WO2010140878A2 - A method of mounting a multitude of devices for harnessing solar energy, a positioning body for use in said method, a clamp guiding body, and a prefab roof element - Google Patents

A method of mounting a multitude of devices for harnessing solar energy, a positioning body for use in said method, a clamp guiding body, and a prefab roof element Download PDF

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Publication number
WO2010140878A2
WO2010140878A2 PCT/NL2010/000090 NL2010000090W WO2010140878A2 WO 2010140878 A2 WO2010140878 A2 WO 2010140878A2 NL 2010000090 W NL2010000090 W NL 2010000090W WO 2010140878 A2 WO2010140878 A2 WO 2010140878A2
Authority
WO
WIPO (PCT)
Prior art keywords
body
plate
clamp
screw
solar energy
Prior art date
Application number
PCT/NL2010/000090
Other languages
French (fr)
Other versions
WO2010140878A3 (en
Inventor
Peter Wieriks
Marco Willem Jansen
Brecht Tabe Van Der Laan
Jasper Beekmann
Original Assignee
Ecofys Investments B.V.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to NL1037010A priority Critical patent/NL1037010C2/en
Priority to NL1037010 priority
Application filed by Ecofys Investments B.V. filed Critical Ecofys Investments B.V.
Publication of WO2010140878A2 publication Critical patent/WO2010140878A2/en
Publication of WO2010140878A3 publication Critical patent/WO2010140878A3/en

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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02SGENERATION OF ELECTRIC POWER BY CONVERSION OF INFRA-RED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
    • H02S20/00Supporting structures for PV modules
    • H02S20/20Supporting structures directly fixed to an immovable object
    • H02S20/22Supporting structures directly fixed to an immovable object specially adapted for buildings
    • H02S20/23Supporting structures directly fixed to an immovable object specially adapted for buildings specially adapted for roof structures
    • H02S20/25Roof tile elements
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24SSOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S20/00Solar heat collectors specially adapted for particular uses or environments
    • F24S20/60Solar heat collectors integrated in fixed constructions, e.g. in buildings
    • F24S20/67Solar heat collectors integrated in fixed constructions, e.g. in buildings in the form of roof constructions
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24SSOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S25/00Arrangement of stationary mountings or supports for solar heat collector modules
    • F24S25/40Arrangement of stationary mountings or supports for solar heat collector modules using plate-like mounting elements, e.g. profiled or corrugated plates; Plate-like module frames 
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24SSOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S25/00Arrangement of stationary mountings or supports for solar heat collector modules
    • F24S25/60Fixation means, e.g. fasteners, specially adapted for supporting solar heat collector modules
    • F24S25/61Fixation means, e.g. fasteners, specially adapted for supporting solar heat collector modules for fixing to the ground or to building structures
    • F24S25/615Fixation means, e.g. fasteners, specially adapted for supporting solar heat collector modules for fixing to the ground or to building structures for fixing to protruding parts of buildings, e.g. to corrugations or to standing seams
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24SSOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S25/00Arrangement of stationary mountings or supports for solar heat collector modules
    • F24S25/60Fixation means, e.g. fasteners, specially adapted for supporting solar heat collector modules
    • F24S25/63Fixation means, e.g. fasteners, specially adapted for supporting solar heat collector modules for fixing modules or their peripheral frames to supporting elements
    • F24S25/634Clamps; Clips
    • F24S25/636Clamps; Clips clamping by screw-threaded elements
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24SSOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S25/00Arrangement of stationary mountings or supports for solar heat collector modules
    • F24S2025/01Special support components; Methods of use
    • F24S2025/014Methods for installing support elements
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00Adapting or protecting infrastructure or their operation
    • Y02A30/60Planning or developing urban green infrastructure
    • Y02A30/62Integration of district energy or distributed or on-site energy generation, e.g. combined heat and power generation or solar energy, in city layout
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00Integration of renewable energy sources in buildings
    • Y02B10/10Photovoltaic [PV]
    • Y02B10/12Roof systems for PV cells
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00Integration of renewable energy sources in buildings
    • Y02B10/20Solar thermal
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/40Solar thermal energy
    • Y02E10/44Heat exchange systems
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/40Solar thermal energy
    • Y02E10/47Mountings or tracking

Abstract

The invention relates to a method of mounting a multitude of devices for harnessing solar energy (108). According to the invention at least one planar body (102) comprising a material in which a screw can be driven is provided with a plate impermeable to liquid water (103), wherein the front side of the plate (103) has parallel grooves (104) and parallel elevated areas (105) between the parallel grooves (104). The devices for harnessing solar energy (108) are clamped to the at least one planar body (102), said clamping involving placing the devices (108) over the plate (103) and driving screws (106) through the plate (103) into the at least one planar body (102) at said parallel elevated areas (105) of the plate (103) which have two adjacent grooves (104) resting on top of and against the planar body (102).

Description

A method of mounting a multitude of devices for harnessing solar energy, a positioning body for use in said method, a clamp guiding body, and a prefab roof element

The present invention relates to a method of mounting a multitude of devices for harnessing solar energy.

A method of mounting devices for harnessing solar energy, such as PV solar panels, is known in the art. For example, EP0949686 discloses a device and a method of mounting PV solar panels to a slant- ing roof. The method comprises using the device, the device comprising a plastic plate having a peripheral profile to overlap with other plates like roof tiles so as to form a layer impermeable to rain. The peripheral profile has grooves to drain rainwater. The device also has support profiles, for supporting a solar panel via U-shaped (alu- minium) profiles attached to the support profiles. The device itself is attached to tile laths.

The above method and device offer a fair amount of flexibility. However, nowadays devices for harnessing solar energy come in more and more diverse sizes, for which reason an alternative is needed. Also, solar power is still relatively expensive and any cost-saving

- be it in material or work involved - has a significant effect on the time it takes to reach break-even.

To this end, the invention provides a method of mounting a multitude of devices for harnessing solar energy wherein - at least one planar body comprising a material in which a screw can be driven is provided with a plate impermeable to liquid water, said plate having a front side and a back side, wherein the front side of the plate has parallel grooves and parallel elevated areas between the parallel grooves, such that - at locations where clamps for clamping the devices for harnessing solar energy are to be attached to the material in which a screw can be driven, said material in which a screw can be driven is present,

- at least two grooves immediately adjacent to a parallel ele- vated area rest on top of and against the at least one planar body, and a multitude of parallel elevated areas having two adjacent grooves resting on top of and against the at least one planar body exist, - the devices for harnessing solar energy are clamped to the at least one planar body, said clamping involving placing the devices for harnessing solar energy over the plate and driving screws through the plate into the at least one planar body at said parallel elevated ar- eas of the plate which each have two adjacent grooves resting on top of and against the planar body.

This allows for a flexible, cost-effective mounting of solar panels - be they PV panels or for heating of a fluid. In contrast to the method of EP0949686, the water-impermeable plate does not pass on pulling force exerted by a device for harnessing solar energy (as may be caused by strong winds) and is merely sandwiched between the clamps and the planar body comprising a material in which a screw can be driven. Generally, the whole planar body is of a material in which a screw can be driven, such as wood or MDF. Typically, the centre-to- centre distance between two adjacent parallel elevated areas is less than 8 cm. The device for harnessing solar energy may have lips with holes, and the screw is inserted in hole of the lip and clamps the device to the planar body.

According to a preferred embodiment, the centre-to-centre dis- tance between the parallel grooves is less than 5 cm.

Thus a high degree of precision is possible in choosing a desired location for a clamp. Generally, the distance will be at least 1 cm.

According to a preferred embodiment, the plate is nestable. This allows for more cost-effective storage and transport.

According to a very favourable embodiment, the nestable plate is a corrugated plate.

Corrugated plates are easy to manufacture and offer a maximum of flexibility because there is a large number of positions that the positioning body can occupy. It also provides for a large degree of rigidity, which is of particular benefit if planks are used to support the corrugated plates .

An important embodiment is characterized in that a positioning body is used having a screw insertion point to facilitate driving in a screw at a parallel elevated area on the plate, the positioning body having a back side for facing the plate and a front side, the back side being provided with protrusions to mesh with the two parallel grooves adjacent to the parallel elevated areas, restricting the position of the screw insertion point to a point over the parallel elevated area having two adjacent parallel grooves resting on top of and against the at least one planar body.

The screw insertion point is for example a marking, which en- sures that the craftsman mounting the device for harnessing solar energy will attach the clamp to the planar body comprising a material in which a screw can be driven at an elevated area, which in turn ensures that no liquid water will reach the backside of the plate.

In accordance to a preferred embodiment, the screw insertion point is a hole for the screw.

This makes it even easier and quicker to mount the device for harnessing solar energy, which is in particular important if the mounting has to be done on top of a building.

A much preferred embodiment of the method according to the in- vention is characterized in that the front side of the positioning body comprises a pair of parallel, longitudinally extending walls, at least one of the walls of the pair being provided with a flange member, the walls and the flange member capable of retaining a first threaded connection organ between the walls,

- allowing translational movement of said first threaded connection organ between the walls, but

- preventing rotation of said first threaded connection organ, wherein a device for harnessing solar energy is clamped using clamps, a clamp comprising a clamp base and a top clamp part, wherein the clamp base comprises a hole for clamping the clamp base to the positioning body using the first threaded connection organ and a second threaded connection organ capable of cooperating with said first connection organ; the mounting of the device for harnessing solar energy involving

- engaging the first and second threaded connection devices to prohibit the translational movement of the first threaded connection organ when the clamp base has been clamped at a desired location; and sandwiching the device for harnessing solar energy between the clamp base and the top clamp part.

This provides for a very satisfactory flexibility when mounting with relatively few parts. Another highly preferred embodiment of the method according to the invention is characterized in that a clamp guiding body comprising a pair of parallel, longitudinally extending walls, at least one of the walls of the pair being provided with a flange member, the walls and the flange member capable of retaining a first threaded connection organ between the walls,

- allowing translational movement of said first threaded connection organ between the walls, but - preventing rotation of said first threaded connection organ; on top of the positioning body is attached to the planar body by driving screws through the positioning body at the locations of screw insertion points, wherein a device for harnessing solar energy is clamped to the clamp guiding body using clamps, a clamp comprising a clamp base and a top clamp part, wherein the clamp base comprises a hole for clamping the clamp base to the positioning body using the first threaded connection organ and a second threaded connection organ capable of cooperating with said first connection organ; the clamping of the device for harnessing solar energy involving - clamping the clamp guiding body to the positioning body by engaging the first and second threaded connection devices to prohibit the translational movement of the first threaded connection organ when the clamp base has been clamped at a desired location; and

- sandwiching the device for harnessing solar energy between the clamp base and the top clamp part.

This provides for a very satisfactory flexibility when mounting with still relatively few parts.

Preferably the clamp guiding body is rotatably connected to the positioning body or connectable at the front side of the positioning body in two orientations that are perpendicular to each other.

This allows the person that is to mount the devices to take only one clamp assembly, and the assembly can be used for both landscape and portrait, so the person always has the right clamp assembly available to him. A preferred method is characterized in that

- a clamp base for attaching a top clamp part is placed on top of the positioning body, the clamp base comprising a slot to serve as a guiding for the screw inserted into the slot and partially driven through the positioning body into the planar body of the material in which a screw can be driven, said guiding allowing for movement of the clamp base in a lateral direction with respect to the parallel grooves of the plate, - the screw is driven deeper into the material in which a screw can be driven, fixing the clamp base with respect to the positioning body, and

- the top clamp part is attached to the clamp base so as to clamp a device for harnessing solar energy to the planar body. This allows for very flexible mounting in portrait orientation, allowing for accurate positioning in a direction perpendicular to the parallel grooves, of the device for harnessing solar energy, which generally is harder to achieve.

According to a preferred method, the positioning body comprises a clamp base, and the positioning body comprising the clamp base is attached to the planar body comprising a material in which a screw can be driven by driving a screw into the plate at the screw insertion point.

The use of a positioning body with an integrated clamp base is suitable for landscape mounting of devices for harnessing solar energy, and saves time and money because fewer components are necessary and less assembly is required.

It is preferred that in the method according to the invention, the plate is a plastic plate. Plastic plates can be manufactured cheaply and allow for a long life span.

According to a favourable embodiment, the at least one planar body is attached to a member chosen from i) a building, such that the parallel grooves slope downwardly, and ii) a prefab roof element. In accordance with an important area of application of the method according to the present invention, the at least one planar body is attached to and on top of tile laths. In the present application, the term "prefab roof element" comprises a prefab roof. A prefab roof may comprise one or more prefab roof elements. According to a favourable embodiment, a plurality of planar bodies is used and the planar bodies being downwardly sloping planks connecting tile laths, and the plate being rigid in at least one di- rection of the plate, said direction corresponding to the direction of the planar bodies .

Thus the amount of material needed for flexible mounting is reduced, while sagging and concomitant risk of leakage of water is re- duced.

In accordance with an important field of application, the device for harnessing solar energy is a PV solar panel.

The invention also relates to a positioning body suitable for use in the method according to the invention, wherein said position- ing body has a first side provided with at least four protrusions defining at least one first groove to mesh with a plate impermeable to liquid water, said plate having parallel grooves and parallel elevated areas between the parallel grooves, and at least one second groove perpen- dicular to the at least one first groove for meshing with said plate,

- a second side having a screw insertion point to facilitate driving in a screw, which screw insertion point is located over the at least one of the first groove and the second groove.

Such a positioning body is very convenient as it may be used for mounting of devices for harnessing solar energy both in landscape and portrait orientation, and only requires rotation over 90°. It guarantees that a screw driven through the screw insertion point of the positioning body passes through the plate impermeable to liquid water below it at an elevated area thereof. The centre-to-centre dis- tances of the grooves are generally in the range of 1 to 8 cm, preferably 2 to 5 cm. The screw insertion point is preferably a recess with reduced material thickness - allowing for both positioning of the point of the screw and quick penetration of the positioning body

- and more preferably a hole. The invention also relates to a clamp guiding body suitable for use in the method according to the invention, wherein said clamp guiding body comprises a pair of parallel, longitudinally extending walls, at least one of the walls of the pair being provided with a flange member, the walls and the flange member capable of - retaining a nut between the walls, allowing translational movement of said nut between the walls, but - preventing rotation of said nut. Preferably, the clamp guiding body is rotatably connected to a positioning body as defined above or connectable at the front side of a positioning body as defined above in two orientations that are perpendicular to each other. Finally, the invention relates to a prefab roof element provided with devices for harnessing solar energy comprising at least one planar body comprising a material in which a screw can be driven and a corrugated plate impermeable to liquid water, said corrugated plate having a front side and a back side and the at least one planar body is provided at the back of the corrugated plate, wherein

- at locations where clamps for clamping the devices for harnessing solar energy are attached to the material in which a screw can be driven, said material in which a screw can be driven is present, - at least two parallel grooves immediately adjacent to a parallel elevated area of the corrugated plate rest on top of and against the at least one planar body, and a multitude of parallel elevated areas having two adjacent grooves resting on top of and against the at least one planar body exist, the devices for harnessing solar energy being clamped to the at least one planar body with screws through the plate into the at least one planar body at said parallel elevated areas of the corrugated plate which have two adjacent grooves resting on top of and against the planar body, as can be manufactured using the method according to the invention.

Such prefab roof elements can be transported to a building under construction or being renovated such as a house, and mounted. An important advantage is that less time needs to be spent in, what could be, adverse weather conditions. The prefab roof element itself can be constructed in a factory, and at reduced height, improving the speed and working safety. If there is a plurality of planar bodies, they will be interconnected to form a' frame.

The present invention will now be illustrated with reference to the drawings, wherein Fig. la-f depict a method of mounting a multitude of PV panels to the roof of a house;

Fig. 2 shows a cross-sectional view of a part of a roof provided with PV panels mounted in landscape orientation; Fig. 3 shows an exploded view of a clamp used for the method according to the invention;

Fig. 4 shows a top view of a positioning body with a clamp base of a clamp suitable for portrait oriented mounting of a PV panel; Fig. 5 shows a side view of a positioning body together with a part of a clamp comprising the clamp base of fig. 4;

Fig. 6 shows a perspective view of a preferred embodiment of a positioning body, a clamp guiding body and a clamp with two different clamp tops; Fig. 7 shows a top view on the embodiment of fig. 6 without the top clamp parts;

Fig. 8 shows a cross-sectional view of the embodiment of fig. 7 along line VIII-VIII;

Fig. 9 shows a top view of a clamp clamping two devices for harnessing solar energy;

Fig. 10 shows a cross-sectional view of the embodiment of fig. 9 along line X-X used for portrait orientation of a device for harnessing solar energy with clamped solar panels attached to a plank; and Fig. 11 shows a prefab roof element according to the invention.

Fig Ia shows a part of a slanting roof 100 of a house to be fitted with PV panels, the roof 100 being stripped of roof tiles T, revealing tile laths 101. The tile laths 101 are provided (fig. Ib) with planar bodies comprising a material in which a screw can be driven, here wooden planks 102 that run substantially perpendicular to the substantially horizontal tile laths 101. A suitable thickness of the planks 102 is, for example, 19 mm and a convenient width is, for example, 12 cm. Instead of wooden planks 102 a large plate such as multiplex board could have been used, but most of the surface area and strength of the large plate would not be used, which would constitute a waste of material. The planks 102 are covered (fig. Ic) by a plate impermeable to liquid water, in this case a corrugated plastic plate 103. The corrugated plastic plate 103 has parallel grooves 104 and parallel elevated areas 105 between the parallel grooves 104, and the grooves 104 are substantially perpendicular to the tile laths 101, allowing drainage of any water such as rain water that is collected on the corrugated plastic plate 103. To make sure that any water collected on the corrugated plastic plate 103 is passed to the tiles T, a lead plate 169 is provided before the corrugated plastic plate 103 is attached (the contour of the lead plate 169 behind the corrugated plastic plate 103 is shown with a broken line in fig. Ic) . In general, before actual mounting of PV panels is performed, the corrugated plastic plate 103 will be attached to the planks 102 provisionally using screws 106 which will be driven through the parallel elevated areas 105 to avoid that any water may reach the tile laths 102. A suitable height of the corrugated plastic plate 103 is, for example, 9 mm. If a corrugated metal plate was used, it may be advantageous to have a rubber ring between the head of the screw and the corrugated metal plate to reduce the likelihood of water passing below the plate via the screw hole.

The location of the planks 102 was chosen such that

- at locations where clamps 107 (fig. ld-f; fig. 2) for clamp- ing the PV panels 108 are to be attached to the material in which a screw can be driven, said planks 102 are present,

- at least two parallel grooves 104 immediately adjacent to a parallel elevated area 105 rest on top of and against the plank 102. The PV panels 108 are attached to the planks 102 using clamps 107 (fig. ld-f) . These clamps 107 are attached to a positioning body 109 having protrusions 110 (fig. 3) facing the corrugated plastic plate 103 and meshing with the parallel grooves 104. The positioning body 109 has two screw insertion points (holes 111) to facilitate driving in a screw at a parallel elevated area 105 on the corrugated plastic plate 103. The holes 111 lie between the protrusions 110, as a result of which the position of a screw driven through a hole 111 is restricted to a point over the parallel elevated area 105 having two adjacent parallel grooves 104. All the person in charge of mount- ing PV panels 108 has to do is to choose a position for the positioning body 109 such that it rests on top of and against a plank 102 (with the corrugated plastic plate 103 sandwiched in between) . Generally two clamps 107 will be used per long side of a PV panel, each clamp 107 being positioned at approximately l/4th of the length of the PV panel from a short edge of the PV panel. With a width of the plank 102 of, for example 12 cm, and the distance between two parallel grooves 104 of, for example 32 mm, a plank 102 offers ample opportunity to select a suitable position for the positioning body 109, even if by coincidence a screw used to attach the plank 102 to a tile lath 101 is present at the exact spot of a hole 111. In the direction of the parallel grooves 104, the positioning body 109 can be selected at will. A clamp 107 comprises a clamp base 120, and a top part 121. The clamp base 120 comprises two holes 122, through which screws 123 (fig. 3) are driven that pass the holes 111. Thus, the corrugated plastic plate 103 and the positioning body are sandwiched between the clamp base 120 and the plank 102. Now, an edge 130 of a PV panel 108 is placed over the positioning body 109, and the top part 121 of the clamp 107 is attached to the clamp base 120 using a socket screw 131. The top part 121 has wings 128 at at least one side thereof, which wings 128 are over the edge 130 of the PV panel 108, with a piece of rubber 132 to prevent any damage to the PV panel 108. Fig. Id and Ie show the roof during mounting of a PV panel 108, while fig. If shows the finished roof, provided with 4 PV panels 108.

Fig. 2 shows this in a cross-sectional view through part of a slanting roof provided with PV panels 108 in landscape orientation, the edges 130 of PV panels 108 being clamped between clamp 107 and the plank 102. Fig. 3 shows an exploded view of the positioning body 109 with holes 111, the clamp base 120 which is to be screwed to a plank 102, and the top part 121 which is to be bolted to the clamp base 120 using socket screw 131. The protrusions 110 of the positioning body 109 have been designed to accommodate for grooves of the corrugated plas- tic plate 103 in two perpendicular directions, allowing this positioning body 109 to be used for both landscape and portrait mounting of PV panels 108.

If it is desired to mount PV panels in portrait orientation, the clamp base of the clamp may be provided with slots 333 (fig. 4) in foot members 334 of a clamp base 320 to allow continuous positioning of the clamp base 320 before it is fixed to the plank 102. This is shown in fig. 4, which displays the clamp base 320 on top of 1 positioning body 309 only. This figure also shows a threaded hole 353 for a socket screws used to connect the top clamp part (not shown) to the clamp base 320. Fig. 5 shows a side view through a clamp base 320 placed on top of a positioning body 309. In fig. 5 the clamp base 320 has been moved to the far left to demonstrate the freedom of positioning allowed by the slots 333 (fig. 4). The screw 323 is driven through the slot 333 into the plank 102 (not shown) . The protrusions 310 of the positioning body 309 have been designed to accommodate for grooves of the corrugated plastic plate 103 in two perpendicular directions, allowing this positioning body to be used for both land- scape and portrait mounting of PV panels 108.

As with existing systems, aluminium profiles may be used to cover any gap to the right and/or left of the array of devices for harnessing solar energy for drainage of rain water and to ensure fire safety. To reduce the distance between the solar panels and the tiles above or below the array of devices for harnessing solar energy, clamps may be used with only one wing (such as shown in fig. 6; 668a) , the basis of the positioning body will have accordingly smaller dimensions.

Fig. 6 shows a positioning body 609 having protrusions 610 at a first side thereof, and with screw insertion points (holes) 611. A clamp guiding body 661 will be placed over the second side of the positioning body 609. The clamp guiding body 661 has screw insertion points (holes) 662 also, and these coincide with those of the positioning body 609, irrespective of whether the clamp guiding body 661 is in the orientation shown in fig. 6 or rotated over 90° in the plane of the second side of the positioning body 609. In the orientation shown in fig. 6 the set-up is in particular suitable for devices in landscape orientation. When a device for harnessing solar energy is to be mounted, the clamp guiding body 661 is screwed to the mate- rial in which screws can be driven (shown in fig. 8), sandwiching the corrugated plate and positioning body between the material and the clamp guiding body 661. The clamp guiding body 661 has pairs of parallel, longitudinally extending walls 663, 663' and in the embodiment shown each of the walls 663, 663' of the pair of walls is provided with a longitudinally extending flange 664, 664' respectively. Thus a guiding is created capable of retaining a nut 665 (as the first threaded organ in the claim) , and while it can move between the walls 663, 663' , it is retained between those walls 663, 663' by the flanges 664, 664' and the walls 663, 663' . The walls 663, 663' also prevent the nuts 665 from rotating, the reason for which will become clear shortly.

A clamp base 666 is placed on top of the clamp guiding body 661. Second threaded bodies, bolts 667, are used to clamp the clamp base 666 to the clamp guiding body 661. While the bolts 667 and nuts

665 are only slightly engaged, the clamp guiding body can be moved to the required position. Because the nuts 665 are not readily accessible, the walls 663, 663' prevent the nuts 665 from rotating, allowing easy engaging. Then the bolts 667 and nuts 665 are further engaged, clamping the clamp 666 to the guiding body 661.

To mount a device for harnessing solar energy, a top clamp part 668 with two wings 671, 672 (or 688a in case the top clamp part 668 has to hold only 1 device for harnessing solar energy and therefore needs only one wing 671a will be bolted to the clamp base 666 using bolt 669 (fig. 9 and 10) . To this end, the clamp base 666 is provided with a thread in any manner known in the art.

In Fig. 9 a top view is visible of two devices for harnessing solar energy Dl and D2 (partially shown) , clamped in portrait orien- tation to a plank 602. Fig. 9 shows the top clamp part 668 with wings 671 and 672.

In fig. 10 a cross-sectional view is shown of the complete stack (along line X-X in fig. 9), comprising a plank 602 (material in which a screw can be driven), the plastic corrugated plate 603, the positioning body 609 on top of the plastic corrugate plate 603, the clamp guiding body 661 on top of the positioning body 609 affixed to the plank 602 with screws 606, the clamp base 666 on top of the clamp guiding body 661, the top clamp part 668 connected to the clamp base

666 by bolt 669, and the devices for harnessing solar energy Dl and D2 are sandwiched between the wings 671, 672 of the top clamp part

668.

Fig. 6 and fig. 8 show a connecting device 690 that allows the positioning body 609 and clamp guiding body 661 to be rotated with respect to each other while being connected. This makes it more con- venient to handle on rooftops and is also logistically convenient.

Top clamp part 668 does not need to engage the clamp base 666, but if the top clamp part 668a is used, it is preferred that it does engage the clamp base 666 to prevent tilting of the top clamp base part 668a. Fig. 11 shows a prefab roof element comprising a planar multiplex plate 202 covered with a corrugated plastic plate 103, and four PV panels 108 attached to the planar multiplex plate 202. The planar multiplex plate 202 will be bolted or screwed to a roof.

Claims

C L A I M S
1. A method of mounting a multitude of devices for harnessing solar energy (108) wherein
- at least one planar body (102) comprising a material in which a screw can be driven is provided with a plate impermeable to liquid water (103), said plate (103) having a front side and a back side, wherein the front side of the plate (103) has parallel grooves (104) and parallel elevated areas (105) between the parallel grooves, such that
- at locations where clamps (107) for clamping the devices for harnessing solar energy are to be attached to the material in which a screw can be driven, said material in which a screw can be driven is present,
- at least two grooves (104) immediately adjacent to a parallel elevated area (105) rest on top of and against the at least one planar body (102), and a multitude of parallel elevated areas (105) having two adjacent grooves resting on top of and against the at least one planar body (102) exist,
- the devices for harnessing solar energy are clamped to the at least one planar body (102), said clamping involving placing the devices for harnessing solar energy (108) over the plate (103) and driving screws (106) through the plate (103) into the at least one planar body (102) at said parallel elevated areas (105) of the plate which have two adjacent grooves resting on top of and against the planar body.
2. The method according to claim 1, wherein the centre-to-centre dis- tance between the parallel grooves is less than 5 cm.
3. The method according to claim 2, wherein the plate (103) is nestable.
4. The method according to claim, wherein the nestable plate is a corrugated plate.
5. The method according to any of the claims 2 to 4, wherein a positioning body (109) is used having a screw insertion point (111) to facilitate driving in a screw (106) at a parallel elevated area (105) on the plate (103), the positioning body having a back side for fac- ing the plate and a front side, the back side being provided with protrusions (110) to mesh with the two parallel grooves (104) adjacent to the parallel elevated areas (105) , restricting the position of the screw insertion point (111) to a point over the parallel elevated area (105) having two adjacent parallel grooves resting on top of and against the at least one planar body (102) .
6. The method according to claim 5, wherein the screw insertion point (111) is a hole for the screw.
7. The method according to claim 5 or 6, wherein the front side of the positioning body comprises a pair of parallel, longitudinally extending walls, at least one of the walls of the pair being provided with a flange member, the walls and the flange member capable of retaining a first threaded connection organ between the walls,
- allowing translational movement of said first threaded connection organ between the walls, but
- preventing rotation of said first threaded connection organ, wherein a device for harnessing solar energy is clamped using clamps, a clamp comprising a clamp base and a top clamp part, wherein the clamp base comprises a hole for clamping the clamp base to the positioning body using the first threaded connection organ and a second threaded connection organ capable of cooperating with said first connection organ; the mounting of the device for harnessing solar energy involving
- engaging the first and second threaded connection devices to prohibit the translational movement of the first threaded connection organ when the clamp base has been clamped at a desired location; and sandwiching the device for harnessing solar energy between the clamp base and the top clamp part.
8. The method according to claim 5 or 6, wherein a clamp guiding body comprising a pair of parallel, longitudinally extending walls, at least one of the walls of the pair being provided with a flange member, the walls and the flange member capable of retaining a first threaded connection organ between the walls, - allowing translational movement of said first threaded connection organ between the walls, but
- preventing rotation of said first threaded connection organ; on top of the positioning body is attached to the planar body by driving screws through the positioning body at the locations of screw insertion points, wherein a device for harnessing solar energy is clamped to the clamp guiding body using clamps, a clamp comprising a clamp base and a top clamp part, wherein the clamp base comprises a hole for clamping the clamp base to the positioning body using the first threaded connection organ and a second threaded connection or- gan capable of cooperating with said first connection organ; the clamping of the device for harnessing solar energy involving clamping the clamp guiding body to the positioning body by engaging the first and second threaded connection devices to prohibit the translational movement of the first threaded connection organ when the clamp base has been clamped at a desired location; and
- sandwiching the device for harnessing solar energy between the clamp base and the top clamp part.
9. The method according to claim 8, wherein the clamp guiding body is rotatably connected to the positioning body or connectable at the front side of the positioning body in two orientations that are perpendicular to each other.
10. The method according to claim 5 or 6, wherein - a clamp base (120) for attaching a top clamp part (121) is placed on top of the positioning body (109), the clamp base comprising a slot (333) to serve as' a guiding for the screw (106) inserted into the slot and partially driven through the positioning body into the planar body (102) of the material in which a screw can be driven, said guiding allowing for movement of the clamp base (120) in a lateral direction with respect to the parallel grooves (104) of the plate (103), - the screw (106) is driven deeper into the material in which a screw can be driven, fixing the clamp base (120) with respect to the positioning body (109), and
- the top clamp part (121) is attached to the clamp base so as to clamp a device for harnessing solar energy (108) to the planar body.
11. The method according to claim 5 or 6, wherein the positioning body comprises a clamp base, and the positioning body comprising the clamp base is attached to the planar body comprising a material in which a screw can be driven by driving a screw into the plate at the screw insertion point.
12. The method according to any of the preceding claims, wherein the plate is a plastic plate.
13. The method according to any of the preceding claims, wherein the at least one planar body is attached to a member chosen from i) a building, such that the parallel grooves slope downwardly, and ii) a prefab roof element.
14. The method according to claim 13, wherein the at least one planar body (102) is attached to and on top of tile laths (101) .
15. The method according .to claim 12, wherein a plurality of planar bodies (102) is used and the planar bodies being downwardly sloping planks connecting tile laths (101), and the plate (103) being rigid in at least one direction of the plate, said direction corresponding to the direction of the planar bodies.
16. The method according to any of the preceding claims, wherein the device for harnessing solar energy is a PV solar panel.
17. Positioning body (109) suitable for use in the method according to any of the claims 1 to 16, wherein said positioning body has - a first side provided with at least four protrusions (110) defining at least one first groove to mesh with a plate impermeable to liquid water, said plate having parallel grooves and parallel elevated areas between the parallel grooves, and at least one second groove perpendicular to the at least one first groove for meshing with said plate (103),
- a second side having a screw insertion point (111) to facilitate driving in a screw (106), which screw insertion point (111) is lo- cated over the at least one of the first groove and the second groove .
18. Positioning body suitable for use in the method according to claim 7, wherein said positioning body has - a first side provided with at least two protrusions defining a groove to mesh with a corrugated plate (103),
- a second side having a screw insertion point (111) to facilitate driving in a screw (106), which screw insertion point (111) is located over the at least one of the first groove, the second side of the positioning body comprising a pair of parallel, longitudinally extending walls, at least one of the walls of the pair being provided with a flange member.
19. Clamp guiding body suitable for use in the method according to claim 8 or 9, wherein said clamp guiding body comprises a pair of parallel, longitudinally extending walls, at least one of the walls of the pair being provided with a flange member, the walls and the flange member capable of
- retaining a nut between the walls, - allowing translational movement of said nut between the walls, but
- preventing rotation of said nut.
20. Clamp guiding body according to claim 19, wherein the clamp guid- ing body is rotatably connected to a positioning body as defined in claim 18 or connectable at the front side of a positioning body as defined in claim 18 in two orientations that are perpendicular to each other.
21. Prefab roof element provided with devices for harnessing solar energy (108) comprising at least one planar body (202) comprising a material in which a screw can be driven and a corrugated plate impermeable to liquid water (103), said corrugated plate having a front side and a back side and the at least one planar body is provided at the back of the corrugated plate, wherein
- at locations where clamps (107) for clamping the devices for harnessing solar energy are attached to the material in which a screw can be driven, said material in which a screw can be driven is present,
- at least two parallel grooves (104) immediately adjacent to a parallel elevated area of the corrugated plate rest on top of and against the at least one planar body, and a multitude of parallel elevated areas (105) having two adjacent grooves (104) resting on top of and against the at least one planar body exist, the devices for harnessing solar energy being clamped to the at least one planar body with screws (106) through the plate (103) into the at least one planar body (202) at said parallel elevated areas of the corrugated plate which have two adjacent grooves resting on top of and against the planar body, as can be manufactured using the method according to any of the claims 1 to 16.
PCT/NL2010/000090 2009-06-03 2010-06-01 A method of mounting a multitude of devices for harnessing solar energy, a positioning body for use in said method, a clamp guiding body, and a prefab roof element WO2010140878A2 (en)

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NL1037010 2009-06-03

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FR2982350A1 (en) * 2011-11-03 2013-05-10 3I Plus Fastening device for fastening solar panel on roof of e.g. industry, has spacer for smoldering two successive corrugations, where lower part of spacer represents shape that is formed partial complementary to corrugations
JP2014111876A (en) * 2012-11-05 2014-06-19 Ever Kk Mounting bracket for solar cell module
US10443896B2 (en) 2016-07-29 2019-10-15 Rmh Tech Llc Trapezoidal rib mounting bracket with flexible legs

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