LNGreen carrier concept

Classification society DNV GL and industry majors GTT, Hyundai Heavy Industries (HHI), and shipowner GasLog have completed the development of next-generation LNG carrier concept.

Developed as part of the LNGreen joint industry project, the LNG carrier concept features latest technologies, significantly improved environmental footprint, a higher level of energy efficiency, as well as an improved boil-off rate and cargo capacity.

DNV GL’s integrated systems engineering approach COSSMOS, computational fluid dynamics calculations (CFD), and a containment system design, a specific operational profile and anticipated trades were used as a basis for these developments.

HHI and DNV GL carried out the hydrodynamic performance evaluation by comparing CFD simulations, while cargo containment optimisation was assessed by GTT and HHI.

"Using enabling computer tools we managed to develop a vessel, which is approximately 8% more energy efficient and has increased its cargo volume capacity by 5%."

The LNGreen concept assessed the improvement of energy efficiency and performance of LNG carriers under actual operational conditions and optimisation in terms of hydrodynamics, machinery and system configuration.

DNV GL project manager Martin Davies said: "Using enabling computer tools we managed to develop a vessel, which is approximately 8% more energy efficient and has increased its cargo volume capacity by 5%.

"The design is future compliant with new IGC code, Panama requirements as well as significant advances in a range of features, including the speed-range flexibility, hull form and boil-off rate."

DNV GL research and development Greece manager Nikolaos Kakalis, who is responsible for COSSMOS development, said: "Fusing unique competencies of key experts from across the industry, like HHI, GTT, and GasLog, with advanced tools like the COSSMOS machinery systems simulation and optimisation computer platform, as well as state-of-the-art hull optimisation software, we bring innovation in practise that can generate tangible added value.

"As LNGreen utilises existing technology it is important to stress that this concept design could be ordered today."


Image: The LNGreen concept uses existing technology to improve energy efficiency and performance. Photo: courtesy of DNV GL AS.