Control method of exhaust fan
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Two questions: 1. Estimating the system air volume – it is approximately 600 NM3/H, but it is difficult to select fans with a low air volume. Besides selecting fans with a higher air volume and using frequency conversion for regulation, are there any other ways to achieve control? 2. The system air volume fluctuates within the range of 500–3000 NM3/h; how can the air volume be controlled?
The key aspects to consider for such control are energy consumption and equipment investment; otherwise, control is not an issue. Choosing variable frequency is the best solution.
Variable frequency is the most convenient, while manual air valves are the cheapest