PROBLEM TO BE SOLVED: To stably supply boil-off gas to an engine even when pressurized boil-off gas is supplied to the engine under a use condition including a case in which use of a boil-off gas liquefier causes a composition ratio of boil-off gas to fluctuate.SOLUTION: A fuel gas supply system which supplies fuel gas to an engine, comprises: a tank which stores liquefied gas; a compression mechanism which pressurizes and sends out boil-off gas vaporized from the liquefied gas in order to supply them to an engine; a gas processing device which consumes a portion of the sent out boil-off gas; and a liquefier which liquefies a portion of the sent out boil-off gas and returns them to the tank. When a composition rate of the boil-off gas in the compression mechanism and the liquefier is fluctuated, the fuel gas supply system controls a flow of the boil-off gas in a manner that sends the boil-off gas with the composition rate thereof fluctuated to the gas processing device so as to replace them in the compression mechanism and the liquefier with the boil-off gas vaporized from the liquefied gas.SELECTED DRAWING: Figure 1

    【課題】ボイルオフガスの液化装置の使用によってボイルオフガスの組成比率が変化するような使用条件を含んでボイルオフガスを加圧してエンジンに供給する場合でも、ボイスオフガスを安定してエンジンに供給する。【解決手段】エンジンに燃料ガスを供給する燃料ガス供給システムは、液化ガスを貯留するタンク、エンジンに供給するために、液化ガスから気化したボイルオフガスを加圧し送出する加圧機構、送出されたボイルオフガスの一部を消費するガス処理装置、及び、送出されたボイルオフガスの一部を液化して前記タンクに戻す液化装置、を備える。前記加圧機構及び前記液化装置内のボイルオフガスの組成比率が変化した時、前記加圧機構及び前記液化装置内のボイルオフガスを、液化ガスから気化したボイルオフガスと置換するために、前記ガス処理装置に組成比率が変化したボイルオフガスを流すように制御する。【選択図】 図1


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    Title :

    FUEL GAS SUPPLY SYSTEM, VESSEL, AND FUEL GAS SUPPLY METHOD


    Additional title:

    燃料ガス供給システム、船舶、及び燃料ガス供給方法


    Contributors:

    Publication date :

    2018-04-26


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    F02M Zuführen von Brennstoff-Luft-Gemischen oder deren Bestandteilen bei Brennkraftmaschinen allgemein , SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF / B63B Schiffe oder sonstige Wasserfahrzeuge , SHIPS OR OTHER WATERBORNE VESSELS / B63H Schiffsantrieb oder Steuerung der Schiffe , MARINE PROPULSION OR STEERING / F02B INTERNAL-COMBUSTION PISTON ENGINES , Brennkraftmaschinen mit innerer Verbrennung mit Verdrängerwirkung / F17C Behälter zum Aufnehmen oder Speichern verdichteter, verflüssigter oder verfestigter Gase , VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES



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