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Advances in solar thermal power plants based on pressurised central receivers and supercritical power cycles

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dc.contributor.authorGuedez Mata, Rafael
dc.contributor.authorLinares Hurtado, José Ignacio
dc.contributor.authorReyes Belmonte, Miguel Ángel
dc.contributor.authorMontes Pita, María José
dc.date.accessioned2024-05-20T11:40:33Z
dc.date.available2024-05-20T11:40:33Z
dc.date.issued2023-07-28
dc.description.abstractThis work addresses the comparative thermo-economic study of different configurations of solar thermal power plants, based on supercritical power cycles and pressurised central receiver systems. For all the cases examined, two innovations are introduced in the solar subsystem, compared to other similar studies. Firstly, the heat transfer fluid in the receiver is either a pressurised gas or a supercritical fluid. Secondly, the receiver is composed of compact structures performing as absorber panels, arranged in a radial configuration. The investigation considers different supercritical CO2 recompression cycles of 50 MWe, including a novel proposal of a directly coupled cycle with heat input downstream of the turbine. Furthermore, the study evaluates different heat transfer fluids in the receiver, specifically CO2, N2, and He, concluding that the former is preferred due to its better thermal performance. The main results show that an increase in the receiver inlet pressure yields to a reduction in its size, favouring the thermal efficiency but penalising the optical efficiency of the solar field. Therefore, optimal working pressures may exist for each configuration, depending on the operating temperature. When comparing the optimal configurations, it is observed that the plant based on the intercooling cycle demonstrates the highest overall efficiency, reaching 32.05%. At last, an economic analysis is conducted to assess the viability of the identified optimal configurations. In this regard, the plant based on the partial-cooling cycle exhibits the lowest levelised cost of electricity at 0.15 $/kWh. This is primarily due to its lower investment cost. The innovative directly coupled cycle follows closely with a cost of 0.17 $/kWh, driven by its high electricity production resulting from its low self-consumption.en
dc.description.versionversión final
dc.identifier.doihttp://doi.org/10.1016/j.enconman.2023.117454
dc.identifier.issn1879-2227
dc.identifier.urihttps://hdl.handle.net/20.500.14468/12402
dc.journal.titleEnergy Conversion and Management
dc.journal.volume293
dc.language.isoen
dc.publisherElsevier
dc.relation.centerE.T.S. de Ingenieros Industriales
dc.relation.departmentIngeniería Energética
dc.rightsinfo:eu-repo/semantics/embargoedAccess
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/deed.es
dc.subject.keywordsSolar thermal power plant
dc.subject.keywordsMicrochannel receiver
dc.subject.keywordsRadial configuration
dc.subject.keywordsSupercritical power cycle
dc.subject.keywordsSupercritical fluid
dc.subject.keywordsPressurised gas
dc.titleAdvances in solar thermal power plants based on pressurised central receivers and supercritical power cycleses
dc.typejournal articleen
dc.typeartículoes
dspace.entity.typePublication
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relation.isAuthorOfPublication.latestForDiscoverybe2fc6ee-eb5b-4c79-9371-512b1eb6d042
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