John C. Hensley - Marley SPX Cooling Technologies, Inc.'s Cooling Tower Fundamentals PDF

By John C. Hensley - Marley SPX Cooling Technologies, Inc.

A guide to supply the fundamentals of cooling towers, from the workers of the Marley Cooling Tower corporation.

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The evolution of louver design began in the early era of splash type fill, more than a half century ago, at which time their primary function was to control the multitude of random water droplets produced by the splashing action. Because of the width and spacing necessary to accomplish this magnitude of water recovery, louvers became a highly visible, accented part of the cooling tower's appearance, as evidenced by Figure 49. With the advent of acceptable film type fills, with their inherently better water management characteristics, louver design was reassessed.

Fig. 49) The most-utilized louver materials are corrugated fire-retardant fiber reinforced polyester and treated Douglas Fir plywood on field-erected towers, galvanized steel on factory-assembled steel towers, and precast, prestressed concrete on concrete towers. The evolution of louver design began in the early era of splash type fill, more than a half century ago, at which time their primary function was to control the multitude of random water droplets produced by the splashing action. Because of the width and spacing necessary to accomplish this magnitude of water recovery, louvers became a highly visible, accented part of the cooling tower's appearance, as evidenced by Figure 49.

Sect. I-H-2) Closely spaced, steeply sloped louvers afford maximum water containment, but are the antithesis of free air flow, and can contribute to icing problems. Increasing the horizontal depth (width) of the louvers significantly increases their cost, but it permits wider spacing, lesser slope and improved horizontal overlap, and is the design direction taken by most reputable manufacturers. (Fig. 49) The most-utilized louver materials are corrugated fire-retardant fiber reinforced polyester and treated Douglas Fir plywood on field-erected towers, galvanized steel on factory-assembled steel towers, and precast, prestressed concrete on concrete towers.

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Cooling Tower Fundamentals by John C. Hensley - Marley SPX Cooling Technologies, Inc.


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