Prediction of Condensation Heat Transfer Coefficient based on the Flow Pattern inside 4 mm Microfin Small-Diameter Tubes

DOI
  • HIROSE Masataka
    Maritime Technology Department, National Institute of Technology, Toba College
  • INOUE Norihiro
    Department of Marine Electronics and Mechanical Engineering, Tokyo University of Marine Science and Technology

Bibliographic Information

Other Title
  • 4 mm 細径溝付管内の流動様相に基づく凝縮熱伝達率の予測

Abstract

<p>In this paper, we classified into an annular region dominated by forced convection condensation and a wavy-slag region dominated by free convection condensation based on changes in flow pattern, using the experimental values of R123ze(E), R410A, R32 and R152a of previously paper (Hirose et al. 2019 and Hirose et al. 2018). Based on them, by detailed consideration for the effect of each mass velocity in annular flow region of the small-diameter tubes and surface tension due to tube diameter reduction in wavy-slag flow region on condensation heat transfer, we optimized the predicted correlation of condensation heat transfer coefficient for microfin small-diameter tubes. The optimized predicted correlation can be estimated within 30% our experimental values, and the tendency of other researchers’ experimental values, also the condensation heat transfer coefficient of 4 mm microfin small-diameter tubes for various refrigerants and fin geometries.</p>

Journal

Keywords

Details 詳細情報について

  • CRID
    1390574047041199360
  • DOI
    10.11322/tjsrae.21-03nk
  • ISSN
    2185789X
    13444905
  • Text Lang
    ja
  • Data Source
    • JaLC
  • Abstract License Flag
    Disallowed

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