Vessel

Abstract

To provide a vessel with improved safety.SOLUTION: A vessel includes: a tank container 2 installed above an upper deck 4 as well as having a fuel tank installed inside; an electricity generator container 3 installed below the upper deck 4 as well as having the electricity generator installed inside; and a ventilator 7 installed in a state of going through the upper deck 4 from below to above and exhausting the air inside the electricity generator container 3 to the outside. Air exhausted from a top end unit 7b of the ventilator 7 improves fluidity of air around the tank container 2, thereby dispersing the fuel gas leaked from the tank container 2.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a ship on which a generator container and a tank container are installed, and to a ship that can improve safety. [Background technology]

[0002] The applicant has already proposed a structure for a ship equipped with a power generation container and a tank container (see, for example, Patent Document 1). Patent Document 1 discloses a configuration for supplying fuel gas from a fuel container to the power generation container. There is a demand for improving safety in the ship of Patent Document 1 in the event of a fuel gas leak from the fuel container. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2022-178823 Summary of the Invention [Problem to be solved by the invention]

[0004] The present invention has been made in view of the above problems, and an object of the present invention is to provide a ship that can improve safety. [Means for solving the problem]

[0005] A ship to achieve the above-mentioned object is a ship comprising a tank container having a fuel tank installed therein and a generator container having a generator installed therein, the ship comprising: a first installation area formed below an upper deck in which the generator container is installed; a second installation area formed above the upper deck in which the tank container is installed; and a ventilation duct arranged to penetrate the upper deck from bottom to top and to exhaust air inside the generator container to the outside, the ventilation duct having a lower end arranged at or near the generator container and an upper end arranged inside or near the second installation area. [Effects of the Invention]

[0006] According to the present invention, the upper end of the ventilator is positioned relatively close to the tank container, so the air discharged from the ventilator can improve the fluidity of the air around the tank container. Even if fuel gas leaks from the tank container, the fuel gas is diffused by the air discharged from the ventilator. This is advantageous for improving safety on ships. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 1 is an explanatory diagram illustrating an outline of a ship as seen from the side; [Figure 2] 2 is an explanatory diagram illustrating an enlarged example of the bow side of the ship in FIG. 1. [Figure 3] FIG. 3 is an explanatory diagram illustrating FIG. 2 in a plan view. [Figure 4] FIG. 2 is an explanatory diagram illustrating an enlarged side view of the periphery of the ventilation duct. [Figure 5] FIG. 5 is an explanatory diagram illustrating FIG. 4 in plan view. [Figure 6] FIG. 6 is an explanatory diagram illustrating a modified example of FIG. 5. [Figure 7] 10A and 10B are explanatory diagrams illustrating modified examples of the upper end portion of the ventilator. [Figure 8] FIG. 5 is an explanatory diagram illustrating a modified example of FIG. 4. [Figure 9] 9 is an explanatory diagram illustrating FIG. 8 in plan view. [Figure 10] FIG. 2 is an explanatory diagram illustrating an example of the internal structure of the generator container. DETAILED DESCRIPTION OF THE INVENTION

[0008] The following description of a vessel will be based on an 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.

[0009] 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 four tank containers 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.

[0010] 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.

[0011] 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 vertical 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-ft container whose longitudinal direction is the ship's length direction x to pass through.

[0012] 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.

[0013] 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.

[0014] In this embodiment, the first installation area P1 and the second installation area P2 are formed near the bow of the ship 1. Furthermore, 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. Furthermore, 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 shifted 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.

[0015] As shown in FIG. 4, the ship 1 is equipped with a ventilator 7 that is arranged to penetrate the upper deck 4 from bottom to top. The ventilator 7 has a middle portion fixed to the upper deck 4. The ventilator 7 has the function of discharging air inside the generator container 3 to the outside. In this embodiment, the lower end 7a of the ventilator 7 is connected to the wall surface of the generator container 3. The ventilator 7 is in a state where the inside and outside of the generator container 3 are in communication. The lower end 7a of the ventilator 7 is configured so that it can be attached and detached to the generator container 3.

[0016] As shown in Figure 5, the upper end 7b of the ventilator 7 is located outside the second installation area P2 and in the vicinity of the second installation area P2. In this embodiment, the ventilator 7 branches midway and has three upper end portions 7b. For the sake of explanation, the second installation area P2 is shown by a dashed dotted line in Figure 5. In this embodiment, a plurality of tank containers 2 are arranged in the second installation area P2 with gaps between them.

[0017] The upper end 7b of the ventilation tube 7 is formed in a tubular shape, such as a cylindrical or rectangular tube shape. The upper end 7b is positioned so that the extension direction of the central axis c1 of the upper end 7b reaches the gap between the tank containers 2 in the ship's width direction y. As shown in FIG. 4, the upper end 7b is positioned so that the central axis c1 is approximately horizontal. It can be said that the extension direction of the central axis c1 of the upper end 7b indicates the traveling direction of the air discharged from the upper end 7b.

[0018] 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. The tank container 2 and the generator container 3 are connected by a fuel pipe (not shown). For example, gaseous natural gas, ammonia, or hydrogen is supplied from the tank container 2 to the generator container 3 via this fuel pipe. The type of fuel supplied by the tank container 2 and the type of generator 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.

[0019] When electricity is generated by the generator container 3, the gas engine, generator, etc. are driven, causing the temperature of the air inside the generator container 3 to rise. The heated air passes through the ventilator 7 and is discharged to the outside of the generator container 3. As shown in FIG. 4, the air that has passed through the ventilator 7 is discharged above the upper deck 4. The air discharged from the upper end 7b moves toward the gaps in the tank container 2. For the sake of explanation, arrows are used in FIGS. 4 and 5 to indicate the direction in which the air heated by the gas engine, etc. flows.

[0020] The air discharged from the ventilator 7 creates a current of air around the tank container 2. In addition, air with a temperature higher than the atmospheric air is supplied from the ventilator 7 to the area around the tank container 2.

[0021] The air discharged from the upper end 7b of the ventilation tube 7 improves the fluidity of the air around the tank container 2. Even if fuel gas leaks from the tank container 2, this fuel gas is dispersed. Since the fuel gas does not remain at a relatively high concentration on the upper deck 4, accidents such as fuel gas combustion can be avoided. In addition, accidents such as the crew of the ship 1 inhaling fuel gas can be avoided. This is advantageous for improving safety on the ship 1.

[0022] When multiple tank containers 2 are installed on the ship 1, the air flow rate decreases, especially in the gaps between the tank containers 2. Air can be supplied from the ventilation tube 7 toward these gaps, improving the air flow rate in the gaps.

[0023] The air discharged from the generator container 3 creates a flow in the air around the tank container 2. The air discharged from the generator container 3 is also at a higher temperature than the air around the tank container 2. If the tank container 2 has a heat exchanger that uses the heat of the surrounding atmosphere to heat the fuel, the efficiency of fuel heating improves as the fluidity of the air around the tank container 2 improves. Furthermore, the efficiency of fuel heating further improves as the temperature of the air around the tank container 2 increases. This is advantageous for efficiently heating fuel on the ship 1.

[0024] The upper end 7b of the ventilation tube 7 is preferably located inside the second installation area P2 or near the second installation area P2. Near the second installation area P2 refers to a position that is outside the second installation area P2 but close to the second installation area P2 in a plan view. Specifically, for example, in the plan view illustrated in FIG. 5, this refers to a position within 7 m, preferably within 5 m, of the second installation area P2.

[0025] The vicinity of the second installation area P2 can be said to be a position where no other equipment is placed between the upper end 7b of the ventilator 7 and the tank container 2. It can also be said to be a position where air discharged from the upper end 7b can reach the tank container 2. If a fan is installed in the ventilator 7, the position where the upper end 7b can be placed changes depending on the air volume generated by the fan. In other words, it can be said that the position that is near the second installation area P2 changes depending on the flow rate and flow velocity of the air discharged from the upper end 7b.

[0026] 6, the tank container 2 may be configured to be detachable from the fuel pipe 8 via a detachable part 8a. In this embodiment, the detachable part 8a is formed in the vicinity of the tank container 2. The other end of the fuel pipe 8 is connected to the generator container 3 to which fuel is to be supplied.

[0027] As illustrated in FIG. 6, the upper end 7b of the ventilation duct 7 may be configured to discharge air toward the detachable portion 8a, for example. Specifically, the upper end 7b is positioned such that the extension direction of the central axis c1 of the upper end 7b reaches the detachable portion 8a. If fuel gas leaks from the detachable portion 8a, this can prevent the fuel gas from accumulating there. The air discharged from the upper end 7b diffuses the fuel gas and reduces its concentration. This is advantageous for improving safety in the ship 1. In this case, it is desirable to position the upper end 7b at a predetermined distance, such as 4.5 m, from the detachable portion 8a. This is because it can prevent fuel gas leaking from the detachable portion 8a from flowing into the ventilation duct 7 and being sent inside the ship. This is advantageous for improving safety in the ship 1.

[0028] The number of tank containers 2 installed in the second installation area P2 is not limited to four. The number of tank containers 2 may be one or two or more. Even when there is one tank container 2, the same effect as above can be obtained. When air discharged from the upper end 7b collides with one tank container 2, fuel gas leaking from the tank container 2 is diffused. This improves safety on the ship 1. Furthermore, when air is supplied around one tank container 2 from the upper end 7b, the fluidity of the air around the tank container 2 is improved. This is advantageous for efficiently heating fuel on the ship 1.

[0029] As illustrated in FIG. 7 , the ventilation tube 7 may have a waterproof cover 9 attached to its upper end 7b. Air discharged from the generator container 3 collides with the waterproof cover 9 and spreads around the upper end 7b. In this embodiment, the air discharged from the upper end 7b does not flow in a specific direction, such as through gaps in the tank container 2. The air discharged from the upper end 7b spreads around the upper end 7b. When the upper end 7b is positioned close to the tank container 2, even air that passes through the waterproof cover 9 can sufficiently improve the air flow around the tank container 2. When the outlet of the waterproof cover 9 faces downward from approximately horizontal and is positioned higher than the detachable portion 8a and the heat exchanger of the tank container 2, as illustrated in FIG. 7 , the air flow around the tank container 2 can be further improved. Compared to this embodiment, the embodiments illustrated in FIGS. 5 and 6 are more likely to improve the safety of the ship 1 and the efficiency of fuel heating.

[0030] The upper end portion 7b is not limited to a configuration in which the central axis c1 is substantially horizontal. As illustrated in Fig. 7, the central axis c1 of the upper end portion 7b may be configured to point upward or downward. Furthermore, the central axis c1 of the upper end portion 7b may be inclined obliquely upward or downward. Any configuration is acceptable as long as air discharged from the upper end portion 7b can reach the periphery of the tank container 2.

[0031] The number of upper ends 7b of the ventilation duct 7 is not limited to three as illustrated in FIG. 5 or four as illustrated in FIG. 6. At least one upper end 7b needs to be installed, and five or more may be installed. During the design stage of the ship 1, the number of upper ends 7b can be changed as appropriate depending on the situation in which the tank container 2 is installed in the second installation area P2. The more upper ends 7b there are, the more types of directions the air can be discharged from the upper ends 7b. On the other hand, the fewer the number of upper ends 7b there are, the more the flow rate of air discharged from one upper end 7b can be increased. This is advantageous for improving the fluidity of the air around the tank container 2.

[0032] For example, in the embodiment illustrated in Fig. 5, three upper end portions 7b may be arranged on the stern side (left side in Fig. 5) of the second installation area P2. In Fig. 5, the additional upper end portions 7b are indicated by dashed lines for the sake of explanation.

[0033] The ventilation tube 7 may also have a switching valve in the middle, and may be configured to discharge air from either the upper end 7b on the stern side or the upper end 7b on the bow side in FIG. 5. By operating the switching valve according to the wind direction, etc., the direction of the air discharged from the upper end 7b can be switched. This can avoid the problem of the air discharged from the upper end 7b being pushed back by the wind, etc., and not reaching the periphery of the tank container 2.

[0034] In the second installation area P2, the tank containers 2 may be arranged stacked in the vertical direction z. In this case, the air may be discharged from the upper end portion 7b of the ventilation tube 7 toward the gap between the tank containers 2 stacked vertically.

[0035] A fan may be installed in the ventilation duct 7. The air inside the generator container 3 is forcibly discharged from the upper end 7b of the ventilation duct 7. The flow rate of the air discharged from the upper end 7b is greater than when no fan is installed. This is advantageous for improving the fluidity of the air around the tank container 2.

[0036] An intake pipe may be installed between the first installation area P1 and above the upper deck 4. A fan may be installed in this intake pipe. Fresh air is forcibly supplied to the first installation area P1 through the intake pipe. The air supplied to the first installation area P1 flows into the inside of the generator container 3. The heated air inside the generator container 3 is pushed out through the ventilator 7. Even when a fan is installed in the intake pipe, the flow rate of air discharged from the upper end 7b of the ventilator 7 becomes large. The fan may be installed in either the ventilator 7 or the intake pipe, or in both. A configuration in which fans are not installed in the ventilator 7 or the intake pipe is also possible.

[0037] As illustrated in Figures 8 and 9, the upper end 7b of the ventilator 7 may be configured to be located inside the second installation area P2. In this embodiment, the upper end 7b is located in the gap between the tank containers 2. It is desirable that the upper end 7b be fixed at the same position as the underside of the tank container 2 installed on the upper deck 4 in the vertical direction z, or at a position lower than the underside of the tank container 2. This can prevent the tank container 2 from colliding with the ventilator 7 when installing the tank container 2 on the upper deck 4. In this case, the upper end 7b may have a waterproof cover 9, as in the embodiment illustrated in Figure 7. In this case, it is desirable that the upper end of the waterproof cover 9 be located at the same position as the underside of the tank container 2 installed on the upper deck 4, or at a lower position.

[0038] 10, the generator container 3 may have an internal combustion engine 10 such as a gas engine disposed therein, and a second heat exchanger 11 that uses exhaust gas from the internal combustion engine 10 as a heat medium to heat the air inside the generator container 3. The internal combustion engine 10 is connected to an intake pipe 12 and an exhaust gas pipe 13. The internal combustion engine 10 is also connected to a generator 14 that converts driving force into electricity.

[0039] The intake pipe 12 may have an upper end located above the upper deck 4 and supply fresh intake air to the internal combustion engine 10 and also to the inside of the generator container 3. The intake pipe 12 may have a fan 12a. For the sake of explanation, the direction of air flow is indicated by arrows in Figure 10.

[0040] The upper end of the exhaust gas pipe 13 is located above the upper deck 4, and exhaust gas emitted from the internal combustion engine 10 is discharged to the outside. Because the exhaust gas reaches a fairly high temperature, it is desirable to locate the upper end of the exhaust gas pipe 13 in a position as far away as possible from the second installation area P2. This can prevent the high-temperature exhaust gas from coming into contact with fuel gas leaking from the tank container 2, etc.

[0041] The air inside the generator container 3 passes through the second heat exchanger 11, then passes through the ventilator 7, and is discharged from the upper end 7b. The second heat exchanger 11 is configured to use the heat of the exhaust gas from the internal combustion engine 10 to heat the air inside the generator container 3. In other words, the second heat exchanger 11 increases the temperature of the air discharged from the upper end 7b of the ventilator 7. Since the temperature of the air discharged from the upper end 7b of the ventilator 7 can be increased, this is advantageous for efficiently heating fuel in the ship 1.

[0042] The configuration of the second heat exchanger 11 is not limited to the above. The second heat exchanger 11 may have a configuration in which it dissipates heat into the inside of the generator container 3. The air heated by the second heat exchanger 11 is discharged from the upper end portion 7b via the ventilator 7. The second heat exchanger 11 may also be installed outside the generator container 3. In this case, the second heat exchanger 11 is installed, for example, at a position outside the generator container 3, and performs heat exchange between the exhaust gas pipe 13 and the ventilator 7.

[0043] The generator container 3 is not limited to a box-shaped container surrounded by walls on all six sides. The generator container 3 may be a frame-type container consisting of only a bottom plate and a frame. A frame-type container is one in which at least some of the six walls are open, allowing air to move between the inside and outside of the container.

[0044] If the generator container 3 is configured as a frame-type container, the lower end 7a of the ventilator 7 may be configured to be located near the generator container 3. In this case, the ventilator 7 exhausts air inside the first installation area P1 from the upper end 7b. The ventilator 7 indirectly exhausts air inside the generator container 3 to the outside.

[0045] The generator container 3 is not limited to a configuration in which it is disposed directly below the tank container 2. In other words, it is not limited to a configuration in which the first installation area P1 is formed directly below the second installation area P2. Forming the first installation area P1 and the second installation area P2 close to each other is advantageous in terms of suppressing a decrease in the temperature of the air discharged from the ventilator 7.

[0046] If the generator container 3 is configured as a box-shaped container, the first installation area P1 may be formed above the upper deck 4 as well as below. In this case, one end of the ventilator 7 is connected to the generator container 3 in a state that it reaches the inside of the generator container 3. The other end of the ventilator 7 is located inside or near the second installation area P2. Heated air inside the generator container 3 is supplied to the periphery of the tank container 2. This improves safety on the ship 1 and also improves fuel heating efficiency. [Explanation of symbols]

[0047] 1 ship 2 Tank containers 3 Generator Container 4 Upper Deck 5 Opening 6 Cover 7 Ventilation tube 7a Lower end 7b Upper end 8 fuel pipes 8a Detachable part 9 Waterproof cover 10 Internal combustion engine 11 Second heat exchanger 12 Intake pipe 13 Exhaust gas pipe 14. Generator x Captain direction y Width direction z Vertical direction P1 First installation area P2 Second installation area c1 center axis

Claims

1. In a ship having a tank container with a fuel tank installed therein and a generator container with a generator installed therein, a first installation area formed below the upper deck in which the generator container is installed, a second installation area formed above the upper deck in which the tank container is installed, and a ventilation duct arranged to penetrate the upper deck from bottom to top and to exhaust air inside the generator container to the outside, The ship, characterized in that the lower end of the ventilation duct is located in the generator container or in the vicinity thereof, and the upper end is located inside the second installation area or in the vicinity thereof.

2. The second installation area has a configuration in which a plurality of the tank containers are arranged with gaps therebetween, 2. The ship according to claim 1, wherein the upper end of the ventilation tube is formed in a cylindrical shape and the extension direction of the central axis of the upper end reaches the gap between the tank containers.

3. The vessel according to claim 2 , wherein the upper end of the ventilator is disposed in the vicinity of the second installation area, and the central axis of the upper end is substantially horizontal.

4. The ship according to claim 2, wherein the upper end of the ventilator is disposed inside the second installation area, and the upper end is disposed in the gap between the tank containers.

5. The watercraft according to claim 1 , wherein the ventilator has a waterproof cover attached to the upper end thereof.

6. 6. The ship according to any one of claims 1 to 5, wherein the tank container has a heat exchanger that heats the fuel taken out of the fuel tank, and the heat exchanger is configured to exchange heat between the air surrounding the tank container and the fuel.

7. The ship according to any one of claims 1 to 5, wherein the generator container has an internal combustion engine disposed therein, and a second heat exchanger that heats the air inside the generator container using exhaust gas from the internal combustion engine as a heat medium.

8. 7. The ship according to claim 6, wherein the generator container has an internal combustion engine disposed therein, and a second heat exchanger that heats the air inside the generator container using exhaust gas from the internal combustion engine as a heat medium.

9. In a ship having a tank container with a fuel tank installed therein and a generator container with a generator installed therein, a first installation area in which the generator container is installed, a second installation area formed above the upper deck in which the tank container is installed, and a ventilation duct connected to the generator container for discharging air inside the generator container to the outside, The ship is characterized in that one end of the ventilation duct is arranged in communication with the interior of the generator container, and the other end is arranged inside or near the second installation area.

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