Technical and economic analysis of adjustable electric fan drive with various control systems
DOI:
https://doi.org/10.31548/energiya5(69).2023.148Abstract
In industry, a significant portion of the energy consumed by electric drives is accounted for by variable drive systems of fans, compressors, pumps and other units with cyclic operation. The control systems used create higher harmonics or have a high cost.
The purpose of the study is a comparative analysis of the effectiveness of various electric drive control systems for ventilation systems.
An analysis of the effectiveness of the selected control method was carried out using the principles of electric drive theory, statistical methods for processing research results and methods for determining the economic efficiency of applied research.
The calculation of the efficiency of the development, which is an adjustable electric drive of a ventilation system with pulse-width control, was carried out using a comparative table of technical and economic indicators obtained using a well-known method for determining the economic efficiency of applied research. The basic options are the electric drive of the Klimatica-5 fan unit with a thyristor voltage regulator and an adjustable ventilation system with a frequency converter. Main technical characteristics of the ventilation system: UH=380 V, IН=63 A.
As a result of the research, it was established that the developed adjustable electric drive of the ventilation system with pulse-width control has better economic efficiency compared to an electric drive with a thyristor regulator with phase-pulse control and amounts to 16,391 UAH, and with a frequency electric drive - 18,042 UAH.
The energy savings of a frequency electric drive due to the increased efficiency of the electric drive due to the low efficiency and low power of the motor are insignificant, and the capital costs are much higher compared to an adjustable electric drive based on a thyristor voltage regulator or a regulator with pulse-width control.
Key words: semiconductor voltage converters, frequency converter, pulse-phase control, pulse-width control, adjustable electric drive, axial fan, profit
References
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