CN116031041A - Low-flow-resistance constant-temperature-difference multichannel single-circulation helium forced flow low-temperature system for superconducting energy storage - Google Patents
Low-flow-resistance constant-temperature-difference multichannel single-circulation helium forced flow low-temperature system for superconducting energy storage Download PDFInfo
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Abstract
The invention relates to the technical field of low temperature of superconducting magnets, in particular to a low-flow-resistance constant-temperature-difference multichannel single-circulation helium forced flow low-temperature system for superconducting energy storage, which comprises the following components: a double layer vacuum helium input tube; the inlet of the multi-channel shunt is communicated with the double-layer vacuum helium input pipe, and the multi-channel shunt is arc-shaped; the concentric solenoid coil assembly is communicated with the outlet of the multi-channel shunt, the center of the multi-channel shunt and the center of the concentric solenoid coil assembly are located on the same axis, helium input by the double-layer vacuum helium input tube is forced to flow through the multi-channel shunt for shunt and then flows in along the radial direction of the concentric solenoid coil assembly, so that the problem of deviation between the helium flow direction and the conductor along the travel direction is solved, the problem of inconsistent inlet temperature of a single coil is further solved, the problem of inconsistent pressure drop change of the helium flow in the long-distance multi-layer single coil cooling process is further solved, and finally the critical characteristic of the energy storage magnet can be reduced and improved by the critical temperature.
Description
Technical Field
The invention relates to the technical field of low temperature of superconducting magnets, in particular to a low-flow-resistance constant-temperature-difference multichannel single-circulation helium forced flow low-temperature system for superconducting energy storage.
Background
The superconducting energy storage utilizes the low loss and the quick response of the superconducting magnet to store energy, and is a quick response device which can store electric energy (rectification mode) and release electric energy (inversion mode) through the interface between a modern power electronic converter and a power system. The superconducting power supply utilizes the characteristic that the resistance of the superconductor is zero, can store electric energy in the inductance coil of the superconductor without loss, can achieve the purposes of storing electric energy in a large capacity, improving the power supply quality, improving the system capacity and the like, can rapidly exchange active power and reactive power with an external system through the power electronic converter, and is used for improving the stability of the whole power system and improving the power supply quality. The device generally comprises a superconducting coil, a low-temperature container, a refrigerating device, a converter and a measurement and control system component. The superconducting energy storage has many advantages, such as high power, light weight, small volume, small loss, quick response, and the like, so the superconducting energy storage has wide application. Such as high power lasers, require thousands or tens of kilojoules of energy to be instantaneously extracted, which can be accommodated by the superconducting energy storage device. Superconducting energy storage may also be used in the power grid. When the load in the large power grid is small, redundant electric energy is stored, and when the load is large, the electric energy is returned to the power grid, so that the contradiction between supply and demand in the process of using electricity to high peaks and low valleys can be avoided.
The low-temperature system is used as an important component of the superconducting energy storage magnet and provides a required low-temperature environment for each low-temperature component of the superconducting energy storage magnet. The whole low-temperature system has a complex structure, relates to 4.2K/3.5bar helium forced flow, and consumes energy due to friction between internal fluids and between the internal fluids and a pipe wall when the fluid flows along the pipe in a helium forced flow mode for superconducting energy storage, so that the pressure drop along the way is caused. When the fluid flows through the pipeline accessories with inconsistent deviation of the direction, local vortex and impact are generated due to the deviation of the flowing direction and the speed, and the local pressure drop is caused by consuming energy, so that the problem of inconsistent variation of the helium flow pressure drop in the cooling process is caused.
Disclosure of Invention
The invention aims to provide a low-flow-resistance constant-temperature-difference multichannel single-circulation helium forced flow low-temperature system for superconducting energy storage and a method thereof, so as to solve the problems in the prior art.
In order to achieve the above object, an aspect of the present invention provides the following technical solutions:
a low flow resistance constant temperature difference multichannel single circulation helium forced flow low temperature system for superconducting energy storage comprises:
a double layer vacuum helium input tube;
the inlet of the multi-channel shunt is communicated with the double-layer vacuum helium input pipe, and the multi-channel shunt is arc-shaped;
and the concentric solenoid coil assembly is communicated with the outlet of the multi-channel flow divider, and the circle center of the multi-channel flow divider and the circle center of the concentric solenoid coil assembly are positioned on the same axis.
Preferably, the double-layer vacuum helium input pipe comprises:
an external Dewar connecting pipe;
the inner helium pipe channel is arranged in the outer Dewar connecting pipeline, and a vacuum environment is formed between the inner helium pipe channel and the outer Dewar connecting pipeline;
a helium forced flow inlet tube in communication with the bottom of the internal helium tube passageway.
Preferably, the double-layer vacuum helium input pipe further comprises a helium inlet sealing flange welded to the bottom of the internal helium pipe channel and sealed with polytetrafluoroethylene.
Preferably, the multi-channel shunt comprises:
a helium forced flow inlet in communication with the helium forced flow inlet tube;
the cold accumulation block is arranged at the upper end of the cold accumulation block and used for shunting and cooling the helium forced flow;
the inlets of the L-shaped shunt regulating pipes are communicated with the cold accumulation block, and the L-shaped shunt regulating pipes are arranged along the radial direction of the multichannel shunt;
the outlets of the L-shaped shunt regulating pipes are communicated with the constant temperature difference balancing blocks;
the plurality of helium forced flow split outlets are arranged on one side of the constant temperature difference balance block, which faces the concentric solenoid coil assembly, and correspond to the plurality of L-shaped split regulating pipes.
Preferably, the multi-channel flow divider further comprises a fin cold guide belt, and two ends of the fin cold guide belt are respectively connected with the cold accumulation block and the constant temperature difference balancing block.
Preferably, the concentric solenoid coil assembly comprises:
a plurality of single coil inlet lines, the inlets of the plurality of single coil inlet lines being in respective corresponding communication with the plurality of helium forced flow split outlets, the plurality of single coil inlet lines being disposed radially of the concentric solenoid coil assembly;
the solenoid superconducting coils are concentrically arranged in multiple layers, and inlets at the bottoms of the solenoid superconducting coils are correspondingly communicated with outlets of the single-coil inlet pipelines respectively;
the outlets at the tops of the solenoid superconducting coils are correspondingly communicated with the inlets of the single-coil outlet pipelines respectively, and the single-coil outlet pipelines are arranged at 15-degree intervals.
Preferably, the plurality of single coil outlet lines are provided with a cryogenic valve and a flow meter.
Compared with the prior art, the invention has the beneficial effects that:
according to the low-flow-resistance constant-temperature-difference multichannel single-circulation helium forced flow low-temperature system for superconducting energy storage, the multichannel shunt and the concentric solenoid coil assembly are concentrically arranged, the L-shaped shunt regulating pipes and the single-coil inlet pipelines are arranged along the radial direction of the concentric solenoid coil assembly, so that helium input by the double-layer vacuum helium input pipe is forced to flow through the multichannel shunt and flow in the radial direction of the concentric solenoid coil assembly after being shunted, the problem of deviation of helium flow direction and conductor along the path direction is solved, the problem of inconsistent inlet temperature of a single coil is further solved, the problem of inconsistent pressure drop change of helium flow in the long-distance multilayer single-coil cooling process is optimized, and finally the critical characteristic of an energy storage magnet can be reduced and improved.
Drawings
FIG. 1 is a schematic diagram of a low flow resistance constant temperature difference multichannel single circulation helium forced flow cryogenic system for superconducting energy storage according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a double-layer vacuum helium input tube of a low-flow-resistance constant-temperature-difference multichannel single-circulation helium forced-flow low-temperature system for superconducting energy storage, which is provided by the embodiment of the invention;
FIG. 3 is a schematic diagram of a multi-channel shunt of a low flow resistance constant temperature difference multi-channel single circulation helium forced flow cryogenic system for superconducting energy storage according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a concentric solenoid coil assembly of a low flow resistance constant temperature differential multichannel single circulation helium forced flow cryogenic system for superconducting energy storage according to an embodiment of the present invention.
In the figure: 1. a double layer vacuum helium input tube; 11. an external Dewar connecting pipe; 12. an internal helium tube passageway; 13. a helium inlet sealing flange; 14. a helium forced flow inlet pipe; 2. a multi-channel shunt; 21. helium forced inflow port; 22. a cold accumulation block; 23. a plurality of L-shaped shunt regulator tubes; 24. constant temperature difference balance block; 25. helium forced flow split outlet; 26. a fin cold guide belt; 3. a concentric solenoid coil assembly; 31. a plurality of single coil inlet lines; 32. a plurality of solenoidal superconducting coils; 33. a plurality of single coil outlet lines; 34. a low temperature valve; 35. a flow meter.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Fig. 1 is a schematic diagram of a low flow resistance constant temperature difference multichannel single circulation helium forced flow low temperature system for superconducting energy storage according to an embodiment of the present invention. Embodiments of the present invention provide a low flow resistance constant temperature difference multichannel single circulation helium forced flow cryogenic system for superconducting energy storage, as shown in fig. 1, comprising:
a double-layer vacuum helium input pipe 1;
the inlet of the multi-channel shunt 2 is communicated with the double-layer vacuum helium input pipe 1, and the multi-channel shunt 2 is arc-shaped;
and the concentric solenoid coil assembly 3 is communicated with the outlet of the multi-channel shunt 2, the center of the multi-channel shunt 2 and the center of the concentric solenoid coil assembly 3 are positioned on the same axis, and helium input by the double-layer vacuum helium input tube 1 is forced to flow through the multi-channel shunt 2 for shunt and then flows in along the radial direction of the concentric solenoid coil assembly 3.
According to the low-flow-resistance constant-temperature-difference multichannel single-circulation helium forced flow low-temperature system for superconducting energy storage, provided by the embodiment of the invention, helium input by the double-layer vacuum helium input tube 1 is forced to flow through the multichannel shunt 2 for diversion and flows in the radial direction of the concentric solenoid coil assembly 3, so that the problem of deviation between the helium flow direction and the conductor along the travel direction is solved, the problem of inconsistent inlet temperature of a single coil is further solved, the problem of inconsistent pressure drop change of the helium flow in the long-distance multilayer single-coil cooling process is further solved, and finally, the critical temperature can be reduced, and the critical characteristic of an energy storage magnet is improved.
FIG. 2 is a schematic diagram of a double-layer vacuum helium input tube of a low-flow-resistance constant-temperature-difference multichannel single-circulation helium forced-flow low-temperature system for superconducting energy storage, which is provided by the embodiment of the invention. In one embodiment of the present invention, as shown in fig. 2, the double-layer vacuum helium input pipe 1 of the low-flow-resistance constant-temperature-difference multi-channel single-circulation helium forced flow cryogenic system for superconducting energy storage can comprise:
an external dewar connection line 11;
an inner helium pipe channel 12, wherein the inner helium pipe channel 12 is arranged inside the outer Dewar connecting pipeline 11, and a vacuum environment is formed between the inner helium pipe channel 12 and the outer Dewar connecting pipeline 11;
a helium forced flow inlet pipe 14, the helium forced flow inlet pipe 14 communicating with the bottom of the internal helium pipe channel 12.
Through the technical scheme, the vacuum interlayer is formed between the outer Dewar connecting pipeline 11 and the inner helium pipe channel 12 in the double-layer vacuum helium input pipe 1 and the vacuum degree of the outer vacuum Dewar, a helium infusion pipe can be inserted into the inner helium pipe channel 12 to form double-layer vacuum, the helium forced flow inlet pipe 14 has a longer length, and accordingly the helium forced flow inlet pipe extends to the bottom of the concentric solenoid coil assembly 3 to enter helium forced flow, so that the inlet pressure is reduced by utilizing the influence that the helium density is lower than the air density, and stable inlet temperature is formed.
Further, as shown in fig. 2, the double-layer vacuum helium input pipe 1 of the low-flow-resistance constant-temperature-difference multi-channel single-circulation helium forced flow low-temperature system for superconducting energy storage further comprises a helium inlet sealing flange 13, wherein the helium inlet sealing flange 13 is welded at the bottom of the inner helium pipe channel 12 and is sealed by polytetrafluoroethylene. Sealing the helium inlet sealing flange 13 with polytetrafluoroethylene ensures that no leakage of helium forced flow occurs.
Fig. 3 is a schematic structural diagram of a multichannel shunt of a low-flow-resistance constant-temperature-difference multichannel single-circulation helium forced-flow low-temperature system for superconducting energy storage according to an embodiment of the invention. In one embodiment of the present invention, as shown in fig. 3, the multi-channel shunt 2 of the low-flow resistance constant temperature difference multi-channel single-circulation helium forced flow cryogenic system for superconducting energy storage may comprise:
a helium forced inflow port 21, the helium forced inflow port 21 being in communication with the helium forced inflow port pipe 14;
the cold accumulation block 22, the helium forced inflow port 21 is set up in the upper end of the cold accumulation block 22, the cold accumulation block 22 is the hollow structure;
the inlets of the L-shaped shunt regulating pipes 23 are communicated with the cold accumulation block 22, and the L-shaped shunt regulating pipes 23 are arranged along the radial direction of the multichannel shunt 2;
the outlets of the L-shaped shunt regulating pipes 23 are communicated with the constant temperature difference balance block 24;
the plurality of helium forced flow split outlets 25 are arranged on one side of the constant temperature difference balance block 24 facing the concentric solenoid coil assembly 3, and the plurality of helium forced flow split outlets 25 correspond to the plurality of L-shaped split regulating pipes 23.
According to the low-flow-resistance constant-temperature-difference multichannel single-circulation helium forced flow low-temperature system for superconducting energy storage, helium forced flow input through a double-layer vacuum helium input pipe 1 flows into a cold accumulation block 22 from a helium forced flow inlet pipe 14 through a helium forced flow inlet 21, is split through a plurality of L-shaped split regulating pipes 23, flows to a plurality of helium forced flow split outlets 25 through a constant-temperature-difference balance block 24 and then flows into a concentric solenoid coil assembly 3; the L-shaped shunt regulating pipes 23 play a role in communicating and conveying between the helium forced flow inlet 21 and the concentric solenoid coil assembly 3, and meanwhile, as the L-shaped shunt regulating pipes 23 are arranged along the radial direction of the multi-channel shunt 2, the direction of helium forced flow can be regulated to vertically enter the concentric solenoid coil assembly 3, the constant temperature difference balancing block 24 provides a balancing channel when the pipeline is divided into the flow paths, the rapid rising of pressure is prevented, the temperature of the helium forced flow entering the single coil is ensured, the temperature of each path of helium flow is balanced to be consistent, and the temperature difference is reduced; a plurality of helium forced flow diversion outlets 25 are connected with the concentric solenoid coil assembly 3 to ensure that the helium flow direction is perpendicular to the conduit strike cross section and to provide maximum helium flow inlet mass flow.
Further, as shown in fig. 3, the multi-channel shunt 2 of the low-flow-resistance constant-temperature-difference multi-channel single-circulation helium forced flow low-temperature system for superconducting energy storage further comprises a fin cold guide belt 26, and two ends of the fin cold guide belt 26 are respectively connected with the cold storage block 22 and the constant-temperature-difference balance block 24. The fin cold guide strips 26 connect the cold accumulation blocks 22 and the constant temperature difference balance blocks 24 to prevent the occurrence of eddy current between the cold guide structures to generate alternating current loss.
Fig. 4 is a schematic structural view of a concentric solenoid coil assembly of a low flow resistance constant temperature difference multi-channel single circulation helium forced flow cryogenic system for superconducting energy storage according to an embodiment of the present invention, in one embodiment of the present invention, as shown in fig. 4, a concentric solenoid coil assembly 3 of a low flow resistance constant temperature difference multi-channel single circulation helium forced flow cryogenic system for superconducting energy storage may include:
a plurality of single-coil inlet lines 31, the inlets of the plurality of single-coil inlet lines 31 being respectively and correspondingly communicated with the plurality of helium forced flow split outlets 25, the plurality of single-coil inlet lines 31 being arranged in the radial direction of the concentric solenoid coil assembly 3;
a plurality of solenoid superconducting coils 32, the plurality of solenoid superconducting coils 32 are concentrically arranged in a plurality of layers, and inlets at the bottoms of the plurality of solenoid superconducting coils 32 are correspondingly communicated with outlets of the plurality of single-coil inlet pipelines 31 respectively;
the outlets of the tops of the plurality of solenoid superconducting coils 32 are respectively and correspondingly communicated with the inlets of the plurality of single-coil outlet pipelines 33, and the plurality of single-coil outlet pipelines 33 are arranged at intervals of 15 degrees.
Through the above technical solution, helium flowing out from the plurality of helium forced flow diversion outlets 25 is forced to flow through the plurality of single-coil inlet pipelines 31, flows in from inlets at the bottoms of the plurality of solenoid superconducting coils 32, and then flows in the plurality of single-coil outlet pipelines 33 from outlets at the tops of the plurality of solenoid superconducting coils 32, thereby completing a low-temperature cold conduction single cycle; the radial arrangement of the plurality of single coil inlet lines 31 along the concentric solenoid coil assembly 3 balances the helium flow direction and conductor in-path direction deviations, further improving single coil inlet temperature inconsistencies. The plurality of single-coil outlet pipelines 33 are arranged at intervals of 15 degrees, so that the mass flow of the cooling medium can be regulated in series according to actual conditions, and the stability and safety of the single-coil temperature difference grade are further improved.
Further, as shown in fig. 4, a plurality of single-coil outlet pipelines 33 of the low-flow-resistance constant-temperature-difference multi-channel single-circulation helium forced flow low-temperature system for superconducting energy storage are provided with a low-temperature valve 34 and a flowmeter 35. The solenoid superconducting coil 32 operating temperature is largely dependent on the process complexity of the liquid helium temperature regime achievable, provided that the solenoid superconducting coil 32 is required to meet temperature margins. The boiling point of liquid helium at normal pressure is 4.2K, so when helium forced flow cooling is used, the low temperature valve 34 and the flow meter 35 are used to adjust the size of the inlet and outlet pressure drop of the single circuit to be less than 0.5bar, and the operation temperature of helium is prevented from rising along with the increase of pressure.
Working principle:
in the double-layer vacuum helium input pipe 1 of the low-flow-resistance constant-temperature-difference multichannel single-circulation helium forced flow low-temperature system provided by the embodiment of the invention, a vacuum interlayer is formed between an outer Dewar connecting pipeline 11 and an inner helium pipe channel 12, a helium infusion pipe can be inserted into the inner helium pipe channel 12 to form double-layer vacuum, the input helium forced flow flows into a cold accumulation block 22 from a helium forced flow inlet pipe 14 through a helium forced flow inlet 21, flows into a plurality of helium forced flow split outlets 25 through a plurality of L-shaped split regulating pipes 23 to form split flows through a constant-temperature difference balance block 24, helium flowing out of the plurality of helium forced flow split outlets 25 flows into a plurality of single-coil inlet pipelines 31 from inlets at the bottoms of a plurality of solenoid superconducting coils 32, and then flows into a plurality of single-coil outlet pipelines 33 from outlets at the tops of the plurality of solenoid superconducting coils 32, so that low-temperature cold conduction single-circulation is completed; through setting up multichannel shunt 2 and concentric solenoid coil subassembly 3 with the concentric, and set up a plurality of L type reposition of redundant personnel regulating pipe 23 and a plurality of single coil entry pipeline 31 along the radial of concentric solenoid coil subassembly 3, make the helium that double-deck vacuum helium input pipe 1 input force to flow through multichannel shunt 2 reposition of redundant personnel after, radial inflow along concentric solenoid coil subassembly 3, thereby solve helium flow direction and conductor along the deviation problem of journey direction, further improve single coil entry temperature inconsistency, optimize the inconsistent problem of helium flow pressure drop variation in the long distance multilayer single coil cooling process, finally can reduce critical temperature and promote the critical characteristic of energy storage magnet.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The low-flow-resistance constant-temperature-difference multichannel single-circulation helium forced flow low-temperature system for superconducting energy storage is characterized by comprising:
a double-layer vacuum helium input pipe (1);
a multi-channel flow divider (2), wherein an inlet of the multi-channel flow divider (2) is communicated with the double-layer vacuum helium input pipe (1), and the multi-channel flow divider (2) is arc-shaped;
the concentric solenoid coil assembly (3), concentric solenoid coil assembly (3) with the export intercommunication of multichannel shunt (2), the centre of a circle of multichannel shunt (2) with the centre of a circle of concentric solenoid coil assembly (3) is located the same axis, the helium of double-deck vacuum helium input tube (1) is forced to flow through after multichannel shunt (2) reposition of redundant personnel, along the radial inflow of concentric solenoid coil assembly (3).
2. The low flow resistance constant temperature difference multichannel single circulation helium forced flow cryogenic system for superconducting energy storage according to claim 1, characterized in that the double layer vacuum helium input pipe (1) comprises:
an external Dewar connecting pipe (11);
an inner helium pipe channel (12), wherein the inner helium pipe channel (12) is arranged inside the outer Dewar connecting pipeline (11), and a vacuum environment is formed between the inner helium pipe channel (12) and the outer Dewar connecting pipeline (11);
-a helium forced flow inlet pipe (14), said helium forced flow inlet pipe (14) communicating with the bottom of said internal helium pipe channel (12).
3. The low flow resistance constant temperature difference multichannel single circulation helium forced flow cryogenic system for superconducting energy storage according to claim 2, characterized in that the double layer vacuum helium input pipe (1) further comprises a helium inlet sealing flange (13), the helium inlet sealing flange (13) is welded at the bottom of the inner helium pipe channel (12) and sealed by polytetrafluoroethylene.
4. The low flow resistance constant temperature difference multichannel single circulation helium forced flow cryogenic system for superconducting energy storage according to claim 2, characterized in that the multichannel shunt (2) comprises:
a helium forced flow inlet (21), the helium forced flow inlet (21) being in communication with the helium forced flow inlet tube (14);
the cold accumulation block (22), the said helium forces the inflow port (21) to set up in the upper end of the said cold accumulation block (22), the said cold accumulation block (22) is the hollow structure;
a plurality of L-shaped shunt regulating pipes (23), wherein the inlets of the L-shaped shunt regulating pipes (23) are communicated with the cold accumulation block (22), and the L-shaped shunt regulating pipes (23) are arranged along the radial direction of the multichannel shunt (2);
the outlets of the L-shaped shunt regulating pipes (23) are communicated with the constant temperature difference balancing blocks (24);
the plurality of helium forced flow split outlets (25) are arranged on one side of the constant temperature difference balance block (24) facing the concentric solenoid coil assembly (3), and the plurality of helium forced flow split outlets (25) and the plurality of L-shaped split regulating pipes (23) correspond to each other.
5. A low flow resistance constant temperature difference multichannel single circulation helium forced flow cryogenic system for superconducting energy storage according to claim 3, characterized in that the multichannel diverter (2) further comprises a fin cold guide belt (26), two ends of the fin cold guide belt (26) are respectively connected with the cold storage block (22) and the constant temperature difference balance block (24).
6. The low flow resistance constant temperature difference multichannel single circulation helium forced flow cryogenic system for superconducting energy storage of claim 4, wherein the concentric solenoid coil assembly (3) comprises:
-a plurality of single-coil inlet lines (31), the inlets of the plurality of single-coil inlet lines (31) being in respective corresponding communication with the plurality of helium forced flow distribution outlets (25), the plurality of single-coil inlet lines (31) being arranged radially of the concentric solenoid coil assembly (3);
a plurality of solenoidal superconducting coils (32), wherein the solenoidal superconducting coils (32) are concentrically and multiply arranged, and inlets at the bottoms of the solenoidal superconducting coils (32) are correspondingly communicated with outlets of the single-coil inlet pipelines (31) respectively;
the outlets at the tops of the solenoid superconducting coils (32) are correspondingly communicated with inlets of the single-coil outlet pipelines (33), and the single-coil outlet pipelines (33) are arranged at 15-degree intervals.
7. The low flow resistance constant temperature difference multichannel single circulation helium forced flow cryogenic system for superconducting energy storage according to claim 6, characterized in that cryogenic valve (34) and flowmeter (35) are arranged on the plurality of single coil outlet pipes (33).
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| CN202310239622.9A CN116031041A (en) | 2023-03-14 | 2023-03-14 | Low-flow-resistance constant-temperature-difference multichannel single-circulation helium forced flow low-temperature system for superconducting energy storage |
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| CN116864258A (en) * | 2023-08-08 | 2023-10-10 | 西安聚能超导磁体科技有限公司 | Support connection structure and superconducting magnet |
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| CN116864258A (en) * | 2023-08-08 | 2023-10-10 | 西安聚能超导磁体科技有限公司 | Support connection structure and superconducting magnet |
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