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Flow boiling heat transfer of ammonia and ammonia-oil mixtures.
Author(s) : BUHR H. J. de, KABELAC S.
Summary
The paper will address the problem of predicting the flow-boiling heat transfer coefficient and the pressure drop of ammonia-oil mixtures in enhanced aluminium tubing suitable for small-scale refrigeration equipment. The influence of oil on flow-boiling heat transfer will be discussed. The problem of using commonly cited flow pattern maps and pressure drop correlations in non-adiabatic situations is addressed as well as the influence of constant heat-flux boundary condition instead of constant-wall-temperature condition found in technical applications. A laboratory setup will be presented.
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Pages: 1998-4
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Details
- Original title: Flow boiling heat transfer of ammonia and ammonia-oil mixtures.
- Record ID : 1999-2836
- Languages: English
- Source: Natural Refrigerants, Energy Efficiency, Cost and Safety. Natural Working Fluids '98. IIR-Gustav Lorentzen Conference.
- Publication date: 1998/06/02
- Document available for consultation in the library of the IIR headquarters only.
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Indexing
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Themes:
Heat transfer;
Ammonia;
Lubricants;
Blends - Keywords: Horizontal tube; Heat transfer coefficient; Measurement; Lubricant; Heat transfer; Ammonia; Aluminium; Refrigerant; Boiling; Pressure drop
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