Firestone, click here...

Energy-Efficient Motors: Are They Worth the Cost?

September 2008 - Power & Communication

The extra cost of an energy-efficient motor is often quickly repaid in energy savings. Each point of improved motor efficiency can save significant amounts of money each year. In typical industrial applications, energy-efficient motors are cost-effective when they operate more than 4,000 hours a year, given a two-year simple payback criterion.

For example, with an energy cost of $0.04 per kilowatt-hour (kWh), a single point of efficiency gain for a continuously operating 50-hp motor with a 75 percent load factor saves 4,079 kWh, or $163 annually. So an energy-efficient motor that offers four points of efficiency gain can cost up to $1,304 more than a standard model and still meet a two-year simple payback criterion. A utility rebate program would further enhance the benefits of an energy-efficient motor.

When possible, managers should obtain actual price quotes from motor distributors to calculate simple paybacks. Motors rarely sell at full list price. Managers typically can get a 20-60 percent discount from vendors, with specific prices depending on the distributor’s pricing policies, the number and type of motors purchased, and fluctuations in the motor market.





Comments

Browse Articles

On FacilitiesNet: motors, energy efficiency

Find us on Google+

ASCO. Click here...


Watch the NFMT 2015 Show Preview
Register for Free Today!




QUICK Sign-up - Membership Includes:

New Content and Magazine Article Updates
Educational Webcast Alerts
Building Products/Technology Notices
Complete Library of Reports, Webcasts, Salary and Exclusive Member Content

All fields are required.


click here for more member info.