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Air-independent propulsion (AIP), or air-independent power, is any marine propulsion technology that allows a non-nuclear submarine to operate without access to atmospheric oxygen (by surfacing or using a snorkel). AIP can augment or replace the diesel-electric propulsion system of non-nuclear vessels.
Marine currents can carry large amounts of water, largely driven by the tides, which are a consequence of the gravitational effects of the planetary motion of the Earth, the Moon and the Sun. Augmented flow velocities can be found where the underwater topography in straits between islands and the mainland or in shallows around headlands plays a major role in enhancing the flow velocities ...
Electric motors using battery packs have been used for propulsion on submarines and electric boats and have been proposed for energy-efficient propulsion. [1] A marine steam turbine manufactured by MAN Energy Solutions. Development in liquefied natural gas (LNG) fueled engines are gaining recognition for their low emissions and cost advantages.
These are also called tidal stream turbines (TST), tidal energy converters (TEC), or marine hydro-kinetic (MHK) generation. These turbines operate on a similar principle to wind turbines , but are designed to work in a fluid approximately 800 times more dense than air which is moving at a slower velocity.
Subsea technology involves fully submerged ocean equipment, operations, or applications, especially when some distance offshore, in deep ocean waters, or on the seabed. The term subsea is frequently used in connection with oceanography, marine or ocean engineering, ocean exploration, remotely operated vehicle (ROVs) autonomous underwater vehicles (AUVs), submarine communications or power ...
Marine Current Turbines Ltd (MCT), was a United Kingdom-based company that developed tidal stream generators, most notably the 1.2 MW SeaGen turbine. The company was bought by the German automation company, Siemens in 2012, who later sold the company to Atlantis Resources in 2015.
The company installed an underwater turbine [8] to use tidal currents to generate renewable energy. The unit was installed on the ocean floor at the company's Federal Energy Regulatory Commission-licensed [9] Cobscook Bay project site, in Eastport and Lubec, Maine. The project transmitted the first electricity ever delivered to a utility-scale ...
A turbo-electric COGAS power-plant. In this way, some of the otherwise lost energy can be reclaimed and the specific fuel consumption of the plant can be decreased. Large (land-based) electric powerplants built using this combined cycle can reach conversion efficiencies of over 60%.