Passive force balancing of an active magnetic regenerative liquefier

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:451

Article

Teyber, R.^1,2  Meinhardt, K.²  Thomsen, E.²  Polikarpov, E.²  Cui, J.^3,4  Rowe, A.¹  Holladay, J.²  Barclay, J.⁵ 

[1] Univ Victoria, Inst Integrated Energy Syst IESVIC, Victoria, BC V8W 2Y2, Canada

[2] PNNL, Richland, WA 99354 USA

[3] Ames Natl Lab, Ames, IA 50010 USA

[4] Iowa State Univ AMES, Ames, IA 50010 USA

[5] Emerald Energy NW LLC EENW, Bothell, WA 98021 USA

关键词: Active magnetic regenerator;    Gadolinium;    Liquefaction;    Superconducting;    Genetic algorithm;   

DOI  :  10.1016/j.jmmm.2017.11.002

来源: Elsevier

【 摘 要 】

Active magnetic regenerators (AMR) have the potential for high efficiency cryogen liquefaction. One active magnetic regenerative liquefier (AMRL) configuration consists of dual magnetocaloric regenerators that reciprocate in a persistent-mode superconducting solenoid. Issues with this configuration are the spatial and temporal magnetization gradients that induce large magnetic forces and winding currents. To solve the coupled problem, we present a force minimization approach using passive magnetic material to balance a dual-regenerator AMR. A magnetostatic model is developed and simulated force waveforms are compared with experimental measurements. A genetic algorithm identifies force-minimizing passive structures with virtually ideal balancing characteristics. Implementation details are investigated which affirm the potential of the proposed methodology. Published by Elsevier B.V.

【 授权许可】

Free