JPS594624B2 - Solar energy collection and transmission equipment - Google Patents

Description

[Detailed Description of the Invention] Recently, we have entered an era of energy saving, and research and development is being actively conducted in various fields regarding the effective use of solar energy. In order to do this, devices that use solar energy are made to follow the movement of the sun.

Therefore, if the solar energy collection device follows the movement of the sun as described above, the solar energy can be collected by rotating the heat transfer medium around two axes to transmit the focused solar energy. From the focusing device to the fixed part where the heat utilization equipment is installed, it is necessary to arrange the heat transfer medium and signal transmission line so that they are not twisted or twisted so as not to be affected by the rotational movement of the solar energy focusing device. It was difficult.

The present invention was made in view of the above-mentioned circumstances, and
In particular, the solar energy focused by a solar energy focusing device that follows the movement of the sun can be transmitted without being affected by the following movement of the solar energy focusing device, that is, without being twisted or twisted around the heat transfer medium or signal transmission line. This is so that it can be transmitted to a desired position by preventing this from occurring.

FIG. 1 is a schematic configuration diagram of main parts for explaining one embodiment of a solar energy collection and transmission device according to the present invention, and in the figure,
1 is a solar energy focusing device such as a parabolic reflector;
2 is a first rotating shaft for rotating the parabolic reflecting mirror 1; 3 is a fixed arm for integrally fixing the parabolic reflecting mirror 1 to the rotating shaft 2; 4 is a balance weight; 5 is the aforementioned A motor for rotating the first rotation shaft; 6 a support arm for rotatably supporting the first rotation shaft 2; 1 a motor configured integrally with the support arm 6; A second rotation axis 8 is arranged to be orthogonal to the rotation axis 2 of For example, when the parabolic reflector is deviated in the north-south direction with respect to the direction of the sun, the motor 5
and rotate the first rotation axis 2 to rotate the parabolic reflector 1.
When the parabolic reflector 1 is sliding in the east-west direction relative to the sun, a motor (not shown) is rotated to direct the parabolic reflector to the second axis of rotation. The reflector 1 is controlled to accurately face the sun in the east-west direction.

As described above, when a parabolic reflector is designed to follow the movement of the sun and the solar energy focused at the focal position of the parabolic reflector is to be used as thermal energy, the focused It is necessary to transmit thermal energy to the point of use, and in that case, it is necessary to efficiently transmit the thermal energy focused at the rotating part to the fixed part without being affected by the rotating part, using a heat transfer medium. This was extremely difficult due to the twisting and twisting of the parts.

Furthermore, the solar energy collection and transmission device as described above is equipped with a sunlight direction sensor in order to follow the movement of the sun, and the detection signal of the sunlight direction sensor is used to detect the first
However, the lead wire that transmits the detection signal of the sunlight direction sensor also has the same problem of winding and twisting as described above.

The present invention was made in view of the above-mentioned circumstances, and
Regarding sunlight energy, as shown in the figure, a second parabolic reflecting mirror 10 is provided at the focal position of the parabolic reflecting mirror 1 for converting the sunlight reflected by the parabolic reflecting mirror 1 into parallel lines and reflecting the same. A first heat transfer medium, for example, a heat pipe 11, which is coaxial with the first rotating shaft 2 and rotates integrally with the rotating shaft 2;
A second heat transfer medium, for example a heat pipe 12, is provided which is rotatable relative to the second rotating shaft 1 and whose other end is coaxial with the second rotating shaft 1, and as described above, the second heat transfer medium is reflected by the first parabolic reflector 1,
A heat absorber 14 that converts focused sunlight into parallel light beams using a second parabolic reflector 10 and absorbs light energy such as Mendenhall or graphite and converts it into thermal energy.
and then, if necessary, a third light delivery medium, such as a heat pipe, which is guided entirely through the first heat pipe 11 and the second heat pipe 12, and is rotatably coupled to the second heat pipe 12. 13 are transmitted to any desired location.

Note that it is also possible to use the part of the second heat pipe 12 coaxial with the rotating shaft 7 by extending it as is, and in that case, the third heat pipe 13 is not necessary.

Further, reference numeral 19 denotes a transparent container, and the container 19 is used to prevent dust from adhering to the parabolic reflecting mirror and preventing the parabolic reflecting mirror from being swayed by wind or the like.

As described above, according to the present invention, the rotating solar energy focusing device can collect the solar energy focused by the solar energy focusing device without being affected by the solar following movement of the solar energy focusing device. The solar energy concentrating device further comprises a solar direction detection sensor 8 for detecting the direction of the sun, and the solar energy concentrating device further comprises a solar direction detection sensor 8 for detecting the direction of the sun. It is also necessary to transmit a detection signal from the rotating solar energy concentrator to a fixed part where a controller (not shown) is installed.

Various solar direction detection sensors have already been proposed, but
For example, the patent application No. 56-6978 proposed earlier by the present applicant
It is also possible to use a solar direction sensor as described in US Pat.

The sunlight direction sensor described in Japanese Patent Application No. 56-69781 converts the direction of the sun into an analog electrical signal using an optical sensor using a light-to-electrical conversion element. The sunlight direction signal detected by the sensor is guided to a control circuit through a lead wire, and the control circuit rotates the first motor 5 that rotates the first rotation shaft 2 and the second rotation shaft 7. A second motor (not shown) that moves is controlled.

However, in that case, if the electrical detection signal is guided to the control circuit through the lead wire as in the prior art, the problem of winding and twisting of the lead wire also occurs with the lead wire as in the case of the heat transfer medium. arise.

The present invention is designed to prevent such winding and twisting of the signal lead wire. In the present invention, the light emitting diode is activated by the electrical detection signal detected by the solar direction detection sensor 8. controlling the light emission of the light emitting diode, for example, through a light transmission medium 15 as shown in the figure.
around the rotating shaft 7, and from the end 15a of the second
The photocell 16 converts the optical signal into an electrical signal and transmits it to the control circuit via the lead wire 17. The motor is controlled by controlling the circuit.

In addition, when transmitting the detection signal of the solar direction detection sensor 8 through the optical conductor cable 15 as shown in the figure, if it is transmitted depending on the intensity of light, the detection sensitivity of the photocell, the influence of external light (noise), etc. -C% Since there is a problem, it is preferable to convert the detection signal into a pulse signal to control on/off of the light emitting diode, and to transmit this optical pulse signal through the optical transmission medium 15.

Note that as a means for transmitting the optical signal of the optical transmission medium 15 to the lead wire 17, for example, as shown in FIG. The photocells may be arranged in an annular shape to receive optical signals emitted from the optical transmission medium 15, and the lead wires 11 connected to each photocell may be guided to the compensation circuit, or as shown in FIG. As shown in the figure, a light guide 18 is provided, the light-receiving surface 18a is formed in an annular shape around the second rotation axis 7, and the light-emitting end is concentrated at one point 18b, and the photocell 16 is attached to the light-emitting end 18b. It may also be arranged.

FIG. 3 is a schematic configuration diagram showing another embodiment of the present invention. In this embodiment, the solar energy focusing device 1 is replaced with a large number of lenses (7) instead of the parabolic reflector shown in FIG. 20, and a heat receiving end of a heat transfer medium, such as a heat pipe 21, is disposed at the focal position of the lens, and the lens 20
The solar energy that has been focused and introduced into the heat transfer medium 21 is passed through the entire heat transfer medium 21 to a heat source disposed coaxially with the first rotating shaft 2 in the same manner as in the embodiment shown in FIG. The heat transfer medium is introduced into a heat pipe 11, for example, and the subsequent heat transfer path, solar direction detection sensor, etc. are the same as in the embodiment shown in FIG.

As is clear from the above description, according to the present invention, the thermal energy focused by the solar energy focusing device that follows the movement of the sun can be transferred without being affected by the following movement of the solar energy focusing device. For example, it is possible to transmit focused solar energy to a desired location without winding or twisting the heat transfer medium or signal transmission line for transmitting the focused solar energy.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram of main parts for explaining an embodiment of a solar energy collecting device according to the invention, and FIG. 2 a, b
3 is a schematic perspective view of a photocell suitable for use in carrying out the present invention, and FIG. 3 is a schematic perspective view of a main part for explaining another embodiment of the present invention. 1...Solar energy focusing device (parabolic reflector)
, 2... First rotating shaft, 3... Support arm, 4... Balance weight, 5... Motor, 6... Support arm, 1
...Second rotation axis, 8...Sun direction detection sensor, 1
0...Reflector, 11-13...Heat transfer medium, 14.
...Heat absorber, 15... Optical transmission medium for detecting signal transmission,
16...Photocell, 16...Lead wire, 18...
・Light guide, 19 Transparent container, 20...Lens, 21・
...Heat transfer medium.

Claims (1)

[Claims] 1. A solar energy concentrator for concentrating solar energy, a first rotating shaft for rotatably supporting the solar energy concentrating device, and a first rotating shaft for supporting the first rotating shaft and for rotatably supporting the solar energy concentrating device. a second rotation axis perpendicular to the rotation axis; a heat transfer medium for collecting and transmitting solar energy focused by the solar energy focusing device; and a heat transfer medium integrally attached to the solar energy focusing device. a solar light direction sensor; an electro-optical conversion means for converting an electric signal detected by the sensor into an optical signal; and a photoelectric conversion means disposed coaxially with the second rotation axis, and the heat transfer medium is disposed coaxially on the first rotation shaft and the second rotation shaft so as to be rotatable and heat transferable, and a detection signal from the sunlight direction sensor is guided to the photoelectric conversion means, and the photoelectric conversion means 1. A solar energy collection and transmission device characterized in that it is configured to be extracted as an electrical signal via a solar energy source.