Best Practices - Motors
In 1994, electric motor-driven systems used in industrial processes consumed 679 billion kWh— 23 percent of all electricity sold in the United States and 64 percent of electricity within the industrial sector. The U.S. Department of Energy (DOE) has worked for years to encourage plant operators to not only install energy efficient motors but also manage and operate motors appropriately.
The presentation and workshop materials developed as part of the Illinois IOF program are intended to clarify energy efficiency issues regarding motors and then to provide the equations and tools necessary to quantify the energy and cost savings potential for properly selecting and operating energy efficiency motors.
Today, motor manufacturers are required to meet standard efficiency levels for their products. However, plant operators should consider investing in high-efficiency or premium-efficiency motors. The following table outlines the efficiency gains over standard motors.
Often, upgrading motors with high efficiency models does not reap sufficient energy savings to justify the initial investment. The Illinois IOF program does recommend that plant managers purchase high efficiency motors when replacing burned out motors. Motor applications with high annual operating hours are the best candidates for premium efficiency models.
The presentation developed for the Illinois IOF program outlines a methodology for calculating potential savings.
The Illinois IOF program recommends that all companies use the MotorMaster+ software to manage their motor equipment inventories. With a catalog of over 20,000 AC motors, this tool helps facilities select appropriate motor replacements, upgrades and control devices. It can compliment other preventative maintenance programs and provide efficiency analyses, savings evaluations and reporting capabilities.
Visit the U.S. DOE Best Practices website to download this free software: MotorMaster+ 4.0
Most people think of efficiency ratings when considering energy conservation for motors. However, recent studies have revealed that most efficiency improvements can be obtained through system optimization and proper motor management.
Illinois IOF Workshop Materials
US DOE Resources