JP2009266890A - Tracking condenser-type solar battery device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inexpensive tracking condenser-type solar battery device with high tracking accuracy. <P>SOLUTION: The tracking condenser-type solar battery device 1 includes a sub module 2 for photovoltaic power generation, a module housing 3 provided to have the sub module 2 independently driven, and a track-driving system for track-driving the sub module 2 and the module housing 3. The track-driving system includes a first track-driving system 4 for driving the module housing 3 to track the sun with rough accuracy and a second track-driving system 5 for driving the sub module 2 to track more accurately than the first track-driving system. Thus, structures of the first and second systems 4 and 5 are simplified, thereby generally reducing a cost of the track-driving system. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a tracking concentrating solar cell device that is low in cost and has high tracking accuracy.

  FIG. 6 is a schematic perspective view of a conventional tracking concentrating solar cell device. FIG. 7 is a schematic cross-sectional view of another conventional tracking and concentrating solar cell device.

  In recent years, solar cell power generation has attracted attention from the viewpoint of utilization of natural energy. However, solar cell power generation has a problem that the facility cost is relatively high with respect to the amount of power generation. Therefore, as a solar cell device that improves power generation efficiency while suppressing the facility cost of the solar cell device, it has a structure for concentrating sunlight on the solar cell element by a condensing lens, and a mechanism for tracking the sun. A tracking concentrating solar cell device 101 has been proposed (see Patent Document 1).

  Specifically, the tracking concentrating solar cell device 101 includes a submodule 102 including a condensing lens and a solar cell element, a module housing 103 in which a plurality of submodules 102 are arranged, and the module housing 103 as the sun. It comprises a tracking mechanism (not shown) for tracking. According to such a configuration, since sunlight is collected by the condensing lens and used as energy, a relatively expensive solar cell element can be reduced in size. In addition, since the component is configured using a relatively inexpensive condensing lens, the cost of the component can be reduced as a whole. In addition, since sunlight is condensed by a lens and used, the power generation efficiency of the solar cell element itself can be improved as compared with the case of non-condensing.

  However, this type of concentrating solar cell device 101 of this type has a structure in which a large number of submodules 102 are arranged in a module housing 103 and these submodules 102 are driven simultaneously in order to improve power generation efficiency. For this reason, the module housing 103 is increased in size and weight, and the drive energy for tracking the sun increases.

  There were also the following problems. In other words, the tracking concentrating solar cell device 101 has a structure for concentrating sunlight on a solar cell element using a condensing lens, but the direction of sunlight and the optical axis of the condensing lens are If it deviates, a focus will remove | deviate from a solar cell element, and electric power generation efficiency will fall. In order to prevent such a decrease in power generation efficiency, the deviation between the direction of the sun and the direction of the module housing 103 (the direction in which the optical axis and the light receiving surface of the condenser lens face) is in a very small range (for example, ± 0.5 °). The drive system of the tracking concentrating solar cell device 101 is configured so as to track the sun over a wide range from sunrise to sunset while controlling so as to subside. In the large module housing 103, the center of gravity changes due to the drive, and the displacement due to weight occurs. Therefore, in order to achieve high accuracy and wide range driving, the module housing 103 is supported without displacement. It was necessary to provide a support mechanism, a feedback control mechanism for correcting the positional deviation, and the like. This complicates the drive system and increases the equipment cost.

Therefore, a tracking concentrating solar cell device 111 as shown in FIG. 7 has been proposed as one that enables high-accuracy and wide-range tracking of the sun at low cost (see Patent Document 2). This tracking concentrating solar cell device 111 has a structure in which the module housing 113 which is a heavy object is not driven for tracking, but the individual submodules 112 are driven for tracking. Thereby, complication of the tracking drive system of the tracking concentrating solar cell device 111 could be avoided.
JP 2001-148501 A Japanese Patent Laid-Open No. 10-173214

  However, the tracking concentrating solar cell device 111 having such a structure has a structure in which each submodule 112 is rotated with the movement of the sun. Depending on the rotation angle, the condensing lens 121 of the submodule 112 is used. May be hidden behind adjacent submodules 112, it is necessary to increase the distance between the submodules 112 and 112. For this reason, the ratio of the power generation portion (submodule filling rate) to the module housing 113 is low, and there is a problem that power generation efficiency per unit area is reduced. Therefore, in order to secure the power generation amount equivalent to the conventional one, it is necessary to introduce a new tracking concentrating solar cell device 111 to compensate for the decrease in power generation efficiency. As a result, per unit power generation amount From the viewpoint of the equipment cost, the reduction of the equipment cost was small.

  The present invention has been made in view of such circumstances, and an object thereof is to provide a tracking concentrating solar cell device that is low in cost and has high tracking accuracy.

  In the tracking concentrating solar cell device according to the present invention, a sub-module having a condensing body for concentrating sunlight and a solar cell element arranged near the focal point of the condensing body is independent of the module housing. It is arranged in the module housing to be driven, and the submodule and the module housing are driven by a tracking drive system so that the light receiving surface of the submodule faces the sun, The tracking drive system includes a first tracking drive system that drives the module housing to track the sun with coarse accuracy, and a second tracking drive that drives the submodule with higher accuracy than the first tracking drive system. System.

  According to the present invention, the module housing is driven by the first tracking drive system so as to track the sun with coarse accuracy, and the second tracking drive system can be driven independently from the module housing. Since the module is driven so as to track the sun with higher accuracy than the first tracking drive system, the sun can be tracked with high accuracy.

  Further, in the past, the control mechanism has been complicated because the module housing, which is a heavy object, is configured to track the sun with high accuracy. However, according to the present invention, the first tracking drive system has a coarse accuracy. Therefore, the control mechanism of the first tracking drive system can be simplified.

  In addition, the second tracking drive system is supposed to drive the submodule with higher accuracy than the first tracking drive system, but the submodule is relatively low weight and small in size, so there is almost no drive control error. Since this does not occur, there is an effect that the second tracking drive system need not be configured by a complicated control mechanism.

  That is, the tracking concentrating solar cell device according to the present invention has two drive systems, the first tracking drive system and the second tracking drive system, but without degrading the accuracy of the sun tracking drive, Since the structure of this drive system can be simplified, the tracking drive system can be simplified and reduced in cost as a whole. That is, the tracking concentrating solar cell device can have low cost and high tracking accuracy.

  In the tracking concentrating solar cell device, the first tracking drive system is configured to drive the module housing based on preset sun trajectory information, and the second tracking drive system is the The sub module may be driven so that the output of the sub module is maximized.

  According to this configuration, the module housing is driven by the first tracking drive system based on preset sun trajectory information, and the output of the submodule is maximized by the second tracking drive system. Thus, the sub module is driven by the second tracking drive system so that the output of the sub module is maximized even when the orientation of the module housing is deviated from the direction of the sun. Therefore, the power generation efficiency of the tracking concentrating solar cell device can be improved.

  In the tracking concentrating solar cell device, the first tracking drive system is configured to drive the module housing based on preset sun trajectory information, and the second tracking drive system is the The submodule may be driven so that the output of the light amount sensor incorporated in the second tracking drive system is maximized.

  According to this configuration, the module housing is driven by the first tracking drive system on the basis of preset sun trajectory information, and the output of the solar sensor is maximized by the second tracking drive system. Thus, the sub-module is driven by the second tracking drive system so that the output of the light quantity sensor is maximized even when the orientation of the module housing is deviated from the direction of the sun. Since it is driven, the power generation efficiency of the tracking concentrating solar cell device can be improved.

  According to the present invention, the tracking concentrating solar cell device has a tracking drive system including a first tracking drive system with coarse accuracy and a second tracking drive system with higher accuracy than the first tracking drive system. Therefore, the tracking drive system can be simplified and reduced in cost without degrading the accuracy of the sun tracking drive. That is, the tracking concentrating solar cell device can have low cost and high tracking accuracy.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows a schematic side view of a tracking concentrating solar cell device according to an embodiment of the present invention, FIG. 2 shows a schematic cross-sectional view of a submodule, and FIG. 3 shows a second driving a submodule. The schematic diagram of a tracking drive system is shown.

  The tracking concentrating solar cell device 1 is installed on a gantry 10. Specifically, a reinforced concrete foundation 11 is built on the ground 90, and the gantry 10 is firmly fixed thereon. The tracking concentrating solar cell device 1 is installed on the gantry 10. In other words, the tracking concentrating solar cell device 1 changes its center of gravity due to the tracking of the sun, so that if the installation is unstable, the installation position may be displaced. By installing the tracking concentrating solar cell device 1 at 10, the position and orientation of the tracking concentrating solar cell device 1 can be prevented from being shifted. Thereby, highly accurate tracking of the sun is possible.

  The tracking concentrating solar cell device 1 drives a sub-module 2 that receives sunlight to generate power, a module housing 3 in which one or more sub-modules 2 are arranged, a sub-module 2 and the module housing 3. And a tracking drive system. The tracking drive system includes a first tracking drive system 4 that tracks and drives the module housing 3 and a second tracking drive system 5 that tracks and drives the submodule 2.

  The submodule 2 generates power by sunlight, and holds the condensing lens 21, the solar cell element 22, the circuit board 23, the heat sink 24, and these components as shown in FIG. It consists of a unit frame 25.

  The condensing lens 21 is designed so that the focal point hits the solar cell element 22. The condensing lens 21 may be a convex lens or a fullnel lens.

  The solar cell element 22 generates power upon receiving sunlight, and is formed of single crystal silicon, polycrystalline silicon, a compound semiconductor, or the like.

  The circuit board 23 is formed of, for example, a ceramic substrate. On the surface thereof, lands on which the solar cell elements 22 are mounted, terminals connected to the electrodes of the solar cell elements 22, wirings connected to the terminals, and the like are formed. . And electric power is taken out from the solar cell element 22 through this terminal and wiring.

  The heat sink 24 is bonded to the back surface of the circuit board 23 so as to efficiently dissipate the heat of the solar cell element 22. Since the solar cell element 22 has a characteristic that the power generation efficiency is reduced by heating, the power generation efficiency is reduced by heating with the concentrated sunlight, but the heat sink 24 efficiently dissipates heat. A decrease in power generation efficiency is prevented. According to such a configuration, the solar cell element 22 is prevented from overheating caused by increasing the light energy density per unit area by concentrating sunlight on the solar cell element 22, and can efficiently generate power. Can do.

  The module housing 3 holds the submodule 2. Specifically, the submodule 2 is mounted on the module housing 3 so that the main surface 31 of the module housing 3 and the light receiving surface (condensing lens surface) of the submodule 2 are substantially parallel. Further, the submodule 2 is disposed so as to be driven independently from the module housing 3 by the second tracking drive system 5. On the other hand, the module housing 3 is driven by the first tracking drive system 4.

  The first tracking drive system 4 supports the module housing 3 and supports the module housing 3 so that the main surface 31 (surface on which the submodule 2 is mounted) 31 of the module housing 3 always faces the sun. It is configured to be driven according to the sun's trajectory.

  Specifically, the first tracking drive system 4 includes a stage 41 that supports the module housing 3 so that the module housing 3 can be driven, and a power cylinder 42 that changes the elevation angle of the module housing 3 while tilting and supporting the module housing 3. The tracking control device (not shown) for tracking the main surface 31 of the module housing 3 so as to face the sun.

  The stage 41 is rotatably disposed on the gantry 10. Specifically, the gantry 10 is provided with a support column 9 as a rotating shaft, and the support column 9 is provided with a stage 41 so as to be rotatable and the upper surface thereof is horizontal. Further, the stage 41 is configured to be rotated by a rotary drive device (not shown) such as a motor or a worm reducer. It is not necessary to use a motor or worm reducer that is driven with high accuracy. For example, a device that rotationally drives the stage 41 with an accuracy of ± 5 ° with respect to a set rotation angle when the stage 41 is rotated is used.

  The module housing 3 is mounted on the stage 41. The module housing 3 is provided with a pivot 35 along its lower side, and is rotatable around the pivot 35. Further, a power cylinder 42 is disposed between the upper back surface of the module housing 3 and the stage surface, and the elevation angle of the module housing 3 is changed by the expansion and contraction of the power cylinder 42. The power cylinder 42 may be hydraulic or electric. The power cylinder 42 is not required to be highly accurate as is the case with the motor and the worm reducer.

  Note that the structure for changing the elevation angle of the module housing 3 is not limited to the structure by pivoting around the pivot 35. For example, the mechanism for changing the elevation angle of the module housing 3 may be configured by a parallel link mechanism.

  The tracking control device controls the rotary drive device and the power cylinder 42 so that the main surface 31 of the module housing 3 (that is, the light receiving surface of the submodule 2) is directed toward the sun, and the module over the entire solar trajectory. The casing 3 is tracked by the sun.

  Specifically, the tracking control device obtains the sun trajectory information registered in advance, the latitude and longitude of the installation location of the tracking concentrating solar cell device 1, and the time for obtaining the sun direction (year, month, day, time) Based on the above, the direction of the sun from the installation location is calculated. Then, the elevation angle and azimuth angle of the module housing 3 in which the direction of the main surface 31 of the module housing 3 matches the direction of the sun are obtained, and the rotary drive device and the power cylinder 42 are driven so as to realize the elevation angle and azimuth angle. Let The allowable range at this time (the allowable range of deviation between the direction of the main surface 31 of the module housing 3 (direction perpendicular to the main surface) and the direction of the sun) is, for example, ± 5 ° as the angle control error (first Error range).

  With such a rough accuracy, the first tracking drive system 4 that can drive the module housing 3 within the permissible range without using a high-accuracy rotary drive device or a high-accuracy power cylinder 42 is configured. Thus, the first tracking drive system 4 can be configured at low cost.

  The first tracking drive system 4 is not limited to the above configuration. For example, the first tracking drive system 4 may be composed of two rotating shafts that are orthogonal to each other and rotate independently.

  The second tracking drive system 5 drives the submodule 2 so as to be tracked by the sun independently of the module housing 3. The second tracking drive system 5 is configured to drive the sub module 2 with higher accuracy than the first tracking drive system 4. For example, when the angle control error of the module housing 3 by the first tracking drive system 4 is ± 5 ° (first error range), the angle control error of the submodule 2 by the second tracking drive system 5 is the first The value is smaller than the error range ± 5 ° (second error range). More preferably, in order not to significantly reduce the power generation efficiency, the angle control error of the submodule 2 is set to ± 0.5 ° or less.

  Further, the driving range of the submodule 2 driven by the second tracking drive system 5 (the rotation angle of the submodule 2) is the same as or more than the first error range of the first tracking drive system 4. The For example, when the angle control error of the module housing 3 by the first tracking drive system 4 is ± 5 °, the drive range (angle control range) of the submodule 2 by the second tracking drive system 5 is ± 5 ° or more. It is said. With such a configuration, the direction deviation of the module housing 3 due to the control error of the first tracking drive system 4 (the deviation between the direction of the main surface 31 (direction perpendicular to the main surface) of the module housing 3 and the direction of the sun). Even if this occurs, the second tracking drive system 5 corrects the direction deviation.

  Specifically, as shown in FIG. 3, the second tracking drive system 5 includes a first link mechanism 51 that adjusts the angle of the solar cell element 22 and a second link mechanism 52 that adjusts the position of the condenser lens 21. It consists of and.

  The first link mechanism 51 is a two-axis link mechanism in which two axes rotate independently. Specifically, the first link mechanism 51 includes a first frame 51a that pivotally supports the solar cell element 22 with a first rotation axis, and a first rotation axis that is orthogonal to the first rotation axis. The second frame 51b supports the second frame 51b. The rotation drive mechanism for each axis of the biaxial link mechanism is driven by, for example, a stepping motor, servo motor, linear motor, or electromagnet, with an accuracy of ± 0.5 ° and a drive range (angle control range) of ± 5 °. It is configured so that the angle can be adjusted.

  Then, by the first link mechanism 51, time (year / month / day, time) for obtaining the sun trajectory information registered in advance, the latitude and longitude of the installation location of the tracking concentrating solar cell device 1 and the direction of the sun. Based on this, the angle of the solar cell element 22 is adjusted so that the direction in which the light receiving surface of the solar cell element 22 faces and the direction of the sun coincide.

  The angle adjustment of the solar cell element 22 by the first link mechanism 51 is not performed based on the sun trajectory information or the like as described above, but the solar cell element 22 of the solar cell element 22 is maximized so that the output of the solar cell element 22 is maximized. Angle adjustment may be performed. Specifically, the solar cell element 22 is rotated at predetermined intervals to detect the angle at which the output becomes maximum, and the solar cell element 22 is fixed at the detected angle.

  Further, the angle adjustment of the solar cell element 22 by the first link mechanism 51 is performed such that the output of a light amount sensor (not shown) incorporated in the second tracking drive system is maximized. May be. In such a case, the light quantity sensor is rotated every predetermined time to detect the angle at which the output becomes maximum, and the solar cell element 22 is fixed at the detected angle.

  The second link mechanism 52 is configured by a mechanism that is slidable in two directions independently of each other. Specifically, the second link mechanism 52 includes a first frame 52a that slidably supports the condenser lens 21 with a first guide, and a second guide that is orthogonal to the first guide. The second frame 52b is movably supported. The driving of each of the first and second frames 52a and 52b in each direction is performed by, for example, a stepping motor, a servo motor, or a linear motor. The second link mechanism 52 collects with the axis of the light receiving surface of the solar cell element 22 (the axis in the direction perpendicular to the light receiving surface) generated when the angle of the solar cell element 22 is adjusted by the first link mechanism 51. The condensing lens 21 is configured to move so as to correct the axial deviation of the optical lens 21 from the optical axis.

  That is, when the angle of the solar cell element 22 is adjusted by the first link mechanism 51, a deviation between the axis of the light receiving surface of the solar cell element 22 and the optical axis of the condenser lens 21 occurs, and the focal point of the condenser lens 21 is increased. Is removed from the solar cell element 22, so that the position of the condensing lens 21 is adjusted by the second link mechanism 52 so that there is no deviation between the axis of the light receiving surface of the solar cell element 22 and the optical axis of the condensing lens 21. It is corrected.

  Specifically, the control distance range of the condenser lens 21 by the second link mechanism 52 is such that the diameter of the condenser lens 21 is 100 mm and the distance between the condenser lens 21 and the solar cell element 22 is the dimension of the submodule 2. When it is 120 mm and its driving range (angle control range) is ± 5 °, it is ± 11 mm vertically and horizontally (see FIG. 4).

  By the way, since the solar cell element 22 and the condensing lens 21 are light weight compared with the module housing | casing 3, the 2nd tracking drive system 5 makes the structure simple and lightweight, and also the solar cell element 22 Can be configured to be driven with high accuracy and high speed. Therefore, although the second tracking drive system 5 is provided for the submodule 2, the weight of the second tracking drive system 5 mounted on the module housing 3 is not excessive. The control accuracy of the first tracking drive system 4 is not lowered. Further, even if the second tracking drive system 5 is a mechanism having a relatively heavy weight, the first tracking drive system 4 is not originally controlled with high accuracy, so that the overall weight of what is mounted on the first tracking drive system 4 is As long as the allowable amount is not exceeded, the tracking accuracy of the tracking concentrating solar cell device 1 is not lowered.

  In addition, the 2nd tracking drive system 5 is not limited to what drives the solar cell element 22 and the condensing lens 21 independently as mentioned above. For example, you may comprise so that the submodule 2 may be driven as one by one link mechanism.

  Further, the structure of the second tracking drive system 5 is not limited to the structure of the first link mechanism 51 or the second link mechanism 52 described above. For example, the second tracking drive system 5 may be configured by a combination of a link mechanism using a wire frame or the like, and a rotation mechanism using a gear or a belt.

  Next, the filling rate of the submodule 2 with respect to the module housing 3 will be described.

  4A and 4B are diagrams for explaining the filling rate of the submodule with respect to the module housing. FIG. 4A is a schematic diagram when the inclination angle of the submodule is 5 °, and FIG. It is a schematic diagram when an inclination angle is 24 degrees, (c) is a schematic diagram when the inclination angle of a submodule is 60 degrees.

  FIG. 5 is a table showing the filling rate of the submodule with respect to the module housing. FIG. 5A shows the case where the angle control range of the submodule is ± 5 ° in the east-west direction and ± 5 ° in the north-south direction. FIG. 5B shows the filling rate when the angle control range of the submodule is ± 60 ° in the east-west direction and ± 24 ° in the north-south direction. FIG. 5 also shows the filling rate depending on the number of submodules 2 mounted in the module housing 3.

  The filling rate of the submodule 2 with respect to the module housing 3 is indicated by the ratio of the area occupied by the condenser lens 21 of the submodule 2 to the main surface area of the module housing 3. The size of the module housing 3 is determined so that the submodule 2 does not enter the shade of the adjacent solar battery unit when the submodule 2 is inclined at the maximum angle (see FIG. 4).

  Hereinafter, an example of the filling rate of the submodule 2 with respect to the module housing 3 will be described.

  The submodule 2 (see FIG. 2) having a diameter of the condenser lens 21 of 100 mm and a distance between the condenser lens 21 and the solar cell element 22 of 120 mm can be rotated ± 5 ° in both the east-west direction and the north-south direction. The filling rate when closely mounted on the module housing 3 is as follows.

  In the case of the above conditions, as shown in FIG. 4 (a), the distance between the sub-modules 2 and 2 that can be driven so as not to be in the shadow of each other (the distance between the sub-modules 2 and 2) is about 101 mm. The distance between a certain submodule 2 and the module housing end 3a is calculated to be about 11 mm. When 20 submodules 2 are arranged in the east-west direction and the north-south direction, the size of the module housing 3 is about 2050 mm × 2050 mm, and the module filling rate at this time is about 96% (FIG. 5A). reference).

  Here, as an object for comparison, an example in which the filling rate of the submodule 2 is calculated with respect to the module housing 3 in a conventional tracking concentrating solar cell device having a structure in which only the submodule 2 tracks the sun is shown.

  For example, the sub-module 2 (see FIG. 2) whose diameter of the condenser lens 21 is 100 mm and the distance between the condenser lens 21 and the solar cell element 22 is 120 mm is rotated ± 60 ° in the east-west direction and ± 24 ° in the north-south direction. The filling rate when densely mounted on the module housing 3 in a possible state is as follows.

  In the case of this condition, in the north-south direction, as shown in FIG. 4 (b), the distance between the submodules 2 and 2 that can be driven so as not to be in the shade (interval between the submodules 2 and 2) is about The distance between the sub-module 2 at the end of 110 mm and the module housing end 3a is calculated to be about 45 mm. In the east-west direction, as shown in FIG. 4 (c), the distance between the submodules 2 and 2 that can be driven so as not to be in the shadow of each other (the distance between the submodules 2 and 2) is about 200 mm, which is the extreme end. The distance between the submodule 2 and the module housing end 3a is calculated to be about 79 mm. When 20 submodules 2 are arranged in the east-west direction and the north-south direction, the size of the module housing 3 is about 4060 mm × 2280 mm, and the module filling rate at this time is about 43% (FIG. 5B). reference).

  That is, in the tracking concentrating solar cell device 1 according to the present invention, the tracking drive system is configured by two drive systems of the first tracking drive system 4 and the second tracking drive system 5, and the first tracking drive system 4 Therefore, the angle control range of the second tracking drive system 5 can be reduced. Therefore, as apparent from the comparison between FIGS. 5A and 5B, according to the configuration of the tracking concentrating solar cell device 1, the filling rate of the submodule 2 with respect to the module housing 3 can be improved. Therefore, compared with the conventional tracking concentrating solar cell device, the power generation efficiency per unit area can be improved. Therefore, when securing the power generation amount equivalent to the power generation amount by the conventional tracking concentrating solar cell device, the number of the tracking concentrating solar cell devices 1 can be reduced, thereby reducing the equipment cost. Can do.

  As described above, according to the present invention, the module housing 3 is driven by the first tracking drive system 4 so as to track the sun with coarse accuracy, and independent from the module housing 3 by the second tracking drive system 5. The sub-module 2 that can be driven in this manner is driven so as to track the sun with higher accuracy than the first tracking drive system 4, so that the sun can be tracked with high accuracy.

  Further, in the past, the control mechanism was complicated because the module housing 3 which is a heavy object was tracked with high accuracy by the sun, but according to the present invention, the first tracking drive system 4 is Since the module housing 3 is configured to be driven for tracking with coarse accuracy, the control mechanism of the first tracking drive system 4 can be simplified.

  In addition, the second tracking drive system 5 is configured to drive the submodule 2 with higher accuracy than the first tracking drive system 4, but the submodule 2 is relatively low in weight and small in size so as to control driving. Therefore, there is an effect that the second tracking drive system 5 need not be configured by a complicated control mechanism.

  That is, the tracking concentrating solar cell device 1 according to the present invention has two drive systems, the first tracking drive system 4 and the second tracking drive system 5, but does not reduce the accuracy of the sun tracking drive. Thus, since the structure can be simplified for any drive system, the tracking drive system can be simplified and reduced in cost as a whole. That is, the tracking concentrating solar cell device 1 can have low cost and high tracking accuracy.

  In the tracking concentrating solar cell device 1 described above, the first tracking drive system 4 drives the module housing 3 based on preset sun trajectory information, and the second tracking drive system 5 Since the sub-module 2 is driven so that the output of the sub-module 2 is maximized, the module housing 3 is tracked by the first tracking drive system 4 based on preset sun trajectory information. When the sub-module 2 is driven by the second tracking drive system 5 so that the output of the sub-module 2 is maximized, the direction of the module housing 3 is deviated from the direction of the sun. Even so, since the sub-module 2 is driven by the second tracking drive system 5 so that the output of the sub-module 2 is maximized, the power generation efficiency of the tracking concentrating solar cell device 1 is improved. Door can be.

  In the tracking concentrating solar cell device 1 described above, the first tracking drive system 4 drives the module housing 3 based on preset sun trajectory information, and the second tracking drive. Since the system 5 drives the submodule 2 so that the output of the light quantity sensor incorporated in the second tracking drive system 5 is maximized, the system 5 is preset by the first tracking drive system 4. Based on the sun trajectory information, the module housing 3 is driven to follow, and the sub-module 2 is driven by the second tracking drive system 5 so that the output of the solar sensor is maximized. Even if the orientation of the module housing 3 is deviated from the direction of the sun, the sub-module 2 is driven by the second tracking drive system 5 so that the output of the light quantity sensor is maximized. Thereby improving the power generation efficiency of the pond system 1.

It is a schematic side view of the tracking concentrating solar cell device according to the embodiment of the present invention. It is a schematic sectional drawing of a submodule. It is a schematic diagram of the 2nd tracking drive system which drives a submodule. It is explanatory drawing for demonstrating the filling rate of the submodule with respect to a module housing | casing. It is the table | surface which showed the filling rate of the submodule with respect to a module housing | casing. It is a schematic perspective view of the conventional tracking concentrating solar cell device. It is a schematic sectional drawing of the tracking condensing type solar cell apparatus of the other conventional form.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Tracking condensing type solar cell apparatus 2 Submodule 3 Module housing 4 1st tracking drive system 5 2nd tracking drive system 21 Condensing lens 22 Solar cell element 23 Circuit board 24 Heat sink 25 Unit frame 51 1st link mechanism 52 1st 2 link mechanism 90 Ground

Claims (3)

A sub-module having a light collector for concentrating sunlight and a solar cell element arranged near the focal point of the light collector is disposed in the module housing so as to be driven independently from the module housing, In the tracking concentrator solar cell device that drives the submodule and the module housing by a tracking drive system so that the light receiving surface of the submodule faces the sun,
The tracking drive system includes a first tracking drive system that drives the module housing so as to track the sun with coarse accuracy, and a second tracking that drives the submodule with higher accuracy than the first tracking drive system. A tracking concentrating solar cell device comprising a drive system. The tracking concentrating solar cell device according to claim 1,
The first tracking drive system is configured to drive the module housing based on preset sun trajectory information, and the second tracking drive system is configured so that the output of the sub module is maximized. A tracking concentrating solar cell device characterized in that it is driven. The tracking concentrating solar cell device according to claim 1,
The first tracking drive system is configured to drive the module housing based on preset sun trajectory information, and the second tracking drive system is an output of a light amount sensor incorporated in the second tracking drive system. The tracking concentrating solar cell device is characterized in that the submodule is driven so that the maximum is.

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