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Rainwater pipe in wall

Rainwater pipe in wall

Rainwater pipe in wall

(OP)
Hi,

I have an internal open plantwell with a 100mm pipe disappearing through a wall at floor level (fall unknown!). This pipe i think then bends vertically down and drops down a riser.
Can anyone advise on the calculation required to work out how much water this pipe will remove?

Thanks

Lee

RE: Rainwater pipe in wall

Pipe flow according to Bernoulli.
At constant velocity,
Z + P1/γ/H1 - HL = Z + P2/γ/H2
Use any appropriate flow equation to calculate Head Loss, HL.

Reduce the flow by some appropriate amount that depends on if there is a screen or grating or some other entry conditions for the water going into the pipe.

**********************
"Pumping accounts for 20% of the world's energy used by electric motors and 25-50% of the total electrical energy usage in certain industrial facilities."-DOE statistic (Note: Make that 99% for pipeline companies) http://virtualpipeline.spaces.live.com/

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