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Influence of inlet configuration and distributor geometry on the performance of cryogenic plate-fin heat exchangers
Applied Thermal Engineering ( IF 6.4 ) Pub Date : 2021-06-17 , DOI: 10.1016/j.applthermaleng.2021.117197
Patrick Haider , Pascal Freko , Thomas Acher , Sebastian Rehfeldt , Harald Klein

The influence of inlet placement and distributor geometry on the steady-state efficiency and pressure drop of cryogenic plate-fin heat exchangers (PFHEs) is studied using a three-dimensional simulation model. The simulation model employs a porous media approach to combine computational fluid dynamics with well-established correlations for heat transfer and pressure drop in fin materials. An isothermal study is conducted for comparison of six different distributor geometries. The selection of a favorable design depends on a trade-off between heat transfer and allowable pressure drop of a specific task but the presented results can serve as a guideline. Furthermore, two different configurations of a 6-stream PFHE are compared to an idealized, pseudo one-dimensional design. Both feasible designs lead to a significant increase in pressure drop and the thermal efficiency of the feasible designs differs by 5 percentage points. This highlights the necessity of considering the inlet- and distributor configuration in the design of a cryogenic PFHE.



中文翻译:

进口配置和分配器几何形状对低温板翅式换热器性能的影响

入口位置和分配器几何形状对低温板翅式换热器 (PFHE) 的稳态效率和压降的影响使用三维仿真模型进行研究。模拟模型采用多孔介质方法,将计算流体动力学与翅片材料中的传热和压降的相关性相结合。进行等温研究以比较六种不同的分配器几何形状。有利设计的选择取决于特定任务的传热和允许压降之间的权衡,但所呈现的结果可以作为指导。此外,将 6 流 PFHE 的两种不同配置与理想化的伪一维设计进行了比较。两种可行设计都导致压降显着增加,并且可行设计的热效率相差 5 个百分点。这突出了在设计低温 PFHE 时考虑入口和分配器配置的必要性。

更新日期:2021-06-22
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