The Earth is composed of a number of layers which are known from the centre outwards as the inner core, outer core, mantle and crust. Temperatures can reach more than 4500oC in the Earth’s core and 1000oC to 4000oC in the outer layers. The heat from these naturally high temperatures is transferred or conducted towards water or rocks near the Earth’s surface which are used to generate geothermal energy.
Geothermal energy is considered the ‘Holy Grail’ of clean power generation. It is the only renewable energy that can provide long-term baseload power 24 hours a day, 7 days a week. As such, it has the capability to replace fossil fuel generation.
Geothermal power is a commercially proven energy source, with first electricity generation dating back to last century in Italy in 1904. There is more than 11,000 megawatts of geothermal energy already operating around the world, which is equivalent to about 15 to 20 coal-fired power stations.
Geothermal is an emission free and environmentally sustainable natural resource which is ready to play a significant role in meeting the world’s urgent needs for clean energy. |