A recyclable hydrogen airship and its use method

Abstract

The present invention discloses a recoverable hydrogen airship and a method for using the same. The airship comprises a main airbag 1, which is filled with hydrogen. A hydrogen buffer module and a hydrogen storage module are capable of regulating the pressure in the main airbag 1. The technical solution of the present invention reasonably utilizes the characteristics of hydrogen to achieve safe gas regulation during the process of lifting and staying in the air. During the recovery of the airship, the state of the gas is regulated by a control system so that the airship can return to the ground safely.

Description

Technical Field

[0001] The invention belongs to the technical field of airship design, and in particular relates to a recoverable hydrogen airship and a use method thereof. Background Art

[0002] An airship is a lighter-than-air aircraft. The hull is filled with a buoyant gas with a density lower than that of air to generate buoyancy, and the flight is controlled by a propulsion device. Compared with heavier-than-air aircraft, airships have a longer airborne time. Currently, most airships in the world use helium as the buoyancy gas because helium has high safety and buoyancy efficiency, but helium is a non-renewable energy source and is expensive.

[0003] In order to reduce the technical cost of airship development, using hydrogen as the buoyancy gas can not only save a lot of costs, but also the buoyancy efficiency of hydrogen is higher than that of helium. However, the safety of hydrogen is undoubtedly the premise for the good development of hydrogen airship.

[0004] In addition, when hydrogen is used as the buoyancy gas, if the airship can be safely recovered, it will further improve the utilization rate of hydrogen and the reuse of accessories such as the power propulsion system and onboard equipment in the airship, which has great potential application value.

[0005] At present, the patents related to hydrogen airship solutions mainly focus on the gas regulation of hydrogen and hydrogen power (CN104943845A) or the control measures or layout taken to prevent the simple leakage of hydrogen (CN113060271A). However, the influence of external environment such as static electricity on hydrogen airbags and the influence of gas mixing (hydrogen mixed with air / water vapor and other gases) on subsequent gas regulation due to impure gas are not considered. Therefore, it is necessary to improve the existing technology. Summary of the invention

[0006] Purpose of the Invention

[0007] In view of the above-mentioned deficiencies in the prior art, the present invention provides a recoverable hydrogen airship and a method of using the same, which mainly meets the gas safety regulation during the process of taking off and staying in the air. During the recovery of the airship, the state of the gas is adjusted by the control system so that it can return safely to the ground.

[0008] Inventing technical solutions

[0009] A recyclable hydrogen airship comprises a main airbag, which is filled with hydrogen. A hydrogen buffer module and a hydrogen storage module can adjust the pressure in the main airbag.

[0010] Preferably, it also includes a main airbag 2, wherein the main airbag 1 is placed inside the main airbag 2, and the main airbag 2 is filled with one or more non-flammable halogenated methane gases.

[0011] Preferably, the hydrogen buffer module includes buffer tank 1 and buffer tank 2, and buffer tank 1 can inflate the main airbag 1, buffer tank 2 and the hydrogen storage module; buffer tank 2 can supply hydrogen to the fuel cell module, and buffer tank 1 is also connected to the hydrogen storage module.

[0012] Preferably, the buffer tank one and buffer tank two are equipped with a pressure sensor, a hydrogen concentration sensor and a temperature sensor, which are respectively used to monitor the pressure, concentration and temperature of the hydrogen in buffer tank one and buffer tank two. The buffer tank one is also equipped with a safety valve, a booster pump and a compressor. When the pressure sensor in the buffer tank one exceeds the allowable pressure, the safety valve opens to release the pressure; the booster pump and the compressor can pressurize the gas in the buffer tank one; solenoid valves are arranged between the buffer tank one and the main airbag one, and between the buffer tank one and buffer tank two; a pressure sensor, a pressure reducing solenoid valve and a three-way stopcock are arranged between the buffer tank one and the hydrogen storage module.

[0013] Preferably, a partition is embedded in the buffer tank, and the partition is filled with adsorbent activated alumina and activated carbon.

[0014] Preferably, the hydrogen storage module is equipped with a temperature sensor and a pressure gauge.

[0015] Preferably, the volume ratio of main airbag 1 to main airbag 2 is lower than or close to 1:0.15.

[0016] Preferably, the second main airbag is inflated through other gas storage and supply modules.

[0017] A method for using a recoverable hydrogen airship, comprising: (1) a ground inflation process, during inflation, firstly filling a main airbag 2 with a predetermined volume of halogenated alkane, and then filling a main airbag 1 with hydrogen;

[0018] During the launch and stay process, when the hydrogen pressure inside the main airbag exceeds the maximum design usage value, a portion of the hydrogen is released into the buffer tank. When the pressure of the main airbag decreases to the design limit, the buffer tank and the hydrogen storage module are combined to release hydrogen into the main airbag, and the release stops when the specified pressure is reached.

[0019] (3) During the recovery process, the hydrogen in the main airbag 1 is released into the buffer tank 1, the hydrogen in the buffer tank 1 enters the buffer tank 2, and then the hydrogen in the buffer tank 2 enters the fuel cell module 4 to act as a working fluid to supply power to the power system.

[0020] Preferably, during the ground inflation process, the main airbag is first evacuated, and then the main airbag is inflated to a certain pressure through the buffer tank.

[0021] Advantages of the present invention: This method rationally utilizes the characteristics of hydrogen. When hydrogen is used as a buoyancy gas, part of the hydrogen needs to be released due to temperature differences during the lift-off and hovering stages, and this part of the hydrogen can be collected in the buffer tank 1 through a pipeline; when hydrogen needs to be supplemented, part of the hydrogen can be released from the buffer tank 1 and the hydrogen storage module through pressure regulation to make up for the shortage of hydrogen. When hydrogen is used as a fuel, hydrogen is provided to the hydrogen fuel cell through the hydrogen storage module or (and) the main airbag. By consuming hydrogen, the net buoyancy of the airship is reduced, and the altitude gradually decreases, thereby achieving the purpose of recovery. In addition, in order to use hydrogen safely, measures such as adding non-flammable halogenated methane and safety airbags are taken to maintain safety during the use of hydrogen. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is the layout diagram of the airship capsule.

[0023] Figure 2 The figure is a general schematic diagram of a recoverable hydrogen airship of the present invention.

[0024] Figure 3 Schematic diagram of the hydrogen buffer module.

[0025] Figure 4 Schematic diagram of other gas storage and supply modules.

[0026] In the figure: In the figure: 1-bag body; 11-main airbag one; 12-main airbag two; 13-auxiliary airbag; 2-pod; 21-battery module; 3-power unit; 4-fuel cell module; 5-safety airbag; 6-hydrogen buffer module; 7-other gas storage and supply module; 61-buffer tank one; 62-buffer tank two; 63-hydrogen storage module; 4-fuel cell module; 41, 634-three-way rotary valve; 42, 60, 611, 612, 616, 621, 622, 631-intake solenoid valve; 43, 44, 632, 633-pressure reducing solenoid valve; 613-boost pump; 614-compressor; 615, 623-safety valve; 617-adsorbent activated alumina; 618-activated carbon; 619-partition. DETAILED DESCRIPTION

[0027] The present invention is achieved through the following technical solutions.

[0028] A recyclable hydrogen airship layout includes a capsule 1, a pod 2, a power device 3, a hydrogen fuel cell power supply module 4, an airbag 5, a hydrogen buffer module 6 and other gas storage and supply modules 7. The capsule 1 includes a main airbag 1 11, a main airbag 2 12, and a secondary airbag 13.

[0029] The pod 2 includes a battery module 21 , a power device 3 , a fuel cell module 4 , a hydrogen buffer module 6 , and other gas storage and supply modules 7 .

[0030] The sac 1 is filled with helium. There are two auxiliary airbags 13 located at the front bottom and the rear bottom of the sac 1 and filled with air to keep the sac 1 in shape.

[0031] The main airbag 1 11 is placed inside the main airbag 2 12 , and the airbag body materials in the two main airbags are made of a polymer composite material coated with an antistatic agent to avoid the generation or accumulation of static electricity.

[0032] The main airbag 11 is filled with hydrogen, which is provided by the hydrogen buffer module 6 through a pipeline.

[0033] The main airbag 2 12 is located in the inner middle of the airbag body 1 and always maintains a certain distance from the auxiliary airbag 13. It is filled with one or more non-flammable halogenated methane gases, which are provided by other gas storage and supply modules 7 through pipelines.

[0034] The gas volume ratio in the main airbag 1 11 and the main airbag 2 12 is lower than or close to 1:0.15, ensuring the safety of the hydrogen main airbag 1 11 in the event of leakage.

[0035] The main airbag 1 11, the main airbag 2 12 and the auxiliary airbag 13 are equipped with temperature sensors, pressure sensors and hydrogen concentration sensors to monitor the hydrogen gas state;

[0036] The battery module 21 is used to supply power to the onboard equipment and the power system.

[0037] The hydrogen buffer module includes a buffer tank 1 61, a buffer tank 2 62, a booster pump 613, a compressor 614 and related valve pipelines.

[0038] The buffer tank 61 is designed to have a maximum allowable pressure of 1 MPa. The buffer tank 61 is equipped with a pressure sensor, a hydrogen concentration sensor and a temperature sensor for monitoring the concentration and gas state of hydrogen. The safety valve 615 is used to protect the safe use of the buffer tank 61 from overpressure, that is, when the pressure sensor in the buffer tank 61 exceeds the allowable pressure, the safety valve 615 opens to release the pressure. The air intake solenoid valve 616 controls the buffer tank 61 to intake air into the main airbag 11. The air intake solenoid valve 612 controls the buffer tank 61 to intake air into the buffer tank 2 62, and pressurizes the gas in the buffer tank 61 through the booster pump 613 and the compressor 614, so that more gas can be stored in the buffer tank 2 62.

[0039] The buffer tank 1 61 has two layers of partitions 619 embedded therein, which are respectively filled with adsorbent activated alumina 617 and activated carbon 618 for adsorbing impurities other than hydrogen and air.

[0040] Each layer of the partition 619 is provided with several rows of small holes with a diameter of (1-2) mm, so that the gas can pass through the partition to enter other areas.

[0041] The buffer tank 1 61 is connected to the main airbag 1 11 , the hydrogen storage module 63 , and the buffer tank 2 62 respectively through hydrogen pipelines.

[0042] The hydrogen pipeline connecting the buffer tank 1 61 and the hydrogen storage module 63 is equipped with an intake valve 631, a pressure sensor, a pressure reducing solenoid valve 1 632, a pressure reducing solenoid valve 2 633, a three-way stopcock 634, and an intake solenoid valve 612. The pressure sensor is used to monitor the gas pressure from the hydrogen storage module 63. The pressure reducing ranges of the pressure reducing solenoid valve 1 632 and the pressure reducing solenoid valve 2 633 are (1 to Pmax) MPa (Pmax is slightly lower than or consistent with the designed maximum pressure in the hydrogen storage module) and (0.1 to 1000) kPa, respectively, which are used to reduce the pressure of the high-pressure gas in the hydrogen storage module 63 and control the delivery of hydrogen in the hydrogen storage module 63 to the buffer tank 1 61 through the intake valve 612.

[0043] The buffer tank 2 62 is connected to the buffer tank 1 61 and the fuel cell hydrogen supply pipeline respectively through the hydrogen pipeline.

[0044] The buffer tank 2 62 is designed to have a maximum allowable pressure of 20 MPa, and is equipped with a pressure sensor, a hydrogen concentration sensor and a temperature sensor for monitoring the concentration and gas state of hydrogen; hydrogen is supplied to the fuel cell hydrogen supply pipeline through the air intake solenoid valve 41, the pressure reducing solenoid valve 43 and the pressure reducing solenoid valve 44.

[0045] The hydrogen storage module 63 is equipped with a temperature sensor and a pressure gauge, and gas is supplied thereto through the air inlet valve 60 .

[0046] Safety airbags 5 are installed at the bottom and edge of the pod 2 to avoid the risk of hydrogen leakage and hydrogen explosion caused by unexpected events (violent collision between the pod and the ground) when the airship is recovered.

[0047] The other gas storage and supply module 7 contains one or more methyl halides, and the maximum internal pressure can reach 10 MPa. The gas is supplied to the main airbag 2 12 through the intake solenoid valve 71 and the pressure reducing solenoid valve 72.

[0048] How to use:

[0049] (1) Ground inflation process. During the ground inflation stage, in order to ensure the safety of hydrogen use, hydrogen is first filled into the hydrogen storage module 63 through the intake valve 60. During inflation, a predetermined volume of halogenated alkane is first filled into the main airbag 12. The specific implementation is to open the intake solenoid valve 71 and the pressure reducing solenoid valve 72 of the other gas storage and supply module 7, and to intake air into the main airbag 12 through the pipeline. After the inflation is completed, the intake solenoid valve 71 is closed. After that, hydrogen is then filled into the main airbag 11. The specific implementation is to evacuate the main airbag 11 in advance, open the intake solenoid valve 631, the intake solenoid valve 611, the intake solenoid valve 616, the pressure reducing solenoid valve 632, and the pressure reducing solenoid valve 633, and automatically control the inflation of the main airbag 11 to a certain pressure through the hydrogen pipeline and the buffer tank 161, and then close all valve components. The order of inflation ensures the safety of the hydrogen inflation process; then, air and helium are respectively filled into the auxiliary airbag 13 and the bag body 1 to the specified pressure to ensure the abundance of the bag body.

[0050] (2) Lift-off and stay-in-the-air process. During the day, due to the effect of solar radiation, the hydrogen inside the main airbag 11 heats up and expands, causing the pressure difference to increase. When it exceeds the maximum design usage value, the air intake valve 616 is opened to release a portion of the hydrogen into the buffer tank 61, and then the air intake valve 616 is closed. At night, the hydrogen in the main airbag 11 cools down and shrinks. When the airbag pressure difference is reduced to the design boundary, the air intake solenoid valve 631, the air intake solenoid valve 611, the air intake solenoid valve 616, the pressure reducing solenoid valve 632, and the pressure reducing solenoid valve 633 are opened, and the buffer tank 61 and the hydrogen storage module 63 are combined to release hydrogen into the main airbag 11 through the hydrogen pipeline to reach the specified pressure, and then all valves are closed. The purpose of combined inflation is to ensure that the pressure of the hydrogen injected is slightly higher than the pressure in the original main airbag 11, so that the inflation process can be smoothly realized.

[0051] (3) Recovery process. Open the air intake solenoid valve 616, the air intake solenoid valve 612, the air intake solenoid valve 622, the pressure relief solenoid valve 43, and the pressure relief solenoid valve 44 to release the hydrogen in the main airbag 11 into the buffer tank 1 61 through the hydrogen pipeline, and enter the buffer tank 2 62 through the compressor 614 and the booster pump 613, and then enter the fuel cell through the hydrogen pipeline 624 to act as a working medium, supply power to the power system, and speed up the recovery of the airship.

[0052] When hydrogen is used as the buoyancy gas, the hydrogen in the main airbag 11 is charged and discharged through the hydrogen buffer device 6 and the hydrogen storage module 63. During the lift-off and hovering stages, part of the hydrogen needs to be released due to the temperature difference change, and this part of the hydrogen can be collected in the buffer tank 61 through the pipeline; when hydrogen needs to be supplemented, part of the hydrogen can be released from the buffer tank 61 and the hydrogen storage module 63 through pressure regulation to make up for the lack of hydrogen, so as to maintain the net buoyancy to a certain value, which is energy-saving and environmentally friendly, and has high economic benefits.

[0053] When hydrogen is used as fuel, hydrogen is provided to the hydrogen fuel cell through the buffer tank 1 61, the hydrogen storage module 63, the main airbag 11, and the buffer tank 2 62. By consuming hydrogen, the net buoyancy of the airship is reduced, and the altitude gradually decreases, thereby achieving the purpose of recovery. This increases the upper limit of the airship's fuel storage and greatly increases the airship's working time.

[0054] In order to maintain the safety of hydrogen leakage in the main airbag 1 11 , methyl halide is filled into the main airbag 2 12 to reduce the explosion limit of hydrogen.

[0055] Safety airbags 5 are installed at the bottom and edge of the airship pod 2 to increase the safety of the airship.

[0056] The protection scope of the present invention is not limited to the above-mentioned embodiments. Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the scope of the present invention. If these changes and modifications fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include these changes and modifications.

Claims

1. A method for using a recyclable hydrogen airship, characterized in that: The hydrogen airship comprises a capsule body (1), a main airbag 1 (11), and a secondary airbag (13). The main airbag 1 (11) is filled with hydrogen, and a hydrogen buffer module (6) and a hydrogen storage module (63) are capable of regulating the pressure in the main airbag 1 (11). The main airbag 1 (11) is also provided inside the main airbag 2 (12). The main airbag 2 (12) is filled with one or more non-flammable halogenated methane gases. The secondary airbag (13) is filled with air, and the main airbag 2 (12) is located in the middle of the capsule body (1). (1) During the ground inflation process, the main airbag 1 (11) is first evacuated, and then a predetermined volume of halogenated alkane is filled into the main airbag 2 (12), and then hydrogen is filled into the main airbag 1 (11); Then, air and helium are respectively filled into the auxiliary airbag (13) and the airbag body (1) to a specified pressure; (2) During the lift-off and hovering processes, when the hydrogen pressure inside the main airbag 1 (11) exceeds the maximum design usage value, a portion of the hydrogen is released into the buffer tank 1 (61); when the pressure of the main airbag 1 (11) decreases to the design limit, the buffer tank 1 (61) and the hydrogen storage module (63) are combined to release hydrogen into the main airbag 1 (11), and the release stops when the specified pressure is reached; (3) During the recovery process, the hydrogen in the main airbag 1 (11) is released into the buffer tank 1 (61), the hydrogen in the buffer tank 1 (61) enters the buffer tank 2 (62), and then the hydrogen in the buffer tank 2 (62) enters the fuel cell module (4) to act as a working fluid to supply power to the power system.

2. The method for using a recyclable hydrogen airship according to claim 1, characterized in that: The hydrogen buffer module (6) comprises a buffer tank 1 (61) and a buffer tank 2 (62). The buffer tank 1 (61) can inflate the main airbag 1 (11), the buffer tank 2 (62) and the hydrogen storage module (63). The buffer tank 2 (62) can supply hydrogen to the fuel cell module (4). The buffer tank 1 (61) is also connected to the hydrogen storage module (63).

3. The method for using a recoverable hydrogen airship according to claim 2, characterized in that: The buffer tank 1 (61) and the buffer tank 2 (62) are equipped with a pressure sensor, a hydrogen concentration sensor and a temperature sensor, which are used to monitor the pressure, concentration and temperature of the hydrogen in the buffer tank 1 (61) and the buffer tank 2 (62) respectively. The buffer tank 1 (61) is also equipped with a safety valve (615), a booster pump (613) and a compressor (614). When the pressure sensor in the buffer tank 1 (61) exceeds the allowable pressure, the safety valve (615) opens to release the pressure; the booster pump (613) and the compressor (614) can boost the pressure of the gas in the buffer tank 1 (61); solenoid valves are arranged between the buffer tank 1 (61) and the main air bag 1 (11), and between the buffer tank 1 (61) and the buffer tank 2 (62); a pressure sensor, a pressure reducing solenoid valve and a three-way stopcock are arranged between the buffer tank 1 (61) and the hydrogen storage module (63).

4. The method for using a recoverable hydrogen airship according to claim 2, characterized in that: A partition is embedded in the buffer tank (61), and the partition contains adsorbent activated alumina (617) and activated carbon (618).

5. The method for using a recyclable hydrogen airship according to claim 1, characterized in that: The hydrogen storage module (63) is equipped with a temperature sensor and a pressure gauge.

6. The method for using a recoverable hydrogen airship according to claim 1, characterized in that: The volume ratio of the main airbag 1 (11) to the main airbag 2 (12) is lower than or close to 1:0.

15.

7. The method for using a recoverable hydrogen airship according to claim 1, characterized in that: The second main airbag (12) is inflated through another gas storage and supply module (7).

8. The method for using a recoverable hydrogen airship according to claim 1, characterized in that: During the ground inflation process, the main airbag 1 (11) is first evacuated, and then the main airbag 1 (11) is inflated to a certain pressure through the buffer tank 1 (61).

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