How mirrors could power the planet… and prevent wars | Hard Reset by Freethink

– This might look like a death ray, (dramatic music)
(death ray shooting) but it's not. (dramatic music) It's actually. – One enormous, very
accurate magnifying glass. – This magnifying glass
has a technical name, a sunlight refinery. To use it, find somewhere really sunny, plop down a bunch of mirrors, bounce the sunlight into a single spot and you can melt just about anything. Okay, so it is kind of death ray-ish. Why do this? Because manufacturing steel or
cement requires a lot of heat and making something super hot has historically meant burning dinosaurs. – You look at the massive carbon footprint that is associated with
these industrial applications and it can't be ignored.

– 20% of global carbon
emissions to be precise. And because this technology is so good, it might just change the
entire energy industry. (banging) And prevent World War III in the process. (dramatic music) This is "Hard Reset," a series about rebuilding
our world from scratch. (people screaming) (dramatic music) Just east of Six Flags and north of LA is a place called Lancaster, which is very flat, very hot and a perfect place to test a takeover of the world's energy supply. (dramatic music) Yeah, that sounded more Bond villain-y than I thought it would. Anyway, these are called heliostats and the reason this solar
refinery works so well is that under these mirrors and shot glasses are pretty simple motors that they can control remotely.

And this allows the
mirrors to change angles throughout the day, depending
on where the sun is. How do they know where the sun is? (dramatic music) Interns. No, AI, of course. – You need to take each
of thousands of mirrors and point them very, very precisely, accurate to about 1/10
or 1/20 of a degree. – That's Bill Gross, genius visionary and founder
of over 150 companies. (inspirational music) Also super nice guy. – Thank you, I really appreciate it. – At the top of the tower, high-resolution cameras
monitor the position of the mirrors below. – You can actually see the two at the top are the easiest to pick out 'cause they're on booms
above the receiver. – So Heliogen gets all those mirrors to reflect sunlight into
that big target at the top. – So what we've got just above us is the solar receiver. So you can see that's what
we saw from ground level. That's where that concentrated
sunlight is focused when the field is operating. – The cameras know if the mirrors are bouncing into the sun because those cameras
are assessing the quality of the sky's blue. Let's break that down with
Steve, who has cool tattoos.

– This is my robot battle armor and what I have here is a
jungle on an alien planet with robots tending the garden. – And is in charge of the
technology stuff here. – What these cameras see is the reflection of the sky close to the sun. Close to the sun, the
sky appears very bright from the scattered
sunlight coming through it and the further away
from the sun you look, the darker or less bright that
patch of sky appears to be. – So the cameras look at the color blue and the AI uses that information to assess the distance from the sun, deduce the orientation of the mirror and therefore, where the beam is going. – So every few seconds, we get a measurement of
where that beam is going and we can command the heliostat
to make small corrections to optimize its tracking.

In this industry, that is
a complete game changer 'cause now we don't rely on the hardware to be so precise, we have
software to make it precise. So it really changes everything about how that plant operates and allows us to reach
higher performance levels at a much lower cost. – So software that controls
accuracy, not hardware. And the more accurate those mirrors can be throughout the day, the fewer
of them they actually need. More importantly, it allows Heliogen to do something that no other
concentrated solar refinery has been able to do. Generate temperatures north
of 1,000 degrees Celsius. – People have done mirror
concentration before but they've achieved 400
degrees, 500 degrees. We've achieved 1,500 degrees. – That heat is important because solar energy needs
to be used immediately or stored somehow. Batteries are expensive and problematic but you know what's cheap and safe? Just normal rocks. – You have a rock collection? – It's a mineral collection! – And we take that high temperature and we bring it down into a rock bed.

We literally heat rocks to
1,000 degrees Centigrade. – The temperatures are so high, the metal actually can't take it. So we put the insulation on the inside to protect the steel from
those high temperatures. – If you heat rocks to
1,000 degrees Centigrade with the photons, they now stay hot even after the sun goes down. Those rocks are in an
insulated tank, like a thermos. And they'll stay hot for a week. – Those rocks act as batteries, storing energy that can be used to generate power 24 hours a day.

– It allows us to power things that need to run around the clock. And civilization does
run around the clock. (dramatic music) – But wait a minute, haven't we heard this all before? How solar energy is gonna
revolutionize the world? (dramatic music) The difference here seems
to be that everything at Heliogen is built around scale. This plant we went to is only a test facility, 400 heliostats. A proper sunlight refinery will be 40,000 heliostats. – So 100 times as much solar collector as what we have here. – To build refineries all over the world, they're betting on small. – Make all the mirrors small so they can be factory produced and make them easy to roll out because we don't need
cranes or heavy equipment to deploy them. Our vision was to make this like farming, so we could cover lots of
ground very inexpensively.

Almost like a harvester or a
tractor planting rows of seeds. That is critical because
to power the Earth, we need to cover hundreds of square miles, which is actually not that much to power the whole planet. – Really? – But covering hundreds
of square miles needs to be done cost effectively. – We essentially designed
this to be highly automated, robotic tractors that
can carve the trenches, place the heliostat foundations, pour the concrete and then the drives and the mirrors are set on afterward in
a very efficient way. – So the plan is that these
refineries go in places that are flat with lots
of sun like desserts… deserts. Deserts. Then they take that concentrated sunlight, convert it to electricity, put that electricity
through an eletrolyzer and split a water
molecule to get hydrogen. – Green hydrogen can be put in pipelines and moved thousands of miles or put on ships and moved across oceans. The powerful thing about that is we can then make the energy where the sun is good and move
it to where the sun isn't. And that's what we need to do to power civilization. Beating the price of fossil fuels is the only thing that matters 'cause otherwise people will
keep burning fossil fuels if they're cheaper.

But if we can be even a
fraction of a cent cheaper than fossil fuels, the world will adopt this at scale. – And so what happens if
this is adopted at scale? Let's picture a scenario where the world is powered by
the sun, mirrors and rocks. – My dream, by the end of this decade, would be to have 1,000 towers in the southwest United States, 1,000 towers in Australia, and 1,000 towers in the
Middle East and north Africa. That way, we can make
energy for almost all of the continents because we can move the energy from where the sun is good in those deserts to where
the people who need it live.

(pensive music) – In total, it would take an area about the size of Alaska
to produce enough energy to meet today's consumption
rates and with that, we could change the
environment, and geopolitics. (dramatic music) How many wars have been fought, how many people have
died essentially for oil? And those geopolitics are, in a way, the inspiration for this whole endeavor.

– I do have one story about how I lived through the energy
crisis when I was a kid. It was 1973 during the Arab oil embargo. There was a shortage of gasoline. So there were long lines of cars waiting at the gas stations on Ventura Boulevard, just to get your $5 of gasoline. My mother would wait in that line with me in the backseat of the car and I was thinking as we waited an hour to get our gasoline, thinking about why is it
that there's somewhere else in the world that could choose to shut off our supply and now people are suffering? Why don't we have another way of getting our energy that's more local? (dramatic music) – We have regular conversations about climate refugees and about the wars that are fought over fossil fuels.

We are looking to stabilize
the global politics. – The sun is the most evenly distributed natural resource we have, except for air, so why can't we take that resource and convert it to the energy
we need near where we are and not have to take it
from someone else far away? So I feel like my whole life and everything I learned allows me to be in the right place at the right time to make a positive difference on this thing that the world
cares about so much right now. (pensive music) – Come back next time for
another episode of "Hard Reset." Subscribe to Freethink to
watch our other original series and documentaries about technology and people that are changing our world. (dramatic music).

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