GAS FUEL SUPPLY DEVICE FOR CONTROLLING METHANE NUMBER IN LNGC

摘要

A gas fuel supply device for controlling a methane number in an LNG carrier is provided to prevent a knocking phenomenon due to decrease of the methane number when a gas fuel is used in a dual fuel engine. A gas fuel supply device for controlling a methane number in an LNG carrier includes a gas analyzer(100), an integrated automation system(110), and a forced evaporation controller(120). The gas analyzer is mounted on a pipe at a position before a gas fuel passed through a heater(40) is supplied into a dual fuel engine(50). The gas analyzer transmits data about the methane number of the evaporated gas measured and analyzed at predetermined periods to the integrated automation system. The integrated automation system compares the input methane number with a minimum required methane number. The forced evaporation controller controls opening angles of a first valve(22) and a second valve(24).