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Document IIF

Régulation de la surchauffe par détecteur de température unique utilisant une méthode innovante de recherche de la pente maximale de la courbe.

Single temperature sensor superheat control using a novel maximum slope-seeking method.

Auteurs : VINTHER K., RASMUSSEN H., IZADI-ZAMANABADI R., et al.

Type d'article : Article, Article de la RIF

Résumé

Superheating of refrigerant in the evaporator is an important aspect of safe operation of refrigeration systems. The level of superheat is typically controlled by adjusting the flow of refrigerant using an electronic expansion valve, where the superheat is calculated using measurements from a pressure and a temperature sensor. In this paper we show, through extensive testing, that the superheat or filling of the evaporator can actually be controlled using only a single temperature sensor. This can either reduce commissioning costs by lowering the necessary amount of sensors or add fault tolerance in existing systems if a sensor fails (e.g. pressure sensor). The solution is based on a novel maximum slope-seeking control method, where a perturbation signal is added to the valve opening degree, which gives additional information about the system for control purposes. Furthermore, the method does not require a model of the system and can be tuned automatically.

Documents disponibles

Format PDF

Pages : 1118-1129

Disponible

  • Prix public

    20 €

  • Prix membre*

    Gratuit

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Détails

  • Titre original : Single temperature sensor superheat control using a novel maximum slope-seeking method.
  • Identifiant de la fiche : 30008042
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 36 - n. 3
  • Date d'édition : 05/2013

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