Advanced Thin Film Photo‐Thermal Materials and Applications

Chen, Feiliang; Lü, Wei

doi:10.1002/9781119407348.ch8

Cited by 2 publications

(1 citation statement)

References 87 publications

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“…Solar selective absorbers (SSA) are used in the structure of the external walls or roof of a building or dome of a building stairwell to convert sunlight into heat energy to force convection, drawing cooler air into the building, which saves on electricity for air-conditioning [2]. In order to maximize the absorption of solar energy, the surface of the collector absorber is currently black or blue [3][4][5][6][7][8][9][10][11][12][13][14][15][16]. However, the necessity of using black or blue SSAs on building roofs and facades limits their aesthetic appeal and makes architectural integration into the buildings more difficult.…”

Section: Introductionmentioning

confidence: 99%

Design, Fabrication and Analysis for Al2O3/Ti/Al2O3 Colored Solar Selective Absorbers for Building Applications

Lai¹,

Li²

2022

Coatings

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A good solar selective absorber (SSA) used in building applications must have good color brightness rendering, an excellent photo–thermal conversion efficiency (PTCE) and a long life. The optical thin film design plays an important role before the coating of the optical thin films. In this study, for fabricating a good colored SSA (CSSA), the optical properties and color distribution of Al2O3/Ti/Al2O3 SSA were calculated to obtain the best design. It was found that the color distribution of Al2O3/Ti/Al2O3 SSA with a PTCE in excess of 90% was wide and included all colors, such as red, orange, yellow, green, blue, purple and white. Five colored Al2O3/Ti/Al2O3 solar selective absorbers were designed and fabricated and their performances were analyzed. The best PTCE of a fabricated sample and its thermal emittance efficiency were 93.2% and 7.1%, respectively. The peak values of the measured optical reflectance in the visible region for the five fabricated CSSAs were all greater than 10%. Their lifetime could be very long because the temperature difference between thermal stability of more than 450 °C and the working temperature of less than 150 °C was up to 300 °C. After annealing at 550 °C, the Al2O3–Ti system formed a compound structure of AlTiO5. The Al2O3/Ti/Al2O3 film performances, including the optical properties in the wavelength range of 0.25 to 25 μm, structure, morphology, adhesion, cross-sectional images, AFM image, PTCE, thermal emittance efficiency and thermal stability, were measured and analyzed in detail, and met the characteristic requirements of colored solar absorber films.

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Section: Introductionmentioning

confidence: 99%

Design, Fabrication and Analysis for Al2O3/Ti/Al2O3 Colored Solar Selective Absorbers for Building Applications

Lai¹,

Li²

2022

Coatings

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Big Data Analysis, Design, Effect Fabrication, and Properties Analysis of SiO2/Cr/SiO2 Colored Solar Selective Absorbers with High PTCE and Chromaticity for Building Applications

Lai,

Chen

2024

Materials

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In today’s era of rapid computing, advanced big data analytics enables precise results and efficient trend analysis. By leveraging these tools, the influence of various film thicknesses of Colored Solar Selective Absorbers (CSSAs) on solar absorption efficiency (αs) and chromaticity was investigated. A clear and visually informative Chromaticity Coordinate Distribution (CCD) versus αs diagram was constructed within the CIE xy chromaticity diagram, establishing a correlation between chromaticity and αs. Photo-Thermal Conversion Efficiency (PTCE) ≈ αs − 2% when αs ≥ 90%. Subsequently, utilizing colored CCD-αs diagrams, seven SiO2/Cr/SiO2 CSSAs, each with unique colors and αs, were designed, fabricated, and subjected to an analysis of their optical and material properties. We explored the influence of oxygen atom infiltration into the CSSA, leading to the oxidation of the Cr layer and consequent alterations in CSSA properties. Additionally, this study delved into analyzing the effect of substrate surface roughness on the oxidation resistance, αs, color, and corrosion resistance of CSSAs.

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Advanced Thin Film Photo‐Thermal Materials and Applications

Cited by 2 publications

References 87 publications

Design, Fabrication and Analysis for Al2O3/Ti/Al2O3 Colored Solar Selective Absorbers for Building Applications

Design, Fabrication and Analysis for Al2O3/Ti/Al2O3 Colored Solar Selective Absorbers for Building Applications

Big Data Analysis, Design, Effect Fabrication, and Properties Analysis of SiO2/Cr/SiO2 Colored Solar Selective Absorbers with High PTCE and Chromaticity for Building Applications

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