Help with the attached fluid mechanics problems. Develop the system curve by cal

Question

Help with the attached fluid mechanics problems.

Develop the system curve by calculating HA at various flow rates for the system given, and plot the values on the attached Pump Characteristic Curve and determine the flow rate (1/min), head (m), and BHP (kw) at which this pump will operate in this system. , , ANS with the pump curves given, develop an efficiency curve for the pump and determine the maximum efficiency and the efficiency at which the pump system will operate. Given the system shown, calculate the flow rate from the tank. Neglect all minor losses except the globe valve, which is wide open. Recognize this as a Class II Problem with a two pipe parallel flow included. Make appropriate assumptions initially and iterate to determine the correct flow rate. The pipe is schedule 40 commercial steel. ANS

Explanation / Answer

Pbhp = ( ? Q h / 33000 ) / ?

where

Pbhp = brake horse power (horsepower, hp)

Q = volume flow rate (ft3/min, cfm)

? = overall efficiency

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