APPENDIX G – Pumps and Turbines
Surge Analysis and the Wave Plan Method
Supplementary Material: Example Problems and Solutions
Appendix G – Problem 34
G.34 Consider a pump with a rated head of 88m, a rated flow of 7.5 m3/s, a rated speed of 800 rpm, and a highest efficiency of 86%.
a. If the pump is operating at its rated speed delivering 7.5 m3/s flowrate, compute the value of θ representing the x-axis in Figure G.14.
b. What are the corresponding h/(a2+v2) and w/(a2+v2) values? Use the non-dimensional characteristics curves shown in Figures G.14 through G.17 appropriate for this pump.
c. What if the rated flowrate is 0.5 m3/s (all other parameters remain the same) and the pump is operating at its rated speed delivering a flowrate of 0.5 m3/s?
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