کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7054359 1458018 2018 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Thermal and hydrodynamic characteristics of divergent rectangular minichannel heat sinks
ترجمه فارسی عنوان
ویژگی های حرارتی و هیدرودینامیکی غرق گرمای مینیکانل مستطیلی واگن
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
چکیده انگلیسی
For many years, miniaturizing the heat exchangers has led to the introduction of minichannel heat sinks (MCHSs) which offer a significant improvement in the heat transfer rate for cooling/heating applications. In this research, we aim to further improve the geometry of MCHSs by diverging the minichannels. Therefore, here a comparative study on hydrothermal performance of a parallel and divergent MCHSs with divergence angles of β = 1.38° and β = 2.06° is conducted. The volumetric flow rate of the working fluid is ranged from 100 to 600 cm3/min under different heat flux intensities of 3.2 × 104, 4 × 104, and 4.8 × 104 W/m2. To elucidate the thermal performance of divergent minichannels, the wall temperature distribution, average Nusselt number, pressure drop and the corresponding values of friction factor, thermal resistance of the coolant, and the cost of performance (COP) are evaluated at different experimental conditions. The results reveal that the divergent MCHSs have a clear advantage over the traditional parallel MCHSs for practical thermal applications; and they offer greater values of Nusselt number and COP along with lower pressure drop penalty, especially at higher flow rate of the working fluid.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 122, July 2018, Pages 264-274
نویسندگان
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