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1. Give an estimate for the overall COP of an ammonia absorption cycle used as a chiller to cool water to 5?C in a 25?C ambient when the small pump work is neglected. A heat source is available at 100?C. Also find the efficiency of the heat engine part and the COP of the refrigeration cycle part.

2. Consider a small ammonia absorption refrigeration cycle that is powered by solar energy and is to be used as an air conditioner. Saturated vapor ammonia leaves the generator at 50?C, and saturated vapor leaves the evaporator at 10?C. If 3000 kJ of heat is required in the generator (solar collector) per kilogram of ammonia vapor generated, determine the overall performance of this system.

Civil Engineering, Engineering

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