KR20140058477A - Floating structure with a propulsion system using heterogeneous fuel - Google Patents

Abstract

Disclosed is a floating structure with a propulsion system using heterogeneous fuel to float on the sea. According to an embodiment of the present invention, the floating structure comprises a propulsion device installed inside a hull of the floating structure; a fuel tank for storing fuel used for the propulsion device; and a pipe for supplying fuel accepted in the fuel tank to the propulsion device. The fuel tank is installed on an upper deck of the floating structure.

Description

[0001] FLOATING STRUCTURE WITH A PROPULSION SYSTEM USING HETEROGENEOUS FUEL [0002]

The present invention relates to a floating structure having a heterogeneous fuel propulsion system.

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 such conventional problems, the present invention provides a machine room in which an apparatus for supplying fuel to a heterogeneous fuel propulsion system is disposed on a fuel tank for storing a liquefied gas to be used as a fuel, And to provide a floating structure having a heterogeneous fuel propulsion system.

According to an aspect of the present invention, there is provided a floating structure for use in floating in a sea having a heterogeneous fuel propulsion system, comprising: a cabin positioned at a central portion of the floating structure on an upper deck of the floating structure; A zone; A fuel tank installed inside the hull of the floating structure under the cabin space; A fuel supply pipe extending along a lower portion or a side of a hull of the floating structure to supply the fuel stored in the fuel tank to the heterogeneous fuel propulsion system; The present invention provides a floating structure having a heterogeneous fuel propulsion system.

And a lower pipe for fuel supply extending along the lower portion of the hull for fuel supply extends through a space between the fuel tank and the bottom of the hull.

The fuel supply side pipe extending along the side of the hull for fuel supply preferably extends through the passages formed above the ballast tanks on the left and right sides of the hull.

Preferably, the floating structure further comprises a machine room located between the cabin space and the fuel tank and treating the fuel stored in the fuel tank prior to feeding the heterogeneous fuel propulsion system.

The floating structure may further include a transfer pipe connecting the lower portion of the fuel tank and the machine room, and the fuel supply pipe connects the machine room and the heterogeneous fuel propulsion system.

It is preferable that the transfer piping has a transfer pump for supplying the fuel discharged from the lower portion of the fuel tank to the machine room located above the fuel tank.

It is preferable that one or more of the fuel tanks are provided, and the fuel supply pipes are provided in the same number as the number of the fuel tanks installed.

Preferably, a plurality of the fuel tanks are provided, and the fuel supply pipe is formed such that a plurality of auxiliary pipes extending from the respective fuel tanks are combined into one main pipe.

Wherein the fuel stored in the fuel tank is a liquefied gas and at least one of a re-condenser, a pump, a cooler, a vaporizer, and an evaporative gas compressor for treating the liquefied gas so that the liquefied gas can be used in the heterogeneous fuel propulsion system .

The heterogeneous fuel propulsion system may be a low pressure gas injection engine or a high pressure gas injection engine. The heterogeneous fuel propulsion system may also be a gas turbine.

Preferably, the floating structure further includes a liquid fuel fuel tank for storing at least one of heavy oil and diesel oil for use as fuel.

The fuel tank is preferably detachable from the hull.

The fuel tank is preferably a stand-alone tank capable of storing liquefied gas.

It is preferable that the floating structure further includes a space capable of loading the cargo on at least one of the inside of the hull and the upper deck.

It is preferable that the floating structure is a ship capable of self-navigating by the heterogeneous fuel propulsion system, and the ship is preferably a container ship.

According to still another aspect of the present invention, there is provided a floating structure used in a suspended state at sea, comprising: a fuel tank for gas fuel installed inside a hull of the floating structure; An energy generation device that receives energy stored in the fuel tank for the gaseous fuel and generates energy; A fuel supply pipe extending along a lower side or a side surface of the floating structure of the floating structure so as to supply fuel from the fuel tank for the gaseous fuel located on the bow side to the energy generating device; The present invention also provides a floating structure, comprising:

It is preferable that a cabin space and a cargo space are arranged above the upper deck of the floating structure.

According to still another aspect of the present invention, there is provided a ship having a high-pressure gas injection engine and being floated at sea, the ship being located on the upper deck of the ship on the bow side of the high-pressure gas injection engine; A fuel tank installed inside the hull of the ship below the cabin space; A fuel supply pipe extending along a lower portion or a side of a hull of the ship to supply fuel stored in the fuel tank to the heterogeneous fuel propulsion system; The ship being provided with a ship.

According to the present invention as described above, the floating structure having the heterogeneous fuel propulsion system provided on the top of the fuel tank for storing the liquefied gas to be used as the fuel for the machine room in which the devices for supplying the fuel to the heterogeneous fuel propulsion system are disposed, / RTI >

Accordingly, the floating structure of the present invention enables efficient fuel supply to the heterogeneous fuel propulsion system.

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 view schematically showing a piping system in a case where a fuel tank for a gaseous fuel is mounted in a space provided for loading a fuel tank inside the hull,
7 is a view schematically showing a piping system in a case where a liquid fuel fuel tank is mounted in a space provided for loading a fuel tank in a hull,
8 and 9 are schematic views each showing an example of a piping system in a case where a plurality of fuel tanks are provided inside the hull,
10 and 11 are a side view and a cross-sectional view of a floating structure for explaining a state of supplying fuel through a fuel supply lower pipe, and
12 and 13 are a side view and a cross-sectional view of a floating structure for explaining a state of supplying fuel through a fuel supply side pipe.

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, the boiling point is about minus 162 degrees Celsius, so it is charged in a specially insulated tank or vessel for transportation and storage, .

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 , The fuel tank 3 for liquid fuel is installed inside the hull 1 of the floating structure and the fuel tank 4 for the gas fuel is deformed to be installed on the deck of the floating structure as shown in Fig. have. 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 is a view schematically showing a piping system in which a fuel tank for a gaseous fuel is mounted in a space provided for loading a fuel tank inside the hull. There is shown a schematic view of a piping system in a case where a liquid fuel fuel tank is mounted in a space provided. 8 and Fig. 9 are views schematically showing a piping system in a case where a plurality of fuel tanks are provided inside the hull.

As shown in FIGS. 6 and 7, in order to mount different kinds of fuel tanks in the same space inside the hull, pipes suitable for the respective fuels must be connected.

For example, as shown in FIG. 6, when a fuel tank 4 for a gaseous fuel such as LNG is installed in a space inside the hull provided for loading a fuel tank, The pipe 40 can be connected.

The gas fuel piping 30 is preferably connected to the lower portion of the gas fuel fuel tank 4 and the evaporation gas pipe 40 is connected to the upper end of the gas fuel fuel tank 4, It is preferable that the fuel tank 4 is connected to the gas dome 4a formed at the upper end of the fuel tank 4. [

The gas fuel pipe 30 may be provided with an opening and closing valve 31 and a transfer pump 32 and the transfer pump 32 may be replaced with a pump installed inside the gas fuel fuel tank 4. In this case, the feed pump installed in the gaseous fuel pipe 30 can be eliminated. An open / close valve (41) may be installed in the piping (40) for the evaporation gas.

7, when the fuel tank 3 for liquid fuel such as heavy oil is provided in the space inside the hull provided for loading the fuel tank, the liquid fuel pipe 20 and the volatile gas are discharged A vent pipe 50 may be connected.

The liquid fuel piping 20 is preferably connected to the lower portion of the liquid fuel fuel tank 3 and the vent piping 50 is connected to the upper end of the liquid fuel fuel tank 3.

The liquid fuel piping 20 may be provided with an opening and closing valve 21 and a transfer pump 22 and the transfer pump 22 may be replaced with a pump installed inside the liquid fuel fuel tank 3. In this case, the feed pump installed in the liquid fuel pipe 20 can be eliminated.

6 and 7 show that the liquid fuel piping 20 is installed below the gas fuel piping 30, but this is only an example, and the present invention is not limited by the installation position. In the liquid fuel fuel tank 3, a head for piping connection (not shown) is provided at a position where the liquid fuel piping 20 can be aligned with the position where the liquid fuel piping 20 is installed. In the gas fuel fuel tank 4, It is preferable that a pipe connecting head (not shown) is provided at a position where the fuel piping 30 can be aligned with the position where the fuel piping 30 is installed.

As shown in FIGS. 8 and 9, when a plurality of fuel tanks are mounted in the hull, the piping system of the present invention can be used as a main gas to be connected to a device requiring fuel such as a propulsion device or a power generation device Fuel piping 35 and main liquid fuel piping 25 and one or more of these main gas fuel piping 35 and main liquid fuel piping 25 connected to respective fuel tanks 3 or 4 An auxiliary gas fuel pipe 36 and an auxiliary liquid fuel pipe 26. [

At this time, the number of mountable gas fuel fuel tanks 4 and the number of liquid fuel fuel tanks 3 may be equal to each other as shown in FIG. 8 or may be different from each other as shown in FIG.

8 (a) shows a state in which six liquid fuel fuel tanks 3 are connected to the main liquid fuel piping 25, and FIG. 8 (b) And six fuel gasses for gaseous fuel 4 are connected.

As shown in FIG. 8C, some of the plurality of fuel tanks mounted in the hull are mounted with the liquid fuel fuel tank 3, and the fuel tank is connected to the auxiliary liquid fuel pipe 26 And a part of the fuel tank for gas fuel 4 may be mounted, and the fuel tank may be used in connection with the auxiliary gas fuel pipe 36.

For example, as shown in FIG. 8 (c), two liquid fuel fuel tanks 3 are mounted, the fuel tank is connected to two auxiliary liquid fuel pipes 26, Four fuel-gas fuel tanks 4 may be mounted, and the fuel tank may be connected to four auxiliary gas fuel pipes 36, respectively.

In the propulsion unit 5 in which two or more different kinds of fuels can be mixed and used by changing the combination of the numbers of the liquid fuel fuel tank 3 and the gas fuel starter tank 4 as in the above embodiment, The mixing ratio of the fuel and the gaseous fuel can be adjusted depending on the case.

9 (a) shows a state where six liquid fuel fuel tanks 3 are connected to the main liquid fuel pipe 25, and FIG. 8 (b) shows the main gas fuel pipe 35 ) Connected to the fuel tank 4 for the gaseous fuel. The reason why the number of the liquid fuel fuel tanks 3 is more than the number of the gas fuel fuel tanks 4 is because of the restriction that limits the size of the liquid fuel fuel tanks 3, Of course.

The auxiliary liquid fuel piping 26 extending from the main liquid fuel piping 25 when the number of the liquid fuel fuel tanks 3 is different from the number of the gas fuel fuel tanks 4 as shown in Fig. And the number of auxiliary gas fuel pipes 36 extending from the main gas fuel pipe 35 may be different from each other so as to correspond to the number of fuel tanks. That is, the number of the auxiliary liquid fuel pipes 26 and the auxiliary gas fuel pipes 36 need not always be the same.

In the above description, the liquid fuel fuel tank 3 and the gas fuel fuel tank 4 are provided in the floating structure. However, the liquid fuel fuel tank is not necessarily installed, Fuel tanks (for example, LNG tanks and LPG tanks) for storing two or more different kinds of fuel among the fuels other than oil may be installed. In the floating structure in which the fuel tanks for storing two or more different kinds of fuel among the fuels other than the liquid fuel are installed, it is possible to use those capable of using these fuels other than the liquid fuel as the propulsion device.

10 to 13, an example in which the present invention is applied to a container ship equipped with a heterogeneous fuel propulsion system as a propulsion device will be described.

The container ship is loaded with a plurality of containers on the inside of the hull and on the upper deck except the cabin area 102 where the crews reside, the engine room where the propulsion device 105 is installed, the fuel tank 104, the machine room 108 and the like. It is preferable to move the cabin space 102 from the stern to the central portion of the ship (that is, from the position adjacent to the engine room located at the stern to the forward side not adjacent to the engine room) in order to ensure the visibility of the container line. The lower space of the cabin space 102, which is difficult to load containers for utilization, is utilized as a space in which the fuel tank 104 is disposed. In this specification, the central portion of the hull refers to the stern of the hull where the propulsion unit 105 is installed, that is, the portion ahead of the engine room, and does not necessarily mean the longitudinal center portion of the hull.

The present inventors have found that the use of a liquefied gas such as LNG as a fuel for a propulsion device for propelling a cargo ship such as a container ship 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 Suggest a plan. 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.

10 to 13 illustrate the use of ME-GI as the propulsion device 105 and the installation of the LNG fuel tank 104 as the fuel tank for the gas fuel in the lower portion of the cabin space 102. However, But is not limited thereto. An oil-in-fuel tank as a liquid fuel fuel tank for storing heavy oil to be used as fuel with the LNG in the propulsion unit 105 may be installed below the cabin zone 102 together with the LNG fuel tank 104, It may be installed inside the hull, such as an engine room.

According to the present invention, at least one of the LNG fuel tank and the heavy oil fuel tank is detachable from the hull and can be replaced with another kind of fuel tank. Further, according to the present invention, the number of LNG fuel tanks and the number of heavy oil fuel tanks mounted inside the hull can be adjusted according to the amount of fuel used.

As the LNG fuel tank 104, a membrane-type tank or a stand-alone tank may be used, and in particular, an IMO type B tank is preferably used. In other words, it is preferable that the LNG fuel tank 104 be a stand-alone tank so that the LNG fuel tank 104 can be attached to and detached from the inside of the hull, and among the various types of independent tanks, 11 and 13), it is particularly preferable to use an IMO type B tank which is installed as a secondary barrier.

Various devices for supplying fuel to the heterogeneous fuel propulsion system (gas injection engine) as the propulsion device 105 are preferably disposed in a machine room 108 located at the top of the LNG fuel tank 104. 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.

It is desirable that the distance between the LNG fuel tank 104 as the fuel tank and the machine room 108 be as close as possible to each other, since appropriate heat insulation is required for such a fuel supply device. If the distance between the LNG fuel tank 104 and the machine room 108 is long, heat loss is increased in terms of heat insulation to the transfer pipe for transferring the LNG.

Also, the machine room 108 is preferably located between the LNG fuel tank 104 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 utilize this space as a space in which the LNG fuel tank 104 is to be located. Further, It is desirable that the machine room 108 be located at the top of the LNG fuel tank 104 and at the same time as the bottom of the cabin area 102, since it is desirable to be located close to the fuel tank 104. [

It is also advantageous in terms of maintenance that the machine room 108 is disposed between the cabin space 102 and the LNG fuel tank 104.

In order to supply the LNG as the fuel stored in the LNG fuel tank 104 to the ME-GI engine as the propelling device 105, the LNG is supplied to the propelling device 105 via the machine room 108. At this time, a fuel supply pipe is installed on the lower side or the side surface of the hull to supply LNG as fuel from the machine room 108 to the propulsion unit 105.

10 and 11 schematically show a side view and a cross-sectional view of a floating structure (for example, a container line) for explaining a state of supplying fuel through the fuel supply lower pipe 120, and Figs. 11 and 13 A side view and a cross-sectional view of a floating structure (for example, a container line) for explaining a state of supplying fuel through the fuel supply side pipe 130 are schematically shown.

The fuel supply lower pipe 120 and the fuel supply side pipe 130 may be provided together, or only one of them may be provided. The piping for transferring the LNG from the LNG fuel tank 104 to the machine room 108 may be the same. That is, the LNG can be transferred to the machine room 108 by the transfer pump 142 and the transfer piping 140 installed below the LNG fuel tank 104.

11 and 13 show that two LNG fuel tanks 104 are provided inside the hull and LNG is separated from each LNG fuel tank 104 by a separate transfer pipe 140 and a transfer pump 142 in the machine room 108 The LNG can be transferred from the two LNG fuel tanks 104 through one main transfer pipe and the transfer pump as shown in FIG. Further, the transfer pump 142 does not need to be provided for each of the fuel tanks 104, and one transfer pump 142 is commonly used to transfer the fuel of the two or more fuel tanks 104 .

10 and 11, the LNG appropriately treated in the machine room 108 so that it can be used as fuel in the propulsion unit 105, when the lower piping 120 for fuel supply is installed, Is supplied to the propulsion device 105 through the lower pipe 120 for fuel supply installed in the space between the LNG fuel tank 104 and the hull bottom.

The position of the fuel supply lower pipe 120 is not limited to the position shown in Figs. 10 and 11, but also the space provided between the left and right ballast tanks at the center in the width direction of the hull (i.e., And the space surrounded by the left and right ballast tanks and the inner bottom surface of the hull). In addition, a space in which one or two rows of containers can be loaded from the inner bottom surface in a part of the space in which the container is loaded, that is, the center in the width direction of the hull, is changed to a space in which the fuel supply lower pipe 120 is installed .

A portion of the fuel supply lower pipe 120 extending downward from the machine room 108 to the lower space of the hull is provided in parallel with the transfer pipe 140 in front of the LNG fuel tank 104 in Figs. However, it is needless to say that the present invention is not limited to such a configuration.

Although the two fuel supply lower pipes 120 are shown in Fig. 11, the number of pipes can be appropriately changed at the time of designing, and it is possible to connect the propulsion device 105 It is of course possible to supply LNG.

12 and 13, the LNG appropriately treated in the machine room 108 so that it can be used as fuel in the propulsion unit 105 can be used as the fuel side side piping 130, as shown in FIG. 12 and FIG. Is supplied to the propulsion device 105 through the fuel supply side pipe 130 installed so as to extend along the passage way 113 above the left and right ballast tanks 112.

Although the two fuel supply side pipes 130 are shown in Fig. 13, the number of the piping can be appropriately changed at the time of designing, and it is possible to supply the fuel to the propulsion device 105 It is of course possible to supply LNG.

As the fuel supply lower pipe 120 and the fuel supply side pipe 130, a double pipe structure may be used for safety. In the case of a container ship, it is preferable that a pipe for supplying fuel is not installed in the upper space of the deck since the container is loaded above the upper deck.

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 described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes and modifications may be made by those skilled in the 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
20: piping for liquid fuel 21, 31, 41, 51: open / close valve
22, 32: transfer pump 25: main liquid fuel pipe
26: auxiliary liquid fuel piping 30: gas fuel piping
35: main gas fuel pipe 36: auxiliary gas fuel pipe
40: piping for evaporative gas 50: vent piping
102: cabin area 104: fuel tank
105: propulsion unit 108: machine room
111: Hull protection means 112: Ballast tank
113: Passage 120: Lower piping for fuel supply
130: side pipe for fuel supply 140: transfer pipe
142: Feed pump

Claims (7)

Floating structure with floating fuel propulsion system and floating at sea,
A propulsion device installed in the hull of the floating structure;
A fuel tank for storing fuel used in the propulsion device;
A pipe for supplying the fuel contained in the fuel tank to the propulsion device;
/ RTI >
Wherein the fuel tank is mounted on an upper deck of the floating structure. The method according to claim 1,
Wherein the fuel tank is a gas fuel fuel tank for storing gaseous fuel. The method according to claim 1,
Further comprising another fuel tank for storing fuel used in the propulsion device,
Wherein said another fuel tank is installed in said hull. The method of claim 3,
Wherein one of said fuel tank and said another fuel tank is a fuel tank for gaseous fuel storing gas fuel and the other is a fuel tank for liquid fuel for storing liquid fuel. The method according to claim 1,
A floating structure having a heterogeneous fuel propulsion system in which a cargo tank for storing cargo is installed in the hull. The method according to claim 1,
Wherein the propulsion device is a low pressure gas injection engine, a high pressure gas injection engine, and a gas turbine. As a ship floating on the sea with a different fuel propulsion system,
A propulsion device installed in the hull of the ship;
A fuel tank for storing fuel used in the propulsion device;
A pipe for supplying the fuel contained in the fuel tank to the propulsion device;
/ RTI >
Wherein the fuel tank is installed on an upper deck of the ship.

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