On the performance analysis of Savonius rotor with twisted blades

Saha, Ujjwal K.; Rajkumar, M. Jaya

doi:10.1016/j.renene.2005.08.030

Cited by 214 publications

(110 citation statements)

References 13 publications

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“…These low speed wind turbines must be analysed with di erent rotors, such as the Savonius rotors [19][20][21][22], and this should be done in depth in future papers.…”

Section: Resultsmentioning

confidence: 99%

Wind turbines design corrections for next Galicia climatic conditions

et al. 2017

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Abstract. Galicia, placed in northwest of Spain, is a clear example of global wind energy development as a consequence of its climate conditions. Despite this fact, previous research works have indicated a climate change in the next years that must be considered at the time of wind turbine design, selection, and placement. In this work, information about weather conditions and power output from twenty four wind turbines was sampled in a typical year, and a statistic study was done. Based on this information, a model that relates weather to power conversion in this particular region and wind turbines model was obtained. This particular procedure lets us de ne the e ect of climate change over wind power on Galician wind farms. Results showed a 10% power output fall during spring and summer seasons. Therefore, future studies about new technologies that work out well under those conditions, such as low wind turbines, must be done. At the same time, results can be employed for future wind turbines placement optimization. Finally, nowadays, there is no standard or procedure to consider this highly complex situation, and so the present work aims to be the initial guide.

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“…These low speed wind turbines must be analysed with di erent rotors, such as the Savonius rotors [19][20][21][22], and this should be done in depth in future papers.…”

Section: Resultsmentioning

confidence: 99%

Wind turbines design corrections for next Galicia climatic conditions

et al. 2017

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“…The blades assemble was carried out by holding the ends of each blade on the shaft, base and top of each blade with the same extremes of the other but in opposite directions (Fig. 2-c) [4], [5].…”

Section: Blade Designmentioning

confidence: 99%

Construction of a helical vertical axis wind turbine for electricity supply

Reza

Tolentino

Toledo-Velázquez

2015

Computer-Aided Design and Applications

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In an effort to find solutions for global energy crisis, an analysis on a helical vertical axis wind turbine was conducted with the consideration of renewables and energy efficiency. This study was carried out in two steps: the realization of the analytical calculation of a helical wind turbine power output which then informed the design and construction of the rotor blades. The project particularly aimed to address its use as the electricity supply for residential properties or any other places with less ideal economy conditions. The uncomplicated and highly accessible mechanism using basic materials is to give people to have a viable option on their own electricity production.

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“…Several geometry efficiency developments have been conducted in previous study. Some modification have been made on the shape of conventional savonius such as adjusting overlap ratio and aspect ratio (Sargolzaei and Kianifar (2007), Saha (2008)), use other type of drag based VAWT such as Helical shape and multi blade shape (Kamoji (2008), Saha (2005)) and add an external feature to improve wind capturing ability (Altan (2008)). …”

Section: Problem Statementmentioning

confidence: 99%

Simulation Study on the Performance of Vertical Axis Wind Turbine

Samiran

Wahab

Mohd

et al. 2013

AMM

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Nowadays, people start to think the Drag type of vertical axis wind turbine (VAWT) as a potential and reliable wind machine in the future. It advantageous of simpler and significantly cheap to build and maintain than conventional Horizontal axis wind turbine (HAWT) attract the world attention. However, such rotor is suffering from poor efficiency problems. The present study will consider the design improvement of Savonius rotor, which is the basic geometry of drag machine, as a critical step to increase the efficiency of output power. Investigation is conducted to study the effect of geometrical configuration on the performance of the rotor in terms of coefficient of ABSTRAKPada ketika ini, dunia mula menyedari kehadiran turbin angin paksi menegak jenis seretan sebagai mesin angin yang sangat berpotensi di masa akan datang. Kelebihannya yang mempunyai bentuk yang mudah dan sangat murah untuk dibina dan diselenggara berbanding turbin angin paksi mendatar yang konvensional menarik perhatian dunia.Walaubagaimanapun, pemutar sebegini mengalami masalah kecekapan. Kajian didalam tesis ini akan dijalankan untuk menambah baik rekabentuk pemutar jenis 'Savonius', dimana ia adalah geometri jenis seretan yang paling asas, sebagai langkah penting untuk meningkatkan kecekapan kuasa keluaran. Penyelidikan dijalanakan untuk mengkaji kesan perubahan geometri terhadap prestasi pemutar dari segi pekali torque, pekali kuasa dan kuasa keluaran.Terdapat tiga jenis penambahbaikan iaitu penambahan bilangan bilah, kaedah perisai, dan kombinasi kedua-duanya. Simulasi komputeran dinamik bendalir (CFD) dijalankan untuk menganalisis sifat aliran pada setiap jenis pemutar yang dikaji. Persamaan kesinambungan, Reynolds Averaged Navier-Stokes (RANS) dan gelora k-E epsilon realisasi diselesaikan dengan perisian Ansys-Fluent 14.0. Simulasi ini mengira tekanan, halaju dan daya yang bertindak keatas bilah pemutar. Paduan daya, tekanan dan pekali tork yang diperolehi akan digunakan untuk mengira pekali kuasa dan kuasa keluaran. Keputusan yang diperolehi dengan kaedah 'pengaruh masa' dan kaedah 'mantap' untuk pemutar Savonius dua bilah yang konvensional menghampiri keputusan yang diperolehi dengan kaedah eksperimen yang telah dijalankan oleh penulis terdahulu dan ia menunjukkan bahawa kaedah yang dijalankan adalah sesuai digunakan untuk analisis seperti ini. Penambahbaikan dengan pemutar 3 dan 4 bilah yang beroperasi dengan kaedah perisai gabungan memberikan pekali kuasa maksimum yang paling tinggi iaitu 0.37 pada TSR 0.5. CONTENTS

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On the performance analysis of Savonius rotor with twisted blades

Cited by 214 publications

References 13 publications

Wind turbines design corrections for next Galicia climatic conditions

Wind turbines design corrections for next Galicia climatic conditions

Construction of a helical vertical axis wind turbine for electricity supply

Simulation Study on the Performance of Vertical Axis Wind Turbine

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