Tarig, I thought I would ...

Tarig, I thought I would mention that if you made one 1.2 meters long with a reflective mirror 1.2 meters long by 1.5 meters wide, you should be able to purify about 3 liters per hour. And it would also let you know how polycarbonate or acrylic plastic works in such a design. I think with using condensed steam to assist in heating the water, you would see some increased efficiency. And if something like this works for you, then I wouldn't be surprised if you have friends who might wish to help you. :-)