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Thermodynamic analysis of GAX and hybrid GAX aqua-ammonia vapor absorption refrigeration systems

descriptionPublicationkeyboard_double_arrow_right Article , Journal 01 Dec 2015Publisher:Elsevier BVJournal:International Journal of Hydrogen Energy, volume 40, pages 16,256-16,265 (issn: 0360-3199,

Authors: Manoj Dixit; Akhilesh Arora; S.C. Kaushik;

doi: 10.1016/j.ijhydene.2015.09.048

Thermodynamic analysis of GAX and hybrid GAX aqua-ammonia vapor absorption refrigeration systems

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Abstract

Abstract A thorough analysis of aqua-ammonia generator-absorber-heat exchanger (GAX) and hybrid GAX (HGAX) absorption refrigeration cycles based on energy and exergy has been carried out in this communication. The coefficient of performance (COP) and exergetic efficiencies are calculated at various operating conditions to study the effect of generator temperature, condenser temperature and evaporator temperature on them. The influence of generator temperature on exergetic efficiency is more pronounced than on COP. The effects of degassing range and approach temperature on first and second law efficiency are also examined. It is observed that the increase in approach temperature from 0 °C to 14 °C causes decrease in COP of GAX cycle by 30% and of HGAX cycles by 40%–45%. Desorber and absorber together accounts for highest exergy destruction.

Related Organizations

Indian Institute of Technology Delhi
India
Indian Institute of Technology Delhi
India

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