Refresh. What is non-renewable energy? What are some examples? What are some good things about renewable energy?

Transcription

1 Refresh What is non-renewable energy? What are some examples? What are some good things about renewable energy? What are some bad things about renewable energy?

2 Renewable Energy Sources

3 Why is it important for us to start switching to renewable energy?

4 How much of the energy you use is renewable?

5 Renewable Energy Renewable Energy: o Is generated from natural resources that can be replenished (ex. solar, wind, water)

6 In this slideshow... We will examine: Hydroelectric power Solar power Wind power Tidal power Geothermal power Biomass power Hydrogen fuel cell power

7 Notice: We are going to start with a quick review of these renewable energy sources first. We'll look at the pros and cons of each of them later.

8 Hydroelectric Power Hydroelectricity is electricity that is generated from falling or flowing water. This is why people in Ontario often call electricity "Hydro" (although it technically means 'water' in Latin).

9 Hydroelectric Power Power is made by turning turbines that are connected to a power generator. Steam turns the turbines in coal and nuclear power. Water turns the turbines inside dams. Dams are best built where the water is flowing fast because of a drop in altitude (height).

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11 Hydroelectric Power How it works

12 Hydroelectric Dam in Niagara Falls

13 Solar Power Solar Power is power generated by harnessing the energy of the sun's rays. It can be used to heat houses and water, and generate electricity.

14 Solar Energy Link full video here

15 Wind Power Wind power uses kinetic energy or the energy of motion in moving air. It has been used for a long time to grind grain or pump water, and it still is in some places!

16 Energy 101: Wind Turbines video link here

17 Wind Power Wind can turn turbines in large windmills. When you put a bunch of them together, it's called a wind farm.

18 Wind Power Wind farms can also be in water.

19 Wind Power Some windmills are vertical. The Quebec government installed this one on the Les Îles-de-la-Madeleine - - it hasn t really ever worked!

20 Wind Power Others are called horizontal-axis turbines.

21 Wind Power You can even get small ones to put in your backyard.

22 Tidal Power A tide is the alternate rising and falling or the ocean on a shore or coastline caused by the gravitational pull of the moon and the rotation of the earth. The movement of the water as the tides rise and fall moves the turbines to create electricity.

23 Tidal Energy video link here

24 Geothermal Power Geothermal energy is heat that is generated within the earth's core. Temperatures hotter than the surface of the sun are produced deep inside the earth because of the slow decay of radioactive particles.

25 Geothermal Energy Video link here

26 Biomass Energy Biomass refers to organic plant material and animal waste Biomass contains energy stored from the sun Examples include: o Wood and wood products (like bark and sawdust) o Agricultural crop leftovers o Animal manure and food processing wastes o Organic portions of municipal soild waste

27 Converting biomass to energy It can be burned to create heat It can be heated (not burned) to break it down into gases, liquids and solids that can be processed to make fuels like methane It can be fermented to create biofuels such as ethanol which can be used to power vehicles

28 Biomass Fuel Energy

29 Hydrogen fuel cells New source of energy It is a cross between an electrochemical cell (like a flashlight battery) and a generator It uses hydrogen and oxygen power fuel cells to make electricity The only by-product is water The hydrogen and oxygen must be continually supplied to create energy

30 Uses Powering electric vehicles Providing emergency power to hospitals To provide portable sources of energy (ie. Laptops and cellphones) To power space vehicles

31 Compact, High Powered Hydrogen Fuel Cells

32 Compact, High Powered Hydrogen Fuel Cells Video link here

33 Question Time Answer the questions on your worksheet