Abstract Round rod baffle (RRB), plain plate baffle (PPB), wavy-shaped plate baffle (WSB) and polygonal-shaped plate baffle (PSB) are four commonly used baffles in parallel flow shell and tube heat exchangers (STHXs). Comparative study of these four different baffles are numerically carried out using different performance indicators including Nusselt number, friction factor, performance evaluation criterion, entropy generation ratio, and entransy dissipation ratio for flow in full turbulent regime. Heat transfer mechanism has also been discussed. Correlations for Nusselt number and friction factor are fitted and the cost estimation using Hall’s method is compared. It is found that the Nusselt number of STHX-PPB, STHX-WSB, and STHX-PSB increased by 20.9%, 15.2%, and 23.9% averagely compared with STHX-RRB, respectively. The friction factor can be increased on average by 142.0%, 154.5%, and 242.4%, respectively. However, the overall performance of them is only 90.1%, 84.4%, and 82.3% that of STHX-RRB, respectively. The sequence of entropy generation and entransy dissipation is STHX-RRB > STHX-WSB > STHX-PPB > STHX-PSB. The inlet Re and baffle distance have significant effects on different performance indicators while the baffle width does not. Finally, the results show that the STHX-PSB can reduce the total cost as it has better ability on heat enhancement.

中文翻译：

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四种不同性能指标的平行流管壳式换热器的热性能对比研究

摘要 圆杆挡板（RRB）、平板挡板（PPB）、波浪形板挡板（WSB）和多边形板挡板（PSB）是平行流管壳式换热器（STHX）中常用的四种挡板。使用不同的性能指标，包括努塞尔数、摩擦系数、性能评价标准、熵生成比和全湍流状态下流动的火积耗散比，对这四种不同的挡板进行了数值比较研究。还讨论了传热机制。拟合了 Nusselt 数和摩擦系数的相关性，并比较了使用霍尔方法的成本估算。发现STHX-PPB、STHX-WSB和STHX-PSB的努塞尔数分别比STHX-RRB平均提高了20.9%、15.2%和23.9%。摩擦系数平均可分别提高142.0%、154.5%和242.4%。然而，它们的整体性能分别只有 STHX-RRB 的 90.1%、84.4% 和 82.3%。熵产生和熵耗的顺序是 STHX-RRB > STHX-WSB > STHX-PPB > STHX-PSB。入口Re和挡板距离对不同的性能指标有显着影响，而挡板宽度则没有。最后，结果表明，STHX-PSB 可以降低总成本，因为它具有更好的热增强能力。入口Re和挡板距离对不同的性能指标有显着影响，而挡板宽度则没有。最后，结果表明，STHX-PSB 可以降低总成本，因为它具有更好的热增强能力。入口Re和挡板距离对不同的性能指标有显着影响，而挡板宽度则没有。最后，结果表明，STHX-PSB 可以降低总成本，因为它具有更好的热增强能力。