KR20160015869A - Hybrid propulsion system and method of floating structure - Google Patents

Abstract

The present invention relates to a system and a method for providing hybrid propulsion for a floating structure, and more specifically, to a system and a method for providing hybrid propulsion for a floating structure which can relatively reduce initial installation costs and maintenance and repair costs, relatively improve system efficiency and fuel consumption efficiency, and enhance flexibility in propulsion system operation by using a dual fuel diesel electric (DFDE) propulsion device and an MAN electronic-gas injection (ME-GI) engine individually or collectively in a propulsion system. According to the present invention, the system for providing propulsion for a floating structure comprises: a DFDE propulsion device to use oil and gas as fuel to generate a drive force required for propulsion; an ME-GI engine to use the oil and the gas as fuel to generate a drive force required for propulsion; a gear box to transfer the drive force of the DFDE propulsion device and the ME-GI engine to a propeller; and a propulsion selection unit to select any one or both of the DFDE propulsion device and the ME-GI engine for propulsion.

Description

[0001] The present invention relates to a hybrid propulsion system and a method of floating structure,

The present invention relates to a propulsion system and method for a floating structure, and more particularly, to a propulsion system and a propulsion system for a floating structure, and more particularly, To a hybrid propulsion system and method for a floating structure.

In general, when a steam turbine or a diesel engine is used to obtain propulsive force, a ship is required to be capable of supplying nitrogen oxides (NOx), sulfur oxides (SOx), carbon dioxide (CO ₂ ), etc. in the combustion process of fuels such as HFO Toxic substances are generated, thereby causing a cause of marine pollution. In order to solve this problem, LNG carrier and the like are used as electric propulsion system using dual fuel diesel electric (DFDG) engine using LNG and HFO as dual fuel, EPS) has been developed and used.

As a technique related to an electric propulsion system using a conventional DFDE engine, there is an evaporation gas treatment device of an LNG carrier of Korean Patent Laid-Open No. 10-2009-0022483. This is an evaporative gas processing apparatus for supplying evaporative gas generated from an LNG storage tank of a LNG carrier to a main propulsion unit and using the evaporative gas as a fuel, wherein the amount of evaporative gas generated in the LNG storage tank is used as fuel , Or when the pressure of the LNG storage tank is increased, the evaporation gas in the LNG storage tank is combusted in the inert gas generator and the auxiliary boiler, and the steam generated in the auxiliary boiler is condensed and discharged as water . Also, the main propulsion device uses DFDE as an electric propulsion device.

However, the electric propulsion system using the conventional DFDE has a problem in that the initial installation cost is increased, the efficiency is increased, the maintenance and repair cost is relatively higher than that of the conventional steam turbine system, The fuel consumption efficiency of the fuel cell is deteriorated.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to provide a fuel cell system and a fuel cell system which are relatively low in initial installation cost and maintenance and repair cost, have relatively high system efficiency and fuel consumption efficiency, The goal is to increase operational flexibility.

According to an aspect of the present invention, there is provided a propulsion system for a floating structure, comprising: a DFDE (Dual Fuel Diesel Electric) propulsion device for generating driving force required for propulsion using oil and gas as fuel; ME-GI engine (MAN Electronic-Gas Injection engine) that uses oil and gas as fuel to generate driving force necessary for propulsion; A gear box for transmitting the driving force of the DFDE propulsion device and the ME-GI engine to a propeller; And a propulsion source selection unit for propelling either or both of the DFDE propulsion unit and the ME-GI engine to propel the propulsion system.

The DFDE propulsion device and the ME-GI engine can use evaporative gas generated from a cargo tank as fuel.

The DFDE propulsion device may include a DF fuel engine using oil and gas as fuel; A generator for generating electricity by the DF engine; And an electric motor driven by electricity generated from the generator and connected to the gear box.

The DFDE propulsion device may further include a switching unit for switching the electric power generated from each of the plurality of generators to be selectively supplied to the electric motor.

The propulsion source selection unit may include an operation unit for operating either or both of the DFDE propulsion device and the ME-GI engine by operation.

The propulsion source selection unit may include a control unit for controlling the DFDE propulsion device and the ME-GI engine to drive either or both of the DFDE propulsion device and the ME-GI engine depending on whether the floating structure is requested or maneuvering .

According to another aspect of the present invention, there is provided a propulsion system for a floating structure, comprising: a DFDE propulsion device for generating driving force necessary for propulsion using oil and gas as fuel; And an ME-GI engine for generating driving force necessary for propulsion using oil and gas as a fuel, wherein the DFDE propulsion device and the ME-GI engine are selectively or selectively used for propelling the floating structure A hybrid propulsion system of a floating structure is provided.

According to another aspect of the present invention, there is provided a propulsion method for a floating structure, comprising: a preparation step for allowing a floating structure to be navigated by a driving force of a DFDE propulsion device and an ME-GI engine; And a propulsion step of driving either or both of the DFDE propulsion device and the ME-GI engine depending on whether the floating structure is requested speed or maneuvering, or a propulsion step of the floating propulsion structure is provided .

Wherein the propulsion step is performed by the DFDE propulsion device and the ME-GI engine when the required speed of the floating structure is less than the set speed, -It can be driven by all engines.

Wherein the propulsion step is propelled by either the DFDE propulsion unit or the ME-GI engine when the floating structure requires a menu burring, and wherein, when no menu burding is required, the DFDE propulsion unit and the ME -It can be driven by all engines.

According to the present invention, the initial installation cost and the maintenance and repair cost can be relatively lowered, and the system efficiency and fuel consumption efficiency can be relatively increased. In the propulsion system, the DFDE propulsion device and the ME- Thereby increasing the flexibility of the propulsion system operation.

1 is a block diagram illustrating a hybrid propulsion system of a floating structure according to an embodiment of the present invention.
2 is a flow chart illustrating a hybrid propulsion method of a floating structure according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, the following embodiments can be modified into various other forms, and the scope of the present invention is not limited to the following embodiments.

1 is a block diagram illustrating a hybrid propulsion system of a floating structure according to an embodiment of the present invention.

1, a hybrid propulsion system 100 of a floating structure according to an embodiment of the present invention includes a dual fuel diesel electric propulsion unit 110, a MAN-GI engine (ME-GI engine) The DFDE propulsion unit 110 and the ME-GI engine 120 may be used for propulsion of the floating structure, and the propulsion unit selection unit 140 may further include the gear box 130 and the propulsion source selection unit 140. In addition, Any one or all of them may be selectively used.

Floating structures can be, for example, LNG carriers, as well as all types of offshore structures that can use gas as fuel, such as LNG Regasification Vessel (LNG Regasification Vessel), container ships, general merchant vessels , LNG-FPSO (Liquefied Natural Gas-Floating Production Storage and Off-loading), and LNG-FSRU (Liquefied Natural Gas-Floating Storage and Regasification Unit).

The DFDE propulsion system 110 is an electric propulsion system (EPS) that uses oil and gas as a fuel to generate driving force necessary for propelling. For example, a DF engine an electric motor 112 driven by electricity generated from the generator 112 and connected to the gear box 130 via a rotary shaft, a generator 112 for generating electric power by the DF engine 111, (113).

The DFDE propulsion system 110 may include a plurality of DF engines 111. In this case, a plurality of generators 112 may correspond to each of the DF engines 111, and electric power generated from each of the generators 112 To be selectively supplied to the electric motor 113 by the switching unit 114. [ Here, the switching unit 114 is composed of an electronic circuit and an electronic device, and performs a switching operation to distribute and supply electricity generated from each of the generators 112 to a power source necessary for the operation of the electric motor 113, 113, and these operations can be performed according to the set value or the operation signal of the operator.

The ME-GI engine 120 uses oil and gas as fuel to generate driving force necessary for propulsion, and the driving shaft is connected to the gear box 130. [

The DFDE propulsion system 110 and the ME-GI engine 120 can use HFO (Heavy Fuel Oil) or MDO (Marine Diesel Oil) as the oil and use LNG as a gas by forcibly vaporizing or using it from the cargo tank 11 Naturally occurring boil-off gas can be used as fuel. The DF engine 111 of the DFDE propulsion system 110 and the ME-GI engine 120 of the DFDE propulsion system 110 are supplied with the evaporation gas from the cargo tank 11 to use the evaporation gas generated from the cargo tank 11 of the LNG as fuel A high pressure compressor 13 may be installed to supply a gas to the gas supply line 12 in a compressed state. At this time, a gas combustion unit (GCU) 14 may be installed at the downstream of the HP compressor 13 in the gas supply line 12 in order to consume excess evaporative gas.

The gear box 130 transmits the driving force of the DFDE propulsion device 110 and the ME-GI engine 120 to the propeller 150 so that the driving force of either the DFDE propulsion device 110 or the ME- , And may transmit the driving force of all of them to the propeller 150. For this purpose, any one of them may be provided with an idling gear or other idling when stopping or cutting off the driving force, State, or may be configured to shut off any one of them by adjusting the speed of the clutch or the position of the gear.

The propulsion source selection unit 140 can select either the DFDE propulsion unit 110 or the ME-GI engine 120 to be used for propulsion. For this purpose, for example, either the manipulation unit 141 or the control unit 142 One, or both. Here, the operation unit 141 drives either or both of the DFDE propulsion device 110 and the ME-GI engine 120 by the operation of the operator. The controller 142 may control the DFDE propulsion device 110 and the ME-GI engine 120 to drive either the DFDE propulsion device 110 or the ME-GI engine 120 depending on whether the floating structure is requested or maneuvered, This will be explained in the hybrid propulsion method of floating structure.

2 is a flow chart illustrating a hybrid propulsion method of a floating structure according to an embodiment of the present invention.

As shown in FIG. 2, the hybrid propulsion method for a floating structure according to an embodiment of the present invention may include a preparation step S11 and a propulsion step S12.

According to the preparation step S11, the floating structure can be navigated by the driving force of the DFDE propulsion device 110 and the ME-GI engine 120. For this purpose, the DFDE propulsion device 110 is driven through the gear box 130, And the ME-GI engine 120 to the propeller 150 so that either or both of the DFDE propulsion device 110 and the ME-GI engine 120 can be used as a propulsion source.

According to the propulsion step S12, either the DFDE propulsion device 110 or the ME-GI engine 120 is driven depending on whether the floating structure is requested or maneuvering. The propulsion step S12 may be performed by using a manual method by the operating unit 141 or by using the automatic method by the control unit 142 in order to select the DFDE propulsion device 110 and the ME- Method can be used.

The propulsion step S12 may be propelled by either the DFDE propulsion device 110 or the ME-GI engine 120 when the required velocity of the floating structure is less than the set velocity, 110 and the ME-GI engine 120, which can be performed automatically by a control operation of the controller 142, for example. For example, when the speed of the floating structure is increased by the operation of the speed control unit so that the speed of the floating structure is increased, the control unit 142 receives the speed control signal from the speed control unit, The DFDE propulsion device 110 and the ME-GI engine 120 are operated so that their driving forces are combined to be transmitted to the propeller 150 can do. The speed set here can be, for example, the sea speed when the floating structure is sailing without stopping or performing a large operation.

The propulsion step S12 may be propelled by either the DFDE propulsion unit 110 or the ME-GI engine 120 when the floating structure requires maneuvering, The DFDE propulsion device 110 and the ME-GI engine 120, which can be automatically performed by a control operation of the controller 142. [ For example, when the menu burring operation unit is operated to make a menu burring of a floating structure, the control unit 142 receives a menu burring signal from the menu burring operation unit, and the DFDE propulsion device 110 and the ME- The DFDE propulsion device 110 and the ME-GI engine 120 are operated so that their driving forces are combined and transmitted to the propeller 150 . The menu burring may be an anchoring operation, for example, from the start of descent before the arrival at the destination, or various manipulations of the speed of the floating structure forward or backward until berthing is performed immediately at the pier, And the corresponding speed maintenance or direction change of the floating structure may be applicable.

According to the hybrid propulsion system and method of the floating structure according to the present invention, the ME-GI engine 120 may be used in combination with the DFDE propulsion device 110 or may be separately operated, The DFDE propulsion unit 110 and the ME-GI engine 120 may be selectively used in the DFDE propulsion unit 110 and the ME-GI engine 120 when the navigation or high speed is required. So that the flexibility of operating the propulsion system can be enhanced.

By selectively using or mixing the DFDE propulsion device 110 and the ME-GI engine 120, it is possible not only to lower the high initial cost of the existing propulsion system but also to increase the propulsion efficiency, This makes it possible to construct a competitive system in terms of cost and performance of floating structures that are used for a long period of time.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention. It is.

11: cargo tank 12: gas supply line
13: HP Compressor 14: GCU
110: DFDE propulsion unit 111: DF engine
112: Generator 113: Electric motor
114: switching unit 120: ME-GI engine
130: gear box 140:
141: Operation section 142:
150: Propeller

Claims (10)

In a propulsion system of a floating structure,
DFDE (Dual Fuel Diesel Electric) propulsion system that generates driving force necessary for propulsion using oil and gas as fuel;
ME-GI engine (MAN Electronic-Gas Injection Engine) that uses oil and gas as fuel to generate driving force required for propulsion;
A gear box for transmitting the driving force of the DFDE propulsion device and the ME-GI engine to a propeller; And
A propulsion source selection unit for propelling any one or both of the DFDE propulsion system and the ME-GI engine to propulsion;
Wherein the hybrid propulsion system is a hybrid propulsion system. The method according to claim 1,
Wherein the DFDE propulsion device and the ME-GI engine,
Hybrid propulsion system of floating structure using evaporative gas generated from cargo tank as fuel. The method according to claim 1 or 2,
In the DFDE propulsion device,
DF Fuel engine using oil and gas as fuel;
A generator for generating electricity by the DF engine; And
An electric motor driven by electricity generated from the generator and connected to the gear box;
Wherein the hybrid propulsion system is a hybrid propulsion system. The method of claim 3,
In the DFDE propulsion device,
Further comprising a switching unit for switching the electric power generated from each of the plurality of generators to be selectively supplied to the electric motor. The method according to claim 1,
Wherein the propulsion source selection unit comprises:
And an operation unit for driving either or both of the DFDE propulsion device and the ME-GI engine by operation. The method according to claim 1 or 5,
Wherein the propulsion source selection unit comprises:
And a controller for controlling the DFDE propulsion device and the ME-GI engine to drive either or both of the DFDE propulsion device and the ME-GI engine depending on whether the floating structure is requested or maneuvering. In a propulsion system of a floating structure,
DFDE propulsion system that generates driving force necessary for propulsion using oil and gas as fuel; And
And an ME-GI engine for generating driving force necessary for propulsion using oil and gas as fuel,
Wherein the DFDE propulsion device and the ME-GI engine are selectively used for propelling the floating structure. In a propulsion method of a floating structure,
A preparation stage in which the floating structure is navigable by the driving force of the DFDE propulsion unit and the ME-GI engine; And
And driving the DFDE propulsion device and / or the ME-GI engine according to a request speed or a menu maneuvering of the floating structure. The method of claim 8,
Wherein,
The DFDE propulsion device and the ME-GI engine, if the required speed of the floating structure is less than the set speed, and to the DFDE propulsion device and the ME- The hybrid propulsion of the floating structure. The method of claim 8,
Wherein,
The DFDE propulsion device and the ME-GI engine if the floating structure requires a menu burring, and if the floating structure does not require menu burding, the DFDE propulsion device and the ME- The hybrid propulsion of the floating structure.

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