KR20210145882A - Floating Storage Power Plant - Google Patents

Floating Storage Power Plant Download PDF

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Publication number
KR20210145882A
KR20210145882A KR1020200062244A KR20200062244A KR20210145882A KR 20210145882 A KR20210145882 A KR 20210145882A KR 1020200062244 A KR1020200062244 A KR 1020200062244A KR 20200062244 A KR20200062244 A KR 20200062244A KR 20210145882 A KR20210145882 A KR 20210145882A
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South Korea
Prior art keywords
gas
boil
air
power plant
air cooler
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KR1020200062244A
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Korean (ko)
Inventor
김윤기
허성욱
송지훈
오민혁
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대우조선해양 주식회사
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Priority to KR1020200062244A priority Critical patent/KR20210145882A/en
Publication of KR20210145882A publication Critical patent/KR20210145882A/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 
    • B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
    • B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B17/00—Vessels parts, details, or accessories, not otherwise provided for
    • B63B17/0027—Tanks for fuel or the like ; Accessories therefor, e.g. tank filler caps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B25/00—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby
    • B63B25/02—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods
    • B63B25/08—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid
    • B63B25/12—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed
    • B63B25/16—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed heat-insulated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K23/00—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
    • F01K23/12—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engines being mechanically coupled
    • F01K23/16—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engines being mechanically coupled all the engines being turbines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C9/00—Methods or apparatus for discharging liquefied or solidified gases from vessels not under pressure
    • F17C9/02—Methods or apparatus for discharging liquefied or solidified gases from vessels not under pressure with change of state, e.g. vaporisation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
    • B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
    • B63B2035/4433—Floating structures carrying electric power plants
    • B63B2035/444—Floating structures carrying electric power plants for converting combustion energy into electric energy
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/03—Mixtures
    • F17C2221/032—Hydrocarbons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/01—Propulsion of the fluid
    • F17C2227/0128—Propulsion of the fluid with pumps or compressors
    • F17C2227/0135—Pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/01—Propulsion of the fluid
    • F17C2227/0128—Propulsion of the fluid with pumps or compressors
    • F17C2227/0157—Compressors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/03—Heat exchange with the fluid
    • F17C2227/0302—Heat exchange with the fluid by heating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/03—Heat exchange with the fluid
    • F17C2227/0337—Heat exchange with the fluid by cooling
    • F17C2227/0341—Heat exchange with the fluid by cooling using another fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2265/00—Effects achieved by gas storage or gas handling
    • F17C2265/03—Treating the boil-off
    • F17C2265/031—Treating the boil-off by discharge
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2265/00—Effects achieved by gas storage or gas handling
    • F17C2265/05—Regasification
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2265/00—Effects achieved by gas storage or gas handling
    • F17C2265/06—Fluid distribution
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2265/00—Effects achieved by gas storage or gas handling
    • F17C2265/07—Generating electrical power as side effect
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2270/00—Applications
    • F17C2270/01—Applications for fluid transport or storage
    • F17C2270/0102—Applications for fluid transport or storage on or in the water

Abstract

The present invention relates to a floating power plant. More particularly, the present invention relates to a floating power plant capable of increasing the gas turbine output of a floating power plant by utilizing the cooling heat of boil-off gas. According to the present invention, a floating power plant comprises: a liquefied gas storage tank; an air cooler configured to heat-exchange the boil-off gas generated in the liquefied gas storage tank with air to recover cooling heat of the boil-off gas; and a gas power generation unit for generating electric power by burning the air cooled by the air cooler and the boil-off gas.

Description

부유식 발전 플랜트 {Floating Storage Power Plant}Floating Storage Power Plant

본 발명은 부유식 발전 플랜트에 관한 것으로, 보다 구체적으로는 증발가스의 냉열을 활용하여 부유식 발전 플랜트의 가스터빈 출력을 증대시킬 수 있는 부유식 발전 플랜트에 관한 것이다. The present invention relates to a floating power plant, and more particularly, to a floating power plant capable of increasing the gas turbine output of the floating power plant by utilizing the cooling heat of boil-off gas.

발전플랜트를 육상에 고정한 형태에서 벗어나 선박이나 해상 구조물에 탑재한 부유식 발전 플랜트(FSPP; Floating, Storage, Power Plant) 기술들이 개발되고 있다. 선박이나 해상 구조물은 플랜트를 설치하기 위한 용지 구입 비용이나, 기초 공사 비용을 절감할 수 있으면서도, 연료 수급이 용이한 곳이나 전력 공급이 필요한 곳에 시의적절하게 배치할 수 있다는 점에서 유리하다.Floating, Storage, Power Plant (FSPP) technologies that are mounted on ships or offshore structures beyond the fixed form of power plants on land are being developed. Ships and offshore structures are advantageous in that they can be placed in a timely manner where fuel supply is easy or power supply is required while reducing the cost of purchasing land for installing a plant or cost of foundation construction.

부유식 발전 플랜트에는, LNG(Liquefied Natural Gas)를 저장하는 LNG 저장탱크, LNG를 재기화시키는 LNG 재기화 설비 및 재기화 가스를 이용하여 전력을 생산할 수 있는 발전 설비가 탑재되며, 부유식 발전 플랜트를 활용하여 선상에서 생산된 전력을 육상으로 송전할 수 있다. The floating power plant is equipped with an LNG storage tank that stores LNG (Liquefied Natural Gas), an LNG regasification facility that regasifies LNG, and a power generation facility that can generate electricity using the regasification gas. Electricity generated on board can be transmitted to land.

기존의 부유식 발전 플랜트에서는 재기화 가스를 연소시켜 가스 터빈을 구동시키고, 발전기를 이용하여 가스 터빈의 구동력을 전기 에너지로 전환함으로써 전력을 생산한다. 그런데 기존의 부유식 발전 플랜트는 가스 터빈의 발전 효율이 낮고, LNG의 냉열, 발전 플랜트에서 발생하는 폐열 등이 효과적으로 활용되지 못하고 그대로 버려짐으로써, 부유식 발전 플랜트의 에너지 효율이 낮다는 단점이 있었다. In an existing floating power plant, a gas turbine is driven by burning regasified gas, and electric power is generated by converting the driving force of the gas turbine into electrical energy using a generator. However, the existing floating power plant has a disadvantage in that the power generation efficiency of the gas turbine is low and the energy efficiency of the floating power plant is low because the cooling heat of LNG and waste heat generated in the power plant are not effectively utilized and are discarded as they are.

한편, 부유식 발전 플랜트의 LNG 저장탱크에서, 저장된 LNG가 자연기화하여 생성된 증발가스(BOG; Boil-Off Gas)는 응축기(recondenser)로 공급하고, 응축기에서는 LNG와 증발가스를 혼합하여 증발가스를 응축시킨 후 LNG와 함께 기화시켜 엔진의 연료로 사용하였다. 즉, 증발가스의 냉열은 회수되지 못하고 그대로 버려지고 있었다. On the other hand, in the LNG storage tank of a floating power plant, boil-off gas (BOG) generated by natural vaporization of stored LNG is supplied to a condenser, and the boil-off gas is mixed with LNG and boil-off gas in the condenser. After condensing, it was vaporized together with LNG and used as fuel for the engine. That is, the cooling heat of the boil-off gas could not be recovered and was discarded as it is.

따라서, 본 발명은 버려지는 증발가스의 냉열을 회수하여 공기를 냉각시킨 후 가스 발전부로 공급함으로써 가스터빈의 출력을 증대시킬 수 있는 부유식 발전 플랜트를 제공하는 것을 목적으로 한다. Accordingly, an object of the present invention is to provide a floating power plant capable of increasing the output of a gas turbine by recovering the cooling heat of discarded boil-off gas, cooling the air, and supplying it to a gas power generation unit.

상술한 목적을 달성하기 위한 본 발명의 일 측면에 의하면, 액화가스 저장탱크; 상기 액화가스 저장탱크에서 생성된 증발가스와 공기를 열교환시켜 상기 증발가스의 냉열을 회수하는 공기 냉각기; 및 상기 공기 냉각기에서 냉각된 공기와 상기 증발가스를 연소시켜 전력을 생산하는 가스 발전부;를 포함하고, 상기 공기 냉각기는, 상기 증발가스가 유동하는 다수개의 배관이 다발 형상으로 구비되는 증발가스 라인;을 포함하는, 부유식 발전 플랜트이 제공된다. According to one aspect of the present invention for achieving the above object, a liquefied gas storage tank; an air cooler for recovering cooling heat of the boil-off gas by exchanging heat with the air generated in the liquefied gas storage tank; and a gas power generation unit that burns the air cooled by the air cooler and the boil-off gas to generate electric power, wherein the air cooler includes a boil-off gas line in which a plurality of pipes through which the boil-off gas flows are provided in a bundle shape ; A floating power plant comprising a, is provided.

바람직하게는, 상기 공기 냉각기의 증발가스 라인은 코일 형태로 구성되며, 상기 공기 냉각기를 통과하는 공기는 상기 증발가스 라인의 외면을 따라 유동하면서 냉각될 수 있다. Preferably, the boil-off gas line of the air cooler is configured in a coil shape, and the air passing through the air cooler may be cooled while flowing along the outer surface of the boil-off gas line.

바람직하게는, 상기 공기 냉각기에 의해 냉열이 회수된 증발가스를 압축하는 증발가스 압축기;를 더 포함하고, 상기 가스 발전부는, 상기 공기 냉각기에서 냉각된 공기를 압축하는 공기 압축기; 상기 공기 압축기에 의해 압축된 공기와 상기 냉각 증발가스와 상기 증발가스 압축기에 의해 압축된 증발가스를 연소시키는 연소기; 및 상기 연소기로부터 배출되는 배기가스를 작동유체로 하여 터빈을 구동시키고 전력을 생산하는 가스터빈;을 포함할 수 있다. Preferably, the air cooler further comprises a boil-off gas compressor for compressing the boil-off gas from which the cooling heat is recovered by the air cooler, wherein the gas generator includes: an air compressor for compressing the air cooled by the air cooler; a combustor for combusting the air compressed by the air compressor, the cooling BOG, and the BOG compressed by the BOG compressor; and a gas turbine for driving a turbine and generating electric power using the exhaust gas discharged from the combustor as a working fluid.

바람직하게는, 상기 액화가스 저장탱크에 저장된 액화가스를 압축하는 액화가스 공급펌프; 상기 액화가스 공급펌프에 의해 압축된 액화가스를 기화시키는 기화기; 및 상기 기화기에 의해 기화된 재기화 가스를 상기 연소기로 공급하는 액화가스 공급라인;을 더 포함할 수 있다.Preferably, a liquefied gas supply pump for compressing the liquefied gas stored in the liquefied gas storage tank; a vaporizer for vaporizing the liquefied gas compressed by the liquefied gas supply pump; and a liquefied gas supply line for supplying the regasified gas vaporized by the vaporizer to the combustor.

바람직하게는, 상기 증발가스 압축기에 의해 압축된 증발가스는 상기 기화기 하류의 액화가스 공급라인으로 합류될 수 있다.Preferably, the boil-off gas compressed by the boil-off gas compressor may be joined into a liquefied gas supply line downstream of the vaporizer.

바람직하게는, 상기 기화기에 의해 기화된 재기화 가스를 상기 연소기에서 요구하는 온도로 가열하는 트림히터;를 더 포함하고, 상기 증발가스 압축기에 의해 압축된 증발가스는 상기 트림히터에서 더 가열된 후 상기 연소기로 공급될 수 있다. Preferably, the method further includes a trim heater configured to heat the regasified gas vaporized by the vaporizer to a temperature required by the combustor, wherein the boil-off gas compressed by the boil-off gas compressor is further heated in the trim heater It may be supplied to the combustor.

본 발명에 따른 부유식 발전 플랜트는, 별도의 냉동 사이클을 포함하지 않고도, 증발가스의 냉열을 회수하여 가스 발전부로 공급되는 공기를 냉각시킴으로써, 가스터빈의 출력을 증대시킬 수 있다. The floating power plant according to the present invention can increase the output of the gas turbine by recovering the cooling heat of the boil-off gas and cooling the air supplied to the gas power generation unit without including a separate refrigeration cycle.

또한, 증발가스를 가스 발전부의 연료로 사용하여 전력을 생산할 수 있다. In addition, it is possible to generate electricity by using the boil-off gas as a fuel for the gas power generation unit.

도 1은 본 발명의 일 실시예에 따른 부유식 발전 플랜트의 발전 설비를 간략하게 도시한 구성도이다.
도 2는 본 발명의 일 실시예에 따른 공기 냉각기의 배관 시스템 구성을 간략하게 나타낸 개념도이다. 1 is a schematic diagram illustrating a power generation facility of a floating power plant according to an embodiment of the present invention.
2 is a conceptual diagram schematically illustrating a configuration of a piping system of an air cooler according to an embodiment of the present invention.

본 발명의 동작상 이점 및 본 발명의 실시에 의하여 달성되는 목적을 충분히 이해하기 위해서는 본 발명의 바람직한 실시예를 예시하는 첨부도면 및 첨부도면에 기재된 내용을 참조하여야만 한다.In order to fully understand the operational advantages of the present invention and the objects achieved by the practice of the present invention, reference should be made to the accompanying drawings illustrating preferred embodiments of the present invention and the contents described in the accompanying drawings.

이하 첨부한 도면을 참조하여 본 발명의 바람직한 실시예에 대해 구성 및 작용을 상세히 설명하면 다음과 같다. 여기서 각 도면의 구성요소들에 대해 참조 부호를 부가함에 있어 동일한 구성요소들에 한해서는 비록 다른 도면상에 표시되더라도 가능한 한 동일한 부호로 표기되었음에 유의하여야 한다.Hereinafter, the configuration and operation of the preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. Here, it should be noted that in adding reference signs to the elements of each drawing, the same elements are indicated with the same reference numerals as much as possible even though they are indicated on different drawings.

후술하는 본 발명의 일 실시예에서 액화가스는, 가스를 저온으로 액화시켜 수송할 수 있는 액화가스일 수 있으며, 예를 들어, LNG(Liquefied Natural Gas), LEG(Liquefied Ethane Gas), LPG(Liquefied Petroleum Gas), 액화에틸렌가스(Liquefied Ethylene Gas), 액화프로필렌가스(Liquefied Propylene Gas) 등과 같은 액화 석유화학 가스일 수 있다. 후술하는 실시예에서는 대표적인 액화가스인 LNG가 적용되는 것을 예로 들어 설명하기로 한다. In an embodiment of the present invention to be described later, the liquefied gas may be a liquefied gas that can be transported by liquefying the gas at a low temperature, for example, LNG (Liquefied Natural Gas), LEG (Liquefied Ethane Gas), LPG (Liquefied Gas). Petroleum Gas), liquefied ethylene gas (Liquefied Ethylene Gas), liquefied propylene gas (Liquefied Propylene Gas), such as liquefied petrochemical gas may be. In the embodiments to be described later, an example in which LNG, which is a representative liquefied gas, is applied will be described.

또한, 본 발명의 일 실시예에서 부유식 발전 플랜트는, 추진 능력을 갖는 선박일 수도 있고, BMPP(Barge Mounted Power Plant), FSPP(Floating Storage Power Plant)와 같이 추진 능력을 갖지는 않지만 해상에 부유하고 있는 해상 구조물을 포함할 수 있다. 다만, 후술하는 실시예에서는 FSPP에 적용되는 것을 예로 들어 설명하기로 한다. In addition, in an embodiment of the present invention, the floating power plant may be a ship having propulsion capability, and although it does not have propulsion capability such as BMPP (Barge Mounted Power Plant) and FSPP (Floating Storage Power Plant), it floats on the sea. It may include offshore structures that are doing However, in the embodiment to be described later, an example applied to the FSPP will be described.

이하, 도 1 및 도 2를 참조하여, 본 발명의 일 실시예에 따른 부유식 발전 플랜트 및 부유식 발전 플랜트의 운용 방법을 설명하기로 한다.Hereinafter, a floating power plant and an operating method of the floating power plant according to an embodiment of the present invention will be described with reference to FIGS. 1 and 2 .

본 발명에 따른 부유식 발전 플랜트는, LNG를 저장하는 LNG 저장탱크(100); LNG 저장탱크(100)로부터 이송된 LNG를 기화시키는 기화기(200); 기화기(200)에서 기화된 천연가스를 연료로 사용하여 전력을 생산하는 가스 발전부(600); LNG 저장탱크(100)에서 생성된 증발가스(BOG; Boil-Off Gas)의 냉열을 회수하여 가스 발전부(600)로 공급하는 공기(air)를 냉각시키는 공기 냉각기(400); 및 공기 냉각기(400)에서 냉열이 회수된 증발가스를 압축하여 가스 발전부(600)로 공급하는 증발가스 압축기(500);를 포함한다.The floating power plant according to the present invention includes an LNG storage tank 100 for storing LNG; a vaporizer 200 for vaporizing the LNG transferred from the LNG storage tank 100; Gas power generation unit 600 for generating electric power using the natural gas vaporized in the vaporizer 200 as a fuel; an air cooler 400 for cooling the air supplied to the gas power generation unit 600 by recovering the cooling heat of boil-off gas (BOG) generated in the LNG storage tank 100; and a boil-off gas compressor 500 for compressing the boil-off gas recovered from the cooling heat in the air cooler 400 and supplying it to the gas power generation unit 600 .

본 실시예의 가스 발전부(600)는, 기화기(200)에 의해 기화된 천연가스를 연소시키는 연소기(620); 공기 냉각기(400)에 의해 냉각된 공기를 압축하여 연소기(620)로 공급하는 공기 압축기(610); 및 연소기(620)로부터 배출되는 배기가스를 작동유체로 하여 구동되는 가스터빈(630);을 포함하며, 가스터빈(630)의 구동력은 발전기(미도시)에 의해 전력으로 전환된다. The gas power generation unit 600 of this embodiment includes a combustor 620 for burning natural gas vaporized by the vaporizer 200; an air compressor 610 for supplying the compressed air cooled by the air cooler 400 to the combustor 620; and a gas turbine 630 driven by using the exhaust gas discharged from the combustor 620 as a working fluid, wherein the driving force of the gas turbine 630 is converted into electric power by a generator (not shown).

또한, 공기 압축기(610)와 가스터빈(630)은 동축(shaft)으로 연결되어, 가스터빈(630)의 구동력에 의해 공기 압축기(610)가 작동되도록 구성될 수 있다. In addition, the air compressor 610 and the gas turbine 630 may be coaxially connected, and the air compressor 610 may be operated by the driving force of the gas turbine 630 .

또한, 본 실시예에 따른 부유식 발전 플랜트는, 가스터빈(630)으로부터 배출되는 배기가스의 폐열을 회수하여 스팀을 생성하는 폐열회수 스팀 발생기(HRSG; Heat Recovery Steam Generator); 및 폐열회수 스팀 발생기(HRSG)에서 생성된 스팀을 작동유체로 사용하여 터빈을 구동시키고, 터빈의 구동력을 전력으로 전환시켜 전력을 생산하는 스팀 발전기(미도시);를 더 포함할 수 있다. In addition, the floating power plant according to this embodiment, a waste heat recovery steam generator (HRSG; Heat Recovery Steam Generator) to generate steam by recovering waste heat of exhaust gas discharged from the gas turbine 630; and a steam generator (not shown) configured to drive a turbine using the steam generated by the waste heat recovery steam generator (HRSG) as a working fluid, and convert the driving force of the turbine into electric power to generate electric power.

본 실시예의 LNG 저장탱크(100)에 저장된 LNG는 LNG 공급펌프(110)에 의해 가압되며, LNG 공급펌프(110)와 기화기(200)를 연결하는 LNG 공급라인(LL)을 통해 기화기(200)로 이송된다. The LNG stored in the LNG storage tank 100 of this embodiment is pressurized by the LNG supply pump 110 , and the vaporizer 200 through the LNG supply line LL connecting the LNG supply pump 110 and the vaporizer 200 . is transferred to

LNG 공급펌프(110)는 도 1에 도시된 바와 같이 LNG 저장탱크(100)의 내부에 설치되는 반잠수식 펌프일 수도 있고, LNG 저장탱크(100)의 밖에 설치되는 펌프일 수도 있다. 또한, LNG 공급펌프(110)는 LNG를 가스 발전부(600)에서 요구하는 압력까지 압축할 수 있다. As shown in FIG. 1 , the LNG supply pump 110 may be a semi-submersible pump installed inside the LNG storage tank 100 or a pump installed outside the LNG storage tank 100 . In addition, the LNG supply pump 110 may compress the LNG to a pressure required by the gas power generation unit 600 .

본 실시예의 기화기(200)에서는, 열전달 매체(HM)와 LNG 공급라인(LL)을 통해 기화기(200)로 이송된 압축 LNG와의 열교환에 의해, 압축 LNG가 기화된다. 기화기(200)에서 압축 LNG와 열교환되는 열전달 매체는, 해수 또는 글리콜 워터일 수 있다.In the vaporizer 200 of this embodiment, the compressed LNG is vaporized by heat exchange between the heat transfer medium HM and the compressed LNG transferred to the vaporizer 200 through the LNG supply line LL. The heat transfer medium heat-exchanged with compressed LNG in the vaporizer 200 may be seawater or glycol water.

또한, 본 실시예에 따른 부유식 발전 플랜트는, 기화기(200)에서 기화된 천연가스를 연소기(620)에서 요구하는 온도까지 가열하는 트림히터(300);를 더 포함할 수 있다. In addition, the floating power plant according to this embodiment, a trim heater 300 for heating the natural gas vaporized in the vaporizer 200 to the temperature required by the burner 620; may further include.

본 실시예의 공기 냉각기(400)에서 냉열이 회수된 증발가스는 증발가스 압축기(500)에 의해 연소기(620)에서 요구하는 압력까지 압축된 후, 증발가스 라인(BL)을 따라 연소기(620)로 공급된다. After the BOG recovered from the cooling heat in the air cooler 400 of this embodiment is compressed to a pressure required by the combustor 620 by the BOG compressor 500, the BOG is transferred to the combustor 620 along the BOG line BL. is supplied

즉, 본 실시예의 연소기(620)는 기화기(200)에서 기화된 천연가스는 물론 증발가스 라인(BL)을 따라 이송된 증발가스도 연료로 사용할 수 있다. That is, the combustor 620 of this embodiment may use not only the natural gas vaporized in the vaporizer 200 but also the boil-off gas transferred along the boil-off gas line BL as fuel.

LNG 저장탱크(100)로부터 증발가스 라인(BL)을 따라 배출되는 증발가스는, 공기 냉각기(400)에서 냉열이 회수된 후 연소기(620)로 이송되므로, 증발가스를 연소기(620)에서 요구하는 온도로 가열하기 위한 별도의 가열 수단을 필요로 하지 않는다. Since the BOG discharged from the LNG storage tank 100 along the BOG line BL is transferred to the combustor 620 after cooling heat is recovered from the air cooler 400, the BOG is required by the combustor 620. There is no need for a separate heating means for heating to the temperature.

도 1에는 증발가스 압축기(500)의 하류에서 증발가스 라인(BL)이 트림히터(300) 하류의 LNG 공급라인(LL)으로 합류되는 것을 예로 들어 도시하였으며, 따라서 증발가스 압축기(500)에 의해 압축된 증발가스가 트림히터(300)에서 가열된 후 연소기(620)로 이송되는 천연가스 흐름에 합류될 수 있다. 1 shows as an example that the boil-off gas line BL is merged into the LNG supply line LL downstream of the trim heater 300 at the downstream of the boil-off gas compressor 500, and therefore, by the boil-off gas compressor 500 After the compressed boil-off gas is heated in the trim heater 300 , it may be joined to the flow of natural gas transferred to the combustor 620 .

또는, 증발가스 압축기(500)의 하류에서 증발가스 라인(BL)은 트림히터(300) 상류의 LNG 공급라인(LL)으로 합류되도록 연결하여, 증발가스 압축기(500)에 의해 압축된 증발가스가 트림히터(300)에서 추가로 가열된 후 연소기(620)로 이송되도록 할 수도 있다. Alternatively, the boil-off gas line BL in the downstream of the boil-off gas compressor 500 is connected to join the LNG supply line LL upstream of the trim heater 300 , so that the boil-off gas compressed by the boil-off gas compressor 500 is It may be further heated in the trim heater 300 and then transferred to the combustor 620 .

본 실시예의 공기 냉각기(400)에서는, LNG 저장탱크(100)로부터 배출된 증발가스와, 연소기(620)로 공급할 공기를 열교환시키며, 열교환에 의해 증발가스는 가열되고 공기는 냉각된다. 공기 냉각기(400)에서 증발가스의 냉열에 의해 냉각된 공기는 공기 공급라인(AL)을 따라 공기 압축기(610)로 공급된다. In the air cooler 400 of this embodiment, the boil-off gas discharged from the LNG storage tank 100 and the air to be supplied to the combustor 620 are exchanged heat-exchange, and the boil-off gas is heated and the air is cooled by the heat exchange. The air cooled by the cooling heat of the boil-off gas in the air cooler 400 is supplied to the air compressor 610 along the air supply line AL.

본 실시예와 같이, 공기 냉각기(400)에서 증발가스의 냉열을 회수하여 공기를 냉각시킴으로써 공기의 밀도를 높이고, 고밀도의 공기를 공기 압축기(610)로 공급함으로써 가스 발전부(600)의 출력을 증대시킬 수 있다. As in this embodiment, the air cooler 400 recovers the cooling heat of the boil-off gas to cool the air, thereby increasing the density of the air, and supplying the high-density air to the air compressor 610 to increase the output of the gas power generation unit 600 . can be increased

공기 압축기(610)를 통해 연소기(620)로 공급되는 공기를 냉각시켜 밀도를 높이면 가스터빈(630)의 출력을 증대시킬 수 있는데, 공기를 냉각시키기 위해 별도의 냉동시스템(랭킨사이클)을 구비한다면 시스템이 복잡하고 냉매를 압축하기 위한 압축 동력 등 추가 동력이 필요하여 전체적인 에너지 효율이 현저히 떨어진다는 단점이 있다.If the density is increased by cooling the air supplied to the combustor 620 through the air compressor 610, the output of the gas turbine 630 can be increased. If a separate refrigeration system (Rankine cycle) is provided to cool the air There is a disadvantage in that the overall energy efficiency is significantly lowered because the system is complicated and additional power such as compression power to compress the refrigerant is required.

그러나, 본 발명에 따르면, 증발가스를 처리하기 위한 응축기와, 공기를 냉각시키기 위한 냉동사이클을 포함하지 않고, 공기 냉각기(400)를 활용하여, 증발가스와 공기를 열교환시킴으로써 증발가스는 냉열을 회수한 후 가스 발전부(600)의 연료로 공급하고, 공기는 냉각시켜 가스 발전부(600)로 공급하므로, 냉동사이클을 활용하는 경우와 동일한 수준으로 가스터빈(630)의 출력을 증대시킬 수 있다. However, according to the present invention, without including a condenser for processing BOG and a refrigeration cycle for cooling air, the BOG recovers cooling heat by using the air cooler 400 to exchange heat with BOG with air. Then, it is supplied as fuel of the gas power generation unit 600, and the air is cooled and supplied to the gas power generation unit 600, so that the output of the gas turbine 630 can be increased to the same level as when using the refrigeration cycle. .

본 실시예의 공기 냉각기(400)는, 도 2에 도시된 바와 같이, 관 다발 형태의 배관시스템으로 구성될 수 있다. As shown in FIG. 2 , the air cooler 400 of this embodiment may be configured as a tube bundle type piping system.

즉, 공기 냉각기(400)를 통과하는 증발가스의 경로를 제공하는 배관을 둘 이상 포함하는 다발로 구성하고, 공기는 증발가스가 통과하는 관 다발의 외면을 통과하면서 증발가스의 냉열에 의해 냉각되도록 한다. 이와 같이 공기 냉각기(400)를 구성함으로써 열전달 면적을 최대화하여 열교환 효율을 높일 수 있다. That is, it consists of a bundle including two or more pipes providing a path for BOG passing through the air cooler 400, and the air passes through the outer surface of the tube bundle through which BOG passes and is cooled by the cooling heat of BOG. do. By configuring the air cooler 400 in this way, the heat transfer area can be maximized to increase the heat exchange efficiency.

또한, 도 2에 도시된 바와 같이, 다발로 형성되는 다수개의 배관은 코일 형태로 구성되어, 열전달 면적을 최대화시킬 수 있다. In addition, as shown in FIG. 2 , a plurality of pipes formed in bundles are configured in a coil shape to maximize a heat transfer area.

또한, 도 2에 도시된 바와 같이, 공기가 공기 냉각기(400)로 유입되는 입구부 면적을, 공기가 공기 냉각기(400)로부터 배출되는 배출부 면적보다 넓게 함으로써, 냉각된 공기의 흐름이 공기 압축기(610) 측으로 원활하게 이루어지도록 할 수 있다. In addition, as shown in FIG. 2 , by making the inlet area through which air flows into the air cooler 400 larger than the discharge area through which air is discharged from the air cooler 400 , the flow of cooled air is reduced by the air compressor. (610) side can be made smoothly.

본 발명은 상기 실시예에 한정되지 않고, 본 발명의 기술적 요지를 벗어나지 아니하는 범위 내에서 다양하게 수정 또는 변형되어 실시될 수 있음은 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자에 있어서 자명한 것이다.The present invention is not limited to the above embodiments, and it is apparent to those of ordinary skill in the art that various modifications or variations can be implemented without departing from the technical gist of the present invention. did it

100 : LNG 저장탱크
200 : 기화기
300 : 트림히터
400 : 공기 냉각기
500 : 증발가스 압축기
600 : 가스 발전부
610 : 공기 압축기
620 : 연소기
630 : 가스터빈 100: LNG storage tank
200: carburetor
300: trim heater
400 : air cooler
500: boil-off gas compressor
600: gas power generation unit
610: air compressor
620: combustor
630: gas turbine

Claims (6)

액화가스 저장탱크;
상기 액화가스 저장탱크에서 생성된 증발가스와 공기를 열교환시켜 상기 증발가스의 냉열을 회수하는 공기 냉각기; 및
상기 공기 냉각기에서 냉각된 공기와 상기 증발가스를 연소시켜 전력을 생산하는 가스 발전부;를 포함하고,
상기 공기 냉각기는,
상기 증발가스가 유동하는 다수개의 배관이 다발 형상으로 구비되는 증발가스 라인;을 포함하는, 부유식 발전 플랜트. liquefied gas storage tank;
an air cooler for recovering cooling heat of the boil-off gas by exchanging heat with the air generated in the liquefied gas storage tank; and
Including; and a gas power generation unit that burns the air cooled in the air cooler and the boil-off gas to generate electric power;
The air cooler,
A floating power plant comprising a; a boil-off gas line in which a plurality of pipes through which the boil-off gas flows are provided in a bundle shape. 청구항 1에 있어서,
상기 공기 냉각기의 증발가스 라인은 코일 형태로 구성되며,
상기 공기 냉각기를 통과하는 공기는 상기 증발가스 라인의 외면을 따라 유동하면서 냉각되는, 부유식 발전 플랜트. The method according to claim 1,
The boil-off gas line of the air cooler is configured in the form of a coil,
Air passing through the air cooler is cooled while flowing along the outer surface of the boil-off gas line, floating power plant. 청구항 1에 있어서,
상기 공기 냉각기에 의해 냉열이 회수된 증발가스를 압축하는 증발가스 압축기;를 더 포함하고,
상기 가스 발전부는,
상기 공기 냉각기에서 냉각된 공기를 압축하는 공기 압축기;
상기 공기 압축기에 의해 압축된 공기와 상기 냉각 증발가스와 상기 증발가스 압축기에 의해 압축된 증발가스를 연소시키는 연소기; 및
상기 연소기로부터 배출되는 배기가스를 작동유체로 하여 터빈을 구동시키고 전력을 생산하는 가스터빈;을 포함하는, 부유식 발전 플랜트. The method according to claim 1,
Further comprising; a boil-off gas compressor for compressing the boil-off gas from which cooling heat is recovered by the air cooler;
The gas power generation unit,
an air compressor for compressing the air cooled by the air cooler;
a combustor for combusting the air compressed by the air compressor, the cooling BOG, and the BOG compressed by the BOG compressor; and
A floating power plant comprising a; a gas turbine for driving a turbine and generating electric power by using the exhaust gas discharged from the combustor as a working fluid. 청구항 3에 있어서,
상기 액화가스 저장탱크에 저장된 액화가스를 압축하는 액화가스 공급펌프;
상기 액화가스 공급펌프에 의해 압축된 액화가스를 기화시키는 기화기; 및
상기 기화기에 의해 기화된 재기화 가스를 상기 연소기로 공급하는 액화가스 공급라인;을 더 포함하는, 부유식 발전 플랜트.4. The method according to claim 3,
a liquefied gas supply pump for compressing the liquefied gas stored in the liquefied gas storage tank;
a vaporizer for vaporizing the liquefied gas compressed by the liquefied gas supply pump; and
A liquefied gas supply line for supplying the regasified gas vaporized by the vaporizer to the combustor; further comprising, a floating power plant. 청구항 4에 있어서,
상기 증발가스 압축기에 의해 압축된 증발가스는 상기 기화기 하류의 액화가스 공급라인으로 합류되는, 부유식 발전 플랜트.5. The method according to claim 4,
BOG compressed by the BOG compressor is joined to a liquefied gas supply line downstream of the vaporizer, a floating power plant. 청구항 4에 있어서,
상기 기화기에 의해 기화된 재기화 가스를 상기 연소기에서 요구하는 온도로 가열하는 트림히터;를 더 포함하고,
상기 증발가스 압축기에 의해 압축된 증발가스는 상기 트림히터에서 더 가열된 후 상기 연소기로 공급되는, 부유식 발전 플랜트. 5. The method according to claim 4,
A trim heater for heating the regasified gas vaporized by the vaporizer to a temperature required by the burner; further comprising,
BOG compressed by the BOG compressor is further heated in the trim heater and then supplied to the combustor, a floating power plant.
KR1020200062244A 2020-05-25 2020-05-25 Floating Storage Power Plant KR20210145882A (en)

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