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In-tube evaporation pressure-drop characteristics of R290 and R404A.

[In Chinese. / En chinois.]

Author(s) : HAN X., NAN X., LIU X., et al.

Type of article: Article

Summary

The experimental results of the in-tube evaporation pressure-drop of R290 and R404A in the horizontal smooth tube and the horizontal microfin tube were compared with calculation results by Lockhart & Martinelli pressure-drop correlation, respectively. Moreover, based on the experimental data of R290 and R404A, the Lockhart & Martinelli pressure-drop correlation was modified adequately. For R404A, the correlation shows good agreement with experimental values with mean deviation of -11.52% for the smooth tube and -17.86% for the microfin tube. Lockhart & Martinelli pressure drop correlation can also predict well the in-tube evaporation pressure-drop of R290 for the smooth tube with mean deviation of -21.68%. However, 2.06 to agree well with the experimental data should multiply the predicted value for the microfin tube by Lockhart & Martinelli correlation, and the mean deviation is 2.37%.

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Pages: 17-20

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Details

  • Original title: [In Chinese. / En chinois.]
  • Record ID : 2006-2845
  • Languages: Chinese
  • Source: Journal of Refrigeration - vol. 27 - n. 108
  • Publication date: 2006/04

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