Nick Fetty | September 19, 2014
The U.S. Department of Energy has awarded researchers at Iowa State University $1 million to study how high-strength concrete can be used to build taller wind turbines.
Sri Sritharan, the Wilson Engineering Professor in Civil, Construction and Environmental Engineering at Iowa State University, is the leader of the College of Engineering’s Wind Energy Initiative and expects this research to “revolutionize wind energy.” These taller towers will allow the turbines blades to reach heights of over 100 meters, where winds are faster and more consistent. This will be particularly beneficial in areas where higher winds are necessary to effectively harvest the energy.
This project will build upon earlier work by Sritharan and fellow researches. The team developed a strongly-reinforced base they called Hexcrete and found that it was able to handle the heavy loads and extreme conditions. The project is also supported by a $83,500 grant from the Iowa Energy Center and $22,500 from Lafarge North America Inc. of Calgary, Alberta, Canada.
The Wind Energy Initiative at Iowa State has eight projects that are being researched or have recently been completed including a project with the University of Colorado examining turbine-crop and turbine-turbine interactions.
The Department of Energy has also awarded another $1 million grant to Boston-based Keystone Towers which which hopes to develop an on-site “spiral welding system” to develop wind turbine towers that are expected to be 40% lighter.