Publication:
Deflection and Stresses in Solar Central Receivers

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dc.affiliation.dptoUC3M. Departamento de Ingeniería Térmica y de Fluidoses
dc.affiliation.grupoinvUC3M. Grupo de Investigación: Ingeniería de Sistemas Energéticoses
dc.contributor.authorLaporte Azcué, Marta
dc.contributor.authorGonzález Gómez, Pedro Ángel
dc.contributor.authorRodríguez Sánchez, María de los Reyes
dc.contributor.authorSantana Santana, Domingo José
dc.contributor.funderMinisterio de Economía y Competitividad (España)es
dc.contributor.funderMinisterio de Ciencia, Innovación y Universidades (España)es
dc.date.accessioned2021-04-14T08:14:31Z
dc.date.available2022-01-01T00:00:04Z
dc.date.issued2020-01-01
dc.description.abstractThe aim of the design of central solar receivers is to withstand the high non-uniform solar-heat-flux and temperature during the solar-power-plant lifetime. This high non-uniform tube temperature causes high thermal stress, producing creep and fatigue damage. Therefore, is necessary to obtain an accurate estimation of the tube stresses during the receiver operation. In the same way, to ensure the panel integrity, the frontal and lateral tube deflections must be obtained to avoid excessive panel bowing and warpage, respectively. The huge number of simulations needed to perform the creep-fatigue analysis precludes the use of high time-consuming CFD-FEM simulations. To resolve this drawback, a reliable, accurate and fast procedure to obtain the tube stresses, using analytical stress estimation, is proposed. The procedure considers the temperature dependence of the thermo-mechanical properties. The temperature-dependent hoop stress is estimated using the solution for constant mechanical properties whereas the radial stress is estimated taking constant the Young modulus only. The temperature-dependent axial-bending stress is obtained using the non-homogeneous beam equation subjected to the movement restriction produced by tube clips. When the tube displacement is restricted by tube clips, the equivalent stress difference is less than 2% taking temperature-dependent properties and slightly higher than 10% for constant properties. The proposed stress estimation is enough accurate to perform a reliable fatigue-creep analysis and two order of magnitude faster than the CFD-FEM simulations. Finally, the tube deflection and displacement, restricted by tube clips, are derived straightforward using the temperature-dependent tube curvature and the beam theory.en
dc.format.extent14
dc.identifier.bibliographicCitationLaporte-Azcué, M., González-Gómez, P. A., Rodríguez-Sánchez, M. R. & Santana, D. (2020). Deflection and stresses in solar central receivers. Solar Energy, 195, pp. 355–368.en
dc.identifier.doihttps://doi.org/10.1016/j.solener.2019.11.066
dc.identifier.issn0038-092X
dc.identifier.publicationfirstpage355
dc.identifier.publicationlastpage368
dc.identifier.publicationtitleSolar Energyen
dc.identifier.publicationvolume195
dc.identifier.urihttps://hdl.handle.net/10016/32353
dc.identifier.uxxiAR/0000024043
dc.language.isoeng
dc.publisherElsevieren
dc.relation.projectIDGobierno de España. RTI2018-096664-B-C21es
dc.relation.projectIDGobierno de España. FPU-02361es
dc.rights© 2019 International Solar Energy Society.en
dc.rightsAtribución-NoComercial-SinDerivadas 3.0 España*
dc.rights.accessRightsopen accessen
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/es/*
dc.subject.ecienciaEnergías Renovableses
dc.subject.otherSolar lower toweren
dc.subject.otherExternal central receiveren
dc.subject.otherAnalytic methoden
dc.subject.otherThermal stressen
dc.subject.otherDeformationen
dc.subject.otherVariable propertiesen
dc.titleDeflection and Stresses in Solar Central Receiversen
dc.typeresearch article*
dc.type.hasVersionAM*
dspace.entity.typePublication
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