Photovoltaic roofing elements and roofs using them

Details Photovoltaic roofing elements and roofs using them Photovoltaic roofing elements and roofs using them

H - Electricity

01

L

H01L 31/042 (2006.01) H01L 31/048 (2006.01)

Patent

CA 2705095

The present invention relates generally to photovoltaic devices. The present invention relates more particularly to photovoltaic roofing products in which a photovoltaic element is affixed to a roofing substrate. In one embodiment, the present invention provides a photovoltaic roofing element comprising a roofing substrate having a solar reflectivity of greater than 0.25, and one or more photovoltaic elements affixed to the roofing substrate. In another embodiment, the present invention provides a photovoltaic roofing element comprising a roofing substrate comprising a bituminous substrate, and a plurality of colored roofing granules disposed on the bituminous substrate, the roofing substrate having color within the color space of CIE Lab coordinates L* in the range of about 20 to about 20, a* in the range of about -5 to about 5, and b* in the range of -15 to about -5; and one or more photovoltaic elements affixed to the roofing substrate.

La présente invention concerne globalement des dispositifs photovoltaïques et plus particulièrement des produits photovoltaïques pour toiture dans lesquels un élément est fixé à un substrat de toiture. Dans un mode de réalisation, cette invention porte sur un élément photovoltaïque de toiture qui comprend un substrat de toiture ayant une réflectivité solaire supérieure à 0,25 et un ou plusieurs éléments photovoltaïques fixés sur le substrat de toiture. Dans un autre mode de réalisation, cette invention porte sur un élément photovoltaïque de toiture qui comprend un substrat de toiture comprenant un substrat bitumineux et une pluralité de granulés de substrat de toiture d'une couleur située dans l'espace chromatique des coordonnées CIE Lab, L* dans la plage comprise entre environ 20 et environ 20, a* dans la plage comprise entre environ -5 et environ 5, et b* dans la plage comprise entre -15 et environ -5; et un ou plusieurs éléments photovoltaïques fixés sur le substrat de toiture.

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