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Maximizing the power block efficiency of solar tower plants: Dual-pressure level steam generator

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dc.affiliation.dptoUC3M. Departamento de Ingeniería Térmica y de Fluidoses
dc.affiliation.grupoinvUC3M. Grupo de Investigación: Tecnologías Apropiadas para el Desarrollo Sosteniblees
dc.affiliation.grupoinvUC3M. Grupo de Investigación: Ingeniería de Sistemas Energéticoses
dc.contributor.authorGómez Hernández, Jesús
dc.contributor.authorGonzález Gómez, Pedro Ángel
dc.contributor.authorVilla Briongos, Javier
dc.contributor.authorSantana Santana, Domingo José
dc.contributor.funderMinisterio de Economía y Competitividad (España)es
dc.date.accessioned2021-04-13T11:22:12Z
dc.date.available2021-04-13T11:22:12Z
dc.date.issued2018-11-05
dc.description.abstractSolar tower plants (STP) are one of the most promising renewable technologies to substitute conventional power plants. To further increase its penetration in electricity markets, it is necessary to maximize its efficiency. This work addresses the challenge of increasing the inlet pressure up to 165 bar at the high pressure turbine (HPT) to improve the power block efficiency. Nowadays, these plants operate Rankine cycle with reheating using steam at 126 bar at the inlet of the HPT. This pressure is limited in current STP by the working temperatures of the molten salt, which range from 285 degrees C and 565 degrees C, the pinch point temperature difference in the evaporator and the current steam generator (SG) layout. A new steam generator design with dual-pressure level evaporation is proposed. The heat exchangers that form the SG are designed thermomechanically and the power cycle performance is analyzed using the first and second laws of thermodynamics. The results show that the novel dual-pressure level SG layout increases the power block efficiency from 44.14% to 44.64%. Assuming a market pricing scenario of two-tier tariff and a power purchase agreement price of 16.3c is an element of/kWh(e), the new SG layout yields an extra economic benefit of 623 k is an element of per year due to an increase of energy produced of 5.71 GWh(e),/year.en
dc.format.extent10
dc.identifier.bibliographicCitationGómez-Hernández, J., González-Gómez, P. A., Briongos, J. V. & Santana, D. (2018). Maximizing the power block efficiency of solar tower plants: Dual-pressure level steam generator. Applied Thermal Engineering, 144, pp. 583–592.en
dc.identifier.doihttps://doi.org/10.1016/j.applthermaleng.2018.08.054
dc.identifier.issn1359-4311
dc.identifier.publicationfirstpage583
dc.identifier.publicationlastpage592
dc.identifier.publicationtitleApplied Thermal Engineeringen
dc.identifier.publicationvolume144
dc.identifier.urihttps://hdl.handle.net/10016/32348
dc.identifier.uxxiAR/0000022836
dc.language.isoeng
dc.publisherElsevieren
dc.relation.projectIDGobierno de España. ENE2015-69486-Res
dc.rights© 2018 Elsevier Ltd.en
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.otherSolar tower planten
dc.subject.otherSteam generatoren
dc.subject.otherDual-pressure levelen
dc.subject.otherEfficiencyen
dc.subject.otherPower blocken
dc.subject.otherHeat-transferen
dc.subject.otherOptimizationen
dc.subject.otherReceiveren
dc.subject.otherDesignen
dc.subject.otherCosten
dc.subject.otherFluidsen
dc.titleMaximizing the power block efficiency of solar tower plants: Dual-pressure level steam generatoren
dc.typeresearch article*
dc.type.hasVersionAM*
dspace.entity.typePublication
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