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高温超导电缆终端恒温器热负荷的计算与测定 总被引:1,自引:0,他引:1
电力电缆已被确认为高温超导技术产业化的重要项目之一。高温超导电缆终端是运行在低温的超导电缆芯向常温的高压母线过渡和致冷剂进出口的汇集组件,具有很高的技术含量。简单地介绍高温超导电缆终端恒温器的结构和功能,主要讨论终端恒温器热负荷的理论计算方法,并与试验测定进行比较。 相似文献
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合肥超导托卡马克装置HT-7已进行了工程调试,在1.4T环向场下获得脉宽250ms,平顶幅值160kA等离子体电流。其低温系统从1995年2月6日至3月6日连续给装置供冷,带有四台活塞式膨胀机的500W/4.6K制冷机通过两次节流或喷射器给装置提供4.5K两相He流。 相似文献
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毕延芳 《等离子体科学和技术》2002,4(5):1457-1462
Superconducting (SC) tokamak HT-7U has seven pairs of buslines connecting toroidal/Poloidal coils and the current leads,These SC buslines(SCBLs) share a common cryostat and are made of the calbe in conduit conductors(CICCs) arranged as a decoupling configuration.In order to reduce the heat loads conducted from the seven current leads with a capacity of 15kA during the magnets cooldown.the buslines with a much lower thermal conduction were employed in comparison with the current leads,and a special cooling loop was designed. 相似文献
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为ITER CC 10 kA高温超导电流引线服务的低温性能测试装置已研制完成,并成功运行。其低温系统主要由500W/4.5 K氦制冷机,真空杜瓦,低温组件(低温阀门,过冷槽,管道加热器,热防护层),汽化器及低温传输管线等部分组成。本文对真空杜瓦和过冷槽进行设计,并讨论该低温系统的冷却流程方案,最后通过电流引线10 kA稳态实验结果对低温系统的运行效果进行分析,结果表明该低温系统运行稳定,能满足ITER CC电流引线的测试需要。 相似文献
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Construction of a 2kW/4K Helium Refrigerator for HT—7U 总被引:2,自引:0,他引:2
Superconducting magnets of toroidal field (TF) and poloidal field(PF) of HT-7U tokamak are all made of NbTi/Cu Cable-in-Conduit Conductor (ClCC),and cooled with a forced flow supercritical helium of 3.8K.A helium refrigerator with an equivalent capacity of 2kW/r K will be constructed.This paper presents the design of the helium refrigerator process.The thermodynamics of the refrigeration cycle and the refrigerator equipments. 相似文献
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600W/4.5K氦制冷-液化机是合肥超导托卡马克装置HT-7的低温供给系统核心设备。它具有液氮预冷,4台活塞式膨胀机,7级换热器,2个喷射器,4.5K温液氦槽和3.6K温过冷槽。1993年6月此机以液化模式运行,初调成功。最高液氦产量达160L/h. 相似文献
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HT-7U超导磁体导体摩擦系数的测定 总被引:2,自引:0,他引:2
HT-7U超导托卡马克的纵场磁体(TF)和极向场磁体(PF)都将采用3.8K超临界氦迫流冷却的CICC(Cable in Conduit Conductor)。描述了HT-7U超导托卡马克CICC的摩擦阻力实验。实验采用常温的氮气作工质,雷诺数Re范围达到300-6000。利用Katheder经验公式对实验的摩擦阻力系数进行了重新拟合,它与经验公式的计算结果存在一定的误差。给出了适于测试导体摩擦阻力系数的经验公式,以及导体在工作状态下的摩擦阻力损失。 相似文献
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A high temperature superconductor (HTS) cable system of both a length of 4 metre and a normal current of 2 KA with terminations and a cooling system has been built up and tested. The cable conductor was made of Bi-2223 tape. A space maintained vacuum between two corrugated stainless steel tubes functions as the cryostat surrounding the superconductor. A series of tests were carried out to verify the functions of the system. The important data obtained can be used to make longer HTS cable systems. 相似文献