A Liquid Metal Alternate MHD Disk Generator

Antoine Alemany (), Arturs Brekis and Augusto Montisci
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Antoine Alemany: Centre National de la Recherché Scientifique (CNRS), Institute of Engineering Univ. Grenoble Alpes (Grenoble INP), Laboratoire de Science et Ingénierie des Matériaux et Procédés (SIMAP), University Grenoble Alpes (UGA), 1130, Rue de la Piscine, Domaine Universitaire, BP75, 38402 Saint-Martin, France
Arturs Brekis: Institute of Physics, University of Latvia, Miera iela 32, LV-2169 Salaspils, Latvia
Augusto Montisci: Electrical and Electronic, English Department, University of Cagliari, Via Marengo 2, 09123 Cagliari, Italy

Sustainability, 2023, vol. 15, issue 16, 1-18

Abstract: In this paper, an electrical generator is presented for the exploitation of alternating energy. Some renewable sources are directly available in such forms, such as the wave power obtainable from the sea, but most of them can be converted to alternative forms; therefore, the proposed generator can be applied to different kinds of renewable sources. In particular, the proposed system is thought to be coupled with a thermoacoustic engine, which converts heat into mechanical vibration without using solid moving parts. This opens the proposed system to the use of most thermal sources, such as solar radiation, waste recovery, geothermic, car exhaust, and others. The object of of this present work concerns the transformation of alternating mechanical energy into electricity by using a specific type of magnetohydrodynamic (MHD) disk generator. The functioning of this generator is based on the interaction between a DC magnetic field embedded in a disk structure and a conducting fluid held in an inner channel. A simplified model of the generator is presented here, and a sensitivity analysis is performed. It is shown that, under specific operating conditions, the efficiency of the system can reach 70% with a level of power of hundreds of watts.

Keywords: magnetohydrodynamic disk generator; vibration power; liquid metals; permanent magnets (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
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