Views: 0 Author: Site Editor Publish Time: 2025-12-29 Origin: Site
Cooling tower fills are the heat-transfer media that increase contact between water and air to improve evaporation. Based on construction and application, they are mainly classified as follows:
How it works: Water breaks into droplets and splashes as it falls over fill elements.
* PVC / PP (modern)
* Wood or ceramic (older towers)
* Bar splash fill
* Grid splash fill
* Film-type splash hybrid
* Handles dirty or high-TDS water
* Less clogging
* Easy to clean and maintain
* Lower thermal efficiency than film fill
* Requires more tower height
* Power plants
* Steel mills
* Petrochemical & industrial cooling towers
How it works: Water spreads as a thin film over corrugated sheets, maximizing surface area.
* High heat-transfer efficiency
* Lightweight, compact
* Sensitive to fouling and scaling
* Temperature limit ≈ 55–60°C
* HVAC cooling towers
* Chiller condenser water systems
* BAC, Marley, EVAPCO towers
* Higher temperature resistance (up to ~80–90°C)
* Better chemical resistance than PVC
* Industrial cooling towers
* Hot process water
Film Fill Flow Arrangements
* Counterflow fill – vertical sheets, higher efficiency, compact design
* Crossflow fill – angled sheets, easier maintenance, gravity distribution
* Wider flute spacing
* Thicker sheets
* Reduced blockage
* Longer service life with poor water quality
* Retrofit projects
* Towers with suspended solids or biological growth
* Hexagonal or square passages
* Uniform air-water contact
* Good structural strength
* Crossflow cooling towers
* Medium-efficiency industrial systems
* Combination of film and splash mechanisms
* Moderate fouling with need for better efficiency than splash fill
| Water Quality | Recommended Fill |
| Clean water (HVAC) | PVC film fill |
| High temperature | PP film fill |
| Dirty / fouling water | Splash fill |
| Retrofit / clogging issues | Low-clog film fill |
| Large industrial towers | Splash or PP film fill |
