Ortiz Domínguez, CarlosChacartegui, RicardoValverde Millán, José ManuelCarro Paulete, AndrésTejada, C.Valverde García, Juan Sebastián2020-12-302020-12-302021-02Ortiz, C., Chacartegui, R., Valverde, J.M., Carro, A., Tejada, C. y Valverde, J.S. (2021). Increasing the solar share in combined cycles through thermochemical energy storage. Energy Conversion and Management, 229, Article 113730.0196-8904https://hdl.handle.net/11441/103414The integration of Concentrating Solar Power (CSP) in combined cycles is a subjects of increasing attention. Combined cycles require high temperature at the gas turbine inlet (typically over 1000 °C), which hinders plant operation in the absence of direct solar radiation using currently commercial storage technologies based on molten salts (with a temperature limit around 600 °C). Thus, solar power share in current Integrated Solar Combined Cycles (ISCC) is typically lower than 20%, while most of the thermal power required is provided by natural gas. The present manuscript proposes the integration in combined cycles of a Thermochemical Energy Storage (TCES) system based on the Calcium-Looping process, which can release the stored energy at temperatures above 1000 °C. The storage charging step uses the heat provided by a CO2 stream previously heated in a high-temperature solar receiver. The configuration of the solar receiver-calciner is fundamental to determine the amount of storable energy. Results from the conceptual model simulation predict overall plant efficiencies above 45% (excluding solar side losses), suggesting a high potential for the development of this novel integration that would allow enhancing the solar share in combined cycles.application/pdf13 p.engAttribution-NonCommercial-NoDerivatives 4.0 Internacionalhttp://creativecommons.org/licenses/by-nc-nd/4.0/Thermochemical energy storageDispatchabilitySolar energyCombined cycleCalcium-loopingCapacity factorinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/openAccesshttps://doi.org/10.1016/j.enconman.2020.113730