하절기 기화냉각장치 설치에 따른 가스터빈 성능변화 해석

Abstract

본 연구는 하절기 가스터빈 압축기 입구에 설치된 기하냉각장치로 인하여 저하된 공기온도가 가스터빈 성능에 어떠한 변화를 미치는지에 대하여 해석하였다. 연구 대상은 인천화력본부 가스터빈 3호기이며, 기종은 Siemens SGT6-4000F(V 84.3A)이다. 기화냉각장치 설치 전후를 비교하기 위하여 2015년 8월 3일에서 14일까지 11시에서 15시 사이에서 대기온도 29 ± 1 ℃ 조건하에 성능시험을 수행하였고, 장치 설치 전후 각각 5회씩 총 10회에 걸쳐 취득한 데이터는 그 평균값을 적용하였다. 성능시험 결과, 가스터빈 압축기 입구 공기온도 4.12 ℃ 저하로 공기 밀도가 증가되어 압축기 압력비는 0.27 증가, 압축기 효율은 0.29 %p 상승, 가스터빈 엔탈피강하 효율은 0.31 %p 증가하였고, 가스터빈 효율은 0.44 %p, 출력은 4,489 kW가 증대되는 효과를 얻을 수 있었으며, 습도 및 유동저항 증가에 따른 영향은 미미하였다.|This study had analyzed with respect to how any change of gas turbine performance by air temperature decreases with a evaporation cooling system in summer season. This study is based on a gas turbine Siemens SGT6-4000F (V 84.3A) in Incheon thermal power plant Unit 3. I had installed special instruments in order to compare performance of gas turbine between before and after installation with evaporation cooling system on the condition that ambient temperature is over 29 ± 1 ℃. and it was tested a total of 10 times, five times each from non-installed and installed system during 11 am to 15 pm on Aug. 3 to Aug. 14. 2015. and applied average value from acquisited data to calculate performance of gas turbine. As a result, decreased temperature 4.12 ℃ of inlet gas turbine compressor had increased air density so, it was obtained the effect followed, increased compressor pressure ratio 0.27, improved compressor efficiency 0.29 %p, improved gas turbine enthalpy drop efficiency 0.31 %p, improved the gas turbine efficiency 0.44 %p, improved electric power output 4,489 kW, on the other side. the influence of the humidity increase and flow resistance increase was negligible.; This study had analyzed with respect to how any change of gas turbine performance by air temperature decreases with a evaporation cooling system in summer season. This study is based on a gas turbine Siemens SGT6-4000F (V 84.3A) in Incheon thermal power plant Unit 3. I had installed special instruments in order to compare performance of gas turbine between before and after installation with evaporation cooling system on the condition that ambient temperature is over 29 ± 1 ℃. and it was tested a total of 10 times, five times each from non-installed and installed system during 11 am to 15 pm on Aug. 3 to Aug. 14. 2015. and applied average value from acquisited data to calculate performance of gas turbine. As a result, decreased temperature 4.12 ℃ of inlet gas turbine compressor had increased air density so, it was obtained the effect followed, increased compressor pressure ratio 0.27, improved compressor efficiency 0.29 %p, improved gas turbine enthalpy drop efficiency 0.31 %p, improved the gas turbine efficiency 0.44 %p, improved electric power output 4,489 kW, on the other side. the influence of the humidity increase and flow resistance increase was negligible.