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Type: Artigo
Title: On the influence of thermal hysteresis on the performance of thermomagnetic motors
Author: Bessa, C. V. X.
Ferreira, L. D. R.
Horikawa, O.
Monteiro, J. C. B.
Gandra, F. G.
Gama, S.
Abstract: Although thermal hysteresis might be a problem in the magnetocaloric refrigeration, the same is not necessarily true for thermomagnetic motor applications. This work presents a comparison of the magnetocaloric properties of materials with first order magnetic transition (having large or narrow thermal hysteresis) to those with second order magnetic transition, assessing the application of these materials in thermomagnetic motors through a thermodynamic approach. Results show that the larger the thermal hysteresis, the higher the specific work produced in a thermal cycle. This allows operation at higher temperature differences with high efficiency relative to Carnot efficiency, when compared with systems using narrow hysteresis and second order transition materials.
Subject: Refrigeração magnética
Transições de fase de primeira ordem
Magnetic cooling
First-order phase transition
Country: Estados Unidos
Editor: AIP Publishing
Rights: aberto
Identifier DOI: 10.1063/1.5010356
Date Issue: 2017
Appears in Collections:IFGW - Artigos e Outros Documentos

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