KR20200055935A - Fuel Supply System and Method for Vessel - Google Patents

Fuel Supply System and Method for Vessel Download PDF

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KR20200055935A
KR20200055935A KR1020180139629A KR20180139629A KR20200055935A KR 20200055935 A KR20200055935 A KR 20200055935A KR 1020180139629 A KR1020180139629 A KR 1020180139629A KR 20180139629 A KR20180139629 A KR 20180139629A KR 20200055935 A KR20200055935 A KR 20200055935A
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South Korea
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gas
engine
storage tank
liquefied gas
discharged
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KR1020180139629A
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Korean (ko)
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KR102601307B1 (en
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김선진
이승철
김원석
정혜민
최진호
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대우조선해양 주식회사
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Priority to KR1020180139629A priority Critical patent/KR102601307B1/en
Priority to SG11202012486VA priority patent/SG11202012486VA/en
Priority to JP2020570005A priority patent/JP7253575B2/en
Priority to CN201980059674.XA priority patent/CN112672954B/en
Priority to PCT/KR2019/015577 priority patent/WO2020101403A1/en
Publication of KR20200055935A publication Critical patent/KR20200055935A/en
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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
    • B63B25/14—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed pressurised
    • 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
    • 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
    • F02M21/0209—Hydrocarbon fuels, e.g. methane or acetylene
    • F02M21/0212—Hydrocarbon fuels, e.g. methane or acetylene comprising at least 3 C-Atoms, e.g. liquefied petroleum gas [LPG], propane or butane
    • 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
    • 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
    • F17C5/00—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures
    • F17C5/02—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures for filling with liquefied gases
    • 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
    • F17C7/00—Methods or apparatus for discharging liquefied, solidified, or compressed gases from pressure vessels, not covered by another subclass
    • F17C7/02—Discharging liquefied gases
    • 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
    • F17C2265/01—Purifying the fluid
    • F17C2265/015—Purifying the fluid by separating
    • F17C2265/017—Purifying the fluid by separating different phases of a same fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2265/00—Effects achieved by gas storage or gas handling
    • F17C2265/06—Fluid distribution
    • F17C2265/066—Fluid distribution for feeding engines for propulsion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2270/00—Applications
    • F17C2270/01—Applications for fluid transport or storage
    • F17C2270/0102—Applications for fluid transport or storage on or in the water
    • F17C2270/0105—Ships
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/30—Use of alternative fuels, e.g. biofuels

Abstract

Disclosed is a system for supplying fuel for a ship. The system for supplying fuel for a ship includes: a first decompressing device (50) decompressing the surplus fuel discharged from an engine (E); and a vapor and liquid separator (60) separating fluid in a vapor and liquid mixed state decompressed by the first decompressing device (50) into a vapor phase and a liquid phase. The gas in a gas state separated by the vapor and liquid separator (60) is restored to a storage tank (T). After the surplus liquefied gas is supplied to the engine (E) as the fuel, the fuel remaining after being used in the engine (E) is discharged from the engine (E) to be supplied to the first decompressing device (50).

Description

선박용 연료 공급 시스템 및 방법{Fuel Supply System and Method for Vessel}Fuel supply system and method for vessels

본 발명은 비압축성 유체를 엔진의 연료로 사용하는 선박의 연료 공급 시스템 및 방법에 관한 것이다.The present invention relates to a fuel supply system and method for a ship using an incompressible fluid as fuel for an engine.

일반적으로, 석유가스는 생산지에서 저온으로 액화된 액화석유가스(Liquefied Petroleum Gas, 이하 LPG라 함)의 상태로 만들어진 후 LPG 운반선에 의해 목적지까지 원거리에 걸쳐 수송된다.In general, petroleum gas is made in the state of liquefied petroleum gas (Liquefied Petroleum Gas, hereinafter referred to as LPG) liquefied at a low temperature in the production area and then transported over a long distance to the destination by an LPG carrier.

종래 LPG 운반선의 엔진용 연료로서는 HFO(Heavy Fuel Oil) 또는 MDO(Marine Diesel Oil)와 같은 오일 연료를 사용하여 왔다. 또한, 종래 LPG 운반선의 화물로서 LPG는 저장탱크에 저장되어 운반되는데, 저장탱크에서 발생한 BOG(Boil Off Gas)는 재액화 플랜트에서 재액화된 후 다시 저장탱크로 이송되어 저장되었다.Conventional LPG carriers have used oil fuels such as heavy fuel oil (HFO) or marine diesel oil (MDO) as engine fuel. In addition, LPG as a cargo of a conventional LPG carrier is stored and transported in a storage tank, and BOG (Boil Off Gas) generated in the storage tank is re-liquefied in a reliquefaction plant and then transferred to a storage tank for storage.

이와 같이 종래 LPG 운반선에서는 연료와 화물이 이원화된 시스템에 의해 사용 또는 처리되었고, 화물로서 저장탱크에 저장된 LPG를 연료로 사용할 수 있는 엔진 등의 수단은 존재하지 않았다.As described above, in the conventional LPG carrier, fuel and cargo were used or processed by a dual system, and there was no means such as an engine capable of using LPG stored in a storage tank as fuel as cargo.

최근, 화물로서 저장탱크에 저장된 LPG를 엔진의 연료로 공급하는 방안에 대한 관심이 높아지고 있다.Recently, interest in a method of supplying LPG stored in a storage tank as cargo as fuel for an engine has increased.

엔진으로부터 배출된 잉여 연료가 저장탱크로 복귀되면서 액체 상태의 액화가스가 감압되며 다량의 플래시 가스(flash gas)가 발생하게 된다.As the excess fuel discharged from the engine is returned to the storage tank, the liquid liquefied gas is decompressed and a large amount of flash gas is generated.

본 발명은 엔진으로부터 배출된 잉여 연료가 저장탱크로 복귀되면서 발생하는 플래시 가스에 의해 저장탱크 내부 압력이 증가되는 것을 방지하기 위해, 엔진으로부터 배출된 후 감압되어 기액혼합상태(two phase)가 된 잉여 연료를 기액분리기에 의해 분리한 후, 기액분리기에 의해 분리된 유체를 저장탱크로 보내는 선박용 연료 공급 시스템 및 방법을 제공하고자 한다.In the present invention, to prevent the internal pressure of the storage tank from being increased by the flash gas generated when the surplus fuel discharged from the engine is returned to the storage tank, it is depressurized after being discharged from the engine to become a two-phase gas-liquid mixture. An object of the present invention is to provide a ship fuel supply system and method for separating a fuel by a gas-liquid separator and then sending the fluid separated by the gas-liquid separator to a storage tank.

상기 목적을 달성하기 위한 본 발명의 일 측면에 따르면, 엔진(E)에서 배출된 잉여 연료를 감압시키는 제1 감압장치(50); 및 상기 제1 감압장치(50)에 의해 감압된 기액혼합상태의 유체를 기체상과 액체상으로 분리하는 기액분리기(60);를 포함하며, 상기 기액분리기(60)에 의해 분리된 기체 상태의 가스는 저장탱크(T)로 복귀되고, 상기 엔진(E)에 과잉의 액화가스를 연료로 공급한 후, 상기 엔진(E)에서 사용되고 남은 연료가 상기 엔진(E)으로부터 배출되어 상기 제1 감압장치(50)로 공급되는, 선박용 연료 공급 시스템이 제공된다.According to an aspect of the present invention for achieving the above object, the first pressure reducing device 50 for reducing the excess fuel discharged from the engine (E); And a gas-liquid separator 60 for separating the gas-liquid mixed fluid decompressed by the first pressure-reducing device 50 into a gaseous phase and a liquid phase, wherein the gaseous gas separated by the gas-liquid separator 60 is included. Is returned to the storage tank (T), and after supplying excess liquefied gas to the engine (E) as fuel, the remaining fuel used in the engine (E) is discharged from the engine (E) and the first decompression device A ship fuel supply system, supplied at 50, is provided.

상기 기액분리기(60)에 의해 분리된 액화가스는 상기 저장탱크(T)로부터 배출된 액화가스와 합류될 수 있다.The liquefied gas separated by the gas-liquid separator 60 may be combined with the liquefied gas discharged from the storage tank T.

상기 제1 감압장치(50)는 상기 저장탱크(T)로부터 배출된 액화가스의 압력까지 액화가스를 감압시킬 수 있다.The first decompression device 50 may decompress the liquefied gas to the pressure of the liquefied gas discharged from the storage tank T.

상기 선박용 연료 공급 시스템은, 상기 기액분리기(60)에 의해 분리된 가스를 감압시킨 후 상기 저장탱크(T)로 보내는 제2 감압장치(70)를 더 포함할 수 있다.The ship fuel supply system may further include a second decompression device 70 that decompresses the gas separated by the gas-liquid separator 60 and sends it to the storage tank T.

상기 기액분리기(60)에 의해 분리된 액화가스는 상기 저장탱크(T) 내부로 보내질 수 있다.Liquefied gas separated by the gas-liquid separator 60 may be sent to the storage tank (T).

상기 제1 감압장치(50)는 상기 저장탱크(T) 내부 압력까지 액화가스를 감압시킬 수 있다.The first decompression device 50 may decompress the liquefied gas to the pressure inside the storage tank T.

상기 선박용 연료 공급 시스템은, 상기 저장탱크(T) 내부에 설치되어, 액화가스를 펌핑하여 상기 저장탱크(T) 외부로 배출시키는 제1 펌프(10)를 더 포함할 수 있다.The ship fuel supply system may further include a first pump 10 installed inside the storage tank T and pumping liquefied gas to discharge it to the outside of the storage tank T.

상기 선박용 연료 공급 시스템은, 상기 저장탱크(T)로부터 배출된 후 상기 엔진(E)으로 공급되는 액화가스를 상기 엔진(E)의 요구 압력으로 펌핑하는 제2 펌프(20)를 더 포함할 수 있다.The ship fuel supply system may further include a second pump 20 pumping liquefied gas discharged from the storage tank T to the engine E to a required pressure of the engine E. have.

상기 기액분리기(60)에 의해 분리된 액체 상태의 액화가스는, 상기 제2 펌프(20) 상류로 보내져 상기 저장탱크(T)로부터 배출되는 액화가스와 합류되어 다시 상기 엔진(E)의 연료로 사용될 수 있다.The liquefied gas in the liquid state separated by the gas-liquid separator 60 is sent to the upstream of the second pump 20 and merges with the liquefied gas discharged from the storage tank T, and is again used as fuel for the engine E. Can be used.

상기 선박용 연료 공급 시스템은, 상기 기액분리기(60)에 의해 분리된 액화가스가 배출되는 라인 상에 설치되는 밸브(V)를 더 포함할 수 있다.The ship fuel supply system may further include a valve V installed on a line through which the liquefied gas separated by the gas-liquid separator 60 is discharged.

상기 선박용 연료 공급 시스템은, 상기 저장탱크(T)로부터 배출된 후 상기 엔진(E)으로 공급되는 액화가스를 상기 엔진(E)의 요구 온도로 가열시키는 가열기(40)를 더 포함할 수 있다.The ship fuel supply system may further include a heater 40 for heating the liquefied gas supplied to the engine E to the required temperature of the engine E after being discharged from the storage tank T.

상기 목적을 달성하기 위한 본 발명의 다른 측면에 따르면, 1) 엔진(E)에 과잉의 액화가스를 연료로 공급한 후, 상기 엔진(E)에서 사용되고 남은 연료가 상기 엔진(E)으로부터 배출되는 단계; 2) 상기 1)단계에서 상기 엔진(E)으로부터 배출된 잉여 연료를 감압시키는 단계; 3) 상기 2)단계에서 감압된 기액혼합상태의 유체를 기체상과 액체상으로 분리하는 단계; 및 4) 상기 3)단계에서 분리된 기체 상태의 가스를 저장탱크(T)로 복귀시키는 단계;를 포함하고, 상기 저장탱크(T)로부터 배출된 액화가스는 상기 엔진(E)에 연료로 공급되는, 선박용 연료 공급 방법이 제공된다.According to another aspect of the present invention for achieving the above object, 1) after supplying excess liquefied gas to the engine E as fuel, the remaining fuel used in the engine E is discharged from the engine E step; 2) reducing the excess fuel discharged from the engine (E) in step 1); 3) separating the fluid in the gas-liquid mixed state decompressed in step 2) into a gas phase and a liquid phase; And 4) returning the gas in the gas phase separated in step 3) to the storage tank T. The liquefied gas discharged from the storage tank T is supplied to the engine E as fuel. Provided is a ship fuel supply method.

본 발명의 일 실시예에 의하면, 저장탱크로 기액혼합상태의 유체를 공급하는 것이 아니라 기액분리기에 의해 분리된 기체 상태의 가스만을 공급하므로, 액체 상태의 액화가스가 감압되며 플래시 가스가 발생할 우려가 없어, 저장탱크 내부 압력을 용이하게 제어할 수 있다.According to an embodiment of the present invention, since the gas in the gas-liquid separator is not supplied to the storage tank, but only the gas in the gas phase separated by the gas-liquid separator, the liquefied gas in the liquid state is depressurized and there is a risk of generating flash gas. No, the pressure inside the storage tank can be easily controlled.

또한, 본 발명의 일 실시예에 의하면, 저장탱크로 기액혼합상태의 유체를 공급하는 것이 아니라, 기액분리기에 의해 분리된 기체 상태의 가스와 액체 상태의 액화가스를 각각 별도로 공급하고, 액체 상태의 액화가스는 저장탱크의 내부 압력까지 감압된 상태이므로, 액체 상태의 액화가스가 감압되며 플래시 가스가 발생할 우려가 없어, 저장탱크 내부 압력을 용이하게 제어할 수 있다.In addition, according to an embodiment of the present invention, instead of supplying the liquid in the gas-liquid mixed state to the storage tank, the gaseous gas separated by the gas-liquid separator and the liquefied gas in the liquid state are separately supplied, and the liquid state Since the liquefied gas is depressurized to the internal pressure of the storage tank, the liquefied gas in the liquid state is decompressed and there is no fear of flash gas, so that the pressure inside the storage tank can be easily controlled.

뿐만 아니라, 본 발명의 일 실시예에 의하면, 기액분리기에 의해 분리된 액체 상태의 액화가스를 저장탱크로부터 배출된 액화가스와 합류시켜 제2 펌프로 보내므로, 제1 펌프가 압축시킬 액화가스의 유량을 줄일 수 있어, 제1 펌프의 소비 전력(power consumption)을 줄일 수 있는 장점이 있다.In addition, according to an embodiment of the present invention, since the liquefied gas in the liquid state separated by the gas-liquid separator is combined with the liquefied gas discharged from the storage tank and sent to the second pump, the first pump is used to compress the liquefied gas to be compressed. Since the flow rate can be reduced, there is an advantage of reducing the power consumption of the first pump.

도 1은 본 발명의 바람직한 제1 실시예에 따른 선박용 연료 공급 시스템의 개략도이다.
도 2는 본 발명의 바람직한 제2 실시예에 따른 선박용 연료 공급 시스템의 개략도이다.1 is a schematic diagram of a marine fuel supply system according to a first preferred embodiment of the present invention.
2 is a schematic diagram of a marine fuel supply system according to a second preferred embodiment of the present invention.

이하 첨부한 도면을 참조하여 본 발명의 바람직한 실시예에 대한 구성 및 작용을 상세히 설명하면 다음과 같다. 하기 실시예는 여러 가지 다른 형태로 변형될 수 있으며, 본 발명의 범위가 하기 실시예에 한정되는 것은 아니다.Hereinafter, the configuration and operation of the preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. The following examples may be modified in various other forms, and the scope of the present invention is not limited to the following examples.

도 1은 본 발명의 바람직한 제1 실시예에 따른 선박용 연료 공급 시스템의 개략도이다.1 is a schematic diagram of a marine fuel supply system according to a first preferred embodiment of the present invention.

도 1을 참조하면, 본 실시예의 선박용 연료 공급 시스템은, 엔진(E)에서 배출된 잉여 연료를 감압시키는 제1 감압장치(50) 및 제1 감압장치(50)에 의해 감압된 기액혼합상태의 유체를 기체상과 액체상으로 분리하는 기액분리기(60)를 포함한다.Referring to FIG. 1, the ship fuel supply system of the present embodiment is in a gas-liquid mixed state depressurized by the first decompression device 50 and the first decompression device 50 for decompressing excess fuel discharged from the engine E. And a gas-liquid separator 60 that separates the fluid into a gas phase and a liquid phase.

본 실시예의 저장탱크(T)는 액화가스를 저장하며, 저장탱크(T)로부터 배출된 액화가스는 엔진(E)에 연료로 공급된다. 저장탱크(T) 내부에는, 액화가스를 펌핑하여 저장탱크(T) 외부로 배출시키는 제1 펌프(10)가 설치될 수 있다.The storage tank T of this embodiment stores liquefied gas, and the liquefied gas discharged from the storage tank T is supplied as fuel to the engine E. Inside the storage tank T, a first pump 10 for pumping liquefied gas and discharging it to the outside of the storage tank T may be installed.

본 실시예에 의하면, 엔진(E)에 과잉의 액화가스를 연료로 공급한 후, 엔진(E)에서 사용되고 남은 연료가 엔진(E)으로부터 배출되면, 엔진(E)으로부터 배출된 잉여 연료를 제1 감압장치(50)로 보낸다.According to this embodiment, after supplying excess liquefied gas to the engine E as fuel, when the remaining fuel used in the engine E is discharged from the engine E, excess fuel discharged from the engine E is removed. 1 Send to the pressure reducing device (50).

기체 상태의 압축성 유체(Compressible Fluid)를 엔진(E)의 연료로 공급하는 경우에는, 연료공급라인(F1)을 엔진(E)에서 요구되는 양보다 조금 더 높은 압력으로 채워 놓으면, 압축성 유체인 연료가 어느 정도 압축된 상태로 연료공급라인(F1)에 존재하면서 엔진(E)이 갑자기 많은 양의 연료를 필요로 하는 경우에도 바로 연료를 공급할 수 있으므로, 엔진(E)의 부하가 변동되어도 별다른 문제 없이 안정적으로 연료를 공급할 수 있다.In the case of supplying the gaseous compressible fluid as fuel for the engine E, when the fuel supply line F1 is filled with a pressure slightly higher than the amount required by the engine E, the fuel is a compressible fluid. Is present in the fuel supply line (F1) in a compressed state to some extent, and even when the engine (E) suddenly needs a large amount of fuel, it can supply fuel immediately, so even if the load of the engine (E) fluctuates, it is a special problem. It can supply fuel stably.

그러나, 액체 상태의 비압축성 유체(Incompressible Fluid)를 엔진(E)의 연료로 공급하는 경우에는, 비압축성 유체는 압력을 가하여도 부피의 변화가 미미하므로, 연료공급라인(F1)을 엔진(E)에서 요구되는 양보다 조금 더 높은 압력으로 채워 놓는 방법을 사용할 수 없다.However, in the case of supplying the incompressible fluid in a liquid state as fuel of the engine E, the volume of the incompressible fluid is small even when applying pressure, so the fuel supply line F1 is removed from the engine E. A method of filling with a pressure slightly higher than the required amount cannot be used.

그런데, 엔진(E)이 갑자기 많은 양의 연료를 필요로 하는 경우에 엔진(E)이 필요로 하는 양의 연료를 공급하지 못하게 되면, 엔진(E)에 캐비테이션(Cavitation) 등이 발생할 수 있다.However, when the engine E suddenly fails to supply the required amount of fuel when the engine E requires a large amount of fuel, cavitation or the like may occur in the engine E.

따라서, 본 발명의 발명자들은 엔진(E)에 공급되는 연료가 부족한 경우를 발생시키는 것보다는, 차라리 엔진이 필요한 양보다 더 많은 양의 연료를 공급하는 것이 더 낫다고 판단하였다.Therefore, the inventors of the present invention have determined that it is better to supply a larger amount of fuel than the engine needs, rather than generating a case where the fuel supplied to the engine E is insufficient.

본 실시예에 의하면, 엔진(E)에서 요구되는 양의 액화가스만을 엔진(E)으로 공급하는 것이 아니라, 엔진(E)의 부하 변동을 수용할 수 있는 충분한 양의 액화가스를 전부 엔진(E)에 공급하고, 엔진(E)에서 사용되지 못한 잉여 액화가스는 엔진(E)으로부터 배출시킨다.According to the present embodiment, not only the amount of liquefied gas required by the engine E is supplied to the engine E, but a sufficient amount of liquefied gas capable of accommodating the load fluctuation of the engine E is entirely used by the engine E ), And the excess liquefied gas that is not used in the engine E is discharged from the engine E.

따라서, 본 발명의 의하면, 액체 상태의 비압축성 유체를 엔진의 연료로 공급하는 경우에도, 안정적으로 엔진에 연료를 공급할 수 있다.Therefore, according to the present invention, it is possible to stably supply fuel to the engine even when the liquid incompressible fluid is supplied as fuel to the engine.

본 실시예에 의하면, 엔진(E)의 요구량의 대략 100% 내지 120%의 액화가스를 엔진(E)에 공급할 수 있고, 바람직하게는 엔진(E)의 요구량의 대략 110%의 액화가스를 엔진(E)에 공급할 수 있다.According to this embodiment, the liquefied gas of approximately 100% to 120% of the required amount of the engine E can be supplied to the engine E, preferably the liquefied gas of approximately 110% of the required amount of the engine E (E).

본 실시예의 제1 감압장치(50)로는 유체를 감압시키는 다양한 수단이 적용될 수 있으며, 바람직하게는 제1 감압장치(50)는 줄-톰슨 밸브 등의 팽창밸브일 수 있다.Various means for depressurizing the fluid may be applied to the first pressure reducing device 50 of this embodiment, and preferably, the first pressure reducing device 50 may be an expansion valve such as a Joule-Thomson valve.

본 실시예의 기액분리기(60)는, 엔진(E)으로부터 배출된 후 제1 감압장치(50)에 의해 감압되어 기액혼합상태가 된 잉여 연료를 기체 상태의 가스와 액체 상태의 액화가스로 분리한다.The gas-liquid separator 60 of this embodiment separates the surplus fuel that has been decompressed by the first decompression device 50 and discharged from the engine E into a gas-liquid mixed state into a gaseous gas and a liquid liquefied gas. .

기액분리기(60)에 의해 분리된 기체 상태의 가스는 저장탱크(T)로 복귀되고, 기액분리기(60)에 의해 분리된 액체 상태의 액화가스는, 저장탱크(T)로부터 배출되는 액화가스와 합류되어 다시 엔진(E)의 연료로 사용될 수 있다.The gaseous gas separated by the gas-liquid separator 60 is returned to the storage tank T, and the liquid gas separated by the gas-liquid separator 60 is liquefied gas discharged from the storage tank T. It can be joined and used again as fuel for the engine E.

기액분리기(60)에 의해 분리된 액화가스가 배출되는 라인 상에는 밸브(V)가 설치되어, 기액분리기(60) 내부에 모인 액화가스의 수위가 일정 범위 내로 유지되도록 밸브(V)의 개폐가 조절될 수 있다.A valve V is installed on a line where the liquefied gas separated by the gas-liquid separator 60 is discharged, so that the opening and closing of the valve V is adjusted so that the level of the liquefied gas collected inside the gas-liquid separator 60 is maintained within a predetermined range. Can be.

본 실시예의 선박용 연료 공급 시스템은, 저장탱크(T)로부터 배출된 후 엔진(E)으로 공급되는 액화가스를 엔진(E)의 요구 압력으로 펌핑하는 제2 펌프(20), 및 저장탱크(T)로부터 배출된 후 엔진(E)으로 공급되는 액화가스를 엔진(E)의 요구 온도로 가열시키는 가열기(40) 중 하나 이상을 더 포함할 수 있다.The ship fuel supply system of the present embodiment, the second pump 20 pumping the liquefied gas supplied to the engine E after being discharged from the storage tank T to the required pressure of the engine E, and the storage tank T It may further include one or more of the heater 40 for heating the liquefied gas supplied to the engine (E) after being discharged from) to the required temperature of the engine (E).

본 실시예의 가열기(40)는 액화가스를 대략 40℃ 내지 50℃로 가열할 수 있고, 바람직하게는 대략 45℃로 가열할 수 있다.The heater 40 of this embodiment can heat the liquefied gas to approximately 40 ° C to 50 ° C, and preferably heat it to approximately 45 ° C.

기액분리기(60)에 의해 분리된 액화가스가 저장탱크(T)로부터 배출된 액화가스와 합류되는 경우, 제1 감압장치(50)는 저장탱크(T)로부터 배출된 액화가스의 압력(즉, 합류 지점의 압력. 제1 펌프(10)를 포함하는 경우 제1 펌프(10)에 의해 펌핑된 액화가스의 압력, 제2 펌프(20)를 포함하는 경우 제2 펌프(20) 상류 압력)까지 액화가스를 감압시킨 후에 기액분리기(60)로 보내는 것이 바람직하다. 또한, 기액분리기(60)에 의해 분리된 기체 상태의 가스는 제2 감압장치(70)에 의해 저장탱크(T) 내부 압력까지 한번 더 감압된 후 저장탱크(T)로 보내는 것이 바람직하다.When the liquefied gas separated by the gas-liquid separator 60 is combined with the liquefied gas discharged from the storage tank T, the first decompression device 50 is the pressure of the liquefied gas discharged from the storage tank T (that is, Pressure at the confluence point, up to the pressure of the liquefied gas pumped by the first pump 10 when the first pump 10 is included, and the pressure upstream of the second pump 20 when the second pump 20 is included) It is preferable to send the liquefied gas to the gas-liquid separator 60 after depressurizing. In addition, it is preferable that the gas in the gas phase separated by the gas-liquid separator 60 is depressurized once more to the pressure inside the storage tank T by the second pressure reducing device 70 and then sent to the storage tank T.

본 실시예의 제2 감압장치(70)로는 유체를 감압시키는 다양한 수단이 적용될 수 있으며, 바람직하게는 제2 감압장치(70)는 줄-톰슨 밸브 등의 팽창밸브일 수 있다. 또한, 제2 감압장치(70)에 의해 감압된 유체의 압력은 대략 15 bar 내지 20 bar일 수 있고, 바람직하게는 대략 19 bar일 수 있다.Various means for depressurizing the fluid may be applied to the second pressure reducing device 70 of this embodiment, and preferably, the second pressure reducing device 70 may be an expansion valve such as a Joule-Thomson valve. In addition, the pressure of the fluid depressurized by the second pressure reducing device 70 may be approximately 15 bar to 20 bar, preferably approximately 19 bar.

본 실시예에 의하면, 저장탱크(T)로 기액혼합상태의 유체를 공급하는 것이 아니라 기액분리기(60)에 의해 분리된 기체 상태의 가스만을 공급하므로, 액체 상태의 액화가스가 감압되며 플래시 가스가 발생할 우려가 없어, 저장탱크(T) 내부 압력을 용이하게 제어할 수 있다.According to the present embodiment, since the gas in the gas-liquid separator 60 is not supplied to the storage tank T, but the gas-liquid gas separated by the gas-liquid separator 60 is supplied, the liquid-liquid gas is decompressed and the flash gas is There is no fear of occurrence, and the pressure inside the storage tank T can be easily controlled.

또한, 본 실시예가 제1 펌프(10)와 제2 펌프(20)를 모두 포함하는 경우, 기액분리기(60)에 의해 분리된 액체 상태의 액화가스를 저장탱크(T)로부터 배출된 액화가스와 합류시켜 제2 펌프(20)로 보내므로, 제1 펌프(10)가 압축시킬 액화가스의 유량을 줄일 수 있어, 필요 유량을 전부 제1 펌프(10)에 의해 펌핑하는 경우와 비교하여 제1 펌프(10)의 소비 전력(power consumption)을 줄일 수 있는 장점이 있다.In addition, when the present embodiment includes both the first pump 10 and the second pump 20, the liquefied gas in the liquid state separated by the gas-liquid separator 60 and the liquefied gas discharged from the storage tank (T) By joining and sending to the second pump 20, the flow rate of the liquefied gas to be compressed by the first pump 10 can be reduced, so that the required flow rate is first compared to the case where all the required flow rate is pumped by the first pump 10. There is an advantage that can reduce the power consumption (power consumption) of the pump 10.

도 2는 본 발명의 바람직한 제2 실시예에 따른 선박용 연료 공급 시스템의 개략도이다.2 is a schematic diagram of a marine fuel supply system according to a second preferred embodiment of the present invention.

도 2에 도시된 제2 실시예의 선박용 연료 공급 시스템은, 도 1에 도시된 제1 실시예의 선박용 연료 공급 시스템에 비해, 기액분리기(60)에 의해 분리된 액화가스를 저장탱크(T)로 보낸다는 점에서 차이점이 존재하며, 이하에서는 차이점을 위주로 설명한다. 전술한 제1 실시예의 선박용 연료 공급 시스템과 동일한 부재에 대하여는 자세한 설명은 생략한다.The ship fuel supply system of the second embodiment shown in FIG. 2 sends the liquefied gas separated by the gas-liquid separator 60 to the storage tank T compared to the ship fuel supply system of the first embodiment shown in FIG. 1. Differences exist in that point, and the differences are mainly described below. Detailed description of the same member as the ship fuel supply system of the first embodiment described above will be omitted.

본 실시예에 의하면, 기액분리기(60)에 의해 분리된 액화가스가, 제1 실시예와 같이 저장탱크(T)로부터 배출된 액화가스와 합류되는 것이 아니라, 저장탱크(T) 내부로 보내지므로, 제1 감압장치(50)는 저장탱크(T) 내부 압력까지 액화가스를 감압시킨 후에 기액분리기(60)로 보내는 것이 바람직하다. 따라서, 본 실시예에 의하면 제1 실시예와 같이 제2 감압장치(70)를 추가로 포함할 필요가 없다.According to this embodiment, since the liquefied gas separated by the gas-liquid separator 60 is not joined to the liquefied gas discharged from the storage tank T as in the first embodiment, it is sent into the storage tank T. , It is preferable that the first decompression device 50 decompresses the liquefied gas to the pressure inside the storage tank T and then sends it to the gas-liquid separator 60. Therefore, according to this embodiment, it is not necessary to further include the second pressure reducing device 70 as in the first embodiment.

제1 감압장치(50)에 의해 감압된 유체의 압력은 대략 15 bar 내지 20 bar일 수 있고, 바람직하게는 대략 19 bar일 수 있다. The pressure of the fluid depressurized by the first pressure reducing device 50 may be approximately 15 bar to 20 bar, and preferably approximately 19 bar.

본 실시예에 의하면, 저장탱크(T)로 기액혼합상태의 유체를 공급하는 것이 아니라, 기액분리기(60)에 의해 분리된 기체 상태의 가스와 액체 상태의 액화가스를 각각 별도로 공급하고, 액체 상태의 액화가스는 저장탱크(T)의 내부 압력까지 감압된 상태이므로, 액체 상태의 액화가스가 감압되며 플래시 가스가 발생할 우려가 없어, 저장탱크(T) 내부 압력을 용이하게 제어할 수 있다.According to the present embodiment, the gas in the gas-liquid mixed state is not supplied to the storage tank T, but the gaseous gas and the liquid-liquid gas separated by the gas-liquid separator 60 are supplied separately, respectively. Since the liquefied gas is decompressed to the internal pressure of the storage tank T, the liquefied gas in the liquid state is decompressed and there is no fear of generating flash gas, so that the pressure inside the storage tank T can be easily controlled.

본 발명은 상기 실시예에 한정되지 않고, 본 발명의 기술적 요지를 벗어나지 아니하는 범위 내에서 다양하게 수정 또는 변형되어 실시될 수 있음은 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자에 있어서 자명한 것이다.The present invention is not limited to the above embodiments, and can be variously modified or modified without departing from the technical gist of the present invention. It is obvious to those skilled in the art to which the present invention pertains. Did.

T : 저장탱크 E : 엔진
10 : 제1 펌프 20 : 제2 펌프
40 : 가열기 50 : 제1 감압장치
60 : 기액분리기 70 : 제2 감압장치
V : 밸브T: Storage tank E: Engine
10: first pump 20: second pump
40: heater 50: first pressure reducing device
60: gas-liquid separator 70: second pressure reducing device
V: Valve

Claims (12)

엔진(E)에서 배출된 잉여 연료를 감압시키는 제1 감압장치(50); 및
상기 제1 감압장치(50)에 의해 감압된 기액혼합상태의 유체를 기체상과 액체상으로 분리하는 기액분리기(60);를 포함하며,
상기 기액분리기(60)에 의해 분리된 기체 상태의 가스는 저장탱크(T)로 복귀되고,
상기 엔진(E)에 과잉의 액화가스를 연료로 공급한 후, 상기 엔진(E)에서 사용되고 남은 연료가 상기 엔진(E)으로부터 배출되어 상기 제1 감압장치(50)로 공급되는, 선박용 연료 공급 시스템.A first decompression device 50 for depressurizing the surplus fuel discharged from the engine E; And
It includes; a gas-liquid separator 60 for separating the fluid in the gas-liquid mixed state decompressed by the first pressure reducing device 50 into a gas phase and a liquid phase;
The gaseous gas separated by the gas-liquid separator 60 is returned to the storage tank T,
After supplying excess liquefied gas to the engine (E) as fuel, the remaining fuel used in the engine (E) is discharged from the engine (E) and supplied to the first decompression device (50) for ship fuel supply system. 청구항 1에 있어서,
상기 기액분리기(60)에 의해 분리된 액화가스는 상기 저장탱크(T)로부터 배출된 액화가스와 합류되는, 선박용 연료 공급 시스템.The method according to claim 1,
The liquefied gas separated by the gas-liquid separator 60 is joined to the liquefied gas discharged from the storage tank (T), the ship fuel supply system. 청구항 2에 있어서,
상기 제1 감압장치(50)는 상기 저장탱크(T)로부터 배출된 액화가스의 압력까지 액화가스를 감압시키는, 선박용 연료 공급 시스템.The method according to claim 2,
The first pressure reducing device (50) depressurizes the liquefied gas to the pressure of the liquefied gas discharged from the storage tank (T), a ship fuel supply system. 청구항 3에 있어서,
상기 기액분리기(60)에 의해 분리된 가스를 감압시킨 후 상기 저장탱크(T)로 보내는 제2 감압장치(70)를 더 포함하는, 선박용 연료 공급 시스템.The method according to claim 3,
Further comprising a second pressure reducing device 70 for decompressing the gas separated by the gas-liquid separator 60 and sending it to the storage tank (T), the ship fuel supply system. 청구항 1에 있어서,
상기 기액분리기(60)에 의해 분리된 액화가스는 상기 저장탱크(T) 내부로 보내지는, 선박용 연료 공급 시스템.The method according to claim 1,
The liquefied gas separated by the gas-liquid separator 60 is sent to the storage tank (T), the ship fuel supply system. 청구항 5에 있어서,
상기 제1 감압장치(50)는 상기 저장탱크(T) 내부 압력까지 액화가스를 감압시키는, 선박용 연료 공급 시스템.The method according to claim 5,
The first pressure reducing device (50) depressurizes the liquefied gas to the pressure inside the storage tank (T), the ship fuel supply system. 청구항 1에 있어서,
상기 저장탱크(T) 내부에 설치되어, 액화가스를 펌핑하여 상기 저장탱크(T) 외부로 배출시키는 제1 펌프(10)를 더 포함하는, 선박용 연료 공급 시스템.The method according to claim 1,
It is installed inside the storage tank (T), further comprising a first pump (10) for pumping liquefied gas to discharge to the outside of the storage tank (T), marine fuel supply system. 청구항 1 내지 청구항 7 중 어느 한 항에 있어서,
상기 저장탱크(T)로부터 배출된 후 상기 엔진(E)으로 공급되는 액화가스를 상기 엔진(E)의 요구 압력으로 펌핑하는 제2 펌프(20)를 더 포함하는, 선박용 연료 공급 시스템.The method according to any one of claims 1 to 7,
Further comprising a second pump (20) for pumping the liquefied gas supplied to the engine (E) after being discharged from the storage tank (T) to the required pressure of the engine (E), the ship fuel supply system. 청구항 8에 있어서,
상기 기액분리기(60)에 의해 분리된 액체 상태의 액화가스는, 상기 제2 펌프(20) 상류로 보내져 상기 저장탱크(T)로부터 배출되는 액화가스와 합류되어 다시 상기 엔진(E)의 연료로 사용되는, 선박용 연료 공급 시스템.The method according to claim 8,
The liquefied gas in the liquid state separated by the gas-liquid separator 60 is sent to the upstream of the second pump 20 and merges with the liquefied gas discharged from the storage tank T, and is again used as fuel for the engine E. Marine fuel supply system used. 청구항 1 내지 청구항 7 중 어느 한 항에 있어서,
상기 기액분리기(60)에 의해 분리된 액화가스가 배출되는 라인 상에 설치되는 밸브(V)를 더 포함하는, 선박용 연료 공급 시스템.The method according to any one of claims 1 to 7,
Further comprising a valve (V) is installed on the line is discharged liquefied gas separated by the gas-liquid separator 60, the ship fuel supply system. 청구항 1 내지 청구항 7 중 어느 한 항에 있어서,
상기 저장탱크(T)로부터 배출된 후 상기 엔진(E)으로 공급되는 액화가스를 상기 엔진(E)의 요구 온도로 가열시키는 가열기(40)를 더 포함하는, 선박용 연료 공급 시스템.The method according to any one of claims 1 to 7,
Further comprising a heater 40 for heating the liquefied gas supplied to the engine (E) after being discharged from the storage tank (T) to the required temperature of the engine (E), the ship fuel supply system. 1) 엔진(E)에 과잉의 액화가스를 연료로 공급한 후, 상기 엔진(E)에서 사용되고 남은 연료가 상기 엔진(E)으로부터 배출되는 단계;
2) 상기 1)단계에서 상기 엔진(E)으로부터 배출된 잉여 연료를 감압시키는 단계;
3) 상기 2)단계에서 감압된 기액혼합상태의 유체를 기체상과 액체상으로 분리하는 단계; 및
4) 상기 3)단계에서 분리된 기체 상태의 가스를 저장탱크(T)로 복귀시키는 단계;를 포함하고,
상기 저장탱크(T)로부터 배출된 액화가스는 상기 엔진(E)에 연료로 공급되는, 선박용 연료 공급 방법.1) after supplying excess liquefied gas to the engine E as fuel, the remaining fuel used in the engine E is discharged from the engine E;
2) reducing the excess fuel discharged from the engine (E) in step 1);
3) separating the fluid in the gas-liquid mixed state decompressed in step 2) into a gas phase and a liquid phase; And
4) returning the gas in the gas phase separated in step 3) to the storage tank (T);
The liquefied gas discharged from the storage tank (T) is supplied as fuel to the engine (E), the ship fuel supply method.
KR1020180139629A 2018-11-14 2018-11-14 Fuel Supply System and Method for Vessel KR102601307B1 (en)

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