• Title/Summary/Keyword: 전도냉각형 고온초전도 자석

Search Result 2, Processing Time 0.016 seconds

Design, Fabrication and Evaluation of a Conduction Cooled HTS Magnet for SMES (SMES용 전도냉각형 고온초전도 자석의 설계, 제작 및 평가)

  • Bae, Joon-Han;Kim, Hae-Jong;Seong, Ki-Chul
    • Journal of Energy Engineering
    • /
    • v.20 no.3
    • /
    • pp.185-190
    • /
    • 2011
  • This paper describes design, fabrication, and evaluation of the conduction cooled high temperature superconducting (HTS) magnet for superconducting magnetic energy storage (SMES). The HTS magnet is composed of twenty-two of double pancake coils made of 4-ply conductors that stacked two Bi-2223 multi-filamentary tapes with the reinforced brass tape. Each double pancake coil consists of two solenoid coils with an inner diameter of 500 mm, an outer diameter of 691 mm, and a height of 10 mm. The aluminum plates of 3 mm thickness were arranged between double pancake coils for the cooling of the heat due to the power dissipation in the coil. The magnet was cooled down to 5.6 K with two stage Gifford McMahon (GM) cryocoolers. The maximum temperature at the HTS magnet in discharging mode rose as the charging current increased. 1 MJ of magnetic energy was successfully stored in the HTS magnet when the charging current reached 360A without quench. In this paper, thermal and electromagnetic behaviors on the conduction cooled HTS magnet for SMES are presented and these results will be utilized in the optimal design and the stability evaluation for conduction cooled HTS magnets.

Purification of wastewater from paper factory by cryo-cooled high-$T_c$ superconducting magnetic separator (전도냉각형 고온초전도 자석을 이용한 제지폐수의 자기분리에 의한 정수)

  • Ha, Dong-Woo;Kim, Tae-Hyung;Sohn, Myung-Hwan;Kwon, Jun-Mo;Baik, Seung-Kyu;Oh, Sang-Soo;Ko, Rock-Kil;Ha, Hong-Soo;Kim, Ho-Sup;Kim, Young-Hun;Kang, Che-Hun;Ha, Tae-Wook
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
    • /
    • 2009.05a
    • /
    • pp.4-4
    • /
    • 2009
  • Paper factories use a large amount of water and same amount of wastewater is generated. It is important to recycle the wastewater because of water shortages and water pollution. The existing water treatment facilities like precipitation process need large-scale equipment and wide space to purify the wastewater of paper factory. High gradient magnetic separation (HGMS) system has the merits to purify rapidly because of large voids at filter and to occupy small space. In this paper, two types of superconducting magnets were used for HGMS systems. Cryo-cooled Bi-2223 superconducting magnet system with 70 mm room temperature bore and 200 mm of height was prepared. Cryo-cooled Nb-Ti superconducting magnet with 100 mm room temperature bore and 600 mm of height was used for magnetic separator. Magnetic filters were designed by the analysis of magnetic field distribution at superconducting magnets. The various magnetic seeding reactions were investigated to increase the reactivity of coagulation. The effects of magnetic separation of wastewater were investigated as variation of magnetic field strength and flow rate of wastewater.

  • PDF