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US 6,003,509 AGranted
Solar collector and method for production thereof
AssigneeBecromal S.p.A.
InventorsGiovanni Pietro Chiavarotti, Francesco di Quarto, Salvatore Piazza, Carmelo Sunseri
Life of this patent
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Abstract
A solar collector for absorbing solar energy and for conversation thereof into thermal energy includes an aluminum foil. One side only of the aluminum foil is blackened to an extent such that it will absorb solar energy, preferably to an extent approximating a black body. The blackening is achieved by subjecting the one surface of the aluminum foil to an electrochemical surface etching treatment.
Claims12
A method of production of a solar collector to be used for absorbing solar energy and for conversion thereof into thermal energy, said method comprising:
- blackening one side only of an aluminum foil, said blackening consisting of surface etching into the aluminum material of said one side of said aluminum foil in a manner and to an extent sufficient to enable the thus etched said one side to absorb thermal energy, said surface etching being conducted with application of at least one of direct current, pulsed current and alternating current.
Dependencies are inferred from the claim text.