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Journal articles on the topic 'Pump performance'
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1
Mrinal, KR, and Abdus Samad. "Performance prediction of kinetic and screw pumps delivering slurry." Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy 232, no. 7 (2018): 898–911. http://dx.doi.org/10.1177/0957650918760161.
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Transporting slurry is a difficult task and industries use a kinetic or centrifugal pump or a screw or progressive cavity pump to deliver it. On the other hand, approximation models can help predicting performance and avoiding the expensive experiments of pumps with slurries. In this work, bentonite-based slurries were prepared and pumped by a centrifugal pump and a progressive cavity pump. The experimental facilities were developed in-house and artificial neural network-based approximation models were developed to predict performances. The approximation models say that it can eliminate the expensive testing to draw performance curve a pump. The relative merits of the pumps show that the progressive cavity pump has a better capability to handle the slurries or high viscosity fluids.
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Ali Hikmet Akhmadov, Ali Hikmet Akhmadov, and Teymur Aghazadeh Teymur Aghazadeh. "POLYMER ADDITIVES IN THE COOLANT OF WATER-RING VACUUM PUMPS." ETM - Equipment, Technologies, Materials 11, no. 03 (2022): 39–44. http://dx.doi.org/10.36962/etm11032022-39.
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Practice shows that vacuum water ring pumps are widely used in industry. Such pumps are used in almost all areas of the oil industry, metallurgy, chemical industry, mechanical engineering, food industry, agriculture, pulp and paper industry, gas and many other areas. Taking into account all the above-mentioned areas of application, the question arises about increasing the service life and reliability of LCVs (liquid water ring pumps). This article provides a fundamental study of the theory of operation and performance of a liquid ring pump. Keywords: vacuum pump, theoretical model, coolant, foaming, cavitation, actual performance.
3
Haque, M. A., M. D. Hussain, and M. A. Zaman. "On Farm Performance of Manual Pumps." Journal of Agricultural Machinery and Bioresources Engineering 3, no. 1 & 2 (1996): 19–26. http://dx.doi.org/10.61361/jambe.v.i12.58.
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This paper describes the on farm performances of three manually operated pumps widely used in Bangladesh namely, twin treadle pump, rower pump and No. 6 hand pump. Discharges from the treadle pump, rower pump and No. 6 hand pump at a head of 2.5 m were 0.66, 0.50 and 0.41 l/s respectively. Power input to the Rower pump and No. 6 Hand pump were 10% and 40% higher, respectively than that of the treadle pump at a head of 3.5 m. Treadle pump had the highest efficiency of 45% while the rower pump and the No. 6 hand pump had 38% and 25% efficiency, respectively. BCR values were 2.69, 1.83 and 1.17 respectively for the treadle pump, rower pump and No. 6 hand pump. The costs of lifting per m³ water were Tk. 6.46, Tk. 8.55 and Tk. 9.85 for the treadle, rower and No. 6 hand pump respectively. The overall performance of the twin treadle pump was better than rower and No. 6 hand pump up to a suction lift of 6 m. The No. 6 hand pump is not suitable for irrigation purpose because of its very low discharge and high power requirement.
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Ganushchak, Y., W. van Marken Lichtenbelt, T. van der Nagel, and D. S. de Jong. "Hydrodynamic performance and heat generation by centrifugal pumps." Perfusion 21, no. 6 (2006): 373–79. http://dx.doi.org/10.1177/0267659106074003.
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For over a century, centrifugal pumps (CP) have been used in various applications, from large industrial pumps to flow pumps for aquariums. However, the use of CP as blood pumps has a rather short history. Consequently, the hydraulic performance data for a blood CP are limited. The aim of our investigation was to study the hydraulic performance and the heat generation of three commercially available CP: Bio-Medicus Bio-Pump BP80 (Medtronic), Rotaflow (Jostra Medizintechnik), and DeltaStreamTM DP2 (MEDOS Medizintechnik AQ). The study was performed using a circuit primed with a water-glycerin mixture with a dynamic viscosity of 0.00272 pa/s. Pressure-flow curves were obtained by a stepwise stagnation of the pump outlet or inlet. The temperature changes were observed using ThermaCAM SC2000 (Flir Systems). The pumps’ performance in close to clinical conditions (‘operating region’) was analysed in this report. The ‘operating region’ in the case of the BP80 is positioned around the pressure-flow curve at a pump speed of 3000 rpm. In the case of the Rotaflow, the ‘operating region’ was between the pump pressure-flow curves at a speed of 3000 and 4000 rpm, and the DP2 was found between 7000 and 8000 rpm. The standard deviation of mean pressure through the pump was used to characterise the stability of the pump. In experiments with outlet stagnation, the BP80 demonstrated high negative association between flow and pressure variability (r=-0.68, p <0.001). In experiments with the DP2, this association was positive (r=-0.68, pB <0.001). All pumps demonstrated significantly higher variability of pressure in experiments with inlet stagnation in comparison to the experiments with outlet stagnation. The rise of relative temperature in the inlet of a pump was closely related to the flow rate. The heating of fluid was more pronounced in the ‘zero-flow’ mode, especially in experiments with inlet stagnation. In summary, (1) the ‘zero-flow’ regime, which is described in the manuals of some commercially-available pumps, is the use of the pump outside the allowable operating region. It is potentially dangerous and should, therefore, never be used in clinical settings. (2) Using centrifugal pumps for kinetic-assisted venous return can only be performed safely when the negative pressure at the inlet of the pump is monitored continuously. The maximum allowable negative pressure has to be defined for each type of pump, and must be based on pump performance.
5
Sarsam, A.Gaade* M.M.Awad A.-R. Dohina W.M.El Awady. "THE PERFORMANCE OF HYBRID CENTRIFUGAL–JET PUMP." INTERNATIONAL JOURNAL OF ENGINEERING SCIENCES & RESEARCH TECHNOLOGY 5, no. 11 (2016): 484–90. https://doi.org/10.5281/zenodo.168433.
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Pumps are considered the heart of any project includes fluid transportation or increasing of its pressure. For a long run, the piping pressure losses increases and the pump efficiency decreases which effect the system requirements of either discharge pressure of flow rate. A hybrid centrifugal-jet pump system is proposed in order to enhance the centrifugal pump performance to achieve the system requirements. The performance of the centrifugal and the proposed hybrid pumps are performed at a speed 2900 rpm for different ratios of centrifugal and jet pumps flow rates. The effect of the throat ratio (D/L) variation of the jet pump is also investigated at different ratios of D/L=0.33, 0.4, 0.5, 0.66. The obtained results show that the propose system increases the discharge head depending on the ratio of the jet and the centrifugal pumps flow rates. It found that the maximum increasing of the discharge head is about 43%. At the maximum flow rate ratio for all jet pump throat ratios. This means the variation of the jet pump throat ratio D/L has no observed effect on the hybrid system performance. Also the hybrid system map performance is also obtained at different throat ratio.
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Gavade, Ramesh S., and Suresh M. Sawant. "Study of Mechanical Performance Affecting Factors in Split Casing Pump." International Journal of Engineering and Advanced Technology 10, no. 2 (2020): 31–37. http://dx.doi.org/10.35940/ijeat.b1992.1210220.
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The need for better performance and higher comfort continually drive search for new features. In today’s applications, pumps are expected to continue continuously for a long time. So “operational reliability” is a key factor. The comprifugal pump is a fluid-carrying machine, with centrifugal energy produced by rotating air. Pumps are used for conveying fluids. Rotating power usually comes from an electric car, which is turned by the engine and the engine. There is a great demand for centrifugal pumps on the market. The construction is relatively inexpensive, durable and easy, and its high speed makes it possible to connect the pump directly to an unmatched car. The centrifugal pump provides a constant flow of fluid, and can be easily blown without causing damage to the pump. Pump reliability problems address a large amount of repair repairs and the cost of loss of access to chemical plants, refineries, and many electrical appliances. This paper describes the most common causes of pump failure, and how they can be avoided in most cases by using the appropriate types of analysis and procedure during the pump selection process. Specifically, key issues include where the pump will operate next to the best efficient point (BEP). Proper pump selection and installation avoid misalignment. This paper explains the various reasons for the failure of Split break pumps.
7
Ramesh., S. Gavade, and M. Sawant Suresh. "Study of Mechanical Performance Affecting Factors in Split Casing Pump." International Journal of Engineering and Advanced Technology (IJEAT) 10, no. 2 (2020): 31–37. https://doi.org/10.35940/ijeat.B1992.1210220.
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The need for better performance and higher comfort continually drive search for new features. In today’s applications, pumps are expected to continue continuously for a long time. So “operational reliability” is a key factor. The comprifugal pump is a fluid-carrying machine, with centrifugal energy produced by rotating air. Pumps are used for conveying fluids. Rotating power usually comes from an electric car, which is turned by the engine and the engine. There is a great demand for centrifugal pumps on the market. The construction is relatively inexpensive, durable and easy, and its high speed makes it possible to connect the pump directly to an unmatched car. The centrifugal pump provides a constant flow of fluid, and can be easily blown without causing damage to the pump. Pump reliability problems address a large amount of repair repairs and the cost of loss of access to chemical plants, refineries, and many electrical appliances. This paper describes the most common causes of pump failure, and how they can be avoided in most cases by using the appropriate types of analysis and procedure during the pump selection process. Specifically, key issues include where the pump will operate next to the best efficient point (BEP). Proper pump selection and installation avoid misalignment. This paper explains the various reasons for the failure of Split break pumps.
8
Ward, Peter R. B., William G. Dunford, and David L. Pulfrey. "Performance of small progressive cavity pumps with solar power." Canadian Journal of Civil Engineering 14, no. 2 (1987): 284–87. http://dx.doi.org/10.1139/l87-041.
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A small progressive cavity pump, rated at about 900 W, has been assembled and tested as part of a photovoltaic-cell-powered water pumping system. Torque-speed relationships for the progressive cavity pump, not readily available in published engineering journals, were measured and are presented. The pump was extremely well suited to lifting groundwater for small (domestic) supplies with solar power because it was capable of producing the full design head over a very wide range of speeds. In addition, the progressive cavity pump was robust, and unlike most other positive displacement pumps, would tolerate small concentrations of silt and sand in the water without damage. Very many of these pumps are already in use in parts of Africa and other developing areas, and excellent prospects exist for operating progressive cavity pumps with solar-energy-powered drives. Key words: pump, solar power, groundwater, water, water supply, solar, well, hydrology, hydraulic.
9
Meakhail, T., and S. O. Park. "An improved theory for regenerative pump performance." Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy 219, no. 3 (2005): 213–22. http://dx.doi.org/10.1243/095765005x7565.
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Owing to their low specific speed, regenerative pumps allow high heads with small flow rates and have performance curves with very stable features. This kind of pump is also smaller and simpler to construct than the other equivalent volumetric pumps, although it has fairly low efficiency. Over the past few years, regenerative pumps have been subject to more interest in various industrial applications. Previous mathematical models do not describe the flow characteristics very well as they are based on simplified assumptions. An improved model is proposed in this paper for the pump performance. The model can handle one inlet angle and two exit angles for the impeller blades and it can be used for the design of twisted blades that would increase the pump head and efficiency. A new feature of the pump characteristics based on the proposed model is discussed. It is shown that the proposed model yield results that are in good agreements with the experimental results. The new model also shows that the side-blade exit angle has a major effect on the performance of regenerative pump, which has not been accounted for in the previous theory.
10
Jilani, Aisyah, and Akhtar Razali. "Variable Speed Pump Performance Characteristics for Domestic Application." MATEC Web of Conferences 225 (2018): 02005. http://dx.doi.org/10.1051/matecconf/201822502005.
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Generally, water pumps work at a fixed speed. Structural resonance in fixed speed can cause vibration. The reason that most single speed pumps utilize an excessive amount of electricity is that they are overused and oversized. Therefore, this research is embarked to study the characteristic of a pressure-controlled variable speed pump, develop the variable speed pressure controlled pump and analyse the pump performance. A technique is proposed to change the constant speed pump to variable speed pump by adding Variable Frequency Drive (VFD) and microcontroller. A simple test rig is designed and fabricated represented of water distribution for domestic use. The method was then experimentally validated to verify the pump performance and energy used. Data for water flow rate, water pressure, power output and pump speed were analysed. Since the speed can be lowered until 29.27% which according to the water volume demands, therefore the power consumption was found decreased and the lowest power is 0.014 kW. Maximum water discharge capability is 32.38 lpm. It is found that, a variable speed water pump able to save energy up to 97% and led to electricity bill saving and increase the life span of pipes and joints through less hydraulic pressure built-up.
11
Huang, Si, Jing He, Xueqian Wang, and Guangqi Qiu. "Theoretical Model for the Performance of Liquid Ring Pump Based on the Actual Operating Cycle." International Journal of Rotating Machinery 2017 (2017): 1–9. http://dx.doi.org/10.1155/2017/3617321.
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Liquid ring pump is widely applied in many industry fields due to the advantages of isothermal compression process, simple structure, and liquid-sealing. Based on the actual operating cycle of “suction-compression-discharge-expansion,” a universal theoretical model for performance of liquid ring pump was established in this study, to solve the problem that the theoretical models deviated from the actual performance in operating cycle. With the major geometric parameters and operating conditions of a liquid ring pump, the performance parameters such as the actual capacity for suction and discharge, shaft power, and global efficiency can be conveniently predicted by the proposed theoretical model, without the limitation of empiric range, performance data, or the detailed 3D geometry of pumps. The proposed theoretical model was verified by experimental performances of liquid ring pumps and could provide a feasible tool for the application of liquid ring pump.
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Sun, Dahan, Jiang Qin, and Zhongyan Liu. "Performance and Economic Analysis of Two Types of High-Temperature Heat Pump Based on New Refrigerants." Applied Sciences 14, no. 17 (2024): 7735. http://dx.doi.org/10.3390/app14177735.
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This paper proposes, for the first time, the research concept of comparing energy and economy between transcritical cycle high-temperature heat pumps and subcritical cycle high-temperature heat pumps with new refrigerants. Experiments and simulations are conducted to compare the system performance and economy of two heat pumps, and the effects of different factors on the performance of two heat pumps are analyzed. The results show that R744/R1234yf (90/10) and R515-1 are the preferred refrigerants for transcritical cycle heat pumps and subcritical cycle heat pumps, respectively. The COP of the R744/R1234yf (90/10) transcritical heat pump is generally higher than that of the R515B-1 subcritical heat pump, and compared to the R515B-1 subcritical heat pump, the cost recovery period of the R744/R1234yf (90/10) transcritical heat pump is about 9–15 years. Therefore, it is recommended that users who use heat pumps for a long time choose transcritical cycle heat pumps. Meanwhile, with the change of evaporation temperature, the system COP of the R515B-1 subcritical heat pump and R744/R1234yf (90/10) transcritical heat pump increases by 61.11% and 65.91%, respectively. In addition, the optimal charge amount for the R515B-1 subcritical heat pump is 81.8% of that of the R744/R1234yf (90/10) transcritical heat pump.
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Rakibuzzaman, Md, Sang-Ho Suh, Hyung-Woon Roh, Kyung Hee Song, Kwang Chul Song, and Ling Zhou. "Hydraulic Performance Optimization of a Submersible Drainage Pump." Computation 12, no. 1 (2024): 12. http://dx.doi.org/10.3390/computation12010012.
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Small submersible drainage pumps are used to discharge leaking water and rainwater in buildings. In an emergency (e.g., heavy rain or accident), advance monitoring of the flow rate is essential to enable optimal operation, considering the point where the pump operates abnormally when the water level is increased rapidly. Moreover, pump performance optimization is crucial for energy-saving policy. Therefore, it is necessary to meet the challenges of submersible pump systems, including sustainability and pump efficiency. The final goal of this study was to develop an energy-saving and highly efficient submersible drainage pump capable of performing efficiently in emergencies. In particular, this paper targeted the hydraulic performance improvement of a submersible drainage pump model. Prior to the development of driving-mode-related technology capable of emergency response, a way to improve the performance characteristics of the existing submersible drainage pump was found. Disassembling of the current pump followed by reverse engineering was performed instead of designing a new pump. Numerical simulation was performed to analyze the flow characteristics and pump efficiency. An experiment was carried out to obtain the performance, and it was validated with numerical results. The results reveal that changing the cross-sectional shape of the impeller reduced the flow separation and enhanced velocity and pressure distributions. Also, it reduced the power and increased efficiency. The results also show that the pump’s efficiency was increased to 5.56% at a discharge rate of 0.17 m3/min, and overall average efficiency was increased to 6.53%. It was concluded that the submersible pump design method is suitable for the numerical designing of an optimized pump’s impeller and casing. This paper provides insight on the design optimization of pumps.
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Liu, Bin, Lin Chai, Aiqiang Chen, Fuhui Tang, Khellil Sefiane, and Georges E. I. Achkar. "Effects of vapor injection modes on the heating performance of heat pumps." European Physical Journal Applied Physics 86, no. 3 (2019): 30902. http://dx.doi.org/10.1051/epjap/2019190126.
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Heat pumps are widely investigated for their versatile use in a wide range of applications. In this study, three types of heat pumps were experimentally compared. These heat pumps include an one-stage without injection vapor heat pump, an one-stage injection vapor heat hump and a two-stage injection vapor heat pump with an economizer. The results showed that the heating capacity of all three variants of heat pumps decreases with the decrease of the evaporation temperature. However, the attenuation ratio of the heating capacity is found to be different from one pump to another. On the one hand, the largest attenuation rate is found to be 68.84% for evaporating temperatures ranging from −1 °C to −23 °C and for the case of one-stage heat pump. On the other hand, the smallest attenuation rate is found to be 31% for the two-stage injection vapor heat pump in the same temperature range. It is worth noting that the heating efficiency is improved by the amount of vapor injection, nevertheless, there is a maximum value due to the limitations of the economizer. The two-stage injection vapor heat pump can exhibit an enhanced heating efficiency of 127% compared to the one-stage without injection vapor heat pump and 13% compared to the one-stage injection vapor heat pump for an evaporating temperature of −23 °C.
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Moifatswane, M. Prince, Nkosinathi Madushele, and Noor A. Ahmed. "Improving the Performance of an Axial Flow Pump: An Overview." Advances in Science and Technology 107 (June 28, 2021): 15–25. http://dx.doi.org/10.4028/www.scientific.net/ast.107.15.
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Thus far, axial flow pumps remain a significant hydrodynamic unit. These pumps have common applications for various systems that require a high flow rate and a lower head. They tend to be less efficient and consume excessive power when operating at low flow conditions. Most of the studies focus on improving the hydraulic performance of these pumps based on the best efficiency point (BEP) flow conditions. This approach is mostly based on the assumption that the pump will always operate at BEP. However, this is not always the case, because the operational condition of the pump may require an adjustment to meet certain system demands. Hence, it is necessary to emphasize the need to improve the hydraulic performance of these pumps for multiple flow conditions. This means that in addition to BEP, the lowest, and the highest operational conditions need to be considered when improving the pump performance. Also, it is important to review the phenomenon of cavitation in every design optimization investigation, given its significance to pump performance and some misrepresentation which are sometimes associated with its assessment. Therefore. the main contribution of this article is to briefly discuss the successful and unsuccessful design optimization methods of an axial flow pump. Furthermore, it highlights the significance of improving the pump performance at multiple flow conditions and also to incorporate the analysis of using CFD methods to analyze the results of cavitation performance in every pump performance improvement investigation.
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Siddique, Omer, and Hanzla Jalil. "Exploring the Structure and Performance of Petroleum Retail Outlets in Pakistan." Pakistan Development Review 57, no. 2 (2018): 223–47. http://dx.doi.org/10.30541/v57i2pp.223-247.
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The petroleum retail industry is one of the least researched industries in Pakistan due to, perhaps, unavailability of the relevant data. This paper aims to fill this gap. Specifically, the present paper examines the structure and performance of petrol pumps in Pakistan, using primary survey data. Analysis of the data reveals that operating a petrol pump is a profitable venture and both location and non-locational variables are important in contributing to the profitability of a petrol pump. The exploratory analysis shows that the petrol pumps in urban areas and those on highways have higher sales, indicating that the geographical location of a petrol pump is important in explaining a petrol pump’s performance. According to the regression results, as the size of a petrol pump increases, its profitability increases and there is a non-linear relation between the distance variable and profitability of a petrol pump. The non-linearity implies that there exists optimal distance between two petrol pumps that maximises profits. This optimal distance is shorter for urban and non-highway petrol pumps, compared with rural and highway petrol pumps. JEL Classification: D24, L81, R3 Keywords: Cost, Retail Business, Firm Location, Petrol Pumps
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Thanapandi, P., and R. Prasad. "A Quasi-Steady Performance Prediction Model for Dynamic Characteristics of a Volute Pump." Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy 208, no. 1 (1994): 47–58. http://dx.doi.org/10.1243/pime_proc_1994_208_008_02.
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A performance prediction model generally applicable for volute-type centrifugal pumps has been extended to predict the dynamic characteristics of a pump during its normal starting and stopping periods. Experiments have been conducted on a volute pump with different valve openings to study the dynamic behaviour of the pump during normal start-up and stopping, when a small length of discharge pipeline is connected to the discharge flange of the pump. Such experiments have also been conducted when the test pump was part of a hydraulic system, an experimental rig, where it is pumping against three similar pumps, known as supply pumps, connected in series, with the supply pumps kept idle or running. Instantaneous rotational speed, flowrate, and delivery and suction pressures of the pump were recorded and it was observed in all the tested cases that the change of pump behaviour during the transient period was quasi-steady, which validates the quasi-steady approach presented in this paper. The nature of variation of parameters during the transients has been discussed. The model-predicted dynamic head-capacity curves agree well with the experimental data for almost all the tested cases.
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Zhang, Qihua, Shun Kang, Zhiang Xie, Li Cao, Zhaoxu Yan, and Weidong Zhang. "Pulp pumping efficiency II – Designing of a pulp pump." Nordic Pulp & Paper Research Journal 36, no. 2 (2021): 265–75. http://dx.doi.org/10.1515/npprj-2021-2008.
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Abstract Based on the loss model of pulp pump set up in the I part of this research, an efficient designing method is proposed by taking account of the influences of head reduction by small blade number, leakage loss via tip clearance, and erosion-corrosion wears in pumps separately. Further, a two-stage optimal designing approach was proposed to tackle the oversized design. The pump designing was performed by coupling with a CFD-based optimization procedure. An efficiency increase of near 10 % was achieved on the pump model validated in laboratory. It was proved that performance could be improved by increasing the impeller blade width and enlarging the impeller blade outlet angle. It was further shown that the erosion-corrosion wear in pulp pump was relatively lighter when compared to particle-impingement wear in slurry and sewage pump. Adoption of composite material showed potential in energy-saving in the pumping system.
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Si, Qiaorui, Gérard Bois, Minquan Liao, Haoyang Zhang, Qianglei Cui, and Shouqi Yuan. "A Comparative Study on Centrifugal Pump Designs and Two-Phase Flow Characteristic under Inlet Gas Entrainment Conditions." Energies 13, no. 1 (2019): 65. http://dx.doi.org/10.3390/en13010065.
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Capability for handling entrained gas is an important design consideration for centrifugal pumps used in petroleum, chemistry, nuclear applications. An experimental evaluation on their two phase performance is presented for two centrifugal pumps working under air-water mixture fluid conditions. The geometries of the two pumps are designed for the same flow rate and shut off head coefficient with the same impeller rotational speed. Overal pump performance and unsteady pressure pulsation information are obtained at different rotational speeds combined with various inlet air void fractions (α0) up to pump stop condition. As seen from the test results, pump 2 is able to deliver up to 10% two-phase mixtures before pump shut-off, whereas pump 1 is limited to 8%. In order to understand the physics of this flow phenomenon, a full three-dimensional unsteady Reynolds Average Navier-Stokes (3D-URANS) calculation using the Euler–Euler inhomogeneous method are carried out to study the two phase flow characteristics of the model pump after corresponding experimental verification. The internal flow characteristics inside the impeller and volute are physically described using the obtained air distribution, velocity streamline, vortex pattern and pressure pulsation results under different flow rates and inlet void fractions. Pump performances would deteriorate during pumping two-phase mixture fluid compared with single flow conditions due to the phase separating effect. Some physical explanation about performance improvements on handing maximum acceptable inlet two phase void fractions capability of centrifugal pumps are given.
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Ansori, Faisal, and Edi Widodo. "Analysis on Centrifugal Pump Performance in Single, Serial, and Parallel." Journal of Energy, Mechanical, Material and Manufacturing Engineering 3, no. 2 (2018): 79. http://dx.doi.org/10.22219/jemmme.v3i2.6958.
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The pump is a tool to provide the mechanical energy to the liquid in the pump constant fluid density and large. In terms of mechanism, the pump is divided into three types, namely, rotary pumps, pump the shaft/piston and centrifugal pumps. The use of the pump are the most widely used either in the household or in the environment industry. In the centrifugal pumps, there are losses – losses among other head losses. To find the head losses among other data needs head on the pump, the pump and the discharge flow rate of the pump. Head is defined as energy per unit weight of the fluid. The head of the unit (H) meters or feet is fluid. In the pump, the head is measured by calculating the difference between the total pressure of the suction pipe and the pipe press, when measurement is done at the same height. For single full pump openings 0,00246 m³ \ s, valve openings ¾ 0,00210 and aperture of ½ 0,00177 m³ \ s can be concluded the discharge of water at the pump the larger the opening of the valve the greater the discharge of its water. Moreover, vice versa, if the opening of the valve is getting smaller then the water debit is getting smaller. For full opening valves 3,11 m / s, for openings ¾ 2,65 m / s and ½ 2,23 m / s open valve openings. For the flow, velocity can be concluded the greater the opening of the valve the flow velocity is smaller and vice versa the smaller the opening of the valve the greater the flow rate. single centrifugal pump full valve openings 0.409 kg / cm², the opening of the valve ¾ 0,209 kg / cm² and the opening of the valve ½ 00,069 kg / cm² can be concluded the smaller the opening of the opening valve the smaller the head as well, and the greater the open valve opening, the more big head also in the can.
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Lai, Huahuang, Haoshu Wang, Zhen Zhou, Rongsheng Zhu, and Yun Long. "Research on Cavitation Performance of Bidirectional Integrated Pump Gate." Energies 16, no. 19 (2023): 6784. http://dx.doi.org/10.3390/en16196784.
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A pump gate is a device that controls the flow of water. It can stop the flood when it comes, drain the ponding gathered in the city, and improve the water circulation of the city. Traditional pumping stations require a large land area, and their pump houses and gates need to be designed separately. Furthermore, the construction period of traditional pumping stations is lengthy, and the maintenance costs are high. It can no longer meet the needs of modern cities for water environment management. Therefore, it is imperative to design a new type of pump gate. The integrated pump gate introduced in this paper is an integrated construction of gates and pumps to achieve automatic control and bidirectional operation. The research mainly consists of three parts: design of pumping station, theoretical analysis, and numerical calculation. By studying the unstable flow inside the integrated pump, the characteristics and the degree of cavitation occurrence are predicted. This can provide a reference basis for the optimal design and stability operation of the integrated pump gate. To investigate cavitation in an integrated pump gate, numerical simulations were performed for multiple operating conditions using the SST turbulence model. Constant numerical simulations of cavitation through numerical calculation, the characteristic curves of the integrated pump gate under forward and reverse operation at different flow points were obtained, and flow field analysis was performed for the model pump at 1.0 Q. The location and degree of cavitation occurrence were predicted. In this study, a preliminary analysis was conducted to investigate the influence of cavitation on the internal flow characteristics of integrated gate pumps. The research collected data related to cavitation characteristics, streamline patterns, and blade pressures. Additionally, the study explored the characteristics of cavitation phenomena, laying the foundation for the optimization of the design of bidirectional operation in integrated sluice gate pumps for future practical engineering applications.
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Amaresh Sarkar and Madan K. Jha. "Performance Evaluation of an Indigenous Metallic Treadle Pump." Journal of Agricultural Engineering (India) 47, no. 2 (2024): 48–52. http://dx.doi.org/10.52151/jae2010472.1411.
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Treadle pumps are the most suitable and economical option to supply water for drinking and small-scale irrigation in developing countries. The performance evaluation of a treadle pump is usually done only by measuring discharge. Although few studies have considered operating forces and efficiency of the pump, the details about operating force measurement, input power, output power, mechanical efficiency of the pump and mechanical advantage of the paddles are absent. A scientific methodology is demonstrated for the performance evaluation of a commonly used metallic treadle pump manufactured in India, and to present pump performance data for benefit of the users. The analysis of the experimental data indicated that the metallic treadle pump was able to lift water up to 5 m static suction head. The maximum overall efficiency of the treadle pump was found to be 32.6% at a static suction head of 3.5 m. However, the volumetric efficiency of the pump ranged from 92.9 to 66.7% at static suction heads of 1 to 5 m.
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Zhou, Ling, Wei Dong Shi, Wei Gang Lu, and Hui Li. "Performance Predication and Axial Force Study on Deep-Well Centrifugal Pump." Applied Mechanics and Materials 130-134 (October 2011): 711–14. http://dx.doi.org/10.4028/www.scientific.net/amm.130-134.711.
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Axial force is one of the main factors which affect the pump safety and reliability during the operation of pumps, especially in multi-stage centrifugal pumps. 150QJ20 type deep-well centrifugal pump (DCP) is selected as an example to research the pump performance and axial force with the numerical simulation and experiment method. The numerical simulation results were compared with experimental measurements, and such result was analyzed. The results show that the change trend of the pump performance and axial force acquired by numerical and experiment is similar. At rated operating point, the error of axial force between the numerical simulation and experimental measurements is less than 3%. This confirmed the feasibility of predict the pump performance by numerical simulation method.
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Dong, Dianjin, Jing Jiang, and Dongmei Li. "Numerical Analysis of a Novel Rotating Piston Blood Pump Based on CFD." Journal of Physics: Conference Series 2610, no. 1 (2023): 012037. http://dx.doi.org/10.1088/1742-6596/2610/1/012037.
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Abstract Currently, centrifugal and roller pumps are primarily used as ECMO blood pumps, but their high pressure or high shear force may lead to complications such as hemolysis and platelet activation. Thus, a new blood pump structure was designed by improving the rotating piston pump and applying it to the blood pump. The blood pump flow field was simulated using CFD simulation software to ensure that this pump can produce pulsatile blood flow and guarantee good distribution of flow velocity, pressure, and shear stress in the blood pump. The hemolysis value of the pump was calculated using the Lagrangian particle tracking method. The research results demonstrate that this pump has excellent hemodynamic performance and that most of the shear stresses are less than 100 Pa, as well as a small hemolysis index. Furthermore, the pump combines the advantages of pulsatile and non-pulsatile pumps. This newly developed pump is expected to provide a new direction for ECMO blood pump development and provides important evidence for further optimization and performance evaluation of rotating piston blood pumps.
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Fajardo, Arthur, Charleen Grace Deniega, Fatima Joy Raytana, Marie Jehosa Reyes, Jerson Jose Menguito, and Yaminah Mochica Pinca. "Performance of Different Pumps and Pump Sets for Agricultural Applications Tested by the Agricultural Machinery Testing and Evaluation Center, Philippines." Philippine Journal of Agricultural and Biosystems Engineering 19, no. 2 (2023): 3–15. http://dx.doi.org/10.48196/019.02.2023.01.
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In the Philippines, different sizes and types of pump sets are utilized for shallow tubewells (STW) and low-lift pumps (LLP). Filipino farmers used STW and LLP as main or supplementary sources of irrigation. This study aimed to evaluate the performance of agricultural pumps and pump sets tested by the Agricultural Machinery Testing and Evaluation Center (AMTEC) from 1989 to 2022, based on Philippine Agricultural Engineering Standards (PAES) 115:2000. A total of 486 centrifugal pump sets and 341 bare pumps were used in the study. The selected sizes for both bare pump and pump set (engine-powered) include 50x50mm, 75x75mm, and 100x100mm. These were the common sizes and prime mover used for STWs and LLPs in the Philippines. The performance of the agricultural pumps was evaluated with equal weights using the: a) discharge-to-input power ratio, b) suction lift, c) maximum efficiency, and d) input speed. For all bare pump sizes, non-self-priming (52.99%, 61.05%, 62.21%, respectively) and discharge capacity (7.78lps, 15.78lps, 25.54lps, respectively) have higher pump efficiency than self-priming. All sizes of non-self-priming pumps are driven by diesel engines. Results showed that, generally, for pump sets system efficiency, in general: a) it is relatively higher for non-self-priming than self-priming (same with bare pump efficiency); b) relatively higher for diesel than gasoline engine driven; and c) relatively higher for water-cooled than air-cooled diesel engine. This study has also found that most of the evaluated bare pumps met the criteria of the performance evaluation scheme, including all of the 100x100mm non-self-priming units. On the other hand, most of the 100x100mm self-priming, close-coupled (17/25); 75x75m m self-priming, close-coupled (79/100); 50x50mm selfpriming, V-belt drive (6/6); and 50x50mm self-priming, close-coupled (101/109) pump sets did not meet the criteria of the evaluation scheme. Appropriate tools (i.e. statistical) or systems should be utilized to determine the performance parameters and corresponding performance values for the evaluation of the pumps and pump sets.
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Mevada, Shraddha A., and Amit Bhuptani. "Performance Enhancement in Submersible Pump Impellers: Design and Optimization Approaches." International Journal for Research in Applied Science and Engineering Technology 12, no. 5 (2024): 77–80. http://dx.doi.org/10.22214/ijraset.2024.61437.
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Abstract: Submersible pumps are essential components in various industries, including water supply, wastewater management, and oil extraction. Their efficiency and reliability are crucial for ensuring consistent fluid transport. At the core of submersible pumps lies the impeller, which directly influences pump performance. This paper examines advanced design and optimization approaches to enhance the performance of submersible pump impellers. By analyzing key factors such as blade geometry, material selection, and impeller design parameters, we explore methods to improve hydraulic performance, energy efficiency, and operational stability. Experimental validation confirms the effectiveness of these approaches in achieving superior pump efficiency and longevity. This study contributes to the advancement of submersible pump technology and sets a foundation for future research in the field.
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Qiu, Guang Qi, Si Huang, Lan Lan Zhu, Yu Chen, and Jing He. "Performance Monitoring Analysis of Liquid Ring Vacuum Pumps." Applied Mechanics and Materials 853 (September 2016): 463–67. http://dx.doi.org/10.4028/www.scientific.net/amm.853.463.
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Liquid ring vacuum pump which uses rotating liquid as piston to abstract and compress gas is a kind of rotating positive displacement pump. Its running state implies some fault informantion. To capture performance levels of liquid ring vacuum pump, a comprehensive performance monitoring system includes data acquisition, data reprocessing, data storage, abnormal judgment and fault alarm, performance displaying is developed in this paper. Hence, the performance levels of liquid ring vacuum pump can be observed anytime by the monitoring system, the maintenance cost can be reduced, pumps can be operated at the highest performance level as far as possible, the reliability and the maintainability of liquid ring vacuum pump can be effectively improved by this monitoring system.
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Zhou, Hua, and Wei Song. "Theoretical flowrate characteristics of the conjugated involute internal gear pump." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 227, no. 4 (2012): 730–43. http://dx.doi.org/10.1177/0954406212454390.
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The aim of this article is to study the theoretical flowrate characteristics of the conjugated involute internal gear pump. The conjugated involute internal gear pump has a different internal gear, the profile of which is completely conjugated to that of pinion, from the conventional involute internal gear pump. To describe briefly, the former pump is called ‘conjugated pump’ while the latter pump ‘conventional pump’. This structure makes the conjugated pump have smaller volumes of trapped fluid than the conventional pump, which indicates the conjugated pump has a better flowrate performance. Although there have been numerous investigations into gear pumps, none of them have dealt with the conjugated pumps yet. This article presents a systematic study on the theoretical flowrate characteristics of the conjugated pumps. It is expected to obtain some generalized conclusions to guide the design of internal gear pumps. Firstly, a double envelope concept is applied to derive the mathematical models of the conjugated involute internal gear couple. Next, mesh characteristics of the gear couple, which mainly decide the fluid delivery performance of the pumps, are analyzed. Finally, using a control volume approach, the theoretical flowrate characteristics of the pump under different design parameters of gears are investigated. Results show the conjugated pump has a better performance than the conventional one. To design a conjugated pump with good flowrate characteristics, it’s feasible to choose a proper shifting coefficient, a larger tooth number of the pinion, a smaller tooth number of the internal gear, a larger pressure angle and a larger fillet radius, under the condition that no tooth interference occurs.
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Hussain, Tarique, M. Udaya Kumar, Niranjan Sarangi, and M. Sivaramakrishna. "A Study on Effect of Operating Conditions on Gerotor Pump Performance." Defence Science Journal 72, no. 2 (2022): 146–50. http://dx.doi.org/10.14429/dsj.72.16668.
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One of the important accessories of the lubrication system of an aero-engine is the oil pump which consists of multiple pumps with tandem gerotor elements housed in a single casing. This paper presents the volumetric efficiency variation of a single-stage gerotor pump specially designed for aero-engine by conducting experiments at on and off-design conditions and comparing it with the CFD analysis. A Gerotor pump having fixed geometrical parameters designed based on a athematical 1D model using MatLab and AMESim is manufactured and tested. Performance evaluation of these pumps for pressure and temperature has been discussed in this paper. Commercial CFD code ANSYS-Fluent with a standard k- ε turbulence model has been used for performance evaluation of gerotor pump. Flow characteristics studies on the prototype pump indicate that simulation results closely matched the experimental data. The study concludes that the simulation method adopted is appropriate for predicting the performance of the gerotor pump and the contribution of outlet pressure to the pump volumetric efficiency is significant.
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Rifai, Moh Sahal, Nanang Ruhyat, and Arief Surachman. "Performance Analysis of Centrifugal Pumps Before and After Wear Ring Restoration." International Journal of Innovation in Mechanical Engineering and Advanced Materials 7, no. 1 (2025): 43. https://doi.org/10.22441/ijimeam.v7i1.30324.
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A pump is a mechanical device used to move fluids from a lower elevation to a higher one. In general, pumps are classified into two types: positive displacement pumps and non-positive displacement pumps. Centrifugal pumps fall into the latter category and operate by converting mechanical energy into kinetic energy to transport fluids. A centrifugal pump consists of several key components, including the casing, shaft, bearing, coupling, and impeller. In the case of closed impeller-type centrifugal pumps, wear rings (wearing components) are installed to provide a clearance between the impeller and the casing, preventing physical contact during operation. The size of this clearance significantly affects pump performance. Wear ring damage can result from mechanical wear, corrosion, cavitation, and fatigue, leading to performance losses such as reduced flow rate, lower pressure, and decreased efficiency. This research aims to analyze the effect of wear ring damage on the performance of a centrifugal pump by comparing operational data before and after repair of the wearing components. The performance parameters evaluated include pump head, pressure, hydraulic power, motor power, and overall efficiency. Data were collected through a structured procedure consisting of preparation, testing, measurement, and analysis. Prior to repair, the pump operated with a wear ring clearance of 1.2 mm, resulting in an average efficiency of 8.5% and a flow rate of 0.000646 m³/s. After the clearance was restored to 0.43 mm, the average efficiency increased to 15.5%, with a corresponding flow rate of 0.000932 m³/s. These results demonstrate that maintaining wear ring clearance within recommended standards significantly improves pump performance, highlighting the importance of regular maintenance and timely component repair.
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Ganushchak, Yuri M., Erik PJ Körver, and Jos G. Maessen. "Is there a “safe” suction pressure in the venous line of extracorporeal circulation system?" Perfusion 35, no. 6 (2020): 521–28. http://dx.doi.org/10.1177/0267659120936453.
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Successes of extracorporeal life support increased the use of centrifugal pumps. However, reports of hemolysis call for caution in using these pumps, especially in neonatology and in pediatric intensive care. Cavitation can be a cause of blood damage. The aim of our study was to obtain information about the cavitation conditions and to provide the safest operating range of centrifugal pumps. A series of tests were undertaken to determine the points at which pump performance decreases 3% and gas bubbles start to appear downstream of the pump. Two pumps were tested; pump R with a closed impeller and pump S with a semiopen impeller. The performance tests demonstrated that pump S has an optimal region narrower than pump R and it is shifted to the higher flows. When the pump performance started to decrease, the inlet pressure varies but close to −150 mmHg in the test with low gas content and higher than −100 mmHg in the tests with increased gas content. The same trend was observed at the points of development of massive gas emboli. Importantly, small packages of bubbles downstream of the pump were registered at relatively high inlet pressures. The gaseous cavitation in centrifugal pumps is a phenomenon that appears with decreasing inlet pump pressures. There are a few ways to increase inlet pump pressures: (1) positioning the pump as low as possible in relation to the patient; (2) selecting appropriate sized venous cannulas and their careful positioning; and (3) controlling patient’s volume status.
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Igwe, Johnson, Anders Brandt, Peter Schuster, and Chidiadi Mba. "Methodology for the thermodynamic optimization of steam turbine pump performance." Poljoprivredna tehnika 50, no. 1 (2025): 35–45. https://doi.org/10.5937/poljteh2501035i.
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Pumps are an integral part of steam-driven turbines since they are necessary to provide continuous kinetic energy to the working fluid and operate at considerably high pressures to meet boiler design conditions. Thermodynamic modeling and optimization from an energy viewpoint will establish the link between optimum operating conditions concerning boiler design. This was achieved through thermodynamic modeling and optimization of pump performance on a steam-driven turbine rated at 50 MW. Using developed energy models, a system performance simulation was made by systematically accounting for the variation in pump efficiency and overall turbine output. For the considered pumps, overall cycle thermal efficiency is slightly affected by the pump performance efficiency even at higher pressures. Increasing pump efficiencies has been shown to improve overall cycle efficiency comparatively. The system recorded 80 % pump efficiency, 640 K temperature at the WHRB, 35 bar pressure at the inlet to the turbine, and a steam mass flow rate of 50.6 kg/s, respectively. The system's thermal efficiency was 38.39 % finally. Furthermore, in cases where a tradeoff between cycle performance, efficiency, and cost of operation is required, these results will be helpful in the multi-objective optimization of similar systems in cost and thermal efficiency.
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O’Reilly, J. M., and P. F. Monaghan. "Wind Evaporator Heat Pumps—Part II: Thermal Performance Results." Journal of Energy Resources Technology 114, no. 4 (1992): 286–90. http://dx.doi.org/10.1115/1.2905955.
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Wind evaporators are alternative evaporators for air source heat pumps which rely on wind-driven or natural convection to move air across the heat transfer surfaces. A fully automatic, computer-controlled test facility which allows side-by-side testing of wind evaporator and conventional heat pumps and monitoring of weather conditions has been designed and built at University College Galway. The aim of this paper is to quantify the advantages of wind evaporators by comparing the performance of a wind evaporator heat pump with that of a conventional heat pump over an extended testing period and by examining the relationship between weather conditions and heat pump performance. In this paper, results are presented in the form of plots of coefficient of performance (COP), compressor power, evaporator and condenser heat transfers and climatic variables against time. In addition, a testing period coefficient of performance has been calculated for each heat pump. The results show that wind speed is the dominant climatic variable affecting wind evaporator heat pump performance, and that frost growth does not significantly reduce this performance. Even at extremely low wind speeds, the COP of the wind evaporator heat pump is not significantly affected. After over 460 hr of testing, the testing period COP of the wind evaporator heat pump shows a 16 percent increase over that of the conventional heat pump. (Refer to Nomenclature in Part I of this paper.)
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Ismailov, F. S., Sh P. Kazimov, and L. G. Hadjikerimova. "Innovative developments of sucker rod pumps to improve the performance of sand producing wells." SOCAR Proceedings, no. 4 (December 31, 2021): 80–86. http://dx.doi.org/10.5510/ogp20210400617.
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At the last stage of oil field development, the use of sucker rod pumps is widespread. Due to the drop in formation pressure and other reasons, the inflow of fluid into the well is reduced. The efficiency of the pumps decreases, the pump cylinder is not completely filled. To eliminate these obstacles, a new submersible pump has been developed with a intake valve, which opens and closes with the movement of the balance head. In flooded and sandy wells, sand destroys the working parts of the pump, especially the gap between the plunger-cylinder pair, as a result reduced productivity of the pump. The new pump design allows solving the problem by emulsifying part of the product. The operation of the pump is mathematically justified.
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Ali Hikmat Akhmadov, Mehman Omarov, Ali Hikmat Akhmadov, Mehman Omarov. "СOMPARATIVE STUDY OF CENTRIFUGAL PUMP". ETM - Equipment, Technologies, Materials 11, № 03 (2022): 70–74. http://dx.doi.org/10.36962/etm11032022-70.
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In this study, a centrifugal pump was analyzed to examine the effect of the use of inductors on its performance. Tests have been carried out to obtain optimal hydraulic performance before and after using the inductor. We used two types of inductors (axial inductors, screw inductors). For this, a test setup with a pumping system was specially designed to investigate the parameters under consideration. In this study, a simulation of the performance of a centrifugal pump in combination with inductors using CFD is presented for comparison with experimentally observed values. The model explores the effect of using inductors on pump head and flow. The results of the CFD model and experiment correlate well. In addition, the results assist pump decision makers in future developments in pump performance by ensuring that the pumps are in a safe and reliable operating condition. It can also be used for a wide variety of high head and flow pump applications. Keywords: hydraulics, Centrifugal pump, reliability, pumps, devices, system.
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Zhang, Zhonghua, Song Chen, Shuyun Wang, Junwu Kan, Jianming Wen, and Can Yang. "Performance evaluation and comparison of a serial–parallel hybrid multichamber piezoelectric pump." Journal of Intelligent Material Systems and Structures 29, no. 9 (2018): 1995–2007. http://dx.doi.org/10.1177/1045389x18758181.
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To improve the output capability of piezoelectric pumps, researchers have made an attempt to combine multiple single-chamber pumps either in series or in parallel. In this article, a serial–parallel hybrid multichamber piezoelectric pump is presented. The novel serial–parallel hybrid multichamber piezoelectric pump structure is characterized by the simultaneous occurrence of serial/parallel forms through a combination of synchronous and asynchronous modes of piezoelectric actuators. Moreover, the pump can be operated in multiple working modes to obtain the desired chamber volume and number through different serial–parallel configurations. The performance characteristics of the pump with various serial–parallel hybrid combinations were experimentally investigated and evaluated using a quintuple-chamber pump at 90 V with a frequency range of 60–400 Hz. Experimental results showed that the characteristics in terms of flow rate and backpressure changed significantly with different serial–parallel modes. Nevertheless, the backpressure presented very similar characteristics for the serial–parallel hybrid multichamber piezoelectric pump with the same number of in-phase parallel actuators. Meanwhile, the frequency-dependent flow rate characteristics were approximately similar for those pumps with symmetric serial–parallel combinations. It was found that the flow rate and backpressure mainly depended on the actuation frequency and serial–parallel modes, respectively. Compared with the quintuple-chamber pump with full out-of-phase actuators, the maximum powers of the serial–parallel hybrid multichamber piezoelectric pump with two, three, four, and five in-phase actuators were decreased by 21.1%, 51.4%, 77.7%, and 94.4%, respectively.
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Shui, Qingjiao, Ting Jiang, Binghui Pan, Tianxing Yang, and Wei Pan. "Numerical Research on Performance of High-Speed Partial Emission Pump." Shock and Vibration 2021 (January 18, 2021): 1–11. http://dx.doi.org/10.1155/2021/6697063.
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The high-speed partial emission pump is a small flow and high-head pump, which has been widely used. To study the main factors affecting the performance of high-speed partial emission pumps, numerical simulation methods were used to calculate the performance parameters of high-speed partial emission pumps with and without inducers, and the external characteristic parameters were verified through comparison test values. The results show that the head of the high-speed partial emission pump with inducer is nearly 15 m higher than that of the high-speed partial emission pump without inducer. Considering the influence of air in the high-speed partial emission pump on the working performance, the two-phase flow with different flow rates, different particle sizes, and different concentrations was calculated, and the different liquid phase distributions, liquid phase velocity vector diagrams, and external characteristic curve were compared. The results show that under the same flow condition, the gas-phase particle diameter has the most severe influence on the external characteristic.
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Di Giovine, G., L. Mariani, M. Di Bartolomeo, D. Di Battista, R. Cipollone, and A. Carminati. "Comparison on the energy absorbed of volumetric and centrifugal pumps for automotive engine cooling." Journal of Physics: Conference Series 2385, no. 1 (2022): 012075. http://dx.doi.org/10.1088/1742-6596/2385/1/012075.
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Abstract Engine thermal management can reduce significantly CO2 emissions in road vehicles without altering sensibly the engine layout. However, more efficient auxiliaries also participate to fuel consumption saving and, therefore, to CO2 emissions reduction. Typically, centrifugal cooling pumps are adopted as circulating devices, but their efficiency varies highly with rotational speed, wasting energy during real operation despite being optimized at the design point. Instead, volumetric pumps keep a high efficiency also far from it, enhancing the overall engine efficiency. In this paper, the performances of a screw-type volumetric pump have been compared with those of a centrifugal pump considering the same cooling circuit of a mid-size engine for passenger vehicles. Both pumps have been designed to satisfy the cooling flow rate required by the engine during a homologation cycle, while verifying their capability to cool the engine operating at maximum power. Once prototyped, the pumps performance maps have been measured, showing a high Best Efficiency Point for both cases. However, the screw pump has better performance in off-design conditions, being the centrifugal pump efficiency strictly dependent on its rotational speed which significantly changes during a real driving. The comparison of the two pumps has been done by reproducing the WLTC on a dynamic test bench. The rotational speed of the volumetric pump has been adjusted to deliver the same flow rate produced by the centrifugal pump as requested by the engine. Results show that the prototyped screw-type volumetric pump absorbs 21% less energy than the prototyped centrifugal pump, reducing CO2 emissions by 0.28 g/km.
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Jiang, Linglin, Houlin Liu, Yong Wang, Yanhong Mao, Runze Zhou, and Jianbin Gu. "Experimental Study on the Effect of Gas Volume Fraction on the Cavitation Performance of a Low-Specific-Speed Centrifugal Pump." Water 14, no. 5 (2022): 798. http://dx.doi.org/10.3390/w14050798.
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In order to study the cavitation performance of centrifugal pumps with low specific speeds under the condition of gas–liquid two-phase flow, a cavitation test rig for pumping gas–liquid two-phase flow was set up. The cavitation performance of the pump with a specific speed of 32 was studied. The variation of the head, pressure pulsation intensity, and vibration intensity with the cavitation allowance NPSHa (Net Positive Suction Head available) of the centrifugal pump were obtained at different inlet gas volume fraction (IGVF) conditions of 0, 1%, 2%, and 3%. The results show that the cavitation performance of a low-specific-speed centrifugal pump can be improved obviously in a certain liquid flow range when the IGVF is 1%, especially at a low liquid flow rate. When cavitation did not occur or the degree of cavitation was low, a lower IGVF can reduce pressure pulsation intensity at the pump outlet and the vibration intensity at the pump inlet under design flow rate and high flow rate conditions. Additionally, all performances of the low-specific-speed pump are more sensitive to gas when the liquid flow rate is low. The results can provide a reference for improving the cavitation performance of low-specific-speed pumps for transporting gas–liquid two-phase flow and single-phase liquids.
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Sun, Shilong, Peter W. Tse, and Y. L. Tse. "An Enhanced Factor Analysis of Performance Degradation Assessment on Slurry Pump Impellers." Shock and Vibration 2017 (2017): 1–13. http://dx.doi.org/10.1155/2017/1524840.
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Slurry pumps, such as oil sand pumps, are widely used in industry to convert electrical energy to slurry potential and kinetic energy. Because of adverse working conditions, slurry pump impellers are prone to suffer wear, which may result in slurry pump breakdowns. To prevent any unexpected breakdowns, slurry pump impeller performance degradation assessment should be immediately conducted to monitor the current health condition and to ensure the safety and reliability of slurry pumps. In this paper, to provide an alternative to the impeller health indicator, an enhanced factor analysis based impeller indicator (EFABII) is proposed. Firstly, a low-pass filter is employed to improve the signal to noise ratios of slurry pump vibration signals. Secondly, redundant statistical features are extracted from the filtered vibration signals. To reduce the redundancy of the statistic features, the enhanced factor analysis is performed to generate new statistical features. Moreover, the statistic features can be automatically grouped and developed a new indicator called EFABII. Data collected from industrial oil sand pumps are used to validate the effectiveness of the proposed method. The results show that the proposed method is able to track the current health condition of slurry pump impellers.
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Tando, Arjal, Alimuddin Linrung, Muhammad Syafrun, and Rustam Efendi. "Efek tinggi hisap terhadap kapasistas pompa sentrifugal." ARMATUR : Artikel Teknik Mesin & Manufaktur 5, no. 1 (2024): 122–27. http://dx.doi.org/10.24127/armatur.v5i1.4458.
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Centrifugal pumps are one type of pump commonly used in the industry, particularly in the processing and distribution of clean water. The characteristics of these pumps can be determined by varying the flow rate at a certain height. A study was conducted to investigate the effects of three different pump heights (3.5 m, 4.5 m, and 5.5 m) on the efficiency of a centrifugal pump using water at a temperature of 31℃. The results showed that the maximum overall efficiency was obtained at a height of 4.5 m with a value of 33.22% and a total head of 23.39 m. The pump height was found to have an impact on the pump capacity, with higher pump positions resulting in an increased occurrence of cavitation bubbles in the suction pipe, leading to a decrease in pump performance. Therefore, the placement of centrifugal pumps should be carefully considered, taking into account factors such as height and distance of the suction pipe, to minimize cavitation and achieve optimal pump performance.
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Zenfira Huseynli, Naiba Muradova, Zenfira Huseynli, Naiba Muradova. "IMPROVING THE PERFORMANCE INDICATOR OF CENTRIFUGAL PUMPS." ETM - Equipment, Technologies, Materials 19, no. 01 (2024): 05–14. http://dx.doi.org/10.36962/etm19012024-05.
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This article is devoted to the research and development of methods to improve the performance of centrifugal pumps. Centrifugal pumps are key elements in various industrial and technical systems, ensuring efficient transportation of liquids. This article reviews the operation of centrifugal pumps, shows the scheme of the pumping part of the centrifugal type equipment, the scheme of the cantilever type centrifugal pump and describes their main components. Further, the factors affecting pump performance, including fluid viscosity and operating conditions, are analyzed, and methods for improving performance are described in detail, including design optimization, the use of new materials and modern technologies, as well as speed control and monitoring of pump condition. The advantages and disadvantages of centrifugal pumps are noted, the concept of what the operation of this equipment is based on is given, and the fields of application of centrifugal pumps are considered. In order to improve the operation of pumps, the article includes a table showing the existing problems in the operation of the pumps described by the author, the correction of which will lead to positive results, namely, an increase in quantitative and qualitative performance indicators. Further, in the article, a color diagram is shown, which shows the share distribution, that is, the percentage of damage to the structural elements of centrifugal pumps. To improve the reliability and efficiency of operation of centrifugal pumps, the article discusses in detail two ways to solve this task. The first way to solve the problem is the development and manufacture of new, namely more advanced pumps in design, which most often requires significant financial costs, and the second way was noted the modernization of already functioning equipment, which allows you to reduce your own costs and thereby ensure the implementation of energy saving programs. Based on the analysis and the examples considered, it is concluded that an increase in the performance of centrifugal pumps can lead to a significant improvement in efficiency and cost reduction. Keywords: centrifugal pump, productivity, performance indicators, optimization, materials, control.
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Wasiran, Wasiran, Waluyo Djoko Yudisworo, and Endang Prihastuty. "Performance Testing of Centrifugal Pump Type with 3 Hp Power." Mestro: Jurnal Teknik Mesin dan Elektro 4, no. 02 (2022): 21–30. http://dx.doi.org/10.47685/mestro.v5i02.365.
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Pumps are fluid machines whose uses are very broad and important, ranging from industry to household needs. Selection of pump performance characteristics is very important and must be adjusted to the needs which include: discharge, head, power, and rotation. The performance characteristics of the pump are obtained through testing. In connection with the importance of information about pump performance characteristics, through this research activity efforts will be made to test centrifugal pumps using 3 hp of power. In this research, the data obtained from the direct test results will be entered, where the test is carried out at the Machine Performance Test Laboratory. In this test, the pump pressure data obtained from the gauge gradually with several valve openings, then the data is entered into the data table that has been prepared. The test was carried out to test the ability of the centrifugal pump test equipment using 3 HP power which was prepared as one of the laboratory pump test equipment for engine performance testing. In testing the centrifugal pump there are 3 variables that will be used to carry out the test, namely the first by using a tachometer which is useful for measuring shaft rotation, the second by using a Bordoun manometer which is useful for measuring fluid pressure, the third by using an orifice which functions to measure speed fluid.
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Kang, Y. H., H. H. Vu, and C. H. Hsu. "Factors Impacting on Performance of Lobe Pumps: A Numerical Evaluation." Journal of Mechanics 28, no. 2 (2012): 229–38. http://dx.doi.org/10.1017/jmech.2012.26.
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AbstractThe aim of current research is to investigate numerically the fluid dynamics of lobe pumps and typical factors which could impact on performance of the pump including profile of rotor surface, number of lobes, gap size between rotor and casing, and clearance between two rotors, etc. The circular and epicycloidal curves are used to generate profiles for rotor surface, while the complex flow phenomena inside the pump are simulated by dynamic mesh technique. With wide range of investigated speed from 1000 to 5000rpm, the study produces significant information on flow pattern, velocity and pressure fields. The advantage of epicycloidal pumps over circular ones has been demonstrated via characteristic curve which performs pressure head versus rotational speed. Meanwhile the analysis has proved that multilobes, three and four lobes, do not increase performance of the pump but provide more stable output and higher capacity compared with two-lobe pumps. The results confirm great impact of gap size between rotor and casing wall on the pump efficiency. Decrease of the gap from 1.25mm down to 0.5mm produces about 425% increasing of pressure head. In addition, it has been also proved that the clearance between two rotors could be varied from 0.12mm to 0.15mm without much effect on performance of the pump.
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Yu, Zheqin, Jianping Tan, and Shuai Wang. "Multi-parameter analysis of the effects on hydraulic performance and hemolysis of blood pump splitter blades." Advances in Mechanical Engineering 12, no. 5 (2020): 168781402092129. http://dx.doi.org/10.1177/1687814020921299.
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The splitter blade can effectively optimize pump performance, but there is still insufficient research in blood pumps that cover both hydraulic and hemolysis performance. Thus, the aim of this study was to investigate the effect of key factors related to splitter blade on the performance and flow field of axial flow blood pump. In this study, the number of splitter blades, the axial length, and the circumferential offset were chosen as three objects of study. An analysis of the flow field and performance of the pump by orthogonal array design using computational fluid mechanics was carried out. A set of hydraulic and particle image velocimetry experiments of the model pumps were performed. The result showed that the pump had greater hydraulic performance without sacrificing its hemolytic performance when it had two splitter blades, the axial length ratio was 0.6, and the circumferential offset was 15°. Based on these reference data, the splitter blade may contribute to greater hydraulic performance of the pump and cause no side effect on the velocity distribution of the flow field. This finding provides an effective method for the research, development, and application of structural improvement of the axial flow blood pump.
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Lavon, Haim, Avi Shupak, Dror Tal, et al. "Performance of Infusion Pumps during Hyperbaric Conditions." Anesthesiology 96, no. 4 (2002): 849–54. http://dx.doi.org/10.1097/00000542-200204000-00011.
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Background Many hyperbaric facilities use infusion pumps inside the chamber. It is therefore important to ensure that this equipment will perform accurately during hyperbaric conditions. The authors tested the function and accuracy of the Imed 965 and Infutec 520 volumetric infusion pumps, the Easy-pump MZ-257 peristaltic infusion pump, and the Graseby 3100 syringe pump. Methods The authors calculated the deviations of infused volumes at low and high rates (12-18 and 60-100 ml/h) on three different hyperbaric protocols (up to 2.5, 2.8, and 6 atmospheres absolute [ATA]), resembling a standard hyperbaric oxygen treatment and US Navy treatment tables used for decompression illness and for arterial gas embolism. Two examples of each pump model were examined in every experiment. Results The Easy-pump MZ-257 failed to function completely beyond a chamber pressure of 1.4 ATA, making it unsuitable for use inside the hyperbaric chamber. The Graseby 3100 failed to respond to all keyboard functions at 2.5-2.8 ATA, making it unsuitable for use in most hyperbaric treatments. The Imed 965 performed within an acceptable volume deviation (&lt; or =10%) during most hyperbaric conditions. During the compression phase of the profiles used, and for the low infusion rates only, exceptional volume deviations of 20-40% were monitored. The Infutec 520 demonstrated an acceptable deviation (within 10%) throughout all the hyperbaric profiles used, unaffected by changes in ambient pressure or infusion rate. Conclusions Commercially available infusion pumps operating during hyperbaric conditions demonstrate substantial variations in performance and accuracy. It is therefore important that the hyperbaric facility staff make a careful examination of such instruments to anticipate possible deviations in the accuracy of the equipment during use.
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Kaixuan, Zheng, Long Yun, Xiang Qingjiang, Xu Changjian, Chen Jianping, and Wang Dezhong. "Study on the experiment and numerical simulation of cavitation flow mechanisms at different flow rates in water-jet propulsion pumps." Journal of Physics: Conference Series 2707, no. 1 (2024): 012050. http://dx.doi.org/10.1088/1742-6596/2707/1/012050.
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Abstract Cavitation is an important factor causing vibration and noise of water-jet pump. High-performance ships require water-jet pumps with high efficiency and low noise at high speeds. At present, the cavitation flow phenomenon and interference mechanism of the water-jet pump under different flow rates are not clear enough. This paper takes the mixed-flow water jet propulsion pump as the research object. The flow structure of the cavitation vortex of the water-jet pump under different flow rates was obtained by high-speed photography (HSP). Through comparison of numerical simulation and test results, the cavitation performance curves and cavitation flow structures of the water jet pump under five different flow rates were obtained. The influence of cavitation vortex structure on the performance of water-jet pump under different flow rates was obtained. The correlation between cavitation performance and cavitation vortex structure under different flow rates was established. This research work will help to understand the impact of the cavitation vortex structure of the water-jet pump under different flow rates and capture the evolution law of the cavitation vortex structure of the water-jet pump under different flow rates. And provide reference for improving the cavitation performance of water-jet pumps.
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Liang, Gao Feng, and Qiang Gao. "Multistage Self-Priming Pump Performance Simulation & Test Research." Applied Mechanics and Materials 651-653 (September 2014): 780–83. http://dx.doi.org/10.4028/www.scientific.net/amm.651-653.780.
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Currently the application of traditional centrifugal pump design theory to develop the multi-stage centrifugal pumps is very mature, but the factor of affecting hydraulic performance of centrifugal self-priming pump is still unclear. In this paper, using CFD method to simulate the hydraulic performance of the multistage self-priming pump in different operating conditions, and get the performance prediction curve. The simulation results were compared with experimental data, the result shows that simulation method can accurately predict the performance and internal flow characteristics of multi-stage self-priming pump. The impact on the hydraulic performance by water-keeper chamber and the gas-liquid separation chamber is very limited. The self-priming components can provide a better hydraulic performance. This will be as a reference for the design of self-priming pump.
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Cheng, Wenjie, Boqin Gu, and Chunlei Shao. "A numerical study on the steady flow in molten salt pump under various conditions for improved hydraulic performance." International Journal of Numerical Methods for Heat & Fluid Flow 27, no. 8 (2017): 1870–86. http://dx.doi.org/10.1108/hff-06-2016-0238.
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Purpose This paper aims to figure out the steady flow status in the molten salt pump under various temperatures and blade number conditions, and give good insight on the structure and temperature-dependent efficiencies of all pump cases. Finally, the main objective of present work is to get best working condition and blade numbers for optimized hydraulic performance. Design/methodology/approach The steady flow in the molten salt pump was studied numerically based on the three-dimensional Reynolds-Averaged Navier–Stokes equations and the standard k-ε turbulence model. Under different temperature conditions, the internal flow fields in the pumps with different blade number were systematically simulated. Besides, a quantitative backflow analysis method was proposed for further investigation. Findings With the molten salt fluid temperature, sharply increasing from 160°C to 480°C, the static pressure decreases gently in all pump cases, and seven-blades pump has the least backflow under low flow rate condition. The efficiencies of all pump cases increase slowly at low temperature (about 160 to 320°C), but there is almost no variation at high temperature, and obviously seven-blades pump has the best efficiency and head in all pump cases over the wide range of temperatures. The seven-blades pump has the best performance in all selected pump cases. Originality/value The steady flow in molten salt pumps was systematically studied under various temperature and blade number conditions for the first time. A quantitative backflow analysis method was proposed first for further investigation on the local flow status in the molten salt pump. A definition about the low velocity region in molten salt pumps was built up to account for whether the studied pump gains most energy. This method can help us to know how to improve the efficiencies of molten salt pumps.
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Beskopylny, Alexey N., Denis Medvedev, Vyacheslav Grishchenko, and Evgeniy Ivliev. "Development of a Small-Working-Volume Plunger Hydraulic Pump with Improved Performance Characteristics." Actuators 14, no. 1 (2025): 34. https://doi.org/10.3390/act14010034.
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Current trends in the development of technology are linked inextricably to the increasing level of automation in technological processes and production systems. In this regard, the development of systems for supplying working fluids with adjustable pumps that have high performance characteristics, an increased service life and low operating costs is an important scientific and technical task. A primary challenge in the development of such systems lies in achieving low fluid flow rates while maintaining stable operating characteristics. This challenge stems from the fact that currently available controlled hydraulic pumps exhibit either a high cost or suboptimal life and efficiency parameters. This work focuses on the development of a plunger hydraulic pump with a small working volume. A mathematical model has been developed to investigate the characteristics, optimize the design of this pump and further expand the size range of such pumps. The solution was implemented on a computer using the dynamic modelling environment MATLAB/Simulink. In order to verify the mathematical model’s adequacy, a plunger pump prototype was built and integrated with a test bench featuring a measurement system. The test results showed higher pump efficiency and a significant reduction in hydraulic losses. An analysis of the obtained data shows that the pump is characterized by increased efficiency due to optimal flow distribution and reduced internal leakage, which makes it promising for use in hydraulic systems requiring improved operating characteristics. The developed pump has more rational characteristics compared to existing alternatives for use in water supply systems for induction superheaters. The experimental external characteristics of the developed pump are 10% higher than the external characteristics of the ULKA EX5 pump selected as an analogue, and the pressure characteristics are 65% higher. It offers production costs that are several times lower compared to existing cam-type plunger or diaphragm pumps with oil sumps and precision valve mechanisms. Additionally, it has significantly better operating characteristics and a longer service life compared to vibrating plunger pumps.