高 得龍, 廉 漢吉, 金 孝烽, 高 準錫, 洪 溶柱, 朴 聖濟 （Korea Institute of Machinery Materials）
Abstract:The superconducting magnetic energy storage （SMES） system is working on around 20 K， because the magnet is made of high temperature superconductor [1].
To maintain the cryogenic temperature， the superconducting coil is cooled by cryogen， helium gas or liquid neon. But there are some weak points in the cryogen cooling system. For example periodic charge of the cryogen and size is big and so on.
So， we have designed the conduction cooling system for toroidal configuration HTS SMES.
The toroidal type HTS SMES has some merits， so it is very small magnetic field leakage， and magnetic field applied perpendicular to the tape surface can be reduced [2].
Our system has 56 numbers of HTS single pancake coils and they are arrayed toroidal configuration.
The toroidal inner radius is 162 mm， and outer radius is 599 mm， and height is about 162 mm.
By the way electromagnetic force acts on inner direction in toroidal configuration.
So structure of the inner part of the toroid must be able to withstand the electromagnetic force.
In this study， we have designed the cooling structure and analyzed thermal stress and strain of the structure.
ACKNOWNLEDGMENT
This work was carried out under the support of the Ministry of Commerce， Industry and Energy， Korea.