Experimental evaluation of flame-free refrigerant fittings according test criteria specific to R744

Stefan Elbel, Neal Lawrence, Sharat Raj, Tony LaGrotta, Michael Duggan

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The successful use of CO2 as a refrigerant on a large scale and its introduction to new applications requires the development of system components, including reliable, low-cost refrigeration fittings. Press fittings are an attractive option, because this connection type does not require an open flame, is easy to establish, and is suitable for field maintenance. However, the use of R744 exposes this fitting type to challenges that are characteristic to CO2 only. This paper reports the research conducted to explore the suitability of this new fitting type for use with CO2, including new test methods to study explosive decompression characteristics of its O-ring materials and the ability of the fittings' stainless steel body to withstand exposure to carbonic and activated acids. The results show that the sealing ability of the tested fittings is not compromised by explosive decompression or exposure to carbonic and activated acids.

Original languageEnglish (US)
Title of host publication13th IIR Gustav Lorentzen Conference on Natural Refrigerants
Subtitle of host publicationNatural Refrigerant Solutions for Warm Climate Countries, Proceedings
PublisherInternational Institute of Refrigeration
Pages255-262
Number of pages8
ISBN (Electronic)9782362150265
DOIs
StatePublished - Jan 1 2018
Event13th IIR Gustav Lorentzen Conference on Natural Refrigerants: Natural Refrigerant Solutions for Warm Climate Countries - Valencia, Spain
Duration: Jun 18 2018Jun 20 2018

Publication series

NameRefrigeration Science and Technology
Volume2018-June
ISSN (Print)0151-1637

Other

Other13th IIR Gustav Lorentzen Conference on Natural Refrigerants: Natural Refrigerant Solutions for Warm Climate Countries
CountrySpain
CityValencia
Period6/18/186/20/18

Keywords

  • Carbon dioxide
  • Carbonic acid
  • Durability test
  • Explosive decompression
  • Refrigeration fitting

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Electrical and Electronic Engineering
  • Mechanical Engineering
  • Condensed Matter Physics

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