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ENCIT 2020
18th Brazilian Congress of Thermal Sciences and Engineering
Thermodynamic Analysis of Thermomagnetic Motors
Submission Author:
Luiz Avelar , MG
Co-Authors:
Luiz Avelar, Matheus Urquiza Lima Santos, Lorenzo Dos Santos Corrêa
Presenter: Lorenzo Dos Santos Corrêa
doi://10.26678/ABCM.ENCIT2020.CIT20-0047
Abstract
Thermomagnetic motors are based on the effect of heat on the magnetic properties of magnetic materials. They are interesting if the heat source is a low-grade waste heat, in cogeneration systems, even though they present low Carnot Efficiency when operating in temperature ranges from 25ºC (heat sink) up to 200ºC (heat source). The present work proposes the evaluation and comparison of the Ericsson and Brayton cycles applied to thermomagnetic motors. Gadolinium is considered as the magnetic material and its temperature-entropy diagram, as well magnetization data, were obtained from WDS theory. The analyses are based on the specific work, and the first law and second laws of thermodynamics efficiencies.
Keywords
Thermomagnetic motors, magnetic material, thermodynamic cycles, Ericsson Cycle, Brayton Cycle
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