Poster (Scientific congresses and symposiums)
Underground Pumped Storage Hydroelectricity (UPSH) using abandoned works
Pujades, Estanislao; Willems, Thibault; Orban, Philippe et al.
201542nd IAH International Congress, AQUA2015
 

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Keywords :
UPSH; Hydroelectricity; Energy Storage; Mine
Abstract :
[en] Underground Pumped Storage Hydroelectricity (UPSH) using abandoned works is an interesting alternative to increase the efficiency of some power plants, which cannot regulate the amount of electricity generated according to the demand. UPSH plants can store (pumping water from an underground to an upper reservoir) or produce energy (releasing water from an upper to an underground reservoir) during the low or high demand periods. Two considerations must be taken into account in order to construct an UPSH plant: 1) the alteration of the natural conditions of aquifers and 2), the efficiency of the plant, which depends on the hydraulic head inside the underground reservoir. Obviously, a detailed numerical model must be necessary to design a plant. However, a screening methodology to apply during the early stages of the design of a UPSH plant in order to reject the most disadvantageous sites in a short period of time would be useful. Groundwater flow impacts caused by UPSH plants are analyzed numerically and the main variables involved in the groundwater evolution are identified. The most noticeable effect consists in an oscillation of the groundwater. The hydraulic head around which groundwater oscillates, the magnitude of the oscillations and the time to achieve a pseudo-steady state (magnitude and head reached during oscillations do not vary anymore with time) depend on the boundaries, the parameters of the aquifer and the characteristics of the underground reservoir. From the numerical study, a screening methodology, which is based on existing analytical procedures (solutions for large diameter wells, methodologies for cyclic pumpings and the image well theory), is proposed to assess the main impacts caused in aquifers by UPSH plants and their efficiency regarding the groundwater evolution inside the reservoir. The procedure can be applied in a relatively short period of time and is useful to select those appropriate sites to construct a UPSH plant.
Research center :
Hydrogeology & Environmental Geology
Disciplines :
Geological, petroleum & mining engineering
Author, co-author :
Pujades, Estanislao ;  Université de Liège > Département ArGEnCo > Hydrogéologie & Géologie de l'environnement
Willems, Thibault ;  Université de Liège > Département ArGEnCo > Hydrogéologie & Géologie de l'environnement
Orban, Philippe  ;  Université de Liège > Département ArGEnCo > Hydrogéologie & Géologie de l'environnement
Dassargues, Alain  ;  Université de Liège > Département ArGEnCo > Hydrogéologie & Géologie de l'environnement
Language :
English
Title :
Underground Pumped Storage Hydroelectricity (UPSH) using abandoned works
Publication date :
17 September 2015
Event name :
42nd IAH International Congress, AQUA2015
Event organizer :
IAH Italian Chapter
Event place :
Rome, Italy
Event date :
from 13-09-2015 to 18-09-2015
Audience :
International
Funders :
ULg - University of Liège [BE]
EU - European Union [BE]
Funding text :
University of Liège and the EU through the Marie Curie BeIPD-COFUND postdoctoral fellowship programme (2014-2016) and SMARTWATER project financed by the Walloon Region SPW-DGO6
Available on ORBi :
since 21 September 2015

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