Mirror having reflective coatings on a first surface and an opposite second surface

摘要

A solar mirror includes an opaque reflective coating on a surface of a transparent substrate facing away from the sun and a transparent reflective coating on the opposite surface of the substrate. The transparent reflective coating increases the percent reflection of wavelengths in selected ranges, e.g. wavelengths in the infrared range to increase the total solar energy reflected by the solar mirror to increase the solar energy directed to a receiver that converts solar energy to electric and/or thermal energy.

主权项

1. A solar reflecting mirror comprising:
a solar reflecting mirror subassembly and a reflecting coating, the solar reflecting mirror subassembly comprising:
a transparent glass substrate having a first surface and a second surface opposite to the first surface, the glass substrate having a composition comprising an ingredient that absorbs one or more wavelengths of the electromagnetic spectrum, andan opaque solar reflecting coating over the second surface of the glass substrate, wherein the second surface of the glass substrate is between the first surface of the substrate and the opaque solar reflecting coating, and solar energy incident on the first surface of the substrate has a first percent reflection of solar enemy from the solar reflecting mirror subassembly; and the transparent reflecting coating over the first surface of the substrate, the transparent reflecting coating reflecting one or more of the wavelengths of the electromagnetic spectrum such that solar energy incident on the transparent reflecting coating over the first surface of the substrate has a second percent of reflection of solar energy, wherein the second percent of reflection of the solar energy is greater than the first percent of reflection of the solar energy, wherein the first surface of the glass substrate is between the second surface of the glass substrate and the transparent reflecting coating.