Re: surge question

From: <Erik>
Date: Sun Dec 21 2003 - 12:24:00 EST

Hi Omid,

What kind of tank are you talking about? Is it an accumulator or a bladder or a vented air vessel? What are the pump characteristics? (Curve, Moment of Inertia,...)

Erik

-------Original Message-------

From: PipingDesign@yahoogroups.com
Date: zondag 21 december 2003 15:31:59
To: pipingdesign@yahoogroups.com
Subject: [PipingDesign] surge question

Hi

I am working as Design engineer in a consultant engineers, I am modeling a waste water pump station the flow rate is about 1.86 cu meter per sec. for surge analysis I assumed that all 3 pumps will tripped and from the down and up surge analysis , I find out that a 55 cubic meter tank is enough to surge shaving, from the software I got that around 5 to 6 min needed to eliminated all the surge effects but my colleague who has 18 years experiences says that just 5 sec needed can any body help me ?(the whole net is around 2.5 km). also for restarting I got from the software that 1 pump restarting is most critical from 3 pumps restarting (although I know that it is impossible to restart all 3 pumps together). Does it make sense?

Best regards

Omid

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[Non-text portions of this message have been removed] Received on Sun Dec 21 12:24:00 2003