1. 2.Alternative Energy Sources

2. Alternative Energy Sources
Solar Energy
Wind Energy
Hydro Energy
Tidal Energy
Geothermal Energy
Nuclear Energy
Biomass

3. Solar energy
Solar electric or photovoltaic (PV) systems convert sunlight (insolation) into electricity.
Advantages
Renewable – carbon neutral
30 Year Lifetime, low maintenance
Reduced electric bill
Disadvantages
High initial cost
Slow payback
Can be unreliable unless you're in a very sunny climate.

4. Solar energy Electric Power Capacity (MW)
United States
970,000
Renewable
97,000
Solar
400

5. Wind energy
Wind power is the conversion of wind energy into a useful form, such as electricity, using wind turbines.
Wind Advantages
Renewable – carbon neutral
Very large resource
Economically competitive
Large and Small scale applications
30 Year Lifetime
Wind Disadvantages
Regional
Intermittent
Some environmental issues

6. Wind energy Electric Power Capacity (MW)US
970,000
Renewable
97,000
(10%)
Wind
6,000

7. Nuclear energy
Nuclear energy originates from the splitting of uranium atoms in a process called fission. At the power plant, the fission process is used to generate heat for producing steam, which is used by a turbine to generate electricity.
Advantages
Nuclear power plants could still produce electricity after coal and oil become scarce.
Nuclear power plants need less fuel than ones which burn fossil fuels.
No CO2 emission
No Pollution
Disadvantages
nuclear weapons
Nuclear accident
Nuclear waste disposal problems.
Nuclear reactors only last for about forty to fifty years.

8. Nuclear energy Electric Power Capacity (MW)US
970,000
Nuclear
203,700(21%)

9. Geothermal energy
Geothermal energy is heat from within the earth.

10. Tidal energy
Tidal energy is created by the relative motion of the Earth, Moon, Sun, and the gravitational interactions between them.

11. Link