Progress in Superconductivity and Cryogenics (한국초전도ㆍ저온공학회논문지)

The Korean Society of Superconductivity and Cryogenics (한국초전도저온학회)
권호 표지
DOI QR코드

DOI QR Code

AC loss of HTS magnet for AMR refrigerator using magnetic field formulation and edge element in cylindrical coordinates

  • Received : 2013.02.18
  • Accepted : 2013.03.16
  • Published : 2013.03.31
Download PDF
⟨ Previous Next ⟩

Abstract

AMR (Active Magnetic Regenerative) refrigerators require the large variation of the magnetic field and a HTS magnet can be used. The amount of AC loss is very important considering the overall efficiency of the AMR refrigerator. However, it is very hard to estimate the precise loss of the HTS magnet because the magnetic field distribution around the conductor itself depends on the coil configuration and the neighboring HTS wires interact each other through the distorted magnetic field by the screening current Therefore, the AC loss of HTS magnet should be calculated using the whole configuration of the HTS magnet with superconducting characteristic. This paper describes the AC loss of the HTS magnet by an appropriate FEM approach, which uses the non-linear characteristic of HTS conductor. The analysis model is based on the 2-D FEM model, called as 'magnetic field formulation and edge-element model', for whole coil configuration in cylindrical coordinates. The effects of transport current and stacked conductors on the AC loss are investigated considering the field-dependent critical current. The PDE model of 'Comsol multiphysics' is used for the FEM analysis with properly implemented equations for axisymmetric model.

Keywords

References

  1. W. Iwasaki, "Magnetic refrigeration technology for an international clean energy network using hydrogen energy (WE-NET)", Int. J. Hydrogen Energy, vol. 28, pp. 559-567, 2003. https://doi.org/10.1016/S0360-3199(02)00076-9
  2. K. Kamiya, H. Takahashi, T. Numazawa,H. Nozawa, T. Yanagitani, "Hydrogen Liquefaction by Magnetic Refrigeration",Cryocooler, vol. 14, pp. 637-644, 2007
  3. J. Park, Y. Kim, S. Jeong, S. Kim, "Design of adiabatic demagnetization refrigerator for hydroge re-liquefaction", Superconductivity and cryogenics, vol. 14, no. 3., pp. 53-59, 2012 https://doi.org/10.9714/sac.2012.14.3.053
  4. A. Kitannovski, P. W. Egolf, "Thermodynamics of magnetic refrigeration", Int. J. Refrigeration, vol. 29, pp. 3-21, 2006. https://doi.org/10.1016/j.ijrefrig.2005.04.007
  5. 이지광, 임형우 박명진, 차귀수, "BSCCO tape 선재와 YBCO CC의 외부자장 각도에 따른 자화손실 특성비교," 전기학회 논문지, 전기기기 및 에너지변환부문, vol. 54, no. 12, pp. 586-591, 2005
  6. 이지광, 임형우, 차귀수, "대전류 통전을 위한 YVCO CC 적층선재의 자화손실 특성," 한국초전도 저온공학회 논문지, vol. 9, no. 1, pp. 27-31, 2007
  7. 박명진, 임형우, 이광연, "적층 배열형상에 따른 BSCCO 적층 선재의 자화손실 특성 수치해석 및 측정," 전기학회논문지 전기기기 및 에너지변환시스템부문, vol. 55, no. 2, pp. 83-88, 2006
  8. N. Amemiya and M. Nakahata, "Numerical study on AC loss characteristics of superconducting power transmission cables comprising coated conductors with magnetic substrates," Physica C, vol. 463-465, pp. 775-780, 2007. https://doi.org/10.1016/j.physc.2007.04.265
  9. R. Brambilla, F. Grilli and L. Martini, "Development of an edge-element model for AC loss computation of high-temperature superconductors," Supercond. Sci. Technol., vol. 20, pp. 16-24, 2007. https://doi.org/10.1088/0953-2048/20/1/004
  10. S. Kim, K. Sim. J. Cho, H. Jang and M. Park, " AC loss analysis of HTS power cable with RABitS coated conductors," IEEE Trans. Appl. Supercon., vol. 20, no. 3, pp. 2130-2133, 2010 . https://doi.org/10.1109/TASC.2010.2041439
  11. E. H. Brant, M. Indenbom, "Type-II-superconductor strip with current in a perpendicular magnetic field", Phys. Rev. B, vol. 48, pp. 12893-12906, 1993. https://doi.org/10.1103/PhysRevB.48.12893

Cited by

  1. Investigation on the inductive and resistive fault current limiting HTS power cable vol.16, pp.2, 2014, https://doi.org/10.9714/psac.2014.16.2.059