Heat Transfer Enhancement for Gravity Controlled Condensation on a Horizontal Tube by a Coiled Wire

Tetsu Fujii, Wei Cheng Wang, Shigeru Koyama, Yōichi Shimizu

    Research output: Contribution to journalArticle

    6 Citations (Scopus)

    Abstract

    Heat transfer coefficient in gravity controlled condensation on a horizontal tube is enhanced by coiling a wire around the tube, because the condensate film between the coiled wires thins. An analytical solution is derived from simplified simultaneous differential equations. Two coefficients which are contained in the solution are determined from experimental results for Rh and ethanol vapours. Maximum heat transfer coefficient is obtained at the ratio of pitch to diameter of wire equal to two, and the increment ratio to a smooth tube is inversely proportional to one-fourth power of capillary constant. The present device will be useful to the condenser for organic substances.

    Original languageEnglish
    Pages (from-to)2436-2441
    Number of pages6
    JournalNihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
    Volume51
    Issue number467
    DOIs
    Publication statusPublished - Jan 1 1985

    All Science Journal Classification (ASJC) codes

    • Condensed Matter Physics
    • Mechanical Engineering

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