Patent ID: 6516871
Filing Date: 2003-02-11
Classification: F28D

Abstract:
A heat transfer assembly for a heat exchanger comprising a plurality of first heat absorbent plates and a plurality of second heat absorbent plates stacked alternately in spaced relationship thereby providing a plurality of passageways between adjacent first and second plates for flowing a heat exchange fluid therebetween in a longitudinal direction, each of said first and second plates having a plurality of undulations extending at an angle to said longitudinal direction, and each of said first plates having a selected length in said longitudinal direction and further having a plurality of spaced apart longitudinally extending parallel rows each containing a plurality of spaced apart longitudinally extending dimples wherein a portion of said dimples project outwardly from one side of said first plates and another portion project outwardly from the other side of said first plates and wherein the total accumulated length of dimples in each row is less than 50% of said selected length of said plate, said dimples forming spacers between adjacent plates.