Reduction of Electricity Consumption and Water Cost in Pump Application

Abstract

Energy savings in pump application can be realized by improving the energy efficiency of each component of the system. The losses in pump application can be categorized into adjustment losses and dimensioning losses. The paper is aim to show that adjusting the pump speed with Variable Speed Drive (VSD) and using VSD to control parallel pumps can bring reduction of both losses and potential energy and economic savings. The purpose of the study is to determine the more efficient and versatile ways to increase the energy efficiency in pumping system. The study has identified four main opportunities to achieve significant energy and economic savings: by using energy efficient motors and pump, the right dimensions of motor rated power and pump, adjustment of pump speed by VSD instead of throttling valve, control of parallel pumps by VSD. The paper has examined the feasibility of using variable speed drives to adjust the speed of pump application and control of parallel pumps in Lezha pumping station. The paper aims to highlight, based on life cycle analysis that the proposed measures have ensure potential reduction of energy consumption from 20% up to 40%, reduction of CO2, reduction of maintenance costs of pumping systems, improvement of financial situation of Lezha water company, etc.