کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
659030 1458099 2012 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of vapour velocity on condensate retention between fins during condensation on low-finned tubes
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
Effect of vapour velocity on condensate retention between fins during condensation on low-finned tubes
چکیده انگلیسی

The paper reports experimental results using simulated condensation on horizontal finned tubes in a vertical wind tunnel. Condensation was simulated using three liquids (water, ethylene glycol and R113) supplied to the tube via small holes between the fins along the top generator of the tubes. Eight tubes with different fin dimensions were used. The results indicate that when the retention angle (measured from the top of the tube to the position where the interfin space is completely filled with liquid) is less than about π/2 at zero air velocity, it increases with increasing air velocity. On the other hand, for cases where the retention angle is greater than about π/2 at zero air velocity it decreases with increasing air velocity. In all cases (all fluids and all tubes tested) the retention angle approaches a value near π/2 with increasing air velocity. Satisfactory agreement was found with observations taken during condensation.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 55, Issue 4, 31 January 2012, Pages 1412–1418
نویسندگان
, , , ,