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

Montes, M.J., Guedez, R., Linares, J.I. y Reyes-Belmonte, M.A. . (2023) Advances in solar thermal power plants based on pressurised central receivers and supercritical power cycles. Energy Conversion and Management, Volume 293, 1 October 2023, 117454


Título Advances in solar thermal power plants based on pressurised central receivers and supercritical power cycles
Autor(es) Montes, M.J.
Guedez, R.
Linares, J.I.
Reyes-Belmonte, M.A.
Materia(s) Ingeniería Industrial
Abstract This 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.
Palabras clave Solar thermal power plant
Microchannel receiver
Radial configuration
Supercritical power cycle
Supercritical fluid
Pressurised gas
Editor(es) Elsevier
Fecha 2023-07-28
Formato application/pdf
Identificador bibliuned:DptoIE-ETSI-Articulos-Mjmontes-0006
http://e-spacio.uned.es/fez/view/bibliuned:DptoIE-ETSI-Articulos-Mjmontes-0006
DOI - identifier 10.1016/j.enconman.2023.117454
fecha fin de embargo 2025-07-29
ISSN - identifier 1879-2227
Nombre de la revista Energy Conversion and Management
Número de Volumen 293
Publicado en la Revista Energy Conversion and Management, Volume 293, 1 October 2023, 117454
Idioma eng
Versión de la publicación acceptedVersion
Tipo de recurso Article
Derechos de acceso y licencia http://creativecommons.org/licenses/by-nc-nd/4.0
info:eu-repo/semantics/embargoedAccess
Tipo de acceso Acceso embargado
Notas adicionales The registered version of this article, first published in Energy Conversion and Management, is available online at the publisher's website: Elsevier, https://doi.org/10.1016/j.enconman.2023.117454

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Creado: Mon, 22 Jan 2024, 21:54:53 CET