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Viscosity for mixtures of HFCs and pentaerythritol esters.
Author(s) : WAHLSTRÖM Å., VAMLING L.
Summary
Pentaerythritol esters are suggested as likely alternatives for HFC compressor oils in heat pumps and refrigeration plants. The viscosities of mixtures of HFC-134a and HFC-125 in pentaerythritol tetrapentanoate and in pentaerythritol tetra-2-ethylhexanoate have been measured in the normal range of temperature and concentration with uncertainties of less than 4 and 2% respectively. The results are compared with a new simple predictive model. For mixtures of HFC with mass fractions of around 20% the model can predict viscosities with an uncertainty of less than 25% with the accuracy increasing for lower mass fractions.
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Details
- Original title: Viscosity for mixtures of HFCs and pentaerythritol esters.
- Record ID : 2000-1178
- Languages: English
- Source: 20th International Congress of Refrigeration: Refrigeration into the Third Millennium.
- Publication date: 1999/09/19
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Indexing
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Themes:
Lubricants;
Blends - Keywords: Viscosity; Measurement; Lubricant; Accuracy; Simulation; Mixture; Ester; Refrigerant
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- Date : 1994/10/24
- Languages : English
- Source: The 1994 International CFC and Halon Alternatives Conference. Stratospheric Ozone Protection for the 90's. Proceedings.
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- Date : 2000
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- Source: ASHRAE Transactions. 2000 Winter Meeting, Dallas, Texas + CD-ROM.
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- Date : 1995/10/23
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- Source: Stratospheric Ozone Protection for the 90's. 1995 International CFC and Halon Alternatives Conference & Exhibition. Conference proceedings.
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- Author(s) : THOMAS R. H. P., WU W. T., PHAM H. T.
- Date : 1991/08/10
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- Source: New challenges in refrigeration. Proceedings of the XVIIIth International Congress of Refrigeration, August 10-17, 1991, Montreal, Quebec, Canada.
- Formats : PDF
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- Date : 2005/08/02
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- Source: Commercial Refrigeration. Thermophysical Properties and Transfer Processes of Refrigerants. Proceedings of the IIR International Conferences.
- Formats : PDF
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