Micro Hydro Electric Power Plant (MHEP) Prototype A Study Of The Effect Of Blade Numbers Toward Turbine Rotational Velocity

Asrafi, Ibnu; Yerizam, Muhammad; Effendi, Sairul; Mataram, Agung

doi:10.1088/1742-6596/1198/4/042001

Cited by 5 publications

(3 citation statements)

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“…The basic elements of a coherent structure are the "streak structure" and the "vortex structure" (Zhang 2017), which are located in a fully developed turbulent boundary layer and form a relatively stable circulation mechanism. If any link in this mechanism is destroyed, the self-sustaining process of the turbulent coherent structure can be controlled and turbulent bursts can be suppressed (Asrafi et al 2019).…”

Section: Coherent Structurementioning

confidence: 99%

Drag Reduction Characteristics of Bionic Structure Composed of Grooves and Mucous Membrane Acting on Turbulent Boundary Layer

Zhang

et al. 2022

JAFM

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The biological surface structure comprising fish scales and a mucous membrane exhibits good turbulent drag reduction ability. Based on this structure, a bionic frictional drag reduction model composed of a grooved structure and mucous membrane was established herein, and its efficacy in reducing the resistance of a turbulent boundary layer was analyzed. Accordingly, the drag reduction performance of the bionic structure was investigated through large eddy simulations. The results revealed that the mucous membrane was evenly distributed on the groove wall through secretion, and effectively improved the drag reduction rate of the groove wall. The bionic grooves and mucous membrane structure successfully inhibited the turbulent kinetic energy, turbulence intensity, and Reynolds stress. The grooved structure improved the shape of the Λ vortex structure and the mucous membrane reduced the number of three-dimensional (3D) vortex structures. Furthermore, the streak structure near the bionic structure wall was reduced and its shape was regularized, which intuitively demonstrates the turbulence suppression ability of the proposed bionic structure. This paper presents the results of a hydrodynamic analysis of the frictional drag reduction characteristics of a bionic structure consisting of grooves and viscous membranes acting on the turbulent boundary layer of a wall.

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Section: Coherent Structurementioning

confidence: 99%

Drag Reduction Characteristics of Bionic Structure Composed of Grooves and Mucous Membrane Acting on Turbulent Boundary Layer

Zhang

et al. 2022

JAFM

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“…Ahmed 22 points out that passage and incidence losses decrease with the increase in blade numbers, which improving the swallowing capacity and efficiency. Ibnu 23 finds out that the water discharge decreased with the increase in blade numbers. Young‐Do 24 figures out that the blade number of runner has remarkable influence on efficiency and power.…”

Section: Introductionmentioning

confidence: 99%

Influence of blade number on performance of multistage hydraulic turbine in turbine mode

Zhang

et al. 2022

Energy Science & Engineering

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Compared with the traditional reverse multistage pump as hydraulic turbine, hydraulic turbine in turbine mode (T‐type turbine) with low specific speed has higher single‐stage energy head, which can effectively reduce stages and increase the stability when it is used to recycle high residual pressure liquid. Blade number of runner is an important design parameter, which has great influence on the performance of T‐type hydraulic turbine and need to be further studied. Therefore, two‐stage T‐type turbine models with different blade numbers are established through numerical simulation. Then, the accuracy of numerical simulation is verified by test. Finally, the performance and pressure fluctuating characteristics of turbine with different blade numbers are obtained. The results show that: (a) Taking same blade numbers in both stages (traditional design method), the turbine efficiency can be higher with the blade number of primary runner and secondary runner are 14, but resulting the superposition of pulsation in secondary runner; (b) Taking different blade numbers in both stages, respectively, the superposition of pulsation can be effectively avoided, which also leads to the increase in efficiency, and up to 81.169%; (c) The method of using different number of blades in different stages can replace the traditional design method and effectively improve the hydraulic performance of T‐type hydraulic turbine.

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“…The significance of the study on the effects of blade angle and number on micro-hydro power generation lies in their potential to optimize the performance and efficiency of micro-hydro power generation. Studies [5][6][7][8] aim to determine the optimal angle and number of blades for maximum electrical power output, which can result in more efficient and cost-effective micro-hydro power generation. The study by [9] also highlights the importance of turbine design in micro-hydro systems.…”

Section: Introductionmentioning

confidence: 99%

Identifying the influence of blade number and angle of attack on a breastshot type waterwheel micro hydroelectric power generator using ANOVA

Syuriadi,

Siswantara,

Purnama

et al. 2023

EEJET

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This study focuses on optimizing the performance of micro-hydro power generation, specifically the breastshot type waterwheel. The limited availability of non-renewable energy sources and the high cost of developing renewable energy sources in the energy sector pose challenges, making it essential to find new energy sources and improve energy efficiency. The 2004–2022 national electricity plan aims to increase electricity access in rural areas, including remote regions like Bogor Regency, where access to electricity is limited. Many residents have constructed their own micro hydroelectric power generators, but their vulnerability to natural disasters is a concern. The study investigates the potential of breastshot waterwheel technology for micro hydroelectric power generation. The study involved testing a micro hydro power plant with 6, 8, and 10 blades and blade angles of 0°, 30°, and 45°. The current research focuses on performance optimization, including the use of ANOVA analysis to know the significant impact of blade number and angle on the waterwheel’s rotation. The maximum rotational speed was achieved with 10 blades and an angle of attack of 0°, 30°, and 45°, with respective speeds of 153.59 RPM, 155.84 RPM, and 164.95 RPM. The study indicates that the higher the number and angle of attack of blades, the greater the rotation of the breastshot type waterwheel. ANOVA tests showed that the number of blades had a significant impact on the waterwheel’s rotation, with an F-test value of 6.32 and a p-value of 0.012. On the other hand, the angle of attack of the blade had no significant impact, with an F-test value of 3.20 and a p-value of 0.067

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Micro Hydro Electric Power Plant (MHEP) Prototype A Study Of The Effect Of Blade Numbers Toward Turbine Rotational Velocity

Cited by 5 publications

References 0 publications

Drag Reduction Characteristics of Bionic Structure Composed of Grooves and Mucous Membrane Acting on Turbulent Boundary Layer

Drag Reduction Characteristics of Bionic Structure Composed of Grooves and Mucous Membrane Acting on Turbulent Boundary Layer

Influence of blade number on performance of multistage hydraulic turbine in turbine mode

Identifying the influence of blade number and angle of attack on a breastshot type waterwheel micro hydroelectric power generator using ANOVA

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