Cooling tower integrated inlet louver fill
A fill sheet arrangement in a direct heat exchange section of a cooling tower is provided. Each fill sheet includes ridges, grooves, separators, and an air inlet louver zone itself having ridges, grooves and separators, that improve the performance of the fill sheet arrangement when installed as a direct heat exchange section of a cooling tower. The air inlet louver zone improves the air flow capabilities and performance of the direct heat exchange section by limiting the evaporative liquid from leaving the fill sheet.
1. An indexing feature for louvers in a direct heat exchanger, the indexing feature comprising:
a first louver zone having a plurality of spaced ridges and grooves, a second louver zone adjacent the first louver zone and having a plurality of spaced ridges and grooves, wherein the ridges of the first louver zone are aligned with and adjacent the grooves of the second louver zone thereby forming a plurality of air tunnels between the first louver zone and the second louver zone;
a recessed ridge of one of the ridges of the second louver zone, the one ridge forming at least a portion of one of the air tunnels;
two guide walls of the one ridge of the second louver zone extending from the recessed ridge toward adjacent grooves of the second louver zone;
a male indexer of the first louver zone extending from one of the grooves of the first louver zone to the recessed ridge of the second louver zone, the one groove forming at least a portion of the one air tunnel;
air passageways between the male indexer and the adjacent guide walls;
two locally lowered ridges, each locally lowered ridge having a portion lowered by a respective curved ridge cutout and being situated in the first louver zone adjacent the male indexer and on opposite sides of the male indexer,
two grooves of the second louver zone adjacent the recessed ridge and on opposite sides of the recessed ridge;
each of the curved ridge cutouts of the first louver zone are adjacent one of the grooves of the second louver zone; and
a pair of air bypass openings each defined at least in part by one of the locally lowered ridges of the first louver zone and the adjacent groove of the second louver zone that permit airflow between the one air tunnel and adjacent air tunnels.
2. The indexing feature of claim 1 wherein the curved ridge cutouts each include an arcuate surface that guides air around the male indexer.
3. The indexing feature of claim 1 wherein the curved ridge cutouts start near a base of the male indexer and open up toward a plane of the plurality of ridges at an angle of 30 to 60 degrees.
4. The indexing feature of claim 1 wherein the two locally lowered ridges of the first louver zone each include a curved, upper edge.
5. The indexing feature of claim 1 wherein the male indexer includes a convex outer surface and the curved ridge cutouts each include a concave surface facing the convex outer surface of the male indexer.
6. The indexing feature of claim 1 wherein the plurality of ridges of the first louver zone contact the plurality of grooves of the second louver zone.