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| 叉流板式间接蒸发冷却换热器的实验研究 |
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赵振生,任承钦,涂敏,曾阳,王华辉
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| (赵振生,任承钦,曾阳(湖南大学机械与运载工程学院,长沙,410082);涂敏(湖南大学土木工程学院,长沙,410082);王华辉(机械工业部第四设计研究院,洛阳,471000)?) |
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| 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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| Experiment Investigation on Plate Type Heat Exchanger Used as Indirect Evaporative Cooler |
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Zhao Zhensheng Ren Chengqin Tu Min Zeng Yang Wang Huahui
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| (Zhao Zhensheng1 Ren Chengqin1 Tu Min2 Zeng Yang1 Wang Huahui3(1.Institute of machinery , transport engineering,Hunan University,Changsha,Hunan 410082,2.Institute of civil engineering,3.The Fourth Institute of Project Planning , Research of Machinery Industry,Luoyang,Henan 471000)) |
| 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 |
