Now, the S.P. and SYS lines intersect at 8,650 Cubic Feet Per Minute, and tracking where the red line crosses this point (again, going to the right axis), shows a horsepower of 73.0 BHP.
The result? The 8.13% speed increase requires a horsepower increase from 57.8 to 73.0, or 26.4% (which is the increase in speed, cubed).
These are the most basic of the Fan Laws. They’re often called the “Three Fan Laws.” And as stated above, they illustrate what changes when speed is the key variable. However, other variables include fan size and air density, and these Fan Laws become more complex. All in all, Illinois Blower applies 12 Fan Laws in building the ideal solution.
Knowing Fan Laws is helpful, but no one relies on doing the math and hand-drawing fan curves. There are many software tools that can be applied, including our own fan selection software. Software can identify options, but knowledge, skill and experience are critical in finding the solution that will maximize reliability, provide superior performance, and minimize maintenance and service requirements. In some cases, the best answer also requires some creativity. For example, our team recently designed a daisy-chained dual-fan solution to best meet a particularly challenging requirement.
In addition, fan selection often has to be performed with space and size limitations, sound considerations, maximum energy limits, high temperatures, specific sealing needs, ducting issues and many other factors. Illinois Blower engineers can help optimize every aspect, including selecting the right impeller design, identifying the most appropriate housings, and specifying the best materials.
Whatever the solution requires, Illinois Blower has more than 44 years of experience engineering custom fans that meet the most demanding requirements and operate in the most demanding conditions. Contact us today to talk about how we can help you best meet your industrial fan and blower needs.