RT info:eu-repo/semantics/article
T1 Thermodynamic Analysis of Compressed Air Energy Storage (CAES) Reservoirs in Abandoned Mines Using Different Sealing Layers
A1 Álvarez de Prado, Laura
A1 Menéndez, Javier
A1 Bernardo Sánchez, Antonio
A1 Galdo Vega, Mónica
A1 Loredo Pérez, Jorge Luis
A1 Fernández Oro, Jesús Manuel
A2 Ingeniería CartograficaGeodesica y Fotogrametria
K1 Ingeniería de minas
K1 Abandoned Mines
K1 Underground Reservoirs
K1 Energy Storage
K1 Renewable Energy
K1 CAES
K1 Analytical Modelling
K1 Numerical Modelling
K1 Sealing Layer
K1 3318.01 Minería del Carbón
K1 3322.01 Distribución de la Energía
K1 3322.05 Fuentes no Convencionales de Energía
K1 5312.05 Energía
AB [EN] 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). In this paper, analytical and three-dimensional CFD numerical models have been conducted to analyze the thermodynamic performance of the A-CAES reservoirs in abandoned mines during air charging and discharging processes. Unlike other research works, in which the heat transfer coefficient is considered constant during the operation time, in the present investigation a correlation based on both unsteady Reynolds and Rayleigh numbers is employed for the heat transfer coefficient in this type of application. A tunnel with a 35 cm thick concrete lining, 200 m3 of useful volume and typical operating pressures from 5 to 8 MPa were considered. Fiber-reinforced plastic (FRP) and steel were employed as sealing layers in the simulations around the fluid. Finally, the model also considers a 2.5 m thick sandstone rock mass around the concrete lining. The results obtained show significant heat flux between the pressurized air and the sealing layer and between the sealing layer and concrete lining. However, no temperature fluctuation was observed in the rock mass. The air temperature fluctuations are reduced when steel sealing layer is employed. The thermal energy balance through the sealing layer for 30 cycles, considering air mass flow rates of 0.22 kg s−1 (charge) and −0.45 kg s−1 (discharge), reached 1056 and 907 kWh for FRP and steel, respectively. In general, good agreements between analytical and numerical simulations were obtained.
PB MDPI
LK https://hdl.handle.net/10612/19000
UL https://hdl.handle.net/10612/19000
NO Álvarez de Prado, L., Menéndez, J., Bernardo Sánchez, A., Galdo Vega, M., Loredo Pérez, J.L., & Fernández Oro, J. M. (2021). Thermodynamic analysis of compressed air energy storage (Caes) reservoirs in abandoned mines using different sealing layers. Applied Sciences (Switzerland), 11(6), 2573. https://doi.org/10.3390/APP11062573
DS BULERIA. Repositorio Institucional de la Universidad de León
RD Jul 7, 2024