کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
660968 1458145 2008 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Dimensionless correlations of frost properties on a cold cylinder surface
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
Dimensionless correlations of frost properties on a cold cylinder surface
چکیده انگلیسی

We propose dimensionless correlations for frost properties on a cold cylinder surface. Frosting experiments were performed while changing various frosting parameters such as the air temperature, cold cylinder surface temperature, air velocity, and absolute humidity. The experimental data showed that a uniform frost layer grew around the circumference of the cylinder at a high air velocity. Dimensionless correlations for the thickness, density, and surface temperature of the frost layer, and for the heat transfer coefficient were obtained as functions of the Reynolds number, Fourier number, absolute humidity, and dimensionless temperature. The applicable ranges of these correlations are Reynolds number of 700–3000 (air velocities of 0.5–2.0 m/s), Fourier number of 56.8–295.7 (operating time of 0–100 min), absolute humidity of 0.00280–0.00568 kg/kga, air temperatures of 3–9 °C, and cold cylinder surface temperatures of −32 to −20 °C. The proposed correlations agreed with the experimental data within an error of 15%.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 51, Issues 15–16, 15 July 2008, Pages 3946–3952
نویسندگان
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