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A Microgravity Flame Speed Study on Refrigerant Mixtures of 2,3,3,3-Tetrafluoropropene (R1234yf) and Difluoromethane (R32)

Published

Author(s)

Raik Hesse, Roman Glaznev, Christian Schwenzer, Valeri I. Babushok, Gregory T. Linteris, Heinz Pitsch, Joachim Beeckmann

Abstract

Today's hydrofluorocarbon (HFC) refrigerants are designed to have a low global warming potential (GWP), resulting in fast atmospheric decomposition and increased reactivity. This causes them to be mildly flammable. The laminar flame speed SL,u ranks refrigerants by their hazardous fire potential. Slowly propagating refrigerants are less hazardous. However, their combustion becomes affected by gravity and radiation, raising concerns regarding the robustness and accuracy of flame speed measurements. In the present study, we conducted experiments to obtain SL,u of two representative refrigerants, 2,3,3,3-tetrafluoro-1-propene (CH2= CFCF3, R1234yf), difluoromethane (CH2F2, R32), and corresponding blends in a drop tower facility providing microgravity conditions to suppress buoyancy. The study reveals that SL,u of R1234yf was underestimated by previous experiments.
Proceedings Title
Proceedings of the European Combustion Meeting 2023
Conference Dates
March 24, 2023
Conference Location
Rouen, FR
Conference Title
European Combustion Meeting 2023

Keywords

refrigerant flammability, R-32, R-1234yf, laminar flame speed, burning velocity, premixed flame.

Citation

Hesse, R. , Glaznev, R. , Schwenzer, C. , Babushok, V. , Linteris, G. , Pitsch, H. and Beeckmann, J. (2023), A Microgravity Flame Speed Study on Refrigerant Mixtures of 2,3,3,3-Tetrafluoropropene (R1234yf) and Difluoromethane (R32), Proceedings of the European Combustion Meeting 2023, Rouen, FR, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=936616 (Accessed May 30, 2024)

Issues

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Created September 25, 2023, Updated September 26, 2023