Mildly Interesting

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Ancient Iran had air conditioning (lemmy.world)

submitted 1 year ago by FlyingSquid@lemmy.world to c/mildlyinteresting@lemmy.world

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[–] Lazz45@sh.itjust.works 0 points 1 year ago* (last edited 1 year ago) (1 children)

That is the deepest depth I could find being actively tracked on the website I ended up on. I did not wanna do a deep dive into "great" average soil temp data lol. If you have a good source of data I will gladly change my comment to include the updated numbers. I wanted to say the average soil temperature at depth is ~50-55 degrees F, but I hopped online to make sure that was not a number that I know to be true due to where I live. Good to know that its roughly 6 feet where it stabilizes

[–] Rodeo@lemmy.ca 1 points 1 year ago

If you go down deep enough the earth temperature is stable at 12 C. But I'm pretty sure that's like thousands of feet down. Geothermal rigs drill 500+ meters (1600 feet) down. Having a hard time finding a source on the stable earth temp though.

I mentioned 6 feet because it's well below the frost line where I am, but I guess in that part of Iran they probably don't have to worry about that.

Mostly I was just wondering if you had found something on how deep those waterways were actually built.