Consider a residential heat pump that uses lake water as the heat source in the winter...

Consider a residential heat pump that uses lake water as the heat source in the winter and as heat sink inthe summer. The house is to maintained at a winter temperature of T= 18 degrees C and a summer temperature of T= 25 degrees C. To do this efficiently, it is found that the indoor coil should be at T= 50 degrees C in the winter and T= 5 degrees C in the summer. The outdoor coil temperature can be assumed to be T= 5 degrees C during the winter months and T= 35 degrees C during the summer. Using R-134a as the working fluid.

For the winter months,

(a) The coefficient of performance for a Carnot heat pump cycle operating at the given temperatures.

(b) Determine the temperature and pressures at the principal states of the cycle.

(c) The power input to the compressor, in kJ/kg.

(d) The thermal efficiency (coefficient of performance)

Expert Solution

samet mamat answered 2 years ago

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