Ejector in R410A vapor compression systems with experimental quantification of two major mechanisms of performance improvement: Work recovery and liquid feeding

Gustavo Pottker, Pega Hrnjak

Research output: Contribution to journalArticle

Abstract

This paper presents experimental data and analysis comparing the performance of an R410A ejector vapor compression system to those of a liquid-fed evaporator system and a conventional expansion valve system. The objective was to quantify separately two major improvements of the ejector system: work recovery and liquid-fed evaporator. The ejector system was first compared to a system with liquid-fed evaporator at matching cooling capacities and revealed improvements from 1.9% to 8.4% solely due to the work recovery of the ejector. When compared to a conventional expansion valve system at the same cooling capacity, the ejector setup improved COP from 8.2% to 14.8% due to simultaneous benefits of liquid-fed evaporator and work recovery. Overall ejector efficiencies from 12.2% to 19.2% were achieved.

Original languageEnglish (US)
Pages (from-to)184-192
Number of pages9
JournalInternational Journal of Refrigeration
Volume50
DOIs
StatePublished - Feb 2015

Keywords

  • Ejector
  • Expansion
  • Flash gas bypass
  • R410A
  • Throttling loss
  • Work recovery

ASJC Scopus subject areas

  • Building and Construction
  • Mechanical Engineering

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