Lubricant effect on performance of R134a MAC microchannel evaporators

Huize Li, Predrag Hrnjak

Research output: Contribution to journalConference articlepeer-review


This paper presents an experimental study of lubricant effect on the performance of microchannel evaporators in a typical MAC system. R134a is used as the refrigerant with PAG46 lubricant. The increase of oil circulation rate elevates the pressure drop of the evaporator. The specific enthalpy change in evaporator decreases with increasing oil circulation rate, while refrigerant distribution appears to be more uniform as indicated by infrared images of the evaporator surface temperatures. Thus mass flow rate increases.

Original languageEnglish (US)
JournalSAE Technical Papers
StatePublished - 2014
EventSAE 2014 World Congress and Exhibition - Detroit, MI, United States
Duration: Apr 8 2014Apr 10 2014

ASJC Scopus subject areas

  • Automotive Engineering
  • Safety, Risk, Reliability and Quality
  • Pollution
  • Industrial and Manufacturing Engineering


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