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化工进展  2015 

不同结构型式纵翅片管综合换热性能的数值模拟

DOI: 10.16085/j.issn.1000-6613.2015.04.006

Keywords: 纵翅片,结构型式,强化换热,综合性能

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Abstract:

在能源日益匮乏的今天,对低温热能的回收也逐渐成为热点.纵翅片换热器作为中低温烟气余热回收设备的核心部件,其中的平板式纵翅片管能有效解决翅片积灰、结垢问题,但却存在换热能力不理想而使得使用受到限制.本工作对传统平板纵翅片管进行结构改进,强化管外翅片与管外流体的换热效果,并分别采用j/f、j/f1/2和j/f1/3作为综合性能评价指标,分析研究4种不同结构型式纵翅片管的综合换热性能.结果表明百叶窗式纵翅片管的换热性能要比普通平板式纵翅片管高90%以上,然而压降也是最大.通过评价指标可以看到在相同压降和相同泵功条件下,百叶窗式翅片管的综合性能要优于其他.通过实验研究,得到的测试结果与模拟结果相符,相对误差的平均值约为15%.研究成果为纵翅片结构优化提供了理论基础.

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