Hello Carlos and thank you for your interest in my book. My answers are below: On 12/14/2011 08:06 PM, carlos e wrote: Hello Mr George,h...

Two types of solar thermal collectors are in common use. The parabolic trough concentrator (example mounted on the right side of the solar ...

My interest is in using the glass evacuated tubes not as a component of a commercial collector, but as an insulated collector for a DIY para...