KR102548330B1 - Fuel gas supply system - Google Patents

Fuel gas supply system Download PDF

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KR102548330B1
KR102548330B1 KR1020160137309A KR20160137309A KR102548330B1 KR 102548330 B1 KR102548330 B1 KR 102548330B1 KR 1020160137309 A KR1020160137309 A KR 1020160137309A KR 20160137309 A KR20160137309 A KR 20160137309A KR 102548330 B1 KR102548330 B1 KR 102548330B1
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South Korea
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compression unit
line
gas
compression
supply line
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KR1020160137309A
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Korean (ko)
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KR20180044449A (en
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최병윤
강호숙
이상호
이원두
황예림
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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
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/004—Details of vessels or of the filling or discharging of vessels for large storage vessels not under pressure
    • 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
    • F17C2265/032—Treating the boil-off by recovery
    • F17C2265/033—Treating the boil-off by recovery with cooling
    • 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
    • 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

Abstract

연료공급시스템을 개시한다. 본 발명의 실시 예에 따른 연료공급시스템은 액화가스 및 액화가스의 증발가스를 저장하는 저장탱크; 증발가스를 제1압력으로 압축하는 제1압축부; 제1압력에 비해 높은 제2압력으로 압축하며, 서로 병렬 연결된 제2압축부 및 제3압축부; 저장탱크, 제1압축부, 제2압축부 및 엔진을 직렬로 연결하는 제1공급라인; 제1공급라인의 제1압축부와 제2압축부 사이로부터 분기되며, 제2압축부와 병렬로 연결되도록 제3압축부와 제1공급라인의 제2압축부 후단을 연결하는 병렬라인; 병렬라인의 제3압축부 후단으로부터 분기되어, 제3압축부에 의해 압축된 증발가스를 공급하는 재액화라인; 및 제1공급라인의 제1압축부 전단에 마련되며, 저장탱크로부터 공급된 액화가스와 재액화라인을 통해 공급된 증발가스 간 열교환하는 열교환부;를 포함한다.Start the fuel supply system. A fuel 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 first compression unit for compressing the boil-off gas to a first pressure; a second compression unit and a third compression unit that are compressed at a second pressure higher than the first pressure and connected in parallel to each other; a first supply line connecting the storage tank, the first compression unit, the second compression unit, and the engine in series; a parallel line branching from between the first compression unit and the second compression unit of the first supply line and connecting a third compression unit and a rear end of the second compression unit of the first supply line so as to be connected in parallel with the second compression unit; a re-liquefaction line branching from the rear end of the third compression unit in the parallel line and supplying boil-off gas compressed by the third compression unit; and a heat exchange unit provided at a front end of the first compression unit of the first supply line and exchanging heat between the liquefied gas supplied from the storage tank and the boil-off gas supplied through the re-liquefaction line.

Description

연료공급시스템{FUEL GAS SUPPLY SYSTEM}Fuel supply system {FUEL GAS SUPPLY SYSTEM}

본 발명은 연료공급시스템에 관한 것이다.The present invention relates to a fuel supply system.

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

연료가스 중에서 널리 이용되고 있는 천연가스(Natural Gas)는 메탄(Methane)을 주성분으로 하며, 통상적으로 그 부피를 1/600로 줄인 액화가스(Liquefied Gas) 상태로 변화되어 저장 및 운반되고 있다.Natural gas, which is widely used among fuel gases, has methane as its main component, and is usually stored and transported in a state of liquefied gas with its volume reduced to 1/600.

액화가스를 운반하는 선박은 액화가스를 저장할 수 있도록 단열 처리된 저장탱크를 구비한다. 또, 이러한 선박은 저장탱크에서 자연적으로 발생하는 증발가스(Boiled Off Gas) 또는 저장탱크의 액화가스를 기화시켜 엔진의 연료로 공급하는 연료공급시스템을 마련할 수 있다. 선박의 엔진에는 DFDE(Dual Fuel Disel Electric) 엔진 등과 같은 저압(약 5~8bar)의 분사엔진, ME-GI 엔진(Man B&W 사의 Gas Injection 엔진)과 같은 고압(약 150~700bar)의 분사엔진 및 중압(약 16~18bar)의 연료가스로 연소가 가능한 중압가스 분사엔진이 이용될 수 있다.Ships carrying liquefied gas are provided with an insulated storage tank to store the liquefied gas. In addition, such a ship may provide a fuel supply system for supplying fuel to the engine by vaporizing boil-off gas (Boiled Off Gas) or liquefied gas in the storage tank that is naturally generated in the storage tank. Ship engines include low-pressure (approx. 5-8 bar) injection engines such as DFDE (Dual Fuel Disel Electric) engines, high-pressure (approx. 150-700 bar) injection engines such as ME-GI engines (Man B&W's gas injection engines), and A medium-pressure gas injection engine capable of combustion with medium-pressure (about 16-18 bar) fuel gas can be used.

상술한 연료공급시스템은 저장탱크로부터 공급된 증발가스를 압축부에 의해 압축시켜 엔진의 연료로 공급하거나, 잔여 증발가스를 재액화장치를 이용하여 재액화시켜 다시 저장할 수 있다. 이러한 재액화 장치가 설치된 선박에는 고압의 압축부가 사용된다. In the fuel supply system described above, the boil-off gas supplied from the storage tank may be compressed by a compression unit and supplied as engine fuel, or the remaining boil-off gas may be re-liquefied using a re-liquefying device and stored again. A high-pressure compression unit is used in ships equipped with such a re-liquefaction device.

고압의 압축부는 크기가 크고 고가이며, 통상적으로 하나만 설치된다. 따라서, 해당 압축부에 고장이 발생할 경우, 재액화장치, 엔진, 발전기 등을 모두 사용할 수 없는 문제점이 있다. 관련 기술로서, 한국등록특허 제10-1505796호(2015.03.19. 등록)를 참조하기 바란다.The high-pressure compression section is large and expensive, and usually only one is installed. Therefore, when a failure occurs in the compression unit, there is a problem in that all of the re-liquefying device, engine, and generator cannot be used. As a related technology, please refer to Korea Patent Registration No. 10-1505796 (registered on March 19, 2015).

한국등록특허 제10-1505796호(2015.03.19. 등록)Korean Registered Patent No. 10-1505796 (registered on March 19, 2015)

본 발명의 실시 예는 하나 이상의 압축부가 비정상 상태인 경우에도 다른 압축부를 통한 효과적인 연료 공급이 이루어지도록 하는 연료공급시스템을 제공하고자 한다.An embodiment of the present invention is intended to provide a fuel supply system that effectively supplies fuel through other compression units even when one or more compression units are in an abnormal state.

본 발명의 일 측면에 따르면, 액화가스 및 상기 액화가스의 증발가스를 저장하는 저장탱크; 상기 증발가스를 제1압력으로 압축하는 제1압축부; 상기 제1압력에 비해 높은 제2압력으로 압축하며, 서로 병렬 연결된 제2압축부 및 제3압축부; 상기 저장탱크, 제1압축부, 제2압축부 및 엔진을 직렬로 연결하는 제1공급라인; 상기 제1공급라인의 상기 제1압축부와 상기 제2압축부 사이로부터 분기되며, 상기 제2압축부와 병렬로 연결되도록 상기 제3압축부와 상기 제1공급라인의 상기 제2압축부 후단을 연결하는 병렬라인; 상기 병렬라인의 상기 제3압축부 후단으로부터 분기되어, 상기 제3압축부에 의해 압축된 증발가스를 공급하는 재액화라인; 및 상기 제1공급라인의 상기 제1압축부 전단에 마련되며, 상기 저장탱크로부터 공급된 액화가스와 상기 재액화라인을 통해 공급된 증발가스 간 열교환하는 열교환부;를 포함하는 연료공급시스템이 제공될 수 있다.According to one aspect of the present invention, a storage tank for storing liquefied gas and boil-off gas of the liquefied gas; A first compression unit for compressing the boil-off gas to a first pressure; a second compression unit and a third compression unit that are compressed at a second pressure higher than the first pressure and connected in parallel to each other; a first supply line connecting the storage tank, the first compression unit, the second compression unit, and the engine in series; It is branched from between the first compression part and the second compression part of the first supply line, and the third compression part and the rear end of the second compression part of the first supply line are connected in parallel with the second compression part. Parallel line connecting; a re-liquefaction line branching from the rear end of the third compression unit in the parallel line to supply boil-off gas compressed by the third compression unit; and a heat exchange unit provided at a front end of the first compression unit of the first supply line and exchanging heat between the liquefied gas supplied from the storage tank and the boil-off gas supplied through the re-liquefaction line. It can be.

상기 제1공급라인의 상기 열교환부와 상기 제1압축부 사이로부터 분기되어, 상기 제1공급라인의 상기 제1압축부 후단에 연결되는 바이패스라인과, 상기 제1공급라인의 상기 제1압축부와 상기 제2압축부 사이로부터 분기되어 수요처와 연결된 제2공급라인과, 상기 제1공급라인의 상기 제2압축부 후단으로부터 분기되어 상기 제2공급라인과 연결된 연결라인과, 상기 제1공급라인, 병렬라인, 재액화라인, 바이패스라인, 제2공급라인 및 연결라인 중 하나 이상을 통해 유체를 이동시키기 위해, 해당 라인에 마련된 개폐밸브의 동작을 제어하는 제어부를 더 포함할 수 있다.A bypass line branched between the heat exchange part of the first supply line and the first compression part and connected to the rear end of the first compression part of the first supply line, and the first compression part of the first supply line. A second supply line branched between the unit and the second compression unit and connected to a consumer, a connection line branched from the rear end of the second compression unit of the first supply line and connected to the second supply line, and the first supply line In order to move the fluid through one or more of the line, parallel line, reliquefaction line, bypass line, second supply line, and connection line, a control unit for controlling the operation of the on-off valve provided in the corresponding line may be further included.

상기 제어부는 상기 제1압축부가 비정상 상태인 경우, 상기 저장탱크로부터 공급된 증발가스가 상기 바이패스라인을 통해 공급되어 상기 제2압축부를 거쳐 상기 수요처로 공급되거나, 상기 제3압축부를 거쳐 상기 엔진으로 공급되도록 하고, 상기 제2압축부가 비정상 상태인 경우, 상기 저장탱크로부터 공급된 증발가스가 상기 제1압축부 및 상기 제3압축부를 거쳐 상기 열교환부로 공급되거나, 상기 엔진 쪽으로 공급되도록 하고, 상기 제3압축부가 비정상 상태인 경우, 상기 저장탱크로부터 공급된 증발가스가 상기 제1압축부 및 상기 제2압축부를 거쳐 상기 엔진 쪽으로 공급되거나, 상기 제1압축부를 거쳐 상기 수요처 쪽으로 공급되도록 할 수 있다.When the first compression unit is in an abnormal state, the control unit controls the evaporation gas supplied from the storage tank to be supplied through the bypass line to the consumer via the second compression unit, or to the engine via the third compression unit. When the second compression unit is in an abnormal state, the boil-off gas supplied from the storage tank is supplied to the heat exchange unit via the first compression unit and the third compression unit or supplied to the engine, When the third compression unit is in an abnormal state, the boil-off gas supplied from the storage tank may be supplied to the engine through the first compression unit and the second compression unit, or supplied to the consumer through the first compression unit. .

상기 재액화라인의 상기 열교환부 후단에 마련되며, 상기 열교환부를 거친 유체를 기체성분과 액체성분으로 분리시키는 기액분리기와, 상기 분리된 기체성분을 상기 제1공급라인의 상기 열교환부 전단으로 합류시키는 합류라인과, 상기 분리된 액체성분을 상기 저장탱크로 복귀시키는 복귀라인을 더 포함할 수 있다.A gas-liquid separator provided at the rear end of the heat exchange unit of the re-liquefaction line and separating the fluid that has passed through the heat exchange unit into a gas component and a liquid component, and joining the separated gas component to the front end of the heat exchange unit of the first supply line A joining line and a return line for returning the separated liquid component to the storage tank may be further included.

본 발명의 실시 예에 따른 연료공급시스템은 하나 이상의 압축부가 비정상 상태인 경우에도 다른 압축부를 통한 효과적인 연료 공급이 이루어지도록 할 수 있다.The fuel supply system according to an embodiment of the present invention can ensure that fuel is effectively supplied through other compression units even when one or more compression units are in an abnormal state.

본 발명의 효과들은 이상에서 언급한 효과들로 제한되지 않으며, 언급되지 않은 또 다른 효과들은 청구범위의 기재로부터 당업자에게 명확하게 이해될 수 있을 것이다.The 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 연료공급시스템을 나타낸다.1 shows a fuel supply system according to an embodiment of the present invention.

이하에서는 본 발명의 실시 예들을 첨부 도면을 참조하여 상세히 설명한다. 이하에 소개되는 실시 예들은 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자에게 본 발명의 사상이 충분히 전달될 수 있도록 하기 위해 예로서 제공되는 것이다. 본 발명은 이하 설명되는 실시 예들에 한정되지 않고 다른 형태로 구체화될 수도 있다. 본 발명을 명확하게 설명하기 위하여 설명과 관계없는 부분은 도면에서 생략하였으며 도면들에 있어서, 구성요소의 폭, 길이, 두께 등은 편의를 위하여 과장되어 표현될 수 있다. 명세서 전체에 걸쳐서 동일한 참조번호들은 동일한 구성요소들을 나타낸다.Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments introduced below are provided as examples to sufficiently convey the spirit of the present invention to those skilled in the art to which the present invention belongs. The present invention may be embodied in other forms without being limited to the embodiments described below. In order to clearly explain the present invention, parts irrelevant to the description are omitted from the drawings, and in the drawings, the width, length, thickness, etc. of components may be exaggerated for convenience. Like reference numbers indicate like elements throughout the specification.

도 1을 참조하면, 본 발명의 일 실시 예에 따른 연료공급시스템(100)은 액화가스 및 액화가스의 증발가스를 저장하는 저장탱크(110)와, 저장탱크(110)로부터 공급받은 액화가스의 증발가스를 제1압력으로 압축하는 제1압축부(120)와, 제1압력에 비해 높은 제2압력으로 압축하며, 서로 병렬 연결된 제2압축부(130a) 및 제3압축부(130b)와, 저장탱크(110), 제1압축부(120), 제2압축부(130a) 및 엔진(E)을 직렬로 연결하는 제1공급라인(L1)과, 제1공급라인(L1)의 제1압축부(120)와 제2압축부(130a) 사이로부터 분기되어, 제2압축부(130a)와 병렬로 연결되도록 제3압축부(130b)와 제1공급라인(L1)의 제2압축부(130a) 후단을 연결하는 병렬라인(L2)과, 병렬라인(L2)의 제3압축부(130b) 후단으로부터 분기되어, 제3압축부(130b)에 의해 압축된 증발가스를 공급하는 재액화라인(L3)과, 제1공급라인(L1)의 제1압축부(120) 전단에 마련되며, 저장탱크(110)로부터 공급된 액화가스와 재액화라인(L3)을 통해 공급된 증발가스 간 열교환하는 열교환부(140)를 포함한다. Referring to FIG. 1, the fuel supply system 100 according to an embodiment of the present invention includes a storage tank 110 for storing liquefied gas and boil-off gas of the liquefied gas, and liquefied gas supplied from the storage tank 110. A first compression unit 120 for compressing the boil-off gas to a first pressure, and a second compression unit 130a and a third compression unit 130b that compress the boil-off gas to a second pressure higher than the first pressure and are connected in parallel to each other. , The first supply line (L1) connecting the storage tank 110, the first compression unit 120, the second compression unit (130a) and the engine (E) in series, and the first supply line (L1) The second compression of the third compression unit 130b and the first supply line L1 is branched from between the first compression unit 120 and the second compression unit 130a and connected in parallel with the second compression unit 130a. The parallel line (L2) connecting the rear end of the unit (130a) and the third compression unit (130b) of the parallel line (L2) are branched from the rear end to supply the boil-off gas compressed by the third compression unit (130b). It is provided in front of the liquefaction line (L3) and the first compression unit 120 of the first supply line (L1), and the liquefied gas supplied from the storage tank 110 and the boil-off gas supplied through the re-liquefaction line (L3) It includes a heat exchange unit 140 for exchanging heat between them.

또, 연료공급시스템(100)은 제1공급라인(L1)의 열교환부(140)와 제1압축부(120) 사이로부터 분기되어, 제1공급라인(L1)의 제1압축부(120) 후단에 연결되는 바이패스라인(L4)과, 제1공급라인(L1)의 제1압축부(120)와 제2압축부(130a) 사이로부터 분기되어 수요처(160)와 연결된 제2공급라인(L5)과, 제1공급라인(L1)의 제2압축부(130a) 후단으로부터 분기되어 제2공급라인(L5)과 연결된 연결라인(L6)과, 제1공급라인(L1), 병렬라인(L2), 재액화라인(L3), 바이패스라인(L4), 제2공급라인(L5) 및 연결라인(L6) 중 하나 이상을 통해 유체를 이동시키기 위해, 해당 라인(L1~L5)에 마련된 개폐밸브(V1~V8)의 동작을 제어하는 제어부(미도시)를 포함할 수 있다.In addition, the fuel supply system 100 is branched from between the heat exchange unit 140 and the first compression unit 120 of the first supply line L1, and the first compression unit 120 of the first supply line L1 The bypass line L4 connected to the rear end and the second supply line branched from between the first compression unit 120 and the second compression unit 130a of the first supply line L1 and connected to the consumer 160 ( L5), a connection line (L6) branched from the rear end of the second compression unit (130a) of the first supply line (L1) and connected to the second supply line (L5), the first supply line (L1), and a parallel line ( L2), the re-liquefaction line (L3), the bypass line (L4), the second supply line (L5), and the connection line (L6) to move the fluid through one or more, provided in the corresponding lines (L1 to L5) A controller (not shown) may be included to control the operation of the on/off valves V1 to V8.

여기서, 개폐밸브(V1~V8)는 제1공급라인(L1)의 바이패스라인(L4) 분기지점(A1)과 제1압축부(120) 사이에 마련된 제1개폐밸브(V1)와, 바이패스라인(L4)에 마련된 제2개폐밸브(V2)와, 제1공급라인(L1)의 병렬라인(L2) 분기 지점(A2)과 제1공급라인(L1)의 제2압축부(130a) 사이에 마련된 제3개폐밸브(V3)와, 제1공급라인(L1)의 연결라인(L6) 분기 지점(A3)과 제1공급라인(L1)의 병렬라인(L2) 합류 지점(A4) 사이에 마련된 제4개폐밸브(V4)와, 병렬라인(L2)의 제3압축부(130b) 전단에 마련된 제5개폐밸브(V5)와, 재액화라인(L3)의 열교환부(140) 전단에 마련된 제6개폐밸브(V6)와, 제2공급라인(L5)에 마련된 제7개폐밸브(V7)와, 연결라인(L6)에 마련된 제8개폐밸브(V8)를 포함할 수 있다.Here, the on/off valves V1 to V8 are the first on/off valve V1 provided between the branch point A1 of the bypass line L4 of the first supply line L1 and the first compression unit 120, and The second on-off valve V2 provided in the pass line L4, the branch point A2 of the parallel line L2 of the first supply line L1, and the second compression unit 130a of the first supply line L1 Between the third on-off valve (V3) provided between the branch point (A3) of the connection line (L6) of the first supply line (L1) and the joining point (A4) of the parallel line (L2) of the first supply line (L1) The fourth on-off valve (V4) provided in the parallel line (L2), the fifth on-off valve (V5) provided at the front end of the third compression unit (130b), and the front end of the heat exchange unit (140) of the re-liquefaction line (L3) It may include a sixth opening/closing valve V6 provided, a seventh opening/closing valve V7 provided in the second supply line L5, and an eighth opening/closing valve V8 provided in the connection line L6.

또, 연료공급시스템(100)은 재액화라인(L3)의 열교환부(140) 후단에 마련되며, 열교환부(140)를 거친 유체를 기체성분과 액체성분으로 분리시키는 기액분리기(170)와, 기액분리기(170)에 의해 분리된 기체성분을 제1공급라인(L1)의 열교환부(140) 전단으로 합류시키는 합류라인(L7)과, 기액분리기(170)에 의해 분리된 액체성분을 저장탱크(110)로 복귀시키는 복귀라인(L8)을 포함할 수 있다.In addition, the fuel supply system 100 is provided at the rear end of the heat exchange unit 140 of the re-liquefaction line L3, and a gas-liquid separator 170 for separating the fluid that has passed through the heat exchange unit 140 into a gas component and a liquid component; A confluence line (L7) for joining the gas components separated by the gas-liquid separator 170 to the front end of the heat exchange unit 140 of the first supply line (L1), and a storage tank for the liquid components separated by the gas-liquid separator 170 It may include a return line (L8) returning to (110).

이러한 연료공급시스템(100)은 각종 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 선박에 적용될 수 있다. This fuel supply system 100 is a variety of liquefied fuel carriers, liquefied fuel RV (Regasification Vessel), container ships, general merchant ships, LNG FPSO (Floating, Production, Storage and Off-loading), LNG FSRU (Floating Storage and Regasification Unit) It can be applied to ships including the like.

상술한 저장탱크(110)는 LNG(Liquefied Natural Gas), LPG(Liquefied Petroleum Gas), DME(Dimethylether), 에탄(Ethane) 중 어느 하나를 저장할 수 있으나 이에 한정되는 것은 아니다. 저장탱크(110)는 단열상태를 유지하면서 연료를 액화상태로 저장하는 멤브레인형 탱크, SPB형 탱크 등을 포함할 수 있다. The storage tank 110 described above may store any one of LNG (Liquefied Natural Gas), LPG (Liquefied Petroleum Gas), DME (Dimethylether), and ethane (Ethane), but is not limited thereto. The storage tank 110 may include a membrane-type tank, an SPB-type tank, and the like for storing fuel in a liquefied state while maintaining an adiabatic state.

저장탱크(110)에 저장된 액화가스의 증발가스는 제1공급라인(L1)을 통해 엔진(E) 쪽으로 공급된다. 여기서, 엔진(E)은 예컨대 ME-GI 엔진과 같은 고압가스 분사엔진일 수 있다. 그러나, 이에 한정하지는 않으며, 다른 예에서 엔진(E)은 저압 또는 중압의 분사엔진을 포함할 수도 있다.The boil-off gas of the liquefied gas stored in the storage tank 110 is supplied toward the engine E through the first supply line L1. Here, the engine E may be, for example, a high-pressure gas injection engine such as an ME-GI engine. However, it is not limited thereto, and in another example, the engine E may include a low or medium pressure injection engine.

제1압축부(120)는 저장탱크(110)로부터 공급받은 액화가스의 증발가스를 제1압력으로 압축하며, 제1냉각기(121)는 설정값에 따라 제1압력으로 압축된 증발가스를 냉각시킨다. 제1압축부(120)는 예컨대 원심식 저압 압축기를 포함할 수 있다.The first compression unit 120 compresses the boil-off gas of the liquefied gas supplied from the storage tank 110 to a first pressure, and the first cooler 121 cools the boil-off gas compressed to the first pressure according to a set value. let it The first compression unit 120 may include, for example, a centrifugal low pressure compressor.

제2압축부(130a)는 제1압축부(120)와 직렬로 연결되며, 제2압력으로 증발가스를 압축시킨다.The second compression unit 130a is connected in series with the first compression unit 120 and compresses the boil-off gas to a second pressure.

제3압축부(130b)는 제2압축부(130a)와 병렬로 연결되며, 제2압축부(130a)가 비정상 상태인 경우, 제2압축부(130a)를 대신해서 제2압력으로 증발가스를 압축시킨다.The third compression unit 130b is connected in parallel with the second compression unit 130a, and when the second compression unit 130a is in an abnormal state, the second compression unit 130a replaces the evaporation gas at the second pressure. to compress

제2압축부(130a)와 제3압축부(130b)는 예컨대 용적형 고압 압축기를 포함할 수 있다.The second compression unit 130a and the third compression unit 130b may include, for example, a volumetric high-pressure compressor.

제2압축부(130a)와 제3압축부(130b) 후단에는 각각 설정값에 따라 제2압력으로 압축된 증발가스를 냉각시키는 제2 및 제3냉각기(131,132)가 구비되어 있다.At the rear end of the second compression unit 130a and the third compression unit 130b, second and third coolers 131 and 132 are provided to cool the boil-off gas compressed to the second pressure according to the set value, respectively.

열교환부(140)는 저장탱크(110)로부터 공급된 액화가스와 재액화라인(L3)을 통해 공급된 증발가스 간 열교환을 수행한다. 이때, 제1압축부(120)와 제2압축부(130a) 또는 제1압축부(120)와 제3압축부(130b)를 통과한 압축된 증발가스가 엔진(E)이 필요로 하는 연료량을 초과한 경우, 해당 잔여량이 재액화라인(L3)을 통해 열교환부(140)로 흘러가 저장탱크(110)로부터 공급된 액화가스와 열교환을 수행할 수 있다. The heat exchanger 140 performs heat exchange between the liquefied gas supplied from the storage tank 110 and the boil-off gas supplied through the re-liquefaction line L3. At this time, the compressed boil-off gas passing through the first compression unit 120 and the second compression unit 130a or the first compression unit 120 and the third compression unit 130b is the amount of fuel required by the engine E. If it exceeds, the remaining amount may flow to the heat exchange unit 140 through the re-liquefaction line (L3) and perform heat exchange with the liquefied gas supplied from the storage tank 110.

도시하지는 않았으나, 제어부는 제1압축부(120)가 비정상 상태인 경우, 저장탱크(110)로부터 공급된 증발가스가 바이패스라인(L4)을 통해 공급되어 제2압축부(130a)를 거쳐 수요처(160)로 공급되거나, 제3압축부(130b)를 거쳐 엔진(E)으로 공급되도록 개폐밸브(V1~V8)를 제어할 수 있다. 여기서, 수요처(160)는 예컨대 가스 발전기 등을 포함할 수 있다. Although not shown, the control unit, when the first compression unit 120 is in an abnormal state, the evaporation gas supplied from the storage tank 110 is supplied through the bypass line (L4) to the consumer through the second compression unit (130a). It is possible to control the opening/closing valves V1 to V8 to be supplied to the engine 160 or to the engine E via the third compression unit 130b. Here, the consumer 160 may include, for example, a gas generator.

또, 제어부는 제2압축부(130a)가 비정상 상태인 경우, 저장탱크(110)로부터 공급된 증발가스가 제1압축부(120) 및 제3압축부(130b)를 거쳐 열교환부(140)로 공급되거나, 엔진(E) 쪽으로 공급되도록 개폐밸브(V1~V8)를 제어할 수 있다.In addition, when the second compression unit 130a is in an abnormal state, the control unit transfers the boil-off gas supplied from the storage tank 110 to the heat exchange unit 140 via the first compression unit 120 and the third compression unit 130b. It is possible to control the opening/closing valves V1 to V8 so that they are supplied to or supplied to the engine E.

또, 제어부는 제3압축부(130b)가 비정상 상태인 경우, 저장탱크(110)로부터 공급된 증발가스가 제1압축부(120) 및 제2압축부(130a)를 거쳐 엔진(E) 쪽으로 공급되거나, 제1압축부(120)를 거쳐 수요처(160) 쪽으로 공급되도록 개폐밸브(V1~V8)를 제어할 수 있다.In addition, when the third compression unit 130b is in an abnormal state, the control unit directs the boil-off gas supplied from the storage tank 110 to the engine E via the first compression unit 120 and the second compression unit 130a. The opening/closing valves V1 to V8 may be controlled to be supplied or supplied to the consumer 160 via the first compression unit 120.

기액분리기(170)는 열교환부(140)를 거친 유체를 기체성분과 액체성분으로 분리시키고, 기액분리기(170)에 의해 분리된 기체성분은 제1공급라인(L1)의 열교환부(140) 전단으로 합류될 수 있다. 또, 기액분리기(170)에 의해 분리된 액체성분을 저장탱크(110)로 복귀되어 저장될 수 있다.The gas-liquid separator 170 separates the fluid that has passed through the heat exchange unit 140 into a gas component and a liquid component, and the gas component separated by the gas-liquid separator 170 is the front end of the heat exchange unit 140 of the first supply line L1. can be joined with In addition, the liquid component separated by the gas-liquid separator 170 may be returned to the storage tank 110 and stored.

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 illustrated and described. However, the present invention is not limited to the above-described embodiments, and those skilled in the art can make various changes without departing from the gist of the technical idea set forth in the claims below. You will be able to.

110: 저장탱크 120, 130a, 130b: 압축부
140: 열교환부 150: 제어부
160: 수요처 170: 기액분리기
L1: 제1공급라인 L2: 병렬라인
L3: 재액화라인 L4: 바이패스라인
L5: 제2공급라인 L6: 연결라인
L7: 합류라인 L8: 복귀라인
V1~V8: 개폐밸브110: storage tank 120, 130a, 130b: compression unit
140: heat exchange unit 150: control unit
160: demand source 170: gas-liquid separator
L1: first supply line L2: parallel line
L3: reliquefaction line L4: bypass line
L5: second supply line L6: connection line
L7: confluence line L8: return line
V1~V8: On-off valve

Claims (4)

액화가스 및 상기 액화가스의 증발가스를 저장하는 저장탱크;
상기 증발가스를 제1압력으로 압축하는 제1압축부;
상기 제1압력에 비해 높은 제2압력으로 압축하며, 서로 병렬 연결된 제2압축부 및 제3압축부;
상기 저장탱크, 제1압축부, 제2압축부 및 엔진을 직렬로 연결하는 제1공급라인;
상기 제1공급라인의 상기 제1압축부와 상기 제2압축부 사이로부터 분기되며, 상기 제2압축부와 병렬로 연결되도록 상기 제3압축부와 상기 제1공급라인의 상기 제2압축부 후단을 연결하는 병렬라인;
상기 병렬라인의 상기 제3압축부 후단으로부터 분기되어, 상기 제3압축부에 의해 압축된 증발가스를 공급하는 재액화라인; 및
상기 제1공급라인의 상기 제1압축부 전단에 마련되며, 상기 저장탱크로부터 공급된 액화가스와 상기 재액화라인을 통해 공급된 증발가스 간 열교환하는 열교환부;를 포함하는 연료공급시스템.A storage tank for storing liquefied gas and boil-off gas of the liquefied gas;
A first compression unit for compressing the boil-off gas to a first pressure;
a second compression unit and a third compression unit that are compressed at a second pressure higher than the first pressure and connected in parallel to each other;
a first supply line connecting the storage tank, the first compression unit, the second compression unit, and the engine in series;
It is branched from between the first compression part and the second compression part of the first supply line, and the third compression part and the rear end of the second compression part of the first supply line are connected in parallel with the second compression part. Parallel line connecting;
a re-liquefaction line branching from the rear end of the third compression unit in the parallel line to supply boil-off gas compressed by the third compression unit; and
A fuel supply system comprising: a heat exchange unit provided at a front end of the first compression unit of the first supply line and exchanging heat between the liquefied gas supplied from the storage tank and the boil-off gas supplied through the re-liquefaction line. 제1항에 있어서,
상기 제1공급라인의 상기 열교환부와 상기 제1압축부 사이로부터 분기되어, 상기 제1공급라인의 상기 제1압축부 후단에 연결되는 바이패스라인과,
상기 제1공급라인의 상기 제1압축부와 상기 제2압축부 사이로부터 분기되어 수요처와 연결된 제2공급라인과,
상기 제1공급라인의 상기 제2압축부 후단으로부터 분기되어 상기 제2공급라인과 연결된 연결라인과,
상기 제1공급라인, 병렬라인, 재액화라인, 바이패스라인, 제2공급라인 및 연결라인 중 하나 이상을 통해 유체를 이동시키기 위해, 해당 라인에 마련된 개폐밸브의 동작을 제어하는 제어부를 더 포함하는 연료공급시스템.According to claim 1,
A bypass line branched from between the heat exchange part of the first supply line and the first compression part and connected to a rear end of the first compression part of the first supply line;
A second supply line branched from between the first compression unit and the second compression unit of the first supply line and connected to a customer;
A connection line branched from the rear end of the second compression unit of the first supply line and connected to the second supply line;
In order to move the fluid through at least one of the first supply line, the parallel line, the re-liquefaction line, the bypass line, the second supply line, and the connection line, a control unit for controlling the operation of the on-off valve provided in the corresponding line is further included. fuel supply system. 제2항에 있어서,
상기 제어부는
상기 제1압축부가 비정상 상태인 경우, 상기 저장탱크로부터 공급된 증발가스가 상기 바이패스라인을 통해 공급되어 상기 제2압축부를 거쳐 상기 수요처로 공급되거나, 상기 제3압축부를 거쳐 상기 엔진으로 공급되도록 하고,
상기 제2압축부가 비정상 상태인 경우, 상기 저장탱크로부터 공급된 증발가스가 상기 제1압축부 및 상기 제3압축부를 거쳐 상기 열교환부로 공급되거나, 상기 엔진 쪽으로 공급되도록 하고,
상기 제3압축부가 비정상 상태인 경우, 상기 저장탱크로부터 공급된 증발가스가 상기 제1압축부 및 상기 제2압축부를 거쳐 상기 엔진 쪽으로 공급되거나, 상기 제1압축부를 거쳐 상기 수요처 쪽으로 공급되도록 하는 연료공급시스템.According to claim 2,
The control unit
When the first compression unit is in an abnormal state, the boil-off gas supplied from the storage tank is supplied through the bypass line and supplied to the consumer through the second compression unit or supplied to the engine through the third compression unit. do,
When the second compression unit is in an abnormal state, the boil-off gas supplied from the storage tank is supplied to the heat exchange unit or to the engine via the first compression unit and the third compression unit,
When the third compression unit is in an abnormal state, the boil-off gas supplied from the storage tank is supplied to the engine through the first compression unit and the second compression unit, or supplied to the consumer through the first compression unit. supply system. 제1항에 있어서,
상기 재액화라인의 상기 열교환부 후단에 마련되며, 상기 열교환부를 거친 유체를 기체성분과 액체성분으로 분리시키는 기액분리기와,
상기 분리된 기체성분을 상기 제1공급라인의 상기 열교환부 전단으로 합류시키는 합류라인과,
상기 분리된 액체성분을 상기 저장탱크로 복귀시키는 복귀라인을 더 포함하는 연료공급시스템.According to claim 1,
A gas-liquid separator provided at a rear end of the heat exchange unit of the re-liquefaction line and separating the fluid that has passed through the heat exchange unit into a gas component and a liquid component;
A merging line for merging the separated gas component to the front end of the heat exchange part of the first supply line;
The fuel supply system further comprising a return line for returning the separated liquid component to the storage tank.
KR1020160137309A 2016-10-21 2016-10-21 Fuel gas supply system KR102548330B1 (en)

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