Ship and installation method

Abstract

Provided are a ship and an installation method capable of suppressing deterioration of righting ability while facilitating installation of a generator container. A ship 1 comprises a tank container in which a fuel tank is installed, and a generator container in which a generator is installed, the ship being provided in advance with an opening formed in an upper deck 4 and configured so that the generator container can pass through, and a cover 6 covering the opening, and during installation of the tank container and the generator container in the ship 1, there being provided a first installation step for installing the generator container in a first installation region P1 formed below the opening, a cover installation step for covering the opening with the cover 6, and a second installation step for installing the tank container in a second installation region P2 formed above the opening.

Description

Vessel and installation method

[0001] The present invention relates to a ship equipped with a generator container and a tank container, and to a method for installing the generator container, etc., and to a ship and installation method that can easily install the generator container while suppressing a decrease in stability performance.

[0002] The applicant has already proposed a ship structure equipped with a generator container and a tank container (see, for example, Patent Document 1). Patent Document 1 discloses a ship configuration equipped with equipment for moving the generator container carried below the upper deck horizontally or vertically. Because the generator container needs to be moved horizontally inside the relatively narrow space of the ship, installing the generator container is not easy.

[0003] One possible solution to the above problems is to install the power generation container on the upper deck. This configuration makes it easier to install the power generation container. However, it has the drawback of making it impossible to install other equipment that should be installed on the upper deck. Furthermore, if the power generation container is installed above the equipment that should be installed on the upper deck, or if the power generation container and fuel containers are stacked multiple times on the upper deck, the center of gravity of the ship will be higher, which could impair its stability.

[0004] Japanese Patent Application Publication No. 2022-178823

[0005] The present invention has been made in view of the above problems, and an object of the present invention is to provide a ship and an installation method that can easily install a generator container while suppressing a decrease in stability.

[0006] A ship for achieving the above-mentioned object is characterized in that the ship comprises a tank container having a fuel tank installed therein and a generator container having a generator installed therein, and further comprises an opening formed in the upper deck that allows the generator container to pass through, a cover that covers the opening, a first installation area formed below the opening in which the generator container is installed, and a second installation area formed above the opening in which the tank container is installed.

[0007] An installation method for achieving the above-mentioned object is an installation method for installing a tank container having a fuel tank installed therein and a generator container having a generator installed therein on a ship, the ship being equipped in advance with an opening formed in an upper deck to allow the generator container to pass through and a cover to cover the opening, the installation method comprising a first installation step of installing the generator container in a first installation area formed below the opening, a cover installation step of covering the opening with the cover, and a second installation step of installing the tank container in a second installation area formed above the opening.

[0008] According to the present invention, since a first installation area is formed below the opening, the generator container can be easily installed in the first installation area using a container crane, etc. This is advantageous in that it makes it easy to install the generator container while suppressing a decrease in stability.

[0009] FIG. 1 is an explanatory diagram showing a schematic side view of a ship. FIG. 2 is an explanatory diagram showing an enlarged view of the bow side of the ship of FIG. 1. FIG. 3 is an explanatory diagram showing FIG. 2 in a plan view. FIG. 4 is an explanatory diagram showing a perspective view of a generator container and a tank container installed on the ship. FIG. 5 is an explanatory diagram illustrating a modified example of FIG. 2. FIG. 6 is an explanatory diagram showing FIG. 5 in a plan view. FIG. 7 is an explanatory diagram illustrating a state in which a generator container and the like are arranged on the ship of FIG. 5. FIG. 8 is an explanatory diagram showing FIG. 7 in a plan view. FIG. 9 is an explanatory diagram illustrating a modified example of FIG. 4. FIG. 10 is an explanatory diagram illustrating the arrangement of fuel pipes and exhaust gas pipes. FIG. 11 is an explanatory diagram showing a perspective view of a fuel gas purge pipe. FIG. 12 is an explanatory diagram illustrating the arrangement of a fuel gas purge pipe and an exhaust gas pipe.

[0010] The vessel and the installation method will be described below based on the embodiment shown in the drawings. In the drawings, the width direction of the vessel is indicated by arrow y, the longitudinal direction perpendicular to the width direction y is indicated by arrow x, and the up-down direction perpendicular to the width direction y and the longitudinal direction x is indicated by arrow z.

[0011] As illustrated in Fig. 1, the ship 1 is equipped with a tank container 2 having a fuel tank disposed therein, and a generator container 3 having a generator disposed therein. In this embodiment, the ship 1 is equipped with one tank container 2 and one generator container 3. The tank container 2 is, for example, a 40-ft container, and the generator container 3 is, for example, a 20-ft container. In this embodiment, the tank container 2 and the generator container 3 are installed on the ship 1 with their longitudinal directions parallel to the longitudinal direction x of the ship. In the vertical direction z, the tank container 2 is disposed above the upper deck 4, and the generator container 3 is disposed below the upper deck 4.

[0012] It is desirable that the tank container 2 is larger in the longitudinal direction than the generator container 3. The tank container 2 is not limited to the size of a 40 ft container, and may be configured as, for example, a 45 ft container. Similarly, the generator container 3 is not limited to the size of a 20 ft container. Furthermore, both the tank container 2 and the generator container 3 may be configured as containers of the same size in the longitudinal direction, for example, a 20 ft container or a 40 ft container.

[0013] 2 and 3, the ship 1 is provided with an opening 5 formed in the upper deck 4 and penetrating the upper deck 4 in the up-down direction z. The opening 5 is formed to a size that allows the generator container 3 to pass through. In this embodiment, the opening 5 is formed to a size that allows a 20-foot container whose longitudinal direction is the ship's length direction x to pass through.

[0014] A cover 6 that covers the opening 5 is installed above the opening 5. The top surface of the cover 6 is placed on the upper deck 4 at the same height as the upper deck 4 or at a slightly higher height. The cover 6 is made of, for example, a steel plate and may have a watertight structure. In this case, the cover 6 is made of a watertight door that covers the opening 5 in an openable and closable state. The cover 6 opens and closes the opening 5 by sliding horizontally, rotating around a hinge, or being lifted up and removed by a wire or the like.

[0015] The ship 1 is equipped with a first installation area P1 formed below the opening 5 and in which the generator container 3 is installed, and a second installation area P2 formed above the opening 5 and in which the tank container 2 is installed. For the sake of explanation, the ranges of the first installation area P1 and the second installation area P2 are shaded in Figures 2 and 3. The first installation area P1 is an area below the upper deck 4 and is formed in a position directly below the opening 5. The second installation area P2 is an area above the upper deck 4 and is formed in a position that includes at least a portion of the area directly above the opening 5.

[0016] In this embodiment, the first installation area P1 and the second installation area P2 are formed near the bow of the ship 1. As illustrated in FIG. 2 , the bow-side ends of the first installation area P1 and the second installation area P2 are formed so that they coincide in the longitudinal direction x. As illustrated in FIG. 3 , the first installation area P1 and the second installation area P2 are formed at a position that is the center of the ship 1 in the transverse direction y. The positions of the first installation area P1 and the second installation area P2 are not limited to the above. As long as the condition for the second installation area P2 to be formed above the first installation area P1 is satisfied, the bow-side ends of the first installation area P1, etc. may be in different positions in the longitudinal direction x, or may be formed in a position closer to the port or starboard side in the transverse direction y. It is sufficient that the first installation area P1 and the second installation area P2 at least partially overlap in a plan view.

[0017] Next, an installation method for installing the tank container 2 and the generator container 3 on the ship 1 will be described. First, the generator container 3 is lifted by a container crane or the like arranged on the quay, and then passes from above through the opening 5 downward. The generator container 3 is placed on the bottom surface 7 of the first installation area P1 (hereinafter, sometimes referred to as the first installation step S10). In this embodiment, in the first installation step S10, the generator container 3 is placed with its longitudinal direction parallel to the ship's longitudinal direction x. At this time, the generator container 3 may be fixed to the bottom surface 7 of the first installation area P1.

[0018] Next, the opening 5 is covered with the cover 6 (hereinafter, this may be referred to as a cover installation step S20). The cover 6 covering the opening 5 can prevent workers and the like from falling through the opening 5. The cover 6 also can prevent rain and waves from flowing downward through the opening 5.

[0019] Next, the tank container 2 is lifted by a container crane or the like, and then placed on the upper deck 4, which will be the bottom of the second installation area P2 (hereinafter, this may be referred to as the second installation step S30). In this embodiment, in the second installation step S30, the tank container 2 is placed with its longitudinal direction parallel to the ship's longitudinal direction x. At this time, the tank container 2 may be fixed to the upper deck 4. At least a portion of the cover 6 is covered by the tank container 2.

[0020] As shown in Figure 4, the tank container 2 is placed in a position directly above the generator container 3. For the sake of explanation, the upper deck 4, opening 5, cover 6, etc. are omitted from Figure 4. After the second installation step S30, the tank container 2 and the generator container 3 are connected by a fuel pipe 8. Fuel is supplied from the tank container 2 to the generator container 3 through the fuel pipe 8. The fuel pipe 8 is placed, for example, so as to penetrate the upper deck 4 from bottom to top, with a midsection fixed to the upper deck 4. The fuel pipe 8 is configured so that its upper end is detachable from the tank container 2 and its lower end is detachable from the generator container 3.

[0021] The tank container 2 has a fuel tank that stores, for example, liquefied natural gas, liquid ammonia, or hydrogen gas. The generator container 3 has a gas engine that runs on natural gas or the like as fuel, and a generator that converts the driving force of the gas engine into electricity. The generator container 3 may also have a fuel cell that generates electricity using hydrogen gas as fuel. For example, gaseous natural gas, ammonia, or hydrogen passes through the fuel pipe 8. The type of fuel supplied by the tank container 2 and the type of generator contained in the generator container 3 are not limited to those described above. They can be changed as appropriate depending on the generator and the fuel compatible with this generator.

[0022] When the ship 1 is sailing, the generator container 3, which receives fuel from the tank container 2, generates electricity and supplies it to the ship 1. The ship 1 can obtain propulsion power by, for example, driving a propeller using the electricity supplied from the generator container 3. The generator container 3 may be mounted on the ship 1 as a power source for onboard power supply.

[0023] Fuel supply to the ship 1 is achieved by replacing the tank container 2. First, the tank container 2 that is low on fuel is disconnected from the fuel pipe 8. The tank container 2 is lowered from the ship 1 by a container crane or the like. After that, a tank container 2 that is fully filled with fuel is loaded onto the ship 1, and the fuel pipe 8 is connected (hereinafter, this may be referred to as the tank container replacement step S40).

[0024] The generator container 3 is replaced when maintenance is performed or when a malfunction occurs. First, the tank container 2 and cover 6 are removed from the ship 1. The malfunctioning generator container 3 is lowered from the ship 1 by a container crane or the like. Thereafter, a generator container 3 that is in normal operation is loaded onto the ship 1 (hereinafter, this may be referred to as the generator container replacement step S50).

[0025] As shown in FIG. 3 , the ship 1 has a first installation area P1 formed within the range that fits inside the opening 5 in a plan view. In other words, the first installation area P1 is formed directly below the opening 5. Therefore, the generator container 3 is installed in the first installation area P1, which is the installation position, using a container crane or the like. This eliminates the need to move the generator container 3 horizontally within the ship. In other words, in the first installation step S10 and the generator container replacement step S50, the generator container 3 moves only in the vertical direction z after passing through the opening 5 from above to below. This is advantageous in facilitating the installation and replacement work of the generator container 3.

[0026] This eliminates the need for equipment for horizontally moving the generator container 3 within the ship. In other words, since space for installing this equipment on the upper surface of the first installation area P1 is not required, it becomes easier to make the ship 1 smaller in the vertical direction z. As a result, the position of the upper deck 4 can be lowered, and the position of the tank container 2 placed on the upper deck 4 can also be lowered. This is advantageous for improving the stability of the ship 1.

[0027] The ship 1 does not need to be equipped with equipment for horizontally moving the generator container 3 within the ship. In addition, the position of the upper deck 4 can be made relatively low, which makes it possible to reduce the size of the ship 1. This is advantageous in reducing the construction costs of the ship 1.

[0028] Since there is no need to move the generator container 3 horizontally inside the relatively narrow space of the ship, this is advantageous in improving safety during the installation work of the generator container 3.

[0029] As illustrated in Fig. 1 , it is desirable that one of the second installation area P2 in which the tank container 2 is installed and the accommodation area 9 is formed near the bow, and the other is formed near the stern. Here, "near the bow" refers to an area that is closer to the bow than the cargo area 10 in which cargo is installed. As illustrated in Fig. 2 , the "near the bow" may include an area in which a portion of the second installation area P2 is closer to the bow than the cargo area 10 and partially overlaps with the cargo area 10 in a plan view. "Near the stern" refers to an area that is closer to the stern than the cargo area 10. The "near the stern" may also include an area in which a portion of the second installation area P2 is closer to the stern than the cargo area 10 and partially overlaps with the cargo area 10 in a plan view.

[0030] In the embodiment illustrated in Fig. 1, the first installation area P1 and the second installation area P2 are formed near the bow, and the accommodation section 9 is formed near the stern. The tank container 2 is configured to be installed at a position relatively far from the accommodation section 9. Even if a fuel gas leak or the like occurs from the tank container 2, it becomes easier to avoid accidents such as crew members accidentally inhaling the fuel gas. This is advantageous for improving crew safety.

[0031] In a vessel 1 in which the accommodation section 9 is formed near the bow, it is desirable to form the first installation area P1 and the second installation area P2 near the stern. Furthermore, when the accommodation section 9 is formed near the center of the vessel 1 in the longitudinal direction x, it is desirable to form the second installation area P2, etc., on the bow or stern side, as far away from the accommodation section 9 as possible. Specifically, it is desirable to form the second installation area P2 near the bow or stern. The vessel 1 does not have to be equipped with an accommodation section 9. Furthermore, the vessel 1 may have the first installation area P1, the second installation area P2, and the accommodation section 9 all formed near the bow.

[0032] The containers loaded on the ship 1 are not limited to one tank container 2 and one generator container 3. A supplier container 11 that has a supply device disposed therein that supplies fuel from the tank container 2 to the generator container 3 may be loaded on the ship 1. Furthermore, a plurality of tank containers 2 and a plurality of generator containers 3 may be loaded on the ship 1.

[0033] An example will be described in which the ship 1 is equipped with, for example, two generator containers 3, two supply containers 11, and four tank containers 2. The supply containers 11 are configured as containers of approximately the same size as the generator containers 3, for example, 20 ft containers.

[0034] As shown in Fig. 5, the height of the first installation area P1 in the vertical direction z is set to be at least twice the height of the generator container 3. Furthermore, the length of the first installation area P1 in the transverse direction y is set to be at least twice the length of the generator container 3 in the short side direction. In accordance with the first installation area P1 that is expanded in the transverse direction y, the length of the opening 5 in the transverse direction y is set to be at least twice the length of the generator container 3 in the short side direction, as shown in Fig. 6. The length of the second installation area P2 in the transverse direction y is set to be at least four times the length of the tank container 2 in the short side direction. The height of the second installation area P2 in the vertical direction z is set to be at least one time the height of the tank container 2.

[0035] As illustrated in Figure 7, in the first installation step S10, the generator container 3 is installed on the bottom surface 7 of the first installation area P1. In this embodiment, two generator containers 3 are installed side by side in the ship's width direction y. Then, a supplier container 11 is installed on top of each of the two generator containers 3. In this embodiment, the first installation step S10 includes installing the supplier container 11 in addition to the generator container 3.

[0036] In the first installation area P1, the generator container 3 may be installed above the supplier container 11. Alternatively, one generator container 3 may have the supplier container 11 installed above, and the other generator container 3 may be installed above the supplier container 11. Four containers are arranged in the first installation area P1, two in the ship's width direction y and two in the vertical direction z.

[0037] 8 , in the second installation step S30, four tank containers 2 are installed on the upper deck 4. In this embodiment, the four tank containers 2 are installed side by side in the ship's width direction y. Some of the tank containers 2 are installed in a state where they cover at least a part of the cover 6 arranged at the opening 5.

[0038] In the first installation area P1, the generator containers 3 and the supply containers 11 are stacked and arranged. Even when two or more generator containers 3, etc. are installed on the ship 1, horizontal movement within the ship is not required. The generator containers 3, etc. can be installed in the first installation area P1 using a container crane, etc., which is advantageous in facilitating the installation and replacement work of the generator containers 3, etc.

[0039] Even when two or more generator containers 3 are installed, there is no need to install equipment for horizontal movement on board the ship. The position of the upper deck 4 can be kept low, which is advantageous for improving the stability of the ship 1. It is also advantageous for reducing the construction costs of the ship 1.

[0040] Compared to the embodiment illustrated in FIG. 2 , the ship 1 illustrated in FIG. 5 has a lower bottom surface 7 of the first installation area P1. Because the installation positions of the generator container 3 and other components within the ship are lowered, the center of gravity of the ship 1 is lowered. The ship 1 is better balanced, making it easier to avoid accidents such as capsizing. This is advantageous for improving the stability of the ship 1. The safety of the ship 1 during navigation is improved. In the ship 1 illustrated in FIG. 8 , four tank containers 2 are arranged side by side in the ship's width direction y to lower the center of gravity. The ship 1 does not exclude a configuration in which tank containers 2 are stacked in the vertical direction z. Another tank container 2 may be installed on top of a tank container 2 installed on the upper deck 4. In this case, the height of the second installation area P2 in the vertical direction z is set to be at least twice the height of the tank containers 2.

[0041] Since multiple generator containers 3 and supply containers 11 can be installed on the ship 1, power generation can continue even if one of them breaks down. This is advantageous for improving the safety of the ship 1 during navigation.

[0042] The tank container 2 may have the same size in the longitudinal direction as the generator container 3, etc. However, it is desirable that the length of the tank container 2 in the longitudinal direction be set to be greater than the length of the generator container 3, etc.

[0043] With this configuration, the length of the opening 5 through which the generator container 3 and the like pass can be made smaller relative to the longitudinal length of the tank container 2. Since the tank container 2 is larger in its longitudinal direction than the cover 6 that covers the opening 5, at least a portion of the tank container 2 is supported on the upper deck 4. The cover 6 does not need to support the entire weight of the tank container 2, so it does not require high strength. This is advantageous in reducing the construction costs of the ship 1.

[0044] A configuration in which multiple openings 5 ​​are formed in the horizontal direction may be used. For example, two openings 5, each corresponding in size to one generator container 3 in a plan view, may be formed side by side in the ship's width direction y. The two generator containers 3 are placed in the first installation area P1 via the two openings 5. Compared to the embodiment illustrated in FIG. 6 , the size of each opening 5 can be reduced, and the cover 6 covering the opening 5 can also be made smaller. Because each cover 6 is smaller and lighter, handling the cover 6 during opening and closing is easier. Furthermore, simply removing only the tank container 2 on the cover 6 to be opened allows the generator container 3 and other items to be attached and detached to the ship 1. This reduces the space required for temporarily storing the removed tank container 2 and cover 6 and shortens the work time.

[0045] Since at least a portion of the tank container 2 is supported by the upper deck 4, the tank container 2 can be installed stably. This is advantageous in avoiding accidents such as the tank container 2 being displaced due to the influence of waves or the like while the ship 1 is sailing, causing the connection with the fuel pipe 8 to be released.

[0046] 5, it is desirable that at least a portion of the second installation area P2 be formed above the cargo compartment 10. In this embodiment, the first installation area P1 and the second installation area P2 are formed so that their bow-side ends are aligned in the longitudinal direction x. Therefore, the stern side of the second installation area P2 protrudes above the cargo compartment 10.

[0047] According to this configuration, it is possible to avoid a reduction in the cargo compartment 10 by forming the second installation area P2. If the ship 1 is a tanker that transports oil or the like, relatively tall structures related to cargo handling are rarely installed on the upper deck 4 at the front end of the cargo compartment 10. Therefore, this area can be used as an installation location for the tank containers 2. Furthermore, if the ship 1 is a bulk carrier or a container ship, the width of the bow is narrow, making it difficult to extend the front end of the cargo compartment 10 toward the bow. Therefore, warehouses, fresh water tanks, etc. are placed in the bow. Relatively tall structures are rarely installed on the upper deck 4 in the area where these warehouses, etc. are formed. Therefore, this area can be used as an installation location for the tank containers 2.

[0048] At least a part of the second installation area P2 may be formed above a warehouse section that stores materials, equipment, and the like required on the ship 1. This allows the space on the ship 1 to be used effectively.

[0049] In the embodiment illustrated in Figures 7 and 8, the tank containers 2, etc. are installed with their longitudinal direction aligned with the ship's length direction x. This configuration allows the tank containers 2, etc. to be loaded and unloaded using a spreader of a container crane installed on the quay. The container crane can handle the tank containers 2, etc. in the same way as with normal containers. This is advantageous for efficiently handling the tank containers 2, etc.

[0050] When the tank container 2 etc. is to be loaded and unloaded using a jib crane or the like that uses a single hook rather than a container crane, the tank container 2 etc. may be installed with its longitudinal direction parallel to the ship's width direction y.

[0051] As illustrated in Figure 1, the ship 1 may be configured to include a first fresh water tank 12 arranged sternward of the center of the hull in the longitudinal direction x, a second fresh water tank 13 arranged bowward of the center of the hull, and a connecting pipe 14 that enables fresh water to move between the first fresh water tank 12 and the second fresh water tank 13. In this embodiment, the first fresh water tank 12 is arranged near the stern, and the second fresh water tank 13 is arranged near the bow. Furthermore, the second fresh water tank 13 is arranged at a lower position than the first fresh water tank 12. For the sake of explanation, the connecting pipe 14 is shown by a dashed line in Figure 1.

[0052] When fuel in the tank container 2 is consumed while the ship 1 is sailing, the weight of the bow side of the ship 1 decreases. The weight balance between the fore and aft of the ship 1 changes depending on the amount of fuel consumed. At this time, by moving fresh water from the first fresh water tank 12 to the second fresh water tank 13, the weight near the bow of the ship 1 increases. It is possible to adjust the weight balance between the fore and aft of the ship 1.

[0053] Specifically, for example, by opening a valve installed in advance in the connecting pipe 14, the fresh water moves by gravity from the first fresh water tank 12 to the second fresh water tank 13. Alternatively, when the ship 1 leaves port, both the first fresh water tank 12 and the second fresh water tank 13 may be sufficiently filled with fresh water, so that when fresh water is used, the fresh water in the first fresh water tank 12 is used preferentially. While the weight of the tank container 2 decreases over time during navigation, the weight of the first fresh water tank 12 also decreases due to the use of fresh water. This makes it easier to maintain the weight balance between the fore and aft of the ship 1.

[0054] A pump may be installed in the connecting pipe 14. In this case, even if the first fresh water tank 12 is installed at the same height as the second fresh water tank 13 or at a lower position, fresh water can be moved. Furthermore, fresh water can be moved from one tank to the other as desired. This makes it easier to adjust the weight balance of the vessel 1.

[0055] Ballast water may be used to adjust the weight balance between the fore and aft of the ship 1. In this case, ballast water is loaded, which reduces the amount of cargo that can be loaded. Alternatively, ballast tanks may be added to the ship 1 to adjust the weight balance between the fore and aft of the ship 1. In this case, it is necessary to reduce existing areas such as the cargo compartment 10 to form the ballast tanks. In contrast, if existing fresh water tanks are used, there is no need to reduce the cargo or the area such as the cargo compartment 10. Adjusting the weight balance using the fresh water tanks 12, 13 is more economical because there is no reduction in the cargo load capacity of the ship 1.

[0056] As shown in Figure 9, the ship 1 is equipped with a fuel pipe 8 that is arranged penetrating the upper deck 4 from bottom to top and is connected at its upper side to the tank container 2. The fuel pipe 8 is connected to the supplier containers 11, for example, with a plurality of supplier containers 11 arranged in parallel. Furthermore, each supplier container 11 and its corresponding generator container 3 are connected by a separate fuel pipe 8. A plurality of tank containers 2 are connected to the fuel pipe 8 in parallel. The tank container 2 is configured to be detachable from the fuel pipe 8 by means of a detachable portion 8a.

[0057] The ship 1 is equipped with an exhaust gas pipe 15 that is arranged to penetrate the upper deck 4 from bottom to top and whose lower side is connected to the generator container 3. The exhaust gas pipes 15 are connected to the generator containers 3, for example, with a plurality of generator containers 3 arranged in parallel. Exhaust gas from a gas engine or the like arranged inside the generator container 3 is discharged from an upper end 15a of the exhaust gas pipe 15 to the outside of the ship 1. The upper end 15a refers to the upper end of the exhaust gas pipe 15, which is the open end.

[0058] 10, on the upper deck 4, the detachable portion 8a of the fuel pipe 8 is arranged on the bow side of the second installation area P2, and the upper end 15a of the exhaust gas pipe 15 is arranged on the stern side. However, it is not limited to the above, and it is desirable that one of the detachable portion 8a and the upper end 15a is arranged on the bow side of the second installation area P2 and the other is arranged on the stern side.

[0059] The detachable portion 8a of the fuel pipe 8 and the upper end 15a of the exhaust gas pipe 15 are positioned relatively far apart. This can prevent the relatively high-temperature exhaust gas discharged from the upper end 15a of the exhaust gas pipe 15 from flowing near the detachable portion 8a of the fuel pipe 8. This makes it easier to avoid accidents such as fuel leaking from the detachable portion 8a of the fuel pipe 8 and being heated by the exhaust gas and combusting. This is advantageous for improving the safety of the boat 1.

[0060] The detachable portion 8a and the upper end portion 15a may be disposed inside or outside the second installation area P2. It is desirable that at least the upper end portion 15a be disposed outside the second installation area P2. Even if fuel leaks from the fuel tank and fuel gas is present around the tank container 2, the possibility of contact between the fuel gas and exhaust gas can be reduced.

[0061] 10, the upper end 15a of the exhaust gas pipe 15 is disposed on the starboard side of the vessel 1, but it may be disposed on the port side or in the center in the vessel width direction y. Even in this case, the detachable portion 8a and the upper end 15a can be positioned relatively far apart.

[0062] As illustrated in Figure 11, the ship 1 may be equipped with a fuel gas purge pipe 16 that is arranged to penetrate the upper deck 4 from bottom to top and is connected at its lower end to the generator container 3. The fuel gas purge pipe 16 may be connected at its lower end to the supply container 11. The fuel gas purge pipe 16 is connected to the generator containers 3, for example, when multiple generator containers 3 are arranged in parallel. Fuel gas that has leaked inside the generator container 3 or that needs to be discharged from the inside is discharged to the outside from the upper end 16a of the fuel gas purge pipe 16. The upper end 16a refers to the upper end, which is the open end, of the fuel gas purge pipe 16. For ease of explanation, the fuel pipe 8 is omitted from Figure 11.

[0063] As illustrated in Figure 12, on the upper deck 4, the upper end 16a of the fuel gas purge pipe 16 is disposed on the port side of the ship 1, and the upper end 15a of the exhaust gas pipe 15 is disposed on the starboard side of the ship 1. Not limited to the above, it is desirable that one of the upper end 16a of the fuel gas purge pipe 16 and the upper end 15a of the exhaust gas pipe 15 is disposed on the port side of the ship 1 and the other is disposed on the starboard side. In the embodiment illustrated in Figure 12, the upper end 16a may be disposed on the port side of the ship 1 and on the stern side of the second installation area P2. For the sake of explanation, the fuel pipe 8 is omitted from Figure 12, and the fuel gas purge pipe 16 disposed below the upper deck 4 is shown by a dashed line.

[0064] The upper end 16a of the fuel gas purge pipe 16 and the upper end 15a of the exhaust gas pipe 15 are positioned relatively far apart. This prevents the relatively high-temperature exhaust gas discharged from the upper end 15a of the exhaust gas pipe 15 from flowing near the upper end 16a of the fuel gas purge pipe 16. This makes it easier to avoid accidents such as fuel being heated by exhaust gas and burning when discharged from the fuel gas purge pipe 16. This is advantageous for improving the safety of the ship 1.

[0065] As illustrated in FIG. 12 , the upper end 16a of the fuel gas purge pipe 16 is located on the bow side of the second installation area P2, and the upper end 15a of the exhaust gas pipe 15 is located on the stern side of the second installation area P2. While not limited to the above, it is desirable that one of the upper end 16a of the fuel gas purge pipe 16 and the upper end 15a of the exhaust gas pipe 15 is located on the bow side of the second installation area P2 and the other is located on the stern side. In this case, the upper end 16a and the upper end 15a may be located inside or outside the second installation area P2. This configuration can improve the safety of the ship 1, as described above. In the embodiment illustrated in FIG. 12 , the upper end 16a may be located on the starboard side of the ship 1 and on the bow side of the second installation area P2.

[0066] The upper end 16a of the fuel gas purge pipe 16 and the upper end 15a of the exhaust gas pipe 15 are preferably arranged such that, with the second installation area P2 as the center, one is on the port side and the bow side and the other is on the starboard side and the stern side, or one is on the port side and the stern side and the other is on the starboard side and the bow side. This configuration allows for a relatively wide gap between the upper end 16a and the upper end 15a.

[0067] The numbers of tank containers 2, generator containers 3, and supply containers 11 are not limited to those described above. The number of containers can be set arbitrarily, such as three tank containers 2, two generator containers 3, and one supply container 11 being installed on the ship 1. The first installation area P1 and the second installation area P2 are set in advance within a range in which the tank containers 2, etc. can be installed.

[0068] A portion of either the generator container 3 or the supply container 11 may be installed in the second installation area P2. However, a configuration in which all of the generator container 3 and the supply container 11 are installed in the first installation area P1 is advantageous for reducing the area occupied by containers, etc. on the upper deck 4. It is also advantageous for lowering the center of gravity of the ship 1.

[0069] Of the multiple tank containers 2, some of the tank containers 2 may be installed in the first installation area P1. This is advantageous for reducing the area occupied by containers, etc. on the upper deck 4 and for lowering the center of gravity of the ship 1. However, a configuration in which the tank containers 2 are installed in the second installation area P2 is more advantageous for improving the safety of the ship 1. This is because if fuel gas leaks from a tank container 2 installed in the second installation area P2, the fuel gas will easily disperse into the atmosphere. Furthermore, the tank container 2 installed in the second installation area P2 makes it easier to replace the tank container 2.

[0070] The multiple tank containers 2 carried on the ship 1 may be configured to supply different types of fuel. Specifically, some of the tank containers 2 may be configured to supply ammonia gas, and some to supply natural gas. This can accommodate a case where the gas engine of the generator container 3 uses a mixed fuel of ammonia gas and natural gas. It can also accommodate a case where some of the multiple generator containers 3 have gas engines that burn only ammonia, and some have gas engines that burn only natural gas. Furthermore, it can accommodate a case where fuel is switched during voyage, such as supplying hydrogen gas from the tank container 2 when the ship 1 is navigating near a port or the like, and supplying natural gas from the tank container 2 when navigating the open ocean.

[0071] DESCRIPTION OF SYMBOLS 1 Ship 2 Tank container 3 Generator container 4 Upper deck 5 Opening 6 Cover 7 Bottom surface 8 Fuel pipe 8a Detachable portion 9 Accommodation space 10 Cargo space 11 Supply machine container 12 First fresh water tank 13 Second fresh water tank 14 Connecting pipe 15 Exhaust gas pipe 15a Upper end 16 Fuel gas purge pipe 16a Upper end x Ship's length direction y Ship's width direction z Vertical direction P1 First installation area P2 Second installation area S10 First installation step S20 Cover installation step S30 Second installation step S40 Tank container replacement step S50 Generator container replacement step

Claims

1. A ship equipped with a tank container having a fuel tank installed therein and a generator container having a generator installed therein, characterized in that the ship comprises: an opening formed in the upper deck and configured to allow the generator container to pass through; a cover covering the opening; a first installation area formed below the opening and in which the generator container is installed; and a second installation area formed above the opening and in which the tank container is installed.

2. The ship according to claim 1, wherein the first installation area has a vertical height set to at least twice the height of the generator container.

3. A ship according to claim 1, wherein the longitudinal length of the tank container is set to be greater than the longitudinal length of the generator container.

4. A vessel as described in any one of claims 1 to 3, wherein the first installation area and the second installation area are configured to be formed near the bow.

5. A ship according to any one of claims 1 to 3, further comprising a cargo compartment for accommodating cargo, wherein at least a portion of the second installation area is formed above the cargo compartment.

6. A vessel as described in any one of claims 1 to 3, comprising a first fresh water tank located near the stern, a second fresh water tank located near the bow, and a connecting pipe that enables the movement of fresh water between the first fresh water tank and the second fresh water tank.

7. A vessel as set forth in any one of claims 1 to 3, comprising a fuel pipe arranged to penetrate the upper deck from bottom to top, the upper side of which is connected to the tank container, and an exhaust gas pipe arranged to penetrate the upper deck from bottom to top, the lower side of which is connected to the generator container, wherein the position of the detachable part where the tank container and the fuel pipe are connected and the position of the upper end of the exhaust gas pipe are configured so that one is located on the bow side of the second installation area and the other is located on the stern side.

8. A ship as claimed in any one of claims 1 to 3, comprising an exhaust gas pipe arranged to penetrate the upper deck from bottom to top, the lower side of which is connected to the generator container, and a fuel gas purge pipe arranged to penetrate the upper deck from bottom to top, the lower side of which is connected to the generator container, wherein the positions of the upper ends of the exhaust gas pipe and the fuel gas purge pipe satisfy at least one of the following configurations: one is arranged on the port side of the ship and the other is arranged on the starboard side, or one is arranged on the bow side of the second installation area and the other is arranged on the stern side.

9. A vessel as described in any one of claims 1 to 3, which is provided with a living space, and in which the living space, the first installation area, and the second installation area are configured such that one is formed near the bow and the other is formed near the stern.

10. A ship as described in any one of claims 1 to 3, comprising a living area and a cargo area formed near the center of the ship in the longitudinal direction, and the first installation area and the second installation area being formed near the bow or the stern.

11. An installation method for installing a tank container having a fuel tank installed therein and a generator container having a generator installed therein on a ship, wherein the ship is equipped in advance with an opening formed in the upper deck to allow the generator container to pass through and a cover to cover the opening, the installation method comprising: a first installation step of installing the generator container in a first installation area formed below the opening; a cover installation step of covering the opening with the cover; and a second installation step of installing the tank container in a second installation area formed above the opening.

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