scholarly journals Study on custom centrifugal pump performance in supplying food based high viscos liquid

2021 ◽  
Vol 5 (1) ◽  
pp. 80-88
Author(s):  
Nur Hanna Khairul Anuar ◽  
Mohd Nizar Mhd Razali ◽  
Mohamad Rusydi Mohamad Yasin ◽  
Musfirah Abdul Hadi ◽  
Abdul Nasir Abd. Ghaffar
Keyword(s):  
Centrifugal Pump ◽  
Variable Frequency ◽  
Pump Efficiency ◽  
Shaft Speed ◽  
Variable Frequency Drive ◽  
Viscous Liquids ◽  
Pump Performance ◽  
Dynamic Head ◽  
Shaft Power ◽  
Pump Shaft

Viscosity is one of the factors affecting the performance of the centrifugal pump. A centrifugal pump is a device that used driven motor called impeller to move fluid by rotational energy. This thesis is about the analysis of the performance of the centrifugal pump when transferring viscous liquids. For this project, the objective is to design and fabricate a device that can pump liquid with various viscosity using centrifugal pump. The liquids used in the experiment are comprised of a mixture of detergent and water with different ratio to alter the viscosity. The viscosity is being identified by the usage of Zahn Cup Method with the temperature kept constant at 26 °C throughout the experiment. The performance of the centrifugal pump is being investigated by four parameters which is the flowrate, Total Dynamic Head (TDH), power and efficiency. The performance of the centrifugal pump can be accessed by altering the pump shaft speed in order to get various reading for the flow rate. In order to alter the pump shaft speed, the usage of motor with Variable Frequency Drive (VFD) is implemented. The values for the flowrate and pump shaft power are measured by flowmeter and Variable Frequency Drive (VFD). The Total Dynamic Head (TDH), hydraulic power and pump efficiency is calculated based on the reading of the flowmeter and pump shaft power displayed at Variable Frequency Drive (VFD). At the end of this project, the pump performance while pumping different viscous liquids at different flowrates is being identified.

Effect of Surfactant Additives on Centrifugal Pump Performance

2003 ◽  
Author(s):  
Satoshi Ogata ◽  
Keizo Watanabe ◽  
Asano Kimura
Keyword(s):  
Centrifugal Pump ◽  
Surfactant Concentration ◽  
Tap Water ◽  
Maximum Flow ◽  
Pump Efficiency ◽  
Optimal Temperature ◽  
Pump Performance ◽  
Surfactant Solutions ◽  
Pump Head ◽  
Shaft Power

Performance of a centrifugal pump when handling surfactant solutions was measured experimentally. The effects of the concentration and temperature of surfactant solutions on pump performance were investigated. It was clarified that the pump efficiency with surfactant solutions was higher than that with tap water, and increased with an increase of surfactant concentration. The value of maximum flow rate of the pump also increased. The total pump head increased with an increase in the surfactant concentration, however, the shaft power decreased with a decrease in the rotational speed of the impeller. The pump efficiency is dependent on the surfactant temperature, and there is an optimal temperature which maximizes the efficiency.

KARAKTERISTIK POMPA SENTRIFUGAL ALIRAN CAMPUR DENGAN VARIABLE FREQUENCY DRIVE

ROTASI ◽  
2013 ◽  
Vol 15 (3) ◽  
pp. 30
Author(s):  
Sri Utami Handayani
Keyword(s):  
Centrifugal Pump ◽  
Maximum Speed ◽  
Variable Frequency ◽  
Centrifugal Pumps ◽  
Variable Frequency Drive ◽  
Speed Reduction ◽  
Pump Speed ◽  
Dynamic Head ◽  
Reduce Energy Consumption ◽  
Static Head

In an industry that uses large centrifugal pumps continuously, pump speed setting can reduce energy consumption significantly. By changing the speed of a centrifugal pump,  capacity, head, and pump power required will change according to pump affinity laws. Speed of a centrifugal pump can be changed  by variable frequency drive . This study aimed to investigate the characteristics of mixed flow centrifugal pumps with variable frequency drive. The results showed that 10% of maximum speed reduction can decrease power consumtion until 50%, while the increase in the efficiency is maximum 7.2%. The power reduction is different for different speed reduction. In a dynamic head dominated system the efficiency will remain constant during speed reduction while in static head dominated system will change.

Numerical Investigation of Viscous Flow in Three Centrifugal Pumps

2012 ◽  
Author(s):  
Carlos Luis Moreno ◽  
Alejandro Fuenmayor ◽  
Gilberto Núñez ◽  
Jesús De Andrade ◽  
Ricardo Noguera ◽  
...  
Keyword(s):  
Fluid Dynamics ◽  
Viscous Flow ◽  
Centrifugal Pump ◽  
Fluid Viscosity ◽  
Centrifugal Pumps ◽  
Impeller Blade ◽  
Pump Turbine ◽  
Viscous Liquids ◽  
Pump Performance ◽  
Radial Forces

Centrifugal pump performance is affected when pumping viscous liquids, requiring a larger power input than the same pump handling water. In applications of chemical, civil, environmental, and mechanical engineering that involve centrifugal pumps, it is a challenge to accurately estimate and even more of a challenge to improve their performance when handling viscous liquids. When accurate performance data is needed, difficult experiments must be conducted with the operating viscous flow. The extension of the applicability of numerical techniques for solving fluid dynamics (CFD) permits the consideration of these tools as a definite possibility for predicting the performance of centrifugal pumps with viscous flows. The purpose of this study is to perform a 3D-CFD steady-state simulation of three different configurations of centrifugal pumps. The first is an impeller-diffuser pump (ns = 19) taken from an ESP model. The second is a Francis Pump-Turbine (ns = 28). Finally, the third configuration possesses an impeller and volute (ns = 32). The objective is to characterize and evaluate their performances with four different fluids from 1 to 420 cSt. These are: water at 25°C, SAE10 and SAE30 oils, and Fuel Oil Medium (FOM). For water flow conditions, the numerical results were compared with experimental data, and found to be consistent with global performance parameters. With regard to the higher viscosity fluids, the CFD calculation was compared with those obtained through the standard empirical method (ANSI/HI9.6.7). This resulted in good agreement between the performance results. The commercial software ANSYS-CFX was used for the CFD calculations. The resulting pump performance curve (head, hydraulic efficiency and power output) is consistent with that expected by theory. In general, as the viscosity of fluids increases, the hydraulic energy losses increase. Of the three pumps, slip factor for SAE30 oil was larger for all volumetric flows since it features the best guidance of the flow in the impeller blade passage. For the ns32 pump and the pump-turbine ns28, the volute losses rose from water to FOM, just like the impeller hydraulic losses. For these two turbo machines, the impeller losses were larger than volute losses. For the pumps with volute, the effects of fluid viscosity on the radial forces were evaluated. It was found that the radial forces decrease when the viscosity increases. This paper attempts to contribute to a better understanding of fluid dynamics within centrifugal pump impellers handling viscous fluids, and intends to shed more light on the approaches that performance prediction models should follow in the future.

Performance Characteristics of a Shear Pump Operating in High Viscous Solutions

2003 ◽  
Author(s):  
Katsumi Chiba ◽  
Yukio Ito ◽  
Kazunori Kobayashi ◽  
Atsushi Kawamorita
Keyword(s):  
Centrifugal Pump ◽  
Viscosity Solutions ◽  
Flow Rate ◽  
Tap Water ◽  
Pump Efficiency ◽  
Medical Supplies ◽  
High Shock ◽  
Total Head ◽  
Shaft Power ◽  
Viscous Solutions

In many manufacture fields, such as foods, medical supplies, cosmetics, lubricants and paints of present in used, a Shear pump successively takes advantage of such cavitation effects as a large amount of cavitation bubbles and the associated impulsive high shock pressures, to the mixing, to the stirring and to the emulsion. In this study, to estimate the behavior of the cavitation effects in the shear pump, we precisely evaluate the performance. Although the performance of the shear pump, that is the total head Hp, the shaft power Ps, the pump efficiency η — the flow rate Q curves, is very similar to those of the centrifugal pump tested in tap water, they are much different from that in higher viscosity solutions of 500 cP.

Effect of Particle Parameters on Erosion Wear and Performance of Screw Centrifugal Pump

2018 ◽  
Author(s):  
Zhengjing Shen ◽  
Wuli Chu
Keyword(s):  
Centrifugal Pump ◽  
Shape Factor ◽  
Erosion Rate ◽  
Reduction Rate ◽  
Pump Efficiency ◽  
Erosion Wear ◽  
Pump Performance ◽  
Performance Reduction ◽  
Particle Parameters ◽  
And Performance

Sediment erosion is recognized as a serious engineering problem in slurry handling such as screw centrifugal pump, which has wide efficiency region and non-plugging performance. In the present study, the screw centrifugal pump was simulated based on the Euler-Lagrange method. The Mclaury model was adopted for the erosion prediction of flow passage components. By analyzing the correlation factor functions contained in the erosion model and performing some preliminary research with a simplified model, particle velocity, particle shape factor and particle concentration were selected as the influencing factors to analysis the quantitative relationship among particle parameters, erosion wear and performance of screw centrifugal pump. The results show that the erosion of volute casing is higher than impeller, and the erosion rate of suction side is higher than pressure side. The particles velocity is positively correlated with erosion wear and pump performance reduction rate. While the increase of particles shape factor shows the opposite trend. Erosion rate is found to be increases sharply and then slowly when particles concentration increases, because of the adhesion effect of sand particles in the volute casing inhibits the total erosion wear. The increase of erosion rate promoted the reduction rate of pump performance, and the pump efficiency decreased more significantly when the erosion rate increased to a certain extent. The results of this study are of great significance for further optimization of hydraulic design and structural design for screw centrifugal pump.

Effect of Vibrations on the Performance of a Centrifugal Pump-Impeller When Using a Variable Frequency Drive

2016 ◽  
Author(s):  
G. Lara-Rodriguez ◽  
O. Begovich ◽  
J. L. Naredo
Keyword(s):  
Centrifugal Pump ◽  
Incidence Angle ◽  
Operating Conditions ◽  
Rapid Decline ◽  
Variable Frequency ◽  
Liquefied Petroleum Gas ◽  
Or Efficiency ◽  
Pump Impeller ◽  
Variable Frequency Drive ◽  
Partial Load

This paper deals with turbomachinery, such as pumps or turbines, which are very sensitive to changes in fluid speed over the contours of the blades when the volumetric flow is varied. These changes modify the fluid incidence angle, causing a rapid decline in pump performance. Our research focuses on an analysis of the performance or efficiency of a centrifugal pump with a variable frequency drive, where losses in efficiency are caused by turbulence generating harmful vibrations in the installation. The methodology consists of measuring the magnitude of the vibrations. The data obtained are compared to the performance reached when the change in velocity has been produced with the regulation of the volumetric flow to a partial load of the pump. This suggests an analysis to attempt to resolve the issue of density variation that occurs when pumping liquefied petroleum gas (LPG) under regular operating conditions.

scholarly journals Experimental studies into the dependences of the axial lead coolant circulation pump performance on the pump straightening device parameters

2019 ◽  
Vol 5 (3) ◽  
pp. 237-240
Author(s):  
Aleksander V. Beznosov ◽  
Aleksander V. Lvov ◽  
Pavel A. Bokov ◽  
Tatyana A. Bokova ◽  
Nikita S. Lukichev
Keyword(s):  
Experimental Studies ◽  
Operating Conditions ◽  
Shaft Speed ◽  
Inlet Flow ◽  
Flow Angle ◽  
Pump Performance ◽  
Lead Coolant ◽  
Axial Pump ◽  
Circulation Circuit ◽  
Pump Shaft

The paper presents the results of experimental studies into the dependences of the axial pump performance (delivery rate, head, efficiency) in lead coolant on the parameters of the straightening device (SD) installed downstream of the impeller (the SD inlet flow angle and the number of the SD blades with a variable impeller speed change). The studies were performed as applied to the operating conditions of small and medium plants with lead cooled fast neutron reactors with horizontal steam generators (BRS GPG). The designs of such plants are being matured at Nizhny Novgorod State Technical University (NNSTU). The experiments were conducted on the FT-4 NGTU test bench at the lead coolant temperatures in a range of 440 to 500 °C. The number of the test blades was five and eight, and the SD inlet flow angle was 22, 24, 28, and 32°. The tests were also performed without an SD (with the SD dismantled). The shaft speed of the NSO-01 NGTU pump, with changeable SDs installed into its rotating assembly, was varied in a range of 600 to 1100 rev/min with a step of 100 rev/min. The SD sleeve diameter was 82 mm, the SD blade diameter and height were 213 mm and 80 mm respectively, and the maximum lead coolant flow rate during the studies was up to ~ 1650 t/h. The NSO-01 NGTU pump performance was determined with four changeable straightening devices and with no SD, the pump shaft speed being 600 to 1100 rev/min, as the circulation circuit hydraulic resistance changed owing to the movement of the wedge in the valve installed in it. The tests were performed with the impeller designed and supplied by NNSTU (D = 213 mm, dsl = 82 mm, the blade number is four, and the blade angle is 28°). The obtained results are recommended for use to design axial heavy liquid metal coolant pumps.

Effect of Surfactant Additives on Centrifugal Pump Performance

2005 ◽  
Vol 128 (4) ◽  
pp. 794-798 ◽  
Author(s):  
Satoshi Ogata ◽  
Asano Kimura ◽  
Keizo Watanabe
Keyword(s):  
Centrifugal Pump ◽  
Energy Savings ◽  
Tap Water ◽  
Maximum Flow ◽  
Pipeline System ◽  
Pump Efficiency ◽  
Rotating Speed ◽  
Surfactant Solutions ◽  
Pump Head ◽  
Shaft Power

Performance of a centrifugal pump when handling surfactant solutions was measured experimentally. It was clarified that the pump efficiency with surfactant solutions was higher than that with tap water and increased with an increase in surfactant concentration. The value of maximum flow rate also increased. The total pump head increased with an increase in concentration, and the shaft power decreased with a decrease in the impeller rotating speed. There was an optimal temperature, which maximizes the efficiency. By combining the data for the piping section and for the pump efficiency, it is possible to accurately predict the energy savings of the pumping power in the pipeline system.

Experimental Performance Evaluation of a Centrifugal Pump With Different Impeller Vane Geometries

2014 ◽  
Author(s):  
Susanta K. Das
Keyword(s):  
Centrifugal Pump ◽  
Computer Control ◽  
Operating Conditions ◽  
Design Parameters ◽  
Physical Parameters ◽  
Pump Efficiency ◽  
Centrifugal Pumps ◽  
Pump Performance ◽  
Pump Speed ◽  
Geometry Effects

Centrifugal pumps vane geometry plays an important role in pump’s overall performance. Thus, to know the impeller vane geometry effects on the performance of a centrifugal pump are essential from pump’s design point of view. In this study, an experimental investigation is carried out to judge the impeller vane geometry effects on the performance of a centrifugal pump. The performance of three different impeller vane geometries is evaluated in this investigation. To acquire pump performance and characteristics curves, inlet and outlet valves were manually adjusted and the pump’s rpm were varied remotely through computer control. The pressure data were obtained via installed flow rotameter for different flow rates with constant pump speed – 1800 rpm. Experimental data were used to calculate different physical parameters, such as the pump head, water horsepower — the power added to the fluid, power input to the pump–brake horse power, and pump efficiency for each of impeller vane geometries. The pump’s performance curves and the system curves were then plotted for each of the vane geometries. The results show that the pump performance as well as efficiency varies significantly for each of the impeller vane geometries. The results help to understand how to determine appropriate operating conditions and design parameters for different impeller vane geometries for obtaining optimized pump performance.

scholarly journals PENGUJIAN EKSPERIMENTAL DAN SIMULASI ANSYS PERFORMANSI POMPA SENTRIFUGAL RANGKAIAN SERI DAN PARALEL

2018 ◽  
Vol 20 (2) ◽  
pp. 29-35
Author(s):  
Adam Hafizar Pohan
Keyword(s):  
Centrifugal Pump ◽  
Performance Test ◽  
Pump Efficiency ◽  
Centrifugal Pumps ◽  
Pump Performance ◽  
Ansys Simulation ◽  
In Series ◽  
Series Configuration ◽  
Valve Opening ◽  
Parallel Configuration

This study was conducted to identify the performance of centrifugal pump series configuration and parallel configuration experimentally and Ansys simulation. In the previous study, the performance of centrifugal pumps was calculated by varying the valve opening. In this study researchers varied motor rotation of 1000 rpm, 1200 rpm, 1400 rpm, 1600 rpm and 1800 rpm with open valve 100%. The results show that series configuration has higher head value than parallel configuration. While the parallel configuration has a higher capacity value than the series configuration. The highest pump efficiency for this pump performance test is in series configuration of 1800 rpm is 83.4% for experimental and 85% for simulation. While the lowest pump efficiency is in parallel configuration pumps of 1800 rpm with an efficiency 14.1% for experimental and 15.5% for simulation.

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