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EVALUATION AND IMPROVEMENT OF CONTACT THERMAL RESISTANCE ON THE FIN COLLAR OF THE FINNED-HEAT EXCHANGER.

[In Japanese. / En japonais.]

Author(s) : YAMADA E., MATSUI M.

Type of article: Article

Summary

BY OBTAINING THE CALIBRATION CURVES OF TEMPERATURE DIFFERENCES VS THERMAL RESISTANCE (THERMAL CONDUCTANCE) BETWEEN THE FIN COLLAR AND THE PIPE SURFACE, IT MAY BE POSSIBLE TO EVALUATE THE CONTACT RESISTANCE BY A SIMPLE EXPERIMENT. BY MEASURING THE CONTACT LENGTH BETWEEN THE FIN COLLAR AND THE PIPE, IT IS CLEAR THAT AN OPTIMUM EXPANSION RATIO OF THE PIPE EXISTS ON THE FIN-TYPE HEAT EXCHANGER. IT HAS BEEN CONFIRMED EXPERIMENTALLY THAT, BY USING A STRAIGHT COLLAR WITH THE FLARE PART REMOVED, A CONTACT STATE BETWEEN FIN COLLAR AND PIPE WAS OBTAINED, WHICH WAS BETTER THAN THE CASE EMPLOYING THE FLARED COLLAR.

Details

  • Original title: [In Japanese. / En japonais.]
  • Record ID : 1991-0606
  • Languages: Japanese
  • Source: Trans. JAR - vol. 6 - n. 1
  • Publication date: 1989
  • Document available for consultation in the library of the IIR headquarters only.

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