Inverse heat problem of determining unknown surface heat flux in a molten salt loop

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dc.contributor.author Fernández Torrijos, María
dc.contributor.author Sobrino Fernández, Celia
dc.contributor.author Almendros Ibáñez, José Antonio
dc.contributor.author Marugán Cruz, Carolina
dc.contributor.author Santana Santana, Domingo José
dc.date.accessioned 2021-03-17T15:33:45Z
dc.date.accessioned 2021-03-18T09:13:48Z
dc.date.available 2021-08-01T23:00:05Z
dc.date.issued 2019-08-01
dc.identifier.bibliographicCitation Fernández-Torrijos, M., Sobrino, C., Almendros-Ibáñez, J. A., Marugán-Cruz, C., & Santana, D. (2019). Inverse heat problem of determining unknown surface heat flux in a molten salt loop. International Journal of Heat and Mass Transfer, 139, 503-516.
dc.identifier.issn 0017-9310
dc.identifier.uri http://hdl.handle.net/10016/32165
dc.description.abstract Inverse heat transfer problems typically rely on temperature measurements for estimating unknown boundary heat flux, such as that in the water tubes of steam boilers or central receivers in solar tower power plants. In this work, an experimental facility consisting of a molten salt loop that simulates a tube of a solar tower receiver is presented to obtain the outer tube surface temperatures under solar tower power plant operating conditions. The external surface f the pipe in the test section is heated in a controlled manner with an induction heater, which provides a very high nonuniform heat flux. An inverse thermal method has been applied to obtain the incident heat flux onto the receiver tube from the outer surface temperature measurements. To solve the inverse problem, a transient two-dimensional numerical model of a circular pipe flowing molten nitrate salt and subjected to a nonhomogeneous circumferential heat flux has been developed. The heat flux calculation with the inverse method is in accordance with the heat flux estimation based on the calibration of the induction heater. A good agreement between the experimental and calculated temperatures is observed. Furthermore, the deflection of the tube caused by the nonhomogeneous heat flux is measured and is compared to the deflection calculated from the radial temperature profile from the inverse problem solution, and a good agreement between both results is observed.
dc.description.sponsorship This work was partially funded by the Ministerio de Eduación, Cultura y Deporte para la Formación de Profesorado Universitario (FPU-04941), the Ministerio de Ciencia, Innovacion y Universidades (Project RTI2018-096664-B-C21 (MICINN/FEDER, UE)) of the Spanish Government and the Project SBPLY/17/180501/000412 of the Regional Government of Castilla-La Mancha.
dc.format.extent 51 p.
dc.language.iso eng
dc.publisher Elsevier
dc.rights © 2019 Elsevier
dc.rights Atribución-NoComercial-SinDerivadas 3.0 España
dc.rights.uri http://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.subject.other Central receiver
dc.subject.other Inductor coil
dc.subject.other Inverse heat conduction problem
dc.subject.other Tube bending
dc.title Inverse heat problem of determining unknown surface heat flux in a molten salt loop
dc.type article
dc.subject.eciencia Energías Renovables
dc.identifier.doi https://doi.org/10.1016/j.ijheatmasstransfer.2019.05.002
dc.rights.accessRights openAccess
dc.relation.projectID Gobierno de España. RTI2018-096664-B-C21
dc.type.version acceptedVersion
dc.identifier.publicationfirstpage 503
dc.identifier.publicationlastpage 516
dc.identifier.publicationtitle International Journal of Heat and Mass Transfer
dc.identifier.publicationvolume 139
dc.identifier.uxxi AR/0000023997
dc.contributor.funder Ministerio de Ciencia, Innovación y Universidades (España)
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