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Thermal control elements for caloric energy conversion
ID Klinar, Katja (Author), ID Kitanovski, Andrej (Author)

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Abstract
Caloric energy conversion is an emerging field of cooling, heat-pumping and power-generation technologies. The potentially high energy efficiency and use of environmentally friendly and safe solid-state working substances in the form of refrigerants has stimulated increased research activity in the past two decades. Most of today's caloric devices apply so-called active regeneration, which involves the oscillation of the working fluid through the matrix of the caloric material % the caloric regenerator. However, the unavoidable, irreversible viscous and heat-transfer losses apply limits to the caloric device's performance as well as its size. The quest for better caloric-device performance has led to the development of thermal control elements, which control the heat flux on different size and time scales. In this paper we describe the working principles of these elements: thermal switches, thermal diodes and thermal regulators. This is followed by the first up-to-date critical review of the research activities and applications of thermal control elements in all types of caloric devices. We show that thermal control elements have the potential to improve the power density of caloric devices. Finally, we propose target features for these elements with respect to future research activities in the field of caloric technologies.

Language:English
Keywords:heat transfer, thermal switch, thermal diode, thermal rectification, energy conversion, magnetocaloric, electrocaloric, elastocaloric
Work type:Article
Typology:1.02 - Review Article
Organization:FS - Faculty of Mechanical Engineering
Publication status:Published
Publication version:Author Accepted Manuscript
Year:2020
Number of pages:Str. 1-17
Numbering:Vol. , nr.
PID:20.500.12556/RUL-124218 This link opens in a new window
UDC:536(045)
ISSN on article:1364-0321
DOI:10.1016/j.rser.2019.109571 This link opens in a new window
COBISS.SI-ID:16906011 This link opens in a new window
Publication date in RUL:07.01.2021
Views:1165
Downloads:418
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Record is a part of a journal

Title:Renewable & sustainable energy reviews
Shortened title:Renew. sustain. energy rev.
Publisher:Elsevier
ISSN:1364-0321
COBISS.SI-ID:44255233 This link opens in a new window

Licences

License:CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Link:http://creativecommons.org/licenses/by-nc-nd/4.0/
Description:The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.
Licensing start date:07.01.2021

Secondary language

Language:Slovenian
Keywords:prenos toplote, toplotno stikalo, toplotna dioda, rektifikacija toplote, pretvorba energije, magnetokalorično hlajenje, elektrokalorično hlajenje, elastokalorično hlajenje

Projects

Funder:ARRS - Slovenian Research Agency
Project number:P2-0223
Name:Prenos toplote in snovi

Funder:ARRS - Slovenian Research Agency
Project number:J2-9253
Name:Multikalorično hlajenje

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