Question

In a vapor-compression refrigeration cycle, ammonia exits the evaporator as saturated vapor at -22 °C. There are irreversibilities in the compressor. The refrigerant enters the condenser at 16 bar and 160 °C, and saturated liquid exits at 16 bar. There is no significant heat transfer between the compressor and its surroundings, and the refrigerant passes through the evaporator with a negligible change in pressure.

Calculate the coefficient of performance, b, and the isentropic compressor efficiency, defined as:

2s Condenser Expansion Compressor valve Evaporator 4 Saturated or superheated vapor In a vapor-compression refrigeration cycle, ammonia exits the evaporator as saturated vapor at -22 °C. There are irreversibilities in the compressor. The refrigerant enters the condenser at 16 bar and 160 °C, and saturated liquid exits at 16 bar. There is no significant heat transfer between the compressor and its surroundings, and the refrigerant passes through the evaporator with a negligible change in pressure. Calculate the coefficient of performance, β, and the isentropic compressor efficiency, ideal defined as:

Answer 1

aA ama at T31 h1-h4 1010ー1435 ー