The present invention relates to an evaporation gas reliquefaction system and a ship including the same. The evaporation gas reliquefaction system comprises a liquefaction unit for liquefying evaporation gas using a mixed refrigerant. The liquefaction unit includes: a reliquefaction unit which performs the heat exchange between the evaporation gas and the mixed refrigerant to perform liquefaction; a lubricating oil-free type mixed refrigerant compressor which compresses the mixed refrigerant and prevents the mixing of lubricating oil when the mixed refrigerant is compressed; a mixed refrigerant cooler for cooling the compressed mixed refrigerant; a gas-liquid separator which separates the cooled mixed refrigerant into gas and a liquid to independently supply a gas type mixed refrigerant and a liquid type mixed refrigerant to the reliquefaction unit; and a mixed refrigerant decompression valve for decompressing the gas type mixed refrigerant separated from the gas-liquid separator downstream of the reliquefaction unit and re-injecting the same into the reliquefaction unit. The reliquefaction unit is provided with a first mixed refrigerant flow through which the gas type mixed refrigerant separated by the gas-liquid separator flows, a second mixed refrigerant flow reinjected via the mixed refrigerant decompression valve, and an evaporation gas flow. The gas-liquid separator is to join the liquid type mixed refrigerant onto the second mixed refrigerant flow of the reliquefaction unit.

    본 발명은 증발가스 재액화 시스템 및 이를 포함하는 선박에 관한 것으로서, 증발가스 재액화 시스템은 혼합냉매를 이용하여 증발가스를 액화시키는 액화부를 포함하고, 상기 액화부는, 증발가스를 혼합냉매와 열교환시켜 액화하는 재액화기; 혼합냉매를 압축하며 혼합냉매 압축 시 윤활유가 혼입되지 않는 윤활유-프리 타입의 혼합냉매 압축기; 압축된 혼합냉매를 냉각하는 혼합냉매 쿨러; 냉각된 혼합냉매를 기액분리하여 기상의 혼합냉매와 액상의 혼합냉매를 독립적으로 상기 재액화기로 공급하는 기액분리기; 및 상기 기액분리기에서 분리된 기상의 혼합냉매를 상기 재액화기의 하류에서 감압해 상기 재액화기로 재유입시키는 혼합냉매 감압밸브를 포함하고, 상기 재액화기는, 상기 기액분리기에서 분리된 기상의 혼합냉매가 흐르는 제1 혼합냉매 흐름, 상기 혼합냉매 감압밸브를 거쳐 재유입되는 제2 혼합냉매 흐름, 증발가스 흐름이 마련되고, 상기 기액분리기는, 액상의 혼합냉매를 상기 재액화기의 제2 혼합냉매 흐름 상에 합류시키는 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 이를 포함하는 선박


    Contributors:
    LEE JAE JUN (author) / LEE JIN KWANG (author) / HONG WON JONG (author) / PARK JONG WAN (author)

    Publication date :

    2020-06-12


    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



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