Geothermal energy harnesses heat from deep within the Earth, believed to come from radioactive elements in the core. It is a limitless alternative energy resource that is exploited through drilling pipes 3 km into geothermal reservoirs, which may contain steam, boiling water, or hot water. There are several types of geothermal power plants that utilize these resources in different ways, such as dry steam plants using steam over 235°C, flash steam plants separating high pressure hot water, and binary plants using lower temperature water to power turbines. The Philippines has become a major producer of geothermal electricity through plants employing these technologies.

1. ENERGY
FROM
VOLCANO

2. What is Geothermal Energy?
It is the heat coming from the depths of
the Earth. It is believed that the heat is
due to radioactive elements from the
core.
A source of energy that is limitless and
is considered a very good alternative
energy resource.

3. Geothermal Trivias!
Philippines was declared as the second
largest producer of electricity from
geothermal resources.
Renewable Energy Act of 2008 (RA
9513)
An implemental law that supports the
exploitation and use of geothermal

4. How is geothermal energy
harnessed?
A geothermal reservoir may produce
steam only, boiling water and steam
or hot water not reaching boiling
point. A pipe is drilled into the Earth
about 3 km deep to get the resource

6. Types of
Geotherm
al Power
Plants

7. Dry Steam Plant
*Make use of steam having
temperatures of 235 degree
Celsius or higher.
*This source has very little water
and is almost all steam.

8. Dry Steam Plant

9. Flash Steam Plant
*Make use of high pressure hot
water to produce steam.
*High pressure hot water is
brought to the surface in a
steam separator chamber.

10. Flash Steam Plant

11. Binary Steam Plant
*Make use of hot water with
temperatures from 57 degree
Celsius to 93 degree Celsius.

12. Binary Steam Plant

13. Flash/Binary Combined Cycle
Plant
*This is done in
geothermal reservoirs
which yield both steam
and hot water.

14. Flash/Binary Combined Cycle
Plant

15. Geothermal Power Plant