Micro-channel heat exchanger optimization
Micro-channel heat exchanger optimization
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DOI：
10.1109/stherm.1991.152913
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发表时间：
1991-02
期刊：
影响因子：
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通讯作者：
G. Harpole;J. Eninger
中科院分区：
文献类型：
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作者：
G. Harpole;J. Eninger
建立了完整的微通道制冷机二维流动/传热模型。该模型的设计参数的优化的情况下，1千瓦/厘米/sup 2/热通量的顶面在25摄氏度。在这种情况下，纯水可以用作冷却剂，或者如果要将热量倾倒到冰/水中，则可以使用92%的水/8%的甲醇（-5摄氏度凝固点）。流速应为约50 cc/s/cm/sup 2/表面积。分配歧管通道间距（中心到中心）应为333 μ m（30通道/cm）。翅片高度应约为167 μ m（H/sub F//L=1）。分配歧管通道宽度应约为200 μ m（W/L=0.6）。微通道的宽度应在7 μ m和14 μ m之间，而翅片厚度与微通道宽度的比率应在0.5到1.0之间。利用这些设计参数，将实现大约100 W/cm/sup 2/ K的有效传热系数（表面热通量除以表面与冷却剂入口温度差），总压降仅为大约2巴。
A complete two-dimensional flow/thermal model of the micro-channel cooler is developed. Optimization of the design parameters with this model is demonstrated for the case of a 1 kW/cm/sup 2/ heat flux with the top surface at 25 degrees C. For this case, pure water could be used as the coolant, or 92% water/8% methanol (-5 degrees C freezing point) if the heat is to be dumped to ice/water. The flow rate should be about 50 cc/s per cm/sup 2/ of surface area. The distribution manifold channel spacing (center-to-center) should be 333 mu m (30 channels/cm). The fin height should be about 167 mu m (H/sub F//L=1). The distribution manifold channel widths should be about 200 mu m (W/L=0.6). The micro-channels should be between 7 mu m and 14 mu m wide, while the ratio of fin thickness to micro-channel width should be from 0.5 to 1.0. With these design parameters, an effective heat transfer coefficient (surface heat flux divided by surface to coolant inlet temperature difference) on the order of 100 W/cm/sup 2/ K will be achieved with a total pressure drop of only about 2 bar.>