Numerical investigation on combined multiple shell-pass shell-and-tube heat exchanger with continuous helical baffles
Numerical investigation on combined multiple shell-pass shell-and-tube heat exchanger with continuous helical baffles
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DOI：
10.1016/j.ijheatmasstransfer.2008.09.009
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发表时间：
2009-02
影响因子：
5.2
通讯作者：
Qiuwan Wang;Qiuyang Chen;Guidong Chen;M. Zeng
中科院分区：
文献类型：
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作者：
Qiuwan Wang;Qiuyang Chen;Guidong Chen;M. Zeng
为了提高管壳式换热器的传热性能和简化制造工艺，提出了一种在管壳程外壁设置连续螺旋折流板的组合式多程管壳式换热器（CMSP-STHX）。采用计算流体力学（CFD）方法对CMSP-STHX与传统弓形折流板管壳式换热器（SG-STHX）进行了比较。计算结果表明，在相同的质量流量M和总传热量Qm下，CMSP-STHX的平均总压降Δ pm比常规SG-STHX平均低13%。在相同的壳程总压降Δpmin下，CMSP-STHX的总传热量Qm比SG-STHX高5.6%，质量流量比SG-STHX高6.6%。CMSP-STHX可替代SG-STHX用于工业应用，以节约能源，降低成本，延长使用寿命。
A combined multiple shell-pass shell-and-tube heat exchanger (CMSP-STHX) with continuous helical baffles in outer shell pass has been invented to improve the heat transfer performance and simplify the manufacture process. The CMSP-STHX is compared with the conventional shell-and-tube heat exchanger with segmental baffles (SG-STHX) by means of computational fluid dynamics (CFD) method. The numerical results show that, under the same mass flow rate M and overall heat transfer rate Qm, the average overall pressure drop Δpmof the CMSP-STHX is lower than that of conventional SG-STHX by 13% on average. Under the same overall pressure drop Δpmin the shell side, the overall heat transfer rate Qmof the CMSP-STHX is nearly 5.6% higher than that of SG-STHX and the mass flow rate in the CMSP-STHX is about 6.6% higher than that in the SG-STHX. The CMSP-STHX might be used to replace the SG-STHX in industrial applications to save energy, reduce cost and prolong the service life.