Experimentally validated pore-scale numerical analysis for high-temperature (>700°C), high-efficiency (>90%) volumetric solar receivers

Concentrated solar thermal/power (CST/P) systems are evolving to operate at higher temperatures (i.e., above 700 °C) to drive advanced cycles and thermochemical processes. The development of high temperature, high efficiency solar receivers—as the highest temperature component in a CST/P system—repr...

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Autores principales:	Mohammadreza Sedighi, Robert A. Taylor, Ricardo Vasquez Padilla
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	High-temperature volumetric receivers Concentrated solar power CFD Ray-tracing analysis Packed beds Semi-transparent medium Engineering (General). Civil engineering (General) TA1-2040
Acceso en línea:	https://doaj.org/article/55ae3eed88d74a8586b5d8a2909a256c
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spelling	oai:doaj.org-article:55ae3eed88d74a8586b5d8a2909a256c2021-11-12T04:47:03ZExperimentally validated pore-scale numerical analysis for high-temperature (>700°C), high-efficiency (>90%) volumetric solar receivers2590-174510.1016/j.ecmx.2021.100127https://doaj.org/article/55ae3eed88d74a8586b5d8a2909a256c2021-12-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2590174521000520https://doaj.org/toc/2590-1745Concentrated solar thermal/power (CST/P) systems are evolving to operate at higher temperatures (i.e., above 700 °C) to drive advanced cycles and thermochemical processes. The development of high temperature, high efficiency solar receivers—as the highest temperature component in a CST/P system—represents a critical technical challenge in this evolution. Commercial solar receivers have been limited to operation below 600 °C due to (1) the historic trade-off between operation temperature and efficiency, and (2) the operating temperature limits of the liquid conventional heat transfer fluids. This paper investigates a gas-phase, packed-bed receiver, which is capable of addressing these limitations. To date, this novel design has shown promise for this application, but it has only been modelled on the macro-scale (i.e., a 1-D model). To obtain a more detailed understanding of this type of receiver, this paper presents the results of a novel 3-D pore-scale analysis of the proposed receiver to characterise the optical-thermo-fluid behaviour. To ensure the validity of this approach, experimental tests were conducted for a complex packed bed of spheres. The 3-D pore-scale analysis enables the development of innovative mechanisms to reduce radiosity losses. It also provides a deeper level of insight regarding the stagnation pressure loss caused by the inlet air-jet flows. The final results demonstrated that the pore-scale modifications of the design can yield an optimised packed-bed receiver with a maximum efficiency of ∼ 92 % (for a hot air outlet temperature well above 700 °C). This optimised receiver design represents a new pathway towards high-temperature solar receivers, which can operate at very high efficiency, to enable CST/P systems to utilise advanced power cycles.Mohammadreza SedighiRobert A. TaylorRicardo Vasquez PadillaElsevierarticleHigh-temperature volumetric receiversConcentrated solar powerCFDRay-tracing analysisPacked bedsSemi-transparent mediumEngineering (General). Civil engineering (General)TA1-2040ENEnergy Conversion and Management: X, Vol 12, Iss , Pp 100127- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	High-temperature volumetric receivers Concentrated solar power CFD Ray-tracing analysis Packed beds Semi-transparent medium Engineering (General). Civil engineering (General) TA1-2040
spellingShingle	High-temperature volumetric receivers Concentrated solar power CFD Ray-tracing analysis Packed beds Semi-transparent medium Engineering (General). Civil engineering (General) TA1-2040 Mohammadreza Sedighi Robert A. Taylor Ricardo Vasquez Padilla Experimentally validated pore-scale numerical analysis for high-temperature (>700°C), high-efficiency (>90%) volumetric solar receivers
description	Concentrated solar thermal/power (CST/P) systems are evolving to operate at higher temperatures (i.e., above 700 °C) to drive advanced cycles and thermochemical processes. The development of high temperature, high efficiency solar receivers—as the highest temperature component in a CST/P system—represents a critical technical challenge in this evolution. Commercial solar receivers have been limited to operation below 600 °C due to (1) the historic trade-off between operation temperature and efficiency, and (2) the operating temperature limits of the liquid conventional heat transfer fluids. This paper investigates a gas-phase, packed-bed receiver, which is capable of addressing these limitations. To date, this novel design has shown promise for this application, but it has only been modelled on the macro-scale (i.e., a 1-D model). To obtain a more detailed understanding of this type of receiver, this paper presents the results of a novel 3-D pore-scale analysis of the proposed receiver to characterise the optical-thermo-fluid behaviour. To ensure the validity of this approach, experimental tests were conducted for a complex packed bed of spheres. The 3-D pore-scale analysis enables the development of innovative mechanisms to reduce radiosity losses. It also provides a deeper level of insight regarding the stagnation pressure loss caused by the inlet air-jet flows. The final results demonstrated that the pore-scale modifications of the design can yield an optimised packed-bed receiver with a maximum efficiency of ∼ 92 % (for a hot air outlet temperature well above 700 °C). This optimised receiver design represents a new pathway towards high-temperature solar receivers, which can operate at very high efficiency, to enable CST/P systems to utilise advanced power cycles.
format	article
author	Mohammadreza Sedighi Robert A. Taylor Ricardo Vasquez Padilla
author_facet	Mohammadreza Sedighi Robert A. Taylor Ricardo Vasquez Padilla
author_sort	Mohammadreza Sedighi
title	Experimentally validated pore-scale numerical analysis for high-temperature (>700°C), high-efficiency (>90%) volumetric solar receivers
title_short	Experimentally validated pore-scale numerical analysis for high-temperature (>700°C), high-efficiency (>90%) volumetric solar receivers
title_full	Experimentally validated pore-scale numerical analysis for high-temperature (>700°C), high-efficiency (>90%) volumetric solar receivers
title_fullStr	Experimentally validated pore-scale numerical analysis for high-temperature (>700°C), high-efficiency (>90%) volumetric solar receivers
title_full_unstemmed	Experimentally validated pore-scale numerical analysis for high-temperature (>700°C), high-efficiency (>90%) volumetric solar receivers
title_sort	experimentally validated pore-scale numerical analysis for high-temperature (>700°c), high-efficiency (>90%) volumetric solar receivers
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/55ae3eed88d74a8586b5d8a2909a256c
work_keys_str_mv	AT mohammadrezasedighi experimentallyvalidatedporescalenumericalanalysisforhightemperature700chighefficiency90volumetricsolarreceivers AT robertataylor experimentallyvalidatedporescalenumericalanalysisforhightemperature700chighefficiency90volumetricsolarreceivers AT ricardovasquezpadilla experimentallyvalidatedporescalenumericalanalysisforhightemperature700chighefficiency90volumetricsolarreceivers
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Experimentally validated pore-scale numerical analysis for high-temperature (>700°C), high-efficiency (>90%) volumetric solar receivers

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