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Toward a solid-state thermal diode for room-temperature magnetocaloric energy conversion
ID
Klinar, Katja
(
Author
),
ID
Muñoz Rojo, Miguel
(
Author
),
ID
Kutnjak, Zdravko
(
Author
),
ID
Kitanovski, Andrej
(
Author
)
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Abstract
Thermal control elements, i.e., thermal diodes, switches, and regulators, can control the heat flow in an analogous way in how electronic devices control electrical currents. In particular, a thermal diode allows a larger heat flux in one direction than in the other. This has aroused the interest of researchers working on the thermal management of electronics, refrigeration, and energy conversion. Solid-state thermal diodes are attractive because they are silent, reliable, lightweight, and durable. While some solid-state thermal diodes have been developed at the nano- and microscale, the leap to the macroscale has yet to be made. A macroscale thermal diode would play a crucial role in the future development of applications related to caloric refrigeration and heat pumping. Additionally, the temperature changes of caloric materials (due to the caloric effect) are ideal for testing these thermal devices. This paper aims to numerically evaluate the influence of a macroscopic solid-state thermal diode in a magnetocaloric refrigeration device under transient and quasi-steady-state conditions. Materials with different temperature-dependent properties were analyzed, and the most promising ones were selected for the operating range of a magnetocaloric device (290–296 K). The highest achieved magnetocaloric thermal rectification ratio under transient conditions was up to 295-times higher than with quasi-steady-state operation. This shows that transient operation should be considered for future progress with this technology.
Language:
English
Keywords:
rektifikacija toplote
,
toplotna dioda
,
toplotni rektifikator
,
toplotni kontrolni element
,
prenos toplote
,
magnetokaloričen
,
hlajenje
,
pretvorba energije
Work type:
Article
Typology:
1.01 - Original Scientific Article
Organization:
FS - Faculty of Mechanical Engineering
Publication status:
Published
Publication version:
Author Accepted Manuscript
Year:
2020
Number of pages:
Str. 234101-1-234101-10
Numbering:
Vol. 127, no. 23
PID:
20.500.12556/RUL-124217
UDC:
53
ISSN on article:
0021-8979
DOI:
10.1063/5.0006120
COBISS.SI-ID:
19703299
Publication date in RUL:
07.01.2021
Views:
2241
Downloads:
465
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Record is a part of a journal
Title:
Journal of applied physics
Shortened title:
J. appl. phys.
Publisher:
American Institute of Physics.
ISSN:
0021-8979
COBISS.SI-ID:
4730378
Licences
License:
CC BY 4.0, Creative Commons Attribution 4.0 International
Link:
http://creativecommons.org/licenses/by/4.0/
Description:
This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
Licensing start date:
07.01.2021
Secondary language
Language:
English
Keywords:
thermal rectification
,
thermal diode
,
thermal rectifier
,
thermal control element
,
heat transfer
,
magnetocaloric
,
energy conversion
,
refrigeration
Projects
Funder:
ARRS - Slovenian Research Agency
Project number:
J2-1738
Name:
Elektrokalorični elementi za aktivno hlajenje elektronskih vezij
Funder:
ARRS - Slovenian Research Agency
Project number:
J2-9253
Name:
Multikalorično hlajenje
Funder:
ARRS - Slovenian Research Agency
Project number:
P2-0223
Name:
Prenos toplote in snovi
Funder:
EC - European Commission
Funding programme:
H2020
Project number:
778072
Name:
Engineering of Nanostructures with Giant Magneto-Piezoelectric and Multicaloric Functionalities
Acronym:
ENGIMA
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