Exergy and Performance Analysis of Three Stage Auto Refrigerating Cascade (3 Stage ARC) System Using Zeotropic Mixture of Eco-Friendly Refrigerants


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Abstract


To Rule out the CFC’s from Vapour Compression Refrigeration, the Zeotropic mixture of HC’s and HFC’s being the only alternates to cater to the needs of Cryo-cooling and Cryo-chamber technology, the Three Component Zeotropic Mixture of R1270/R170/R14 was studied for the existence of the 3 stage ARC system. Exergy Analysis was carried out on this system for Confirmation of the 3 stage ARC System and the results confirmed the Existence of the system. The effect of mass fraction on Coefficient of Performance (COP), Exergy lost, Exergic efficiency, Efficiency defect and the Evaporating temperature achieved were investigated for different mass fractions. In accordance with the Environmental issues and the process of sustainable development, the Three Component Zeotropic Mixture of R1270/R170/R14 with the mass fraction of 0.265:0.18:0.55 was performing best with the suggestion of an alternative refrigerant for Three stage Auto Refrigerating Cascade (3 stage ARC) System operating at Very low evaporating temperature in the range of 183K (-900C) at COP of 0.267 and comparatively increased Exergic efficiency up to 6.02% (66.9%). The better performance with COP of 0.316 and the Exergic efficiency of 63.1% at around 194K (-790C) have eliminated based on the fact that the lower most evaporating temperature was not achieved
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Keywords


Exergy Analysis; Exergic Efficiency; Efficiency Defect; 3 Stage ARC; Zeotropic Mixture of R1270/R170/R14; Performance Analysis; COP

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