Dr. Nelik (aka "Dr. Pump") is president of Pumping Machinery, LLC, an Atlanta-based firm specializing in pump consulting, training, equipment troubleshooting and pump repairs. Dr. Nelik has 30 years experience in pumps and pumping equipment. He has published more than 50 documents. He can be contacted by visiting www.PumpingMachinery.com.
Comparing the result to the Efficiency Evaluator program in Pump Challenge #3, the effect of speed is not presented here because the difference was only about 1 percent, due to the pump size change and the Specific Speed factor effect. The effect of overall pump deterioration, like worn out rings (leakage), is a much greater concern in this challenge. Such effects greatly influence pump health (efficiency), and that is what we evaluated.
Life cycle losses can reach into the millions-even for relatively low power units (under 500 hp). Imagine what this may mean for even larger units, like main station feed pumps.