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Influence of lubricant oil on CO2 heat transfer in minichannel tubes.
Author(s) : SIEGISMUND V., KAUFFELD M.
Summary
This paper describes the design of test facilities and experiments for heat transfer measurements of evaporating CO2/oil mixtures. Experimental results of evaporation tests are presented. The test section consists of a 0.5 m long standard MPE (multi-port extruded) aluminium profile with 13 circular flow channels with a diameter of 0.8 mm each. Design parameters for the test facility and the test matrix were based on requirements for automotive air conditioning, i.e. refrigerant mass flux 60-130 kg/(m2.s), reduced pressure 0.47-0.61, vapour fraction 0.2-0.9 and oil concentration 0-10% by mass.
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Pages: 2005-3
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Details
- Original title: Influence of lubricant oil on CO2 heat transfer in minichannel tubes.
- Record ID : 2006-0583
- Languages: English
- Source: Commercial Refrigeration. Thermophysical Properties and Transfer Processes of Refrigerants. Proceedings of the IIR International Conferences.
- Publication date: 2005/08/02
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Indexing
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Themes:
Heat transfer;
Mass transfer;
CO2;
Lubricants - Keywords: Heat transfer coefficient; Gas; Microfin tube; Measurement; Lubricant; Tube; Cooling; Mixture; Expérimentation; Refrigerant; Boiling; CO2
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- Source: Commercial Refrigeration. Thermophysical Properties and Transfer Processes of Refrigerants. Proceedings of the IIR International Conferences.
- Formats : PDF
View record