کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7054319 | 1458018 | 2018 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Exergy destruction minimization: A principle to convective heat transfer enhancement
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Enhancing convective heat transfer, by strengthening fluid disturbance, is an effective way of raising the utilization efficiency of an energy system. In this study, in order to introduce a principle for convective heat transfer enhancement, a physical quantity called available potential was defined, and an equation of available potential was derived to obtain an expression of local exergy destruction caused by heat transfer and fluid flow. Then, a mathematical model of convective heat transfer optimization was established by adopting adequate objective function and constraint condition based on exergy destruction minimization, and an optimal flow field of longitudinal whirling flow with multi-vortexes was obtained by solving the optimization controlling equations. Finally, through numerical simulation and a PIV experiment, a heat transfer unit consisting of center-connected awl-shaped slices was studied to realize longitudinal whirling flow with multi-vortexes in a tube, which indicated an excellent effect of heat transfer enhancement.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 122, July 2018, Pages 11-21
Journal: International Journal of Heat and Mass Transfer - Volume 122, July 2018, Pages 11-21
نویسندگان
W. Liu, P. Liu, J.B. Wang, N.B. Zheng, Z.C. Liu,