ANALYSIS OF ELECTRICITY CONSUMPTION OF INDUCTION MOTORS OF IE1 AND IE2 EFFICIENCY CLASSES IN A 11 kW PUMP INSTALLATION

Oshurbekov, Safarbek; Kazakbaev, Vadim; Prakht, Vladimir; Dmitrievskii, Vladimir; Paramonov, A. S.

doi:10.20998/2074-272x.2020.5.03

Cited by 3 publications

(1 citation statement)

References 4 publications

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“…In the article [45], an analysis was performed for a pumping unit with direct power supply from the mains, with a power of 11 kW and two IMs of energy efficiency classes IE1 and IE2. The payback periods (see Section 5) of replacing an electric motor of class IE1 with an electric motor of IE2 class were calculated.…”

Section: Introductionmentioning

confidence: 99%

Feasibility Study of Pump Units with Various Direct-On-Line Electric Motors Considering Cable and Transformer Losses

et al. 2020

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The high energy intensity of the modern industry determines the high urgency of increasing the energy efficiency of production processes. However, a big number of motor types of enhanced efficiency classes are available on the market. The motor users can be confused about the choice of the right motor solution for a certain application. In this paper, to help with this choice the energy efficiency indicators of various types of electric motors in a low-power pump unit with a constant rotation speed are studied. Moreover, not only power losses in the motor are considered, but also power losses in the cable and transformer, which are influenced by the power factor of the motor. Induction motors (IMs) and synchronous motors powered directly from the grid (direct-on-line synchronous motor with permanent magnet in the rotor, DOL PMSM; direct-on-line synchronous reluctance motor without permanent magnet, DOL SynRM) of IE2, IE3, and IE4 energy efficiency classes are compared. To carry out the analysis, polynomial interpolation of the available catalogue data and experimental data of the motors are used. The main criteria for comparing different motors in this work are the energy savings over the pump’s life cycle and the payback period when replacing an IE2 motor with a motor of a higher energy efficiency class. The article shows that although the DOL PMSM has a lower motor efficiency than the DOL SynRM, it saves more energy due to its higher power factor, which reduces cable and transformer losses. It is also shown that, despite the highest initial cost, when taking into account cable and transformer losses, the payback period of DOL PMSM can be shorter than that of IE3 and IE4 induction motors. DOL SynRM has the shortest payback period in all considered cases, has no troublesome rare-earth permanent magnets, and can also be a valuable solution.

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Section: Introductionmentioning

confidence: 99%

Feasibility Study of Pump Units with Various Direct-On-Line Electric Motors Considering Cable and Transformer Losses

et al. 2020

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Comparison of the Energy Efficiency of Induction and PMSM Electric Drives with a 7.5 kW Output Power for Ventilation Systems

Hulyy

2023

2023 IEEE 5th International Conference on Modern Electrical and Energy System (MEES)

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Analysis of the payback period of a modernized pump unit with induction electric motors of advanced energy efficiency classes

Goman¹,

Prakht²,

Kazakbaev³

et al. 2021

Electrical Engineering & Electromechanics

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Aim. The comparative analysis of energy consumption, electricity costs during lifetime cycle and payback period of a pump unit with 90 kW 2-pole induction motors, belonging to various energy efficiency classes, feeding directly from power grid. Methods. The examined operating modes aligned with a typical operating cycle of a pump unit with approximately constant flow rate of 75-110 % of the rated flow. The calculations were based on the pump and induction motors nameplate data, which, in their turn, were based on the manufacturers’ experimental data. Results. The calculations of energy consumption, electricity costs and payback periods of a pump unit with 90 kW 2-pole induction motors, feeding directly from power grid have been performed in the article. The application of induction motors belonging to IE2, IE3 and IE4 energy efficiency classes has been discussed. Practical value. It has been demonstrated, than in case of replacement of an induction motor of energy efficiency class IE2 due to planned retrofit, payback period for an IE4 induction motor is 2.18 years, energy savings within a calculated 20-year operating period are 268MW·h, which makes €41110 in money terms. Under the same conditions, the replacement of an induction motor of energy efficiency class IE2 with an induction motor of energy efficiency class IE3 will allow to save 88 MW·h within a calculated operating period, which, expressed in monetary terms, is €13500 and the payback period is 5.11 years. Thus, the article proves that despite a higher initial price, the choice of an induction motor of energy efficiency class IE4 tends to be more economically advantageous.

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ANALYSIS OF ELECTRICITY CONSUMPTION OF INDUCTION MOTORS OF IE1 AND IE2 EFFICIENCY CLASSES IN A 11 kW PUMP INSTALLATION

Cited by 3 publications

References 4 publications

Feasibility Study of Pump Units with Various Direct-On-Line Electric Motors Considering Cable and Transformer Losses

Feasibility Study of Pump Units with Various Direct-On-Line Electric Motors Considering Cable and Transformer Losses

Comparison of the Energy Efficiency of Induction and PMSM Electric Drives with a 7.5 kW Output Power for Ventilation Systems

Analysis of the payback period of a modernized pump unit with induction electric motors of advanced energy efficiency classes

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