Back to results
US 12,422,168 B2Granted
Spectrally selective solar absorber coating
AssigneeAgenzia Nazionale Per Le Nuove Tecnologie, L'energia E Lo Sviluppo Economico Sostenibile (Enea)
InventorsSalvatore Esposito, Antonio D'Angelo, Claudia Diletto, Giorgio Graditi, Antonio Guglielmo
Life of this patent
Estimating the term…
Abstract
A solar absorber coating for a receiver element of a solar thermal or thermodynamic system. An additional aspect is a receiver for solar thermal or thermodynamic systems comprising a coating. The receiver may be an evacuated receiver pipe or a non-evacuated or air-operating receiver pipe.
Claims18
A spectrally selective solar absorber coating for a receiver of a solar thermal or thermodynamic system, the spectrally selective solar absorber comprising in sequence:
- an infrared reflecting multilayer structure;
- an absorbing multilayer cermet structure;
- and
- an anti-reflection multilayer structure;
- wherein the infrared reflecting multilayer structure comprises:
- (i) an infrared reflecting base layer with a barrier and adhesion layer function, which is designed to be, in use, in contact with a substrate, which is part of the receiver;
- said infrared reflecting base layer consisting of one or more transition metals selected from among Ti, V, Cr, Zr, Nb, Hf, Ta, Mo, W or of a nitride of one or more of said transition metals;
- and
- (ii) a multifunction structure, which is placed on said infrared reflecting base layer and comprising at least:
- multiple additional infrared reflecting layers with the function of increasing the infrared reflectance of the absorber coating, each of which consists of a metal selected from among Au, Ag, Cu, Al, Mo and W, and
- multiple stabilizing layers for said additional infrared reflecting layer, each of which consists of
- a ceramic material;
- a cermet material;
- or
- a material consisting of one or more transition metals or of a nitride of one or more of said transition metals;
- said additional infrared reflecting layers and said multiple stabilizing layers being arranged so that one reflecting layer alternates with one or more stabilizing layers;
- one of said stabilizing layers being placed in contact with said absorbing multilayer cermet structure.
14 more elements
Dependencies are inferred from the claim text.