Design and performance evaluation of a pump-as-turbine micro-hydro test facility with incorporated inlet flow control

Giosio, Dean R.; Henderson, AD; Walker, GJ; Brandner, PA; Sargison, JE; Gautam, P.

doi:10.1016/j.renene.2014.12.027

Cited by 72 publications

(34 citation statements)

References 8 publications

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“…Most importantly, the vortex size is greatly decreased compared with the target. Since a vortex consists of a multitude of rotating flows, it really poses a threat to the stable inner flows and can also lead to unsteady forces on the runner blade [25,26]. Therefore, as for the optimal samples, the reduction of the vortexes would lead to a performance improvement of the inner flows relative to the target pump.…”

Section: Comparison Of the Characteristicsmentioning

confidence: 99%

Application of the Modified Inverse Design Method in the Optimization of the Runner Blade of a Mixed-Flow Pump

Wang

et al. 2018

Chin. J. Mech. Eng.

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To improve the design speed and reduce the design cost for the previous blade design method, a modified inverse design method is presented. In the new method, after a series of physical and mathematical simplifications, a sail-like constrained area is proposed, which can be used to configure different runner blade shapes. Then, the new method is applied to redesign and optimize the runner blade of the scale core component of the 1400-MW canned nuclear coolant pump in an established multi-optimization system compromising the Computational Fluid Dynamics (CFD) analysis, the Response Surface Methodology (RSM) and the Non-dominated Sorting Genetic Algorithm-II (NSGA-II). After the execution of the optimization procedure, three optimal samples were ultimately obtained. Then, through comparative analysis using the target runner blade, it was found that the maximum efficiency improvement reached 1.6%, while the head improvement was about 10%. Overall, a promising runner blade inverse design method which will benefit the hydraulic design of the mixed-flow pump has been proposed. which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

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Section: Comparison Of the Characteristicsmentioning

confidence: 99%

Application of the Modified Inverse Design Method in the Optimization of the Runner Blade of a Mixed-Flow Pump

Wang

et al. 2018

Chin. J. Mech. Eng.

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“…A schematic of the facility is given in Figure 1. Tests were performed on a 6.2 kW Francis-type micro-hydro turbine designed from pump-as-turbine principles using a 0.226 m diameter five blade impeller coupled to a 15 kW induction motor as generator (for a detailed description, see [12]). All model tests were performed at constant upstream and downstream conditions, at rated turbine net head.…”

Section: Scale Model Rapid Transition Testsmentioning

confidence: 99%

Rapid Reserve Generation from a Francis Turbine for System Frequency Control

et al. 2017

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Abstract:The increase in contributions from non base load renewables, such as wind and solar, can have adverse effects on the stability of an electrical grid. In this study, the possibility of rapidly loading a Francis turbine from a tail water depression (TWD) mode for providing additional system frequency control is investigated. Based on the analysis of full-scale TWD test results and key findings from the transient testing of a micro-hydro scale turbine unit, a detailed description of the TWD transition process is given. The formulation of an improved turbine model for use in one-dimensional hydro-electric plant models is presented with simulation results compared to full-scale data. The analytical model, which calculates output power according to the conservation of angular momentum and identified sources of loss, is used in parallel with full-scale and model scale test observations to elucidate the events and mechanisms occurring during this proposed transition. The output response, in terms of active power, was found to be highly dependent on guide vane opening rate in both full-scale and model tests. For an approximate doubling in opening rate, the duration of the reverse power flow was reduced by 38% and 21%, for full-scale and model units, while the low pressure transient increased by 16% and 8%, respectively. The analytical model was shown to capture the general response characteristic in all cases tested; however, output power response was over predicted due to two identified model assumptions made, while, for the more rapid opening, the penstock pressure was under predicted by approximately 15%.

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“…The characteristics of the turbine and operational conditions are usually defined by three key dimensionless parameters; flow coefficient or discharge number (Φ), energy coefficient or head number (Ψ) and power coefficient (Г) (Giosio 2015).…”

Section: Global Hydraulic Numbers and Turbine Parametersmentioning

confidence: 99%

Design basics of a small hydro turbine plant for capacity building in sub-Saharan Africa

Ebhota

Inambao

2016

African Journal of Science, Technology, Innovation and Developm

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Design and performance evaluation of a pump-as-turbine micro-hydro test facility with incorporated inlet flow control

Cited by 72 publications

References 8 publications

Application of the Modified Inverse Design Method in the Optimization of the Runner Blade of a Mixed-Flow Pump

Application of the Modified Inverse Design Method in the Optimization of the Runner Blade of a Mixed-Flow Pump

Rapid Reserve Generation from a Francis Turbine for System Frequency Control

Design basics of a small hydro turbine plant for capacity building in sub-Saharan Africa

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