Solar heat collector, comprises pair of parallel plates with gap in between for heat absorbing medium to flow through

摘要

The collector (1) comprises two parallel plates (2, 3) with a gap (6) in between for a heat absorbing medium such as water to flow through. At least one of the plates forms the sunlight receiving surface. The plates display a pattern of cooperating pyramid or semispherical-shaped protrusions (4) provided with a layer of photovoltaic material.