Solarpunk Urbanism

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A community to discuss solarpunk and other new and alternative urbanisms that seek to break away from our currently ecologically destructive urbanisms.

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submitted 3 months ago* (last edited 3 months ago) by Blair@slrpnk.net to c/urbanism@slrpnk.net
 
 

Prior to when electricity became common place, people were looking for other ways to make life easier. One of these inventions, the solar water heater, came in 1760, and boomed with popularity in the 1900’s for warm areas.

“In 1891, Clarence Kemp released the first ‘Climax’ solar water heater in Baltimore. He placed several water-filled iron elliptical tubes inside the box in series with cold water entering one side and warm water exiting from the other end. Multiple tubes avoided warm and cold-water being in close proximity, thus avoiding adverse heat exchanges.” PassiveHousePlus

These early models did have faults (such as heat lost, and poor resistance to frost, but continued to improve and build with popularity over time.

Eventually, for a complex number of reasons, solar water heaters disappeared and gas and electric took the show.

Today, this tech is making a comeback, though with modern touches.

Videos with More Info:

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This is an article that dates back from 2019 but I think it's pretty relevant still.

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submitted 3 months ago* (last edited 3 months ago) by Blair@slrpnk.net to c/urbanism@slrpnk.net
 
 

((Note: this is post of mine from a different site that is about a year old, but thought I would share it here too in case it helps anyone))

Old technology is once again getting attention, and this time it’s air-conditioners made out of terracotta clay.

“She was inspired by the Palestinian Jara, a traditional clay water container that is hung from the ceiling to cool water and cool the air. Specifically, the water contained in the hollow internal structure moves outward through the porous clay walls. With the heat of the air, it evaporates and is transformed into water vapor. This reaction absorbs heat from the surrounding air, cooling the water, the material itself and consequently the air in the room.” Forbes India In regards to Yael Issacharov.

There are two unrelated people currently being mentioned for promoting their designs using this technology; Monish Siripurapu(from India), and Yael Issacharov(from Israel).

Monish Siripurapu’s design is based off a beehive and uses a small pump to create a beautiful water fountain that both cools the air and can be used for gardening.

Yael Issacharov’s design uses no electricity, and instead relies on the naturally porous nature of the clay.

For dry and hot climates, this old technology could provide cooler air at an affordable price. The clay is readily available almost entirely world-wide, making it accessible and inexpensive.

"The humid clay traps some heat the air and the surrounding air gets cooled down to around 6-10⁰ C due to the process of evaporative cooling.“ EcoIdeaz in regards to Monish Siripurapu

Videos with more info:

Based on this information, I am wondering if a terracotta pot and a fan would have the same effect for a small room. Here's a drawing of mine to help explain what I mean:

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submitted 3 months ago* (last edited 3 months ago) by Blair@slrpnk.net to c/urbanism@slrpnk.net
 
 

^ (Image Source) ^

It is no secret that white reflects heat, and that is true for your roof as well. In fact, many hot climates around the world have been utilizing this knowledge for centuries.

“The darker the surface, the more the heating. Fresh asphalt reflects only 4 percent of sunlight compared to as much as 25 percent for natural grassland and up to 90 percent for a white surface such as fresh snow.” Yale

Other places have also started catching on. For example, even in 2012 in the USA, volunteers started painting tar roofs white in New York. However, this is not something trending everywhere. Some places are accustomed to dark colored roofs, so even in hot climates, they are slow to change.

This change will of course be easier in places where flat roofs are more common and ready to paint, but slanted roofs have options too.

For example, metal roofing is more environmentally friendly than shingles(100% recyclable), is more durable, and can last longer. What is more, the reflective properties of the metal can also help cool your homes. Some are now even made to look like tiles.

^(Image Source)^

There are other (more expensive) options as well, such as painted terracotta.

However, if these are not your style, solar panels on your roof may also reflect heat, so you could generate some power while you stay cooler.

“Solar panels “cool daytime temperatures in a way similar to increasing albedo via white roofs,” according to a study by scientists at the University of New South Wales. ”Yale

If you live somewhere cooler, I do not suggest a white roof, since the white can raise winter heating bills.

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https://youtu.be/uhbDfi7Ee7k

This video by Technology Connections talks about how window awnings can greatly help cool your home.

Another thing I want to add is that window awnings can protect windows. We get pretty big hail here, and (wood or aluminum) awnings can save your window glass. I have also heard of “Clamshell Awnings” which are on hinges, so you can remove the poles and lower the awning to cover and protect windows in extreme weather.

Lastly, here are some old window awning ads for your entertainment (from Wikimedia commons)

Image Links: Image 1, Image 2, Image 3

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Source: @joan_de_art

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Text version vi BoredPanda.

Creator at Substack

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cross-posted from: https://feddit.de/post/12718654

Group of university students awarded plot after city hall passes plan for 15 to 20 cooperative projects

De Torteltuin, or “Dove Garden”, was born from an existential, if depressingly common, question. A group of young Amsterdammers, most still at university, looked into their futures and asked how they would ever afford to live in their own city.

“It was 2020, we were 22 or 23 years old,” said Iris Luden. “It was a dream. We were fantasising. What if we built our own place? We imagined a kindergarten, growing our own food … We got together every month to talk about it. But slowly, it happened.”

Amsterdam, the sought-after capital of a country in an acute housing crisis, is one of the toughest places in Europe to set up home. Private-sector rents are sky-high – €900 (£770) for a room in shared flat – and you can wait up to 20 years for social housing.

"It’s just so bad,” said Luden, an AI engineer fortunate enough still to be living in her old student accommodation. “People are just constantly on the move, once a year on average. You can’t settle. We wanted somewhere affordable. And a community.”

The group’s vision might have stayed a dream had city hall not passed a plan for 15 to 20 cooperative housing projects within four years, half of them self-built. The aim eventually is for 10% of all new Amsterdam housing stock to be cooperatively owned.

“We started to take things more seriously,” said Lukas Nerl, 28, another Torteltuin member. “We set up subgroups: financing, sustainability, the rest. We had to learn a lot, fast. We registered as an association, wrote a project plan. We applied.”

To their amazement, they were accepted – perhaps, said Nerl, precisely because of their youth, and because, as recent graduates, they might be assumed to be capable of navigating their way through a labyrinth of rules, regulations and bureaucracy.

They secured a team of architects with experience in non-profit cooperative projects, raised the money to pay them, and presented a plan for a four-storey, timber-clad, sustainably built block of 40 apartments, from studios to three-bedders.

Against stiff competition with other projects, De Torteltuin was awarded a plot 20 minutes from the city centre by tram and 45 minutes by bike, in IJburg, a new residential quarter slowly emerging on artificial islands rising from the IJmeer lake.

Through a mixture of loans from a bank and city hall, crowdfunding from friends and family and two bond issues, the 26-member group has raised almost €9m of the estimated €12 to €13m construction cost. With luck, work will begin by year-end.

The cooperative will own the building, with every resident paying a monthly rent, said Enrikos Iossifidis, another member. About a third of the apartments will qualify as social housing, while the most expensive – a family flat – should cost €1,200 a month.

"A decade ago it wouldn’t have been possible,” said Iossifidis. “Even now it’s been a rollercoaster ride: when building costs soared after Russia invaded Ukraine, there was a truly awful moment when we thought it might not happen after all.”

But by late next year or early 2026, the group should be thinking about moving into a carbon-neutral home complete with roof-top solar panels, communal spaces on each floor, guest rooms, a shared toolshed, a stage and a music studio in the basement.

Their adventure is not just about affordable housing, said Luden. “It is very much also about building a real community,” she said. “Some flats are being reserved for people who face even bigger housing challenges – asylum seekers, for example.”

De Torteltuin, said Nerl, “actually sets a vision of future city living. It’s not one of pollution, concrete, high-rises, speculation, ever-rising rents and more unaffordable mortgages. The new homes of the city will be social, sustainable – and affordable.”

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A huge congratulations to @philipthalis on his well-deserved award.

Philip is undeniably both one of Australia's most respected architects and a tireless advocate for good urban design.

More importantly, he's not afraid to speak up publicly against bad state government planning decisions, as he did with Barangaroo, even when there's a personal cost.

https://www.smh.com.au/national/nsw/architect-philip-thalis-paid-the-price-for-being-outspoken-now-he-s-won-the-profession-s-gold-medal-20240510-p5jcjb.html

@urbanism #Planning #UrbanPlanning #Cities #Urbanism #Buildings #Architecture #Transport #Architect #Walking #Walkability

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Inklusibo’s new manual on housing rights provides an in-depth narrative of the urban poor’s right to housing and livable spaces. This is the first free publication under the Housing and Living Spaces category.

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Why do alt-history people never focus on infrastructure or innovation? What would have happened had bikes been invented centuries before cars instead of around the same time? How different would the built environment and our culture have looked?

Personally, I think centuries of more established bike use would have created an infrastructure that limits how well cars take off. Cities would have entrenched themselves in a cheap, dense manner of transit.

I could be wrong, lots of dense cities were wrecked by the car when it was commercialized. I'd love to hear any thoughts :)

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From Australia to Ontario, cities are taking up unnecessary stretches of concrete and asphalt, allowing nature to take hold in their place.

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This is quite a long text, but you don’t need to read the chapters in order and each chapter is on a different urban experiment. It looks at “radical municipalism” or a communities taking back power of their city and rebuilding it into what they want to make of it. The rebel cities are:

  1. Rio de Janeiro, Brazil
  2. Rojava, Northern Syria
  3. Chiapas, Mexico
  4. Warsaw, Poland
  5. Bologna, Italy
  6. Jackson, Mississippi
  7. Athens, Greece
  8. New York City, New York & Warsaw, Poland
  9. Reykjavík, Iceland
  10. Rosario, Argentina
  11. Newham, UK
  12. Valparaiso, Chile
  13. Porto Alegre, Brazil; Greensboro, North Carolina
  14. Montevideo, Uruguay
  15. Communes, Venezuela
  16. Cape Town, South Africa
  17. Goma, DR Congo
  18. Jemna, Tunisia
  19. Gdansk, Poland
  20. Dakur, Senegal
  21. Mumbai, India
  22. Phan Ri Cua & Binh Thuan, Vietnam
  23. Seikatsu, Japan
  24. Catalonia, Spain
  25. Barcelona, Spain
  26. Denmark and Scotland
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