The examples of using renewable energy are The Solar Panel which is an assembly of solar cells. The solar cells convert solar energy into electrical energy. The solar panels are very expensive even though they cost nothing to run. They are installed in places which must have sunlight. The efficiency is 10-20% the environmental impact is it needs very large areas, 40km² is needed to produce to produce the equivalent power of one modern power station. Does not cause pollution but there are environmental concerns about the production of storing devices.
The Wind Turbine is a device that converts the kinetic energy of the wind into kinetic energy of turbines. The turbines turn to generate electricity but they work only when there is wind. The efficiency is 30-40%. The environmental impacts are needs many large turbines to generate electricity which can be noisy and unsightly. Turbines may endanger birds and bats.
Hydroelectric Power Plant is when electricity is generated when water in an uphill reservoir flows downhill. The gravitational potential energy of the water changes to kinetic energy of the flowing water which drives the turbines to generate electricity. The efficiency is more than 90%. The environmental impact is Floods large area and affects the ecology of the area, May cause drought downstream if not managed properly, does not cause ai...
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...rbines in Port Elizabeth are used to create kinetic and the turbines are strong enough to power a small town. The Coelga Wind Farm was the first wind farm built in South Africa which was built in the Eastern Cape; due to the success of the wind farm many more were built. The problem with wind turbines is they can't be used in a place such as Gauteng, because the wind is minimal and the wind turbines can't be turned and no power can be produced.
South Africa wastes lots of money on non renewable energy sources in order to create electricity for example coal. The building of Wind Turbines, Hydroelectric power plants etc. Are costly, but once built are free as they use renewable energy sources. They do not contribute to global warming unlike nuclear power plant which is extremely bad for the air. There is also a risk of an accident such as the Chernobyl accident.
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