The latest news about Wind Tower Technologies
AWARD OF MERIT IN THE PTI JOURNAL Read this recent article covering our Adams Precast Segmental Tower article for the Post Tensioning Institute Journal.
Download the PDF here: PTIJ-Project-Awards
Siemens Introduces Concrete Wind Tower Technology to Reduce Energy Costs
May 3, 2016
Siemens today announced the commercial launch of concrete wind turbine tower technology designed to capture stronger winds at higher altitudes, resulting in more potential energy production and increased project revenue for power producers. The technology is part of an effort to expand wind power in the United States.
Siemens partnered with Wind Tower Technologies in Colorado to develop engineering and construction methodologies. The patented tower system features onsite match casting of annular precast tower segments, eliminating the need to grout the joints or provide other special surface treatments between tower sections. Onsite casting of tower segments also eliminates transportation costs associated with offsite fabrication of tower sections.
“As wind continues to establish itself as a mainstream energy source in the United States, Siemens remains focused on driving down the cost of wind power projects,” said Michael McManus, Siemens Head of Business Development and Strategy for Onshore Americas. “By match casting tower segments onsite, we are able to simplify and streamline the entire tower construction process, reducing costs throughout.”
The precast segmental concrete tower system was designed to be scalable to heights of more than 375 feet using a modular formwork design. This offers up to an additional 10 percent annual energy production compared to typical 262-foot towers.
Siemens developed the concrete tower technology through prototype testing in Texas and Iowa. In a separate project, Siemens partnered with Iowa State University on the “Hexcrete Tower for Harvesting Wind Energy at Taller Hub Heights” project, sponsored by the Department of Energy Office of Energy Efficiency and Renewable Energy
Higher Wind Towers on the Rise
Post-tensioned segmental technology allows record heights and efficiencies
by James D. Lockwood, Matthew J. Chase, and Steven T. McRory
U.S. record high wind tower, with a hub height of 115 m (377 ft), was recently commissioned in Adams County, IA. The patented tower system was developed by Siemens Wind Power in partnership with Wind Tower Technologies (WTT) of Boulder, CO, using the precast segmental construction method. Precast segmental construction has proven to be highly competitive in the bridge industry on large viaducts—projects in which standardization is common. The new tower system is fabricated on site, eliminating the disruptions and costs inherent with transporting large steel tower sections over roads and bridges from remote locations to the project site. Using on-site concrete fabrication, the tower base diameter is nearly unrestricted, thereby allowing tower heights to be limited only by zoning permits and erection equipment.
According to Luis Carbonell, Civil Engineering Manager of Siemens, the segmental concrete technology provides their company an opportunity to introduce a new tower concept from the ground up that is aligned with the company’s market strategy.
The market size projection for utility-scale wind energy production in the United States is estimated to exceed 47 GW over the next 5 years, resulting in the projected installation of over 17,000 new towers in steel and concrete in this period. This creates a large opportunity for the concrete industry to compete in this growth market.
For the Full Article: 01 ACI-CI-August-2016-article-short