A Water-Balance-Based Dual-Axis Sun Tracking System
ประเภทบทความ :
บทความวิชาการ
หมวดหมู่ :
วิทยาศาสตร์
This paper presents a new technique for solar tracking system with very low power consumption. In
order to track the sunlight, the solar panels connecting to the floated-balls are moved by water level balance
adjusting. The proposed system is controlled by micro-controller. The signals from light-dependent resistor (LDR)
sensor and reference voltage are compared and used to control the 12 V DC windshield washer pump for adjusting
the water level which corresponds to the sunlight perpendicular. As a result, the accuracy of solar tracking
depending on water level varying is achieved. The proposed system has ability to control with 2 axes; north-south
and east-west. A comparison result between the proposed system and conventional method with one solar panel
shows that the improvement of the sun power harvest of 7.91 W or higher than 37.63 % is given by the proposed
system. It is also found that by using one solar panel for five days operating with twelve hours per day, the proposed
solar tracking system has ability to harvest the energy of 347.16 Wh/day with power consumption of 0.66 Wh/day.
When three solar panels are employed, the energy harvest of 1212.84 Wh/day with power consumption of 1.76
Wh/day is obtained. Additionally, the power consumptions between the proposed system and the DC motor
controller of solar tracking systems using for one solar panel are compared. The results show that the DC motor
controller shows power consumption of 10.8 Wh/day or 1.147 % whereas the energy of 0.66 Wh/day or 0.19 % is
consumed by the proposed system. It is reveal that the lower power consumption of 0.958 % is given by the
proposed system. Therefore, the proposed system has ability to reduce the power consumption of the solar tracking
system.
วันที่ลง01/07/2019
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