Assessments on SGG and WSGG spectral models in high-ash coal combustion
In radiation process, a variety of models can be used to represent the spectral radiative properties of combustion gases. In coal combustion, the high level of soot concentration brings higher complexity to the formulation. Several pieces of research are found, comparing different radiation models u...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2020-10-01
|
| Series: | Case Studies in Thermal Engineering |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214157X20301386 |
| _version_ | 1818209989885427712 |
|---|---|
| author | Conrado Ermel Paulo Rodolfo Buffon Ortiz Raul Vanz Cristiano V. da Silva Paulo S. Schneider |
| author_facet | Conrado Ermel Paulo Rodolfo Buffon Ortiz Raul Vanz Cristiano V. da Silva Paulo S. Schneider |
| author_sort | Conrado Ermel |
| collection | DOAJ |
| description | In radiation process, a variety of models can be used to represent the spectral radiative properties of combustion gases. In coal combustion, the high level of soot concentration brings higher complexity to the formulation. Several pieces of research are found, comparing different radiation models usually applied to idealized laboratory situations. Only a few works explore the behavior of such models in real scale applications, such as coal-fired furnaces. Comparisons among different arrangements of the SGG and WSGG models were carried out by means of CFD simulations, applied to a boiler of a real 160 MW coal-fired power plant. Five different cases were simulated. The most simple case was set with a fixed absorption coefficient SGG model, while the most detailed case was achieved by employing a WSGG model with gas and soot absorption coefficients overlay. Temperature fields were well represented by all cases, with maximum deviations of 6%. Predictions on radiative heat flux for the SGG models were significantly lower than the WSGG simulations, with relative deviations up to 16.46%. Even though deviations on radiative heat flux are significant, results suggest the suitability of simple gray gas models in fast assessments of industrial applications such as coal-fired furnaces. |
| first_indexed | 2024-12-12T05:09:29Z |
| format | Article |
| id | doaj.art-07937a3301584d15a785f54f08529a8b |
| institution | Directory Open Access Journal |
| issn | 2214-157X |
| language | English |
| last_indexed | 2024-12-12T05:09:29Z |
| publishDate | 2020-10-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Thermal Engineering |
| spelling | doaj.art-07937a3301584d15a785f54f08529a8b2022-12-22T00:36:59ZengElsevierCase Studies in Thermal Engineering2214-157X2020-10-0121100667Assessments on SGG and WSGG spectral models in high-ash coal combustionConrado Ermel0Paulo Rodolfo Buffon Ortiz1Raul Vanz2Cristiano V. da Silva3Paulo S. Schneider4Department of Mechanical Engineering, Federal University of Rio Grande do Sul - UFRGS, Brazil; Corresponding author.Department of Mechanical Engineering, Federal University of Rio Grande do Sul - UFRGS, BrazilDepartment of Mechanical Engineering, Federal University of Rio Grande do Sul - UFRGS, BrazilDepartment of Engineering and Computational Sciences, Integrated Regional University of High Uruguai and Missions - URI, BrazilDepartment of Mechanical Engineering, Federal University of Rio Grande do Sul - UFRGS, BrazilIn radiation process, a variety of models can be used to represent the spectral radiative properties of combustion gases. In coal combustion, the high level of soot concentration brings higher complexity to the formulation. Several pieces of research are found, comparing different radiation models usually applied to idealized laboratory situations. Only a few works explore the behavior of such models in real scale applications, such as coal-fired furnaces. Comparisons among different arrangements of the SGG and WSGG models were carried out by means of CFD simulations, applied to a boiler of a real 160 MW coal-fired power plant. Five different cases were simulated. The most simple case was set with a fixed absorption coefficient SGG model, while the most detailed case was achieved by employing a WSGG model with gas and soot absorption coefficients overlay. Temperature fields were well represented by all cases, with maximum deviations of 6%. Predictions on radiative heat flux for the SGG models were significantly lower than the WSGG simulations, with relative deviations up to 16.46%. Even though deviations on radiative heat flux are significant, results suggest the suitability of simple gray gas models in fast assessments of industrial applications such as coal-fired furnaces.http://www.sciencedirect.com/science/article/pii/S2214157X20301386RadiationSpectral modelWSGGGray gasCoal combustion |
| spellingShingle | Conrado Ermel Paulo Rodolfo Buffon Ortiz Raul Vanz Cristiano V. da Silva Paulo S. Schneider Assessments on SGG and WSGG spectral models in high-ash coal combustion Case Studies in Thermal Engineering Radiation Spectral model WSGG Gray gas Coal combustion |
| title | Assessments on SGG and WSGG spectral models in high-ash coal combustion |
| title_full | Assessments on SGG and WSGG spectral models in high-ash coal combustion |
| title_fullStr | Assessments on SGG and WSGG spectral models in high-ash coal combustion |
| title_full_unstemmed | Assessments on SGG and WSGG spectral models in high-ash coal combustion |
| title_short | Assessments on SGG and WSGG spectral models in high-ash coal combustion |
| title_sort | assessments on sgg and wsgg spectral models in high ash coal combustion |
| topic | Radiation Spectral model WSGG Gray gas Coal combustion |
| url | http://www.sciencedirect.com/science/article/pii/S2214157X20301386 |
| work_keys_str_mv | AT conradoermel assessmentsonsggandwsggspectralmodelsinhighashcoalcombustion AT paulorodolfobuffonortiz assessmentsonsggandwsggspectralmodelsinhighashcoalcombustion AT raulvanz assessmentsonsggandwsggspectralmodelsinhighashcoalcombustion AT cristianovdasilva assessmentsonsggandwsggspectralmodelsinhighashcoalcombustion AT paulosschneider assessmentsonsggandwsggspectralmodelsinhighashcoalcombustion |