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Flashcards in Renewable energy Deck (23)
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1

Name five forms of renewable energy

- Wind
- Solar
- Biomass
- Geothermal
- Tidal

2

Describe solar energy and name the leading producers

Photovolactic cells convert sunlight to electricity
Japan, Germany and USA

3

What are the advantages of solar energy?

- Effective on small scale
- Easy to install and low maintenance
- Long lasting
- No greenhouse gas emissions

4

What are the disadvantages of solar energy?

- Dependent on climate and so no night generation
- Need a lot for large scale production
- High initial cost

5

Give an example of solar energy production

Mildura Solar Power Station in Australia to be the biggest in the world at a cost of $420 million for 45,000 homes and reduce emissions by 400k tonnes a year

6

Describe wind energy and name the leading producers

Turbines convert kinetic to mechanical energy to a generator for electricity
Germany, Spain and Germany

7

What are the advantages of wind energy?

- Effective large and small scale
- Agricultural land undisturbed
- Suitable for remote locations
- Cheap running cost
- No gas emissions

8

What are the disadvantages of wind energy?

- Eyesore and noisy
- Climate dependent
- Threat to birds
- High initial cost
- Public dispute

9

Give an example of wind energy?

By 2007, Germany had over 18,000 turbines producing 6% of electricity and employed 64,000

10

Describe biomass energy production

Organic mass with high energy potential

11

What are the advantages of biomass?

- Low technology and cheap
- Range of crops and waste products used
- Quick to grow
- Carbon neutral

12

What are the disadvantages of biomass?

- Needs large land areas that could be used for food
- Crops vulnerable to pests
- Harvesting and processing requires a lot of energy

13

Give an example of biomass

Brazil is leading producer of ethanol made by distilled sugar cane

14

Describe geothermal energy production

Natural heat from the crust heats water so the steam powers the turbine or hot water for central heating

15

What are the advantages of geothermal energy?

- Cheap
- Produces an abundance of energy
- Reliable
- Little environmental degradation

16

What are the disadvantages of geothermal energy?

- Only available in certain locations
- Releases sulphur for acid rain

17

Give an example of geothermal energy

USA has plants in Alaska, California, Hawaii and Navada producing 0.37% of electricity

18

Describe tidal energy

Most common method is building barrages across estuaries and bays with great tidal range when collected water is released it drives turbines

19

What are the advantages of tidal energy?

- Reliable
- Low running costs
- No air pollution

20

What are the disadvantages of tidal energy?

- Limited suitable sites
- Damage to estuary ecosystem
- Expensive construction

21

Give an example of tidal energy

Brittany has the largest barrage opened in 1966 generating 24 turbines but supplies only 0.02% of France's electricity

22

Give advantages of nuclear power

- Decrease in raw material use
- Uranium costs 20% of the cost of electricity generation
- Continuous energy production
- No greenhouse gas emissions

23

Give some disadvantages of nuclear power

- Transport use makes costs not much cheaper than fossil fuels
- Takes years for radioactivity to dissolve
- Health risk