Renewable (inexhaustible) Energy Sources

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Renewable (inexhaustible) Energy Sources

• Alternative energy sources to using fossil fuels.

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Why is there a push to using renewable energy?

• 1. Help protect against harmful toxins and
  greenhouse gasses that are produced from using
  fossil fuels.
• 2. Preserve the natural resources, fossil fuels,
  that we use for energy.

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Renewable Resources

• Wind Power
• Solar Power
• Geothermal Energy
• Hydroelectric Energy
• Biomass

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Wind Power

• Harnesses the power of the wind to move the
  blades of wind turbines. The rotation of the
  blades is converted into electrical energy that
  can be stored in electrical grids.
• The bottom picture is a wind turbine in Atlantic
  City, NJ.

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Solar Power

• Trapping the suns rays into solar cells where
  the sunlight is converted into electricity.
• Used for heating, cooking, and the production of
  electricity.
• Thermal energy when heat is moving.

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Geothermal Energy

• Literally means Earth Heat
• Harnesses the heat energy from under the earth.
  Hot rocks underground heat water to produce
  steam. When holes are drilled in this area, the
  steam that shoots up is purified and is used to
  drive turbines which power electric generators.

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Hydroelectric Energy

• Comes from energy of dammed water driving a water
  turbine and generator.
• Comes from collecting energy from moving water.

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• Tidal Energy
• What is Tidal Energy?
• Tidal energy is a form of hydropower that
  converts the energy of the tides into electricity
  or other useful forms of power.
• The tide is created by the gravitational effect
  of the sun and the moon on the earth. Tidal
  energy is therefore a predictable form of
  renewable energy.
• This type of energy is obtained from changing sea
  levels.

Tidal barrage
Tidal stream generator
Tidal Fences
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Tidal EnergyHow it works

• Works by building Barrages to contain water after
  high tide, then water has to pass through a
  turbine to return to low tide
• Sites in France (La Rance), Canada (Annapolis),
  and Russia
• Future sites possibly on Severn River in England,
  San Francisco Bay

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Tidal Power

• Tidal power generators derive their energy from
  movement of the tides.
• Obviously requires large bodies of water nearby.
  Not viable on the prairies for example.
• Has potential for generation of very large
  amounts of electricity, or can be used in smaller
  scale.
• Tidal power is not a new concept and has been
  used since at least the 11th Century in Britain
  and France for the milling of grains.
• There are a number of places around the world
  that have adopted pilot projects for different
  types of tidal generators

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Biomass

• Renewable energy from plants and animals.
• Biomass contains stored energy from the
  sun. Plants absorb the sun's energy in a process
  called photosynthesis. The chemical energy in
  plants gets passed on to animals and people that
  eat them.

• We can always grow more trees and crops, and
  waste will always exist.
• When burned, the chemical energy in biomass is
  released as heat.
• The most common form of biomass is wood.

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• Biomass can be converted to other useable forms
  of energy, such as methane gas or transportation
  fuels, such as ethanol and biodiesel.
• Biodiesel, another transportation fuel, can be
  produced from left-over food products like
  vegetable oils and animal fats.

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20 Renewable Energy 2020

• http//www.youtube.com/watch?v1cysaOnlv_E