Turbulence Intensity Effects on the Vertical Axis Wind Turbine Starting Efficiency

Mălăel, Ion; Drãgan, Valeriu; Gherman, George Bogdan

doi:10.2507/26th.daaam.proceedings.137

Cited by 5 publications

(3 citation statements)

References 8 publications

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“…This approach defines a zero turbulence power curve that may be used to generate power output using either a measured or reference wind speed distribution. Recent works on turbulence intensity and wind turbines can be found in [32][33][34][35][36][37].…”

Section: A Related Workmentioning

confidence: 99%

Accounting for Environmental Conditions in Data-Driven Wind Turbine Power Models

Pandit

Infield

Peñas

2023

IEEE Trans. Sustain. Energy

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Continuous assessment of wind turbine performance is a key to maximising power generation at a very low cost. A wind turbine power curve is a non-linear function between power output and wind speed and is widely used to approach numerous problems linked to turbine operation. According to the current IEC standard, power curves are determined by a data reduction method, called binning, where hub height, wind speed and air density are considered as appropriate input parameters. However, as turbine rotors have grown in size over recent years, the impact of variations in wind speed, and thus of power output, can no longer be overlooked. Two environmental variables, namely wind shear and turbulence intensity, have the greatest impact on power output. Therefore, taking account of these factors may improve the accuracy as well as reduce the uncertainty of data-driven power curve models, which could be helpful in performance monitoring applications. This paper aims to quantify and analyse the impact of these two environmental factors on wind turbine power curves.Gaussian process (GP) is a data-driven, nonparametric based approach to power curve modelling that can incorporate these two additional environmental factors. The proposed technique's effectiveness is trained and validated using historical 10-minute average supervisory control and data acquisition (SCADA) datasets from variable speed, pitch control, and wind turbines rated at 2.5 MW. The results suggest that (i) the inclusion of the additional environmental parameters increases GP model accuracy and reduces uncertainty in estimating the power curve; (ii) a comparative study reveals that turbulence intensity has a relatively greater impact on GP model accuracy, together with uncertainty as compared to blade pitch angle. These conclusions are confirmed using performance error metrics and uncertainty calculations. The results have practical beneficial consequences for O&M related activities such as early failure detection.

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Section: A Related Workmentioning

confidence: 99%

Accounting for Environmental Conditions in Data-Driven Wind Turbine Power Models

Pandit

Infield

Peñas

2023

IEEE Trans. Sustain. Energy

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“…Wind turbines are of two types, Horizontal Axis Wind Turbine (HAWT) and Vertical Axis Wind Turbine (VAWT). VAWT is mostly viable for places with low wind speed regimes where HAWT is highly uneconomical [8]. The combination of two vertical axis wind turbines was studied by many researchers [9][10][11].…”

Section: Fig 1 Schematic Smart Energy System [6]mentioning

confidence: 99%

Increase the Smart Cities Development by Using an Innovative Design for Vertical Axis Wind Turbine

Mălăel¹,

Gherman²,

Porumbel³

2016

Proceedings of the 27th International DAAAM Symposium 2016

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In the actual urban development context, the smart city concept is frequently used. This concept has not an unique definition, but is always defined as of positive impact. At the base of this concept, is placed the challenge to reduce the environmental impact and the carbon footprint. Smart city is a system with people, financing, services, materials and also energy development. To create a sustainable smart environment is crucial to integrate different renewable energy, transport and data flows in city planning and management. However, the implementation of new technologies must be fitted with the existing structures. In this paper, we study a counter rotating vertical axis wind turbine. To investigate the flow in this new concept we used the CFD methods. For solving the Navier-Stokes system equation the commercial CFD ANSYS Fluent was used. The vorticity magnitude and the momentum and power coefficient variation by blade position resulting from the numerical simulations are presented.

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“…With growing ecological awareness, share of renewable energy in total energy production is rapidly increasing. Different designs in hydro and wind turbines are constantly being investigated to produce greater efficiency, where usage of numerical analysis provide great insight into fluid flow phenomena and guidelines for design changes [1], [2]. Analysis can be conducted for the whole turbine or for particular parts, where improvement in design of single part of turbine contributes to whole turbine efficiency.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Numerical Simulation Parameters on Fluid Flow Around Trash-Racks

Čarija¹,

Lučin²,

Lučin³

et al. 2018

Proceedings of the 29th International DAAAM Symposium 2018

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Trash-racks provide protection for hydraulic turbines by blocking entrance of large debris that could damage turbine parts. Trash-racks also help reduce fish injuries and mortality caused with fish entrapment in turbine. Installation of trash-racks is necessary, but causes inevitable head losses that decrease water turbine energy production. With increasing ecological concerns different bar-rack configurations are examined to provide better fish protection, mostly not considering head losses. Experimental results of head losses caused by trash-racks found in literature are conducted on scaled models due to experiment facility limitations while number of investigated configurations is limited with cost of production. Most head loss equations derived from experimental results are valid only in specific range of parameters. Considering these limitations, numerical simulations would enable investigation of a large number of trash-rack combinations, where simulations can be conducted for turbine intake geometries made in full scale. In this work numerical simulation results will be compared with experimental results from literature. Geometry, mesh and simulation parameters will be investigated, considering influence on simulation results agreement with experiment. Guidelines for numerical simulation setup will be provided for future work where investigation of trash-rack configurations that are not yet covered in literature can be conducted.

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Turbulence Intensity Effects on the Vertical Axis Wind Turbine Starting Efficiency

Cited by 5 publications

References 8 publications

Accounting for Environmental Conditions in Data-Driven Wind Turbine Power Models

Accounting for Environmental Conditions in Data-Driven Wind Turbine Power Models

Increase the Smart Cities Development by Using an Innovative Design for Vertical Axis Wind Turbine

Investigation of Numerical Simulation Parameters on Fluid Flow Around Trash-Racks

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