scholarly journals Energy Consumption Comparison of a Single Variable-Speed Pump and a System of Two Pumps: Variable-Speed and Fixed-Speed

2020 ◽  
Vol 10 (24) ◽  
pp. 8820
Author(s):  
Safarbek Oshurbekov ◽  
Vadim Kazakbaev ◽  
Vladimir Prakht ◽  
Vladimir Dmitrievskii ◽  
Levon Gevorkov
Keyword(s):  
Energy Consumption ◽  
Induction Motor ◽  
Control Method ◽  
Single Variable ◽  
Variable Speed ◽  
Pump System ◽  
Variable Speed Drive ◽  
Electrical Grid ◽  
Parallel Mode ◽  
Pump Mechanism

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.

Implementation of Variable Speed Drive for Oil-Pump System

2018 ◽  
Vol 879 ◽  
pp. 188-195
Author(s):  
Nattapong Phanthuna ◽  
Somkieat Thongkeaw
Keyword(s):  
Control Method ◽  
Frequency Control ◽  
Control Valve ◽  
Original System ◽  
Original Data ◽  
Pipeline System ◽  
Variable Speed ◽  
Pump System ◽  
Variable Speed Drive ◽  
Oil Pipeline

This paper presents a study of efficiency improvement in the oil pipeline system. Instead of using only control valve, the original system of two oil pumps which have rating of 1,850 kW each is redesigned by using variable speed drive (VSD) technology together with the control valve. This proposed installation method of VSD will be performed to adjust and open the control valve fully at 100%. Furthermore, the frequency control method of the VSD also depends on types of oil. In the efficiency analysis of the oil pipeline system, four types of oil that is JET A1, Disel, B91, and B95 having different density coefficient will be used respectively. The new and the original data acquisition of relationships between transported oil quantity of each type per period and consumed power are compared. From the sequent results, it can be confirmed that this proposed method used to the practical analysis in accordance with Affinity Law can be applied to not only improve the efficiency and also save cost of the power consumption up to 42.96%.

scholarly journals PENGGUNAAN VARIABLE SPEED DRIVE PADA MOTOR INDUKSI UNTUK PENGHEMATAN KONSUMSI ENERGI LISTRIK

2020 ◽  
Vol 22 (2) ◽  
Author(s):  
Abdul Multi ◽  
Ervien Febryane
Keyword(s):  
Energy Consumption ◽  
Energy Saving ◽  
Induction Motor ◽  
Electric Energy ◽  
Variable Speed ◽  
Variable Speed Drive ◽  
Electric Energy Consumption ◽  
Before And After ◽  
Reduction Of Energy Consumption ◽  
Cage Induction Motor

Variable speed drive (VSD) is used not only for controlling the speed but also for saving the electric energyconsumption. In this research VSD is applied to 3 phase squirrel cage induction motor used for water pumping inthe industry. VSD is needed to be applied to induction motors because these motors are the largest electricconsumed. Measurement and calculation are performed in the two conditions, before and after attaching VSD inthe motor. Electric quantities are obtained by measurement in the input and in the output of VSD. While energyconsumption and consumption cost are obtained by calculation. Finally, calculation of energy saving and costsaving are perfomed by comparing those two conditions. Aplication of VSD in the induction motor has advantagesfor saving electric energy consumption dan making it last longer. The energy saving and cost saving per year result1.003.984,8 kWh and IDR 732.908.904 respectlively. The longer life is caused by reduction of energy consumption.

scholarly journals Studi Penggunaan Variable Speed Drive Untuk Pengaturan Kecepatan Motor Exhaust Fan Pada Dyno Test Room PT. Trakindo Utama Pekanbaru

JURNAL TEKNIK ◽  
2018 ◽  
Vol 12 (2) ◽  
pp. 85-96
Author(s):  
Elham Prasetyo Wibowo ◽  
Elvira Zondra ◽  
Usaha Situmeang
Keyword(s):  
Power Consumption ◽  
Induction Motor ◽  
Gas Flow ◽  
Air Flow ◽  
Load Test ◽  
Exhaust Gas ◽  
Variable Speed ◽  
Variable Speed Drive ◽  
Combustion Gas ◽  
Motor Exhaust

                                                                                                                                      ABSTRAK              Exhaust fan adalah peralatan berupa sudu-sudu yang berputar dan memanfaatkan gaya sentrifugal untuk membuang exhaust gas hasil pembakaran bahan bakar solar engine diesel pada saat dilakukan tes pembebanan penuh. Dengan exhaust fan, gas karbondioksida yang dihasilkan oleh engine diesel memungkinkan untuk dibuang dengan cepat sehingga tidak memenuhi ruangan dan membahayakan bagi setiap karyawan. Pengoperasian exhaust fan dilakukan sesuai jadwal pengetesan engine. Exhaust fan tersebut digerakkan oleh motor induksi 3 phasa 30 kW dengan putaran nominal secara konstan. Pada saat pengetesan engine dengan nilai aliran gas buang yang rendah, exhaust fan tetap dioperasikan dengan kecepatan nominal. Operasional motor exhaust fan dengan kecepatan konstan seperti ini akan mengakibatkan konsumsi daya listrik yang relatif tinggi dari pada motor dengan kecepatan berubah-ubah sesuai kebutuhan. Sebagai pertimbangan hasil perhitungan untuk engine C 18 Caterpillar kapasitas 831 hp yang sebelumya  membutuhkan operasional exhaust fan dengan daya 24,7927 kW nilai sama untuk semua model engine, setelah penggunaan VSD dapat dikurangi sebesar 14,35 %  menjadi 21,2343 kW saja. Penelitian ini bertujuan mendapatkan probabilitas hubungan antara konsumsi energi listrik, frekuensi pada variable speed drive, putaran motor induksi dan nilai aliran udara pada cerobong exhaust fan. Nilai aliran udara exhaust fan tersebut akan disesuaikan dengan nilai aliran gas pembakaran yang dihasilkan oleh engine. Analisa optimasi motor exhaust fan ini sedianya akan menggunakan Matematic Analysis dan simulasi menggunakan simulink matlab sehingga diharapkan ada solusi untuk melakukan penghematan terhadap konsumsi daya motor, kemudian bisa diterapkan dalam semua pengoperasian motor yang ada di perusahaan.   Kata kunci : variable speed drive, motor induksi, exhaust fan                                                                                                                                            ABSTRACT              The exhaust fan is a rotary blade device which produces centrifugal force to remove exhaust gas from diesel fuel combustion during a full load test. With exhaust fans, the carbondioxide gases that generated by the diesel engine allows to be disposed quickly so that it does not fill the room and harm to every employee. The operation of  exhaust fan is carried out according to the engine test schedule. The exhaust fan is driven by a 3 phase induction motor of  30 kW with constant rotation. When testing the engine with a low Exhaust Gas flow value, the exhaust fan remains operated at rated speed. Operational exhaust fan with a constant speed like this will result in relatively high power consumption of the motor with the speed of change as needed. Considering the calculation results for C 18 engine Caterpillar capacity of 831 hp which previously required operational exhaust fan with 24,7927 kW of equal value for all engine models, after the use of VSD can be reduced by 14.35% to 21.2343 kW only. This study aims to obtain the probability of relationship between electrical energy consumption, frequency on the variable speed drive, induction motor rotation and the value of air flow in the exhaust fan chimney. The value of the exhaust fan air flow will be adjusted to the combustion gas flow value generated by the engine. The optimization analysis of this motor exhaust fan will be using Matematic Analysis and simulation using matlab simulink so it is expected there is a solution to make savings to motor power consumption, then it can be applied in all the motor operation in the company.   Keywords: variable speed drive, induction motor, exhaust fan

scholarly journals Decision Support System Tool to Reduce the Energy Consumption of Water Abstraction from Aquifers for Irrigation

Water ◽  
2019 ◽  
Vol 11 (2) ◽  
pp. 323 ◽  
Author(s):  
Juan Córcoles ◽  
Rafael Gonzalez Perea ◽  
Argenis Izquiel ◽  
Miguel Moreno
Keyword(s):  
Decision Support ◽  
Energy Consumption ◽  
Decision Support System ◽  
Water Table ◽  
Support System ◽  
Energy Savings ◽  
Variable Speed ◽  
Variable Speed Drive ◽  
Water Abstraction ◽  
Water Table Level

In pressurized irrigation networks that use underground water resources, submersible pumps are one of the highest energy consumers. The objective of this paper was to develop a decision support system, implemented in MATLAB®, to reduce the energy consumption of the water abstraction process, from an aquifer to a reservoir in existing wells, by installing a frequency speed drive. An economic module with the aim to assess the economic profitability of the investment cost of the variable speed drive was also developed. This tool was used in three wells that were located in the Eastern Mancha Aquifer. Several scenarios and irrigation seasons were analyzed while considering the interannual and annual variation in ground water depth. In the three analyzed irrigation societies (named A, B, and C), energy savings were achieved using a variable speed frequency when compared with fixed speed. Considering the analyzed cases, when the dynamic water table level is higher, energy savings ranged from 4.4% and 24.4%, using a variable speed ratio of 0.9 and 0.82. The energy savings based on the variable speed frequency increased when the dynamic water table level was lower, with the average energy savings close to 23%, 22% and 6.8% for irrigation societies A, B, and C, respectively. The results also show that the investment costs of the variable speed drive in two of the three irrigation societies studied were highly profitable, with a payback that ranged from 4.5 to 10 years.

Computer-Controlled Induction Motor Drive for Teaching Purposes

1993 ◽  
Vol 30 (1) ◽  
pp. 77-87
Author(s):  
J. F. Gieras ◽  
H. H. Buhlmann
Keyword(s):  
Induction Motor ◽  
Digital Computer ◽  
Closed Loop ◽  
Motor Drive ◽  
Induction Motor Drive ◽  
Variable Speed ◽  
Variable Speed Drive ◽  
Squirrel Cage ◽  
Load Characteristics ◽  
Computer Controlled

Computer-controlled induction motor drive for teaching purposes A digital-computer-controlled variable-speed drive with 1.5 kW induction motor has been designed. The commercial squirrel cage as well as solid steel rotors have been applied. The load characteristics for speed control (open and closed-loop) have been presented and discussed.

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