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Système de régulation fondé sur un modèle à plusieurs variables pour les systèmes frigorifiques à compression de vapeur.

A model-driven multivariable controller for vapour compression refrigeration systems.

Auteurs : SCHURT L. C., HERMES C. J. L., TROFINO NETO A.

Type d'article : Article, Article de la RIF

Résumé

A model-driven controller for vapour compression refrigeration systems is presented herein. Mathematical sub-models were developed for each of the system components: heat exchangers (condenser and evaporator), variable-speed compressor and variable-orifice electric expansion device. The overall system simulation model was used to design a MIMO controller based on the linear-quadratic Gaussian method using a state observer of the Kalman filter type. A purpose-built testing apparatus comprised of a variable-speed compressor and a pulse-width modulated expansion valve was used to collect data for the system identification and model validation exercises. It was found that the model reproduces the experimental trends of the working pressures in conditions far from the operation point (plus or minus 30%) with a maximum deviation of plus or minus 5%. Additional experiments were also performed to verify the ability of the controller of tracking reference changes and rejecting thermal load disturbances as high as 15%.

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Pages : pp. 1672-1682

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Détails

  • Titre original : A model-driven multivariable controller for vapour compression refrigeration systems.
  • Identifiant de la fiche : 2009-1994
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 32 - n. 7
  • Date d'édition : 11/2009

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