Compound Heat Transfer Enhancement by a Combination of a Helically Ribbed Tube with Twisted Tape Inserts

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An experimental investigation on compound heat transfer enhancement by a combination of a helically ribbed tube with twisted tape inserts was performed. The measurement of heat transfer coefficient as well as the pressure drop was performed in order to evaluate the performance of enhanced tubes using the equal pumping power evaluation method. The heat transfer coefficient was obtained by means of Wilson’s method for the Reynolds number ranging from 300 to 30,000. The combination of smoothed tube and twisted tape having a clearance <I>NDC</I> = 0.07 accomplished the highest performance in the laminar region. On the other hand, the combination of helically ribbed tube and twisted tape having a clearance <I>NDC</I> = 0.02 gave the highest performance in the turbulent region. The reasons for these results are discussed well in terms of the compound effect and clearance effect.

収録刊行物

  • Journal of chemical engineering of Japan

    Journal of chemical engineering of Japan 36(9), 1116-1122, 2003-09-01

    公益社団法人 化学工学会

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各種コード

  • NII論文ID(NAID)
    10013414539
  • NII書誌ID(NCID)
    AA00709658
  • 本文言語コード
    ENG
  • 資料種別
    SHO
  • ISSN
    00219592
  • NDL 記事登録ID
    6731173
  • NDL 雑誌分類
    ZP1(科学技術--化学・化学工業)
  • NDL 請求記号
    Z53-R395
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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