Thermodynamic analysis and optimization of an ejector refrigeration system for sustainable cooling applications

IF 3.5 2区工程技术 Q1 ENGINEERING, MECHANICAL

International Journal of Refrigeration-revue Internationale Du Froid Pub Date : 2025-04-01 DOI:10.1016/j.ijrefrig.2025.03.004

Nawel Khaldi, Safa Sdiri, Mariem Lazaar

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引用次数: 0

Abstract

Leveraging low-grade waste heat as an energy source has gained significant interest in recent years. Among the promising technologies for this purpose, heat-driven ejector refrigeration systems have emerged as potential solutions for industrial and commercial cooling applications. While these systems hold significant potential, their widespread adoption has been hindered by relatively low coefficients of performance (COP) and the use of environmentally harmful refrigerants.

This study aims to investigate and optimize ejector refrigeration systems to enhance energy efficiency and ensure sustainable cooling solutions. It involves evaluating the influence of operating parameters and refrigerant selection on system performance, modeled using the Engineering Equation Solver (EES). A comparative analysis of the refrigerants R134a and the environmentally friendly R1234yf is conducted, focusing on key parameters to identify optimal system conditions. Our findings reveal that condensation and evaporation temperatures are crucial factors influencing system performance. While both R134a and R1234yf exhibit similar trends, R1234yf demonstrates superior entrainment ratios under specific operating conditions, making it a promising alternative for sustainable refrigeration systems.

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来源期刊

International Journal of Refrigeration-revue Internationale Du Froid 工程技术-工程：机械

CiteScore

7.30

自引率

12.80%

发文量

363

审稿时长

3.7 months

期刊介绍： The International Journal of Refrigeration is published for the International Institute of Refrigeration (IIR) by Elsevier. It is essential reading for all those wishing to keep abreast of research and industrial news in refrigeration, air conditioning and associated fields. This is particularly important in these times of rapid introduction of alternative refrigerants and the emergence of new technology. The journal has published special issues on alternative refrigerants and novel topics in the field of boiling, condensation, heat pumps, food refrigeration, carbon dioxide, ammonia, hydrocarbons, magnetic refrigeration at room temperature, sorptive cooling, phase change materials and slurries, ejector technology, compressors, and solar cooling. As well as original research papers the International Journal of Refrigeration also includes review articles, papers presented at IIR conferences, short reports and letters describing preliminary results and experimental details, and letters to the Editor on recent areas of discussion and controversy. Other features include forthcoming events, conference reports and book reviews. Papers are published in either English or French with the IIR news section in both languages.