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IIR document

Boiling heat transfer performance of three internally enhanced tubes using R22.

Number: pap. n. 158

Author(s) : OUYANG X., CHEN J., LI T.

Summary

The experimental study was carried out on the boiling heat transfer of R22 flowing inside three internal thread tubes with different geometrical parameters. Three enhanced tubes have the same inner and outer diameter, but the helix angle, the height and width of the thread and other parameters are different. The relationship between the heat transfer performance and the mass velocity of the three tubes and a smooth tube was tested by changing the mass velocity of refrigerant respectively in a given condition of import and export of refrigerant, and the performance comparison results have been conducted. Experimental results indicate that, the heat transfer coefficients of three internal thread tubes are 60% ~ 80%, 80% ~ 120% and 80% higher than the smooth tube, respectively; the performance of the second tube is the best. The influence of thread parameters on the performance of boiling heat transfer is analyzed.

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Pages: 8 p.

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Details

  • Original title: Boiling heat transfer performance of three internally enhanced tubes using R22.
  • Record ID : 30015322
  • Languages: English
  • Source: Proceedings of the 24th IIR International Congress of Refrigeration: Yokohama, Japan, August 16-22, 2015.
  • Publication date: 2015/08/16
  • DOI: http://dx.doi.org/10.18462/iir.icr.2015.0158

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