Explain the relationship between duct velocity, static pressure, and total pressure in an air distribution system.

In an air distribution system, the relationship between duct velocity, static pressure, and total pressure is fundamental to understanding airflow dynamics. Total pressure represents the sum of static pressure and velocity pressure. Static pressure is the potential energy of the air, representing the force exerted by the air on the duct walls. It is the pressure that would be measured by a gauge that is not affected by the moving air. Velocity pressure, on the other hand, is the kinetic energy of the air, representing the pressure due to the ....