QH diagram of an evaporator pumps
QH diagram of an evaporator pumps
(OP)
Hi Everyone
I want to estimate the operating point of a series o pumps.}
I have a drawing attached in a excel format in the next link
http://files.engineering.com/getfile.aspx?folder=b...
There are two pumps of my interest right now (Pump 1 & Pump 2)
How I should focus the analysis of the system curve for the circuit of the pump 1.
Should I analyze the circuit from the point A to the point 1 or from the point A to the point D.
If I choose the second case (from point A to the point D) how is affected the pump curve in the 1-D section. How can this be represented on a Q H diagram.
I know how the parallel pumps QH diagram are representated, but in this cases there are two pumps that suctions from different sources and then act like a parallel system.
I will appreciate your help.
I want to estimate the operating point of a series o pumps.}
I have a drawing attached in a excel format in the next link
http://files.engineering.com/getfile.aspx?folder=b...
There are two pumps of my interest right now (Pump 1 & Pump 2)
How I should focus the analysis of the system curve for the circuit of the pump 1.
Should I analyze the circuit from the point A to the point 1 or from the point A to the point D.
If I choose the second case (from point A to the point D) how is affected the pump curve in the 1-D section. How can this be represented on a Q H diagram.
I know how the parallel pumps QH diagram are representated, but in this cases there are two pumps that suctions from different sources and then act like a parallel system.
I will appreciate your help.





RE: QH diagram of an evaporator pumps
you must get smarter than the software you're using.
RE: QH diagram of an evaporator pumps
Given you have a control valve at point 1, I think A to pt 1 is your key issue. At point 1 it is then at the same pressure as the discharge from pump 2 but has higher flow than A to 1, but maybe a bigger pipe also. Some flow clearly goes 2 to C which is equal to or less than A to 1?
You simply need to divide up the flow system into sections and join the dots where the junctions are where pressure has to be equal in the branches.
My motto: Learn something new every day
Also: There's usually a good reason why everyone does it that way