renewable energy sources
DESCRIPTION
Renewable Energy Sources. Renewable Sources. Renewable Energy Source: An energy source that can be replaced in a relatively short period of time. Examples: hydro-electric , wind, solar , biomass and geothermal. Hydroelectric Generation: - PowerPoint PPT PresentationTRANSCRIPT
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Renewable Energy Sources
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Renewable Sources
• Renewable Energy Source:– An energy source that can be replaced in a
relatively short period of time.– Examples:• hydro-electric, wind, solar,
biomass and geothermal
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Hydroelectric Generation:• the energy of falling water is used to move
the large blades of turbines connected to generators.
• Many use the water stored behind a dam to generate electricity.
• The dam controls to flow of water.• There are 180 hydro-electric
generating stations in Ontario.
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Advantages Disadvantages•Does not release pollution into the air or water
•Disrupts natural flow pattern
•Restrict fish movement
•Habitat loss
•Expensive to build.
•Difficult to find a good location
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Niagara Falls Power
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Photovoltaic Generation:
• Changes light energy from the Sun directly into electrical energy.
• Uses photovoltaic cell to convert the energy
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Advantages/Disadvantages of Photovoltaic Generation:
Advantages Disadvantages•Free and readily available
•Can be installed anywhere
•Does not create pollution
•Expensive and inefficient
•Can only work during the day.
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Wind Generation:• A modern wind turbine is made up of large
blades mounted on a tall tower.• As the wind blows, the blades of a turbine
turn.• The turbine is connected to a generator.
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Advantages/Disadvantages of wind
Advantages Disadvantages•Wind is free•Building and maintaining wind farms is less expensive then fossil fuels or uranium
•Disrupts scenic views
•Need large areas
•Noise pollution
•Disrupts migrating birds.
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Thermal Generation Using Biomass:• Biomass, or biofuel, is any form of bacterial,
plant, or animal matter.• Biomass is burned to produce thermal
energy.• This heats water into steam that can turn a
turbine connected to a generator to produce electricity.
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Advantages/Disadvantages of Using Biomass:
Advantages Disadvantages•renewable •Produces greenhouse
gases
•Using crops as fuels results in lower food production.
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Geothermal Generation:• Geothermal generation uses wells drilled
deep underground to access thermal energy.• Hot geothermal gases are then piped to a
generating station, where the thermal energy turns water into steam.
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Advantages/Disadvantages of Geothermal:
Advantages Disadvantages•Energy always present deep in earth’s crust.
•Can be reheated and reused.
•No greenhouse gases
•Suitable areas are rare.
•Generating stations are difficult and expensive to build.
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What Does the Future Hold?
• In Ontario, about 26% of all electrical energy comes from burning coal and natural gas, 52% from nuclear sources.
• This means that 78% of Ontario’s electrical energy is produced using non-renewable energy sources.
• Therefore, we need to develop ways to use less electrical energy!!! Jack Lay
ton's house