AN UPDATE ON LOW-GWP REFRIGERANTS:Options and Challenges

Published

June 22, 2022

Author(s)

Piotr Domanski

Abstract

The presentation provides historical perspective and a short summary of the screening process for medium- and high-pressure fluids indicating that the probability of finding new low-GWP fluids is minimal. A review of available low-GWP single-compound refrigerants and blends is given for different applications as different fluid options are suitable (or not) for different equipment. Rather limited options for unitary air conditioning (using R-410A) and commercial refrigeration (using R-404A) is highlighted as the identified hydrofluoroolefins (HFOs), successfully used in low- and medium-pressure systems, do not have a normal boiling point (NBP) low enough for high-pressure applications. This precludes their use unless blended with low-boiling fluids, which have a much higher GWP (except hydrocarbons). The presentation also discusses the trade-off between GWP and flammability, and the latest fluids under consideration.

Proceedings Title

Proceedings of the 50th Anniversary Conference of Society of Air Conditioning and Refrigeration Engineers of Korea

Conference Dates

June 22-26, 2021

Conference Location

Pyeongchang, KR

Conference Title

50th Anniversary Conference of Society of Air Conditioning and Refrigeration Engineers of Korea

Pub Type

Conferences

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Keywords

air Conditioning, coefficient of performance, global warming potential, refrigerants, volumetric capacity

Citation

Domanski, P. (2022), AN UPDATE ON LOW-GWP REFRIGERANTS:Options and Challenges, Proceedings of the 50th Anniversary Conference of Society of Air Conditioning and Refrigeration Engineers of Korea, Pyeongchang, KR, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=932668 (Accessed July 2, 2025)