Finite Element Analysis of Magnetic Field Effect on Cryocooler Regenerators
Rajendra Kumar
School of Mechanical Engineering Lovely Professional University Phagwara, Punjab, India
Sumit Shoor
School of Mechanical Engineering Lovely Professional University Phagwara, Punjab, India
14-28
Vol: 6, Issue: 4, 2016
Receiving Date:
2016-07-09
Acceptance Date:
2016-09-30
Publication Date:
2016-10-11
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Abstract
Regenerative type of cryocoolers employ magnetic intermetallic compounds of 3d transition and 4f heavy rare earth elements in the regenerators to work well below 10 K. Cryocoolers are used extensively in MRI and SQUIDS to achieve temperatures of ~4 K. Therefore they are always inevitably exposed to high magnetic fields ~5 T-7 T and their performance is degraded. Except for magnetic noises, induction losses are also present in regenerators. This paper discusses the Joule heat generation in regenerators of cryocoolers under magnetic fields of 1 T, 3 T and 4.3 T. Commercial code of FEA package, ANSYS-APDL 14.5 is used to evaluate the heat generated at above stated magnetic fields. The values obtained from FEA for heat generation is highest at 4.3 T
Keywords:
Cryocoolers; Finite Element Analysis (FEA); Joule heating; ANSYS; Magnetic field distribution
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