Multiparametric evaluation of a magnetic field source for thermomagnetic generator

Gimaev, Radel (avtor), Kitanovski, Andrej (avtor), Klinar, Katja (avtor)

Thermomagnetic generators (TMGs) represent a promising solid-state technology for low-grade waste heat recovery. While extensive research has addressed working materials and heat transfer optimization, systematic analysis of magnetic field source design in TMGs remains underexplored. This study presents a parametric finite element analysis of the magnetic field source in a TMG. Magnetostatic and transient simulations were performed to evaluate the effects of permanent magnet (PM) material (neodymium-iron-boron [NdFeB], Alnico, and Ferrite), its dimensions, and air gap width, on the TMG output power and specific power. It is shown that reducing PM thickness yields a substantial gain in specific power output per PM mass, while an increased air gap can be maintained without significant effects on output power. The study also investigates Alnico PM as a sustainable, rare-earth-free alternative. These findings contribute to the development of mass-optimized and cost-effective thermomagnetic energy harvesters.

• Jezik: Angleški jezik
• Ključne besede: thermomagnetic, magnetic field source, waste heat, magnetic energy conversion, heat transfer, magnetocaloric, generators
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FS - Fakulteta za strojništvo
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2026
• Št. strani: Str. 1-13, [8] str. pril.
• Številčenje: Vol. 29, iss. 9, art. 117367
• PID: 20.500.12556/RUL-186209
• UDK: 536.24:537.63
• ISSN pri članku: 2589-0042
• DOI: 10.1016/j.isci.2026.117367
• COBISS.SI-ID: 289224451
• Datum objave v RUL: 28.08.2026

Gradivo je del revije

• Naslov: iScience
• Založnik: Cell Press, Elsevier
• ISSN: 2589-0042
• COBISS.SI-ID: 24098568

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: termomagnetni, vir magnetnega polja, odpadna toplota, pretvorba magnetne energije, prenos toplote, magnetokalorični, generatorji

Projekti

• Financer: ARIS - Javna agencija za znanstvenoraziskovalno in inovacijsko dejavnost Republike Slovenije
• Številka projekta: P2-0223-2022
• Naslov: Prenos toplote in snovi