Dynamic Modeling of a Refrigeration System with an Internal Heat Exchanger and Dual Evaporators through Exergoeconomic Analysis

摘要

In this study exergy and exergoeconomic analyses of a refrigeration system with twoevaporators and an internal heat exchanger were performed. The analysis of the whole system includedvarious thermodynamics parameters such as sustainability index, exergetic improvement potential, ratioof the thermodynamic losses(energetic and exergetic losses) to the capital cost, relative irreversibility foreach component of the system. Furthermore, the efficiencies for each component were analyzed using twodifferent approaches, one was the net rational efficiency basis and another one was the product/fuelbasis. The whole system efficiency on the net rational basis was determined to be 7.24% and on theproduct/fuel basis it was obtained to be 43.92%. The system has a huge capacity for improvement. Thegreatest Irreversibility occurs in the compressor with a value of 0.29 kW and the efficiency values for thecompressor using both the approaches were found to be 16.9% and 21.57%, respectively.