کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6681338 | 1428079 | 2018 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Complementary enhanced solar thermal conversion performance of core-shell nanoparticles
ترجمه فارسی عنوان
بهبود عملکرد گرمایی خورشیدی از نانوذرات هسته پوسته افزایش یافته است
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کلمات کلیدی
تبدیل حرارتی خورشیدی، نانوذرات هسته پوسته، دامنه اختیاری محدود خواص نوری،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
مهندسی انرژی و فناوری های برق
چکیده انگلیسی
In this study, the properties of various types of core-shell nanoparticles (NPs) were evaluated using the finite difference time domain (FDTD) method towards the enhancement of solar absorption performance. Results showed that the resonance wavelength of SiO2@Au NPs lay in the 540-900â¯nm range, covering the near-infrared and visible regions. The resonance wavelength of SiO2@Ag NPs lay in the 390-830â¯nm range, covering the entire visible region. SiO2@Au nanofluid with a core-shell ratio of Ïâ¯=â¯0.2 exhibited the highest solar absorption efficiency with 64% less Au consumption compared to pure Au NPs. For mixed nanofluids, the mixtures featuring core-shell ratios of 0.1 and 0.6 with mixing ratios of 0.5 for SiO2@Au and 0.6 for SiO2@Ag gave the highest absorption efficiencies. In addition, the peak solar absorption efficiency of a mixed nanofluid of SiO2@Au (Ïâ¯=â¯0.1) and SiO2@Ag (Ïâ¯=â¯0.4) with a mixing ratio of 0.58 was as high as 94.4%. Solar thermal conversion experiments revealed that, under the same conditions, a Au-decorated SiO2 nanofluid showed a comparable efficiency to the calculated solar absorption efficiency of the SiO2@Au core-shell nanofluid (â¼95.2%); it was as high as 95.9%, higher than those of Au NPs and SiO2 NPs. These results showed that adjusting the core-shell ratios and tuning the mixing ratios of different nanofluids are two efficient methods to enhance the solar absorption efficiencies of SiO2@Au and SiO2@Ag NPs under the optimal conditions.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Energy - Volume 211, 1 February 2018, Pages 735-742
Journal: Applied Energy - Volume 211, 1 February 2018, Pages 735-742
نویسندگان
Meijie Chen, Yurong He, Xinzhi Wang, Yanwei Hu,