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Electricity Generation

An introduction to where electricity comes from

Rod Williams

on 1 May 2015

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Transcript of Electricity Generation

The most common way to do this is...
To coil a wire around a spinning magnet.
And that will be a another unit...
See ya then!
That leaves us with...
Nuclear Power
Magnet and Wire
Almost all kinds of electricity are generated using a magnetic field to make electrons flow.
So, how do you get the magnet to spin?
This is where the differences in energy production come in.
Electricity Generation
The big three are...
1) Coal/ Natural Gas
Nuclear Energy has a lot to consider.
We will spend much more time on this topic.
Like this.
The pos. and neg. poles of the magnetic field cause electrons to move.
Like this.
The flow of electrons is electricity.
Bar Magnet
Coil of wire
This causes electrons to flow toward the positive terminal of the wire.
Hook it up to some wires and lights...
2) Hydroelectric
3) Nuclear
The one thing that all three of these have in common is...
They all use water to spin the magnet.
Coal / Natural Gas
Coal is the most common source of electricity.
It makes up about 40% of the world's supply of electricity.
Why use coal?
(The Pro's)
1) Plentiful
2) Cheap
3) Efficient
- Coal is mined in 25 states
About 4 cents per kilowatt hour
- Natural gas in almost all
1,842 Btu's per ton, that's a lot!
What we have the most of in the Northwest.
But you need mountains and rivers.
Not every place has that.
Costs are huge to build it...
... but it gives clean energy for a long time.
All water tries to get to the ocean.
Water has high mass to volume ratio.
As it travels to the ocean, it will push things out of its way.
So, we put a paddle in the way...
Attach the paddle to a rod...
And attach the rod to a magnet...
That is wrapped in a wire coil...
What's wrong with Coal?
(The con's)
1) Dirty
2) Greenhouse gasses
3) Non-renewable
1) Dirty
Coal burning is a major source of:
- Acid Rain (nitrogen and sulfur)
- 20 different Heavy Metal toxins
Chemicals produced by coal burning accumulates in the rivers. This leads to:
Alkilization and salinization of soils...
... poor dirt for growing plants.
Strip mining has a devastating impact on the land, vegetation and wildlife.
Underground mining is dangerous and can lead to mountain collapse.
Coal mining has a huge impact on the:
Greenhouse Gasses
Carbon Dioxide
Carbon Dioxide is the the largest contributor of human greenhouse gasses.
-the combustion of coal is by far the biggest component.
Methane is produced by the decay of organic matter.
It is often found in the presence of coal veins.
Mining coal releases it into the atmosphere.
There is a limited supply
Non-renewable means that it takes million of years to produce.
But, humans only need a few years to use it up.
Oh! You say, What about all the alternative forms of energy production?
And guess what?
There are even more exotic things than that.
Try looking in that little ball...
Some Examples of exotic alternative forms of energy production could include:
Energy from the vacuum.
Nuclear Fusion
Orbital Tethering
Perform an internet search if any of those peak your interest.
Nope, not here...
Full transcript