What is the consequence of a sudden increase in the wind volume of the fan?

When the model, power and speed of the fan have been determined, the air volume of the working condition suddenly rises (between 20% and 40%). What are the consequences?

Let me first assume that your problem is: after the fan is installed in the system, because of the additional changes in the design, the amount of air pumping required by the site is increased by 20%-40% compared with the original design value;

If the inlet and outlet conditions of the fan and ventilation system and the ventilation system are the same as before, there is no change, and the original design value, no matter how much air volume you need to increase, there will be no impact, the system will only pump The originally designed air volume value, because the actual air volume is only affected by changes in the inlet and outlet conditions of the fan and ventilation piping system and the ventilation system, and is not affected by changes in your demand;

Now: the operating conditions of the fan are unchanged, if the inlet conditions change; for example: the closed circuit of the ventilation pipe is directly connected to the exhaust gas source, and when the exhaust gas source increases the amount of air to be treated, it will push into the pipeline when it increases, then form a system for the system. Positive pressure, the pressure load of the fan is light, the air volume pumped will increase, and the power will increase.

There are many situations, and if you can specify the situation, you can analyze it in more detail.

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