Scale law on energy efficiency of electrocaloric materials

Nouchokgwe Kamgue, Youri Dilan

Reference : Scale law on energy efficiency of electrocaloric materials


	Document type :	Dissertations and theses : Doctoral thesis
	Discipline(s) :	Physical, chemical, mathematical & earth Sciences : Physics
	Focus Areas :	Physics and Materials Science
	To cite this reference:	http://hdl.handle.net/10993/52452

Title :	Scale law on energy efficiency of electrocaloric materials
Language :	English
Author, co-author :	Nouchokgwe Kamgue, Youri Dilan [University of Luxembourg > Faculty of Science, Technology and Medecine (FSTM) > > ; Luxembourg Institute of Science & Technology - LIST > Materials Research and Technology > Ferroic Materials for Transducers]
Publication date :	9-Sep-2022
Institution :	University of Luxembourg, Esch-sur-Alzette, Luxembourg
Name of the degree :	DOCTEUR DE L’UNIVERSITE DU LUXEMBOURG EN PHYSIQUE
Number of pages :	178
Supervisor :	Defay, Emmanuel
President of the jury :	Redinger, Alex
Member of the jury :	Bahl, Christian
	Ursic, Hana
	Lloveras, Pol
Keywords :	[en] electrocalorics ; energy efficiency ; materials efficiency
Abstract :	[en] Caloric materials are suggested as energy-efficient refrigerants for future cooling devices. They could replace the greenhouse gases used for decades in our air conditioners, fridges, and heat pumps. Among the four types of caloric materials (electro, baro, elasto, magneto caloric), electrocaloric materials are more promising as applying large electric fields is much simpler and cheaper than the other fields. The research in the last years has been focused on looking for electrocaloric materials with high thermal responses. However, the energy efficiency crucial for future replacement of the vapor compression technology has been overlooked. The intrinsic efficiency of electrocaloric has been barely studied. In the present dissertation, we will study the efficiency of EC materials defined as materials efficiency. It is the ratio of the reversible electrocaloric heat to the reversible electrical work required to drive this heat. In this work, we will study the materials efficiency of the benchmark lead scandium tantalate in different shapes (bulk ceramic and multilayer capacitors). A comparison to other caloric materials is presented in this dissertation. Our work gives more insights on the figure merit of materials efficiency to further improve the efficiency of our devices.
Research centres :	Luxembourg Institute of Science & Technology - LIST
Funders :	Fonds National de la Recherche - FnR
Name of the research project :	CAMELHEAT C17/MS/11703691/Defay
Target :	Researchers ; Professionals ; Students ; General public ; Others
Permalink :	http://hdl.handle.net/10993/52452
FnR project :	FnR ; FNR11703691 > Emmanuel Defay > CAMELHEAT > Caloric Materials: Electrical Efficiency And Heat Conductivity > 01/09/2018 > 31/08/2021 > 2017

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