R-744 gas cooler model development and validation

Jian Min Yin, Clark W. Bullard, Predrag S. Hrnjak

Research output: Contribution to journalArticlepeer-review


A first principles-based model was developed for a transcritical CO2 gas cooler, using a finite element method. The model uses published correlations for refrigerant and airside heat transfer and pressure drop. Experimental results are presented at 48 operating conditions. The model predicted the gas cooler capacity within ±2% and pressure drop on the R-744 side well within the range of experimental error. The model's usefulness is demonstrated by analyzing alternative circuiting and multi-slab designs.

Original languageEnglish (US)
Pages (from-to)692-701
Number of pages10
JournalInternational Journal of Refrigeration
Issue number7
StatePublished - Jul 2001


  • Carbon dioxide
  • Design
  • Gas cooling
  • Heat exchanger
  • Modelling
  • Regrigerant
  • Transcritical cycle

ASJC Scopus subject areas

  • Building and Construction
  • Mechanical Engineering


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