Partager

Expressions analytiques des débits optimaux dans les évaporateurs et les condenseurs des systèmes à pompe à chaleur.

Analytical expressions for optimum flow rates in evaporators and condensers of heat pumping systems.

Auteurs : GRANRYD E.

Résumé

The flow velocities on the air or liquid side of evaporators and condensers in refrigeration or heat pump systems can often be chosen rather freely. This choice affects performance of the system considerably. The purpose of the paper is to show analytical relations indicating possible different optimum operating conditions. Considering a base case where the design data are known, simple analytical relations are deduced for optimum flow rates resulting in highest overall COP of the system when power for the compressor as well as pumps or fans are included. This solution is equivalent to the solution for minimum total energy demand for the operation at given cooling load. It is also shown that a different (and higher) flow rate will result in maximum net cooling capacity for a refrigerating system with fixed compressor speed. The expressions can be used for design purposes, but also to check if the there are reasons to adjust flow velocities in order to save energy in an existing system. The relations my also be incorporated in algorithms for optimal operation of systems with variable speed compressors.

Documents disponibles

Format PDF

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 : Analytical expressions for optimum flow rates in evaporators and condensers of heat pumping systems.
  • Identifiant de la fiche : 2011-0321
  • Langues : Anglais
  • Source : IIR/Eurotherm sustainable refrigeration and heat pump technology conference. Proceedings of the Eurotherm Seminar No. 88, Stockholm, Sweden, June 13-16, 2010.
  • Date d'édition : 13/06/2010

Liens


Voir d'autres communications du même compte rendu (49)
Voir le compte rendu de la conférence

Indexation