Optimal sizing of a run-of-river small hydropower plant

Anagnostopoulos, John S.; Papantonis, Dimitris

doi:10.1016/j.enconman.2007.04.016

Cited by 127 publications

(83 citation statements)

References 8 publications

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“…If we assume the optimal value of the relative tangent velocity to maintain the value computed in Equation (9), we can compute either the diameter D 1 or the α angle by substituting Equation (9) in Equation (7). Assuming that 1 …”

Section: First Step: Design Of Basic Parametersmentioning

confidence: 99%

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Banki-Michell Optimal Design by Computational Fluid Dynamics Testing and Hydrodynamic Analysis

et al. 2013

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Abstract:In hydropower, the exploitation of small power sources requires the use of small turbines that combine efficiency and economy. Banki-Michell turbines represent a possible choice for their simplicity and for their good efficiency under variable load conditions. Several experimental and numerical tests have already been designed for examining the best geometry and optimal design of cross-flow type machines, but a theoretical framework for a sequential design of the turbine parameters, taking full advantage of recently expanded computational capabilities, is still missing. To this aim, after a review of the available criteria for Banki-Michell parameter design, a novel two-step procedure is described. In the first step, the initial and final blade angles, the outer impeller diameter and the shape of the nozzle are selected using a simple hydrodynamic analysis, based on a very strong simplification of reality. In the second step, the inner diameter, as well as the number of blades and their shape, are selected by testing single options using computational fluid dynamics (CFD) simulations, starting from the suggested literature values. Good efficiency is attained not only for the design discharge, but also for a large range of variability around the design value. OPEN ACCESSEnergies 2013, 6 2363

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Section: First Step: Design Of Basic Parametersmentioning

confidence: 99%

“…The use of RES includes small hydroelectric power (less than 1-3 MW) located along small rivers [1,2] or along water transmission and distribution pipeline systems [3,4] and characterized by continual changes occurring in the turbine operating conditions (discharge and/or load).…”

Section: Introductionmentioning

confidence: 99%

Banki-Michell Optimal Design by Computational Fluid Dynamics Testing and Hydrodynamic Analysis

et al. 2013

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“…For run-of-river analysis, the classical flowduration curve approach seems to be the main method in use (McMahon & Adeyole, 2005) although many methods are available for run-of-river hydropower schemes (Cesari et al, 2004;Paravan et al, 2004;Anagnostopoulos & Papantonis, 2007;Garrido et al, 2009). A single flow-duration curve for the complete time series provides an idea of the long-term performance, but fails to provide a measure of reliability based on inter-annual variability.…”

Section: Introductionmentioning

confidence: 99%

Yield–reliability analysis for rural domestic water supply from combined rainwater harvesting and run-of-river abstraction

Ndiritu

Odiyo

Makungo

et al. 2011

Hydrological Sciences Journal

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Yield-reliability analysis for rural domestic water supply from combined rainwater harvesting and run-of-river abstraction. Hydrol. Sci. J. 56(2), 238-248. AbstractIn many rural areas, reticulated water supply from large water resources schemes does not exist and many households obtain water from groundwater (GW), rainwater harvesting (RWH), run-of-river (ROR) flow, or combinations of these. While comprehensive yield-reliability analysis for large water resource systems is the norm, typical rural water supply analysis unrealistically aggregates data into monthly or annual time steps and does not incorporate reliability. A daily time-step simulation of household supply and frequency analysis of the number of days supplied in each year is used herein to: (a) demonstrate a realistic approach of yield-reliability analysis for RWH, ROR and combined RWH and ROR supply; and (b) show how combined utilization of the two can lead to improved supply. Integration of RWH and ROR supply has been found to improve yield and reliability substantially. The limitations of using the simpler mass curve analysis and the effect of applying a monthly time step are demonstrated.

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“…However, the study was limited only to turbine configurations without a guide valve and mainly on parameters embedded in the rotor design. Anagnostopoulos and Papantonis [13], on the other hand, conducted size optimization of small hydropower plants using a then newly-developed evaluation algorithm. However, their focus was on the overall plant performance using basic plant size parameters to optimize project cost.…”

Section: Introductionmentioning

confidence: 99%

CFD-Driven Valve Shape Optimization for Performance Improvement of a Micro Cross-Flow Turbine

2018

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Abstract:Turbines are critical parts in hydropower facilities, and the cross-flow turbine is one of the widely applied turbine designs in small-and micro-hydro facilities. Cross-flow turbines are relatively simple, flexible and less expensive, compared to other conventional hydro-turbines. However, the power generation efficiency of cross-flow turbines is not yet well optimized compared to conventional hydro-turbines. In this article, a Computational Fluid Dynamics (CFD)-driven design optimization approach is applied to one of the critical parts of the turbine, the valve. The valve controls the fluid flow, as well as determines the velocity and pressure magnitudes of the fluid jet leaving the nozzle region in the turbine. The Non-Uniform Rational B-Spline (NURBS) function is employed to generate construction points for the valve profile curve. Control points from the function that are highly sensitive to the output power are selected as optimization parameters, leading to the generation of construction points. Metamodel-assisted and metaheuristic optimization tools are used in the optimization. Optimized turbine designs from both optimization methods outperformed the original design with regard to performance of the turbine. Moreover, the metamodel-assisted optimization approach reduced the computational cost, compared to its counterpart.

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Optimal sizing of a run-of-river small hydropower plant

Cited by 127 publications

References 8 publications

Banki-Michell Optimal Design by Computational Fluid Dynamics Testing and Hydrodynamic Analysis

Banki-Michell Optimal Design by Computational Fluid Dynamics Testing and Hydrodynamic Analysis

Yield–reliability analysis for rural domestic water supply from combined rainwater harvesting and run-of-river abstraction

CFD-Driven Valve Shape Optimization for Performance Improvement of a Micro Cross-Flow Turbine

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