Abstract Micro-channel heat exchangers are widely applied in many industrial fields. Compared with conventional scale channels, micro-channels are of larger surface-to-volume ratio and higher heat transfer rate with more miniaturized scale and lower weight. In this study, micro-channel heat exchangers with cavities in two different shapes were designed and fabricated, and experiment research were conducted to analyze the influence of the shape, expansion and contraction cross-sectional lengths of cavities on flow and heat transfer characteristics. The results indicate that compared with straight channel, adding cavities in micro-channels could achieve heat transfer enhancement and pressure drop reduction simultaneously. The detailed effects of the shape as well as the expansion and contraction cross-sectional lengths of cavities on the heat transfer and the pressure drop are also revealed.

中文翻译：

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带腔微通道换热器流动和传热性能的实验研究

摘要 微通道换热器广泛应用于许多工业领域。与传统的尺度通道相比，微通道具有更大的表面积体积比和更高的传热率，并且尺度更小，重量更轻。本研究设计并制作了具有两种不同形状腔体的微通道换热器，并通过实验研究分析了腔体的形状、膨胀和收缩截面长度对流动​​和传热特性的影响。结果表明，与直通道相比，在微通道中增加空腔可以同时实现强化传热和降低压降。