Factors affecting range hood efficiency
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Factors affecting the efficiency of the exhaust fan: After emergency repairs were carried out in the workshop and the rotor of the exhaust fan was replaced, the power consumption of the main fan motor increased by 500 kW after it was turned on. What could be the reason for this? There were no significant changes in the operating parameters (such as regenerator pressure or the opening degree of the double-acting slide valve)
It is important to check whether there are any changes in the clearance between the stationary and rotating blades as well as the clearance around the rotor disk after maintenance; these factors can affect efficiency. Additionally, the removal of deposits from the stationary and rotating blades after maintenance can lead to an increase in these clearances, thereby reducing the efficiency of the smoke extractor. After operating for a while, as more deposits accumulate, the efficiency may increase again.
1. The inlet temperature of the smoke extractor is very important. 2. Regenerator load, flue gas quality. 3. Issues related to the installation of the stationary and rotating blades in the turbine, such as the gap between these blades, and whether there are any data discrepancies between the new rotor blades and those of the old rotor
Have you encountered this situation there? How long does it take approximately?
Personally, I think it’s a period of adjustment; just like with cars, a new one isn’t necessarily the best option! It’s recommended to observe for a while first:D
That makes sense; the key point is that only the extractor fan rotor was replaced, while no other components were changed
The key reason is that because of the replacement, running in is necessary!
It’s been 2 months since work started, and the motor power is still high. Could it be that our exhaust fan has been operating well this month?:lol
It’s very likely that the rotor efficiency is low. I’m not sure what the power rating of your smoke extractor is; ours is around 90,000. Based on our figures, the efficiency is about 0.5% lower, which should still be within the normal range
Are you sure your flue gas temperature is the same as before? The flue gas temperature is very important