Watercraft

Abstract

To provide a ship capable of increasing the capacity of a fuel tank while isolating an evacuation passage from a harmful range due to fuel leakage.SOLUTION: A ship includes a hull having a pair of broadsides, a fuel tank provided in the hull, an exposed deck provided in the hull and having an evacuation passage extending along the broadsides on an upper surface thereof, a bunkering deck provided above the evacuation passage, and a fuel tank disposed on the bunkering deck. A bunkering system includes a bunkering pipe that is connected to the outside of a hull to exchange fuel and is connected to a fuel tank, and a side partition wall that surrounds an evacuation passage from a ship width direction, in which the side partition wall includes a first side partition wall that surrounds the evacuation passage from the outside of the hull and a second side partition wall that surrounds the evacuation passage from a side opposite to the first side partition wall.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present disclosure relates to marine vessels. [Background technology]

[0002] Some ships carry liquefied gases such as ammonia as fuel for navigation or as cargo. For example, if liquefied ammonia is on board, if the liquefied ammonia leaks, it may vaporize and become ammonia gas, which may react with moisture in the air to form a mist that floats in the air.

[0003] For example, Patent Document 1 discloses a method for preventing ammonia gas leakage, in which the ammonia gas is absorbed in sprayed water to suppress the effects of ammonia gas inside the hull. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2022-37335 Summary of the Invention [Problem to be solved by the invention]

[0005] Meanwhile, ships have various measures in place to prepare for emergencies. For example, ships are equipped with evacuation routes that allow crew members to evacuate to superstructures, heliports, lifeboats, etc. in the event of an accident such as a fire. On the other hand, the evacuation route for occupants must be isolated from the harmful area affected by a liquefied gas leak. However, isolating the evacuation route from the harmful area caused by a fuel leak places restrictions on the placement of various intake and exhaust ports. As a result, the flexibility in installing the fuel tank is reduced, and there is a possibility that the tank capacity cannot be sufficiently secured. For this reason, a structure is required that can secure sufficient fuel tank capacity while isolating the evacuation route from the harmful area.

[0006] The present disclosure aims to provide a ship that can increase the capacity of a fuel tank while isolating an evacuation route from a harmful area caused by a fuel leak. [Means for solving the problem]

[0007] In order to solve the above problem, the ship disclosed herein comprises a hull having a pair of sides, a fuel tank provided within the hull, an exposed deck provided on the hull and having an evacuation passage formed on its upper surface extending along the sides, a bunkering deck provided above the evacuation passage, bunkering piping arranged on the bunkering deck and connected to the outside of the hull to allow fuel to be exchanged and connected to the fuel tank, and lateral bulkheads surrounding the evacuation passage from the width direction of the ship, the lateral bulkheads having a first lateral bulkhead surrounding the evacuation passage from the outside of the hull and a second lateral bulkhead surrounding the evacuation passage from the opposite side of the first lateral bulkhead. [Effects of the Invention]

[0008] According to the ship of the present disclosure, it is possible to provide a ship that can increase the capacity of the fuel tank while isolating the evacuation passage from the harmful area caused by fuel leakage. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a configuration diagram of a ship according to an embodiment of the present disclosure. [Figure 2] 1 is a vertical cross-sectional view of a vessel according to an embodiment of the present disclosure, taken along a line intersecting the hull centerline. FIG. [Figure 3] FIG. 1 is a horizontal cross-sectional view taken along the waterline of a ship according to a first embodiment of the present disclosure. [Figure 4] FIG. 10 is a horizontal cross-sectional view taken along the waterline of a ship according to a modified example of the first embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0010] A boat 1 according to an embodiment of the present disclosure will be described below with reference to Figures 1 to 4. Note that Figures 1 to 4 show important parts enlarged as appropriate, and therefore the size and positional relationship relative to the boat 1 as a whole may differ from the actual size and positional relationship.

[0011] First Embodiment A first embodiment of a vessel 1 according to the present disclosure will be described in detail below with reference to FIG.

[0012] <Overall configuration of the ship> In this embodiment, the ship 1 will be described as a cargo ship capable of carrying cargo such as containers. However, the type of ship 1 is not limited to a cargo ship. Examples of the type of ship 1 include carriers of liquefied gases such as liquefied natural gas (LNG), liquefied carbon dioxide, and liquefied ammonia, ferries, RORO ships (roll-on / roll-off ships), and PCTCs (pure car & truck carriers). As shown in FIG. 1 , the ship 1 of this embodiment includes a hull 10, a fuel tank 92, and a water supply unit 93.

[0013] <Hull> The hull 10 has a pair of side walls 11 that form its outer hull, a bottom wall 12, and an upper deck. The side walls 11 have a pair of side wall shells that form the port and starboard sides, respectively. The bottom wall 12 has a bottom wall shell that connects the side walls 11. In this embodiment, the upper surface of the upper deck facing upward in the vertical direction D1 is the exposed deck 13 that faces the outside. In the following, directions are defined as follows: The direction perpendicular to the vertical direction D1 is the horizontal direction. The horizontal direction in which the bow and stern are aligned is referred to as the fore-aft direction D2, and the horizontal direction in which the pair of side walls 11 face each other is referred to as the transverse direction D3. The fore-aft direction D2 and the transverse direction D3 are perpendicular to each other. An imaginary line passing through the center of the hull 10 in the transverse direction D3 may be referred to as the hull centerline (not shown).

[0014] The hull 10 has a fuel control room 20, a tank room 30, a bunker facility on the exposed deck 40, an engine room 90, and a superstructure 91. The hull 10 also has an evacuation passage 60. Specifically, the evacuation passage 60 is formed on the exposed deck 13. Two evacuation passages 60 extend along the ship's side 11. In other words, the upper surface of the exposed deck 13 is formed with an evacuation passage 60 extending along the ship's side 11. The evacuation passage 60 is formed to allow access to a lifeboat 97 installed near the bow. The lifeboat 97 is used when crew members of the ship 1 escape overboard. The evacuation passage 60 allows crew members of the ship 1 to smoothly move to the lifeboat 97. Note that the positional relationship between the engine room 90, the superstructure 91, and the lifeboat 97 in the bow-stern direction D2 as shown in FIG. 1 is an example and is not limited to this.

[0015] <Fuel adjustment room> The fuel conditioning chamber 20 houses a fuel conditioning device (not shown) that conditions the fuel and sends it to fuel-consuming devices such as the main engine. Examples of fuel conditioning devices housed in the fuel conditioning chamber 20 include a compressor and a carburetor. The fuel conditioning chamber 20 is also a managed room that can properly treat leaked fuel without letting it leak into the surrounding area, for example, in the event of a fuel leak within the room. The fuel conditioning chamber 20 is provided with, for example, a heat exchanger and sensors for monitoring and controlling various parameters.

[0016] In the present embodiment, the fuel regulation chamber 20 is formed to penetrate the exposed deck 13 in the vertical direction D1. That is, in the present embodiment, at least a portion of the fuel regulation chamber 20 is located inside the hull 10. The fuel regulation chamber 20 has a bottom wall, a ceiling wall, and a peripheral wall 21. The peripheral wall 21 rises from the bottom wall to the ceiling wall. In addition, the peripheral wall 21 in this embodiment is connected to the exposed deck 13 around its entire periphery. In the following description, the portion of the peripheral wall 21 of the fuel regulation chamber 20 that extends in the fore-aft direction D2 is referred to as the side wall 22. The fuel regulation chamber 20 is located above the fuel tank 92 in the vertical direction D1.

[0017] <Tank Room> The tank chamber 30 is a watertight compartment that houses the fuel tank 92. The tank chamber 30 is formed inside the hull 10. The tank chamber 30 is located below the fuel adjustment chamber 20 in the vertical direction D1. The tank chamber 30 extends in the bow-stern direction D2 and the width direction D3.

[0018] <Fuel tank> The fuel tank 92 is capable of storing fuel. The fuel tank 92 of this embodiment is capable of storing ammonia as fuel. However, the fuel is not limited to this, and the fuel tank 92 may be capable of storing a fuel other than ammonia. One example of a fuel is methanol. The fuel tank 92 is disposed inside the tank chamber 30. That is, the fuel tank 92 is provided inside the hull 10. The fuel tank 92 is also disposed below the fuel adjustment chamber 20 in the vertical direction D1. The fuel tank 92 is supported by a saddle (not shown) provided inside the tank chamber 30. The fuel tank 92 may be formed by part of the hull 10.

[0019] <Bunker facilities on exposed deck> The exposed deck bunker equipment 40 is formed above the exposed deck 13. The exposed deck bunker equipment 40 is located near the fuel preparation room 20. The exposed deck bunker equipment 40 of this embodiment extends upward from the exposed deck 13. The above-mentioned evacuation passage 60 penetrates the lower part of this exposed deck bunker equipment 40 in the fore-and-aft direction D2. As shown in the cross-sectional views of Figures 2 and 3, a pair of exposed deck bunker equipments 40 of this embodiment are formed in the transverse direction D3 with the fuel preparation room 20 as the reference. However, this is not limited to this. For example, the exposed deck bunker equipment 40 may be formed only on one side of the transverse direction D3 with the fuel preparation room 20 as the reference. Furthermore, the exposed deck bunker equipment 40 may be formed at multiple locations in the fore-and-aft direction D2. The exposed deck bunker equipment 40 has side bulkheads 41, a bunkering deck 46, bunkering piping 51, front and rear bulkheads 70, and an upper bulkhead 80.

[0020] <Side bulkhead> The side bulkheads 41 are formed so as to surround the evacuation passage 60 from the ship's width direction D3. A portion of the side bulkheads 41 is formed in contact with the exposed deck 13. The boundary between the portion of the evacuation passage 60 that is surrounded by the side bulkheads 41 and the portion that is not surrounded by the side bulkheads 41 will be referred to as an entrance / exit 61 below. The side bulkheads 41 have a first side bulkhead 42 and a second side bulkhead 45.

[0021] The first lateral bulkhead 42 is formed so as to surround the evacuation passage 60 formed on the exposed deck 13 from the exterior side of the hull 10, in other words, from the opposite side of the hull centerline in the transverse direction D3 (hereinafter simply referred to as the outside in the transverse direction D3). The first lateral bulkhead 42 in this embodiment has a first portion 43 and a second portion 44.

[0022] The first portion 43 is connected to the weather deck 13. The first portion 43 extends upward from the weather deck 13 in the vertical direction D1 and in the fore-and-aft direction D2. The first portion 43 is a plate-shaped member having a rectangular shape when viewed from the transverse direction D3. The first portion 43 faces the side wall 22 of the fuel conditioning chamber 20 in the fore-and-aft direction D2. In other words, the first portion 43 extends so as not to protrude further toward the bow or the stern in the fore-and-aft direction D2 than the fuel conditioning chamber 20 when viewed from the outside in the transverse direction D3. In this embodiment, the first portion 43 is connected to the weather deck 13 without any gaps by welding or the like. The first portion 43 has another end portion located on the opposite side to the portion connected to the weather deck 13 in the vertical direction D1. The other end portion of the first portion 43 is connected to the second portion 44.

[0023] The second portion 44 extends from the other end of the first portion 43 in the fore-and-aft direction D2 and toward the inside of the hull 10. Here, the inside of the hull 10 refers to the side closer to the hull centerline in the ship's width direction D3. The second portion 44 is a plate-shaped member having a rectangular shape when viewed from the vertical direction D1. The second portion 44 extends in the fore-and-aft direction D2, similar to the first portion 43. The second portion 44 is disposed so as to face the exposed deck 13. In this embodiment, a case is illustrated in which the length of the first portion 43 in the fore-and-aft direction D2 and the length of the second portion 44 in the fore-and-aft direction D2 are the same.

[0024] The second portion 44 extends so as to connect the first portion 43 and the second side bulkhead 45 in the ship's transverse direction D3. The second portion 44 is connected to the first portion 43 without any gaps by welding or the like. Although the case where the first portion 43 and the second portion 44 of the first side bulkhead 42 are connected by welding or the like has been described, the first portion 43 and the second portion 44 are not limited to being connected by welding or the like.

[0025] The second side bulkhead 45 is formed to surround the evacuation passage 60 from the side opposite the first portion 43 of the first side bulkhead 42. In other words, the evacuation passage 60 is surrounded by the first side bulkhead 42 and the second side bulkhead 45 from the port side, starboard side, and above. The second side bulkhead 45 in this embodiment is also the side wall 22 of the fuel adjustment chamber 20. The side wall 22 in this embodiment is connected to the second portion 44 of the first side bulkhead 42 by welding or the like.

[0026] The evacuation passage 60 in this embodiment passes through a space enclosed by the side bulkheads 41 and the exposed deck 13. The side bulkheads 41 and the exposed deck 13 are connected without any gaps. Therefore, outside air does not flow into the space enclosed by the side bulkheads 41 and the exposed deck 13 from above and below in the vertical direction D1 or from inside and outside in the width direction D3 of the ship.

[0027] <Bunkering Deck> The bunkering deck 46 is provided above the evacuation passage 60. Specifically, the bunkering deck 46 is disposed above the second section 44 in the vertical direction D1. The bunkering deck 46 of this embodiment is installed above the second section 44. The bunkering deck 46 is a rectangular plate-like member extending in the bow-stern direction D2 and the width direction D3. The outline of the bunkering deck 46 of this embodiment viewed from above has the same shape as the outline of the second section 44 of the first side bulkhead 42 viewed from above. Furthermore, the position of the outer edge of the bunkering deck 46 and the position of the outer edge of the second section 44 when viewed from above coincide. Furthermore, the bunkering deck 46 of this embodiment is connected to the side wall 22 of the fuel adjustment room 20 by welding or the like. A bunkering station 50 is formed on the upper surface of the bunkering deck 46. In this embodiment, crew members and the like can enter the bunkering deck 46 via the exposed deck 13 and the like.

[0028] <Bunkering piping> The bunkering pipe 51 is connected to the outside of the hull 10 to enable fuel exchange. The bunkering pipe 51 is connected to the fuel tank 92. Although not shown in the drawings, the bunkering pipe 51 is connected to the fuel tank 92 through the fuel regulation chamber 20. The bunkering pipe 51 is arranged to penetrate the side wall 22 of the fuel regulation chamber 20. The bunkering pipe 51 is arranged on the bunkering deck 46. Specifically, the bunkering pipe 51 includes a manifold section and a piping section. The manifold section has a detachable supply port for a hose outside the hull 10 for supplying fuel. The piping section connects the manifold section to the fuel tank 92. There is no limit to the number of manifold sections and piping sections that can be arranged. Furthermore, the bunkering pipe 51 is not limited to being arranged to penetrate the side wall 22 of the fuel regulation chamber 20. For example, it may be arranged to penetrate the peripheral wall 21 of the fuel regulation chamber 20.

[0029] In the bunkering station 50 of this embodiment, the manifold portion of the bunkering pipe 51 and a portion of the pipe portion that is closer to the manifold portion are arranged. In other words, at least the manifold portion of the bunkering pipe 51 is arranged in the bunkering station 50. The bunkering station 50 may be provided with a drip tray that can receive liquid fuel dripping from the bunkering pipe 51.

[0030] In this embodiment, a certain section centered on the manifold portion of the bunkering pipe 51 is defined as a harmful range (toxic range). In other words, a spherical range with a predetermined radius centered on the manifold portion is defined as the toxic range. This is because it is assumed that fuel may leak from the manifold portion.

[0031] <Anteroposterior bulkhead> The fore and aft bulkheads 70 are provided on the bunkering deck 46. A pair of the fore and aft bulkheads 70 are provided to surround the bunkering piping 51 from both sides in the fore-stern direction D2. Specifically, the pair of fore and aft bulkheads 70 surround at least the bunkering station 50 in which the manifold section is arranged from both sides in the fore-stern direction D2. When viewed from above, the fore and aft bulkheads 70 in this embodiment are located closer to the manifold section than the end of the bunkering deck 46 in the fore-stern direction D2.

[0032] The fore and aft bulkheads 70 are rectangular plate-like members extending in the vertical direction D1 and the ship's width direction D3. The fore and aft bulkheads 70 are connected to the bunkering deck 46 by welding or the like. The upper ends of the fore and aft bulkheads 70 are connected to the upper bulkhead 80 by welding or the like. The fore and aft bulkheads 70 are connected to the side walls 22 of the fuel adjustment room 20 by welding or the like. In this embodiment, the length of the fore and aft bulkheads 70 in the ship's width direction D3 is the same as the length of the bunkering deck 46 in the ship's width direction D3. In other words, the fore and aft bulkheads 70 are formed so as to cross the bunkering deck 46 in the ship's width direction D3 and block the bunkering station 50 from both sides in the fore-and-stern direction D2.

[0033] The front and rear bulkheads 70 of this embodiment have an opening / closing section 71. The opening / closing section 71 is displaceable between an open position that allows passage of crew members and the like in the fore-aft direction D2 and a closed position that restricts passage in the fore-aft direction D2. When the opening / closing section 71 is in the open position, the space in which the bunkering piping 51 is arranged, i.e., the bunkering station 50, and an external space adjacent to the bunkering station 50 in the fore-aft direction D2 are in a state of communication via the opening / closing section 71. On the other hand, when the opening / closing section 71 is in the closed position, the space in which the bunkering piping 51 is arranged and an external space adjacent to the space in the fore-aft direction D2 are in a non-communicative state, i.e., not in communication via the opening / closing section 71. In other words, the opening / closing section 71 is switchable between communication and non-communication between the space in which the bunkering piping 51 is arranged and the external space adjacent to the space in the fore-aft direction D2. The opening / closing unit 71 may be, for example, a single-wing door, but the opening / closing unit 71 is not limited to a single-wing door.

[0034] <Upper bulkhead> The upper bulkhead 80 covers the bunkering piping 51 from above. In other words, the upper bulkhead 80 forms the ceiling of the bunkering station 50. In this embodiment, the upper bulkhead 80 also serves as the ceiling wall of the fuel adjustment room 20. The upper bulkhead 80 is a rectangular plate-like member that extends in the bow-stern direction D2 and the ship's width direction D3. Specifically, the outline of the upper bulkhead 80 when viewed from above matches the combined outline of the fuel adjustment room 20 and the bunkering deck 46 when viewed from above.

[0035] The upper partition wall 80 has an upper surface facing upward that allows cargo or the like to be placed on it. The upper partition wall 80 is connected to the peripheral wall 21 of the fuel regulation chamber 20 by welding or the like. The upper partition wall 80 is also connected to the front and rear partition walls 70 by welding or the like. Although the above description has been given using an example in which the upper partition wall 80 also serves as the ceiling wall of the fuel regulation chamber 20, the present invention is not limited to this configuration. For example, the upper partition wall 80 and the ceiling wall of the fuel regulation chamber 20 may be separate members.

[0036] <Engine Room> The engine room 90 is formed inside the hull 10. The engine room 90 houses the main engine and the like. The main engine in this embodiment is an engine (internal combustion engine) that burns ammonia stored in a fuel tank 92 as fuel. The main engine converts thermal energy from the combustion of ammonia into rotational energy that drives a propeller arranged on the hull 10. The engine room 90 is provided below the exposed deck 13. Furthermore, the engine room 90 in this embodiment is formed on the stern side of the above-mentioned exposed deck bunker facility 40. The engine room 90 is formed so that, for example, after crew members in the engine room 90 go out onto the exposed deck 13 to evacuate, they can smoothly access the evacuation passage 60 provided on the exposed deck 13.

[0037] <Superstructure> The superstructure 91 is formed on the exposed deck 13. The superstructure 91 provided on the ship 1 of this embodiment is formed closer to the bow than the exposed deck bunker facility 40. The superstructure 91 has accommodation areas, a bridge, etc. inside it. The superstructure 91 is formed so that crew members and others inside the superstructure 91 can smoothly access the evacuation passage 60 provided on the exposed deck 13 after going out onto the upper surface of the exposed deck 13 to evacuate.

[0038] <Water supply section> The water supply unit 93 is capable of spraying water to a desired location. For example, the water supply unit 93 is capable of spraying water stored in a fresh water tank or the like provided in the hull 10 at least around the periphery of the bunkering pipe 51. In the event of a fuel leak, the water supply unit 93 suppresses the diffusion of vaporized fuel by spraying water. The water supply unit 93 of this embodiment is provided at least vertically above the bunkering station 50 and is capable of spraying water downward. Note that the direction in which the water supply unit 93 sprays water is not limited to the above direction.

[0039] The water supply unit 93 of this embodiment has a first water supply unit 94 , a second water supply unit 95 , and a third water supply unit 96 . The first water supply unit 94 is arranged along the front and rear bulkheads 70. That is, the first water supply unit 94 extends from the side wall 22 of the fuel adjustment chamber 20 toward the outside in the ship's width direction D3. The first water supply unit 94 is capable of spraying a shower of water so as to cover the opening and closing unit 71 from the fore-and-aft direction D2. In this embodiment, the first water supply unit 94 is arranged outside the bunkering station 50, but is not limited to this arrangement. The first water supply unit 94 may be arranged inside the bunkering station 50, or may be arranged both inside and outside the bunkering station 50.

[0040] The second water supply unit 95 sprays water so as to cover the bunkering piping 51 provided on the bunkering deck 46 from the ship's transverse direction D3. In this embodiment, the second water supply unit 95 is arranged so as to sandwich the bunkering station 50 together with the fuel adjustment room 20 from the ship's transverse direction D3. Furthermore, the second water supply unit 95 is arranged so as to connect the pair of front and rear bulkheads 70 in the fore-aft direction D2. The second water supply unit 95 is capable of spraying water in a shower-like manner so as to cover the bunkering station 50 from the outside in the ship's transverse direction D3. In other words, the second water supply unit 95 prevents the vaporized fuel from diffusing from the bunkering station 50 toward the outside in the ship's transverse direction D3.

[0041] The third water supply unit 96 is arranged so as to cover the entrance 61 of the evacuation passage 60. In other words, the third water supply unit 96 is arranged along the entrance 61 of the evacuation passage 60. The third water supply unit 96 is capable of spraying water in a shower-like manner so as to cover the entrance 61 of the evacuation passage 60. In other words, the third water supply unit 96 prevents vaporized fuel from flowing from the entrance 61 into the space vertically below the bunkering deck 46.

[0042] <Action and effect> The ship 1 in the above embodiment is provided with a bunkering deck 46 above the exposed deck 13. A bunkering piping 51 is arranged on the bunkering deck 46. An evacuation passage 60 is formed on the exposed deck 13. The bunkering deck 46 is arranged vertically above a part of the evacuation passage 60. Furthermore, the evacuation passage 60 located vertically below the bunkering deck 46 is surrounded by the side bulkheads 41 in the ship's transverse direction D3. In other words, the evacuation passage 60 located vertically below the bunkering deck 46 is covered in the vertical direction and in the ship's transverse direction D3. Therefore, the evacuation passage 60 that passes vertically below the bunkering deck 46 can be isolated from the space around the bunkering piping 51 arranged on the bunkering deck 46, which could be a harmful area.

[0043] Furthermore, according to this embodiment, the bunkering piping 51 is provided above the exposed deck 13. Therefore, the evacuation passage 60 can be isolated from the harmful area without providing the bunkering piping 51 below the exposed deck 13. This makes it possible to prevent a decrease in the degree of freedom in installing the fuel tank 92 located below the exposed deck 13. Therefore, the capacity of the fuel tank 92 can be increased. Furthermore, the above-mentioned effects can be achieved while providing the evacuation passage 60 on the upper surface of the exposed deck 13. In other words, the above-mentioned effects can be achieved while making it easy for crew members to evacuate.

[0044] Furthermore, according to this embodiment, the bunkering piping 51 arranged on the bunkering deck 46 is surrounded on both sides in the bow-stern direction D2 by the fore-and-aft bulkheads 70. The fore-and-aft bulkheads 70 also have opening / closing sections 71. The opening / closing sections 71 can be switched between an open state, which allows crew members and the like to pass through, and a closed state, which is sealed and prevents crew members and the like from passing through. This prevents vaporized fuel from flowing out in the bow-stern direction D2 from the space on the bunkering deck 46 where the bunkering piping 51 is arranged, even if fuel leaks from the bunkering piping 51. This prevents vaporized fuel from reaching the evacuation passage 60 located near the bunkering deck 46. Furthermore, since the opening / closing sections 71 are provided on the fore-and-aft bulkheads 70, crew members can easily access the space on the bunkering deck 46 where the bunkering piping 51 is arranged. This prevents vaporized fuel from reaching the evacuation passage 60 while ensuring access to the space where the bunkering piping 51 is arranged.

[0045] Furthermore, according to this embodiment, the bunkering pipe 51 is covered from above by the upper bulkhead 80. Therefore, even if fuel leaks from the bunkering pipe 51, it is possible to prevent the vaporized fuel from spreading upward from the space on the bunkering deck 46 where the bunkering pipe 51 is located. Furthermore, cargo and the like can be placed on the upper surface of the upper bulkhead 80 facing upward. This allows the area above the area where the bunkering station 50 is formed to be effectively used as a loading space for cargo and the like. Therefore, the loading capacity of the ship 1 can be increased.

[0046] Furthermore, the ship 1 according to this embodiment uses ammonia as fuel. In the unlikely event that ammonia leaks from the bunkering piping 51 in this ship 1, there is a possibility that the ammonia gas will diffuse to the surrounding area. In the ship 1 according to this embodiment, a water supply unit 93 is provided around the bunkering piping 51 arranged on the bunkering deck 46, and is capable of spraying water around the bunkering piping 51. Therefore, by spraying water from the water supply unit 93, ammonia gas contained in the air can be absorbed into the water. Therefore, it is possible to prevent ammonia that has leaked on the bunkering deck 46 from spreading beyond the water supply unit 93. As a result, it is possible to further prevent the leaked ammonia from reaching the evacuation passage 60.

[0047] The first water supply unit 94 in the above embodiment is arranged along the fore-and-aft bulkheads 70. Therefore, when the opening / closing unit 71 is operated, water can be sprayed to the locations that communicate in the bow-stern direction D2. Therefore, even if the opening / closing unit 71 is operated in the event of leakage from the bunkering piping 51 arranged on the bunkering deck 46, the diffusion of ammonia in the bow-stern direction D2 can be suppressed. In other words, when ammonia leaks from the bunkering piping 51, crew members and the like can pass through the opening / closing unit 71 while suppressing the diffusion of ammonia. This configuration can improve the maintainability of the ship 1 in an emergency.

[0048] The second water supply unit 95 in the above embodiment is arranged to cover the bunkering piping 51 arranged on the bunkering deck 46 from the exterior side of the hull 10, i.e., from the outside in the ship's transverse direction D3. Therefore, even if fuel leaks from the bunkering piping 51, it is possible to prevent vaporized fuel from flowing out from the space on the bunkering deck 46 where the bunkering piping 51 is arranged to the outside in the ship's transverse direction D3. Furthermore, when water is not being sprayed, the space on the bunkering deck 46 where the bunkering piping 51 is arranged is open to the outside of the hull 10, i.e., to the outside in the ship's transverse direction D3, which makes it easy to connect the bunkering piping 51 to external piping, etc. of the hull 10. In other words, fuel can be easily supplied from outside the ship.

[0049] The third water supply unit 96 in the above embodiment is arranged so as to cover the entrance / exit 61. This allows the evacuation passage 60, which is located vertically below the bunkering station 50, to be surrounded by the side bulkhead 41, the bunkering deck 46, and the third water supply unit 96. Therefore, it is possible to prevent ammonia from flowing from the entrance / exit 61 into the space between the bunkering deck 46 and the exposed deck 13.

[0050] <Modification of the first embodiment> Next, a modified example of the first embodiment will be described with reference to Fig. 4. In the modified example of the first embodiment, the same components as those in the first embodiment will be denoted by the same reference numerals, and detailed description thereof will be omitted.

[0051] The ship 1A according to the modification of the first embodiment differs from the first embodiment in the configuration of the exposed deck bunker system 40A. The ship 1A according to the modification of the first embodiment also differs from the first embodiment in the configuration of the side bulkheads 41 and in the absence of a water supply unit 93. The exposed deck bunker equipment 40A relating to a modified example of the first embodiment has a side bulkhead 41A, a bunkering deck 46, bunkering piping 51, front and rear bulkheads 70, and an upper bulkhead 80.

[0052] The side bulkheads 41A, like the side bulkheads 41 of the first embodiment, surround the evacuation passage 60 from the ship's transverse direction D3. Specifically, the side bulkheads 41A partition both sides, in the ship's transverse direction D3, of a part of the evacuation passage 60A that is provided in the vicinity of the space on the bunkering deck 46 where the bunkering piping 51 is arranged.

[0053] The side bulkhead 41A has a first side bulkhead 42A and a second side bulkhead 45A. Similar to the first side bulkhead 42 of the first embodiment, the first side bulkhead 42A surrounds a portion of the evacuation passage 60A from the outside in the ship's transverse direction D3. That is, the first side bulkhead 42A is formed to surround the evacuation passage 60A from at least the side opposite the hull centerline in the ship's transverse direction D3.

[0054] The first side bulkhead 42A has a first portion 43A and a second portion 44A, similar to the first side bulkhead 42 of the first embodiment. The first portion 43A extends upward in the vertical direction D1 and in the fore-and-aft direction D2 from the weather deck 13. The first portion 43A is a plate-like member having a rectangular shape when viewed in the ship's transverse direction D3. The second portion 44A extends in the ship's transverse direction D3 from the upper edge of the first portion 43A toward the hull centerline.

[0055] The second portion 44A is a plate-like member having a rectangular shape when viewed in the vertical direction D1. In the modification of the first embodiment, the length in the fore-aft direction D2 of the first portion 43A and the length in the fore-aft direction D2 of the second portion 44A are illustrated as being the same. Furthermore, in the modification of this embodiment, the length in the transverse direction D3 of the first side bulkhead 42A is the same as the length in the transverse direction D3 of the second side bulkhead 45A described below.

[0056] The second side bulkhead 45A is formed to surround a portion of the evacuation passage 60A from the side opposite the first portion 43A of the first side bulkhead 42A. In other words, the second side bulkhead 45A is disposed opposite the first portion 43A with the evacuation passage 60A sandwiched therebetween. The second side bulkhead 45A is a rectangular plate-shaped member as viewed in the ship's beam direction D3, similar to the first portion 43A. The middle portion of the second side bulkhead 45A in the fore-aft direction D2 also serves as the side wall 22 of the fuel adjustment chamber 20.

[0057] The length of each of the first side bulkhead 42A and the second side bulkhead 45A in the fore-aft direction D2 is longer than the length of the bunkering deck 46 in the fore-aft direction D2. Furthermore, in this modified example, the length of each of the first side bulkhead 42A and the second side bulkhead 45A in the fore-aft direction D2 is longer than the length of the fuel conditioning chamber 20 in the fore-aft direction D2. The first side bulkhead 42A and the second side bulkhead 45A extend forward of the bunkering deck 46 and toward the stern of the bunkering deck 46, respectively. In other words, the distance in the fore-aft direction D2 between the manifold unit and the entrance 61A in this modified example is longer than the distance in the fore-aft direction D2 between the manifold unit and the entrance 61 in the first embodiment. In the modified example of this embodiment, an entrance / exit 61A of an evacuation passage 60A is arranged so as to be outside a harmful range (toxic range) which is a certain section centered on the manifold portion of the bunkering pipe 51.

[0058] <Action and effect> In the ship 1A according to the modified example of the first embodiment, the side bulkheads 41A are formed to extend in the bow-stern direction D2 beyond the bunkering deck 46. This allows the entrance / exit 61A of the evacuation passage 60A to be located outside the harmful range (toxic range), which is a certain section centered on the manifold portion of the bunkering piping 51. Therefore, it is possible to isolate the evacuation passage 60A, which is provided below the bunkering deck 46, from the harmful range without spraying water from the water supply unit 93.

[0059] <Other embodiments> The above describes in detail the embodiments of the present disclosure with reference to the drawings, but the specific configuration is not limited to this embodiment, and design changes and the like are also included within the scope that does not deviate from the gist of the present disclosure.

[0060] For example, the first embodiment and the modified example of the first embodiment may be combined as appropriate.

[0061] Furthermore, the second portions 44, 44A according to one embodiment may not be provided. That is, the bunkering deck 46 may also serve as the second portions 44, 44A, and the first portions 43, 43A and the bunkering deck 46 may be connected.

[0062] Furthermore, the second portions 44, 44A, the bunkering deck 46, and the upper bulkhead 80 according to one embodiment may be configured to protrude further outward from the hull 10 than the first portions 43, 43A.

[0063] Furthermore, the side partitions 41, 41A according to one embodiment may be replaced by providing a water supply unit 93. That is, both or one of the first side partitions 42, 42A and the second side partitions 45, 45A may be omitted, and the water supply unit 93 may be provided instead. In this manner, the side partitions 41, 41A can absorb ammonia by spraying water to suppress the harmful area without blocking the periphery of the evacuation passages 60, 60A with a partition. Furthermore, the side partitions 41, 41A do not have to be entirely replaced by the water supply unit 93, and the area where the plate-like member is provided and the area where the water supply unit 93 is provided may be combined.

[0064] Furthermore, the first water supply unit 94 according to one embodiment may be arranged only along the opening / closing unit 71. That is, the first water supply unit 94 does not have to be arranged along the entire front / rear partition 70, but may be arranged only at the location where the opening / closing unit 71 is present. According to this arrangement, the opening / closing unit 71 can be operated while limiting the range in which water is sprayed and the harmful range of ammonia. Furthermore, the position of the first water supply unit 94 according to one embodiment may be adjusted as appropriate based on the distance between the harmful range and the entrances 61, 61A of the evacuation passages 60, 60A. As in the modified example of the first embodiment, the first water supply unit 94 may not be provided.

[0065] Furthermore, the second water supply unit 95 according to one embodiment may be disposed wider than the fore-aft bulkheads 70 in the fore-aft direction D2. Furthermore, the second water supply unit 95 according to one embodiment does not necessarily have to be disposed so as to connect the pair of fore-aft bulkheads 70 in the fore-aft direction D2. The position of the second water supply unit 95 may be adjusted appropriately based on the distance between the harmful range and the entrances 61, 61A of the evacuation passages 60, 60A. As in the modified example of the first embodiment, the second water supply unit 95 may not be disposed.

[0066] Furthermore, the third water supply section 96 according to the first embodiment does not necessarily have to be provided.

[0067] <Additional Notes> The ships 1 and 1A described in the respective embodiments can be understood, for example, as follows.

[0068] (1) The vessel 1, 1A according to the first aspect comprises a hull 10 having a pair of sides 11, a fuel tank 92 provided within the hull 10, an exposed deck 13 provided on the hull 10 and having evacuation passages 60, 60A formed on the upper surface thereof and extending along the sides 11, a bunkering deck 46 provided above the evacuation passages 60, 60A, and a bunkering deck 46 arranged on the bunkering deck 46 and connected to the outside of the hull 10 for the storage of fuel and The hull 10 is provided with a bunkering pipe 51 that can be removed and is connected to the fuel tank 92, and lateral bulkheads 41, 41A that surround the evacuation passages 60, 60A from the ship's width direction D3, and the lateral bulkheads 41, 41A have first lateral bulkheads 42, 42A that surround the evacuation passages 60, 60A from the outside of the hull 10, and second lateral bulkheads 45, 45A that surround the evacuation passages 60, 60A from the opposite side of the first lateral bulkheads 42, 42A.

[0069] According to the above configuration, a bunkering deck 46 is provided above the exposed deck 13. A bunkering piping 51 is arranged on the bunkering deck 46. Evacuation passages 60, 60A are formed on the exposed deck 13. The bunkering deck 46 is arranged vertically above a portion of the evacuation passages 60, 60A. In addition, the evacuation passages 60, 60A located vertically below the bunkering deck 46 are surrounded by the side bulkheads 41, 41A in the ship's beam direction D3. Therefore, the evacuation passages 60, 60A that pass vertically below the bunkering deck 46 can be isolated from the space around the bunkering piping 51 arranged on the bunkering deck 46, which could be a harmful area.

[0070] Furthermore, with this configuration, the bunkering piping 51 is provided above the exposed deck 13. Therefore, the evacuation passages 60, 60A can be isolated from the harmful area without providing the bunkering piping 51 below the exposed deck 13. This makes it possible to prevent a decrease in the degree of freedom in installing the fuel tank 92 located below the exposed deck 13. Therefore, the capacity of the fuel tank 92 can be increased.

[0071] (2) The vessels 1, 1A according to the second aspect are the vessels 1, 1A of (1), further comprising a pair of fore and aft bulkheads 70 on the bunkering deck 46 that surround the bunkering piping 51 from both sides in the bow-stern direction D2.

[0072] According to the above configuration, the bunkering piping 51 arranged on the bunkering deck 46 is surrounded on both sides in the fore-and-aft direction D2 by the forward and aft bulkheads 70. As a result, even if fuel leaks from the bunkering piping 51, the vaporized fuel can be prevented from flowing out in the fore-and-aft direction D2 from the space on the bunkering deck 46 where the bunkering piping 51 is arranged. Therefore, the vaporized fuel can be prevented from reaching the evacuation passage 60 located near the bunkering deck 46.

[0073] (3) The vessels 1, 1A according to a third aspect are the vessels 1, 1A of (2), in which the fore and aft bulkheads 70 have opening and closing sections 71 that can be switched between an open state and a closed state in the fore-and-aft direction D2.

[0074] According to the above configuration, the fore and aft bulkheads 70 have opening / closing sections 71. The opening / closing sections 71 can be switched between a state in which they are open in the bow-stern direction D2 and a state in which they are closed. That is, the opening / closing sections 71 can be switched between an open state in which crew members and the like can pass through, and a closed state in which they are sealed and cannot pass through. The provision of the opening / closing sections 71 on the fore and aft bulkheads 70 allows crew members to easily access the space on the bunkering deck 46 in which the bunkering piping 51 is arranged. Therefore, it is possible to prevent vaporized fuel from reaching the evacuation passage 60 while ensuring access to the space in which the bunkering piping 51 is arranged.

[0075] (4) The vessels 1, 1A according to a fourth aspect are the vessels 1, 1A according to (1) to (3), and further include an upper bulkhead 80 that covers the bunkering pipe 51 from above.

[0076] According to the above configuration, the bunkering pipe 51 is covered from above by the upper bulkhead 80. Therefore, even if fuel leaks from the bunkering pipe 51, it is possible to prevent the vaporized fuel from spreading upward from the space on the bunkering deck 46 where the bunkering pipe 51 is located. In addition, cargo and the like can be placed on the upper surface of the upper bulkhead 80 facing upward. Therefore, the loading capacity of the ships 1, 1A can be increased.

[0077] (5) The vessels 1, 1A according to the fifth aspect are the vessels 1, 1A of (1) to (4), in which the fuel is ammonia, and further comprising a water supply unit 93 that sprays water around the bunkering piping 51 provided on the bunkering deck 46.

[0078] According to the above configuration, the fuel of the vessels 1, 1A is ammonia. In such vessels 1, 1A, if ammonia leaks from the bunkering piping 51, there is a possibility that the ammonia gas will diffuse to the surroundings. In this embodiment, a water supply unit 93 is provided around the bunkering piping 51 arranged on the bunkering deck 46, and is capable of spraying water around the bunkering piping 51. Therefore, by spraying water from the water supply unit 93, vaporized ammonia can be absorbed into the water. Therefore, it is possible to prevent ammonia that has leaked on the bunkering deck 46 from spreading beyond the water supply unit 93. As a result, it is possible to further prevent the leaked ammonia from reaching the evacuation passages 60, 60A.

[0079] (6) The vessels 1, 1A according to a sixth aspect are the vessels 1, 1A of (5), in which the water supply unit 93 has a first water supply unit 94 arranged along the fore and aft bulkheads 70.

[0080] According to the above configuration, the first water supply unit 94 is arranged along the fore-and-aft bulkheads 70. Therefore, when the opening / closing unit 71 is operated, water can be sprayed to the locations that communicate in the fore-and-aft direction D2. Therefore, even if the opening / closing unit 71 is operated in the event of leakage from the bunkering piping 51 arranged on the bunkering deck 46, the diffusion of ammonia in the fore-and-aft direction D2 can be suppressed. In other words, when ammonia leaks from the bunkering piping 51, crew members and the like can pass through the opening / closing unit 71 while suppressing the diffusion of ammonia.

[0081] (7) The vessel 1, 1A according to the seventh aspect is the vessel 1, 1A of (5) or (6), wherein the water supply unit 93 has a second water supply unit 95 provided on the bunkering pipe 51 and sprays water so as to cover the bunkering pipe 51 from the ship's width direction D3.

[0082] According to the above configuration, the second water supply unit 95 is arranged so as to cover the bunkering piping 51 arranged on the bunkering deck 46 from the exterior side of the hull 10, i.e., from the outside in the ship's transverse direction D3. Therefore, even if fuel leaks from the bunkering piping 51, it is possible to prevent vaporized fuel from flowing out from the space on the bunkering deck 46 where the bunkering piping 51 is arranged to the outside in the ship's transverse direction D3. Furthermore, when water is not being sprayed, the space on the bunkering deck 46 where the bunkering piping 51 is arranged is open to the outside of the hull 10, i.e., to the outside in the ship's transverse direction D3, which makes it easy to connect the bunkering piping 51 to external piping, etc. of the hull 10. In other words, fuel can be easily supplied from outside the ship. [Explanation of symbols]

[0083] 1 ship 10 Hull 11 side 12 Ship's Bottom 13 Exposure deck 20 Fuel adjustment room 21 Peripheral wall 22 Side wall 30 Tank Room 40 Exposed deck bunker facilities 41 Lateral bulkhead 42 First side bulkhead 43 First part 44 Second part 45 Second side bulkhead 46 Bunkering Deck 50 Bunkering Station 51 Bunkering piping 60 Evacuation route 61 Entrance / Exit 70 Front and rear bulkheads 71 Opening and closing section 80 Upper bulkhead 90 Engine Room 91 Superstructure 92 Fuel Tank 93 Water supply section 94 First Water Supply Department 95 Second water supply section 96 Third Water Supply Department 97 Lifeboat D1 Vertical direction D2 Fore and aft direction D3 Ship width direction

Claims

1. a hull having a pair of sides; a fuel tank provided within the hull; An exposed deck provided on the hull and having an evacuation passageway formed on the upper surface thereof extending along the ship side; A bunkering deck provided above the evacuation passage; a bunkering pipe disposed on the bunkering deck, connected to the outside of the hull to enable fuel exchange, and connected to the fuel tank; A side bulkhead that surrounds the evacuation passage from the width direction of the ship; Equipped with The side partitions are a first side bulkhead that encloses the evacuation passage from the exterior side of the hull; a second side bulkhead enclosing the evacuation passage from the opposite side of the first side bulkhead; A vessel having:

2. The ship according to claim 1, further comprising a pair of fore-and-aft bulkheads that surround the bunkering piping on the bunkering deck from both sides in the bow-stern direction.

3. The vessel according to claim 2 , wherein the fore-aft bulkheads have opening / closing sections that can be switched between an open state and a closed state in the bow-stern direction.

4. The ship according to claim 1 , further comprising an upper bulkhead that covers the bunkering pipe from above.

5. the fuel is ammonia, The ship according to claim 2 or 3, further comprising a water supply unit that sprays water around the bunkering pipe provided on the bunkering deck.

6. The watercraft according to claim 5, wherein the water supply section includes a first water supply section disposed along the fore and aft bulkheads.

7. The ship according to claim 5, wherein the water supply unit includes a second water supply unit that sprays water onto the bunkering piping provided on the bunkering deck so as to cover the bunkering piping from the ship width direction.

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