KR20130021204A

KR20130021204A - Electric propulsion type lng fuel supply vessel

Info

Publication number: KR20130021204A
Application number: KR1020110083589A
Authority: KR
Inventors: 허승남; 이재익
Original assignee: 에스티엑스조선해양 주식회사
Priority date: 2011-08-22
Filing date: 2011-08-22
Publication date: 2013-03-05

Abstract

An electric propulsion LNG fuel oil supply line is disclosed. An electric propulsion LNG fuel oil tanker according to an embodiment of the present invention loads LNG from an LNG terminal, and the LNG fueling vessel (1) is moored to the LNG fuel propulsion vessel (2) being moored to refuel the LNG fuel, which is generated during oil supply. By burning a large amount of boil-off gas and recovery gas to drive a generator to generate electricity, and storing the generated electricity in the capacitor to operate using the stored electricity, LNG fuel vessels store liquefied fuel gas far from the port for refueling In order to reduce the time and cost of supplying LNG to the facility, the total cost can be reduced through the system of lubricating LNG refueling vessels side by side with the LNG fuel propulsion vessels berthing in the inner port or in cargo operation or waiting. LNG fueled vessels by refueling LNG using LNG refueling vessels to the LNG fueled vessels at anchor or working Additional time and cost savings can be achieved, and fuel lines powered by a Dual Fuel Diesel Engine (DFDE) engine can be burned to produce electricity by burning a large amount of evaporation / recovery gas generated during refueling, and to generate electricity. By refueling, the fuel consumption can be reduced by using electricity stored in the capacitor during operation after refueling.

Description

Electric propulsion type LNG fuel supply vessel

The present invention relates to an electric propulsion LNG fuel oil tanker, and more particularly, in order to reduce the time and cost of the LNG fuel ship to go to the liquefied fuel gas storage facility far from the port for refueling to supply LNG, The present invention relates to an electric propulsion LNG fuel oil tanker which reduces the overall cost through a system of lubricating an LNG fuel tanker side by side with a LNG fuel propulsion ship in cargo operation or on standby.

Although LNG has never been used as a fuel in ships except LNG carriers, ships that use natural liquefied gas (LNG), which has recently been spotlighted as an eco-friendly fuel due to emission gas environmental regulations, that is, LNG Fuel propulsion ships have emerged, and they are on the rise.

Currently, LNG fuel propulsion vessels are used for small vessels that operate short distances, such as offshore passengers and cargo carriers, mainly in Norway, and platform supply vessels (PSVs), which are offshore operations support ships.

In order to receive LNG from a general vessel, a facility for supplying LNG to a quay wall is required. Currently, LNG fuel propulsion vessels are directly anchored at LNG storage bases on land, or vehicles loaded with LNG tanks are approaching and refueling LNG while the vessels are anchored.

The concept of LNG fuel oil tanker is being introduced, but mainly developed for small vessels, and it has not been able to present a model of LNG fuel oil tanker with LNG fuel supply system for general commercial vessels such as large container ships or large tankers.

On the other hand, the LNG fuel oil tanker has been proposed to re-liquefy and store the natural gas generated in the LNG fuel supply and a large amount of recovered gas in the fuel tank itself.

However, these conventional techniques are small in the case of a small ship operating a short distance, the capacity of the LNG fuel tank is small, it is possible to refuel onshore LNG fuel using a truck (Truck), but the actual operating distance is long and the capacity of the fuel tank In the case of this large large ship, a large number of refueling trucks are required, and a large amount of refueling time is required, resulting in a delay in the operation of the ship.

In addition, when refueling at the LNG storage base, the LNG fuel propulsion vessel needs additional movement for refueling the LNG fuel, there was a problem that requires a separate time and cost.

In addition, if there is an LNG storage base on land, the eyepiece facility and the LNG fuel supply facility for docking the LNG fuel propulsion vessel should be installed separately, which requires a huge cost for preparing additional dock docking facilities and unloading facilities. There was.

In addition, when several LNG fuel propulsion vessels need to be refueled at the same time, there was a problem that additional waiting time is required due to the wharf congestion of the storage base.

In addition, Patent Application No. 10-2009-0098986 discloses a technique for re-liquefying and storing natural evaporated gas and a large amount of recovered gas generated during LNG refueling in an LNG fuel tanker, but such a conventional technique uses a high pressure compressor. This not only adds considerable size of reliquefaction plant and costs, but also causes the problem of additional fuel consumption for the operation of the plant, and also in this application there are two types of gas compressors and high pressure vessels. There is a problem in that the additional cost is required, such as additionally needed to increase the manufacturing cost.

In addition, a vessel equipped with the electric propulsion system as shown in FIG. 1 is used as the LNG fuel oil supply line.

In the electric propulsion system as shown in FIG. 1, unlike the conventional propulsion system for directly connecting the engine and the propeller to the shaft, the engine 110 is driven to drive the generator 112, and the electricity produced by the generator 112. Drives the motor 114, which drives the propeller 118 through the shaft 116.

When the electric propulsion system as described above is applied to the vessel, the space utilization of the vessel can be increased, vibration, noise and fuel consumption can be reduced, and environmental pollution can be reduced by reducing the emission gas. The development of the electric propulsion system is spurring.

In the related art, a dual fuel engine was used as the engine 110 for driving the generator 112. The dual fuel engine refers to a four-stroke diesel engine driven by using any one or more of fuel oil and gas, and is mainly applied to a liquefied natural gas carrier. In this case, a liquefied natural gas carrier Refers to an engine that uses naturally evaporated gas as part of its fuel in its storage tank.

However, when the electric propulsion system as described above is applied to a vessel, the number of cylinders of the four-stroke diesel engine is large, the hull space utilization is low, and there are many difficulties in maintaining and maintaining the cylinders of the drivers.

An object of the present invention devised to solve the problems of the prior art is to dock the cargo in the inner port to reduce the time and cost of LNG fuel ships go to the liquefied fuel gas storage facility far from the port for refueling the supply of LNG The present invention provides an electric propulsion LNG fuel oil tanker to reduce the overall cost through a system in which the LNG fueling vessel is docked and refueled to the LNG fuel propulsion vessel in operation or in standby.

Another object of the present invention is to provide an electric propulsion LNG fuel oil tanker to reduce the additional time and cost of the LNG fuel vessel by lubricating the LNG fuel vessel to the LNG fuel vessel that is in operation or waiting in the harbor. In providing.

Still another object of the present invention is to produce electricity by burning a large amount of evaporation / recovery gas generated during refueling in a refueling line propelled by a DFDE (Dual Fuel Diesel Engine) engine to generate electricity, and storing it in an electric battery. In addition, after refueling, the present invention provides an electric propulsion LNG fuel oil supply line that can reduce fuel consumption by using electricity stored in a capacitor.

According to an aspect of the present invention, by loading LNG from the LNG terminal, the LNG fueling vessel is moored to the LNG fuel propulsion vessel moored to refuel the LNG fuel, by burning a large amount of evaporated gas and recovery gas generated during the refueling generator It is possible to provide an electric propulsion system of the electric propulsion LNG fuel oil supply line, characterized in that to drive the electricity to produce, and to store the produced electricity in the capacitor to operate using the stored electricity.

Here, the electricity can be produced by driving the DFDE engine of the LNG refueling vessel using the evaporated gas and the recovered gas generated in the fuel tank and the LNG fuel supply pipe of the LNG fuel propulsion vessel.

According to another aspect of the invention, the LNG fueling vessel is docked to the LNG fuel propulsion vessel connecting the LNG fuel supply pipe and the boil-off gas recovery pipe; Transferring the LNG in the fuel tank of the LNG refueling vessel to the fuel tank of the fuel LNG fuel propulsion vessel using a fuel tank pump; Producing and accumulating electricity by driving a DFDE (Dual Fuel Diesel Engine) engine of an LNG refueler using an evaporative gas generated from a fuel tank and an LNG fuel supply pipe of an LNG fuel propulsion vessel; And an LNG fuel oil tanker is operated using the stored electricity. An electric propulsion method of the LNG fuel oil tanker may be provided.

According to the present invention, in order to reduce the time and cost of supplying LNG to a liquefied fuel gas storage facility far from a port for refueling an LNG fuel vessel, an LNG refueling vessel may be provided to an LNG fuel propulsion vessel that is in operation or waiting for cargo in the inner port. Through lubrication system docked side by side has the effect of reducing the overall cost.

In addition, the present invention has the effect of reducing the additional time and cost of the LNG fuel vessel by lubricating the LNG using the LNG fueling vessel to the LNG fuel vessel in operation or waiting in the harbor.

In addition, the present invention burns a large amount of evaporation / recovery gas generated during refueling to the fuel oil tank propulsion by the DFDE (Dual Fuel Diesel Engine) engine to turn the generator to produce electricity, stored in an electric battery (battery), Subsequently, it is possible to reduce fuel consumption by using the electricity stored in the capacitor during operation.

1 is a schematic view of a vessel equipped with a conventional electric propulsion system.
Figure 2 is a schematic diagram showing a refueling system of the electric propulsion LNG fuel oil supply line according to an embodiment of the present invention.
Figure 3 is a flow chart for explaining the electric propulsion navigation method of the LNG fuel oil supply line according to an embodiment of the present invention.

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

Figure 2 is a schematic diagram showing a refueling system of an electric propulsion LNG fuel oil supply line according to an embodiment of the present invention.

Referring to FIG. 2, an electric propulsion LNG fuel oil tanker is provided, which loads LNG from an LNG terminal and feeds LNG fuel by moored to the current side of the anchored LNG fuel propulsion vessel 2.

Here, electricity may be produced by driving the DFDE engine 8 of the LNG fueling vessel 1 using the evaporated gas generated in the fuel tank 6 and the LNG fuel supply pipe 5 of the LNG fuel propulsion vessel 2.

At this time, the electricity produced by driving the DFDE engine 8 is used as the power of the LNG oil supply line (1).

By using the electric power thus produced in the LNG tanker 1, it is not necessary to use large equipment as in the existing LNG regasification equipment, and it is possible to reduce additional cost loss (fuel) for generating electric power. .

Hereinafter, the electric propulsion navigation method of the LNG fuel oil tanker according to an embodiment of the present invention will be described.

3 is a flow chart for explaining the electric propulsion navigation method of the LNG fuel oil supply line according to an embodiment of the present invention.

Referring to FIG. 3, the LNG fueling vessel 1 docks at the side of the LNG fuel propulsion vessel 2 to connect the LNG fuel supply pipe 5 and the boil-off gas recovery pipe 7.

Then, the LNG in the fuel tank 3 of the LNG fueling vessel 1 is transferred to the fuel tank 6 of the fuel LNG fuel propulsion vessel 2 using the fuel tank pump 4.

At this time, the DFDE (Dual Fuel Diesel Engine) engine 8 of the LNG fueling vessel 1 is driven by using the boil-off gas generated from the fuel tank 6 and the LNG fuel supply pipe 5 of the LNG fuel propulsion vessel 2. Produce electricity.

At this time, the produced electricity is stored in the capacitor 9, and used as the power of the LNG oil supply line (1).

As described above, the present invention provides an LNG fuel propulsion ship that is in operation or waiting for cargo in the inner port to reduce the time and cost of supplying LNG to a liquefied fuel gas storage facility far from the port for refueling the LNG fuel vessel. LNG refueling vessels can be moored side by side to reduce overall costs.

In addition, the present invention can reduce the additional time and cost of the LNG fuel vessel, by refueling the LNG fuel vessel using the LNG fuel ship to the LNG fuel vessel in operation or waiting in the port, DFDE (Dual Fuel Diesel) An oil supply line driven by an engine burns a large amount of evaporation / recovery gas generated during refueling to turn a generator to generate electricity, and store it in an electric battery. By using it, fuel consumption can be reduced.

1: LNG oil tanker
2: LNG fuel propulsion ship
3: fuel tank of oil tanker
4: fuel tank pump
5: LNG fuel supply pipe
6: propulsion tank fuel tank
7: boil-off gas recovery pipe
8: DFDE engine
9: capacitor

Claims

LNG is loaded from the LNG terminal, and the LNG fueling vessel 1 is moored to the moored LNG fuel propulsion vessel 2 to supply LNG fuel. The electric propulsion LNG fuel oil supply line, characterized in that for producing electricity, and storing the produced electricity in the capacitor to operate using the stored electricity.

The method of claim 1,
Electricity is generated by driving the DFDE engine 8 of the LNG refueling vessel 1 fueled by the boil-off and recovery gas generated from the fuel tank 6 and the LNG fuel supply pipe 5 of the LNG fuel propulsion vessel 2. An electric propulsion LNG fuel oil supply line, characterized in that.

Connecting the LNG fuel supply pipe and the boil-off gas recovery pipe by the LNG fueling vessel moored to the LNG fuel propulsion ship;
Transferring the LNG in the fuel tank of the LNG refueling vessel to the fuel tank of the fuel LNG fuel propulsion vessel using a fuel tank pump;
Producing and accumulating electricity by driving a DFDE (Dual Fuel Diesel Engine) engine of an LNG refueler using an evaporative gas generated from a fuel tank and an LNG fuel supply pipe of an LNG fuel propulsion vessel; And
A step of operating the LNG refueler using the stored electricity;
Electric propulsion operation method of LNG fuel oil supply line comprising a.

The method of claim 3,
An electric propulsion operation method of an LNG fuel oil supply line, characterized in that for storing the electricity produced by driving the DFDE engine (8) in a capacitor (9), and used as the power of the LNG oil supply line (1).