scholarly journals Hydrodynamical and Hydrochemical Assessment of Pumped-Storage Hydropower (PSH) Using an Open Pit: The Case of Obourg Chalk Quarry in Belgium

2021 ◽  
Vol 11 (11) ◽  
pp. 4913
Author(s):  
Angélique Poulain ◽  
Estanislao Pujades ◽  
Pascal Goderniaux
Keyword(s):  
Environmental Impacts ◽  
Supply And Demand ◽  
Electrical Energy ◽  
Hydraulic Head ◽  
Surrounding Rock ◽  
Open Pit ◽  
Water Chemical Composition ◽  
Lower Reservoir ◽  
Pumped Storage ◽  
Adjacent Rock

Pumped storage hydropower (PSH) enables the temporary storage of energy, including from intermittent renewable sources, and provides answers to the difficulties related to the mismatch between supply and demand of electrical energy over time. Implementing a PSH station requires two reservoirs at different elevations and with large volumes of water. The idea of using old, flooded open-pit quarries as a lower reservoir has recently emerged. However, quarries cannot be considered as impervious reservoirs, and they are connected to the surrounding aquifers. As a result, PSH activities may entail environmental impacts. The alternation of the pumping–discharge cycles generates rapid and periodic hydraulic head fluctuations in the quarry, which propagate into the surrounding rock media forcing the exchange of water and inducing the aeration of groundwater. This aeration can destabilize the chemical balances between groundwater and minerals in the underground rock media. In this study, two numerical groundwater models based on the chalk quarry of Obourg (Belgium) were developed considering realistic pumping–discharge scenarios. The aim of these models was to investigate the hydrodynamic and hydrochemical impact of PSH activities on water inside the quarry and in the surrounding rock media. Results showed that (1) water exchanges between the quarry and the adjacent rock media have a significant influence on the hydraulic head, (2) the frequency of the pump–discharge scenarios influence the potential environmental impacts, and (3), in the case of chalk formations, the expected impact of PSH on the water chemical composition is relatively limited around the quarry. Results highlight that those hydrogeological and hydrochemical concerns should be assessed when developing a project of a PSH installation using a quarry as a lower reservoir, considering all particularities of the proposed sites.

scholarly journals A Multiobjective Robust Scheduling Optimization Mode for Multienergy Hybrid System Integrated by Wind Power, Solar Photovoltaic Power, and Pumped Storage Power

2017 ◽  
Vol 2017 ◽  
pp. 1-15 ◽  
Author(s):  
Lihui Zhang ◽  
He Xin ◽  
Jing Wu ◽  
Liwei Ju ◽  
Zhongfu Tan
Keyword(s):  
Wind Power ◽  
Hybrid System ◽  
Supply And Demand ◽  
Stochastic Theory ◽  
Stochastic Scheduling ◽  
Economic Benefits ◽  
Load Curve ◽  
Scheduling Optimization ◽  
Pumped Storage ◽  
Photovoltaic Generators

Wind power plant (WPP), photovoltaic generators (PV), cell-gas turbine (CGT), and pumped storage power station (PHSP) are integrated into multienergy hybrid system (MEHS). Firstly, this paper presents MEHS structure and constructs a scheduling model with the objective functions of maximum economic benefit and minimum power output fluctuation. Secondly, in order to relieve the uncertainty influence of WPP and PV on system, robust stochastic theory is introduced to describe uncertainty and propose a multiobjective stochastic scheduling optimization mode by transforming constraint conditions with uncertain variables. Finally, a 9.6 MW WPP, a 6.5 MW PV, three CGT units, and an upper reservoir with 10 MW·h equivalent capacity are chosen as simulation system. The results show MEHS system can achieve the best operation result by using the multienergy hybrid generation characteristic. PHSP could shave peak and fill valley of load curve by optimizing pumping storage and inflowing generating behaviors based on the load supply and demand status and the available power of WPP and PV. Robust coefficients can relieve the uncertainty of WPP and PV and provide flexible scheduling decision tools for decision-makers with different risk attitudes by setting different robust coefficients, which could maximize economic benefits and minimize operation risks at the same time.

scholarly journals Detection of Overhead Contact Lines with a 2D-Digital-Beamforming Radar System for Automatic Guidance of Trolley Trucks

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
Marlene Harter ◽  
Tom Schipper ◽  
Lukasz Zwirello ◽  
Andreas Ziroff ◽  
Thomas Zwick
Keyword(s):  
Electrical Energy ◽  
Two Dimensions ◽  
Radar System ◽  
Open Pit ◽  
Open Pit Mining ◽  
Maximum Speed ◽  
Contact Lines ◽  
Digital Beamforming ◽  
Mining Sites ◽  
Automatic Guidance

The benefit of trolley truck systems is the substitution of the diesel fuel by the cheaper and more ecological electrical energy. Trolley trucks are powered by electricity from two overhead contact lines, where one is the supply and the other the return conductor. Such trolley trucks are used for haulage at open pit mining sites but could also be used for freight traffic at roadways in the future. Automatic guidance prevents the trolley-powered trucks from leaving the track and thus allows higher operating speeds, higher loading capacity, and greater efficiency. Radar is the ideal sensing technique for automatic guidance in such environments. The presented radar system with two-dimensional digital beamforming capability offers a compact measurement solution as it can be installed on top of the truck. Besides the distance measurement, this radar system allows to detect the location and inclination of the overhead contact lines by digital beamforming in two dimensions. Besides automatic guidance, the knowledge of the inclination of the overhead contact lines could allow automatic speed adaption, which would help to achieve maximum speed especially in hilly terrain.

Stability and Deformation Analysis for Excavation and Backfilling of Fushun West Open-Pit Coal Mine

2013 ◽  
Vol 353-356 ◽  
pp. 751-755 ◽  
Author(s):  
Yong Cheng Yan ◽  
Xian Zhang Ling ◽  
Feng Zhang ◽  
Jia Hui Wang
Keyword(s):  
Coal Mine ◽  
Slip Surface ◽  
Surrounding Rock ◽  
Open Pit ◽  
Deformation Analysis ◽  
Interface Model ◽  
Safety Coefficient ◽  
Mine Slope ◽  
The Stability ◽  
Technical Basis

Taking section W400 of Fushun west open-pit coal mine for the research, the interface model of fracture zone and surrounding rock was established. FLAC3D is used to analysis the influence of excavation and backfill of open-fit coal mine to the slope stability and deformation. The numerical results and analysis show that: (1) when the open-pit coal mine slope is excavated to final production line, the safety coefficient is 2.98, with the excavation, the deformation of the Fushun No.1 Refinery Factory area increases. (2) With the increase of backfilling, the slope coefficient increases to 3.32, this will reduce the deformation of the Fushun No.1 Refinery Factory area. Furthermore, the positions of the dangerous slip surface and serious deformation part of factory area should be regards as key areas. These conclusions could provide technical basis for the stability analysis of Fushun west open-pit coal mine.

Simulation of electricity production in a remote island for optimal management of a hybrid renewable energy system

2020 ◽  
Author(s):  
Konstantinos Karkanis ◽  
Ioannis Vatsikouridis ◽  
Theano Iliopoulou ◽  
Panayiotis Dimitriadis ◽  
Demetris Koutsogiannis ◽  
...  
Keyword(s):  
Electrical Energy ◽  
Energy System ◽  
Electricity Production ◽  
Stochastic Methods ◽  
Storage Unit ◽  
Hybrid Renewable Energy System ◽  
Marine Energy ◽  
Remote Island ◽  
Pumped Storage ◽  
Electrical Energy Production

<p>We simulate the electrical energy production in the remote island of Astypalaia, Greece. Solar, wind, hydropower, biomass and marine energy are used for the energy mix. The hypothetical energy system has also the ability to store energy through a pumped-storage unit. We use available data at various time scales. The aim of this work is to optimize the energy management of the hypothetical system studied.</p><p>Acknowledgement: This research is conducted within the frame of the undergraduate course "Stochastic Methods" of the National Technical University of Athens (NTUA). The School of Civil Engineering of NTUA provided moral support for the participation of the students in the Assembly.</p><p> </p>

Study on the Relationship between Ergometer and Tensioning Force of Pre-Stressed Pier Anchor Cable

2013 ◽  
Vol 353-356 ◽  
pp. 2822-2826
Author(s):  
Jun Xing ◽  
Zhi Xin Fan
Keyword(s):  
Stable Operation ◽  
Indicator Values ◽  
Power Station ◽  
Anchor Cable ◽  
Lower Reservoir ◽  
The Difference ◽  
Pumped Storage ◽  
The Relationship

During the construction of pre-stressed anchor cables for discharging flood and sand in the lower reservoir of Pushihe Pumped-storage Power Station, the tensioning of main and secondary cables are overall carried out according to design, in which the tensioning force is divided into seventh grades, the indicator values of ergometer and tensioning force of jack were obtained by experiment, and the difference between them were compared and analysis, the results of experiment provides the basis for the long-term and stable operation of pre-stressed pier in Pushihe project.

scholarly journals New Design of Quarry Gravitricity

2020 ◽  
Vol 1 (1) ◽  
Author(s):  
Samir REMLI ◽  
Djouama MOHAMED ◽  
Benselhoub AISSA ◽  
Rachid KHEBBAB ◽  
Nacereddine FELLOUH
Keyword(s):  
Third World ◽  
Electric Energy ◽  
Electrical Energy ◽  
The Other ◽  
Open Pit ◽  
Open Pit Mines ◽  
Environmental Consequences ◽  
The Third ◽  
The World ◽  
The Third World

The consumption of electric energy in open pit mines or quarries maybe can achieve the consumption of all inhabitants of a city which it is according to their size and production of ore. in the other hand, View that the demand crescent of energy electric in the world, the limits of energetic resources in the third world, the increase of prizes operation and the maintenance of classic energy, the environmental consequences of classic energy and the benefic for using the autonomy system for production of electricity incites for searching the other sources responds the demands, To do this, we propose in this work a system equipped by generator for the creation of electrical energy resulting from the traffic of trucks in open pit mines whom situated in mountainous reliefs as knows a new kind of gravitricity.

Modelling the Effect of the Hydroelectric Pumped Storage Plant on Hydrodynamic Regime of the Kaunas Reservoir In Lithuania

2003 ◽  
Vol 34 (5) ◽  
pp. 507-518 ◽  
Author(s):  
Brunonas Gailiusis ◽  
Jurate Kriauciuniene ◽  
Erika Rimaviciute
Keyword(s):  
Power Plant ◽  
Hydroelectric Plant ◽  
Optimal Number ◽  
Water Levels ◽  
Level Fluctuation ◽  
Simultaneous Operation ◽  
Lower Reservoir ◽  
Pumped Storage ◽  
Installed Capacity ◽  
The Impact

The Kaunas Reservoir was formed during construction of the Kaunas Hydroelectric Plant (Kaunas HP) on the Nemunas River in 1960. Since 1992 it has also been serving as a lower reservoir for the Kruonis Hydroelectric Pumped-Storage Plant (Kruonis HPP), which currently has four generating units with 200 MW of installed capacity each. There are plans to increase the capacity of this power plant by constructing additional four generating units. Operation of the Kruonis HPP is already changing the hydrophysical regime (water levels and flow velocities) of the Kaunas Reservoir and new units can seriously aggravate the situation by inducing bottom erosion. The objective of this study is to determine the optimal number of generating units so that the impact of the Kruonis HPP on the hydrophysical regime of the reservoir would be acceptable. The hydrodynamic model MIKE 21 was used to calculate the flow velocity and water level fluctuation in the Kaunas reservoir for different number of the Kruonis HPP generating units. The Kaunas HP was considered as operating with minimal load or under conditions equivalent to a big flood (2,000 m3/s). The modelling results indicate that the impact of four units is acceptable while simultaneous operation of the eight units at Kruonis HPP would not be desirable.

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