KR102340141B1 - ship - Google Patents

Abstract

The present invention relates to a ship comprising: a hull; a liquefied gas storage tank provided inside the hull and storing liquefied gas; and a cabin provided on the upper deck in the hull, wherein the hull is provided with a powder room for storing powder for fire extinguishing, and the powder room is provided directly below the cabin in the interior of the hull. The present invention is to provide the ship for loading liquefied gas into a fuel tank that stores the liquefied gas as a propelling fuel or for storing/transporting a small amount of liquefied gas.

Description

ship {ship}

The present invention relates to a ship.

Recently, as environmental regulations are strengthened, the use of liquefied natural gas, which is close to an eco-friendly fuel, among various fuels is increasing.

Liquefied natural gas is generally transported through LNG carriers, and at this time, the liquefied natural gas can be stored in the tank of the LNG carrier in a liquid state by lowering the temperature to -162°C or less under 1 atm. When liquefied natural gas becomes liquid, its volume is reduced to 1/600 compared to the gaseous state, so transport efficiency can be increased.

Unlike diesel, in the case of loading or unloading liquefied natural gas into a vessel that transports or uses such liquefied natural gas as fuel, it must be maintained at a cryogenic temperature. In addition, it is necessary to control the temperature and pressure of the storage tank in which the liquefied natural gas is stored for stable storage of the liquefied natural gas while performing loading and unloading.

Therefore, in recent years, continuous research and development has been made on a bunkering technology for maintaining liquefied natural gas in a liquid state and supplying it to a liquefied natural gas carrier or a propulsion ship and a ship using the same.

The present invention was created to solve the problems of the prior art as described above, and an object of the present invention is to provide a vessel for loading liquefied gas into a fuel tank for storing liquefied gas as a propelling fuel or for storing/transporting a small amount of liquefied gas. is to provide

A ship according to an aspect of the present invention includes a hull; a liquefied gas storage tank provided inside the hull and storing liquefied gas; and a cabin provided on the upper deck in the hull, wherein the hull is provided with a powder room for storing powder for extinguishing fire, and the powder room is provided in the interior of the hull directly below the cabin characterized in that

Specifically, the cabin may be provided on the upper deck at the bow of the hull, which is in front of the liquefied gas storage tank.

Specifically, the powder room may be provided directly below the cabin with the upper deck interposed therebetween in the bow of the hull, which is in front of the liquefied gas storage tank.

Specifically, the powder room may be disposed to be spaced apart from the liquefied gas storage tank in the front, and a cofferdam may be provided between the liquefied gas storage tank and the powder room.

Specifically, the liquefied gas storage tank is made of a membrane type, and the hull has a trunk deck that protrudes from the upper deck on the upper portion of the liquefied gas storage tank, and the powder room is, of the liquefied gas storage tank It may be provided at a position lower than the upper surface.

Specifically, it further includes a manifold for supplying the liquefied gas of the liquefied gas storage tank to the fuel tank of the liquefied gas propulsion ship, and the powder room may be provided with a powder supply line extending toward the manifold.

Specifically, the manifold receives BOG from the fuel tank, and is provided on the upper part of the hull and includes a buffer tank for storing BOG generated in the liquefied gas storage tank or BOG delivered from the fuel tank. may include more.

A ship according to the present invention is provided with a liquefied gas storage tank for bunkering, or a liquefied gas storage tank for storing a small amount of liquefied gas corresponding to cargo or fuel, by innovatively improving the structure or arrangement, etc. Safety and operational efficiency can be improved.

1 is a side view of a ship according to an embodiment of the present invention.
2 is a front view of a ship according to an embodiment of the present invention.
3 is a plan view of a ship according to an embodiment of the present invention.
4 is a plan cross-sectional view of a ship according to an embodiment of the present invention.

The objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description and preferred embodiments taken in conjunction with the accompanying drawings. In the present specification, in adding reference numbers to the components of each drawing, it should be noted that only the same components are given the same number as possible even though they are indicated on different drawings. In addition, in describing the present invention, if it is determined that a detailed description of a related known technology may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a side view of a ship according to an embodiment of the present invention, FIG. 2 is a front view of the ship according to an embodiment of the present invention, and FIG. 3 is a plan view of the ship according to an embodiment of the present invention. 4 is a plan cross-sectional view of a ship according to an embodiment of the present invention.

1 to 4 , a ship 1 according to an embodiment of the present invention includes a hull 10 , a liquefied gas storage tank 20 , and the like. The ship (1) of the present invention is a liquefied gas carrier that stores liquefied gas as cargo, a liquefied gas propulsion ship that stores liquefied gas to propel the liquefied gas as fuel, or a liquefied gas in a fuel tank mounted on a liquefied gas propulsion ship. It may cover all of the bunkering vessel 1 for delivery, or other floating structures (such as offshore plants).

However, below, the embodiment of the bunkering vessel (1) will be limitedly described, and of course, it should be noted that the right of the present invention is not limited to the bunkering vessel (1).

The hull 10 is a part that forms buoyancy so as to float in the sea, and can accommodate the liquefied gas storage tank 20 and the like therein. The hull 10 may be provided to include an upper surface, left and right side surfaces (ship side shell plate), a bottom surface (ship bottom plate), etc. based on the front cross-section, and may be divided into a bow, a central part, a stern, etc. in the longitudinal direction.

In the hull 10, the bow and the central part and the central part and the stern may be distinguished according to common sense widely known in the technical field to which the present invention belongs, but in this embodiment, for example, the central part of the liquefied gas storage tank 20 is accommodated part, and the bow may mean a front part of the liquefied gas storage tank 20, and the stern may mean a rear part of the liquefied gas storage tank 20.

The upper surface of the hull 10 may form an upper deck 11 . However, this embodiment will be described below, but as the liquefied gas storage tank 20 made of a membrane type is accommodated therein, the trunk deck 12 is provided on the upper part of the liquefied gas storage tank 20 higher than the upper deck 11 ) can be provided. The trunk deck 12 will be described in detail in the section describing the central portion of the hull 10 .

That is, in the hull 10, the bow and stern can form an inner space surrounded by the upper deck 11, the side shell plate and the bottom plate, and the central part is surrounded by the trunk deck 12, the side shell plate and the bottom plate. This may form an interior space.

Hereinafter, the hull 10 will be divided into a bow, a stern, and a central part to describe each part.

First, the bow of the hull 10 will be described. The bow of the hull 10 is provided with a cabin 13 , a mooring device 132 , a powder room 133 , and the like.

Cabin 13, may be provided on the upper deck 11 in the hull 10, for example, the cabin 13 is the upper deck 11 at the bow of the hull 10, which is the front of the liquefied gas storage tank 20 ) can be provided. The cabin 13 may have a multi-story building structure so as to have a steering space for the operation of the crew's living space and the hull 10 . At this time, the cabin 13 may be provided with a fatigue portion 131 at the lower portion.

The hull 10 needs to provide a mooring device 132 for mooring on land, harbor, other ships, etc., and the mooring device 132 may be provided on the upper deck 11 or the like. However, in this embodiment, as the bunkering vessel 1, the hull 10 is provided with only two liquefied gas storage tanks 20 in the longitudinal direction in order to improve mobility, etc., and the length of the hull 10 is reduced to a liquefied gas carrier It can be reduced compared to merchant ships.

In this case, as the space of the upper deck 11 of the bow is also reduced, when the cabin 13 is provided on the upper deck 11, securing the space for the arrangement of the mooring device 132 may be a problem. Therefore, in the present embodiment, the lower portion connected to the upper deck 11 in the cabin 13 may be configured as an open type fatigue portion 131 .

The fatigue part 131 may have a shape consisting of a column and a ceiling except for the main wall in a basic structure of a building that is to be formed of a column, a main wall, and a ceiling. In addition, a living space and the like may not be provided in the pipiti part 131 , and the inside of the pirotti part 131 may be provided in a form in communication with the front of the cabin 13 in the upper deck 11 .

A part of the mooring device 132 may be positioned inside the fatigue portion 131 . That is, in order to solve that the space except for the cabin 13 in the upper deck 11 of the bow is narrow in the installation of the mooring device 132, the lower part of the cabin 13 is the mooring device 132. In this case, at least a part of the mooring device 132 may be provided inside the fatigue part 131 to be vertically overlapped with the cabin 13 .

The mooring device 132 may include a winch 132a and mooring lines 133b, 133c, and 133d for mooring the hull 10 by winding from or unwinding from the winch 132a, the winch 132a. At least a portion of the 132a may be provided inside the fatigue portion 131 .

In addition, a plurality of mooring lines (133b, 133c, 133d) may be provided to extend in various directions for stable mooring of the hull 10, for example, the mooring lines (133b, 133c, 133d) are the lateral mooring lines (133b). ), an inclined mooring line 133c, and a longitudinal mooring line 133d.

At this time, the fatigue tee part 131 of the cabin 13 may have an open shape toward the left and right ends of the hull 10 , and the transverse mooring line 133b of the mooring device 132 moves the fatigue tee part 131 to the left and right. It may be provided to penetrate in the direction. In this case, mooring holes through which the mooring lines 133b, 133c, and 133d pass may be formed on the left and right sides of the cabin 13 .

In addition, at least a portion of the winch 132a that is inclinedly arranged may be placed on the fatigue tee 131, and the inclined mooring line 133c extending from the winch 132a and extending toward the left front or right front of the player is also a fatigue tee part. (131) may be disposed on the inside.

However, a winch 132a is also provided at the forefront in the upper deck 11 of the player, and the longitudinal mooring line 133d extending from the winch 132a and the winch 132a is a pilotti part 131 of the cabin 13. It can be arranged so that it does not overlap.

As described above, in this embodiment, when the installation of the mooring device 132 in the bow becomes difficult as the cabin 13 is disposed on the upper deck 11 of the bow, the cabin 13 and the mooring device 132 are vertically overlapped. By being arranged, it is possible to reduce the length of the hull 10 while not having a problem with the mooring function. For reference, the hull 10 of this embodiment may have a front-to-rear length (LBP) within 100m.

A boat ship store (not shown) having a warehouse function may be provided at the bow of the hull 10, and in a position adjacent to the boat ship store, it is linked with the mooring lines 133b, 133c, 133d to moor the hull 10. A chain locker (not shown) in which the chain of the anchor for the anchor is accommodated may be provided.

In addition, a thruster room (not shown) in which a player thruster is accommodated may be provided in the player, but the space inside the player may be freely deformable to implement various functions.

In this embodiment, a powder room 133 may be provided in the lower part of the cabin 13 in the bow. The powder room 133 may be configured to store powder for extinguishing fire, and the powder may be various substances that can be extinguished.

In general, a dry powder room 133 for storing powder is provided on a merchant ship carrying cargo such as liquefied gas with a risk of explosion. It is provided to be adjacent to the line connection part, the manifolds (60, 61, etc.), and is provided, for example, in the rear of the cargo compressor room 16 located in the center in the longitudinal direction. In this case, since the distance from the dry powder room 133 to the cabin 13 (usually provided in the stern in front of the engine casing 15) on a merchant ship having a length of about 300 m is at least 100 m or more, the cabin 13 is protected from fire. The problem is that it doesn't provide enough protection.

However, in this embodiment, the powder room 133 is located closest to the cabin 13 so that the safety of the crew members located in the cabin 13 can be secured as a top priority while the cabin 13 is placed in the bow from the hull 10 . ) can be placed.

Specifically, the powder room 133 may be provided directly below the cabin 13 in the interior of the hull 10 . That is, the powder room 133 is provided directly below the cabin 13 with the upper deck 11 interposed therebetween at the bow of the hull 10 which is the front of the liquefied gas storage tank 20 .

In this case, the powder room 133 may be disposed to be spaced apart from the liquefied gas storage tank 20 in the front, and a cofferdam 23 may be provided between the liquefied gas storage tank 20 and the powder room 133 . . Although the cofferdam 23 will be described again below, it is provided before and after the liquefied gas storage tank 20, respectively, to protect the parts adjacent to the liquefied gas storage tank 20 in the ship.

In addition, the powder room 133 may be provided at a lower position than the upper surface of the liquefied gas storage tank 20 while being disposed below the upper deck 11 in which the cabin 13 is provided. This is because the upper surface of the liquefied gas storage tank 20 is made higher than the upper deck 11 while being formed in a membrane type having an octagonal front cross-section.

Of course, this embodiment also requires a rapid supply of powder for fire extinguishing in the manifolds 60 and 61, so the powder room 133 of this embodiment has a powder supply line extending toward the manifolds 60 and 61 ( not shown) may be provided. Alternatively, a powder box for separately storing powder may be provided at a position adjacent to the manifolds 60 and 61 .

As such, in this embodiment, the cabin 13 is placed in the bow of the hull 10 to space the cabin 13 from the engine casing 15 to maintain the cabin 13 in a relatively safe state, but the powder room 133 It is possible to safely protect the crew from fire by arranging in the lower part of the cabin 13.

An oil storage tank 24 may be provided inside the bow. The oil storage tank 24 may store oil for consumption as fuel of an engine provided in the engine room 14 to be described later.

The engine may use the liquefied gas stored in the liquefied gas storage tank 20 as a main fuel, and may use oil as an auxiliary fuel to back up the liquefied gas. To this end, the oil storage tank 24 disposed at the bow may deliver oil to the engine at the stern using an oil pump (not shown), and the oil pump may be disposed in the oil pump room (not shown). .

The oil storage tank 24 may be spaced apart from the liquefied gas storage tank 20 in front of the liquefied gas storage tank 20, and between the liquefied gas storage tank 20 and the oil storage tank 24, a cofferdam ( 23) can be provided.

Of course, the oil storage tank 24 may be provided between the liquefied gas storage tanks 20, which are disposed in the engine room 14 in the stern or in front and behind, in addition to being disposed at the bow as in FIG. 1 .

Hereinafter, the stern of the hull 10 will be described. The stern of the hull 10 is provided with an engine room 14 , an engine casing 15 , a mooring device 132 , and the like.

A propulsion engine (not shown) for moving the hull 10 is provided in the engine room 14 in the stern of the hull 10, and also to cover the power load in the ship For the power generation engine (not shown), etc. may be provided.

The exhaust of the propulsion engine/power generation engine disposed in the engine room 14 may be discharged to the outside through the engine casing 15 . The engine casing 15 may be provided on the upper deck 11 of the stern in the hull 10 . An upper portion of the engine casing 15 may be provided with a funnel (not shown) for discharging exhaust to the atmosphere.

In addition, a CO2 room 151 and an emergency power generation room 152 may be provided in front of the engine casing 15 . The CO2 room 151 may be provided to extinguish fires in the engine room 14 and adjacent parts, and in the emergency power generation room 152, an emergency generator is provided in case a problem occurs in the operation of the power generation engine, etc. may be provided.

The CO2 room 151 and the emergency power generation room 152 may be provided on the upper deck 11 from the stern, and may be disposed in a portion where the trunk deck 12 and the upper deck 11 are stepped. Of course, the arrangement of the CO 2 room 151 and the like is not limited to those shown in the drawings.

As described above in the bow portion, a mooring device 132 may be provided even at the stern. Specifically, a winch 132a, a lateral mooring line 133b, and a longitudinal mooring line 133d may be provided on the upper deck 11 provided at the rear of the engine casing 15, but see FIG. 3 . When doing so, the mooring device 132 of the stern may be provided to be exposed to the outside on the upper deck 11 .

Of course, when the space of the upper deck 11 at the stern is insufficient, the fatigue portion 131 described above may be applied to the configuration mounted on the upper deck 11 of the stern. However, in the case of the engine casing 15, since it may be difficult to apply the fatigue part 131 for exhaust emission of the engine, when the fatigue part 131 is applied to the stern, a separate structure is applied to the rear of the engine casing 15 This may be the case (or the case where the CO2 room 151 or the emergency power generation room 152 is located at the rear of the engine casing 15).

Hereinafter, the central portion of the hull 10 will be described. In the central part of the hull 10, a liquefied gas storage tank 20, a ballast tank 50, etc. are accommodated therein, and a compressor room 16, a motor room 17, a vent mast 40, a buffer tank ( 30), etc. are provided.

The liquefied gas storage tank 20 stores liquefied gas. The liquefied gas storage tank 20 is provided in the interior of the hull 10, and three or less (eg, two) may be provided in the longitudinal direction in the interior of the hull 10 .

It has been previously described that the vessel 1 of this embodiment is a bunkering vessel 1, and in this case, the liquefied gas storage tank 20 may store liquefied gas to be supplied to the fuel tank of the liquefied gas propulsion vessel.

The liquefied gas storage tank 20 may be formed in a membrane type. That is, the liquefied gas storage tank 20 may be provided in a structure that forms a storage space as the heat insulating wall 21 is installed in a predetermined space inside the hull 10 .

In addition, the membrane-type liquefied gas storage tank 20 may have an octagonal front cross-section, and the liquefied gas stored in the liquefied gas storage tank 20 may be double-enclosed when referring to FIG. 2 .

For example, a trunk 121 is provided above the upper surface of the liquefied gas storage tank 20, and a moving passage 122 (passage way) is provided on the left and right of the trunk 121, which is the left and right upper side of the liquefied gas storage tank 20. can be provided. In addition, a ballast tank 50 is provided on both sides of the liquefied gas storage tank 20 , and a ballast tank 50 and a pipe duct 51 may be provided at the bottom of the liquefied gas storage tank 20 .

The hull 10 for accommodating the liquefied gas storage tank 20 is provided with a trunk deck 12 on the upper portion of the liquefied gas storage tank 20 . The trunk deck 12 may be an upper surface of the trunk 121 and protrudes from the upper deck 11 . In particular, the trunk deck 12 in the hull 10 is provided to extend to both ends of the hull 10 on the left and right.

That is, the trunk deck 12 is formed by the upper surface of the trunk 121 and the upper surface of the moving passage 122, and the upper surface of the trunk 121 and the upper surface of the moving passage 122 form the trunk deck 12 without a step difference. can In the case of a general liquefied gas carrier, the upper deck 11 is provided at both ends of the hull 10 from above the cargo tank, and the trunk deck 12 is provided directly above the cargo tank, and the upper deck 11 and the trunk deck (12) is connected by an inclined plane. That is, the upper surface of the liquefied gas carrier has a stepped structure including a trunk deck 12 protruding upward and an upper deck 11 made low on both left and right sides.

On the other hand, in this embodiment, as the bunkering vessel 1, the width may be smaller than that of a liquefied gas carrier (the left and right width is about 50 m), for example, the left and right width of the hull 10 may be within 25 m (around 22 m). . In this case, if the top structure applied to the liquefied gas carrier is used as it is, the installation/work space is extremely limited due to the step difference.

Therefore, in this embodiment, the trunk deck 12 is extended from the hull 10 to the side shell plate, so that the left and right widths of the trunk deck 12 can be the same as the left and right widths of the hull 10, Therefore, it is possible to sufficiently secure the installation / working space on the upper surface of the hull 10. In particular, the buffer tank 30 may be horizontally arranged by such a trunk deck 12, which will be described in detail below.

The trunk deck 12 of this embodiment may be formed in the central portion in which the liquefied gas storage tank 20 is provided in the hull 10, and the upper deck 11 is provided in the bow and stern. As the upper surface of the liquefied gas storage tank 20 is formed higher than the upper deck 11 , the trunk deck 12 is provided to form a step with the upper deck 11 . At this time, the cabin 13 may be provided in the portion where the trunk deck 12 and the upper deck 11 form a step in the bow, and in the portion where the trunk deck 12 and the upper deck 11 form a step in the stern, CO2 A room 151 or an engine casing 15 may be provided.

The liquefied gas storage tank 20 may be surrounded and protected by the trunk 121, the moving passage 122, the ballast tank 50, the pipe duct 51, etc. on the basis of the front cross-section, and in the front and rear directions, the cofferdam 23 ) can be protected by The cofferdam 23 is between the liquefied gas storage tanks 20, the front of the bow side liquefied gas storage tank 20, the stern with respect to the liquefied gas storage tank 20, which is arranged in two longitudinal directions in the hull 10. It may be provided in the rear of the side liquefied gas storage tank (20).

The cofferdam 23 can form an empty space or a space filled with a non-explosive fluid to isolate and protect the surroundings from the liquefied gas storage tank 20, but the worker enters the empty space inside the cofferdam 23 An access trunk may be provided for

Since the upper end of the cofferdam 23 may be exposed in the portion where the trunk deck 12 and the upper deck 11 are stepped between the bow and the stern, the access trunk can be provided in the cofferdam 23 adjacent to the bow and stern. have. At this time, the operator may enter the bow side cofferdam 23 through the cabin 13. However, if the cabin 13 is provided to be smaller than the left and right width of the hull 10, the cofferdam 23 can be exposed from both sides of the cabin 13, and the access trunk entrance is the upper deck 11 from both sides of the cabin 13. Since it can be provided to be exposed on the upper deck, in this case, the operator can enter the cofferdam 23 through the access trunk from the upper deck (11).

The liquefied gas storage tank 20 has a dome 22 for the movement of liquefied gas or boil-off gas. The dome 22 is provided to protrude upward from the upper surface of the liquefied gas storage tank 20 and may be exposed above the trunk deck 12 for operator access.

For example, the dome 22 may be provided on the rear side of the upper surface of the liquefied gas storage tank 20 . At this time, on the front side of the upper surface of the liquefied gas storage tank 20, a compressor room 16, a motor room 17, a vent mast 40, a buffer tank 30, etc. to be described below may be provided.

The compressor room 16 is provided on the upper part of the hull 10 and accommodates a compressor for compressing the boil-off gas generated in the liquefied gas storage tank 20 . At this time, the compressor is an HD compressor that compresses BOG generated when liquefied gas is loaded into the liquefied gas storage tank 20, or an LD compressor that compresses BOG generated in the liquefied gas storage tank 20 during the operation process, etc. can include

In addition, the compressor receives the boil-off gas generated in the fuel tank when the liquefied gas of the liquefied gas storage tank 20 is loaded into the fuel tank of the liquefied gas propulsion ship, compresses it, and delivers it to the buffer tank 30 to be described later. have.

The compressor room 16 accommodating such a compressor may be provided on the trunk deck 12 above the stern-side liquefied gas storage tank 20, and the front surface is provided to be parallel with the front surface of the liquefied gas storage tank 20 , can be supported by the vertical front structure of the liquefied gas storage tank (20).

The motor room 17 accommodates a motor for supplying driving force to the compressor, and may be integrally provided on one side of the compressor room 16 . However, the compressor room 16 is a space in which there is a risk of leakage of BOG, which is an explosive material, and is divided into a Dangerous Zone, and the motor room 17 is a space in which there is no risk of leakage of BOG, etc., and is a safety zone (Safety Zone). ) can be distinguished.

The motor room 17 may be provided adjacent to the dome 22 compared to the compressor room 16 . That is, since the dome 22 of the liquefied gas storage tank 20 is provided on the rear side from the top surface, the motor room 17 may be provided on the rear side of the compressor room 16, therefore, the front side of the motor room 17 is the compressor. It may be formed integrally with the rear of the room 16 . In this case, the compressor room 16 may be provided adjacent to the buffer tank 30 compared to the motor room 17 .

In addition, the motor room 17 may be provided on the trunk deck 12 above the stern-side liquefied gas storage tank 20 , similarly to the compressor room 16 . At this time, the compressor room 16 and the motor room 17 may be manufactured as one unit and then mounted on the trunk deck 12 . In addition, a cofferdam (not shown) may be provided on the lower surfaces of the compressor room 16 and the motor room 17 .

In addition, between the dome 22 and the motor room 17 in the upper portion of the hull 10, a vent mast 40 may be provided. The vent mast 40 may be disposed on the trunk deck 12 like the compressor room 16 and the like, and may discharge boil-off gas generated in the liquefied gas storage tank 20 to the outside.

When the internal pressure of the liquefied gas storage tank 20 is excessive, the vent mast 40 may discharge the boil-off gas discharged when the safety valve opens to the outside, or the vent on the flow of liquefied gas or boil-off gas If necessary, liquefied gas is delivered and discharged into the atmosphere. Alternatively, when a purging gas (N2, etc.) is delivered for purging to a section in which liquefied gas or the like flows, the vent mast 40 may be used to discharge the purging gas after purging to the atmosphere.

In this embodiment, the vent mast 40 may be allocated to each liquefied gas storage tank 20 . The vent mast 40 provided on the trunk deck 12, which is above the bow side liquefied gas storage tank 20, may be disposed between the dome 22 and the buffer tank 30, and the stern side liquefied gas storage tank ( The vent mast 40 provided on the trunk deck 12 above the 20 may be disposed between the dome 22 and the motor room 17 .

As described above, the compressor room 16 is a hazardous area and the motor room 17 is allocated as a safety area. There is a risk of adverse effects.

Therefore, in the present embodiment, for the motor room 17 disposed adjacent to the vent mast 40, safety can be secured by applying an air lock or using an explosion-proof motor, and the compressor room 16 is a motor room In contrast to (17), it is arranged on the front side, so that the compressor room 16 and the buffer tank 30 face each other, thereby simplifying and shortening the delivery path of the boil-off gas.

The buffer tank 30 is provided on the hull 10 and stores boil-off gas generated in the liquefied gas storage tank 20 . The buffer tank 30 may store only the boil-off gas therein, or store the liquefied gas so that the boil-off gas is condensed by the liquefied gas.

This buffer tank 30 may be made of a stand-alone type, may have a capsule shape as shown in the drawing, and store boil-off gas at a high pressure. Accordingly, the boil-off gas introduced into the buffer tank 30 may be stored in a state in which the volume is greatly reduced.

The buffer tank 30 is provided to be supported by the saddle 31 . The saddle 31 is configured to support the buffer tank 30 while wrapping at least a portion of the lower surface of the buffer tank 30 , and as the buffer tank 30 is provided in the form of a capsule, the saddle 31 is a curved buffer In order to support the lower surface of the tank 30 , a portion facing the lower surface of the buffer tank 30 may be provided in an arc shape.

The saddle 31 is provided to support at least two points on the lower surface of the buffer tank 30, one point may be provided as a fixed type, and the other point may be provided as a movable type. Therefore, even if the buffer tank 30 contracts and expands due to the inflow and outflow of cryogenic boil-off gas, the saddle 31 stably supports the buffer tank 30 .

The buffer tank 30 is provided on the trunk deck 12 above the bow-side liquefied gas storage tank 20 , and the longitudinal direction is arranged parallel to the width direction of the hull 10 . As described above, since the trunk deck 12 of the hull 10 is provided to extend to both ends on the left and right, the present embodiment increases the efficiency in space utilization of the trunk deck 12 by arranging the buffer tank 30 in the left and right directions. can be raised

In this case, the left and right ends of the saddle 31 may be provided above the moving passage 122 . Since the upper surface of the trunk 121 and the upper surface of the moving passage 122 form the trunk deck 12 without a step difference, even if the left and right widths of the saddle 31 are greater than the trunk 121, the saddle 31 moves through the passage 122. The buffer tank 30 may be stably supported on the trunk deck 12 while being disposed on the top.

However, the buffer tank 30 is provided in the left and right direction, but its length is larger than the left and right width of the liquefied gas storage tank 20 but smaller than the left and right width of the hull 10, so that it does not protrude to the left and right of the hull 10 can be

In addition, the buffer tank 30, when the liquefied gas of the liquefied gas storage tank 20 is supplied to the fuel tank of the liquefied gas propulsion ship, the boil-off gas generated in the fuel tank may be returned to the hull 10, the fuel tank It can receive and store boil-off gas delivered from That is, the buffer tank 30 stores BOG generated in the liquefied gas storage tank 20 or BOG returned from an external fuel tank.

Since the buffer tank 30 stores the boil-off gas of the fuel tank in this way, in this embodiment, in addition to the liquefied gas carrier capable of self-processing the boil-off gas, the boil-off gas is processed other than combustion or air emission while consuming liquefied gas as fuel. For liquefied gas propulsion ships that are difficult to obtain, stable liquefied gas loading is possible by handling boil-off gas.

The ballast tank 50 is provided to surround a part of the side and the bottom of the liquefied gas storage tank 20 in the interior of the hull 10 . In particular, the ballast tank 50 of this embodiment is provided in a larger number than the liquefied gas storage tank 20 in the longitudinal direction from the inside of the hull 10 to ensure damage stability. For example, when two liquefied gas storage tanks 20 are provided, three or five ballast tanks 50 may be provided in the longitudinal direction in the interior of the hull 10 .

The ballast tank 50 may be divided by the front and rear partition walls 50a. That is, the ballast tank 50 is positioned at the front and rear, respectively, with one bulkhead 50a interposed therebetween. At this time, the partition wall 50a dividing the ballast tank 50 back and forth is provided to be shifted from the front or rear side of the liquefied gas storage tank 20 .

When two liquefied gas storage tanks 20 are provided in the longitudinal direction in the ship, and the cofferdam 23 is provided between the bow side liquefied gas storage tank 20 and the stern side liquefied gas storage tank 20, a plurality Among the ballast tanks 50, the ballast tank 50 disposed in the center in the longitudinal direction has a central portion overlapping the cofferdam 23 in the width direction, and the front and rear width is larger than that of the cofferdam 23, so that the front or The rear surface may be provided to be displaced from the cofferdam 23 in the width direction.

In addition, when five ballast tanks 50 are provided in the longitudinal direction in the interior of the hull 10 as in FIG. 1 , the center provided to overlap with the cofferdam 23 dividing the liquefied gas storage tank 20 back and forth of the ballast tank 50 may be provided with a relatively large front and rear width compared to other ballast tanks 50 adjacent to the front and rear. That is, in the present embodiment, the plurality of ballast tanks 50 may be provided with non-uniform front and rear widths.

Therefore, in this embodiment, when the hull 10 is deformed by an external force, the front and rear of the liquefied gas storage tank 20 and the front and rear of the ballast tank 50 are provided at different positions in the longitudinal direction. Since it may have a function as a directional reinforcement, the durability of the hull 10 may be improved. In addition, this embodiment reduces the front and rear width of each of the ballast tanks 50, it is possible to reduce the sloshing impact in the ballast tank (50).

This embodiment further includes manifolds 60 and 61 . The manifolds 60 and 61 may supply the liquefied gas of the liquefied gas storage tank 20 to the fuel tank of the liquefied gas propulsion ship, or may receive boil-off gas from the fuel tank and deliver it to the buffer tank 30 .

These manifolds 60 and 61 may be disposed on both left and right sides in the central portion in the longitudinal direction of the hull 10 . That is, the manifolds 60 and 61 are disposed in the vicinity of the cofferdam 23 between the two liquefied gas storage tanks 20 , and the liquefied gas discharged through the dome 22 of each liquefied gas storage tank 20 . Gas can be delivered to an external fuel tank.

As described above, the manifolds 60 and 61 disposed on the left and right sides in the central part of the hull 10 may be referred to as the central manifold 60 and may be configured as a pair. Therefore, the liquefied gas propulsion ship may receive liquefied gas even if it is adjacent to either side of the port or starboard of the hull 10 .

The central manifold 60 may be disposed on both left and right sides of the trunk deck 12 , and at least a part thereof may be disposed between the two liquefied gas storage tanks 20 . In addition, the central manifold 60 includes a liquid phase line 601 for supplying liquefied gas to the fuel tank of the liquefied gas propulsion ship, and a gas phase line 602 spaced apart from the liquid line 601 and receiving boil-off gas from the fuel tank. may include

At this time, since the liquid line 601 is configured for loading liquefied gas into the fuel tank, it is connected to the lower part of the fuel tank. can be connected

A plurality of liquid lines 601 may be provided to ensure stable bunkering, and a plurality of gaseous lines 602 may be spaced apart from the liquid line 601 between the plurality of liquid lines 601 .

Accordingly, if the liquid phase line 601 is L and the gas phase line 602 is V, the central manifold 60 may have an LVL shape. This is to ensure that the connection end provided in the liquefied gas carrier or liquefied gas propulsion vessel corresponds to a shape of LVVL, VLLV, or the like.

Of course, the shape of the central manifold 60 is not limited to the above, and can be changed to LLV, VLL, etc., and a plurality of gaseous lines 602 are also provided, and LVVL, VLLV, etc. are also possible.

In addition, at least one of the liquid phase line 601 and the gas phase line 602 provided in the central manifold 60 is provided for both liquid and gas transmission. In this embodiment, in addition to the function of supplying liquefied gas to the fuel tank of the liquefied gas propulsion ship using the manifolds 60 and 61, it may be provided with a function of implementing a gas trial, etc. for the fuel tank.

For example, in this embodiment, for the fuel tank, Drying to remove moisture, Inerting to remove explosive gas, Gassing-up to remove CO2, Cool to cool the inside -Loading can be done through cool-down, whereas after unloading, warming-up to vaporize the residual liquefied gas, and inerting/removing explosive gas Gas-freeing (Inerting/Gas freeing), aerating to make it possible to enter can be made.

As an example, a description will be given of the contents of the central manifold 60 implementing gasing-up and warming-up through delivery of liquefied gas/evaporated gas. First, in relation to gassing-up, the central manifold 60 delivers gaseous liquefied gas to the fuel tank through the gaseous line 602 , and receives the gas (CO2) inside the fuel tank through the liquidus line 601 for fuel Gasing-up for the tank can be implemented.

At this time, the gaseous liquefied gas may be vaporized by a vaporizer (not shown) provided in the compressor room 16 or the like, and the gas (CO2) remaining in the fuel tank by the gaseous liquefied gas flowing into the upper part of the fuel tank is removed. It can be recovered through the gas phase line 602 from the bottom.

Also, in relation to warming-up, the central manifold 60 receives BOG from the fuel tank through the gaseous phase line 602 and delivers high-temperature BOG to the fuel tank through the liquid phase line 601, so that 1 Car warm-up can be implemented.

In this case, the high-temperature BOG may be heated by a heater (not shown) provided in the compressor room 16 or the like, and the liquefied gas remaining in the fuel tank is injected into the lower part of the fuel tank after the BOG is heated. can be vaporized.

The warm-up may be performed in two stages. After the high-temperature BOG transfer process is completed to some extent, the central manifold 60 receives the liquefied gas from the fuel tank through the liquid line 601 and the gaseous line 602. 2nd warm-up of the fuel tank can be realized by delivering high-temperature liquefied gas to the fuel tank through the

In this case, the high-temperature liquefied gas may be heated by the carburetor described above, and the liquefied gas remaining in the lower portion of the fuel tank is heated and then injected to the upper portion to remove all liquid residues in the fuel tank.

As such, in the central manifold 60, at least one liquid line 601 / gaseous line 602 is provided for a liquid / gas combination, so that the liquefied gas / evaporated gas is freely transferred to the upper and lower portions of the fuel tank. This is possible, and through this, the present embodiment can perform a gas trial for a liquefied gas propulsion ship.

In addition, the manifolds 60 and 61 of this embodiment may include a stern manifold 61 disposed toward the rear at the stern of the hull 10 . The stern manifold 61 enables loading of liquefied gas, etc., even when the liquefied gas propulsion ship is moored adjacent to the stern, in addition to the case where the liquefied gas propulsion ship is moored parallel to the port or starboard of the hull 10. .

The stern manifold 61 may be disposed at the rear of the engine casing 15 in the upper deck 11 of the stern, and may be provided at a position that does not interfere with the mooring device 132 . For example, a longitudinal mooring line 133d and a winch 132a may be provided on both sides of the stern manifold 61 as in FIG. 3, and a transverse mooring line 133b in front of the stern manifold 61. And a winch (132a) may be provided.

The stern manifold 61 includes a liquid line 601 and a gaseous phase line 602 as described in the central manifold 60 above, and a gas trial for a liquefied gas propulsion ship can be performed. However, the description of the liquid line 601 and the gaseous phase line 602 of the stern manifold 61 is replaced with the description of the central manifold 60 .

As described above, the present embodiment is a ship 1 that stores liquefied gas and implements bunkering, and it is possible to innovatively improve structural stability, efficiency of using internal and external space, and convenience of work such as bunkering.

Although the present invention has been described in detail through specific examples, it is intended to describe the present invention in detail, and the present invention is not limited thereto, and by those of ordinary skill in the art within the technical spirit of the present invention It will be clear that the transformation or improvement is possible.

All simple modifications or changes of the present invention fall within the scope of the present invention, and the specific scope of protection of the present invention will be made clear by the appended claims.

1: ship 10: hull
11: Upper deck 12: Trunk deck
121: trunk 122: movement passage
13: Cabin 131: Pirotibu
132: mooring device 132a: winch
133b: transverse mooring line 133c: inclined mooring line
133d: longitudinal mooring line 133: powder room
14: engine compartment 15: engine casing
151: CO2 room 152: emergency power generation room
16: Compressor Room 17: Motor Room
20: liquefied gas storage tank 21: insulating wall
22: dome 23: cofferdam
24: oil storage tank 30: buffer tank
31: saddle 40: bent mast
50: ballast tank 50a: bulkhead
51: pipe duct 60: central manifold
61: stern manifold 601: liquid line
602: weather line

Claims (7)

hull;
a liquefied gas storage tank provided inside the hull and storing liquefied gas;
a cabin provided on the upper deck in the hull;
a manifold for supplying the liquefied gas of the liquefied gas storage tank to the fuel tank of the liquefied gas propulsion ship, or receiving boil-off gas from the fuel tank; and
A heating means for heating the liquefied gas or boil-off gas,
The hull is
A powder room is provided to store powder for extinguishing fire.
The powder room is
It is provided in the interior of the hull directly below the cabin,
The manifold is
and a liquid phase line for delivering liquefied gas to the lower portion of the fuel tank and a gas phase line for recovering boil-off gas from the upper portion of the fuel tank,
The gaseous liquefied gas heated by the heating means is transferred to the upper part of the fuel tank through the gaseous phase line, and the gas in the fuel tank is moved from the lower part of the fuel tank by the gaseous liquefied gas flowing into the upper part of the fuel tank. Implementing gassing-up to be recovered through the liquid line,
Warming for vaporizing the liquefied gas remaining in the fuel tank by receiving the boil-off gas of the fuel tank through the gas phase line, heating it with the heating means, and injecting high-temperature boil-off gas into the lower part of the fuel tank through the liquid phase line - Bunkering vessel, characterized in that implementing the up. According to claim 1, wherein the cabin,
Bunkering vessel, characterized in that provided in the upper deck at the bow of the hull in front of the liquefied gas storage tank. According to claim 1, wherein the powder room,
Bunkering vessel, characterized in that it is provided directly below the cabin with the upper deck interposed therebetween at the bow of the hull, which is in front of the liquefied gas storage tank. The method of claim 1,
The powder room is spaced apart from the liquefied gas storage tank in the front,
A bunkering vessel, characterized in that a cofferdam is provided between the liquefied gas storage tank and the powder room. The method of claim 1,
The liquefied gas storage tank is made of a membrane type,
The hull is provided with a trunk deck that protrudes from the upper deck than the upper deck of the liquefied gas storage tank,
The powder room, Bunkering vessel, characterized in that provided at a lower position than the upper surface of the liquefied gas storage tank. The method of claim 1,
The powder room, bunkering vessel, characterized in that the powder supply line extending toward the manifold is provided. The method of claim 1,
The bunkering vessel, which is provided on the upper part of the hull and further comprises a buffer tank for storing the boil-off gas generated from the liquefied gas storage tank or the boil-off gas transferred from the fuel tank.

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