Abstract

Shell and tube heat exchangers are used in factories for heat exchangers. Major issues of these heat exchangers are low heat, low frequency and high-pressure drop. Numerical study of the difference between gap and angle of barrier in volume firth and outlet move medium is determined for variation or movement of pipes to accept flow medium. Each baffle system is considered under the variation of flow medium controlled in the path and heat exchanger. It defines the variation of surface and heat exchanger with the flow of hot and cold fluid in surface and heat exchanger and the number of baffle structures. The number of turn units (NTU), overall heat exchanger coefficient (U) and efficiency (\(\varepsilon\)) are evaluated based on different Reynolds numbers (Rec) on the shell side (17693–30331). On the surface edge of the proposed method, the pressure drop is evaluated as the loss of strength from the system. In addition, the impact of inlet cooling fluid temperature, baffle spacing and baffle cutting ratio (BCR) is analyzed and discussed. As the results in all cases, the proposed configuration significantly increases the efficiency of heat exchangers compared to the other two configurations. The proposed method, reducing the pressure drop by 12.40%–11.22%, increases U, \(\varepsilon\) and NTU by 4.51%, 2.87%–4.51% and 5.78%–8.17% respectively.

中文翻译：

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通过优化螺旋折流板间距提高管壳式换热器的低压降传热效率

摘要

管壳式换热器在工厂中用于换热器。这些换热器的主要问题是低热量、低频率和高压降。数值研究了容积湾和出口移动介质中障碍物的间隙和角度之间的差异，以确定接受流动介质的管道的变化或移动。每个折流板系统都考虑了路径和热交换器中控制的流动介质的变化。它定义了表面和换热器随冷热流体在表面和换热器中的流动以及折流结构的数量的变化。根据壳侧不同的雷诺数 (Rec) (17693–30331) 评估匝数(NTU)、总体换热器系数 (U) 和效率 ( \(\varepsilon\) )。在所提出方法的表面边缘，压降被评估为系统的强度损失。此外，还分析讨论了入口冷却液温度、挡板间距和挡板切割比（BCR）的影响。从所有情况的结果来看，与其他两种配置相比，所提出的配置显着提高了热交换器的效率。所提出的方法将压降降低了12.40%~11.22%，U、  \(\varepsilon\) 和NTU分别增加了4.51%、2.87%~4.51%和5.78%~8.17%。