TWI629440B - Tilting solar tracking system used at low latitude - Google Patents

Abstract

An inclined sun-tracking system for low latitude, comprising a tilting base and a pointing device, the tilting base is inclined toward a high latitude, tilting the inclined surface of the base and having a fixed inclination angle with the horizontal plane, and the pointing device is mounted on the inclined base On the seat, therefore, when the pointing device performs the plane rotation and the pitch angle rotation, it can not only keep track and point to the sun, but also avoid the violent change of the angular velocity during the rotation, resulting in improper energy consumption.

Description

Tilt-type chasing system for low latitude

The present invention relates to a sun-tracking system, and more particularly to a tilt-type sun-tracking system for use at low latitudes.

Nowadays, in an effort to revitalize economic development, countries around the world need to balance energy security with climate change. Therefore, green energy is gradually being paid attention to, and accelerating the development of a green economy is a common goal of all countries. In the context of the gradual depletion of the earth's energy and resources. Solar photovoltaic, wind power, hydrogen and fuel cells, biomass and other new energy sources have become important issues for the sustainable development of the planet.

Solar energy is basically an inexhaustible source of clean energy. In areas where there is sufficient light and no cover, the supply of energy will continue under the illumination of the sun, and the process of energy generation will not cause environmental pollution. It will not cause greenhouse effect and discharge of waste water and waste gas.

Solar installations are generally three-dimensional facilities, such as solar panels with solar panels, as far as possible facing the sun, to absorb sunlight to convert into electricity for people to use. The energy of sunlight is transmitted to the solar panel and its angle of incidence is relatively high. In theory, the closer to vertical 90 degrees, the higher the energy of photoelectric conversion. To achieve this goal, the design of solar panels and the pursuit of Japanese technology are a major trend in recent years. The actual test can increase the solar power generation efficiency by 30%~50%.

Please refer to FIG. 1. FIG. 1 is a schematic diagram of a solar path 10 in a low latitude region. The illustration is taken in the Tainan area of Taiwan as a sample, and the sun-tracking system is used as a center point of the drawing to view the panorama from a 360-degree angle. However, since in the low latitudes, especially in the summer solstice season, the solar path 10 does not follow the zenith 12 position of the traditional chasing system, according to the figure, the entire solar path 10 is close to the high latitude, from The northern part of the zenith 12 is directly bypassed.

In this way, when it is close to noon, the horizontal rotation of the chasing system will be rotated from the original clockwise, and it will quickly change to counterclockwise rotation. The angular velocity of the horizontal rotation will change drastically, although the response of the controller is fast. The reaction can also be compensated to ensure tracking accuracy, but this will cause more energy loss in the overall chasing system.

Accordingly, it is a primary object of the present invention to provide a tilt-type chasing system for use at low latitudes to solve the above problems.

The object of the present invention is to provide a tilt-type chasing system for low latitude, which not only achieves the effect of chasing the sun for optimal solar energy conversion, but also considers that the solar path in the low latitude region has no zenith problem in the summer solstice period, and the ideal is generated. The chase-day system has a fixed tilt angle, which allows the Chasing System to be more energy efficient when used in low latitudes.

The present invention relates to a tilt-type chasing system for low latitude, which enables the solar device to track and point to the sun, the solar device can be, for example, a solar panel, and the tilt-type chasing system includes a tilting base and a pointing device. .

The inclined base is inclined toward a high latitude and has a fixed inclination angle with respect to the horizontal plane, wherein the inclination angle is a regression line latitude minus a latitude of the inclined day tracking system, plus an off angle, and the deviation angle is greater than or equal to 7 degrees. . The pointing device is mounted on the tilting base, and the sun device is mounted on the pointing device. The pointing device comprises a planar rotating module and an elevation control module.

The planar rotary module is rotated along the plane of the tilting base to control the planar rotation angle of the solar device on the tilting base. The elevation control module controls the pitch angle of the sun device on the tilt base.

Further, the tilt-type sun-tracking system further includes a controller that converts the plane rotation angle and the elevation angle according to the sun's ephemeris data and according to the tilt angle.

In addition, the pointing device further includes an encoder for detecting the actual plane rotation angle and the pitch angle of the pointing device, thereby returning to the controller.

The normal line of the position of the tilting base of the pointing device is higher than that of the pointing device, which is called the inclined zenith. With the inclined sun-tracking system implemented by the present invention, when the moving track of the sun approaches the zenith of the inclined surface, it can be located at the zenith of the inclined surface. The position in the lower latitude direction.

Therefore, the use of the tilt-type chasing system for low latitude according to the present invention, using the conversion of the solar ephemeris data, not only achieves the effect of chasing the sun to obtain the best solar energy conversion utilization, but also considers the solar path in the low latitude region. In the summer solstice period, without the problem of the zenith, the tilting pedestal produces an ideal tilt angle of the chasing system. According to this, the chasing system can avoid the sharp change of the angular velocity generated by the reversal, and it can be more energy-efficient when applied in low latitudes.

The advantages and spirit of the present invention will be further understood from the following detailed description of the invention.

Please refer to FIG. 2. FIG. 2 is a schematic diagram of the inclined day chasing system 30 of the present invention. The present invention relates to a tilt-type chasing system 30 for use at low latitudes for enabling solar devices 32 such as solar panels to track and direct the sun. The tilt-type chasing system 30 includes a tilting base 34 and a pointing device 36.

The tilt base 34 is inclined toward a high latitude and has a fixed inclination angle with respect to the horizontal plane. The pointing device 36 is mounted on the tilt base 34, and the sun device 32 is mounted on the pointing device 36. The pointing device 36 includes a planar rotation module 3602 and an elevation control module 3604.

The planar rotation module 3602 is rotated along the plane of the tilt base 34 to control the planar rotation angle of the solar device 32 on the tilt base 34. The elevation control module 3604 controls the pitch of the solar device 32 on the tilt base 34. angle.

Referring further to FIG. 3, FIG. 3 is a schematic diagram of the tilting base 34 of the present invention calculating the plane rotation angle β and the pitch angle α. The inclined base 34 is inclined toward a high latitude, and the illustration is an embodiment of the inclined sun-tracking system 30 installed in the Tainan area of Taiwan, so it is inclined toward the north, and the inclined base 34 has an inclined surface 3402 which has a horizontal plane 3404 and has a horizontal plane 3404. Fixed tilt angle λ.

The tilt-type chasing system 30 further includes a controller (not shown) that converts the plane rotation angle β and the pitch angle α according to the sun's ephemeris data and according to the tilt angle λ. The plane rotation angle β is a moving process directed to the sun, and the amplitude of the rotation of the plane on the inclined surface 3402 forms a metered angle. The pitch angle α is a moving process directed to the sun, and the angle of the metering formed by the pitch is changed from the inclined surface 3402.

Assuming that the distance from the solar panel to the joint of its rotating shaft is the length D, we establish a three-dimensional coordinate system with the north as the X-axis and the east as the Y-axis, and the solar star calendar data can be known from the date. The horizontal plane rotation angle θ and the horizontal plane elevation angle 为 with the horizontal plane 3404 as the coordinates, by which we can calculate the right-angled coordinates (X, Y, Z) of the sun pointing: X = cos ψ cos θ; Y = cos ψ sin θ; Z = sin ψ.

Next, the plane rotation angle β and the pitch angle α are converted: α=sin ^-1 (X*sinλ+Z*cosλ); β=sin ^-1 . Thus, the pointing device 36 can rotate the solar device 32 according to the plane rotation angle β and the pitch angle α, so that the solar device 32 can achieve the purpose of day-to-day and chasing the sun.

Further, in order to perform system feedback correction, the pointing device 36 further includes an encoder (not shown), and the encoder is mounted on the pointing device 36 for detecting the actual plane rotation angle α' of the pointing device 36 and the pitch angle β. ', by the plane rotation angle α' and the elevation angle β' can be calculated as the right angle coordinates (X1, Y1, Z1) of the sun: X1 = D (cosα'cosβ'cosλ + sinα'sinλ); Y1 = D (cosα'sinβ '); Z1 = D(sinα'cosλ- cosα'cosβ' sinλ).

Next, the actual horizontal rotation angle θ' and the horizontal elevation angle ψ' can be calculated: θ' = cos ^-1 ;ψ'=tan ^-1 By comparing the actual horizontal plane rotation angle θ' with the horizontal plane elevation angle ψ' and the aforementioned horizontal plane rotation angle θ and the horizontal plane elevation angle ψ, the difference can be returned to the controller.

Regarding the aforementioned tilt angle λ, the practical algorithm of the present invention can adopt: the tilt angle λ is equal to the regression line latitude minus the latitude of the tilt type chasing system 30, plus the deviation angle, wherein after the repeated test, the deviation angle is greater than or equal to 7 degrees, and not more than too much is better.

Please refer to FIG. 4. FIG. 4 is a schematic diagram of the sun path 40 relative to the inclined surface 3402 in the present invention. 1 shows that the sun path 10 cannot pass through the zenith 12 at the ground level. In the present invention, the normal position of the inclined surface 342 of the tilting base 34 of the pointing device 36 is higher than that of the pointing device 36, which is called the inclined zenith 42 where the sun moves. When the trajectory approaches the sloping apex 42, the trajectory can be located at a position lower than the latitude of the sloping apex 42 because of the inclination angle λ.

The above-mentioned deviation angle design intention is to make the movement track of the sun cross the inclined zenith 42 as shown in FIG. 4, that is, to make the movement track cross to the south of the slanted zenith 42, so that there is no rotation state of the chasing system by clockwise The rotation is quickly changed to a counterclockwise rotation, and the angular velocity of the horizontal rotation is drastically changed.

Therefore, the tilt-type chasing system 30 for low latitude is provided by the present invention, and the conversion of the solar ephemeris data is used to not only achieve the best of solar energy utilization, but also to optimize the solar energy utilization in the low latitude region. In the summer solstice, without the problem of the zenith, the tilting pedestal 34 produces an ideal chase angle λ of the chasing system, which makes the chasing system more energy efficient when applied in low latitudes.

The features and spirit of the present invention will be more apparent from the detailed description of the preferred embodiments. On the contrary, the intention is to cover various modifications and equivalents within the scope of the invention as claimed.

Tilting chasing system 30 Solar device 32 Tilting base 34 Inclined surface 3402 Water level 3404 Pointing device 36 Plane rotation module 3602 Elevation control module 3604 Sun path 40 Inclined zenith 42 Tilt angle λ Plane rotation angle β Pitch angle α Water plane rotation angle θ horizontal plane pitch angleψ

1 is a schematic view of a solar path in a low latitude region; FIG. 2 is a schematic view of a tilting chasing system according to the present invention; FIG. 3 is a schematic view showing a plane rotation angle and a pitch angle of a tilting base of the present invention; and FIG. A schematic diagram of the path relative to the inclined surface.

Claims (7)

A tilt-type chasing system for low latitude enables a solar device to track and point to the sun. The tilt-type chasing system includes: a tilting base that is tilted toward a high latitude and has a fixed tilt angle with the horizontal plane. And a pointing device mounted on the tilting base, the sun device is mounted on the pointing device, the pointing device includes a planar rotating module, which is rotated along a plane of the tilting base to control The plane rotation angle of the solar device on the inclined base, and an elevation control module control the pitch angle of the solar device on the inclined base. The inclined sun-tracking system according to claim 1, wherein the solar device is a solar panel. The inclined day chasing system according to claim 1, wherein the tilt angle is a regression line latitude minus a latitude of the tilt type chasing system, plus an off angle. The inclined day chasing system according to claim 3, wherein the deviation angle is greater than or equal to 7 degrees. The inclined sun-tracking system according to claim 1, wherein the tilt-type sun-tracking system further comprises a controller, which is converted according to the sun's ephemeris data and according to the tilt angle to obtain the plane rotation angle and The pitch angle. The slanting sun-tracking system of claim 5, wherein the pointing device further comprises an encoder for detecting an actual plane rotation angle and a pitch angle of the pointing device, thereby returning the controller . The inclined sun-tracking system according to claim 1, wherein the pointing device is located at a position higher than a normal of the tilting base, and is called a beveled zenith, wherein the moving track of the sun is close to the inclined surface. At the zenith, the system is located at a lower latitude than the zenith of the slope.