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다공성 매질 방법을 이용한 PCHE의 유동분배 및 열전달 성능 분석
정성석(Seong Seok Chung),조항진(HangJin Jo) 대한기계학회 2023 대한기계학회 춘추학술대회 Vol.2023 No.11
In this study, the flow distribution and heat transfer performance of the Printed Circuit Heat Exchanger (PCHE) were evaluated under different header conditions, including various outlet header shapes, using the porous media method in ANSYS CFX. The PCHE model consists of 7 plates, each etched with 8 straight-type channels. To enhance predictability concerning pressure drop and heat transfer correlations, the simulation was conducted with various outlet header shapes, as the outlet headers contribute significantly to pressure drop. Flow distribution was quantified using CoV (Coefficient of Variance) values, which indicate deviations in mass flow rates in the PCHE. As the pressure drop ratio between the PCHE core and the header increased, flow distribution improved, and the heat transfer coefficient converged to the global heat transfer coefficient when assuming uniform flow distribution.