http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
안국영(Kook Young Ahn),이상민(Sang Min Lee),이영덕(Young Duk Lee) 대한설비공학회 2006 대한설비공학회 학술발표대회논문집 Vol.2006 No.11
CO₂ capture has become an important environmental issue with accelerating global warming problem. Oxyfuel combustion, utilizing oxygen as oxidizer instead of air, has been actively studied since it enables high-purity CO₂ capture with high efficiency. In order to apply oxyfuel combustion to gas turbine systems, a several cycles with new technologies using highly diluted combustion, internal oxygen production have been developed.
안국영(Kook-Young Ahn),김한석(Han-Seok Kim),이윤원(Yun-Won Lee),황철홍(Chul-Hong Hwang) 대한기계학회 2001 대한기계학회 춘추학술대회 Vol.2001 No.11
The oxygen enhanced combustion technology is becoming important to save the energy and capture CO₂. Recently, concern to reduce the CO₂ has led many researchers to investigate the combustion phenomena including O₂ and CO₂ as oxidizer. A method to capture CO₂ using oxidizer control is firing the fuel in pure or highly enhanced oxygen instead of air. When firing fuel in pure oxygen, the flame temperature is much higher than in air. Flue gas, containing chiefly CO₂, recirculation is necessary to reduce the flame temperature. In this paper the combustion characteristics of oxygen enhanced and CO₂ recirculated flame have been investigated. The emission characteristics, flame stability and the flame temperature were studied experimentally. The compositions of oxidizer were varied by substituting N2 with CO₂ at the constant O₂ concentration. As the CO₂ is increased, the flame became unstable and the CO and NO were decreased due to the heat capacity and radiation effect. Also, the combustion characteristics according to the oxygen enhancement were discussed.
안국영,김한석,안진혁,배형수,Ahn, Kook-Young,Kim, Han-Seok,Ahn, Jin-Hyuk,Pae, Hyoung-Su 대한기계학회 2000 大韓機械學會論文集B Vol.24 No.10
The combustion characteristics have been investigated to develop the 50 kW-class gas turbine combustor. The combustor design program was developed and applied to design this combustor. The combustion air which has the temperature of 45, 200, $300^{\circ}C$ were supplied to combustor for elucidating the effect of inlet air temperature on CO, NOx emissions and flame temperature. The exit temperature and NO were increased and CO was decreased with increasing inlet air temperature. Also, the effect of equivalence ratio was considered to verify the combustor performance. The emissions of CO and NO with inlet air temperature can be analyzed qualitatively by measuring the temperature inside the combustor. The combustion performance with fuel schedule was evaluated to get the informations of the starting and part loading process of gas turbine. The combustion was stable above the equivalence ratio of 0.18. The pattern factor which is the important parameter of combustor performance was satisfied with the design criterion. Consequently the combustor was proved to meet the performance goal required for the target gas turbine system.
전과정 평가(Life Cycle Assessment)방법을 이용한 SOFC 열병합 발전시스템의 환경영향 분석
이영덕(Young Duk Lee),강상규(Sanggyu Kang),안국영(Kook Young Ahn),George Tsatsaronis 대한기계학회 2014 대한기계학회 춘추학술대회 Vol.2014 No.11
The environmental impact associated with a solid-oxide fuel-cell (SOFC) power generation system has been assessed using a life cycle assessment (LCA) method. LCA is a technique assessing the environmental aspects associated with a system during its entire life cycle. To calculate the environmental impact of the analyzed system, a commercial software package, SimaPro version 7.3.3., was used; the ReCiPe method, endpoint approach, and the hierarchists perspective were selected for calculating the values. The calculation results reveal that the manufacturing stage and the disposal stage have small contributions to the total environmental impact, which just cover 2.1% to 9.5% and 0.1% to 0.6% of the total, respectively, depending on the assumption made for the lifetime of the SOFC stack and the overall system. The SOFC stack is a dominant contributor to the environmental impact associated with manufacturing; 72% of the total environmental impact of manufacturing comes from the SOFC stack; the remaining balance-of-plant (BOP) components account for 28% of the total environmental impact.
동축 공기다단 LPG화염의 NOx 생성특성에 관한 연구
김한석,안국영,김호근,유명종,백승욱,Kim, Han-Seok,Ahn, Kook-Young,Kim, Ho-Keun,Yu, Myung-Jong,Baek, Seung-Wook 대한기계학회 2003 大韓機械學會論文集B Vol.27 No.2
Experimental and numerical studies have been done to examine the effects of excess air ratio and tertiary air swirl number on the formation characteristics of NOx in a pilot scale combustor adopting a multi-air staged burner. In numerical calculation the mathematical models for turbulence, radiation and nitric oxide chemistry were taken into account. The radiative transfer equation was solved using the discrete ordinates method with the weighted sum of gray gases model. In the NOx chemistry model, the chemical reaction rates for thermal and prompt NOx were statistically averaged using a probability density function. The results were validated by comparison with measurements. For the experiment, a 0.2 MW pilot multi-staged air burner has been designed and fabricated. Using the numerical simulation developed here, a variation of thermal and prompt NOx formation was predicted by changing the excess air ratio and tertiary air swirl number. As the excess air ratio increased up to 1.9, the formation of the total as well as thermal NOx at exit increased while the prompt NOx decreased. The formation of thermal NOx was more affected by concentration of $O_2$ and $N_2$ than gas temperature. When the tertiary air swirl number increased, the formation of the total as well as the prompt NOx slightly decreased.