Enhancing Efficiency and Sustainability of Domestic Split Air Conditioning units using R32 in both Microchannel and Finned tube condensers: Comparative and Experimental study

Document Type : Review Articles

Authors

Mechanical Department, Faculty of Engineering, Benha University, Benha, Egypt

10.21608/bjas.2025.373144.1701

Abstract

The objective of this study is to assess the performance characteristics of the HFC-32, a refrigerant with low global warming potential (GWP=675) and zero ozone depletion potential (ODP=0) in a split-type household air conditioner (STHAC). While keeping the finned tube heat exchanger (FTHE) evaporator design constant, the analysis contrasts two condenser configurations: a microchannel heat exchanger (MCHE) and FTHE. The ISO 5151:2017/Amd.1:2020 standard conditions for moderate and hot climates were used for the testing. The Air Enthalpy Test Method was used to test the input power, cooling capacity, and coefficient of performance (COP). The results show that the MCHE arrangement performs better than the FTHE design. In particular, for climate class T1, the cooling impact of the MCHE is 0.65% greater than that of the FTHE. The MCHE improves the coefficient of performance (COP) by 3.19% and lowers total input power by 2.82% in terms of energy efficiency. While for climate class T3, the cooling impact of the MCHE is 1.96 % greater than that of the FTHE. The MCHE improves the coefficient of performance (COP) by 3.78% and lowers total input power by 1.88% in terms of energy efficiency. The MCHE also has cost and environmental benefits: it lowers refrigerant charge volume by 36.6% and has a substantially reduced production cost. These findings imply that by reducing refrigerant use and related environmental effects, the adoption of microchannel heat exchangers in split-type home air conditioner STHAC systems could improve energy efficiency, reduce operating costs, and promote sustainability goals.

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Benha Journal of Applied Sciences
Volume 10, Issue 7 - Serial Number 7
Engineering Sciences
July 2025
Pages 151-164

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