What are the problems if the outlet diameter of a centrifugal fan decreases?
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If I install a centrifugal blower with an outlet pipe diameter changed from DN50 to DN32, will there be any problems?
There will definitely be problems; the wind speed is too high
There will be problems: the wind speed will increase and heat will be generated
It cannot be reduced in size; otherwise the fan’s seals and the motor will get damaged
It is similar to reducing the cross-sectional area of the outlet pipe, just like closing the valve at the fan’s outlet. I don’t know why you changed it this way; why not make it smaller instead? Change it to DN20, DN10, or even smaller,,,。 ?
In my opinion, when the size is reduced, the wind speed increases, and the air volume may not reach the rated flow rate.
Due to the issue with fan selection, I chose one with a slightly higher output; its outlet duct is 50 in diameter, but the branch ducts are already available and have a diameter of 32
As long as it remains within the performance curve range of the fan, there is no problem at all; if the outlet temperature rises, an return pipeline can be added
The fan generates heat due to compression, and the increased flow rate can cause damage to the equipment
Check if there are any guidelines for controlling the fan; consult the manufacturer to find out how to adjust it. If the air flow at the outlet is too low, it might cause the motor to burn out
Generally, it involves adjusting the size of the inlet and the air flow rate, without causing any damage to the fan