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Document IIF

A miniature scale multi-unit generator for low-grade waste heat recovery.

Numéro : 0004

Auteurs : WISCHNEWSKI M., OHTSUKA M., MIKI H., KOHL M.

Résumé

Thermomagnetic materials like Ni-Mn-Ga exhibit a large, abrupt magnetization change near their Curie temperature allowing for waste-heat driven modulation of magnetic forces. Using this effect, we developed a miniature-scale thermomagnetic (TM) generator that converts low-temperature waste heat at temperatures below 180 °C to electricity via resonant self-actuation of an elastic cantilever. Recently, we extended this concept using a piezoelectric (P) layer along the cantilever to increase the output voltage, facilitating power rectification. Here we present the upscaling of the single-unit P-TM generators for the case of five units operating in parallel. Each unit of the P-TM generator system, comprising a rectification circuit, is capable of generating 4 V DC at a source temperature of 160 °C. The accumulated power output of all five units reaches 1.6 µW demonstrating the successful upscaling of P-TM generators operating in resonant self-actuation mode.
 

Documents disponibles

Format PDF

Pages : 8 p.

Disponible

  • Prix public

    20 €

  • Prix membre*

    15 €

* meilleur tarif applicable selon le type d'adhésion (voir le détail des avantages des adhésions individuelles et collectives)

Détails

  • Titre original : A miniature scale multi-unit generator for low-grade waste heat recovery.
  • Identifiant de la fiche : 30035046
  • Langues : Anglais
  • Sujet : Technologie
  • Source : 11th IIR Conference on Solid-State Cooling, Heating and Energy Harvesting.
  • Date d'édition : 07/06/2026
  • DOI : http://dx.doi.org/10.18462/iir.thermag.2026.0004

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