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POOL BOILING HEAT TRANSFER FROM SINGLE TUBES TO NEW REFRIGERANTS.
Author(s) : GORENFLO D., SOKOL P., CAPLANIS S.
Summary
TWO OF THE POSSIBLE SUBSTITUTES ARE R134A AND R227. IN ORDER TO INVESTIGATE THEIR HEAT TRANSFER PERFORMANCE IN EVAPORATORS, MEASUREMENTS WITH POOL BOILING FROM SINGLE PLAIN AND FINNED COPPER TUBES WERE CARRIED OUT IN A WIDE RANGE OF SATURATION PRESSURES. THE HEAT FLUX VARIED FROM FREE CONVECTION WITHOUT BUBBLE FORMATION UP TO A VERY INTENSE NUCLEATE BOILING. THE RESULTS SHOW THAT THE HEAT TRANSFER COEFFICIENTS FOR R134A ARE EQUAL TO OR BETTER THAN THOSE OF R22, AND THE SAME HOLDS FOR R227 IN COMPARISON WITH R114, IF ALL THE OTHER IMPORTANT PARAMETERS ARE THE SAME.
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Details
- Original title: POOL BOILING HEAT TRANSFER FROM SINGLE TUBES TO NEW REFRIGERANTS.
- Record ID : 1992-1571
- Languages: English
- Source: New challenges in refrigeration. Proceedings of the XVIIIth International Congress of Refrigeration, August 10-17, 1991, Montreal, Quebec, Canada.
- Publication date: 1991/08/10
- Document available for consultation in the library of the IIR headquarters only.
Links
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Indexing
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Themes:
CFCs;
HCFCs;
HFCs;
Mass transfer - Keywords: R134a; R114; Pool boiling; Heat transfer coefficient; Finned tube; Heat transfer; Bare pipe; R227; R22; Substitute; Refrigerant; Nucleate boiling
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