Confirm Axial Fan operating point

For "Axial Fan" should be noted that, although reflecting fan total energy concept with full pressure, but the pressure of the whole kinetic energy tends to account for a large proportion, but really overcome the pipeline resistance is part of the total pressure of the kinetic energy. Official channel resistance is large, with a total pressure to determine the operating point is difficult to meet the requirements of the system. Thus the fan operating point and sometimes static pressure flow curve Pst-QV and characteristic curve of the intersection of M, see Figure 5-1 p-QV fan performance curve and characteristic curve intersection N is the total points of the fan.