learning goals: i can name the different sources of renewable and non-renewable energy production...
TRANSCRIPT
Learning Goals:• I can name the different sources of
renewable and non-renewable energy production and how power is generated.
• I can assess some of the advantages and disadvantages of each type of energy production.
Renewable and Non-renewable Energy Sources
Types of Resources
Non-renewable resources: Cannot be replaced once it is used up.
Renewable resources: Can be re-used or replaced.
Generating Large Amounts of Energy
Using a generator: They transform kinetic energy into an electric current. Magnets inside a generator are rotated by a turbine, a
machine that uses the flow of a fluid (water) to turn a shaft.
The magnets spinning pulls electrons away from their atoms and creates a flowing current.
Current is sent through transmission lines to cities.
https://www.youtube.com/watch?v=20Vb6hlLQSg
Examples of Generators
The Million-Dollar Question
Where does the energy come from to spin the turbine?
The Million-Dollar Answer
Water (Hydro)
Heat (Fossil fuels,
biomass, nuclear, geother
mal)
Solar Wind Tidal
Hydroelectricity
Harnessing the power of flowing water. Dam built to hold water ADVANTAGE: Inexpensive to produce electricity,
Clean DISADVANTAGE: Environmental, expensive to build.
Thermoelectric Plants
Fuel heat (thermal) produce steam spin turbines
Fossil Fuels
Burn Fossil Fuels (coal, oil and natural gas). ADVANTAGE: Stations can adjust quickly to
changes in demands. Cheap* DISADVANTAGE: GLOBAL WARMING!
*Depends on cost of fuel
Biomass
Organic material made up of plant and animal waste.
Two options: Burn the waste Collect the methane from
decomposing organisms and then burn as a fuel.
ADVANTAGE: Uses compost
DISADVANTAGE: Still adds CO2 to the atmosphere
Nuclear
Atoms of uranium are split in a chain reaction. Produces an ENORMOUS amount of energy.
1kg of uranium = 50 000kg of coal ADVANTAGE: Lots of energy per $, No CO2
DISADVANTAGE: Waste must be stored for thousands of years.
Nuclear Waste Storage
Geothermal
Water is heated by hot rock deep in the Earth’s crust. Rises to surface as hot water and steam.
ADVANTAGE: Natural, no CO2
DISADVANTAGE: $ to dig and harness the energy.
Wind
Turbines use the energy of moving air to spin their blades, which are connected to a generator.
ADVANTAGE: No greenhouse gases. DISADVANTAGE: Wind isn’t constant, impact
on animals?
Tidal
Uses the energy of the gravitational pull of the moon (when tides move in or out).
ADVANTAGE: Natural, no CO2. DISADVANTAGE: Could harm wildlife, still
very new.
Solar
Solar Panel uses solar cells to convert the sun’s rays directly into electricity.
ADVANTAGE: Works for smaller appliances and remote areas; clean energy.
DISADVANTAGE: Costly and not very efficient per solar cell.
Solar Thermal
Mirrors focus sunlight onto a liquid that is heated and used to turn water into steam to drive the turbines.
Energy Production in Ontario
Future of Energy in Ontario
Our goal is to be SUSTAINABLE.
All 5 Thermal stations will become Biomass stations by 2014. DONE!!!
Wind energy is the fastest growing source of energy production.
Continue to develop safe nuclear waste storage in Canada.