Abstract: Electric energy is needed more and more over time, being a support of our entire life. Therefore the discovery of new sources of clean energy and new technologies became an important goal for scientists. The same attention has to be paid to the reduction of energy consumption as well as to the efficiency improvement of the consumers. Water pumping stations are among the most important electrical energy consumers all over the world and especially in Dobroudja region, Romania, where they play a leading role in the agricultural land improvement. A problem encountered by water suppliers is the ageing of the infrastructure. Most of the existing pumping stations have been in service for over thirty years. This long duration has resulted in unreliable service, and low energy efficiency. Therefore the old pumping stations have to be modernized.
An energetic perspective on the old pumping stations must take into account both the pumps and the pipeline. These two components of the hydraulic system should work in good compliance that means the pumps have to meet the energetic needs of the fluid to overcome the resistance to movement opposed by the pipelines. The increase in efficiency of the existing pumping stations involves an energetic audit of the pumps, a thorough study on the pipelines and identification of optimal technical measures to improve the energetic transfer to the liquid. The paper presents a hydraulic study as a basis for decision-making with respect to the technical solutions adopted for the modernization of three pumping stations and the gain in energy efficiency.
The increasing operation efficiency of a pumping installation results in a significant saving of electric energy which means:
- a substantial reduction of the pumped water price, which will definitely have a positive social impact
- an important decrease of the indirect air pollution, assuming electrical energy produced from coal.

Brief Biography of the Speaker:
Anca Constantin was born in Constanta, Romania, in 1959. She graduated in mechanical engineering at The Polytechnic University of Bucharest, Romania, in 1983 and took her PhD degree in hydraulics and fluid mechanics at The Faculty of Civil Engineering, “Ovidius” University, Constanta, in 1998. She worked as a researcher in the Romanian Navy, and since 1999 she has been teaching at “Ovidius” University, Constanta, Faculty of Civil Engineering. At present she is Associate Professor and head of department.
She published 5 books and over 60 scientific articles. Her research field is fluid mechanics and applied hydraulics. As a researcher she participated in over 50 projects and received 7 innovation licenses. Anca Constantin is a member of The General Association of the Engineers in Romania since 2004 and a member of the Romanian Committee for the History and Philosophy of Science and Technique, Romanian Academy, since 2010.