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Energy Evaluation of Pumping Systems in a Clean Water Plant: A Study Case

Original scientific paper

Journal of Sustainable Development of Energy, Water and Environment Systems
Volume 11, Issue 4, 1110466
DOI: https://doi.org/10.13044/j.sdewes.d11.0466
Jovani Jabid Arenas Sarmiento1, Jesus Humberto Herazo Acevedo1, Vladimir Sousa Santos1, Jorge Ivan Silva Ortega1, John E. Candelo-Becerra2
1 Universidad de la Costa, Barranquilla, Colombia
2 Universidad Nacional de Colombia, Medellin, Colombia

Abstract

This paper presents a methodology based on the ISO-50001 standard to assess the energy impact of replacing standard efficiency motors with high-efficiency motors driven by variable speed drives in an industrial pumping system. The methodology includes the inspection and installation of the new technology, measurements, and data processing, as well as the analysis of the results. In addition, an energy efficiency indicator, an energy baseline, and a Pareto diagram are used, while the harmonics generated by new technologies are evaluated. The contribution of the methodology is that it allows for a comprehensive energy diagnosis using easily measurable data like electricity consumption and water flow, replacing the measurement of the motor's mechanical power in industrial conditions, which is a current challenge. The methodology applied in the case study showed that the technological changes made saved 36% of energy, and that the variable speed drives increased current harmonics by 10%.

Keywords: Cooling tower; energy efficiency; energy evaluation; electrical motor; ISO 50001; pumping system.

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