Entropy, Exergy Analysis and Optimization for Refrigeration and Heat Pump Systems

Dear Colleagues,

Refrigeration machines and heat pumps are energy-conversion systems that operate based on inverse thermodynamic cycles. Refrigeration machines and heat pumps are core systems in air conditioning, cooling, freezing, artificial heating, and thermal management applications across residential, commercial, and industrial sectors. Due to the high energy consumption associated with these systems, improving their thermodynamic performance is a major research and engineering goal. Conventional performance indicators (the first law of thermodynamics)—the coefficient of performance (COP) is the key indicator—are applied to the overall system. To address the irreversibilities within system components, entropy analysis (the second law of thermodynamics) should be applied. Exergy analysis, as a combination of the first and second laws of thermodynamics, offers a more comprehensive tool for evaluating the performance of the overall system and its components. Optimizing refrigeration and heat pump systems using entropy and exergy concepts involves reducing entropy generation and minimizing exergy destruction through improved component design and operating strategies. This includes optimizing compressor efficiency, enhancing heat-exchanger effectiveness, selecting environmentally friendly and thermodynamically suitable refrigerants, and optimizing temperature and pressure levels. Exergy-based analysis and optimization further support decision-making by linking thermodynamic performance with economic and environmental considerations.

This Special Issue aims to showcase new improvements and optimizations of refrigeration machines, heat pumps, and thermodynamic methods.

Prof. Dr. Tetyana Morozyuk
Dr. Muhammad Sultan
Guest Editors

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