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jitu_gla
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Join Date: Jan 2010
Posts: 8

Pipeline Design

02/02/2010 12:07 PM

sir, i want to know how the pipeing will be designed data given ; head-22m,discharge-1750m3/hr,no of pumps-2 and we have to design common pipe line for that. we need to deliver water at 10m for condenserof discharge discharge-34500m3/hr tell me in detail how step by step design will we done, what will be the max velocity of water for this system
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CaptMoosie
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#1

Re: Pipeline Design

02/03/2010 1:45 AM

looks like and smells like a homework problem to me>>>>i suggest you open up your course textbook or visit your college library and do some indepth studying!!!!

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Anonymous Poster
#2
In reply to #1

Re: Pipeline Design

02/03/2010 2:17 AM

I agree so.
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YesMAM
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#4
In reply to #1

Re: Pipeline Design

02/03/2010 9:08 AM

I also agree. Due to the exact nature of the data provided how could this be anything but a configured homework problem. As has been discussed many, many times previously in this Conference Room, I worry that these are the future engineers that will be running this world's industry and from where will they seek their answers to relatively simple fluid mechanics problems at that time? Mr. "S", GA for stating the obvious where our student seems bewildered.

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PWSlack
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#3

Re: Pipeline Design

02/03/2010 3:12 AM

The velocity of fluid is the volumetric flowrate divided by the duct cross-sectional-area. For a liquid, if it's over 3m/s then the pipe is probably undersized. Does that help?

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Tornado
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#5

Re: Pipeline Design

02/04/2010 12:22 AM

The original question seems oddly formulated. Is 1750 m3/h the flow of each pump, or is it the combined flow of both? In either case, where does the 34,500 m3/h number come from? What does the phrase "condenserof discharge discharge" mean? What is the 10 m? Vertical distance, horizontal distance, or remaining pressure that must be delivered to the condenser water nozzles (or other distribution system)? A sketch or more comprehensive verbal description would help.

I would make a preliminary calculation using a rule of thumb such as 3 m/s or 10 ft/s. Then I would select the two pipe sizes above and below this, and use an accepted formula (Hazen-Williams, Darcy-Weisbach, or Colebrook) with the actual I.D.s and equivalent lengths (including fittings) of these selections. If neither choice gave an acceptable pressure drop, I would check the next smaller/larger pipe size. And maybe even some more choices.

Some local code or other requirement may dictate the formula to be used.

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Anonymous Poster
#6

Re: Pipeline Design

02/04/2010 10:47 PM

HI,

GENERALLY THE VELOCITY WILL BE AROUND 2 M/S,

REGARDS
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