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Thursday, October 27
PQT 10
Energy & Power Quality
12:30 pm-2:30 pm
This session will cover three of the important issues in energy and power quality.
Modern power supply’s for computers and other high tech equipment save energy, but they also cause harmonics. Harmonics increase losses in cable, deteriorate the overall system efficiency and reduce power factor. This session will discuss designs that maintain power quality by selecting energy saving phase shifting transformers. These new design techniques address the modern day necessity to save energy while maintaining high power quality at the same time.
A discussion on potential cost savings and reduction in environmental impact of using efficient motors and transformers. Attendees will see how high efficiency motors and transformers are made, how they differ from their ‘standard’ counterparts, and how they save energy. Several case histories will be discussed as will explanation of life cycle costing, energy savings, proper sizing and environmental considerations. The Motor Decisions Matter campaign of the Consortium for Energy Efficiency (CEE) will also be discussed.
A paradigm shift in the industry. Traditionally power quality solutions have been sold to the customer to prevent equipment damage from transients, sags and harmonics. The new thinking is to sell power quality as an energy saving measure. This paradigm shift in the power quality industry will be discussed and some of the more significant claims of energy efficiency will be explored in detail.
Paper Presentations
Power Quality Convergence with Energy Saving
Jean-Guy Boudrias, Hammond Power Solutions
All modern Power Supply save energy, they also distort current which cause losses thru Cable & deteriorate efficiency of the system. They also have degrade the Total Power Factor (.6, .7pF)
As a result, they will distort voltage for other loads. Also all Modern Power Supply is fairly sensitive to: Voltage Distortion (Sine Wave Flattening), Voltage Spikes, Common Mode Voltages, Ground Potential Differences, Common Mode Spikes (neutral). With proper design, and good choices of energy saving, phase shifting transformers, we can address the modern necessity of energy saving while promoting high power quality.
Energy Efficient Motors and Transformers: Opportunity for Savings
David Brender, Copper Development Association, Inc.
The DOE estimates that there are about 12.4 million motors of more than 1 hp in service in U.S. manufacturing facilities. CEE reports that about 2.9 million of these motors fail each year, of which 600,000 are replaced.
According to DOE estimates, potential industrial motor systems energy savings, using mature, proven, cost-effective technologies range from 11-18 percent of current annual usage or 62 to 104 billion kWh per year in the manufacturing sector alone. This savings is valued up to $5 billion. It would also avoid the release of up to 29.5 million metric tons of carbon equivalent emissions to the atmosphere annually.
Industrial electric motor driven systems used in production account for about 679 billion kWh, or about 23% of all electricity sold in the USA. Motors used in industrial space heating, cooling and ventilation systems use an additoinal68 billion kWh. Process motor systems account for 63% of all electricity used in the industry.
It is estimated that the NEMA Premium™ motor program could save over 5,800 GWh (5.8 billion kWh) of electricity and prevent the release of nearly 80 million metric tons of carbon into the atmosphere over the nest 10 years. That would be the equivalent of keeping 16 million cars off the road.
While similar figures are not generally available for transformers, DOE does report that 1.1 million liquid-filled transformers are sold annually, representing over 64 MVA of capacity; and over 1.4 million dry-type units are sold annually. Transformers are found in virtually all types of industrial and commercial settings, and represent another large money-saving opportunity. And, there is a host of products that exceed EnergyStar levels.
Power Quality Solutions and Energy Savings
Daniel J. Carnovale, Eaton Electrical
One of the most significant changes in the Power Quality industry in the past five yeas is the method of selling Power Quality solutions. Originally, Power Quality solutions were promoted as an insurance policy to avoid statistically calculated damage from transients, sags, interruptions or harmonics, for example. Today, many Power Quality solution providers have found it easier to promote the hard savings from energy cost reduction associated with their products rather than the potential losses or soft savings associated with minimizing downtime or reducing damage to electrical equipment. The transformation has created a 180 degree reversal in the primary justification for Power Quality solutions. Today, when a company evaluates the return on investment for a solution, energy savings is the lead and Power Quality typically follows as an additional benefit or savings. This paper will discuss some of the more significant claims and will objectively discuss the opportunity for energy savings potential with each solution type.
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