วารสารวิชาการเทคโนโลยีอุตสาหกรรม (J. Ind. Tech.) อยู่ในฐานข้อมูล TCI กลุ่ม 2 (2563) มีค่า JIF = 0.094 | The Journal of Industrial Technology (J. Ind. Tech.) is indexed in TCI Tier 2 (2020) with impact factor, JTIF 0.094

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 61

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