Energy and Exergy Analyses of Triple-evaporator Ejector Expansion Refrigeration Cycle (TEEERC) with an Environmentally-friendly Working Fluid

This paper presents a theoretical analysis of a triple-evaporator ejector expansion refrigeration cycle (TEEERC) using isobutane as working fluid. The refrigeration output has been used for three different applications of cooling (-3 ° C), freezing (-21°C), and air-conditioning (5°C), respectively. The energetic and exergetic analyses of the proposed system have been performed leading to determination of the main source of the irreversibility in the whole cycle. It is shown that condenser accounts for the main source of the irreversibility which constitutes around 46.57 % of the overall system losses. Under the constrained parameters, the coefficient of performance (COP) and exergy efficiency are calculated 4.898 and 11.92 %, respectively. At last, sensitivity analysis of some key parameters has been conducted. It has been demonstrated that one can obtain higher energy and exergy performances for a lower condenser temperature and a higher evaporators temperature. .