PROBLEMS (1) A reversed Carnot cycle is used for refrigeration and rejects 1,000 kW of heat at 340 K while receiving heat at 250 K. Determine (a) COP, (b) the power required, and (c) the refrigerating...

Extracted text: PROBLEMS (1) A reversed Carnot cycle is used for refrigeration and rejects 1,000 kW of heat at 340 K while receiving heat at 250 K. Determine (a) COP, (b) the power required, and (c) the refrigerating effect. Ans. (a) 2.778, (b) 264.7 kW (c) 735.3 kW A reversed Carnot cycle has a refrigerating COP of 4. (2) (a) What is the ratio Tmax/Tmin? (b) If the work input is 6 kW, what will be the maximum refrigerating effect, kJ/min and tons. Ans. (a) 1.25, (b) 6.82 TR A reversed Carnot engine removes 40,000 kW from a (3) heat sink. The temperature of the heat sink is 260 K and the temperature of the heat reservoir is 320 K. Determine the power required of the engine. Ans. 9230.7 kW