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树型微通道换热特性数值研究

Numerical Study on Heat Transfer Characteristics of Tree-Shaped Microchannel
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摘要 建立了三维树型微通道换热器模型,模拟并分析了其热流耦合场。对比了单、双层微通道换热器的最高温度及双层树型微通道在顺流、逆流、交叉流三种情况下的冷却效果。底部热流密度qw=50W·cm-2时,单层微通道底面最高温度为102.5℃,双层微通道底面最高温度均低于63.38℃,且底面低于60℃部分所占比例均高于60%。双层微通道冷却效果明显优于单层微通道,且在逆流方式下,双层微通道底面温度分布均匀,中心部分具有较低温度,有效改善了一般换热器散热不均而造成的中心部分温度过高的问题。 This work built a three-dimensional tree-shaped micro channel heat exchanger （MCHE） model, simulated and analyzed the heat-flow coupling field. The maximum temperature of single-layer MCHE was compared with double-layer MCHE, and the cooling efficiency of tree-shaped MCHE under parallel flow, counters flow and cross flow were analyzed. When bottom heat fluxes q. = 50 W · cm^ -2 , the maximum temperature of single-layer MCHE and double-layer MCHE is 102.5℃ and 63.38℃, respectively. The ratio of bottom temperature under 60℃ is more than 60%. The cooling effect of double-layer MCHE is obviously better than single-layer MCHE, and the temperature distribution of heated surface is uniform, the temperature of the centre part is lower, which effectively solved the high temperature in the centre part due to the no uniform heat dissipation.
作者 钟崇嵩
机构地区 上海雪森林制冷设备有限公司
出处 《低温与特气》 CAS 2015年第3期12-15,共4页 Low Temperature and Specialty Gases
关键词 双层微通道 热流耦合 数值模拟 冷却 double-layer micro channel heat-flow coupling field cooling
分类号 TK124 [动力工程及工程热物理—工程热物理]
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参考文献15

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低温与特气
2015年 第3期

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