CN119296909A - A superconducting magnet cold energy recovery system - Google Patents
A superconducting magnet cold energy recovery system Download PDFInfo
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- CN119296909A CN119296909A CN202411476249.XA CN202411476249A CN119296909A CN 119296909 A CN119296909 A CN 119296909A CN 202411476249 A CN202411476249 A CN 202411476249A CN 119296909 A CN119296909 A CN 119296909A
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- cold
- helium
- energy recovery
- recovery system
- superconducting magnet
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F6/00—Superconducting magnets; Superconducting coils
- H01F6/04—Cooling
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D3/00—Devices using other cold materials; Devices using cold-storage bodies
- F25D3/10—Devices using other cold materials; Devices using cold-storage bodies using liquefied gases, e.g. liquid air
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Containers, Films, And Cooling For Superconductive Devices (AREA)
Abstract
本发明涉及超导磁体技术领域，具体的说是一种超导磁体冷能回收系统。一种超导磁体冷能回收系统，包括壳体，所述的壳体为杜瓦容器，其特征在于：壳体的内部设有冷屏，位于冷屏的外侧设有钢管盘；冷屏的内部设有冷屏罐，位于冷屏罐顶部的一侧连接液氦进口，冷屏罐顶部的另一侧连接冷却系统出口；冷屏罐的内部设有超导线圈，超导线圈的两端分别连接电流导线。同现有技术相比，提供一种超导磁体冷能回收系统，通过使电流引线的低温氦气进口与超导线圈的低温氦气出口进行热交换，使进入电流引线的氦气进行预冷，以回收从超导线圈出来的低温氦气冷能。
The present invention relates to the technical field of superconducting magnets, and more specifically, to a superconducting magnet cold energy recovery system. A superconducting magnet cold energy recovery system comprises a shell, wherein the shell is a Dewar container, and is characterized in that: a cold shield is provided inside the shell, and a steel pipe disc is provided outside the cold shield; a cold shield tank is provided inside the cold shield, and one side located at the top of the cold shield tank is connected to a liquid helium inlet, and the other side of the top of the cold shield tank is connected to a cooling system outlet; a superconducting coil is provided inside the cold shield tank, and both ends of the superconducting coil are respectively connected to current conductors. Compared with the prior art, a superconducting magnet cold energy recovery system is provided, which pre-cools the helium entering the current lead by heat exchanging the low-temperature helium inlet of the current lead with the low-temperature helium outlet of the superconducting coil, so as to recover the low-temperature helium cold energy coming out of the superconducting coil.
Description
Technical Field
The invention relates to the technical field of superconducting magnets, in particular to a superconducting magnet cold energy recovery system.
Background
The use of liquid helium in superconducting magnets is of great importance, but its scarcity is also a non-negligible problem.
Liquid helium is extracted from natural gas, mainly in areas where helium reserves are available. The major helium producing countries worldwide include the united states, cartal, russia and allria. Helium is a very light gas that escapes in the earth's atmosphere and therefore its resources are limited and not renewable.
Natural helium resources are limited and the collection and separation process of helium is costly. The reserves of many helium fields are gradually depleted, making the discovery and development of new resources more difficult. Therefore, the reserves of helium are limited.
The production and transportation costs of liquid helium are high, especially during the process of cooling helium to its liquefaction point (-269 ℃) to make liquid helium. This makes the price of liquid helium relatively expensive.
With advances in technology, the demand for superconducting magnets, and in particular in the fields of medical imaging (e.g., MRI), particle accelerators, and high-energy physics experiments, has increased, as has the demand for liquid helium.
The superconducting magnet needs to be kept at a very low temperature during operation to maintain the superconducting state. The low temperature (near absolute zero) of liquid helium enables the superconductor to operate without energy consumption. This temperature is critical to the performance of the superconducting magnet, so liquid helium becomes the critical coolant for this process.
The operating and maintenance costs of superconducting magnets may rise significantly due to the insufficient supply of liquid helium. The shortage of liquid helium may limit the operation of certain high-tech equipment and experiments, affecting the usability of scientific research and medical equipment. The shortage has also prompted researchers to explore alternative coolants and more efficient techniques for using liquid helium to reduce reliance on liquid helium.
To address the scarcity of liquid helium, the scientific and industrial community is taking some measure that many laboratories and equipment have employed liquid helium recovery systems to reduce waste. Other coolants such as liquid nitrogen, while not a complete replacement for liquid helium, may be helpful in some applications. Scientists are also studying alternative sources of helium, such as extraction of helium-3 from lunar soil, and the like. The scarcity of liquid helium is a complex challenge, but its impact on scientific and industrial applications can be partially mitigated by technological innovation and resource management.
Disclosure of Invention
The invention provides a superconducting magnet cold energy recovery system for overcoming the defects in the prior art, and the consumption of helium is reduced by recovering the liquid helium to cool the cold energy of the superconducting magnet system, so that the purpose of saving helium resources is achieved.
The superconducting magnet cold energy recovery system is characterized in that a cold screen is arranged in the shell, a steel pipe disc is arranged on the outer side of the cold screen, a cold screen tank is arranged in the cold screen, one side of the top of the cold screen tank is connected with a liquid helium inlet, the other side of the top of the cold screen tank is connected with a cooling system outlet, a superconducting coil is arranged in the cold screen tank, and two ends of the superconducting coil are respectively connected with a current lead.
The current wires at two ends of the superconducting coil respectively penetrate through the cold screen tank and the top of the cold screen, and are positioned at the outer side of the shell and connected with an external power supply.
The junction of the current lead and the cold screen is connected through a thermal connecting component, and the junction of the current lead and the shell is connected through a sealing component.
The current lead is a high-temperature superconductive current lead.
The cold screen tank is 4.2K, at least 4 channels are arranged at the top of the cold screen tank, the first channel is connected with the liquid helium inlet, the second channel is connected with the first helium outlet, the third channel is connected with the outlet of the cooling system, current wires are arranged in the second channel and the fourth channel, and the top of the third channel is connected with the middle parts of the second channel and the third channel.
One end of the cooling system outlet is positioned at the outer side of the shell, one end of the cooling system outlet is connected with the first helium inlet, the other end of the cooling system outlet is connected with a third channel of the cold screen tank, a plurality of blocking plates are uniformly distributed in the cooling system outlet, the blocking plates are smooth and reflective in surface, and gaps are formed in the wall surfaces of the blocking plates.
The cooling system comprises a cooling system outlet, a first helium inlet, a second helium inlet, a heat exchange wall and a heat exchange pipe, wherein the heat exchange wall is arranged on a pipeline between the cooling system outlet and the first helium inlet, and one or a combination of a plurality of structures of bulges, corrugated surfaces and fins is arranged on the wall surface of the heat exchange wall.
The steel tube disc is formed by winding 304 stainless steel tubes on the outer side of the cold screen, one end of the steel tube disc is provided with a second helium inlet, the other end of the steel tube disc is provided with a second helium outlet, and the second helium inlet and the second helium outlet are respectively positioned on the outer side of the shell.
The shell is 300K.
The cold screen is 50K.
Compared with the prior art, the invention provides a superconducting magnet cold energy recovery system, which is characterized in that the low-temperature helium inlet of a current lead and the low-temperature helium outlet of a superconducting coil are subjected to heat exchange, so that helium entering the current lead is pre-cooled, and the low-temperature helium cold energy exiting from the superconducting coil is recovered.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention.
FIG. 2 is an enlarged schematic view of the outlet of the cooling system according to the present invention.
Referring to fig. 1, 2,1 is a housing, 2 is a cold shield, 3 is a cold shield tank, 3-1 is a first channel, 3-2 is a second channel, 3-3 is a third channel, 3-4 is a fourth channel, 4 is a superconducting coil, 5 is a current lead, 6 is a first helium gas outlet, 7 is a first helium gas inlet, 8 is a cooling system outlet, 9 is a blocking plate, 10 is a thermal connection assembly, 11 is a sealing assembly, 12 is a liquid helium gas inlet, 13 is a second helium gas inlet, 14 is a second helium gas outlet, and 15 is a steel pipe disk.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1 and 2, a cold screen 2 is arranged in a shell 1, a steel pipe disc 15 is arranged on the outer side of the cold screen 2, a cold screen tank 3 is arranged in the cold screen 2, one side of the top of the cold screen tank 3 is connected with a liquid helium inlet 12, the other side of the top of the cold screen tank 3 is connected with a cooling system outlet 8, a superconducting coil 4 is arranged in the cold screen tank 3, and two ends of the superconducting coil 4 are respectively connected with a current lead 5.
The current wires 5 at the two ends of the superconducting coil 4 respectively penetrate through the tops of the cold shield tank 3 and the cold shield 2, and are positioned at the outer side of the shell 1 and connected with an external power supply.
The junction of the current lead 5 and the cold screen 2 is connected through a thermal connection assembly 10, and the junction of the current lead 5 and the shell 1 is connected through a sealing assembly 11.
The current lead 5 is a high temperature superconductive current lead.
The cold screen tank 3 is 4.2K, at least 4 channels are arranged at the top of the cold screen tank 3, the first channel 3-1 is connected with the liquid helium inlet 12, the second channel 3-2 is connected with the first helium outlet 6, the third channel 3-3 is connected with the cooling system outlet 8, current wires 5 are arranged in the second channel 3-2 and the fourth channel 3-4, and the top of the third channel 3-3 is connected with the middle parts of the second channel 3-2 and the third channel 3-3.
One end of the cooling system outlet 8 is positioned at the outer side of the shell 1, one end of the cooling system outlet 8 is connected with the first helium inlet 7, the other end of the cooling system outlet 8 is connected with the third channel 3-3 of the cold screen tank 3, a plurality of blocking plates 9 are uniformly distributed in the cooling system outlet 8, the blocking plates 9 are smooth and reflective in surface, and gaps are formed in the wall surfaces of the blocking plates 9.
A heat exchange wall is arranged on the pipeline between the cooling system outlet 8 and the first helium gas inlet 7, and one or a combination of a plurality of structures of bulges, corrugated surfaces and fins are arranged on the wall surface of the heat exchange wall.
The steel tube disc 15 is formed by winding 304 stainless steel tubes on the outer side of the cold screen 2, one end of the steel tube disc 15 is provided with a second helium inlet 13, the other end of the steel tube disc 15 is provided with a second helium outlet 14, and the second helium inlet 13 and the second helium outlet 14 are respectively positioned on the outer side of the shell 1.
The housing 1 is 300K.
The cold screen 2 is 50K.
The 50K cold screen cooling system in the Dewar container (namely the shell 1) is formed by winding a 304 stainless steel tube disc 15 on a 50K cold screen 2, and passing low-temperature helium gas into the steel tube disc 15 to cool the 50K cold screen 2.
Liquid helium is poured into the cold shield tank 3 to cool the superconducting coil 4, so that the superconducting coil 4 is cooled to a superconducting state. A plurality of baffle plates 9 are installed in the pipe of the cooling system outlet 8, so that the convection heat exchange and radiation heat exchange of helium gas in the cooling system outlet 8 can be reduced.
The current lead 5 is divided into two sections, and the upper end of the current lead 5 section is outside the dewar (i.e. the shell 1) and is connected with an external power supply. The lower section of the current lead 5 is connected to the cold screen 2 by a thermal connection assembly 10, and the upper section of the current lead 5 is connected to the outer housing 1 by a sealing assembly 11. The current lead 5 is a high-temperature superconducting current lead, and the lower end of the current lead 5 is connected with the superconducting wire of the superconducting coil 4.
The cold energy recovery system is a dewar (i.e. housing 1) in which the superconducting coils 4 cool the cryogenic helium gas at the system outlet 8 in heat exchange relationship with the cooling system inlet (i.e. first helium gas inlet 7) of the current lead 5. The heat exchange wall surface of the pipeline of the cooling system outlet 8 and the cooling system inlet (namely the first helium inlet 7) is provided with a plurality of bulges and corrugated surfaces, so that the aim of enhancing heat exchange is achieved. Thereby achieving the purpose of precooling helium gas at the cooling system inlet (i.e., the first helium gas inlet 7) of the current lead 5, thereby reducing the amount of helium gas used.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411476249.XA CN119296909A (en) | 2024-10-22 | 2024-10-22 | A superconducting magnet cold energy recovery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411476249.XA CN119296909A (en) | 2024-10-22 | 2024-10-22 | A superconducting magnet cold energy recovery system |
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| Publication Number | Publication Date |
|---|---|
| CN119296909A true CN119296909A (en) | 2025-01-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202411476249.XA Pending CN119296909A (en) | 2024-10-22 | 2024-10-22 | A superconducting magnet cold energy recovery system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN120600860A (en) * | 2025-06-09 | 2025-09-05 | 上海交通大学 | A multi-source energy system and energy management method and device thereof |
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- 2024-10-22 CN CN202411476249.XA patent/CN119296909A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN120600860A (en) * | 2025-06-09 | 2025-09-05 | 上海交通大学 | A multi-source energy system and energy management method and device thereof |
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