So much is incorrect with the things you have said. For one, on ISS the angle is very important or else they wouldn't have had to conserve power when that one rotary joint malfunctioned. If there was so much atmosphere in the orbit of the ISS that it needs to worry about aerodynamics, it would have slowed and crashed a long time ago.neutrino78x":1vz75687 said:Actually I think they tilt the panels mainly for aerodynamic reasons. (they are in slight atmosphere to be protected from radiation). But as long as the panel is illuminated, it doesn't mind the angle.
Very little has changed with silicon PVs in the last 20 years.neutrino78x":1vz75687 said:It is negligible with modern technology. That was 20 years ago. Like I said, get a solar powered calculator and try it. You will notice the calculator continues to work. Where I work, I have a solar powered calculator that I use mainly inside of a trailer, NO direct sunlight. Works just fine. And no it doesn't have a battery.
Photo voltaics use only infra red light. They use no visible light at all. That's why PVs are so inefficient.neutrino78x":1vz75687 said:You actually need a special PV that is sensitive to IR if you want that, most of them use visible, they might be more sensitive to different frequencies depending on what technology you're using...But yes, in daylight on the Moon, there is a lot of IR. It is very hot on the surface of the Moon in daytime.
But you mention IR, that is a good point, because they are working on IR photovoltaics which will be more efficient than stirling engine, mainly for use in a RTG, but it would be useful in this context also (solar thermal).
Hence the shade for the radiators and the cool side of the sterling engine.neutrino78x":1vz75687 said:t is shade for the radiator (waste heat from the chain reaction) I'm worried about. You can't radiate into 200 C.