this post was submitted on 30 Nov 2025
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Science Memes

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[–] MisterFrog@lemmy.world 15 points 1 day ago
[–] HenriVolney@sh.itjust.works 269 points 2 days ago (16 children)

Every damn power plant is a glorified steam engine

[–] hades@feddit.uk 160 points 2 days ago (25 children)

Except solar. And wind. And hydro.

[–] OrganicMustard@lemmy.world 147 points 2 days ago (6 children)

Some solar is also boiling water

[–] psud@aussie.zone 1 points 19 hours ago

My local solar steam generator was shut down years ago as it was no longer worth testing direct reflector material anymore — even if they had gotten perfect reflectivity they couldn't compete with photovoltaics anymore

[–] voracitude@lemmy.world 51 points 2 days ago (5 children)

And some of it is boiling salt!

Which then boils water, of course.

But some of it is electrons from photonic impact, no water involved! In the process of energy generation anyway. Statistically and perhaps somewhat ironically, the electrons from that photonic impact may well be used to boil water regardless... Humans just fucking love boiling water.

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[–] xx3rawr@sh.itjust.works 38 points 2 days ago (4 children)

Expect for solar, it's all just flowy stuff through spinny stuff: wind, water, steam. GRAAAAAAAAAA

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[–] magic_lobster_party@fedia.io 84 points 2 days ago (3 children)

We’re living in a steampunk world after all

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[–] Bluewing@lemmy.world 35 points 2 days ago (6 children)

Reading the comments, it would seem most everyone here thinks that the usefulness of the steam is done when it gets used to turn a turbine at high pressure.

The steam can be used for much more than once. In the 1800's and early 1900s when steam ran trains and ships, they built double and triple expansion engines that took the energy of the steam two and three times before it was done. It doesn't need to be one and done. And when the energy is done being harvested for power generation, it can used for other things. Engineers today aren't dumber than the ones in the 1800s.

I can remember a small rural Minnesota town that had their own coal fired electric plant. (Built back before the REA was a thing). They took the left over steam from power generation and then piped it to around 200 homes in the town and heated them with the leftover steam. While a bit costly to install, it was dirt cheap to run. Those homes lost all that when the power plant was shut down and they had to switch to either natural gas, fuel oil, LP, or electricity.

So don't get hung up on just the power generation. Think what could be beyond that point.

[–] Hotzilla@sopuli.xyz 2 points 1 day ago* (last edited 1 day ago)

All large cities in Finland are heated by combined heat and power (CHP) power plants.

These power plants first make super heated steam (like 800°C, 1500°F), runs that through turbine to make electricity, then send the cooled down water (80-150°C, 170°F-300°F) to all homes through district heating grid.

From that water the home is heated and hot water is used.

Now that we have the district heating network, when electricity is cheap, we can also use electricity to boil the water and send it through the grid. Water is also easy to use as storage, if the need of consumption requires buffering.

Smaller cities use just heat plants, were there is no turbine for electricity generation, just the heating of water to district heating grid.

Most plants use biomass as power source in the power plants, historically they were coal, but it has been now almost completely phased out.

[–] homura1650@lemmy.world 2 points 1 day ago* (last edited 22 hours ago)

Municipal steam networks are still operating today.

For new infrastructure, Electricity is just so good-enough, that it is hard to justify building out partial alternatives like steam pipes. But where we already have them, they are still useful.

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

"Dyson Spheres? Look, playing with sunlight and mirrors was a fun side project, but you want to know a much more advanced method of generating power?"

"Please dont...."

"Thats right! By hurling entire water worlds into a star, we then capture the released steam which powers our gravitationally locked dynamo network."

[–] brown567@sh.itjust.works 8 points 2 days ago (1 children)

Throwing water into a star wouldn't get you steam, it'd just fuel the star XD

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[–] kerrigan778@lemmy.blahaj.zone 5 points 1 day ago (1 children)

There are a million efficient ways to make heat and tons of new development to be made in making heat in new ways. There is relatively very little development in turning heat into kinetic energy and then electricity when size and weight are no object. The combined cycle turbine is incredibly efficient and is likely to continue to be ubiquitous in power generation for some time.

In addition, with our current grid (and many of the things that run on it), frequency is incredibly important. Having giant, heavy, spinny things with lots of inertia does wonders for naturally maintaining a very constant grid frequency as loads fluctuate.

[–] MiddleAgesModem@lemmy.world 26 points 2 days ago

It's always been about finding new ways to spin a turbine

[–] Devial@discuss.online 15 points 2 days ago

Most common fission reactions today release most of their energy in the form of neutrons. The only way to extract energy from neutrons is heat. But there are fission reactions which release a large portion of their energy in the form protons. And since protons are charged, their energy can be electromagnetically converted directly into electricity, with no need for intermediate process steps.

There's already at least one company building prototypes like this, Helion, using D+He3 fusion, rather than the more common D+T fusion in other reactortypes like Tokamaks.

Real engineering has a video on Helion: https://www.youtube.com/watch?v=_bDXXWQxK38

[–] Angelevo@feddit.nl 31 points 2 days ago (3 children)
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[–] ininewcrow@lemmy.ca 118 points 2 days ago (14 children)

Why don't we just pipe our water all the way out to the sun and pipe the steam back to earth.

[–] TachyonTele@piefed.social 129 points 2 days ago (2 children)

That's silly.
Clouds would knock the pipes down.

[–] Wilco@lemmy.zip 36 points 2 days ago (10 children)

I was thinking you could put giant fans on it to blow the clouds away, but then the moon would also knock it down once you got up that high.

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[–] socsa@piefed.social 125 points 2 days ago (15 children)

One of the fusion startups says they can use the plasma B field directly. Basically making the plasma the rotor in an electric generator to induce current in a wire.

[–] pennomi@lemmy.world 65 points 2 days ago (1 children)

I really like this concept, wonder how viable it really is though.

[–] theneverfox@pawb.social 49 points 2 days ago (4 children)

It seems promising, they're acting like they're close. They've been promising concrete deliverables, I think they're supposed to have a working model that can actually capture the energy next year

You never know, but they're called Triton if you want to check them out. They don't share progress often, but when they do it seems pretty candid about their progress

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[–] gandalf_der_12te@discuss.tchncs.de 25 points 2 days ago* (last edited 2 days ago) (1 children)

There's only 3 major ways to transform different forms of energy into electricity, which are:

  • solar panels (light -> electricity)
  • mechanical engines/generators (mechanical movement -> electricity)
  • electrochemical battery (chemical dipole -> electricity)

there's a whole lot more, such as thermoelectric generator and piezoelectricity but these are the three significant ones.

note that i distinguish these categories by their core essence, such as whether they're using changes in magnetic flux (like a mechanical generator) or transferring 1 photon on each electron (like solar panels), instead of looking at what source type of energy they transform.

because there's many ways to transform e.g. light energy into electricity. you could also heat water with the sunlight and then drive a steam engine with it. but that's not what i care about. i care about the fundamental connection between different types of energy, and how they can be directly transformed to one another.

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[–] gmtom@lemmy.world 19 points 2 days ago

There are actually versions of fusion reactors that use the magnetic fields generated by the plasma in order to make electricity directly.

[–] Trainguyrom@reddthat.com 58 points 2 days ago (2 children)

Reminds me of one of my favorite photos, a steam engine being delivered by steam engine!

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[–] Meron35@lemmy.world 33 points 2 days ago (2 children)

Low key this is a great way to convince people to switch away from fossil fuels.

Most people seemingly don't know that coal/gas stations work by essentially boiling water. Most are horrified at how trashy and underdeveloped the concept is compared to high tech alternatives like solar, wind, or hydro.

[–] Geobloke@aussie.zone 24 points 2 days ago (12 children)

Well, hydro is just spinning water again, wind is spinning air. Solar is stealing electrons from the sun (i think?) So that's cool

[–] tja@sh.itjust.works 23 points 2 days ago (1 children)

Well, the sun is sending them to us, so it's not really stealing!

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[–] mojofrododojo@lemmy.world 21 points 2 days ago

stealing

reappropriating :D

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[–] MonkderVierte@lemmy.zip 19 points 2 days ago

Wasn't there one concept too with catching neutrons directly to ...generate heat, ah right.

[–] SomeAmateur@sh.itjust.works 52 points 2 days ago (17 children)

I wonder if nuclear would get more traction If it was pitched as enhanced steam power instead

[–] birdwing@lemmy.blahaj.zone 76 points 2 days ago* (last edited 1 day ago) (6 children)

"It's a blockchain of an highly enhanced hydrogen process. Thanks to its AI quantum mechanism it manages to increase the energy output by a ton through its cloud."

Just tell that to investors and they'll gobble it up. /s

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[–] NauticalNoodle@lemmy.ml 23 points 2 days ago (4 children)

use cherenkov radiation to power photovoltaic array.

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[–] m3t00@lemmy.world 8 points 2 days ago (10 children)
[–] Tattorack@lemmy.world 7 points 2 days ago (4 children)

Yeah; somehow converting the plasma directly into electricity at a 1:1 ratio using... Uh... Dilithium or something.

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