Performance comparison of a double-axis sun tracking versus fixed PV system |
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| Authors: | Rustu Eke Ali Senturk |
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| Affiliation: | 1. Modeling and Simulation in Materials Science Laboratory, Department of Physics, Faculty of Exact Sciences, University Djilali Liabès of Sidi Bel-Abbés, 22000 Algeria;2. Unité de Recherche en Energies Renouvelables en Milieu Saharien (URERMS), Centre de Développement des Energies Renouvelables (CDER), 01000 Adrar, Algeria;3. Electrical Power and Machines Department, Faculty of Engineering, Ain Shams University, Cairo, Egypt;4. Heat Transfer and Solar Energy Laboratory, Department of Mechanical Engineering, Aligarh Muslim University, Aligarh 202002, Uttar Pradesh, India;5. Industrial Engineering Department, Yazd University, Yazd, Iran;1. Electro-Mechanical Systems Laboratory (LASEM), Engineers School of Sfax, Tunisia;2. Higher Institute of Industrial Systems, Gabès, Tunisia;3. Karlsruhe Institute of Technology, Germany;4. Engineers School of Gabès, Tunisia;1. Al-Farabi Kazakh National University, Faculty of Physics and Technology, 71 al-Farabi Ave., Almaty, Kazakhstan;2. Power Electronics and Renewable Energy Research Laboratory, Department of Electrical Engineering, University of Malaya, Kuala Lumpur 50603, Malaysia;3. School of Software and Electrical Engineering, Swinburne University of Technology, Melbourne, VIC 3122, Australia;4. Center of Research Excellence in Renewable Energy and Power Systems, King Abdulaziz University, Jeddah 21589, Saudi Arabia |
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| Abstract: | In the present study, performance results of two double axis sun tracking photovoltaic (PV) systems are analyzed after one year of operation. Two identical 7.9 kWp PV systems with the same modules and inverters were installed at Mugla University campus in October 2009. Measured data of the PV systems are compared with the simulated data. The performance measurements of the PV systems were carried out first when the PV systems were in a fixed position and then the PV systems were controlled while tracking the sun in two axis (on azimuth and solar altitude angles) and the necessary measurements were performed. Annual PV electricity yield is calculated as 11.53 MW h with 1459 kW h/kWp energy rating for 28 fixed tilt angle for each system. It is calculated that 30.79% more PV electricity is obtained in the double axis sun-tracking system when compared to the latitude tilt fixed system. The annual PV electricity fed to grid is 15.07 MW h with 1908 kW h/kWp for the double axis sun-tracking PV system between April-2010 and March-2011. The difference between the simulated and measured energy values are less than 5%. The results also allow the comparison of different solutions and the calculation of the electricity output. |
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