TY - JOUR
T1 - The effect of particles size distribution on aesthetic and thermal performances of polydisperse TiO 2 pigmented coatings
T2 - Comparison between numerical and experimental results
AU - Baneshi, Mehdi
AU - Gonome, Hiroki
AU - Komiya, Atsuki
AU - Maruyama, Shigenao
PY - 2012/5
Y1 - 2012/5
N2 - A new approach in designing pigmented coatings considering both visual and thermal concerns was introduced by authors in previous works. The objective was to design a pigmented coating with dark appearance which can stay cool while exposed to sunlight. This behavior can be achieved by coating a typical black substrate with a pigmented coating with controlled size and concentration of particles and coating thickness. In present work, the spectral behaviour of polydisperse TiO 2 pigmented coatings was studied. The radiative properties of polydisperse TiO 2 powders were evaluated and the radiative transfer in the pigmented coating was modelled using the radiation element method by ray emission model (REM 2). The effects of particles size distribution on spectral reflectivity, optimization parameter, and color coordinates were discussed. The results of numerical calculation were validated by experimental reflectivity measurements of several TiO 2 pigmented coating samples made from two different TiO 2 powders with different size distributions of particles. The results show that our model can reasonably predict the spectral reflectivity of TiO 2 pigmented coating samples. Moreover, the results of optimized monodisperse TiO 2 pigmented coatings were again validated.
AB - A new approach in designing pigmented coatings considering both visual and thermal concerns was introduced by authors in previous works. The objective was to design a pigmented coating with dark appearance which can stay cool while exposed to sunlight. This behavior can be achieved by coating a typical black substrate with a pigmented coating with controlled size and concentration of particles and coating thickness. In present work, the spectral behaviour of polydisperse TiO 2 pigmented coatings was studied. The radiative properties of polydisperse TiO 2 powders were evaluated and the radiative transfer in the pigmented coating was modelled using the radiation element method by ray emission model (REM 2). The effects of particles size distribution on spectral reflectivity, optimization parameter, and color coordinates were discussed. The results of numerical calculation were validated by experimental reflectivity measurements of several TiO 2 pigmented coating samples made from two different TiO 2 powders with different size distributions of particles. The results show that our model can reasonably predict the spectral reflectivity of TiO 2 pigmented coating samples. Moreover, the results of optimized monodisperse TiO 2 pigmented coatings were again validated.
KW - Aesthetic performance
KW - NIR
KW - Pigmented coating
KW - Polydisperse particles
KW - Reflectivity
KW - Titanium dioxide
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U2 - 10.1016/j.jqsrt.2012.02.006
DO - 10.1016/j.jqsrt.2012.02.006
M3 - Article
AN - SCOPUS:84858155621
SN - 0022-4073
VL - 113
SP - 594
EP - 606
JO - Journal of Quantitative Spectroscopy and Radiative Transfer
JF - Journal of Quantitative Spectroscopy and Radiative Transfer
IS - 8
ER -