The present invention relates to a boil-off gas reliquefaction system and a vessel having the same. The boil-off gas reliquefaction system comprises: a liquefied gas storage tank; a boil-off gas compressor compressing boil-off gas generated in the liquefied gas storage tank; and a liquefaction unit liquefying the boil-off gas by using a mixed refrigerant. The liquefaction unit comprises: a reliquefier liquefying the boil-off gas by having the boil-off gas exchange heat with the mixed refrigerant; a mixed refrigerant compressor which is a screw type using oil for sealing and lubrication, includes a slide valve adjusting the discharge pressure of the mixed refrigerant by moving forward and backward in a direction parallel to a rotation axis of the screw and a slide piston moving the slide valve by a hydraulic pressure, and compresses the mixed refrigerant; and a control unit controlling the slide piston based on a variable for the flow rate of the boil-off gas. According to the present invention, it is possible to improve the liquefaction efficiency in the boil-off gas reliquefaction process using a mixed refrigerant and to prevent oil mixed in the mixed refrigerant from being solidified by heat exchange with low-temperature boil-off gas.

    본 발명은 증발가스 재액화 시스템 및 선박에 관한 것으로서, 액화가스 저장탱크; 상기 액화가스 저장탱크에서 발생한 증발가스를 압축하는 증발가스 압축기; 및 혼합냉매를 이용하여 상기 증발가스를 액화시키는 액화부를 포함하고, 상기 액화부는, 상기 증발가스를 상기 혼합냉매와 열교환시켜 액화하는 재액화기; 실링 및 윤활을 위해 오일을 사용하는 스크류 타입이고, 스크류의 회전축과 평행한 방향으로 전후 이동하여 상기 혼합냉매의 토출 압력을 조절하는 슬라이드 밸브와 상기 슬라이드 밸브를 유압에 의해 이동시키는 슬라이드 피스톤을 포함하며, 상기 혼합냉매를 압축하는 혼합냉매 압축기; 및 상기 증발가스의 유량에 대한 변수를 토대로 상기 슬라이드 피스톤을 제어하는 제어부를 포함하는 것을 특징으로 한다.


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    Titel :

    liquefaction system of boil-off gas and ship having the same


    Weitere Titelangaben:

    증발가스 재액화 시스템 및 선박


    Beteiligte:
    LEE GEUN BO (Autor:in) / KWAK JEONG MIN (Autor:in) / LEE JIN KWANG (Autor:in) / LIM WON SUB (Autor:in)

    Erscheinungsdatum :

    2018-01-03


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Koreanisch


    Klassifikation :

    IPC:    B63B Schiffe oder sonstige Wasserfahrzeuge , SHIPS OR OTHER WATERBORNE VESSELS / F17C Behälter zum Aufnehmen oder Speichern verdichteter, verflüssigter oder verfestigter Gase , VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES / 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



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