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A- Calculate the energy requirements and rotation speed of the rapid- mix basin to treat a flow 8500 m³/d with detention time(d.t) 20 sec. and velocity gradient(G)1000/sec. Use a four- blade turbine mixer with an impeller diameter of 0.7 m. The gear efficiency is 90% and the ratio of blade width to blade diameter is 0.2. (Assume u-1.3097×10³) N.s/m²).

A- Calculate the energy requirements and rotation speed of the rapid- mix basin to treat a flow 8500 m³/d with detention time(d.t) 20 sec. and velocity gradient(G)1000/sec. Use a four- blade turbine mixer with an impeller diameter of 0.7 m. The gear efficiency is 90% and the ratio of blade width to blade diameter is 0.2. (Assume u-1.3097×10³) N.s/m²).

Structural Analysis
Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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A- Calculate the energy requirements and rotation speed of the rapid- mix basin to treat a flow 8500 m³/d with detention time(d.t) 20 sec. and velocity gradient(G)1000/sec. Use a four- blade turbine mixer with an impeller diameter of 0.7 m. The gear efficiency is 90% and the ratio of blade width to blade diameter is 0.2. (Assume u-1.3097×10³) N.s/m²). B- A small WTP consists of one rapid mix tank.The required power is(35) hp (µ-1.13×10³) N.s/m². Calculate the volume needed for the tank to achieve a minimum cost. (1hp-743 watt)
Transcribed Image Text:A- Calculate the energy requirements and rotation speed of the rapid- mix basin to treat a flow 8500 m³/d with detention time(d.t) 20 sec. and velocity gradient(G)1000/sec. Use a four- blade turbine mixer with an impeller diameter of 0.7 m. The gear efficiency is 90% and the ratio of blade width to blade diameter is 0.2. (Assume u-1.3097×10³) N.s/m²). B- A small WTP consists of one rapid mix tank.The required power is(35) hp (µ-1.13×10³) N.s/m². Calculate the volume needed for the tank to achieve a minimum cost. (1hp-743 watt)
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