JP5864293B2 - Concentrating solar power generation system - Google Patents

Description

  The present invention relates to a concentrating solar power generation system capable of collecting sunlight and improving efficiency in power generation using sunlight.

  In recent years, photovoltaic power generation has been reviewed as clean energy that does not pollute the environment. Such solar power generation is generally performed by generating power by attaching a solar cell panel in which solar cells are arrayed on a roof or the ground.

  Conventionally, in order to improve efficiency, various proposals have been made to adjust the angles of solar cells and reflectors that receive sunlight.

  For example, in Patent Document 1, a solar cell panel, a timepiece that receives a standard radio signal including time information and date information, measures the time, sets the date, and a drive that rotates the solar cell panel in an elevation angle direction. And a control means for controlling the drive means. The control means changes the angle of the solar cell panel by the drive means based on the time information, whereby the solar battery panel is changed in season and time. Instead of this, it is proposed to control the sun so that it can be tracked.

  In Patent Document 2, a solar cell array is arranged on a tracking frame of a solar tracking device in order to obtain a high light collecting ability even in bad weather conditions such as light cloudy weather or cloudy weather. A concave mirror is arranged in the vicinity of the concave mirror, a reflecting mirror is arranged in the vicinity of the focal position of the concave mirror, and the solar cell array is irradiated with reflected light from the concave mirror by the reflecting mirror.

  Patent Document 3 includes a turntable that rotates following the movement of the sun, a concave mirror that is supported by the turntable, and a solar cell that is disposed to face the concave mirror. It proposes to collect sunlight into solar cells.

JP 2002-202817 A JP 2000-227573 A Japanese Patent Laid-Open No. 2000-243983

  In such a conventional light collecting system, the concave mirror is movable following the movement of the sun, but its shape or structure is fixed.

  Therefore, there is a problem that it is not necessarily optimized for the seasonal change and the geographical position where the solar cell is attached.

  The present invention has been made in view of such conventional problems, and an object of the present invention is to provide a concentrating solar power generation system that can be optimized for seasonal changes and geographical positions.

In order to achieve the above object , one embodiment of the present invention provides:
A solar panel,
A reflective panel for irradiating the solar panel with reflected light;
Control means for controlling the reflective panel according to date and time data corresponding to the current date and time,
A concentrating solar power generation system comprising:
The area of the reflection surface of the reflection panel is variable, and the control means controls the reflection panel so as to change the area of the reflection surface according to date and time data.

Another embodiment of the present invention,
Before SL reflective panel, a plurality of reflective surface elements, a plurality of reflective surface elements, characterized in that the is relatively movable.

One embodiment of the present invention includes
A solar panel,
A reflective panel for irradiating the solar panel with reflected light;
In relation to date and time data corresponding to the current date and time, a concentrating solar power generation system comprising a control means for controlling the reflective panel,
The reflectance of the reflective surface of the reflective panel is variable, and the control means controls the reflective panel so as to change the reflectance of the reflective surface according to date and time data.

  According to the present invention, since the area or reflectance of the reflection surface of the reflection panel is variable, when the light density of sunlight is high, the reflection surface or reflectance is reduced and the light density of sunlight is reduced. When is low, by increasing the reflection surface or reflectance, a certain power generation capability can be exhibited regardless of seasonal changes, geographical positions, etc., and the system can be optimized.

1 is an overall view of a concentrating solar power generation system according to a first embodiment of the present invention. It is a figure showing the effect | action of the system of FIG. 1, (a) represents when the light density of the sun is high, and (b) represents the time when the light density of the sun is low. It is a general view of the concentrating solar power generation system by the 2nd Embodiment of this invention. It is a figure showing the effect | action of the system of FIG. 3, (a) represents when the light density of the sun is high, and (b) represents the time when the light density of the sun is low. It is a general view of the concentrating solar power generation system by the 3rd Embodiment of this invention.

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

  FIG.1 and FIG.2 is a figure showing the concentrating solar power generation system by the 1st Embodiment of this invention. In the figure, a concentrating solar power generation system 10 includes a solar cell panel 12 formed by arranging a large number of solar cells in an array, a reflective panel 14 arranged facing the solar cell panel 12, and a solar cell. A tracking device 16 on which a battery panel 12 and a reflective panel 14 are mounted and supported, and a control device 18 are provided.

  The reflection panel 14 includes a plurality of reflection surface elements 144, 146, and 148 that constitute the reflection surface 142, and a driving device 150. The reflective surface 142 is formed of a curved mirror surface, and faces the solar cell panel 12 so that the solar cell panel 12 is positioned near the focal point.

  The reflective surface element 144 is fixed to the frame of the tracking device 16, and the reflective surface element 146 and the reflective surface element 148 can be moved relative to the reflective surface element 144. That is, the reflecting surface elements 146 and 148 can at least partially overlap the reflecting surface element 144, and the condensed state where the overlap is the largest (FIG. 2A) and the unfolded state where the overlap is the smallest. The driving device 150 transmits an actuator such as a motor and a cylinder, an electric or fluid pressure driving circuit for driving the actuator, and a driving force of the actuator. And the like, and acts on the reflecting surface elements 146 and 148 so that they can be moved along the reflecting surface element 144.

  The tracking device 16 includes a gimbal mechanism 162 that can rotate around two axes in the azimuth direction and the elevation angle direction, and drive units 164 and 166 such as motors that rotate the respective axes.

  The control device 18 includes a geographical position (latitude and longitude) where the concentrating solar discharge system 10 is installed, date / time data (including date and time) at the geographical position, and an elevation angle (altitude) of the sun. ) And the azimuth angle sun direction information are stored, and based on these information, the elevation angle and azimuth angle that the tracking device 16 should take are calculated from the sun direction information corresponding to the current date and time data, and driven. Control signals are sent to the units 164 and 166 to control them. Further, as will be described later, the control device 18 controls the drive device 150 by sending a control signal according to the geographical position, the date data corresponding to the current date and time, and the elevation angle (altitude) of the sun. is there.

  In the concentrating solar power generation system 10 configured as described above, the control device 18 controls the tracking device 16 according to the current date and time data so that the reflection surface 142 basically receives direct light. . This control may be performed continuously or at regular intervals.

  Moreover, the control apparatus 18 calculates the position of the suitable reflective surface elements 146 and 148 according to the present date data and the altitude of the sun.

  For example, when the current date and time is summer or daytime, or when the latitude of the geographical position is a high position in the south-central altitude and the light density of sunlight is high, the control device 18 is connected via the drive device 150. Thus, the reflective surface elements 146 and 148 and the reflective surface element 144 are condensed so that the area of the reflective surface 142 is controlled to be small (FIG. 2A). Thus, the amount of light that is reflected by the reflecting surface 142 and incident on the solar cell panel 12 is limited to prevent overheating, a decrease in efficiency, and the like of the solar cell panel 12.

  On the other hand, if the current date is winter or sunrise, sunset, or if the latitude of the geographical position is a low position in the south, middle altitude, and the light density of sunlight is low, the control device 18 The reflective surface elements 146 and 148 are expanded with respect to the reflective surface element 144 via 150, and the area of the reflective surface 142 is controlled to be large (FIG. 2B). Accordingly, the amount of light reflected by the reflecting surface 142 and incident on the solar cell panel 12 is increased, and the power generation efficiency of the solar cell panel 12 is increased.

  In this way, the concentrating solar power generation system 10 can always generate power regardless of the season, date and time, geographical position, and the like.

  In the control device 18, the positions of the reflecting surface elements 146 and 148 corresponding to the date and time and the geographical position can be stored in a table in advance.

  FIG. 3 is a diagram illustrating a concentrating solar power generation system according to the second embodiment. In the figure, the same or similar members as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  The concentrating solar power generation system 20 includes a solar cell panel 22 formed by arranging solar cells in an array, a reflective panel 24 disposed in the vicinity of the solar cell panel 22, the solar cell panel 22, and the reflective panel. 24, the reflecting mirror 25 arranged so as to face the tracking device 24, the tracking device 16 on which the solar cell panel 22 and the reflecting panel 24 are mounted, and the control device 18.

  The reflection panel 24 includes a plurality of reflection surface elements 244, 245, 246, and 248 that constitute the reflection surface 242, and the driving device 150. The reflection surface 242 is a curved mirror surface and is arranged so as to be arranged around the solar cell panel 22.

  The reflective surface elements 244 and 245 are fixed to the frame of the tracking device 16, and the reflective surface elements 246 and 248 can be moved relative to the reflective surface elements 244 and 245, respectively. That is, the reflecting surface elements 246 and 248 can at least partially overlap the reflecting surface element 244, and the condensed state where the overlap is the largest (FIG. 4A) and the unfolded state where the overlap is the smallest. The driving device 150 can act on the reflecting surface elements 246 and 248 to move them along the reflecting surface elements 244 and 245. It can be done.

  The reflecting mirror 25 is positioned facing the reflecting surface 242 and the solar cell panel 22 so that the light reflected by the reflecting surface 242 is reflected by the solar cell panel 22.

  In the concentrating solar power generation system 20 configured as described above, the control device 18 basically responds to the current date and time data so that the solar cell panel 22 and the reflection surface 242 receive direct light. The tracking device 16 is controlled. This control may be performed continuously or at regular intervals. Therefore, the direct light and the reflected light reflected by the reflecting surface 242 and the reflecting mirror 25 reach the solar cell panel 22. Then, with respect to the reflected light, as in the first embodiment, the control device 18 positions the reflecting surface elements 246 and 248 corresponding to the current date and time and the geographical position via the driving device 150. Regardless of the season, date and time, geographical location, etc., the concentrating solar power generation system 20 can always generate power in an optimized state.

  Next, FIG. 5 is a diagram illustrating a concentrating solar power generation system according to the third embodiment. In the figure, the same or similar members as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  The concentrating solar power generation system 30 includes a solar cell panel 32 that is formed by arranging solar cells in an array, a reflective panel 34 that is disposed to face the solar cell panel 32, and a solar cell panel 32 that reflects the solar cell panel 32. A tracking device 16 on which a panel 34 is mounted and a control device 18 are provided.

  The reflection panel 34 includes a reflection surface 342 and a reflectance adjustment circuit 344. The reflection surface 342 is formed of a curved mirror surface, and faces the solar cell panel 32 so that the solar cell panel 32 is positioned near the focal point. The reflective surface 342 has a variable reflectance, and an electrochromic element or the like using a light-modulating material whose transmittance changes reversibly by application of current or voltage can be used. The reflectance adjustment circuit 344 Can adjust the application of current or voltage to the reflecting surface 342.

  In the concentrating solar power generation system 30 configured as described above, the control device 18 calculates an appropriate reflectance of the reflecting surface according to the date / time data and the altitude of the sun.

  For example, when the current date and time is summer or daytime, or when the latitude of the geographical position is a high position in the south-central altitude and the light density of sunlight is high, the control device 18 causes the reflectance adjustment circuit 344 to operate. Then, the reflectance of the reflecting surface 342 is controlled to be low. Thus, the amount of light reflected by the reflecting surface 342 and incident on the solar cell panel 12 is limited to prevent overheating of the solar cell panel 32, reduction in efficiency, and the like.

  On the other hand, when the current date and time is winter or sunrise or sunset, or the latitude of the geographical position is a low position at the south, middle, and altitude, and the light density of sunlight is low, the controller 18 reflects the reflectance. Control is performed so that the reflectance of the reflecting surface 342 is increased via the adjustment circuit 344. As a result, the amount of light reflected by the reflecting surface 342 and incident on the solar cell panel 32 is increased, and the power generation efficiency of the solar cell panel 32 is increased.

  In this way, the concentrating solar power generation system 30 can always generate power regardless of the season, date and time, geographical position, and the like.

10, 20, 30 Concentrating solar power generation system 12, 22, 32 Solar cell panels 14, 24, 34 Reflecting panel 18 Controllers 142, 242, 342 Reflecting surfaces 144, 146, 148 Reflecting surface elements 244, 245, 246 248 reflective surface elements

Claims (3)

A solar panel,
Disposed adjacent to the solar cell panel, a reflective panel that irradiates the reflected light,
Opposed to the solar cell panel and the reflective panel and spaced apart from each other so that direct light reaches the solar cell panel, the reflected light emitted by the reflective panel is reflected and applied to the solar cell panel Multiple reflectors,
Control means for controlling the reflective panel according to date and time data corresponding to the current date and time,
Bei to give a,
The reflective panel has a variable reflective surface area, and the control means controls the reflective panel to change the reflective surface area according to date and time data. Photovoltaic system.   The concentrating solar power generation system according to claim 1, wherein the reflection panel includes a plurality of reflection surface elements, and the plurality of reflection surface elements are relatively movable. A solar panel,
Disposed adjacent to the solar cell panel, a reflective panel that irradiates the reflected light,
Opposed to the solar cell panel and the reflective panel and spaced apart from each other so that direct light reaches the solar cell panel, the reflected light emitted by the reflective panel is reflected and applied to the solar cell panel Multiple reflectors,
In connection with the corresponding time data to the current time, Bei example and a control means for controlling the reflective panel,
The reflection panel has a variable reflectance of the reflection surface, and the control means controls the reflection panel to change the reflectance of the reflection surface according to date and time data. Type solar power generation system.

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