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A refrigerant-134a is used in a heat pump cycle as shown in the figure to keep the rooms in a house at constant temperature of 25°C. The refrigerant absorbs energy in the evaporator from a hot water at with temperature of 50°C. The mass flow rate of the water is 0.065 kg/s and compressor work is 1.2 kW. Determine the following: (A) the mass flow rate of the refrigerant? (B) the rate of heat supply? (C) the COP? (D) the minimum power input to the compressor for the same rate of heat supply?

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