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Project example: WET RISER SYSTEM

This implementation example demonstrates the pipe frictional loss and pump head calculations obtained by ePF Loop program.

System design: 3 stacks of rising main.

Water supply requirement: (38 + 19 + 19) l/s = 76 l/s = 4560 LPM (total pump flowrate).

Minimum operating pressure at landing valve: 3.5 bars (all landing valves are fitted with PRV).

Wet Riser pipe diameter and material coefficient: see results print-out below.

Change in elevation height: pumps located at 1st Storey (RL 116.925 m); highest landing valve at Upper Roof (RL 196.90 m) + 1m (landing valve height) = 80.975 m.

Worst case (hydraulically the most unfavorable situated): The landing valve at Upper Roof of Stair 1.

isometric sketch of Wet Riser system  . . .

Results: 

Pipe frictional loss results ... 

PUMP CURVE & SYSTEM CURVE

The following system curve with pump curve is done with CurveFit Tracer program.

>> see results comparison example: ePF Loop vs a 3rd party program 

>> Application example (2-Loop ):  Two-loop pipe network flow and pressure drop analysis

>> worked example (2-Loop): Two-loop Hydrant ring main pipe pressure drop analysis

>> worked example (Series + Loop): Hydrant ring main system 

>> worked example (Series): Water pumping main system

>> Analysis example: see Loop pipe ring main.

>> Steam pipe pressure drop example: see Pressure loss in steam pipe.