PROBLEM TO BE SOLVED: To provide a liquefied gas carrying vessel reducing the amount of a gas passing through a compressor and suppressing the pressure of a gas in a tank to a specified value or less.SOLUTION: A liquefied gas carrying vessel comprises: a tank; a compressor; a gas engine; a vaporized gas line guiding a naturally vaporized gas to the compressor; a compressed gas supply line guiding a compressed gas to the engine; a return line which is the return line for returning the compressed gas to the tank and discharges the gas into the liquid phase portion of the liquefied gas in the tank when carrying the liquefied gas; a return valve provided to the return line; and a controller controlling the gas amount sucked in the compressor and the opening rate of the return valve. The controller controls a gas suction amount so that the pressure of the compressed gas becomes a set pressure thereof when a tank gas pressure is lower than a prescribed value, and increases the gas suction amount when the tank gas pressure becomes higher than the prescribed value, and further increases the opening rate of the return valve so that the compressed gas pressure becomes the set pressure thereof.SELECTED DRAWING: Figure 3

    【課題】圧縮機を通過するガス量を抑えるとともに、タンク内のガス圧を規定値以下に抑える液化ガス運搬船を提供する。【解決手段】液化ガス運搬船は、タンクと、圧縮機と、ガスエンジンと、自然気化ガスを圧縮機に導く気化ガスラインと、圧縮ガスをエンジンに導く圧縮ガス供給ラインと、圧縮ガスをタンクに返送する返送ラインであって、液化ガスの運搬時に、タンクの液化ガスの液相部分にガスを放出する返送ラインと、返送ラインに設けられた返送バルブと、圧縮機に吸入されるガス吸入量、及び、返送バルブの開度を制御する制御装置とを備え、制御装置は、タンクガス圧が所定値より低いときは、圧縮ガス圧が圧縮ガス設定圧になるようにガス吸入量を制御し、タンクガス圧が所定値より高くなったときは、ガス吸入量を増大させるとともに、圧縮ガス圧が圧縮ガス設定圧になるように返送バルブの開度を増大させる。【選択図】図3


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    Title :

    LIQUEFIED GAS CARRYING VESSEL


    Additional title:

    液化ガス運搬船


    Contributors:

    Publication date :

    2016-07-11


    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 / B63J Hilfsanlagen auf Schiffen , AUXILIARIES ON VESSELS / 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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