Abstract




 
   

IJE TRANSACTIONS A: Basics Vol. 26, No. 1 (January 2013) 91-98   

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  EXPERIMENTAL STUDIES ON SAVONIUS-TYPE VERTICAL AXIS TURBINE FOR LOW MARINE CURRENT VELOCITY
 
O. Yaakob, D. Suprayogi, M. Abdul Ghani and K. Tawi
 
( Received: August 04, 2012 – Accepted: November 15, 2012 )
 
 

Abstract    Renewable energy resources need to be explored to maintain and meet energy demand and replace the slowly depleting fossil fuels. Malaysia, surrounded by sea with long coastlines, is poised to exploit the potential of this energy. This research work aims at designing a suitable device to extract energy from Malaysian sea current. Malaysia’s ocean has a low current velocity averaging 0.56 m/s, which is below the working velocity of presently available current energy devices. To overcome this velocity limitation, a Savonius-type Vertical Axis Marine Current Turbine (VAMCT) design was proposed. The experiment to measure the torque of a Savonius-type turbine, which hitherto has been used for wind energy application, is presented in this paper. The laboratory experiment was carried out in the towing tank facility in Marine Technology Laboratory at Universiti Teknologi Malaysia. The Savonius model was attached to the towing carriage and current flow was simulated by moving the carriage in still water. The results show that turbine with double stacking rotors each with two paddles and overlap ratio of 0.21 give the best performance.

 

Keywords    ocean energy, renewable energy, marine current energy

 

چکیده    جهت پاسخگویی به تقاضای روزافزون انرژی، لازم است منابع انرژی تجدید پذیر کشف و جایگزین سوخت های فسیلیِ درحال پایان گردد. مالزی، با سواحل طولانی، آمادگی دارد از این منابع انرژی بهره برداری کند. هدف از این کار تحقیقاتی، طراحی یک دستگاه مناسب برای استخراج انرژی از جریان های دریایی می باشد. سرعت جریان آب دردریاهای اطراف مالزی بطور متوسط 0.56 متربرثانیه بوده و کمتر ازسرعت مورد نیاز برای کار دستگاه های موجود میباشد. برای غلبه بر این محدودیت سرعت، توربین محورقائم دریایی (VAMCT) از نوع Savonius ارائه شده است. آزمایش اندازه گیری گشتاورروی توربین مذکور، که تا کنون برای انرژی باد استفاده می شده است ، در این مقاله ارائه شده است. انجام تستهای آزمایشگاهی در حوضچه کشش دانشگاه صنعتی مالزی (Universiti Teknologi Malaysia) صورت گرفته است. مدل توربین به سیستم یدک (Carriage) وصل وجهت شبیه سازی جریان، درآب آرام کشیده شده است. نتایج نشان داده است که توربینهای حاوی دو روتورکه روی هرکدام ازآنها دو پدال وجود داشته و نسبت همپوشانی آنها 0.21 میباشد، عملکرد بهتری دارند.

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