Pressure drop and visualization of R134a two-phase flow in a rectangular microchannel.
Author(s) : TU X., HRNJAK P. S.
Summary
Adiabatic two-phase flow of R134a has been characterized in a rectangular channel with a hydraulic diameter 0.168 mm and the aspect ratio 0.1. Two-phase flow pressure drop and flow visualization were performed in the range of mass flux from 279 to 461 kg/m.s and vapour quality from 0.05 to 0.95. The measured pressure drops were compared with twelve existing correlations. The results showed that most of the correlations overpredict the experimental data. The flow visualization demonstrated that the flow patterns in the microchannel are similar to those in minichannels. The slug/plug flow and annular flow are the predominant flow regimes, and the bubble flow only occurs when quality is very low.
Details
- Original title: Pressure drop and visualization of R134a two-phase flow in a rectangular microchannel.
- Record ID : 2005-1136
- Languages: English
- Source: ASHRAE Transactions. 2003 Winter Meeting, Chicago, Illinois. Volume 109, part 1 + CD-ROM.
- Publication date: 2003
Links
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Indexing
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Themes:
HFCs;
Mass transfer;
Two-phase flow - Keywords: Two-phase flow; R134a; Imaging; Microchannel; Measurement; Heat transfer; Refrigerant; Pressure drop
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- Date : 2005/02
- Languages : English
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- Date : 2003/08/17
- Languages : English
- Source: 21st IIR International Congress of Refrigeration: Serving the Needs of Mankind.
- Formats : PDF
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- Date : 2007/08/21
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- Source: ICR 2007. Refrigeration Creates the Future. Proceedings of the 22nd IIR International Congress of Refrigeration.
- Formats : PDF
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- Author(s) : CLAESSON J., SIMANIC B.
- Date : 2003/08/17
- Languages : English
- Source: 21st IIR International Congress of Refrigeration: Serving the Needs of Mankind.
- Formats : PDF
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- Date : 2006/07/17
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- Source: 2006 Purdue Conferences. 18th International Compressor Engineering Conference at Purdue & 11th International Refrigeration and Air-Conditioning Conference at Purdue [CD-ROM].
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