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Title:Numerical modeling of two-phase flow inside a wet flue gas absorber sump
Authors:ID Vovk, Nejc (Author)
ID Ravnik, Jure (Author)
Files:.pdf energies-16-08123.pdf (41,41 MB)
MD5: CE5646FD56B786C2482CF0ECC9185545
URL https://www.mdpi.com/1996-1073/16/24/8123
Work type:Article
Typology:1.01 - Original Scientific Article
Organization:FS - Faculty of Mechanical Engineering
Abstract: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
Keywords:flue gas scrubbing, air dispersion, numerical model, OpenFoam
Publication status:Published
Publication version:Version of Record
Submitted for review:11.12.2023
Article acceptance date:14.12.2023
Publication date:18.12.2023
Year of publishing:2023
Year of performance:2023
Number of pages:17 str.
Numbering:Vol. 16, iss. 24, [article no.] 8123
PID:20.500.12556/DKUM-86594 New window
ISSN on article:1996-1073
COBISS.SI-ID:178077955 New window
DOI:10.3390/en16248123 New window
Publication date in DKUM:19.12.2023
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Record is a part of a journal

Shortened title:Energies
Publisher:Molecular Diversity Preservation International
COBISS.SI-ID:518046745 New window

Document is financed by a project

Funder:ARIS - Slovenian Research and Innovation Agency
Project number:P2-0196-2020
Name:Raziskave v energetskem, procesnem in okoljskem inženirstvu


License:CC BY 4.0, Creative Commons Attribution 4.0 International
Description:This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.

Secondary language

Keywords:čiščenje dimnih plinov, disperzija zraka, numerični model


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