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Using Free Flow Energy Cumulation in Wind and Hydro Power Production

Original scientific paper

Journal of Sustainable Development of Energy, Water and Environment Systems
Volume 4, Issue 3, September 2016, pp 279-292
DOI: https://doi.org/10.13044/j.sdewes.2016.04.0022
Victor Bashurin1, Igor Budnikov2, Vitaliy Khatunkin2, Vladimir Klevtsov2, Lev Ktitorov1 , Anna Lazareva1, Evgeny Meshkov2, Irina Novikova2, Fedor Pletenev1, Gennady Yanbaev2
1 ITC Sistema-Sarov, SarovTechnopark, Parkovaya Street 3, Satis, Diveevo District, Nizhny Novgorod 607328, Russian Federation
2 Sarov Institute of Physics and Technology, Dukhova Street 6, Sarov, Nizhny Novgorod 607186, Russian Federation


When approaching a conventional wind turbine, the air flow is slowed down and widened. This results in a loss of turbine efficiency. In order to exploit wind or water flow power as effectively as possible, it was suggested that the turbine should be placed inside a shroud, which consists of 4 wing-shaped surfaces. Two internal air foils improve the turbine performance by speeding up the flow acting on the turbine blades, two external wings create a field of low pressure behind the turbine, thus, helping to draw more mass flow to the turbine and avoid the loss of efficiency due to flow deceleration. The system accumulates kinetic energy of the flow in a small volume where the smaller (and therefore, cheaper) turbine can be installed. A smaller system can be installed inside the bigger one, which would help to accumulate even more kinetic energy on the turbine. This method implies kinetic energy summation with local flow redistribution. Both experiments and CFD simulations demonstrate a significant increase in velocity and generated mechanical power in comparison to those for a bare turbine.

Keywords: Hydropower, Wind power, Ducted (shrouded) turbine, Wind turbine, Flow booster, Power augmentation, Wind turbine efficiency.

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