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1 day agoI find the idea very solarpunk
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Cake day: November 27th, 2023
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Could it be a vertical wall of greens? I am imagining a glass building with lettuce behind the south-oriented windows, on each floor. Seems technically complicated but interesting as a though experiment.
Edit : I was wrong, vertical farming is as ground-surface efficient as horizontal.
"Proof" with a quick calculation for those interested
I compared numbers using batavia lettuce as an example. Those are yearly outputs in kg per square meter of sunlight, assuming central Europe.
For vertical hydroponics, I’m assuming a solar irradiation of 1’000 kWh/m²/year, a panel yield of 20%, and no other loss, that is 200 kWh/year of electric power per m² of solar panel.
1 kg of vertical lettuce needs about 8 kWh to power the lights (https://www.frontiersin.org/journals/plant-science/articles/10.3389/fpls.2026.1783548/full)
So a square meter of solar panel should produce about 25kg of lettuce a year. This compares to 20-50kg/m²/year in horizontal non-light-supplemented hydroponics.
My numbers and assumptions could be quite a bit off, but clearly I was wrong with the 30x comment.
My old comment :
Vertical farming isn’t very solarpunk though, it takes about 30m² of solar pannels to grow what could be grown on 1m² using direct sunlight. And I have not mentioned accumulators yet.In my opinion this is the exact opposite of low-tech energy efficient developpement that solarpunk aims.I do strongly support urban agriculture, if on roofs, using direct sunlight as energy source, and heated with the lost heat of the building below because that is simple and efficient (I would even call it elegant).
1·29 days agoGangs of wasseypur’s song are bangers, I’ll be sure to watch the movies. Thanks!
Any movie album you would recommend?
3·1 month agoMerci !
Please do anyway, many of us speak other languages !
You guys don’t normally have a passport? You said “apply for the first time”
1·1 month agoIt has been a serious subject in engineering for decades, it’s only becoming more common because heat is becoming more expensive and polygeneration can now be used as for marketing
And how do you cool it in summer, when people don’t need as much heat?
It’s much more complicated than it seems
Using a salt-water brine you can make lactofermented cucumbers. I heard it was great but i never tried it myself. I guess it’s now on my to-do list!
I received a formal warning for leaning back on my chair (didn’t get fired though)
Random machines replacing random machines
Thank you for correcting me !
I kept the 30x number in mind since when I worked for a horizontal farming tech company. It is incorrect thanks to the wavelength trick.