Condensation heat transfer coefficients of R1234yf on plain, low fin, and Turbo-C tubes

In this study, external condensation heat transfer coefficients (HTCs) of HFC134a and R1234yf are measured on a plain, low fin, and Turbo-C tubes at the saturated vapor temperature of 39 °C with the wall subcooling of 3–8 °C. R1234yf is a new alternative refrigerant of low greenhouse warming potenti...

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Bibliographic Details
Published in:International journal of refrigeration 2011, Vol.34 (1), p.317-321
Main Authors: Park, Ki-Jung, Kang, Dong Gyu, Jung, Dongsoo
Format: Article
Language:English
Subjects:
Air conditioning
Applied sciences
Automobile
Coefficient de transfert de chaleur
Condenser
Condenseur
Conditionnement d'air
Energy
Energy. Thermal use of fuels
Exact sciences and technology
Finned tube
Heat exchanger
Heat transfer
Heat transfer coefficient
Measurement
Mesure
Plain tube
R1234yf
R134a
Refrigerants
Refrigerating engineering
Refrigerating engineering. Cryogenics. Food conservation
Techniques. Materials
Theoretical studies. Data and constants. Metering
Tube aileté
Tube lisse
Échangeur de chaleur
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Summary:In this study, external condensation heat transfer coefficients (HTCs) of HFC134a and R1234yf are measured on a plain, low fin, and Turbo-C tubes at the saturated vapor temperature of 39 °C with the wall subcooling of 3–8 °C. R1234yf is a new alternative refrigerant of low greenhouse warming potential for replacing HFC134a, one of the greenhouse gases in Kyoto protocol, used extensively in automobile air conditioners and other refrigeration systems. Test results show that the condensation HTCs of R1234yf are very similar to those of HFC134a for all three surfaces tested. For the development of heat transfer correlations, thorough property measurements are needed for R1234yf in the near future.
ISSN:0140-7007
1879-2081
DOI:10.1016/j.ijrefrig.2010.06.010