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Développement d'une pompe à chaleur à compresseur et détendeur combinés : évaluation expérimentale du compresseur et du détendeur.

Developing a combined compressor expander heat pump: experimental evaluation of the compressor and expander.

Numéro : pap. ID: 238

Auteurs : SALEHI KOUHESTANI M., HEWITT N. J., HUANG M. J.

Résumé

This study outlines the integration of a new rotary compressor-expander combined unit within a water-to-water heat pump to achieve higher coefficient of performance (COP) and heating capacity. This is particularly true when the heat pump operates as a retrofit unit operating at higher temperatures (>55°C) typically encountered in standard UK heating systems. In a refrigeration cycle, the expansion process is performed as an isenthalpic process which typically causes the refrigerant to enter the evaporator with approximate quality of 25% or more and this refrigerant is therefore unavailable for heat transfer in the evaporator. In this research, the aim is to improve the isentropic efficiency of expansion process by applying a rotary expander compressor which has an integrated turbine. A higher isentropic efficiency in expansion process leads to higher heating capacity by absorbing more heat in evaporator. Also the turbine can supply between 5-15% of compressor input power from the expansion process, so a higher COP will be achievable.

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Format PDF

Pages : 8 p.

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    20 €

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    Gratuit

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Détails

  • Titre original : Developing a combined compressor expander heat pump: experimental evaluation of the compressor and expander.
  • Identifiant de la fiche : 30002319
  • Langues : Anglais
  • Source : Proceedings of the 23rd IIR International Congress of Refrigeration: Prague, Czech Republic, August 21-26, 2011. Overarching theme: Refrigeration for Sustainable Development.
  • Date d'édition : 21/08/2011

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