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POST-DRYOUT HEAT TRANSFER TO R22 IN A VERTICAL TUBE AT HIGH SUBCRITICAL PRESSURES.

Author(s) : NISHIKAWA K.

Type of article: Article

Summary

STUDIES OF THE POST-DRYOUT HEAT TRANSFER WERE MADE BASED ON EXPERIMENTAL DATAOF THE HEAT TRANSFER TO R22 FLOWING UPWARD IN A VERTICAL, ROUND TUBE AT HIGH SUBCRITICAL PRESSURES (REDUCED PRESSURES OF 0.68-0.92). A CONVENTIONAL THEORETICAL MODEL FAILED IN PART TO REPRODUCE THE MEASURED WALL TEMPERATURE. A NONDIMENSIONAL PARAMETER WAS INTRODUCED TO A MODEL FOR THE POST-DRYOUT REGIME TO TAKE ACCOUNT OF THE THERMODYNAMIC NONEQUILIBRIUM BETWEEN THE VAPOUR AND THE LIQUID DROP-LETS. A CORRELATION WAS DEVELOPED AND A METHOD USING THIS CORRELATION WAS SUCCESSFUL IN PREDICTING THE WALL TEMPERATURE.

Details

  • Original title: POST-DRYOUT HEAT TRANSFER TO R22 IN A VERTICAL TUBE AT HIGH SUBCRITICAL PRESSURES.
  • Record ID : 1987-0061
  • Languages: English
  • Source: International Journal of Heat and Mass Transfer - vol. 29 - n. 8
  • Publication date: 1986

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