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Investigation of two-phase heat transfer coefficients of argon–freon cryogenic mixed refrigerants



Seungwhan Baek


Mixed refrigerant Joule Thomson refrigerators are widely used in various kinds of cryogenic systems these days. Although heat transfer coefficient estimation for a multi-phase and multi-component fluid in cryogenic temperature range is necessarily required in the heat exchanger design of mixed refrigerant Joule Thomson refrigerator, it has been rarely discussed so far. In this paper, condensation and evaporation heat transfer coefficients of non-flammable mixed refrigerant are measured in a microchannel heat exchanger. Printed Circuit Heat Exchanger (PCHE) has been developed as a compact microchannel heat exchanger and utilized in the experiment. Several two-phase heat transfer coefficient correlations are examined to discuss the experimental measurement results. The result of this paper shows that cryogenic two-phase mixed refrigerant heat transfer coefficients can be estimated by conventional two-phase heat transfer coefficient correlations.


mixed refrigerant, two-phase, evaporation, condensation, heat transfer coefficient, microchannel


Baek, S. (2014), Investigation of two-phase heat transfer coefficients of argon–freon cryogenic mixed refrigerants, Cryogenics, [online], (Accessed May 29, 2024)


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Created September 28, 2014, Updated November 10, 2018