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Geothermal energy

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by

Raquel Martinez Quiroga

on 27 April 2015

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Transcript of Geothermal energy

Introduction
Geothermal energy is a
renewable
energy obtained from the earth's interior. Then it is used as hot water or transformed into electricity and many other things.
Geothermal energy in Spain
Introduction.
Raw Materials.
Extraction and uses.
World map.
Advantages and disadvantages.
Raw materials
Geothermal energy needs the thermal energy in the Earth´s interior (heat) which is a renewable source obtained from volcanoes, geysers, ...
Geo
ther
mal

ene
rgy

Advantages and disadvantages
ADVANTAGES

It is a renewable source.
Extraction and uses
Index
The Earth releases it's internal heat through volcanoes and oceanic ridges.

To transform this internal heat into light for our homes we need some basic elements.
We already have our heat source, now we need an aquifer, water and a seal.
Aquifer
Water
Seal
It is a hot rock that lets water pass through it.
Natural underground sources.
Heat source
It maintains hot water caught up.
Extraction and uses
Geothermal reservoir.
Collects this hot water and then is used as heat at homes, in aquaculture, ... as well as electric energy thanks to turbines.
So now you know how this type of heat is transformed...
into this type of heat.
Uses
There are two basic types of uses:

Direct use:



Indirect use:
electricity
DISADVANTAGES
It is cheap.
It does not pollute.
It creates jobs and economic benefits.
It reduces the dependence of fossil fuels.
It isn´t a widespread source of energy.
It has high installation costs.
Geothermal sites can run out of steam over a period of time due to drop in temperature.
May release harmful gases.
It cannot be easily transported .
Full transcript