Solar-selective paint coating development. Final report

McKelvey, W D; Zimmer, P B; Lin, Ruey-Way

doi:10.2172/5140021

Cited by 3 publications

(2 citation statements)

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“…Paints applied by spray application tend to have lower concentration of solids and higher concentration of solvents, so that a paint coating applied with a spray can achieve thicknesses as low as 2 μm. 9 For industrial coatings such as used on automobile exteriors, multiple paint layers (e.g., primer, base, and enamel) are common, so that the total coating thickness of >200 μm is not unusual. As a result of the high absorbance of dyes and pigments mixed with the paints, these coatings often produce a high emissivity (ϵ > 0.9) at these standard thicknesses.…”

Section: Practical Methods Of Measuring Reflectivity and Emissivitymentioning

confidence: 99%

Review of thermal infrared polarimetry, part 2: experiment

Hagen

2022

Opt. Eng.

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After the discussion on thermal polarization theory from part 1 of this review, we now review practical methods for experimentally measuring infrared polarization properties. Starting with a model for thermal emission from inhomogeneous media, we discuss the complexities of paints and how to determine the ideal thickness of paints used for blackbody simulators. Another commonly used inhomogeneous material is anodized aluminum, and we provide an extensive discussion of its fascinating structure and its optical properties in the thermal infrared. Theoretical analysis and experimental measurements show how the peculiar properties of alumina in the longwave infrared region combine to create a material that has a surprisingly high emissivity, for optically smooth sapphire and highly inhomogeneous anodize-coated aluminum. To illustrate features of thermal polarization theory given in part 1 of this review, we also present a series of infrared polarization images, and demonstrate the use of a convenient reference source for thermal polarization testing.

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Section: Practical Methods Of Measuring Reflectivity and Emissivitymentioning

confidence: 99%

Review of thermal infrared polarimetry, part 2: experiment

Hagen

2022

Opt. Eng.

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“…Thickness-insensitive paint coating was developed with urethane, acrylic, and silicone binders. This type of coating combines the selective coatings currently developed and aluminum flake to provide a low emitting substrate, by varying the ratio of paint to flake, where the selective properties: α=0.90 and ε=0.31 were achieved [8]. After these results, the interest in such works has been increased to obtain more effective selective paints.…”

Section: Introductionmentioning

confidence: 99%

Selective Surfaces for Photo-Thermal Conversion for Medium Solar Temperature Applications

Haddad¹,

Hatti²,

Rahmoun³

et al. 2022

IJHT

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There are many effective technologies that have been developed in the field of renewable energy. In this context, this study covers a selective coating used in the photo-thermal conversion on macro-scale devices. The objective of this work is to optimize a silicon-based paint layer for solar application in the low temperature range (T<80℃) where the optimization thickness is found 21 µm. In order to apply the optimization layer (21 µm) in the solar devices that work in the medium temperature range (80℃<T<200℃), we propose to deposit a thin film of indium oxide using an ultrasonic spray chemical vapor deposition USCVD process to obtain finally a bilayer structure (silicon-based paint Thickness-Insensitive Selective Solar TISS / In2O3). The obtained bilayer structure was tested and characterized using spectroscopy of UV-VIS and IR, the last one was used in two modes: specular and diffuse reflection. The structural properties were investigated using the X-rays diffraction (XRD) and the morphological character was analyzed using Scanning Electron Microscope (SEM). In addition, the global results denote that the deposition of In2O3 layer improves the reflection capacity of the optimization layer (21 µm) from 8 to 11 in the NIR range.

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Chemical, structural and optical characterization of NiP chemical conversion coatings for photothermal absorption of solar energy

Papini¹

1986

Solar Energy Materials

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Solar-selective paint coating development. Final report

Cited by 3 publications

References 0 publications

Review of thermal infrared polarimetry, part 2: experiment

Review of thermal infrared polarimetry, part 2: experiment

Selective Surfaces for Photo-Thermal Conversion for Medium Solar Temperature Applications

Chemical, structural and optical characterization of NiP chemical conversion coatings for photothermal absorption of solar energy

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