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Abstract. This paper describes the experimental test bench used in coolant flow research with application of adjusted optical laser system. It is based on the technology of pulsed particle visualization of micro tracers, i.e. Particle Image Velocimetry (PIV system) that allows for the analysis of the microstructure of the hydrodynamic liquid flow passed through the vortex inserts. Optical measurement (PIV-method) of hydro-and aerodynamic characteristics of the coolant flow allowed obtaining the velocity distribution in straight and various curved sections of the pipeline in order to reliably define the vortex formation condition and the occurrence of the pressure gradient on the outer and inner walls of the curved sections. This gives us the opportunity to verify the calculation models describing the problem of passive control (decrease) of the displacement of pipelines of power equipment, and thus to improve the reliability and safe operation of the system in general.

In this work, a mathematical model of multiple gas–solid reactions in a porous sorbent has been applied to simulate warm gas desulfurization. The model has been formulated by incorporating the intrinsic kinetics of the individual reactions obtained from separate experiments. The model output has been compared to the experimental results of zinc oxide sulfidization and reduction by hydrogen and carbon monoxide. The microstructure of subgrains was simplified to reduce computational costs. The model predictions were in good agreement with experimental measurements of the overall rate of reaction and the degree of sulfur fixation over a wide range of experimental conditions. The mathematical model successfully predicted the performance of a porous sorbent in a thermogravimetric analysis reactor. We demonstrated numerically that hydrogen is more harmful to zinc oxide-based sorbents than carbon monoxide, implying that a shift reactor would be best located downstream, rather than upstream from a warm gas-cleaning process.

Рассмотрены вопросы интенсивного охлаждения теплонапряженных элементов при помощи пародинамических технологий. Показана возможность пассивного отвода тепловой энергии в осевом направлении с плотностью теплового потока выше 10 6 Вт/м 2 .Ключевые слова: атомная энергетика, бассейн выдержки, термосифон, тепловая энергия, эффективность.

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