A review of hydrokinetic turbines and enhancement techniques for canal installations: Technology, applicability and potential

Niebuhr, Chantel Monica; Dijk, Marco Van; Neary, Vincent S.; Bhagwan, Jay

doi:10.1016/j.rser.2019.06.047

Cited by 64 publications

(34 citation statements)

References 38 publications

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“…It has widespread application in many fields, such as water conservancy, petrochemical, seawater desalination, and mechanical power. It also has a positive effect on reducing energy consumption per unit of output [2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Performance Characteristics in Runner of an Impulse Water Turbine with Splitter Blade

et al. 2021

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The impulse water turbine is a promising energy conversion device that can be used as mechanical power or a micro hydro generator, and its application can effectively ease the current energy crisis. This paper aims to clarify the mechanism of liquid acting on runner blades, the hydraulic performance, and energy conversion characteristics in the runner domain of an impulse water turbine with a splitter blade by using experimental tests and numerical simulations. The runner was divided into seven areas along the flow direction, and the power variation in the runner domain was analyzed to reflect its energy conversion characteristics. The obtained results indicate that the critical area of the runner for doing the work is in the front half of the blades, while the rear area of the blades does relatively little work and even consumes the mechanical energy of the runner to produce negative work. The high energy area is concentrated in the flow passage facing the nozzle. The energy is gradually evenly distributed from the runner inlet to the runner outlet, and the negative energy caused by flow separation with high probability is gradually reduced. The clarification of the energy conversion performance is of great significance to improve the design of impulse water turbines.

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Section: Introductionmentioning

confidence: 99%

Performance Characteristics in Runner of an Impulse Water Turbine with Splitter Blade

et al. 2021

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“…Hydrokinetic systems (HKs) are a class of zero-head hydropower systems by which the energy is extracted from the kinetic energy of river, tidal, and ocean currents in contrast to the potential energy associated with falling water [8][9][10][11][12]. HKs produce electricity for 24 h a day, as long as the running water is available, with minimal costs associated with the produced energy and minimal or mitigatable environmental impact in comparison with the large hydroelectric power plants [13,14].…”

Section: Introductionmentioning

confidence: 99%

“…HKs produce electricity for 24 h a day, as long as the running water is available, with minimal costs associated with the produced energy and minimal or mitigatable environmental impact in comparison with the large hydroelectric power plants [13,14]. The methodologies used for the design and analysis of HKs are similar to those ones utilized for wind turbines, which take advantage of the wind kinetic energy [8][9][10][11][12]. The turbine employed can be characterized by its rotational-axis orientation (i.e., horizontal-and vertical-axis turbines) with respect to the water flow direction.…”

Section: Introductionmentioning

confidence: 99%

“…Currently, there are several hydrokinetic technologies under development [8][9][10][11][12]. A number of researchers have carried out several studies focused on various aspects of the technoeconomic feasibility, design optimization, reliability, and location of the turbine [13][14][15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

“…A number of researchers have carried out several studies focused on various aspects of the technoeconomic feasibility, design optimization, reliability, and location of the turbine [13][14][15][16][17][18][19][20]. Additionally, the augmentation application, anchoring, and environmental monitoring have been studied [10][11][12]. With respect to the design optimization, efforts have generally focused on the maximization of the power coefficient; i.e., on the maximization of the fraction of power in water that can be extracted by the hydrokinetic turbine.…”

Section: Introductionmentioning

confidence: 99%

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Design and Optimization of a Multi-Element Hydrofoil for a Horizontal-Axis Hydrokinetic Turbine

et al. 2019

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Hydrokinetic turbines are devices that harness the power from moving water of rivers, canals, and artificial currents without the construction of a dam. The design optimization of the rotor is the most important stage to maximize the power production. The rotor is designed to convert the kinetic energy of the water current into mechanical rotation energy, which is subsequently converted into electrical energy by an electric generator. The rotor blades are critical components that have a large impact on the performance of the turbine. These elements are designed from traditional hydrodynamic profiles (hydrofoils), to directly interact with the water current. Operational effectiveness of the hydrokinetic turbines depends on their performance, which is measured by using the ratio between the lift coefficient (CL) and the drag coefficient (CD) of the selected hydrofoil. High lift forces at low flow rates are required in the design of the blades; therefore, the use of multi-element hydrofoils is commonly regarded as an adequate solution to achieve this goal. In this study, 2D CFD simulations and multi-objective optimization methodology based on surrogate modelling were conducted to design an appropriate multi-element hydrofoil to be used in a horizontal-axis hydrokinetic turbine. The Eppler 420 hydrofoil was utilized for the design of the multi-element hydrofoil composed of a main element and a flap. The multi-element design selected as the optimal one had a gap of 2.825% of the chord length (C1), an overlap of 8.52 %C1, a flap deflection angle (δ) of 19.765°, a flap chord length (C2) of 42.471 %C1, and an angle of attack (α) of –4°.

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Modeling and Analysis of Autonomous Hybrid Green Microgrid System for the Electrification of Rural Area

Sharma¹,

Sood²,

Maheshwari³

et al. 2022

Renewable Energy Systems

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A review of hydrokinetic turbines and enhancement techniques for canal installations: Technology, applicability and potential

Cited by 64 publications

References 38 publications

Performance Characteristics in Runner of an Impulse Water Turbine with Splitter Blade

Performance Characteristics in Runner of an Impulse Water Turbine with Splitter Blade

Design and Optimization of a Multi-Element Hydrofoil for a Horizontal-Axis Hydrokinetic Turbine

Modeling and Analysis of Autonomous Hybrid Green Microgrid System for the Electrification of Rural Area

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