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An Exploratory Economic Analysis of Underground Pumped-Storage Hydro Power Plants in Abandoned Coal Mines

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  • Madlener, Reinhard

    () (E.ON Energy Research Center, Future Energy Consumer Needs and Behavior (FCN))

  • Specht, Jan Martin

    () (RWTH Aachen University)

Abstract

In Germany, the mitigation of CO2 emissions as well as the nuclear power phase-out are important political goals in the course of the sustainable energy transformation process (so-called “Energiewende”). The reduction in fossil- and nuclear-based energy supply has to be compensated by new renewable energies, especially wind power and photovoltaics. Most of the existing studies find that such an increasing contribution from volatile renewables calls for an intensified use of massive energy storage [1]. Conventional technologies for this purpose are pumped-storage hydro power (PSHP) facilities. Typically, these require a storage reservoir on top of a mountain and another one at the bottom. In Germany, unfortunately, suitable sites are quite rare and the constructional measures often have a negative impact on the landscape and the ecosphere, which often induces public resistance. A possible future solution might be the use of underground PSHP (UPSHP) plants, for example, in closed-down mines. This study constitutes an early attempt to model such plants, in order to assess and better understand the economic viability of such underground UPSHP power plants in closed down coal mines. First, we examine the topic from a technical perspective, which is followed by an economic analysis. In the technical assessment, we analyze the feasibility of building an underground reservoir, installing the pressure pipes in the main shaft and equipping the machine cavern with turbines and pumps. In the economic examination, the expected costs for building a UPSHP are calculated. A rough comparison between the costs of a classic and a UPSHP plant is made that also includes the costs of redesigning and reconstructing the underground reservoir. Based on the techno-economic evaluation, we conclude that under favorable conditions the realization of UPSHP plants seems both technically feasible and economically reasonable. More specifically, an extension of a tube system seems the most promising option. We also find that a PSHP plant in a mine shaft is probably slightly more expensive than a conventional one, an outcome that depends strongly on the feasible head. Also, the significant reduction of the adverse impacts on the landscape and local residents could be an advantage. In addition, the number of potential sites might be quite large compared to those for conventional PSHP plants.

Suggested Citation

  • Madlener, Reinhard & Specht, Jan Martin, 2013. "An Exploratory Economic Analysis of Underground Pumped-Storage Hydro Power Plants in Abandoned Coal Mines," FCN Working Papers 2/2013, E.ON Energy Research Center, Future Energy Consumer Needs and Behavior (FCN), revised Jul 2020.
  • Handle: RePEc:ris:fcnwpa:2013_002
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    Cited by:

    1. Javier Menéndez & Jesús M. Fernández-Oro & Mónica Galdo & Jorge Loredo, 2020. "Transient Simulation of Underground Pumped Storage Hydropower Plants Operating in Pumping Mode," Energies, MDPI, Open Access Journal, vol. 13(7), pages 1-17, April.
    2. Rohlfs, Wilko & Madlener, Reinhard, 2013. "Challenges in the Evaluation of Ultra-Long-Lived Projects: Risk Premia for Projects with Eternal Returns or Costs," FCN Working Papers 13/2013, E.ON Energy Research Center, Future Energy Consumer Needs and Behavior (FCN).
    3. Menéndez, Javier & Ordóñez, Almudena & Álvarez, Rodrigo & Loredo, Jorge, 2019. "Energy from closed mines: Underground energy storage and geothermal applications," Renewable and Sustainable Energy Reviews, Elsevier, vol. 108(C), pages 498-512.
    4. Pujades, Estanislao & Orban, Philippe & Bodeux, Sarah & Archambeau, Pierre & Erpicum, Sébastien & Dassargues, Alain, 2017. "Underground pumped storage hydropower plants using open pit mines: How do groundwater exchanges influence the efficiency?," Applied Energy, Elsevier, vol. 190(C), pages 135-146.
    5. Menéndez, Javier & Loredo, Jorge & Galdo, Mónica & Fernández-Oro, Jesús M., 2019. "Energy storage in underground coal mines in NW Spain: Assessment of an underground lower water reservoir and preliminary energy balance," Renewable Energy, Elsevier, vol. 134(C), pages 1381-1391.
    6. Anael Labigne & Olga N. Kononykhina & Irina V. Mersianova, 2015. "In Search Of Critical Capacity: Exploring Attitudes Of NPO Leaders In Russia," HSE Working papers WP BRP 59/SOC/2015, National Research University Higher School of Economics.
    7. Harmsen - van Hout, Marjolein & Ghosh, Gaurav & Madlener, Reinhard, 2013. "The Impact of Green Framing on Consumers’ Valuations of Energy-Saving Measures," FCN Working Papers 7/2013, E.ON Energy Research Center, Future Energy Consumer Needs and Behavior (FCN).
    8. Harmsen - van Hout, Marjolein & Ghosh, Gaurav & Madlener, Reinhard, 2013. "An Evaluation of Attribute Anchoring Bias in a Choice Experimental Setting," FCN Working Papers 6/2013, E.ON Energy Research Center, Future Energy Consumer Needs and Behavior (FCN).
    9. Menéndez, Javier & Fernández-Oro, Jesús M. & Galdo, Mónica & Loredo, Jorge, 2019. "Pumped-storage hydropower plants with underground reservoir: Influence of air pressure on the efficiency of the Francis turbine and energy production," Renewable Energy, Elsevier, vol. 143(C), pages 1427-1438.

    More about this item

    Keywords

    Hydro power; pumped storage; coal mining; reservoir engineering; massive energy storage;

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