Baffel

Baffel is a term used in engineering and acoustics to describe a plate, wall, or partition installed inside a device, duct, tank, or enclosure to direct, split, or dampen the flow of liquids or gases, or to control sound. The spelling and usage vary by language; for example, baffel is common in Danish and Norwegian, while the English equivalent is baffle.

In acoustics, baffels are placed to reduce sound transmission and control reflections within a space. They can isolate sound-producing components, break up standing waves, and improve the acoustic characteristics of rooms, ducts, or speaker enclosures. In ventilation and exhaust systems, acoustic baffling helps to lower noise levels without significantly restricting airflow.

In fluid handling and process equipment, baffels guide flow, enhance mixing, or prevent unwanted vortex formation. In tanks and reactors, they reduce splashing and wall sloshing, aiding stability and sampling. In shell-and-tube heat exchangers, baffel plates direct the shell-side fluid across the tube bundle to improve heat transfer and provide structural support for tube sheets.

Materials and design considerations include strength, temperature resistance, corrosion resistance, and compatibility with the conveyed media. Baffels are typically made from metal, plastic, or composite materials and may be bolted, welded, or clipped in place. Their spacing, size, and orientation are chosen to balance flow, heat transfer, noise reduction, and cost.

See also: baffle, acoustic panel, heat exchanger, flow control.