Heat Transfer Potential of Unidirectional Porous Tubes for Gas Cooling under High Heat Flux Conditions

Kazuhisa Yuki, Risako Kibushi, Ryohei Kubota, Noriyuki Unno, Shigeru Tanaka and Kazuyuki Hokamoto
Additional contact information
Kazuhisa Yuki: Department of Mechanical Engineering, Tokyo University of Science, Yamaguchi 1-1-1 Daigakudori, Sanyo-Onoda 756-0884, Japan
Risako Kibushi: Department of Mechanical Engineering, Tokyo University of Science, Yamaguchi 1-1-1 Daigakudori, Sanyo-Onoda 756-0884, Japan
Ryohei Kubota: Department of Mechanical Engineering, Tokyo University of Science, Yamaguchi 1-1-1 Daigakudori, Sanyo-Onoda 756-0884, Japan
Noriyuki Unno: Department of Mechanical Engineering, Tokyo University of Science, Yamaguchi 1-1-1 Daigakudori, Sanyo-Onoda 756-0884, Japan
Shigeru Tanaka: Institute of Industrial Nanomaterials, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto 860-8555, Japan
Kazuyuki Hokamoto: Institute of Industrial Nanomaterials, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto 860-8555, Japan

Energies, 2022, vol. 15, issue 3, 1-10

Abstract: To discuss a suitable porous structure for helium gas cooling under high heat flux conditions of a nuclear fusion divertor, we first evaluate effective thermal conductivity of sintered copper-particles in a simple cubic lattice by direct numerical heat-conduction simulation. The simulation reveals that the effective thermal conductivity of the sintered copper-particle highly depends on the contacting state of each particle, which leads to the difficulty for the thermal design. To cope with this difficulty, we newly propose utilization of a unidirectional porous tube formed by explosive compression technology. Quantitative prediction of its cooling potential using the heat transfer correlation equation demonstrates that the heat transfer coefficient of the helium gas cooling at the pressure of 10 MPa exceeds 30,000 W/m 2 /K at the inlet flow velocity of 25 m/s, which verifies that the unidirectional porous copper tubes can be a candidate for the gas-cooled divertor concept.

Keywords: unidirectional porous tube; gas cooling; high heat flux condition; fusion reactor; divertor; effective thermal conductivity; sintered particles; porous media (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
References: View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/1996-1073/15/3/1042/pdf (application/pdf)
https://www.mdpi.com/1996-1073/15/3/1042/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:15:y:2022:i:3:p:1042-:d:738797

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().