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Étude expérimentale de l’effet de l’optimisation de la charge et des conditions de test standardisées sur les performances saisonnières d’une pompe à chaleur au R410A avec un sous-refroidisseur dédié.

Experimental investigation into the effect of charge optimization and standard test conditions on the seasonal performance in an R410A heat pump with dedicated subcooler.

Numéro : 0506

Auteurs : INAMPUDI S., ELBEL S.

Résumé

There is an increased focus on the amount of refrigerant charge used in the HVAC&R systems due to the new restrictions and ongoing phase down of high GWP refrigerants as part of the F-gas regulation. In the current study, seasonal performance for a variable speed compressor in an R410A water ethylene glycol (WEG) heat pump system having a nominal heating capacity of 9 kW is estimated according to EU 14825. This study experimentally studied the effect of charge and the fixed/variable outlet condition on the seasonal performance of the water heat pump equipped with a variable speed compressor. The results of a charge optimization done at part load conditions show an unexpected peak in 𝐶𝑂𝑃𝑑𝑒𝑐 and results indicates that optimum charge has a higher impact on the efficiency at part load conditions than the nominal conditions. Based on the experimental results, the difference in the order of 5% in 𝑆𝐶𝑂𝑃 is found when comparing optimum charge and non-optimum charge in a variable speed compressor. 𝑆𝐶𝑂𝑃 can change by almost 22% depending on whether fixed/variable condenser temperature outlet operation is used.

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Pages : 12

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Détails

  • Titre original : Experimental investigation into the effect of charge optimization and standard test conditions on the seasonal performance in an R410A heat pump with dedicated subcooler.
  • Identifiant de la fiche : 30033256
  • Langues : Anglais
  • Source : 14th IEA Heat Pump Conference 2023, Chicago, Illinois.
  • Date d'édition : 05/2023

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