CN210602389U - Air source power super-cooling liquid nitrogen circulating system - Google Patents
Air source power super-cooling liquid nitrogen circulating system Download PDFInfo
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- CN210602389U CN210602389U CN201921471194.8U CN201921471194U CN210602389U CN 210602389 U CN210602389 U CN 210602389U CN 201921471194 U CN201921471194 U CN 201921471194U CN 210602389 U CN210602389 U CN 210602389U
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Abstract
The utility model relates to an air supply power subcooling liquid nitrogen circulating system, include: the system comprises a heat load, a liquid nitrogen Dewar, a refrigerator, a liquid storage Dewar, a liquid return Dewar, a compressed nitrogen gas source, a matched pipeline and a valve; the heat load is a superconducting magnet or other device needing to provide super-cooled liquid nitrogen; the liquid nitrogen Dewar is arranged in an elevated mode, most of liquid nitrogen in the storage system is matched with the liquid storage Dewar, and flowing power of the liquid nitrogen from the liquid nitrogen Dewar to the liquid return Dewar is provided by utilizing liquid level difference; the refrigerator provides a cold source for the system; a compressed nitrogen gas source provides liquid nitrogen flowing power from a liquid return Dewar to a liquid nitrogen Dewar; the system has the advantages that: the gravity and the pressure provided by the compressed nitrogen are used for replacing conveying equipment such as a low-temperature liquid nitrogen pump or a fan and the like as the power for circulating the system liquid nitrogen, the purchase and maintenance cost of the conveying equipment such as the low-temperature liquid nitrogen pump or the fan and the condition limitation of the liquid nitrogen pump in the use process are avoided, and the energy consumption and the liquid nitrogen loss are reduced.
Description
Technical Field
The utility model relates to a liquid nitrogen circulation low temperature system especially relates to an air supply power subcooling liquid nitrogen circulation system.
Background
The high-temperature superconducting material has the advantages that the resistance disappears in a liquid nitrogen temperature region and enters a superconducting state, and the transmission cable manufactured by utilizing the characteristics can almost realize lossless transmission. The cooling system is the key to realize superconduction, and a common liquid nitrogen circulating system mostly utilizes a low-temperature liquid nitrogen pump or a low-temperature fan to provide power for system circulation. However, the low-temperature liquid nitrogen pump and the low-temperature fan generally have the following defects: purchase, maintenance cost are high, and installation and debugging are complicated, and to the not high shortcoming of tolerance of impurity in the system, use and design condition are often limited:
1. mature and reliable low-temperature liquid nitrogen pumps and low-temperature fans have high purchase cost, complex maintenance and great investment in manpower and financial resources.
2. The installation and debugging of the low-temperature liquid nitrogen pump and the low-temperature fan are complex, and the heat insulation design often needs additional equipment such as a cold box.
3. The low-temperature liquid nitrogen pump and the low-temperature fan have low tolerance on impurities in the system pipeline, the dynamic seal at the rotating shaft is complex, the reliability is poor, and the use scene is often limited.
Therefore, a liquid nitrogen circulating system for conveying fluid by moving equipment is not needed, if a compressed air source is used for replacing a low-temperature liquid nitrogen pump, the purchasing and maintenance cost and the use defects of the low-temperature liquid nitrogen pump or a low-temperature fan can be avoided, the operation energy consumption and the liquid nitrogen loss are saved, and the urgent requirements of the market and scientific research are met.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the not enough of current low temperature liquid nitrogen pump and low temperature fan, provide one kind and utilize compressed air source, provide the liquid nitrogen circulation system of liquid nitrogen circulation power.
The method comprises the following steps: an air source power subcooled liquid nitrogen circulating system, comprising: the system comprises a heat load, a liquid nitrogen Dewar, a refrigerator, a liquid storage Dewar, a liquid return Dewar, a compressed nitrogen gas source, a matched pipeline and a valve;
the liquid nitrogen Dewar outlet is connected with the heat load, and the inlet is connected with the refrigerator; the liquid storage dewar and the liquid return dewar are sequentially connected between the heat load and the refrigerating machine, so that a complete liquid nitrogen circulation loop is formed;
the liquid storage dewar, the liquid return dewar top gas phase and the liquid nitrogen dewar top gas phase are connected through pipelines, and the liquid return dewar top gas phase is connected with a compressed nitrogen gas source.
Preferably, the liquid nitrogen dewar of the gas source power super-cooling liquid nitrogen circulating system is elevated, the liquid storage dewar and the liquid return dewar are arranged on the ground, the heat load is arranged between the liquid nitrogen dewar and the liquid storage dewar, and the height difference is utilized to provide the power for the liquid nitrogen to flow from the liquid nitrogen dewar to the liquid storage dewar through the heat load.
Preferably, the liquid storage dewar and the liquid return dewar of the gas source power super-cooling liquid nitrogen circulating system are arranged on the same horizontal plane, and the bottoms of the liquid storage dewar and the liquid return dewar are communicated through a pipeline.
Preferably, the gas spaces at the tops of the liquid storage dewar and the liquid return dewar of the gas source power super-cooling liquid nitrogen circulating system are communicated with the gas space at the top of the liquid nitrogen dewar.
Preferably, the liquid nitrogen dewar of the gas source power super-cooling liquid nitrogen circulating system is provided with a pressure sensor and an automatic exhaust valve.
Preferably, the matching pipelines and valves of the gas source power subcooled liquid nitrogen circulating system adopt heat insulation equipment.
A gas-pressure driven liquid nitrogen circulation system comprising: the system comprises a heat load, a liquid nitrogen Dewar, a refrigerator, a liquid storage Dewar, a liquid return Dewar, a compressed nitrogen gas source, a matched pipeline and a valve. The liquid nitrogen Dewar, the heat load, the liquid storage Dewar, the liquid return Dewar, the refrigerator and the liquid nitrogen Dewar are sequentially connected by pipelines to form a finished liquid nitrogen circulation loop. Further, the liquid nitrogen dewar and the liquid storage dewar are communicated with the liquid return dewar in gas phase, and the top of the liquid return dewar in gas phase is connected with a high-pressure nitrogen gas source. The liquid nitrogen dewar is elevated and is the main storage equipment of liquid nitrogen in the system, the inlet of the liquid nitrogen dewar is connected with the outlet of the refrigerator, the outlet of the liquid nitrogen dewar is connected with the heat load, and the top gas phase is connected with the liquid storage dewar and the liquid return dewar. The liquid nitrogen Dewar is respectively provided with a temperature sensor and a pressure sensor, and is also provided with an exhaust valve. The liquid storage dewar and the liquid return dewar are arranged on the ground, and an inlet and an outlet of the liquid storage dewar are respectively connected with the heat load outlet and the liquid return dewar outlet. The liquid storage Dewar is communicated with the liquid return Dewar at the bottom, and the top gas phase is communicated with the liquid nitrogen Dewar. And the refrigerating machine is positioned between the liquid return dewar and the liquid nitrogen dewar and is used for cooling the liquid nitrogen flowing through the refrigerating machine.
The obvious advantage of adopting this patent technical scheme is:
compressed nitrogen is used to replace a traditional low-temperature liquid nitrogen pump or a low-temperature fan, so that the purchase, maintenance and repair costs of equipment are avoided, and a plurality of limiting conditions in the use process are avoided. Compressed nitrogen is used, and the pressure of an air source input into the system can be flexibly adjusted according to needs so as to adapt to flexible and changeable use requirements.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a schematic flow diagram of a liquid nitrogen circulation system driven by air pressure according to the present invention.
Detailed Description
The present invention will be described in further detail with reference to the following examples, which are illustrative of the present invention and are not intended to limit the present invention.
Example (b):
as shown in fig. 1, an air source power super-cooling liquid nitrogen circulating system comprises a heat load (1), a liquid nitrogen dewar (2), a refrigerator (3), a liquid storage dewar (4), a liquid return dewar (5), a compressed nitrogen air source (6), a matched pipeline and a valve; the liquid nitrogen Dewar (2) is placed in an elevated mode, the liquid storage Dewar (4) and the liquid return Dewar (5) are placed on the ground, the heat load (1) is arranged between the liquid nitrogen Dewar (2) and the liquid storage Dewar (4), and the liquid level difference is utilized to provide power for flowing of liquid nitrogen. When the device normally operates, the valves V101, V102, V103 and V104 are opened, and liquid nitrogen flows through the heat load (1) and the liquid storage Dewar (4) from the liquid nitrogen Dewar (2) in sequence under the action of gravity and then enters the liquid return Dewar (5); the top of the liquid return dewar (5) is connected with a compressed nitrogen gas source in a gas phase mode, the outlet of the liquid return dewar is connected with the refrigerator (3), when the liquid levels in the liquid storage dewar (4) and the liquid return dewar (5) reach a certain set value, the bottom valve V104 is closed, the valve V207 is opened, and compressed nitrogen is introduced. Under the action of pressure, liquid nitrogen in the liquid return Dewar (5) enters the liquid nitrogen Dewar (2) again after passing through the refrigerator (3). The liquid nitrogen Dewar (2) is communicated with the liquid storage Dewar (4) and the liquid return Dewar (5) in a gas phase manner. After one operation of conveying the liquid nitrogen in the liquid return dewar (5) to the liquid nitrogen dewar (2) by using a compressed gas source is completed, closing the V207, cutting off the compressed gas source, opening the V205 and the V206, and rebalancing the pressures of the three dewars. The liquid nitrogen Dewar (1) is provided with a pressure sensor and an exhaust valve, so that the system operation pressure can be manually set, and the overpressure can be automatically released, thereby ensuring the safe operation of the system.
The matching pipelines and valves are in vacuum heat insulation or other heat insulation modes, so that heat leakage of the system is reduced, and the operation efficiency of the system is improved.
In addition, it should be noted that the specific embodiments described in the present specification may differ in the shape of the components, the names of the components, and the like. All equivalent or simple changes made according to the structure, characteristics and principle of the utility model are included in the protection scope of the utility model. Various modifications, additions and substitutions may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.
Claims (6)
1. An air supply power supercooling liquid nitrogen circulating system is characterized in that: the gas source power supercooling liquid nitrogen circulating system comprises: the system comprises a heat load (1), a liquid nitrogen dewar (2), a refrigerator (3), a liquid storage dewar (4), a liquid return dewar (5), a compressed nitrogen gas source (6) and matched pipelines and valves;
the outlet of the liquid nitrogen Dewar (2) is connected with the heat load (1), and the inlet of the liquid nitrogen Dewar is connected with the refrigerator (3); two dewars of the liquid storage dewar (4) and the liquid return dewar (5) are sequentially connected between the heat load (1) and the refrigerating machine (3), so that a complete liquid nitrogen circulation loop is formed;
the liquid storage dewar (4), the liquid return dewar (5) top gas phase and the liquid nitrogen dewar (2) top gas phase are connected through pipelines, and the liquid return dewar (5) top gas phase is connected with a compressed nitrogen gas source (6).
2. An air source powered subcooled liquid nitrogen circulating system according to claim 1, wherein: the liquid nitrogen Dewar is characterized in that the liquid nitrogen Dewar (2) is arranged in an elevated mode, the liquid storage Dewar (4) and the liquid return Dewar (5) are arranged on the ground, the heat load (1) is arranged between the liquid nitrogen Dewar (2) and the liquid storage Dewar (4), and the power for flowing the liquid nitrogen from the liquid nitrogen Dewar (2) to the liquid storage Dewar (4) through the heat load (1) is provided by utilizing the height difference.
3. An air source powered subcooled liquid nitrogen circulating system according to claim 1, wherein: the liquid storage Dewar (4) and the liquid return Dewar (5) are arranged on the same horizontal plane, and the bottoms of the liquid storage Dewar and the liquid return Dewar are communicated through a pipeline.
4. An air source powered subcooled liquid nitrogen circulating system according to claim 1, wherein: and the gas spaces at the tops of the liquid storage dewar (4) and the liquid return dewar (5) are communicated with the gas space at the top of the liquid nitrogen dewar (2).
5. An air source powered subcooled liquid nitrogen circulating system according to claim 1, wherein: the liquid nitrogen Dewar (2) is provided with a pressure sensor and an automatic exhaust valve.
6. An air source powered subcooled liquid nitrogen circulating system according to claim 1, wherein: and the matching pipeline and the valve (7) both adopt heat insulation equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921471194.8U CN210602389U (en) | 2019-09-05 | 2019-09-05 | Air source power super-cooling liquid nitrogen circulating system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921471194.8U CN210602389U (en) | 2019-09-05 | 2019-09-05 | Air source power super-cooling liquid nitrogen circulating system |
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| CN210602389U true CN210602389U (en) | 2020-05-22 |
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| CN201921471194.8U Active CN210602389U (en) | 2019-09-05 | 2019-09-05 | Air source power super-cooling liquid nitrogen circulating system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112542270A (en) * | 2020-12-10 | 2021-03-23 | 深圳供电局有限公司 | Refrigerating device |
| CN112542271A (en) * | 2020-12-10 | 2021-03-23 | 深圳供电局有限公司 | Liquid nitrogen cooling circulation system |
-
2019
- 2019-09-05 CN CN201921471194.8U patent/CN210602389U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112542270A (en) * | 2020-12-10 | 2021-03-23 | 深圳供电局有限公司 | Refrigerating device |
| CN112542271A (en) * | 2020-12-10 | 2021-03-23 | 深圳供电局有限公司 | Liquid nitrogen cooling circulation system |
| CN112542270B (en) * | 2020-12-10 | 2022-08-16 | 深圳供电局有限公司 | Refrigerating device |
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