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The CFD (Computational Fluid Dynamic) technology was used to investigate the air movement characteristic and aerosol deposition in the human upper respiratory tract. Steady and cyclic respiratory with the breathing intensity of Q = 30 L/min and aerosol diameter of d = 0.3, 6.5 mum were considered. Experimentally validated computational fluid-aerosol dynamics results showed the following: the phenomenon...
Fluorescent lamps are increasingly used in daily life, in which the gas discharge is the lighting principle. Due to the internal nonlinear characteristics of the lamp tube, harmonic currents are produced when the voltage source is directly connected to the lamp. Furthermore, in order to maintain the stable output of the lighting device, the ballast circuit is used. In practice, accurate fluorescent...
Field measurements of voltage and current is the most effective way for characterizing the electric response of an EAF that describe the nonlinear behavior of AC EAF loads. Sufficient measured information can be adopted to develop an appropriate EAF model. In this paper, two classic methods based on measured data, harmonic current injections and equivalent harmonic voltage sources, for the EAF load...
Due to the increasing use of nonlinear loads, the associated power quality (PQ) problems have become a major concern to many electric utilities and their customers. For efficient and accurate analysis, the performance of computer simulation has been recognized as an important and necessary procedure to the power quality study. With the advanced development of computer and communication technologies,...
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