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Régulation de la puissance des pompes à chaleur géothermiques. II. Analyse comparative des systèmes régulés de façon tout ou rien et des systèmes à puissance variable.

Capacity control in ground source heat pump systems. II. Comparative analysis between on/off controlled and variable capacity systems.

Auteurs : MADANI H., CLAESSON J., LUNDQVIST P.

Type d'article : Article, Article de la RIF

Résumé

In this paper, as the second part of two, modeling and simulation was carried out for a ground source heat pump (GSHP) system in the presence of all the most important interacting sub-systems such as building, ground heat source, electrical auxiliary heater, and the heat pump unit in order to make a fair and comprehensive comparison between the annual performance of on/off controlled and variable capacity systems. The annual modeling showed that dimensioning of the on/off controlled GSHP based on the peak heat demand of the building plays a significant role when the two control strategies are compared: if the on/off controlled GSHP is dimensioned to cover only 55% of the peak heat demand of the building, the electrical auxiliary, which then covers about 10% of the annual heating demand of the building, makes the SPF of the on/off controlled GSHP to be lower than the one of the variable speed system. On the contrary, when the on/off controlled system is dimensioned to cover more than 65% of the building’s peak heat demand, i.e. more than 95% of the annual heat demand of the building, there is no considerable difference between the SPFs of the on/off controlled and variable capacity systems.

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Pages : 1934-1942

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  • Prix public

    20 €

  • Prix membre*

    Gratuit

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Détails

  • Titre original : Capacity control in ground source heat pump systems. II. Comparative analysis between on/off controlled and variable capacity systems.
  • Identifiant de la fiche : 30002286
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 34 - n. 8
  • Date d'édition : 12/2011

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