Accelerated ageing of solar receiver coatings: Experimental results for T91 and VM12 steel substrates

Caron, Simon; Sutter, Florian; Algner, Niels; Esteller, Marcos; Binyamin, Yaniv; Baidossi, Mubeen; Kenigsberg, Avraham; Agüero, Alina; Fähsing, Diana; Hildebrandt, Christina

doi:10.1063/1.5067230

Cited by 8 publications

(5 citation statements)

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“…Optical characterization was conducted at room temperature using two spectrophotometers. The spectral measurements were weighted to derive solar weighted absorptance and thermal emittance (see [7] for a more detailed description).…”

Section: Methodsmentioning

confidence: 99%

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Improving optical properties of diffusion-based absorber coatings for CSP tower systems

Meißner

Oskay

Fähsing

et al. 2019

SOLARPACES 2018: International Conference on Concentrating Solar Power and Chemical Energy Systems

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In the course of energy transition the development of sustainable, efficient and renewable technologies for power generation providing base load supply is of crucial importance. CSP plants have great potential to fulfil all these requirements. However, mitigation of molten salt corrosion inside the absorber tube as well as improvement of optical properties on its outside are key challenges and part of ongoing developments. For this purpose, a Cr-Mn-diffusion absorber coating has been developed and is presented together with its improved version, an organic-based bilayer system. This study focusses on the continuous improvement of optical properties in terms of thermal efficiency (solar absorption and emittance) as well as qualification of both coatings with regards to long term durability (isothermal and thermocyclic stability).

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Section: Methodsmentioning

confidence: 99%

“…Improved solar absorptance of the bilayer concept compared to Cr-Mn-coating in the initial stateImprovement PlanHowever, the assessment of optical properties depends on both solar absorptance α s as well as thermal emittance ε th . The two values can be combined into a single performance criterion[7,8], thermal efficiency η coating , defined in Eq. (1).…”

mentioning

confidence: 99%

Improving optical properties of diffusion-based absorber coatings for CSP tower systems

Meißner

Oskay

Fähsing

et al. 2019

SOLARPACES 2018: International Conference on Concentrating Solar Power and Chemical Energy Systems

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“…It is calculated as shown in Eq. 1 [3]. ρhem denominates the spectral hemispherical reflectance at the wavelength λ (nm) while Gsol represents the reference spectrum for solar direct normal irradiance (W/m2.nm).…”

Section: Solar Absorptancementioning

confidence: 99%

“…Hence, it is calculated weighting the spectral hemispherical reflectance ρhem at the wavelength λ (nm) with the ideal black body exitance EBB (W/m2.nm) representing the reference spectrum such as formulated in Eq. 2 [3].…”

Section: Thermal Emittancementioning

confidence: 99%

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Spectral characterisation of high temperature solar absorber coatings

Herding

Caron²,

Nickich

et al. 2018

2018 7th International Energy and Sustainability Conference (IESC)

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Four newly developed solar absorber coatings are to be evaluated with the help of thermal cycling and optical characterisation. An initial round robin campaign reveals the need of a standardisation of the calculation procedure of solar absorptance and thermal emittance derived from optical measurements at room temperature. The implementation of a common processing of spectral hemispherical reflectance values enables a reduction of standard deviations to 0.2%, both for solar absorptance and thermal emittance. The calculation procedure proposed within this paper corresponds to DIN EN 22975-3 and enables the verification of measurement reproducibility according to ASTM E 691 -05.

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