Journal
ENERGY CONVERSION AND MANAGEMENT
Volume 43, Issue 17, Pages 2319-2327Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0196-8904(01)00183-2
Keywords
electrocaloric refrigeration cycle; dielectric material; specific heat; regenerative characteristic
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The thermodynamic properties of the dielectric materials are analyzed in detail, based on the Curie law, Curie-Weiss law and other relations between the electrical polarization and the electric field strength. It is proven that the specific heat at constant electrical polarization is only a function of temperature, while the specific heat at constant electric field strength is dependent on the electric field strength and temperature. Moreover, the regenerative characteristics of the electrocaloric Stirling and Ericsson refrigeration cycles are discussed. Some important conclusions are obtained. (C) 2002 Published by Elsevier Science Ltd.
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