Study of Hydrokinetic Turbine Shrouds

Dancă, Paul; Bunea, Florentina; Nicolaie, Sergiu; Nedelcu, Adrian; Tanase, Nicolae; Babutanu, Corina Alice

doi:10.1109/ciem52821.2021.9614929

Cited by 6 publications

(6 citation statements)

References 6 publications

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“…In [9] characterization of a reduced scale of hydro turbine model is presented. [10] investigates the flow characteristics for two hydrokinetic turbine shrouds with different hydrofoil type cross-sections, and the same reference diameters.…”

Section: Introductionmentioning

confidence: 99%

Experimental Research on a Kinetic Hydro Turbine - Generator Assembly

et al. 2023

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The present paper is part of a larger project whose purpose is to develop a new hydrokinetic turbine-generator assembly, suitable for very low head water courses. It presents the experimental results of a turbine–generator physical model, installed on the tailrace of Mihailesti Hydropower Plant. In order to carry out the measurements, a floating structure and an anchoring system was installed on the power plant tailrace. This system also allowed the translation of the assembly between the two shores. A first set of measurements followed the water velocity and depth in the channel at various load values of the hydropower plant units, in order to determine the proper conditions for testing the model. The turbine gives the possibility of blades adjustment at three different angles, 0, 9 and 14 degrees respectively. Therefore, a set of measurements has been performed for each position of the blades. The measured parameters were the electric parameters of the generator such as voltage, current and the power variation with rotation speed. For the blades adjustment of 9 degrees and 1.76 m/s water velocity, the generator reached its maximum power of 500 W. The results retrieved will be used for the optimization and design of a new enlarged scale turbine–generator assembly. They will also be used as input data for the numerical modeling of the generator. Also, the exact knowledge of the channel geometry and flow parameters is valuable in studies preceding testing a prototype in the site.

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Section: Introductionmentioning

confidence: 99%

Experimental Research on a Kinetic Hydro Turbine - Generator Assembly

et al. 2023

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“…Therefore, the problem of increasing the conversion efficiency of kinetic energy still remains a current topic, under the attention of researchers in order to increase their physical and economic feasibility [5][6]. Classic solutions are constantly improved and in parallel, new solutions are developed worldwide that offer higher yields [7][8][9]. In [10] an experimental model of the hydrokinetic turbine is presented and many flow velocities and rotational speeds were investigated to characterize the turbine efficiency.…”

Section: Introductionmentioning

confidence: 99%

Analytical Model and Numerical Finite Element Model for a Submersible Synchronous Hydrogenerator

Dumitru¹,

Bunea²,

Nedelcu³

et al. 2023

J. Sci. Arts

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The main objective of the paper is to demonstrate the functionality and reliability of a hydrokinetic turbine system – a submersible electric generator, suitable for very low watercourses. To achieve this goal, it is necessary to design and build a prototype of a hydrokinetic turbine, coupled with an electric generator with excitation made with permanent magnets. This paper presents an analytical model and a finite element numerical model for estimating the electrical parameters of the generator (voltage, current, power, etc.). The two models were compared, and the results were extrapolated, in the analytical model, for several speed values.

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“…The findings from this paper are useful in a larger research project which has the purpose to achieve a new hydrokinetic turbine. All the boundary conditions used in the numerical model were previously obtained from experimental measurements, the results of these measurements being available already in the literature [6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Flow Induced by Different Shrouds Geometries

et al. 2023

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Energy consumption continues to rise due to the increase in the quality of human life. On the other hand, production of these energies must be done with the smaller impact on the environment as possible. All these facts are challenging engineers and researchers from this domain to develop new equipments or to improve the efficiency of the energy production equipments. It was proved that in the case of turbine, if a shroud is applied, the efficiency is raised. Given that in this paper is presented a study performed on different geometry of shrouds with different fixing elements. Computational fluid dynamics (CFD) simulations were performed using ANSYS Fluent software. The numerical domain rigorously reproduces an experimental set-up from the laboratory. The rectangular fixing element do not deliver the expected result, instead it decreases the velocity in interest zone. The most important finding is that the velocity of the fluid increases by more than 50% in the most constrained section with convergent-divergent shroud.

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Study of Hydrokinetic Turbine Shrouds

Cited by 6 publications

References 6 publications

Experimental Research on a Kinetic Hydro Turbine - Generator Assembly

Experimental Research on a Kinetic Hydro Turbine - Generator Assembly

Analytical Model and Numerical Finite Element Model for a Submersible Synchronous Hydrogenerator

Evaluation of the Flow Induced by Different Shrouds Geometries

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