Economic and thermo-mechanical design of tubular sCO2 central-receivers

dc.affiliation.dptoUC3M. Departamento de Ingeniería Térmica y de Fluidoses
dc.affiliation.grupoinvUC3M. Grupo de Investigación: Ingeniería de Sistemas Energéticoses
dc.contributor.authorFernández Torrijos, María
dc.contributor.authorGonzález Gómez, Pedro Ángel
dc.contributor.authorSobrino Fernández, Celia
dc.contributor.authorSantana Santana, Domingo José
dc.contributor.funderComunidad de Madrides
dc.contributor.funderUniversidad Carlos III de Madrides
dc.description.abstractSupercritical CO2 central-receivers must withstand high temperatures and pressures combined with cyclic operation, which makes the solar receiver susceptible to creep-fatigue failure. In this work, a creep-fatigue analysis of a sCO2 Inconel 740H tubular receiver of a 2 MWe solar tower plant has been accomplished to study the influence of the tube size on the receiver and solar field design. A 2D numerical model of the tubular receiver that accounts for the thermal conduction in both radial and circumferential directions was developed to determine the sCO2 and wall temperature profile, which is crucial for the creep-fatigue calculations. The receiver flux distribution, which is an input to the model, was obtained with SolarPILOT, while a conventional recompression model was used to calculate the cycle efficiency and inlet temperature to the receiver. Comparison of the results of the 2D model with those of a 1D model showed that the 1D model overestimates the creep fatigue rupture time by two orders of magnitude. Furthermore, the efficiency and costs of the heliostat field and receiver were calculated for different receiver tube sizes. Smaller tubes allowed a higher maximum heat flux leading to smaller receiver and heliostat field designs, which resulted in higher overall efficiency of the power plant and lower material costs. For a design ensuring 25 year receiver lifetime the minimum sCO2 solar receiver cost, 345 €/kWth, was obtained for the smallest pipe diameter.en
dc.description.sponsorshipThis research is partially funded by the Spanish government under the projects RTI2018-096664-B-C21 (MICINN/FEDER, UE) and RED2018-102431-T (AEI, MICINN) and the fellowship “Programa de apoyo a la realizaci on de proyectos interdisciplinares de I+D para j ovenes investigadores de la Universidad Carlos III de Madrid 2019e2020” under the project ZEROGASPAIN-CM-UC3M (2020/00033/001), funded on the frame of “Convenio Plurianual Comunidad de Madrid-Universidad Carlos III de Madrid 2019e202”.en
dc.identifier.bibliographicCitationFernández-Torrijos, M., González-Gómez, P. A., Sobrino, C., & Santana, D. (2021). Economic and thermo-mechanical design of tubular sCO2 central-receivers.In Renewable Energy, 177, pp. 1087-1101en
dc.identifier.publicationtitleRENEWABLE ENERGYes
dc.relation.projectIDGobierno de España. RTI2018-096664-B-C21es
dc.relation.projectIDComunidad de Madrid. ZEROGASPAIN-CM-UC3Mes
dc.rights© 2021 Elsevieren
dc.rightsAtribución-NoComercial-SinDerivadas 3.0 España*
dc.rights.accessRightsopen accessen
dc.subject.ecienciaEnergías Renovableses
dc.subject.ecienciaIngeniería Mecánicaes
dc.subject.otherSolar receiveren
dc.subject.otherCreep-fatigue damageen
dc.subject.otherHeliostat fielden
dc.subject.otherThermal stressen
dc.titleEconomic and thermo-mechanical design of tubular sCO2 central-receiversen
dc.typeresearch article*
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