Bradesko, Andraz ; Fulanovic, Lovro ; Vrabelj, Marko ; Matavz, Aleksander ; Otonicar, Mojca ; Koruza, Jurij ; Malič, Barbara ; Rojac, Tadej (2021)
Multifunctional Cantilevers as Working Elements in Solid-State
Cooling Devices.
In: Actuators, 10 (3)
doi: 10.3390/act10030058
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Despite the challenges of practical implementation, electrocaloric (EC) cooling remains a promising technology because of its good scalability and high efficiency. Here, we investigate the feasibility of an EC cooling device that couples the EC and electromechanical (EM) responses of a highly functionally, efficient, lead magnesium niobate ceramic material. We fabricated multifunctional cantilevers from this material and characterized their electrical, EM and EC properties. Two active cantilevers were stacked in a cascade structure, forming a proof-of-concept device, which was then analyzed in detail. The cooling effect was lower than the EC effect of the material itself, mainly due to the poor solid-to-solid heat transfer. However, we show that the use of ethylene glycol in the thermal contact area can significantly reduce the contact resistance, thereby improving the heat transfer. Although this solution is most likely impractical from the design point of view, the results clearly show that in this and similar cooling devices, a non-destructive, surface-modification method, with the same effectiveness as that of ethylene glycol, will have to be developed to reduce the thermal contact resistance. We hope this study will motivate the further development of multifunctional cooling devices.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2021 |
| Autor(en): | Bradesko, Andraz ; Fulanovic, Lovro ; Vrabelj, Marko ; Matavz, Aleksander ; Otonicar, Mojca ; Koruza, Jurij ; Malič, Barbara ; Rojac, Tadej |
| Art des Eintrags: | Bibliographie |
| Titel: | Multifunctional Cantilevers as Working Elements in Solid-State Cooling Devices |
| Sprache: | Englisch |
| Publikationsjahr: | 19 März 2021 |
| Verlag: | MDPI |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Actuators |
| Jahrgang/Volume einer Zeitschrift: | 10 |
| (Heft-)Nummer: | 3 |
| DOI: | 10.3390/act10030058 |
| Kurzbeschreibung (Abstract): | Despite the challenges of practical implementation, electrocaloric (EC) cooling remains a promising technology because of its good scalability and high efficiency. Here, we investigate the feasibility of an EC cooling device that couples the EC and electromechanical (EM) responses of a highly functionally, efficient, lead magnesium niobate ceramic material. We fabricated multifunctional cantilevers from this material and characterized their electrical, EM and EC properties. Two active cantilevers were stacked in a cascade structure, forming a proof-of-concept device, which was then analyzed in detail. The cooling effect was lower than the EC effect of the material itself, mainly due to the poor solid-to-solid heat transfer. However, we show that the use of ethylene glycol in the thermal contact area can significantly reduce the contact resistance, thereby improving the heat transfer. Although this solution is most likely impractical from the design point of view, the results clearly show that in this and similar cooling devices, a non-destructive, surface-modification method, with the same effectiveness as that of ethylene glycol, will have to be developed to reduce the thermal contact resistance. We hope this study will motivate the further development of multifunctional cooling devices. |
| Freie Schlagworte: | electrocaloric response, electromechanical response, multifunctional materials, cooling |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Nichtmetallisch-Anorganische Werkstoffe |
| Hinterlegungsdatum: | 22 Mär 2021 07:38 |
| Letzte Änderung: | 22 Mär 2021 07:38 |
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