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1
Palumbo, G., D. Pappalardo, and M. Gaibotti. "Charge-pump circuits: power-consumption optimization." IEEE Transactions on Circuits and Systems I: Fundamental Theory and Applications 49, no. 11 (November 2002): 1535–42. http://dx.doi.org/10.1109/tcsi.2002.804544.
2
Khushiev, S., O. Ishnazarov, J. Izzatillaev, S. Juraev, and Sh Karakulov. "Assessment of the impact of the main technological characteristics of wells on the power consumption of pumps." IOP Conference Series: Earth and Environmental Science 939, no. 1 (December 1, 2021): 012019. http://dx.doi.org/10.1088/1755-1315/939/1/012019.
Анотація:
Abstract The issue of assessing the impact of the main technological characteristics of wells on the power consumption of pumps is one of the important issues. Based on the analysis of the data obtained in the article, the electric energy consumption of the well pump device the rotational speed of the pump (co); the density of the solution (liquid) (p); the pressure generated by the pump (H); the performance of the pump aggregate (q); depth of the well (H); hydrodynamic resistance (dp); Also, on the basis of the STATISTICA program, the calculation work is carried out, the binding function of the pumps is determined to what extent the factor affects the electricity consumption, and is described in the Pareto diagram.
3
Revel-Muroz, Pavel A., Georgy N. Matveev, Leonid M. Bekker, and Konstantin Y. Shtukaturov. "Improving power efficiency of underloaded pipelines with variable frequency drives." Pipeline Science and Technology 4, no. 1 (March 31, 2020): 4–9. http://dx.doi.org/10.28999/2514-541x-2020-4-1-4-9.
Анотація:
The paper considers the option to reduce power consumption in the operation of the underloaded trunk pipeline by engaging additional pump units with lower rotor r.p.m. control using variable frequency drive. Under these conditions, the operating point of the pumps (delivery rate, head) approaches to the rated output, thus increasing the efficiency of the pumps and decreasing the electricity power consumption for pumping operations. The paper presents comparative calculations of operating conditions for a section of the trunk pipeline with a specified pumping capacity of 35 million t/year (60 % of the design load) when one, two and three main line pumps with variable frequency drives are engaged. The power consumption for pumping is calculated using the dependence of the variable frequency drive and motor efficiencies on the electric motor load and rotational speed. Based on the results of calculations, the electric energy saving is determined when additional pumping units are engaged. The experience has shown that when the second main line pump was engaged, the electric energy saving for pumping was 3.7% compared to the condition with one pump running. However, if the third pump is engaged, the saving is only 1.9 % – the decrease is due to lower motor and variable frequency drive efficiencies in the underloaded condition.
4
Tijani, Alhassan Salami, Nazri Mohammed, and Werner Witt. "Saving Primary Energy Consumption Through Exergy Analysis of Combine Distillation and Power Plant." Scientific Research Journal 9, no. 2 (December 31, 2012): 65. http://dx.doi.org/10.24191/srj.v9i2.5388.
Анотація:
Industrial heat pumps are heat-recovery systems that allow the temperature ofwaste-heat stream to be increased to a higher, more efficient temperature. Consequently, heat pumps can improve energy efficiency in industrial processes as well as energy savings when conventional passive-heat recovery is not possible. In this paper, possible ways of saving energy in the chemical industry are considered, the objective is to reduce the primary energy (such as coal) consumption of power plant. Particularly the thermodynamic analyses ofintegrating backpressure turbine ofa power plant with distillation units have been considered. Some practical examples such as conventional distillation unit and heat pump are used as a means of reducing primary energy consumption with tangible indications of energy savings. The heat pump distillation is operated via electrical power from the power plant. The exergy efficiency ofthe primary fuel is calculated for different operating range ofthe heat pump distillation. This is then compared with a conventional distillation unit that depends on saturated steam from a power plant as the source of energy. The results obtained show that heat pump distillation is an economic way to save energy if the temperaturedifference between the overhead and the bottom is small. Based on the result, the energy saved by the application of a heat pump distillation is improved compared to conventional distillation unit.
5
Tijani, Alhassan Salami, Nazri Mohammed, and Werner Witt. "Saving Primary Energy Consumption Through Exergy Analysis of Combine Distillation and Power Plant." Scientific Research Journal 9, no. 2 (December 31, 2012): 65. http://dx.doi.org/10.24191/srj.v9i2.9409.
Анотація:
Industrial heat pumps are heat-recovery systems that allow the temperature of waste-heat stream to be increased to a higher, more efficient temperature. Consequently, heat pumps can improve energy efficiency in industrial processes as well as energy savings when conventional passive-heat recovery is not possible. In this paper, possible ways of saving energy in the chemical industry are considered, the objective is to reduce the primary energy (such as coal) consumption of power plant. Particularly the thermodynamic analyses of integrating backpressure turbine of a power plant with distillation units have been considered. Some practical examples such as conventional distillation unit and heat pump are used as a means of reducing primary energy consumption with tangible indications of energy savings. The heat pump distillation is operated via electrical power from the power plant. The exergy efficiency of the primary fuel is calculated for different operating range of the heat pump distillation. This is then compared with a conventional distillation unit that depends on saturated steam from a power plant as the source of energy. The results obtained show that heat pump distillation is an economic way to save energy if the temperature difference between the overhead and the bottom is small. Based on the result, the energy saved by the application of a heat pump distillation is improved compared to conventional distillation unit.
6
Larin, Mikhail, and Andrey Volkov. "Reducing the maximum power consumption of a group of sucker-rod pumps with the mechatronic drive by optimizing the control algorithm." E3S Web of Conferences 326 (2021): 00037. http://dx.doi.org/10.1051/e3sconf/202132600037.
Анотація:
For the development of lowand medium-rate wells, the most commonly used installations are sucker-rod pumps. The group of sucker-rod pumps connected to the same power supply system is installed on the wells of one oilfield. The work of a sucker-rod pump is cyclical. Obviously, there is a relationship between the maximum power consumption of a group of cycle drives and the performance of this group. Selecting such a strategy for reducing the maximum power consumption, in which there will be no significant performance reduction, is an urgent problem. In this article, theoretical approaches are formulated for constructing the simulation model of a sucker-rod pump group as a group of cycle drives with unequal cycles. Several group control strategies that reduce the maximum value of power consumption are considered.
7
Rakhutin, M. G., Tran Van Hiep, and Le Van Loi. "Justification of the optimal operating time for the main pumps of a mining hydraulic excavator." Mining Industry Journal (Gornay Promishlennost), no. 2/2024 (May 15, 2024): 116–20. http://dx.doi.org/10.30686/1609-9192-2024-2-116-120.
Анотація:
As the pump operates and wears out, the gap in the friction pairs increases and the volumetric efficiency decreases, the pump flow gets reduced, which leads to increasing duration of working and auxiliary operations, the operating cycle of the excavator, a decrease in its productivity and excessive fuel consumption. Infrequent pump replacement can lead to a significant increase in fuel consumption and reduced excavator performance. If the pump is replaced prematurely, its service life will not be used to the full extent. In order to develop a method for establishing optimal operating hours that allow minimizing fuel consumption and the cost of replacing a pump, taking into account operating conditions, a mathematical model of the pump operation is proposed, which makes it possible to obtain an expression for determining the differentiated optimal value of operating time between replacements. A calculation method and a software algorithm have been developed in the MatLab Simulink software suite to calculate the rate of decrease in the volumetric efficiency, as well as to establish the influence of volumetric efficiency on the fuel consumption and performance of a hydraulic excavator to be utilized in the model using the example of the HPV375 pump of the Komatsu PC2000-8 excavator, Based on the proposed mathematical model of the main pumps operation, a method has been developed for calculating the differentiated operating time between replacements of the main pumps of a mining hydraulic excavator, taking into account the rate of decrease in volumetric efficiency, replacement costs and damage due to changes in productivity and excessive fuel consumption. The dependence of the rate of changes in the volumetric efficiency of the pump is presented for the excavation, viscosity, contamination and temperature of the working fluid parameters. A coefficient of “reserve of partial engine power transferred to the pump” is proposed, determined by the ratio of the difference between the average maximum and initial partial power to the value of the initial partial power, which allows estimation of the operating time of the main pumps without affecting productivity of the excavator.
8
Indra, Rezhi Dika, Ade Syaiful Rachman, Wafiyuddin Wafiyuddin, and Eddy Setiadi Soedjono. "Strategy to Improve the Performance of The Ngagel I Water Treatment Plant (IPA) in Pdam Surya Sembada Surabaya City Through Increasing Pump Efficiency." Jurnal Indonesia Sosial Teknologi 5, no. 2 (February 25, 2024): 527–39. http://dx.doi.org/10.59141/jist.v5i2.925.
Анотація:
PDAM Surya Sembada Surabaya’s energy cost in 2021 amounted to Rp 147.654.439.569, with an energy cost ratio of 24.37%, and the electricity cost of production unit accounted for 76% of the total energy consumption of PDAM. The relatively flat topography does not allow gravity-based systems for water supply. Aging equipment has decreased overall pump efficiency (ηpt) and increased energy consumption, particularly in Ngagel I WTP, built in 1922, necessitating an energy audit. Energy audit includes measuring pump flow rate and pressure, power, voltage, current, power factor, pump and motor pump rotation and temperature. Analysis shows that raw water pumps U2, U3, U5, and S1 and distribution pumps U1, U3, and T4 are still in good condition. However, raw water pump U6 and distribution pumps U6, S1, and S2 require reconditioning and impeller adjustment due to declining efficiency. Furthermore, PDAM must inspect the distribution pump T1 with the lowest efficiency value (49.77%) to determine the appropriate repairs. The research results are action recommendations expected to serve as input and considerations for PDAM in their efforts to improve energy efficiency.
9
Handayani, Sri Utami. "KARAKTERISTIK POMPA SENTRIFUGAL ALIRAN CAMPUR DENGAN VARIABLE FREQUENCY DRIVE." ROTASI 15, no. 3 (December 19, 2013): 30. http://dx.doi.org/10.14710/rotasi.15.3.30-34.
Анотація:
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.
10
Lin, Jr-Lin, and Shyh-Fang Kang. "Analysis of carbon emission hot spot and pumping energy efficiency in water supply system." Water Supply 19, no. 1 (April 2, 2018): 200–206. http://dx.doi.org/10.2166/ws.2018.067.
Анотація:
Abstract Evaluation of carbon emission hot spots for water treatment plants (WTPs) is crucial to reduce carbon emissions. This study aims to analyze carbon emission data generated at Bansin WTP following the PAS 2050 guidelines. The boundary of inventory and assessment includes water intake, purification, and distribution stages. In addition, pumping efficiency, power consumption per pump lift and specific energy consumption were used to estimate the potential of energy reduction in pumping for Bansin and Baoshan WTPs. The results have revealed that the carbon footprint of Bansin WTP is 0.39 kg CO2e/m3 in 2011. There is 95% of carbon emissions generated by pumping from the intake and distribution stages, and the use of pumping is responsible for 65% of total carbon emissions in the clarification stage. The power consumption per pump lift can be calculated to evaluate the difference between rated power and operational power. This relationship can provide information indicating to operators when to replace or maintain poorly-functioning pumps. The data on pump lift, flow rate and power can also be calculated to determine the relationship between pumping efficiency (%) and specific energy consumption (kW/Q), and then used to identify the optimum condition of pump combinations for a given production of water supply.
11
Olishevskyi, I. H. "Substantiation of energy efficiency of automated heating technology at HPS." Electrical Engineering and Power Engineering, no. 2 (June 27, 2024): 36–43. http://dx.doi.org/10.15588/1607-6761-2024-2-4.
Анотація:
Purpose. Justification of rational control parameters of heat pumps to ensure energy-efficient operation of hydroelectric power plants in heating mode. Development of an automated methodology for calculating rational parameters for a complex system of hydroelectric power station (HPS) operating in heating mode. Methodology. Mathematical analysis and modeling. Findings. The application of the heat pump to ensure the heating mode at the hydroelectric power station for the needs of heating and hot water supply of buildings is analytically substantiated, as well as the rational parameters of the heat pump, which ensure the efficient heating mode at the hydroelectric power station, are determined. It is impractical and inefficient to pass the full flow of water passing through the hydraulic unit through the heat pump, because in this case the energy consumption in the heat pump compressor is several times higher than the consumption of the hydraulic unit in pumping mode, which devalues the proposed measure as an energy-saving measure. Therefore, the limiting and rational values of the design and operating parameters of the heat pump and heat accumulator, which ensure the heating mode of operation of the HPS to meet the needs of hot water supply, were substantiated. According to the proposed technology, the operation of a hydro unit with a typical capacity of 120 MW in the heating mode for various energy consumptions for the electric drive of the heat pump compressor was investigated. In accordance with these costs, the values and ratios of the electricity and heat generation shares of the modernized HPS changed. The proposed unconventional technology for converting hydroelectric power plants to the heat generation mode allows for wide effective maneuvering in different proportions of electric and thermal generation, unlike CHP and other power plants. The technology under consideration allows for virtually no consumption of non-renewable energy resources, providing consumers with both electric and thermal energy. Originality. The technology of using a heat pump to transfer the operation of the hydroelectric power station to the heating mode (heating and hot water of residential buildings) is substantiated. An automated technique for determining the rational parameters of heat pump (HP) for the implementation of HPS heating technology has been developed. The developed automated technique allows to calculate the values of operational parameters of HP for the balance and arbitrary modes, which ensure the heating operation of the HPS to meet the current needs of heating and hot water supply. Practical value. The use of a heat pump at a hydroelectric power station for heating and hot water supply allows you to save a third of conventional fuel consumption compared to a boiler unit.
12
Lu, Jyun-Ting, Yung-Chung Chang, and Cheng-Yi Ho. "The Optimization of Chiller Loading by Adaptive Neuro-Fuzzy Inference System and Genetic Algorithms." Mathematical Problems in Engineering 2015 (2015): 1–10. http://dx.doi.org/10.1155/2015/306401.
Анотація:
A central air-conditioning (AC) system includes the chiller, chiller water pump, cooling water pump, cooling tower, and chilled water secondary pumps. Among these devices, the chiller consumes most power of the central AC system. In this paper, the adaptive neuro-fuzzy inference system (ANFIS) and genetic algorithm (GA) were utilized for optimizing the chiller loading. The ANFIS could construct a power consumption model of the chiller, reduce modeling period, and maintain the accuracy. GA could optimize the chiller loading for better energy efficiency. The simulating results indicated that ANFIS combined with GA could optimize the chiller loading. The power consumption was reduced by 6.32–18.96% when partial load ratio was located at the range of 0.6~0.95. The chiller power consumption model established by ANFIS could also increase the convergence speed. Therefore, the ANFIS with GA could optimize the chiller loading for reducing power consumption.
13
Lyakhomskii, Aleksandr, Anton Petrochenkov, Aleksandr Romodin, Evgenia Perfil’eva, Sergey Mishurinskikh, Andrei Kokorev, Aleksandr Kokorev, and Sergei Zuev. "Assessment of the Harmonics Influence on the Power Consumption of an Electric Submersible Pump Installation." Energies 15, no. 7 (March 25, 2022): 2409. http://dx.doi.org/10.3390/en15072409.
Анотація:
Oil production is a complex technological process that requires significant electricity consumption. The main electricity consumers in oil and gas production workshops are artificial lift facilities. Currently, among the objects of mechanized mining, installations of electric submersible pumps are widespread. When planning technological modes, it is necessary to be able to assess the change in the power consumption parameters when changing the technological process parameters. The paper proposes a typical replacement scheme for the electrical complex element. The power consumption calculation of electric submersible pump installations has been carried out. The error in the power consumption modeling results of electric submersible pump installations in comparison with the results of instrumental measurements is no more than 10%. The estimation of additional losses of electric energy caused by the influence of harmonics is carried out. The proposed technique makes it possible to estimate the power consumption of an electric submersible pump installation when changing the parameters of the technological process and equipment. The results of the work can be used for planning material support and optimization of warehouse stocks within the framework of integrated logistics support for the technological process of industrial enterprises.
14
Bordeasu, Dorin, Florin Dragan, Ioan Filip, Iosif Szeidert, and Gelu Ovidiu Tirian. "Estimation of Centrifugal Pump Efficiency at Variable Frequency for Irrigation Systems." Sustainability 16, no. 10 (May 15, 2024): 4134. http://dx.doi.org/10.3390/su16104134.
Анотація:
The sustainability of the food production achieved with the help of irrigation systems and the sustainability of their energy consumption are major challenges of the current century. Pumping systems currently account for approximately 30% of global electrical energy consumption. As electricity prices rise, there is a growing need for technological advancements to enhance energy efficiency and reduce consumption costs effectively. This study focuses on operating centrifugal pumps at variable frequency as an effective means of achieving this goal. Most centrifugal pump manufacturers/providers traditionally assume that pump efficiency remains constant across various operating frequencies, often equating the efficiency at various frequencies to that at the standard frequency (50/60 Hz). In contrast, this paper introduces a new formula for estimating pump efficiency, crucial to precise power consumption determination, particularly in variable-frequency scenarios. The formula parameters are identified by using experimental data acquired from an existing pumping system. The tests and results presented in this paper demonstrate that the proposed formula outperforms the formulas of the current industry standards in accuracy. Practically, the new relation assures enhanced accuracy in estimating pump efficiency and absorbed power, allowing for the design of a more precise model used for control systems synthesis required for operating centrifugal pumps at variable frequency. This research offers a new way of calculating pump efficiency, which could be very useful for industry practitioners seeking to optimize energy consumption in pumping systems.
15
Akarte, Parag. "Solar Based Reciprocating Pump." International Journal for Research in Applied Science and Engineering Technology 10, no. 5 (May 31, 2022): 4492–97. http://dx.doi.org/10.22214/ijraset.2022.43443.
Анотація:
Abstract: The soul of India lives in the villages and the backbone of that soul is the agricultural sector Improvement in irrigation is necessary to strengthen the economic background in agriculture. In present times, more power is required for people to use new equipment. Solar energy must be used optimally to achieve the expected results that it is environmentally friendly and can be run with less power consumption than central pumps and fuel-based pumps. Its ultimate objective is to lift water from the level discharged through water resources. Therefore, electric energy is powered by the help of PV panels and batteries charged by the Sun rays and electric power is obtained to drive the DC motor Which provides power to the reciprocating pump with mechanical power to the connecting rod. The system consists of a single solar panel, battery, motor, crankshaft, exchange pump, valve and tank
16
Coskun, Salih. "Performance analysis of a solar-assisted ground source heat pump system in climatic conditions of Turkey." Thermal Science 24, no. 2 Part A (2020): 977–89. http://dx.doi.org/10.2298/tsci181019302c.
Анотація:
In order to contribute to widespread use of RES in Turkey, a solar-assisted ground source heat pump system was modeled using TRNSYS software and simulated for heating and supplying daily hot water to meet the needs of a restaurant in five sample provinces having different climatic conditions. During the simulation, the dining room temperature of the restaurant was kept constant at 22?C during the winter season and a total of 300 Lph of water (55?C) was used for 15 minutes four times a day. According to the simulation results, power consumption rates in the solar-assisted ground source heat pump system were determined as about 60% for the heat pump, 16% for heaters, 14% for the ground pump and 8% for fans and other pumps. The highest power consumption, as expected, was obtained for Hakkari Province (6723 kW) in the Eastern Anatolia region, which has a cold climate, while the lowest power consumption was obtained for Izmir Province (2822 kW) in the Aegean region, which has mild climatic conditions. The lowest seasonal performance factor and solar factor values were calculated as 2.27 and 32% for Hakkari and the highest as 2.71 and 56% for Izmir, respectively.
17
Oshurbekov, Safarbek, Vadim Kazakbaev, Vladimir Prakht, and Vladimir Dmitrievskii. "Increasing Service Life and System Efficiency of Parallel Pumps Using Combined Pump Regulation." Water 13, no. 13 (June 29, 2021): 1808. http://dx.doi.org/10.3390/w13131808.
Анотація:
The paper discusses the use of the combined control for a system of two parallel pumps to increase its service life. Using the combined control, the pumping system is controlled together by change the speed, throttling, and bypass. The power consumption of the pumping system is calculated for three methods of flow control: with minimum energy consumption, with maximum reliability, and control with a trade-off between efficiency and reliability. In the case of control with maximum reliability, the energy consumption of the pumping system is higher than in the case of control with minimum energy consumption by 29.2%. In the case of the proposed trade-off control, which provides acceptable reliability, the power consumption is higher than with the minimum energy consumption control by only 7.3%.
18
Liang, Xiaodong, and Ernesto Fleming. "Electrical Submersible Pump Systems: Evaluating Their Power Consumption." IEEE Industry Applications Magazine 19, no. 6 (November 2013): 46–55. http://dx.doi.org/10.1109/mias.2012.2215660.
19
Palumbo, G., D. Pappalardo, and M. Gaibotti. "Charge pump circuits: power consumption optimization-a summary." IEEE Circuits and Systems Magazine 4, no. 3 (2004): 26–29. http://dx.doi.org/10.1109/mcas.2004.1337808.
20
Ibarra Bolaños, Germán Alejandro, Jorge Mario Arboleda Mena, Gustavo López, and Yohan Rojas. "Experimental study of the characteristic curves of 0.5 HP radial pump with constant speed." Scientia et Technica 25, no. 4 (December 30, 2020): 534–39. http://dx.doi.org/10.22517/23447214.23701.
Анотація:
Radial (centrifugal) pumps are commonly used in industry and represent 22% of total consumption of the energy worldwide. The understanding of their operating conditions is important for a proper selection and use, specifically at the Best Efficient Point (BEP). This study analyzed the variation of the operating conditions of a common, small pump when the flow is regulated with a control valve at the pump discharge, keeping the rotational speed constant. The system consists in a closed loop using a turbine meter programmed in Arduino for flowrate measurement. The electric power and energy consumption were provided by an electronic Wattmeter, and the pressure at the suction/discharge of the pump was taken from Bourdon gauges. The minimum submergence of the pump intake was calculated with the Standard ANSI-HI-9.8 and the Bourdon gauges selection followed the recommendations of the Standard ASME B40.100-1998. All the measurements are part of the Energy equation for the pump-motor system (monoblock unit), whose H-Q curve is compared to manufacturer’s curve with reasonable agreement that served as validation. The electric power curve is the evidence that the flow regulation method is unappropriated because the power consumption increases as the flow is regulated. At the end, the efficiency curve of the motor-pump unit was presented, with a maximum value of 12%. The shock and recirculation losses are present, but the electrical losses are evidenced through excessive heating. The test bench will have a better pump and a variable frequency drive for further studies.
21
Sinchuk, Igor, Tetyana Beridze, Irina Kasatkina, Roman Krasnopolsky, Oleg Dozorenko, and Ryszard Strzelecki. "Model investigations into assessing optimal power consumption modes for major pump stations of iron ore underground mines." E3S Web of Conferences 280 (2021): 05012. http://dx.doi.org/10.1051/e3sconf/202128005012.
Анотація:
The article investigates into the level of energy efficiency of main water pump stations of iron ore underground mines in case of time-of-day electricity rate. There are developed and suggested methods of analyzing the influence of pump electric capacity on electricity cost based on multifactor regressive models. The data on power consumption of iron ore mines indicates a complex character of analyzing the results obtained. However, application of information technologies enables using static materials in a new way including indices of power consumption, costs, water intake, mining depth, the number of pumps and their capacity by synthesizing mathematical models as complicated objects through in-depth procession of static materials and substantiation of the obtained results. For the first time, there are used multifactor regressive models considering multicollinearity and non-linearity of pump capacity in order to study its influence on power costs by using the elasticity factor. Analysis of mathematical simulation results relevant to static materials and applying the algorithm of studying dependency of the consumed power costs on pumps’ capacity reveals some critical values resulting in corresponding effects. The authors recommend to apply the elaborated algorithm to conducting corresponding calculations by for mining enterprises to monitor formation of the strategy of providing energy efficiency under time-of-day electricity rates.
22
Kolář, David, Adam Bureček, Lumír Hružík, Marian Ledvoň, Tomáš Polášek, Jana Jablonská, and Richard Lenhard. "Static Characteristics and Energy Consumption of the Pressure-Compensated Pump." Processes 12, no. 6 (May 24, 2024): 1081. http://dx.doi.org/10.3390/pr12061081.
Анотація:
The motivation of this research was to assess the possibility of speed control for the selected pressure-compensated pump. Measured static characteristics of an axial piston pump with pressure compensation are presented in the paper. Based on these characteristics, the pump efficiencies are determined. The characteristics and efficiencies are determined for the different pump outlet pressures, pump speeds, relative displacements and for the different pressures set at the pressure compensator. In addition, the different methods of pump control were compared. These are displacement control, speed control and both controls. The efficiency of each control method was compared based on the determined mechanical input power at the pump drive shaft. By comparing these control methods, it was found that the combination of both control methods can achieve up to 93% savings of mechanical power in the controlled state (stand-by state). Also, the adverse effects resulting from each control method that reduces pump efficiency were defined.
23
Treshcheva, Milana, Irina Anikina, Vitaly Sergeev, Sergey Skulkin, and Dmitry Treshchev. "Selection of Heat Pump Capacity Used at Thermal Power Plants under Electricity Market Operating Conditions." Energies 14, no. 1 (January 4, 2021): 226. http://dx.doi.org/10.3390/en14010226.
Анотація:
The percentage of heat pumps used in thermal power plants (TPPs) in the fuel and energy balance is extremely low in in most countries. One of the reasons for this is the lack of a systematic approach to selecting and justifying the circuit solutions and equipment capacity. This article aims to develop a new method of calculating the maximum capacity of heat pumps. The method proposed in the article has elements of marginal analysis. It takes into account the limitation of heat pump capacity by break-even operation at electric power market (compensation of fuel expenses, connected with electric power production). In this case, the heat pump’s maximum allowable capacity depends on the electric capacity of TPP, electricity consumption for own needs, specific consumption of conditional fuel for electricity production, a ratio of prices for energy resources, and a conversion factor of heat pump. For TPP based on combined cycle gas turbine (CCGT) CCGT-450 with prices at the Russian energy resources markets at the level of 2019, when operating with the maximum heat load, the allowable heat pump capacity will be about 50 MW, and when operating with the minimum heat load—about 200 MW.
24
Siregar, Indra Herlamba. "ENERGI KONSERVASI PADA POMPA SENTRIFUGAL DENGAN TORQUE FLOW IMPELLER SEMI OPEN DAN CLOSED PADA PENGATURAN KAPASITAS." Otopro 15, no. 2 (May 16, 2020): 54. http://dx.doi.org/10.26740/otopro.v15n2.p54-58.
Анотація:
Pumps are the most widely used rotating equipment in both the domestic and industrial sectors with a contribution of around 3% of the world's electrical energy usage, in addition to the size of pumps available with many incompatible requirements, it is necessary to regulate their capacity. In this article, there are two capacity setting methods tested, namely valve opening and variable speed drive on semi open and closed centrifugal pump torque flow impeller with blades of 7, 8 and 9. The results explain that in valve opening method the number of blades affects the power consumption pump electricity, although not significant enough, while the variable speed drive method, the number of blades has no effect. However, the power consumption of the impeller closed is lower than the semi open impeller in the valve opening method and there is no significant difference in the variable speed drive method. The capacity setting method with a variable speed drive consumes less electric power than the valve opening method, if the flow of pump more decrease from the initial condition the greater the savings obtained with the variable speed drive method than the valve opening method.
25
Wang, Baoqing, Kun Chen, Cheng Huang, Jinrui Zhao, Yaotong Zhang, Dequan Li, and Lin Wang. "Research on Operation Optimization of LNG Submerged Pump System in LNG Receiving Terminals." Energies 15, no. 9 (April 30, 2022): 3299. http://dx.doi.org/10.3390/en15093299.
Анотація:
This paper focuses on improving the operating efficiency of the Liquified Natural Gas (LNG) submerged pump system in the LNG receiving terminals and achieve energy saving. The minimum input energy consumption of the LNG submerged pump system is taken as the objective function, and an optimization model for the operation of the LNG submerged pump system with variable frequency speed is established. LINGO18.0 optimization software is used to solve the model to get the optimal LNG submerged pump operation plan that satisfies the constraints. Taking a certain LNG receiving terminal as an example, the operation optimization of its LNG submerged pump system is carried out, and the input energy consumption of the system before and after optimization is compared. The results show that the use of variable frequency pumps can reduce the energy consumption of the LNG submerged pump system of LNG receiving terminals, and the optimization model can reduce the input power consumption of the system by about 10% under different transportation conditions. After applying the optimization model to actual production, it is found that the model has certain practicability for guiding the production of LNG receiving terminal.
26
Oshurbekov, Safarbek, Vadim Kazakbaev, Vladimir Prakht, Vladimir Dmitrievskii, and Levon Gevorkov. "Energy Consumption Comparison of a Single Variable-Speed Pump and a System of Two Pumps: Variable-Speed and Fixed-Speed." Applied Sciences 10, no. 24 (December 9, 2020): 8820. http://dx.doi.org/10.3390/app10248820.
Анотація:
The energy efficiency of a multi-pump system consisting of two low-power (0.75 kW) pumps operating in parallel mode and a single-pump mechanism (1.5 kW) is compared in this study. For this purpose, mathematical models, experimental data, and data retrieved from the manuals provided by the pump manufacturers are used. The single-pump system is fed by a single variable speed drive. A multi-pump system running in parallel mode consists of two pumps. One of them is driven by an induction motor connected directly to the electrical grid and equipped with a throttle. Another pump is actuated by an induction motor fed by a variable speed drive. The flowrate of the liquid in the multi-pump is controlled with the help of speed variation and throttling. In the case of the single-pump system the conventional speed control method is applied during the analysis. For both pump system topologies, the daily and annual energy consumption is obtained. As a result of conducted calculations, it was shown that the multi-pump provides 29.8% savings in comparison to the single-pump system in the case of a typical flowrate profile.
27
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.
Анотація:
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.
28
Zabuga, F. V., and V. E. Alekseyuk. "Evaluation of a modernization project of the main condensate scheme at CHP-10 power unit No. 5 using its customized simulation model." iPolytech Journal 26, no. 3 (October 8, 2022): 426–38. http://dx.doi.org/10.21285/1814-3520-2022-3-426-438.
Анотація:
We investigate the effect of modernizing the main condensate scheme applied at the power unit No.5, CHP-10 of Baikal Energy Company LLC, on its energy and economic efficiency using a customized simulation model. Simulation modelling was carried out in the Machine Program Building System software environment. The constructed model was verified using the results of measuring control parameters in several operating modes according to a three-stage procedure of verifying the mathematical models of complex thermal power units. We propose an original approach to modernizing the main condensate thermal scheme at the power unit under study in order to reduce the specific fuel consumption for balance-of-plant needs. The idea was to expand the main condensate scheme by including an additional sealing pump to the feedwater electric pumps of the 1Кs-20-110 unit in order to avoid the incorrect selection of condensate pumps. The study showed that the redistribution of the main condensate flow between the existing condensate pumps and the proposed 1Ks-20-110 sealing pump leads to a reduction in the specific fuel consumption for the electric energy generation to 0.32 g of fuel per kWh across the range of electrical loads from 137 to 150 mW. As a result, the net efficiency of the power unit can be raised by 0.03%. It should be noted that the proposed modernization project may reduce the consumption of electricity for balance-of-plant needs when the feedwater electric pump is switched to the standby mode during an emergency shutdown of the power unit. Based on the performed energy and economic calculations, energy savings for the period of 2019 comprise 82,653 kWh, while the total annual savings are estimated at 78,030 rubles. Thus, the conducted research demonstrates the high efficiency of applying simulation modelling in the study and optimization of existing thermal power plants.
29
Cheng, Ling, Zesheng Yu, Shiyao Xia, Shixuan Li, Ye Li, Huan Zhang, Bin Li, Sirui Zhang, Zijian Liu, and Wandong Zheng. "Evaluation and Optimization of heat Pump Combined District Heating System: A Case Study of China." Energies 15, no. 20 (October 15, 2022): 7622. http://dx.doi.org/10.3390/en15207622.
Анотація:
The district heating area in China is continuously increasing, which brings an increase in district heating load. In order to solve the shortage of heating power and realize the carbon neutral target, this study proposes two retrofit schemes for district heating system by integrating air source heat pump and water source heat pump, respectively. Mathematical models are established to study the performance of the integrated systems and a bilevel optimization model is proposed to optimize them. The results show that the air source heat pump combined district heating system has better performance compared to the conventional system, which reduces 50% energy consumption, 10.8% carbon emissions and achieves better economy. The dynamic coupling property of the district heating network and power grid are also considered, and the results indicate that the introduction of air source heat pump can effectively improve the efficiency and stability of power grid and reduce the seasonal fluctuation. The potential of large-scale application of air source heat pump combined system in Beijing is evaluated. The results reveal that retrofit scheme of integrating air source heat pumps into district heating system can cover 2930 MW heating load and bring 362 million Chinese Yuan profit by reducing 219,000 tons of carbon emissions and 539,000 tons of standard coal consumption in 2025.
30
Alpan, K., and W. W. Peng. "Suction Reverse Flow in an Axial-Flow Pump." Journal of Fluids Engineering 113, no. 1 (March 1, 1991): 90–97. http://dx.doi.org/10.1115/1.2926503.
Анотація:
Experiments are carried out to determine the effects of different inlet geometries on the onset of suction recirculation and its associated power consumption in an axial-flow pump. The critical flow rate is determined by both the “string” visual technique and “pressure” method. The results are correlated with the inlet area and flow velocity distribution upstream of the impeller. Four different conical covers matching the impeller leading edge are employed to cover the impeller inlet completely or partially. Covering the inlet area reduces the critical flowrate corresponding to the onset of suction recirculation and eliminates all recirculation at higher flowrates. The power consumption associated with the suction recirculation flow for the uncovered impeller is determined by comparing the shaft powers with and without inlet covers. At the shut-off condition, the power is estimated from a comparison with the shaft power measured with the impeller inlet completely covered. Experimental studies conclude that the power consumption due to suction recirculation is mainly controlled by the impeller inlet area and is insensitive to the inlet pipe configuration. At shut-off condition, the power coefficient correlates well with the parameter based on the hydraulic radius of inlet area. At a finite through flowrate the analytical model recommended by Tuzson (1983) is adequate, except for a proportionality coefficient determined from the test data.
31
Zheng, Hong Bo, and You Song Sun. "Research on Pump-Controlled Servo Hydraulic Press and its Energy Consumption Experiments." Advanced Materials Research 988 (July 2014): 590–96. http://dx.doi.org/10.4028/www.scientific.net/amr.988.590.
Анотація:
A solution was proposed to reform the traditional hydraulic presses by the technology of pump-controlled servo hydraulic power: PMSM(Permanent magnet synchronous servo motor ) and fixed displacement pump replaced the traditional inductive motor and fixed displacement pump as the power unit ; the electromagnetic reversing system, the rapid cylinder and the prefill system were kept; displacement sensors, pressure sensors and a proportional relief valve were added to the hydraulic system. A deep drawing process was taken as an example to analyze the energy consumption by experiments. The results indicated that in the same conditions the pump-controlled servo hydraulic press reached more than 20% energy saving effect in comparison with the traditional hydraulic press and had higher power factor. The main reasons for energy saving are the PMSM has higher efficiency and power factor, and the overflow loss, the standby loss are decreased.
32
Kumar, K. M., P. Venkateswaran, and P. Suresh. "Effective Fuel Consumption by Improving Cooling Water Flow Rate in IC Engine." Applied Mechanics and Materials 812 (November 2015): 112–17. http://dx.doi.org/10.4028/www.scientific.net/amm.812.112.
Анотація:
The coolant (water) pump assumes an important role of cooling system in IC engines. With upgrading of the engine power by turbocharging and turbo inter cooling, the water pump capacity needs to be increased corresponding to the power. This capacity enhancement has to be achieved without calling for a major change in the existing water pump, envelop and related fitment details. This requires a clear understanding of centrifugal pump for its performance parameter. One such engine is upgraded by turbocharging from 195PS to 240PS @2200 rpm. Improving water pump flow by changing the impeller dimensions, impeller casing, increase the suction, delivery pipe diameter had been done. Validation of the water pump in its actual engine installation was taken up as a part of the research work. Flow rate comparison of the new pump with the existing pump was made and the results were analyzed. The new water pump gives better flow rates for the engine speeds up to1800 rpm, beyond which the flow rate is slightly lesser than the existing pump.
33
Golesorkhie, Farya, Fuwen Yang, Ljubo Vlacic, and Geoff Tansley. "Field Oriented Control-Based Reduction of the Vibration and Power Consumption of a Blood Pump." Energies 13, no. 15 (July 30, 2020): 3907. http://dx.doi.org/10.3390/en13153907.
Анотація:
Power quality and energy efficiency are of great importance in motor control. The motor of any medical device needs to have a smooth torque and minimal vibration in order to maximise its energy efficiency and patient comfort. Furthermore, in rotary blood pumps, excessive energy wasted due to vibration is converted into uncontrolled movement of the mechanical parts and thus could reduce the life of the motor-pump. Besides mechanical or hydraulic origin, one of the causes of vibration in any pump is torque ripple resulting from motor phase commutation. In this paper, using relevant equipment, two extreme scenarios were examined for vibration and electrical efficiency comparison due to power quality in a blood pump: one trapezoidal control with a trapezoidal phase current output; the other a field oriented control (FOC) with a non-distorted sinusoidal phase current. The test motor-pump was the Arteriovenous Fistula Eligibility (AFE) System that is used prior to haemodialysis. The trapezoidal technique was implemented utilising the Allegro a4941 fan driver (Allegro Microsystem, 2012), and the FOC technique was implemented using the Texas Instrument digital signal processor (TMS320F28335). The aim was to reduce the energy wasted over vibration, and to achieve smooth operation of the AFE System. Vibration was measured with a one-axis accelerometer; results showed considerably lower vibration due to less current ripple associated with the FOC control as well as lower power consumption.
34
Thorsteinsson, Simon, Søren Østergaard Jensen, and Jan Dimon Bendtsen. "Model predictive control of heat pump based on a regression model fitted to data measured in accordance to EHPA regulation." E3S Web of Conferences 246 (2021): 11008. http://dx.doi.org/10.1051/e3sconf/202124611008.
Анотація:
This paper presents a method for fitting a static regression model for the power consumption of a ground-sourced domestic heat pump, based on a low number of sample points extracted from a common measurement report developed in accordance to European Heat Pump Association (EHPA) regulation. Thereafter, we demonstrate how the coefficients can be updated with a Recursive Least Squares algorithm using only commonly accessible measurements. The regression model is designed to be used for control of a heat pump connected to an ON/OFF controlled floor heating system. The target of the method is especially systems where the flow in the floor heating circuits is unknown. The ability of the regression model to predict power consumption of the heat pump is evaluated using measurements obtained from a test-rig having the particular heat pump installed. The regression model is implemented as a module in a Mixed Integer Non-linear Model Predictive Control algorithm to illustrate the applicability of the model for control purposes. The promising results obtained from this investigation raise the question; should quality data be available in order to enable more advanced control of domestic heat pumps?
35
Kato, Hiroyuki, Hiroyuki Fujimoto, and Kenichi Yamashina. "Operational Improvement of Main Pumps for Energy-Saving in Wastewater Treatment Plants." Water 11, no. 12 (November 21, 2019): 2438. http://dx.doi.org/10.3390/w11122438.
Анотація:
Efforts towards energy independence in wastewater treatment plants (WWTPs) constitute important policy in Japan. Energy-saving strategies consist of operational improvements and the installation of energy-saving devices. The energy consumed by the main pumps is equal to approximately 14% of the energy consumed by WWTPs in average in Japan. The main pumps, which are simple machines, do not have the innovative, energy-saving devices associated with other equipment used in WWTPs; therefore, realizing energy savings through operational improvement is extremely important. In recent years, variable frequency drives (VFDs) have increasingly been used to control the rotation speed of main pumps in order to save energy. However, there are many cases where power consumption increases due to the excessive rotation speed control ignoring pump characteristics. In this study, improvement of the operating method based on the power consumption analysis is examined for A WWTP. Differences in characteristics between water pumps and wastewater pumps are discussed, and simulation results without rotational speed control show a reduction in power consumption of 10%. Daily operational report data of the WWTP are used for the power consumption analysis, and additional data acquisition is not necessary. Thus, the power consumption analysis method used in this study can be easily applied to other WWTPs.
36
Yin, Zhiqiang, Lin Shi, Junru Luo, Shoukun Xu, Yang Yuan, Xinxin Tan, and Jiaqun Zhu. "Pump Feature Construction and Electrical Energy Consumption Prediction Based on Feature Engineering and LightGBM Algorithm." Sustainability 15, no. 1 (January 1, 2023): 789. http://dx.doi.org/10.3390/su15010789.
Анотація:
In recent years, research on improving the energy consumption ratio of pumping equipment through control algorithms has improved. However, the actual behavior of pump equipment and pump characteristic information do not always correspond, resulting in deviations between the calculated energy consumption operating point and the actual operating point. This eventually results in wasted power. To solve this problem, the data from circulating pumping equipment in a large pumping facility are analyzed, and the necessary characteristics of pumping equipment electrical energy consumption are analyzed through a subset of mechanism expansion feature engineering using the Pearson correlation coefficient algorithm. Based on this, a pump energy consumption prediction method based on LightGBM is constructed and compared with other algorithm models. To improve the generalization ability of the model, rules applicable to pump power energy consumption prediction are proposed, and the model features and processes are reduced. Based on the mechanistic model, 18 features related to electric energy consumption are selected, and 6 necessary features of pump electric energy consumption are screened by feature engineering. The experimental results show that the LightGBM regression algorithm has a significant prediction effect with R2=0.94. After the importance analysis, three features that are strongly related to pump energy consumption are finally screened out. According to the prediction results, the feature engineering dataset was selected and the pump electrical energy consumption was predicted based on the LightGBM algorithm, which can significantly reduce the problem of deviation in the prediction of the electrical energy consumption of pumping equipment.
37
Indrawan, Andi Wawan, Purwito, AR Ashar, Ahmad Rizal Sultan, and Setio Imanulloh. "A Boiler Feed Pump Speed Control to Reduce Its Own Power Consumption According to Pump Affinity Law." IOP Conference Series: Earth and Environmental Science 1209, no. 1 (July 1, 2023): 012029. http://dx.doi.org/10.1088/1755-1315/1209/1/012029.
Анотація:
Abstract The change in water flow required at the BFP pump at the Barru Power Plant is only regulated by a valve located on the pressure side, causing excess power consumption and its own power consumption. One effort to save energy usage is to make frequency adjustments that refer to the right pressure and water flow. To determine the effect of frequency adjustments on the expected pump pressure, a simulation of frequency inverter modeling is performed using the SPWM switching method based on the pump affinity law using Matlab application software. The simulation results obtained that by adjusting the frequency range of the inverter from 45.5 Hz to 50 Hz and keeping the pump pressure above the minimum limit of 13.2 MPa, the operating power savings of the BFP motor are obtained from 46 kW to 378 kW.
38
Sagdatullin, A. M. "POWER-EFFICIENCY ANALYSIS OF OIL WELL SYSTEMS WITH SUCKER ROD PUMPING UNITS." Oil and Gas Studies, no. 4 (August 30, 2015): 80–84. http://dx.doi.org/10.31660/0445-0108-2015-4-80-84.
Анотація:
The purpose of this paper is to analyze the power efficiency of oil well systems with sucker rod pumping units. For this study a chain-drive of HRC 80-6-02 type and a similar performance drive HRC 80-6-02 balancer pumping unit were selected. Based on the analysis of the data, a conclusion was made that the power consumption for production of oil using ESP units is much higher due to a low coefficient of performance (COP) and significant losses in the submerged electric-driven pump. The analysis showed that for a half cycle of operation, i.e. per one stroke, the power consumption by a jack-pump was 15-20% higher than that of the chain drive. It is concluded that the chain drive is superior in many aspects of sucker-rod pumping units operation and may be the most effective replacement for ESP units, as well as for units with walking-beam jack pumps.
39
Prihadi, Donny Ridwan, Ronggo Ridwan Prihadi, Sunu Herwi Pranolo, Joko Waluyo, and Firman Asto Putro. "Optimization of Condensate Transfer Pump in the Hydrocarbon Condensate Stabilization Unit of Natural Gas Liquefaction Plant – An Industrial Case." International Journal of Applied Science 5, no. 2 (November 7, 2022): p1. http://dx.doi.org/10.30560/ijas.v5n2p1.
Анотація:
PT. Badak NGL is a commercial LNG producer located in Bontang, Indonesia. In recent years, the decline in LNG production of PT. Badak NGL results in a lower hydrocarbon condensate flow rate. To prevent power losses since its pump operated at below rating, a new operation scheme was proposed. This new scheme adjusts the way of pump is operated without any alteration in terms of pump characteristics. Three pumps operated intermittently for 8 hours per day at a maximum flow rate. The pump power consumption was calculated based on electric current data monitored relay panel. The results show that the pump energy saved by 60% with the absolute value of annual energy efficiency of 957.7 MWh. This study contributes to reducing the greenhouse effect by 412 tons eq CO and the annual production cost of around USD 130,000. The new scheme reliability examines by evaluating pump vibration, pump performance, hydrocarbon condensate quality, and condensate tank liquid level. The result shows that the pump’s vibration in the range of 0.21 in/sec with a steady winding temperature.
40
Shubenko, Oleksandr, Oleksandr Usatyi, Mikola Babak, Yana Forkun, and Oleksandr Senetskyi. "DETERMINING THE OPTIMUM POWER OF AN ABSORPTION HEAT PUMP WHEN IT INTEGRATING TO PT-60/70-130/13 THERMAL SCHEME." Bulletin of the National Technical University "KhPI". Series: Hydraulic machines and hydraulic units, no. 2 (January 24, 2024): 4–15. http://dx.doi.org/10.20998/2411-3441.2023.2.01.
Анотація:
The problem of determining the optimal thermal power of an absorption heat pump with steam heating at one-stage regeneration (COP = 1.71) is solved. The heat pump is integrated into the thermal scheme of PT-60/70-130/13 steam turbine. The heat supply schedule for this steam turbine cycle is 150/70 °С. The installation also produces steam for technological needs. The thermal and flow rate characteristics of an absorption heat pump are determined using the constructed and proposed approximation mathematical model. Based on the analysis and existing experience, an optimization problem was formulated. The goal function is to select the integrated absorption heat optimal power pump with the condition of optimal energy fuel consumption. The search for the optimal thermal power of an absorption heat pump was carried out under the condition of steam release through a controlled production turbine extraction with parameters of 1.296 MPa, 280 °C. Options for variable steam consumption for process needs (0, 20, 50 and 80 t/h) were considered. The condition was constancy of consumption throughout the year. The results obtained showed that, relative to all considered turbine loading modes, the optimal power value of the absorption heat pump is identical and amounts to ~ 17.25 MW. Calculation studies have shown that at a cost of electricity of 0.13 USD/(kWh) and equivalent fuel of 309 USD/t, a power unit with PT-60/70-130/13 turbine and an integrated absorption heat pump (thermal power 15–18 MW) with a production load of more than 20 t/h of steam, as well as a consumption of recycled network water for heat supply of more than ~ 1550 t/h, the payback of the energy saving project will be achieved in less than 3 years. The next positive effect is that fuel savings can reduce CO2 emissions by 9321 tons and NOx by 48 tons. According to research results, we observe a positive environmental effect from the integration of an absorption heat pump into the existing thermal scheme.
41
Almohammed, Omar Abdulhadi Mustafa, Farida Mizkhatovna Philippova, Fouad Ibrahim Alhajj Hassan, Nail Farilovich Timerbaev, and Anatoliy Anatolyevich Fomin. "Practical study on heat pump enhancement by the solar energy." E3S Web of Conferences 288 (2021): 01069. http://dx.doi.org/10.1051/e3sconf/202128801069.
Анотація:
The heat pumps system is one of the most remarkable system that is widely used around the world, their capacity is different according to necessity. The energy consumption in those systems will limit their effectiveness. This study will try to prove the positive reactance of the new changes (the additional heat exchanger) on the heat pump work, where the power consumption will reduce about (13-17%). The study includes the experimental results of the laboratory model, which has been manufactured in the laboratories of the technical college of Mosul/Northern technical university-Iraq. The model consists of the heat pump that was improved by using the additional heat exchanger, its duty is to heat the refrigerant before entering the compressor, by using solar energy. The results of this work prove the positive effect of the additional heat exchanger, on the coefficient of performance of the heat pump, in both modes of heating and cooling. The conclusions are useful to the industries that deal with heat pumps.
42
Prof. Praveen Rathod, Shreerang Karambelkar, Rutvik Khaire, Mangesh Dhavale, and Pruthviraj Raut. "Automated Water Pump System." international journal of engineering technology and management sciences 7, no. 3 (2023): 247–55. http://dx.doi.org/10.46647/ijetms.2023.v07i03.032.
Анотація:
Automated water pump systems are becoming increasingly important as they can regulate water pumps based on current data and conditions, reducing energy use and water waste while ensuring efficient water distribution. Research shows that automated water pump systems have several advantages over traditional manual systems, including increased efficiency, lower energy consumption, better water management, and improved pump performance. However, there are also some drawbacks to using these systems, such as higher upfront costs due to advanced equipment and technology requirements, complex installation and design demands, and the need for a reliable power source. The choice of automated water pump system depends on the particular application and requirements, as each type has its own strengths and weaknesses. The article's methodology involves connecting the solid-state relays, ESP32, power supply, and water pump to enable automated operation. The Arduino IDE software is used to program the system, allowing the user to specify when the water pump should be triggered. The system is then controlled by the ESP32 microcontroller, which turns on the relay module to power the water pump until the user-specified threshold level is reached. This ensures that the plants receive the correct amount of water for optimal growth without the need for manual assistance. The article also discusses the hardware used, including the ESP32 microcontroller and relay module.
43
Mohammad Noor Hidayat, Sigi Syah Wibowo, and Moch. Guntur Eka Prasetya. "Kajian Manajemen Energi Listrik Pada Stasiun Pompa Air." Elposys: Jurnal Sistem Kelistrikan 7, no. 3 (February 17, 2023): 27–32. http://dx.doi.org/10.33795/elposys.v7i3.665.
Анотація:
One of the important components for a drinking water company is the operation of a pump station that functions to regulatethe water supply from existing water sources to customers. To operate the water pump, an electric motor is needed as the driving force. Inorder for the energy consumption needed to operate an electric motor to be regulated, it is necessary to manage electrical energy at thepump station. One example of a pump station is the local water company (PDAM) Unit Wendit Malang City. This unit consists of 3 pumpstations namely Wendit 1, Wendit 2 and Wendit 3. These three parts are supplied by 2 transformers with a capacity of 1110 kVA for Wendit2 and 1730 kVA for Wendit 1 and 3.From the results of power factor measurements in the three sections , it is known that the power factorvalue at the Wendit 3 pump station is 0.82. This value does not meet the PLN minimum standard, which is 0.85. If the power factor is lessthan 0.85 then the industry will incur the excess reactive power consumption (kVARh) charges. Therefore it is necessary to study energymanagement at the pump station of PDAM Unit Wendit Malang City. To improve the low power factor, two recommendations were given,namely the installation of VSD (Variable Speed Drive) at the PDAM Unit Wendit 1 and 3 pump stations and the installation of a CapasitorBank at the PDAM Unit Wendit 2 pump station.Based on the analysis, the power factor value PDAM Wendit 3, which was originally 0.82increased to 0.9. In addition, there are savings in electricity consumption per month of 10.48% at PDAM Unit Wendit 1 and 3 and 28.32%at PDAM Unit Wendit 2.
44
Steingräber, Robert, and Matthias Kiesner. "Real World Experience with an Optimized Control Scheme for a Ventricular Assist Device." Current Directions in Biomedical Engineering 6, no. 3 (September 1, 2020): 307–10. http://dx.doi.org/10.1515/cdbme-2020-3079.
Анотація:
AbstractA closed-loop control software for the new mobile Berlin Heart EXCORR driving unit was optimized to balance usability, durability, pump wash out, blood stress and power consumption. The piston of the electro-pneumatic cylinder is moved on a pump-cannula-specific trajectory. A friction and a valve model are adapted online. Verification and real world data show constant flow, low power consumption and the adherence of all limits.
45
Chen, Cheng Min, Min Xu, Rong Feng Sun, and Xiao Xu Fan. "Environmental Evaluation of Different Heating Systems." Advanced Materials Research 864-867 (December 2013): 2156–60. http://dx.doi.org/10.4028/www.scientific.net/amr.864-867.2156.
Анотація:
This study compares environmental impact of different heating systems with life cycle analysis, and get out if heat pump system has advantage in replacing boiler heating systems. Systems energy use are compared in one-year operation phase for residential buildings located in Tianjin city, including waste water heat pump system, coal boiler system and gas boiler system. In order to analyzed the environment performance of heat pump system in different conditions. The power structure impact to heat pump systems is analyzed using life cycle analysis method. The results indicate that with COP=4, even if 100% coal power is used, heat pump has advantage in the most impact factors, and if more clean power is used, the environment impact in heat pump system will be reduced obviously. The result also shows that waste water use in heat pump system impact the result little for its small quantity. Nomenclature GW, Global Warming; NRC: Non-renewable Resource Consumption; OD: Ozone Depletion; ACI, Acidification; EUT, Eutrophication; SPO, Synthesis of photochemical ozone; SW, Solid Waste; HW, Hazardous Waste; SD, Smoke and Dust. RC: Renewable Resource Consumption
46
Sugimura, Ken, and Katsumasa Suzuki. "Using Intermittently Operated Oil Hydraulic Pump Unit with Accumulator to Save Energy." International Journal of Automation Technology 6, no. 4 (July 5, 2012): 426–33. http://dx.doi.org/10.20965/ijat.2012.p0426.
Анотація:
Efforts to save energy have been made in a number of fields due to a shortage of energy resources, such as oil, and a need to protect the earth’s environment. In the field of hydraulics, energy saving pump units are very important because of the energy they consume. At present, a variable displacement-type hydraulic pump units (VD pump unit) and inverter control-type pump units (INV pump unit) are widely used. In this paper, the authors propose using an intermittently operated pump unit coupled with an accumulator (ACC pump unit). First, the electric power consumption, pump output pressure, rotation speed, and efficiency of three types pump units are measured when the same work is done using a modeled machine tool. Next, the load is abstracted to clarify the general characteristics of intermittent work, and the electric power consumption and efficiency of each pump unit are measured. Finally, the static characteristics of each pump unit are measured, and it is verified that the ACC pump unit saves the most energy.
47
Huang, Zhi Qiang, Xue Yuan Li, Gang Zheng, Jian Qiang Xue, and Zhen Chen. "Energy Saving Measures of Oil and Gas Gathering System in Changqing Low Permeable Oilfield." Advanced Materials Research 512-515 (May 2012): 1137–42. http://dx.doi.org/10.4028/www.scientific.net/amr.512-515.1137.
Анотація:
Because of its property of low permeability, low pressure and low production, Changqing low permeable oilfield decreases rapidly in the initial potential stage and has low individual-well producing rate, which give rise to the overestimated oilfield production and large-scale ground construction project of gathering system. Eventually, the problem of “big Marathi car” in oil gathering system generated excessive energy consumption. It is multi-purpose station, pumping station and block station that turn out to be the main energy consumption point, which consume over 90% of system electric energy consumption. Besides, energy like natural gas is dissipated so severely that the utilization ratio of associated gas is less than 30%. This is obtained by analyzing energy distribution of system. For the seriously power-wasting problems in gathering system, energy saving technologies of small power pump replacing large power pump, intermittent pipelining oil by liquid level automatically controlled and double speed adjustment based on frequency control apply to the effective utilization of electric energy, which using oil pumps load rate as energy evaluation criterion. Applying technologies of helical down hole oil-gas separation and oil-gas airtight gathering to recover associated gas effectively gives conspicuous energy saving effect.
48
Текле, Самуэль Исаак, Анатолий Михайлович Зюзев, and Алексей Васильевич Костылев. "IMPROVING SUCKER ROD PUMP EFFICIENCY USING FREQUENCY CONTROLLED INDUCTION MOTOR." Bulletin of the Tomsk Polytechnic University Geo Assets Engineering 333, no. 11 (November 22, 2022): 140–48. http://dx.doi.org/10.18799/24131830/2022/11/3955.
Анотація:
Relevance. In sucker rod pump installations, the cost of the prime mover’s power use has substantial effect on the overall operational cost. Reduction in power consumption can lead to reduction in operating cost. Hence, as the sucker rod pump is dominant in the oil industry, any means which reduces the energy consumption can produce considerable economic benefit and help to meet the energy efficiency targets and standards. Due to the losses in the prime mover, surface transmission, and sucker rod string the power required to lift oil to the surface is always less than the power input to the prime mover. Induction motors, which are widely used as prime movers in sucker rod pump installations, operate at significantly lower efficiency and at a load lower than their rated capacity. Therefore, the demand for efficiency improvement is readily seen. This demand can be achieved by controlling motor losses through AC-DC-AC converter. The main aim of the research is to develop control strategy that helps to operate the sucker rod pump drive at optimal efficiency. Objects: electrical drive, sucker rod pump, oil producing well. Method: integrated simulation model consisting of the models of AC-DC-AC converter, induction motor including iron loss, sucker rod pump; vector control; generation of optimal magnetizing current trajectory for one cycle of pump operation. Result. The energy consumption of sucker rod pump unit for operation at rated flux and the one based on optimal magnetizing current trajectory were compared using an integrated simulation model. The simulation results indicate that about 1,6 % of the required energy can be saved when the sucker rod pump is operated based on the calculated optimal magnetizing current trajectory.
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Dhakal, Dipesh, Nawraj Bhattarai, and Navin Kumar Jha. "Electrical Energy Auditing And Enhanchment of Power System at Basbari Water Treatment Plant, Kathmandu." Journal of Advanced College of Engineering and Management 8, no. 2 (June 23, 2023): 39–53. http://dx.doi.org/10.3126/jacem.v8i2.55941.
Анотація:
The water treatment plant (WTP) employs a variety of electrical machines and utilities, making it an intensive energy consumption plant. In this study, an energy audit was conducted on the Basbari WTP in Kathmandu, Nepal to identify the hotspots that consume most of the energy in the plant and recommend solutions for energy-efficient operation. A power quality analyzer was used to analyze the energy consumption patterns of electrical parameters and data from the electricity authority. The study found that transmission pumps and backwash/makeup pumps consume 77% and 6% of the energy, respectively. Efficient utilization of pump motors could result in an annual cost savings of NRS 160,954.81 from transmission pumps, backwash pumps, and make pumps. The payback period for light replacement and installation of a capacitor bank is 2.16 years and 1.95 years, respectively.
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Ding, De Feng, Shi Jie Liu, Chao Yu Zheng, Wen Sheng Yu, and Wu Chen. "Performance Comparison among Heat Pump Water Heaters Working with R32, R134a and the Mixture of R32/R134a." Advanced Materials Research 512-515 (May 2012): 1295–98. http://dx.doi.org/10.4028/www.scientific.net/amr.512-515.1295.
Анотація:
A general air-source heat pump water heater originally designed to work with R134a was reconstructed as experimental rig for performance studies on systems using different refrigerants including R32, R134a and the mixture of R32/R134a which mass ratio is 1:5. Experimental results showed that the power consumption of the heat pump water heater charged individually with R32 would greatly exceed the system’s original pre-set maximum input power. When the leaving water temperature was increased from 18°C to 58°C, the average discharge temperature of the heat pump charged with R32/R134a mixture was 13.6% higher than that with R134a. The average power consumption of the heat pump with R134a was 253.5W less than that with R32/R134a mixture. However, the average COP (Coefficient of Performance) obtained by that with R32/R134a mixture was 0.83 higher than that with R134a.