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Accelerated Ageing of Solar Reciever Coatings: Experimental Results for T91 and VM12 Steel Substrates

Caron, Simon and Sutter, Florian and Algner, Niels and Esteller, Marcos and Binyamin, Y. and Baidosi, M. and Kenigsberg, A. and Agüero, A. and Fähsing, D. and Hildebrandt, C. (2018) Accelerated Ageing of Solar Reciever Coatings: Experimental Results for T91 and VM12 Steel Substrates. In: AIP Conference Proceedings, 2033 (230002). SolarPACES 2017, 26.-29. Sep. 2017, Santiago de Chile. DOI: 10.1063/1.5067230

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Official URL: https://aip.scitation.org/doi/10.1063/1.5067230


This paper reports experimental results for accelerated ageing test campaigns performed on four different solar receiver coatings applied on T91 and VM12 steel substrates. VM12 tubular samples are exposed at a dish test facility in order to perform thermal cycles under concentrated solar flux. No significant optical degradation could be observed on coated samples after 100 thermal cycles (50 hours at 650 °C), while bare and polished reference substrates oxidized during testing. Three solar receiver coatings achieved a stable solar weighted absorptance αs above 95 % after exposure. A selective coating further showed a thermal emittance of 25 % at 650 °C, instead of 65-75 % for non-selective coatings, thus achieving a thermal efficiency above 90 % at 250 kW/m2, instead of 85 % for non-selective coatings. T91 coated metal coupons were tested in four standard climate test chambers for condensation, damp heat, humidity freeze and neutral salt spray. Two non-selective coatings passed all climate tests without significant optical degradation, while the selective coating did not pass the neutral salt spray test due to severe corrosion.

Item URL in elib:https://elib.dlr.de/115407/
Document Type:Conference or Workshop Item (Speech)
Title:Accelerated Ageing of Solar Reciever Coatings: Experimental Results for T91 and VM12 Steel Substrates
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Caron, SimonSimon.Caron (at) dlr.dehttps://orcid.org/0000-0002-7699-8108
Sutter, FlorianFlorian.Sutter (at) dlr.deUNSPECIFIED
Algner, NielsNiels.Algner (at) dlr.deUNSPECIFIED
Binyamin, Y.Brightsource IndustriesUNSPECIFIED
Baidosi, M.Brightsource IndustriesUNSPECIFIED
Kenigsberg, A.Brightsource IndustriesUNSPECIFIED
Hildebrandt, C.Fraunhofer ISEUNSPECIFIED
Date:8 November 2018
Journal or Publication Title:AIP Conference Proceedings
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
DOI :10.1063/1.5067230
Keywords:Durability, High temperature, Receiver coatings, Solar absorptance, Thermal emittance
Event Title:SolarPACES 2017
Event Location:Santiago de Chile
Event Type:international Conference
Event Dates:26.-29. Sep. 2017
HGF - Research field:Energy
HGF - Program:Renewable Energies
HGF - Program Themes:Concentrating Solar Thermal Technology
DLR - Research area:Energy
DLR - Program:E SW - Solar and Wind Energy
DLR - Research theme (Project):E - Impact of Desert Environment
Location: Köln-Porz
Institutes and Institutions:Institute of Solar Research > Qualification
Deposited By: Kruschinski, Anja
Deposited On:20 Nov 2017 14:04
Last Modified:08 Nov 2019 03:00

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