Istrazivanja i projektovanja za privreduJournal of Applied Engineering Science


DOI: 10.5937/jaes0-33297 
This is an open access article distributed under the CC BY 4.0
Creative Commons License

Volume 20 article 944 pages: 386-394

Danar Susilo Wijayanto*
Postgraduate Program, Yogyakarta State University, Jl. Colombo No.1 Yogyakarta, 55281, Indonesia; Mechanical Engineering Education, Faculty of Teacher Training and Education, Universitas Sebelas Maret, Jl. Ir. Sutami No.36 Surakarta, 57126, Indonesia

Postgraduate Program, Yogyakarta State University, Jl. Colombo No.1 Yogyakarta, 55281, Indonesia

Mochammad Bruri Triyono
Postgraduate Program, Yogyakarta State University, Jl. Colombo No.1 Yogyakarta, 55281, Indonesia

Husni Ibadi
Mechanical Engineering Education, Faculty of Teacher Training and Education, Universitas Sebelas Maret, Jl. Ir. Sutami No.36 Surakarta, 57126, Indonesia

Wind generation is an alternative to energy generation that is renewable, widely distributed, and environmentally friendly. However, the use of wind energy in certain areas with limited land has constraints for installing large-scale generators; therefore, the concept of micro wind energy generation is an attractive solution to be developed at this time. In this case, the Vertical Axis Wind Turbine (VAWT) is preferred because it is reliable and economically feasible to operate at low wind speeds in all wind directions. In the case of turbine selection, the Savonius turbine is preferred because it has self-starting. Still, in terms of performance, the Darrieus turbine type has better power efficiency than the Savonius type. Besides that, because of their high solidity and heavier weight, drag-based turbines are less preferred. In this study, the combination of the two types of turbines between Savonius and Darrieus was carried out to overcome each type of turbine's shortcomings. In this case, the fiberglass material was chosen because it has reliable properties that increase the turbine's efficiency. The research design used an experimental method by configuring a double-stage Savonius-Darrieus turbine in the wind tunnel. The data was collected by measuring and recording the electric voltage, electric current, and the generator shaft rotation for each variation of the pitch angle at the 0°,5°,10°,15°,20°,25° and 30° blades and with wind speeds at 1.5 m/s up to 5 m/s with 0.1 m/s intervals. The results showed that adding variations in the pitch angle of the Savonius-Darrieus double-stage turbine blade was ineffective because it reduced the electric power generated and the turbine's performance. In this study, the resulting cut-in speed is 3.8 m/s. However, with the addition of variations in the pitch angle, there was a decrease in the value of electric power, power coefficient, and Tip Speed Ratio (TSR), where the maximum values were 3.14 W, 0.24, and 0.75, respectively.

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This research is partially funded by Universitas Sebelas Maret Surakarta under program doctoral thesis research with contract number 451/UN.27.21/TU/2020.

1. IEA. Global Energy Review 2020, from:, accessed on 2020-11-07.

2. Zhiqiang, L., Yunke, W., Jie, H., Zhihong, Z,. Wenqi, C. (2018). The study on performance and aerodynamics of micro counter-rotating HAWT. Energi, vol. 161, 15 October 2018, 939–954, DOI: 10.1016/

3. Stathopoulos, T., Alrawashdeh, H., Al-quraan, A., Blocken, B., Dilimulati, A., Paraschivoiu, M., et al. (2018). Urban wind energy: Some views on potential and challenges. Journal of Wind Engineering and Industrial Aerodynamics, vol. 179, August 2018, 146–157, DOI: 10.1016/j.jweia.2018.05.018

4. Yang, H., Chen, J., Pang, X., Chen, G. (2019). A new aero-structural optimization method for wind turbine blades used in low wind speed areas. Composite Structures, vol. 207 1 January 2019, 446–459, DOI: 10.1016/j.compstruct.2018.09.050

5. Hernández CV, Telsnig T, Pradas AV. (2017). JRC Wind Energy Status Report 2016 Edition. JRC Science for Policy Report. EUR 28530 EN. Luxembourg: Publications Office of the European Union; 2017. JRC105720, DOI: 10.2760/332535. Available from:

6. Tasneem, Z., Al Noman, A., Das, SK., Saha, DK., Islam, MR., Ali, F., et al. (2020). An analytical review on the evaluation of wind resource and wind turbine for urban application: prospect and challenges. Development in the Built Environment, vol. 4, November 2020, 1-15, DOI: 10.1016/j.dibe.2020.100033

7. Ge, M., Zhang, S., Meng, H., Ma, H. (2020). Study on interaction between the wind-turbine wake and the urban district model by large eddy simulation. Renewable Energy, vol. 157, September 2020, 941-950, DOI: 10.1016/j.renene.2020.04.134

8. Longo, R., Nicastro, P., Natalini, M., Schito, P., Mereu, R., Parente, A. (2020). Impact of urban environment on Savonius wind turbine performance: A numerical perspective. Renewable Energy, vol. 156, August 2020, 407-422, DOI: 10.1016/j.renene.2020.03.101

9. Li, X., Zhang, L., Song, J., Bian, F., Yang, K. (2020). Airfoil design for large horizontal axis wind turbines in low wind speed regions. Renewable Energy, vol. 145, January 2020, 2345-2357, DOI: 10.1016/j.renene.2019.07.163

10. Pourrajabian, A., Ebrahimi, R., Mirzaei, M. (2014). Applying micro scales of horizontal axis wind turbines for operation in low wind speed regions. Energy Conversion and Management, vol. 87, November 2014, 119-127, DOI: 10.1016/j.enconman.2014.07.003

11. Akour, SN., Al-Heymari, M., Ahmed, T., Khalil, KA. (2018). Experimental and theoretical investigation of micro wind turbine for low wind speed regions. Renewable Energy, vol. 116, Part A, February 2018, 215-223, DOI: 10.1016/j.renene.2017.09.076

12. Hand, B., Cashman, A. (2020). A review on the historical development of the lift-type vertical axis wind turbine: From onshore to off shore floating application. Sustainable Energy Technologies and Assessments, vol. 38, April 2020, 1-11, DOI: 10.1016/j.seta.2020.100646

13. Vergaerde, A., De Troyer, T., Carbo, Molina A., Standaert, L., Runacres, MC. (2019). Design, manufacturing and validation of a vertical-axis wind turbine set-up for wind tunnel tests. Journal of Wind Engineering and Industrial Aerodynamics, vol. 193, October 2019, 1-12, DOI: 10.1016/j.jweia.2019.103949

14. Korprasertsak, N., Leephakpreeda, T. (2016). Analysis and optimal design of wind boosters for Vertical Axis Wind Turbines at low wind speed. Journal of Wind Engineering and Industrial Aerodynamics, vol. 159, December 2016, 9-18, DOI: 10.1016/j.jweia.2016.10.007

15. Abdalrahman, G., Melek, W., Lien, FS. (2017). Pitch angle control for a small-scale Darrieus vertical axis wind turbine with straight blades (H-Type VAWT). Renewable Energy, vol. 114, Part B, December 2017, 1353-1362, DOI: 10.1016/j.renene.2017.07.068

16. Sengupta, AR., Biswas, A., Gupta, R. (2019). Comparison of low wind speed aerodynamics of unsymmetrical blade H-Darrieus rotors-blade camber and curvature signatures for performance improvement. Renewable Energy, vol. 139, August 2019, 1412-1427, DOI: 10.1016/j.renene.2019.03.054

17. Saad, AS., El-Sharkawy, II., Ookawara, S., Ahmed, M. (2020). Performance enhancement of twisted-bladed Savonius vertical axis wind turbines. Energy onversion and Management, vol. 209, 1 April 2020, 1-19, DOI: 10.1016/j.enconman.2020.112673

18. Chan, CM., Bai, HL., He, DQ. (2018). Blade shape optimization of the Savonius wind turbine using a genetic algorithm. Applied Energy, vol. 213, 1 March 2018, 148-157, DOI: 10.1016/j.apenergy.2018.01.029

19. Liu, J., Lin, H., Zhang, J. (2019). Review on the technical perspectives and commercial viability of vertical axis wind turbines. Ocean Engineering, vol. 182, 15 June 2019, 608-626, DOI: 10.1016/j.oceaneng.2019.04.086

20. Wenehenubun, F., Saputra, A., Sutanto, H. (2015). An experimental study on the performance of Savonius wind turbines related with the number of blades. Energy Procedia, vol. 68, April 2015, 297-304, DOI: 10.1016/j.egypro.2015.03.259

21. Mohamed, MH., Dessoky, A., Alqurashi, F. (2019). Blade shape effect on the behavior of the H-rotor Darrieus wind turbine: Performance investigation and force analysis. Energy, vol. 179, 15 July 2019, 1217-1234, DOI: 10.1016/

22. Bel, Mabrouk I., El Hami, A. (2019). Effect of number of blades on the dynamic behavior of a Darrieus turbine geared transmission system. Mechanical Systems and Signal Processing, vol. 121, 15 April 2019, 562-578, DOI: 10.1016/j.ymssp.2018.11.048

23. Zamani, M., Maghrebi, MJ., Varedi, SR. (2016). Starting torque improvement using J-shaped straight-bladed Darrieus vertical axis wind turbine by means of numerical simulation. Renewable Energy, vol. 95, September 2016, 109-126, DOI: 10.1016/j.renene.2016.03.069

24. Alom, N., Saha, UK. (2019). Influence of blade profiles on Savonius rotor performance: Numerical simulation and experimental validation. Energy Conversion and Management, vol. 186, 15 April 2019, 267-277, DOI: 10.1016/j.enconman.2019.02.058

25. Al-Gburi, KAH., Alnaimi, FBI., Al-quraishi, BA., Sann, Tan E., Maseer, MM. (2021). A comparative study review: The performance of Savonius-type rotors. Materials Today: Proceedings 2021, p. 1-7, DOI: 10.1016/j.matpr.2021.09.226

26. Menet, JL. (2004). A double-step Savonius rotor for local production of electricity: a design study. Renewable Energy, vol. 29, Issue 11, September 2004, 1843-1862, DOI: 10.1016/j.renene.2004.02.011

27. Dabachi, MA., Rahmouni, A., Rusu, E., Bouksour, O. (2020). Aerodynamic simulations for floating darrieus-type wind turbines with three-stage rotors. Inventions, vol. 5, no. 2, 1-18, DOI: 10.3390/inventions5020018

28. Pallotta, A., Pietrogiacomi, D., Romano, GP. (2020). HYBRID – A combined Savonius-Darrieus wind turbine: Performances and flow fields. Energy, vol. 191, 15 January 2020, 1-15, DOI: 10.1016/

29. Ansal, Muhammed K., Ramesh, Kannan C., Stalin, B., Ravichandran, M. (2020). Experimental investigation on AW 106 Epoxy/E-Glass fiber/nano clay composite for wind turbine blade. Materials Today: Proceedings 2020, vol. 21, Part 1, p. 202-205, DOI: 10.1016/j.matpr.2019.04.221

30. Mangestiyono, W., Setyoko, B., Tadeus, DY., Yuniarto. (2019). Mechanical strength of 10 kW wind turbine blade utilizes glass fiber reinforced plastic. Materials Today: Proceedings 2019, vol. 13, Part 1, p. 71-75, DOI: 10.1016/j.matpr.2019.03.190

31. Mantravadi, B., Unnikrishnan, D., Sriram, K., Mohammad, A., Vaitla, L., Velamati, RK. (2019). Effect of solidity and airfoil on the performance of vertical axis wind turbine under fluctuating wind conditions. International Journal of Green Energy, vol. 16, issue 14, 1-14, DOI: 10.1080/15435075.2019.1671408

32. Subramanian, A., Yogesh, SA., Sivanandan, H., Giri, A., Vasudevan, M., Mugundhan, V, et al. (2017). Effect of airfoil and solidity on performance of small-scale vertical axis wind turbine using three dimensional CFD model. Energy, vol. 133, 15 August 2017, 179-190, DOI: 10.1016/

33. Rahayu, S., Siahaan, M. (2018). The Characteristics of Raw Material Bqtn-Ex 157 Epoxy Resin Used as Composites Matrix. Jurnal Teknologi Dirgantara, vol. 15, no. 2, 151-160, DOI: 10.30536/j.jtd.2017.v0.a2526

34. Sathishkumar, TP., Satheeshkumar, S., Naveen, J. (2014). Glass fiber-reinforced polymer composites - A review. Journal of Reinforced Plastics and Composites, vol. 33, no. 13, 1258–1275, DOI:

35. Tjahjana, DDDP., Arifin, Z., Suyitno, S., Juwana, WE., Prabowo, AR., Harsito, C. (2021). Experimental study of the effect of slotted blades on the Savonius wind turbine performance. Theoretical and Applied Mechanics Letters, vol. 11, issue 3, 1-10, DOI: 10.1016/j.taml.2021.100249

36. Pamungkas, SF., Wijayanto, DS., Saputro, H., Widiastuti, I. (2018). Performance “S” type Savonius wind turbine with variation of fin addition on blade. In: IOP Conference Series: Materials Science and Engineering, vol. 288, p. 1-7, DOI: 10.1088/1757-899X/288/1/012132

37. Fertahi SD, Bouhal, T., Rajad, O., Kousksou, T., Arid, A., El Rhafiki, T, et al. (2018). CFD performance enhancement of a low cut-in speed current Vertical Tidal Turbine through the nested hybridization of Savonius and Darrieus. Energy Conversion and Management, vol. 169, 1 August 2018, 266-278, DOI: 10.1016/j.enconman.2018.05.027