JacobCoffinWrites

joined 1 year ago
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[–] JacobCoffinWrites 6 points 1 month ago (3 children)

They've been doing a bunch of cool solarpunk art for a bit, and they've started releasing it CC-BY (I think) including on wikimedia commons, which is great because otherwise the solarpunk category over there was mostly a bunch of AI art and proposed flags. (I'd added some of my photobashes so it wasn't just AI representing the genre, but I'm very glad to have them contributing art with a lot of intent behind it.) I think a lot of the planning for their scenes comes from the solarpunk prompts podcast these days.

[–] JacobCoffinWrites 2 points 1 month ago (1 children)

Thank you!

I'm hoping it'll make my notes useful to others, and I'm also hoping to start a culture of building resources in the solarpunk art scene. Like, if there's something someone wants to see in solarpunk art, and they feel they can't write or draw well enough to make it themselves, then make it easy for writers and artists to make that thing by making the info easier to find. Write up a list of details, things to avoid and reasons why, gather visual examples. I don't know if it'll work but I'm hoping it sets a useful example.

I'm also hoping this pushes back on something that's been bugging me - I think because solarpunk is so new, there's a bunch of people trying to steer its long-term course from the sidelines just by complaining at the people who make anything. (I'm mostly thinking of the subreddit here). And that can get pretty frustrating.

I think it's also something that could help with building solarpunk media that reflects the movement half of the scene. (I think there's a bit of a gap right now between the aesthetic side of solarpunk and the nuts-and-bolts permiculture social movement thing trying to carry it out). I think especially if we want artists who've just gotten into solarpunk to get the details right, then we need to make the cool ideas we want conveyed in the art easily accessible to them.

[–] JacobCoffinWrites 4 points 1 month ago (4 children)

I really enjoy reading about the investigations that follow any big crypto heist, where they track the stolen money through various exchanges etc. The Swindled podcast just did one about a pretty poor attempt to launder crypto (see Razzlekhan) and Darknet diaries did one on the much more competent (suspected North Korean) heist of eth from Axie Infinity and their various laundering efforts including through Tornado cash. It's surprisingly transparent in a lot of ways. It seems like stealing the money is often the comparatively easy part, and getting their huge sums out of crypto and into something they can use (while thousands watch the money like hawks) is much harder.

[–] JacobCoffinWrites 3 points 1 month ago* (last edited 1 month ago) (3 children)

I haven't done much on the campaign - my big project this month was researching and making the photobash of a more flood-compatible city.

I've also been reading about modern sailing ships, including having a great conversation over on the naval architecture subreddit. My goal is to both make a new photobash of a cargo sail ship at sea, but also to write up what I've learned to consolidate the info and links for other solarpunk writers/artists. That's part of a new thing I want to do - trying to make resources that make it easier to make solarpunk stuff.

Edit: I did talk with an expert I know about testing sites for contaninants and got a list of tools and procedures they'd use in real life, so I now need to figure out how to abstract it in an interesting way (and that reflects the goals of the players in the game).

[–] JacobCoffinWrites 2 points 1 month ago

There's conversion to EV, conversion to run on woodgas or possibly conversion to an alcohol engine - I think it depends on what's readily available locally in parts and energy sources. If you have a sawmill or work construction or deconstruction and can be burning wood scraps for fuel that already exist, gasification might make sense. If you live in a place with lots of sugarcane or another source of alcohol, that might work. Ideally your energy source is a waste product of something that's already there, and your use doesn't incentivize more deforestation etc (that's the hard part).

I also started a list of car parts that can be used/repurposed for other tasks, mostly based on stuff I'd seen on permaculture and tool forums: https://jacobcoffinwrites.wordpress.com/2024/09/04/using-every-part-of-the-car-a-resource-for-solarpunk-writers-and-artists/ it's intended more for writers/artists, but some of the links might be interesting.

[–] JacobCoffinWrites 1 points 1 month ago

Just to add, the way I pictured this working was to set up a basic smithee, probably a three sided shed so I'd have a dark place to work (helps to gauge the temp of the metal by color). I'd get some of those gas welder's goggles with the flip up flip down lens (or use my electronic welder's hood) so I could safely look at the work in the firepot (solarpot?) then take it inside to quickly work on it. I'd stow the forge inside the smithee (or in an attached lean-to) when not using it. One feature that might be good would be a way to cover the lens and unclip it from the forge so it can be stored in a box or wrapped up, to reduce the risks of it starting a fire.

[–] JacobCoffinWrites 1 points 1 month ago (1 children)

Sure! Generally they're just an old coffee can with a thick layer of plaster of Paris and sand or firebox cement on the inside. They cement in some torch parts so they can attach a can from a burnzomatic torch and blow fire into the small, contained space from the side while having a hole on the front (usually with some loose firebrick for a door) to insert the work.

https://makezine.com/article/workshop/making-your-own-tin-can-forge/

https://m.youtube.com/watch?v=xv9nnEhgfuY

I don't know that the design itself is actually applicable here, just that they're a good demonstration that even with a small forge, you can do some pretty cool blacksmithing.

In practice I think a solar forge would have to be open from the top, and couldn't really benefit from the tight space confining the heat, so it'd probably be closer to using a portable ferrier's anvil like you might see reenactors use at the fair, or something like this:

Though it'd look more like that artist's smelting rig with the big lens and all.

Thanks! I'm really excited to see what you come up with

[–] JacobCoffinWrites 1 points 1 month ago

This is great!

[–] JacobCoffinWrites 2 points 1 month ago (3 children)

That's great! I don't have specific dimensions in mind (only because I haven't sourced a lens yet). I'm not sure about the beam width. I think no matter what, it'll be a narrower heat than you normally get with a coal fire or propane forge, so the blacksmith would probably have to adjust beam and shift the position of the piece to distribute the heat. But people make all kinds of things using little coffee can forges so if it allows for even that scale of project it'd be very useful.

It might not be a drop-in replacement for a traditional forge, but it could be a really cool way to preserve a lot of the practice without burning coal or gas. Let me know if I can help at all!

[–] JacobCoffinWrites 2 points 1 month ago* (last edited 1 month ago) (5 children)

So I'm not sure this would qualify, it may be too simple. I'd been thinking about trying to build a solar forge (I got to learn forging from a really good blacksmith who worked with coal for a couple years, though I am very much an amateur). I've seen videos of people using old fresnel lenses from rear projection TVs to burn through skillsaw blades and if you can melt steel, you can certainly forge it. It might just be slow, or too focused on one spot, requiring some movement to distribute the heat, something I'd have to mess with. It'd also be a bit of a safety hazard overall, but at least it'd be outside on a paved driveway instead of of inside a shed like my old coal forge.

I was picturing something similar to this smelter but with a reused TV lens, and a fire pot where his crucible is. The mechanical parts would be for rotating it to keep the sun shining through the lens, and possibly for adjusting the focus. Stability and safety would be a big consideration, don't want the wind blowing it around too much.

Again, not sure if it's what you're looking for, but I'd like you to get some usable answers here. Best of luck with your project, thank you for reaching out to involve the community!

[–] JacobCoffinWrites 3 points 1 month ago

Thanks so much, that's great to hear! And thanks for all your input! Sorry the text is small, I work on a knockoff wacom-style tablet so I get used to looking at it zoomed in and from pretty close to the screen.

Feel free to post it anywhere, I'm always delighted to find out when these images travel around a bit on their own.

23
submitted 6 months ago* (last edited 6 months ago) by JacobCoffinWrites to c/utilitycycling
 

I've been riding the same Gary Fisher Hoo Koo E Koo Mountain Bike since my uncle found it in a sandpit and gave it to me to ride while away on my first internship. It was in somewhat rough shape back then, and it's kind of the bicycle of Thesius at this point as parts failed and I found ways to replace them.

I was replacing the front tire and realized I'd like to make this thing into a cargo bike (I currently use it to scout for furniture to restore on trash days, but usually have to ride home and return on foot to grab anything I find, plus I could get groceries). I'm not sure what level of standardization this bike follows and I have no familiarity with cargo bike parts, but I was thinking I'd like to add a Rear Pannier Carrier Cargo Rack and perhaps a large basket on top of that - in fact, I happen to have this homemade welded steel basket I pulled out of a dumpster a couple years ago:

It's 23" long, 12" tall, and 16" wide. I could weld on whatever mounting hardware it needs.

So basically I'm looking for advice on layout and things to add, specific parts if you have any recommendations, is that basket a horrible idea, etc. What traits make for a useful cargo bike, what would work well with this old mountain bike? And thank you for any ideas!!

123
 

This is one I’ve had on my list for months now, and I finally decided to just go ahead and make it. Back when I was researching solar cookers, solar concentrator, and solar furnaces, I ran into a few really interesting ideas around fresnel lenses. Look them up on youtube and you can find all kinds videos of people melting glass or burning skillsaw blades in half, but the ones that kind of showed me how useful a really-concentrated point of heat could be was this 3D printer for sintering sand into glass objects and this solar rig for smelting zinc or aluminum. Both used fresnel lenses, but were limited by the size of their portable builds.

So here’s my take on something bigger and more permanent, though hopefully still flexible enough to do multiple jobs using concentrated sunlight. The building’s tower houses an observatory-style dome with an irising shutter around a very large fresnel lens. This lens is meant to gather light, but deliberately doesn’t focus it too much, just directs it to another lens, which aims the light straight down. There, on a motorized rig which allows for some adjustment up and down, is the third lens which actually brings it to a searing focal point.

With that focal point reliable and known, the people at the workshop could move several different tools underneath it as necessary, from a crucible for smelting, to a firepot for solar forging, perhaps a glassblowing oven, a 3D sinterer, or the large CNC plasma cutter-style rig shown in the scene.

A set of computers would be set up with light sensors and control over the rotation of the dome, to allow it to track the sun, and the width of the aperture in the shutters, to allow it to regulate the amount of light. The upper limit on the light would be based on how bright the day is, but if they need anything less than full sun, then the opening and closing of the shutters should help with providing consistency. If it starts around half open in full sun and a cloud moves in front of the dome, it might open all the way, then close partially as the cloud leaves. With many minute adjustments, the overall amount of light could remain very consistent down on the ground.

As for the level of focus, I suspect the kerf while cutting would almost definitely be wider than with a modern plasma cutter, but like I said before, people have cut through skillsaw blades with just a lens from a rear-projection TV. So it's possible a larger lens could concentrate even more heat, allowing it to burn through much faster, with less damage to the surrounding material. The tightness of the point would mostly come down to the quality of the lens, as far as I know.

I’ve tried to include a number of controls, caution markings, and red emergency stop buttons, but the one thing I really don’t like about the design as drawn is that it’s not obviously fail-safe. I think ideally there’d be some kind of hanging weight or other mechanism so that when power is lost (not just to the building, as that probably happens fairly often on a less-reliable grid, but to the system’s control unit) the shutters or another light-blocking mechanism slams into place.

Other notes about the scene, I’ve tried to include a diversity of ways to use the sun, the photovoltaic panels for powering the electronics and perhaps some of the tools, a set of fiberoptic solar daylighting systems, which track the sun and pipe light down to the shop floor, along with the simplest version, large windows. This emphasis on daylight should help avoid the risk of electric lights strobing in sync with moving items (such as on a lathe or milling machine) which can cause them to appear stationary and safe to grab onto, though they likely have two sources of light on each just in case. I’ve also included a water wheel, either for power generation, or for the direct motion, to be connected to certain tools or machinery via axles and belts.

31
Swan with Tire (slrpnk.net)
submitted 6 months ago by JacobCoffinWrites to c/birding
 
 

 

Houses require maintenance. How much and how often depends on the design and its surroundings. They also require occupants - in my brief experience at least, they degrade much faster when they’re left cold and empty than when someone lives there, even if that someone doesn’t fix things. Weather, encroaching water, mold, ice, and animals can all cause compounding damage surprisingly fast.

I think of the solarpunk society I've been depicting as being post-postapoclyptic. They’ve been through the worst of the climate crisis, wars, plagues, and all kinds of shortages, and they’re trying to rebuild better. In some of my previous postcards, I’ve tried to imagine what the rural communities I grew up in would look like transformed into a modern version of how they looked a hundred years ago, with denser villages, trains, and wide stretches of forests and farmland in between. They were set up this way back when because it was practical for people who walked or relied on horse carts to get around day-to-day, and who traveled to use a boat or a steam train for a longer trip. A solarpunk society that doesn’t want to rebuild the infrastructure(s) to produce and maintain personal vehicles, fuel them, and to drive them on, might have to look pretty similar out here.

But what happens to the houses and developments spattered across the land between those villages? Every road with a house a quarter mile from its nearest neighbor, now miles from those hubs of public transit? In a society where public transit is effective, and cars are rare, I think a lot of roads will degrade pretty quickly. They already need tons of maintenance, and that’s with people using them every day, totally dependent on them, grudgingly agreeing to pay for it. It’s not uncommon to live thirty minutes or an hour from your grocery store today, but on badly broken roads, that kind of travel is going to be more difficult and costly. Some people will do it, heck, some will have held out through all the bad times and will stay no matter what else changes. But I suspect a lot of houses will have been abandoned a long time ago.

There’s tons of embodied carbon stored in those structures. In their carefully-refined materials, their transportation, and in the act of construction. Some of those materials might be very difficult to produce for a society that carefully watches its externalities and seeks to do as little harm as possible. And the longer they’re left abandoned, the more they’ll degrade. The structures will become unsafe, the materials will rot or break, or become inaccessible, and in some cases, they’ll pose environmental risks as fuel tanks rust out, chemicals escape their storage, or damaged structures catch fire (even with the powerlines cut upstream, abandoned solar panels or poorly-isolated generators backfeeding into the grid might allow for damage to an abandoned house to cause a fire). This is especially true with modern buildings, particularly the kind of McMansion featured in the scene, with their heavy reliance on petro-products like “structural” foam columns and facades, which will go up like a struck match in the next wildfire.

In some cases, old buildings could be put back into use. Perhaps they’re nearby something the rebuilding society needs. Maybe one development will make for a good farming community, and another the barracks of a logging camp. Maybe one near a river can support trade or fishing. But there will be others that are simply not very useful. They were practical enough for semi-suburban life when gas was cheap, cars were plentiful, and roads were maintained. But in a world where most people have other priorities, live in closer communities, use public transportation, and aren’t interested in rebuilding a car-centric world, these houses don’t make sense. And of course there's the ones in unsafe locations (flood plain, unstable/eroding cliff, etc) where they won’t last no matter what. To that society, deconstruction might be a very practical answer to both the long term threat posed by these structures and to their own building material needs.

Deconstruction is an alternative to home demolition. It means carefully dismantling the constructed components of a house so the materials can be salvaged and reused. Materials are typically removed in the opposite order in which they were installed, to maximize reuse.

By carefully disassembling these structures and hauling the materials back to their communities, they can build and expand for a much lower overall cost (both environmentally and in resources harvested from the world) while removing potential toxin or fire threats. And by filling in their cellarholes and replanting, they can rewild developed land, build better habitats, and restore their local ecosystems.

On top of that, even buildings picked over by looters may be full of usable stuff - furniture, dishes, cooking tools, hardware - which a society with an interconnected library economy could use to meet its needs without producing new items.

So that’s what I’ve tried to depict here, a deconstruction crew carefully disassembling old world structures so that everything, from the windows to the metal roof panels, to the cabinets to the stick framing itself, can be reused elsewhere rather than produced new.

They’ve been working from left to right in this scene, taking each house apart in reverse order to how it was built. Much as with construction, this would require different crews of specialists: inspectors, roofers, carpenters, electricians, plumbers, and others who can safely remove resources without doing unnecessary damage. Once a crew finishes their part of a building, they’d hopefully be able to move on to another one nearby.

They’re also replanting/rewilding the old backfilled foundations, something that would certainly help with breaking up the concrete (eventually). Roots are great at that.

I’m not sure if it’d be worthwhile to use concrete saws to cut at least some of the concrete foundations into construction blocks. It’d certainly help with restoring the site quicker, and it’d be a low-ish carbon source for concrete blocks, but the tradeoffs in labor, transportation, and power for the saw might not be worth it. In that case, they’d probably crack it up with a jackhammer before filling it back in.

There’s a lot of vehicles in this scene, so I should emphasize that these aren’t daily drivers. These are equipment used to haul work crews and construction materials on fairly short trips.

All the big trucks in the scene are old internal combustion engine vehicles converted to run on woodgas. I imagine they burn a lot of the wooden construction debris which were otherwise too small or damaged to be worth salvaging. Perhaps some trucks are even set up with plastic de-refineries and are able to use astroturf lawns, broken plastic siding, or “structural” foam facades as fuel on their trips. This isn’t perfect: it still produces pollution and releases CO2, but if the goal is to salvage as much material as possible, and to prevent it from burning pointlessly in the next wildfire, I could still see an aspirational society accepting that use of it.

As a bonus, woodgas vehicles are often used as generators, so they may be able to serve that role part-time on-site, powering lights and air pumps for confined spaces like basements, and even certain tools. Otherwise they’d probably use portable solar panels.

The other (smaller) vehicles are electric minitrucks and rickshaws.

I imagine that the workers are a mix of specialized crews brought in by the larger community for the scheduled deconstruction, and local volunteers who are working for trade in recovered materials. I imagine a lot of the cargo bikes, Chinese wheelbarrows, rickshaws, and minitrucks belong to them. I figure in place of real roads, the really small villages and isolated homesteads maintain a surprisingly dense web of rough trails suitable for mountain bikes or snowmobiles, which connect to all their neighbors.

Last art thoughts: I have another scene of a golf course and its surrounding McMansions turned into a solarpunk intentional community that I’d like to do, but the scope on that one is big enough it’ll be awhile before I can get to it. At this point, I’m confident I’ll make it though. McMansions, with their pointless, wasteful scale, their cheap construction, their reliance on petro-product materials, and their often vain attempt to spend their way to classiness, seem kind of like the antithesis of solarpunk design to me. Golf courses with their endless, expensive-to-maintain grass monocrop hold a similar, though less severe place in my mind.

If you read all that, thank you! And if you’re a person who owns a building in real life, and you’re thinking about doing some renovations, please consider reaching out to your local chapter of Habitat for Humanity or another group who will do deconstruction, rather than just smashing everything up and throwing it away.

 

My SO and I have been planning to start a mushroom garden for awhile now. You can buy these kits with mushroom spawn in peg form, and you just drill holes in a log and hammer them in. I'd had big dreams of going along the bike path, adding them to all the dead logs there, until I learned how important it is to properly and thoroughly inoculate freshly-cut logs in order to make sure your fungus of choice is properly established and safe from the competition. This was a bit of a problem as we live in an apartment and the circumstances where I'd cut down a healthy tree are seriously slim, and don't include providing food for mushrooms.

But one of the perks of having a big family is that one of them is always doing yard work, and when one of their birch trees bought it in a recent snowstorm, I was ready to jump in and claim a few pieces. They were happy to get rid of it; they feel grey birch burns poorly - and I was happy to take some because it supposedly turns beautifully on the lathe and it's a suitable medium for shiitake mushrooms.

As an aside, I prepped one thinner piece for use on the lathe. I clamped it to the table and used a draw knife (and a regular carving knife) to strip off the bark, before painting the ends with wax. This helps prevent cracking and checking due to uneven drying from the ends, and spalting/mold/rot from moisture under the bark. Assuming it does as well as the maple and oak I've done previously, it'll be ready to use in a year or two.

Okay, back on to the mushrooms! We bought our kit from a company called Northspore who provided pretty thorough guidance. Their instructions said that logs 4-6" thick and 3-4' long would be good, and one of ours fit that nicely. The instructions also said our log had been cut at about the worst time, after the buds on the branches had begun to swell. So... sorry, mushrooms! Hopefully you'll figure out how to make that work.

They provided a drill bit, instructions on how deep to drill (1") and where (in staggered rows, each hole 4" apart, 2" from their neighboring rows, so it makes diamond patterns). I grabbed a drill and measuring tape and set about drilling all the holes.

(I also cut a couple risers out of a dead log to keep the mushroom log off the ground)

Once all the holes were drilled, we started hammering in the pegs with a rubber mallet.

I don't have great photos of this step (it was a lot of fun) but here's one of the log after we got them all driven in.

The last step was to seal all the pegs in place with melted wax. The kit provided powdered wax and a little fuzzball on a wire handle for applying it. We set up a double boiler on a hotplate and melted the wax while we added the pegs.

We hid our mushroom log in a shady forested spot near the apartment fence. If all goes well, I'll be back with mushroom pictures sometime next year.

9
Rethinking Maps (self.writing)
submitted 7 months ago by JacobCoffinWrites to c/writing
 

cross-posted from: https://slrpnk.net/post/8880368

I wrote this for the Fully Automated community but I think it might be a useful idea for solarpunk writing in general. I mostly learned about writing fiction from reading worldbuilding posts and campaign logs from Tabletop RPG GMs like Shamus Young. (I always found TTRPG story advice to be very practical, compared to whatever resources for writers I'd found back then. Though it does probably explain my worldbuilding-first approach.) Either way, I hope this'll be interesting!

I've been thinking about Five's excellent comments about states and the borders of a post-state world on one of our previous discussions. And since this Lemmy community is intended partially as a repository of resources for players and GMs, I thought I'd gather up some of the cool maps I've been looking at, and organize them into categories of options/inspiration for anyone who is thinking about what a region outside the more-lore-established Nation of Pacifica might look like.

Five suggested a few really cool options, the first of which was the overlapping zones of the historical lands of indigenous peoples. The setting already features a massive, successful Land Back movement, so it would be quite reasonable from a lore standpoint to restore these wherever possible, or to establish a sort of hybrid mix with modern landmarks. This interactive map is also very useful: https://www.npr.org/2022/10/10/1127837659/native-land-map-ancestral-tribal-lands-worldwide

The next was Watersheds and I really love these maps. To paraphrase Five: in a world where states no longer exist, borders that still have importance are those drawn by nature. People still need to coordinate over land and water management. They give some wonderful world building suggestions though I'd also suggest that as Fully Automated! Is in the transition to a post-state world, but is not there yet, that there's excellent potential for factions, feuds, drama, and plot hooks in the existing states losing relevance to watershed organizations that overlap their territory and authorities, but don't necessarily encompass all of them.

The cool thing with watersheds is you can aim for huge nation-sized chunks of land, or tiny town-sized boundaries, all depending on your needs.

The last one I'll include is biomes. These are another natural boundary, though often a softer one than the watersheds.

And there's no need to restrict yourself to just one new way of redrawing the map. Societies are messy, and often slow to change. It wouldn't be unrealistic to end up with a mix of all of the above, along with existing cities and state or national borders too. Here's one example, though it's alt-history rather than scifi.

I hope this is useful, and if someday you're playing the game and redrawing the map, I'd love to see what you come up with!

13
Rethinking Maps (self.fullyautomatedrpg)
 

I've been thinking about Five's excellent comments about states and the borders of a post-state world on one of our previous discussions. And since this Lemmy community is intended partially as a repository of resources for players and GMs, I thought I'd gather up some of the cool maps I've been looking at, and organize them into categories of options/inspiration for anyone who is thinking about what a region outside the more-lore-established Nation of Pacifica might look like.

Five suggested a few really cool options, the first of which was the overlapping zones of the historical lands of indigenous peoples. The setting already features a massive, successful Land Back movement, so it would be quite reasonable from a lore standpoint to restore these wherever possible, or to establish a sort of hybrid mix with modern landmarks. This interactive map is also very useful: https://www.npr.org/2022/10/10/1127837659/native-land-map-ancestral-tribal-lands-worldwide

The next was Watersheds and I really love these maps. To paraphrase Five: in a world where states no longer exist, borders that still have importance are those drawn by nature. People still need to coordinate over land and water management. They give some wonderful world building suggestions though I'd also suggest that as Fully Automated! Is in the transition to a post-state world, but is not there yet, that there's excellent potential for factions, feuds, drama, and plot hooks in the existing states losing relevance to watershed organizations that overlap their territory and authorities, but don't necessarily encompass all of them.

The cool thing with watersheds is you can aim for huge nation-sized chunks of land, or tiny town-sized boundaries, all depending on your needs.

The last one I'll include is biomes. These are another natural boundary, though often a softer one than the watersheds.

And there's no need to restrict yourself to just one new way of redrawing the map. Societies are messy, and often slow to change. It wouldn't be unrealistic to end up with a mix of all of the above, along with existing cities and state or national borders too. Here's one example, though it's alt-history rather than scifi.

I hope this is useful, and if someday you're playing the game and redrawing the map, I'd love to see what you come up with!

 

The last webcomic I recommended was Black and Blue. This one has a lighter tone, and has got some superhero influences, though I think it still falls under cyberpunk.

I've caught up to 2022 and have enjoyed it so far. Apologies if it's better known than I realized, I just stumbled onto it a day ago.

 

A simple figure drawn on a green painted surface in florescent yellow-green paint. It kind of looks like a seriffed number '1' with feet, an eye, and a little hat(?)

 

This might be a bit of a reach but I’m wondering if anyone here knows enough about concrete production to help me plan the layout of my next photobash. I’d like to do a scene of a solar-thermal concrete factory – there are several supposedly in the works, like Synhelion’s new partnership with Cemex, funded by the US DoE, or the french company Solpart (whose prototype involved a rotary kiln), or Heliogen. Unfortunately I’ve had a lot of trouble finding decent photos of their setups, and even though Synhelion is apparently working on a pilot industrial-scale solar concrete plant, I haven’t found any plans to work from.

I’ve been doing some reading about existing concrete factories, and plan to keep as much as possible the same, while mostly modifying the kiln to include at least one structure similar to a solar falling particle receiver, and adding some onsite algae farms or greenhouses for capturing CO2 released by the burning of the lime, and a trainyard (either electric trains or fireless steam locomotives, given that it’s a solar plant) for moving material into and out of the plant.

I’ll say upfront I know very little about concrete production, and I’m struggling to come up with a kiln design that’ll hit the required temps for long enough, without burning the lime and messing it up.. Originally I’d pictured basically a rotating kiln feeding into a falling particle receiver, linked up so heat from the sunlight hitting the falling concrete could still travel up the tube and eventually up into the cyclones where the mix is dried. But it seems like the concrete needs a longer, slower firing time than whatever heat it gets wafting up from the aperture, and then a blast of light and heat as it goes past. The diagrams I could find seems to just be a rotary kiln with sunlight being blasted into the open lower end, but I’m not sure if that’s just the design they went with because it was a proof of concept prototype.

I also know that temperature changes are bad for lining of rotary kilns, which are normally run pretty constantly IRL, so it seems like they’d need some changes anyways to cope with the day night cycle?

In case you’re reading this and wondering why make concrete this way, the concrete industry is a huge portion of human CO2 production (around 8% total), due both to the release of CO2 from the chemical process of baking the limestone, and from the tremendous amounts of heat necessary for doing that. A more solarpunk society would hopefully use much less concrete overall, especially with changes in building design and priorities that allow for weaker materials like hempcrete and mycocrete, but for some things we’re still going to need modern concrete. Solar furnaces can hit temps well above what a rotary kiln uses, and heliostat systems aren’t far behind, and it’s a pretty direct use of heat from the sun, which would minimize conversion losses. It’s not a great fit for every current concrete plant, but it seems like it could help.

 

I just finished re-reading Harry Harrison's The Stainless Steel Rat Gets Drafted which was my favorite from the first time I read the books awhile back.

On this pass I was surprised to find that the the economy and system of Individual Mutualism briefly outlined in the second half of the book actually looks a bit (to my uninformed eyes) like the economy from FA! with a dash of Walkaway's philosophy thrown in. I don't think it's enough to reference it as a work in the genre or anything, I just thought it was neat. Harrison was quite progressive so I wonder if he pulled inspiration from anarchist works of the time.

I thought I'd post an excerpt of the text. To be clear, this isn't presented as a complete and actionable philosophy. In the story, the Rat is out to kill the guy who got his mentor killed, it turns out that guy is top general of an army. While infiltrating the fascist nation that that military rules, he accidentally gets himself drafted. That's all good with him - his target's in the army, he's in the army, he can make this work. Shenanigans ensue. During that time, he's part of an invasion of a society the book presents as bafflingly peaceful, which follows a largely incomprehensible philosophy called Individual Mutualism. This makes it both an excellent target for an invasion and an excellent resource for the Rat. Here's a scene of some locals trying to explain it to him (apologies for the quality of the photo):

Their emphasis on passive resistance and just leaving whenever possible reminds me a lot of parts of walkaway, but this section in particular reminds me of the economy section of FA!, where money is mostly used to track short term trades, and investment for a profit is banned.

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