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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喷射式制冷系统的热力分析与优化

近年来，利用低品位废热作为能源已经引起了人们的极大兴趣。在有前途的技术中，热驱动喷射器制冷系统已经成为工业和商业冷却应用的潜在解决方案。虽然这些系统具有巨大的潜力，但由于相对较低的性能系数（COP）和使用对环境有害的制冷剂，它们的广泛采用受到阻碍。本研究旨在研究和优化喷射器制冷系统，以提高能源效率和确保可持续的冷却解决方案。它包括评估运行参数和制冷剂选择对系统性能的影响，使用工程方程求解器（EES）建模。对制冷剂R134a和环保型制冷剂R1234yf进行了对比分析，重点分析了关键参数，确定了系统的最佳工况。研究结果表明，冷凝温度和蒸发温度是影响系统性能的关键因素。虽然R134a和R1234yf都表现出类似的趋势，但R1234yf在特定操作条件下表现出优越的夹带比，使其成为可持续制冷系统的有希望的替代方案。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.