FUEL GAS SUPPLY SYSTEM

摘要

The present invention is to provide a fuel gas supply system to improve operation and liquefaction efficiency. The fuel gas supply system according to an embodiment of the present invention comprises: a storage tank which stores liquefied gas and evaporated gas of the liquefied gas; a compression unit which compresses the evaporated gas supplied from the storage tank; a first fuel supply line which supplies the evaporated gas supplied from the storage tank, to a first engine through the compression unit; a first heat exchange unit which liquefies the compressed evaporated gas; a first gas-liquid separator which separates the evaporated gas liquefied by the first heat exchanger into gas and liquid components; a second gas-liquid separator which separates the liquid component separated by the first gas-liquid separator, into gas and liquid components; a second fuel gas supply line which supplies the gas component separated by the first gas-liquid separator, to a second engine through the first heat exchanger; a first re-liquefaction line which is branched from the rear end of the compression unit of the first fuel supply line, and supplies the compressed evaporated gas to the first gas-liquid separator through the first heat exchange unit; and a second control valve which is provided at the rear end of the first heat exchange unit of the first re-liquefaction line and decompresses the liquefied evaporated gas.