Partager

Document IIF

Développement d'un capteur microthermique pour le suivi en temps réel de la concentration en huile lubrifiante.

Development of a micro thermal sensor for real-time monitoring of lubricating oil concentration.

Auteurs : HONG J., CHANG Y. S., KIM D.

Type d'article : Article, Article de la RIF

Résumé

The authors report the development of a micro thermal sensor and sensing techniques for monitoring the oil concentration in a refrigeration system. The sensor acquires the thermal response of the mixture to ac heating and then the concentration can be determined using one of the two different methods. In the first method, the thermal conductivity of the mixture is obtained using the three-omega method and the concentration is determined using the correlation between the mixture concentration and thermal conductivity. In the alternative fast-detection method, the concentration is determined by directly calibrating the sensor output signal to the mixture concentration. The performance of the sensor was tested using the R410A/polyvinyl ether (PVE) oil mixture. The uncertainty of the oil concentration measurement was estimated to be 5.8-7.3 wt.%, depending on the sensing scheme. Especially, the simple structure of the sensor makes the technique cost effective and adequate for miniaturization, i.e., for installation in a limited space.

Documents disponibles

Format PDF

Pages : pp. 374-382

Disponible

  • Prix public

    20 €

  • Prix membre*

    Gratuit

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

Détails

  • Titre original : Development of a micro thermal sensor for real-time monitoring of lubricating oil concentration.
  • Identifiant de la fiche : 2010-1417
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 34 - n. 1
  • Date d'édition : 01/2011

Liens


Voir d'autres articles du même numéro (36)
Voir la source

Indexation