03-11: Motor Efficiency - A Guide for Reduced Consumption

This paper will compare motor efficiency levels based on a Department of Energy survey, EPAct and NEMA Premium™ efficiency levels. It will focus on how a user can reduce the operating cost of cooling towers by use of premium efficient motors and adjustable speed drives. Motor purchase price is only 2-4% of the life operating cost of that motor; operating cost should be considered on any new project. A software tool for energy surveys and calculations will be introduced.