KR20180076692A - Gas Fuelled Container Carrier - Google Patents

Abstract

The present invention relates to a gaseous fuel propulsion container carrier. The gaseous fuel propulsion container carrier according to an embodiment of the present invention comprises: a liquefied gas storage tank provided below a cabin and storing liquefied gas; and a coffer dam disposed between the liquefied gas storage tank and a hull. The coffer dam is provided between an upper wall of the liquefied gas storage tank and an upper deck, and between a side wall of the liquefied gas storage tank and a side deck. Further, the coffer dam is spaced inwardly of a side shell plate, and is omitted between a bottom wall of the liquefied gas storage tank and a bottom plate.

Description

Gas Fueled Container Carrier}

The present invention relates to a gaseous fuel propulsion container carrier.

A ship is a means of transporting large quantities of minerals, crude oil, natural gas, or more than a thousand containers. It is made of steel and buoyant to float on the water surface. ≪ / RTI >

Such a ship generates thrust by driving the engine. At this time, the engine uses gasoline or diesel to move the piston so that the crankshaft is rotated by the reciprocating motion of the piston, so that the shaft connected to the crankshaft is rotated, .

However, when heavy oil such as HFO or MFO is used as the propellant fuel, environmental pollution due to various harmful substances contained in the exhaust gas is serious when the heavy oil is burned, and regulations for environmental pollution are strengthened, The regulations on propulsion devices using fuel oil are also strengthened, and the cost for satisfying these regulations is gradually increasing.

Accordingly, instead of using heavy oil or using only a minimum amount of fuel as a fuel for a ship, it is possible to replace gasoline or diesel with liquefied natural gas, liquefied petroleum gas The same liquefied gas is used and the technology is being developed.

Liquefied natural gas is a liquefied natural gas obtained by refining natural gas collected from a gas field. It is a colorless and transparent liquid with almost no pollutants and high calorific value. It is an excellent fuel. On the other hand, liquefied petroleum gas is a liquid fuel made by compressing gas containing propane (C3H8) and butane (C4H10), which come from oil in oil field, at room temperature. Liquefied petroleum gas, like liquefied natural gas, is colorless and odorless and is widely used as fuel for household, business, industrial, and automotive use.

Such liquefied gas is stored in a liquefied gas storage tank installed on the ground or stored in a liquefied gas storage tank provided in a ship which is a means of transporting the ocean. The liquefied natural gas is liquefied to a volume of 1/600 The liquefaction of liquefied petroleum gas has the advantage of reducing the volume of propane to 1/260 and the content of butane to 1/230, resulting in high storage efficiency.

These liquefied gases are supplied to various customers and used. Recently, LNG carrier that uses LNG as fuel for LNG carriers that transport liquefied natural gas has been developed. Attempts have been made to apply this method to other vessels other than LNG carriers.

In addition, container carriers are also attempting to improve liquefaction efficiency by enhancing fuel efficiency, reducing emissions, and installing liquefied gas-consuming engines.

The present invention provides a gaseous fuel propellant container carrier which is capable of propelling a liquefied gas as fuel and optimizing a structure for using liquefied gas as fuel.

A gas fuel propulsion container carrier according to the present invention comprises: a liquefied gas storage tank provided below a cabin and storing liquefied gas; And a coffer dam provided between the liquefied gas storage tank and the hull, wherein the coffer dam is provided between an upper wall and an upper deck of the liquefied gas storage tank and between a side wall of the liquefied gas storage tank and a side shell plate, And is omitted between the bottom wall of the liquefied gas storage tank and the ship bottom plate.

Specifically, the ballast tank may further include left and right ballast tanks.

Specifically, the coffer dam may be provided between the side wall of the liquefied gas storage tank and the ballast tank.

Specifically, the coffer dam may be provided so that its interior is in communication with a double bottom structure between a lower wall of the liquefied gas storage tank and the bottom plate.

Specifically, the coffer dam may be provided with an opening at the lower end of a portion surrounding the side wall of the liquefied gas storage tank so as to communicate with the double bottom structure.

Specifically, the coffer dam may have an inverted U shape surrounding the liquefied gas storage tank with respect to a normal cross section.

Specifically, it may further include an oil storage tank provided between the liquefied gas storage tank and the ballast tank.

Specifically, the double bottom structure may be provided so as to be isolated from the ballast tank.

The gaseous fuel propulsion container carrier according to the present invention uses an engine using liquefied gas as fuel instead of gasoline or diesel, so that fuel efficiency is increased, exhaust gas emission is reduced, and operational efficiency is improved.

Further, the gas fuel propulsion container carrier according to the present invention can improve the stability and safety by optimizing the structure and the like for supplying the liquefied gas to the engine, thereby improving the satisfaction of the ship owner.

1 is a side view of a gaseous fuel propulsion container carrier according to a first embodiment of the present invention.
2 is a front cross-sectional view of a gaseous fuel propulsion container carrier according to a first embodiment of the present invention.
3 is a top cross-sectional view of a gaseous fuel propulsion container carrier according to a first embodiment of the present invention.
4 is a front cross-sectional view of a gaseous fuel propulsion container carrier according to a first embodiment of the present invention.
5 is a side cross-sectional view of a gaseous fuel propulsion container carrier according to a first embodiment of the present invention.
6 is a front sectional view of a gas fuel propulsion container carrier according to the first embodiment of the present invention.
7 is a perspective view of a bunker station of a gaseous fuel propulsion container carrier according to a first embodiment of the present invention.
8 is a front sectional view of a gas fuel propulsion container carrier according to a second embodiment of the present invention.
9 is a front sectional view of a gas fuel propulsion container carrier according to a third embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The objects, particular advantages and novel features of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG. It should be noted that, in the present specification, the reference numerals are added to the constituent elements of the drawings, and the same constituent elements are assigned the same number as much as possible even if they are displayed on different drawings. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, the liquefied gas may be used to encompass all gaseous fuels generally stored in a liquid state such as LNG or LPG, ethylene, ammonia, and the like.

Also, the liquefied gas can be used to encompass not only the liquid state but also the gas state, the supercritical state, and the supercooled state for convenience. That is, the case where the liquid is not in a liquid state due to factors such as heating, pressurization, natural vaporization, etc., can also be expressed as liquefied gas for convenience.

FIG. 1 is a side view of a gas fuel propulsion container carrier according to a first embodiment of the present invention, FIG. 2 is a front sectional view of a gas fuel propulsion container carrier according to the first embodiment of the present invention, 1 is a plan sectional view of a gas fuel propulsion container carrier according to an embodiment.

4 is a front cross-sectional view of the gaseous fuel propulsion container carrier according to the first embodiment of the present invention, and Fig. 5 is a side sectional view of the gaseous fuel propulsion container carrier according to the first embodiment of the present invention.

6 is a front sectional view of the gas fuel propulsion container carrier according to the first embodiment of the present invention, and FIG. 7 is a perspective view of the bunker station of the gas fuel propulsion container carrier according to the first embodiment of the present invention.

1 to 7, a gas fuel propulsion container carrier 1 according to a first embodiment of the present invention includes a hull 10, a liquefied gas storage tank 20, a cofferdam 30, A ballast tank 50, a fuel supply chamber 60, a bunker station 70, a transformer room 80, and a vent mast 90. [

The hull (10) forms the appearance of the gas fuel propulsion container carrier (1). The hull 10 is surrounded by the upper deck 11, the side shell 12 and the bottom plate 13 and has a bow 14 on the front side and a stern 15 on the rear side in the fore and aft direction.

The pitcher 15 is provided with a propeller (not shown) and a rudder (not shown) to implement navigation and turning. .

The hull 10 has a double bottom structure 13a. That is, between the bottom plate 13 and the space where the liquefied gas is accommodated, so that leakage of the liquefied gas can be achieved only if at least two walls are broken.

Hereinafter, the internal structure of the hull 10 will be described.

The container C can be loaded inside the hull 10. To this end, a plurality of holders (H) are provided in the front and rear direction inside the hull (10). A cell guide (not shown) is provided in the holder H to guide the loading of the container C.

Partially open partition walls (not shown) are provided in the hold H to divide a plurality of bays (not shown) forming the hold H into blocks. That is, the hold (H) may include at least two or more bays in the anteroposterior direction, and each bay is separated by a partition. At this time, the partially open type partition walls may be provided to be spaced apart from each other, and the space between the partition walls may be referred to as the gap portion G. [

The plurality of holders H have a closed partition wall (not shown) in the front-rear direction, and a gap G is formed between the hold H and the hold H. That is, the front bulkhead of any one of the holders H may be spaced apart from the rear bulkhead of the hold H provided in front of the one of the holders H, and the deck D strip Not shown) may be disposed.

A hatch coam M is provided on the upper portion of the holder H. The hatch coamer M may be a rim protruding upwardly around the inlet of the holder H and may be configured to cover the hatch cover V. [

The hold H can be hermetically sealed from the outside by placing the hatch cover V in the hatch coam M and the hatch cover V can simply be lifted rather than being coupled to the hatch coam M.

The step (B) is provided inside the holder (H). The lower left end and the lower right end of the hull 10 are formed in a curved shape when viewed from the front end face so that in order to load the container C as much as possible in the hold H, the hold H has a rectangular or square shape instead of , And a stepped shape must be provided on the left and right of the holder (H).

The width or height of the stepped portion B may be determined according to the width of the container C and the position or shape of the stepped portion B may be varied between the bow 14 and the stern 15 . This is because the lower portion of the front end face of the hull 10 becomes gradually narrower toward the bow 14 and the stern 15 from the central portion. The stepped portion B can be displaced inwardly or further projected inwardly toward the bow 14 or the stern 15 from the central portion of the hull 10.

That is, the stepped portion B varies in position or shape between the fore and aft stones 15 by the linearity of the hull 10. A ballast tank 50 may be provided between the stepped portion B and the hull 10 so that the position and shape of the stepped portion B are varied in the front and rear direction of the hull 10, The position and the shape of the light source may be varied.

An engine room R may be provided at a position adjacent to the stern 15 within the hull 10. A propulsion engine (not shown) is accommodated in the engine room R, and the propulsion engine is mechanically or electrically connected to the propeller to consume the liquefied gas, which is fuel, to realize rotation of the propeller.

A liquefied gas storage tank 20 may be accommodated in the lower portion of the cabin A in the central portion of the hull 10. At this time, the liquefied gas storage tank 20 may be provided directly below the cabin A and surrounded by the cofferdam 30.

Hereinafter, facilities provided on the upper deck 11 of the hull 10 will be described.

A cabin (A) is provided on the upper deck (11) of the hull (10). The cabin A is a residence space of the boarding ship and can be divided into a plurality of layers such as an A deck (D), a B deck, and a C deck as shown in the figure in the vertical direction. A cockpit .

The cabin A may be provided at a central portion of the hull 10 and the cross section of the hull 10 has a maximum size at a portion where the cabin A is provided. The hull 10 has a central section of the maximum size at the center portion between the bow 14 and the stern 15 and the center section can be extended by a predetermined length back and forth.

The cabin A may not be installed directly on the upper deck 11 but may be provided on the upper part of the fuel supply chamber 60 provided on the upper deck 11. [ That is, the cabin A, the fuel supply chamber 60, and the liquefied gas storage tank 20 may be vertically arranged in the central portion of the hull 10, and the fuel supply chamber 60 will be described later.

An engine casing I is provided on the rear side of the cabin A on the upper deck 11 of the hull 10. The engine casing I has a stack for discharging the exhaust generated in the propulsion engine to the outside, and may form a space in which an emergency generator, a fire extinguishing facility, and the like are provided.

The container C can be loaded on the upper deck 11 of the hull 10 except for the cabin A and the engine casing I. [ For loading the container C, the upper deck 11 is provided with a lashing bridge L which is spaced apart from the upper deck 11 by a predetermined distance in the forward and backward directions.

The lashing bridge L is provided on the front and rear sides of the container C and is used to hold the container C stacked in a plurality of layers. The lashing bridge L may be provided at a position spaced apart from the cabin A before and after the cabin A and may be arranged to be supported independently of the cabin A. [

As described later, the cabin A is supported by the upper deck 11 through the fuel supply chamber 60. A cofferdam 30 is provided below the upper deck 11, Is smaller than the height of the fuel supply chamber (60) in order to secure the capacity of the storage tank (20).

In this case, even if the girder member 34 to be described later is provided in the coffer dam 30 to reinforce the supporting strength of the cabin A, the height of the girder member 34 is not sufficient and the structural strength of the cabin A is not sufficient .

Therefore, in this embodiment, a connecting portion 16 for connecting the lashing bridge L, which is independently supported with the cabin A, to the cabin A is provided, so that even if the height of the girder member 34 is not sufficient, So that it can be stably supported on the upper deck 11.

At this time, the connecting portion 16 may be arranged vertically in parallel with the girder member 34. Therefore, the connecting portion 16 and the girder member 34 are connected to each other like a single member passing through the upper deck 11, so that the stability of the cabin A can be enhanced.

The connection portion 16 may be formed with a through-hole 16a in the left-right direction. A plurality of through holes 16a may be provided in the upper and lower portions and a portion where the through holes 16a are provided may be formed in the deck D of the cabin A As shown in FIG.

The lashing bridge L may be provided with a socket S connected to the container C to supply electric power. At this time, the socket S may be connected to the refrigeration container C to supply power, but a socket S connected to the refrigeration container C may be provided behind the container C. In this case, the lashing bridge L (for example, the cabin A or the lashing bridge L provided at the rear of the engine casing I) in which the container C is not mounted forward is provided with a socket S May not be provided.

A stool T may be provided on the left and right sides of the hatch cover V in the upper deck 11. When the hatch coam M and the hatch cover V are provided, the upper surface of the upper deck 11 and the upper surface of the hatch cover V are different in height. The hatch cover V is relatively smaller than the width of the hull 10 It is necessary to provide a configuration capable of eliminating the height difference in order to load the container C at the left and right ends of the hatch cover V. [

Therefore, a plurality of stools T may be provided on the upper deck 11 in the front and rear direction on the hull 10 in parallel with the side outside sheathing 12 or adjacent to the side sheathing 12, The leftmost and rightmost container C can be supported on the inner side by the hatch cover V and on the outer side by the stool T. [

The liquefied gas storage tank 20 stores liquefied gas. Wherein the liquefied gas may be gaseous fuel consumed by the propulsion engine to operate the gaseous fuel propulsion container carrier 1. [

The liquefied gas storage tank 20 stores the liquefied gas in a liquid state. To this end, the liquefied gas storage tank 20 may store various liquefied gases in a cryogenic condition, and in order to prevent the liquefied gas from spontaneously vaporizing and changing into an evaporated gas, the liquefied gas storage tank 20 employs various insulating structures .

The liquefied gas storage tank 20 may be of a membrane type or a stand-alone type, but the shape of the liquefied gas storage tank 20 is not particularly limited. Also, the liquefied gas storage tank 20 stores the liquefied gas at a pressure of 1 to 10 bar, but the storage pressure of the liquefied gas storage tank 20 is also not particularly limited.

A dome 21 is provided at an upper portion of the liquefied gas storage tank 20. The dome 21 is connected to the inside and the outside of the liquefied gas storage tank 20, and the dome 21 can be passed through the gas fuel line 62.

The liquefied gas storage tank 20 may be provided inside the hull 10 at the lower part of the upper deck 11 so that at least a part of the dome 21 of the liquefied gas storage tank 20 passes through the upper deck 11 . The gas fuel line 62 passing through the dome 21 is not provided at the lower part of the upper deck 11 but can extend from the upper part of the upper deck 11. [

The upper deck 11 may be provided with a fuel supply chamber 60 at a position where the liquefied gas storage tank 20 is provided and the cabin A may be provided at an upper portion of the fuel supply chamber 60. That is, the liquefied gas storage tank 20 may be located below the cabin A.

Since the liquefied gas storage tank 20 is configured to receive the hazardous material, the liquefied gas storage tank 20 is provided with a copper pipe 20 for protecting the cabin A from the liquefied gas storage tank 20, The dam 30 may be surrounded.

An inspection platform for inspecting the outer wall of the liquefied gas storage tank 20 may be provided around the liquefied gas storage tank 20. The inspection platform may be a horizontal member 35 to be described later, and a plurality of horizontal members 35 may be arranged vertically.

The liquefied gas storage tank 20 may have a relatively small width in the front-rear direction relative to the lateral width. The front and rear width of the liquefied gas storage tank 20 may correspond to the front and rear width of the cabin A. [ That is, a space between the partition walls provided in parallel with the front and rear of the cabin A may be a space for accommodating the liquefied gas storage tank 20.

When the front and rear widths of the liquefied gas storage tank 20 are larger than the front and rear widths of the cabin A, the hold H before and after the cabin A is invaded by the liquefied gas storage tank 20, Can be reduced. Therefore, the front-back width of the liquefied gas storage tank 20 can be limited to correspond to the front-rear width of the cabin A. [

However, it is necessary to secure a sufficient capacity of the liquefied gas storage tank 20 in order to secure the navigational distance of the gas-fired propulsion container carrier 1. Therefore, in the present embodiment, the volume of the liquefied gas storage tank 20 can be secured by making the lateral width larger than the front-rear width.

In addition, the liquefied gas storage tank 20 can be made larger than the front-rear width so that the liquefied gas storage tank 20 can store as much gas fuel as is necessary for the operation without invading the loading space of the container C .

However, in the case where the liquefied gas storage tank 20 is provided as a stand-alone type, stability in pitching of the hull 10 may be a problem. In this embodiment, the choke 33a is provided on the inner wall 32 of the coffer dam 30 So that the pitch of the liquefied gas storage tank 20 can be maintained.

A coffer dam (30) is provided between the liquefied gas storage tank (20) and the hull (10). The cofferdam 30 is provided between the upper wall of the liquefied gas storage tank 20 and the upper deck 11 so as to abut the lower surface of the upper deck 11. The cofferdam 30 is also provided between the side wall of the liquefied gas storage tank 20 and the side deck 12, Respectively.

At this time, the liquefied gas storage tank 20 has a height from the double bottom structure 13a of the ship 10 to the lower end of the copper dam 30. The height of the liquefied gas storage tank 20 refers to the height of the liquefied gas storage tank 20 or the height of the independent liquefied gas storage tank 20, It means height combined with height for installation.

That is, no space or configuration other than the wall structure of the liquefied gas storage tank 20, the choke 33a, and the support are provided between the double bottom structure 13a and the lower end of the copper dam 30 have.

Therefore, the liquefied gas storage tank 20 can have a maximum height while ensuring safety in the inside of the hull 10, so that the present embodiment can store liquefied gas The volume of the tank 20 can be enlarged. In order to secure the capacity of the liquefied gas storage tank 20, the cofferdam 30 may have a height that is relatively smaller than the height of the fuel supply chamber 60.

The cofferdam 30 may be omitted between the lower wall of the liquefied gas storage tank 20 and the bottom plate 13 when the liquefied gas storage tank 20 is provided in the form of a membrane, May have an inverted U shape surrounding the liquefied gas storage tank (20). That is, only the double bottom structure 13a is provided between the bottom wall of the liquefied gas storage tank 20 and the bottom plate 13, and the coffer dam 30 may not be provided.

At this time, the cofferdam 30 may be provided so that its interior is in communication with the double bottom structure 13a between the lower wall of the liquefied gas storage tank 20 and the bottom plate 13. For this purpose, the liquefied gas storage tank 20, An opening 31 for communicating with the double bottom structure 13a may be provided at a lower end of a portion surrounding the side wall of the housing.

Therefore, in the liquefied gas storage tank 20, the upper wall and the side wall may be surrounded by the copper dam 30, and the lower wall may be surrounded by the double bottom structure 13a. Here, the opening 31 may be provided so as to constantly communicate the double bottom structure 13a with the copper dam 30.

In addition, the cofferdam 30 may be provided to be spaced inwardly with respect to the side outside sheathing 12, and oil storage tanks 40 and ballast tanks 50 are provided outside the coffer dam 30 in the left- .

The ballast tank 50 is provided so as to abut the sideboard 12 on the right and left sides of the hull 10 and the cofferdam 30 is provided between the side wall of the liquefied gas storage tank 20 and the ballast tank 50, The oil storage tank 40 may be provided between the liquefied gas storage tank 20 and the ballast tank 50.

The ballast tank 50, the oil storage tank 40, the cofferdam 30, and the liquefied gas storage tank 20 can be arranged in the direction from the side outer shell 12 toward the inside. In this case, The gas storage tank 20 can be prevented from leaking by the ballast tank 50, the oil storage tank 40, and the coffer dam 30 in spite of the breakage of the side shell plating 12.

The above-mentioned double bottom structure 13a may be provided so as to be isolated from the ballast tank 50. Since the double bottom structure 13a is a space communicating with the cofferdam 30, the leakage of the liquefied gas can be primarily blocked. Therefore, the ballast tank 50 can form an isolated space with the double bottom structure 13a and the copper dam 30 so that the ballast tank 50 can block the leakage of the liquefied gas.

Between the upper wall of the liquefied gas storage tank 20 and the hull 10 in the coffer dam 30, a girder member 34 may be provided in the longitudinal direction. The girder member (34) is provided on the lower surface of the upper deck (11) and can have an inverted T-shaped cross section.

The upper end of the girder member 34 may be connected to the lower surface of the upper deck 11 and the lower end of the girder member 34 may be connected to the upper wall of the liquefied gas storage tank 20 in the coffer dam 30 while being accommodated in the coffer dam 30. A plurality of the girder members 34 may be arranged in the left-right direction.

The girder member (34) may be provided with a connecting portion (16) to be described later. Even if the girder member 34 is provided in the coffer dam 30, the cofferdam 30 can be installed in the cabin A provided above the upper deck 11, since the cofferdam 30 can have a height relatively smaller than the height of the fuel supply room 60. [ May not be sufficient. The connecting portion 16 is attached to the side of the girder member 34 in order to reinforce the supporting strength of the cabin A so that the lashing bridge L can be used as a structure for supporting the cabin A. As described above.

When the liquefied gas storage tank 20 is provided as a stand-alone type, the inner wall 32 opposed to the liquefied gas storage tank 20 in the coffer dam 30 is provided with a choke (33a) may be provided. Since the liquefied gas storage tank 20 has a relatively wide front-to-rear width and a relatively small width relative to the left and right width, it may be vulnerable to pitching of the hull 10 and the like. Therefore, in this embodiment, the choke 33a is placed on the front inner wall 32 and the rear inner wall 32 of the liquefied gas storage tank 20 of the inner wall 32 of the coffer dam 30, The pitch of the gas storage tank 20 can be kept.

The choke 33a may be provided on the left and right inner walls 32 of the liquefied gas storage tank 20 among the inner walls 32 of the cofferdam 30, Or to hold the roll.

The choke 33a may have a height greater than the clearance between the inner wall 32 of the coffer dam 30 and the outer wall of the liquefied gas storage tank 20. [ That is, the choke 33a may have a height larger than the front-rear width of the copper dam 30. In this case, for the installation of the choke 33a, the coffer dam 30 is provided with the depression 33.

The depression 33 is depressed outwardly of the liquefied gas storage tank 20 to receive at least a portion of the choke 33a in the inner wall 32 of the cofferdam 30. [ The depth at which the depressed portion 33 is recessed may be limited by the front-rear width of the copper dam 30 at the height of the choke 33a.

As described above, the horizontal member 35 is provided around the liquefied gas storage tank 20, and the horizontal member 35 is provided in the longitudinal direction of the coffer dam 30, and the inner wall of the cofferdam 30 32 to the liquefied gas storage tank 20 and used as an inspection platform of the liquefied gas storage tank 20. [

The horizontal member 35 can be provided on the inner wall 32 surrounding the right and left liquefied gas storage tanks 20 in the coffer dam 30 and one end is fixed to the inner wall 32 of the cofferdam 30 And the other end is spaced apart from the outer wall of the liquefied gas storage tank 20.

Since the inner wall 32 of the copper dam 30 is provided vertically, it is necessary to reinforce the structure by joining horizontally arranged members. The present embodiment can stably maintain the structure of the inner wall 32 of the copper dam 30 by placing the horizontal member 35 on the inner wall 32 of the copper dam 30.

The horizontal member 35 in the present embodiment is formed in an outer wall of the oil reservoir tank 40 facing the inside of the oil reservoir tank 40 in the coffer dam 30, And may be provided only on the inner wall 32 opposed to the liquefied gas storage tank 20.

Therefore, owing to the above arrangement of the horizontal member 35, the oil storage tank 40 can be in the form without the protruding member inside. In this case, the present embodiment can prevent the oil from remaining in the oil storage tank 40.

In other words, in the present embodiment, the vertical horizontal member 35 is provided to reinforce the structure of the inner wall 32 of the coffer dam 30, and the horizontal member 35 is projected to the inside of the oil storage tank 40 The protruding member can be omitted in the oil storage tank 40 and the horizontal member 35 is projected toward the liquefied gas storage tank 20 so that the horizontal member 35 is used as an inspection platform There is no need for a separate inspection platform.

At least a portion of the gaseous fuel line 62 may be located in the cofferdam 30. The gas fuel line 62 extends from the dome 21 penetrating the upper deck 11 and passes through the upper deck 11 through the fuel supply portion in the fuel supply chamber 60 and is drawn into the cofferdam 30, Lt; / RTI > At this time, the horizontal member 35 has a structure for preventing interference with the gas fuel line 62, for example, a hole (not shown) for penetrating the gas fuel line 62 may be formed.

The gaseous fuel line 62 may then be connected to the line duct 62a in the cofferdam 30 and may extend along the line duct 62a to deliver the liquefied gas between the fueling chamber 60 and the propulsion engine.

The oil storage tank 40 stores oil. The oil storage tank 40 may be provided on the left and right sides of the liquefied gas storage tank 20, specifically, on the right and left sides of the cofferdam 30.

The oil stored in the oil storage tank 40 may be a substance that maintains a liquid state at room temperature, and the oil may be used as fuel for the propulsion engine. That is, when the gaseous fuel is exhausted or the use of the gaseous fuel is difficult, oil of the oil storage tank 40 may be supplied to the propulsion engine.

The lower end of the oil storage tank 40 may have a stepped shape. The stepped shape of the lower end of the oil storage tank 40 may be at least a part of the stepped portion B. Of course, the lower end of the oil storage tank 40 may be provided as a flat surface or an inclined surface. However, since the oil storage tank 40 is provided on the right and left sides of the coffer dam 30 and can be omitted in the portion where the hold H is provided, If the lower end of the oil storage tank 40 is not in the form of a step, the lower end of the oil storage tank 40 and the stepped portion B of the holder H are shifted without being juxtaposed, and the structural stability may be deteriorated. Therefore, the lower end of the oil storage tank 40 can be formed by a part of the step portion B. [

The oil storage tank 40 may be provided on the left and right of the coffer dam 30 and may be provided in the gap G as well. The gap G where the oil storage tank 40 is provided is not a gap G for dividing the bay in the back and forth in the holding H but is a gap G for dividing the holding H in the back and forth May be a gap portion (G). This is because the gap G for partitioning the bays back and forth is made by an open type partition wall while the gap portion G for dividing the hold H back and forth is made up of a closed type partition wall. Of course, since the front and rear bulkheads of the bay are not limited to the open type, the position of the oil storage tank 40 is not limited to the above.

The ballast tank 50 stores ballast water for keeping the hull 10 in a stable state. The capacity of the ballast water stored in the ballast tank 50 may vary depending on the number of the holders H and the number of the containers C loaded on the upper deck 11.

For example, when the container C is not (almost) loaded on the hold H and the upper deck 11 (light draft condition), the ballast tank 50 may be sufficiently filled with ballast water. Propeller racing and the like can be prevented.

On the other hand, the ballast water tank 50 may not be filled with (almost) ballast water when the container C is loaded / loaded fully (fully loaded state) in the hold H and upper deck 11. Through this, the hull 10 can stably float and navigate.

The ballast tank 50 may be provided so as to abut the side shell 12 of the hull 10. That is, when the side outside sheathing 12 is broken, the inside of the ballast tank 50 can communicate with the outside. However, since the ballast water contained in the ballast tank 50 is seawater, marine pollution can be blocked even if the side shell 12 is broken.

The ballast tanks 50 may be provided on the right and left sides of the oil storage tank 40 at the central portion of the hull 10 where the liquefied gas storage tank 20 and the cofferdam 30 are provided. Therefore, the ballast tank 50 can protect the oil storage tank 40 from breakage of the side shell plating 12. Also, since the liquefied gas storage tank 20 is provided inside the oil storage tank 40 and the coffer dam 30, the ballast tank 50 can also protect the liquefied gas storage tank 20.

The ballast tank 50 may be provided to abut the side shell plate 12 of the hull 10 and may be provided in the double bottom structure 13a. The ballast tank 50 provided in the double bottom structure 13a and the ballast tank 50 brought into contact with the side outer shell 12 can be communicated with each other or independently.

The stepped portion B may be provided on the upper side of the ballast tank 50 provided in the double bottom structure 13a as described above except that the ballast tank 50 is provided at the center of the double bottomed structure 13a And the line duct 62a may be provided.

The fuel supply chamber 60 receives a fuel supply (not shown) for delivering the liquefied gas to the propulsion engine. Here, the fuel supply portion may include at least one of a pump for pressurizing the liquefied gas, a compressor for compressing the evaporated gas vaporized by the liquefied gas, and a heat exchanger for heating the liquefied gas / vaporized gas.

That is, the fuel supply unit includes all the arrangements for delivering the liquefied gas to the propulsion engine in accordance with the temperature and pressure required by the propulsion engine, and also includes an evaporative gas treatment arrangement for maintaining the internal pressure of the liquefied gas storage tank 20 It can be meaningful.

The fuel supply chamber 60 may be provided on the upper deck 11 of the hull 10 and the cabin A may be provided on the upper portion of the fuel supply chamber 60. [ That is, the fuel supply chamber 60 is provided at the lower portion of the cabin A, but the fuel supply chamber 60 is a region for handling the liquefied gas at risk of explosion. Therefore, in order to protect the cabin A, 60 and the cabin A may be provided.

Since the fuel supply room 60 has the fuel supply portion for handling the liquefied gas, there is a risk of leakage of the liquefied gas. Further, since the fuel supply chamber 60 is a space for handling the liquefied gas, ventilation may be required.

Accordingly, the fuel supply chamber 60 is provided with a vent portion 64 for discharging the internal fluid such as the leakage gas or the internal air to the outside to promptly remove the leakage gas or properly implement the ventilation of the fuel supply chamber 60 .

The vent portion 64 discharges the fluid in the fuel supply chamber 60 back and forth or in the lateral direction. Since the upper portion of the fuel supply chamber 60 is the cabin A, the vent portion 64 may not discharge the fluid upward.

Explosion may be required within a certain radius based on the vent portion 64 through which the explosive fluid is discharged. As described above, the lashing bridge L is provided before and after the cabin A. The lashing bridge L is provided with a socket S for connecting the freezing container C, It is a real difficulty to prepare.

In consideration of the fact that the socket S is not provided on the lashing bridge L provided behind the cabin A because the socket S is connected to the rear of the container C, (64) can implement a vent toward the rear of the cabin (A), that is, toward the rear of the fuel supply room (60).

Therefore, since the vent portion 64 discharges the fluid inside the fuel supply chamber 60 toward the lashing bridge L where the socket S is not provided, the present embodiment can prevent the explosion-proof socket S from being installed no need.

The upper end of the dome 21 may be located inside the fuel supply chamber 60. The dome 21 of the liquefied gas storage tank 20 is provided so as to pass through the upper deck 11. The upper end of the dome 21 can be surrounded by the fuel supply chamber 60 provided on the upper deck 11 .

The gas fuel line 62 accommodated in the dome 21 is connected to a fuel supply portion provided in the fuel supply chamber 60 and is discharged from the inside of the liquefied gas storage tank 20 through the gas fuel line 62 The liquefied gas / evaporated gas can be suitably treated by the fuel supply and delivered to the propulsion engine.

The gas fuel line 62 is connected from the fuel supply chamber 60 to the propulsion engine where the temperature of the liquefied gas causes thermal deformation of the gas fuel line 62 or the movement of the hull 10 causes the gas fuel A deformation of the line 62 may occur.

At this time, in order to prepare for deformation of the gas fuel line 62, the gas fuel line 62 may not be provided in a straight line from the fuel supply room 60 to the propulsion engine, and may be bent or bent The gas fuel line 62 may be provided with an expansion loop 62b. As the gas fuel line 62 is provided with a bent or bent portion, even if deformation occurs in the gas fuel line 62, The liquefied gas can be stably transferred to the propulsion engine.

However, it is necessary to secure a space in order to form a portion bent or bent in the gas fuel line 62. At this time, in this embodiment, instead of forming an additional space, the space already provided in the hull 10 can be utilized to secure a space in which the gas fuel line 62 can be bent.

First, the gas fuel line 62 may be provided adjacent to the step B. The position or shape of the stepped portion B may not be constant due to the linearity of the hull 10 whose width becomes narrower toward the bow 14 or the stern 15 from the central portion as described above. At this time, the gas fuel line 62 may be bent or bent so as to correspond to the variation of the stepped portion B.

The gas fuel line 62 may be surrounded by the line duct 62a and the line duct 62a may be provided along the step B and extend toward the propulsion engine at a position adjacent to the fuel supply chamber 60, . In this case, the gas fuel line 62 may be bent or bent so as to correspond to the positional change of the line duct 62a.

That is, as shown in FIG. 4, the position of the line duct 62a at the center portion is indicated by a dotted line. When the linearity of the hull 10 becomes narrower toward the bow 14 or the stern 15, ) Is indicated by a solid line. It can be seen that the position of the line duct 62a changes inward as it goes from the center portion to the bow 14 or the stern 15 when the two positions of the line duct 62a are compared.

3, the line duct 62a may be bent inwardly while extending in the front-rear direction of the ship 10. At this time, the bent portion of the line duct 62a may be bent Or bent portions may be provided.

The line duct 62a may be displaced outwardly or inwardly at least one time while extending toward the propulsion engine at a position adjacent to the fuel supply room 60. For example, the line duct 62a may be located in the fuel supply chamber 60, The position may vary outwardly and then laterally inwardly while extending toward the propulsion engine.

The gas fuel line 62 may be bent or bent outwardly along with the positional change of the line duct 62a, and then bent or bent inward. Of course, the positional variation of the line duct 62a and the arrangement of the bent or bent portion in the gas fuel line 62 are not particularly limited to the above.

And / or the gas fuel line 62 may have an expansion loop 62b that is bent or bent at the position of the gap G. [ The gap portion G is a space provided between the hold H and the hold H or between the bay and the bay and the gas fuel line 62 is moved from the fuel supply chamber 60 through the gap G The engine can be connected to. At this time, an expansion loop 62b is provided in a part of the gas fuel line 62 located in the gap G to prevent the thermal expansion of the gas fuel line 62, Securing can be omitted.

The line duct 62a accommodating the gas fuel line 62 may be provided in contact with the stepped portion B as described above or may be provided in the double bottomed structure 13a. Both the former and latter line ducts 62a pass through the gap G and the gap G allows the peripheral space of the line duct 62a to be used for the gas fuel line 62. [

The line duct 62a extends at the position of the gap G and the gas fuel line 62 can have the expansion loop 62b at the extended portion of the line duct 62a. And / or the line duct 62a is opened at the position of the gap G and the gas fuel line 62 is connected to the expansion loop 62a which is projected outside the line duct 62a at the open portion of the line duct 62a 62b.

Accordingly, in this embodiment, since the line duct 62a accommodating the gas fuel line 62 is provided in contact with the step portion B whose position / shape changes linearly, The gas fuel line 62 can be bent or bent at a point where the line duct 62a is displaced to prepare for deformation of the gas fuel line 62. [

And / or the present embodiment can extend or open the line duct 62a at a position where the gap G is located, and thus the expansion loop 62b can be provided in the gas fuel line 62 even if the line duct 62a is provided in a linear form ) So that the delivery of the liquefied gas can be stably maintained despite the deformation of the gas fuel line 62.

In the fuel supply chamber 60, a void portion 63 may be provided. The deck D may be provided in the deck D between the fuel supply chamber 60 and the cabin A. The deck D mentioned in the description of the void portion 63 will be referred to as A deck D it means.

The void portion 63 is depressed toward the cabin A on the deck D opposed to the upper deck 11. The void portion 63 may be provided in the upper right room of the dome 21 and the dome 21 may be projected to the void portion 63. The void portion 63 may include at least the upper right portion of the dome 21 and may have a larger area than the dome 21 or the same area.

Since the void portion 63 is provided, the height of the position where the dome 21 is provided in the fuel supply chamber 60 may be relatively higher than the height of other portions. The difference between the height of the position where the dome 21 is provided and the height of the other portion corresponds to the height of the void portion 63.

The height of the void portion 63 may be the same as or different from the height between the A deck D and the B deck. If the height of the void 63 is equal to the height between the A deck D and the B deck, the A deck D may be provided as omitted in the portion where the dome 21 is provided.

Placing the void portion 63 on the upper side of the fuel supply chamber 60 according to the present embodiment can be achieved by withdrawing equipment (not shown) contained in the liquefied gas storage tank 20 through the dome 21 and / To allow the equipment to be drawn into the liquefied gas storage tank (20). Inside the liquefied gas storage tank 20 equipment such as a pump may be accommodated and such equipment may be withdrawn from the liquefied gas storage tank 20 or into the liquefied gas storage tank 20 for maintenance, .

Since the upper end of the dome 21 passes through the upper deck 11 and can be provided somewhat higher than the upper deck 11, the voids 63 are not provided The height between the dome 21 and the deck D is made smaller than the height of the fuel supply chamber 60.

In this case, depending on the size of the equipment (in particular, depending on the height of the equipment), it may be impossible for the equipment to be drawn or drawn through the dome 21 to be blocked by the deck D, Therefore, in the present embodiment, the void 63 is provided, and the height of the dome 21 is sufficiently secured, so that the drawing or drawing of the equipment can be efficiently realized.

At this time, the void 63 may be provided with a crane 63a. The crane 63a may be provided above the deck D and may draw out the equipment provided in the liquefied gas storage tank 20 through the dome 21 and / The equipment can be pulled inside. The type of the crane 63a is not particularly limited, and the crane 63a may be, for example, an overhead crane 63a. It goes without saying that any structure may be provided in the void portion 63 instead of the crane 63a or with the crane 63a if lifting of the equipment is possible.

The bunker station 70 receives the liquefied gas from the outside and transfers it to the liquefied gas storage tank 20. The bunker station 70 may be provided outside the hull 10, not inside the hull 10, for efficient connection with the outside.

The bunker station 70 can be placed on the upper deck 11. The bunker station 70 may also be located in the central portion of the hull 10 where the liquefied gas storage tank 20 is provided to reduce the distance to the liquefied gas storage tank 20.

For example, the bunker station 70 may be provided on the left and right sides of the fuel supply room 60. The lateral width of the fuel supply chamber 60 may be smaller than the lateral width of the hull 10 and the side walls of the fuel supply chamber 60 may be spaced inwardly from the side shell 12 of the hull 10 . Therefore, the left-right width of the bunker station 70 can be allowed to be equal to the distance between the side shell 12 and the side wall of the fuel supply chamber 60. At this time, the inner wall of the bunker station 70 may be in contact with the side wall of the fuel supply room 60, and the outer wall of the bunker station 70 may be vertically aligned with the side outer shell 12.

However, the bunker station 70 may have a shape in which at least a part of the outer wall is perforated so as to have an opening 31 in the outward direction. This is for the purpose of enabling the bunker station 70 to be quickly connected to an external liquefied gas source and also for the release of leaking gas leaking in the bunker station 70.

The upper surface of the bunker station 70 may be inclined upward toward the outside. If leaking gas is generated in the bunker station 70, the leaking gas may be in a gaseous state at room temperature and may flow upward.

At this time, through the inclined upper surface of the bunker station 70, the leaking gas can flow along the outer side, and can be discharged while escaping to the open outer side. To this end, the outside of the opening 31 in the bunker station 70 may be in the form of an opening 31 of a certain height downward from the top surface.

The bunker station 70 may have a flat cross-section as the outside has an open form. The inner wall of the bunker station 70 can be adjacent to the fuel supply room 60 and the bunker station 70 can be installed in the upper part of the fuel supply room 60, But it is located at a position relatively close to the cabin A. In this case,

In order to protect the cabin A from the dangerous elements of the bunker station 70, the bunker station 70 is arranged so that all surfaces facing the cabin A are closed . ≪ / RTI > At this time, the surface of the bunker station 70 facing the cabin A may be an upper surface, an inner surface, and the outer surface of the bunker station 70 is opposite to the cabin A. Therefore,

On the front and rear surfaces of the bunker station 70, a louver 71 for discharging gas may be provided. The louver 71 is provided for discharging leak gas generated in the bunker station 70 to the outside.

However, if the leakage gas is discharged through the front and rear surfaces of the bunker station 70, the leakage gas may be transmitted to the cabin A. Therefore, the louver 71 discharges the leakage gas in a direction away from the cabin A . ≪ / RTI >

The front and rear surfaces of the bunker station 70 may be provided with recesses 72 for preventing interference with debris (not shown). A debit may be provided before or after the bunker station 70 or outside the land or the like where the liquefied gas source is provided and the debit needs to be accessed within the configuration of the bunker station 70.

However, when the bunker station 70 has a flat cross-section, it may become difficult to approach the debit. Therefore, in this embodiment, the recess 72 is formed on the front and rear surfaces of the bunker station 70, So that the end is easily positioned inside the bunker station 70.

Here, the recessed portion 72 may have a shape recessed inwardly from the outer side on the front and rear surfaces, and may be provided on the outer side of the louver 71. The position of the louver 71 and the recess 72 is as described above because the recess 72 prevents the interference of the debit when the recess 72 is recessed by a predetermined width inward from the outer side, It may be provided at a position spaced inward from the outer side in the plane. Of course, the louvers 71 may be provided on the inside and / or the upper and lower sides of the recess 72.

The transformer room 80 is accommodated in the hull 10 on the right and left sides of the liquefied gas storage tank 20. The transformer room 80 accommodates a transformer (not shown), wherein the transformer may be configured to convert voltages of various electric powers used in the gaseous fuel propulsion container carrier 1.

The transformer room 80 can be provided in contact with the lower surface of the upper deck 11 at the outside of the coffer dam 30. That is, the transformer room 80 is provided just under the upper deck 11, and may be provided between the upper wall of the oil storage tank 40 and the upper deck 11.

The outer wall of the transformer room 80 may be parallel to the outer wall of the oil storage tank 40 and may be disposed at a position spaced inward from the side shell 12 of the hull 10. A passway (not shown) may be provided between the outer wall of the transformer room 80 and the side windshield 12 so that the boat can move.

In this embodiment, the height of the liquefied gas storage tank 20 is maximized so that the upper wall of the liquefied gas storage tank 20 is located just below the upper deck 11. In this way, the liquefied gas necessary for the operation can be stored. The transformer room 80 may not be installed inside the hull 10 and may be installed in the engine casing I if most of the space inside the hull 10 is used for the volume of the liquefied gas storage tank 20. [

However, the engine casing I is also difficult to secure space, and if the transformer room 80 is installed in the engine casing I, the amount of cables may increase. Therefore, in this embodiment, the transformer room 80 can be provided inside the hull 10, instead of the engine casing I, and the position of the transformer room 80 can be controlled by a copper dam (30) and the oil storage tank (40).

Since the capacity of the oil storage tank 40 can be reduced by sufficiently securing the capacity of the liquefied gas storage tank 20 in the present embodiment, the oil storage tank 40 can be moved from the step B to the upper deck The transformer room 80 can be disposed in an empty space between the oil storage tank 40 and the upper deck 11 while maintaining a height lower than the height of the upper deck 11.

The present embodiment can provide a transformer room 80 inside the center portion of the hull 10 even if the height of the liquefied gas storage tank 20 is arranged at a height adjacent to the upper deck 11, It is possible to secure the space of the engine casing (I) and other spaces.

The vent mast 90 discharges the gas. The gas discharged by the vent mast 90 may be a liquefied gas, a leaking gas that leaks in various configurations or spaces, air that is vented in various spaces, and the like.

The vent mast 90 can discharge leak gas and the like in the fuel supply chamber 60 to the outside and can be located behind the engine casing I. [ At this time, the vent mast 90 may be provided to be supported on the upper deck 11 independently of the engine casing I, or be structurally integrated into the engine casing I through a separate reinforcing member.

In this embodiment, however, the fuel supply chamber 60 may be provided at the center portion of the hull 10, and the engine casing I is disposed at the stern 15 of the hull 10. Therefore, when the vent in the fuel supply chamber 60 is realized by the vent mast 90 provided at the rear of the engine casing I, a pipe for venting is provided between the vent mast 90 and the fuel supply chamber 60 There is a problem that needs to be extended long.

However, in this embodiment, in addition to the vent mast 90 provided in the engine casing I, the vent mast 90 provided in the bow 14 is additionally provided in the bow 14, The vent mast 90 provided in the rear of the engine casing I is responsible for the vent of the room 60 and can take charge of the vent of the engine room R. [

Therefore, the present embodiment can reduce the distance between the fuel supply chamber 60 and the vent mast 90, so that the length of the pipe for the vent can be shortened, and the pipe for the vent can pass through the holder H, (C) problems such as reduction in the amount of stacking can be prevented.

Further reduction of the length of the pipe for venting can reduce the friction loss acting on the pipe in addition to reducing the volume, thereby reducing the size of the pipe while minimizing the application of the expansion loop 62b to the pipe .

As described above, in this embodiment, since the liquefied gas is delivered from the liquefied gas storage tank 20 to the propulsion engine to operate the gas-fueled propulsion container carrier 1, the optimum design is implemented, And so on.

8 is a front sectional view of a gas fuel propulsion container carrier according to a second embodiment of the present invention.

8, the gas fuel propulsion container carrier 1 according to the second embodiment of the present invention can reduce the height of the liquefied gas storage tank 20 without reducing the volume of the liquefied gas storage tank 20 . The fuel supply chamber 60 of the present embodiment may be provided at a position where the fuel supply chamber 60 is provided in the previous embodiment, 11) and the liquefied gas storage tank 20, respectively.

In this case, the present embodiment can prevent the liquefied gas storage tank 20 and the oil storage tank 40 from being adjacent to each other. Although the liquefied gas storage tank 20 and the oil storage tank 40 are isolated from each other by the coffer dam 30 in the preceding embodiment, the present embodiment is not limited to the case where the liquefied gas storage tank 20 and the oil storage tank 40 are The fuel can be separated from each other by the fuel supply chamber 60 and the coffer dam 30 provided between the fuel supply and the fuel supply.

9 is a front sectional view of a gas fuel propulsion container carrier according to a third embodiment of the present invention.

Referring to FIG. 9, the gas fuel propulsion container carrier 1 according to the third embodiment of the present invention allows the fuel supply chamber 60 to be provided on the left and right sides of the liquefied gas storage tank 20. In this case, the volume of the liquefied gas storage tank 20 in the present embodiment can be maintained as it is in the first embodiment.

In this embodiment, the oil storage tank 40 may be provided on the upper deck 11 as described in the second embodiment. That is, the present embodiment may be such that the positions of the oil storage tank 40 and the fuel supply chamber 60 are different from those of the first embodiment.

However, in the case of the first embodiment, there is no protruding member in the space where the oil storage tank 40 is provided. However, in this embodiment, instead of the oil storage tank 40 in the space in which the oil storage tank 40 is provided in the first embodiment, Since the fuel supply chamber 60 is provided, protruding members may be provided inside.

Particularly, in this embodiment, since the fuel supply chamber 60 has a small width in the lateral direction and a high height, the fuel supply chamber 60 can be provided with a plurality of horizontal members (not shown) have.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the same is by way of illustration and example only and is not to be construed as limiting the present invention. It is obvious that the modification and the modification are possible.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

1: Gas Fuel Propelled Container Carrier
C: Container A: cabin
D: Deck I: Engine casing
R: Engine room H: Hold
V: Hatch cover M: Hatch coamings
T: stool G: gap portion
B: Step L: Lashing Bridge
S: Socket 10: Hull
11: Upper deck 12: Side shell
13: bottom plate 13a: double bottom structure
14: Player 15: Stern
16: connecting portion 16a:
20: liquefied gas storage tank 21: dome
30: copper dam 31: opening
32: inner wall 33: depression
33a: choke 34: girder member
35: Horizontal member 40: Oil storage tank
50: ballast tank 60: fuel supply room
61: Insulation bulkhead 62: Gaseous fuel line
62a: Line duct 62b: Expansion loop
63: void portion 63a: crane
64: Vent section 70: Bunker station
71: louver 72: lumbar
80: Transformer room 90: Bent mast

Claims (8)

A liquefied gas storage tank provided below the cabin and storing the liquefied gas; And
And a coffer dam provided between the liquefied gas storage tank and the hull,
Wherein the cofferd dam comprises:
Gas storage tanks, between the upper wall of the liquefied gas storage tank and the upper deck, between the side walls of the liquefied gas storage tank and the side shell plates, spaced inwardly from the side shell plates, and omitted between the lower walls of the liquefied gas storage tanks and the bottom plates Features a gaseous fuel propelled container carrier. The method according to claim 1,
Further comprising a ballast tank provided on the left and right sides of the hull. The apparatus as claimed in claim 2,
Wherein the liquefied gas storage tank is provided between the sidewall of the liquefied gas storage tank and the ballast tank. The apparatus according to claim 1,
Wherein the interior of the gas-fired vessel is provided to communicate with a double bottom structure between a lower wall of the liquefied gas storage tank and the bottom plate. 5. The apparatus according to claim 4,
And an opening for communicating with the double bottom structure is provided at a lower end of a portion surrounding the side wall of the liquefied gas storage tank. The apparatus according to claim 1,
Wherein said liquefied gas storage tank has an inverted U-shape surrounding said liquefied gas storage tank with respect to a normal cross-section. 3. The method of claim 2,
Further comprising an oil storage tank provided between the liquefied gas storage tank and the ballast tank. The double bottom structure according to claim 4,
Wherein the gasoline-fueled container-carrying vessel is arranged to be isolated from the ballast tank.

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