Parametric CFD Analysis to study the Influence of Fin Geometry on the Performance of a Fin and Tube Heat Exchanger

Shobhana Singh, K. Sørensen, T. Condra
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引用次数: 5

Abstract

— Heat transfer and pressure loss characteristics of a fin and tube heat exchanger are numerically investigated based on parametric fin geometry. The cross-flow type heat exchanger with circular tubes and rectangular fin profile is selected as a reference design. The fin geometry is varied using a design aspect ratio as a variable parameter in a range of 0.1-1.0 to predict the impact on overall performance of the heat exchanger. In this paper, geometric profiles with a constant thickness of fin base are studied. Three-dimensional, steady state CFD model is developed using commercially available Multiphysics software COMSOL v5.2. The numerical results are obtained for Reynolds number in a range from 5000 to 13000 and verified with the experimentally developed correlations. Dimensionless performance parameters such as Nusselt number, Euler number, efficiency index, and area-goodness factor are determined. The best performed geometric fin profile based on the higher heat transfer and lower pressure loss is predicted. The study provides insights into the impact of fin geometry on the heat transfer performance which help escalate the understanding of heat exchanger designing and manufacturing at a minimum cost.
翅片几何形状对翅片管式换热器性能影响的参数CFD分析
基于参数化翅片几何,对翅片管式换热器的传热和压力损失特性进行了数值研究。选择矩形翅片型圆管交叉流换热器作为参考设计。采用设计长宽比作为一个在0.1-1.0范围内的可变参数来改变翅片的几何形状,以预测对换热器整体性能的影响。本文研究了等厚度翼基的几何轮廓。三维稳态CFD模型是使用市售的多物理场软件COMSOL v5.2开发的。得到了5000 ~ 13000雷诺数范围内的数值计算结果,并与实验建立的相关关系进行了验证。确定无量纲性能参数,如努塞尔数、欧拉数、效率指标和面积优度因子。预测了基于高传热和低压力损失的最佳几何翅型。该研究提供了翅片几何形状对传热性能的影响的见解,有助于以最低成本提高对热交换器设计和制造的理解。
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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