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Note: This page contains sample records for the topic "motor systems efficiency" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


1

Electric motor systems in developing countries: Opportunities for efficiency improvement  

SciTech Connect (OSTI)

This report presents an overview of the current status and efficiency improvement potential of industrial motor systems in developing countries. Better management of electric motor systems is of particular relevance in developing countries, where improved efficiency can lead to increased productivity and slower growth in electricity demand. Motor systems currently consume some 65--80% of the industrial electricity in developing countries. Drawing on studies from Thailand, India, Brazil, China, Pakistan, and Costa Rica, we describe potential efficiency gains in various parts of the motor system, from the electricity delivery system through the motor to the point where useful work is performed. We report evidence of a significant electricity conservation potential. Most of the efficiency improvement methods we examine are very cost-effective from a societal viewpoint, but are generally not implemented due to various barriers that deter their adoption. Drawing on experiences in North America, we discuss a range of policies to overcome these barriers, including education, training, minimum efficiency standards, motor efficiency testing protocols, technical assistance programs, and financial incentives.

Meyers, S.; Monahan, P.; Lewis, P.; Greenberg, S. [Lawrence Berkeley Lab., CA (United States); Nadel, S. [American Council for an Energy-Efficient Economy, Washington, DC (United States)

1993-08-01T23:59:59.000Z

2

System and method to determine electric motor efficiency nonintrusively  

DOE Patents [OSTI]

A system and method for nonintrusively determining electric motor efficiency includes a processor programed to, while the motor is in operation, determine a plurality of stator input currents, electrical input data, a rotor speed, a value of stator resistance, and an efficiency of the motor based on the determined rotor speed, the value of stator resistance, the plurality of stator input currents, and the electrical input data. The determination of the rotor speed is based on one of the input power and the plurality of stator input currents. The determination of the value of the stator resistance is based on at least one of a horsepower rating and a combination of the plurality of stator input currents and the electrical input data. The electrical input data includes at least one of an input power and a plurality of stator input voltages.

Lu, Bin (Kenosha, WI); Habetler, Thomas G. (Snellville, GA); Harley, Ronald G. (Lawrenceville, GA)

2011-08-30T23:59:59.000Z

3

System and method to determine electric motor efficiency using an equivalent circuit  

DOE Patents [OSTI]

A system and method for determining electric motor efficiency includes a monitoring system having a processor programmed to determine efficiency of an electric motor under load while the electric motor is online. The determination of motor efficiency is independent of a rotor speed measurement. Further, the efficiency is based on a determination of stator winding resistance, an input voltage, and an input current. The determination of the stator winding resistance occurs while the electric motor under load is online.

Lu, Bin (Kenosha, WI); Habetler, Thomas G. (Snellville, GA)

2011-06-07T23:59:59.000Z

4

Premium Efficient Motors  

E-Print Network [OSTI]

Premium efficient motors are available which convert electrical energy into mechanical energy with fewer losses than the more standard motors. The fewer losses in these motors are due to changes in the motor design and improved manufacturing methods...

Moser, P. R.

1984-01-01T23:59:59.000Z

5

Efficient Motor System Tools Sponsored by the DOE Motor Challenge Program  

E-Print Network [OSTI]

efficiency, purchase price, energy costs, hours of operation, load factor, and utility rebates are taken into account. -Utility rebate program data, which includes minimum qualifying efficiency and rebate dollar values. -Menus and extensive Help screens... in accordance with these two assumptions, the private sector will supply the delivery mechanisms for Motor Challenge tools because they will represent a value added to their existing commercial products. Industry and DOE Drivers Industry and DOE, in general...

Blazewicz, S.; McCoy, G. A.; Olszewski, M.; Scheihing, P.

6

Energy Efficient Motors  

E-Print Network [OSTI]

Efficiency is only one aspect of motor performance. This paper discusses how efficiency is influenced by such factors as horsepower rating, poles, actual load, and starting requirements. It discusses some of the variables affecting efficiency...

Hoffmeyer, W.

1982-01-01T23:59:59.000Z

7

Utility and State Industrial Efficient Motors Systems Incentives Programs: Experience and Success Factors  

E-Print Network [OSTI]

. The Washington Slate Energy Office provides technology transfer and efficiency information. WSEO also developed and maintains the MotorMaster energy-efficient motor database, which is distributed nationally. The Wisconsin Energy Bureau will provide...

Roop, J. M.; Stucky, D. J.

8

Cost Effective, High Efficiency Integrated Systems Approach To Auxiliary Electric Motors  

SciTech Connect (OSTI)

The CARAT program, carried out by Kinetic Art & Technology Corporation (KAT), has been one of the most commercially successful KAT R&D programs to date. Based on previous development of its technology, KAT designed, constructed and tested a highly efficient motor and controller system under this CARAT program with supplemental commercial funding. Throughout this CARAT effort, the technical objectives have been refined and refocused. Some objectives have been greatly expanded, while others have been minimized. The determining factor in all decisions to refocus the objectives was the commercial need, primarily the needs of KAT manufacturing partners. Several companies are employing the resulting CARAT motor and controller designs in prototypes for commercial products. Two of these companies have committed to providing cost share in order to facilitate the development. One of these companies is a major manufacturing company developing a revolutionary new family of products requiring the ultra-high system efficiency achievable by the KAT motor and controller technologies (known as Segmented ElectroMagnetic Array, or SEMA technology). Another company requires the high efficiency, quiet operation, and control characteristics afforded by the same basic motor and controller for an advanced air filtration product. The combined annual production requirement projected by these two companies exceeds one million units by 2005.

Roy Kessinger; Kanchan Angal; Steve Brewer; Steve Kraihanzel; Lenny Schrank; Jason Wolf

2003-07-15T23:59:59.000Z

9

Cost Effective, High Efficiency Integrated Systems Approach to Auxilliary Electric Motors  

SciTech Connect (OSTI)

The CARAT program, carried out by Kinetic Art & Technology Corporation (KAT), has been one of the most commercially successful KAT R&D programs to date. Based on previous development of its technology, KAT designed, constructed and tested a highly efficient motor and controller system under this CARAT program with supplemental commercial funding. Throughout this CARAT effort, the technical objectives have been refined and refocused. Some objectives have been greatly expanded, while others have been minimized. The determining factor in all decisions to refocus the objectives was the commercial need, primarily the needs of KAT manufacturing partners. Several companies are employing the resulting CARAT motor and controller designs in prototypes for commercial products. Two of these companies have committed to providing cost share in order to facilitate the development. One of these companies is a major manufacturing company developing a revolutionary new family of products requiring the ultra-high system efficiency achievable by the KAT motor and controller technologies (known as Segmented ElectroMagnetic Array, or SEMA technology). Another company requires the high efficiency, quiet operation, and control characteristics afforded by the same basic motor and controller for an advanced air filtration product. The combined annual production requirement projected by these two companies exceeds one million units by 2005.

Roy Kessinger Jr.; Keith Seymour; Kanchan Angal; Jason Wolf; Steve Brewer; Leonard Schrank

2003-09-26T23:59:59.000Z

10

Justification for Energy Efficient Motors  

E-Print Network [OSTI]

This paper presents the results of a study of Energy Efficient (or EE) motors in NEMA frame sizes, (1-200 HP). It examines the economics of using EE motors for new motor requirements, as replacements for motors - instead of rewinding...

Buschart, R. J.

1981-01-01T23:59:59.000Z

11

Improving Energy Efficiency in Pharmaceutical ManufacturingOperations -- Part I: Motors, Drives and Compressed Air Systems  

SciTech Connect (OSTI)

In Part I of this two-part series, we focus on efficient use of motors, drives and pumps, both for process equipment and compressed air systems. Pharmaceutical manufacturing plants in the U.S. spend nearly $1 billion each year for the fuel and electricity they need to keep their facilities running (Figure 1, below). That total that can increase dramatically when fuel supplies tighten and oil prices rise, as they did last year. Improving energy efficiency should be a strategic goal for any plant manager or manufacturing professional working in the drug industry today. Not only can energy efficiency reduce overall manufacturing costs, it usually reduces environmental emissions, establishing a strong foundation for a corporate greenhouse-gas-management program. For most pharmaceutical manufacturing plants, Heating, Ventilation and Air Conditioning (HVAC) is typically the largest consumer of energy, as shown in Table 1 below. This two-part series will examine energy use within pharmaceutical facilities, summarize best practices and examine potential savings and return on investment. In this first article, we will focus on efficient use of motors, drives and pumps, both for process equipment and compressed air systems. Part 2, to be published in May, will focus on overall HVAC systems, building management and boilers.

Galitsky, Christina; Chang, Sheng-chien; Worrell, Ernst; Masanet,Eric

2006-04-01T23:59:59.000Z

12

Efficient electric motor systems for industry. Report on roundtable discussions of market problems and ways to overcome them  

SciTech Connect (OSTI)

Improving the efficiency of electric motor systems is one of the best energy-saving opportunities for the United States. The Department of Energy (DOE) Office of Industrial Technologies estimates that by the year 2010 in the industrial sector, the opportunities for savings from improved efficiency in electric motor systems could be roughly as follows: 240 billion kilowatthours per year. $13 billion per year from US industry`s energy bill. Up to 50,000 megawatts in new powerplant capacity avoided. Up to 44 million metric tons of carbon-equivalent emissions mitigated per year, corresponding to 3 percent of present US emissions. Recognizing the benefits of this significant opportunity for energy savings, DOE has targeted improvements in the efficiency of electric motor systems as a key initiative in the effort to promote flexibility and efficiency in the way electricity is produced and used. Efficient electric motor systems will help the United States reach its national goals for energy savings and greenhouse gas emission reductions.

Not Available

1993-11-01T23:59:59.000Z

13

Ecological and Economical efficient Heating and Cooling by innovative Gas Motor Heat Pump Systems and Solutions  

E-Print Network [OSTI]

#12;Ecological and Economical efficient Heating and Cooling by innovative Gas Motor Heat Pump use of buildings Gas Heat Pump Solution #12;Gas Heat Pump - deserves special attention due to its source in addition to the outside air 路A further essential component of Gas Heat Pump air conditioning

Oak Ridge National Laboratory

14

Efficient, Inexpensive Motors: A New Trend in The Motors Market  

E-Print Network [OSTI]

EFFICIENT, INEXPENSIVE MOTORS: A NEW TREND IN THE MOTORS MARKET Ronald G. Wroblewski, P.E. Trainer and Consultant ABSTRACT The Consortiwn for Energy Efficiency (CEE) has established criteria for premium-efficiency motors above the EPACf... standard. CEE has set a wrifonn efficiency benchmark that all market players (manufacturers, utilities, and end-users) can use. Some end-users however, have been reluctant to specify these motors because they think they are too expensive...

Wroblewksi, R. G.

15

Writing Motor Specifications - How to Include Efficiency  

E-Print Network [OSTI]

The escalating cost of electric power coupled with the rapid depletion of our non-renewable resources makes consideration of motor efficiency good sense both from economic and conservation viewpoints. The efficiency of an electric motor can...

Quartermaine, B. J.

1980-01-01T23:59:59.000Z

16

Application Guidelines for Energy Efficient Motors  

E-Print Network [OSTI]

Rapidly rising power costs have prompted industrial motor users to consider specifying motors having efficiencies higher than the norm. Blanket specifications calling out high efficiency units for all applications can result in extended deliveries...

Cowern, E. H.

1983-01-01T23:59:59.000Z

17

Development of Ulta-Efficient Electric Motors  

SciTech Connect (OSTI)

Electric motors utilize a large amount of electrical energy in utility and industrial applications. Electric motors constructed with high temperature superconducting (HTS) materials have the potential to dramatically reduce electric motor size and losses. HTS motors are best suited for large motor applications at ratings above 1000 horsepower (hp), where the energy savings from the efficiency improvement can overcome the additional power required to keep the superconductors on the rotor cooled. Large HTS based motors are expected to be half the volume and have half the losses of conventional induction motors of the same rating. For a 5000 hp industrial motor, this energy savings can result in $50,000 in operating cost savings over the course of a single year of operation. Since large horsepower motors utilize (or convert) about 30% of the electrical power generated in the United States and about 70% of large motors are candidates for replacement by HTS motors, the annual energy savings potential through the utilization of HTS motors can be up to $1 Billion in the United States alone. Research in the application of HTS materials to electric motors has lead to a number of HTS motor prototypes yet no industrial HTS motor product has yet been introduced. These motor demonstrations have been synchronous motors with HTS field windings, on the rotor. Figure 1-1 shows a solid model rendering of this type of motor. The rotor winding is made with HTS coils that are held at cryogenic temperature by introducing cooling fluid from the cryocooler to the rotor through a transfer coupling. The stator winding is made of copper wire. The HTS winding is thermally isolated from the warm armature and motor shafts by a vacuum insulation space and through the use of composite torque tubes. The stator in Figure 1-1 is an air core stator in that the stator teeth and a small part of the yoke is made up of nonmagnetic material so the magnetic fields distribute themselves as if in air. Between the HTS field winding and the physical air gap is a series of concentric cylinders that act as vacuum insulation space walls as well as conducting paths for induced currents to flow in order to shield the HTS winding and the rotor cold space from time dependent fields. These time dependent fields may be caused by rotor hunting, during a change in motor load, or by non-fundamental component voltages and currents applied by the inverter. These motors are variable speed controlled by the inverter. Common large motor utility and industrial applications are pump and fan drives that are best suited by a variable speed motor. Inverter control of the HTS motor eliminates the need to design the rotor for line starting, which would dump a large amount of heat into the rotor that would then heavily tax the cryogenic cooling system. The field winding is fed by a brushless exciter that provides DC current to the HTS rotor winding. The stator winding is air or water cooled. Technical and commercial hurdles to industrial HTS motor product introduction and customer acceptance include (1) the high cost of HTS wire and the cryogenic cooling system components, (2) customer concerns about reliability of HTS motors, and (3) the ability to attain the loss reduction potential of large HTS motors. Reliance Electric has demonstrated a number of HTS based electric motors up to a 1000 hp, variable speed synchronous motor with an HTS field winding in the year 2000. In 2001 this motor was tested to 1600 hp with a sinusoidal (constant frequency) supply. Figure 1-2 shows the HTS motor on the dynamometer test stand in the Reliance Electric test lab. The extensive test program of the 1000 hp motor successfully demonstrated the technical feasibility of large HTS motors and the basic technologies involved, however the test results did indicate the need for design refinements. In addition, test results served to identify other more fundamental critical technology issues, and revealed the need to continue research efforts in order to improve future HTS motor first cost, reliability, and performa

Shoykhet, B. (Baldor Comp.); Schiferl, R. (Baldor Comp.); Duckworth, R.; Rey, C.M.; Schwenterly, S.W.; Gouge, M.J.

2008-05-01T23:59:59.000Z

18

Ontario Hydro Motor Efficiency Study  

E-Print Network [OSTI]

Electric motors consume more than one-half of the electrical energy produced by Ontario Hydro. In the residential sector, the major motor load is for refrigerators and freezers while packaged equipment dominate the motor load in the commercial...

Dautovich, D. R.

1980-01-01T23:59:59.000Z

19

Rotary Electrodynamics of a DC Motor: Motor as Mechanical Capacitor Lab 2: Modeling and System Identification  

E-Print Network [OSTI]

). 路 im is the current through the motor. Because the motor is in series with all other electrical). Because power is conserved, m = Kmim (motor efficiency is actually closer to 69%). Here, Km 0.00767 VRotary Electrodynamics of a DC Motor: Motor as Mechanical Capacitor Lab 2: Modeling and System

20

Evaluating High Efficiency Motor Retrofit  

E-Print Network [OSTI]

In the petrochemical and refining Industries, and most manufacturing plants, the reliable operation of AC motors always has been crucial to the continuous operation of the process. Now, the cost of operating these motors has also become a...

Evans, T. A.

1984-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "motor systems efficiency" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

Energy-Efficient Electric Motor Selection Handbook  

SciTech Connect (OSTI)

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.

McCoy, Gilbert A.; Litman, Todd; Douglass, John G.

1990-10-01T23:59:59.000Z

22

Method for assessing in-service motor efficiency and in-service motor/load efficiency  

DOE Patents [OSTI]

A method and apparatus for assessing the efficiency of an in-service motor. The operating characteristics of the in-service motor are remotely measured. The operating characteristics are then applied to an equivalent circuit for electrical motors. Finally the equivalent circuit is evaluated to determine the performance characteristics of said in-service motor. Based upon the evaluation an individual is able to determine the rotor speed, power output, efficiency, and toque of the in-service motor. Additionally, an individual is able to confirm the calculations by comparing measured values with values obtained as a result of the motor equivalent circuit evaluation.

Kueck, John D. (Oak Ridge, TN); Otaduy, Pedro J. (Oak Ridge, TN)

1997-01-01T23:59:59.000Z

23

Total Economics of Energy Efficient Motors  

E-Print Network [OSTI]

Due to the large increases in cost of electrical energy in recent years, the energy savings attainable with the use of energy-efficient motors is very attractive to all motor users. But energy and electric demand charge savings tell only part...

Nester, A. T.

1984-01-01T23:59:59.000Z

24

High Efficiency Fans and High Efficiency Electrical Motors  

E-Print Network [OSTI]

Replacing nominal efficient electrical motors with premium efficiency can save on electrical power costs in cotton gins. Connected horsepower load on industrial air fans is approximately 60% of the total horsepower in a typical cotton gin...

Breedlove, C. W.

25

Understanding premium-efficiency motor economics  

SciTech Connect (OSTI)

This paper reports that from a numerical standpoint, motors in continuous-duty service comprise only a fraction of those used in America's industrial plants. Not all plant engineers, however, are aware that the relatively few motors in continuous-duty service account for about 75% of all industrial electrical use. For motors in continuous-duty service, a few percentage points gain in efficiency can yield tremendous reductions in the plant electric bill energy charge. Acknowledgment of this fact has spawned the common practice of replacing less-efficient motors with types of more energy-efficient design. However, arbitrary application of this retrofit practice can be a costly mistake. To maximize return on investment, some basic factors must be understood and considered.

Hirzel, J. (GE Motors, Fort Wayne, IN (US))

1992-04-30T23:59:59.000Z

26

The China Motor Systems Energy Conservation Program: A major national initiative to reduce motor system energy use in China  

SciTech Connect (OSTI)

Electric motor systems are widely used in China to power fans, pumps, blowers, air compressors, refrigeration compressors, conveyers, machinery, and many other types of equipment. Overall, electric motor systems consume more than 600 billion kWh annually, accounting for more than 50 percent of China's electricity use. There are large opportunities to improve the efficiency of motor systems. Electric motors in China are approximately 2-4 percent less efficient on average than motors in the U.S. and Canada. Fans and pumps in China are approximately 3-5 percent less efficient than in developed countries. Even more importantly, motors, fans, pumps, air compressors and other motor-driven equipment are frequently applied with little attention to system efficiency. More optimized design, including appropriate sizing and use of speed control strategies, can reduce energy use by 20 percent or more in many applications. Unfortunately, few Chinese enterprises use or even know about these energy-saving practices. Opportunities for motor system improvements are probably greater in China than in the U.S. In order to begin capturing these savings, China is establishing a China Motor Systems Energy Conservation Program. Elements of this program include work to develop minimum efficiency standards for motors, a voluntary ''green motor'' labeling program for high-efficiency motors, efforts to develop and promote motor system management guidelines, and a training, technical assistance and financing program to promote optimization of key motor systems.

Nadel, Steven; Wang, Wanxing; Liu, Peter; McKane, Aimee T.

2001-05-31T23:59:59.000Z

27

Efficiency test on the Buchanan pump motor  

E-Print Network [OSTI]

representing the Lower Colorado River Authority, Fargo Engineering Company~ and the Westinghouse Electric Corporation began conducting the necessary tests to determine the efficiency of the machine, The first test conducted obtained data for a no... excitation the motor breaker was tripped and the motor allowed to decelerate, The Buchanan powerhouse synchroscope was used to determine the time at which the mctor was turning at rated speed. On a signal from the operator at that instant simultaneous...

Krezdorn, Roy Rankin

1954-01-01T23:59:59.000Z

28

Premium Efficiency Motor Selection and Application Guide - A...  

Broader source: Energy.gov (indexed) [DOE]

handbook informs new motor purchase decisions by identifying energy and cost savings that can come from replacing motors with premium efficiency units. The handbook provides an...

29

System and method for motor parameter estimation  

DOE Patents [OSTI]

A system and method for determining unknown values of certain motor parameters includes a motor input device connectable to an electric motor having associated therewith values for known motor parameters and an unknown value of at least one motor parameter. The motor input device includes a processing unit that receives a first input from the electric motor comprising values for the known motor parameters for the electric motor and receive a second input comprising motor data on a plurality of reference motors, including values for motor parameters corresponding to the known motor parameters of the electric motor and values for motor parameters corresponding to the at least one unknown motor parameter value of the electric motor. The processor determines the unknown value of the at least one motor parameter from the first input and the second input and determines a motor management strategy for the electric motor based thereon.

Luhrs, Bin; Yan, Ting

2014-03-18T23:59:59.000Z

30

Case Studies of High Efficiency Electric Motor Applicability  

E-Print Network [OSTI]

Much has been written about the advantages and disadvantages of high efficiency electric motors. For a given motor application it is possible to find literature that enables a plant engineer to make an informed choice between a standard efficiency...

Wagner, J. R.

31

New Energy Efficiency Standards for Electric Motors and Walk...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Motors and Walk-in Coolers and Freezers to Save on Energy Bills and Reduce Carbon Pollution New Energy Efficiency Standards for Electric Motors and Walk-in Coolers and Freezers...

32

Estimating Motor Efficiency in the Field  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-UpHeat PumpRecord ofESPCof EnergyHouse EnvironmentalEstimating Motor Efficiency in

33

Abstract Efficiency issues of variable-capacitance micromotors are discussed in context of combined drive and motor  

E-Print Network [OSTI]

motors, electric drives, efficiency I. INTRODUCTION An active area of research for commercial of combined drive and motor interaction. It is shown that variable-capacitance motors ideally have nearly, the drive system consisting of both the motor and electronics is not ideal when considering different

Chapman, Patrick

34

Case Histories of Energy Efficient Motors  

E-Print Network [OSTI]

should be the value read from a reputable manufactur er I s data sheet. COOLING TOWER MOTORS The plant is now replacing 25 hp cooling tower motors with EE motors as the old ones burn out. An adapter base for changing from the old frame size 365... volts and amps from an EE motor and comparing this to readings from an old motor in service on the tower. This was based on an assumption of identical loads and motor power factors. This calculation showed yearly savings very close to the cost...

Riley, J. C.; Comiskey, W. T

35

Optimization of induction motor efficiency. Volume 3. Experimental comparison of three-phase standard motors with Wanlass motors. Final report  

SciTech Connect (OSTI)

Researchers conducted comprehensive laboratory tests to evaluate the effectiveness of the Wanlass connection in improving motor efficiency. On the basis of these tests, they found no reason to conclude that such a connection is more efficient than the standard connection.

Fuchs, E.F.

1985-12-01T23:59:59.000Z

36

Kieffer Paper Mill's Recycled Fiber Mill and PSI Energy's High Efficiency Motors Plan  

E-Print Network [OSTI]

efficiency would yield significant energy savings. PSI Energy was able to help Kieffer examine the economics of high efficiency motors, and through the PSI Energy High Efficiency Motors Plan encouraged Kieffer Paper Mills to purchase energy efficient motors...

Myers, J. A.

37

2528 IEEE TRANSACTIONS ON MAGNETICS, VOL. 43, NO. 6, JUNE 2007 A Highly Efficient 200 000 RPM Permanent Magnet Motor System  

E-Print Network [OSTI]

presents the development of an ultra-high-speed permanent magnet synchronous motor (PMSM) that produces large iron loss at high-speed. In ultra-high-speed applications, PMSM offers the advantage of high efficiency, and high stability, is generally considered for high performance PMSM control. However, for ultra

Wu, Thomas

38

United States Industrial Electric Motor Systems Market Opportunities...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

for Industry MotorMaster+ User Manual New Motor Systems Market Assessment AMO and LBNL are currently developing an update to the original Motor Systems Market Assessment. The...

39

Ameren Illinois (Electric)- Custom, HVAC, and Motor Business Efficiency Incentives  

Broader source: Energy.gov [DOE]

Prescriptive rebates are available for many HVAC and motor efficiency improvements. Pre-approval is required for all rebates. The programs are available only to non-residential customers that...

40

Economic Realities and Energy Efficient Polyphase Integral Horsepower Electric Motors  

E-Print Network [OSTI]

Energy efficient polyphase integral horsepower electric motors are currently being vigorously promoted as a profitable method of conserving energy in many industrial and commercial applications. While the goal to be attained is indeed laudable...

Whittington, B. W.

1980-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "motor systems efficiency" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

How to Improve Productivity with Energy-Efficient Motors  

E-Print Network [OSTI]

productivity is to reduce costs, particularly those which are rising faster than others such as electricity. Today's new energy efficient motors reduce the kilowatts consumed, thus reducing electric bills and improving productivity. This paper will discuss...

Curley, J. P.

1983-01-01T23:59:59.000Z

42

Highly Efficient Electric Motor Systems  

E-Print Network [OSTI]

engineering capabilities 路 Develop & launch products beyond fan & pump applications, i.e. 路 Electric vehicle performance for same cost Replaces or simplifies mechanical belts, pulleys and gearboxes Delivers 2X torque and Menlo Ventures Low-cost manufacturing automation developed POs received for early products Projected

43

Rotary steerable motor system for underground drilling  

DOE Patents [OSTI]

A preferred embodiment of a system for rotating and guiding a drill bit in an underground bore includes a drilling motor and a drive shaft coupled to drilling motor so that drill bit can be rotated by the drilling motor. The system further includes a guidance module having an actuating arm movable between an extended position wherein the actuating arm can contact a surface of the bore and thereby exert a force on the housing of the guidance module, and a retracted position.

Turner, William E. (Durham, CT); Perry, Carl A. (Middletown, CT); Wassell, Mark E. (Kingwood, TX); Barbely, Jason R. (Middletown, CT); Burgess, Daniel E. (Middletown, CT); Cobern, Martin E. (Cheshire, CT)

2010-07-27T23:59:59.000Z

44

Rotary steerable motor system for underground drilling  

DOE Patents [OSTI]

A preferred embodiment of a system for rotating and guiding a drill bit in an underground bore includes a drilling motor and a drive shaft coupled to drilling motor so that drill bit can be rotated by the drilling motor. The system further includes a guidance module having an actuating arm movable between an extended position wherein the actuating arm can contact a surface of the bore and thereby exert a force on the housing of the guidance module, and a retracted position.

Turner, William E. (Durham, CT); Perry, Carl A. (Middletown, CT); Wassell, Mark E. (Kingwood, TX); Barbely, Jason R. (Middletown, CT); Burgess, Daniel E. (Middletown, CT); Cobern, Martin E. (Cheshire, CT)

2008-06-24T23:59:59.000Z

45

Electrical system for a motor vehicle  

DOE Patents [OSTI]

In one embodiment of the present invention, an electrical system for a motor vehicle comprises a capacitor, an engine cranking motor coupled to receive motive power from the capacitor, a storage battery and an electrical generator having an electrical power output, the output coupled to provide electrical energy to the capacitor and to the storage battery. The electrical system also includes a resistor which limits current flow from the battery to the engine cranking motor. The electrical system further includes a diode which allows current flow through the diode from the generator to the battery but which blocks current flow through the diode from the battery to the cranking motor. 2 figs.

Tamor, M.A.

1999-07-20T23:59:59.000Z

46

Electrical system for a motor vehicle  

DOE Patents [OSTI]

In one embodiment of the present invention, an electrical system for a motor vehicle comprises a capacitor, an engine cranking motor coupled to receive motive power from the capacitor, a storage battery and an electrical generator having an electrical power output, the output coupled to provide electrical energy to the capacitor and to the storage battery. The electrical system also includes a resistor which limits current flow from the battery to the engine cranking motor. The electrical system further includes a diode which allows current flow through the diode from the generator to the battery but which blocks current flow through the diode from the battery to the cranking motor.

Tamor, Michael Alan (Toledo, OH)

1999-01-01T23:59:59.000Z

47

3.1. MOTOR SYSTEM 35 3.1 Motor System  

E-Print Network [OSTI]

3.1. MOTOR SYSTEM 35 3.1 Motor System The motor system comprises the dynamic model of the fish fish's brain. Since our goal is to animate an animal realistically and at reasonable computational cost controllers by gleaning information from the fish biomechanics literature (Blake, 1983; Alexander, 1992

Toronto, University of

48

Oscillation control system for electric motor drive  

DOE Patents [OSTI]

A feedback system for controlling mechanical oscillations in the torsionally complaint drive train of an electric or other vehicle. Motor speed is converted in a processor to estimate state signals in which a plant model which are used to electronically modify thetorque commands applied to the motor.

Slicker, James M. (Union Lake, MI); Sereshteh, Ahmad (Union Lake, MI)

1988-01-01T23:59:59.000Z

49

Oscillation control system for electric motor drive  

DOE Patents [OSTI]

A feedback system for controlling mechanical oscillations in the torsionally complaint drive train of an electric or other vehicle. Motor speed is converted in a processor to estimate state signals in which a plant model which are used to electronically modify the torque commands applied to the motor. 5 figs.

Slicker, J.M.; Sereshteh, A.

1988-08-30T23:59:59.000Z

50

Optimization of induction motor efficiency: Volume 2, Single-phase induction motors: Final report  

SciTech Connect (OSTI)

The optimal design of the motor dimensions, the capacitance of the run capacitor, the winding distribution and the choice of the electrical steel are the most important sources for an improvement of the efficiency of modern single-phase induction motors for given performance and material cost constraints. The formulation of the techniques which realize this optimization is based on nonlinear programming approaches. The Method of Boundary Search Along Active Constraints is used for the optimal design of the motor dimensions of a commercially available 2 hp, 115 V single-phase induction motor. Based on the optimization results due to the above mentioned four optimization components, the relationships between efficiency, power factor, cost, active materials and the values of the capacitance of the run capacitor are studied and the limited validity of the model law is discussed. This report also explains why the Wanlass retrofit improves efficiency and details the advantages and disadvantages of such a retrofitting as compared with the operation in the standard configuration.

Fuchs, E.F.; Huang, H.; Vandenput, A.J.; Holl, J.; Appelbaum, J.; Zak, Z.; Erlicki, M.S.

1987-05-01T23:59:59.000Z

51

Efficient, High-Torque Electric Vehicle Motor: Advanced Electric Vehicle Motors with Low or No Rare Earth Content  

SciTech Connect (OSTI)

REACT Project: QM Power will develop a new type of electric motor with the potential to efficiently power future generations of EVs without the use of rare-earth-based magnets. Many of today抯 EV motors use rare earth magnets to efficiently provide torque to the wheels. QM Power抯 motors would contain magnets that use no rare earth minerals, are light and compact, and can deliver more power with greater efficiency and at reduced cost. Key innovations in this project include a new motor design with iron-based magnetic materials, a new motor control technique, and advanced manufacturing techniques that substantially reduce the cost of the motor. The ultimate goal of this project is to create a cost-effective EV motor that offers the rough peak equivalent of 270 horsepower.

None

2012-01-01T23:59:59.000Z

52

United States Industrial Motor-Driven Systems Market Assessment...  

Broader source: Energy.gov (indexed) [DOE]

Motor-Driven Systems Market Assessment: Charting a Roadmap to Energy Savings for Industry United States Industrial Motor-Driven Systems Market Assessment: Charting a Roadmap to...

53

Electric motor/controller design tradeoffs for noise, weight, and efficiency  

SciTech Connect (OSTI)

It is common for an AUV [Autonomous Underwater Vehicle] designer to be put in the position of a subsystem hardware integrator. In the case of electric motors and controllers this may be more by necessity than choice because a suitable subsystems supplier cannot be found. As a result, motors and controllers are purchased from various manufacturers who may optimize the design of each part but hold system performance secondary in importance. Unlike hydraulics, an electric motor/controller system presents significant opportunities to improve noise, weight, and efficiency. But, these opportunities can best be recognized by a single source who not only understands the technology but has the ability to implement them in the development and manufacture of the product. An analysis is presented which explains the various design considerations of noise, weight and efficiency of electric motors and controllers for submersible AUV`s. In concert with the design considerations, their interrelationships are discussed as to how they affect each other in the overall optimization of the system. In conclusion, a matrix is created which shows how the resultant system parameters of noise, weight, and efficiency may be ``traded off`` to tailor the best overall system for the application. 1 ref.

Kopp, N.L.; Brown, G.W.

1994-12-31T23:59:59.000Z

54

Improving Motor and Drive System Performance: A Sourcebook for Industry  

SciTech Connect (OSTI)

This is one in a series of sourcebooks to assist industrial personnel in understanding and optimizing motors and motor-driven systems

Not Available

2008-09-01T23:59:59.000Z

55

Improving Motor and Drive System Performance - A Sourcebook for...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

motors and drives, as well as resources for additional information, tools, software, videos, and training opportunities. Improving Motor and Drive System Performance - A...

56

IMPROVING ENERGY EFFICIENCY AND REDUCING COSTS IN THE DRINKING WATER SUPPLY INDUSTRY: An ENERGY STAR Resource Guide for Energy and Plant Managers  

E-Print Network [OSTI]

Efficiency Alliance, Electric Motor Management. 2001. Motor2002. United States Industrial Electric Motor Systems Marketaccessed March 23, Motors Electric motors represent one of

Brown, Moya Melody, Camilla Dunham Whitehead, Rich

2011-01-01T23:59:59.000Z

57

Oil Field Electrical Energy Savings Through Energy-Efficient Motor Retrofits  

E-Print Network [OSTI]

The Wyoming Electric Motor Training and Testing Center (WEMTTC), in conjunction with the Department of Energy-Denver Support Office and the Naval Petroleum Reserve #3 (NPR-3), has conducted an extensive study of electric motor efficiency...

Ula, S.; Bershinsky, V.; Cain, W.

58

The Head-Neck Sensory Motor System  

E-Print Network [OSTI]

The Head-Neck Sensory Motor System Edited by Alain Berthoz Laboratoire de Physiologie, sideslip, and thrust) determine its loca- tion in space, and rotations (yaw, pitch, and roll) change its, no functional significance can be attributed to this multiple sampling. Oculomotor System of Calliphora

59

System and method for motor speed estimation of an electric motor  

DOE Patents [OSTI]

A system and method for a motor management system includes a computer readable storage medium and a processing unit. The processing unit configured to determine a voltage value of a voltage input to an alternating current (AC) motor, determine a frequency value of at least one of a voltage input and a current input to the AC motor, determine a load value from the AC motor, and access a set of motor nameplate data, where the set of motor nameplate data includes a rated power, a rated speed, a rated frequency, and a rated voltage of the AC motor. The processing unit is also configured to estimate a motor speed based on the voltage value, the frequency value, the load value, and the set of nameplate data and also store the motor speed on the computer readable storage medium.

Lu, Bin (Kenosha, WI); Yan, Ting (Brookfield, WI); Luebke, Charles John (Sussex, WI); Sharma, Santosh Kumar (Viman Nagar, IN)

2012-06-19T23:59:59.000Z

60

System and method for determining stator winding resistance in an AC motor using motor drives  

SciTech Connect (OSTI)

A system and method for determining the stator winding resistance of AC motors is provided. The system includes an AC motor drive having an input connectable to an AC source and an output connectable to an input terminal of an AC motor, a pulse width modulation (PWM) converter having switches therein to control current flow and terminal voltages in the AC motor, and a control system connected to the PWM converter. The control system generates a command signal to cause the PWM converter to control an output of the AC motor drive corresponding to an input to the AC motor, selectively generates a modified command signal to cause the PWM converter to inject a DC signal into the output of the AC motor drive, and determines a stator winding resistance of the AC motor based on the DC signal of at least one of the voltage and current.

Lu, Bin; Habetler, Thomas G; Zhang, Pinjia

2013-02-26T23:59:59.000Z

Note: This page contains sample records for the topic "motor systems efficiency" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

Developing Information on Energy Savings and Associated Costs and Benefits of Energy Efficient Emerging Technologies Applicable in California  

E-Print Network [OSTI]

United States Industrial Electric Motor Systems Marketenergy is used for electric motors. These motors driveEfficiency improvements in electric motor systems have large

Xu, Tengfang

2011-01-01T23:59:59.000Z

62

Ultra-Efficient and Power Dense Electric Motors for U. S. Industry  

SciTech Connect (OSTI)

The primary purpose of this project was to combine the ease-of-installation and ease-of-use attributes of industrial induction motors with the low-loss and small size and weight advantages of PM motors to create an ultra-efficient, high power density industrial motor that can be started across-the-line or operated from a standard, Volts/Hertz drive without the need for a rotor position feedback device. PM motor products that are currently available are largely variable speed motors that require a special adjustable speed drive with rotor position feedback. The reduced size and weight helps to offset the magnet cost in order make these motors commercially viable. The scope of this project covers horsepower ratings from 20 ? 500. Prototypes were built and tested at ratings ranging from 30 to 250 HP. Since fans, pumps and compressors make up a large portion of industrial motor applications, the motor characteristics are tailored to those applications. Also, since there is extensive use of adjustable frequency inverters in these applications, there is the opportunity to design for an optimal pole number and operate at other than 60 Hz frequency when inverters are utilized. Designs with four and eight pole configurations were prototyped as part of this work. Four pole motors are the most commonly used configuration in induction motors today. The results of the prototype design, fabrication, and testing were quite successful. The 50 HP rating met all of the design goals including efficiency and power density. Tested values of motor losses at 50 HP were 30% lower than energy efficient induction motors and the motor weight is 35% lower than the energy efficient induction motor of the same rating. Further, when tested at the 30 HP rating that is normally built in this 286T frame size, the efficiency far exceeds the project design goals with 30 HP efficiency levels indicating a 55% reduction in loss compared to energy efficient motors with a motor weight that is a few percentage points lower than the energy efficient motor. This 30 HP rating full load efficiency corresponds to a 46% reduction in loss compared to a 30 HP NEMA Premium? efficient motor. The cost goals were to provide a two year or shorter efficiency-based payback of a price premium associated with the magnet cost in these motors. That goal is based on 24/7 operation with a cost of electricity of 10 cents per kW-hr. Similarly, the 250 HP prototype efficiency testing was quite successful. In this case, the efficiency was maximized with a slightly less aggressive reduction in active material. The measured full load efficiency of 97.6% represents in excess of a 50% loss reduction compared to the equivalent NEMA Premium Efficiency induction motor. The active material weight reduction was a respectable 14.5% figure. This larger rating demonstrated both the scalability of this technology and also the ability to flexibly trade off power density and efficiency. In terms of starting performance, the 30 ? 50 HP prototypes were very extensively tested. The demonstrated capability included the ability to successfully start a load with an inertia of 25 times the motor?s own inertia while accelerating against a load torque following a fan profile at the motor?s full nameplate power rating. This capability will provide very wide applicability of this motor technology. The 250 HP prototype was also tested for starting characteristics, though without a coupled inertia and load torque. As a result it was not definitively proven that the same 25 times the motor?s own inertia could be started and synchronized successfully at 250 HP. Finite element modeling implies that this load could be successfully started, but it has not yet been confirmed by a test.

Melfi, Michael J.; Schiferl, Richard F.; Umans, Stephen D.

2013-03-12T23:59:59.000Z

63

Method and apparatus for improved efficiency in a pulse-width-modulated alternating current motor drive  

DOE Patents [OSTI]

A scheme for optimizing the efficiency of an AC motor drive operated in a pulse-width-modulated mode provides that the modulation frequency of the power furnished to the motor is a function of commanded motor torque and is higher at lower torque requirements than at higher torque requirements.

Konrad, Charles E. (Roanoke, VA); Boothe, Richard W. (Roanoke, VA)

1996-01-01T23:59:59.000Z

64

Method and apparatus for improved efficiency in a pulse-width-modulated alternating current motor drive  

DOE Patents [OSTI]

A scheme for optimizing the efficiency of an AC motor drive operated in a pulse-width-modulated mode provides that the modulation frequency of the power furnished to the motor is a function of commanded motor torque and is higher at lower torque requirements than at higher torque requirements.

Konrad, Charles E. (Roanoke, VA); Boothe, Richard W. (Roanoke, VA)

1994-01-01T23:59:59.000Z

65

Method and apparatus for improved efficiency in a pulse-width-modulated alternating current motor drive  

DOE Patents [OSTI]

A scheme for optimizing the efficiency of an AC motor drive operated in a pulse-width-modulated mode provides that the modulation frequency of the power furnished to the motor is a function of commanded motor torque and is higher at lower torque requirements than at higher torque requirements. 6 figs.

Konrad, C.E.; Boothe, R.W.

1996-01-23T23:59:59.000Z

66

Method and apparatus for improved efficiency in a pulse-width-modulated alternating current motor drive  

DOE Patents [OSTI]

A scheme for optimizing the efficiency of an AC motor drive operated in a pulse-width-modulated mode provides that the modulation frequency of the power furnished to the motor is a function of commanded motor torque and is higher at lower torque requirements than at higher torque requirements. 6 figures.

Konrad, C.E.; Boothe, R.W.

1994-02-15T23:59:59.000Z

67

Energy Efficiency Improvement and Cost Saving Opportunities for the Petrochemical Industry - An ENERGY STAR(R) Guide for Energy and Plant Managers  

E-Print Network [OSTI]

the NEMA Premium Efficiency Electric Motor specification wason Motor Efficiency. St. Louis, Missouri. Electric ApparatusElectric Motors Systems (Chapters 10-13) Motor Systems Properly sized motors Reduce voltage unbalance High efficiency

Neelis, Maarten

2008-01-01T23:59:59.000Z

68

Topic 7 Organization of Motor System -Cortical Motor Areas  

E-Print Network [OSTI]

Cartoon, 1986 Electrical stimulation produces movement of contralateral body parts. #12;4 Motor Homunculus previous stimulation technique 路 Insert electrode into cortical layer V and use electrical stimulation" somatotopic map vs "more complex" map #12;

Sergio, Lauren E.

69

Abstract--There are two types of drivers in production machine systems: constant velocity (CV) motor and servo-motor.  

E-Print Network [OSTI]

the dynamic model of the five-bar hybrid mechanism including its electric motors. Section 3 presents) motor and servo-motor. If a system contains two drivers or more, among which some are of the CV motor while the other are the servo-motor, the system has the so-called hybrid driver architecture

Zhang, WJ "Chris"

70

Opportunities to change development pathways toward lower greenhouse gas emissions through energy efficiency  

E-Print Network [OSTI]

Energy-efficiency standards for electric motors in Brazil-Electric Motor Systems Market Opportunities Assessment. Office of Energy Efficiency

Sathaye, Jayant

2010-01-01T23:59:59.000Z

71

Replacing Motors Counting Savings: Results from a 100 Motor Study  

E-Print Network [OSTI]

REPLACING MOTORS, COUNTING SAVINGS: RESULTS FROM A 100 MOTOR STUDY Nicole M. Kaufman Motor Systems Engineer Advanced Energy Raleigh, NC ABSTRACT Software tools such as MotorMaster+ aid facility personnel in conducting payback... analyses for replacing motors. These tools make assumptions on the motors operational efficiency in their calculations. By observing 100 pre-EPCA (Energy Policy & Conservation Act) motors in operation, removing them from service and conducting IEEE...

Kaufman, N. M.

2006-01-01T23:59:59.000Z

72

9.373 Somatosensory and Motor Systems, Spring 2002  

E-Print Network [OSTI]

General principles of motor control in biological systems. Structure and function of sensory receptors. Muscle structure and reflex arcs. Spinal cord. Locomotion. Oculomotor control. Cerebellar structure and function. Motor ...

Bizzi, Emilio

73

Improving Energy Efficiency of Compressed Air System Based on System Audit  

E-Print Network [OSTI]

energy efficiency goals and adopt energy conservation measures. Application of the types of compressed air best practicesEnergy Efficiency and Market Potential of Electric Motor System in China. China Machine Pressu re, [4] Best Practices

Shanghai, Hongbo Qin; McKane, Aimee

2008-01-01T23:59:59.000Z

74

Training: Motor Systems | Department of Energy  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-Up from theDepartment of EnergyThe Sun andDepartment ofFan Systems Training:Motor

75

Variable Frequency Motor Drives: Harmonics, Power Factor, and Energy Efficiency  

E-Print Network [OSTI]

Variable frequency motor drives (VFD's) have been on the market for many years. Early versions were unreliable and prone to failure. Relatively recent developments in Pulse-Width Modulated (PWM) waveform technology have improved VFD reliability...

Massey, G. W.

76

Electric Motor Maintenance & Repair for Long Term Efficiency  

E-Print Network [OSTI]

Energy costs to operate electric motors can be a significant part of an operating budget. For example, a recent survey of California water departments reveals energy costs for pumping and treating water may be 25% of operating costs. Strategies...

Brithinee, W. P.

77

Development of Ultra-Efficient Electric Motors Final Technical Report Covering work from April 2002 through September 2007  

SciTech Connect (OSTI)

High temperature superconducting (HTS) motors offer the potential for dramatic volume and loss reduction compared to conventional, high horspower, industrial motors. This report is the final report on the results of eight research tasks that address some of the issues related to HTS motor development that affect motor efficiency, cost, and reliability.

Rich Schiferl

2008-05-30T23:59:59.000Z

78

United States Industrial Motor Systems Market Opportunities Assessment...  

Broader source: Energy.gov (indexed) [DOE]

Executive Summary (December 1998) More Documents & Publications United States Industrial Electric Motor Systems Market Opportunities Assessment Pulp and Paper Mills: Profiting...

79

A motor drive control system for the Lidar Polarimeter  

E-Print Network [OSTI]

A MOTOR DRIVE CONTROL SYSTEM FOR THE LIDAR POLARIMETER A Thesis by Waiming Leung Submitted to the Graduate College of Texas A/M University in partial fulfillment of the requirement for the degree of MASTER OF SCIENCF, May 1977 Major... Subject: Electrical Engineering A MOTOR DRIVE CONTROL SYSTEM FOR THE LIDAR POLARIMETER A Thesis by Waiming Leung Approved as to style and content by: Chairman o Comm' ee ea o epartment Member Mem er May 1977 ABSTRACT A Motor Drive Control...

Leung, Waiming

1977-01-01T23:59:59.000Z

80

DATE : NVLAP LAB CODE: NVLAP EFFICIENCY OF ELECTRIC MOTORS APPLICATION (REV. 2013-06-11) PAGE 1 OF 1  

E-Print Network [OSTI]

DATE : NVLAP LAB CODE: NVLAP EFFICIENCY OF ELECTRIC MOTORS APPLICATION (REV. 2013-06-11) PAGE 1 OF 1 EFFICIENCY OF ELECTRIC MOTORS TEST METHOD SELECTION LIST Instructions: Check each test method01* IEEE 112 Method B Test Procedure for Polyphase Induction Motors and Generators (for accreditation

Note: This page contains sample records for the topic "motor systems efficiency" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

Impact of New Federal Efficiency Performance Standards on the Industrial Motor Marketplace  

E-Print Network [OSTI]

Impact of New Federal Efficiency Performance Standards on the Industrial Motor Marketplace R. Neal Elliott, Ph.D., P.E. Associate Director for Research American Council for an Energy-Efficient Economy Washington, DC ABSTRACT.... As noted above, beginning in the 1980's, the National Electrical Manufacturers' Association (NEMA) began including energy efficiency labeling requirements in its major stand MG-1. The efficiencies were based upon the Institute of Electrical...

Elliott, R. N.

82

The United States Industrial Electric Motor Systems Market Opportunities Assessment: Key Results  

E-Print Network [OSTI]

portrait of the inventory of motor systems currently in use in US industrial facilities, estimate motor system energy use and potential for energy savings. The research and analysis to support these objectives consisted primarily of on-site motor system...

Rosenberg, M.

83

High efficiency pulse motor drive for robotic propulsion  

E-Print Network [OSTI]

The goal of this research is to improve the power efficiency of robotic locomotion through the use of series elastic actuation, with a focus on swimming motion. To achieve high efficiency, electromechanical drives need to ...

Sun, Zhen, M.S. Massachusetts Institute of Technology

2013-01-01T23:59:59.000Z

84

Techniques for energy conservation in ac motor-driven systems. Final report  

SciTech Connect (OSTI)

Techniques for energy conservation of reducing losses in ac motor-driven systems proposed by the technical community in response to surging cost of energy are evaluated and compared. Report objectives are to provide better understanding of underlying principles and to evaluate technical and economic viability of these techniques for various applications. An important aspect considered is the impact on electric utility system in terms of harmonics, power factor of operation, and Electro-Magnetic Interference (EMI). The techniques evaluated are: NASA Power Factor Controller, a simple device for reducing power losses in lightly loaded ac motors; wanlass motor modification, a scheme of reconnecting motor windings with capacitors in series, with the intention of improving the motor efficiencies under all loading conditions; conventional variable frequency solid-state inverters which can control the speed of ac motors by producing adjustable frequency ac voltage, with a significant potential for energy conservation in pumps and air-handling systems; and other variable frequency drives and schemes including cycloconverters, slip-recovery scheme, Exxon Alternating Current Synthesizer, Venturini conversion technique, permanent magnet synchronous motors, and a device called the Phase-Liner. The impact of rapid growth in semiconductors and magnetic materials technologies is also considered.

Mohan, N.

1981-09-01T23:59:59.000Z

85

Development of a New Extended Motor Product Label for Industrial Energy Efficiency  

E-Print Network [OSTI]

opportunities ESL-IE-14-05-11 Proceedings of the Thrity-Sixth Industrial Energy Technology Conference New Orleans, LA. May 20-23, 2014 Prescriptive Rebate Programs Provides a rebate for specific products that have been determined to be more efficient... of the Thrity-Sixth Industrial Energy Technology Conference New Orleans, LA. May 20-23, 2014 Example: Prescriptive Rebates Example: NEMA Premium Label identifies highest efficiency motors Label is acceptable documentation for efficiency programs...

Rogers, E.; Boteler, R.; Elliot, R. N.

2014-01-01T23:59:59.000Z

86

Counter-Rotating Tandem Motor Drilling System  

SciTech Connect (OSTI)

Gas Technology Institute (GTI), in partnership with Dennis Tool Company (DTC), has worked to develop an advanced drill bit system to be used with microhole drilling assemblies. One of the main objectives of this project was to utilize new and existing coiled tubing and slimhole drilling technologies to develop Microhole Technology (MHT) so as to make significant reductions in the cost of E&P down to 5000 feet in wellbores as small as 3.5 inches in diameter. This new technology was developed to work toward the DOE's goal of enabling domestic shallow oil and gas wells to be drilled inexpensively compared to wells drilled utilizing conventional drilling practices. Overall drilling costs can be lowered by drilling a well as quickly as possible. For this reason, a high drilling rate of penetration is always desired. In general, high drilling rates of penetration (ROP) can be achieved by increasing the weight on bit and increasing the rotary speed of the bit. As the weight on bit is increased, the cutting inserts penetrate deeper into the rock, resulting in a deeper depth of cut. As the depth of cut increases, the amount of torque required to turn the bit also increases. The Counter-Rotating Tandem Motor Drilling System (CRTMDS) was planned to achieve high rate of penetration (ROP) resulting in the reduction of the drilling cost. The system includes two counter-rotating cutter systems to reduce or eliminate the reactive torque the drillpipe or coiled tubing must resist. This would allow the application of maximum weight-on-bit and rotational velocities that a coiled tubing drilling unit is capable of delivering. Several variations of the CRTDMS were designed, manufactured and tested. The original tests failed leading to design modifications. Two versions of the modified system were tested and showed that the concept is both positive and practical; however, the tests showed that for the system to be robust and durable, borehole diameter should be substantially larger than that of slim holes. As a result, the research team decided to complete the project, document the tested designs and seek further support for the concept outside of the DOE.

Kent Perry

2009-04-30T23:59:59.000Z

87

Efficient Reinforcement Learning for Motor Control Marc Peter Deisenroth and Carl Edward Rasmussen  

E-Print Network [OSTI]

Efficient Reinforcement Learning for Motor Control Marc Peter Deisenroth and Carl Edward Rasmussen Department of Engineering, University of Cambridge Trumpington Street, Cambridge CB2 1PZ, UK Abstract Research Foun- dation (DFG) through grant RA 1030/1-3 to CE Rasmussen. is to reduce the interactions

Ghahramani, Zoubin

88

Industrial DSM: Beyond High Efficiency Lights and Motors  

E-Print Network [OSTI]

on behalf of electric utilities. These represent real-world solutions to problems in actual industrial plants in many different types of industries. DSM IN LOW TEMPERATURE REFRIGERAnON SYST M APPLICAnONS Industrial refrigeration equipment is highly... energy-intensive. In many dairy procl::."ing plants in particular, refrigeration systems are the largest electricity consumers, repre enting as much as 75 percent of plant peak demand. The availability of the refrigeration system is critical...

Appelbaum, B.

89

Efficiency consideration of DC link soft-switching inverters for motor drive applications  

SciTech Connect (OSTI)

This paper critically evaluates efficiency of soft switching inverters including an actively clamped resonant dc link inverter and a clamped-mode resonant pole inverter. An analytical approach to evaluating efficiency of the clamped-mode soft switching inverter has been developed. The evaluation results are compared with that of the standard pulse-width-modulation (PWM) inverter. A 50-kW induction motor is used as the variable load, and the inverter efficiency is evaluated under different speed and torque conditions. The clamped-mode soft-switching inverter, although eliminating the switching loss, shows poor efficiency over the entire load range. Under low load conditions, the efficiency profile is even worse. The actively clamped resonant dc link inverter shows highest efficiency over the entire speed and torque range. However, its energy saving over the standard PWM inverter is marginal under full load or high speed conditions.

Lai, J.S.; Young, R.W.; McKeever, J.W.

1994-12-31T23:59:59.000Z

90

Motors  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: VegetationEquipment SurfacesResource ProgramModification andinterface1 EEnergy, OfficeMotors Sign In

91

Energy Efficiency Improvement and Cost Saving Opportunities for the Vehicle Assembly Industry: An ENERGY STAR Guide for Energy and Plant Managers  

E-Print Network [OSTI]

Oversized and Underloaded Electric Motor. Office of EnergyUnited States Industrial Electric Motor Systems Marketthe NEMA Premium Efficiency Electric Motor specification was

Galitsky, Christina

2008-01-01T23:59:59.000Z

92

A test platform for measuring the energy efficiency of AC induction motors under various loading conditions and control schemes/  

E-Print Network [OSTI]

A test platform was developed to measure and compare the energy efficiency of an AC induction motor under steady-state and cyclical loading conditions while operating in both a constant speed mode and while performing speed ...

Granata, John A. (John Anthony)

2012-01-01T23:59:59.000Z

93

Pupillary efficient lighting system  

DOE Patents [OSTI]

A lighting system having at least two independent lighting subsystems each with a different ratio of scotopic illumination to photopic illumination. The radiant energy in the visible region of the spectrum of the lighting subsystems can be adjusted relative to each other so that the total scotopic illumination of the combined system and the total photopic illumination of the combined system can be varied independently. The dilation or contraction of the pupil of an eye is controlled by the level of scotopic illumination and because the scotopic and photopic illumination can be separately controlled, the system allows the pupil size to be varied independently of the level of photopic illumination. Hence, the vision process can be improved for a given level of photopic illumination.

Berman, Samuel M. (San Francisco, CA); Jewett, Don L. (Mill Valley, CA)

1991-01-01T23:59:59.000Z

94

Improved Design of Motors for Increased Efficiency in Residential Commercial Buildings  

SciTech Connect (OSTI)

Research progress on understanding magnetic steel core losses is presented in this report. Three major aspects have been thoroughly investigated: 1, experimental characterization of core losses, 2, fundamental physical understanding of core losses and development of core loss formulas, and 3, design of more efficient machine based on the new formulations. Considerable progress has been achieved during the four years of research and the main achievements are summarized in the following: For the experimental characterization, a specially designed advanced commercial test bench was commissioned in addition to the development of a laboratory system with advanced capabilities. The measured properties are core losses at low and higher frequencies, with sinusoidal and non-sinusoidal excitations, at different temperatures, with different measurement apparatus (Toroids, Epstein etc). An engineering-based core loss formula has been developed which considers skin effect. The formula can predict core losses for both sinusoidal and non-sinusoidal flux densities and frequencies up to 4000 Hz. The formula is further tested in electric machines. The formula error range is 1.1% - 7.6% while the standard formulas can have % errors between -8.5% {-+} 44.7%. Two general core loss formulas, valid for different frequencies and thickness, have been developed by analytically and numerically solving Maxwell's equations based on a physical investigation of the dynamic hysteresis effects of magnetic materials. To our knowledge, they are the first models that can offer accurate core loss prediction over a wide range of operating frequencies and lamination thicknesses without a massive experimental database of core losses. The engineering core loss formula has been used with commercial software. The formula performs better than the modified Steinmetz and Bertotti's model used in Cedrat/Magsoft Flux 2D/3D. The new formula shows good correlation with measured results under both sinusoidal and non-sinusoidal excitations. A permanent magnet synchronous motor has been designed with the use of the engineering formula with Flux2D. There was acceptable agreement between predictions and measurements. This was further tested on an induction motor with toroid results.

Pragasen Pillay

2008-12-31T23:59:59.000Z

95

Electrical Equipment Replacement: Energy Efficiency versus System Compatibility  

E-Print Network [OSTI]

end users to select the most energy efficient equipment when replacing motors, motor drives, transformers, lamps, ballasts, etc., given costs associated with energy consumption when compared with installation. The selection of replacement parts...

Massey, G. W.

2005-01-01T23:59:59.000Z

96

Direct Torque Control for Interior Permanent Magnet Synchronous Motors with Respect to Optimal Efficiency  

E-Print Network [OSTI]

motors (PMSM) increased significantly. Thus, this motor type becomes more and more attractive for drive-axis current of the motor must not be controlled to zero, as it is common with non-salient PMSM. Thus

Paderborn, Universit盲t

97

MIT Electric Vehicle Team Porsche designing a cooling system for the AC24 electric motor  

E-Print Network [OSTI]

In this thesis I worked on the design and analysis of a cooling system for the electric motor of the MIT Electric Vehicle Team's Porsche 914 Battery Electric Vehicle. The vehicle's Azure Dynamics AC24 motor tended to ...

Meenen, Jordan N

2010-01-01T23:59:59.000Z

98

Motor Systems Assessment Training, Including Use of the Motor Systems Tool Suite  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustion | Department ofT ib l L d F S i DOE TribaltheMyMinutesDepartmentCharacteristics | Motor

99

Water/Wastewater Engineering Report (High Efficiency Pump/Motor Replacement - M2 Model)  

E-Print Network [OSTI]

Pumping water or wastewater is the largest use of electricity for a municipal water supply or wastewater treatment plant. Increasing the overall efficiency of the pumping system can achieve significant energy savings. Overall pump system...

Liu, Z.; Brumbelow, K.; Haberl, J. S.

2006-10-30T23:59:59.000Z

100

Electric Motor Drive Selection Issues for HEV Propulsion Systems: A Comparative Study  

E-Print Network [OSTI]

Electric Motor Drive Selection Issues for HEV Propulsion Systems: A Comparative Study M. Zeraoulia1 Combustion Engine (ICE) and the electric motor to deliver power in parallel to drive the wheels. Since both the ICE and electric motor are generally coupled to the drive shaft of the wheels via two clutches

Paris-Sud XI, Universit茅 de

Note: This page contains sample records for the topic "motor systems efficiency" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

1 of 5 Copyright 2007 Tesla Motors Updated: December 19, 2007 The Tesla Roadster Battery System  

E-Print Network [OSTI]

1 of 5 Copyright 漏 2007 Tesla Motors Updated: December 19, 2007 The Tesla Roadster Battery System Tesla Motors August 16, 2006 By Gene Berdichevsky, Kurt Kelty, JB Straubel and Erik Toomre Summary a primary criterion in the pack's design and architecture. #12;2 of 5 Copyright 漏 2007 Tesla Motors Updated

Laughlin, Robert B.

102

Low-cost motor drive embedded fault diagnosis systems  

E-Print Network [OSTI]

Electric motors are used widely in industrial manufacturing plants. Bearing faults, insulation faults, and rotor faults are the major causes of electric motor failures. Based on the line current analysis, this dissertation mainly deals with the low...

Akin, Bilal

2009-05-15T23:59:59.000Z

103

Electric Motors  

Broader source: Energy.gov [DOE]

Section 313 of the Energy Independence and Security Act (EISA) of 2007 raised Federal minimum efficiency standards for general-purpose, single-speed, polyphase induction motors of 1 to 500 horsepower (hp). This new standard took effect in December 2010. The new minimum efficiency levels match FEMP's performance requirement for these motors.

104

Energy Efficient Nanoelectronic System Design  

E-Print Network [OSTI]

://www.newairplane.com One 787 Battery: 12 Cells / 32 V DC 05/21/2013 6 #12;Why Energy Efficient Design ? Environmental energy-efficient designs. How to perform high-yield, energy efficient designs. How to perform effortless, high-yield, energy efficient designs. Gate Gate Gate Source D rain Graphene Layer 05/21/2013 14

Mohanty, Saraju P.

105

Method and apparatus for generating motor current spectra to enhance motor system fault detection  

DOE Patents [OSTI]

A method and circuitry for sampling periodic amplitude modulations in a nonstationary periodic carrier wave to determine frequencies in the amplitude modulations. The method and circuit are described in terms of an improved motor current signature analysis. The method insures that the sampled data set contains an exact whole number of carrier wave cycles by defining the rate at which samples of motor current data are collected. The circuitry insures that a sampled data set containing stationary carrier waves is recreated from the analog motor current signal containing nonstationary carrier waves by conditioning the actual sampling rate to adjust with the frequency variations in the carrier wave. After the sampled data is transformed to the frequency domain via the Discrete Fourier Transform, the frequency distribution in the discrete spectra of those components due to the carrier wave and its harmonics will be minimized so that signals of interest are more easily analyzed.

Linehan, Daniel J. (Knoxville, TN); Bunch, Stanley L. (Oak Ridge, TN); Lyster, Carl T. (Knoxville, TN)

1995-01-01T23:59:59.000Z

106

Method and apparatus for generating motor current spectra to enhance motor system fault detection  

DOE Patents [OSTI]

A method and circuitry are disclosed for sampling periodic amplitude modulations in a nonstationary periodic carrier wave to determine frequencies in the amplitude modulations. The method and circuit are described in terms of an improved motor current signature analysis. The method insures that the sampled data set contains an exact whole number of carrier wave cycles by defining the rate at which samples of motor current data are collected. The circuitry insures that a sampled data set containing stationary carrier waves is recreated from the analog motor current signal containing nonstationary carrier waves by conditioning the actual sampling rate to adjust with the frequency variations in the carrier wave. After the sampled data is transformed to the frequency domain via the Discrete Fourier Transform, the frequency distribution in the discrete spectra of those components due to the carrier wave and its harmonics will be minimized so that signals of interest are more easily analyzed. 29 figs.

Linehan, D.J.; Bunch, S.L.; Lyster, C.T.

1995-10-24T23:59:59.000Z

107

Method and system for operating an electric motor  

DOE Patents [OSTI]

Methods and systems for operating an electric motor having a plurality of windings with an inverter having a plurality of switches coupled to a voltage source are provided. A first plurality of switching vectors is applied to the plurality of switches. The first plurality of switching vectors includes a first ratio of first magnitude switching vectors to second magnitude switching vectors. A direct current (DC) current associated with the voltage source is monitored during the applying of the first plurality of switching vectors to the plurality of switches. A second ratio of the first magnitude switching vectors to the second magnitude switching vectors is selected based on the monitoring of the DC current associated with the voltage source. A second plurality of switching vectors is applied to the plurality of switches. The second plurality of switching vectors includes the second ratio of the first magnitude switching vectors to the second magnitude switching vectors.

Gallegos-Lopez, Gabriel; Hiti, Silva; Perisic, Milun

2013-01-22T23:59:59.000Z

108

Forward and reverse control system for induction motors  

DOE Patents [OSTI]

A control system for controlling the direction of rotation of a rotor of an induction motor includes an array of five triacs with one of the triacs applying a current of fixed phase to the windings of the rotor and four of the triacs being switchable to apply either hot ac current or return ac current to the stator windings so as to reverse the phase of current in the stator relative to that of the rotor and thereby reverse the direction of rotation of the rotor. Switching current phase in the stator is accomplished by operating the gates of pairs of the triacs so as to connect either hot ac current or return ac current to the input winding of the stator. 1 fig.

Wright, J.T.

1987-09-15T23:59:59.000Z

109

Advanced Energy Efficient Roof System  

SciTech Connect (OSTI)

Energy consumption in buildings represents 40 percent of primary U.S. energy consumption, split almost equally between residential (22%) and commercial (18%) buildings.1 Space heating (31%) and cooling (12%) account for approximately 9 quadrillion Btu. Improvements in the building envelope can have a significant impact on reducing energy consumption. Thermal losses (or gains) from the roof make up 14 percent of the building component energy load. Infiltration through the building envelope, including the roof, accounts for an additional 28 percent of the heating loads and 16 percent of the cooling loads. These figures provide a strong incentive to develop and implement more energy efficient roof systems. The roof is perhaps the most challenging component of the building envelope to change for many reasons. The engineered roof truss, which has been around since 1956, is relatively low cost and is the industry standard. The roof has multiple functions. A typical wood frame home lasts a long time. Building codes vary across the country. Customer and trade acceptance of new building products and materials may impede market penetration. The energy savings of a new roof system must be balanced with other requirements such as first and life-cycle costs, durability, appearance, and ease of construction. Conventional residential roof construction utilizes closely spaced roof trusses supporting a layer of sheathing and roofing materials. Gypsum board is typically attached to the lower chord of the trusses forming the finished ceiling for the occupied space. Often in warmer climates, the HVAC system and ducts are placed in the unconditioned and otherwise unusable attic. High temperature differentials and leaky ducts result in thermal losses. Penetrations through the ceilings are notoriously difficult to seal and lead to moisture and air infiltration. These issues all contribute to greater energy use and have led builders to consider construction of a conditioned attic. The options considered to date are not ideal. One approach is to insulate between the trusses at the roof plane. The construction process is time consuming and costs more than conventional attic construction. Moreover, the problems of air infiltration and thermal bridges across the insulation remain. Another approach is to use structurally insulated panels (SIPs), but conventional SIPs are unlikely to be the ultimate solution because an additional underlying support structure is required except for short spans. In addition, wood spline and metal locking joints can result in thermal bridges and gaps in the foam. This study undertook a more innovative approach to roof construction. The goal was to design and evaluate a modular energy efficient panelized roof system with the following attributes: (1) a conditioned and clear attic space for HVAC equipment and additional finished area in the attic; (2) manufactured panels that provide structure, insulation, and accommodate a variety of roofing materials; (3) panels that require support only at the ends; (4) optimal energy performance by minimizing thermal bridging and air infiltration; (5) minimal risk of moisture problems; (6) minimum 50-year life; (7) applicable to a range of house styles, climates and conditions; (8) easy erection in the field; (9) the option to incorporate factory-installed solar systems into the panel; and (10) lowest possible cost. A nationwide market study shows there is a defined market opportunity for such a panelized roof system with production and semi-custom builders in the United States. Senior personnel at top builders expressed interest in the performance attributes and indicate long-term opportunity exists if the system can deliver a clear value proposition. Specifically, builders are interested in (1) reducing construction cycle time (cost) and (2) offering increased energy efficiency to the homebuyer. Additional living space under the roof panels is another low-cost asset identified as part of the study. The market potential is enhanced through construction activity levels in target marke

Jane Davidson

2008-09-30T23:59:59.000Z

110

Economic Implications of Net Metering for Stationary and Motor Vehicle Fuel Cell Systems in California  

E-Print Network [OSTI]

PWP-092 Economic Implications of Net Metering for Stationary and Motor Vehicle Fuel Cell Systems emissions, and petroleum use from motor vehicles, fuel cell vehicles (FCVs) could also act as distributed Fuel Cell Systems in California January 31, 2002 Dr. Timothy E. Lipman Ms. Jennifer L. Edwards Prof

Kammen, Daniel M.

111

System and method for determining stator winding resistance in an AC motor  

SciTech Connect (OSTI)

A system and method for determining stator winding resistance in an AC motor is disclosed. The system includes a circuit having an input connectable to an AC source and an output connectable to an input terminal of an AC motor. The circuit includes at least one contactor and at least one switch to control current flow and terminal voltages in the AC motor. The system also includes a controller connected to the circuit and configured to modify a switching time of the at least one switch to create a DC component in an output of the system corresponding to an input to the AC motor and determine a stator winding resistance of the AC motor based on the injected DC component of the voltage and current.

Lu, Bin (Kenosha, WI); Habetler, Thomas G. (Snellville, GA); Zhang, Pinjia (Atlanta, GA); Theisen, Peter J. (West Bend, WI)

2011-05-31T23:59:59.000Z

112

Improving pumping system efficiency at coal plants  

SciTech Connect (OSTI)

The industry must employ ultramodern technologies when building or upgrading power plant pumping systems thereby using fuels more efficiently. The article discusses the uses and efficiencies of positive displacement pumps, centrifugal pumps and multiple screw pumps. 1 ref., 4 figs.

Livoti, W.C.; McCandless, S.; Poltorak, R. [Baldor Electric Co. (United States)

2009-03-15T23:59:59.000Z

113

White Paper on Energy Efficiency Status of Energy-Using Products in China (2011)  

E-Print Network [OSTI]

Kai. Motor System Energy Efficiency Practical Guide [M].products in China Energy efficiency standards and labelingWhite Paper Energy Efficiency Status of Energy- Using

Zhou, Nan

2013-01-01T23:59:59.000Z

114

Motor System Upgrades Smooth the Way to Savings of $700,000 at...  

Broader source: Energy.gov (indexed) [DOE]

System Upgrades Smooth the Way to Savings of 700,000 at Chevron Refinery Motor System Upgrades Smooth the Way to Savings of 700,000 at Chevron Refinery Chevron, the largest U.S....

115

Pulp and Paper Mills: Profiting from Efficient Motor System Use |  

Broader source: Energy.gov (indexed) [DOE]

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "ofEarly Careerlumens_placard-green.epsEnergy1.pdfMarket37963 Vol. 79,Department of Energy 2-page fact

116

Motor Systems Efficiency Supply Curves | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data CenterFranconia, Virginia: Energy Resources Jump to:46 -Energieprojekte3 Climate ZoneMontrose,Stanley CapitalNorthMoscow isMotley

117

The US Motor Systems Market Assessment: Baseline and Survey Methods  

E-Print Network [OSTI]

industrial facilities, a basis for projecting changes in that inventory, and a framework for estimating the effect of Motor Challenge on industrial electric consumption. The paper describes the objectives and principal research activities of the Market...

Rosenberg, M.

118

System Cost Analysis for an Interior Permanent Magnet Motor  

SciTech Connect (OSTI)

The objective of this program is to provide an assessment of the cost structure for an interior permanent magnet ('IPM') motor which is designed to meet the 2010 FreedomCAR specification. The program is to evaluate the range of viable permanent magnet materials for an IPM motor, including sintered and bonded grades of rare earth magnets. The study considers the benefits of key processing steps, alternative magnet shapes and their assembly methods into the rotor (including magnetization), and any mechanical stress or temperature limits. The motor's costs are estimated for an annual production quantity of 200,000 units, and are broken out into such major components as magnetic raw materials, processing and manufacturing. But this is essentially a feasibility study of the motor's electromagnetic design, and is not intended to include mechanical or thermal studies as would be done to work up a selected design for production.

Peter Campbell

2008-08-01T23:59:59.000Z

119

Webinar: Highly Efficient Solar Thermochemical Reaction Systems  

Broader source: Energy.gov [DOE]

Video recording and text version of the Fuel Cell Technologies Office webinar titled "Highly Efficient Solar Thermochemical Reaction Systems," originally presented on January 13, 2015.

120

Improving Energy Efficiency of Compressed Air System Based onSystem Audit  

SciTech Connect (OSTI)

Industrial electric motor systems consume more than 600billion kWh annually, accounting for more than 50 percent of China selectricity use. The International Energy Agency estimates thatoptimizing motor systems results in an improvement of 20-25 percent,which is well-supported by experience in both the U.S. and China.Compressed air systems in China use 9.4 percent of all electricity.Compressed air use in China is growing rapidly, as new industrial plantsare built and the production processes of existing plants expand andchange. Most of these systems, whether existing or new, are not optimizedfor energy efficiency. This paper will present a practitioner'sperspective on theemergence of compressed air auditing services inChina, specifically as it pertains to Shanghai and surrounding areas.Both the methodology used and the market development of these compressedair system services will be addressed. Finally, the potential for energysaving opportunities will be described based on highlights from over 50compressed air system energy audits completed by Shanghai EnergyConservation Service Center, both during the United Nations IndustrialDevelopment Organization (UNIDO) China Motor System Energy ConservationProgram, and after this training program was completed.

Shanghai, Hongbo Qin; McKane, Aimee

2007-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "motor systems efficiency" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

Aruna Ravinagarajan System Energy Efficiency Lab  

E-Print Network [OSTI]

路 Daily weather and seasons change the total input energy System Energy Efficiency Lab 7 The task scheduler needs toThe task scheduler needs to manage energy consumptionmanage energy consumption Scheduler needs to manage: 路Energy Consumption 路Accuracy of computation System Energy Efficiency Lab 13

Wang, Deli

122

Reseach and development of energy-efficient appliance motor-compressors. Final report. Volume III: development and field test plan  

SciTech Connect (OSTI)

By means of a program of theoretical analysis, development, and testing of samples, it was found that significant improvements could be made in the energy efficiency ratio (EER) of hermetic motor-compressor assemblies. The high efficiency designs resulting from the development program are believed to be suitable for quantity production without excessive facilities cost, to have acceptable levels of performance and reliability, and to be producible at costs which will make them commercially attractive. The steps involved in the development of the improved compressor design are described in detail. The major purpose of Phase II of the project is to verify the reliability of the high-efficiency designs by means of a field demonstration program.

Nelson, R.T.; MacCarthy, P.W.

1980-09-01T23:59:59.000Z

123

Control system for a wound-rotor motor  

DOE Patents [OSTI]

A load switching circuit for switching two or more transformer taps under load carrying conditions includes first and second parallel connected bridge rectifier circuits which control the selective connection of a direct current load to taps of a transformer. The first bridge circuit is normally conducting so that the load is connected to a first tap through the first bridge circuit. To transfer the load to the second tap, a switch is operable to connect the second bridge circuit to a second tap, and when the second bridge circuit begins to conduct, the first bridge circuit ceases conduction because the potential at the second tap is higher than the potential at the first tap, and the load is thus connected to the second tap through the second bridge circuit. The load switching circuit is applicable in a motor speed controller for a wound-rotor motor for effecting tap switching as a function of motor speed while providing a stepless motor speed control characteristic.

Ellis, James N. (Chatsworth, CA)

1983-01-01T23:59:59.000Z

124

Potential for Energy Efficient Motors and Variable Speed Drives in the Petroleum and Chemical Industry  

E-Print Network [OSTI]

This paper presents an in-depth survey of motors in a refinery and a chemical plant. The potential for energy and demand savings is then determined and hence the dollar savings using a sliding rate structure currently applicable to the petrochemical...

Fendley, K. A.; Pillay, P.

125

IBM and Energy Efficiency: Energy Managemnt Systems  

E-Print Network [OSTI]

IBM and Energy Efficiency Energy management systems IBM has a long standing commitment for the Environment and energy efficiency. An environmental policy has been in place for over 40 years and the corporation is certified to both the ISO... 14001 and ISO 50001 standards. The outcome of these commitments has been outstanding results in various spheres of activity related to environmental management and energy efficiency. At the root of our success is the corporate commitment to Energy...

Veilleux, Y.

2013-01-01T23:59:59.000Z

126

System and method for motor fault detection using stator current noise cancellation  

DOE Patents [OSTI]

A system and method for detecting incipient mechanical motor faults by way of current noise cancellation is disclosed. The system includes a controller configured to detect indicia of incipient mechanical motor faults. The controller further includes a processor programmed to receive a baseline set of current data from an operating motor and define a noise component in the baseline set of current data. The processor is also programmed to acquire at least on additional set of real-time operating current data from the motor during operation, redefine the noise component present in each additional set of real-time operating current data, and remove the noise component from the operating current data in real-time to isolate any fault components present in the operating current data. The processor is then programmed to generate a fault index for the operating current data based on any isolated fault components.

Zhou, Wei (Los Angeles, CA); Lu, Bin (Kenosha, WI); Nowak, Michael P. (Menomonee Falls, WI); Dimino, Steven A. (Wauwatosa, WI)

2010-12-07T23:59:59.000Z

127

Nanocoatings for High-Efficiency Industrial Hydraulic and Tooling Systems  

SciTech Connect (OSTI)

Industrial manufacturing in the U.S. accounts for roughly one third of the 98 quadrillion Btu total energy consumption. Motor system losses amount to 1.3 quadrillion Btu, which represents the largest proportional loss of any end-use category, while pumps alone represent over 574 trillion BTU (TBTU) of energy loss each year. The efficiency of machines with moving components is a function of the amount of energy lost to heat because of friction between contacting surfaces. The friction between these interfaces also contributes to downtime and the loss of productivity through component wear and subsequent repair. The production of new replacement parts requires additional energy. Among efforts to reduce energy losses, wear-resistant, low-friction coatings on rotating and sliding components offer a promising approach that is fully compatible with existing equipment and processes. In addition to lubrication, one of the most desirable solutions is to apply a protective coating or surface treatment to rotating or sliding components to reduce their friction coefficients, thereby leading to reduced wear. Historically, a number of materials such as diamond-like carbon (DLC), titanium nitride (TiN), titanium aluminum nitride (TiAlN), and tungsten carbide (WC) have been examined as tribological coatings. The primary objective of this project was the development of a variety of thin film nanocoatings, derived from the AlMgB14 system, with a focus on reducing wear and friction in both industrial hydraulics and cutting tool applications. Proof-of-concept studies leading up to this project had shown that the constituent phases, AlMgB14 and TiB2, were capable of producing low-friction coatings by pulsed laser deposition. These coatings combine high hardness with a low friction coefficient, and were shown to substantially reduce wear in laboratory tribology tests. Selection of the two applications was based largely on the concept of improved mechanical interface efficiencies for energy conservation. In mobile hydraulic systems, efficiency gains through low friction would translate into improved fuel economy and fewer greenhouse gas emissions. Stationary hydraulic systems, accordingly, would consume less electrical power. Reduced tooling wear in machining operations would translate to greater operating yields, while lowering the energy consumed during processing. The AlMgB14 nanocoatings technology progressed beyond baseline laboratory tests into measurable energy savings and enhancements to product durability. Three key hydraulic markets were identified over the course of the project that will benefit from implementation: industrial vane pumps, orbiting valve-in-star hydraulic motors, and variable displacement piston pumps. In the vane pump application, the overall product efficiency was improved by as much as 11%. Similar results were observed with the hydraulic motors tested, where efficiency gains of over 10% were noted. For variable displacement piston pumps, overall efficiency was improved by 5%. For cutting tools, the most significant gains in productivity (and, accordingly, the efficiency of the machining process as a whole) were associated with the roughing and finishing of titanium components for aerospace systems. Use of the AlMgB14 nanocoating in customer field tests has shown that the coated tools were able to withstand machining rates as high as 500sfm (limited only by the substrate material), with relatively low flank wear when compared to other industrial offerings. AlMgB14 coated tools exhibited a 60% improvement over similarly applied TiAlN thin films. Furthermore, AlMgB14-based coatings in these particular tests lasted twice as long than their TiAlN counterparts at the 500sfm feed rates. Full implementation of the technology into the industrial hydraulic and cutting tool markets equates to a worldwide energy savings of 46 trillion BTU/year by 2030. U.S.-based GHG emissions associated with the markets identified would fall accordingly, dropping by as much as 50,000 tonnes annually.

Clifton B. Higdon III

2011-01-07T23:59:59.000Z

128

Rare-Earth-Free Traction Motor: Rare Earth-Free Traction Motor for Electric Vehicle Applications  

SciTech Connect (OSTI)

REACT Project: Baldor will develop a new type of traction motor with the potential to efficiently power future generations of EVs. Unlike today抯 large, bulky EV motors which use expensive, imported rare-earth-based magnets, Baldor抯 motor could be light, compact, contain no rare earth materials, and have the potential to deliver more torque at a substantially lower cost. Key innovations in this project include the use of a unique motor design, incorporation of an improved cooling system, and the development of advanced materials manufacturing techniques. These innovations could significantly reduce the cost of an electric motor.

None

2012-01-01T23:59:59.000Z

129

Webinar: Highly Efficient Solar Thermochemical Reaction Systems  

Broader source: Energy.gov [DOE]

The Fuel Cell Technologies Office will present a live webinar titled "Highly Efficient Solar Thermochemical Reaction Systems" on Tuesday, January 13, from 12:00 to 1:00 p.m. Eastern Standard Time.

130

Highly Efficient Solar Thermochemical Reaction Systems  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Highly Efficient, Solar Thermochemical Reaction Systems (2014 R&D 100 Award Winner) U.S. Department of Energy Fuel Cell Technologies Office 2 Question and Answer * Please type your...

131

Energy efficient operating systems and software  

E-Print Network [OSTI]

Energy efficient system design is becoming increasingly important with the proliferation of portable, battery-operated appliances such as laptops, Personal Digital Assistants (PDAs) and cellular phones. Numerous dedicated ...

Sinha, Amit, 1976-

2001-01-01T23:59:59.000Z

132

Energy efficiency improvements in Chinese compressed air systems  

E-Print Network [OSTI]

Air Systems, Paper #071 Energy efficiency improvements into increase industrial energy efficiency. As a result, morein use. Over time, energy efficiency decreases and the cost

McKane, Aimee; Li, Li; Li, Yuqi; Taranto, T.

2008-01-01T23:59:59.000Z

133

Implementing Motor Decision Plans  

E-Print Network [OSTI]

Implementing Motor Decision Plans R. Neal Elliott, Ph.D., P.E., Senior Associate American Council for an Energy-Efficient Economy (ACEEE), Washington, DC Abstract The first step to reducing energy costs and increasing reliability in motors... when a motor fails and must either be replaced or repaired. This is represented visually in Figure 1. When purchasing a motor for a new application, time is usually available to consider various options. However, once a motor has failed...

Elliott, R. N.

134

Implementing Motor Management  

E-Print Network [OSTI]

Electric motors account for sixty five percent of industrial energy consumed today. There are many opportunities to conserve electricity by using more energy efficient motors and drives. Proven technologies and practices can reduce energy...

Colip, R. L.

135

Efficient Management of Idleness in Storage Systems  

E-Print Network [OSTI]

-off between the performance of fore- ground and background tasks. As a result, the storage system is better4 Efficient Management of Idleness in Storage Systems NINGFANG MI College of William and Mary ALMA of storage sys- tems are scheduled with low priority and served during idle times. Under such conditions

Smirni, Evgenia

136

A Novel MagPipe Pipeline transportation system using linear motor drives  

SciTech Connect (OSTI)

A novel capsule pipeline transportation system using linear motor drives, called Magplane MagPipe, is under development with the intention to replace trucks and railways for hauling materials from the mine to the rail head, power plant, or processing plant with reduced operating cost and energy consumption. The initial demonstration of a MagPipe line in Inner Mongolia will be a 500-m-long double-pipe coal transport system with the design transportation capacity of 3 Mega-Mg per year. The pipeline consists of 6-m-long plastic pipe modules with an I-beam suspension system inside the pipe to carry sets of five coupled capsules. The pipe will also contain noncontinuous motor winding modules spaced at 50-m intervals. A set of Halbach-arrayed permanent magnets on the bottom of the capsules interact with the linear motor windings to provide propulsion. The motor is driven by variable frequency drives outside the pipe to control the speed. This paper briefly describes the overall MagPipe pipeline transportation system, including the preliminary conclusions of the linear synchronous motor analysis.

Fang, J.R.; Montgomery, D.B.; Roderick, L. [Magplane Technology Inc., Littleton, MA (United States)

2009-11-15T23:59:59.000Z

137

A power system includes an engine, a motor/generator operatively connected to the engine, and a starter operatively connected to at least one of the engine and the motor/generator.  

DOE Patents [OSTI]

A power system includes an engine, a motor/generator operatively connected to the engine, and a starter operatively connected to at least one of the engine and the motor/generator.

Hoff, Brian D. (East Peoria, IL); Algrain, Marcelo C. (Peoria, IL)

2008-12-09T23:59:59.000Z

138

Efficiency at maximum power of interacting molecular machines  

E-Print Network [OSTI]

We investigate the efficiency of systems of molecular motors operating at maximum power. We consider two models of kinesin motors on a microtubule: for both the simplified and the detailed model, we find that the many-body exclusion effect enhances the efficiency at maximum power of the many-motor system, with respect to the single motor case. Remarkably, we find that this effect occurs in a limited region of the system parameters, compatible with the biologically relevant range.

N. Golubeva; A. Imparato

2012-10-22T23:59:59.000Z

139

An Integrated Flywheel Energy Storage System with a Homopolar Inductor Motor/Generator and High-Frequency Drive  

E-Print Network [OSTI]

An Integrated Flywheel Energy Storage System with a Homopolar Inductor Motor/Generator and High Flywheel Energy Storage System with a Homopolar Inductor Motor/Generator and High-Frequency Drive Copyright 2003 by Perry I-Pei Tsao #12;1 Abstract An Integrated Flywheel Energy Storage System with a Homopolar

Sanders, Seth

140

Integrated Solar Thermochemical Reaction System for High Efficiency...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Integrated Solar Thermochemical Reaction System for High Efficiency Production of Electricity Integrated Solar Thermochemical Reaction System for High Efficiency Production of...

Note: This page contains sample records for the topic "motor systems efficiency" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

Ultra Efficient Combined Heat, Hydrogen, and Power System - Fact...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Ultra Efficient Combined Heat, Hydrogen, and Power System - Fact Sheet, 2011 Ultra Efficient Combined Heat, Hydrogen, and Power System - Fact Sheet, 2011 FuelCell Energy, Inc., in...

142

Ultra Efficient Combined Heat, Hydrogen, and Power System - Presentati...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Ultra Efficient Combined Heat, Hydrogen, and Power System - Presentation by FuelCell Energy, June 2011 Ultra Efficient Combined Heat, Hydrogen, and Power System - Presentation by...

143

Improving efficiency of a vehicle HVAC system with comfort modeling...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

efficiency of a vehicle HVAC system with comfort modeling, zonal design, and thermoelectric devices Improving efficiency of a vehicle HVAC system with comfort modeling, zonal...

144

Development of a High-Efficiency Zonal Thermoelectric HVAC System...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

a High-Efficiency Zonal Thermoelectric HVAC System for Automotive Applications Development of a High-Efficiency Zonal Thermoelectric HVAC System for Automotive Applications...

145

Energy Efficient HVAC System for Distributed Cooling/Heating...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Efficient HVAC System for Distributed CoolingHeating with Thermoelectric Devices Energy Efficient HVAC System for Distributed CoolingHeating with Thermoelectric Devices 2012 DOE...

146

Advanced, Energy-Efficient Hybrid Membrane System for Industrial...  

Broader source: Energy.gov (indexed) [DOE]

Advanced, Energy-Efficient Hybrid Membrane System for Industrial Water Reuse Advanced, Energy-Efficient Hybrid Membrane System for Industrial Water Reuse hybridmembranesystemsfa...

147

Technology and System Level Demonstration of Highly Efficient...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Technology and System Level Demonstration of Highly Efficient and Clean, Diesel Powered Class 8 Trucks Technology and System Level Demonstration of Highly Efficient and Clean,...

148

Ultra Efficient Combined Heat, Hydrogen, and Power System - Fact...  

Energy Savers [EERE]

Ultra Efficient Combined Heat, Hydrogen, and Power System - Fact Sheet, 2015 Ultra Efficient Combined Heat, Hydrogen, and Power System - Fact Sheet, 2015 FuelCell Energy, Inc., in...

149

Steam System Efficiency Optimized After J.R. Simplot Fertilizer...  

Broader source: Energy.gov (indexed) [DOE]

Steam System Efficiency Optimized After J.R. Simplot Fertilizer Plant Receives Energy Assessment Steam System Efficiency Optimized After J.R. Simplot Fertilizer Plant Receives...

150

Advanced Systems of Efficient Use of Electrical Energy SURE ...  

Open Energy Info (EERE)

Advanced Systems of Efficient Use of Electrical Energy SURE (Smart Grid Project) Jump to: navigation, search Project Name Advanced Systems of Efficient Use of Electrical Energy...

151

Thinking small leads to efficient HVAC system  

SciTech Connect (OSTI)

The energy efficient design of a Park Avenue office tower is discussed. The 27 story, 260,000 sq. ft. building features an energy efficient HVAC system, including separate mechanical rooms on each floor and a pre-cooling coil utilizing water from a cooling tower. The building was designed so that condenser water from the cooling tower is run through a pre-cooling coil on each floor in order to provide free cooling before the water goes through the condenser coil. The building also uses a Honeywell energy management system to control the start and stop of various mechanical equipment according to outside conditions and building loads. (MJF)

Not Available

1981-06-01T23:59:59.000Z

152

Industrial Compressed Air System Energy Efficiency Guidebook.  

SciTech Connect (OSTI)

Energy efficient design, operation and maintenance of compressed air systems in industrial plants can provide substantial reductions in electric power and other operational costs. This guidebook will help identify cost effective, energy efficiency opportunities in compressed air system design, re-design, operation and maintenance. The guidebook provides: (1) a broad overview of industrial compressed air systems, (2) methods for estimating compressed air consumption and projected air savings, (3) a description of applicable, generic energy conservation measures, and, (4) a review of some compressed air system demonstration projects that have taken place over the last two years. The primary audience for this guidebook includes plant maintenance supervisors, plant engineers, plant managers and others interested in energy management of industrial compressed air systems.

United States. Bonneville Power Administration.

1993-12-01T23:59:59.000Z

153

Thermally efficient compact fluorescent fixture systems  

SciTech Connect (OSTI)

Compact fluorescent lamps that can be inserted into conventional light fixtures are rapidly gaining acceptance as both a viable retrofit and new design approach to reducing lighting loads. Ideally, the compact fluorescent lamp should have the same light output as the incandescent lamp it replaces, but overheating inside typically small enclosed fixtures can reduce lumen output and hence lighting fixture efficiency by 15 to 20 percent. Fortunately, simple fixture modifications can erase this efficiency penalty, so that the full efficiency benefit of replacing incandescent lamps with fluorescent lamps can be realized. The paper describes such modifications and presents experimental data documenting the potential efficiency enhancement associated with thermal control systems. 4 refs., 7 figs.

Siminovitch, M.J.; Rubinstein, F.M.; Packer, M.

1991-04-01T23:59:59.000Z

154

Solar ADEPT: Efficient Solar Energy Systems  

SciTech Connect (OSTI)

Solar ADEPT Project: The 7 projects that make up ARPA-E's Solar ADEPT program, short for 'Solar Agile Delivery of Electrical Power Technology,' aim to improve the performance of photovoltaic (PV) solar energy systems, which convert the sun's rays into electricity. Solar ADEPT projects are integrating advanced electrical components into PV systems to make the process of converting solar energy to electricity more efficient.

None

2011-01-01T23:59:59.000Z

155

System and method for monitoring and controlling stator winding temperature in a de-energized AC motor  

DOE Patents [OSTI]

A system and method for measuring and controlling stator winding temperature in an AC motor while idling is disclosed. The system includes a circuit having an input connectable to an AC source and an output connectable to an input terminal of a multi-phase AC motor. The circuit further includes a plurality of switching devices to control current flow and terminal voltages in the multi-phase AC motor and a controller connected to the circuit. The controller is configured to activate the plurality of switching devices to create a DC signal in an output of the motor control device corresponding to an input to the multi-phase AC motor, determine or estimate a stator winding resistance of the multi-phase AC motor based on the DC signal, and estimate a stator temperature from the stator winding resistance. Temperature can then be controlled and regulated by DC injection into the stator windings.

Lu, Bin (Kenosha, WI); Luebke, Charles John (Sussex, WI); Habetler, Thomas G. (Snellville, GA); Zhang, Pinjia (Atlanta, GA); Becker, Scott K. (Oak Creek, WI)

2011-12-27T23:59:59.000Z

156

Voltage control of emerging distribution systems with induction motor loads using robust LQG approach  

E-Print Network [OSTI]

, electricity is mainly produced by large generation plants, generally located near the primary energy sources has significant performance to improve the voltage profile of the distributed generation system & Sons, Ltd. key words: distributed generation; eigenvalue; H1 norm; induction motor; linear quadratic

Pota, Himanshu Roy

157

Motor Energy Saving Opportunities in an Industrial Plant  

E-Print Network [OSTI]

Industrial plants have enormous energy saving opportunities with electric motors. Improving motor efficiency is a conventional wisdom to save energy. Re-engineering affords far greater savings opportunities than motor efficiency improvement. Motor...

Kumar, B.; Elwell, A.

158

Best Practices for Energy Efficient Cleanrooms Efficient HVAC Systems: Variable-Speed-Drive Chillers  

E-Print Network [OSTI]

LBNL-58636 Best Practices for Energy Efficient Cleanrooms Efficient HVAC Systems: Variable Efficient Cleanrooms Efficient HVAC Water Systems: Variable-Speed-Drive Chillers Tengfang Xu Contents HVAC.................................................................................................................................... 6 #12;HVAC Water Systems Variable-Speed-Drive Chillers Summary Cleanroom energy benchmarking data

159

Energy Efficiency Improvement and Cost Saving Oportunities for the Concrete Industry  

E-Print Network [OSTI]

the NEMA Premium Efficiency Electric Motor specification wason Motor Efficiency. St. Louis, Missouri. Electric Apparatus

Kermeli, Katerina

2013-01-01T23:59:59.000Z

160

Propulsion system for a motor vehicle using a bidirectional energy converter  

DOE Patents [OSTI]

A motor vehicle propulsion system includes an electrical energy source and a traction motor coupled to receive electrical energy from the electrical energy source. The system also has a first bus provided electrical energy by the electrical energy source and a second bus of relatively lower voltage than the first bus. In addition, the system includes an electrically-driven source of reaction gas for the electrical energy source, the source of reaction gas coupled to receive electrical energy from the first bus. Also, the system has an electrical storage device coupled to the second bus for storing electrical energy at the lower voltage. The system also includes a bidirectional energy converter coupled to convert electrical energy from the first bus to the second bus and from the second bus to the first bus.

Tamor, Michael Alan (Toledo, OH); Gale, Allan Roy (Livonia, MI)

1999-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "motor systems efficiency" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

Lean Gasoline System Development for Fuel Efficient Small Cars  

SciTech Connect (OSTI)

The General Motors and DOE cooperative agreement program DE-EE0003379 is completed. The program has integrated and demonstrated a lean-stratified gasoline engine, a lean aftertreatment system, a 12V Stop/Start system and an Active Thermal Management system along with the necessary controls that significantly improves fuel efficiency for small cars. The fuel economy objective of an increase of 25% over a 2010 Chevrolet Malibu and the emission objective of EPA T2B2 compliance have been accomplished. A brief review of the program, summarized from the narrative is: The program accelerates development and synergistic integration of four cost competitive technologies to improve fuel economy of a light-duty vehicle by at least 25% while meeting Tier 2 Bin 2 emissions standards. These technologies can be broadly implemented across the U.S. light-duty vehicle product line between 2015 and 2025 and are compatible with future and renewable biofuels. The technologies in this program are: lean combustion, innovative passive selective catalyst reduction lean aftertreatment, 12V stop/start and active thermal management. The technologies will be calibrated in a 2010 Chevrolet Malibu mid-size sedan for final fuel economy demonstration.

None

2013-08-30T23:59:59.000Z

162

Midwest Motor Systems Consortium- A Unique Business Partnership  

E-Print Network [OSTI]

be more efficient because the needs of all the parties are considered from the start. A collaborative process avoids solutions that will have to be redesigned later because previously un known factors were not considered. Sweden has used collaborative... processes to solve problems in the construction industry. One example is the retrofitting of elevators in older buildings. Sweden, like the U.S., has a wowing population of older people. Many of them live on upper floors of older apartment buildings...

Hackner, R.; Cockrill, C.

163

Energy Efficient Operation of Ammonia Refrigeration Systems  

SciTech Connect (OSTI)

Ammonia refrigeration systems typically offer many energy efficiency opportunities because of their size and complexity. This paper develops a model for simulating single-stage ammonia refrigeration systems, describes common energy saving opportunities, and uses the model to quantify those opportunities. The simulation model uses data that are typically available during site visits to ammonia refrigeration plants and can be calibrated to actual consumption and performance data if available. Annual electricity consumption for a base-case ammonia refrigeration system is simulated. The model is then used to quantify energy savings for six specific energy efficiency opportunities; reduce refrigeration load, increase suction pressure, employ dual suction, decrease minimum head pressure set-point, increase evaporative condenser capacity, and reclaim heat. Methods and considerations for achieving each saving opportunity are discussed. The model captures synergistic effects that result when more than one component or parameter is changed. This methodology represents an effective method to model and quantify common energy saving opportunities in ammonia refrigeration systems. The results indicate the range of savings that might be expected from common energy efficiency opportunities.

Mohammed, Abdul Qayyum [University of Dayton, Ohio] [University of Dayton, Ohio; Wenning, Thomas J [ORNL] [ORNL; Sever, Franc [University of Dayton, Ohio] [University of Dayton, Ohio; Kissock, Professor Kelly [University of Dayton, Ohio] [University of Dayton, Ohio

2013-01-01T23:59:59.000Z

164

Energy-Efficiency Improvement Opportunities for the Textile Industry  

E-Print Network [OSTI]

efficiency improvement opportunities in electric motors in electric motors 31 When considering energy-efficiencyefficiency improvement opportunities in electric motors

Hasanbeigi, Ali

2010-01-01T23:59:59.000Z

165

Energy-Efficiency Improvement Opportunities for the Textile Industry  

E-Print Network [OSTI]

A. T. de Almeida, 2002. Energy- efficient Motor Systems: Ain the current age, as energy-efficient technologies oftenCouncil for an Energy-Efficient Economy, Washington, D.C.

Hasanbeigi, Ali

2010-01-01T23:59:59.000Z

166

IBM and Energy Efficiency: Systems Recommisiong and Optimization  

E-Print Network [OSTI]

for optimal operation ? HVAC motor fans: Vriable speed drives (VFD) installation on air supply and return fans. Humidification System OptimizationBefore After TEMP-HUM:M2:2-46-545.pv % HR HVAC:M2-RDC-PLA:VLV-HUM.pv % SPECS HUMIDIT? MINIMUM.Value Plot... instruments added to meet control requirements. PID control loop tuning was performed for optimal operation. Measures resulted in reducing the cooling and heating required for the systems as well as the electrical load on the fan motors. Some operational...

Veilleux, Y.; Boulianne, J. P.; Lefebvre, P.

2013-01-01T23:59:59.000Z

167

Research and development of energy-efficient appliance motor-compressors. Final report. Volume 1: executive summary  

SciTech Connect (OSTI)

The accomplishments of the refrigerator/freezer motor-compressor development program are highlighted. The experimental program involved making numerous incremental changes to an existing compresssor design. The refrigerator/freezer motor compressor experimental development, room air conditioner experimental development, market study, and phase II field demonstration program are summarized. (MHR)

Nelson, R.T.; MacCarthy, P.W.

1980-09-01T23:59:59.000Z

168

Emerging energy-efficient industrial technologies  

E-Print Network [OSTI]

Treatment Motor System Optimization Fuel Cells Microturbinesoptimization Advanced reciprocating engines Advanced CHP turbine systems Advanced ASD designs Compressed air system management Fuel cellsOptimization Pump Efficiency Improvement Switched Reluctance Motor Advanced Lubricants Advanced CHP Turbine Systems Advanced Reciprocating Engines Fuel Cells

2000-01-01T23:59:59.000Z

169

Comparison of energy efficiency between variable refrigerant flow systems and ground source heat pump systems  

E-Print Network [OSTI]

Comparison of energy efficiency between variable refrigeranttheir superior energy efficiency. The variable refrigerantfew studies reporting the energy efficiency of VRF systems

Hong, Tainzhen

2010-01-01T23:59:59.000Z

170

Energy Efficient Prefetching with Buffer Disks for Cluster File Systems  

E-Print Network [OSTI]

Energy Efficient Prefetching with Buffer Disks for Cluster File Systems Adam Manzanares, Xiaojun the energy- efficiency of large scale parallel storage systems. To address these issues we introduce EEVFS (Energy Efficient Virtual File System), which is able to manage data placement and disk states to help

Qin, Xiao

171

Technology and System Level Demonstration of Highly Efficient...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Merit Review 2014: Technology and System Level Demonstration of Highly Efficient and Clean, Diesel Powered Class 8 Trucks Technology and System Level Demonstration of Highly...

172

An accounting system for a Class I motor common carrier of property  

E-Print Network [OSTI]

Association discloses that of 2310 Class I carriexs nearly 1900 reported revenues far the year ended December 31, 1948, of less then ane million dollars. l Tkd, s condition suggests that if sn accounting system is to have broad ayplieatian it should... be designed to meet the requirements of eerxiers whose ennea gross revenues do nct emceed one aQLien ~. Therefore, the accounting system yresentecL herein bas been constructed for use by this class of' carriex. Motor Carriex Account Problems There are two...

Packenham, Edward S

2012-06-07T23:59:59.000Z

173

Linear motor drive system for continuous-path closed-loop position control of an object  

DOE Patents [OSTI]

A precision numerical controlled servo-positioning system is provided for continuous closed-loop position control of a machine slide or platform driven by a linear-induction motor. The system utilizes filtered velocity feedback to provide system stability required to operate with a system gain of 100 inches/minute/0.001 inch of following error. The filtered velocity feedback signal is derived from the position output signals of a laser interferometer utilized to monitor the movement of the slide. Air-bearing slides mounted to a stable support are utilized to minimize friction and small irregularities in the slideway which would tend to introduce positioning errors. A microprocessor is programmed to read command and feedback information and converts this information into the system following error signal. This error signal is summed with the negative filtered velocity feedback signal at the input of a servo amplifier whose output serves as the drive power signal to the linear motor position control coil.

Barkman, William E. (Oak Ridge, TN)

1980-01-01T23:59:59.000Z

174

Apparatus and method for controlling the rotary airlocks in a coal processing system by reversing the motor current rotating the air lock  

DOE Patents [OSTI]

An improvement to a coal processing system where hard materials found in the coal may cause jamming of either inflow or outflow rotary airlocks, each driven by a reversible motor. The instantaneous current used by the motor is continually monitored and compared to a predetermined value. If an overcurrent condition occurs, indicating a jamming of the airlock, a controller means starts a "soft" reverse rotation of the motor thereby clearing the jamming. Three patterns of the motor reversal are provided.

Groombridge, Clifton E. (Hardin, MT)

1996-01-01T23:59:59.000Z

175

Development of Bottom-up Representation of Industrial Energy Efficiency Technologies in Integrated Assessment Models for the Iron and Steel Sector  

E-Print Network [OSTI]

Energy Efficiency Improvements in Electric Motors andEnergy Efficiency Improvements in Electric Motors and

Xu, T.T.

2011-01-01T23:59:59.000Z

176

Evaluation of Hydraulic Efficiency of Disinfection Systems Based on  

E-Print Network [OSTI]

Evaluation of Hydraulic Efficiency of Disinfection Systems Based on Residence Time Distribution. Accepted November 9, 2010. Hydraulic efficiency is a vital component in evaluating the disinfection to overestimate, severely in some instances, the actual hydraulic efficiency as obtained from the system's flow

177

Energy Efficient Pump Control for an Offshore Oil Processing System  

E-Print Network [OSTI]

Energy Efficient Pump Control for an Offshore Oil Processing System Zhenyu Yang Kian Soleiman Bo, Denmark. Abstract: The energy efficient control of a pump system for an offshore oil processing system is investigated. The seawater is lifted up by a pump system which consists of three identical centrifugal pumps

Yang, Zhenyu

178

Identifying Efficiency Degrading Faults in Split Air Conditioning Systems  

E-Print Network [OSTI]

Studies estimate that as much as 50% of packaged air conditioning systems operate in faulty conditions that degrade system efficiency. Common faults include: under- and over-charged systems (too much or too little refrigerant), faulty expansions...

Terrill, T. J.; Brown, M. L.; Cheyne, R. W. Jr.; Cousins, A. J.; Daniels, B. P.; Erb, K. L.; Garcia, P. A.; Leutermann, M. J.; Nel, A. J.; Robert, C. L.; Widger, S. B.; Williams, A. G.; Rasmussen, B. P.

2013-01-01T23:59:59.000Z

179

Advanced Motors  

SciTech Connect (OSTI)

Project Summary Transportation energy usage is predicted to increase substantially by 2020. Hybrid vehicles and fuel cell powered vehicles are destined to become more prominent as fuel prices rise with the demand. Hybrid and fuel cell vehicle platforms are both dependent on high performance electric motors. Electric motors for transportation duty will require sizeable low-speed torque to accelerate the vehicle. As motor speed increases, the torque requirement decreases which results in a nearly constant power motor output. Interior permanent magnet synchronous motors (IPMSM) are well suited for this duty. , , These rotor geometries are configured in straight lines and semi circular arc shapes. These designs are of limited configurations because of the lack of availability of permanent magnets of any other shapes at present. We propose to fabricate rotors via a novel processing approach where we start with magnet powders and compact them into a net shape rotor in a single step. Using this approach, widely different rotor designs can be implemented for efficiency. The current limitation on magnet shape and thickness will be eliminated. This is accomplished by co-filling magnet and soft iron powders at specified locations in intricate shapes using specially designed dies and automatic powder filling station. The process fundamentals for accomplishing occurred under a previous Applied Technology Program titled, ???????????????垄????????????????????????????????Motors and Generators for the 21st Century???????????????垄???????????????????????????????聺. New efficient motor designs that are not currently possible (or cost prohibitive) can be accomplished by this approach. Such an approach to motor fabrication opens up a new dimension in motor design. Feasibility Results We were able to optimize a IPMSM rotor to take advantage of the powder co-filling and DMC compaction processing methods. The minimum low speed torque requirement of 5 N-m can be met through an optimized design with magnet material having a Br capability of 0.2 T. This level of magnetic performance can be met with a variety of bonded magnet compositions. The torque ripple was found to drop significantly by using thinner magnet segments. The powder co-filling and subsequent compaction processing allow for thinner magnet structures to be formed. Torque ripple can be further reduced by using skewing and pole shaping techniques. The techniques can be incorporated into the rotor during the powder co-filling process.

Knoth, Edward A.; Chelluri, Bhanumathi; Schumaker, Edward J.

2012-12-14T23:59:59.000Z

180

Multi-sensor Wireless System for Fault Detection in Induction Motors  

E-Print Network [OSTI]

be achieved with preventive maintenance through conditionAt a same time, preventive maintenance of motors helps the

Tarkesh Esfahani, Ehsan

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "motor systems efficiency" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

High Efficiency Engine Systems Development and Evaluation | Department...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

High Efficiency Engine Systems Development and Evaluation 2011 DOE Hydrogen and Fuel Cells Program, and Vehicle Technologies Program Annual Merit Review and Peer Evaluation...

182

MODELS AND METRICS FOR ENERGY-EFFICIENT COMPUTER SYSTEMS  

E-Print Network [OSTI]

MODELS AND METRICS FOR ENERGY-EFFICIENT COMPUTER SYSTEMS A DISSERTATION SUBMITTED TO THE DEPARTMENT promising energy-efficient technolo- gies, and models to understand the effects of resource utilization decisions on power con- sumption. To facilitate energy-efficiency improvements, this dissertation presents

Kozyrakis, Christos

183

CIBO's Energy Efficiency Handbook for Steam Power Systems  

E-Print Network [OSTI]

The Council of Industrial Boiler Owners (CIBO) has developed a handbook to help boiler operators get the best performance from their industrial steam systems. This energy efficiency handbook takes a comprehensive look at the boiler and steam system...

Bessette, R. D.

184

Energy efficient HVAC system features thermal storage and heat recovery  

SciTech Connect (OSTI)

This article describes a HVAC system designed to efficiently condition a medical center. The topics of the article include energy efficient design of the HVAC system, incentive rebate program by the local utility, indoor air quality, innovative design features, operations and maintenance, payback and life cycle cost analysis results, and energy consumption.

Bard, E.M. (Bard, Rao + Athanas Consulting Engineering Inc., Boston, MA (United States))

1994-03-01T23:59:59.000Z

185

Low Cost, High Efficiency Reversible Fuel Cell Systems  

E-Print Network [OSTI]

Low Cost, High Efficiency Reversible Fuel Cell Systems DE-FC36-99GO-10455 POC: Doug Hooker Dr Approach: System Concept Fuel Cell Subsystem Battery Subsystem Converter Electrolyzer Subsystem Inverter, -- (216) 541(216) 541--10001000 Slide 5 Approach: Challenges 路Electrolyzer Subsystem Efficiency 路Fuel Cell

186

High Efficiency Engine Systems Development and Evaluation  

Broader source: Energy.gov (indexed) [DOE]

Engine system modeling (GT-Power) Bottoming cycle modeling (GT-Power, Matlab) Vehicle system modeling (GT-Drive, PSAT, Autonomie) 0 20 40 60 80 Vehicle Speed,...

187

Efficiency of compressed-air systems. Final report  

SciTech Connect (OSTI)

The program undertaken by this contract is intended to quantify the current state of knowledge in American industry concerning the energy efficient design and operation of industrial compressed air systems and system components. Since there is no standard reference for designers and operators of compressed air systems which provides guidelines for maximizing the energy efficiency of these systems, a major product of this contract was the preparation of a guidebook for this purpose.

Not Available

1983-01-01T23:59:59.000Z

188

Improving Energy Efficiency of Compressed Air System Based on System Audit  

E-Print Network [OSTI]

plan, formulate energy efficiency goals and adopt energyGO-102004-1926 [3] Energy Efficiency and Market Potential ofImproving Energy Efficiency of Compressed Air System Based

Shanghai, Hongbo Qin; McKane, Aimee

2008-01-01T23:59:59.000Z

189

Energy-efficient lighting system for television  

DOE Patents [OSTI]

A light control system for a television camera comprises an artificial light control system which is cooperative with an iris control system. This artificial light control system adjusts the power to lamps illuminating the camera viewing area to provide only sufficient artificial illumination necessary to provide a sufficient video signal when the camera iris is substantially open.

Cawthorne, Duane C. (Amarillo, TX)

1987-07-21T23:59:59.000Z

190

Experimental analysis of variable capacity heat pump system equipped with vapour injection and permanent magnet motor.  

E-Print Network [OSTI]

?? This study analyzes the performance of variable capacity heat pump scroll compressor which is equipped with vapour injection and permanent magnet motor. Refrigerant used (more)

Awan, Umer Khalid

2012-01-01T23:59:59.000Z

191

High Efficiency Low Emission Refrigeration System  

Energy Savers [EERE]

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of Inspector General Office0-72.pdfGeorge Waldmann GeorgeLogging| DepartmentScience EducationHeyHigh Efficiency

192

Sustaining Operational Efficiency of a CHP System  

SciTech Connect (OSTI)

This chapter provides background information on why sustaining operations of combined cooling, heating and power systems is important, provides the algorithms for CHP system performance monitoring and commissioning verification, and concludes with a discussion on how these algorithms can be deployed.

Katipamula, Srinivas; Brambley, Michael R.

2010-01-04T23:59:59.000Z

193

Efficiencies of Solar Tracker systems with static panel Single- Axis Tracking System and Dual-Axis  

E-Print Network [OSTI]

solar tracking system for single axis as well as for dual axis. In a fixed form their efficiency is low

unknown authors

194

HVAC & Building Management Control System Energy Efficiency Replacements  

SciTech Connect (OSTI)

The project objective was the replacement of an aging, un-repairable HVAC system which has grown inefficient and a huge energy consumer with low energy and efficient HVAC units, and installation of energy efficient building control technologies at City's YMCA Community Center.

Hernandez, Adriana

2012-09-21T23:59:59.000Z

195

Improving Industrial Refrigeration System Efficiency - Actual Applications  

E-Print Network [OSTI]

cycle cooling during winter operation, compressor intercooling, direct refrigeration vs. brine cooling, insulation of cold piping to reduce heat gain, multiple screw compressors for improved part load operation, evaporative condensers for reduced system...

White, T. L.

1980-01-01T23:59:59.000Z

196

Design and global optimization of high-efficiency thermophotovoltaic systems  

E-Print Network [OSTI]

Despite their great promise, small experimental thermophotovoltaic (TPV) systems at 1000 K generally exhibit extremely low power conversion efficiencies (approximately 1%), due to heat losses such as thermal emission of ...

Bermel, Peter A.

197

Financing; A Cost Effective Alternative When Upgrading Energy Efficient Systems  

E-Print Network [OSTI]

in order to effectively compete in the marketplace. One obvious method of reducing costs and improving productivity is to upgrade old, antiquated equipment such as lighting to more modern energy efficient systems. Most projects provide a return...

Ertle, J. M.

198

Lean Gasoline System Development for Fuel Efficient Small Car...  

Broader source: Energy.gov (indexed) [DOE]

Small Car Lean Gasoline System Development for Fuel Efficient Small Car Vehicle Technologies Office Merit Review 2014: ATP-LD; Cummins Next Generation Tier 2 Bin 2 Diesel Engine...

199

Efficient Transaction Support for Dynamic Information Retrieval Systems y  

E-Print Network [OSTI]

with database management system (DBMS) features. However, initial research has revealed that DBMS features efficiency is critical in IR systems, infrastructural extensions are necessary for several DBMS features with database management system (DBMS) features [Fuh93, BCCM94, DDS + 95]. However, ini颅 tial findings have

Shenoy, Prashant

200

Improving Energy Efficiency and Security for Disk Systems  

E-Print Network [OSTI]

optimization with security services to enhance the security of energy-efficient large- scale storage systems, to conserve energy in secure storage systems. In this study we develop two ways of integrating confidentiality power consumption are crucial for large-scale data storage systems. Although a handful of studies have

Qin, Xiao

Note: This page contains sample records for the topic "motor systems efficiency" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Secure and Efficient Routable Control Systems  

SciTech Connect (OSTI)

This document provides the methods to secure routable control system communication in the electric sector. The approach of this document yields a long-term vision for a future of secure communication, while also providing near term steps and a roadmap. The requirements for the future secure control system environment were spelled out to provide a final target. Additionally a survey and evaluation of current protocols was used to determine if any existing technology could achieve this goal. In the end a four-step path was described that brought about increasing requirement completion and culminates in the realization of the long term vision.

Edgar, Thomas W.; Hadley, Mark D.; Manz, David O.; Winn, Jennifer D.

2010-05-01T23:59:59.000Z

202

Energy Efficiency in Compressed Air Systems  

E-Print Network [OSTI]

Energy use in compressed air systems accounts for typically 10% of the total industrial electricity consumption. It also accounts for close to 99% of the CO2 footprint of an air compressor and approximately 80% of the life cycle costs of a...

Hingorani, A.; Pavlov, A.

2010-01-01T23:59:59.000Z

203

Energy Efficiency of Distributed Environmental Control Systems  

SciTech Connect (OSTI)

In this report, we present an analytical evaluation of the potential of occupant-regulated distributed environmental control systems (DECS) to enhance individual occupant thermal comfort in an office building with no increase, and possibly even a decrease in annual energy consumption. To this end we developed and applied several analytical models that allowed us to optimize comfort and energy consumption in partitioned office buildings equipped with either conventional central HVAC systems or occupant-regulated DECS. Our approach involved the following interrelated components: 1. Development of a simplified lumped-parameter thermal circuit model to compute the annual energy consumption. This was necessitated by the need to perform tens of thousands of optimization calculations involving different US climatic regions, and different occupant thermal preferences of a population of ~50 office occupants. Yearly transient simulations using TRNSYS, a time-dependent building energy modeling program, were run to determine the robustness of the simplified approach against time-dependent simulations. The simplified model predicts yearly energy consumption within approximately 0.6% of an equivalent transient simulation. Simulations of building energy usage were run for a wide variety of climatic regions and control scenarios, including traditional 搊ne-size-fits-all (OSFA) control; providing a uniform temperature to the entire building, and occupant-selected 揾ave-it-your-way (HIYW) control with a thermostat at each workstation. The thermal model shows that, un-optimized, DECS would lead to an increase in building energy consumption between 3-16% compared to the conventional approach depending on the climate regional and personal preferences of building occupants. Variations in building shape had little impact in the relative energy usage. 2. Development of a gradient-based optimization method to minimize energy consumption of DECS while keeping each occupant抯 thermal dissatisfaction below a given threshold. The DECS energy usage was calculated using the simplified thermal model. OSFA control; providing a uniform temperature to the entire building, and occupant-selected HIYW control with a thermostat at each workstation were implemented for 3 cities representing 3 different climatic regions and control scenarios. It is shown that optimization allows DECS to deliver a higher level of individual and population thermal comfort while achieving annual energy savings between 14 and 26% compared to OSFA. The optimization model also allowed us to study the influence of the partitions thermal resistance and the variability of internal loads at each office. These influences didn抰 make significant changes in the optimized energy consumption relative to OSFA. The results show that it is possible to provide thermal comfort for each occupant while saving energy compared to OSFA Furthermore, to simplify the implementation of this approach, a fuzzy logic system has been developed to generalize the overall optimization strategy. Its performance was almost as good as the gradient system. The fuzzy system provided thermal comfort to each occupant and saved energy compared to OSFA. The energy savings of the fuzzy system were not as high as for the gradient-optimized system, but the fuzzy system avoided complete connectivity, and the optimization did not have to be repeated for each population. 3. We employed a detailed CFD model of adjacent occupied cubicles to extend the thermal-circuit model in three significant ways: (a) relax the 搊ffice wall requirement by allowing energy to flow between zones via advection as well as conduction, (b) improve the comfort model to account both for radiation as well as convection heat transfer, and (c) support ventilation systems in which the temperature is stratified, such as in underfloor air distribution systems. Initially, three-dimensional CFD simulations of several cubicle configurations, with an adjoining corridor, were performed both to understand the advection between cubicles and the

Khalifa, H. Ezzat; Isik, Can; Dannenhoffer, John F. III

2011-02-23T23:59:59.000Z

204

INTEGRATED ENERGY EFFICIENT WINDOW-WALL SYSTEMS  

SciTech Connect (OSTI)

The building industry faces the challenge of reducing energy use while simultaneously improving construction methods and marketability. This paper describes the first phase of a project to address these concerns by designing an Integrated Window Wall System (IWWS) that can be commercialized. This work builds on previous research conducted during the 1990's by Lawrence Berkeley national Laboratories (LBNL). During this phase, the objective was to identify appropriate technologies, problems and issues and develop a number of design concepts. Four design concepts were developed into prototypes and preliminary energy analyses were conducted Three of these concepts (the foam wall, steel wall, and stiffened plate designs) showed particular potential for meeting the project objectives and will be continued into a second phase where one or two of the systems will be brought closer to commercialization.

Michael Arney, Ph.D.

2002-12-31T23:59:59.000Z

205

IMPROVING ENERGY EFFICIENCY AND REDUCING COSTS IN THE DRINKING WATER SUPPLY INDUSTRY: An ENERGY STAR Resource Guide for Energy and Plant Managers  

E-Print Network [OSTI]

American Council for an Energy Efficient Economy (ACEEE).and S. Nadel. 2002. Energy-Efficient Motor Systems: ACouncil for an Energy-Efficient Economy. Washington, D.C.

Brown, Moya Melody, Camilla Dunham Whitehead, Rich

2011-01-01T23:59:59.000Z

206

Permanent magnet assisted synchronous reluctance motor, design and performance improvement  

E-Print Network [OSTI]

Recently, permanent magnet assisted (PMa)-synchronous reluctance motors (SynRM) have been considered as a possible alternative motor drive for high performance applications. In order to have an efficient motor drive, performing of three steps...

Niazi, Peyman

2006-04-12T23:59:59.000Z

207

Research and development of energy-efficient appliance motor-compressors. Volume IV. Production demonstration and field test  

SciTech Connect (OSTI)

Two models of a high-efficiency compressor were manufactured in a pilot production run. These compressors were for low back-pressure applications. While based on a production compressor, there were many changes that required production process changes. Some changes were performed within our company and others were made by outside vendors. The compressors were used in top mount refrigerator-freezers and sold in normal distribution channels. Forty units were placed in residences for a one-year field test. Additional compressors were built so that a life test program could be performed. The results of the field test reveal a 27.0% improvement in energy consumption for the 18 ft/sup 3/ high-efficiency model and a 15.6% improvement in the 21 ft/sup 3/ improvement in the 21 ft/sup 3/ high-efficiency model as compared to the standard production unit.

Middleton, M.G.; Sauber, R.S.

1983-09-01T23:59:59.000Z

208

Structural and functional adaptations of the Auditory-Motor System : insights from expertise & disorder  

E-Print Network [OSTI]

While evidence from clinical and functional neuroimaging domains converges on a notion that auditory-motor networks can be remodeled functionally and structurally in response to experiences, studies that seek to evaluate ...

Halwani, Gus F. (Gus Fizt)

2012-01-01T23:59:59.000Z

209

the 4th Power Electronics, Drive Systems & Technologies Conference, PEDSTC 2013 Simultaneous Sensing cum Actuating Linear Motor  

E-Print Network [OSTI]

of an electric machine (a linear motor) without using conventional sensors. Tested is a back-drivable linear motor stage which uses the linear motor electric machine as simultaneous sensor cum actuator, and mechanical impedance of the motor by measuring the motor's time variant electrical impedance. The method

Paris-Sud XI, Universit茅 de

210

Energy Efficiency Improvement and Cost Saving Opportunities for the U.S. Iron and Steel Industry An ENERGY STAR(R) Guide for Energy and Plant Managers  

E-Print Network [OSTI]

The NEMA Premium Efficiency Electric Motor specification wasEnergy Efficiency Improvements in Electric Motors andRewinding on Motor Efficiency. Electric Apparatus Service

Worrell, Ernst

2011-01-01T23:59:59.000Z

211

IMPROVING ENERGY EFFICIENCY AND REDUCING COSTS IN THE DRINKING WATER SUPPLY INDUSTRY: An ENERGY STAR Resource Guide for Energy and Plant Managers  

E-Print Network [OSTI]

Determining Electric Motor Load and Efficiency. Among theEnergy Efficiency Alliance, Electric Motor Management. 2001.Energy Efficiency Alliance, Electric Motor Management. 2001.

Brown, Moya Melody, Camilla Dunham Whitehead, Rich

2011-01-01T23:59:59.000Z

212

Energy efficiency in wireless communication systems  

DOE Patents [OSTI]

Wireless communication systems and methods utilize one or more remote terminals, one or more base terminals, and a communication channel between the remote terminal(s) and base terminal(s). The remote terminal applies a direct sequence spreading code to a data signal at a spreading factor to provide a direct sequence spread spectrum (DSSS) signal. The DSSS signal is transmitted over the communication channel to the base terminal which can be configured to despread the received DSSS signal by a spreading factor matching the spreading factor utilized to spread the data signal. The remote terminal and base terminal can dynamically vary the matching spreading factors to adjust the data rate based on an estimation of operating quality over time between the remote terminal and base terminal such that the amount of data being transmitted is substantially maximized while providing a specified quality of service.

Caffrey, Michael Paul; Palmer, Joseph McRae

2012-12-11T23:59:59.000Z

213

OPTIMAL EFFICIENCY-POWER TRADEOFF FOR AN AIR MOTOR/COMPRESSOR WITH VOLUME VARYING HEAT TRANSFER CAPABILITY  

E-Print Network [OSTI]

of air. These results could ben- efit applications such as compressed air energy storage where both high and expansion is both energy efficient and power-dense. An ex- ample would be compressed air energy storage. One density of compressed air storage (about 20 times greater than hydraulic accumulators), and the high power

Li, Perry Y.

214

Microcomputer-based information feedback system for improving tractor efficiency  

E-Print Network [OSTI]

) used a gear oontrol system based on a customized version of the Motorola 6800 microprocessor. When used with heavy duty automatic transmissions in trucks and off highway equipment, improvements were seen in fuel efficiency, performanoe, reliability... in oil prices over the past deoade sparked more interest in determining tractor efficiency and in exploring ways to improve fuel economy. During the same time period, explosive growth in the eleotronics industry has made available very compact...

Grogan, Joseph

1985-01-01T23:59:59.000Z

215

A High Efficiency PSOFC/ATS-Gas Turbine Power System  

SciTech Connect (OSTI)

A study is described in which the conceptual design of a hybrid power system integrating a pressurized Siemens Westinghouse solid oxide fuel cell generator and the Mercury{trademark} 50 gas turbine was developed. The Mercury{trademark} 50 was designed by Solar Turbines as part of the US. Department of Energy Advanced Turbine Systems program. The focus of the study was to develop the hybrid power system concept that principally would exhibit an attractively-low cost of electricity (COE). The inherently-high efficiency of the hybrid cycle contributes directly to achieving this objective, and by employing the efficient, power-intensive Mercury{trademark} 50, with its relatively-low installed cost, the higher-cost SOFC generator can be optimally sized such that the minimum-COE objective is achieved. The system cycle is described, major system components are specified, the system installed cost and COE are estimated, and the physical arrangement of the major system components is discussed. Estimates of system power output, efficiency, and emissions at the system design point are also presented. In addition, two bottoming cycle options are described, and estimates of their effects on overall-system performance, cost, and COE are provided.

W.L. Lundberg; G.A. Israelson; M.D. Moeckel; S.E. Veyo; R.A. Holmes; P.R. Zafred; J.E. King; R.E. Kothmann

2001-02-01T23:59:59.000Z

216

Energy Efficiency and Environmental Impact Analyses of Supermarket Refrigeration Systems  

SciTech Connect (OSTI)

This paper presents energy and life cycle climate performance (LCCP) analyses of a variety of supermarket refrigeration systems to identify designs that exhibit low environmental impact and high energy efficiency. EnergyPlus was used to model refrigeration systems in a variety of climate zones across the United States. The refrigeration systems that were modeled include the traditional multiplex DX system, cascade systems with secondary loops and the transcritical CO2 system. Furthermore, a variety of refrigerants were investigated, including R-32, R-134a, R-404A, R-1234yf, R-717, and R-744. LCCP analysis was used to determine the direct and indirect carbon dioxide emissions resulting from the operation of the various refrigeration systems over their lifetimes. Our analysis revealed that high-efficiency supermarket refrigeration systems may result in up to 44% less energy consumption and 78% reduced carbon dioxide emissions compared to the baseline multiplex DX system. This is an encouraging result for legislators, policy makers and supermarket owners to select low emission, high-efficiency commercial refrigeration system designs for future retrofit and new projects.

Fricke, Brian A [ORNL] [ORNL; Bansal, Pradeep [ORNL] [ORNL; Zha, Shitong [Hillphoenix] [Hillphoenix

2013-01-01T23:59:59.000Z

217

Research and development of energy-efficient appliance motor-compressors. Final report. Volume II: market evaluation  

SciTech Connect (OSTI)

An exploratory experiment asked consumers to verbalize how they chose among a set of hypothetical refrigerators with different initial prices and operating costs. From these verbalizations it was determined that many consumers used a payback criterion whereby they would choose the energy efficient appliance if the increase in initial price was recouped in future operating cost savings within an acceptable period of time. This acceptable period of time is called a payback period. Based on these preliminary results, a field study of 337 respndents was undertaken to estimate the distribution of acceptable payback periods for two energy consuming appliances, air conditioners and refrigerator-freezers. The payback distributions were then used to estimte the percent of consumers (i.e., market shares) who would select the energy efficient appliances for a range of price increases and operating cost savings. Following the field study, 123 consumers participated in a simulated shopping experiment to (a) see if the results of the field survey would hold in a more realistic shopping environment and (b) determine the effects of several market variables on the demand for energy efficiency.

Staelin, R.; Redinger, R.P.

1980-12-01T23:59:59.000Z

218

A MultiAir / MultiFuel Approach to Enhancing Engine System Efficiency...  

Broader source: Energy.gov (indexed) [DOE]

to Enhancing Engine System Efficiency A MultiAir MultiFuel Approach to Enhancing Engine System Efficiency 2012 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies...

219

Electric motors: Markets, trends, and applications  

SciTech Connect (OSTI)

Electric motors play an important role in nearly all sectors of the US economy. Typical motor applications range from air conditioning and appliances in the residential sector, to cooling and space heating in the commercial sector, to materials handling and processing in the industrial sectors. Motors in the residential sector consumed nearly 352 billion kilowatthours (BkWh) in 1985, in the commercial sector 279 BkWh, and the industrial sector 552 BkWh. Approximately 87% of electric motor electricity use in the industrial sector was consumed in manufacturing processes, while the process industries consumed more than half of the manufacturing sector's electric motor electricity use. The total motor population in all sectors in 1987 stood just shy of 1.02 billion, 90% of which are less than one horsepower (HP) in size. An increasing percentage of the motor population is comprised of high efficiency motors, as classified by the National Electrical Manufacturers Association (NEMA). High efficiency motors offer end-users greater energy and cost savings than do their standard efficiency counterparts. This report provides an overview of the history of the electric motor, a brief description of the electromechanical theory behind motor operations, and offers a statistical review of the size and distribution of the electric motor market. The report also presents data on sector motor electricity use, describes current and potential motor application opportunities, and details areas in which further research and development may be needed.

Not Available

1992-06-01T23:59:59.000Z

220

Energy Efficient Deadline Scheduling in Two Processor Systems  

E-Print Network [OSTI]

Energy Efficient Deadline Scheduling in Two Processor Systems Tak-Wah Lam1 , Lap-Kei Lee1 , Isaac K manage its energy usage by scaling dynamically its speed. In this paper we attempt to extend such work energy. The motivation comes from the fact that dual-core processors are get- ting common nowadays. Our

Wong, Prudence W.H.

Note: This page contains sample records for the topic "motor systems efficiency" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

NREL showcase solar systems and energy efficient design  

SciTech Connect (OSTI)

THe Thermal Test Facility at NREL, which should be completed in the summer of 1996, will incorporate natural lighting from clerestories and may other solar and energy-efficiency features; roof-mounted solar collectors, which will be monitored as part of NREL`s work on active solar systems, will help to heat water and interior spaces in the building.

NONE

1995-12-31T23:59:59.000Z

222

Improving Energy Efficiency for Energy Harvesting Embedded Systems*  

E-Print Network [OSTI]

of solar energy. The main control knobs in these problems are the voltage of charge transfer interconnect of charge migration problem [6] is to transfer energy internally from one EES bank to another, whileImproving Energy Efficiency for Energy Harvesting Embedded Systems* Yang Ge, Yukan Zhang and Qinru

Qiu, Qinru

223

Efficient Low Complexity Power Allocation Policies for Wireless Communication Systems  

E-Print Network [OSTI]

. Other benefits will be smaller diesel generators and batteries with longer life time. Thus, one of the primary challenges for Next Generation Networks (NGN) is to reduce energy consumption. In a BS the powerEfficient Low Complexity Power Allocation Policies for Wireless Communication Systems Guaranteeing

Sharma, Vinod

224

LOW COST, HIGH EFFICIENCY REVERSIBLE FUEL CELL SYSTEMS  

E-Print Network [OSTI]

common hydrocarbon fuels (e.g., natural gas, propane, and bio-derived fuel) as well as hydrogenLOW COST, HIGH EFFICIENCY REVERSIBLE FUEL CELL SYSTEMS Dr. Christopher E. Milliken, Materials Group Boulevard Cleveland, Ohio 44108 216-541-1000 Abstract Fuel cell technologies are described in the 2001 DOE

225

Distributed Power Delivery for Energy Efficient and Low Power Systems  

E-Print Network [OSTI]

Distributed Power Delivery for Energy Efficient and Low Power Systems Selc赂uk K篓ose Department are needed to determine the location of these on-chip power supplies and decoupling capacitors. In this paper, the optimal location of the power supplies and decoupling capacitors is determined for different size

Friedman, Eby G.

226

Efficient Symbolic Detection of Global Properties in Distributed Systems  

E-Print Network [OSTI]

to total orders containing the happened颅before relation. A consistent global state (CGS) of a computation cEfficient Symbolic Detection of Global Properties in Distributed Systems Scott D. Stoller a global state satisfying property \\Phi. Previous general颅purpose algorithms for this problem explicitly

Stoller, Scott

227

cs281: Introduction to Computer Systems Lab08 Interrupt Handling and Stepper Motor Controller  

E-Print Network [OSTI]

Overview The objective of this lab is to introduce ourselves to the Arduino interrupt capabilities and to use them to build a stepper motor controller. The interrupt handler will allow the Arduino allows the Arduino to monitor and respond to its external environment even while already performing

Kretchmar, R. Matthew

228

Biological optimization systems for enhancing photosynthetic efficiency and methods of use  

DOE Patents [OSTI]

The present disclosure relates to biological optimization systems for enhancing photosynthetic efficiency and methods of use.

Hunt, Ryan W; Chinnasamy, Senthil; Das, Keshav C; Rolim de Mattos, Erico

2014-02-25T23:59:59.000Z

229

Index to Evaluate Energy Efficiency of the Building HVAC System  

E-Print Network [OSTI]

1An Index to Evaluate Energy Efficiency of the Entire Building HVAC System Presented by Dr. Claridge Date: 09/15/2014 ESL-IC-14-09-15 Proceedings of the 14th International Conference for Enhanced Building Operations, Beijing, China, September 14..., Beijing, China, September 14-17, 2014 3 Why we need the Energy/Load Ratio 1. Building 2. HVAC Systems 3. Common Index Building sector consumes 40% of total energy usage in US (Residential buildings 22%, Commercial building 19%) HVAC systems...

Wang, L.; Wang, L.; Claridge,D.

2014-01-01T23:59:59.000Z

230

Energy-Efficient Building HVAC Control Using Hybrid System LBMPC  

E-Print Network [OSTI]

Improving the energy-efficiency of heating, ventilation, and air-conditioning (HVAC) systems has the potential to realize large economic and societal benefits. This paper concerns the system identification of a hybrid system model of a building-wide HVAC system and its subsequent control using a hybrid system formulation of learning-based model predictive control (LBMPC). Here, the learning refers to model updates to the hybrid system model that incorporate the heating effects due to occupancy, solar effects, outside air temperature (OAT), and equipment, in addition to integrator dynamics inherently present in low-level control. Though we make significant modeling simplifications, our corresponding controller that uses this model is able to experimentally achieve a large reduction in energy usage without any degradations in occupant comfort. It is in this way that we justify the modeling simplifications that we have made. We conclude by presenting results from experiments on our building HVAC testbed, which s...

Aswani, Anil; Taneja, Jay; Krioukov, Andrew; Culler, David; Tomlin, Claire

2012-01-01T23:59:59.000Z

231

Catalog of DC Appliances and Power Systems  

E-Print Network [OSTI]

Sectors with High- Efficiency Electric Motors, Final Report,of the far greater efficiency of electric motors compared to

Garbesi, Karina

2012-01-01T23:59:59.000Z

232

Super efficient refrigeration systems: Two non-CFC designs ready for commercialization  

SciTech Connect (OSTI)

Two high-efficiency prime movers for refrigeration are ready for field testing and commercialization. Either machine, combined with other advanced measures, could result in a CFC-free refrigerator using significantly less energy than units meeting the 1993 US efficiency standards. The first design is a linear motor/compressor that manufacturers could substitute for the standard rotating motor/compressor in a conventional refrigerator. The second design is a Stirling-cycle refrigeration machine that is self contained and uses helium gas as the working fluid. The results of prototype testing, the inherent simplicity of both machines, and their virtually frictionless operation point to economical and reliable service. If these features are confirmed in further testing now being conducted by appliance and compressor manufacturers, these machines will be strong candidates for inclusion in super efficient refrigerator designs over the next few years.

Stickney, B.L.

1992-12-31T23:59:59.000Z

233

Implementation and Rejection of Industrial Steam System Energy Efficiency Measures  

SciTech Connect (OSTI)

Steam systems consume approximately one third of energy applied at U.S. industrial facilities. To reduce energy consumption, steam system energy assessments have been conducted on a wide range of industry types over the course of five years through the Energy Savings Assessment (ESA) program administered by the U.S. Department of Energy (U.S. DOE). ESA energy assessments result in energy efficiency measure recommendations that are given potential energy and energy cost savings and potential implementation cost values. Saving and cost metrics that measure the impact recommended measures will have at facilities, described as percentages of facility baseline energy and energy cost, are developed from ESA data and used in analyses. Developed savings and cost metrics are examined along with implementation and rejection rates of recommended steam system energy efficiency measures. Based on analyses, implementation of steam system energy efficiency measures is driven primarily by cost metrics: payback period and measure implementation cost as a percentage of facility baseline energy cost (implementation cost percentage). Stated reasons for rejecting recommended measures are primarily based upon economic concerns. Additionally, implementation rates of measures are not only functions of savings and cost metrics, but time as well.

Therkelesen, Peter; McKane, Aimee

2013-05-01T23:59:59.000Z

234

A Novel Approach to Determining Motor Load  

E-Print Network [OSTI]

A NOVEL APPROACH TO DETERMINING MOTOR LOAD by Michael Brown Georgia Tech Research Institute Atlanta, Georgia ABSTRACf Properly sized electric motors are essential if industrial plant efficiency is to be optimized and energy costs... minimized. Because of the difficully in making power measurements on three phase motors, loading is rarely, if ever, checked. A simple indication of motor load can be achieved by measuring operating speed because speed and load are almost linearly...

Brown, M.

235

Integration of High Efficiency Solar Cells on Carriers for Concentrating System Applications .  

E-Print Network [OSTI]

??High efficiency multi-junction (MJ) solar cells were packaged onto receiver systems. The efficiency change of concentrator cells under continuous high intensity illumination was done. Also, (more)

Chow, Simon Ka Ming

2011-01-01T23:59:59.000Z

236

An Energy-Efficient Framework for Large-Scale Parallel Storage Systems  

E-Print Network [OSTI]

An Energy-Efficient Framework for Large-Scale Parallel Storage Systems Ziliang Zong, Matt Briggs-scale and energy-efficient parallel storage systems. To validate the efficiency of the proposed framework, a buffer that this new framework can significantly improves the energy efficiency of large-scale parallel storage systems

Qin, Xiao

237

CPT: An Energy-Efficiency Model for Multi-core Computer Systems  

E-Print Network [OSTI]

CPT: An Energy-Efficiency Model for Multi-core Computer Systems Weisong Shi, Shinan Wang and Bing efficiency of computer systems. These techniques affect the energy efficiency across different layers metric that represents the energy efficiency of a computer system, for a specific configuration, given

Shi, Weisong

238

Efficient Bulk Data Replication for the Earth System Grid  

SciTech Connect (OSTI)

The Earth System Grid (ESG) community faces the difficult challenge of managing the distribution of massive data sets to thousands of scientists around the world. To move data replicas efficiently, the ESG has developed a data transfer management tool called the Bulk Data Mover (BDM). We describe the performance results of the current system and plans towards extending the techniques developed so far for the up- coming project, in which the ESG will employ advanced networks to move multi-TB datasets with the ulti- mate goal of helping researchers understand climate change and its potential impacts on world ecology and society.

Sim, Alex; Gunter, Dan; Natarajan, Vijaya; Shoshani, Arie; Williams, Dean; Long, Jeff; Hick, Jason; Lee, Jason; Dart, Eli

2010-03-10T23:59:59.000Z

239

Advanced Electric Systems and Aerodynamics for Efficiency Improvements in Heavy Duty Trucks  

SciTech Connect (OSTI)

The Advanced Electric Systems and Aerodynamics for Efficiency Improvements in Heavy Duty Trucks program (DE-FC26-04NT42189), commonly referred to as the AES program, focused on areas that will primarily benefit fuel economy and improve heat rejection while driving over the road. The AES program objectives were to: (1) Analyze, design, build, and test a cooling system that provided a minimum of 10 percent greater heat rejection in the same frontal area with no increase in parasitic fan load. (2) Realize fuel savings with advanced power management and acceleration assist by utilizing an integrated starter/generator (ISG) and energy storage devices. (3) Quantify the effect of aerodynamic drag due to the frontal shape mandated by the area required for the cooling system. The program effort consisted of modeling and designing components for optimum fuel efficiency, completing fabrication of necessary components, integrating these components into the chassis test bed, completing controls programming, and performance testing the system both on a chassis dynamometer and on the road. Emission control measures for heavy-duty engines have resulted in increased engine heat loads, thus introducing added parasitic engine cooling loads. Truck electrification, in the form of thermal management, offers technological solutions to mitigate or even neutralize the effects of this trend. Thermal control offers opportunities to avoid increases in cooling system frontal area and forestall reduced fuel economy brought about by additional aerodynamic vehicle drag. This project explored such thermal concepts by installing a 2007 engine that is compliant with current regulations and bears additional heat rejection associated with meeting these regulations. This newer engine replaced the 2002 engine from a previous project that generated less heat rejection. Advanced power management, utilizing a continuously optimized and controlled power flow between electric components, can offer additional fuel economy benefits to the heavy-duty trucking industry. Control software for power management brings added value to the power distribution and energy storage architecture on board a truck with electric accessories and an ISG. The research team has built upon a previous truck electrification project, formally, 'Parasitic Energy Loss Reduction and Enabling Technologies for Class 7/8 Trucks', DE-FC04-2000AL6701, where the fundamental concept of electrically-driven accessories replacing belt/gear-driven accessories was demonstrated on a Kenworth T2000 truck chassis. The electrical accessories, shown in Figure 1, were controlled to provide 'flow on demand' variable-speed operation and reduced parasitic engine loads for increased fuel economy. These accessories also provided solutions for main engine idle reduction in long haul trucks. The components and systems of the current project have been integrated into the same Kenworth T2000 truck platform. Reducing parasitic engine loading by decoupling accessory loads from the engine and driving them electrically has been a central concept of this project. Belt or gear-driven engine accessories, such as water pump, air conditioning compressor, or air compressor, are necessarily tied to the engine speed dictated by the current vehicle operating conditions. These conventional accessory pumps are sized to provide adequate flow or pressure at low idle or peak torque speeds, resulting in excess flow or pressure at cruising or rated speeds. The excess flow is diverted through a pressure-minimizing device such as a relief valve thereby expending energy to drive unnecessary and inefficient pump operation. This inefficiency causes an increased parasitic load to the engine, which leads to a loss of usable output power and decreased fuel economy. Controlling variable-speed electric motors to provide only the required flow or pressure of a particular accessory system can yield significant increases in fuel economy for a commercial vehicle. Motor loads at relatively high power levels (1-5 kW, or higher) can be efficiently provided

Larry Slone; Jeffrey Birkel

2007-10-31T23:59:59.000Z

240

3D stepper motor system and its GUI A report for project-in-lieu-of-thesis  

E-Print Network [OSTI]

-reluctance step motor 10 2.2 Permanent-magnet step motor 11 2.3 Hybrid step motor 12 3 GUI design essentials 13 4. In this experiment, the rotary axis is controlled to conduct 180 degree half circle motion with a 4.5 foot long shaft

Abidi, Mongi A.

Note: This page contains sample records for the topic "motor systems efficiency" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

Energy efficiency in public buildings through ICT based control and monitoring systems  

E-Print Network [OSTI]

Energy efficiency in public buildings through ICT based control and monitoring systems G, France Keywords: energy efficiency, existing public buildings, control strategies, dynamic simulations a project entitled "Smart Energy Efficient Middleware for Public Spaces" (SEEMPubS). The project addresses

Paris-Sud XI, Universit茅 de

242

Conducting a Motor Survey: Key Step for Establishing a Motor Management Policy  

E-Print Network [OSTI]

Roughly 70% of the energy consumed by manufacturing processes is used by electric motors. According to the U.S. Department of Energy, greater attention to motor systems management can reduce motor-related energy costs by 18%. Establishing a motor...

Miller, R. B.

243

Analysis of Energy-Efficiency Opportunities for the Cement Industry in Shandong Province, China  

E-Print Network [OSTI]

Energy-efficiency standards for electric motors in Brazilianefficiency motors are included since there are around 500 700 electric

Price, Lynn

2010-01-01T23:59:59.000Z

244

Measure it, See it, Manage it: Using Real Time Data to Benchmark,Optimize, and Sustain System Energy Efficiency  

SciTech Connect (OSTI)

Even after years of training and awareness building at thestate and national level, industrial cross-cutting systems (motor-driven,steam, process heating) continue to offer significant opportunities forenergy savings. The US Department of Energy estimates these remainingsavings at more than 7 percent of all industrial energy use. This paperpresents a different approach to promoting industrial system energyefficiency -- providing plant personnel with ready access to data uponwhich to base energy management decisions.In 2005, a Del Monte Foodsfruit processing plant in Modesto, California worked with LawrenceBerkeley National Laboratory (LBNL)to specify and purchase permanentinstrumentation for monitoring their compressed air system. This work,completed as part of a demonstration project under a State TechnologiesAdvancement Collaborative (STAC) grant, was designed to demonstrate theeffectiveness of enterprise energy management (EEM), which is predicatedon the assumption that the energy efficiency of existing, cross-cuttingindustrial systems (motor-driven, steam) can be improved by providingmanagement and operating personnel with real-time data on energy use. Theinitial STAC grant provided for the installation and some initialanalyses, but did not address the larger issue of integrating these newdata into an ongoing energy management program for the compressed airsystem.The California Energy Commission (CEC) decided to support furtheranalysis to identify potential for air system optimization. Through theCEC's Energy in Agriculture Program, a compressed air system audit wasperformed by Tom Taranto to: Measure and document the system's baselineand CASE Index of present operation; Establish methods to sustain anongoing CASE Index measure of performance; Use AIRMaster+ to analyzesupply side performance as compared to the CASE Index; Identify demandside opportunities for efficiency and performance improvement; Assesssupply / demand balance and energy reduction opportunities; Evaluate thepresent air compressor control strategy and potential improvement, andCollect data to benchmark parameters for compressed air systems atsimilar facilities.This paper addresses the benefits and limitations ofboth continuous and targeted measurement in benchmarking, optimizing, andsustaining an efficient compressed air system. Included are methods usedin applying both of these measurements to a complex industrial system.Further, this paper will describe the results of these additionalanalyses and the plant response to them.

Taranto, Thomas; McKane, Aimee; Amon, Ricardo; Maulhardt, Michael

2007-07-02T23:59:59.000Z

245

Proper design hikes gas-lift system efficiency  

SciTech Connect (OSTI)

Proper design of gas-lift pumping systems, used for pumping corrosive or erosive fluids, involves the correct selection of submergence ratio, flow regime, pipe diameter, and physical properties of the fluid. Correlations for maximum lifting efficiency on a friction-free basis vs. submergence ratio have been developed based on experimental data. The Oshinowo and Charles flow map for vertical upward flow has been chosen for determining the two-phase flow regimes. For large-diameter gas-lifting systems, the effects of fluid physical properties on the maximum lifting efficiency become diminished. Gas-lift pumping systems are widely used in the process industry as well as in oil and gas production. In an ethylene dichloride/vinyl chloride monomer (EDC/VCM) plant, quench column bottoms are recirculated back to the column by gas lift of the EDC/VCM stream from the EDC pyrolysis furnace. Gas lift is utilized instead of pumps to alleviate the plugging and erosion problems caused by the presence of coke/tar particulates. Other process applications include those where pumps suffer severe corrosion from the fluids pumped.

Tsai, T.C.

1986-06-30T23:59:59.000Z

246

Efficient energy transfer in light-harvesting systems, I: optimal temperature, reorganization energy, and spatial-  

E-Print Network [OSTI]

Efficient energy transfer in light-harvesting systems, I: optimal temperature, reorganization of efficient and robust energy transfer in light-harvesting systems provides new insights for the optimal the efficiency and maintain its stability. With the Haken-Strobl model, the maximal energy transfer efficiency

Cao, Jianshu

247

Wind motor applications for transportation  

SciTech Connect (OSTI)

Motion equation for a vehicle equipped with a wind motor allows, taking into account the drag coefficients, to determine the optimal wind drag velocity in the wind motor`s plane, and hence, obtain all the necessary data for the wind wheel blades geometrical parameters definition. This optimal drag velocity significantly differs from the flow drag velocity which determines the maximum wind motor power. Solution of the motion equation with low drag coefficients indicates that the vehicle speed against the wind may be twice as the wind speed. One of possible transportation wind motor applications is its use on various ships. A ship with such a wind motor may be substantially easier to steer, and if certain devices are available, may proceed in autonomous control mode. Besides, it is capable of moving within narrow fairways. The cruise speed of a sailing boat and wind-motored ship were compared provided that the wind velocity direction changes along a harmonic law with regard to the motion direction. Mean dimensionless speed of the wind-motored ship appears to be by 20--25% higher than that of a sailing boat. There was analyzed a possibility of using the wind motors on planet rovers in Mars or Venus atmospheric conditions. A Mars rover power and motor system has been assessed for the power level of 3 kW.

Lysenko, G.P.; Grigoriev, B.V.; Karpin, K.B. [Moscow Aviation Inst. (Russian Federation)

1996-12-31T23:59:59.000Z

248

Energy Efficiency in Heavy Vehicle Tires, Drivetrains, and Braking Systems  

SciTech Connect (OSTI)

This document was prepared to support the primary goals of the Department of Energy, Office of Heavy Vehicle Technologies. These were recently stated as follows: ''Develop by 2004 the enabling technologies for a class 7-8 truck with a fuel efficiency of 10 mpg (at 65 mph) which will meet prevailing emission standards. For Class 3-6 trucks operating on an urban driving cycle, develop by 2004 commercially viable vehicles that achieve at least double the fuel economy of comparable current vehicles (1999), and as a research goal, reduce criteria pollutants to 30% below EPA standards. Develop by 2004 the diesel engine enabling technologies to support large-scale industry dieselization of Class 1 and 2 trucks, achieving a 35 % fuel efficiency improvement over comparable gasoline-fueled trucks, while meeting applicable emissions standards.'' The enabling technologies for improving the fuel efficiency of trucks, include not only engine technologies but also technologies involved with lowering the rolling resistance of tires, reducing vehicle aerodynamic drag, improving thermal management, and reducing parasitic frictional losses in drive train components. Opportunities also exist for making better use of the energy that might ordinarily be dissipated during vehicle braking. Braking systems must be included in this evaluation since safety in truck operations is vital, and braking requirements are greater for vehicles having lowered resistance to rolling. The Office of Heavy Vehicle Technologies has initiated a program to improve the aerodynamics of heavy vehicles through wind tunnel testing, computational modeling, and on-road evaluations. That activity is described in a separate multi-year plan; therefore, emphasis in this document will be on tires, drive trains, and braking systems. Recent, dramatic fluctuations in diesel fuel prices have emphasized the importance of effecting savings in truck fuel economy by implementing new component designs and materials.

Peter J. Blau

2000-04-26T23:59:59.000Z

249

Frequency modulation drive for a piezoelectric motor  

DOE Patents [OSTI]

A piezoelectric motor has peak performance at a specific frequency f.sub.1 that may vary over a range of frequencies. A drive system is disclosed for operating such a motor at peak performance without feedback. The drive system consists of the motor and an ac source connected to power the motor, the ac source repeatedly generating a frequency over a range from f.sub.1 -.DELTA.x to f.sub.1 +.DELTA.y.

Mittas, Anthony (Albuquerque, NM)

2001-01-01T23:59:59.000Z

250

Bottom-Up Energy Analysis System - Methodology and Results  

E-Print Network [OSTI]

Energy-Efficiency Standards for Electric Motors in Brazilianefficiency definitions Product class market shares Industrial electric motorsMotor Efficiency Standards - SEEEM Harmonization Initiative. in IEA Electric

McNeil, Michael A.

2013-01-01T23:59:59.000Z

251

Improving the Efficiency of Die Casting Machine Hydraulic Systems with the Retrofit of Adjustable Frequency Drives  

E-Print Network [OSTI]

because there is typically no way to limit the hydraulic capacity during periods of low demand. As a result, fluid is throttled to lower pressures and excess fluid flow is routed directly back to the system reservoir, wasting motor energy and increasing...

Ambs, L.; Kosanovic, D.; Edberg, C.

252

Can We Improve Energy Efficiency of Secure Disk Systems without Modifying Security Mechanisms?  

E-Print Network [OSTI]

Can We Improve Energy Efficiency of Secure Disk Systems without Modifying Security Mechanisms--Improving energy efficiency of security-aware storage systems is challenging, because security and energy security and energy efficiency is to profile encryption algorithms to decide if storage systems would

Qin, Xiao

253

TRACER: A Trace Replay Tool to Evaluate Energy-Efficiency of Mass Storage Systems  

E-Print Network [OSTI]

TRACER: A Trace Replay Tool to Evaluate Energy-Efficiency of Mass Storage Systems Zhuo Liu1 , Fei of accurately evaluating energy-efficient storage systems and objectively comparing a wide range of energy RAID5 enterprise disk array. Our experiments demonstrate that energy-efficient mass storage systems can

Qin, Xiao

254

Design and global optimization of high-efficiency solar thermal systems with tungsten cermets  

E-Print Network [OSTI]

Solar thermal, thermoelectric, and thermophotovoltaic (TPV) systems have high maximum theoretical efficiencies; experimental systems fall short because of losses by selective solar absorbers and TPV selective emitters. To ...

Chester, David A.

255

A High-Efficiency Grid-Tie Battery Energy Storage System.  

E-Print Network [OSTI]

??Lithium-ion based battery energy storage system has become one of the most popular forms of energy storage system for its high charge and discharge efficiency (more)

Qian, Hao

2011-01-01T23:59:59.000Z

256

Improving the Efficiency of Light-Duty Vehicle HVAC Systems using...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Light-Duty Vehicle HVAC Systems using Zonal Thermoelectric Devices and Comfort Modeling Improving the Efficiency of Light-Duty Vehicle HVAC Systems using Zonal Thermoelectric...

257

COOLING FAN AND SYSTEM PERFORMANCE AND EFFICIENCY IMPROVEMENTS  

SciTech Connect (OSTI)

Upcoming emissions regulations (Tiers 3, 4a and 4b) are imposing significantly higher heat loads on the cooling system than lesser regulated machines. This work was a suite of tasks aimed at reducing the parasitic losses of the cooling system, or improving the design process through six distinct tasks: 1. Develop an axial fan that will provide more airflow, with less input power and less noise. The initial plan was to use Genetic Algorithms to do an automated fan design, incorporating forward sweep for low noise. First and second generation concepts could not meet either performance or sound goals. An experienced turbomachinery designer, using a specialized CFD analysis program has taken over the design and has been able to demonstrate a 5% flow improvement (vs 10% goal) and 10% efficiency improvement (vs 10% goal) using blade twist only. 2. Fan shroud developments, using an 'aeroshroud' concept developed at Michigan State University. Performance testing at Michigan State University showed the design is capable of meeting the goal of a 10% increase in flow, but over a very narrow operating range of fan performance. The goal of 10% increase in fan efficiency was not met. Fan noise was reduced from 0 to 2dB, vs. a goal of 5dB at constant airflow. The narrow range of fan operating conditions affected by the aeroshroud makes this concept unattractive for further development at this time 3. Improved axial fan system modeling is needed to accommodate the numbers of cooling systems to be redesigned to meet lower emissions requirements. A CFD fan system modeling guide has been completed and transferred to design engineers. Current, uncontrolled modeling practices produce flow estimates in some cases within 5% of measured values, and in some cases within 25% of measured values. The techniques in the modeling guide reduced variability to the goal of + 5% for the case under study. 4. Demonstrate the performance and design versatility of a high performance fan. A 'swept blade mixed flow' fan was rapid prototyped from cast aluminum for a performance demonstration on a small construction machine. The fan was mounted directly in place of the conventional fan (relatively close to the engine). The goal was to provide equal airflow at constant fan speed, with 75% of the input power and 5 dB quieter than the conventional fan. The result was a significant loss in flow with the prototype due to its sensitivity to downstream blockage. This sensitivity to downstream blockage affects flow, efficiency, and noise all negatively, and further development was terminated. 5. Develop a high efficiency variable speed fan drive to replace existing slipping clutch style fan drives. The goal for this task was to provide a continuously variable speed fan drive with an efficiency of 95%+ at max speed, and losses no greater than at max speed as the fan speed would vary throughout its entire speed range. The process developed to quantify the fuel savings potential of a variable speed fan drive has produced a simple tool to predict the fuel savings of a variable speed drive, and has sparked significant interest in the use of variable speed fan drive for Tier 3 emissions compliant machines. The proposed dual ratio slipping clutch variable speed fan drive can provide a more efficient system than a conventional single ratio slipping clutch fan drive, but could not meet the established performance goals of this task, so this task was halted in a gate review prior to the start of detailed design. 6. Develop a cooling system air filtration device to allow the use of automotive style high performance heat exchangers currently in off road machines. The goal of this task was to provide a radiator air filtration system that could allow high fin density, louvered radiators to operate in a find dust application with the same resistance to fouling as a current production off-road radiator design. Initial sensitivity testing demonstrated that fan speed has a significant impact on the fouling of radiator cores due to fine dusts, so machines equipped with continuously variabl

Ronald Dupree

2005-07-31T23:59:59.000Z

258

Validation of Energy Efficiency Projects: Can You Run Effective Energy Management Programs Without It?  

E-Print Network [OSTI]

for applying energy efficient upgrades are fan, pump and blower systems since they collectively represent the largest percentage of motor driven load. The experience gained by FLOWCARE Engineering Inc. in reviewing this specific equipment forms the basis...

Martin, V.; Falk, M. A.

259

Energy-Efficiency Improvement Opportunities for the Textile Industry  

E-Print Network [OSTI]

in electric motors 86 5.6.3.1998. United States Industrial Electric Motor Systems Marketto make sure that the electric motors installed in the ring

Hasanbeigi, Ali

2010-01-01T23:59:59.000Z

260

Energy Efficiency Improvement and Cost Saving Opportunities for the Dairy Processing Industry  

E-Print Network [OSTI]

NEMA Premium Efficiency Electric Motor specification wasUnderloaded Electric Motor. Office of Energy Efficiency andElectric Apparatus Service Association (EASA) (2003). The Effect of Repair/Rewinding on Motor Efficiency.

Brush, Adrian

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "motor systems efficiency" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

Measurements of Conversion Efficiency for a Flat Plate Thermophotovoltaic System Using a Photonic Cavity Test System  

SciTech Connect (OSTI)

The performance of a 1 cm{sup 2} thermophotovoltaic (TPV) module was recently measured in a photonic cavity test system. A conversion efficiency of 11.7% was measured at a radiator temperature of 1076 C and a module temperature of 29.9 C. This experiment achieved the highest direct measurement of efficiency for an integrated TPV system. Efficiency was calculated from the ratio of the peak (load matched) electrical power output and the heat absorption rate. Measurements of these two parameters were made simultaneously to assure the validity of the measured efficiency value. This test was conducted in a photonic cavity which mimicked a typical flat-plate TPV system. The radiator was a large, flat graphite surface. The module was affixed to the top of a copper pedestal for heat absorption measurements. The heat absorption rate was proportional to the axial temperature gradient in the pedestal under steady-state conditions. The test was run in a vacuum to eliminate conductive and convective heat transfer mechanisms. The photonic cavity provides the optimal test environment for TPV efficiency measurements because it incorporates all important physical phenomena found in an integrated TPV system: high radiator emissivity and blackbody spectral shape, photon recycling, Lambertian distribution of incident radiation and complex geometric effects. Furthermore, the large aspect ratio between radiating surface area and radiator/module spacing produces a view factor approaching unity with minimal photon leakage.

E.J. Brown; C.T. Ballinger; S.R. Burger; G.W. Charache; L.R. Danielson; D.M. DePoy; T.J. Donovan; M. LoCascio

2000-05-30T23:59:59.000Z

262

Powertrain system for a hybrid electric vehicle  

DOE Patents [OSTI]

A hybrid electric powertrain system is provided including an electric motor/generator drivingly engaged with the drive shaft of a transmission. The electric is utilized for synchronizing the rotation of the drive shaft with the driven shaft during gear shift operations. In addition, a mild hybrid concept is provided which utilizes a smaller electric motor than typical hybrid powertrain systems. Because the electric motor is drivingly engaged with the drive shaft of the transmission, the electric motor/generator is driven at high speed even when the vehicle speed is low so that the electric motor/generator provides more efficient regeneration. 34 figs.

Reed, R.G. Jr.; Boberg, E.S.; Lawrie, R.E.; Castaing, F.J.

1999-08-31T23:59:59.000Z

263

Powertrain system for a hybrid electric vehicle  

DOE Patents [OSTI]

A hybrid electric powertrain system is provided including an electric motor/generator drivingly engaged with the drive shaft of a transmission. The electric is utilized for synchronizing the rotation of the drive shaft with the driven shaft during gear shift operations. In addition, a mild hybrid concept is provided which utilizes a smaller electric motor than typical hybrid powertrain systems. Because the electric motor is drivingly engaged with the drive shaft of the transmission, the electric motor/generator is driven at high speed even when the vehicle speed is low so that the electric motor/generator provides more efficient regeneration.

Reed, Jr., Richard G. (Royal Oak, MI); Boberg, Evan S. (Hazel Park, MI); Lawrie, Robert E. (Whitmore Lake, MI); Castaing, Francois J. (Bloomfield Township, MI)

1999-08-31T23:59:59.000Z

264

SWEEP: Evaluating Computer System Energy Efficiency using Synthetic Workloads  

E-Print Network [OSTI]

and benchmarking methodologies for evaluating energy efficiency, which should ultimately lead to more energy-efficient designs. The Embedded Microprocessor Benchmarking Consortium (EEMBC) released EnergyBench which provides

Eeckhout, Lieven

265

Metering Air Compressor Systems for Efficiency: A Progress Report  

E-Print Network [OSTI]

Air compressors have energy efficiency quantified as SCFM/BHP. However, this efficiency fluctuates over a broad range based on the loading of the compressor. When multiple compressors operate with varying loads, as in a central plant, the overall...

Joseph, B.

2005-01-01T23:59:59.000Z

266

Energy Efficiency Evaluation of Guangzhou West Tower Fa鏰de System  

E-Print Network [OSTI]

Guangzhou West Tower is an extremely tall public building. The energy efficiency evaluation of its fa鏰de should be different than that of ordinary public buildings. Based on the national code GB50189-2005, 揇esign Standard for Energy efficiency...

Meng, Q.; Zhang, L.

2006-01-01T23:59:59.000Z

267

Efficiency improvement of a ground coupled heat pump system from energy management  

E-Print Network [OSTI]

Efficiency improvement of a ground coupled heat pump system from energy management N. Pardo a,*, 脕 coupled heat pump Energy efficiency Numerical simulation a b s t r a c t The installed capacity of an air to improve the efficiency of a ground coupled heat pump air conditioning system by adapting its produced

Fern谩ndez de C贸rdoba, Pedro

268

An Efficient Energy Management System for Android Phone Using Bayesian Networks  

E-Print Network [OSTI]

An Efficient Energy Management System for Android Phone Using Bayesian Networks Young-Seol Lee, proximity, light and orientation sensors for context-awareness. Energy-efficient battery management systems, it becomes an issue to develop the techniques for efficient energy management on a mobile phone [2, 3, 4

Cho, Sung-Bae

269

Energy Efficiency Analysis of MISO-OFDM Communication Systems Considering Power and Capacity Constraints  

E-Print Network [OSTI]

Energy Efficiency Analysis of MISO-OFDM Communication Systems Considering Power and Capacity subchannel capacity threshold. Moreover, the energy efficiency of MISO-OFDM communication systems starts-input single-output (MISO) . orthogonal frequency division multiplexing (OFDM) . energy efficiency. capacity

Wang, Cheng-Xiang

270

Energy Efficient Phase Change Memory Based Main Memory for Future High Performance Systems  

E-Print Network [OSTI]

hybrid system using a commodity DRAM cache. Keywords-Memory Controller, DRAM, PCM, Energy I. INTRODUCTIONEnergy Efficient Phase Change Memory Based Main Memory for Future High Performance Systems Abstract system of similar storage size. Our proposed system is highly energy efficient and provides 35

Conte, Thomas M.

271

An electrochemical system for efficiently harvesting low-grade heat energy  

E-Print Network [OSTI]

Efficient and low-cost thermal energy-harvesting systems are needed to utilize the tremendous low-grade heat sources. Although thermoelectric devices are attractive, its efficiency is limited by the relatively low ...

Lee, Seok Woo

272

Customer System Efficiency Improvement Assessment: Description and examination of system characterization data  

SciTech Connect (OSTI)

This report describes three data bases that were developed in the Customer System Efficiency Improvement (CSEI) Assessment project to help characterize transmission and distribution (T and D) system losses experienced by utility customers in the Pacific Northwest. A principal objective of this project is to assess the potential for electric energy conservation in the T and D systems of BPA's utility customers. The three data bases provide essential input on the number and operating characteristics of T and D component stocks that was used in another task of the CSEI Project to estimate the conservation supply functions that result from replacing existing stocks with more efficient components (Tepel et al. 1986). This document describes the three data bases, provides a guide to their use, and presents a summary characterization of the principal loss-generating components (lines and transformers) of the region's T and D systems.

Callaway, J.W.; DeSteese, J.G.

1986-12-01T23:59:59.000Z

273

Max Tech and Beyond: Maximizing Appliance and Equipment Efficiency by Design  

E-Print Network [OSTI]

efficiency standards were released for small electric motors (electric motors (1 200 HP)[4]. As of January 1, 2010, standards mandate NEMA Premium efficiency

Desroches, Louis-Benoit

2012-01-01T23:59:59.000Z

274

Torquespeed relationship of the bacterial flagellar motor  

E-Print Network [OSTI]

. speed curve is derived from the usual external load torque vs. speed curve as follows. The motor璼peed curve. The same physics also can explain certain puzzling properties of other motors. energy conversion external loads and gives an indication of the energy conversion efficiency. Moreover, the torque

Oster, George

275

A new power combining and outphasing modulation system for high-efficiency power amplification  

E-Print Network [OSTI]

This paper describes a new power combining and outphasing system that provides both high efficiency and linear output control. Whereas conventional outphasing systems utilize two power amplifiers, the system introduced ...

Perreault, David J.

276

A New Power Combining and Outphasing Modulation System for High-Efficiency Power Amplification  

E-Print Network [OSTI]

This paper describes a new power combining and outphasing system that provides both high efficiency and linear output control. Whereas conventional outphasing systems utilize two power amplifiers, the system introduced ...

Perreault, David J.

277

IEMDC IN-LINE ELECTRIC MOTOR DRIVEN COMPRESSOR  

SciTech Connect (OSTI)

This report contains the final project summary and deliverables required by the award for the development of an In-line Electric Motor Driven Compressor (IEMDC). Extensive work was undertaken during the course of the project to develop the motor and the compressor section of the IEMDC unit. Multiple design iterations were performed to design an electric motor for operation in a natural gas environment and to successfully integrate the motor with a compressor. During the project execution, many challenges were successfully overcome in order to achieve the project goals and to maintain the system design integrity. Some of the challenges included limiting the magnitude of the compressor aerodynamic loading for appropriate sizing of the magnetic bearings, achieving a compact motor rotor size to meet the rotor dynamic requirements of API standards, devising a motor cooling scheme using high pressure natural gas, minimizing the impact of cooling on system efficiency, and balancing the system thrust loads for the magnetic thrust bearing. Design methods that were used on the project included validated state-of-the-art techniques such as finite element analysis and computational fluid dynamics along with the combined expertise of both Curtiss-Wright Electro-Mechanical Corporation and Dresser-Rand Company. One of the most significant areas of work undertaken on the project was the development of the unit configuration for the system. Determining the configuration of the unit was a significant step in achieving integration of the electric motor into a totally enclosed compression system. Product review of the IEMDC unit configuration was performed during the course of the development process; this led to an alternate design configuration. The alternate configuration is a modular design with the electric motor and compressor section each being primarily contained in its own pressure containing case. This new concept resolved the previous conflict between the aerodynamic flow passage requirements and electric motor requirements for support and utilities by bounding the flowpath within the compressor section. However most importantly, the benefits delivered by the new design remained the same as those proposed by the goals of the project. In addition, this alternate configuration resulted in the achievement of a few additional advantages over the original concept such as easier maintenance, operation, and installation. Interaction and feedback solicited from target clients regarding the unit configuration supports the fact that the design addresses industry issues regarding accessibility, maintainability, preferred operating practice, and increased reliability.

Michael J. Crowley; Prem N. Bansal

2004-10-01T23:59:59.000Z

278

Creating Parameterized and Energy-Efficient System Generator Designs  

E-Print Network [OSTI]

important, it is desired that the designer can derive energy efficient designs using these design tools efficient designs using MATLAB/Simulink based design tools. The implementation of an adap- tive beamforming. In the paper, we propose a new tool called PyGen, which can be used to develop parameterized and energy

Prasanna, Viktor K.

279

Radial-Gap Permanent Magnet Motor and Drive Research FY 2004  

SciTech Connect (OSTI)

The objective of this task was to study permanent magnet (PM) radial-gap traction drive systems that could meet the U.S. Department of Energy FreedomCAR Program's 2010 goals to expose weaknesses or identify strengths. Initially, the approach was to compare attributes such as physical deformations during operation, performance (torque, power, efficiency versus speed), material requirements (strength), material costs, manufacturability, weight, power density, specific power, reliability, and drivability for specific motors. Three motors selected were the commercially available 60-kW radial-gap surface-mounted PM motor manufactured by UQM Technologies, Inc.; a hypothetical PM motor with rotor-supported magnets similar to the Honda MCF-21; and Delphi's automotive electric machine drive motor, whose rotor is a ferromagnetic cylinder, held at one end by a shaft that supports the magnets on its inner surface. Potential problems have appeared related to PM motors, such as (1) high no-load spin losses and high operational power losses, probably from eddy current losses in the rotor; (2) the undemonstrated dual mode inverter control (DMIC) for driving a brushless dc motor (BDCM) (UQM and Delphi motors); (3) uncertainty about the potential for reducing current with DMIC; and (4) uncertainty about the relation between material requirements and maximum rotor speed. Therefore, the approach was changed to study in detail three of the comparison attributes: drivability, performance, and material requirements. Drivability and related problems were examined by demonstrating that DMIC may be used to drive an 18-pole 30-kW PM motor to 6000 rpm, where the maximum electrical frequency is 900 Hz. An available axial-gap test motor with 18 poles was used because its control is identical to that of a radial gap PM motor. Performance was analytically examined, which led to a derivation showing that DMIC controls a PM motor so that the motor uses minimum current to produce any power regardless of speed for relative speeds, n = {omega}/{omega}{sub base} {ge} 2. Performance was also examined with efficiency measurements during the 30-kW PM motor test. Material requirements were examined with finite-element analyses (FEA) to determine the speed and location where yield starts and the corresponding deformations and stresses.

McKeever, J.W.

2005-02-11T23:59:59.000Z

280

Floating Loop System For Cooling Integrated Motors And Inverters Using Hot Liquid Refrigerant  

DOE Patents [OSTI]

A floating loop vehicle component cooling and air-conditioning system having at least one compressor for compressing cool vapor refrigerant into hot vapor refrigerant; at least one condenser for condensing the hot vapor refrigerant into hot liquid refrigerant by exchanging heat with outdoor air; at least one floating loop component cooling device for evaporating the hot liquid refrigerant into hot vapor refrigerant; at least one expansion device for expanding the hot liquid refrigerant into cool liquid refrigerant; at least one air conditioning evaporator for evaporating the cool liquid refrigerant into cool vapor refrigerant by exchanging heat with indoor air; and piping for interconnecting components of the cooling and air conditioning system.

Hsu, John S [Oak Ridge, TN; Ayers, Curtis W [Kingston, TN; Coomer, Chester [Knoxville, TN; Marlino, Laura D [Oak Ridge, TN

2006-02-07T23:59:59.000Z

Note: This page contains sample records for the topic "motor systems efficiency" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

Anoka Municipal Utility- Commercial Energy Efficiency Rebate Program  

Broader source: Energy.gov [DOE]

Anoka Municipal Utility (AMU) offers the Commercial and Industrial Lighting and Motor Rebate Program for commercial and industrial customers who install high efficiency lighting, motors, and...

282

Energy Efficient Control of a Boosting System with Multiple Variable-Speed Pumps in Parallel  

E-Print Network [OSTI]

with multiple variable-speed pumps in parallel is to minimize the pump system energy consumption by controlEnergy Efficient Control of a Boosting System with Multiple Variable-Speed Pumps in Parallel Zhenyu. The experimental results show a huge potential to improve the energy efficiency of multi-pump systems using

Yang, Zhenyu

283

An efficient numerical terrestrial scheme (ENTS) for fast earth system modelling  

E-Print Network [OSTI]

An efficient numerical terrestrial scheme (ENTS) for fast earth system modelling Mark Williamson Working Paper 83 #12;An efficient numerical terrestrial scheme (ENTS) for fast earth system modelling Mark for long time period simulations and large ensemble studies in Earth system models of intermediate

Williamson, Mark

284

A New Thermal-Conscious System-Level Methodology for Energy-Efficient Processor Voltage Selection  

E-Print Network [OSTI]

A New Thermal-Conscious System-Level Methodology for Energy-Efficient Processor Voltage Selection a thermal-conscious system-level methodology to make energy-efficient voltage selection (VS) for nanometer), thermal resistance, are integrated and considered in our system models, and their impacts on energy

Wang, Yu

285

Impact of the Variable Refrigerant Volume Air Conditioning System on Building Energy Efficiency  

E-Print Network [OSTI]

ICEBO2006, Shenzhen, China HVAC Technologies for Energy Efficiency Vol.IV-1-3 Impact of the Variable Refrigerant Volume Air Conditioning System on Building Energy Efficiency Huawei Zhu Zhejiang Urban and Rural Planning Design Institute... conditioning system has led to extensive criticism. 2. THE CHARACTERISTICS OF THE VARIABLE REFRIGERANT VOLUME AIR CONDITIONING SYSTEM AND ITS PRESENT APPLICATION ICEBO2006, Shenzhen, China HVAC Technologies for Energy Efficiency Vol.IV-1-3 2...

Zhu, H.

2006-01-01T23:59:59.000Z

286

Electric Motor Remanufacturing and Energy Savings Sahil Sahni1  

E-Print Network [OSTI]

Electric Motor Remanufacturing and Energy Savings Sahil Sahni1 , Avid Boustani1 , Timothy Gutowski to this study. #12;Contents 1 Introduction to Electric Motors 1 1.1 Motor Classifications of Figures 1 Motor System Electricity Consumption by Industrial Sectors (TWh) for 1994. A total of 691

Gutowski, Timothy

287

EE443L Lab 2: Modeling a DC Motor Introduction  

E-Print Network [OSTI]

: In this lab we will develop and validate a basic model of a permanent magnet DC motor (Yaskawa Electric MINI: The DC motor is a common actuator in control systems that converts electrical energy into rotational Procedure: Through the following steps, motor parameters for the Yaskawa Electric MINI-Minertia motor

Wedeward, Kevin

288

Low speed control of a DC motor driving a mechanical system with fuzzy adaptive compensation  

E-Print Network [OSTI]

and lubricated sliding junctions. For experiments, an IBM PC, a DSPACE DSP board, SE uLM and Real Time Workshop are used. All three control systems can achieve such a very low sustainable speed as 0.005 rad/sec without stick-slip oscillations, which appear when...

Hyun, Dongyoon

1997-01-01T23:59:59.000Z

289

An Analysis of Motor System Optimization Options- A Question of Diminishing Return on Investment  

E-Print Network [OSTI]

This paper presents the verified results of a pump system optimization project at a major midwestern brewery. A 150-horsepower "sweet water" pump circulates a glycol/water solution to cool tanks of beer during fermentation. To keep the pump from...

Wroblewski, R. G.; Herro, M.; Schiebel, S.; Waffenschmidt, D.

290

Energy Efficiency Improvement and Cost Saving Opportunities for the Pharmaceutical Industry. An ENERGY STAR Guide for Energy and Plant Managers  

E-Print Network [OSTI]

NEMA Premium Efficiency Electric Motor specification wasUnderloaded Electric Motor. Office of Energy Efficiency andElectric Apparatus Service Association (EASA) (2003). The Effect of Repair/Rewinding on Motor Efficiency.

Galitsky, Christina

2008-01-01T23:59:59.000Z

291

Energy Efficiency Improvement and Cost Saving Opportunities for the Glass Industry. An ENERGY STAR Guide for Energy and Plant Managers  

E-Print Network [OSTI]

NEMA Premium Efficiency Electric Motor specification wasUnderloaded Electric Motor. Office of Energy Efficiency andElectric Apparatus Service Association (EASA) (2003). The Effect of Repair/Rewinding on Motor Efficiency.

Worrell, Ernst

2008-01-01T23:59:59.000Z

292

Energy Efficient Design in MIMO Multicell Systems with Time Average QoS Constraints  

E-Print Network [OSTI]

1 Energy Efficient Design in MIMO Multicell Systems with Time Average QoS Constraints Subhash Abstract--In this work, we address the issue of energy efficient design in a MIMO multi-cell network. Energy efficient design in cellular networks addresses the concerns of ICT related carbon emissions [1

Boyer, Edmond

293

Absorber and emitter for solar thermo-photovoltaic systems to achieve efficiency  

E-Print Network [OSTI]

Absorber and emitter for solar thermo- photovoltaic systems to achieve efficiency exceeding-junction solar cell can attain efficiency that exceeds the Shockley-Queisser limit. 2009 Optical Society and links 1. W. Shockley, and H. J. Queisser, "Detailed Balance Limit of Efficiency of p-n Junction Solar

Fan, Shanhui

294

Efficient Data Migration to Conserve Energy in Streaming Media Storage Systems  

E-Print Network [OSTI]

Efficient Data Migration to Conserve Energy in Streaming Media Storage Systems Yunpeng Chai, Zhihui. Existing energy conservation techniques are inadequate to achieve high energy efficiency for streaming in this paper a new energy-efficient method called Explicit Energy Saving Disk Cooling or EESDC. EESDC

Qin, Xiao

295

Every Joule is Precious: The Case for Revisiting Operating System Design for Energy Efficiency  

E-Print Network [OSTI]

Every Joule is Precious: The Case for Revisiting Operating System Design for Energy Efficiency Amin, it is important to develop low-level mechanisms and higher- level policies to maximize energy efficiency and implementation from the point of view of energy efficiency rather than the more traditional OS metric

Vahdat, Amin

296

Energy-Efficient Spectrum Sharing in Relay-Assisted Cognitive Radio Systems  

E-Print Network [OSTI]

Energy-Efficient Spectrum Sharing in Relay-Assisted Cognitive Radio Systems (Invited Paper) Mariem of a relevant spectrum game. Two energy-efficient sources communicating with their respective destination energy-efficient sources. Keywords: resource allocation, cognitive radio, cooperative transmission, Nash

Paris-Sud XI, Universit茅 de

297

ac motor control: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Summary: ??Permanent magnet Brushless DC motor drives are being employed in newlinemany variable speed applications due to their high efficiency, silent operation, newlinecompact...

298

ac motor controller: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Summary: ??Permanent magnet Brushless DC motor drives are being employed in newlinemany variable speed applications due to their high efficiency, silent operation, newlinecompact...

299

Building Green in Greensburg: Dwane Shank Motors GM Dealership  

Office of Energy Efficiency and Renewable Energy (EERE)

This poster highlights energy efficiency, renewable energy, and sustainable features of the high-performing Shank Motors GM Dealership building in Greensburg, Kansas.

300

Boiler System Efficiency Improves with Effective Water Treatment  

E-Print Network [OSTI]

Water treatment is an important aspect of boiler operation which can affect efficiency or result in damage if neglected. Without effective water treatment, scale can form on boiler tubes, reducing heat transfer, and causing a loss of boiler...

Bloom, D.

Note: This page contains sample records for the topic "motor systems efficiency" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

Designing Alternatives to State Motor Fuel Taxes  

E-Print Network [OSTI]

Designing Alternatives to State Motor Fuel Taxes All states rely on gasoline taxes as one source efficiency and alternative fuel vehicles reduce both the equity of the revenue source and its growth over, leading to higher fuel efficiency, wide variations in fuel efficiency, and alternative- fuel vehicles

Bertini, Robert L.

302

An Examination of Motor Skills in Children who Stutter  

E-Print Network [OSTI]

Recently, research has postulated that stuttering is a motor disorder that results from brain abnormalities within the central nervous system. Based on evidence of numerous irregularities within various motor systems, it has been suggested...

2012-10-19T23:59:59.000Z

303

Submersible canned motor transfer pump  

DOE Patents [OSTI]

A transfer pump used in a waste tank for transferring high-level radioactive liquid waste from a waste tank and having a column assembly, a canned electric motor means, and an impeller assembly with an upper impeller and a lower impeller connected to a shaft of a rotor assembly. The column assembly locates a motor housing with the electric motor means adjacent to the impeller assembly which creates an hydraulic head, and which forces the liquid waste, into the motor housing to cool the electric motor means and to cool and/or lubricate the radial and thrust bearing assemblies. Hard-on-hard bearing surfaces of the bearing assemblies and a ring assembly between the upper impeller and electric motor means grind large particles in the liquid waste flow. Slots in the static bearing member of the radial bearing assemblies further grind down the solid waste particles so that only particles smaller than the clearances in the system can pass therethrough, thereby resisting damage to and the interruption of the operation of the transfer pump. The column assembly is modular so that sections can be easily assembled, disassembled and/or removed. A second embodiment employs a stator jacket which provides an alternate means for cooling the electric motor means and lubricating and/or cooling the bearing assemblies, and a third embodiment employs a variable level suction device which allows liquid waste to be drawn into the transfer pump from varying and discrete levels in the waste tank.

Guardiani, Richard F. (Ohio Township, Allegheny County, PA); Pollick, Richard D. (Sarver, PA); Nyilas, Charles P. (Monroeville, PA); Denmeade, Timothy J. (Lower Burrell, PA)

1997-01-01T23:59:59.000Z

304

Submersible canned motor mixer pump  

DOE Patents [OSTI]

A mixer pump used in a waste tank for mobilizing high-level radioactive liquid waste having a column assembly containing power cables, a motor housing with electric motor means which includes a stator can of a stator assembly and a rotor can of a rotor assembly, and an impeller assembly with an impeller connected to a shaft of the rotor assembly. The column assembly locates the motor housing with the electric motor means adjacent to the impeller which creates an hydraulic head, and which forces the liquid waste into the motor housing to cool the electric motor means and to lubricate radial and thrust bearing assemblies. Hard-on-hard bearing surfaces of the bearing assemblies and a ring assembly between the impeller and electric motor means act to grind down large particles in the liquid waste flow. These larger particles are received in slots in the static bearing members of the radial bearing assemblies. Only solid waste particles smaller than the clearances in the system can pass therethrough, thereby resisting damage to and the interruption of the operation of the mixer pump.

Guardiani, Richard F. (Ohio Township, PA); Pollick, Richard D. (Sarver, PA)

1997-01-01T23:59:59.000Z

305

Submersible canned motor mixer pump  

DOE Patents [OSTI]

A mixer pump is described used in a waste tank for mobilizing high-level radioactive liquid waste having a column assembly containing power cables, a motor housing with electric motor means which includes a stator can of a stator assembly and a rotor can of a rotor assembly, and an impeller assembly with an impeller connected to a shaft of the rotor assembly. The column assembly locates the motor housing with the electric motor means adjacent to the impeller which creates an hydraulic head, and which forces the liquid waste into the motor housing to cool the electric motor means and to lubricate radial and thrust bearing assemblies. Hard-on-hard bearing surfaces of the bearing assemblies and a ring assembly between the impeller and electric motor means act to grind down large particles in the liquid waste flow. These larger particles are received in slots in the static bearing members of the radial bearing assemblies. Only solid waste particles smaller than the clearances in the system can pass there through, thereby resisting damage to and the interruption of the operation of the mixer pump. 10 figs.

Guardiani, R.F.; Pollick, R.D.

1997-10-07T23:59:59.000Z

306

Extended cage adjustable speed electric motors and drive packages  

DOE Patents [OSTI]

The rotor cage of a motor is extended, a second stator is coupled to this extended rotor cage, and the windings have the same number of poles. The motor torque and speed can be controlled by either injecting energy into or extracting energy out from the rotor cage. The motor produces less harmonics than existing doubly-fed motors. Consequently, a new type of low cost, high efficiency drive is produced. 12 figs.

Hsu, J.S.

1999-03-23T23:59:59.000Z

307

Extended cage adjustable speed electric motors and drive packages  

DOE Patents [OSTI]

The rotor cage of a motor is extended, a second stator is coupled to this extended rotor cage, and the windings have the same number of poles. The motor torque and speed can be controlled by either injecting energy into or extracting energy out from the rotor cage. The motor produces less harmonics than existing doubly-fed motors. Consequently, a new type of low cost, high efficiency drive is produced.

Hsu, John S. (Oak Ridge, TN)

1999-01-01T23:59:59.000Z

308

An energy-efficient communication system for ad hoc wireless and sensor networks  

E-Print Network [OSTI]

Existing ad hoc wireless and sensor network systems often trade off energy against performance. As such, it is hard to find a single deployable system that supports high data rates while maintaining energy-efficient ...

Tetteh, William Nii Adjetey

2007-01-01T23:59:59.000Z

309

Energy efficient scheduling techniques for real-time embedded systems  

E-Print Network [OSTI]

Battery-powered portable embedded systems have been widely used in many applications. These embedded systems have to concurrently perform a multitude of complex tasks under stringent time constraints. As these systems become more complex...

Prathipati, Rajesh Babu

2004-09-30T23:59:59.000Z

310

Comparison of Control Strategies for Energy Efficient Building HVAC Systems  

E-Print Network [OSTI]

optimal control design for HVAC systems. In Dynamic SystemOpti- mal control of HVAC systems in the presence of imper-consumption minimization of hvac sys- tems using model

Maasoumy, Mehdi; Sangiovanni-Vincentelli, Alberto

2014-01-01T23:59:59.000Z

311

Efficient Bulk Data Replication for the Earth System Grid  

E-Print Network [OSTI]

for the Earth System Grid Alex Sim 1 , Dan Gunter 1 , VijayaUSA Abstract The Earth System Grid (ESG) community faces theIntroduction The Earth System Grid (ESG) [1] community faces

Sim, Alex

2010-01-01T23:59:59.000Z

312

Bottom-up Representation of Industrial Energy Efficiency Technologies in Integrated Assessment Models for the Cement Sector  

E-Print Network [OSTI]

the NEMA Premium Efficiency Electric Motor specification wasElectric Apparatus Service Association (EASA) (2003). The Effect of Repair/Rewinding on Motor Efficiency.

Sathaye, J.

2011-01-01T23:59:59.000Z

313

Energy Efficiency Improvement and Cost Saving Opportunities for Cement Making. An ENERGY STAR Guide for Energy and Plant Managers  

E-Print Network [OSTI]

the NEMA Premium Efficiency Electric Motor specification wasElectric Apparatus Service Association (EASA) (2003). The Effect of Repair/Rewinding on Motor Efficiency.

Worrell, Ernst

2008-01-01T23:59:59.000Z

314

Fast Track Communication Efficiency and large deviations in time-asymmetric  

E-Print Network [OSTI]

-state engine. We find in general that the form of efficiency probability distributions is similar to those systems, molecular motors, large deviations in non-equilibrium systems 1. Introduction As engineeringFast Track Communication Efficiency and large deviations in time-asymmetric stochastic heat engines

Geissler, Phillip

315

Steam Power Partnership: Improving Steam System Efficiency Through Marketplace Partnerships  

E-Print Network [OSTI]

to support the steam efficiency program. Today, the Steam Team includes, the North American Insulation Manufacturers Association (NAIMA), the American Gas Association (AGA), the Council of Industrial Boiler Owners (ClBO), Armstrong International... pinch technology, and high performance steam. ? Armstrong International - Three worldwide factory seminar facilities, 13 North American sales representative facilities, 4 international sales representative facilities, 8 co-sponsored facilities, 2...

Jones, T.

316

Chemistry in Motion: Tiny Synthetic Motors  

E-Print Network [OSTI]

In this Account, we describe how synthetic motors that operate by self-diffusiophoresis make use of a self-generated concentration gradient to drive motor motion. A description of propulsion by self-diffusiophoresis is presented for Janus particle motors comprising catalytic and noncatalytic faces. The properties of the dynamics of chemically powered motors are illustrated by presenting the results of particle-based simulations of sphere-dimer motors constructed from linked catalytic and noncatalytic spheres. The geometries of both Janus and sphere-dimer motors with asymmetric catalytic activity support the formation of concentration gradients around the motors. Because directed motion can occur only when the system is not in equilibrium, the nature of the environment and the role it plays in motor dynamics are described. Rotational Brownian motion also acts to limit directed motion, and it has especially strong effects for very small motors. We address the following question: how small can motors be and still exhibit effects due to propulsion, even if only to enhance diffusion? Synthetic motors have the potential to transform the manner in which chemical dynamical processes are carried out for a wide range of applications.

Peter H. Colberg; Shang Yik Reigh; Bryan Robertson; Raymond Kapral

2014-11-03T23:59:59.000Z

317

Scheduling Heterogeneous Wireless Systems for Efficient Spectrum Access  

E-Print Network [OSTI]

Radio approach for usage of the Virtual Unlicensed Spectrum (CORVUS) system exploits unoccupied licensed

Bao, Lichun; Liao, Shenghui

2010-01-01T23:59:59.000Z

318

Adjustable Speed Drive Part-Load Efficiency  

SciTech Connect (OSTI)

This is one in a series of tip sheets to help manufacturers optimize their industrial motor and motor-driven systems.

Not Available

2008-07-01T23:59:59.000Z

319

Energy Efficiency Improvement and Cost Saving Opportunities for the Pharmaceutical Industry. An ENERGY STAR Guide for Energy and Plant Managers  

E-Print Network [OSTI]

Oversized and Underloaded Electric Motor. Office of EnergyOptimization Electric Motor System at a Corporate CampusUnited States Industrial Electric Motor Systems Market

Galitsky, Christina

2008-01-01T23:59:59.000Z

320

High Quality Down Lighting Luminaire with 73% Overall System Efficiency  

SciTech Connect (OSTI)

This report summarizes work to develop a high flux, high efficiency LED-based downlight at OSRAM SYLVANIA under US Department of Energy contract DE-FC26-08NT01582. A new high power LED and electronic driver were developed for these downlights. The LED achieved 100 lumens per watt efficacy and 1700 lumen flux output at a correlated color temperature of 3500K. The driver had 90% electrical conversion efficiency while maintaining excellent power quality with power factor >0.99, and total harmonic distortion <10%. Two styles of downlights using the LED and driver were shown to exceed the project targets for steady-state luminous efficacy and flux of 70 lumens per watt and 1300 lumens, respectively. Compared to similar existing downlights using compact fluorescent or LED sources, these downlights had much higher efficacy at nearly the same luminous flux.

Robert Harrison; Steven C. Allen; Joseph Bernier; Robert Harrison

2010-08-31T23:59:59.000Z

Note: This page contains sample records for the topic "motor systems efficiency" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

Biological optimization systems for enhancing photosynthetic efficiency and methods of use  

DOE Patents [OSTI]

Biological optimization systems for enhancing photosynthetic efficiency and methods of use. Specifically, methods for enhancing photosynthetic efficiency including applying pulsed light to a photosynthetic organism, using a chlorophyll fluorescence feedback control system to determine one or more photosynthetic efficiency parameters, and adjusting one or more of the photosynthetic efficiency parameters to drive the photosynthesis by the delivery of an amount of light to optimize light absorption of the photosynthetic organism while providing enough dark time between light pulses to prevent oversaturation of the chlorophyll reaction centers are disclosed.

Hunt, Ryan W.; Chinnasamy, Senthil; Das, Keshav C.; de Mattos, Erico Rolim

2012-11-06T23:59:59.000Z

322

Design of control for efficiency of AUV power systems  

E-Print Network [OSTI]

The MIT Rapid Development Group designed and built an internal combustion hybrid recharging system for the REMUS 600 Autonomous Underwater Vehicle (AUV) in collaboration with the MIT Lincoln Laboratory. This power system ...

Ware, Laura M. (Laura Marie)

2012-01-01T23:59:59.000Z

323

Advanced Klystrons for High Efficiency Accelerator Systems - Final Report  

SciTech Connect (OSTI)

This program explored tailoring of RF pulses used to drive accelerator cavities. Simulations indicated that properly shaping the pulse risetime to match accelerator cavity characteristics reduced reflected power and increased total efficiency. Tailoring the pulse requires a high power, gridded, klystron to shape the risetime while also controlling the beam current. The Phase I program generated a preliminary design of a gridded electron gun for a klystron producing 5-10 MW of RF power. This required design of a segmented cathode using Controlled Porosity Reservoir cathodes to limit power deposition on the grid. The program was successful in computationally designing a gun producing a high quality electron beam with grid control. Additional analysis of pulse tailoring indicated that technique would only be useful for cavity drive pulses that were less than approximately 2-3 times the risetime. Otherwise, the efficiency gained during the risetime of the pulse became insignificant when considering the efficiency over the entire pulse. Consequently, it was determined that a Phase II program would not provide sufficient return to justify the cost. Never the less, other applications for a high power gridded gun are currently being pursued. This klystron, for example, would facilitate development inverse Comptom x-ray sources by providing a high repetition rate (10 -100 kHz) RF source.

Read, Michael; Ives, Robert Lawrence

2014-03-26T23:59:59.000Z

324

Opportunities for Energy Efficiency and Automated Demand Response in Industrial Refrigerated Warehouses in California  

E-Print Network [OSTI]

for defrosting/compressor cooling or in frigid climates withthermosiphon compressor cooling, premium-efficiency motors,

Lekov, Alex

2009-01-01T23:59:59.000Z

325

U.S. Department of Energy's Motor Challenge Program: A National...  

Broader source: Energy.gov (indexed) [DOE]

industry needs, and market drivers associated with improving industrial electric motor-driven systems. The key strategies and tactics being employed by the DOE Motor...

326

Max Tech and Beyond: Maximizing Appliance and Equipment Efficiency by Design  

E-Print Network [OSTI]

United States Industrial Electric Motor Systems MarketStandards, Electric Motors, http://www1.eere.energy.gov/5] DOE. (2010). Small Electric Motors Final Rule Technical

Desroches, Louis-Benoit

2012-01-01T23:59:59.000Z

327

Energy Efficiency Improvement and Cost Saving Opportunities for the Vehicle Assembly Industry: An ENERGY STAR Guide for Energy and Plant Managers  

E-Print Network [OSTI]

the NEMA Premium Efficiency Electric Motor specification wasUnderloaded Electric Motor. Office of Energy Efficiency andElectric Apparatus Service Association (EASA) (2003). The Effect of Repair/Rewinding on Motor Efficiency.

Galitsky, Christina

2008-01-01T23:59:59.000Z

328

Energy Efficiency Improvement and Cost Saving Opportunities for the Fruit and Vegetable Processing Industry. An ENERGY STAR Guide for Energy and Plant Managers  

E-Print Network [OSTI]

NEMA Premium Efficiency Electric Motor specification wasUnderloaded Electric Motor. Office of Energy Efficiency andElectric Apparatus Service Association (EASA) (2003). The Effect of Repair/Rewinding on Motor Efficiency.

Masanet, Eric

2008-01-01T23:59:59.000Z

329

High Efficiency Engine Systems Development and Evaluation | Department of  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-UpHeatMulti-Dimensional Subject:Ground Hawaii CleanHeatinHigh Efficiency ColdEnergy 2

330

High Efficiency Engine Systems Development and Evaluation | Department of  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-UpHeatMulti-Dimensional Subject:Ground Hawaii CleanHeatinHigh Efficiency ColdEnergy

331

Ultra Efficient Combined Heat, Hydrogen, and Power System  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustion |Energy Usage 禄of EnergyTheTwo New EnergyofDEVELOPMENT ORGANIZATIONS |Ultra Efficient

332

Low-Latency Techniques for Improving System Energy Efficiency /  

E-Print Network [OSTI]

Operating Systems and Computer Architecture, 2008. [81] Y.Symposium on Computer Architecture, pages 338347, 2010. [on High Performance Computer Architecture, pages 291300,

Strong, Richard D.

2013-01-01T23:59:59.000Z

333

Lean Gasoline System Development for Fuel Efficient Small Car...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

and Vehicle Technologies Program Annual Merit Review and Peer Evaluation ace063smith2011o.pdf More Documents & Publications Lean Gasoline System Development for Fuel...

334

USDA Renewable Energy Systems and Energy Efficiency Improvement...  

Office of Environmental Management (EM)

Department of Agriculture's (USDA's) Rural Business Cooperative-Service Agency, under the Rural Energy for America Program, is accepting applications for Renewable Energy Systems...

335

Lean Gasoline System Development for Fuel Efficient Small Car  

Broader source: Energy.gov (indexed) [DOE]

NOx after-treatment systems have functional implementation limitations (i.e. performance, cost, packaging, etc.) * Significant fuel economy improvement requires integration of...

336

Force-velocity relations for multiple molecular motor transportation  

E-Print Network [OSTI]

A transition rate model of cargo transportation by N effective molecular motors is proposed. Under the assumption of steady state, the force-velocity curve of multi-motor system can be derived from the force-velocity curve of single motor. Our work shows, in the case of low load, the velocity of multi-motor system can decrease or increase with increasing motor number, which is dependent on the single motor force-velocity curve. And most commonly, the velocity decreases. This gives a possible explanation to some recent experimental observations.

Wang, Ziqing

2009-01-01T23:59:59.000Z

337

Force-velocity relations for multiple-molecular-motor transport  

E-Print Network [OSTI]

A transition rate model of cargo transport by $N$ molecular motors is proposed. Under the assumption of steady state, the force-velocity curve of multi-motor system can be derived from the force-velocity curve of single motor. Our work shows, in the case of low load, the velocity of multi-motor system can decrease or increase with increasing motor number, which is dependent on the single motor force-velocity curve. And most commonly, the velocity decreases. This gives a possible explanation to some recent

Ziqing Wang; Ming Li

2009-10-01T23:59:59.000Z

338

A high-efficiency indirect lighting system utilizing the solar 1000 sulfur lamp  

SciTech Connect (OSTI)

High-lumen light sources represent unique challenges and opportunities for the design of practical and efficient interior lighting systems. High-output sources require a means of large-scale distribution and avoidance of high-luminance glare while providing efficient delivery. An indirect lighting system has been developed for use with a 1,000 Watt sulfur lamp that efficiently utilizes the high-output source to provide quality interior lighting. This paper briefly describes the design and initial testing of this new system.

Siminovitch, M.; Gould, C.; Page, E.

1997-06-01T23:59:59.000Z

339

IMPROVING THE EFFICIENCY OF AN EXISTING GROUNDWATER REMEDIATION SYSTEM  

E-Print Network [OSTI]

.9 kilowatt total) 14 #12;ENERGY IMPROVEMENT BENEFITS 15 #12;RETURN ON INVESTMENT: SOLAR PANELS 16 #12 of grid energy with solar panel arrays Long-term operations and maintenance costs were significantly.7 kilowatt total) 13 #12;GROUNDWATER SYSTEM ENERGY IMPROVEMENTS 颅 Northern Solar Array: 56 panel system (10

Illinois at Urbana-Champaign, University of

340

Energy Efficiency: The New Holy Grail of Data Management Systems Research  

E-Print Network [OSTI]

Energy Efficiency: The New Holy Grail of Data Management Systems Research Stavros Harizopoulos HP energy-friendly hardware. Despite the growing body of research in power management techniques, there has been little work to date on energy efficiency from a data management software per- spective

Note: This page contains sample records for the topic "motor systems efficiency" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

A System for Energy-Efficient Data Management Yi-Cheng Tu 1  

E-Print Network [OSTI]

.e., query processing, indexing). Therefore, there is the need to develop DBMSs with energy efficiencyA System for Energy-Efficient Data Management Yi-Cheng Tu 1 , Xiaorui Wang 2 , Bo Zeng 3 1 Dept, University of South Florida, U.S.A. 1 ytu@cse.usf.edu, 2 xwang@ece.osu.edu, 3 bzeng@usf.edu ABSTRACT Energy

Tu, Yicheng

342

Energy-Efficient, Utility Accrual Scheduling under Resource Constraints for Mobile Embedded Systems  

E-Print Network [OSTI]

Corporation Redmond, WA 98052, USA pengli@microsoft.com Abstract We present an energy-efficient, utility voltage scaling (DVS) is a common mechanism studied in the past to save CPU energy [3Energy-Efficient, Utility Accrual Scheduling under Resource Constraints for Mobile Embedded Systems

Ravindran, Binoy

343

Power and Area Efficient Turbo Decoder Implementation for Mobile Wireless Systems  

E-Print Network [OSTI]

Power and Area Efficient Turbo Decoder Implementation for Mobile Wireless Systems J. H. Han1 , A. T Abstract-- The authors present a low power and area efficient turbo soft-input soft-output (SISO) decoder. Our turbo SISO decoder is based on trace back algorithm (TBA) and saves area and power by replacing

Arslan, Tughrul

344

AgSec: Secure and Efficient CDMA-based Aggregation for Smart Metering Systems  

E-Print Network [OSTI]

AgSec: Secure and Efficient CDMA-based Aggregation for Smart Metering Systems Navid Alamatsaz-based data aggregation method provides access to all the data of all the smart meters in the root node, which in this case is the Utility Center, while keeping the smart metering data secure. The efficiency

Namboodiri, Vinod

345

Energy Efficient Radio Resource Management in a Coordinated Multi-Cell Distributed Antenna System  

E-Print Network [OSTI]

and two energy efficient radio resource management schemes are investigated; either ports can be switched - Distributed antenna systems, CoMP, HetNets, port selection, radio resource management, energy efficiency ports in LTE-A terminology). The rising energy costs and environmental concerns have led researchers

Yanikomeroglu, Halim

346

High Efficiency, Ultra-Low Emission, Integrated Process Heater System  

SciTech Connect (OSTI)

The team of TIAX LLC, ExxonMobil Research and Engineering Company, and Callidus Technologies, LLC conducted a six-year program to develop an ultra-low emission process heater burner and an advanced high efficiency heater design. This project addresses the critical need of process heater operators for reliable, economical emission reduction technologies to comply with stringent emission regulations, and for heater design alternatives that reduce process heater energy requirements without significant cost increase. The key project targets were NOx emissions of 10 ppm (@ 3% O2), and a heater thermal efficiency of 95 percent. The ultra low NOx burner was developed through a series of pilot-scale and field tests combined with computational fluid dynamic modeling to arrive at simultaneous low emissions and suitable flame shape and stability. Pilot scale tests were run at TIAX, at the 2 MMBtu/hr scale, and at Callidus at 8 MMBtu/hr. The full scale burner was installed on a 14 burner atmospheric pipestill furnace at an ExxonMobil refinery. A variety of burner configurations, gas tips and flame stabilizers were tested to determine the lowest emissions with acceptable flame shape and stability. The resulting NOx emissions were 22 ppm on average. Starting in 2001, Callidus commercialized the original ultra low NOx burner and made subsequent design improvements in a series of commercial burners evolving from the original concept and/or development. Emissions in the field with the ultra low-NOx burner over a broad spectrum of heater applications have varied from 5 ppm to 30 ppm depending on heater geometry, heater service, fuel and firing capacity. To date, 1550 of the original burners, and 2500 of subsequent generation burners have been sold by Callidus. The advanced heater design was developed by parametric evaluations of a variety of furnace and combustion air preheater configurations and technologies for enhancing convective and radiative heat transfer. The design evolution relied heavily on computational fluid dynamic predictions of design alternatives. The final design features modular separate radiant cells, each with one and two-side fired vertical tubes. The convection section configuration is vertical tube banks enclosed in the radiant channels. Commercial modular plate air preheaters are used. The predicted performance for the integrated advanced heater and Callidus burner is 95 percent efficiency with 9 ppm NOx emissions firing natural gas, and 12 ppm firing refinery gas. The total erected cost is less than a conventional heater with combustion air preheat.

Mason, Howard; Boral, Anindya; Chhotray, San; Martin, Matthew

2006-06-19T23:59:59.000Z

347

Demodulation circuit for AC motor current spectral analysis  

DOE Patents [OSTI]

A motor current analysis method for the remote, noninvasive inspection of electric motor-operated systems. Synchronous amplitude demodulation and phase demodulation circuits are used singly and in combination along with a frequency analyzer to produce improved spectral analysis of load-induced frequencies present in the electric current flowing in a motor-driven system.

Hendrix, Donald E. (Oak Ridge, TN); Smith, Stephen F. (Knoxville, TN)

1990-12-18T23:59:59.000Z

348

Nutrient use efficiency in bioenergy cropping systems: Critical research questions  

E-Print Network [OSTI]

x giganteus. Biomass Bioenergy 12:21-24. Christian, D.G. ,for-biofuels systems. Biomass Bioenergy Gentry, L.E. , F.E.cynosuroides. Biomass Bioenergy 12:419-428. Brejda, J.J.

Brouder, Sylvie; Volenec, Jeffrey J; Turco, Ronald; Smith, Douglas R; Ejeta, Gebisa

2009-01-01T23:59:59.000Z

349

Improving the Water Efficiency of Cooling Production System  

E-Print Network [OSTI]

For most of the time, cooling towers (CTs) of cooling systems operate under partial load conditions and by regulating the air circulation with a variable frequency drive (VFD), significant reduction in the fan power can be achieved. In Kuwait...

Maheshwari, G.; Al-Hadban, Y.; Al-Taqi, H. H.; Alasseri, R.

2010-01-01T23:59:59.000Z

350

Energy Efficient Scheduling for Real-Time Systems  

E-Print Network [OSTI]

, temperature awareness of a real-time system can be improved while considering variation of task execution times to reduce energy consumption. This thesis is established through research in a number of directions. First, we explore the applicability of Dynamic...

Gupta, Nikhil

2012-02-14T23:59:59.000Z

351

Dynamical systems in nanophotonics: From energy efficient modulators to light forces and optomechanics  

E-Print Network [OSTI]

We demonstrate novel device concepts based on rigorous design of the dynamics of resonant nanophotonic systems, such as dispersionless resonant switches and energy-efficient mo-dulator architectures, slow-light cells, and ...

Kaertner, Franz X.

352

Efficient error correction for speech systems using constrained re-recognition  

E-Print Network [OSTI]

Efficient error correction of recognition output is a major barrier in the adoption of speech interfaces. This thesis addresses this problem through a novel correction framework and user interface. The system uses constraints ...

Yu, Gregory T

2008-01-01T23:59:59.000Z

353

High-temperature microfluidic systems for thermally-efficient fuel processing  

E-Print Network [OSTI]

Miniaturized fuel cell systems have the potential to outperform batteries in powering a variety of portable electronics. The key to this technology is the ability to efficiently process an easily-stored, energy-dense fuel. ...

Arana, Leonel R

2003-01-01T23:59:59.000Z

354

Oxygen and Opacity Stack Emission Monitoring Systems To Optimize Combustion Efficiency and Meet EPA Requirements  

E-Print Network [OSTI]

monitoring systems. REFERENCES 1. KVB, Inc. Report to FEA, Contract No. C-04-50085-00. Assessment of the Potential for Energy Conservation through Improved Industrial Boiler Efficiency, Final Report, Volume I. 2. Everything you Need to Know About...

Molloy, R. C.

1980-01-01T23:59:59.000Z

355

Techniques for Maximizing Efficiency of Solar Energy Harvesting Systems (Invited Paper)  

E-Print Network [OSTI]

Techniques for Maximizing Efficiency of Solar Energy Harvesting Systems (Invited Paper) Pai H requiring battery replacement. This paper ex- amines technical issues with solar energy harvesting. First power point tracking, energy harvest- ing, solar panel, photovoltaic cell, supercapacitor, ultracapac

Shinozuka, Masanobu

356

Harnessing waste heat and reducing wasted lighting : three mechanical structures for efficient energy systems  

E-Print Network [OSTI]

This thesis presents three mechanical structures designed for efficient energy systems. In [3], Cooley presents a modification of a fluorescent lamp which allows it to detect nearby occupants and dim itself automatically. ...

Stronger, Brad A

2008-01-01T23:59:59.000Z

357

High-efficient solar power systems based on thermionic converter with small gap  

SciTech Connect (OSTI)

Various configurations of power systems based on thermionic converter with small interelectrode gap have been considered. The results of studies of systems energy characteristics are presented. The high efficiency and perspectivety of such systems for different applications have been shown. {copyright} {ital 1996 American Institute of Physics.}

Nikolaev, Y.V.; Eryomin, S.A.; Kalmykov, S.S.; Karpechenko, Y.D.; Kucherov, R.Y.; Lapochkin, N.V. [Research Institute of Scientific Industrial Association ``Lutch``, 142100, Podolsk, Moscow Region (Russian Federation)

1996-03-01T23:59:59.000Z

358

Associative Memories Provide an Efficient Control Mechanism for a Parallel Production System Architecture  

E-Print Network [OSTI]

Associative Memories Provide an Efficient Control Mechanism for a Parallel Production System a parallel architecture for production systems [2, 3, 5]. This novel architecture allows parallel production. The elimination of global synchronization in production systems was made possible by the use of serializability

Amaral, Jos茅 Nelson

359

Measured Performance of Energy-Efficient Computer Systems  

E-Print Network [OSTI]

climate. Recent surveys have shown that the use of personal computer systems in commercial office buildings is expanding rapidly. The energy consumption of such a growing end-use also has a significant impact on the total building power demand. In warmer...

Floyd, D. B.; Parker, D. S.

1996-01-01T23:59:59.000Z

360

High Efficiency Energy Conversion Systems for Liquid Nitrogen Automobiles  

E-Print Network [OSTI]

replacements over the lifetime of the vehicle raises the specter of increased heavy metal pollution, were lead environmental burden and, in particular, would avoid the issues of heavy metals pollution associated with Pb energy storage, particularly lead-acid and Ni-Cd batteries. These heavy metal energy storage systems

Laughlin, Robert B.

Note: This page contains sample records for the topic "motor systems efficiency" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

Improving Compressed Air System Efficiency- Know What You Really Need  

E-Print Network [OSTI]

($17,000/year saved) by reducing air use without reducing production. Another, by monitoring air production and energy requirements of the system, selected a properly sized 75 hp compressor to replace a worn-out 250 hp compressor and paid for the new...

Terrell, R. E.

362

Direct Digital Control in Air Conditioning Systems for Energy Efficiency  

E-Print Network [OSTI]

the function and the level of the building, but also save energy. At present, air-conditioning design in internal commercial buildings is becoming more complex and enormous. The proportion of air conditioning systems in the whole building is getting larger...

Liu, W.; Ye, A.; Li, D.

2006-01-01T23:59:59.000Z

363

Efficient Transaction Support for Dynamic Information Retrieval Systems  

E-Print Network [OSTI]

are on to integrate IR features with database manage颅 ment system (DBMS) features. However, initial research has revealed that DBMS features optimized for traditional databases, display degraded performance while are necessary for several DBMS fea颅 tures, transaction support being one of them. This paper focuses

Massachusetts at Amherst, University of

364

Commercial high efficiency dehumidification systems using heat pipes  

SciTech Connect (OSTI)

An improved heat pipe design using separately connected two-section one-way flow heat pipes with internal microgrooves instead of wicks is described. This design is now commercially available for use to increase the dehumidification capacity of air conditioning systems. The design also includes a method of introducing fresh air into buildings while recovering heat and controlling the humidity of the incoming air. Included are applications and case studies, load calculations and technical data, and installation, operation, and maintenance information.

Not Available

1993-09-01T23:59:59.000Z

365

Submersible canned motor transfer pump  

DOE Patents [OSTI]

A transfer pump is described which is used in a waste tank for transferring high-level radioactive liquid waste from a waste tank and having a column assembly, a canned electric motor means, and an impeller assembly with an upper impeller and a lower impeller connected to a shaft of a rotor assembly. The column assembly locates a motor housing with the electric motor means adjacent to the impeller assembly which creates an hydraulic head, and which forces the liquid waste, into the motor housing to cool the electric motor means and to cool and/or lubricate the radial and thrust bearing assemblies. Hard-on-hard bearing surfaces of the bearing assemblies and a ring assembly between the upper impeller and electric motor means grind large particles in the liquid waste flow. Slots in the static bearing member of the radial bearing assemblies further grind down the solid waste particles so that only particles smaller than the clearances in the system can pass there through, thereby resisting damage to and the interruption of the operation of the transfer pump. The column assembly is modular so that sections can be easily assembled, disassembled and/or removed. A second embodiment employs a stator jacket which provides an alternate means for cooling the electric motor means and lubricating and/or cooling the bearing assemblies, and a third embodiment employs a variable level suction device which allows liquid waste to be drawn into the transfer pump from varying and discrete levels in the waste tank. 17 figs.

Guardiani, R.F.; Pollick, R.D.; Nyilas, C.P.; Denmeade, T.J.

1997-08-19T23:59:59.000Z

366

Scalable and Energy Efficient Computer Systems - Energy Innovation Portal  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administrationcontroller systems controller systemsis aSecurity8Nuclearof EnergySawteeth

367

Scalable, Efficient Solid Waste Burner System - Energy Innovation Portal  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administrationcontroller systems controller systemsis aSecurity8Nuclearof EnergySawteethBiomass

368

Increased Engine Efficiency via Advancements in Engine Combustion Systems |  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-UpHeatMulti-Dimensionalthe U.S. Improving Fan SystemIna Shaw InaFederal

369

Energy Efficiency Improvement and Cost Saving Opportunities for the Petrochemical Industry - An ENERGY STAR(R) Guide for Energy and Plant Managers  

E-Print Network [OSTI]

and Underloaded Electric Motor. U.S. DOE, Washington, DC2002d). Optimizing Electric Motor Systems at A CorporateUnited States Industrial Electric Motor Systems Market

Neelis, Maarten

2008-01-01T23:59:59.000Z

370

Buildings Energy Efficiency Policy  

E-Print Network [OSTI]

Efficiency Wind Biomass Natural Gas Combined Cycle Nuclear Coal IGCC Photovoltaics Rangeof 路 Emphasized lighting 路 Insulation, HVAC, motors, windows also significant 路 Savings typically 1-10% per

Oak Ridge National Laboratory

371

Achieving A Long Term Business Impact by Improving the Energy Effectiveness and Reliability of Electric Motors  

E-Print Network [OSTI]

Over 100,000 electric motors drive the production equipment throughout a large chemical company. The energy-efficiency and reliability of these motors during their entire life have a decided impact on the company's manufacturing costs and production...

Whelan, C. D.

372

ALTERNATE HIGH EFFICIENCY PARTICULATE AIR (HEPA) FILTRATION SYSTEM  

SciTech Connect (OSTI)

In Phase IIA of this project, CeraMem has further developed and scaled up ceramic HEPA filters that are appropriate for use on filtration of vent gas from HLW tanks at DOE sites around the country. This work included procuring recrystallized SiC monoliths, developing membrane and cement materials, and defining a manufacturing process for the production of prototype full sizes HEPA filters. CeraMem has demonstrated that prototype full size filters can be manufactured by producing 9 full size filters that passed DOP aerosol testing at the Oak Ridge Filter Test Facility. One of these filters was supplied to the Savannah River Technical Center (SRTC) for process tests using simulated HLW tank waste. SRTC has reported that the filter was regenerable (with some increase in pressure drop) and that the filter retained its HEPA retention capability. CeraMem has also developed a Regenerable HEPA Filter System (RHFS) design and acceptance test plan that was reviewed by DOE personnel. The design and acceptance test plan form the basis of the system proposal for follow-on work in Phase IIB of this project.

Bruce Bishop; Robert Goldsmith; Karsten Nielsen; Phillip Paquette

2002-08-16T23:59:59.000Z

373

Summary of electric vehicle dc motor-controller tests  

SciTech Connect (OSTI)

Available performance data for production motors are usually of marginal value to the electric vehicle designer. To provide at least a partial remedy to this situation, tests of typical dc propulsion motors and controllers were conducted as part of the DOE Electric Vehicle Program. The objectives of this program were to evaluate the differences in the performance of dc motors when operating with chopper-type controllers and when operating on direct current; and to gain an understanding of the interactions between the motor and the controller which cause these differences. Toward this end, motor-controller tests performed by the NASA Lewis Research Center provided some of the first published data that quantified motor efficiency variations for both ripple-free (straight dc) and chopper modes of operation. Test and analysis work at the University of Pittsburgh explored motor-controller relationships in greater depth. And to provide additional data, 3E Vehicles tested two small motors, both on a dynamometer and in a vehicle, and the Eaton Corporation tested larger motors, using sophisticated instrumentation and digital processing techniques. All the motors tested were direct-current types. Of the separately excited types, seven were series wound and two were shunt wound. One self-excited permanent magnet type was also tested. Four of the series wound motors used brush shifting to obtain good commutation. In almost all cases, controller limitations constrained the test envelope so that the full capability of the motors could not be explored.

McBrien, E F; Tryon, H B

1982-09-01T23:59:59.000Z

374

Increasing efficiency of data mining systems by machine unification and double machine cache  

E-Print Network [OSTI]

Increasing efficiency of data mining systems by machine unification and double machine cache and in general data mining systems, we need to search through huge spaces of machine learn- ing algorithms. Meta-learning and other complex data mining approaches need to train and test thousands of learning machines while

Jankowski, Norbert

375

TRANSPORTATION SYSTEMS are the build-ing blocks of modern society. Efficient and  

E-Print Network [OSTI]

TRANSPORTATION SYSTEMS are the build- ing blocks of modern society. Efficient and safe movement. How- ever, transportation systems by their very nature also affect the environment through operations, construction, and maintenance of transportation facilities, and through the travel behaviors they encourage

Storici, Francesca

376

Survey of energy-efficient and power-proportional storage systems  

E-Print Network [OSTI]

Survey of energy-efficient and power-proportional storage systems Pablo Llopis, Javier Garcia Blas and challenges. Keywords: energy; storage; power-aware; power proportionality; data center; Green IT Received 20]. In fact, disks alone can contribute a significant fraction of energy, about 86% for storage systems [10

Isaila, Florin

377

IEEE TRANSACTIONS ON PARALLEL AND DISTRIBUTED SYSTEMS, MANUSCRIPT ID 1 Efficient Data Migration to Conserve Energy  

E-Print Network [OSTI]

to Conserve Energy in Streaming Media Storage Systems Yunpeng Chai, Zhihui Du, Member, IEEE, David A. Bader an important design issue for large-scale streaming media storage systems. Existing energy conservation contributes on extending the idle time of EESD to conserve more energy efficiently. Therefore, the EESDC

Bader, David A.

378

Using XML to Build Efficient Transaction-Time Temporal Database Systems on Relational Databases  

E-Print Network [OSTI]

(virtual) representations of the database history, (b) XQuery to express powerful temporal queriesUsing XML to Build Efficient Transaction-Time Temporal Database Systems on Relational Databases the ArchIS system that achieves full-functionality transaction-time databases without re- quiring temporal

Zaniolo, Carlo

379

HYBUD: An Energy-Efficient Architecture for Hybrid Parallel Disk Systems  

E-Print Network [OSTI]

consumption in parallel disk systems has strong impacts on the cost of backup power-generation and cooling consumption and cooling. Although flash memory is very energy- efficient compared to disk drives, flash memory but not limited to, video surveillance [1], remote-sensing database systems [2], and digital libraries [5

Qin, Xiao

380

EVITA: A Prototype System for Efficient Visualization and Interrogation of Terascale Datasets  

E-Print Network [OSTI]

EVITA: A Prototype System for Efficient Visualization and Interrogation of Terascale Datasets Raghu and visualization techniques has not kept pace with the growth in size and complexity of such datasets. To address datasets. The cornerstone of the EVITA system is a representational scheme that allows ranked access

Fowler, James E.

Note: This page contains sample records for the topic "motor systems efficiency" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

Studying the energy efficiency of large-scale computer systems requires models of the relationship  

E-Print Network [OSTI]

Abstract Studying the energy efficiency of large-scale computer systems requires models-node clusters using embedded, laptop, desktop, and server processors. These results demonstrate the need usage and power consumption. Therefore, a substantial body of literature models system-level power

Rivoire, Suzanne

382

Energy Efficient Single Stack Exhaust Fan Systems (E3S3F)  

E-Print Network [OSTI]

This paper first investigates the fan energy performance of a constant air volume exhaust system. Two single stack energy efficient exhaust fan systems (E3S3F) are presented. The E3S3F-I has the static pressure sensor located at the inlet...

Wang, G.; Liu, M.

2001-01-01T23:59:59.000Z

383

OBSERVE: Occupancy-Based System for Efficient Reduction of HVAC Energy  

E-Print Network [OSTI]

OBSERVE: Occupancy-Based System for Efficient Reduction of HVAC Energy Varick L. Erickson, Miguel 脕 & control General Terms Algorithms, Machine Learning, Measurement Keywords Occupancy, HVAC, Ventilation for heating, ventilation, and air-conditioning (HVAC) systems[2]. Studies suggest that 15% to 25% of HVAC

Carreira-Perpi帽谩n, Miguel 脕.

384

How to count efficiently all affine roots of a polynomial system \\Lambda  

E-Print Network [OSTI]

on the lifting of the artificial origins exist and can be derived dynamically, as described in sections 4, 5How to count efficiently all affine roots of a polynomial system \\Lambda Ioannis Z. Emiris y Jan system; how颅 ever, it has so far mostly dealt with roots having nonzero coordinates. We shift attention

Verschelde, Jan

385

High efficiency photovoltaic power conditioning system Hosam Sharabash, DVMM Krishna, Norbert Frhleke and Joachim Bcker  

E-Print Network [OSTI]

, Germany sharabash@lea.upb.de Abstract A new topology for photovoltaic Power Conditioning System (PCS, this redundant topol- ogy consists of two new components, one for DC/DC converter and one for inverter. The preHigh efficiency photovoltaic power conditioning system Hosam Sharabash, DVMM Krishna, Norbert

Paderborn, Universit盲t

386

An Efficient Intrusion Detection System Design Thomas Holz, Michael Meier, Hartmut Koenig  

E-Print Network [OSTI]

mechanisms (e.g. authentication, encryption, or access control) they provide an automatic detection1 An Efficient Intrusion Detection System Design Thomas Holz, Michael Meier, Hartmut Koenig Mail:{thh,mm,koenig}@informatik.tu-cottbus.de Abstract: Intrusion detection systems have proved

Meier, Michael

387

Efficiency of energy transfer in a light-harvesting system under quantum coherence  

E-Print Network [OSTI]

We investigate the role of quantum coherence in the efficiency of excitation transfer in a ring-hub arrangement of interacting two-level systems, mimicking a light-harvesting antenna connected to a reaction center as it is found in natural photosynthetic systems. By using a quantum jump approach, we demonstrate that in the presence of quantum coherent energy transfer and energetic disorder, the efficiency of excitation transfer from the antenna to the reaction center depends intimately on the quantum superposition properties of the initial state. In particular, we find that efficiency is sensitive to symmetric and asymmetric superposition of states in the basis of localized excitations, indicating that initial state properties can be used as a efficiency control parameter at low temperatures.

Alexandra Olaya-Castro; Chiu Fan Lee; Francesca Fassioli Olsen; Neil F. Johnson

2008-04-16T23:59:59.000Z

388

150,000 r/min-1.5 kW PM Efficiency Improvement by Means of Permeance Coefficient Optimization of 150,000-r/min, 1.5-kW PM Motor  

E-Print Network [OSTI]

Magnet Shaft Coil (Winding) gl ml 3 B-H Fig. 3. B-H curve of permanent magnet and operating point. 0. Configuration of ultra high-speed PM motor. Core Coil (Winding) Air Permanent Magnet Shaft Stator Air 2 FEM University of Technology) This paper describes an ultra high-speed permanent-magnet synchronous motor design

Fujimoto, Hiroshi

389

Nanocoatings for High-Efficiency Industrial and Tooling Systems  

SciTech Connect (OSTI)

This industry-driven project was the result of a successful response by Eaton Corporation to a DOE/ITP Program industry call. It consisted of three phases in which ORNL participated. In addition to Eaton Corporation and ORNL (CRADA), the project team included Ames Laboratory, who developed the underlying concept for aluminum-magnesium-boron based nanocomposite coatings [1], and Greenleaf, a small tooling manufacturer in western Pennsylvania. This report focuses on the portion of this work that was conducted by ORNL in a CRADA with Eaton Corporation. A comprehensive final report for the entire effort, which ended in September 2010, has been prepared by Eaton Corporation. Phase I, 揚roof of Concept ran for one year (September 1, 2006 to September 30, 2007) during which the applicability of AlMgB14 single-phase and nanocomposite coatings on hydraulic material coupons and components as well as on tool inserts was demonstrated.. The coating processes used either plasma laser deposition (PLD) or physical vapor deposition (PVD). During Phase I, ORNL conducted laboratory-scale pin-on-disk and reciprocating pin-on-flat tests of coatings produced by PLD and PVD. Non-coated M2 tool steel was used as a baseline for comparison, and the material for the sliding counterface was Type 52100 bearing steel since it simulated the pump materials. Initial tests were run mainly in a commercial hydraulic fluid named Mobil DTE-24, but some tests were later run in a water-glycol mixture as well. A tribosystem analysis was conducted to define the operating conditions of pump components and to help develop simulative tests in Phase II. Phase II, 揅oating Process Scale-up was intended to use scaled-up process to generate prototype parts. This involved both PLD practices at Ames Lab, and a PVD scale-up study at Eaton using its production capable equipment. There was also a limited scale-up study at Greenleaf for the tooling application. ORNL continued to conduct friction and wear tests on process variants and developed tests to better simulate the applications of interest. ORNL also employed existing lubrication models to better understand hydraulic pump frictional behavior and test results. Phase III, 揊unctional Testing focused on finalizing the strategy for commercialization of AlMgB14 coatings for both hydraulic and tooling systems. ORNL continued to provide tribology testing and analysis support for hydraulic pump applications. It included both laboratory-scale coupon testing and the analysis of friction and wear data from full component-level tests performed at Eaton Corp. Laboratory-scale tribology test methods are used to characterize the behavior of nanocomposite coatings prior to running them in full-sized hydraulic pumps. This task also includes developing tribosystems analyses, both to provide a better understanding of the performance of coated surfaces in alternate hydraulic fluids, and to help design useful laboratory protocols. Analysis also includes modeling the lubrication conditions and identifying the physical processes by which wear and friction of the contact interface changes over time. This final report summarizes ORNL抯 portion of the nanocomposite coatings development effort and presents both generated data and the analyses that were used in the course of this effort.

Blau, P; Qu, J.; Higdon, C. (Eaton Corporation)

2011-02-01T23:59:59.000Z

390

Solar tracker motor having a fixed caliper and a translating caliper each with an electromagnetic brake system  

DOE Patents [OSTI]

Concepts and technologies described herein provide for an accurate and cost-effective method for rotating a solar array disk for tracking the movement of the sun. According to various aspects, a motor includes a fixed caliper and a translating caliper positioned adjacent to one another. Electromagnetically controlled brakes on the translating caliper grip the solar array disk while adjacent, but spaced apart, electromagnets on the fixed caliper and the translating caliper are energized to create an attractive force that pulls the translating caliper with the solar array disk toward the fixed caliper. After reaching the fixed caliper, brakes on the fixed caliper are engaged with the disk, brakes on the translating caliper are released from the disk, and the translating caliper is pushed back to the starting location where the process repeats until the desired rotation is completed.

Rau, Scott James

2013-01-29T23:59:59.000Z

391

Reduced vibration motor winding arrangement  

DOE Patents [OSTI]

An individual phase winding arrangement having a sixty electrical degree phase belt width for use with a three phase motor armature includes a delta connected phase winding portion and a wye connected phase winding portion. Both the delta and wye connected phase winding portions have a thirty electrical degree phase belt width. The delta and wye connected phase winding portions are each formed from a preselected number of individual coils each formed, in turn, from an unequal number of electrical conductor turns in the approximate ratio of {radical}3. The individual coils of the delta and wye connected phase winding portions may either be connected in series or parallel. This arrangement provides an armature winding for a three phase motor which retains the benefits of the widely known and utilized thirty degree phase belt concept, including improved mmf waveform and fundamental distribution factor, with consequent reduced vibrations and improved efficiency. 4 figs.

Slavik, C.J.; Rhudy, R.G.; Bushman, R.E.

1997-11-11T23:59:59.000Z

392

High-speed electrical motor evaluation  

SciTech Connect (OSTI)

Under this task, MTI conducted a general review of state-of-the-art high-speed motors. The purpose of this review was to assess the operating parameters, limitations and performance of existing motor designs, and to establish commercial sources for a motor compatible with the requirements of the Brayton-cycle system. After the motor requirements were established, a list of motor types, manufacturers and designs capable of achieving the requisite performance was compiled. This list was based on an in-house evaluation of designs. Following the establishment of these options, a technical evaluation of the designs selected was conducted. In parallel with their evaluations, MTI focused on the establishment of commercial sources.

Not Available

1989-02-03T23:59:59.000Z

393

Energy Efficiency Improvement and Cost Saving Opportunities for Breweries: An ENERGY STAR(R) Guide for Energy and Plant Managers  

E-Print Network [OSTI]

energy consumption in hot water and steam distribution, hot water and steam generation, motors and motor systems, refrigeration

Galitsky, Christina; Martin, Nathan; Worrell, Ernst; Lehman, Bryan

2003-01-01T23:59:59.000Z

394

Solid State AC Motor Drives - Conservation Perspectives  

E-Print Network [OSTI]

This paper presents and discusses techniques for energy conservation by reducing losses in ac motor driven systems, proposed by the technical community in response to surging cost of energy. An important aspect considered is the impact on electric...

Mohan, N.; Ferraro, R. J.

1982-01-01T23:59:59.000Z

395

Influence of direct motor-motor interaction in models for cargo transport by a single team of motors  

E-Print Network [OSTI]

We analyze theoretically the effects of excluded-volume interactions between motors on the dynamics of a cargo driven by multiple motors. The model considered shares many commons with other recently proposed in the literature, with the addition of direct interaction between motors and motor back steps. The cargo is assumed to follow a continuum Langevin dynamics, while individual motors evolve following a Monte Carlo algorithm based on experimentally accessible probabilities for discrete forward and backward jumps, and attachment and detachment rates. The links between cargo and motors are considered as non linear springs. By means of numerical simulations we compute the relevant quantities characterizing the dynamical properties of the system, and we compare the results to those for non interacting motors. We find that interactions lead to quite relevant changes in the force-velocity relation for cargo, with a considerable reduction of the stall force, and cause also a notable decrease of the run length. These effects are mainly due to traffic-like phenomena in the microtubule. The consideration of several parallel tracks for motors reduces such effects. However, we find that for realistic values of the number of motors and the number of tracks, the influence of interactions on the global parameters of transport of cargo are far from being negligible. Our studies provide also an analysis of the relevance of motor back steps on the modeling, and of the influence of different assumptions for the detachment rates. In particular, we discuss these two aspects in connection with the possibility of observing processive back motion of cargo at large load forces.

Sebastian Bouzat; Fernando Falo

2010-12-14T23:59:59.000Z

396

Human Capacity Building in Energy Efficiency and Renewable Energy System Maintenance for the Yurok Tribe  

SciTech Connect (OSTI)

From July 2005 to July 2007, the Schatz Energy Research Center (SERC) assisted the Yurok Tribe in the implementation of a program designed to build the Tribe抯 own capacity to improve energy efficiency and maintain and repair renewable energy systems in Tribal homes on the Yurok Reservation. Funding for this effort was provided by the U.S. Department of Energy抯 Tribal Program under First Steps grant award #DE-FG36-05GO15166. The program抯 centerpiece was a house-by-house needs assessment, in which Tribal staff visited and conducted energy audits at over fifty homes. The visits included assessment of household energy efficiency and condition of existing renewable energy systems. Staff also provided energy education to residents, evaluated potential sites for new household renewable energy systems, and performed minor repairs as needed on renewable energy systems.

Engel, R. A.' Zoellick, J J.

2007-07-31T23:59:59.000Z

397

Improving Charging Efficiency with Workload Scheduling in Energy Harvesting Embedded Systems  

E-Print Network [OSTI]

University Syracuse, New York, 13244, USA {yzhan158, yage, qiqiu}@syr.edu ABSTRACT In energy harvestingImproving Charging Efficiency with Workload Scheduling in Energy Harvesting Embedded Systems Yukan in the electrical energy storage (EES) bank. How much energy can be stored is affected by many factors including

Qiu, Qinru

398

Improved Power Grid Stability and Efficiency with a Building-Energy Cyber-Physical System  

E-Print Network [OSTI]

, or for sporadic reasons, for example a power plant goes offline unexpectedly (e.g., due to an earthquake or stagnant winds to propel wind turbines). Dur- ing an episode, the power grid operators must contend1 Improved Power Grid Stability and Efficiency with a Building-Energy Cyber-Physical System Mary

399

Design and global optimization of high-efficiency solar thermal systems  

E-Print Network [OSTI]

Design and global optimization of high-efficiency solar thermal systems with tungsten cermets David, Massachusetts 02139, USA bermel@mit.edu Abstract: Solar thermal, thermoelectric, and thermophotovoltaic (TPV by selective solar absorbers and TPV selective emitters. To improve these critical components, we study a class

Solja猫i忙, Marin

400

PRE-BUD: Prefetching for Energy-Efficient Parallel I/O Systems with Buffer Disks  

E-Print Network [OSTI]

of the total cost of ownership [Pinheiro and Bianchini 2004; Wang et al. 2008; Xie 2008]. Reducing the energy configuration is more cost-effective and energy-efficient than the first one. Finally, we quantitatively compare that PRE-BUD is able to reduce energy dissipation in parallel disk systems by up to 50 percent when

Qin, Xiao

Note: This page contains sample records for the topic "motor systems efficiency" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

Cilk: An Efficient Multithreaded Runtime System Robert D. Blumofe Christopher F. Joerg Bradley C. Kuszmaul  

E-Print Network [OSTI]

Cilk: An Efficient Multithreaded Runtime System Robert D. Blumofe Christopher F. Joerg Bradley C. Kuszmaul Charles E. Leiserson Keith H. Randall Yuli Zhou MIT Laboratory for Computer Science 545 Technology Fellowship. Keith Randall is supported in part by a Department of Defense NDSEG Fellowship. To appear

Cappello, Peter

402

Charge Migration Efficiency Optimization in Hybrid Electrical Energy Storage (HEES) Systems  

E-Print Network [OSTI]

Charge Migration Efficiency Optimization in Hybrid Electrical Energy Storage (HEES) Systems the excessive electric energy in the electrical energy storage (EES) rather than converting into a different) are typically not balanced with each other. Storage of excessive en- ergy and compensation of the energy

Pedram, Massoud

403

Energy Aware Paradigm for Energy Efficient ICT: a Systemic Approach Sergio Ricciardi  

E-Print Network [OSTI]

(Green House Gases) emissions [1]. Thus, the reduction and optimization of energy consumption are arising and green energy use in network infrastructure with the dual objective of minimizing energy consumptionEnergy Aware Paradigm for Energy Efficient ICT: a Systemic Approach Sergio Ricciardi Technical

Polit猫cnica de Catalunya, Universitat

404

Determining Electric Motor Load and Efficiency  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-UpHeat Pump Models |Conduct, Parent Company AgreesDesiree Pipkins

405

Buying an Energy-Efficient Electric Motor  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-Up fromDepartmentTie Ltd:June 2015 < prevBuildingBusiness OpportunityofFEMPBUYING AN

406

When to Purchase Premium Efficiency Motors  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustion |Energy Usage 禄of| Department ofDepartment ofAnnouncement |Renewableisto Purchase Premium

407

Higher Efficiency HVAC Motors | Department of Energy  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-UpHeatMulti-Dimensional Subject:Ground HawaiiWaste Heat Recovery:| Department of|a d

408

Avoid Nuisance Tripping with Premium Efficiency Motors  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-Up fromDepartmentTie Ltd: Scope ChangeL-01-06 AuditAugustAviation ProfessionalAvoid

409

Black Hills Power- Commercial Energy Efficiency Programs  

Broader source: Energy.gov [DOE]

Black Hills Power provides rebates for its commercial customers who install energy efficient heat pumps, motors, variable frequency drives, lighting, and water heaters. Custom rebates for approved...

410

Comparative Analysis of Control Techniques for Efficiency Improvement in Electric Vehicles  

E-Print Network [OSTI]

-SVM scheme is the best candidate. Keywords--Electric vehicle, induction motor, efficiency, field oriented. In fact, the motor drive, comprising of the electric motor, power converter, and electronic controller by the driver. Many researches [2-3] have demonstrated the induction motor is one of the right electric motor

411

ECOS: An Energy-Efficient Cluster Storage System Xiaojun Ruan, Shu Yin, Adam Manzanares, Jiong Xie, Zhiyang Ding,  

E-Print Network [OSTI]

ECOS: An Energy-Efficient Cluster Storage System Xiaojun Ruan, Shu Yin, Adam Manzanares, Jiong Xie--Cluster storage systems are essential building blocks for many high-end computing infrastructures. Although energy, improving energy efficiency of cluster storage systems remains an open issue. To address this problem, we

Qin, Xiao

412

Hybrid vehicle motor alignment  

DOE Patents [OSTI]

A rotor of an electric motor for a motor vehicle is aligned to an axis of rotation for a crankshaft of an internal combustion engine having an internal combustion engine and an electric motor. A locator is provided on the crankshaft, a piloting tool is located radially by the first locator to the crankshaft. A stator of the electric motor is aligned to a second locator provided on the piloting tool. The stator is secured to the engine block. The rotor is aligned to the crankshaft and secured thereto.

Levin, Michael Benjamin (Ann Arbor, MI)

2001-07-03T23:59:59.000Z

413

Center for Power Electronics Systems CENTER PROGRAM SNAPSHOT  

E-Print Network [OSTI]

Research OVERVIEW: Engineered Systems Integrated Motor Drive Systems Power Distribution Systems Sustainable for Power Electron- ics Systems (CPES) are working to make electric power processing more efficient and more electricity to the next step and develop power processing systems of the highest value to society. A SYSTEMS

Beex, A. A. "Louis"

414

the 4th Power Electronics, Drive Systems & Technologies Conference, PEDSTC 2013 Simultaneous Sensing cum Actuating DC Motor  

E-Print Network [OSTI]

in this field have led to innovations in medical equipment, wind generation, aircraft systems, and numerous

Boyer, Edmond

415

Estimate of Cost-Effective Potential for Minimum Efficiency Performance Standards in 13 Major World Economies Energy Savings, Environmental and Financial Impacts  

E-Print Network [OSTI]

Initiative, IEA Electric Motor Systems Workshop, Paris. BV,Electric Motors ..X X X X X X X X X X X Electric Motors AC = air conditioning;

Letschert, Virginie E.

2013-01-01T23:59:59.000Z

416

Energy Efficiency Improvement and Cost Saving Opportunities for the U.S. Iron and Steel Industry An ENERGY STAR(R) Guide for Energy and Plant Managers  

E-Print Network [OSTI]

Improvements in Electric Motors and Drives, Berlin, Germany:Oversized and Underloaded Electric Motor. U.S. Department of2002b). Optimizing Electric Motor Systems at A Corporate

Worrell, Ernst

2011-01-01T23:59:59.000Z

417

Title: Designing Energy-Efficient Information Processing Systems Abstract: The semiconductor industry is facing some extraordinary challenges, including process and  

E-Print Network [OSTI]

Title: Designing Energy-Efficient Information Processing Systems Abstract: The semiconductor than 450 papers, and received six Conference and two IEEE Transactions Best Paper awards for their work

418

Assessing the Impact of Measurement Policy on the Accuracy of Certified Energy Efficiency Ratio for Split-System Air Conditioners  

E-Print Network [OSTI]

Efficiency of Unitary Air Conditioners and Heat Pumps,and Validation of Unitary Air Conditioner and Heat PumpC.W. (1994). Room Air Conditioner System Modeling, Air

Yu, Bingyi

2013-01-01T23:59:59.000Z

419

Lithographically Patterned Channels Spatially Segregate Kinesin Motor  

E-Print Network [OSTI]

* Departments of Bioengineering and Electrical Engineering and Materials Research Institute, The Pennsyl and transporting material at nanoscale dimensions, there is considerable interest in harnessing motor proteins), cumulative forces on the order of nN per 碌m2 are theoretically possible. The size, efficiency, and potential

Hancock, William O.

420

Development of a high power density motor for aircraft propulsion  

E-Print Network [OSTI]

are currently powered by heavy gas turbine engines that require fueling. The development of electric motors to replace gas turbines would be a big step towards accomplishing more efficient aircraft propulsion. The primary objective of this research extends...

Dibua, Imoukhuede Tim Odion

2007-04-25T23:59:59.000Z

Note: This page contains sample records for the topic "motor systems efficiency" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

Cost-Effective Design of a Hybrid Electrical Energy Storage System for Electric Vehicles  

E-Print Network [OSTI]

] whereas the efficiency of an electric motor can reach 90% or even higher [13], and (ii) the kinetic energy% in the case of heavy city traffic [17]. As the only source of providing energy to the electric motor.g., in Tesla cars, Nissan Leaf, Ford Focus, etc.). The performance of the EES system in an EV is therefore

Pedram, Massoud

422

IEEE TRANSACTIONS ON POWER SYSTEMS, VOL. 25, NO. 4, NOVEMBER 2010 1865 Impact of Energy Efficiency Incentives  

E-Print Network [OSTI]

IEEE TRANSACTIONS ON POWER SYSTEMS, VOL. 25, NO. 4, NOVEMBER 2010 1865 Impact of Energy Efficiency the implementation of energy efficiency poli- cies on the power distribution sector. To assess the outcome different energy efficiency levels required by the regulator. The results reveal that the introduction

Catholic University of Chile (Universidad Cat贸lica de Chile)

423

A Loss-Minimization DTC Scheme for EV Induction Motors A. Haddoun1  

E-Print Network [OSTI]

of an induction motor propelling and Electric Vehicle (EV). The proposed control strategy, based on a Direct Flux, among EV's motor electric propulsion features; the energy efficiency is a basic characteristic and the performance of the proposed control approach. Index Terms--Electric vehicle, induction motor, DTC, loss

Paris-Sud XI, Universit茅 de

424

Matrix Product State and mean field solutions for one-dimensional systems can be found efficiently  

E-Print Network [OSTI]

We consider the problem of approximating ground states of one-dimensional quantum systems within the two most common variational ansatzes, namely the mean field ansatz and Matrix Product States. We show that both for mean field and for Matrix Product States of fixed bond dimension, the optimal solutions can be found in a way which is provably efficient (i.e., scales polynomially). This implies that the corresponding variational methods can be in principle recast in a way which scales provably polynomially. Moreover, our findings imply that ground states of one-dimensional commuting Hamiltonians can be found efficiently.

Norbert Schuch; J. Ignacio Cirac

2010-07-19T23:59:59.000Z

425

Dynamic neutron scattering on incoherent systems using efficient resonance spin flip techniques  

SciTech Connect (OSTI)

We have performed numerical ray-tracing Monte-Carlo-simulations of incoherent dynamic neutron scattering experiments. We intend to optimize the efficiency of incoherent measurements depending on the fraction of neutrons scattered without and with spin flip at the sample. In addition to conventional spin echo, we have numerically and experimentally studied oscillating intensity techniques. The results point out the advantages of these different spin echo variants and are an important prerequisite for neutron resonance spin echo instruments like RESEDA (FRM II, Munich), to choose the most efficient technique depending on the scattering vector range and the properties of the sample system under study.

H鋟ssler, Wolfgang [Heinz Maier-Leibnitz Zentrum, Technische Universit鋞 M黱chen, D-85748 Garching, Germany and Physik-Department E21, Technische Universit鋞 M黱chen, D-85748 Garching (Germany); Kredler, Lukas [Physik-Department E21, Technische Universit鋞 M黱chen, D-85748 Garching (Germany)

2014-05-15T23:59:59.000Z

426

Extended Constant Power Speed Range of the Brushless DC Motor Through Dual Mode Inverter Control  

SciTech Connect (OSTI)

The trapezoidal back electromotive force (emf) brushless direct current (dc) motor (BDCM) with surface-mounted magnets has high-power density and efficiency especially when rare-earth magnet materials are used. Traction applications, such as electric vehicles, could benefit significantly from the use of such motors. Unfortunately, a practical means for driving the motor over a constant power speed ratio (CPSR) of 5:1 or more has not yet been developed. A key feature of these motors is that they have low internal inductance. The phase advance method is effective in controlling the motor power over such a speed range, but the current at high speed may be several times greater than that required at the base speed. The increase in current during high-speed operation is due to the low motor inductance and the action of the bypass diodes of the inverter. The use of such a control would require increased current rating of the inverter semiconductors and additional cooling for the inverter, where the conduction losses increase proportionally with current, and especially for the motor, where the losses increase with the square of the current. The high current problems of phase advance can be mitigated by adding series inductance; however, this reduces power density, requires significant increase in supply voltage, and leaves the CPSR performance of the system highly sensitive to variations in the available voltage. A new inverter topology and control scheme has been developed that can drive low-inductance BDCMs over the CPSR that would be required in electric vehicle applications. This new controller is called the dual-mode inverter control (DMIC). It is shown that the BDCM has an infinite CPSR when it is driven by the DMIC.

Lawler, J.S.

2000-06-23T23:59:59.000Z

427

Linking home energy rating systems with energy efficiency financing: Progress on national and state programs  

SciTech Connect (OSTI)

In 1991 and early 1992, the U.S. Department of Energy (DOE), in cooperation with the U.S. Department of Housing and Urban Development (HUD), established a National Collaborative on Home Energy Rating Systems (HERS) and Energy Efficient Mortgages (EEMs). The Collaborative's purpose was to involve stakeholders at a national policy level to develop a plan leading the nation toward a voluntary system linking HERS with EEMs. The National Renewable Energy Laboratory (NREL) coordinated the National Collaborative's meetings for DOE. Composed of representatives from 25 stakeholder organizations, the Collaborative, after some 14 meetings, reached consensus on two documents, both published by NREL in mg 1992: A National Program for Energy-Efficient Mortgages and Home Energy Rating Systems: A Blueprint for Action and Going National with HERS and EEMs: Issues and Impacts, The Collected Papers of the National Collaborative.

Farhar, B.C.; Collins, N.E.; Walsh, R.W.

1996-10-01T23:59:59.000Z

428

HIGH EFFICIENCY, LOW EMISSIONS, SOLID OXIDE FUEL CELL SYSTEMS FOR MULTIPLE APPLICATIONS  

SciTech Connect (OSTI)

Technology Management Inc. (TMI), teamed with the Ohio Office of Energy Efficiency and Renewable Energy, has engineered, constructed, and demonstrated a stationary, low power, multi-module solid oxide fuel cell (SOFC) prototype system operating on propane and natural gas. Under Phase I, TMI successfully operated two systems in parallel, in conjunction with a single DC-AC inverter and battery bus, and produced net AC electricity. Phase II testing expanded to include alternative and renewable fuels typically available in rural regions of Ohio. The commercial system is expected to have ultra-low pollution, high efficiency, and low noise. The TMI SOFC uses a solid ceramic electrolyte operating at high temperature (800-1000 C) which electrochemically converts gaseous fuels (hydrogen or mixed gases) and oxygen into electricity. The TMI system design oxidizes fuel primarily via electrochemical reactions and uses no burners (which pollute and consume fuel)--resulting in extremely clean exhaust. The use of proprietary sulfur tolerant materials developed by TMI allows system operation without additional fuel pre-processing or sulfur removal. Further, the combination of high operating temperatures and solid state operation increases the potential for higher reliability and efficiencies compared to other types of fuel cells. Applications for the TMI SOFC system cover a wide range of transportation, building, industrial, and military market sectors. A generic technology, fuel cells have the potential to be embodied into multiple products specific to Department of Energy (DOE) Office of Energy Efficiency and Renewable Energy (EERE) program areas including: Fuel Cells and Microturbines, School Buildings, Transportation, and Bioenergy. This program focused on low power stationary applications using a multi-module system operating on a range of common fuels. By producing clean electricity more efficiently (thus using less fuel), fuel cells have the triple effect of cleaning up the environment, reducing the amount of fuel consumed and, for energy intensive manufacturers, boosting their profits (by reducing energy expenses). Compared to conventional power generation technologies such as internal combustion engines, gas turbines, and coal plants, fuel cells are extremely clean and more efficient, particularly at smaller scales.

Sara Ward; Michael A. Petrik

2004-07-28T23:59:59.000Z

429

Developing Information on Energy Savings and Associated Costs and Benefits of Energy Efficient Emerging Technologies Applicable in California  

E-Print Network [OSTI]

in California. Efficiency improvements in electric motorpossible energy efficiency gains in electric motors. Table聽Motor Efficiency Improvement by Magnetically Coupled Adjustable Speed Drives (MC-ASD) One of the largest shares of industrial electric

Xu, Tengfang

2011-01-01T23:59:59.000Z

430

Products of motor burnout. Final report  

SciTech Connect (OSTI)

The Montreal Protocol of 1987 effectively banned a long list of chlorofluorocarbons (CFCs) traditionally used in air conditioning and refrigeration applications. The refrigeration and air conditioning industries have responded by developing and testing new, alternative refrigerants that are less damaging to the atmosphere upon release. Despite a reputation for quality and reliability, air conditioning systems do occasionally fail. One of the more common failure modes in a hermetic system is a motor burnout. Motor burnouts can occur by various mechanisms. One of the most common scenarios is a locked motor rotor, which may result from a damaged bearing. The resulting electrical motor burnout is caused by overheating of the locked rotor and subsequent failure of the insulation. This is primarily a thermal breakdown process.

Hawley-Fedder, R.; Goerz, D.; Koester, C.; Wilson, M.

1996-03-30T23:59:59.000Z

431

Improving Energy Efficiency of Compressed Air System Based on System Audit  

E-Print Network [OSTI]

50 compressed air system energy audits completed by Shanghai50 compressed air system energy audits completed by Shanghaiof compressed air energy audits conducted by the Shanghai

Shanghai, Hongbo Qin; McKane, Aimee

2008-01-01T23:59:59.000Z

432

Motor Vehicle Record Procedure Objective  

E-Print Network [OSTI]

Motor Vehicle Record Procedure Objective Outline the procedure for obtaining motor vehicle record (MVR) through Fleet Services. Vehicle Operator Policy 3. Operators with 7 or more points on their motor vehicle record

Kirschner, Denise

433

Development of a solar receiver for a high-efficiency thermionic/thermoelectric conversion system  

SciTech Connect (OSTI)

Solar energy is one of the most promising energy resources on Earth and in space, because it is clean and inexhaustible. Therefore, we have been developing a solar-powered high-efficiency thermionic-thermoelectric conversion system which combines a thermionic converter (TIC) with a thermoelectric converter (TEC) to use thermal energy efficiently and to achieve high efficiency conversion. The TIC emitter must uniformly heat up to 1800 K. The TIC emitter can be heated using thermal radiation from a solar receiver maintained at a high temperature by concentrated solar irradiation. A cylindrical cavity-type solar receiver constructed from graphite was designed and heated in a vacuum by using the solar concentrator at Tohoku University. The maximum temperature of the solar receiver enclosed by a molybdenum cup reached 1965 K, which was sufficiently high to heat a TIC emitter using thermal radiation from the receiver. 4 refs., 6 figs., 1 tab.

Naito, H.; Kohsaka, Y.; Cooke, D.; Arashi, H. [Tohoku Univ., Aramaki (Japan)] [Tohoku Univ., Aramaki (Japan)

1996-10-01T23:59:59.000Z

434

Efficient fourth order symplectic integrators for near-harmonic separable Hamiltonian systems  

E-Print Network [OSTI]

Efficient fourth order symplectic integrators are proposed for numerical integration of separable Hamiltonian systems H(p,q)=T(p)+V(q). Symmetric splitting coefficients with five to nine stages are obtained by higher order decomposition of the simple harmonic oscillator. The performance of the methods is evaluated for various Hamiltonian systems: Integration errors are compared to those of acclaimed integrators composed by S. Blanes et al. (2013), W. Kahan et al. (1999) and H. Yoshida (1990). Numerical tests indicate that the integrators obtained in this paper perform significantly better than previous integrators for common Hamiltonian systems.

Nielsen, Kristian Mads Egeris

2015-01-01T23:59:59.000Z

435

Efficient fourth order symplectic integrators for near-harmonic separable Hamiltonian systems  

E-Print Network [OSTI]

Efficient fourth order symplectic integrators are proposed for numerical integration of separable Hamiltonian systems H(p,q)=T(p)+V(q). Symmetric splitting coefficients with five to nine stages are obtained by higher order decomposition of the simple harmonic oscillator. The performance of the methods is evaluated for various Hamiltonian systems: Integration errors are compared to those of acclaimed integrators composed by S. Blanes et al. (2013), W. Kahan et al. (1999) and H. Yoshida (1990). Numerical tests indicate that the integrators obtained in this paper perform significantly better than previous integrators for common Hamiltonian systems.

Kristian Mads Egeris Nielsen

2015-02-09T23:59:59.000Z

436

Research and development of highly energy-efficient supermarket refrigeration systems. Volume 2. Supplemental laboratory testing  

SciTech Connect (OSTI)

The Supermarket Refrigeration System project was structured to investigate and develop a new, highly energy-efficient supermarket refrigeration system which features unequal, parallel compressors, microprocessor suction pressure control, and floating head pressure control. Energy savings are achieved because such a system is better able to match compressor capacity with the required refrigeration load. For this same reason, the unequal, parallel compressor system can operate at the lowest possible condenser pressure. The combined effect of highest possible suction pressure and lowest possible condensing pressure substantially increases the energy efficiency ratio (EER) of the refrigeration system. The test conditions included winter and spring ambient temperatures ranging from 8/sup 0/ to 70/sup 0/F, refrigerants R-12 and R-502 with corresponding evaporator temperatures of 20/sup 0/ and -20/sup 0/F, respectively, and variable refrigeration loads between 100,000 and 170,000 Btu/hr. Heat reclaim tests were performed with R-12 only. For the three sets of tests performed, R-12, R-12 with heat reclaim, and R-502, the highest system EER was achieved when the unequal, parallel compressor system was operated with microprocessor control and floating head control.

Toscano, W.M.; Walker, D.H.; Tetreault, R.D.

1983-06-01T23:59:59.000Z

437

Control of Surface Mounted Permanent Magnet Motors with Special Application to Fractional-Slot Motors with Concentrated Windings  

SciTech Connect (OSTI)

A 30 pole, 6 kW, and 6000 maximum revolutions per minute (rpm) prototype of the permanent magnet synchronous motor (PMSM) with fractional-slot concentrated windings (FSCW) has been designed, built, and tested at the University of Wisconsin at Madison (UWM). This machine has significantly more inductance than that of regular PMSMs. The prototype was delivered in April 2006 to the Oak Ridge National Laboratory (ORNL) for testing and development of a controller that will achieve maximum efficiency. In advance of the test/control development effort, ORNL has used the PMSM models developed over a number of previous studies to study how steady state performance of high inductance PMSM machines relates to control issues. This report documents the results of this research. The amount of inductance that enables the motor to achieve infinite constant power speed ratio (CPSR) is given by L{sub {infinity}} = E{sub b}/{Omega}{sub b}I{sub R}, where E{sub b} is the root-mean square (rms) magnitude of the line-to-neutral back-electromotive force (emf) at base speed, {Omega}{sub b} is the base speed in electrical radians per second, and I{sub R} is the rms current rating of the motor windings. The prototype machine that was delivered to ORNL has about 1.5 times as much inductance as a typical PMSM with distributed integral slot windings. The inventors of the FSCW method, who designed the prototype machine, remarked that they were 'too successful' in incorporating inductance into their machine and that steps would be taken to modify the design methodology to reduce the inductance to the optimum value. This study shows a significant advantage of having the higher inductance rather than the optimal value because it enables the motor to develop the required power at lower current thereby reducing motor and inverter losses and improving efficiency. The main problem found with high inductance machines driven by a conventional phase advance (CPA) method is that the motor current at high speed depends solely on machine parameters and is virtually independent of the load level and the direct current (dc) supply voltage. Thus, the motor current is virtually the same at no load as at full load resulting in poor efficiency at less than full load conditions. While an inductance higher than the value cited above is warranted, it still does not ensure that the motor current is proportional to load; consequently, the problem of low efficiency at high speed and partial load is not resolved but is only mitigated. A common definition of 'base speed' is the speed at which the voltage applied to the motor armature is equal to the magnitude of the back-emf. The results in this study indicate that the dc supply voltage should be adequate to drive rated current into the motor winding at the specified base speed. At a minimum this requires sufficient voltage to overcome not only the back-emf but also the voltage drop across the internal impedance of the machine. For a high inductance PMSM, the internal impedance at base speed can be considerable and substantial additional voltage is required to overcome the internal voltage drop. It is further shown that even more voltage than the minimum required for injecting rated current at base speed can be beneficial by allowing the required power to be developed at lower current, which reduces losses in the motor and inverter components. Further, it is shown that the current is minimized at a unique speed; consequently, there may be room for optimization if the drive spends a substantial amount of its operating life at a certain speed (for example 60 mph). In this study, fundamental frequency phasor models are developed for a synchronous PMSM and the control systems that drive them is CPA. The models were compared with detailed simulations to show their validity. The result was used to design a traction drive control system with optimized efficiency to drive the fractional-slot motor with concentrated windings. The goal is to meet or exceed the FreedomCAR inverter cost and performance targets.

McKeever, John W [ORNL; Patil, Niranjan [University of Tennessee, Knoxville (UTK); Lawler, Jack [ORNL

2007-07-01T23:59:59.000Z

438

Analysis of space heating and domestic hot water systems for energy-efficient residential buildings  

SciTech Connect (OSTI)

An analysis of the best ways of meeting the space heating and domestic hot water (DHW) needs of new energy-efficient houses with very low requirements for space heat is provided. The DHW load is about equal to the space heating load in such houses in northern climates. The equipment options which should be considered are discussed, including new equipment recently introduced in the market. It is concluded that the first consideration in selecting systems for energy-efficient houses should be identification of the air moving needs of the house for heat distribution, heat storage, ventilation, and ventilative cooling. This is followed, in order, by selection of the most appropriate distribution system, the heating appliances and controls, and the preferred energy source, gas, oil, or electricity.

Dennehy, G

1983-04-01T23:59:59.000Z

439

Contol of integrated mechanical dehumidification and passive cooling systems to produce energy efficient comfort  

SciTech Connect (OSTI)

Detailed computer simulations validated by full scale testing indicate that roof pond type passive cooling systems can provide acceptable residential temperature conditions in all climates of the United States. Passive cooling systems as presently conceived, however, require complementary dehumidification to carry existing latent loads. A study is made of the relative dehumidification efficiencies of conventional air conditioners and an improved mechanical dehumidifier which utilizes sensible cooling recovery. The effects of dew point and dry bulb temperatures, controller set point and humidity band width, infiltration, and climate are evaluated. A simple dehumidifier sizing procedure is presented. Results indicate that the improved dehumidifiers are several times as efficient as conventional air conditioners under desired steady state room conditions. It is also shown that dehumidifier capacities at AHAM test conditions may be misleading if used for design purposes.

Doderer, E.; Marcus, D.; Hoffner, J.

1982-01-01T23:59:59.000Z

440

Overview of existing residential energy-efficiency rating systems and measuring tools  

SciTech Connect (OSTI)

Three categories of rating systems/tools were identified: prescriptive, calculational, and performance. Prescriptive systems include rating systems that assign points to various conservation features. Most systems that have been implemented to date have been prescriptive systems. The vast majority of these are investor-owned utility programs affiliated with the National Energy Watch program of the Edison Electric Institute. The calculational category includes computational tools that can be used to estimate energy consumption. This estimate could then be transformed, probably by indexing, into a rating. The available computational tools range from very simple to complex tools requiring use of a main-frame computer. Performance systems refer to residential energy-efficiency ratings that are based on past fuel consumption of a home. There are few of these systems. For each identified system/tool, the name, address, and telephone number of the developer is included. In addition, relevant publications discussing the system/tool are cited. The extent of field validation/verification of individual systems and tools is discussed. In general, there has been little validation/verification done. A bibliography of literature relevant to the use and implementation of a home energy rating system is also included.

Hendrickson, P.L.; Garrett-Price, B.A.; Williams, T.A.

1982-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "motor systems efficiency" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

Comparison of energy efficiency between variable refrigerant flow systems and ground source heat pump systems  

E-Print Network [OSTI]

tool for geothermal water loop heat pump systems, 9thInternational IEA Heat Pump Conference, Z黵ich, Switzerland,Performance of ground source heat pump system in a near-zero

Hong, Tainzhen

2010-01-01T23:59:59.000Z

442

Monitoring System Used to Optimize Compressed Air System Efficiency, Cut Costs  

E-Print Network [OSTI]

In 1994, Thomson Consumer Electronics (RCA), an international manufacturer of electronics equipment purchased a UtillTRACK Monitoring System for a plant in Indianapolis, Indiana. The system monitored gas and electric meters, substations, main...

Holmes, W. A.

443

Energy Efficiency Challenges in Heating Supply System of Turkmenistan and Potential Solutions  

E-Print Network [OSTI]

ENERGY EFFICICNECY CHALLENGES IN HEATING SUPPLY SYSTEM OF TURKMENISTAN AND POTENTIAL SOLUTIONS Arslanmurat Zomov Researcher Ashgabat, Turkmenistan Rainer Behnke Team leader MVV decon GMbH Berlin... efficient equipment and high quality material. A low level of automation has to be recognized. The current problems of heat supply in Turkmenistan can be solved only by a long term strategy. Therefore, a master plan has to indicate the development...

Zomov, A.; Behnke, R.

2010-01-01T23:59:59.000Z

444

Pilot States Program report: Home energy ratings systems and energy-efficient mortgages  

SciTech Connect (OSTI)

This report covers the accomplishments of the home energy ratings systems/energy-efficient mortgages (HERS/EEMs) pilot states from 1993 through 1998, including such indicators as funding, ratings and EEMs achieved, active raters, and training and marketing activities. A brief description of each HERS program's evolution is included, as well as their directors' views of the programs' future prospects. Finally, an analysis is provided of successful HERS program characteristics and factors that appear to contribute to HERS program success.

Farhar, B.

2000-04-04T23:59:59.000Z

445

Evaluation of Retrofit Variable-Speed Furnace Fan Motors  

SciTech Connect (OSTI)

In conjunction with the New York State Energy Research and Development Authority (NYSERDA) and Proctor Engineering Group, Ltd. (PEG), the Consortium for Advanced Residential Buildings (CARB) has evaluated the Concept 3 (tm) replacement motors for residential furnaces. These brushless, permanent magnet (BPM) motors can use much less electricity than their PSC (permanent split capacitor) predecessors. This evaluation focuses on existing homes in the heating-dominated climate of upstate New York with the goals of characterizing field performance and cost-effectiveness. The results of this study are intended to be useful to home performance contractors, HVAC contractors, and home efficiency program stakeholders. The project includes eight homes in and near Syracuse, NY. Tests and monitoring was performed both before and after fan motors were replaced. Average fan power reductions were approximately 126 Watts during heating and 220 Watts during cooling operation. Over the course of entire heating and cooling seasons, these translated into average electric energy savings of 163 kWh. Average cost savings were $20 per year. Homes where the fan was used outside of heating and cooling mode saved an additional $42 per year on average. Results indicate that BPM replacement motors will be most cost-effective in HVAC systems with longer run times and relatively low duct static pressures. More dramatic savings are possible if occupants use the fan-only setting when there is no thermal load. There are millions of cold-climate, U.S. homes that meet these criteria, but the savings in most homes tested in this study were modest.

Aldrich, R.; Williamson, J.

2014-01-01T23:59:59.000Z

446

System efficiency analysis for high power solid state radio frequency transmitter  

SciTech Connect (OSTI)

This paper examines some important relationships, related with the system efficiency, for very high power, radio frequency solid-state transmitter; incorporating multiple solid-state power amplifier modules, power combiners, dividers, couplers, and control/interlock hardware. In particular, the characterization of such transmitters, at the component as well as the system level, is discussed. The analysis for studying the influence of the amplitude and phase imbalance, on useful performance parameters like system efficiency and power distribution is performed. This analysis is based on a scattering parameter model. This model serves as a template for fine-tuning the results, with the help of a system level simulator. For experimental study, this approach is applied to a recently designed modular and scalable solid-state transmitter, operating at the centre frequency of 505.8?MHz and capable of delivering a continuous power of 75 kW. Such first time presented, system level study and experimental characterization for the real time operation will be useful for the high power solid-state amplifier designs, deployed in particle accelerators.

Jain, Akhilesh, E-mail: ajain@rrcat.gov.in; Sharma, D. K.; Gupta, A. K.; Lad, M. R.; Hannurkar, P. R. [RF Systems Division, Raja Ramanna Centre for Advanced Technology, Indore 452013 (India)] [RF Systems Division, Raja Ramanna Centre for Advanced Technology, Indore 452013 (India); Pathak, S. K. [Electromagnetics and Microwave Engineering, Institute for Plasma Research, Gandhinagar 382 428 (India)] [Electromagnetics and Microwave Engineering, Institute for Plasma Research, Gandhinagar 382 428 (India)

2014-02-15T23:59:59.000Z

447

Comparison of energy efficiency between variable refrigerant flow systems and ground source heat pump systems  

E-Print Network [OSTI]

as other types of air source heat pumps, VRF systems needconventional packaged air source heat pumps. Typical GSHPis basically an air source heat pump), especially when the

Hong, Tainzhen

2010-01-01T23:59:59.000Z

448

NISTHB 150-10 Efficiency of  

E-Print Network [OSTI]

NISTHB 150-10 NVLAP Efficiency of Electric Motors Timothy Rasinski http://dx.doi.org/10.6028/NIST.HB.150-10 #12;This page is intentionally left blank. #12;NISTHB 150-10 NVLAP Efficiency of Electric Motors Timothy Rasinski National Voluntary Laboratory Accreditation Program Standards Coordination Office

449

MSC Human Neuroscience 2010-11 PS 5102 lecture 5: Sensory Systems II : Sensory-Motor Integration  

E-Print Network [OSTI]

(cybernetics) to simple systems 路 the ecological approach 颅 flowfields 路 human perception-action on the road PR & Georgeson, M (1996) Visual Perception: Physiology, Psychology and Ecology (3rd ed.) Hove The ecological approach to visual perception. Hillsdale, New Jersey: Lawrence Erlbaum Associates. 路 G枚tz, K G

Zanker, Johannes M.

450

Bottom-Up Energy Analysis System - Methodology and Results  

E-Print Network [OSTI]

market shares Industrial electric motors activity parametersInitiative. in IEA Electric Motor Systems Workshop. 2006.Standards for Electric Motors in Brazilian Industry. Energy

McNeil, Michael A.

2013-01-01T23:59:59.000Z

451

MotorWeek  

ScienceCinema (OSTI)

In 2008, PBS's MotorWeek, television's original automotive magazine, visited Argonne's Transportation Technology R&D Center "to learn what it really takes to make clean power sources a viable reality."

None

2013-04-19T23:59:59.000Z

452

Markov Process of Muscle Motors  

E-Print Network [OSTI]

We study a Markov random process describing a muscle molecular motor behavior. Every motor is either bound up with a thin filament or unbound. In the bound state the motor creates a force proportional to its displacement from the neutral position. In both states the motor spend an exponential time depending on the state. The thin filament moves at its velocity proportional to average of all displacements of all motors. We assume that the time which a motor stays at the bound state does not depend on its displacement. Then one can find an exact solution of a non-linear equation appearing in the limit of infinite number of the motors.

Yu. Kondratiev; E. Pechersky; S. Pirogov

2007-06-20T23:59:59.000Z

453

Energy Efficiency of large Cryogenic Systems: the LHC Case and Beyond  

E-Print Network [OSTI]

Research infrastructures for high-energy and nuclear physics, nuclear fusion and production of high magnetic fields are increasingly based on applied superconductivity and associated cryogenics in their quest for scientific breakthroughs at affordable capital and operation costs, a condition for their acceptance and sustained funding by society. The thermodynamic penalty for operating at low temperature makes energy efficiency a key requirement for their large cryogenic systems, from conceptual design to procurement, construction and operation. Meeting this requirement takes a combined approach on several fronts in parallel: management of heat loads and sizing of cooling duties, distribution of cooling power matching the needs of the superconducting devices, efficient production of refrigeration, optimal control resting on precise instrumentation and diagnostics, as well as a targeted industrial procurement policy. The case of the Large Hadron Collider (LHC) at CERN is presented. Potential improvements for fu...

Claudet, S; Ferlin, G; Lebrun, P; Tavian, L; Wagner, U

2013-01-01T23:59:59.000Z

454

An Efficient LED System-in-Module for General Lighting Applications  

SciTech Connect (OSTI)

The objective of the project was to realize an LED-based lighting technology platform for general illumination, starting with LED chips, and integrating the necessary technologies to make compact, user-friendly, high-efficiency, energy-saving sources of controlled white (or variable-colored) light. The project is to build the system around the LEDs, and not to work on the LEDs themselves, in order that working products can be introduced soon after the LEDs reach suitable efficiency for mass-production of high-power light sources for general illumination. Because the light sources are intended for general illumination, color must be accurately maintained, requiring feedback control in the electronics. The project objective has been realized and screw base demonstrators, based on the technology developed in the project, have been built.

None

2008-09-14T23:59:59.000Z

455

Comparison of energy efficiency between variable refrigerant flow systems and ground source heat pump systems  

E-Print Network [OSTI]

multiple water-to-air heat pump units, which are connectedeach of the water-to-air heat pump units can run in eitheras other types of air source heat pumps, VRF systems need

Hong, Tainzhen

2010-01-01T23:59:59.000Z

456

Enhanced catalyst for conversion of syngas to liquid motor fuels  

DOE Patents [OSTI]

Synthesis gas comprising carbon monoxide and hydrogen is converted to C.sub.5.sup.+ hydrocarbons suitable for use as liquid motor fuels by contact with a dual catalyst system capable of enhancing the selectivity of said conversion to motor fuel range hydrocarbons and the quality of the resulting motor fuel product. The catalyst composition employs a Fischer-Tropsch catalyst, together with a co-catalyst/support component comprising SAPO silicoaluminophosphate, non-zeolitic molecular sieve catalyst.

Coughlin, Peter K. (Yorktown Heights, NY); Rabo, Jule A. (Armonk, NY)

1985-01-01T23:59:59.000Z

457

Enhanced conversion of syngas to liquid motor fuels  

DOE Patents [OSTI]

Synthesis gas comprising carbon monoxide and hydrogen is converted to C.sub.5.sup.+ hydrocarbons suitable for use as liquid motor fuels by contact with a dual catalyst system capable of enhancing the selectivity of said conversion to motor fuel range hydrocarbons and the quality of the resulting motor fuel product. The catalyst composition employs a Fischer-Tropsch catalyst, together with a co-catalyst/support component comprising SAPO silicoaluminophosphate, non-zeolitic molecular sieve catalyst.

Coughlin, Peter K. (Yorktown Heights, NY); Rabo, Jule A. (Armonk, NY)

1986-01-01T23:59:59.000Z

458

Enhanced catalyst for conversion of syngas to liquid motor fuels  

DOE Patents [OSTI]

Synthesis gas comprising carbon monoxide and hydrogen is converted to C[sub 5][sup +] hydrocarbons suitable for use as liquid motor fuels by contact with a dual catalyst system capable of enhancing the selectivity of said conversion to motor fuel range hydrocarbons and the quality of the resulting motor fuel product. The catalyst composition employs a Fischer-Tropsch catalyst, together with a co-catalyst/support component comprising a SAPO silicoaluminophosphate, non-zeolitic molecular sieve catalyst.

Coughlin, P.K.; Rabo, J.A.

1985-12-03T23:59:59.000Z

459

Buildings sector demand-side efficiency technology summaries  

SciTech Connect (OSTI)

This report provides descriptions of the following energy efficiency technologies: energy management systems; electronic fluorescent ballasts; compact fluorescent lamps; lighting controls; room air conditioners; high albedo materials, coatings and paints; solar domestic water heaters; heat pump water heaters; energy-efficient motors; adjustable-speed drives; energy-efficient refrigerators; daylight control glazing; insulating glazing; solar control glazing; switchable glazing; tree planting; and advanced insulation. For each technology, the report provides a description of performance characteristics, consumer utility, development status, technology standards, equipment cost, installation, maintenance, conservation programs, and environmental impacts.

Koomey, J.G.; Johnson, F.X.; Schuman, J. [and others

1994-03-01T23:59:59.000Z

460

Truck Essential Power Systems Efficiency Improvements for Medium-Duty Trucks  

SciTech Connect (OSTI)

With a variety of hybrid vehicles available in the passenger car market, electric technologies and components of that scale are becoming readily available. Commercial vehicle segments have lagged behind passenger car markets, leaving opportunities for component and system development. Escalating fuel prices impact all markets and provide motivation for OEMs, suppliers, customers, and end-users to seek new techniques and technologies to deliver reduced fuel consumption. The research presented here specifically targets the medium-duty (MD), Class 4-7, truck market with technologies aimed at reducing fuel consumption. These technologies could facilitate not only idle, but also parasitic load reductions. The development efforts here build upon the success of the More Electric Truck (MET) demonstration program at Caterpillar Inc. Employing a variety of electric accessories, the MET demonstrated the improvement seen with such technologies on a Class 8 truck. The Truck Essential Power Systems Efficiency Improvements for Medium-Duty Trucks (TEPS) team scaled the concepts and successes of MET to a MD chassis. The team designed an integrated starter/generator (ISG) package and energy storage system (ESS), explored ways to replace belt and gear-driven accessory systems, and developed supervisory control algorithms to direct the usage of the generated electricity and system behavior on the vehicle. All of these systems needed to fit within the footprint of a MD vehicle and be compatible with the existing conventional systems to the largest extent possible. The overall goal of this effort was to demonstrate a reduction in fuel consumption across the drive cycle, including during idle periods, through truck electrification. Furthermore, the team sought to evaluate the benefits of charging the energy storage system during vehicle braking. The vehicle features an array of electric accessories facilitating on-demand, variable actuation. Removal of these accessories from the belt or geartrain of the engine yields efficiency improvements for the engine while freeing those accessories to perform at their individual peak efficiencies to meet instantaneous demand. The net result is a systems approach to fuel usage optimization. Unique control algorithms were specifically developed to capitalize on the flexibility afforded by the TEPS architecture. Moreover, the TEPS truck technology mixture exhibits a means to supplant current accessory power sources such as on-board or trailer-mounted gasoline-powered generators or air compressors. Such functionality further enhances the value of the electric systems beyond the fuel savings alone. To demonstrate the fuel economy improvement wrought via the TEPS components, vehicle fuel economy testing was performed on the nearly stock (baseline) truck and the TEPS truck. Table 1 illustrates the fuel economy gains produced by the TEPS truck electrification. While the fuel economy results shown in Table 1 do reflect specific test conditions, they show that electrification of accessory hardware can yield significant fuel savings. In this case, the savings equated to a 15 percent reduction in fuel consumption during controlled on-road testing. Truck electrification allows engine shutdown during idle conditions as well as independent on-demand actuation of accessory systems. In some cases, independent actuation may even include lack of operation, a feature not always present in mechanically driven components. This combination of attributes allows significant improvements in system efficiency and the fuel economy improvements demonstrated by the TEPS team.

Larry Slone; Jeffery Birkel

2007-12-31T23:59:59.000Z

Note: This page contains sample records for the topic "motor systems efficiency" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


461

Joint System Prognostics For Increased Efficiency And Risk Mitigation In Advanced Nuclear Reactor Instrumentation and Control  

SciTech Connect (OSTI)

The science of prognostics is analogous to a doctor who, based on a set of symptoms and patient tests, assesses a probable cause, the risk to the patient, and a course of action for recovery. While traditional prognostics research has focused on the aspect of hydraulic and mechanical systems and associated failures, this project will take a joint view in focusing not only on the digital I&C aspect of reliability and risk, but also on the risks associated with the human element. Model development will not only include an approximation of the control system physical degradation but also on human performance degradation. Thus the goal of the prognostic system is to evaluate control room operation; to identify and potentially take action when performance degradation reduces plant efficiency, reliability or safety.

Donald D. Dudenhoeffer; Tuan Q. Tran; Ronald L. Boring; Bruce P. Hallbert

2006-08-01T23:59:59.000Z

462

Efficiency Improvement through Reduction in Friction and Wear in Powertrain Systems  

SciTech Connect (OSTI)

The objective of this project is to improve the efficiency of truck drivelines through reduction of friction and parasitic losses in transmission and drive axles. Known efficiencies for these products exceeded 97 percent, so the task was not trivial. The project relied on a working relationship between modeling and hardware testing. Modeling was to shorten the development cycle by guiding the selection of materials, processes and strategies. Bench top and fixture tests were to validate the models. Modeling was performed at a world class, high academic level, but in the end, modeling did not impact the hardware development as much as intended. Insights leading to the most significant accomplishments came from bench top and fixture tests and full scale dynamometer tests. A key development in the project was the formulation of the implementation strategy. Five technical elements with potential to minimize friction and parasitic losses were identified. These elements included churning, lubrication, surface roughness, coatings and textures. An interesting fact is that both Caterpillar and Eaton independently converged on the same set of technical elements in formulating their implementation strategies. Exploiting technical elements of the implementation strategy had a positive impact on transmission and drive axle efficiencies. During one dynamometer test of an Eaton Best Tech 1 transmission, all three gear ranges tested: Under drive, direct drive and over drive, showed efficiencies greater than 99 percent. Technology boosts to efficiency for transmissions reached 1 percent, while efficiency improvements to drive axle pushed 2 percent. These advancements seem small, but the accomplishment is large considering that these products normally run at greater than 97 percent efficiency. Barriers and risks to implementing these technology elements are clear. Schemes using a low fill sump and spray tubes endanger the gears and bearings by lubricant starvation. Gear coatings have exhibited durability issues, stripping away under conditions less demanding than 750,000 miles in service on the road. Failed coatings compound the problem by contaminating the lubricant with hard particles. Under the most severe conditions, super finished surfaces may polish further, reaching a surface roughness unable to support the critical oil film thickness. Low viscosity and low friction lubricants may not protect the gears and bearings adequately leading to excessive pitting, wear and noise. Additives in low friction oils may not stay in solution or suspended thus settling to the bottom and unavailable when they are needed most. Technical barriers and risks can be overcome through engineering, but two barriers remain formidable: (1) cost of the technology and (2) convincing fleet owners that the technology provides a tangible benefit. Dry sumps lower lubricant operating temperatures so the removal of heat exchangers and hoses and reduced demand on engine cooling systems justify their use. The benefits of surface texturing are varied and remain unproven. Lubricant costs seem manageable, but the cost of super finishing and gear coating are high. These are issues of scale and processing technology. Going across the board with gear super finishing and coating will reduce costs. Pushing the envelope to applications with higher torque and higher power density should drive the adoption of these technologies. Fleet owners are an educated and seasoned lot. Only technology measureable in dollars returned is used on truck fleets. To convince fleet owners of the benefit of these technologies, new precision in measuring fuel efficiency must be introduced. Legislation for a minimum standard in truck miles per gallon would also enable the use of these technologies. Improving the efficiency of truck transmissions and axle will make a noticeable impact on the fuel consumption by heavy vehicles in the United States. However, the greatest benefit will come when all the individual efficiency technologies like hybrid power, aerodynamic fairings, auxiliary power units, super

Michael Killian

2009-09-30T23:59:59.000Z

463

Advanced Hybrid Propulsion and Energy Management System for High Efficiency, Off Highway, 240 Ton Class, Diesel Electric Haul Trucks  

SciTech Connect (OSTI)

The objective of this project is to reduce the fuel consumption of off-highway vehicles, specifically large tonnage mine haul trucks. A hybrid energy storage and management system will be added to a conventional diesel-electric truck that will allow capture of braking energy normally dissipated in grid resistors as heat. The captured energy will be used during acceleration and motoring, reducing the diesel engine load, thus conserving fuel. The project will work towards a system validation of the hybrid system by first selecting an energy storage subsystem and energy management subsystem. Laboratory testing at a subscale level will evaluate these selections and then a full-scale laboratory test will be performed. After the subsystems have been proven at the full-scale lab, equipment will be mounted on a mine haul truck and integrated with the vehicle systems. The integrated hybrid components will be exercised to show functionality, capability, and fuel economy impacts in a mine setting.

Richter, Tim; Slezak, Lee; Johnson, Chris; Young, Henry; Funcannon, Dan

2008-12-31T23:59:59.000Z

464

Modular PM Motor Drives for Automotive Traction Applications  

SciTech Connect (OSTI)

This paper presents modular permanent magnet (PM) motor drives for automotive traction applications. A partially modularized drive system consisting of a single PM motor and multiple inverters is described. The motor has multiple three-phase stator winding sets and each winding set is driven with a separate three-phase inverter module. A truly modularized inverter and motor configuration based on an axial-gap PM motor is then introduced, in which identical PM motor modules are mounted on a common shaft and each motor module is powered by a separate inverter module. The advantages of the modular approach for both inverter and motor include: (1) power rating scalability--one design meets different power requirements by simply stacking an adequate number of modules, thus avoiding redesigning and reducing the development cost, (2) increased fault tolerance, and (3) easy repairing. A prototype was constructed by using two inverters and an axial-gap PM motor with two sets of three-phase stat or windings, and it is used to assist the diesel engine in a hybrid electric vehicle converted from a Chevrolet Suburban. The effect of different pulse-width-modulation strategies for both motoring and regenerative modes on current control is analyzed. Torque and regenerative control algorithms are implemented with a digital signal processor. Analytical and initial testing results are included in the paper.

Su, G.J.

2001-10-29T23:59:59.000Z

465

Variable current speed controller for eddy current motors  

DOE Patents [OSTI]

A speed control system for eddy current motors is provided in which the current to the motor from a constant frequency power source is varied by comparing the actual motor speed signal with a setpoint speed signal to control the motor speed according to the selected setpoint speed. A three-phase variable voltage autotransformer is provided for controlling the voltage from a three-phase power supply. A corresponding plurality of current control resistors is provided in series with each phase of the autotransformer output connected to inputs of a three-phase motor. Each resistor is connected in parallel with a set of normally closed contacts of plurality of relays which are operated by control logic. A logic circuit compares the selected speed with the actual motor speed obtained from a digital tachometer monitoring the motor spindle speed and operated the relays to add or substract resistance equally in each phase of the motor input to vary the motor current to control the motor at the selected speed.

Gerth, H.L.; Bailey, J.M.; Casstevens, J.M.; Dixon, J.H.; Griffith, B.O.; Igou, R.E.

1982-03-12T23:59:59.000Z

466

Abstract Dynamically reconfigurable systems offer the potential for realising efficient systems as well as providing  

E-Print Network [OSTI]

and money. In a world now running on 'Internet time', where product life cycles are down to months mobile multimedia systems that have limited battery resources, must handle diverse data types, and must, battery-operated device, small enough to carry along all the time. This device will be used

Havinga, Paul J.M.

467

Dynamically reconfigurable systems offer the potential for realising efficient systems as well as  

E-Print Network [OSTI]

now running on 'Internet time', where product life cycles are down to months, and personalization mobile multimedia systems that have limited battery resources, must handle diverse data types, and must will be an integrated, battery- operated device, small enough to carry along all the time. This device will be used

Havinga, Paul J.M.

468

Real Time Flux Control in PM Motors  

SciTech Connect (OSTI)

Significant research at the Oak Ridge National Laboratory (ORNL) Power Electronics and Electric Machinery Research Center (PEEMRC) is being conducted to develop ways to increase (1) torque, (2) speed range, and (3) efficiency of traction electric motors for hybrid electric vehicles (HEV) within existing current and voltage bounds. Current is limited by the inverter semiconductor devices' capability and voltage is limited by the stator wire insulation's ability to withstand the maximum back-electromotive force (emf), which occurs at the upper end of the speed range. One research track has been to explore ways to control the path and magnitude of magnetic flux while the motor is operating. The phrase, real time flux control (RTFC), refers to this mode of operation in which system parameters are changed while the motor is operating to improve its performance and speed range. RTFC has potential to meet an increased torque demand by introducing additional flux through the main air gap from an external source. It can augment the speed range by diverting flux away from the main air gap to reduce back-emf at high speeds. Conventional RTFC technology is known as vector control [1]. Vector control decomposes the stator current into two components; one that produces torque and a second that opposes (weakens) the magnetic field generated by the rotor, thereby requiring more overall stator current and reducing the efficiency. Efficiency can be improved by selecting a RTFC method that reduces the back-emf without increasing the average current. This favors methods that use pulse currents or very low currents to achieve field weakening. Foremost in ORNL's effort to develop flux control is the work of J. S. Hsu. Early research [2,3] introduced direct control of air-gap flux in permanent magnet (PM) machines and demonstrated it with a flux-controlled generator. The configuration eliminates the problem of demagnetization because it diverts all the flux from the magnets instead of trying to oppose it. It is robust and could be particularly useful for PM generators and electric vehicle drives. Recent efforts have introduced a brushless machine that transfers a magneto-motive force (MMF) generated by a stationary excitation coil to the rotor [4]. Although a conventional PM machine may be field weakened using vector control, the air-gap flux density cannot be effectively enhanced. In Hsu's new machine, the magnetic field generated by the rotor's PM may be augmented by the field from the stationery excitation coil and channeled with flux guides to its desired destination to enhance the air-gap flux that produces torque. The magnetic field can also be weakened by reversing the current in the stationary excitation winding. A patent for advanced technology in this area is pending. Several additional RTFC methods have been discussed in open literature. These include methods of changing the number of poles by magnetizing and demagnetizing the magnets poles with pulses of current corresponding to direct-axis (d-axis) current of vector control [5,6], changing the number of stator coils [7], and controlling the air gap [8]. Test experience has shown that the magnet strengths may vary and weaken naturally as rotor temperature increases suggesting that careful control of the rotor temperature, which is no easy task, could yield another method of RTFC. The purpose of this report is to (1) examine the interaction of rotor and stator flux with regard to RTFC, (2) review and summarize the status of RTFC technology, and (3) compare and evaluate methods for RTFC with respect to maturity, advantages and limitations, deployment difficulty and relative complexity.

Otaduy, P.J.

2005-09-27T23:59:59.000Z

469

Energy-efficient mortgages and home energy rating systems: A report on the nation`s progress  

SciTech Connect (OSTI)

This report summarizes progress throughout the nation in establishing voluntary programs linking home energy rating systems (HERS) and energy-efficient mortgages (EEMs). These programs use methods for rating the energy efficiency of new and existing homes and predicting energy cost savings so lenders can factor in energy cost savings when underwriting mortgages. The programs also encourage lenders to finance cost-effective energy-efficiency improvements to existing homes with low-interest mortgages or other instruments. The money saved on utility bills over the long term can more than offset the cost of such energy-efficiency improvements. The National Collaborative on HERS and EEMs recommended that this report be prepared.

Farhar, B.C.; Eckert, J.

1993-09-01T23:59:59.000Z

470

Study of Energy and Demand Savings on a High Efficiency Hydraulic Pump System with Infinite Turn Down Technology (ITDT)  

E-Print Network [OSTI]

Detailed field measurement and verification of electrical energy (kWh) and demand (kW) savings is conducted on an injection molding machine used in typical plastic manufacturing facility retrofitted with a high efficiency hydraulic pump system...

Sfeir, R. A.; Kanungo, A.; Liou, S.

2005-01-01T23:59:59.000Z

471

Efficient Detection on Stochastic Faults in PLC Based Automated Assembly Systems With Novel Sensor Deployment and Diagnoser Design  

E-Print Network [OSTI]

In this dissertation, we proposed solutions on novel sensor deployment and diagnoser design to efficiently detect stochastic faults in PLC based automated systems First, a fuzzy quantitative graph based sensor deployment was called upon to model...

Wu, Zhenhua

2012-07-16T23:59:59.000Z

472

MotorMaster+ International | Department of Energy  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

of the capabilities and features of MotorMaster+. However, users can evaluate repairreplacement options on a broader range of motors, including 60 hertz (Hz) motors tested under...

473

Aging assessment of large electric motors in nuclear power plants  

SciTech Connect (OSTI)

Large electric motors serve as the prime movers to drive high capacity pumps, fans, compressors, and generators in a variety of nuclear plant systems. This study examined the stressors that cause degradation and aging in large electric motors operating in various plant locations and environments. The operating history of these machines in nuclear plant service was studied by review and analysis of failure reports in the NPRDS and LER databases. This was supplemented by a review of motor designs, and their nuclear and balance of plant applications, in order to characterize the failure mechanisms that cause degradation, aging, and failure in large electric motors. A generic failure modes and effects analysis for large squirrel cage induction motors was performed to identify the degradation and aging mechanisms affecting various components of these large motors, the failure modes that result, and their effects upon the function of the motor. The effects of large motor failures upon the systems in which they are operating, and on the plant as a whole, were analyzed from failure reports in the databases. The effectiveness of the industry`s large motor maintenance programs was assessed based upon the failure reports in the databases and reviews of plant maintenance procedures and programs.

Villaran, M.; Subudhi, M. [Brookhaven National Lab., Upton, NY (United States)

1996-03-01T23:59:59.000Z

474

Decision Support Systems to Identify Efficient Beef Production Systems Collecting individual phenotype data in cattle is expensive; therefore, scientific approaches that integrate and apply accumulated  

E-Print Network [OSTI]

Decision Support Systems to Identify Efficient Beef Production Systems Collecting individual impact of beef production. Objective The objective is to develop a decision-support system and Cornell Value Discovery System) and found that genetic correlations between observed and predicted intakes

475

Achieving Extreme Efficiency: How to get the job done when energy is extremely expensive and scarce  

E-Print Network [OSTI]

www.lightingprize.org), an energy-efficient design contestenergy-efficient technologies. Finally, with respect to air handling, DC motors and airfoil fan blade design

Brown, Rich

2013-01-01T23:59:59.000Z

476

A preliminary study on potential indicators of technical efficiency in a grain export marketing system: the Argentine case  

E-Print Network [OSTI]

A PRELIMINARY STUDY ON POTENTIAL INDICATORS OF TECHNICAL EFFICIENCY IN A GRAIN EXPORT MARKETING SYSTEM: THE ARGENTINE CASE A Thesis by SHASI CHERYL RUTH WILSON Submitted to the Graduate College of Texas ASM University in partial fulfillment... of the requirement for the degree of MASTER OF SCIENCE May 1982 Major Subject: Agricultural Economics A PRELIMINARY STUDY ON POTENTIAL INDICATORS OP TECHNICAL EFFICIENCY IN A GRAIN EXPORT MARKETING SYSTEM: THE ARGENTINE CASE A Thesis by SHASI CHERYL RUTH...

Wilson, Shasi Cheryl Ruth

1982-01-01T23:59:59.000Z

477

Ultra Clean 1.1MW High Efficiency Natural Gas Engine Powered System  

SciTech Connect (OSTI)

Dresser, Inc. (GE Energy, Waukesha gas engines) will develop, test, demonstrate, and commercialize a 1.1 Megawatt (MW) natural gas fueled combined heat and power reciprocating engine powered package. This package will feature a total efficiency > 75% and ultra low CARB permitting emissions. Our modular design will cover the 1 6 MW size range, and this scalable technology can be used in both smaller and larger engine powered CHP packages. To further advance one of the key advantages of reciprocating engines, the engine, generator and CHP package will be optimized for low initial and operating costs. Dresser, Inc. will leverage the knowledge gained in the DOE - ARES program. Dresser, Inc. will work with commercial, regulatory, and government entities to help break down barriers to wider deployment of CHP. The outcome of this project will be a commercially successful 1.1 MW CHP package with high electrical and total efficiency that will significantly reduce emissions compared to the current central power plant paradigm. Principal objectives by phases for Budget Period 1 include: Phase 1 market study to determine optimum system performance, target first cost, lifecycle cost, and creation of a detailed product specification. Phase 2 Refinement of the Waukesha CHP system design concepts, identification of critical characteristics, initial evaluation of technical solutions, and risk mitigation plans. Background

Zurlo, James; Lueck, Steve

2011-08-31T23:59:59.000Z

478

Low background high efficiency radiocesium detection system based on positron emission tomography technology  

SciTech Connect (OSTI)

After the 2011 nuclear power plant accident at Fukushima, radiocesium contamination in food became a serious concern in Japan. However, low background and high efficiency radiocesium detectors are expensive and huge, including semiconductor germanium detectors. To solve this problem, we developed a radiocesium detector by employing positron emission tomography (PET) technology. Because {sup 134}Cs emits two gamma photons (795 and 605 keV) within 5 ps, they can selectively be measured with coincidence. Such major environmental gamma photons as {sup 40}K (1.46 MeV) are single photon emitters and a coincidence measurement reduces the detection limit of radiocesium detectors. We arranged eight sets of Bi{sub 4}Ge{sub 3}O{sub 12} (BGO) scintillation detectors in double rings (four for each ring) and measured the coincidence between these detectors using PET data acquisition system. A 50 50 30 mm BGO was optically coupled to a 2 in. square photomultiplier tube (PMT). By measuring the coincidence, we eliminated most single gamma photons from the energy distribution and only detected those from {sup 134}Cs at an average efficiency of 12%. The minimum detectable concentration of the system for the 100 s acquisition time is less than half of the food monitor requirements in Japan (25 Bq/kg). These results show that the developed radiocesium detector based on PET technology is promising to detect low level radiocesium.

Yamamoto, Seiichi; Ogata, Yoshimune [Department of Radiological and Medical Laboratory Sciences, Nagoya University Graduate School of Medicine, 1-1-20 Daiko-Minami, Higashi-ku, Nagoya 461-8673 (Japan)] [Department of Radiological and Medical Laboratory Sciences, Nagoya University Graduate School of Medicine, 1-1-20 Daiko-Minami, Higashi-ku, Nagoya 461-8673 (Japan)

2013-09-15T23:59:59.000Z

479

Similarity and generalized analysis of efficiencies of thermal energy storage systems  

SciTech Connect (OSTI)

This paper examined the features of three typical thermal storage systems including: (1) direct storage of heat transfer fluid in containers, (2) storage of thermal energy in a packed bed of solid filler material, with energy being carried in/out by a flowing heat transfer fluid which directly contacts the packed bed, and (3) a system in which heat transfer fluid flows through tubes that are imbedded into a thermal storage material which may be solid, liquid, or a mixture of the two. The similarity of the three types of thermal storage systems was discussed, and generalized energy storage governing equations were introduced in both dimensional and dimensionless forms. The temperatures of the heat transfer fluid during energy charge and discharge processes and the overall energy storage efficiencies were studied through solution of the energy storage governing equations. Finally, provided in the paper are a series of generalized charts bearing curves for energy storage effectiveness against four dimensionless parameters grouped up from many of the thermal storage system properties including dimensions, fluid and thermal storage material properties, as well as the operational conditions including mass flow rate of the fluid, and the ratio of energy charge and discharge time periods. Engineers can conveniently look up the charts to design and calibrate the size of thermal storage tanks and operational conditions without doing complicated individual modeling and computations. It is expected that the charts will serve as standard tools for thermal storage system design and calibration.

Peiwen Li; Jon Van Lew; Cholik Chan; Wafaa Karaki; Jake Stephens; J. E. O'Brien

2012-03-01T23:59:59.000Z

480

Power applications of high-temperature superconductivity: Variable speed motors, current switches, and energy storage for end use  

SciTech Connect (OSTI)

The objective of this project is to conduct joint research and development activities related to certain electric power applications of high-temperature superconductivity (HTS). The new superconductors may allow development of an energy-efficient switch to control current to variable speed motors, superconducting magnetic energy storage (SMES) systems, and other power conversion equipment. Motor types that were considered include induction, permanent magnet, and superconducting ac motors. Because it is impractical to experimentally alter certain key design elements in radial-gap motors, experiments were conducted on an axial field superconducting motor prototype using 4 NbTi magnets. Superconducting magnetic energy storage technology with 0.25--5 kWh stored energy was studied as a viable solution to short duration voltage sag problems on the customer side of the electric meter. The technical performance characteristics of the device wee assembled, along with competing technologies such as active power line conditioners with storage, battery-based uninterruptible power supplies, and supercapacitors, and the market potential for SMES was defined. Four reports were prepared summarizing the results of the project.

Hawsey, R.A. [Oak Ridge National Lab., TN (United States); Banerjee, B.B.; Grant, P.M. [Electric Power Research Inst., Palo Alto, CA (United States)

1996-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "motor systems efficiency" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


481

A Fuzzy-Based Strategy to Improve Control Reconfiguration Performance of a Sensor Fault-Tolerant Induction Motor Propulsion  

E-Print Network [OSTI]

recovery in the Electric (EV) or Hybrid Electric Vehicle (HEV) induction motor drive. To achieve this goal-ref 路 Fault Tolerant Controller HybridHybrid ElectricElectric VehicleVehicle Induction Motor Sensorless Fuzzy) and the minimization of the size and the weight of the motor and the drive. All these aspect call for an efficiency

Paris-Sud XI, Universit茅 de

482

Bent shaft motor  

DOE Patents [OSTI]

A nonelectromagnetic motor comprising a base, a bent shaft which is rotatable relative to the base wherein the bent shaft comprises a straight portion aligned with a main axis and an offset portion that is offset with respect to the main axis; and a drive means for driving the offset portion of the bent shaft along a generally circular path in a plane perpendicular to the main axis to rotate the bent shaft. The bent shaft and drive means for driving the bent shaft can be selected from piezoelectric, magnetostrictive, rheological and shape memory alloys. The drive means of the nonelectromagnetic motor can additionally comprise a shell which shell surrounds and houses the bent shaft and precesses or gyrates which in turn causes the bent drive shaft to rotate. The nonelectromagnetic motor does not rely on friction for the application of torque upon a rotor. 11 figs.

Benavides, G.L.

1998-05-05T23:59:59.000Z

483

Bent shaft motor  

DOE Patents [OSTI]

A nonelectromagnetic motor comprising a base, a bent shaft which is rotable relative to the base wherein the bent shaft comprises a straight portion aligned with a main axis and an offset portion that is offset with respect to the main axis; and a drive means for driving the offset portion of the bent shaft along a generally circular path in a plane perpendicular to the main axis to rotate the bent shaft. The bent shaft and drive means for driving the bent shaft can be selected from piezoelectric, magnetostrictive, rheological and shape memory alloys. The drive means of the nonelectromagnetic motor can additionally comprise a shell which shell surrounds and houses the bent shaft and precesses or gyrates which in turn causes the bent drive shaft to rotate. The nonelectromagnetic motor does not rely on friction for the application of torque upon a rotor.

Benavides, Gilbert L. (Albuquerque, NM)

1998-01-01T23:59:59.000Z

484

Motor current signature analysis method for diagnosing motor operated devices  

DOE Patents [OSTI]

A motor current noise signature analysis method and apparatus for remotely monitoring the operating characteristics of an electric motor-operated device such as a motor-operated valve. Frequency domain signal analysis techniques are applied to a conditioned motor current signal to distinctly identify various operating parameters of the motor driven device from the motor current signature. The signature may be recorded and compared with subsequent signatures to detect operating abnormalities and degradation of the device. This diagnostic method does not require special equipment to be installed on the motor-operated device, and the current sensing may be performed at remote control locations, e.g., where the motor-operated devices are used in accessible or hostile environments.

Haynes, Howard D. (Kingston, TN); Eissenberg, David M. (Oak Ridge, TN)

1990-01-01T23:59:59.000Z

485

Dynein Motor Domain Shows Ring-Shaped Motor, Buttress  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Dynein Motor Domain Shows Ring-Shaped Motor, Buttress Print Movement is fundamental to life. It takes place even at the cellular level where cargo is continually being transported...

486

Design and prototyping methods for brushless motors and motor control  

E-Print Network [OSTI]

In this report, simple, low-cost design and prototyping methods for custom brushless permanent magnet synchronous motors are explored. Three case-study motors are used to develop, illustrate and validate the methods. Two ...

Colton, Shane W. (Shane William)

2010-01-01T23:59:59.000Z

487

Adaptive robust motion control of linear motors for precision manufacturing  

E-Print Network [OSTI]

for widespread use in high-speed/high-accuracy positioning systems [13]. In general, the linear motor hasAdaptive robust motion control of linear motors for precision manufacturing Bin Yao *, Li Xu School of Mechanical Engineering, Purdue University, West Lafayette, IN 47907, USA Received 6 October 1999; accepted 11

Yao, Bin

488

Motor transport of self-assembled cargos in crowded environments  

E-Print Network [OSTI]

). Additionally, experimental studies have shown that teams of motors are capable of bypassing static obstacles and experimental bio- physical model systems of intracellular cargo have assumed fixed teams of motors transporting. axonal transport | cytoplasmic dynein Intracellular transport is an essential cellular process used

Ross, Jennifer

489

Energy Efficiency Improvement and Cost Saving Opportunities for the Petrochemical Industry - An ENERGY STAR(R) Guide for Energy and Plant Managers  

E-Print Network [OSTI]

V. (2001). Optimize energy efficiency of HRSG. HydrocarbonCEC (2001). 2001 Energy Efficiency Standards for Residential2002. Consortium for Energy Efficiency (CEE), 2007. Motor

Neelis, Maarten

2008-01-01T23:59:59.000Z

490

Effective detective quantum efficiency for two mammography systems: Measurement and comparison against established metrics  

SciTech Connect (OSTI)

Purpose: The aim of this paper was to illustrate the value of the new metric effective detective quantum efficiency (eDQE) in relation to more established measures in the optimization process of two digital mammography systems. The following metrics were included for comparison against eDQE: detective quantum efficiency (DQE) of the detector, signal difference to noise ratio (SdNR), and detectability index (d?) calculated using a standard nonprewhitened observer with eye filter.Methods: The two systems investigated were the Siemens MAMMOMAT Inspiration and the Hologic Selenia Dimensions. The presampling modulation transfer function (MTF) required for the eDQE was measured using two geometries: a geometry containing scattered radiation and a low scatter geometry. The eDQE, SdNR, and d? were measured for poly(methyl methacrylate) (PMMA) thicknesses of 20, 40, 60, and 70 mm, with and without the antiscatter grid and for a selection of clinically relevant target/filter (T/F) combinations. Figures of merit (FOMs) were then formed from SdNR and d? using the mean glandular dose as the factor to express detriment. Detector DQE was measured at energies covering the range of typical clinically used spectra.Results: The MTF measured in the presence of scattered radiation showed a large drop at low spatial frequency compared to the low scatter method and led to a corresponding reduction in eDQE. The eDQE for the Siemens system at 1 mm{sup ?1} ranged between 0.15 and 0.27, depending on T/F and grid setting. For the Hologic system, eDQE at 1 mm{sup ?1} varied from 0.15 to 0.32, again depending on T/F and grid setting. The eDQE results for both systems showed that the grid increased the system efficiency for PMMA thicknesses of 40 mm and above but showed only small sensitivity to T/F setting. While results of the SdNR and d? based FOMs confirmed the eDQE grid position results, they were also more specific in terms of T/F selection. For the Siemens system at 20 mm PMMA, the FOMs indicated Mo/Mo (grid out) as optimal while W/Rh (grid in) was the optimal configuration at 40, 60, and 70 mm PMMA. For the Hologic, the FOMs pointed to W/Rh (grid in) at 20 and 40 mm of PMMA while W/Ag (grid in) gave the highest FOM at 60 and 70 mm PMMA. Finally, DQE at 1 mm{sup ?1} averaged for the four beam qualities studied was 0.44 0.02 and 0.55 0.03 for the Siemens and Hologic detectors, respectively, indicating only a small influence of energy on detector DQE.Conclusions: Both the DQE and eDQE data showed only a small sensitivity to T/F setting for these two systems. The eDQE showed clear preferences in terms of scatter reduction, being highest for the grid-in geometry for PMMA thicknesses of 40 mm and above. The SdNR and d? based figures of merit, which contain additional weighting for contrast and dose, pointed to specific T/F settings for both systems.

Salvagnini, Elena [UZ Gasthuisberg, Medical Imaging Research Center and Department of Radiology, Herestraat 49, B-3000 Leuven, Belgium and SCK-CEN, Boeretang 200, B-2400 Mol (Belgium)] [UZ Gasthuisberg, Medical Imaging Research Center and Department of Radiology, Herestraat 49, B-3000 Leuven, Belgium and SCK-CEN, Boeretang 200, B-2400 Mol (Belgium); Bosmans, Hilde; Marshall, Nicholas W. [UZ Gasthuisberg, Medical Imaging Research Center and Department of Radiology, Herestraat 49, B-3000 Leuven (Belgium)] [UZ Gasthuisberg, Medical Imaging Research Center and Department of Radiology, Herestraat 49, B-3000 Leuven (Belgium); Struelens, Lara [SCK-CEN, Boeretang 200, B-2400 Mol (Belgium)] [SCK-CEN, Boeretang 200, B-2400 Mol (Belgium)

2013-10-15T23:59:59.000Z

491

Method for assessing motor insulation on operating motors  

DOE Patents [OSTI]

A method for monitoring the condition of electrical-motor-driven devices. The method is achieved by monitoring electrical variables associated with the functioning of an operating motor, applying these electrical variables to a three phase equivalent circuit and determining non-symmetrical faults in the operating motor based upon symmetrical components analysis techniques.

Kueck, John D. (Oak Ridge, TN); Otaduy, Pedro J. (Oak Ridge, TN)

1997-01-01T23:59:59.000Z

492

Method for assessing motor insulation on operating motors  

DOE Patents [OSTI]

A method for monitoring the condition of electrical-motor-driven devices is disclosed. The method is achieved by monitoring electrical variables associated with the functioning of an operating motor, applying these electrical variables to a three phase equivalent circuit and determining non-symmetrical faults in the operating motor based upon symmetrical components analysis techniques. 15 figs.

Kueck, J.D.; Otaduy, P.J.

1997-03-18T23:59:59.000Z

493

Contributing to Net Zero Building: High Energy Efficient EIFS Wall Systems  

SciTech Connect (OSTI)

The team led by Dow Corning collaborated to increase the thermal performance of exterior insulation and finishing systems (EIFS) to reach R-40 performance meeting the needs for high efficiency insulated walls. Additionally, the project helped remove barriers to using EIFS on retrofit commercial buildings desiring high insulated walls. The three wall systems developed within the scope of this project provide the thermal performance of R-24 to R-40 by incorporating vacuum insulation panels (VIPs) into an expanded polystyrene (EPS) encapsulated vacuum insulated sandwich element (VISE). The VISE was incorporated into an EIFS as pre-engineered insulation boards. The VISE is installed using typical EIFS details and network of trained installers. These three wall systems were tested and engineered to be fully code compliant as an EIFS and meet all of the International Building Code structural, durability and fire test requirements for a code compliant exterior wall cladding system. This system is being commercialized under the trade name Dryvit Outsulation HE system. Full details, specifications, and application guidelines have been developed for the system. The system has been modeled both thermally and hygrothermally to predict condensation potential. Based on weather models for Baltimore, MD; Boston, MA; Miami, FL; Minneapolis, MN; Phoenix, AZ; and Seattle, WA; condensation and water build up in the wall system is not a concern. Finally, the team conducted a field trial of the system on a building at the former Brunswick Naval Air Station which is being redeveloped by the Midcoast Regional Redevelopment Authority (Brunswick, Maine). The field trial provided a retrofit R-30 wall onto a wood frame construction, slab on grade, 1800 ft2 building, that was monitored over the course of a year. Simultaneous with the fa鏰de retrofit, the building抯 windows were upgraded at no charge to this program. The retrofit building used 49% less natural gas during the winter of 2012 compared to previous winters. This project achieved its goal of developing a system that is constructible, offers protection to the VIPs, and meets all performance targets established for the project.

Carbary, Lawrence D. [Dow Corning Corporation] [Dow Corning Corporation; Perkins, Laura L. [Dow Corning Corporation] [Dow Corning Corporation; Serino, Roland [Dryvit Systems, Inc] [Dryvit Systems, Inc; Preston, Bill [Dryvit Systems, Inc] [Dryvit Systems, Inc; Kosny, Jan [Fraunhofer USA, Inc. CSE] [Fraunhofer USA, Inc. CSE

2014-01-29T23:59:59.000Z

494

Energy Efficiency Revitalization  

E-Print Network [OSTI]

To set the tone for my remarks I will start by saying- today, energy efficiency is a tough sell. In General Motors, our plant engineering people, faced with headcount deductions, budget cuts, and capital spending constraints are up to their 搚ou...

Kelly, R. L.

495

E-Print Network 3.0 - alternating current motors Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

of Astronomy, University of Arizona Collection: Physics 3 ELSEVIER Electric Power Systems Research 42 (1997) 225-228 A model for induction motor aggregation for power system...

496

ENERGY EFFICIENCY OPPORTUNITIES IN THE U.S. PULP AND PAPER INDUSTRY  

E-Print Network [OSTI]

CHP) units, one steam turbine, and a steam accumulator. Theand power (CHP) Steam expansion turbines Motor Systems MotorPinch analysis Steam injected gas turbines Cogeneration of

Kramer, Klaas Jan

2010-01-01T23:59:59.000Z

497

Electric motor model repair specifications  

SciTech Connect (OSTI)

These model repair specifications list the minimum requirements for repair and overhaul of polyphase AC squireel cage induction motors. All power ranges, voltages, and speeds of squirrel cage motors are covered.

NONE

1995-08-01T23:59:59.000Z

498

GUIDE TO CALCULATING TRANSPORT EFFICIENCY OF AEROSOLS IN OCCUPATIONAL AIR SAMPLING SYSTEMS  

SciTech Connect (OSTI)

This report will present hand calculations for transport efficiency based on aspiration efficiency and particle deposition losses. Because the hand calculations become long and tedious, especially for lognormal distributions of aerosols, an R script (R 2011) will be provided for each element examined. Calculations are provided for the most common elements in a remote air sampling system, including a thin-walled probe in ambient air, straight tubing, bends and a sample housing. One popular alternative approach would be to put such calculations in a spreadsheet, a thorough version of which is shared by Paul Baron via the Aerocalc spreadsheet (Baron 2012). To provide greater transparency and to avoid common spreadsheet vulnerabilities to errors (Burns 2012), this report uses R. The particle size is based on the concept of activity median aerodynamic diameter (AMAD). The AMAD is a particle size in an aerosol where fifty percent of the activity in the aerosol is associated with particles of aerodynamic diameter greater than the AMAD. This concept allows for the simplification of transport efficiency calculations where all particles are treated as spheres with the density of water (1 g?cm-3). In reality, particle densities depend on the actual material involved. Particle geometries can be very complicated. Dynamic shape factors are provided by Hinds (Hinds 1999). Some example factors are: 1.00 for a sphere, 1.08 for a cube, 1.68 for a long cylinder (10 times as long as it is wide), 1.05 to 1.11 for bituminous coal, 1.57 for sand and 1.88 for talc. Revision 1 is made to correct an error in the original version of this report. The particle distributions are based on activity weighting of particles rather than based on the number of particles of each size. Therefore, the mass correction made in the original version is removed from the text and the calculations. Results affected by the change are updated.

Hogue, M.; Hadlock, D.; Thompson, M.; Farfan, E.

2013-11-12T23:59:59.000Z

499

Motor Systems | Department of Energy  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: AlternativeEnvironment, SafetyWaterMary Landrieu AboutBenefitsWinners of FirstSources

500

Empire Electric Association- Residential Energy Efficiency Credit Program  

Broader source: Energy.gov [DOE]

Empire Electric Association provides rebates for its commercial customers who upgrade to energy efficient lighting, HVAC equipment, and motors. 燭hese rebates are offered in conjunction with [http:...