EXERGOECONOMIC ANALYSIS OF A HIBRID ABSORPTION-EJECTO COMPRESSION CHILLER

The study of absorption refrigeration systems has gained more importance in the last years since the primary energy that is used in an absorption system may come from heat available from a residual source or, even, a renewable one. Therefore, these systems not only use energy that would be rejected to environment, but also they avoid consumption of expensive fossil fuels or electrical energy. The producing cost of mechanical work necessary to obtain a kWh of refrigeration for mechanical compression cycle is, normally, higher than the cost to recover the needed heat to obtain the same kWh in an absorption cycle. Also, the use of these systems reduce the impact on the environment by decreasing the emission of CO 2. This paper intends to show the performance of a hybrid absorption-ejecto compression chiller compared to conventional double and single effect water/lithium bromide systems, by means of an exergetic and exergoeconomic analysis of these configurations in order to calculate the exergy-based cost of the final product . The vapor compression refrigeration system is included in the results, as comparisson of the performance with absorption refrigeration systems analyzed.