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

submitted 2 days ago by Cattail@lemmy.world to c/asklemmy@lemmy.ml

4 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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[–] Cattail@lemmy.world 1 points 2 days ago (1 children)

You could lower the bucket to boil the seal container.

I do have trouble imagining two containers with two different pressures but I get you can have a pressure valve like in a refrigeration system.

The pressure on the seal container would seem to be the same pressure as the phase changes. The container in the video was crushed by the atmosphere so that implies the pressure is lower than atmosphere post phase change.

But there seems be an issue once the water has became vapor like would the boiling point move enough so that the water would condensate and would condensation reduce the pressure thus lowering the pressure and boiling point.

There would be water in both the containers and tube. Seems strange that water in the tube at the vapor/liquid barrier would evaporator then condense in what's essential a similar environment. Its possible when I think about it just the seal container water can evaporate and go back into the tube

I can't really do calculations because I don't know the process yet, but I think boiling water would be more energy than lifting water 34 feet since water heat capacity is so high.

Right now I do think the flaw would be it being a slow process or even inefficient

[–] Scipitie@lemmy.dbzer0.com 1 points 2 days ago

Raising it lowering the container works only if it is not protected from environmental pressure - but you're right: creating two different pressure environments that are somehow connected is ready in a thought experiment but then you tell that to the engineer and they get their third heart attack of the week...