Experimental Investigation on the Influence of Overlap Ratio on Savonius Turbines Performance

Tania Rus, Lucian Florin Rus, Dana Adriana Ilutiu-Varvara, Roxana Mare, Ancuta Abrudan, Florin Domnita

Abstract


The paper presents an experimental investigation regarding the influence of the overlap ratio of blades of Savonius wind turbine over its power coefficient and power. Four Savonius wind turbines were fabricated with the overlap ratio of blades of 0.15, 0.20, 0.25 and 0.30. The turbines were subjected to an airflow directed through an opened subsonic wind tunnel. With the obtained results were determined, for each rotor, the variation equations of the rotations per minute depending on wind speed. Afterward, the function type and model of power variation curves depending on wind speed were determined. Following tests, it can be concluded that for wind speeds less than 4 m/s is suitable to be used the Savonius turbine with the overlap ratio of 0.15, while for wind speed that exceeds 4 m/s or areas where the wind has a turbulent character, the Savonius turbine with the overlap ratio of 0.30 is recommended.

Keywords


Wind energy, Savonius turbine, overlap ratio, tip speed ratio, power coefficient, power

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References


Vaughn, N., Wind Energy: Renewable Energy and the Environment, CRC Press, Taylor & Francis Group, USA, 2009; (Book)

Erich H., Wind Turbines: Fundamentals, Technologies, Application and Economics, Springer-Verlag Press, Berlin, Germany, 2006; (Book)

Jha A.R., Wind Turbine Technology, CRC Press, Taylor & Francis Group, USA, 2010; (Book)

Hansen M.O.L., Aerodynamics of Wind Turbines, Earthscan Press, USA, 2008; (Book)

Savonius S.J., The S-rotor and its applications, Mechanical Engineering, 53, 5, 1931; (Article)

Pope K., Naterer G.F., Dincer I. et al., 2011, Power correlation for vertical axis wind turbines with varying geometries, International Journal Of Energy Research, 35, 2011, pp 423–435; (Article)

Nasef M.H., El-Askary W.A., Abdel-Hamid A.A., et al., Evaluation of Savonius rotor performance: Static and dynamic studies, Journal of Wind Engineering and Industrial Aerodynamics, 123, 2013, pp 1–11; (Article)

Joao Vicente Akwa, Horacio Antonio Vielmo, Adriane Prisco Petry, A review on the performance of Savonius wind turbines, Renewable and Sustainable Energy Reviews 16, 2012, pp 3054– 3064; (Article)

Saha U.K., Thotla S., Maity D., Optimum design configuration of Savonius rotor through wind tunnel experiments, Journal of Wind Engineering and Industrial Aerodynamics, 96, 2008, pp 1359– 1375; (Article)

Rogowski K., Maroński R., CFD computation of the savonius rotor, Journal Of Theoretical And Applied Mechanics, 53, 1, 2015, pp 37-45; (Article)

Akwa J.V., Alves Da Silva Júnior G., Petry A.P., Discussion on the verification of the overlap ratio influence on performance coefficients of a Savonius wind rotor using computational fluid dynamics, Renewable Energy, 38, 2012, pp 141-149; (Article)

Patel V., Bhat G., Eldho T. I. et al., Influence of overlap ratio and aspect ratio on the performance of Savonius hydrokinetic turbine, International Journal Of Energy Research, 2016; (Article)

Kamoji M. A., Kedare S.B., Prabhu S.V., Experimental investigations on single stage, two stage and three stage conventional Savonius rotor, International Journal Of Energy Research, 32, 2008, pp 877–895; (Article)

Thiyagaraj J., Rahamathullah I., Suresh Prabu P., Experimental Investigations on the Performance Characteristics of a Modified Four Bladed Savonius Hydro-Kinetic Turbine, International Journal of Renewable Energy Research, Vol.6, No.4, 2016, pp 1530-1536 (Article)

Castañeda Ceballos Y., Cardona Valencia M., Hincapie Zuluaga D., Sierra Del Rio J., Vélez García S., Influence of the Number of Blades in the Power Generated by a Michell Banki Turbine, International Journal of Renewable Energy Research, Vol.7, No.4, 2017, pp 1989-1997 (Article)

Rus L.F., Experimental study on the increase of the efficiency of vertical axis wind turbines by equipping them with wind concentrators, Journal of Sustainable Energy, Vol 3., No.1, March 2012, pp 30-35; (Article)

Alaimo A., Esposito A., Milazzo A., et al., Slotted Blades Savonius Wind Turbine Analysis by CFD, Energies, 6, 2013, pp 6335-6351; (Article)

Mussell D. – Build your own wind turbine, The Pembina Institute – Sustainable Energy Solution, Ontario, 2006; (Book)

Al-Bahadly I. – Building a wind turbine for a rural home, Energy for Sustainable Development, 13, 2009, pg 159-165; (Article)

Rus T., Rus L.F., Abrudan A., et al., Experimental Tests in Equipping Vertical Axis Wind Turbines With Electric Generator, International Journal Of Renewable Energy Research, Vol.6, No.2, 2016, pp 465-471; (Article)

Mukund P. R., Wind and Solar Power Systems, U.S. Merchant Marine Academy Kings Point Press, New York, USA, 2000; (Book)

Devashish, Thaku A., A Comprehesive Review on Wind Energy System for Electric Power Generation: Current Situation And Improved Technologies to Realize Future Development, International Journal of Renewable Energy Research, Vol.7, No.4, 2017, pp 1786-1805 (Article)




DOI (PDF): https://doi.org/10.20508/ijrer.v8i3.7764.g7480

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