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HEAT TRANSFER COEFFICIENT FOR TWO-PHASE FLOW BOILING IS MEASURED FOR A MIXTURE OF R134A AND TWO DIFFERENT OILS. BOTH OILS ARE ESTER BASED, BUT THEY HAVE DIFFERENT SOLUBILITY CHARACTERISTICS. THE OIL CONTENT VARIES FROM NO OIL TO 5% IN MASS. THE TEST SECTION CONSISTS OF A 10 METER-LONG HORIZONTAL, SMOOTH TUBE. THE HEATFLUX VARIES FROM 2 TO 10 KILOWATTS/M2. THE RESULTS OF THE TESTS FOR HEAT TRANSFER COEFFICIENTS FOR MIXTURE OF REFRIGERANT WITH OIL ARE COMPARED TO THOSE FOR PURE R134A. THE RESULTS SHOW THAT OIL HAS MOSTLY A NEGATIVE EFFECT ON THE HEAT TRANSFER COEFFICIENT.
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Details
- Original title: TWO-PHASE FLOW BOILING OF OIL-HFC-134A MIXTURE.
- Record ID : 1992-2136
- 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.
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Indexing
- Themes: Mass transfer
- Keywords: R134a; Horizontal tube; Heat transfer coefficient; Heat transfer; Oil; Boiling
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