A design methodology for cross flow water turbines

Zanette, Jeronimo; Imbault, D.; Tourabi, A.

doi:10.1016/j.renene.2009.09.014

Cited by 57 publications

(43 citation statements)

References 9 publications

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“…In addition to the turbines with horizontal axes, turbines with a vertical axis have been developed, such as the Harvest prototype [26,27]. The different system designs result in very different loadings.…”

Section: Use Of Composites In Prototype Ocean Energy Structuresmentioning

confidence: 99%

Sea Water Ageing of Composites for Ocean Energy Conversion Systems: Influence of Glass Fibre Type on Static Behaviour

2011

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Composite material components will be an essential part of ocean energy recovery devices, and their long term durability in sea water must be guaranteed. Despite extensive experience for boat structures and wind turbines few data exist to design structures subjected to a combination of mechanical loads and sea water immersion. This paper presents the first results from an experimental study, performed jointly with fibre manufacturers, and a resin supplier, to fill this gap. The experimental study is completed by numerical modelling to simulate the coupling between water absorption and mechanical behaviour. Sea water ageing is shown to result in a drop in quasi-static mechanical properties and a change in flexural mode from compression to tension at longer ageing times, which is consistent with results from the numerical simulations.

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Section: Use Of Composites In Prototype Ocean Energy Structuresmentioning

confidence: 99%

Sea Water Ageing of Composites for Ocean Energy Conversion Systems: Influence of Glass Fibre Type on Static Behaviour

2011

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“…In recent years, computational fluid dynamic (CFD) has dominated the fluid dynamic analysis field. Using finite volume or finite element methods [41][42][43], the CFD analysis has the advantages that it is more flexible for condition setting and more accurate than other methods, but it expends more hardware resources and requires a longer time in comparison [44][45][46].…”

Section: Dynamic Analyses Of Helical Water Turbinementioning

confidence: 99%

The Conceptual Design of a Tidal Power Plant in Taiwan

Tsai

Chen

2014

JMSE

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Located on the northwestern of Taiwan, the Matsu archipelago is near mainland China and comprises four islands: Nangan, Beigan, Juguang, and Dongyin. The population of Matsu totals 11,196 and is chiefly concentrated on Nangan and Beigan. From 1971 to 2000, Matsu built five oil-fired power plants with a total installed capacity of 47 MW. However, the emissions and noise generated by the oil-fired power plant has caused damage to Matsu's environment, and the cost of fuel is high due to the long-distance shipping from Taiwan. Developing renewable energy in Matsu has therefore been a fervent topic for the Taiwan government, and tidal power is considered to be of the highest priority due to Matsu's large tidal range (4.29 m in average) and its semidiurnal tide. Moreover, the islands of Nangan and Beigan are composed of granite and have natural harbors, rendering them ideal places for coastal engineering of tidal power plants. This paper begins with a renewable energy reserves assessment in Matsu to determine the amount of tidal energy. Next, a tidal turbine type of the lowest cost is chosen, and then its dynamic characteristic, performance, and related design are analyzed. Finally, the coastal engineering condition was investigated, and a conceptual design for tidal power plant is proposed.

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“…Obviously, the design methodology used to develop the turbine has a significant impact on the performance. Such a design methodology should account for not only the efficient conversion of fluid flow to mechanical energy, but also define, among others, the exact geometry of the blades, the rotational speed of the turbine and the upstream velocity that should be sustained under severe cyclic loading [9]. In this regard, some simulation-based design optimization approaches are proposed in the literature.…”

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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A design methodology for cross flow water turbines

Cited by 57 publications

References 9 publications

Sea Water Ageing of Composites for Ocean Energy Conversion Systems: Influence of Glass Fibre Type on Static Behaviour

Sea Water Ageing of Composites for Ocean Energy Conversion Systems: Influence of Glass Fibre Type on Static Behaviour

The Conceptual Design of a Tidal Power Plant in Taiwan

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

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