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Solar heat localization: concept and emerging applications

Abstract

Recently, solar heat localization concept has provided an appealing route for efficient utilization of solar thermal energy. This concept has shown remarkable promise in power generation, desalination, distillation, water splitting, sterilization, oil spill cleanup, electricity generation from salinity and also CO2 capture. In this concept, a material paradigm localizes the solar irradiation forming a hot spot in the material and minimizes the energy losses to the surrounding environment. In most applications, the localized thermal energy is used for liquid-vapor phase change in which the material wicks the liquid into the hot spot to generate hot steam. In contrast to conventional steam generation systems, thermal losses are reduced significantly, thereby offering high evaporation efficiencies. In this comprehensive review, physics of solar heat localization is elaborated and a roadmap on necessary material properties is provided to achieve superior performance through this concept. The current advancements on synthesis of new materials for solar heat localization are discussed in detail. Various applications of this concept are explored individually and the figures of merit for each application are elucidated. A comparative analysis is conducted for these figures of merit on a wide range of studies and key takeaways are highlighted. Finally, the current challenges and future prospects for technological implementation of this concept are reviewed. As solar energy is the most abundant renewable energy resource on earth, this concept could open a path to significantly reduce carbon foot print of electricity and water generation in the world.

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Article information


Submitted
24 Jan 2020
Accepted
25 Mar 2020
First published
25 Mar 2020

J. Mater. Chem. A, 2020, Accepted Manuscript
Article type
Review Article

Solar heat localization: concept and emerging applications

V. Kashyap and H. Ghasemi, J. Mater. Chem. A, 2020, Accepted Manuscript , DOI: 10.1039/D0TA01004A

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