The power of geothermal energy

It successfully lit four light bulbs. Experimental generators were built in BeppuJapan and the GeysersCalifornia, in the s, but Italy was the world's only industrial producer of geothermal electricity until Trends in the top five geothermal electricity-generating countries, — US EIA Global geothermal electric capacity. Upper red line is installed capacity; [8] lower green line is realized production.

The power of geothermal energy

See a German translation of this page Introduction The centre of the Earth is around degrees Celsius - easily hot enough to melt rock. Even a few kilometres down, the temperature can be over degrees Celsius if the Earth's crust is thin.

In general, the temperature rises one degree Celsius for every 30 - 50 metres you go down, but this does vary depending on location In volcanic areas, molten rock can be very close to the surface.

Sometimes we can use that heat.

The power of geothermal energy

Geothermal energy has been used for thousands of years in some countries for cooking and heating. The name "geothermal" comes from two Greek words: How it works Hot rocks underground heat water to produce steam.

We drill holes down to the hot region, steam comes up, is purified and used to drive turbines, which drive electric generators. There may be natural "groundwater" in the hot rocks anyway, or we may need to drill more holes and pump water down to them.

The first geothermal power station was built at Landrello, in Italy, and the second was at Wairekei in New Zealand.

In Iceland, geothermal heat is used to heat houses as well as for generating electricity. If the rocks aren't hot enough to produce steam we can sometimes still use the energy - the Civic Centre in Southampton, England, is partly heated this way as part of a district heating scheme with thousands of customers.

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Geothermal energy - it's hot! More Geothermal energy is an important resource in volcanically active places such as Iceland and New Zealand. How useful it is depends on how hot the water gets. This depends on how hot the rocks were to start with, and how much water we pump down to them.

Water is pumped down an "injection well", filters through the cracks in the rocks in the hot region, and comes back up the "recovery well" under pressure. It "flashes" into steam when it reaches the surface. The steam may be used to drive a turbogenerator, or passed through a heat exchanger to heat water to warm houses.

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A town in Iceland is heated this way. The steam must be purified before it is used to drive a turbine, or the turbine blades will get "furred up" like your kettle and be ruined. How geothermal energy works See Also: BBC News Article about drilling for geothermal energy in Cornwall, UK Advantages Geothermal energy does not produce any pollution, and does not contribute to the greenhouse effect.

The power stations do not take up much room, so there is not much impact on the environment. No fuel is needed. Once you've built a geothermal power station, the energy is almost free. It may need a little energy to run a pump, but this can be taken from the energy being generated.

The power of geothermal energy

Disadvantages The big problem is that there are not many places where you can build a geothermal power station. You need hot rocks of a suitable type, at a depth where we can drill down to them. The type of rock above is also important, it must be of a type that we can easily drill through.

Sometimes a geothermal site may "run out of steam", perhaps for decades. Hazardous gases and minerals may come up from underground, and can be difficult to safely dispose of. Geothermal energy is renewable. The energy keeps on coming, as long as we don't pump too much cold water down and cool the rocks too much.Geothermal energy is the heat from the Earth.

It's clean and sustainable. Resources of geothermal energy range from the shallow ground to hot water and hot rock found a few miles beneath the Earth's surface, and down even deeper to the extremely high temperatures of molten rock called magma. From nuclear power plants to turbines, Toshiba delivers advanced power and energy solutions.

Geothermal energy is thermal energy generated and stored in the Earth. Thermal energy is the energy that determines the temperature of matter. The geothermal energy of the Earth's crust originates from the original formation of the planet and from radioactive decay of materials (in currently uncertain but possibly roughly equal proportions).

The geothermal gradient, which is the difference in. Dry steam power plants systems were the first type of geothermal power generation plants built (they were first used at Lardarello in Italy in ).

Geothermal Energy Pros and Cons - Energy Informative

Operating and Developing Power Plants. The information presented in these maps was aggregated from the Geothermal Energy Association Annual U.S. and Global Geothermal Power Production Report and the Geothermal Energy Association Annual U.S. and Global Geothermal Power Production Report..

Geothermal project status and location were verified and corrected by NREL. Geothermal power plants consume less water on average over the lifetime energy output than the most conventional generation technologies.** Geothermal energy videos and animations: Energy Geothermal Energy.

Geothermal Energy - Alternative Energy