The design of fan parameters must be reasonable.
From the previous analysis, if the margin of the fan is too large, the efficiency of the fan will be reduced. Therefore, whether the design of the fan parameters is reasonable will directly affect the actual operating efficiency of the fan, which is the basis for energy saving and consumption reduction of the fan.
Today’s fan technology has made great progress, and the fan’s performance is relatively accurate. When designing the parameters of the fan, there is no need to leave a large margin. The design of the margin must comply with the principle of moderation.
In addition, when doing the design and calculation of the fan system, advanced CFD simulation technology can be used to simulate and calculate the resistance, air volume, and other parameters of the system. Such calculations can obtain more accurate results, which are more accurate than the traditional calculation of fan parameters based on empirical coefficients. Close to the actual situation.
For the modified fan, the resistance and flow rate of the system can be tested on-site first, and then a new fan can be selected based on the actual situation. In this way, the operating parameters of the new fan will be closer to the actual demand, thus making the fan operation more efficient.
Optimize the design of the ventilation system
The fan works in the system. It makes no sense to talk about the fan apart from the system. The working efficiency of the fan has a great relationship with the system. This has been analyzed before. It must be done during the design stage to improve the actual operating efficiency of the fan. System optimization design focuses on the following points:
- The design of the piping system must be reasonable to avoid sharp turns or sudden changes in the flow area. Set guide vanes at pipeline elbows according to circumstances to reduce airflow loss.
- The margin for fan parameters should be moderate and not too large. The closer the actual working point of the fan is to the design point, the closer the actual operating efficiency of the fan will be to the design efficiency.
- The pipes at the entrance and exit of the fan should be designed with a long enough straight pipe section, or a rectifying grille should be used in the pipeline. This can reduce the turbulence of the airflow in the entrance and exit pipes, thereby improving the efficiency of the fan.
Choose the appropriate fan adjustment method！
The fan works in the system, and the actual system resistance will inevitably deviate from the theoretical system resistance. Therefore, in actual operation, the working point of the fan needs to be adjusted to adapt to the actual resistance requirements of the system.
The adjustment methods of the fan generally include the following: inlet baffle adjustment, inlet guide vane adjustment, moving blade adjustment, and variable speed adjustment. The resistance loss caused by the inlet baffle adjustment and inlet guide vane adjustment is relatively large, so the fan’s efficiency will be reduced. The moving blade adjustment and variable speed adjustment change the performance of the fan by adjusting the angle and speed of the blades without adding additional resistance loss. Therefore, the fan efficiency is high and it is an efficient and energy-saving adjustment method and should be used first.
