Patent ID: 9127860
Filing Date: 2015-09-08
Classification: F24S,F28F,Y02B,Y02E,Y10T

Abstract:
1. A solar energy absorber unit, comprising: a collector plate made of a heat-conductive material having a front surface adapted to absorb solar energy and to convert the solar energy to heat, and a rear surface opposite to the front surface; a rear panel having an inner surface and an outer surface, said inner surface being attached to areas of said rear surface of the collector plate via a fluid-tight bond, whereby said inner surface of said rear panel and said rear surface of said collector plate together define at least one fluid-conveying channel between said areas of said rear surface of the collector plate where said rear panel is attached thereto; and connectors for introducing a heat extraction fluid into said at least one fluid-conveying channel and for removing said fluid therefrom; wherein said collector plate comprises a core layer of an aluminum alloy provided with a cladding layer forming said rear surface of the collector plate and an additional cladding layer forming the front surface of the collector plate, wherein the solar energy absorber unit further comprises a layer of material disposed on the additional cladding layer and adapted to enhance the absorption of said solar energy, and wherein said cladding layers are made of aluminum or an aluminum alloy having a total content of alloying elements and impurities, if any, of no more than 0.5 wt. %.