Photovoltaic cells (PV cells) Photovoltaic cells are operated by solar thermal energy, one of the renewable energy sources. Australia has a great potential to generate electricity from solar thermal cells, as the level of solar radiation in Australia is relatively high compared to other countries. As this can save lots of energy and reduce many environmental problems, Photovoltaic cells are already in use in Australia. Recently, a project of building a solar thermal tower has been approved by the Queensland government (Donovan. C, 2008). The physics principle of a PV cell is identical to nuclear power station. Water is heated at a very high temperature of between 280 and 1000 to produce high- pressure stream, which then gives the conventional turbine power to produce electricity. However, unlike the nuclear power station, photovoltaic cells do not burn fuel. Instead they collect the energy of the sun by using mirrors to concentrate the sun light onto heat exchangers (U. S Department of Energy, 2008). Wind Power A wind turbine is just like a fan that produces wind, which can......

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