Long-Term Evaluation of a Ternary Mixture of Molten Salts in Solar Thermal Storage Systems: Impact on Thermophysical Properties and Corrosion

Simple item page
dc.contributor.authorHenriquez, Mauro
dc.contributor.authorReinoso-Burrows, Juan Carlos
dc.contributor.authorPasten, Raul
dc.contributor.authorSoto, Carlos
dc.contributor.authorDuran, Carlos
dc.contributor.authorOlivares, Douglas
dc.contributor.authorGuerreiro, Luis
dc.contributor.authorCardemil, Jose Miguel
dc.contributor.authorMadrid, Felipe M. Galleguillos
dc.contributor.authorFuentealba, Edward
dc.date.accessioned2025-01-20T16:09:08Z
dc.date.available2025-01-20T16:09:08Z
dc.date.issued2024
dc.description.abstractSolar thermal plants typically undergo trough operational cycles spanning between 20 and 25 years, highlighting the critical need for accurate assessments of long-term component evolution. Among these components, the heat storage media (molten salt) is crucial in plant design, as it significantly influences both the thermophysical properties of the working fluid and the corrosion of the steel components in thermal storage systems. Our research focused on evaluating the long-term effects of operating a low-melting-point ternary mixture consisting of 30 wt% LiNO3, 57 wt% KNO3, and 13 wt% NaNO3. The ternary mixture exhibited a melting point of 129 degrees C and thermal stability above 550 degrees C. Over 15,000 h, the heat capacity decreased from 1.794 to 1.409 J/g degrees C. Additionally, saline components such as CaCO3 and MgCO3, as well as lithium oxides (LiO and LiO2), were detected due to the separation of the ternary mixture. A 30,000 h exposure resulted in the formation of Fe2O3 and the presence of Cl, indicating prolonged interaction with the marine environment. This investigation highlights the necessity of analyzing properties under actual operating conditions to accurately predict the lifespan and select the appropriate materials for molten salt-based thermal storage systems.
dc.fuente.origenWOS
dc.identifier.doi10.3390/ma17164053
dc.identifier.eissn1996-1944
dc.identifier.urihttps://doi.org/10.3390/ma17164053
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/90132
dc.identifier.wosidWOS:001305142800001
dc.issue.numero16
dc.language.isoen
dc.revistaMaterials
dc.rightsacceso restringido
dc.subjectmolten salts
dc.subjectlithium nitrate
dc.subjectsteel
dc.subjectcorrosion
dc.subject.ods07 Affordable and Clean Energy
dc.subject.odspa07 Energía asequible y no contaminante
dc.titleLong-Term Evaluation of a Ternary Mixture of Molten Salts in Solar Thermal Storage Systems: Impact on Thermophysical Properties and Corrosion
dc.typeartículo
dc.volumen17
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
Files
Collections
Artículos de revistas