How can the shut-off pressure of a pump be estimated?
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How can the shut-off pressure of a pump be estimated? Without the pump’s performance curve, and only with the pump’s parameters available, how can the pressure at closed valve be estimated?
Estimation of the pump’s shut-off pressure: if pump manufacturer’s curves are not available, it is possible to determine a few points and create a curve in a similar manner.
My understanding is this: one can look at the pump’s curve to find the head at a flow rate of 0, and then convert everything into static pressure energy. (Basically, the potential energy is 0, and the kinetic energy is also 0; friction is not considered.) Such an algorithm is conservative; it should be the largest. Of course, I’m talking about centrifugal pumps.
The head at a flow rate of 0 is the highest, right?
Yes, and considering that there is no kinetic energy or potential energy at this point, all energy is converted into static pressure energy. My understanding is more based on textbooks; I’m not sure how it’s determined in practice.