کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
659852 1458117 2010 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The effective thermal properties of solid foam beds: Experimental and estimated temperature profiles
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
The effective thermal properties of solid foam beds: Experimental and estimated temperature profiles
چکیده انگلیسی

The effective radial heat conductivity of a solid foam packing and the wall heat transfer coefficient are determined under fluid flow conditions typical of catalytic reactors. A detailed 2-D heterogeneous model is phase-averaged in order to rigorously define lumped heat transfer parameters. The resulting pseudo-homogeneous model involves two fitting parameters only and it is successfully compared with experiments. First, experiments with packed extrudates validate the approach in comparison with known results. A second experiment with solid foams (polyurethane and SiC) allows correlating the radial heat conductivity to the nature of the solid, its morphology and fluid flow characteristics. The method is inspired from the correlations for particles and seems very promising. Conversely, determining the wall heat transfer coefficient yields only an average value (110 W m−2 K−1 ± 15%) and correlation with fluid velocity is impossible in the studied range 0.018–0.32 m s−1.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 53, Issues 19–20, September 2010, Pages 3807–3816
نویسندگان
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