The present invention relates to a system to reliquefy boil-off gas (BOG), capable of raising liquefaction efficiency, and a vessel thereof. According to the present invention, the system comprises: a liquefied gas storage tank; a BOG compressor to compress BOG generated in the liquefied gas storage tank; and a liquefication unit using mixed coolant to liquefy the BOG. The liquefication unit includes: first and second reliquefiers exchanging heat between the compressed BOG and the mixed coolant to liquefy the compressed BOG and installed in series; a mixed coolant compressor, which is a screw type using oil for sealing and lubrication, to compress the mixed coolant; and a mixed coolant separator installed between the first and second reliquefiers, and dividing the mixed coolant into gaseous and liquid phases to return the liquid phase to the mixed coolant compressor.

    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 포함하며, 상기 액화부는, 압축된 상기 증발가스를 상기 혼합냉매와 열교환시켜 액화하며 직렬로 마련되는 제1 재액화기 및 제2 재액화기; 실링 및 윤활을 위해 오일을 사용하는 스크류 타입이며, 상기 혼합냉매를 압축하는 혼합냉매 압축기; 및 상기 제1 재액화기와 상기 제2 재액화기 사이에 마련되며 상기 혼합냉매를 기상과 액상으로 분리하여 상기 액상을 상기 혼합냉매 압축기로 되돌리는 혼합냉매 분리기를 포함하는 것을 특징으로 한다.


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    Title :

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


    Additional title:

    증발가스 재액화 시스템 및 선박


    Contributors:
    LIM WON SUB (author) / KWAK JEONG MIN (author) / LEE GEUN BO (author) / LEE JIN KWANG (author)

    Publication date :

    2018-01-03


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Korean


    Classification :

    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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