Technical advancement in Air Supply Systems has reached another milestone, by the introduction of DC Blowers. Latest installations are, an array of DC blowers controlled by an algorithm which is programmed to constantly deliver required air volume at a set pressure.
This is achieved by continuous monitoring of the pressure drop across suction and delivery of Master Blower, hence regulating the rpm to maintain the same. Master blower, then, match the rpm of Slave Blowers to deliver required air volume. The attraction is, this technology can theoretically save electrical energy to the extent of 25% ~ 40% compare to a conventional centrifugal fan energy consumption for the installed capacity.
Our practical observation is, the savings around 55% (with fresh multi-stage filters) to 35% progressively, in a paint-shop environment. However, the rate of savings are subject to various dependencies. Other advantages are; rather silent operation, temporary isolation & blinding of any one of blowers - if faulty - and run the plant, etc., Operationally, the burden of adjusting the drive frequency to maintain required volume, when the filters are chocking progressively, is taken care by the system algorithm.
Thus simplifies, otherwise tedious task of Booth Air Balancing, a one-time activity. We have hooked real-time operational data with SCADA (optional) for close monitoring of each blower parameters. All this makes sense of choosing DC Blowers and on replacing a VFD driven centrifugal fan for an Efficient Air Supply System.