KR101672175B1 - Fuel gas supply system - Google Patents

Fuel gas supply system Download PDF

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KR101672175B1
KR101672175B1 KR1020150049990A KR20150049990A KR101672175B1 KR 101672175 B1 KR101672175 B1 KR 101672175B1 KR 1020150049990 A KR1020150049990 A KR 1020150049990A KR 20150049990 A KR20150049990 A KR 20150049990A KR 101672175 B1 KR101672175 B1 KR 101672175B1
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South Korea
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gas
refrigerant
supply line
liquefied
storage tank
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KR1020150049990A
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Korean (ko)
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KR20160120878A (en
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최병윤
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삼성중공업 주식회사
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    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/0002—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the fluid to be liquefied
    • F25J1/0022—Hydrocarbons, e.g. natural gas
    • F25J1/0025—Boil-off gases "BOG" from storages
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D19/02—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with gaseous fuels
    • F02D19/021—Control of components of the fuel supply system
    • F02D19/022—Control of components of the fuel supply system to adjust the fuel pressure, temperature or composition
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D19/02—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with gaseous fuels
    • F02D19/026—Measuring or estimating parameters related to the fuel supply system
    • F02D19/027—Determining the fuel pressure, temperature or volume flow, the fuel tank fill level or a valve position
    • 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
    • F02M21/023—Valves; Pressure or flow regulators in the fuel supply or return system
    • 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
    • F02M21/06—Apparatus for de-liquefying, e.g. by heating
    • 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
    • F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
    • F02M25/08—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture adding fuel vapours drawn from engine fuel reservoir
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/003—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production
    • F25J1/0047—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using an "external" refrigerant stream in a closed vapor compression cycle
    • F25J1/005—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using an "external" refrigerant stream in a closed vapor compression cycle by expansion of a gaseous refrigerant stream with extraction of work
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/003—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production
    • F25J1/0047—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using an "external" refrigerant stream in a closed vapor compression cycle
    • F25J1/0052—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using an "external" refrigerant stream in a closed vapor compression cycle by vaporising a liquid refrigerant stream
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/006—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the refrigerant fluid used
    • F25J1/007—Primary atmospheric gases, mixtures thereof
    • F25J1/0072—Nitrogen
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/006—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the refrigerant fluid used
    • F25J1/008—Hydrocarbons
    • F25J1/0087—Propane; Propylene
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/006—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the refrigerant fluid used
    • F25J1/008—Hydrocarbons
    • F25J1/009—Hydrocarbons with four or more carbon atoms
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
    • F25J1/0203—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process using a single-component refrigerant [SCR] fluid in a closed vapor compression cycle
    • F25J1/0204—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process using a single-component refrigerant [SCR] fluid in a closed vapor compression cycle as a single flow SCR cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
    • F25J1/0228—Coupling of the liquefaction unit to other units or processes, so-called integrated processes
    • F25J1/0229—Integration with a unit for using hydrocarbons, e.g. consuming hydrocarbons as feed stock
    • F25J1/023—Integration with a unit for using hydrocarbons, e.g. consuming hydrocarbons as feed stock for the combustion as fuels, i.e. integration with the fuel gas system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
    • F25J1/0243—Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
    • F25J1/0257—Construction and layout of liquefaction equipments, e.g. valves, machines
    • F25J1/0275—Construction and layout of liquefaction equipments, e.g. valves, machines adapted for special use of the liquefaction unit, e.g. portable or transportable devices
    • F25J1/0277—Offshore use, e.g. during shipping
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2210/00—Processes characterised by the type or other details of the feed stream
    • F25J2210/04—Mixing or blending of fluids with the feed stream
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2210/00—Processes characterised by the type or other details of the feed stream
    • F25J2210/60—Natural gas or synthetic natural gas [SNG]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2230/00—Processes or apparatus involving steps for increasing the pressure of gaseous process streams
    • F25J2230/30—Compression of the feed stream

Abstract

연료가스 공급시스템을 개시한다. 본 발명의 실시 예에 따른 연료가스 공급시스템은 액화가스 및 액화가스의 증발가스를 저장하는 저장탱크; 저장탱크로부터 공급되는 증발가스를 압축시키는 압축부; 압축부로 공급되는 증발가스의 온도를 조절하기 위하여, 압축된 증발가스와 저장탱크로부터 공급되는 증발가스를 열교환시키는 제1열교환부; 압축되어 열교환된 증발가스를 액화시키는 제2열교환부; 및 엔진으로 공급되는 액화된 증발가스의 양을 조절하는 분기부;를 포함한다.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 a liquefied gas and an evaporated gas of liquefied gas; A compression unit for compressing the evaporation gas supplied from the storage tank; A first heat exchanger for exchanging heat between the compressed evaporated gas and the evaporated gas supplied from the storage tank to regulate the temperature of the evaporated gas supplied to the compressed portion; A second heat exchanger for liquefying the compressed and heat-exchanged evaporated gas; And a branching portion for regulating the amount of the liquefied evaporated gas supplied to the engine.

Description

연료가스 공급시스템{FUEL GAS SUPPLY SYSTEM}FUEL GAS SUPPLY SYSTEM [0002]

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)의 규제가 강화됨에 따라 조선 및 해운업계에서는 기존 연료인 중유, 디젤유의 이용을 대신하여, 청정 에너지원인 천연가스를 선박의 연료가스로 이용하는 경우가 많아지고 있다.As IMO regulations on the emission of greenhouse gases and various air pollutants are strengthened, shipbuilding and marine industries are replacing the use of conventional oil and diesel oil with natural gas, which is a clean energy source, In many cases.

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 in fuel gas, is mainly stored as methane and is stored and transported in a liquefied gas state where the volume thereof is reduced to 1/600.

액화가스 운반선은 액화가스를 저장할 수 있도록 단열 처리된 저장탱크를 구비한다. 이러한 선박의 엔진은 저장탱크의 액화가스를 기화시켜 연료로 이용하거나, 저장탱크에서 자연적으로 발생하는 증발가스(Boiled Off Gas)를 연료로 이용한다. 여기서, 선박의 추진용 또는 선박의 발전용으로 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. The liquefied gas carrier has an insulated storage tank to store the liquefied gas. The engine of this ship uses vaporized liquefied gas from the storage tank as fuel or uses boiled off gas naturally occurring in the storage tank as fuel. Here, high pressure (about 5 to 8 bar) injection engine such as DFDE (Dual Fuel Disel Electric) engine and ME-GI engine (Man B & W's Gas Injection engine) 150 ~ 400 bar) injection engines are widely used. In addition, a medium pressure gas injection engine capable of combusting with medium pressure (about 16 to 18 bar) fuel gas has been developed and used.

한편, 엔진의 부하량이 커져 필요로 하는 연료공급량이 많아진 경우, 엔진이 요구하는 적정 유량을 맞추어 줄 필요성이 있다. 즉, 저장탱크에 저장된 액화가스가 많을 때는 저장탱크에서 자연적으로 발생하는 증발가스가 많기 때문에 이를 엔진의 연료로 공급하는 데에 지장이 없다. 그러나, 저장탱크에 저장된 액화가스가 적을 때는 자연적으로 발생하는 증발가스 양도 적기 때문에 이를 엔진의 연료로 공급하는 데에 충분하지 못하다. 더욱이 최근에는 저장탱크의 단열 성능이 증가하면서 증발가스 발생량이 줄어들었기 때문에 기존의 운용방식을 개선할 필요성이 있다.On the other hand, when the load of the engine is large and the required fuel supply amount is increased, there is a need to adjust the flow rate required by the engine. That is, when there are a lot of liquefied gas stored in the storage tank, since there are many evaporative gases naturally generated in the storage tank, there is no problem in supplying it as the fuel of the engine. However, when the amount of liquefied gas stored in the storage tank is small, the amount of evaporation gas generated naturally is small, so that it is not sufficient to supply the fuel to the engine. Furthermore, recently, the insulation performance of the storage tank has been increased, and the amount of evaporative gas generation has been reduced. Therefore, there is a need to improve the existing operation method.

또, 종래의 연료가스 공급시스템에는 저장탱크로부터 공급되는 증발가스를 엔진의 연료가스 공급압력 조건에 맞게 변경하기 위해 복수의 압축기를 포함하는 압축부를 공개하고 있다. 이때, 압축부의 효율을 최적 상태로 유지시켜 전체 시스템을 효과적으로 운용할 필요성이 있으나, 이에 대한 구체적인 제어 기술에 대한 구현이 미흡한 실정이다. 상술한 내용과 관련된 종래 기술로서 한국공개특허 제10-2012-0103421호(2012.09.19. 공개)를 참조하기 바란다.In addition, the conventional fuel gas supply system discloses a compression unit including a plurality of compressors for changing the evaporation gas supplied from the storage tank to the fuel gas supply pressure condition of the engine. At this time, there is a need to effectively operate the entire system by maintaining the efficiency of the compression unit at an optimal state, but the actual implementation of the control technique is insufficient. As a related art related to the above-mentioned contents, please refer to Korean Patent Laid-Open No. 10-2012-0103421 (published on September 19, 2012).

한국공개특허 제10-2012-0103421호(2012.09.19. 공개)Korean Patent Laid-Open No. 10-2012-0103421 (published on September 19, 2012)

본 발명의 실시 예는 엔진으로 연료가스를 공급하는 시스템이 최적의 상태에서 효율적으로 동작할 수 있도록 하고, 엔진이 필요로 하는 연료공급량에 맞게 유량을 공급할 수 있는 연료가스 공급시스템을 제공하고자 한다.An embodiment of the present invention is intended to provide a fuel gas supply system capable of efficiently operating the system for supplying fuel gas to the engine in an optimal state and supplying the flow rate to meet the fuel supply amount required by the engine.

본 발명의 일 측면에 따르면, 액화가스 및 상기 액화가스의 증발가스를 저장하는 저장탱크; 상기 저장탱크로부터 공급되는 증발가스를 압축시키는 압축부; 상기 압축부로 공급되는 증발가스의 온도를 조절하기 위하여, 상기 압축된 증발가스와 상기 저장탱크로부터 공급되는 증발가스를 열교환시키는 제1열교환부; 상기 압축되어 열교환된 증발가스를 액화시키는 제2열교환부; 및 엔진으로 공급되는 상기 액화된 증발가스의 양을 조절하는 분기부;를 포함하는 연료가스 공급시스템이 제공될 수 있다.According to an aspect of the present invention, there is provided a storage tank for storing a liquefied gas and an evaporated gas of the liquefied gas; A compression unit for compressing the evaporation gas supplied from the storage tank; A first heat exchanger for exchanging heat between the compressed evaporated gas and the evaporated gas supplied from the storage tank to regulate the temperature of the evaporated gas supplied to the compressed portion; A second heat exchanger for liquefying the compressed and heat-exchanged evaporated gas; And a branching portion for regulating the amount of the liquefied vaporized gas supplied to the engine.

상기 저장탱크에 저장된 증발가스를 상기 제1열교환부를 거쳐 압축부로 공급하는 증발가스공급라인과, 상기 압축부 후단과 상기 제1열교환부를 연결하며, 상기 압축된 증발가스를 상기 제1열교환부로 공급하는 온도조절라인을 더 포함할 수 있다.An evaporation gas supply line for supplying the evaporation gas stored in the storage tank to the compression unit via the first heat exchange unit and a second evaporation gas supply line for connecting the rear end of the compression unit to the first heat exchange unit and supplying the compressed evaporation gas to the first heat exchange unit And may further include a temperature control line.

상기 제1열교환부, 상기 제2열교환부 및 상기 분기부를 연결하는 재액화라인과, 상기 분기부와 상기 엔진을 연결하는 연료공급라인과, 상기 연료공급라인으로 공급되는 액화된 증발가스를 가열시키는 히터와, 상기 분기부와 상기 저장탱크를 연결하는 회수라인과, 상기 회수라인에 마련되며, 상기 분기부를 거쳐 상기 저장탱크로 공급되는 액화된 증발가스를 감압시키는 감압밸브를 더 포함하되, 상기 분기부는 상기 제2열교환부를 거쳐 액화된 증발가스를 상기 연료공급라인 또는 상기 회수라인으로 분배할 수 있다.A refueling line connecting the first heat exchanging unit, the second heat exchanging unit, and the branching unit; a fuel supply line connecting the branching unit and the engine; and a heating unit for heating the liquefied evaporating gas supplied to the fuel supply line Further comprising a pressure reducing valve that is provided in the recovery line and reduces the pressure of the liquefied evaporated gas supplied to the storage tank through the branching section, May distribute the evaporated gas liquefied through the second heat exchanger to the fuel supply line or the recovery line.

상기 저장탱크로부터 공급되는 액화가스를 상기 증발가스공급라인으로 합류시키는 액화가스공급라인과, 상기 액화가스공급라인에 마련되며, 상기 저장탱크로부터 공급되는 액화가스를 기화시키는 기화기를 더 포함할 수 있다.A liquefied gas supply line for joining the liquefied gas supplied from the storage tank to the evaporation gas supply line and a vaporizer provided in the liquefied gas supply line for vaporizing the liquefied gas supplied from the storage tank .

상기 연료공급라인에 마련되고, 상기 엔진으로 공급되는 증발가스의 양 또는 압력을 측정하는 측정부와, 상기 측정된 증발가스의 양 또는 압력 값에 따라, 상기 액화가스공급라인을 통해, 상기 저장탱크로부터 공급받은 액화가스를 기화시켜 상기 증발가스공급라인으로 합류시키도록 제어하는 제어부를 더 포함할 수 있다.A fuel supply line for supplying the fuel to the engine; a measuring unit provided in the fuel supply line for measuring an amount or pressure of the evaporated gas supplied to the engine; And a control unit for controlling the vaporization of the liquefied gas supplied from the evaporation gas supply line and joining the vaporized gas to the evaporation gas supply line.

상기 제2열교환부는 상기 압축되어 열교환된 증발가스와 냉매 간 열교환을 수행하며, 상기 냉매는 냉매 순환라인을 통해 순환방식으로 상기 제2열교환부에 공급되고, 상기 냉매 순환라인에는 냉매를 압축하는 냉매압축기, 상기 냉매압축기에서 압축된 냉매를 1차 냉각하는 냉매냉각기, 및 상기 냉매냉각기에서 냉각된 후 상기 제2열교환부에서 2차 냉각된 냉매를 팽창시키는 냉매팽창기가 마련될 수 있다.The second heat exchanging unit performs heat exchange between the compressed heat exchanged vapor gas and the refrigerant, and the refrigerant is supplied to the second heat exchanging unit in a circulating manner through the refrigerant circulating line, and the refrigerant circulating line is connected to the refrigerant circulating line A refrigerant cooler for first cooling the refrigerant compressed in the refrigerant compressor, and a refrigerant inflator for expanding the refrigerant that is secondarily cooled in the second heat exchanger after being cooled in the refrigerant cooler may be provided.

본 발명의 실시 예에 따른 연료가스 공급시스템은 엔진으로 연료가스를 공급하는 시스템이 최적의 상태에서 효율적으로 동작할 수 있도록 하고, 엔진이 필요로 하는 연료공급량에 맞게 유량을 공급할 수 있다.The fuel gas supply system according to the embodiment of the present invention can efficiently operate the system for supplying the fuel gas to the engine in an optimal state and supply the flow rate to meet the fuel supply amount required by the engine.

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 can be clearly understood by those skilled in the art from the description of the claims.

도 1은 본 발명의 실시 예에 따른 연료가스 공급시스템을 나타낸다.1 shows a fuel gas 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 described below are provided by way of example so that those skilled in the art will be able to fully understand the spirit of the present invention. The present invention is not limited to the embodiments described below, but may be embodied in other forms. In order to clearly explain the present invention, parts not related to the description are omitted from the drawings, and the width, length, thickness, etc. of the components may be exaggerated for convenience. Like reference numerals designate like elements throughout the specification.

도 1을 참조하면, 본 발명의 실시 예에 따른 연료가스 공급시스템(100)은 엔진(E)으로 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 gas supply system 100 according to an embodiment of the present invention supplies fuel gas to an engine E, and supplies various types of liquefied fuel carriers, liquefied fuel RVs (Regasification Vessels) , LNG FPSO (Floating, Production, Storage and Off-loading), LNG FSRU (Floating Storage and Regasification Unit) and so on.

구체적으로 연료가스 공급시스템(100)은 액화가스 및 액화가스의 증발가스를 저장하는 저장탱크(10)와, 저장탱크(10)로부터 공급된 증발가스를 압축시키는 압축부(20)와, 압축부(20)에 의해 압축된 증발가스와 저장탱크(10)로부터 공급된 증발가스 간 열교환을 수행하여, 압축부(20)로 공급되는 증발가스의 온도를 설정온도에 맞게 변경하는 제1열교환부(30)와, 제1열교환부(30)를 거친 증발가스와 냉매 간 열교환을 수행하여, 제1열교환부(30)를 거친 증발가스를 액화시키는 제2열교환부(40)와, 엔진(E)이 필요로 하는 연료공급량에 따라 제2열교환부(40)를 거쳐 엔진(E) 쪽으로 공급되는 액화된 증발가스의 양을 조절하는 분기부(50)를 포함한다. 엔진(E)은 예컨대 ME-GI 엔진(E)(Man B&W 사의 Gas Injection 엔진)과 같은 고압가스 분사엔진일 수 있다.Specifically, the fuel gas supply system 100 includes a storage tank 10 for storing evaporative gas of liquefied gas and liquefied gas, a compression section 20 for compressing the evaporated gas supplied from the storage tank 10, A first heat exchanger (not shown) for performing heat exchange between the evaporated gas compressed by the evaporator 20 and the evaporated gas supplied from the storage tank 10 to change the temperature of the evaporated gas supplied to the compressor 20 to a set temperature A second heat exchange unit 40 for performing heat exchange between the evaporated gas and the refrigerant through the first heat exchanging unit 30 to liquefy the evaporated gas through the first heat exchanging unit 30, And a branching unit 50 for regulating the amount of liquefied evaporated gas supplied to the engine E via the second heat exchanging unit 40 according to the required fuel supply amount. The engine E may be a high-pressure gas injection engine such as an ME-GI engine E (Man B & W Gas Injection engine).

또, 연료가스 공급시스템(100)은 저장탱크(10)로부터 공급된 증발가스를 제1열교환부(30)를 거쳐 압축부(20)로 공급하는 증발가스공급라인(L1)과, 압축부(20) 후단과 제1열교환부(30)를 연결하며, 압축부(20)에 의해 압축된 증발가스를 제1열교환부(30)로 공급하는 온도조절라인(L2)과, 제1열교환부(30), 제2열교환부(40) 및 분기부(50)를 연결하는 재액화라인(L3)과, 분기부(50)와 엔진(E)을 연결하는 연료공급라인(L4)과, 연료공급라인(L4)에 마련되며, 분기부(50)를 거쳐 엔진(E) 쪽으로 공급되는 유체를 가열시키는 히터(60)와, 분기부(50)와 저장탱크(10)를 연결하는 회수라인(L5)과, 회수라인(L5)에 마련되어 분기부(50)를 거쳐 저장탱크(10)에 저장되는 유체를 감압시키는 감압밸브(70)를 포함할 수 있다.The fuel gas supply system 100 includes an evaporation gas supply line L1 for supplying the evaporation gas supplied from the storage tank 10 to the compression unit 20 via the first heat exchange unit 30, A temperature control line L2 connecting the rear end of the first heat exchanging unit 20 to the first heat exchanging unit 30 and supplying the evaporated gas compressed by the compressing unit 20 to the first heat exchanging unit 30, A refueling line L3 for connecting the first heat exchanging unit 30 to the second heat exchanging unit 40 and the branching unit 50 and a fuel supply line L4 for connecting the branching unit 50 and the engine E, A heater 60 provided in the line L4 for heating the fluid supplied to the engine E via the branching section 50 and a recovery line L5 for connecting the branching section 50 and the storage tank 10, And a decompression valve 70 provided in the recovery line L5 to decompress the fluid stored in the storage tank 10 via the branching section 50. [

또, 연료가스 공급시스템(100)은 제1열교환부(30)와 압축부(20) 사이의 증발가스공급라인(L1)과 저장탱크(10)를 연결하며, 저장탱크(10)로부터 공급된 액화가스를 증발가스공급라인(L1)으로 합류시키는 액화가스공급라인(L6)과, 액화가스공급라인(L6)에 마련되어 저장탱크(10)로부터 공급된 액화가스를 기화시키는 기화기(80)와, 연료공급라인(L4)에 마련되고, 엔진(E) 쪽으로 공급되는 유체의 양 및 압력 중 하나 이상을 측정하는 측정부(90)와, 측정부(90)에 의해 측정된 값과 설정값을 비교하여, 엔진(E)이 필요로 하는 연료공급량이 연료공급라인(L4)을 통해 공급되는 유량보다 많다고 판단된 경우, 액화가스공급라인(L6)을 통해 저장탱크(10)로부터 액화가스가 공급되도록 하여 엔진(E)이 필요로 하는 연료공급량의 부족분을 보충시키는 제어부(95)를 포함할 수 있다.The fuel gas supply system 100 connects the evaporation gas supply line L1 between the first heat exchanging unit 30 and the compression unit 20 to the storage tank 10, A liquefied gas supply line L6 for joining the liquefied gas to the evaporation gas supply line L1, a vaporizer 80 provided in the liquefied gas supply line L6 to vaporize the liquefied gas supplied from the storage tank 10, A measuring section 90 provided in the fuel supply line L4 for measuring at least one of the amount and the pressure of the fluid supplied to the engine E, and a controller 90 for comparing the set value with the value measured by the measuring section 90 So that the liquefied gas is supplied from the storage tank 10 through the liquefied gas supply line L6 when it is determined that the fuel supply amount required by the engine E is larger than the flow rate supplied through the fuel supply line L4 And a control unit 95 for supplementing the shortage of the fuel supply amount required by the engine E. [

도 1에 도시한 바와 같이, 저장탱크(10)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. 저장탱크(10)는 단열상태를 유지하면서 연료를 액화상태로 저장하는 멤브레인형 탱크, SPB형 탱크 등을 포함할 수 있다. 저장탱크(10) 내부압력은 저장하는 액화가스가 LNG일 경우 1bar로 유지되거나 연료공급조건을 고려해 그보다 높은 압력으로 유지될 수 있다. 저장탱크(10) 내부온도는 LNG의 액화상태 유지를 위해 ―163℃도 정도로 유지될 수 있다. 저장탱크(10)에 저장된 액화가스의 증발가스는 증발가스공급라인(L1)을 통해 제1열교환부(30)를 거쳐 압축부(20)로 공급된다. 1, the liquefied gas stored in the storage tank 10 may be any one of LNG (Liquefied Natural Gas), LPG (Liquefied Petroleum Gas), DME (Dimethylether) and Ethane But is not limited thereto. The storage tank 10 may include a membrane type tank, an SPB type tank, and the like which store the fuel in a liquefied state while maintaining an adiabatic state. The internal pressure of the storage tank 10 can be maintained at 1 bar when the liquefied gas to be stored is LNG or can be maintained at a higher pressure in consideration of the fuel supply conditions. The internal temperature of the storage tank 10 may be maintained at about -163 DEG C to maintain the liquefied state of the LNG. The evaporated gas of the liquefied gas stored in the storage tank 10 is supplied to the compression section 20 via the first heat exchange section 30 through the evaporation gas supply line L1.

압축부(20)는 교대로 배치된 복수의 압축기(22)와 냉각기(미도시)를 포함하고, 저장탱크(10)로부터 공급된 액화가스의 증발가스를 압축시킨다. 압축부(20)는 유입되는 유체의 온도에 따라 효율이 변하는 데, 예컨대 ―15℃정도에서 최적의 효율을 나타낸다. The compression section 20 includes a plurality of alternately arranged compressors 22 and a cooler (not shown), and compresses the evaporated gas of the liquefied gas supplied from the storage tank 10. The efficiency of the compression unit 20 varies depending on the temperature of the fluid to be introduced. For example, the compression unit 20 exhibits an optimum efficiency at about -15 ° C.

압축부(20)가 최적의 상태에서 동작할 수 있도록 제1열교환부(30)는 압축부(20)에 의해 압축된 증발가스를 온도조절라인(L2)을 통해 공급받아 저장탱크(10)로부터 공급된 증발가스와 열교환을 수행하여, 증발가스공급라인(L1)을 통해 압축부(20)로 공급되는 증발가스의 온도를 설정온도에 맞게 변경한다. 그리고, 압축부(20)에 의해 압축된 증발가스는 제1열교환부(30)를 거쳐 재액화라인(L3)으로 공급되고, 제2열교환부(40)에서 냉매와 열교환을 수행하여 액화된다.The first heat exchanging unit 30 is supplied with the evaporation gas compressed by the compressing unit 20 through the temperature control line L2 so as to be operated from the storage tank 10 Performs heat exchange with the supplied evaporation gas, and changes the temperature of the evaporation gas supplied to the compression section (20) through the evaporation gas supply line (L1) according to the set temperature. The evaporated gas compressed by the compression unit 20 is supplied to the re-liquefaction line L3 through the first heat exchanging unit 30 and is heat-exchanged with the refrigerant in the second heat exchanging unit 40 to be liquefied.

제2열교환부(40)에서 사용되는 냉매로는 질소, 프로판, 프로필렌, 암모니아, 부탄, 부타디엔 또는 이들의 혼합물이 사용될 수 있으며, 냉매는 냉매 순환라인(L7)을 통해 순환방식으로 제2열교환부(40)에 공급될 수 있다. 냉매 순환라인(L7)에는 냉매를 압축하는 냉매압축기(12), 냉매압축기(12)에서 압축된 냉매를 1차 냉각하는 냉매냉각기(14), 및 냉매냉각기(14)에서 냉각된 후 제2열교환부(40)에서 2차 냉각된 냉매를 팽창시키는 냉매팽창기(16)가 마련될 수 있다.As the refrigerant used in the second heat exchanging part 40, nitrogen, propane, propylene, ammonia, butane, butadiene or a mixture thereof may be used. The refrigerant is circulated through the refrigerant circulating line L7, (Not shown). The refrigerant circulation line L7 includes a refrigerant compressor 12 for compressing the refrigerant, a refrigerant cooler 14 for first cooling the refrigerant compressed in the refrigerant compressor 12, and a second heat exchange A refrigerant inflator 16 may be provided for expanding the refrigerant that has been secondarily cooled in the first compartment 40.

도 1에서는 냉매압축기(12) 및 냉매냉각기(14)를 하나씩 도시하였으나, 다른 예에서 냉매압축기(12) 및 냉매냉각기(14)는 복수 개로 마련되어 교대로 배치될 수 있다. 냉매냉각기(14)는 해수, 냉각수, 또는 공기를 냉열원으로 사용하여 냉매를 냉각할 수 있다. 냉매팽창기(16)에서 요구되는 입구 온도까지 냉매가 충분히 냉각되도록, 냉매냉각기(14)를 거친 냉매는 제2열교환부(40)를 통과하면서 더 냉각된다. 그리고, 냉매는 냉매팽창기(16)를 통과하며 저압 및 극저온 상태가 되고, 제2열교환부(40)에서 재액화라인(L3)을 통해 공급된 증발가스와 열교환을 수행할 수 있다. In FIG. 1, the refrigerant compressor 12 and the refrigerant cooler 14 are shown one by one, but in another example, the refrigerant compressor 12 and the refrigerant cooler 14 may be provided in plural and alternately arranged. The coolant cooler 14 can cool the coolant by using seawater, cooling water, or air as a heat source. The refrigerant having passed through the refrigerant cooler 14 is further cooled while passing through the second heat exchanging section 40 so that the refrigerant is sufficiently cooled to the inlet temperature required by the refrigerant inflator 16. [ Then, the refrigerant passes through the refrigerant inflator 16 to be in a low-pressure and cryogenic state, and can perform heat exchange with the evaporated gas supplied through the redistribution line L3 in the second heat exchanging unit 40. [

분기부(50)는 엔진(E)이 필요로 하는 연료공급량에 따라 제2열교환부(40)를 거친 유체를 연료공급라인(L4) 및 회수라인(L5) 중 하나 이상으로 분배한다. 즉, 분기부(50)는 제2열교환부(40)를 거친 유체 중 엔진(E)이 필요로 하는 양만큼 연료공급라인(L4)을 통해 엔진(E)으로 보내고 나머지는 회수라인(L5)을 통해 저장탱크(10)로 보낼 수 있다. 분기부(50)는 예컨대, 3-way 밸브를 포함할 수 있다.The branching section 50 distributes the fluid passing through the second heat exchanging section 40 to at least one of the fuel supply line L4 and the recovery line L5 according to the fuel supply amount required by the engine E. [ That is, the branching section 50 sends the amount of fluid passing through the second heat exchanging section 40 to the engine E through the fuel supply line L4 by an amount required by the engine E, To the storage tank (10). The branching section 50 may comprise, for example, a 3-way valve.

분기부(50)에 의해 연료공급라인(L4)로 공급된 유체는 히터(60)에 의해 가열된 후, 엔진(E)의 연료로 사용된다.The fluid supplied to the fuel supply line L4 by the branch portion 50 is heated by the heater 60 and then used as fuel for the engine E. [

또, 분기부(50)에 의해 회수라인(L5)으로 보내진 유체는 감압밸브(70)에 의해 감압시킨 후 저장탱크(10)로 저장할 수 있다.The fluid sent to the recovery line L5 by the branching unit 50 may be decompressed by the pressure reducing valve 70 and then stored in the storage tank 10.

측정부(90)는 연료공급라인(L4)에 설치되어 연료공급라인(L4)을 통해 엔진(E)으로 공급되는 유체의 압력 및 연료공급라인(L4)을 통해 엔진(E)으로 공급되는 유체의 양 중 하나 이상을 측정할 수 있다. 예컨대, 엔진(E)이 증발가스를 많이 끌어다 쓰는 경우, 연료공급라인(L4)을 통해 엔진(E)으로 공급되는 증발가스의 압력은 측정부(90)에 의해 낮게 측정된다. The measuring section 90 is provided on the fuel supply line L4 and controls the pressure of the fluid supplied to the engine E through the fuel supply line L4 and the pressure of the fluid supplied to the engine E through the fuel supply line L4 Of at least one of < / RTI > For example, when the engine E draws a lot of evaporation gas, the pressure of the evaporation gas supplied to the engine E through the fuel supply line L4 is measured low by the measuring section 90.

상술한 분기부(50)는 측정부(90)에 의해 측정된 증발가스의 압력이 설정압력(설정값)보다 낮은 경우, 엔진(E)이 필요로 하는 연료공급량이 실제 엔진(E)으로 공급되는 유량보다 많다고 판단할 수 있다. 마찬가지로 분기부(50)는 측정부(90)에 의해 측정된 연료공급라인(L4)을 통해 엔진(E)으로 공급되는 유량이 엔진(E)이 필요로 하는 연료공급량(설정값)보다 적은 경우, 엔진(E)이 필요로 하는 연료공급량이 실제 엔진(E)으로 공급되는 유량보다 많다고 판단할 수 있다. 분기부(50)는 엔진(E)이 필요로 하는 연료공급량이 실제 엔진(E)으로 공급되는 유량보다 많다고 판단되면, 회수라인(L5)으로 공급되는 유체의 양을 줄이고, 연료공급라인(L4)을 통해 엔진(E) 쪽으로 공급되는 유체의 양을 증가시킬 수 있다. The branching section 50 described above supplies the fuel supply amount required by the engine E to the actual engine E when the pressure of the evaporation gas measured by the measuring section 90 is lower than the set pressure It is determined that the flow rate is greater than the flow rate. Likewise, when the flow rate supplied to the engine E through the fuel supply line L4 measured by the measuring unit 90 is smaller than the fuel supply amount (set value) required by the engine E, , It can be determined that the fuel supply amount required by the engine E is larger than the flow rate supplied to the actual engine E. [ The branching section 50 reduces the amount of the fluid supplied to the recovery line L5 and reduces the amount of the fluid supplied to the fuel supply line L4 when the fuel supply amount required by the engine E is judged to be larger than the flow rate supplied to the actual engine E. [ The amount of the fluid supplied to the engine E can be increased.

또, 선박 정박 시, 분기부(50)는 제2열교환부(40)를 거쳐 전량 액화된 유체를 회수라인(L5)으로 보내어, 감압밸브(70)에 의해 감압시킨 후 저장탱크(10)로 저장할 수 있다. 이때, 회수라인(L5)을 통해 저장탱크(10)에 저장되는 유체는 저장탱크(10) 내 증발가스 발생을 억제시키기 위해 회수라인(L5) 끝단에 마련된 분사장치(15)에 의해 저장탱크(10) 내측에 분사될 수 있다.In addition, at the time of berthing of the ship, the branching section 50 sends the fluid liquefied in the total amount through the second heat exchanging section 40 to the recovery line L5, decompressed by the pressure reducing valve 70, Can be stored. The fluid stored in the storage tank 10 through the recovery line L5 is discharged to the storage tank 10 by the spray device 15 provided at the end of the recovery line L5 in order to suppress the generation of the evaporative gas in the storage tank 10. [ 10).

한편, 엔진(E)의 부하량이 커질수록 필요한 연료공급량은 늘어나게 된다. 저장탱크(10)로부터 공급된 증발가스의 양이 엔진(E)이 필요로 하는 연료공급량보다 적을 경우, 엔진(E)이 필요로 하는 연료공급량에 따라 유량을 맞출 필요가 있다.On the other hand, as the load of the engine E increases, the required fuel supply amount increases. When the amount of evaporated gas supplied from the storage tank 10 is smaller than the amount of fuel required by the engine E, it is necessary to adjust the flow rate according to the fuel supply amount required by the engine E.

이를 위해 제어부(95)는 상술한 측정부(90)에 의해 측정된 값과 설정값을 비교하여, 엔진(E)이 필요로 하는 연료공급량이 연료공급라인(L4)을 통해 공급되는 유량보다 많다고 판단된 경우, 액화가스공급라인(L6)을 통해 액화가스를 추가로 공급할 수 있다. 예컨대, 제어부(95)는 측정부(90)에 의해 측정된 증발가스의 압력과 설정압력(설정값) 또는 측정부(90)에 의해 측정된 유량과 엔진(E)이 필요로 하는 연료공급량(설정값)을 비교하여, 비교한 결과값을 기초로 연료공급량이 연료공급라인(L4)을 통해 공급되는 유량보다 많다고 판단된 경우, 액화가스공급라인(L6)을 통해 액화가스를 추가로 공급할 수 있다.To this end, the control unit 95 compares the value measured by the measuring unit 90 with the set value and determines that the fuel supply amount required by the engine E is greater than the flow rate supplied through the fuel supply line L4 If it is judged, it is possible to further supply the liquefied gas through the liquefied gas supply line L6. For example, the control unit 95 determines whether or not the pressure of the evaporation gas measured by the measuring unit 90, the set pressure (set value) or the flow rate measured by the measuring unit 90 and the fuel supply amount If it is determined that the fuel supply amount is larger than the flow rate supplied through the fuel supply line L4 based on the comparison result, the liquefied gas can be further supplied through the liquefied gas supply line L6 have.

액화가스공급라인(L6)을 통해 액화가스를 추가로 공급하기 위해, 제어부(95)는 액화가스공급라인(L6)에 설치된 밸브(V1)를 개방하고, 저장탱크(10) 내측에 구비된 송출펌프(12)를 동작시켜 저장탱크(10)에 저장된 액화가스를 액화가스공급라인(L6)을 통해 내보내고, 기화기(80)의 동작을 제어하여 저장탱크(10)로부터 공급받은 액화가스를 기화시켜 증발가스공급라인(L1)으로 합류시킨다. 이때, 상술한 분기부(50)는 엔진(E)이 필요로 하는 연료공급량에 따라 제2열교환부(40)를 거친 유체를 연료공급라인(L4)으로 분배시킨다. 분기부(50)는 자체 제어방식에 의해 제어되거나, 다른 예에서 제어부(95)에 의해 제어되도록 구성될 수 있다. 상술한 분기부(50), 제어부(95) 및 측정부(90)는 서로 유무선 통신을 수행할 수 있으며, 각종 제어데이터, 측정값, 설정값 등을 송수신할 수 있다. The control unit 95 opens the valve V1 provided in the liquefied gas supply line L6 to feed the liquefied gas through the liquefied gas supply line L6, The pump 12 is operated to discharge the liquefied gas stored in the storage tank 10 through the liquefied gas supply line L6 and control the operation of the vaporizer 80 to vaporize the liquefied gas supplied from the storage tank 10 And joined to the evaporation gas supply line L1. At this time, the branched section 50 distributes the fluid passing through the second heat exchanging section 40 to the fuel supply line L4 in accordance with the fuel supply amount required by the engine E. The branching section 50 may be controlled by a self-control method, or may be configured to be controlled by a control section 95 in another example. The branching unit 50, the control unit 95, and the measuring unit 90 can perform wired / wireless communication with each other and transmit / receive various control data, measurement values, set values, and the like.

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.The foregoing has shown and described specific embodiments. However, it is to be understood that the present invention is not limited to the above-described embodiment, and various changes and modifications may be made without departing from the scope of the technical idea of the present invention described in the following claims It will be possible.

10: 저장탱크 20: 압축부
30: 제1열교환부 40: 제2열교환부
50: 분기부 60: 히터
70: 감압밸브 80: 기화기
90: 측정부 95: 제어부
L1: 증발가스공급라인 L2: 온도조절라인
L3: 재액화라인 L4: 연료공급라인
L5: 회수라인 L6: 액화가스공급라인
L7: 냉매 순환라인10: storage tank 20: compression section
30: first heat exchanger 40: second heat exchanger
50: branch portion 60: heater
70: Reducing valve 80: Vaporizer
90: Measuring section 95: Control section
L1: Evaporation gas supply line L2: Temperature control line
L3: Re-liquefaction line L4: Fuel supply line
L5: recovery line L6: liquefied gas supply line
L7: Refrigerant circulation line

Claims (6)

액화가스 및 상기 액화가스의 증발가스를 저장하는 저장탱크;
상기 저장탱크로부터 공급되는 증발가스를 압축시키는 압축부;
상기 압축부로 공급되는 증발가스의 온도를 조절하기 위하여, 상기 압축된 증발가스와 상기 저장탱크로부터 공급되는 증발가스를 열교환시키는 제1열교환부;
상기 제1열교환부를 거쳐 열교환된 상기 압축된 증발가스를 액화시키는 제2열교환부;
엔진으로 공급되는 상기 액화된 증발가스의 양을 조절하는 분기부;
상기 저장탱크에 저장된 증발가스를 상기 제1열교환부를 거쳐 상기 압축부로 공급하는 증발가스공급라인;
상기 저장탱크로부터 공급되는 액화가스를 상기 증발가스공급라인의 상기 압축부 전단으로 합류시키는 액화가스공급라인;
상기 액화가스공급라인에 마련되며, 상기 저장탱크로부터 공급되는 액화가스를 기화시키는 기화기;
상기 제2열교환부를 거쳐 상기 분기부로 유입된 유체를 상기 엔진으로 공급하는 연료공급라인;
상기 연료공급라인에 마련되고, 상기 엔진으로 공급되는 유체의 양을 측정하는 측정부;
상기 측정된 유체의 양을 기초로, 상기 액화가스공급라인을 통해 상기 증발가스공급라인으로 합류되는 액화가스의 양을 제어하는 제어부;를 포함하되,
상기 제어부는 상기 엔진이 필요로 하는 연료공급량이 상기 측정된 유체의 양보다 많다고 판단될 경우, 상기 액화가스공급라인을 개방시키고 상기 기화기를 동작시켜 상기 증발가스공급라인의 상기 압축부 전단으로 상기 기화된 액화가스를 추가로 공급하고, 상기 분기부는 상기 엔진이 필요로 하는 연료공급량에 따라 상기 제2열교환부를 거친 유체를 상기 연료공급라인을 통해 상기 엔진 쪽으로 분배하는 연료가스 공급시스템.A storage tank for storing a liquefied gas and an evaporation gas of the liquefied gas;
A compression unit for compressing the evaporation gas supplied from the storage tank;
A first heat exchanger for exchanging heat between the compressed evaporated gas and the evaporated gas supplied from the storage tank to regulate the temperature of the evaporated gas supplied to the compressed portion;
A second heat exchanger for liquefying the compressed evaporated gas heat-exchanged through the first heat exchanger;
A branching section for regulating the amount of the liquefied vaporized gas supplied to the engine;
An evaporation gas supply line for supplying evaporation gas stored in the storage tank to the compression unit via the first heat exchange unit;
A liquefied gas supply line which joins the liquefied gas supplied from the storage tank to the upstream side of the compression section of the evaporation gas supply line;
A vaporizer provided in the liquefied gas supply line for vaporizing the liquefied gas supplied from the storage tank;
A fuel supply line for supplying the fluid introduced into the branch portion via the second heat exchanger to the engine;
A measuring unit provided in the fuel supply line for measuring an amount of fluid supplied to the engine;
And a control unit for controlling an amount of the liquefied gas which is merged into the evaporation gas supply line through the liquefied gas supply line based on the measured amount of the fluid,
Wherein the control unit opens the liquefied gas supply line and operates the vaporizer so that the evaporation gas is supplied to the upstream side of the compression unit of the evaporation gas supply line when the fuel supply amount required by the engine is determined to be greater than the measured fluid amount, And the branch portion distributes the fluid passing through the second heat exchange portion to the engine via the fuel supply line in accordance with a fuel supply amount required by the engine. 제1항에 있어서,
상기 압축부 후단과 상기 제1열교환부를 연결하며, 상기 압축된 증발가스를 상기 제1열교환부로 공급하는 온도조절라인을 더 포함하는 연료가스 공급시스템.The method according to claim 1,
Further comprising a temperature regulation line connecting the rear end of the compression section and the first heat exchange section and supplying the compressed evaporation gas to the first heat exchange section. 제1항에 있어서,
상기 제1열교환부, 상기 제2열교환부 및 상기 분기부를 연결하는 재액화라인과,
상기 연료공급라인으로 공급되는 액화된 증발가스를 가열시키는 히터와,
상기 분기부와 상기 저장탱크를 연결하는 회수라인과,
상기 회수라인에 마련되며, 상기 분기부를 거쳐 상기 저장탱크로 공급되는 액화된 증발가스를 감압시키는 감압밸브를 더 포함하되,
상기 분기부는 상기 제2열교환부를 거쳐 액화된 증발가스를 상기 연료공급라인 또는 상기 회수라인으로 분배하는 연료가스 공급시스템.The method according to claim 1,
A re-liquefaction line connecting the first heat exchanger, the second heat exchanger and the branch,
A heater for heating the liquefied evaporative gas supplied to the fuel supply line,
A recovery line connecting the branch portion and the storage tank,
And a decompression valve provided in the recovery line for decompressing the liquefied vapor gas supplied to the storage tank through the branching unit,
And the branching portion distributes the evaporated gas liquefied through the second heat exchanging portion to the fuel supply line or the recovery line. 삭제delete 삭제delete 제1항에 있어서,
상기 제2열교환부는 상기 압축되어 열교환된 증발가스와 냉매 간 열교환을 수행하며,
상기 냉매는 냉매 순환라인을 통해 순환방식으로 상기 제2열교환부에 공급되고,
상기 냉매 순환라인에는 냉매를 압축하는 냉매압축기, 상기 냉매압축기에서 압축된 냉매를 1차 냉각하는 냉매냉각기, 및 상기 냉매냉각기에서 냉각된 후 상기 제2열교환부에서 2차 냉각된 냉매를 팽창시키는 냉매팽창기가 마련되는 연료가스 공급시스템.The method according to claim 1,
The second heat exchanger performs heat exchange between the compressed and heat-exchanged evaporated gas and the refrigerant,
The refrigerant is supplied to the second heat exchanging unit in a circulating manner through the refrigerant circulation line,
The refrigerant circulation line includes a refrigerant compressor for compressing the refrigerant, a refrigerant refrigerant for first cooling the refrigerant compressed in the refrigerant compressor, and a refrigerant refrigerant for expanding the refrigerant that is secondarily cooled in the refrigerant- Fuel gas supply system in which an expander is provided.
KR1020150049990A 2015-04-09 2015-04-09 Fuel gas supply system KR101672175B1 (en)

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KR101996808B1 (en) * 2017-10-20 2019-07-08 삼성중공업 주식회사 Reliquefaction system
KR102196129B1 (en) * 2019-12-27 2020-12-29 김성훈 Direct injection apparatus of bi-fuel having dual injector

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KR20200075953A (en) * 2018-12-18 2020-06-29 대우조선해양 주식회사 System and Method of Treating Boil-Off Gas for Vessels
KR102542461B1 (en) 2018-12-18 2023-06-15 한화오션 주식회사 System and Method of Treating Boil-Off Gas for Vessels

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