3. Introduction
Simply it means heat energy of the earth,which is generated by
the various natural process inside the earth's crust such as The
decay of radioactive elements, friction between it's core or
mentle parts and etc.Temperature of the Earth increases with
depth, about 25–30˚C/kmmost geothermal exploration and use
occur where the temperature is higher than the average of
300°C. These earth's energy is utilised by the power plants.
Heat
Earth
The dipper you go; the hotter it gets
Geo means Earth
Thermal means Heat
4. History
→
Prince Piero Ginori Conti tested the first geothermal power generator on 4 July 1904 in Larderello,
Italy.
According to Archeological rearch, Geothermal energy is one of the oldest types of power used by
humans. Archaeological evidence suggests that the earliest direct use of geothermal power
occurred at least 10,000 years ago in North America, where indigenous peoples were drawn in hot
springs for both spiritual and practical reasons.
→
→ 1913, Larderello became the site of the world’s first
commercial geothermal power plant.
→ After the Second World War, the United States
became a major producer of geothermal power
5. Types of Geothermal power plants
There are three basic types of geothermal power plants:-
1. Dry steam plants use steam directly from a geothermal reservoir to rotate generator
turbines.
2. Flash steam plants take high-pressure hot water (steam) from deep inside the earth to
rotates generator turbines. When the steam cools, it condenses to water and is injected
back into the ground to be used again. Most geothermal power plants are “Flash Steam
Plants”.
3. Binary cycle power plants transfer the heat from geothermal hot water to another liquid.
The heat causes the second liquid to turn to steam, which is used to drive a generator
turbine.
6. Working of plants
At a geothermal power plant, wells are drilled more than 3 miles deep into the Earth to
pump steam or hot water to the surface. The hot water or steam moves through a
narrow pipes at very high pressure. This high pressure water is then send to the
chamber where the turbines are situated to rotate it. After this water is condensed and
send in the earths to utilize again and again. When the turbines starts rotating,
the coil of generator starts also moving. Then the electricity generated by the
generator is steped up and send to the consumers.
7. Places
US produces 3450 MWe electricity, which is
highest in the world.
Phillippines is the second on large producer
of geothermal energy , it is approx. 1870.
IN INDIA,
In India, exploration and study of
geothermal fields started in 1970. The GSI
(Geological Survey of India) has identified
350 geothermal energy locations in the
country. The estimated potential for
geothermal energy in India is about 10000
MW.
8. Advantages
It is Environment Friendly.
It has huge huge potential.
Geothermal Is a Reliable .
It's Systems Need Little or very low Maintenance.
Unlimited Supply (unexhaustable).
Cost Savings
9. Disadvantages
Geothermal System has High Investment Costs.
Suitable land requirements for installing the Geothermal System
Greenhouse Emissions are higher near plants.
Possibility of Depletion of Geothermal Sources where it is
found.
10. Conclusion
In conclusion, we get that the Geothermal energy play a. vitral role in our life.
Geothermal energy is one of the cleanest and renewable energy sources in the
world. It has been used commercially for 70 years, both for electricity generation
and direct use, with use increasing rapidly in the past three decades.
At last, I want to say, everythings has some positive and negative aspects. And
considering it's all aspects, it has more positive aspects as compared to
negative...
