122303
Renewable
energy resources
- Hydroelectricity
- Usually involves flooding a valley by building a dam
(Building a dam is VERY expensive!
- Rainwater is caught and allowed out
through turbines
- When MORE electricity is needed, more water can be
let out through the turbine
- Usually involves flooding a valley by building a dam
(Building a dam is VERY expensive!
- Wave Power
- Waves go UP and DOWN which can be
used to drive a generator
- It's fairly unreliable, (it's weather dependant)
- It doesn't produce huge amounts of energy, but it can
be useful at small villages
- Waves go UP and DOWN which can be
used to drive a generator
- Tidal Barrages
- They're big dams built across river
estuaries with turbines in them
- The water drives the turbine
- Very reliable, but extremely expensive to set up!
- They're big dams built across river
estuaries with turbines in them
- Wind Power
- The wind turns the blades
- There's no pollution!
- Spoils the view and very noisy
- Only work when it's WINDY
- The wind turns the blades
- Solar Cells
- Used to generate electricity on a
SMALL scale
- Often used in remote places
- In sunny countries they are very
reliable
- Used to generate electricity on a
SMALL scale
- Geothermal energy
- Only possible in places where hot rocks
lie close to the surface
- Water is pumped in
pipes down to hot rocks
- Water gets heated up and turns into
steam to drive a generator
- Very expensive
- No enviromental problems and it's a
brilliant way of producing energy
- Only possible in places where hot rocks
lie close to the surface
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