120012 20240319081002.0 doi 10.1016/j.est.2022.105771 sideral 130842 ART-2022-130842 eng Pascual, S. Universidad de Zaragoza Operation maps in calcium looping thermochemical energy storage for concentrating solar power plants 2022 Access copy available to the general public Unrestricted Calcium Looping (CaL) process used as thermochemical energy storage system in concentrating solar plants has been extensively investigated in the last decade and the first large-scale pilot plants are now under construction. Existing research focuses on improving global efficiencies under steady-state and single modes of operation: energy storage or energy retrieval. However, TCES systems will operate under different operation points to adapt the load of its reactors to the solar availability and the energy demand from the power cycle. A thorough analysis of the operation modes provides an extremely large number of potential situations to operate the system. In this study, operation maps which maximize thermal energy availability and energy storage efficiency are defined. Furthermore, a novel approach for the management of partially carbonated solids is examined to reduce the circulation of inert material in the system based on preliminary experimental results which allows for a partial separation of carbonated solids. Two threshold scenarios are analysed: (i) no solids separation as considered in most CaL TCES studies and (ii) ideal total solids separation. The aims of this work are to set methodological criteria to define the optimal operation map and to assess the effect of partially carbonated solids separation on the energy penalties and equipment size. The inclusion of a solid separation stage leads to a maximum increase of energy storage efficiency of 26 % and a size reduction between 53 and 74 % of those heat exchangers affected by solids streams. info:eu-repo/grantAgreement/ES/DGA/T46-20R info:eu-repo/grantAgreement/EC/H2020/727348/EU/SOlar Calcium-looping integRAtion for Thermo-Chemical Energy Storage/SOCRATCES This project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No H2020 727348-SOCRATCES info:eu-repo/grantAgreement/ES/MCIU/FPU17-03902 info:eu-repo/semantics/openAccess by-nc-nd http://creativecommons.org/licenses/by-nc-nd/3.0/es/ 9.4 2022 ENERGY & FUELS 19 / 119 = 0.16 2022 Q1 T1 1.456 2022 Electrical and Electronic Engineering 2022 Q1 Renewable Energy, Sustainability and the Environment 2022 Q1 Energy Engineering and Power Technology 2022 Q1 10.3 2022 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Lisbona, P. Universidad de Zaragoza (orcid)0000-0002-2306-6729 Romeo, L.M. Universidad de Zaragoza (orcid)0000-0001-7379-6159 5004 590 Universidad de Zaragoza Dpto. Ingeniería Mecánica Área Máquinas y Motores Térmi. 55 (2022), 105771 [13 pp.] J. energy storage Journal of Energy Storage 2352-152X 2846752 http://zaguan.unizar.es/record/120012/files/texto_completo.pdf Versión publicada 2573331 http://zaguan.unizar.es/record/120012/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:120012 articulos driver 2024-03-18-14:16:10 ARTICLE