Hybrid solar power plant with thermochemical energy storage: a multi-objective operational optimisation

Ruben Bravo, Carlos Ortiz, Ricardo Chacartegui, Daniel Friedrich

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

Energy storage is key to decarbonising the energy sector by reducing intermittency and increasing the integration of renewable energy. Thermochemical energy storage (TCES) integrated with concentrated solar and photovoltaic power
plants, has the potential to provide dispatchable and competitive energy. Here we develop a multi-objective optimisation framework to nd the best operational strategy of a hybrid solar power plant with a TCES system. The model uses
a typical meteorological year to optimise one-year hourly operation. The results demonstrate that the integration of a calcium-looping process as TCES in a concentrated solar power plant provides dispatchability and, when hybridised
with photovoltaic, enhances its competitiveness with current electricity prices. The low mismatch between supply and demand, even when a xed commitment is required throughout the year, together with a high overall eciency, indicates
that the integration of calcium-looping in hybrid solar power plants is an opportunity to increase the penetration of solar energy in the power sector. Through the optimisation framework presented, a seasonal energy storage analysis can be
developed, although a second optimisation stage is required to improve the sizing of the main components of the system in order to further reduce the energy costs.
Original languageEnglish
Article number112421
JournalEnergy Conversion and Management
Early online date30 Dec 2019
Publication statusPublished - Feb 2020

Keywords / Materials (for Non-textual outputs)

  • Calcium-looping
  • Thermochemical energy storage
  • Hybrid energy system
  • Concentrated solar power
  • photovoltaic (PV) systems
  • Multi-objective optimisation


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