Numerical study for the assessment of pollutant dispersion from a thermal power plant under the different temperature regimes

In this paper, numerical simulation of motion and dispersion of pollutant emissions into the atmosphere under real atmospheric conditions were considered. To solve this problem, a system of Reynolds-averaged Navier–Stokes equations was used, and the standard k-epsilon and SST k-omega turbulence models were used to close this system of equations. Moreover, the test problem was solved numerically to verify the mathematical model and numerical algorithm. The obtained numerical results were compared with the experimental data and modeling results of well-known authors. A proven mathematical model and numerical algorithm was used to describe the process of pollutant emissions from Ekibastuz SDPP (Ekibastuz State District power plant) chimneys and the spread of CO₂ in the air flow field under real atmospheric conditions. For this problem, four different speed regimes (the first—0.5 m/s and 1 m/s, the second—1 m/s and 1.5 m/s, the third—2 m/s and 4 m/s, and the fourth—4 m/s and 5 m/s), as well as three different temperature regimes (constant temperature, decrease temperature, and temperature inversion) were considered.