Cost savings found when PDS systems installed, research shows

New analysis shows major energy and cost savings potential from installing Power Drive Systems (PDS) on commercial pumps, fans, compressors and other motor-driven products, regardless of load variability.
The new research, led by the National Electric Manufacturers Association (NEMA) and the Northwest Energy Efficiency Alliance (NEEA), shows a 43% drop in energy use when PDSs are applied to variable load pumping systems.
It also shows a 23% drop when used with constant load systems – an opportunity for owners and operators of commercial facilities to dramatically cut their energy spending.
This analysis is unique in that it assesses the energy savings from installing PDSs on constant load applications.
A PDS is the combination of an electric motor, adjustable speed controls and sensors that provide feedback to the equipment, allowing the equipment to decrease or increase speed based on changes in system demand.
The use of PDSs has become commonplace over the years, but is most often applied to variable load systems.
There is a lack of data on the effect PDSs have on constant load systems, which has limited installation and prevented end users from reaping the full benefit of better system control. This research aims to change that.
With motor driven products like pumps, fans and compressors using up about 25% of all commercial energy there is a huge potential for commercial energy savings, and the greater the use of PDSs the more energy and money that can be saved.
These findings are even more important as the country prepares for the post-COVID world – a world which will likely include fewer building occupants and lower energy demand in what were once fully occupied commercial buildings.
Visit www.neea.org to read the full report.

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