Turn a satellite dish into a parabolic dish

[guyver2k]

Sorry I'm new to solar water heaters... how much hot water can you produce? how long does it last? and how hot does it get? and how much will it cost?

[triffid]

I mentioned this earlier but you can focus up to 10x solar on a solar cell without doing much harm to the cell.Just as the cell starts getting hot a gust of wind usually comes along to cool it down.If you must you can always use a 12 volt computer fan and use solar electricity to run it .That could be running as you are generating electricity.Just use air to cool the cells with.So it is with electricity I would think you can double or triple the heat output of a solar hot water heater.Triffid

[triffid]

There are solar hot water heaters you can buy for camping(walmart) they hold about 3 gallons and take about 2 hours to heat up for  hot water in the sun for a shower somewhere on your camping trip.
If you want one for your roof there are all kinds of books out there.Mother earth has always been good for that kind of stuff.If you don't want to buy any books,check out the local library.Usually the more simple the design the better .Triffid

[triffid]

I know glass windows allow ir radiation to pass through (at shorter wavelengths).The ir radiation (once passed through)becomes a longer wavelength and cannot escape again.So the room becomes hotter.I think quartz windows block the ir radiation altogether.But they cost a lot!Triffid

[kampen]

@ All,

See below, this is the flow-sheet diagram: