A review of heat transfer enhancement techniques in plate heat exchangers
A review of heat transfer enhancement techniques in plate heat exchangers
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DOI：
10.1016/j.rser.2018.11.017
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发表时间：
2019-03
影响因子：
15.9
通讯作者：
Ji Zhang;Xiaowei Zhu;M. Mondejar;F. Haglind
中科院分区：
文献类型：
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作者：
Ji Zhang;Xiaowei Zhu;M. Mondejar;F. Haglind
板式换热器自20世纪20年代首次商业开发以来，已广泛应用于许多工业应用中。提高板式换热器的热工水力性能对于能量转换以及通过节省资本投资来提高系统经济性至关重要。板式换热器的效率可以通过优化其几何形状或使用传热强化技术来提高。本文提供了一个全面的审查以前的工作，关于人字形的几何参数对板式换热器的性能的影响，以及传热强化技术在板式换热器中的应用，重点是被动表面技术和使用纳米流体。本文的目的不仅是描述相关的研究，但也提供了一个理解的传热机制的结果，并评估和比较不同的传热强化技术。此外，展望了未来的研究方向。研究表明，对于人字形板式换热器，人字形夹角是影响单相换热流动结构的最重要的几何参数;同时，人字形夹角对两相换热中以对流为特征的换热区域也有重要影响。基于性能评价标准的分析表明，具有不同几何参数和增强技术的研究的热工水力性能通常在低的热膨胀系数下更高。此外，审查和分析表明，胶囊型压花表面和微结构表面的纳米和微孔层是增强技术，目前在单相和两相传热性能最高，分别。
Plate heat exchangers have been widely applied in numerous industrial applications since their first commercial exploitation in the 1920s. Enhancing the thermal-hydraulic performance of plate heat exchangers is of crucial importance for the energy conversion as well as for the improvement of the system economy, through savings in the capital investment. The efficiency of a plate heat exchanger can be improved either by optimizing its geometry or using heat transfer enhancement techniques. This paper provides a comprehensive review of previous works regarding the effects of chevron corrugation geometrical parameters on the performance of plate heat exchangers, and the application of heat transfer enhancement techniques in plate heat exchangers, focusing on passive surface techniques and the use of nanofluids. The objective of the paper is not only to describe relevant studies, but also to provide an understanding of the heat transfer mechanisms governing the results, and to evaluate and compare the different heat transfer enhancement techniques. In addition, prospective directions for future research are provided. The review indicates that for the chevron-type plate heat exchanger, the chevron angle is the most influential geometrical parameter by changing the flow structures in the single-phase heat transfer; meanwhile the chevron angle has a significant influence on the heat transfer regions characterized by convection in the two-phase heat transfer. An analysis based on the performance evaluation criteria suggests that the thermal-hydraulic performances of the studies with different geometrical parameters and enhancement techniques are generally higher at low Reynold numbers. Furthermore, the review and analysis indicate that the capsule-type embossing surface and the microstructured surface with a nano- and microporous layer are the enhancement techniques that present the highest performance in single-phase and two-phase heat transfer, respectively.