Metal is a good conductor of heat. Maybe
I'll try an experiment when I do the laundry
next time. I can take my clothes out of the
dryer after they are dry and then feel the metal
and the plastic in the dryer, to see if one
feels hotter than the other. They should both
be at the same temperature, so the one that
feels hotter must be conducting heat better to
But something that conducts heat lets the
heat go both in and out. So water in metal
pipes might heat fast in the sun, but it would
also cool fast when there is no sun.
So the simple answer to your question is that
metals are a good conductor of heat for pipes in
a solar panel.
According to thank you sun, the heating solar panels
are usually built using Aluminum or Copper
metals to receive and transmit heat.
Keep asking questions! Best wishes,
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