Optimum-configuration studies and prototype design of a wind-energy-operated irrigation system

Modi, V. J.; Roth, N.J.; Fernando, M. S. U. K.

doi:10.1016/0167-6105(84)90050-3

Cited by 57 publications

(20 citation statements)

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“…1c) claimed to be one of the most efficient SSWT blade profiles [15] is also tested. Since long, Bach type blade profiles are among the interests of investigators for SSWTs [26][27][28]. Thus, a modified Bach type SSWT is selected from the recent investigations of Roy and Saha [28].…”

Section: Description Of Blade Profilesmentioning

confidence: 99%

“…In this aspect, some studies with modified blade shapes were attempted reporting encouraging results. This has brought a renewed interest among the researchers to pursue further and detailed assessment of the blade design [12,[26][27][28][29]. Thus, in order to boost the applicability of these turbines, a novel but simple SSWT is developed and tested in a low speed wind tunnel.…”

Section: Introductionmentioning

confidence: 99%

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Wind tunnel experiments of a newly developed two-bladed Savonius-style wind turbine

2015

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Section: Description Of Blade Profilesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Wind tunnel experiments of a newly developed two-bladed Savonius-style wind turbine

2015

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“…The maximum power coefficient reported by him was only 20%. Modi et al [8] reported a power coefficient of 0.22 for the rotor. Efficiency of wind rotor depends on the overlap ratio between the two buckets as well.…”

Section: Introductionmentioning

confidence: 98%

Comparative study of a three-bucket Savonius rotor with a combined three-bucket Savonius–three-bladed Darrieus rotor

2008

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The vertical axis wind turbines are simple in construction, self-starting, inexpensive and can accept wind from any direction without orientation. A combined Savonius-Darrieus type vertical axis wind rotor has got many advantages over individual Savonius or individual Darrieus wind rotor, such as better efficiency than Savonius rotor and high starting torque than Darrieus rotor. But works on the combined Savonius-Darrieus wind rotor are very scare. In view of the above, two types of models, one simple Savonius and the other combined Savonius-Darrieus wind rotors were designed and fabricated. The Savonius rotor was a three-bucket system having provisions for overlap variations. The Savonius-Darrieus rotor was a combination of three-bucket Savonius and three-bladed Darrieus rotors with the Savonius placed on top of the Darrieus rotor. The overlap variation was made in the upper part, i.e. the Savonius rotor only. These were tested in a subsonic wind tunnel available in the department. The various parameters namely, power coefficients and torque coefficients were calculated for both overlap and without overlap conditions. From the present investigation, it is seen that with the increase of overlap, the power coefficients start decreasing. The maximum power coefficient of 51% is obtained at no overlap condition. However, while comparing the power coefficients (C p ) for simple Savonius-rotor with that of the combined configuration of Savonius-Darrieus rotor, it is observed that there is a definite improvement in the power coefficient for the combined Savonius-Darrieus rotor without overlap condition. Combined rotor without overlap condition provided an efficiency of 0.51, which is higher than the efficiency of the Savonius rotor at any overlap positions under the same test conditions. r

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“…However, there are still few studies about the blade geometry. Modi et al study the blade geometry and aspect ratio, by an extensive wind-tunnel test program [12]. The Bach-type Savonius is studied by Tong et al to obtained better performance [13].…”

Section: Introductionmentioning

confidence: 99%

A Novel Parametric Modeling Method and Optimal Design for Savonius Wind Turbines

et al. 2017

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Abstract:Under the inspiration of polar coordinates, a novel parametric modeling and optimization method for Savonius wind turbines was proposed to obtain the highest power output, in which a quadratic polynomial curve was bent to describe a blade. Only two design parameters are needed for the shape-complicated blade. Therefore, this novel method reduces sampling scale. A series of transient simulations was run to get the optimal performance coefficient (power coefficient C p ) for different modified turbines based on computational fluid dynamics (CFD) method. Then, a global response surface model and a more precise local response surface model were created according to Kriging Method. These models defined the relationship between optimization objective C p and design parameters. Particle swarm optimization (PSO) algorithm was applied to find the optimal design based on these response surface models. Finally, the optimal Savonius blade shaped like a "hook" was obtained. C m (torque coefficient), C p and flow structure were compared for the optimal design and the classical design. The results demonstrate that the optimal Savonius turbine has excellent comprehensive performance. The power coefficient C p is significantly increased from 0.247 to 0.262 (6% higher). The weight of the optimal blade is reduced by 17.9%.

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Optimum-configuration studies and prototype design of a wind-energy-operated irrigation system

Cited by 57 publications

References 0 publications

Wind tunnel experiments of a newly developed two-bladed Savonius-style wind turbine

Wind tunnel experiments of a newly developed two-bladed Savonius-style wind turbine

Comparative study of a three-bucket Savonius rotor with a combined three-bucket Savonius–three-bladed Darrieus rotor

A Novel Parametric Modeling Method and Optimal Design for Savonius Wind Turbines

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