Renewable Energy Ashfield Direct Learning Mark Hudd Ks4 Energy

What is renewable energy?  Renewable energy are sources of energy which can be used again. They do not run out or can be grown quickly.  Wood is a source of renewable energy as it can quickly be grown again in our lifetimes

Why would we use Renewable Energy And what types are there?  The reason we would use renewable electricity is because the more efficient non-renewable resources such as coal are running out and a new energy source is needed to create electricity.  The types of renewable energy are hydro power, wind power, tidal power, solar power, biomass and more.

How do renewable resources work?  Hydro power: Water stored in reservoirs above the power station is allowed through pipes to turn the turbines which create electricity.  Tidal Power: At high tide, water is trapped by a barrage. At low tide the water is released and flows back to the same level as the sea. The movement of this water drives a turbine to generate electricity.

 Waves: The rocking motion of waves makes the ‘nodding ducks’ move up and down. This movement is translated into a rotary movement which eventually turns a generator. How do renewable resources work?

 Wind Power: The force of the wind turns the blades of a wind turbine which in turn causes a generator to spin and produce electricity.  The larger the blades or wind the more energy produced. How do renewable resources work?

 Geothermal: In some volcanic areas, hot water and steam rise naturally to the surface, having been heated up by the decay of radioactive substances (e.g.. Uranium) within the earth. This steam can be used to drive turbines. How do renewable resources work?

 Solar: Solar cells rely on modern technology to transfer sunlight directly into useful electricity. This method is used in appliances such as calculators and garden lighting to even more sophisticated use such as in space probes and satellites. How do renewable resources work?

Advantages and Disadvantages of Renewable Energy AdvantagesDisadvantages No fuel costs during operations. With the exception of hydro-electric they produce small amounts of electricity. No chemical pollution.Takes up lots of space and are unsightly. Often low maintenance. Unreliable (apart from hydro-electric), weather dependant, and can’t match demand. Don’t contribute to global warming and acid rain. High initial capital outlay.