کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
644679 1457129 2016 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Multi-objective optimization of a double-layered microchannel heat sink with temperature-dependent fluid properties
ترجمه فارسی عنوان
بهینه سازی چند هدفه از دو لایه گنبد گرمایی میکرو کانال با خواص مایع وابسته به دما
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
چکیده انگلیسی


• Multi-objective optimization of a double-layered MCHS of rectangular wedge shape was performed.
• The narrower microchannel design yielded the lower thermal resistance at the higher pumping power.
• A 14.9% change in thermal resistance was accompanied by a 64.1% change in pumping power.
• The pumping power was lowered significantly with the increase in the heat flux.
• The lowest thermal resistances leaded to the lowest maximum temperatures at the substrate bottom.

Multi-objective optimization of a microchannel heat sink with a rectangular wedge-shaped cross section was performed in this work. The optimization was performed by a multi-objective genetic algorithm using three-dimensional conjugate heat transfer analysis with variable thermo-physical properties of the coolant (water). Response surface approximation was used to approximate the objective function to reduce computing time. Two geometric variables related to the channel cross section and a ratio of flow rates in the upper and lower channels were selected as design variables for the optimization. Thermal resistance and pumping power were considered as the objective functions. The design space was explored through a parametric study, and Latin hypercube sampling was used for the selection of the design points. The optimizations were performed for three different heat fluxes: 1 × 106, 2 × 106, and 3 × 106 W/m2. Pareto-optimal fronts representing the trade-offs between the performance parameters were obtained for the selected heat fluxes, which yielded important results for the design of microchannel heat sinks.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Thermal Engineering - Volume 99, 25 April 2016, Pages 262–272
نویسندگان
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