Question: 1 0 - m 3 reactor ( D = 2 . 0 - m ) has a 4 - blade 4 5 pitched impeller with

10-m3 reactor (D=2.0-m) has a 4-blade 45 pitched impeller with a diameter of 1-m and rotates at 100-RPM. It is proposed that the impeller be replaced with a similar but larger one 1.2-m in diameter. No change to number of blades, pitch, or W/d ratio. What is the percentage change in power input that would be needed with the new impeller?

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