Thermo-mechanical modelling of solar central receivers: effect of incident solar flux resolution

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Show simple item record Rodríguez Sánchez, María de los Reyes Marugán Cruz, Carolina Acosta Iborra, Antonio Santana Santana, Domingo José 2021-04-20T09:32:22Z 2021-04-20T09:32:22Z 2018-05-01
dc.identifier.bibliographicCitation Rodríguez-Sánchez, M. R., Marugán-Cruz, C., Acosta-Iborra, A. & Santana, D. (2018). Thermo-mechanical modelling of solar central receivers: Effect of incident solar flux resolution. Solar Energy, 165, pp. 43–54.
dc.identifier.issn 0038-092X
dc.description.abstract The most important constraint for central receiver design is to keep the intercepting solar flux within the tube mechanical safety limits. An error in the heliostat aiming strategy or an inaccurate estimation of the tube temperature can produce overheating of the tubes, putting at risk the power plant operation. Therefore, the development of thermo-mechanical models to predict the incident solar flux, the temperature and the thermal stresses is mandatory. The large number of tubes in the receivers makes a detailed simulation computationally expensive, and simplifications are usually done. These simplifications consist on selecting a representative tube in each panel of the receiver and reducing the spatial resolution of the incident radiation to a scale equal to one panel size. This "coarse grid model" simulation can be used with confidence to obtain the solar tower yield production with an error lower than 2.5%. However, the small resolution of this model results in errors in the wall temperature and the thermal stresses estimation, and hence in the aiming strategy selection. In this study a 'fine grid model", whose cells have a size equal to the tube pitch (distance between centres of the tubes) width in the receiver, has been developed for an accurate estimation of the tube wall temperature. Using this fine grid model the temperature and the thermal stress profiles in each tube, for a given panel of the receiver, can be indirectly obtained without assuming that all the tubes of the panel have the same temperature profiles. Therefore, for modelling receiver, the fine grid model is required to determine with more accuracy the maximum tube stress and the aiming strategy, especially in the real situation of a highly non-uniform solar flux onto the receiver.
dc.format.extent 12
dc.language.iso eng
dc.publisher Elsevier
dc.rights © 2018 Elsevier Ltd.
dc.rights Atribución-NoComercial-SinDerivadas 3.0 España
dc.subject.other Solar power tower
dc.subject.other Solar external receiver
dc.subject.other Fine grid model
dc.subject.other Thermo-mechanical analysis
dc.title Thermo-mechanical modelling of solar central receivers: effect of incident solar flux resolution
dc.type article
dc.subject.eciencia Energías Renovables
dc.rights.accessRights openAccess
dc.relation.projectID Gobierno de España. ENE2015-69486-R
dc.type.version acceptedVersion
dc.identifier.publicationfirstpage 43
dc.identifier.publicationlastpage 54
dc.identifier.publicationtitle Solar Energy
dc.identifier.publicationvolume 165
dc.identifier.uxxi AR/0000021430
dc.contributor.funder Ministerio de Economía y Competitividad (España)
dc.affiliation.dpto UC3M. Departamento de Ingeniería Térmica y de Fluidos
dc.affiliation.grupoinv UC3M. Grupo de Investigación: Ingeniería de Sistemas Energéticos
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