A 100-W GRADE CLOSED-CYCLE THERMOSYPHON COOLING SYSTEM USED IN HTS ROTATING MACHINES

被引：18

作者：

Felder, B. ^{[1
]}

Miki, M. ^{[1
]}

Tsuzuki, K. ^{[1
]}

Shinohara, N. ^{[1
]}

Hayakawa, H. ^{[2
]}

Izumi, M. ^{[1
]}

机构：

[1] Tokyo Univ Marine Sci & Technol, Koto Ku, Tokyo 1358533, Japan

[2] Kitano Seiki Co Ltd, Ota Ku, Tokyo, Japan

来源：

ADVANCES IN CRYOGENIC ENGINEERING, VOLS 57A AND 57B | 2012年 / 1434卷

基金：

日本科学技术振兴机构;

关键词：

Helium-neon mixture; HTS rotating machines; neon thermosyphon;

D O I：

10.1063/1.4706947

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The cooling systems used for rotating High-Temperature Superconducting (HTS) machines need a cooling power high enough to ensure a low temperature during various utilization states. Radiation, torque tube or current leads represent hundreds of watts of invasive heat. The architecture also has to allow the rotation of the refrigerant. In this paper, a free-convection thermosyphon using two Gifford-McMahon (GM) cryocoolers is presented. The cryogen is mainly neon but helium can be added for an increase of the heat transfer coefficient. The design of the heat exchangers was first optimized with FEM thermal analysis. After manufacture, they were assembled for preliminary experiments and the necessity of annealing was studied for the copper parts. A single evaporator was installed to evaluate the thermal properties of such a heat syphon. The maximum bearable static heat load was also investigated, but was not reached even at 150 W of load. Finally, this cooling system was tested in the cooling down of a 100-kW range HTS rotating machine containing 12 Bi-2223 double-pancake coils (DPC).

引用

页码：417 / 424

页数：8

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