Detailed analysis of high-pressure fan performance curve
The high-pressure fan performance curve usually includes: curve changes such as the relationship between air volume Q, wind pressure H, power N, and efficiency η.
The performance curve of a high-pressure fan usually has only two coordinate axes: the pressure and the air volume of the fan. This is also simplified for the convenience of customers. It is easy to understand, simple and clear, and does not make too many labels.
At the same time, for the convenience of use, the performance curve of the high-pressure fan includes (provided that the protection does not change under a certain speed) the change of positive or negative pressure with air volume, static pressure with air volume, and power with air volume. The change, the total efficiency changes with the air volume, and the static efficiency changes with the air volume. Simply put, as long as the air volume changes, the pressure will inevitably change, and vice versa.
So why is this happening?
This is due to the compression ratio and efficiency. The input energy consumption and the output energy consumption cannot be 100% the same, and if such a high pressure is generated, it is bound to compress the air strongly and increase the density. Will result in a reduction in overall capacity.
The detailed analysis and understanding of the high-pressure fan performance curve is as follows: (shown in the figure, the common model 720 is taken as an example, shown by the arrow)
Other types of fans are similar, and the parameters that need to be referenced are nothing more than the most important ones. It is easy to understand if you carefully understand them.
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