Room- and installation limitations Exhaust 2140x2140 ø2522 6000 AS-01 CFD calculations to optimize inlet and outlet shape (ILF) Wire mesh 6 th Conference “Tunnel Safety and Ventilation” Graz 22-24 April 2012 7 2140 x 2140
Room- and installation limitations 2140x2140 Tauern Exhaust Fan AS01 (Impellerdiameter 2510 mm.) Optimum Duct lay-out Component Volume m3/s ø2522 6000 Duct m2. v m/s 2140 x 2140 P-dyn. Pa ζ [ - ] Inlet part: Screen 160 4,84 33,06 639,30 0,10 63,93 9,00 17,78 184,89 0,10 18,49 Inlet piece 160 4,84 33,06 639,30 0,05 31,97 9,00 17,78 184,89 0,09 16,64 Discharge duct / Diffuser: Inlet 160 3,38 47,36 1312,22 3,38 47,36 1312,22 Outlet 160 3,27 48,89 1398,25 4,61 34,67 703,26 Efficiency / factor 160 0,15 12,90 0,15 91,34 Impuls losses 3>4 With innerpipe 160 3,71 43,13 1088,28 5,05 31,67 586,87 Without innerpipe 160 4,84 33,06 639,30 60,89 6,18 25,88 391,87 20,13 Fan isolation dampe 160 3,71 43,13 1088,28 0,25 272,07 9,00 17,78 184,89 0,25 46,22 Total Fan pressure losses 441,76 192,82 In- and outlet concrete duct losses (based on assumption of 1,5 x dynamic loss) 958,95 277,33 Total losses 1400,71 470,15 Fan Power at 85% efficiency 263,66 88,50 6 th Conference “Tunnel Safety and Ventilation” Graz 22-24 April 2012 8 3000x3000 ∆P Pa 450 2000 Duct m2. 2570 v m/s 9000 ø2522 P-dyn. Pa 3540 (FMU) ζ [ - ] ∆P Pa