A system and method for treating boil-off gas in a ship are disclosed. According to the present invention, the system for treating boil-off gas in a ship comprise: a compression unit provided on the ship and compressing boil-off gas generated from a storage tank in which liquefied gas is stored; a re-liquefaction line connected to the storage tank from the compression unit, re-liquefying compressed gas and transporting it to the storage tank; a heat exchanger provided in the re-liquefaction line to receive the compressed gas and cool it by exchanging heat with uncompressed boil-off gas to be supplied to the compression unit; a refrigerant replenishment line branching the boil-off gas compressed through a part of the compression unit and supplying it to an uncompressed boil-off gas flow to be supplied to the heat exchanger; and an expander provided in the refrigerant replenishment line and expanding and cooling by reducing the boil-off gas. It is characterized in that the boil-off gas is compressed by transferring the expansion energy of the boil-off gas from the expander to the compression unit. In the present invention, by utilizing the expansion energy when depressurizing the boil-off gas supplemented with the refrigerant to compress the uncompressed boil-off gas in the compression unit, the power required for compressing the boil-off gas can be reduced and the energy efficiency of the ship can be increased.

    선박의 증발가스 처리 시스템 및 방법이 개시된다. 본 발명의 선박의 증발가스 처리 시스템은, 선박에 마련되며 액화가스가 저장된 저장탱크로부터 발생하는 증발가스를 압축하는 압축부; 상기 압축부로부터 상기 저장탱크로 연결되며, 압축가스를 재액화하여 상기 저장탱크로 이송하는 재액화라인; 상기 재액화라인에 마련되며 상기 압축가스를 공급받아 상기 압축부로 공급될 미압축 증발가스와 열교환으로 냉각하는 열교환기; 상기 압축부의 일부를 거쳐 압축된 증발가스를 분기하여 상기 열교환기로 공급될 미압축 증발가스 흐름으로 공급하는 냉매보충라인; 및 상기 냉매보충라인에 마련되며 상기 증발가스를 감압하여 팽창냉각하는 팽창기:를 포함하며, 상기 팽창기에서의 증발가스 팽창에너지를 상기 압축부로 전달하여 상기 증발가스를 압축하는 것을 특징으로 한다.


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    Title :

    Boil-Off Gas Treatment System and Method for Ship


    Additional title:

    선박의 증발가스 처리 시스템 및 방법


    Contributors:

    Publication date :

    2022-07-18


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Korean


    Classification :

    IPC:    B63B Schiffe oder sonstige Wasserfahrzeuge , SHIPS OR OTHER WATERBORNE VESSELS / B63H Schiffsantrieb oder Steuerung der Schiffe , MARINE PROPULSION OR STEERING / 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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