An Exploratory Economic Analysis of Underground Pumped-Storage
This study researches the concept of underground pumped-storage hydro power plants in closed-down underground hard coal mines in Germany. After a review on how this could be realized technically, an economic feasibility analysis is presented, with a particular focus on the costs for the underground storage reservoir.
Energies | Free Full-Text | Underground Pumped-Storage
Underground pumped storage hydropower (UPSH) has recently gained popularity as a viable alternative and may utilize abandoned mines for the construction of the lower reservoir in the underground. Such underground mines may have complex geometries and the injection/pumping of large volumes of water with high discharge could
(PDF) Study on Complexity Planning Model of Pumped Storage
The repurposing of abandoned open-pit coal mines into pumped storage hydropower (PSH) can help with the storage of renewable energy, improve mine
Preliminary design of an underground reservoir for pumped storage
Acres International Corporation (1993), Summit Hydroelectric Pumped Storage Project, Report on Investigations from the Mine.Vols. 1 & 2. Report prepared for Summit Energy Storage Inc. Baker, W. J. (1955), Flow in Fissured Formation, Proceedings, 4th World Petroleum Congress, Rome. Broch, E. (1982), Designing and Excavating Underground
Pumped-storage hydroelectricity
A pumped-storage hydroelectricity generally consists of two water reservoirs at different heights, connected with each other. At times of low electrical demand, excess generation capacity is used to pump water into the upper reservoir. When there is higher demand, water is released back into the lower reservoir through a turbine, generating
Water storage in reservoirs built from 1997 to 2014 significantly altered the calculated evapotranspiration trends over China
Generally, regional mean ET values can be calculated from the following terrestrial water budget equation: (1) where P is the precipitation, R is the runoff, and Δ S is the change in terrestrial water storage.
Estimation of water storage capacity of Chinese reservoirs by
Results show that among the four statistical models and six ML models, the ML model using the extreme-gradient-boosting-tree (XGBoost) algorithm performs best in capacity prediction with a correlation coefficient of 0.97, a Nash-Sutcliffe efficiency of 0.95, and a mean absolute percentage error of 22.93 %.
Obstacle identification for the development of pumped hydro storage using abandoned
During energy storage, it uses excess power from the power grid or wind and light energy to drive pumps to pump water from the lower reservoir to the upper reservoir. During peak electricity consumption, water from the upper reservoir is discharged to the lower reservoir, converting the potential energy of the water into
Energy storage in underground coal mines in NW Spain
Lately, a replicable methodology has been proposed and applied to the Italian territory to calculate the underground pumped hydro storage potential [30]. 2. Materials and methods2.1. Study area. The ACCB is located in Asturias (NW Spain). During the last decades it has been an exploited coal mining area by means of underground
The Ultimate Guide to Mastering Pumped Hydro Energy
The potential energy stored in a pumped hydro storage system can be calculated using the formula: Potential energy (MWh) = Volume of water (m³) × height difference (m) × gravitational acceleration (9.81 m/s²) × water density (1000 kg/m³) × efficiency / 3,600,000.
(PDF) Pumped storage hydropower in an abandoned open-pit
A natural lake, dumps, and another open-pit mine are envisaged as the upper reservoir, which could bring 40, 3,200, and 2,000 MW electricity installed capacity, and −295 m, −200 m, and −150
Underground space utilization of coalmines in China: A review of underground water reservoir construction
The basic characteristics of China''s energy storage are lean oil, low gas, and relatively rich coal and coal has dominated China''s energy production and consumption structure. China''s energy consumption structure over the past 10 years is shown in Fig. 1 (Ministry of Natural Resources, 2019).).
Stochastic day-ahead scheduling of irrigation system integrated
Pumped storage turbine: The water in the upper reservoir of the pumped storage comes from the river, and the lower reservoir provides the water demand for irrigation system. The generation coefficients of the pumped storage turbine are a PS = −0.033 M W h 2 / (H m 3) 2, b PS = 5 MWh/Hm 3 and c PS = 0 MW.
(PDF) An Exploratory Economic Analysis of Underground Pumped-Storage Hydro Power Plants in Abandoned
the water uphill in the case of electric surplus capacity, it is pumped from an underground storage, for example, at the bottom of an abandoned mine, up to the surface. If additional electricity
Study on Complexity Planning Model of Pumped Storage in Abandoned
The single-pit oil–water co-storage mode mainly involves water and oil reservoirs in open pits, including water reservoirs, isolated filled soil layers, oil reservoirs, and base layers from top to bottom (as shown in Figure 3). The following aspects need to be considered in this mode: 1) The foundation of the abandoned open-pit mine should be
MicroPSCal: A MicroStation package for storage calculation of pumped storage
A toolkit MicroPSCal is developed based on MicroStation software to simulate and calculate the corresponding storage capacity of different elevations and draw the storage capacity curve, which can be applied in the actual planning and design process of pumped storage power stations.
Stability analysis of pumped storage hydropower plant in abandoned
The construction of a pumped storage hydropower plant (PSHP) in an abandoned open-pit mine is a potential alternative to green mining and energy storage, which can increase the utilization rate of renewable energy and develop residual resources of abandoned mines. Dynamic surface subsidence affected by combined underground
Regulation storage calculation and capacity evaluation of the
For the confined layer, the storage calculation of the underground reservoir includes two parts. One is the volume of the gravity water stored in the pore space of the aquifer, and the other is the volume of the elastic storage water when the pressure water level is higher than the top of the aquifer, as shown in Fig. 5.
Site selection for underground pumped storage plant using abandoned
Different from the traditional pumped storage, the lower reservoirs of UPSP-ACM is constructed based on goafs or tunnels of ACM [1]. The conventional distance formula has logical problems Conference Underground pumped-storage hydro power plants with mine water in abandoned coal mines, vol. 1. p. 6-13. Google Scholar [18]
A review of pumped hydro energy storage
About two thirds of net global annual power capacity additions are solar and wind. Pumped hydro energy storage (PHES) comprises about 96% of global storage power capacity and 99% of global storage energy volume. Batteries occupy most of the balance of the electricity storage market including utility, home and electric vehicle
(PDF) Study on Complexity Planning Model of Pumped Storage in Abandoned
The reconstruction of Pumped Hydraulic Energy Storage systems (PHES) from abandoned open-pit mines is an effective utilization mode of the abandoned underground space in recent years.
Thermal stratification characteristics and cooling water shortage risks for pumped storage reservoir
1. Introduction The mitigation of climate change via greenhouse gas (GHG) emission reductions has become a mission-critical task for many governments worldwide [1, 2].Hydropower, as the world''s largest renewable energy source [[3], [4], [5]], is a widely exploited means to provide zero-carbon electricity generation, accounting for
Analytical method for estimating leakage of reservoir basins for
Formulae are derived to calculate the seepage flux of the reservoir basin with different groundwater levels, which can be below or above the bottom of the reservoir
Hydropower
Example - Hydro-power. The theoretically power available from a flow of 1 m 3 /s water with a fall of 100 m can be calculated as. P = (1000 kg/m 3) (1 m 3 /s) (9.81 m/s 2) (100 m) = 981 000 W = 981 kW Efficiency. Due to
(PDF) Numerical modelling of water subsurface reservoirs during the operation phase in underground pumped storage
Currently, a total of 32 underground coal mine reservoirs have been built with a water storage capacity of 31 million m 3, the only underground coal mine reservoir group in the world [10]. In
Thermodynamic Analysis of Compressed Air Energy
Million cubic meters from abandoned mines worldwide could be used as subsurface reservoirs for large scale energy storage systems, such as adiabatic compressed air energy storage (A-CAES).
SECTION 3: PUMPED-HYDRO ENERGY STORAGE
K. Webb ESE 471 5 Pumped-Hydro Energy Storage Potential energy storage in elevated mass is the basis for pumped-hydro energy storage (PHES) Energy used to pump water from a lower reservoir to an upper reservoir Electrical energy input to motors
Site selection for underground pumped storage plant using abandoned
Different from the traditional pumped storage, the lower reservoirs of UPSP-ACM is constructed based on goafs or tunnels of ACM [1]. Conference Underground pumped-storage hydro power plants with mine water in abandoned coal mines, vol. 1. p. 6-13. [18]
Different design techniques in determining reservoir capacity
By using the mass curve method, the reservoir capacity is calculated as the next steps: 1- For the proposed dam site, construct a mass curve of the historical stream flows (annual
How to estimate the capacity of reservoir
The storage of the reservoir is obtained by the following formula, Storage capacity of reservoir = average demand of water x peak factor -minimum supply of water at that duration. = Peak demand of water- minimum supply at that duration. Q. Determine the capacity of the distribution reservoir, if the pump installed can supply the water in the
How do planners determine the required size for a pumped storage
The value of pumped storage comes from the added flexibility of operations, and the value of reservoir storage can be calculated using the value water method, valuing the opportunity of storing
Distribution of heavy metals influenced by pumped storage
As shown in Fig. 5 (a–c), pumping contaminated water from the underground reservoir of the pumped storage hydropower plant once a day had little impact on the concentrations of Zn 2+, Pb 2+, Cr 5+, Cu 2+, and As 3+ in the Huaihe River. In each hydrological year, the concentration of heavy metals at the confluence of the Nihe
Quantitative Evaluation Method for Gas Loss in Underground Natural Gas Storage Reconstructed from Abandoned Gas Reservoirs
In gas storage that is converted from a water-containing gas reservoir or a gas-cap oil reservoir, the oil and water in the gas–water transition zone and the gas-oil transition zone are both undersaturated due to the influence of gas reser
Study on Complexity Planning Model of Pumped Storage in Abandoned
4 Multi-Scene Utilization Mode of PHES in Abandoned Mine According to the situation of Fushun abandoned open-pit mine, the PHES in Fushun can be divided into four modes, namely, the single-pit oil–water co-storage mode, single-pit gravity dam reinforcement
Beyond peak reservoir storage? A global estimate of declining water
[9] According to reservoir data extracted from the GRanD database, the construction of reservoirs peaked in the 1960s and 1970s when about 150 km 3 of storage capacity in 130 reservoirs were added per year. The growth has since slowed down to about 15 km 3 per year in eight reservoirs for the last decade (2001–2010). The average
Underground space utilization of coalmines in China: A review of
There are three underground space utilization modes based on UWRs: storage and filtration of mine water, pumped hydroelectric storage plants system and
Study on Complexity Planning Model of Pumped Storage in Abandoned
The west open-pit mine is located in the west of Fushun, the south of Hun River. The mine is 6.6 km long from east to west and 2 km wide from north to south, with a mining vertical depth of 388 m
Stability analysis of the underground infrastructure for pumped storage hydropower
Pumped Storage Hydropower (PSH) is the most mature and widely used technology for large-scale energy storage. It accounts for 99% of the current storage capacity. The efficiency of the pumped hydro systems (i.e. energy output to energy absorbed for pumping) is between 70% and 80% ( Schoenung et al., 1996, Ibrahim et al.,
