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Estimate the flow rate in the simple piping system of following figure (a) if the pump characteristic curves (b) are as shown below

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Estimate the flow rate in the simple piping system of following figure (a) if the pump characteristic curves (b) are as shown below. Find the pump power requirement.

H,

Oo 80 ~ g0

e e190 m ~ np

a . oo 60

x Np

40 40

Wrought

> 100 pipe eo adam 20 20

20 cm

Water 0.1 0.2 0.3

20°C Q (a's)

400 m (b)

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Hint: You can assume that Reynolds Number is sufficiently large that the flow is completely turbulent. So you can assume the friction factor, considering Re and ¢/D (e: roughness of wrought iron pipe). Then you

• need to write energy equation, considering pump and you have to guess your volumetric flow rate by using chart (b) and equation found. Then you can find the pump power requirement by using efficiency of pump, stated in chart