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Enhanced pool boiling of propane on horizontal U-shaped tubes in a large-scale confined space.

Author(s) : TIAN Z., WANG F., GU B., ZHANG Y., GAO W.

Type of article: IJR article

Summary

This paper aims to experimentally investigate the heat transfer characteristics of pool boiling on horizontal U-shaped tubes in a large-scale confined space. The saturation temperature ranges from 20 to 40°C and the heat flux varies from 2.5 to 10.5 kWm−2. Two types of tubes with an outside diameter of 19.05 mm are tested: a smooth tube and a fin-enhanced tube with 0.4 mm fin height, 1220 fpm (fins per meter) and a 0.12 mm fin gap. The tubes are made of titanium with a length of 1165 mm. In case of pool boiling, the heat transfer coefficient for the tested tubes increases with increasing saturation temperature and heat flux. The fin-enhanced tube facilitates the bubble nucleation with the heat transfer coefficient enhancement factor varying in the range of 1.25∼2.28. Furthermore, the experimental heat transfer coefficients are compared with four correlations obtained in the open literature. R-J correlation and Copper correlation are found to be the optimum correlation for the smooth tube and the enhanced tube with the mean relative error of 10.93% and 11.48%, respectively. Findings from this study can supply a fundamental basis for validation and improvement propane heat transfer performances for the intermediate fluid vaporizer (IFV) engineering design.

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Pages: 19-29

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Details

  • Original title: Enhanced pool boiling of propane on horizontal U-shaped tubes in a large-scale confined space.
  • Record ID : 30029247
  • Languages: English
  • Subject: Technology
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 133
  • Publication date: 2022/01
  • DOI: http://dx.doi.org/10.1016/j.ijrefrig.2021.09.026
  • Document available for consultation in the library of the IIR headquarters only.

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