CWEV201 Water Engineering Assignment

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Reference no: EM133128260

CWEV201 Water Engineering - Nelson Mandela University

Assignment: Pipe flow and energy losses

Figure 6 on Annexure F shows a gravitational water PVC-pipeline connected to an elevated water tank at a to the outlet at j, where a valve controls the outflow. A pump at e supplies an input pressure of 13,6 m to the pipe system. Pipe detail is tabulated below:

Pipe numbered	Inside diameter (mm)	Length (m)	D'Arcy friction factor (f)
1 (from a to c)	200	46	0,007
from c to i	Ignore friction - only refer to the minor losses
2 (from i to j)	200	247	0,007

Minor energy losses will occur at points marked from (a) to (j) with all relevant detail tabulated below:

Position: minor loss	Description	Position: minor loss	Description
a	Smooth pipe entrance with 20 mm radius	f	Pressure meter with a loss coefficient (k) of 2,3
b	900 bend with a long radius of 350 mm	g	Flow meter with a loss coefficient (k) of 3,4

Smooth pipe

contraction to 75 mm with θ = 600

300 pipe bend with r/d = 1

Sluice valve, fully open

Sudden (sharp) pipe

expansion to 200 mm

Pump with a total head

loss of 200 mm

Globe valve, 25% open

a) Determine all the minor losses coefficients (K) for the above system by filling in all necessary data on Annexure E which needs to be handed back for evaluation. Work up to 3 decimal values.

b) Apply the energy-principle on the given system and determine the discharge (outflow) at j, considering all the minor and frictional losses.

Reference no: EM133128260

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