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Ensayos de envejecimiento acelerado de reflectores solares sometidos a radiaciĆ³n UV y corrosiĆ³n
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Advisor(s)
Abstract(s)
RESUMEN: La energĆa termosolar de concentraciĆ³n desempeƱa un rol fundamental en la transiciĆ³n energĆ©tica prevista para los prĆ³ximos aƱos. La generaciĆ³n energĆ©tica de esta tecnologĆa depende enormemente del comportamiento Ć³ptico de los reflectores; si Ć©ste se ve mermado, el rendimiento de toda la planta solar se verĆ” afectado. En consecuencia, utilizar un reflector adecuado puede suponer la diferencia entre el Ć©xito o el fracaso de un proyecto. Para ciertas aplicaciones de esta energĆa, es necesario situar la planta solar en zonas cercanas a la costa donde la corrosividad y la dosis de radiaciĆ³n UV son muy elevadas. Por lo tanto, es necesario evaluar la durabilidad de los reflectores en dichos ambientes. Para ello, se han expuesto varias muestras de reflectores en AlmerĆa (EspaƱa) para identificar los principales mecanismos de degradaciĆ³n que tienen lugar en los materiales. AdemĆ”s, se han realizado con Ć©xito varios ensayos de envejecimiento acelerado que reproducen adecuadamente los principales mecanismos de degradaciĆ³n observados en intemperie, pero en un tiempo mucho menor. En particular, se ensayaron en condiciones aceleradas tres tipos de reflectores para evaluar su durabilidad frente a la corrosiĆ³n y degradaciĆ³n UV.
ABSTRACT: Concentrating solar thermal energy plays a fundamental role in the energetic transition planned for the next years. The energetic generation of this technology hugely depends on the optical behavior of the solar reflectors; if it decreases, the performance of the whole solar plant will be affected. Consequently, the use of a proper reflector might suppose the difference between the success or the failure of a project. For some solar thermal energy applications, it is required to place the solar plant near to the coast where the corrosivity and the UV doses are extremely high. Hence, it is necessary to assess the durability of the reflectors in these climates. For that purpose, several reflector samples were exposed in AlmerĆa (Spain) in order to identify the main degradation mechanisms. Furthermore, various accelerated aging tests which suitably reproduce the degradation mechanisms observed in AlmerĆa in a short period of time, were carried out. In particular, the durability of three different reflector materials against the corrosion and the UV degradation was studied in accelerated aging conditions.
ABSTRACT: Concentrating solar thermal energy plays a fundamental role in the energetic transition planned for the next years. The energetic generation of this technology hugely depends on the optical behavior of the solar reflectors; if it decreases, the performance of the whole solar plant will be affected. Consequently, the use of a proper reflector might suppose the difference between the success or the failure of a project. For some solar thermal energy applications, it is required to place the solar plant near to the coast where the corrosivity and the UV doses are extremely high. Hence, it is necessary to assess the durability of the reflectors in these climates. For that purpose, several reflector samples were exposed in AlmerĆa (Spain) in order to identify the main degradation mechanisms. Furthermore, various accelerated aging tests which suitably reproduce the degradation mechanisms observed in AlmerĆa in a short period of time, were carried out. In particular, the durability of three different reflector materials against the corrosion and the UV degradation was studied in accelerated aging conditions.
Description
CIES2020 - XVII Congresso IbƩrico e XIII Congresso Ibero-americano de Energia Solar
Keywords
Solar energy Concentrated solar power Thermal energy Corrosion
Citation
BuendĆa-MartĆnez, F... [et.al.] - Ensayos de envejecimiento acelerado de reflectores solares sometidos a radiaciĆ³n UV y corrosiĆ³n. In: CIES2020: As Energias RenovĆ”veis na TransiĆ§Ć£o EnergĆ©tica: Livro de ComunicaƧƵes do XVII Congresso IbĆ©rico e XIII Congresso Ibero-americano de Energia Solar. Helder GonƧalves, Manuel Romero (Ed.). Lisboa, Portugal: LNEG, 3-5 Novembro, 2020, p. 323-330
Publisher
LNEG - LaboratĆ³rio Nacional de Energia e Geologia