PERFORMANCE COMPARISON OF RECTANGULAR AND AIR-FOIL SHAPES OFFSET STRIP FLOW PATHS MICRO HEAT EXCHANGERS

摘要

Six micro heat exchangers with rectangle, airfoil and shuttle type strips was designed and fabricated in the present work. Two major parameters were considered for heat transfer performance comparison. One is the effect of strip type and the other is the strip arrangement. From the test results, we may notice that for both rectangle and airfoil strips heat exchangers, those with shorter strips performed lower thermal resistance than those with longer strips. Furthermore, the heat exchangers with more strips have better heat transfer performance. However, the space between strips is limited by the fabrication techniques.