Variable Speed Pumping for Level Control

The purpose of this paper is to describe an application of variable speed pumping to level control of an industrial process. Topics include a comparison of the process using control valves with a variable speed system, an energy savings and cost analysis, and a brief discussion of variable frequency drive design considerations. Energy savings figures are based upon actual electricity costs at the plant involved. Process duty cycle and energy requirement levels were verified by a wattmeter recording. The results of the application indicate that variable speed pumping is a viable energy savings alternative for process control