KR101599308B1 - Floating structure with a fuel gas tank - Google Patents

Abstract

The present invention relates to a floating structure in which a fuel tank for a gaseous fuel is installed below a cabin space and double diaphragms are installed to safely support the cabin space.

According to the present invention, there is provided a floating structure used floating in the sea, comprising: a cabin space, which is a residence space of crew members; A plurality of gas fuel fuel tanks installed below the cabin space to receive gaseous fuel for use as fuel; A reinforcing member installed between the fuel tanks for gaseous fuel and safely supporting the cabin space; The present invention provides a floating structure having a fuel tank for gaseous fuel.

Fuel tanks, cabin spaces, double bulkheads, containerships, stand-alone tanks, liquid fuels, gaseous fuels

Description

FIELD OF THE INVENTION [0001] The present invention relates to a floating structure having a fuel tank for a gas fuel,

The present invention relates to a floating structure having a fuel tank for gaseous fuel, and more particularly, to a floating structure having a fuel tank for a gaseous fuel and a double partition wall for safely supporting a cabin space below the cabin space. .

Generally, various types of ships such as bulk carriers, container ships, passenger ships, etc. employ a fuel supply system using heavy oil (HFO) (or MDO) such as Bunker C oil, which is a liquid fuel, as propellant fuel.

There is a problem that environmental pollution due to various harmful substances contained in exhaust gas is serious when heavy oil or the like used as fuel in such a conventional fuel supply system is burned. Since the demand for the prevention of environmental pollution is being strengthened all over the world, regulations on propulsion devices using heavy oil as fuel oil are also strengthened, and costs for meeting such regulations are gradually increasing.

In addition, when the oil price rises due to the exhaustion of fossil fuels or unstable local conditions, there are various operational problems such as the problem that the fuel cost of the ship using heavy oil as the fuel increases sharply.

As a result, instead of using heavy oil (or MDO) or using only a minimal amount of fuel oil for various ships, clean fuel such as LNG (or LPG, CNG, DME, etc.), which is gaseous fuel in liquefied or gaseous state, (Or LPG, CNG, DME, etc.) are used as fuel and the price of heavy oil (or MDO) is cheap or environment standard , It is necessary to continue research on fuel supply systems that can mainly use heavy oil (or MDO).

In order to solve these conventional problems, the present invention is characterized in that a plurality of fuel tanks for gaseous fuel are installed below the cabin space, and a double partition wall is provided between the fuel tanks for gaseous fuel, And to provide a floating structure having a fuel tank for fuel.

According to an aspect of the present invention, there is provided a floating structure used floating in a sea, comprising: a cabin area, which is a residence space of crew members; A plurality of gas fuel fuel tanks installed below the cabin space to receive gaseous fuel for use as fuel; A reinforcing member installed between the fuel tanks for gaseous fuel and safely supporting the cabin space; The present invention provides a floating structure having a fuel tank for gaseous fuel.

Preferably, the reinforcing member is a double partition wall formed of a pair of barrier ribs.

A fuel tank for liquid fuel for storing liquid fuel for use as a fuel; and a heterogeneous fuel propulsion system for generating propulsion by using the liquid fuel and the gaseous fuel supplied from the liquid fuel fuel tank and the gas fuel fuel tank .

A void space may be formed in the double barrier rib, and the pair of barrier ribs may be connected to each other in a lattice form.

The gas fuel fuel tank is preferably a stand-alone tank.

Preferably, the independent type tank is an IMO type B tank.

Wherein the fuel stored in the fuel tank for the gaseous fuel is a liquefied gas and a recondenser, a pump, a cooler, a vaporizer, and a vaporizer for treating the liquefied gas to be used in the propulsion device or the power generation device, It is preferable that a machine room in which at least one of the gas compressors is installed is located.

Preferably, the propulsion system is a high-pressure gas injection engine or a low-pressure gas injection engine capable of generating power using different kinds of fuel.

The propulsion device is preferably a gas turbine capable of generating power using gaseous fuel.

According to another aspect of the present invention, there is provided a container ship capable of transporting a plurality of containers, comprising: a space formed inside a hull so that a fuel tank for storing gaseous fuel for use as a fuel can be disposed; ; A cabin area located above the space above the upper deck of the hull; A reinforcing member installed to divide the space into left and right sides of the ship; And a fuel tank for gas fuel.

Preferably, the reinforcing member is a double partition wall formed of a pair of barrier ribs.

According to the present invention as described above, a plurality of gaseous fuel tanks are provided below the cabin space, and a double partition wall is provided between the gaseous fuel tanks for gas fuel A floating structure having a fuel tank is provided.

Therefore, according to the floating structure of the present invention, it is possible to increase the space utilization efficiency, to form the fuel tank room, to prevent the shaking of the cabin space through the relatively small amount of structural reinforcement, do.

Hereinafter, a floating structure having a heterogeneous fuel propulsion system according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Figures 1 to 4 show schematic side views of various embodiments of a floating structure with a heterogeneous fuel propulsion system.

1, the floating structure having a heterogeneous fuel propulsion system includes a plurality of fuel tanks 3 and 4 for storing fuel inside the hull 1, And a propulsion device 5 for generating propulsion force by the fuel delivered from the propulsion device 5.

The different fuel propulsion system includes a plurality of the fuel tanks 3 and 4 and the propulsion device 5 described above and a pipe capable of supplying each fuel contained in the fuel tanks 3 and 4 to the propulsion device 5 And the like.

In the present specification, the floating structure is a concept including all kinds of ships such as bulk cargo ships, container ships, passenger ships, etc., and offshore plants such as oil FPSO that are used while being moored at one point in the sea in normal times.

As shown in the drawings, in addition to the fuel tanks 3 and 4, when the floating structure is a bulk cargo ship or a liquid cargo carrier, etc., it may include one or more storage tanks 7 capable of storing cargo. It should be noted that these storage tanks 7 may also contain cargo that can be used as fuel, but in this case it is treated as a cargo, and not a fuel, so it is different from the fuel stored in the fuel tank herein do.

According to the present embodiment, some of the fuel tanks 3 and 4 (that is, the liquid fuel fuel tank 3) are generally equipped with a heavy oil (HFO), diesel oil (MDO), etc. And the gaseous fuel such as LPG, LNG, DME or CNG may be stored in the remaining fuel tank (i.e., the fuel tank 4 for the gaseous fuel).

The expression liquid fuel and gaseous fuel in this specification is determined depending on whether the state when supplied to the propulsion device, that is, the engine, is liquid or gas. That is, fuel such as heavy oil or diesel oil which maintains a liquid state when supplied to a propulsion device is called a liquid fuel, and when the fuel is stored in a fuel tank, it is in a liquid state or a gas state, , LPG, DME, and CNG are called gaseous fuels.

Generally, as the fuel other than heavy oil, it is preferable to use a fuel gas containing a hydrocarbon component such as LNG, LPG or CNG.

LNG, or Liquefied Natural Gas, is a liquefied natural gas extracted from a gas field and mainly composed of methane. When LNG is lowered in temperature or liquefied under pressure, the volume is reduced to about 1/600, which is advantageous in terms of space efficiency. However, it has a boiling point of about minus 162 degrees Celsius, so it is charged in a specially insulated tank or vessel for transportation and storage, Or less.

LPG, or Liquefied Petroleum Gas, is used to collect crude oil from crude oil or to recover heavy hydrocarbons (2 or more carbon atoms) from crude oil or relatively heavy hydrocarbons (6 To 7 kg / cm < 2 >). The volume is reduced to approximately 1/250 during liquefaction, which is convenient for storage and transportation. Its main constituents are propane and butane, and may contain small amounts of ethane, propylene, butylene, and the like.

CNG, or Compressed Natural Gas, is compressed to about 200 atmospheres to use natural gas as fuel.

DME, or dimethyl ether (DME), is a kind of ether. It is less flammable than LPG and is non-toxic and has a high oxygen content.

Each of the fuel tanks 3 and 4 includes an appropriate level of insulation and sealing system depending on the type of fuel to be accommodated. Particularly, a fuel tank for containing liquefied gas such as LNG or LPG may be a membrane-type or a stand-alone tank used in the field of liquefied gas storage tanks.

Although the fuel tank 3 for the liquid fuel and the fuel tank 4 for the gaseous fuel (for example, LNG, LPG, DME, CNG, etc.) are all installed in the hull 1 of the floating structure in FIG. 1 , As shown in Fig. 2, the fuel tank 3 for the liquid fuel is installed inside the hull 1 of the floating structure and the fuel tank 4 for the gaseous fuel is deformed to be installed on the deck of the floating structure . It goes without saying that the fuel tank 4 for the gaseous fuel may be installed inside the hull 1 of the floating structure and the fuel tank 3 for the liquid fuel may be modified to be installed on the deck of the floating structure.

As the propulsion device 5, a low pressure gas injection engine such as DFDE (Dual Fuel Disel Electric) may be utilized, for example, a high pressure gas injection engine such as ME-GI (Gas Injection Engine of Man B & W) It goes without saying that other propulsion devices can be used as long as two or more different kinds of fuel can be used as fuel.

The expression "two or more different kinds of fuels can be used" in this specification means that two or more types of usable fuels can be used at the same time and two or more different kinds of fuels can be used at the same time. It means that fuel can be selectively used as needed.

3, a description will be given of a method for additionally installing another kind of fuel tank 4 for a gaseous fuel such as LNG in a floating structure designed and dried so as to have only one type, for example, a liquid fuel fuel tank 3 Are illustrated.

3, the hull of the floating structure is cut at an arbitrary position and separated into two parts, that is, the fore part 1a and the aft part 1b, and the fore part 1a and the aft part 1b , An additional hull portion 1c in which the fuel tank 4 is embedded is inserted and integrated with a single hull by welding or the like.

3, the fuel tank may be additionally installed on the deck of the floating structure, as shown in FIG. 2, in addition to the method of additionally providing the fuel tank inside the ship.

As shown in FIG. 1, when a plurality of fuel tanks 3 and 4 capable of storing two or more types of fuel from the initial design stage are installed in the hull 1, or when another type of fuel can be stored later These fuel tanks 3 and 4 may be configured to be permanently attached to the hull 1 when the fuel tank 4 with the fuel tank 4 is added to the hull 1, And may be configured to be detached and detached.

As shown in FIG. 4, when the fuel tank 9 is detachable, it is possible to selectively mount a fuel tank capable of storing a fuel of a larger amount in consideration of the amount of fuel used. Factors that determine fuel usage include the type of propulsion, the price of fuel, seasonal and environmental factors, and so on.

For example, a fuel tank 3 for a liquid fuel such as heavy oil and a fuel tank 4 for a gaseous fuel such as LNG are respectively installed in the hull 1 of the floating structure, and the amount of the liquid fuel used is large The detachable fuel tank 9 as the fuel tank for the liquid fuel can be additionally mounted and the detachable fuel tank 9 as the fuel tank for the gaseous fuel can be additionally installed if the use amount of the gaseous fuel is expected to be large.

When the amount of fuel used is small, it is also possible to remove the detachable fuel tank 9 and use the empty space inside the hull formed by the detachable fuel tank 9 as a space for cargo loading.

For example, since the density of the gaseous fuel such as LNG is lower than that of the liquid fuel such as HFO, when only the relatively high density liquid fuel is used, the detachable fuel tank 9 is removed, It is also possible to mount a fuel tank for gas fuel in the detachable fuel tank 9 and use it when the gas fuel is mainly used.

Further, according to the present invention, as shown in Fig. 5, one space, for example, one fuel tank 3 or 4 may be configured to store different types of fuel as needed. For example, LNG or LPG may be selectively stored in the same space as required, and heavy oil or diesel oil may be optionally stored in the same space.

As described above, according to the present invention, different types of fuel tanks can be selectively accommodated in one space as shown in FIG. 4, or different types of fuel can be selectively accommodated in the same space as in FIG. 5 have.

6 to 8, a fuel tank for a liquid fuel and a fuel tank for a gas fuel for storing a liquid fuel and a gaseous fuel to be supplied to the heterogeneous fuel propulsion system, An example in which the present invention is applied to a container line having a plurality of container lines will be described.

6 is a side view schematically showing a container line in which a fuel tank for a liquid fuel and a fuel tank for a gaseous fuel are mounted in the hull, Fig. 7 is a schematic sectional view taken along line AA in Fig. 6, BB is a schematic cross-sectional view taken along the BB line.

The container ship includes the cabin area 102 where the crews reside, the engine room 106 where the propulsion device 105 is installed, the space where the fuel tank 104 is installed, the inside of the hull except for the machine room 108, A plurality of containers are loaded. It is preferable to move the cabin space 102 from the stern to the center of the hull in order to ensure the visibility when the size of the container line becomes large (for example, 14000 TEU), and accordingly, As a space in which the fuel tank 104 is disposed. In this specification, the central portion of the hull refers to the front portion of the hull where the propulsion unit 105 is installed, and does not necessarily mean the longitudinal center portion of the hull.

The present inventors have found that, in order to avoid increasing environmental regulations and to cope with an increase in the price of liquid fuel such as heavy oil or diesel oil, the inventors of the present invention have found out that LNG (or LPG, CNG, DME ) Is proposed to be used together with liquid fuel. To this end, a propulsion system employs a heterogeneous fuel propulsion system, such as a high pressure gas injection engine such as ME-GI or a low pressure gas injection engine such as DFDE, which can use heterogeneous fuel as a fuel.

6 shows an example in which ME-GI is used as the propulsion device 105, two gas fuel fuel tanks 104 are installed in the lower space of the cabin space 102, six fuel- It is exemplified that the tank 103 is provided, but the present invention is not limited thereto.

According to the present invention, at least one of the gas fuel tank 104 and the liquid fuel fuel tank 103 is detachable from the hull and can be replaced with another kind of fuel tank. Further, according to the present invention, the number of the gas fuel fuel tanks 104 and the number of the liquid fuel fuel tanks 103 mounted in the hull can be adjusted according to the amount of fuel used.

As described above, in FIGS. 6 to 8, two gas fuel fuel tanks 104 are mounted in a space below a cabin space 102 in a space where a fuel tank can be installed, and six liquids An example in which the fuel tank 103 for fuel is mounted is shown.

However, if it is expected that the amount of use of the gaseous fuel is further increased, two gas fuel fuel tanks 104 are directly mounted in a space below the cabin space 102 in a space where the fuel tank can be installed, For example, four liquid fuel fuel tanks 103 and two gas fuel fuel tanks may be mounted in a space where six smaller fuel tanks of the four liquid fuel fuel tanks can be installed. However, this is only an example for helping understanding, and the present invention is not limited to the above-described number.

As the gas fuel fuel tank 104, a membrane type tank or a stand-alone type tank may be used, and particularly, an IMO type B tank is preferably used. In other words, it is preferable that the fuel tank 104 for gas fuel is detachable from the inside of the hull, and among the various types of independent tanks, the hull protecting means is provided below the tank (between the tank and the inner bottom of the hull) It is particularly preferable that an IMO type B tank installed as a car barrier is used.

In the case of type A, since the hull itself must be made of expensive metal that can withstand extremely low temperature, the hull construction cost is increased. In case of type C, the cylindrical type pressure vessel must be used, .

Various devices for supplying fuel to the different fuel propulsion system (gas injection engine) as the propulsion device 105 are preferably disposed in the machine room 108 located in the upper space of the fuel tank 104 for the gaseous fuel, for example . As the fuel supply device for supplying such LNG as fuel to the engine, there are a re-condenser, a high-pressure pump, a cooler, a high-pressure vaporizer, and an evaporative gas compressor.

When a liquefied gas in a cryogenic condition is used as a fuel, it is desirable that the distance between the fuel tank 104 for the gaseous fuel and the machine room 108 be as close as possible to the fuel tank . When the distance between the gas fuel fuel tank 104 and the machine room 108 is long, the heat loss increases in terms of heat insulation to the transfer pipe for transferring the LNG, which is not preferable.

8, the machine room 108 is preferably located between the fuel tank 104 for gas fuel and the cabin area 102. As described above, since it is difficult to load cargo such as containers in the lower portion of the cabin space 102, it is preferable to use this space as a space in which the fuel tank is to be located. Further, It is preferable that the machine room 108 is located at the upper part of the cabin area 102 and at the same time the upper part of the fuel tank 104 for the gas fuel.

It is also advantageous in terms of maintenance that the machine room 108 is disposed between the cabin space 102 and the fuel tank 104 for gas fuel. However, the present invention is not limited to the position of the machine room 108.

7 and 8, a bench 119 protruding inward is formed at the left and right bottom corners inside the hull of the container line. The bench 119 is formed for structural dynamical reinforcement of the hull and securing the ballast capacity. The shape of the fuel tanks 103 and 104 needs to be changed due to the bench 119.

It is preferable that inclined portions 103a and 104a inclined at a predetermined angle are formed on the bottoms of the left and right inner walls of the fuel tanks 103 and 104 located at the left and right sides in the hull. It is advantageous to have a shape corresponding to the bench 119 considering only the storage capacities of the fuel tanks 103 and 104. However, in order to facilitate the manufacture of the fuel tanks 103 and 104 and avoid stress concentration, As shown in Fig.

On the other hand, as shown in FIG. 8, it is preferable that a reinforcing member 117 made of a pair of partitions (that is, double partitions) is provided between the two gas fuel fuel tanks 104. Since the reinforcement member 117 is not a single partition but a double partition wall, it is possible to prevent the vibration of the upper structure, that is, the cabin space 102, and to support the load.

It is advantageous in terms of strength that the double partition wall forming the reinforcing member 117 can have a void space therein and the pair of partition walls are connected to each other so as to have a lattice structure. Further, the reinforcing member 117 may be a copper dam.

The length of the fuel tank 103 for liquid fuel and the length of the fuel tank 104 for gas fuel may have a dimension approximately corresponding to a container having a length of 40 ft.

According to the present invention, the liquid fuel fuel tank 103 and the gas fuel fuel tank 104 can be detachably mounted from the hull. As the gaseous fuel, gaseous fuel such as LPG or CNG other than LNG may be used, and as the liquid fuel, heavy oil or diesel oil may be used. The fuel tank for liquid fuel may be additionally installed in a separate place in the hull such as the forward side of the engine room 106, as well as the space shown in Figs.

In the above description, it is described that two different fuel tanks for fuel are installed in the floating structure. However, according to the present invention, three or more different fuel tanks for fuel may be installed.

According to the present invention, the most efficient fuel can be selectively adopted and used for propulsion, although the price and efficiency of each fuel can be changed according to the age and various factors. Further, when the development of an electric propulsion system, a solar system, or a wind power system having high efficiency is completed within the nearest day, the multi-fuel propulsion system can be constructed using this system according to the present invention.

In the above description, it is described that the fuel from the fuel tank is supplied to a propulsion device composed of a gas injection engine such as an ME-GI engine or a DFDE engine. However, this fuel is not limited to the above- Turbine or the like.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention.

1 is a schematic side cross-sectional view of a floating structure having a heterogeneous fuel propulsion system according to an embodiment of the invention,

2 is a schematic side cross-sectional view of a floating structure having a heterogeneous fuel propulsion system according to another embodiment of the present invention;

3 is a view for explaining a method of additionally installing another kind of fuel tank in a floating structure designed and dried so as to have only one kind of fuel tank,

4 is a schematic side cross-sectional view of a floating structure having a heterogeneous fuel propulsion system according to another embodiment of the present invention;

5 is a diagram for explaining the concept of selectively accommodating different kinds of fuel in one same space according to the present invention;

6 is a side view schematically showing a container line in which a fuel tank for a liquid fuel and a fuel tank for a gas fuel are mounted in a hull;

7 is a schematic cross-sectional view taken along line A-A in Fig. 6, and

8 is a schematic cross-sectional view taken along the line B-B in Fig.

Description of the Related Art

1: Hull 1a: Bow

1b: stern section 1c: additional hull section

1d: opening 3: fuel tank for liquid fuel

4: Fuel tank for gaseous fuel 5: Propulsion device

7: Storage tank 9: Detachable fuel tank

101a: upper deck 102: cabin area

103: Fuel tank for liquid fuel 103a, 104a:

104: fuel tank for gaseous fuel 105: propelling device

106: engine room 108: machine room

117: reinforcing member 119: bench

Claims (11)

As a container line capable of transporting a plurality of containers, A cabin area that is the residence of crew members; A plurality of gaseous fuel tanks installed inside the hull below the cabin space to receive gaseous fuel for use as fuel; A reinforcing member installed between the fuel tanks for gaseous fuel and safely supporting the cabin space; / RTI > A plurality of containers are stacked on the inside of the hull and on the upper deck, The fuel tank for gas fuel is a stand-alone tank, Wherein the reinforcing member is a double partition wall formed of a pair of partition walls, a void space is formed in the double partition wall, Inside the bottom corners of the inside of the hull, a bench protruding inwardly for reinforcing the hull is formed, A sloped portion is formed at the lower left of the fuel tank for the gaseous fuel located at the leftmost position in the hull and the lower portion of the right side of the fuel tank for the gaseous fuel located at the rightmost position among the plurality of gaseous fuel tanks, The interference between the gas fuel fuel tanks is prevented, To ensure visibility, the cabin space is provided at the central portion of the hull, which is a bow side of the engine room in which the propulsion system is installed, and the reinforcing member is installed under the cabin space within the hull to support the load of the cabin space Wherein the fuel tank is provided with a fuel tank for gas fuel. delete The method according to claim 1, And the pair of partition walls constituting the double partition wall are connected to each other in a lattice form. delete The method according to claim 1, Wherein said independent type tank is an IMO type B tank. The method according to claim 1, Wherein the fuel stored in the fuel tank for the gaseous fuel is a liquefied gas and a recondenser, a pump, a cooler, a vaporizer, and a vaporizer for treating the liquefied gas to be used in the propulsion device or the power generation device, Wherein the mechanical chamber in which at least one of the gas compressor and the gas compressor is installed is located. The method according to claim 1, A fuel tank for liquid fuel for storing liquid fuel for use as fuel; and a heterogeneous fuel propulsion system for generating propulsion by using the liquid fuel and the gaseous fuel supplied from the liquid fuel fuel tank and the gas fuel fuel tank Further comprising a fuel tank for gas fuel. The method of claim 7, Wherein the propulsion system is a high-pressure gas injection engine or a low-pressure gas injection engine capable of generating power using a different kind of fuel. The method of claim 7, Wherein said propulsion system is a gas turbine capable of generating power using gaseous fuel. delete delete

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