KR101012642B1 - System and method for supplying fuel in ship - Google Patents

System and method for supplying fuel in ship Download PDF

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KR101012642B1
KR101012642B1 KR1020080058025A KR20080058025A KR101012642B1 KR 101012642 B1 KR101012642 B1 KR 101012642B1 KR 1020080058025 A KR1020080058025 A KR 1020080058025A KR 20080058025 A KR20080058025 A KR 20080058025A KR 101012642 B1 KR101012642 B1 KR 101012642B1
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South Korea
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lpg
fuel
fuel supply
ship
main engine
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KR1020080058025A
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Korean (ko)
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KR20090131990A (en
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손관원
권순빈
양헌용
김남수
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대우조선해양 주식회사
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
    • F02M21/0245—High pressure fuel supply systems; Rails; Pumps; Arrangement of valves
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
    • F02M21/023—Valves; Pressure or flow regulators in the fuel supply or return system
    • F02M21/0239—Pressure or flow regulators therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
    • F02M21/023—Valves; Pressure or flow regulators in the fuel supply or return system
    • F02M21/0242—Shut-off valves; Check valves; Safety valves; Pressure relief valves
    • 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
    • F02M37/0047—Layout or arrangement of systems for feeding fuel
    • F02M37/0052—Details on the fuel return circuit; Arrangement of pressure regulators
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/30—Use of alternative fuels, e.g. biofuels

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Ocean & Marine Engineering (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)

Abstract

본 발명은 선박의 연료 공급 시스템에 관한 것으로, 선박의 메인 엔진에 연료를 공급하는 시스템으로서, LPG를 가압하여 연료로서 저장하는 LPG 연료 저장용 가압 탱크와, 상기 LPG 연료 저장용 가압 탱크의 하부로부터 LPG를 빼내어서 고압으로 압축한 후 상기 메인 엔진으로 공급하는 LPG 연료 공급라인과, 상기 LPG 연료 공급라인에서 고압으로 압축된 LPG를 부피 증가시켜서 상기 LPG 연료 저장용 가압 탱크로 복귀시키도록 상기 LPG 연료 공급라인의 도중에서 분기된 LPG 복귀라인을 포함하는 것을 특징으로 한다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fuel supply system of a ship, comprising: a system for supplying fuel to a ship's main engine, the LPG fuel storing pressurizing tank storing pressurized LPG as fuel and a lower portion of the LPG fuel storing pressurizing tank; The LPG fuel is supplied to the LPG fuel supply line for supplying the main engine to the main engine after the LPG is extracted and compressed at high pressure, and the LPG fuel is returned to the LPG fuel storage pressurized tank by increasing the volume of the LPG compressed at high pressure in the LPG fuel supply line. And an LPG return line branched in the middle of the supply line.

LPG 연료 저장용 가압 탱크, LPG 연료 공급라인, LPG 복귀라인 LPG fuel storage pressurized tank, LPG fuel supply line, LPG return line

Description

선박의 연료 공급 시스템 및 방법{SYSTEM AND METHOD FOR SUPPLYING FUEL IN SHIP}Fuel supply system and method of ship {SYSTEM AND METHOD FOR SUPPLYING FUEL IN SHIP}

본 발명은 선박의 연료 공급 시스템 및 방법에 관한 것으로서, 더욱 상세하게는, 벌크화물선, 컨테이너선, 화학제품운반선, 원유운반선, 정제유운반선 등의 선박에서 메인 엔진으로 연료를 공급하는 선박의 연료 공급 시스템 및 방법에 관한 것이다.The present invention relates to a fuel supply system and method of a ship, and more particularly, a fuel supply system of a ship that supplies fuel to a main engine in a ship such as a bulk cargo ship, a container ship, a chemical carrier, a crude oil carrier, a refinery oil carrier, etc. And to a method.

일반적으로, 벌크화물선, 컨테이너선, 화학제품운반선, 원유운반선, 정제유운반선 등의 선박에서는 선박의 추진 연료로서 벙커C유 등의 중유를 사용하는 연료 공급 시스템을 채용하고 있는데, 이러한 중유 연료 공급 시스템은 중유 연료 사용에 따른 배기가스의 방출로 인한 환경오염 규제의 강화로 황 성분이 적은 중유 연료 탱크(LSHFO tank)를 별도로 설치해야 하므로, 보다 친환경적인 신개념의 연료 공급 시스템을 개발할 필요성이 있다.In general, a bulk supply ship, such as a bulk cargo ship, a container ship, a chemical carrier, a crude oil carrier, and a refinery carrier, employs a fuel supply system using heavy oil such as bunker C oil as a propulsion fuel of the ship. Due to the tightening of environmental pollution regulations due to the emission of exhaust gas by using heavy oil fuel, it is necessary to separately install a low sulfur sulfur fuel tank (LSHFO tank), so it is necessary to develop a new eco-friendly fuel supply system.

따라서, 본 발명은, 이러한 종래기술의 필요성을 충족시키기 위한 것으로서, LPG를 메인 엔진의 연료로서 사용할 수 있도록 구성된 선박의 연료 공급 시스템 및 방법을 제공하는 것을 그 목적으로 한다. Accordingly, an object of the present invention is to provide a fuel supply system and method for a ship configured to be able to use LPG as a fuel of a main engine, in order to satisfy the necessity of the prior art.

전술한 목적을 달성하기 위해, 본 발명의 선박의 연료 공급 시스템은, 선박의 메인 엔진에 연료를 공급하는 시스템으로서, LPG를 가압하여 연료로서 저장하는 LPG 연료 저장용 가압 탱크와, 상기 LPG 연료 저장용 가압 탱크로부터 LPG를 빼내어서 고압으로 압축한 후 상기 메인 엔진으로 공급하는 LPG 연료 공급라인과, 상기 LPG 연료 공급라인에서 고압으로 압축된 LPG를 부피 증가시켜서 상기 LPG 연료 저장용 가압 탱크로 복귀시키도록 상기 LPG 연료 공급라인의 도중에서 분기된 LPG 복귀라인을 포함하는 것을 특징으로 한다.In order to achieve the above object, the ship fuel supply system of the present invention is a system for supplying fuel to the ship's main engine, an LPG fuel storage pressure tank for pressurizing and storing LPG as fuel, and the LPG fuel storage LPG was removed from the pressure tank for compression and compressed to high pressure, and the LPG fuel supply line supplied to the main engine and the LPG compressed at high pressure in the LPG fuel supply line were increased in volume to return to the pressure tank for storing LPG fuel. It characterized in that it comprises a LPG return line branched in the middle of the LPG fuel supply line.

또한, 본 발명의 선박의 연료 공급 방법은, 선박의 메인 엔진에 연료를 공급하는 방법으로서, LPG 연료 저장용 가압 탱크에 LPG를 가압하여 연료로서 저장하고, 상기 LPG 연료 저장용 가압 탱크로부터 LPG를 빼내어서 고압으로 압축한 후 상기 메인 엔진으로 공급하되, 상기 LPG 연료 공급라인에서 고압으로 압축된 LPG를 부피 증가시켜서 상기 LPG 연료 저장용 가압 탱크로 복귀시키는 것을 특징으로 한다.In addition, the fuel supply method of the ship of the present invention is a method for supplying fuel to the main engine of the ship, pressurized LPG to the LPG fuel storage pressure tank and stored as fuel, LPG from the LPG fuel storage pressure tank After the extraction is compressed to high pressure and supplied to the main engine, it is characterized by returning to the LPG fuel storage pressurized tank by increasing the volume of LPG compressed at high pressure in the LPG fuel supply line.

전술한 바와 같이, 본 발명의 선박의 연료 공급 시스템 및 방법에 의하면, 선박에서 LPG를 메인 엔진의 연료로서 사용하므로, 환경 오염을 일으키는 배기가스의 방출이 중유 연료 사용에 비해 감소되는 이점이 있다.As described above, according to the ship fuel supply system and method of the present invention, since LPG is used as the fuel of the main engine in the ship, there is an advantage that the emission of the exhaust gas causing environmental pollution is reduced compared to the use of heavy oil fuel.

특히, 본 발명에서는 LPG 연료 저장용 탱크를 가압 탱크로 설계하고, LPG를 고압으로 압축하여 메인 엔진으로 공급하되, 메인 엔진으로 공급되는 고압의 LPG 중 일부를 부피 증가시켜서 LPG 연료 저장용 가압 탱크로 복귀시켜 LPG 연료 저장용 가압 탱크를 가압시킴으로써 경제적인 설계를 도모하고, LPG 연료 저장용 가압 탱크를 사용함으로써 LPG 연료 저장용 탱크 내에 별도의 LPG 공급 펌프를 설치하지 않고도 LPG 연료 저장용 탱크 내의 LPG를 LPG 연료 공급라인으로 공급할 수 있는 이점이 있다.Particularly, in the present invention, the LPG fuel storage tank is designed as a pressurized tank, and the LPG is compressed to a high pressure and supplied to the main engine, and the volume of some of the high pressure LPG supplied to the main engine is increased to a pressurized tank for storing the LPG fuel. Returning to pressurizing the LPG fuel storage pressurized tank for economical design, and by using the LPG fuel storage pressurized tank, LPG in the LPG fuel storage tank can be removed without installing a separate LPG feed pump in the LPG fuel storage tank. There is an advantage that can be supplied to the LPG fuel supply line.

이하, 첨부된 도면을 참조로 하여 본 발명의 바람직한 실시예를 설명하기로 한다.Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

도 1은 본 발명의 실시예에 따른 선박의 연료 공급 시스템의 개략적인 구성도이다. 도시된 바와 같이, 본 발명의 실시예에 따른 선박의 연료 공급 시스템은 벌크화물선, 컨테이너선, 화학제품운반선, 원유운반선, 정제유운반선 등의 선박의 메인 엔진에 연료를 공급하기 위한 것이다.1 is a schematic configuration diagram of a fuel supply system of a ship according to an embodiment of the present invention. As shown, the fuel supply system of the ship according to an embodiment of the present invention is for supplying fuel to the main engine of the ship, such as bulk cargo ship, container ship, chemical transport ship, crude oil transport ship, refinery transport ship.

본 발명의 연료 공급 시스템은, LPG 연료 저장용 가압 탱크(1)와 LPG 연료 공급라인(L1)과 LPG 복귀라인(L2)을 포함한다.The fuel supply system of the present invention includes a pressurized tank 1 for storing LPG fuel, an LPG fuel supply line L1, and an LPG return line L2.

LPG 연료 저장용 가압 탱크(1)는 LPG를 가압하여 연료로서 저장한다.The pressure tank 1 for storing LPG fuel pressurizes LPG and stores it as fuel.

LPG 연료 공급라인(L1)은 LPG 연료 저장용 가압 탱크(1)의 하부로부터 LPG를 빼내어서 고압으로 압축한 후 메인 엔진(2)으로 공급한다.The LPG fuel supply line L1 extracts LPG from the lower part of the LPG fuel storage pressurized tank 1, compresses the LPG to a high pressure, and then supplies the LPG to the main engine 2.

LPG 연료 공급라인(L1)의 도중에는 압축 수단(4)이 설치되어 있다.A compression means 4 is provided in the middle of the LPG fuel supply line L1.

본 실시예에서, 메인 엔진(2)은 예를 들어, MAN B&W Diesel 사에서 제조하여 판매하는 ME-GI 엔진 등의 고압 연료 분사 엔진인 것이 바람직하다.In the present embodiment, the main engine 2 is preferably a high pressure fuel injection engine such as a ME-GI engine manufactured and sold by MAN B & W Diesel.

압축 수단(4)은 LPG 연료 공급라인(L1)의 도중에 설치되어 LPG 연료 저장용 가압 탱크(1)로부터 공급되는 LPG를 고압으로 압축하여 메인 엔진(2)으로 보낸다. LPG가 ME-GI 엔진의 연료로서 사용되기 위해서는 200 바(게이지압) 내지 450 바(게이지압), 바람직하게는, 400 바(게이지압)로 압축되어야 한다. 따라서, 본 실시예에서, 압축 수단(4)은 LPG를 200 바(게이지압) 내지 450 바(게이지압), 바람직하게는, 400 바(게이지압)로 압축시키는 부스터 펌프인 것이 바람직하다.The compression means 4 is installed in the middle of the LPG fuel supply line L1 to compress the LPG supplied from the pressure tank 1 for storing the LPG fuel to a high pressure and send it to the main engine 2. LPG must be compressed to 200 bar (gauge pressure) to 450 bar (gauge pressure), preferably 400 bar (gauge pressure) in order to be used as fuel in a ME-GI engine. Therefore, in this embodiment, the compression means 4 is preferably a booster pump that compresses the LPG from 200 bar (gauge pressure) to 450 bar (gauge pressure), preferably 400 bar (gauge pressure).

LPG 복귀라인(L2)은 LPG 연료 공급라인(L1)의 도중에서 분기되어 LPG 연료 저장용 가압 탱크(1)의 상부에 연결되어 있으며, LPG 연료 공급라인(L1)에서 고압으로 압축된 LPG를 부피 증가시켜서 LPG 연료 저장용 가압 탱크(1)로 복귀시킨다.LPG return line (L2) is branched in the middle of the LPG fuel supply line (L1) is connected to the upper portion of the pressure tank (1) for storing LPG fuel, LPG compressed by the high pressure in the LPG fuel supply line (L1) And return to the pressurized tank 1 for LPG fuel storage.

LPG 복귀라인(L2)의 도중에는 부피 증가 수단이 설치되어 있다. 이 부피 증가 수단은 기화기, 팽창 밸브 또는 감압 밸브일 수 있다. 본 실시예에서는 부피 증가 수단이 기화기(8)인 것으로 예시하였다.A volume increasing means is provided in the middle of the LPG return line L2. This volume increasing means may be a vaporizer, an expansion valve or a pressure reducing valve. In this embodiment, the volume increasing means is illustrated as a vaporizer (8).

압축 수단(4)의 전단의 연료 공급라인(L1)에는 유량 조절 밸브(6)가 설치되어 있고, LPG 연료 공급라인(L1)과 LPG 복귀라인(L2)의 분기점의 하류의 LPG 연료 공급라인(L1)과 LPG 복귀라인(L2)에도 각각 유량 조절 밸브(6)가 설치되어 있다. 유량 조절 밸브(6)는 메인 엔진(2)의 부하 변경을 고려하여 메인 엔진(2)에 연료로서 공급되는 LPG의 양을 조절한다.The flow rate control valve 6 is provided in the fuel supply line L1 in front of the compression means 4, and the LPG fuel supply line downstream of the branch point of the LPG fuel supply line L1 and the LPG return line L2 ( The flow regulating valve 6 is provided in L1) and LPG return line L2, respectively. The flow regulating valve 6 adjusts the amount of LPG supplied as fuel to the main engine 2 in consideration of the load change of the main engine 2.

기화기(8)의 전단의 LPG 공급라인(L2)에는 압력 조절 밸브(9)가 설치되어 있 다. 압력 조절 밸브(9)는 기화기(8)에 의해 기화되어 LPG 연료 저장용 가압 탱크(1)로 복귀되는 기화 LPG의 압력을 조절한다.The pressure regulating valve 9 is installed in the LPG supply line L2 in front of the vaporizer 8. The pressure regulating valve 9 regulates the pressure of the vaporized LPG which is vaporized by the vaporizer 8 and returned to the pressure tank 1 for storing LPG fuel.

LPG 연료 저장용 가압 탱크(1)는, 도시하지는 않았지만, 노출 갑판 상에 설치되거나 화물창 또는 화물탱크 내에 설치될 수 있다. 선박의 화물 선적 공간을 확보하기 위해서는 선박의 노출 갑판에 설치되는 것이 바람직하다.Although not shown, the pressurized tank 1 for storing LPG fuel may be installed on an exposed deck or installed in a cargo hold or a cargo tank. In order to secure the cargo loading space of the ship is preferably installed on the exposed deck of the ship.

본 발명에 의하면, 선박에서 LPG를 메인 엔진의 연료로서 사용하므로, 환경 오염을 일으키는 배기가스의 방출이 중유 연료 사용에 비해 감소된다.According to the present invention, since LPG is used as a fuel of the main engine in ships, the emission of exhaust gas which causes environmental pollution is reduced compared to the use of heavy oil fuel.

특히, 본 발명에서는 LPG 연료 저장용 탱크를 가압 탱크로 설계하고, LPG를 고압으로 압축하여 메인 엔진으로 공급하되, 메인 엔진으로 공급되는 고압의 LPG 중 일부를 부피 증가시켜서 LPG 연료 저장용 가압 탱크로 복귀시켜 LPG 연료 저장용 가압 탱크를 가압시킴으로써 경제적인 설계를 도모하고, LPG 연료 저장용 가압 탱크를 사용함으로써 LPG 연료 저장용 탱크 내에 별도의 LPG 공급 펌프를 설치하지 않고도 LPG 연료 저장용 탱크 내의 LPG를 LPG 연료 공급라인으로 공급할 수 있다.Particularly, in the present invention, the LPG fuel storage tank is designed as a pressurized tank, and the LPG is compressed to a high pressure and supplied to the main engine, and the volume of some of the high pressure LPG supplied to the main engine is increased to a pressurized tank for storing the LPG fuel. Returning to pressurizing the LPG fuel storage pressurized tank for economical design, and by using the LPG fuel storage pressurized tank, LPG in the LPG fuel storage tank can be removed without installing a separate LPG feed pump in the LPG fuel storage tank. Can be fed to LPG fuel supply lines.

이상에서는 본 발명이 특정 실시예를 중심으로 하여 설명되었지만, 본 발명의 취지 및 첨부된 특허청구범위 내에서 다양한 변형, 변경 또는 수정이 당해 기술분야에서 있을 수 있으며, 따라서, 전술한 설명 및 도면은 본 발명의 기술사상을 한정하는 것이 아닌 본 발명을 예시하는 것으로 해석되어져야 한다.While the invention has been described above with reference to specific embodiments, various modifications, changes or modifications may be made in the art within the spirit and scope of the appended claims, and thus, the foregoing description and drawings It should be construed as illustrating the present invention rather than limiting the technical spirit of the present invention.

도 1은 본 발명의 실시예에 따른 선박의 연료 공급 시스템의 개략도이다.1 is a schematic diagram of a fuel supply system of a ship according to an embodiment of the present invention.

Claims (10)

선박의 메인 엔진에 연료를 공급하는 시스템으로서, A system for supplying fuel to the ship's main engine, LPG를 가압하여 연료로서 저장하는 LPG 연료 저장용 가압 탱크와; A pressurized tank for storing LPG fuel by pressurizing and storing the LPG as fuel; 상기 LPG 연료 저장용 가압 탱크로부터 배출된 LPG를 상기 메인 엔진으로 공급하는 LPG 연료 공급라인과; LPG fuel supply line for supplying the LPG discharged from the pressure tank for storing LPG fuel to the main engine; 상기 LPG 연료 공급라인의 도중에 설치되어 상기 LPG 연료 저장용 가압 탱크로부터 상기 메인 엔진으로 공급되는 LPG를 고압으로 압축하는 압축 수단과; Compression means installed in the middle of the LPG fuel supply line to compress the LPG supplied from the pressure tank for storing LPG fuel to the main engine at a high pressure; 상기 LPG 연료 공급라인에 설치된 상기 압축 수단의 하류측에서 상기 LPG 연료 공급라인으로부터 분기되며, 상기 메인 엔진으로 공급되는 LPG 중 일부를 상기 LPG 연료 저장용 가압 탱크로 복귀시키는 LPG 복귀라인과; An LPG return line branched from the LPG fuel supply line on a downstream side of the compression means installed in the LPG fuel supply line, and returning a portion of the LPG supplied to the main engine to the pressure tank for storing the LPG fuel; 상기 LPG 복귀라인의 도중에 설치되며, 상기 압축 수단에 의해 고압으로 압축된 LPG를 부피 증가시켜 상기 LPG 연료 저장용 가압 탱크에 복귀시킴으로써 상기 LPG 연료 저장용 가압 탱크를 가압시키는 부피 증가 수단; A volume increasing means installed in the middle of the LPG return line and pressurizing the LPG fuel storage pressurized tank by increasing the volume of LPG compressed by the compression means to return to the LPG fuel storage pressurized tank; 을 포함하며, Including; 상기 메인 엔진은 고압 연료 분사 엔진이고, 상기 압축 수단은 응축된 LPG를 200 바(게이지압) 내지 450 바(게이지압)로 압축시키는 부스터 펌프인 것을 특징으로 하는 선박의 연료 공급 시스템.The main engine is a high pressure fuel injection engine, and the compression means is a booster pump for compressing the condensed LPG from 200 bar (gauge pressure) to 450 bar (gauge pressure). 삭제delete 삭제delete 청구항 1에 있어서,The method according to claim 1, 상기 압축 수단의 전단의 상기 LPG 연료 공급라인에는 유량 조절 밸브가 설치되고, 상기 LPG 연료 공급라인과 상기 LPG 복귀라인의 분기점의 하류의 상기 LPG 연료 공급라인과 상기 LPG 복귀라인에도 각각 유량 조절 밸브가 설치된 것을 특징으로 하는 선박의 연료 공급 시스템.A flow rate control valve is installed in the LPG fuel supply line in front of the compression means, and a flow rate control valve is also provided in the LPG fuel supply line and the LPG return line downstream of the branch point of the LPG fuel supply line and the LPG return line. A fuel supply system of a ship, characterized in that installed. 삭제delete 청구항 1에 있어서,The method according to claim 1, 상기 부피 증가 수단은 기화기, 팽창 밸브 또는 감압 밸브인 것을 특징으로 하는 선박의 연료 공급 시스템.Said volume increasing means is a vaporizer, an expansion valve or a pressure reducing valve. 청구항 1에 있어서,The method according to claim 1, 상기 부피 증가 수단의 전단의 상기 LPG 복귀라인에는 압력 조절 밸브가 설치된 것을 특징으로 하는 선박의 연료 공급 시스템.And the pressure regulating valve is installed at the LPG return line in front of the volume increasing means. 청구항 1에 있어서,The method according to claim 1, 상기 LPG 연료 저장용 가압 탱크는 선박의 노출 갑판 상에 설치되거나 화물 창 또는 화물탱크 내에 설치된 것을 특징으로 하는 선박의 연료 공급 시스템.The LPG fuel storage pressurized tank is a fuel supply system of the ship, characterized in that installed on the exposed deck of the ship or installed in the cargo hold or cargo tank. 선박의 메인 엔진에 연료를 공급하는 방법으로서,As a method of supplying fuel to the ship's main engine, LPG 연료 저장용 가압 탱크에 LPG를 가압하여 연료로서 저장하고, 상기 LPG 연료 저장용 가압 탱크로부터 LPG를 빼내어서 고압으로 압축한 후 상기 메인 엔진으로 공급하고, 상기 LPG 연료 공급라인에서 고압으로 압축된 LPG 중 일부를 부피 증가시켜서 상기 LPG 연료 저장용 가압 탱크로 복귀시킴으로써 상기 LPG 연료 저장용 가압 탱크를 가압시키며, LPG is pressurized and stored in the LPG fuel storage pressurized tank as fuel, the LPG is removed from the LPG fuel storage pressurized tank and compressed to high pressure and then supplied to the main engine, and compressed to high pressure in the LPG fuel supply line. Pressurizing the LPG fuel storage pressurized tank by returning to the LPG fuel storage pressurized tank by increasing a portion of the LPG; 상기 메인 엔진은 고압 연료 분사 엔진인 것을 특징으로 하는 선박의 연료 공급 방법.And the main engine is a high pressure fuel injection engine. 삭제delete
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