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Applying Criteria Equations in Studying the Energy Efficiency of Pump Systems

Author

Listed:
  • Gencho Popov

    (Department of Heat, Hydraulics and Environmental Engineering, University of Ruse “Angel Kanchev”, 8 Studentska Street, 7017 Ruse, Bulgaria)

  • Stanislaw Legutko

    (Faculty of Mechanical Engineering, Poznan University of Technology, 3 Piotrowo Street, 60-965 Poznan, Poland)

  • Kliment Klimentov

    (Department of Heat, Hydraulics and Environmental Engineering, University of Ruse “Angel Kanchev”, 8 Studentska Street, 7017 Ruse, Bulgaria)

  • Boris Kostov

    (Department of Heat, Hydraulics and Environmental Engineering, University of Ruse “Angel Kanchev”, 8 Studentska Street, 7017 Ruse, Bulgaria)

Abstract

This paper presents a method for evaluating the energy efficiency of pump systems used to transport fluids .It is mainly scientifically applied and engineering-applied in nature and aims to propose a new approach (method) to researchers in their study of the energy efficiency of such systems. By applying the well-known scientific method of Dimensional Analysis (Buckingham π-theorem), dimensionless complexes (π-criterions and their relevant equations, which are original (innovative) and are offered for the first time in the scientific literature), used in accomplishing an energy assessment and analysis of such systems, are obtained. The criterion ∏ 1 = e v /ρgD represents specific energy consumption in kWh/m 3 for a given pipe system with an exemplary diameter D. The criterion ∏ 2 = Q/[n(H p − H st )D 2 ] represents a generalized parameter which is characterized by the selected method of flow rate (Q) regulation for a pump system with given static head H st —by changing the speed of rotation (VFD, Variable Frequency Drive), by throttling, leading to an increase of the system hydraulic losses h v = (H p H st ) or by diverting a part of the flow, known as “by-pass”, where the pump operates with the required system head H p , but ensures higher flow rates, i.e., Q p > Q s . The flow rate criterion ∏ 3 = Q/(νD) characterizes the flow rate for a pipe system with an exemplary diameter D, used to transport a liquid with known viscosity ν. An example for applying these dimensionless complexes in accomplishing a quantitative evaluation of the energy efficiency of a given pump system is presented. A method for determining the main parameters forming these criterions, used to describe the different methods of flow rate regulation, has been developed. To demonstrate the application of this method, newly proposed by the authors, including obtaining the relevant criteria equations of the type ∏ 1 = f(∏ 2 , ∏ 3 ), a certain pump system was used. This original approach for studying pump systems used to transport fluids can be used both to accomplish an energy analysis of such systems as well as to solve for optimization or other engineering problems.

Suggested Citation

  • Gencho Popov & Stanislaw Legutko & Kliment Klimentov & Boris Kostov, 2021. "Applying Criteria Equations in Studying the Energy Efficiency of Pump Systems," Energies, MDPI, vol. 14(17), pages 1-13, August.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:17:p:5256-:d:621317
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    References listed on IDEAS

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    1. Natalia Naval & Jose M. Yusta, 2020. "Water-Energy Management for Demand Charges and Energy Cost Optimization of a Pumping Stations System under a Renewable Virtual Power Plant Model," Energies, MDPI, vol. 13(11), pages 1-21, June.
    2. Xiaoli Feng & Baoyun Qiu & Yongxing Wang, 2020. "Optimizing Parallel Pumping Station Operations in an Open-Channel Water Transfer System Using an Efficient Hybrid Algorithm," Energies, MDPI, vol. 13(18), pages 1-19, September.
    3. Jedrzej Bylka & Tomasz Mroz, 2019. "A Review of Energy Assessment Methodology for Water Supply Systems," Energies, MDPI, vol. 12(23), pages 1-55, December.
    4. Luigi Cimorelli & Carmine Covelli & Bruno Molino & Domenico Pianese, 2020. "Optimal Regulation of Pumping Station in Water Distribution Networks Using Constant and Variable Speed Pumps: A Technical and Economical Comparison," Energies, MDPI, vol. 13(10), pages 1-15, May.
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