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H₂/CO 합성가스와 메탄의 GE7EA 모사가스터빈 연소성능시험
이민철(Min Chul Lee),서석빈(Seok Bin Seo),주용진(Youg Jin Joo),김시문(Si-Moon Kim),안달홍(Dal Hong Ahn) 대한기계학회 2009 대한기계학회 춘추학술대회 Vol.2009 No.5
IGCC technology makes it possible to utilize the low cost and clean electricity generation from coal, biomass, petroleum coke, wastes and etc. On top of that, IGCC is pre-requisite to develop the technology of CCS and hydrogen generation from coal. This study was conducted to verify the combustion performance of synthetic gas and to identify potential problems when synthetic gas is fuelled to a gas turbine. GE7EA gas turbine of Pyong-Tak power plant was selected for this study. Combustion tests were conducted by comparing hydrogen and carbon monoxide synthetic gas with methane, which is a major component of natural gas, in terms of combustion instability, NOx emission, and the exit gas temperature of the combustor. From the results of the fuel nozzle temperature we have ascertained that syngas is easy to flash back, and this property should be considered when operating a gas turbine and retrofitting a burner.
이민철(Min Chul Lee),서석빈(Seok Bin Seo),정재화(Jae Hwa Chung),주용진(Youg Jin Joo),안달홍(Dal Hong Ahn) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.5
DME (Dimethyl Ether, CH₃OCH₃) has highly attracted attention as an alternative fuel for transportation, power generation and LPG substitute owing to its easy transportation and cleanliness. This study was conducted to verify the combustion performance and to identify potential problems when DME is fuelled to a gas turbine. GE7EA gas turbine of Pyong-Tak power plant was selected as a target to apply the DME. Combustion tests were conducted by comparing DME with methane, which is a major component of natural gas, in terms of combustion instability, NOx and CO emissions, and the outlet temperature of the combustion chamber. The results of the performance tests show that DME is very clean but has a low combustion efficiency in low load condition. From the results of the fuel nozzle temperature we have ascertained that DME is easy to flash back, and this property should be considered when operating a gas turbine and retrofitting a burner.
석탄으로부터 생성된 합성가스의 가스터빈 고압 연소성능시험
이민철(Min Chul Lee),서석빈(Seok Bin Seo),박세익(Se Ik Park),윤영빈(Young Bin Youn) 한국연소학회 2011 KOSCOSYMPOSIUM논문집 Vol.- No.42
With great interest about IGCC(Integrated Gasification Combined Cycle) which is one of the potential technology of Low Carbon Green Growth, Korea government launched second stage of 300㎿ demo-IGCC plant construction project.(Project Supervisor : KEPCO, Plant Owner : Korea Western Power Corporation) This korea first IGCC plant will be constructed in Tae-an in 2015, but the low availability and operability issues are raised because there is neither any IGCC plant operation experiences nor skilled operator From other IGCC plants experiences in the world., we get to know that gas turbine failures are main source of low availability. Thus to enhance the combustion performance and reliability in the combined cycle island, coal-derived synthetic gas combustion performance test was conducted in KEPCO research institute. Combustion test was conducted in high pressure high temperature condition with the gas turbine model combustor of GE7EA. From the test, some important characteristics of coal gas including turbine inlet temperature, dynamic pressure, NOx emission and combustion efficiency etc. was revealed. The results of the test can be able to be utilized for the operation and diagnostics of IGCC plant.
모델 가스터빈 연소기에서 합성가스 연소성능시험 - Part 2
이민철(Min Chul Lee),윤지수(Jisu Yoon),주성필(Seong Pil Joo),윤영빈(Youngbin Yoon) 한국항공우주학회 2013 韓國航空宇宙學會誌 Vol.41 No.8
본 논문은 부게넘 및 태안 IGCC플랜트의 연료를 대상으로 석탄으로부터 생성된 합성가스의 NOx/CO배출 특성, 온도특성, 화염의 구조에 대해 기술하였다. GE7EA 모사 가스터빈 연소기를 대상으로 상압 고온 연소시험을 수행하여 입열량 및 질소희석에 따른 연소특성을 관찰하였다. 입열량이 감소하고, 희석제량이 증가할 때 단열화염온도의 감소로 NOx가 감소하였고, 저부하에서는 희석량이 증가할수록 불완전 연소로 인해 CO가 증가하였다. 이러한 NOx 감소 및 CO발생은 각각 1500 ℃ 와 1250 ℃의 특정 화염온도에서 관찰되었다. 또한 질소 희석이 증가할수록 단열화염온도 및 연소기 라이너의 온도가 감소했고, 화염 부상과 같은 화염구조의 변화로 인해 특이점이 관찰되었다. 본 연구결과를 통해 질소희석이 NOx/CO배출 및 온도, 화염구조에 미치는 영향이 검토되었으며, 시험 데이터는 향후 태안 IGCC 플랜트의 운전시 최적 조건 선정을 위한 기초자료로 활용될 예정이다. This paper describes on the NOx/CO emission characteristics, temperature characteristics and flame structures when firing coal derived synthetic gas especially for gases of Buggenum and Taean IGCC. These combustion characteristics were observed by conducting ambient-pressure elevated-temperature combustion tests in GE7EA model combustor when varying heat input and nitrogen dilution ratio. Nitrogen addition caused decrement in adiabatic flame temperature, thus resulting in the NOx reduction. At low heat input condition, nitrogen dilution raised the CO emission dramatically due to incomplete combustion. These NOx reduction and CO arising phenomena were observed at certain flame temperature of 1500 ℃ and 1250 ℃, respectively. As increasing nitrogen dilution, adiabatic flame temperature and combustor liner temperature were decreased and singular points were detected due to change in flame structure such as flame lifting. From the results, the effect of nitrogen dilution on the NOx/CO and flame structure was examined, and the test data will be utilized as a reference to achieve optimal operating condition of the Taean IGCC demonstration plant.
신연료 DME의 복합화력발전소 적용을 위한 연소성능시험
이민철(Min Chul Lee),서석빈(Seok Bin Seo),정재화(Jae Hwa Jung),안달홍(Dal Hong Ahn) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.6
Recently, DME(Dimethyl Ether, CH3OCH3) has highly attracted attention as an alternative fuel because of its easy transportation and clean characteristics. This study was conducted to verify the combustion performance and to find troubles when DME is fuelled to a gas turbine. Combustion tests were conducted by comparing DME with methane, which is a main component of natural gas, in aspects of combustion instability, NOx and CO emission and the outlet temperature of combustion chamber. The results of performance tests show that DME is a very clean but hard to control. CO emission level of DME is lower than that of methane and NOx emission level of DME is as low as that of methane. When firing DME, the pressure fluctuation in combustion chamber caused by combustion instability is lower than that of firing methane. From the result of outlet temperature, we can get DME is easy to flash back, and this property should be considered when operating a gas turbine and designing a burner.