Large Cooling Water Pump Upgrade for Increased Capacity And Reduced Impeller Cavitation
This case study discusses the hydraulic upgrade of two sets of four (25 percent) large vertical cooling water pumps. To increase the electrical output of subject power station, the cooling water pumps of block 1 and 2 had to be upgraded in capacity minimally thirteen percent, thereby also attempting to minimize the occurrence of impeller cavitation. The upgrade consisted of replacing the existing impeller and diffuser plus casing, and installing new electric motors. To corroborate anticipated hydraulic performance the replacement impeller and diffuser were model tested on a 1:4 scale. The model test further served to determine final sizing dimension of the upgrade.
Visser, Frank (2018). Large Cooling Water Pump Upgrade for Increased Capacity And Reduced Impeller Cavitation. Turbomachinery Laboratory, Texas A&M Engineering Experiment Station. Available electronically from