Enhancement of cooling performance of a helium-cooled divertor through the addition of rib structures on the jet-impingement area

Joon Soo Lim, Namkyu Lee, B. E. Ghidersa, Hyung Hee Cho

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The development of nuclear fusion, which is an environmentally friendly and future-oriented power generation method, needs to be developed for the prevention of global warming caused by the excessive use of fossil fuels. However, there are many scientific and technical challenges that should be overcome for the use of nuclear fusion reactors. The development of a divertor is one such challenge, in that it should be able to endure a high heat flux (∼10 MW/m2) and a particle flux (∼1024/s). To solve this challenge, the Karlsruhe Institute Technology (KIT) has been developing a helium-cooled divertor with a multi-array impingement jet. The main objective of developing this divertor module is not only to sufficiently dissipate the high thermal load from plasma for a reliable operation, but also to maintain a moderate pressure drop. To achieve this objective, we should understand the heat transfer characteristics of the divertor module and enhance the thermal performance, namely, the thermal conductance and pressure drop. The present study is aimed at an enhancement of the cooling performance of a helium-cooled divertor through the addition of rib structures in the divertor module. The results show that the convective conductance with rib turbulators is increased through an increase in the interfacial area on a heated surface. In addition, the thermal performance of the divertor module is enhanced by 20% or more compared with a no rib case.

Original languageEnglish
Pages (from-to)655-660
Number of pages6
JournalFusion Engineering and Design
Volume136
DOIs
Publication statusPublished - 2018 Nov

Fingerprint

Helium
Cooling
Pressure drop
Plasma Gases
Fusion reactors
Global warming
Thermal load
Fossil fuels
Power generation
Heat flux
Fusion reactions
Fluxes
Heat transfer
Plasmas
Hot Temperature

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Nuclear Energy and Engineering
  • Materials Science(all)
  • Mechanical Engineering

Cite this

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title = "Enhancement of cooling performance of a helium-cooled divertor through the addition of rib structures on the jet-impingement area",
abstract = "The development of nuclear fusion, which is an environmentally friendly and future-oriented power generation method, needs to be developed for the prevention of global warming caused by the excessive use of fossil fuels. However, there are many scientific and technical challenges that should be overcome for the use of nuclear fusion reactors. The development of a divertor is one such challenge, in that it should be able to endure a high heat flux (∼10 MW/m2) and a particle flux (∼1024/s). To solve this challenge, the Karlsruhe Institute Technology (KIT) has been developing a helium-cooled divertor with a multi-array impingement jet. The main objective of developing this divertor module is not only to sufficiently dissipate the high thermal load from plasma for a reliable operation, but also to maintain a moderate pressure drop. To achieve this objective, we should understand the heat transfer characteristics of the divertor module and enhance the thermal performance, namely, the thermal conductance and pressure drop. The present study is aimed at an enhancement of the cooling performance of a helium-cooled divertor through the addition of rib structures in the divertor module. The results show that the convective conductance with rib turbulators is increased through an increase in the interfacial area on a heated surface. In addition, the thermal performance of the divertor module is enhanced by 20{\%} or more compared with a no rib case.",
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Enhancement of cooling performance of a helium-cooled divertor through the addition of rib structures on the jet-impingement area. / Lim, Joon Soo; Lee, Namkyu; Ghidersa, B. E.; Cho, Hyung Hee.

In: Fusion Engineering and Design, Vol. 136, 11.2018, p. 655-660.

Research output: Contribution to journalArticle

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