Vessel and fuel supply system to vessel

Abstract

To load fuel to vessels efficiently to reduce docking time of the vessels.SOLUTION: A vessel comprises a hull, fuel gas consumption equipment installed in the hull, a fixed tank fixed to the hull and capable of supplying fuel to the fuel gas consumption equipment, and a tank loading section that can be detachably loaded with a portable tank loaded from outside the hull and capable of storing fuel that is supplied only to the fixed tank among the fuel gas consumption equipment and the fixed tank.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present disclosure relates to a ship and a fuel supply system for the ship. [Background technology]

[0002] For example, as disclosed in Patent Document 1, a ship that uses liquefied gas as fuel is equipped with a fuel tank capable of storing the liquefied gas. In such a ship, liquefied gas is loaded into the fuel tank prior to departure from a port. A bunker ship or a tank truck (vehicle) equipped with a tank capable of storing the liquefied gas is used to load the fuel tank. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2018-69934 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, as in Patent Document 1, in order to load liquefied gas from the tanks of a bunker ship or tank truck into the fuel tank of the ship, it is necessary to connect the tanks of the bunker ship or tank truck to the fuel tank of the ship with fuel piping (hoses), which takes time and effort. In addition, while loading liquefied gas from the tanks of the bunker ship or tank truck into the fuel tank of the ship, the ship cannot depart, and the ship's anchorage time is extended.

[0005] The present disclosure has been made to solve the above-mentioned problems, and aims to provide a ship and a fuel supply system for the ship that can efficiently load fuel onto the ship and shorten the ship's berthing time. [Means for solving the problem]

[0006] In order to solve the above problems, the ship disclosed herein comprises a hull, a fuel gas consuming device, a fixed tank, and a tank mounting section. The fuel gas consuming device is provided on the hull. The fixed tank is fixed to the hull and is capable of supplying fuel to the fuel gas consuming device. The tank mounting section removably mounts a portable tank that is loaded from outside the hull. The portable tank is capable of storing fuel to be supplied only to the fixed tank among the fuel gas consuming device and the fixed tank.

[0007] A fuel supply system for a marine vessel according to the present disclosure includes the marine vessel described above and a portable tank. The portable tank is mountable on the tank mounting section. Effect of the Invention

[0008] According to the ship and fuel supply system for the ship disclosed herein, fuel can be loaded onto the ship efficiently, and the ship's berthing time can be shortened. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a side view of a vessel and a fuel supply system for the vessel according to an embodiment of the present disclosure. [Diagram 2] FIG. 1 is a plan view illustrating a configuration of a fuel supply system for a marine vessel according to an embodiment of the present disclosure. [Diagram 3] 1 is a diagram showing a tank mounting section and a portable tank mounted on the tank mounting section in an embodiment of the present disclosure. [Figure 4] 4 is a side view of the tank mounting section and the portable tank shown in FIG. 3. [Diagram 5] FIG. 2 is a plan view showing a liquefied gas supply line connecting a fixed tank and a portable tank in an embodiment of the present disclosure. [Figure 6] FIG. 2 is a diagram showing a state in which liquefied gas as fuel is delivered from one portable tank to a fixed tank in a fuel supply system according to an embodiment of the present disclosure. [Figure 7]7 is a diagram showing a state in which liquefied gas as fuel is supplied from another portable tank to a fixed tank, different from that shown in FIG. 6, in the fuel supply system according to the embodiment of the present disclosure. FIG. [Figure 8] FIG. 11 is a diagram showing a connection state between a fixed tank and a portable tank in a second embodiment of the present disclosure. [Figure 9] FIG. 13 is a diagram showing a connection state between a fixed tank and a portable tank in a third embodiment of the present disclosure. [Figure 10] FIG. 13 is a diagram showing a connection state between a fixed tank and a portable tank in a fourth embodiment of the present disclosure. [Figure 11] 11 is a diagram showing a state in which the inside of the portable tank is pressurized through a pressurizing line in the configuration shown in FIG. 10. FIG. [Figure 12] 11 is a diagram showing a state in which the pressure in the portable tank is adjusted through a pressure adjustment line in the configuration shown in FIG. 10. FIG. [Figure 13] FIG. 13 is a diagram showing a connection state between a fixed tank and a portable tank in a modified example of the fourth embodiment of the present disclosure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] First Embodiment Hereinafter, a ship and a fuel supply system for the ship according to an embodiment of the present disclosure will be described with reference to FIGS. (Overall configuration of the ship) 1 and 2, the ship 1 of this embodiment at least includes a hull 2, a fixed tank 20, and a tank mounting section 30. The type of the ship 1 is not limited to a specific one. Examples of the type of the ship 1 include a carrier of liquefied gas such as liquefied natural gas (LNG), carbon dioxide, or ammonia, a cargo ship, a ferry, a RORO ship (Roll-on / Roll-off ship), a PCTC (Pure Car & Truck Carrier), a passenger ship, an observation / research ship, and the like.

[0011] (Hull configuration) The hull 2 ​​has a pair of side panels 3A, 3B that form its outer shell, a ship bottom 4, and an upper deck 5. The side panels 3A, 3B are made up of a pair of side panel shells that form the port and starboard sides, respectively. The ship bottom 4 is made up of a ship bottom panel that connects the side panels 3A, 3B. The upper deck 5 is a full-length deck that is exposed to the outside. In the hull 2, for example, a superstructure 7 having accommodation areas is formed on the upper deck 5 on the stern 2b side.

[0012] Fuel gas consuming equipment 8 is provided inside the hull 2. The fuel gas consuming equipment 8 is a device that generates thermal energy by burning fuel. Examples of the fuel gas consuming equipment 8 include an internal combustion engine used as a main engine for propelling the ship 1, an internal combustion engine used in a power generation facility that supplies electricity to the ship, and a boiler that generates steam as a working fluid.

[0013] The fixed tank 20 is provided, for example, on the upper deck 5. The fixed tank 20 is provided, for example, in the hull 2, closer to the stern 2b than the superstructure 7. The fixed tank 20 may also be provided in the hull 2, closer to the bow 2a than the superstructure 7. The fixed tank 20 may also be provided inside the hull 2.

[0014] The fixed tank 20 stores the fuel to be burned by the fuel gas consuming equipment 8. The fixed tank 20 of this embodiment can store liquefied gas, such as LNG (liquefied natural gas), LPG (liquefied petroleum gas), ammonia, hydrogen, etc., as the fuel to be burned by the fuel gas consuming equipment 8. The fixed tank 20 of this embodiment has, for example, a cylindrical shape extending horizontally and is provided so as to extend in the bow-stern direction FA. Furthermore, the shape of the fixed tank 20 is not limited to a cylindrical shape, and the fixed tank 20 may be, for example, spherical, rectangular, etc. The fixed tank 20 is connected to the fuel gas consuming equipment 8 via a fuel supply piping system 25. The fixed tank 20 is capable of supplying fuel to the fuel gas consuming equipment 8 via the fuel supply piping system 25.

[0015] (Tank mounting configuration) The tank mounting unit 30 detachably mounts a portable tank 40, which will be described later. The tank mounting unit 30 is provided, for example, on the upper deck 5. In this embodiment, the tank mounting unit 30 is provided, for example, between the superstructure 7 and the fixed tank 20. The installation position of the tank mounting unit 30 is not limited in any way, and for example, the tank mounting unit 30 may be provided on the bow 2a side of the superstructure 7 in the hull 2. In this embodiment, a plurality of tank mounting sections 30 are provided. As shown in Fig. 2, this embodiment illustrates a case in which, for example, four sets of tank mounting sections 30A to 30D are provided at intervals in the ship width direction Dw. The arrangement and number of the plurality of tank mounting sections 30 can be changed as appropriate.

[0016] Fig. 3 is a diagram showing a tank mounting unit and a portable tank mounted on the tank mounting unit in an embodiment of the present disclosure, Fig. 4 is a side view of the tank mounting unit and the portable tank shown in Fig. 3. As shown in Figures 3 and 4, each tank mounting section 30 is capable of mounting a portable tank 40 that is loaded from outside the hull 2. The tank mounting section 30 has a tank support surface 30f facing upward. When the portable tank 40 is mounted on the tank support surface 30f, the tank support surface 30f is capable of supporting the portable tank 40 from below. The tank support surface 30f may be provided with a protrusion or the like for fixing the portable tank 40.

[0017] 4, with the portable tank 40 placed on each tank mounting section 30, the portable tank 40 can be fixed to the tank mounting section 30 by a fastening member 100 such as a lashing rod. By using a lashing rod or the like used for fastening containers as the fastening member 100, the portable tank 40 can be easily attached to and detached from the tank mounting section 30.

[0018] FIG. 5 is a plan view showing a liquefied gas supply line connecting a fixed tank and a portable tank in an embodiment of the present disclosure. As shown in Fig. 5, the ship 1 is equipped with a liquefied gas supply line 50 that connects the portable tanks 40 mounted on each tank mounting section 30 to the fixed tank 20. The liquefied gas supply line 50 is capable of supplying liquefied gas in a liquid state from the portable tanks 40 mounted on the tank mounting section 30 to the fixed tank 20. For example, one end of the liquefied gas supply line 50 is fixedly connected to the fixed tank 20. The other end of the liquefied gas supply line 50 is detachably connected to the portable tank 40 mounted on the tank mounting section 30.

[0019] The liquefied gas supply line 50 is provided so as to be able to connect the portable tank 40 and the fixed tank 20 mounted on each of the multiple tank mounting sections 30. In this embodiment, the liquefied gas supply line 50 has a plurality of branch pipes 51 (51A-51D) branched into a plurality of pipes on the tank mounting section 30 side (the other end side). Each of the branch pipes 51A-51D is detachably connected to each of the portable tanks 40 mounted on the multiple tank mounting sections 30.

[0020] The vessel 1 further includes a connection switching unit 60. The connection switching unit 60 selectively connects the portable tank 40 and the fixed tank 20 mounted on any one of the tank mounting units 30 among the multiple tank mounting units 30. The connection switching unit 60 of this embodiment includes multiple on-off valves 61 (61A to 61D). The on-off valve 61A is provided on a branch pipe 51A connectable to the portable tank 40 mounted on the tank mounting unit 30A. The on-off valve 61B is provided on a branch pipe 51B connectable to the portable tank 40 mounted on the tank mounting unit 30B. The on-off valve 61C is provided on a branch pipe 51C connectable to the portable tank 40 mounted on the tank mounting unit 30C. The on-off valve 61D is provided on a branch pipe 51D connectable to the portable tank 40 mounted on the tank mounting unit 30D. The connection switching unit 60 selectively connects the portable tank 40 and the fixed tank 20 mounted on any one of the multiple tank mounting units 30 by opening any one of the on-off valves 61A to 61D and closing the other on-off valves 61.

[0021] (Configuration of portable tank) The portable tank 40 is loaded from outside the ship 2. In other words, the portable tank 40 does not constitute the ship 1. As shown in FIGS. 3 and 4, the portable tank 40 includes a tank body 41 and a container frame 42.

[0022] The tank body 41 is a pressure vessel and is capable of storing fuel therein. The tank body 41 is capable of storing liquefied gas as fuel to be supplied to the fixed tank 20. More specifically, the tank body 41 is connected to the fixed tank 20 via the liquefied gas supply line 50, and is thereby capable of storing fuel (liquefied gas) to be supplied only to the fixed tank 20 among the fuel gas consuming equipment 8 and the fixed tank 20. The tank body 41 of this embodiment is, for example, cylindrical and extends in the horizontal direction. Furthermore, the shape of the tank body 41 is not limited to a cylindrical shape, and may be, for example, a spherical shape, a rectangular shape, or the like.

[0023] The container frame 42 supports the tank body 41 via, for example, a support stand 44. The container frame 42 illustrated in this embodiment has external dimensions similar to those of a so-called 20-foot container or 40-foot container, which are ISO standard containers. This allows the portable tank 40 to be transported over land by a vehicle such as a trailer, and lifted by a lifting device (not shown) such as a crane, just like a 20-foot container or a 40-foot container.

[0024] The container frame 42 has, for example, a lower frame 42a, a plurality of support columns 42b, and an upper frame 42c. When viewed from the vertical direction Dv, the lower frame 42a is formed in a rectangular frame shape with a long side in a first direction Da intersecting the vertical direction Dv and a short side in a second direction (direction perpendicular to the paper surface of FIG. 3) intersecting the vertical direction Dv and the first direction Da. The plurality of support columns 42b are provided at least at four corners of the lower frame 42a. The support columns 42b may be provided at other positions in addition to the four corners of the lower frame 42a. Each support column 42b rises upward in the vertical direction Dv from the lower frame 42a. The upper frame 42c is provided on the plurality of support columns 42b. When viewed from the vertical direction Dv, the upper frame 42c is formed in a rectangular frame shape with a long side in the first direction Da and a short side in the second direction, similar to the lower frame 42a. The upper frame 42c connects the upper ends of the multiple supports 42b together. The container frame 42 can be fastened to the tank mounting section 30 by fastening members 100 such as lashing rods. The container frame 42 also has locking sections 43 for locking wire cables W or the like, and can be lifted by a lifting device. The configuration of the container frame 42 can be appropriately changed. The container frame 42 may be a hollow box. The tank body 41 is provided in the container frame 42.

[0025] The ship 1 and the portable tank 40 as described above constitute a fuel supply system 10A for the ship 1. In the fuel supply system 10A, liquefied gas as fuel is stored in advance in a tank body 41 of the portable tank 40 outside the ship 1. The portable tank 40 in which the liquefied gas is stored is loaded onto a vehicle such as a trailer, and carried into the port (quay) where the ship 1 is anchored. The portable tank 40 is then lifted by a lifting device, such as a crane provided at the port or a crane provided on the ship 1, and loaded onto the ship 1. The portable tank 40 is mounted on a tank mounting section 30 provided on the upper deck 5. In this embodiment, a plurality of tank mounting sections 30 are provided, and therefore a plurality of portable tanks 40 are sequentially mounted on the plurality of tank mounting sections 30. After each of the portable tanks 40 is mounted on the tank mounting section 30, the portable tanks 40 are secured with securing members 100. Thereafter, the portable tanks 40 and the fixed tank 20 are connected via a liquefied gas supply line 50. After the connection work of the liquefied gas supply line 50 is completed, the on-off valve 61 of the branch pipe 51 connected to the portable tank 40 is opened, thereby connecting the portable tank 40 and the fixed tank 20, and the liquefied gas stored in the portable tank 40 is supplied to the fixed tank 20.

[0026] Fig. 6 is a diagram showing a state in which liquefied gas as fuel is delivered from one portable tank to a fixed tank in the fuel supply system according to the embodiment of the present disclosure. Fig. 7 is a diagram showing a state in which liquefied gas as fuel is delivered from another portable tank, different from that shown in Fig. 6, to a fixed tank in the fuel supply system according to the embodiment of the present disclosure. 6, for example, by opening the on-off valve 61A and closing the other on-off valves 61B to 61D in the connection switching unit 60, the portable tank 40 mounted on one tank mounting unit 30A and the fixed tank 20 are connected through the branch pipe 51A provided with the on-off valve 61A. As a result, liquefied gas as fuel is supplied from the portable tank 40 mounted on one tank mounting unit 30A to the fixed tank 20.

[0027] 7, for example, by opening the on-off valve 61B and closing the other on-off valves 61A, 61C, and 61D, the portable tank 40 mounted on another tank mounting unit 30B different from that shown in FIG. 6 is connected to the fixed tank 20 through the branch pipe 51B provided with the on-off valve 61B. As a result, liquefied gas as fuel is supplied from the portable tank 40 mounted on the other tank mounting unit 30B to the fixed tank 20.

[0028] Similarly, by opening the on-off valve 61C and closing the other on-off valves 61A, 61B, and 61D, the portable tank 40 mounted on the other tank mounting unit 30C is connected to the fixed tank 20 through the branch pipe 51C provided with the on-off valve 61C. This allows liquefied gas as fuel to be supplied from the portable tank 40 mounted on the other tank mounting unit 30C to the fixed tank 20. By opening the on-off valve 61D and closing the other on-off valves 61A, 61B, and 61C, the portable tank 40 mounted on the further tank mounting section 30D is connected to the fixed tank 20 through the branch pipe 51D provided with the on-off valve 61D. This allows liquefied gas as fuel to be supplied from the portable tank 40 mounted on the further tank mounting section 30D to the fixed tank 20. In this way, by sequentially switching the opening and closing of the on-off valves 61A to 61D using the connection switching unit 60, liquefied gas can be sequentially supplied from the portable tank 40 mounted on any one of the multiple tank mounting units 30 to the fixed tank 20.

[0029] Here, when portable tanks 40 are sequentially mounted on multiple tank mounting sections 30, the supply of liquefied gas to the fixed tank 20 may be started from a portable tank 40 that has been secured to the tank mounting section 30 and connected to the liquefied gas supply line 50, even if the mounting of the other portable tanks 40 has not been completed. In addition, after all of the portable tanks 40 have been loaded onto the tank mounting section 30 and secured, the ship 1 may depart from the port even if the connection of the portable tanks 40 to the liquefied gas supply line 50 has not been completed.

[0030] (Action and effect) The ship 1 and the fuel supply system 10A for the ship 1 according to the above embodiment are provided with a tank mounting unit 30 on which a portable tank 40 is detachably mounted. Therefore, the portable tank 40, which is previously filled with liquefied gas as fuel, is carried in from outside the ship and mounted on the tank mounting unit 30, so that the liquefied gas stored in the portable tank 40 mounted on the tank mounting unit 30 can be supplied to the fixed tank 20. In order to supply liquefied gas from the portable tank 40 to the fixed tank 20, it is necessary to connect the portable tank 40 and the fixed tank 20, but this connection work can be performed on the ship. In addition, the supply of liquefied gas from the portable tank 40 to the fixed tank 20 can also be performed on the ship. Therefore, the connection work between the portable tank 40 and the fixed tank 20 and the supply of liquefied gas can be performed even after the ship 1 has departed. This prevents the ship 1 from being hindered from leaving due to the work of connecting the piping and the work of supplying liquefied gas. As a result, the liquefied gas can be loaded onto the ship 1 efficiently, and the time the ship 1 is anchored can be shortened.

[0031] In addition, in the above embodiment, the ship 1 is provided with the liquefied gas supply line 50, and by connecting the portable tank 40 mounted on the tank mounting section 30 to the fixed tank 20 via the liquefied gas supply line 50, it is possible to supply liquefied gas in a liquid state from the portable tank 40 to the fixed tank 20. This makes it possible to efficiently connect the portable tank 40 and the fixed tank 20.

[0032] In the above embodiment, the liquefied gas supply line 50 is provided so as to be able to connect the portable tank 40 and the fixed tank 20 mounted on each of the multiple tank mounting units 30. The connection switching unit 60 selectively connects the portable tank 40 and the fixed tank 20 mounted on any one of the multiple tank mounting units 30. As a result, the connection switching unit 60 first connects the portable tank 40 mounted on one tank mounting unit 30 and the fixed tank 20 among the multiple portable tanks 40 mounted on the multiple tank mounting units 30, thereby supplying liquefied gas in a liquid state from the portable tank 40 mounted on the one tank mounting unit 30 to the fixed tank 20. Thereafter, the connection switching unit 60 connects the portable tank 40 and the fixed tank 20 mounted on the other tank mounting unit 30 among the multiple portable tanks 40 mounted on the multiple tank mounting units 30, thereby supplying liquefied gas in a liquid state from the portable tank 40 mounted on the other tank mounting unit 30 to the fixed tank 20. In this manner, liquefied gas in a liquid state can be sequentially supplied to the fixed tank 20 from a plurality of portable tanks 40 mounted on a plurality of tank mounting sections 30. Furthermore, by mounting a plurality of portable tanks 40 on a plurality of tank mounting sections 30, it is possible to increase the total amount of liquefied gas as fuel mounted on the ship 1. This allows the plurality of portable tanks 40 to function as, so to speak, auxiliary tanks, and it is also possible to reduce the size of the fixed tank 20 by the amount of the liquefied gas stored in the plurality of portable tanks 40.

[0033] In the above embodiment, the container frame 42 of the portable tank 40 is lifted by a lifting device, thereby enabling the portable tank 40 to be loaded onto and unloaded from the ship 1. Furthermore, the container frame 42 of the portable tank 40 is fastened to the tank mounting section 30, thereby enabling the portable tank 40 to be detachably mounted on the tank mounting section 30. Such a container frame 42 can have the same structure as a so-called container, and can be easily realized at low cost.

[0034] Second Embodiment Next, a second embodiment of the ship and the fuel supply system for the ship according to the present disclosure will be described. In the second embodiment described below, the connection state between the portable tank 40 mounted on the tank mounting unit 30 and the fixed tank 20 is different from that of the first embodiment, so the same parts as those in the first embodiment are denoted by the same reference numerals and will not be described again. FIG. 8 is a diagram showing a connection state between a fixed tank and a portable tank in the second embodiment of the present disclosure. 8, in the ship 1 and the fuel supply system 10B for the ship 1 of this embodiment, the tank mounting unit 30P mounts the portable tank 40 at a position higher in the vertical direction Dv than the fixed tank 20. For example, when the tank mounting unit 30P is provided on the upper deck 5 and the fixed tank 20 is provided inside the hull 2 ​​below the upper deck 5, the tank mounting unit 30P mounts the portable tank 40 at a position higher in the vertical direction Dv than the fixed tank 20. Even when the fixed tank 20 is provided on the upper deck 5, the tank support surface 30f of the tank mounting unit 30P may be provided at a position higher in the vertical direction Dv than the fixed tank 20.

[0035] The fixed tank 20 and the portable tank 40 mounted on the tank mounting section 30P are connected by a liquefied gas supply line 50P and a gas return line 52P. The liquefied gas delivery line 50P is provided to communicate the liquid phase in the fixed tank 20 with the liquid phase in the portable tank 40 mounted on the tank mounting part 30P. An opening / closing valve 61P is provided on the liquefied gas delivery line 50P. The gas return line 52P is provided to communicate the gas phase in the fixed tank 20 with the gas phase in the portable tank 40 mounted on the tank mounting portion 30P. An opening / closing valve 62P is provided on the gas return line 52P.

[0036] When the on-off valves 61P and 62P are opened, the liquefied gas in liquid state in the portable tank 40 is sent by gravity to the liquid phase of the fixed tank 20 below. When the liquid level of the liquid phase in the fixed tank 20 rises due to the liquefied gas in liquid state being sent to the fixed tank 20, the liquefied gas in gas state in the fixed tank 20 is pushed out of the fixed tank 20. The pushed-out liquefied gas in gas state is returned to the gas phase in the portable tank 40 above through the gas return line 52P. In other words, the gas phase of the fixed tank 20 and the gas phase of the portable tank 40 are equalized in pressure.

[0037] (Action and effect) According to the above-mentioned second embodiment of the ship 1 and the fuel supply system 10B for the ship 1, the tank mounting section 30P mounts the portable tank 40 at a higher position in the vertical direction Dv than the fixed tank 20, so that liquefied gas in a liquid state can be efficiently supplied from the portable tank 40 to the fixed tank 20 by utilizing gravity.

[0038] In the ship 1 and the fuel supply system 10B for the ship 1 according to the second embodiment, as in the first embodiment, the ship 1 can be efficiently loaded with liquefied gas and the anchoring time of the ship 1 can be shortened.

[0039] Here, when multiple portable tanks 40 are connected to the fixed tank 20, the on-off valve 61P is opened only in the liquefied gas supply line 50P connected to the portable tank 40 that supplies liquefied gas to the fixed tank 20. In the gas return line 52P, the on-off valve 62P may be opened only in the gas return line 52P connected to the portable tank 40 that returns the liquefied gas in a gas state in the fixed tank 20. Also, the on-off valve 62P may be opened in the gas return line 52P connected to the multiple portable tanks 40. This allows the gas phase in the fixed tank 20 to communicate with the gas phases in the multiple portable tanks 40, and the pressure in the multiple portable tanks 40 can be adjusted.

[0040] <Third embodiment> Next, a third embodiment of the ship and the fuel supply system for the ship according to the present disclosure will be described. In the third embodiment described below, the connection state between the portable tank 40 mounted on the tank mounting unit 30 and the fixed tank 20 is different from that of the first and second embodiments, so the same parts as those of the first and second embodiments are denoted by the same reference numerals and will not be described again. FIG. 9 is a diagram showing a connection state between a fixed tank and a portable tank in the third embodiment of the present disclosure. As shown in FIG. 9, a boat 1 and a fuel supply system 10C for the boat 1 according to the third embodiment include a pressurized line 70Q and a depressurized line 80Q.

[0041] The pressurized line 70Q feeds gas at a pressure higher than the pressure inside the portable tank 40 to the portable tank 40 mounted on the tank mounting unit 30. The pressurized line 70Q of this embodiment feeds the liquefied gas in a gaseous state supplied from the fixed tank 20 to the fuel gas consuming device 8 into the gas phase of the portable tank 40. The liquefied gas in a gaseous state supplied from the fixed tank 20 to the fuel gas consuming device 8 is pressurized by a pump (not shown) and further vaporized by an evaporator (not shown) to a predetermined pressure higher than the pressure inside the portable tank 40. In addition, when feeding gas at a pressure higher than the pressure inside the portable tank 40 to the portable tank 40 through the pressurized line 70Q, the pressures inside the fixed tank 20 and the portable tank 40 may be equalized in advance. In this way, by pumping liquefied gas in a gaseous state at a pressure higher than the pressure inside the portable tank 40 through the pressurized line 70Q into the gas phase inside the portable tank 40, the liquefied gas in a liquid state inside the portable tank 40 is pumped into the fixed tank 20 through the liquefied gas supply line 50.

[0042] The decompression line 80Q discharges the liquefied gas in a gaseous state from the fixed tank 20 to the outside of the fixed tank 20. The decompression line 80Q is connected to, for example, a fuel gas consuming device 8, a gas combustion device (not shown) that burns surplus gas, etc. The liquefied gas in a gaseous state from the fixed tank 20 can be supplied to the fuel gas consuming device 8, the gas combustion device (not shown), etc. through the decompression line 80Q and burned, thereby reducing the pressure inside the fixed tank 20. In this manner, a pressure difference can be created between the portable tank 40 and the fixed tank 20. In the above description of the third embodiment, an example was given of a case in which both pressurization of the portable tank 40 via the pressurization line 70Q and depressurization of the fixed tank 20 via the depressurization line 80Q are performed, but by performing at least one of them, liquefied gas can be sent from the portable tank 40 to the fixed tank 20. In addition, in the above third embodiment, an example was given of the case where the pressurized line 70Q sends the gaseous liquefied gas supplied from the fixed tank 20 to the fuel gas consuming equipment 8 to the gas phase of the portable tank 40, but the liquefied gas sent to the gas phase of the portable tank 40 is not limited to the gaseous liquefied gas supplied from the fixed tank 20 to the fuel gas consuming equipment 8.

[0043] (Action and effect) According to the ship 1 and fuel supply system 10C for the ship 1 of the above-mentioned third embodiment, gas at a pressure higher than the pressure inside the portable tank 40 is sent to the portable tank 40 via the pressurized line 70Q, thereby enabling efficient supply of liquefied gas in a liquid state from the portable tank 40 to the fixed tank 20.

[0044] Furthermore, when the pressurized line 70Q of the third embodiment sends the liquefied gas in a gaseous state in the fixed tank 20 to the portable tank 40, the liquefied gas in a liquid state can be efficiently supplied from the portable tank 40 to the fixed tank 20. Furthermore, when the liquefied gas in a gaseous state in the fixed tank 20 is used as a gas with a higher pressure than the pressure in the portable tank 40, the need to provide a pump or the like for transferring the liquefied gas in a liquid state from the portable tank 40 to the fixed tank 20 is reduced.

[0045] In the ship 1 and fuel supply system 10C for the ship 1 according to the third embodiment, as in the first and second embodiments, the ship 1 can be efficiently loaded with liquefied gas and the anchorage time of the ship 1 can be shortened.

[0046] <Fourth embodiment> Next, a fourth embodiment of the ship and the fuel supply system for the ship according to the present disclosure will be described. In the fourth embodiment described below, the connection state between the portable tank 40 mounted on the tank mounting unit 30 and the fixed tank 20 is different from that of the first to third embodiments, so the same parts as those of the first to third embodiments are denoted by the same reference numerals and will not be described again. FIG. 10 is a diagram showing a connection state between a fixed tank and a portable tank in the fourth embodiment of the present disclosure. As shown in FIG. 10, a boat 1 and a fuel supply system 10D for the boat 1 according to the fourth embodiment include a pressurized line 70R, a depressurized line 80R, and a pressure adjustment line 90R.

[0047] The pressurized line 70R feeds gas at a pressure higher than the pressure inside the portable tank 40 to the portable tank 40 mounted on the tank mounting unit 30. The pressurized line 70R in this embodiment is provided to communicate between the gas phase inside the portable tank 40 and a fuel supply piping system 25R that supplies liquefied gas as fuel to the fuel gas consuming device 8.

[0048] The fuel supply piping system 25R is provided with a gas vaporization unit 27. The gas vaporization unit 27 vaporizes the liquefied gas in the fixed tank 20 and supplies the gas to the fuel gas consuming device 8. The gas vaporization unit 27 includes a pump 28 and an evaporator 29. The pump 28 pressurizes the liquefied gas in a liquid state supplied from the liquid phase in the fixed tank 20. The evaporator 29 evaporates and vaporizes the pressurized liquefied gas in a liquid state. In this way, the pressure of the liquefied gas in a gas state vaporized by the gas vaporization unit 27 is made higher than the pressure of the gas phase in the portable tank 40. The pressurized line 70R is provided with an on-off valve 71R. When the on-off valve 71R is opened, the gas phase in the portable tank 40 communicates with the fuel supply piping system 25R.

[0049] The decompression line 80R discharges the liquefied gas in a gaseous state from the fixed tank 20 to the outside of the fixed tank 20. The decompression line 80R is connected to, for example, a fuel gas consuming device 8. The liquefied gas in a gaseous state from the fixed tank 20 is supplied to the fuel gas consuming device 8 through the decompression line 80R and combusted as liquefied gas, thereby reducing the pressure inside the fixed tank 20.

[0050] The pressure adjustment line 90R is provided to communicate the pressurized line 70R and the depressurized line 80R. One end of the pressure adjustment line 90R is connected to the pressurized line 70R on the portable tank 40 side of the on-off valve 71R. The pressure adjustment line 90R is provided with an on-off valve 91R.

[0051] FIG. 11 is a diagram showing a state in which the inside of the portable tank is pressurized through a pressurizing line in the configuration shown in FIG. 11, the on-off valve 91R is closed when the on-off valve 71R of the pressurizing line 70R is opened and the inside of the portable tank 40 is pressurized. When the on-off valve 71R is opened, the gas phase in the portable tank 40 is communicated with the fuel supply piping system 25R, so that at least a part of the liquefied gas in a gaseous state vaporized in the gas vaporizing unit 27 is sent through the pressurizing line 70R to the gas phase of the portable tank 40. As a result, the inside of the portable tank 40 is pressurized, and the liquefied gas in a liquid state is efficiently supplied from the portable tank 40 to the fixed tank 20 through the liquefied gas supply line 50R.

[0052] FIG. 12 is a diagram showing a state in which the pressure in the portable tank is adjusted through a pressure adjustment line in the configuration shown in FIG. 12, the on-off valve 91R is opened as necessary when the on-off valve 71R is closed and the inside of the portable tank 40 is not pressurized. By opening the on-off valve 91R, the gas phase of the fixed tank 20 and the gas phase of the portable tank 40 are communicated through the pressure adjustment line 90R, and the pressures inside the fixed tank 20 and the portable tank 40 are equalized. In addition, when the pressure inside the portable tank 40 is higher than the pressure inside the reduced pressure line 80R, the liquefied gas in a gaseous state inside the portable tank 40 can also be supplied to the fuel gas consuming device 8 through the pressure adjustment line 90R.

[0053] (Action and effect) According to the above-mentioned fourth embodiment of the ship 1 and the fuel supply system 10D for the ship 1, gas at a pressure higher than the pressure inside the portable tank 40 is sent to the portable tank 40 via the pressurized line 70R, thereby efficiently supplying liquefied gas in a liquid state from the portable tank 40 to the fixed tank 20.

[0054] In the fourth embodiment, the pressurized line 70R sends the gaseous liquefied gas obtained by vaporizing the liquefied gas in the fixed tank 20 to the portable tank 40, so that the liquefied gas in the liquid state can be efficiently supplied from the portable tank 40 to the fixed tank 20. In addition, the pump 28 for fuel supply is used to prepare gas at a pressure higher than the pressure in the portable tank 40, so that the need to provide a separate pump or the like for preparing high pressure gas is reduced. In addition, the pressure difference between the portable tank 40 and the fixed tank 20 is utilized to supply the liquefied gas in the liquid state from the portable tank 40 to the fixed tank 20. Therefore, the need to provide a pump or the like for transferring the liquefied gas in the liquid state from the portable tank 40 to the fixed tank 20 is reduced.

[0055] In the ship 1 and the fuel supply system 10D for the ship 1 according to the fourth embodiment, like the first to third embodiments, the ship 1 can efficiently load liquefied gas and shorten the anchorage time of the ship 1.

[0056] (Modification of the fourth embodiment) FIG. 13 is a diagram showing a connection state between a fixed tank and a portable tank in a modified example of the fourth embodiment of the present disclosure. As shown in FIG. 13, the boat 1 and the fuel supply system 10E for the boat 1 in the modified example of the fourth embodiment include a pressurized line 70R, a depressurized line 80R, and a pressure adjustment line 90S.

[0057] The pressure regulation line 90S of this modification is provided to communicate the gas phase in the portable tank 40 with the decompression line 80R. The pressure regulation line 90S of this modification is provided separately from the pressurization line 70R. An on-off valve 91S is provided in the pressure regulation line 90S. By opening the on-off valve 91S, the gas phase in the fixed tank 20 and the gas phase in the portable tank 40 are communicated through the pressure regulation line 90S, and the pressure in the fixed tank 20 and the pressure in the portable tank 40 are equalized. In addition, when the pressure in the portable tank 40 is higher than the pressure in the decompression line 80R, the liquefied gas in the gas state in the portable tank 40 can also be supplied to the fuel gas consuming device 8 through the pressure regulation line 90S.

[0058] In this case, since the pressure adjustment line 90S is provided separately and independently from the pressurized line 70R, even when the gas phase in the portable tank 40 is being pressurized by the pressurized line 70R, the pressure of the gas phase in another portable tank 40 can be adjusted through the pressure adjustment line 90S.

[0059] (Other embodiments) Although the embodiments of the present disclosure have been described in detail above with reference to the drawings, the specific configuration is not limited to this embodiment, and design changes and the like that do not depart from the gist of the present disclosure are also included. Although the second to fourth embodiments and their modifications have been described above, these configurations can also be appropriately combined. Furthermore, the procedure for supplying liquefied gas from the portable tank 40 to the fixed tank 20 is not limited to the one described above, and can be modified as appropriate.

[0060] <Additional Notes> The boat 1 and the fuel supply systems 10A to 10E for the boat 1 described in each embodiment can be understood, for example, as follows.

[0061] (1) The ship 1 in the first embodiment comprises a hull 2, a fuel gas consuming equipment 8 provided on the hull 2, a fixed tank 20 fixed to the hull 2 ​​and capable of supplying liquefied gas to the fuel gas consuming equipment 8, and a tank mounting section 30, 30P that detachably mounts a portable tank 40 that is loaded from outside the hull 2 ​​and is capable of storing liquefied gas to be supplied only to the fixed tank 20 among the fuel gas consuming equipment 8 and the fixed tank 20. Examples of the fuel gas consuming equipment 8 include an internal combustion engine and a boiler.

[0062] As a result, the portable tank 40 in which liquefied gas has been stored in advance is brought in from outside the ship and mounted on the tank mounting section 30, 30P, and the liquefied gas stored in the portable tank 40 mounted on the tank mounting section 30, 30P can be supplied to the fixed tank 20. In order to supply liquefied gas from the portable tank 40 to the fixed tank 20, it is necessary to connect the portable tank 40 and the fixed tank 20, and this connection work can be performed on the ship. In addition, the supply of liquefied gas from the portable tank 40 to the fixed tank 20 can also be performed on the ship. Therefore, the connection work between the portable tank 40 and the fixed tank 20 and the supply of liquefied gas can be performed even after the ship 1 has departed. This prevents the ship 1 from being hindered from leaving due to the work of connecting the piping and the work of supplying liquefied gas. As a result, the liquefied gas can be loaded efficiently onto the ship 1, and the anchorage time of the ship 1 can be shortened.

[0063] (2) The ship 1 of the second aspect is the ship 1 of (1), wherein the fuel is liquefied gas, and further includes a liquefied gas supply line 50 that supplies the liquefied gas in liquid state from the portable tank 40 mounted on the tank mounting section 30, 30P to the fixed tank 20.

[0064] As a result, by connecting the portable tank 40 mounted on the tank mounting section 30, 30P to the fixed tank 20 with the liquefied gas supply line 50, it is possible to supply liquefied gas in a liquid state from the portable tank 40 to the fixed tank 20. Therefore, the connection work between the portable tank 40 and the fixed tank 20 can be performed efficiently.

[0065] (3) The ship 1 of the third aspect is the ship 1 of (2), wherein the liquefied gas supply line 50 is configured to be able to connect the portable tank 40 mounted on each of the multiple tank mounting sections 30, 30P to the fixed tank 20, and further includes a connection switching section 60 that selectively connects the portable tank 40 mounted on any one of the multiple tank mounting sections 30, 30P to the fixed tank 20.

[0066] As a result, the connection switching unit 60 first connects the portable tank 40 mounted on one tank mounting unit 30, 30P to the fixed tank 20 among the multiple portable tanks 40 mounted on the multiple tank mounting units 30, 30P, so that liquefied gas in a liquid state can be supplied from the portable tank 40 mounted on one tank mounting unit 30, 30P to the fixed tank 20. Then, the connection switching unit 60 connects the portable tank 40 mounted on another tank mounting unit 30, 30P to the fixed tank 20 among the multiple portable tanks 40 mounted on the multiple tank mounting units 30, 30P, so that liquefied gas in a liquid state can be supplied from the portable tank 40 mounted on the other tank mounting unit 30, 30P to the fixed tank 20. In this way, liquefied gas in a liquid state can be sequentially supplied from the multiple portable tanks 40 mounted on the multiple tank mounting units 30, 30P to the fixed tank 20.

[0067] (4) The ship 1 according to a fourth aspect is the ship 1 according to (2) or (3), in which the tank mounting section 30P mounts the portable tank 40 at a position higher than the fixed tank 20 in the vertical direction Dv.

[0068] This allows the liquefied gas in a liquid state to be efficiently supplied from the portable tank 40 to the fixed tank 20 by utilizing gravity.

[0069] (5) The ship 1 in the fifth aspect is the ship 1 of (2) or (3), further comprising pressurized lines 70Q, 70R that supply gas at a pressure higher than the pressure inside the portable tank 40 to the portable tank 40 mounted on the tank mounting section 30, 30P.

[0070] This allows the liquefied gas in liquid state to be efficiently supplied from the portable tank 40 to the fixed tank 20.

[0071] (6) The ship 1 in the sixth aspect is the ship 1 of (5), wherein the pressurized lines 70Q, 70R send the liquefied gas in gaseous state in the fixed tank 20 to the portable tank 40 mounted on the tank mounting section 30, 30P.

[0072] This allows efficient supply of liquefied gas in a liquid state from the portable tank 40 to the fixed tank 20. In addition, by using the liquefied gas in a gaseous state in the fixed tank 20 as gas with a higher pressure than the pressure in the portable tank 40, the need to provide a separate pump or the like for preparing high-pressure gas is reduced.

[0073] (7) The ship 1 according to a seventh aspect is the ship 1 according to (5), further comprising a gas vaporization unit 27 that vaporizes the liquefied gas in the fixed tank 20 and supplies the gas to the fuel gas consuming equipment 8, The pressurized line 70Q sends at least a portion of the liquefied gas in a gaseous state vaporized in the gas vaporization section 27 to the portable tank 40.

[0074] This allows efficient supply of liquefied gas in a liquid state from the portable tank 40 to the fixed tank 20. In addition, by using the liquefied gas in a gaseous state vaporized by the gas vaporizer 27 as a gas with a pressure higher than the pressure inside the portable tank 40, the need to provide a separate pump or the like for preparing high-pressure gas is reduced.

[0075] (8) A fuel supply system 10A to 10E for a ship 1 according to an eighth aspect includes any one of the ships 1 according to (1) to (7) and a portable tank 40 mountable on the tank mounting section 30, 30P.

[0076] This allows the connection work between the portable tank 40 and the fixed tank 20 and the supply work of liquefied gas to be performed even after the ship 1 has departed. This prevents the ship 1 from being hindered from departing due to the work of connecting the pipes and the work of supplying liquefied gas. As a result, the loading of liquefied gas onto the ship 1 can be performed efficiently, and the anchorage time of the ship 1 can be shortened.

[0077] (9) The ninth aspect of the fuel supply system 10A to 10E for a ship 1 is the fuel supply system 10 for a ship 1 of (8), in which the portable tank 40 includes a tank body 41 capable of storing the liquefied gas, and a container frame 42 that supports the tank body 41, can be secured to the tank mounting section 30, 30P, and can be lifted by a lifting device.

[0078] As a result, by lifting the container frame 42 of the portable tank 40 with a lifting device, the portable tank 40 can be loaded onto and unloaded from the ship 1. Furthermore, by fastening the container frame 42 of the portable tank 40 to the tank mounting sections 30, 30P, the portable tank 40 can be detachably mounted on the tank mounting sections 30, 30P. Such a container frame 42 can have the same structure as a so-called container, and can be easily realized at low cost. [Explanation of symbols]

[0079] 1...ship 2...hull 2a...bow 2b...stern 3A, 3B...shipside 4...bottom 5...upper deck 7...superstructure 8...fuel gas consuming equipment 10A-10E...fuel supply system 20...fixed tank 25, 25R...fuel supply piping system 27...gas vaporization section 28...pump 29...evaporator 30, 30A-30D, 30P...tank mounting section 30f...tank support surface 40...portable tank 41...tank body 42...container frame 42a...lower frame 42b...support 42c...upper frame 43...locking section 44...support stand 50, 50P, 50R...liquefied gas supply line 51, 51A-51D...branch pipe 52P...gas return line 60...connection switching section 61, 61A to 61D, 61P, 62P...on-off valves 70Q, 70R...pressurized lines 71R...on-off valves 80Q, 80R...decompressed lines 90R, 90S...pressure adjustment lines 91R, 91S...on-off valves 100...fastening member W...wire cable

Claims

1. The hull and A fuel gas consuming device provided on the hull; A fixed tank that is fixed to the hull and is capable of supplying fuel to the fuel gas consumer; a tank mounting section for detachably mounting a portable tank that is loaded from outside the hull and is capable of storing fuel to be supplied only to the fixed tank among the fuel gas consuming equipment and the fixed tank; A vessel equipped with:

2. the fuel is a liquefied gas; The portable tank mounted on the tank mounting section further includes a liquefied gas supply line for supplying the liquefied gas in a liquid state to the fixed tank.

2. The watercraft of claim 1.

3. The tank mounting portion includes a plurality of tank mounting portions, the liquefied gas supply line is provided so as to be able to connect the portable tank and the fixed tank mounted on each of the plurality of tank mounting sections, The tank mounting unit further includes a connection switching unit that selectively connects the portable tank and the fixed tank mounted on any one of the plurality of tank mounting units.

3. The watercraft of claim 2.

4. The tank mounting unit mounts the portable tank at a position vertically higher than the fixed tank.

4. A vessel as claimed in claim 2 or 3.

5. The portable tank mounted on the tank mounting section further includes a pressurized line for supplying gas at a pressure higher than the pressure inside the portable tank.

4. A vessel as claimed in claim 2 or 3.

6. The pressurized line sends the liquefied gas in a gaseous state in the fixed tank to the portable tank mounted on the tank mounting section.

6. A watercraft as claimed in claim 5.

7. A gas vaporizer that vaporizes the liquefied gas in the fixed tank and supplies it to the fuel gas consuming device, The pressurized line sends at least a portion of the liquefied gas in a gaseous state vaporized in the gas vaporizing section to the portable tank.

6. A watercraft as claimed in claim 5.

8. A vessel according to claim 1; A portable tank that can be mounted on the tank mounting section. Fuel supply system for ships.

9. The portable tank comprises: A tank body capable of storing the fuel; a container frame that supports the tank body, can be fastened to the tank mounting part, and can be lifted by a lifting device.

9. A fuel supply system for a marine vessel according to claim 8.

Images