KR100961868B1 - Container ship with a fuel gas tank - Google Patents

Abstract

PURPOSE: A container ship which is equipped with a gas fuel tank is provided to include a hetero fuel propulsion system which simultaneously uses liquid fuel, such as heavy oil, and gas fuel, such as LNG, and to enable gas fuel to use with a fuel tank for liquid fuel and a fuel tank for gas fuel for propulsion. CONSTITUTION: A container ship which is equipped with a fuel tank for gas fuel comprises: a liquid fuel tank(103) which stores liquid fuel to be used as fuel; a gas fuel tank(104) which stores gas fuel to be used as fuel; and a hetero fuel propelling system which generates driving force by using the liquid fuel and the gas fuel which is supplied from the gas fuel tank and the liquid fuel tank. A pair of the gas fuel tanks is installed in the lower space of a steerage unit which is arranged in the upper side of the upper deck of the container ship. A reinforcing member which consists of a double-stage barrier is installed between the gas fuel tanks.

Description

Container ship with fuel tank for gas fuel {CONTAINER SHIP WITH A FUEL GAS TANK}

The present invention relates to a container ship having a fuel tank for gas fuel, and more particularly, to a liquid fuel fuel tank and a gas having a heterogeneous fuel propulsion system which can use a liquid fuel such as heavy oil and a gas fuel such as LNG. It relates to a container ship having a fuel tank for fuel and can be used for the promotion of gas fuel such as LNG.

In general, various vessels such as bulk cargo ships, container ships and passenger ships employ a fuel supply system that uses heavy oil (HFO) (or MDO) such as bunker C oil, which is a liquid fuel, as a propellant fuel.

In the case of burning heavy oil used as fuel in such a conventional fuel supply system, there is a problem that environmental pollution due to various harmful substances contained in the exhaust gas is serious. As the demand for environmental pollution is gradually strengthened around the world, regulations on propulsion systems using heavy oil as fuel oil are also being tightened, and the cost of satisfying such regulations is gradually increasing.

In addition, when oil prices rise due to depletion of fossil fuel or local instability, there are a number of operational problems, such as fuel costs of ships using heavy oil as fuel.

Therefore, as fuel oil of various ships, clean fuel such as LNG (or LPG, CNG, DME, etc.), which is a liquefied or gaseous gas fuel, is used instead of using heavy oil (or MDO) or using only a minimum amount. If the price of heavy oil (or MDO) is high or the environmental protection standard is high, LNG (or LPG, CNG, DME, etc.) is mainly used as fuel, and the price of heavy oil (or MDO) is low or environmental standard. In this low case, research on fuel supply systems that can mainly use heavy oil (or MDO) needs to be continued.

The present invention for solving the conventional problems, having a heterogeneous fuel propulsion system that can use a liquid fuel such as heavy oil and gas fuel such as LNG and at the same time having a fuel tank for liquid fuel and a fuel tank for gas fuel LNG and the like To provide a container ship that can be used to propel gas fuel.

According to an aspect of the present invention for achieving the above object, a container ship capable of transporting a plurality of containers, a fuel tank for liquid fuel for storing liquid fuel for use as fuel; A fuel tank for gas fuel, which stores gas fuel for use as fuel; A heterogeneous fuel propulsion system for generating propulsion by using the liquid fuel and the gas fuel supplied from the liquid fuel tank and the gas fuel tank; There is provided a container ship having a fuel tank for a gas fuel comprising a.

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

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

The fuel tank for gas fuel is preferably installed in the space below the cabin area disposed above the upper deck of the container ship.

Benches protruding inwardly are formed at left and right bottoms inside the hull of the container ship, and the fuel tank positioned adjacent to the bench among the gas fuel tank and the liquid fuel tank is inclined so as not to interfere with the bench portion. It is desirable to have wealth.

The fuel stored in the fuel tank for gaseous fuel is liquefied gas, and a recondenser, pump, cooler, vaporizer, and evaporator for treating the liquefied gas for use in a propulsion device or a power generation device on the upper portion of the fuel tank for gaseous fuel. Preferably, the machine room in which at least one of the gas compressors is installed is located.

Preferably, the propulsion device is a high pressure gas injection engine or a low pressure gas injection engine capable of generating power using different fuels.

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

It is preferable that the fuel tank for liquid fuel is detachable from the hull, and the fuel tank for gas fuel is detachable from the hull.

The fuel tank for liquid fuel may be replaced with the fuel tank for gas fuel, and the fuel tank for gas fuel may be replaced with the fuel tank for liquid fuel.

According to still another aspect of the present invention, there is provided a container ship capable of transporting a plurality of containers, comprising: a fuel tank for gas fuel storing gas fuel for use as fuel; A propulsion system for generating propulsion force using the gas fuel supplied from the fuel tank for gas fuel; There is provided a container ship having a fuel tank for a gas fuel comprising a.

The gas fuel tank is preferably an IMO type B independent tank.

According to the present invention as described above, it has a heterogeneous fuel propulsion system that can use a liquid fuel such as heavy oil and gas fuel such as LNG and at the same time have a fuel tank for liquid fuel and a fuel tank for gas fuel, gas fuel such as LNG Container ships are provided which can be used for propulsion.

Accordingly, according to the container ship of the present invention, instead of reducing the amount of liquid fuel such as heavy oil, clean gas fuel such as LNG can be used to prevent environmental pollution and to reduce fuel costs.

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

1-4 show schematic side views of various embodiments of a floating structure having a heterogeneous fuel propulsion system.

As shown in FIG. 1, a floating structure having a heterogeneous fuel propulsion system includes a plurality of fuel tanks 3 and 4 for storing fuel in the hull 1, and the fuel tanks 3 and 4. It includes a propulsion device (5) for generating a propulsion force by the fuel delivered from.

The heterogeneous fuel propulsion system includes a plurality of the fuel tanks 3 and 4 and the propulsion device 5 described above, and pipes for supplying the respective fuels contained in the fuel tanks 3 and 4 to the propulsion device 5. It can be configured to include.

In the present specification, the floating structure is a concept including all kinds of vessels such as bulk cargo ships, container ships, passenger ships, and the like, and an offshore plant such as oil FPSO, which is usually used while mooring at one point of the sea.

As shown in the figure, when the floating structure is a bulk cargo ship, a liquid cargo carrier, etc., in addition to the fuel tanks (3, 4) may include one or more storage tanks 7 that can store the cargo. These storage tanks 7 may contain a cargo that can be used as fuel, but it should be noted that in this case they are treated as cargo rather than fuel and therefore different from the fuel stored in the fuel tank herein. do.

According to the present embodiment, some of the fuel tanks 3, 4 (i.e., the fuel tank 3 for liquid fuel) generally include heavy oil (HFO), diesel oil (MDO), or the like, which are widely used as fuel for propulsion equipment. The liquid fuel of the can be stored, the remaining fuel tank (that is, the fuel tank for gas fuel 4) may be stored any one of the gas fuel, such as LPG, LNG, DME, CNG.

In the present specification, the expressions of liquid fuel and gas fuel are 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 fuel oil or diesel oil that maintains the liquid state when supplied to the propulsion unit is called liquid fuel, and LNG which is supplied in the gas state when supplied to the propulsion unit in the liquid state or the gas state when stored in the fuel tank. Fuels such as LPG, DME, and CNG are called gas fuels.

In general, it is preferable to use fuel gas containing hydrocarbon components such as LNG, LPG and CNG as fuel other than heavy oil.

LNG, or Liquefied Natural Gas, is a liquefied natural gas collected from a gas field, with methane as the main component. When LNG is liquefied by lowering the temperature or applying pressure, the volume is reduced to about 1/600, which is advantageous in terms of space efficiency.However, the boiling point is about 162 degrees below zero. Should be kept as

LPG, or liquefied petroleum gas, has a relatively low pressure (6) for heavy hydrocarbons (two or more carbon atoms) from crude oil or crude oil refinery, or heavy hydrocarbons from natural gas. ~ 7 kg / ㎠) was added to cool and liquefy. When liquefied, the volume is reduced to approximately 1/250, which is convenient for storage and transportation. The main components are propane and butane, and may contain small amounts of ethane, propylene, butylene, and the like.

CNG, or Compressed Natural Gas, is about 200 atmospheres compressed for use as fuel.

DME, or dimethyl ether, is a kind of ether, which is less flammable and nontoxic than LPG, and has a high oxygen content, so it does not generate soot during combustion and thus has less environmental load.

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

In FIG. 1, the fuel tank 3 for liquid fuel and the fuel tank 4 for gas fuel (eg, LNG, LPG, DME, CNG, etc.) are all illustrated as being installed inside the hull 1 of the floating structure. 2, the fuel tank 3 for liquid fuel is installed inside the hull 1 of the floating structure and the fuel tank 4 for gas fuel can be modified to be installed on the deck of the floating structure. have. In addition, the fuel tank for gas fuel 4 is installed inside the hull 1 of the floating structure and the fuel tank for liquid fuel 3 can be modified to be installed on the deck of the floating structure, of course.

On the other hand, as the propulsion device 5, a low pressure gas injection engine such as Dual Fuel Disel Electric (DFDE), for example, a high pressure gas injection engine such as ME-GI (Gas Injection engine of Man B & W), and a gas turbine, etc. Of course, as long as two or more different fuels can be used as fuel, other propulsion devices can be used.

In the present specification, the expression "you can use two or more heterogeneous fuels" means that two or more different fuels can be used at the same time, and that two or more different fuels can be used. The concept includes all the means that fuel can be selectively used as needed.

3 illustrates a method of additionally installing a fuel tank 4 for gas fuel, such as LNG, in a floating structure designed and constructed to have only one fuel tank 3 for liquid fuel, for example. The drawings are illustrated.

According to the method illustrated in FIG. 3, the hull of the floating structure is cut at an arbitrary position and separated into two parts, namely, the bow portion 1a and the stern portion 1b, and these bow portions 1a and the stern portion 1b. The additional hull portion 1c in which the fuel tank 4 is embedded is inserted between the two and integrated into one hull by welding or the like.

Meanwhile, according to the present invention, in addition to the method of additionally installing the fuel tank inside the hull as shown in FIG. 3, the fuel tank may be additionally installed on the deck of the floating structure as shown in FIG.

When a plurality of fuel tanks (3, 4) that can store two or more types of fuel from the initial design as shown in Figure 1 is installed in the hull 1, or as shown in Figure 3 can be stored another type of fuel later In the case where the fuel tanks 4 are added to the hull 1, these fuel tanks 3, 4 may be configured to be permanently attached to the hull 1, as shown in FIG. 4. It may be configured to be detached accordingly.

In the case of having a removable fuel tank 9 as shown in FIG. 4, it is possible to selectively mount a fuel tank capable of storing fuel of a greater amount in consideration of the amount of fuel used. Factors that determine the amount of fuel used include the type of propulsion system, the price of the fuel, and seasonal and environmental factors.

For example, the hull 1 of the floating structure is provided with a fuel tank 3 for liquid fuel, such as heavy oil, and a fuel tank 4 for gas fuel, such as LNG, respectively. If it is expected, the removable fuel tank 9 as the fuel tank for liquid fuel may be additionally mounted, and the removable fuel tank 9 as the fuel tank for gas fuel may be additionally installed if the amount of gas fuel is expected to be high.

In addition, when the amount of fuel used is small, it is also possible to remove the removable fuel tank 9, and to use the empty space inside the hull formed for this purpose, such as a space for cargo load.

For example, since gas fuel such as LNG has a lower density than liquid fuel such as HFO, when only a relatively dense liquid fuel is used, the removable fuel tank 9 is removed and the space inside the hull formed thereby is loaded. When the gas fuel is mainly used, the fuel tank for the gas fuel may be attached to the detachable fuel tank 9.

In addition, 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 kinds of fuel as needed. For example, LNG or LPG may be selectively stored in the same space as needed, and heavy or diesel oil may be selectively stored in the same space.

As such, according to the present invention, different types of fuel tanks may be selectively accommodated in one space as shown in FIG. 4, and different types of fuel may be selectively accommodated in the same space as shown in FIG. 5. have.

Hereinafter, referring to FIGS. 6 to 8, a heterogeneous fuel propulsion system is mounted as a propulsion device, and a liquid fuel fuel tank and a gas fuel fuel tank for storing liquid fuel and gas fuel to be supplied to the heterogeneous fuel propulsion system. It describes an example in which the present invention is applied to each container ship having a.

6 is a side view schematically showing a container ship in which a fuel tank for liquid fuel and a fuel tank for gas fuel are mounted in the hull, FIG. 7 is a schematic cross-sectional view taken along the line AA of FIG. 6, and FIG. 8 is a view of FIG. 6. Schematic cross section taken along line BB.

The container ship is the hull interior and upper deck 101a except for the cabin area 102 where the crew lives, the engine room 106 where the propulsion device 105 is installed, the space where the fuel tank 104 is installed, the machine room 108 and the like. A plurality of containers are loaded on the stack. When the size of the container ship is increased (for example, 14000 TEU), it is preferable to move the cabin compartment 102 from the stern to the center of the hull to secure the view, and thus the cabin compartment 102 which is difficult to load the container for efficient space utilization. The lower space of) is used as a space in which the fuel tank 104 is disposed. In the present specification, the center of the hull means a portion ahead of the stern of the hull provided with the propulsion device 105, and does not necessarily mean the central portion of the hull in the longitudinal direction.

The inventors of the present invention, as a fuel of a propulsion device for propelling a cargo ship such as a container ship, such as LNG (or LPG, DME), etc., in order to avoid increasing environmental regulations and cope with rising prices of liquid fuel such as heavy oil or diesel oil. Suggests the use of gas fuel with liquid fuel. For this purpose, as a propulsion system, 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 can be used as a fuel.

In Fig. 6, ME-GI is used as the propulsion device 105, and two gas fuel tanks 104 are installed in the lower space of the cabin compartment 102, and six liquid fuel fuels are provided in the stern side space. It is illustrated that the tank 103 is provided, but this invention is not limited only to this.

According to the present invention, at least one of the fuel tank 104 for gas fuel and the fuel tank 103 for liquid fuel is detachable from the hull and can be replaced with another type of fuel tank. In addition, according to the present invention, the number of the fuel tank 104 for gas fuel and the number of the fuel tank 103 for liquid fuel 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 the cabin compartment 102 in a space where the fuel tank can be installed, and six liquids are provided in the stern space. An example in which the fuel tank 103 for fuel is mounted is shown.

However, if the usage of the gas fuel is expected to increase further, two gas fuel fuel tanks 104 are installed in the space below the cabin compartment 102 in the space where the fuel tank can be installed, and the stern side thereof. In the space where six smaller fuel tanks can be installed, for example, four liquid fuel tanks 103 and two gas fuel tanks can be changed. However, this is only an example for clarity of understanding and the present invention is not limited only to the above number.

As the fuel tank 104 for gas fuel, a membrane type tank or a standalone tank may be used, and particularly, an IMO type B tank is preferably used. In other words, the gas tank fuel tank 104 is preferably a stand-alone tank in order to be attached to or detached from the inside of the hull, and among the various types of stand-alone tanks, the hull protection means is located below the tank (between the tank and the bottom of the hull). Particular preference is given to using IMO type B tanks which are installed as car barriers.

In the case of type A of the independent tank, the hull itself should be made of expensive metal that can withstand cryogenic temperatures, which is not preferable because of the increase in the construction cost of the hull, and in the case of type C, the cylindrical pressure vessel should be used, which is not preferable in terms of space efficiency. .

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

When using liquefied gas in a cryogenic state as a fuel, proper insulation is required for such a fuel supply device, and therefore, the distance between the gas tank fuel tank 104 as the fuel tank and the machine room 108 is preferably as close as possible. . If the distance between the gas fuel tank 104 and the machine room 108 is far, the heat loss is increased in terms of heat insulation to the transfer pipe for transporting LNG is not preferable.

In addition, as shown in FIG. 8, the machine room 108 is preferably located between the fuel tank 104 for gas fuel and the cabin region 102. As described above, since it is difficult to load a cargo such as a container in the lower part of the cabin area 102, it is preferable to use this space as a space where the fuel tank is to be located, and furthermore, the machine room 108 is a fuel tank for gas fuel. Since it is preferable to be located close to 104, it is preferred that the machine room 108 be located as a result of the lower portion of the cabin compartment 102 and at the top of the fuel tank 104 for gas fuel.

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

As illustrated in FIGS. 7 and 8, benches 119 protruding inwardly are formed at left and right bottom edges inside the hull of the container ship. Bench 119 is formed for structural hull reinforcement and ballast capacity of the hull. The bench 119 needs to change the shape of the fuel tanks 103 and 104.

It is preferable that the inclined portions 103a and 104a inclined at a predetermined angle are formed on the left and right inner wall bottoms of the fuel tanks 103 and 104 located on the left and right sides of the hull, adjacent to the bench. Considering only the storage capacity of the fuel tanks 103 and 104, it is advantageous to have a shape corresponding to the bench 119, but the inclined portions 103a and 104a for ease of fabrication of the fuel tanks 103 and 104 and for avoiding stress concentration. It is desirable to manufacture to have.

On the other hand, as shown in Figure 8, it is preferable that a reinforcing member 107 consisting of a pair of partitions (that is, double partitions) between the two fuel tanks for gas fuel 104 is installed. This reinforcing member 107 can support the load while preventing the shaking (vibration) of the upper structure, that is, cabin area 102.

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

According to the present invention, the liquid fuel tank 103 and the gas fuel tank 104 may be detachably mounted from the hull. In addition, gas fuels such as LPG and CNG other than LNG may be used as the gas fuel, and heavy oil or diesel oil may be used as the liquid fuel. The fuel tank for liquid fuel may be additionally installed in a separate place in the hull such as the bow side of the engine room 106 in addition to the spaces shown in FIGS. 6 and 7.

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

The price and efficiency of each fuel may vary according to the times and according to various factors, but according to the present invention, the most efficient fuel can be selectively selected and used for propulsion at the present time. In addition, when development of highly efficient electric propulsion systems, solar systems, or wind power systems is completed in the near future, the present invention can be used to construct multiple fuel propulsion systems.

In addition, the above description has been made that the fuel from the fuel tank is supplied to a propulsion device consisting of a gas injection engine such as a ME-GI engine or a DFDE engine, the fuel is a gas in addition to the engines described above for generating power It may be supplied to a turbine or the like.

Although the floating structure having a fuel tank for gas fuel according to the present invention has been described with reference to the accompanying drawings as described above, the present invention is not limited by the embodiments and drawings described above, and is seen within the claims. Various modifications and variations can be made by those skilled in the art to which the invention pertains.

1 is a schematic side cross-sectional view of a floating structure having a heterogeneous fuel propulsion system in accordance with one embodiment of the present invention;

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

3 is a view for explaining a method of additionally installing another type of fuel tank in a floating structure designed and constructed to have only one type of fuel tank,

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

5 is a view for explaining the concept of selectively receiving different types of fuel in one same space according to the present invention,

6 is a side view schematically showing a container ship equipped with a fuel tank for liquid fuel and a fuel tank for gas fuel in the hull;

7 is a schematic cross-sectional view taken along the line A-A of 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 1c: additional hull

1d: opening 3: fuel tank for liquid fuel

4: fuel tank for gas fuel 5: propulsion device

7: storage tank 9: removable fuel tank

101a: Upper deck 102: Cabin space

103: fuel tank for liquid fuel 103a, 104a: inclined portion

104: fuel tank for gas fuel 105: propulsion device

106: engine room 108: machine room

107: reinforcing member 119: bench

Claims (12)

As a container ship which can transport a large number of containers, A fuel tank for liquid fuel for storing liquid fuel for use as fuel; A fuel tank for gas fuel, which stores gas fuel for use as fuel; A heterogeneous fuel propulsion system for generating propulsion by using the liquid fuel and the gas fuel supplied from the liquid fuel tank and the gas fuel tank; Including; The pair of fuel tanks for gas fuel is installed in a space below the cabin area disposed above the upper deck of the container ship, a reinforcement member consisting of a double bulkhead is installed between the pair of fuel tanks for gas fuel, Benches protruding inwardly are formed at left and right bottoms inside the hull of the container ship, and the fuel tank positioned adjacent to the bench among the gas fuel tank and the liquid fuel tank is inclined so as not to interfere with the bench portion. Container ship having a fuel tank for gas fuel, characterized in that it has a portion. The method according to claim 1, The fuel tank for gas fuel is a container ship having a fuel tank for gas fuel, characterized in that the independent tank. The method according to claim 2, The independent tank is a container ship having a fuel tank for gas fuel, characterized in that the IMO type B tank. delete delete The method according to claim 1, The fuel stored in the fuel tank for gaseous fuel is liquefied gas, and a recondenser, pump, cooler, vaporizer, and evaporator for treating the liquefied gas for use in a propulsion device or a power generation device on the upper portion of the fuel tank for gaseous fuel. Container ship having a fuel tank for gas fuel, characterized in that the machine room is installed at least one of the gas compressor. The method according to claim 1, The propulsion device is a container ship having a fuel tank for gas fuel, characterized in that the high-pressure gas injection engine or low-pressure gas injection engine capable of generating power using heterogeneous fuel. The method according to claim 1, The propulsion device is a container ship having a fuel tank for gas fuel, characterized in that the gas turbine which can generate power using the gas fuel. The method according to claim 1, The fuel tank for liquid fuel is detachable from the hull, and the fuel tank for gas fuel is removable from the hull container ship having a fuel tank for gas fuel, characterized in that. The method according to claim 1, The fuel tank for liquid fuel is replaceable to the fuel tank for gas fuel, the fuel tank for gas fuel is a container ship having a fuel tank for gas fuel, characterized in that replaceable to the fuel tank for liquid fuel. As a container ship which can transport a large number of containers, A fuel tank for gas fuel, which stores gas fuel for use as fuel; A propulsion system for generating propulsion force using the gas fuel supplied from the fuel tank for gas fuel; Including; The pair of fuel tanks for gas fuel is installed in a space below the cabin area disposed above the upper deck of the container ship, a reinforcement member consisting of a double bulkhead is installed between the pair of fuel tanks for gas fuel, Benches protruding inwardly are formed at left and right bottoms inside the hull of the container ship, and inclined portions are formed at portions adjacent to the benches of the fuel tank for gas fuel so as not to interfere with the bench portions. Container ship with fuel tanks. The method according to claim 11, The fuel tank for gas fuel is a container ship having a fuel tank for gas fuel, characterized in that the IMO type B independent tank.

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