표제지
목차
Nomenclatures 13
I. 서론 14
1.1. 연구배경 14
1.2. 연구내용 및 목적 17
1.3. 국내 연구동향 18
1.4. 해외 연구 동향 30
II. 이론적 배경 34
2.1. 밸브 이론 34
2.1.1. 유출계수 τ 34
2.1.2. 손실계수 35
2.1.3. 손실계수 K 의미 37
2.1.4. 유량계수(CV)(이미지참조) 45
2.1.5. 유량계수(KV)(이미지참조) 46
2.1.6. 유량계수(AV)(이미지참조) 46
2.1.7. 밸브 손실계수와 유량계수들의 상관관계 47
2.1.8. 밸브 유량특성 52
2.1.9. 고유유량특성 52
2.1.10. 유효유량특성 55
III. 밸브 유량계수 실험장치 60
3.1. 밸브 유량계수 실험장치 구성 60
3.2. 밸브 유량계수 실험장치 계측기 61
1) 유량계 61
2) 압력계 및 전송기 62
3.3. 밸브 유량계수 실험장치 검증 63
3.4. 수동 볼 밸브 유량계수 실험 결과 66
IV. 밸브 유동해석 68
4.1. 수치해석 방법 68
4.2. 지배방정식 68
4.3. 수치 알고리즘 70
4.4. 수동 볼 밸브 유동해석 방법 70
4.5. 수동 볼 밸브 유동해석 결과 73
4.6. 1인치 자동제어 볼 밸브 유동해석 결과 76
1) 유동해석 모델 76
2) 유동해석 격자 77
3) 유동해석 경계조건 78
4) 유동해석 변수 79
5) 볼 밸브 유동해석 결과 81
4.7. 1인치 자동제어 글로브 밸브 유동해석 결과 92
1) 유동해석 모델 92
2) 유동해석 격자 93
3) 유동해석 경계조건 95
4) 유동해석 변수 95
5) 글로브 밸브 유동해석 결과 97
V. 밸브 유량계수 실험 110
5.1. 1인치 자동제어 볼 밸브 유량계수 측정 110
5.2. 1인치 자동제어 볼 밸브 유량특성 112
1) 유량 Q=6.5㎥/h일 경우 112
2) 유량 Q=5.7㎥/h일 경우 117
3) 유량 Q=5.0㎥/h일 경우 123
4) 유량 Q=4.0㎥/h일 경우 128
5) 유량 Q=3.5㎥/h일 경우 134
6) 전체비교 139
5.3. 1인치 자동제어 글로브 밸브 유량계수 측정 143
1) 유량 Q=5.0㎥/h일 경우 145
2) 유량 Q=4.5㎥/h일 경우 150
3) 유량 Q=4.0㎥/h일 경우 155
4) 유량 Q=3.5㎥/h일 경우 160
5) 유량 Q=3.0㎥/h일 경우 165
6) 전체비교 170
5.4. 자동제어 볼 밸브와 글로브 밸브 유량특성 비교 174
IV. 결론 178
참고문헌 180
APPENDIX 187
국문요약 193
ABSTRACT 195
Table 2-1. Loss factor of Deployment Valve in full Turbulent flow 39
Table 2-2. Loss factor K to change in the butterfly valve 49
Table 2-3. Flow coefficient KV(D=400㎜) change of the butterfly valve(이미지참조) 51
Table 2-4. Flow coefficient KV and flow rate Q(D=400mm) in butterfly valve(이미지참조) 51
Table 2-5. Valve flow rate considering tube loss Cp(D=400mm)(이미지참조) 57
Table 2-6. Flow rate considering pipe loss Cp(이미지참조) 58
Table 3-1. Calibration of ball valve test measurement sensor 65
Table 3-2. Comparison of Cv value with experimental results and manufacture catalog data 67
Table 4-1. Valve opening ratio and valve angle 80
Fig. 1-1. Systematic diagram of thermal power plant 14
Fig. 1-2. Valve for De super-heating control valve 15
Fig. 1-3. Valve for re-heating control valve 15
Fig. 1-4. Boiler soot blower C/V 16
Fig. 1-5. BFPT C/V 16
Fig. 1-6. Generator seal oil C/V 16
Fig. 1-7. Valve flow curve comparison 17
Fig. 2-1. Effect of partial opening of glove valve on loss coefficient 40
Fig. 2-2. Effect of Gate valve partial changes on loss coefficient 40
Fig. 2-3. Effect of Diaphragm valve partial changes on loss coefficient 41
Fig. 2-4. Effect of partial opening of Butterfly valve on loss coefficiet 41
Fig. 2-5. Loss factor at Gate valve deployment with reduced-extension part 43
Fig. 2-6. Valve Flow Characteristics 52
Fig. 2-7. Example of the specific flow coefficient of the Butterfly valve 53
Fig. 2-8. Correlation of flow, valve opening and pressure loss in pumping system 54
Fig. 2-9. The Relationship between Water supply and valve 56
Fig. 2-10. Characteristics of Effective Flow rate in Butterfly valve 59
Fig. 3-1. Experimental setup for valve flow coefficient measurement 60
Fig. 3-2. Electronic flowmeter and measurement principle 61
Fig. 3-3. Electronic pressure transmitter 62
Fig. 3-4. Pressure gage 62
Fig. 3-5. Small manual ball valve for verification 63
Fig. 3-6. Catalog data for verification test models 63
Fig. 3-7. Manual ball valve test parameters for testing equipment verification 64
Fig. 3-8. Results of data acquisition for manual ball valve 66
Fig. 4-1. Flow analysis parameters of manual ball valve 71
Fig. 4-2. CFD modeling process of manual ball valve 71
Fig. 4-3. Generating Volume mesh process of manual ball valve 72
Fig. 4-4. CFD boundary condition of manual ball valve 72
Fig. 4-5. Comparison of pressure distributions for manual ball valve 73
Fig. 4-6. Comparison of velocity distributions for manual ball valve 74
Fig. 4-7. Comparison of Cv value with experimental results and manufacturer catalog... 75
Fig. 4-8. Configuration of 1-inch ball valve and 3D modeling 76
Fig. 4-9. Fluid region and FVM model for 1-inch ball valve 76
Fig. 4-10. Precess for final volume mesh 78
Fig. 4-11. Boundary conditions for 1-inch ball valve 78
Fig. 4-12. CFD parameters for 1-inch ball valve 80
Fig. 4-13. Comparison of static pressure contour at horizontal section 83
Fig. 4-14. Comparison of static pressure contour at ball surface 84
Fig. 4-15. Comparison of velocity streamline 87
Fig. 4-16. Comparison of velocity particle tracking 90
Fig. 4-17. Result of Cv distribution according to valve opening ratio 91
Fig. 4-18. Configuration of 1-inch glove valve and 3D modeling 92
Fig. 4-19. Fluid region and FVM model for 1 -inch glove valve 93
Fig. 4-20. Precess of final volume mesh for 1-inch glove valve 94
Fig. 4-21. Boundary conditions for 1-inch glove valve 95
Fig. 4-22. CFD parameters for 1-inch glove valve 96
Fig. 4-23. Comparison of static pressure contour at 1-inch glove valve 100
Fig. 4-24. Comparison of velocity stream line at 1-inch glove valve 104
Fig. 4-25. Comparison of velocity particle tracking at 1-inch glove valve 108
Fig. 4-26. Result of Cv distribution according to valve opening ratio in 1-inch glove... 109
Fig. 5-1. Configuration of 1-inch control ball valve and 2D drawing 110
Fig. 5-2. Experiment setup for 1-inch control ball valve 111
Fig. 5-3. Distribution of flow coefficient at Q=6.5㎥/h 113
Fig. 5-4. Distributions of flow rate at Q=6.5㎥/h 113
Fig. 5-5. Comparison of valve inlet and outlet pressure at Q=6.5㎥/h 114
Fig. 5-6. Distributions of pressure drop at Q=6.5㎥/h 114
Fig. 5-7. Distributions of flow coefficient and flow rate at Q=6.5㎥/h 116
Fig. 5-8. Distributions of flow coefficient and pressure drop at Q=6.5㎥/h 116
Fig. 5-9. Distribution of flow coefficient Cv at Q=5.7㎥/h 118
Fig. 5-10. Distributions of flow rate at Q=5.7㎥/h 119
Fig. 5-11. Comparison of valve inlet and outlet pressure at Q=5.7㎥/h 119
Fig. 5-12. Distributions of pressure drop at Q=5.7㎥/h 120
Fig. 5-13. Distributions of flow coefficient and flow rate at Q=5.7㎥/h 122
Fig. 5-14. Distributions of flow coefficient and pressure drop at Q=5.7㎥/h 122
Fig. 5-15. Distribution of flow coefficient Cv at Q=5.0㎥/h 124
Fig. 5-16. Distributions of flow rate at Q=5.0㎥/h 124
Fig. 5-17. Comparison of valve inlet and outlet pressure at Q=5.0㎥/h 125
Fig. 5-18. Distributions of pressure drop at Q=5.0㎥/h 125
Fig. 5-19. Distributions of flow coefficient and flow rate at Q=5.0㎥/h 127
Fig. 5-20. Distributions of flow coefficient and pressure drop at Q=5.0㎥/h 127
Fig. 5-21. Distribution of flow coefficient Cv at Q=4.0㎥/h 130
Fig. 5-22. Distributions of flow rate at Q=4.0㎥/h 130
Fig. 5-23. Comparison of valve inlet and outlet pressure at Q=4.0㎥/h 131
Fig. 5-24. Distributions of pressure drop at Q=4.0㎥/h 131
Fig. 5-25. Distributions of flow coefficient and flow rate at Q=4.0㎥/h 132
Fig. 5-26. Distributions of flow coefficient and pressure drop at Q=4.0㎥/h 132
Fig. 5-27. Distribution of flow coefficient Cv at Q=3.5㎥/h 135
Fig. 5-28. Distributions of flow rate at Q=3.5㎥/h 135
Fig. 5-29. Comparison of valve inlet and outlet pressure at Q=3.5㎥/h 136
Fig. 5-30. Distributions of pressure drop at Q=3.5㎥/h 136
Fig. 5-31. Distributions of flow coefficient and flow rate at Q=3.5㎥/h 138
Fig. 5-32. Distributions of flow coefficient and pressure drop at Q=3.5㎥/h 138
Fig. 5-33. Comparison of flow coefficient according to valve opening ratio 140
Fig. 5-34. Comparison of flow rate according to valve opening ratio 140
Fig. 5-35. Comparison of pressure drop according to valve opening ratio 141
Fig. 5-36. Comparison of flow coefficient according to flow rate 141
Fig. 5-37. Comparison of flow coefficient according to pressure drop 142
Fig. 5-38. Configuration of 1-inch control glove valve and 2D drawing 143
Fig. 5-39. Experiment setup for 1-inch control glove valve 144
Fig. 5-40. Distribution of flow coefficient by 1-inch control glove valve at Q=5.0㎥/h 147
Fig. 5-41. Distribution of flow rate by 1-inch control glove valve at Q=5.0㎥/h 147
Fig. 5-42. Distribution of pressure drop by 1-inch control glove valve at Q=5.0㎥/h 148
Fig. 5-43. Distributions of flow coefficient and flow rate at Q=5.0㎥/h 148
Fig .5-44. Distributions of flow coefficient and pressure drop at Q=5.0㎥/h 149
Fig. 5-45. Distribution of flow coefficient by 1-inch control glove valve at Q=4.5㎥/h 152
Fig. 5-46. Distribution of flow rate by 1-inch control glove valve at Q=4.5㎥/h 152
Fig. 5-47. Distribution of pressure drop by 1-inch control glove valve at Q=4.5㎥/h 153
Fig. 5-48. Distributions of flow coefficient and flow rate by 1-inch control glove valve... 153
Fig. 5-49. Distributions of flow coefficient and pressure drop by 1-inch control glove... 154
Fig. 5-50. Distribution of flow rate by 1-inch control glove valve at Q=4.0㎥/h 157
Fig. 5-51. Distribution of flow rate by 1-inch control glove valve at Q=4.0㎥/h 157
Fig. 5-52. Distribution of pressure drop by 1-inch control glove valve at Q=4.0㎥/h 158
Fig. 5-53. Distributions of flow coefficient and flow rate by 1 inch control glove valve... 158
Fig. 5-54. Distributions of flow coefficient and pressure drop by 1 inch control glove... 159
Fig. 5-55. Distribution of flow coefficient by 1-inch control glove valve at Q=3.5㎥/h 162
Fig. 5-56. Distribution of flow rate by 1-inch control glove valve at Q=3.5㎥/h 162
Fig. 5-57. Distribution of pressure drop by 1-inch control glove valve at Q=3.5㎥/h 163
Fig. 5-58. Distributions of flow coefficient and flow rate by 1 inch control glove valve... 163
Fig. 5-59. Distributions of flow coefficient and pressure drop by 1 inch control glove... 164
Fig. 5-60. Distribution of flow coefficient by 1-inch control glove valve at Q=3.0㎥/h 167
Fig. 5-61. Distribution of flow rate by 1-inch control glove valve at Q=3.0㎥/h 167
Fig. 5-62. Distribution of pressure drop by 1-inch control glove valve at Q=3.0㎥/h 168
Fig. 5-63. Distributions of flow coefficient and flow rate by 1-inch control glove valve... 168
Fig. 5-64. Distributions of flow coefficient and pressure drop by 1-inch control glove... 169
Fig. 5-65. Comparison of flow coefficient according to valve opening ratio at glove valve 171
Fig. 5-66. Comparison of flow rate according to valve opening ratio at glove valve 171
Fig. 5-67. Comparison of pressure drop according to valve opening ratio at glove valve 172
Fig. 5-68. Comparison of flow coefficient according to flow rate at glove valve 172
Fig. 5-69. Comparison of flow coefficient according to pressure drop at glove valve 173
Fig. 5-70. Comparison of ball and glove valve 174
Fig. 5-71. Comparison of Cv coefficient for ball and glove valve according to opening ratio 175
Fig. 5-72. Comparison of flow rate for ball and glove valve according to opening ratio 175
Fig. 5-73. Comparison of pressure drop for ball and glove valve according to opening ratio 176
Fig. 5-74. Comparison of Cv coefficient for ball and glove valve according to flow rate 176
Fig. 5-75. Comparison of Cv coefficient for ball and glove valve according to pressure drop 177