WO2015167131A1 - Power plant system, submerged storage tank of same power plant system, and installation structure of same submerged storage tank - Google Patents

Power plant system, submerged storage tank of same power plant system, and installation structure of same submerged storage tank Download PDF

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Publication number
WO2015167131A1
WO2015167131A1 PCT/KR2015/003164 KR2015003164W WO2015167131A1 WO 2015167131 A1 WO2015167131 A1 WO 2015167131A1 KR 2015003164 W KR2015003164 W KR 2015003164W WO 2015167131 A1 WO2015167131 A1 WO 2015167131A1
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WO
WIPO (PCT)
Prior art keywords
storage tank
power plant
submersible
lng
power
Prior art date
Application number
PCT/KR2015/003164
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French (fr)
Korean (ko)
Inventor
이홍규
Original Assignee
대우조선해양 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from KR1020140053054A external-priority patent/KR101606691B1/en
Priority claimed from KR1020140056660A external-priority patent/KR101559413B1/en
Application filed by 대우조선해양 주식회사 filed Critical 대우조선해양 주식회사
Publication of WO2015167131A1 publication Critical patent/WO2015167131A1/en
Priority to PH12016502117A priority Critical patent/PH12016502117A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B27/00—Arrangement of ship-based loading or unloading equipment for cargo or passengers
    • B63B27/30—Arrangement of ship-based loading or unloading equipment for transfer at sea between ships or between ships and off-shore structures
    • B63B27/34—Arrangement of ship-based loading or unloading equipment for transfer at sea between ships or between ships and off-shore structures using pipe-lines

Definitions

  • the present invention relates to a power plant, and more specifically, the LNG supply to the power plant to produce power from the outside, submersible storage tank for storing LNG so that power can be produced even in areas where gas is not available from the land
  • the present invention relates to a power plant system which can be installed on the seabed separately from a power plant and receive power generation fuel from the storage tank, a submersible storage tank of the power plant system, and an installation structure of the submersible storage tank.
  • Onshore thermal power plants have a problem that the initial installation cost of the facility increases because the volume is too large, there is a problem that the consumption of buildings, piping, materials increases as the facilities and systems are independently located in a separate building.
  • BMPP Barge Mounted Power Plant
  • FSPPs Floating and Storage Power Plants
  • Floating power plants need to have calm water and no waves for safe development. It is not easy to find a place that meets these conditions. Therefore, as a complementary measure, a breakwater should be made and a special mooring method should be applied.
  • the conventional floating storage gas power plant has a problem that sloshing occurs because the storage tank is floated on the sea, and thus friction heat is generated to generate a large amount of BOG (Boil Off Gas), and the BOG treatment cost There is a growing problem.
  • BOG Bit Off Gas
  • the present invention is to supply the power plant to produce electricity from the outside, the generation of submersible storage tank for storing LNG to enable the power production even in areas where gas is not available from the land
  • the purpose of the present invention is to provide a power plant system, a submersible storage tank of the power plant system, and a submersible storage tank installation structure, which can significantly reduce the amount of BOG generated since the heat transmitted to the storage tank is significantly lower than that of the sea. have.
  • the present invention provides a power generation plant having a power generation module;
  • Submersible storage tank is installed on the seabed to produce electricity by supplying LNG to the power generation module;
  • a power plant system comprising a connection pipe for connecting the power plant and the submersible storage tank for LNG supply.
  • the submersible storage tank includes a tank body having a double wall structure by an inner wall and an outer wall; A ballast tank formed between an inner wall and an outer wall of the tank body; And it may include a connecting portion formed in the tank body so that the connecting pipe can be connected.
  • the submersible storage tank includes a pipe assembly extending to the inner bottom of the submersible storage tank for the discharge of LNG; And it may include a discharge pump mounted to the bottom of the pipe assembly.
  • the submersible storage tank includes upper and lower open / close valves for supplying ballast water into the ballast tank.
  • connection part may include a liquid and / or gas dome, and the connection pipe may be connected to a plurality of unit connection pipes.
  • connection pipe is installed at the connection portion of the unit connection pipe, and the connection pipe may be provided with a plurality of liquid passages and an evaporation gas passage therein.
  • a regasification facility may be installed in the power plant, and a blow out preventer (BOP) may be installed in the submersible storage tank.
  • BOP blow out preventer
  • a ballast water pump may be installed in the submersible storage tank, and the power plant and the storage tank may be separately transported and installed.
  • LNG loading may be performed between the submersible storage tank and the LNG bunkering vessel in water irrespective of the power plant.
  • the submersible storage tank is a tank body consisting of a multi-bulk wall structure; A ballast water tank formed between the multiple partition walls; And it may include a concrete tank formed between the multiple partition walls.
  • the power plant includes a jack up unit, and the jack up unit may be installed vertically up to the bottom of the sea, and installed up-down.
  • the present invention is installed on the seabed for supplying LNG to the power plant having a power generation module for producing power, and provides a submersible storage tank of the power plant system connected to the power plant through a connecting pipe.
  • the present invention is a foundation plate is installed on the seabed surface, the center seating groove having a guide inclined surface is formed on the top of the foundation plate, the submersible storage tank of the submersible storage tank to be coupled to the foundation plate Provided by the guide inclined surface on the bottom surface provides a submersible storage tank installation structure of the power plant system is formed with a center seating projection is inserted into the center seating groove.
  • the present invention allows the supply of LNG to the power plant from the outside, but since the submersible storage tank for storing LNG is installed on the seabed separately from the power plant, it is impossible to supply gas from land It is possible to produce power stably even at.
  • the present invention is because the storage tank is safely installed on the sea floor even if the power plant is exposed to danger due to sudden bad weather, there is no environmental damage due to storage tank damage.
  • the present invention can produce a power plant and a storage tank separately at the same time, it is possible to significantly shorten the air.
  • the present invention reduces the lifting load (Lifting Load) because the transport and installation of the power plant and the storage tank separately, respectively (Installation).
  • the present invention can supply LNG to a variety of gas-related facilities, such as FSRU or land LNG terminal, as well as the power plant in the storage tank installed on the seabed.
  • the present invention can be widely used in various gas-related fields because the storage tank can be moved.
  • the present invention is designed so that the position of the power plant is fixed by the jack-up unit can safely produce power without being affected by the weather conditions of the sea.
  • FIG. 1 is a perspective view showing a power plant system according to a first embodiment of the present invention
  • Figure 2 is a side view showing a power plant system according to a first embodiment of the present invention
  • Figure 3 is a longitudinal sectional view showing a submersible storage tank according to an embodiment of the present invention
  • Figure 4 is a longitudinal sectional view showing a submersible storage tank according to another embodiment of the present invention.
  • FIG. 5 is a perspective view showing a power plant system according to a second embodiment of the present invention.
  • Figure 6 is a side view showing a power plant system according to a second embodiment of the present invention.
  • Figure 7 is a longitudinal sectional view showing a submersible storage tank installation structure in the present invention
  • the present invention provides a power generation plant having a power generation module; Submersible storage tank is installed on the seabed to produce electricity by supplying LNG to the power generation module; And it provides a power plant system comprising a connection pipe for connecting the power plant and the submersible storage tank for LNG supply.
  • the submersible storage tank includes a tank body having a double wall structure by an inner wall and an outer wall; A ballast tank formed between an inner wall and an outer wall of the tank body; And it may include a connecting portion formed in the tank body so that the connecting pipe can be connected.
  • the submersible storage tank includes a pipe assembly extending to the inner bottom of the submersible storage tank for the discharge of LNG; And it may include a discharge pump mounted to the bottom of the pipe assembly.
  • the submersible storage tank may include upper and lower opening and closing valves for supplying ballast water to the inside of the ballast tank.
  • connection part may include a liquid and / or gas dome, and the connection pipe may be connected to a plurality of unit connection pipes.
  • connection pipe is installed at the connection portion of the unit connection pipe, and the connection pipe may be provided with a plurality of liquid passages and an evaporation gas passage therein.
  • a regasification facility may be installed in the power plant, and a blow out preventer (BOP) may be installed in the submersible storage tank.
  • BOP blow out preventer
  • a ballast water pump may be installed in the submersible storage tank, and the power plant and the storage tank may be separately transported and installed.
  • LNG loading may be performed between the submersible storage tank and the LNG bunkering vessel in water irrespective of the power plant.
  • the submersible storage tank is a tank body consisting of a multi-bulk wall structure; A ballast water tank formed between the multiple partition walls; And it may include a concrete tank formed between the multiple partition walls.
  • the power plant is provided with a jack-up unit, the jack-up unit is installed vertically to the bottom of the sea, it may be installed to be up-down.
  • FIG. 1 is a perspective view showing a power plant system according to a first embodiment of the present invention
  • Figure 2 is a side view showing a power plant system according to a first embodiment of the present invention.
  • the power generation plant system to produce power by supplying LNG to the power plant 100 and the mooring system, the power plant 100 It includes a submersible storage tank 200 is installed on the seabed, and the connection pipe 300 for connecting the power plant 100 and the LNG storage tank 200.
  • the mooring system includes a conventional mooring apparatus, for example, the mooring apparatus disclosed in Japanese Patent Laid-Open Publication No. 10-2010-0114186 or Japanese Patent Laid-Open Publication No. 10-2010-0094126.
  • the power plant 100 includes a power generation module 120 capable of producing power using LNG as a fuel.
  • the power generation module 120 generates a waste heat recovery steam generator 122 that generates steam using waste heat of the exhaust gas generated in the gas turbine and / or engine power generation unit 121 and the gas turbine and / or engine power generation unit 121. ), And a steam turbine power generation unit 123 operating with steam supplied from the waste heat recovery steam generator 122, a transformer, a BOP device, a condenser unit, and the like, may be included.
  • the gas turbine and / or the engine power generation unit is defined as a concept including both a gas turbine and an engine for generating electricity using gas.
  • the power generation module is mounted on top of the power plant 100, but the power generation module may be installed inside the power plant 100 according to design conditions.
  • the power plant 100 may be provided with a regasification facility 130 for regasifying LNG to supply to the gas turbine and / or engine power generation unit 121 of the power generation module 120.
  • connection pipe 300 is used as a mobile passage such as LNG, and may have a structure in which a plurality of units are connected to each other or a structure in which a plurality of unit connection pipes 310 are connected.
  • a joint 320 for example, a swivel or a flexible joint, may be installed at a connection portion of the plurality of connection pipes 300 or at a connection portion of each unit connection pipe 310. By the joint 320, it is possible to effectively prevent the breakage of the connecting pipe 300 by a severe flow by the tidal flow.
  • connecting pipes may be connected using one or more connecting pipes, a connecting pipe may be installed in the duct, or the connecting pipe itself may be formed in a duct structure.
  • connection pipe 300 may have a plurality of passages built therein, and a liquid passage and an evaporation gas passage may be installed together in one line of the connection pipe 300 (not shown).
  • the submersible storage tank 200 includes a tank body 210 and a connection portion 230 formed in the tank body 210 to be connected to the connection pipe 300 extending from the power generation plant 100.
  • the submersible storage tank 200 may be used for storing a liquid cargo including a hydrocarbon component which is liquefied at cryogenic temperature, especially LNG.
  • a liquid cargo including a hydrocarbon component which is liquefied at cryogenic temperature, especially LNG.
  • Examples of the liquid cargo that can be stored in the submersible storage tank 200 include LPG, crude oil, refined oil, and the like, in addition to LNG.
  • the main cause of BOG is frictional heat due to sloshing and entropy increase due to external heat absorption. If BOR 0.1% / Day based on 135,000m3 tank is 57 Ton / Day (2.4 Ton / hour) Large amounts of LNG evaporate.
  • the submersible storage tank has no sloshing, so there is no frictional heat, and since the heat transmitted to the submersible storage tank 200 is significantly less than at sea, the amount of BOG is greatly reduced.
  • the submersible storage tank 200 stores LNG in a fixed state on the bottom of the sea, rocking caused by external force does not occur, so it is not necessary to form a chamfer and a hopper at the upper and lower edges of the storage tank (FIG. 3).
  • the storage space can be enlarged, and the installation cost can be reduced because there is no need to specially design the sealing and insulating barrier to form the inclined chamfer portion.
  • the chamfer and the hopper may be formed together or only one may be selectively formed according to the installation conditions of the installation region.
  • LNG stored in the submersible storage tank 200 is discharged from the submersible storage tank 200 through the pipe assembly 232 by the discharge pump 231.
  • LNG is supplied to the power generation plant 100 through the connection pipe 300.
  • the regasification facility 130 vaporizes LNG and supplies it to the power generation module 120.
  • the blow out preventer (BOP) installed at the connecting portion 230 serves to prevent the LNG from being ejected from the inside of the tank body 210.
  • the connection is performed.
  • the pipe passing through the inside of the BOP is cut and sealed in order to prevent the adverse influence of the pressure rise from the pipe 300 to the power plant 100.
  • the ballast water pump 233 supplies the ballast water to the ballast tank 220 in order to adjust the balancing of the submersible storage tank 200.
  • the boil-off gas generated in the submersible storage tank 200 may be supplied to the power plant 100 through the boil-off gas passage in the connection pipe 300, and may be supplied to the power generation module 120 without undergoing a regasification process.
  • the position of the power plant is fixed by the mooring system is not affected by the meteorological conditions of the sea can safely produce power in the power plant, there is no need for ballasting of the power plant.
  • the LNG supply can be supplied from the outside in order to reduce its own weight of the power plant, and since the submersible storage tank is separately installed on the sea floor, it is possible to stably produce power even in an area where gas is not available from the land.
  • the storage tank is safely installed on the sea floor, so that the environmental damage due to the storage tank is not damaged at all.
  • the power plant and the storage tank can be manufactured separately at the same time, it is possible to significantly shorten the air.
  • the lifting load is reduced since the power generation plant and the storage tank are transported and installed separately.
  • LNG can be supplied to various gas-related facilities such as FSRU or onshore LNG terminals as well as power plants in storage tanks installed on the seabed.
  • the present invention can be widely used in various gas-related fields because the storage tank can be moved.
  • FIG 3 is a longitudinal sectional view showing a submersible storage tank according to an embodiment of the present invention.
  • the submersible storage tank 200 includes a tank body 210 having a double wall structure formed by an inner wall 211 and an outer wall 212.
  • the submersible storage tank 200 includes a ballast tank 220 formed between the inner wall 211 and the outer wall 212 of the tank body 210.
  • the submersible storage tank 200 may be a standalone tank or a membrane tank having a sealed and insulated barrier 240 to store cryogenic liquid cargo such as LNG.
  • ballast tanks 220 may be formed between the inner wall 211 and the outer wall 212 of the tank body 210. Seawater may be used as the ballast water filled in the ballast tank 220.
  • connection portion 230 is formed outside the tank body 210, in particular, an upper portion of the tank body 210 so that the connection pipe 300 can be connected, the connection portion 230 including a liquid and / or gas dome, Can function as Shelter.
  • a pipe assembly 232 is installed inside the submersible storage tank 200 to extend near the bottom to discharge LNG.
  • the pipe assembly 232 may include a supply pipe used to supply LNG to the tank body 210, and a discharge pipe used to discharge LNG.
  • the supply pipe and the discharge pipe may be formed separately or may be formed as one.
  • connection portion 230 may include a blow out preventer (BOP) to prevent the LNG is ejected from the tank body 210.
  • BOP blow out preventer
  • the BOP passes a pipe passing through the inside of the BOP to prevent the adverse effect of the pressure rise from the connection pipe 300 to the power generation plant 100. It is a device for cutting and sealing.
  • connection unit 230 may include one or more ballast water pumps 233 for supplying and discharging the ballast water to the ballast tank 220.
  • the ballast water pump 233 may include a pump for supplying the ballast water and a pump for discharging the ballast water.
  • the pump for supplying the ballast water and the pump for discharging the ballast water may be provided separately, or may be configured to perform supply and discharge operations by one pump.
  • the submersible storage tank 200 may include upper and lower opening and closing valves 222 and 221 to supply the ballast water to the ballast tank 230.
  • the upper and lower open / close valves 222 and 221 may be installed at the lower and upper portions of the submersible storage tank 200, respectively.
  • the lower portion of the submersible storage tank 200 in which the lower on / off valve 221 is installed by its own weight Sea water may be introduced into the ballast tank 220 while being immersed in water.
  • the submersible storage tank 200 When the submersible storage tank 200 is installed on the seabed with the lower opening / closing valve 221 open, sand or the like of the seabed may flow into the ballast tank 220, and the submersible storage tank 200 When the upper opening / closing valve 222 is submerged in water, the lower opening / closing valve 221 is closed and the upper opening / closing valve 222 is opened to continuously supply the ballast water to the ballast tank 220.
  • a removable heavy material (not shown) to the outside of the submersible storage tank 200 to sink the empty submersible storage tank 200 to install on the seabed. It can also be attached.
  • the heavy material may be an auxiliary ballast tank capable of accommodating seawater or the like as ballast water therein, or may be a Gravity-Based Structure (GBS) made of concrete.
  • GGS Gravity-Based Structure
  • an auxiliary ballast tank may accommodate objects having a greater specific gravity than seawater, such as sand or stones.
  • the weight is preferably configured to be separated from the submersible storage tank 200, if necessary.
  • FIG. 4 is a longitudinal sectional view showing a submersible storage tank according to another embodiment of the present invention.
  • the submersible storage tank 400 includes a tank body 410 having a multiple partition structure, a ballast water tank 420 formed between the multiple partition walls 411, and It includes a concrete tank 430 formed between the multiple partition wall 411.
  • the ballast water tank 420 is configured to inject or discharge the ballast water
  • the concrete tank 430 is configured to be solidified after the concrete is injected.
  • the submersible storage tank 400 is firmly fixed to the sea bottom by the concrete, and the pressure resistance of the submersible storage tank itself may be improved.
  • the ballast water tank 420 and the concrete tank 430 are provided together, so that the submersible storage tank 400 is firm on the sea bottom by the load of the concrete.
  • the ballast water tank 420 may be filled with air to generate buoyancy, thereby facilitating the submerged storage tank.
  • ballast water pump for supplying and discharging the ballast water to the ballast tank 420
  • a discharge pump for discharging the LNG from the submersible storage tank 200
  • a pipe assembly may be installed to extend to the vicinity of the inner bottom of the submersible storage tank 200 to discharge LNG.
  • Figure 5 is a perspective view showing a jack-up power plant system according to a second embodiment of the present invention
  • Figure 6 is a side view showing a jack-up power plant system according to a second embodiment of the present invention.
  • a jack-up power plant system includes a jack-up power plant 1000 having a jack-up unit 1100 and a jack-up power plant 1000. It includes a submersible storage tank (2000) installed on the seabed to supply power to produce LNG, and a connection pipe (3000) connecting the jack-up power plant (1000) and the submersible storage tank (2000). .
  • the jack-up power generation plant 1000 includes a power generation module 1200 capable of producing electric power using LNG as a fuel.
  • the power generation module 1200 generates a waste heat recovery steam generator 1220 that generates steam by using waste heat of exhaust gas generated in the gas turbine and / or engine power generation unit 1210 and the gas turbine and / or engine power generation unit 1210. ), And a steam turbine power generation unit 1230, which is operated by steam supplied from the waste heat recovery steam generator 1220, a transformer, a BOP equipment, a condenser unit, and the like, may be included.
  • the power generation module is mounted on top of the jack-up power generation plant 1000, but the power generation module may be installed inside the jack-up power generation plant 1000 according to design conditions.
  • the jack-up power plant 1000 may be provided with a regasification facility 1300 for regasifying LNG to supply to the gas turbine and / or engine power generation unit 1210 of the power generation module 1200.
  • the jack up leg 1100 is disposed vertically with respect to the jack-up power plant 1000 and is installed up to the sea floor, and is installed to be up-down.
  • the up-down structure of the jack-up unit 1100 may be formed by a pinion structure engaged with the jack-up leg. Detailed description of the structure in which the pinion rotational motion is converted to the vertical motion of the jack-up leg will be omitted.
  • the submersible storage tank 2000 includes a connection portion 2300 formed in the tank body 2100 so that the tank body 2100 and a connection pipe 3000 extending from the jack-up power plant 1000 can be connected. .
  • the submersible storage tank 2000 may be used for storing a liquid cargo including a hydrocarbon component which is liquefied at cryogenic temperature, in particular, LNG.
  • a liquid cargo including a hydrocarbon component which is liquefied at cryogenic temperature, in particular, LNG.
  • Examples of the liquid cargo that can be stored in the submersible storage tank 2000 include LPG, crude oil, refined oil, and the like, in addition to LNG.
  • the chamfer (hopper) and the hopper may be formed together or only one selectively.
  • FIG. 7 is a side view showing a submersible storage tank installation structure of the power plant system according to the present invention.
  • a foundation plate 700 is installed on a sea bottom, and a center seating groove having a guide inclined surface 710 on the foundation plate 700. 720 is formed.
  • the mounting protrusion 610 may be formed.
  • the submersible storage tank 600 is installed on the foundation plate 700, so that the ground subsidence of the seabed surface. Due to this, it is possible to effectively prevent the inclination or flow of the submersible storage tank 600.
  • the submersible storage tank 600 it is very difficult to install the submersible storage tank 600 in the correct position because the flow of the flow rate is fast in the seabed, the submersible storage tank 600 on the foundation plate 700 in the submersible storage tank installation structure according to the present invention. Since it is installed, when the submersible storage tank 600 is installed, the center seating projection 610 is guided into the center seating groove 720 along the guide inclined surface 710 to install the submersible storage tank 600 in the correct position Is very easy.
  • a submersible storage tank on the inclined bottom surface may be installed a foundation plate 700 to fit the inclined bottom surface, but by installing an H-shape on the inclined portion of the inclined bottom surface
  • the foundation plate 700 may be configured not to tilt.
  • the present invention allows the supply of LNG to the power plant from the outside, but separately installs a submersible storage tank for storing LNG on the seabed to produce electricity stably in areas where gas supply is not possible from land. This is possible.
  • the present invention does not affect the power generation of the power plant at all because LNG loading is made between the storage tank and the LNG bunkering vessel in the water regardless of the power plant.
  • the present invention does not cause any environmental damage due to storage tank damage because the storage tank is safely installed on the sea floor even if the power plant is exposed to danger due to sudden bad weather.
  • the present invention can produce a power plant and a storage tank separately at the same time it is possible to significantly shorten the air.
  • the present invention reduces the lifting load (Lifting Load) because the transport and installation of the power plant and the storage tank separately.
  • the present invention can supply LNG to a variety of gas-related facilities, such as FSRU or land LNG terminal, as well as the power plant in the storage tank installed on the seabed.
  • the present invention can be widely used in various gas-related fields because the storage tank can be moved.
  • the present invention is designed so that the position of the power plant is fixed by the jack-up unit can safely produce power without being affected by the weather conditions of the sea.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

The present invention relates to a power plant system, and an installation structure of a submerged storage tank of the power plant system. Since liquefied natural gas (LNG) is externally supplied to a power plant, and a submerged storage tank is additionally installed under water, power can stably be produced even in a region to which gas cannot be supplied from land. In addition, since there is no sloshing in the storage tank, there is no frictional heat, and since the amount of heat transmitted to the submerged storage tank under water is significantly small compared to on the sea, the amount of boil-off gas (BOG) generated can be significantly reduced. Further, since LNG loading operations are conducted under water between the submerged storage tank and an LNG bunkering vessel, regardless of the power plant, the LNG loading operations do not affect the power generation of the power plant.

Description

발전플랜트 시스템, 그 발전플랜트 시스템의 잠수식 저장탱크, 및 그 잠수식 저장탱크 설치구조Power plant system, submersible storage tank of the power plant system, and the submersible storage tank installation structure
본 발명은 발전플랜트에 관한 것으로, 좀더 구체적으로는 전력을 생산하는 발전플랜트에 LNG 공급을 외부에서 하되, 육지로부터 가스공급이 불가능한 지역에서도 전력생산이 가능하도록 LNG를 저장하기 위한 잠수식의 저장탱크를 발전플랜트와는 별도로 해저에 설치하고 그 저장탱크로부터 발전 연료를 공급받을 수 있는 발전플랜트 시스템, 그 발전플랜트 시스템의 잠수식 저장탱크, 및 그 잠수식 저장탱크 설치구조에 관한 것이다.The present invention relates to a power plant, and more specifically, the LNG supply to the power plant to produce power from the outside, submersible storage tank for storing LNG so that power can be produced even in areas where gas is not available from the land The present invention relates to a power plant system which can be installed on the seabed separately from a power plant and receive power generation fuel from the storage tank, a submersible storage tank of the power plant system, and an installation structure of the submersible storage tank.
최근 친환경적인 발전에 대한 요구로 천연가스를 이용한 전력생산에 대한 관심이 증가하고 있다. 전력공급이 원활하지 않은 신흥개발국 등에서 가스 발전에 대한 관심이 높아지고 있는데, 가스 발전은 그 특성상 육지에 가스 저장소 등과 같은 가스 인프라가 갖추어져야만 전력생산이 가능하므로 개발에 제한이 많다.Recently, with the demand for environmentally friendly power generation, interest in power generation using natural gas is increasing. There is a growing interest in gas power generation in emerging economies, where power supply is not smooth. Gas power generation is limited in terms of development because power generation is possible only when a gas infrastructure such as gas storage is provided on land.
육상의 화력발전 플랜트는 용적이 너무 커서 설비 초기 설치비용이 상승하는 문제점이 있고, 설비 및 시스템이 별도의 건물에 독립적으로 위치함에 따라 건물 및 배관, 자재의 소모량이 증가하는 문제점이 있다.Onshore thermal power plants have a problem that the initial installation cost of the facility increases because the volume is too large, there is a problem that the consumption of buildings, piping, materials increases as the facilities and systems are independently located in a separate building.
또한, 종래 육상의 화력발전 플랜트에서는 설비 설치 및 탱크 배치, 그리고 테스트가 현장(site)에서 수행됨에 따라 리스크(risk)가 항상 존재하며, 오랜 공사기간이 필요한 문제점이 있다.In addition, in the conventional onshore thermal power plant, there is always a risk (risk) as the installation and tank arrangement, and the test is carried out on site (site), there is a problem that requires a long construction period.
특히, 여러 개의 섬들로 이루어진 동남아시아 국가의 경우에는 대용량의 가스 발전을 하는 데 어려움이 많았다. 즉, 육상의 화력발전소 건설에 따른 장소 확보와 건설비 소요를 가져오는 단점이 있으며, 육상의 화력발전소 건설에 많은 시간이 소요되므로 전력 공급을 단시간 내에 수행하는 것이 어렵다.In particular, in the case of Southeast Asian countries consisting of several islands, it was difficult to generate a large amount of gas. That is, there is a disadvantage in that it takes place to secure the place and the construction cost according to the construction of the thermal power plant on the land, and it is difficult to perform the power supply in a short time because the construction of the thermal power plant on the land takes a lot of time.
이와같은 문제점을 해결하기 위하여 발전 플랜트를 바지(barge)에 탑재하여 구성한 부유식 발전 플랜트(BMPP : Barge Mounted Power Plant)가 제안된바 있으며, 해상에서 액화천연가스를 저장하면서 그 액화천연가스 및 가스 터빈의 폐열을 이용하여 전력을 생산할 수 있는 부유 저장식 가스 발전플랜트(Floating and Storage Power Plant: FSPP)가 개발되고 있다.In order to solve such a problem, a Barge Mounted Power Plant (BMPP) has been proposed, which is constructed by mounting a power plant on a barge, while storing liquefied natural gas at sea, Floating and Storage Power Plants (FSPPs) are being developed that can generate electricity from turbine waste heat.
종래에는 전력부족 해소를 위해 발전소가 필요하지만 환경 파괴를 우려하는 지역 주민들의 반대로 부지 확보가 어렵고, 장기간의 우기와 취약한 물류 및 도로 인프라 등으로 인한 공기 지연이 예상되어 육상에 발전소를 건설하기가 어려운 낙후 지역의 내해나 강가에 부유식 발전플랜트를 띄운 후 계류(Mooring) 하여 전력을 생산하기도 한다.Conventionally, power plants are needed to solve power shortages, but it is difficult to secure land on the contrary of local residents who are concerned about environmental degradation, and it is difficult to build power plants on land due to long-term rain and air delays due to weak logistics and road infrastructure. Floating power plants are floated on inland seas and riversides, and moored to produce electricity.
부유식 발전플랜트는 안전한 발전을 위해서 수면이 잔잔하고 파도가 없어야 하는데, 이런 조건을 만족하는 곳을 찾는 것이 쉽지 않다. 따라서 보완책으로서 방파제를 만들고 특별한 계류방법을 적용해야 하는데, 건설비용이 상승하여 부유식 발전플랜트의 장점이 퇴색하는 문제가 있다.Floating power plants need to have calm water and no waves for safe development. It is not easy to find a place that meets these conditions. Therefore, as a complementary measure, a breakwater should be made and a special mooring method should be applied.
종래의 부유 저장식 가스 발전플랜트는, 저장탱크가 해상에 부유되므로 슬로싱(Sloshing)이 발생하고, 이로 인하여 마찰열이 발생하여 다량의 BOG(Boil Off Gas)가 발생하는 문제가 있고, 그 BOG 처리비용이 증가하는 문제가 있다.The conventional floating storage gas power plant has a problem that sloshing occurs because the storage tank is floated on the sea, and thus friction heat is generated to generate a large amount of BOG (Boil Off Gas), and the BOG treatment cost There is a growing problem.
전술한 문제점을 해결하기 위하여, 본 발명은 전력을 생산하는 발전플랜트에 LNG 공급을 외부에서 하되, 육지로부터 가스공급이 불가능한 지역에서도 전력생산이 가능하도록 LNG를 저장하기 위한 잠수식의 저장탱크를 발전플랜트와는 별도로 설치하고, 그 저장탱크로부터 발전 연료를 공급받을 수 있도록 함으로써, 육지로부터 가스공급이 불가능한 지역에서도 안정적으로 전력생산이 가능하고, 저장탱크의 슬로싱(Sloshing)이 없으므로 마찰열이 없고 수중에서 저장탱크로 전해지는 열이 해상보다 현저히 적으므로 BOG 발생량을 현저하게 감소시킬 수 있는 발전플랜트 시스템, 그 발전플랜트 시스템의 잠수식 저장탱크, 및 그 잠수식 저장탱크 설치구조를 제공함에 그 목적이 있다.In order to solve the above problems, the present invention is to supply the power plant to produce electricity from the outside, the generation of submersible storage tank for storing LNG to enable the power production even in areas where gas is not available from the land By installing it separately from the plant and allowing the fuel to be supplied from the storage tank, it is possible to produce electricity stably even in areas where gas cannot be supplied from the land, and there is no frictional heat because there is no sloshing of the storage tank. The purpose of the present invention is to provide a power plant system, a submersible storage tank of the power plant system, and a submersible storage tank installation structure, which can significantly reduce the amount of BOG generated since the heat transmitted to the storage tank is significantly lower than that of the sea. have.
전술한 목적을 달성하기 위하여, 본 발명은 발전모듈을 구비하는 발전플랜트; 상기 발전모듈에 LNG를 공급하여 전력을 생산할 수 있도록 해저에 설치되는 잠수식 저장탱크; 및 LNG 공급을 위해서 상기 발전플랜트와 상기 잠수식 저장탱크를 연결하는 연결파이프를 포함하는 발전플랜트 시스템을 제공한다.In order to achieve the above object, the present invention provides a power generation plant having a power generation module; Submersible storage tank is installed on the seabed to produce electricity by supplying LNG to the power generation module; And it provides a power plant system comprising a connection pipe for connecting the power plant and the submersible storage tank for LNG supply.
상기 잠수식 저장탱크는 내부 벽 및 외부 벽에 의해 이중벽 구조로 이루어지는 탱크 몸체; 상기 탱크 몸체의 내부 벽과 외부 벽 사이에 형성되는 밸러스트 탱크; 및 상기 연결파이프가 연결될 수 있도록 상기 탱크 몸체에 형성되는 연결부를 포함할 수 있다.The submersible storage tank includes a tank body having a double wall structure by an inner wall and an outer wall; A ballast tank formed between an inner wall and an outer wall of the tank body; And it may include a connecting portion formed in the tank body so that the connecting pipe can be connected.
상기 잠수식 저장탱크는 LNG의 배출을 위해 상기 잠수식 저장탱크의 내부 바닥까지 연장되는 파이프 조립체; 및 상기 파이프 조립체의 하단에 장착된 배출펌프를 포함할 수 있다.The submersible storage tank includes a pipe assembly extending to the inner bottom of the submersible storage tank for the discharge of LNG; And it may include a discharge pump mounted to the bottom of the pipe assembly.
상기 잠수식 저장탱크는 밸러스트 수를 상기 밸러스트 탱크의 내부에 공급하기 위한 상,하부 개폐밸브를 포함한다.The submersible storage tank includes upper and lower open / close valves for supplying ballast water into the ballast tank.
상기 연결부는 액체 및/또는 가스 돔을 포함하고, 상기 연결파이프는 다수의 단위 연결파이프들로 연결될 수 있다.The connection part may include a liquid and / or gas dome, and the connection pipe may be connected to a plurality of unit connection pipes.
상기 단위 연결파이프의 연결부위에는 조인트가 설치되고, 상기 연결파이프는 내부에 액체통로와 증발가스통로가 복수 개 설치될 수 있다.A joint is installed at the connection portion of the unit connection pipe, and the connection pipe may be provided with a plurality of liquid passages and an evaporation gas passage therein.
상기 발전플랜트에는 재기화설비가 설치되고, 상기 잠수식 저장탱크에는 BOP(Blow Out Preventer)가 설치될 수 있다.A regasification facility may be installed in the power plant, and a blow out preventer (BOP) may be installed in the submersible storage tank.
상기 잠수식 저장탱크에는 밸러스트 수 펌프가 설치될 수 있고, 상기 발전플랜트와 상기 저장탱크는 따로 운반(Transportation) 및 설치(Installation)될 수 있다.A ballast water pump may be installed in the submersible storage tank, and the power plant and the storage tank may be separately transported and installed.
상기 잠수식 저장탱크의 슬로싱(Sloshing)이 없으므로 마찰열이 없고 수중에서 상기 잠수식 저장탱크로 전해지는 열이 해상보다 적어서 BOG 발생량이 감소될 수 있다.Since there is no sloshing of the submersible storage tank, there is no frictional heat, and the heat transmitted to the submersible storage tank in water is less than that of the sea, thereby reducing the amount of BOG generated.
LNG 로딩(Loading)은 상기 발전플랜트와는 상관없이 수중에서 상기 잠수식 저장탱크와 LNG 벙커링 선박(Bunkering Vessel) 사이에서 이루어질 수 있다.LNG loading may be performed between the submersible storage tank and the LNG bunkering vessel in water irrespective of the power plant.
상기 잠수식 저장탱크는 다중 격벽 구조로 이루어지는 탱크 몸체; 상기 다중 격벽 사이에 형성되는 밸러스트 수 탱크; 및 상기 다중 격벽 사이에 형성되는 콘크리트 탱크를 포함할 수 있다.The submersible storage tank is a tank body consisting of a multi-bulk wall structure; A ballast water tank formed between the multiple partition walls; And it may include a concrete tank formed between the multiple partition walls.
상기 발전플랜트는 잭업 유닛을 구비하며, 상기 잭업 유닛은 수직으로 해저 면까지 설치되고, 업다운 가능하게 설치될 수 있다.The power plant includes a jack up unit, and the jack up unit may be installed vertically up to the bottom of the sea, and installed up-down.
한편, 본 발명은 전력을 생산하기 위한 발전모듈을 구비하는 발전플랜트에 LNG 공급을 위해서 해저에 설치되며, 연결파이프를 통해서 상기 발전플랜트에 연결되는 발전플랜트 시스템의 잠수식 저장탱크를 제공한다.On the other hand, the present invention is installed on the seabed for supplying LNG to the power plant having a power generation module for producing power, and provides a submersible storage tank of the power plant system connected to the power plant through a connecting pipe.
또 한편, 본 발명은 해저 면에 파운데이션 플레이트가 설치되고, 상기 파운데이션 플레이트의 상부에 안내 경사면을 갖는 센터 안착 홈이 형성되며, 상기 잠수식 저장탱크가 상기 파운데이션 플레이트 위에 결합되도록 상기 잠수식 저장탱크의 바닥면에 상기 안내 경사면에 의해 가이되 되면서 상기 센터 안착 홈 안에 삽입되는 센터 안착 돌기가 형성된 발전플랜트 시스템의 잠수식 저장탱크 설치구조를 제공한다.On the other hand, the present invention is a foundation plate is installed on the seabed surface, the center seating groove having a guide inclined surface is formed on the top of the foundation plate, the submersible storage tank of the submersible storage tank to be coupled to the foundation plate Provided by the guide inclined surface on the bottom surface provides a submersible storage tank installation structure of the power plant system is formed with a center seating projection is inserted into the center seating groove.
이상에서 설명한 바와 같이, 본 발명은 발전플랜트에 LNG 공급을 외부에서 할 수 있도록 하되, LNG를 저장하기 위한 잠수식의 저장탱크를 발전플랜트와는 별도로 해저에 설치하므로, 육지로부터 가스 공급이 불가능한 지역에서도 안정적으로 전력생산이 가능하다.As described above, the present invention allows the supply of LNG to the power plant from the outside, but since the submersible storage tank for storing LNG is installed on the seabed separately from the power plant, it is impossible to supply gas from land It is possible to produce power stably even at.
또한, 본 발명은 저장탱크의 슬로싱(Sloshing)이 없으므로 마찰열이 없고 수중에서 저장탱크로 전해지는 열이 해상보다 현저히 적으므로 BOG 발생량을 현저하게 감소시킬 수 있다.In addition, in the present invention, since there is no sloshing of the storage tank, there is no frictional heat, and heat transmitted to the storage tank in water is significantly smaller than at sea, thereby reducing the amount of BOG generated.
또한, 본 발명에서는 LNG 로딩(Loading)이 발전플랜트와는 상관없이 수중에서 LNG를 저장하는 저장탱크와 LNG를 공급하는 LNG 벙커링 선박(Bunkering Vessel) 사이에서 이루어지기 때문에, 발전플랜트의 전력생산에 전혀 영향을 주지 않는다.In addition, in the present invention, since LNG loading is performed between a storage tank for storing LNG underwater and an LNG bunkering vessel for supplying LNG, irrespective of a power generation plant, the LNG plant is completely produced in power generation of the power plant. Does not affect
또한, 본 발명은 갑작스런 기상악화로 발전플랜트가 위험에 노출되더라도 저장탱크는 해저에 안전하게 설치되므로, 저장탱크 파손으로 인한 환경피해가 전혀 없다.In addition, the present invention is because the storage tank is safely installed on the sea floor even if the power plant is exposed to danger due to sudden bad weather, there is no environmental damage due to storage tank damage.
또한, 본 발명은 발전플랜트와 저장탱크를 각각 따로 동시에 제작할 수 있기 때문에 획기적인 공기 단축이 가능하다.In addition, the present invention can produce a power plant and a storage tank separately at the same time, it is possible to significantly shorten the air.
또한, 본 발명은 발전플랜트와 저장탱크를 각각 따로 운반(Transportation)하고, 설치(Installation) 하기 때문에 리프팅 로드(Lifting Load)가 줄어든다.In addition, the present invention reduces the lifting load (Lifting Load) because the transport and installation of the power plant and the storage tank separately, respectively (Installation).
또한, 본 발명은 해저에 설치된 저장탱크에서 발전플랜트뿐만 아니라 FSRU 또는 육상 LNG 터미널 등 다양한 가스 관련 설비로도 LNG 공급이 가능하다.In addition, the present invention can supply LNG to a variety of gas-related facilities, such as FSRU or land LNG terminal, as well as the power plant in the storage tank installed on the seabed.
또한, 본 발명은 저장탱크의 이동이 가능하므로 다양한 가스 관련 분야에서 널리 사용 가능하다.In addition, the present invention can be widely used in various gas-related fields because the storage tank can be moved.
또한, 본 발명은 잭업 유닛에 의해서 발전플랜트의 위치가 고정되도록 설계하여 해상의 기상상태에 영향을 받지 않고 안전하게 전력을 생산할 수 있다.In addition, the present invention is designed so that the position of the power plant is fixed by the jack-up unit can safely produce power without being affected by the weather conditions of the sea.
도 1은 본 발명의 제1 실시 예에 따른 발전플랜트 시스템을 보인 사시도1 is a perspective view showing a power plant system according to a first embodiment of the present invention
도 2는 본 발명의 제1 실시 예에 따른 발전플랜트 시스템을 보인 측면도Figure 2 is a side view showing a power plant system according to a first embodiment of the present invention
도 3은 본 발명의 일 예에 따른 잠수식 저장탱크를 보인 종단면도Figure 3 is a longitudinal sectional view showing a submersible storage tank according to an embodiment of the present invention
도 4는 본 발명의 다른 예에 따른 잠수식 저장탱크를 보인 종단면도Figure 4 is a longitudinal sectional view showing a submersible storage tank according to another embodiment of the present invention
도 5는 본 발명의 제2 실시 예에 따른 발전플랜트 시스템을 보인 사시도5 is a perspective view showing a power plant system according to a second embodiment of the present invention
도 6은 본 발명의 제2 실시 예에 따른 발전플랜트 시스템을 보인 측면도Figure 6 is a side view showing a power plant system according to a second embodiment of the present invention
도 7은 본 발명에 잠수식 저장탱크 설치구조를 보인 종단면도Figure 7 is a longitudinal sectional view showing a submersible storage tank installation structure in the present invention
본 발명은 발전모듈을 구비하는 발전플랜트; 상기 발전모듈에 LNG를 공급하여 전력을 생산할 수 있도록 해저에 설치되는 잠수식 저장탱크; 및 LNG 공급을 위해서 상기 발전플랜트와 상기 잠수식 저장탱크를 연결하는 연결파이프를 포함하는 발전플랜트 시스템을 제공한다.The present invention provides a power generation plant having a power generation module; Submersible storage tank is installed on the seabed to produce electricity by supplying LNG to the power generation module; And it provides a power plant system comprising a connection pipe for connecting the power plant and the submersible storage tank for LNG supply.
상기 잠수식 저장탱크는 내부 벽 및 외부 벽에 의해 이중벽 구조로 이루어지는 탱크 몸체; 상기 탱크 몸체의 내부 벽과 외부 벽 사이에 형성되는 밸러스트 탱크; 및 상기 연결파이프가 연결될 수 있도록 상기 탱크 몸체에 형성되는 연결부를 포함할 수 있다.The submersible storage tank includes a tank body having a double wall structure by an inner wall and an outer wall; A ballast tank formed between an inner wall and an outer wall of the tank body; And it may include a connecting portion formed in the tank body so that the connecting pipe can be connected.
상기 잠수식 저장탱크는 LNG의 배출을 위해 상기 잠수식 저장탱크의 내부 바닥까지 연장되는 파이프 조립체; 및 상기 파이프 조립체의 하단에 장착된 배출펌프를 포함할 수 있다.The submersible storage tank includes a pipe assembly extending to the inner bottom of the submersible storage tank for the discharge of LNG; And it may include a discharge pump mounted to the bottom of the pipe assembly.
상기 잠수식 저장탱크는 밸러스트 수를 상기 밸러스트 탱크의 내부에 공급하기 위한 상,하부 개폐밸브를 포함할 수 있다.The submersible storage tank may include upper and lower opening and closing valves for supplying ballast water to the inside of the ballast tank.
상기 연결부는 액체 및/또는 가스 돔을 포함하고, 상기 연결파이프는 다수의 단위 연결파이프들로 연결될 수 있다.The connection part may include a liquid and / or gas dome, and the connection pipe may be connected to a plurality of unit connection pipes.
상기 단위 연결파이프의 연결부위에는 조인트가 설치되고, 상기 연결파이프는 내부에 액체통로와 증발가스통로가 복수 개 설치될 수 있다.A joint is installed at the connection portion of the unit connection pipe, and the connection pipe may be provided with a plurality of liquid passages and an evaporation gas passage therein.
상기 발전플랜트에는 재기화설비가 설치되고, 상기 잠수식 저장탱크에는 BOP(Blow Out Preventer)가 설치될 수 있다.A regasification facility may be installed in the power plant, and a blow out preventer (BOP) may be installed in the submersible storage tank.
상기 잠수식 저장탱크에는 밸러스트 수 펌프가 설치될 수 있고, 상기 발전플랜트와 상기 저장탱크는 각각 따로 운반(Transportation) 및 설치(Installation)될 수 있다.A ballast water pump may be installed in the submersible storage tank, and the power plant and the storage tank may be separately transported and installed.
상기 잠수식 저장탱크의 슬로싱(Sloshing)이 없으므로 마찰열이 없고 수중에서 상기 잠수식 저장탱크로 전해지는 열이 해상보다 적어서 BOG 발생량이 감소될 수 있다.Since there is no sloshing of the submersible storage tank, there is no frictional heat, and the heat transmitted to the submersible storage tank in water is less than that of the sea, thereby reducing the amount of BOG generated.
LNG 로딩(Loading)은 상기 발전플랜트와는 상관없이 수중에서 상기 잠수식 저장탱크와 LNG 벙커링 선박(Bunkering Vessel) 사이에서 이루어질 수 있다.LNG loading may be performed between the submersible storage tank and the LNG bunkering vessel in water irrespective of the power plant.
상기 잠수식 저장탱크는 다중 격벽 구조로 이루어지는 탱크 몸체; 상기 다중 격벽 사이에 형성되는 밸러스트 수 탱크; 및 상기 다중 격벽 사이에 형성되는 콘크리트 탱크를 포함할 수 있다.The submersible storage tank is a tank body consisting of a multi-bulk wall structure; A ballast water tank formed between the multiple partition walls; And it may include a concrete tank formed between the multiple partition walls.
한편, 상기 발전플랜트는 잭업 유닛을 구비하며, 상기 잭업 유닛은 수직으로 해저 면까지 설치되고, 업다운 가능하게 설치될 수 있다.On the other hand, the power plant is provided with a jack-up unit, the jack-up unit is installed vertically to the bottom of the sea, it may be installed to be up-down.
이하, 첨부 도면을 참조하여 본 발명의 바람직한 실시 예에 따른 발전플랜트 시스템 및 그 발전플랜트 시스템의 잠수식 저장탱크 설치구조에 대하여 상세하게 설명한다.Hereinafter, with reference to the accompanying drawings will be described in detail with respect to the power plant system and the submersible storage tank installation structure of the power plant system according to an embodiment of the present invention.
도 1은 본 발명의 제1 실시 예에 따른 발전플랜트 시스템을 보인 사시도이고, 도 2는 본 발명의 제1 실시 예에 따른 발전플랜트 시스템을 보인 측면도이다.1 is a perspective view showing a power plant system according to a first embodiment of the present invention, Figure 2 is a side view showing a power plant system according to a first embodiment of the present invention.
도 1 및 도 2를 참조하면, 본 발명의 제1 실시 예에 따른 발전플랜트 시스템은 계류시스템을 구비하는 발전플랜트(100)와, 상기 발전플랜트(100)에 LNG를 공급하여 전력을 생산할 수 있도록 해저에 설치되는 잠수식 저장탱크(200)와, 상기 발전플랜트(100)와 상기 LNG 저장탱크(200)를 연결하는 연결파이프(300)를 포함한다. 상기 계류시스템이란 통상의 계류장치, 예를 들어 공개특허공보 제10-2010-0114186호, 또는 공개특허공보 제10-2010-0094126호 등에 개시된 계류장치를 포함한다.1 and 2, the power generation plant system according to the first embodiment of the present invention to produce power by supplying LNG to the power plant 100 and the mooring system, the power plant 100 It includes a submersible storage tank 200 is installed on the seabed, and the connection pipe 300 for connecting the power plant 100 and the LNG storage tank 200. The mooring system includes a conventional mooring apparatus, for example, the mooring apparatus disclosed in Japanese Patent Laid-Open Publication No. 10-2010-0114186 or Japanese Patent Laid-Open Publication No. 10-2010-0094126.
상기 발전플랜트(100)는 LNG를 연료로 하여 전력을 생산할 수 있는 발전모듈(120)을 구비한다.The power plant 100 includes a power generation module 120 capable of producing power using LNG as a fuel.
발전모듈(120)은 가스 터빈 및/또는 엔진 발전유닛(121), 상기 가스 터빈 및/또는 엔진 발전유닛(121)에서 발생하는 배기가스의 폐열을 이용하여 스팀을 생성하는 폐열회수 스팀발생기(122), 상기 폐열회수 스팀발생기(122)에서 공급하는 스팀으로 작동하는 스팀 터빈 발전유닛(123), 도시하지 않은 트랜스포머, BOP 장비, 콘덴서유닛 등을 포함할 수 있다. 여기서, 가스 터빈 및/또는 엔진 발전유닛이란 가스를 이용하여 전기를 생산하는 가스터빈과 엔진 등을 모두를 포함하는 개념으로 정의한다.The power generation module 120 generates a waste heat recovery steam generator 122 that generates steam using waste heat of the exhaust gas generated in the gas turbine and / or engine power generation unit 121 and the gas turbine and / or engine power generation unit 121. ), And a steam turbine power generation unit 123 operating with steam supplied from the waste heat recovery steam generator 122, a transformer, a BOP device, a condenser unit, and the like, may be included. Here, the gas turbine and / or the engine power generation unit is defined as a concept including both a gas turbine and an engine for generating electricity using gas.
본 발명의 도면에는 발전모듈이 발전플랜트(100)의 상부에 탑재된 것만을 도시하였으나, 설계조건에 따라 발전모듈이 발전플랜트(100)의 내부에 설치될 수도 있다.In the drawings of the present invention, only the power generation module is mounted on top of the power plant 100, but the power generation module may be installed inside the power plant 100 according to design conditions.
상기 발전플랜트(100)에는 발전모듈(120)의 가스 터빈 및/또는 엔진 발전유닛(121)에 공급하기 위하여 LNG를 재기화시키는 재기화설비(130)가 설치될 수 있다.The power plant 100 may be provided with a regasification facility 130 for regasifying LNG to supply to the gas turbine and / or engine power generation unit 121 of the power generation module 120.
상기 연결파이프(300)는 LNG 등의 이동통로로 사용되는 것으로, 복수 개가 서로 연결되는 구조 혹은 다수의 단위 연결파이프들(310)이 연결되는 구조일 수 있다. 복수 개의 상기 연결파이프(300)의 연결부위 혹은, 각 단위 연결파이프들(310)의 연결부위에는 조인트(320), 예를 들어 스위블 혹은 플렉서블 조인트가 설치될 수 있다. 상기 조인트(320)에 의해서, 조류 등에 의한 심한 유동에 의해서 상기 연결파이프(300)의 파손을 효과적으로 방지할 수 있다.The connection pipe 300 is used as a mobile passage such as LNG, and may have a structure in which a plurality of units are connected to each other or a structure in which a plurality of unit connection pipes 310 are connected. A joint 320, for example, a swivel or a flexible joint, may be installed at a connection portion of the plurality of connection pipes 300 or at a connection portion of each unit connection pipe 310. By the joint 320, it is possible to effectively prevent the breakage of the connecting pipe 300 by a severe flow by the tidal flow.
또한, 도면에는 한 줄의 연결파이프만을 예시하고 있지만, 한 줄 이상의 연결파이프들을 이용하여 연결할 수도 있으며, 연결 파이프를 덕트 안에 설치할 수도 있고, 연결파이프 자체를 덕트 구조로 형성할 수도 있다.In addition, although only one row of connecting pipes is illustrated in the drawing, it may be connected using one or more connecting pipes, a connecting pipe may be installed in the duct, or the connecting pipe itself may be formed in a duct structure.
또한, 연결파이프(300)는 내부에 복수의 통로가 내장되어 있을 수도 있는데, 한 줄의 연결파이프(300) 내에는 액체통로와 증발가스통로가 함께 설치될 수도 있다(미도시).In addition, the connection pipe 300 may have a plurality of passages built therein, and a liquid passage and an evaporation gas passage may be installed together in one line of the connection pipe 300 (not shown).
상기 잠수식 저장탱크(200)는 탱크 몸체(210)와, 발전플랜트(100)로부터 연장하는 연결 파이프(300)가 연결될 수 있도록 탱크 몸체(210)에 형성되는 연결부(230)를 포함한다.The submersible storage tank 200 includes a tank body 210 and a connection portion 230 formed in the tank body 210 to be connected to the connection pipe 300 extending from the power generation plant 100.
잠수식 저장탱크(200)는 특히, LNG와 같이 극저온에서 액화되는 탄화수소성분을 포함하는 액체화물을 저장하기 위해 사용될 수 있다. 잠수식 저장탱크(200)에 저장될 수 있는 액체화물로는, LNG 이외에도, LPG, 원유, 정제유 등을 들 수 있다.The submersible storage tank 200 may be used for storing a liquid cargo including a hydrocarbon component which is liquefied at cryogenic temperature, especially LNG. Examples of the liquid cargo that can be stored in the submersible storage tank 200 include LPG, crude oil, refined oil, and the like, in addition to LNG.
참고로, BOG 발생 원인은 슬로싱(Sloshing)에 의한 마찰열과 외부 열 흡수에 의한 엔트로피 증가가 주원인이며, 135,000㎥ Tank 기준으로 BOR 0.1%/Day라면 57 Ton/Day(2.4 Ton/hour)나 되는 많은 양의 LNG가 증발한다. 본 발명에서 잠수식 저장탱크는 슬로싱이 없으므로 마찰열이 없고 수중에서는 잠수식 저장탱크(200)로 전해지는 열이 해상보다 현저히 적으므로 BOG 발생량이 대폭 감소한다.For reference, the main cause of BOG is frictional heat due to sloshing and entropy increase due to external heat absorption. If BOR 0.1% / Day based on 135,000㎥ tank is 57 Ton / Day (2.4 Ton / hour) Large amounts of LNG evaporate. In the present invention, the submersible storage tank has no sloshing, so there is no frictional heat, and since the heat transmitted to the submersible storage tank 200 is significantly less than at sea, the amount of BOG is greatly reduced.
이와같이 해저 면에 설치되는 잠수식 저장탱크(200)에서는 슬로싱 현상이 발생하지 않으므로, 상대적으로 저렴한 멤브레인형 탱크 구조를 사용하면 제조비용을 절감할 수 있어 유리하다.In this way, since the sloshing phenomenon does not occur in the submersible storage tank 200 installed on the sea bottom, a relatively inexpensive membrane type tank structure can be used to reduce the manufacturing cost.
상기 잠수식 저장탱크(200)는 해저 면에 고정된 상태에서 LNG를 저장하므로, 외력에 의한 요동이 발생하지 않아 저장탱크의 상,하부 모서리에 챔퍼(chamfer) 및 호퍼를 형성하지 않아도 된다(도 3 참조). 그에 따라 저장공간을 확대할 수 있고, 경사진 챔퍼 부분을 형성하기 위해 밀봉 및 단열 방벽을 특별하게 설계할 필요가 없으므로, 설치비용을 절감할 수 있다. 또한, 설치지역의 설치조건에 따라 챔퍼(chamfer) 및 호퍼를 함께 형성하거나 하나만을 선택적으로 형성할 수도 있다.Since the submersible storage tank 200 stores LNG in a fixed state on the bottom of the sea, rocking caused by external force does not occur, so it is not necessary to form a chamfer and a hopper at the upper and lower edges of the storage tank (FIG. 3). As a result, the storage space can be enlarged, and the installation cost can be reduced because there is no need to specially design the sealing and insulating barrier to form the inclined chamfer portion. In addition, the chamfer and the hopper may be formed together or only one may be selectively formed according to the installation conditions of the installation region.
이와같이 구성된 본 발명의 제1 실시 예에 따른 발전플랜트 시스템은, 잠수식 저장탱크(200)에 저장된 LNG는 배출펌프(231)에 의해서 파이프 조립체(232)를 통해서 잠수식 저장탱크(200)로부터 배출되며, LNG는 상기 연결파이프(300)를 통해서 발전플랜트(100)에 공급된다. 재기화설비(130)는 LNG를 기화시켜서 발전모듈(120)에 공급한다.In the power plant system according to the first embodiment of the present invention configured as described above, LNG stored in the submersible storage tank 200 is discharged from the submersible storage tank 200 through the pipe assembly 232 by the discharge pump 231. LNG is supplied to the power generation plant 100 through the connection pipe 300. The regasification facility 130 vaporizes LNG and supplies it to the power generation module 120.
연결부(230)에 설치된 BOP(Blow Out Preventer)는 탱크 몸체(210) 내부에서 LNG가 분출되는 것을 방지하는 역할을 하는 것으로, 탱크 몸체(210) 내부의 압력이 급격히 상승하는 비상 상황 발생 시, 연결파이프(300)를 통해 발전플랜트(100)까지 압력상승의 악영향이 전달되는 것을 방지하기 위해 BOP의 내부를 통과하는 파이프를 절단하고 밀봉한다.The blow out preventer (BOP) installed at the connecting portion 230 serves to prevent the LNG from being ejected from the inside of the tank body 210. In case of an emergency situation in which the pressure inside the tank body 210 rises rapidly, the connection is performed. The pipe passing through the inside of the BOP is cut and sealed in order to prevent the adverse influence of the pressure rise from the pipe 300 to the power plant 100.
잠수식 저장탱크(200)에 저장된 LNG의 배출시, 잠수식 저장탱크(200)의 밸런싱을 조절하기 위하여 밸러스트 수 펌프(233)는 밸러스트 탱크(220)에 밸러스트 수를 공급한다.When the LNG stored in the submersible storage tank 200 is discharged, the ballast water pump 233 supplies the ballast water to the ballast tank 220 in order to adjust the balancing of the submersible storage tank 200.
잠수식 저장탱크(200)에서 발생하는 증발가스는 연결파이프(300) 내의 증발가스 통로를 통해서 발전플랜트(100)에 공급되고, 재기화 과정을 거치지 않고 발전모듈(120)에 공급될 수 있다.The boil-off gas generated in the submersible storage tank 200 may be supplied to the power plant 100 through the boil-off gas passage in the connection pipe 300, and may be supplied to the power generation module 120 without undergoing a regasification process.
본 발명에서는 계류 시스템에 의해서 발전플랜트의 위치가 고정되도록 설계하여 해상의 기상 상태에 영향을 받지 않게 되어 발전플랜트에서 안전하게 전력을 생산할 수 있으며, 발전플랜트의 밸러스팅이 필요 없다.In the present invention, the position of the power plant is fixed by the mooring system is not affected by the meteorological conditions of the sea can safely produce power in the power plant, there is no need for ballasting of the power plant.
본 발명에서는 발전플랜트의 자체무게를 줄이기 위하여 LNG 공급을 외부에서 할 수 있도록 하되, 별도로 해저에 잠수식의 저장탱크를 설치하므로 육지로부터 가스 공급이 불가한 지역에서도 안정적으로 전력생산이 가능하다.In the present invention, the LNG supply can be supplied from the outside in order to reduce its own weight of the power plant, and since the submersible storage tank is separately installed on the sea floor, it is possible to stably produce power even in an area where gas is not available from the land.
본 발명에서는 저장탱크의 슬로싱(Sloshing)이 없으므로 마찰열이 없고 수중에서 저장탱크로 전해지는 열이 해상보다 현저히 적으므로 BOG 발생량을 현저하게 감소시킬 수 있다.In the present invention, since there is no sloshing of the storage tank, there is no frictional heat and heat transmitted to the storage tank in water is significantly smaller than at sea so that the amount of BOG can be significantly reduced.
본 발명에서는 LNG 로딩(Loading)이 발전플랜트(Floating BMPP) 본선과는 상관없이 수중에서 저장탱크와 LNG Bunkering Vessel 사이에서 이루어지기 때문에 발전플랜트의 전력 생산에 전혀 영향을 주지 않는다.In the present invention, since LNG loading is performed between the storage tank and the LNG Bunkering Vessel underwater, regardless of the Floating BMPP ship, it does not affect the power generation of the power plant at all.
본 발명에서는 갑작스런 기상악화로 발전플랜트가 위험에 노출되더라도 저장탱크는 해저에 안전하게 설치되므로 저장탱크 파손으로 인한 환경피해를 전혀 주지 않는다.In the present invention, even if the power plant is exposed to danger due to sudden bad weather, the storage tank is safely installed on the sea floor, so that the environmental damage due to the storage tank is not damaged at all.
본 발명에서는 발전플랜트와 저장탱크를 따로 동시에 제작할 수 있기 때문에 획기적인 공기 단축이 가능하다.In the present invention, since the power plant and the storage tank can be manufactured separately at the same time, it is possible to significantly shorten the air.
본 발명에서는 발전플랜트와 저장탱크를 따로 운반(Transportation), 설치(Installation)하기 때문에 리프팅 로드(Lifting Load)가 줄어든다.In the present invention, the lifting load is reduced since the power generation plant and the storage tank are transported and installed separately.
본 발명에서는 해저에 설치된 저장탱크에서 발전플랜트뿐만 아니라 FSRU 또는 육상 LNG 터미널 등 다양한 가스 관련 설비로도 LNG 공급이 가능하다.In the present invention, LNG can be supplied to various gas-related facilities such as FSRU or onshore LNG terminals as well as power plants in storage tanks installed on the seabed.
또한, 본 발명은 저장탱크의 이동이 가능하므로 다양한 가스 관련 분야에서 널리 사용 가능하다.In addition, the present invention can be widely used in various gas-related fields because the storage tank can be moved.
이하에서는 잠수식 저장탱크에 대하여 구체적으로 설명한다.Hereinafter, the submersible storage tank will be described in detail.
도 3은 본 발명의 일예에 따른 잠수식 저장탱크를 보인 종단면도이다.3 is a longitudinal sectional view showing a submersible storage tank according to an embodiment of the present invention.
도 3을 참조하면, 본 발명의 일예에 따른 잠수식 저장탱크(200)는 내부 벽(211) 및 외부 벽(212)에 의한 이중 벽 구조로 이루어지는 탱크 몸체(210)를 포함한다. 잠수식 저장탱크(200)는 상기 탱크 몸체(210)의 내부 벽(211)과 외부 벽(212) 사이에 형성되는 밸러스트 탱크(220)를 포함한다.Referring to FIG. 3, the submersible storage tank 200 according to an embodiment of the present invention includes a tank body 210 having a double wall structure formed by an inner wall 211 and an outer wall 212. The submersible storage tank 200 includes a ballast tank 220 formed between the inner wall 211 and the outer wall 212 of the tank body 210.
상기 잠수식 저장탱크(200)는 LNG와 같은 극저온 액체화물을 저장할 수 있도록 밀봉 및 단열 방벽(240)을 갖는 독립형 탱크 또는 멤브레인형 탱크일 수 있다.The submersible storage tank 200 may be a standalone tank or a membrane tank having a sealed and insulated barrier 240 to store cryogenic liquid cargo such as LNG.
상기 탱크 몸체(210)의 내부 벽(211)과 외부 벽(212) 사이에는, 하나 이상의 밸러스트 탱크(220)가 형성될 수 있다. 밸러스트 탱크(220)에 채워지는 밸러스트 수로서는 해수가 사용될 수 있다.Between the inner wall 211 and the outer wall 212 of the tank body 210, one or more ballast tanks 220 may be formed. Seawater may be used as the ballast water filled in the ballast tank 220.
탱크 몸체(210)의 외부, 특히 탱크 몸체(210)의 상부에는 연결파이프(300)가 연결될 수 있도록 연결부(230)가 형성되는데, 상기 연결부(230)는 액체 및/또는 가스 돔을 포함하며, 보호장치(Shelter) 기능을 할 수 있다.A connection portion 230 is formed outside the tank body 210, in particular, an upper portion of the tank body 210 so that the connection pipe 300 can be connected, the connection portion 230 including a liquid and / or gas dome, Can function as Shelter.
상기 연결파이프(300:도 1 참조)가 연결될 수 있도록 탱크 몸체(210)의 상부에 형성되는 연결부(230)는, LNG를 잠수식 저장탱크(200)로부터 배출시키기 위한 배출펌프(231)를 포함할 수 있다.The connecting portion 230 formed on the upper portion of the tank body 210 so that the connecting pipe 300 (see FIG. 1) may be connected to a discharge pump 231 for discharging LNG from the submersible storage tank 200. can do.
LNG의 배출을 위해 잠수식 저장탱크(200) 내부에는 바닥 부근까지 연장하는 파이프 조립체(232)가 설치된다.A pipe assembly 232 is installed inside the submersible storage tank 200 to extend near the bottom to discharge LNG.
파이프 조립체(232)는 탱크 몸체(210)에 LNG를 공급할 때 사용하는 공급 파이프와, LNG를 배출할 때 사용하는 배출 파이프를 포함할 수 있다. 공급 파이프와 배출 파이프는 별개로 형성될 수도 있고, 하나로 형성될 수도 있다.The pipe assembly 232 may include a supply pipe used to supply LNG to the tank body 210, and a discharge pipe used to discharge LNG. The supply pipe and the discharge pipe may be formed separately or may be formed as one.
또한, 연결부(230)는 탱크 몸체(210) 내부에서 LNG가 분출되는 것을 방지하는 BOP(Blow Out Preventer)를 포함할 수 있다.In addition, the connection portion 230 may include a blow out preventer (BOP) to prevent the LNG is ejected from the tank body 210.
BOP는 탱크 몸체(210) 내부의 압력이 급격히 상승하는 비상 상황 발생시, 연결파이프(300)를 통해 발전플랜트(100)까지 압력상승의 악영향이 전달되는 것을 방지하기 위해 BOP의 내부를 통과하는 파이프를 절단하고 밀봉하는 장치이다.In case of an emergency situation in which the pressure inside the tank body 210 rapidly rises, the BOP passes a pipe passing through the inside of the BOP to prevent the adverse effect of the pressure rise from the connection pipe 300 to the power generation plant 100. It is a device for cutting and sealing.
또한, 연결부(230)는 밸러스트 탱크(220)에 밸러스트 수를 공급 및 배출시키기 위한 하나 이상의 밸러스트 수 펌프(233)를 포함할 수 있다.In addition, the connection unit 230 may include one or more ballast water pumps 233 for supplying and discharging the ballast water to the ballast tank 220.
밸러스트 수 펌프(233)는 밸러스트 수를 공급하기 위한 펌프와, 밸러스트 수를 배출하기 위한 펌프를 포함할 수 있다.The ballast water pump 233 may include a pump for supplying the ballast water and a pump for discharging the ballast water.
밸러스트 수를 공급하기 위한 펌프와 밸러스트 수를 배출하기 위한 펌프는 각각 별도로 마련될 수도 있고, 하나의 펌프에 의해 공급 및 배출작업을 수행하도록 구성될 수도 있다.The pump for supplying the ballast water and the pump for discharging the ballast water may be provided separately, or may be configured to perform supply and discharge operations by one pump.
상기 잠수식 저장탱크(200)는, 밸러스트 수를 밸러스트 탱크(230)의 내부에 공급하기 위해 상,하부 개폐밸브(222, 221)를 포함할 수 있다.The submersible storage tank 200 may include upper and lower opening and closing valves 222 and 221 to supply the ballast water to the ballast tank 230.
상,하부 개폐밸브(222, 221)는 잠수식 저장탱크(200)의 하부 및 상부에 각각 설치될 수 있다.The upper and lower open / close valves 222 and 221 may be installed at the lower and upper portions of the submersible storage tank 200, respectively.
하부 개폐밸브(221)를 개방시킨 상태에서, 크레인 등을 이용하여 잠수식 저장탱크(200)를 해상에 내려놓으면, 자중에 의해 하부 개폐밸브(221)가 설치된 잠수식 저장탱크(200)의 하부가 물에 잠기면서 밸러스트 탱크(220)에 해수가 유입될 수 있다.When the submersible storage tank 200 is lowered to the sea using a crane or the like while the lower on / off valve 221 is opened, the lower portion of the submersible storage tank 200 in which the lower on / off valve 221 is installed by its own weight Sea water may be introduced into the ballast tank 220 while being immersed in water.
하부 개폐밸브(221)가 개방된 상태로 잠수식 저장탱크(200)가 해저에 설치될 경우, 해저의 모래 등이 밸러스트 탱크(220)의 내부로 유입될 우려가 있으므로, 잠수식 저장탱크(200)가 하강하여 상부 개폐밸브(222)가 물에 잠기면 하부 개폐밸브(221)를 폐쇄하고 상부 개폐밸브(222)를 개방시켜 계속해서 밸러스트 탱크(220)에 밸러스트 수를 공급할 수 있다.When the submersible storage tank 200 is installed on the seabed with the lower opening / closing valve 221 open, sand or the like of the seabed may flow into the ballast tank 220, and the submersible storage tank 200 When the upper opening / closing valve 222 is submerged in water, the lower opening / closing valve 221 is closed and the upper opening / closing valve 222 is opened to continuously supply the ballast water to the ballast tank 220.
또한, 밸러스트 탱크(220)의 용량을 증가시키는 대신에, 비어 있는 잠수식 저장탱크(200)를 가라앉혀 해저에 설치하기 위해 탈부착 가능한 중량물(미도시)을 잠수식 저장탱크(200)의 외부에 부착시킬 수도 있다. 중량물은 내부에 밸러스트 수로서 해수 등을 수용할 수 있는 보조 밸러스트 탱크일 수도 있고, 콘크리트 등으로 제작된 GBS(Gravity-Based Structure)일 수도 있다. 보조 밸러스트 탱크에는 해수 이외에도 모래나 돌 등과 같이 해수보다 비중이 큰 물체가 수용될 수 있다.In addition, instead of increasing the capacity of the ballast tank 220, a removable heavy material (not shown) to the outside of the submersible storage tank 200 to sink the empty submersible storage tank 200 to install on the seabed. It can also be attached. The heavy material may be an auxiliary ballast tank capable of accommodating seawater or the like as ballast water therein, or may be a Gravity-Based Structure (GBS) made of concrete. In addition to seawater, an auxiliary ballast tank may accommodate objects having a greater specific gravity than seawater, such as sand or stones.
유지보수나 이동 재설치를 위해 잠수식 저장탱크(200)를 부상시킬 경우를 감안하여, 상기 중량물은 필요 시, 잠수식 저장탱크(200)로부터 분리될 수 있도록 구성되는 것이 바람직하다.In consideration of the case of floating the submersible storage tank 200 for maintenance or moving reinstallation, the weight is preferably configured to be separated from the submersible storage tank 200, if necessary.
또한 도 4는 본 발명의 다른 예에 따른 잠수식 저장탱크를 보인 종단면도이다.4 is a longitudinal sectional view showing a submersible storage tank according to another embodiment of the present invention.
도 4를 참조하면, 본 발명의 다른 예에 따른 잠수식 저장탱크(400)는 다중 격벽 구조로 이루어지는 탱크 몸체(410), 상기 다중 격벽(411) 사이에 형성되는 밸러스트 수 탱크(420), 및 상기 다중 격벽(411) 사이에 형성되는 콘크리트 탱크(430)를 포함한다. 상기 밸러스트 수 탱크(420) 안에는 밸러스트 수를 주입하거나 배출할 수 있도록 구성되며, 상기 콘크리트 탱크(430) 내부에는 콘크리트가 주입된 후 응고되도록 구성된다. 상기 콘크리트에 의해서 잠수식 저장탱크(400)는 해저면에 견고하게 고정되며, 잠수식 저장탱크 자체의 내압성이 향상될 수 있다.Referring to FIG. 4, the submersible storage tank 400 according to another embodiment of the present invention includes a tank body 410 having a multiple partition structure, a ballast water tank 420 formed between the multiple partition walls 411, and It includes a concrete tank 430 formed between the multiple partition wall 411. The ballast water tank 420 is configured to inject or discharge the ballast water, the concrete tank 430 is configured to be solidified after the concrete is injected. The submersible storage tank 400 is firmly fixed to the sea bottom by the concrete, and the pressure resistance of the submersible storage tank itself may be improved.
본 발명의 다른 예에 따른 잠수식 저장탱크(400)에서는 밸러스트 수 탱크(420)와 콘크리트 탱크(430)가 함께 구비됨으로써, 상기 콘크리트의 하중에 의해서 잠수식 저장탱크(400)는 해저 면에 견고하게 고정되며, 잠수식 저장탱크의 운반 혹은 이동시에는 밸러스트 수 탱크(420) 안에 공기를 채워서 부력을 발생시켜서 잠수식 저장탱크의 운반 혹은 이동을 용이하게 할 수 있다.In the submersible storage tank 400 according to another embodiment of the present invention, the ballast water tank 420 and the concrete tank 430 are provided together, so that the submersible storage tank 400 is firm on the sea bottom by the load of the concrete. When the submersible storage tank is transported or moved, the ballast water tank 420 may be filled with air to generate buoyancy, thereby facilitating the submerged storage tank.
또한, 도면에는 도시하지 않았으나, 밸러스트 탱크(420)에 밸러스트 수를 공급 및 배출시키기 위한 하나 이상의 밸러스트 수 펌프, LNG를 잠수식 저장탱크(200)로부터 배출시키기 위한 배출펌프, 상,하부 개폐밸브, LNG의 배출을 위해 잠수식 저장탱크(200) 내부 바닥 부근까지 연장하는 파이프 조립체 등이 설치될 수 있다.In addition, although not shown in the drawing, at least one ballast water pump for supplying and discharging the ballast water to the ballast tank 420, a discharge pump for discharging the LNG from the submersible storage tank 200, upper and lower valves, A pipe assembly may be installed to extend to the vicinity of the inner bottom of the submersible storage tank 200 to discharge LNG.
한편, 도 5는 본 발명의 제2 실시 예에 따른 잭업식 발전플랜트 시스템을 보인 사시도이고, 도 6은 본 발명의 제2 실시 예에 따른 잭업식 발전플랜트 시스템을 보인 측면도이다.On the other hand, Figure 5 is a perspective view showing a jack-up power plant system according to a second embodiment of the present invention, Figure 6 is a side view showing a jack-up power plant system according to a second embodiment of the present invention.
도 5 및 도 6을 참조하면, 본 발명의 제2 실시 예에 따른 잭업식 발전플랜트 시스템은 잭업 유닛(1100)을 구비하는 잭업식 발전플랜트(1000)와, 상기 잭업식 발전플랜트(1000)에 LNG를 공급하여 전력을 생산할 수 있도록 해저에 설치되는 잠수식 저장탱크(2000)와, 상기 잭업식 발전플랜트(1000)와 상기 잠수식 저장탱크(2000)를 연결하는 연결파이프(3000)를 포함한다.5 and 6, a jack-up power plant system according to a second embodiment of the present invention includes a jack-up power plant 1000 having a jack-up unit 1100 and a jack-up power plant 1000. It includes a submersible storage tank (2000) installed on the seabed to supply power to produce LNG, and a connection pipe (3000) connecting the jack-up power plant (1000) and the submersible storage tank (2000). .
상기 잭업식 발전플랜트(1000)는 LNG를 연료로 하여 전력을 생산할 수 있는 발전모듈(1200)을 구비한다.The jack-up power generation plant 1000 includes a power generation module 1200 capable of producing electric power using LNG as a fuel.
발전모듈(1200)은 가스 터빈 및/또는 엔진 발전유닛(1210), 상기 가스 터빈 및/또는 엔진 발전유닛(1210)에서 발생하는 배기가스의 폐열을 이용하여 스팀을 생성하는 폐열회수 스팀발생기(1220), 상기 폐열회수 스팀발생기(1220)에서 공급하는 스팀으로 작동하는 스팀 터빈 발전유닛(1230), 도시하지 않은 트랜스포머, BOP 장비, 콘덴서유닛 등을 포함할 수 있다. The power generation module 1200 generates a waste heat recovery steam generator 1220 that generates steam by using waste heat of exhaust gas generated in the gas turbine and / or engine power generation unit 1210 and the gas turbine and / or engine power generation unit 1210. ), And a steam turbine power generation unit 1230, which is operated by steam supplied from the waste heat recovery steam generator 1220, a transformer, a BOP equipment, a condenser unit, and the like, may be included.
본 발명의 도면에는 발전모듈이 잭업식 발전플랜트(1000)의 상부에 탑재된 것만을 도시하였으나, 설계조건에 따라 발전모듈이 잭업식 발전플랜트(1000)의 내부에 설치될 수도 있다.In the drawings of the present invention, only the power generation module is mounted on top of the jack-up power generation plant 1000, but the power generation module may be installed inside the jack-up power generation plant 1000 according to design conditions.
상기 잭업식 발전플랜트(1000)에는 발전모듈(1200)의 가스 터빈 및/또는 엔진 발전유닛(1210)에 공급하기 위하여 LNG를 재기화시키는 재기화설비(1300)가 설치될 수 있다.The jack-up power plant 1000 may be provided with a regasification facility 1300 for regasifying LNG to supply to the gas turbine and / or engine power generation unit 1210 of the power generation module 1200.
상기 잭업 유닛(Jack up Leg)(1100)은 잭업식 발전플랜트(1000)에 대하여 수직으로 배치되고 해저까지 설치되며, 업다운 가능하게 설치된다. 도면에 도시하지는 않았으나 상기 잭업 유닛(1100)의 업다운 구조는 잭업 레그에 치합되는 피니언 구조에 의해서 가능하다. 피니언의 회전운동이 잭업 레그의 수직 운동으로 전환되는 구조에 대한 구체적인 설명은 생략하기로 한다.The jack up leg 1100 is disposed vertically with respect to the jack-up power plant 1000 and is installed up to the sea floor, and is installed to be up-down. Although not shown in the drawings, the up-down structure of the jack-up unit 1100 may be formed by a pinion structure engaged with the jack-up leg. Detailed description of the structure in which the pinion rotational motion is converted to the vertical motion of the jack-up leg will be omitted.
상기 잠수식 저장탱크(2000)는 탱크 몸체(2100)와, 잭업식 발전플랜트(1000)로부터 연장하는 연결 파이프(3000)가 연결될 수 있도록 탱크 몸체(2100)에 형성되는 연결부(2300)를 포함한다.The submersible storage tank 2000 includes a connection portion 2300 formed in the tank body 2100 so that the tank body 2100 and a connection pipe 3000 extending from the jack-up power plant 1000 can be connected. .
잠수식 저장탱크(2000)는 특히, LNG와 같이 극저온에서 액화되는 탄화수소성분을 포함하는 액체화물을 저장하기 위해 사용될 수 있다. 잠수식 저장탱크(2000)에 저장될 수 있는 액체화물로는, LNG 이외에도, LPG, 원유, 정제유 등을 들 수 있다.The submersible storage tank 2000 may be used for storing a liquid cargo including a hydrocarbon component which is liquefied at cryogenic temperature, in particular, LNG. Examples of the liquid cargo that can be stored in the submersible storage tank 2000 include LPG, crude oil, refined oil, and the like, in addition to LNG.
이와 같이 해저에 설치되는 잠수식 저장탱크(2000)에서는 슬로싱 현상이 발생하지 않으므로, 상대적으로 저렴한 멤브레인형 탱크 구조를 사용하며 저장탱크의 상,하부 모서리에 챔퍼(chamfer) 및 호퍼를 형성하지 않아도 되며 밀봉 및 단열 방벽을 특별하게 설계할 필요가 없으므로, 제조비용을 절감할 수 있다. 또한, 설치 지역의 설치조건에 따라서는 챔퍼(chamfer) 및 호퍼를 함께 형성하거나 하나만을 선택적으로 형성할 수도 있다.In this way, since the sloshing phenomenon does not occur in the submersible storage tank 2000 installed on the sea floor, a relatively inexpensive membrane tank structure is used, and a chamfer and a hopper are not formed at the upper and lower edges of the storage tank. This eliminates the need for special design of sealing and insulating barriers, thereby reducing manufacturing costs. In addition, depending on the installation conditions of the installation area, the chamfer (hopper) and the hopper may be formed together or only one selectively.
도 7은 본 발명에 따른 발전플랜트 시스템의 잠수식 저장탱크 설치구조를 보인 측면도이다.7 is a side view showing a submersible storage tank installation structure of the power plant system according to the present invention.
도 7을 참조하면, 본 발명에 따른 잠수식 저장탱크 설치구조는, 해저 면에 파운데이션 플레이트(700)가 설치되고, 상기 파운데이션 플레이트(700)의 상부에 안내 경사면(710)을 갖는 센터 안착 홈(720)이 형성된다.Referring to FIG. 7, in the submersible storage tank installation structure according to the present invention, a foundation plate 700 is installed on a sea bottom, and a center seating groove having a guide inclined surface 710 on the foundation plate 700. 720 is formed.
잠수식 저장탱크(600)가 상기 파운데이션 플레이트(700) 위에 결합하도록 상기 잠수식 저장탱크(600)의 바닥면에는 상기 안내 경사면(710)에 의해 안내되면서 상기 센터 안착 홈(720) 안에 삽입되는 센터 안착 돌기(610)가 형성될 수 있다.A center inserted into the center seating groove 720 while being guided by the guide inclined surface 710 on the bottom surface of the submersible storage tank 600 so that the submersible storage tank 600 is coupled to the foundation plate 700. The mounting protrusion 610 may be formed.
이와 같이 구성된 본 발명에 따른 잠수식 저장탱크 설치구조에서는 파운데이션 플레이트(700)가 해저 면에 먼저 설치된 후, 파운데이션 플레이트(700) 위에 잠수식 저장탱크(600)가 설치되므로, 해저 면의 지반 침하로 인하여 잠수식 저장탱크(600)의 기울어짐이나 유동을 효과적으로 방지할 수 있다.In the submersible storage tank installation structure according to the present invention configured as described above, after the foundation plate 700 is first installed on the seabed surface, the submersible storage tank 600 is installed on the foundation plate 700, so that the ground subsidence of the seabed surface. Due to this, it is possible to effectively prevent the inclination or flow of the submersible storage tank 600.
또한, 해저에서는 유속의 흐름이 빨라서 잠수식 저장탱크(600)를 정확한 위치에 설치하기가 매우 어려운데, 본 발명에 따른 잠수식 저장탱크 설치구조에서는 파운데이션 플레이트(700) 위에 잠수식 저장탱크(600)가 설치되므로, 잠수식 저장탱크(600) 설치시, 센터 안착 돌기(610)가 안내 경사면(710)을 따라 센터 안착홈(720) 안으로 안내되므로 잠수식 저장탱크(600)를 정확한 위치에 설치하기가 매우 쉽다.In addition, it is very difficult to install the submersible storage tank 600 in the correct position because the flow of the flow rate is fast in the seabed, the submersible storage tank 600 on the foundation plate 700 in the submersible storage tank installation structure according to the present invention. Since it is installed, when the submersible storage tank 600 is installed, the center seating projection 610 is guided into the center seating groove 720 along the guide inclined surface 710 to install the submersible storage tank 600 in the correct position Is very easy.
또한 도면에는 도시하지 않았으나, 경사진 해저 면에 잠수식 저장탱크를 설치하는 경우 경사진 해저 면에 맞게 파운데이션 플레이트(700)를 설치할 수도 있지만 경사진 해저 면의 경사진 부분에 H자 형상을 설치하여 파운데이션 플레이트(700)가 기울어지지 않도록 구성할 수도 있다.In addition, although not shown in the drawings, when installing a submersible storage tank on the inclined bottom surface may be installed a foundation plate 700 to fit the inclined bottom surface, but by installing an H-shape on the inclined portion of the inclined bottom surface The foundation plate 700 may be configured not to tilt.
본 발명은 한정된 실시 예와 도면을 통하여 설명되었으나, 본 발명은 이에 한정되는 것은 아니며, 본 발명이 속하는 기술 분야에서 통상의 지식을 가진 자에 의해 본 발명의 기술 사상과 아래에 기재된 특허청구범위의 균등 범위 내에서 다양한 수정 및 변형이 가능하다.Although the present invention has been described through limited embodiments and drawings, the present invention is not limited thereto, and the present invention is defined by those of ordinary skill in the art to which the present invention pertains and the claims hereinafter described. Various modifications and variations are possible within the scope of equivalents.
이상에서 설명한 바와 같이, 본 발명은 발전플랜트에 LNG 공급을 외부에서 할 수 있도록 하되, 별도로 해저에 LNG 저장을 위한 잠수식의 저장탱크를 설치하므로 육지로부터 가스공급이 불가한 지역에서도 안정적으로 전력생산이 가능하다.As described above, the present invention allows the supply of LNG to the power plant from the outside, but separately installs a submersible storage tank for storing LNG on the seabed to produce electricity stably in areas where gas supply is not possible from land. This is possible.
또한, 본 발명은 저장탱크의 슬로싱(Sloshing)이 없으므로 마찰열이 없고 수중에서 저장탱크로 전해지는 열이 해상보다 현저히 적으므로 BOG 발생량을 현저하게 감소시킬 수 있다.In addition, in the present invention, since there is no sloshing of the storage tank, there is no frictional heat, and heat transmitted to the storage tank in water is significantly smaller than at sea, thereby reducing the amount of BOG generated.
또한, 본 발명은 LNG 로딩(Loading)이 발전플랜트와는 상관없이 수중에서 저장탱크와 LNG 벙커링 선박(Bunkering Vessel) 사이에서 이루어지기 때문에 발전플랜트의 전력생산에 전혀 영향을 주지 않는다.In addition, the present invention does not affect the power generation of the power plant at all because LNG loading is made between the storage tank and the LNG bunkering vessel in the water regardless of the power plant.
또한, 본 발명은 갑작스런 기상악화로 발전플랜트가 위험에 노출되더라도 저장탱크는 해저에 안전하게 설치되므로 저장탱크 파손으로 인한 환경피해를 전혀 주지 않는다.In addition, the present invention does not cause any environmental damage due to storage tank damage because the storage tank is safely installed on the sea floor even if the power plant is exposed to danger due to sudden bad weather.
또한, 본 발명은 발전플랜트와 저장탱크를 따로 동시에 제작할 수 있기 때문에 획기적인 공기 단축이 가능하다.In addition, the present invention can produce a power plant and a storage tank separately at the same time it is possible to significantly shorten the air.
또한, 본 발명은 발전플랜트와 저장탱크를 따로 운반(Transportation), 설치(Installation)하기 때문에 리프팅 로드(Lifting Load)가 줄어든다.In addition, the present invention reduces the lifting load (Lifting Load) because the transport and installation of the power plant and the storage tank separately.
또한, 본 발명은 해저에 설치된 저장탱크에서 발전플랜트뿐만 아니라 FSRU 또는 육상 LNG 터미널 등 다양한 가스 관련 설비로도 LNG 공급이 가능하다.In addition, the present invention can supply LNG to a variety of gas-related facilities, such as FSRU or land LNG terminal, as well as the power plant in the storage tank installed on the seabed.
또한, 본 발명은 저장탱크의 이동이 가능하므로 다양한 가스 관련 분야에서 널리 사용 가능하다.In addition, the present invention can be widely used in various gas-related fields because the storage tank can be moved.
또한, 본 발명은 잭업 유닛에 의해서 발전플랜트의 위치가 고정되도록 설계하여 해상의 기상 상태에 영향을 받지 않고 안전하게 전력을 생산할 수 있다.In addition, the present invention is designed so that the position of the power plant is fixed by the jack-up unit can safely produce power without being affected by the weather conditions of the sea.

Claims (18)

  1. 발전모듈을 구비하는 발전플랜트;A power generation plant having a power generation module;
    상기 발전모듈에 LNG를 공급하여 전력을 생산할 수 있도록 해저에 설치되는 잠수식 저장탱크; 및Submersible storage tank is installed on the seabed to produce electricity by supplying LNG to the power generation module; And
    LNG 공급을 위해서 상기 발전플랜트와 상기 잠수식 저장탱크를 연결하는 연결파이프;를 포함하는 발전플랜트 시스템.And a connecting pipe connecting the power plant and the submersible storage tank to supply LNG.
  2. 청구항 1에 있어서,The method according to claim 1,
    상기 잠수식 저장탱크는The submersible storage tank
    내부 벽 및 외부 벽에 의해 이중벽 구조로 이루어지는 탱크 몸체;A tank body made of a double wall structure by an inner wall and an outer wall;
    상기 탱크 몸체의 내부 벽과 외부 벽 사이에 형성되는 밸러스트 탱크; 및A ballast tank formed between an inner wall and an outer wall of the tank body; And
    상기 연결파이프가 연결될 수 있도록 상기 탱크 몸체에 형성되는 연결부;를 포함하는 발전플랜트 시스템.And a connecting portion formed in the tank body so that the connecting pipes can be connected to each other.
  3. 청구항 1에 있어서,The method according to claim 1,
    상기 잠수식 저장탱크는The submersible storage tank
    LNG의 배출을 위해 상기 잠수식 저장탱크의 내부 바닥까지 연장되는 파이프 조립체; 및A pipe assembly extending to the inner bottom of the submersible storage tank for the discharge of LNG; And
    상기 파이프 조립체의 하단에 장착된 배출펌프;를 포함하는 발전플랜트 시스템.And a discharge pump mounted to the bottom of the pipe assembly.
  4. 청구항 2에 있어서,The method according to claim 2,
    상기 잠수식 저장탱크는 밸러스트 수를 상기 밸러스트 탱크의 내부에 공급하기 위한 상,하부 개폐밸브를 포함하는 발전플랜트 시스템.The submersible storage tank is a power plant system including a top, bottom opening and closing valve for supplying the ballast water into the ballast tank.
  5. 청구항 2에 있어서,The method according to claim 2,
    상기 연결부는 액체 및/또는 가스 돔을 포함하는 것을 특징으로 하는 발전플랜트 시스템.And said connection portion comprises a liquid and / or gas dome.
  6. 청구항 1에 있어서,The method according to claim 1,
    상기 연결파이프는 다수의 단위 연결파이프들로 연결되는 것을 특징으로 하는 발전플랜트 시스템.The power supply plant system, characterized in that the connection pipe is connected to a plurality of unit connection pipes.
  7. 청구항 6에 있어서,The method according to claim 6,
    상기 단위 연결파이프의 연결부위에는 조인트가 설치되는 것을 특징으로 하는 발전플랜트 시스템.Generating plant system, characterized in that the joint is installed in the connection portion of the unit connection pipe.
  8. 청구항 1에 있어서,The method according to claim 1,
    상기 연결파이프는 내부에 액체통로와 증발가스통로가 복수 개 설치되는 것을 특징으로 하는 발전플랜트 시스템.The connection pipe is a power plant system, characterized in that a plurality of liquid passage and the evaporation gas passage is installed inside.
  9. 청구항 1에 있어서,The method according to claim 1,
    상기 발전플랜트에는 재기화설비가 설치되는 것을 특징으로 하는 발전플랜트 시스템.The power generation plant system, characterized in that the regasification plant is installed in the power plant.
  10. 청구항 1에 있어서,The method according to claim 1,
    상기 잠수식 저장탱크에는 BOP(Blow Out Preventer)가 설치되는 것을 특징으로 하는 발전플랜트 시스템.The submersible storage tank is a BOP (Blow Out Preventer) is installed, characterized in that the power plant system.
  11. 청구항 2에 있어서,The method according to claim 2,
    상기 잠수식 저장탱크에는 밸러스트 수 펌프가 설치되는 것을 특징으로 하는 발전플랜트 시스템.The submersible storage tank is a power plant system, characterized in that the ballast water pump is installed.
  12. 청구항 1에 있어서,The method according to claim 1,
    상기 발전플랜트와 상기 저장탱크는 따로 운반(Transportation) 및 설치(Installation)되는 것을 특징으로 하는 발전플랜트 시스템.The power plant and the storage tank is a power generation plant system, characterized in that transported and installed (Installation) separately.
  13. 청구항 1에 있어서,The method according to claim 1,
    상기 잠수식 저장탱크의 슬로싱(Sloshing)이 없으므로 마찰열이 없고 수중에서 상기 잠수식 저장탱크로 전해지는 열이 해상보다 적어서 BOG 발생량이 감소되는 것을 특징으로 하는 발전플랜트 시스템.Since there is no sloshing of the submersible storage tank, there is no frictional heat, and heat transmitted to the submersible storage tank in water is smaller than at sea so that the generation of BOG is reduced.
  14. 청구항 1에 있어서,The method according to claim 1,
    LNG 로딩(Loading)은 상기 발전플랜트와는 상관없이 수중에서 상기 잠수식 저장탱크와 LNG 벙커링 선박(Bunkering Vessel) 사이에서 이루어지는 것을 특징으로 하는 발전플랜트 시스템.LNG loading (Loading) is a power plant system characterized in that it is made between the submersible storage tank and the LNG bunkering vessel (Bunkering Vessel) in the water irrespective of the power plant.
  15. 청구항 1에 있어서,The method according to claim 1,
    상기 잠수식 저장탱크는The submersible storage tank
    다중 격벽 구조로 이루어지는 탱크 몸체;A tank body made of a multi-bulk wall structure;
    상기 다중 격벽 사이에 형성되는 밸러스트 수 탱크; 및A ballast water tank formed between the multiple partition walls; And
    상기 다중 격벽 사이에 형성되는 콘크리트 탱크;를 포함하는 발전플랜트 시스템.A power plant system comprising; concrete tanks formed between the multiple partition walls.
  16. 청구항 1에 있어서,The method according to claim 1,
    상기 발전플랜트는 잭업 유닛을 구비하며, 상기 잭업 유닛은 수직으로 해저 면까지 설치되고, 업다운 가능하게 설치되는 것을 특징으로 하는 발전플랜트 시스템.The power generation plant is provided with a jack-up unit, the jack-up unit is installed vertically up to the sea floor, the power generation plant system, characterized in that it is installed to be up-down.
  17. 전력을 생산하기 위한 발전모듈을 구비하는 발전플랜트에 LNG 공급을 위해서 해저에 설치되며, 연결파이프를 통해서 상기 발전플랜트에 연결되는 발전플랜트 시스템의 잠수식 저장탱크.Submersible storage tank of the power plant system is installed on the seabed for supplying LNG to the power plant having a power generation module for producing power, connected to the power plant through a connecting pipe.
  18. 해저 면에는 파운데이션 플레이트가 설치되고, 상기 파운데이션 플레이트의 상부에는 안내 경사면을 갖는 센터 안착 홈이 형성되며, A foundation plate is installed on the bottom of the seabed, and a center seating groove having a guide inclined surface is formed on an upper portion of the foundation plate.
    잠수식 저장탱크가 상기 파운데이션 플레이트 위에 결합되도록 상기 잠수식 저장탱크의 바닥면에는 상기 안내 경사면에 의해 가이되 되면서 상기 센터 안착 홈 안에 삽입되는 센터 안착 돌기가 형성되는 것을 특징으로 하는 발전플랜트 시스템의 잠수식 저장탱크 설치구조.The submersible of the power plant system, characterized in that the bottom surface of the submersible storage tank is coupled by the guide inclined surface so that the submersible storage tank is coupled to the foundation plate while being inserted into the center seating groove. Storage tank installation structure.
PCT/KR2015/003164 2014-05-01 2015-03-31 Power plant system, submerged storage tank of same power plant system, and installation structure of same submerged storage tank WO2015167131A1 (en)

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KR10-2014-0053054 2014-05-01
KR1020140053054A KR101606691B1 (en) 2014-05-01 2014-05-01 Jack up type power plant system
KR1020140056660A KR101559413B1 (en) 2014-05-12 2014-05-12 Power plant system
KR10-2014-0056660 2014-05-12

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1061599A (en) * 1996-08-20 1998-03-03 Mitsubishi Heavy Ind Ltd Submarine lng storage system
JP2007131045A (en) * 2005-11-08 2007-05-31 Universal Shipbuilding Corp Fluid supplying device and offshore fluid supplying vessel
KR20110049485A (en) * 2009-11-05 2011-05-12 엄항섭 Cargo tanks of liquefied gas carriers and its supporting structures
KR20130009460A (en) * 2011-07-15 2013-01-23 에스티엑스조선해양 주식회사 Floating storage regasfication power generation bunkering
US8613569B2 (en) * 2008-11-19 2013-12-24 Efficient Engineering, Llc Stationary positioned offshore windpower plant (OWP) and the methods and means for its assembling, transportation, installation and servicing

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1061599A (en) * 1996-08-20 1998-03-03 Mitsubishi Heavy Ind Ltd Submarine lng storage system
JP2007131045A (en) * 2005-11-08 2007-05-31 Universal Shipbuilding Corp Fluid supplying device and offshore fluid supplying vessel
US8613569B2 (en) * 2008-11-19 2013-12-24 Efficient Engineering, Llc Stationary positioned offshore windpower plant (OWP) and the methods and means for its assembling, transportation, installation and servicing
KR20110049485A (en) * 2009-11-05 2011-05-12 엄항섭 Cargo tanks of liquefied gas carriers and its supporting structures
KR20130009460A (en) * 2011-07-15 2013-01-23 에스티엑스조선해양 주식회사 Floating storage regasfication power generation bunkering

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