A Study on Multistage Centrifugal Pump Performance Characteristics for Variable Speed Drive System

Rakibuzzaman,; Suh, Sang Hyun; Kim, Kyung-Wuk; Kim, Hyung‐Ho; Cho, Min Tae; Yoon, In Sik

doi:10.1016/j.proeng.2015.05.109

Cited by 21 publications

(10 citation statements)

References 6 publications

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“…The measured and calculated hydraulic parameters at BEP are given in Table 3. These performance characteristic curves were compared with the characteristic curves obtained by Rakibuzzaman et al (2015), Xia et al (2015) and Fiaschi et al (2005). From the comparison it was concluded that the head vs discharge characteristic of the pump was stable under variable speed operation.…”

Section: Figure 3 Layout Of Experimental Setupmentioning

confidence: 96%

Pressure fluctuation study in the stages of a multistage pump at best efficiency points under various operating speeds

Arumugam

Kumaraswamy

2021

JER is an international, peer-reviewed journal that publishes f

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The interaction between the rotor and stator is a major source of high amplitude pressure fluctuation and flow-induced vibration in multistage centrifugal pumps. The pressure fluctuation is detrimental to the reliable operation of pumps. The sensitivity of vibration is severe if the number of stages is more. In the present experimental study, a vertical multistage centrifugal submersible pump is used to measure the pressure fluctuation level at Best Efficiency Points (BEP) and to determine the influence of stage and operating speed on pressure fluctuation. For this purpose, pressure fluctuation signals were captured at the delivery side of the pump at BEP at various speed settings. The characteristics of pressure fluctuation at BEP at various operating speeds were studied with the help of spectra, i.e., in the frequency domain. The amplitude variation of pressure fluctuation with harmonics of vane passing frequency at stages were studied. Results have indicated that variation of pressure fluctuation with stage and speed exhibited a non-linear variation. In addition, such a pressure fluctuation study will be helpful to modify the design to obtain a uniform pressure distribution in the stages of a multistage pump.

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Section: Figure 3 Layout Of Experimental Setupmentioning

confidence: 96%

Pressure fluctuation study in the stages of a multistage pump at best efficiency points under various operating speeds

Arumugam

Kumaraswamy

2021

JER is an international, peer-reviewed journal that publishes f

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“…With the increase of rotational speed, a decrease in efficiency can be observed, which results from the linear increase in shear stress along with the increase of fluid velocity. In contrast, in the case of centrifugal pumps the hydraulic efficiency decreases with rotational speed [34][35][36]. For the inclination angle β ≈ 20 • , the efficiencies are comparable to those of the Archimedean screw [3,4].…”

Section: Efficiency and Torquementioning

confidence: 99%

Hydraulic Capacity and Efficiency of a Low-Speed Nonpressurized Coil Pump

Matz

Błażejewski

Nawrot

et al. 2019

Water

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The paper presents the results of an investigation on hydraulics of a low-speed coil pump for transport of liquids. One of the pump's advantages is its wide range of potential inclination angles for its rotating shaft, from the horizontal to an almost vertical position. A simplified hydraulic model was developed based on kinematic and geometrical considerations to determine the pump capacity. The model was verified under laboratory conditions using a low-speed coil pump composed of transparent PVC tube (15 mm outer diameter) wound around a cylindrical drum (104 mm external diameter; 550 mm long). Laboratory tests were performed for three angles of inclination of the axis of rotation (20 • , 40 • , and 60 • ) and four rotational speeds (10, 20, 30, and 40 rpm). The results of the tests showed satisfactory agreement with the hydraulic model predictions. Energetic efficiency was estimated on the base of electric power measurements and difference of water levels in the two arms of rotating transparent torus, partly filled with water. The hydraulic efficiency of the coil pump is increasing with decreasing rotational speed.

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“…Currently, flow detection and energy savings method are the hot topic for BPSs [1]; however, few studies have investigated only on energy savings in BPSs both experimentally and numerically [2][3][4][5][6]. Rakibuzzaman et al (2015Rakibuzzaman et al ( , 2017 recently investigated on energy saving rates for a multistage, centrifugal pump with variable speed drive through numerically and experimentally [7], [8]. In order to improve the reliability of the booster pump, the optimum operation algorithm and flow rate information for the individual pumps of the booster pump system is required.…”

Section: Introductionmentioning

confidence: 99%

A study on the individual pump flow estimation processor for optimal operation

Rakibuzzaman

Suh

Yoon³

et al. 2021

E3S Web Conf.

Self Cite

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The booster pump is an energy-saving system that controls the number of turns of the pump and optimal operation by installing an inverter to control the discharge pressure of the pump in accordance with the flow rate. The development of an optimum operation algorithm and flow rate information for the individual pumps without flow sensors is critical of a smart booster pump system. The objectives of this study was to investigate the algorithm based flow detection method without use of a flow sensor for each pump. Therefore, it was developed an algorithm-based flow rate detection method of individual pumps without the use of a flow sensor that has not been studied in the conventional booster pump system. The software-based processor development and experimental verification for detecting the flow rate of individual pumps were confirmed. The ensemble error was within 2%. For optimal operation, the result of examining the accumulated flow rate for the sequential operation method and the optimum operation method. The flow measurement accuracy of the system was confirmed by experiment and the development of a booster pump system without a flow sensor was found effective.

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A Study on Multistage Centrifugal Pump Performance Characteristics for Variable Speed Drive System

Cited by 21 publications

References 6 publications

Pressure fluctuation study in the stages of a multistage pump at best efficiency points under various operating speeds

Pressure fluctuation study in the stages of a multistage pump at best efficiency points under various operating speeds

Hydraulic Capacity and Efficiency of a Low-Speed Nonpressurized Coil Pump

A study on the individual pump flow estimation processor for optimal operation

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