*As per your question , you want to run the pump in parallel.
So, you will get double discharge if your piping design is suitable for parallel operation.
Flows Q1 and Q2 combine, and that is what flows through the pipe :
Qpipe = Q1+Q2
*If you want to increase the head pressure , then you have to run the pumps in series.
*You will not give more head pressure if you run in parallel.
*YOU must go through the following links for having clear idea about "pumps in series and pumps in parallel:
http://www.ceet.niu.edu/faculty/kostic/Design-Methods-Ch4-pumps_452/sld011.htm
*Following is a very good link,please visit:
http://www.pumpingmachinery.com/pump_magazine/pump_articles/article_13/article_13.htm
No. But they will give increased flow rate.
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The first answer is correct, except you might not get double the flow or double the pressure.
Depends on the size of the line it is going thru. If you double the flow thru the pipe the head loss could more than double itself, which will cause the pump to perform back on their curves which means the flow rate will decrease.
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Piped in series, yes a higher pressure will result.
(The discharge pressure of the 1st pump, becomes the suction pressure of the 2nd, increasing the overall head pressure..Not necessarily doubled).
(Pumps connected in parallel will increase the overall flow rate, again, not necessarily doubled).
Flow rate also depends on the physical size of the pump(s).
Pumps in Parallel act as a physically larger pump.
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Many years in the Oil & Gas Industry working with pumps of all types and configurations.
Yes. As described by you, the pumps are placed in series, i.e. discharge of 1st pump becomes suction for 2nd pump. In this series configuration, the pump flow remains the same, but the final discharge pressure almost doubles.
For parallel configuration where the incoming flow is divided into two pumps and discharge is again combined into one flow stream, the discharge flow rate is double to that of an individual pump, but the pressure remains almost the same.
The word ‘almost’ is used to take into account the correction due to pipe friction loss in between pumps, pumps loss of efficiency for higher suction inlet, etc.
The series configuration is used for feed water pumps (with multiple impellers on the same shaft) to boost the pressure of water before it enters the boiler. This kind of pressure can not be achieved by single pump only, and even if we find such single pump, it will have very low efficiency due to low flow-very high pressure design.
The parallel flow pumps configuration is used when the demand of fluid flow rate fluctuates, but the discharge pressure required is essentially the same
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Pumps in series give you more head.
Pumps in parallel give you more flow.
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