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Étude expérimentale de la pompe à chaleur avec compresseur à vitesse variable pour les applications domestiques à charge thermique.

Experimental study of the heat pump with variable speed compressor for domestic heat load applications.

Numéro : 1395

Auteurs : ABID M., HEWITT N., HUANG M. J., WILSON C., COTTER D.

Résumé

Capacity control for heat pump (HP) systems is essential to efficiently meet variable heating loads in domestic buildings. A low-to-medium temperature hot water supply within a 30 oC-55 oC range is commonly required for domestic heating load applications. In this study, the performance of a variable speed air source heat pump (ASHP) system was studied in the laboratory under a series of ambient conditions at -2 oC, 2 oC, 7 oC and 15oC, examining performance at different water supplying temperatures (WST) of 30 oC, 35 oC, 40 oC, 45 oC, 50 oC, and 55 oC. The performance of the variable speed HP system was evaluated in a conditioning chamber at the above-mentioned ambient temperatures and corresponding humidity levels as per BS EN 14511 standards. The HP performance at six different heating capacities of 18kW, 15kW,12kW, 9kW, 6kW, and 3kW was measured and evaluated via co-efficient of performance (CoP) values. The CoP values changes according to the load, water supply temperature (WST) and ambient temperature conditions. The CoP values for fixed ambient temperature conditions and WST i.e., 7 oC and WST 30 oC (7A30W) at 15kW, 12kW, 9kW, 6kW, and 3kW were found to be 3.56, 3.83,4.35, 4.19, and 3.39, respectively. The corresponding frequency of operation was 112.25Hz, 105.87Hz, 81.57Hz, 61.05Hz, 37.64Hz, 18.75 Hz with an absolute percentage difference of 87.01%, 76.45%, 35.95%, 1.75%, 37.26%, and 68.75% to that of the nominal frequency of 60Hz. The trend was similar by changing WST to 35 oC, 40 oC, 45 oC, 50 oC and 55 oC, but with lower CoP values and a smaller variation range. The difference between water inlet and supply temperature (delta T) is another important parameter in domestic heat load applications, and this study also presents results of comparative testing of delta T of 5, 10 and 20 at ambient conditions of 15 oC for WST of 40 oC, 45 oC, 50 oC, and 55 oC. The experimental results indicate that this variable speed-based HP system has the potential to meet different domestic heating demands within a range of WST and ambient conditions.

Documents disponibles

Format PDF

Pages : 10

Disponible

  • Prix public

    20 €

  • Prix membre*

    15 €

* meilleur tarif applicable selon le type d'adhésion (voir le détail des avantages des adhésions individuelles et collectives)

Détails

  • Titre original : Experimental study of the heat pump with variable speed compressor for domestic heat load applications.
  • Identifiant de la fiche : 30028378
  • Langues : Anglais
  • Sujet : Technologie
  • Source : 2021 Purdue Conferences. 25th International Compressor Engineering Conference at Purdue.
  • Date d'édition : 05/2021
  • Document disponible en consultation à la bibliothèque du siège de l'IIF uniquement.

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