VFD Application for Energy Saving in Pumps and Fans

The Energy Crises

Traditional Flow Control Approach

Variable Frequency Drives, the Smart Solution

  1. Flow is proportional to shaft speed
  2. Head (pressure) is proportional to the square of shaft speed
  3. Power is proportional to the cube of shaft speed

VFD Flow Control Limitation and Solution

VFD Flow Control Economic Benefits

Dramatic energy cost reduction obtained by elimination of the pressure drop across the pump

Better control leading to reduced process variability and increased in-spec product

Reduced overall plant maintenance cost

Eliminating of a source of fugitive emissions

Improvement in plant power factor

Conclusion, VFD is Better than FCV