Power for Agitation and Scale-Up. A turbine agitator having six flat blades and a disk has a diameter of 0.203 m and is used in a tank having a diameter of 0.61 m and height of 0.61 m. The width W = 0.0405 m. Four baffles are used having a width of 0.051 m. The turbine operates at 275 rpm in a liquid having a density of 909 kg/m³ and viscosity of 0.020 Pa · s. (a) Calculate the kW power of the turbine and kW/m³ of volume. (b) Scale up this system to a vessel having a volume of 100 times the original for the case of equal mass transfer rates. %3D 245 kW/m3
Power for Agitation and Scale-Up. A turbine agitator having six flat blades and a disk has a diameter of 0.203 m and is used in a tank having a diameter of 0.61 m and height of 0.61 m. The width W = 0.0405 m. Four baffles are used having a width of 0.051 m. The turbine operates at 275 rpm in a liquid having a density of 909 kg/m³ and viscosity of 0.020 Pa · s. (a) Calculate the kW power of the turbine and kW/m³ of volume. (b) Scale up this system to a vessel having a volume of 100 times the original for the case of equal mass transfer rates. %3D 245 kW/m3
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:3.4-2. Power for Agitation and Scale-Up. A turbine agitator having six flat blades and a
disk has a diameter of 0.203 m and is used in a tank having a diameter of 0.61 m
and height of 0.61 m. The width W = 0.0405 m. Four baffles are used having a
width of 0.051 m. The turbine operates at 275 rpm in a liquid having a density of
909 kg/m³ and viscosity of 0.020 Pa -s.
(a) Calculate the kW power of the turbine and kW/m³ of volume.
(b) Scale up this system to a vessel having a volume of 100 times the original for
the case of equal mass transfer rates.
Ans. (a) P = 0.1508 kW, P/V = 0.845 kW/m',
(b) P2
= 15.06 kW, P2/V2 = 0.845 kW/m³
%3D
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