کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
648439 1457195 2010 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Drag reducing surfactants for district heating
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
Drag reducing surfactants for district heating
چکیده انگلیسی
An application of specific surfactants in district heating and cooling systems can give notable economical benefits due to a reduction in friction and heat transfer attributed to a formation of an additional viscous sublayer along the pipe walls, buffering the turbulence. A mathematical three-layer model of water velocity profile is composed for the calculation of drag reduction and flow-capacity increase. At a properly chosen surfactant and concentration, the local drag can be reduced up to 80%. A computer simulation and optimization for a selected district heating network model with additive shows 4% saving in total costs because smaller pipes and weaker pumps are required.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Thermal Engineering - Volume 30, Issues 8–9, June 2010, Pages 833-838
نویسندگان
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