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You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) ALL CONTENT : Water engineering : Underground pumped-storage hydroelectricity using existing coal mining infrastructure
Underground pumped-storage hydroelectricity using existing coal mining infrastructure
Author : RODOLFO ALVARADO MONTERO(1), ANDR¨¦ NIEMANN(2) & TIMO WORTBERG(3)
ABSTRACT
The Ruhr region in Germany has been a highly exploited coal mining area for many decades and its network of tunnels
extend among more than 120 mines. Parts of this infrastructure will soon become available for alternative uses since
most of the coal mining facilities in Germany will fade out in 2018. By 2050 it is intended that the country produces 80%
of its energy from renewable sources, therefore replacing the energy based on coal and gas. One of the main challenges
for making this happen is the energy storage system, which creates a robust network that balances surplus and peaks of
energy demand over short coverage intervals. Pumped storage hydroelectricity has proved to be an effective solution for
this purpose.
The network of tunnels in Prosper-Haniel mine has been suggested as a possible lower storage for the development of
an underground pumped-storage project. This infrastructure can hold approximately 600.000 m3 at depths that range
between 600-1000 m. These conditions make it suitable to produce large amounts of energy for a short period of time,
therefore contributing to balance the energy grid.
This paper describes and analyses the hydraulic aspects of using the network of tunnels at Prosper-Haniel mine as a
lower storage volume for an underground pumped-storage system. Different operation conditions, i.e. cycles of turbine
and pumping modes, as well as wave propagation and hydraulic efficiency of the network are tested. Both construction
and operational recommendations are provided based under such analysis. Considering the above, the installed
capacity may vary from 200-350 MW for production cycles of at least 4 hours.
File Size : 390,898 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Water engineering
Date Published : 18/08/2015
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