Uncover significant energy cost savings with our VFD calculator. Variable Frequency Drives optimize motor speed for pumps, fans, and conveyors, drastically reducing electricity consumption. Estimate your potential savings and improve operational efficiency today!
Formula:
The VFD Energy Savings Calculator estimates annual cost reductions primarily for variable torque loads like pumps and fans, where power consumption decreases significantly with speed reduction (often following the cube law). The formula used is:
Annual Savings ($) = P × H × L × [ 1 - (1 - SR/100)3 ] × C
- P: Rated Motor Power (kW)
- H: Annual Operating Hours (hours/year)
- L: Average Motor Load (as a decimal, e.g., 0.75 for 75%)
- SR: Average Speed Reduction (%) achieved by the VFD
- C: Electricity Cost ($/kWh)
This formula highlights the exponential savings from even small speed reductions in specific applications.