TechXplore September 23, 2020 A breeze as gentle as 1.6 m/s (3.6 mph) was enough to power the triboelectric nanogenerator designed by an international team of researchers (China, Singapore). The nanogenerator performs at its best when wind velocity is between 4 to 8 m/s (8.9 to 17.9 mph), a speed that allows the two plastic strips to flutter in sync.[see embedded video]. The device also has a high wind-to-energy conversion efficiency of 3.23%. Currently the device can power up 100 LED lights and temperature sensors. Unlike wind turbines, this device is made of low-cost materials and it can be safely […]
Tag Archives: Wind energy
New system uses wind turbines to defend the national grid from power cuts
EurekAlert June 19, 2020 Frequency control to raise frequency nadir and eliminate frequency second dip is highly desirable for power grids with high penetration of wind energy. In order to achieve similar frequency support performance and ensure stability of wind turbine systems (WTSs) under varying wind speeds, different levels of wind power penetration and system conditions, researchers in the UK propose a fast frequency support scheme, an adaptive gain which is a function of real-time rotor speed and wind power penetration level. Rotor speeds of WTSs are proposed not to be recovered to the optimal operating points during the primary […]
Grand challenges in the science of wind energy
Science Magazine October 25, 2019 Wind energy is already playing a role as a mainstream source of electricity, driven by decades of scientific discovery and technology development. An international team of researchers (USA – NERL, University of Colorado, UMASS Amherst, NOAA, Johns Hopkins University, University of Wyoming, Sandia National Laboratory, industry, Lawrence Berkeley National Laboratory, Denmark, Germany, Sweden, Finland, Spain, Norway) reviews the challenges and opportunities for further expanding wind technology, with an emphasis on the need for interdisciplinary collaboration. They identified three grand challenges in wind energy research that require further progress from the scientific community: (i) improved understanding […]