Korean Journal of Air-Conditioning and Refrigeration Engineering (설비공학논문집)

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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A Study of Optimum Insulation Conditions of a HTS Power Cable Cryostat

고온초전도 전력케이블 저온용기의 최적단열설계에 관한 연구

  • Koh, Deuk-Yong (Graduate School, Department of Mechanical Engineering, Hanyang University) ;
  • Lee, Kwan-Soo (Department of Mechanical Engineering, Hanyang University)
  • Published : 2007.04.10
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Abstract

The object of this study is to find the optimal insulation design conditions of a HTS power cable cryostat. The optimum condition of a cable cryostat is obtained by varying types of MLIs, cable core weights, spacer diameters, winding pitches and MLI layer numbers. As the weight of cable core is increased, conduction heat transfer from surroundings to cable cryostat is increased. But as the spacer pitch is increased from 120 mm to 200 mm, the heat leak of cable cryostat remains almost constant. The optimal number of MLI layers is suggested. Double ply MLI is more effective than triple ply MLI and the insulation effect is best when the number of MLI layers is 36.

Keywords

References

  1. Klaus, D. T. and Thomas, M. F., 1989, Cryogenic process engineering, Plenum Press., pp.381-382
  2. Ogihara, 1999, Introduction to cryogenic engineering, Tokyo Denki University Press, pp. 263-265
  3. Ohmori, T., 2006, Thermal performance of multilayer insulation around a horizontal cylinder, Cryogenics, Vol. 45, pp.725-732 https://doi.org/10.1016/j.cryogenics.2005.06.009
  4. Paulo, A., Augusto, T. C., Pedro, A. and Domingos, B., 2006, Optimization of refrigerated shields using multilayer thermal insulation: Cryostats design - analytical solution, Cryogenics, Vol. 46, pp.449-457 https://doi.org/10.1016/j.cryogenics.2006.02.002
  5. Neumann, H., 2004, Concept for thermal insulation arrangement within a flexible cryostat for HTS power cables, Cryogenics, Vol. 44, pp.93-99 https://doi.org/10.1016/j.cryogenics.2003.08.005
  6. Fesmire, J. E., Augustynowicz, S. D. and Demko, J. A., 2002, Overall thermal performance of flexible piping under simulated bending conditions, Advances in Cryogenic Engineering, Vol. 47, pp. 1533-1540
  7. Fesmire, J. E., Augustynowicz, S. D. and Demko, J. A., 2002, Thermal insulation performance of flexible piping for use in HTS power cables, Advances in Cryogenic Engineering, Vol. 47, pp.1525-1532
  8. Hedayat, A., Hastings, L. J. and Brown, T., 2002, Analytical modeling of variable density multilayer insulation for cryogenic storage, Advances in Cryogenic Engineering, Vol. 47, pp. 1557-1564
  9. Furukawa Electric Co. Ltd., 2003, Study of Cooling Improvement of a Long Length Insulation Pipe, pp.13-14