TRUE WEIGHTED EFFICIENCY

Another first from Intelliquip

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 President, 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 is proud to be at the forefront of new selection and evaluation methodologies that advance the fluid handling industry.

TWE
IN THE FIELD

ABOUT THE CREATOR

Trygve Dahl, PH.D., P.E.
Intelliquip President

For more than 30 years, Trygve Dahl has harnessed technology to create new innovations for the fluid handling equipment industry. He began his career as a design engineer with Ingersoll-Rand Company in 1983 where he participated in and led numerous product development programs and won a patent for an innovative pump design. He applied CAD/CAM/CAE technologies to hydraulic and mechanical design and to structural and fluid dynamic analysis of pumping equipment.

In the early 1990s, Dahl continued to explore the use of computer-aided tools to aid in solving conceptual and detailed design problems. This work led to the development of PROS+TM, one of the world’s most powerful and advanced software solutions for pump selection and configuration at the time. He also did research in design theory, focused on the implementation of design systems for engineered-to-order ranges of complex mechanical products. He was able to exploit this work as the Director of Technology for Ingersoll-Dresser Pump before leaving to co-found Intelliquip.

Today, Dr. Dahl continues to emphasize the use of design theory, practical engineering principals, and 30+ years in the industry to direct the business development and technology for Intelliquip’s Intelligent Front End solutions. These include real-world selection, configuration, and quote management solutions, plus emerging technologies based on mobile devices, data analytics, and data exchange.

Dahl has won many industry awards, including the Hydraulic Institute’s 2010 Member of the Year Award, and authored over a dozen technical papers, as well as a chapter on “Selecting and Purchasing Pumps” published in the Pump Handbook. He holds a B.S. in Mechanical Engineering (Summa Cum Laude), an M.S. in Manufacturing Systems Engineering, and a Ph.D. in Mechanical Engineering, all from Lehigh University. He’s also earned a Professional Engineer license, is a member of the American Society for Mechanical Engineers, and a Six Sigma “Green Belt.” Dahl also chairs the Electronic Data Exchange Committee for the Hydraulic Institute, and is actively involved in the American Petroleum Institute and Fiatech.