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Sources Of Energy (Z) EP4
Transcript of Sources Of Energy (Z) EP4
Solar photovoltaic (PV) panels produce direct current (DC) electricity from the power of solar radiation. These can be used to run domestic lighting and appliances, or to charge batteries.
They do not need direct sunlight, they can generate electricity even on a cloudy day.
Electricity generated by wind power
This is the worlds fastest growing renewable energy. The air movement is used to drive large blades, which are connected to electricity generating turbines. These in turn generate electricity. To be an efficient energy source, the wind needs to be a constant 12mph.
Wind farms are becoming more and more common and can be sited on land or off-shore.
Electricity generated by tidal movements
The kinetic movement of sea tides that flow towards and away from land can be used to drive underwater turbines, in much the same way as wind drives turbines.
It is anticipated that tidal electricity generation could provide up to 20% of the UK's energy needs.
Hydroelectric power is when the gravity movement of large amounts of water drives turbines, which in turn generate electricity. The largest hydropower station in the UK has a power output of 1728 mega-watts (MW) of electricity.
Zero Carbon Energy Sources
When the net carbon dioxide emissions from all the fuel used is zero, this is classed as 'zero carbon fuel'. Also known as 'renewable energy'. There are four common types-
-Electricity generated by wind power
-Electricity generated by tidal movements
1. List the four most common types of zero carbon energy sources.
2. What constant speed should the wind be in order to create efficient power?
3. What sort of electricity do solar photovoltaic (PV) panels produce?
4. How does hydroelectric power work?