표제지
요약문
ABSTRACT
목차
NOMENCLATURE 12
SUBSCRIPTS 13
GREEK LETTERS 14
제1장 서론 15
제2장 시스템 모델링 19
2.1. 개요 19
2.1.1. 성능 해석 모델 19
2.1.2. 성능 해석 프로그램 20
2.2. 덕트 22
2.3. 연소기 23
2.4. 압축기 및 냉각공기 25
2.4.1. 압축기 및 냉각공기 설계 모델링 25
2.4.2. 압축기 탈설계 모델링 28
2.4.3. 냉각공기 탈설계 해석 30
2.5. 터빈 31
2.5.1. 터빈 설계 모델링 31
2.5.2. 터빈 탈설계 모델링 33
2.6. 대상 가스터빈 및 설계점 모사 36
2.7. 부분부하 운전 과정 39
2.8. 성능선도 수정 과정 41
제3장 결과 45
3.1. 성능선도 수정 결과 45
3.2. Case별 성능 예측 정확도 비교 47
3.2.1. 터빈 해석 모델에 따른 성능 예측 결과 47
3.2.2. 압축기 추기 모델에 따른 성능 예측 결과 53
3.3. 외기온별 TET 제어구간 성능 비교 58
3.3.1. 외기온별 TET 제어구간 예측 결과 58
3.3.2. 외기온별 TET 제어구간 성능 파라미터 예측 결과 63
제4장 결론 67
참고문헌 70
Table 1. Cases of the gas turbine performance analysis model. 19
Table 2. Liquified natural gas properties. 24
Table 3. Design point of the F-class gas turbine of the field data and simulation models. 38
Fig. 1. Configuration of gas turbine model of simplified cooling air extraction. 18
Fig. 2. Configuration of gas turbine model of detailed cooling air extraction. 18
Fig. 3. Structure of the In-house program. 21
Fig. 4. Performance map of the compressor. 29
Fig. 5. Schematic of coolant flow at single-stage turbine. 32
Fig. 6. Performance map of the turbine. 35
Fig. 7. Partial load operation process of field data. 40
Fig. 8. Scaling process of compressor flow-pressure ratio performance map. 43
Fig. 9. Adjusting scaling position by adapting compressor efficiency map. 43
Fig. 10. Turbine efficiency map adaptation by changing shape of speed line. 44
Fig. 11. Partial load operation result before map adaptation. 46
Fig. 12. Partial load operation result after map adaptation. 46
Fig. 13. TET according to turbine analysis model. 49
Fig. 14. CDT according to turbine analysis model. 49
Fig. 15. PR according to turbine analysis model. 50
Fig. 16. Fuel flowrate according to turbine analysis model. 50
Fig. 17. Turbine normalized efficiency according to turbine analysis model. 52
Fig. 18. Turbine normalized corrected flowrate according to turbine analysis model. 52
Fig. 19. Enthalpy of coolant according to the extraction location. 54
Fig. 20. Coolant flowrate according to compressor cooling air extraction model. 54
Fig. 21. TET according to compressor cooling air extraction model. 56
Fig. 22. CDT according to compressor cooling air extraction model. 56
Fig. 23. PR according to compressor cooling air extraction model. 57
Fig. 24. Fuel flowrate according to compressor cooling air extraction model. 57
Fig. 25. TET of field data according to ambient temperature. 59
Fig. 26. Ambient temperature distribution of field data. 59
Fig. 27. TET control curve in partial load operation at the ambient temperature of (a) 5℃ (b) 10℃ (c) 15℃ (d) 20℃ (e) 25℃. 60
Fig. 28. TET control curve according to ambient temperature. 61
Fig. 29. Variation of operating points by ambient temperature in the compressor performance map. 62
Fig. 30. Variation of operating points by ambient temperature in the turbine performance map. 62
Fig. 31. CDT in partial load operation at the ambient temperature of (a) 5℃ (b) 10℃ (c) 15℃ (d) 20℃ (e) 25℃. 64
Fig. 32. PR in partial load operation at the ambient temperature of (a) 5℃ (b) 10℃ (c) 15℃ (d) 20℃ (e) 25℃. 65
Fig. 33. Fuel flowrate in partial load operation at the ambient temperature of (a) 5℃ (b) 10℃ (c) 15℃ (d) 20℃ (e) 25℃. 66