APPARATUS AND METHOD FOR MEASURING FLOW RATE OF FUEL GAS OF LNG CARRIER IN DIFFERENTIAL PRESSURE

摘要

An apparatus for measuring fuel gas flow rate of an LNG carrier in differential pressure is provided to reduce waste of boil-off gas by allowing increase of vapor pressure and LNG temperature inside the LNG cargo tank during LNG transportation. An apparatus for measuring fuel gas flow rate of an LNG carrier in differential pressure serially arranges more than 2 orifices having different measuring ranges in a pipe of a fuel supply line for supplying fuel gas from an LNG cargo tank of an LNG carrier to a propulsion unit of the fuel gas. A measuring portion of differential pressure is connected to the front/rear pipe of the fuel supply line of the orifices.