TABBED TRANSFER FINS AND AIR-COOLED HEAT EXCHANGERS WITH TABBED FINS

摘要

Heat transfer fins (110), and heat exchangers (100) incorporating such fins(110), enhancing heat transfer with acceptable pressure drop increase. Thefins (110) include tabs or secondary fins bent upward and downward from thefin body at a selected bend angle. All or a majority of the tabs are alignedwith a simple flow path or with local flow paths for cooling air adjacent thefins (110) to minimize turbulence and pressure drop. The tabs are planar andgenerally aligned parallel to the simple flow path or local flow paths and arearranged so as to serve as a plurality of sites for starting new boundarylayers by offsetting the tabs such that downstream tabs are not shadowed byupstream tabs. The tabs have a height sufficiently large to extend the tabsout into boundary layers on the fin (110). The tabs provide more uniform flowover fins (110) and shrink wake size behind tubes (120).