Is the fan pressure static pressure?
The full pressure is the algebra of static pressure and dynamic pressure: Pq = Pi ten Pb total pressure represents the total energy of l m3 gas. If the atmospheric pressure for the calculation of the starting point, it can be positive, it can be negative.
Refers to the pressure generated when the air flow, as long as the duct air flow has a certain dynamic pressure, its value is always positive.
The pressure generated by the irregular movement of air molecules on the wall of the pipe is called static pressure. Calculation, the absolute vacuum for the calculation of zero static pressure is called absolute static pressure. The hydrostatic pressure at atmospheric pressure is called relative static pressure. Air static pressure in air conditioning refers to the relative static pressure. Static pressure is higher than atmospheric pressure is positive, lower than
When the air flow along the duct wall, the pressure can be divided into static pressure, dynamic pressure and total pressure, the unit is mmHg or kg / m2 or Pa, China's legal unit is Pa.
In the choice of air conditioning or fan, often encounter static pressure, dynamic pressure, full pressure these three concepts. According to the knowledge of fluid mechanics, the vertical force acting on the unit area is called pressure
