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Can you distil water with a bottle and a long hose? (lemmy.world)

submitted 3 weeks ago by [email protected] to c/[email protected]

8 comments fedilink hide all child comments

I watched a video that uses gravity to boil water just by lifting it and lowering the pressure. explanation is better in this video

https://www.youtube.com/watch?v=hHNoHhbfFDQ

so I'm running the scenario through my head of lifting the bottle to the point of "cold" boil then lowering it down (while keeping the hose above boil level to avoid contamination from the original) and I'm trying to figure out what the issue would be.

would the water vapor never condense until a temperature change happened, would it be too slow at distilling since there can only be as much water vapor can only be as much as the container?

what are the flaws or limitations

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[–] [email protected] 1 points 2 weeks ago (1 children)

true, i guess i was thinking salt water distillation, so maybe contamination would okay. but I asked ai and since it would only be water vapor and that pressure would be temperature dependent then at room temp the would be 0.03 atm so there's nothing in the vapor part. (at 100 C it would be 1 atm is okay)

there is benefit to putting a still in a vacuum because it will absorb thermal energy and lowering boiling point save energy

[–] [email protected] 1 points 2 weeks ago* (last edited 2 weeks ago) (1 children)

Maintaining vacuum is difficult and most likely more expensive than just using a cheap energy source

For example, a solar salt distillation system can be totally passive, even if slow and space inefficient: https://en.m.wikipedia.org/wiki/Solar_still

[–] [email protected] 1 points 2 weeks ago

Yeah I was thinking you painted the bucket with tar venta black and really get sun to boil water. Other option is collecting vapor but that could be space inefficient