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Title:Modeling and Analysis of Gas Coolers
Author(s):Fang, X.
Subject(s):heat transfer
heat exchangers
supercritical pressures
Abstract:The transcritical cycle of carbon dioxide in air conditioning and heat pump systems needs the research on heat transfer and pressure loss of heat exchangers operating at supercritical pressures. This paper offers a comprehensive survey of single-phase in-tube heat transfer correlations, C02 supercritical heat transfer, friction factor correlations, the calculation of pressure loss in the supercritical conditions, and the heat transfer and friction factor correlations on the gas cooler air-side. The equations for calculating heat transfer and pressure loss at supercritical pressures both in the fully developed turbulent regime and in the transitional regime are obtained. Based on the mathematical model, a computer simulation program in EES for gas coolers is developed. The verification with experimental data is made thereafter. The prediction agrees with the experimental data very well. Some analyses on gas cooler thermal performance are carried out with the program.
Issue Date:1999-06
Publisher:Air Conditioning and Refrigeration Center. College of Engineering. University of Illinois at Urbana-Champaign.
Series/Report:Air Conditioning and Refrigeration Center CR-16
Genre:Technical Report
Date Available in IDEALS:2009-07-27

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