Performance analysis of Pelton turbine under different operating conditions: An experimental study

Maher, Hareth; Salih, Mothana M. Mohamed; Ali, Firas Aziz

doi:10.1016/j.asej.2021.101684

Cited by 14 publications

(16 citation statements)

References 17 publications

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“…), the increase in volumetric flow rate (Q) led to a decrease in efficiency. The best operational conditions for the Pelton turbine are smaller nozzle diameter (d) and higher volumetric flow rate (Q) [21]. Bajracharya et al (2008) performed a case study analysis of Chilime HPP.…”

Section: Numerical and Experimentalmentioning

confidence: 99%

See 1 more Smart Citation

A Comprehensive Review on Investigation of Sediment Erosion of Pelton Wheel Turbine

Ullah¹,

Khan²,

Talha³

et al. 2022

PakJET

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Hydro turbines installed at different hydropower plants face the issue of sediment erosion. Sediment erosion is an ambiguous phenomenon influenced by several parameters, including silt concentration, size, jet velocity, diameter, and fluid viscosity. Silt erosion imposes severe issues for hydropower plants, like shutdown and maintenance costs. The hydro turbine efficiency decreases with the increase in sediment erosion and eventually the breakdown of turbine components. Various researchers conducted small-scale experimental bench studies and numerical simulations to analyze the influence of the above-mentioned parameters on silt erosion, but the actual flow conditions are too complex to simulate. Therefore, no such erosion model has been developed to predict exact erosive wear. This paper presents an extensive review of the literature survey on sediment erosive wear of hydro turbines, both the adopted methodology by previous studies and parameters affecting sediment erosion in Pelton turbine are summarized. Based on literature studies, various aspects of erosive wear, parameters influencing it, and its severe effects on efficiency are thoroughly discussed. Appropriate remedial measurements for erosive wear made by multiple researchers, erosion models developed so far, and their measuring accuracy and the future scope of this research study are articulated in detail.

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Section: Numerical and Experimentalmentioning

confidence: 99%

“…The pressure head (H) varies directly with the jet diameter, while efficiency varies inversely. Pressure head (H) depends directly, and efficiency depends inversely on the jet diameter [21].…”

Section: Influence Of Jet Diameter On Erosionmentioning

confidence: 99%

A Comprehensive Review on Investigation of Sediment Erosion of Pelton Wheel Turbine

Ullah¹,

Khan²,

Talha³

et al. 2022

PakJET

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“…10 Hydro-abrasive erosion near the nozzle exit increases the nozzle opening area, increasing the jet diameter. Such increased jet diameter results in reducing the Pelton turbine efficiency as observed by Alomar et al 11 Therefore, it becomes important to predict the erosion rate with an erosion model to estimate the efficiency reduction, sediment cut-off concentration, and time between overhauls. 7,12,13 To develop a correlation between erosion rate and the different parameters involved, experiments were carried out using a rotating type test rig or a jet erosion tester.…”

Section: Introductionmentioning

confidence: 99%

Analysis of hydro-abrasive erosion in a high-head Pelton turbine injector using a Eulerian-Lagrangian approach

Shrivastava,

Rai,

Abbas

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part A:

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High-head hydropower plants deploy Pelton turbines to harness energy; however, turbine components face severe abrasive erosion due to suspended sediments. The erosion of the Pelton injector leads to the degradation of the jet quality, reducing the turbine efficiency considerably. Recently, the erosion of an internal servomotor design of the injector has been studied numerically; however, the cavitation-erosion synergy was not explored. This study serves as the extension of the literature with an analysis of the hydro-abrasive erosion and inception of cavitation in an injector with an external servomotor of a high-head hydropower plant (HPP). A Eulerian-Lagrangian approach is used to study the effects of sediment properties and flow parameters on hydro-abrasive erosion; whereas, the Schnerr-Sauer model is used to analyze the inception of cavitation. Interestingly, an increase in particle size from 40 microns to 200 microns resulted in a 95.7% reduction in needle erosion; but, led to a two-fold increase in nozzle erosion. For an increase in the plant head from 200 m to 820 m, the increase in erosion rate of the nozzle and the needle is 4.36 and 1.4 times, respectively. Moreover, the possibility of cavitation in the Pelton injector also increases with an increase in the head of the HPP leading the injector to higher susceptibility to the synergic effect of cavitation and hydro-abrasive erosion. This study attempts to assist the hydropower development in high-head regions with a risk of high sediment flow and manage the existing plants efficiently.

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“…To obtain the highest possible efficiency in the generation of electrical energy from hydroelectric plants, it is important to know the behavior of the variables that we can monitor, such as water flow rate, touch, turbine rotation speed, vibrations, etc. in order to quantify the best point of operation of the system (Rafae Alomar et al, 2022a).…”

Section: Introductionmentioning

confidence: 99%

“…Abstract: In this work, the commissioning of a 10 kW power micro-hydraulic plant has been carried out, with the purpose of carrying out an experimental work to analyze the effect of the variation of the operating conditions on the performance of a Pelton Turbine. Although the characterization of the Pelton turbine has been carried out using different injector diameters, water flow rates, with different braking powers of the shaft, it has not been characterized for different pressure heights, but only the variations of these due to the effect of the flow rate variation and injector diameters, considering power generated in the turbine shaft of 70 (W) (Rafae Alomar et al, 2022a). In this work, an experimental characterization of a turbine is carried out considering different injector openings d, pressure heights H and water flow rate Q.…”

mentioning

confidence: 99%

Estudio Experimental Del Rendimiento De Una Turbina Pelton De Una Microcentral Para Distintas Condiciones De Operación

Currín¹,

Muñoz²,

Cortés³

2023

JER

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Performance analysis of Pelton turbine under different operating conditions: An experimental study

Cited by 14 publications

References 17 publications

A Comprehensive Review on Investigation of Sediment Erosion of Pelton Wheel Turbine

A Comprehensive Review on Investigation of Sediment Erosion of Pelton Wheel Turbine

Analysis of hydro-abrasive erosion in a high-head Pelton turbine injector using a Eulerian-Lagrangian approach

Estudio Experimental Del Rendimiento De Una Turbina Pelton De Una Microcentral Para Distintas Condiciones De Operación

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