649
Turbines are our friends (media.piefed.social)
top 50 comments
sorted by: hot top controversial new old
[-] queerlilhayseed@piefed.blahaj.zone 162 points 4 days ago

It turns out spinning things is really useful and boiling fluids is a convenient way to spin things.

It's still funny that so much boils down to steampunk with a fake mustache.

[-] rants_unnecessarily@piefed.social 22 points 4 days ago* (last edited 13 hours ago)

Wait, it's all steampunk?

Always has been.

[-] f314@lemmy.world 16 points 3 days ago

boils down to

I see what you did there!

[-] brisk@aussie.zone 9 points 3 days ago

Not enough brass, though

[-] fluffykittycat@slrpnk.net 46 points 4 days ago

"I'll try spinning! That's a good trick!"

Wisdom from a Jedi born to bring balance to things.

load more comments (2 replies)
load more comments (1 replies)
[-] megopie@lemmy.blahaj.zone 41 points 3 days ago

I really like the concentrated solar systems that use molten salt, where rather than heating water directly, molten salt is heated and stored In large insulated tanks and tapped off to a heat exchanger to run the turbines, thus allowing power generation to match demand and continue at a constant rate even when light level very (such as at night).

One interesting idea is to use a concentrated solar system to run an Einstein–Szilard refrigerator, or some other absorption refrigerator cycle.

[-] rothaine@lemmy.zip 6 points 3 days ago

What are the tanks made of? "Molten salt" sounds like it would fuck up most materials

[-] megopie@lemmy.blahaj.zone 8 points 3 days ago

Various common steels with a bunch of insulation around it usually, sometimes with a thin coating. The potassium/sodium/calcium nitrate mixes that are used with concentrated solar systems operating in range between 200 C and 600 C. So like, yah you don’t want to touch it, but it’s not gonna do much to steel. It can be somewhat corrosive, but, this is fairly easily mitigated by design.

Molten salt for heat transfer and thermal storage is a pretty mature technology that goes way back before we started using it in concentrated solar systems.

[-] how_we_burned@lemmy.zip 3 points 3 days ago

Molten salt for heat transfer and thermal storage is a pretty mature technology that goes way back before we started using it in concentrated solar systems.

Isn't the core problem with anything that uses molten salt is that when the heat ~~sauce~~ source (thanks autocorrect, really, the context in that sentence means you should suggest "sauce"?) fails you just end up with a huge lump of solid salts that clog every part of your system?

The Russian Alfa class had a similar problem due their use of lead-bismuth heated into a liquid.

When they lost power for whatever they'd essentially end up being written off as reheating them was incredibly difficult and very tricky.

load more comments (1 replies)
load more comments (1 replies)
[-] Alcoholicorn@mander.xyz 65 points 4 days ago

Solar thermal is kinda obsolete I thought, now China is churning out PVs for pennies.

[-] freebee@sh.itjust.works 21 points 3 days ago

But t solar boiler can still be useful in some cases. Where heated water in "solar" on the roof is used immediately for shower etc.

[-] Redjard@reddthat.com 11 points 3 days ago

Modern solar into a modern heat pump is gonna be more efficient than heating water. It's also more versatile and convenient, cause it maintains that efficiency when you pull power from the grid at night. And of course lets you use the power for other purposes.

load more comments (2 replies)
[-] megopie@lemmy.blahaj.zone 13 points 3 days ago

Solar thermal has some distinct advantages when you start talking about really big instillations. Especially when considering power storage, molten salt systems can store heat and allow the generators to keep working even at night. Much cheaper than batteries at very large scales.

Thermal solar systems are generally very efficient when the goal is heating something, not just generating power. So say, you want to run an ammonia plant without burning natural gas, or if you want to melt down metals for recycling. There are so many industrial applications where it’s a better way of doing it than using an electric heating element.

[-] oneser@lemmy.zip 14 points 4 days ago* (last edited 4 days ago)

I mean it seems the more complex solution in deployment for sure, but its design could still have use in low heat industrial uses (sub 250°C, e.g. food prep, textile, sanitation etc.) where it is used heat -> heat rather than heat -> electricity -> heat. Maybe these replace thermal collectors eventually.

But that is not the point of this meme at all, just my thoughts.

[-] rumschlumpel@feddit.org 8 points 3 days ago

IDK, heat pumps are basically multiplying the electricity they use.

load more comments (5 replies)
load more comments (1 replies)
[-] johnefrancis@lemmy.ca 22 points 3 days ago

why are there 2 people in suits?

[-] WhiskyTangoFoxtrot@lemmy.world 12 points 3 days ago

The third guy was busy that day.

[-] Noodle07@lemmy.world 14 points 3 days ago

Mandatory clothing in our utopian solarpunk society of course

[-] NutWrench@lemmy.world 10 points 3 days ago

Human sacrifices to the Turbine Gods.

load more comments (1 replies)
[-] Soup@lemmy.world 9 points 3 days ago

Stock assets to show scale, probably.

[-] HeyThisIsntTheYMCA@lemmy.world 6 points 3 days ago* (last edited 3 days ago)

gotta dress up to visit the machine god

don't wanna insult the machine god with my shabby shoes. wear my fancy shoes.

load more comments (1 replies)
[-] OldChicoAle@lemmy.world 5 points 3 days ago

Someone needs to take credit for the work of engineers and manual laborers.

[-] m3t00@lemmy.world 3 points 3 days ago
[-] johnefrancis@lemmy.ca 2 points 2 days ago

even the Mormons are solar now?

load more comments (1 replies)
[-] oppy1984@lemdro.id 41 points 4 days ago

It all boils down to steam....

[-] humanspiral@lemmy.ca 21 points 3 days ago

This is old technology that is more expensive/complicated/maintenance-ey than PV. An economic falacy is that if you have oil/fossils you should use that instead of solar. It's always better to use cheapest energy. Export the fossils, import solar. It is more jobs to have solar as well, and in fact most of the deployment costs are local work/materials (wiring/support structures).

load more comments (3 replies)
[-] Bombastic@sopuli.xyz 22 points 3 days ago

They can't keep getting away with this!!

[-] BeatTakeshi@lemmy.world 10 points 3 days ago
[-] CapuccinoCoretto@lemmy.world 23 points 4 days ago

Punches below the belt. Right in the photovoltaics.

[-] fubarx@lemmy.world 18 points 4 days ago

Everybody with a college course in Thermodynamics.

[-] village604@adultswim.fan 18 points 4 days ago

I wonder if we could kill 2 birds with one stone. Have parabolic solar panels that reflect unabsorbed light to boil water.

[-] OwOarchist@pawb.social 14 points 4 days ago

It would be a less efficient boiler (because the 'mirrors' would be much less reflective), and much more expensive (because solar panels -- especially custom-made curved ones -- are much more expensive than mirrors).

Overall, I suppose maybe you could come out ahead if you used very efficient solar panels for it, and that would let you generate slightly more watts per surface area used...

But we really don't need to optimize for surface area in 99% of cases. Almost everywhere solar power is used, space to install panels is abundant, and it would be much cheaper and more effective to just put one or the other of these solar collection methods over a slightly wider area if you want increased production. (And even then, most of the cases where production-per-surface-area is very important are on solar-powered vehicles, and these parabolic sun-tracking mirrors are impractical for use on a moving vehicle.)

load more comments (4 replies)
[-] nutsack@lemmy.dbzer0.com 6 points 3 days ago
[-] pedz@lemmy.ca 7 points 3 days ago

I know this is a meme community but I was curious about this. It seems some birds do get burned, but not blasted. It varies a lot depending on the installation and it can also be mitigated. Also, the amount of birds dying from this is significantly lower than just the amount of birds hitting windows. For the benefit of other curious people, I'll try to condense the relevant information from wikipedia and the sources.

In more general terms, a 2016 preliminary study assessed that the annual bird mortality per MW of installed power was similar between U.S. concentrated solar power plants and wind power plants, and higher for fossil fuel power plants.

How it was calculated for fossil fuel

Sovacool estimated avian mortality from fossil fuel power plants across the United States as a result of collision with infrastructure, electrocutions, pollution and contamination, and climate change. In addition, Sovacool estimated climate change-induced avian mortality (in terms of habitat loss and changes in migration) predicted to be the result of fossil fuel power plant operations.

A preliminary assessment of avian mortality at utility-scale solar energy facilities in the United States: https://www.sciencedirect.com/science/article/pii/S0960148116301422?via=ihub

Review of Avian Mortality Studies at Concentrating Solar Power Plants: https://www.osti.gov/servlets/purl/1364837

[-] EmptyAsparagus@piefed.social 9 points 3 days ago

guys its literally in fallout, so its canon.

[-] OwOarchist@pawb.social 14 points 4 days ago

At least hydro and wind power are still safe from the boiling water...

load more comments (3 replies)
[-] A_Chilean_Cyborg@feddit.cl 9 points 3 days ago

Yes, Everything, always turns back to mechanical enginnering.

[-] Quill7513@slrpnk.net 7 points 3 days ago

carcinization but for steam engines instead of crabs

[-] panda_abyss@lemmy.ca 11 points 4 days ago

With all the solar mirrors, won't we overhear the sun shooting all that light back?

[-] chromeleon@lemmy.world 13 points 4 days ago

there's a silencer on its gun, so we probably won't hear much.

load more comments
view more: next ›
this post was submitted on 31 Mar 2026
649 points (99.4% liked)

Science Memes

19729 readers
2501 users here now

Welcome to c/science_memes @ Mander.xyz!

A place for majestic STEMLORD peacocking, as well as memes about the realities of working in a lab.



Rules

  1. Don't throw mud. Behave like an intellectual and remember the human.
  2. Keep it rooted (on topic).
  3. No spam.
  4. Infographics welcome, get schooled.

This is a science community. We use the Dawkins definition of meme.



Research Committee

Other Mander Communities

Science and Research

Biology and Life Sciences

Physical Sciences

Humanities and Social Sciences

Practical and Applied Sciences

Memes

Miscellaneous

founded 3 years ago
MODERATORS