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Thermal enhancement of fin and tube heat exchanger with guiding channels and topology optimisation

机译：翅片管式换热器的导流通道优化和拓扑优化

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As the air-side heat transfer is controlling the efficiency of fin and tube heat exchangers (FTHX), the thermal enhancement of FTHX relies more on the air-side. A theoretical model of the baseline FTHX is built using ANSYS Fluent which is then validated by wind tunnel experiments. After analysing the simulation results of the baseline FTHX, two novel air-side fin configurations are proposed. The first design can guide more airflow to the back of the tubes to mitigate wake zones. For the second design, topology optimisation is used to significantly increase the heat transfer area at the air-side with minimised pressure drop penalty. To further improve the two designs, parametric studies are conducted through which optimal design parameters are obtained. Comparing with the baseline FTHX, the optimal guiding channel fin design and topology optimisation fin design can dissipate 8.5% and 7.0% more heat respectively, or consume 41.4% and 33.3% less fan power respectively. As such, the proposed enhanced air-side fin designs are promising candidates for improving the efficiency of FTHXs. (C) 2018 Published by Elsevier Ltd.
机译：由于空气侧的传热控制着翅片管式换热器（FTHX）的效率，因此FTHX的热增强更多地依赖于空气侧。使用ANSYS Fluent建立了基线FTHX的理论模型，然后通过风洞实验对其进行了验证。在分析了基线FTHX的仿真结果之后，提出了两种新颖的空气侧翅片配置。第一种设计可以将更多的气流引导到管子的背面，以减轻尾流区域。对于第二种设计，拓扑优化用于以最小的压降损失显着增加空气侧的传热面积。为了进一步改进这两种设计，进行了参数研究，从而获得了最佳设计参数。与基线FTHX相比，最佳引导通道散热片设计和拓扑优化散热片设计分别可以多散发8.5％和7.0％的热量，或分别减少41.4％和33.3％的风扇功率。因此，建议的增强型空气侧翅片设计是提高FTHX效率的有希望的候选者。 （C）2018由Elsevier Ltd.发布

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