Question

Name any two localities where small projects for harnessing geothermal energy have been installed?

Answer 1

Heat energy continuously flows to the Earth’s surface from its interior, where central temperatures of about 6 000°C exist. The predominant source of the Earth’s heat is the gradual decay of long-lived radioactive isotopes (40K, 232Th, 235U and 238U). The outward transfer of heat occurs by means of conductive heat flow and convective flows of molten mantle beneath the Earth’s crust. This results in a mean heat flux at the Earth’s surface of 80kW/km2 approximately. This heat flux, however, is not distributed uniformly over the Earth’s surface; rather, it is concentrated along active tectonic plate boundaries where volcanic activity transports high temperature molten material to the near surface. 

Although volcanoes erupt small portions of this molten rock that feeds them, the vast majority of it remains at depths of 5 to 20 km, where it is in the form of liquid or solidifying magma bodies that release heat to surrounding rock. Under the right conditions, water can penetrate into these hot rock zones, resulting in the formation of high temperature geothermal systems containing hot water, water and steam, or steam, at depths of 500 m to >3,000 m.

Answer 2

There are many places geothermal projects are located in Jalgaon in Maharastra and Tapovan in Uttarakhand.

Explanation:

• Geothermal energy is another name of thermal energy. The energy is developed from radioactive decay and earth formation to continuously heat loss. Tattapani in Chhattisgarh is the biggest geothermal energy plant in India.
• There are some disadvantage of geothermal energy that is potential emission and surface instability. Geothermal energy is utilised for cooling and heating purposes or utilised to create electricity.

Learn more about geothermal energy

Geothermal energy refers to use of heat energy trapped beneath the surface of earth, to generate electricity

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