Questions needing answers:
What are the major types of flat panel solar collector?
How can I use low-grade heat to move air?
How can I make my own solar chimney?
What's the advantage of an evacuated collector?
Why are selective surfaces (emissivity << absorptivity) important?
What are the best selective coatings for a solar thermal collector?
What's the advantage of a concentrating collector?
What does a parabolic trough look like?
What does a tracking dish concentrator look like?
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