Summary
The working fluid in refrigerating or heat pump units consists of a zeotropic mixture including the refrigerant (pure or mixture) and a blend of several molecules constituting the lubricant (oil). The analysis of the actual behaviour of the mentioned oil + refrigerant mixture inside each circuit component is rather complicated, since the presence of the lubricant strongly affects the thermophysical properties of the flowing fluid and thus plays a key role in the heat transfer process. The impact of lubricant on both gas-cooling and evaporation processes is reported in this paper, with reference to research work appeared in the open literature.
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Details
- Original title: Effects of lubricant on carbon dioxide heat transfer in transcritical refrigerating cycles.
- Record ID : 2010-0029
- Languages: English
- Source: Latest technologies in refrigeration and air conditioning: energy issues and climate change, new refrigerants, new European regulations, new plants, the cold chain. XIII European Conference: June 12-13, 2009, Milan.
- Publication date: 2009/06/12
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Indexing
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Scroll compressors for R744 (CO2) in refrigerat...
- Author(s) : WINANDY E.
- Date : 2008
- Languages : English
- Source: The Institute of Refrigeration: annual proceedings. Volume 105, 2008-2009.
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Cycles CO2 transcritiques.
- Author(s) : MEUNIER F.
- Date : 2006/01/18
- Languages : French
- Source: Actualités réglementaires et techniques. Journée française du Froid : recueil des conférences.
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Development and test of bottle coolers with nat...
- Author(s) : PEDERSEN P. H., CHRISTENSEN B.
- Date : 2008/09/07
- Languages : English
- Source: 8th IIR-Gustav Lorentzen Conference on Natural Working Fluids (GL2008)
- Formats : PDF
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Comparison of CO2 heat pump water heater perfor...
- Author(s) : FERNANDEZ N., HWANG Y., RADERMACHER R.
- Date : 2010/05
- Languages : English
- Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 33 - n. 3
- Formats : PDF
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The application of ultracritical CO2 refrigerat...
- Author(s) : LIU T.
- Date : 2007/06
- Languages : Chinese
- Source: Refrigeration - vol. 26 - n. 2
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