감사의 글
국문요약
목차
제 1 장 서론 13
제 2 장 수격현상 현장시험 16
제 1 절 시험장치 구성 16
제 2 절 시험방법 18
(1) 펌프의 기동 18
(2) 펌프의 정지 18
제 3 절 에어챔버내 수위결정 20
(1) 에어챔버의 스위칭과 경고 신호 20
(2) 스위칭 과정(switching procedures) 22
제 3 장 펌프장 수격현상 현장시험 결과 25
제 1 절 영천댐 도수로 펌프장(한국수자원공사) 25
(1) 시스템 구성 25
(2) 펌프긴급정지에 따른 수격현상 현장시험 29
(3) 수치해석과 시험결과의 비교 및 분석 35
제 2 절 노량진 배수지 펌프장(서울시 상수도 사업본부) 36
(1) 시스템 구성-대방배수지 계통 36
(2) 펌프긴급정지에 따른 수격현상 시험-대방배수지 계통 38
(3) 시스템 구성-상도배수지 계통 41
(4) 펌프긴급정지에 따른 수격현상 시험-상도배수지 계통 43
(5) 수치해석과 시험결과의 비교 및 분석 46
제 3 절 대현산 배수지 펌프장(서울시 상수도 사업본부) 47
(1) 시스템 구성 47
(2) 펌프긴급정지에 따른 수격현상 시험 49
(3) 수치해석과 시험결과의 비교 및 분석 53
제 4 절 태백권 광역상수도 펌프장(한국수자원공사) 54
(1) 시스템 구성-화전 제1가압장 54
(2) 펌프긴급정지에 따른 수격현상 시험-화전 제1가압장 56
(3) 시스템 구성-화전 제2가압장 60
(4) 펌프긴급정지에 따른 수격현상 시험-화전 제2가압장 62
(5) 수치해석과 시험결과의 비교 및 분석 66
제 4 장 결론 67
참고문헌 68
부록 69
ABSTRACT 79
Table 2.1 Check sheet of the field test 19
Table 3.1 Specification of pump & air chamber in Imha booster pumping station 26
Table 3.2 Normal operating condition of Imha booster pumping station 29
Table 3.3 Comparison of measured and predicted pressure heads in the air chamber at the inlet & exit of Imha pumping station 30
Table 3.4 Specification of pump & air chamber from the booster pumping station to Daebang distribution reservoir 36
Table 3.5 Normal operating condition from the booster pumping station to Daebang distribution reservoir 38
Table 3.6 Comparison of measured and predicted pressure heads in the air chamber from the booster pumping station to Daebang distribution reservoir 39
Table 3.7 Specification of pump & air chamber from the booster pumping station to Sangdo distribution reservoir 41
Table 3.8 Normal operating condition from the booster pumping station to Sangdo distribution reservoir 43
Table 3.9 Comparison of measured and predicted pressure heads in the air chamber from the booster pumping station to Sangdo distribution reservoir 44
Table 3.10 Specification of pump & air chamber in Daehyunsan booster pumping station 47
Table 3.11 Normal operating condition of Daehyunsan booster pumping station 49
Table 3.12 Comparison of measured and predicted pressure heads in the air chamber of Daehyunsan booster pumping station 50
Table 3.13 Specification of pump & air chamber in Hwajeon 1st booster pumping station 54
Table 3.14 Normal operating condition of Hwajeon 1st booster pumping station 56
Table 3.15 Comparison of measured and predicted pressure heads in the air chamber of Hwajeon 1st booster pumping station 57
Table 3.16 Specification of pump & air chamber in Hwajeon 2nd booster pumping station 60
Table 3.17 Normal operating condition of Hwajeon 2nd booster pumping station 62
Table 3.18 Comparison of measured and predicted pressure heads in the air chamber of Hwajeon 2nd booster pumping station 63
Fig. 2.1 Arrangement of the measuring equipment for water -hammer 17
Fig. 2.2 Block diagram of data aquisition system 17
Fig. 2.3 Principal arrangement of an air chamber 21
Fig. 3.1 Raw water pipeline system from Imha dam through booster pumping station to the tunnel inlet 27
Fig. 3.2 Longitudinal pipeline profile and simulated nodes from Imha dam through booster pumping station to the inlet of raw water tunnel 27
Fig. 3.3 The pump & motor of Imha booster pumping station 28
Fig. 3.4 The air chamber of Imha booster pumping station 28
Fig. 3.5 Waterhammer test results for 1 pump trip at the pumping station 31
Fig. 3.6 Waterhammer test results for 4 pumps trip at the pumping station 32
Fig. 3.7 Comparison of measured and predicted pressures in the air chamber at the inlet of Imha pumping station after 1 pump power failure 33
Fig. 3.8 Comparison of measured and predicted pressures in the air chambers at the exit of ImHa pumping station after 1 pump power failure 33
Fig. 3.9 Comparison of measured and predicted pressures in the air chamber at the inlet of Imha pumping station after 4 pumps power failure 34
Fig. 3.10 Comparison of measured and predicted pressures in the air chambers at the exit of Imha pumping station after 4 pumps power failure 34
Fig. 3.11 Longitudinal pipeline profile and simulated nodes from the booster pumping station to Daebang distribution reservoir 37
Fig. 3.12 Noryangjin booster pumping station 37
Fig. 3.13 Waterhammer test of Noryangjin booster pumping station 39
Fig. 3.14 Variations of the measured pressure head after power failure 40
Fig. 3.15 Comparison of measured and predicted pressure heads in the air chamber for 4 pumps trip 40
Fig. 3.16 Pipeline networks from the booster pumping station to Sangdo distribution reservoir 42
Fig. 3.17 Longitudinal pipeline profile and simulated nodes from the pumping station to the high ground distribution reservoir 42
Fig. 3.18 Variations of the measured pressure head after power failure 45
Fig. 3.19 Comparison of measured and predicted pressure heads in the air chamber for 3 pumps trip 45
Fig. 3.20 Longitudinal pipeline profile and simulated nodes from the pumping station to Keumho distribution reservoir 48
Fig. 3.21 Air chamber of Daehyunsan booster pumping station 48
Fig. 3.22 Waterhammer test of Daehyunsan booster pumping station 50
Fig. 3.23 Waterhammer test results for 2 pumps trip 51
Fig. 3.24 Waterhammer test results for 3 pumps trip 51
Fig. 3.25 Predicted pressure heads in the air chamber with the number of pumps after power failure 52
Fig. 3.26 Predicted flowrates vs. time from the air chamber with the number of pumps after power failure 52
Fig. 3.27 Longitudinal pipeline profile and simulated nodes from Hwajeon 1st booster pumping station to Hwajeon 2nd booster pumping station 55
Fig. 3.28 Air chamber of Hwajeon 1st booster pumping station 55
Fig. 3.29 Waterhammer test of Hwajeon 1st booster pumping station 57
Fig. 3.30 Waterhammer test results for 1 pump trip 58
Fig. 3.31 Waterhammer test results for 3 pumps trip 58
Fig. 3.32 Comparison of measured and predicted pressure heads in the air chamber for 1 pump trip of Hwajeon 1st booster pumping station 59
Fig. 3.33 Comparison of measured and predicted pressure heads in the air chamber for 3 pumps trip of Hwajeon 1st booster pumping station 59
Fig. 3.34 Longitudinal pipeline profile and simulated nodes from Hwajeon 2nd booster pumping station to the inlet of SaBuk tunnel 61
Fig. 3.35 Air chamber & waterhammer test of Hwajeon 2nd booster pumping station 61
Fig. 3.36 Waterhammer test results for 1 pump trip 64
Fig. 3.37 Waterhammer test results for 3 pumps trip 64
Fig. 3.38 Comparison of measured and predicted pressure heads in the air chamber for 1 pump trip of Hwajeon 2nd booster pumping station 65
Fig. 3.39 Comparison of measured and predicted pressure heads in the air chamber for 3 pumps trip of Hwajeon 2nd booster pumping station 65