CN2670890Y - High-efficient low-temperature heat transfer element based on natural circulating precooling process - Google Patents
High-efficient low-temperature heat transfer element based on natural circulating precooling process Download PDFInfo
- Publication number
- CN2670890Y CN2670890Y CNU2003201225616U CN200320122561U CN2670890Y CN 2670890 Y CN2670890 Y CN 2670890Y CN U2003201225616 U CNU2003201225616 U CN U2003201225616U CN 200320122561 U CN200320122561 U CN 200320122561U CN 2670890 Y CN2670890 Y CN 2670890Y
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- China
- Prior art keywords
- temperature
- natural circulation
- transfer element
- low
- heat transfer
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- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000007788 liquid Substances 0.000 claims abstract description 44
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 17
- 229910052802 copper Inorganic materials 0.000 claims description 17
- 239000010949 copper Substances 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 9
- 239000010935 stainless steel Substances 0.000 claims description 9
- 229910001220 stainless steel Inorganic materials 0.000 claims description 9
- 229910000838 Al alloy Inorganic materials 0.000 claims description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 4
- 238000005057 refrigeration Methods 0.000 claims description 3
- 238000003860 storage Methods 0.000 claims description 3
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims description 2
- 229910052786 argon Inorganic materials 0.000 claims description 2
- 239000002826 coolant Substances 0.000 claims description 2
- 239000001307 helium Substances 0.000 claims description 2
- 229910052734 helium Inorganic materials 0.000 claims description 2
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims description 2
- 239000001257 hydrogen Substances 0.000 claims description 2
- 229910052739 hydrogen Inorganic materials 0.000 claims description 2
- 125000004435 hydrogen atom Chemical class [H]* 0.000 claims description 2
- 229910052754 neon Inorganic materials 0.000 claims description 2
- GKAOGPIIYCISHV-UHFFFAOYSA-N neon atom Chemical compound [Ne] GKAOGPIIYCISHV-UHFFFAOYSA-N 0.000 claims description 2
- 229910052757 nitrogen Inorganic materials 0.000 claims description 2
- 230000002792 vascular Effects 0.000 claims description 2
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 230000000717 retained effect Effects 0.000 abstract 1
- 239000012530 fluid Substances 0.000 description 8
- 238000001816 cooling Methods 0.000 description 7
- 238000009833 condensation Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000002887 superconductor Substances 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000012809 cooling fluid Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- 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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B23/00—Machines, plants or systems, with a single mode of operation not covered by groups F25B1/00 - F25B21/00, e.g. using selective radiation effect
- F25B23/006—Machines, plants or systems, with a single mode of operation not covered by groups F25B1/00 - F25B21/00, e.g. using selective radiation effect boiling cooling systems
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
Abstract
The utility model discloses a high-efficient low-temperature heat transfer element based on the natural circulating precooling process, comprising a low-temperature liquid storing slot connected with a low-temperature heat pipe and a cool head in turn. The bottom of the low-temperature liquid storing slot is provided with a natural circulating precolling loop and communicated with the top part of the low-temperature liquid storing slot by the cool head. When the natural circulation is stopped or stopped basically, the low-temperature heat pipe can directly transfer the heat radiated by the cooled object to the cool source in high efficiency and in the small temperature difference to make the temperature of the cooled object retained stable. The low-temperature high-efficient heat transfer element based on the natural circulation is characterized in that the utility model integrates the advantages of the natural circulation and the low-temperature heat pipe, learns from others's strong points to offset one's weakness. The temperature of the cooled object can be decreased in short time and simultaneously can ensure the temperature fluctuation of the cooled object smaller. The safety of the cooled object requiring the high temperature stability is increased. The natural circulating process can be stated renewedly when the temperature of the cooled object hoiks. The utility model has the function of the self feedback.
Description
Technical field
The utility model relates to a kind of high efficient cryogenic heat transfer element based on the Natural Circulation precooling process, and this heat transfer element can be used for the lasting fast cooling of object.
Background technology
Along with the development of Cryo Refrigerator, the quick cooling of the object of how realizing being cooled is one of present Cryo Refrigerator key in application problem.Connected mode commonly used at present is to use copper rod that the Cryo Refrigerator and the object that is cooled are coupled together, and owing to the diameter of the restriction copper rod that is subjected to Cryo Refrigerator cold head cross-sectional area is generally less, has limited the transmission of refrigeration machine cold greatly.Experimental results show that the cold that Cryo Heat Tube transmits under identical cross-sectional area is most doubly than copper rod, its feature is to have bigger heat output under condition of small temperature difference.And adopt the method for Natural Circulation cooling can make the cooled object body realize temperature-fall period in a short period of time.
Summary of the invention
The purpose of this utility model provides a kind of high efficient cryogenic heat transfer element based on the Natural Circulation precooling process.
It has cryogenic liquid tank and is connected with Cryo Heat Tube, cold head successively, and the cryogenic liquid tank bottom is provided with the pre-cold loop of Natural Circulation and is connected through cold head to cryogenic liquid tank top.
When independently using the Natural Circulation cooling object, the temperature of object is reduced near the temperature of cooling fluid, after but part temperatures reduces owing to be cooled, the power of Natural Circulation disappears and has lost the ability of further cooling, and because the effect cryogenic liquid of fluid pressure is in supercooled state, when the object that is cooled has heat to distribute, can make ducted cryogenic liquid produce the geyser phenomenon, return line shakes, the temperature of object of being cooled fluctuates easily, and this is disadvantageous for the object that is cooled that requires temperature stabilization.Cryo Heat Tube has under the little temperature difference advantage of big heat output, and after Natural Circulation stopped or stopping substantially, the Cryo Heat Tube heat that object distributes that can will be cooled under the little temperature difference directly was delivered to low-temperature receiver efficiently, makes the temperature of the object that is cooled keep stable.So the characteristics based on the efficient cryogenic cryogenic heat transfer element of Natural Circulation precooling are exactly the advantage of comprehensive natural circulation and Cryo Heat Tube, learn from other's strong points to offset one's weaknesses, both can make the temperature of the object that is cooled reduce in a short period of time, the temperature fluctuation of the object that can guarantee again simultaneously to be cooled is less.Can increase those securities like this for the exigent object that is cooled of temperature stability.Special needs to be pointed out is, the temperature of object takes place sharply to rise (as the superconductor quench) then the Natural Circulation process can restart again in case be cooled, thereby cooling fast make the object that is cooled return to target temperature rapidly, so this heat transfer element has the function of self feed back once more.
Description of drawings
Fig. 1 adopts the component structure schematic diagram of cryogenic liquid working medium as low-temperature receiver and free convection medium;
Fig. 2 is that the employing Cryo Refrigerator is the component structure schematic diagram of free convection medium as low-temperature receiver, cryogenic liquid;
Fig. 3 is the structural representation of cryogenic heat transfer element cold head.
The specific embodiment
Have cryogenic liquid tank 1 and be connected with Cryo Heat Tube 2, cold head 3 successively based on the high efficient cryogenic heat transfer element of Natural Circulation precooling process, the cryogenic liquid tank bottom is provided with the pre-cold loop 5 of Natural Circulation and is connected through cold head to cryogenic liquid tank top, is provided with the object 4 that is cooled on cold head.Cryogenic liquid tank is provided with Cryo Refrigerator 6.
The material of above-mentioned Cryo Heat Tube is stainless steel, copper, aluminium alloy, and it is shaped as circle, rectangle.The material of the pre-cold loop of Natural Circulation is stainless steel, copper, aluminium alloy; The profile of the pre-cold loop of Natural Circulation is circular, square.The cold head material is red copper or oxygen-free copper; The cooling medium storage tank be shaped as cylindrical cavity, rectangular cavity.Cryogenic liquid is: liquid helium, liquid hydrogen, liquid oxygen, liquid nitrogen, liquid neon, liquid argon; Cryo Refrigerator is: vascular refrigerator, sterlin refrigerator, G-M refrigeration machine.
The effect of fluid passage is for fluid provides path, simultaneously the heat of the object that is cooled is passed to fluid.Not only the condensation ability of Cryo Heat Tube can be increased but also the latent heat of vaporization of cryogenic liquid can be directly utilized.Design and making are the temperature that the object that is cooled is cooled to require based on the final goal of the high efficient cryogenic heat transfer element of Natural Circulation precooling process, and keep the stability of temperature, so guiding theory of the present invention is efficient, stable.The cold head material does not have strict restriction, but it accepts preferably have bigger thermal conductivity factor from the heat of the object that is cooled.The fluid passage can directly cut out on cold head with machining process.The effect of the pre-cold loop of Natural Circulation is that the fluid passage on cryogenic tank and the cold head is communicated with, and forms the flow circuits of a cryogenic liquid between them, and forms certain pressure differential between liquid inlet and outlet.The material of the pre-cold loop of Natural Circulation is not strict with, but its internal flow is cryogenic liquid, to leak heat and preferably uses and have less thermal conductivity factor and weld with cold head and liquid storage vessel easily in order to reduce.The kind of low-temperature receiver mainly contains two kinds: a kind of is that directly to utilize cryogenic liquid, another kind be to utilize Cryo Refrigerator.
The copper pipe that example has adopted two Φ 8 * 1mm based on the high efficient cryogenic heat transfer element of Natural Circulation precooling process also can be selected stainless steel and the aluminium alloy material as Cryo Heat Tube for use as the Cryo Heat Tube material.The pre-cold loop of Natural Circulation is the stainless steel tube of Φ 5 * 0.5mm, increases the radially thermal resistance of the pre-cold loop of Natural Circulation.The size of cold head is the red copper piece of 30 * 30 * 25mm.On the cold head upper surface, make a call to four holes that 20mm is dark, two welding copper pipes, two welded stainless steel pipes by the method for machining.One end of copper pipe and stainless steel tube is goed deep into 5mm directly be welded on the cold head, the sealing of the other end of copper pipe forms Cryo Heat Tube, and one of them stainless steel tube directly is welded on the lower shoe of cryogenic liquid tank, and another is welded on the liquid level of cryogenic liquid tank.On the vertical plane of the side of cold head, make a call to the through hole of two 5mm, and mill out two through holes of two 5 * 5mm conduits connections form Natural Circulation with the copper coin sealing fluid passage at heat pipe.
Directly cryogenic liquid is poured in the cryogenic liquid tank during use, because the operation power of Natural Circulation is exactly the pressure differential in the reflux line, so when Natural Circulation is started working, can control Natural Circulation by the outlet pressure that is installed in the valve regulated cryogenic liquid steam on the pre-cold loop of Natural Circulation.Because the condensation segment of Cryo Heat Tube is in cryogenic liquid tank, working medium is by the condensation and begin to transmit the heat that object distributes that is cooled in Cryo Heat Tube of air reservoir pipeline when pouring cryogenic liquid into.When the temperature of the object that is cooled rises suddenly, excessive hot-fluid might make Cryo Heat Tube reach its heat transport limitation and lost efficacy (as the superconductor quench), at this moment Natural Circulation will be restarted work automatically, be rapidly that the object that is cooled reaches near the temperature of job requirement, Cryo Heat Tube also restarts work, realizes the self feed back process of cooling.
Claims (6)
1. high efficient cryogenic heat transfer element based on the Natural Circulation precooling process, it is characterized in that: it has cryogenic liquid tank (1) and is connected with Cryo Heat Tube (2), cold head (3) successively, and the cryogenic liquid tank bottom is provided with the pre-cold loop of Natural Circulation (5) and is connected through cold head to cryogenic liquid tank top.
2. a kind of high efficient cryogenic heat transfer element based on the Natural Circulation precooling process according to claim 1, it is characterized in that: said cryogenic liquid tank is provided with Cryo Refrigerator (6).
3. a kind of high efficient cryogenic heat transfer element based on the Natural Circulation precooling process according to claim 1, it is characterized in that: the material of said Cryo Heat Tube is stainless steel, copper, aluminium alloy, and it is shaped as circle, rectangle.
4. a kind of high efficient cryogenic heat transfer element according to claim 1 based on the Natural Circulation precooling process, it is characterized in that: the material of the pre-cold loop of said Natural Circulation is stainless steel, copper, aluminium alloy; The profile of the pre-cold loop of Natural Circulation is circular, square.
5. a kind of high efficient cryogenic heat transfer element according to claim 1 based on the Natural Circulation precooling, it is characterized in that: said cold head material is red copper or oxygen-free copper; The cooling medium storage tank be shaped as cylindrical cavity, rectangular cavity.
6. a kind of high efficient cryogenic heat transfer element according to claim 1 based on the Natural Circulation precooling process, it is characterized in that: said cryogenic liquid is: liquid helium, liquid hydrogen, liquid oxygen, liquid nitrogen, liquid neon, liquid argon; Cryo Refrigerator is: vascular refrigerator, sterlin refrigerator, G-M refrigeration machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2003201225616U CN2670890Y (en) | 2003-12-15 | 2003-12-15 | High-efficient low-temperature heat transfer element based on natural circulating precooling process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2003201225616U CN2670890Y (en) | 2003-12-15 | 2003-12-15 | High-efficient low-temperature heat transfer element based on natural circulating precooling process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2670890Y true CN2670890Y (en) | 2005-01-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2003201225616U Expired - Fee Related CN2670890Y (en) | 2003-12-15 | 2003-12-15 | High-efficient low-temperature heat transfer element based on natural circulating precooling process |
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| Country | Link |
|---|---|
| CN (1) | CN2670890Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1295474C (en) * | 2003-12-15 | 2007-01-17 | 浙江大学 | High efficiency low temperature heat transfer element based on natural circulation precooling process |
| CN102331105A (en) * | 2011-09-23 | 2012-01-25 | 浙江大学 | Pulse tube refrigerator with precooling pulse tube |
| CN102662419A (en) * | 2012-04-25 | 2012-09-12 | 常熟市虞华真空设备科技有限公司 | Temperature control device of liquid nitrogen cold head |
| CN111524619A (en) * | 2020-06-19 | 2020-08-11 | 中国核动力研究设计院 | Experimental device and method for researching dynamic self-feedback characteristic of natural circulation system |
| CN114562355A (en) * | 2022-03-31 | 2022-05-31 | 陕煤集团神木红柳林矿业有限公司 | Explosion-proof engine exhaust cooling device and temperature control method thereof |
-
2003
- 2003-12-15 CN CNU2003201225616U patent/CN2670890Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1295474C (en) * | 2003-12-15 | 2007-01-17 | 浙江大学 | High efficiency low temperature heat transfer element based on natural circulation precooling process |
| CN102331105A (en) * | 2011-09-23 | 2012-01-25 | 浙江大学 | Pulse tube refrigerator with precooling pulse tube |
| CN102662419A (en) * | 2012-04-25 | 2012-09-12 | 常熟市虞华真空设备科技有限公司 | Temperature control device of liquid nitrogen cold head |
| CN111524619A (en) * | 2020-06-19 | 2020-08-11 | 中国核动力研究设计院 | Experimental device and method for researching dynamic self-feedback characteristic of natural circulation system |
| CN114562355A (en) * | 2022-03-31 | 2022-05-31 | 陕煤集团神木红柳林矿业有限公司 | Explosion-proof engine exhaust cooling device and temperature control method thereof |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |