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Modélisation numérique et validation expérimentale d’un refroidisseur électrocalorique régénératif.

Numerical modelling and experimental validation of a regenerative electrocaloric cooler.

Auteurs : PLAZNIK U., VRABELJ M., KUTNJAK Z., et al.

Type d'article : Article, Article de la RIF

Résumé

This paper reports on the research and development of a cooling device with an active electrocaloric regenerator (AER) based on the bulk ceramic material (1-x)Pb(Mg1/3Nb2/3)O3–xPbTiO3 (PMN-100xPT). For the purposes of the study a 2D transient numerical model of the AER was developed. This model makes it possible to investigate the cooling characteristics of a device with an AER while considering the effect of the hysteresis of the electrocaloric material and the effect of the electric-energy recovery related to the polarization/depolarization process. The results of the numerical analyses show that the degree of electric energy recovery has a major impact on the efficiency of the device. By considering an idealised system for electric-energy recovery the energy efficiency (expressed by the coefficient of performance) of the device could be increased by up to ten times. A validation of the numerical model was performed through the design, construction and experiments on an improved AER cooling device. The results revealed a maximum specific cooling power of 16?W kg-1 and a maximum temperature span of 3.1?K for the new device.

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Pages : 139-149

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Détails

  • Titre original : Numerical modelling and experimental validation of a regenerative electrocaloric cooler.
  • Identifiant de la fiche : 30025374
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 98
  • Date d'édition : 02/2019
  • DOI : http://dx.doi.org/10.1016/j.ijrefrig.2018.10.029

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