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RESEARCH POTENTIAL OF ENERGY SAVING PUMP UNIT AND HYDRAULIC
NETWORK
Usmonov Sh.Yu.1, Sultonov R.A.2, Kuchkarova D.T.3 Em ail: [email protected]
'Usmonov Shukurillo Yulbarsovich — PhD, Vice Rector;
2Sultunov Ruzimatjohn Anvarjohn o 'g 'li - Teacher;
3Kuchkarova Dilnoza Toptievna - Senior Teacher, DEPARTMENTELECTROTECHNICS, ELECTROMECHANICS, ELECTROTECHNOLOGY, POWER ENGINEERING FACULTY, FERGHANA POLYTECHNIC INSTITUTE, FERGHANA, REPUBLIC OF UZBEKISTAN
Abstract: the article under discussion studied the analysis of energy saving potential of pumping unit and hydraulic network of chemical productions with adjustable drives. The highest potential of energy saving, due to the continuous operation mode and mass application, have production mechanisms and units operating in a continuous mode with changing productivity. They are used practically in all branches of industrial and chemical production, municipal enterprises. When regulating the flow of electrical energy, energy saving is achieved and at the same time the working life of the equipment is extended and the need for mechanical regulating devices is eliminated completely or partially. Such a solution is universal and allows to significantly reduce energy consumption in various branches of industrial production: chemical, petrochemical, metallurgical, machine-building, food, transport enterprises, as well as municipal heating, water supply and sewerage systems.
Keywords: pump, fan, compressor, hydraulic network, pressure, network frequency, adjustable electric drive, efficient pump installation.
исследование потенциала энергосбережения насосного
АГРЕГАТА И ГИДРАВЛИЧЕСКОЙ СЕТИ Усмонов Ш.Ю.1, Султонов Р.А.2, Кучкарова Д.Т.3
'Усмонов Шукурилло Юлбарсович - PhD, проректор;
2Султонов Рузиматжон Анваржон угли — преподаватель;
3Кучкарова Дилноза Топтиевна - старший преподаватель, кафедра электротехники, электромеханики, электротехнологии, факультет энергетики, Ферганский политехнический институт, г. Фергана, Республика Узбекистан
Аннотация: в статье дается анализ потенциала энергосбережения насосного агрегата и гидравлической сети химических производств с регулируемыми приводами. Наиболее высоким потенциалом энергосбережения, ввиду продолжительного режима работы и массового применения, обладают производственные механизмы и агрегаты, работающие в продолжительном режиме с изменяющейся производительностью. Они используются практически во всех отраслях промышленного и химического производства, коммунальных предприятиях. При регулировании потока электрической энергии, достигается энергосбережение и одновременно продлевается рабочий ресурс оборудования; при этом устраняется полностью или частично необходимость в механических регулирующих устройствах. Такое решение универсально и позволяет существенно снизить расход энергии в различных отраслях промышленного производства: химической, нефтехимической, металлургической, машиностроительной, пищевой промышленности, предприятиях транспорта а также коммунальных системах теплоснабжения, водоснабжения и канализации. Ключевые слова: насос, вентилятор, компрессор, гидравлическая сеть, напор, частота сети, регулируемый электропривод, эффективная насосная установка.
UDC 621.34
Due to the long operating mode and mass use, the highest potential for energy saving is possessed by production mechanisms and units operating in a continuous mode with changing productivity. They are used in almost all sectors of industrial and chemical production, utilities. These include: pumps, smoke exhausters and fans of boiler plants, cooling tower fans, reciprocating compressors.
The vast majority of the listed mechanisms and units are equipped with asynchronous squirrel-cage electric motors. The simplicity of their design and relatively low cost are combined with low performance indicators, such as the inability to control the speed when the engine is powered directly from the network and the consumption from the network of not only active, but also reactive power. Significant disadvantages of squirrel-cage induction motors include a large starting current, which is 67 times higher than the nominal value of the stator current.
Frequency converters allow you to widely vary the speed of asynchronous motors (recent generations of inverters allow you to control synchronous motors) and, thanks to this, control the performance of the mechanisms and assemblies they bring. Since the flow of electric energy is regulated in them, energy saving is achieved and at the same time the working life of the equipment is extended; this eliminates all or part of the need for mechanical control devices. This solution is universal and can significantly reduce energy consumption in various sectors of industrial production: chemical, petrochemical, metallurgical, machine-building, food, transport enterprises as well as public heating, water and sewage systems.
The greatest effect of energy saving is achieved in the electric drive of centrifugal mechanisms. For this class of centrifugal mechanisms, the performance Q when running on a network without a static pressure component is proportional to the speed of rotation of the turbo mechanism, and the pressure Н developed by the turbo mechanism is proportional to the square of the speed of rotation, therefore it is obvious that the power Pc and the electric power Wc consumed by the electric drive proportional to the rotation speed in the third degree [1,2].
It follows that if it is possible to reduce the frequency of the voltage on the motor from 50 Hz to at least 40 Hz in the process of controlling the performance of a centrifugal pump while feeding a drive electric motor from the converter, then in this case the energy consumption is almost halved, since the consumption is proportional frequency ratio cubes. In this case, this is (40/50) 3 = 0,512.
The main characteristic of centrifugal pumps is the dependence of the developed head H on the capacity Q. These dependences are presented, as a rule, in the form of QH graphs (pressure characteristics - Figure 1) for various rotation speeds of the mechanism, which for a particular application should be considered together with the characteristics of the hydraulic network . In figure 2 shows the hydraulic characteristics of the network with a fully (1) and partially open (2) throttle, obtained experimentally.
P, kB 140 120 100 80 60 40
20 ^ ___^^_
110 15 20 25 30 35 40 45 I. Tu
Fig. 1. The dependence of the power consumption P of the pump motor on the frequency IF output voltage FT, M &M CT. 70
60 50 40 30 20 10
80 120 160 200 240 2*0 320 360 Q.<
Fig. 2. Characteristics of the hydraulic circuit (1) of the throttle circuitregulation (2) and the pump when changing
the frequency
When constructing these characteristics, it was taken into account that the pump capacity Q is proportional to the rotation speed ю, and the pressure Н is proportional to the square of the rotation speed. The intersection points of the pressure characteristic with the network characteristics determine the operation mode of the pump in conjunction with the line.
References / Список литературы
1. Usmonov Sh.Yu. Frequency-Controlled Asynchronous Electric Drive with Extreme Control for Fan Load // International Journal of Advanced Research in Science, Engineering and Technology. India, 2017. Volume 4. Issue 10, Pages: 4633-4642. [Electronic Resource]. URL: https://pdfs.semanticscholar.org/9dcd/bbd04bdf8bdb97938528d640fb8258d7a36e.pdf/ (date of access: 28.11.2019).
2. Usmonov S. Optimization of the Launching Process in the Electric Drive with the Help of Genetic Algorithm. Machine Learning Research. Vol. 2. № 2, 2017. P.p. 61-65. Doi: 10.11648/j. mlr.20170202.13. [Electronic Resource]. URL: http://www. sciencepublishinggroup.com/j ournal/paperinfo?journalid=604&paperId= 10021101/ (date of access: 28.11.2019).
3. Usmonov Sh.Yu. Optimization of Frequency-Controlled Asynchronous Electric Drive for Ventilatory Loading. Science Research. Vol. 5. № 4, 2017. Pp. 50-56. doi: 10.11648/j.sr.20170504.11.
4. Sultonov R.A., Kodirov Kh.M., Mirzaliyev B.B. Vybor mekhanicheskikh dvigateley elektricheskogo toka, ispol'zuyemykh v sisteme elektroprivoda // Problemy nauki, 2019. № 11-2 (144). [Electronic Resource]. URL: https://cyberleninka.ru/article/n/vybor-mehanicheskih-dvigateley-elektricheskogo-toka-ispolzuemyh-v-sisteme-elektroprivoda/viewer/ (date of access: 28.11.2019).
ИССЛЕДОВАНИЕ ИСПОЛЬЗОВАНИЯ АСИНХРОННЫХ МАШИН ПРИ УМЕНЬШЕНИИ ЭНЕРГЕТИЧЕСКИХ ПОТЕРЬ Мухаммаджонов М.Ш. Email: [email protected]
Мухаммаджонов Мухаммадюсуф Шухрат угли — преподаватель, кафедра электротехники, электромеханики, электротехнологий, факультет энергетики, Ферганский политехнический институт, г. Фергана, Республика Узбекистан
Аннотация: в настоящее время трудно представить индустриально развитую мировую экономику без производства. Производства включают в себя небольшие фирмы и крупные предприятия. В настоящее время наиболее широко используемым видом энергии на промышленных предприятиях является электроэнергия. Одним из основных потребителей электроэнергии на промышленных предприятиях являются электрические двигатели. Потери в электродвигателях сравниваются с общими потерями при передаче и распределении электроэнергии. Поэтому меры по энергосбережению на двигателях всего предприятия могут быть рентабельными.
Ключевые слова: производство, предприятие, индустриальный, энергия, развитый, промышленный, цех, двигатель, рентабельный, электрическая система.
STUDY OF THE USE OF ASYNCHRONOUS MACHINES WITH REDUCED ENERGY LOSSES Mukhammadjohnov M.Sh.
Mukhammadjohnov Mukhammadyusuf Shukhrat o 'g 'li — Teacher, ELECTRIC ENGINEERING, ELECTRIC MECHANICS AND ELECTRIC TECHNOLOGIES DEPARTMENT,
POWER ENGINEERING FACULTY, FERGHANA POLYTECHNIC INSTITUTE, FERGHANA, REPUBLIC OF UZBEKISTAN
Abstract: аt present it is difficult to imagine an industrially developed world economy without production. Production includes small firms and large enterprises. Currently, the most widely used
