مهندسی مکانیک مدرس

مهندسی مکانیک مدرس

Self-Starting Capability Improvement of Single and Dual Hybrid Darrieus-Savonius VAWTs, Incorporating a Gear Mechanism

نوع مقاله : پژوهشی اصیل

نویسندگان
سینا حسینی راد 1
مرتضی ترقی 2
فرزاد غفوریان 1
مهدی مقیمی 1
1 دانشکده مهندسی مکانیک- دانشگاه علم و صنعت ایران
2 دانشکده مهندسی مکانیک- دانشگاه علم و صنعت ایارن
10.48311/mme.2025.27795
چکیده
The substantial increase in greenhouse gas emissions has catalyzed the growth of renewable energy sources. In this context, vertical axis wind turbines (VAWTs) have gained significant traction due to their numerous advantages. Notably, Darrieus VAWTs have demonstrated acceptable efficiency; however, their reliance on initial torque and challenges associated with self-starting capabilities prompted advancements in hybrid Darrieus-Savonius VAWTs. This configuration has primarily proven effective in enhancing efficiency within a low-tip speed ratio (TSR) range. However, hybrid rotors tend to experience performance degradation in high-TSR ranges. To address the performance decline observed in the high-TSR range, this study proposes an innovative solution by developing a dual-shaft hybrid rotor. This design functions as a control mechanism to prevent the angular velocity of the inner Savonius rotor from exceeding a specified threshold. For the first time, this design integrates Darrieus and Savonius rotors on a common shaft, then with two distinct rotors mounted on separate shafts. These shafts are connected through a gearless control mechanism that regulates the angular velocity of the Savonius rotor, ensuring it operates below an angular velocity of 19.79 rad/s. The findings suggest that both single and dual shaft configurations can improve rotor power coefficient  by up to 72% and 90%, respectively, in comparison to conventional rotors at a TSR of 1.4
کلیدواژه‌ها
Self-starting capability
Single-shaft hybrid Darrieus-Savonius VAWT
Dual-shafthybrid Darrieus-Savonius VAWT
Gear mechanism
Vorticity field

موضوعات

عنوان مقاله English

Self-Starting Capability Improvement of Single and Dual Hybrid Darrieus-Savonius VAWTs, Incorporating a Gear Mechanism

نویسندگان English

Sina Hosseini Rad 1
Morteza Taraghi 2
Farzad Ghafoorian 1
Mahdi Moghimi 1
1 School of Mechanical Engineering, Iran university of science and technology
2 School of Mechanical Engineering, Iran university of science and technology
چکیده English

The substantial increase in greenhouse gas emissions has catalyzed the growth of renewable energy sources. In this context, vertical axis wind turbines (VAWTs) have gained significant traction due to their numerous advantages. Notably, Darrieus VAWTs have demonstrated acceptable efficiency; however, their reliance on initial torque and challenges associated with self-starting capabilities prompted advancements in hybrid Darrieus-Savonius VAWTs. This configuration has primarily proven effective in enhancing efficiency within a low-tip speed ratio (TSR) range. However, hybrid rotors tend to experience performance degradation in high-TSR ranges. To address the performance decline observed in the high-TSR range, this study proposes an innovative solution by developing a dual-shaft hybrid rotor. This design functions as a control mechanism to prevent the angular velocity of the inner Savonius rotor from exceeding a specified threshold. For the first time, this design integrates Darrieus and Savonius rotors on a common shaft, then with two distinct rotors mounted on separate shafts. These shafts are connected through a gearless control mechanism that regulates the angular velocity of the Savonius rotor, ensuring it operates below an angular velocity of 19.79 rad/s. The findings suggest that both single and dual shaft configurations can improve rotor power coefficient Cp by up to 72% and 90%, respectively, in comparison to conventional rotors at a TSR of 1.4.

کلیدواژه‌ها English

Self-starting capability
Single-shaft hybrid Darrieus-Savonius VAWT
Dual-shafthybrid Darrieus-Savonius VAWT
Gear mechanism
Vorticity field
[1]           M. Mehrpooya, M. Mohammadi, and E. Ahmadi, “Techno-economic-environmental study of hybrid power supply system: A case study in Iran,” Sustainable Energy Technologies and Assessments, vol. 25, pp. 1–10, Feb. 2018, doi: http://doi.org/10.1016/j.seta.2017.10.007.
[2]           H. Seifi Davari, M. Seify Davari, R. M. Botez, and H. Chowdhury, “Advancements in Vertical Axis Wind Turbine Technologies: A Comprehensive Review,” Arabian Journal for Science and Engineering, pp. 1–48, 2024.
[3]           A. G. Chitura, P. Mukumba, and N. Lethole, “Enhancing the Performance of Savonius Wind Turbines: A Review of Advances Using Multiple Parameters,” Energies, vol. 17, no. 15, 2024, doi: http://doi.org/10.3390/en17153708.
[4]           A. Rosato, A. Perrotta, and L. Maffei, “Commercial Small-Scale Horizontal and Vertical Wind Turbines: A Comprehensive Review of Geometry, Materials, Costs and Performance,” Energies, vol. 17, no. 13, p. 3125, 2024.
[5]           A. Tayebi and F. Torabi, “Flow control techniques to improve the aerodynamic performance of Darrieus vertical axis wind turbines: A critical review,” Journal of Wind Engineering and Industrial Aerodynamics, vol. 252, p. 105820, Sep. 2024, doi: http://doi.org/10.1016/j.jweia.2024.105820.
[6]           D. H. Seifi, S. Kouravand, and I. Khatami, “Improving the performance self-starting of the vertical axis wind turbine using porous blade,” 2020.
[7]           A. JALALI and M. ZAMANI, “Effect of blade angle of attack on the performance of the darius j-shaped vertical axial wind turbine,” 2020.
[8]           J. Pan, C. Ferreira, and A. Van Zuijlen, “Performance analysis of an idealized Darrieus–Savonius combined vertical axis wind turbine,” Wind Energy, vol. 27, no. 6, pp. 612–627, Jun. 2024, doi: http://doi.org/10.1002/we.2904.
[9]           A. Roshan, A. Sagharichi, and M. J. Maghrebi, “Nondimensional parameters’ effects on hybrid Darrieus–Savonius wind turbine performance,” Journal of Energy Resources Technology, vol. 142, no. 1, p. 011202, 2020.
[10]         A. M. Abdelsalam, “Performance study on a modified hybrid wind turbine with twisted Savonius blades,” Energy Conversion and Management, 2021.
[11]         A. Pallotta, D. Pietrogiacomi, and G. P. Romano, “HYBRI – A combined Savonius-Darrieus wind turbine: Performances and flow fields,” Energy, vol. 191, p. 116433, Jan. 2020, doi: http://doi.org/10.1016/j.energy.2019.116433.
[12]         T. Wakui, Y. Tanzawa, T. Hashizume, and T. Nagao, “Hybrid configuration of Darrieus and Savonius rotors for stand‐alone wind turbine‐generator systems,” Electrical Engineering in Japan, vol. 150, no. 4, pp. 13–22, 2005.
[13]         M. Raciti Castelli, A. Englaro, and E. Benini, “The Darrieus wind turbine: Proposal for a new performance prediction model based on CFD,” Energy, vol. 36, no. 8, pp. 4919–4934, Aug. 2011, doi: http://doi.org/10.1016/j.energy.2011.05.036.
[14]         F. Wenehenubun, “An Experimental Study on the Performance of Savonius Wind Turbines Related With The Number Of Blades,” Energy Procedia, p. 8, 2015.
[15]         A. M. Chowdhury, H. Akimoto, and Y. Hara, “Comparative CFD analysis of Vertical Axis Wind Turbine in upright and tilted configuration,” Renewable Energy, vol. 85, pp. 327–337, Jan. 2016, doi: http://doi.org/10.1016/j.renene.2015.06.037.
[16]         S. Chegini, M. Asadbeigi, F. Ghafoorian, and M. Mehrpooya, “An investigation into the self-starting of darrieus-savonius hybrid wind turbine and performance enhancement through innovative deflectors: A CFD approach,” Ocean Engineering, vol. 287, p. 115910, Nov. 2023, doi: http://doi.org/10.1016/j.oceaneng.2023.115910.
مهندسی مکانیک مدرس
دوره 25، شماره 9
شهریور 1404
صفحه 595-601