Energetic and Exergetic Analysis of Two-Phase Constant Pressure Ejector Used in Ejector Expansion Refrigeration System (EERS) Using Alternative Refrigerants
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Abstract
The study explores an ejector expansion refrigeration system in which a constant pressure ejector is incorporated as expansion device in place of throttle valve used in conventional vapour compression refrigeration system. To identify the potential performance enhancement, an energy and exergy numerical analysis were conducted using five different refrigerant R134a, R1234yf, R1234ze, R410a and R152a as these are used in various domestic and industrial application. The novelty of this study lies in the application of energetic and exergetic analysis to a two-phase constant-pressure ejector in an ejector expansion refrigeration system using alternative refrigerants, which has not been adequately explored in previous literature. Coefficient of Performance, Exergy Destruction, Exergy Efficiency is evaluated from the mathematical model developed using Engineering Equation Solver (EES). R1234ze gives better performance as improvement in COP of about 10% to 28% is observed in Ejector Expansion Cycle (EEC) as compared to (BC). Also, Total Exergy Destruction decrement from 52% to 26% is estimated due to which exergy efficiency improvement decreases to 8% from 23% in an EEC as compared to BC, if evaporator temperature changes from 248K to 288K at constant condenser temperature of 318K.
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This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
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