CN216113358U - Liquid hydrogen cold energy utilization device for liquid hydrogen station system - Google Patents
Liquid hydrogen cold energy utilization device for liquid hydrogen station system Download PDFInfo
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- CN216113358U CN216113358U CN202122867240.XU CN202122867240U CN216113358U CN 216113358 U CN216113358 U CN 216113358U CN 202122867240 U CN202122867240 U CN 202122867240U CN 216113358 U CN216113358 U CN 216113358U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/32—Hydrogen storage
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/45—Hydrogen technologies in production processes
Abstract
The utility model discloses a liquid hydrogen cold energy utilization device for a liquid hydrogen station system, which comprises at least one cold well; one side of the upper part of the cold well is communicated and connected with a nitrogen pipe, and the bottom of the cold well is communicated and connected with a liquid nitrogen pipe; the nitrogen pipe, the cold well and the liquid nitrogen pipe are sequentially connected to form a communicated cavity; the nitrogen pipe is used for flowing in nitrogen, and the liquid nitrogen pipe is used for flowing out condensed liquid nitrogen; and a liquid hydrogen high-pressure pipe for circulating liquid hydrogen is arranged in the cold well in a penetrating and communicating manner. On the basis of the prior art, the generated redundant gas nitrogen is condensed again by the liquid hydrogen pipeline and discharged into the liquid nitrogen condensation pipe of the liquid hydrogen storage tank, so that the liquid nitrogen and the nitrogen gas are recycled, the liquid nitrogen temperature of the liquid nitrogen coil pipe of the liquid hydrogen storage tank is reduced, the heat transfer temperature difference of the inner tank and the outer tank of the liquid hydrogen storage tank is reduced, and the evaporation rate of the liquid hydrogen storage tank is further reduced.
Description
Technical Field
The utility model relates to the field of liquid hydrogen storage and transportation, in particular to a liquid hydrogen cold energy utilization device for a liquid hydrogen station system.
Background
Hydrogen is a recognized clean energy source. Compared with gas hydrogen, liquid hydrogen has the characteristics of large mass density per unit volume, low storage pressure, safe storage and transportation, economic storage and transportation and the like.
With the rapid development of hydrogen-fueled automobiles, the demand for hydrogen in the market will also increase rapidly. The traditional high-pressure hydrogen storage and transportation technology for the hydrogen fuel automobile has the problems of low storage and transportation efficiency, high transportation cost, safety in the high-pressure storage and transportation process and the like, and the problems restrict the further development of the high-pressure hydrogen storage and transportation equipment technology and also restrict the development of an automobile hydrogenation station to a certain extent. By adopting liquid hydrogen storage and transportation equipment, the problems of low storage and transportation efficiency, high transportation cost and the like in high-pressure hydrogen storage and transportation can be effectively solved. The key technology of liquid hydrogen storage and transportation equipment is how to reduce the evaporation rate of a storage tank (including a storage tank, a tank car and a tank box, the same is the following), wherein one of factors influencing the evaporation rate is the heat transfer temperature difference between the inner tank and the outer tank of the storage tank, and the smaller the heat transfer temperature difference between the inner tank and the outer tank of the storage tank is, the smaller the evaporation rate of the storage tank is.
The device comprises a liquid hydrogen storage tank, a liquid nitrogen storage tank and an instrument gas, wherein the liquid hydrogen storage tank comprises a liquid hydrogen storage tank inner tank and a liquid hydrogen storage tank outer tank, a high-vacuum multilayer heat insulation layer is arranged between the liquid hydrogen storage tank inner tank and the liquid hydrogen storage tank outer tank, the liquid nitrogen storage tank is connected with the instrument gas through a liquid nitrogen liquid discharge pipe, a liquid nitrogen discharge pipe is wound around the outer side wall of the liquid hydrogen storage tank outer tank from top to bottom, two ends of the liquid nitrogen discharge pipe are respectively connected with the instrument gas and the liquid nitrogen liquid discharge pipe, and the liquid nitrogen enters the liquid nitrogen liquid discharge pipe from the liquid nitrogen storage tank and flows into the instrument gas through the liquid nitrogen discharge pipe; the temperature of the liquid nitrogen in the liquid nitrogen calandria is below-150 ℃. This patent can effectual reduction liquid hydrogen storage tank's the heat transfer difference in temperature, reaches the effect that reduces the natural evaporation rate of liquid hydrogen storage tank. However, how to further reduce the heat transfer temperature difference between the inner tank and the outer tank of the liquid hydrogen storage tank and reduce the liquid nitrogen loss on the basis of the patent to achieve better reduction of the evaporation rate of the liquid hydrogen storage tank is a problem to be solved urgently.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem of how to further reduce the temperature of liquid nitrogen by using cold energy released by liquid hydrogen so as to avoid or reduce the loss of the liquid nitrogen, and aims to provide a liquid hydrogen cold energy utilization device for a liquid hydrogen gas station system, so that the problems are solved.
The utility model is realized by the following technical scheme:
a liquid hydrogen cold energy utilization device for a liquid hydrogen gas station system comprises at least one cold well; one side of the upper part of the cold well is communicated and connected with a nitrogen pipe, and the bottom of the cold well is communicated and connected with a liquid nitrogen pipe; the nitrogen pipe, the cold well and the liquid nitrogen pipe are sequentially connected to form a communicated cavity; the nitrogen pipe is used for flowing in nitrogen, and the liquid nitrogen pipe is used for flowing out condensed liquid nitrogen; and a liquid hydrogen high-pressure pipe for circulating liquid hydrogen is arranged in the cold well in a penetrating and communicating manner.
Further, the cold well comprises a cold well body, a cold well top surface and a cold well bottom surface; the top surface of the cold well is connected with the top end of the well body of the cold well in a sealing manner, and the bottom surface of the cold well is connected with the bottom end of the well body of the cold well in a sealing manner.
Further, the cold well comprises at least one liquid hydrogen high-pressure pipe, and the liquid hydrogen high-pressure pipe penetrates through the top surface and the bottom surface of the cold well and is sealed at a contact surface; the medium circulating in the cold well jacket is nitrogen and condensed liquid nitrogen.
Furthermore, the liquid hydrogen high-pressure pipe is used as a cold source, a plurality of low-temperature-resistant fins are sleeved on part of the outer wall in the cold well, and the low-temperature-resistant fins are used for increasing the cold transfer area.
Further, the low-temperature-resistant fin is made of any one or two of low-temperature-resistant aluminum alloy, low-temperature-resistant copper alloy and low-temperature-resistant stainless steel.
Further, the shape of the low temperature resistant fin is a circular ring or a spiral.
Further, the cold well body comprises a cold well pipe and a corrugated pipe, and the cold well pipe and the corrugated pipe are connected in a communication mode.
Furthermore, cold insulation layers are arranged on the outer sides of the cold well body, the nitrogen pipe and the liquid nitrogen pipe.
Further, a nitrogen heater is arranged on the nitrogen pipe. The nitrogen heater can heat low-temperature nitrogen and then supply station sweeping gas and instrument gas for use.
Further, a second temperature transmitter is arranged on the liquid nitrogen pipe.
When the device is used, one end of the air inlet pipe of the nitrogen pipe is connected with one end of the air outlet pipe of the liquid nitrogen calandria in the device, which is the device with the patent number of CN110043791A and the patent name of the device for reducing the evaporation rate of the liquid hydrogen storage tank by utilizing the cold energy of the liquid nitrogen, the nitrogen discharged by the liquid nitrogen calandria of the device enters the cold well through the air inlet pipe of the nitrogen pipe and the nitrogen pipe of the utility model and is condensed into liquid nitrogen, the liquid nitrogen is gathered at the bottom of the cold well and then discharged through the liquid nitrogen pipe, and one end of the liquid outlet pipe of the liquid nitrogen pipe is connected with one end of the air inlet pipe of the liquid nitrogen calandria of the patent, so that the aim of recycling is fulfilled. By the method, on one hand, liquid nitrogen loss can be avoided or reduced, on the other hand, the temperature of liquid nitrogen in the cooling coil (namely a liquid nitrogen calandria) in the patent No. CN110043791A can be further reduced, and further the heat transfer temperature difference of the inner tank and the outer tank of the liquid hydrogen storage tank in the patent No. CN110043791A is reduced, and the evaporation rate of the liquid hydrogen storage tank is reduced.
Compared with the prior art, the utility model has the following advantages and beneficial effects:
1. the liquid hydrogen cold energy utilization device for the liquid hydrogen gas station system provided by the utility model utilizes the cold energy released by liquid hydrogen to reduce the temperature of liquid nitrogen, effectively avoids or reduces the loss of the liquid nitrogen, and realizes the comprehensive utilization of energy.
2. The liquid hydrogen cold energy utilization device for the liquid hydrogen filling station system provided by the utility model has the advantages that the generated redundant liquid nitrogen is condensed again by the liquid hydrogen pipeline and is discharged into the liquid nitrogen condensation pipe of the liquid hydrogen storage tank, so that the liquid nitrogen and the nitrogen are recycled, and the evaporation rate of the liquid hydrogen storage tank is further reduced.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the utility model and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the utility model and together with the description serve to explain the principles of the utility model. In the drawings:
FIG. 1 is a schematic view showing the connection relationship between a liquid hydrogen high-pressure pipe, a nitrogen gas pipe and a liquid nitrogen pipe and a cold well according to the present invention;
FIG. 2 is a schematic diagram of a cold well structure according to the present invention;
fig. 3 is a schematic diagram of the application scenario connection of the present invention.
Reference numbers and corresponding part names in the drawings:
the system comprises a 1-liquid hydrogen high-pressure pipe, a 2-nitrogen pipe, a 3-cold well body, a 4-first fixed ring, a 5-first temperature transmitter, a 6-nitrogen heater, a 7-cold well shell cold insulation layer, an 8-second fixed ring, a 9-low temperature pipe cold insulation layer, a 10-second temperature transmitter, an 11-fin, a 13-liquid nitrogen pipe, a 31-cold well shell and a 32-corrugated pipe.
Detailed Description
In order to reduce the consumption of system liquid nitrogen, further reduce the evaporation rate of a liquid hydrogen storage tank, realize comprehensive utilization of energy and improve the operating benefits of a liquid hydrogen gas station, the utility model recondenses the generated redundant gas nitrogen by a liquid hydrogen pipeline and discharges the condensed gas nitrogen into a liquid nitrogen condensation pipe of the liquid hydrogen storage tank on the basis of the patent with the patent number of CN110043791A and the patent name of 'a device and a method for reducing the evaporation rate of the liquid hydrogen storage tank by using liquid nitrogen cold energy', thereby recycling the liquid nitrogen and the nitrogen, simultaneously reducing the liquid nitrogen temperature of a liquid hydrogen coil pipe of the liquid hydrogen storage tank, further reducing the heat transfer temperature difference of an inner tank and an outer tank of the liquid hydrogen storage tank and further reducing the evaporation rate of the liquid hydrogen storage tank.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
Example 1
The embodiment 1 provides a liquid hydrogen cold energy utilization device for a liquid hydrogen gas station system, which includes a cold well, as shown in fig. 1, the cold well includes a cold well body 3, a cold well top surface, and a cold well bottom surface; the top surface of the cold well is hermetically connected with the top end of the cold well body 3, and the bottom surface of the cold well is hermetically connected with the bottom end of the cold well body 3; one side of the upper part of the cold well is communicated and connected with a nitrogen pipe 2, and the bottom of the cold well is communicated and connected with a liquid nitrogen pipe 13; the nitrogen pipe 2, the cold well and the liquid nitrogen pipe 13 are sequentially connected to form a communicated cavity; the nitrogen pipe 2 is used for inflow of nitrogen, and the liquid nitrogen pipe 13 is used for outflow of liquid nitrogen after condensation of nitrogen; and a liquid hydrogen high-pressure pipe 1 for circulating liquid hydrogen is arranged in the cold well in a penetrating and communicating manner. In the embodiment, the temperature of the liquid nitrogen in the liquid nitrogen pipe 13 is above-205 ℃, so that the liquid nitrogen is prevented from being solidified, and the sealing performance of the cold well is good.
As shown in fig. 2, the cold well wellbore 3 in the present embodiment 1 includes a cold well pipe 31 and a corrugated pipe 32, and the cold well pipe 31 and the corrugated pipe 32 are connected in communication. The corrugated pipe 32 can effectively prevent the cold well pipe 31 in the cold well device from being shrunk due to temperature difference stress in the cooling process to pull the pipe to be cracked.
As shown in fig. 1, fins are sleeved on the outer wall of the part of the liquid hydrogen high-pressure pipe 1 located in the cold well; and a cold well shell cold insulation layer 7 is wrapped on the outer side of the cold well body 3. And the parts of the nitrogen pipe 2, the liquid nitrogen pipe 13 and the liquid hydrogen high-pressure pipe 1, which are positioned outside the cold well, are all wrapped by a low-temperature pipeline cold insulation layer 9. And a second temperature transmitter 10 is arranged on the liquid nitrogen pipe 13. The one end that the well body 3 of cold well was kept away from to nitrogen gas pipe 2 still communicates and is connected with nitrogen gas intake pipe 21 and nitrogen gas pipe outlet duct 22, be provided with nitrogen gas heater 6 on the nitrogen gas pipe outlet duct 22. The well body 3 of the cold well in the embodiment is cylindrical; the position that cold well shaft 3 is located the cold well top surface is provided with first fixed ring 4, the position that cold well shaft 3 is located the cold well bottom surface is provided with the fixed ring 8 of second.
The utility model relates to a device and a method for reducing the evaporation rate of a liquid hydrogen storage tank by using liquid nitrogen cold energy, which is applied by the company under the patent number of CN 110043791A. The boiling point (liquefaction) temperatures of liquid hydrogen and liquid nitrogen are-253 ℃ and-196 ℃ respectively at normal pressure, and the liquefaction temperature difference of the two temperatures is as high as 57 ℃. This patent technique adopts the liquid nitrogen calandria to make the liquid nitrogen circulate on liquid hydrogen storage tank outer wall, utilizes the lower temperature of liquid nitrogen to reduce the temperature of liquid hydrogen storage tank outer wall, and then reduces the difference in temperature of liquid hydrogen storage tank outer wall and liquid hydrogen storage tank inner wall, and then reduces the heat transfer capacity, reduces the rate of increasing hair.
As shown in fig. 1 and 3, one end of the inlet of the nitrogen inlet pipe 21 of the present invention is connected to one end of the outlet of the liquid nitrogen calandria in the device with patent number CN110043791A entitled "a device and method for reducing the evaporation rate of a liquid hydrogen storage tank by using the cold energy of liquid nitrogen", the nitrogen discharged from the liquid nitrogen calandria of the present invention enters the cold well through the nitrogen inlet pipe 21 and the nitrogen pipe 2 of the present invention and is condensed into liquid nitrogen, the liquid nitrogen is collected at the bottom of the cold well and then discharged through the liquid nitrogen pipe 13, and one end of the liquid nitrogen pipe 13 is connected to one end of the inlet of the liquid nitrogen calandria of the present invention, thereby achieving the purpose of recycling.
By the method, on one hand, liquid nitrogen loss can be avoided or reduced, on the other hand, the temperature of liquid nitrogen in the cooling coil (namely a liquid nitrogen calandria) in the patent No. CN110043791A can be further reduced, and further the heat transfer temperature difference of the inner tank and the outer tank of the liquid hydrogen storage tank in the patent No. CN110043791A is reduced, and the evaporation rate of the liquid hydrogen storage tank is reduced.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A liquid hydrogen cold energy utilization device for a liquid hydrogen gas station system is characterized by comprising at least one cold well; one side of the upper part of the cold well is communicated and connected with a nitrogen pipe (2), and the bottom of the cold well is communicated and connected with a liquid nitrogen pipe (13); the nitrogen pipe (2), the cold well and the liquid nitrogen pipe (13) are sequentially connected to form a communicated cavity; the nitrogen pipe (2) is used for flowing in nitrogen, and the liquid nitrogen pipe (13) is used for flowing out condensed liquid nitrogen; and a liquid hydrogen high-pressure pipe (1) for circulating liquid hydrogen is arranged in the cold well in a penetrating and communicating manner.
2. The liquid hydrogen cold energy utilization device for the liquid hydrogen gas station system according to claim 1, wherein the cold well comprises a cold well shaft (3), a cold well top surface and a cold well bottom surface; the top surface of the cold well is connected with the top end of the cold well body (3) in a sealing manner, and the bottom surface of the cold well is connected with the bottom end of the cold well body (3) in a sealing manner.
3. The liquid hydrogen cold energy utilization device for the liquid hydrogen gas station system according to claim 2, characterized in that the cold well comprises at least one liquid hydrogen high pressure pipe (1), and the liquid hydrogen high pressure pipe (1) passes through the top surface and the bottom surface of the cold well and is sealed at the contact surface.
4. The liquid hydrogen cold energy utilization device for the liquid hydrogen gas station system according to claim 3, wherein the liquid hydrogen high-pressure pipe (1) is used as a cold source, and a part of the outer wall in the cold well is sleeved with a plurality of low temperature resistant fins for increasing the cold transfer area.
5. The liquid hydrogen cold energy utilization device for the liquid hydrogen filling station system according to claim 4, wherein the low temperature resistant fins are made of any one or two of low temperature resistant aluminum alloy, low temperature resistant copper alloy or low temperature resistant stainless steel.
6. The liquid hydrogen cold energy utilization device for the liquid hydrogen gas station system according to claim 5, wherein the shape of the low temperature resistant fin is a circular ring or a spiral.
7. A liquid hydrogen cold energy utilization device for a liquid hydrogen filling station system according to claim 1, characterized in that the cold well shaft (3) comprises a cold well pipe (31) and a corrugated pipe (32), and the cold well pipe (31) and the corrugated pipe (32) are connected in communication.
8. The liquid hydrogen cold energy utilization device for the liquid hydrogen filling station system according to claim 2, wherein the cold well shaft (3), the nitrogen gas pipe (2) and the liquid nitrogen pipe (13) are provided with cold insulation layers on the outer sides.
9. The liquid hydrogen cold energy utilization device for the liquid hydrogen filling station system according to claim 1, wherein a nitrogen gas heater (6) is arranged on the nitrogen gas pipe (2).
10. The liquid hydrogen cold energy utilization device for the liquid hydrogen gas station system according to claim 1, characterized in that a second temperature transmitter (10) is arranged on the liquid nitrogen pipe (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122867240.XU CN216113358U (en) | 2021-11-22 | 2021-11-22 | Liquid hydrogen cold energy utilization device for liquid hydrogen station system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122867240.XU CN216113358U (en) | 2021-11-22 | 2021-11-22 | Liquid hydrogen cold energy utilization device for liquid hydrogen station system |
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| Publication Number | Publication Date |
|---|---|
| CN216113358U true CN216113358U (en) | 2022-03-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202122867240.XU Active CN216113358U (en) | 2021-11-22 | 2021-11-22 | Liquid hydrogen cold energy utilization device for liquid hydrogen station system |
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2021
- 2021-11-22 CN CN202122867240.XU patent/CN216113358U/en active Active
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