Conserving with premium efficiency motors
Conservation through lighting alterations using different bulbs, ballasts and light sources is well understood and easy to achieve. The use of improved efficiency three phase induction motors has not been as accepted. There a number of reasons why conservation efforts with motors have not been as popular. Light bulbs are sold by input ratings or watts. With the input rating being so prominent it`s easy to understand that if a 40 watt bulb is replaced by a 34 watt bulb there will be savings. But, unlike light bulbs, electric motors are sold by output rating (horsepower) rather than wattage. As a result the measure used to evaluate differences in motors is the efficiency rating and efficiency shows up in the fine print and is not as easily understood as the wattage of bulbs. The second reason lighting is different from motors is that Lights are usually on or off --- not in between. But motors can be running at full load, half load, quarter load, or no load. Frequently when motors are coupled through clutches to an intermittent motion system the motor may spend a lot of the time operating with no load. Similarly, air compressors may run unloaded much of the time. As a result of varying load levels and intermittent loading, projected savings based on full load efficiencies may not materialize.
- OSTI ID:
- 54738
- Report Number(s):
- CONF-941218-; TRN: 95:003625-0046
- Resource Relation:
- Conference: 17. world energy engineering congress and the 4th environmental technology congress and expo, Atlanta, GA (United States), 7-9 Dec 1994; Other Information: PBD: 1995; Related Information: Is Part Of Competitive energy management and environmental technologies: Proceedings; PB: 640 p.
- Country of Publication:
- United States
- Language:
- English
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