Novel trends in modelling techniques of Pelton Turbine bucket for increased renewable energy production

Bhattarai, Suyesh; Vichare, Parag; Dahal, Keshav; Makky, Ahmed Al; Olabi, Abdul Ghani

doi:10.1016/j.rser.2019.05.045

Cited by 41 publications

(18 citation statements)

References 68 publications

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“…Still some important parameters such as split angle, exit angle, cut-out and depth are missing. Bucket parameters such as width, depth, splitter angle, exit angle, shape and the cut-out govern the geometry of the bucket [15].…”

Section: Bucketmentioning

confidence: 99%

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Design of Pelton Turbine and Bucket Surface using Non-Uniform Rational Basis Spline and its Analysis with Computational Fluid Dynamics

Adhikari

Pandey

Subedi

et al. 2021

J. Inst. Engineering

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Hydraulic turbines are used to convert the energy in flowing water to rotational mechanical energy. The design of high head Pelton turbine is difficult due to complex flow pattern on different parts. The basic dimensions can be obtained from interpolation techniques and design trends but the main challenge is to model the hydrodynamic surface. The surface must be designed such that it would harvest energy in an efficient manner and the manufacturing of the surface is also economic and simple. For the design of Pelton turbine, the data from Kulekhani-I hydropower is taken. Pelton turbine is designed for the given head (550 m), flow rate (6.05 m3/sec) and speed (600 rpm). For basic dimensions, interpolation techniques and design trends are used. Number of buckets is calculated for maximum efficiency condition and found to be twenty. Nozzle and spear are selected based on hydraulic efficiency. Spear angle and nozzle angle of 70° and 100° respectively are selected. The bucket surface is designed with the help of second order B-Spline. Circular and Second order B-spline surfaces with different depths are analyzed using commercial CFD code. The second order B-Spline with depth 186.22 mm is found to be more effective in terms of force exerted by the jet among the given surfaces. Finally, Bucket surface is generated using non-uniform rational B‑spline (NURBS) modeling after all the basic dimensions are determined. For verification, the design is compared with the design of commercial design software and the turbine in Kulekhani-I hydropower plant.

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Section: Bucketmentioning

confidence: 99%

“…However, bucket with a cut-out can be seen in recent studies [3]. It ensures a continuous torque generation and a smoother flow [15]. The performances of bucket on varying the shape of cut-out have been studied [16].…”

Section: Bucketmentioning

confidence: 99%

Design of Pelton Turbine and Bucket Surface using Non-Uniform Rational Basis Spline and its Analysis with Computational Fluid Dynamics

Adhikari

Pandey

Subedi

et al. 2021

J. Inst. Engineering

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“…This includes the initiative to develop small-scale hydro-electric power plants, with a variety of capacities between 1 kW up to 1 MW. A myriad of small, micro-hydropower plants have been designed and implemented, Lajqi et al [6], including Pelton [6,7], Turgo [8,9,10], Francis, Kaunda et al [11], and Kaplan turbines. These turbines work with either high or medium water heads with a smaller amount of water flow, and various other turbines such as propeller and cross-flow turbines, which work under conditions of low water heads and large flow rates.…”

Section: Introductionmentioning

confidence: 99%

Design, Implementation and Analysis of the Overall Performance of a Micro Hydro Turgo Turbine

Lajqi

Bresa

et al. 2021

Journal of Thermal Engineering

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The increasing demand for energy and the concerns regarding environmental protection have been driving forces toward the exploitation of renewable energy sources as a better alternative compared to conventional energy sources. Furthermore, renewable energy sources enable an independent energy supply for isolated locations or communities that lack access to the main electricity grid, and additionally, they offer the possibility to use available energy sources for beneficial individual purposes. Considering these statements, the use of micro hydropower plants represents a convenient and advantageous option to implement. A micro hydro Turgo turbine is used for analysis in this paper, due to its simple design, structure, easy production and low installation cost.In this manner, this paper deals with the use of Euler equations in detailed analysis in designing and implementation of a micro hydro Turgo turbine. The presented methodology will be based on numerical calculations of micro hydro Turgo turbine characteristic parameters in various operating regimes. The obtained results from numerical calculation will be compared to the current performance of the real existing Turgo turbine. Accordingly, based on obtained results, recommendations for improving the performance of micro hydro Turgo turbines will be presented.

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“…It generates power by utilizing the momentum of a water jet that impinges (tangentially) on the buckets mounted on the periphery of the runner. Although the highest efficiency can reach 92% [ 4 ], the Pelton turbine continue to be improved [ 5 , 6 , 7 ]. 16% of the current installed turbines in the European Union are Pelton turbines [ 8 ], while in Europe 31% of turbines in hydropower plants larger than 50 MW are Pelton type ( Figure 1 , data of 2009).…”

Section: Introductionmentioning

confidence: 99%

The state-of-art of design and research for Pelton turbine casing, weight estimation, counterpressure operation and scientific challenges

Quaranta¹,

Trivedi²

2021

Heliyon

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The Pelton turbine is the most widespread and efficient impulse hydropower turbine. The Pelton casing is a static, but key component: the internal hydrodynamic phenomena affect the performance of the hydropower plant, the vibration of the equipment and water quality (dissolved oxygen downstream). However, the literature information is very fragmented and not well organized, so that the design is generally based on empirical rules and on proper know-how of hydropower companies. In this paper, the state-of-the-art of the Pelton casing is reviewed and organized under three macro areas: hydraulics, mechanics (vibrations and weight) and aeration. The preliminary design procedure is described and discussed in light of recent scientific results, and the open questions and research challenges are highlighted. Innovative case studies are described (including counterpressure operation) and a dataset of installed casings (not available in literature) is elaborated to derive an empirical equation to estimate the casing weight. The efficiency can be improved by 3% by an optimal fluid dynamic design and a better understanding of the internal hydrodynamics. Proper inserts can improve the hydraulic efficiency by 2%, reduce the weight (by about 12%) and better bear the vibrations. Several scientific questions are still open, and a better understanding of the fluid structure interaction is needed to improve efficiency, operation and water quality.

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Novel trends in modelling techniques of Pelton Turbine bucket for increased renewable energy production

Cited by 41 publications

References 68 publications

Design of Pelton Turbine and Bucket Surface using Non-Uniform Rational Basis Spline and its Analysis with Computational Fluid Dynamics

Design of Pelton Turbine and Bucket Surface using Non-Uniform Rational Basis Spline and its Analysis with Computational Fluid Dynamics

Design, Implementation and Analysis of the Overall Performance of a Micro Hydro Turgo Turbine

The state-of-art of design and research for Pelton turbine casing, weight estimation, counterpressure operation and scientific challenges

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