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Title: Trends, Opportunities, and Challenges for Tall Wind Turbine and Tower Technologies

Abstract

This presentation summarizes recent analysis focused on characterizing the opportunity for Tall Wind technologies generally and for tall tower technologies specifically. It seeks to illuminate and explain the concept of Tall Wind, its impact on the wind industry to date, and the potential value of Tall Wind in the future. It also explores the conditions and locations under which the impacts of Tall Wind offer the most significant potential to increase wind technology performance. In addition, it seeks to examine the status of tall tower technology as a key sub-component of Tall Wind, focusing on the potential for continued innovation in tubular steel wind turbine towers and the status and potential for a select set of alternative tall tower technologies.

Authors:
; ;
Publication Date:
Research Org.:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Wind and Water Technologies Office (EE-4W)
OSTI Identifier:
1369135
Report Number(s):
NREL/PR-6A20-68732
DOE Contract Number:
AC36-08GO28308
Resource Type:
Conference
Resource Relation:
Conference: Presented at the American Wind Energy Association's (AWEA) WINDPOWER 2017 Conference & Exhibition, 22-25 May 2017, Anaheim, California
Country of Publication:
United States
Language:
English
Subject:
17 WIND ENERGY; 29 ENERGY PLANNING, POLICY, AND ECONOMY; Tall Wind; tall towers; wind energy; renewable energy; wind technology; innovation

Citation Formats

Lantz, Eric, Roberts, Owen, and Dykes, Katherine. Trends, Opportunities, and Challenges for Tall Wind Turbine and Tower Technologies. United States: N. p., 2017. Web.
Lantz, Eric, Roberts, Owen, & Dykes, Katherine. Trends, Opportunities, and Challenges for Tall Wind Turbine and Tower Technologies. United States.
Lantz, Eric, Roberts, Owen, and Dykes, Katherine. Wed . "Trends, Opportunities, and Challenges for Tall Wind Turbine and Tower Technologies". United States. doi:. https://www.osti.gov/servlets/purl/1369135.
@article{osti_1369135,
title = {Trends, Opportunities, and Challenges for Tall Wind Turbine and Tower Technologies},
author = {Lantz, Eric and Roberts, Owen and Dykes, Katherine},
abstractNote = {This presentation summarizes recent analysis focused on characterizing the opportunity for Tall Wind technologies generally and for tall tower technologies specifically. It seeks to illuminate and explain the concept of Tall Wind, its impact on the wind industry to date, and the potential value of Tall Wind in the future. It also explores the conditions and locations under which the impacts of Tall Wind offer the most significant potential to increase wind technology performance. In addition, it seeks to examine the status of tall tower technology as a key sub-component of Tall Wind, focusing on the potential for continued innovation in tubular steel wind turbine towers and the status and potential for a select set of alternative tall tower technologies.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Jun 28 00:00:00 EDT 2017},
month = {Wed Jun 28 00:00:00 EDT 2017}
}

Conference:
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  • Wind energy is one of the least cost and environmentally attractive new electricity source options for many parts of the world. Because of new wind turbine technology, reduced costs, short installation time, and environmental benefits, countries all over the world are beginning to once again develop one of the world`s oldest energy technologies. A unique set of opportunities and challenges now faces the wind industry and its proponents. This paper discusses the potential and challenges of wind power. The US Department of Energy (DOE) is working closely with industry to develop new, improved wind turbine technology and to support bothmore » domestic and international deployment. The US DOE Wind Program is discussed within this context.« less
  • The objective of the study described in this report is to examine the nature of wind shear profiles and their variability over the height of large horizontal-axis wind turbines and to provide information on wind shear relevant to the design and opertion of large wind turbines. Wind turbine fatigue life and power quality are related through the forcing functions on the blade to the shapes of the wind shear profiles and their fluctuations over the disk of rotation.
  • Tall wind turbines, with hub heights at 80 m or above, can extract large amounts of energy from the atmosphere because they are likely to encounter higher wind speeds, but they face challenges given the complex nature of wind flow in the boundary layer. Depending on whether the boundary layer is stable, convective or neutral, mean wind speed (U) and turbulence ({sigma}{sub U}) may vary greatly across the tall turbine swept area (40 m to 120 m). This variation can cause a single turbine to produce difference amounts of power during time periods of identical hub height wind speeds. Themore » study examines the influence that atmospheric mixing or stability has on power output at a West Coast North American wind farm. They first examine the accuracy and applicability of two, relatively simple stability parameters, the wind shear-exponent, {alpha}, and the turbulence intensity, I{sub u}, against the physically-based, Obukhov length, L, to describe the wind speed and turbulence profiles in the rotor area. In general, the on-site stability parameters {alpha} and I{sub u} are in high agreement with the off-site, L stability scale parameter. Next, they divide the measurement period into five stability classes (strongly stable, stable, neutral, convective, and strongly convective) to discern stability-effects on power output. When only the mean wind speed profile is taken into account, the dependency of power output on boundary layer stability is only subtly apparent. When turbulence intensity I{sub u} is considered, the power generated for a given wind speed is twenty percent higher during strongly stable conditions than during strongly convective conditions as observed in the spring and summer seasons at this North American wind farm.« less