1. Laura Aparicio Recio
Irene Lopez del Reino 3ºA 2011-2012
ELECTRIC POWER
PLANTS

2. INDEX
● Conventional electric power plants
-Nuclear power plants
-Fossil fuel thermal power plants
-Hydroelectric power plants
● Non-conventional electic power plants
-Wind power plants and wind farms
-Solar power plants
-Geothermal power plants
-Biomass thermal power plants
-Ocean power plants

3. The nuclear power plants are specials thermoelectric power plant.
Althught they are thermoelectric power plants, they don't produce heat
by burning fossil fuels, such as coal,or oil,so they produce energy by fission of
Uranium or Plutonium atoms
.
The structure is formed by a contaiment building at the backrground,that is where
The nuclear fission take place.
NUCLEAR POWER PLANT

4. How does nuclear power station
function ?

5. ● The reactor is where fission take place.The uranium is
placed in very thin rods about 4 m long know as fossil rods
● Control rods regulate the power produced by the reactor
and can be raised and lower.
● Water is pumped around the reactor. This water is used to
refrigerate the reactor.
● The primary circuit: water enters a steam generator. Then
it flows back to reactor.
● The water in the secondary circuit is transformed into
steam, that moves turbines and collect the energy that it
produce in the collector connectated to the turbine.

6. Fossil fuel thermal power plants
A fossil-fuel power station is a type of power station that burns fossil
fuels such as coal to produce electricity.
Fossil fuel power stations have machinery that transforms the heat
energy of combustion into mechanical energy, which then operates an
electrical generator.

7. How does thermal
power stations
function?

8. Steps to transform certains materials such as coal, in
thermal power stations:
1st
step: Coal is burned in to the boiler to produce heat.
2nd
step: Thermodinamyc process consist of:
-The heat produce by burning fossil fuel materials boils
water and transform it into steam.
-The steam is then piped to a turbine.
-The impulses of turbine moves the turbine.
-Finally, steam is condensed and move into the boiler to
repeat the cycle.
3rd
step: Rotation of the turbine rotates the generator to
produce electricity.

9. Hydroelectric power plants
The hydroelectric power plants are stations where
energy is produced by the force of falling water.
The water moves a turbine connected to a
generator that collect the energy that water
creates.

10. ●Non-conventional electic power plants
-Wind power plants and wind farms
Wind stations are the ones that transform wind energy into
another usefull kind of energy.
A wind farm consist of almost a hundred of winds turbines
connected to electric power transmission network.
Parts of turbines;
●
Rotor blades: Captures wind energy.
●
Shaft: Channelizes the energy to a generator.
●
Generator: Collect energy.

11. Solar power plants.
That kind of power plants creates energy by transforming
the heat and light from the sun.
There are two types;
-Solar thermal energy: It stores the heat of the sun, which
transform water into steam, that moves turbines which are
connected to a generator that collect energy.
- Photovoltaic energy: Is a method of generating electrical power
by converting solar radiation into direct current electricity.

12. Geothermal power plants
The geothermal power plants are plants where energy is created by
the earth's interior heat.
Geothermal power is cost effective, reliable, sustainable, and
environmentally friendly, but has historically been limited to areas
near tectonic plate boundaries.
Geothermal electric plants were traditionally built exclusively on the
edges of tectonic plates where high temperature geothermal
resources are available near the surface.

13. Biomass thermal power plants
The biomass thermal energy consist in
burning the natural waste and rubish, such
as plants, animals, food...
It produces natural gases that provides
heat to water, and wich transforms it into
steam, that later will move a turbine
connected toa generator that collects
energy.

14. Ocean power plants
The ocean power plants produce energy by ocean waves
movements.
That movements move a turbine connected with a generator that
stores that energy.
The waves are produce by the wind in contact with surface.
If the waves move slow, the energy will be lower than if the waves
are faster.

15. Enviromental impacts
●
Conventional enery impacts:
- Fossil-fuels thermal power plants: Athmosferic pollution from
gas combustion
- Nuclear power plants: Danger of radiation and contamination.
- Hydroelectric power plants: Produces changes in the
enviroment.
●
Non-Conventional enery impacts:
-Wind power: Visual and sound impact.
-Solar power:Affecfs ecosystems as it covers large areas.
-Ocean power: Envirometal changes resulting from required
construction work.

16. Fernandosax's article
●
Essay of the wind turbine that creates water from thin air
The company (CNN) aims to start rolling out the giant products in arid countries where
water resources are scarce.
Thy have thought in a device called “air blower”. It is a wind turbine that has an electric
cooling compressor situated behind the propellers, so it extracts humidity from the air and
the water is stored is stored in a tank.
There are some countries that have little or no access to safe drinking water. The problem
is that these countries can´t afford this devices because they are very expensive, but with
a lot of production, costs will decrease.
●
Personal opinion: For us, water is an important priority.
A lot of people suffer water shortages so these devices can help. But the problem is the
cost of manufacture, and we think these sites with high temperatures and water shortages
couldn't allow it.
It may have a future because it is derived from inexhaustible natural sources.
We think that 1000 L of water are not sufficient for a town of 2000 or 3000 inhabitants.