theone said:Homework Statement
I read here http://www.engineeringtoolbox.com/pump-system-curves-d_635.html
that this is where the system curve and the pump performance curve intersect.
But if the situation involves pumps in series, what will the system curve be a plot of? Is it flow rate and the total pump head?
Homework Equations
The Attempt at a Solution
SteamKing said:The system curve is derived from totaling up all of the friction losses in the piping and fittings for different flow rates. It's going to be the same regardless of how many pumps there are. The pump curve is superimposed on the system curve to determine the operating point for the piping system.
If you know the performance of an individual pump, performance for multiple pumps in parallel or in series can be determined according to this article:
http://www.engineeringtoolbox.com/pumps-parallel-serial-d_636.html
The Best Efficiency Point (BEP) for pumps in series is the point at which the combined pumps operate at the highest efficiency. This is where the pumps are delivering the desired flow rate and head with the least amount of energy consumption.
The Best Efficiency Point for pumps in series can be determined by plotting the pump curve for each pump and finding the intersection point where the total head and flow rate intersect. This point is the BEP for the combined pumps. Alternatively, it can also be calculated using mathematical equations and pump performance data.
Finding the Best Efficiency Point for pumps in series is important because it ensures that the pumps are operating at their optimal efficiency, which results in lower energy consumption and cost savings. It also prolongs the lifespan of the pumps and reduces the risk of mechanical failure.
The Best Efficiency Point for pumps in series can be affected by various factors such as changes in the system's flow rate, changes in the system's head, and changes in the pump's performance over time. It can also be affected by the type and size of the pumps, the type of fluid being pumped, and the operating conditions.
Yes, the Best Efficiency Point for pumps in series can change over time due to various factors such as wear and tear on the pumps, changes in the system's operating conditions, and changes in the fluid being pumped. It is important to regularly monitor and adjust the pumps to maintain the BEP and ensure optimal efficiency.