Corrected Blow Force at Standard Conditions (from ANSI B175.2)

[ckowalc]

We have a blowing performance measurement test (from ANSI B175.2) we perform to calculate flow rate and velocity with. The calculation spreadsheet is attached.

The inputs are:

• Nozzle Diameter (m)
• blow force (N)
• atmosphere temperature (°C)
• atmosphere pressure (hPa)
• atmosphere humidity (%)
• air stream temperature (°C)

And outputs (corrected for conditions) are:

• Average Velocity (m/s)
• Peak Theoretical Velocity (m/s)
• Flow Rate (m3/h)

I'd another output which would be corrected blow force (at standard conditions). This would be the blow force I would obtain if I took the same fan and tested it under the following conditions:

• atmosphere temperature = 25°C
• atmosphere pressure = 990 hPa
• atmosphere humidity = 0 %

It would be easier to know which fan is most powerful (most blow force) even if you test them under different conditions. A lot of fans have different nozzle diameters and sometimes it turns out that the Flow Rate on one fan is higher but the Velocity is lower. It'd be simpler to just compare one number.

 

[Achy47]

I understand the importance of standardized conditions in order to accurately compare and measure results. The additional output of corrected blow force at standard conditions would provide a valuable metric for comparing the performance of different fans. By normalizing the conditions, we can ensure that the results are directly comparable and not influenced by external factors such as temperature and humidity.

In addition, having this corrected blow force value would also provide a more accurate representation of the fan's true power and performance. This is especially important when evaluating fans with different nozzle diameters, as the flow rate and velocity alone may not accurately reflect the actual power of the fan.

I would suggest incorporating this corrected blow force output into the performance measurement test and spreadsheet, as it would provide a more comprehensive and standardized evaluation of the fans. It would also make it easier for users to compare and select the most powerful fan for their needs.

Thank you for sharing this valuable information and for considering my suggestion. I believe that incorporating the corrected blow force output will greatly enhance the accuracy and usefulness of the performance measurement test.