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Oil retention and pressure drop in horizontal and vertical suction lines with R410A/POE

Number: pap. n. R24, 2327

Author(s) : ZOELLICK K., HRNJAK P.

Summary

In refrigeration systems a small amount of compressor lubricant is entrained in the refrigerant and circulated through the system, where some is retained in each component. The suction line to the compressor has the largest potential for oil retention. This paper presents results from an experimental apparatus that has been constructed to circulate POE (polyolester) oil and R410A at a controlled mass flux, OCR (oil in circulation ratio), and superheat, and to directly measure the pressure drop and mass of oil retained in horizontal and vertical suction lines. The bulk vapor velocity and overall void fraction are determined from direct mass and temperature measurements. The oil retention, pressure drop, and flow regimes near the minimum ASHRAE recommended vapor velocity condition are explored, in order to better understand and define these conditions.

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Pages: 8 p.

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Details

  • Original title: Oil retention and pressure drop in horizontal and vertical suction lines with R410A/POE
  • Record ID : 30000988
  • Languages: English
  • Source: 2010 Purdue Conferences. 13th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Publication date: 2010/07/12

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