Flow boiling in constructal tree-shaped minichannel network
Flow boiling in constructal tree-shaped minichannel network
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DOI：
10.1016/j.ijheatmasstransfer.2010.09.051
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发表时间：
2011-01
影响因子：
5.2
通讯作者：
Chengbin Zhang;Yongping Chen;R. Wu;M. Shi
中科院分区：
文献类型：
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作者：
Chengbin Zhang;Yongping Chen;R. Wu;M. Shi
采用一维模型对进口直径为4mm的树形微型通道网络中的流动沸腾进行了数值研究，并考虑了节点处的微小损失。对构建的树形小通道网络的泵送功率要求、压降、温度均匀性和性能系数进行了评价，并与传统的蛇形通道进行了比较，流体流经历了从饱和液体到饱和蒸汽的相变。分析和讨论了长度尺寸和顶视图面积（即路径长度）对树形小通道网络饱和气液两相流沸腾换热的影响。结果表明，长度为2维的树形网络能最大限度地增加流量；在树形小通道网络中，路径长度对流动沸腾的决定起着重要的作用。特别是，与传统的蛇形通道相比，构建的树形小通道网络中的流动沸腾具有压降小、泵送功率要求低、温度均匀性好、性能系数（COP）高的特点。
Flow boiling in constructal tree-shaped minichannel network with an inlet diameter of 4mm is numerically investigated using a one-dimensional model, taking into consideration the minor losses at junctions. The pumping power requirement, pressure drop, temperature uniformity and coefficient of performance of the constructal tree-shaped minichannel network are all evaluated and compared with those of the corresponding traditional serpentine channel, and the fluid stream undergoes a phase change from saturated liquid to saturated vapor. The effects of the length dimension and top view area (i.e. the path length) on saturated gas–liquid two-phase flow boiling heat transfer in tree-shaped minichannel networks are all analyzed and discussed. The results indicated that, the tree-shaped network configured with length dimension of two is able to maximum flow access; the path length plays a significant role in the determination of flow boiling in tree-shaped minichannel networks. In particular, compared to the traditional serpentine channel, flow boiling in constructal tree-shaped minichannnel network possesses less pressure drop, lower pumping power requirement, better temperature uniformity and higher coefficient of performance (COP).