Refrigerant 134a is the working fluid in a vapor-compression heat pump that provides 35 kW to heat a dwelling on a day when the outside temperature is below freezing. Saturated vapor enters the compressor at 1.6 bar, and saturated liquid exits the condenser, which operates at 8 bar. Determine for an isentropic compressor efficiency of 85%: (a) the refrigerant mass flow rate, in kgis. (b) the magnitude of the compressor power, in kW. (c) the coefficient of performance.

Refrigerant 134a is the working fluid in a vapor-compression heat pump that provides 35 kW to heat a dwelling on a day when the outside temperature is below freezing. Saturated vapor enters the compressor at 1.6 bar, and saturated liquid exits the condenser, which operates at 8 bar. Determine for an isentropic compressor efficiency of 85%: (a) the refrigerant mass flow rate, in kgis. (b) the magnitude of the compressor power, in kW. (c) the coefficient of performance.