11-2 A steady-flow Carnot refrigeration cycle uses refrigerant-134a as the working fluid. The refrigerant changes from saturated vapor to saturated liquid at 30°C in the condenser as it rejects heat. The evaporator pressure is 160 kPa. Show the cycle on a T-s diagram relative to saturation lines, and determine a) the coefficient of performance, b) the amount of heat absorbed from the refrigerated space, and c) the net work input. Answers: a) 5.64, b) 147 kJ/kg, c) 26.1 kJ/kg | |
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