化工学报 ›› 2021, Vol. 72 ›› Issue (S1): 302-309.DOI: 10.11949/0438-1157.20201582

• 流体力学与传递现象 • 上一篇    下一篇

多层主动磁回热器的仿真优化

海鹏1,2(),李振兴1,李珂1(),黄红梅1,郑文帅1,高新强1,戴巍1,沈俊1()   

  1. 1.中国科学院理化技术研究所低温工程学重点实验室,北京 100190
    2.西安交通大学能源与动力工程学院,陕西 西安 710049
  • 收稿日期:2020-11-03 修回日期:2021-01-23 出版日期:2021-06-20 发布日期:2021-06-20
  • 通讯作者: 李珂,沈俊
  • 作者简介:海鹏(1992—),男,硕士,haipeng205@163.com
  • 基金资助:
    国家重点研发计划项目(2017YFB0702704);国家自然科学基金面上基金项目(51925605)

Simulation and optimization of multilayer active magnetic regenerator

HAI Peng1,2(),LI Zhenxing1,LI Ke1(),HUANG Hongmei1,ZHENG Wenshuai1,GAO Xinqiang1,DAI Wei1,SHEN Jun1()   

  1. 1.Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
    2.School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an 710049, Shaanxi, China
  • Received:2020-11-03 Revised:2021-01-23 Online:2021-06-20 Published:2021-06-20
  • Contact: LI Ke,SHEN Jun

摘要:

借助Comsol多物理场仿真软件构建了一维瞬态磁制冷模型,考察了在特定工况下由3种不同居里温度的磁热工质(a、b、c)所构成的单层、双层和三层回热器,研究了不同填充比例与高温端温度对主动磁回热器的性能影响。仿真结果表明,当主动磁回热器均匀填充时,三层回热器性能好于单层和双层;当双层回热器非均匀比例填充时,发现在填充比为3∶7时性能最佳。相对于5∶5填充的双层回热器,3∶7比例填充的回热器冷量提高了6.02%,对应的COP提高了3.5%;同时对比三层回热器(即算例c),最大冷量提高了1.13%。在考察不同高温端温度对3种回热器的性能影响时,不同高温端温度下不同的填充方式选择对回热器的性能影响较大。

关键词: 室温磁制冷, 温室气体, 数值模拟, 热力学, 多层回热器

Abstract:

In this paper, a one-dimensional transient model is constructed by using COMSOL multiphysics to investigate the single-layer, double-layer and three-layer regenerator composed of three kinds of magnetocaloric materials (a, b, c) with different Curie temperatures. The effects of different filling ratios and high temperature end temperature on the performance of active magnetic regenerators are studied. The simulation results show that when the active magnetic regenerator is uniformly filled, the performance of the three-layer regenerator is better than that of the single-layer and double-layer regenerator. When the double-layer regenerator is filled with non-uniform proportion, the performance is the best when the filling ratio is 3∶7. Compared with the double-layer regenerator filled with 5∶5, the cooling capacity of the regenerator filled with 3∶7 ratio is increased by 6.02% and the corresponding COP is increased by 3.5%. Meanwhile, the maximum cooling capacity is increased by 1.13% compared with the three-layer AMR (i.e. example c). In order to investigate the influence of different hot end temperature on the performance of the three regenerators, the different filling methods at different hot end temperatures have a great influence on the performance of AMR.

Key words: room temperature magnetic refrigeration, greenhouse gases, numerical simulation, thermodynamics, multilayer AMR

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