224. In an actual refrigeration cycle using R12 as working fluid, the refrigerant flow rate is 0.05

kg/s. Vapor enters the expansion valve at 1.15 MPa, 40°C (h = 238.5 kJ/kg) and leaves the

evaporator at 175 kPa, -15°C (h = 345 kJ/kg). The electric iput to motor driving the compressor

is measured and found 3.0 kW. Motor efficiency at this load 92% and mechanical efficiency

82%. Determine the actual coefficient of performance for this cycle.

A. 1.58 B. 2.36 C. 1.78 D. 1.3