Use of rotary kilns for solar thermal applications: Review of developed studies and analysis of their potential

Alonso, Elisa; Gallo, A.; Roldán, M.I.; Pérez-Rábago, Carlos; Fuentealba, Edward

doi:10.1016/j.solener.2017.01.004

Cited by 34 publications

(9 citation statements)

References 78 publications

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“…Namely, in such a mode and with rather fast heating rates, the front part of the copper oxide monolith suffered from melting and at low heating rates from severe thermal gradients. The use of rotary kilns for solar thermal applications was recently reviewed by Alonso et al Moving beds have the benefit of better contact of gas and solid phases, however, present challenges related to materials temperature acquisition, resulting less attractive for more fundamental studies . For more detailed information about directly irradiated reactors (receivers), we refer to the reviews by Ho. , …”

Section: Thermochemical Heat Storage Based On Redox Cycles Of Metal O...mentioning

confidence: 99%

Solar Energy on Demand: A Review on High Temperature Thermochemical Heat Storage Systems and Materials

et al. 2019

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Among renewable energies, wind and solar are inherently intermittent and therefore both require efficient energy storage systems to facilitate a round-the-clock electricity production at global scale. In this context, concentrated solar power (CSP) stands out among other sustainable technologies because it offers the interesting possibility of storing energy collected from the sun as heat, by sensible, latent or thermochemical means. Accordingly, continuous electricity generation in the power block is possible even during off-sun periods, providing CSP plants with a remarkable dispatchability. Sensible heat storage has been already incorporated to commercial CSP plants. However, due to its potentially higher energy storage density, thermochemical heat storage (TCS) systems emerge as an attractive alternative for the design of next generation power plants, which are expected to operate at higher temperatures. Through these systems, thermal energy is used to drive endothermic chemical reactions, which can subsequently release the stored energy when needed through a reversible exothermic step. This review analyzes the status 2 of this prominent energy storage technology, its major challenges and future perspectives, covering in detail the numerous strategies proposed for the improvement of materials and thermochemical reactors. Thermodynamic calculations allow selecting high energy density systems, but experimental findings indicate that sufficiently rapid kinetics and long-term stability trough continuous cycles of chemical transformation are also necessary for practical implementation. In addition, selecting easy to handle materials with reduced cost and limited toxicity is crucial for large-scale deployment of this technology. In this work, the possible utilization of materials as diverse as metal hydrides, hydroxides or carbonates for thermochemical storage is discussed. Furthermore, especial attention is paid to the development of redox metal oxides, such as Co3O4/CoO, Mn2O3/Mn3O4 and perovskites of different compositions, as an auspicious new class of TCS materials due to the advantage of working with atmospheric air as reactant, avoiding the need of gas storage tanks. Current knowledge about the structural, morphological and chemical modifications of these solids, either caused during redox transformations, or induced wittingly as a way to improve their properties, is revised in detail. In addition, the design of new reactors concepts proposed for the most efficient use of TCS in concentrated solar facilities is also critically considered. Finally, strategies for the harmonic integration of these units in functioning solar power plants, as well as the economic aspects are also briefly assessed.

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Section: Thermochemical Heat Storage Based On Redox Cycles Of Metal O...mentioning

confidence: 99%

Solar Energy on Demand: A Review on High Temperature Thermochemical Heat Storage Systems and Materials

et al. 2019

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“…Two other review works, by Alonso et al [15] and by Ho [16], published in 2017 and 2016, respectively, are also worth being mentioned. Alonso et al [15] reviewed the rotary kiln technology and focused on the employment of these devices for thermal and thermochemical processes conducted by concentrating solar energy. Among the solar devices, a novel rotary kiln prototype for thermochemical processes was presented and compared with a static solar reactor.…”

Section: Other Recent Overviewsmentioning

confidence: 94%

Solar Heat for Materials Processing: A Review on Recent Achievements and a Prospect on Future Trends

Rosa

2019

ChemEngineering

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Considering works published in the literature for more than a decade (period from January 2008 till June 2019), this paper provides an overview of recent applications of the so-called “solar furnaces”, their reactors, process chambers and related devices, aiming specifically at the processing of (solid) materials. Based on the author’s own experience, some prospects on future trends are also presented. The aim of this work is to demonstrate the tremendous potentialities of the usage of solar heat for materials processing, but also to reveal the necessity of further developing solar-driven high-temperature technologies (which are required to displace the use of electricity or natural gas). In particular, it is essential to improve the temperature homogeneity conditions inside reaction chambers for materials processing using solar heat. Moreover, new innovative modular systems, practical and flexible, for capture, concentration, control and conduction of concentrated solar radiation are suggested. Solar thermal technologies for the production of electricity, as well as solar thermochemical processes for production of gases or liquids, are outside the scope of this review.

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“…Packed bed or porous solid structured reactors benefit of low cost and offer reduced problems of solids attrition and erosion, but the drawbacks related to inefficient heat and mass transfer, nonuniform irradiance distribution on the particle volume, and more complex scale-up criteria must be underlined (Cho et al, 2015;Marxer et al, 2015;Deutsch et al, 2017;Tescari et al, 2017;Arribas et al, 2018;Guene Lougou et al, 2018;Zsembinszki et al, 2018;Almendros-Ibáñez et al, 2019;Guene Lougou et al, 2020;Peng et al, 2020;Shuai et al, 2020). As far as rotary kilns are concerned, they are characterized by long life of the main components, with not high maintenance costs and high versatility when particle shape, size and composition are taken into account (Alonso et al, 2017;Montagnaro et al, 2018).…”

Section: Fluidized Bed Solar Receivers and Reactors: Basic Design And Operational Features Particle Receivers And Fluidized Bedsmentioning

confidence: 99%

Fluidized Beds for Concentrated Solar Thermal Technologies—A Review

et al. 2021

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Thermal and thermochemical processes can be efficiently developed and carried out in fluidized beds, due to the unique properties of fluidized suspensions of solid particles and to the inherent flexibility of fluidized bed design and operation. Coupling fluidization with concentrated solar power is a stimulating cross-disciplinary field of investigation, with the related issues and opportunities to explore. In this review article the current and perspective applications of fluidized beds to collection, storage and exploitation of solar radiation are surveyed. Novel and “creative” designs of fluidized bed solar receivers/reactors are reported and critically discussed. The vast field of applications of solar-driven fluidized bed processes, from energy conversion with thermal energy storage, to solids looping for thermochemical energy storage, production of fuels, chemicals and materials, is explored with an eye at past and current developments and an outlook of future perspectives.

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Use of rotary kilns for solar thermal applications: Review of developed studies and analysis of their potential

Cited by 34 publications

References 78 publications

Solar Energy on Demand: A Review on High Temperature Thermochemical Heat Storage Systems and Materials

Solar Energy on Demand: A Review on High Temperature Thermochemical Heat Storage Systems and Materials

Solar Heat for Materials Processing: A Review on Recent Achievements and a Prospect on Future Trends

Fluidized Beds for Concentrated Solar Thermal Technologies—A Review

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