How to calculate wind pressure with wind speed for Roots blower of pneumatic conveying in food factory?

How to know the air pressure of Roots blower, air compressor and other fan equipment for pneumatic conveying in food factory without relevant equipment? Let Fan tell you a trick to estimate wind pressure with wind speed.

Through the anemometer, we can know the current wind speed of the fan equipment. According to Bernoulli equation, we can get the formula of the relationship between wind pressure and wind speed:

1: WP = 0.5× ρ × V

Where wp is wind pressure [kn/m] (kpa), ρ Is the air density [kg/m], and v is the wind speed [m/s].

Because air density（ ρ) And gravity（ γ) The relationship between γ = ρ = γ/ g. So there are ρ=γ/ g. We put ρ=γ/ G is substituted into the relationship in (Formula 1) to get:

Formula 2: WP=0.5 ××× γ × V/g

Under standard conditions (i.e. atmospheric pressure 101325Pa, temperature 15 ℃, air density 1.25 kg/m), air gravity γ = 0.01225 [KN/m]。 The gravitational acceleration at latitude 45 is G=9.8 [m/s], which can be obtained by substituting formula 2 as WP=0.5 × 0.01225 × V/9.8. After calculation simplification, we can get:

Formula 3: WP=V/1600

This formula can be used as a general formula for calculating wind pressure with wind speed. However, it should be reminded that the air density, gravity and gravitational acceleration will change with latitude and altitude. Air density on plateau（ ρ=γ/ g) It is smaller than the plain area, that is, under the same wind speed and temperature, the wind pressure on the plateau is smaller than the plain area.