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

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dc.contributor.author Fernández Torrijos, María
dc.contributor.author Albrecht, K.J
dc.contributor.author Ho, C.K
dc.date.accessioned 2020-12-03T14:53:41Z
dc.date.available 2020-12-03T14:53:41Z
dc.date.issued 2018-09-15
dc.identifier.bibliographicCitation Fernández-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. 595-606
dc.identifier.issn 0306-2619
dc.identifier.uri http://hdl.handle.net/10016/31535
dc.description.abstract A 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.
dc.description.sponsorship The 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.
dc.format.extent 28
dc.language.iso eng
dc.publisher Elsevier
dc.rights Atribución-NoComercial-SinDerivadas 3.0 España
dc.rights © 2018 Elsevier Ltd.
dc.rights.uri http://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.subject.other Heat exchanger
dc.subject.other Shell-and-plate
dc.subject.other Feed-forward control
dc.subject.other Feedback control
dc.subject.other Supercritical CO2
dc.subject.other Falling particle receiver
dc.title Dynamic modeling of a particle/supercritical CO₂ heat exchanger for transient analysis and control
dc.type article
dc.subject.eciencia Ingeniería Industrial
dc.identifier.doi https://doi.org/10.1016/j.apenergy.2018.06.016
dc.rights.accessRights openAccess
dc.relation.projectID Gobierno de España. FPU14/04941
dc.type.version acceptedVersion
dc.identifier.publicationfirstpage 595
dc.identifier.publicationlastpage 606
dc.identifier.publicationtitle Applied Energy
dc.identifier.publicationvolume 226
dc.identifier.uxxi AR/0000022251
dc.contributor.funder Ministerio de Educación, Cultura y Deporte (España)
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