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

Dzekan D, Kischnik TD, Diestel A, Nielsch K, Fahler S (2022)

Publication Type: Journal article

Publication year: 2022

Journal

JPhys Energy Institute of Physics (IOP)

Book Volume: 4

Article Number: 024006

Journal Issue: 2

DOI: 10.1088/2515-7655/ac5bdb

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.

Involved external institutions

Leibniz-Institut für Festkörper- und Werkstoffforschung Dresden e.V. (IFW) / Leibniz Institute for Solid State and Materials Research Dresden DE Germany (DE)

How to cite

APA:

Dzekan, D., Kischnik, T.D., Diestel, A., Nielsch, K., & Fahler, S. (2022). Origin and avoidance of double peaks in the induced voltage of a thermomagnetic generator for harvesting low-grade waste heat. JPhys Energy, 4(2). https://doi.org/10.1088/2515-7655/ac5bdb

MLA:

Dzekan, Daniel, et al. "Origin and avoidance of double peaks in the induced voltage of a thermomagnetic generator for harvesting low-grade waste heat." JPhys Energy 4.2 (2022).

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