Yasir Ali, Khawaja Haider Ali, Aftab Ahmed, Ahmad Waqas and Qasir Ali.
The increasing need for energy and bad impacts of conventional sources of energy on the environment, especially in Pakistan, has shown to the quest for sustainable, environment-friendly and clean energy resource. Wind energy can be the best option in this regard. Savonius rotor is simple vertical axis wind turbine which is illustrated as economical, simplistic in design and construction and has satisfying starting torque at lower wind speeds. This makes it capable of generating mechanical energy at low wind speed.
In the present work improvement in the construction of conventional Savonius blade was suggested to discover the best configuration of Savonius blade design. Flatness in the Savonius blade originating from the shaft of the rotor was proposed in four steps i.e. 25%, 50%, 75%, and 100% flatness. Above four blade configurations were designed, manufactured and tested. The performance of four configurations of the blade was investigated and then compared with the conventional form of Savonius blade (model-1). According to the observation, the blade configuration with 25%, 50%, and 75% flatness are comparable with the conventional Savonius configuration, whereas the blade configuration with 100% flatness contributes unoptimistic performance. The blade configuration with 50% flatness is more effective than the conventional Savonius configuration which gives 74% optimum increase with its performance.
Blade flatness, Configuration, Renewable energy, Wind energy, Savonius rotor.
Cite this: Yasir Ali, Khawaja Haider Ali, Aftab Ahmed, Ahmad Waqas and Qasir Ali,“ Blade Modification and Performance Analysis of Micro Savonius Rotor ”, BUJICT Journal, Volume 10, Issue, II December 2017, pp. 1-5.
 Mahmoud, N. H., El-Haroun, A. A., Wahba, E., & Nasef, M. H. (2012). An experimental study on improvement of Savonius rotor performance. Alexandria Engineering Journal, 51(1), 19-25.  Alexander, A. J., & Holownia, B. P. (1978). Wind tunnel tests on a Savonius rotor. Journal of Wind Engineering and Industrial Aerodynamics, 3(4), 343-351.  Modi, V. J., Roth, N. J., & Fernando, M. S. U. K. (1984). Optimum-configuration studies and prototype design of a wind-energy-operated irrigation system. Journal of Wind Engineering and Industrial Aerodynamics, 16(1), 85-96.  Adriane Prisco, P., Horcio Antonio, V., & Joo Vicente, A. (2012). A review on the performance of Savonius wind turbines. Renewable and Sustainable Energy Reviews.  Saha, U. K., & Rajkumar, M. J. (2006). On the performance analysis of Savonius rotor with twisted blades. Renewable energy, 31(11), 1776-1788.  Saha, U. K., Thotla, S., & Maity, D. (2008). Optimum design configuration of Savonius rotor through wind tunnel experiments. Journal of Wind Engineering and Industrial Aerodynamics, 96(8-9), 1359-1375.  Kamoji, M. A., Kedare, S. B., & Prabhu, S. V. (2011). Experimental investigations on two and three stage modified Savonius rotor. Wind Engineering, 35(4), 483-509.  Mohamed, M. H., Janiga, G., Pap, E., & Thévenin, D. (2011). Optimal blade shape of a modified Savonius turbine using an obstacle shielding the returning blade. Energy Conversion and Management, 52(1), 236-242.  Sheldahl, R. E., Feltz, L. V., & Blackwell, B. F. (1978). Wind tunnel performance data for two-and three-bucket Savonius rotors. Journal of Energy, 2(3), 160-164.  Kacprzak, K., Liskiewicz, G., & Sobczak, K. (2013). Numerical investigation of conventional and modified Savonius wind turbines. Renewable energy, 60, 578-585.  Golecha, K., Eldho, T. I., & Prabhu, S. V. (2011). Influence of the deflector plate on the performance of modified Savonius water turbine. Applied Energy, 88(9), 3207-3217.  Altan, B. D., & Atılgan, M. (2008). An experimental and numerical study on the improvement of the performance of Savonius wind rotor. Energy Conversion and Management, 49(12), 3425-3432.  Chan, C. M., Bai, H. L., & He, D. Q. (2018). Blade shape optimization of the Savonius wind turbine using a genetic algorithm. Applied Energy, 213, 148-157.  Alom, N., & Saha, U. K. (2018). Performance evaluation of vent-augmented elliptical-bladed savonius rotors by numerical simulation and wind tunnel experiments. Energy, 152, 277-290.  Ramadan, A., Yousef, K., Said, M., & Mohamed, M. H. (2018). Shape optimization and experimental validation of a drag vertical axis wind turbine. Energy, 151, 839-853.