Stability analysis of the underground infrastructure for pumped storage hydropower plants in closed coal mines

Menéndez, J.Á.; Schmidt, Falko; Konietzky, Heinz; Oro, Jesús Manuel Fernández; Galdo, Mónica; Loredo, Jorge; Díaz-Aguado, María B.

doi:10.1016/j.tust.2019.103117

Cited by 40 publications

(20 citation statements)

References 16 publications

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“…Energy storage in PHSP can reduce the use of thermal power plants to meet peak demand [28], consequently reducing the use of fossil fuels and the associated emission of greenhouse gases (GHG) and other pollutants. In addition, PHSPs are considered strategic for the best use and integration of variable renewable energy sources (VRE), especially solar and wind [20,25,38,50,51,[56][57][58][59][60][61]. This type of intermittent source must be used when available, or converted to another type of energy so that it can be stored and used later [62].…”

Section: Benefits and Advantages Of Phspmentioning

confidence: 99%

“…Besides this advantage, Menéndez et al [92] claim that UPHSP are less impacting than conventional PHSP, because of the reduction in interventions on the surface environment (due to the lack of a lower surface reservoir), although it can influence the underground environment and groundwater. Menéndez et al [59,93] also claim that the use of abandoned mines as a lower reservoir can minimize impacts and increase the benefits of UPHSP, since the impacts of mine construction have already occurred.…”

Section: Underground Phspmentioning

confidence: 99%

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Pumped hydro storage plants: a review

Vilanova

Flores

Balestieri

2020

J Braz. Soc. Mech. Sci. Eng.

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Pumped hydro storage plants (PHSP) are considered the most mature large-scale energy storage technology. Although Brazil stands out worldwide in terms of hydroelectric power generation, the use of PHSP in the country is practically nonexistent. Considering the advancement of variable renewable sources in the Brazilian electrical mix, and the need to provide flexibility to the national electrical system, several official documents cite PHSP as an important alternative for the expansion of the Brazilian electrical system. This article presents the state of the art of PHSP and its use, in order to create a theoretical basis for future research on the subject, also providing theoretical support for Brazilian energy planning. The review includes a global panorama on the use of PHSP in the world, the technical and projective foundations on this type of technology, its benefits, and disadvantages, in addition to the new configurations and possible layouts for the construction of pumped hydro storage plants. Finally, the challenges and trends for the dissemination of PHSP technology are addressed.

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Section: Benefits and Advantages Of Phspmentioning

confidence: 99%

Section: Underground Phspmentioning

confidence: 99%

Pumped hydro storage plants: a review

Vilanova

Flores

Balestieri

2020

J Braz. Soc. Mech. Sci. Eng.

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“…Later, during high demand periods, electricity is produced by discharging the water through turbines from the upper to the lower reservoir [11]. Despite its extensive use, PSH has limitations [12][13][14], the most important being that a specific topography is required as both reservoirs must be located at different elevations [15]. Consequently, PSH plants can only be installed in relatively steep areas [16].…”

Section: Introductionmentioning

confidence: 99%

The Impact of Hydrogeological Features on the Performance of Underground Pumped-Storage Hydropower (UPSH)

et al. 2021

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Underground pumped storage hydropower (UPSH) is an attractive opportunity to manage the production of electricity from renewable energy sources in flat regions, which will contribute to the expansion of their use and, thus, to mitigating the emissions of greenhouse gasses (GHGs) in the atmosphere. A logical option to construct future UPSH plants consists of taking advantage of existing underground cavities excavated with mining purposes. However, mines are not waterproofed, and there will be an underground water exchange between the surrounding geological medium and the UPSH plants, which can impact their efficiency and the quality of nearby water bodies. Underground water exchanges depend on hydrogeological features, such as the hydrogeological properties and the groundwater characteristics and behavior. In this paper, we numerically investigated how the hydraulic conductivity (K) of the surrounding underground medium and the elevation of the piezometric head determined the underground water exchanges and their associated consequences. The results indicated that the efficiency and environmental impacts on surface water bodies became worse in transmissive geological media with a high elevation of the piezometric head. However, the expected environmental impacts on the underground medium increased as the piezometric head became deeper. This assessment complements previous ones developed in the same field and contributes to the definition of (1) screening strategies for selecting the best places to construct future UPSH plants and (2) design criteria to improve their efficiency and minimize their impacts.

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“…Because the ventilation can increase the generated energy up to 12.5%. Menéndez et al 14,15 have also analyzed the efficiency of UPHES power plant depending on the operating pressure. Pujades et al 16 have researched the use of abandoned mines for UPHES power plant and emphasized that water leakage should be taken into consideration.…”

Section: Introductionmentioning

confidence: 99%

Development and assessment of geothermal‐based underground pumped hydroenergy storage system integrated with organic Rankine cycle and district heating

Erdemir

2020

Int J Energy Res

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This study develops a geothermal-based underground pumped hydroenergy storage system (UPHES) integrated with an organic Rankine cycle (ORC) and district heating. The ORC has been integrated into the system for contributing the power demand of the pump used during the charging period to pump the water from the underground to the upper reservoir. District heating has been performed by geothermal. Heat recovered from the ORC has been used for the preheating of water used in district heating before entering the upper reservoir. With this proposed integrated system, both the peak energy demand has been shifted to off-peak hours and district heating has been performed. An ORC has also been included in the system to contribute to the energy demand of the UPHES pump. In order to evaluate the system's performance, thermodynamic analysis has been performed base on energetic and exergetic efficiencies. In the base case study, 60 MWh of electricity has stored by the UPHES. Also, a 2.8 MW of heating demand of 100 houses has been met and a 1.7 MW of power has been generated by the ORC. The power of the UPHES pump has been calculated as 6.81 MW. The efficiency of the UPHES system is 73.34%. Overall energy and exergy efficiencies of the proposed integrated system have been calculated as 93.09% and 78.37%, respectively.

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Stability analysis of the underground infrastructure for pumped storage hydropower plants in closed coal mines

Cited by 40 publications

References 16 publications

Pumped hydro storage plants: a review

Pumped hydro storage plants: a review

The Impact of Hydrogeological Features on the Performance of Underground Pumped-Storage Hydropower (UPSH)

Development and assessment of geothermal‐based underground pumped hydroenergy storage system integrated with organic Rankine cycle and district heating

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