Energy Project

Energy: Alternatives to burning Energy: Alternatives to burning fossil fuelsfossil fuels

Presented by…Presented by…

Ryan_volk

Different kinds of energy…Different kinds of energy…

• Wind power• Solar power

• Hydroelectric power• Geothermal power

• Biofuels• Biomass

• Tidal power• And many more!

We will be only talking about the We will be only talking about the first three of those seven first three of those seven mentioned on the last slide…mentioned on the last slide…

Sit back, and enjoy the show!Sit back, and enjoy the show!

~Wind Power!~~Wind Power!~ Is clean- it doesn’t use Is clean- it doesn’t use

fossil fuels.fossil fuels. Effective- it has the Effective- it has the

potential to produce potential to produce 5 5 times times the world’s the world’s current energy use in current energy use in all forms.all forms.

Can be made small Can be made small scale to power homes.scale to power homes.

~ How it works ~ How it works ~~The blades are tilted, to

make the rotor turn. When wind hits them, it pushes the blades in a (usually) anti-clockwise motion.

The motion of the rotor turning causes a series of gears to turn. The motion causes a generator to turn, making electricity.

The most common form of wind turbine is the 3-bladed form, because it reduces stress on the tower.

~Downsides to wind power~~Downsides to wind power~

Kills 71 000 birds Kills 71 000 birds per year. (in U.S. per year. (in U.S. and U.K. alone)and U.K. alone)

Noise pollutionNoise pollution ““Shadow flicker”Shadow flicker” Prone to Prone to

breakdownbreakdown

# Solar Power! ## Solar Power! #

There is more potential for solar There is more potential for solar power in the futurepower in the futureCan be used to directly heat water or Can be used to directly heat water or homeshomesGood for the Good for the environmentenvironment

# How it works # How it works ## There are two kinds of solar energy.There are two kinds of solar energy.

One is the direct heating of homes/ food, by One is the direct heating of homes/ food, by using the sun’s heat.using the sun’s heat.

This is accomplished by using solar mirrors or This is accomplished by using solar mirrors or panels to gather heat in one area.panels to gather heat in one area.

The other is using the sun’s heat to boil The other is using the sun’s heat to boil water, which creates water vapor.water, which creates water vapor.

This gas is then used to turn turbines, which This gas is then used to turn turbines, which in turn power the electrical current or home.in turn power the electrical current or home.

# Downsides to Solar power ## Downsides to Solar power # Doesn’t work on cloudy daysDoesn’t work on cloudy days Solar panels are expensive…Solar panels are expensive… And they are easily damaged!! (if And they are easily damaged!! (if

birds poo all over it…?)birds poo all over it…?) They are also quite They are also quite

hard to replace. (but hard to replace. (but getting easier to getting easier to acquire everyday)acquire everyday)

= Hydroelectric Power! == Hydroelectric Power! = More than 70 percent of the earth is More than 70 percent of the earth is

covered in water.covered in water. This water can be harnessed to turn This water can be harnessed to turn

turbines to make powerturbines to make power You could filter water after you use it for You could filter water after you use it for

energy, and then use it for drinkingenergy, and then use it for drinking China is well on it’s way to mass China is well on it’s way to mass

hydroelectric usagehydroelectric usage

= How it works == How it works = Workers build a dam upstream a river.Workers build a dam upstream a river. They create a channel in the dam to let water They create a channel in the dam to let water

throughthrough They build a turbine at the bottom of the dam. They build a turbine at the bottom of the dam.

•This turbine turns a generator to create power!

•A good example is the Jones Lake Reservoir in the cascade mountains. The water flows from the top of the mountain, through a turbine down to near the road.

=Downsides to hydroelectric power==Downsides to hydroelectric power=

Can only be used in places with rivers (like not Can only be used in places with rivers (like not in the middle of a desert, where solar power in the middle of a desert, where solar power might be more effective)might be more effective)

Can be damaging to river ecosystemsCan be damaging to river ecosystems If the dams fail, water can come gushing out. If the dams fail, water can come gushing out.

An example is the Banqiao dam in china, An example is the Banqiao dam in china, where the flood killed 171,000 people.where the flood killed 171,000 people.

That’s all for now. Remember to find new ways to save fossil fuels, and have fun with it!!!

Credits--Pictures: google images & wikipedia

Information: Wikipedia; confirmed by google sites

More credits

All the work done by Ryan S… except some.

Remember, there are many, MANY different ways to make electricity, like the ones on the second slide and variations thereof.