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Coalescing Wind Turbine Wakes Article
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Book Synopsis Coalescing Wind Turbine Wakes; Article by :
Download or read book Coalescing Wind Turbine Wakes; Article written by and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A team of researchers from the National Renewable Energy Laboratory and Statoil used large-eddy simulations to numerically investigate the merging wakes from upstream offshore wind turbines. Merging wakes are typical phenomena in wind farm flows in which neighboring turbine wakes consolidate to form complex flow patterns that are as yet not well understood. In the present study, three 6-MW turbines in a row were subjected to a neutrally stable atmospheric boundary layer flow. As a result, the wake from the farthest upstream turbine conjoined the downstream wake, which significantly altered the subsequent velocity deficit structures, turbulence intensity, and the global meandering behavior. The complexity increased even more when the combined wakes from the two upstream turbines mixed with the wake generated by the last turbine, thereby forming a "triplet" structure. Although the influence of the wake generated by the first turbine decayed with downstream distance, the mutated wakes from the second turbine continued to influence the downstream wake. Two mirror-image angles of wind directions that yielded partial wakes impinging on the downstream turbines yielded asymmetric wake profiles that could be attributed to the changing flow directions in the rotor plane induced by the Coriolis force. In conclusion, the turbine wakes persisted for extended distances in the present study, which is a result of low aerodynamic surface roughness typically found in offshore conditions.
Download or read book Coalescing Wind Turbine Wakes written by and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A team of researchers from the National Renewable Energy Laboratory and Statoil used large-eddy simulations to numerically investigate the merging wakes from upstream offshore wind turbines. Merging wakes are typical phenomena in wind farm flows in which neighboring turbine wakes consolidate to form complex flow patterns that are as yet not well understood. In the present study, three 6-MW turbines in a row were subjected to a neutrally stable atmospheric boundary layer flow. As a result, the wake from the farthest upstream turbine conjoined the downstream wake, which significantly altered the subsequent velocity deficit structures, turbulence intensity, and the global meandering behavior. The complexity increased even more when the combined wakes from the two upstream turbines mixed with the wake generated by the last turbine, thereby forming a "triplet" structure. Although the influence of the wake generated by the first turbine decayed with downstream distance, the mutated wakes from the second turbine continued to influence the downstream wake. Two mirror-image angles of wind directions that yielded partial wakes impinging on the downstream turbines yielded asymmetric wake profiles that could be attributed to the changing flow directions in the rotor plane induced by the Coriolis force. In conclusion, the turbine wakes persisted for extended distances in the present study, which is a result of low aerodynamic surface roughness typically found in offshore conditions.
Book Synopsis Handbook of Wind Energy Aerodynamics by : Bernhard Stoevesandt
Download or read book Handbook of Wind Energy Aerodynamics written by Bernhard Stoevesandt and published by Springer Nature. This book was released on 2022-08-04 with total page 1495 pages. Available in PDF, EPUB and Kindle. Book excerpt: This handbook provides both a comprehensive overview and deep insights on the state-of-the-art methods used in wind turbine aerodynamics, as well as their advantages and limits. The focus of this work is specifically on wind turbines, where the aerodynamics are different from that of other fields due to the turbulent wind fields they face and the resultant differences in structural requirements. It gives a complete picture of research in the field, taking into account the different approaches which are applied. This book would be useful to professionals, academics, researchers and students working in the field.
Book Synopsis Wind Turbine Wakes, Wake Effect Impacts, and Wind Leases by : Kimberly Diamond
Download or read book Wind Turbine Wakes, Wake Effect Impacts, and Wind Leases written by Kimberly Diamond and published by . This book was released on 2017 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wind rights and access to natural wind flow raise important legal issues, policy questions, opportunities, and financial risks for landowners, their neighbors, and for wind facility developers. This is particularly evident with respect to the phenomenon called wake effect (downwind effect) that occurs between commercial upwind turbines and downwind turbines. Upwind turbines create wind wakes that impact the natural wind flow to adjacent downwind turbines, causing the downwind turbines to experience diminished energy prosecution and, in some cases, increased mechanical loads. The rights and income streams that are tied to this diminution can influence a developer's decisions to erect turbines in certain locations or to construct a wind project altogether. At a minimum, for wind projects that are constructed, developers and landowners on whose property commercial wind turbines are placed should consider the impact of wake effect on turbine placement, operation, and performance. The United States currently lacks a comprehensive national standard, federal guidelines, legislation, Supreme Court precedent, or a regulatory structure that establishes a unified approach to wind rights, including a uniform minimum setback distance (the length of the buffer zone between two utility-scale wind turbines, or between a utility-scale wind turbine and the adjacent landowner's property line). Through the example of wake effect, this article argues that a non-unified approach to wind rights as a matter of policy is not optimal for several reasons. First, inconsistent laws, rules, and regulations across state lines and between local jurisdictions - such as the absence or presence of setback distances between wind turbines - factor into the magnitude of adverse economic impacts a downwind turbine owner may sustain, particularly in terms of potential financial loss due to turbine spacing and location on a particular parcel. Second, inconsistency between jurisdictions may encourage developers to forum shop for the jurisdiction that has the most favorable laws, rules, and regulations, depending on whether their respective turbines will be located upwind or downwind of another developer's turbines in a particular location. A more preferable approach would be to adopt a more unified policy that encourages wind turbine construction on a site on which feasibility, environmental, and other suitability studies have been conducted, regardless of whether or not that site is upwind or downwind from an adjacent developer's wind farm site. Currently, the legal policies and regulations governing wind rights in a particular area influence how developers address wind flow over a particular parcel, wake effect, cumulative impact issues, turbine siting, wind lease negotiation, and constraints to wind farm development. Accordingly, determining the precedent and the most appropriate theoretical basis behind this framework is of paramount importance. Lessons learned from other countries' case law are instructive insofar as selecting the appropriate precedent and rationale on which a U.S. domestic legal framework for wind rights may be based. Because sunlight and wind access share common elements, this article advocates employing regulatory paradigms used to govern solar rights in Japan and Great Britain, in addition to elements of solar access laws from certain states domestically. Historical precedent illustrates that contemporary social factors and economic considerations play critical roles in shaping policy and impacting courts' rationales for determining ownership rights to access natural resources such as sunlight. Today, these same policy-shaping factors may impact wind rights allocation in this evolving area of law. This article proposes a new approach for determining wind rights by analogizing wind to sunlight, and by encouraging substantially impacted stakeholders and directly impacted communities to participate in the wind rights allocation process. This approach offers a springboard for formulating new legal policies and advancing the development of state, regional, and federal wind rights standards.
Book Synopsis Special Issue: Wind Turbine Wakes by : Gunner Larsen
Download or read book Special Issue: Wind Turbine Wakes written by Gunner Larsen and published by . This book was released on 2011 with total page 141 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Effects of Atmospheric and Wake Turbulence on Wind Turbines and Wind Turbine Wakes by : Thomas D. Farr
Download or read book The Effects of Atmospheric and Wake Turbulence on Wind Turbines and Wind Turbine Wakes written by Thomas D. Farr and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Wind Turbine Wake-Redirection Control at the Fishermen's Atlantic City Windfarm by :
Download or read book Wind Turbine Wake-Redirection Control at the Fishermen's Atlantic City Windfarm written by and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In this paper, we will present our work towards designing a control strategy to mitigate wind turbine wake effects by redirecting the wakes, specifically applied to the Fishermen's Atlantic City Windfarm (FACW), proposed for deployment off the shore of Atlantic City, New Jersey. As wind turbines extract energy from the air, they create low-speed wakes that extend behind them. Full wake recovery Full wake recovery to the undisturbed wind speed takes a significant distance. In a wind energy plant the wakes of upstream turbines may travel downstream to the next row of turbines, effectively subjecting them to lower wind speeds, meaning these waked turbines will produce less power.
Book Synopsis Directory of Southeast Asian studies centers in the United States, 1969 by :
Download or read book Directory of Southeast Asian studies centers in the United States, 1969 written by and published by . This book was released on with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Report written by P. E. J. Vermeulen and published by . This book was released on 1979 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Experimental Studies of Wind Turbine Wakes by : Davide Medici
Download or read book Experimental Studies of Wind Turbine Wakes written by Davide Medici and published by . This book was released on 2005 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Wind Turbine Wakes written by and published by . This book was released on 2015 with total page 2 pages. Available in PDF, EPUB and Kindle. Book excerpt: The total energy produced by a wind farm depends on the complex interaction of many wind turbines operating in proximity with the turbulent atmosphere. Sometimes, the unsteady forces associated with wind negatively influence power production, causing damage and increasing the cost of producing energy associated with wind power. Wakes and the motion of air generated by rotating blades need to be better understood. Predicting wakes and other wind forces could lead to more effective wind turbine designs and farm layouts, thereby reducing the cost of energy, allowing the United States to increase the installed capacity of wind energy. The Wind Energy Technologies Department at Sandia has collaborated with the University of Minnesota to simulate the interaction of multiple wind turbines. By combining the validated, large-eddy simulation code with Sandia's HPC capability, this consortium has improved its ability to predict unsteady forces and the electrical power generated by an array of wind turbines. The array of wind turbines simulated were specifically those at the Sandia Scaled Wind Farm Testbed (SWiFT) site which aided the design of new wind turbine blades being manufactured as part of the National Rotor Testbed project with the Department of Energy.
Book Synopsis Mixing of Simulated Wind Turbine Wakes in Turbulent Shear Flow by : P. E. J. Vermeulen
Download or read book Mixing of Simulated Wind Turbine Wakes in Turbulent Shear Flow written by P. E. J. Vermeulen and published by . This book was released on 1979 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Numerical Computations of Wind Turbine Wakes by : Stefan S. A. Ivanell
Download or read book Numerical Computations of Wind Turbine Wakes written by Stefan S. A. Ivanell and published by . This book was released on 2005 with total page 77 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Numerical Simulations of Wind Turbine Wakes by : Georgios Deskos
Download or read book Numerical Simulations of Wind Turbine Wakes written by Georgios Deskos and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Experimental and Theoretical Investigation of Wind Turbine Wakes in Arrays and Complex Terrain by : Donald Smith
Download or read book An Experimental and Theoretical Investigation of Wind Turbine Wakes in Arrays and Complex Terrain written by Donald Smith and published by . This book was released on 1991 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Numerical Study on Instability and Interaction of Wind Turbine Wakes by :
Download or read book Numerical Study on Instability and Interaction of Wind Turbine Wakes written by and published by . This book was released on 2014 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Large Scale Dynamics of Wind Turbine Wakes by : Juan José Trujillo
Download or read book Large Scale Dynamics of Wind Turbine Wakes written by Juan José Trujillo and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: