Experimental and numerical study of the heat transfer process during the startup of molten salt tower receivers

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dc.contributor.author Fernández Torrijos, María
dc.contributor.author Sobrino Fernández, Celia
dc.contributor.author Marugán Cruz, Carolina
dc.contributor.author Santana Santana, Domingo José
dc.date.accessioned 2021-03-17T16:20:59Z
dc.date.available 2022-09-01T23:00:05Z
dc.date.issued 2020-09-01
dc.identifier.bibliographicCitation Fernández-Torrijos, M., Sobrino, C., Marugán-Cruz, C., & Santana, D. (2020). Experimental and numerical study of the heat transfer process during the startup of molten salt tower receivers. Applied Thermal Engineering, 178, 115528
dc.identifier.issn 1359-4311
dc.identifier.uri http://hdl.handle.net/10016/32166
dc.description.abstract During the startup operation of molten salt solar tower plants, the tubes of the receiver are subjected to a high nonhomogeneous heat flux along with a low heat transfer coefficient to the air inside the tube, which results in a highly uneven angular temperature distribution. This uneven temperature distribution causes thermal stresses and tube deflection in the receiver. The most important constraint for the design and operation of central receivers is to keep the intercepting solar flux within the tube mechanical safety limits. In this work, an experimental facility consisting of a molten salt loop that simulates a solar tower receiver tube is used to measure the outer surface temperature and the deflection of the tube under the startup operating conditions of a solar tower power plant. An inverse heat transfer problem is applied to obtain the heat flux onto the receiver tube from the outer surface temperature measurements. To solve the inverse problem, a transient three-dimensional numerical model of an empty circular pipe subjected to a nonhomogeneous heat flux is developed. A good agreement between the experimental and calculated tube temperatures and deflection is observed, with differences of 7% and 10%, respectively. Moreover, the thermal stresses are calculated. It has been found that higher thermal stresses are obtained when the tube is preheated compared to the stress when the molten salt is flowing under similar heat flux conditions.
dc.description.sponsorship This work was partially funded by the Ministerio de Eduación, Cultura y Deporte para la Formación de Profesorado Universitario (FPU-04941) and the Ministerio de Ciencia, Innovación y Universidades (RTI2018-096664-B-C21 (MICINN/FEDER, UE)) of the Spanish Government
dc.format.extent 51 p.
dc.language.iso eng
dc.publisher Elsevier
dc.rights © 2020 Elsevier Ltd.
dc.rights Atribución-NoComercial-SinDerivadas 3.0 España
dc.rights.uri http://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.subject.other Inverse heat conduction problem
dc.subject.other Induction coil
dc.subject.other Central receiver
dc.subject.other Tube bending
dc.title Experimental and numerical study of the heat transfer process during the startup of molten salt tower receivers
dc.type article
dc.subject.eciencia Energías Renovables
dc.identifier.doi https://doi.org/10.1016/j.applthermaleng.2020.115528
dc.rights.accessRights openAccess
dc.relation.projectID Gobierno de España. RTI2018-096664-B-C21
dc.type.version acceptedVersion
dc.identifier.publicationfirstpage 115528-1
dc.identifier.publicationlastpage 115528-15
dc.identifier.publicationtitle Applied Thermal Engineering
dc.identifier.publicationvolume 178
dc.identifier.uxxi AR/0000026255
dc.contributor.funder Ministerio de Ciencia, Innovación y Universidades (España)
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