Anyone achive solar power overnight? Answered
Here is how to do it:
Use a standard 55 gallon steel drum and stick one of these on it.
Provide water cooling for the TEG: http://www.customthermoelectric.com/Water_blocks.html
If your water is 20 Celcius, you should pump 36 Litres/hour to keep max power output.
Also hook up piping for hot oil for heating
Now wrap it with 400 mm of rockwhool insulation.
Fill it with molten salt and heat it to 250 Celcius.
Tadaa: 24 W of power output, round the clock. (minus the power for the cooling pump, maybe 1-2 W)
I calculate that the temperature will drop from 250 to 225 Celcius in 16 hours.
To get the temperature back up in 8 hours you need to heat it with 2400 W.
You can do this easily with a solar trough system of about 3 m2. A trough is good because you only need to align every few days.
Oildrum 50$ ?
Salt 370 kg = 150$?
Trough (plastic sheet and mylar) 100$?
high temperature oil pump 500$ ?
About 1000@ total.
Does seem like a lot for a little.
Anyone have a better idea?