Recent content by Berkan

I'll do that, thank you!

Okay, thank you! I thought about copper, because it has a pretty good thermoconductivity

(Sorry for my bad English, I'm from Germany) Hello! I need to build a solar cooker as a school project. Our build needs to be able to heat 1 liter of water in 80 minutes. My idea was, to heat the water by using a fresnellens. I've bought a 15.6 x 15.6 inches fresnellens for that. I thought...