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Identification and digital control of a household refrigeration system with a variable speed compressor.

Identification et régulation numérique d'un système frigorifique domestique avec compresseur à vitesse variable.

Auteurs : PIEDRAHITA-VELASQUEZ C. A., CIRO-VELASQUEZ H. J., GOMEZ-BOTERO M. A.

Type d'article : Article, Article de la RIF

Résumé

This paper presents an autoregressive–moving-average model with exogenous inputs (ARMAX model) and a digital controller for a household refrigeration system that uses a variable speed compressor. The ARMAX model takes as inputs the RPM of the compressor and environmental variables, such as temperature and relative humidity. Additionally, the output variables were defined as the temperatures of the freezer, the evaporator plate, and the compartment air and the compartment air relative humidity. The results of the experimental tests showed that the ARMAX model reproduces with high accuracy the dynamic behavior of the refrigeration system with less than 7% error. Tests of energy consumption and food storage were performed according to the NTC 2078 standard, which applies to household refrigeration systems manufactured or sold in Colombia. These tests indicated that the refrigeration system with a variable speed compressor consumes 15% less energy than an equivalent conventional refrigeration system and that the temperature profiles inside the compartment are more stable.

Documents disponibles

Format PDF

Pages : 178-187

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 : Identification and digital control of a household refrigeration system with a variable speed compressor.
  • Identifiant de la fiche : 30012679
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 48
  • Date d'édition : 12/2014

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