RELIQUEFACTION SYSTEM OF AN LNG AND LPG SHIP, CAPABLE OF EFFICIENTLY COOLING AN LPG FUEL BY USING AN LNG FUEL, AND A SUPPLYING METHOD THEREOF

摘要

PURPOSE: A reliquefaction system of an LNG and LPG ship and a supplying method thereof are provided to perform a stable reliquefaction work by using a residual LNG which remains in an LNG storage tank.;CONSTITUTION: A reliquefaction system of an LNG and LPG ship includes an LNG evaporative gas cycle line (110), an LNG gas-liquid separation unit (120), an LNG evaporative gas compressor (130), an engine fuel supply line (140), an LNG evaporative gas reliquefaction unit (160), an LPG evaporative gas cycle line (210), an LPG evaporative gas compressor (220), an LPG evaporative gas reliquefaction unit (230), and an LNG liquid fuel supply unit. The engine fuel supply line is branched off from the LNG evaporative gas cycle line, and supplies a part of evaporative gas, which is discharged from the LNG evaporative gas compressor, to an engine. The LPG evaporative gas compressor is installed on the LPG evaporative gas cycle line. The LNG liquid fuel supply unit takes out a liquid fuel from the inside of the LNG storage tank; passes the liquid fuel successively through the LPG evaporative gas reliquefaction unit and the LNG gas-liquid separation unit; and returns the liquid fuel to the LNG storage tank (100).;COPYRIGHT KIPO 2013