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Mesurage en temps réel de la porosité au givre (densité) à l'aide d'un capteur capacitatif.

Real-time frost porosity (density) measurement using capacitive sensor.

Numéro : pap. 2468

Auteurs : SHEN Y., ZHANG Y., WANG X.

Résumé

In this work, a capacitance sensing approach has been developed to remote detect the frost porosity in real-time. An interdigital electrode was designed and fabricated to sense the capacitance changing during the frost growth based on the fringing effect. Frost growth under the same surface temperature, air temperature and relative humidity but different air velocity was observed. The averaged approach by measuring the frost mass and volume was also adopted for comparison. Result shows that the frost porosity measured by the capacitance sensing approach agrees well with the averaged measurement approach with a maximum difference of 12%. The capacitance sensing approach can measure the frost dielectric constant in good agreement with the prediction of the Maxwell-Garnett’s theory as well. This approach shows great potential for real-time precise frost detection and defrost control.

Documents disponibles

Format PDF

Pages : 8

Disponible

  • Prix public

    20 €

  • Prix membre*

    15 €

* meilleur tarif applicable selon le type d'adhésion (voir le détail des avantages des adhésions individuelles et collectives)

Détails

  • Titre original : Real-time frost porosity (density) measurement using capacitive sensor.
  • Identifiant de la fiche : 30024569
  • Langues : Anglais
  • Source : 2018 Purdue Conferences. 17th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Date d'édition : 09/07/2018

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