TY - JOUR
T1 - Optimum design of cryogenic pump for circulation cooling of high temperature superconducting cables
AU - Tadakuma, Kenta
AU - Kajikawa, Kazuhiro
AU - Kamioka, Yasuharu
AU - Ishiyama, Atsushi
AU - Imagawa, Shinsaku
AU - Nakamura, Taketsune
AU - Hirai, Hirokazu
AU - Ozaki, Shinsuke
N1 - Funding Information:
This work was supported by the Advanced Low Carbon Technology Research and Development Program (ALCA) from the Japan Science and Technology Agency (JST).
Publisher Copyright:
© 2019 Published under licence by IOP Publishing Ltd.
PY - 2019/10/15
Y1 - 2019/10/15
N2 - 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.
AB - 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.
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U2 - 10.1088/1742-6596/1293/1/012070
DO - 10.1088/1742-6596/1293/1/012070
M3 - Conference article
AN - SCOPUS:85075925818
SN - 1742-6588
VL - 1293
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
IS - 1
M1 - 012070
T2 - 31st International Symposium on Superconductivity, ISS 2018
Y2 - 12 December 2018 through 14 December 2018
ER -