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Hybrid storage solution steam-accumulator combined to concrete-block to save energy during startups of combined cycles

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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.authorGonzález Gómez, Pedro Ángel
dc.contributor.authorLaporte Azcué, Marta
dc.contributor.authorFernández Torrijos, María
dc.contributor.authorSantana Santana, Domingo José
dc.contributor.funderMinisterio de Ciencia e Innovación (España)es
dc.contributor.funderMinisterio de Educación, Cultura y Deporte (España)es
dc.contributor.funderComunidad de Madrides
dc.date.accessioned2022-04-18T15:02:35Z
dc.date.available2022-04-18T15:02:35Z
dc.date.issued2022-02-01
dc.description.abstractThis work presents a novel steam accumulator and concrete-block storage system (SACSS) to recover part of the energy lost through the steam cycle side during startups of combined cycle power plants (CCPPs). The steam accumulators are integrated with sensible-heat concrete storage to provide superheated steam resulting then to a higher efficiency and safer steam turbine operation compared with systems based only on saturated steam. An economic analysis is performed considering two different scenarios: i) a CCPP able to execute fast startups using a Benson-type heat recovery steam generator (HRSG) and ii) a CCPP operated with conventional startups which employs a typical drum-type HRSG. It is worth mentioning that the second scenario is based on measured data. The economic optimization of the SACSS is carried out focusing in four design variables: number of steam accumulator units, storage pressure, concrete-block length and outer concrete diameter. The optimum solution presents a net present value of 4.45 M€ and a payback period of 3 years for the CCPP suitable for fast startups. For the CCPP operated with conventional startups, a net present value of 2.53 M€ and a payback period of 3.4 years are obtained. The net present value grows around 60 % in both cases if the benefits from carbon credits are considered. In addition to the efficiency improvement, the SACSS could be used to preheat critical sections of the heat recovery steam generators, reducing the thermal stress and the fatigue damage during fast startups. Finally, the emissions avoided thanks to SACSS are estimated to be around 3 640 and 2 175 tons of CO2 per year, for fast and conventional startup cases, respectively.en
dc.description.sponsorshipThis research is partially funded by the Spanish government under the project RTI2018-096664-B-C21 (MICINN/FEDER, UE), the fellowship "Ayuda a la investigación en energía y medio ambiente" of the Iberdrola España Foundation, the scholarship "Ayudas para la formación del profesorado universitario" (FPU-02361) awarded by the Spanish Ministerio de Educación, Cultura y Deporte (MECD), and the fellowship "Programa de apoyo a la realización de proyectos interdisciplinares de I + D para jóvenes investigadores de la Universidad Carlos III de Madrid 2019-2020" under the project ZEROGASPAIN-CM-UC3M (2020/00033/002), funded on the frame of "Convenio Plurianual Comunidad de Madrid-Universidad Carlos III de Madrid 2019-2022".en
dc.format.extent17es
dc.identifier.bibliographicCitationEnergy Conversion and Management vol. 253, Feb. 2022, 115168, 17 p.en
dc.identifier.doihttps://doi.org/10.1016/j.enconman.2021.115168
dc.identifier.issn0196-8904
dc.identifier.issn1879-2227 (online)
dc.identifier.publicationfirstpage1es
dc.identifier.publicationissue115168es
dc.identifier.publicationlastpage17es
dc.identifier.publicationtitleENERGY CONVERSION AND MANAGEMENTen
dc.identifier.publicationvolume253es
dc.identifier.urihttps://hdl.handle.net/10016/34565
dc.identifier.uxxiAR/0000029227
dc.language.isoengen
dc.publisherElsevier Ltd.en
dc.relation.projectIDGobierno de España. RTI2018-096664-B-C21es
dc.relation.projectIDComunidad de Madrid. ZEROGASPAIN-CM-UC3Mes
dc.rights© 2022 The Authors. Published by Elsevier Ltd.en
dc.rightsThis is an open access article under the CC BY licenseen
dc.rightsAtribución 3.0 España*
dc.rights.accessRightsopen accessen
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/es/*
dc.subject.ecienciaEnergías Renovableses
dc.subject.ecienciaIngeniería Industrialen
dc.subject.ecienciaIngeniería Mecánicaes
dc.subject.otherCombined cyclesen
dc.subject.otherThermal energy storageen
dc.subject.otherFast startupen
dc.subject.otherEfficiency improvementen
dc.subject.otherDynamic simulationen
dc.titleHybrid storage solution steam-accumulator combined to concrete-block to save energy during startups of combined cyclesen
dc.typeresearch article*
dc.type.hasVersionVoR*
dspace.entity.typePublication
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