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Solar thermal coatings are designed to achieve the highest incident solar flux into the receiver of a tower solar plant. These materials are subjected to extreme working conditions of temperature and solar concentrated radiation. Much effort is being made to develop a durable and high absorptive coating that can provide an excellent solar to heat conversion efficiency. Complex deposition techniques (PVD, CVD, electrodeposition, etc.) are developed and tested to achieve solar selectivity. High solar absorptance paints are an alternative technique, that is, easy to apply and implement in the field. In paint, pigments are the compound that provides high absorptance values, whose stability impacts the durability of optical properties. The search for new selective solar pigments for solar receivers is a promising route to improve the efficiency of this technology. In this work, novel nanocomposites were synthesized from low-cost organic materials such as table sugar. Promising results were obtained when intercalated and calcined in the laminar structure of montmorillonite, a type of smectite clay. The pigments were tested in a paint format on metallic coupons at different temperatures to obtain absorptivities above 96% of absorptance after 24 h at 700  °C. Further experiments are still needed to obtain optimum conditions to maximize the coating's absorptivity and durability at high temperature.

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Autor(es)

Micó -  Vicent, Bàrbara -  López -  Herraiz, María -  Bello, Azucena -  Martínez, Noelia -  Martínez -  Verdú, Francisco M. - 

Id.: 71083013

Idioma: eng  - 

Versión: 1.0

Estado: Final

Palabras claveCoatings - 

Tipo de recurso: info:eu-repo/semantics/article  - 

Tipo de Interactividad: Expositivo

Nivel de Interactividad: muy bajo

Audiencia: Estudiante  -  Profesor  -  Autor  - 

Estructura: Atomic

Coste: no

Copyright: sí

: © 2017 ASME

Requerimientos técnicos:  Browser: Any - 

Relación: [References] http://dx.doi.org/10.1115/1.4035757

Fecha de contribución: 16-mar-2018

Contacto:

Localización:
* Journal of Solar Energy Engineering. 2017, 139(3): 031005. doi:10.1115/1.4035757
* 0199-6231 (Print)
* 1528-8986 (Online)
* 10.1115/1.4035757

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