[Operator]

Hi,

Maybe the title should be how to get fresh water in general ...

The water cone looks like something I had in mind myself to get fresh water
from either seawater or rainwater.

I think you should just place it overhead a source of water. The sun will
vaporize the water, so vapor rises into the cone.

The more vapor comes into the cone the higher humidity will be hence
condensing the vapor to water again ... drops will sink into the side shell.

It's a natural use of distillation of water ...

You might improve the efficiency by covering the top of the cone with
aluminum foil in order to keep the warmth of the sun away from the cone.

You need sun heat on the water to evaporate ... the cooler the cone stays
the faster the vapor will condense again.

To thrust this process further you might think of creating a parabolic mirror
to heat a tube in the focus point containing water. This will basically boil
the water. So besides distilling the water you will get rid of bacteria and
stuff already in your water source. By boiling it will vaporize rapidly, probably
even creating steam.

And to make it even more efficient you might consider using the incoming
dirty water to cool the outcoming steam or vapor.

The heat exchange will work as an advantage in both ways:

1. The steam is cooled more rapidly
2. The dirty water gets pre-heated

You have to take great care however that you don't contaminate the clean
water with the dirty-water in the heat exchanger ...

More ideas of this principle may be applied if one considers that the air blowing
around us is already humid in some sort of degree. By concentrating humid
air or cooling it down you will be able to condense it. Create your own 'rain' sort of speak.

Good luck ...