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Evaluation of void fraction prediction methods for two-phase flow evaporative pressure drop of R744 and R290 in horizontal small tubes.

Number: pap. D1-041

Author(s) : CHOI K. I., PAMITRAN A. S., OH J. T., et al.

Summary

An experimental study on two-phase flow boiling pressure drop with R744 and R290 in horizontal circular small tubes to evaluate void fraction prediction methods is presented. The experimental data were obtained over a heat flux range of 5 to 30 kW/m2, mass flux range of 50 to 600 kg/m2.s, saturation temperature range of 10°C, and quality up to 1.0. The test section was made of stainless steel tubes with inner diameters of 1.5 and 3.0 mm, and length of 2000 mm. The experimental pressure drop was compared with some existing pressure drop correlations. Existing void fraction prediction methods were evaluated for the two-phase flow evaporative pressure drop. A new pressure drop correlation using homogenous void fraction model is developed.

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Pages: 7 p.

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Details

  • Original title: Evaluation of void fraction prediction methods for two-phase flow evaporative pressure drop of R744 and R290 in horizontal small tubes.
  • Record ID : 30005392
  • Languages: English
  • Source: ACRA2010. Asian conference on refrigeration and air conditioning: Tokyo, Japan, June 7-9, 2010.
  • Publication date: 2010/06/07

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