Heat Transfer Characteristics in Microchannel Heat Exchanger under Non-uniform Heating

In This paper, the heat transfer characteristics were evaluated using a microchannel heat exchanger that is actually in use. The microchannel heat exchanger consists of aluminum fins combined with flat perforated tubes with multiple channels made of aluminum. Although the specific heat transfer area of this heat exchanger is larger than that of the conventional type, the multiple flow paths may cause maldistribution and flow oscillation. Experimental results clearly expressed the decay of the heat transfer performance by nonuniformity of heat flux.