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GRAVITY-ASSISTED HEAT PIPES USING MICRO-FIN TUBES FOR APPLICATIONS IN AIR-TO-AIR HEAT EXCHANGERS.

Author(s) : GERSEY C. O., SHAPIRO H. N., PATE M. B.

Summary

THE STUDY COMPARES THE HEAT TRANSFER CHARACTERISTICS OF GRAVITY-ASSISTED HEAT PIPES CONSTRUCTED FROM MICRO-FIN AND SMOOTH TUBES. ENERGY WAS ADDED AT THE BOTTOM AND EXTRACTED AT THE TOP OF THE GRAVITY-ASSISTED HEAT PIPE BY WATER FLOWING IN SURROUNDING ANNULI. WITH R11, HEAT TRANSFER RATES WERE MEASURED FOR A VARIETY OF CHARGE LEVELS, VARIOUS EVAPORATOR TEMPERATURES AND EVAPORATOR-TO-CONDENSER INLET WATER TEMPERATURE DIFFERENCES. THE HEAT TRANSFER RATE IN THE SMOOTH TUBE GRAVITY-ASSISTED HEAT PIPE WAS FOUND TO BE INDEPENDENT OF EVAPORATOR TEMPERATURE ANDR11 CHARGE FOR THE LEVELS RANGING FROM 44 TO 102 % OF THE EVAPORATOR SECTION VOLUME. IN THE MICRO-FIN TUBE IT INCREASED FOR LARGER EVAPORATOR TEMPERATURES AND ALSO VARIED WITH CHARGE LEVEL. IT WAS A MAXIMUM AT A CHARGE LEVEL OF 29 % OF THE EVAPORATOR VOLUME.

Details

  • Original title: GRAVITY-ASSISTED HEAT PIPES USING MICRO-FIN TUBES FOR APPLICATIONS IN AIR-TO-AIR HEAT EXCHANGERS.
  • Record ID : 1992-0555
  • Languages: English
  • Publication date: 1990
  • Source: Source: ASHRAE Trans.
    vol. 96; n. 2; 148-157; 13 fig.; 1 tabl.; 17 ref.; discuss.
  • Document available for consultation in the library of the IIR headquarters only.

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