PROBLEM TO BE SOLVED: To provide a boil-off gas re-liquefying facility which can improve heat exchange efficiency of a heat exchanger while improving re-liquefying efficiency through reductions in a volume of flush flow and compression power of a refrigeration cycle circuit without complicating a structure.SOLUTION: A boil-off gas re-liquefying facility comprises: a first heat exchanger EX9 which cools boil-off gas BOG flowing in an extraction passage L2 in a manner that exchanges heat with the boil-off gas flowing from a storage tank 10 to a boil-off gas compression section 20; a second heat exchanger EX10 which cools the boil-off gas BOG flowing through the first heat exchanger EX9 on the extraction passage L2 with a coolant N2 circulated in a refrigeration cycle circuit C; and pressure setting means 60a which sets extraction pressure of the boil-off gas BOG to be sent to the extraction passage L2 at less than engine supply pressure and not less than liquefying pressure which allows the boil-off gas BOG flowing in the extraction passage L2 to be liquefied in the first heat exchanger EX9.SELECTED DRAWING: Figure 1
【課題】構成の複雑化を避けながらも、フラッシュ流の流量を低減して効率向上を図りつつ、熱交換器での熱交換効率を向上、更には、冷凍サイクル回路の圧縮動力低減による効率向上を実現し得るボイルオフガスの再液化設備を提供する。【解決手段】抽気流路L2を通流するボイルオフガスBOGを貯留タンク10からボイルオフガス圧縮部20までを通流するボイルオフガスBOGと熱交換する形態で冷却する第1熱交換器EX9と、抽気流路L2で第1熱交換器EX9を通過したボイルオフガスBOGを冷凍サイクル回路Cを通流する冷媒N2にて冷却する第2熱交換器EX10と、抽気流路L2へ抽気するボイルオフガスBOGの抽気圧力を、エンジン供給圧力未満で、且つ抽気流路L2を通流するボイルオフガスBOGを第1熱交換器EX9にて液化可能な液化圧力以上に設定する圧力設定手段60aとを備える。【選択図】図1
BOIL-OFF GAS RE-LIQUEFYING FACILITY
ボイルオフガスの再液化設備
2016-04-25
Patent
Electronic Resource
Japanese
IPC: | F25J LIQUEFACTION, SOLIDIFICATION, OR SEPARATION OF GASES OR GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT , Verflüssigen, Verfestigen oder Trennen von Gasen oder Gasgemischen durch Druck- und Kältebehandlung / B63B Schiffe oder sonstige Wasserfahrzeuge , SHIPS OR OTHER WATERBORNE VESSELS / B63H Schiffsantrieb oder Steuerung der Schiffe , MARINE PROPULSION OR STEERING / C10L FUELS NOT OTHERWISE PROVIDED FOR , Anderweitig nicht vorgesehene Brennstoffe / F17C Behälter zum Aufnehmen oder Speichern verdichteter, verflüssigter oder verfestigter Gase , VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES |