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Simulation unidimensionnelle d'un échangeur de chaleur afin de capter les phénomènes transitoires des appareils frigorifiques domestiques fonctionnant au R600a.

1D heat exchanger simulation to capture the cycling transients of domestic refrigeration appliances working with R600a.

Numéro : pap. 2452

Auteurs : BERGER E., HEIMEL M., ALMBAUER R., et al.

Résumé

To further increase the energy efficiency of domestic refrigeration systems, it is not sufficient anymore to optimize the single cycle components on their own. On the contrary, due to the strong system interactions, an integral consideration of the whole cooling cycle is necessary to capture the system dynamics in detail and to understand them. Just by understanding the occurring physical effects, loss mechanisms can be identified and efficient optimizing measures could be taken. In this work a transient model for the simulation of the evaporator and the condenser of domestic refrigeration appliances, based on the finite volume method is presented. The requirements for cycle simulations differ from design or optimization problems because the models have to be as fast as possible so that the computational results can be used as boundary conditions for the simulation of the other components. Thus, it is challenging to find a satisfying trade-off between the computation speed and the accuracy of the results. The developed algorithm solves the governing equations for mass and energy in combination with some simplifying assumptions (e.g. 1-dimensional fluid flow, negligence of the pressure drop, homogeneous two-phase flow) which have been necessary to keep the computation time within limits.

Documents disponibles

Format PDF

Pages : 9 p.

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 : 1D heat exchanger simulation to capture the cycling transients of domestic refrigeration appliances working with R600a.
  • Identifiant de la fiche : 30006748
  • Langues : Anglais
  • Source : 2012 Purdue Conferences. 14th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Date d'édition : 16/07/2012

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