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Document IIF

Etude expérimentale et numérique du phénomène de pompage dans les évaporateurs munis de détendeurs thermostatiques.

An experimental and numerical study of hunting in thermostatic-expansion-valve-controlled evaporators.

Auteurs : MITHRARATNE P., WIJEYSUNDERA N. E.

Type d'article : Article, Article de la RIF

Résumé

The dynamic behaviour of a thermostatic-expansion-valve (TEV)-controlled dry-evaporator is studied experimentally and numerically. Although the linear model of the TEV together with the distributed model of the evaporator is able to predict the stable dynamic response of the system adequately, it fails to reproduce the hunting behaviour that is observed under certain operating conditions. A scrutiny of the experimental data reveals the possible existence of hysteresis in the system. The distributed model including the experimentally determined input-output characteristics of the TEV is able to reproduce the main features of the hunting oscillations well. The amplitude and frequency of these oscillations depend on the static superheat setting, the heat load of the evaporator and the time constant of the TEV bulb.

Documents disponibles

Format PDF

Pages : 992-998

Disponible

  • Prix public

    20 €

  • Prix membre*

    Gratuit

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Détails

  • Titre original : An experimental and numerical study of hunting in thermostatic-expansion-valve-controlled evaporators.
  • Identifiant de la fiche : 2003-0742
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 25 - n. 7
  • Date d'édition : 11/2002

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