کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
660085 | 1458107 | 2011 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Frosting and defrosting characteristics of a fin according to surface contact angle
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
We investigated the characteristics of frosting and defrosting on a fin according to its surface contact angle under the winter operating conditions of a heat pump. The static contact angles were 2.5°, 75°, and 142° for hydrophilic, bare, and hydrophobic surfaces, respectively. The frost layer exhibited different frost formations for different surface contact angles during the early stages of frost formation. Frost retardation was observed on the hydrophobic fin, but the effect was not significant. The frost layer was thinner and the average frost density was higher on the hydrophilic surface than on the other surface-treated fins. The effect of surface treatment on defrosting time was found to be insignificant. However, the ratio of residual water on the hydrophilic surface was significantly smaller than those on the other surfaces. Because of this, in repeated frosting/defrosting experiments, the fin of the hydrophilic surface was found to show almost the same frosting/defrosting behaviors as those of the first run.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 54, Issues 13â14, June 2011, Pages 2758-2764
Journal: International Journal of Heat and Mass Transfer - Volume 54, Issues 13â14, June 2011, Pages 2758-2764
نویسندگان
Kyoungmin Kim, Kwan-Soo Lee,