Title: Effect of using ejector on energetic and exergetic performance of refrigeration systems

Authors: Erdem Ersayın; Leyla Ozgener

Addresses: Department of Mechanical Engineering, Engineering and Natural Sciences Faculty, Manisa Celal Bayar University, TR-45140, Muradiye, Manisa, Turkiye ' Department of Mechanical Engineering, Engineering and Natural Sciences Faculty, Manisa Celal Bayar University, TR-45140, Muradiye, Manisa, Turkiye

Abstract: The urgent need to decarbonise thermal systems has renewed focus on heat-driven refrigeration. Ejector refrigeration systems (ERCs) convert low-grade solar or waste heat into cooling using eco-friendly refrigerants. This paper critically reviews ejector design principles, refrigerant selection, and modelling approaches. A bibliometric analysis maps the transition from basic to integrated systems. While basic ERCs achieve COPs near 0.35, integration as expansion devices improves COP to 0.6, and hybrid systems exceed 0.75. Exergy efficiencies up to 35% are reported in advanced configurations. Findings highlight performance trends, research gaps, and future directions for ejectors in sustainable energy applications.

Keywords: ejector; energy; exergy; refrigeration; thermodynamics.

DOI: 10.1504/IJEX.2025.150732

International Journal of Exergy, 2025 Vol.48 No.4, pp.338 - 349

Received: 25 Mar 2025
Accepted: 08 Jul 2025
Published online: 22 Dec 2025 *

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