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Industrial Energy Savings
"Research by NASA in the early 1970s proved conclusively that substantial
savings could be made on the running costs of AC induction motors, but the
potential has never been fully exploited."
"Often three phase KVAR EC are recognized as the most readily available
turnkey solution to various motor problems, since they provide numerous
other benefits in addition to reductions in electrical energy efficient."
Read more on sizing.
Most of the policies and resources that can improve energy efficiency
in buildings and appliances are generally applicable to industrial energy
savings as well. This is especially true in the case of such
electricity-saving technologies as high efficiency lighting components,
motors and industrial drive devices and the many utility rebate programs
available to customers to take advantage of these cost-effective options.
Electric Motors
FACT: "The AC induction motor typically operates at 80% efficiency when
under full load, but the efficiency drops dramatically at lower loads."
Electric motors use more than half of all electricity -- roughly $300
billion per year worldwide. According to Rocky Mountain Institute's (RMI)
439-page E-Source report, The State- of-the-Art: Drivepower, between 28
and 60 percent of U.S. drivepower electricity, and between $25 and $50
billion, could be saved if motors and drive systems became more efficient.
A typical industrial motor consumes electricity costing 10 to 20 times its
initial capital cost each year! Because of this enormous operating cost,
replacing inefficient motors with even slightly more efficient ones can
repay the investment within 6 to 36 months.
RMI estimates the full use of appropriately sized, high-efficiency motors,
adjustable speed drives, power factor optimization, fast speed controllers
for turbo machinery, etc., holds the potential to save between 80,000 and
190,000 MW in the U.S., at an average net cost probably below half a cent
per kwh saved. Capturing such huge savings will take decades, but could be
accelerated with a combination of proper technical and financial support,
particularly from electric utilities.
Numerous opportunities exist for development of industrial processes with
greater efficiency through waste energy reduction, improved energy
productivity and industrial cogeneration. The Pacific Northwest Laboratory
estimates that up to 3 quads of low-temperature waste heat are recoverable
through heat pump technology and as many as 3 quads of high-temperature
waste heat are recoverable by advanced heat exchangers with improved
design and materials. Ongoing R&D is necessary to tap this full potential. |
