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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of the Korean Society of Combustion
Journal Basic Information
Journal DOI :
The Korean Society of Combustion
Editor in Chief :
Volume & Issues
Volume 19, Issue 4 - Dec 2014
Volume 19, Issue 3 - Sep 2014
Volume 19, Issue 2 - Jun 2014
Volume 19, Issue 1 - Mar 2014
Selecting the target year
Experimental Study on Combustion Characteristics of a Swirl-stabilized Conical Burner
Kim, Gu ; Cho, Ju Hyeong ; Lee, Dong Suk ; Kim, Han Seok ; Sohn, Chae Hoon ; Lee, Sang Min ; Kim, Min Kuk ; Ahn, Kook Young ;
Journal of the Korean Society of Combustion, volume 19, issue 3, 2014, Pages 1~7
DOI : 10.15231/jksc.2014.19.3.001
Experimental study has been carried out to understand combustion characteristics of a swirl-stabilized premixed gas turbine combustor for power generation.
and CO emissions, extinction limit, pressure loss, and temperature distribution were measured for various operating conditions. Results show that, with increasing inlet air temperature,
is increased due to a higher adiabatic flame temperature while CO is increased or decreased for low or high A/F ratio regime, respectively. depending on the flame location. With decreasing load from the design condition,
is decreased as thermal load is reduced. With further decreasing load, however,
is increased due to a longer residence time. CO is decreased and then increased with decreasing load. Flame extinction limit is extended with increasing inlet air temperature as the recirculation strength is enhanced.
Evaluation of Plant Performance during Biomass Co-firing in Pulverized Coal Power Plant
Mun, Tae-Young ; Tefera, Zelalem Tumsa ; Lee, Uendo ; Lee, Jeung Woo ; Yang, Won ;
Journal of the Korean Society of Combustion, volume 19, issue 3, 2014, Pages 8~17
DOI : 10.15231/jksc.2014.19.3.008
The aims of this research were to evaluate effects of biomass co-firing to pulverized coal power plants and the variation of co-firing ratios on the plant efficiency related to power consumption of auxiliary system and flue gas characteristics such as production and component by process simulation based on the existing pulverized coal power plant. In this study, four kinds of biomass are selected as renewable fuel candidates for co-firing: wood pellet(WP), palm kernel shell(PKS), empty fruit bunch(EFB) and walnut shell(WS). Process simulation for various biomass fuels and co-firing ratios was performed using a commercial software. Gas side including combustion system and flue gas treatment system was considering with combination of water and steam side which contains turbines, condenser, feed water heaters and pumps. As a result, walnut shell might be the most suitable as co-firing fuel among four biomass since when 10% of walnut shell was co-fired with 90% of coal on thermal basis, flue gas production and power consumption of auxiliary systems were the smallest than those of other biomass co-firing while net plant efficiency was relatively higher than those of other biomass co-firing. However, with increasing walnut shell co-firing ratios, boiler efficiency and net plant efficiency were expected to decrease rather than coal combustion without biomass co-firing.
Analysis of Coal Combustion and Particle Temperature Profiles in a Rotary Kiln for Production of Light-weight Aggregate
Park, Jong-Keun ; Ryu, Changkook ; Kim, Young-Ju ;
Journal of the Korean Society of Combustion, volume 19, issue 3, 2014, Pages 18~25
DOI : 10.15231/jksc.2014.19.3.018
Bottom ash from a coal-fired power plant is usually landfilled to a nearby site, which causes a growing environmental concern and increased operating costs. One way of recycling the bottom ash is to produce light-weight aggregate (LWA) using a rotary kiln. This study investigated the temperature profiles of raw LWA particles in a rotary kiln to identify the range of operating conditions appropriate for ideal bloating. For this purpose, a new simulation method was developed to integrate a 1-dimensional model for the bed of LWA particles and the computational fluid dynamics (CFD) for the fuel combustion and gas flow. The temperature of LWA particles was found very sensitive to the changes in the air preheating temperature and excess air ratio. Therefore, an accurate control of the operation parameters was essential to achieve the bloating of LWA particles without excessive sintering or melting.
The Effects of Exhaust Gas Recirculation on Non-premixed Combustion
Yu, Byeonghun ; Kim, Jinsu ; Lee, Chang-Eon ;
Journal of the Korean Society of Combustion, volume 19, issue 3, 2014, Pages 26~33
DOI : 10.15231/jksc.2014.19.3.026
We examined the characteristics of
emission for CH4/air non-premixed flames using the exhaust gas recirculation(EGR) methods, which are the air-induced EGR(AI-EGR) and fuel-induced EGR(FI-EGR) methods. Our experimental results show that the
) decreased with increasing EGR ratio. In the range needed to form a stable flame, the reduction rate of
for the FI-EGR method was approximately 29% when the EGR ratio was 20%, and the reduction rate for the AI-EGR method was approximately 28% with 25% of the EGR ratio. According to the flame structure based on numerical results, high temperature regions for the FI-EGR method were narrower and lower than those for the AI-EGR method at the same EGR ratio. Furthermore, based on the experimental results for swirl flames, the reduction rate of
for the FI-EGR method was approximately 49% with 15% of the EGR ratio, while the maximum reduction rate for AI-EGR method was approximately 45% with 25% of the EGR ratio. Consequently, we verified that the FI-EGR method was more effective than the AI-EGR method in reducing
emission for non-premixed flames with EGR. We expect that the results of this study will provide fundamental information relating to hybrid combustion systems, which can be used in the design of combustion systems in the future.
Exhaust and Combustion Characteristics of Premixed Swirl Burner for Steam Reforming System
Cha, Chun Loon ; Hwang, Sang Soon ;
Journal of the Korean Society of Combustion, volume 19, issue 3, 2014, Pages 34~43
DOI : 10.15231/jksc.2014.19.3.034
The reformer system is a method for hydrogen production from hydrocarbon fuels such as natural gas under high temperature environment(
). The premixed swirl burner with mixing swirler and combustion swirler designed to deliver fuel cell electric output from 0.5 kW to 1.5 kW. Premixed swirl burner experiments using natural gas and mixture of natural gas and anode off gas were carried out to analyse flame patterns and stability by equivalence ratio respectively. The results show that the stable swirl flame can be established for all cases of fuels type using the premixed swirl burner. The swirl flame had a wide stability region and it showed very low CO(50 ppm) and
(20 ppm) emission at different fuel type and various equivalence ratio conditions. The operating range of premixed swirl burner for stable swirl flame is found to exist between equivalence ratio of 0.70 to 0.90 for turn down ratio of 3:1.
Combustion Characteristics of the SOFC Products for SOFC/Gas Turbine Hybrid Power Generation System
Lee, Byeong Jun ; Bae, Chul Han ;
Journal of the Korean Society of Combustion, volume 19, issue 3, 2014, Pages 44~52
DOI : 10.15231/jksc.2014.19.3.044
Solid oxide fuel cell(SOFC) makes electric power using hydrogen or reformed from methane and emits high temperature products that contain flammable species like hydrogen, carbon monoxide and methane which varies with operation condition. SOFC/gas turbine integrated system which uses thermal and chemical energy of the discharges is more efficient than SOFC itself. Burning character of the SOFC products will affect the efficiency and stability of the system. Experiments were conducted to know the characteristics of the flame for two typical composition of SOFC products, i.e. start-up and steady state composition. When coflowing air temperature was higher than
, auto-ignitin occurred for both fuels. Though start-up fuel has higher contents of hydrogen, it makes longer flame than steady state composition. It was inferred that the amount of oxidizer necessary to burn makes this phenomenon. Steady state composition fuel was unstable since it contains lots of water. Nozzle that had 6 holes, distance between each hole was 16.7 times of hole diameter, improved the stability of the flame.