Fuel gas supply system to main engine LNG tanker dual fuel system
A pressure build up system brings the entire tank up to the pressure required by the engines. The pressure then forces the LNG through the vaporizer to the engine(s).
This is the simplest and cheapest system. The disadvantage is that when no fuel is used, the tank pressure will slowly creep up until it must be blown off. As this is usually unacceptable, the engine will need to be started.
