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LNGreen: Next generation LNG carrier

GasLog Ltd.” is pleased to announce the completion of the LNGreen joint industry project. The LNGreen joint industry project brought together experts from GasLog,DNV GL, GTT and Hyundai Heavy Industries(“HHI”) to develop a state-of-the-art, next-generation, LNG carrier. Each of the project partners contributed their unique know-how and experience to develop the LNG carrier of tomorrow using the latest technology within the bounds of existing shipbuilding methods. The vessel concept has a significantly improved environmental footprint, a higher level of energy efficiency, an improved boil-off rate, and improved cargo capacity. Applying 2-stroke propulsion technology makes the vessels very well suited to future LNG trading patterns.

The LNGreen project focused on improving the efficiency and performance of the modern LNG carrier by analyzing actual operational performance data, focusing on further optimization through reassessment of vessel hydrodynamics, machinery and systems configuration. These improvements will lead to greater efficiency and cargo capacity without any compromise to the safety or quality of the vessels.

The outcome of the project was a concept design, which is close to 10% more energy efficient than vessels of the same type and size currently being built and with an increased cargo capacity of approximately 5% within the same physical dimensions.

GasLog contributed to the project the extensive experience it has built up over fifteen years of building and operating LNG carriers around the world. Specifically, GasLog conducted an analysis of historical fleet data and identified a number of operational parameters and restrictions that should be included in the design of the next generation LNG carrier, such as average sailing speeds, operation times and compatibility issues. The project also looked at forecast future trading patterns so that future vessel designs are developed to obtain maximum efficiency in a number of likely, realistic trading scenarios.

GTT and HHI used their extensive industry expertise and experience to focus on cargo containment optimization in parallel with hull shape improvement. The tank shape, necessary reinforcements and boil off rate calculations were examined to develop alternative cargo tank designs that could yield additional cargo capacity, whilst also taking into consideration recently introduced regulatory and compatibility restrictions.

Following a model-based approach through the usage of high tech  Cossmos software, various configurations in terms of propulsion options (both 2-stroke and 4-stroke) and mechanical energy saving devices (economizers, shaft generators) were assessed prior to concluding the proposed optimized design. Source: GasLog

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