压力降
之字形的
传热
机械
材料科学
鳍
翼型
强化传热
热交换器
流利
计算流体力学
工程类
传热系数
机械工程
复合材料
几何学
物理
数学
作者
Dong Eok Kim,Moo Hwan Kim,Jae Eun,Seong O Kim
标识
DOI:10.1016/j.nucengdes.2008.08.002
摘要
Three-dimensional numerical analysis was performed to investigate heat transfer and pressure drop characteristics of supercritical CO2 flow in new Printed Circuit Heat Exchanger (PCHE) model using commercial CFD code, Fluent 6.3. First, numerical analysis for conventional zigzag channel PCHE model was performed and compared with previous experimental data. Maximum deviation of in-outlet temperature difference and pressure drop from experimental data is about 10%. A new PCHE model has been designed to optimize thermal–hydraulic performance of PCHE. The new PCHE model has several airfoil shape fins (NACA 0020 model), which are designed to streamlined shape. Simulation results showed that in the airfoil shape fin PCHE, total heat transfer rate per unit volume was almost same with zigzag channel PCHE and the pressure drop was reduced to one-twentieth of that in zigzag channel PCHE. In airfoil shape fin PCHE model, the enhancement of heat transfer area and the uniform flow configuration contributed to obtain the same heat transfer performance with zigzag channel PCHE model. And the reduction of pressure drop in airfoil shape fin PCHE model was caused by suppressing generation of separated flow owing to streamlined shape of airfoil fins.
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