Graphical Method

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Anonymous Poster #1	Graphical Method 06/26/2012 9:41 AM
	Kindly suggest/provide me some study materials on arriving Pipeline steady flow system characteristics curves (Flow Vs Pressure drop) of complex pipe networks (graphical method) to superimpose on the available centrifugal pump performance curve to get the operating point.
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PWSlack Guru Join Date: Jan 2007 Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on. Posts: 32175 Good Answers: 839	#1 Re: Graphical Method 06/26/2012 10:25 AM
	The operating point can be determined by using a pressure gauge on the inlet and the outlet of the pump, and the pump manufacturer's performance chart for the pump. Network analysis is rarely necessary, though there are iterative, and tedious, calculation techniques available should the need arise; these calculations can be sped-up by using network analysis software packages. __________________ "Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
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bigg Guru Join Date: Jun 2010 Posts: 1296 Good Answers: 104	#2 Re: Graphical Method 06/26/2012 3:42 PM
	Here's a link to a fairly recent similar request: http://cr4.globalspec.com/thread/75444#comment820303 When I had to do the calculations, I referred to Schaum's Outline Series, Theory and Problems of Fluid Mechanics and Hydraulics, 2nd Ed. (1962), by Ranald V. Giles. Googling 'pipe network analysis' reveals several more recent on-line articles you could study.
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CaptMoosie Guru Join Date: May 2009 Location: Red Hook, New York (Mid-Hudson River Valley) Posts: 4362 Good Answers: 179	#3 Re: Graphical Method 06/27/2012 8:20 AM
	I'm assuming that this is a water distribution analysis, correct? There are many very good hydraulic engineering textbooks available online or your university library that depict the methodology you are seeking. You DO know how to perform a Hardy-Cross analysis by hand calculation, don't you? IMO, the numerical method is far better then the graphical method for arriving at satisfactory results when adding a centrifugal pump to the mix. You can also perform a system analysis with a basic KYPIPES software package, or if you need more advance features go with the WATERCAD software suite. Neither package is free. You can also do basic hydraulic analysis of a water distribution system with the freely available EPANET that can be downloaded from the US Environmental Protection Agency (USEPA). __________________ "Veni, Vidi, Vici"; hendiatris attributed to Gaius Julius Caesar, 47 B.C.
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