Abstract
Increase in the world energy demand has made renewable energy source as one of the best option. It is finding wide utility in comparison with the other sources of energy. Solar energy is one of the major source of renewable energy. The abundance of solar energy in India makes it highly desirable to exploit but due to the limitations of technology, only a fraction of the energy can be extracted and used. This paper describes a concept for solar detection sensor implementation in Photo-Voltaic (PV) dual-axis solar tracking systems. The system uses only three units of identical light-detecting- resistors (LDR) arranged on the three sides of tetrahedron geometry and is able to track the light source position at the strongest intensity of visible light. On the basis of comparative study of outputs of all the three LDRs, the panel will tilt so as to get maximum output from the system. This system results in a wide field of view with minimum error and also has advantages in terms of sensor quantity, size of the system, accuracy and effectiveness.
Highlights
Increase in the world energy demand has made renewable energy source as one of the best option
The light sensing sensors such as photodiodes OR Light Dependent Resisters (LDR’s) detect the intensity of light. This light intensity is converted into the equivalent resistance by the light-detecting- resistors (LDR). This output of LDR is given to microcontroller which detects the maximum intensity light direction according to the Program fed to it
The tetrahedron geometry is used to mount the three LDRs on the three sides of tetrahedron and the connecting wires are taken from the base side of the same.[1]
Summary
The common problem in solar Tracking is the complex movement of sun. The sun moves from east to west along a fixed solar path everyday. The sun moves through 46° north and south during 21st June to 21st December which is as shown in below figure 1. A dual axis solar tracker can account for both the daily and seasonal motion of the sun
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