CN220032141U - Carbon dioxide bubble drag reduction system - Google Patents
Carbon dioxide bubble drag reduction system Download PDFInfo
- Publication number
- CN220032141U CN220032141U CN202320720022.XU CN202320720022U CN220032141U CN 220032141 U CN220032141 U CN 220032141U CN 202320720022 U CN202320720022 U CN 202320720022U CN 220032141 U CN220032141 U CN 220032141U
- Authority
- CN
- China
- Prior art keywords
- carbon dioxide
- drag reduction
- reduction system
- pipeline
- storage tank
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 146
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 73
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 73
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims 1
- 239000007924 injection Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 6
- 239000007789 gas Substances 0.000 description 23
- 239000000446 fuel Substances 0.000 description 7
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
- 229910052799 carbon Inorganic materials 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 239000007788 liquid Substances 0.000 description 4
- 238000009423 ventilation Methods 0.000 description 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 3
- 238000011900 installation process Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T70/00—Maritime or waterways transport
- Y02T70/10—Measures concerning design or construction of watercraft hulls
Abstract
The utility model discloses a carbon dioxide bubble drag reduction system, which comprises an air supply system (8), wherein the air supply system (8) is communicated to a cavity of a gas layer drag reduction system (12) at the bottom of a ship body through a third pipeline (9); the third pipeline (9) is provided with a third valve (10); the utility model also comprises a carbon dioxide storage tank (1), wherein the carbon dioxide storage tank (1) is communicated with the pressure stabilizing cabin (5) through a first pipeline (3); the stabilizator cabin (5) is communicated to the cavity of the gas layer drag reduction system (12) through a second pipeline (6); a first valve (4) is arranged on the first pipeline (3); a second valve (7) is arranged on the second pipeline (6); the second pipeline (6) is also provided with an exhaust branch pipe communicated with the atmosphere and is provided with a fourth valve (11). According to the utility model, the carbon dioxide gas emission is connected with the bubble drag reduction system, and when the pressure of the storage tank reaches the design pressure, the carbon dioxide is directly released into the bubble drag reduction system, so that the effect of releasing the pressure of the storage tank can be achieved.
Description
Technical Field
The utility model relates to a ship drag reduction technology, in particular to a carbon dioxide bubble drag reduction technology.
Background
Currently, world marine propulsion system fuels are mainly fossil fuels, such as heavy oil (HFO) and diesel oil (MGO), and in recent years, low carbon fuels such as LNG, liquid ammonia/methanol have gradually entered the history stage, but these transition fuels are insufficient to achieve at least 50% reduction in emissions in 2050 and strive to achieve 70% of the goal in 2050.
With the increasingly wide application of low-carbon or carbon-free fuels such as natural gas, methanol, ammonia, hydrogen and the like and the rising of carbon reduction measures such as carbon dioxide transportation and the like, the C-type cabin liquefied carbon dioxide gas ship is vigorously developed.
The basic principle of liquefied carbon dioxide transportation is that the three-phase characteristic of carbon dioxide is utilized, the carbon dioxide can keep liquid state at the temperature of-55 ℃ and the pressure of more than 6bar, and the liquefied carbon dioxide has small volume and good fluidity under the state, and is convenient to store and transport. Generally, the carbon dioxide adopts a high-pressure low-temperature storage mode, and the design pressure is up to 19bar and is far away from the triple point pressure in order to ensure the stable phase state.
The problem is that the carbon dioxide storage tank is up to 19bar of design pressure, the length and the width of the storage cabin are limited by strength, high-strength steel exceeding the standard requirement is required to be used, the thickness of the storage cabin is up to about 50mm, the cost is high, the construction is difficult, the maximum limit size of the outer shape of the tank body can only be 50 meters long, the total cabin capacity is about 5000 cubic meters at the maximum, the single cabin loading of liquid carbon dioxide is restricted, and the economy is poor. The weight of the tank body is 2 times of that of the low-pressure C-shaped cabin, and the overall loading and arrangement performance of the ship is affected.
Different design pressures can affect the thickness of the tank and the duration of the pressure. If a low-pressure storage tank is adopted, the storage state is 6bar-10bar, the temperature is near-50 ℃, the chemical state is unstable and can be changed near the three-phase point of the carbon dioxide. Once the pressure is not guaranteed, the liquid carbon dioxide can rapidly vaporize, resulting in leakage of carbon dioxide and even safety problems. There are two solutions to this problem, one is to provide a set of reliquefaction devices, which pressurizes the gas to a liquid state when the pressure in the tank reaches the design pressure; the second approach is to release carbon dioxide to the atmosphere when the tank pressure reaches the design pressure to relieve the pressure in the tank. Neither of these methods can make good use of carbon dioxide, and may even cause a greenhouse effect.
Disclosure of Invention
According to the utility model, the characteristic that carbon dioxide is dissolved in water is utilized, a set of system is provided, carbon dioxide gas is discharged and connected with the bubble drag reduction system, and when the pressure of the storage tank reaches the design pressure, the carbon dioxide is directly released into the bubble drag reduction system, and firstly, the effect of releasing the pressure of the storage tank can be achieved, secondly, the carbon dioxide can be directly discharged from the bubble drag reduction system, and the process that the primary inflation system absorbs air from the atmosphere and compresses the air is omitted. Thirdly, carbon dioxide is released to the bottom of the ship, so that frictional resistance of the bottom of the ship can be effectively reduced, fuel consumption of ship navigation is saved, carbon emission is reduced, and 40% of carbon dioxide emission in the air can be reduced after the carbon dioxide is dissolved in water on the premise that no additional device is added. Fourth, the device can replace the original ventilation mast device, so that the design cost is reduced, and the installation process is reduced. The utility model can transport the carbon dioxide by adopting a low-pressure storage tank (8 bar-10 bar), thereby greatly reducing the plate thickness and the weight of the storage tank, greatly improving the total cabin capacity of single cabin loading and improving the economy of carbon dioxide transportation.
In order to achieve the above object, the present utility model provides a carbon dioxide bubble drag reduction system, comprising an air supply system, wherein the air supply system is communicated to a gas layer drag reduction system cavity at the bottom of a ship body through a third pipeline; the third pipeline is provided with a third valve. The system of the utility model also comprises a carbon dioxide storage tank, wherein the carbon dioxide storage tank is communicated to the stabilizing cabin through a first pipeline; the pressure stabilizing cabin is communicated to the cavity of the gas layer drag reduction system through a second pipeline; a first valve is arranged on the first pipeline; a second valve is arranged on the second pipeline; the second pipeline is also provided with an exhaust branch pipe communicated with the atmosphere and is provided with a fourth valve.
In a preferred mode, the carbon dioxide bubble drag reduction system is characterized in that a pressure measuring instrument is arranged on the carbon dioxide storage tank; the carbon dioxide storage tank 1 is a low-pressure storage tank; the design pressure is 8bar to 10bar. In addition, the first valve, the second valve, the third valve and the fourth valve are all remote control valves.
The cavity of the gas layer drag reduction system is a gas spraying cavity, and is provided with a dot matrix type gas spraying hole which is connected with the gas supply pipeline.
Preferably, the second conduit and the third conduit are connected to a common conduit at the end of the gas layer drag reduction system cavity. In addition, the carbon dioxide storage tank is also connected with a reliquefaction device.
According to the utility model, the characteristic that carbon dioxide is dissolved in water is utilized, a set of system is provided, carbon dioxide gas is discharged and connected with the bubble drag reduction system, and when the pressure of the storage tank reaches the design pressure, the carbon dioxide is directly released into the bubble drag reduction system, so that the effect of releasing the pressure of the storage tank can be achieved. The system of the utility model can at least reduce the use of a primary air supply system, and connect two sets of systems, thereby being more economical. Carbon dioxide is released to the bottom of the ship, so that frictional resistance of the bottom of the ship can be effectively reduced, fuel consumption of ship navigation is saved, carbon emission is reduced on the premise that no additional device is added, and 40% of carbon dioxide emission in the air can be reduced after the carbon dioxide is dissolved in water. The device can replace the original ventilation mast device, reduce the design cost and reduce the installation process. In addition, the application of the utility model can use the carbon dioxide to transport by adopting a low-pressure storage tank (8 bar-10 bar), thereby greatly reducing the plate thickness and the weight of the storage tank, greatly improving the total cabin capacity of single cabin and improving the economy of carbon dioxide transportation.
Drawings
FIG. 1 is a schematic diagram of the principle structure of a carbon dioxide bubble drag reduction system.
Detailed Description
As shown in fig. 1, the carbon dioxide bubble drag reduction system comprises a carbon dioxide storage tank 1, a pressure measuring instrument 2, an air charging pipeline 3 and a pressure stabilizing cabin 5; the carbon dioxide tank 1 adopts a low-pressure storage tank, and the design pressure is 8 bar-10 bar. When the pressure of the pressure measuring instrument 2 reaches 8bar, the first remote control valve 4 is opened, and the gasified carbon dioxide gas reaches the stabilizing chamber 5 along the pipeline 3. The utility model can cancel the ventilation mast structure in the existing design, reduce the design cost and reduce the installation process.
After the pressure of the pressure stabilizing cabin reaches a certain pressure, the second remote control valve 7 is opened, the compressor directly provides carbon dioxide to the gas layer drag reduction system 12 through the pipeline 6, so that the effect of bubble drag reduction is achieved, at the moment, the third remote control valve 10 connected to the gas supply system 8 and the fourth remote control valve 11 connected to the atmosphere are in a closed state, the gas supply system 8 can reduce one-time gas supply use, carbon dioxide is released to the bottom of a ship, the friction resistance of the bottom of the ship can be effectively reduced, on the premise of not adding an additional device, the fuel consumption for ship navigation is saved, the carbon emission is reduced, after the carbon dioxide is dissolved in water, the emission of 40% of carbon dioxide in the air can be reduced, and meanwhile, the effect of reducing the pressure of a storage tank can be achieved.
The air supply system 8 is connected with the bubble drag reduction system 12 through a pipeline 9. When the gas in the pressure stabilizing cabin 5 is insufficient, the second remote control valve 7 is closed, the third remote control valve 10 is opened, and the gas supply system 8 can directly supply gas to the bubble drag reduction system 12, so that the drag reduction function is realized.
When the bubble drag reduction system does not need to work, all valves are closed, and only valve 11 is opened to discharge the redundant gas into the atmosphere.
When the ballast 5 gas is sufficient for use of the bubble drag reduction system, the gas supply system 8 will not be turned on; in one voyage, when the air supply system 8 is opened later than the ballast 5, the carbon dioxide gas can be completely released into the seawater, and the emission of the air is reduced.
According to the novel carbon dioxide bubble drag reduction system, the carbon dioxide ventilation system and the bubble drag reduction air supply system are combined with each other, carbon dioxide release can be considered, the use of the air supply system is reduced, and two things are solved by using one set of system.
The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should be covered by the protection scope of the present utility model by making equivalents and modifications to the technical solution and the inventive concept thereof.
Claims (8)
1. A carbon dioxide bubble drag reduction system comprises an air supply system (8), wherein the air supply system (8) is communicated to a cavity of a gas layer drag reduction system (12) at the bottom of a ship body through a third pipeline (9); the third pipeline (9) is provided with a third valve (10); it is characterized in that the method comprises the steps of,
the device further comprises a carbon dioxide storage tank (1), wherein the carbon dioxide storage tank (1) is communicated with the pressure stabilizing cabin (5) through a first pipeline (3); the pressure stabilizing cabin (5) is communicated to the cavity of the gas layer drag reduction system (12) through a second pipeline (6); a first valve (4) is arranged on the first pipeline (3); a second valve (7) is arranged on the second pipeline (6);
the second pipeline (6) is also provided with an exhaust branch pipe communicated with the atmosphere and is provided with a fourth valve (11).
2. The carbon dioxide bubble drag reduction system according to claim 1, characterized in that the carbon dioxide storage tank (1) is provided with a pressure measuring instrument (2).
3. The carbon dioxide bubble drag reduction system of claim 1, wherein the carbon dioxide storage tank (1) is a low pressure storage tank.
4. A carbon dioxide bubble drag reducing system according to claim 3, characterized in that the carbon dioxide storage tank (1) is designed at a pressure of 8bar to 10bar.
5. The carbon dioxide bubble drag reduction system of claim 1, wherein the first valve, the second valve, the third valve, and the fourth valve are all remote control valves.
6. The carbon dioxide bubble drag reduction system of claim 1, wherein the gas layer drag reduction system (12) cavity is a gas injection cavity.
7. The carbon dioxide bubble drag reduction system of claim 1, wherein the second conduit (6) and the third conduit (9) are a common conduit with the end conduit connected to the gas layer drag reduction system (12) cavity.
8. The carbon dioxide bubble drag reduction system according to claim 1, wherein the carbon dioxide storage tank (1) is further connected to a reliquefaction device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320720022.XU CN220032141U (en) | 2023-04-04 | 2023-04-04 | Carbon dioxide bubble drag reduction system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320720022.XU CN220032141U (en) | 2023-04-04 | 2023-04-04 | Carbon dioxide bubble drag reduction system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220032141U true CN220032141U (en) | 2023-11-17 |
Family
ID=88739962
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320720022.XU Active CN220032141U (en) | 2023-04-04 | 2023-04-04 | Carbon dioxide bubble drag reduction system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220032141U (en) |
-
2023
- 2023-04-04 CN CN202320720022.XU patent/CN220032141U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |