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Condensation of refrigerants in horizontal microfin tubes: comparison of correlations for frictional pressure drop.

Author(s) : WANG H. S., ROSE J. W., HONDA H.

Type of article: Article, IJR article

Summary

This paper presents a comprehensive comparison of eight previously proposed correlations with available experimental data for the frictional pressure drop during condensation of refrigerants in helically grooved, horizontal microfin tubes. Calculated values are compared with experimental data for seven refrigerants (R11, R123, R134a, R22, R32, R125 and R410A) and eight tubes and with mass velocity from 78 to 459 kg/m² s. The tubes had inside diameter at the fin root between 6.41 and 8.91 mm; the fin height varied between 0.15 and 0.24 mm; the fin pitch varied between 0.34 and 0.53 mm and helix angle between 13 and 20°. The results show that the overall r.m.s. deviations of relative residuals of frictional pressure gradient for all tubes and all refrigerants taking together decreased in the order of the correlations of Nozu et al., Newell and Shah, Kedzierski and Goncalves, Cavallini et al., Goto et al., Choi et al., Haraguchi et al., and Goto et al., i.e., this final correlation gives the best overall representation of the data.

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Pages: 461-472

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Details

  • Original title: Condensation of refrigerants in horizontal microfin tubes: comparison of correlations for frictional pressure drop.
  • Record ID : 2003-1677
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 26 - n. 4
  • Publication date: 2003/06

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