A flat-blade turbine agitator with a disk having six blades is installed in a tank. The tank diameter is 1.83 m, the turbine diameter is 0.61 m and the width W is 0.122 m. The tank contains four baffles, each having a width J of 0.15 m. The turbine is operated at 90 rpm and the liquid in the tank has a viscosity of 10 cP and a density of 929 kg/m3. a) Calculate the required power (in kW) of the mixer. b) For the same conditions, except for the solution having a viscosity of 100,000 cP, calculate the required power (in kW). c) Predict the mixing time for the turbine system. b) Using the same system, but with a tank that has a volume of 10 m3 and the same power/unitary volume, predict the new mixing time.

Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
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 A flat-blade turbine agitator with a disk having six blades is installed in a tank. The tank diameter is 1.83 m, the turbine diameter is 0.61 m and the width W is 0.122 m. The tank contains four baffles, each having a width J of 0.15 m. The turbine is operated at 90 rpm and the liquid in the tank has a viscosity of 10 cP and a density of 929 kg/m3.

  • a) Calculate the required power (in kW) of the mixer.
  • b) For the same conditions, except for the solution having a viscosity of 100,000 cP, calculate the required power (in kW).
  • c) Predict the mixing time for the turbine system.
  • b) Using the same system, but with a tank that has a volume of 10 m3 and the same power/unitary volume, predict the new mixing time.
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