Performance of Pelton Turbine for Hydroelectric Generation in Varying Design Parameters

Kholifah, Nur; Setyawan, Ary; Wijayanto, Danar Susilo; Widiastuti, Indah; Saputro, Herman

doi:10.1088/1757-899x/288/1/012108

Cited by 10 publications

(5 citation statements)

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“…5.1 5.9 6.4 6.5 6.7 6.8 7.0 7.1 7.0 6.8 6.7 6.5 6.4 5.9 5.1 -50 5.1 6.4 6.7 6.6 6.8 7.0 7.1 7.2 7.1 7.0 6.8 6.6 6.7 6. 4 the jet, the axial velocity remains quite constant till the outer edge of the jet confirming the good quality of the formed water jet. The activities were conducted as part of the Turb-Hydro project that also involved the company Troyer S.p.A. in Sterzing -Vipiteno (BZ).…”

Section: Discussionmentioning

confidence: 58%

“…Hydropower rotors, such as Pelton [3], [4], Francis [5], [6] and Kaplan [7], [8], are designed according to the values of hydropower plant's flow rate and hydraulic head. Focusing the attention on Pelton machines, this is an action hydraulic turbine characterized by low values of specific speed since it exploits low flow rates and high heads.…”

Section: Introductionmentioning

confidence: 99%

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Laser Doppler Anemometry technique to study the flow field in the nozzle and in the water jet of a Pelton turbine

Pisaturo,

Nicolosi,

Gusmerotti

et al. 2023

J. Phys.: Conf. Ser.

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The constant availability of water from the mountain basins is crucial to feed the hydropower plants that currently represent the most important renewable energy source in many countries, like Italy. The long dry periods that are nowadays registered during the summer periods have imposed the managers of the hydropower plants to operate the machines at very low flow rates, close to the lowest allowed values. In this work we focus our attention on the fluid-dynamics of the water jet of a Pelton machine and of the corresponding nozzle, with particular attention to the low flow-rate ranges. The nozzle has been manufactured in PMMA to be able to study the internal fluid-dynamics using the Laser Doppler Anemometry (LDA) technique. The shape of the nozzle has been adapted to limit the laser beam distortion and an algorithm has been implemented to correct the position of the measurement volume and the evaluation of the velocity components. Moreover, a specific measurement layout has been proposed and implemented to be able to study the velocity of the water jet downstream the nozzle and to study the homogeneity of the flow velocity in the jet, which is a crucial characteristic to grant a proper operation of the Pelton runner. The specific set-up of the test bench and the LDA parameters are presented; the signal of the LDA receiver proved to be very consistent and reliable. Moreover, the results of the measurements have been used to validate CFD simulations and to extend the results of the analyses to other operating conditions of the Pelton nozzle

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Section: Discussionmentioning

confidence: 58%

Section: Introductionmentioning

confidence: 99%

Laser Doppler Anemometry technique to study the flow field in the nozzle and in the water jet of a Pelton turbine

Pisaturo,

Nicolosi,

Gusmerotti

et al. 2023

J. Phys.: Conf. Ser.

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show abstract

“…Kholifah et al measured the power of the Pelton Turbine for four nozzle diameters (ranging between 5 mm and 11 mm). The highest power was obtained for the nozzle with 9 mm diameter [20]. Petley et al showed that increasing the angle at the tip of the injector spear causes nonoptimal jet-runner interaction [21].…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation of Nozzle Jet Flow in a Pelton Microturbine

2021

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The characterization of flow through Pelton hydro turbines allows the optimization of their operation and maximization of energy performance. The flow in the injector of Pelton turbines and in the free jet area (the area from the injector outlet surface to the runner bucket inlet surface) is influenced by several parameters: the geometry of injector components (nozzle and injector spear), the injector opening, and the turbine head. The parameters of the free jet flow (velocity distribution, pressure distribution, and jet spread) are reflected in the turbine efficiency. The research presented in this paper focuses on the numerical characterization of flow in the injector and the free jet of a Pelton microturbine. Three injector geometries were considered, with different nozzle diameters: 13.3 mm, 14.4 mm, and 16.3 mm. For each of these geometries, the flow was analyzed for five values of turbine head (H = 15 m, H = 20 m, H = 25 m, H = 30 m, H = 35 m) and six values of injector opening (S = 3 mm, S = 6 mm, S = 9 mm, S = 12 mm, S = 15 mm, S = 18 mm). The results of numerical simulations were used to plot injector flow-rate characteristics and injector force characteristics (the resultant force on the injector spear and the resultant force on the injector nozzle). The highest influence on the flow rate variation is given by the variation of turbine head, followed by the variation of the injector opening and the variation of the nozzle diameter. Increasing the nozzle diameter accentuates the variation of the flow rate versus the turbine head. The variation of axial velocity and pressure in the free jet is presented for four sections parallel to the outlet section of the injector. The injector openings that generate the highest values of velocity/pressure on the runner inlet surface are highlighted. The results allow optimization of functional parameters for increasing turbine efficiency and optimizing the design process of Pelton microturbines.

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“…Indonesia is known as a maritime country that has abundant water resources in which it can be functioned as much as possible as a renewable energy resource. Hence, in fact, the utilization of renewable energy resources to produce electricity is less than 6.8% of the total available resources [1]. One of the many natural resources available in Indonesia is mineral and energy resources.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation of design parameters for laboratory scale Pelton wheel turbine using RSM

et al. 2018

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Response Surface Methodology (RSM) is used in this study as an experimental design to obtain optimum conditions for each parameter. This study uses pelton turbines on a laboratory scale. The purpose of this study is to determine the optimum number of buckets and flow rates against turbine performance. The performance measured in this study is turbine efficiency. RSM is used to obtain mathematical equations from the performance of the turbine at optimum conditions. The optimum results obtained from RSM is to improve the performance of Pelton turbines that are 15,7714 (16 pieces) and flow rate of 0.1583 ℓ / s (0.16 ℓ / s) resulting in turbine efficiency of 29.16%.

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Performance of Pelton Turbine for Hydroelectric Generation in Varying Design Parameters

Cited by 10 publications

References 0 publications

Laser Doppler Anemometry technique to study the flow field in the nozzle and in the water jet of a Pelton turbine

Laser Doppler Anemometry technique to study the flow field in the nozzle and in the water jet of a Pelton turbine

Numerical Investigation of Nozzle Jet Flow in a Pelton Microturbine

Experimental investigation of design parameters for laboratory scale Pelton wheel turbine using RSM

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