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Fecha
2024-04-24
Derechos de acceso
info:eu-repo/semantics/openAccess
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Resumen
This work proposes a pumped thermal energy storage (PTES) integrated into the power block of a concentrated solar power plant. The power block operates under a Hybrid Rankine–Brayton (HRB) cycle using propane as the working fluid. During PTES charging, some thermal energy is obtained from a dedicated compressor (additional to that of the HRB cycle), which is stored. During discharge, both compressors (HRB and PTES) are off, restoring the consumed energy and resulting in about a 13% increase in nominal power output. The system is also able to store thermal energy that would otherwise be rejected through the condenser if the PTES were turned off, leading to efficiency improvements in some cases. Considering the 2022 Spanish electricity market prices, the proposed PTES integration with 4 h of storage is feasible. The levelized cost of storage is calculated and compared to those of other PTES systems, achieving around a 40% reduction compared with an equivalent PTES Rankine. These results encourage future studies where the proposed PTES could be integrated into other power cycles that include a recompression process.
Descripción
The registered version of this article, first published in “Energies, 17(9), 2005", is available online at the publisher's website: https://doi.org/10.3390/en17092005
La versión registrada de este artículo, publicado por primera vez en “Energies, 17(9), 2005", está disponible en línea en el sitio web del editor: https://doi.org/10.3390/en17092005
La versión registrada de este artículo, publicado por primera vez en “Energies, 17(9), 2005", está disponible en línea en el sitio web del editor: https://doi.org/10.3390/en17092005
Categorías UNESCO
Palabras clave
pumped thermal energy storage (PTES), concentrated solar power (CSP), economic analysis, recompression cycle, Brayton cycle, Rankine cycle
Citación
Subires, A. J., Rovira, A., & Muñoz, M. (2024). Proposal and Study of a Pumped Thermal Energy Storage to Improve the Economic Results of a Concentrated Solar Power That Works with a Hybrid Rankine–Brayton Propane Cycle. Energies, 17(9), 2005. https://doi.org/10.3390/en17092005
Centro
E.T.S. de Ingenieros Industriales
Departamento
Ingeniería Energética