WO2015174681A1 - Fuel supply system and fuel supply method of lpg carrier - Google Patents

Fuel supply system and fuel supply method of lpg carrier Download PDF

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Publication number
WO2015174681A1
WO2015174681A1 PCT/KR2015/004543 KR2015004543W WO2015174681A1 WO 2015174681 A1 WO2015174681 A1 WO 2015174681A1 KR 2015004543 W KR2015004543 W KR 2015004543W WO 2015174681 A1 WO2015174681 A1 WO 2015174681A1
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WO
WIPO (PCT)
Prior art keywords
lpg
fuel supply
day tank
fuel
supplying
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PCT/KR2015/004543
Other languages
French (fr)
Korean (ko)
Inventor
장재호
정제헌
유병용
문영식
Original Assignee
대우조선해양 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 대우조선해양 주식회사 filed Critical 대우조선해양 주식회사
Priority to CN201580019080.8A priority Critical patent/CN106458309A/en
Publication of WO2015174681A1 publication Critical patent/WO2015174681A1/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
    • 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
    • B63H21/12—Use of propulsion power plant or units on vessels the vessels being motor-driven
    • 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
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/04—Feeding by means of driven pumps
    • F02M37/06—Feeding by means of driven pumps mechanically driven
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63J—AUXILIARIES ON VESSELS
    • B63J99/00—Subject matter not provided for in other groups of this subclass
    • B63J2099/001—Burning of transported goods, e.g. fuel, boil-off or refuse
    • B63J2099/003—Burning of transported goods, e.g. fuel, boil-off or refuse of cargo oil or fuel, or of boil-off gases, e.g. for propulsive purposes
    • 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
    • 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
    • Y02T70/00—Maritime or waterways transport
    • Y02T70/50—Measures to reduce greenhouse gas emissions related to the propulsion system

Definitions

  • the present invention relates to a fuel supply system and a fuel supply method that can be applied to an LPG fuel engine used in an LPG carrier.
  • LPG liquefied Petroleum Gas
  • oil fuels such as heavy fuel oil (HFO) or marine diesel oil (MFO) have been used as fuel for engines of LPG carriers.
  • HFO heavy fuel oil
  • MFO marine diesel oil
  • LPG as a cargo of a conventional LPG carrier is stored and transported in the LPG storage tank
  • BOG Silicon Off Gas
  • LPG storage tank BOG (Boil Off Gas) generated in the LPG storage tank is re-liquefied in the reliquefaction plant and then transferred to the LPG storage tank and stored again.
  • the present invention is to provide a fuel supply system that can supply the re-liquefied BOG to the LPG fuel engine in the reliquefaction plant of the LPG carrier, minimizing the addition of equipment to meet the requirements of the engine.
  • the present invention also provides a fuel supply method for supplying re-liquefied BOG to an LPG fuel engine engine in a reliquefaction plant of an LPG carrier, and minimizing the addition of equipment to meet the requirements of the engine. .
  • the present invention provides a fuel supply system for supplying fuel to an LPG fuel engine of a LPG carrier (Liquefied Petroleum Gas Carrier), a fuel supply line for supplying LPG to a day tank; A day tank storing LPG supplied from the fuel supply line and supplying the LPG to the LPG fuel engine; And a pressurizing means for pressurizing the day tank.
  • LPG carrier Liiquefied Petroleum Gas Carrier
  • the pressing means according to the embodiment may be installed in the day tank front end or day tank.
  • Pressing means installed in the front end of the day tank according to the embodiment may be a compressor or a pump.
  • the pressurizing means installed in the day tank according to the embodiment may be an N 2 supply system.
  • N 2 supply system may be one of N 2 generator (generator) or N 2 gas bottle (gas bottle).
  • the fuel supply line includes a first fuel supply line including a reliquefaction plant for supplying LPG generated by reliquefying the BOG generated in the LPG storage tank to the day tank; And at least one fuel supply line selected from a second fuel supply line supplying the LPG stored in the LPG storage tank to the day tank.
  • LPG generated by re-liquefying BOG in the first fuel supply line according to the embodiment may be -13 ⁇ 40 °C.
  • the second fuel supply line includes at least one pump for supplying LPG stored in the LPG storage tank; And it may be to include a heater for heating the LPG.
  • the at least one pump according to the embodiment is a cargo pump (cargo pump) for pumping the LPG stored in the LPG storage tank: and one or more selected from the cargo booster pump (cargo booster pump) for pressurizing the LPG Can be.
  • cargo pump for pumping the LPG stored in the LPG storage tank: and one or more selected from the cargo booster pump (cargo booster pump) for pressurizing the LPG Can be.
  • the cargo booster pump according to the embodiment may be connected in series or in parallel.
  • a heater may be additionally installed at the rear end of the day tank.
  • Day tank according to the embodiment may be an internal pressure of 30 to 50 bar.
  • the LPG fuel engine according to the embodiment may be a ME-LGI engine.
  • the present invention also provides a fuel supply method for supplying fuel to an LPG fuel engine of a LPG carrier (Liquefied Petroleum Gas Carrier), comprising: a fuel supply step of supplying LPG to a day tank; And storing the LPG supplied from the fuel supplying step in a pressurized day tank and then supplying the LPG fuel engine to the LPG fuel engine, wherein the day tank may be pressurized by a pressurizing means.
  • LPG carrier Liquefied Petroleum Gas Carrier
  • Day tank according to the embodiment may be one that is pressed by the pressing means installed in the front end of the day tank or day tank.
  • Pressing means installed in the front end of the day tank according to the embodiment may be a compressor or a pump.
  • the pressurizing means installed in the day tank according to the embodiment may be an N 2 supply system.
  • N 2 supply system may be one of N 2 generator (generator) or N 2 gas bottle (gas bottle).
  • the fuel supply step includes a first fuel supply step of supplying the LPG generated by reliquefaction of the BOG generated in the LPG storage tank to the high pressure day tank; And at least one fuel supply step selected from the second fuel supply step of supplying the LPG stored in the LPG storage tank to the high pressure day tank.
  • the second fuel supply step according to the embodiment may include pressurizing the LPG stored in the LPG storage tank; And heating the pressurized LPG.
  • Pressurizing the LPG includes the steps of pumping the LPG stored in the LPG storage tank; And pressurizing the pumped LPG.
  • Pressurizing the pumped LPG according to the embodiment may be pressurized by a cargo booster pump connected in series or in parallel.
  • Day tank according to the embodiment may be pressurized so that the internal pressure is 30 ⁇ 50 bar.
  • the fuel supply method according to the embodiment may further comprise the step of heating the LPG at the rear end of the day tank.
  • the LPG fuel engine according to the embodiment may be a ME-LGI engine.
  • the present invention also provides a fuel supply system for supplying a MEG-LGI engine for propulsion of an LPG carrier including a day tank for storing LPG and then supplying the fuel to the engine. It provides a fuel supply system for supplying a ME-LGI engine for propulsion of an LPG carrier, characterized in that an N 2 supply system is installed to press the internal pressure of the day tank to the required pressure of the ME-LGI at 30 to 50 bar.
  • LPG includes a first fuel supply line including a reliquefaction plant for supplying LPG generated by reliquefying the BOG generated in the LPG storage tank to the day tank; And a second fuel supply line for supplying LPG stored in the LPG storage tank to the day tank.
  • the present invention also a fourth as the embodiment, the LPG as a post ME-LGI engine propulsion ME-LGI engine supply a fuel supply method for the LPG carriers to be supplied to the storage in the day tank, the day tank is N 2 supply
  • the present invention provides a fuel supply method for supplying a ME-LGI engine for propulsion of an LPG carrier, wherein the internal pressure is pressurized to 30 to 50 bar, which is equivalent to the required pressure of the ME-LGI.
  • the present invention also provides an LPG carrier including the fuel supply system.
  • the fuel supply system is configured using a reliquefaction plant, a pump, or the like installed in the LPG carrier, it is possible to reduce the cost of installing additional equipment.
  • LPG is re-liquefied in the reliquefaction plant and stored in the LPG and LPG storage tanks stored in the high pressure day tank and supplied to the LPG fuel engine, so that the fuel supply system can be configured without additional equipment to meet the required pressure of the LPG fuel engine. Can be.
  • the LPG of the high pressure formed by reliquefaction in the reliquefaction plant of the LPG carrier is supplied to the high pressure day tank without reducing the pressure, it is possible to prevent the generation of flash gas that may be generated due to the reduced pressure.
  • FIG. 1 is a block diagram of a fuel supply system according to an embodiment of the present invention.
  • FIG. 2 is a block diagram of a reliquefaction plant included in the first fuel supply line of the fuel supply system according to FIG. 1.
  • FIG. 3 is a block diagram illustrating a fuel supply process by a second fuel supply line of the fuel supply system according to FIG. 1.
  • FIG. 1 is a block diagram of a fuel supply system according to an embodiment of the present invention.
  • the fuel supply system is a fuel supply system for supplying fuel to the LPG fuel engine of the LPG carrier (Liquefied Petroleum Gas Carrier), a fuel supply line for supplying LPG to the day tank; A day tank 300 for storing the LPG supplied from the fuel supply line and supplying the LPG to the LPG fuel engine; And it may include a pressing means 310 for pressing the day tank 300.
  • LPG carrier Liiquefied Petroleum Gas Carrier
  • the fuel supply line includes a first fuel supply line 100 including a reliquefaction plant 110 for supplying LPG generated by reliquefying the BOG generated in the LPG storage tank 10 to the day tank 300; And at least one fuel supply line selected from the second fuel supply line 200 supplying the LPG stored in the LPG storage tank 10 to the day tank 300.
  • the first fuel supply line 100 is a fuel supply line for supplying LPG formed by reliquefaction of the BOG generated in the LPG storage tank 10 to the day tank 300, and re-liquefies the BOG generated in the LPG storage tank 10.
  • the liquefaction plant 110 may be included.
  • FIG. 2 shows a block diagram of a reliquefaction plant 110 included in the first fuel supply line 100 of the fuel supply system according to FIG. 1.
  • the reliquefaction plant 110 includes a compressor (112) for compressing the BOG generated in the LPG storage tank (10); And a condenser 114 for condensing the BOG compressed by the compressor 112.
  • the compressor may be a three stage compressor including a first compressor 1, a second compressor 2, and a third compressor 3.
  • the front of the first compressor may be a knock out drum (Knock Out drum) 111 for separating the liquid component from the BOG generated in the LPG storage tank 10 may be installed.
  • BOG generated in the LPG storage tank 10 may remove liquid components, such as mist and droplets, from the knockout drum 111 before being sucked into the first compressor 1. Accordingly, it is possible to effectively block the liquid component flowing into the compressor 112 to prevent the shortening of the life of the compressor 112 due to the liquid component.
  • an intercooler 113 may be installed at a rear end of the first compressor 1 to cool the BOG primary compressed by the first compressor 1.
  • the intercooler 113 may prevent the temperature of the BOG from rising during the compression process.
  • the condenser 114 may be to condense the compressed BOG using a refrigerant, and the refrigerant may be seawater (SW).
  • the refrigerant may be seawater (SW).
  • BOG may be condensed and reliquefied by heat exchange between the seawater at 25 ° C. to 35 ° C. and the BOG compressed by the compressor 112.
  • the reliquefied BOG that is, LPG may be obtained.
  • a receiver 115 for storing LPG formed by reliquefaction of BOG and supplying the LPG to a day tank may be installed.
  • the LPG stored in the receiver 115 may be supplied to the day tank 300 at a high pressure of 20 ⁇ 30bar.
  • the LPG stored in the receiver 115 may be supplied to the day tank 300 after being cooled through the intercooler 113.
  • the second fuel supply line 200 is a fuel supply line for supplying LPG stored in the LPG storage tank 10 to the day tank 300, and the second fuel supply line 200 supplies the LPG stored in the LPG storage tank.
  • the second fuel supply line 200 is a cargo pump 210 for pumping LPG stored in the LPG storage tank: a cargo booster pump 220 for pressurizing the LPG; And it may include a heater 230 for heating the pressurized LPG.
  • the LPG stored in the LPG storage tank 10 may be pumped by the cargo pump 210 in the state of 0bar and -48 ° C, and may be pumped to the day tank 300 at 7bar and -47 ° C.
  • the pressurizer may be pressurized by the cargo booster pump 220 and pressurized to a state of 20 bar and ⁇ 42 ° C., and heated to 20 bar and 40 ° C. by the heater to be supplied to the day tank 300.
  • One cargo booster pump 220 may be used, and a plurality of cargo booster pumps 220 may be used in series or in parallel.
  • two cargo booster pumps 220 may be connected to implement a structure connected in series or in parallel due to a valve operation, and when a cargo booster pump ( 200) can be connected in series.
  • the day tank is used to supply LPG to the LPG fuel engine using a cargo pump built in the LPG storage tank of the LPG carrier, but adjusts the amount of LPG pumped by the cargo pump to fuel the LPG fuel engine. It is a tank that can supply as much as.
  • the day tank 300 is a high-pressure tank in which the internal pressure is pressurized to 30 to 50 bar.
  • the day tank 300 may store the LPG supplied through the fuel supply line as described above at a high pressure.
  • LPG may be supplied to the LPG fuel engine from the day tank without a separate pressurizing means after the day tank 300.
  • a heater for heating the LPG to the required temperature of the LPG fuel engine may be additionally installed.
  • Pressing means for maintaining the day tank 300 in a high pressure state may be installed in front of the day tank 300 or the day tank 300.
  • the pressurizing means installed in front of the day tank 300 may be a compressor or a pump.
  • the compressor may be a compressor 112 included in the reliquefaction plant 110 of the first fuel air line
  • the compressor 112 is the required pressure of the LPG fuel engine It can be a high pressure compressor that can satisfy.
  • the LPG formed by reliquefaction in the reliquefaction plant 110 by the compressor 112 may represent a required pressure of the LPG fuel engine, a pressure of 30 to 50 bar.
  • the pump may pressurize the LPG formed by reliquefaction in the reliquefaction plant 110 of the first fuel supply line.
  • the pressurizing means installed in the day tank 300 may be an N 2 supply system 310 installed on the upper part of the day tank 300, and may maintain the internal pressure of the day tank 300 at a high pressure by N 2 supply.
  • the N 2 supply system 310 may be selected from an N 2 generator and an N 2 gas bottle.
  • the LPG fuel engine may be a ME-LGI engine, and LPG supplied to the engine may be injected at a high pressure inside the engine.
  • the present invention also provides a fuel supply method for supplying fuel to the LPG fuel engine of the LPG carrier, the fuel supply step of supplying LPG to the day tank; And storing the LPG supplied from the fuel supplying step in a pressurized day tank and then supplying the LPG fuel engine to the LPG fuel engine, wherein the day tank is pressurized by N 2 supply. .
  • the fuel supply step may include a first fuel supply step of supplying LPG generated by reliquefaction of BOG generated in the LPG storage tank to a high pressure day tank; And at least one fuel supply step selected from the second fuel supply step of supplying the LPG stored in the LPG storage tank to the high pressure day tank.
  • the second fuel supply step may include pressurizing the LPG stored in the LPG storage tank; And heating the pressurized LPG.
  • pressurizing the LPG stored in the LPG storage tank may include pumping the LPG stored in the LPG storage tank; And pressurizing the LPG.
  • the pressurizing may be performed by pressurizing the LPG using a cargo booster pump, by using one cargo booster pump, or by connecting a plurality of cargo booster pumps in series or in parallel to adjust the pressurized pressure.
  • the day tank is pressurized by a press means installed in the front end of the day tank or the day tank, so that the internal pressure can be maintained at a high pressure of 30 to 50 bar, so that the LPG through the day tank without additional pressure to the LPG fuel engine Can supply
  • the LPG may be heated at the rear end of the day tank to heat the LPG to a required temperature of the LPG fuel engine.
  • the present invention also provides a fuel supply system for supplying a MEG-LGI engine for propulsion of an LPG carrier including a day tank for storing LPG and supplying the fuel to an engine, wherein an internal pressure of the day tank is applied to an upper portion of the day tank.
  • the present invention relates to a fuel supply system for supplying a ME-LGI engine for propulsion of an LPG carrier, wherein an N2 supply system pressurizes the required pressure of the ME-LGI to 30 to 50 bar.
  • the LPG may include a first fuel supply line including a reliquefaction plant for supplying LPG generated by reliquefying the BOG generated in the LPG storage tank to a day tank; And a second fuel supply line for supplying LPG stored in the LPG storage tank to the day tank.
  • the present invention also provides a fuel supply method for supplying a MEG-LGI engine for propulsion of an LPG carrier that stores LPG in a day tank and supplies the MEG-LGI engine, wherein the day tank has an internal pressure of ME- by a N 2 supply. It may be pressurized to 30-50 bar, which is equivalent to the required pressure of the LGI.

Abstract

The present invention relates to a fuel supply system and a fuel supply method and, more specifically, to a fuel supply system and a fuel supply method, capable of storing LPG, which is reliquefied to be formed by a BOG reliquefaction system of an LPG carrier, in a high pressure day tank, and then supplying the same to an LPG fuel engine from the rear end of the day tank without an additional pressurization device. According to the present invention, a fuel supply system can be formed with a simple constitution without an additional device for pressurizing a fuel to be supplied to an LPG fuel engine, and thus indirect, economical effects can be expected.

Description

LPG 운반선의 연료공급 시스템 및 연료공급 방법Fuel supply system and fuel supply method of LPG carrier
본 발명은 LPG 운반선에서 사용되는 LPG 연료 엔진에 적용될 수 있는 연료공급 시스템 및 연료공급 방법에 관한 것이다. The present invention relates to a fuel supply system and a fuel supply method that can be applied to an LPG fuel engine used in an LPG carrier.
일반적으로, 석유가스는 생산지에서 저온으로 액화된 액화석유가스(Liquefied Petroleum Gas, 이하 LPG라 함)의 상태로 만들어진 후 LPG 운반선에 의해 목적지가지 원거리에 걸쳐 수송된다.In general, petroleum gas is produced in the form of liquefied liquefied petroleum gas (Liquefied Petroleum Gas, hereinafter referred to as LPG) at the production site, and then transported to a destination by an LPG carrier.
종래 LPG 운반선의 엔진용 연료로서는 HFO(Heavy Fuel Oil) 또는 MFO(Marine Diesel Oil)와 같은 오일 연료를 사용하여 왔다.Conventionally, oil fuels such as heavy fuel oil (HFO) or marine diesel oil (MFO) have been used as fuel for engines of LPG carriers.
또한, 종래 LPG 운반선의 화물로서 LPG는 LPG 저장탱크에 저장되어 운반되는데, 상기 LPG 저장탱크에서 발생한 BOG(Boil Off Gas)는 재액화 플랜트에서 재액화된 후 다시 LPG 저장탱크로 이송되어 저장되었다.In addition, LPG as a cargo of a conventional LPG carrier is stored and transported in the LPG storage tank, BOG (Boil Off Gas) generated in the LPG storage tank is re-liquefied in the reliquefaction plant and then transferred to the LPG storage tank and stored again.
이와 같이 종래 LPG 운반선에서는 연료와 화물이 이원화된 시스템에 의해 사용 또는 처리되었고, 화물로서 저장된 LPG 저장탱크에 저장된 LPG를 연료로 사용할 수 있는 엔진 등의 수단은 존재하지 않았다. As such, in the conventional LPG carrier, fuel and cargo are used or processed by a dual system, and there is no means such as an engine capable of using LPG stored in the LPG storage tank stored as cargo as fuel.
최근, LPG 저장탱크에 저장된 LPG를 엔진의 연료로 공급하는 방안에 대한 관심이 높아지고 있으나, 저장탱크에서 저온 상태로 저장된 LPG를 엔진의 연료로서 사용하기 위해서는 추가적인 장비들이 필요하다.Recently, there has been a growing interest in supplying LPG stored in LPG storage tanks as fuel for an engine, but additional equipment is required to use LPG stored at low temperature in a storage tank as fuel for an engine.
LPG 운반선에 설치되어 있는 재액화 플랜트, 펌프 등을 이용하여 화물로서 저장된 LPG를 LPG 연료 엔진의 연료로서 사용할 수 있는 연료 공급 시스템 개발이 요구되고 있다.There is a demand for developing a fuel supply system that can use LPG stored as a cargo as a fuel of an LPG fuel engine by using a reliquefaction plant and a pump installed in an LPG carrier.
본 발명은 LPG 운반선의 재액화 플랜트에서 재액화된 BOG를 LPG 연료 엔진에 공급하되, LPG를 엔진의 요구 조건에 부합하도록 하는 장비의 추가를 최소화할 수 있는 연료 공급 시스템을 제공하고자 한다.The present invention is to provide a fuel supply system that can supply the re-liquefied BOG to the LPG fuel engine in the reliquefaction plant of the LPG carrier, minimizing the addition of equipment to meet the requirements of the engine.
본 발명은 또한, LPG 운반선의 재액화 플랜트에서 재액화된 BOG를 LPG 연료 엔진 엔진에 공급하되, LPG를 엔진의 요구 조건에 부합하도록 하는 장비의 추가를 최소화할 수 있는 연료 공급 방법을 제공하고자 한다.The present invention also provides a fuel supply method for supplying re-liquefied BOG to an LPG fuel engine engine in a reliquefaction plant of an LPG carrier, and minimizing the addition of equipment to meet the requirements of the engine. .
이에 본 발명은 바람직한 제1 구현예로서, LPG 운반선(Liquefied Petroleum Gas Carrier)의 LPG 연료 엔진에 연료를 공급하기 위한 연료 공급 시스템으로서, LPG를 데이탱크로 공급하는 연료공급라인; 상기 연료공급라인으로부터 공급된 LPG를 저장한 후 LPG 연료 엔진에 공급하는 데이탱크; 및 상기 데이탱크를 가압시키는 가압수단을 포함하는 연료 공급 시스템을 제공한다.Accordingly, the present invention provides a fuel supply system for supplying fuel to an LPG fuel engine of a LPG carrier (Liquefied Petroleum Gas Carrier), a fuel supply line for supplying LPG to a day tank; A day tank storing LPG supplied from the fuel supply line and supplying the LPG to the LPG fuel engine; And a pressurizing means for pressurizing the day tank.
상기 구현예에 의한 상기 가압수단은 데이탱크 전단 또는 데이탱크에 설치된 것일 수 있다.The pressing means according to the embodiment may be installed in the day tank front end or day tank.
상기 구현예에 의한 데이탱크 전단에 설치된 가압수단은 컴프레서 또는 펌프인 것일 수 있다.Pressing means installed in the front end of the day tank according to the embodiment may be a compressor or a pump.
상기 구현예에 의한 데이탱크에 설치된 가압수단은 N2 공급시스템인 것일 수 있다.The pressurizing means installed in the day tank according to the embodiment may be an N 2 supply system.
상기 구현예에 의한 N2 공급시스템은 N2 제너레이터(generator) 또는 N2 가스 보틀(gas bottle)인 것일 수 있다.N 2 supply system according to this embodiment may be one of N 2 generator (generator) or N 2 gas bottle (gas bottle).
상기 구현예에 의한 연료 공급라인은 LPG 저장탱크에서 발생한 BOG를 재액화시켜 생성된 LPG를 데이탱크로 공급하는 재액화 플랜트를 포함하는 제1 연료 공급라인; 및 LPG 저장탱크에 저장된 LPG를 데이탱크로 공급하는 제2 연료 공급라인 중 선택되는 1종 이상의 연료 공급라인을 포함하는 것일 수 있다.The fuel supply line according to the embodiment includes a first fuel supply line including a reliquefaction plant for supplying LPG generated by reliquefying the BOG generated in the LPG storage tank to the day tank; And at least one fuel supply line selected from a second fuel supply line supplying the LPG stored in the LPG storage tank to the day tank.
상기 구현예에 의한 제1 연료 공급라인에서 BOG를 재액화시켜 생성된 LPG는 -13 ~ 40℃인 것일 수 있다.LPG generated by re-liquefying BOG in the first fuel supply line according to the embodiment may be -13 ~ 40 ℃.
상기 구현예에 의한 제2 연료 공급라인은 LPG 저장탱크에 저장된 LPG를 공급하기 위한 적어도 하나의 펌프; 및 상기 LPG를 가열하기 위한 히터를 포함하는 것일 수 있다.The second fuel supply line according to the embodiment includes at least one pump for supplying LPG stored in the LPG storage tank; And it may be to include a heater for heating the LPG.
상기 구현예에 의한 상기 적어도 하나의 펌프는 LPG 저장탱크에 저장된 LPG를 펌핑하기 위한 카고펌프(cargo pump): 및 상기 LPG를 가압하기 위한 카고 부스터 펌프(cargo booster pump) 중 선택되는 1종 이상인 것일 수 있다.The at least one pump according to the embodiment is a cargo pump (cargo pump) for pumping the LPG stored in the LPG storage tank: and one or more selected from the cargo booster pump (cargo booster pump) for pressurizing the LPG Can be.
상기 구현예에 의한 카고 부스터 펌프는 직렬 또는 병렬로 연결된 것일 수 있다.The cargo booster pump according to the embodiment may be connected in series or in parallel.
상기 구현예에 의한 연료 공급 시스템은 데이탱크의 후단에 히터가 추가로 설치된 것일 수 있다.In the fuel supply system according to the embodiment, a heater may be additionally installed at the rear end of the day tank.
상기 구현예에 의한 데이탱크는 내부 압력은 30 ~ 50 bar인 것일 수 있다.Day tank according to the embodiment may be an internal pressure of 30 to 50 bar.
상기 구현예에 의한 LPG 연료 엔진은 ME-LGI 엔진인 것일 수 있다.The LPG fuel engine according to the embodiment may be a ME-LGI engine.
본 발명은 또한 바람직한 제2 구현예로서, LPG 운반선(Liquefied Petroleum Gas Carrier)의 LPG 연료 엔진에 연료를 공급하기 위한 연료 공급 방법으로서, LPG를 데이탱크로 공급하는 연료 공급단계; 및 상기 연료 공급단계로부터 공급된 LPG를 가압된 데이탱크에 저장한 후 LPG 연료 엔진에 공급하는 단계를 포함하되, 상기 데이탱크는 가압수단에 의해 가압되는 것일 수 있다.The present invention also provides a fuel supply method for supplying fuel to an LPG fuel engine of a LPG carrier (Liquefied Petroleum Gas Carrier), comprising: a fuel supply step of supplying LPG to a day tank; And storing the LPG supplied from the fuel supplying step in a pressurized day tank and then supplying the LPG fuel engine to the LPG fuel engine, wherein the day tank may be pressurized by a pressurizing means.
상기 구현예에 의한 데이탱크는 데이탱크 전단 또는 데이탱크에 설치된 가압수단에 의해 가압되는 것일 수 있다.Day tank according to the embodiment may be one that is pressed by the pressing means installed in the front end of the day tank or day tank.
상기 구현예에 의한 데이탱크 전단에 설치된 가압수단은 컴프레서 또는 펌프인 것일 수 있다.Pressing means installed in the front end of the day tank according to the embodiment may be a compressor or a pump.
상기 구현예에 의한 데이탱크에 설치된 가압수단은 N2 공급시스템인 것일 수 있다.The pressurizing means installed in the day tank according to the embodiment may be an N 2 supply system.
상기 구현예에 의한 N2 공급시스템은 N2 제너레이터(generator) 또는 N2 가스 보틀(gas bottle)인 것일 수 있다.N 2 supply system according to this embodiment may be one of N 2 generator (generator) or N 2 gas bottle (gas bottle).
상기 구현예에 의한 상기 연료 공급단계는 LPG 저장탱크에서 발생한 BOG를 재액화시켜 생성된 LPG를 고압 데이탱크로 공급하는 제1 연료 공급단계; 및 LPG 저장탱크에 저장된 LPG를 고압 데이탱크로 공급하는 제2 연료 공급단계중 선택되는 1종 이상의 연료 공급단계를 포함하는 것일 수 있다.The fuel supply step according to the embodiment includes a first fuel supply step of supplying the LPG generated by reliquefaction of the BOG generated in the LPG storage tank to the high pressure day tank; And at least one fuel supply step selected from the second fuel supply step of supplying the LPG stored in the LPG storage tank to the high pressure day tank.
상기 구현예에 의한 제2 연료 공급단계는 LPG 저장탱크에 저장된 LPG를 가압하는 단계; 및 상기 가압된 LPG를 가열하는 단계를 포함하는 것일 수 있다.The second fuel supply step according to the embodiment may include pressurizing the LPG stored in the LPG storage tank; And heating the pressurized LPG.
상기 구현예에 의한 LPG를 가압하는 단계는 LPG 저장탱크에 저장된 LPG를 펌핑하는 단계; 및 상기 펌핑된 LPG를 가압하는 단계를 포함하는 것일 수 있다.Pressurizing the LPG according to the embodiment includes the steps of pumping the LPG stored in the LPG storage tank; And pressurizing the pumped LPG.
상기 구현예에 의한 펌핑된 LPG를 가압하는 단계는 직렬 또는 병렬로 연결된 카고 부스터 펌프에 의해 가압되는 것일 수 있다.Pressurizing the pumped LPG according to the embodiment may be pressurized by a cargo booster pump connected in series or in parallel.
상기 구현예에 의한 데이탱크는 내부 압력이 30 ~ 50 bar가 되도록 가압되는 것일 수 있다.Day tank according to the embodiment may be pressurized so that the internal pressure is 30 ~ 50 bar.
상기 구현예에 의한 연료 공급 방법은 상기 데이탱크 후단에서 LPG를 가열하는 단계를 추가로 포함하는 것일 수 있다.The fuel supply method according to the embodiment may further comprise the step of heating the LPG at the rear end of the day tank.
상기 구현예에 의한 LPG 연료 엔진은 ME-LGI 엔진인 것일 수 있다.The LPG fuel engine according to the embodiment may be a ME-LGI engine.
본 발명은 또한 바람직한 제3 구현예로서, LPG를 저장한 후 엔진의 연료로 공급하는 데이탱크를 포함하는 LPG 운반선의 추진용 ME-LGI 엔진 공급용 연료 공급 시스템으로서, 상기 데이탱크의 상부에는 상기 데이탱크의 내부 압력을 ME-LGI의 요구 압력인 30 ~ 50 bar로 가압하는 N2 공급시스템이 설치된 것을 특징으로 하는 LPG 운반선의 추진용 ME-LGI 엔진 공급용 연료 공급 시스템을 제공한다.The present invention also provides a fuel supply system for supplying a MEG-LGI engine for propulsion of an LPG carrier including a day tank for storing LPG and then supplying the fuel to the engine. It provides a fuel supply system for supplying a ME-LGI engine for propulsion of an LPG carrier, characterized in that an N 2 supply system is installed to press the internal pressure of the day tank to the required pressure of the ME-LGI at 30 to 50 bar.
상기 구현예에 의한 LPG는 LPG 저장탱크에서 발생한 BOG를 재액화시켜 생성된 LPG를 데이탱크로 공급하는 재액화 플랜트를 포함하는 제1 연료 공급라인; 및 LPG 저장탱크에 저장된 LPG를 데이탱크로 공급하는 제2 연료 공급라인 중 선택되는 1종 이상의 연료 공급라인에 의해 공급되는 것일 수 있다.LPG according to the embodiment includes a first fuel supply line including a reliquefaction plant for supplying LPG generated by reliquefying the BOG generated in the LPG storage tank to the day tank; And a second fuel supply line for supplying LPG stored in the LPG storage tank to the day tank.
본 발명은 또한 바람직한 제4 구현예로서, LPG를 데이탱크에 저장한 후 ME-LGI 엔진에 공급하는 LPG 운반선의 추진용 ME-LGI 엔진 공급용 연료 공급 방법으로서, 상기 데이탱크는 N2 공급에 의해 내부 압력이 ME-LGI의 요구 압력과 동등 수준인 30 ~ 50 bar으로 가압되는 것을 특징으로 하는 LPG 운반선의 추진용 ME-LGI 엔진 공급용 연료 공급 방법을 제공한다.The present invention also a fourth as the embodiment, the LPG as a post ME-LGI engine propulsion ME-LGI engine supply a fuel supply method for the LPG carriers to be supplied to the storage in the day tank, the day tank is N 2 supply The present invention provides a fuel supply method for supplying a ME-LGI engine for propulsion of an LPG carrier, wherein the internal pressure is pressurized to 30 to 50 bar, which is equivalent to the required pressure of the ME-LGI.
본 발명은 또한, 상기 연료 공급 시스템을 포함하는 LPG 운반선을 제공한다.The present invention also provides an LPG carrier including the fuel supply system.
본 발명에 따르면, LPG 운반선에 설치되어 있던 재액화 플랜트, 펌프 등을 이용하여 연료 공급 시스템을 구성하므로 추가 장비 설치 비용을 절감할 수 있다.According to the present invention, since the fuel supply system is configured using a reliquefaction plant, a pump, or the like installed in the LPG carrier, it is possible to reduce the cost of installing additional equipment.
또한, 재액화 플랜트에서 재액화되어 LPG 및 LPG 저장탱크에 저장된 LPG를 고압의 데이탱크에 저장 후 LPG 연료 엔진에 공급하므로, LPG 연료 엔진의 요구 압력을 맞추기 위한 추가 설비 없이도 연료 공급 시스템을 구성할 수 있다.In addition, LPG is re-liquefied in the reliquefaction plant and stored in the LPG and LPG storage tanks stored in the high pressure day tank and supplied to the LPG fuel engine, so that the fuel supply system can be configured without additional equipment to meet the required pressure of the LPG fuel engine. Can be.
또한, LPG 운반선의 재액화 플랜트에서 재액화되어 형성된 고압의 LPG를 감압시키지 않고도 고압의 데이탱크에 공급하므로 감압으로 인해 생성될 수 있는 플래시 가스의 발생을 방지할 수 있다. In addition, since the LPG of the high pressure formed by reliquefaction in the reliquefaction plant of the LPG carrier is supplied to the high pressure day tank without reducing the pressure, it is possible to prevent the generation of flash gas that may be generated due to the reduced pressure.
도 1은 본 발명의 일 실시예에 따른 연료 공급 시스템의 블록도이다.1 is a block diagram of a fuel supply system according to an embodiment of the present invention.
도 2는 도 1에 따른 연료 공급 시스템의 제1 연료 공급라인에 포함된 재액화 플랜트의 블록도이다.FIG. 2 is a block diagram of a reliquefaction plant included in the first fuel supply line of the fuel supply system according to FIG. 1.
도 3은 도 1에 따른 연료 공급 시스템의 제2 연료 공급라인에 의한 연료 공급 공정을 나타낸 블록도이다.3 is a block diagram illustrating a fuel supply process by a second fuel supply line of the fuel supply system according to FIG. 1.
이하, 본 발명을 도면을 참조하여 보다 상세히 설명한다.Hereinafter, the present invention will be described in more detail with reference to the drawings.
도 1에는 본 발명의 일 실시예에 따른 연료 공급 시스템의 블록도가 도시되어 있다.1 is a block diagram of a fuel supply system according to an embodiment of the present invention.
도 1을 참조하면, 본 발명에 따른 연료 공급 시스템은 LPG 운반선(Liquefied Petroleum Gas Carrier)의 LPG 연료 엔진에 연료를 공급하기 위한 연료 공급 시스템으로서, LPG를 데이탱크로 공급하는 연료공급라인; 상기 연료공급라인으로부터 공급된 LPG를 저장한 후 LPG 연료 엔진에 공급하는 데이탱크(300); 및 상기 데이탱크(300)를 가압시키는 가압수단(310)을 포함할 수 있다.1, the fuel supply system according to the present invention is a fuel supply system for supplying fuel to the LPG fuel engine of the LPG carrier (Liquefied Petroleum Gas Carrier), a fuel supply line for supplying LPG to the day tank; A day tank 300 for storing the LPG supplied from the fuel supply line and supplying the LPG to the LPG fuel engine; And it may include a pressing means 310 for pressing the day tank 300.
[연료공급라인][Fuel Supply Line]
연료공급라인은 LPG 저장탱크(10)에서 발생한 BOG를 재액화시켜 생성된 LPG를 데이탱크(300)로 공급하는 재액화 플랜트(110)를 포함하는 제1 연료 공급라인(100); 및 LPG 저장탱크(10)에 저장된 LPG를 데이탱크(300)로 공급하는 제2 연료 공급라인(200) 중 선택되는 1종 이상의 연료 공급라인을 포함할 수 있다.The fuel supply line includes a first fuel supply line 100 including a reliquefaction plant 110 for supplying LPG generated by reliquefying the BOG generated in the LPG storage tank 10 to the day tank 300; And at least one fuel supply line selected from the second fuel supply line 200 supplying the LPG stored in the LPG storage tank 10 to the day tank 300.
[제1 연료 공급라인][First Fuel Supply Line]
상기 제1 연료 공급라인(100)은 LPG 저장탱크(10)에서 발생한 BOG를 재액화하여 형성된 LPG를 데이탱크(300)로 공급하는 연료 공급라인으로서, LPG 저장탱크(10)에서 발생한 BOG를 재액화시키는 재액화 플랜트(110)를 포함할 수 있다.The first fuel supply line 100 is a fuel supply line for supplying LPG formed by reliquefaction of the BOG generated in the LPG storage tank 10 to the day tank 300, and re-liquefies the BOG generated in the LPG storage tank 10. The liquefaction plant 110 may be included.
도 2에는 도 1에 따른 연료 공급 시스템의 제1 연료 공급라인(100)에 포함된 재액화 플랜트(110)의 블록도가 도시되어 있다.2 shows a block diagram of a reliquefaction plant 110 included in the first fuel supply line 100 of the fuel supply system according to FIG. 1.
상기 재액화 플랜트(110)는 LPG 저장탱크(10)에서 발생한 BOG를 압축시키는 컴프레서(compressor)(112); 및 상기 컴프레서(112)에서 압축된 BOG를 응축시키는 응축기(condenser)(114)를 포함할 수 있다.The reliquefaction plant 110 includes a compressor (112) for compressing the BOG generated in the LPG storage tank (10); And a condenser 114 for condensing the BOG compressed by the compressor 112.
상기 컴프레서는 제1 컴프레서(①), 제2 컴프레서(②) 및 제3 컴프레서(③)를 포함하는 3단 컴프레서인 것일 수 있다.The compressor may be a three stage compressor including a first compressor ①, a second compressor ②, and a third compressor ③.
한편, 상기 제1 컴프레서의 전단에는 LPG 저장탱크(10)에서 발생한 BOG로부터 액상 성분을 분리해내기 위한 녹아웃 드럼(Knock Out drum)(111)이 설치된 것일 수 있다. 상기 LPG 저장탱크(10)에서 발생한 BOG는 제1 컴프레서(①)로 흡입되기 전, 상기 녹아웃 드럼(111)에서 미스트(mist), 액적(droplet) 등의 액상 성분을 제거할 수 있다. 이에 따라, 컴프레서(112)로 유입되는 액상 성분을 효과적으로 차단하여 액상 성분으로 인한 컴프레서(112)의 수명 단축을 방지할 수 있다.On the other hand, the front of the first compressor may be a knock out drum (Knock Out drum) 111 for separating the liquid component from the BOG generated in the LPG storage tank 10 may be installed. BOG generated in the LPG storage tank 10 may remove liquid components, such as mist and droplets, from the knockout drum 111 before being sucked into the first compressor ①. Accordingly, it is possible to effectively block the liquid component flowing into the compressor 112 to prevent the shortening of the life of the compressor 112 due to the liquid component.
또한, 상기 제1 컴프레서(①)의 후단에는 제1 컴프레서(①)에서 1차 압축된 BOG를 냉각시키기 위한 인터쿨러(intermediate cooler)(113)가 설치될 수 있다. 상기 인터쿨러(113)에 의해 압축 과정에서 BOG의 온도가 상승하는 것을 방지할 수 있다.In addition, an intercooler 113 may be installed at a rear end of the first compressor ① to cool the BOG primary compressed by the first compressor ①. The intercooler 113 may prevent the temperature of the BOG from rising during the compression process.
상기 응축기(114)는 냉매를 이용하여, 상기 압축된 BOG를 응축시키는 것일 수 있으며, 상기 냉매는 해수(seawater, SW)인 것일 수 있다. 구체적으로, 상기 응축기에서는 25 ~ 35℃의 해수와 컴프레서(112)에서 압축된 BOG와의 열교환에 의해 BOG가 응축되어 재액화될 수 있으며, 이때 재액화된 BOG, 즉, LPG를 얻을 수 있다.The condenser 114 may be to condense the compressed BOG using a refrigerant, and the refrigerant may be seawater (SW). Specifically, in the condenser, BOG may be condensed and reliquefied by heat exchange between the seawater at 25 ° C. to 35 ° C. and the BOG compressed by the compressor 112. In this case, the reliquefied BOG, that is, LPG may be obtained.
상기 응축기(114)의 후단에는 BOG가 재액화되어 형성된 LPG를 저장한 후 데이탱크로 공급하기 위한 리시버(Receiver)(115)가 설치된 것일 수 있다.At the rear end of the condenser 114, a receiver 115 for storing LPG formed by reliquefaction of BOG and supplying the LPG to a day tank may be installed.
이때, 상기 리시버(115)에 저장된 LPG는 압력이 20~30bar의 고압인 상태로 데이탱크(300)로 공급될 수 있다. 또한, 상기 리시버(115)에 저장된 LPG는 인터쿨러(113)를 통해 냉각된 후 데이탱크(300)로 공급될 수도 있다.At this time, the LPG stored in the receiver 115 may be supplied to the day tank 300 at a high pressure of 20 ~ 30bar. In addition, the LPG stored in the receiver 115 may be supplied to the day tank 300 after being cooled through the intercooler 113.
[제2 연료 공급라인]Second Fuel Supply Line
상기 제2 연료 공급라인(200)은 LPG 저장탱크(10)에 저장된 LPG를 데이탱크(300)로 공급하는 연료 공급라인으로서, 상기 제2 연료 공급라인(200)은 LPG 저장탱크에 저장된 LPG를 가압하기 위한 적어도 하나의 펌프; 및 상기 가압된 LPG를 가열하기 위한 히터를 포함할 수 있다.The second fuel supply line 200 is a fuel supply line for supplying LPG stored in the LPG storage tank 10 to the day tank 300, and the second fuel supply line 200 supplies the LPG stored in the LPG storage tank. At least one pump for pressurizing; And it may include a heater for heating the pressurized LPG.
구체적으로, 상기 제2 연료 공급라인(200)은 LPG 저장탱크에 저장된 LPG를 펌핑하기 위한 카고펌프(210): 상기 LPG를 가압하기 위한 카고 부스터 펌프(220); 및 상기 가압된 LPG를 가열하기 위한 히터(230)를 포함할 수 있다.Specifically, the second fuel supply line 200 is a cargo pump 210 for pumping LPG stored in the LPG storage tank: a cargo booster pump 220 for pressurizing the LPG; And it may include a heater 230 for heating the pressurized LPG.
예를 들어, 상기 LPG 저장탱크(10)에 저장된 LPG는 0bar 및 -48℃인 상태에서, 상기 카고펌프(210)에 의해 펌핑되면서 데이탱크(300)에 7bar 및 -47℃ 상태로 펌핑될 수 있으며, 상기 카고 부스터 펌프(220)에 의해 가압되어 20bar 및 -42℃ 상태로 가압되고, 상기 히터에 의해 20bar 및 40℃ 로 가열되어 데이탱크(300)로 공급될 수 있다.For example, the LPG stored in the LPG storage tank 10 may be pumped by the cargo pump 210 in the state of 0bar and -48 ° C, and may be pumped to the day tank 300 at 7bar and -47 ° C. The pressurizer may be pressurized by the cargo booster pump 220 and pressurized to a state of 20 bar and −42 ° C., and heated to 20 bar and 40 ° C. by the heater to be supplied to the day tank 300.
상기 카고 부스터 펌프(220)는 1개가 사용될 수 있고, 복수의 카고 부스터 펌프(220)가 직렬 또는 병렬로 연결되어 사용될 수도 있다.One cargo booster pump 220 may be used, and a plurality of cargo booster pumps 220 may be used in series or in parallel.
예를 들어, 도 3에 도시된 바와 같이, 2개의 카고 부스터 펌프(220)가 연결되어 밸브 조작으로 인해 직렬 또는 병렬로 연결된 구조를 구현할 수 있으며, LPG를 고압으로 공급하고자 할 때 카고 부스터 펌프(200)를 직렬로 연결할 수 있다.For example, as shown in FIG. 3, two cargo booster pumps 220 may be connected to implement a structure connected in series or in parallel due to a valve operation, and when a cargo booster pump ( 200) can be connected in series.
[데이탱크][Day Tank]
데이탱크란, LPG 운반선의 LPG 저장탱크에 내장되어 있는 카고펌프를 이용하여 LPG 연료 엔진에 LPG를 공급하되, 상기 카고펌프에서 펌핑되는 LPG의 양을 조절하여 LPG 연료 엔진이 구동하는데 필요로 하는 연료의 양만큼 공급할 수 있도록 하는 탱크이다.The day tank is used to supply LPG to the LPG fuel engine using a cargo pump built in the LPG storage tank of the LPG carrier, but adjusts the amount of LPG pumped by the cargo pump to fuel the LPG fuel engine. It is a tank that can supply as much as.
본 발명에서의 데이탱크(300)는 특히, 그 내부 압력이 30 ~ 50 bar로 가압된 상태의 고압 탱크로서, 전술한 바와 같은 연료 공급라인을 통해 공급된 LPG를 고압인 상태로 저장할 수 있으므로, 데이탱크(300) 후단에 별도의 가압 수단 없이도 데이탱크에서 LPG 연료 엔진으로 LPG를 공급할 수 있다.In the present invention, the day tank 300 is a high-pressure tank in which the internal pressure is pressurized to 30 to 50 bar. In particular, the day tank 300 may store the LPG supplied through the fuel supply line as described above at a high pressure. LPG may be supplied to the LPG fuel engine from the day tank without a separate pressurizing means after the day tank 300.
한편, 상기 데이탱크(300) 후단에는 LPG의 온도를 LPG 연료 엔진의 요구 온도로 LPG를 가열할 수 있는 히터가 추가로 설치될 수 있다.On the other hand, after the day tank 300, a heater for heating the LPG to the required temperature of the LPG fuel engine may be additionally installed.
상기 데이탱크(300)를 고압 상태로 유지시켜줄 수 있는 가압수단은 데이탱크(300) 전단 또는 데이탱크(300)에 설치될 수 있다.Pressing means for maintaining the day tank 300 in a high pressure state may be installed in front of the day tank 300 or the day tank 300.
가압수단으로서, 데이탱크(300) 전단에 설치된 가압수단은 컴프레서 또는 펌프일 수 있다. As the pressurizing means, the pressurizing means installed in front of the day tank 300 may be a compressor or a pump.
데이탱크(300) 전단에 설치된 가압수단으로서, 컴프레서는 상기 제1 연료공라인의 재액화 플랜트(110)에 포함된 컴프레서(112)일 수 있으며, 상기 컴프레서(112)는 LPG 연료엔진의 요구 압력을 만족시킬 수 있는 고압 컴프레서일 수 있다. 예를 들어, 상기 컴프레서(112)에 의해 재액화 플랜트(110)에서 재액화되어 형성된 LPG는 LPG 연료엔진인 ME-LGI 엔진의 요구 압력, 30~50 bar의 압력을 나타낼 수 있다.As the pressurizing means installed in front of the day tank 300, the compressor may be a compressor 112 included in the reliquefaction plant 110 of the first fuel air line, the compressor 112 is the required pressure of the LPG fuel engine It can be a high pressure compressor that can satisfy. For example, the LPG formed by reliquefaction in the reliquefaction plant 110 by the compressor 112 may represent a required pressure of the LPG fuel engine, a pressure of 30 to 50 bar.
또한, 데이탱크(300) 전단에 설치된 가압수단으로서, 펌프는 상기 제1 연료공급라인의 재액화 플랜트(110)에서 재액화되어 형성된 LPG를 가압할 수 있다. In addition, as a pressurizing means installed in front of the day tank 300, the pump may pressurize the LPG formed by reliquefaction in the reliquefaction plant 110 of the first fuel supply line.
데이탱크(300)에 설치된 가압수단은 데이탱크(300)의 상부에 설치된 N2 공급시스템(310)일 수 있으며, N2 공급에 의해 데이탱크(300)의 내부압력을 고압인 상태로 유지할 수 있다. 이때, 상기 N2 공급시스템(310)은 N2 제너레이터(ganerator) 및 N2 가스 보틀(gas bottle) 중 선택되는 것일 수 있다.The pressurizing means installed in the day tank 300 may be an N 2 supply system 310 installed on the upper part of the day tank 300, and may maintain the internal pressure of the day tank 300 at a high pressure by N 2 supply. have. In this case, the N 2 supply system 310 may be selected from an N 2 generator and an N 2 gas bottle.
상기 LPG 연료 엔진은 ME-LGI 엔진일 수 있으며, 엔진에 공급된 LPG는 엔진 내부에서 고압을 분사될 수 있다.The LPG fuel engine may be a ME-LGI engine, and LPG supplied to the engine may be injected at a high pressure inside the engine.
본 발명은 또한, LPG 운반선의 LPG 연료 엔진에 연료를 공급하기 위한 연료 공급 방법으로서, LPG를 데이탱크로 공급하는 연료 공급단계; 및 상기 연료 공급단계로부터 공급된 LPG를 가압된 데이탱크에 저장한 후 LPG 연료 엔진에 공급하는 단계를 포함하되, 상기 데이탱크는 N2 공급에 의해 가압되는 것을 특징으로 하는 연료 공급 방법에 관한 것이다.The present invention also provides a fuel supply method for supplying fuel to the LPG fuel engine of the LPG carrier, the fuel supply step of supplying LPG to the day tank; And storing the LPG supplied from the fuel supplying step in a pressurized day tank and then supplying the LPG fuel engine to the LPG fuel engine, wherein the day tank is pressurized by N 2 supply. .
상기 연료 공급단계는 LPG 저장탱크에서 발생한 BOG를 재액화시켜 생성된 LPG를 고압 데이탱크로 공급하는 제1 연료 공급단계; 및 LPG 저장탱크에 저장된 LPG를 고압 데이탱크로 공급하는 제2 연료 공급단계중 선택되는 1종 이상의 연료 공급단계를 포함할 수 있다.The fuel supply step may include a first fuel supply step of supplying LPG generated by reliquefaction of BOG generated in the LPG storage tank to a high pressure day tank; And at least one fuel supply step selected from the second fuel supply step of supplying the LPG stored in the LPG storage tank to the high pressure day tank.
상기 제2 연료 공급단계는 LPG 저장탱크에 저장된 LPG를 가압하는 단계; 및 상기 가압된 LPG를 가열하는 단계를 포함할 수 있다.The second fuel supply step may include pressurizing the LPG stored in the LPG storage tank; And heating the pressurized LPG.
구체적으로, 상기 LPG 저장탱크에 저장된 LPG를 가압하는 단계는 상기 LPG 저장탱크에 저장된 LPG를 펌핑하는 단계; 및 상기 LPG를 가압하는 단계를 포함할 수 있다.Specifically, pressurizing the LPG stored in the LPG storage tank may include pumping the LPG stored in the LPG storage tank; And pressurizing the LPG.
상기 가압하는 단계는 카고 부스터 펌프를 이용하여 LPG를 가압하되, 상기 카고 부스터 펌프를 1개 사용하거나, 복수의 카고 부스터 펌프를 직렬 또는 병렬로 연결하여 가압 압력을 조절할 수 있다.The pressurizing may be performed by pressurizing the LPG using a cargo booster pump, by using one cargo booster pump, or by connecting a plurality of cargo booster pumps in series or in parallel to adjust the pressurized pressure.
상기 데이탱크는 데이탱크 전단 또는 데이탱크에 설치된 가압수단에 의해 가압되어, 그 내부 압력이 30 ~ 50 bar인 고압의 상태를 유지할 수 있으므로, 데이탱크를 거친 LPG를 별도로 가압하지 않고도 LPG 연료 엔진으로 공급할 수 있다.The day tank is pressurized by a press means installed in the front end of the day tank or the day tank, so that the internal pressure can be maintained at a high pressure of 30 to 50 bar, so that the LPG through the day tank without additional pressure to the LPG fuel engine Can supply
또한, 상기 데이탱크 후단에서 LPG를 가열하는 단계를 추가하여, LPG 연료 엔진의 요구 온도로 LPG를 가열할 수 있다.In addition, the LPG may be heated at the rear end of the day tank to heat the LPG to a required temperature of the LPG fuel engine.
본 발명은 또한, LPG를 저장한 후 엔진의 연료로 공급하는 데이탱크를 포함하는 LPG 운반선의 추진용 ME-LGI 엔진 공급용 연료 공급 시스템으로서, 상기 데이탱크의 상부에는 상기 데이탱크의 내부 압력을 ME-LGI의 요구 압력인 30 ~ 50 bar로 가압하는 N2 공급시스템이 설치된 것을 특징으로 하는 LPG 운반선의 추진용 ME-LGI 엔진 공급용 연료 공급 시스템에 관한 것이다.The present invention also provides a fuel supply system for supplying a MEG-LGI engine for propulsion of an LPG carrier including a day tank for storing LPG and supplying the fuel to an engine, wherein an internal pressure of the day tank is applied to an upper portion of the day tank. The present invention relates to a fuel supply system for supplying a ME-LGI engine for propulsion of an LPG carrier, wherein an N2 supply system pressurizes the required pressure of the ME-LGI to 30 to 50 bar.
상기 LPG는 LPG 저장탱크에서 발생한 BOG를 재액화시켜 생성된 LPG를 데이탱크로 공급하는 재액화 플랜트를 포함하는 제1 연료 공급라인; 및 LPG 저장탱크에 저장된 LPG를 데이탱크로 공급하는 제2 연료 공급라인 중 선택되는 1종 이상의 연료 공급라인에 의해 공급될 수 있다.The LPG may include a first fuel supply line including a reliquefaction plant for supplying LPG generated by reliquefying the BOG generated in the LPG storage tank to a day tank; And a second fuel supply line for supplying LPG stored in the LPG storage tank to the day tank.
본 발명은 또한, LPG를 데이탱크에 저장한 후 ME-LGI 엔진에 공급하는 LPG 운반선의 추진용 ME-LGI 엔진 공급용 연료 공급 방법으로서, 상기 데이탱크는 N2 공급에 의해 내부 압력이 ME-LGI의 요구 압력과 동등 수준인 30 ~ 50 bar으로 가압되는 것일 수 있다.The present invention also provides a fuel supply method for supplying a MEG-LGI engine for propulsion of an LPG carrier that stores LPG in a day tank and supplies the MEG-LGI engine, wherein the day tank has an internal pressure of ME- by a N 2 supply. It may be pressurized to 30-50 bar, which is equivalent to the required pressure of the LGI.
이상과 같이 본 발명에 따른 연료 공급 시스템 및 연료 공급 방법을, 예시된 도면을 참조하여 설명하였으나, 본 발명은 이상에서 설명된 실시예와 도면에 의해 한정되지 않으며, 특허청구범위 내에서 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자들에 의해 다양한 수정 및 변형이 이루어질 수 있음은 물론이다.As described above, the fuel supply system and the fuel supply method according to the present invention have been described with reference to the illustrated drawings, but the present invention is not limited to the embodiments and drawings described above, and the present invention is within the claims. Of course, various modifications and variations can be made by those skilled in the art.

Claims (26)

  1. LPG 운반선(Liquefied Petroleum Gas Carrier)의 LPG 연료 엔진에 연료를 공급하기 위한 연료 공급 시스템으로서,A fuel supply system for fueling LPG fuel engines of the Liquefied Petroleum Gas Carrier,
    LPG를 데이탱크로 공급하는 연료공급라인;A fuel supply line for supplying LPG to the day tank;
    상기 연료공급라인으로부터 공급된 LPG를 저장한 후 LPG 연료 엔진에 공급하는 데이탱크; 및A day tank storing LPG supplied from the fuel supply line and supplying the LPG to the LPG fuel engine; And
    상기 데이탱크를 가압시키는 가압수단을 포함하는 연료 공급 시스템.And a pressurizing means for pressurizing the day tank.
  2. 제1항에 있어서,The method of claim 1,
    상기 가압수단은 데이탱크 전단 또는 데이탱크에 설치된 것을 특징으로 하는 연료 공급 시스템.The pressurizing means is a fuel supply system, characterized in that installed in the front end of the day tank or day tank.
  3. 제2항에 있어서,The method of claim 2,
    상기 데이탱크 전단에 설치된 가압수단은 컴프레서 또는 펌프인 것을 특징으로 하는 연료 공급 시스템.The pressurizing means installed in front of the day tank is a compressor or a pump, characterized in that the pump.
  4. 제2항에 있어서,The method of claim 2,
    상기 데이탱크에 설치된 가압수단은 N2 공급시스템인 것을 특징으로 하는 연료 공급 시스템.The pressurization means installed in the day tank is a fuel supply system, characterized in that the N 2 supply system.
  5. 제4항에 있어서, The method of claim 4, wherein
    상기 N2 공급시스템은 N2 제너레이터(generator) 또는 N2 가스 보틀(gas bottle)인 것을 특징으로 하는 연료 공급 시스템.The N 2 supply system is a fuel supply system, characterized in that the N 2 generator (generator) or N 2 gas bottle (gas bottle).
  6. 제1항에 있어서,The method of claim 1,
    상기 연료 공급라인은The fuel supply line
    LPG 저장탱크에서 발생한 BOG를 재액화시켜 생성된 LPG를 데이탱크로 공급하는 재액화 플랜트를 포함하는 제1 연료 공급라인; 및 A first fuel supply line including a reliquefaction plant for supplying LPG generated by reliquefying BOG generated in the LPG storage tank to a day tank; And
    LPG 저장탱크에 저장된 LPG를 데이탱크로 공급하는 제2 연료 공급라인 중 선택되는 1종 이상의 연료 공급라인을 포함하는 것을 특징으로 하는 연료 공급 시스템.A fuel supply system comprising at least one fuel supply line selected from the second fuel supply line for supplying the LPG stored in the LPG storage tank to the day tank.
  7. 제6항에 있어서,The method of claim 6,
    상기 제1 연료 공급라인에서 BOG를 재액화시켜 생성된 LPG는 -13 ~ 40℃인 것을 특징으로 하는 연료 공급 시스템.LPG generated by re-liquefying the BOG in the first fuel supply line is a fuel supply system, characterized in that -13 ~ 40 ℃.
  8. 제6항에 있어서,The method of claim 6,
    상기 제2 연료 공급라인은The second fuel supply line
    LPG 저장탱크에 저장된 LPG를 가압하기 위한 적어도 하나의 펌프; 및At least one pump for pressurizing the LPG stored in the LPG storage tank; And
    상기 LPG를 가열하기 위한 히터를 포함하는 것을 특징으로 하는 연료 공급 시스템.And a heater for heating the LPG.
  9. 제8항에 있어서,The method of claim 8,
    상기 적어도 하나의 펌프는The at least one pump
    LPG 저장탱크에 저장된 LPG를 펌핑하기 위한 카고펌프(cargo pump): 및Cargo pump for pumping LPG stored in LPG storage tank:
    상기 LPG를 가압하기 위한 카고 부스터 펌프(cargo booster pump) 중 선택되는 1종 이상인 것을 특징으로 하는 연료 공급 시스템.Fuel supply system, characterized in that at least one selected from the cargo booster pump (cargo booster pump) for pressurizing the LPG.
  10. 제9항에 있어서,The method of claim 9,
    상기 카고 부스터 펌프는 직렬 또는 병렬로 연결된 것을 특징으로 하는 연료 공급 시스템.The cargo booster pump is connected in series or in parallel.
  11. 제1항에 있어서,The method of claim 1,
    상기 데이탱크의 후단에 히터가 추가로 설치된 것을 특징으로 하는 연료 공급 시스템.A fuel supply system, characterized in that the heater is further installed on the rear end of the day tank.
  12. 제1항에 있어서,The method of claim 1,
    상기 데이탱크는 내부 압력이 30 ~ 50 bar인 것을 특징으로 하는 연료 공급 시스템.The day tank has a fuel supply system, characterized in that the internal pressure of 30 ~ 50 bar.
  13. 제1항에 있어서,The method of claim 1,
    상기 LPG 연료 엔진은 ME-LGI 엔진인 것을 특징으로 하는 연료 공급 시스템.The LPG fuel engine is a fuel supply system, characterized in that the ME-LGI engine.
  14. LPG 운반선(Liquefied Petroleum Gas Carrier)의 LPG 연료 엔진에 연료를 공급하기 위한 연료 공급 방법으로서,As a fuel supply method for fueling the LPG fuel engine of the LPG carrier (Liquefied Petroleum Gas Carrier),
    LPG를 데이탱크로 공급하는 연료 공급단계; 및A fuel supply step of supplying LPG to the day tank; And
    상기 연료 공급단계로부터 공급된 LPG를 가압된 데이탱크에 저장한 후 LPG 연료 엔진에 공급하는 단계를 포함하되,Storing the LPG supplied from the fuel supply step in a pressurized day tank and supplying the LPG fuel engine to the LPG fuel engine,
    상기 데이탱크는 가압수단에 의해 가압되는 것을 특징으로 하는 연료 공급 방법.The day tank is a fuel supply method characterized in that the pressurized by the pressing means.
  15. 제14항에 있어서,The method of claim 14,
    상기 데이탱크는 데이탱크 전단 또는 데이탱크에 설치된 가압수단에 의해 가압되는 것을 특징으로 하는 연료 공급 방법.The day tank is a fuel supply method characterized in that the pressurized means installed in the front end of the day tank or the day tank.
  16. 제15항에 있어서,The method of claim 15,
    상기 데이탱크 전단에 설치된 가압수단은 컴프레서 또는 펌프인 것을 특징으로 하는 연료 공급 방법.The pressurizing means installed in the front end of the day tank is a fuel supply method, characterized in that the compressor or pump.
  17. 제15항에 있어서,The method of claim 15,
    상기 데이탱크에 설치된 가압수단은 N2 공급시스템인 것을 특징으로 하는 연료 공급 방법.The pressurizing means installed in the day tank is a fuel supply method characterized in that the N 2 supply system.
  18. 제14항에 있어서,The method of claim 14,
    상기 연료 공급단계는The fuel supply step
    LPG 저장탱크에서 발생한 BOG를 재액화시켜 생성된 LPG를 고압 데이탱크로 공급하는 제1 연료 공급단계; 및 A first fuel supply step of supplying LPG generated by reliquefying the BOG generated in the LPG storage tank to the high pressure day tank; And
    LPG 저장탱크에 저장된 LPG를 고압 데이탱크로 공급하는 제2 연료 공급단계중 선택되는 1종 이상의 연료 공급단계를 포함하는 것을 특징으로 하는 연료 공급 방법.A fuel supply method comprising at least one fuel supply step selected from the second fuel supply step of supplying the LPG stored in the LPG storage tank to the high pressure day tank.
  19. 제18항에 있어서,The method of claim 18,
    상기 제2 연료 공급단계는The second fuel supply step
    LPG 저장탱크에 저장된 LPG를 펌핑하는 단계; Pumping the LPG stored in the LPG storage tank;
    상기 펌핑된 LPG를 가압하는 단계; 및Pressurizing the pumped LPG; And
    상기 가압된 LPG를 가열하는 단계를 포함하는 것을 특징으로 하는 연료 공급 방법.And heating the pressurized LPG.
  20. 제14항에 있어서,The method of claim 14,
    상기 데이탱크는 내부 압력이 30 ~ 50 bar가 되도록 가압되는 것을 특징으로 하는 연료 공급 방법.The day tank is a fuel supply method characterized in that the internal pressure is pressed to 30 ~ 50 bar.
  21. 제14항에 있어서,The method of claim 14,
    상기 데이탱크 후단에서 LPG를 가열하는 단계를 추가로 포함하는 것을 특징으로 하는 연료 공급 방법.And fueling the LPG at the rear end of the day tank.
  22. 제14항에 있어서,The method of claim 14,
    상기 LPG 연료 엔진은 ME-LGI 엔진인 것을 특징으로 하는 연료 공급 방법.The LPG fuel engine is a fuel supply method, characterized in that the ME-LGI engine.
  23. LPG를 저장한 후 엔진의 연료로 공급하는 데이탱크를 포함하는 LPG 운반선의 추진용 ME-LGI 엔진 공급용 연료 공급 시스템으로서,A fuel supply system for supplying a ME-LGI engine for propulsion of an LPG carrier including a day tank for storing and supplying LPG as fuel for an engine,
    상기 데이탱크의 상부에는 상기 데이탱크의 내부 압력을 ME-LGI의 요구 압력인 30 ~ 50 bar로 가압하는 N2 공급시스템이 설치된 것을 특징으로 하는 LPG 운반선의 추진용 ME-LGI 엔진 공급용 연료 공급 시스템.A fuel supply for supplying a MEG-LGI engine for supplying a LPG carrier, wherein an N 2 supply system for pressurizing the internal pressure of the day tank to 30 to 50 bar, which is a required pressure of the ME-LGI, is installed at an upper portion of the day tank. system.
  24. 제23항에 있어서,The method of claim 23, wherein
    상기 LPG는The LPG is
    LPG 저장탱크에서 발생한 BOG를 재액화시켜 생성된 LPG를 데이탱크로 공급하는 재액화 플랜트를 포함하는 제1 연료 공급라인; 및 A first fuel supply line including a reliquefaction plant for supplying LPG generated by reliquefying BOG generated in the LPG storage tank to a day tank; And
    LPG 저장탱크에 저장된 LPG를 데이탱크로 공급하는 제2 연료 공급라인 중 선택되는 1종 이상의 연료 공급라인에 의해 공급되는 것을 특징으로 하는 연료 공급 시스템.A fuel supply system, characterized in that supplied by at least one fuel supply line selected from the second fuel supply line for supplying the LPG stored in the LPG storage tank to the day tank.
  25. LPG를 데이탱크에 저장한 후 ME-LGI 엔진에 공급하는 LPG 운반선의 추진용 ME-LGI 엔진 공급용 연료 공급 방법으로서, As a fuel supply method for supplying a MEG-LGI engine for propulsion of an LPG carrier that stores LPG in a day tank and supplies it to the ME-LGI engine.
    상기 데이탱크는 N2 공급에 의해 내부 압력이 ME-LGI의 요구 압력과 동등 수준인 30 ~ 50 bar으로 가압되는 것을 특징으로 하는 LPG 운반선의 추진용 ME-LGI 엔진 공급용 연료 공급 방법.The day tank is fuel supply method for supplying the ME-LGI engine for the propulsion of the LPG carrier, characterized in that the internal pressure is pressurized to 30 ~ 50 bar, the level equivalent to the required pressure of the ME-LGI by N 2 supply.
  26. 제1항 내지 제13항 중 어느 한 항의 연료 공급 시스템을 포함하는 LPG 운반선.An LPG carrier comprising the fuel supply system of claim 1.
PCT/KR2015/004543 2014-05-16 2015-05-07 Fuel supply system and fuel supply method of lpg carrier WO2015174681A1 (en)

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