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THE AUTHORS GIVE THE RESULTS OF A STUDY OF R22 NUCLEATE BOILING. THE MEASUREMENT OF THE HEAT FLOW RANGES BETWEEN 9,500 AND 19,300 WATT/M2 BETWEEN 0.8 AND 1.6 MEGAPASCALS. HEAT TRANSFER OCCURRED IN A HORIZONTAL COPPER TUBE WITH AN AVERAGE SURFACE ROUGHNESS OF 0.3 MICROMETER. THE EFFECT OF PRESSURE AND HEAT FLOW IS STUDIED. A SEMI-EMPIRICAL EQUATION FOR EVAPORATION IS OBTAINED. DATA ARE ALSO COMPARED WITH SEVERAL EXISTING CORRELATIONS. MODIFIED KRUZHILIN, MCNELLY, KUTATELADZE AND BORISHANSKIY-MINCHENKO MODELS ARE RECOMMENDED FOR THE CALCULATION OF THE HEAT TRANSFER COEFFICIENT OF R22.
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Details
- Original title: NUCLEATE POOL BOILING DATA ON R22.
- Record ID : 1988-1786
- Languages: English
- Source: Development in refrigeration, refrigeration for development. Proceedings of the XVIIth international Congress of Refrigeration.
- Publication date: 1987/08/24
- Document available for consultation in the library of the IIR headquarters only.
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Indexing
- Themes: Mass transfer
- Keywords: Horizontal tube; Heat transfer coefficient; Roughness; Calculation; Measurement; R22; Surface state; Nucleate boiling
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