Phenomenological Material Model for First-Order Electrocaloric Material

Sabrina Unmüßig, David Bach, Youri Nouchokgwe, Emmanuel Defay and Kilian Bartholomé ()
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Sabrina Unmüßig: Fraunhofer Institut für Physikalische Messtechnik IPM, Georges-Köhler-Allee 301, 79110 Freiburg, Germany
David Bach: Fraunhofer Institut für Physikalische Messtechnik IPM, Georges-Köhler-Allee 301, 79110 Freiburg, Germany
Youri Nouchokgwe: Materials Research and Technology Department, Luxembourg Institute of Science and Technology, 41 Rue du Brill, L-4422 Belvaux, Luxembourg
Emmanuel Defay: Materials Research and Technology Department, Luxembourg Institute of Science and Technology, 41 Rue du Brill, L-4422 Belvaux, Luxembourg
Kilian Bartholomé: Fraunhofer Institut für Physikalische Messtechnik IPM, Georges-Köhler-Allee 301, 79110 Freiburg, Germany

Energies, 2023, vol. 16, issue 15, 1-6

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.

Keywords: electrocaloric cooling; electrocaloric material; system simulation; material model; first-order material (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
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