花弁状管による三重管式熱交換器の伝熱促進

DOI Web Site

書誌事項

タイトル別名
  • Heat transfer Enhancement of Triple Tube Type Heat Exchanger by Petal Shaped Tube

抄録

<p>From the viewpoint of energy conservation the heat transfer enhancement of heat exchanger is also desired. The conventional circular double tube type heat exchanger, CP-tube, is one of the compact one with a high heat transfer performance. The authors discussed the heat transfer performance of double tube type heat exchanger (pipe outer diameter: 22.0 [mm], pipe length: 2.4 [m]) with petal shaped special inner tube having a large wet perimeter. The 6 petal shaped inner tube, 6P-tube, 5P-tube, 5P’-tube with a shallow petal and CP-tube were used, and it was made clear that 5P-tube has an excellent heat transfer performance. In this study, in order to improve and enhance the heat transfer performance of 5P-tube more the decrease of a large pressure loss of outer tube will be discussed using a triple tube, 5P-tri-tube, and will be shown the excellent heat transfer performance of it. The hot water of 60 [°C] flowed in the inner tube and cold water of 20 [°C] flowed in middle and outer tubes as countercurrent flow. As a result, it was shown that for example, at a low Reynolds number of Reh =4,000 the 5P-tri-tube have an excellent heat transfer efficiency η of 2.84 times of 5P-tube (where, η of 5P-tube is 2.1 times of CP-tube).</p>

収録刊行物

  • 年次大会

    年次大会 2018 (0), J0520401-, 2018

    一般社団法人 日本機械学会

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ