How to calculate the air volume of Roots blower with formula?

Wandering on the forum today, I saw another friend asking about Roots blower. The question of the netizen is as follows: the nameplate of a Roots blower is marked 463m3/min, because the inlet temperature, ambient temperature, inlet and outlet pressure of the machine change. How to calculate the actual air volume?

After seeing such a problem, I first need to understand the following knowledge: What factors will affect the air volume of Roots blower?

1. Ambient pressure

It is easy to understand that the air density and content in plain area and plateau area are different, so the atmospheric pressure will affect the air volume. The most complete summary of Roots blower parameters! sole!

2. Internal leakage

There is a certain gap between the internal parts of the fan. Roots blower is a mandatory conveying equipment. During the conveying process, the gas will return through the gap, which has a certain impact on the air volume.

3. Environment and temperature

The air volume delivered by Roots blower varies with the environment and surrounding temperature, such as humid environment, summer and winter, which will affect the water vapor in the environment and the overall density and quality of the air.

These are three basic air volume influencing factors. The netizens mentioned the inlet temperature, ambient temperature, and inlet and outlet pressure. Roots blower is a constant flow fan. The front pipe pressure changes within a reasonable range, and the air volume delivered by the fan will not change. If the pressure is too high, the fan will reverse, causing damage to the fan. In the actual working environment, if our fan does not have serious internal leakage, the air volume of the fan is generally marked on the nameplate.

In the actual working condition, it is difficult to calculate the air volume of Roots blower according to the formula. The simplest way is to purchase an air volume and air pressure measuring instrument and determine it according to the numerical standard of the measuring instrument.

If we must use a calculation formula to calculate the air volume, we can explain Q2: the volume flow of the blower in use T2: the inlet air temperature in use P2: the ambient atmospheric pressure in use (that is, atmospheric pressure) according to the Vander Waals ideal gas state equation and the formula Q2=(Q1 × T2 × P1 × (1+D2))/(T1 × P2) Q1: Air volume flow under standard condition T1: Air inlet temperature under standard condition P1: Air inlet pressure under standard condition D2: Air moisture content under service condition

If you have any questions about the purchase of Roots blower, you can contact our official customer service hotline.