System and method for carbon dioxide discharge system and underwater vessel

Abstract

To effectively suppress generation of bubbles in water when exhausting carbon dioxide in inboard air of an underwater vehicle into outboard water.SOLUTION: A carbon dioxide discharge system loaded on an underwater vehicle includes: a carbon dioxide separation device for separating carbon dioxide gas from inboard air in the underwater vehicle; a gas dissolution device for dissolving carbon dioxide gas into water and generating carbonated water; a carbon dioxide gas line for supplying the carbon dioxide gas separated by the carbon dioxide separation device to the gas dissolution device; and a carbonated-water discharge line for supplying the carbonated water generated by the gas dissolution device to a discharge port opening to outside of the underwater vehicle.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present disclosure relates to a carbon dioxide gas exhaust system onboard an underwater vehicle. [Background technology]

[0002] Manned underwater vehicles that remain submerged for long periods of time are equipped with a carbon dioxide separation device that separates carbon dioxide produced by human breathing from the air inside the vessel. The carbon dioxide separated from the air inside the vessel is released into the water outside the vessel. When carbon dioxide is released into the water as bubbles, the bubbles expand due to the decompression effect as they rise underwater, and when the expanded bubbles burst, they generate noise. For underwater vehicles that require quiet operation, reducing the bursting sound of the bubbles released from the vehicle is a challenge.

[0003] Regarding the above-mentioned problem, Patent Document 1 proposes a carbon dioxide dissolution system in which a porous membrane nozzle is placed on the outer hull of a ship, and carbon dioxide gas inside the ship is atomized through the porous membrane nozzle before being released into the water outside the ship, thereby dissolving the carbon dioxide gas in the water. In other words, the system discloses that by providing a porous membrane material at the boundary between the carbon dioxide gas and the water, the carbon dioxide gas that is released outside the ship is atomized, and the carbon dioxide gas is dissolved in the water without generating carbon dioxide gas bubbles in the water. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 62-210040 Summary of the Invention [Problem to be solved by the invention]

[0005] In the configuration of Patent Document 1, fine carbon dioxide bubbles are ejected into the water outside the ship, and although it is expected that most of the carbon dioxide bubbles will dissolve in the water, there remains the possibility that some of the carbon dioxide bubbles will not dissolve in the water.

[0006] The present disclosure has been made in consideration of the above circumstances, and its purpose is to effectively suppress the generation of air bubbles in the water when carbon dioxide in the air inside an underwater vehicle is discharged into the water outside the vessel. [Means for solving the problem]

[0007] In order to solve the above problem, a carbon dioxide emission system according to one aspect of the present disclosure is a carbon dioxide emission system mounted on an underwater vehicle, comprising: a carbon dioxide separation device that separates carbon dioxide gas from the air inside the underwater vehicle; a gas dissolving device that dissolves the carbon dioxide gas in water to produce carbonated water; a carbon dioxide line for sending the carbon dioxide separated by the carbon dioxide separator to the gas dissolving device; and a carbonated water discharge line that sends the carbonated water generated by the gas dissolving device to a discharge outlet that opens outside the underwater vehicle.

[0008] An underwater vehicle according to one aspect of the present disclosure includes a hull and the carbon dioxide emission system mounted on the hull.

[0009] A carbon dioxide emission method according to one aspect of the present disclosure is a carbon dioxide emission method for emitting carbon dioxide contained in air inside an underwater vehicle outside the vehicle, the method comprising: separating carbon dioxide gas from the ship's air; Dissolving the separated carbon dioxide gas in water to produce carbonated water; and and discharging the produced carbonated water into the water outside the underwater vehicle. [Effects of the Invention]

[0010] According to the present disclosure, when carbon dioxide in the air inside an underwater vehicle is discharged into the water outside the vehicle, the generation of air bubbles in the water can be effectively suppressed. [Brief explanation of the drawings]

[0011] [Figure 1] FIG. 1 is a diagram showing an example of an underwater vehicle equipped with a carbon dioxide emission system according to the present disclosure. [Figure 2] FIG. 2 is a schematic system diagram of a carbon dioxide emission system according to one embodiment of the present disclosure. [Figure 3] FIG. 3 is a configuration diagram of the control system of the carbon dioxide emission system. [Figure 4] FIG. 4 is a flowchart of the processing of the control device. DETAILED DESCRIPTION OF THE INVENTION

[0012] Next, an embodiment of the present disclosure will be described with reference to the drawings. FIG. 1 is a diagram showing an example of an underwater vehicle 100 equipped with a carbon dioxide emission system 1 according to one aspect of the present disclosure. The underwater vehicle 100 illustrated in FIG. 1 includes a hull 101 and a carbon dioxide emission system 1 mounted on the hull 101. The underwater vehicle 100 is a vessel capable of traveling underwater and on the surface of the water, and examples of the underwater vehicle 100 include an underwater work vessel and a submersible. The carbon dioxide emission system 1 selectively removes carbon dioxide gas from the air in a manned cabin 98 of the underwater vehicle 100 (hereinafter referred to as onboard air 12) and emits it outside the ship.

[0013] [Carbon dioxide exhaust system 1] Here, we will explain in detail the configuration of the carbon dioxide emission system 1. Figure 2 is a schematic system diagram of the carbon dioxide emission system 1 according to one embodiment of the present disclosure. The carbon dioxide emission system 1 shown in Figure 2 includes a carbon dioxide separation device 15, a carbon dioxide gas line 2, a gas dissolver 3, a water line 4, and a carbonated water emission line 5.

[0014] The carbon dioxide separation device 15 is a device that separates carbon dioxide from the onboard air 12 of the underwater vehicle 100. The configuration of the carbon dioxide separation device 15 is not particularly limited as long as it can separate carbon dioxide from the onboard air 12. The carbon dioxide separation device 15 may be a carbon dioxide separation device of a known configuration, such as one that adsorbs carbon dioxide in the onboard air 12 onto an amine-based carbon dioxide adsorbent and then desorbs the carbon dioxide from the adsorbent in the form of carbon dioxide gas.

[0015] The gas dissolver 3 is a device that produces carbonated water by dissolving carbon dioxide gas in water. When the underwater vehicle 100 travels underwater, the gas dissolver 3 produces carbonated water by dissolving carbon dioxide gas in seawater instead of water. The gas dissolver 3 is preferably capable of dissolving carbon dioxide gas in water at a higher concentration. The configuration of the gas dissolver 3 is not particularly limited as long as it can dissolve carbon dioxide gas in water. The gas dissolver 3 may be a gas dissolver with a known configuration, such as a device that supplies a liquid and fine gas bubbles to a sealed tank and dissolves the gas in the liquid via the fine bubbles, or a device that supplies a liquid and a gas to a sealed tank and causes the liquid to collide with a barrier provided in the sealed tank, generating a large amount of liquid droplets, thereby dissolving the gas in the liquid droplets.

[0016] The carbon dioxide line 2 is a flow path that sends carbon dioxide separated from the onboard air 12 by the carbon dioxide separation device 15 to the gas dissolver 3. The carbon dioxide line 2 is composed of piping and the like that connects the carbon dioxide separation device 15 and the gas dissolver 3. The carbon dioxide line 2 is provided with a compressor 22, a switching device 23, a flow control valve 25, and a switching valve 26 in this order from upstream to downstream of the flow of carbon dioxide.

[0017] At least one accumulator tank 24 is connected to the carbon dioxide line 2 via a switching device 23. The accumulator tank 24 stores carbon dioxide compressed by a compressor 22. The accumulator tank 24 stores a pressure sufficient to discharge carbonated water (or carbon dioxide) against the pressure of the water surrounding the underwater vehicle 100. From the viewpoint of effectively dissolving carbon dioxide in water in the gas dissolver 3, it is preferable that the pressure of the carbon dioxide supplied from the accumulator tank 24 to the gas dissolver 3 be greater than the pressure of the water supplied to the gas dissolver 3.

[0018] The switching device 23 switches between a state in which carbon dioxide gas compressed by the compressor 22 flows into the accumulator tank 24, a state in which the main stream of the carbon dioxide gas line 2 is blocked from the accumulator tank 24 and the carbon dioxide gas is stored in the accumulator tank 24, and a state in which the carbon dioxide gas stored in the accumulator tank 24 flows out into the main stream of the carbon dioxide gas line 2. When there are multiple accumulator tanks 24, the switching device 23 can individually switch between the inflow, storage, and outflow of carbon dioxide gas for each of the accumulator tanks 24.

[0019] A gas exhaust line 28 is connected to the carbon dioxide line 2 via a switching valve 26. The gas exhaust line 28 is a flow path that sends carbon dioxide from the carbon dioxide line 2 to an exhaust port 27. The exhaust port 27 is disposed, for example, on the outer wall of the underwater vehicle 100 and opens to the outside of the vessel.

[0020] The switching valve 26 can switch the flow path of the carbon dioxide gas between a flow path that sends the carbon dioxide gas to the gas dissolver 3 through the carbon dioxide gas line 2 and a flow path that sends the carbon dioxide gas to the exhaust port 27 through the gas exhaust line 28. In other words, the switching valve 26 can switch the carbon dioxide gas exhaust method between a method of discharging the carbon dioxide gas in a state where it is dissolved in water in the gas dissolver 3, and a method of discharging the carbon dioxide gas in a gaseous state. The flow rate adjustment valve 25 adjusts the flow rate of the carbon dioxide gas depending on the carbon dioxide gas exhaust method.

[0021] The water line 4 is connected to the gas dissolver 3 and is a flow path for sending water, which serves as a solvent for carbon dioxide, to the gas dissolver 3. The water line 4 is provided with a pressure pump 41 that pressurizes the water and an on-off valve 42. Operation of the pressure pump 41 causes the water to be pressurized and sent to the gas dissolver 3. The water line 4 may send water taken in from outside the underwater vehicle 100 to the gas dissolver 3, or may send water taken into the underwater vehicle 100 as cooling water for equipment mounted on the underwater vehicle 100 to the gas dissolver 3.

[0022] The carbonated water discharge line 5 is a flow path that sends carbonated water, which is generated by dissolving carbon dioxide gas in water in the gas dissolver 3, from the gas dissolver 3 to a drain outlet 51. The drain outlet 51 is disposed, for example, on the outer wall of the underwater vehicle 100 and opens to the outside of the ship.

[0023] [Method of operating carbon dioxide emission system 1] Here, we will explain the operating method of the carbon dioxide emission system 1 configured as described above. First, carbon dioxide gas is stored at a predetermined pressure in the accumulator tank 24. Here, in the carbon dioxide separation device 15, carbon dioxide is separated from the onboard air 12, and carbon dioxide gas in which the carbon dioxide is concentrated is produced. This carbon dioxide gas flows out from the carbon dioxide separation device 15 to the carbon dioxide gas line 2. The carbon dioxide gas that has flowed into the carbon dioxide gas line 2 is pressurized by the compressor 22, and flows into the accumulator tank 24, which has been made available for inflow by the switching device 23. Carbon dioxide gas flows into the accumulator tank 24 until the pressure in the accumulator tank 24 reaches a predetermined pressure, and carbon dioxide gas at the predetermined pressure is stored in the accumulator tank 24.

[0024] When carbon dioxide gas is released through the gas dissolver 3, the switching device 23 and the switching valve 26 are switched so that the carbon dioxide gas stored in the accumulator tank 24 flows to the gas dissolver 3 through the carbon dioxide line 2. The flow rate of the carbon dioxide gas supplied to the gas dissolver 3 is adjusted by the flow rate control valve 25. The carbon dioxide gas supplied from the accumulator tank 24 to the gas dissolver 3 through the carbon dioxide line 2 is dissolved in water supplied to the gas dissolver 3 through the water line 4 by operation of the pressure pump 41, to become carbonated water. The carbonated water flows from the carbon dioxide separator 15 through the carbonated water discharge line 5 to the drain outlet 51 and is discharged outside the ship from the drain outlet 51. In this way, the carbon dioxide inside the ship is discharged into the water outside the ship as contained in the carbonated water, thereby effectively suppressing the generation of carbon dioxide bubbles in the water and preventing the generation of noise caused by the popping of carbon dioxide bubbles.

[0025] When carbon dioxide gas is released without passing through the gas dissolving device 3, the switching device 23 and the switching valve 26 are switched so that the carbon dioxide gas stored in the accumulator tank 24 flows through the carbon dioxide gas line 2 to the gas discharge line 28. The carbon dioxide gas sent from the accumulator tank 24 to the discharge port 51 through the carbon dioxide gas line 2 and the gas discharge line 28 is discharged outside the ship from the discharge port 51. The flow rate of the carbon dioxide gas discharged from the discharge port 51 is adjusted by the flow control valve 25.

[0026] In the carbon dioxide exhaust system 1 described above, the switching valve 26 can be switched manually, but the switching valve 26 may also be switched automatically as described below.

[0027] The discharge pressure of the carbon dioxide gas from the accumulator tank 24 varies depending on the level of pressure stored in the accumulator tank 24. Furthermore, the pressure of the water taken in by the underwater vehicle 100 from outside the ship varies depending on the depth of the underwater vehicle 100. Due to these factors, the pressure balance between the carbon dioxide gas and water supplied to the gas dissolver 3 varies. Meanwhile, an optimum pressure balance range between the carbon dioxide gas and water is predetermined based on the specifications of the gas dissolver 3. Therefore, the switching valve 26 may be automatically switched so that the carbon dioxide gas is discharged via the gas dissolver 3 when the pressure balance between the carbon dioxide gas and water is within a predetermined operating range, and the carbon dioxide gas is discharged without passing through the gas dissolver 3 when the pressure balance between the carbon dioxide gas and water is outside the predetermined operating range.

[0028] FIG. 3 is a configuration diagram of the control system of the carbon dioxide emission system 1. As shown in FIG. 3, the carbon dioxide emission system 1 includes a control device 6. The control device 6 is electrically connected to the switching device 23, the switching valve 26, and the flow rate control valve 25 and controls their operation. The control device 6 is also electrically connected to a carbon dioxide pressure detector 61 that detects the pressure of the carbon dioxide gas supplied to the gas dissolution device 3 and a water pressure detector 62 that detects the water pressure at the current position of the underwater vehicle 100, and acquires the detected values ​​output from these detectors. The carbon dioxide pressure detector 61 is only required to detect the pressure of the carbon dioxide gas supplied from the accumulator tank 24 to the gas dissolution device 3, and may be provided, for example, at the carbon dioxide line 2 or the outlet of the accumulator tank 24. The water pressure detector 62 is only required to detect the water pressure in a space that is in communication with the outside or inside of the underwater vehicle 100, and may be provided, for example, in the water line 4.

[0029] FIG. 4 is a flowchart of the processing of the control device 6. As shown in FIG. 4, the control device 6 acquires the detected values ​​output from the carbon dioxide pressure detector 61 and the water pressure detector 62 (step S01). Based on these detected values, the control device 6 determines whether the pressure balance between carbon dioxide and water is within a preset operating range for the gas dissolver 3 (step S02). The operating range is the range of pressure balance between carbon dioxide and water in which carbon dioxide can be dissolved in water, and varies depending on the specifications of the gas dissolver 3 and other conditions. The operating range is determined in advance based on experiments, simulations, etc. and is stored in the control device 6. If the pressure balance between carbon dioxide and water is within the operating range (YES in step S02), the control device 6 switches the switching device 23 and the switching valve 26 so that carbon dioxide flows to the gas dissolver 3 (step S03), and adjusts the aperture of the flow control valve 25 so that a predetermined amount of carbon dioxide is supplied to the gas dissolver 3 (step S05). Also, if the pressure balance between carbon dioxide and water is outside the operating range (NO in step S02), the control device 6 switches the switching device 23 and the switching valve 26 so that the carbon dioxide flows to the exhaust port 27 without passing through the gas dissolution device 3 (step S04), and adjusts the opening of the flow control valve 25 so that a predetermined amount of carbon dioxide is discharged from the exhaust port 27 (step S05).

[0030] In this way, the carbon dioxide emission system 1 can automatically switch between emitting carbon dioxide dissolved in water via the gas dissolver 3, or emitting carbon dioxide in gaseous form without going through the gas dissolver 3, depending on the fluctuating pressure balance between carbon dioxide and water.

[0031] [Summary] A carbon dioxide emission system 1 according to a first aspect of the present disclosure is a carbon dioxide emission system 1 mounted on an underwater vehicle 100, a carbon dioxide separation device 15 that separates carbon dioxide gas from the air 12 inside the underwater vehicle 100; a gas dissolving device 3 that dissolves carbon dioxide gas in water to produce carbonated water; a carbon dioxide line 2 for sending the carbon dioxide separated by the carbon dioxide separator 15 to the gas dissolver 3; The carbonated water discharge line 5 sends the carbonated water generated by the gas dissolving device 3 to a discharge outlet 51 that opens outside the underwater vehicle 100.

[0032] With the carbon dioxide exhaust system 1 configured as described above, the carbon dioxide gas in the onboard air 12, i.e., carbon dioxide gas, is dissolved in carbonated water and exhausted into the water outside the ship. This effectively suppresses the generation of carbon dioxide bubbles in the water and prevents noise caused by the popping of carbon dioxide bubbles.

[0033] The carbon dioxide emission system 1 according to the second item of the present disclosure is the carbon dioxide emission system 1 according to the first item, in which the carbon dioxide line 2 has a compressor 22 that compresses carbon dioxide, an accumulator tank 24 that stores carbon dioxide, and a switching device 23 that switches between a state in which the carbon dioxide compressed by the compressor 22 flows into the accumulator tank 24 and a state in which the carbon dioxide stored in the accumulator tank 24 flows out.

[0034] This makes it possible to store a pressure in the pressure accumulator tank 24 that is sufficient to discharge carbonated water (or carbon dioxide gas) against the pressure of the water surrounding the underwater vehicle 100.

[0035] The carbon dioxide emission system 1 according to the third item of the present disclosure is the carbon dioxide emission system 1 according to the second item, in which the pressure of the carbon dioxide gas supplied to the gas dissolution device 3 is greater than the pressure of the water supplied to the gas dissolution device 3.

[0036] This allows the gas dissolver 3 to dissolve carbon dioxide gas in water at a higher concentration.

[0037] The carbon dioxide emission system 1 relating to the fourth item of the present disclosure is a carbon dioxide emission system 1 relating to any of the first to third items, further comprising a gas emission line 28 that is connected to the carbon dioxide line 2 via a switching valve 26 and sends the carbon dioxide flowing through the carbon dioxide line 2 to an exhaust port 27 that opens outside the underwater vehicle 100.

[0038] This makes it possible to switch between a mode in which carbon dioxide gas is discharged in a gaseous state and a mode in which carbon dioxide gas is dissolved in water by the gas dissolver 3 and then discharged, depending on the situation.

[0039] The carbon dioxide emission system 1 according to the fifth item of the present disclosure is the carbon dioxide emission system 1 according to the fourth item, a carbon dioxide pressure detector 61 for detecting the pressure of carbon dioxide flowing into the gas dissolving device 3; a water pressure detector 62 for detecting the water pressure at the current position of the underwater vehicle 100; and a control device 6 for controlling the operation of the switching valve 26 based on the detected values ​​of the carbon dioxide pressure detector 61 and the water pressure detector 62. The control device 6 is configured to switch the switching valve 26 so that the carbon dioxide gas flows to the gas dissolution device 3 when the pressure balance between the carbon dioxide gas pressure detected by the carbon dioxide gas pressure detector 61 and the water pressure detected by the water pressure detector 62 is within a predetermined operating range, and to switch the switching valve 26 so that the carbon dioxide gas flows to the exhaust port 27 when the pressure balance is outside the operating range.

[0040] This allows automatic switching between discharging carbon dioxide in gaseous form and dissolving carbon dioxide in water in the gas dissolving device 3 and discharging the same based on the pressure balance between carbon dioxide and water.

[0041] An underwater vehicle 100 according to a sixth aspect of the present disclosure includes a hull 101 and a carbon dioxide emission system 1 according to any one of the first to fifth aspects mounted on the hull 101.

[0042] The carbon dioxide emission system 1 having the above configuration is suitable for an underwater vehicle 100 that travels underwater and on the water, and is particularly suitable for an underwater vehicle that requires quietness.

[0043] A carbon dioxide emission method according to a seventh aspect of the present disclosure is a carbon dioxide emission method for emitting carbon dioxide contained in the onboard air 12 of an underwater vehicle 100 to the outside of the vehicle, the method comprising: Separating carbon dioxide from the ship's air 12; Dissolving the separated carbon dioxide gas in water to produce carbonated water; and This includes discharging the produced carbonated water into the water outside the underwater vehicle 100.

[0044] According to the above carbon dioxide exhaust method, the carbon dioxide gas in the onboard air 12, i.e., carbon dioxide gas, is dissolved in carbonated water and exhausted into the water outside the ship. This effectively suppresses the generation of carbon dioxide bubbles in the water and prevents noise caused by the bursting of carbon dioxide bubbles.

[0045] The functions performed by the controller 6 described herein may be implemented in circuitry or processing circuitry, including general-purpose processors, application-specific processors, integrated circuits, ASICs (Application Specific Integrated Circuits), CPUs (Central Processing Units), conventional circuits, and / or combinations thereof, programmed to perform the described functions. Processors include transistors and other circuits and are considered circuitry or processing circuitry. A processor may also be a programmed processor that executes a program stored in memory. In this specification, a circuit, unit, or means is hardware that is programmed to perform or executes the described functions. The hardware may be any hardware disclosed herein or any hardware known to be programmed to perform or execute the described functions. When the hardware is a processor, which is considered a type of circuitry, the circuit, means, or unit is a combination of hardware and software used to configure the hardware and / or processor.

[0046] The foregoing disclosure has been presented for purposes of illustration and description and is not intended to limit the disclosure to the form disclosed herein. For example, in the foregoing Detailed Description, various features of the disclosure are grouped together in a single embodiment for the purpose of streamlining the disclosure, but some of the features may also be combined. Furthermore, the features included in the present disclosure may be combined into alternative embodiments, configurations, or aspects other than those discussed above. [Explanation of symbols]

[0047] 1: Carbon dioxide emission system 2: Carbon dioxide line 3: Gas dissolving device 5: Carbonated water discharge line 6: Control device 12: Onboard air 15: Carbon dioxide separator 22: Compressor 23: Switching device 24: Accumulator tank 26: Switching valve 27: Exhaust port 28: Gas exhaust line 51:Drain port 61: Carbon dioxide pressure detector 62: Water pressure detector 100: Underwater vehicle 101: Hull

Claims

1. A carbon dioxide emission system mounted on an underwater vehicle, comprising: a carbon dioxide separation device that separates carbon dioxide gas from the air inside the underwater vehicle; a gas dissolving device that dissolves the carbon dioxide gas in water to produce carbonated water; a carbon dioxide line for sending the carbon dioxide separated by the carbon dioxide separator to the gas dissolving device; a carbonated water discharge line that sends the carbonated water generated by the gas dissolving device to a discharge outlet that opens outside the underwater vehicle, Carbon dioxide emission system.

2. The carbon dioxide line includes a compressor that compresses the carbon dioxide, an accumulator tank that stores the carbon dioxide, and a switching device that switches between a state in which the carbon dioxide compressed by the compressor flows into the accumulator tank and a state in which the carbon dioxide stored in the accumulator tank flows out. The carbon dioxide exhaust system of claim 1 .

3. The pressure of the carbon dioxide gas supplied to the gas dissolver is greater than the pressure of the water supplied to the gas dissolver. The carbon dioxide exhaust system of claim 2 .

4. a gas exhaust line connected to the carbon dioxide line via a switching valve, for sending the carbon dioxide flowing through the carbon dioxide line to an exhaust port opening to the outside of the underwater vehicle, A carbon dioxide exhaust system according to any one of claims 1 to 3.

5. a carbon dioxide pressure detector that detects the pressure of the carbon dioxide gas flowing into the gas dissolving device; a water pressure detector for detecting the water pressure at the current position of the underwater vehicle; a control device that controls the operation of the switching valve based on the detected values ​​of the carbon dioxide pressure detector and the water pressure detector, The control device is configured to switch the switching valve so that the carbon dioxide gas flows to the gas dissolving device when the pressure balance between the carbon dioxide gas pressure detected by the carbon dioxide gas pressure detector and the water pressure detected by the water pressure detector is within a predetermined operating range, and to switch the switching valve so that the carbon dioxide gas flows to the exhaust port when the pressure balance is outside the operating range. The carbon dioxide exhaust system of claim 4.

6. The hull and and the carbon dioxide emission system of claim 1 mounted on the hull. Underwater vehicle.

7. A carbon dioxide discharging method for discharging carbon dioxide contained in air inside an underwater vehicle to the outside, comprising: separating carbon dioxide gas from the ship's air; Dissolving the separated carbon dioxide gas in water to produce carbonated water; and Discharging the produced carbonated water into the water outside the underwater vehicle. Carbon dioxide emission methods.

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