The open rack type LNG vaporizer (ORV) uses seawater as its heat source and is a typical higher flow LNG vaporizer. The seawater enters the top of the vaporizer and is runs over the aluminium tubes. The LNG flows up and is converts from a liquid into a gas. The benefit of using heat from the seawater is that this energy is for free and there is no further CO2 emission for regasifying the LNG. The water is gathered in the basin at the bottom of the vaporizer tubes before being returned to the sea.
This is a simply and cost-efficient vaporizing process that is easy to operate and maintain. It is a very safe and most reliable technology.