1. Geothermal
Energy
Scien2st:
Eamonn D’Arcy

2. Where is Geothermal Energy used?
• Geothermal Energy is mainly used in Italy, New Zealand, Iceland,
Japan, the Philippines and the United States.
• In Iceland, virtually every building in the country is heated with hot
spring water. In fact, Iceland gets more than 50 percent of its energy
from geothermal sources. In Reykjavik, for example (popula2on
115,000), hot water is piped in from 25 kilometers away, and residents
use it for hea2ng and for hot tap water
• Seismically ac2ve hotspots are not the only places where geothermal
energy can be found. at depths of anywhere from 10 to a few
hundred feet below the surface virtually in any loca2on on Earth.
• The largest geothermal system now in opera2on is a steam‐driven

4. Once you get Geothermal Energy, How
• If it is heated to a higher temperature by a boiler it can be used in
buildings as hot water supply.
• It can be used to heat homes, buildings greenhouses, local resorts, fish
farms and spas
• To dry out fish
• De‐ice roads,
• Dehydra2ng onions and garlic
• Pasteurizing milk.
• Improve oil recovery,
• Underfloor hea2ng,

6. How Does a Ground‐Source Steamed
• Hundreds of meters of piping and coil are buried underground in
loops.
• Cold water is pumped down an “Injec2on Well” towards the
heated rock.
• The water becomes ho]er because of the heated rock.
• The water eventually starts to evaporate and turn into steam.
• This happens through naturally occurring "hydrothermal
convec2on"
• The steam will rise through the “Recovery Well”.
• This “Recovery Well” leads to a generator.
• The steam rotates the fan leaves inside the generator to create
electricity.

8. How Does a Ground‐Source Boiled
• Hundreds of meters of piping and coil are buried
underground in loops.
• Cold water is pumped down an “Injec2on Well”
towards the heated rock.
• The water becomes ho]er because of the heated
rock.
• This now heated water is quickly pumped out before
it turns to steam.
• The water will then flow through the Recovery Well to
a storage place.
• The storage place for the already heated water will

10. Interes2ng facts about Geothermal
• Comes from the Greek word "Geo" meaning "earth" and "Therme"
meaning heat.
• The temperature is 100 degree Celsius three miles beneath the earth. This
is an ideal temperature to boil water to generate a steam‐powered
electric power plant.
• For example, more than 8,900 megawa]s (MW) of large, u2lity‐scale
geothermal capacity in 24 countries now produce enough electricity to
meet the annual needs of nearly 12 million typical U.S. households (GEA
2008a).
• The United States has more geothermal capacity than any other country,
with more than 3,000 megawa]s in eight states.
Eighty percent of this capacity is in California, where more than 40
geothermal plants provide nearly 5 percent of the state’s electricity.

11. •

12. Bibliography
• h]p://www.drenergysaverct.com/hvac‐systems/geothermal‐hea2ng‐cooling‐
connec2cut_free‐es2mates.ppc?gclid=CLD9sc7z7qgCFYVx5QodeU8eNw
• h]p://wiki.answers.com/Q/How_does_geothermal_energy_work
• h]p://www.greenprofitsguide.com/category/green‐energy
• h]p://ww1.webanswers.com/home‐garden/how‐does‐geothermal‐energy‐
work‐7a56c8
• h]p://www.alterna2veenergysecret.com/geothermal‐energy.html
•
h]p://www.buzzle.com/ar2cles/how‐does‐geothermal‐energy‐work.html
• h]p://www.pier55.com/technology/energy/geothermal‐energy/
• h]p://www.ucsusa.org/clean_energy/technology_and_impacts/
energy_technologies/how‐geothermal‐energy‐works.html
• h]p://www.clean‐energy‐ideas.com/ar2cles/
how_does_geothermal_energy_work.html