U.S. Navy’s First John Lewis-Class Oiler Launched at NASSCO
The first ship in the U.S. Navy’s new class of fleet replenishment oilers has been launched at General Dynamics NASSCO in San Diego. The John Lewis-class oilers will provide underway...
Japanese shipyard Mitsubishi Heavy Industries, Ltd. (MHI) and their joint venture partner Imabari Shipbuilding received an order today from Mitsui & Co., Ltd for two next-generation liquefied natural gas (LNG) carriers which the company says will be slated to eventually carry LNG from the Cameron LNG export terminal in Louisiana. Mitsui and Mitsubishi, along with Sempra Energy, GDF Suez and NYK Line are partners on this multi-billion LNG export project.
MHI says the 177,000 m3 ships will be delivered from Nagasaki Shipyard & Machinery Works in 2018 and 2019, respectively, and will feature Moss-type LNG containment systems and a hybrid propulsion system.
About the main engine:
MHI says these LNG carriers will feature a hybrid propulsion system dubbed “STaGE” (Steam Turbine and Gas Engines), which as its name implies, combines a steam turbine and engines that can be fired by gas. STaGE’s components consist of the “Ultra Steam Turbine plant” (UST), a highly efficient reheating steam type marine turbine developed independently by MHI, a dual-fuel diesel engine capable of operating on both gas and oil, and an electric propulsion motor. Plant efficiency has been improved upwards of 20% as compared to conventional ships 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, according to MHI.
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