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Flow of R134a through micro-orifices.

Author(s) : TU X., HRNJAK P., BULLARD C.

Summary

The paper presents the experimental results for R134a flowing through micro-orifices with diameters of 31 and 52 microns, and length-to-diameter ratio of 2.5 and 4.2, respectively. For liquid flow without flashing, the experimental data were in rough agreement with macroscale results. The conventional orifice equation is still applicable. For liquid flow with flashing, the experimental results indicate significant differences: the flow was not choked even when downstream pressure was reduced to more than 400 kPa below saturation pressure corresponding to inlet temperature. Semi-empirical model was developed based on correction of the orifice equation.

Details

  • Original title: Flow of R134a through micro-orifices.
  • Record ID : 2003-1137
  • Languages: English
  • Source: 2002 Purdue conferences. 2002 compressor engineering & refrigeration and air conditioning conferences at Purdue [CD-ROM].
  • Publication date: 2002/07/16
  • Document available for consultation in the library of the IIR headquarters only.

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