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Marine energy, also known as ocean energy, ocean power, or marine and hydrokinetic energy, refers to energy harnessed from waves, tides, salinity gradients, and temperature differences in the ocean. The movement of water in the world's oceans stores vast amounts of kinetic energy , which can be converted into electricity to power homes ...
The image to the right illustrates the high density of flow along the coast, note the high velocity white northward flow, perfect for extraction of ocean current energy. Countries that are interested in and pursuing the application of ocean current energy technologies include the European Union, [4] Japan, [5] the United States, [6] and China. [7]
The potential energy density is equal to the kinetic energy, [1] both contributing half to the wave energy density E, as can be expected from the equipartition theorem. The waves propagate on the surface, where crests travel with the phase velocity while the energy is transported horizontally with the group velocity .
An ocean thermal energy conversion power plant built by Makai Ocean Engineering went operational in Hawaii in August 2015. The governor of Hawaii, David Ige, "flipped the switch" to activate the plant. This is the first true closed-cycle ocean Thermal Energy Conversion (OTEC) plant to be connected to a U.S. electrical grid.
Wave Power in kilowatts/square metre in the waters around Australia Protean Energy Wave Energy Converter prototype trial, 2008. Wave power in Australia is being developed as the country has a long and largely deep-water coastline. It is one of several regions of the world where wave power projects are being considered.
On the other hand, tidal energy has high reliability, excellent energy density, and high durability. [ 9 ] Because the Earth's tides are ultimately due to gravitational interaction with the Moon and Sun and the Earth's rotation, tidal power is practically inexhaustible, and is thus classified as a renewable energy resource.
For those who are not experts in crude oil prices and other facets of the oil and gas industry, adding exchange-traded funds is one way to gain exposure to this sector. Energy ETFs often offer a ...
Osmotic power, salinity gradient power or blue energy is the energy available from the difference in the salt concentration between seawater and river water. Two practical methods for this are reverse electrodialysis (RED) and pressure retarded osmosis (PRO). Both processes rely on osmosis with membranes. The key waste product is brackish water ...