Optimal sizing and operation of pumping systems to achieve energy efficiency and load shifting

Energy efficiency improvement for pumping system is an important problem for industrial energy systems. This article aims to improve pump efficiency by an approach based on energy efficiency classifications. To this purpose, an optimal pump sizing model is presented for new pumping system design, and an optimal pump operational control model is also given for existing pumping systems to minimize energy consumption cost and improve energy efficiency. Closed-loop model predictive control strategy is further applied for the pump operational control. These models show that the energy efficiency classification in terms of system performance, operation, equipment and technology (POET) is applicable to the pumping system energy efficiency study. Examples are given to illustrate the proposed models, which also convince the applicability of POET energy efficiency classification in the pumping system study. (C) 2011 Elsevier B.V. All rights reserved.