World Environmental and Water Resources Congress 2020
Water-Energy Storage Configuration for Generating Energy in Water Distribution Systems
Publication: World Environmental and Water Resources Congress 2020: Hydraulics, Waterways, and Water Distribution Systems Analysis
ABSTRACT
Minimizing or recovering excess energy is an important question for energy management in water distribution system (WDS). For a given network and topographical variations with system layouts, the recovering excess energy may provide better option. Comprehensive understanding of excess energy, which can be defined as the residual energy after the minimum pressure requirement met, is the basis of quantifying hydropower potential. Water-energy storage (i.e., pumped storage) which stores excess energy can maximize hydropower potential and can regulate energy distribution in system more uniformly and effectively. The topographic conditions, system demand, and capital cost may limit the number of water-energy storage to be installed. For a given system, how does the number of storage affect hydropower potential is the main focus of this study. Specifically, the objective of this study is to maximize hydropower generation considering three design parameters of water-energy storage: base elevation, maximum height, and diameter. A reference network, Net2 with slight modifications is used in this study. Results show that the average total hydropower generation increases with the increase of number of water-energy storage installed in the system (1,407 kWh for 1T and 1,469 kWh for 6T conditions). However, the rate of increase of hydropower generation reduces as the number of storages increase. More pipe flow and larger energy outflow from storage are observed under higher storage configurations (60 m3/s and 2,147 kWh under 1T and 109 m3/s and 2,577 kWh under 6T conditions) that show the potential use of WDS for energy storage.
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ACKNOWLEDGMENTS
This manuscript has been co-authored by employees of the California State University Fresno and Oak Ridge National Laboratory, managed by UT Battelle LLC. This research was supported in part by an appointment to the HERE program at Oak Ridge National Laboratory.
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Published In
World Environmental and Water Resources Congress 2020: Hydraulics, Waterways, and Water Distribution Systems Analysis
Pages: 412 - 420
Editors: Sajjad Ahmad, Ph.D., and Regan Murray, Ph.D.
ISBN (Online): 978-0-7844-8297-1
Copyright
© 2020 American Society of Civil Engineers.
History
Published online: May 14, 2020
Published in print: May 14, 2020
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