Multifunctional photovoltaic skylight with dynamic solar heat gain coefficient and/or methods of making the same
First Claim
1. A skylight, comprising:
- first and second glass substrates arranged substantially in parallel and spaced apart from each other;
a first gap between the first and second glass substrates;
an inert gas in the gap;
a lenticular array provided along a common axis, the lenticular array comprising first and second sub-lens arrays, each sub-lens array comprising plano-convex lenses, the first and second sub-lens arrays being laminated to one another via laminating material comprising polyvinyl butyral (PVB) such that the planar sides of the first and second sub-lens arrays are adjacent to one another and contact the laminating material; and
the second glass substrate supporting a plurality of generally elongate solar cell strips,wherein the lenticular array and the glass substrates are oriented relative to one another such that the skylight has different solar heat gain coefficients (SHGCs) at the same time of day during at least first and second times of the year, respectively, and wherein the lenticular array and the second substrate are movable with respect to one another, as between at least first and second predefined positions, each said predefined position having an associated SHGC.
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Accused Products
Abstract
Improved building-integrated photovoltaic systems according to certain example embodiments may include concentrated photovoltaic skylights or other windows having a cylindrical lens array. The skylight may include an insulated glass unit, which may improve the Solar Heat Gain Coefficient (SHGC). The photovoltaic skylight and lens arrays may be used in combination with strip solar cells. Arrangements that involve lateral displacement tracking systems, or static systems (e.g., that are fixed at one, two, or more predefined positions) are contemplated herein. Such techniques may advantageously help to reduce cost per watt related, in part, to the potentially reduced amount of semiconductor material to be used for such example embodiments. A photovoltaic skylight may permit diffuse daylight to pass through into an interior of a building so as to provide lighting inside the building, while the strip solar cells absorb the direct sunlight and convert it to electricity, providing for SHGC tuning.
60 Citations
17 Claims
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1. A skylight, comprising:
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first and second glass substrates arranged substantially in parallel and spaced apart from each other; a first gap between the first and second glass substrates; an inert gas in the gap; a lenticular array provided along a common axis, the lenticular array comprising first and second sub-lens arrays, each sub-lens array comprising plano-convex lenses, the first and second sub-lens arrays being laminated to one another via laminating material comprising polyvinyl butyral (PVB) such that the planar sides of the first and second sub-lens arrays are adjacent to one another and contact the laminating material; and the second glass substrate supporting a plurality of generally elongate solar cell strips, wherein the lenticular array and the glass substrates are oriented relative to one another such that the skylight has different solar heat gain coefficients (SHGCs) at the same time of day during at least first and second times of the year, respectively, and wherein the lenticular array and the second substrate are movable with respect to one another, as between at least first and second predefined positions, each said predefined position having an associated SHGC. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A building integrated photovoltaic (BIPV) product, comprising:
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first and second glass substrates arranged substantially in parallel and spaced apart from each other; a first gap between the first and second substrates; an inert gas in the first gap; a lenticular array comprising first and second sub-lens arrays, each sub-lens array comprising plano-convex lenses, the first and second sub-lens arrays being laminated to one another via laminating material comprising polyvinyl butyral (PVB) such that the planar sides of the first and second sub-lens arrays are adjacent to one another and each of the planar sides contacting the laminating material; and the second substrate supporting a plurality of generally elongate solar cell strips, wherein the lenticular array and the substrates are oriented relative to one another and configured such that the product has different solar heat gain coefficients (SHGCs) at the same time of day during at least first and second times of the year, respectively, and such that different amounts of direct sunlight impinge upon the solar cell strips at the first and second times of the year, and wherein the lenticular array and the second substrate are movable with respect to one another, as between at least first and second predefined positions, each said predefined position having an associated SHGC. - View Dependent Claims (15, 16, 17)
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Specification