Wilhelmsen Technical Solutions (WTS) and offshore oil and gas engineering specialist NLI Solutions (NLI), both Norwegian companies, have received Approval in Principal (AiP) from the Norwegian class society Det Norske Veritas (DNV) on their jointly-developed LNG fuel tank design.
The two companies have worked on the development of a LNG fuel tank design since 2009 in response to growing interest from shipowners to the use of LNG as a marine fuel. The tank is designed to IMO-B standards and is a prismatic, atmospheric and self-supporting LNG steel tank with state of the art cryogenic insulation. Parts of the tank system are patent pending.
The first stage of the LNG Fuel Tank development project was co-financed by the Norwegian Research Council’s MAROFF program, and Wilhelmsen Marine Consultants, Liquiline, DNV and Marintek participated as partners in the development.
The NLI LNG tank is designed for applications including ship board LNG bunker tanks, tanks for LNG bunker vessels, small LNG carriers and small to medium sized tanks on land. This first AiP from DNV is valid for the system to be used as marine LNG fuel tanks.
The NLI TS-X tank system is based on the following principles:
- Prismatic tanks in stainless steel
- Atmospheric pressure, 0,7 bar or more, pending different regulations
- High-tech isolation with low loss (practically no vaporization)
- Patented fixing device
- Integrated drain system/leak handling
The two partners are now planning to further develop the tank concept and in the future promote the tank design to the marine industry and the small scale LNG distribution sector.
The shift towards the use of LNG for marine propulsion is said to be as significant as the shift from coal to oil but with the additional environmental benefit of lower CO2 emissions. There will also be a significant financial benefit for ship owners as gas prices are expected to remain competitive over time compared with to diesel and distillate products.
(Source: Wilhelmsen Technical Solutions (WTS) and NLI Solutions )