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THEORETICAL AND EXPERIMENTAL STUDY OF HEAT EXCHANGERS OPERATING IN UNSTEADY STATE. SIMULATION OF THE RESPONSE TO A STEP FUNCTION.

ETUDE THEORIQUE ET EXPERIMENTALE DES ECHANGEURS EN REGIME THERMIQUE INSTATIONNAIRE. SIMULATION D'UNE PHASE DE RELAXATION.

Author(s) : PIERSON P., PADET J.

Type of article: Article

Summary

A THEORETICAL MODEL IS PROPOSED, BASED ON EXPERIMENTAL OBSERVATIONSWHICH SHOW THAT, AFTER A SHORT DELAY, THE RESPONSE CAN EASILY BE SIMULATED WITH AN EXPONENTIAL LAW, CHARACTERIZED BY ONLY ONE TIME CONSTANT T. THE HEAT BALANCE OF THE HEAT EXCHANGER ELEMENTS LEADS TO A SIMPLE AND ANALYTICAL EXPRESSION OF T, WHICH IS A FUNCTION OF THE ELEMENTS' CHARACTERISTICS (GEOMETRY, MATERIALS) AND THE WORKING CONDITIONS. THE EXPRESSION OBTAINED HAS BEEN CHECKED THROUGH EXPERIMENTS (CONCENTRIC PIPE HEAT EXCHANGER) AND THE RESULTS OF OTHER AUTHORS.

Details

  • Original title: ETUDE THEORIQUE ET EXPERIMENTALE DES ECHANGEURS EN REGIME THERMIQUE INSTATIONNAIRE. SIMULATION D'UNE PHASE DE RELAXATION.
  • Record ID : 1989-0524
  • Languages: French
  • Source: International Journal of Heat and Mass Transfer - vol. 31 - n. 8
  • Publication date: 1988

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