Estimation of the Efficiency for Variable Speed Pumps in EPANET Compared with Experimental Data

Georgescu, Andrei-Mugur; Cosoiu, Costin Ioan; Perju, Sorin; Georgescu, Sanda-Carmen; Hasegan, Liviu; Anton, Attila

doi:10.1016/j.proeng.2014.11.466

Cited by 41 publications

(18 citation statements)

References 5 publications

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“…The free-water surface adopts the steel cover theorem to use the outflow and uses the symmetrical boundary condition. The export condition is free flowing; the fluid and the wall have no slip [28][29][30][31][32]. The pump station forebay grid map is shown in Figure 11(a).…”

Section: Grid Division and Sensitivity Verificationmentioning

confidence: 99%

Study on the Rectification of Forebay in Pumping Station

Song

Pang

Shi

et al. 2018

Mathematical Problems in Engineering

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The forebay of pumping stations is an important hydraulic structure that connects the channel with the inlet channel. Actual test observations and theoretical studies have shown that poor precursors produce backflow, vortex, and water flow disturbances in the forebay water. In this paper, taking a lateral inlet pump station as an example, we study the nonmeasures and five rectification measures—“Y” type diversion pier, “T” shaped diversion pier, narrow bottom hole, high and wide bottom, and diversion wall—through adopting the method of numerical simulation and model test. For the numerical simulation, the corresponding three-dimensional model is established by UG solid modeling software, and then the computational fluid is simulated numerically with CFX. Based on the analysis and comparison of the results during the test of numerical simulation and model test, the stability of the rectification measures is considered after taking into consideration the results of the uniformity test of the velocity distribution of the surface layer, the bottom layer, and the front section of each scheme. The proposed scheme 3 (“T” diversion pier) is regarded as the pumping station flow control measures.

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Section: Grid Division and Sensitivity Verificationmentioning

confidence: 99%

Study on the Rectification of Forebay in Pumping Station

Song

Pang

Shi

et al. 2018

Mathematical Problems in Engineering

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“…Because EPANET 2.0 power calculation for variable speed pumps are not correct [19,20], power consumption is calculated within MS Excel using the affinity laws and the pump efficiency curves for nominal speed (100%), as shown in Figure 2. For a given set of relative pump speed values, EPANET calculates flow and the corresponding specific energy demand used for pumping is then calculated for each pump within MS Excel using Equation 7, where w P,i is the specific energy demand needed for pumping and η i is the efficiency for a submersible well pump i.…”

Section: Hydraulic Modeling Of Groundwater Abstraction and Transportmentioning

confidence: 99%

Energy Efficient Operation of Variable Speed Submersible Pumps: Simulation of a Ground Water Well Field

Sperlich

Pfeiffer

Burgschweiger

et al. 2018

Water

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Due to their lower energy consumption, permanent magnet synchronous motor (PMSM) submersible pumps have been introduced in ground water well field operation. Besides direct savings of energy, the introduction of PMSM pumps together with the required variable frequency converters offers new operational scenarios to meet the seasonally varying water demand. In this work, potential energy savings of variable speed submersible pumps were investigated. A ground water well field consisting of 13 wells and their transport pipes was modeled in the hydraulic modeling software EPANET 2.0. Using MS visual basic for applications, EPANET was coupled with MS Excel and a genetic algorithm to identify the most energy efficient combination of pump speeds. For the simulated well field, the total specific energy demand required for pumping was significantly lower in partial load operation as compared to nominal pump speed operation. For low and moderate flow scenarios, energy savings in the range of 20% compared to nominal speed operation can be achieved. These findings were confirmed by a monitoring campaign in the well field. Combining hydraulic simulation and optimization using genetic algorithms, the best efficiency scenario for operation of ground water well fields can be found.

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“…The relations that govern pump operation at different rotational speeds are usually derived together with those that govern pump operation with different impeller diameters by the use of similitude theory, and are called affinity laws (Georgescu et al, 2014) as shown in Eqs 1 and 2:…”

Section: Pump Operation At Variable Speedsmentioning

confidence: 99%

Impact of variable speed pumps on water quality in distribution systems

Darweesh

2018

WSA

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Water quality has become a prominent issue in the study of water distribution networks. Variable speed pumps (VSPs) can control and improve the performance of water distribution systems. However, they may have effects on the water quality. The objective of this study was to investigate the impact of VSPs on water quality. The EPANET water quality simulator was applied for modelling water age and chlorine residual in a distribution network. In addition, intrusion of an active contaminant and analysis of leakage effects on residual chlorine concentration were performed through extended period simulations. Results indicate that VSPs may have negative impacts on water quality, including increased water age during low consumption times, and reduced disinfectant residuals at peak hours. In addition, the average rate of chlorine decay for fixed speed pumps (57%) is higher than that for VSPs (54%) when a conservative contaminant (sewage water) is considered.

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Estimation of the Efficiency for Variable Speed Pumps in EPANET Compared with Experimental Data

Cited by 41 publications

References 5 publications

Study on the Rectification of Forebay in Pumping Station

Study on the Rectification of Forebay in Pumping Station

Energy Efficient Operation of Variable Speed Submersible Pumps: Simulation of a Ground Water Well Field

Impact of variable speed pumps on water quality in distribution systems

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