Oxy-fuel combustion boiler for CO2 capturing: 50 kW-class model test and numerical simulation

Ahn, Jeongmin; Kim, Hyouck Ju; Choi, Kyu Sung

doi:10.1007/s12206-010-0711-y

Cited by 11 publications

(4 citation statements)

References 6 publications

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“…In a study on applying oxy-fuel combustion to an industrial boiler, Ahn et al [16] compared air combustion and oxy-fuel combustion in the combustion chamber of a furnace-type boiler and showed that retrofitting was possible by replacing the burner. Introducing flue gas recirculation (FGR) into an oxy-fuel boiler offers several benefits, including reductions in emissions, improved combustion stability, and enhanced carbon capture performance [17].…”

Section: Introductionmentioning

confidence: 99%

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Heat Transfer and Thermal Efficiency in Oxy-Fuel Retrofit of 0.5 MW Fire Tube Gas Boiler

Ahn

2024

Processes

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Industrial boilers cause significant energy wastage that could be mitigated with oxy-fuel combustion versus traditional air combustion. Despite several feasibility studies on oxy-fuel burners, they are widely avoided in industry due to major infrastructural challenges. This study measured the performance and heat transfer characteristics of each component in a 0.5 MW fire tube gas boiler after retrofitting it with an oxy-fuel burner. Comparisons were drawn across three combustion modes—air combustion, oxy-fuel combustion, and oxy-fuel flue gas recirculation (FGR). The Dittus–Boelter equation was employed to predict heat transfer in the fire tube for all combustion modes at full load (100%). Heat transfer in the latent heat section of the economizer was measured and compared with predictions using the Zukauskas equation. With this retrofit, oxy-fuel combustion improved the thermal efficiency by about 3–4%. In oxy-fuel combustion, the flow rate of exhaust gas decreased. When integrated into an existing fire tube boiler, the fire tube’s heat transfer contribution diminished greatly, suggesting the economic viability of a redesigned, reduced fire tube section. Additionally, a new design could address the notable increase in gas radiation from the fire tube in oxy-fuel and FGR, as well as aid in the efficient recovery of condensation heat from exhaust gases.

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Section: Introductionmentioning

confidence: 99%

“…The aforementioned studies [16][17][18][19][20][21] focused on the combustion chamber's flame and heat transfer characteristics. However, to successfully retrofit oxy-fuel combustion into existing industrial boilers, it is essential to consider heat transfer in components beyond the combustion chamber.…”

Section: Introductionmentioning

confidence: 99%

Heat Transfer and Thermal Efficiency in Oxy-Fuel Retrofit of 0.5 MW Fire Tube Gas Boiler

Ahn

2024

Processes

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“…At the combustion of fossil fuels, not only emerging pollutants [1] to [4] and [6], [7] are closely monitored, but also other indicators that characterize the quality of the combustion process. At the combustion of coal, such indicator is e.g.…”

Section: Introductionmentioning

confidence: 99%

Removal of Ammonium Ions from Gypsum Slurry in the Process of Desulphurisation of Flue Gases

Příhoda¹,

Čarnogurská²,

Pavlov³

2015

AMS

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Temperatures. From all of her significant publications there are 16 scientific articles published in Web of Knowledge database, 35 scientific articles published in Scopus database and many other research publications. Mária Čarnogurská, prof. Ing., CSc., is a graduate of Faculty of Mechanical Engineering, Technical University in Kosice (1977). Currently works as a Head of Department of Power Engineering at Faculty of Mechanical Engineering at a. m. university. Her long-term professional focus is the area of power engineering. Her research is concentrating on mathematical and physical modeling of processes and effects applied in power engineering, the flow of various media in energy machines and equipment as well as the exploitation of unused heat energy in diverse industrial applications. She is the author of 4 monographs. From all of her significant publications there are 10 scientific articles published in Web of Knowledge database, 3 scientific articles published in Scopus database and many other research publications.

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“…While combusting various fuels in boilers and other engineering facilities, not only pollutants (Ahn et al, 2010;Čarnogurská et al, 2012;Moroń et al, 2013), but also other indicators that characterise the quality of the combustion process are thoroughly monitored. Such an indicator is, for example, the quality (composition) of ashes during coal combustion.…”

Section: Introductionmentioning

confidence: 99%

The Influence Of Calcite On The Ash Flow Temperature For Semi-Anthracite Coal From Donbas District

Čarnogurská¹,

Příhoda²,

Pyszko³

et al. 2014

Chemical and Process Engineering

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3Slovenské elektrárne, subsidiary of the Enel Group, Thermal Power Plant Vojany, 076 72 Vojany, Slovakia This paper presents the results of research focused on the lowering of ash flow temperature at semianthracite coal from Donbas district by means of additive (calcite) dosing. Ash fusion temperatures were set for two coal samples (A, B) and for five various states (samples of ash without any additives, with 1%, with 3%, with 5% and with 7% of the additive) in total. The macroscopicphotographic method was used for identifying all specific temperatures. Obtained outputs prove that A type coal has a lower value of sphere temperature than B type coal in the whole scope of percentage representation of the additive. The flow temperature dropped in total from 1489 C to 1280 C, i.e. by 14% during the test of coal of type A with 7% of the additive; while it was near 10% for coal of type B (from 1450 C to 1308 C). Numerical simulations of the process showed that it is not effective to add an additive with a grain size lower than 280 µm by means of wastevapour burners.

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Oxy-fuel combustion boiler for CO2 capturing: 50 kW-class model test and numerical simulation

Cited by 11 publications

References 6 publications

Heat Transfer and Thermal Efficiency in Oxy-Fuel Retrofit of 0.5 MW Fire Tube Gas Boiler

Heat Transfer and Thermal Efficiency in Oxy-Fuel Retrofit of 0.5 MW Fire Tube Gas Boiler

Removal of Ammonium Ions from Gypsum Slurry in the Process of Desulphurisation of Flue Gases

The Influence Of Calcite On The Ash Flow Temperature For Semi-Anthracite Coal From Donbas District

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