Pumps and Power: Advanced Applications I – Multi-Pump Systems & Life-Cycle Energy Costs
A top-level operator rarely evaluates a pump in isolation — real treatment plants and lift stations run multiple pumps together, and real capital decisions weigh purchase price against decades of electricity bills. This guide extends everything built in the earlier guides in this series (Water Horsepower, Brake Horsepower, motor and overall efficiency, and energy cost math) to two advanced, exam-relevant, and operationally real scenarios: calculating the combined power draw of pumps running together in series or parallel, and running a full life-cycle cost comparison between two competing pump options. These are the calculations behind real capital-planning decisions, not just theoretical exercises.
Recap: Series and Parallel Pump Configurations
As covered conceptually in the Pumps & I