South Korea’s Hyundai Heavy Industries (HHI) has developed a new gas management system capable of re-liquefying boil off gas (BOG) from a membrane LNG containment tank.
This new gas treatment system comprises an ME-GI engine, a BOG high-pressure compressor, a BOG re-liquefaction system, an LNG fuel gas supply system (FGSS) and Hyundai integrated gas supply system (Hi-GAS).
With these components, the system will be able to re-liquefy 100% of the BOG and re-store it in the LNG tank. Processed boil off gas can be then used as fuel for the LNG carriers.
The conventional system was only capable of partially re-liquefying BOG, HHI stated.
The new system will help the vessel save up to 50% of the fuel cost than the standard vessel using heavy fuel oil (HFO) or marine gas oil (MGO). In addition, it will offer 92%, 80% and 23% less emissions of sulphur, nitrogen and carbon, respectively.
This new gas management system will be installed on two 176,000m³ LNG carriers that are being built by HHI for Knutsen, Norway. The vessels are expected to be delivered in 2016.
In another development, HHI has secured an order worth $1.1bn from Malaysian oil and gas company Petronas to construct five new vessels, Nikkei Asian Review reported.
The new LNG carriers will be delivered to Petronas’ listed subsidiary MISC, and are expected to arrive between September 2016 and late 2017.
Image: The new HHI gas management system. Photo: courtesy of Hyundai Heavy Industries.