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Power Requirement (agitator And High-torque Stirrer)

School of Chemical Engineering and Chemistry Mapua Institute of Technology Chemical Engineering Laboratory 1 COMPUTATION ã For Fluid A: Unbaffled Vessel N = 160 rev/min x 1 min/60 s = 2.67 rev/s NRe = NDi2ρ / µ = (2.67 rev/s)(0.127 m)2(1000 kg/m3) / 0.0008 kg/m·s NRe = 53763.33 NPo = 1.7 NPo = Pgc / N3Di5ρ P = NPoN3Di5ρ / gc = (1.7)(2.67 rev/s)3(0.127 m)5(1000 kg/m3) / 1 kg·m/s2/N P = 1.07 N·m/s Baffled Vessel N = 132 rev/min x 1 min/60 s = 2.2 rev/s NRe = NDi2ρ / µ = (2.2 rev/s)(0.127 m)2(1000

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  School of Chemical Engineering and ChemistryMapua Institute of TechnologyChemical Engineering Laboratory 1 COMPUTATION ã For Fluid A:Unbaffled Vessel N = 160 rev/min x 1 min/60 s = 2.67 rev/s N Re = NDi 2 ρ / µ= (2.67 rev/s)(0.127 m) 2 (1000 kg/m 3 ) / 0.0008 kg/m·s N Re = 53763.33 N Po = 1.7 N Po = Pg c / N 3 Di 5 ρP = N Po  N 3 Di 5 ρ / g c = (1.7)(2.67 rev/s) 3 (0.127 m) 5 (1000 kg/m 3 ) / 1 kg·m/s 2 /NP = 1.07 N·m/sBaffled Vessel N = 132 rev/min x 1 min/60 s = 2.2 rev/s N Re = NDi 2 ρ / µ= (2.2 rev/s)(0.127 m) 2 (1000 kg/m 3 ) / 0.0008 kg/m·s N Re = 44354.75 N Po = 7 N Po = Pg c / N 3 Di 5 ρP = N Po  N 3 Di 5 ρ / g c = (7)(2.2 rev/s) 3 (0.127 m) 5 (1000 kg/m 3 ) / 1 kg·m/s 2 /NP = 2.463 N·m/s  School of Chemical Engineering and ChemistryMapua Institute of TechnologyChemical Engineering Laboratory 1 ã For Fluid B:Unbaffled Vessel N = 130 rev/min x 1 min/60 s = 2.17 rev/s N Re = NDi 2 ρ / µ= (2.17 rev/s)(0.127 m) 2 (1000 kg/m 3 ) / 0.0008 kg/m·s N Re = 43682.71 N Po = 1.8 N Po = Pg c / N 3 Di 5 ρP = N Po  N 3 Di 5 ρ / g c = (1.8)(2.17 rev/s) 3 (0.127 m) 5 (1000 kg/m 3 ) / 1 kg·m/s 2 /NP = 0.571 N·m/sBaffled Vessel N = 125 rev/min x 1 min/60 s = 2.083 rev/s N Re = NDi 2 ρ / µ= (2.083 rev/s)(0.127 m) 2 (1000 kg/m 3 ) / 0.0008 kg/m·s N Re = 42002.6 N Po = 7 N Po = Pg c / N 3 Di 5 ρP = N Po  N 3 Di 5 ρ / g c = (7)(2.083 rev/s) 3 (0.127 m) 5 (1000 kg/m 3 ) / 1 kg·m/s 2 /NP = 2.09 N·m/s  School of Chemical Engineering and ChemistryMapua Institute of TechnologyChemical Engineering Laboratory 1 GRAPH Graph 1 010203040506070800102030 Speed Setting    P  o  w  e  r   R  e  q  u   i  r  e  m  e  n   t ,   W Fluid A - UnbaffledFluid A - Baffled Graph 2 0102030405060700102030 Speed Setting    P  o  w  e  r   R  e  q  u   i  r  e  m  e  n   t ,   W Fluid B - UnbaffledFluid B - Baffled  School of Chemical Engineering and ChemistryMapua Institute of TechnologyChemical Engineering Laboratory 1 Graph 3 05101520250102030 Speed Setting    P  o  w  e  r   R  e  q  u   i  r  e  m  e  n   t ,   W Fluid A - UnbaffledFluid B - Unbaffled Graph 4 010203040506070800102030 Speed Setting    P  o  w  e  r   R  e  q  u   i  r  e  m  e  n   t ,   W Fluid A - BaffledFluid B - Baffled