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Effects of oil on boiling of replacement refrigerants flowing normal to a tube bundle. 2. R134a.

Author(s) : TATARA R. A., PAYVAR P.

Summary

Local, experimental heat transfer coefficients have been obtained for boiling refrigerant flowing up and across a tube bundle segment representing a full flooded evaporator tube bundle. This tube has reentrant cavities designed for higher saturation pressure refrigerants. The refrigerant enters at 15% vapour quality and exits at nearly 100% vapour in order to simulate an actual evaporator bundle. Both heat flux and oil content, 0 to 12% (by weight), are varied; the mass flux is not an independent variable but determined by the heat flux. Local tube and bulk fluid temperatures are measured directly, by thermocouples.

Details

  • Original title: Effects of oil on boiling of replacement refrigerants flowing normal to a tube bundle. 2. R134a.
  • Record ID : 2001-0689
  • Languages: English
  • Source: ASHRAE Transactions. 2000 Winter Meeting, Dallas, Texas + CD-ROM.
  • Publication date: 2000

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