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dc.contributor.author
Patil, Vikas R.
dc.contributor.author
Kiener, Fabio
dc.contributor.author
Grylka, Adrian
dc.contributor.author
Steinfeld, Aldo
dc.date.accessioned
2021-01-06T13:45:59Z
dc.date.available
2020-12-24T03:43:10Z
dc.date.available
2021-01-06T13:45:59Z
dc.date.issued
2021-01-15
dc.identifier.issn
0038-092X
dc.identifier.issn
1471-1257
dc.identifier.other
10.1016/j.solener.2020.11.045
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/458501
dc.identifier.doi
10.3929/ethz-b-000458501
dc.description.abstract
Concentrated solar energy can be used as the source of high-temperature heat for industrial processes, but the challenge is to design a solar receiver that can effect such a thermal conversion efficiently. This study reports on the engineering design and experimental testing of a 5 kW solar cavity-receiver containing a reticulated porous ceramic (RPC) structure that can absorb high-flux radiation volumetrically and heat up, by convection, an air flow serving as the heat transfer fluid. The thermal performance, characterized by the thermal efficiency and the air outlet temperature, was determined experimentally for four parameters, namely: RPC material (silicon-infused silicon carbide or SiSiC, alumina, and ceria), mean pore size (range 0.8–2.5 mm, corresponding to 10–30 pores per inch or PPI, at 0.90 porosity), solar concentration ratio (range 1965–3900 suns over a 4 cm-diameter cavity aperture, supplied by a high-flux solar simulator), and air mass flow rate (range 2–10 kg/h). Thermal efficiencies between 0.22 and 0.69 were obtained at steady-state air outlet temperatures ranging from 1160 to 450 °C. Larger pores enhance heat transfer while variable porosity across the RPC can reduce temperature gradients and potentially contribute to the design optimization. The highest efficiency of 0.69 was achieved by the SiSiC 10 PPI cavity at an air outlet temperature of 1133 °C and air mass flow rate of 9.9 kg/h. The solar receiver design proved to deliver a high-temperature air flow (>1000 °C) with a reasonably high thermal efficiency (>0.65).
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
Elsevier
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/4.0/
dc.subject
Solar
en_US
dc.subject
Thermal
en_US
dc.subject
Concentrated
en_US
dc.subject
Volumetric
en_US
dc.subject
Receiver
en_US
dc.subject
Cavity
en_US
dc.subject
Process heat
en_US
dc.subject
High temperature
en_US
dc.title
Experimental testing of a solar air cavity-receiver with reticulated porous ceramic absorbers for thermal processing at above 1000 °C
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 4.0 International
dc.date.published
2020-12-13
ethz.journal.title
Solar Energy
ethz.journal.volume
214
en_US
ethz.journal.abbreviated
Sol. energy
ethz.pages.start
72
en_US
ethz.pages.end
85
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.publication.place
Amsterdam
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02130 - Dep. Maschinenbau und Verfahrenstechnik / Dep. of Mechanical and Process Eng.::02668 - Inst. f. Energie- und Verfahrenstechnik / Inst. Energy and Process Engineering::03530 - Steinfeld, Aldo / Steinfeld, Aldo
en_US
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02130 - Dep. Maschinenbau und Verfahrenstechnik / Dep. of Mechanical and Process Eng.::02668 - Inst. f. Energie- und Verfahrenstechnik / Inst. Energy and Process Engineering::03530 - Steinfeld, Aldo / Steinfeld, Aldo
ethz.date.deposited
2020-12-24T03:43:14Z
ethz.source
SCOPUS
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2021-01-06T13:46:10Z
ethz.rosetta.lastUpdated
2022-03-29T04:42:37Z
ethz.rosetta.versionExported
true
ethz.COinS
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