Effect of packing structure on anisotropic effective thermal conductivity of thin ceramic pebble bed

Shuang Wang; Shuai Wang; Bowen Wu; Yuelin Lu; Kefan Zhang; Hongli Chen

doi:https://doi.org/10.1016/j.net.2021.01.013

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자료유형: 학술저널

저자정보: Shuang Wang (School of Mechanical Engineering, Anhui Polytechnic University) Shuai Wang (University of Science and Technology of China, Hefei) Bowen Wu (School of Mechanical Engineering, Anhui Polytechnic University) Yuelin Lu (School of Mechanical Engineering, Anhui Polytechnic University) Kefan Zhang (University of Science and Technology of China) Hongli Chen (University of Science and Technology of China)

저널정보: 한국원자력학회 Nuclear Engineering and Technology Nuclear Engineering and Technology 제53권 제7호

발행연도: 2021.7

수록면: 2,174 - 2,183 (10page)

DOI: https://doi.org/10.1016/j.net.2021.01.013

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Helium cooled solid breeder blanket as an important blanket candidate of the Tokamak fusion reactoruses ceramic pebble bed for tritium breeding. Considering the poor effective thermal conductivity of theceramic breeder pebble bed, thin structure of tritium breeder pebble bed is usually adopted in theblanket design. The container wall has a great influence on the thin pebble bed packing structure,especially for the assembly of mono-sized particles, and thin pebble bed will appear anisotropic effectivethermal conductivity phenomenon. In this paper, thin ceramic pebble beds composed of 1 mm diameterLi4SiO4 particles are generated by the EDEM 2.7. The effective thermal conductivity of different thicknesspebble beds in the three-dimensional directions are analyzed by three-dimensional thermal networkmethod. It is observed that thin Li4SiO4 pebble bed showing anisotropic effective thermal conductivityunder the practical design size. Normally, the effective thermal conductivity along the bed vertical directionis higher than the horizontal direction due to the gravity effect. As the thickness increases from10 mm to 40 mm, the effective thermal conductivity of the pebble bed gradually increases

#Effective thermal conductivity #Anisotropy #Pebble bed #Discrete element method #Three-dimensional thermal network method

참고문헌 (37)

참고문헌 신청

L. A, Artsimovich / 1972 / Tokamak devices / Nucl. Fusion 12(2):215

Y. Wan / 2017 / Overview of the present progress and activities on the CFETR / Nucl. Fusion 57(10):102009

H. Chen / 2015 / Conceptual design and analysis of the helium cooled solid breeder blanket for CFETR / Fusion Eng. Des 96-97:89~94

G. Zhou / 2017 / Design study on the new EU DEMO HCPB breeding blanket : thermal analysis / Prog. Nucl. Energy 98:167~176

K. Feng / 2016 / Current progress of Chinese HCCB TBM program / Fusion Eng. Des 109:729~735

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