| EAST超导托卡马克热负荷波动对低温系统液氦槽的影响 |
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| 引用本文： | 宋延熙,白红宇. EAST超导托卡马克热负荷波动对低温系统液氦槽的影响[J]. 低温工程, 2005, 0(1): 59-64 |
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| 作者姓名： | 宋延熙 白红宇 |
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| 作者单位： | 中国科学院等离子体物理研究所,合肥,230031;中国科学院等离子体物理研究所,合肥,230031 |
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| 摘 要： | EAST超导托卡马克的纵场和极向场磁体均采用NbTi超导材料,由3.8 K超临界氦冷却.在托卡马克实验运行时,极向场的放电脉冲和等离子体破裂产生的交流损耗带来的热负荷增加,经过超临界氦流带到低温系统控制阀箱内的液氦槽和过冷槽,造成槽内的液氦蒸发量增加.蒸发的氦回到制冷机中,从而影响制冷机的稳定运行.通过对实际超临界管道和液氦槽、过冷槽中换热过程建立换热模型,进行热工分析,分析液氦槽和过冷槽中的压力等参数的变化,指导低温系统的设计.
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| 关 键 词： | EAST超导托卡马克 低温系统 热负荷 等离子体破裂 |
| 文章编号： | 1000-6516(2005)01-0059-06 |
Effect on pressure in the vessels of EAST cryogenic system due to fluctuation of heat loads |
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| Song Yanxi Bai Hongyu. Effect on pressure in the vessels of EAST cryogenic system due to fluctuation of heat loads[J]. Cryogenics, 2005, 0(1): 59-64 |
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| Authors: | Song Yanxi Bai Hongyu |
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| Abstract: | The PF & TF coils of EAST superconducting Tokamak made of NbTi superconductor are cooled by supercritical helium circulating through the cooling pipe. Plasma disruption and AC losses of the superconducting magnet coils generate heat load burdening on helium containers in the crygenic control box. As a result, helium vapor increses, causing cooler instability while it is circulating within the cryogenic system. This article analyzed the mechanism of heat exchange by modeling the actual supercritical helim pipeline and the liquild helium containers, simulating parameter changes,such as pressure and flow rate of the two liquid helium containers in order to help the design of the cryogenic system. |
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| Keywords: | EAST superconducting Tokamak cryogenic system heat load plasma disruption |
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