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
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی (عمومی)
پیش نمایش صفحه اول مقاله
Numerical study of the optimum width of 2a diurnal double air-channel solar chimney
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-ω 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 L = 2 m and b = 0.125 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 0.1072 kg/s when it receives a beam solar radiation of 700 W/m2 and a diffuse solar radiation of 100 W/m2.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Energy - Volume 147, 15 March 2018, Pages 403-417
نویسندگان
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