This is a very simple solar condensor that will give a small amount of pure water each day .This unit is suitable for supply water to lead Acid batteries ,but gives too little for a survival situation.
The unit consists of three main parts.
One three litre or a two litre plastic coke bottle. One 1.5 kg coffee can or larger. One plastic bottle to collect the distilled water in. Some plastic drip irrigation hose [small size]. assorted drip irrigation threaded connectors [smallest you can get].
Assembling the unit
First thing to do is to cut a large diameter hole in top of can lid. The bigger the better.
Use a nibber to do this, Paint the coffee can with a good rust proofing paint and then let stand for some time.
When dry give several washes to remove paint residue.
With the Plastic three litre coke bottle remove top of bottle with a sharp knife ,just below the start of the dome.
Make a circular plastic plate from a 1/2 inch plastic board [ a plastic chopping board is ideal ] to fit inside the tin lid diameter.
In the circular plastic plate cut a hole to match the one in the tin lid. [ this is so water vapour can rise ].
[ A coping saw may be able to do this ] I used a lathe to make this part.
Also make a circular groove just inside next to where the wall of the plastic bottle will sit so that water can collect there when water has condensed. Drill a hole in side of plastic plate to link with the groove.
Insert a plastic screw thread connector in drill hole ,glue if necessary but preferably just screw into the plastic plate.
Fix the modified coke bottle to the circular plastic plate and fix to the top of coffee can lid.
How to use
Fill the coffee can with water right up to the top, place lid on can with the coke bottle fixed to it.
Connect a flexible plastic micro irrigation hose to the screw thread on plastic plate and put the other end into a collection bottle at a lower level.
Place unit in bright sunlight and wait make sure all parts are secure as any strong wind will blow the plastic parts away from the unit
Operation
The water in tin can is heated and rises up towards plastic bottle where it condenses and run downs the inside of plastic coke bottle towards the groove where it collects and flows through the threaded connector and plastic hose into the collector bottle.
