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  4. Phenomenological Material Model for First-Order Electrocaloric Material
 
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2023
Journal Article
Title

Phenomenological Material Model for First-Order Electrocaloric Material

Abstract
Caloric cooling systems are potentially more efficient than systems based on vapour compression. Electrocaloric cooling systems use a phase transformation from the paraelectric to the ferroelectric state by applying or removing an electric field to pump heat. Lead scandium tantalate (PST) materials show a first-order phase transition and are one of the most promising candidates for electrocaloric cooling. To model caloric cooling systems, accurate and thermodynamically consistent material models are required. In this study, we use a phenomenological model based on an analytical equation for the specific heat capacity to describe the material behaviour of bulk PST material. This model is fitted to the experimental data, showing a very good agreement. Based on this model, essential material properties such as the adiabatic temperature change and isothermal entropy change of this material can be calculated.
Author(s)
Unmüßig, Sabrina  orcid-logo
Fraunhofer-Institut für Physikalische Messtechnik IPM  
Bach, David  
Fraunhofer-Institut für Physikalische Messtechnik IPM  
Nouchokgwe Kamgue, Youri Dilan
Luxembourg Institute of Science and Technology
Defay, Emmanuel
Luxembourg Institute of Science and Technology
Bartholome, Kilian  orcid-logo
Fraunhofer-Institut für Physikalische Messtechnik IPM  
Journal
Energies  
Open Access
DOI
10.3390/en16155837
Language
English
Fraunhofer-Institut für Physikalische Messtechnik IPM  
Keyword(s)
  • Electrocaloric cooling

  • Electrocaloric material

  • System simulation

  • Material model

  • First-order material

  • Fraunhofer-Leitprojekt ElKaWe

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