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Transcript of Alternative Energy
By Kennion Black and
What is alternative energy?
By definition: "Alternative energy is energy generated in ways that do not deplete natural resources or harm the environment, especially by avoiding the use of fossil fuels and nuclear power."
There are many different types of alternative energy.
Energy Source One:
Solar energy is radiation from the Sun that we can collect. (shown below)
negatively charged silicon
Placed so sunlight doesn't reflect
conducts a negative charge
Radiation from the Sun
conducts a positive charge
positively charged silicon
A Solar Panel
This changes the direct current produced by a solar panel into Alternating Current, the electricity used in most American homes.
The spare electricity is put into power lines for later use.
The power is then used for all electrial devices.
The remaining power is then put through this power box to control where the electricity goes.
This measures all the electricity generated.
This regulates the amount of electricity that enters- extra is moved to the power lines.
Solar energy is one of the best options for clean, renewable energy.
Powers poverty areas
Extra energy can be stored
no fossil fuels
Total Generation Meter
High starting cost
Pollution decreases efficency
No nighttime power
needs to be angled
Exotic materials used
Energy Source 2:
Wind energy is wind that turns blades on a turbine, which in turn turns a generator for electricity.
Wind blows in the diretion of the t
Wind turns the blades
The spinning from the blades spins a large metal shaft, which spins a gearbox that increases the spin speed by about 100x, which in turn spins the generator for electricity.
Wind energy is one of the most powerful
opportunities for power,
and one that many people have adopted today.
Low maintenance needed
Prices have reduced over 80%
reduces dependance on fossil fuels
In windy areas, electric
anies may pay
Not always reliable
Only usable with wind
Take a lot of space
To some, look ugly
Affect enviroment (noise)
Mess with TV towers
Only works when
wind blows one direction
Now, I could ramble on for a while, but...
...that would take a lo-o-o-ng time...
Thank you for watching!