ABSTRACT
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.
Description
CROSS-REFERENCES TO RELATED APPLICATIONS
This application is a continuation-in-part of U.S. application Ser. No. 13/477,400 filed May 22, 2012, which in turn is a continuation-in-part of U.S. application Ser. No. 12/662,624 filed Apr. 26, 2010, the entire contents of which are hereby incorporated herein by reference.
FIELD OF THE INVENTION
Certain example embodiments of this invention relate to improved solar photovoltaic systems, and/or methods of making the same. More particularly, certain example embodiments of this invention relate to building-integrated photovoltaic systems including concentrated photovoltaic skylights having a cylindrical lens array, and/or methods of making the same.
BACKGROUND AND SUMMARY OF EXAMPLE EMBODIMENTS OF THE INVENTION
Photovoltaic devices are known in the art (e.g., see U.S. Pat. Nos. 6,784,361, 6,288,325, 6,613,603, and 6,123,824, the disclosures of which are hereby incorporated herein by reference). Some conventional mainstream photovoltaic modules use a large number of crystalline silicon (c-Si) wafers. The inclusion of the large number of c-Si wafers tends to dominate the cost of the overall photovoltaic module. Indeed, about 60% of the costs involved in the production of conventional photovoltaic modules is related to the c-Si solar cells. To address this issue, concentrated photovoltaic (CPV) systems have been proposed, in which the sunlight is to be focused with concentration ratios of 100Ã to 1000Ã. Calculations suggest that a concentration ratio of approximately 10Ã should enable a photovoltaic system to be produced that uses at least 90% less silicon material.
Unfortunately, however, current concentrated photovoltaic systems use expensive high efficiency multi-junction solar cells, expensive dual-axis tracking systems, and/or relatively expensive concentrating optics. Therefore, these systems have difficulty competing with other photovoltaic solutions on a cost per watt basis.
Thus, it will be appreciated there is a need in the art for a simple low-cost CPV systems, together with low cost solar cells and low-cost concentrating optics, and/or methods of making the same.
One aspect of certain example embodiments relates to a patterned glass cylindrical lens array, and/or methods of making the same.
Another aspect of certain example embodiments relates to using such a cylindrical lens array to focus light on substantially elongate or strip solar cells.
Another aspect of certain example embodiments relates to lateral displacement tracking systems, and/or methods of making and/or using the same.
Still another aspect of certain example embodiments relates to a static or semi-static system, where the assembly is either fixed or adjustable to two or more predefined locations, e.g., to take into account seasonal and/or other variations in the solar elevation angle.
Still another aspect of certain example embodiments relates to the design of a system, where the assembly is either fixed or adjustable to two or more predefined locations, e.g., to tune the Solar Heat Gain Coefficient or SHGC (for instance, to balance heating and/or cooling, lighting, and/or other issues, potentially on a seasonal basis).
Further aspects of certain example embodiments relate to building-integrated photovoltaic systems, which may include insulating glass units comprising cylindrical lens arrays and strip solar cells. In certain examples, the photovoltaic system may be integrated into a building as an insulated glass skylight.
In certain example embodiments, a building-integrated photovoltaic (BIPV) system (e.g., photovoltaic skylight) may be provided on the roof of a building and/or other suitable structure. In certain example instances, the photovoltaic skylight may be installed on a roof at latitude tilts and may transmit diffuse daylight into the interior of the building, while converting direct sunlight into electricity at a relatively high efficiency.
In certain example embodiments of this invention, a skylight is provided. A plurality of solar cells is supported by a substrate. A lens array comprises a plurality of lenses oriented along a common cylindrical axis that is substantially parallel to the ground. Each said lens is configured to concentrate light on the solar cells, and the lens array is spaced apart from the substrate supporting the solar cells such that a gap is defined between the lens array and the substrate and such that the lens array and the solar cells remain in fixed position relative to one another.
In certain example embodiments of this invention, a skylight is provided. A plurality of solar cells is supported by a substrate. A lens array comprising a plurality of lenses is oriented along a common axis. Each said lens is configured to concentrate light on the solar cells, and the lens array is spaced apart from the substrate supporting the solar cells such that a gap is defined between the lens array and the substrate. The lens array and the solar cells are movable relative to one another as between at least first and second predefined positions.
Similar windows, BIPV devices, and/or other products also are contemplated herein. Such products may be used, for instance, in commercial and/or residential settings.
In certain example embodiments of this invention, a method of making a building integrated photovoltaic device is provided. The method may include, for example, providing a substrate supporting a plurality of generally elongate solar cells; providing a lens array comprising a plurality of lenses oriented along a common cylindrical axis; and connecting the substrate and the lens array in spaced apart but fixed relation to one another so that the cylindrical axis is substantially parallel to the ground, and so that each said lens is configured to concentrate light on the solar cells.
In certain example embodiments of this invention, a method of making a building integrated photovoltaic device is provided. The method may include, for example, providing a substrate supporting a plurality of generally elongate solar cells; providing a lens array comprising a plurality of lenses oriented along a common axis; and connecting the substrate and the lens array in spaced apart relation to one another, so that each said lens is configured to concentrate light on the solar cells. The lens array and/or the solar cells are movable relative to one another as between at least first and second predefined positions.
Corresponding methods of making skylights, BIPV devices, windows, and/or the like also are contemplated herein. For instance, a building integrated photovoltaic device made in accordance with such methods may be built into a window, skylight, etc.
In certain example embodiments of this invention, a skylight is provided. A lenticular array is provided along a common axis. A substrate supports a plurality of generally elongate solar cell strips. The lenticular array and the substrate are oriented relative to one another such that the skylight has different solar heat gain coefficients (SHGCs) during at least first and second times of the year, respectively.
The same or similar structure may be used in connection with a BIPV product, window, and/or the like, e.g., in commercial and/or residential applications. For example, in certain example embodiments of this invention, a building integrated photovoltaic (BIPV) product is provided. An array of lenses is provided along a common axis. A substrate supports a plurality of generally elongate solar cell strips. The array of lenses and the substrate are oriented relative to one another such that the skylight has different solar heat gain coefficients (SHGCs) during at least first and second times of the year, respectively. The different SHGCs are at least partially controlled by designing the skylight such that different amounts of direct sunlight impinge upon the solar cell strips at corresponding times of the year.
In a similar vein, methods of making the same or similar structure may be provided, e.g., in connection with a skylight, BIPV product, window, and/or the like, e.g., in commercial and/or residential applications. For instance, in certain example embodiments of this invention, a method of making a window is provided. The method may comprise building a building integrated photovoltaic (BIPV) product made in accordance with the methods described herein into a window.
In certain example embodiments, the BIPV system may include a photovoltaic skylight. In some cases, the photovoltaic skylight may comprise an insulated glass unit (IGU).
The features, aspects, advantages, and example embodiments described herein may be combined to realize yet further embodiments.
BRIEF DESCRIPTION OF THE DRAWINGS
These and other features and advantages may be better and more completely understood by reference to the following detailed description of exemplary illustrative embodiments in conjunction with the drawings, of which:
FIG. 1 is an illustrative linear focusing concentrating photovoltaic system including a cylindrical lens array made from patterned glass according to an example embodiment;
FIG. 2 is a schematic view of illustrative top and bottom roller profiles that may be used in a patterning line to obtain the lens array of certain example embodiments;
FIG. 3 shows example dimensions of lenses in a lens array in accordance with an example embodiment;
FIG. 4 is a graph showing the approximate cost per watt vs. concentration ratio (CR) of various different concentrating photovoltaic systems;
FIG. 5 is a schematic view of an illustrative one-axis tracking system incorporating concentrating lens arrays in accordance with an example embodiment;
FIG. 6 is a schematic view of two plano-convex arrays being laminated together in accordance with an example embodiment;
FIG. 7 is a schematic view of a Fresnel-type lens array in accordance with an example embodiment;
FIG. 8 is a hybrid thermal solar panel system that incorporates a lens array and strip solar cells in accordance with an example embodiment;
FIG. 9 is an illustrative system that incorporates a patterned mirror array and strip solar cells in accordance with an example embodiment;
FIG. 10 is a flowchart showing an example method of making a photovoltaic system in accordance with an example embodiment;
FIG. 11 illustrates a perspective view of a photovoltaic skylight comprising strip solar cells capable of lateral movement based on the position of the sun, according to certain example embodiments;
FIG. 12 is an example cross-sectional view of a dual glazing insulated glass photovoltaic skylight system in accordance with certain example embodiments;
FIG. 13 illustrates an example embodiment of a triple glazing insulated glass photovoltaic skylight system in accordance with certain example embodiments;
FIGS. 14( a )-( d ) illustrate how measurements can be taken from reference cylindrical lens(es);
FIGS. 15( a )-( c ) illustrate an AR coating disposed on a lenticular array according to certain example embodiments;
FIG. 16 illustrates certain example photovoltaic skylights installed at a latitude tilt, facing the equator;
FIGS. 17( a )-( e ) show, schematically, a view of an example multifunctional BIPV concentrating solar photovoltaic skylight in accordance with certain example embodiments;
FIGS. 18( a )-18( b ) are ray tracing models of a cylindrical lens and PV cell in accordance with the FIG. 11 embodiment, under normal incidence of the sun and under a 30 degree incidence of the sun, respectively;
FIG. 19 is a static photovoltaic skylight with a lens array oriented horizontally, and where the cylindrical axis of the lens array is parallel to the ground, in accordance with certain example embodiments;
FIG. 20 is an example ray tracing model of the FIG. 19 cylindrical lens and photovoltaic cell under normal incidence of the sun;
FIG. 21 , which is a graph plotting the solar elevation angle vs. time at +40 degrees at 12 μm;
FIGS. 22( a )-22( b ) are semi-static photovoltaic windows in which the position of the photovoltaic array is seasonally or otherwise adjusted (e.g., manually or automatically) in different orientation installations in a façade, in accordance with certain example embodiments; and
FIGS. 23( a )-23( b ) schematically demonstrate SHGC tuning principles in accordance with certain example embodiments.
DETAILED DESCRIPTION OF EXAMPLE EMBODIMENTS OF THE INVENTION
Photovoltaic devices such as solar cells convert solar radiation into usable electrical energy. The energy conversion occurs typically as the result of the photovoltaic effect. Solar radiation (e.g., sunlight) impinging on a photovoltaic device and absorbed by an active region of semiconductor material generates electron-hole pairs in the active region.
Certain example embodiments of this invention relate to patterned glass that can be used as a cylindrical lens array in a concentrated photovoltaic application, and/or methods of making the same. In certain example embodiments, the lens arrays may be used in combination with strip solar cells and lateral displacement tracking systems. That is, in certain example embodiments, lenses in the lens array may be arranged so as to concentrate incident light onto respective strip solar cells, and the solar cell substrate is controlled a lateral displacement tracking system that is programmed to follow the East-West movement of the sun. A low-iron glass may be used in connection with certain example embodiments. 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.
As indicated above, certain example embodiments relate to patterned glass cylindrical lens arrays, and/or methods of making the same. In this regard, FI
CROSS-REFERENCES TO RELATED APPLICATIONS
This application is a continuation-in-part of U.S. application Ser. No. 13/477,400 filed May 22, 2012, which in turn is a continuation-in-part of U.S. application Ser. No. 12/662,624 filed Apr. 26, 2010, the entire contents of which are hereby incorporated herein by reference.
FIELD OF THE INVENTION
Certain example embodiments of this invention relate to improved solar photovoltaic systems, and/or methods of making the same. More particularly, certain example embodiments of this invention relate to building-integrated photovoltaic systems including concentrated photovoltaic skylights having a cylindrical lens array, and/or methods of making the same.
BACKGROUND AND SUMMARY OF EXAMPLE EMBODIMENTS OF THE INVENTION
Photovoltaic devices are known in the art (e.g., see U.S. Pat. Nos. 6,784,361, 6,288,325, 6,613,603, and 6,123,824, the disclosures of which are hereby incorporated herein by reference). Some conventional mainstream photovoltaic modules use a large number of crystalline silicon (c-Si) wafers. The inclusion of the large number of c-Si wafers tends to dominate the cost of the overall photovoltaic module. Indeed, about 60% of the costs involved in the production of conventional photovoltaic modules is related to the c-Si solar cells. To address this issue, concentrated photovoltaic (CPV) systems have been proposed, in which the sunlight is to be focused with concentration ratios of 100Ã to 1000Ã. Calculations suggest that a concentration ratio of approximately 10Ã should enable a photovoltaic system to be produced that uses at least 90% less silicon material.
Unfortunately, however, current concentrated photovoltaic systems use expensive high efficiency multi-junction solar cells, expensive dual-axis tracking systems, and/or relatively expensive concentrating optics. Therefore, these systems have difficulty competing with other photovoltaic solutions on a cost per watt basis.
Thus, it will be appreciated there is a need in the art for a simple low-cost CPV systems, together with low cost solar cells and low-cost concentrating optics, and/or methods of making the same.
One aspect of certain example embodiments relates to a patterned glass cylindrical lens array, and/or methods of making the same.
Another aspect of certain example embodiments relates to using such a cylindrical lens array to focus light on substantially elongate or strip solar cells.
Another aspect of certain example embodiments relates to lateral displacement tracking systems, and/or methods of making and/or using the same.
Still another aspect of certain example embodiments relates to a static or semi-static system, where the assembly is either fixed or adjustable to two or more predefined locations, e.g., to take into account seasonal and/or other variations in the solar elevation angle.
Still another aspect of certain example embodiments relates to the design of a system, where the assembly is either fixed or adjustable to two or more predefined locations, e.g., to tune the Solar Heat Gain Coefficient or SHGC (for instance, to balance heating and/or cooling, lighting, and/or other issues, potentially on a seasonal basis).
Further aspects of certain example embodiments relate to building-integrated photovoltaic systems, which may include insulating glass units comprising cylindrical lens arrays and strip solar cells. In certain examples, the photovoltaic system may be integrated into a building as an insulated glass skylight.
In certain example embodiments, a building-integrated photovoltaic (BIPV) system (e.g., photovoltaic skylight) may be provided on the roof of a building and/or other suitable structure. In certain example instances, the photovoltaic skylight may be installed on a roof at latitude tilts and may transmit diffuse daylight into the interior of the building, while converting direct sunlight into electricity at a relatively high efficiency.
In certain example embodiments of this invention, a skylight is provided. A plurality of solar cells is supported by a substrate. A lens array comprises a plurality of lenses oriented along a common cylindrical axis that is substantially parallel to the ground. Each said lens is configured to concentrate light on the solar cells, and the lens array is spaced apart from the substrate supporting the solar cells such that a gap is defined between the lens array and the substrate and such that the lens array and the solar cells remain in fixed position relative to one another.
In certain example embodiments of this invention, a skylight is provided. A plurality of solar cells is supported by a substrate. A lens array comprising a plurality of lenses is oriented along a common axis. Each said lens is configured to concentrate light on the solar cells, and the lens array is spaced apart from the substrate supporting the solar cells such that a gap is defined between the lens array and the substrate. The lens array and the solar cells are movable relative to one another as between at least first and second predefined positions.
Similar windows, BIPV devices, and/or other products also are contemplated herein. Such products may be used, for instance, in commercial and/or residential settings.
In certain example embodiments of this invention, a method of making a building integrated photovoltaic device is provided. The method may include, for example, providing a substrate supporting a plurality of generally elongate solar cells; providing a lens array comprising a plurality of lenses oriented along a common cylindrical axis; and connecting the substrate and the lens array in spaced apart but fixed relation to one another so that the cylindrical axis is substantially parallel to the ground, and so that each said lens is configured to concentrate light on the solar cells.
In certain example embodiments of this invention, a method of making a building integrated photovoltaic device is provided. The method may include, for example, providing a substrate supporting a plurality of generally elongate solar cells; providing a lens array comprising a plurality of lenses oriented along a common axis; and connecting the substrate and the lens array in spaced apart relation to one another, so that each said lens is configured to concentrate light on the solar cells. The lens array and/or the solar cells are movable relative to one another as between at least first and second predefined positions.
Corresponding methods of making skylights, BIPV devices, windows, and/or the like also are contemplated herein. For instance, a building integrated photovoltaic device made in accordance with such methods may be built into a window, skylight, etc.
In certain example embodiments of this invention, a skylight is provided. A lenticular array is provided along a common axis. A substrate supports a plurality of generally elongate solar cell strips. The lenticular array and the substrate are oriented relative to one another such that the skylight has different solar heat gain coefficients (SHGCs) during at least first and second times of the year, respectively.
The same or similar structure may be used in connection with a BIPV product, window, and/or the like, e.g., in commercial and/or residential applications. For example, in certain example embodiments of this invention, a building integrated photovoltaic (BIPV) product is provided. An array of lenses is provided along a common axis. A substrate supports a plurality of generally elongate solar cell strips. The array of lenses and the substrate are oriented relative to one another such that the skylight has different solar heat gain coefficients (SHGCs) during at least first and second times of the year, respectively. The different SHGCs are at least partially controlled by designing the skylight such that different amounts of direct sunlight impinge upon the solar cell strips at corresponding times of the year.
In a similar vein, methods of making the same or similar structure may be provided, e.g., in connection with a skylight, BIPV product, window, and/or the like, e.g., in commercial and/or residential applications. For instance, in certain example embodiments of this invention, a method of making a window is provided. The method may comprise building a building integrated photovoltaic (BIPV) product made in accordance with the methods described herein into a window.
In certain example embodiments, the BIPV system may include a photovoltaic skylight. In some cases, the photovoltaic skylight may comprise an insulated glass unit (IGU).
The features, aspects, advantages, and example embodiments described herein may be combined to realize yet further embodiments.
BRIEF DESCRIPTION OF THE DRAWINGS
These and other features and advantages may be better and more completely understood by reference to the following detailed description of exemplary illustrative embodiments in conjunction with the drawings, of which:
FIG. 1 is an illustrative linear focusing concentrating photovoltaic system including a cylindrical lens array made from patterned glass according to an example embodiment;
FIG. 2 is a schematic view of illustrative top and bottom roller profiles that may be used in a patterning line to obtain the lens array of certain example embodiments;
FIG. 3 shows example dimensions of lenses in a lens array in accordance with an example embodiment;
FIG. 4 is a graph showing the approximate cost per watt vs. concentration ratio (CR) of various different concentrating photovoltaic systems;
FIG. 5 is a schematic view of an illustrative one-axis tracking system incorporating concentrating lens arrays in accordance with an example embodiment;
FIG. 6 is a schematic view of two plano-convex arrays being laminated together in accordance with an example embodiment;
FIG. 7 is a schematic view of a Fresnel-type lens array in accordance with an example embodiment;
FIG. 8 is a hybrid thermal solar panel system that incorporates a lens array and strip solar cells in accordance with an example embodiment;
FIG. 9 is an illustrative system that incorporates a patterned mirror array and strip solar cells in accordance with an example embodiment;
FIG. 10 is a flowchart showing an example method of making a photovoltaic system in accordance with an example embodiment;
FIG. 11 illustrates a perspective view of a photovoltaic skylight comprising strip solar cells capable of lateral movement based on the position of the sun, according to certain example embodiments;
FIG. 12 is an example cross-sectional view of a dual glazing insulated glass photovoltaic skylight system in accordance with certain example embodiments;
FIG. 13 illustrates an example embodiment of a triple glazing insulated glass photovoltaic skylight system in accordance with certain example embodiments;
FIGS. 14( a )-( d ) illustrate how measurements can be taken from reference cylindrical lens(es);
FIGS. 15( a )-( c ) illustrate an AR coating disposed on a lenticular array according to certain example embodiments;
FIG. 16 illustrates certain example photovoltaic skylights installed at a latitude tilt, facing the equator;
FIGS. 17( a )-( e ) show, schematically, a view of an example multifunctional BIPV concentrating solar photovoltaic skylight in accordance with certain example embodiments;
FIGS. 18( a )-18( b ) are ray tracing models of a cylindrical lens and PV cell in accordance with the FIG. 11 embodiment, under normal incidence of the sun and under a 30 degree incidence of the sun, respectively;
FIG. 19 is a static photovoltaic skylight with a lens array oriented horizontally, and where the cylindrical axis of the lens array is parallel to the ground, in accordance with certain example embodiments;
FIG. 20 is an example ray tracing model of the FIG. 19 cylindrical lens and photovoltaic cell under normal incidence of the sun;
FIG. 21 , which is a graph plotting the solar elevation angle vs. time at +40 degrees at 12 μm;
FIGS. 22( a )-22( b ) are semi-static photovoltaic windows in which the position of the photovoltaic array is seasonally or otherwise adjusted (e.g., manually or automatically) in different orientation installations in a façade, in accordance with certain example embodiments; and
FIGS. 23( a )-23( b ) schematically demonstrate SHGC tuning principles in accordance with certain example embodiments.
DETAILED DESCRIPTION OF EXAMPLE EMBODIMENTS OF THE INVENTION
Photovoltaic devices such as solar cells convert solar radiation into usable electrical energy. The energy conversion occurs typically as the result of the photovoltaic effect. Solar radiation (e.g., sunlight) impinging on a photovoltaic device and absorbed by an active region of semiconductor material generates electron-hole pairs in the active region.
Certain example embodiments of this invention relate to patterned glass that can be used as a cylindrical lens array in a concentrated photovoltaic application, and/or methods of making the same. In certain example embodiments, the lens arrays may be used in combination with strip solar cells and lateral displacement tracking systems. That is, in certain example embodiments, lenses in the lens array may be arranged so as to concentrate incident light onto respective strip solar cells, and the solar cell substrate is controlled a lateral displacement tracking system that is programmed to follow the East-West movement of the sun. A low-iron glass may be used in connection with certain example embodiments. 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.
As indicated above, certain example embodiments relate to patterned glass cylindrical lens arrays, and/or methods of making the same. In this regard, FIG. 1 is an illustrative linear focusing concentrating photovoltaic system including a substantially cylindrical lens array made from patterned glass according to an example embodiment. A large flat low iron glass plate is modified into a lens array 1 by periodically modifying its thickness, e.g., at regular intervals. The lenses 3 a - 3 d in the lens array 1 focus the sunlight from the sun in substantially one dimension, with a concentration ratio of, for example, 3Ã to 30Ã. The solar radiation may be focused on, for example, c-Si solar cells, with an efficiency of as high as 20%. Such c-Si solar cells are commercially available at reasonable costs. FIG. 1 shows the c-Si solar cells being formed as strips 5 a - 5 d . Further details regarding these strip solar cells 5 a - 5 d are provided below. In any event, the c-Si solar cells may be provided on a transparent substrate in different embodiments of this invention. The lenses 3 a - 3 d in the lens array 1 are provided substantially in-line along a common axis. The lenses 3 a - 3 d may be formed from a single piece of glass in certain example embodiments. In such cases, the lenses 3 a - 3 d may effectively be connected to one another by virtue of being formed from a common glass substrate. Alternatively or in addition, multiple lenses and/or lens arrays may be provided adjacent to one another in different example embodiments of this invention.
A patterning line in a glass factory may be used to create the large area cylindrical lens array of certain example embodiments. This can be done by using one or more sets of top and bottom rollers with the example profile shown in FIG. 2 . That is, FIG. 2 is a schematic view of illustrative top and bottom roller profiles that may be used in a patterning line to obtain the lens array of certain example embodiments. When viewed in cross-section, the individual top and bottom rollers 7 a - 7 d and 9 a - 9 d in the top and bottom roller arrays 7 and 9 are concave at the top and bottom. Thus, the rollers of FIG. 2 will lead to a convex-convex lens array. Of course, it will be appreciated that a plano-convex lens array may be obtained, as well, when either the top of bottom set of rollers is flat. Other lens configurations are of course possible in different example embodiments.
FIG. 3 shows example dimensions of lenses in a lens array in accordance with an example embodiment. Each lens in the FIG. 3 example has a pitch or width that ranges from approximately 5-100 mm, a minimum thickness or height from about 2-4 mm, and a maximum thickness or height of about 4-8 mm. Depending on the pitch, the focal length will be about 10-200 mm, e.g., from or proximate to the center of the individual lenses. Of course, it will be appreciated that the dimensions specified in FIG. 3 are provided by way of example. Indeed, different embodiments of this invention may include differently sized, shaped, and/or focal length lenses. For instance, the minimum thickness or height of certain example embodiments may be about 2 mm and the maximum thickness or height of certain example embodiments may be about 8 mm. In certain example embodiments, a 1 m 2 module may comprise about 10-200 lenses. The FIG. 3 example has a width of 25 mm, a minimum thickness of 3 mm, and a maximum thickness of 4 mm. These dimensions imply a height difference of 1 mm and 40 lenses per 1 m 2 module. In example instances, the focal length will be 150 mm, and the lens-solar cell distance may be placed at 135 mm to achieve a concentration ratio of about 10. Placing the solar cell closer to the focal point may be advantageous in certain example instances so that light is concentrated on a larger area of the solar cell.
Any suitable transparent substrate may be used in connection with certain example embodiments of this invention. For instance, certain example embodiments may incorporate a low-iron glass substrate, e.g., to help ensure that as much red and near-IR light as possible is transferred to the semiconductor absorber layer. Example low-iron glass substrates are disclosed, for example, in co-pending and commonly assigned U.S. Pat. Nos. 7,893,350; 7,700,870; and 7,700,869; and U.S. Publication Nos. 2010/0255980; 2010/0122728; 2009/0223252; and 2007/02152051, the entire contents of each of which are hereby incorporated herein by reference.
For instance, certain example embodiments may incorporate a high transmission low iron glass. Further details of example low iron glass are provided below.
In addition, the low iron glass may be thermally tempered. Such tempering may occur in certain example embodiments at the end of the production line, e.g., after the glass has been patterned in certain example instances.
Current CPV systems typically implement two-axis tracking because they use two-dimensional focusing. In this regard, current CPV systems usually are mounted on poles with individual tracking for each unit system. This arrangement increases the cost of the system. By contrast, certain example embodiments that implement cylindrical lens arrays reduce (and sometimes completely eliminate) the need for dual-axis tracking. This is because the cylindrical lens arrays of certain example embodiments are configured to linearly focus sunlight on or along a strip as opposed to a smaller point or spot location. Indeed, when the cylindrical lenses of certain example embodiments are oriented substantially vertically, simple East-West one-axis tracking may be implemented easily and efficiently.
In Table 1 the annual energy outputs from a 20% efficient system at an example location (Phoenix, Ariz.) are compared for fixed latitude tilt, one-axis tracking, and two-axis tracking systems. More particularly, the solar cells are high efficiency, back contact solar cell strips commercially available from Sunpower. The improvement in energy output going from a fixed orientation system to a one-axis tracking system is 30.7%. This is a very significant gain. However, the improvement of moving from a one-axis tracking system to a dual-axis tracking system is only an additional 5.8%. This additional 5.8% energy gain typically is offset by the expense of the dual-axis tracking system itself. Current dual-axis tracking systems therefore are not seen as economical. In any event, certain example embodiments that implement a linearly focused system are able to realize at least the efficiency gains associated with moving from a single-axis tracking system to dual-axis tracking system without actually having to incur the expenses associated with the dual-axis tracking system because such embodiments may be implemented with only one-axis tracking systems.
TABLE 1
Annual energy output per m 2 incident sunlight for fixed
orientation, one-axis tracking, and two-axis tracking
systems in Phoenix (based on NREL PVWatts Calculator)
Annual energy generation
(kWh/m 2 /yr)
Fixed
One-
orientation
axis
Two-
PV
Conversion
(On roof)
E-W
axis
technology
Efficiency
Lat. tilt
tracking
tracking
Phoenix
High eff.
20%
386.53
505.52
534.80
c-Si
33° 43° N
~100%
~131%
~138%
It will be appreciated that single-axis tracking systems advantageously can be implemented at low cost, because many modules can be oriented with a single actuator by connecting all modules to each other through parallel beams. The lens array is oriented substantially vertically and is therefore largely self-cleaning, as rain will flow down in the grooves of the patterned glass and reduce the amount of dust accumulation. Additional periodic cleaning optionally may be implemented, of course. Single-axis tracking systems also may be low to the ground, as the mechanisms for moving it are simplified compared to the mechanisms used for two-axis tracking systems.
The solar cells in the FIG. 1 example system may be manufactured economically, e.g., by cleaving strips from c-Si solar cells. For instance, a larger (e.g., 4 inch to 12 inch) wafer may be formed and subsequently cleaved to produce a plurality of strips. For concentration ratios of 3Ã to 30Ã, only about 33% to 3.3% silicon is needed, as compared to conventional c-Si modules without concentration which may require higher amounts of silicon.
As alluded to above and as suggested in the use of the term âstripâ itself, the strip solar cells of certain example embodiments may have a substantially elongated shape. For instance, certain example strip solar cells may be 2 mmÃ150 mm, although other dimensions and/or shapes also are possible. In any event, the strip solar cells may be cleaved along the direction of its crystal orientation. The strip cells optionally may be mounted on a second glass substrate or another type of substrate in certain example embodiments. In so doing, the second substrate may be made to function as a heat sink, thereby helping to keep the operating temperature of the solar cells low and their efficiency high. Active cooling may be used in place of, or in addition to, such heat sink techniques in certain example embodiments.
In connection with example embodiments that implement strip solar cells, low-cost assembly techniques known and commonly used in, for example, the flat panel display (FPD) industry, may be used. For example, such techniques may readily be used in connection with strip solar cells having a width of 2-20 mm, and such techniques may include, for example, chip on glass (COG) manufacturing. These COG manufacturing techniques may, in turn, incorporate interconnecting wires such as, for example, patterned metals provided on the glass, copper tape, and/or the like. Certain example embodiments may incorporate solar cells with low shading or non-shading interconnects. Non-shading interconnects sometimes are used, for example, in back contact solar cells (e.g., available from Sunpower).
FIG. 4 is a graph showing the approximate cost per watt vs. concentration ratio (CR) of various different concentrating photovoltaic systems. The FIG. 4 graph is based on the following assumptions. For CRs greater than 100, expensive multi-junction GaAs cells need to be used with active cooling. For CRs greater than 100, two-dimensional concentration is needed with dual-axis tracking. For CR less than 100, one-dimensional (e.g., cylindrical) concentration is used along with single-axis tracking. The cost per watt for the solar cell includes costs associated with packaging and interconnects, and the cost per watt for the concentrating optics includes costs associated with alignment. The FIG. 4 graph allows efficiency to exceed 20%. As will be appreciated from the FIG. 4 graph, a concentration ratio of about 10-30Ã is particularly desirable from a cost per watt perspective.
It will be appreciated that there are a number of advantages associated with certain example embodiments of this invention. For example, the 3Ã to 30Ã concentration optics may be produced easily and inexpensively using patterned glass. This may, in turn, also allow for a 3Ã to 30Ã smaller area of c-Si solar cells. Cylindrical lens arrays may be substantially self-cleaning when installed vertically at a latitude tilt in certain example implementations, as the amount of dust and/or other debris that will accumulate will be reduced, since rain will clean the grooves of the vertically positioned patterned glass lens array. Certain example embodiments also enable low cost and known, reliable assembly techniques from the FPD industry to be used in connection with strip solar cells (e.g., when they are provided with a width of about 2-20 mm). Also, as noted above, the use of low-cost single-axis tracking or lateral displacement systems may in certain example embodiments advantageously improve power output as compared to fixed orientation systems. Furthermore, many modules may be easily connected to the same single-axis tracking system. The use of such example techniques in high direct-insolation areas such as the Southwest USA may lead to higher annual energy output.
FIG. 5 is a schematic view of an illustrative one-axis tracking system incorporating concentrating lens arrays in accordance with an example embodiment. The illustrative system in FIG. 5 includes a plurality of concentrating lens array modules 11 . Each such module 11 may be the same as or similar to the arrangement shown in FIG. 1 , for example. That is, each module may include a lens array that concentrates light on strip solar cells, e.g., of c-Si. The individual modules 11 may be connected to a common power source, e.g., using interconnects 12 . The modules 11 also may be controlled such that they move in a direction that matches the East-West movement of the sun.
In certain example embodiments, antireflective (AR) coatings may be provided to one or both sides of the lens array to increase transmission. In certain example embodiments, a broadband AR may be provided using any suitable technique. In certain example instances, a low index silicon oxide (e.g., SiO 2 or other suitable stoichiometry) coating having an index of refraction of about 1.3 may be provided on one or both sides of a lens array through a wet application process (e.g., a dip, spray, roll, or other coating process), for a sol, for example. Such a technique may lead to, for example, a 3-6% increase in lens array transmission and/or module power, depending on the coating used and the number of surfaces coated.
In certain example embodiments, the lens array may be heat strengthened and/or thermally tempered. Of course, thermal tempering may be difficult to accomplish in connection with patterned glass having varying thicknesses. Chemical tempering and/or strengthening techniques therefore may be used in connection with certain example embodiments.
As another alternative or addition, lens arrays may be laminated together, e.g., as shown in FIG. 6 , which is a schematic view of two plano-convex arrays being laminated together in accordance with an example embodiment. In FIG. 6 , first and second plano- convex arrays 13 a and 13 b are provided. The first and second plano- convex arrays 13 a and 13 b are laminated together using any suitable laminate material 15 . For instance, PVB, EVA, or the like may be used to laminate together the first and second plano- convex arrays 13 a and 13 b . The individual arrays 13 may be individually strengthened or tempered (thermally, chemically, or otherwise) in certain example instances, as the variations in thickness may be less severe and thus easier to process in comparison to convex-convex type lens arrays. In certain example instances, the laminate 15 itself may help to strengthen the overall array.
FIG. 7 is a schematic view of a Fresnel-type lens array in accordance with an example embodiment. As is known, Fresnel lenses generally have large apertures and short focal lengths, without the weight and volume of material that would be required in conventional lens design. In addition, Fresnel lenses tend to be thinner, thereby allowing more light to pass through them. The comparatively lower thickness variation may enable Fresnel lenses to be tempered. Although the example lens in FIG. 7 is patterned on both major axes, it will be appreciated that one side of the lens may be planar or substantially planar and the other side may be patterned. In certain example embodiments, such lenses having one planar side and one Fresnel patterned side may be laminated together, e.g., using the techniques and/or materials described above.
FIG. 8 is a hybrid thermal solar panel system that incorporates a lens array and strip solar cells in accordance with an example embodiment. The FIG. 8 example system is similar to the FIG. 1 example system in that it includes a lens array having a plurality of lenses 3 a - 3 d , and a plurality of strip solar cells 5 a - 5 b . Light from the sun is focused on the strip solar cells 5 a - 5 b to produce electricity. The FIG. 5 example hybrid system also includes tubing
17 a and 17 b through which water or another suitable fluid may flow. Cool water is fed into the tubing
17 a and 17 b proximate to the strip solar cells 5 a - 5 b , continues in a path (which in the FIG. 8 example embodiment is substantially U-shaped), and exits remote from the strip solar cell. Providing cool water proximate to the strip solar cells is advantageous in that it improves the efficiency of the c-Si. In this regard, it is known that the efficiency of c-Si solar cells drops significantly at higher temperatures (e.g., at 60 degrees C.) and improves at lower temperatures (e.g., at 25 degrees C.). The provision of cooler water proximate to the strip solar cells therefore may improve the operational efficiency of the system.
Although the presence of cooling water may increase efficiency of an individual strip solar cell, the overall solar cell efficiency may be decreased by providing fewer total solar cells, e.g., because a solar cell may not be provided along the return path for the hot output water. Nevertheless, overall efficiency may be improved by virtue of the cooling water's effect on the strip solar cells that are present and the further heating of the water via the lens array throughout the entire path, including the return path (where there is no solar cell). The heated water, of course, may be used as it otherwise would be used in connection with a thermal solar power application. As explained in greater detail below, the lens array and/or the tubing may move relative to one another, e.g., so as to match the East-West movement of the sun. This may be advantageous, for example, in building-integrated photovoltaic (BIPV) applications.
Focusing additionally or alternatively may be performed using a patterned mirror array. FIG. 9 is an illustrative system that incorporates a patterned mirror array and strip solar cells in accordance with an example embodiment. In FIG. 9 , strip solar cells 3 a - 3 d are provided, directly or indirectly, on a cover glass substrate 19 . For instance, the cover glass substrate 19 may be closer to the sun, and the strip solar cells 3 a - 3 d in certain example instances may be provided on a major surface of the cover glass substrate 19 opposite the sun. In certain example embodiments, the cover glass substrate may be made from low iron float glass. In certain example embodiments, an AR coating may be applied thereto. Light passing through the cover glass substrate 19 may be reflected and concentrated back towards the strip solar cells 3 a - 3 d using a mirror array 21 . The mirror array 21 may be a piece (or multiple pieces) of patterned glass that has been coated with a reflective coating. Light impinging on the troughs or concave areas 21 a - 21 d in the mirror array 21 therefore may be reflected back towards the strip solar cells 3 a - 3 d . As above, relative movement of one or both of the cover glass substrate 19 and the mirror array 21 may be caused so as to improve efficiency (e.g., by tracking the East-West movement of the sun).
Although certain examples have been described in connection with a fixed or stationary solar cell module and a moving lens array, certain other example embodiments may involve a fixed or stationary lens array and a moving solar cell module. In the latter case, the lens array may be stationary at a fixed orientation, and the solar cell array may be configured to move during the day to maintain the focus of the light from the sun on the strip solar cells, e.g., to match the East-West movement of the sun. In this regard, the strip solar cells may be provided on a substrate as described above, and the substrate may be made to move. Such example embodiments may be used, for instance, in connection with building-integrated photovoltaic applications, similar to self-regulating windows. Self-regulating windows are known to dynamically adjust the amount of light passing therethrough, e.g., using diffusers, blinds, or the like. In certain example embodiments, the movement of the sun may be tracked (directly or indirectly, e.g., based on time of day and/or day of year) so that the substrate may be moved appropriately to increase or maximize the amount of sunlight impinging on the solar cells. It will be appreciated that diffuse light may be transmitted in such instances, and direct sunlight may be converted into electricity by the photovoltaic cells.
The following table compares cost per watt for various types of photovoltaic technologies.
TABLE 2
Estimated Cost per Watt for Photovoltaic Technologies
Using Phoenix, Arizona as an Exemplary Location
Annual Power
Cost
Output per m 2
per
Efficiency
Tracking
Module Area
Watt
Polycrystalline silicon
15%
None
290 kWh
$1.40
Thin film CdTe (e.g.,
11%
None
212 kWh
$0.98
First Solar)
Example (e.g., Lens
20%
One-Axis
505 kWh
$0.85
Array)
East-West
As can be seen, the example in Table 2 produces 2.4Ã higher output per square meter as compared to CdTe type photovoltaic systems for direct sunlight. The example in Table 2 also provides a potentially lower cost/watt compared to CdTe type photovoltaic systems.
FIG. 10 is a flowchart showing an example method of making a photovoltaic system in accordance with an example embodiment. Soda lime glass (e.g., low iron glass) is patterned, optionally using a plurality of top and bottom rollers, to form a lens array comprising a plurality of lenses oriented along a common axis in step S 101 . In step S 103 , a c-Si solar cell is formed on a wafer and, the wafer is cleaved along the c-Si crystal orientation into a plurality of elongate solar cells in step S 105 . The elongate solar cell strips are provided in substantially parallel spaced apart relation to one another in step S 107 . In step S 109 , the lens array is oriented relative to the solar cells such that each said lens is arranged to concentrate light incident thereon in substantially one dimension on one respective elongate solar cell. Optionally, in a step not shown, the lens array and the plurality of elongate solar cells may be mounted to a single-axis tracking or lateral displacement system, with such a system being programmed to move so as to substantially match the East-West movement of the sun, e.g., to maximize the amount of light incident on the lens array and concentrated on the strip solar cells.
Certain example embodiments may be used as windows, skylights, roof-mounted PV modules, or the like in connection with BIPV applications. For example, in rooftop applications, full size solar cells may be replaced with strip cells. The lens array may be provided in substantially parallel spaced apart relation to the strip solar cells. Known tabbing, framing, and/or junction box technology may be leveraged to help provide BIPV applications.
It will be appreciated from the description above that certain example applications may be structured somewhat similarly to insulating glass (IG) units. The first or outer pane may be the cylindrical lens array, whereas the second or inner pane may have the strip solar cells formed thereon.
CLAIMS
Claims ( 20 )
What is claimed is:
1. A skylight, comprising:
first, second, and third substrates that are substantially parallel to each other, wherein the second substrate is located between the first and third substrates;
a plurality of solar cells supported by the second substrate;
wherein the first substrate comprises a lens array comprising a plurality of lenses, said lenses configured to concentrate light on the solar cells, the lens array being spaced apart from the second substrate supporting the solar cells such that a first gap is defined between the lens array and the second substrate and such that the first and second substrates remain a fixed distance apart; and
wherein the first gap is between the first and second substrates, and a second gap is between the second and third substrates, wherein at least one of the gaps is filled with an inert gas.
2. The skylight of claim 1 , wherein the lens array and the second substrate supporting the solar cells are positioned relative to one another such that incident angles of direct solar illumination vary in a manner that focuses all or substantially all direct solar illumination on the solar cells in a selected time period.
3. The skylight of claim 2 , wherein the selected time period is in the middle the day.
4. The skylight of claim 1 , wherein the lens array and the second substrate supporting the solar cells are positioned relative to one another such that incident angles of direct solar illumination vary over a given angle during different seasons so that all or substantially all direct solar illumination is focused on the solar cells in a selected time period.
5. The skylight of claim 4 , wherein the given angle remains substantially constant during any given day relative to the plane created by the axis of a cylindrical lens and the edge of the corresponding solar cell strip.
6. The skylight of claim 1 , wherein the solar cells are moved backwards so that they are close to focal points of respective lenses.
7. A skylight, comprising:
first, second, and third substrates that are substantially parallel to each other, wherein the second substrate is located between the first and third substrates;
a plurality of solar cells supported by the second substrate; and
wherein the first substrate comprises a lens array comprising a plurality of lenses for concentrating light on the solar cells, the lens array being spaced apart from the second substrate supporting the solar cells such that a first gap is defined between the lens array and the second substrate,
wherein the lens array and the solar cells are movable relative to one another as between at least first and second predefined positions,
wherein the first gap is between the first and second substrates, and a second gap is between the second and third substrates, wherein at least one of the gaps is filled with an inert gas.
8. The skylight of claim 7 , wherein each said position is defined so as to correspond to at least one corresponding season.
9. The skylight of claim 7 , wherein four predefined positions are provided, respective ones of the predefined positions corresponding to different seasons in the year.
10. The skylight of claim 7 , wherein 12 predefined positions are provided, respective ones of the predefined positions corresponding to different months of the year.
11. The skylight of claim 7 , wherein each said position has its own unique selected general light blocking and electricity generating characteristics.
12. The skylight of claim 7 , being substantially horizontally and/or vertically disposable on a roof.
13. The skylight of claim 7 , being orientable at a tilt selected in dependence on a latitude where the skylight is to be installed.
14. The skylight of claim 7 , further comprising means for manually moving the lens array and the solar cells relative to one another between the different predefined positions.
15. The skylight of claim 7 , further comprising a programmable controller and a motor, the programmable controller being configured to cause the motor to move the lens array and the solar cells relative to one another between the different predefined positions.
16. The skylight of claim 15 , wherein the programmable controller is configured to cause the motor to move the lens array and the solar cells relative to one another between the different predefined positions based on a date and/or a temperature reading.
17. A method of making a building integrated photovoltaic device, the method comprising:
providing first, second, and third substrates that are substantially parallel to each other, wherein the second substrate is located between the first and third substrates, the second substrate supporting a plurality of generally elongate solar cells;
the first substrate comprising a lens array comprising a plurality of lenses; and
wherein a first gap is between the first and second substrates, and a second gap is between the second and third substrates, wherein at least one of the gaps is filled with an inert gas.
18. The method of claim 17 , wherein the lens array and the second substrate supporting the solar cells are positioned relative to one another such that incident angles of direct solar illumination vary over a given angle during different lengths of time so that all or substantially all direct solar illumination is focused on the solar cells in a selected time period.
19. The method of claim 18 , wherein the selected time period is in the middle the day.
20. A method of making a skylight, the method comprising:
building a building integrated photovoltaic device made in accordance with the method of claim 17 into a skylight.
US14/035,524
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Multifunctional static or semi-static photovoltaic skylight and/or methods of making the same
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Cited By (3)
* Cited by examiner, â Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US9863149B2
( en )
*
2016-04-07
2018-01-09
Shih Hsiang WU
Functional roof construction method and arrangement
US10287775B2
( en )
*
2016-04-07
2019-05-14
Shih Hsiang WU
Functional roof construction method and arrangement
US20250054421A1
( en )
*
2022-01-03
2025-02-13
Lg Electronics Inc.
Transparent display device
Families Citing this family (25)
* Cited by examiner, â Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
CN106449805B
( en )
2009-02-09
2019-03-12
è¾å æ¯çä¹æ®æç¹æéå ¬å¸
Concentrator type photovoltaic (CPV) module, receiver and sub-receiver and method of forming the same
US9300169B1
( en )
*
2013-06-26
2016-03-29
Cameron M. D. Bardy
Automotive roof rack with integral solar cell array
FI127237B
( en )
*
2014-02-17
2018-02-15
Savo Solar Oy
Solvärmeabsorbatorelement
JP2015223040A
( en )
*
2014-05-23
2015-12-10
ä½åé»æ°å·¥æ¥æ ªå¼ä¼ç¤¾
Concentrator photovoltaic power generation system, semiconductor integrated circuit used for the same, tracking deviation detection program and tracking deviation correction program, and tracking deviation detection method and tracking deviation correction method
TWI565220B
( en )
*
2014-08-25
2017-01-01
zhong-cheng Zhang
Method and device for improving power generation efficiency of solar cell
JP2016062931A
( en )
*
2014-09-15
2016-04-25
å½ç«å¤§å¦æ³äººé·å²¡æè¡ç§å¦å¤§å¦
Condensation type solar battery module and condensation type photovoltaic power generation system
US10505059B2
( en )
2015-01-16
2019-12-10
The Arizona Board Of Regents On Behalf Of The University Of Arizona
Micro-scale concentrated photovoltaic module
WO2016141041A1
( en )
2015-03-02
2016-09-09
The Arizona Board Of Regents On Behalf Of The University Of Arizona
Glass forming mold of adjustable shape
US10686400B2
( en )
2015-06-12
2020-06-16
THE ARIZONA BOARD OR REGENTS on behalf of THE UNIVERSITY OF ARIZONA
Tandem photovoltaic module with diffractive spectral separation
WO2017024038A1
( en )
2015-08-03
2017-02-09
The Arizona Board Of Regents On Behalf Of The University Of Arizona
Solar concentrator for a tower-mounted central receiver
US10418501B2
( en )
*
2015-10-02
2019-09-17
X-Celeprint Limited
Wafer-integrated, ultra-low profile concentrated photovoltaics (CPV) for space applications
CN105532321A
( en )
*
2016-01-29
2016-05-04
滦åææµ·ç§æåå±æéè´£ä»»å ¬å¸
Agricultural-photovoltaic complementary photovoltaic module and application method thereof on agricultural greenhouse
US20170250301A1
( en )
*
2016-02-29
2017-08-31
Zafer Termanini
Solar panel with optical light enhancement device
TWI677658B
( en )
*
2019-02-21
2019-11-21
åèºå¸æ ¡è²¡åæ³äººåèºç§æ大å¸
Solar module for architecture use
US12341465B2
( en )
*
2019-07-10
2025-06-24
Alliance For Sustainable Energy, Llc
Photovoltaic devices for switchable windows
US12270630B2
( en )
2019-11-03
2025-04-08
Lasermotive, Inc
Dual-use power beaming system
US11686097B2
( en )
*
2019-11-22
2023-06-27
Arizona Board Of Regents On Behalf Of Arizona State University
Skylights with integrated photovoltaics and refractive light-steering
DE102020116295B4
( en )
2020-06-19
2022-03-17
Audi Aktiengesellschaft
Energy producing glazing for an automobile
US11543654B2
( en )
*
2020-09-16
2023-01-03
Aac Optics Solutions Pte. Ltd.
Lens module and system for producing image having lens module
EP4177968B1
( en )
*
2021-11-03
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Insolight SA
Optomechanical system to regulate light transmission and electricity production
JP7733826B2
( en )
*
2021-11-19
2025-09-03
ã¬ã¼ã¶ã¼ã¢ã¼ãã£ã ã¤ã³ã³ã¼ãã¬ã¼ããã
Dual Contrafocal Homogenizer
CN116122661A
( en )
*
2022-08-10
2023-05-16
èµéæ¾
Solar panel ceiling skylight with inner and outer slide ways
CN115394867B
( en )
*
2022-09-19
2024-01-30
æ±è润达å ä¼æ é¡æéå ¬å¸
Solar photovoltaic module
KR20250017516A
( en )
*
2023-07-27
2025-02-04
íêµê´ê¸°ì ì
Photovoltaic Power Generation Module Using a Condensing Lens with a Medium inside and Photovoltaic/Solar Thermal Power Generation System Including the Same
CN117328621B
( en )
*
2023-11-20
2024-05-03
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Waterproof assembly for photovoltaic car shed protection system
Citations (58)
* Cited by examiner, â Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3682528A
( en )
1970-09-10
1972-08-08
Optical Coating Laboratory Inc
Infra-red interference filter
US3991741A
( en )
*
1975-03-20
1976-11-16
Northrup Jr Leonard L
Roof-lens solar collector
US4002031A
( en )
*
1975-07-07
1977-01-11
Varian Associates, Inc.
Solar energy converter with waste heat engine
FR2327643A1
( en )
1975-10-09
1977-05-06
Commissariat Energie Atomique
LUMINOUS ENERGY INTO ELECTRICAL ENERGY CONVERTER
US4782216A
( en )
1987-08-11
1988-11-01
Monsanto Company
Electrically heatable laminated window
US5204777A
( en )
*
1992-01-23
1993-04-20
Sea Corporation
Energy efficient skylight and blind
US5456764A
( en )
1992-04-24
1995-10-10
Fuji Electric Co., Ltd.
Solar cell and a method for the manufacture thereof
US6123824A
( en )
1996-12-13
2000-09-26
Canon Kabushiki Kaisha
Process for producing photo-electricity generating device
US6288325B1
( en )
1998-07-14
2001-09-11
Bp Corporation North America Inc.
Producing thin film photovoltaic modules with high integrity interconnects and dual layer contacts
US6613603B1
( en )
1997-07-25
2003-09-02
Canon Kabushiki Kaisha
Photovoltaic device, process for production thereof, and zinc oxide thin film
US6686050B2
( en )
2000-07-10
2004-02-03
Guardian Industries Corp.
Heat treatable low-E coated articles and methods of making same
US6730352B2
( en )
2001-09-13
2004-05-04
Guardian Industries Corp.
Low-E matchable coated articles, and methods
US6749941B2
( en )
2002-03-14
2004-06-15
Guardian Industries Corp.
Insulating glass (IG) window unit including heat treatable coating with silicon-rich silicon nitride layer
US6782718B2
( en )
1999-12-06
2004-08-31
Guardian Industries Corp.
Method of making matchable low-E I.G units and laminates
US6784361B2
( en )
2000-09-20
2004-08-31
Bp Corporation North America Inc.
Amorphous silicon photovoltaic devices
US6802943B2
( en )
2001-11-09
2004-10-12
Guardian Industries Corp.
Coated article with improved barrier layer structure and method of making the same
US20050081908A1
( en )
*
2003-03-19
2005-04-21
Stewart Roger G.
Method and apparatus for generation of electrical power from solar energy
WO2005057092A1
( en )
2003-12-11
2005-06-23
World Energy Solutions Pty Ltd
Solar energy collection system
US6936347B2
( en )
2001-10-17
2005-08-30
Guardian Industries Corp.
Coated article with high visible transmission and low emissivity
US20060169316A1
( en )
2005-02-03
2006-08-03
Guardian Industries Corp.
Solar cell low iron patterned glass and method of making same
US20060249199A1
( en )
2005-05-05
2006-11-09
Guardian Industries Corp.
Solar cell using low iron high transmission glass with antimony and corresponding method
US20070084502A1
( en )
*
2005-10-18
2007-04-19
Kelly Nelson A
Solar photovoltaic output for cloudy conditions with a solar tracking system
US20070215205A1
( en )
2006-03-13
2007-09-20
Guardian Industries Corp.
Solar cell using low iron high transmission glass and corresponding method
WO2007143517A2
( en )
2006-06-01
2007-12-13
Solbeam, Inc.
Method and system for light ray concentration
US20090025777A1
( en )
2007-07-26
2009-01-29
Guardian Industries Corp.
Method of making an antireflective silica coating, resulting product and photovoltaic device comprising same
US20090032098A1
( en )
2007-08-03
2009-02-05
Guardian Industries Corp.
Photovoltaic device having multilayer antireflective layer supported by front substrate
WO2009020778A2
( en )
2007-08-06
2009-02-12
Solaria Corporation
Method and apparatus for manufacturing solar concentrators using glass process
US20090068474A1
( en )
2006-08-23
2009-03-12
Rockwell Collins, Inc.
Alkali silicate glass based coating and method for applying
US20090101209A1
( en )
2007-10-19
2009-04-23
Guardian Industries Corp.
Method of making an antireflective silica coating, resulting product, and photovoltaic device comprising same
US20090133748A1
( en )
2007-11-27
2009-05-28
Guardian Industries Corp.
Method of making an antireflective silica coating, resulting product, and photovoltaic device comprising same
US20090217978A1
( en )
2006-03-13
2009-09-03
Guardian Industries Corp.
Low iron transmission float glass for solar cell applications and method of making same
US20090223252A1
( en )
2008-03-06
2009-09-10
Guardian Industries Corp.
Photovoltaic device having low iron high transmission glass with lithium oxide for reducing seed free time and corresponding method
WO2009137816A2
( en )
2008-05-09
2009-11-12
Neerou Technologies, Inc.
Solar energy collection devices
WO2010010530A2
( en )
2008-07-23
2010-01-28
Solecta Ltd.
A method circuit device assembly and system for converting solar radiation into electric current
US20100122728A1
( en )
2008-11-17
2010-05-20
Fulton Kevin R
Photovoltaic device using low iron high transmission glass with antimony and reduced alkali content and corresponding method
US7767253B2
( en )
2007-03-09
2010-08-03
Guardian Industries Corp.
Method of making a photovoltaic device with antireflective coating
WO2010099620A1
( en )
2009-03-06
2010-09-10
Mcmaster University
Solar collection and light regulation apparatus
US20100255980A1
( en )
2009-04-03
2010-10-07
Guardian Industires Corp.
Low iron high transmission glass with boron oxide for improved optics, durability and refining, and corresponding method
US20100294338A1
( en )
2009-02-20
2010-11-25
Solaria Corporation
Large Area Concentrator Lens Structure and Method
WO2011048595A2
( en )
2009-10-21
2011-04-28
Pythagoras Solar Inc.
Window
US20110157703A1
( en )
2010-09-03
2011-06-30
Guardian Industries Corp.
Temperable three layer antireflective coating, coated article including temperable three layer antireflective coating, and/or method of making the same
US20110168232A1
( en )
2010-01-14
2011-07-14
Solaria Corporation
Method and System for Providing Tracking for Concentrated Solar Modules
US20110186107A1
( en )
2010-02-01
2011-08-04
Solaria Corporation
System and module for solar module with integrated glass concentrator
WO2011101682A2
( en )
2010-02-18
2011-08-25
University Of Ulster
Concentrating evacuated photovoltaic glazing panel
US20110259394A1
( en )
2010-04-26
2011-10-27
Guardian Industries Corp.
Patterned glass cylindrical lens arrays for concentrated photovoltaic systems, and/or methods of making the same
US20110263066A1
( en )
*
2010-04-26
2011-10-27
Guardian Industries Corp.
Patterned glass cylindrical lens arrays for concentrated photovoltaic systems, and/or methods of making the same
US8049098B2
( en )
2007-09-05
2011-11-01
Solaria Corporation
Notch structure for concentrating module and method of manufacture using photovoltaic strips
US20110315196A1
( en )
2009-04-15
2011-12-29
Solaria Corporation
Solar cell structure including a plurality of concentrator elements with a notch design and predetermined radii and method
US20120037204A1
( en )
2010-08-10
2012-02-16
Tien-Hsiang Sun
Solar system and solar tracking method for solar system
US8119902B2
( en )
2007-05-21
2012-02-21
Solaria Corporation
Concentrating module and method of manufacture for photovoltaic strips
US20120057236A1
( en )
2010-09-03
2012-03-08
Guardian Industries Corp.
Temperable three layer antirefrlective coating, coated article including temperable three layer antirefrlective coating, and/or method of making the same
US20120067397A1
( en )
2010-09-22
2012-03-22
Solaria Corporation
System and method for determining placement of photovoltaic strips using displacement sensors
US20120196133A1
( en )
2011-01-27
2012-08-02
David Broadway
Heat treatable four layer anti-reflection coating
US20120312900A1
( en )
2011-06-09
2012-12-13
Mitsubishi Electric Corporation
Fuel injection valve
US20120317900A1
( en )
2010-04-26
2012-12-20
Guardian Industries Corp.
Multi-functional photovoltaic skylight and/or methods of making the same
US20130149473A1
( en )
2011-12-13
2013-06-13
Marcus Frank
Insulating glass units with low-e and antireflective coatings, and/or methods of making the same
US20130196140A1
( en )
2012-01-30
2013-08-01
Guardian Industries Corp.
Coated article with antireflection coating including porous nanoparticles, and/or method of making the same
US20130196139A1
( en )
2012-01-30
2013-08-01
Mark A. Lewis
Coated article with antireflection coating including fullerene structures, and/or methods of making the same
2013
2013-09-24
US
US14/035,524
patent/US9574352B2/en
not_active
Expired - Fee Related
Patent Citations (63)
* Cited by examiner, â Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3682528A
( en )
1970-09-10
1972-08-08
Optical Coating Laboratory Inc
Infra-red interference filter
US3991741A
( en )
*
1975-03-20
1976-11-16
Northrup Jr Leonard L
Roof-lens solar collector
US4002031A
( en )
*
1975-07-07
1977-01-11
Varian Associates, Inc.
Solar energy converter with waste heat engine
FR2327643A1
( en )
1975-10-09
1977-05-06
Commissariat Energie Atomique
LUMINOUS ENERGY INTO ELECTRICAL ENERGY CONVERTER
US4782216A
( en )
1987-08-11
1988-11-01
Monsanto Company
Electrically heatable laminated window
US5204777A
( en )
*
1992-01-23
1993-04-20
Sea Corporation
Energy efficient skylight and blind
US5456764A
( en )
1992-04-24
1995-10-10
Fuji Electric Co., Ltd.
Solar cell and a method for the manufacture thereof
US6123824A
( en )
1996-12-13
2000-09-26
Canon Kabushiki Kaisha
Process for producing photo-electricity generating device
US6613603B1
( en )
1997-07-25
2003-09-02
Canon Kabushiki Kaisha
Photovoltaic device, process for production thereof, and zinc oxide thin film
US6288325B1
( en )
1998-07-14
2001-09-11
Bp Corporation North America Inc.
Producing thin film photovoltaic modules with high integrity interconnects and dual layer contacts
US6782718B2
( en )
1999-12-06
2004-08-31
Guardian Industries Corp.
Method of making matchable low-E I.G units and laminates
US6686050B2
( en )
2000-07-10
2004-02-03
Guardian Industries Corp.
Heat treatable low-E coated articles and methods of making same
US6723211B2
( en )
2000-07-10
2004-04-20
Guardian Industries Corp
Method of making coated articles with contact layer that is more oxidized further from IR reflecting layer
US6784361B2
( en )
2000-09-20
2004-08-31
Bp Corporation North America Inc.
Amorphous silicon photovoltaic devices
US6730352B2
( en )
2001-09-13
2004-05-04
Guardian Industries Corp.
Low-E matchable coated articles, and methods
US6936347B2
( en )
2001-10-17
2005-08-30
Guardian Industries Corp.
Coated article with high visible transmission and low emissivity
US6802943B2
( en )
2001-11-09
2004-10-12
Guardian Industries Corp.
Coated article with improved barrier layer structure and method of making the same
US6749941B2
( en )
2002-03-14
2004-06-15
Guardian Industries Corp.
Insulating glass (IG) window unit including heat treatable coating with silicon-rich silicon nitride layer
US20050081908A1
( en )
*
2003-03-19
2005-04-21
Stewart Roger G.
Method and apparatus for generation of electrical power from solar energy
WO2005057092A1
( en )
2003-12-11
2005-06-23
World Energy Solutions Pty Ltd
Solar energy collection system
US7700869B2
( en )
2005-02-03
2010-04-20
Guardian Industries Corp.
Solar cell low iron patterned glass and method of making same
US20060169316A1
( en )
2005-02-03
2006-08-03
Guardian Industries Corp.
Solar cell low iron patterned glass and method of making same
US7700870B2
( en )
2005-05-05
2010-04-20
Guardian Industries Corp.
Solar cell using low iron high transmission glass with antimony and corresponding method
US20060249199A1
( en )
2005-05-05
2006-11-09
Guardian Industries Corp.
Solar cell using low iron high transmission glass with antimony and corresponding method
US20070084502A1
( en )
*
2005-10-18
2007-04-19
Kelly Nelson A
Solar photovoltaic output for cloudy conditions with a solar tracking system
US20070215205A1
( en )
2006-03-13
2007-09-20
Guardian Industries Corp.
Solar cell using low iron high transmission glass and corresponding method
US7893350B2
( en )
2006-03-13
2011-02-22
Guardian Industries Corp.
Low iron transmission float glass for solar cell applications and method of making same
US20090217978A1
( en )
2006-03-13
2009-09-03
Guardian Industries Corp.
Low iron transmission float glass for solar cell applications and method of making same
WO2007143517A2
( en )
2006-06-01
2007-12-13
Solbeam, Inc.
Method and system for light ray concentration
US20090068474A1
( en )
2006-08-23
2009-03-12
Rockwell Collins, Inc.
Alkali silicate glass based coating and method for applying
US7767253B2
( en )
2007-03-09
2010-08-03
Guardian Industries Corp.
Method of making a photovoltaic device with antireflective coating
US8119902B2
( en )
2007-05-21
2012-02-21
Solaria Corporation
Concentrating module and method of manufacture for photovoltaic strips
US20090025777A1
( en )
2007-07-26
2009-01-29
Guardian Industries Corp.
Method of making an antireflective silica coating, resulting product and photovoltaic device comprising same
US20090032098A1
( en )
2007-08-03
2009-02-05