Overspray sediments settling on the recuperator's fins cause operational problems. The cross sections of the recuperator's channels gradually decrease and finally it result in clogging of the recuperator. The layers of sediments cause air flow resistance and also heat transfer resistance. The paper presents preliminary results of sedimentation process modeling. The model of overspray creation takes into account a droplets size and particles concentration in air stream inside extraction ducting. Simulation results are compared with measurements conducted in three commercial spray booths.

For the purpose of research, modelling and simulation of control plants, linear models are commonly used. There are many methods of creating linear models of plant dynamics. Artificial intelligence methods are used in many areas of science and technology. There are also several known applications of artificial intelligence in automatic controllers. The authors have developed a method of linear modelling by means of evolutionary algorithms, which enable searching for optimal values of the transfer function coefficients. For a method validation, an experiment with a real thermal plant was conducted. This paper presents identification of a linear transfer function of a thermal plant.