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DEVELOPMENT OF A NEW COOLING DESIGN DATABASE FOR SUPERCONDUCTING MAGNETS OF FUSION EXPERIMENTAL FACILITY

Research Project

Project/Area Number 04558003
Research Category

Grant-in-Aid for Developmental Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field プラズマ理工学
Research InstitutionKYOTO UNIVERSITY

Principal Investigator

SHIOTSU Masahiro  KYOTO UNIVERSITY,INST.OF ATOMIC ENERGY,ASSOC.PROF., 原子エネルギー研究所, 助教授 (20027139)

Co-Investigator(Kenkyū-buntansha) MOTOJIMA Osamu  NATIONAL INSTITUTE FOR FUSION SCIENEC,PROFESSOR, 教授 (60109056)
YAMAMOTO Junya  NATIONAL INSTITUTE FOR FUSION SCIENEC,PROFESSOR, 教授 (00029208)
TAKEUCHI Yuto  KYOTO UNIVERSITY,INST.OF ATOMIC ENERGY.INSTRUCTOR, 原子エネルギー研究所, 助手 (90179606)
HATA Kouichi  KYOTO UNIVERSITY,INST.OF ATOMIC ENERGY.INSTRUCTOR, 原子エネルギー研究所, 助手 (60115912)
Project Period (FY) 1992 – 1994
Project Status Completed (Fiscal Year 1994)
Budget Amount *help
¥16,600,000 (Direct Cost: ¥16,600,000)
Fiscal Year 1994: ¥1,500,000 (Direct Cost: ¥1,500,000)
Fiscal Year 1993: ¥5,000,000 (Direct Cost: ¥5,000,000)
Fiscal Year 1992: ¥10,100,000 (Direct Cost: ¥10,100,000)
KeywordsSuperfluid Helium / Superconducting Magnet / Cooling Stability
Research Abstract

Steady and unsteady heat transfer characteristics on single horizontal wires with the diameters ranged over 0.08 to 1.2 mm were studied experimentally and theoretically for wide ranges of experimental conditions to develop a new two dimensional cooling design database. Major results are as follows :
1.Development of Test Cylinders Made of Special Alloy
Test cylinders made of special alloys (Au-Mn, 0.9 atomic % ; Pt-Co, 0.5 atomic %) were developed to use the iestcylinder as well as the resistance thermometer. Steady-state heat transfer and unsteady heat tranfer caused by step heat input under saturated and subcooled conditions were obtained systematically by using these cylinders with the diameters ranged over 0.08 to 1.2 mm.
2.Steady-state Heat Transfer Results
a)Critical Heat Flux (CHF)
The CHF in He II under saturated conditions are dependent on bulk liquid temperature and liquid head, H : for a fixed liquid temperature, CHF is higher for higher liquid, head, and that for a fixed liquid … More head increases with decreasing liuqid temperature from lambda point. It has a maximum at liquid tempreture of around 2 K and gradually decreases with further decreasing liquid temperature. The authors have presented the CHF correlation based on the solution for Gorter-Mellink equations. This correlation was based on the assumptions that the critical heat flux was determined by the condition that liquid in the vicintiy of the wire which was initially under a subcooled conditon due to pressure P_L(=P+rhogH) at the wire surface had reached the saturation temperature of lambda temperature. It was confirmed that this correlation predicts the CHF under wide range of conditions (pressure, liquid subcooling and cylinder diameter).
b)Film Boiling Heat Transfer
Theoretical film boiling heat transfer correlation for horizontal cylinder was presented. Not only the experimental data by the authors but also the data by other workers for different cylinder diameters are in agreement with the theoretical values.
3.Unsteady Heat Tranfer caused by Step Heat Input
It was first clarified by the authors that, when the stepwise heat input with the height higher than that corresponding to the steady-state critical heat flux is given to the test cylinder, quasi-steady state last a period of time on the extrapolation of steady-state Kapitza conductance curve and then jumps to film boiling. A general correlation which can evaluate the lifetime of the quasi-steady state for various wave for of the heat inputs was presented based on the experimental results for wide ranges of pressure, liquid subcooling and cylinder diameter. An absolute stability limit for magnet windings was given based on the correlation. Less

Report

(4 results)
  • 1994 Annual Research Report   Final Research Report Summary
  • 1993 Annual Research Report
  • 1992 Annual Research Report
  • Research Products

    (24 results)

All Other

All Publications (24 results)

  • [Publications] M. Shiotsu: "Transient Heat Tranfer for Large Stepwise Heat Inputs to a Horizontal Wire in Subcooled He II" Advances in Cryogenic Engineering. Vol.37A. 37-46 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] A. Sakurai: "Transient Heat Tranfer for Large Stepwise Heat Inputs to a Horizontal Wire in Saturated He II" Advances in Cryogenic Engineering. Vol.37A. 25-35 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] M. Shiotsu: "Film Boiling Heat Transfer from a Horizontal Wire in He II" Heat Transfer in Phase Change,ASME Publication. HTD-205. 63-68 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] M. Shiotsu: "Steady and Unsteady Heat Tranfer from a Horizontal Wire in a Pool of Subcooled He II at Pressures from Near λpressure to Atmospheric" Heat Transfer and Superconducting Magnetic Energy Storage, ASME Publication. HTD-211. 19-25 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] M. Shiotsu: "Effect of Test Heater Diameter on Critical Heat Flux in He II" Advances in Cryogenic Engineering. Vol.39. 1794-1804 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] M. Shiotsu: "Critical Heat Flux on Single Horizontal Wires in Superfluid Helium at Pressures" Heat Tranfser 1994,Institution of Chemical Engineers. Vol.5. 141-146 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] M. Shiotsu: "Estimation of Kapitza Conductance Effect on Steady and Transient Boiling Heat Transfer in He I based on Kapitza Conductance Results in He II" to appear in Cryogenics.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] M. Shiotsu: "Transient Heat Transfer from a Horizontal Wire in Subcooled He II at Atmospheric Pressure for a Wide Range of Wire Diameter" to be presented at Cryogenic Engineering Conference,Columbus, Ohio, July 17-21, 1994.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] 1)M.Shiotsu, K.Hata, and A.Sakurai: "Transient Heat Transfer for Large Stepwise Heat Inputs to a Horizontal Wire in Subcooled He II" Advances in Cryogenic Engineering. Vol.37A. 37-46 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] 2)A.Sakurai, M.Shiotsu, and K.Hata: "Transient Heat Transfer for Large Stepwisc Heat Inputs to a Horizontal Wire in Saturated He II" Advances in Cryogenic Engineering. Vol.37A. 25-35 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] 3)M.Shiotsu, K.Hata, and A.Sakurai: "Film Boiling Heat Transfer from a Horizontal Wire in He II" Heat Transfer in Phase Change ASME Publication. HTD-Vol.205. 63-68 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] 4)M.Shiotsu, K.Hata, and A.Sakurai: "Steady and Unsteady Heat Transfer from a Horizontal Wire in a Pool of Subcooled He ll at Pressures from Near lambda-pressure to Atmospheric" Heat Transfer and Superconducting Magnetic Energy Storage, ASME Publication. HTD-Vol.211. 19-25 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] 5)M.Shiotsu, K.Hata, and A.Sakurai: "Effect of Test Heater Diameter on Critical Heat Flux in He II" Advances in Cryogenic Engineering. Vol.39. 1797-1804 (1944)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] 6)M.Shiotsu, K.Hata, Y.Takeuchi, K.Hama and A.Sakurai: "Critical Heat Flux on Single Horizontal Wires in Superfluid Helium at Pressures" Heat Transfer 1994 (Proc.of the 10th Internat.Heat Transf.Conf.). Vol.5. 141-146 (1944)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] 7)M.Shiotsu, K.Hata, Y.Takeuchi, K.Hama and A.Sakurai: "Estimation of Kapitza Conductance Effeat on Steady and Transient Boiling Heat Transfer in He I based on Kapitza Conductanue Results in He II" to appear in Cryogenics.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] 8)M.Shiotsu, K.Hata, and A.Sakurai: "Transient Heat transfer from a Horizontl Wire in Subcooled He II at Atmospheric Pressure for a Wide Range of Wire Diameter" to be presented at Cryogenic Engineering Conference, Columbus, Ohio, July 17-21. (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] M.Shiotsu: "Effect of Test Heater Diameter on Critical Heat Flux in He II" Advances in Cryogenic Engineering. Vol.39. 1794-1804 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] M.Shiotsu: "Critical Heat Flux on Single Horizontal Wires in Superfluid Helium at Pressures" Heat Tranfser 1994.Institution of Chemical Engineers. Vol.5. 141-146 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] M.Shiotsu: "Estimation of Kapitza Conductance Effect on Steady and Transient Boiling Heat Transfer in He I based on Kapitza Conductance Results in He II" to appear in Cryogenics.

    • Related Report
      1994 Annual Research Report
  • [Publications] M.Shiotsu: "Transient Heat Transfer from a Horizontal Wire in Subcooled He II at Atmospheric Pressure for a Wide Range of Wire Diameter" to be presented at Cryogenic Engineering Conference,Columbus,Ohio,July 17-21,1994.

    • Related Report
      1994 Annual Research Report
  • [Publications] M.Shiotsu: "Steady and Unsteady Heat Transfer from a Horizontal Wire in a Pool of Subcooled He II at Pressures from Near λ-Pressure to Atmosheric" Heat Transfer and Superconducting Magnetic Energy Storage,ASME Publication. HTD-211. 19-25 (1992)

    • Related Report
      1993 Annual Research Report
  • [Publications] M.Shiotsu: "Effect of Test Heater Diameter on Critical Heat Flux in He II" Advances in Cryogenic Engineering. Vol.39. (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] M.Shiotsu: "Critical Heat Flux on Single Horizontal Wires in Superfluid Helium at Pressures" to be presented at the 10th International Heat Transfer Conference,Brighton,UK,August 14-18,1994. (1994)

    • Related Report
      1993 Annual Research Report
  • [Publications] M.Shiotsu: "Steaby and Unsteady Heat Transfef From a Horizontal Wire in a Pool of Subcooled He II at Pressures From Near λ-Pressure to Atmospheric" Heat Transfer and Superconducting Magnetic Energy Storage,ASME Publication. GTD-211. 19-25 (1992)

    • Related Report
      1992 Annual Research Report

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Published: 1992-04-01   Modified: 2016-04-21  

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