1. Renewable Energy Resources
Monday, 19 November 2018

2. List some renewable energy resources
Hydroelectric
Wind
Solar
Tidal
Wave
Geothermal
Biomass

3. Hydroelectric video Using moving water to drive turbines Advantages
No emissions
Cheap to run
Disadvantages
Limited locations
Environmental impact of dams

4. Wind animation Using wind to drive turbines Advantages No emissions
Cheap to run
Disadvantages
Low power output
Only work when it is windy

5. Solar Converting sunlight to electricity video Advantages No emissions
Cheap to run
Disadvantages
Expensive to produce
Low power output
Inefficient

6. Biofuels Biofuels are made from living or recently living organisms
Examples: methane from animal waste, rapeseed oil, ethanol from sugar cane, woodchip
Biofuels are renewable as long as the source is replaced at the same rate it is used
Biofuels release carbon dioxide when burned.
They are carbon neutral because the amount of carbon taken into the organism when it living should equal the amount of carbon given out when it is burned
animation

7. Exam Question
An island with a small population currently generates electricity for it’s residents using an oil-fired power station which needs to be replaced. Compare the advantages and disadvantages of replacing the power station with renewable options on the island

8. Model Answer Advantages of using renewable resources
Small population does not require high power output
Avoid high building costs
Avoid difficulty/expense of transporting fuel to the island
Avoid difficulty managing waste
Less/no atmospheric pollution
Reasons why renewables may be appropriate:
Windy
Surrounded by water - possibility of using wave/tidal
Wind/wave/tidal/hydroelectric/solar would not need fuel
Disadvantages of using renewables:
Continuous supply of electricity needed so one (weather dependant) renewable would not be enough
Lots of the coastline may be taken up installing wave/tidal/wind
Visual pollution

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