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Comparison of CHF measurements in horizontal and vertical tubes cooled with R134a.

Author(s) : PIORO I. L., GROENEVELD D. C., LEUNG L. K. H., et al.

Type of article: Article

Summary

The effect of orientation on CHF was found to depend on mass flux, quality and pressure, as well as on the limiting critical quality. This effect was strong at low mass fluxes, but disappeared at high mass fluxes. At qualities higher than the limiting critical qualities, the CHF in horizontal flow can be greater than the corresponding value in vertical flow under the same critical quality conditions. A maximum reduction in CHF due to flow stratification was observed at qualities between the limiting critical qualities for horizontal and vertical flows. The orientation effect on CHF appeared to be much stronger for R134a than for water.

Details

  • Original title: Comparison of CHF measurements in horizontal and vertical tubes cooled with R134a.
  • Record ID : 2004-0088
  • Languages: English
  • Source: International Journal of Heat and Mass Transfer - vol. 45 - n. 22
  • Publication date: 2002/10

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