The flow and thermal field for Brazed Plate Fin Heat Exchanger (BPFHE) at the air side is presented in this study. Three-dimensional simulations of computational fluid dynamics were developed on a triangular section channel for the heat exchanger considered. The simulation of the fin is done for a given geometry and compared with experimental data presented by other authors, then a plane is raised keeping the original geometry and louver walls are included. The air-side performance of the heat exchanger and the hydraulic behavior is evaluated by calculating the Colburn (j) and frictional (f) factor. The result for the fin showed a deviation close to 3% when compared to experimental data for similar geometries from Keys & London. The results show how the turbulence highly increases the heat transfer phenomena.

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