Turbulence to turbine wakes: challenges in the atmospheric science of wind energy - Julie Lundquist, University of Colorado Boulder
Julie Lundquist, Associate Professor, Department of of Atmospheric and Oceanic Sciences, University of Colorado Boulder; Courtesy Appointment, Dept. of Applied Mathematics; Fellow, Renewable and Sustainable Energy Institute, University of Colorado Boulder; Joint Appointee Scientist, National Renewable Energy Laboratory
Abstract: As the world moves away from fossil fuels and towards more renewably-generated electricity, interdisciplinary challenges become more prominent. In the wind energy arena, the nexus of atmospheric science and engineering offers several interesting areas of research. In this talk, I will survey some of the “Grand Challenges” of wind energy and delve into details of specific areas of my research.
At the most fundamental scale, the representations of atmospheric turbulence in numerical weather prediction models require revision, especially given that our simulation capabilities have outstripped some of the theoretical underpinnings. New observational approaches have let us measure the dissipation rate of turbulence kinetic energy in a broad range of circumstances so that we can document the inadequacies of current model parameterizations. I will present our observational methods and the variability of dissipation rate, and suggested machine-learning-based approaches for improving representation of dissipation rate in numerical weather prediction models.
At a larger spatial scale, an individual wind turbine will create a wake downwind. This wake region of slower wind will undermine power production of neighbouring turbines. The wake itself will vary with atmospheric conditions, and so predicting wake variability becomes critical for integrating large amounts of renewably-generated electricity into power grids. I will survey approaches for representing approaches for representing wakes in numerical weather prediction models and share some recent results regarding both onshore and offshore wind deployments.
About the Speaker: Prof. Lundquist leads an interdisciplinary research group in the Dept. of Atmospheric and Oceanic Sciences, University of Colorado, with a joint appointment at the National Renewable Energy Laboratory. Her research group uses observational and computational approaches to understand the atmospheric boundary layer, with emphasis on atmospheric influences on turbine productivity, turbine wake dynamics, and downwind impacts of wind energy. Before joining CU-Boulder, Dr. Lundquist designed and led wind energy projects at Lawrence Livermore National Laboratory. Her Ph.D. is in Astrophysical, Planetary, and Atmospheric Science from CU-Boulder, as is her M.S. degree. She studied English and Physics as an undergraduate at Trinity University, San Antonio, Texas. She has authored or co-authored over 100 refereed publications and over 200 conference presentations. Beyond wind energy, her current research projects include assessment of dissipation rate in the atmospheric boundary layer (NSF-CAREER), flow in complex terrain (NSF: Perdigão), and improving simulation capabilities for wildfire (DOI) and urban fires (OPP).