Provides up to 60% annual increase in power output
Operating temperature: -40 to + 60
When using the available solar energy use of different drive systems can increase the efficiency of plants for its production.
On the surface of the Earth from the Sun is constantly fed a certain amount of energy. Per 1 m2 of the surface, perpendicular to the direction of solar rays have sufficient energy constant. Thus, the light output surface of the earth at the equator reaches 1,1 kW / m2, and at our latitudes - about 0.6 kW / m2. Approximately 40% of this energy can be converted into electrical energy by solar batteries.
The solar battery is an alternative energy generator that converts solar radiation into electricity.
Solar energy is inexhaustible and that is very important - environmentally safe. In fact, the only significant disadvantage of generating energy from the sun is the low efficiency of such facilities. For example, currently efficiency solar cell based on silicon single crystal of about 15%.
On what does the efficiency solar power ? It is natural that many more or less significant factors, but the main one is the orientation of the battery cells relative to the radiation source (the sun). It is absolutely obvious fact: rigidly fixed solar panel set up by the midday sun, produces the maximum amount of energy in the afternoon, when the sun's rays fall perpendicularly to its surface. What happens at a different time? The angle of incidence on the battery is small, and the amount of generated power decreases dramatically. But every user wants his solar power plant generates equally high amount of energy throughout the day . And this can be achieved!
The illumination of solar panels should be maintained at an optimum level. To maintain this level of developed various tracking systems - from simple analog to analog-to-digital.
Tracking System sun - a device for orienting a solar panel or to keep the solar reflector turned to the sun.
In order to achieve maximum performance worktops systems they need to be accurate orientation on the sun. In this task tracking device ( Tracker ) is to reduce the angle of incidence of the sun on the working surface of solar panels. The position of the movable part of the tracker may vary by hand lever or with the help of so-called actuators - devices made by electric motors.
Thus, the tracker sets the angles of the working surface of the instrument, to understand it strictly on the sun. In other words, the sun's rays should fall perpendicular to the plane of the solar battery.
Trackers can be implemented based on the different principles . We describe the main ones.
1. Control actuators with multiple photodetectors.
This DEVICE has two or more photodiodes. At movement of the sun illumination photodiodes becomes different; analyzes the illumination device and transmits control signals to the actuators until the flood of light on all solar cells will be the same. And the motor rotates the solar battery from west to east.
Figure 1. The tracker photocell
During the day, solar powered platform will rotate following the movement of the sun. At dusk the system enters standby mode.
Schematic diagrams of these devices simple and cheap. But they have one major drawback: in cloudy weather and pollution photodetectors system poorly efficient.
2. Motion control of the tracker in the azimuthal and zenith angles.
The idea of such devices is based on the fact that for the correct positioning of solar panels, necessary to compensate for the two movements of the Earth:
- daily movement associated with the Earth's rotation around its axis;
- the annual movement associated with the Earth's rotation around the sun.
The structure of such a device includes a timer. Actuators begin their work on a daily timer program (if necessary, and the annual program). But the accuracy of orientation by means of such devices is small, as the sun throughout the year constantly changing time and place of sunrise and sunset, the zenith angle.
3. A method of controlling actuators on the program, which at certain intervals calculates the location of the sun.
This way, perhaps, can be considered the most effective.
According to the internal clock device program gives information about the azimuth and zenith angle (see Fig.) to the control unit.
Thus necessarily be taken into account location tracker, ie parameters such as latitude, longitude and altitude. After that, the new calculated (required) position tracker and made his reorientation.
Tracking Systems Sun can classify on such an important indicator as the number of axles.
Trackers with one axis of rotation
Single-axis trackers have one degree of freedom, which is the axis of rotation.
These trackers are divided into horizontal, vertical and inclined.
Trackers horizontal axis
The rotation axis is oriented horizontally with respect to ground.
These devices provide high efficiency during the spring and summer, when the sun is high in the sky. Rigid frame and a simple mechanism are the basis of high reliability.
Trackers with a vertical axis
The axis of rotation is oriented vertically with respect to ground.
These trackers rotate from east to west during the day.
Vertical axis positioning systems only rotate around a vertical axis, the panels are fixed on a vertically fixed, adjustable angle.
Trackers with a tilted axis of rotation
All the trackers with the axes of rotation between horizontal and vertical is considered as such.
tracker with two axes of rotation
These trackers have two degrees of freedom, which act as axes of rotation.
Typically, these axes are not connected with each other, but work together.
One axis fixed relative to ground. It is the main. Another axis can be considered as secondary. And vice versa.
According to experts, the efficiency of solar cells increased up to 60% , if they are turned towards the sun using sun-tracking systems.
GreenChip company offers you to buy a control system for solar cell and improve the efficiency of your device!