Skip to main content

Options for Low–global-warming-potential and Natural Refrigerants- Performance for Heat Pump Application and Analysis of Systemic Irreversibilities

by Kashif Nawaz, Moonis R Ally, Vishaldeep Sharma
Publication Type
Conference Paper
Journal Name
Proceedings of 25th IIR International congress of Refrigeration
Book Title
Proceedings of the 25th IIR International Congress of Refrigeration
Publication Date
Page Number
Conference Name
25th IIR International congress on Refrigeration
Conference Location
Montreal, Canada
Conference Sponsor
International Institute of Refrigeration
Conference Date

There is growing interest in substituting existing refrigerants with low global warming potential (GWP) refrigerants, including naturally occurring fluids, to reduce the impact of human activities on climate change. In this study we have evaluated prospective low-GWP refrigerants in four distinct heat pump cycles using the First and Second laws of thermodynamics. The essence of the study is to establish the performance of the low-GWP refrigerants when deployed in a heat pump system. Exergy analysis provides a true measure of lost work, or systemic inefficiencies, vividly quantifying areas of improvement and identifying the preferred cycle for a refrigerant. The combined knowledge of the properties of the phase boundary on either side of the critical point (DOI:10.1.18462/iir.icr.2019.442), and exergy analysis of prospective cycles is necessary for a better perspective on discriminating among refrigerants as hydrochlorofluorocarbons are phased out and replacement refrigerants must be found.