KR102548329B1 - Fuel gas supply system - Google Patents

Fuel gas supply system Download PDF

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KR102548329B1
KR102548329B1 KR1020160121910A KR20160121910A KR102548329B1 KR 102548329 B1 KR102548329 B1 KR 102548329B1 KR 1020160121910 A KR1020160121910 A KR 1020160121910A KR 20160121910 A KR20160121910 A KR 20160121910A KR 102548329 B1 KR102548329 B1 KR 102548329B1
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South Korea
Prior art keywords
gas
pressure
boil
line
injection engine
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KR1020160121910A
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Korean (ko)
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KR20180033334A (en
Inventor
이동길
이호기
문성재
유호연
전준우
최병윤
최성훈
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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
    • 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
    • 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
    • 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

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Combustion & Propulsion (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

연료공급시스템을 개시한다. 본 발명의 실시 예에 따른 연료공급시스템은 액화가스 및 액화가스의 증발가스를 저장하는 저장탱크; 액화가스를 가압하는 고압펌프; 가압된 액화가스를 기화시키는 고압기화기; 증발가스를 압축시키는 압축기; 및 기화된 액화가스를 팽창시켜 생성한 에너지를 이용하여 압축기를 구동시키는 팽창기;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 high-pressure pump for pressurizing liquefied gas; A high-pressure vaporizer for vaporizing pressurized liquefied gas; Compressor for compressing boil-off gas; and an expander for driving a compressor using energy generated by expanding the vaporized liquefied gas.

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 공급할 수 있다.The fuel supply system described above may compress the boil-off gas supplied from the storage tank by the compression unit and supply the fuel to the engine.

그러나, 이러한 압축부는 에너지 소비가 높아 시간이 지날수록 가동효율이 떨어지는 문제점이 있다. 관련 기술로서, 한국공개특허 제10-2014-0052898호(2014.05.07. 공개)를 참조하기 바란다.However, such a compression unit has a problem in that its operation efficiency decreases over time due to high energy consumption. As a related technology, please refer to Korean Patent Publication No. 10-2014-0052898 (published on May 7, 2014).

한국공개특허 제10-2014-0052898호(2014.05.07. 공개)Korean Patent Publication No. 10-2014-0052898 (published on May 7, 2014)

본 발명의 실시 예는 운용 효율을 향상시킬 수 있는 연료공급시스템을 제공하고자 한다.An embodiment of the present invention is to provide a fuel supply system capable of improving operational efficiency.

본 발명의 일 측면에 따르면, 액화가스 및 상기 액화가스의 증발가스를 저장하는 저장탱크; 상기 액화가스를 가압하는 고압펌프; 상기 가압된 액화가스를 기화시키는 고압기화기; 상기 증발가스를 압축시키는 압축기; 및 상기 기화된 액화가스를 팽창시켜 생성한 에너지를 이용하여 상기 압축기를 구동시키는 팽창기;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 high-pressure pump pressurizing the liquefied gas; a high-pressure vaporizer for vaporizing the pressurized liquefied gas; a compressor for compressing the boil-off gas; and an expander for driving the compressor using energy generated by expanding the vaporized liquefied gas.

상기 저장탱크로부터 공급받은 액화가스를 상기 고압펌프 및 상기 고압기화기를 거쳐 고압분사엔진으로 공급하는 제1공급라인과, 상기 저장탱크로부터 공급받은 증발가스를 상기 압축기로 공급하는 압축라인과, 상기 압축기를 거친 상기 증발가스를 저압분사엔진으로 공급하는 제2공급라인과, 상기 제1공급라인의 상기 기화기 후단으로부터 분기되어 상기 기화된 액화가스 중 일부를 상기 팽창기로 공급하는 제1분기라인과, 상기 팽창기를 통해 팽창된 유체를 상기 제2공급라인의 상기 압축기 후단으로 합류시키는 합류라인을 더 포함할 수 있다.A first supply line for supplying the liquefied gas supplied from the storage tank to the high-pressure injection engine via the high-pressure pump and the high-pressure carburetor, a compression line for supplying the boil-off gas supplied from the storage tank to the compressor, and the compressor A second supply line for supplying the boil-off gas that has passed through to the low-pressure injection engine, a first branch line for supplying some of the vaporized liquefied gas to the expander by branching from the rear end of the vaporizer in the first supply line, A joining line for joining the fluid expanded through the expander to a rear end of the compressor of the second supply line may be further included.

상기 합류라인의 상기 팽창기 후단에 마련되며, 상기 저압분사엔진의 연료공급조건에 맞게 상기 팽창기를 통과한 유체의 압력을 감압시키는 감압밸브와, 상기 제2공급라인의 상기 합류 지점 후단에 마련되며, 상기 저압분사엔진의 연료공급조건에 맞게 상기 저압분사엔진으로 공급되는 유체를 가열하는 제1히터를 더 포함할 수 있다.A pressure reducing valve provided at the rear end of the expander of the confluence line and reducing the pressure of the fluid passing through the expander in accordance with the fuel supply conditions of the low pressure injection engine, provided at the end of the confluence point of the second supply line, The low-pressure injection engine may further include a first heater that heats the fluid supplied to the low-pressure injection engine in accordance with fuel supply conditions of the low-pressure injection engine.

상기 제2공급라인의 상기 압축기 전단으로부터 분기되어 상기 제2공급라인의 상기 제1히터 후단과 연결되며, 상기 저장탱크로부터 공급받은 증발가스 중 일부를 공급하는 제2분기라인과,A second branch line branched from the front end of the second supply line and connected to the rear end of the first heater of the second supply line, and supplying a part of boil-off gas supplied from the storage tank;

상기 제2분기라인에 마련되며, 상기 증발가스를 상기 저압가스분사엔진의 연료공급조건에 맞게 가열시키는 제2히터와, 상기 제2분기라인의 상기 제2히터 후단에 마련되어, 상기 가열된 증발가스를 저압가스분사엔진의 연료공급조건에 맞게 압축시키는 승압부와, 상기 저압가스분사엔진으로 공급되는 연료의 양이 부족한 경우, 상기 제2분기라인 상의 밸브를 열어, 상기 제2히터 및 상기 승압부를 거친 증발가스가 추가로 공급되도록 하는 제어부를 더 포함할 수 있다.A second heater provided in the second branch line to heat the boil-off gas in accordance with the fuel supply conditions of the low-pressure gas injection engine, and provided at a rear end of the second heater in the second branch line to heat the boil-off gas a pressure boosting unit for compressing the fuel supply condition of the low pressure gas injection engine, and when the amount of fuel supplied to the low pressure gas injection engine is insufficient, a valve on the second branch line is opened to connect the second heater and the pressure boosting unit. It may further include a control unit for supplying additional coarse evaporation gas.

본 발명의 실시 예에 따른 연료공급시스템은 운용 효율을 향상시킬 수 있다.The fuel supply system according to an embodiment of the present invention can improve operational efficiency.

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. 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 엔진으로 연료가스를 공급하며, 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. Referring to FIG. 1, a fuel supply system 100 according to an embodiment of the present invention supplies fuel gas to an engine, and various liquefied fuel carriers, liquefied fuel RVs (Regasification Vessel), container ships, general merchant ships, and LNG FPSOs. (Floating, Production, Storage and Off-loading), LNG Floating Storage and Regasification Unit (FSRU), etc.

구체적으로 연료공급시스템(100)은 액화가스 및 액화가스의 증발가스를 저장하는 저장탱크(110)와, 액화가스를 가압하는 고압펌프(120)와, 고압펌프(120)에 의해 가압된 액화가스를 기화시키는 고압기화기(130)와, 저장탱크(110)로부터 공급받은 증발가스를 압축시키는 압축기(140)와, 고압기화기(130)에 의해 기화된 액화가스를 팽창시켜 생성한 에너지를 이용하여 압축기(140)를 구동시키는 팽창기(150)를 포함한다.Specifically, the fuel supply system 100 includes a storage tank 110 for storing liquefied gas and boil-off gas of the liquefied gas, a high-pressure pump 120 for pressurizing the liquefied gas, and a liquefied gas pressurized by the high-pressure pump 120. The high-pressure vaporizer 130 for vaporizing, the compressor 140 for compressing the boil-off gas supplied from the storage tank 110, and the compressor using energy generated by expanding the liquefied gas vaporized by the high-pressure vaporizer 130 and expander 150 driving 140.

이때, 고압펌프(120)에 의해 가압된 액화가스를 고압기화기(130)를 통해 기화시킨 후 이를 압축기(140)를 구동시키는 팽창기(150)에 공급함으로써, 압축기(140) 단독으로 저장탱크(110)로부터 공급받은 증발가스를 승압시킬 때보다 에너지 절약 효과를 높일 수 있다.At this time, by vaporizing the liquefied gas pressurized by the high-pressure pump 120 through the high-pressure vaporizer 130 and then supplying it to the expander 150 that drives the compressor 140, the compressor 140 alone storage tank 110 ) can increase the energy saving effect compared to the case of boosting the boil-off gas supplied from.

또, 연료공급시스템(100)은 저장탱크(110)로부터 공급받은 액화가스를 고압펌프(120) 및 고압기화기(130)를 거쳐 고압분사엔진(E1)으로 공급하는 제1공급라인(L1)과, 저장탱크(110)로부터 공급받은 증발가스를 압축기(140)로 공급하는 압축라인(L2)과, 압축기(140)를 거친 증발가스를 저압분사엔진(E2)으로 공급하는 제2공급라인(L3)과, 제1공급라인(L1)의 기화기 후단으로부터 분기되어 고압기화기(130)에 의해 기화된 액화가스 중 일부를 팽창기(150)로 공급하는 제1분기라인(L4)과, 팽창기(150)를 통해 팽창된 유체를 제2공급라인(L3)의 압축기(140) 후단으로 합류시키는 합류라인(L5)을 포함할 수 있다.In addition, the fuel supply system 100 includes a first supply line L1 for supplying liquefied gas supplied from the storage tank 110 to the high-pressure injection engine E1 via the high-pressure pump 120 and the high-pressure carburetor 130, and , Compression line (L2) for supplying the boil-off gas supplied from the storage tank 110 to the compressor 140, and second supply line (L3) for supplying the boil-off gas passing through the compressor 140 to the low-pressure injection engine (E2) ), and a first branch line L4 branched from the rear end of the vaporizer of the first supply line L1 and supplying some of the liquefied gas vaporized by the high-pressure vaporizer 130 to the expander 150, and the expander 150 It may include a joining line (L5) for joining the fluid expanded through the second supply line (L3) to the rear end of the compressor 140.

또, 연료공급시스템(100)은 합류라인(L5)의 팽창기(150) 후단에 마련되며, 저압분사엔진(E2)의 연료공급조건에 맞게 팽창기(150)를 거친 유체의 압력을 감압시키는 감압밸브(160)와, 제2공급라인(L3)의 합류라인(L5)과의 합류 지점(A) 후단에 마련되며, 저압분사엔진(E2)의 연료공급조건에 맞게 저압분사엔진(E2)으로 공급되는 유체를 가열하는 제1히터(170)를 포함할 수 있다.In addition, the fuel supply system 100 is provided at the rear end of the expander 150 of the confluence line L5, and a pressure reducing valve for reducing the pressure of the fluid passing through the expander 150 in accordance with the fuel supply conditions of the low pressure injection engine E2. (160) and the second supply line (L3) are provided at the rear end of the joining point (A) of the joining line (L5), and are supplied to the low pressure injection engine (E2) according to the fuel supply conditions of the low pressure injection engine (E2). It may include a first heater 170 for heating the fluid to be.

또, 연료공급시스템(100)은 제2공급라인(L3)의 압축기(140) 전단으로부터 분기되어 제2공급라인(L3)의 제1히터(170) 후단과 연결되며, 저장탱크(110)로부터 공급된 증발가스 중 일부를 공급하는 제2분기라인(L6)과, 제2분기라인(L6)에 마련되며, 상술한 증발가스를 저압가스분사엔진(E2)의 연료공급조건에 맞게 가열시키는 제2히터(180)와, 제2분기라인(L6)의 제2히터(180) 후단에 마련되어, 제2히터(180)에 의해 가열된 증발가스를 저압가스분사엔진(E2)의 연료공급조건에 맞게 압축시키는 승압부(190)와, 저압가스분사엔진(E2)으로 공급되는 연료의 양이 부족한 경우, 제2분기라인(L6) 상의 밸브(V1)를 열어, 제2히터(180) 및 승압부(190)를 거친 증발가스가 추가로 공급되도록 하는 제어부(195)를 포함할 수 있다. 이하, 각 구성요소에 대해 구체적으로 설명한다.In addition, the fuel supply system 100 is branched from the front end of the compressor 140 of the second supply line L3 and connected to the rear end of the first heater 170 of the second supply line L3, and from the storage tank 110 A second branch line (L6) for supplying some of the supplied boil-off gas, and a system provided in the second branch line (L6) and heating the boil-off gas to meet the fuel supply conditions of the low-pressure gas injection engine (E2). A second heater 180 and the second heater 180 of the second branch line L6 are provided at the rear end, and the boil-off gas heated by the second heater 180 is supplied to the fuel supply condition of the low-pressure gas injection engine E2. When the amount of fuel supplied to the booster 190 for compression and the low-pressure gas injection engine E2 is insufficient, the valve V1 on the second branch line L6 is opened, and the second heater 180 and the pressure booster are opened. It may include a control unit 195 so that the evaporation gas that has passed through the unit 190 is additionally supplied. Hereinafter, each component will be described in detail.

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

저장탱크(110) 내부압력은 저장하는 액화가스가 LNG일 경우 대략 1bar로 유지되거나 연료공급조건을 고려해 그보다 높은 압력으로 유지될 수 있다. 저장탱크(110) 내부온도는 LNG의 액화상태 유지를 위해 대략 ―163℃도 정도로 유지될 수 있다. The internal pressure of the storage tank 110 may be maintained at approximately 1 bar when the liquefied gas to be stored is LNG, or may be maintained at a higher pressure in consideration of fuel supply conditions. The internal temperature of the storage tank 110 may be maintained at about −163° C. to maintain the liquefied state of LNG.

저장탱크(110)에 저장된 액화가스는 내부펌프(110)에 의해 토출되어 제1공급라인(L1)을 통해 고압펌프(120) 및 고압기화기(130)를 거쳐 고압분사엔진(E1)으로 공급된다. The liquefied gas stored in the storage tank 110 is discharged by the internal pump 110 and supplied to the high-pressure injection engine E1 through the high-pressure pump 120 and the high-pressure vaporizer 130 through the first supply line L1. .

고압분사엔진(E1)은 예컨대 ME-GI 엔진(Man B&W 사의 Gas Injection 엔진)을 포함할 수 있다.The high-pressure injection engine E1 may include, for example, an ME-GI engine (a Gas Injection engine manufactured by Man B&W).

고압펌프(120)는 저장탱크(110)에 저장된 액화가스를 제1공급라인(L1)을 통해 공급받아 고압분사엔진(E1)의 연료공급조건에 맞게 가압시킬 수 있다.The high-pressure pump 120 may receive the liquefied gas stored in the storage tank 110 through the first supply line L1 and pressurize it according to the fuel supply conditions of the high-pressure injection engine E1.

고압기화기(130)는 고압펌프(120)에 의해 가압된 액화가스를 기화시켜 기체로 변환시킨다.The high-pressure vaporizer 130 vaporizes the liquefied gas pressurized by the high-pressure pump 120 and converts it into gas.

압축기(140)는 팽창기(150)와 구동축(X)으로 연결되며, 팽창기(150)에 의해 생성된 에너지에 의해 구동된다. 압축기(140)는 저장탱크(110)에 저장된 증발가스를 압축라인(L2)을 통해 공급받아 압축시킨다. 압축기(140)는 저압가스분사엔진(E2)의 연료공급조건에 맞게 증발가스를 승압시킬 수 있다. 저압분사엔진(E2)은 DFDE(Dual Fuel Disel Electric) 엔진 등과 같은 저압(약 5~8bar) 분사엔진을 포함할 수 있다.The compressor 140 is connected to the expander 150 through a drive shaft X, and is driven by energy generated by the expander 150. The compressor 140 compresses the boil-off gas stored in the storage tank 110 when supplied through the compression line L2. The compressor 140 may increase the pressure of the boil-off gas according to the fuel supply conditions of the low-pressure gas injection engine E2. The low pressure injection engine E2 may include a low pressure (about 5 to 8 bar) injection engine such as a DFDE (Dual Fuel Disel Electric) engine.

팽창기(150)는 고압기화기(130)에 의해 기화된 액화가스 중 일부를 제1분기라인(L4)을 통해 공급받아 팽창시켜 에너지를 생성하고, 상술한 압축기(140)를 해당 에너지를 이용하여 구동시킨다.The expander 150 generates energy by receiving and expanding some of the liquefied gas vaporized by the high-pressure vaporizer 130 through the first branch line L4, and driving the compressor 140 described above using the corresponding energy. let it

감압밸브(160)는 합류라인(L5)에 마련되며, 저압분사엔진(E2)의 연료공급조건에 맞게 팽창기(150)를 거친 유체의 압력을 감압시키며, 예컨대 줄-톰슨(Joule Thomson) 밸브를 포함할 수 있다.The pressure reducing valve 160 is provided in the confluence line L5 and reduces the pressure of the fluid that has passed through the expander 150 in accordance with the fuel supply conditions of the low pressure injection engine E2. can include

제1히터(170)는 제2공급라인(L3)의 합류라인(L5)과의 합류 지점(A) 후단에 마련되며, 저압분사엔진(E2)의 연료공급조건에 맞게 압축기(140)를 거친 증발가스와 팽창기(150)를 통해 팽창된 유체의 혼합물을 가열시킨다.The first heater 170 is provided at the rear end of the joining point A of the joining line L5 of the second supply line L3, and passes through the compressor 140 to meet the fuel supply conditions of the low pressure injection engine E2. The mixture of the evaporation gas and the fluid expanded through the expander 150 is heated.

제2공급라인(L3)을 통해 저압가스분사엔진(E2)으로 공급되는 연료의 양이 부족한 경우, 제2분기라인(L6)을 통해 연료가 보충될 수 있다.When the amount of fuel supplied to the low pressure gas injection engine E2 through the second supply line L3 is insufficient, the fuel may be supplemented through the second branch line L6.

이때, 제2히터(180)는 저장탱크(110)에 저장된 증발가스 중 일부를 공급받아 저압가스분사엔진(E2)의 연료공급조건에 맞게 가열시키고, 승압부(190)는 가열된 증발가스를 저압가스분사엔진(E2)의 연료공급조건에 맞게 압축시킨다.At this time, the second heater 180 receives some of the boil-off gas stored in the storage tank 110 and heats it according to the fuel supply conditions of the low-pressure gas injection engine E2, and the booster 190 converts the heated boil-off gas It is compressed according to the fuel supply conditions of the low-pressure gas injection engine (E2).

이후, 승압부(190)에 의해 압축된 증발가스는 제2공급라인(L3)으로 합류되어 저압가스분사엔진(E2)의 연료로 사용될 수 있다. Thereafter, the boil-off gas compressed by the booster 190 is joined to the second supply line L3 and can be used as fuel for the low-pressure gas injection engine E2.

저압가스분사엔진(E2)의 연료로 사용되고 남은 유체는 보일러 등의 다른 수요처로 공급될 수도 있다.The remaining fluid used as fuel for the low-pressure gas injection engine E2 may be supplied to other consumers such as a boiler.

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: 고압펌프
130: 고압기화기 140: 압축기
150: 팽창기 160: 감압밸브
170: 제1히터 180: 제2히터
190: 승압부 195: 제어부
L1: 제1공급라인 L2: 압축라인
L3: 제2공급라인 L4: 제1분기라인
L5: 합류라인 L6: 제2분기라인 110: storage tank 120: high pressure pump
130: high pressure vaporizer 140: compressor
150: expander 160: pressure reducing valve
170: first heater 180: second heater
190: boosting unit 195: control unit
L1: first supply line L2: compression line
L3: 2nd supply line L4: 1st branch line
L5: confluence line L6: second branch line

Claims (4)

액화가스 및 상기 액화가스의 증발가스를 저장하는 저장탱크;
상기 액화가스를 가압하는 고압펌프;
상기 가압된 액화가스를 기화시키는 고압기화기;
상기 증발가스를 압축시키는 압축기; 및
상기 기화된 액화가스를 팽창시켜 생성한 에너지를 이용하여 상기 압축기를 구동시키는 팽창기;를 포함하고,
상기 저장탱크로부터 공급받은 액화가스를 상기 고압펌프 및 상기 고압기화기를 거쳐 고압분사엔진으로 공급하는 제1공급라인과,
상기 저장탱크로부터 공급받은 증발가스를 상기 압축기로 공급하는 압축라인과,
상기 제1공급라인의 상기 고압기화기 후단으로부터 분기되어 상기 기화된 액화가스 중 일부를 상기 팽창기로 공급하는 제1분기라인을 포함하는 연료공급시스템.A storage tank for storing liquefied gas and boil-off gas of the liquefied gas;
a high-pressure pump pressurizing the liquefied gas;
a high-pressure vaporizer for vaporizing the pressurized liquefied gas;
a compressor for compressing the boil-off gas; and
An expander for driving the compressor using energy generated by expanding the vaporized liquefied gas;
A first supply line for supplying the liquefied gas supplied from the storage tank to the high-pressure injection engine via the high-pressure pump and the high-pressure carburetor;
A compression line for supplying the boil-off gas supplied from the storage tank to the compressor;
and a first branch line branched from a rear end of the high-pressure vaporizer of the first supply line to supply some of the vaporized liquefied gas to the expander. 제1항에 있어서,
상기 압축기를 거친 상기 증발가스를 저압분사엔진으로 공급하는 제2공급라인과,
상기 팽창기를 통해 팽창된 유체를 상기 제2공급라인의 상기 압축기 후단으로 합류시키는 합류라인을 더 포함하는 연료공급시스템.According to claim 1,
A second supply line for supplying the boil-off gas that has passed through the compressor to a low-pressure injection engine;
and a joining line for merging the fluid expanded through the expander to a rear end of the compressor in the second supply line. 제2항에 있어서,
상기 합류라인의 상기 팽창기 후단에 마련되며, 상기 저압분사엔진의 연료공급조건에 맞게 상기 팽창기를 통과한 유체의 압력을 감압시키는 감압밸브와,
상기 제2공급라인의 상기 합류라인 후단에 마련되며, 상기 저압분사엔진의 연료공급조건에 맞게 상기 저압분사엔진으로 공급되는 유체를 가열하는 제1히터를 더 포함하는 연료공급시스템.According to claim 2,
a pressure reducing valve provided at a rear end of the expander in the confluence line and reducing the pressure of the fluid passing through the expander in accordance with fuel supply conditions of the low pressure injection engine;
and a first heater provided at a rear end of the joining line of the second supply line and heating fluid supplied to the low pressure injection engine in accordance with fuel supply conditions of the low pressure injection engine. 제3항에 있어서,
상기 제2공급라인의 상기 압축기 전단으로부터 분기되어 상기 제2공급라인의 상기 제1히터 후단과 연결되며, 상기 저장탱크로부터 공급받은 증발가스 중 일부를 공급하는 제2분기라인과,
상기 제2분기라인에 마련되며, 상기 증발가스를 상기 저압가스분사엔진의 연료공급조건에 맞게 가열시키는 제2히터와,
상기 제2분기라인의 상기 제2히터 후단에 마련되어, 상기 가열된 증발가스를 저압가스분사엔진의 연료공급조건에 맞게 압축시키는 승압부와,
상기 저압가스분사엔진으로 공급되는 연료의 양이 부족한 경우, 상기 제2분기라인 상의 밸브를 열어, 상기 제2히터 및 상기 승압부를 거친 증발가스가 추가로 공급되도록 하는 제어부를 더 포함하는 연료공급시스템.According to claim 3,
A second branch line branched from the front end of the second supply line and connected to the rear end of the first heater of the second supply line, and supplying a part of boil-off gas supplied from the storage tank;
a second heater provided in the second branch line and heating the boil-off gas in accordance with fuel supply conditions of the low-pressure gas injection engine;
a pressure boosting unit provided at a rear end of the second heater in the second branch line and compressing the heated boil-off gas in accordance with fuel supply conditions of the low-pressure gas injection engine;
and a control unit configured to open a valve on the second branch line to additionally supply boil-off gas that has passed through the second heater and the booster when the amount of fuel supplied to the low-pressure gas injection engine is insufficient. .
KR1020160121910A 2016-09-23 2016-09-23 Fuel gas supply system KR102548329B1 (en)

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