Communication Dans Un Congrès Année : 2019

Phosphates by-products valorization for thermal energy storage

Résumé

Energy management has always been a major issue, particularly now that fossil fuels, the main energy sources are becoming increasingly scarce associate with the mountain concerns about global warming. This last decade has seen a market increase in research focused on the development of the renewable energies, an alternative of the use of fossil fuels. One of the promising renewable energy technology is the concentrated solar power (CSP) thanks to the availability of the abundant solar radiation worldwide and the thermal energy storage (TES) [1], [2]. According to the International Energy Agency (IEA), CSP cumulative capacity is forecast to growth by 5GW in 2017 and reach 30GW by 2030; 6 times [3]. TES system is indispensable for the continuous operation of CSP and for the production of electricity at constant power. TES is also a relevant technology for industrial waste heat recovery, which represents an important source of energy to manage. According to the French Agency of Energy (ADEME), the industrial waste heat can represent up to 60% of inlet process energy in heavy industries; most of it available in high temperature around at least 1000°C [4]. One of the most important part in TES is the storage medium. Up-to-date, molten salts (alkali nitrates) are the main heat storage media used in CSP. However they are limited in working temperature and present the drawbacks of being flammable. It is then currently an urgency to develop new TES materials compatible with high temperature (1000°C) for heat storage in CSP as well as for the recovery of waste heat from industrial facilities. New generation of TES materials have to comply with many criteria including availability at industrial scale, low cost, easy processing, low environmental impact, high thermo-physical and thermo-mechanical properties, high thermal stability. This work aimed at developing new ceramics for thermal energy storage by recycling by-products from phosphates industries. Monolith materials available in large quantity were obtained by extrusion process and characterized using several techniques. The ceramics developed in this work are demonstrated to be stable at high temperature (up to 1150°C). They have interesting thermo-physical thermo-mechanical properties. The results have shown that these new materials are suitable not only for heat storage at large-scale application (CSP, waste heat in industries) but also they can be used as building materials in the field of housing. References [1] H. L. Zhang, J. Baeyens, J. Degrève, and G. Cacères, “Concentrated solar power plants: Review and design methodology,” Renewable and Sustainable Energy Reviews, vol. 22, pp. 466–481, Jun. 2013. [2] D. Barlev, R. Vidu, and P. Stroeve, “Innovation in concentrated solar power,” Solar Energy Materials and Solar Cells, vol. 95, no. 10, pp. 2703–2725, Oct. 2011. [3] IRENA “Renewable power generation costs in 2017”, technical report, 2018 [4] ADEME, “La chaleur fatale industrielle,” Rapport d’étude, 2015.

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Dates et versions

hal-04946635 , version 1 (20-02-2025)

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  • HAL Id : hal-04946635 , version 1

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Abdoul Razac Sane, Doan Pham Minh, Nawal Semlal, Claudia Toussaint, Alain Germeau, et al.. Phosphates by-products valorization for thermal energy storage. SYMPHOS 2019, Oct 2019, ben guerir, Morocco. ⟨hal-04946635⟩

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