this post was submitted on 17 Dec 2025
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Lemmy Shitpost

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[–] Aceticon@lemmy.dbzer0.com 47 points 2 days ago* (last edited 2 days ago) (4 children)

There is actually a Solar Power Generation system were a solar collector uses sunlight to melt salt which then circulates through pipes to a place were it heats up water to boiling and that steam then goes through a turbine thus generating electricity.

However to reach those temperatures a simple panel isn't enough so what you have is a ton of mirrors over a large area all focusing the sunlight on a central tower were the salt-melting happens.

Here is an example.

By the way, this stuff actually has benefits over solar such as the ability to generate power at night (basically you don't extract all the heat from the molten salt during the day and just keep using it to boil water to feed the steam turbine during the night), plus it's a bit more efficient than solar panels and like solar panels it's also improving, throught things like using different salts.

[–] sorrybookbroke@sh.itjust.works 30 points 2 days ago (3 children)

You can also choose to divert power to either new Vegas, the people, or a giant space laser which is really quite nice compared to traditional methods

[–] bananabenana@lemmy.world 2 points 18 hours ago

You activated ARCHIMEDES?! What the hell are you thinking?!

[–] halvar@lemy.lol 6 points 1 day ago

you can't just shoot a hole into the surface of mars!

[–] Aceticon@lemmy.dbzer0.com 3 points 2 days ago

It's pretty much a required upgrade to be able to protect yourself from dropped or balistic nukes.

Also Helios One from Fallout: New Vegas is based off of those, though I don't think we've figured out how to make an Archimedes mirror out of one and a reflection satellite yet.

[–] ryathal@sh.itjust.works 4 points 1 day ago (1 children)

Solar collection like this can also explode birds if they fly through the wrong area as it's essentially like a magnifying glass and ants.

[–] BoxOfFeet@lemmy.world 2 points 12 hours ago

I'm already sold, you don't need to sweeten the deal anymore.

[–] krooklochurm@lemmy.ca 4 points 2 days ago (1 children)

How hot does heat need to be to salt melting?

[–] Aceticon@lemmy.dbzer0.com 10 points 2 days ago* (last edited 1 day ago) (1 children)

Depends on the salt used.

If you check here on table 5 you'll see that common table salt (NaCl) melts at 801º C.

As for what's used, in Chapter 2 of that paper they say "Molten salts consist of alkali metal or alkali metal halides and oxygen-containing salts", so it's not actually table salt that's used in Generation 2 of those kind of power generators.

[–] krooklochurm@lemmy.ca 4 points 1 day ago

Thanks!

Do you know of the melting temperatures of any other substance you think I may be interested in?

[–] myotheraccount@lemmy.world 31 points 2 days ago

I know this is supposed to be a joke, but it's important to understand how it really works:

  • particles from the sun hit the solar panel
  • the panel accelerates those particles, which creates fissile material
  • the fissile material is the used in a traditional nuclear reactor
  • the nuclear reaction finally heats water
[–] Gladaed@feddit.org 98 points 2 days ago (1 children)

(these are solar thermic power plants, their panels are black and usually assisted by mirrors leading to a similar look)

[–] SaveTheTuaHawk@lemmy.ca 89 points 2 days ago (3 children)

Solar thermal concentrators, they get so hot they have to use liquid metal.

[–] Gladaed@feddit.org 38 points 2 days ago (2 children)

Parabolic plants also exist w/o a tower of sauron.

[–] ICastFist@programming.dev 46 points 2 days ago

But half the fun is having a gleaming tower of doom!

[–] bizzle@lemmy.world 25 points 2 days ago (1 children)

Why would anyone want that when the alternative is a tower of sauron

[–] psoul@lemmy.world 3 points 1 day ago (1 children)

All I want for Christmas is new petty gods with towers to worship.

[–] Trainguyrom@reddthat.com 1 points 1 day ago

Real talk, there are not enough minor gods in the modern world. GIVE ME DICKOCALYPSE DAMMIT! (nsfw link)

They also function as adequate bird-zappers from what I've heard.

[–] nevemsenki@lemmy.world 7 points 2 days ago (4 children)

Didn't this exact plant go bankrupt due to solar panels being so much more efficient?

[–] tryitout 17 points 2 days ago (2 children)

If you mean the Vegas one, then yes it's closing, don't know if it's gone bankrupt exactly.

https://en.wikipedia.org/wiki/Ivanpah_Solar_Power_Facility

The facility, though cost effective at the time it was planned (2009), is now twice as expensive to run as solar photovoltaic technology, which has decreased in price much more rapidly than was expected in the 15 years since Ivanpah's construction began.

[–] Aceticon@lemmy.dbzer0.com 4 points 2 days ago

I think that's what they called a First Generation generator.

The ones in use now will actually use sunlight to melt salt (than then is used to generate steam) rather than directly generating the steam which has way more capacity to store heat, so they have a solar conversion efficiency of between 38% and 44%, plus the molten salt can keep on being used to generate steam during the night until it cools down enough.

[–] EmpathicVagrant@lemmy.world 2 points 2 days ago* (last edited 2 days ago) (1 children)

Well that makes no sense, I need it to keep from being shut down to get Euclid's C-Finder to work.

[–] nevemsenki@lemmy.world 1 points 1 day ago

No worry. Just throw a bug report at Bethesda, wait a few years for them to do diddly squat, bitch on all forums and then wait until a modder fixes it.

[–] Gladaed@feddit.org 4 points 2 days ago

No. The issue is solar panels getting much cheaper. The advantage of solar thermic plants are low cost of panels in exchange for more difficulty to maintain. This stops making sense when solar panels become dirt cheap and they cannot shift their power generation outside of peak solar(easily possible with molten salt tanks for the night, but not free)

[–] brucethemoose@lemmy.world 11 points 2 days ago* (last edited 2 days ago) (2 children)

It would make sense.

Thermal concentrator cost is basically fixed: mirrors of a specific quality, tracking mounts, an eye of sauron cooling loop. That tech doesn't change much. Same with parabolic pipe plants.

But the bulk of photovoltaic installation cost is the panels. And those get exponentially cheaper.

[–] BartyDeCanter@lemmy.sdf.org 8 points 2 days ago (2 children)

They’ve gotten cheap, in fact, that the panels are sometimes less expensive than the labor and mounting hardware.

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[–] Aceticon@lemmy.dbzer0.com 2 points 2 days ago* (last edited 2 days ago) (1 children)

Actually it does change, from what I read mainly in terms of what substance is used to capture the heat of the sunlight, which in turn has other implications downstream: for example, if you melt salt and the molten salt is used to generate steam (so a generation 2 system), rather than directly heating water with sunlight to generate the steam (generation 1), not only does the efficiency go up but you can keep on generating power during the night as long as there's enough heat left in the salt, and whilst the basic principle is the same a lot of the engineering of the system changes because you're circulating melted salt rather than steam, you want to store some of the heated salte for the nighttime and you need to concentrate more sunlight to reach higher temperatures so the area of mirrors is larger.

Here is a paper I found about this stuff.

[–] brucethemoose@lemmy.world 1 points 1 day ago* (last edited 1 day ago)

That’s actually very cool. There’s a lot of talk of molten salt energy storage anyway, and this just integrates it.

Maybe it could be built closer to other renewables or cities, and use a big vat to store heat from other power sources, when needed.


…Still, though.

AFAIK, the (silver?) mirrors on mounted servos that have to be kept clean are a pretty significant fixed cost.

[–] SaveTheTuaHawk@lemmy.ca 3 points 2 days ago

There are hundreds of these.

[–] kameecoding@lemmy.world 23 points 2 days ago (5 children)

Where is the shitpost, solar panels do work by heating up water, unlike photovoltaics.

Solar panels are good to get a baseline amount of heated water for your home.

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[–] Korhaka@sopuli.xyz 9 points 1 day ago

CCGT - A gas powered jet engine but instead of spinning to produce thrust it spins to produce electricity with a turbine. Then the hot exhaust is used to boil water to make steam to spin a turbine.

[–] HollowNaught@lemmy.world 33 points 2 days ago

Where sadam Hussein

[–] fenrasulfr@lemmy.world 6 points 1 day ago* (last edited 1 day ago) (1 children)

Appart from using solar power to melt salt as a energy storage solution, you also have water cooled solar panels that store that heat as warm water.

[–] Trainguyrom@reddthat.com 1 points 1 day ago

These are cool because they add efficiency by both preheating your water for your water heater and help cool the photovoltaic cells so they can run more efficiently too. Downside of course is that there's now a bunch of water pipes on your roof too

[–] shittydwarf@piefed.social 27 points 2 days ago (1 children)

It's always a steam turbine?
🌎🧑‍🚀🔫🧑‍🚀

Wait till this dude learns about mitochondria

[–] l_isqof@lemmy.world 5 points 2 days ago (1 children)

I think you forgot the oil powered generator under the boiling water.

[–] ICastFist@programming.dev 2 points 1 day ago

It's coal powered, so it can double as a bbq grill

[–] Doorbook@lemmy.world 3 points 1 day ago

Can you connect that to ai data center that can generate an image of Trump with Clinton?

[–] Triumph@fedia.io 10 points 2 days ago

If only we could figure out a way to harness the power of the Giant Fan on the other side of the sun.

[–] HikingVet@lemmy.ca 7 points 2 days ago (1 children)

Lotta loss in that system.

[–] ICastFist@programming.dev 19 points 2 days ago

Should've put the water tank on the left to avoid loss

[–] hperrin@lemmy.ca 5 points 2 days ago (3 children)

It seems like we could make this a lot more efficient by using pistons and having the sunlight push the pistons, turning a generator.

[–] SaveTheTuaHawk@lemmy.ca 14 points 2 days ago (3 children)

big solar has kept the truth about free power generation hidden for years.

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[–] brucethemoose@lemmy.world 4 points 2 days ago

Just like modded Minecraft.

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