Introduction

One of the most commonly used types of cooling tower fill is film fill. It is widely used because of its high heat transfer efficiency and compact structure.

Structure of Film Fill

Film fill consists of corrugated plastic sheets arranged in blocks. Water flows along these sheets as a thin film while air passes through the channels.

Working Principle

As water spreads across the sheet surfaces, it forms thin layers that greatly increase the evaporation area.

Advantages of Film Fill

• High cooling efficiency
• Compact tower design
• Lower material weight

Limitations

Film fill requires relatively clean water because narrow channels may become clogged by debris or scaling.

Conclusion

Film fill remains the most efficient cooling tower fill design for many industrial applications when water quality is properly controlled.