Good afternoon. Welcome back to Energy 101, and we've
been talking about, energy resources. the reason we've been talking about
energy resources is, we need to back up, I want to back up and look at the big
picture so we don't lose our perspective. Remember that the whole thing got started
when we first started the course. Looking at energy use by society.
Society wanted and due to the fact that you can't create energy out of nothing,
we have to go find that energy due to natural laws of physics, that is, that
exists in the natural form. So we've been looking at what those
natural forms of energy are, that we utilize.
And to supply the needs that society wants to keep their houses warm to drive
their automobiles to provide lighting, to provide cooling in our homes and
buildings, and to make our lives better. In society, an we as individuals are
willing to pay a significant amount of money for that energy, but there has to
be a tremendous infrastructure behind it, the energy flow in order to supply us
with that energy. So we've been looking at the, where the
energy comes from in its natural form. And we have looked at the hydrocarbon
supplies, the nuclear energy supplies and the
renewable energy supplies. And where they're all coming from
This one shows the 2011 these numbers show the 2011 energy resources.
And where, where they're coming from, 20% of them come, of our total energy
supplies, comes from coal. 26% from oil, 36%.
Some natural gas, nuclear's 9%. and renewables, biomass is five, hydros
is three, hydro dams, hydroelectric dams is three percent.
That, we don't expect that number to change significantly.
it's due to all kinds of limitations, we dont expect Build anymore dams.
where you can't get permitting and the environmental issues, people don't want
to deal with. And so the hydroelectric situation, and
the energy we're getting from the dams is pretty much a fixed situation.
wind energy we're getting a little of 1% now.
The thermal, which is the energy from the earth, and we drill down in the earth,
and then we have solar energy. Notice that wind is about ten times as
much as solar. Even though you here a lot about solar
and we've had a lot of emphasis on solar, wind is still supplying ten times as much
energy to our society as solar is. And that's because of the cost of solar.
The cost of solar is significantly more than wind in general.
And that's where the growth has occurred. We're still a general, a free
enterprised, capitalistic system. And the cheapest solution that provides,
in this case, renewable energy is the one that will be utilized.
And this is generally when doors open. the solar's coming along and the cost is
coming down. here's, it's shown, here's our energy
resources shown as a pie chart, and we've already seen oil has about 39%, natural
gas, and then coal, and then there's the hydro that I mentioned before at 3%, and
nuclear's about 8 or 9%. biomass as I already mentioned is about
3% in 2002. And, here wind in 2002 was about 0.1%,
1/10 of one percent, which is, a small number for in 2002.
Well, how did it change in 10 years, by the end of 2011.
By the way, if I haven't mentioned it. I deal with 2011 because I like to look
at whole year periods. When you start looking at monthly data,
you get a lot of scattering of the data. And it's very difficult to make any hard
conclusions from the monthly data. I like to compare year on year, so we'll
be getting. The year, the data for 2012, from the
EIA, the Energy Information Agency, sometime around March, or about the time
this course concludes. But here is how, the pie chart looks, and
you can compare it, one with the other. That's the 2002, this is the 2011.
And 1 thing I wanted to point out, is that the numbers have changed slightly.
And this show's where, how they've changed on a 1 to 1 basis.
The blue bar right here, show;s how much has What percent we're getting from each
resource. Coal, and our percentage from coal has
gone down from about 23% or 24% to about 20%.
so we are relying less as a percent on coal.
And by the way, the total energy consumption in 2011 is about the same as
2000. to decline to about, until about 2008,
when the recession dropped it, and now it's climbed back to where it's about the
same as 2002. So 2011 total energy consumption is about
the same Of 2002. And this is showing the percent of that
total energy consumption of the natural resources and where it comes from.
You see natural gas is going up. Is going up about the same amount that
coal has gone down. That's been good for global warning
because natural gas power plants, which is primarily where it's gone And coal has
been re, been reduced. Is it produces about half as much CO2 for
each unit of electricity produced as coal does.
And that's due to the difference in the molecule being a CH4 for natural gas and
coal being all carbon. Oil, you can see the percentage for oil
has gone down slightly, and this is due to more efficient automobiles over the 10
years. And even though we are driving more miles
and there's also we changed our driving patterns.
Nuclear's about the same from 2002 to 2011.
Biomass has actually gone up, as you can see here, because there's more incentive
now with economics and the, and there's more goverment incentives.
Hydro is about the same, and wind you can see was insignificant.
in 2002, it was down around a 10th of a percent, whereas now, it's, as I showed
you, about 1.2%. Geothermal, you can see is very small and
solar is very small. I put these out here to show How much
their im, they impact, our total energy consumption.
So though, we've heard a lot about solar, and we've put a lot of emphasis on it
there's a lot of research and development going on, there's a lot of effort to
drive costs down, it's still is, pretty much an insignificant, cont, making an
insignificant contribution to our total energy picture about as far as how much
it impacts our oil consumption and our, Natural gas consumption and coal
consumption and nuclear consumption. But you gotta start somewhere.
And even though the amount of wind has gone up a factor of 10, and the solar
about the same it's still a small fraction, very small percentage around 1%
or less, both wind and solar each. for of, where we get our energy resources
from. So that's, that co, that recaps, the
energy resources that we, have and are, an we currently are getting our energy
from. And now, We'll look from here forward at
things like the conversion of this raw form of energy, be it wind or solar.
Into a form that we want and can use it. And that will, because it will see that
there's some limitatioins regarding how we convert it, how much we can convert
it, the efficiency in which we can convert it and the cost that we can
convert it. Okay, thanks for your attention, bye.