کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8072147 | 1521403 | 2018 | 43 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Numerical study of the optimum width of 2a diurnal double air-channel solar chimney
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
انرژی (عمومی)
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
A conjugate heat transfer analysis of a double air channel solar chimney (SC-DC) aiming to determine the configuration that maximizes the mass flow rate of the system is presented. The design modifications consisted on two geometrical parameters: 1) the separation between the absorber wall and the glass covers that form the air channels (b), and 2) the height of the system (L). A code based on the Finite Volume Method was developed and a k-Ï turbulence model was used to model air turbulence in the SC-DC. The code was validated and it showed a good agreement with experimental data reported in the literature. We found that the optimal configuration of the SC-DC under the considered conditions is Lâ¯=â¯2â¯m and bâ¯=â¯0.125â¯m. The optimum L of the SC-DC is similar to the value reported for a conventional chimney, whereas the optimum b is smaller than the one of a conventional chimney. The optimal configuration of the SC-DC had a thermal efficiency of 38.5% and a mass flow rate of 0.1072â¯kg/s when it receives a beam solar radiation of 700â¯W/m2 and a diffuse solar radiation of 100â¯W/m2.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Energy - Volume 147, 15 March 2018, Pages 403-417
Journal: Energy - Volume 147, 15 March 2018, Pages 403-417
نویسندگان
I. Zavala-Guillén, J. Xamán, I. Hernández-Pérez, I. Hernández-Lopéz, M. Gijón-Rivera, Y. Chávez,