20.500.12556/DKUM-86594 Numerical modeling of two-phase flow inside a wet flue gas absorber sump A numerical model of a flue gas scrubber sump is developed with the aim of enabling optimization of the design of the sump in order to reduce energy consumption. In this model, the multiphase flow of the continuous phase, i.e., water, and the dispersed phase, i.e., air bubbles, is considered. The air that is blown in front of the agitators, as well as the influence of the flow field of the agitators on the distribution of the dispersed phase and the recirculation pumps as outlet, is modeled. The bubble Sauter mean diameter is modeled using the population balance model. The model is used to analyze operating parameters such as the bubble retention time, the average air volume fraction, bubble Sauter mean diameter, the local distribution of the bubble size and the amount of air escaping from the pump outlets at two operating points. The purpose of the model is to simulate the two-phase flow in the sump of the flue gas scrubber using air dispersion technology with a combination of spargers and agitators, which, when optimized, reduces energy consumption by 33%. The results show that the homogeneity of air is lower in the bottom part of the absorber sump and that the amount of air escaping through recirculation pipes equals 1.2% of the total air blown into the absorber sump. The escaping air consists mainly of bubbles smaller than 6 mm. Additional operating point results show that halving the magnitude of the linear momentum source lowers the air retention, as well as the average homogeneity of the dispersed air flue gas scrubbing air dispersion numerical model OpenFoam čiščenje dimnih plinov disperzija zraka numerični model true false true https://www.mdpi.com/ Angleški jezik Slovenski jezik https://www.mdpi.com/1996-1073/16/24/8123 Članek v reviji 2023-12-19 10:16:19 2023-12-19 10:16:19 2023-12-20 03:39:40 0000-00-00 00:00:00 2023 0 2023 17 str. iss. 24, [article no.] 8123 Vol. 16 Dec. 2023 0000-00-00 Zaloznikova Objavljeno NiDoloceno 2023-12-11 2023-12-14 2023-12-18 519.6:662.963 178077955 10.3390/en16248123 1996-1073 energies-16-08123.pdf energies-16-08123.pdf 1 CE5646FD56B786C2482CF0ECC9185545 5c021887c420ecf7d08debfe1b9093f832333fa3d4e3517a9828cdf8baec4eed ec1ca921-9e4f-11ee-b425-00155d000105 https://dk.um.si/Dokument.php?lang=slv&id=174930 https://www.mdpi.com/1996-1073/16/24/8123 0 568d65d8-9e50-11ee-b425-00155d000105 https://dk.um.si/Dokument.php?lang=slv&id=174933 Fakulteta za strojništvo 0 0 0