The conventional Savonius turbine is one of the most used rotors to convert the kinetic energy of natural water resources instead of potential energy. However, this rotor presents low efficiency. A twisted Savonius turbine was appeared which is considered most performant by twisting the blades of the conventional Savonius turbine along theirs spans. In fact, various experimental and numerical investigations were carried out to enhance the efficiency of the twisted Savonius turbine which has not been completely explored. In this study, an experimental investigation was carried out to assess the performance characteristics of a twisted Savonius turbine in an irrigation canal. In order to improve the efficiency of the Savonius turbine, three deflector designs were investigated numerically based on a CFD 3D numerical model. The peak value of the turbine power coefficient reaches 0.166 at a tip-speed ratio value of 0.78 without using a deflector upstream the turbine. Using the deflector design showing the highest efficiency, the peak value of the power coefficient was increased by 17.47%. The use of the proposed deflector is expected to provide toward a more effective employment of flowing water like tidal currents, river streams or other man-made water channels for electrical energy production in rural regions.

Mabrouk Mosbahi, Sana Elgasri, Mariem Lajnef, Bouzid Mosbahi, Zied Driss (2020). Performance enhancement of a twisted Savonius hydrokinetic turbine with an upstream deflector. INTERNATIONAL JOURNAL OF GREEN ENERGY, 18(1), 51-65 [10.1080/15435075.2020.1825444].

Performance enhancement of a twisted Savonius hydrokinetic turbine with an upstream deflector

Mabrouk Mosbahi
;
Zied Driss
2020-09-29

Abstract

The conventional Savonius turbine is one of the most used rotors to convert the kinetic energy of natural water resources instead of potential energy. However, this rotor presents low efficiency. A twisted Savonius turbine was appeared which is considered most performant by twisting the blades of the conventional Savonius turbine along theirs spans. In fact, various experimental and numerical investigations were carried out to enhance the efficiency of the twisted Savonius turbine which has not been completely explored. In this study, an experimental investigation was carried out to assess the performance characteristics of a twisted Savonius turbine in an irrigation canal. In order to improve the efficiency of the Savonius turbine, three deflector designs were investigated numerically based on a CFD 3D numerical model. The peak value of the turbine power coefficient reaches 0.166 at a tip-speed ratio value of 0.78 without using a deflector upstream the turbine. Using the deflector design showing the highest efficiency, the peak value of the power coefficient was increased by 17.47%. The use of the proposed deflector is expected to provide toward a more effective employment of flowing water like tidal currents, river streams or other man-made water channels for electrical energy production in rural regions.
29-set-2020
Mabrouk Mosbahi, Sana Elgasri, Mariem Lajnef, Bouzid Mosbahi, Zied Driss (2020). Performance enhancement of a twisted Savonius hydrokinetic turbine with an upstream deflector. INTERNATIONAL JOURNAL OF GREEN ENERGY, 18(1), 51-65 [10.1080/15435075.2020.1825444].
File in questo prodotto:
File Dimensione Formato  
Performance+enhancement+of+a+twisted+Savonius+hydrokinetic+turbine+with+an+upstream+deflector-compresso.pdf

Solo gestori archvio

Tipologia: Versione Editoriale
Dimensione 2.02 MB
Formato Adobe PDF
2.02 MB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10447/618963
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 28
  • ???jsp.display-item.citation.isi??? 26
social impact