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Connecting part used between high-temperature superconducting segment of heavy current lead and resistance heat exchanger

A technology of high-temperature superconductivity and heat exchangers, which is applied in the fields of connecting contact materials, nuclear power generation, and climate sustainability. It can solve problems such as increased refrigeration costs, achieve small equivalent fluid diameters, improve operational stability and Safety and high heat transfer coefficient effect

Inactive Publication Date: 2011-11-02
INST OF PLASMA PHYSICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Obviously, such a large temperature difference will lead to a substantial increase in refrigeration costs

Method used

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  • Connecting part used between high-temperature superconducting segment of heavy current lead and resistance heat exchanger
  • Connecting part used between high-temperature superconducting segment of heavy current lead and resistance heat exchanger
  • Connecting part used between high-temperature superconducting segment of heavy current lead and resistance heat exchanger

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Embodiment Construction

[0018] figure 1 It is the Bi-2223 / Ag-5.3wt.% Au superconducting tape provided by American Superconducting Corporation for HTS current leads. The critical current and the magnetic field component perpendicular to the surface of the tape are at 4 temperatures (77, 70, 64 and 50K) Relationship lines. It can be seen from the figure that the critical current of the silver-gold-based bismuth-based high-temperature superconducting tape is very sensitive to the vertical field under the self-field, and the highest self-field of a pair of extra-large current leads can often reach more than 0.1T. If the HTS operates at 77K temperature, the critical current is lower than 20% under zero field; if the temperature drops to 64K, the critical current can be increased by 3 times; if it is further reduced, the effect is even better.

[0019] Figures 2 and 3 are a connector for high heat exchange efficiency between the high-current lead high-temperature superconducting section and the resistive ...

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Abstract

The invention discloses a connecting part with a high heat exchange efficiency used between a high-temperature superconducting segment of a heavy current lead and a resistance heat exchanger. The connecting part comprises a rod-like copper core body, wherein a through hole is formed in the centre of the core body; the through hole is blocked; radial fins which are formed by cutting lines are arranged on the periphery of the through hole; flow channels are formed among the fins; a cooling airflow channel is formed in the core body on the outer side of the fins; one end of the cooling airflow channel is provided with an opening on the side wall of the core body, and the other end of the cooling airflow channel is provided with a counter bore which leads to the left end; and the left end of the core body is connected with a stainless steel shunt barrel of a high-temperature superconducting component, while the right end is connected with the resistance heat exchanger. Low-temperature tests show that the provided connecting part reduces the temperature difference between a HTS temperature end and the cooling airflow to a level of 10K, thereby greatly improving running stability and safety of the HTS current lead and reaching the advanced international standard.

Description

technical field [0001] The invention relates to a power supply feeder for a superconducting magnet in a large thermonuclear fusion device, and belongs to the technical field of a feeder for a low-temperature superconducting magnet. Background technique [0002] Thermonuclear fusion will be the way to completely solve the energy demand of mankind, and the International Thermonuclear Test Reactor (ITER) plan will be completed in the next ten years. The current leads that feed its giant low-temperature superconducting magnets are the most important source of heat load. The use of HTS current leads can save 2 / 3 of its refrigeration power consumption. In 2002 and 2003, Japan and Germany successively developed 60kA and 70kA HTS current leads for ITER magnets. The HTS assembly composed of 48 HTS superconducting stacks and stainless steel support tubes used by Japan Atomic Energy Institute is directly connected to the resistive heat exchanger composed of thousands of copper wires; ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01R4/68G21B1/21
CPCY02E30/10
Inventor 毕延芳周挺志
Owner INST OF PLASMA PHYSICS CHINESE ACAD OF SCI
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