마이크로 채널 PCHE의 압력손실 및 열전달 특성에 관한 연구

A newly developed PCHE (Printed Circuit Heat Exchanger), which has a longitudinal corrugation flow channel, was fabricated using etching and diffusion bonding to evaluate its hydraulic performance. The purpose of this research is to examine the thermal and hydraulic performance of the PCHE in cryogenic temperature region. The test has been conducted with helium gas test apparatus under cryogenic temperature. The pressure drop and ineffectiveness calculated from the measured pressures and temperatures are discussed. The thermal performance is predominantly affected by the axial conduction heat transfer at lower Reynolds number range. The simple performance calculation model is presented and the ineffectiveness calculated from the model is compared with the experimental data.