Publication:
Dynamic modeling of a particle/supercritical CO₂ heat exchanger for transient analysis and control

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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.authorAlbrecht, K.J
dc.contributor.authorHo, C.K
dc.contributor.funderMinisterio de Educación, Cultura y Deporte (España)es
dc.date.accessioned2020-12-03T14:53:41Z
dc.date.available2020-12-03T14:53:41Z
dc.date.issued2018-09-15
dc.description.abstractA dynamic model of a moving packed-bed particle-to-sCO₂ heat exchanger and control system for concentrating solar power (CSP) applications is presented. The shell-and-plate heat-exchanger model allows for numerically investigating the transient operation and control of the heat addition to the power cycle in a particle-based CSP plant. The aim of the particle-to-sCO₂ heat exchanger is to raise the sCO₂ temperature to 700 degrees C at a pressure of 20 MPa. The control system adjusts both the particle and sCO₂ mass flow rates as well as an sCO₂ bypass to obtain the desired sCO₂ turbine inlet and particle outlet temperatures for a prescribed thermal duty. The control system is demonstrated for disturbances in particle and sCO₂ inlet temperatures as well as changes in thermal duty for part-load operation. A feed-forward control strategy that adjusts the sCO₂ and particle mass-flow rates as functions of measured inlet temperatures and a steady-state model solution was able to return the heat exchanger to the desired operating condition, but not without experiencing significant deviations in the sCO₂ turbine inlet and particle outlet temperature (> 40 degrees C) during the transient. To reduce both sCO₂ and particle temperature deviations, a feedback control strategy was investigated, where sCO₂ and particle mass-flow rates based on the steady-state model solution were corrected based on measured outlet temperature deviations. The feedback control strategy maintains sCO₂ turbine inlet and particle outlet temperature to within 16 degrees C of the set points with a three-minute settling time for step changes in inlet conditions and thermal duty. This finding demonstrates the possibility of dynamically dispatching next-generation particle-based CSP plants driving sCO₂ power cycles.en
dc.description.sponsorshipThe present work has been funded by DOE SunShot Program (SuNLaMP-0000000-1507), and the scholarship FPU14/04941 of the Spanish Ministry of Education, Culture and Sport. Sandia National Laboratories is a multimission laboratory managed and operated by National Technology and Engineering Solutions of Sandia LLC, a wholly owned subsidiary of Honeywell International Inc. for the U.S. Department of Energy’s National Nuclear Security Administration under contract DENA0003525.en
dc.format.extent28
dc.identifier.bibliographicCitationFernández-Torrijos, M., Albrecht, K.J., Hob, C.K. (2018). Dynamic modeling of a particle/supercritical CO2 heat exchanger for transient analysis and control, Applied Energy, v. 226, pp. 595-606en
dc.identifier.doihttps://doi.org/10.1016/j.apenergy.2018.06.016
dc.identifier.issn0306-2619
dc.identifier.publicationfirstpage595
dc.identifier.publicationlastpage606
dc.identifier.publicationtitleApplied Energyen
dc.identifier.publicationvolume226
dc.identifier.urihttps://hdl.handle.net/10016/31535
dc.identifier.uxxiAR/0000022251
dc.language.isoeng
dc.publisherElsevieren
dc.relation.projectIDGobierno de España. FPU14/04941
dc.rightsAtribución-NoComercial-SinDerivadas 3.0 España
dc.rights© 2018 Elsevier Ltd.en
dc.rights.accessRightsopen access
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.subject.ecienciaIngeniería Industriales
dc.subject.otherHeat exchangeren
dc.subject.otherShell-and-plateen
dc.subject.otherFeed-forward controlen
dc.subject.otherFeedback controlen
dc.subject.otherSupercritical CO2en
dc.subject.otherFalling particle receiveren
dc.titleDynamic modeling of a particle/supercritical CO₂ heat exchanger for transient analysis and controlen
dc.typeresearch article*
dc.type.hasVersionAM*
dspace.entity.typePublication
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