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A minnimum of 20 years! :P
Long enough to power electricity
Firstly, vacuum is being created in turbine exhaust and condenser rather than being required. It is created to reduce the back-pressures and to improve the turbine efficiency. Also, with vacuum the designers can design large size last stage blades of LP turbine for maximizing the turbine output.
Sihwa Lake Tidal Power in South Korea generates 250 MW of electricity, and has been in operation since last year. Korea has plans to begin construction of a 1 GW tidal power plant in 2017. Since a watt is equal to one joule per second, a gigawatt is 3.16x10^16 joules per year. Theoretically, much larger tidal generation facilities could be built, but there are practical economic and environmental considerations to factor in that.
leonardo devinchi (look up last name)
This is to cool the steam turbine condenser, where the steam outlet from the turbine's last stage is condensed before returning to the boiler feed pump inlets. The cooling towers circulate water that passes through tubes inside the condenser, separate from the steam/water in the boilers.
southern ocean
Climate changes including rising sea levels, altered rain patterns, drought, and ocean acidification threaten to degrade estuaries. Rising sea levels will move ocean and estuarine shorelines by inundating lowlands, displacing wetlands, and altering the tidal range in rivers and bays.
The purpose of exhaust hood spray is to decrease the temperature of steam turbine last stage that is probably LP. This is operate on low load specially at start up and shut down of steam turbine when the temperature at the outer most edge of the turbine blades of that stage is very high and As we know that the steam flow also decrease The temperature of turbine blade.
The last two steps are:The steam or gas spins the turbinesthe turbines then turns the electric generators producing elecricity
as long as it rains, and water is stored at a higher elevation than the turbine or impeller shaft of a machine. The power is stored as potential energy and is converted to kinetic energy by the power generating station. This station may convert this potential energy into electricity, in the case of a electrical generator, or the power can be used to directly power a shaft that will run machinery.
1. a drink, vital for organism to intake 2. An excellent medium for solution (solubility) 3. as power, water power as mass power in tidal waves, falls etc.