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2L flammability investigation and risk assessment enables automotive industry approval of HFO-1234yf.

Number: pap. 10

Author(s) : MINOR B. H., KOBAN M. E.

Summary

This paper will highlight the extensive flammability testing and evaluations completed which led to the conclusion that R1234yf is safe for use in automotive air conditioning as a replacement for R134a. R134a is being phased out in the European Union in automotive air conditioning systems due to high global warming potential and perceived excessive leakage from systems. R1234yf has been identified as a potential replacement with excellent environmental properties and cooling performance very similar to R134a. The most significant challenge in the transition to this new refrigerant is that it is mildly flammable. Therefore, it was important to understand the impact and associated risk of using a flammable refrigerant in automotive air conditioning systems. First, basic flammability properties of R1234yf were determined. Then leakage and ignition testing were conducted under a range of leak scenarios both in vehicles and during service. Finally, the results generated were incorporated into risk assessments to understand potential risks during automotive vehicle air-conditioning use. For R1234yf, this work was conducted and completed through unprecedented industry cooperation and sharing of information.

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Pages: 15 p.

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Details

  • Original title: 2L flammability investigation and risk assessment enables automotive industry approval of HFO-1234yf.
  • Record ID : 30007986
  • Languages: English
  • Source: ASHRAE/NIST Refrigerants Conference: moving towards sustainability.
  • Publication date: 2012/10/29

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