PROBLEM TO BE SOLVED: To optimize treatment of boil-off gas and energy consumption in accordance with a navigation state of a liquefied gas carrying vessel by using a high pressure gas compressor and a high pressure liquid pump together and reduce a load on the environment, in the liquefied gas carrying vessel.SOLUTION: A first fuel gas supply line 14 for supplying boil-off gas (BOG) in a cargo tank 11 to a main engine 12 via a high-pressure gas compressor 13 as fuel gas is provided. A second fuel gas supply line 26 for sucking liquefied gas in the tank 11 by a pump 27 and generating high-pressure gas by using a high-pressure liquid pump 29 and a gas heater 30 is provided. In navigation upon liquefied gas loading, when fuel gas is sufficient by BOG alone, only the first fuel gas supply line 14 is used, and when fuel gas is insufficient, the second fuel gas supply line 26 is used together. In navigation upon liquefied gas empty loading, only the first fuel gas supply line is used, and when a spray operation is not performed, only the second fuel gas supply line is used.SELECTED DRAWING: Figure 1

    【課題】液化ガス運搬船において、高圧ガスコンプレッサおよび高圧液ポンプを併用して、液化ガス運搬船の運航状態に合わせ、ボイルオフガスの処理、エネルギー消費を最適化するとともに環境への負荷をより低減する。【解決手段】カーゴタンク11内のボイルオフガス(BOG)を、高圧ガスコンプレッサ13を介して主機関12へ燃料ガスとして供給する第1燃料ガス供給ライン14を設ける。タンク11内の液化ガスをポンプ27で吸い上げ、高圧液ポンプ29、ガスヒータ30を用いて高圧ガスを生成する第2燃料ガス供給ライン26を設ける。液化ガス積載時の運航において、BOGのみで燃料ガスが十分なときには第1燃料ガス供給ライン14のみを使用し、足りないときには、第2燃料ガス供給ライン26を併用する。液化ガス空荷時の運航において、スプレー作業を行うときには第1燃料ガス供給ラインのみを使用し、スプレー作業を行わないときには、第2燃料ガス供給ラインのみを使用する。【選択図】図1


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    Title :

    FUEL GAS SUPPLY SYSTEM FOR LIQUEFIED GAS CARRYING VESSEL


    Additional title:

    液化ガス運搬船用燃料ガス供給システム


    Contributors:

    Publication date :

    2016-08-04


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B63H Schiffsantrieb oder Steuerung der Schiffe , MARINE PROPULSION OR STEERING / B63B Schiffe oder sonstige Wasserfahrzeuge , SHIPS OR OTHER WATERBORNE VESSELS / F02B INTERNAL-COMBUSTION PISTON ENGINES , Brennkraftmaschinen mit innerer Verbrennung mit Verdrängerwirkung / F02M Zuführen von Brennstoff-Luft-Gemischen oder deren Bestandteilen bei Brennkraftmaschinen allgemein , SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF



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