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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.
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.
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.
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.