Abstract
Heat exchange performance of two stream parallel-flow type gas-gas micro heat exchangers has been investigated numerically. The flow passages of the micro heat exchangers are parallel-plate channels whose height ranges from 10 to 100μm and the length selected are 12.7 and 25.4mm. The numerical methodology is based on Arbitrary-Lagrangian-Eulerian method. The computations were performed for a wide range of the flow rate ratio to obtain the effect of the flow rate ratio, the channel height and the channel length on the rate of heat transfer. The results are presented as a form of temperature contour and the correlation between the effectiveness and Ntu is discussed.
