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本文对水平管多孔表面的凝结换热进行了理论分析和实验研究。理论分析中,对现有的低翅管凝结换热的理论进行了补充和完善。对翅侧的换热,既考虑到表面张力的影响,又考虑到重力的作用。对光管、管表面覆盖网、表面开微型螺旋槽(三角形和矩形)及管底部嵌不同多孔排液板的水平管,进行了实验研究。实验结果表明:管外覆网可以影响凝结换热,开螺旋槽及管底嵌多孔排液*饭后,可以显著提高换热效果。
In this paper, the theoretical analysis and experimental research on the condensation heat transfer in the horizontal tube porous surface are carried out. In the theoretical analysis, the existing theories of condensation heat transfer of low-finned tubes were supplemented and improved. On the wing side of the heat transfer, taking into account the effects of surface tension, but also take into account the role of gravity. The experimental research was carried out on the light pipe, the pipe covering the net, the surface of the micro-spiral groove (triangle and rectangle) and the bottom of the pipe with different perforated perforated plates. The experimental results show that the pipe covering the net can affect the condensation heat transfer, open the spiral groove and the bottom of the pipe embedded porous drainage * meal, can significantly improve the heat transfer effect.