To stably supply boil-off gas to an engine even when supplying the boil-off gas by compression to an engine including use conditions such as having composition ratio of the boil-off gas varied by use of a liquefier for the boil-off gas.SOLUTION: A fuel gas supply system for supplying fuel gas to an engine comprises: a tank for retaining liquefied gas; a pressurizing mechanism for compressing and feeding out the boil-off gas vaporized from the liquefied gas for supplying the same to the engine; and a liquefier for liquefying one portion of the fed out boil-off gas and recovering the same to the tank. The liquefier includes: a liquid recovery control valve for controlling the amount of the liquefied gas flowing through a liquid recovery piping for recovering the liquefied gas liquefied by the liquifier to the tank; and a gas-liquid recovery control valve for controlling the amount of the gas-liquid mixed fluid flowing through a gas-liquid recovery piping for returning the gas-liquid mixed fluid generated by liquefying of the boil-off gas into a liquid phase of the liquefied gas in the tank.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、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回収する液化装置、を備える。前記液化装置は、前記液化装置で液化した液化ガスを前記タンクに回収する液回収配管を流れる液化ガスの量を制御する液回収制御バルブと、ボイルオフガスの液化により生成された気液混合流体を、前記タンク内の液化ガスの液相中に戻す気液回収配管を流れる気液混合流体の量を制御する気液回収制御バルブと、を備える。【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 :

    2019-04-11


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B63B Schiffe oder sonstige Wasserfahrzeuge , SHIPS OR OTHER WATERBORNE VESSELS / B63H Schiffsantrieb oder Steuerung der Schiffe , MARINE PROPULSION OR STEERING / 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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