Refrigerant 134a is the working fluid in a vapor-compression heat pump that provides 25 kW to heat a dwelling on a day w

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answerhappygod
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Refrigerant 134a is the working fluid in a vapor-compression heat pump that provides 25 kW to heat a dwelling on a day w

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Refrigerant 134a is the working fluid in a vapor-compression
heat pump that provides 25 kW to heat a dwelling on a day
when the outside temperature is below freezing. Saturated vapor
enters the compressor at 2.6 bar, and saturated liquid
exits the condenser, which operates at 8 bar.


Determine for an isentropic compressor efficiency
of 75%:

(a) the refrigerant mass flow rate, in kg/s.

(b) the magnitude of the compressor power, in kW.

(c) the coefficient of performance.
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