A large proportion of the electricity produced around the world is used to raise, move or pressurize liquids and gases with machines such as pumps, fans and compressors.
Given the increasing importance of controlling energy consumption, special attention must be paid to the way these machines are operated and the energy savings that can be achieved through variable speed control. These different aspects will be dealt with in this Cahier Technique publication, both from the qualitative and quantitative standpoint. Variable speed drives are among the front-ranking solutions proposed by Schneider Electric to increase Energy efficiency.
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Detailed dynamic pumping energy models for optimization and control of wastewater applications
Despite the increasing level of detail in wastewater treatment process models, oversimplified energy consumption models (i.e. constant ‘average’ power consumption) are being used in optimization exercises. A new dynamic model for a more accurate prediction of pumping costs in wastewater treatment has been developed to overcome this unbalance in the coupled submodels. The model is calibrated using two case studies. The first case study concerns the centrifugal influent pumps (Nijhuis RW1-400 · 525A) of the municipal wastewater treatment plants (WWTPs) in Eindhoven (The Netherlands), governed by Waterboard De Dommel. For the second case study, concerning a centrifugal pump (Flygt, type NT3153 · 181) of the intermediate pumping station (pumping primary treated wastewater) of the Mekolalde WWTP, located in Bergara (Guipúzcoa, Spain), a model extension was necessary in order to allow a better description of the pump curve, making the model more generic. Both cases showed good agreement between the model predictions and the measured data of energy consumption. The model is thus far more accurate compared with other approaches to quantify energy consumption, paving the way towards ‘global’ process optimization and new, improved control strategies for energy reduction at WWTPs.
MONTEIRO, M.A.G.; MONACHESI, M.G. Eficiência energética em sistemas de bombeamento. Rio de Janeiro, Eletrobras; Procel, 2005. 86 p. (Manual Prático)
MONTEIRO, M.A.G.; MONACHESI, M.G. Eficiência energética em sistemas de bombeamento. Rio de Janeiro, Eletrobras; Procel, 2005. 86 p. (Manual Prático)
Please note that this text is in Portuguese
Water and wastewater energy best practice guidebook
Water and wastewater energy best practice guidebook.