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Old Jul 11th 2014, 10:45 AM   #1
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thermodynamics heat pump problem

The heat pump operates on freon 134a and follows a standard Carnot cycle. The condenser delivering heat to the room is supplied with saturated vapour at 30 ○C that is condensed to give saturated liquid also at 30C.
Assuming the air temperature is an average 15 C for a refrigerant flow of 0.02kg/s, calculate:

i) The heat delivered to the room

ii) The heat transferred from the air

iii) The work done by the compressor

iv) The coefficient of performance of the cycle and comment on your answer


v) If the air temperature drops by 5 degrees in a bad winter will the coefficient of performance of the cycle increase or decrease comment on your answer.
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