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Wyszukujesz frazę "motor-pump" wg kryterium: Temat


Tytuł:
Study of ancestral irrigation systems in the oasis of Taghit in the South West of Algeria
Autorzy:
Belhadj Elmehdi, Elhadj
Remini, Boualem
Rezzoug, Cherif
Hamoudi, Saaed
Powiązania:
https://bibliotekanauki.pl/articles/293231.pdf
Data publikacji:
2020
Wydawca:
Instytut Technologiczno-Przyrodniczy
Tematy:
foggara
motor pump
oasis
source
Taghit
Opis:
The unique oasis of Zousfana, on the western edge of the Grand Erg Occi-dental, Taghit is the pearl of the oases of Saoura, a palm grove of 180 ha over an 18 km length crossed by Oued Zouzfana. It regroups the different types of landscapes of an arid zone (erg, hamada, barga – a small hill, oued ...). Taghit is known for its hydraulic civilization, the oasis in its hostile environment has survived thanks to the exploitation of rare groundwater irrigation according to the traditional customs applied to the whole of society. The peasants spur out the water resources through foggaras and traditional wells. But the intervention of modern irrigation techniques in an anarchic way has disrupted the fragile mode of irrigation and the abandonment of the palm grove. The over-exploitation of groundwater by the use of boreholes and motor pumps leads to the drying up of water sources, mists and traditional wells. Today, only 45 000 palm trees are productive and less than 1500 fruit trees. There are 500 fellahs in the entire agricultural area of Taghit, the majority of them is fleeing work in the oasis because of the lack of income from it. When comparing the results of analyses from different campaigns (2015 and 2008), a spectacular increase in the salt concentrations in the groundwater of the different palm groves is noticed. According to our investigations, the main causes of this jump are: the overexploitation of the water tables by motor pumps, the abandonment of land inside the palm grove, the lack of maintenance of the gardens, the exploitation of domestic wastewater in the irrigation. According to this preliminary study, it is important for the State to make farmers aware of the role of their traditional irrigation systems in the continuity of the oasis and life in it.
Źródło:
Journal of Water and Land Development; 2020, 44; 13-18
1429-7426
2083-4535
Pojawia się w:
Journal of Water and Land Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Single sensor based photovoltaic maximum power point tracking technique for solar water pumping system
Autorzy:
Daoud, A.
Midoun, A.
Powiązania:
https://bibliotekanauki.pl/articles/262763.pdf
Data publikacji:
2008
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
Tematy:
MPPT
boost converter
rmicrocontroller
DC motor-pump
flow rate
Opis:
The development of photovoltaic (PV) panels has made solar-powered pumps a reality. The pump drivers are usually direct-current (DC) motors which are fed by power electronic converters with maximum power point tracking (MPPT) to extract the whole energy that the PV panels can generate depending on the environmental conditions including irradiation and temperature. The implementation of MPPT algorithm essentially involves sensing both an input current and an input voltage. Understandably, such realization is expensive. In this paper, a solar PV water pumping system based on DC to DC converter as MPPT module is considered. The system consists of a PV array, a DC to DC boost converter and the DC motor coupled to a centrifugal pump. A proposed method is employed to seek the maximum power point using the flow rate obtained from a single sensor. A comparison with conventional hill climbing technique is included in experimental results to prove feasibility of the proposed method.
Źródło:
Electrical Power Quality and Utilisation. Journal; 2008, 14, 2; 69-72
1896-4672
Pojawia się w:
Electrical Power Quality and Utilisation. Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study of Single Sensor Based Maximum Power Point Tracking Techniques for Solar Water Pumping System
Autorzy:
Daoud, A.
Midoun, A.
Powiązania:
https://bibliotekanauki.pl/articles/262773.pdf
Data publikacji:
2009
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
Tematy:
MPP
buck converter
microcontroller
motor-pump
tachometer
pressure sensor
Opis:
This paper describes new techniques of maximum power point (MPP) tracking for solar water pumping system. The latter system consists of a PV array, a DC/DC buck converter and a universal motor coupled to a centrifugal pump. A conventional hill climbing method is employed to seek the MPP using the motor-pump rotation speed or the pump outlet pressure information. Experimental results are presented and a comparison with conventional algorithm which requires both voltage and current sensors is provided.
Źródło:
Electrical Power Quality and Utilisation. Journal; 2009, 15, 2; 23-27
1896-4672
Pojawia się w:
Electrical Power Quality and Utilisation. Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Simulation of vehicle working conditions with hydrostatic pump and motor control algorithm
Autorzy:
Zavadinka, P.
Kriššák, P.
Powiązania:
https://bibliotekanauki.pl/articles/385112.pdf
Data publikacji:
2012
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
hydrostatic pump and motor
control algorithm
mobile working machine
energy savings
Opis:
Emission rules have significant impact on market of mobile working machines. They bring new challenges for transmission, working, controlling and vehicle management functions. Extensive knowledge from design, control system, optimization, automation, signal processing, system modeling etc. are welcome to get answer how best to produce more efficient, productive machines. In case of new concepts is appropriate to create complex dynamic model of machine. Presented paper describes a four wheel drive model and simulation of a mobile working machine and the concept of hydrostatic pump and motor control algorithm in selected conditions.
Źródło:
Journal of Automation Mobile Robotics and Intelligent Systems; 2012, 6, 3; 40-46
1897-8649
2080-2145
Pojawia się w:
Journal of Automation Mobile Robotics and Intelligent Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Diagnostyka drgań spiralnych wirnikowych maszyn elektrycznych
Diagnostics of spiral vibrations in rotating electric machinery
Autorzy:
Ashley, P.
Miałkowski, P.
Nowicki, R.
Powiązania:
https://bibliotekanauki.pl/articles/1199630.pdf
Data publikacji:
2017
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Napędów i Maszyn Elektrycznych Komel
Tematy:
stan techniczny
drgania spiralne
elektro-pompa
turbo-generator
technical condition
spiral vibrations
electric motor driven pump
turbine-generator
Opis:
This paper describes examples of inference about rotating electrical machinery technical condition for situations when spiral vibrations happen. Analysis of these vibrations allows quickly formulated diagnosis of root cases of a problem, and if the malfunction results in the shutdown it can reduce the time an asset is out of operation. Examples of problems relating to electric motor driven a main oil line pump and 4-pole generators are discussed.
Omówiono przykłady wnioskowania o stanie technicznym wirnikowych maszyn elektrycznych w przypadku wystąpienia drgań spiralnych. Analizy drgań typu APHT NX pozwalają na szybkie postawienie poprawnej diagnozy, co umożliwia skrócenie czasu awaryjnego odstawienia agregatu krytycznego, jeśli jest ono niezbędne. Pokazano przykłady drgań spiralnych dla silnika asynchronicznego napędzającego pompę główną linii przesyłowej ropy oraz generatora 4-biegunowego.
Źródło:
Maszyny Elektryczne: zeszyty problemowe; 2017, 1, 113; 177-182
0239-3646
2084-5618
Pojawia się w:
Maszyny Elektryczne: zeszyty problemowe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Determining the optimal working point and the loading characteristic of synchronous machine for fan and pump drive system
Autorzy:
Nowak, L.
Kowalski, K.
Stachowiak, D.
Mikołajewicz, J.
Pietrowski, W.
Radziuk, K.
Powiązania:
https://bibliotekanauki.pl/articles/97525.pdf
Data publikacji:
2011
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:
synchronous motor
electric motor
pump drives
Opis:
In the paper the computer software for determining the optimal working point of electric motors for fan (and pump) drive systems is presented. The main use of this software is the preliminary designing of permanent magnet synchronous motor for such type of drives. The second task of the software is determining the load characteristic of the fan system (pump system), i.e. relationship between loading torque and angular speed. The obtained characteristics can be used in the designing of control system for fan or pump drives.
Źródło:
Computer Applications in Electrical Engineering; 2011, 9; 139-149
1508-4248
Pojawia się w:
Computer Applications in Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Energy loss coefficients ki in a displacement pump and hydraulic motor used in hydrostatic drives
Autorzy:
Maczyszyn, Agnieszka
Powiązania:
https://bibliotekanauki.pl/articles/259211.pdf
Data publikacji:
2019
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
hydrostatic drive
energy loss rate
pump
hydraulic motor
energy loss coefficients
Opis:
The article aims at defining and analysing the energy loss coefficients in design solutions of rotating displacement machines, with a piston machine as an example. The energy losses observed in these machines include mechanical loss, volumetric loss, and pressure loss. The scale and relations between these losses in different machines depend on machine design and manufacturing quality, and on operating parameters. The operating parameters, in turn, which affect directly or indirectly the above losses depend on whether the machine works in pump or hydraulic motor regime. The article is also a contribution to the development of a library of ki coefficients which define the losses in displacement machines, as the knowledge about these coefficients makes it possible to assess fast and easily the energy efficiency of a machine or drive system at each point of its working area.
Źródło:
Polish Maritime Research; 2019, 3; 47-55
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of Single-Phase Voltage Loss and Load Carrying Mode on Mine Drainage Pump Motor in Vietnam
Autorzy:
Do, Nhu Y.
Ngo, Xuan Cuong
Powiązania:
https://bibliotekanauki.pl/articles/2020166.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Przeróbki Kopalin
Tematy:
mine drainage pump
single-phase voltage loss
asynchronous motor
harmonics
górnictwo
pompy
drenaż
Opis:
Mine drainage pump is the most important load in mining which requires high reliability when operating. Currently, the power supply of a mine drainage pump is connected to the same power line with many nonlinear loads, and is equipped with power electronic converters, which makes the power supply nonsinusoidal. During the working process of a mine drainage pump, the load-carrying factor often changes, and many types of failures occur, among which single-phase voltage loss is the most common problem. In the case of a nonsinusoidal power supply, if a single-phase voltage loss occurs in different load modes, it will greatly affect the working mode of the mine drainage pump leading to influences on the working efficiency, the life of the pump, and sometimes it is necessary to recalculate the protection parameters. This paper studies the influence of single-phase voltage loss and load carrying mode on the working mode of mine drainage pump motor in case the of nonsinusoidal power supply. Research results show that, in the case of nonsinusoidal power supplied with single-phase voltage loss, copper losses in the rotor and stator circuits increase with increases in voltage total harmonic distortion (THD) and load-carrying factor, 5th order reverse harmonic increases copper loss in asynchronous motor the most, and higher harmonic components have less effect on copper loss in the motor. At the same time, the speed ripple decreases with the increase of the motor load factor and decreases in the presence of the 5th order negative sequence harmonic, and increases significantly in the presence of the 7th order positive sequence harmonic. 5th order negative sequence harmonic increases, the torque ripple increases, while the 7th order positive sequence harmonic reduces the torque ripple in the case of single-phase voltage loss. The results of the paper will help improve the operational efficiency of the mine drainage pump in Vietnam's mines.
Źródło:
Inżynieria Mineralna; 2021, 2; 341--352
1640-4920
Pojawia się w:
Inżynieria Mineralna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Multi motor neural PID relative coupling speed synchronous control
Autorzy:
Zhang, Yonglong
An, Yuejun
Wang, Guangyu
Kong, Xiangling
Powiązania:
https://bibliotekanauki.pl/articles/141259.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
fuzzy control
multi motor synchronous control
neural PID
relative coupling control
vacuum pump
Opis:
When the traditional multi-motor speed synchronous control strategy is applied to the vacuum pump system, it is prone to the drawbacks of large synchronization error. In this paper, a simplified mathematical model of the motor for a vacuum pump is established and the transfer function is introduced, which weakens the multivariable, strong coupling and nonlinear characteristics of the motor system. According to the basic principle of the relative coupling control strategy, the neural network Proportion Integration Differentiation (PID) is introduced as a speed compensator in this system. It effectively improves the synchronization and anti-interference ability of the multi motor
Źródło:
Archives of Electrical Engineering; 2020, 69, 1; 69-88
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Oil pressure distribution in conical ring gaps
Rozklady cisnienia oleju w szczelinach pierscieniowych stozkowych
Autorzy:
Zloto, T.
Kowalski, K.
Powiązania:
https://bibliotekanauki.pl/articles/793712.pdf
Data publikacji:
2012
Wydawca:
Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:
piston-cylinder pump
pressure distribution
oil pressure distribution
conical ring gap
piston pump
hydraulic motor
Navier-Stokes equation
viscosity
hydraulic system
computational model
Źródło:
Teka Komisji Motoryzacji i Energetyki Rolnictwa; 2012, 12, 2
1641-7739
Pojawia się w:
Teka Komisji Motoryzacji i Energetyki Rolnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Detailed Energy Audit of Thermal Power Plant Equipment
Autorzy:
Das, Sourabh
Mukherjee, Mainak
Mondal, Surajit
Powiązania:
https://bibliotekanauki.pl/articles/1193916.pdf
Data publikacji:
2015
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Energy Audit
Energy Conservation
Lighting Audit
Motor Audit
Pump Audit
Thermal Power Plant
Transformer Audit
Opis:
Energy audit is a technique developed to reduce unnecessary usage of energy, control and also streamline processes leading to energy efficiency. Energy audit and its impact on a daily basis is high and hence is of good significance. Energy Conservation over the years has been a key in terms of saving excessive bills and building up unnecessary usage both domestically and industrially. The world is not completely energy efficient yet, it should be a made sure that the process to ensure optimum usage and saving wherever possible. In this paper we shall discuss in brief about energy audit in a thermal power plant, techniques and ways data are obtained. India’s strive for complete energizing is yet on the verge of completion, need for saving unused energy and also recovering waste energy can be beneficial in developing an energy content environment. The energy audit carried out in thermal power plant gives a presentation of the data and corners of collecting data.
Źródło:
World Scientific News; 2015, 22; 70-90
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Graphical interpretation of the power of energy losses and power developed in the hydrostatic drive and control system elements
Autorzy:
Skorek, G.
Powiązania:
https://bibliotekanauki.pl/articles/259894.pdf
Data publikacji:
2012
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
hydraulic motor
energy balance
energy losses
energy efficiency
capacity pump
hydraulic servomechanism
hydrostatic drive system
Źródło:
Polish Maritime Research; 2012, 4; 44-53
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of the structural and total energy efficiency of selected hydraulic systems with proportional control linear motor
Autorzy:
Skorek, G.
Powiązania:
https://bibliotekanauki.pl/articles/247433.pdf
Data publikacji:
2016
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
energy efficiency
power of losses
hydrostatic system
throttling steering
pump
hydraulic linear motor
proportional directional valve
Opis:
In the paper are presented the diagrams of the structural energy efficiency of system with the throttling control assembly and total energy efficiency of the system with constant or variable capacity pump cooperating an overflow valve with the throttling control of the linear hydraulic motor. Diagrams of total energy efficiency of three hydraulic systems working at the same parameters of speed and load of hydraulic linear motor, which were different due to structure and ability of energy saving were presented and compared. This publication also presents analyses and compares the areas of the power fields of energy losses occurring in the elements of three compared hydraulic systems with different structures of the hydraulic linear motor speed control on example on Load Sensing system. The graphical interpretation of the power of losses in the hydrostatic drive and control system elements lets to compare the same power fields of energy losses with other power fields of another structure. This enables to understand what energy losses are the biggest and in which elements of compared hydraulic systems. The best possibility to use in system, as a supply source of the hydraulic cylinder speed series throttling control assembly, is a set consisting of a variable capacity pump cooperating with a Load Sensing (LS) regulator, which totally eliminates the structural volumetric losses in a system. Power ΔPstv of structural volumetric losses is equal to zero, because the current pump capacity QP is adjusted, by the LS regulator, to the current flow intensity QM set by the throttling assembly.
Źródło:
Journal of KONES; 2016, 23, 2; 317-324
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence the applied control structure on energy efficiency of the hydrostatic system
Autorzy:
Skorek, G.
Powiązania:
https://bibliotekanauki.pl/articles/245430.pdf
Data publikacji:
2018
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
energy efficiency
power of losses
hydrostatic system
throttling steering
pump
hydraulic linear motor
proportional directional valve
deck machinery
Opis:
A control system with a proportional directional throttling control valve or a directional control servo valve, controlling a cylinder (linear hydraulic motor) is used in the ship steering gear drive, in the controllable pitch propeller control, in the variable capacity pump control system for hydraulic deck equipment motors or fixed pitch propellers in small ships (for example ferries). The hydraulic system is designed first of all taking into consideration the nominal parameters of the cylinder load and speed. For such parameters, the energy efficiency of the elements and complete system is described. Meanwhile the exploitation conditions can vary in full range changes of the cylinder load and speed coefficients. The article presents a comparison of the energy behaviour of two widespread structures of hydrostatic systems: a standard individual systems with a throttling steering fed by a constant capacity pump. Both hydraulic solutions are described and equations of the total efficiency η of the system are presented. Diagrams of energy efficiency of two hydraulic systems working at the same parameters of a speed and a load of hydraulic linear motor, which were different due to structure are presented and compared, as well ability of energy saving. This publication also presents analyses and compares the areas of the power fields of energy losses occurring in the elements of two hydraulic systems with different structures of the hydraulic linear motor speed control.
Źródło:
Journal of KONES; 2018, 25, 3; 411-418
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wykorzystanie charakterystyki SCL w diagnostyce agregatów łożyskowanych ślizgowo
Aplication of SCL Analysis in Diagnostic Process of Aggergates with Journal Bearings
Autorzy:
Popálený, P.
Nowicki, R.
Powiązania:
https://bibliotekanauki.pl/articles/1368028.pdf
Data publikacji:
2015
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Napędów i Maszyn Elektrycznych Komel
Tematy:
stan techniczny
zmiana położenia czopów
osiowanie
silnik
pompa
APHT NX
technical condition
shaft centreline position change
alignment
electric motor
pump
Opis:
This paper describes possibilities of usage of shaft centerline position data for evaluation of alignment correctness. There are described shapes of typical characteristics for chosen journal bearings and shown relationships between the considered data format and other dynamic characteristics used in technical diagnostics.
W artykule omówiono możliwości wykorzystywania charakterystyk zmiany położenia czopów na rzecz oceny poprawności osiowania. Opisano typowe kształty tych charakterystyk dla wybranych typów łożysk oraz pokazano uzależnienia między tym formatem danych, a innymi wybranymi charakterystykami dynamicznymi wykorzystywanymi w diagnostyce technicznej.
Źródło:
Maszyny Elektryczne: zeszyty problemowe; 2015, 1, 105; 155-161
0239-3646
2084-5618
Pojawia się w:
Maszyny Elektryczne: zeszyty problemowe
Dostawca treści:
Biblioteka Nauki
Artykuł

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