KR102285463B1 - Fuel gas supply system - Google Patents

Fuel gas supply system Download PDF

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KR102285463B1
KR102285463B1 KR1020170068776A KR20170068776A KR102285463B1 KR 102285463 B1 KR102285463 B1 KR 102285463B1 KR 1020170068776 A KR1020170068776 A KR 1020170068776A KR 20170068776 A KR20170068776 A KR 20170068776A KR 102285463 B1 KR102285463 B1 KR 102285463B1
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engine
gas
fuel
compressor
storage tank
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KR1020170068776A
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Korean (ko)
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KR20180133002A (en
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이호기
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삼성중공업 주식회사
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H21/00—Use of propulsion power plant or units on vessels
    • B63H21/38—Apparatus or methods specially adapted for use on marine vessels, for handling power plant or unit liquids, e.g. lubricants, coolants, fuels or the like
    • 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
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F02M21/0203—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels characterised by the type of gaseous fuel
    • F02M21/0215—Mixtures of gaseous fuels; Natural gas; Biogas; Mine gas; Landfill gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
    • F02M21/0221—Fuel storage reservoirs, e.g. cryogenic tanks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
    • F02M21/0245—High pressure fuel supply systems; Rails; Pumps; Arrangement of valves
    • 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
    • B63B2770/00—
    • 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
    • F17C2227/0171—Arrangement
    • F17C2227/0185—Arrangement comprising several pumps or 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
    • 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
    • F17C2265/06—Fluid distribution
    • F17C2265/066—Fluid distribution for feeding engines for propulsion
    • 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
    • F17C2270/0105—Ships
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/30—Use of alternative fuels, e.g. biofuels

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Ocean & Marine Engineering (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

연료가스 공급시스템이 개시된다. 본 발명의 실시 예에 의한 연료가스 공급시스템은 액화가스 및 액화가스의 증발가스를 저장하는 저장탱크; 제1엔진에서 방출하는 배기가스에 의해 구동하는 터빈; 및 터빈과 동일 축으로 연결되며, 터빈에 의해 구동되는 제1압축기와 제2압축기;를 포함하되, 제1압축기는 외부로부터 공기를 흡입 및 압축하여 제1엔진으로 공급하고, 제2압축기는 저장탱크로부터 공급받은 증발가스를 압축하여 제2엔진의 연료로 공급한다.A fuel gas supply system is disclosed. A fuel gas supply system according to an embodiment of the present invention includes: a storage tank for storing liquefied gas and boil-off gas of the liquefied gas; a turbine driven by exhaust gas emitted from the first engine; and a first compressor and a second compressor connected coaxially with the turbine and driven by the turbine, wherein the first compressor sucks and compresses air from the outside and supplies it to the first engine, and the second compressor is stored The boil-off gas supplied from the tank is compressed and supplied as fuel for the second engine.

Description

연료가스 공급시스템{FUEL GAS SUPPLY SYSTEM}Fuel gas supply system {FUEL GAS SUPPLY SYSTEM}

본 발명은 연료가스 공급시스템에 관한 것이다.The present invention relates to a fuel gas supply system.

온실가스 및 각종 대기오염 물질의 배출에 대한 국제해사기구(IMO, International Maritime Organization)의 규제가 강화됨에 따라 조선 및 해운업계에서는 기존 연료인 중유, 디젤유의 이용을 대신하여, 청정 에너지원인 천연가스를 선박의 연료가스로 이용하는 경우가 많아지고 있다.As the International Maritime Organization (IMO)'s regulations on the emission of greenhouse gases and various air pollutants have been strengthened, the shipbuilding and shipping industry has been using natural gas as a clean energy source instead of using heavy oil and diesel oil, which are the existing fuels. It is increasingly used as fuel gas for ships.

연료가스 중에서 널리 이용되고 있는 천연가스(Natural Gas)는 메탄(Methane)을 주성분으로 하며, 통상적으로 그 부피를 1/600로 줄인 액화가스(Liquefied Gas) 상태로 변환시켜 저장 및 운반을 하고 있다.Natural gas, which is widely used among fuel gases, has methane as its main component, and is stored and transported by converting it into liquefied gas, which is usually reduced in volume by 1/600.

이러한 액화가스는 선체에 단열 처리되어 설치되는 저장탱크에 수용되어 저장 및 수송되며, 선박의 엔진은 액화가스 또는 증발가스(Boiled Off Gas) 등을 연료가스로 공급받아 구동된다. 여기서, 증발가스는 저장탱크 내부에 수용된 액화가스가 자연적으로 기화하여 발생되는 자연증발가스 및 액화가스를 강제적으로 기화시켜 생산한 강제증발가스를 포함한다. 액화가스 또는 증발가스는 압축 및 기화 등의 처리과정을 거쳐 엔진이 요구하는 조건에 맞추어 공급된다.Such liquefied gas is stored and transported by being accommodated in a storage tank installed in the hull with insulation treatment, and the engine of the ship is driven by receiving liquefied gas or boil-off gas (Boiled Off Gas) as fuel gas. Here, the boil-off gas includes natural evaporation gas generated by natural evaporation of the liquefied gas accommodated in the storage tank, and forced evaporation gas produced by forcibly vaporizing the liquefied gas. Liquefied gas or boil-off gas is supplied according to the conditions required by the engine through processing such as compression and vaporization.

선박의 엔진에는 DFDE(Dual Fuel Disel Electric) 엔진 등과 같은 저압(약 5~8bar)의 분사엔진 및 ME-GI 엔진(Man B&W 사의 Gas Injection 엔진)과 같은 고압(약 150~400bar)의 분사엔진이 널리 이용되고 있다. 또한 중압(약 16~18bar)의 연료가스로 연소가 가능한 중압가스 분사엔진이 개발되어 이용되고 있다. 통상적으로 이러한 엔진의 연소를 위해 외부의 공기를 흡입하여 엔진으로 공급하기 위한 터보차저(Turbo Charger)가 이용된다. In the engine of the ship, a low-pressure (about 5-8 bar) injection engine such as a DFDE (Dual Fuel Disel Electric) engine and a high-pressure (about 150-400 bar) injection engine such as an ME-GI engine (Man B&W's gas injection engine) are used. It is widely used. In addition, a medium pressure gas injection engine capable of combustion with fuel gas of medium pressure (about 16 to 18 bar) has been developed and used. In general, for combustion of such an engine, a turbocharger for supplying external air to the engine is used.

또, 저장탱크의 액화가스를 엔진의 연료공급조건에 맞게 고압펌프와 기화기에 의해 가압 및 기화시켜 엔진으로 공급하는 연료공급시스템이 개발되고 있다. 연료공급시스템은 메인엔진으로 공급되는 연료가스의 일부를 분기시켜, 감압밸브에 의해 감압한 후, DFDE 엔진 및 기타 시스템으로 공급하는 구성을 포함할 수 있다.In addition, a fuel supply system for supplying the liquefied gas from the storage tank to the engine by pressurizing and vaporizing it by a high-pressure pump and a vaporizer according to the fuel supply conditions of the engine is being developed. The fuel supply system may include a configuration for branching a portion of the fuel gas supplied to the main engine, reducing the pressure by the pressure reducing valve, and then supplying it to the DFDE engine and other systems.

이 경우, 고압펌프 등에 의해 가압된 연료가스를 다시 감압밸브에 의해 감압하는 과정을 거쳐야 하므로, 불필요한 에너지를 소비할 수 있다.In this case, since the fuel gas pressurized by the high-pressure pump or the like needs to be reduced again by the pressure reducing valve, unnecessary energy may be consumed.

상술한 터보차저 및 연료가스 감압과 관련된 종래기술로서, 한국공개특허 제10-2010-0035223호(2010. 04. 05. 공개) 및 한국공개특허 제10-2016-0113495호(2016.09.29. 공개)를 참조하기 바란다.As a prior art related to the above-described turbocharger and fuel gas decompression, Korean Patent Application Laid-Open No. 10-2010-0035223 (published on Apr. 05, 2010) and Korean Patent Application Laid-Open No. 10-2016-0113495 (published on Sep. 29, 2016) ), please refer to

한국공개특허 제10-2010-0035223호(2010. 04. 05. 공개)Korean Patent Publication No. 10-2010-0035223 (published on April 05, 2010) 한국공개특허 제10-2016-0113495호(2016.09.29. 공개)Korean Patent Publication No. 10-2016-0113495 (published on September 29, 2016)

본 발명의 실시 예는 저장탱크로부터 공급받은 증발가스를 터보차저의 터빈과 연결된 별도의 압축기를 이용하여 압축하여 해당 엔진의 연료로 공급함으로서 터보차저의 잉여 에너지 활용성 및 시스템 효율성을 높이는 연료가스 공급시스템을 제공하고자 한다. According to an embodiment of the present invention, the boil-off gas supplied from the storage tank is compressed using a separate compressor connected to the turbine of the turbocharger and supplied as fuel for the corresponding engine. We want to provide a system.

본 발명의 일 측면에 따르면, 액화가스 및 상기 액화가스의 증발가스를 저장하는 저장탱크; 제1엔진에서 방출하는 배기가스에 의해 구동하는 터빈; 및 상기 터빈과 동일 축으로 연결되며, 상기 터빈에 의해 구동되는 제1압축기와 제2압축기;를 포함하되, 상기 제1압축기는 외부로부터 공기를 흡입 및 압축하여 상기 제1엔진으로 공급하고, 상기 제2압축기는 상기 저장탱크로부터 공급받은 증발가스를 압축하여 제2엔진의 연료로 공급하는 연료가스 공급시스템이 제공될 수 있다.According to an aspect of the present invention, a storage tank for storing liquefied gas and boil-off gas of the liquefied gas; a turbine driven by exhaust gas emitted from the first engine; and a first compressor and a second compressor connected coaxially with the turbine and driven by the turbine, wherein the first compressor sucks and compresses air from the outside and supplies it to the first engine, The second compressor may be provided with a fuel gas supply system that compresses the boil-off gas supplied from the storage tank and supplies it as a fuel of the second engine.

상기 저장탱크로부터 공급받은 액화가스를 가압하는 고압펌프와, 상기 가압된 액화가스를 기화시켜 상기 제1엔진으로 공급하는 기화기와, 상기 저장탱크, 고압펌프, 기화기 및 제1엔진을 연결하는 제1연료공급라인과, 상기 저장탱크로부터 공급받은 증발가스를 상기 제2압축기를 거쳐 상기 제2엔진으로 공급하는 제2연료공급라인을 더 포함할 수 있다.A first connecting a high-pressure pump for pressurizing the liquefied gas supplied from the storage tank, a vaporizer for vaporizing the pressurized liquefied gas and supplying it to the first engine, and the storage tank, the high-pressure pump, the vaporizer and the first engine It may further include a fuel supply line and a second fuel supply line for supplying the boil-off gas supplied from the storage tank to the second engine through the second compressor.

상기 제2연료공급라인로부터 분기되어, 상기 저장탱크로부터 공급받은 증발가스 중 일부를 압축하는 압축부와,a compression unit branched from the second fuel supply line and compressing some of the boil-off gas supplied from the storage tank;

상기 압축된 증발가스를 상기 제1연료공급라인의 상기 기화기 후단으로 합류시키는 분기라인과, 상기 제1연료공급라인의 상기 합류된 지점 후단으로부터 분기되어 상기 제2연료공급라인의 상기 제2압축기 후단과 연결된 합류라인과, 상기 합류라인에 마련되며, 상기 합류라인을 통해 상기 제2엔진으로 공급되는 연료가스를 감압시키는 감압밸브를 더 포함할 수 있다.a branch line for merging the compressed BOG into the rear end of the carburetor of the first fuel supply line, and a rear end of the second compressor of the second fuel supply line branching from the rear end of the merging point of the first fuel supply line It may further include a merging line connected to the merging line, and a pressure reducing valve provided on the merging line to depressurize the fuel gas supplied to the second engine through the merging line.

본 발명의 실시 예에 의한 연료가스 공급시스템은 저장탱크로부터 공급받은 증발가스를 터보차저의 터빈과 연결된 별도의 압축기를 이용하여 압축하여 해당 엔진의 연료로 공급함으로서 터보차저의 잉여 에너지 활용성 및 시스템 효율성을 높일 수 있다.The fuel gas supply system according to an embodiment of the present invention compresses boil-off gas supplied from a storage tank using a separate compressor connected to the turbine of the turbocharger and supplies it as the fuel of the corresponding engine, so that the surplus energy utilization of the turbocharger and the system efficiency can be increased.

본 발명의 효과들은 이상에서 언급한 효과들로 제한되지 않으며, 언급되지 않은 또 다른 효과들은 청구범위의 기재로부터 당업자에게 명확하게 이해될 수 있을 것이다.Effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

도 1은 본 발명의 실시 예에 따른 연료가스 공급시스템을 도시한 것이다.1 shows a fuel gas supply system according to an embodiment of the present invention.

이하에서는 본 발명의 실시 예를 첨부 도면을 참조하여 상세히 설명한다. 이하의 실시 예는 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자에게 본 발명의 사상을 충분히 전달하기 위해 제시하는 것이다. 본 발명은 여기서 제시한 실시 예만으로 한정되지 않고 다른 형태로 구체화될 수도 있다. 도면은 본 발명을 명확히 하기 위해 설명과 관계 없는 부분의 도시를 생략하고, 이해를 돕기 위해 구성요소의 크기를 다소 과장하여 표현할 수 있다. Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The following examples are presented in order to sufficiently convey the spirit of the present invention to those of ordinary skill in the art to which the present invention pertains. The present invention is not limited to the embodiments presented herein and may be embodied in other forms. The drawings may omit the illustration of parts irrelevant to the description in order to clarify the present invention, and may slightly exaggerate the size of the components to help understanding.

도 1을 참조하면, 본 발명의 실시 예에 의한 연료가스 공급시스템(100)은 선박 엔진이 요구하는 메탄가에 맞게 연료가스를 효과적으로 공급할 수 있다. 연료가스 공급시스템(100)은 예컨대 액화연료 운반선, 액화연료 RV(Regasification Vessel), 컨테이너선, 일반상선, LNG FPSO(Floating, Production, Storage and Off-loading), LNG FSRU(Floating Storage and Regasification Unit) 등을 포함하는 각종 선박에 구비될 수 있다.Referring to FIG. 1 , the fuel gas supply system 100 according to an embodiment of the present invention can effectively supply fuel gas according to the methane number required by the marine engine. The fuel gas supply system 100 is, for example, a liquefied fuel carrier, a liquefied fuel RV (Regasification Vessel), a container ship, a commercial ship, an LNG FPSO (Floating, Production, Storage and Off-loading), an LNG FSRU (Floating Storage and Regasification Unit). It can be provided on various ships including the like.

연료가스 공급시스템(100)은 액화가스 및 액화가스의 증발가스를 저장하는 저장탱크(10)와, 제1엔진(E1)에서 방출하는 배기가스에 의해 구동하는 터빈(20)과, 터빈(20)과 동일 축(X)으로 연결되며, 터빈(20)에 의해 구동되는 제1압축기(31)와 제2압축기(32)를 포함한다.The fuel gas supply system 100 includes a storage tank 10 for storing liquefied gas and boil-off gas of the liquefied gas, a turbine 20 driven by exhaust gas emitted from the first engine E1, and the turbine 20 ) and is connected to the same axis (X) and includes a first compressor 31 and a second compressor 32 driven by the turbine 20 .

여기서, 제1압축기(31)는 외부로부터 공기를 흡입 및 압축하여 제1엔진(E1)으로 공급한다. 그리고, 제2압축기(32)는 저장탱크(10)로부터 공급받은 증발가스를 압축하여 제2엔진(E2)의 연료로 공급한다.Here, the first compressor 31 sucks and compresses air from the outside and supplies it to the first engine E1. Then, the second compressor 32 compresses the boil-off gas supplied from the storage tank 10 and supplies it as fuel of the second engine E2.

또, 연료가스 공급시스템(100)은 저장탱크(10)로부터 공급받은 액화가스를 가압하는 고압펌프(40)와, 고압펌프(40)에 의해 가압된 액화가스를 기화시켜 제1엔진(E1)으로 공급하는 기화기(50)와, 저장탱크(10), 고압펌프(40), 기화기(50) 및 제1엔진(E1)을 연결하는 제1연료공급라인(L1)과, 저장탱크(10)로부터 공급받은 증발가스를 제2압축기(32)를 거쳐 제2엔진(E2)으로 공급하는 제2연료공급라인(L2)을 포함한다.In addition, the fuel gas supply system 100 includes a high-pressure pump 40 for pressurizing the liquefied gas supplied from the storage tank 10 and a first engine E1 by vaporizing the liquefied gas pressurized by the high-pressure pump 40 . The first fuel supply line L1 connecting the carburetor 50 supplied to the It includes a second fuel supply line (L2) for supplying the boil-off gas supplied from the second compressor (32) to the second engine (E2).

또, 연료가스 공급시스템(100)은 제2연료공급라인(L2)로부터 분기되어, 저장탱크(10)로부터 공급받은 증발가스 중 일부를 압축하는 압축부(60)와, 압축부(60)에 의해 압축된 증발가스를 제1연료공급라인(L1)의 기화기(50) 후단으로 합류시키는 분기라인(L3)과, 제1연료공급라인(L1)의 합류된 지점 후단으로부터 분기되어 제2연료공급라인(L2)의 제2압축기(32) 후단과 연결된 합류라인(L4)과, 합류라인(L4)에 마련되며, 합류라인(L4)을 통해 제2엔진(E2)으로 공급되는 연료가스를 감압시키는 감압밸브(70)를 포함한다.In addition, the fuel gas supply system 100 is branched from the second fuel supply line L2 and includes a compression unit 60 for compressing some of the boil-off gas supplied from the storage tank 10 , and the compression unit 60 . A branch line (L3) for joining the boil-off gas compressed by the evaporator to the rear end of the carburetor 50 of the first fuel supply line (L1), and the second fuel supply line (L1) branching from the rear end of the merging point The merging line (L4) connected to the rear end of the second compressor (32) of the line (L2) is provided in the merging line (L4), and the fuel gas supplied to the second engine (E2) through the merging line (L4) is reduced pressure and a pressure reducing valve (70).

이하, 연료가스 공급시스템(100)의 각 구성에 대해서 설명한다.Hereinafter, each configuration of the fuel gas supply system 100 will be described.

저장탱크(10)는 예컨대 LNG(Liquefied Natural Gas)를 저장할 수 있으며, 다른 예에서는 제1 및 제2엔진(E1,E2)의 연료로 사용되며, 액화 가능한 다른 물질을 저장할 수도 있다. 저장탱크(10)는 단열상태를 유지하면서 연료를 액화상태로 저장하는 멤브레인형 탱크, SPB형 탱크 등을 포함할 수 있다. The storage tank 10 may store, for example, LNG (Liquefied Natural Gas), and in another example, it is used as a fuel for the first and second engines E1 and E2, and may store other liquefiable materials. The storage tank 10 may include a membrane type tank, an SPB type tank, and the like for storing fuel in a liquefied state while maintaining a thermal insulation state.

제1엔진(E1)은 예컨대, ME-GI 엔진(Man B&W 사의 Gas Injection 엔진)과 같은 고압(약 150~400bar)의 분사엔진일 수 있다. 또, 제2엔진(E2)은 예컨대, DFDE(Dual Fuel Disel Electric) 엔진 등과 같은 저압(약 5~8bar)의 분사엔진, 중압(약 16~18bar)의 연료가스로 연소가 가능한 중압가스 분사엔진을 포함할 수 있다.The first engine E1 may be, for example, a high-pressure (about 150 to 400 bar) injection engine, such as a ME-GI engine (Man B&W's Gas Injection engine). In addition, the second engine E2 is, for example, a low pressure (about 5 to 8 bar) injection engine, such as a DFDE (Dual Fuel Disel Electric) engine, a medium pressure gas injection engine capable of combustion with fuel gas of a medium pressure (about 16 to 18 bar). may include.

저장탱크(10)로부터 공급받은 액화가스는 제1연료공급라인(L1)을 통해 제1엔진(E1)의 연료로 공급된다. The liquefied gas supplied from the storage tank 10 is supplied as a fuel of the first engine E1 through the first fuel supply line L1.

제1연료공급라인(L1)은 저장탱크(10), 고압펌프(40), 기화기(50) 및 제1엔진(E1)을 연결한다.The first fuel supply line L1 connects the storage tank 10 , the high-pressure pump 40 , the carburetor 50 and the first engine E1 .

고압펌프(40)는 저장탱크(10)로부터 공급받은 액화가스를 가압하며, 기화기(50)는 고압펌프(40)에 의해 가압된 액화가스를 기화시켜 제1엔진(E1)으로 공급한다.The high-pressure pump 40 pressurizes the liquefied gas supplied from the storage tank 10 , and the vaporizer 50 vaporizes the liquefied gas pressurized by the high-pressure pump 40 and supplies it to the first engine E1 .

이때, 제1엔진(E1)의 배기가스는 터빈(20)을 구동시키며, 터빈(20)은 동일 축(X)으로 연결된 제1압축기(31)로 회전력을 전달한다. 즉, 터빈(20)에 내장된 휠의 회전 토크가 축(X)에 의해 제1압축기(31)의 휠로 전달될 수 있다.At this time, the exhaust gas of the first engine E1 drives the turbine 20 , and the turbine 20 transmits the rotational force to the first compressor 31 connected to the same axis X . That is, the rotational torque of the wheel built in the turbine 20 may be transmitted to the wheel of the first compressor 31 by the axis (X).

제1압축기(31)는 외부로부터 공기를 흡입 및 압축하여 제1엔진(E1)으로 공급한다. 즉, 제1압축기(31)에 내장된 휠의 회전에 의해서 유입된 공기가 압축되어 제1엔진(E1)으로 공급되며, 제1엔진(E1)의 연소 작용에 사용될 수 있다.The first compressor 31 sucks and compresses air from the outside and supplies it to the first engine E1. That is, the air introduced by the rotation of the wheel built into the first compressor 31 is compressed and supplied to the first engine E1 , and may be used for the combustion action of the first engine E1 .

상술한 터빈(20)과 제1압축기(31)는 종래의 터보차저(Turbo Charger)에 포함된 구성이며, 터보차저의 성능은 통상적으로 엔진의 요구량보다 대략 4~12％ 더 우수할 수 있다. 이에 본 발명의 실시 예에서는 터빈(20)과 동일 축(X)으로 연결된 별도의 제2압축기(32)를 마련할 수 있다.The above-described turbine 20 and the first compressor 31 are components included in a conventional turbocharger, and the performance of the turbocharger may be generally superior to the required amount of the engine by about 4 to 12%. Accordingly, in the embodiment of the present invention, a separate second compressor 32 connected to the turbine 20 and the same axis X may be provided.

제2압축기(32)는 제2연료공급라인(L2)을 통해 저장탱크(10)로부터 공급받은 증발가스를 압축하여 제2엔진(E2)의 연료로 공급한다. 종래에는 저장탱크의 액화가스를 가압 및 기화시켜 고압가스분사엔진으로 공급하고, 그 중 일부를 감압하여 중압 또는 저압가스분사엔진으로 공급한다. 이는 시스템 효율을 떨어뜨리고, 에너지 낭비를 가져올 수 있다. The second compressor 32 compresses the boil-off gas supplied from the storage tank 10 through the second fuel supply line L2 and supplies it as the fuel of the second engine E2. Conventionally, the liquefied gas in the storage tank is pressurized and vaporized to be supplied to the high-pressure gas injection engine, and a portion thereof is decompressed and supplied to the medium pressure or low pressure gas injection engine. This may reduce system efficiency and result in energy wastage.

그러나, 본 발명은 제2압축기(32)를 통해 저장탱크(10)로부터 공급받은 증발가스를 압축하여 제2엔진(E2)의 연료로 공급하므로, 터보차저의 잉여 에너지를 최대한 활용하고 시스템 효율성을 높일 수 있다.However, in the present invention, since the boil-off gas supplied from the storage tank 10 is compressed through the second compressor 32 and supplied as fuel for the second engine E2, the surplus energy of the turbocharger is maximized and system efficiency is improved. can be raised

한편, 제1엔진(E1) 및 제2엔진(E2)에 필요한 연료가스는 분기라인(L3)을 통해 보충될 수 있다.On the other hand, the fuel gas required for the first engine (E1) and the second engine (E2) may be replenished through the branch line (L3).

분기라인(L3)은 제2연료공급라인(L2)로부터 분기되어, 저장탱크(10)로부터 공급받은 증발가스 중 일부를 압축부(60)를 통해 압축하고, 해당 압축된 증발가스를 제1연료공급라인(L1)의 기화기(50) 후단으로 합류시킨다.The branch line L3 is branched from the second fuel supply line L2, compresses some of the BOG supplied from the storage tank 10 through the compression unit 60, and converts the compressed BOG into the first fuel. It merges into the rear end of the vaporizer 50 of the supply line (L1).

압축부(60)는 도시하지는 않았으나, 복수의 압축기와 냉각기를 포함할 수 있으며, 저장탱크(10)로부터 공급받은 액화가스의 증발가스를 설정된 압력에 따라 압축시킨다.Although not shown, the compression unit 60 may include a plurality of compressors and a cooler, and compresses the boil-off gas of the liquefied gas supplied from the storage tank 10 according to a set pressure.

또, 합류라인(L4)은 제1연료공급라인(L1)의 합류된 지점 후단으로부터 분기되어 제2연료공급라인(L2)의 제2압축기(32) 후단과 연결된다. 합류라인(L4)에 마련된 감압밸브(70)는 제2엔진(E2)의 연료가스공급조건에 맞게 합류라인(L4)을 통해 제2엔진(E2)으로 공급되는 연료가스를 감압시킨다.In addition, the merging line (L4) is branched from the rear end of the merging point of the first fuel supply line (L1) and is connected to the rear end of the second compressor (32) of the second fuel supply line (L2). The pressure reducing valve 70 provided in the merging line L4 reduces the fuel gas supplied to the second engine E2 through the merging line L4 in accordance with the fuel gas supply conditions of the second engine E2.

이상에서는 특정의 실시 예에 대하여 도시하고 설명하였다. 그러나, 본 발명은 상기한 실시 예에만 한정되지 않으며, 발명이 속하는 기술분야에서 통상의 지식을 가진 자라면 이하의 청구범위에 기재된 발명의 기술적 사상의 요지를 벗어남이 없이 얼마든지 다양하게 변경 실시할 수 있을 것이다.In the above, specific embodiments have been shown and described. However, the present invention is not limited to the above embodiments, and those of ordinary skill in the art to which the invention pertains may make various changes without departing from the spirit of the invention described in the claims below. will be able

10: 저장탱크 20: 터빈
31,32: 제1 및 제2압축기 40: 고압펌프
50: 기화기 60: 압축부
70: 감압밸브 E1,E2: 제1 및 제2엔진
L1: 제1연료공급라인 L2: 제2연료공급라인
L3: 분기라인 L4: 합류라인10: storage tank 20: turbine
31, 32: first and second compressors 40: high pressure pump
50: carburetor 60: compression unit
70: pressure reducing valve E1, E2: first and second engines
L1: First fuel supply line L2: Second fuel supply line
L3: branch line L4: merging line

Claims (3)

액화가스 및 상기 액화가스의 증발가스를 저장하는 저장탱크;
제1엔진에서 방출하는 배기가스에 의해 구동하는 터빈; 및
상기 터빈과 동일 축으로 연결되며, 상기 터빈에 의해 구동되는 제1압축기와 제2압축기;를 포함하되,
상기 제1압축기는 외부로부터 공기를 흡입 및 압축하여 상기 제1엔진으로 공급하고,
상기 제2압축기는 상기 저장탱크로부터 공급받은 증발가스를 압축하여 제2엔진의 연료로 공급하고,
상기 저장탱크로부터 공급받은 액화가스를 가압하는 고압펌프와,
상기 가압된 액화가스를 기화시켜 상기 제1엔진으로 공급하는 기화기와,
상기 저장탱크, 고압펌프, 기화기 및 제1엔진을 연결하는 제1연료공급라인과,
상기 저장탱크로부터 공급받은 증발가스를 상기 제2압축기를 거쳐 상기 제2엔진으로 공급하는 제2연료공급라인과,
상기 제2연료공급라인로부터 분기되어 상기 제1연료공급라인의 상기 기화기 후단과 연결되며, 상기 저장탱크로부터 공급받은 증발가스 중 적어도 일부를 상기 제1연료공급라인으로 합류시키는 분기라인과,
상기 분기라인에 마련되며, 상기 저장탱크로부터 공급받은 증발가스 중 적어도 일부를 압축하여, 상기 압축된 증발가스가 상기 분기라인을 통해 상기 제1연료공급라인으로 공급되도록 하는 압축부와,
상기 제1연료공급라인의 상기 합류된 지점 후단으로부터 분기되어 상기 제2연료공급라인의 상기 제2압축기 후단과 연결된 합류라인과,
상기 합류라인에 마련되며, 상기 합류라인을 통해 상기 제2엔진으로 공급되는 연료가스를 감압시키는 감압밸브가 마련된 연료가스 공급시스템.a storage tank for storing liquefied gas and boil-off gas of the liquefied gas;
a turbine driven by exhaust gas emitted from the first engine; and
A first compressor and a second compressor connected in the same shaft as the turbine and driven by the turbine; including,
The first compressor sucks and compresses air from the outside and supplies it to the first engine,
The second compressor compresses the boil-off gas supplied from the storage tank and supplies it as a fuel of a second engine,
a high-pressure pump for pressurizing the liquefied gas supplied from the storage tank;
a vaporizer for vaporizing the pressurized liquefied gas and supplying it to the first engine;
a first fuel supply line connecting the storage tank, the high-pressure pump, the carburetor and the first engine;
a second fuel supply line for supplying the boil-off gas supplied from the storage tank to the second engine through the second compressor;
a branch line branching from the second fuel supply line and connected to the rear end of the carburetor of the first fuel supply line, and joining at least a portion of the boil-off gas supplied from the storage tank into the first fuel supply line;
a compression unit provided in the branch line and compressing at least a portion of the boil-off gas supplied from the storage tank so that the compressed boil-off gas is supplied to the first fuel supply line through the branch line;
a merging line branched from the rear end of the merging point of the first fuel supply line and connected to the rear end of the second compressor of the second fuel supply line;
A fuel gas supply system provided in the merging line and provided with a pressure reducing valve for depressurizing the fuel gas supplied to the second engine through the merging line. 삭제delete 삭제delete
KR1020170068776A 2017-06-02 2017-06-02 Fuel gas supply system KR102285463B1 (en)

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KR101681727B1 (en) * 2015-07-03 2016-12-01 대우조선해양 주식회사 Boil Off Gas Treatment System

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KR101195641B1 (en) 2008-09-26 2012-10-30 현대중공업 주식회사 Fuel Gas Supply System for LNG carrier using duel fuel diesel electric propulsion engine
KR102074016B1 (en) 2015-03-20 2020-02-06 현대중공업 주식회사 A Treatment System Of Liquefied Gas
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