3 ms·
Not an engine, but some friends of mine got a mylar sheet that's black on one side and reflective on the other. We tried it out in the desert tied onto trees/v
by cameldrv 11mo ago
Not an engine, but some friends of mine got a mylar sheet that's black on one side and reflective on the other. We tried it out in the desert tied onto trees/vehicles. You put the shiny side down, so the hot IR radiation of the earth is reflected away, and the black side sees the extremely cold (in IR) desert sky. If you put a little hole in the middle and put a bucket under it, you get a fair bit of water, because the mylar sheet gets about 20 degrees C below ambient and a lot of water condenses on it. (even in the desert)
- wombatpm 11mo agoNow you just need a couple of droids and you could go into the moisture farming business
- jeffrallen 11mo agoNah, those are not the droids he's looking for.
- sigmoid10 11mo agoWhat I really need is a droid that understands the binary language of moisture vaporators.
- timdiggerm 11mo agoBut can he speak Italian lawn games?
- deleted 11mo ago[deleted]
- nmeagent 11mo agoI was going to look into this once, but instead I opted to go into Tosche station to pick up some power converters and unfortunately never quite got around to it.
- viraj_shah 11mo agoFascinating 20 degrees C is huge. What's a fair bit of water? At what time of day and how long did you collect water?
- gsf_emergency_6 11mo agoThese guys claim >40degC, and are deploying in Dubai.. https://www.i2cool.com/tideflow/uwJVdixI.html https://www.i2cool.com/tideflow/uwJVdixI.html https://baitykool.com/radiativeskycooling.html https://baitykool.com/radiativeskycooling.html Peak performance, I think. Considering that they got the black white sides flipped
- cameldrv 11mo agoI didn't do the measurment and it's been a while so it's possible I misremembered the temperature delta, or maybe it was degrees F. It was about a 2-3 square meter sheet and it made about a liter of water overnight.
- nickdothutton 11mo agoI think I read something similar in a "Boys survival book, desert chapter" in the early 80s.
- kragen 11mo agoWow, that's awesome, and a much bigger temperature difference than I would have guessed. Did you get frost?
- burnt-resistor 11mo agoNeat. Reminds me that Applied Science made an acoustic radiometer video recently. https://youtu.be/lAeJvZfVLbE https://youtu.be/lAeJvZfVLbE