HeatTransfer Coefficients and Pressure Drops of The Finned Tube Heat Exchangers with Small Diameter Pipes

DOI
  • TANAKA Hiroyoshi
    Matsushita Electric Industrial Co. Central Research Laboratories (3-15 Yagumo Nakamachi Moriguchi City 570)
  • AOYAMA Shigeo
    Matsushita Refrigeration Co. Engineering Center (3-22 Takaida Hondouri Higashisaka City 577)
  • KOMA Hachirou
    Matsusita Refrigeration Co. Heat Transfer Coil Divison (2275 Noji-Cho Kusatsu City 525)
  • ADACHI Masaaki
    Matsushita Electric Industrial Co. Central Research Laboratories (3-15 Yagumo Nakamachi Moriguchi City 570)

Bibliographic Information

Other Title
  • 細管径フィンチューブ熱交換器の熱伝達率と圧力損失

Abstract

In order to enhance the heat transfer coefficient of the fin used in the finned tube heat exchanger, newly designed fin surfaces, especially, with small diameter (≅4mm) pipes are developed. The experiments are made by the transient testing technique, and used the plastic fins scaling up 4 times of the actual metal fin size. The data of the heat transfer coefficient and the pressure drop are transformed to the actual metal fin data.<br>The fin with the anomalous staggered pipe arrangement and the bridge-like cutting-out with inclined leg portion from stream line is found to have very high overall heat transfer coefficient which is about 1.8-fold increase in comparison with the conventional Louvered fin.<br>In this paper the reason why such enhancement is caused is clarified by mean of the calculation based on the rectangular duct flow. The calculated values are coincident with the data of the experiment well.

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Keywords

Details 詳細情報について

  • CRID
    1390282679641647360
  • NII Article ID
    130004566324
  • DOI
    10.11322/tjsrae.5.359
  • ISSN
    2185789X
    13444905
  • Text Lang
    ja
  • Data Source
    • JaLC
    • CiNii Articles
  • Abstract License Flag
    Disallowed

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