Full-pressure issue of centrifugal fans
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I have a question for everyone: Can centrifugal fans experience the same issue of being unable to draw in enough fluid, just like centrifugal pumps? Is there a requirement for suction vacuum level? Does the total pressure of the fan need to take into account the pressure drop in the suction pipeline?
This post was last edited by henglinkou on 2020-11-11 at 13:17. The pressure drops at the inlet and outlet of the fan both need to be calculated. The total pressure for selection must be greater than (inlet pressure drop + outlet pressure drop). https://bbs.hcbbs.com/thread-2953230-1-1.html Correction: The total pressure of the fan = (pressure drop in the inlet pipe + pressure drop in the outlet pipe) + (pressure at the receiving end – pressure at the suction end) + dynamic head
Surge occurs when the inlet flow rate of the fan drops to a certain level (below the street-side flow rate). Excessive resistance in the fan inlet pipeline, rising temperature, and decreased molecular weight can all lead to surge.
This selection is incorrect; for different flow rates, the total pressure of fans of the same model, as well as the static pressure rise corresponding to those flow rates, vary. Inlet + outlet
This selection is incorrect; for different flow rates, the total pressure of fans of the same model, as well as the static pressure rise corresponding to those flow rates, vary. Inlet + outlet
I’m asking rudely, but are you working in design? Thank you! :)
For process fans, requirements should be based on static pressure, as it is the static pressure provided by the fan that is used to overcome pipeline resistance; in other words, the fan’s static pressure must be at least equal to the resistance of the entire system
For process fans, requirements should be based on static pressure, as it is the static pressure provided by the fan that is used to overcome pipeline resistance; in other words, the fan’s static pressure must be at least equal to the resistance of the entire system
Why discuss this without any design work involved?:lol
This post was last edited by henglinkou on 2020-11-11 at 13:15. To correct this: the total pressure of the fan = (pressure drop in the inlet pipe + pressure drop in the outlet pipe) + (pressure at the receiving end – pressure at the suction end) + dynamic head
Hello, someone on the 5th floor? I didn’t quite understand the diagram. For example: the flow rate is 13,900, the static pressure of the fan is 1,880, and the total pressure is 2,660?