Heat Transfer and Pressure Drop of Gas Coolers

Xiande Fang, Clark W. Bullard, Predrag Stojan Hrnjak

Research output: Contribution to conferencePaperpeer-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 thermo-physical 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)
Pages325-336
Number of pages12
StatePublished - Dec 1 2001
EventASHRAE 2001 Winter Meeting CD, Technical and Symposium Papers - Atlanta, GA, United States
Duration: Jan 1 2001Jan 1 2001

Other

OtherASHRAE 2001 Winter Meeting CD, Technical and Symposium Papers
CountryUnited States
CityAtlanta, GA
Period1/1/011/1/01

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes
  • Engineering (miscellaneous)

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