Comparative analysis of jet impingement and microchannel cooling for high heat flux applications

In this work, a comparative investigation of jet impingement and microchann el cooling is presented. The thermal performance of each technology evaluat ed at the respective optimal condition is compared to each other with the t arget dimension as a main parameter. It is revealed that the microchannel c ooling is preferable for a target dimension smaller than 0.07 by 0.07 m, wh ile the jet impingement is comparable or better than the microchannel cooli ng for a larger target plate if a proper treatment is applied for the spent flow after the impingement. Various pertinent aspects of each technology a s well as a detailed comparative analysis of the two technologies are prese nted. In selecting a technology from the two, the economic aspects, such as manufacturing and maintenance cost, also have to be taken into account, si nce the better performing one may not be necessarily the more suitable one. (C) 1998 Elsevier Science Ltd. All rights reserved.