Abstract
The authors have been researching the effect of polyharmonic currents (complex waveform current) on the characteristics of different types of radiators for a few years. These researches have shown an increase in the energy efficiency of installations with dark and light radiators and the ability to control the harmonic composition of radiation. It is important considering the need to harmonize the frequency characteristics of a radiator with the frequency response of an energy absorbing surface. The object of experimental research are flexible heating tape and installations with dark radiators and their joint operation modes when powered by complex waveform current from a common power source. The purpose of the work is the definition of characteristics of the flexible heating tape and dark infrared radiators when changing the amplitude and frequency of the supply voltage to develop recommendations for the selection of effective modes.
Highlights
The problems of electric energy losses reduction and improving the efficiency of electric grid complex are priority direction of the Russian Federation state policy
Various devices for electric heating are used in oil refineries: submersible heaters, flange submersible heaters, flow electric heaters, duct air heaters
This paper presents the researches results of joint operation of installations with infrared radiators and electric heating systems when powered by complex waveform current (CWC) from a common source
Summary
The problems of electric energy losses reduction and improving the efficiency of electric grid complex are priority direction of the Russian Federation state policy. In [1, 2, 3] it is proved that the losses of electrical energy in overhead lines depend on the temperature: temperature is important factor determining the loadpower losses in overhead lines. In [4, 5] it is determined that in electric industrial networks the increased power and energy losses is due to higher current harmonics when the share of nonlinear load increases. An increased load on neutral wire in three-phase electric networks with asymmetric and nonlinear consumers leads to a phase misalignment in voltage and termination of power supply [6, 7]. Application of the skin-system - core inductors and induction-resistive heating system (IRHS) required the development of calculation methods of power losses in alternating magnetization of steel at a frequency of 50Hz, that is, the hysteresis loss [9]
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