MHI develops ‘next generation’ LNG carrier
Mitsubishi Heavy Industries Ltd (MHI) has completed development of the ‘Sayaringo STaGE’, its new next-generation LNG carrier.
The new 297.5m vessel was developed as a successor to the Sayaendo, the company's highly acclaimed LNG carrier evolved from carriers with Moss-type 2 spherical tanks.
It offers a near 16% increase in LNG carrying capacity (180,000m3 in total) without changing the ship's width, while incorporation of a hybrid propulsion system has boosted fuel efficiency by more than 20% compared to the Sayaendo.
Key developments over the Sayaendo also include the use of apple-like shape tanks with the upper half bulging more than the lower half, over the continuous cover over spherical pea-shaped tanks on the Sayaendo.
The new structural configuration succeeds in efficiently increasing LNG carrying capacity and is part of MHI's initiative to develop a vessel in the New Panamax category.
Sayaringo STaGE also benefits from a STaGE hybrid propulsion system combining a steam turbine and engines that can be fired by gas. It is made up of the MHI developed Ultra Steam Turbine plant (UST), a dual-fuel diesel engine capable of operating on both gas and oil and an electric propulsion motor.
Plant efficiency has been significantly improved through the UST's effective use of the engine's waste heat, resulting in a propulsion system enabling high-efficiency navigation throughout a full range of speeds.
Leveraging the Sayaringo STaGE's capacity for transporting North American shale gas safely and efficiently, MHI plans to undertake extensive business activities promoting the new vessel as a strategic product among its LNG carrier offerings.
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