HOWTO IMPROVE RELIABILITY IN CENTRIFUGAL PUMP SYSTEMS THROUGH THE AUTOMATIC TUNEUP OF PUMPS WITHIN THEIR BEST OPERATIONAL CONDITION

摘要

Many centrifugal pump reliability problems are closely related to oversizing of pumps, which leads to highly restricted discharge valve operation, and flowrates are far below the best efficiency point (BEP), which are associated with low hydraulic efficiencies and high discharge pressures. This paper presents the development of, and the main results achieved by, a new control technology that is able to keep the pump operating at its best condition independent of process requirements. In most cases it solves all of the above-mentioned problems, therefore improving reliability and mean time between failures. In addition, environmental conditions improve and energy is saved. The concepts of specific energy (Es) and life cycle cost (LCC) are discussed and, based on them, payback time of the pilot project is estimated. Finally, some comments about this experience are made along with other important conclusions.