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APPLICATION OF FLUX MEASUREMENT METHODS FOR THE EXPERIMENTAL ANALYSIS OF STATE CHANGES IN POROUS MEDIA.

APPLICATION DES METHODES FLUXMETRIQUES A L'ANALYSE EXPERIMENTALE DES CHANGEMENTS D'ETAT EN MILIEU POREUX.

Author(s) : OTER-DUTHOIT L., DUTHOIT B., THERY P.

Type of article: Article

Summary

THE ARTICLE DEVELOPS AN EXPERIMENTAL METHOD FOR STUDYING THE DEGRADED ENERGY IN FROST-DEFROST PROCESSES UNDERGONE BY WATER-SATURATED POROUS MEDIA. THE APPROACH MAKES IT POSSIBLE TO EXPRESS THE PRODUCED ENTROPY DURING A FROST-DEFROST CYCLEAS A FUNCTION OF MEASURABLE QUANTITIES. THIS ENTROPY RESULTS FROM THE SUM OF TWO CONTRIBUTIONS: EXCHANGE OF SENSIBLE HEAT AND OF LATENT HEAT. TO EXTRACT THE RESPECTIVE PARTS OF BOTH OF THEM, THE EXCHANGES OF SENSIBLE HEAT ARE REPRESENTED BY A LINEAR MODEL. SAMPLES OF POROUS LIMESTONE ARE USED FOR THE EXPERIMENTS. FIRSTLY, THE THERMOPHYSICAL PROPERTIES OF THE MATERIALS ARE CHARACTERIZED BY USING UNSTEADY-STATE FLUX MEASUREMENT TECHNIQUES. THEN THE LATENT PART OF THE EXCHANGES IS ISOLATED AND ANALYZED.

Details

  • Original title: APPLICATION DES METHODES FLUXMETRIQUES A L'ANALYSE EXPERIMENTALE DES CHANGEMENTS D'ETAT EN MILIEU POREUX.
  • Record ID : 1991-1835
  • Languages: French
  • Source: Entropie - vol. 26 - n. 159
  • Publication date: 1990
  • Document available for consultation in the library of the IIR headquarters only.

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