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Document IIF

Boucle au CO2 avec un couplage sol-eau comme source de chaleur pour les pompes à chaleur : premiers résultats de fonctionnement.

Ground-coupled horizontal CO2-loop as heat source for heat pumps: first operation results.

Auteurs : PRESETSCHNIK A., MITTERMAYR K., KOFINGER C., et al.

Résumé

Rising concern for the environmental effects of HFC-refrigerants has resulted in a need to decrease the refrigerant charge in refrigeration and heat pump systems. This issue might strengthen the position of indirect ground-coupled systems compared to direct expansion heat pump systems in the individual residential sector. The paper presents a horizontally installed ground coupled loop using carbon dioxide as secondary fluid as an alternative to conventional ground-coupled heat pumps with indirect systems using water-antifreeze mixtures. The objective of the work was to demonstrate the operational characteristics and performance of a heat pump system for tap water production installed in a single family house using a ground-coupled CO2-loop as the heat source. The results, based on measurements during the first month of operation, showed a performance factor of 3.1 for tap water production. The ongoing monitoring of the system will bring conclusions about the system performance and reliability for a longer time period.

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Pages : 2006-2

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  • Prix public

    20 €

  • Prix membre*

    Gratuit

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Détails

  • Titre original : Ground-coupled horizontal CO2-loop as heat source for heat pumps: first operation results.
  • Identifiant de la fiche : 2007-1742
  • Langues : Anglais
  • Source : 7th IIR-Gustav Lorentzen Conference on Natural Working Fluids (GL2006). Proceedings
  • Date d'édition : 29/05/2006

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