Experimental Study of Shell-Side Heat Transfer Coefficient and Pressure Drop for an Integrally Helical Baffled Heat Exchanger Combined with Different Enhanced Tubes

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• 作者：Zhengguo Zhang ; Changshun Wu ; Xiaoming Fang ; Xuenong Gao ; Zhenyong Wang
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2009
• 出版时间：April 15, 2009
• 年：2009
• 卷：48
• 期：8
• 页码：4040-4044
• 全文大小：149K
• 年卷期：v.48,no.8(April 15, 2009)
• ISSN：1520-5045

文摘

Experiments were performed to compare the shell-side heat transfer coefficient and pressure drop of an integrally helical baffle heat exchanger with rib-shaped fin tubes to those of that with low-fin tubes for oil cooling using water as a coolant. The experimental results showed that for the heat exchanger with rib-shaped fin tubes, the shell-side Nusselt and Euler numbers were augmented by 90−130% and 10%, respectively. The increase in heat transfer is significantly greater than that in pressure drop for rib-shaped fin tubes. Correlations have been suggested for both the shell-side Nusselt and Euler numbers for the two heat exchangers with different tube types and give very good agreement with experimental results. It is a promising route to use rib-shaped fin tubes instead of low-fin tubes for improving the performance of an integrally helical baffle heat exchanger.