Phenomenological Material Model for First-Order Electrocaloric Material

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...

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Bibliographic Details
Published inEnergies (Basel) Vol. 16; no. 15; p. 5837
Main Authors Unmüßig, Sabrina, Bach, David, Nouchokgwe, Youri, Defay, Emmanuel, Bartholomé, Kilian
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.08.2023
Subjects
Analysis
Bach, David
Efficiency
Electric fields
electrocaloric cooling
electrocaloric material
Entropy
first-order material
Heat treating
material model
Phase transitions
system simulation
Temperature
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Summary: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.
ISSN:1996-1073
1996-1073
DOI:10.3390/en16155837