Ship and system for supplying fuel to ship

Abstract

A ship is provided with: a hull; gas fuel consumption equipment arranged on the ship body; a fixed tank fixed to the hull and capable of supplying fuel to the gas fuel consuming equipment; and a tank mounting unit that detachably mounts a movable tank that is mounted from the outside of the hull and that can store fuel supplied only to the fixed tank, among the gas fuel consumption equipment and the fixed tank.

Description

TECHNICAL FIELD

[0001] The present application relates to a ship and a fuel supply system to a ship.

[0002] This application claims priority based on Patent Application No. 2023-142431 filed in Japan on September 1, 2023, and incorporates its content herein. BACKGROUND

[0003] For example, as disclosed in Patent Literature 1, a ship that uses liquefied gas as fuel is provided with a fuel tank that can store liquefied gas. In such a ship, liquefied gas is loaded in the fuel tank before departure from a port. A bunker ship or a tank lorry (vehicle) that is provided with a tank that can store liquefied gas is used for loading in the fuel tank.

[0004] PRIOR ART DOCUMENTS

[0005] PATENT LITERATURE

[0006] Patent Literature 1: Japanese Patent Application Publication No. 2018-69934 SUMMARY

[0007] PROBLEMS TO BE SOLVED BY THE INVENTION

[0008] However, as in Patent Literature 1, if liquefied gas is to be loaded from the tank of the bunker ship or the tank lorry to the fuel tank of the ship, it is necessary to connect the tank of the bunker ship or the tank lorry and the fuel tank of the ship with a fuel pipe (hose), and thus it is time-consuming and laborious. Also, during the period in which liquefied gas is loaded from the tank of the bunker ship or the tank lorry to the fuel tank of the ship, the ship cannot be put to sea, and thus the time of mooring of the ship becomes longer.

[0009] The present application has been achieved in order to solve the above problems, and has an object to provide a ship and a fuel supply system to a ship that can efficiently perform fuel loading to a ship and shorten the time of mooring of the ship.

[0010] MEANS FOR SOLVING THE PROBLEMS

[0011] In order to solve the above problems, a ship according to the present application is provided with a hull, a gaseous fuel consuming device, a fixed tank, and a tank mounting portion. The gaseous fuel consuming device is provided to the hull. The fixed tank is fixed to the hull and can supply fuel to the gaseous fuel consuming device. The tank mounting portion can detachably mount a movable tank that is loaded from the outside of the hull. The movable tank can store fuel that is supplied only to the fixed tank among the gaseous fuel consuming device and the fixed tank.

[0012] The fuel supply system to a ship according to the present application is provided with the ship and the movable tank as described above. The movable tank can be mounted on the tank mounting portion.

[0013] Effects of the Invention

[0014] The ship and the fuel supply system to a ship according to the present application can efficiently perform fuel loading to a ship and shorten the berthing time of a ship. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a side view of a ship and a fuel supply system to a ship according to an embodiment of the present application.

[0016] Figure 2 is a plan view showing the structure of a fuel supply system to a ship according to an embodiment of the present application.

[0017] Figure 3 is a view showing a tank mounting portion and a movable tank mounted on the tank mounting portion in an embodiment of the present application.

[0018] Figure 4 is Figure 3 a side view of the tank mounting portion and the movable tank shown in FIG. 8.

[0019] Figure 5 is a plan view showing a liquefied gas feed line connecting a fixed tank and a movable tank in an embodiment of the present application.

[0020] Figure 6 is a view showing a state in which liquefied gas as fuel is fed from one movable tank to a fixed tank in a fuel supply system in an embodiment of the present application.

[0021] Figure 7 is a view showing a state in which liquefied gas as fuel is fed from another movable tank to the fixed tank in the fuel supply system in an embodiment of the present application. Figure 6

[0022] Figure 8 is a view showing the connection state of a fixed tank and a movable tank in a second embodiment of the present application.

[0023] Figure 9 is a view showing the connection state of a fixed tank and a movable tank in a third embodiment of the present application.

[0024] Figure 10 is a view showing the connection state of a fixed tank and a movable tank in a fourth embodiment of the present application.

[0025] Figure 11 is a view showing a state in which liquefied gas as fuel is fed from one movable tank to a fixed tank in a fuel supply system in an embodiment of the present application. Figure 10 ​The illustrated structure is a view showing a state in which the pressure inside the movable tank is adjusted by the pressure adjustment line.

[0026] Figure 12 is a view showing a state in which the pressure inside the movable tank is adjusted by the pressure adjustment line. Figure 10 The illustrated structure is a view showing a state in which the pressure inside the movable tank is adjusted by the pressure adjustment line.

[0027] Figure 13 is a view showing a state in which the pressure inside the movable tank is adjusted by the pressure adjustment line. DETAILED DESCRIPTION

[0028] <First Embodiment>

[0029] Hereinafter, with reference to Figures 1-13 , a ship, a fuel supply system to the ship, which are related to an embodiment of the present application, will be described.

[0030] (Overall structure of the ship)

[0031] As shown in Figure 1 , Figure 2 , the ship 1 of the present embodiment is provided with at least a hull 2, a fixed tank 20, and a tank mounting portion 30. The kind of the ship 1 is not particularly limited. The kind of the ship 1 can be exemplified by a liquefied gas such as liquefied natural gas (LNG), carbon dioxide, 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 / survey ship, and the like.

[0032] (Structure of the hull)

[0033] The hull 2 has a pair of sides 3A, 3B, a bottom 4, and a deck 5, which are outer shells thereof. The sides 3A, 3B are constituted by a pair of side plating plates that form left and right sides. The bottom 4 is constituted by a bottom plating plate that connects the sides 3A, 3B. The deck 5 is an all-through deck that is exposed to the outside. An upper structure 7 having a residential area is formed on the hull 2, for example, on the deck 5 on the stern 2b side.

[0034] A gaseous fuel consuming device 8 is provided in the hull 2. The gaseous fuel consuming device 8 is a device that generates heat energy by burning fuel. As the gaseous fuel consuming device 8, an internal combustion engine used in a main engine for propelling the ship 1, an internal combustion engine used in a power generation device for supplying power to the ship, a boiler that generates steam as a working fluid, and the like can be exemplified.

[0035] 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 at a position more toward the stern 2b than the superstructure 7. The fixed tank 20 can be provided in the hull 2 at a position more toward the bow 2a than the superstructure 7. Also, the fixed tank 20 can be provided inside the hull 2.

[0036] The fixed tank 20 stores fuel to be burned by the gas fuel consuming equipment 8. As the fuel to be burned by the gas fuel consuming equipment 8, the fixed tank 20 of the present embodiment can store liquefied gas such as LNG (Liquefied Natural Gas), LPG (Liquefied Petroleum Gas), ammonia, hydrogen, or the like. The fixed tank 20 of the present embodiment is, for example, a cylindrical shape extending in the horizontal direction, and is provided so as to extend in the fore-and-aft direction FA. Also, the shape of the fixed tank 20 is not limited to a cylindrical shape, and the fixed tank 20 can be, for example, a spherical shape, a square shape, or the like.

[0037] The fixed tank 20 is connected to the gas fuel consuming equipment 8 via the fuel supply piping system 25. The fixed tank 20 can supply fuel to the gas fuel consuming equipment 8 via the fuel supply piping system 25.

[0038] (Structure of tank mounting portion)

[0039] The tank mounting portion 30 detachably mounts a movable tank 40 described later. The tank mounting portion 30 is provided, for example, on the upper deck 5. The tank mounting portion 30 of the present embodiment is provided, for example, between the superstructure 7 and the fixed tank 20. The tank mounting portion 30 is not limited to the position of provision, and can be provided, for example, in the hull 2 at a position more toward the bow 2a than the superstructure 7.

[0040] The tank mounting portion 30 of the present embodiment is provided in plural. As shown in Figure 2 , in the present embodiment, a case where, for example, four sets of tank mounting portions 30A to 30D are provided at intervals in the ship width direction Dw is exemplified. The arrangement or the number of the tank mounting portions 30 can be appropriately changed.

[0041] Figure 3 is a view that shows a tank mounting portion and a movable tank mounted to the tank mounting portion in the embodiment of the present application. Figure 4 is Figure 3 a side view of the tank mounting portion and the movable tank shown in

[0042] As shown in Figure 3 , Figure 4 , each tank mounting portion 30 can place the movable tank 40 loaded from the outside of the hull 2. The tank mounting portion 30 has a tank support surface 30f toward the upper side. In a case where the movable tank 40 is placed, the tank support surface 30f can support the movable tank 40 from the lower side. Also, a protrusion or the like for fixing the movable tank 40 can be provided on the tank support surface 30f.

[0043] AsFigure 4 As shown, when the movable tank 40 is mounted, each tank mounting section 30 can secure the movable tank 40 to the tank mounting section 30, for example, by means of a binding member 100 such as a binding rod. As a binding member 100, the movable tank 40 can be easily loaded and unloaded from the tank mounting section 30 by using a binding rod or the like used for binding containers.

[0044] Figure 5 This is a top view showing the liquefied gas supply pipeline connecting the fixed tank and the movable tank in an embodiment of the present invention.

[0045] like Figure 5 As shown, the vessel 1 is equipped with a liquefied gas supply pipeline 50 connecting movable tanks 40 mounted on each tank mounting section 30 to fixed tanks 20. The liquefied gas supply pipeline 50 can supply liquefied gas in liquid form from the movable tanks 40 mounted on the tank mounting sections 30 to the fixed tanks 20. For example, one end of the liquefied gas supply pipeline 50 is fixedly connected to the fixed tank 20. The other end of the liquefied gas supply pipeline 50 is detachably connected to the movable tanks 40 mounted on the tank mounting sections 30.

[0046] The liquefied gas delivery line 50 is configured to connect movable tanks 40 and fixed tanks 20 respectively mounted on multiple tank mounting sections 30. In this embodiment, the liquefied gas delivery line 50 has multiple branch pipes 51 (51A to 51D) branching off on the tank mounting section 30 side (the other end side). Each branch pipe 51A to 51D is detachably connected to each movable tank 40 mounted on the multiple tank mounting sections 30.

[0047] The vessel 1 also includes a connection switching unit 60. The connection switching unit 60 selectively connects a movable tank 40 mounted on any one of the plurality of tank mounting units 30 to a fixed tank 20. In this embodiment, the connection switching unit 60 includes a plurality of on / off valves 61 (61A to 61D). On / off valve 61A is provided on a branch pipe 51A that can be connected to the movable tank 40 mounted on tank mounting unit 30A. On / off valve 61B is provided on a branch pipe 51B that can be connected to the movable tank 40 mounted on tank mounting unit 30B. On / off valve 61C is provided on a branch pipe 51C that can be connected to the movable tank 40 mounted on tank mounting unit 30C. On / off valve 61D is provided on a branch pipe 51D that can be connected to the movable tank 40 mounted on tank mounting unit 30D. The connection switching unit 60 selectively connects the movable tank 40 and the fixed tank 20 of any one of the multiple tank mounting units 30 by opening any one of the opening and closing valves 61A to 61D and closing the other opening and closing valves 61.

[0048] (Structure of the movable tank)

[0049] The movable tank 40 is loaded from outside the hull 2. That is, the movable tank 40 does not constitute part of the vessel 1.Figure 3 , Figure 4 As shown, the movable tank 40 has a tank body 41 and a container frame 42.

[0050] The tank body 41 is a pressure vessel capable of storing fuel within it. The tank body 41 can store liquefied petroleum gas (LPG) as fuel supplied to the stationary tank 20. More specifically, the tank body 41 is connected to the stationary tank 20 via the aforementioned LPG supply pipeline 50, thereby enabling the storage of fuel (LPG) supplied only to the stationary tank 20 from both the gas fuel consumption device 8 and the stationary tank 20. In this embodiment, the tank body 41 is, for example, a cylindrical shape extending horizontally. Furthermore, the shape of the tank body 41 is not limited to a cylindrical shape; for example, the tank body 41 can be spherical, square, etc.

[0051] The container frame 42 supports the tank body 41, for example, via a support base 44. The container frame 42 illustrated in this embodiment has the same external dimensions as ISO standard containers, namely so-called 20-foot or 40-foot containers. Thus, like 20-foot and 40-foot containers, the mobile tank 40 can be transported by land using vehicles such as trailers or lifted by lifting devices such as cranes (not shown).

[0052] The container frame 42, for example, has a lower frame 42a, multiple supports 42b, and an upper frame 42c. Viewed from the vertical direction Dv, the lower frame 42a is formed with a first direction Da intersecting the vertical direction Dv as its long side and a second direction intersecting both the vertical direction Dv and the first direction Da (and...). Figure 3 The lower frame 42a is a rectangular frame with its shorter side (in the direction perpendicular to the paper) as the shorter side. Multiple supports 42b are provided at at least four corners of the lower frame 42a. Supports 42b can also be provided at other locations besides the four corners of the lower frame 42a. Each support 42b rises from the lower frame 42a upwards in the vertical direction Dv. The upper frame 42c is provided on the multiple supports 42b. Similar to the lower frame 42a, when viewed from the vertical direction Dv, the upper frame 42c is formed as a rectangular frame with the first direction Da as its longer side and the second direction as its shorter side. The upper frame 42c connects the upper ends of the multiple supports 42b to each other. The container frame 42 can be secured to the tank mounting section 30 by binding members 100 such as binding rods. Furthermore, the container frame 42 has a locking part 43 for locking wire ropes W, etc., and can be lifted by a lifting device.

[0053] Furthermore, the structure of the container frame 42 can be modified appropriately. Also, the container frame 42 can be a hollow box shape. The tank body 41 is housed within this container frame 42.

[0054] The fuel supply system 10A of the ship 1 is configured by the ship 1 and the movable tank 40 as described above. The fuel supply system 10A externally of the ship 1 pre-stores liquefied gas as fuel in the tank main body 41 of the movable tank 40. The movable tank 40 storing the liquefied gas is carried on a vehicle such as a trailer, for example, and is carried into a port (dock) where the ship 1 is berthed.

[0055] Then, the movable tank 40 is hoisted by a hoisting device such as a crane provided in the port and is loaded onto the ship 1. The movable tank 40 is carried on the tank carrying portion 30 provided on the upper deck 5. The tank carrying portion 30 of the present embodiment is provided with a plurality of tank carrying portions 30, and thus a plurality of movable tanks 40 are sequentially carried on the plurality of tank carrying portions 30.

[0056] After the respective movable tanks 40 are carried on the tank carrying portions 30, the movable tanks 40 are bound by the binding member 100. Then, the movable tank 40 and the fixed tank 20 are connected via the liquefied gas supply line 50. After the connection work of the liquefied gas supply line 50 is completed, the movable tank 40 and the fixed tank 20 are connected by opening the on-off valve 61 of the branch line 51 connected to the movable tank 40, and the liquefied gas stored in the movable tank 40 is supplied to the fixed tank 20.

[0057] Figure 6 is a view showing a state in which liquefied gas as fuel is supplied from one movable tank to a fixed tank in the fuel supply system in the embodiment of the present application. Figure 7 is a view showing a state in which liquefied gas as fuel is supplied from another movable tank to a fixed tank, which is different from Figure 6 .

[0058] Here, in the connection switching portion 60, for example, as shown in Figure 6 , the movable tank 40 carried on one tank carrying portion 30A is connected to the fixed tank 20 by the branch line 51A provided with the on-off valve 61A by setting the on-off valve 61A to be open and setting the other on-off valves 61B to 61D to be closed. Thus, liquefied gas as fuel is supplied from the movable tank 40 carried on one tank carrying portion 30A to the fixed tank 20.

[0059] Also, as shown in Figure 7 , for example, the movable tank 40 carried on another tank carrying portion 30B, which is different from Figure 6 , is connected to the fixed tank 20 by the branch line 51B provided with the on-off valve 61B by setting the on-off valve 61B to be open and setting the other on-off valves 61A to 61C and 61D to be closed. Thus, liquefied gas as fuel is supplied from the movable tank 40 carried on another tank carrying portion 30B to the fixed tank 20.

[0060] Likewise, by setting the on-off valve 61C to be open and the other on-off valves 61A, 61B, 61D to be closed, the movable tank 40 mounted on the further tank mounting portion 30C is connected to the fixed tank 20 through the branch pipe 51C provided with the on-off valve 61C. Thus, the liquefied gas as fuel is supplied from the movable tank 40 mounted on the further tank mounting portion 30C to the fixed tank 20.

[0061] Likewise, by setting the on-off valve 61C to be open and the other on-off valves 61A, 61B, 61D to be closed, the movable tank 40 mounted on the further tank mounting portion 30C is connected to the fixed tank 20 through the branch pipe 51C provided with the on-off valve 61C. Thus, the liquefied gas as fuel is supplied from the movable tank 40 mounted on the further tank mounting portion 30C to the fixed tank 20.

[0062] Likewise, by setting the on-off valve 61C to be open and the other on-off valves 61A, 61B, 61D to be closed, the movable tank 40 mounted on the further tank mounting portion 30C is connected to the fixed tank 20 through the branch pipe 51C provided with the on-off valve 61C. Thus, the liquefied gas as fuel is supplied from the movable tank 40 mounted on the further tank mounting portion 30C to the fixed tank 20.

[0063] Likewise, by setting the on-off valve 61C to be open and the other on-off valves 61A, 61B, 61D to be closed, the movable tank 40 mounted on the further tank mounting portion 30C is connected to the fixed tank 20 through the branch pipe 51C provided with the on-off valve 61C. Thus, the liquefied gas as fuel is supplied from the movable tank 40 mounted on the further tank mounting portion 30C to the fixed tank 20.

[0064] Likewise, by setting the on-off valve 61C to be open and the other on-off valves 61A, 61B, 61D to be closed, the movable tank 40 mounted on the further tank mounting portion 30C is connected to the fixed tank 20 through the branch pipe 51C provided with the on-off valve 61C. Thus, the liquefied gas as fuel is supplied from the movable tank 40 mounted on the further tank mounting portion 30C to the fixed tank 20.

[0065] (EFFECTS)

[0066] In the ship 1 and the fuel supply system 10A to the ship 1 of the above-described embodiment, the tank mounting portion 30 to which the movable tank 40 is detachably mounted is provided. Therefore, by moving the movable tank 40 in which the liquefied gas as fuel is stored in advance from outside of the ship and mounting the movable tank 40 on the tank mounting portion 30, the liquefied gas stored in the movable tank 40 mounted on the tank mounting portion 30 can be supplied to the fixed tank 20. In order to supply the liquefied gas from the movable tank 40 to the fixed tank 20, the movable tank 40 and the fixed tank 20 need to be connected, but this connection work can be performed on the ship. Also, the supply work of the liquefied gas from the movable tank 40 to the fixed tank 20 can be performed on the ship. Therefore, the connection work of the movable tank 40 and the fixed tank 20 and the supply work of the liquefied gas can be performed even after the ship 1 departs. Thus, the departure of the ship 1 is inhibited in order to perform the connection work of the piping or the supply work of the liquefied gas. As a result, the liquefied gas loading to the ship 1 can be efficiently performed, and the berthing time of the ship 1 can be shortened.

[0067] Also, in the above-described embodiment, since the ship 1 is provided with the liquefied gas supply line 50, as long as the movable tank 40 mounted on the tank mounting portion 30 is connected to the fixed tank 20 through the liquefied gas supply line 50, it is possible to supply the liquefied gas in a liquid state from the movable tank 40 to the fixed tank 20. Thus, it is possible to efficiently perform the connection work of the movable tank 40 and the fixed tank 20.

[0068] Also, in the above-described embodiment, the liquefied gas supply line 50 is provided so as to be connectable to the movable tank 40 and the fixed tank 20 mounted on each of the plurality of tank mounting portions 30. The connection switching portion 60 selectively connects the movable tank 40 mounted on any one of the plurality of tank mounting portions 30 and the fixed tank 20. Thus, in the connection switching portion 60, among the plurality of movable tanks 40 mounted on the plurality of tank mounting portions 30, first, the movable tank 40 mounted on one of the tank mounting portions 30 is connected to the fixed tank 20, and thus it is possible to supply the liquefied gas in a liquid state from the movable tank 40 mounted on one of the tank mounting portions 30 to the fixed tank 20. Then, if the movable tank 40 mounted on the other tank mounting portion 30 among the plurality of movable tanks 40 mounted on the plurality of tank mounting portions 30 is connected to the fixed tank 20 through the connection switching portion 60, it is possible to supply the liquefied gas in a liquid state from the movable tank 40 mounted on the other tank mounting portion 30 to the fixed tank 20. In this way, it is possible to sequentially supply the liquefied gas in a liquid state from the plurality of movable tanks 40 mounted on the plurality of tank mounting portions 30 to the fixed tank 20.

[0069] Also, by mounting the plurality of movable tanks 40 in the plurality of tank mounting portions 30, it is possible to increase the total amount of the liquefied gas as a fuel mounted on the ship 1. Thus, it is possible to cause the plurality of movable tanks 40 to function as so-called auxiliary tanks, and it is possible to realize the miniaturization of the fixed tank 20 in an amount equivalent to the liquefied gas stored in the plurality of movable tanks 40.

[0070] Also, in the above-described embodiment, the container frame 42 of the movable tank 40 is hoisted by the hoisting device, and thus it is possible to load and unload the movable tank 40 to and from the ship 1. Also, by binding the container frame 42 of the movable tank 40 to the tank mounting portion 30, it is possible to mount the movable tank 40 so as to be attachable and detachable with respect to the tank mounting portion 30. Such a container frame 42 can use the same structure as a so-called container, and can be easily realized at low cost.

[0071] <Second Embodiment>

[0072] Next, a second embodiment of the ship and the fuel supply system to the ship according to the present application will be described. In the second embodiment described below, the difference from the first embodiment is in the connection state of the movable tank 40 mounted on the tank mounting portion 30 and the fixed tank 20, and therefore the same parts as those of the first embodiment are denoted by the same reference numerals and will be described with omission of repetitive description.

[0073] Figure 8 is a view showing the connection state of the fixed tank and the movable tank in the second embodiment of the present application.

[0074] As shown in Figure 8 , in the ship 1 and the fuel supply system 10B to the ship 1 of this embodiment, the tank mounting portion 30P mounts the movable tank 40 at a position higher than the fixed tank 20 in the vertical direction Dv. For example, in the case where the tank mounting portion 30P is provided on the upper deck 5 and the fixed tank 20 is provided in the hull 2 lower than the upper deck 5, the tank mounting portion 30P mounts the movable tank 40 at a position higher than the fixed tank 20 in the vertical direction Dv. Also, even in the case where the fixed tank 20 is provided on the upper deck 5, it is sufficient that the tank support surface 30f of the tank mounting portion 30P is provided at a position higher than the fixed tank 20 in the vertical direction Dv.

[0075] The fixed tank 20 and the movable tank 40 mounted on the tank mounting portion 30P are connected through the liquefied gas feed line 50P and the gas return line 52P.

[0076] The liquefied gas feed line 50P is provided to communicate the liquid phase in the fixed tank 20 with the liquid phase in the movable tank 40 mounted on the tank mounting portion 30P. An on-off valve 61P is provided on the liquefied gas feed line 50P.

[0077] The gas return line 52P is provided to communicate the gas phase in the fixed tank 20 with the gas phase in the movable tank 40 mounted on the tank mounting portion 30P. An on-off valve 62P is provided on the gas return line 52P.

[0078] If the on-off valves 61P and 62P are opened, the liquefied gas in the liquid state in the movable tank 40 is fed to the liquid phase of the fixed tank 20 below due to gravity. If the liquid level of the liquid phase in the fixed tank 20 rises by feeding the liquefied gas in the liquid state to the fixed tank 20, the liquefied gas in the gas state in the fixed tank 20 is squeezed out of the fixed tank 20. The liquefied gas in the gas state that is squeezed out is returned to the gas phase in the movable tank 40 above through the gas return line 52P. That is, the gas phase of the fixed tank 20 and the gas phase of the movable tank 40 are equalized.

[0079] (EFFECTS)

[0080] According to the ship 1, the fuel supply system 10B to the ship 1 of the above-described second embodiment, the movable tank 40 is mounted at a position higher than the fixed tank 20 in the vertical direction Dv by the tank mounting portion 30P, whereby it is possible to effectively supply the liquefied gas in a liquid state from the movable tank 40 to the fixed tank 20 by gravity.

[0081] In the ship 1, the fuel supply system 10B to the ship 1 of the above-described second embodiment, as with the above-described first embodiment, it is possible to effectively perform the loading of the liquefied gas to the ship 1 and shorten the berthing time of the ship 1.

[0082] Here, in the case where a plurality of movable tanks 40 are connected to the fixed tank 20, the on-off valve 61P is set to be open only in the liquefied gas feed line 50P connected to the movable tank 40 that supplies the liquefied gas to the fixed tank 20. In the gas return line 52P, the on-off valve 62P can be set to be open only in the gas return line 52P connected to the movable tank 40 that returns the liquefied gas in a gas state in the fixed tank 20. Also, the on-off valve 62P can be set to be open in the gas return line 52P connected to a plurality of movable tanks 40. Thus, the gas phase in the fixed tank 20 is communicated with the gas phase in a plurality of movable tanks 40, and it is also possible to perform the pressure adjustment in a plurality of movable tanks 40.

[0083] <Third Embodiment>

[0084] Next, a third embodiment of the ship, the fuel supply system to the ship, to which the present application relates, will be described. In the third embodiment described below, the difference from the first embodiment and the second embodiment is in the connection state of the movable tank 40 mounted to the tank mounting portion 30 and the fixed tank 20, and therefore the same symbols are attached to the same parts as those of the first and second embodiments, and the repeated description will be omitted.

[0085] Figure 9 is a view showing the connection state of the fixed tank and the movable tank in the third embodiment of the present application.

[0086] As shown in Figure 9 , the ship 1, the fuel supply system 10C to the ship 1 of the third embodiment has a pressurizing line 70Q and a depressurizing line 80Q.

[0087] The pressurization line 70Q supplies gas at a higher pressure than the pressure in the movable tank 40 to the movable tank 40 mounted on the tank mounting portion 30. The pressurization line 70Q of the present embodiment supplies gaseous state liquefied gas supplied from the fixed tank 20 to the gas fuel consuming apparatus 8 to the gas phase of the movable tank 40. The gaseous state liquefied gas supplied from the fixed tank 20 to the gas fuel consuming apparatus 8 is pressurized by a pump (not shown) and vaporized by an evaporator (not shown), and thus becomes a prescribed pressure or more that is higher than the pressure in the movable tank 40. Also, when gas at a higher pressure than the pressure in the movable tank 40 is supplied to the movable tank 40 through the pressurization line 70Q, the pressure in the fixed tank 20 and the pressure in the movable tank 40 can be equalized in advance. In this way, by supplying gaseous state liquefied gas at a higher pressure than the pressure in the movable tank 40 to the gas phase in the movable tank 40 through the pressurization line 70Q, the liquid state liquefied gas in the movable tank 40 is supplied to the fixed tank 20 through the liquefied gas supply line 50.

[0088] The depressurization line 80Q discharges gaseous state liquefied gas of the fixed tank 20 to the outside of the fixed tank 20. The depressurization line 80Q is connected to, for example, the gas fuel consuming apparatus 8, a gas combustion device (not shown) that combusts the remaining gas, or the like. By the depressurization line 80Q, gaseous state liquefied gas of the fixed tank 20 is supplied to the gas fuel consuming apparatus 8, the gas combustion device (not shown), or the like and combusted, and thus the pressure in the fixed tank 20 can be reduced.

[0089] In this way, a pressure difference can be generated between the movable tank 40 and the fixed tank 20.

[0090] Also, in the description of the third embodiment described above, a case in which both pressurization in the movable tank 40 based on the pressurization line 70Q and depressurization in the fixed tank 20 based on the depressurization line 80Q are performed is exemplified, but as long as at least one of them is performed, liquefied gas can be supplied from the movable tank 40 to the fixed tank 20.

[0091] Also, in the third embodiment described above, a case in which the pressurization line 70Q supplies gaseous state liquefied gas of the fixed tank 20 supplied to the gas fuel consuming apparatus 8 to the gas phase of the movable tank 40 is exemplified, but the liquefied gas supplied to the gas phase of the movable tank 40 is not limited to gaseous state liquefied gas of the fixed tank 20 supplied to the gas fuel consuming apparatus 8.

[0092] (EFFECTS)

[0093] According to the ship 1, the fuel supply system 10C of the ship 1 of the third embodiment described above, by supplying gas at a higher pressure than the pressure in the movable tank 40 to the movable tank 40 through the pressurization line 70Q, liquid state liquefied gas can be efficiently supplied from the movable tank 40 to the fixed tank 20.

[0094] Also, in the pressurizing line 70Q of the third embodiment described above, in the case where the gas state liquefied gas in the fixed tank 20 is sent to the movable tank 40, the liquid state liquefied gas can be efficiently supplied from the movable tank 40 to the fixed tank 20. Also, in the case where the gas of a higher pressure than the pressure in the movable tank 40 is utilized using the gas state liquefied gas in the fixed tank 20, there is no need to provide a pump or the like for transferring the liquid state liquefied gas from the movable tank 40 to the fixed tank 20.

[0095] In the ship 1, the fuel supply system 10C to the ship 1 of the third embodiment described above, as well as in the first and second embodiments described above, the liquefied gas loading to the ship 1 can be efficiently performed, and the berthing time of the ship 1 can be shortened.

[0096] <Fourth Embodiment>

[0097] Next, a fourth embodiment of the ship, the fuel supply system to the ship, to which the present application pertains, will be described. In the fourth embodiment described below, the difference from the first to third embodiments is in the connection state of the movable tank 40 and the fixed tank 20 mounted on the tank mounting portion 30, and therefore the same parts as those of the first to third embodiments will be described using the same reference numerals, and the repeated description will be omitted.

[0098] Figure 10 is a view showing the connection state of the fixed tank and the movable tank in the fourth embodiment of the present application.

[0099] As shown in Figure 10 , the ship 1, the fuel supply system 10D to the ship 1 of the fourth embodiment is provided with a pressurizing line 70R, a depressurizing line 80R, and a pressure adjusting line 90R.

[0100] The pressurizing line 70R sends a gas of a higher pressure than the pressure in the movable tank 40 to the movable tank 40 mounted on the tank mounting portion 30. The pressurizing line 70R of the present embodiment is provided so as to connect the fuel supply piping system 25R, which supplies the liquefied gas as a fuel to the gaseous fuel consuming equipment 8, and the gas phase in the movable tank 40.

[0101] A gas vaporizing portion 27 is provided in the fuel supply piping system 25R. The gas vaporizing portion 27 vaporizes the liquefied gas in the fixed tank 20 and supplies it to the gaseous fuel consuming equipment 8. The gas vaporizing portion 27 is provided with a pump 28 and an evaporator 29.

[0102] The pump 28 pressurizes the liquid state liquefied gas supplied from the liquid phase in the fixed tank 20. The evaporator 29 evaporates and vaporizes the pressurized liquid state liquefied gas. Thus, the gas state liquefied gas vaporized by the gas vaporizing portion 27 becomes a pressure higher than the pressure of the gas phase in the movable tank 40.

[0103] An open / close valve 71R is provided on the pressurizing line 70R. If the open / close valve 71R is opened, the gas phase in the movable tank 40 is communicated with the fuel supply piping system 25R.

[0104] The depressurizing line 80R discharges the gaseous state liquefied gas of the fixed tank 20 to the outside of the fixed tank 20. The depressurizing line 80R is connected to the gaseous fuel consuming device 8, for example. By supplying the gaseous state liquefied gas of the fixed tank 20 to the gaseous fuel consuming device 8 through the depressurizing line 80R and causing it to be combusted as liquefied gas, the pressure in the fixed tank 20 can be reduced.

[0105] The pressure adjusting line 90R is provided so as to communicate the pressurizing line 70R with the depressurizing line 80R. One end of the pressure adjusting line 90R is connected to the pressurizing line 70R at a position on the movable tank 40 side than the open / close valve 71R. An open / close valve 91R is provided on the pressure adjusting line 90R.

[0106] Figure 11 is a view showing a state in which the pressure in the movable tank is adjusted by the pressure adjusting line in the configuration shown in Figure 10

[0107] As shown in Figure 11 In the case where the open / close valve 71R of the pressurizing line 70R is set to be open and the pressure is applied to the inside of the movable tank 40, the open / close valve 91R is set to be closed. In the state where the open / close valve 71R is set to be open, the gas phase in the movable tank 40 is communicated with the fuel supply piping system 25R, and therefore at least a part of the gaseous state liquefied gas vaporized by the gas vaporizing portion 27 is sent to the gas phase in the movable tank 40 through the pressurizing line 70R. Thus, the pressure is applied to the inside of the movable tank 40, and therefore the supply of the liquid state liquefied gas from the movable tank 40 to the fixed tank 20 through the liquefied gas feeding line 50R can be efficiently performed.

[0108] Figure 12 is a view showing a state in which the pressure in the movable tank is adjusted by the pressure adjusting line in the configuration shown in Figure 10

[0109] As shown in Figure 12 In the case where the open / close valve 71R is set to be closed and the pressure is not applied to the inside of the movable tank 40, the open / close valve 91R is set to be open as necessary. By opening the open / close valve 91R, the gas phase of the fixed tank 20 is communicated with the gas phase of the movable tank 40 via the pressure adjusting line 90R, and the inside of the fixed tank 20 and the inside of the movable tank 40 are equalized in pressure. Also, in the case where the pressure in the movable tank 40 is higher than the pressure in the depressurizing line 80R, the gaseous state liquefied gas in the movable tank 40 can be supplied to the gaseous fuel consuming device 8 through the pressure adjusting line 90R.​​

[0110] (Action Effects)

[0111] According to the ship 1, the fuel supply system 10D to the ship 1 of the above-described fourth embodiment, the gas at a higher pressure than the pressure in the movable tank 40 is sent into the movable tank 40 through the pressurizing line 70R, whereby the liquefied gas in the liquid state can be efficiently supplied from the movable tank 40 to the fixed tank 20.

[0112] Also, in the above-described fourth embodiment, the liquefied gas in the gaseous state after vaporization of the liquefied gas in the fixed tank 20 is sent into the movable tank 40 through the pressurizing line 70R, whereby the liquefied gas in the liquid state can be efficiently supplied from the movable tank 40 to the fixed tank 20. Also, in order to prepare the gas at a higher pressure than the pressure in the movable tank 40, the fuel supply pump 28 is used, without separately providing a pump or the like for preparing the gas at a high pressure. Also, by the pressure difference between the movable tank 40 and the fixed tank 20, the liquefied gas in the liquid state can be supplied from the movable tank 40 to the fixed tank 20. Therefore, a pump or the like for transferring the liquefied gas in the liquid state from the movable tank 40 to the fixed tank 20 is not required.

[0113] In the ship 1, the fuel supply system 10D to the ship 1 of the above-described fourth embodiment, as well as in the above-described first to third embodiments, the liquefied gas loading to the ship 1 can be efficiently performed, and the berthing time of the ship 1 can be shortened.

[0114] (Modified Example of the Fourth Embodiment)

[0115] Figure 13 is a view showing the connection state between the fixed tank and the movable tank in the modified example of the fourth embodiment of the present application.

[0116] As shown in Figure 13 , the ship 1, the fuel supply system 10E to the ship 1 in the modified example of the fourth embodiment is provided with a pressurizing line 70R, a depressurizing line 80R, and a pressure adjusting line 90S.

[0117] The pressure adjusting line 90S of the present modified example is provided so as to communicate the gaseous phase in the movable tank 40 with the depressurizing line 80R. The pressure adjusting line 90S of the present modified example is provided separately from the pressurizing line 70R. An on-off valve 91S is provided on the pressure adjusting line 90S. By opening the on-off valve 91S, the gaseous phase of the fixed tank 20 and the gaseous phase of the movable tank 40 are communicated via the pressure adjusting line 90S, and the inside of the fixed tank 20 and the inside of the movable tank 40 are equalized in pressure. Also, in the case where the pressure in the movable tank 40 is higher than the pressure in the depressurizing line 80R, the liquefied gas in the gaseous state in the movable tank 40 can be supplied to the gaseous fuel consuming equipment 8 through the pressure adjusting line 90S.

[0118] In this case, the pressure adjustment line 90S is provided independently from the pressurizing line 70R, and thus the pressure of the gas phase in the other movable tank 40 can be adjusted by the pressure adjustment line 90S even in a state where the gas phase in the movable tank 40 is pressurized by the pressurizing line 70R.

[0119] (Other Embodiments)

[0120] The above-described embodiments of the present application have been described in detail with reference to the accompanying drawings, but the specific configuration is not limited to the embodiments, and design changes and the like within a range not departing from the gist of the present application are also included.

[0121] In addition, although the above-described second to fourth embodiments and their modified examples are shown, these configurations can also be appropriately combined.

[0122] Further, the step of supplying the liquefied gas from the movable tank 40 to the fixed tank 20 is not limited to the above-described steps, and can be appropriately changed.

[0123] <Notes>

[0124] The ship 1, the fuel supply systems 10A to 10E described in each of the embodiments are grasped, for example, as follows.

[0125] (1) The ship 1 according to the first aspect includes: a hull 2; a gaseous fuel consuming device 8 provided to the hull 2; a fixed tank 20 fixed to the hull 2 and capable of supplying a liquefied gas to the gaseous fuel consuming device 8; and a tank mounting portion 30, 30P detachably mounting a movable tank 40 loaded from an outside of the hull 2 and capable of storing a liquefied gas supplied only to the fixed tank 20 among the gaseous fuel consuming device 8 and the fixed tank 20.

[0126] As examples of the gaseous fuel consuming device 8, an internal combustion engine or a boiler can be given.

[0127] Thus, by moving the movable tank 40 in which the liquefied gas is stored in advance from outside the ship and mounting it on the tank mounting portion 30, 30P, the liquefied gas stored in the movable tank 40 mounted on the tank mounting portion 30, 30P can be supplied to the fixed tank 20. In order to supply the liquefied gas from the movable tank 40 to the fixed tank 20, the movable tank 40 and the fixed tank 20 need to be connected, but this connection work can be performed on the ship. Also, the supply work of the liquefied gas from the movable tank 40 to the fixed tank 20 can also be performed on the ship. Therefore, the connection work of the movable tank 40 and the fixed tank 20, the supply work of the liquefied gas can be performed even after the ship 1 sets sail. Thus, the setting sail of the ship 1 is inhibited in order to perform the connection work of the piping or the supply work of the liquefied gas. As a result, the loading of the liquefied gas to the ship 1 can be efficiently performed, and the berthing time of the ship 1 can be shortened.

[0128] (2) The ship 1 according to the second aspect is the ship 1 according to the first aspect, the fuel is liquefied gas, and the ship 1 further includes a liquefied gas supply line 50 that supplies the liquefied gas in a liquid state from the movable tank 40 mounted on the tank mounting portion 30, 30P to the fixed tank 20.

[0129] Thus, if the movable tank 40 mounted on the tank mounting portion 30, 30P and the fixed tank 20 are connected by the liquefied gas supply line 50, the liquefied gas in a liquid state can be supplied from the movable tank 40 to the fixed tank 20. Therefore, the connection work of the movable tank 40 and the fixed tank 20 can be efficiently performed.

[0130] (3) The ship 1 according to the third aspect is the ship 1 according to the second aspect, wherein the liquefied gas supply line 50 is configured to be able to connect the movable tank 40 mounted on each of a plurality of the tank mounting portions 30, 30P and the fixed tank 20, and the ship 1 further includes a connection switching portion 60 that selectively connects the movable tank 40 mounted on any one of the plurality of the tank mounting portions 30, 30P and the fixed tank 20.

[0131] Thus, in the connection switching section 60, among the plurality of movable tanks 40 mounted on the plurality of tank mounting sections 30, 30P, first, the movable tank 40 mounted on one tank mounting section 30, 30P is connected to the fixed tank 20, whereby the liquefied gas in a liquid state can be supplied from the movable tank 40 mounted on one tank mounting section 30, 30P to the fixed tank 20. Then, if the movable tank 40 mounted on another tank mounting section 30, 30P among the plurality of movable tanks 40 mounted on the plurality of tank mounting sections 30, 30P is connected to the fixed tank 20 by the connection switching section 60, the liquefied gas in a liquid state can be supplied from the movable tank 40 mounted on the other tank mounting section 30, 30P to the fixed tank 20. In this way, the liquefied gas in a liquid state can be sequentially supplied from the plurality of movable tanks 40 mounted on the plurality of tank mounting sections 30, 30P to the fixed tank 20.

[0132] (4) The ship 1 according to the fourth aspect is the ship 1 according to the second or third aspect, wherein the tank mounting section 30P mounts the movable tank 40 at a position higher than the fixed tank 20 in the vertical direction Dv.

[0133] Thus, the liquefied gas in a liquid state can be effectively supplied from the movable tank 40 to the fixed tank 20 by gravity.

[0134] (5) The ship 1 according to the fifth aspect is the ship 1 according to the second or third aspect, further comprising: a pressurizing line 70Q, 70R that sends a gas at a higher pressure than the pressure in the movable tank 40 to the movable tank 40 mounted on the tank mounting section 30, 30P.

[0135] Thus, the liquefied gas in a liquid state can be effectively supplied from the movable tank 40 to the fixed tank 20.

[0136] (6) The ship 1 according to the sixth aspect is the ship 1 according to the fifth aspect, wherein the pressurizing line 70Q, 70R sends the liquefied gas in a gaseous state in the fixed tank 20 to the movable tank 40 mounted on the tank mounting section 30, 30P.

[0137] Thus, the liquefied gas in a liquid state can be effectively supplied from the movable tank 40 to the fixed tank 20. Also, as the gas at a higher pressure than the pressure in the movable tank 40, the liquefied gas in a gaseous state in the fixed tank 20 is used, whereby it is not necessary to separately provide a pump or the like in order to prepare a high-pressure gas.

[0138] (7) The ship 1 according to the seventh aspect is the ship 1 according to the fifth aspect, further comprising: a gas vaporizing section 27 that vaporizes the liquefied gas in the fixed tank 20 and supplies it to the gaseous fuel consuming equipment 8, the pressurizing line 70Q sending at least a portion of the liquefied gas in a gaseous state vaporized by the gas vaporizing section 27 to the movable tank 40.

[0139] Thus, the liquefied gas in the liquid state can be efficiently supplied from the movable tank 40 to the fixed tank 20. Also, as the gas at a higher pressure than the pressure in the movable tank 40, the liquefied gas in the gaseous state vaporized by the gas vaporizing section 27 is used, so that a pump or the like is not separately provided for preparing the gas at a high pressure.

[0140] (8) The fuel supply system 10A to 10E to the ship 1 according to the eighth aspect includes: any one of the ships 1 according to (1) to (7); and the movable tank 40 that can be mounted to the tank mounting section 30, 30P.

[0141] Thus, even after the ship 1 departs, the connection work of the movable tank 40 and the fixed tank 20 and the supply work of the liquefied gas can be performed. Therefore, the departure of the ship 1 is not hindered for performing the connection work of the piping or the supply work of the liquefied gas. As a result, the liquefied gas loading to the ship 1 can be efficiently performed, and the berthing time of the ship 1 can be shortened.

[0142] (9) The fuel supply system 10A to 10E to the ship 1 according to the ninth aspect is the fuel supply system 10 to the ship 1 according to (8), wherein the movable tank 40 includes: a tank main body 41 that can store the liquefied gas; and a container frame 42 that supports the tank main body 41 and can be bound to the tank mounting section 30, 30P and hoisted by a hoisting device.

[0143] Thus, the container frame 42 of the movable tank 40 is hoisted by the hoisting device, so that the loading and unloading of the movable tank 40 to the ship 1 can be performed. Also, by binding the container frame 42 of the movable tank 40 to the tank mounting section 30, 30P, the movable tank 40 can be mounted to be attachable and detachable with respect to the tank mounting section 30, 30P. Such a container frame 42 can use the same structure as a so-called container, and can be easily realized at low cost.

[0144] Industrial applicability

[0145] The ship and the fuel supply system to the ship according to the present application can efficiently perform the fuel loading to the ship and shorten the berthing time of the ship.

[0146] Explanation of symbols

[0147] 1 - ship, 2 - hull, 2a - bow, 2b - stern, 3A, 3B - side, 4 - bottom, 5 - upper deck, 7 - superstructure, 8 - gaseous fuel consuming equipment, 10A to 10E - fuel supply system, 20 - fixed tank, 25, 25R - fuel supply piping system, 27 - gas vaporization section, 28 - pump, 29 - evaporator, 30, 30A to 30D, 30P - tank mounting section, 30f - tank support surface, 40 - movable tank, 41 - tank main body, 42 - container frame, 42a - lower frame, 42b - support post, 42c - upper frame, 43 - locking section, 44 - support seat, 50, 50P, 50R - liquefied gas feed line, 51, 51A to 51D - branch line, 52P - gas return line, 60 - connection switching section, 61, 61A to 61D, 61P, 62P - on-off valve, 70Q, 70R - pressurizing line, 71R - on-off valve, 80Q, 80R - depressurizing line, 90R, 90S - pressure adjusting line, 91R, 91S - on-off valve, 100 - binding member, W - steel wire rope.

Claims

1. A ship comprising: a hull; a gaseous fuel consuming device provided to the hull; a fixed tank fixed to the hull and capable of supplying fuel to the gaseous fuel consuming device; and a tank mounting portion detachably mounting a movable tank capable of storing fuel supplied only to the fixed tank among the gaseous fuel consuming device and the fixed tank from outside of the hull.

2. The ship according to claim 1, wherein the fuel is liquefied gas, the ship further comprises a liquefied gas supply line that supplies the liquefied gas in a liquid state from the movable tank mounted to the tank mounting portion to the fixed tank.

3. The ship according to claim 2, comprising a plurality of the tank mounting portions, the liquefied gas supply line is provided to be capable of connecting the movable tank mounted to each of the plurality of tank mounting portions and the fixed tank, the ship further comprises a connection switching portion that selectively connects the movable tank mounted to any one of the plurality of tank mounting portions and the fixed tank.

4. The ship according to claim 2 or 3, wherein the tank mounting portion mounts the movable tank at a position higher than the fixed tank in a vertical direction.

5. The ship according to claim 2 or 3, further comprising: a pressurization line that supplies a gas at a higher pressure than a pressure in the movable tank to the movable tank mounted to the tank mounting portion.

6. The ship according to claim 5, wherein the pressurization line supplies the liquefied gas in a gaseous state in the fixed tank to the movable tank mounted to the tank mounting portion.

7. The ship according to claim 5, further comprising: a gas vaporization portion that vaporizes the liquefied gas in the fixed tank and supplies it to the gaseous fuel consuming device, the pressurization line supplies at least a part of the liquefied gas in a gaseous state vaporized by the gas vaporization portion to the movable tank.

8. A fuel supply system to a ship comprising: the ship according to claim 1; and a movable tank capable of being mounted to the tank mounting portion.

9. The fuel supply system to a ship according to claim 8, wherein the movable tank comprises: a tank main body capable of storing the fuel; and a container frame that supports the tank main body and is capable of being bound to the tank mounting portion and capable of being hoisted by a hoisting device. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

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