Abstract
In this work we present a new method for the measurement of the light intensity for the solar panels with dual axis tracking system by using optical fiber to conduct the direct sunlight to the light dependent resistors (LDR). With this method we keep away the influence of the temperature on the photoresistors which measure the light intensity. The measurements with the proposed system was done at the same time and place with a classical system with the same configuration, but with the LDRs directly exposed to the sunlight. The results highlighted that, in cloudy conditions when the sunlight is not in direct path on the solar panels and suffers a high scattering, the optical fiber system is more efficient compared to the classical one with differences up to 18% in the generated power.
Highlights
In the last years we are witnesses to the climatic changes caused by the high pollution of the fossil fuels
The best widespread techniques to detect the light intensity is with light dependent resistors (LDR) whose resistance decreases with the increase of the light intensity
One end of the fibers is placed on top of the solar panel and separated by a 3.5cm wall and the other end is connected in the control box (Fig.6) where the LDRs are attached to the electronic shield of the Arduino Uno board
Summary
In the last years we are witnesses to the climatic changes caused by the high pollution of the fossil fuels. There are restricted not to follow the movement of the Sun for a perpendicular radiation in different seasons of the year [7] Despite of this limitation these types of systems are capable to raise the captured power with 35% as against the fix photovoltaic panels [8]. The bidirectional tracking system can be considered the best one, by following the Sun movement in a manner to have always perpendicular radiations on the panel during all the days of a year (Fig.). The bidirectional tracking system can be considered the best one, by following the Sun movement in a manner to have always perpendicular radiations on the panel during all the days of a year (Fig.1)
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