Numerical study of flow maldistribution in plate heat exchangers used for evaporation process

IF 0.8 Q4 THERMODYNAMICS
Paweł Płuszka, Arkadiusz Brenk, Z. Malecha
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引用次数: 1

Abstract

Geometry of plate heat exchangers (PHE) is characterized by a complex net of narrow channels. It enhances turbulence and results in better heat transfer performance. Theoretically, larger number of channels (plates) should proportionally increase the PHE heat power capacity. In practice a nonuniform massflow distribution in consecutive flow channels can significantly deteriorate the overall heat exchange performance. The flow maldistribution is one of the most commonly reported exploitation problems and is present in PHE with and without phase-change flows. The presented paper investigates numerically a flow pattern in PHE with evaporation of R410A refrigerant. Various sizes of PHE are considered. The paper introduces a robust methodology to transform the complicated geometry of a real 3D PHE to its 2D representation. It results in orders of magnitude faster calculations and allows for fast evaluation of different geometrical changes of PHE and their effect on flow maldistribution.
蒸发用板式换热器内流动不均匀的数值研究
板式换热器的几何结构以狭窄通道的复杂网络为特征。它增强了湍流并导致更好的传热性能。理论上,更多数量的通道(板)应按比例增加PHE的热功率容量。在实践中,连续流道中的不均匀质量流分布会显著恶化整体热交换性能。流量分布不均是最常见的开发问题之一,在有相变流和无相变流的PHE中都存在。本文对R410A制冷剂蒸发时PHE中的流动模式进行了数值研究。考虑了各种尺寸的PHE。本文介绍了一种将真实三维PHE的复杂几何形状转换为二维表示的稳健方法。它使计算速度加快了几个数量级,并允许快速评估PHE的不同几何变化及其对流量分布不均的影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Archives of Thermodynamics
Archives of Thermodynamics THERMODYNAMICS-
CiteScore
1.80
自引率
22.20%
发文量
0
期刊介绍: The aim of the Archives of Thermodynamics is to disseminate knowledge between scientists and engineers interested in thermodynamics and heat transfer and to provide a forum for original research conducted in Central and Eastern Europe, as well as all over the world. The journal encompass all aspect of the field, ranging from classical thermodynamics, through conduction heat transfer to thermodynamic aspects of multiphase flow. Both theoretical and applied contributions are welcome. Only original papers written in English are consider for publication.
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