Differential pressure driven jet type high temperature superconducting cooling device and method
A differential pressure-driven, high-temperature superconducting technology, used in household refrigeration devices, superconducting magnets/coils, lighting and heating equipment, etc., can solve problems such as rapid recooling of superconducting materials
Inactive Publication Date: 2017-05-31
ZHEJIANG UNIV
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Problems solved by technology
[0006] The invention provides a jet-type high-temperature superconducting cooling device driven by pressure difference, which effectively solves the problem of rapid recooling of superconducting materials with high heat capacity at the moment of superconducting current limiter quenching
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[0030] This embodiment takes liquid nitrogen as an example for illustration, as figure 2 As shown, the jet-type high-temperature superconducting cooling device driven by pressure difference in this embodiment includes a liquid nitrogen tank 1, a superconducting flow limiter 2, a low-temperature diversion pipeline 5 with a jet diversion hole 6, and an automatic opening and closing of the gas phase region. Valve 3, automatic opening and closing valve 8 in the liquid phase area, nitrogen buffer tank 4 and high-pressure supercooled liquid nitrogen tank 7.
[0031] The superconducting current limiter 2 is completely submerged in the liquid nitrogen at the lower part of the liquid nitrogen tank 1, and the upper high-pressure nitrogen zone is connected with the nitrogen buffer tank 4 through pipelines. The low-temperature diversion pipe 5 passes through the central area of the superconducting flow limiter 2, and the pipeline area connected to the superconducting flow limiter 2 is ...
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The invention discloses a differential pressure driven jet type high temperature superconducting cooling device. The differential pressure driven jet type high temperature superconducting cooling device comprises a cryogenic liquid immersion tank, a superconducting fault current limiter immersed in the cryogenic liquid immersion tank, and a gas buffer tank which is connected with a low pressure gas area at the upper layer of the cryogenic liquid immersion tank through a first adjusting valve; the differential pressure driven jet type high temperature superconducting cooling device also comprises a cryogenic diversion pipeline and a high pressure supercooled liquid tank. The cryogenic diversion pipeline is arranged in the cryogenic liquid immersion tank, and the pipe body is provided with a plurality of jet diversion holes facing toward the surface of the superconducting fault current limiter; the high pressure supercooled liquid tank is communicated with the cryogenic diversion pipeline through a second adjusting valve, passes a supercooled liquid through the cryogenic diversion pipeline so that the supercooled liquid produces a high velocity jet fluid at the jet diversion holes. The device and method can greatly improve the heat conduction property of the surface of the superconducting fault current limiter, increase re-cooling of the superconducting fault current limiter, and effectively reduce the rewarming time of the superconducting fault current limiter.
Description
technical field [0001] The invention relates to the field of high-temperature superconducting cooling, in particular to a jet-type high-temperature superconducting cooling device and method driven by differential pressure. Background technique [0002] With the increasing scale of the transmission and distribution network, the degree of grid interconnection is getting higher and higher. The interconnection of the grid improves the transmission efficiency of the grid, but it also makes the short-circuit impedance of the grid smaller and smaller, and the short-circuit current level increases sharply. At present, the short-circuit current level of many power grids has exceeded or is about to exceed the range that the existing circuit breakers can handle, and there are great hidden dangers in the operation safety of the power grid. To solve the problem of excessive short-circuit current on the equipment, high-impedance transformers or current-limiting reactors are traditionally...
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IPC IPC(8): H01F6/04F25D3/10
CPCF25D3/10H01F6/04
Inventor 植晓琴朱少龙邱利民孙大明
Owner ZHEJIANG UNIV