The heat transfer rate required to keep the indoor temperature of a house at 19 C on a day when the air temperature is 3 C is 15 kW. At home, a steam compression heat pump is used for heating purposes, in which R134a is used as the operating fluid. In addition, this process includes an expansion valve. The temperature differences required to ensure the heat transfers in the evaporator and condenser are 7 C

and since the efficiency of the compressor is 80%,,

a) The mass flow rate of the refrigerant fluid (kJ/min),

b) The power required for the compressor (kW),

c) Calculate the performance coefficient of the heat pump.