-
An industrial heat pump operates between the temperatures of 27°C and -13°C. The rates of heat addition and heat rejection are 750 W and 1000 W, respectively. The COP for the heat pump is
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- 7.5
- 6.5
- 4.0
- 3.0
Correct Option: C
Heat addition, Q2 = 750 W
Heat rejected, Q1 = 1000 W
| [C.O.P]H.P = | = | |||
| W | Q1 - Q2 |
| = | = | = 4 | ||
| 1000 - 750 | 250 |
T1 = 273 + 27º = 300ºK
T2 = 273 – 13 = 260K
| [C.O.P]H.P = | ||
| Q1 - Q2 |
for actual heat pump
| = | = | = 4 | ||
| 1000 - 750 | 250 |
