Self-oscillation and heat management in a LaFeSi based thermomagnetic generator
In: ISSN: 0304-8853 ; Journal of Magnetism and Magnetic Materials ; https://hal.science/hal-03348584 ; Journal of Magnetism and Magnetic Materials, 2021, 540, pp.168428. ⟨10.1016/j.jmmm.2021.168428⟩, 2021
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Zugriff:
International audience ; Harvesting and directly converting the largely untapped and omnipresent low-grade heat into electricity has huge technological potential for supplying internet of things (IoT) devices, and wireless sensors in smart buildings applications. To this end, we present a self-actuating, autonomous, thermomagnetic generator (TMG) showing state-of-the-art net power output 4.2 µW (240 µW cm−3), working over a 35.1°C temperature difference. The core of our design is made of cheap and easily available piezoelectric buzzers and of commercial LaFeSi magnetocaloric materials from Vacumschmelze. The device self oscillating cycle is studied as a dynamical system with particular attention to the interplay between mechanical and thermal dynamics.
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Self-oscillation and heat management in a LaFeSi based thermomagnetic generator
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| Autor/in / Beteiligte Person: | Ahmim, Smail ; Almanza, Morgan ; Loyau, Vincent ; Mazaleyrat, Frédéric ; Pasko, Alexandre ; Parrain, Fabien ; Lobue, Martino ; Systèmes et Applications des Technologies de l'Information et de l'Energie (SATIE) ; École normale supérieure - Rennes (ENS Rennes)-Conservatoire National des Arts et Métiers CNAM (CNAM) ; HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Ecole Normale Supérieure Paris-Saclay (ENS Paris Saclay)-Université Gustave Eiffel-CY Cergy Paris Université (CY) ; Centre de Nanosciences et de Nanotechnologies (C2N) ; Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS) ; ANR-18-CE05-0019,HiPerTherMag,Micro-dispositif performant pour la récupération de chaleur de bas niveau(2018) |
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| Zeitschrift: | ISSN: 0304-8853 ; Journal of Magnetism and Magnetic Materials ; https://hal.science/hal-03348584 ; Journal of Magnetism and Magnetic Materials, 2021, 540, pp.168428. ⟨10.1016/j.jmmm.2021.168428⟩, 2021 |
| Veröffentlichung: | HAL CCSD ; Elsevier, 2021 |
| Medientyp: | academicJournal |
| DOI: | 10.1016/j.jmmm.2021.168428 |
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