Future of Geothermal energy in India
Geothermal
energy is the energy generated/stored in the earth’s core crust about 4000
miles below the rock surface and only some miles below in the heat pockets of
water on the crust. This is stored in the earth crust in the form volcanoes,
fumaroles, geysers, steaming grounds and hot water springs.
India being
a subtropical country is a vast resource of geothermal energy. Some of the
major geothermal provinces of India, enclose around 400 thermal springs,
sedimentary water basins and Cretaceous-Tertiary volcanic regions.
These
geothermal provinces in the country are the Himalayas , Sohana
, Cambay, Son- Narmada-Tapi rift valley ( SONATA), some of the
regions in the West coast , Godavari basins, and Mahanadi. With the
recent volcanic eruptions, some of the the Barren island’s in the
west have become one the most important geothermal provinces in the
Indian subcontinent.
On the basis of
heat harvested or stored called as enthalpy characteristics, the geothermal
systems in India, is classified into medium enthalpy (100°C-200°C) and low
enthalpy (<100°C) geothermal systems.
Medium enthalpy
geothermal energy resources are mostly the Himalayas, Narmada tapi basins,
Damodar Mahanadi and Godavari valleys and cambay basin on the west coast.
Low enthalpy
geothermal zones include some of the hot water springs on the west coast of the
country.
Estimates
suggest that energy from one third of these springs is of the order of
40.9x1018 calories. This is equivalent to the energy that can be obtained from
5.7 billion tonnes of coal or 28 million barrels of oil.
Apart from the
government organizations in the energy sector, there are some of the private
organisations like Tata power is working in exploitation of
geothermal energy.
and seeking
to more than double capacity in five years and acquire projects at home
and overseas.
Geothermal
energy in India thus looks like a huge investment zone for today assuring big
returns in the coming future.