Scientific Results

Multifunctional Magnetic Nanocolloids for Hybrid Solar-Thermoelectric Energy Harvesting

Year: 2021

Authors: Sani E., Martina M.R., Salez T.J., Nakamae S., Dubois E., Peyre V.

Autors Affiliation: 1 CNR-INO National Institute of Optics, Largo E. Fermi, 6, I-50125 Firenze, Italy 2 Service de Physique de l’Etat Condensé, SPEC, CEA, CNRS, Université Paris-Saclay, CEA Saclay, F-91191 Gif-sur-Yvette, France 3 École des Ponts ParisTech, 6 et 8 Avenue Blaise Pascal, Champs-sur-Marne, F-77455 Marne-la-Vallée, France 4 Laboratoire Physicochimie des Electrolytes et Nanosystèmes Interfaciaux (PHENIX), CNRS, Sorbonne Université, 4 Place Jussieu, F-75005 Paris, France

Abstract: Present environmental issues force the research to explore radically new concepts in sustainable and renewable energy production. In the present work, a functional fluid consisting of a stable colloidal suspension of maghemite magnetic nanoparticles in water was characterized from the points of view of thermoelectrical and optical properties, to evaluate its potential for direct electricity generation from thermoelectric effect enabled by the absorption of sunlight. These nanoparticles were found to be an excellent solar radiation absorber and simultaneously a thermoelectric power-output enhancer with only a very small volume fraction when the fluid was heated from the top. These findings demonstrate the investigated nanofluid’s high promise as a heat transfer fluid for co-generating heat and power in brand new hybrid flat-plate solar thermal collectors where top-heating geometry is imposed.

Journal/Review: NANOMATERIALS

Volume: 11      Pages from: 1031-1  to: 1031-18

KeyWords: Seebeck effect, direct absorption solar collectors, nanofluids, concentrating solar power, maghemite, thermoelectricity
DOI: 10.3390/nano11041031

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