Control strategies for transcritical R744 systems

R. P. McEnaney, P. S. Hrnjak

Research output: Contribution to journalConference articlepeer-review


This paper presents one possible control strategy for a transcritical R744 automotive air conditioning system. The controller is developed for systems using clutch cycling, variable displacement, and variable speed compressors. The controller adjusts the high side pressure, blower speed, reheat, and modulates the compressor to achieve its goal. Test data is presented to support the claims and assumptions made and develop the controller.

Original languageEnglish (US)
JournalSAE Technical Papers
StatePublished - 2000
Externally publishedYes
EventSAE 2000 World Congress - Detroit, MI, United States
Duration: Mar 6 2000Mar 9 2000

ASJC Scopus subject areas

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


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