Compact counterflow gas cooler for R-744

C. W. Bullard, J. M. Yin, P. S. Hrnjak, Michael Heidenreich

Research output: Contribution to journalConference articlepeer-review


The exit temperature from the gas cooler is an extremely important parameter affecting the efficiency of the transcritical air-conditioning and heat pump cycle. Interest in carbon dioxide as a refrigerant has recently led to the development and testing of several prototypes, all of cross-flow design. This article employs a simulation model to analyze trade-offs (pressure drop vs. heat transfer) involved in approaching counter-flow configuration through multi-slab configurations. It also presents the first experimental confirmation of the model.

Original languageEnglish (US)
Pages (from-to)487-491
Number of pages5
JournalASHRAE Transactions
Volume108 PART 1
StatePublished - 2002
Event2002 ASHRAE Winter Meeting - Atlantic City, NJ, United States
Duration: Jan 13 2002Jan 16 2002

ASJC Scopus subject areas

  • Building and Construction
  • Mechanical Engineering


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