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DOE/CE - 0384. Energy-Efficient. Electric Motor. Selection. Handbook. Prepared by. Gilbert A. McCoy. Todd Litman. John G. Douglass
Summary:
SUMMARY
Substantial reductions in energy and operational costs can be achieved
through the use of energy-efficient electric motors. A handbook was
compiled to help industry identify opportunities for cost-effective
application of these motors. It covers the economic and operational
factors to be considered when motor purchase decisions are being made.
Its audience includes plant managers, plant engineers, and others
interested in energy management or preventative maintenance programs.
BPA PERSPECTIVE
Conservation is a cornerstone of the Bonneville Power Administration's
(BPA) resource program. A major concern of the BPA is to promote the
use of cost-effective electric conservation technologies. The
industrial sector is the largest of the four electric energy consuming
sectors. Within the sector electric motors are the largest users of
that energy. One study estimated recently that 52.7 average megawatts
of electric power, valued at $13.8 million, could be saved in the
Northwest through the replacement of standard motors with high
efficiency models. Of the 2 million industrial motors sold nationwide
each year, energy efficient motors represent only 15 percent of the
sales. That figure is probably even lower in the Northwest where
electricity is cheap. Assisting industry in considering the
high-efficiency motor option was the goal of this project.
BACKGROUND
The efficiency of an electric motor can only be improved through a
reduction in motor losses. Improvement in the design, materials, and
construction have resulted in efficiency gains of 2 to 6 percent which
translates into a 25 percent reduction in losses. A small gain in
efficiency can produce significant energy savings and lower operating
costs over the life of the motor. Consequently, the higher purchase
price of high-efficiency motors (15 to 30 percent) can, in most cases,
be recovered in 2 years through cost savings in energy and operation.
Bonneville POWER ADMINISTRATION i i i
Industrial Technology
Because energy-efficient motors are a proven technology in terms of
durability and reliability, their use should be considered for new
installations, major modifications, replacement of failed motors or
those that require rewinding, or extreme cases of oversized or
underloaded motors.
OBJECTIVE
To assist the industrial sector in identifying cost-effective
opportunities for application of energy-efficient motors.
APPROACH
The Handbook contains a discussion on the characteristics, economics,
and benefits of standard versus high-efficiency motors in the 1 to 200
horsepower range. A motor performance database is supplied for use in
identifying, evaluating, and purchasing energy-efficient motors and
includes information on full and part load nominal efficiency and power
factor as well as material on specific models and costs. Descriptions
of how operating factors such as speed and design voltage effect
performance are included. Typical operating conditions are also
covered. Steps are outlined for launching a motor improvement program,
which includes a worksheet to determine potential energy savings and
the economic feasibility of an energy-efficient motor project.
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Leave comment :
"Energy-Efficient Electric Motor Selection Handbook"
Posted by industrial electrician norwest
Fri Jan 06, 2012 01:02:29 PM
Indeed a nice post! I have been working in the electrical equipments since long and enjoy the posts on electrician, test tag, data cabling, thermal imaging etc. I have subscribed to your blog and do hope you will be posting informative posts like this over the coming days. Thanks You
Posted by industrial electrician norwest
Thu Dec 22, 2011 05:26:13 PM
Indeed a nice post! I have been working in the electrical equipments since long and enjoy the posts on electrician, test tag, data cabling, thermal imaging etc. I have subscribed to your blog and do hope you will be posting informative posts like this over the coming days. Thanks You
Posted by rakhee
Thu Apr 15, 2010 11:56:47 AM
Good site good article, tx
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