Heat transfer performance of cryogenic oscillating heat pipes for effective cooling of superconducting magnets |
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Authors: | Kyohei Natsume Toshiyuki Mito Nagato Yanagi Hitoshi Tamura Tsutomu Tamada Koji Shikimachi Naoki Hirano Shigeo Nagaya |
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Affiliation: | aGraduate University for Advanced Studies (SOKENDAI), 322-6, Oroshi-cho, Toki, Gifu 509-5292, Japan;bNational Institute for Fusion Science, 322-6, Oroshi-cho, Toki, Gifu 509-5292, Japan;cChubu Electric Power Co., Inc., Nagoya 459-8522, Japan |
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Abstract: | The cryogenic oscillating heat pipe (OHP) for conduction cooling of superconducting magnets was developed and the function was demonstrated successfully. OHP is a highly-efficient heat transfer device using oscillating flow of two-phase mixture. The working fluids that are employed in the present research are Nitrogen, Neon and Hydrogen, and the operating temperatures are 67–91 K, 26–34 K and 17–27 K, respectively. The estimated effective thermal conductivities from the measurement data of the OHP were higher than one of the solids such as copper at low temperature. These results revealed that the cryogenic OHP can enhance the performance of cooling system for magnets. |
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Keywords: | C Heat transfer C Two-phase flow C Thermal conductivity F Superconducting magnets |
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