PERFORMANCE EVALUATION OF A COMBINED TRANSCRITICAL AND ABSORPTION REFRIGERATION SYSTEM

Abstract

The classical substances like CFCs and hydrochlorofluorocarbons (HCFCs) used as working fluids in the vapour compression plants have to be replaced by new substance because of high ozone depletion potential and their global warming potential. In this thesis the analysis for transcritical vapour compression refrigeration system and to increase the performance of the system addition of absorption refrigeration system cycle to transcritical vapour compression refrigeration cycle has been suggested. A computational model for the parametric investigation of these systems has been developed. The analysis involves the determination of effects of pressure of gas cooler, internal heat exchanger, efficiency of compressor, absorber, condenser and evaporator temperatures on the energetic and exergetic performance of these systems. The performance parameters computed are coefficient of performance, exergy destruction, and exergetic efficiency. The results indicate that the pressure of gas cooler yi...