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Lama Sinto
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Join Date: Jun 2010
Posts: 7

Pipeline Ramification

07/08/2010 7:32 AM

i have a ramifying pipeline network. i discovered that when i cut some branches if pipes from the network, the global flow rate at the outlet of the final pipe decreases instead of increasing. i don't understand why.

i don't know if it is due to the parallel connection of the pipes since the fan rotation speed and power supply remains constant.
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RDGRNR
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Engineering Fields - Instrumentation Engineering - New Member

Join Date: Dec 2009
Location: San Antonio, TX USA
Posts: 844
Good Answers: 29
#1

Re: Pipeline Ramification

07/08/2010 8:46 AM

Without knowing what your medium is, I wonder if it isn't a total decrease in volume downstream and if compressibility or mass aren't issues. Can you be more specific?

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 "Do not worry about your difficulties in Mathematics. I can assure you mine are still greater". - Albert Einstein
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Lama Sinto
Member

Join Date: Jun 2010
Posts: 7
#2
In reply to #1

Re: Pipeline Ramification

07/08/2010 9:47 AM

the system is used to collect electrolysis pot gases. when some pots are stopped, their collection mouths are closed. the suction force of the fan is redistributed to the rest of the pots.

since the sucktion mouths are opened to the environment and the sucgtion force remains constant, normally air will be sucked in compensation for the gases of the stoped pots. more to that dilution of these gases with air reduces the density.

the flow rate of gases should have at least remained the same but it is not the case. ot instaed reduces.

my question is to know if parallel connection of pipes do not increase resistance when pipes are reduced. and how will this affect the flow rate
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Tornado
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Technical Fields - Technical Writing - New Member Engineering Fields - Piping Design Engineering - New Member

Join Date: May 2009
Location: Richland, WA, USA
Posts: 21017
Good Answers: 795
#3

Re: Pipeline Ramification

07/10/2010 2:11 AM

If some paths in a parallel network are blocked, the total flow resistance increases and the total flow decreases. For instance, what if all the pot mouths are closed? Flow will be zero.

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