Thermodynamic Performance Characteristics of a Regenerative Brayton Refrigeration Cycle Using Gd0.45Tb0.55 and Gd as the Working Substance

Shan He Su; Zhi Chao Xu; Guo Xing Lin; Gildas Diguet; Jin Can Chen

doi:10.4028/www.scientific.net/AMR.750-752.1016

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Thermodynamic Performance Characteristics of a Regenerative Brayton Refrigeration Cycle Using Gd_0.45Tb_0.55 and Gd as the Working Substance

Abstract:

Based on experimental characteristics of the iso-field heat capacity of the working substances Gd_0.45Tb_0.55 and Gd, the magnetic entropy change with temperature is calculated. The regenerative Brayton refrigeration cycles employing these materials as the working substances are established. By means of thermodynamic analysis and numerical calculation, the effects of the non-perfect regeneration on the performance characteristics of the refrigeration cycles are revealed. Furthermore, the cyclic performances employing Gd_0.45Tb_0.55 and Gd as the working substances are evaluated and compared. The results obtained may provide some useful information for the optimal design of the room temperature magnetic refrigerators.

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Advanced Materials Research (Volumes 750-752)

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1016-1019

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https://doi.org/10.4028/www.scientific.net/AMR.750-752.1016

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Online since:

August 2013

Authors:

Shan He Su, Zhi Chao Xu, Guo Xing Lin*, Gildas Diguet, Jin Can Chen

Keywords:

Brayton Cycle, Magnetic Material, Refrigeration, Regenerative Heat

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