Work

Origin and avoidance of double peaks in the induced voltage of a thermomagnetic generator for harvesting low-grade waste heat

Year: 2022

Type: article

Abstract: Thermomagnetic harvesting is an emerging approach used to convert low-grade waste heat to electricity, which recently obtained a boost due to the development of both more efficient functional materials and innovative device concepts. Here, we examine a thermomagnetic generator which utilizes gadolinium as the thermomagnetic material and report on the double peaks of the induced voltage. Using a combination of experiments and theory we show that these double peaks originate from the interaction between an asymmetric magnetization curve and a pretzel-like magnetic field topology. Double peaks are detrimental for the output power and can be avoided by matching the magnetization change by adjusting the cold and hot fluid flow.

Source: Journal of Physics Energy

DOI: 10.1088/2515-7655/ac5bdb

Authors: Daniel Dzekan, Tim D Kischnik, Anett Diestel, Kornelius Nielsch, Sebastian Fähler

Institutions: Leibniz Institute for Solid State and Materials Research, Technische Universität Dresden, Helmholtz-Zentrum Dresden-Rossendorf

Language: English

Topic: Advanced Thermoelectric Materials and Devices

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: gold

Estimated APC paid: $2,405