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Liquid-state pyroelectric energy harvesting

Part of: Solar Energy and the Circular Economy

Published online by Cambridge University Press:  19 November 2020

M. Bevione ,
E. Garofalo ,
L. Cecchini  and
A. Chiolerio Open the ORCID record for A. Chiolerio [Opens in a new window]
M. Bevione
Affiliation:
Istituto Italiano di Tecnologia, Center for Sustainable Future Technologies, Via Livorno 60, Torino10144, Italy
E. Garofalo
Affiliation:
Istituto Italiano di Tecnologia, Center for Sustainable Future Technologies, Via Livorno 60, Torino10144, Italy Department of Electronics, Politecnico di Torino, Corso Duca degli Abruzzi 24, Torino10129, Italy
L. Cecchini
Affiliation:
Istituto Italiano di Tecnologia, Center for Sustainable Future Technologies, Via Livorno 60, Torino10144, Italy Department of Electronics, Politecnico di Torino, Corso Duca degli Abruzzi 24, Torino10129, Italy
A. Chiolerio*
Affiliation:
Istituto Italiano di Tecnologia, Center for Sustainable Future Technologies, Via Livorno 60, Torino10144, Italy
*
Address all correspondence to A. Chiolerio at [email protected]
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Abstract

A liquid-state pyroelectric energy harvester is described and a remarkable capacity to convert a thermal gradient into electrical energy is demonstrated.

Increasing the sustainability of energy generation can be pursued by harvesting extremely low enthalpy sources: low temperature differences between cold and hot reservoirs are easily achieved in every industrial process, both at large and small scales, in plants as well as in small appliances, vehicles, natural environments, and human bodies. This paper presents the assessment and efficiency estimate of a liquid-state pyroelectric energy harvester, based on a colloid containing barium titanate nanoparticles and ferrofluid as a stabilizer. The liquid is set in motion by an external pump to control velocity, in a range similar to the one achieved by Rayleigh–Bénard convection, and the colloid reservoir is heated. The colloid is injected into a Fluorinated Ethylene Propylene pipe where titanium electrodes are placed to collect electrical charges generated by pyroelectricity on the surface of the nanoparticles, reaching 22.4% of the ideal Carnot efficiency of a thermal machine working on the same temperature drop. The maximum extracted electrical power per unit of volume is above 7 mW/m3 with a ΔT between electrodes of 3.9 K.

Keywords

colloidefficiencyferroelectricfluidinorganicliquidpiezoelectricrenewablesustainabilitytribology
Type
Original Research
Information
MRS Energy & Sustainability , Volume 7 , 2020 , E38
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Copyright
Copyright © The Author(s), 2020, published on behalf of Materials Research Society by Cambridge University Press

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