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WO2025037293A1 - Dispositif modulaire de poursuite solaire à axe unique et système utilisant celui-ci - Google Patents

Dispositif modulaire de poursuite solaire à axe unique et système utilisant celui-ci Download PDF

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Publication number
WO2025037293A1
WO2025037293A1 PCT/IL2023/050842 IL2023050842W WO2025037293A1 WO 2025037293 A1 WO2025037293 A1 WO 2025037293A1 IL 2023050842 W IL2023050842 W IL 2023050842W WO 2025037293 A1 WO2025037293 A1 WO 2025037293A1
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WO
WIPO (PCT)
Prior art keywords
solar
single axis
tracking module
solar tracking
solar panels
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.)
Pending
Application number
PCT/IL2023/050842
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English (en)
Inventor
Roni Asayag
Yoel Cohen
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Asayag Energy Ltd
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Asayag Energy Ltd
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 Asayag Energy Ltd filed Critical Asayag Energy Ltd
Priority to PCT/IL2023/050842 priority Critical patent/WO2025037293A1/fr
Publication of WO2025037293A1 publication Critical patent/WO2025037293A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • H02S20/32—Supporting structures being movable or adjustable, e.g. for angle adjustment specially adapted for solar tracking
    • 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
    • H02S20/20—Supporting structures directly fixed to an immovable object
    • H02S20/22—Supporting structures directly fixed to an immovable object specially adapted for buildings
    • H02S20/23—Supporting structures directly fixed to an immovable object specially adapted for buildings specially adapted for roof structures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S30/00—Arrangements for moving or orienting solar heat collector modules
    • F24S2030/10—Special components
    • F24S2030/13—Transmissions
    • F24S2030/131—Transmissions in the form of articulated bars
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S30/00—Arrangements for moving or orienting solar heat collector modules
    • F24S2030/10—Special components
    • F24S2030/13—Transmissions
    • F24S2030/134—Transmissions in the form of gearings or rack-and-pinion transmissions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S30/00—Arrangements for moving or orienting solar heat collector modules
    • F24S2030/10—Special components
    • F24S2030/13—Transmissions
    • F24S2030/136—Transmissions for moving several solar collectors by common transmission elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S25/00—Arrangement of stationary mountings or supports for solar heat collector modules
    • F24S25/10—Arrangement of stationary mountings or supports for solar heat collector modules extending in directions away from a supporting surface
    • F24S25/12—Arrangement of stationary mountings or supports for solar heat collector modules extending in directions away from a supporting surface using posts in combination with upper profiles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S30/00—Arrangements for moving or orienting solar heat collector modules
    • F24S30/40—Arrangements for moving or orienting solar heat collector modules for rotary movement
    • F24S30/42—Arrangements for moving or orienting solar heat collector modules for rotary movement with only one rotation axis
    • F24S30/425—Horizontal axis
    • 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
    • Y02E10/40—Solar thermal energy, e.g. solar towers
    • Y02E10/47—Mountings or tracking
    • 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

Definitions

  • the present invention relates in general to systems for utilizing solar radiation, and particularly to solar systems implementing a single axis tracking technology.
  • the trackers are used to minimize the angle of incident between the incoming sun rays and photovoltaic panels. Reducing this angle increases the amount of energy produced from a given amount of installed power generating capacity.
  • Tracking systems are used because for such systems to operate, the collection efficiently of solar radiation is enhanced when the optical axis of the trackers is aligned with incident solar radiation, so that the solar photovoltaic collector is able to maintain its relative position throughout the day by remaining in a normal position relative to the incident solar radiation.
  • the use of a single axis tracking is implemented by having the collector oriented at azimuth north to south, and the tracking is affected in one direction - east to west across the day.
  • Such field of photovoltaic collectors are typically characterized by having a long chain of photovoltaic panels, extending from south to north that is mounted on a tracker frame which tracks the sun from east to west.
  • Such fields of photovoltaic panels typically make use of a single motor for the rotation of such a chain of photovoltaic panels in order to improve the system' s cost effectiveness.
  • the trackers implemented in these fields that are known in the art, are designed for a maximal load of panels per tracker, using heavy duty components and reinforced materials.
  • Such a design may further support another need, namely, having fields' configuration that is robustness to torque that might develop due to wind forces that act on the long chain of collectors.
  • using a wide massive beam as well as heavy duty components and reinforced materials is the prior art common solution to minimize the risks of exposure to failures due to developing torques and moments on the collectors' structure.
  • PV photovoltaic
  • US 20190199276 discloses combining several long single axis trackers by using one moving motor via a linear rod or a cable that link all the rotating axes of the trackers. This way, the rotation of many panels can be affected by a single motor.
  • the beam can have a rounded cross section (US 20210103302) or a square cross section (US 9806669) .
  • the present invention seeks to provide a solution that overcomes the above disadvantages of the prior art systems .
  • a single axis solar tracking module comprising: at least two solar panels rotatably coupled to a rotational axis, wherein the rotational axis comprises a rod extending laterally along the at least two solar panels, wherein a first part of the rod extends laterally along a first of the at least two solar panels, and comprises a protrusion that matches a cavity starting from an edge of the second part of that rod, and wherein the second part of the rod extends laterally along a second of the at least two solar panels that is located adjacent to the first solar panel, so that by inserting the protrusion into the cavity, the first and second solar panels are attached to each other thereby obtaining a combined rod, and wherein the combined rod is used as the solar panels' rotational axis; a frame, for mounting the at least two solar panels thereat ; a transmission system configured to rotate the frame of the single axis solar tracking module with the solar panels mounted thereat.
  • the single axis solar tracking module further comprises a motor configured to rotate the single axis solar tracking module by using the transmission system thereof .
  • At least one of the two solar panels is a bifacial photovoltaic panel.
  • the single axis solar tracking module further comprises a static beam structure.
  • the static beam structure is not located near the panels, and may be part of a structure that the single axis solar tracking module is being installed thereat .
  • the protrusion and the cavity have both a polygonal cross section.
  • the single axis solar tracking module is configured to be associated with a structure beam located away from the rotational axis, at a distance which is equal to at least half of the solar tracking module' s width.
  • the single axis solar tracking module is configured to be connected to another such a single axis solar tracking module, by using a flexible joint.
  • the frame of the single axis tracking module is configured to be attached to an object that has already been installed at a field where the single axis solar tracking module is about to be mounted .
  • the single axis tracking module further comprises a radiation measuring sensor.
  • the single mode tracking module is configured to operate also in a solar backtracking mode.
  • Solar backtracking mode refers to an operational mode that aims to minimize PV panel-on-panel shading, but yet be positioned as close as possible normal to the instantaneous sun orientation, (or in the present case, a row of the solar tracking modules on another row of the solar tracking modules) , thus avoiding production losses, since a solar tracker, or a linked solar tracker row, when used near another, shades the adjacent other solar tracker particularly during early morning and late afternoon.
  • the single axis tracking module is configured to operate in a way that the two solar (photovoltaic) panels can reach up to ⁇ 90° relative to a virtual horizontal plane.
  • the transmission system of the single axis solar tracking module is further configured to compensate for a distance extending between a center of the transmission system's final (last) gear wheel and between a center of mass of the at least two solar panels, by using a shift movement being proportional to an angle generated between the single axis solar tracking module and the ground, by the transmission system's final gear wheel rotation.
  • a shift movement being proportional to an angle generated between the single axis solar tracking module and the ground, by the transmission system's final gear wheel rotation.
  • Such proportional shift can be achieved by using a further, smaller grooved wheel which is positioned concentrically to the (outer) final gear wheel. This smaller grooved wheel may be attached to a linear (or nearly linear) grooved rod so that any rotational movement of the final gear wheel will cause a proportional linear shift.
  • the ratio between the last gear wheel and the additional smaller wheel, that is responsible for the linear shift transfer can be adjusted by doing a 90° degrees panel shift, so that the linear shift will move the center of mass of the at least two solar panels, exactly above the rotation axis, thereby eliminating the adverse impact of the torque generated due to the at least two solar panels weight .
  • a system comprising a plurality of single axis tracking modules of the present invention, wherein part of the plurality of single axis tracking modules are installed and operative above the operating remaining static or single axis tracking modules belonging to the plurality of single axis tracking modules.
  • a method for use in a solar system comprising a plurality of single axis tracking modules (i.e. , photovoltaic panels) , wherein the method comprises a step of utilizing a radiation measuring sensor installed remotely from one or more of the single axis tracking modules.
  • the method further comprises a step of utilizing a sensor installed underneath the one or more single axis tracking modules' plane in order to limit the angular tracking range of the one or more single axis tracking modules, to a minimal rotation.
  • the rotation of the one or more single axis tracking modules is limited to a near vertical angles, thereby limiting the shadowing of the one or more single axis tracking modules' panels at the middle of the day and allowing passing of sun rays.
  • FIG. 1 - illust rates the schematic view of a single axis solar tracking module construed according to an embodiment of the present invention
  • FIG. 2 - illust rates a schematic blown view of part of the single axis solar tracking module of FIG. 1;
  • FIG. 3 - demonstrates two single axis solar tracking modules that are connected to each other, where each of these two modules has a different orientation from the other;
  • FIG. 4 - presents an embodiment of the present invention for overcoming topography problems created when installing a plurality of single axis solar tracking modules on slanted roofs;
  • FIG. 5 - demonstrates an embodiment of the present invention by which the single axis solar tracking module can reach up to + /- 90° position relative to the ground;
  • FIG. 6 - exemplifies an embodiment of the invention for implementing solar backtracking mode
  • FIG. 7 - illust rates an embodiment of the present disclosure wherein a plurality of single axis solar tracking modules are installed in an agricultural field;
  • FIG. 8A and FIG. 8B - illust rate an embodiment for implementing the single axis solar tracking modules of the present invention, on sideroad fences.
  • FIG. 8A illustrates their tilt angle at about noon time
  • FIG. 8B illustrates their tilt angle during morning or evening times;
  • FIG. 9 - illust rates an embodiment for implementing the single axis solar tracking modules of the present invention on greenhouses
  • FIGs . 10A to IOC - demonstrate an embodiment of the present invention, implementing installation of the single axis solar tracking modules in a two levels' configuration, where the different FIGs. present their different inclination angles during the day;
  • FIG. 11 - illust rates an embodiment of the present invention, implementing a solution to compensate for a distance extending between a center of the transmission system's last gear wheel and a center of mass of the two solar panels; and FIG. 12 - demonstrates an embodiment of the present invention for adjusting the ratio between the last gear wheel and an additional smaller wheel by affecting a 90° degrees panel shift.
  • the term "comprising" is intended to have an open-ended meaning so that when a first element is stated as comprising a second element, the first element may also include one or more other elements that are not necessarily identified or described herein, or recited in the claims.
  • the present invention aims to provide a solar tracking device that can be installed in areas having varying topography, existing infrastructures, roofs, greenhouses and fences, in other words, constrains to which the systems known in the art, cannot provide a solution .
  • the single axis solar tracking modules of the present invention when installing the single axis solar tracking modules of the present invention, they will be positioned so that their rotational axis will coincide with the north-south direction, thereby enabling them to track the solar irradiation effectively by moving from east to west throughout the day.
  • FIG. 1 illustrates a schematic view of a single axis solar tracking module 15 construed according to an embodiment of the present invention.
  • single axis solar tracking module 15 comprises two solar panels that are held within a frame, which is mounted on a solid beam 16 (the latter is not a part of the single axis solar tracking module 15) .
  • Beam 16 is associated with a support pillar 17, so that the structure of beam 16 and pillar 17 supports the weight of tracking module 15 attached thereto.
  • a thin rod, shown in this FIG. as a thin rod that comprises two parts 12 and 13, has an axis connected to element 14 via a series of gears that are configured to rotate the frame of panel frame solar tracking module 15 and the two solar panels thereof.
  • element 14 is a half-circular large gear, attached directly to the support frame of the solar panels, as will be further elaborated.
  • the single axis solar tracking module typically comprises two solar panels (but obviously not restricted to two) as shown in this FIG. , however, when installing these solar modules as part of a solar field, a raw of solar tracking modules may be of any designed length by simply connecting the modular single axis solar tracking modules to each other in series, thereby achieving the required length.
  • Element 18 is a metal post that connects the beam to the rotation axis of single axis solar tracking module 15. The length of element 18 determines the space extending between beam 16 and the two solar panels.
  • element 18 is made a longer element, to suit this requirement. It should be noted that the solution provided by the present invention, by which there is a separation of the beam element from the rotating elements, provides an advantageous option to have an independent rotation-tracking mechanism that is a light weight mechanism, hence does not need to provide a support for a heavy weight.
  • FIG. 2 illustrates a blown schematic view of part of the single axis solar tracker of FIG. 1.
  • the part of the single axis solar tracking module 15 shown in FIG. 2 is the part which enables the single axis solar tracking module 15 to be connected to another such a single axis solar tracking module (i.e. , the modularity of the solar system is obtained by using any number of required single axis solar tracking modules) , namely, thin rod parts 12 and 13 and the transmission system.
  • the modularity discussed above is demonstrated between the two solar panels of the single axis solar tracking module 15. It should be said however, that modularity is in fact achieved when connecting two adjacent modules, and their connection is done as illustrated in this FIG. 2, mutates mutandis .
  • protrusion 11 is located at the end of part 12 of the thin rod.
  • Part 12 with its protrusion 11 has a polygonal cross section, e.g. , a hexagonal cross section, and is configured to be inserted into the other part of the rod, part 13, (or the rod of the neighboring single axis solar tracking module, as the case may be) .
  • Rod part 13 has also a hexagonal cross section, but unlike part 12, instead of having a protrusion such as element 11, there is a cavity within part 13, which matches the dimensions of protrusion 11, to enable forming a male-female connection, when inserting protrusion 11 into the cavity.
  • rod part 12 and its protrusion 11 rotate while following the solar irradiation, they force the connected part 13 to rotate with them.
  • connection between two adjacent single axis solar tracking modules is a detachable connection which is rather useful when carrying out repair or maintenance operations of the single axis solar tracking modules. This also allows a very easy way to customize the total length of a row of single axis solar tracking modules at any given time.
  • the ability to use any number of these solar modules is also beneficial for providing the ability to use different motors, depending the length of the combined rods' parts, the respective parts 11, 12, and 13 of the solar tracking modules used, as required when installing a row of such modules and especially in a solar field that has a non-uniform topography.
  • the photovoltaic panels are rotated by the combined rod, using in this example few gear wheels 111, 112, 113, 114 and a final gear wheel 14.
  • the latter gear wheel is attached to the support frame of the solar panels that belong to the single axis solar tracking module 15.
  • beam 16 supports single axis solar tracking module 15 and provides rigidity of the structure.
  • Beam 16 has a support pillar 17, which holds one or more single axis solar tracking modules at a required distance above the surface .
  • Pillars 17 may be supplied at the solar field site as part of the tracking system that comprises a plurality of single axis solar tracking modules.
  • objects that are already installed at the solar field site can be used for the single axis solar tracking modules to be attached (e.g. , a fence, etc. ) to them.
  • pillars 17 since they are not a part of the single axis solar tracking modules, there is no need to have a number of pillars 17 that match the number of the single axis solar tracking modules 15, as long as the structure rigidity provided by beam 16 is sufficient to support the single axis solar tracking modules 15 that are installed between two adjacent pillars 17.
  • One of the advantages provided by the solution of the present invention is that different parts are used to provide the rotation of the solar panels of the system while other parts are used to provide the support for the system.
  • support beam 16 may be eliminated altogether, or if it exists, it would preferably be located far away, at the lower part of the system, and is obviously not part of the rotation action.
  • support beam 16 may be eliminated altogether, or if it exists, it would preferably be located far away, at the lower part of the system, and is obviously not part of the rotation action.
  • final gear wheel 14 may be constructed in such a way that it would form a part of the solar panels support structure, but yet will be large enough to serve as a rotatable element that is mounted on the stationary support structure along a horizontal rotational axis. In other words, final gear wheel 14 may ensure the existence of a large enough distance between the beam and the rod elements. Therefore, the use of final gear wheel 14 as an integral part of the solar panels support structure enables the solar panels to be mounted directly on the transmission system without having to use any mediators therebetween. Consequently, the panels may be installed in a frameless mode.
  • final gear wheel 14 is mounted on the solar panels frame, it presents a meaningful advantage when the sites used for the installation of such a solar field is a roof, a green house, buildings, fences, walls and the like.
  • FIG. 3 demonstrates a case where element 11 can be used for connecting two single axis solar tracking modules, where each of these two modules has a different orientation than the other, yet the combination can easily be operated by using the same motor and rods configuration.
  • element 11 or elements 12 and 13 of FIG. 1, at very specific locations
  • the polygon shape of element 11 has a structure that enables the required functionality, and therefor in spite of small changes in the rods' orientation, the rotation remains as explained before along the non-linear rod shown in the FIG.
  • the solution provided by the present invention relies on using a long thin rod for operating a plurality of single axis solar tracking modules, serially connected to each other.
  • the need to invest forces in order to rotate the plurality of solar panels together is partially resolved by splitting long trackers' chains into shorter chains, still, the problem of handling large torques and moments that may result from the single axis solar tracking module own weight, wind and weather conditions, should be addressed.
  • Such torques are intensified once the single axis solar tracking module' panels are not horizontal and rotated, and these torques are at their peak when the single axis solar tracking module is at the start the backtracking.
  • the single axis solar tracking module is positioned normal (vertical) to the ground surface.
  • FIG. 5 illustrates a situation whereby the rotation of the final gear element 14 in the transmission system is temporarily positioned very close to the panels' center of mass.
  • the transmission system may further include an additional shift that can reduce the distance between the two axes.
  • a shift should be proportional to the angle of the final gear wheel' s rotation.
  • FIG. 4 presents a solution for overcoming topography problems created when using of slanted roofs. Because of the narrow profile of the rod used as the rotational axis and the fact that it is separated from the wide support structure, a number of solutions may be applied. For example, using a flexible shaft coupling and universal joint such as: “Pin and Block”, “Needle bearing”, “Ball and socket”, or Geared solutions.
  • a rod that may be used in accordance with the present invention is 10-35mm in diameter.
  • the solution provide by the present invention enables the use of a relatively thin rod for the rotation while having the support rigid and wide beam 16 located away from the solar panels. Having such a configuration, results in that there is no substantial shadowing adverse effect due to the beam, on the back radiation reflected from the ground, and a high performance is achieved while using solar panels and especially in the case that bifacial solar panels are used.
  • the distance between supporting beam 16 and the solar panels is big enough (for example at least module width) it is possible to achieve by using the present invention solution, a solar panel rotation up to about 90 degrees, because there is no obstruction to their movement by the beam.
  • a solar panel rotation up to about 90 degrees, because there is no obstruction to their movement by the beam.
  • the system described hereinabove is suitable to implement solar backtracking technique in order to avoid row to row shading, while allowing as little as possible deviation from the true tracking angle, thereby obtaining an improved performance of the solar field.
  • Such an improved performance is achieved by positioning the rows of the solar tracking modules in such a way that the shadow casted from the top edge of one row is exactly tangent to the bottom edge of the row behind it.
  • solar fields populating dense rows of solar tracking modules, there are many hours during the day that the shadow casted on the ground by the solar photovoltaic panels covers the whole area underneath these panels.
  • the backtracking mode of operation enables achieving a good energy yield while still using a dense panel coverage of the area available for the solar field.
  • FIG. 6 exemplifies the novel concept of implementation of a solar backtracking mode.
  • a very thin pole 22 which extends away from the single axis solar tracking module 15, is used, a pole which is configured to cast as little shadow as possible.
  • a radiation sensor 21 is attached to this pole 22.
  • the single axis solar tracking module may follow a somewhat different tracking scheme from a pure solar tracking scheme, so that solar rays may penetrate in between the panels even in cases where shadow starts to be casted on the radiation sensor 21.
  • a complete shadowing may be avoided and extra sun time may be used during which sun rays will pass between the solar tracking modules, thereby capturing additional solar radiation that would reach the bottom side of the bifacial panel, without extending the distance between the rows of the solar tracking modules.
  • the sensor applied to sense the radiation can be positioned on the ground or at any location that is not physically connected to the single axis solar tracking module.
  • Such a situation might significantly limit the angular tracking range to a very minimal rotation, and consequently might cause the panels to rotate near vertical angles (for example within a range of ⁇ 30 degrees around the direction normal to the ground) .
  • such an option is very attractive for implementation on vertical fences or agriculture fields, in which the shadowing cover ratios must be fixed or at least well controlled.
  • a method utilizing a remote sensor in a solar field that operates while relying on a backtracking technique, provides a solution for solar energy collection while using vertical PV panels, and for denser alternative for sparse periods in the cases of single axis solar tracking modules where dual land usage is needed.
  • FIG. 6 illustrates a further embodiment, wherein a wind sensor element 23 is implemented.
  • a wind sensor element 23 when the wind reaches a pre-defined threshold, a signal is generated by wind sensor 23 which in turn triggers an action to be taken which results in that the photovoltaic panels are brought to a horizontal position or to a perpendicular position, if the wind direction is such that when the photovoltaic panels are brought to a perpendicular position, they will be positioned in parallel to the wind direction.
  • Wind sensor 23 may be located at any one of many locations in the solar field of the photovoltaic panels' arrays and it is likely that only few or even one wind sensor will be required for the whole a solar field.
  • this solution requires spacing the rows of the solar tracking modules, apart. Obviously, when using prior art solutions, this requirement leads to the restriction on the number of solar tracking modules that can be installed per area unit of the field (i.e. , the density of installed photovoltaic panels) .
  • FIGs. 8A and 8B illustrate the implementation of the single axis solar tracking modules of the present invention, on sideroad fences.
  • FIG. 8A illustrates the solar tracking modules position at about noon time
  • FIG. 8B illustrates the solar tracking modules position during morning or evening times.
  • FIG. 9 demonstrates the use of the single axis solar tracking modules in accordance with an embodiment of the present invention implemented for greenhouses' applications .
  • FIGs. 10 illustrate another embodiment of the present invention, by which the single axis solar tracking modules of the present invention are installed in a two levels' configuration, so as to form a lower PV array and an upper PV array, where both these arrays have the same recurrence of the solar tracking modules.
  • FIG. 10A illustrates the morning case where the sun rays can pass in between the solar tracking modules of the upper array and irradiate the solar tracking modules of the lower array.
  • FIG. 10B illustrates the orientations of the upper array and the lower array at the middle of the day case
  • FIG. 10C illustrates orientations of the upper array and the lower array in between the two cases illustrated in FIGs 10A and 10B. As may be seen from these FIGs.
  • sun rays that passed between the single axis solar tracking modules of the upper level reached the single axis solar tracking modules of the lower level.
  • Such an embodiment is very useful particularly for areas where there is a need to upgrade already installed PV arrays.
  • the additional PV arrays can be installed as an upper-level array at a sufficient height above ground, while the already installed PV array can be used as the lower-level array where the effective PV panels will be those that are located underneath the spaces that will be left between the single axis solar tracking modules of the upper level.
  • the inclination angle of the single axis solar tracking modules of the lower-level array may be changed in conformity with the solar/shadow conditions that this array is subjected to.
  • Such changes may be implemented by using the transmission system that rotates the single axis solar tracking modules of the lower level (e.g. , element 14 in FIG. 2) , and in order to provide the control of the transmission system of the lower array with the information required to affect such changes, radiation sensors 21, which may be located as depicted in FIG. 10A at the edge of the panels, or independently of the panels (e.g. , ground installation) , or at any combination of the two installation options, are used.
  • FIG. 11 illustrates an embodiment, by which the transmission system of the single axis solar tracking module is further configured to compensate for a distance extending between a center of the transmission system's final (last) gear wheel 1101 and between a center of mass of the at least two solar panels 1103, by using a shift movement being proportional to an angle generated between the single axis solar tracking module and the ground, by the transmission system's final gear wheel rotation.
  • Such proportional shift can be achieved by using a further, smaller grooved wheel 1105 which is positioned concentrically to the (outer) final gear wheel.
  • This smaller grooved wheel may be attached to a linear (or nearly linear) grooved rod 1107 so that any rotational movement of the final gear wheel will cause a proportional linear shift.
  • the ratio between the last gear wheel and the additional smaller wheel, that is responsible for the linear shift transfer can be adjusted as depicted in FIG. 12 by affecting a 90° degrees panel shift, so that the linear shift will move the center of mass of the at least two solar panels, exactly above the rotation axis, thereby eliminating the adverse impact of the torque generated due to the at least two solar panels weight.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Photovoltaic Devices (AREA)

Abstract

L'invention concerne un module de poursuite solaire à axe unique qui comprend : deux panneaux solaires couplés de manière rotative à un axe de rotation, l'axe de rotation comprenant une tige s'étendant latéralement le long des au moins deux panneaux solaires, une première partie de cette tige s'étendant latéralement le long d'un premier panneau parmi les deux panneaux solaires, et comprenant une saillie qui concorde avec une cavité démarrant à partir d'un bord de la seconde partie de la tige, et la seconde partie de la tige s'étendant latéralement le long d'un second panneau parmi les deux panneaux solaires qui est situé de manière adjacente au premier panneau solaire, de telle sorte que, par l'insertion de la saillie dans la cavité, les premier et second panneaux solaires sont fixés l'un à l'autre et la tige combinée est utilisée comme leur axe de rotation ; un cadre, pour le montage des deux panneaux solaires sur celui-ci ; et un système de transmission configuré pour mettre en rotation le cadre du module de poursuite solaire à axe unique avec les deux panneaux solaires montés sur celui-ci.
PCT/IL2023/050842 2023-08-11 2023-08-11 Dispositif modulaire de poursuite solaire à axe unique et système utilisant celui-ci Pending WO2025037293A1 (fr)

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PCT/IL2023/050842 WO2025037293A1 (fr) 2023-08-11 2023-08-11 Dispositif modulaire de poursuite solaire à axe unique et système utilisant celui-ci

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20090113799A (ko) * 2008-04-28 2009-11-02 (주)대양테크 그림자 영향을 고려한 태양광 발전장치와 그 방법
US20160105141A1 (en) * 2013-07-03 2016-04-14 Industrial Origami, Inc. Solar panel rack
US20160365830A1 (en) * 2015-05-18 2016-12-15 Alion Energy, Inc. Systems and methods for rotating photovoltaic modules
US20180091088A1 (en) * 2016-07-08 2018-03-29 Alion Energy, Inc. Systems and methods for rotatably mounting and locking solar panels
US20200052644A1 (en) * 2017-03-07 2020-02-13 Nevados Engineering, Inc. Variable terrain solar tracker
WO2020153533A1 (fr) * 2019-01-23 2020-07-30 Kepco Engineering & Construction Company, Inc. Système photovoltaïque multi-couches (multi-empilement) avec réflecteur
WO2020224690A1 (fr) * 2019-05-09 2020-11-12 Spork & Partners Engineering Consulting Dispositif de poursuite

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20090113799A (ko) * 2008-04-28 2009-11-02 (주)대양테크 그림자 영향을 고려한 태양광 발전장치와 그 방법
US20160105141A1 (en) * 2013-07-03 2016-04-14 Industrial Origami, Inc. Solar panel rack
US20160365830A1 (en) * 2015-05-18 2016-12-15 Alion Energy, Inc. Systems and methods for rotating photovoltaic modules
US20180091088A1 (en) * 2016-07-08 2018-03-29 Alion Energy, Inc. Systems and methods for rotatably mounting and locking solar panels
US20200052644A1 (en) * 2017-03-07 2020-02-13 Nevados Engineering, Inc. Variable terrain solar tracker
WO2020153533A1 (fr) * 2019-01-23 2020-07-30 Kepco Engineering & Construction Company, Inc. Système photovoltaïque multi-couches (multi-empilement) avec réflecteur
WO2020224690A1 (fr) * 2019-05-09 2020-11-12 Spork & Partners Engineering Consulting Dispositif de poursuite

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