EP2366196A1 - Einrichtung zum tragen von fotovoltaiczellenpanels, trägersystem und installierte baugruppe - Google Patents

Einrichtung zum tragen von fotovoltaiczellenpanels, trägersystem und installierte baugruppe

Info

Publication number
EP2366196A1
EP2366196A1 EP09793554A EP09793554A EP2366196A1 EP 2366196 A1 EP2366196 A1 EP 2366196A1 EP 09793554 A EP09793554 A EP 09793554A EP 09793554 A EP09793554 A EP 09793554A EP 2366196 A1 EP2366196 A1 EP 2366196A1
Authority
EP
European Patent Office
Prior art keywords
photovoltaic cell
panels
photovoltaic
central trunk
support
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP09793554A
Other languages
English (en)
French (fr)
Inventor
Alain Poivet
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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
Application filed by Individual filed Critical Individual
Publication of EP2366196A1 publication Critical patent/EP2366196A1/de
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02SGENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED 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
    • 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
    • F24S25/20Peripheral frames for modules
    • 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
    • F24S25/30Arrangement of stationary mountings or supports for solar heat collector modules using elongate rigid mounting elements extending substantially along the supporting surface, e.g. for covering buildings with solar heat collectors
    • F24S25/33Arrangement of stationary mountings or supports for solar heat collector modules using elongate rigid mounting elements extending substantially along the supporting surface, e.g. for covering buildings with solar heat collectors forming substantially planar assemblies, e.g. of coplanar or stacked profiles
    • F24S25/35Arrangement of stationary mountings or supports for solar heat collector modules using elongate rigid mounting elements extending substantially along the supporting surface, e.g. for covering buildings with solar heat collectors forming substantially planar assemblies, e.g. of coplanar or stacked profiles by means of profiles with a cross-section defining separate supporting portions for adjacent modules
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24SSOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S40/00Safety or protection arrangements of solar heat collectors; Preventing malfunction of solar heat collectors
    • F24S40/40Preventing corrosion; Protecting against dirt or contamination
    • F24S40/44Draining rainwater or condensation
    • 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
    • F24S2025/021Sealing means between support elements and mounting surface
    • 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
    • F24S2025/80Special profiles
    • F24S2025/801Special profiles having hollow parts with closed cross-section
    • 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]
    • 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, e.g. solar towers
    • Y02E10/47Mountings or tracking
    • 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
    • Y02E10/50Photovoltaic [PV] energy

Definitions

  • Support device for photovoltaic cell panels support system and installed assembly.
  • the present invention relates to a device for fixing photovoltaic cells.
  • a support device for photovoltaic cell panels an installation implementing these panels, in the context of the so-called “integration” regulation of photovoltaic cells on roofs, and a set comprising one and / or one other installed on the facade of a building, or on a roof.
  • Schuco registered trademark
  • the photovoltaic panels are placed on a steel tank, which is not in accordance with the spirit of the "integration" regulation, since the coverage is not replaced by the photovoltaic system .
  • Schuco registered trademark
  • MSK registered trademark proposes a system that has the advantage of providing panels whose aluminum frame is designed to provide a first seal.
  • the MSK (registered trademark) system is designed for small systems, such as single-family houses. It is designed for short lengths, low ventilation, with little water evacuation and designed to be mounted on specially designed timber frames. The circulation of cables is not planned.
  • the sealing solution relies on the sealing between photovoltaic panels, but does not provide additional protection. Thermal insulation is not integrated.
  • Schuco registered trademark
  • MSK registered trademark
  • German patent application DE202005007855 which describes a device for supporting photovoltaic cell panels with a section for holding the panels extending in a first direction, fixed on a second section forming a spacer, extending in a second direction. perpendicular to said first direction.
  • JP2000154625 and JP1 10103224 are still known, which describe photovoltaic panel holding profiles consisting of an assembly of low joists, on which are referred to panel holding frames. These solutions are not satisfactory either because they do not allow to properly evacuate the hot air resulting from heating solar panels. Object of the invention
  • the aim of the invention is to allow the installation of photovoltaic cell panels by taking into account at least some or all of these six problems, in order to allow a technically appropriate integration for the replacement of conventional roofs.
  • the invention aims at remedying the disadvantages of the solutions of the prior art, by improving convective air circulation or by mechanical ventilation, in open chambers formed between the building surface and the rear surface of the photovoltaic panels.
  • these rooms are partitioned laterally by the profiles to form hot air evacuation channels.
  • the invention thus relates in particular to a device for supporting photovoltaic cell panels, consisting of a profile with a height of between 5 cm and 25 cm, comprising a central trunk, two gutters symmetrical with respect to the support and skirting the profile on its entire length, a holding rail at the base and means for fixing two panels of photovoltaic cells.
  • this "height" H will be that of the central trunk.
  • the support rail at the base of the central trunk supports or is taken in a rigid or semi-rigid thermal insulation
  • the thermal insulation is covered with a sheet of impermeability going up along the central trunk to ensure a second level of impermeability
  • Two gutters are placed in the lower part of the central trunk of the profile to allow a support of cable trays;
  • the invention also relates to a photovoltaic panel support system, employing two photovoltaic cell panel support devices, wherein the two photovoltaic cell panel support devices are installed in parallel in a width-defined spacing. of the photovoltaic cell plate to be installed.
  • a connecting piece makes it possible to connect the ventilation zone to an air extraction device in order to recover the heat produced by the operation of the photovoltaic cell panels;
  • a connecting piece makes it possible to connect the ventilation zone to an air blower device in order to evacuate the heat produced by the operation of the photovoltaic cell panels.
  • the rail ensures the mechanical fixing of the roofing or facade elements. On roof, it rests on transverse structural failures, whose spacing will be calculated according to the climatic constraints of the place, or on longitudinal rafters in the case of traditional wooden framework.
  • the photovoltaic panels are screwed on the rail at the top, which gives a very high structural rigidity to all and a guarantee of non-corrosion.
  • the system of the rails makes it possible to obtain a perfectly flat panel installation surface, whatever the deformations or irregularities of the framework, thanks to a setting system adjustable at each point of support. A laser adjustment can be made during the installation of the rails so as to obtain perfect flatness.
  • Approved resilients are placed at the points of contact between the aluminum rail and the steel structures to avoid chemical problems.
  • the rail is complemented by plastic junction pieces to both ensure flow continuity and absorb thermal expansion.
  • the waterproof sheet ensures a covering of a plate on the other preventing any leakage or rise of water. It is therefore a doubly waterproof system.
  • the airtightness is considered in two ways. Building waterproofing and system-specific sealing.
  • the watertightness of the building is ensured by the continuity of insulating plates all over the surface.
  • the system-specific sealing is what allows to consider the entire space between 2 rails as a ventilation duct.
  • the air is captive between the rails, the insulating underside and the panels at the top.
  • the transverse seal is ensured by the rails.
  • a waterproof device is put in place.
  • the purpose of the ventilation is to evacuate the calories produced by the photovoltaic system, or even to recover them for heating the building.
  • the height of the air gap under the panels allows natural convective ventilation where possible. Just be sure to put in place protections against the entry of rainwater at the ends.
  • the system includes parts to close the ducts created between the rails and to set up either air inlets on air supply or suction ducts, or ventilators type VMC (mechanical ventilation controlled). In any case, it will be necessary to ensure the good filtration of the air injected into the system.
  • Hot air circulating in the exhaust duct can be used for heating, ventilating or cooling the building.
  • the system therefore allows several configurations: natural ventilation in the open air, mechanical ventilation by suction or extraction, or dual flow ventilation.
  • the thermal insulation of the building is favorably ensured by the insulating plate placed between the rails in the lower part.
  • the insulating plate is taken from the rail sections, but it can also cover the lower part of the rail, which avoids the effect of condensation on a cold wall in the case of a heated building.
  • This plate is threaded into the rails of the rail and can then be mechanically fixed, possibly via wedges.
  • the roof or photovoltaic facade thus improves the insulation of the building by the installation of a ventilated blade of often intermediate temperature.
  • This system will also be effective in very hot country (protection against heat on the roof) in cold country (protection against the effect of cold wall).
  • the air circulating in the blade is, depending on the sun, often slightly heated by photovoltaic heat, the final temperature also depending on the flow rate of the ventilation.
  • the system makes it possible to eliminate the effects of the expansion, whether it comes from the framework or heating of the rails.
  • the length of the rails will be calculated according to the risks of expansion of the frame.
  • the plastic parts which make the connection between two rails make it possible to absorb by sliding a small longitudinal expansion movement.
  • FIG. 1 shows a sectional view of a photovoltaic cell panel support according to an exemplary embodiment
  • FIG. 2 represents a sectional view of a support of photovoltaic cell panels according to another exemplary embodiment
  • FIG. 3 represents a sectional view of a support of photovoltaic cell panels according to another exemplary embodiment
  • FIG. 4 represents a perspective view of an exemplary embodiment of a support for photovoltaic cell panels with notches for transverse gutters;
  • FIG. 5 represents an installation of photovoltaic cell plates with extraction of air
  • FIG. 6 represents an installation of photovoltaic cell plates with recovery of FIG.
  • FIG. 7 represents an exploded view of an alternative embodiment of the invention.
  • FIG. 8 represents an exploded view of a panel assembly
  • FIG. 9 shows an exploded view of the assembly of two profiles.
  • FIG. 1 represents a sectional view of the device, the support of photovoltaic cells consists of a profile, of length dimensioned according to the roof surfaces to be covered and the mechanical stresses related to the metals used.
  • the profile consists of a central trunk (1) with a height H between 5cm and 25 cm, the skilled person can determine a value by calculation.
  • Two gutters (2) are positioned on either side of the central trunk (1), the edges of said gutters rising so that the upper edges do not come into contact with the photovoltaic cell panels (5) fixed on the upper part of the central trunk (1).
  • the central trunk (I) is elongated a priori rectilinear. At its base, it presents a wider rail (3). It is preferably monobloc with this rail.
  • FIG. 2 represents an exemplary embodiment, taking again the structure described with reference to FIG. 1, but in which, two integrated or reported gutters (7) situated in the lower part, on both sides of the main trunk (1) and The same length as the length of the profile makes it possible to create a fixed cable path.
  • the rail (3) is caught in an insulator (14).
  • a sealing sheet (17) is applied to the upper surface of the insulation.
  • the sheet being here assumed to be substantially horizontally, it goes up along the central trunk (1) to a minimum height of 2 cm, preferably. 7, where the view can show as much a roof as a facade (vertical or inclined), the impermeability sheet (17) is interposed between one of the gutters (here 204) and the beams (124,125).
  • the impermeability sheet (17) is even interposed between one of the cable ducts (here 224) in the form of a chute and said beams (124 or 125).
  • this sheet (17) continues favorably (at 17a) along an outer side wall (201a) of the central trunk (201). Fixations, such as 100, keep it there. Assuming the sheet disposed substantially horizontally, it will go up along this wall.
  • the sealing sheet (17) favorably covers a layer of thermal insulation material (14).
  • Figure 3 shows another embodiment in which the central trunk (1) is drilled in the middle of holes (8) for creating crossings of transverse cables. These holes must be dimensioned by the skilled person according to the diameter of the cable or the bundling of cables to pass. The internal walls of the holes are covered with a protective material, for example a plastic ring, in order to avoid damaging passing cables and to seal them.
  • the position of these notches depends on the length of the photo voltaic cell plates installed. Those skilled in the art may, for example, place the notches at regular intervals along the support, so that the middle of the notch corresponds to the junction point of the two plates.
  • FIG. 5 shows an installation of photovoltaic cell panels.
  • an insulating plate (14) is installed between the rails.
  • Two supports (11) of photovoltaic cell plates (5) are installed in parallel, their respective rails (3) are taken in the insulator (14) over their entire length. They are fixed on the frame, possibly by means of wedging pieces.
  • the photovoltaic cell panels are installed and fixed on the upper part of the central trunk of each of the supports (11).
  • a connecting piece (12) will be placed at the end of the supports to seal the space formed by the two supports (11) and the photovoltaic cell plates (5).
  • This connecting piece is pierced at its center to allow connection of a ventilation network (13) or a blower motor (20) in the case where it is necessary to evacuate the heat, or the connecting piece can be connected to an air extraction network (15) or an extraction motor (16), as illustrated in Figure 6 to allow recovery of the heat produced by the operation of the supported photovoltaic cells.
  • the central trunk (1) is advantageously as a box and / or has with the rail (3) for maintaining an inverted T-shaped beam. This is favorable to the mechanical strength.
  • each central trunk (1) will be placed next to the beams (124) arranged on the facade of the building or on the roof considered.
  • said beams then define transverse structural failures (parallel or substantially parallel to the ridge, if it is a sloping roof).
  • FIG. 7 thus represents an exploded view of an alternative embodiment of the invention. What has just been said is valid for this variant and is seen in particular Figure 7 where it can be assumed that the beams (124,125) can define framing failures parallel or substantially parallel to the ridge (120). In this case, the / each central trunk (201) will have its elongation direction (201b) according to the slope of the roof, or substantially. If a façade is assumed, the central trunks (201) will then have their elongation direction (201b) a priori common along a vertical, or approximately.
  • the adjacent photovoltaic panels (101, 102, 103) are supported by profiles (104,
  • the profiles (104, 105) have a base (114, 115) which allows fixing by screwing on frameworks (124, 125) arranged perpendicularly to the profiles (104, 105).
  • These frames (124, 125) are existing frames on the building to be equipped with photovoltaic panels, or beams fixed on the surface of a building (facade) or a roof to allow the mounting of the profiles.
  • the profiles according to this embodiment are constituted by an extruded part made of aluminum or other suitable material, or by bent parts made of suitable material, or by any part performing the same functions.
  • the profile (104, 105) is hollow, and has a central box (134, 135) with a height of between 5 and 25 centimeters. Preferably, the height is between 15 and 25 centimeters, to form a distance sufficient to ensure a good flow of air between the building surface and the photovoltaic panels.
  • a transverse partition (144, 145) can, according to calculation, stiffen the profile (104, 105).
  • the lower part of the central trunk forming the box (134, 135) widens by a base
  • the upper part of the central trunk forming the box (134, 135) also widens by two wings (154, 164) and (155, 165) disposed on either side of the central trunk, and inclined downwards to facilitate water runoff.
  • the upper part of the profile (105) has a plane central face or portion (175), perpendicular to the median plane of the central trunk (105), which closes the top of the trunk and is extended on either side by said inclined wings (155, 165).
  • the central face (175) allows the fixing of the panels (101, 102) through their frame having a strip (106, 107, 108) for fixing by screwing.
  • a cover section (185) having a "T” section encloses the space between two adjacent photovoltaic panels, to reduce the penetration of water into the gap. This cover profile is clipped between the two adjacent panels, or screwed on the central face (175).
  • the central portion (175) and the lateral wings (155, 165) can define a single piece forming a curved rigid strip capping longitudinally the central trunk to which it can be fixed by screwing.
  • Gutters (194, 204) are provided on either side of the central trunk (134). These chutes can be integrated in the profile, or fixed on the lateral faces of the central trunk (134).
  • the chutes (194, 204) have a section greater than the width of the wings (154, 164) so as to allow the collection of runoff water flowing on said wings.
  • the width of the wings, projected on a transverse plane, is between 0.4 and 0.6 times the section of the chute.
  • the chute is a part of an insert, also formed by a profile.
  • This insert has a middle portion (234, 244) planar to be fixed on the blank of the central trunk (104). This solution allows to insert between the central blank and this insert a sealing film which is clamped between the two.
  • the central piece is extended at its lower surface opposite the chute by a cable tray (214, 224) for housing the electrical cables leading to the photovoltaic panels and other cables and fibers where appropriate.
  • Figure 8 shows an exploded view of an assembly of photovoltaic panels.
  • a thermal insulation material (200) is placed between the frame (124) and the profile (105).
  • a seal (110) provides the transverse connection, that is to say perpendicular to the profile (105) between the panels (107, 108) and the following panels (109, 110).
  • Figure 9 shows an exploded view of the assembly of two profiles.
  • a connecting piece (203) is introduced into the central trunk of the profiles.
  • This connecting piece (203) has an outer section complementary to the inner section of the central trunk.
  • the continuity between the gutters is provided by a connecting piece having a complementary section of the outer section of the gutter.
  • the beams (such as 124,125) arranged on the front of a building, or on a roof, thereby defining transverse structural failures, said photovoltaic panel support system, or at least one said photovoltaic cell panel support device (11), with the / each central trunk (1, 201) resting on the beams (124, 125) and / or attached to them.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Mechanical Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Roof Covering Using Slabs Or Stiff Sheets (AREA)
  • Photovoltaic Devices (AREA)
EP09793554A 2008-11-17 2009-11-17 Einrichtung zum tragen von fotovoltaiczellenpanels, trägersystem und installierte baugruppe Withdrawn EP2366196A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0806419A FR2938566B1 (fr) 2008-11-17 2008-11-17 Dispositif de support de panneaux de cellules photovoltaiques et systeme de support de panneaux photovoltaiques
PCT/FR2009/001322 WO2010055235A1 (fr) 2008-11-17 2009-11-17 Dispositif de support de panneaux de cellules photovoltaïques, système de support et ensemble installé

Publications (1)

Publication Number Publication Date
EP2366196A1 true EP2366196A1 (de) 2011-09-21

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP09793554A Withdrawn EP2366196A1 (de) 2008-11-17 2009-11-17 Einrichtung zum tragen von fotovoltaiczellenpanels, trägersystem und installierte baugruppe

Country Status (4)

Country Link
US (2) US8794583B2 (de)
EP (1) EP2366196A1 (de)
FR (1) FR2938566B1 (de)
WO (1) WO2010055235A1 (de)

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WO2010055235A1 (fr) 2010-05-20
US20130139468A1 (en) 2013-06-06
FR2938566A1 (fr) 2010-05-21
US8794583B2 (en) 2014-08-05
US20110215213A1 (en) 2011-09-08

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