In recent years, our industry has repeatedly and thoughtfully attempted to calculate pumping system efficiency because:
- energy use drives most of the lifecycle costs associated with pumping systems
- regulatory agencies across the globe insist on reductions in commercial power consumption, as exemplified by the U.S. Department of Energy’s Pump Energy Index (PEI)
- application and sales engineers, consultants, distributors and customers need quantifiable, proven methods to compare different products and identify true system lifetime costs – the objective driving Part Load Efficiency Value (PLEV).
However, an accurate formula has proven elusive. Prior methodologies simply don’t adapt to the reality that most pumping systems have a load profile defined by multiple operating points requiring different flow and head conditions for a specified duration of time.
That’s why one of Intelliquip’ s founders and FPX’s VP & GM of Fluid Handling Solutions, Trygve Dahl, P.E., crafted a holistic metric called True Weighted Efficiency or TWE. TWE weights the energy (power and time) at each operating point to track multi-point energy consumption in order to easily compare pumps using familiar efficiency values. Most importantly, it precisely captures energy consumption rates throughout the process.
Just as we’ve led innovations in front-end automation, business intelligence and mobile access, Intelliquip, and FPX company is proud to be at the forefront of new selection and evaluation methodologies that advance the fluid handling industry.