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0 ft. Impeller Diameter (D) = 3.0 ft. Impeller type = Flat blade turbine. # of blades = 6 Blade width (W) =7 inches. Blade length (L) = 9 inches. Number of Baffles = 4; equally spaced. Baffle width (B) = 11 inches. Liquid Depth (H) = 9.0 feet. Impeller height above vessel bottom (Z) = 3 feet.(a) 2, 400 rph(b) 4, 500 rph(c) 3, 500 rph(d) 3, 600 rphThis question was posed to me by my school principal while I was bunking the class.The above asked question is from Power Requirements for Mixing in division Fluid Flow and Mixing of Bioprocess Engineering |
Answer» RIGHT choice is (d) 3, 600 rph For explanation: N = revolutions per hour (rph). The AGITATION speed is given in the example as 60 revolutions per minute, which when MULTIPLIED by 60 minutes/hr yields: N = 60 RPM * 60 = 3,600 rph. |
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