Boiler burner power issue
Thread Content
Hello everyone. We now have WNS boilers and burners. When the control dampers of the boiler chimney were adjusted to change the boiler’s back pressure, it was found that at low temperatures, when the fan frequency remained the same, the power consumption of the fan motor varied. I remember that it was mentioned in \"Pumps & Fans\" that the motor power of a fan is only related to the frequency; when the frequency remains the same, the motor power of the fan also remains the same. (P1/P2=(n1/n2)^3. Why does the motor power of a fan at the same frequency change when the pipeline resistance changes? Please help to answer. Thank you.
Because the wind pressure has changed. It can be considered that the forces doing work are all different. The sentence you mentioned should be understood in this way: for the same fan, at a fixed frequency, the maximum power it can achieve is the same. Of course, the power can be low when the resistance is small.