9.0 Sustainable energy sources
Sustainable sources of energy –are the natural resources that re used in the production of electricity without destroying the environment.
Ø The following are natural sources of energy
i. Water energy (hydroelectric energy)
ii. Solar energy
iii. Wind energy
iv. Sea wave energy
v. Geothermal energy
vi. Tidal energy
9.1 Water energy
Water energy –is the energy obtained from running water by use of turbines and generators.
Importance of water energy
i. The energy is virtually available. Water freely from various sources like rivers
ii. It is environmental friendly since no waste or pollution
iii. It is more reliable than other sources like wind, solar and wave power
iv. It increase power very quickly
v. Electricity can be generated constantly since there is a constant flow of water
Applications of water energy.
i. In industry
ii. Lighting purposes for example in homes, schools, hospitals and offices
iii. Heating and cooking
iv. In health facilities
9.2 Solar energy
Solar energy –is the energy from the sun.
Applications of solar energy
i. Provision of electricity that is used by electric appliances such as television and radios
ii. For lighting purposes
iii. Drying clothes and farm produce is done well with the availability of the sun
iv. Heating water
9.3 Wind energy
Wind energy –is the energy obtained from the wind
Applications of wind energy
i. Used to turn generators that facilitate the production of power
ii. Used to move ships, boats, pump water and grind corn
Disadvantage of wind energy
i. Wind energy is not reliable
ii. Wind are variable
iii. The wind turbines are noisy and can spoil the landscape
iv. Large wind sites are required
9.4 Sea wave energy
Sea wave energy –is the energy obtained from the series of swells of seawater
Applications of sea wave egergy
i. Used to drive generators
9.5 Geothermal energy
Geothermal energy –is the energy generated by the flow of heat from the earth’s surface
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