Energy optimization in rapid flow variation systems

The paper tries to analyse the technical feasibility of optimizing the excess energy consumption in a quench blower using a variable frequency drive. Major application engineering considerations, like the cycle time of the blower and the mechanical stresses generated in the mechanical system of the blower, are analysed using computer simulation taking a specific case from a glass processing facility. One of the major findings of the simulation is that the acceleration and deceleration times of the blower are well within the limits set out by the process. The peak mechanical stresses generated in the system, namely the shaft, impeller and bearing, of the blower are also within permissible design limits. However, mechanical components, like impeller and shaft, could be susceptible to fatigue failure in the long run. As far as the drive is concerned, the regenerative energy during deceleration of the blower should be handled either by external equipment or by selecting an appropriate drive with regenerative capability.