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oai:recercat.cat:10459.1/478912024-12-05T22:21:40Zcom_2072_3622col_2072_479130

00925njm 22002777a 4500 dc Solé, Aran author Fontanet, Xavier author Barreneche Güerisoli, Camila author Fernández Renna, Ana Inés author Martorell, Ingrid author Cabeza, Luisa F. author 2015-02-09T08:10:32Z 2025-01-01 2013 Solar thermochemical reactors offer good potential for production of heat for residential space heating and cooling and domestic hot water. The materials able to store solar energy are called thermochemical materials which are based on reversible chemical reactions, focusing here on solid–gas ones. These materials are capable to store solar thermal energy in one direction and to release it in the other, whenever is needed, with almost no heat losses. In the literature several materials have been successfully analyzed and tested at lab scale, but the expected heat storage capacity, or yield, of the reactor implementing these materials is not achieved. This paper shows that in order to reach the calculated operation conditions, a detailed and proper characterization of solid materials involved is needed (including solubility of the reactants and products, and evaluation of the crystallographic structure changes). Furthermore, a reliable kinetic model should be obtained to predict further behavior and to design the suitable reactor. The main goal of this paper is to provide a correct pathway to obtain the reliable kinetic model regarding important solid features that should be considered when working on thermochemical energy storage. The work is partially funded by the Spanish government (ENE2011-28269-C03-02 and ENE2011-22722). The authors would like to thank the Catalan Government for the quality accreditation given to their research groups GREA (2009 SGR 534) and research group DIOPMA (2009 SGR 645). Aran Solé would like to thank University of Lleida for her research fellowship. http://hdl.handle.net/10459.1/47891 Solar thermochemical reactor Thermochemical materials Solid state kinetics Requirements to consider when choosing a thermochemical material for solar energy storage