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Publicação
Dynamic corrosion testing of metals in solar salt for concentrated solar power
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Orientador(es)
Resumo(s)
ABSTRACT: Potassium nitrate and sodium nitrate in mixing proportion of KNO3-NaNO3 40-60 wt% (also called solar salt) has been successfully used for over a decade as heat storage medium for concentrated solar power parabolic-trough collector plants at temperatures up to 400 degrees C. At temperatures of 560 degrees C, reached in state-of-the-art solar tower systems, corrosion of metallic components in contact with solar salt can become an issue and has caused leaks and plant shut-downs in recently built tower projects. While the corrosion rates of several materials have been determined for different temperatures in static molten salt immersion experiments, there is a lack of corrosion data for dynamic in-service conditions. In this work, a dynamic corrosion test has been conducted on 19 different material types including protective coatings, mimicking flow-rate, temperature gradient and draining of inservice operation of a receiver in a concentrated solar power tower. The measured corrosion rates are presented and compared to static corrosion tests reported in literature.
Descrição
Palavras-chave
Materials Corrosion Molten salt Coatings Thermal energy storage Concentrated solar power Durability test
Contexto Educativo
Citação
Sutter, Florian... [et.al.] - Dynamic corrosion testing of metals in solar salt for concentrated solar power. In: Solar Energy Materials and Solar Cells, 2021, Vol. 232, article nº 111331
Editora
Elsevier