| 管壳式换热器壳侧流动与传热的实验研究 |
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| 引用本文： | 李红枫,周明连. 管壳式换热器壳侧流动与传热的实验研究[J]. 发电设备, 2001, 0(1): 18-21,40 |
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| 作者姓名： | 李红枫 周明连 |
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| 作者单位： | 1. 中国矿业大学北京校区
2. 北方交通大学机电学院 |
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| 摘 要： | 对不同壳程结构的管壳式热交换器壳侧流动的流型、流阻及其传热特性进行了系统的实验研究。实验表明 ,直挡流板的壳侧流道由于存在滞留区 ,流阻高且不利于换热 ,螺旋板的壳侧流道的Nu比直挡流板高 4 9.4 % ,而具有螺旋板和多孔介质组合的壳侧流道的对流换热系数比直挡流板高 79.5%。同时得到了最佳螺旋角为 4 0°,多孔介质的最佳孔隙率为 0 .985。图 9参 6
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| 关 键 词： | 电站 管壳式热交换器 流动 强化传热 |
An Experimental Study on the Shell Side Flow and Heat Transfer of Shell and Tube Type Heat Exchangers |
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| LI Hong feng ,ZHOU Ming lian. An Experimental Study on the Shell Side Flow and Heat Transfer of Shell and Tube Type Heat Exchangers[J]. Power Equipment, 2001, 0(1): 18-21,40 |
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| Authors: | LI Hong feng ZHOU Ming lian |
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| Affiliation: | LI Hong feng 1,ZHOU Ming lian 2 |
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| Abstract: | Shell side flow pattern, flow resistence and heat transfer of shell and tube type exchangers with different shell side structures were systematically studied by experiments. These show that the shell side flow in case of straight segmental baffles exhibits a resistance because of the presence of stagnation zones, being also unfavourable for heat transmission. The Nussel number ( Nu ) of the shell side flow in case of helical baffles is higher than that of straight baffles. Moreover, the combination of helical baffles and a porous media results on a shell side convective heat transfer coefficients which are by 79.5% higher as compared with the use of straight baffles. Besides the optimal helical angle is found to be 40 and the optimal porosity of the media to be 0.985. Figs 9 and refs 6 |
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| Keywords: | power plant shell and tube type heat exchanger flow heat transfer augmentation |
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