Calculating molten-salt central-receiver lifetime under creep-fatigue damage

dc.affiliation.dptoUC3M. Departamento de Ingeniería Térmica y de Fluidoses
dc.affiliation.grupoinvUC3M. Grupo de Investigación: Ingeniería de Sistemas Energéticoses
dc.contributor.authorGonzález Gómez, Pedro Ángel
dc.contributor.authorRodríguez Sánchez, María de los Reyes
dc.contributor.authorLaporte Azcué, Marta
dc.contributor.authorSantana Santana, Domingo José
dc.contributor.funderComunidad de Madrides
dc.contributor.funderMinisterio de Ciencia, Innovación y Universidades (España)es
dc.description.abstractOne of the major uncertainties in the design of molten-salt solar receivers is the estimation of the lifetime because solar receivers have to withstand high temperature, thermal stress and corrosive-media in addition to daily star-up and shutdown. The first step to estimate the receiver damage and therefore, to monitor and manage the receiver life cycle, is to obtain properly the tube stresses under daily operating conditions. Whit this aim, we propose a straightforward low-computational cost procedure to determine the stresses under elastic-plastic regime. In addition, the stress relaxation due to visco-elastic behavior of the material, is also calculated. The analytical thermo-elastic, elastic-plastic and relaxation stress models for the high-nickel alloy Haynes 230 were verified against finite element simulations showing a good accuracy with a low-computational cost. For exemplification purposes, a reference operation day of a molten-salt solar receiver like Gemasolar is investigated. A receiver creep-fatigue damage assessment was developed for a flat aiming strategy. The results showed that the fatigue damage is 0.03% of the total damage. The average-field-receiver efficiency was 42.18% with a predicted lifetime higher than the expected. On the contrary, the receiver lifetime increases unnecessarily and the field-receiver efficiency drops to 26.25% when the receiver is operated limiting the stress as one third of the ultimate tensile strength (UTS/3). This limit results in a loss of revenues of around 250,000Euros per month. Hence, the excessive level of conservatism produced by stress limit methods are not suitable for solar receivers due to the resulting economic penalties.en
dc.description.sponsorshipThis research is partially funded by the Spanish government under the project RTI2018-096664-B-C21 (MICINN/FEDER, UE), the fellowship “Ayuda a la investigación en energía y medio ambiente” of the Iberdrola España Foundation, the scholarship “Ayudas para la formación del profesorado universitario” (FPU-02361) awarded by the Spanish Ministerio de Educación, Cultura y Deporte (MECD), and the fellowship “Programa de apoyo a la realización de proyectos interdisciplinares de I + D para jóvenes investigadores de la Universidad Carlos III de Madrid 2019-2020” under the projects RETOrenovalbe-CM-UC3M (2020/00034/001) and ZEROGASPAIN-CM-UC3M (2020/00033/001), funded on the frame of “Convenio Plurianual Comunidad de Madrid-Universidad Carlos III de Madrid 2019-2022”.en
dc.identifier.bibliographicCitationGonzález-Gómez, P., Rodríguez-Sánchez, M., Laporte-Azcué, M. & Santana, D. (2021). Calculating molten-salt central-receiver lifetime under creep-fatigue damage. Solar Energy, 213, 180-197.en
dc.identifier.publicationtitleSolar Energyen
dc.relation.projectIDGobierno de España. RTI2018-096664-B-C21es
dc.relation.projectIDComunidad de Madrid. ZEROGASPAIN-CM-UC3Mes
dc.rights© 2020 International Solar Energy Society.en
dc.rightsAtribución-NoComercial-SinDerivadas 3.0 España*
dc.rights.accessRightsopen access
dc.subject.ecienciaEnergías Renovableses
dc.titleCalculating molten-salt central-receiver lifetime under creep-fatigue damageen
dc.typeresearch article*
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