Alternative fuel vessel

Abstract

To provide an alternative fuel vessel capable of suppressing contamination of residence area by alternative fuel gas.SOLUTION: An alternative fuel vessel 1 includes a plurality of fresh air inlets for taking in fresh air to a prescribed place in residence area 8 from outside the vessel (a first fresh air inlet 14 and a second fresh air inlet 15). The first fresh air inlet 14 and the second fresh air inlet 15 are installed in positions separated from each other. For example, the first fresh air inlet 14 is arranged on the port side and the second fresh air inlet 15 is arranged on the starboard side.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to an alternative fuel ship, and more particularly to an alternative fuel ship that uses alternative fuels such as methanol, ethanol, LPG (liquefied petroleum gas), and ammonia. [Background technology]

[0002] In recent years, zero emissions have been proposed to reduce the discharge of polluting substances and waste from the perspective of environmental conservation. In the field of international shipping, alternative fuels have also been attracting attention as fuels that emit little or no carbon dioxide (CO2) when burned, and the development of alternative-fuel ships is progressing. Alternative fuels are fuels that can replace conventional natural petroleum-based fuels. Examples of alternative fuels include methanol, ethanol, LPG (liquefied petroleum gas), and ammonia.

[0003] Generally, an air conditioner is installed in the accommodation area of ​​a ship, and the ship is designed to allow outside air (fresh air) to be taken inside. For example, the ship described in Patent Document 1 has a fresh air intake located on the roof panel of the accommodation area. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Jikko No. 56-28079 Summary of the Invention [Problem to be solved by the invention]

[0005] Ammonia, one of the alternative fuels, has a boiling point of -33°C under atmospheric pressure, and is stored on board as liquefied ammonia at low temperature or high pressure. On ships that use ammonia as fuel for their main propulsion engines, unburned ammonia may be released into the atmosphere from exhaust pipes or due to equipment damage. At atmospheric pressure, ammonia becomes a toxic and odorous gas that disperses into the surrounding area. If it were to be released into the atmosphere, the gas could be mixed into the ship through the air conditioning units in the accommodation areas.

[0006] Therefore, on alternative fuel ships that use alternative fuels such as ammonia, which may have an adverse effect on the human body due to their toxicity and odor, it is necessary to protect the crew on board from the alternative fuel gas.

[0007] The present invention was devised in view of the above problems, and aims to provide an alternative fuel ship that can prevent alternative fuel gas from being mixed into the accommodation area. [Means for solving the problem]

[0008] According to the present invention, an alternative fuel ship that uses alternative fuel is provided, characterized in that it is equipped with multiple fresh air intakes that draw in outside air from outside the ship to designated locations within the living area.

[0009] At least one of the plurality of fresh air intakes may be located on the port side, and at least one of the plurality of fresh air intakes may be located on the starboard side.

[0010] The alternative fuel ship may include an airtight damper arranged downstream of each of the plurality of fresh air intakes and capable of blocking a flow path.

[0011] The alternative fuel ship may be provided with a gas detector that is arranged upstream of the airtight damper and detects the alternative fuel gas.

[0012] The airtight damper may be configured to block the flow path when the gas detector detects a concentration of the alternative fuel gas that exceeds a predetermined threshold.

[0013] The air conditioner installed in the living area may be configured to operate by internal air circulation without taking in outside air when all flow paths are blocked by the gas detector, or may be configured to stop operation.

[0014] A room installed within the living area and having a ventilation duct communicating with the outside air may have an output unit that outputs an alert when the gas detector detects an alternative fuel gas concentration that exceeds a predetermined threshold.

[0015] At least one of the plurality of fresh air intakes may be located below an alternative fuel gas exhaust outlet installed on the deck.

[0016] At least one of the plurality of fresh air intakes may be located aft of the accommodation area.

[0017] The predetermined location may be an air conditioner, a mixing chamber of the air conditioner, or a cooking room. [Effects of the Invention]

[0018] According to the alternative fuel ship of the present invention described above, since it is equipped with multiple fresh air intakes that take in outside air into the living area, at least two systems of fresh air intakes can be installed, and even if one fresh air intake cannot be used, the other fresh air intake can be used, making it possible to prevent alternative fuel gas from mixing into the living area even when facilities in the living area are operating normally. [Brief explanation of the drawings]

[0019] [Figure 1] FIG. 1 is a schematic diagram of an alternative fuel ship. [Figure 2]1A and 1B are explanatory diagrams showing the arrangement of a first fresh air intake and a second fresh air intake, where (A) is a first example and (B) is a second example. [Figure 3] FIG. 10 is a diagram illustrating the function of the first fresh air intake during normal operation. [Figure 4] FIG. 10 is a diagram illustrating the function of the second fresh air intake during normal operation. [Figure 5] FIG. 2 is a functional explanatory diagram of the air conditioner when it is operated in the internal air circulation mode. [Figure 6] FIG. 4 is a diagram illustrating functions when the air conditioner is stopped. DETAILED DESCRIPTION OF THE INVENTION

[0020] Hereinafter, an embodiment of the present invention will be described with reference to Figs. 1 to 6. Fig. 1 is a schematic diagram of an alternative fuel ship. Fig. 2 is an explanatory diagram showing the arrangement of a first fresh air intake and a second fresh air intake, with (A) being a first example and (B) being a second example. In Fig. 1, the length direction of the ship is defined as the X axis, the width direction of the ship as the Y axis, and the height direction of the ship as the Z axis.

[0021] As shown in FIG. 1, the alternative fuel ship 1 includes, for example, an alternative fuel tank 2 for storing the alternative fuel, a reliquefaction device 3 for reliquefying the vaporized gas generated from the alternative fuel tank 2, an alternative fuel engine 4 that uses the alternative fuel, a generator 5 that uses the alternative fuel, a fuel supply device 6 that supplies alternative fuel from the alternative fuel tank 2 to the alternative fuel engine 4 and the generator 5, and a bunker station 7 that supplies alternative fuel to the alternative fuel tank 2.

[0022] The alternative fuel ship 1 also includes a living quarters 8 that provide work areas and living space for the crew, and an engine room 9 in which internal combustion engines such as alternative fuel engines 4 and generators 5 are installed. The living quarters 8 are located, for example, on an upper deck 10. The engine room 9 also includes, for example, a lower space located below the upper deck 10 and an upper space located above the upper deck 10.

[0023] A chimney 11 for discharging exhaust gas from the internal combustion engine is disposed above the engine room 9. A vent post 12 for adjusting the internal pressure of the cargo tank and for ventilation may also be disposed on the upper deck 10. A ventilation tube 13 for ventilating the reliquefaction equipment 3 and the fuel supply equipment 6 may also be disposed.

[0024] The configuration of the alternative fuel ship 1 shown in Figure 1 is merely an example, and is not limited to the configuration and arrangement shown. For example, the reliquefaction device 3 can be omitted as needed, and the alternative fuel tank 2 may be a cargo tank.

[0025] Furthermore, for example, if the alternative fuel ship 1 is also an alternative fuel cargo transport ship, the alternative fuel tank 2 may be a tank that can also be used as an alternative fuel cargo, and the bunker station 7 may be a cargo manifold.

[0026] The alternative fuel ship 1 may also be a hybrid ship that uses other propulsion equipment such as a diesel engine and an electric motor. The alternative fuel ship 1 may also be one that employs a multi-fuel engine that switches between multiple fuels.

[0027] The alternative fuel is, for example, ammonia, but may also be other alternative fuels (methanol, ethanol, LPG, etc.). When the alternative fuel gas is highly toxic, such as ammonia gas, it is important to prevent the alternative fuel and alternative fuel gas from leaking and to suppress the diffusion of leaked alternative fuel gas in order to minimize the impact on the human body and the environment.

[0028] The alternative fuel ship 1 according to this embodiment is equipped with multiple fresh air intakes (in this embodiment, a first fresh air intake 14 and a second fresh air intake 15) that take in outside air from outside the ship to predetermined locations within the accommodation area 8. The first fresh air intake 14 and the second fresh air intake 15 are located at positions separated from each other. For example, the first fresh air intake 14 is located on the port side, and the second fresh air intake 15 is located on the starboard side.

[0029] In the alternative fuel ship 1 described above, exhaust gas and ventilation gas are discharged overboard from the chimney 11, vent post 12, and ventilator 13. This exhaust gas and ventilation gas may contain unburned alternative fuel or alternative fuel gas that is vaporized from the alternative fuel. Therefore, it is preferable to prevent these gases discharged overboard from being inhaled into the accommodation space 8.

[0030] Therefore, this embodiment is characterized by providing two overlapping systems of fresh air intakes that take in fresh air from outside the ship into the accommodation space 8. In this case, it is preferable that the two systems of fresh air intakes (first fresh air intake 14 and second fresh air intake 15) be located at positions separated from each other so as not to take in the same atmospheric gas.

[0031] If a vent post 12 or ventilation duct 13 is located forward (towards the bow) of the living area 8, it is possible that these exhaust gases may flow towards the stern, pass through the port side of the living area 8, pass through the starboard side of the living area 8, or pass separately on the port and starboard sides of the living area 8.

[0032] Considering such a phenomenon, it is preferable to arrange the two systems of fresh air intakes (first fresh air intake 14 and second fresh air intake 15) separately on the port side and starboard side. In this embodiment, for convenience of explanation, the fresh air intake arranged on the port side is referred to as the first fresh air intake 14, and the fresh air intake arranged on the starboard side is referred to as the second fresh air intake 15. In this specification, "port side" means "the area on the port side of the center of the overall width of the accommodation area," and "starboard side" means "the area on the starboard side of the center of the overall width of the accommodation area."

[0033] Furthermore, since alternative fuel gas generally has a light specific gravity, it tends to move upward when discharged from the chimney 11, the vent post 12, and the ventilator 13. Therefore, the first fresh air intake 14 and the second fresh air intake 15 may be located below the alternative fuel gas exhaust ports (the vent post 12, the ventilator 13, etc.) installed on the upper deck 10.

[0034] Furthermore, gas flowing in from the front (bow side) of the accommodation space 8 collides with the front wall of the accommodation space 8 and is flowed to the port side or starboard side, and at this time, it is considered that the further aft (stern side) it is, the further it is from the outer wall surface of the accommodation space 8. Therefore, the first fresh air intake 14 and the second fresh air intake 15 may be located closer to the stern of the accommodation space 8. In this specification, "closer to the stern" means "an area closer to the stern than the center of the accommodation space 8 in the bow-stern direction."

[0035] For example, as shown in Figures 2(A) and 2(B), the first fresh air intake 14 is arranged near the stern on the port side of the accommodation space 8, and the second fresh air intake 15 is arranged near the stern on the starboard side of the accommodation space 8. The fresh air intake direction may be set so that it is taken in from the side as shown in Figure 2(A), or so that it is taken in from the rear as shown in Figure 2(B). Although not shown, the first fresh air intake 14 and the second fresh air intake 15 may be arranged externally to the wall or rear surface of the accommodation space 8.

[0036] Next, the functions of the first fresh air intake 14 and the second fresh air intake 15 will be described with reference to Figs. 3 to 6. Fig. 3 is a diagram illustrating the function of the first fresh air intake during normal operation. Fig. 4 is a diagram illustrating the function of the second fresh air intake during normal operation. Fig. 5 is a diagram illustrating the function when the air conditioner is operating in the inside air recirculation mode. Fig. 6 is a diagram illustrating the function when the air conditioner is stopped.

[0037] In Figure 3, the living area 8 is shown as an area surrounded by a dotted line. The living area 8 is divided into several sections based on the ventilation configuration. For example, the living area 8 is divided into a natural exhaust section 81 having a ventilation duct 81a communicating with the outside air, a mechanical exhaust section 82 having a ventilation duct 82a communicating with the outside air, a fan 82b and an airtight damper 82c, and an air conditioner section 83 having an air conditioner 83a and a mixing chamber 83b.

[0038] The natural exhaust section 81 includes rooms where people stay for a relatively short time, such as an electrical equipment room, a food storeroom, and a changing room. Each room in the natural exhaust section 81 is configured to be constantly in communication with the outside air via a ventilation duct 81a. Fresh air is supplied to each room in the natural exhaust section 81 from an air conditioner 83a via an air supply duct 81b. An airtight damper 81c is arranged in the air supply duct 81b.

[0039] The mobile exhaust compartment 82 includes rooms where people spend a relatively long time, such as living rooms, dining rooms, break rooms, offices, and gyms. Each room in the mobile exhaust compartment 82 is configured to be able to communicate with the outside air via a ventilation duct 82a. The airtight damper 82c can open or close the flow path by opening and closing its blades. The airtight damper 82c is located upstream of the fan 82b. Therefore, by operating the fan 82b with the airtight damper 82c open, air can be forcibly exhausted from each room in the mobile exhaust compartment 82 to the outside air.

[0040] A circulation duct 82d communicating with the mixing chamber 83b is disposed in each room of the mechanical exhaust section 82. Fresh air is supplied to each room of the mechanical exhaust section 82 from the air conditioner 83a via an air supply duct 82e. When the airtight damper 82c is closed, the air in each room of the mechanical exhaust section 82 is circulated inside via the circulation duct 82d.

[0041] The air conditioner 83a is a device that supplies fresh air to each of the natural exhaust section 81 and the mechanical exhaust section 82. A mixing chamber 83b is arranged upstream of the air conditioner 83a. A first air supply duct 83c communicated with the first fresh air intake port 14, a second air supply duct 83d communicated with the second fresh air intake port 15, and a circulation duct 82d from the mechanical exhaust section 82 are connected to the mixing chamber 83b.

[0042] An airtight damper 83e capable of blocking the flow path is disposed in the first air supply duct 83c downstream of the first fresh air intake 14. Also, a gas detector 83f that detects the alternative fuel gas is disposed in the first air supply duct 83c upstream of the airtight damper 83e.

[0043] An airtight damper 83g capable of blocking the flow path is disposed in the second air supply duct 83d downstream of the second fresh air intake 15. Also, a gas detector 83h for detecting the alternative fuel gas is disposed in the second air supply duct 83d upstream of the airtight damper 83g.

[0044] In addition, in cases where it is necessary to place independent air conditioning and ventilation equipment, such as in the kitchen 84 (GALLEY), which is a facility within the living area 8, an air conditioner 85 is installed in addition to the air conditioner 83a in the natural exhaust area 81 and the mechanical exhaust area 82.

[0045] A first air supply duct 84a, which is connected to the first fresh air intake port 14, and a second air supply duct 84b, which is connected to the second fresh air intake port 15, are connected to the cooking chamber 84. In addition, an air supply duct 84c, which supplies air from an air conditioner 85, is connected to the cooking chamber 84.

[0046] An airtight damper 84d capable of blocking the flow path is disposed in the first air supply duct 84a downstream of the first fresh air intake 14. Also, a gas detector 84e for detecting the alternative fuel gas is disposed in the first air supply duct 84a upstream of the airtight damper 84d.

[0047] An airtight damper 84f capable of blocking the flow path is disposed in the second air supply duct 84b downstream of the second fresh air intake 15. Also, a gas detector 84g that detects the alternative fuel gas is disposed in the second air supply duct 84b upstream of the airtight damper 84f.

[0048] A ventilation duct 84h that communicates with the outside air is also connected to the cooking chamber 84. A fan 84i and an airtight damper 84j are disposed in the ventilation duct 84h. The airtight damper 84j is disposed upstream of the fan 84i. Therefore, by operating the fan 84i with the airtight damper 84j open, air can be forcibly exhausted from the cooking chamber 84 to the outside air.

[0049] To the air conditioner 85, a first air supply duct 85a communicated with the first fresh air intake port 14 and a second air supply duct 85b communicated with the second fresh air intake port 15 are connected.

[0050] An airtight damper 85c capable of blocking the flow path is disposed in the first air supply duct 85a downstream of the first fresh air intake 14. A gas detector 85d for detecting alternative fuel gas is disposed in the first air supply duct 85a upstream of the airtight damper 85c. A circulation duct 85g communicating with the cooking chamber 84 is connected to the first air supply duct 85a downstream of the airtight damper 85c. An airtight damper 85h is disposed in the circulation duct 85g. The circulation duct 85g may be connected to the second air supply duct 85b.

[0051] An airtight damper 85e capable of blocking the flow path is disposed in the second air supply duct 85b downstream of the second fresh air intake 15. Also, a gas detector 85f for detecting the alternative fuel gas is disposed in the second air supply duct 85b upstream of the airtight damper 85e.

[0052] 3, the number of first fresh air intakes 14 provided corresponds to the number of first air supply ducts 83c, 84a, and 85a. Alternatively, the first fresh air intakes 14 may be combined into one common inlet, and branched off from the first fresh air intake 14 to each of the first air supply ducts 83c, 84a, and 85a.

[0053] The airtight damper 83e is configured to shut off the flow path when the gas detector 83f detects that the alternative fuel gas concentration exceeds a predetermined threshold. For example, when the alternative fuel is ammonia, the threshold of the gas detector 83f can be set arbitrarily within the range of 0.5 to 2.0 ppm.

[0054] The threshold value of the gas detector 83f may be set to two levels: low concentration (caution level) and high concentration (danger level). For example, if the alternative fuel is ammonia, the low concentration is set to about 0.5 ppm and the high concentration is set to about 25.0 ppm. Note that a commercially available product compatible with alternative fuels can be used as the gas detector 83f.

[0055] Similarly, the airtight dampers 83g, 84d, 84f, 85c, and 85e are configured to block the flow path when the corresponding gas detectors 83h, 84e, 84g, 85d, and 85f detect an alternative fuel gas concentration that exceeds a predetermined threshold.

[0056] As described above, there are two fresh air intakes that take fresh air from the outside into the accommodation space 8: the first fresh air intake 14 located on the port side and the second fresh air intake 15 located on the starboard side. Hereinafter, in this embodiment, a case where the alternative fuel gas concentration detected by the gas detectors 83f, 83h, 84e, 84g, 85d, and 85f is below the threshold value will be referred to as "normal operation."

[0057] During normal operation, only one of the two fresh air intakes is used. Figure 3 shows a case where the first fresh air intake 14 is used and the second fresh air intake 15 is not used. It is possible to arbitrarily set which fresh air intake to use.

[0058] As shown in Figure 3, when the first fresh air intake 14 is used, the airtight dampers 83e, 84d, and 85c arranged in the first air supply ducts 83c, 84a, and 85a are set to the open state (OPEN), and the airtight dampers 83g, 84f, and 85e arranged in the second air supply ducts 83d, 84b, and 85b are set to the closed state (CLOSE).

[0059] Also, during normal operation, the airtight damper 81c of the air supply duct 81b, the airtight damper 82c of the ventilation duct 82a, and the airtight damper 84j of the ventilation duct 84h are set to an open state (OPEN), and the airtight damper 85h of the circulation duct 85g is set to a closed state (CLOSE).

[0060] Therefore, fresh air taken in through the first fresh air intake 14 is supplied to each room of the natural exhaust section 81 and the mechanical exhaust section via the mixing chamber 83b and the air conditioner 83a. In addition, the fresh air taken in through the first fresh air intake 14 can be supplied directly to the cooking room 84, and can also be supplied to the cooking room 84 via the air conditioner 85.

[0061] Next, normal operation using the second fresh air intake 15 will be described with reference to Fig. 4. When the second fresh air intake 15 is used, as shown in Fig. 4, the airtight dampers 83g, 84f, and 85e arranged in the second air supply ducts 83d, 84b, and 85b are set to an open state (OPEN), and the airtight dampers 83e, 84d, and 85c arranged in the first air supply ducts 83c, 84a, and 85a are set to a closed state (CLOSE).

[0062] Also, during normal operation, the airtight damper 81c of the air supply duct 81b, the airtight damper 82c of the ventilation duct 82a, and the airtight damper 84j of the ventilation duct 84h are set to an open state (OPEN), and the airtight damper 85h of the circulation duct 85g is set to a closed state (CLOSE).

[0063] Therefore, fresh air taken in through the second fresh air intake 15 is supplied to each room of the natural exhaust section 81 and the mechanical exhaust section via the mixing chamber 83b and the air conditioner 83a. In addition, the fresh air taken in through the second fresh air intake 15 can be supplied directly to the cooking room 84, and can also be supplied to the cooking room 84 via the air conditioner 85.

[0064] In this embodiment, since there are two systems of fresh air intakes, even if an alternative fuel gas concentration equal to or greater than a predetermined threshold is detected while the first fresh air intake 14 is in use as shown in Fig. 3, if an alternative fuel gas concentration equal to or greater than the predetermined threshold is not detected on the side of the second fresh air intake 15, it is possible to switch to using the second fresh air intake 15 as shown in Fig. 4. Even when the second fresh air intake 15 is in use, it is possible to switch to the first fresh air intake 14 in the same way.

[0065] If the first fresh air intake 14 leading to the mixing chamber 83b, the first fresh air intake 14 leading to the cooking room 84, and the first fresh air intake 14 leading to the air conditioner 85 are each arranged independently, they may be individually switched to the second fresh air intake 15 depending on the output of a gas detector arranged in each duct.

[0066] Furthermore, even if the first fresh air intake 14 leading to the mixing chamber 83b, the first fresh air intake 14 leading to the cooking room 84, and the first fresh air intake 14 leading to the air conditioner 85 are each arranged independently, all fresh air intakes may be switched to the second fresh air intake 15 when any one of the gas detectors arranged in each duct detects an alternative fuel gas concentration above a predetermined threshold.

[0067] By completely switching the fresh air intake from the first fresh air intake 14 to the second fresh air intake 15 in this way, if a low concentration (caution level) of alternative fuel gas is detected on the port side, it is possible to prevent the mixing of alternative fuel gas from the first fresh air intake 14 on the port side.

[0068] Next, a case where the air conditioners 83a, 85 are operated in the recirculating air mode will be described with reference to Figure 5. When alternative fuel gas equal to or greater than a predetermined threshold is detected in both the first fresh air intake 14 and the second fresh air intake 15, the airtight dampers 83e, 84d, 85c arranged in the ducts of the first fresh air intake 14 are set to a closed state (CLOSE), and the airtight dampers 83g, 84f, 85e arranged in the ducts of the second fresh air intake 15 are also set to a closed state (CLOSE).

[0069] In addition, the airtight damper 81c arranged in the air supply duct 81b and the airtight damper 82c arranged in the ventilation duct 82a are set to a closed state (CLOSE), and the airtight damper 85h arranged in the circulation duct 85g is set to an open state (OPEN).

[0070] By setting the airtight dampers to open and close in this way, it is possible to stop the intake of fresh air from outside, stop the supply of fresh air to each room in the natural exhaust section 81, and circulate air between the air conditioner section 83 and the mechanical exhaust section 82, and between the air conditioner 85 and the kitchen 84. In other words, when all flow paths are blocked by the gas detector, the air conditioners 83a and 85 installed in the living area 8 operate using internal air circulation that does not take in outside air.

[0071] An output unit 81d that outputs an alert when a gas detector detects an alternative fuel gas concentration exceeding a predetermined threshold may be disposed on the entrance passage side of each room in the natural exhaust section 81. The output unit 81d outputs an alert when, for example, an airtight damper 81c disposed in the air supply duct 81b is closed. The output unit 81d may be a warning light, a monitor, or other device.

[0072] Next, a case where the operation of the air conditioners is stopped will be described with reference to Fig. 6. For example, if a high concentration (dangerous level) of the alternative fuel gas concentration is detected from any one of the gas detectors, the operation of the air conditioners 83a and 85 may be stopped. In this case, as shown in the figure, all airtight dampers are set to the closed state (CLOSE), and the operation of the air conditioners 83a and 85 is stopped.

[0073] With this setting, even if high concentrations (dangerous levels) of alternative fuel gas are taken in through the first fresh air intake 14 and the second fresh air intake 15, diffusion to the natural exhaust section 81, the mechanical exhaust section 82 and the cooking room 84 can be suppressed.

[0074] According to the alternative fuel ship 1 of this embodiment described above, since it is equipped with multiple fresh air intakes (for example, a first fresh air intake 14 and a second fresh air intake 15) that take in outside air into the living area 8, at least two systems of fresh air intakes can be arranged, and even if one fresh air intake cannot be used, the other fresh air intake can be used, and the mixing of alternative fuel gas into the living area 8 can be suppressed even when the facilities in the living area 8 are operating normally.

[0075] The present invention is not limited to the above-described embodiment, and various modifications are possible without departing from the spirit of the present invention. [Explanation of symbols]

[0076] 1 Alternative fuel ship 2 Alternative fuel tanks 3 Reliquefaction equipment 4 Alternative fuel engines 5. Generator 6 Fuel supply equipment 7. Bunker Station 8 Living area 9 Engine Room 10 Upper Deck 11 Chimney 12 Bent Post 13 Ventilation tube 14 First fresh air intake 15 Second fresh air intake 81 Natural Exhaust Section 81a Ventilation duct 81b Air supply duct 81c Airtight Damper 81d Output section 82 Mobile Exhaust Compartment 82a Ventilation duct 82b Fan 82c Airtight Damper 82d Circulation Duct 82e Air supply duct 83 Air Conditioner Section 83a Air conditioner 83b Mixing Chamber 83c First air supply duct 83d Second air supply duct 83e, 83g Airtight Damper 83f, 83h Gas detector 84 Galley 84a First air supply duct 84b Second air supply duct 84c Air supply duct 84d, 84f, 84j Airtight damper 84e, 84g Gas Detector 84h ventilation duct 84i Fan 85 Air conditioner 85a First air supply duct 85b Second air supply duct 85c, 85e, 85h Airtight Damper 85d, 85f gas detector 85g Circulation Duct

Claims

1. On alternative fuel ships that use alternative fuels, A plurality of fresh air intakes are provided to bring in fresh air from outside the ship to designated locations within the accommodation area. An alternative fuel ship characterized by:

2. 2. The alternative fuel vessel of claim 1, wherein at least one of the plurality of fresh air intakes is located on the port side and at least one of the plurality of fresh air intakes is located on the starboard side.

3. 2. The alternative fuel ship according to claim 1, further comprising an airtight damper arranged downstream of each of the plurality of fresh air intakes and capable of blocking a flow path.

4. The alternative fuel ship according to claim 3 , further comprising a gas detector disposed upstream of the airtight damper for detecting the alternative fuel gas.

5. 5. The alternative fuel ship according to claim 4, wherein the airtight damper is configured to block the flow path when the gas detector detects an alternative fuel gas concentration exceeding a predetermined threshold.

6. The alternative fuel ship described in claim 5, wherein the air conditioner installed in the accommodation area is configured to operate using internal air circulation that does not take in outside air, or to stop operating, when all flow paths are blocked by the gas detector.

7. 5. The alternative fuel ship as described in claim 4, wherein a room installed in the accommodation area and having a ventilation duct communicating with the outside air has an output unit that outputs an alert when the gas detector detects an alternative fuel gas concentration exceeding a predetermined threshold.

8. 2. The alternative fuel ship according to claim 1, wherein at least one of the plurality of fresh air intakes is located below an alternative fuel gas exhaust outlet installed on the deck.

9. The alternative fuel vessel of claim 1 , wherein at least one of the plurality of fresh air intakes is located aft of the accommodation area.

10. The alternative fuel ship of claim 1 , wherein the predetermined location is an air conditioner, an air conditioner mixing chamber, or a galley.

Images