Publication:
Influence of eccentricity on the thermomechanical performance of a bayonet tube of a central solar receiver

Simple item page
dc.affiliation.dptoUC3M. Departamento de Ingeniería Térmica y de Fluidoses
dc.affiliation.grupoinvUC3M. Grupo de Investigación: Ingeniería de Sistemas Energéticoses
dc.contributor.authorPérez Álvarez, Rafael
dc.contributor.authorMarugán Cruz, Carolina
dc.contributor.authorSantana Santana, Domingo José
dc.contributor.authorAcosta Iborra, Antonio
dc.contributor.funderComunidad de Madrides
dc.contributor.funderMinisterio de Economía y Competitividad (España)es
dc.contributor.funderUniversidad Carlos III de Madrides
dc.contributor.funderMinisterio de Ciencia e Innovación (España)es
dc.contributor.funderAgencia Estatal de Investigación (España)es
dc.date.accessioned2023-11-15T11:08:03Z
dc.date.available2023-11-15T11:08:03Z
dc.date.issued2023-03-25
dc.description.abstractThis work numerically evaluates the thermal and mechanical behaviors of eccentric bayonet tubes to be used in external central receivers of solar power tower plants. A bayonet tube is composed of two tubes, one inside the other, creating circular and annular sections, through which the molten salt of the receiver sequentially flows. Eccentricity in the annular section is achieved by displacing the axis of the interior tube with regard to the exterior one. For comparative purposes, two examples of conventional tubes (single tubes with circular cross-sections with diameters of 25mm and 50mm) are also investigated in this work to compare their performances with those of bayonet tubes. The results obtained with the eccentric configurations show an enhancement of the heat transfer to the molten salt and a reduction of the tube wall overheating compared with the concentric bayonet tubes and the largest simple tube. For conditions representative of the normal operation of a solar power tower, eccentric bayonet tubes could reduce the pressure drop by 30.8% and increase the convective heat transfer achieved in a concentric configuration of the bayonet tube by 26.1%. Nevertheless, this pressure drop was considerably higher than those obtained in the smallest and largest simple tubes, which were 1.28 bar and 0.13 bar, respectively. To investigate whether the enhancement of the convection heat transfer experienced by bayonet tubes compensates for their higher pressure drop or not, a Performance Evaluation Criterion (PEC) was proposed and used to compare the global performance of bayonet tubes with that of conventional tubes. The bayonet tubes with eccentricity 0.45 obtained the largest PEC, which was up to 13% higher than reference conventional tubes. Enhancement of the tube wall refrigeration produced when increasing the eccentricity is reflected in the maximum tube temperature and thermal stresses, which are found to diminish by approximately 8.8% with the highest eccentricity. In addition, the largest eccentric bayonet tube layout obtains the smallest peak temperatures compared to conventional tubes. The lower inertial moment of the smallest conventional tube indicates that its thermal stress is 2.1% lower than the stress obtained in the most eccentric layout analyzed in this work. Nevertheless, the time to rupture associated with creep damage of the eccentric bayonet tube is 1.04 times higher than that obtained in the smallest simple tube, demonstrating that bayonet tubes could be a potential alternative to the current tubes of external tubular receivers.en
dc.description.sponsorshipThe authors gratefully acknowledge the financial support provided by the grants RTI2018-096664-B-C21 funded by FEDER/Ministerio de Ciencia e Innovación-Agencia Estatal de Investigación, Spain and PID2021-122895OB-I00 funded by MCIN/AEI/10.13039/501100011033 and by “ERDF A way of making Europe”. This work was also financed by the Community of Madrid, Spain through the line of “Excelencia del Profesorado Universitario” of the Pluriannual Agreement with the UC3M, Spain (EPUC3M22), within the framework of the V PRICIT (V Plan Regional de Investigación Científica e Innovación Tecnológica). Rafael Pérez-Álvarez acknowledges support from the scholarship ”Ayudas para contratos predoctorales para la formación de doctores” BES-2016-078455 awarded by the Ministerio de Economá, Industria y Competitividad, Spain .en
dc.format.extent19es
dc.identifier.bibliographicCitationPérez-Álvarez, R., Marugán-Cruz, C., Santana, D., & Acosta-Iborra, A. (2023). Influence of eccentricity on the thermomechanical performance of a bayonet tube of a central solar receiver. Applied Thermal Engineering, 223(119988).en
dc.identifier.doihttps://doi.org/10.1016/j.applthermaleng.2023.119988
dc.identifier.issn1359-4311
dc.identifier.publicationfirstpage1es
dc.identifier.publicationlastpage19es
dc.identifier.publicationtitleApplied Thermal Engineeringen
dc.identifier.publicationvolume223es
dc.identifier.urihttps://hdl.handle.net/10016/38866
dc.identifier.uxxiAR/0000033472
dc.language.isoengen
dc.publisherElsevieren
dc.relation.projectIDGobierno de España. BES-2016-078455es
dc.relation.projectIDGobierno de España. RTI2018-096664-B-C21es
dc.relation.projectIDGobierno de España. PID2021-122895OB-I00es
dc.relation.projectIDComunidad de Madrid. EPUC3M22es
dc.rights© 2023 The Author(s). Published by Elsevier Ltd.en
dc.rightsThis is an open access article under the CC BY-NC-ND licenseen
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.ecienciaIngeniería Industriales
dc.subject.otherConvection heat transferen
dc.subject.otherEccentric bayonet tubesen
dc.subject.otherNon-uniform heatingen
dc.subject.otherNumerical simulationen
dc.subject.otherSolar tower planten
dc.subject.otherThermal stressesen
dc.titleInfluence of eccentricity on the thermomechanical performance of a bayonet tube of a central solar receiveren
dc.typeresearch article*
dc.type.hasVersionVoR*
dspace.entity.typePublication
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
influence_ATE_2023.pdf
Size:
5.29 MB
Format:
Adobe Portable Document Format
Download
Collections
DITF - ISE - Artículos de Revistas Científicas