FACTS -- NO. 7
GEOTHERMAL
1.
For every 30 to 50 metres descent 1o C temperature gets
reduced.
2.
From the surface of the earth to the centre of the earth it is
nearly 6500 Kms.
3.
At the centre of the earth the temperature is nearly 6000 o
C.
4.
In 2001, geothermal energy cost between two and ten cents per kwh.
5.
It was not until the late 1940s that the geothermal heat pump was
successfully implemented.
6.
In 2006, a binary cycle plant in Chena
Hot Springs, Alaska, came on-line, producing electricity from a record low fluid
temperature of 57 °C
7.
In the geothermal industry, low temperature means
temperatures of 149 °C or less.
8.
The Earth's internal thermal energy flows to the surface by
conduction at a rate of 44.2 terawatts (TW).
9.
The Earth's internal thermal energy is replenished by radioactive
decay of minerals at a rate of 30 TW.
10.
Outside of the seasonal variations, the geothermal
gradient of temperatures through the crust is 25–30 °C per kilometer of depth in most of the world.
13.
Estimates of the potential for electricity generation from
geothermal energy vary six-fold, from 0.035 to 2TW depending on the scale of
investments.
14.
Human extraction taps a minute fraction of the natural outflow,
often without accelerating it.
15.
The
high temperature of magma isy due to the decay of naturally radioactive materials
such as uranium and potassium.
16.
Temperatures
of most magmas range from 700°C to 1300°C.
17.
More
specifically, geothermal energy comes from magma
18.
Geothermal
energy is regarded as an important renewable energy.
19.
In the binary design, hot water is used to heat a second liquid,
e.g. isobutene, which drives the electric generators, instead.
20.
2011 GAMMA-RAY source was a giant black hole.
21.
The sun releases the energy of 100 billion H-bombs every second.
22.
A tiny bit of mass can make a vast amount of energy.
23.
300 thermal springs are known to occur in India
24.
Boiling point at Puga area and with discharge ranging
up to 300 litres/min are present.
25.
Twenty six boreholes have been drilled to depths
ranging from 100 m to 620 m.
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