Present status and one upgrading method with a cold compressor of the EAST sub-cooling helium cryogenic system

doi:10.1088/2058-6272/aa58da

	Present status and one upgrading method with a cold compressor of the EAST sub-cooling helium cryogenic system
其他题名	Present status and one upgrading method with a cold compressor of the EAST sub-cooling helium cryogenic system
	Zhu, Zhigang1,2 ; Zhang, Qiyong1 ; Song, Yuntao 1; Zhuang, Ming1 ; Zhou, Zhiwei1 ; Cheng, Anyi 1; Zhu, Ping1
	2017-05-01
发表期刊	PLASMA SCIENCE & TECHNOLOGY
ISSN	1009-0630
摘要	Since 2006, the superconducting toroidal field (TF) coils of the Experimental Advanced Superconducting Tokomak (EAST) have been successfully cooled by supercritical helium at a temperature of 4.5 K and a pressure of 4 bara in eleven experiments. To obtain higher operating currents and magnetic fields it is necessary to lower the operating temperature of the TF coils. The EAST sub-cooling helium cryogenic system, with a warm oil ring pump (ORP), was tested twice in cool-down experiments, which made the TF coils operate at 3.8 K. However, the long term operational stability of the sub-cooling system cannot be guaranteed because of the ORP's poor mechanical and control performance. In this paper, the present status of the EAST subcooling helium cryogenic system is described, and then several cooling methods below 4.2 K and their merits are presented and analyzed. Finally, an upgrading method with a cold compressor for an EAST sub-cooling helium cryogenic system is proposed. The new process flow and thermodynamic calculation of the sub-cooling helium system, and the main parameters of the cold compressor, are also presented in detail. This work will provide a reference for the future upgrading of the sub-cooling helium system for higher operation parameters of the EAST device.
文章类型	Article
其他摘要	Since 2006, the superconducting toroidal field (TF) coils of the Experimental Advanced Superconducting Tokomak (EAST) have been successfully cooled by supercritical helium at a temperature of 4.5 K and a pressure of 4 bara in eleven experiments. To obtain higher operating currents and magnetic fields it is necessary to lower the operating temperature of the TF coils. The EAST sub-cooling helium cryogenic system, with a warm oil ring pump (ORP), was tested twice in cool-down experiments, which made the TF coils operate at 3.8 K. However, the long term operational stability of the sub-cooling system cannot be guaranteed because of the ORP's poor mechanical and control performance. In this paper, the present status of the EAST sub-cooling helium cryogenic system is described, and then several cooling methods below 4.2 K and their merits are presented and analyzed. Finally, an upgrading method with a cold compressor for an EAST sub-cooling helium cryogenic system is proposed. The new process flow and thermodynamic calculation of the sub-cooling helium system, and the main parameters of the cold compressor, are also presented in detail. This work will provide a reference for the future upgrading of the sub-cooling helium system for higher operation parameters of the EAST device.
关键词	East Cryogenic System Helium Refrigerator Sub-cooling Helium Cold Compressor
WOS标题词	Science & Technology ; Physical Sciences
DOI	10.1088/2058-6272/aa58da
关键词[WOS]	PERFORMANCE
收录类别	SCI
语种	英语
项目资助者	National Natural Science Foundation of China(11505237) ; National Natural Science Foundation of China(11505237) ; National Natural Science Foundation of China(11505237) ; National Natural Science Foundation of China(11505237) ; National Natural Science Foundation of China(11505237) ; National Natural Science Foundation of China(11505237) ; National Natural Science Foundation of China(11505237) ; National Natural Science Foundation of China(11505237)
WOS研究方向	Physics
WOS类目	Physics, Fluids & Plasmas
WOS记录号	WOS:000403261800016
CSCD记录号	CSCD:5977935
引用统计	被引频次：2[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.hfcas.ac.cn:8080/handle/334002/31956
专题	中科院等离子体物理研究所
作者单位	1.Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China 2.Univ Sci & Technol China, Hefei 230026, Peoples R China
第一作者单位	中科院等离子体物理研究所
推荐引用方式 GB/T 7714	Zhu, Zhigang,Zhang, Qiyong,Song, Yuntao,et al. Present status and one upgrading method with a cold compressor of the EAST sub-cooling helium cryogenic system[J]. PLASMA SCIENCE & TECHNOLOGY,2017,19(5):1-7.
APA	Zhu, Zhigang.,Zhang, Qiyong.,Song, Yuntao.,Zhuang, Ming.,Zhou, Zhiwei.,...&Zhu, Ping.(2017).Present status and one upgrading method with a cold compressor of the EAST sub-cooling helium cryogenic system.PLASMA SCIENCE & TECHNOLOGY,19(5),1-7.
MLA	Zhu, Zhigang,et al."Present status and one upgrading method with a cold compressor of the EAST sub-cooling helium cryogenic system".PLASMA SCIENCE & TECHNOLOGY 19.5(2017):1-7.

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