Formula for Shaft Power

xq

Q:Suction Volumetric Flow Rate,m³/min;

ρ:Gas Density,kg/m³。The conditions under Standard State is 20℃,1atm,Density:1.205

K:Gas adiabatic index。Air of Gas adiabatic index is 1.4;

R:gas constant:J/(kg.k),Air of gas constant is 286.7;

ε:Pressure Ratio:Suction Abs Pressure/Discharge Abs Pressure

xq:Variable efficiency, the higher the efficiency, the better the blower performance

xq:Suction temperature,K, normally calculated as 293(namely 20℃)

Formula of Total Operation Power:

xq

xq:Motor Efficiency,(Motor Efficiency is 0.97-0.99)

xq:Inverter(VFD) Efficiency,(VFD Efficiency:0.97-0.99)

K:Margin coefficient. To ensure the safe operation of the blower, the margin coefficient is generally 1.1-1.5.

Note: The above is the theoretical calculation formula, the specific model is subject to the performance curve provided by the technical department.

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