Pump head calulation
Pump head calulation
(OP)
pls, apology me to ask the question which is asked many times.
but here I have some confusion..
That, for the pump head calculation of the closed loop system (Chilled Water System), here we need to consider only the friction losses not any other like velocity and static. and finally the summation of the all friction losses become the pump head with some percentage for safety.
But here what I understand is, We are calculating only the losses occur due to friction in the pressure which is developed by the Pump.
as stated above if we consider only the frictional losses, then what about the pressure needed to obtain desired flow rate or Velocity.
Am I correct?
Thanks, in advance.
but here I have some confusion..
That, for the pump head calculation of the closed loop system (Chilled Water System), here we need to consider only the friction losses not any other like velocity and static. and finally the summation of the all friction losses become the pump head with some percentage for safety.
But here what I understand is, We are calculating only the losses occur due to friction in the pressure which is developed by the Pump.
as stated above if we consider only the frictional losses, then what about the pressure needed to obtain desired flow rate or Velocity.
Am I correct?
Thanks, in advance.





RE: Pump head calulation
Not really my area of expertise - so hopefully you get a bit more from the guy's/ gal's on the fine tuning of such a system.
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: Pump head calulation
We will also account for losses (due to friction because of flow) across cooling coils, valves, chillers, and other water side accessories.
Hope the information helps you!
RE: Pump head calulation
RE: Pump head calulation
RE: Pump head calulation
No, the sum of the friction losses is by your loads, not your pump. Your loads will create the sum of friction losses through piping, piping bends, and most importantly coils, control and balancing valves.
The pump does not develop the friction losses, but should be designed to overcome them.
RE: Pump head calulation