کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
659617 | 1458115 | 2010 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The profile optimization of periodic nano-structures for wavelength-selective thermophotovoltaic emitters
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
This work demonstrates a systematic and efficient way of searching two-dimensional periodic nano-structures with wavelength-selective radiative properties appealing to thermophotovoltaic emitters. The orthogonal array from the Taguchi method benefits the optimization of structure depth, periods, and filling ratios among 1024 combinations. The spectral emittance from optimized structures is above 0.9 at wavelengths between 1.0 and 2.0 μm, but the emittance is below 0.2 at wavelengths between 2.0 and 4.0 μm. Furthermore, such spectral emittance characteristics can be kept for wide ranges of emission direction and either polarization. Representative emittance spectra from an example of convex rectangular structures are plotted and compared to those of concave structures in previous works. The comparison shows that radiative properties of convex structures are dominated by cavity resonances while those of concave structures are the interplay of multiple mechanisms. All numerical results are obtained from validated programs based on the rigorous coupled-wave analysis.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 53, Issues 23â24, November 2010, Pages 5542-5551
Journal: International Journal of Heat and Mass Transfer - Volume 53, Issues 23â24, November 2010, Pages 5542-5551
نویسندگان
Y.-B. Chen, K.-H. Tan,