Beijing |
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Energy Savings % Indoor Vs. Window R/F |
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A/C is Off |
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Excluding Summer
Energy Savings |
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Definition of
Columns in the table: |
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B
= Average Outdoor
temperature (temperature of Window R/F's Condenser). |
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C
= Average Indoor
temperature, 70 F or higher (temperature of Indoor R/F's Condenser). |
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D
= Average temperature inside the R/F (set constant at 29 F). |
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Ti = C - D
= Temperature difference between the Indoor R/F's evaporator and
condenser. |
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Tw = B - D
= Temperature difference between the Window R/F's evaporator and
condenser. |
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G = Energy Savings % assuming that both R/Fs have the same COP
(efficiency). |
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G
= (Ti - Tw) / Ti
Unlike Column H, it does not include the higher efficiency of window R/F. |
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H = Energy Savings % taking into account the higher COP
(efficiency) of the window R/F. |
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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 |
25 |
70 |
29 |
41 |
-4 |
95% |
95% |
|
FEB |
33 |
70 |
29 |
41 |
4 |
90% |
95% |
|
MAR |
44 |
70 |
29 |
41 |
15 |
63% |
87% |
|
APR |
58 |
70 |
29 |
41 |
29 |
29% |
50% |
|
MAY |
69 |
70 |
29 |
41 |
40 |
2% |
5% |
|
JUN |
77 |
77 |
29 |
48 |
48 |
0% |
0% |
|
JUL |
80 |
80 |
29 |
51 |
51 |
0% |
0% |
|
AUG |
77 |
77 |
29 |
48 |
48 |
0% |
0% |
|
SEP |
68 |
70 |
29 |
41 |
39 |
5% |
10% |
|
OCT |
56 |
70 |
29 |
41 |
27 |
34% |
57% |
|
NOV |
41 |
70 |
29 |
41 |
12 |
71% |
91% |
|
DEC |
30 |
70 |
29 |
41 |
1 |
95% |
95% |
|
Average Energy Savings % |
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|
40% |
49% |
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Exact same as above
except in Celsius |
|
Celsius |
B |
C |
D |
Ti |
Tw |
G |
H |
|
JAN |
-4 |
21 |
-2 |
23 |
-2 |
95% |
95% |
|
FEB |
1 |
21 |
-2 |
23 |
2 |
90% |
95% |
|
MAR |
7 |
21 |
-2 |
23 |
8 |
63% |
87% |
|
APR |
14 |
21 |
-2 |
23 |
16 |
29% |
50% |
|
MAY |
21 |
21 |
-2 |
23 |
22 |
2% |
5% |
|
JUN |
25 |
25 |
-2 |
27 |
27 |
0% |
0% |
|
JUL |
27 |
27 |
-2 |
28 |
28 |
0% |
0% |
|
AUG |
25 |
25 |
-2 |
27 |
27 |
0% |
0% |
|
SEP |
20 |
21 |
-2 |
23 |
22 |
5% |
10% |
|
OCT |
13 |
21 |
-2 |
23 |
15 |
34% |
57% |
|
NOV |
5 |
21 |
-2 |
23 |
7 |
71% |
91% |
|
DEC |
-1 |
21 |
-2 |
23 |
1 |
95% |
95% |
|
Average Energy Savings % |
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|
40% |
49% |
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Exact same as above
except in Kelvin |
|
Kelvin |
B |
C |
D |
Ti |
Tw |
G |
H |
|
JAN |
269 |
294 |
271 |
23 |
-2 |
95% |
95% |
|
FEB |
274 |
294 |
271 |
23 |
2 |
90% |
95% |
|
MAR |
280 |
294 |
271 |
23 |
8 |
63% |
87% |
|
APR |
287 |
294 |
271 |
23 |
16 |
29% |
50% |
|
MAY |
294 |
294 |
271 |
23 |
22 |
2% |
5% |
|
JUN |
298 |
298 |
271 |
27 |
27 |
0% |
0% |
|
JUL |
300 |
300 |
271 |
28 |
28 |
0% |
0% |
|
AUG |
298 |
298 |
271 |
27 |
27 |
0% |
0% |
|
SEP |
293 |
294 |
271 |
23 |
22 |
5% |
10% |
|
OCT |
286 |
294 |
271 |
23 |
15 |
34% |
57% |
|
NOV |
278 |
294 |
271 |
23 |
7 |
71% |
91% |
|
DEC |
272 |
294 |
271 |
23 |
1 |
95% |
95% |
|
Average Energy Savings % |
|
|
40% |
49% |
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Back |
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Windowrefrigerator.com |
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PATENT PENDING |
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