Performance characteristics of an irreversible regenerative magnetic Brayton refrigeration cycle using Gd0.74Tb0.26 as the working substance

被引：9
作者：
Diguet, Gildas [1 ]
Lin, Guoxing [1 ]
Chen, Jincan [1 ]
机构：
[1] Xiamen Univ, Dept Phys, Xiamen 361005, Peoples R China
来源：
CRYOGENICS | 2012年 / 52卷 / 10期
关键词：
Magnetic refrigeration; Magnetocaloric material for room-temperature application; Thermodynamic performance; Regeneration; Irreversibility;
D O I：
10.1016/j.cryogenics.2012.05.020
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
The cycle model of an irreversible regenerative magnetic Brayton refrigerator using Gd0.74Tb0.26 as the working substance is established. Based on the experimental characteristics of iso-field heat capacities of the material Gd0.74Tb0.26 at 0 T and 2 T, the corresponding iso-field entropies are calculated and the thermodynamic performance of an irreversible regenerative magnetic Brayton refrigeration cycle is investigated. The effects of the irreversibilities in the two adiabatic processes and non-perfect regenerative process of the magnetic Brayton refrigeration cycle on the cooling quantity, the heat quantity released to the hot reservoir, the net cooling quantity and the coefficient of performance are discussed in detail. Some significant results are obtained. (c) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码：500 / 504
页数：5
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