Seoul City, South Korea
Energy Savings % Indoor Vs. Window R/F
A/C is Off 
Excluding Summer Energy Savings
Definition of Columns in the table: 
B = Average Outdoor temperature (temperature of Window R/F's Condenser).   
C = Average Indoor Temperature, 70 F or higher (temperature of Indoor R/F's Condenser). 
D = Average temperature inside the R/F (set constant at 29 F). 
Ti = C - D = Temperature difference between the Indoor R/F's evaporator and condenser. 
Tw = B - D = Temperature difference between the Window R/F's evaporator and condenser.  
G = Energy Savings % assuming that both R/Fs have the same COP (efficiency).  
G = (Ti - Tw) / Ti   Unlike Column H, it does not include the higher efficiency of  window R/F. 
H = Energy Savings % taking into account the higher COP (efficiency) of the window R/F. 
H = 1 - (Tw x Tw) / (Ti x Ti)  Unlike column G, it includes the higher efficiency of window R/F. 
Fahrenheit B C D Ti Tw G H
JAN 28 70 29 41 -1 95% 95%
FEB 32 70 29 41 3 93% 95%
MAR 42 70 29 41 13 68% 90%
APR 55 70 29 41 26 37% 60%
MAY 64 70 29 41 35 15% 27%
JUN 72 72 29 43 43 0% 0%
JUL 78 78 29 49 49 0% 0%
AUG 79 79 29 50 50 0% 0%
SEP 70 70 29 41 41 0% 0%
OCT 59 70 29 41 30 27% 46%
NOV 45 70 29 41 16 61% 85%
DEC 33 70 29 41 4 90% 95%
Average Energy Savings %      40% 49%
Exact same as above except in Celsius
Celsius B C D Ti Tw G H
JAN -2 21 -2 23 -1 95% 95%
FEB 0 21 -2 23 2 93% 95%
MAR 6 21 -2 23 7 68% 90%
APR 13 21 -2 23 14 37% 60%
MAY 18 21 -2 23 19 15% 27%
JUN 22 22 -2 24 24 0% 0%
JUL 26 26 -2 27 27 0% 0%
AUG 26 26 -2 28 28 0% 0%
SEP 21 21 -2 23 23 0% 0%
OCT 15 21 -2 23 17 27% 46%
NOV 7 21 -2 23 9 61% 85%
DEC 1 21 -2 23 2 90% 95%
Average Energy Savings %      40% 49%
Exact same as above except in Kelvin
Kelvin B C D Ti Tw G H
JAN 271 294 271 23 -1 95% 95%
FEB 273 294 271 23 2 93% 95%
MAR 279 294 271 23 7 68% 90%
APR 286 294 271 23 14 37% 60%
MAY 291 294 271 23 19 15% 27%
JUN 295 295 271 24 24 0% 0%
JUL 299 299 271 27 27 0% 0%
AUG 299 299 271 28 28 0% 0%
SEP 294 294 271 23 23 0% 0%
OCT 288 294 271 23 17 27% 46%
NOV 280 294 271 23 9 61% 85%
DEC 274 294 271 23 2 90% 95%
Average Energy Savings %      40% 49%
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