A review of the optimization studies for Savonius turbine considering hydrokinetic applications

Maldar, Nauman Riyaz; Ng, Cheng Yee; Oğuz, Elif

doi:10.1016/j.enconman.2020.113495

Cited by 48 publications

(24 citation statements)

References 142 publications

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“…Fig. 1 Top view of conventional Savonius rotor [9] Compared to the convex, the concave surface results in a higher drag coefficient which facilitates the rotation of the turbine. The high-strength blades give a greater starting torque to the turbine compared with low-solidity blades at the same force applied from the river [10].…”

Section: Introductionmentioning

confidence: 99%

A performance investigation of a multi-staging hydrokinetic turbine for river flow

Kunalan

Maldar

2022

PROGEE

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Our world has been relying on fossil fuel, a non-renewable energy that is depleting day by day and negatively impacting the environment. Hydropower is known to contribute a significant portion of the renewable power production. Dams has been the most common technique to generate hydropower. However, such scheme was not able to support the rural areas as it requires large areas and huge amount of water resource. Savonius hydrokinetic turbine (HKT) has been suggested as the device for a small-scale application as it can generate power from low-velocity river flow with less installation cost. With that, the aim of this study is designed to investigate and compare performance of the single-staged and two-staged HKT for river flow. This study considered numerical simulation that includes modelling, testing, and analyzing the data. Then, comparing it with the existing literature results, to identify the solution. This investigation demonstrates an improvement of 8.1% in the efficiency of power coefficient when compared with single-staged HKT.

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Section: Introductionmentioning

confidence: 99%

A performance investigation of a multi-staging hydrokinetic turbine for river flow

Kunalan

Maldar

2022

PROGEE

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“…Hydrokinetic turbines, have been applied on river, tidal and ocean currents [7]. As compared to other renewable sources like Onshore and Offshore wind, Solar, Biomass, and Geothermal, Hydropower has advantages on the energy density, predictability of power production, capacity factor, GHG emissions, visual impact and generation costs [8]. The use of non-conventional renewable technologies, including solar, wind, biomass and small hydropower can help to address the need to provide clean energy to remote locations [9,10], and to communities with access to a low-quality and expensive electricity [11].…”

Section: Introductionmentioning

confidence: 99%

DOE-ANOVA to Optimize Hydrokinetic Turbines for Low Velocity Conditions

Rueda-Bayona¹,

Paez²,

Eras³

et al. 2022

MMEP

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The need of reducing the dependence of fossil fuels and CO2 emissions have motivated the diversification of energy matrix. Among the Renewables, the hydropower shows better characteristics compared to solar, wind, biomass and geothermal, because its low CO2 emissions, higher density and others technical factors. Within the Hydropower, the Hydrokinetic turbines (HT) are considered as a promising technology because can provide electricity during low flow velocity conditions (< 2 m/s) and is able to operate in shallow waters < 8 m and in secluded areas without access to the energy network. In this sense, the present study incentivizes the research in Hydropower and proposes and new application of DOE-ANOVA combined with Computational Fluid Dynamics (CFD) modelling for the HT design and optimization. Accordingly, this work evaluated the performance of a HT with 1.9 m of rotor diameter operating in a water flow of 1.5 m/s through a 23 factorial design with 9 modelling cases (MC). The results showed that the increment of outlet diameters increased the downstream velocity and the hydrodynamic pressure over the HT, and the reduction of the blade tip edge distance generated an increment of the response of the HT hydraulic and mechanical properties.

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“…The SAVONIUS rotor type represents a simple constructive variant that can be achieved with low costs, characterized by lower power coefficient (CP) values compared to horizontal-axis rotor types [5][6][7][8]. By comparison, the horizontal-axis turbine's rotor reaches 45% CP values, and the DARRIEUS vertical-axis rotor type reaches CP values up to 35%, whereas the classical SAVONIUS rotor with a 15% CP is located far behind but can compensate with other features related to its simple construction, low production cost, independence of wind direction, as well as good starting torque at low wind velocity values [9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Review of Specific Performance Parameters of Vertical Wind Turbine Rotors Based on the SAVONIUS Type

2021

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Increasing energy demand and environmental regulations around the world provide an adequate framework for developing methods of obtaining energy from renewable sources. Wind force is a resource with a high potential through which green energy can be obtained with no negative impact on the environment. Different turbine typologies have been developed, which can convert the wind force into mechanical and electrical energy through turbine rotational motion. Starting from the classic vertical-axis SAVONIUS rotor model, other models have been designed, which, according to the numerical studies and experimental test results, show higher performance parameters in operation. Such models present specific rotor blade geometries to achieve better operational results in terms of shaft torque and generated power. There are multiple research results from numerical analysis on virtual models or experimental tests that use rotor models in different constructive configurations aiming to improve operation performance. These research activities are related to the rotor blade number, the aspect and overlap ratio values, the blade profile geometry modification, the use of end plates connected to the rotor blades, curtain mounting solutions for directing the air flow on the active blade alone, and rotor constructive variants with deformable blades during operation. Some of the results obtained from the mentioned research activities are shown in this review for special rotor configurations whose performance results in terms of torque or power values are compared to the classical SAVONIUS model.

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A review of the optimization studies for Savonius turbine considering hydrokinetic applications

Cited by 48 publications

References 142 publications

A performance investigation of a multi-staging hydrokinetic turbine for river flow

A performance investigation of a multi-staging hydrokinetic turbine for river flow

DOE-ANOVA to Optimize Hydrokinetic Turbines for Low Velocity Conditions

Review of Specific Performance Parameters of Vertical Wind Turbine Rotors Based on the SAVONIUS Type

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