Solar panel system rotates in the direction of the sun – Up to 30% higher efficiency

 

 

To limit the effects of climate change, renewable energy is increasingly widely developed, in both developed and developing countries. In particular, using solar panels to convert sunlight into electricity is one of the most common methods today. However, because the cost of solar panels is often quite high, how to improve their performance becomes a problem for scientists and energy engineers.

If the earth is taken as a standard, the sun revolves around the earth's orbit, the direction of the sun's rays relative to the earth's plane always changes with time. On sunny days, the sun moves at an angle of about 180 degrees relative to a fixed point on the ground. Meanwhile, solar panels are most efficient when the direction of the sun's rays is perpendicular to its plane. The absorbed energy decreases with the cosine of the solar azimuth. Therefore, a solar panel system placed on a fixed support frame will capture much less light energy than a solar panel that can be rotated to catch all the sunlight.

Solar Tracker system will automatically navigate to keep the radiation beams always perpendicular to the panel surface during daylight hours, thereby increasing the efficiency of the rig. the battery. The automatic swing system was first built in 1990 by F.M.Al Naima and N.A.Yaghobiam, operating entirely on mechanical transmission. Since then, there have been more studies on automatic solar cell rotation systems to increase operational efficiency.

Currently, in the world, there are many types of self-rotating truss being applied. However, in general, it can be classified into 2 common rotating structures: single-axis rotating construction and two-axis rotating structure. Single-axis rotating structure has slightly lower efficiency than two-axis structure, but has the advantages of large rotation angle, simple manufacturing, easy assembly, operation and maintenance, so it is more commonly used. According to researches and practical applications, the efficiency of single-axis gantry can be increased by up to 30% compared to the fixed truss, the energy obtained is much higher than that of the fixed truss in the morning and evening hours. 
 

In order to optimize the system performance, which is also the profit of the solar power plant, more and more investors choose to install the system that automatically rotates the solar cells in the direction of the sun instead of the system on the truss frame. permanent.

Solar energy is a clean, free and inexhaustible source of energy. According to calculations by scientists, if 10% of the solar energy is collected on the entire earth's surface, it can provide up to 20TW of electricity (20 million MW). Collecting all the solar energy on earth in 72 hours would be equivalent to the energy from all the coal, oil and natural gas mines around the world. It is hoped that, with the diligent research of scientists, in the future solar power technologies will continue to be improved, helping to improve operational efficiency, promoting the sustainable development of the solar power industry. contribute to reducing climate change and protecting the environment.