Performance Deterioration in High Effectiveness Heat Exchangers Due to Axial Heat Conduction Effects
The design of high-effectiveness heat exchangers for cryogenic applications requires consideration of axial heat conduction in flow direction, through exchanger core and fluids, an effect which generally can be neglected in conventional heat exchanger work. The most severe performance deterioration is encountered when both fluids have the same heat capacity rate. As indicated schematically in Fig. 1, the temperature difference between fluids which is already small throughout the exchanger is further decreased by axial conduction effects.
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