US20220345072A1 - Integrated photovoltaic module mounting system for use with tufted geosynthetics - Google Patents
Integrated photovoltaic module mounting system for use with tufted geosynthetics Download PDFInfo
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- US20220345072A1 US20220345072A1 US17/694,300 US202217694300A US2022345072A1 US 20220345072 A1 US20220345072 A1 US 20220345072A1 US 202217694300 A US202217694300 A US 202217694300A US 2022345072 A1 US2022345072 A1 US 2022345072A1
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- photovoltaic module
- recited
- tufted
- attaching
- tufted geosynthetic
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Images
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S20/00—Supporting structures for PV modules
- H02S20/10—Supporting structures directly fixed to the ground
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05C—EMBROIDERING; TUFTING
- D05C17/00—Embroidered or tufted products; Base fabrics specially adapted for embroidered work; Inserts for producing surface irregularities in embroidered products
- D05C17/02—Tufted products
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05C—EMBROIDERING; TUFTING
- D05C17/00—Embroidered or tufted products; Base fabrics specially adapted for embroidered work; Inserts for producing surface irregularities in embroidered products
- D05C17/02—Tufted products
- D05C17/026—Tufted products characterised by the tufted pile surface
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C13/00—Pavings or foundations specially adapted for playgrounds or sports grounds; Drainage, irrigation or heating of sports grounds
- E01C13/08—Surfaces simulating grass ; Grass-grown sports grounds
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B5/00—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them
- F16B5/02—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of fastening members using screw-thread
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S20/00—Supporting structures for PV modules
- H02S20/30—Supporting structures being movable or adjustable, e.g. for angle adjustment
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S30/00—Structural details of PV modules other than those related to light conversion
- H02S30/10—Frame structures
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
- H02S40/20—Optical components
- H02S40/22—Light-reflecting or light-concentrating means
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2505/00—Industrial
- D10B2505/20—Industrial for civil engineering, e.g. geotextiles
- D10B2505/202—Artificial grass
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon Stands for scientific apparatus such as gravitational force meters
- F16M11/20—Undercarriages with or without wheels
- F16M11/22—Undercarriages with or without wheels with approximately constant height, e.g. with constant length of column or of legs
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/52—PV systems with concentrators
Definitions
- This invention relates to an integrated mounting system for photovoltaic modules for use in solar energy collection.
- this invention relates to a non-ballasted and non-ground penetrating integrated photovoltaic mounting system for use with, and supported by, tufted geosynthetics.
- Photovoltaic solar modules have historically been mounted by use of a rigid racking system over a variety of surfaces such as rooftops, greenfields and brownfields. These rigid racking systems have not been integrated onto the photovoltaic module. Typical systems include racking structures that the photovoltaic module must be placed upon and then mechanically fastened to the racking structure.
- Racking structures are placed in spaced-relation and the racking structures enable orienting the photovoltaic module at an energy-generating efficient angle.
- the spacing limits the number of photovoltaic modules that can be installed in an area because the angling causes shadows.
- An adjacent rack must be spaced sufficiently that the photovoltaic modules are not within a shadow area.
- the integrated mounting system of this invention allows for easy installation supported by a tufted geosynthetic on a surface.
- This combination of the integrated mounting system and tufted geosynthetic results in a lower cost, lower maintenance of the surrounding surface, adaptable for variety of grades from flat to sloping ground and generates more solar power per unit area.
- the present invention integrates a photovoltaic module mounting system over tufted geosynthetics on various surfaces (such as a ground cover system, roof, reservoir, pond, etc.).
- various surfaces such as a ground cover system, roof, reservoir, pond, etc.
- the first component is one or more anti-creep strip(s) that enhances interface friction between the photovoltaic module and the tufted geosynthetic, while also reducing shearing forces between the photovoltaic module and its mounting surface, thus preventing or substantially preventing sliding forces from mobilizing the module.
- a monitoring device can be used to measure the amount of creep.
- the second component is a flexible attachment connection which is used, in addition to the anti-creep strip(s), as an additional factor of safety to increase interface friction and to counter potential shearing and uplift forces which could be caused by high wind gusts.
- the attachment connection can be welded directly to the tufted geosynthetic or the geomembrane and attached to the bottom, top or side of the photovoltaic module.
- Other means of attaching the connection to the geosynthetic include mechanical means (e.g., screws, bolts, etc.) and adhesive means such as glue, tape, etc.
- the integrated photovoltaic module mounting system of this invention allows for a higher density (i.e., one or more) of photovoltaic modules in a defined area as compared to traditional systems, and a higher density of modules enables the integrated photovoltaic module mounting system to provide more electrical power per unit area.
- the present invention meets a need in the art by providing an apparatus for mounting a photovoltaic module to a tufted geosynthetic cover overlying a surface, comprising one or more anti-creep strips for engaging with a photovoltaic module, the anti-creep strip having a plurality of spaced-apart projections extending from a surface opposing the attachment with the photovoltaic module, whereby the projections being disposed within tufts of the tufted geosynthetic, frictionally secures the photovoltaic module attached to the anti-creep strip to the tufted geosynthetic cover.
- the present invention further comprises a plurality of flexible attachment connectors, each for attaching at a first portion to the photovoltaic module and for attaching at a second portion to the tufted geosynthetic cover.
- the flexible attachment connector being attached to the photovoltaic module and attached to the tufted geosynthetic cover overlying a surface, secures the photovoltaic module to the tufted geosynthetic cover.
- the present invention provides a method of mounting a photovoltaic module to a tufted geosynthetic cover overlying a surface, comprising the steps of:
- the method of the present invention further comprises the step of attaching a plurality of flexible attachment connectors between the photovoltaic module and a tufted geosynthetic cover, each flexible attachment connector for attaching at a first portion to the photovoltaic module and for attaching at a second portion to the tufted geosynthetic cover,
- the present invention provides an apparatus for mounting a photovoltaic module to a tufted geosynthetic cover overlying a surface, comprising a plurality of flexible attachment connectors, each for attaching at a first portion to the photovoltaic module and for attaching at a second portion to the tufted geosynthetic cover, whereby the flexible attachment connector, being attached to the photovoltaic module and to the tufted geosynthetic cover, secures the photovoltaic module to the tufted geosynthetic cover.
- the present invention provides a method of mounting a photovoltaic module to a tufted geosynthetic cover overlying a surface, comprising the steps of:
- the flexible attachment connector being attached to the photovoltaic module and to the tufted geosynthetic cover, secures the photovoltaic module to the tufted geosynthetic cover.
- FIG. 1 shows multiple flexible attachment connections (i.e., single weld harnesses) mounted on a photovoltaic module.
- FIG. 1A shows a detailed bottom view of a single flexible attachment connection exploded away from a mounting baseplate attached to photovoltaic solar module.
- FIG. 2 is a view of multiple weld harness strips mounted on a photovoltaic module.
- FIG. 3 is a view of two anti-creep strips mounted on a photovoltaic module.
- FIG. 4 is a view of multiple single weld harnesses used with multiple anti-creep strips.
- FIG. 5A is a view of two weld harness strips used with multiple anti-creep strips.
- FIG. 5B shows two weld harness strips used with a single anti-creep strip.
- FIG. 5C shows two weld harness strips used with multiple anti-creep strips and multiple single weld harnesses.
- FIG. 6 shows a cross section of a single weld harness strip used with a photovoltaic module.
- FIG. 6A illustrates in side elevational view an embodiment of the photovoltaic module mounting system using a tilting device for selective orienting at an angle to the geosynthetic for optimal positioning relative to the sun for energy generation.
- FIG. 7 shows a top view of a single weld harness.
- the present invention provides an integrated photovoltaic module mounting system for use with a tufted geosynthetic system on a surface without a racking structure and without ballast for support.
- the essential components of this invention are a tufted geosynthetic system and one or more integrated photovoltaic module mounting systems.
- tufted geosynthetic systems useful in the integrated photovoltaic module mounting system of this invention are the covers marketed by Watershed Geosynthetics LLC under the registered trademarks ClosureTurf and VersaCap. These covers 11 comprise a composite of at least one geotextile 213 which is tufted with a plurality of spaced-apart tufts 215 with one or more synthetic yarns (i.e., a tufted geosynthetic) to simulate grass blades in a synthetic grass, and an impermeable geomembrane 217 comprised of a polymeric material.
- the synthetic grass blades of the system may contain an infill material and/or a material for protection of the synthetic grass blades against ultraviolet rays.
- One or more mono- or multi-crystalline solar modules can be used in the integrated photovoltaic module mounting system of this invention, such as commercially available polycrystalline silicon solar modules.
- Examples of effective solar modules are available from BYD (China) under the designation BYD 260P6C-30-DG and from Trina (China) under the designation Solar Duomax TSM-PEG14, Tallmax PE14A, and BYD P6C-36.
- An alternate embodiment discussed below gainfully uses a bifacial solar module.
- FIG. 1 shows in top view multiple single weld harnesses 1 secured by a mounting baseplate 2 attached to a solar module 3 .
- the weld harnesses 1 or tabs that extend flexibly laterally from a side edge of the solar module 3 and attach to at least some of the plurality of tufts 215 .
- the attaching may be accomplished by mechanically attached such as with a fastener, chemically attached, welding (heat or sonic), or thermoset bonding.
- FIG. 1A shows a detailed bottom view in which a single flexible weld harness 1 is exploded away from the mounting baseplate 2 that attaches, such as with adhesive 9 , to a bottom surface of the photovoltaic solar module 3 .
- the flexible weld harness 1 has a first portion 19 that defines an opening 12 for receiving a fastener such as a screw or bolt that engages a threaded passage 23 in the baseplate 2 .
- the threaded passage 23 extends in a raised spacer portion 21 of the baseplate 2 , such as a nut mounted therein.
- a second portion 22 of the flexible attachment connection 1 extends laterally as a flap to overlie and connect (by mechanically linking with a fastener, chemically connecting, heat or sonic welded, thermoset bond or attached, or adhesive) to a portion of a tufted geosynthetic ground cover 11 .
- FIG. 2 shows multiple elongated weld harness strips 4 secured by the respective mounting baseplates 2 attached to the solar module 3 .
- FIG. 3 shows two anti-creep strips 5 secured by the respective mounting baseplates 2 attached to solar module 3 .
- FIG. 4 shows multiple single weld harnesses 1 in combination with anti-creep strips 5 , both secured by mounting baseplate 2 attached to solar module 3 .
- FIG. 5A shows two weld harness strips 4 in combination with anti-creep strips 5 secured by mounting baseplate 2 attached to solar module 3 .
- FIG. 5B shows two weld harness strips 4 used with single anti-creep strip 5 secured by mounting baseplate 2 attached to solar module 3 .
- FIG. 5C shows two weld harness strips 4 used with multiple anti-creep strips 5 and secured by mounting baseplate 2 attached to solar module 3 .
- FIG. 6 shows a side elevational view of a single weld harness 1 secured to solar module 3 .
- FIG. 6A illustrates in side elevational view an embodiment of the photovoltaic module mounting apparatus using a tilting device generally 223 for selective orienting of the photovoltaic module 3 at an angle a to the geosynthetic cover 11 for optimal positioning relative to the sun for energy generation.
- FIG. 7 shows a top view of a single weld harness 1 having a single weld attachment in combination with wind disturbing openings 6 and openings 7 for attaching optional mechanical connections.
- This invention also provides a method for a non-ballasted module mounting system utilizing one or more anti-creep strips 5 integrated on the photovoltaic module when mounted over tufted geosynthetics, by increasing the coefficient of friction between the anti-creep strips and the tufted geosynthetic.
- the anti-creep strips 5 include a plurality of spaced-apart feet 46 depending from a bottom surface. The feet 46 inter-engage with the tufts 215 to provide frictional connection of the photovoltaic solar module 3 to the tufted geosynthetic cover 11 .
- the anti-creep strips 5 connect to the mounting plate 2 using a threaded fastener to engage the threaded passageway 23 in the baseplate 2 .
- the fastener extends through the anti-creep strip and the weld harness and threadably engages the passage 23 .
- the fastener may extend through the anti-creep strip and the weld harness and threadably engages the passage 23 .
- separate, or additional baseplates 2 may be used.
- the anti-creep strips footing is generally a structured geomembrane or tufted geosynthetic cover 11 .
- the anti-creep strips when used in this invention, comprise a polymeric material such as polyethylene, polypropylene, ethylene propylene diene monomer, rubber, metal, textured metal, polyvinyl chloride, polyurethane, etc.
- an alternate embodiment may charge the geosynthetic cover 11 with ballast infill 221 , to provide a mass that increases the frictional resistance to movement with the plurality of particles of the infill that fill interstices and spaces above the geotextile 213 and among the tufts 215 .
- suitable materials for infill are sand, concrete and materials available from Watershed Geosynthetics LLC (Alpharetta, Ga.) under the trademarks HydroBinder and ArmorFill. Infill can be of various colors, sizes and textures.
- Suitable materials for anti-creep strips are calendared, textured and structural membranes made by Agru America, Inc. under the trademark SureGripnet.
- the present invention comprises a wind-resistant non-ballasted integrated photovoltaic module mounting system for use on a tufted geosynthetic, which preferably includes both anti-creep strips and an attachment layer.
- the system does not rely on weight to resist wind forces, but instead relies on wind-breaking turf blades (i.e., the synthetic grass) and an attachment to the turf blades (synthetic grass).
- the cover of the present invention can be deployed over a large area with very minor ballasting.
- Wind-breaking elements 219 may also be utilized to break up the airflow over the integrated photovoltaic module to provide wind uplift resistance. As illustrated in FIG. 6 , one or more wind breaking elements generally 219 may attach to an edge of the photovoltaic module 3 .
- the wind breaking elements 219 comprise a plurality of thin spaced-apart pins that extend upwardly, for example, about 1-12 inches, preferably about 2-6 inches, and more preferably, about 2-3 inches.
- the weld harness 4 may include wind breaking or disturbing openings 6 .
- the wind velocity on the impermeable surface becomes turbulent near the surface of the cover, thus greatly reducing the actual wind velocity at the liner surface and decreasing associated uplift.
- the reaction of the synthetic grass of the tufted geosynthetic to the wind forces can also create a downward force on the geomembrane. This reaction is caused by the filaments of the synthetic grass applying an opposing force against the wind which is transferred as a downward force on the geomembrane.
- FIG. 6A illustrates in side elevational view an embodiment of the photovoltaic module mounting apparatus using the tilting device generally 223 for selective orienting of the photovoltaic module 3 at an oblique angle a relative to the geosynthetic cover 11 for optimal positioning relative to the sun for energy generation.
- the tilting device 223 comprises at least a pair of the mounting base plates 2 a , 2 b having riser portions 21 a , 21 b of different lengths, whereby the photovoltaic module 3 is disposed at the angle a to the geosynthetic cover 11 , for optimal energy generation.
- the mounting baseplate 2 spaces the photovoltaic solar module 3 from the tufted geosynthetic ground cover 11 .
- the spacing thereby creates a gap between the tufted geosynthetic ground cover and the photovoltaic solar module 3 , which gap facilitates air flow therealong for heat dissipation in that heating of the photovoltaic solar module 3 which occurs reduces the solar generation efficiency of the solar module.
- the mounting base plate 2 is sized to provide at least an 18 inch to 24 inch gap under the photovoltaic solar module 3 .
- the photovoltaic solar module 3 is bifacial and the tufted geosynthetic ground cover 11 includes light reflective features, such reflectants added into the polymeric used the extrusion of the yarn from which the tufts 215 are formed during tufting.
- tuft 215 a illustrates a reflectant 216 , for example, a small light-reflecting body or chip.
- a light reflective color pigment material may be included in the polymeric to enhance reflectivity of ambient light from the tufted geosynthetic ground cover 11 proximate the photovoltaic solar module 3 .
- tufts 215 b are tufted with yarns that include a coloring pigment 218 .
Abstract
An integrated photovoltaic module mounting system having a friction member for engagement with a portion of a tufted geosynthetic cover and optionally attaching connectors attached to a photovoltaic module and to the tufted geosynthetic cover, for collecting and utilizing solar energy. A method of securing a photovoltaic module to a tufted geosynthetic cover is disclosed.
Description
- This application claims the benefit of U.S. Provisional Patent Application Ser. No. 62/522,402 filed Jun. 20, 2017 and entitled Integrated Photovoltaic Module Mounting System For Use With Tufted Geosynthetics.
- Not applicable.
- This invention relates to an integrated mounting system for photovoltaic modules for use in solar energy collection. In a more specific aspect, this invention relates to a non-ballasted and non-ground penetrating integrated photovoltaic mounting system for use with, and supported by, tufted geosynthetics.
- In this application, the following terms will be understood to have the indicated definitions:
-
- “photovoltaic module”—a module which utilizes the generation of voltage when radiant energy (such as solar energy) falls on the module; sometimes referred to as a solar cell.
- “tufted geosynthetics”—a system which is adapted to cover waste sites and other environmental closures and which is generally comprised of synthetic grass having synthetic fibers tufted to a backing and a geomembrane. Examples of a tufted geosynthetic cover system are shown in Ayers and Urrutia U.S. Pat. Nos. 7,682,105 and 9,163,375. The term “tufted geosynthetics” is also used to refer to a synthetic turf cover system.
- “synthetic grass”—refers to a composite which comprises at least one geotextile (woven or nonwoven) tufted with one or more synthetic yarns or strands and which has the appearance of grass.
- “geomembrane”—refers to a polymeric material, such as high density polyethylene, very low density polyethylene, linear low density polyethylene, polyvinyl chloride, etc.
- “surface”—refers to a surface which has an angle of slope of zero or more.
- “creep”—refers to a behavior of materials (such as soils and geosynthetics) to move or deform slowly under a constant load or stress.
- Photovoltaic solar modules have historically been mounted by use of a rigid racking system over a variety of surfaces such as rooftops, greenfields and brownfields. These rigid racking systems have not been integrated onto the photovoltaic module. Typical systems include racking structures that the photovoltaic module must be placed upon and then mechanically fastened to the racking structure.
- Racking structures are placed in spaced-relation and the racking structures enable orienting the photovoltaic module at an energy-generating efficient angle. However, the spacing limits the number of photovoltaic modules that can be installed in an area because the angling causes shadows. An adjacent rack must be spaced sufficiently that the photovoltaic modules are not within a shadow area.
- There is a need in the solar industry for an integrated photovoltaic module in which the mounting mechanism is attached to the photovoltaic module which eliminates the need for a rigid racking system. The integration allows for an economical alternative to a traditional rigid racking system and enables the increasing of the density of the photovoltaic modules placed at a solar energy generation site, thereby increasing the potential generation of electrical power while allowing flexibility of installation by non-traditional racking installers.
- While use of solar as a renewable alternative energy source has “clean energy” favorabilities, there are drawback to such installations. Solar energy generation sites typically require large tracts of land. In some location circumstances, wooded lands are cleared or farm lands are re-purposed for use as solar energy generation sites. Other sites are significantly remote from tie-in connections to the power transmission and distribution grid of power generating and supply companies. These remote sites require capital expenditures to install and maintain transmission lines to the electrical grid and such transmission lines occupy additional land. Also, recent changes in power generation capacity has decreased reliance on coal and increased reliance on cleaner combustion fuels such as natural gas and, alternatively, power plants that generate electricity with turbines operated with steam heated by nuclear fuel sources. The coal-fired power plants nevertheless have large areas of ash holding ponds or storage areas. These areas are subject to closing with covers such as geomembranes that restrict environmental waters, such as rain or other precipitation or surface water flow, from passing through the covered site and leaching into the ground or pond.
- Accordingly, there is a need in the art for an improved integrated mounting system for securing photovoltaic modules to a surface for generating solar power. It is to such that the present invention is directed.
- The integrated mounting system of this invention allows for easy installation supported by a tufted geosynthetic on a surface. This combination of the integrated mounting system and tufted geosynthetic results in a lower cost, lower maintenance of the surrounding surface, adaptable for variety of grades from flat to sloping ground and generates more solar power per unit area.
- Briefly described, the present invention integrates a photovoltaic module mounting system over tufted geosynthetics on various surfaces (such as a ground cover system, roof, reservoir, pond, etc.). There are two preferred components of this invention that may be combined or used separately within the integrated photovoltaic module mounting system and within any combination thereof.
- The first component is one or more anti-creep strip(s) that enhances interface friction between the photovoltaic module and the tufted geosynthetic, while also reducing shearing forces between the photovoltaic module and its mounting surface, thus preventing or substantially preventing sliding forces from mobilizing the module. If desired, a monitoring device can be used to measure the amount of creep.
- The second component is a flexible attachment connection which is used, in addition to the anti-creep strip(s), as an additional factor of safety to increase interface friction and to counter potential shearing and uplift forces which could be caused by high wind gusts. The attachment connection can be welded directly to the tufted geosynthetic or the geomembrane and attached to the bottom, top or side of the photovoltaic module. Other means of attaching the connection to the geosynthetic include mechanical means (e.g., screws, bolts, etc.) and adhesive means such as glue, tape, etc.
- These two components eliminate the need for ballast compared to a traditional photovoltaic racking system which does not have foundation anchoring. The integrated photovoltaic module mounting system supported by a tufted geosynthetic requires no ballast on a surface. These two components enable multiple configurations (as shown in the drawings).
- The result of a non-ballasted integrated photovoltaic module mounting system allows for a lower cost and increased power generation through higher density of module placement. An additional advantage of an integrated photovoltaic module mounting system is that the system does not require grounding.
- The integrated photovoltaic module mounting system of this invention allows for a higher density (i.e., one or more) of photovoltaic modules in a defined area as compared to traditional systems, and a higher density of modules enables the integrated photovoltaic module mounting system to provide more electrical power per unit area.
- More particularly recited, the present invention meets a need in the art by providing an apparatus for mounting a photovoltaic module to a tufted geosynthetic cover overlying a surface, comprising one or more anti-creep strips for engaging with a photovoltaic module, the anti-creep strip having a plurality of spaced-apart projections extending from a surface opposing the attachment with the photovoltaic module, whereby the projections being disposed within tufts of the tufted geosynthetic, frictionally secures the photovoltaic module attached to the anti-creep strip to the tufted geosynthetic cover.
- In another aspect, the present invention further comprises a plurality of flexible attachment connectors, each for attaching at a first portion to the photovoltaic module and for attaching at a second portion to the tufted geosynthetic cover. The flexible attachment connector, being attached to the photovoltaic module and attached to the tufted geosynthetic cover overlying a surface, secures the photovoltaic module to the tufted geosynthetic cover.
- In another aspect, the present invention provides a method of mounting a photovoltaic module to a tufted geosynthetic cover overlying a surface, comprising the steps of:
- (a) engaging one or more anti-creep strips with a photovoltaic module, the anti-creep strip having a plurality of spaced-apart projections extending from a surface opposing the attachment with the photovoltaic module, and
- (b) disposing the photovoltaic module over a portion of the tufted geosynthetic cover,
- whereby the projections being disposed within tufts of the tufted geosynthetic cover, frictionally secures the photovoltaic module attached to the anti-creep strip to the tufted geosynthetic cover.
- In yet a further aspect, the method of the present invention further comprises the step of attaching a plurality of flexible attachment connectors between the photovoltaic module and a tufted geosynthetic cover, each flexible attachment connector for attaching at a first portion to the photovoltaic module and for attaching at a second portion to the tufted geosynthetic cover,
- whereby the flexible attachment connector, being attached to the photovoltaic module and attached to the tufted geosynthetic cover secures the photovoltaic module to the tufted geosynthetic cover.
- In yet another aspect, the present invention provides an apparatus for mounting a photovoltaic module to a tufted geosynthetic cover overlying a surface, comprising a plurality of flexible attachment connectors, each for attaching at a first portion to the photovoltaic module and for attaching at a second portion to the tufted geosynthetic cover, whereby the flexible attachment connector, being attached to the photovoltaic module and to the tufted geosynthetic cover, secures the photovoltaic module to the tufted geosynthetic cover.
- In a further aspect, the present invention provides a method of mounting a photovoltaic module to a tufted geosynthetic cover overlying a surface, comprising the steps of:
- (a) attaching a plurality of flexible attachment connectors to the photovoltaic module, each flexible attachment connector having a first portion configured for attaching to the photovoltaic module; and
- (b) attaching a second portion of the flexible attachment connectors to the tufted geosynthetic cover,
- whereby the flexible attachment connector, being attached to the photovoltaic module and to the tufted geosynthetic cover, secures the photovoltaic module to the tufted geosynthetic cover.
- Objects, advantages and features of the present invention will become apparent upon a reading of the following detailed description in conjunction with the drawings and the appended claims.
-
FIG. 1 shows multiple flexible attachment connections (i.e., single weld harnesses) mounted on a photovoltaic module. -
FIG. 1A shows a detailed bottom view of a single flexible attachment connection exploded away from a mounting baseplate attached to photovoltaic solar module. -
FIG. 2 is a view of multiple weld harness strips mounted on a photovoltaic module. -
FIG. 3 is a view of two anti-creep strips mounted on a photovoltaic module. -
FIG. 4 is a view of multiple single weld harnesses used with multiple anti-creep strips. -
FIG. 5A is a view of two weld harness strips used with multiple anti-creep strips. -
FIG. 5B shows two weld harness strips used with a single anti-creep strip. -
FIG. 5C shows two weld harness strips used with multiple anti-creep strips and multiple single weld harnesses. -
FIG. 6 shows a cross section of a single weld harness strip used with a photovoltaic module. -
FIG. 6A illustrates in side elevational view an embodiment of the photovoltaic module mounting system using a tilting device for selective orienting at an angle to the geosynthetic for optimal positioning relative to the sun for energy generation. -
FIG. 7 shows a top view of a single weld harness. - The present invention provides an integrated photovoltaic module mounting system for use with a tufted geosynthetic system on a surface without a racking structure and without ballast for support.
- The essential components of this invention are a tufted geosynthetic system and one or more integrated photovoltaic module mounting systems.
- Examples of tufted geosynthetic systems useful in the integrated photovoltaic module mounting system of this invention are the covers marketed by Watershed Geosynthetics LLC under the registered trademarks ClosureTurf and VersaCap. These covers 11 comprise a composite of at least one
geotextile 213 which is tufted with a plurality of spaced-aparttufts 215 with one or more synthetic yarns (i.e., a tufted geosynthetic) to simulate grass blades in a synthetic grass, and animpermeable geomembrane 217 comprised of a polymeric material. - The synthetic grass blades of the system may contain an infill material and/or a material for protection of the synthetic grass blades against ultraviolet rays.
- One or more mono- or multi-crystalline solar modules can be used in the integrated photovoltaic module mounting system of this invention, such as commercially available polycrystalline silicon solar modules. Examples of effective solar modules are available from BYD (China) under the designation BYD 260P6C-30-DG and from Trina (China) under the designation Solar Duomax TSM-PEG14, Tallmax PE14A, and BYD P6C-36. An alternate embodiment discussed below gainfully uses a bifacial solar module.
- Referring now to the drawings, in which like numerals represent like elements,
FIG. 1 shows in top view multiple single weld harnesses 1 secured by a mountingbaseplate 2 attached to asolar module 3. The weld harnesses 1 or tabs that extend flexibly laterally from a side edge of thesolar module 3 and attach to at least some of the plurality oftufts 215. The attaching may be accomplished by mechanically attached such as with a fastener, chemically attached, welding (heat or sonic), or thermoset bonding. -
FIG. 1A shows a detailed bottom view in which a singleflexible weld harness 1 is exploded away from the mountingbaseplate 2 that attaches, such as with adhesive 9, to a bottom surface of the photovoltaicsolar module 3. Theflexible weld harness 1 has a first portion 19 that defines anopening 12 for receiving a fastener such as a screw or bolt that engages a threadedpassage 23 in thebaseplate 2. The threadedpassage 23 extends in a raisedspacer portion 21 of thebaseplate 2, such as a nut mounted therein. Asecond portion 22 of theflexible attachment connection 1 extends laterally as a flap to overlie and connect (by mechanically linking with a fastener, chemically connecting, heat or sonic welded, thermoset bond or attached, or adhesive) to a portion of a tuftedgeosynthetic ground cover 11. - Instead of a
tab 1 for the weld harness,FIG. 2 shows multiple elongated weld harness strips 4 secured by therespective mounting baseplates 2 attached to thesolar module 3. -
FIG. 3 shows twoanti-creep strips 5 secured by therespective mounting baseplates 2 attached tosolar module 3. -
FIG. 4 shows multiple single weld harnesses 1 in combination withanti-creep strips 5, both secured by mountingbaseplate 2 attached tosolar module 3. -
FIG. 5A shows two weld harness strips 4 in combination withanti-creep strips 5 secured by mountingbaseplate 2 attached tosolar module 3. -
FIG. 5B shows two weld harness strips 4 used with singleanti-creep strip 5 secured by mountingbaseplate 2 attached tosolar module 3. -
FIG. 5C shows two weld harness strips 4 used with multipleanti-creep strips 5 and secured by mountingbaseplate 2 attached tosolar module 3. -
FIG. 6 shows a side elevational view of asingle weld harness 1 secured tosolar module 3. -
FIG. 6A illustrates in side elevational view an embodiment of the photovoltaic module mounting apparatus using a tilting device generally 223 for selective orienting of thephotovoltaic module 3 at an angle a to thegeosynthetic cover 11 for optimal positioning relative to the sun for energy generation. -
FIG. 7 shows a top view of asingle weld harness 1 having a single weld attachment in combination withwind disturbing openings 6 andopenings 7 for attaching optional mechanical connections. - This invention also provides a method for a non-ballasted module mounting system utilizing one or more
anti-creep strips 5 integrated on the photovoltaic module when mounted over tufted geosynthetics, by increasing the coefficient of friction between the anti-creep strips and the tufted geosynthetic. Theanti-creep strips 5 include a plurality of spaced-apart feet 46 depending from a bottom surface. Thefeet 46 inter-engage with thetufts 215 to provide frictional connection of the photovoltaicsolar module 3 to thetufted geosynthetic cover 11. In the illustrated embodiment, theanti-creep strips 5 connect to the mountingplate 2 using a threaded fastener to engage the threadedpassageway 23 in thebaseplate 2. In embodiments that uses both theanti-creep strips 5 and the weld harness 1 (or elongated attaching strip 4), the fastener extends through the anti-creep strip and the weld harness and threadably engages thepassage 23. Alternatively, separate, oradditional baseplates 2 may be used. - The anti-creep strips footing is generally a structured geomembrane or tufted
geosynthetic cover 11. - The anti-creep strips, when used in this invention, comprise a polymeric material such as polyethylene, polypropylene, ethylene propylene diene monomer, rubber, metal, textured metal, polyvinyl chloride, polyurethane, etc.
- Further, an alternate embodiment may charge the
geosynthetic cover 11 withballast infill 221, to provide a mass that increases the frictional resistance to movement with the plurality of particles of the infill that fill interstices and spaces above thegeotextile 213 and among thetufts 215. When used in this invention, suitable materials for infill are sand, concrete and materials available from Watershed Geosynthetics LLC (Alpharetta, Ga.) under the trademarks HydroBinder and ArmorFill. Infill can be of various colors, sizes and textures. - When used in this invention, examples of suitable materials for anti-creep strips are calendared, textured and structural membranes made by Agru America, Inc. under the trademark SureGripnet.
- The present invention comprises a wind-resistant non-ballasted integrated photovoltaic module mounting system for use on a tufted geosynthetic, which preferably includes both anti-creep strips and an attachment layer. The system does not rely on weight to resist wind forces, but instead relies on wind-breaking turf blades (i.e., the synthetic grass) and an attachment to the turf blades (synthetic grass). The cover of the present invention can be deployed over a large area with very minor ballasting. Wind-breaking
elements 219 may also be utilized to break up the airflow over the integrated photovoltaic module to provide wind uplift resistance. As illustrated inFIG. 6 , one or more wind breaking elements generally 219 may attach to an edge of thephotovoltaic module 3. Thewind breaking elements 219 comprise a plurality of thin spaced-apart pins that extend upwardly, for example, about 1-12 inches, preferably about 2-6 inches, and more preferably, about 2-3 inches. In an alternate embodiment, theweld harness 4 may include wind breaking ordisturbing openings 6. - With this invention, the wind velocity on the impermeable surface (geo-membrane) becomes turbulent near the surface of the cover, thus greatly reducing the actual wind velocity at the liner surface and decreasing associated uplift. The reaction of the synthetic grass of the tufted geosynthetic to the wind forces can also create a downward force on the geomembrane. This reaction is caused by the filaments of the synthetic grass applying an opposing force against the wind which is transferred as a downward force on the geomembrane.
- The integrated photovoltaic module of this invention can be used with an optional tilting device to raise or lower the module for better results depending on the location.
FIG. 6A illustrates in side elevational view an embodiment of the photovoltaic module mounting apparatus using the tilting device generally 223 for selective orienting of thephotovoltaic module 3 at an oblique angle a relative to thegeosynthetic cover 11 for optimal positioning relative to the sun for energy generation. Thetilting device 223 comprises at least a pair of the mountingbase plates riser portions photovoltaic module 3 is disposed at the angle a to thegeosynthetic cover 11, for optimal energy generation. - Further, the mounting
baseplate 2 spaces the photovoltaicsolar module 3 from the tuftedgeosynthetic ground cover 11. The spacing thereby creates a gap between the tufted geosynthetic ground cover and the photovoltaicsolar module 3, which gap facilitates air flow therealong for heat dissipation in that heating of the photovoltaicsolar module 3 which occurs reduces the solar generation efficiency of the solar module. In an alternate embodiment, the mountingbase plate 2 is sized to provide at least an 18 inch to 24 inch gap under the photovoltaicsolar module 3. To further enhance solar generation energy capacity, the photovoltaicsolar module 3 is bifacial and the tuftedgeosynthetic ground cover 11 includes light reflective features, such reflectants added into the polymeric used the extrusion of the yarn from which thetufts 215 are formed during tufting. As shown inFIG. 1 , tuft 215 a illustrates areflectant 216, for example, a small light-reflecting body or chip. Further, a light reflective color pigment material may be included in the polymeric to enhance reflectivity of ambient light from the tuftedgeosynthetic ground cover 11 proximate the photovoltaicsolar module 3. For example,tufts 215 b are tufted with yarns that include acoloring pigment 218. - This invention has been described with particular reference to certain embodiments, but variations and modifications can be made without departing from the spirit and scope of the invention.
Claims (23)
1.-22. (canceled)
23. An apparatus for mounting a photovoltaic module to a tufted geosynthetic cover overlying a surface, comprising:
a plurality of flexible attachment connectors, each for attaching at a first portion to the photovoltaic module and for attaching at a second portion to the tufted geosynthetic cover,
whereby the flexible attachment connector, being attached to the photovoltaic module and to the tufted geosynthetic cover, secures the photovoltaic module to the tufted geosynthetic cover.
24. The apparatus as recited in claim 23 , further comprising:
one or more anti-creep strips for attaching to a photovoltaic module, said anti-creep strip having a plurality of spaced-apart projections extending from a surface opposing the attachment with the photovoltaic module,
whereby the projections being disposed within tufts of the tufted geosynthetic, frictionally secures the photovoltaic module attached to the anti-creep strip to the tufted geosynthetic cover.
25. The apparatus as recited in claim 24 , wherein the projections of the anti-creep strip comprise a plurality of spaced-apart feet projecting from a bottom surface of the anti-creep strip.
26. The apparatus as recited in claim 25 , further comprising a tufted geosynthetic cover that comprises a fabric member having a plurality of tufts tufted with a yarn and the tufts extending from the fabric member as a plurality of slender elongated blades of an artificial grass,
whereby a frictional force arises by the feet of the anti-creep strips being engaged with one or more of the tufted blades, for resisting wind uplift of the photovoltaic module from the tufted geosynthetic.
27. The apparatus as recited in claim 23 , wherein attaching comprises mechanically attached, chemically attached, heat or sonic welding, or thermoset bonding.
28. The apparatus as recited in claim 23 , wherein the attachment connectors comprise elongate strips of a material suitable for welding to the tufted geosynthetic cover.
29. The apparatus as recited in claim 23 , further comprising a mounting baseplate secured to the photovoltaic module, the first portion of the flexible attachment connector for attaching thereto for securing the flexible attachment connector to the photovoltaic module.
30. The apparatus as recited in claim 26 , wherein the tufts further comprise a light reflective element.
31. The apparatus as recited in claim 23 , further comprising a tufted geosynthetic cover that comprises a fabric member having a plurality of tufts tufted with a yarn and the tuffs extending from the fabric member as slender elongated blades of an artificial grass; and
an infill of granular material received within an interspatial gap between the extending blades and the fabric member.
32. The apparatus as recited in claim 31 , wherein the yarn includes a reflective additive.
33. The apparatus as recited in claim 32 , wherein the yarn includes a light reflective pigment.
34. The apparatus as recited in claim 23 , further comprising a wind breaking element.
35. The apparatus as recited in claim 34 , wherein the wind breaking element comprises a plurality of pins extending upwardly.
36. The apparatus as recited in claim 34 , wherein the wind breaking element comprises a portion of the attaching connector defining at least one opening.
37. The apparatus as recited in claim 23 , further comprising a tilting device, whereby the photovoltaic module is oriented at a selected angle relative to the geosynthetic cover for generation of electricity.
38. A method of mounting a photovoltaic module to a tufted geosynthetic cover overlying a surface, comprising the steps of:
(a) attaching a plurality of flexible attachment connectors to the photovoltaic module, each flexible attachment connector having a first portion configured for attaching to the photovoltaic module; and
(b) attaching a second portion of the flexible attachment connectors to the tufted geosynthetic cover,
whereby the flexible attachment connector, being attached to the photovoltaic module and to the tufted geosynthetic cover, secures the photovoltaic module to the tufted geosynthetic cover.
39. The method as recited in claim 38 , further comprising the steps of:
engaging one or more anti-creep strips with a photovoltaic module, the anti-creep strip having a plurality of spaced-apart projections extending from a surface opposing the attachment with the photovoltaic module, and
disposing the photovoltaic module over a portion of the tufted geosynthetic cover,
whereby the projections being disposed within tufts of the tufted geosynthetic cover, frictionally secures the photovoltaic module attached to the anti-creep strip to the tufted geosynthetic cover.
40. The method as recited in claim 38 , where attaching of the attachment connector to the tufted geosynthetic cover comprises mechanically attaching with a fastener, chemically attaching, welding (heat or sonic), or thermoset bonding.
41. The method as recited in claim 38 , further comprising the step of distributing over the geosynthetic cover a ballast for filling a portion of the interstices between the tufts.
42. The method as recited in claim 38 , further comprising the step of providing a wind breaking element.
43. The method as recited in claim 42 , wherein the providing of the wind breaking element comprises the step of attaching to an edge of the photovoltaic module a plurality of spaced-apart pins that extend in a first direction away from the tufted geosynthetic cover.
44. The method as recited in claim 42 , wherein the providing of the wind breaking element comprises providing an opening in a portion of the attaching connector proximate the attachment to the tufts.
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US16/013,437 US20180366600A1 (en) | 2017-06-20 | 2018-06-20 | Integrated photovoltaic module mounting system for use with tufted geosynthetics |
US16/921,137 US11277091B2 (en) | 2017-06-20 | 2020-07-06 | Integrated photovoltaic module mounting system for use with tufted geosynthetics |
US17/694,300 US20220345072A1 (en) | 2017-06-20 | 2022-03-14 | Integrated photovoltaic module mounting system for use with tufted geosynthetics |
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IL253535B (en) * | 2017-07-18 | 2021-07-29 | Slatics Ltd | Anchoring structure for ground mounting of solar photovoltaic system |
WO2021055619A1 (en) * | 2019-09-17 | 2021-03-25 | Watershed Solar, Llc | Rail friction strip for mechanically engaging tufted geotextile ground cover |
US11456695B2 (en) | 2020-01-20 | 2022-09-27 | Erthos, Inc. | Leading edge units device and methods |
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