Abstract

Today air conditioning product and application designers, as a result of climate change contribution concerns from high global warming potential (GWP) refrigerants, are being asked to consider lower GWP refrigerants with various degrees of flammability. The HVACR industry has been actively investigating the safety of flammable refrigerants by determining their risks, potential occurrences and severity of events. Natural refrigerants, like hydrocarbons, have been investigated and seen expanded use when safety, efficiency, and reliability can be delivered to meet the customer needs. Today R410A is used to cover most air conditioning applications. Market fragmentation by refrigerant type may result to meet the regulatory demands on high GWP refrigerants. This paper will give an overview of the selection challenges faced by air conditioning product designers when considering the varying flammability characteristics of various refrigerants. It will give a methodology to determine the refrigerant charge and resulting cooling load for hydrocarbons, and finally a process for how to design for flammability safety depending on the application. Product standards, like UL484 and UL60335- 2-40, are continually being update to include the use of flammable refrigerants and will be reviewed along with others standards for the use hydrocarbons.

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call

Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.