Open AccessOptimum design of cryogenic pump for circulation cooling of high temperature superconducting cables
Author(s) -
Kenta Tadakuma,
Kazuhiro Komori,
Yasuharu Kamioka,
Atsushi Ishiyama,
S. Imagawa,
Taketsune Nakamura,
Hirokazu Hirai,
Shinsuke Ozaki
Publication year - 2019
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1293/1/012070
Subject(s) - liquid nitrogen , pressure drop , materials science , cryogenics , mechanics , volumetric flow rate , mass flow rate , nitrogen , flow (mathematics) , water cooling , mass flow , thermodynamics , chemistry , physics , organic chemistry
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.