4% -0.3% -7.1 % 0.64 7.4% 0.2% -5.9%
AHAM PAGE 3 OF 6 4/07/94 DESIGN OPTIONS USED BY DOETOACHIEVE LEVEL 5 EER'S FOR RAe's Based on capacities & EER's from DOE simulation; see pages 1-24to 1-38ofTSD. t\VERAGE EFFECT OF DESIGN OPTIONS: No. of Average Change Design Option Classes Average EER Increase Capacity Power Applied To Btuh/watt Per Cent Per Cent Per Cent Subcooler 12 0.39 4.3% 1.6% -2.6% Grooved Tubes 7 0.33 3.5% 6.1% 2.5%

Evap & Cond Grooved Tubes 3 0.12 1.1% 0.7% -0.4% Cond only Enhanced Fins 4 0.37 4.5% 3.4% -1.1% Evap & Cond PSC Fan Motor 4 0.59 6.8% 0.0% -6.3% Compressor EER Increase in unit EER 

### = 82% ofincrease in compressor EER (Classes 1to 5) % increase in unit EER 

### = 89% of % increase in compressor EER
MINIMUMAND MAXIMUM EFFECT OF DESIGN OPTIONS: No. of Min./Max. Change Design Option Classes Min./Max. EER Increase Capacity Power Applied To Btuh/watt Per Cent Per Cent Per Cent Subcooler 12 0.27 2.9% 0.9% -3.5% 0.56 5.7% 2.4% -1.7% Grooved Tubes 7 0.20 2.1% 4.4% 2.1%

Evap &Cond 0.52 5.7% 8.5% 2.8% Grooved Tubes 3 0.09 0.8% 0.5% -0.4% Cond only 0.15 1.4% 0.9% -0.3% Enhanced Fins 4 0.22 2.7% 2.3% -2.3% Evap &Cond 0.51 6.4% 4.0% 0.4% PSC Fan Motor 4 0.54 6.4% -0.3% -7.1% 0.64 7.4% 0.2% -5.9%
AHAM PAGE 3 OF 6 4/07/94

### KNOWN ISSUES AS OF4/07/94

NEED FOR LARGER SIZE CHASSIS TO MEET THE PROPOSED LEVEL 5 STANDARDS. AVAILABILITY OF 11.5 AND 12.0 EER COMPRESSORS. CLASSES FOR REVERSE CYCLE MODELS. FATE OF THE THROUGH-THE-WALL MODELS WITHOUT SIDE LOUVERS.

AHAM PAGE 4 OF 6 4/07/94 

### KNOWN ISSUESASOF

### 4/07/94

NEED FOR LARGER SIZE CHASSISTO MEETTHE PROPOSED LEVEL 5 STANDARDS. AVAILABILITYOF 11.5AND 12.0EER COMPRESSORS. CLASSES FOR REVERSE CYCLE MODELS. FATE OF THE THROUGH-THE-WALL MODELSWITHOUT SIDE LOUVERS.

PAGE 4 OF 6 4/07/94

### ANALYSES ALREADY INITIATED
TEST AND SIMULATION MODEL DATA TO COMPARE TO DOE'S PROJECTIONS FOR THE DESIGN OPTIONS. SURVEY TO DETERMINE THE EXTENTTO WHICH THE DESIGN OPTIONS ARE ALREADY BEING USED. EVALUATION OF ACTUAL VERSUS RATED COMPRESSOR PERFORMANCE. DATA ON EER LOSS DUE TO REVERSING VALVE IN REVERSE CYCLE MODELS. REVIEW OF MANUFACTURERS' COST FOR DESIGN OPTIONS.

AHAM PAGE 5 OF 6 4/07/94 

### ANALYSES ALREADY INITIATED
TESTAND SIMULATION MODEL DATATO COMPARE TO DOE'S PROJECTIONS FOR THE DESIGN OPTIONS. SURVEYTO DETERMINETHE EXTENTTO WHICH THE DESIGN OPTIONSARE ALREADY BEING USED. EVALUATION OF ACTUALVERSUS RATED COMPRESSOR PERFORMANCE

. DATAON EER LOSS DUE TO REVERSING VALVE IN REVERSE CYCLE MODELS

. REVIEW OF MANUFACTURERS' COST FOR DESIGN OPTIONS.

AHAM PAGE 5 OF 6 4/07/94

### PROPOSED ANALYSES
DATA ON EER LOSS DUE TO REMOVAL OF SIDE LOUVERS. EFFECT OF DOE PROJECTIONS ON LATENT COOLING CAPACITY. SURVEY TO DETERMINE THE NUMBER OF BASIC MODELS IN WHICH REFRIGERANT CHARGE IS ALREADY AT THE LIMIT OF COMPRESSOR MANUFACTURERS SPECIFICATIONS.

AHAM PAGE 6 OF 6 4/07/94 

### PROPOSED ANALYSES
DATA ON EER LOSS DUE TO REMOVAL OF SIDE LOUVERS. EFFECT OF DOE PROJECTIONS ON LATENT COOLING CAPACITY. SURVEYTO DETERMINETHE NUMBER OF BASIC MODELS IN WHICH REFRIGERANT CHARGE IS ALREADYATTHE LIMITOF COMPRESSOR MANUFACTURERS SPECIFICATIONS.

AHAM PAGE 6 OF 6 4/07/94