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Condensing heat transfer characteristics of hydrocarbon refrigerants in a horizontal tube
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 Title & Authors
Condensing heat transfer characteristics of hydrocarbon refrigerants in a horizontal tube
Jang, Yeong-Su; Kim, Min-Su; No, Seung-Tak;
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 Abstract
Condensing heat transfer characteristics of hydrocarbon refrigerants are experimentally investigated. Single component hydrocarbon refrigerants (propane, isobutane, butane and propylene) and binary mixtures of propane/isobutane and propane/butane are considered as test fluids. Local condensing heat transfer coefficients of selected refrigerants are obtained from overall conductance measurement. Average heat transfer coefficients at different mass fluxes and heat transfer rates are shown and compared with those of R22. Pure hydrocarbon refrigerants have higher values of heat transfer coefficient than R22. It is also found that there is a heat transfer degradation for hydrocarbon mixtures due to composition variation during condensation. Measured condensing heat transfer coefficients are compared with predicted values by available correlations. An empirical correlation for pure and mixed hydrocarbon is developed, and it shows good agreement with experimental data.
 Keywords
Hydrocarbon;Alternative Refregerant;Condensing Heat Transfer;Zeotropic Refrigerant Mixture;
 Language
Korean
 Cited by
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