| 摘要: |
| 利用自制实验台,在前期实验工作的基础上,对叉流板式间接蒸发冷却器进行了实验研究.发现换热器两侧空气的流量比、流量大小对换热器的效率有着重要影响.影响趋势在干工况与湿工况下又有所不同,这是因为换热器中两流体的热容量之比发生了很大变化.实验结果表明:干工况下,换热器的摩擦阻力系数大于按层流理论公式计算所得的值,层流向湍流过渡的雷诺数为1200左右;喷水情况下二次空气侧的阻力系数远大于干工况下的阻力系数,约为干工况下的2.5到3倍之间.分析结果可以对换热器的优化设计提供一定的参考和帮助. |
| 关键词: 热工学 间接蒸发冷却 板式换热器 阻力特性 换热效率 |
| DOI：10.3969/j.issn.0253-4339.年份（4位数字）.月份（2位数字）.文章的起始页码（3位数字） |
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| 基金项目: |
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| Experiment Investigation on Plate Type Heat Exchanger Used as Indirect Evaporative Cooler |
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| Abstract: |
| An experimental investigation was conducted on the performance of a crossflow plate type heat exchanger used as an indirect evaporative cooler.It is found that both the air mass flow rate and the ratio of the mass flow rate have a significant effect on the heat exchanger performance.The clear difference in performance is found for dry and wet conditions due to the great change in the ratio of the heat capacity rate of the two fluids.The experimental results show that the actual friction factor was greater t... |
| Key words: Pyrology Plate type heat exchanger Indirect evaporative cooling Heat transmission effectiveness Characteristics of flow resistance |
