Optimum performance of irreversible cascaded and double effect absorption refrigerators

The effects of thermal resistances and internal irreversibilities on the performances of cascaded and double effect absorption refrigeration cycles were investigated. Improved equations for the coefficient of performance (COP) of the systems under consideration were obtained. It was found that, under the same operation conditions, the cascaded cycle gives an increase of about 60% in the COP and 40% in the cooling load compared to that of a double effect cycle.