How it works?
A "solar flat plate collector" typically consists of a large flat heat absorbing plate,
usually a large sheet of copper which is good conductors of heat,
and which are coated with black chrome to absorb as much solar radiation as
possible for maximum efficiency. This black heating surface has several
parallel copper pipes or tubes called risers, running length ways across the plate which
contains the heat transfer fluid, typically water. These copper pipes are bonded with
directly to the absorber plate to ensure maximum surface contact and
heat transfer. Sunlight heats the absorbing surface which increases in temperature. As
the plate gets hotter this heat is conducted through the risers and absorbed by the
fluid flowing inside the copper pipes which is then used by the household.