Heat transfer and pressure drop of gas coolers

X. Fang, C. W. Bullard, Predrag Stojan Hrnjak

Research output: Contribution to journalConference articlepeer-review

Abstract

In the CO2 transcritical cycle of air-conditioning and heat pump systems, the heat exchanger operating at supercritical pressures is called a gas cooler. Refrigerant-side heat transfer and pressure drop in gas coolers are different from single-phase in-tube heat transfer and pressure drop at subcritical pressures. This paper offers a comprehensive survey of single-phase in-tube heat transfer correlations of constant thermophysical property fluids, CO2 supercritical heat transfer and friction factor correlations, the calculation of pressure drop in supercritical conditions, and the heat transfer and friction factor correlations on gas cooler air sides. Based on comparisons among in-tube heat transfer and friction factor correlations, some suggestions are made.

Original languageEnglish (US)
Pages (from-to)255-266
Number of pages12
JournalASHRAE Transactions
Volume107 PART. 1
StatePublished - Jan 1 2001
Externally publishedYes
EventASHRAE Transactions. -2001 Winter Meeting. - Atalanta, GA, United States
Duration: Jan 27 2001Jan 31 2001

ASJC Scopus subject areas

  • Building and Construction
  • Mechanical Engineering

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