DE102009052001A1 - Support arrangement for photovoltaic modules - Google Patents

Abstract

The invention relates to a support arrangement for photovoltaic modules, in particular large-area thin-film solar modules, with a ram floor support and a connecting means which is located between the upper end of the support remote from the floor and the underside of the module. According to the invention, the connecting means is fixed in the center of gravity of the respective module and designed as a sleeve or plug-in part, the contour of the sleeve or plug-in part of the outer or inner contour of at least one fastening section of the ram floor support being complementary in order to fix the module to the support in a manner secured against rotation.

Description

The invention relates to a support arrangement for photovoltaic modules, in particular large-area thin-film solar modules, with a Rammbodenstütze and a connecting means, which is located between the upper, bottom-distal end of the support and the module base, according to the preamble of patent claim 1.

From the DE 20 2006 011 393 U1 a support arrangement for solar systems is already known, which receives a plurality of solar modules. The known support system has a plurality of spaced in a row in a horizontal longitudinal direction floor supports with a longitudinally elongated support arrangement, said support assembly is mechanically contacted with the floor supports via connecting elements. Furthermore, transversely to the longitudinal direction and against the horizontal sloping module carrier are present, on which the solar modules rest. Specifically, the side rail assembly has two longitudinal members spaced transversely to the longitudinal direction, and the module supports are each held on the two side members. The design effort for the respective solar module is significant, which leads to a deterioration of the cost-benefit aspect when building a solar system based on this technology.

Also, the support structure of a solar array for one or more solar modules after DE 203 19 065 U1 extends from longitudinally spaced base supports anchored to the base, at least one longitudinal side rail mounted on the first supports, and a plurality of longitudinally spaced transverse beams inclined transversely to the longitudinal direction and inclined horizontally in a transverse direction are fastened to the longitudinal member, off. All the above-mentioned structural elements must be mechanically connected, usually screwed, resulting in considerable time for the construction of a large-scale solar system and thus in turn entails increased costs.

In the utility model DE 20 2007 016 396 U1 is oriented with the aim of simplifying the manufacturing and construction effort on a concrete element for a foundation-free installation of solar cells on surfaces, in particular outdoor facilities. The concrete element consists of a molded stone element and arranged troughs for attaching transport systems. Furthermore, attachment points for supporting the structure are provided, on which the solar cells are then fixed. The weight of the concrete block should be sufficient to compensate for wind and snow loads, so that an overall system based on such support elements can not be destroyed by the aforementioned loads.

In the system for fixing roof elements including those containing solar cells according to DE 103 29 184 A1 the components to be connected are each provided at the connection points with the corresponding parts of a pressure-sensitive adhesive connector. These corresponding parts of the adhesive connector are flexible and attachable by gluing. It is also possible to attach the corresponding parts of the adhesive connector form-fitting. By such Velcro connection techniques should be given the opportunity to perform a mounting of the components without special tools.

The mounting system after DE 20 2008 015 237 U1 aims in particular for frameless thin-film modules. This known system has two profile-shaped cross rails, which are arranged in parallel spaced and are provided for holding a plurality of photovoltaic modules. Each of the cross rails has a flat support surface. Furthermore, there are a plurality of holders, each fixedly connected to the back of a module using an adhesive. The respective photovoltaic module is mounted by means of the holder on the cross rails, for which each cross rail is assigned at least one holder and each holder has a recess and each cross rail has an integrated projection.

In order to prevent a displacement of the holder against the joining direction, a retaining device is provided between at least one transverse rail and a holder associated therewith. The holders should be arranged at locations in the interior of the back of the PV module, which are chosen so that the module undergoes minimal deflection in the operating position.

Regardless of the intended holder, the mounting system requires DE 20 2008 015 237 U1 a supportive, net-like and thus very complex support structure.

From the foregoing, it is therefore an object of the invention to provide a further developed support arrangement for photovoltaic modules, in particular large-scale thin-film solar modules, with a Rammbodenstütze and a connecting means which is located between the upper, distal end of the support and the module base, the support assembly on the one hand based on the solar system total system only low production costs entails and on the other hand, the cost of installing a variety of solar modules for or when building a solar power plant is minimized.

The object of the invention is achieved by a support arrangement for photovoltaic modules according to the feature combination according to claim 1, wherein the dependent claims represent at least expedient refinements and developments.

The inventions explained in the claims application finds particular application in the attachment of solar modules in open space systems, in which case the challenge is to achieve the most cost-effective attachment of the solar modules, with an orientation to the south with a tilt angle that depends on the latitude of the plant to be built , has to be done. In addition, a minimum distance to the underlying soil should be given to avoid unwanted shading of the solar cells by plant growth. Ultimately, the attachment of the solar modules should be so stable that the entire system sustained attacking wind and / or snow loads permanently. The support assembly according to the invention has as a connecting means between Rammbodenstütze and the respective photovoltaic module on a sleeve or a male part, wherein the contour of sleeve or male part of the outer or inner contour of at least one mounting portion of the Rammbodenstütze is complementary to the module against rotation on the support in a simple manner z. B. pinning to be able to fix.

Furthermore, according to the invention, a single Rammbodenstütze is provided for each solar module, forming within a field of solar modules, a solar system, the individual modules are not mechanically interconnected, as is the case in the prior art.

Sleeve or plug-in part and outer or inner contour of the Rammbodenstütze are preferably deviating from the circular cross-section to prevent twisting of the respective solar module about the longitudinal axis of the floor support without additional securing means.

In one embodiment, the respective solar module can have a frame, which on the force side is part of the connection means. In particular, the frame may have at least one supporting beam.

The sleeve or the male part is then attached to the frame and / or the supporting beam, preferably cohesively.

In a further embodiment, frameless thin-film modules are used as so-called glass-glass laminates for the solar module. In this case, there is the possibility that the sleeve or the plug-in part is directly materially connected to the back of the glass-glass laminate.

The sleeve or the plug-in part can be fixed at a selectable angle between the longitudinal axis of the sleeve or plug-in part and the surface plane of the respective solar module. Prefabricated sleeves or plug-in parts can be used with a mounting surface as a standardized component use. Depending on the degree of latitude, these prefabricated standard components have a defined angle at the intended place of use which corresponds to the desired angle of inclination.

In the production finalization of the solar modules then the respective sleeves or plug-in parts can be fixed according to the specification of the purchaser. This would reduce the installation of the solar modules on a plugging or plugging based on the introduced on the ground Rammbodenstütze.

In the elevated state, the solar modules should have the smallest possible distance to the ground surface, the choice of the distance is only vegetation-dependent.

In addition, the individual solar modules of a solar system are set up shaded each other objected to each other, the respective distance in horizontal, d. H. lateral direction, for the purpose of reducing the total wind load is also to be minimized.

In a preferred embodiment, a metallic profile post, in particular a sigma post, is used as the ram bottom support.

The invention will be explained in more detail below with reference to an embodiment and a schematic diagram (Figure).

Known solutions of the prior art aim, as described above, to create for open space solar systems initially net-like supporting occupancy fields with south-facing. The formed net-like arrangements, which are partially matched to the outer dimensions of the solar modules to be installed, are then occupied with individual modules.

Due to the market launch of silicon thin-film solar modules with very large dimensions of up to 6.0 m ² and larger, but still low efficiency of the usual constructive approach to the attachment and training of open space systems is not economically justifiable.

The basic idea of the invention is the departure from netlike Support structures towards fixing each solar module using a Rammfundaments, in particular a Rammbodenstütze, each module then has a connection to the respective ground anchor or the Rammbodenstütze.

The proposed solution according to the invention therefore decouples via the individual attachment of the solar modules to the respective ground anchor module geometry and module efficiency of the resulting costs. For this reason, the system is particularly suitable for large, lower area efficiency solar panels, which would not benefit from the module size advantage of alternative planar support systems, due to high stack-up costs.

As can be seen from the figure, each large-area thin-film solar module has 1 via a connecting means 2 at the bottom of the solar module 1 is attached.

The connecting means 2 goes in the example shown in a sleeve 3 above.

The inside opening of the sleeve 3 is on the outside diameter of a Rammbodenstütze 4 Voted. As Rammbodenstütze 4 a known sigma post can be used which is sufficiently deep in the soil 5 is driven.

In the example shown, the longitudinal extent of a solar module 1 about 130 cm up.

The smallest distance between the lower edge of the solar module 1 and the surface of the soil 5 is z. At ≥ 55 cm.

This distance is matched to the expected growth. In order to minimize occurring wind loads, however, the principle applies to keep the height of the elevation basically low. Likewise, the distance between the individual modules 1 be given only among themselves under the aspect of shading, which must be avoided. Again, wind suction and / or pressure forces are reduced if the individual solar modules are as close as possible and thus form a quasi-closed area.

In addition to the cost advantage results in view of the sleeve according to the embodiment, a lower installation costs for the Rammfundamente due to relaxed requirements for accuracy with respect to positioning and angularity.

Furthermore, the assembly effort is reduced by the fact that the sleeve acting as an adapter or the plug-in part is preferably materially connected to the module on the production side. This only a Aufsteck- and Arretiertätigkeit in the field is necessary. With regard to the principle of the individual elevation of the effort in adapting to different terrain topographies is significantly reduced. It is also possible to use it on unstable substrates such as landfills or landfills. Due to the fact that the overall height is minimized, there is only a minor influence on the landscape.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 202006011393 U1 [0002]
• DE 20319065 U1 [0003]
• DE 202007016396 U1 [0004]
• DE 10329184 A1 [0005]
• DE 202008015237 U1 [0006, 0008]

Claims (10)

Support arrangement for photovoltaic modules, in particular large-scale thin-film solar modules, with a Rammbodenstütze and a connecting means, which is located between the upper, distal end of the support and the module base, characterized in that the connecting means fixed in the center of gravity of the respective module and formed as a sleeve or plug-in part is, wherein the contour of the sleeve or male part of the outer or inner contour of at least one mounting portion of the Rammbodenstütze is complementary to fix the module against rotation secured to the support. Supporting arrangement according to claim 1, characterized in that a single Rammbodenstütze is provided for each solar module, wherein forming a solar system within a field of solar modules, the individual modules are not mechanically interconnected. Supporting arrangement according to claim 1 or 2, characterized in that sleeve or plug-in part as well as outer or inner contour of the Rammbodenstütze are deviating from the circular cross-section. Supporting arrangement according to one of the preceding claims, characterized in that the respective module is frameless or comprises a frame, which is on the force side part of the connecting means. Supporting arrangement according to one of the preceding claims, characterized in that the frame has at least one supporting beam. Carrying arrangement according to claim 4 or 5, characterized in that the sleeve or the plug-in part on the frame and / or the supporting beam or directly on the back of the frameless module is firmly bonded. Supporting arrangement according to one of the preceding claims, characterized in that the sleeve or the plug-in part is fixed at a selectable angle between the sleeve or plug-in longitudinal axis of the surface plane of the respective solar module at this. Supporting arrangement according to one of the preceding claims, characterized in that in the elevated state of the lowest point of the respective solar module has a vegetation-only, the smallest possible distance to the ground surface. Supporting arrangement according to one of claims 2 to 8, characterized in that the individual solar modules of a solar system are placed shading spaced, wherein the respective distance for the purpose of reducing the total wind load is minimized. Supporting arrangement according to one of the preceding claims, characterized in that the Rammbodenstütze is designed as a metallic post, in particular sigma post.

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