JP6231737B2 - Solar heat collector - Google Patents

Description

  The present invention relates to a solar heat collecting apparatus that collects heat by reflecting sunlight toward a receiver by a reflecting mirror.

In the past, energy has been obtained from fossil fuels such as petroleum. In recent years, however, these fossil fuels have been depleted, greenhouse gases such as carbon dioxide emitted from the use of these fossil fuels, and also for the purchase of fossil fuels. Cost (fuel cost) is a problem.
Therefore, sunlight that can be regenerated and does not require fuel costs has attracted attention as one of new energy sources.

  There are several types of solar heat collecting devices that use this sunlight as an energy source due to the difference in the sunlight condensing method (see Patent Document 1, etc.). Among these, for example, there are types of heat collecting devices called trough type, linear Fresnel type, and tower type.

Here, the trough-type heat collecting device reflects sunlight by using a bowl-shaped parabolic mirror, collects the reflected light on a receiver, and collects solar heat.
In addition, the linear Fresnel-type heat collector has a plurality of reflecting mirrors installed on a plurality of reflecting lines set in parallel in the north-south direction, and on a light receiving line set in the north-south direction above these reflecting mirrors. A receiver is installed, and sunlight is reflected by a reflecting mirror and condensed on the receiver to collect solar heat.
Furthermore, the tower-type heat collector uses a heliostat mechanism to adjust the angle of the reflecting surfaces of the reflectors arranged around the tower, and concentrates sunlight on the receiver provided in the tower to collect solar heat. It heats up.

JP 2012-63086 A

  As described above, various condensing methods are used in the solar heat collector, but first, it cannot be said that the trough-type or linear Fresnel-type methods can sufficiently collect heat from sunlight as an energy source. Therefore, there is a need for a solar heat collecting apparatus that can collect heat more efficiently.

  In the tower type system, for example, a heliostat mechanism as shown in FIG. 5 is used. A T-shaped support (T-bone) is attached to the back surface of the reflector. By rotating each part of the T-bone as shown in FIG. 5, the reflector can be arbitrarily rotated in accordance with the movement of the sun. it can. However, the movement of the T-bone is complicated, and it is difficult to accurately control the angle of the reflecting surface.

  This invention is made | formed in view of the said problem, Comprising: It aims at providing the solar-heat collector which can collect solar heat simply, highly accurately and efficiently.

  In order to achieve the above object, the present invention is a solar heat collecting apparatus having a plurality of reflection lines and one or more light receiving lines, wherein the plurality of reflection lines are set in parallel in the north-south direction. A plurality of reflecting mirrors that reflect sunlight are installed on the reflection lines in each row, and the plurality of reflecting mirrors adjust the angle of the reflecting surface by following the movement of the sun. A heliostat mechanism that adjusts the angle of the reflecting surfaces of the plurality of reflecting mirrors in the east-west direction and the angle of the reflecting surfaces of the reflecting mirrors in the north-south direction. The rotating ring is connected to the plurality of reflecting mirrors via a frame, and the plurality of the rotating rings located on one reflecting line via the frame by the rotation of the rotating ring. Of reflectors The angle of the incident surface is adjusted at the same time, and the actuator is arranged for each of the reflecting mirrors, each actuator has an arm, and the arm and the reflecting mirror are connected to each other. The angle of the reflecting surface of each reflecting mirror is individually adjusted by a backward movement, and the one or more light receiving lines are set at an upper fixed position orthogonal to the plurality of reflecting lines. And a receiver is installed on each light receiving line, and the receiver collects the heat of reflected sunlight from the plurality of reflecting mirrors. A thermal device is provided.

  If it is such, first, it is a cross linear type solar heat collecting device in which the reflection line and the light receiving line are in the above relationship, for example, at a lower cost and more efficiently than the conventional linear Fresnel type It is possible to collect solar heat.

  Furthermore, it has a rotating ring and an actuator as described above, and a control structure for adjusting the angle of the reflecting surface of the reflecting mirror is used to adjust the angle in the east-west direction and the angle in the north-south direction. It is divided into things. Conventionally, the reflective surface is adjusted to an arbitrary angle using only the T-bone, which makes the control complicated. However, as in the present invention, the control is divided into the east-west and north-south angles. Thus, the control can be simplified and the accuracy can be greatly increased. That is, the angle of the reflecting surface can be adjusted easily, at low cost, and with high accuracy. Therefore, sunlight is easily reflected toward the receiver at an appropriate angle, and the heat collection efficiency can be improved also from this point.

In addition, a plurality of the rotating rings are arranged, each rotating ring is provided with a roller, and at least one of the plurality of rotating rings is rotationally driven by a motor. Can be.
If it is such, the angle of the reflective surface of several reflective mirrors on one reflective line can be adjusted simultaneously with a roller and a motor simply and accurately.

Further, the arm of the actuator may be attached to the back surface of the reflecting mirror to support the reflecting mirror.
In such a case, since the reflecting mirror is supported from the back by the arm, the reflecting mirror can be hardly shaken even if wind blows. Therefore, even if the wind blows, sunlight can be appropriately reflected toward the receiver and focused. It can suppress that heat collection efficiency falls under the influence of a wind.

  The rotation of the rotating ring and the forward and backward movement of the arm of the actuator are controlled based on the built-in calendar and angle adjustment data of each reflector with respect to the movement of the sun according to the true sun time. Can do.

  Conventionally, an appropriate angle of the reflecting surface is sequentially calculated according to the actual position of the sun, and the angle of the reflecting surface is adjusted by controlling the T-bone based on the calculation result. However, if the control is performed based on the built-in angle adjustment data as described above, it is not necessary to sequentially calculate from the position of the sun, which is convenient. Since sequential calculation is not necessary, the angle of the reflecting surface can be adjusted without delaying the movement of the sun, and the accuracy and cost can be reduced.

The rotation of the rotating ring and the forward / backward movement of the arm of the actuator can be controlled centrally.
With such a configuration, the rotating ring and the actuator can be controlled uniformly. For example, when collecting reflected light and starting heat collection, it is convenient when adjusting the initial angle of the reflecting surface at the start of heat collection according to the actual sun position or during maintenance.

  As described above, according to the present invention, it is a cross linear type, and furthermore, the angle of the reflecting surface of the reflecting mirror can be adjusted easily and with high accuracy with a simpler control structure than the conventional one. It is possible to collect heat efficiently.

It is the schematic which shows an example of the solar heat collecting apparatus of this invention. It is the schematic which shows an example of a heliostat mechanism. It is the schematic which shows an example of the east-west angle adjustment means. (A) It is a top view. (B) It is a side view. It is the schematic which shows an example of the north-south angle adjustment means. (A) It is an A arrow view in FIG. (B) It is a B arrow line view in FIG. It is explanatory drawing which shows an example of the conventional T-bone system heliostat mechanism.

Hereinafter, embodiments of the present invention will be described, but the present invention is not limited thereto.
FIG. 1 shows an example of the solar heat collecting apparatus of the present invention.
First, the overall mechanism of the solar heat collecting apparatus 1 will be described. A plurality of reflection lines 2 and one or more light receiving lines 3 are set. A plurality of reflecting mirrors 4 are installed on each reflection line 2, and a receiver 5 is installed on the light receiving line 3. Sunlight is applied to the reflecting mirror 4 and reflected, and the reflected light is collected on the receiver 5 to collect solar heat.
The medium in the receiver heated by collecting solar heat is sent to a steam turbine or a gas turbine (not shown) to generate power.

Hereinafter, each part is explained in full detail.
The plurality of reflection lines 2 are set in parallel with each other along the north-south direction. Although FIG. 1 shows an example in which four reflection lines 2A to 2D are set, the number of the reflection lines 2 may be a plurality, and is not particularly limited.

Each of the one or more light receiving lines 3 is set at a fixed position above the reflection line 2. Furthermore, it is set so as to be orthogonal to the reflection line 2 (that is, along the east-west direction).
Although FIG. 1 shows an example in which one light receiving line 3A is set, the number of light receiving lines 3A can be two or more, and can be determined as appropriate. For example, the reflecting mirror 4 and the receiver 5 shown in FIG. 1 can be a single unit, and a plurality of such units can be prepared and arranged in parallel.
Further, the distance in the vertical direction between the light receiving line 3 and the reflecting line 2 is not particularly limited, and can be appropriately determined according to various conditions so as to easily collect sunlight, for example.

  As can be seen from the relationship between the reflection line and the light receiving line, the solar heat collecting apparatus 1 is of a cross linear type, and can efficiently collect solar heat at low cost.

Next, the plurality of reflecting mirrors 4 will be described. The reflecting mirror 4 only needs to have a reflecting surface 6 capable of reflecting sunlight, and the shape of the reflecting mirror 4 is not particularly limited. For example, the sunlight reflecting surface 6 can be flat or concave. The size is not limited, and for example, the reflecting surface 6 can have an area of about 3 m × 1.5 m.
A plurality of reflecting mirrors 4 are installed on each row of the reflecting lines 2A to 2D. Although FIG. 1 shows an example in which six sheets are installed in each row, the number is not limited to this. For example, it can be determined according to the size of the installation location.

The reflecting mirror 4 is provided with a heliostat mechanism 7. Here, an example of the heliostat mechanism 7 is shown in FIG.
The heliostat mechanism 7 adjusts the angle of the reflecting surface 6 by following the movement of the sun. With respect to the reflecting surface 6 of the reflecting mirror 4, it has means for adjusting the angle in the east-west direction (east-west angle adjusting means 8) and means for adjusting the angle in the north-south direction (north-south angle adjusting means 9). Although here is an example for the case of the reflecting mirror 4A ₁ to 4A ₆ on reflection line 2A, it is provided with these means also in other reflective line 2B-2D.
Conventionally, the angle of the reflecting surface is adjusted to an arbitrary angle using only the T-bone as shown in FIG. 5, but the heliostat mechanism 7 according to the present invention adjusts the angle between the east-west angle and the north-south angle. Is different. These means can adjust the angle of each direction independently of each other. Therefore, the angle can be adjusted with high accuracy while the control is simple.

First, the east / west angle adjusting means 8 will be described. FIG. 3 shows an example of the east / west angle adjusting means 8. 3A is a top view of the east-west angle adjusting means 8, and FIG. 3B is a side view thereof. Incidentally, one the installed reflector on a reflective line 2A of _{4 (4A} 1 _{~4A 6)} are also described together.

As shown in FIG. 3A, the east-west angle adjusting means 8 includes a rotating ring 10 and a frame 11.
Also, FIG. 2, as shown in FIG. 3 (A), the frame 11 is disposed so as to surround all of the reflecting mirror 4A ₁ to 4A ₆ arranged in series in the north-south direction, each of the reflecting mirrors 4A It is coupled with the east and west sides of ₁ to 4A _6. Here, the reflecting mirrors 4A _{1 to} 4A ₆ are connected at the center of the side surfaces thereof, and the reflecting mirrors 4A _{1 to} 4A ₆ are centered on an axis (dotted line in FIG. 3A) connecting the connecting parts. Can rotate in the north-south direction.

As shown in FIG. 3A, the rotating ring 10 is arranged at both ends and the center of the frame 11 so as to surround the frame 11 from the outside, for example, and is connected to the frame 11. That is, the rotating ring 10 and the reflecting mirrors 4A _{1 to} 4A ₆ are connected via the frame 11.
In addition, although the case where the number of the rotating rings 10 was three was mentioned here as an example, it is not limited to this, What is necessary is just one or more. For example, it may be arranged only at the center of the frame 11, but it is particularly preferable that there are a plurality of frames 11, and more than the case of FIG.
The reflecting mirrors 4A _{1 to} 4A ₆ can be appropriately held and can be rotated at the same time, and the shape and size of the frame 11, the number and size of the rotating ring 10 can be appropriately determined. In consideration of the weight of the reflecting mirror and the like, the material and the like can be determined each time so that the frame 11 or the like is not bent.

Further, as shown in FIG. 3B, each rotary ring 10 is provided with a roller 12 for rotating the rotary ring 10 in the east-west direction. The means for rotating the rotating ring 10 is not particularly limited. However, with such a roller 12, the rotating ring 10 can be easily rotated, and the reflecting mirror 4 (4A ₁ ) connected via the frame 11 is used. to 4A ₆₎ it can be the to simultaneously rotate in the east-west direction.
Here, two rollers 12 are arranged for each rotating ring 10. The rotating ring 10 is rotatably supported by the roller 12 from below. The number and size of the rollers 12 are not particularly limited, and can be determined as appropriate.

A motor 13 is connected to the roller 12 in at least one of the rotating rings 10. The motor 13 can control the rotational drive of the roller 12 to rotate the roller 12 at a desired timing and number of rotations. Thereby, it is possible to accurately control the rotation of the rotating ring 10 with an accuracy of mR to several tens of mR.
The number of motors 13 to be arranged can be determined as appropriate.
Further, the degree of rotation (rotation range) is not particularly limited, but the reflecting mirror 4 can be rotated 90 ° per 12 hours so that the reflecting mirror 4 can reflect sunlight to the receiver 5 during the day. It is good to prepare the motor 13 and the roller 12 which are the same.

  Such an east / west angle adjusting means 8 is provided for each line of reflection lines. For this reason, it is possible to rotate all the reflecting mirrors installed on one reflection line simultaneously in the east-west direction, and to simultaneously adjust the angles in the east-west direction. Moreover, the angle of the reflecting mirror can be adjusted independently for each reflecting line.

Next, the north-south angle adjusting means 9 will be described. FIG. 4 shows an example of the north-south angle adjusting means 9. FIG. 4A is a view taken in the direction of the arrow A in FIG. 2, and also illustrates the rotating ring 10, the frame 11, and the reflecting mirror 4 so that the positional relationship of each can be easily grasped. FIG. 4B is a view taken in the direction of arrow B in FIG. 2 and also shows the frame 11 and the reflecting mirror 4 together.
The north-south angle adjusting means 9 is individually provided for the reflecting mirror 4 and includes an actuator 15 having an arm 14. The actuator 15 moves the arm 14 forward and backward. The arm 14 is connected to the reflecting mirror 4.

  Here, the tip of the arm 14 is connected to the back surface of the reflecting mirror 4, and the back surface of the reflecting mirror 4 can be pushed and pulled by its forward / backward movement, whereby an axis connecting the connecting portions with the frame 11. The reflecting mirror 4 can be rotated in the north-south direction around the center. The angle of the reflecting surface 6 of the reflecting mirror 4 in the north-south direction can be adjusted by the distance of the arm 14 moving forward and backward.

  The forward / backward range (stroke range) of the arm 14 is not particularly limited as long as it can appropriately reflect sunlight toward the receiver throughout the year. Due to the inclination of the earth's axis, the altitude of the sun changes in a range of (23.4 ° × 2) throughout the year, so that the stroke range of the arm 14 is adjusted so that the angle of the reflecting surface 6 can be adjusted at least by that range. It is good to decide.

  Further, the arm 14 rotates the reflecting mirror 4 by pushing or pulling the back surface of the reflecting mirror 4 as described above, and simultaneously supports the reflecting mirror 4 from the back surface side. In the conventional T-bone method of FIG. 5, the reflecting mirror is shaken by the wind, and the reflection to the receiver may be adversely affected. However, thanks to the support by the arm 14 of FIG. It is possible to effectively prevent the mirror 4 from shaking. Therefore, it is possible to prevent the reflection to the receiver from being appropriately performed due to the swing of the reflecting mirror 4, and it is possible to suppress the heat collection efficiency from being lowered.

  In addition, although the case where it connected with the arm 14 on the back surface of the reflective mirror 4 was demonstrated, naturally it is not limited to this, The connection part of the arm 14 and the reflective mirror 4 can be determined suitably. For example, it can be connected to the arm 14 on the side surface of the reflecting mirror 4.

  Since the reflecting mirror 4 rotates in the east-west direction together with the frame 11 as described above, the actuator 15 itself may be fixed to the frame 11, for example. In this way, even if the frame 11 and the reflecting mirror 4 are rotated in the east-west direction by the rotating ring 10 in order to adjust the angle of the reflecting surface 6 in the east-west direction, the actuator 15 is fixed to the frame 11, so The angle of the reflecting surface 6 in the north-south direction can be adjusted by the arm 14 of the actuator 15 in the same manner as before rotating in the direction.

  Such a north-south angle adjusting means 9 is provided for each reflecting mirror. For this reason, the reflecting mirror 4 can be individually rotated in the north-south direction, and the angle of the reflecting surface 6 in the north-south direction can be adjusted. Moreover, the angle can be adjusted independently for each reflecting mirror.

The mechanism for adjusting the angle of the reflecting surface 6 by rotating the reflecting mirror 4 has been described above for the east-west angle adjusting means 8 and the north-south angle adjusting means 9.
In the conventional T-bone system as shown in FIG. 5, the reflecting surface must be rotated in various directions using only the T-bone and adjusted to an arbitrary angle, which makes control complicated.
However, in the present invention, the angle adjustment of the reflecting surface is shared by the east-west angle adjusting means having the rotating ring and the north-south angle adjusting means having the actuator. That is, the east-west angle adjustment means only needs to adjust the angle in the east-west direction, and the north-south angle adjustment means only needs to adjust the angle in the north-south direction. The angle of the reflecting surface can be adjusted with high accuracy to an arbitrary angle by combining them. Moreover, since each mechanism is simple, the cost is low.

It should be noted that not only the reflecting surface 6 can be adjusted to an arbitrary angle, but also the heliostat mechanism 7 must be adjusted so that the angle actually follows the movement of the sun.
In order to facilitate such angle adjustment, for example, the angle adjustment data of the reflecting mirror 4 with respect to the movement of the sun according to the calendar and true sun time is built in the east / west angle adjustment means 8 and the north-south angle adjustment means 9. good. As described above, in the east / west angle adjusting means 8, the roller 12 is rotationally controlled by the motor 13, the rotation of the rotating ring 10 is controlled, and the angle adjustment in the east-west direction of the reflecting surface 6 of the reflecting mirror 4 is performed. . The movement of the sun can be estimated in advance from the calendar and true sun.

Therefore, the motor 13 is provided with a computer for driving and controlling the motor 13 so that the angle of the reflecting surface 6 of the reflecting mirror 4 is appropriately adjusted following the movement of the sun. The rotation degree of the rotating ring 10 and the control value (angle adjustment data) pattern of the motor 13 are input. When actually reflecting sunlight to the receiver 5, the angle of the reflecting surface 6 can be easily adjusted by driving the motor 13 based on the angle adjustment data in the computer and controlling the rotation of the rotating ring 10. It can be performed.
In particular, the east-west angle adjusting means 8 may be rotated at a constant speed with respect to the sun moving from east to west, and extremely stable control is possible. In the conventional T-bone method, the reflecting mirror may rotate greatly in order to correspond to the position of the sun, and it may be necessary to rapidly increase the rotation speed. In the present invention, such a rapid rotation is required. The need can be reduced.
Instead of preparing a computer separately, for example, angle adjustment data can be input and controlled in a memory and a control circuit built in the motor 13.

  The same applies to the north-south angle adjusting means 9. That is, the arm 14 of the actuator 15 for adjusting the angle of the reflecting surface 6 of the reflecting mirror 4 appropriately following the movement of the sun in the memory of the actuator 15 or in the computer provided. The pattern of the control value (angle adjustment data) of forward / backward movement is input in advance. Then, by controlling the forward / backward movement of the arm 14 of the actuator 15 based on the angle adjustment data, the angle of the reflecting surface 6 can be easily adjusted.

  Of course, as in the prior art, the position of the sun may be calculated sequentially, and the angle of the reflecting surface corresponding to the position of the sun may be calculated to control the east-west angle adjusting means 8 and the north-south angle adjusting means 9. However, if the built-in data patterned as described above is used, the conventional sequential calculation is not necessary, and the angle of the reflecting surface is not adjusted after performing such a sequential calculation. Therefore, it is possible to respond quickly without delaying the movement of the sun, and it is simple and highly accurate. It can also lead to an increase in heat collection efficiency. It can be determined appropriately according to the cost and the like.

Further, the east-west angle adjusting means 8 and the north-south angle adjusting means 9 can be controlled independently. However, the present invention is not limited to this, and a central controller 16 is provided as shown in FIG. It is also possible to control the rotation of the rotating ring 10 and the forward and backward movement of the arm 14 of the actuator 15 by the central control device 16 by connecting to the motor 13 of the motor No. 8 and the actuator 15 of the north-south angle adjusting means 9. For example, the central controller 16 can control the initial angle of the reflecting surface 6 at the start of heat collection or maintenance. Based on the position of the sun, the control data of the motor 13 and the like for adjusting the angle of the reflective surface 6 and the angle to an appropriate angle is calculated, and the initial angle of the reflective surface 6 is calculated by the central controller 16 based on the calculation result. Can be adjusted.
Then, after adjusting the initial angle, the central control device 16 may continue to adjust the angle, or the angle adjustment may be performed using the built-in data as described above.

Next, the receiver 5 will be described.
The receiver 5 itself is not particularly limited, and its shape and size can be determined as appropriate. For example, a conventional one can be used. What is necessary is just to condense reflected light of sunlight and collect heat efficiently.
The receiver 5 has a heat receiving pipe through which a medium (air, carbon dioxide, etc.) flows, and the medium in the heat receiving pipe is warmed by solar heat collected by the receiver 5, and the warmed medium is sent to a steam turbine or the like. Used for power generation.

EXAMPLES Hereinafter, although an Example and a comparative example are shown and this invention is demonstrated more concretely, this invention is not limited to these.
(Example)
Using the cross linear solar heat collecting apparatus of the present invention as shown in FIG. 1, a simulation was performed in which sunlight was condensed to warm the medium in the heat receiving tube. The simulation conditions were set as follows.
Set up a single light receiving line and install a receiver (height 20m above the ground), 80 reflective lines (distance between lines is 1.5m), 30 reflectors per line (size (1.5 m × 1.5 m) was installed (the area of the total reflection mirror was 5400 m ² ).
All reflectors were placed on the north side of the receiver. The horizontal distance between the tip of the first reflecting mirror on the side closer to the receiver and the receiver was set to 5 m.
The angle adjustment of the reflecting mirror was performed using the east-west angle adjusting means and the north-south angle adjusting means shown in FIG. Based on the built-in calendar and angle adjustment data of each reflector with respect to the movement of the sun according to the true sun time, the angle of the reflector was adjusted by controlling the rotation of the rotating ring and the forward and backward movement of the actuator arm.

Other conditions are as follows.
Blocking (blocking of reflected light by the reflecting mirrors) was set to 0 to 0.2 (that is, 20% or less).
The date and time was 10:00 am Equinox and the declination was 36.8401632 degrees (Spain Almeria).

  Looking at the results of the simulation, the average cosine effect of all the reflectors is 0.941 (1.00 when the reflector usage efficiency is 100%), and most of the reflectors are effectively used for condensing. It became clear that we could do it.

(Comparative example)
Using a conventional linear Fresnel-type solar heat collector (12 rows of reflection lines and light reception lines in the north-south direction), a simulation was performed to condense sunlight and warm the medium in the heat-receiving tube. The simulation conditions were set as follows.

Twelve rows of reflectors having a width of 1.5 m and a length of 300 m (6 rows on the east side and 6 rows on the west side with respect to the receiver) were installed (the area of the total reflector is 5400 m ² , as in the example).
In addition, by setting the distance between the reflecting mirrors to 1.5 m, the blocking ratio was made substantially the same as in the example.
The date and time and place were the same as in the example.

  Looking at the results of the simulation, the average cosine effect of all the reflectors was 0.799, and about 80% of the reflectors could be used for condensing effectively.

  In the example and the comparative example, the light collecting efficiency per mirror is 14% larger in the example. This difference varies depending on the latitude and time, and depending on these conditions, a difference of 40-80% or more is observed. According to the present invention, since the number of reflectors and heliostat mechanisms can be reduced, the cost for plant construction can be reduced.

  The present invention is not limited to the above embodiment. The above-described embodiment is an exemplification, and the present invention has substantially the same configuration as the technical idea described in the claims of the present invention, and any device that exhibits the same function and effect is the present invention. It is included in the technical scope of the invention.

DESCRIPTION OF SYMBOLS 1 ... Solar thermal collector of this invention, 2, 2A-2D ... Reflection line,
3, 3A ... Light receiving line 4, 4A _{1 to} 4A ₆ ... Reflector, 5 ... Receiver,
6 ... reflective surface, 7 ... heliostat mechanism, 8 ... east-west angle adjusting means,
9 ... North-south angle adjusting means, 10 ... Rotating ring, 11 ... Frame,
12 ... Roller, 13 ... Motor, 14 ... Arm, 15 ... Actuator,
16: Central controller.

Claims (4)

A solar heat collecting apparatus having a plurality of reflection lines and one or more light receiving lines,
The plurality of reflection lines are set in parallel in the north-south direction, and a plurality of reflection mirrors that reflect sunlight are installed on the reflection lines in each row, and the plurality of reflection mirrors Has a heliostat mechanism that adjusts the angle of the reflecting surface to follow the movement of the sun,
The heliostat mechanism includes a rotating ring that adjusts the angle of the reflecting surfaces of the plurality of reflecting mirrors in the east-west direction, and an actuator that adjusts the angle of the reflecting surfaces of the plurality of reflecting mirrors in the north-south direction.
The rotating ring is connected to the plurality of reflecting mirrors through a frame, and an angle of a reflecting surface of the plurality of reflecting mirrors on one reflecting line through the frame by the rotation of the rotating ring. Are adjusted at the same time,
The frame is arranged so as to surround all of the plurality of reflecting mirrors on the one reflecting line, and in the central part of the side surface on the east side and the west side of each reflecting mirror, And is rotatably connected to, and
The actuator is arranged for each reflecting mirror, each actuator has an arm, the arm and the reflecting mirror are connected, and the angle of the reflecting surface of each reflecting mirror is individually determined by the forward and backward movement of the arm. To be adjusted to
The actuator is attached to the frame, and the arm of the actuator is attached to the back surface of the reflector, and adjusts and supports the angle of the reflector that is rotatably connected to the frame in the north-south direction. And
The one or more light receiving lines are set at a fixed position above and perpendicular to the plurality of reflection lines, and one receiver is installed on each light receiving line. A solar thermal collector that collects heat of reflected sunlight from the plurality of reflecting mirrors.   A plurality of the rotating rings are arranged, each rotating ring is provided with a roller, and at least one of the plurality of rotating rings is rotationally controlled by a motor. The solar heat collecting apparatus according to claim 1, wherein the solar heat collecting apparatus is provided.   The rotation of the rotating ring and the forward and backward movement of the arm of the actuator are controlled based on built-in calendar and angle adjustment data of each reflector with respect to the movement of the sun according to the true sun time. The solar heat collecting apparatus according to claim 1 or 2. 4. The solar heat collecting apparatus according to claim 1, wherein the rotation of the rotating ring and the forward and backward movement of the arm of the actuator can be controlled centrally. 5.

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