Theoretical piston displacement, power required for the compressor and the COP.

Question

A simple R-12, heat pump, used for space heating, operates between 15^oC and 50^oC. Heat required to be pumped is 100MJ/hr. Calculate the quality of the refrigerant entering the evaporator, mass flow rate of the refrigerant and discharge temperature coming out of the compressor, theoretical piston displacement, power required for the compressor and the COP.

         Assume C_p of vapour as 0.8kJ/kg-K and specific volume of saturated vapour at 15^oC as 0.0354m³/kg

tsat oC	Psat kPa	hf               hg       kJ/kg		sf                    sg         kJ/kg-K
15	0.491	50.1	193.8	0.1915	0.6902
50	1.291	84.9	206.5	0.3037	0.6797