School project on energy resources for the bilingual section of the class of Technology.

1. Ana Bugallo & Julia Martínez, 3ºA.

2. - INDEX:
1. Explanation of this energy.
2. How these power plants work.
3. Advantages and disadvantages.
4. Hydroelectric power plants in Galicia and Spain.
5. Hydroelectric power plants in Europe and the
world.
6. Conclusions.
7. Bibliography.

3. 1. Explanation of this energy.
 This energy is obtained
from the fall of the
water from a height to a
level below which causes
the movement of
hydraulic or turbine
wheels.

4. 1. Explanation of this energy.
 Hydropower
harnesses the power
of moving water.

5. 2. Working of this power plant.
• This kind of power plant
collects water in a dam.
• When we open the doors
of the dam, the water
falls and this movement
produces energy.

6. 2. Working of this power plant.
 When the water enters  The transformer turns
the power station, it the force of the water
moves the turbine. into electric energy.

7. 3. Advantages and disadvantages.
ADVANTAGES.
1. It’s a renewable energy, so it’s good for
the environment.
2. It decreases the effect of
greenhouse gases.
3. It controls the risk of floods.
4. Doesn’t produce carbon dioxide.

8. (ADVANTAGES)
5. High energy yield.
6. It is completely safe for people, animals or
property.
7. It doesn’t generate heat or emits
pollutants.
8. It’s autoctonous, avoiding exterior
imports.

9. 3. Advantages and disadvantages.
DISADVANTAGES.
1. The construction of dams can flood
towns and cities.
2. Destruction of nature.
3. Alteration of ecosystems.
4. Loss of fertile land.

10. (DISADVANTAGES)
5. Sediment loss.
6. It alters the normal development of
biological life (animal and plant) of the
rivers.
7. Reservoirs generate germs
and diseases by stagnation.

11. 4. Hydroelectric power plants in
Galicia and Spain.
GALICIA: 38
hydroelectric
power plants.

12. Galician hydroelectric power
plants
•This is a picture
of Fenosa’s
reservoirs in
Galicia.
• Our community
produces almost
¼ of the total
hydroelectric
power in Spain.

13. Galician hydroelectric Power
Plants
There are:
- 22 in Ourense
- 7 in A Coruña
- 6 in Lugo
-3 in Pontevedra
A total of 38
hydroelectric
power plants

14. San Sebastián II hydroelectric
power plant.
 It’s the biggest
hydroelectric power
plant in Galicia. It’s on
the Sil river.
 It has got a power of
440 MW.

15. Spanish hydroelectric power plants
 This is the
evolution of the
installed
power in Spain.

16. Spanish Hydroelectric Power Plants
 This map shows the power plants larger than 20 MW. The letters
indicate the names of the 10 plants which are larger than 300 MW.

17. 5. Hydroelectric power plants in
Europe and the world.
The Europeans are the second largest consumers in the world.

18. 6. Conclusions.
 We think these power plants are a good
idea because, recently, they have built mini
hydro plants, more respectful with the
environment and beneficial for
technological progress, achieving a good
performance and a reasonable economic
viability.

19. 7. Bibliography.
 http://educasitios2008.educ.ar/aula156/hidraulica/
 http://renovasenergias.blogspot.com.es/2008/11/venta
jas-y-desventajas-de-la-energa_25.html
 http://twenergy.com/energia-hidraulica/ventajas-de-
la-energia-hidraulica-433
 http://es.wikipedia.org/wiki/Energ%C3%ADa_hidr%C
3%A1ulica
 http://augasdegalicia.xunta.es/es/1.4.htm

20. 7. Bibliography.
 http://www.ejecutivos.es/noticia/33490/Empresas/IBE
RDROLA-finaliza-con-exito-las-pruebas-de-puesta-
en-marcha-de-la-central-de-San-Sebastian-II.html