What is the effect of high velocity on air friction in ducts?

High velocity in ducts has a direct impact on air friction due to the physical dynamics of fluid flow. As air moves at a higher speed through ductwork, it encounters more friction with the duct surfaces. This is attributed to the increased turbulence and resistance generated by the faster moving air, which leads to higher friction losses. The relation can be understood through fluid dynamics principles, where the friction loss increases with the square of the velocity.

Consequently, in a high-velocity system, the design and material thickness of the ductwork must accommodate these heightened friction losses and ensure that the system operates efficiently. Understanding these principles is crucial for HVAC technicians when designing or evaluating duct systems, as tackling friction loss effectively can lead to improved system performance and energy efficiency.