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THERMAL PERFORMANCE OF A SCRAPED SURFACE HEAT EXCHANGER. 2. EFFECT OF AXIAL HEAT DIFFUSION ON THERMAL PERFORMANCE.

PERFORMANCES THERMIQUES D'UN ECHANGEUR DE CHALEUR A SURFACE RACLEE. 2. INFLUENCE DE LA DIFFUSION AXIALE DE CHALEUR SUR LES PERFORMANCES THERMIQUES.

Author(s) : MAINGONNAT J. F., CORRIEU G.

Type of article: Article

Summary

AXIAL HEAT DIFFUSION AFFECTS THE AVERAGE TEMPERATURE DIFFERENCE BETWEEN THE TWO FLUIDS. IT IS EVIDENCED BY MEASURING THE TEMPERATURE OF THE PRODUCT AND IT IS CHARACTERISED BY THE SUDDEN INCREASE IN THE TEMPERATURE UNDERGONE BY THE PRODUCT JUST AFTER ITS ADMISSION. AN INCREASE IN THE RPM AND THE NUMBER OF BLADES AND A DECREASE IN FLOW RATE ACCENTUATES THIS PROCESS. THE RATE OF TEMPERATURE INCREASE OF THE PRODUCT AT THE INLET OF THE EXCHANGER, PROPORTIONAL TO A RATIO OF VELOCITY AT THE END OF BLADES TO THE AVERAGE AXIAL VELOCITY OF THE PRODUCT IS USED FOR CORRELATING THE ERROR MADE WHEN THE AVERAGE TEMPERATURE DIFFERENCE IS OVERESTIMATED. THIS ERROR PASSES ON THE CALCULATION OF THE HEAT TRANSFER COEFFICIENT MADE FROM OVERALL HEAT BALANCES.

Details

  • Original title: PERFORMANCES THERMIQUES D'UN ECHANGEUR DE CHALEUR A SURFACE RACLEE. 2. INFLUENCE DE LA DIFFUSION AXIALE DE CHALEUR SUR LES PERFORMANCES THERMIQUES.
  • Record ID : 1984-0518
  • Languages: French
  • Source: Entropie - vol. 19 - n. 111
  • Publication date: 1983
  • Document available for consultation in the library of the IIR headquarters only.

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