Two Pumps at common point
Two Pumps at common point
(OP)
Hello
I have two pipes in parallel that combines at the same point in the system. A pump is connected at the start each pipe line. The two pumps are pumping different fluids with known densities. The flow rate on each pipe segment is known too. The pressure is known at all three points of interest on the pipes.
-- How can I find the fluids ratio at the common point or the mixed density?
-- Can any pump stop the other from pumping?
I am new to mechanics selflearning, all help and guidance is appreciated.
regards
I have two pipes in parallel that combines at the same point in the system. A pump is connected at the start each pipe line. The two pumps are pumping different fluids with known densities. The flow rate on each pipe segment is known too. The pressure is known at all three points of interest on the pipes.
-- How can I find the fluids ratio at the common point or the mixed density?
-- Can any pump stop the other from pumping?
I am new to mechanics selflearning, all help and guidance is appreciated.
regards





RE: Two Pumps at common point
Pump B may slow down, stop, or backflow, if the head produced by pump A - absolute value of head loss in pipe AC + absolute value of head loss in pipe BC > head produced by pump B, or v/v. Check valves downstream of each pump discharge would prevent backflow in one pump caused by the other.
"People will work for you with blood and sweat and tears if they work for what they believe in......" - Simon Sinek
RE: Two Pumps at common point
You require a system resistance curve for each pump drawn across the individual pump performance curve to even get somewhere near to understanding what is likely to happen.
It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)
RE: Two Pumps at common point
Typically for parallel flow setup in centrifugal pumps, the pump curves must be very steep and should be same discharge pressure.
RE: Two Pumps at common point