COMPLEX COMMISSIONING AND QUANTITATIVE TESTING GOTTHARD BASE TUNNEL VENTILATION SYSTEM
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1 COMPLEX COMMISSIONING AND QUANTITATIVE TESTING GOTTHARD BASE TUNNEL VENTILATION SYSTEM 8 th International Conference Tunnel Safety & Ventilation 2016 Martin Viertel
2 OVERVIEW Gotthard Base Tunnel Ventilation System Commissioning Examples Conclusion 2
3 OVERVIEW OF THE GOTTHARD BASE TUNNEL 3
4 OVERVIEW OF THE VENTILATION SYSTEM East tube Emergency Station West tube 1 of 44 ventilation strategies 4
5 OVERVIEW OF THE VENTILATION SYSTEM East tube Emergency Station West tube 1 of 44 ventilation strategies Exhaust air shaft cross section Damper Emergency Station 5
6 OVERVIEW OF THE VENTILATION SYSTEM Fresh air fans in Sedrun Exhaust air dampers above the emergency station 6
7 OVERVIEW OF THE VENTILATION SYSTEM Emergency Station Sedrun West (1 of 4) Exhaust air shafts above the emergency station 7
8 WHAT WE DO COMMISSIONING PHASES F.A.T. Standalone tests Component interaction tests Emulated tests with MMI and functional tests. Installation, Commissioning Stepwise functional tests Integration tests Combined functional tests Fine tuning of components Validation testing (8 Months 3000 Tests) Verification of set goals Proof of relevant operation requirements of the tunnel 8
9 WHAT WE (ALSO) DO COMMISSIONING PHASES F.A.T. Standalone tests Component interaction tests Installation, Commissioning Stepwise functional tests Integration tests Fine tuning of components Validation testing Verification of set goals Proof of relevant operation requirements of the tunnel 9
10 EXAMPLE: LEAKAGE FLOW MEASUREMENTS Model of leakage in ducts Choice of measurement concept p measurement Flow measurements Characteristic parameter fitting - Extrapolation - Tracking leakage over time AV Exhaust Duct Faido Exhaust flow Ventilation Station Faido MFS Faido AV Leakage flow Fresh air Faido Gallery (Fresh air duct) 10
11 EXAMPLE: LEAKAGE FLOW MEASUREMENTS Model of leakage in ducts Choice of measurement concept p measurement Flow measurements Characteristic parameter fitting - Extrapolation - Tracking leakage over time Linear (Laminar) Model Quadratic (Turbulent) Model 11
12 EXAMPLE: LEAKAGE FLOW MEASUREMENTS Uncertainty analysis CFD Velocity profile Model of leakage in ducts Choice of measurement concept p measurement Flow measurements Characteristic parameter fitting - Extrapolation - Tracking leakage over time Exhaust Duct Faido AV Ventilation Station Faido AV DP Exhaust flow + Leakage flow Massflow 1 Leakage flow Faido Gallery (Fresh air duct) Exhaust flow DP Massflow 2 MFS Faido All exhaust dampers CLOSED 12
13 EXAMPLE: LEAKAGE FLOW MEASUREMENTS 13
14 Deviation of models from measured leakage [%] EXAMPLE: LEAKAGE FLOW MEASUREMENTS Model of leakage in ducts 80.00% Choice of measurement concept p measurement Flow measurements Characteristic parameter fitting - Extrapolation - Tracking leakage over time 70.00% 60.00% 50.00% 40.00% 30.00% 20.00% 10.00% 0.00% % % % % Drawing against CLOSED exhaust dampers Mean differential pressure [Pa] Rel Dev Mix [%] Rel Dev Lam [%] Rel Dev Turb [%] Drawing against OPEN exhaust dampers 14
15 COMMISSIONING PHASES F.A.T. Standalone tests Component interaction tests Installation, Commissioning Stepwise functional tests Integration tests Fine tuning of components Validation testing Verification of set goals Proof of relevant operation requirements of the tunnel 15
16 COMMISSIONING PHASES F.A.T. Standalone tests Component interaction tests Installation, Commissioning Stepwise functional tests Integration tests Fine tuning of components Validation testing Verification of set goals Proof of relevant operation requirements of the tunnel 16
17 VALIDATION TESTING: FIRE SIMULATIONS IN EMERGENCY STATIONS 17
18 VALIDATION TESTING: DIFFERENTIAL PRESSURE SAMPLING 18
19 CONCLUSION, APPLICATIONS TO OTHER TUNNELS GBT is a complex system Model your system before measuring Single-Point Volume Flow measurements: Integration of CFD Simple and cost effective Fire Tests with smoke generators and firetrainer 19
20 Consulting. Engineering. Projects. Operations.
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