Optimum design of cryogenic pump for circulation cooling of high temperature superconducting cables

Kenta Tadakuma, Kazuhiro Kajikawa, Yasuharu Kamioka, Atsushi Ishiyama, Shinsaku Imagawa, Taketsune Nakamura, Hirokazu Hirai, Shinsuke Ozaki

Research output: Contribution to journalConference articlepeer-review


Pressure drops and temperature rises caused by the cooling with liquid nitrogen are evaluated for two typical examples of HTS cables. One is the three-in-one-type AC cable located inside a corrugated pipe, and the other is the single-core-type DC cable located inside a straight pipe. The theoretical expressions of pressure drop and temperature rise indicate the contributions from three components such as the friction between the liquid nitrogen and the wetted surfaces, the ratio of the heat input to the mass flow rate of liquid nitrogen and the vertical change of position along the cooling pipe. The numerically estimated results are validated by comparing them with the test results carried out by the other groups. Furthermore, the maximum feeding distance of HTS cable can be determined by adjusting the flow rate of pump if the maximum permissible pressure drop and temperature rise are fixed in advance.

Original languageEnglish
Article number012070
JournalJournal of Physics: Conference Series
Issue number1
Publication statusPublished - Oct 15 2019
Event31st International Symposium on Superconductivity, ISS 2018 - Tsukuba, Ibaraki, Japan
Duration: Dec 12 2018Dec 14 2018

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


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