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Silo형 가스터빈 연소기에서 발생하는 연소진동 분석 및 저감
서석빈(Seo Seok-Bin),안달홍(Ahn Dal-Hong),차동진(Cha Dong-Jin),박종호(Park Jong-Ho) 대한설비공학회 2009 설비공학 논문집 Vol.21 No.2
The present study describes an investigation into the characteristics of combustion oscillation and its suppression instability of a silo type gas turbine combustor in commercial power plant. Combustion oscillation is occurred the combustor in near full load during operation. As a result of FFT analysis of the combustion dynamics, the frequency of the oscillation is analyzed as the 1'st longitudinal mode of acoustic resonance of the combustor. For suppress of the instability, combustion tuning with adjust of fuel valve schedule is carried out, which changes equivalent ratio of each burners. As the result, the oscillation is successfully reduced with meeting the level of NOx emission regulation.
발전용 가스터빈에서 발생하는 연소진동 특성 및 이상연소진동의 저감
서석빈(Seo Seok-Bin),안달홍(Ahn Dal-Hong),정재화(Chung Jae-Hwa) 대한기계학회 2004 대한기계학회 춘추학술대회 Vol.2004 No.11
Gas Turbine combustors for power plant can be reduced NOx emissions using lean premixed combustion technology. But the combustors are likely to occur combustion oscillations which damage operation reliability and mechanical life of the gas turbines. In this paper, characterizations of oscillation in a gas turbine combustor for power plant are presented. Combustion dynamics occur 1~1.5 psi in amplitude with low frequency less than 140Hz during normal operation. An abnormal high level dynamics, 2.0 psi amplitude occur at 125 Hz frequency. Abnormal combustion oscillation is reduced by modulation of fuel supply valve control schedule.
서석빈(Seo Seok-Bin),안달홍(Ahn Dal-Hong),정재화(Chung Jae-hwa),김종진(Kim Jong-Jin) 대한기계학회 2003 대한기계학회 춘추학술대회 Vol.2003 No.11
Gas Turbine combustors for power plants can be reduced NOx emissions using lean premixed combustion technology. But The combustors are likely to occur combustion oscillations which damage operation reliability and mechanical life of the gas turbines. In this paper, characterizations of oscillation in a gas turbine combustor for power plants are presented. Combustion dynamics occurs 1 ~ 1.5 psi in amplitude with low frequency less than 170㎐ during premixed mode in the combustor. A abnormal high level dynamics, 4 ~ 9 psi amplitude occurs in during combustion mode changes. Tests of pre-filling transfer fuel during the mode change result in reduction of combustion oscillations.
건식 저 NOx 가스터빈의 연소동압 측정용 소프트웨어 시스템 개발
장욱,서석빈,정재화,안달홍,김종진,차동진,Jang, Wook,Seo, Seok-Bin,Jung, Jae-Hwa,An, Dal-Hong,Kim, Jong-Jin,Cha, Dong-Jin 대한설비공학회 2002 설비공학 논문집 Vol.14 No.11
Combustion dynamics of a dry low NOx gas turbine have been measured by utilizing a dynamic pressure measurement system. The software part of the measurement system, implemented with a commercial general-purpose DASYLab version 5.6 code, basically acquires combustion dynamics signals, performs the FFT analysis, and displays the results. The gas turbine often experiences momentary combustion instability, especially when its combustion mode changes. It is found that the measurement system developed in the study may outperform the other commercial dynamic pressure measurement system. The developed system currently serves to monitor the combustion dynamics of the gas turbine.
석탄가스화 복합발전용 가스터빈의 상압 및 고압연소특성에 관한 실험적 연구
이민철(Min Chul Lee),서석빈(Seok Bin Seo),윤영빈(Youngbin Yoon) 한국추진공학회 2011 한국추진공학회 학술대회논문집 Vol.2011 No.11
에너지기후시대에 신에너지원 발굴, 저탄소 녹색성장의 일환으로 석탄 IGCC기술이 개발 중에 있다. 본 연구는 IGCC기술 중 가스화기에서 생산된 합성가스를 가스터빈에 직접 주입시 생길 수 있는 문제점을 미리 파악하고, 그 연소특성자료를 축적하기 위해 수행되었다. GE7EA연소기를 대상으로한 상압 및 고압연소실험을 통해 합성가스의 기본적인 연소특성을 파악하였으며, 수소화염이 과다한 NOx발생의 원인임을 파악하고, 질소희석을 통해 NOx배출량을 제어할 수 있음을 확인하였으며, 연소진동은 크게 발생치 않음을 확인하였다. 본 연구를 통해 축적된 시험 데이터는 2015년에 국내 최초로 준공예정인 태안 IGCC플랜트에 연소진단시스템 및 최적화 기술적용시 활용된 예정이다. In the era of energy climate, IGCC technology is one of the powerful solutions for the demands of new energy with low carbon green growth. The present study is conducted to investigate the combustion characteristics of syngas from the coal gasifier to predict problems when it is fed to the gas turbine. Through high and low combustion tests, we understood that hydrogen is the main reason of NOx emission but easily controled by injecting the dilution of nitrogen. CO emission of syngas was comparable with that of methane and pressure fluctuation of syngas was not significant. The data from this study will be used for the optimization of combustion in the Korea first IGCC plant in 2015.