Experimental Verification of a Method for Simultaneous Measurement of the Fouling Factor and Water Velocity inside a Condenser Tube

Kan ei Shinzato, Tetsu Fujii, Shigeru Koyama, Tadashi Nosetani

    Research output: Contribution to journalArticle

    Abstract

    The fouling factor and mean water velocity inside a condenser tube, which is artificially fouled, are simultaneously measured by means of local heating from the outside of the tube with two heaters of different lengths. The principle of the measurement is based on heat-transfer characteristics which depend on heater length. A titanium tube of 24.16 mm i.d. and an aluminum brass tube of 22.77 mm i.d. are used for the test. The test ranges of water velocity and fouling factor are 0.8-2.5 m/s and 0-2×10-4 m2K/W, respectively. Prior to the test, dimensionless relations among tube wall temperature at the heated area, mean water velocity and fouling factor along with their dependence on water temperature are derived from the results of numerical calculation of the temperature distribution near the heated area. The maximum errors for water velocity ΔU and fouling facter ΔR in the test are as follows; ΔU=2.4% for clean tubes, ΔR=0.5×10-5 m2K/W for given water velocity, and ΔR=2×10-5 m2K/W and ΔU=±20% for the simultaneous measurement.

    Original languageEnglish
    Pages (from-to)3772-3777
    Number of pages6
    JournalTransactions of the Japan Society of Mechanical Engineers Series B
    Volume55
    Issue number520
    DOIs
    Publication statusPublished - Jan 1 1989

    All Science Journal Classification (ASJC) codes

    • Condensed Matter Physics
    • Mechanical Engineering

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