Abstract
The article aims to find a solution for the energy efficiency improvements in variable speed-controlled parallel pumping systems with lesser initial data and without additional flow metering and start-up measurements. This paper introduces a new control strategy for variable speed-controlled parallel pumps based on flow rate estimation and pump operation analysis utilizing variable speed drives. The energy-saving potential of the new control strategy is studied with simulations and laboratory measurements. The energy consumption of the parallel pumps using the new control strategy is compared with the traditional rotational speed control strategy of parallel pumps. The benefit of the new control strategy is the opportunity to operate variable speed-controlled parallel pumps in a region which suggests improved energy efficiency and lower risk of mechanical failure of the controlled pumps compared with traditional control. The article concludes by discussing the implications of the findings for different applications and varying system conditions.
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References
Ahonen, T. (2011). Monitoring of centrifugal pump operation by a frequency converter. PhD Thesis. Lappeenranta University of Technology, Finland.
Ahonen, T., et al. (2010). Estimation of pump operational state with model-based methods. Energy Conversion and Management, 51(6), 1319–1325.
Ahonen, T., Ahola, J., Viholainen, J., & Tolvanen, J. (2011). Energy-efficiency-based recommendable operating region of a VSD centrifugal pump. In: International Conference on Energy Efficiency in Motor Driven Systems (EEMODS). Alexandria, Virginia, US.
Ahonen, T., Tamminen, J., Ahola, J., & Kestilä, J. (2012). Frequency-converter-based hybrid estimation method for the centrifugal pump operational state. IEEE Transactions on Industrial Electronics, 59(12), 4803–4809.
ANSI/HI (1997). 9.6.3: Centrifugal and vertical pumps for allowable operating region.
Aranto, N., Ahonen, T., & Viholainen, J. (2009). Energy Audits: University Approach with ABB. In: International Conference on Energy Efficiency in Motor Driven Systems (EEMODS). Nantes.
Barringer, P. (2003). A life cycle cost summary. In: International Conference of Maintenance Societies (ICOMS). Perth, Australia.
Bernier, M. and Bourret, B. (1999). Pumping Energy and Variable Frequency Drives. ASHRAE Journal, 37, 37–40.
Binder, A. (2008). Potentials for energy saving with modern drive technology—a survey. In: International Symposium on Power Electronics, Electrical Drives, Automation and Motion. Ischia, Italy.
Bortoni, E. A., Almeida, R. A., & Viana, A. N. C. (2008). Optimization of parallel variable-speed-driven centrifugal pumps operation. Energy Efficiency, 1, 167–173.
Carlson, R. (2000). The correct method of calculating energy savings to justify adjustable-frequency drives on pumps. IEEE Transactions on Industry Applications, 36(6), 275–283. ISSN: 0093–9994.
de Almeida, A., Fonseca, P., Falkner, H., & Bertoldi, P. (2003). Market transformation of energy-efficient motor technologies in the EU. Energy Policy, 31(6), 563–575.
de Almeida, A. T., Ferreira, F. J. T. E., & Both, D. (2005). Technical and economical considerations to improve the penetration of variable speed drives for electric motor systems. IEEE Transactions on Industry Applications, 41(1), 188–199.
Europump and Hydraulic Institute. (2004). Variable speed pumping: A guide to successful applications (1st ed.). Oxford: Elsevier. ISBN 1-85617-449-2.
Ferreira, F. J. T. E., Fong, C., & de Almeida, T. (2011). Eco-analysis of variable-speed drives for flow regulation in pumping systems. IEEE Transactions on Industrial Electronics, 58(6), 2117–2125. ISSN 0278–0046.
Hammo, S., & Viholainen, J. (2006). Providing flow measurement in parallel pumping systems from variable speed drives. World Pumps, 2006(483).
Hammond, P. W. (1984). A universal controller for parallel pumps with variable-frequency drives. IEEE Transactions on Industry Applications, IA-20(1), 203–208. ISSN: 0093–9994.
Hooper, W. (1999). Advantages of parallel pumping. Plant Engineering, 31, 4–6.
Hovstadius, G., Tutterow, V., & Bossel, S. (2005). Getting it right, applying a systems approach to variable speed pumping. In: Energy Efficiency in Motor Driven Systems (EEMODS), pp. 304–314. Heidelberg, Germany
Izquierdo, M.D.Z., Jimenez, J.J.S., and del Sol, A.M. (2008). Matlab software to determine the saving in parallel pumps optimal operation systems, by using variable speed. In: IEEE Energy 2030 Conference, 2008. ENERGY 2008. Atlanta, GA, USA.
Jones, G. M. (2006). Pumping station design. Amsterdam: Elsevier. ISBN 978-0-7506-7544-4.
Karassik, I. J., & McGuire, T. (1998). Centrifugal pumps (2nd ed.). New York: Chapman & Hall.
Karassik, I., Messina, J., Cooper, P., & Heald, C. (2001). Centrifugal pump handbook (3rd ed.). New York: McGraw-Hill.
Kaya, D., et al. (2008). Energy efficiency in pumps. Energy Conversion and Management, 2008(49), 1662–1673.
Kini, P.G., Bansal, R.C., & Aithal, R.S. (2008). Performance analysis of centrifugal pumps subjected to voltage variation and unbalance. IEEE Transactions on Industrial Electronics, 55(2), 562–569.
Martins, G. and Lima, E. (2010). Improving reliability in a high static head system through VFD application. In: International Pump Users Symposium. Houston.
Pannatier, Y., et al. (2010). Investigation of control strategies for variable-speed pump-turbine units by using a simplified model of the converters. IEEE Transactions on Industrial Electronics, 57(9), 3039–3049. ISSN: 0278–0046.
Pemberton, M. (2003). Intelligent variable speed pumping. Plant Engineering, 57(12), 28–30.
Pemberton, M., & Bachmann, J. (2010). Pump systems performance impacts multiple bottom lines. Engineering & Mining Journal, 211(3), 56–59.
Rossmann, W. C., & Ellis, R. G. (1998). Retrofit of 22 pipeline pumping stations with 3000-hp motors and variable-frequency drives. IEEE Transactions on Industry Applications, 34(1), 178–186. ISSN: 0093–9994.
Shiels, S. (1997). The risk of parallel operation. World Pumps, 1997(364).
Sulzer. (1989). Centrifugal pump handbook. New York: Elsevier. ISBN 1-85166-442-4.
Viholainen, J., et al. (2009a). Energy efficiency in variable speed drive (VSD) controlled parallel pumping. In: International Conference on Energy Efficiency in Motor Driven Systems (EEMODS). Nantes.
Viholainen, J., Tolvanen, J., & Vakkilainen, E. (2009). VSD—control in simulated systems. World Pumps, 2009(512).
Volk, M. (2005). Pump characteristics and applications. Boca Raton: Taylor & Francis Group. ISBN 0-8247-2755-x.
White, F. M. (2003). Fluid mechanics. New York: McGraw-Hill. ISBN 0-07-119911-x.
Yang, Z., & Borsting, H. (2010). Energy efficient control of a boosting system with multiple variable-speed pumps in parallel. In: 49th IEEE Conference on Decision and Control (CDC), 2010. Atlanta, GA, USA.
Zhang, H., Xia, X., & Zhang, J. (2012). Optimal sizing and operation of pumping systems to achieve energy efficiency and load shifting. Electric Power Systems Research, 86, 41–50.
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Viholainen, J., Tamminen, J., Ahonen, T. et al. Energy-efficient control strategy for variable speed-driven parallel pumping systems. Energy Efficiency 6, 495–509 (2013). https://doi.org/10.1007/s12053-012-9188-0
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DOI: https://doi.org/10.1007/s12053-012-9188-0