National Library of Energy BETA

Sample records for leds displace cold

  1. LED

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

    ... Cost The high-brightness, rapidly pulsed, multicolor light-emitting diode (LED) driver delivers lighting performance that exceeds that of conventional (laserarc-light) sources ...

  2. Dynamic displacements of the RHIC dipole cold mass with injection molded composite posts during quench conditions

    SciTech Connect (OSTI)

    Sondericker, J. Wolf, L.J.

    1991-02-01

    The new design of the RHIC dipole magnets incorporate helium containment bellows having a convolution diameter of only 7.63 inches. The present bellows are 12.80 inches in diameter. The smaller bellows present a substantially reduced pressure area which can be expected to reduce proportionately the end force on the cold mass during a quench. But, the objection was raised that the smaller bellows would present greater obstruction to the helium flow during a quench thereby producing higher pressure differentials. This analysis was undertaken to address these assertions by predicting the dynamic displacements of the cold mass using the latest test data on the stiffness of the IMC posts, pressure-time histories acquired from the recent full cell tests of RHIC magnets, and the dimensions of the new expansion joints. The analysis treated the cold mass as an elastic body having a saggittal curvature. The technique of normal mode expansion of a lumped-parameter system was used to obtain the results and conclusions reported herein.

  3. Prospects for LED lighting.

    SciTech Connect (OSTI)

    Tsao, Jeffrey Yeenien; Gee, James Martin; Simmons, Jerry Alvon

    2003-08-01

    Solid-state lighting using light-emitting diodes (LEDs) has the potential to reduce energy consumption for lighting by 50% while revolutionizing the way we illuminate our homes, work places, and public spaces. Nevertheless, substantial technical challenges remain in order for solid-state lighting to significantly displace the well-developed conventional lighting technologies. We review the potential of LED solid-state lighting to meet the long-term cost goals.

  4. LED Pulser

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

    ... Cost The high-brightness, rapidly pulsed, multicolor light-emitting diode (LED) driver delivers lighting performance that exceeds that of conventional (laserarc-light) sources ...

  5. LED Update

    SciTech Connect (OSTI)

    Johnson, Mark L.; Gordon, Kelly L.

    2006-09-01

    This article, which will appear in RESIDENTIAL LIGHTING MAGAZINE, interviews PNNL's Kelly Gordon and presents the interview in question and answer format. The topic is a light emitting diode (LED) lighting also known as solid state lighting. Solid state lighting will be a new category in an energy efficient lighting fixture design competition called Lighting for Tomorrow sponsored by the US Department of Energy Emerging Technologies Office, the American Institute for Lighting, and the Consortium for Energy Efficiency. LED technology has been around since the ’60s, but it has been used mostly for indicator lights on electronics equipment. The big breakthrough was the development in the 1990s of blue LEDs which can be combined with the red and green LEDs that already existed to make white light. LEDs produce 25 to 40 lumens of light per watt of energy used, almost as much as a CFL (50 lumens per watt) and much more efficient than incandescent sources, which are around 15 lumens per watt. They are much longer lived and practical in harsh environments unsuitable for incandescent lighting. They are ready for niche applications now, like under-counter lighting and may be practical for additional applications as technological challenges are worked out and the technology is advancing in leaps and bounds.

  6. LED lamp

    DOE Patents [OSTI]

    Galvez, Miguel; Grossman, Kenneth; Betts, David

    2013-11-12

    There is herein described a lamp for providing white light comprising a plurality of light sources positioned on a substrate. Each of said light sources comprises a blue light emitting diode (LED) and a dome that substantially covers said LED. A first portion of said blue light from said LEDs is transmitted through said domes and a second portion of said blue light is converted into a red light by a first phosphor contained in said domes. A cover is disposed over all of said light sources that transmits at least a portion of said red and blue light emitted by said light sources. The cover contains a second phosphor that emits a yellow light in response to said blue light. The red, blue and yellow light combining to form the white light and the white light having a color rendering index (CRI) of at least about 80.

  7. Lateral displacement and rotational displacement sensor

    DOE Patents [OSTI]

    Duden, Thomas

    2014-04-22

    A position measuring sensor formed from opposing sets of capacitor plates measures both rotational displacement and lateral displacement from the changes in capacitances as overlapping areas of capacitors change. Capacitances are measured by a measuring circuit. The measured capacitances are provided to a calculating circuit that performs calculations to obtain angular and lateral displacement from the capacitances measured by the measuring circuit.

  8. Displacer for Stirling engine

    SciTech Connect (OSTI)

    Brown, A. T.

    1985-12-24

    In a Stirling engine and the like, a displacer piston having a plurality of internal baffles and insulation so as to prevent undesired heat transfer across the displacer piston.

  9. LED Color Characteristics

    SciTech Connect (OSTI)

    2012-01-01

    Color quality is an important consideration when evaluating LED-based products for general illumination. This fact sheet reviews the basics regarding light and color and summarizes the most important color issues related to white-light LED systems.

  10. LED Color Characteristics

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

    LED Color Characteristics Color quality is an important consideration when evaluating lighting products. This fact sheet reviews the fundamentals regarding light and color, summarizing the most important color issues related to white-light LED systems, including color consistency, stability, tuning, and rendering, as well as chromaticity. LED Emission Attributes Individual LED dies, often referred to as chips, emit light in a narrow range of wavelengths, giving the appearance of a monochromatic

  11. Energy Efficiency of LEDs

    Broader source: Energy.gov [DOE]

    This fact sheet discusses the current state of the LED market and discusses package efficacy, luminaire efficacy, and application efficacy.

  12. Cree LED Lighting Solutions Formerly LED Lighting Fixtures LLF...

    Open Energy Info (EERE)

    LED Lighting Solutions Formerly LED Lighting Fixtures LLF Jump to: navigation, search Name: Cree LED Lighting Solutions (Formerly LED Lighting Fixtures (LLF)) Place: Morrisville,...

  13. Precision displacement reference system

    DOE Patents [OSTI]

    Bieg, Lothar F.; Dubois, Robert R.; Strother, Jerry D.

    2000-02-22

    A precision displacement reference system is described, which enables real time accountability over the applied displacement feedback system to precision machine tools, positioning mechanisms, motion devices, and related operations. As independent measurements of tool location is taken by a displacement feedback system, a rotating reference disk compares feedback counts with performed motion. These measurements are compared to characterize and analyze real time mechanical and control performance during operation.

  14. LED MR16 Lamps

    SciTech Connect (OSTI)

    2012-07-01

    Solid-state lighting program technology fact sheet that describes the performance of LED MR16 lamps and discusses electronic compatibility concerns.

  15. Establishing LED Equivalency

    SciTech Connect (OSTI)

    2011-10-01

    Solid-state lighting program technology fact sheet that provides guidance for comparing products based on LED or other light source technologies.

  16. LED Color Stability

    SciTech Connect (OSTI)

    2014-03-01

    DOE Solid-State Lighting program technology fact sheet that addresses key questions about color stability and color shift in LED lighting applications.

  17. General Service LED Lamps

    SciTech Connect (OSTI)

    2012-04-01

    Solid-state lighting program technology fact sheet that compares general service incandescent lamps—i.e., light bulbs—to LED and CFL alternatives.

  18. LED Street Lighting

    Energy Savers [EERE]

    1, 2016 LED Street Lighting The American Medical Association's (AMA) recently adopted community guidance on street lighting adds another influential voice to issues that have been ...

  19. Recessed LED Downlights

    SciTech Connect (OSTI)

    2012-05-01

    Solid-state lighting program technology fact sheet that briefly discusses different LED product types and their performance relative to downlights utilizing traditional lamps.

  20. LED Color Characteristics

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

    a combina- tion of colored LEDs typically red, green, and blue (RGB) are also available. ... triphosphor uorescent, utilize a combination of red-, blue-, and green-emitting phosphors. ...

  1. General Service LED Lamps

    Broader source: Energy.gov [DOE]

    A U.S. DOE SSL technology fact sheet that compares general service LED light bulbs with incandescent and CFL bulbs.

  2. high-power LEDs

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

    ... Cost The high-brightness, rapidly pulsed, multicolor light-emitting diode (LED) driver delivers lighting performance that exceeds that of conventional (laserarc-light) sources ...

  3. LED Frequently Asked Questions

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

    Courtesy of Osram Opto Semiconductor. LED light sources used in a residential application. Terms SSL - solid-state lighting; umbrella term for semiconductors used to convert ...

  4. cold standby

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

    Initially, the Department's Office of Nuclear Energy, Science and Technology (Nuclear Energy) coordinated the end of Cold Standby with the deployment of a government-funded gas ...

  5. Energy Efficiency of LEDs

    SciTech Connect (OSTI)

    2013-03-01

    Solid-state lighting program technology fact sheet on energy efficiency of LEDs, characterizing the current state of the market and discussing package efficacy, luminaire efficacy, and application efficacy.

  6. LED Directional Lamps

    SciTech Connect (OSTI)

    2012-11-01

    Solid-state lighting program technology fact sheet that provides an overview of the current performance of LED PAR-, BR-, R-, and AR-shaped lamps, which were all investigated by CALiPER in 2012.

  7. Optical Safety of LEDs

    SciTech Connect (OSTI)

    none,

    2013-06-01

    Solid-state lighting program technology fact sheet that clarifies the issue of LED lighting safety for the human eye and takes a look at current standards for photobiological safety.

  8. LED Frequently Asked Questions

    SciTech Connect (OSTI)

    2011-05-01

    Solid-state lighting program technology fact sheet that provides an overview of what retailers, energy efficiency advocates, and consumers need to know to make informed LED buying decisions.

  9. Water displacement mercury pump

    DOE Patents [OSTI]

    Nielsen, Marshall G.

    1985-01-01

    A water displacement mercury pump has a fluid inlet conduit and diffuser, a valve, a pressure cannister, and a fluid outlet conduit. The valve has a valve head which seats in an opening in the cannister. The entire assembly is readily insertable into a process vessel which produces mercury as a product. As the mercury settles, it flows into the opening in the cannister displacing lighter material. When the valve is in a closed position, the pressure cannister is sealed except for the fluid inlet conduit and the fluid outlet conduit. Introduction of a lighter fluid into the cannister will act to displace a heavier fluid from the cannister via the fluid outlet conduit. The entire pump assembly penetrates only a top wall of the process vessel, and not the sides or the bottom wall of the process vessel. This insures a leak-proof environment and is especially suitable for processing of hazardous materials.

  10. Optical displacement sensor

    DOE Patents [OSTI]

    Carr, Dustin W.

    2008-04-08

    An optical displacement sensor is disclosed which uses a vertical-cavity surface-emitting laser (VCSEL) coupled to an optical cavity formed by a moveable membrane and an output mirror of the VCSEL. This arrangement renders the lasing characteristics of the VCSEL sensitive to any movement of the membrane produced by sound, vibrations, pressure changes, acceleration, etc. Some embodiments of the optical displacement sensor can further include a light-reflective diffractive lens located on the membrane or adjacent to the VCSEL to control the amount of lasing light coupled back into the VCSEL. A photodetector detects a portion of the lasing light from the VCSEL to provide an electrical output signal for the optical displacement sensor which varies with the movement of the membrane.

  11. Water displacement mercury pump

    DOE Patents [OSTI]

    Nielsen, M.G.

    1984-04-20

    A water displacement mercury pump has a fluid inlet conduit and diffuser, a valve, a pressure cannister, and a fluid outlet conduit. The valve has a valve head which seats in an opening in the cannister. The entire assembly is readily insertable into a process vessel which produces mercury as a product. As the mercury settles, it flows into the opening in the cannister displacing lighter material. When the valve is in a closed position, the pressure cannister is sealed except for the fluid inlet conduit and the fluid outlet conduit. Introduction of a lighter fluid into the cannister will act to displace a heavier fluid from the cannister via the fluid outlet conduit. The entire pump assembly penetrates only a top wall of the process vessel, and not the sides or the bottom wall of the process vessel. This insures a leak-proof environment and is especially suitable for processing of hazardous materials.

  12. LED MR16 Lamps

    Office of Energy Efficiency and Renewable Energy (EERE)

    The following CALiPER report provides detailed analysis of LED MR16 lamp performance, covering basic performance characteristics as well as subjective evaluation of beam, shadow, and color quality. Pending reports will offer analysis on performance attributes that are not captured by LM-79 testing. These reports are intended to educate the industry on market trends, potential issues, and important areas for improvement.

  13. LEDS | OpenEI Community

    Open Energy Info (EERE)

    LEDS Home Graham7781's picture Submitted by Graham7781(2017) Super contributor 16 November, 2012 - 11:23 LEDS the focus of Monday's 10 a.m. Town Hall Meeting LEDS Town Hall meeting...

  14. LED Basics | Department of Energy

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

    SSL Basics » LED Basics LED Basics Unlike incandescent lamps, LEDs are not inherently white light sources. Instead, LEDs emit nearly monochromatic light, making them highly efficient for colored light applications such as traffic lights and exit signs. However, to be used as a general light source, white light is needed. White light can be achieved with LEDs in three ways: Phosphor conversion, in which a phosphor is used on or near the LED to convert the colored light to white light RGB

  15. Advanced Leds | Open Energy Information

    Open Energy Info (EERE)

    Place: Coventry, England, United Kingdom Zip: CV5 6SP Product: Advanced Leds develops LED technology for outdoor lighting, including street lighting applications. Coordinates:...

  16. LED Performance Under Tough Conditions

    Energy Savers [EERE]

    Three DOE Gateway applications show how LED luminaires respond to rigorous outdoor environments By JAmes BroDrick A lthough LED lighting has already made impressive inroads in ...

  17. COLD TRAP

    DOE Patents [OSTI]

    Milleron, N.

    1963-03-12

    An improved linear-flow cold trap is designed for highvacuum applications such as mitigating back migration of diffusion pump oil moiecules. A central pot of liquid nitrogen is nested within and supported by a surrounding, vertical, helical coil of metai sheet, all enveloped by a larger, upright, cylindrical, vacuum vessel. The vertical interstices between successive turns of the coil afford lineal, axial, high-vacuum passages between open mouths at top and bottom of said vessel, while the coil, being cold by virtue of thermal contact of its innermost turn with the nitrogen pot, affords expansive proximate condensation surfaces. (AEC)

  18. LEd:JCD

    Office of Legacy Management (LM)

    LEd:JCD TO- 54 k-sour R3scsrck Fouadatlon 0f$..&+0is$tlstituta of TecGJlow Tecmolocy Csilter 10 Zest 35th Stmet ', c!xk3go lo, I3.Umie Atteqtion: MC. R. c. Barrall Gentlemen: Reference is wada to (a) your appUcetio0 of 3awe~ q,' 1959, rrqlacst~alirpn~tonori~200gsr;ls~hi~4~ched oranlm, (b) our a-q.4 of Z'ebmazy 6, lYS9, ke<wthg eddi- tiona1 'L+lmrQdiEp ia 'Support of your applJcatloD, (c) ycxu.r telqr3a of Eqtember 29, 1959, reque5tlng reneval of ~cense sm-49 -vc+biTt cksnga. Since'va kaem

  19. Property:DisplacementMeasurement | Open Energy Information

    Open Energy Info (EERE)

    String Description MHK Displacement Measurement Categories Used in FormTemplate MHKSensor & MHKInstrument Allows Values 3-axis (Displacement);2-axis (Displacement);1-axis...

  20. Variable displacement blower

    DOE Patents [OSTI]

    Bookout, Charles C.; Stotts, Robert E.; Waring, Douglass R.; Folsom, Lawrence R.

    1986-01-01

    A blower having a stationary casing for rotatably supporting a rotor assembly having a series of open ended chambers arranged to close against the surrounding walls of the casing. Pistons are slidably mounted within each chamber with the center of rotation of the pistons being offset in regard to the center of rotation of the rotor assembly whereby the pistons reciprocate in the chambers as the rotor assembly turns. As inlet port communicates with the rotor assembly to deliver a working substance into the chamber as the pistons approach a top dead center position in the chamber while an outlet port also communicates with the rotor to exhaust the working substance as the pistons approach a bottom dead center position. The displacement of the blower is varied by adjusting the amount of eccentricity between the center of rotation of the pistons and the center of rotation of the rotor assembly.

  1. DOE Announces Webinars on Maintenance Practices for LED Streetlights, LED

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

    Color Stability, and More | Department of Energy Maintenance Practices for LED Streetlights, LED Color Stability, and More DOE Announces Webinars on Maintenance Practices for LED Streetlights, LED Color Stability, and More April 10, 2014 - 9:13am Addthis EERE offers webinars to the public on a range of subjects, from adopting the latest energy efficiency and renewable energy technologies to training for the clean energy workforce. Webinars are free; however, advanced registration is

  2. Simple Modular LED Cost Model

    Broader source: Energy.gov [DOE]

    The LED Cost Model, developed by the DOE Cost Modeling Working Group, provides a simplified method for analyzing the manufacturing costs of an LED package. The model focuses on the major cost...

  3. LED Performance Under Tough Conditions

    Broader source: Energy.gov [DOE]

    December 2015 LD+A magazine article entitled "LED Performance Under Tough Conditions" discussing three Dept of Energy GATEWAY applications that show how LED luminaires respond to rigorous outdoor environments.

  4. Employee-Led Safety Committees

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

    Employee-Led Safety Committees Presented to: 25 th National VPPPA Conference August 26, 2009 San Antonio, Texas Presented by: Jack Griffith HNF-421781 CHPRC0907-38 2 Employee-Led ...

  5. LED Lighting | Department of Energy

    Office of Environmental Management (EM)

    comparable or better light quality than other types of lighting. Check out the top 8 things you didn't know about LEDs to learn more. Energy Savings LED is a highly energy...

  6. COLD TRAPS

    DOE Patents [OSTI]

    Thompson, W.I.

    1958-09-30

    A cold trap is presented for removing a condensable component from a gas mixture by cooling. It consists of a shell, the exterior surface of which is chilled by a refrigerant, and conductive fins welded inside the shell to condense the gas, and distribute the condensate evenly throughout the length of the trap, so that the trap may function until it becomes completely filled with the condensed solid. The contents may then be removed as either a gas or as a liquid by heating the trap. This device has particuinr use as a means for removing uranium hexafluoride from the gaseous diffusion separation process during equipment breakdown and repair periods.

  7. LED Roundtable Reports | Department of Energy

    Energy Savers [EERE]

    LED Roundtable Reports LED Roundtable Reports PDF icon 2015 LED Core Technology Roundtable Report.pdf PDF icon 2015 LED Product Development and Manufacturing Roundtable Report.pdf...

  8. LED Green Power Inc | Open Energy Information

    Open Energy Info (EERE)

    LED Green Power Inc Jump to: navigation, search Name: LED Green Power Inc Place: Santa Cruz, California Zip: 95060 Product: LED fixture and cartridge manufacturer. References: LED...

  9. LED Roundtable Reports | Department of Energy

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

    LED Roundtable Reports LED Roundtable Reports PDF icon 2015 LED Core Technology Roundtable Report.pdf PDF icon 2015 LED Product Development and Manufacturing Roundtable Report.pdf ...

  10. LED Record Efficacy and Brightness

    Broader source: Energy.gov [DOE]

    Designed for general lighting applications such as street, industrial, and parking garage lighting, the Cree XLamp® power LED sets new records for LED brightness and efficacy, up to 85 lm/W at 350 mA. The XLamp utilizes Cree's performance breakthrough EZBright™ LED chip; both products include technology that was developed in part with R&D funding support from DOE.

  11. Using LEDs | Department of Energy

    Energy Savers [EERE]

    compact profile, superior optical control, energy efficiency, breakage resistance, reduced maintenance, and long life-LEDs are well suited to a variety of lighting applications. ...

  12. Demonstration of LED Street Lighting

    SciTech Connect (OSTI)

    Kinzey, B. R.; Royer, M. P.; Hadjian, M.; Kauffman, R.

    2013-06-01

    GATEWAY program and Municipal Solid-State Street Lighting Consortium report on a demonstration of LED street lighting in Kansas City, MO.

  13. Upgrading Troffer Luminaires to LED

    SciTech Connect (OSTI)

    none,

    2014-01-31

    Solid-state lighting technology fact sheet providing guidance on the various factors to consider when deciding on an LED upgrade for a fluorescent troffer system.

  14. LED Lighting | Department of Energy

    Office of Environmental Management (EM)

    of lighting in the United States. Residential LEDs -- especially ENERGY STAR rated products -- use at least 75% less energy, and last 25 times longer, than incandescent lighting. ...

  15. GATEWAY Demonstrations: LED Street Lighting

    SciTech Connect (OSTI)

    Cook, Tyson; Shackelford, Jordan; Pang, Terrance Pang

    2008-12-01

    This report summarizes an assessment project conducted to study the performance of light emitting diode (LED) luminaires in a street lighting application in San Francisco, CA.

  16. Reporting LED Luminaire Product Performance

    SciTech Connect (OSTI)

    2008-12-01

    This brochure on LED product performance is an outcome of a joint DOE-NGLIA effort to assure and improve the quality of SSL products.

  17. Regenerative rotary displacer Stirling engine

    SciTech Connect (OSTI)

    Isshiki, Naotsugu; Watanabe, Hiroichi; Raggi, L.; Isshiki, Seita; Hirata, Koichi

    1996-12-31

    A few rotary displacer Stirling engines in which the displacer has one gas pocket space at one side and rotates in a main enclosed cylinder, which is heated from one side and cooled from opposite side without any regenerator, have been studied for some time by the authors. The authors tried to improve this engine by equipping it with a regenerator, because without a regenerator, pressure oscillation and efficiency are too small. Here, several types of regenerative rotary displacer piston Stirling engines are proposed. One is the contra-rotating tandem two disc type displacer engine using axial heat conduction through side walls or by heat pipes and another is a single disc type with circulating fluid regenerator or heat pipes. Stirling engines of this new rotary displacer type are thought to attain high speed. Here, experimental results of the original rotary displacer Stirling engine without a regenerator, and one contra-rotating tandem displacer engine with side wall regenerator by axial heat conduction are reported accompanied with a discussion of the results.

  18. Borehole optical lateral displacement sensor

    DOE Patents [OSTI]

    Lewis, R.E.

    1998-10-20

    There is provided by this invention an optical displacement sensor that utilizes a reflective target connected to a surface to be monitored to reflect light from a light source such that the reflected light is received by a photoelectric transducer. The electric signal from the photoelectric transducer is then imputed into electronic circuitry to generate an electronic image of the target. The target`s image is monitored to determine the quantity and direction of any lateral displacement in the target`s image which represents lateral displacement in the surface being monitored. 4 figs.

  19. Displacement sensing system and method

    DOE Patents [OSTI]

    VunKannon, Jr., Robert S

    2006-08-08

    A displacement sensing system and method addresses demanding requirements for high precision sensing of displacement of a shaft, for use typically in a linear electro-dynamic machine, having low failure rates over multi-year unattended operation in hostile environments. Applications include outer space travel by spacecraft having high-temperature, sealed environments without opportunity for servicing over many years of operation. The displacement sensing system uses a three coil sensor configuration, including a reference and sense coils, to provide a pair of ratio-metric signals, which are inputted into a synchronous comparison circuit, which is synchronously processed for a resultant displacement determination. The pair of ratio-metric signals are similarly affected by environmental conditions so that the comparison circuit is able to subtract or nullify environmental conditions that would otherwise cause changes in accuracy to occur.

  20. LED Watch: How Safe Is the Light from LEDs?

    Energy Savers [EERE]

    It's important to note that there's about LED safety focus on what's known no difference between the type of vis- as "blue light," which is light in the violet ible radiant energy ...

  1. Cold energy

    SciTech Connect (OSTI)

    Wallace, John P.

    2015-12-04

    Deviations in Q for resonant superconducting radio frequency niobium accelerator cavities are generally correlated with resistivity loss mechanisms. Field dependent Qs are not well modeled by these classical loss mechanisms, but rather can represent a form of precision cavity surface thermometry. When the field dependent Q variation shows improvement with increasing B field level the classical treatment of this problem is inadequate. To justify this behavior hydrogen as a ubiquitous impurity in niobium, which creates measurable property changes, even at very low concentrations is typically considered the cause of such anomalous behavior. This maybe the case in some instances, but more importantly any system operating with a highly coherent field with a significant time dependent magnetic component at near 2° K will have the ability to organize the remaining free spins within the London penetration depth to form a coupled energy reservoir in the form of low mass spin waves. The niobium resonant cavities are composed of a single isotope with a large nuclear spin. When the other loss mechanisms are stripped away this may be the gain medium activated by the low level residual magnetic fields. It was found that one resonant cavity heat treatment produced optimum surface properties and then functioned as a MASER extracting energy from the 2° K thermal bath while cooling the cavity walls. The cavity operating in this mode is a simulator of what can take place in the wider but not colder universe using the cosmic microwave background (CMB) as a thermal source. The low mass, long lifetimes, and the scale of the magnetic spin waves on the weakly magnetized interstellar medium allows energy to be stored that is many orders of magnitude colder than the cosmic microwave background. A linear accelerator cavity becomes a tool to explore the properties of the long wave length magnetic spin waves that populate this cold low energy regime.

  2. Metacapacitors for LED Lighting: Metacapacitors

    SciTech Connect (OSTI)

    2010-09-02

    ADEPT Project: The CUNY Energy Institute is developing less expensive, more efficient, smaller, and longer-lasting power converters for energy-efficient LED lights. LEDs produce light more efficiently than incandescent lights and last significantly longer than compact fluorescent bulbs, but they require more sophisticated power converter technology, which increases their cost. LEDs need more sophisticated converters because they require a different type of power (low voltage direct current, or DC) than what's generally supplied by power outlets. The CUNY Energy Institute is developing sophisticated power converters for LEDs that contain capacitors made from new, nanoscale materials. Capacitors are electrical components that are used to store energy. CUNY's unique capacitors are configured with advanced power circuits to more efficiently control and convert power to the LED lighting source. They also eliminate the need for large magnetic components, instead relying on networks of capacitors that can be easily printed on plastic substrate. CUNY's prototype LED power converter already meets DOE's 2020 projections for the energy efficiency of LED power converters.

  3. Maintenance Practices for LED Streetlights

    Office of Energy Efficiency and Renewable Energy (EERE)

    This April 14, 2014 webinar answered important questions about the maintenance and reliability of LED streetlights, and how to take these issues into account when planning and preparing for a...

  4. LED Lighting | Department of Energy

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

    focusing light in ways that are useful in homes and commercial settings. The light-emitting diode (LED) is one of today's most energy-efficient and rapidly-developing lighting...

  5. Demonstration Assessment of LED Roadway Lighting: Philadelphia...

    Office of Scientific and Technical Information (OSTI)

    LED Roadway Lighting: Philadelphia, PA Royer, Michael P.; Tuenge, Jason R.; Poplawski, Michael E. Roadway Lighting; Solid-state lighting; LED lighting; SSL; LED; GATEWAY Roadway...

  6. LED Frequently Asked Questions | Department of Energy

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

    Frequently Asked Questions LED Frequently Asked Questions EERE Solid-State Lighting LED Factsheet PDF icon ledbasics.pdf More Documents & Publications LED Frequently Asked ...

  7. Recessed LED Downlights | Department of Energy

    Energy Savers [EERE]

    Recessed LED Downlights Recessed LED Downlights A Dept of Energy Solid-State Lighting Program technology fact sheet on recessed LED downlights. PDF icon recesseddownlight.pdf More ...

  8. Rotor component displacement measurement system

    DOE Patents [OSTI]

    Mercer, Gary D.; Li, Ming C.; Baum, Charles R.

    2003-05-27

    A measuring system for measuring axial displacement of a tube relative to an axially stationary component in a rotating rotor assembly includes at least one displacement sensor adapted to be located normal to a longitudinal axis of the tube; an insulated cable system adapted for passage through the rotor assembly; a rotatable proximitor module located axially beyond the rotor assembly to which the cables are connected; and a telemetry system operatively connected to the proximitor module for sampling signals from the proximitor module and forwarding data to a ground station.

  9. Multicolor, High Efficiency, Nanotextured LEDs

    SciTech Connect (OSTI)

    Jung Han; Arto Nurmikko

    2011-09-30

    We report on research results in this project which synergize advanced material science approaches with fundamental optical physics concepts pertaining to light-matter interaction, with the goal of solving seminal problems for the development of very high performance light emitting diodes (LEDs) in the blue and green for Solid State Lighting applications. Accomplishments in the duration of the contract period include (i) heteroepitaxy of nitrogen-polar LEDs on sapphire, (ii) heteroepitaxy of semipolar (11{bar 2}2) green LEDs on sapphire, (iii) synthesis of quantum-dot loaded nanoporous GaN that emits white light without phosphor conversion, (iv) demonstration of the highest quality semipolar (11{bar 2}2) GaN on sapphire using orientation-controlled epitaxy, (v) synthesis of nanoscale GaN and InGaN medium, and (vi) development of a novel liftoff process for manufacturing GaN thin-film vertical LEDs. The body of results is presented in this report shows how a solid foundation has been laid, with several noticeable accomplishments, for innovative research, consistent with the stated milestones.

  10. LED lamp power management system and method

    DOE Patents [OSTI]

    Gaines, James; Clauberg, Bernd; Van Erp, Josephus A. M.

    2013-03-19

    An LED lamp power management system and method including an LED lamp having an LED controller 58; a plurality of LED channels 60 operably connected to the LED controller 58, each of the plurality of LED channels 60 having a channel switch 62 in series with at least one shunted LED circuit 83, the shunted LED circuit 83 having a shunt switch 68 in parallel with an LED source 80. The LED controller 58 reduces power loss in one of the channel switch 62 and the shunt switch 68 when LED lamp electronics power loss (P.sub.loss) exceeds an LED lamp electronics power loss limit (P.sub.lim); and each of the channel switches 62 receives a channel switch control signal 63 from the LED controller 58 and each of the shunt switches 68 receives a shunt switch control signal 69 from the LED controller 58.

  11. LED lamp color control system and method

    SciTech Connect (OSTI)

    Gaines, James; Clauberg, Bernd; Van Erp, Josephus A.M.

    2013-02-05

    An LED lamp color control system and method including an LED lamp having an LED controller 58; and a plurality of LED channels 60 operably connected to the LED controller 58, each of the plurality of LED channels 60 having a channel switch 62 in series with at least one shunted LED circuit 83, the shunted LED circuit 83 having a shunt switch 68 in parallel with an LED source 80. The LED controller 58 determines whether the LED source 80 is in a feedback controllable range, stores measured optical flux for the LED source 80 when the LED source 80 is in the feedback controllable range, and bypasses storing the measured optical flux when the LED source 80 is not in the feedback controllable range.

  12. Free displacer and Ringbom displacer for a Malone refrigerator

    SciTech Connect (OSTI)

    Swift, G.W.; Brown, A.O.

    1994-05-01

    Malone refrigeration uses a liquid near its critical point (instead of the customary gas) as the working fluid in a Stirling, Brayton, or similar regenerative or recuperative cycle. Thus far, we have focused on the Stirling cycle, to avoid the difficult construction of the high-pressure-difference counterflow recuperator required for a Brayton machine. Our first Malone refrigerator used liquid propylene (C{sub 3}H{sub 6}) in a double-acting 4-cylinder Stirling configuration. First measurements with a free displacer used in a liquid working fluid are presented. The displacer was operated both in harmonic mode and in Ringbom mode, in liquid carbon dioxide. The results are in reasonable agreement with expectations.

  13. Ventilation by stratification and displacement

    SciTech Connect (OSTI)

    Skaaret, E.

    1983-03-01

    Ventilation effectiveness is not one single index which can be used for classifying ventilating systems. It is shown that a system has different effectivenesses depending on the characteristics of the pollution sources. A transient ventilation effectiveness can be used to generally characterize the system behavior during transient conditions. This index is, for a given system, dependent only on the thermal conditions. Using the different concepts of ventilation effectiveness and knowledge of the nature of the diffusion process it is concluded that the mixing principle in ventilation is not the best one. The displacement principle working vertical-up (air supply directly to the zone of occupation) is generally working much better. Density stratification improves the efficiency. Conditions for stable thermal stratification is dealt with. Room heating systems are concluded to be based on the radiant heating principle. A no recirculating displacement solution using a heat exchanger is claimed to be energy efficient. Research work which substantiated the different conclusions is referenced.

  14. LED MR16 Lamps | Department of Energy

    Energy Savers [EERE]

    LED MR16 Lamps LED MR16 Lamps A U.S. DOE Solid-State Lighting Program technology fact sheet on LED MR16 lamps. PDF icon ledmr16-lamps.pdf More Documents & Publications Report ...

  15. LedEngin Inc | Open Energy Information

    Open Energy Info (EERE)

    LedEngin Inc Jump to: navigation, search Name: LedEngin, Inc Place: Santa Clara, California Zip: 95054 Product: Developer of Light Emitting Diode (LED) technology for medical and...

  16. LED North America - Energy Innovation Portal

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

    Understanding SSL » LED Basics LED Basics Unlike incandescent lamps, LEDs are not inherently white light sources. Instead, LEDs emit nearly monochromatic light, making them highly efficient for colored light applications such as traffic lights and exit signs. However, to be used as a general light source, white light is needed. White light can be achieved with LEDs in three ways: Phosphor conversion, in which a phosphor is used on or near the LED to convert the colored light to white light RGB

  17. How cold is cold dark matter?

    SciTech Connect (OSTI)

    Armendariz-Picon, Cristian; Neelakanta, Jayanth T. E-mail: jtneelak@syr.edu

    2014-03-01

    If cold dark matter consists of particles, these must be non-interacting and non-relativistic by definition. In most cold dark matter models however, dark matter particles inherit a non-vanishing velocity dispersion from interactions in the early universe, a velocity that redshifts with cosmic expansion but certainly remains non-zero. In this article, we place model-independent constraints on the dark matter temperature to mass ratio, whose square root determines the dark matter velocity dispersion. We only assume that dark matter particles decoupled kinetically while non-relativistic, when galactic scales had not entered the horizon yet, and that their momentum distribution has been Maxwellian since that time. Under these assumptions, using cosmic microwave background and matter power spectrum observations, we place upper limits on the temperature to mass ratio of cold dark matter today (away from collapsed structures). These limits imply that the present cold dark matter velocity dispersion has to be smaller than 54 m/s. Cold dark matter has to be quite cold, indeed.

  18. Federally Led Accident Investigation Reports | Department of...

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

    Federally Led Accident Investigation Reports Federally Led Accident Investigation Reports Includes Pre-March 2011 Type A Reports June 1, 1999 Type A Accident Investigation Board...

  19. LED Outdoor Area Lighting Fact Sheet

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

    ... Light distribution and glare LED luminaires use different optics than MH or HPS lamps ... illuminance are possible with LEDs and close-coupled optics, compared to HID luminaires. ...

  20. Philadelphia International Airport Apron Lighting: LED System...

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

    Philadelphia International Airport Apron Lighting: LED System Performance in a Trial Installation Philadelphia International Airport Apron Lighting: LED System Performance in a ...

  1. Interferometric fiber optic displacement sensor

    DOE Patents [OSTI]

    Farah, John

    1999-01-01

    A method is presented to produce a change in the optical path length in the gap between two single mode optical fibers proportional to the lateral displacement of either fiber end normal to its axis. This is done with the use of refraction or diffraction at the interface between a guiding and non-guiding media to change the direction of propagation of the light in the gap. A method is also presented for laying a waveguide on a cantilever so that the displacement of the tip of the cantilever produces a proportional path length change in the gap by distancing the waveguide from the neutral axis of the cantilever. The fiber is supported as a cantilever or a waveguide is deposited on a micromachined cantilever and incorporated in an interferometer which is made totally on a silicon substrate with the use of integrated-optic technology. A resonant element in the form of a micro-bridge is incorporated in the ridge waveguide and produces a frequency output which is readily digitizeable and immune to laser frequency noise. Finally, monolithic mechanical means for phase modulation are provided on the same sensor substrate. This is done by vibrating the cantilever or micro-bridge either electrically or optically.

  2. Interferometric fiber optic displacement sensor

    DOE Patents [OSTI]

    Farah, J.

    1995-05-30

    A method is presented to produce a change in the optical path length in the gap between two single mode optical fibers proportional to the lateral displacement of either fiber end normal to its axis. This is done with the use of refraction or diffraction at the interface between a guiding and non-guiding media to change the direction of propagation of the light in the gap. A method is also presented for laying a waveguide on a cantilever so that the displacement of the tip of the cantilever produces a proportional path length change in the gap by distancing the waveguide from the neutral axis of the cantilever. The fiber is supported as a cantilever or a waveguide is deposited on a micromachined cantilever and incorporated in an interferometer which is made totally on a silicon substrate with the use of integrated-optic technology. A resonant element in the form of a micro-bridge is incorporated in the ridge waveguide and produces a frequency output which is readily digitizeable and immune to laser frequency noise. Finally, monolithic mechanical means for phase modulation are provided on the same sensor substrate. This is done by vibrating the cantilever or micro-bridge either electrically or optically. 29 figs.

  3. Interferometric fiber optic displacement sensor

    DOE Patents [OSTI]

    Farah, J.

    1999-04-06

    A method is presented to produce a change in the optical path length in the gap between two single mode optical fibers proportional to the lateral displacement of either fiber end normal to its axis. This is done with the use of refraction or diffraction at the interface between a guiding and non-guiding media to change the direction of propagation of the light in the gap. A method is also presented for laying a waveguide on a cantilever so that the displacement of the tip of the cantilever produces a proportional path length change in the gap by distancing the waveguide from the neutral axis of the cantilever. The fiber is supported as a cantilever or a waveguide is deposited on a micromachined cantilever and incorporated in an interferometer which is made totally on a silicon substrate with the use of integrated-optic technology. A resonant element in the form of a micro-bridge is incorporated in the ridge waveguide and produces a frequency output which is readily digitizeable and immune to laser frequency noise. Finally, monolithic mechanical means for phase modulation are provided on the same sensor substrate. This is done by vibrating the cantilever or micro-bridge either electrically or optically. 23 figs.

  4. Interferometric fiber optic displacement sensor

    DOE Patents [OSTI]

    Farah, John

    1995-01-01

    A method is presented to produce a change in the optical path length in the gap between two single mode optical fibers proportional to the lateral displacement of either fiber end normal to its axis. This is done with the use of refraction or diffraction at the interface between a guiding and non-guiding media to change the direction of propagation of the light in the gap. A method is also presented for laying a waveguide on a cantilever so that the displacement of the tip of the cantilever produces a proportional path length change in the gap by distancing the waveguide from the neutral axis of the cantilever. The fiber is supported as a cantilever or a waveguide is deposited on a micromachined cantilever and incorporated in an interferometer which is made totally on a silicon substrate with the use of integrated-optic technology. A resonant element in the form of a micro-bridge is incorporated in the ridge waveguide and produces a frequency output which is readily digitizeable and immune to laser frequency noise. Finally, monolithic mechanical means for phase modulation are provided on the same sensor substrate. This is done by vibrating the cantilever or micro-bridge either electrically or optically.

  5. LED Color Characteristics | Department of Energy

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

    Color Characteristics LED Color Characteristics Reviews the fundamentals regarding light and color, summarizing the most important color issues related to white-light LED systems. (6 pages, April 2016) led-color-characteristics-factsheet.pdf (1.77 MB) More Documents & Publications Evaluating Color Rendition Using IES TM-30-15 LED Color Characteristics presentation slides: UNDERSTANDING AND APPLYING TM-30-15

  6. LED Essentials - Technology, Applications, Advantages, Disadvantages |

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

    Department of Energy Information Resources » Webcasts » LED Essentials - Technology, Applications, Advantages, Disadvantages LED Essentials - Technology, Applications, Advantages, Disadvantages On October 11, 2007, Kevin Dowling, VP of Innovation for Philips Solid-State Lighting Solutions, presented a broad introduction to LED technology, and discussed the technology status, advantages and disadvantages, current applications, future potential, and evolving path of LED technology from

  7. Cold fusion, Alchemist's dream

    SciTech Connect (OSTI)

    Clayton, E.D.

    1989-09-01

    In this report the following topics relating to cold fusion are discussed: muon catalysed cold fusion; piezonuclear fusion; sundry explanations pertaining to cold fusion; cosmic ray muon catalysed cold fusion; vibrational mechanisms in excited states of D{sub 2} molecules; barrier penetration probabilities within the hydrogenated metal lattice/piezonuclear fusion; branching ratios of D{sub 2} fusion at low energies; fusion of deuterons into {sup 4}He; secondary D+T fusion within the hydrogenated metal lattice; {sup 3}He to {sup 4}He ratio within the metal lattice; shock induced fusion; and anomalously high isotopic ratios of {sup 3}He/{sup 4}He.

  8. LED Lighting Facts | Department of Energy

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

    Research & Development » Technology Application R&D » LED Lighting Facts LED Lighting Facts LED lighting facts - A Program of the U.S. DOE DOE's LED Lighting Facts® program showcases LED products for general illumination from manufacturers who commit to testing products and reporting performance results according to industry standards. For lighting buyers, designers, and energy efficiency programs, the program provides information essential to evaluating SSL products. Central to the

  9. LED Frequently Asked Questions | Department of Energy

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

    Frequently Asked Questions LED Frequently Asked Questions This document provides answers to LED frequently asked questions for plant-wide improvements, such as "Are LEDs ready for general lighting?" LED Frequently Asked Questions (May 2011) (344.41 KB) More Documents & Publications LED Frequently Asked Questions Lighting Designer Roundtable on Solid-State Lighting SSL R&D Multi-Year Program Plan

  10. LED Lighting Facts | Department of Energy

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

    Research & Development » Technology Application R&D » LED Lighting Facts LED Lighting Facts LED lighting facts - A Program of the U.S. DOE DOE's LED Lighting Facts® program showcases LED products for general illumination from manufacturers who commit to testing products and reporting performance results according to industry standards. For lighting buyers, designers, and energy efficiency programs, the program provides information essential to evaluating SSL products. Central to the

  11. LED Lighting Forecast | Department of Energy

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

    Publications » Market Studies » LED Lighting Forecast LED Lighting Forecast The DOE report Energy Savings Forecast of Solid-State Lighting in General Illumination Applications estimates the energy savings of LED white-light sources over the analysis period of 2013 to 2030. With declining costs and improving performance, LED products have been seeing increased adoption for general illumination applications. This is a positive development in terms of energy consumption, as LEDs use significantly

  12. Variable delivery, fixed displacement pump

    DOE Patents [OSTI]

    Sommars, Mark F.

    2001-01-01

    A variable delivery, fixed displacement pump comprises a plurality of pistons reciprocated within corresponding cylinders in a cylinder block. The pistons are reciprocated by rotation of a fixed angle swash plate connected to the pistons. The pistons and cylinders cooperate to define a plurality of fluid compression chambers each have a delivery outlet. A vent port is provided from each fluid compression chamber to vent fluid therefrom during at least a portion of the reciprocal stroke of the piston. Each piston and cylinder combination cooperates to close the associated vent port during another portion of the reciprocal stroke so that fluid is then pumped through the associated delivery outlet. The delivery rate of the pump is varied by adjusting the axial position of the swash plate relative to the cylinder block, which varies the duration of the piston stroke during which the vent port is closed.

  13. Displaced electrode process for welding

    DOE Patents [OSTI]

    Heichel, L.J.

    1975-08-26

    A method is described for the butt-welding of a relatively heavy mass to a relatively small mass such as a thin-wall tube. In butt-welding heat is normally applied at the joint between the two pieces which are butt-welded together. The application of heat at the joint results in overheating the tube which causes thinning of the tube walls and porosity in the tube material. This is eliminated by displacing the welding electrode away from the seam toward the heavier mass so that heat is applied to the heavy mass and not at the butt seam. Examples of the parameters used in welding fuel rods are given. The cladding and end plugs were made of Zircalloy. The electrode used was of 2 percent thoriated tungsten. (auth)

  14. Cold fusion research

    SciTech Connect (OSTI)

    1989-11-01

    I am pleased to forward to you the Final Report of the Cold Fusion Panel. This report reviews the current status of cold fusion and includes major chapters on Calorimetry and Excess Heat, Fusion Products and Materials Characterization. In addition, the report makes a number of conclusions and recommendations, as requested by the Secretary of Energy.

  15. Hot and cold fusion

    SciTech Connect (OSTI)

    Not Available

    1990-08-01

    This article presents an overview of research in cold fusion research and development in cold fusion at the Tokomak Fusion Test Reactor at the Princeton Plasma Physics Lab, and at the inertial containment facility at Lawrence Livermore National Lab. is described.

  16. Cold atmospheric plasma in cancer therapy

    SciTech Connect (OSTI)

    Keidar, Michael; Shashurin, Alex; Volotskova, Olga; Ann Stepp, Mary; Srinivasan, Priya; Sandler, Anthony; Trink, Barry

    2013-05-15

    Recent progress in atmospheric plasmas has led to the creation of cold plasmas with ion temperature close to room temperature. This paper outlines recent progress in understanding of cold plasma physics as well as application of cold atmospheric plasma (CAP) in cancer therapy. Varieties of novel plasma diagnostic techniques were developed recently in a quest to understand physics of CAP. It was established that the streamer head charge is about 10{sup 8} electrons, the electrical field in the head vicinity is about 10{sup 7} V/m, and the electron density of the streamer column is about 10{sup 19} m{sup ?3}. Both in-vitro and in-vivo studies of CAP action on cancer were performed. It was shown that the cold plasma application selectively eradicates cancer cells in-vitro without damaging normal cells and significantly reduces tumor size in-vivo. Studies indicate that the mechanism of action of cold plasma on cancer cells is related to generation of reactive oxygen species with possible induction of the apoptosis pathway. It is also shown that the cancer cells are more susceptible to the effects of CAP because a greater percentage of cells are in the S phase of the cell cycle.

  17. Cold versus hot fusion deuterium branching ratios

    SciTech Connect (OSTI)

    Fox, H.; Bass, R.

    1995-12-31

    A major source of misunderstanding of the nature of cold nuclear fusion has been the expectation that the deuterium branching ratios occurring within a palladium lattice would be consistent with the gas-plasma branching ratios. This misunderstanding has led to the concept of the dead graduate student, the 1989`s feverish but fruitless search for neutron emissions from cold fusion reactors, and the follow-on condemnation of the new science of cold fusion. The experimental facts are that in a properly loaded palladium lattice, the deuterium fusion produces neutrons at little above background, a greatly less-than-expected production of tritium (the tritium desert), and substantially more helium-4 than is observed in hot plasma physics. The experimental evidence is now compelling (800 reports of success from 30 countries) that cold nuclear fusion is a reality, that the branching ratios are unexpected, and that a new science is struggling to be recognized. Commercialization of some types of cold fusion devices has already begun.

  18. Intersecting Cold Pools: Convective Cloud Organization by Cold...

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

    Intersecting Cold Pools: Convective Cloud Organization by Cold Pools over Tropical Ocean For original submission and image(s), see ARM Research Highlights http:www.arm.gov...

  19. SemiLEDs | Open Energy Information

    Open Energy Info (EERE)

    SemiLEDs Place: Boise, Idaho Zip: 83702 Product: US-based LED chip maker with Asia manufacturing operations. Coordinates: 43.60698, -116.193409 Show Map Loading map......

  20. LEDs for Street Lighting—Here Today

    SciTech Connect (OSTI)

    2013-11-29

    Fact sheet that provides a brief overview of the viability of LED street lighting in municipalities and highlights case studies of two cities—Los Angeles and Seattle—that have invested in LED street lighting.

  1. Decisions that led to Y-12

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

    Decisions that led to Y-12 Last week we saw the political and organizational changes that led up to the Manhattan Project being created on August 13, 1942. The S-1 Executive ...

  2. Final decisions that led to Y-12

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

    decisions that led to Y-12 As we have seen earlier in this series, Ernest O. Lawrence and ... By late 1942, progress on the reactor technology being led by Enrico Fermi at the ...

  3. Updating the LED Life Cycle Assessment

    Energy Savers [EERE]

    Part 2: LED Manufacturing and Performance 7 Goal of the New Study Review new literature on the life- cycle assessment of LED products. Determine if newer A-19 products...

  4. LED R&D | Department of Energy

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

    DOE-funded LED R&D projects tackle the science and technology challenges that stand in the way of achieving SSL Program targets for LED efficacy, performance, and cost. All project ...

  5. LED Solutions for the Dark Hours

    Energy Savers [EERE]

    technologies 5 LEDs for Street and Roadway Lighting Portland, OR Philadelphia, PA New York, NY Kansas City, MO 6 Boston Las Vegas Seattle Number of LED Replacements to Date (4...

  6. Displacing Natural Gas Consumption and Lowering Emissions

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

    ADVANCED MANUFACTURING OFFICE Displacing Natural Gas Consumption and Lowering Emissions By ... full advantage of op- portunity fuels and thereby reduce their natural gas consumption. ...

  7. LED Lighting Basics | Department of Energy

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

    LED Lighting Basics LED Lighting Basics August 16, 2013 - 10:07am Addthis Light-emitting diodes (LEDs) efficiently produce light in a fundamentally different way than any legacy or traditional light source. LEDs are compound semiconductor devices that produce light when an appropriate electrical current is applied. Applying electrical current causes electrons to flow from one material in the structure to another and this in turn causes a series of complex interactions at an atomic level that

  8. LED Lighting in a Performing Arts Center

    SciTech Connect (OSTI)

    Wilkerson, A. M.; Abell, T. C.; T., E. Perrin

    2015-07-31

    GATEWAY demonstration report of LED wall washer retrofit lighting at the University of Maryland Clarice Smith Performing Arts Center.

  9. LED Watch: The Outlook for OLEDs

    Broader source: Energy.gov [DOE]

    December 2014 LED Watch: The Outlook for OLEDs James Brodrick, U.S. Department of Energy LD+A Magazine

  10. LED Lighting: Just the Facts, Please!

    Broader source: Energy.gov [DOE]

    Now there's another arsenal in the toolbox to help consumers find LED lights they can trust: the Lighting Facts™ label.

  11. Have You Used LED Light Strings?

    Broader source: Energy.gov [DOE]

    This week, you read about LED holiday light strings, which can use 90% less energy than regular incandescent light strings.

  12. LED Color Characteristics | Department of Energy

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

    DOE EERE Building Technologies Program Solid-State Lighting fact sheet led-color-characteristics-factsheet.pdf (804.38 KB) More Documents & Publications LED Color Characteristics Evaluating Color Rendition Using IES TM-30-15 Report 23: Photometric Testing of White Tunable LED Luminaires

  13. LED Market Adoption: Status and Trends

    Energy Savers [EERE]

    (lmW) 67 60 CCT (K) 3000 3500 L 70 (hours) 28,000 36,000 Price (unit) 23 30 18 LED Linear Fixtures 19 T12 26% T8 67% T5 7% LED Lamp <1% LED Luminaire <1% 2012 T12 17% T8 72%...

  14. An engine with means for changing the phase angle between displacer and working pistons: Its thermo dynamic cycle compared to the ideal Stirling cycle

    SciTech Connect (OSTI)

    Ayala V., E.

    1984-08-01

    This paper describes a heat engine comprising a displacer piston actuated by the pressure changes accomplished by the working piston combined with the force exerted by the pressure of a spring against the piston which can be changed to modify the phase angle between the displacer and working pistons. A gas cooler is arranged in an independent closed loop circuit that is put into operation between the end of the expansion stroke and the beginning of the compression stroke. The working cylinder is connected to the cold end of the displacer cylinder through an auxiliary cooler and to the end of the displacer cylinder through the heat regenerator and the heater.

  15. Critical speed measurements in the Tevatron cold compressors

    SciTech Connect (OSTI)

    DeGraff, B.; Bossert, R.; Martinez, A.; Soyars, W.M.; /Fermilab

    2006-01-01

    The Fermilab Tevatron cryogenic system utilizes high-speed centrifugal cold compressors, manufactured by Ishikawajima-Harima Heavy Industries Co. Ltd. (IHI), for high energy operations. Nominal operating range for these compressors is 43,000 to 85,000 rpm. Past foil bearing failures prompted investigation to determine if critical speeds for operating compressors fall within operating range. Data acquisition hardware and software settings will be discussed for measuring liftoff, first critical and second critical speeds. Several tests provided comparisons between an optical displacement probe and accelerometer measurements. Vibration data and analysis of the 20 Tevatron ring cold compressors will be presented.

  16. Dual LED/incandescent security fixture

    DOE Patents [OSTI]

    Gauna, Kevin Wayne

    2005-06-21

    A dual LED and incandescent security lighting system uses a hybrid approach to LED illumination. It combines an ambient LED illuminator with a standard incandescent lamp on a motion control sensor. The LED illuminator will activate with the onset of darkness (daylight control) and typically remain on during the course of the night ("always on"). The LED illumination, typically amber, is sufficient to provide low to moderate level lighting coverage to the wall and ground area adjacent to and under the fixture. The incandescent lamp is integrated with a motion control circuit and sensor. When movement in the field of view is detected (after darkness), the incandescent lamp is switched on, providing an increased level of illumination to the area. Instead of an "always on" LED illuminator, the LEDs may also be switched off when the incandescent lamp is switched on.

  17. A Practical Primer to LED Technology | Department of Energy

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

    A Practical Primer to LED Technology A Practical Primer to LED Technology PDF icon A Practical Primer to LED Technology More Documents & Publications LED LUMINAIRE LIFETIME: ...

  18. Strip edge cracking simulation in cold rolling

    SciTech Connect (OSTI)

    Hubert, C.; Dubar, L.; Dubar, M.; Dubois, A.

    2011-01-17

    This research work focuses on a specific defect which occurs during cold rolling of steel strips: edge-serration. Investigations on the industrial processes have led to the conclusion that this defect is the result of the edge-trimming and cold rolling sequences. The aim of this research work is to analyze the effect of the cutting process and the cold rolling on cracks occurrence, especially on strip edges.This study is performed using an experimental testing stand called Upsetting Rolling Test (URT). It allows to reproduce cold rolling contact parameters such as forward slip, reduction ratio and friction coefficients. Specimens sampled near trimmed industrial strip edges are deformed using the URT stand. Two sets of specimens with different stress states, obtained by annealing, are submitted to two reduction passes with extreme forward slips.Scanning electron microscopy observations added to 3D optical surface profiler topographies show that on one hand, forward slip has a major effect on cracks opening. On the other hand, cracks opening decreases according to high roll strip speed gradient. Concerning the heat-treated specimens, no crack appeared after all reduction passes, showing a large influence of the cutting process and consequently of the local stress state in the vicinity of the burnish and fracture regions.

  19. System Reliability for LED-Based Products

    SciTech Connect (OSTI)

    Davis, J Lynn; Mills, Karmann; Lamvik, Michael; Yaga, Robert; Shepherd, Sarah D; Bittle, James; Baldasaro, Nick; Solano, Eric; Bobashev, Georgiy; Johnson, Cortina; Evans, Amy

    2014-04-07

    Results from accelerated life tests (ALT) on mass-produced commercially available 6” downlights are reported along with results from commercial LEDs. The luminaires capture many of the design features found in modern luminaires. In general, a systems perspective is required to understand the reliability of these devices since LED failure is rare. In contrast, components such as drivers, lenses, and reflector are more likely to impact luminaire reliability than LEDs.

  20. LED PAR38 Lamps | Department of Energy

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

    Research & Development » Technology Application R&D » CALiPER Testing » Application Reports » LED PAR38 Lamps LED PAR38 Lamps The following CALiPER reports provide a detailed investigation of LED PAR38 lamp performance, covering basic performance characteristics as well as subjective evaluation of beam, shadow, and color quality. Further analysis is provided on flicker, dimming, and power quality characteristics; stress testing; lumen and chromaticity maintenance; and chromaticity

  1. LEDS Events Calendar | Open Energy Information

    Open Energy Info (EERE)

    Page Edit History LEDS Events Calendar (Redirected from CLEAN Calendar) Jump to: navigation, search Home | About | Inventory | Partnerships | Capacity Building | Webinars | Reports...

  2. LEDS Events Calendar | Open Energy Information

    Open Energy Info (EERE)

    Get Involved Help Apps Datasets Community Login | Sign Up Search Page Edit History LEDS Events Calendar Jump to: navigation, search Home | About | Inventory | Partnerships |...

  3. Category:LEDS Toolkit | Open Energy Information

    Open Energy Info (EERE)

    meant to support the creation and implementation of a Low Emission Development Strategy. Pages in category "LEDS Toolkit" The following 14 pages are in this category, out of...

  4. Using LEDs to Their Best Advantage

    SciTech Connect (OSTI)

    none,

    2012-01-01

    Solid-state lighting program technology fact sheet that explores the unique attributes of LEDs, which may make them the right choice for some applications.

  5. Demonstration Assessment of LED Parking Structure Lighting

    SciTech Connect (OSTI)

    Kinzey, B. R.; Myer, M. A.

    2013-03-01

    GATEWAY program report on a demonstration of LED parking structure lighting at the U.S. Dept. of Labor headquarters in Washington, DC.

  6. LED Lighting Facts Snapshot: Indoor Ambient Lighting

    SciTech Connect (OSTI)

    2013-04-01

    LED Lighting Facts Snapshot reports reveal how today's products really perform, drawing on analysis of verified performance data from the program's online product list.

  7. Municipal Consortium LED Street Lighting Workshop Presentations...

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

    Workshop Agenda DOE Municipal Solid-State Street Lighting Consortium James Brodrick, U.S. Department of Energy Boston's LED Street Lighting Initiative Joanne Massaro, Glenn Cooper, ...

  8. Commercial Lighting and LED Lighting Incentives | Department...

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

    Schools Institutional Savings Category Lighting Lighting ControlsSensors Other EE LED Lighting Maximum Rebate Up to 100% of cost; incentives that exceed 5,000 should be...

  9. LED Directional Lamps | Department of Energy

    Energy Savers [EERE]

    Directional Lamps LED Directional Lamps BTP EERE Solid-State Lighting Program PDF icon leddirectionallamps.pdf More Documents & Publications Energy Savings Estimates of Light ...

  10. LED Replacements for Linear Fluorescent Lamps Webcast

    Broader source: Energy.gov [DOE]

    In this June 20, 2011 webcast on LED products marketed as replacements for linear fluorescent lamps, Jason Tuenge of the Pacific Northwest National Laboratory (PNNL) discussed current Lighting...

  11. Municipal Consortium LED Street Lighting Workshop Presentations...

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

    City of Los Angeles Bureau of Street Lighting San Jose's "Smart" LED Streetlights: Controlled Amy Olay, City of San Jose Adaptive Lighting Controls Panel David Bueno, ...

  12. Dimming LEDs: What You Need to Know

    Broader source: Energy.gov [DOE]

    This December 10, 2012 webcast presented information on the challenges and opportunities facing users trying to dim LED light sources today, reviewing the major types of deployed dimming...

  13. A Practical Primer to LED Technology

    Energy Savers [EERE]

    ssl.energy.gov 2011 LED Transformations, LLC 60 Acknowledgements Support for the development and presentation of this educational seminar was provided by the US Department of...

  14. Municipal Consortium LED Street Lighting Workshop Presentations...

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

    Workshop Agenda ONCOR LED Streetlight Pilot & Technical Evaluation Update Michael Navarro, ONCOR Reading, Understanding, and Applying the LM-80 Standard Chad Stalker, Philips ...

  15. Successful Selection of LED Streetlight Luminaires: Optimizing...

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

    This March 6, 2013 webcast reviewed the factors involved in successful selection of LED streetlight luminaires. Presenters Eric Haugaard of Cree Lighting and Chad Stalker of ...

  16. Solid State Lighting LED Manufacturing Roundtable Summary

    SciTech Connect (OSTI)

    none,

    2010-03-31

    Summary of a meeting of LED experts to develop proposed priority tasks for the Manufacturing R&D initiative, including task descriptions, discussion points, recommendations, and presentation highlights.

  17. Some considerations of the design of displacers for Ringbom Stirling engines

    SciTech Connect (OSTI)

    Fauvel, O.R.; Kentfield, J.A.C.; Walker, G.

    1984-08-01

    The Ringbom Stirling engine is a hybrid of the kinematic Stirling engine having shaft output power and variable speed and of the free piston engine in which the components are driven by changes in working space pressure. Experiments with Ringbom Stirling engines have led to the suspicion that the 'weak link' of the engine is the free displacer. This paper examines some of the factors which must be addressed in the design of displacers for these engines with reference to the thermal, pressure, and dynamical considerations.

  18. Cold Weather Hazards

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

    0 Cold Weather Hazards June 2010 NSA_cwh_Rev10.doc 1 Atmospheric Radiation Measurement Climate Research Facility/ North Slope of Alaska/Adjacent Arctic Ocean (ACRF/NSA/AAO) Cold Weather Hazards Winter Conditions at the North Slope of Alaska The North Slope of Alaska is north of the Arctic Circle at latitudes ranging from 69 to 72 degrees. Barrow, the largest town on the North Slope (pop. 4500), is the site of a National Weather Service Station, which has been active for several decades, so the

  19. Solving the 'Green Gap' in LED Technology

    Broader source: Energy.gov [DOE]

    One long-standing high-priority research area for DOE is to increase the efficiency of deep green LEDs. Although most products today use phosphor conversion (PC) to produce white light from a blue LED, having a good green source could lead to color-mixed white sources that would avoid the losses associated with the PC approach.

  20. Financing Guidance for LED Street Lighting Programs

    Broader source: Energy.gov [DOE]

    Financing an LED street lighting replacement program can present a hurdle for many system owners, even if the planned transition offers very favorable economics. Replacing the existing system requires a significant budget, particularly as the scope of the program increases. Cities such as Los Angeles and Seattle have invested many millions of dollars into their (very successful) LED street lighting replacement programs.

  1. Today LED Holiday Lights, Tomorrow the World?

    SciTech Connect (OSTI)

    Gordon, Kelly L.

    2004-12-20

    This article for The APEM Advantage, the quarterly newsletter of the Association of Professional Energy Managers (APEM) describes the recent increase in the popularity of light emitting diode (LED) lighting and compares LED light output with that of incandescent and compact fluorescent lighting.

  2. 100 LPW 800 Lm Warm White LED

    SciTech Connect (OSTI)

    Sun, Decai

    2010-10-31

    An illumination grade warm white (WW) LED, having correlated color temperature (CCT) between 2800 K and 3500K and capable of producing 800 lm output at 100 lm/W, has been developed in this program. The high power WW LED is an ideal source for use as replacement for incandescent, and Halogen reflector and general purpose lamps of similar lumen value. Over the two year period, we have made following accomplishments: developed a high power warm white LED product and made over 50% improvements in light output and efficacy. The new high power WW LED product is a die on ceramic surface mountable LED package. It has four 1x1 mm{sup 2} InGaN pump dice flip chip attached to a ceramic submount in 2x2 array, covered by warm white phosphor ceramic platelets called Lumiramica and an overmolded silicone lens encapsulating the LED array. The performance goal was achieved through breakthroughs in following key areas: (1) High efficiency pump LED development through pump LED active region design and epi growth quality improvement (funded by internal programs). (2) Increase in injection efficiency (IE) represented by reduction in forward voltage (V{sub f}) through the improvement of the silver-based p-contact and a reduction in spreading resistance. The injection efficiency was increased from 80% at the start of the program to 96% at the end of the program at 700 mA/mm{sup 2}. (3) Improvement in thermal design as represented by reduction in thermal resistance from junction to case, through improvement of the die to submount connection in the thin film flip chip (TFFC) LED and choosing the submount material of high thermal conductivity. A thermal resistance of 1.72 K/W was demonstrated for the high power LED package. (4) Improvement in extraction efficiency from the LED package through improvement of InGaN die level and package level optical extraction efficiency improvement. (5) Improvement in phosphor system efficiency by improving the lumen equivalent (LE) and phosphor package

  3. High Performance Green LEDs by Homoepitaxial

    SciTech Connect (OSTI)

    Wetzel, Christian; Schubert, E Fred

    2009-11-22

    This work's objective was the development of processes to double or triple the light output power from green and deep green (525 - 555 nm) AlGaInN light emitting diode (LED) dies within 3 years in reference to the Lumileds Luxeon II. The project paid particular effort to all aspects of the internal generation efficiency of light. LEDs in this spectral region show the highest potential for significant performance boosts and enable the realization of phosphor-free white LEDs comprised by red-green-blue LED modules. Such modules will perform at and outperform the efficacy target projections for white-light LED systems in the Department of Energy's accelerated roadmap of the SSL initiative.

  4. A critical review of displacement ventilation

    SciTech Connect (OSTI)

    Yuan, X.; Chen, Q.; Glicksman, L.R.

    1998-10-01

    This paper reviews several aspects of the performance of displacement ventilation: temperature distribution, flow distribution, contaminant distribution, comfort, energy and cost analysis, and design guidelines. Ventilation rate, cooling load, heat source, wall characteristics, space height, and diffuser type have major impacts on the performance of displacement ventilation. Some of the impacts can be estimated by simple equations, but many are still unknown. Based on current findings, displacement ventilation systems without cooled ceiling panels can be used for space with a cooling load up to 13 Btu/(h{center_dot}ft{sup 2}) (40 W/m{sup 2}). Energy consumed by HVAC systems depends on control strategies. The first costs of the displacement ventilation system are similar to those of a mixing ventilation system. The displacement system with cooled ceiling panels can remove a higher cooling load, but the first costs are higher as well. The design guidelines of displacement ventilation developed in Scandinavian countries need to be clarified and extended so that they can be used for US buildings. This paper outlines the research needed to develop design guidelines for US buildings.

  5. Cold spray nozzle design

    DOE Patents [OSTI]

    Haynes, Jeffrey D.; Sanders, Stuart A.

    2009-06-09

    A nozzle for use in a cold spray technique is described. The nozzle has a passageway for spraying a powder material, the passageway having a converging section and a diverging section, and at least the diverging section being formed from polybenzimidazole. In one embodiment of the nozzle, the converging section is also formed from polybenzimidazole.

  6. Cold fusion coatings

    SciTech Connect (OSTI)

    Wachtler, W.R.

    1993-12-31

    Historically, fusion of metals was accomplished through the use of heat. Cold fusion has become a reality with metal to metal fusion occurring at room temperature. The basics of this new technology which can be done in tank, brush or solid form is covered in this paper.

  7. High Power UV LED Industrial Curing Systems

    SciTech Connect (OSTI)

    Karlicek, Robert, F., Jr; Sargent, Robert

    2012-05-14

    UV curing is a green technology that is largely underutilized because UV radiation sources like Hg Lamps are unreliable and difficult to use. High Power UV LEDs are now efficient enough to replace Hg Lamps, and offer significantly improved performance relative to Hg Lamps. In this study, a modular, scalable high power UV LED curing system was designed and tested, performing well in industrial coating evaluations. In order to achieve mechanical form factors similar to commercial Hg Lamp systems, a new patent pending design was employed enabling high irradiance at long working distances. While high power UV LEDs are currently only available at longer UVA wavelengths, rapid progress on UVC LEDs and the development of new formulations designed specifically for use with UV LED sources will converge to drive more rapid adoption of UV curing technology. An assessment of the environmental impact of replacing Hg Lamp systems with UV LED systems was performed. Since UV curing is used in only a small portion of the industrial printing, painting and coating markets, the ease of use of UV LED systems should increase the use of UV curing technology. Even a small penetration of the significant number of industrial applications still using oven curing and drying will lead to significant reductions in energy consumption and reductions in the emission of green house gases and solvent emissions.

  8. Save Money with LED Holiday Light Strings

    Broader source: Energy.gov [DOE]

    LED (or light emitting diode) light strings can use 90% less energy than regular incandescent light strings. They also last about ten times longer, are cooler than incandescents (reducing fire hazards), and are more durable.

  9. SunLed Technologies | Open Energy Information

    Open Energy Info (EERE)

    Product: Hyderabad-based end-to-end energy efficient lighting solution provider and ESCO focused on LEDs and solar power. Coordinates: 17.6726, 77.5971 Show Map Loading...

  10. LEDs Ready for Takeoff at Louisiana Airport

    Broader source: Energy.gov [DOE]

    About 250 lights along the busy taxiway at Hammond Northshore Regional Airport are being replaced with light-emitting diodes (LEDs) with funds from an Energy Efficiency and Conservation Block Grant (EECBG) from the U.S. Department of Energy.

  11. LEDS Toolkit and Framework | Open Energy Information

    Open Energy Info (EERE)

    User Interface: Website, Desktop Application Website: en.openei.orgappsLEDS Cost: Free UN Region: Central Asia, Eastern Asia, South-Eastern Asia, "Pacific" is not in the list...

  12. Text-Alternative Version LED Lighting Forecast

    Office of Energy Efficiency and Renewable Energy (EERE)

    The DOE report Energy Savings Forecast of Solid-State Lighting in General Illumination Applications estimates the energy savings of LED white-light sources over the analysis period of 2013 to 2030....

  13. LED Outdoor Area Lighting Fact Sheet

    SciTech Connect (OSTI)

    2008-06-01

    This fact sheet reviews the major design and specification concerns for outdoor area lighting, and discusses the potential for LED luminaires to save energy while providing high quality lighting for outdoor areas.

  14. LED Roadway Lighting | Department of Energy

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

    Roadway Lighting LED Roadway Lighting PDF icon I-35 Bridge Report, Phase II PDF icon I-35 Bridge Report, Phase II Brief PDF icon I-35 Bridge Report, Phase I More Documents & ...

  15. LED Holiday Lights: Festive, Safe, and Efficient!

    Broader source: Energy.gov [DOE]

    Ed. Note cross posted from the Energy Savers Blog. LED light strings may cost a little more up front, but they'll save money in the long run and probably last longer too.

  16. DOE Hosts LED Industry Standards Workshop

    Broader source: Energy.gov [DOE]

    The U.S. Department of Energy hosted an LED Industry Standards Workshop on March 1, 2006 in Washington, D.C. The Workshop provided a forum to encourage greater cooperation and coordination among...

  17. Testimonials - Partnerships in LED Lighting - Philips Lumileds

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

    Lighting, LLC | Department of Energy LED Lighting - Philips Lumileds Lighting, LLC Testimonials - Partnerships in LED Lighting - Philips Lumileds Lighting, LLC Addthis Text Version The words "Office of Energy Efficiency & Renewable Energy, U.S. Department of Energy, EERE Partnership Testimonials," appear on the screen, followed by "Sunil Thomas, General Manager of San Jose Manufacturing Site, Philips Lumileds Lighting, LLC" and footage of a man sitting in a showcase

  18. Text-Alternative Version: Evaluating LED Street Lighting Solutions...

    Energy Savers [EERE]

    Evaluating LED Street Lighting Solutions Text-Alternative Version: Evaluating LED Street Lighting Solutions Below is the text-alternative version of the Evaluating LED Street ...

  19. Report 23: Photometric Testing of White Tunable LED Luminaires...

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

    Report 23: Photometric Testing of White Tunable LED Luminaires Report 23: Photometric Testing of White Tunable LED Luminaires PDF icon caliper23white-tunable-led-luminaires.pdf ...

  20. SPECIFYING LED COLOR-TUNABLE PRODUCTS | Department of Energy

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

    SPECIFYING LED COLOR-TUNABLE PRODUCTS SPECIFYING LED COLOR-TUNABLE PRODUCTS Specifying LED color-tunable luminaires is dependent on being able to make accurate comparisons between ...

  1. UNDERSTANDING LED COLOR-TUNABLE PRODUCTS | Department of Energy

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

    UNDERSTANDING LED COLOR-TUNABLE PRODUCTS UNDERSTANDING LED COLOR-TUNABLE PRODUCTS LED luminaires with the ability to deliver varying light color have been on the architectural ...

  2. LED Product Development and Manufacturing R&D Roundtable Summary...

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

    LED Product Development and Manufacturing R&D Roundtable Summary LED Product Development and Manufacturing R&D Roundtable Summary PDF icon LED Product Dev and Mfg Roundtable ...

  3. Report 23: Photometric Testing of White Tunable LED Luminaires...

    Energy Savers [EERE]

    3: Photometric Testing of White Tunable LED Luminaires Report 23: Photometric Testing of White Tunable LED Luminaires PDF icon caliper23white-tunable-led-luminaires.pdf More ...

  4. Getting Ready for LEDs: LED Lighting Video Series Explains the Basics |

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

    Department of Energy Getting Ready for LEDs: LED Lighting Video Series Explains the Basics Getting Ready for LEDs: LED Lighting Video Series Explains the Basics November 26, 2012 - 3:09pm Addthis Part 1 of the ElectricTV.net video series. Part 2 of the ElectricTV.net video series. Roland Risser Roland Risser Deputy Assistant Secretary for Renewable Power (Acting) How can I participate? Learn more about the advantages and accessiblity of LED lighting from this series of videos. If you haven't

  5. Radial cold trap

    DOE Patents [OSTI]

    Grundy, Brian R.

    1981-01-01

    The radial cold trap comprises a housing having a plurality of mesh bands disposed therein. The mesh bands comprise concentrically arranged bands of mesh with the mesh specific surface area of each band increasing from the outermost mesh band to the innermost mesh band. An inlet nozzle is attached to the outside section of the housing while an outlet nozzle is attached to the inner portion of the housing so as to be concentrically connected to the innermost mesh band. An inlet baffle having orifices therein may be disposed around the outermost mesh band and within the housing for directing the flow of the fluid from the inlet nozzle to the outermost mesh band in a uniform manner. The flow of fluid passes through each consecutive mesh band and into the outlet nozzle. The circular pattern of the symmetrically arranged mesh packing allows for better utilization of the entire cold trap volume.

  6. Radial cold trap

    DOE Patents [OSTI]

    Grundy, B.R.

    1981-09-29

    The radial cold trap comprises a housing having a plurality of mesh bands disposed therein. The mesh bands comprise concentrically arranged bands of mesh with the mesh specific surface area of each band increasing from the outermost mesh band to the innermost mesh band. An inlet nozzle is attached to the outside section of the housing while an outlet nozzle is attached to the inner portion of the housing so as to be concentrically connected to the innermost mesh band. An inlet baffle having orifices therein may be disposed around the outermost mesh band and within the housing for directing the flow of the fluid from the inlet nozzle to the outermost mesh band in a uniform manner. The flow of fluid passes through each consecutive mesh band and into the outlet nozzle. The circular pattern of the symmetrically arranged mesh packing allows for better utilization of the entire cold trap volume. 2 figs.

  7. LEDS GP Success Story: Fostering Coordinated LEDS Support in Kenya (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2014-03-01

    The LEDS Global Partnership (LEDS GP) strives to advance climate-resilient, low-emission development through catalyzing collaboration, information exchange, and action on the ground. The Government of Kenya is a key LEDS GP member and offers an inspiring example of how LEDS GP is having an impact globally. The 2012 LEDS Collaboration in Action workshop in London provided an interactive space for members to share experiences on cross-ministerial LEDS leadership and to learn about concrete development impacts of LEDS around the world. Inspired by these stories, the Kenya's Ministry of State for Planning, National Development and Vision 2030 (MPND) began to collaborate closely with the Ministry of Environment and Mineral Resources to create strong links between climate change action and development in the country, culminating in the integration of Kenya's National Climate Change Action Plan and the country's Medium Term Development Plan.

  8. Cold nuclear fusion

    SciTech Connect (OSTI)

    Tsyganov, E. N.

    2012-02-15

    Recent accelerator experiments on fusion of various elements have clearly demonstrated that the effective cross-sections of these reactions depend on what material the target particle is placed in. In these experiments, there was a significant increase in the probability of interaction when target nuclei are imbedded in a conducting crystal or are a part of it. These experiments open a new perspective on the problem of so-called cold nuclear fusion.

  9. Note: High density pulsed molecular beam for cold ion chemistry

    SciTech Connect (OSTI)

    Kokish, M. G.; Rajagopal, V.; Marler, J. P.; Odom, B. C.

    2014-08-15

    A recent expansion of cold and ultracold molecule applications has led to renewed focus on molecular species preparation under ultrahigh vacuum conditions. Meanwhile, molecular beams have been used to study gas phase chemical reactions for decades. In this paper, we describe an apparatus that uses pulsed molecular beam technology to achieve high local gas densities, leading to faster reaction rates with cold trapped ions. We characterize the beam's spatial profile using the trapped ions themselves. This apparatus could be used for preparation of molecular species by reactions requiring excitation of trapped ion precursors to states with short lifetimes or for obtaining a high reaction rate with minimal increase of background chamber pressure.

  10. It's 2015: Should All Your Sockets be Filled with LEDs?

    Energy Savers [EERE]

    - mid-power LEDs on PCb used in 2x4 troffers 4 LED Modules and Light Engines GE Infusion Philips Fortimo Osram PrevaLED 5 LEDs: A New Light Source for Everything * Outdoor...

  11. Pittsburgh LED Street Lighting Research Project Performance Criteria

    Broader source: Energy.gov [DOE]

    A Pittsburgh LED Street Lighting Research Project document on Technical and Aesthetic Performance for Business District LED Lighting.

  12. Memorandum of Decision: Withdrawal of LED Lighting Waiver | Department...

    Office of Environmental Management (EM)

    LED Lighting Waiver Memorandum of Decision: Withdrawal of LED Lighting Waiver novemberdecisionwithdraw More Documents & Publications Nationwide Nonavailability Waiver: November...

  13. LED Color-Tunable Products | Department of Energy

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

    Research & Development » Technology Application R&D » CALiPER Testing » Application Reports » LED Color-Tunable Products LED Color-Tunable Products UNDERSTANDING, LED Color-Tunable Products SPECIFYING, LED Color-Tunable Products CONTROLLING, LED Color-Tunable Products TESTING, LED Color-Tunable Products Color-tunable LED luminaires are a nascent and growing product category. Beyond the inherent energy efficiency of LEDs, these luminaires offer other potential benefits including

  14. Peregrinations on cold fusion

    SciTech Connect (OSTI)

    Turner, L.

    1989-01-01

    Attention is focused on the possibility of resonance-enhanced deuteron Coulomb barrier penetration. Because of the many-body nature of the interactions of room-temperature deuterons diffusing through a lattice possessing deuterons in many of the interstitial positions, the diffusing deuterons can resonate on the atomic scale in the potential wells bounded by the ascending walls of adjacent Coulomb barriers and thereby penetrate the Coulomb barriers in a fashion vastly underestimated by two-body calculations in which wells for possible resonance are absent. Indeed, perhaps the lack of robust reproducibility in cold fusion originates from the narrowness of such transmission resonances. 4 refs., 1 fig.

  15. LED Lighting in a Performing Arts Building

    SciTech Connect (OSTI)

    Miller, N. J.; Kaye, S. M.; Coleman, P. M.; Wilkerson, A. M.; Perrin, T. E.; Sullivan, G. P.

    2014-07-31

    At the University of Florida in Gainesville, the DOE Solid-State Lighting GATEWAY program evaluated LED architectural and theatrical lighting in four academic/performance-related spaces within the Nadine McGuire Theatre + Dance Pavilion. Due to a wise choice of products and luminaire light distributions, the change brought significant quality improvements including improved controllability and color.

  16. LED structure with enhanced mirror reflectivity

    DOE Patents [OSTI]

    Bergmann, Michael; Donofrio, Matthew; Heikman, Sten; Schneider, Kevin S; Haberern, Kevin W; Edmond, John A

    2014-04-01

    Embodiments of the present invention are generally related to LED chips having improved overall emission by reducing the light-absorbing effects of barrier layers adjacent mirror contacts. In one embodiment, a LED chip comprises one or more LEDs, with each LED having an active region, a first contact under the active region having a highly reflective mirror, and a barrier layer adjacent the mirror. The barrier layer is smaller than the mirror such that it does not extend beyond the periphery of the mirror. In another possible embodiment, an insulator is further provided, with the insulator adjacent the barrier layer and adjacent portions of the mirror not contacted by the active region or by the barrier layer. In yet another embodiment, a second contact is provided on the active region. In a further embodiment, the barrier layer is smaller than the mirror such that the periphery of the mirror is at least 40% free of the barrier layer, and the second contact is below the first contact and accessible from the bottom of the chip.

  17. Low-Cost Illumination-Grade LEDs

    SciTech Connect (OSTI)

    Epler, John

    2013-08-31

    Solid State Lighting is a cost-effective, energy-conserving technology serving a rapidly expand- ing multi-billion dollar market. This program was designed to accelerate this lighting revolution by reducing the manufacturing cost of Illumination-Grade LEDs. The technical strategy was to investigate growth substrate alternatives to standard planar sapphire, select the most effective and compatible option, and demonstrate a significant increase in Lumen/$ with a marketable LED. The most obvious alternate substrate, silicon, was extensively studied in the first two years of the program. The superior thermal and mechanical properties of Si were expected to improve wavelength uniformity and hence color yield in the manufacture of high-power illumination- grade LEDs. However, improvements in efficiency and epitaxy uniformity on standard c-plane sapphire diminished the advantages of switching to Si. Furthermore, the cost of sapphire decreased significantly and the cost of processing Si devices using our thin film process was higher than expected. We concluded that GaN on Si was a viable technology but not a practical option for Philips Lumileds. Therefore in 2012 and 2013, we sought and received amendments which broadened the scope to include other substrates and extended the time of execution. Proprietary engineered substrates, off-axis (non-c-plane) sapphire, and c-plane patterned sapphire substrates (PSS) were all investigated in the final 18 months of this program. Excellent epitaxy quality was achieved on all three candidates; however we eliminated engineered substrates and non-c-plane sapphire because of their higher combined cost of substrate, device fabrication and packaging. Ultimately, by fabricating a flip-chip (FC) LED based upon c-plane PSS we attained a 42% reduction in LED manufacturing cost relative to our LUXEON Rebel product (Q1-2012). Combined with a flux gain from 85 to 102 Lm, the LUXEON Q delivered a 210% increase in Lm/$ over this time period. The

  18. Sustainable LED Fluorescent Light Replacement Technology

    SciTech Connect (OSTI)

    2011-06-30

    Ilumisys and the National Center for Manufacturing Sciences (NCMS) partnered on a three-year project awarded by the United States (U.S.) Department of Energy (DOE), to quantify the impacts of LED lamps, incandescent lamps and fluorescent benchmark lamps over a product lifecycle – i.e. to develop a sustainable design and manufacturing strategy that addresses product manufacturing, use, recycling and disposal scenarios for LED-based lighting. Based on the knowledge gained from extensive product tear-down studies of fluorescent and screw-in lighting products, lifecycle assessment tools, and accelerated lifecycle testing protocols, an interactive Sustainable LED Design Guide has been developed to aid architectural and lighting designers and engineers in making design decisions that consider three important environmental impacts (greenhouse gas emissions, energy use and mercury emission) across all phases of the life of an LED lighting product. Critical information developed for the lifecycle analysis and product feature comparisons is the useful life of the lighting product as well as its performance. The Design Guide is available at www.ncms.org, and was developed based on operational and durability testing of a variety of lighting products including power consumption, light output, and useful life of a lamp in order to allow a more realistic comparison of lamp designs. This report describes the main project tasks, results and innovative features of the lifecycle assessment (LCA)-based design tools, and the key considerations driving the sustainable design of LED lighting systems. The Design Guide incorporates the following three novel features for efficiently evaluating LED lighting features in value-chains: • Bill-of-Materials (BOM) Builder – Designers may import process data for each component and supply functional data for the product, including power, consumption, lumen output and expected useful life. • Environmental Impact Review – Designs are

  19. Cold isopressing method

    DOE Patents [OSTI]

    Chen, Jack C.; Stawisuck, Valerie M.; Prasad, Ravi

    2003-01-01

    A cold isopressing method in which two or more layers of material are formed within an isopressing mold. One of the layers consists of a tape-cast film. The layers are isopressed within the isopressing mold, thereby to laminate the layers and to compact the tape-cast film. The isopressing mold can be of cylindrical configuration with the layers being coaxial cylindrical layers. The materials used in forming the layers can contain green ceramic materials and the resultant structure can be fired and sintered as necessary and in accordance with known methods to produce a finished composite, ceramic structure. Further, such green ceramic materials can be of the type that are capable of conducting hydrogen or oxygen ions at high temperature with the object of utilizing the finished composite ceramic structure as a ceramic membrane element.

  20. Challenges in LED Research and Development | Department of Energy

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

    LED Research and Development Challenges in LED Research and Development View the video about LED lighting technology, where it is headed, and the DOE's role in its continued R&D

  1. LED R&D Challenges | Department of Energy

    Energy Savers [EERE]

    Understanding SSL » LED Basics LED Basics Unlike incandescent lamps, LEDs are not inherently white light sources. Instead, LEDs emit nearly monochromatic light, making them highly efficient for colored light applications such as traffic lights and exit signs. However, to be used as a general light source, white light is needed. White light can be achieved with LEDs in three ways: Phosphor conversion, in which a phosphor is used on or near the LED to convert the colored light to white light RGB

  2. A Statistical Method Analyzing LED Lumen Depreciation and Projecting LED Life

    SciTech Connect (OSTI)

    Qiao, Hong; Pulsipher, Trenton C.; Hathaway, John E.; Richman, Eric E.; Radkov, Emil

    2010-05-30

    There is a strong need for a method to represent the potential life of LED products as a critical part of design decisions including cost-effectiveness analysis. The IES LM-80 test method is in place to collect lumen depreciation data but it does not provide for estimation of future long term depreciation. Separate estimation methods are being considered (TM-21) and this paper describes the analysis of a series of LED degradation models and subsequent development of an estimation method. The work involves analysis of a set of engineering models to determine their applicability and define a structure for their use in LED lumen output life based on a lumen output level such as the L70 metric. The analysis has provided valuable information on methods effectively estimating LED life time, and impacts of measurement uncertainties, test duration, interval and other test conditions on selecting degradation models and LED life time projection. A set of guidelines are recommended to estimate LED life from data obtained using the current LM-80 test method.

  3. Which LED Lighting Products Would You Consider Trying?

    Broader source: Energy.gov [DOE]

    Which LED lighting products would you consider trying? Or, if you're already using LEDs, what do you think of them?

  4. CONTROLLING LED COLOR-TUNABLE PRODUCTS | Department of Energy

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

    CONTROLLING LED COLOR-TUNABLE PRODUCTS CONTROLLING LED COLOR-TUNABLE PRODUCTS photo of a conference room. Controlling color-tunable luminaires can be challenging for specifiers,...

  5. LEDS Collaboration in Action Workshop Attendee List | Open Energy...

    Open Energy Info (EERE)

    LEDS Collaboration in Action Workshop Attendee List (Redirected from LEDS Collaboration in Action Workshop Participating Countries) Jump to: navigation, search Low Emission...

  6. Text-Alternative Version: MSSLC Member Case Studies - LED Street...

    Energy Savers [EERE]

    MSSLC Member Case Studies - LED Street Lighting Programs Webinar Text-Alternative Version: MSSLC Member Case Studies - LED Street Lighting Programs Webinar Below is the ...

  7. Guanquan Shandong Photoelectric Technology aka United LED Corporation...

    Open Energy Info (EERE)

    Guanquan Shandong Photoelectric Technology aka United LED Corporation Jump to: navigation, search Name: Guanquan (Shandong) Photoelectric Technology (aka United LED Corporation)...

  8. Text-Alternative Version: Dimming LEDs Webcast | Department of...

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

    Well as many people know LED dimming delivers many other value propositions to LED ... and this is particularly relevant for people who are experienced dimming light sources ...

  9. LEDs Go Ivy League: Princeton's Dillon Gymnasium | Department...

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

    View the video about LED lighting in Dillon Gymnasium, a focal point of sports and recreation at Princeton since 1947. William Evans discusses measurable benefits of LED lighting ...

  10. Solid State Lighting LED Core Technology R&D Roundtable

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

    The document should be referenced as: DOE SSL Program, "Solid State Lighting LED Core Technology R&D Roundtable," November 2015. Authors Monica Hansen LED Lighting Advisors Nnamnor ...

  11. Demonstration of LED Street Lighting in Kansas City, MO Kinzey...

    Office of Scientific and Technical Information (OSTI)

    Street Lighting in Kansas City, MO Kinzey, Bruce R.; Royer, Michael P.; Hadjian, M.; Kauffman, Rick LED streetlighting; field illuminance measurement LED streetlighting; field...

  12. Demonstration Assessment of Light Emitting Diode (LED) Street...

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

    This report summarizes an LED street lighting assessment project conducted to study the applicability of LED luminaires in a street lighting application. emergingtechreportleds...

  13. Demonstration Assessment of Light-Emitting Diode (LED) Freezer...

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

    Demonstration Assessment of Light-Emitting Diode (LED) Freezer Case Lighting Demonstration Assessment of Light-Emitting Diode (LED) Freezer Case Lighting This document is a report ...

  14. White LED with High Package Extraction Efficiency (Technical...

    Office of Scientific and Technical Information (OSTI)

    Technical Report: White LED with High Package Extraction Efficiency Citation Details In-Document Search Title: White LED with High Package Extraction Efficiency The goal of this ...

  15. Demonstration of LED Street Lighting in Kansas City, MO (Technical...

    Office of Scientific and Technical Information (OSTI)

    Technical Report: Demonstration of LED Street Lighting in Kansas City, MO Citation Details In-Document Search Title: Demonstration of LED Street Lighting in Kansas City, MO Nine ...

  16. Exterior LED Lighting Projects at Princeton University | Department...

    Energy Savers [EERE]

    Exterior LED Lighting Projects at Princeton University Exterior LED Lighting Projects at Princeton University 2015gatewayprinceton-exterior.pdf gatewayprinceton-exteriorbrief.p...

  17. Technical Feasibility Assessment of LED Roadway Lighting on the...

    Office of Scientific and Technical Information (OSTI)

    Technical Feasibility Assessment of LED Roadway Lighting on the Golden Gate Bridge Tuenge, Jason R. LED; induction; ceramic metal halide; plasma; roadway lighting; Golden Gate...

  18. (Expired) Nationwide Limited Public Interest Waiver for LED Lighting...

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

    (Expired) Nationwide Limited Public Interest Waiver for LED Lighting and HVAC Units: February 11, 2010 (Expired) Nationwide Limited Public Interest Waiver for LED Lighting and HVAC ...

  19. LED Efficacy: What America Stands to Gain | Department of Energy

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

    Efficacy: What America Stands to Gain LED Efficacy: What America Stands to Gain LED Efficacy-What America Stands to Gain_ November 2015.pdf (280.37 KB)

  20. Visualization and simulation of immiscible displacement in fractured systems using micromodels: Steam injection

    SciTech Connect (OSTI)

    Yortsos, Y.C.

    1995-07-01

    A study of steam and hot water injection processes in micromodel geometries that mimic a matrix-fracture system was undertaken. The followings were observed: Light components existing in the crude oil generated a very high efficient gas-drive at elevated temperatures. This gas generation in conjunction with natural surfactant existing in the crude oil, lead to the formation of a foam in the fracture and to improved displacement in the matrix. We observed that the steam enters the fracture and the matrix depending on whether the steam rate exceeds or not the critical values. The resulting condensed water also moves preferentially into the matrix or the fracture depending on the corresponding capillary number. Since steam is a non-wetting phase as a vapor, but becomes a wetting phase when condensed in a water-wet system, steam injection involves both drainage and imbibition. It was found that all of the oil trapped by the condensed water can be mobilized and recovered when in contact with steam. We also examined hot-water displacement. In comparison with cold-water experiments at the same capillary number, a higher sweep efficiency for both light and heavy oils was observed. It was found that the loam generated in the fracture during hot-water injection, is more stable than in steamflooding. Nonetheless, hot-water injection resulted into less efficient displacement in its absence.

  1. Transient digitizer with displacement current samplers

    DOE Patents [OSTI]

    McEwan, Thomas E.

    1996-01-01

    A low component count, high speed sample gate, and digitizer architecture using the sample gates is based on use of a signal transmission line, a strobe transmission line and a plurality of sample gates connected to the sample transmission line at a plurality of positions. The sample gates include a strobe pickoff structure near the strobe transmission line which generates a charge displacement current in response to propagation of the strobe signal on the strobe transmission line sufficient to trigger the sample gate. The sample gate comprises a two-diode sampling bridge and is connected to a meandered signal transmission line at one end and to a charge-holding cap at the other. The common cathodes are reverse biased. A voltage step is propagated down the strobe transmission line. As the step propagates past a capacitive pickoff, displacement current i=c(dv/dT), flows into the cathodes, driving the bridge into conduction and thereby charging the charge-holding capacitor to a value related to the signal. A charge amplifier converts the charge on the charge-holding capacitor to an output voltage. The sampler is mounted on a printed circuit board, and the sample transmission line and strobe transmission line comprise coplanar microstrips formed on a surface of the substrate. Also, the strobe pickoff structure may comprise a planar pad adjacent the strobe transmission line on the printed circuit board.

  2. Transient digitizer with displacement current samplers

    DOE Patents [OSTI]

    McEwan, T.E.

    1996-05-21

    A low component count, high speed sample gate, and digitizer architecture using the sample gates is based on use of a signal transmission line, a strobe transmission line and a plurality of sample gates connected to the sample transmission line at a plurality of positions. The sample gates include a strobe pickoff structure near the strobe transmission line which generates a charge displacement current in response to propagation of the strobe signal on the strobe transmission line sufficient to trigger the sample gate. The sample gate comprises a two-diode sampling bridge and is connected to a meandered signal transmission line at one end and to a charge-holding cap at the other. The common cathodes are reverse biased. A voltage step is propagated down the strobe transmission line. As the step propagates past a capacitive pickoff, displacement current i=c(dv/dT), flows into the cathodes, driving the bridge into conduction and thereby charging the charge-holding capacitor to a value related to the signal. A charge amplifier converts the charge on the charge-holding capacitor to an output voltage. The sampler is mounted on a printed circuit board, and the sample transmission line and strobe transmission line comprise coplanar microstrips formed on a surface of the substrate. Also, the strobe pickoff structure may comprise a planar pad adjacent the strobe transmission line on the printed circuit board. 16 figs.

  3. Text-Alternative Version: LED Essentials- Technology, Applications, Advantages, Disadvantages

    Broader source: Energy.gov [DOE]

    Below is the text-alternative version of the LED Essentials - Technology, Applications, Advantages, Disadvantages webcast.

  4. New and Underutilized Technology: High Bay LED Lighting

    Broader source: Energy.gov [DOE]

    The following information outlines key deployment considerations for high bay LED lighting within the Federal sector.

  5. Plasma fusion and cold fusion

    SciTech Connect (OSTI)

    Hideo, Kozima

    1996-12-31

    Fundamental problems of plasma fusion (controlled thermonuclear fusion) due to the contradicting demands of the magnetic confinement of plasma and suppression of instabilities occurring on and in plasma are surveyed in contrast with problems of cold fusion. Problems in cold fusion due to the complicated constituents and types of force are explained. Typical cold fusion events are explained by a model based on the presence of trapped neutrons in cold fusion materials. The events include Pons-Fleishmann effect, tritium anomaly, helium 4 production, and nuclear transmutation. Fundamental hypothesis of the model is an effectiveness of a new concept--neutron affinity of elements. The neutron affinity is defined and some bases supporting it are explained. Possible justification of the concept by statistical approach is given.

  6. Switched-capacitor isolated LED driver

    DOE Patents [OSTI]

    Sanders, Seth R.; Kline, Mitchell

    2016-03-22

    A switched-capacitor voltage converter which is particularly well-suited for receiving a line voltage from which to drive current through a series of light emitting diodes (LEDs). Input voltage is rectified in a multi-level rectifier network having switched capacitors in an ascending-bank configuration for passing voltages in uniform steps between zero volts up to full received voltage V.sub.DC. A regulator section, operating on V.sub.DC, comprises switched-capacitor stages of H-bridge switching and flying capacitors. A current controlled oscillator drives the states of the switched-capacitor stages and changes its frequency to maintain a constant current to the load. Embodiments are described for isolating the load from the mains, utilizing an LC tank circuit or a multi-primary-winding transformer.

  7. DOE ZERH Webinar: LED Lighting Efficiency | Department of Energy

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

    LED Lighting Efficiency DOE ZERH Webinar: LED Lighting Efficiency Description: LED lighting offers efficiency and performance benefits we've never seen in traditional lighting technologies. Commercial buildings have seen rapid growth in LED deployment, and in the residential arena leading builders are now integrating LED lighting packages. And as with any new building system, there are integration challenges along with the process of consumer understanding and acceptance. This webinar will

  8. Optical inverse-square displacement sensor

    DOE Patents [OSTI]

    Howe, Robert D.; Kychakoff, George

    1989-01-01

    This invention comprises an optical displacement sensor that uses the inverse-square attenuation of light reflected from a diffused surface to calculate the distance from the sensor to the reflecting surface. Light emerging from an optical fiber or the like is directed onto the surface whose distance is to be measured. The intensity I of reflected light is angle dependent, but within a sufficiently small solid angle it falls off as the inverse square of the distance from the surface. At least a pair of optical detectors are mounted to detect the reflected light within the small solid angle, their ends being at different distances R and R+.DELTA.R from the surface. The distance R can then be found in terms of the ratio of the intensity measurements and the separation length as ##EQU1##

  9. Optical inverse-square displacement sensor

    DOE Patents [OSTI]

    Howe, R.D.; Kychakoff, G.

    1989-09-12

    This invention comprises an optical displacement sensor that uses the inverse-square attenuation of light reflected from a diffused surface to calculate the distance from the sensor to the reflecting surface. Light emerging from an optical fiber or the like is directed onto the surface whose distance is to be measured. The intensity I of reflected light is angle dependent, but within a sufficiently small solid angle it falls off as the inverse square of the distance from the surface. At least a pair of optical detectors are mounted to detect the reflected light within the small solid angle, their ends being at different distances R and R + [Delta]R from the surface. The distance R can then be found in terms of the ratio of the intensity measurements and the separation length as given in an equation. 10 figs.

  10. Effect of charge polarization on the Coulomb barrier for cold-fusion reactions

    SciTech Connect (OSTI)

    Ichikawa, Takatoshi; Iwamoto, Akira

    2005-06-01

    We estimate the decrease of the Coulomb-barrier height between colliding partners due to charge polarizations in the entrance channel for cold-fusion reactions. The resulting charge displacements between protons and neutrons are the sum of the surface- and volume-charge components. We show the difference between the charge polarization of light and heavy nuclei and the decrease of the Coulomb barrier height for synthesizing superheavy elements.

  11. Guides and Case Studies for Cold and Very Cold Climates | Department of

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

    Energy Cold and Very Cold Climates Guides and Case Studies for Cold and Very Cold Climates Map of the Cold &amp; Very Cold Zones of the United States. The far tips of North Dakota, Maine, and southern Alaska are shown as Very Cold. The northern half of the United States is shown as Cold. The U.S. Department of Energy (DOE) Building America program has developed a best practice guide and case studies to help builders improve whole-house energy performance in homes found in cold and very

  12. LED R&D Projects | Department of Energy

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

    LED R&D Projects LED R&D Projects DOE-funded LED R&D projects tackle the science and technology challenges that stand in the way of achieving SSL Program targets for LED efficacy, performance, and cost. All project selections align with the priorities and targets detailed in the SSL R&D Plan, updated annually with industry input. Learn more about R&D challenges to accelerate LED technology advances. View details about the current LED R&D projects below. Alternative

  13. Cold air systems: Sleeping giant

    SciTech Connect (OSTI)

    MacCracken, C.D. )

    1994-04-01

    This article describes how cold air systems help owners increase the profits from their buildings by reducing electric costs and improving indoor air quality through lower relative humidity levels. Cold air distribution involves energy savings, cost savings, space savings, greater comfort, cleaner air, thermal storage, tighter ducting, coil redesign, lower relative humidities, retrofitting, and improved indoor air quality (IAQ). It opens a door for architects, engineers, owners, builders, environmentalists, retrofitters, designers, occupants, and manufacturers. Three things have held up cold air's usage: multiple fan-powered boxes that ate up the energy savings of primary fans. Cold air room diffusers that provided inadequate comfort. Condensation from ducts, boxes, and diffusers. Such problems have been largely eliminated through research and development by utilities and manufacturers. New cold air diffusers no longer need fan powered boxes. It has also been found that condensation is not a concern so long as the ducts are located in air conditioned space, such as drop ceilings or central risers, where relative humidity falls quickly during morning startup.

  14. Fact #663: February 21, 2011 Clean Cities Program Petroleum Displacement

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

    Estimates for 2009 | Department of Energy 3: February 21, 2011 Clean Cities Program Petroleum Displacement Estimates for 2009 Fact #663: February 21, 2011 Clean Cities Program Petroleum Displacement Estimates for 2009 Each year, estimates are made of the amount of petroleum that is displaced by the efforts of the U.S. Department of Energy's Clean Cities Program. These estimates are based on data provided by Clean Cities Coalition coordinators around the country and serve as an indicator of

  15. Phase-field Modeling of Displacive Phase Transformations in Elasticall...

    Office of Scientific and Technical Information (OSTI)

    Phase-field Modeling of Displacive Phase Transformations in Elastically Anisotropic and Inhomogeneous Polycrystals Citation Details In-Document Search Title: Phase-field Modeling...

  16. Gage for measuring displacements in rock samples

    DOE Patents [OSTI]

    Holcomb, D.J.; McNamee, M.J.

    1985-07-18

    A gage for measuring diametral displacement within a rock sample for use in a rock mechanics laboratory and in the field, comprises a support ring housing a linear variable differential transformer (LVDT), a mounting screw, and a leaf spring. The mounting screw is adjustable and defines a first point of contact with the rock sample. The leaf spring has opposite ends fixed to the inner periphery of the mounting ring. An intermediate portion of the leaf spring projecting radially inward from the ring is formed with a dimple defining a second point of contact with the sample. The first and second points of contact are diametrically opposed to each other. The LVDT is mounted in the ring with its axis parallel to the line of measurement and its core rod received in the dimple of the leaf spring. Any change in the length of the line between the first and second support points is directly communicated to the LVDT. The leaf spring is rigid to completely support lateral forces so that the LVDT is free of all load for improved precision.

  17. Gage for measuring displacements in rock samples

    DOE Patents [OSTI]

    Holcomb, David J.; McNamee, Michael J.

    1986-01-01

    A gage for measuring diametral displacement within a rock sample for use in a rock mechanics laboratory and in the field, comprises a support ring housing a linear variable differential transformer, a mounting screw, and a leaf spring. The mounting screw is adjustable and defines a first point of contact with the rock sample. The leaf spring has opposite ends fixed to the inner periphery of the mounting ring. An intermediate portion of the leaf spring projecting radially inward from the ring is formed with a dimple defining a second point of contact with the sample. The first and second points of contact are diametrically opposed to each other. The LVDT is mounted in the ring with its axis parallel to the line of measurement and its core rod received in the dimple of the leaf spring. Any change in the length of the line between the first and second support points is directly communicated to the LVDT. The leaf spring is rigid to completely support lateral forces so that the LVDT is free of all load for improved precision.

  18. Demonstration Assessment of Light-Emitting Diode (LED) Roadway...

    Office of Scientific and Technical Information (OSTI)

    The LEDs had an average illuminance level of 0.91 foot candles compared to 1.29 fc for the HPS lamps. The LED luminairesmore cost 38,000 more than HPS lamps, yielding a lengthy ...

  19. File:(131112) Presentacion LAC LEDs.pdf | Open Energy Information

    Open Energy Info (EERE)

    (131112) Presentacion LAC LEDs.pdf Jump to: navigation, search File File history File usage File:(131112) Presentacion LAC LEDs.pdf Size of this preview: 800 600 pixels. Go to...

  20. Color Maintenance of LEDs in Laboratory and Field Applications

    SciTech Connect (OSTI)

    Royer, Michael; Tuttle, Ralph; Rosenfeld, Scott; Miller, Naomi

    2013-09-30

    GATEWAY program report on color shift data of LED lamps used in real-world applications as well as LED products monitored by the CALiPER program in a lab environment.

  1. Text-Alternative Version: Challenges in LED Research and Development

    Broader source: Energy.gov [DOE]

    Narrator: LEDs have made remarkable progress in the past decade and gained a strong foothold in the US marketplace. In 2012, LED lighting saved an estimated 71 trillion BTUs, equivalent to annual...

  2. Consortium Led by University of California, Berkeley Awarded...

    National Nuclear Security Administration (NNSA)

    Consortium Led by University of California, Berkeley Awarded 25M NNSA Grant for Nuclear ... award of 25 million to a University of California, Berkeley-led consortium of eight ...

  3. TESTING LED COLOR-TUNABLE PRODUCTS | Department of Energy

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

    TESTING LED COLOR-TUNABLE PRODUCTS TESTING LED COLOR-TUNABLE PRODUCTS Cover of CALiPER Report 23. New product capabilities and performance variables require new test methods to be ...

  4. Team Led by Argonne National Lab Selected as DOE's Batteries...

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

    Team Led by Argonne National Lab Selected as DOE's Batteries and Energy Storage Hub On ... to announce that a multi-partner team led by Argonne National Laboratory has been ...

  5. Reducing LED Costs Through Innovation | Department of Energy

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

    Reducing LED Costs Through Innovation Reducing LED Costs Through Innovation November 19, 2013 - 3:49pm Addthis A combination solid-state laser turret cutter and stamping machine ...

  6. DOE-Led Research Team Makes Significant Rare Earth Discovery...

    Office of Environmental Management (EM)

    DOE-Led Research Team Makes Significant Rare Earth Discovery DOE-Led Research Team Makes ... Energy (DOE) has found that rare earth elements (REEs) can be removed from two U.S. ...

  7. LED Traffic Lights Get Buy American Stamp | Department of Energy

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

    Red. Yellow. Green. What LED traffic signals don't say: Made in USA. That is changing. ... Lindsey Gsell is a Staff Writer for Energy Empowers. Addthis Related Articles LED traffic ...

  8. LEDs Go Ivy League: Princeton’s Dillon Gymnasium

    Office of Energy Efficiency and Renewable Energy (EERE)

    View the video about LED lighting in Dillon Gymnasium, a focal point of sports and recreation at Princeton since 1947. William Evans discusses measurable benefits of LED lighting in the gym and...

  9. CALiPER Application Summary Report 19. LED Linear Pendants

    SciTech Connect (OSTI)

    none,

    2012-10-01

    Report 19 reviews the independently tested performance of nine LED linear pendants and also evaluates a collection of 11 linear pendant products available in both an LED and fluorescent version.

  10. Model Specification for LED Roadway Luminaires, V2.0

    Broader source: Energy.gov [DOE]

    Version 2.0 of the Model Specification for LED Roadway Luminaires is now available. Changes are substantial and include streamlined structure and formatting, new diagrams, updated references, and leveraging of LED Lighting Facts® program guidance.

  11. To Bridge LEDs' Green Gap, Scientists Think Small

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

    ... This "direct" method isn't practical today because green LEDs are not as efficient as their blue and red counterparts. Instead, most white lighting today comes from blue LED light ...

  12. DOE Publishes GATEWAY Report on LED Lighting in a Performing...

    Energy Savers [EERE]

    LED Lighting in a Performing Arts Setting DOE Publishes GATEWAY Report on LED Lighting in a Performing Arts Setting August 6, 2014 - 2:46pm Addthis The U.S. Department of Energy ...

  13. Cold Test Facility - Hanford Site

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

    Projects & Facilities Cold Test Facility About Us About Hanford Cleanup Hanford History Hanford Site Wide Programs Contact Us 100 Area 118-K-1 Burial Ground 200 Area 222-S Laboratory 242-A Evaporator 300 Area 324 Building 325 Building 400 Area/Fast Flux Test Facility 618-10 and 618-11 Burial Grounds 700 Area B Plant B Reactor C Reactor Canister Storage Building and Interim Storage Area Canyon Facilities Cold Test Facility D and DR Reactors Effluent Treatment Facility Environmental

  14. REA Refrigerated Display Case LED Lighting Performance Specification |

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

    Department of Energy REA Refrigerated Display Case LED Lighting Performance Specification REA Refrigerated Display Case LED Lighting Performance Specification A Retailer Energy Alliances (REA) Project rea_refrig_display_spec.pdf (300.24 KB) More Documents & Publications CBEA LED Site Lighting Specification - Version 1.3, Released 2/15/2012 Model Specification for LED Roadway Luminaires, V2.0 CBEA High-Efficiency Parking Structure Lighting Specification

  15. List of LED Exit Signs Incentives | Open Energy Information

    Open Energy Info (EERE)

    upgrades Water Heaters Whole House Fans LED Exit Signs CHPCogeneration Biomass Photovoltaics Yes Energy Optimization (Electric) - Commercial Efficiency Program...

  16. Study: Environmental Benefits of LEDs Greater Than CFLs | Department of

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

    Energy Study: Environmental Benefits of LEDs Greater Than CFLs Study: Environmental Benefits of LEDs Greater Than CFLs December 9, 2013 - 4:13pm Addthis A three-part Energy Department-funded study indicates LEDs are more environmentally friendly than compact fluorescent and incandescent lights. | Energy Department graphic A three-part Energy Department-funded study indicates LEDs are more environmentally friendly than compact fluorescent and incandescent lights. | Energy Department graphic

  17. Supercomputers Help Identify Efficiency-Limiting Defects in LEDs

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

    Supercomputers Help Identify Efficiency-Limiting Defects in LEDs Supercomputers Help Identify Efficiency-Limiting Defects in LEDs July 18, 2016 Contact: Kathy Kincade, kkincade@lbl.gov, +1 510 495 2124 ChrisVanDerWalle PressReleaseImage A conceptual illustration of how defects in a crystal lattice might contribute to nonradiative recombination of electrons and holes in LEDs. Image: Peter Allen Light-emitting diodes (LEDs) have found firm footing in the lighting industry, not just for blue and

  18. Demonstration of Light-Emitting Diode (LED) Retrofit Lamps

    SciTech Connect (OSTI)

    Miller, N.

    2011-09-01

    GATEWAY program report on a demonstration of LED retrofit lamps at the Jordan Schnitzer Museum of art in Eugene, OR

  19. LED T8 Replacement Lamps | Department of Energy

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

    T8 Replacement Lamps LED T8 Replacement Lamps This documents provides an overview of LED T8 replacement lamps and helps define a reasonable minimum performance level for the purpose of plant-wide improvement. LED T8 Replacement Lamps (April 2010) (809.84 KB) More Documents & Publications Emerging Lighting Technology General Service LED Lamps Guiding Market Introduction of High-Performance SSL Products

  20. LED Parking Lot Lighting Working Group Fact Sheet

    SciTech Connect (OSTI)

    2008-10-01

    This fact sheet describes the Retailer Energy Alliance LED Parking Lot Lighting Working Group and its Technology Procurement Project.

  1. Considerations When Comparing LED and Conventional Lighting | Department of

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

    Energy Using LEDs » Considerations When Comparing LED and Conventional Lighting Considerations When Comparing LED and Conventional Lighting When comparing LED lighting performance to conventional lighting, buyers will want to consider energy efficiency, operating life and lumen depreciation, light output/distribution, color quality, color shift, dimmability, and expected lifetime. Energy efficiency The final energy efficiency of any lighting system depends on more than the efficacy of the

  2. CALiPER Snapshot Report: Indoor LED Luminaires

    SciTech Connect (OSTI)

    2014-04-01

    Snapshot reports use data from DOE's LED Lighting Facts product list to compare the LED performance to standard technologies, and are designed to help lighting retailers, distributors, designers, utilities, energy efficiency program sponsors, and other stakeholders understand the current state of the LED market and its trajectory.

  3. DOE Publishes Report on Color Stability of LED Lighting Products

    Broader source: Energy.gov [DOE]

    DOE has published a new GATEWAY report on color maintenance of LEDs in laboratory and field applications, summarizing color shift data of LED lamps used in real-world applications as well as LED products monitored by the CALiPER program in a lab

  4. LED Luminaire Lifetime: Recommendations For Testing and Reporting |

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

    Department of Energy Luminaire Lifetime: Recommendations For Testing and Reporting LED Luminaire Lifetime: Recommendations For Testing and Reporting LED Luminaire Lifetime: September 2014 (774.47 KB) More Documents & Publications System Reliability Model for Solid-State Lighting Luminaires LED LUMINAIRE LIFETIME: Recommendations for Testing and Reporting Lifetime and Reliability

  5. To Bridge LEDs' Green Gap, Scientists Think Small

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

    To Bridge LEDs' Green Gap, Scientists Think Small To Bridge LEDs' Green Gap, Scientists Think Small Nanostructures Half a DNA Strand-Wide Show Promise for Efficient LEDs April 4, 2014 Contact: Margie Wylie, mwylie@lbl.gov, +1 510 486 7421 Nanostructures half the breadth of a DNA strand could improve the efficiency of light emitting diodes (LEDs), especially in the "green gap," a portion of the spectrum where LED efficiency plunges, simulations at the U.S. Department of Energy's

  6. Cold fusion; Myth versus reality

    SciTech Connect (OSTI)

    Rabinowitz, M. )

    1990-01-01

    Experiments indicate that several different nuclear reactions are taking place. Some of the experiments point to D-D fusion with a cominant tritium channel as one of the reactions. The article notes a similarity between Prometheus and the discoveries of cold fusion.

  7. Nattoh model for cold fusion

    SciTech Connect (OSTI)

    Matsumoto, T. . Dept. of Nuclear Engineering)

    1989-12-01

    A hypothetical model, the Nattoh model, is proposed to answer the questions that result from cold fusion experiments. This model proposes the formation of a small cluster of deuterons and examines the feasibility of many-body fusion reactions. The gamma-ray spectrum, heat production, neutron emissions, and fusion products are discussed.

  8. Modified Newmark model for seismic displacements of compliant slopes

    SciTech Connect (OSTI)

    Kramer, S.L.; Smith, M.W.

    1997-07-01

    Newmark sliding block analyses are widely used for estimation of permanent displacements of slopes in earthquakes. The conventional Newmark model, however, neglects the dynamic response of the material above a potential failure surface. Decoupled procedures have been developed to account for that response, but they neglect the effects of permanent displacements on the response. A modified Newmark analysis that considers the dynamic response, including the effects of permanent displacements, of the material above the failure surface is presented. The modified Newmark analysis shows that the decoupled approach produces somewhat conservative estimates of permanent displacements for stiff and/or shallow failure masses, but that it may produce unconservative estimates for failure masses that are soft and/or deep. Many slopes of large, lined landfills may fall into this latter category. The notion of a slope spectrum, which illustrates the effect of the natural period of a potential failure mass on permanent slope displacement, is also introduced.

  9. Cree Sets New Benchmarks for LED Efficacy and Brightness

    Broader source: Energy.gov [DOE]

    Cree has successfully created a cool white LED prototype that delivers 107 lm/W at 350mA. This achievement builds on the Cree EZBright® LED chip platform, developed in part with prior funding support from DOE. Cree made the prototype LED under their DOE project focused on developing LED chips incorporating photonic crystal elements for improved light extraction and novel package technology for higher down-conversion efficiency compared to conventional LEDs. Based on a 1 millimeter-square chip, the new prototype LED produces white light with a CCT of 5500K and a CRI of 73. Integration of four of these prototype LEDs can produce luminous flux of more than 450 lumens.

  10. Cold fusion in condensed matter

    SciTech Connect (OSTI)

    Schommers, W.; Politis, C. )

    1989-01-01

    A model for cold fusion in condensed matter is proposed (cold fusion of deuterons in palladium). It is assumed that the palladium-deuterium system forms an alloy, i.e., it is assumed that Pd ions as well as d/sup +/ ions are embedded in an uniform background of negative charge (conduction electrons). The model is based on an interaction potential for deuterons in solid palladium which has been estimated by means of a theoretical picture well known in the physics of liquids. In particular, the following effects are possible: 1. Cold fusion in condensed matter can take place. 2. The observed energy should be larger than that given by the fusion reactions. 3. Hitherto unknown nuclear processes must not be postulated as reported by Fleischmann and Pons. 4. The deuterons are mobile. 5. The deuterons can form close-packed clusters, and in principle a fusion reaction can take place within such a cluster. 6. Not only /sup 3/He should be produced in Pd but possible /sup 4/He too. From their theoretical picture, it can be concluded that experimental results will be strongly dependent on the condition of the materials used in the experiments. This can possible explain that only a part of experiments could show up cold fusion. A well defined condition (lattice defects, different phases, impurities, etc.) of the materials is probably the most critical point in connection with the observation of cold fusion in condensed matter. The effect should also be influenced by lattice dilatations. Experiments with other materials instead of palladium (e.g. vanadium, titanium, lanthanide metals, and different alloys) should be probably more informative.

  11. Advanced energy conversion methods for cold fusion

    SciTech Connect (OSTI)

    Prelas, M.A. )

    1989-09-01

    If cold fusion is verified, then the next important question deals with how it can be used to produce energy. Several direct energy conversion concepts for use with cold fusion are discussed.

  12. SHEAR STRENGTH MEASURING EQUIPMENT EVALUATION AT THE COLD TEST FACILITY

    SciTech Connect (OSTI)

    MEACHAM JE

    2009-09-09

    Retrievals under current criteria require that approximately 2,000,000 gallons of double-shell tank (DST) waste storage space not be used to prevent creating new tanks that might be susceptible to buoyant displacement gas release events (BDGRE). New criteria are being evaluated, based on actual sludge properties, to potentially show that sludge wastes do not exhibit the same BDGRE risk. Implementation of the new criteria requires measurement of in situ waste shear strength. Cone penetrometers were judged the best equipment for measuring in situ shear strength and an A.P. van den berg Hyson 100 kN Light Weight Cone Penetrometer (CPT) was selected for evaluation. The CPT was procured and then evaluated at the Hanford Site Cold Test Facility. Evaluation demonstrated that the equipment with minor modification was suitable for use in Tank Farms.

  13. Possible natural cold fusion in the atmosphere

    SciTech Connect (OSTI)

    Hawkins, N. )

    1991-07-01

    Nongeological natural cold fusion effects in meteoroelectrical disequilibria are possible, and various laboratory simulations of these effects are being studied.

  14. Cold fusion anomalies more perplexing than ever

    SciTech Connect (OSTI)

    Dagani, R

    1989-11-01

    This article addresses the debate over research on cold fusion. Analysis is made of the research efforts that have taken place since cold fusion was first thought to have been discovered in Utah. Research in the Soviet Union on the cold fusion phenomenon is also discussed.

  15. Floor-supply displacement air-conditioning: Laboratory experiments

    SciTech Connect (OSTI)

    Akimoto, Takashi; Nobe, Tatsuo; Tanabe, Shinichi; Kimura, Kenichi

    1999-07-01

    The results of laboratory measurements on the performance of a floor-supply displacement air-conditioning system in comparison to a displacement ventilation system with a side-wall-mounted diffuser and a ceiling-based distribution system are described. Thermal stratification was observed, as there were greater vertical air temperature differences in both of the displacement systems than in the ceiling-based system. The floor-supply displacement air-conditioning system produced a uniformly low air velocity at each measurement height, while a rather high air velocity near the floor was observed for the displacement ventilation system with a sidewall-mounted diffuser. Local mean age of air of the floor-supply displacement air-conditioning system was lower than that of the other systems, especially in the lower part of the room. According to the simulation results, the floor-supply displacement air-conditioning system with outdoor air cooling requires 34% less energy than the conventional air-conditioning system with outdoor air cooling.

  16. Surge recovery techniques for the Tevatron cold compressors

    SciTech Connect (OSTI)

    Martinez, A.; Klebaner, A.L.; Makara, J.N.; Theilacker, J.C.; /Fermilab

    2006-01-01

    The Fermilab Tevatron cryogenic system utilizes high-speed centrifugal cold compressors, made by Ishikawajima-Harima Heavy Industries Co. Ltd. (IHI), for high-energy operations [1]. The compressor is designed to pump 60 g/s of 3.6 K saturated helium vapor at a pressure ratio of 2.8, with an off-design range of 40 to 70 g/s and operating speeds between 40 and 95 krpm. Since initial commissioning in 1993, Tevatron transient conditions such as quench recovery have led to multiple-location machine trips as a result of the cold compressors entering the surge regime. Historically, compressors operating at lower inlet pressures and higher speeds have been especially susceptible to these machine trips and it was not uncommon to have multiple compressor trips during large multiple-house quenches. In order to cope with these events and limit accelerator down time, surge recovery techniques have been implemented in an attempt to prevent the compressors from tripping once the machine entered this surge regime. This paper discusses the different methods of surge recovery that have been employed. Data from tests performed at the Cryogenic Test Facility at Fermilab as well as actual Tevatron operational data were utilized. In order to aid in the determination of the surge region, a full mapping study was undertaken to characterize the entire pressure field of the cold compressor. These techniques were then implemented and tested at several locations in the Tevatron with some success.

  17. The reality of cold fusion

    SciTech Connect (OSTI)

    Case, L.C. )

    1991-12-01

    Despite the unreproducibility, doubt, and controversy involved in the question of the cold fusion of deuterium, enough good data have been published to clearly indicate the reality of some sort of nuclear fusion. Yamaguchi and Niushioka reported a thrice-repeated event in which large amounts of heat and definite bursts of neutrons evolved simultaneously with considerable out-gassing of absorbed deuterium. These results are consistent with nuclear fusion and not with a chemical reaction. In this paper a detailed mechanism is proposed that is consistent with these events and that also generally explains many of the scattered indications of cold fusion that have been reported. There must be an adventitiously large enough presence of tritium to initiate the nuclear reaction. The results of previously successful experiments cannot now be reproduced because currently available D{sub 2}O (and D{sub 2}) is so low in adventitious tritium as to preclude initiation of the nuclear reaction.

  18. Cold cathode vacuum discharge tube

    DOE Patents [OSTI]

    Boettcher, Gordon E.

    1998-01-01

    A cold cathode vacuum discharge tube, and method for making same, with an interior surface of the trigger probe coated with carbon deposited by carbon vapor deposition (CVD) or diamond-like carbon (DLC) deposition. Preferably a solid graphite insert is employed in the probe-cathode structure in place of an aluminum bushing employed in the prior art. The CVD or DLC probe face is laser scribed to allow resistance trimming to match available trigger voltage signals and to reduce electrical aging.

  19. Nationwide Limited Public Interest Waiver for LED and HVAC Units |

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

    Department of Energy Limited Public Interest Waiver for LED and HVAC Units Nationwide Limited Public Interest Waiver for LED and HVAC Units eere_nationwide_public_interest_waiver (55.98 KB) More Documents & Publications Nationwide Nonavailability Waiver: February 11, 2010 (Please note, the waiver for LED traffic signals has been withdrawn effective December 1, 2010) Nationwide Nonavailability Waiver: November 5, 2010 Amended Nationwide Nonavailability Waiver: November 5

  20. New DOE Report Estimates LED Savings in Common Lighting Applications |

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

    Department of Energy Report Estimates LED Savings in Common Lighting Applications New DOE Report Estimates LED Savings in Common Lighting Applications July 24, 2015 - 11:00am Addthis The U.S. Department of Energy (DOE) has released its latest report in a series analyzing markets where LEDs compete with traditional lighting sources. The new report, Adoption of Light-Emitting Diodes in Common Lighting Applications, reveals a wealth of insights into promising pathways for SSL technology

  1. Energy Department Announces New Investments in University-Led Nuclear

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

    Energy Innovation | Department of Energy in University-Led Nuclear Energy Innovation Energy Department Announces New Investments in University-Led Nuclear Energy Innovation September 27, 2012 - 11:07am Addthis WASHINGTON - As part of the Obama Administration's all-of-the-above energy strategy to deploy every available source of American energy and ensure the U.S. remains competitive globally, the Energy Department announced today more than $13 million in new investments for university-led

  2. Purchasing Energy-Efficient Commercial and Industrial LED Luminaires |

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

    Department of Energy Commercial and Industrial LED Luminaires Purchasing Energy-Efficient Commercial and Industrial LED Luminaires The Federal Energy Management Program (FEMP) provides acquisition guidance for commercial and industrial light emitting diode (LED) luminaires, a product category covered by FEMP efficiency requirements. Federal laws and requirements mandate that agencies purchase ENERGY STAR-qualified or FEMP-designated products in all product categories covered by these

  3. Successful Selection of LED Streetlight Luminaires: Optimizing Illumination

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

    and Economic Performance | Department of Energy Webcasts » Successful Selection of LED Streetlight Luminaires: Optimizing Illumination and Economic Performance Successful Selection of LED Streetlight Luminaires: Optimizing Illumination and Economic Performance This March 6, 2013 webcast reviewed the factors involved in successful selection of LED streetlight luminaires. Presenters Eric Haugaard of Cree Lighting and Chad Stalker of Philips Lumileds guided participants through the modeling of

  4. Color Maintenance of LEDs in Laboratory and Field Applications (Technical

    Office of Scientific and Technical Information (OSTI)

    Report) | SciTech Connect Color Maintenance of LEDs in Laboratory and Field Applications Citation Details In-Document Search Title: Color Maintenance of LEDs in Laboratory and Field Applications Synopsis: To date, consideration for parametric failure of LED products has largely been focused on lumen maintenance. However, color shift is a cause of early failure for some products, and is especially important to consider in certain applications, like museums, where visual appearance is

  5. Demonstration Assessment of LED Roadway Lighting: Philadelphia, PA

    Office of Scientific and Technical Information (OSTI)

    (Technical Report) | SciTech Connect Demonstration Assessment of LED Roadway Lighting: Philadelphia, PA Citation Details In-Document Search Title: Demonstration Assessment of LED Roadway Lighting: Philadelphia, PA For this demonstration assessment, 10 different groups of LED luminaires were installed at three sites in Philadelphia, PA. Each of the three sites represented a different set of conditions, most importantly with regard to the incumbent HPS luminaires, which were nominally 100 W,

  6. Cold cathode vacuum gauging system

    DOE Patents [OSTI]

    Denny, Edward C.

    2004-03-09

    A vacuum gauging system of the cold cathode type is provided for measuring the pressure of a plurality of separate vacuum systems, such as in a gas centrifuge cascade. Each casing is fitted with a gauge tube assembly which communicates with the vacuum system in the centrifuge casing. Each gauge tube contains an anode which may be in the form of a slender rod or wire hoop and a cathode which may be formed by the wall of the gauge tube. The tube is provided with an insulated high voltage connector to the anode which has a terminal for external connection outside the vacuum casing. The tube extends from the casing so that a portable magnet assembly may be inserted about the tube to provide a magnetic field in the area between the anode and cathode necessary for pressure measurements in a cold cathode-type vacuum gauge arrangement. The portable magnetic assembly is provided with a connector which engages the external high voltage terminal for providing power to the anode within in the gauge tube. Measurement is made in the same manner as the prior cold cathode gauges in that the current through the anode to the cathode is measured as an indication of the pressure. By providing the portable magnetic assembly, a considerable savings in cost, installation, and maintenance of vacuum gauges for pressure measurement in a gas centrifuge cascade is realizable.

  7. Low Cost, High Efficiency Tandem Silicon Solar Cells and LEDs...

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

    Building Energy Efficiency Building Energy ... Return to Search Low Cost, High Efficiency Tandem Silicon Solar Cells and LEDs ... gaps will lead to efficient power conversion. ...

  8. Adopting LED Technology: What Federal Facility Managers Need to Know

    Broader source: Energy.gov [DOE]

    This document describes the presentation slides for the "Adopting LED Technology: What Federal Facility Managers Need to Know" webinar that took place on September 11, 2014.

  9. Next-Generation LED Package Architectures Enabled by Thermally...

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

    This project will develop next-generation LED package architectures enabled by thermally conductive composite encapsulant materials utilizing boron nitride (BN). Nanoscale boron ...

  10. DOE Publishes GATEWAY Report on Successful LED Wall Washer Retrofit...

    Energy Savers [EERE]

    while retaining the quality of light when LED modules replaced 87 halogen lamps in existing wall washers at the University of Maryland's (UMD) Clarice Smith Performing Arts Center. ...

  11. LEDS Collaboration in Action Workshop Links | Open Energy Information

    Open Energy Info (EERE)

    LEDS Collaboration in Action Workshop Links Jump to: navigation, search Low Emission Development Strategies Global Partnership Advancing climate-resilient, low-emission development...

  12. LEDS Collaboration in Action Workshop Accommodations | Open Energy...

    Open Energy Info (EERE)

    LEDS Collaboration in Action Workshop Accommodations Jump to: navigation, search Low Emission Development Strategies Global Partnership Advancing climate-resilient, low-emission...

  13. LEDS Collaboration in Action Workshop Agenda | Open Energy Information

    Open Energy Info (EERE)

    LEDS Collaboration in Action Workshop Agenda Jump to: navigation, search Low Emission Development Strategies Global Partnership Advancing climate-resilient, low-emission...

  14. LEDS Collaboration in Action Workshop Participant Pack | Open...

    Open Energy Info (EERE)

    LEDS Collaboration in Action Workshop Participant Pack Jump to: navigation, search Low Emission Development Strategies Global Partnership Advancing climate-resilient, low-emission...

  15. Study: Environmental Benefits of LEDs Greater Than CFLs | Department...

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

    to date. The study - which evaluated not only the use but also the manufacturing, transport, and disposal of LED, CFL, and incandescent lamps throughout each product...

  16. New DOE Report Estimates LED Savings in Common Lighting Applications...

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

    report in a series analyzing markets where LEDs compete with traditional lighting sources. ... applications, as well as the potential energy savings if each of these ...

  17. Solid State Lighting LED Product Development and Manufacturing...

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

    ... introduced into the SSL system, protecting LED luminaires ... pump wavelengths and operating conditions, and the ... with the advance of human-robot interactions, natural ...

  18. LED Site Lighting in the Commercial Building Sector: Opportunities...

    Energy Savers [EERE]

    Site Lighting in the Commercial Building Sector: Opportunities, Challenges, and the CBEA Performance Specification LED Site Lighting in the Commercial Building Sector: ...

  19. Yuma Border Patrol Area Lighting Retrofit LED System Performance...

    Energy Savers [EERE]

    Host Site: Yuma Border Patrol, Yuma, Arizona April 2015 Prepared for: Solid-State Lighting ... Pacific Northwest National Laboratory Yuma Border Patrol Area Lighting Retrofit LED System ...

  20. Lighting for Health: LEDs in the New Age of Illumination

    SciTech Connect (OSTI)

    2014-05-01

    DOE Solid-State Lighting program technology fact sheet that provides background on current science and considerations related to LED light and health.

  1. DOE Announces Webinars on Maintenance Practices for LED Streetlights...

    Office of Environmental Management (EM)

    Webinar sponsor: DOE's Municipal Solid-State Street Lighting Consortium The Energy ... their cities' respective LED street lighting programs and lessons learned along the ...

  2. LED Lighting Facts/CALiPER Snapshot. Outdoor Ambient Lighting

    SciTech Connect (OSTI)

    2013-07-01

    Snapshot reports reveal how today's products really perform, drawing on analysis of verified performance data from the LED Lighting Facts program's online product list.

  3. Text-Alternative Version: LED Site Lighting in the Commercial...

    Energy Savers [EERE]

    Site Lighting in the Commercial Building Sector: Opportunities, Challenges, and the CBEA Performance Specification Text-Alternative Version: LED Site Lighting in the Commercial ...

  4. LEDS Collaboration in Action Workshop Open Space Sessions | Open...

    Open Energy Info (EERE)

    LEDS Collaboration in Action Workshop Open Space Sessions Jump to: navigation, search Low Emission Development Strategies Global Partnership Advancing climate-resilient,...

  5. Color Maintenance of LEDs in Laboratory and Field Applications...

    Office of Scientific and Technical Information (OSTI)

    Royer, Michael P.; Tuttle, Ralph; Rosenfeld, Scott M.; Miller, Naomi J. Light-emitting diode (LED), color shift, color stability, color maintenance, warranty Light-emitting...

  6. IADB/UNDP LEDS Community of Practice | Open Energy Information

    Open Energy Info (EERE)

    to communicate different methods for preparation of LED strategies including: The involvement of sectors and stakeholders Updating GHG inventories Preparation and analysis of...

  7. Demonstration of LED Street Lighting in Kansas City, MO (Technical...

    Office of Scientific and Technical Information (OSTI)

    not expected to be reached by the LED products until some distant future date (between 12 and 30 years after installation according to manufacturer specification sheet estimates). ...

  8. LEDs Go Ivy League: Princeton University and DOE GATEWAY Demonstrations

    Office of Energy Efficiency and Renewable Energy (EERE)

    View the video about LED lighting at Princeton University, which has dramatically reduced energy costs in a number of installations around campus. William Evans, electrical engineer, describes the...

  9. LEDS Collaboration in Action Workshop Biography | Open Energy...

    Open Energy Info (EERE)

    LEDS Collaboration in Action Workshop Biography Jump to: navigation, search Low Emission Development Strategies Global Partnership Advancing climate-resilient, low-emission...

  10. Reducing LED Costs Through Innovation | Department of Energy

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

    Researchers at Eaton are developing a new manufacturing process will enable LED chips to sit directly on heat sinks, improving heat transfer. | Photo courtesy of Eaton Corporation ...

  11. Energy Department Announces New University-Led Projects to Create...

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

    Chu announced today new investments totaling 10 million over five years for two university-led projects to advance innovative concentrating solar power (CSP) system technologies. ...

  12. Application Assessment of Bi-Level LED Parking Lot Lighting

    SciTech Connect (OSTI)

    Johnson, Megan; Cook, Tyson; Shackelford, Jordan; Pang, Terrance

    2009-02-01

    This report summarizes an assessment project conducted to evaluate light-emitting diode (LED) luminaires with bi-level operation in an outdoor parking lot application.

  13. LEDS Collaboration in Action Workshop Contact Us | Open Energy...

    Open Energy Info (EERE)

    LEDS Collaboration in Action Workshop Contact Us Jump to: navigation, search Low Emission Development Strategies Global Partnership Advancing climate-resilient, low-emission...

  14. LED Provides Effective and Efficient Parking Area Lighting at...

    Office of Environmental Management (EM)

    LED Provides Effective and Efficient Parking Area Lighting at the NAVFAC Engineering Service Center Document details new lighting technology that reduces energy consumption and ...

  15. #AskEnergySaver: LED Lights | Department of Energy

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

    LED Lights #AskEnergySaver: LED Lights April 24, 2014 - 6:00pm Addthis LED lights are six to seven times more energy efficient than conventional incandescent lights, cut energy use by more than 80 percent and can last more than 25 times longer. | Photo courtesy of Dennis Schroeder, NREL. LED lights are six to seven times more energy efficient than conventional incandescent lights, cut energy use by more than 80 percent and can last more than 25 times longer. | Photo courtesy of Dennis Schroeder,

  16. LED Color Stability: 10 Important Questions | Department of Energy

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

    LED Color Stability: 10 Important Questions LED Color Stability: 10 Important Questions This April 15, 2014 webinar examined the causes of color shift, and took a look at existing metrics used to describe color shift/color stability in LED lighting. The lumen maintenance lifetime of many LED products is 25,000 hours or more, but that doesn't mean products are guaranteed to perform the same over that time. One thing that could change is the color of the light, or chromaticity. Presenters Michael

  17. Model Specification for LED Roadway Luminaires Webcast | Department...

    Energy Savers [EERE]

    how it can be customized to meet the particular needs of individual organizations in order to help them put together effective bid documents for LED street lighting products. ...

  18. REA Refrigerated Display Case LED Lighting Performance Specification...

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

    A Retailer Energy Alliances (REA) Project PDF icon rearefrigdisplayspec.pdf More Documents & Publications CBEA LED Site Lighting Specification - Version 1.3, Released 2152012 ...

  19. High Impact Technology HQ - Results - LED Troffer, Cove (linear...

    Energy Savers [EERE]

    Icahn Laboratory More Documents & Publications DOE Booth Presentations From Grainger Show 2015 Downloads Exterior LED Lighting Projects at Princeton University Snapshot: Downlights

  20. LED LUMINAIRE LIFETIME: Recommendations for Testing and Reporting...

    Energy Savers [EERE]

    More Documents & Publications System Reliability Model for Solid-State Lighting Luminaires LED Luminaire Lifetime: Recommendations For Testing and Reporting System Reliability ...

  1. High Bandgap Phosphide Approaches for LED Applications - Energy...

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

    A new approach to fabricating high-efficiency Amber LEDs National Renewable Energy Laboratory Contact NREL About This Technology Publications: PDF Document Publication AlInP Green ...

  2. Adsorption, Desorption, and Displacement Kinetics of H2O and...

    Office of Scientific and Technical Information (OSTI)

    CO2. The onset of CO2 displacement by H2O occurs between 65 and 75 K. Authors: Smith, R. Scott ; Li, Zhenjun ; Dohnalek, Zdenek ; Kay, Bruce D. Publication Date:...

  3. Adsorption, Desorption, and Displacement Kinetics of H2O and...

    Office of Scientific and Technical Information (OSTI)

    4 H2O to 3 CO2 molecules is needed to displace CO2 from the TiO2(110) surface. Authors: Smith, R. Scott ; Li, Zhenjun ; Chen, Long ; Dohnalek, Zdenek ; Kay, Bruce D. Publication...

  4. Performance evaluation and design guidelines for displacement ventilation

    SciTech Connect (OSTI)

    Yuan, X.; Chen, Q.; Glicksman, L.R.

    1999-07-01

    This paper evaluates the performance of traditional displacement ventilation systems for small offices, large offices with partitions, classrooms, and industrial workshops under US thermal and flow boundary conditions, such as a high cooling load. With proper design, displacement ventilation can maintain a thermally comfortable environment that has a low air velocity, a small temperature difference between the head and foot level, and a low percentage of dissatisfied people. Compared with conventional mixing ventilation, displacement ventilation may provide better indoor air quality in the occupied zone when the contaminant sources are associated with the heat sources. The mean age of air is younger, and the ventilation effectiveness is higher. Based on results from Scandinavian countries and the authors' investigation of US buildings, this paper presents guidelines for designing displacement ventilation in the US.

  5. Measurement of Transient Atomic-scale Displacements in Thin Films...

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

    Measurement of Transient Atomic-scale Displacements in Thin Films with Picosecond and ... The inset shows a streak camera measurement of the x-ray pulse duration. Ultrafast x-ray ...

  6. LED Chips and Packaging for 120 LPW SSL Component

    SciTech Connect (OSTI)

    Ibbetson, James

    2009-12-28

    Cree has developed a new, high-efficiency, low-cost, light emitting diode (LED) lamp module that should be capable of replacing standard, halogen, fluorescent and metal halide lamps based on the total cost of ownership. White LEDs are produced by combining one or more saturated color LEDs with a phosphor or other light down-converting media to achieve white broad-band illumination. This two year project addressed LED chip and package efficiency improvements to establish a technology platform suitable for low-cost, high-efficiency commercial luminaires. Novel photonic-crystal LEDs were developed to improve the light extraction efficiency of blue GaN-based LEDs compared to the baseline technology. Improved packaging designs that reduced down-conversion and absorption related light losses, led to a higher overall LED efficiency. Specifically, blue LEDs were demonstrated with light output nearing 600 mW and an external quantum efficiency greater than 60 percent (using 1 mm2 chips at an operating current of 350 mA). The results were achieved using a novel, production capable photonic-crystal LED fabrication process. These LEDs formed the basis for a multi-chip white lamp module prototype, which provided 510 lumens light output at a correlated color temperature (CCT) of 3875 K and an operating current of 350 mA per 1mm2 chip. The overall conversion efficiency at 4100 K improved to ~ 65%. The resulting efficacy is 112 lumens per watt (LPW) a 33% improvement over the start of the project. In addition, a proof-of-concept luminaire was demonstrated that provided a flux of 1700 lumens at a 3842 K CCT.

  7. LANSCE | Lujan Center | Highlights | Local iron displacements and

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

    magnetoelastic coupling in a spin-ladder compound Local iron displacements and magnetoelastic coupling in a spin-ladder compound Hypothesis: Is magnetoelastic coupling in [FeX4]-based materials, an important ingredient in the emergence of superconductivity? Lujan Center: Combined Total Scattering and magnetic structure determination (HIPD-NPDF) The study of local, average and magnetic structure shows the existenceof highly correlated local iron (Fe) displacements in the spin-ladder iron

  8. Appraisers Project Plan: Wireless Controls and Retrofit LED Lighting Demonstration

    Broader source: Energy.gov [DOE]

    Appraisers Project Plan: Wireless Controls and Retrofit LED Lighting Demonstration Measurement and Verification Report This report details the measurement and verification tools and methods used to evaluate the effectiveness of wireless lighting controls and LED lighting at the Appraisers Building, a federal office building in San Francisco, CA.

  9. Low Cost Lithography Tool for High Brightness LED Manufacturing

    SciTech Connect (OSTI)

    Andrew Hawryluk; Emily True

    2012-06-30

    The objective of this activity was to address the need for improved manufacturing tools for LEDs. Improvements include lower cost (both capital equipment cost reductions and cost-ofownership reductions), better automation and better yields. To meet the DOE objective of $1- 2/kilolumen, it will be necessary to develop these highly automated manufacturing tools. Lithography is used extensively in the fabrication of high-brightness LEDs, but the tools used to date are not scalable to high-volume manufacturing. This activity addressed the LED lithography process. During R&D and low volume manufacturing, most LED companies use contact-printers. However, several industries have shown that these printers are incompatible with high volume manufacturing and the LED industry needs to evolve to projection steppers. The need for projection lithography tools for LED manufacturing is identified in the Solid State Lighting Manufacturing Roadmap Draft, June 2009. The Roadmap states that Projection tools are needed by 2011. This work will modify a stepper, originally designed for semiconductor manufacturing, for use in LED manufacturing. This work addresses improvements to yield, material handling, automation and throughput for LED manufacturing while reducing the capital equipment cost.

  10. Cold cathode vacuum discharge tube

    DOE Patents [OSTI]

    Boettcher, G.E.

    1998-04-14

    A cold cathode vacuum discharge tube, and method for making same, with an interior surface of the trigger probe coated with carbon deposited by chemical vapor deposition (CVD) or diamond-like carbon (DLC) deposition are disclosed. Preferably a solid graphite insert is employed in the probe-cathode structure in place of an aluminum bushing employed in the prior art. The CVD or DLC probe face is laser scribed to allow resistance trimming to match available trigger voltage signals and to reduce electrical aging. 14 figs.

  11. Cold cathode vacuum discharge tube

    DOE Patents [OSTI]

    Boettcher, G.E.

    1998-03-10

    A cold cathode vacuum discharge tube, and method for making same, are disclosed with an interior surface of the trigger probe coated with carbon deposited by carbon vapor deposition (CVD) or diamond-like carbon (DLC) deposition. Preferably a solid graphite insert is employed in the probe-cathode structure in place of an aluminum bushing employed in the prior art. The CVD or DLC probe face is laser scribed to allow resistance trimming to match available trigger voltage signals and to reduce electrical aging. 15 figs.

  12. International workshop on cold neutron sources

    SciTech Connect (OSTI)

    Russell, G.J.; West, C.D. )

    1991-08-01

    The first meeting devoted to cold neutron sources was held at the Los Alamos National Laboratory on March 5--8, 1990. Cosponsored by Los Alamos and Oak Ridge National Laboratories, the meeting was organized as an International Workshop on Cold Neutron Sources and brought together experts in the field of cold-neutron-source design for reactors and spallation sources. Eighty-four people from seven countries attended. Because the meeting was the first of its kind in over forty years, much time was spent acquainting participants with past and planned activities at reactor and spallation facilities worldwide. As a result, the meeting had more of a conference flavor than one of a workshop. The general topics covered at the workshop included: Criteria for cold source design; neutronic predictions and performance; energy deposition and removal; engineering design, fabrication, and operation; material properties; radiation damage; instrumentation; safety; existing cold sources; and future cold sources.

  13. LOW-COST LED LUMINAIRE FOR GENERAL ILLUMINATION

    SciTech Connect (OSTI)

    Lowes, Ted

    2014-07-31

    During this two-year Solid-State Lighting (SSL) Manufacturing R&D project Cree developed novel light emitting diode (LED) technologies contributing to a cost-optimized, efficient LED troffer luminaire platform emitting at ~3500K correlated color temperature (CCT) at a color rendering index (CRI) of >90. To successfully achieve program goals, Cree used a comprehensive approach to address cost reduction of the various optical, thermal and electrical subsystems in the luminaire without impacting performance. These developments built on Cree’s high- brightness, low-cost LED platforms to design a novel LED component architecture that will enable low-cost troffer luminaire designs with high total system efficacy. The project scope included cost reductions to nearly all major troffer subsystems as well as assembly costs. For example, no thermal management components were included in the troffer, owing to the optimized distribution of compact low- to mid-power LEDs. It is estimated that a significant manufacturing cost savings will result relative to Cree’s conventional troffers at the start of the project. A chief project accomplishment was the successful development of a new compact, high-efficacy LED component geometry with a broad far-field intensity distribution and even color point vs. emission angle. After further optimization and testing for production, the Cree XQ series of LEDs resulted. XQ LEDs are currently utilized in Cree’s AR series troffers, and they are being considered for use in other platforms. The XQ lens geometry influenced the independent development of Cree’s XB-E and XB-G high-voltage LEDs, which also have a broad intensity distribution at high efficacy, and are finding wide implementation in Cree’s omnidirectional A-lamps.

  14. Controlling LED Color-Tunable Products Text-alternative Version |

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

    Department of Energy Controlling LED Color-Tunable Products Text-alternative Version Controlling LED Color-Tunable Products Text-alternative Version This is the text-alternative version of Controlling LED Color-Tunable Products. Specifiers need to think very carefully when they are specifying controls for color-tunable luminaires. The ease of using that control is key. If the controls are too complex, they're not going to be used, or they're going to be abandoned or someone's going to

  15. Optimized Phosphors for Warm White LED Light Engines

    SciTech Connect (OSTI)

    Setlur, Anant; Brewster, Megan; Garcia, Florencio; Hill, M. Christine; Lyons, Robert; Murphy, James; Stecher, Tom; Stoklosa, Stan; Weaver, Stan; Happek, Uwe; Aesram, Danny; Deshpande, Anirudha

    2012-07-30

    The objective of this program is to develop phosphor systems and LED light engines that have steady-state LED efficacies (using LEDs with a 60% wall-plug efficiency) of 105–120 lm/W with correlated color temperatures (CCT) ~3000 K, color rendering indices (CRI) >85, <0.003 distance from the blackbody curve (dbb), and <2% loss in phosphor efficiency under high temperature, high humidity conditions. In order to reach these goals, this involves the composition and processing optimization of phosphors previously developed by GE in combination with light engine package modification.

  16. LED Traffic Lights Get Buy American Stamp | Department of Energy

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

    documents provides an overview of LED T8 replacement lamps and helps define a reasonable minimum performance level for the purpose of plant-wide improvement. LED T8 Replacement Lamps (April 2010) (809.84 KB) More Documents & Publications Emerging Lighting Technology Guiding Market Introduction of High-Performance SSL Products DOE Booth Presentations From Grainger Show 2015 Downloads

    LED traffic lights are assembled at Dialight’s factory in Roxboro, N.C. The company has expanded

  17. MOF Coating a Promising Path to White LEDs

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

    MOF Coating a Promising Path to White LEDs MOF Coating a Promising Path to White LEDs Print Friday, 27 February 2015 17:11 Hu et al. designed a new yellow phosphor with high quantum yield by immobilizing a preslected chromophore into the rigid framework of a metal-organic framework (MOF); the structure was determined at Beamline 11.3.1. Coating a blue light-emitting diode (LED) with this compound readily generates white light with high luminous efficacy. The new yellow phosphor demonstrates

  18. Shedding new light on LEDs | Argonne National Laboratory

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

    new light on LEDs By Louise Lerner * April 18, 2012 Tweet EmailPrint LEDs, or light-emitting diodes, are the secret behind your iPhone screen, flatscreen TVs, Christmas lights and crosswalk signals. They can last longer and save more energy than traditional incandescent bulbs. But there is one thing they aren't very good at: efficiently emitting light in the yellow-green spectrum. Argonne and Purdue researchers are peering deep into the atomic structure and composition of LED lights in order to

  19. Understanding LED Color-Tunable Products Text-alternative Version |

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

    Department of Energy Understanding LED Color-Tunable Products Text-alternative Version Understanding LED Color-Tunable Products Text-alternative Version This is the text-alternative version of Understanding LED Color-Tunable Products. Color-tunable luminaires are different from normal luminaires in that instead of being one constant color they can change in color. We have three basic flavors on the market. One is called dim-to-warm, which starts out at a normal whitish color-- like a 3000k

  20. University of Nevada Las Vegas LED Display Engineering

    SciTech Connect (OSTI)

    2010-08-31

    The primary objective of this part of the project is to develop and implement a method that compensates for the inefficiency of the green LED. The proposed engineering solution which will be the backbone of this project will be to use RGBW combination in every pixel to save energy. Two different RGBW geometrical pixel configurations will be implemented and compared against traditional LED configurations. These configurations will be analyzed for energy efficiency while keeping the quality of the display the same. Cost of the addition of white LEDs to displays along with energy cost savings will be presented and analyzed.

  1. DSA Implemented and Cold Operations Begin

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

    June 2, 2016 DSA Implemented and Cold Operations Begin The Department of Energy's (DOE) Waste Isolation Pilot Plant (WIPP) reached a major milestone last week that cleared the way for the start of Cold Operations at the facility. Implementation of the Documented Safety Analysis (DSA) revision 5, which defines the safety parameters under which WIPP operates, was declared complete on May 29, following several weeks of intense work by the federal and contractor workforce. Cold Operations, the phase

  2. Observation of stars produced during cold fusion

    SciTech Connect (OSTI)

    Matsumoto, T. . Dept. of Nuclear Engineering)

    1992-12-01

    It has been indicated tht multiple-neutron nuclei such as quad-neutrons can be emitted during cold fusion. These multiple-neutrons might bombard the nuclei of materials outside a cold fusion cell to cause nuclear reactions. In this paper, observations of nuclear emulsions that were irradiated during a cold fusion experiment with heavy water and palladium foil are described. Various traces, like stars, showing nuclear reactions caused by the multiple-neutrons have been clearly observed.

  3. Cold vacuum drying facility design requirements

    SciTech Connect (OSTI)

    IRWIN, J.J.

    1999-07-01

    This document provides the detailed design requirements for the Spent Nuclear Fuel Project Cold Vacuum Drying Facility. Process, safety, and quality assurance requirements and interfaces are specified.

  4. Type IV COPV Cold Gas Operation Challenges

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

    ... Dry ice cold spot other insl. Dry ice Unknowns Fatigue and impact behavior both at low ... tank and materials testing Ford Motor Company: Mike Veenstra, Dan Houston ...

  5. Evaporative cooling enhanced cold storage system

    DOE Patents [OSTI]

    Carr, P.

    1991-10-15

    The invention provides an evaporatively enhanced cold storage system wherein a warm air stream is cooled and the cooled air stream is thereafter passed into contact with a cold storage unit. Moisture is added to the cooled air stream prior to or during contact of the cooled air stream with the cold storage unit to effect enhanced cooling of the cold storage unit due to evaporation of all or a portion of the added moisture. Preferably at least a portion of the added moisture comprises water condensed during the cooling of the warm air stream. 3 figures.

  6. Evaporative cooling enhanced cold storage system

    DOE Patents [OSTI]

    Carr, Peter (Cary, NC)

    1991-01-01

    The invention provides an evaporatively enhanced cold storage system wherein a warm air stream is cooled and the cooled air stream is thereafter passed into contact with a cold storage unit. Moisture is added to the cooled air stream prior to or during contact of the cooled air stream with the cold storage unit to effect enhanced cooling of the cold storage unit due to evaporation of all or a portion of the added moisture. Preferably at least a portion of the added moisture comprises water condensed during the cooling of the warm air stream.

  7. Sandia National Laboratories: Cold War Warriors

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

    Cold War Warriors By Sue Major Holmes Thursday, April 28, 2016 The story of Sandia's decades in nuclear field testing Sandia videographer and documentarian Myra Buteau has produced ...

  8. LED Lighting on the National Mall | Department of Energy

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

    "Using energy-efficient LED light bulbs is an important way Americans can save money by saving energy," said Secretary Chu. "Investing in an American economy that is built to ...

  9. LEDS Collaboration in Action Workshop | Open Energy Information

    Open Energy Info (EERE)

    on LEDS globally. The workshop goals were to: Convene low emissions development and low carbon growth decision-makers Promote South-South and North-South collaboration and...

  10. White LED with High Package Extraction Efficiency (Technical...

    Office of Scientific and Technical Information (OSTI)

    Visit OSTI to utilize additional information resources in energy science and technology. A ... the blue light from the LED die and converts it into a broad green-yellow emission. ...

  11. Slideshow: Flipping the Switch on LED Lighting for the National...

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

    "Using energy-efficient LED light bulbs is an important way Americans can save money by saving energy," said Secretary Chu. "Investing in an American economy that is built to ...

  12. DOE Publishes Third GATEWAY Report on LED System Performance...

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

    the performance of LED luminaires in the Yuma (Arizona) Sector Border Patrol Area, on the U.S.-Mexico border, which is a high-temperature, high-solar-radiation environment. ...

  13. DOE Science Showcase - Light-emitting Diode (LED) Lighting Research...

    Office of Scientific and Technical Information (OSTI)

    LED Research Information in DOE Databases SciTech Connect National Library of EnergyBeta Science.gov Ciencia.Science.gov WorldWideScience.org Visit the Science Showcase homepage. ...

  14. EECBG Success Story: Solar LED Light Pilot Project Illuminates...

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

    solar-powered LED lights that replaced natural gas-powered streetlights in the city of Deming, New Mexico. | DOE photo EECBG Success Story: Energy Efficiency in New Mexico Frees ...

  15. Solid State Lighting LED Product Development and Manufacturing...

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

    ... The FY17 milestone remains a good target for luminaires. The typical price of a 3,500 lumen 2'x4' LED troffer at 100 lmW is currently about 90-95 per unit, however work is ...

  16. Demonstration Assessment of Light Emitting Diode (LED) Street...

    Energy Savers [EERE]

    Demonstration Assessment of Light Emitting Diode (LED) Street Lighting Host Site: City of Oakland, California Final Report prepared in support of the U.S. DOE Solid-State Lighting ...

  17. National Consortium Supports Cities in Evaluating LED Streetlights

    SciTech Connect (OSTI)

    2013-09-30

    Fact sheet that introduces Municipal Solid-State Street Lighting Consortium, a group of municipalities, utilities, and energy efficiency organizations who are interested in making investments in LED street and area lighting.

  18. LED Luminaire Lifetime: Recommendations for Testing and Reporting

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

    ... As of July 2013, 200 sample lamps had been continuously tested at a 45 o C ambient temperature for over 25,000 hours. This is perhaps the largest publicly available data set on LED ...

  19. Laboratory Evaluation of LED T8 Replacement Lamp Products

    SciTech Connect (OSTI)

    Richman, Eric E.; Kinzey, Bruce R.; Miller, Naomi J.

    2011-05-23

    A report on a lab setting analysis involving LED lamps intended to directly replace T8 fluorescent lamps (4') showing light output, power, and economic comparisons with other fluorescent options.

  20. Parking Savings Through LED Project for Iowa City | Department...

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

    grant and rebate from utility. City to save 66,000 annually with energy efficient LED lights in parking garages. Project will reduce energy usage by 1.4 million kWh...

  1. DOE Publishes Fact Sheet on LED Lighting and Health

    Broader source: Energy.gov [DOE]

    The U.S. Department of Energy has published a fact sheet that looks at what's known—and not known—about the effects of lighting on human health, with specific reference to LEDs. Entitled Lighting...

  2. Text-Alternative Version: LED Color Stability Webinar

    Broader source: Energy.gov [DOE]

    Michael Royer: All right, welcome ladies and gentleman. I'm Michael Royer of Pacific Northwest National Laboratory, and I'd like to welcome you to today's webinar on LED Color Stability, Ten...

  3. Advances in Chip Technology, Packaging Enable White LED Breakthroughs

    Broader source: Energy.gov [DOE]

    Significant advances in chip technology have enabled Cree, Inc.'s Santa Barbara Technology Center to demonstrate white LEDs with record efficacies as high as 74 lumens per watt - on par with...

  4. EECBG Success Story: Small Nebraska Town Welcomes LEDs and Energy...

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

    Welcomes LEDs and Energy Savings EECBG Success Story: Small Town Using Wind Power to Offset Electricity Costs EECBG Success Story: Out with the Old, In with the New: New ...

  5. Stage 1: Organizing the LEDS Process | Open Energy Information

    Open Energy Info (EERE)

    public and private sector capacity to support initiatives 2.4. Assess and improve the national GHG inventory and other economic and resource data as needed for LEDS development...

  6. Identify roles and responsibilities for LEDS process | Open Energy...

    Open Energy Info (EERE)

    public and private sector capacity to support initiatives 2.4. Assess and improve the national GHG inventory and other economic and resource data as needed for LEDS development...

  7. Demonstration Assessment of Light-Emitting Diode (LED) Roadway Lighting

    SciTech Connect (OSTI)

    Kinzey, B. R.; Myer, M. A.

    2009-11-01

    A U.S. Department of Energy Solid-State Lighting Gateway Report on a Demonstration Assessment of Light-Emitting Diode (LED) Roadway Lighting in Lija Loop, Portland, Oregon.

  8. EECBG Success Story: LEDs Ready for Takeoff at Louisiana Airport

    Broader source: Energy.gov [DOE]

    About 250 lights along the taxiway at Hammond Northshore Regional Airport in Louisiana are being replaced with light-emitting diodes (LEDs) with funds from an Energy Efficiency and Conservation Block Grant (EECBG). Learn more.

  9. LED Lights for All Occasions | Department of Energy

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

    What does this mean for me? Energy-efficient LED lights can be used to save money while decorating this holiday season. The topic of lighting is no stranger to the Energy Saver ...

  10. DOE Publishes GATEWAY Report on Portland's LED Streetlight Conversion...

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

    matters, and the Portland Bureau of Transportation was an early investigator of LED street lighting and one of the first public agencies to join DOE's Municipal Solid-State Street ...

  11. LED Watch: A Specifier's Guide to Color-Tunable Lighting

    Energy Savers [EERE]

    ... Some systems LED WATCH A SPECIFIER'S GUIDE TO COLOR-TUNABLE LIGHTING Be sure to check all the boxes when investigating the array of new products L ED luminaires with the ability to ...

  12. Integrated LED-based luminare for general lighting

    DOE Patents [OSTI]

    Dowling, Kevin J.; Lys, Ihor A.; Roberge, Brian; Williamson, Ryan C.; Roberts, Ron; Datta, Michael; Mollnow, Tomas; Morgan, Frederick M.

    2013-03-05

    Lighting apparatus and methods employing LED light sources are described. The LED light sources are integrated with other components in the form of a luminaire or other general purpose lighting structure. Some of the lighting structures are formed as Parabolic Aluminum Reflector (PAR) luminaires, allowing them to be inserted into conventional sockets. The lighting structures display beneficial operating characteristics, such as efficient operation, high thermal dissipation, high output, and good color mixing.

  13. Integrated LED-based luminaire for general lighting

    DOE Patents [OSTI]

    Dowling, Kevin J.; Lys, Ihor A.; Williamson, Ryan C.; Roberge, Brian; Roberts, Ron; Morgan, Frederick; Datta, Michael Jay; Mollnow, Tomas Jonathan

    2016-08-30

    Lighting apparatus and methods employing LED light sources are described. The LED light sources are integrated with other components in the form of a luminaire or other general purpose lighting structure. Some of the lighting structures are formed as Parabolic Aluminum Reflector (PAR) luminaires, allowing them to be inserted into conventional sockets. The lighting structures display beneficial operating characteristics, such as efficient operation, high thermal dissipation, high output, and good color mixing.

  14. Federally Led Accident Investigation Reports | Department of Energy

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

    Federally Led Accident Investigation Reports Federally Led Accident Investigation Reports Includes Pre-March 2011 Type A Reports April 21, 2015 Accident Investigations of the February 14, 2014, Radiological Release at the Waste Isolation Pilot Plant, Carlsbad, NM On Friday, February 14, 2014, there was a release of radioactive material in the underground repository at the Department of Energy (DOE) Waste Isolation Pilot Plant (WIPP) near Carlsbad, New Mexico. Following initial visual inspections

  15. Get the Facts: LED Street Lighting | Department of Energy

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

    Get the Facts: LED Street Lighting Get the Facts: LED Street Lighting June 21, 2016 - 12:11pm Addthis The American Medical Association's (AMA) recently adopted community guidance on street lighting adds another influential voice to issues that have been discussed in the lighting community for some time now, regarding light at night, its potential impacts on human health and the environment, and how best to minimize those impacts. While the AMA's guidance is intended to reduce the harmful human

  16. Gravitational waves found, black-hole models led the way

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

    Gravitational waves found, black-hole models led the way Gravitational waves found, black-hole models led the way Gravitational waves were predicted by Einstein's theory of general relativity in 1916, and now, almost exactly 100 years later, the faint ripples across space-time have been found. February 11, 2016 A simulation of two merging black holes, creating gravitational waves. Photo courtesy of LIGO. A simulation of two merging black holes, creating gravitational waves. Photo courtesy of

  17. LED Street Lighting Conversion Workshop Presentations | Department of

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

    Department of Energy View the video about CALiPER Report Series 21 on LED Linear Lamps and Troffer Lighting, featuring interviews with Tracy Beeson and Naomi Miller of Pacific Northwest National Laboratory. View the text-alternative version Department of Energy

    Luminaire Lifetime: September 2014 (774.47 KB) More Documents & Publications System Reliability Model for Solid-State Lighting Luminaires LED LUMINAIRE LIFETIME: Recommendations for Testing and Reporting Lifetime and

  18. White LED Benchmark of 65 Lumens Per Watt Achieved

    Broader source: Energy.gov [DOE]

    Novel chip design and the balance of multiple interrelated design parameters have enabled Cree, Inc.'s Santa Barbara Technology Center to demonstrate white LEDs with efficacies greater than 65 lumens per watt at 350 mA. The results are particularly significant because they were achieved with a pre-production prototype chip using the same package used in Cree's commercially available XLamp® 7090 high power LED, rather than a laboratory device.

  19. Analysis Led Intake Port Development | Department of Energy

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

    Led Intake Port Development Analysis Led Intake Port Development 2005 Diesel Engine Emissions Reduction (DEER) Conference Presentations and Posters 2005_deer_fuchinoue.pdf (537.33 KB) More Documents & Publications 2015 Peer Review Presentations-Cookstoves Vehicle Technologies Office Merit Review 2016: Lean Miller Cycle System Development for Light-Duty Vehicles High-Load Partially Premixed Combustion in a Heavy-Duty Diesel Engine

  20. Municipal Consortium LED Street Lighting Workshop Presentations and

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

    Materials-Boston, MA | Department of Energy Boston, MA Municipal Consortium LED Street Lighting Workshop Presentations and Materials-Boston, MA This page provides links to the presentations given at the DOE Municipal Solid-State Street Lighting Consortium Workshop held in Boston August 2-3, 2012. Workshop Agenda DOE Municipal Solid-State Street Lighting Consortium James Brodrick, U.S. Department of Energy Boston's LED Street Lighting Initiative Joanne Massaro, Glenn Cooper, Matthew Mayrl,

  1. LED Site Lighting in the Commercial Building Sector: Opportunities,

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

    Challenges, and the CBEA Performance Specification | Department of Energy Site Lighting in the Commercial Building Sector: Opportunities, Challenges, and the CBEA Performance Specification LED Site Lighting in the Commercial Building Sector: Opportunities, Challenges, and the CBEA Performance Specification This March 26, 2009 webcast presented information about the Commercial Building Energy Alliances' (CBEA) efforts to explore the viability of LED site lighting in commercial parking lots.

  2. An Integrated Solid-State LED Luminaire for General Lighting

    SciTech Connect (OSTI)

    Kevin Dowling; Fritz Morgan Ihor Lys; Mike Datta; Bernd Keller; Thomas Yuan

    2009-03-31

    A strong systems approach to designing and building practical LED-based replacement lamps is lacking. The general method of taking high-performance LEDs and marrying them to standard printed circuit boards, drivers and a heat sink has fallen short of the promise of LED lighting. In this program, a top-down assessment of requirements and a bottom-up reinvention of LED sources, electronics, optics and mechanics have resulted in the highest performance lamp possible. The team, comprised of Color Kinetics, the leaders in LED lighting and Cree, the leaders in LED devices took an approach to reinvent the package, the driver and the overall form and aesthetic of a replacement source. The challenge was to create a new benchmark in LED lighting - the resultant lamp, a PAR38 equivalent, met the light output, color, color quality and efficacy marks set out in the program as well as being dimmable, which is important for market acceptance. The approach combined the use of multiple source die, a chip-on-board approach, a very efficient driver topology, the use of both direct emission and phosphor conversion, and a unique faceted optic to avoid the losses, artifacts and hotspots of lensed approaches. The integral heat sink provided a mechanical base and airflow using a chimney-effect for use in a wide variety of locations and orientations. These research results led to a much better understanding of the system effects of component level technologies. It was clear that best-of-breed sub-system results do not necessarily result in the best end result for the complete system. In doing this work, we did not neglect the practical aspects of these systems. These were not rarified results and commercially impractical but lent themselves to eventual commercial products in the marketplace. The end result - a high performance replacement lamp - will save significant energy while providing a high-quality light source.

  3. Article Published on LED Lumen Maintenance and Light Loss Factors

    Broader source: Energy.gov [DOE]

    An article has been published in LEUKOS: The Journal of the Illuminating Engineering Society of North America (IES) that may be of interest to the solid-state lighting community. Entitled "Lumen Maintenance and Light Loss Factors: Consequences of Current Design Practices for LEDs," the article was written by Michael Royer of Pacific Northwest National Laboratory and discusses complications related to the lamp lumen depreciation (LLD) light loss factor and LEDs.

  4. Eddy current gauge for monitoring displacement using printed circuit coil

    DOE Patents [OSTI]

    Visioli, Jr., Armando J.

    1977-01-01

    A proximity detection system for non-contact displacement and proximity measurement of static or dynamic metallic or conductive surfaces is provided wherein the measurement is obtained by monitoring the change in impedance of a flat, generally spiral-wound, printed circuit coil which is excited by a constant current, constant frequency source. The change in impedance, which is detected as a corresponding change in voltage across the coil, is related to the eddy current losses in the distant conductive material target. The arrangement provides for considerable linear displacement range with increased accuracies, stability, and sensitivity over the entire range.

  5. Cold War | National Nuclear Security Administration

    National Nuclear Security Administration (NNSA)

    Cold War Paying tribute to our atomic veterans Glenn Podonsky, director of the U.S. Department of Energy's Office of Enterprise Assessment, pays tribute to the atomic veterans who worked at the Nevada National Security Site and other sites across the enterprise during the Cold War. He also introduced the video tribute below from Energy

  6. R-Cold: Order (2013-CE-5354)

    Broader source: Energy.gov [DOE]

    DOE ordered R-Cold, Inc. to pay a $8,000 civil penalty after finding R-Cold had failed to certify that any basic models of walk-in cooler or freezer components comply with the applicable energy conservation standards.

  7. Gauss Sum Factorization with Cold Atoms

    SciTech Connect (OSTI)

    Gilowski, M.; Wendrich, T.; Mueller, T.; Ertmer, W.; Rasel, E. M. [Institut fuer Quantenoptik, Leibniz Universitaet Hannover, Welfengarten 1, D-30167 Hannover (Germany); Jentsch, Ch. [Astrium GmbH-Satellites, 88039 Friedrichshafen (Germany); Schleich, W. P. [Institut fuer Quantenphysik, Universitaet Ulm, Albert-Einstein-Allee 11, D-89081 Ulm (Germany)

    2008-01-25

    We report the first implementation of a Gauss sum factorization algorithm by an internal state Ramsey interferometer using cold atoms. A sequence of appropriately designed light pulses interacts with an ensemble of cold rubidium atoms. The final population in the involved atomic levels determines a Gauss sum. With this technique we factor the number N=263193.

  8. Potential displacement of petroleum imports by solar energy technologies

    SciTech Connect (OSTI)

    DeLeon, P.; Jackson, B.L.; McNown, R.F.; Mahrenholz, G.J.

    1980-05-01

    The United States currently imports close to half of its petroleum requirements. This report delineates the economic, social, and political costs of such a foreign oil dependency. These costs are often intangible, but combined they clearly constitute a greater price for imported petroleum than the strictly economic cost. If we can assume that imported oil imposes significant socioeconomic costs upon the American economy and society, one way to reduce these costs is to develop alternative, domestic energy sources - such as solar energy technologies - which can displace foreign petroleum. The second half of this report estimates that by the year 2000, solar energy technologies can displace 3.6 quads of petroleum. This figure includes solar energy applications in utilities, industrial and agricultural process heat, and transportation. The estimate can be treated as a lower bound; if the United States were to achieve the proposed goal of 20 quads by 2000, the amount of displaced oil probably would be greater. Although all the displaced oil would not be imported, the reduction in imported petroleum would relieve many of the conditions that increase the present cost of foreign oil to the American consumer.

  9. Color Maintenance of LEDs in Laboratory and Field Applications

    SciTech Connect (OSTI)

    Royer, Michael P.; Tuttle, Ralph; Rosenfeld, Scott M.; Miller, Naomi J.

    2013-09-30

    Synopsis: To date, consideration for parametric failure of LED products has largely been focused on lumen maintenance. However, color shift is a cause of early failure for some products, and is especially important to consider in certain applications, like museums, where visual appearance is critical. Example data collected by the GATEWAY program for LED lamps installed in museums shows that many have changed color beyond a reasonable tolerance well before their rated lifetime was reached, necessitating replacement. Similar data collected by the CALiPER program between 2008 and 2010 reveals that many early products shifted beyond acceptable tolerances in as little as a few thousand hours. In contrast, data from the L Prize program illustrates that commercially available LED products can have exemplary color stability that is unmatched by traditional light sources. Beyond presenting data from the aforementioned DOE programs, this report discusses the metrics used for communicating color shift—namely MacAdam ellipses and Δu'v'—as well as providing guidance for end users on how to monitor color shift and what to look for in manufacturer warranties. Also included are descriptions of the physical changes that have been documented as leading to color shift in some example types of LED packages. As with complete products, the data presented herein for LED packages shows that a wide variety of products are available; in order for specifiers and consumers to make educated choices, more detailed and standardized information should be made available.

  10. Highly Efficient Small Form Factor LED Retrofit Lamp

    SciTech Connect (OSTI)

    Steven Allen; Fred Palmer; Ming Li

    2011-09-11

    This report summarizes work to develop a high efficiency LED-based MR16 lamp downlight at OSRAM SYLVANIA under US Department of Energy contract DE-EE0000611. A new multichip LED package, electronic driver, and reflector optic were developed for these lamps. At steady-state, the lamp luminous flux was 409 lumens (lm), luminous efficacy of 87 lumens per watt (LPW), CRI (Ra) of 87, and R9 of 85 at a correlated color temperature (CCT) of 3285K. The LED alone achieved 120 lumens per watt efficacy and 600 lumen flux output at 25 C. The driver had 90% electrical conversion efficiency while maintaining excellent power quality with power factor >0.90 at a power of only 5 watts. Compared to similar existing MR16 lamps using LED sources, these lamps had much higher efficacy and color quality. The objective of this work was to demonstrate a LED-based MR16 retrofit lamp for replacement of 35W halogen MR16 lamps having (1) luminous flux of 500 lumens, (2) luminous efficacy of 100 lumens per watt, (3) beam angle less than 40{sup o} and center beam candlepower of at least 1000 candelas, and (4) excellent color quality.

  11. LED Lighting: Applying Lessons Learned from the CFL Experience

    SciTech Connect (OSTI)

    McCullough, Jeffrey J.; Gilbride, Theresa L.; Gordon, Kelly L.; Ledbetter, Marc R.; Sandahl, Linda J.; Ton, My K.

    2008-08-20

    Light emitting diode (LED) technology has emerged as an exciting new lighting alternative with the potential for significant energy savings. There is concern, however, that white light LEDs for general illumination could take a long, bumpy course similar to another energy-efficient lighting technology – compact fluorescent lights (CFLs). Recognizing the significant potential energy-efficient lighting has to reduce U.S. energy consumption, Congress mandated in the Energy Policy Act of 2005 that the U.S. Department of Energy (DOE) develop Solid State Lighting (SSL) through a Next Generation Lighting Initiative. DOE’s first step was to analyze the market introduction of compact fluorescent lighting to determine what lessons could be learned to smooth the introduction of SSL in the United States (Sandahl et al. 2006). This paper summarizes applicable lessons learned from the market introduction of CFLs and describe how DOE and others are applying those lessons to speed the development and market introduction of energy-efficient LED lighting for general illumination applications. A description of the current state of LED technology and compares LEDs to incandescent, fluorescent, and halogen lights is also provided.

  12. Tests gauge LED sensors for fuel-dye measurements

    SciTech Connect (OSTI)

    Ozanich, Richard M.; Lucke, Richard B.; Melville, Angela M.; Wright, Bob W.

    2009-10-19

    The goal of this work was to develop a low cost, robust sensor to allow direct measurement of Solvent Red 164 dye concentration in off-road fuel at refineries and fuel terminals. Optical absorption sensors based on light emitting diodes (LEDs) are rugged, low-cost, have low power consumption, and can be designed to be intrinsically safe.LED-based systems have been used in a variety of chemical detection applications including heavy metals, pH, CO2, and O2. The approach for this work was to develop a sensor that could be mounted on a pipeline sight glass, precluding the need for direct contact of the sensor with the fuel. Below is described the design and testing of three different LED/photodiode sensors utilizing reflectance spectrometry for the measurement of dye concentration.

  13. New analogies between extreme QCD and cold atoms

    SciTech Connect (OSTI)

    Nishida, Yusuke

    2012-08-15

    We discuss two new analogies between extreme QCD and cold atoms. One is the analogue of 'hard probes' in cold atoms. The other is the analogue of 'quark-hadron continuity' in cold atoms.

  14. LED Down-Converter Phosphor Chips Containing Nanocrystals | Department of

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

    April 15, 2014 webinar examined the causes of color shift, and took a look at existing metrics used to describe color shift/color stability in LED lighting. The lumen maintenance lifetime of many LED products is 25,000 hours or more, but that doesn't mean products are guaranteed to perform the same over that time. One thing that could change is the color of the light, or chromaticity. Presenters Michael Royer of Pacific Northwest National Laboratory, Ralph Tuttle of Cree, and Chad Stalker of

  15. LED Holiday Lights: Festive, Safe, and Efficient! | Department of Energy

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

    LED Holiday Lights: Festive, Safe, and Efficient! LED Holiday Lights: Festive, Safe, and Efficient! November 23, 2010 - 6:30am Addthis Allison Casey Senior Communicator, NREL This week brings a day that many people look forward to all year-and I'm not talking about Thanksgiving, or Black Friday. I'm talking about that magical day when it's finally okay to drag the dusty boxes from the basement or attic, to lovingly sort and display your decorations, to untangle your light strings and set up the

  16. Linking Legacies: Connecting the Cold War Nuclear Weapons Production...

    Office of Environmental Management (EM)

    Linking Legacies: Connecting the Cold War Nuclear Weapons Production Processes to Their Environmental Consequences Linking Legacies: Connecting the Cold War Nuclear Weapons ...

  17. Advanced Composite Materials for Cold and Cryogenic Hydrogen...

    Office of Environmental Management (EM)

    Composite Materials for Cold and Cryogenic Hydrogen Storage Applications in Fuel Cell Electric Vehicles Workshop Advanced Composite Materials for Cold and Cryogenic Hydrogen ...

  18. Baby It's Cold Outside: Best Practices for Chilly Climes (101...

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

    Baby It's Cold Outside: Best Practices for Chilly Climes (101) Baby It's Cold Outside: Best Practices for Chilly Climes (101) Better Buildings Residential Network Peer Exchange ...

  19. Cold Bay Hot Spring Geothermal Area | Open Energy Information

    Open Energy Info (EERE)

    Cold Bay Hot Spring Geothermal Area Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Cold Bay Hot Spring Geothermal Area Contents 1 Area Overview 2 History and...

  20. The Department of Energy Announces Major Cold War Legacy Waste...

    Office of Environmental Management (EM)

    The Department of Energy Announces Major Cold War Legacy Waste Cleanup Milestone The Department of Energy Announces Major Cold War Legacy Waste Cleanup Milestone September 28, 2011 ...

  1. Centrality, Rapidity And Transverse-Momentum Dependence of Cold...

    Office of Scientific and Technical Information (OSTI)

    Centrality, Rapidity And Transverse-Momentum Dependence of Cold Nuclear Matter Effects on ... Title: Centrality, Rapidity And Transverse-Momentum Dependence of Cold Nuclear Matter ...

  2. Ultra-cold neutron fundamental physics experiments at LANSCE...

    Office of Scientific and Technical Information (OSTI)

    Ultra-cold neutron fundamental physics experiments at LANSCE Citation Details In-Document Search Title: Ultra-cold neutron fundamental physics experiments at LANSCE Authors: Saunders, ...

  3. Baby It's Cold Outside: Best Practices for Chilly Climes (101...

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

    Baby It's Cold Outside: Best Practices for Chilly Climes (101) Baby It's Cold Outside: Best Practices for Chilly Climes (101) November 5...

  4. CALiPER Application Summary Report 15. LED Floodlights

    SciTech Connect (OSTI)

    none,

    2012-05-01

    This report analyzes the independently tested performance of 10 LED floodlights purchased between August and December 2011. The group included a wide range of products, both physically and in performance characteristics, which mirrors the nearly indefinite range of conventional luminaires designated as floodlights.

  5. Small Nebraska Town Welcomes LEDs and Energy Savings

    Broader source: Energy.gov [DOE]

    Tecumseh’s town historic town square is home to the city hall, courthouse, post office, and during the summer months—a farmers market. Now, this historic square, built in the 1850’s, is about to become home to something new: LED lights.

  6. Small Area Array-Based LED Luminaire Design

    SciTech Connect (OSTI)

    Thomas Yuan

    2008-01-09

    This report contains a summary of technical achievements during a three-year project to demonstrate high efficiency LED luminaire designs based on small area array-based gallium nitride diodes. Novel GaN-based LED array designs are described, specifically addressing the thermal, optical, electrical and mechanical requirements for the incorporation of such arrays into viable solid-state LED luminaires. This work resulted in the demonstration of an integrated luminaire prototype of 1000 lumens cool white light output with reflector shaped beams and efficacy of 89.4 lm/W at CCT of 6000oK and CRI of 73; and performance of 903 lumens warm white light output with reflector shaped beams and efficacy of 63.0 lm/W at CCT of 2800oK and CRI of 82. In addition, up to 1275 lumens cool white light output at 114.2 lm/W and 1156 lumens warm white light output at 76.5 lm/W were achieved if the reflector was not used. The success to integrate small area array-based LED designs and address thermal, optical, electrical and mechanical requirements was clearly achieved in these luminaire prototypes with outstanding performance and high efficiency.

  7. Ultratech Develops an Improved Lithography Tool for LED Wafer Manufacturing

    Broader source: Energy.gov [DOE]

    Ultratech modified an existing lithography tool used for semiconductor manufacturing to better meet the cost and performance targets of the high-brightness LED manufacturing industry. The goal was to make the equipment compatible with the wide range of substrate diameters and thicknesses prevalent in the industry while reducing the capital cost and the overall cost of ownership (COO).

  8. 130 LPW 1000 Lm Warm White LED for Illumination

    SciTech Connect (OSTI)

    Soer, Wouter

    2012-06-14

    An illumination-grade warm-white LED, having correlated color temperature (CCT) between 2700 and 3500 K and capable of producing 1000 lm output at over 130 lm/W at room temperature, has been developed in this program. The high-power warm-white LED is an ideal source for use in indoor and outdoor lighting applications. Over the two year period, we have made the following accomplishments: • Developed a low-cost high-power white LED package and commercialized a series of products with CCT ranging from 2700 to 5700 K under the product name LUXEON M; • Demonstrated a record efficacy of 124.8 lm/W at a flux of 1023 lm, CCT of 3435 K and color rendering index (CRI) over 80 at room temperature in the productized package; • Demonstrated a record efficacy of 133.1 lm/W at a flux of 1015 lm, CCT of 3475 K and CRI over 80 at room temperature in an R&D package. The new high-power LED package is a die-on-ceramic surface mountable LED package. It has four 2 mm2 InGaN pump dice, flip-chip attached to a ceramic submount in a 2x2 array configuration. The submount design utilizes a design approach that combines a high-thermal- conductivity ceramic core for die attach and a low-cost and low-thermal-conductivity ceramic frame for mechanical support and as optical lens carrier. The LED package has a thermal resistance of less than 1.25 K/W. The white LED fabrication also adopts a new batch level (instead of die-by-die) phosphor deposition process with precision layer thickness and composition control, which provides not only tight color control, but also low cost. The efficacy performance goal was achieved through the progress in following key areas: (1) high-efficiency royal blue pump LED development through active region design and epitaxial growth quality improvement (funded by internal programs); (2) improvement in extraction efficiency from the LED package through improvement of InGaN-die-level and package-level optical extraction efficiency; and (3) improvement in phosphor

  9. Cold quark matter in compact stars

    SciTech Connect (OSTI)

    Franzon, B.; Fogaca, D. A.; Navarra, F. S.; Horvath, J. E.

    2013-03-25

    We used an equation of state for the cold quark matter to the study of properties of quark stars. We also discuss the absolute stability of quark matter and compute the mass-radius relation for self-bound stars.

  10. On a weak flavor for cold fusion

    SciTech Connect (OSTI)

    Chatterjee, L. . Dept. of Physics)

    1991-11-01

    In this paper the possibility of recent reports of cold fusion in deuterated metals being manifestations of primal nucleoweak reactions catalyzed by the host environment is investigated. Resulting experimental signatures are predicted.

  11. The possible hot nature of cold fusion

    SciTech Connect (OSTI)

    Kuehne, R.W. )

    1994-03-01

    Based on the model of micro hot fusion, the neutron emission rate of cold fusion is determined without the need for fine-tuning parameters. Moreover, the experimental conditions that are essential to reproduce fusion are determined. 84 refs.

  12. Theoretical and experimental study on regenerative rotary displacer Stirling engine

    SciTech Connect (OSTI)

    Raggi, L.; Katsuta, Masafumi; Isshiki, Naotsugu; Isshiki, Seita

    1997-12-31

    Recently a quite new type of hot air engine called rotary displacer engine, in which the displacer is a rotating disk enclosed in a cylinder, has been conceived and developed. The working gas, contained in a notch excavated in the disk, is heated and cooled alternately, on account of the heat transferred through the enclosing cylinder that is heated at one side and cooled at the opposite one. The gas temperature oscillations cause the pressure fluctuations that get out mechanical power acting on a power piston. In order to attempt to increase the performances for this kind of engine, the authors propose three different regeneration methods. The first one comprises two coaxial disks that, revolving in opposite ways, cause a temperature gradient on the cylinder wall and a regenerative axial heat conduction through fins shaped on the cylinder inner wall. The other two methods are based on the heat transferred by a proper closed circuit that in one case has a circulating liquid inside and in the other one is formed by several heat pipes working each one for different temperatures. An engine based on the first principle, the Regenerative Tandem Contra-Rotary Displacer Stirling Engine, has been realized and experimented. In this paper experimental results with and without regeneration are reported comparatively with a detailed description of the unity. A basic explanation of the working principle of this engine and a theoretical analysis investigating the main influential parameters for the regenerative effect are done. This new rotating displacer Stirling engines, for their simplicity, are expected to attain high rotational speed especially for applications as demonstration and hobby unities.

  13. Gas miscible displacement enhanced oil recovery: Technology status report

    SciTech Connect (OSTI)

    Not Available

    1986-10-01

    Gas miscible displacement enhanced oil recovery research is conducted by the US Department of Energy's Morgantown Energy Technology Center to advance the application of miscible carbon dioxide flooding. This research is an integral part of a multidisciplinary effort to improve the technology for producing additional oil from US resources. This report summarizes the problems of the technology and the 1986 results of the ongoing research that was conducted to solve those problems. Poor reservoir volumetric sweep efficiency is the major problem associated with gas flooding and all miscible displacements. This problem results from the channeling and viscous fingering that occur due to the large differences between viscosity or density of the displacing and displaced fluids (i.e., carbon dioxide and oil, respectively). Simple modeling and core flooding studies indicate that, because of differences in fluid viscosities, breakthrough can occur after only 30% of the total pore volume (PV) of the rock has been injected with gas, while field tests have shown breakthrough occurring much earlier. The differences in fluid densities lead to gravity segregation. The lower density carbon dioxide tends to override the residual fluids in the reservoir. This process would be considerably more efficient if a larger area of the reservoir could be contacted by the gas. Current research has focused on the mobility control, computer simulation, and reservoir heterogeneity studies. Three mobility control methods have been investigated: (1) the use of polymers for direct thickening of high-density carbon dioxide, (2) mobile ''foam-like dispersions'' of carbon dioxide and an aqueous surfactant, and (3) in situ deposition of chemical precipitates. 22 refs., 14 figs., 6 tabs.

  14. Compliant displacement-multiplying apparatus for microelectromechanical systems

    DOE Patents [OSTI]

    Kota, Sridhar; Rodgers, M. Steven; Hetrick, Joel A.

    2001-01-01

    A pivotless compliant structure is disclosed that can be used to increase the geometric advantage or mechanical advantage of a microelectromechanical (MEM) actuator such as an electrostatic comb actuator, a capacitive-plate electrostatic actuator, or a thermal actuator. The compliant structure, based on a combination of interconnected flexible beams and cross-beams formed of one or more layers of polysilicon or silicon nitride, can provide a geometric advantage of from about 5:1 to about 60:1 to multiply a 0.25-3 .mu.m displacement provided by a short-stroke actuator so that such an actuator can be used to generate a displacement stroke of about 10-34 .mu.m to operate a ratchet-driven MEM device or a microengine. The compliant structure has less play than conventional displacement-multiplying devices based on lever arms and pivoting joints, and is expected to be more reliable than such devices. The compliant structure and an associated electrostatic or thermal actuator can be formed on a common substrate (e.g. silicon) using surface micromachining.

  15. General displaced SU(1, 1) number states: Revisited

    SciTech Connect (OSTI)

    Dehghani, A. E-mail: a-dehghani@tabrizu.ac.ir

    2014-04-15

    The most general displaced number states, based on the bosonic and an irreducible representation of the Lie algebra symmetry of su(1, 1) and associated with the Calogero-Sutherland model are introduced. Here, we utilize the Barut-Girardello displacement operator instead of the Klauder-Perelomov counterpart, to construct new kind of the displaced number states which can be classified in nonlinear coherent states regime, too, with special nonlinearity functions. They depend on two parameters, and can be converted into the well-known Barut-Girardello coherent and number states, respectively, depending on which of the parameters equal to zero. A discussion of the statistical properties of these states is included. Significant are their squeezing properties and anti-bunching effects which can be raised by increasing the energy quantum number. Depending on the particular choice of the parameters of the above scenario, we are able to determine the status of compliance with flexible statistics. Major parts of the issue is spent on something that these states, in fact, should be considered as new kind of photon-added coherent states, too. Which can be reproduced through an iterated action of a creation operator on new nonlinear Barut-Girardello coherent states. Where the latter carry, also, outstanding statistical features.

  16. Study on the applicability of the desk displacement ventilation concept

    SciTech Connect (OSTI)

    Loomans, M.G.L.C.

    1999-07-01

    This paper summarizes an experimental and numerical study into a ventilation concept that combines displacement ventilation with task conditioning, the so-called desk displacement ventilation (DDV) concept. The study uses steady-state and transient results to discuss the applicability of the DDV concept for standard office room configurations. The evaluation of the concept focuses on the micro/macroclimate and thermal comfort. Results show that the separation between micro- and macroclimate, a characteristic of task conditioning, is less pronounced. Furthermore, the thermal comfort conditions at the desk limit the cooling capacity of a DDV system. Finally, the transient characteristics of the concept do not conform to stated requirements for task conditioning systems. The main conclusion, therefore, is that there is no particular advantage in sitting close to a displacement ventilation unit. An improvement of the DDV system is proposed by incorporating a parallel system that provides the fresh air near head level. The improvement of the combined system has been investigated using computational fluid dynamics.

  17. Residential Cold Climate Heat Pump (CCHP)

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

    Residential Cold Climate Heat Pump (CCHP) 2014 Building Technologies Office Peer Review Craig Messmer, craig@unicosystem.com Unico, Inc. The Unico Story * FAMILY OWNED U.S. MANUFACTURING BUSINESS in St. Louis, Missouri. * Largest SDHV manufacturer in the world with over 200,000 SQUARE FEET OF MANUFACTURING space. * Partnering with the U.S. Department of Energy to develop the next generation of HIGHLY EFFICIENT AND COST-EFFECTIVE HVAC systems. 2 The Unico Cold Climate Heat Pump (CCHP) * In

  18. Toxicity evaluation and hazard review Cold Smoke

    SciTech Connect (OSTI)

    Archuleta, M.M.; Stocum, W.E.

    1993-12-01

    Cold Smoke is a dense white smoke produced by the reaction of titanium tetrachloride and aqueous ammonia aerosols. Early studies on the toxicity of this nonpyrotechnically generated smoke indicated that the smoke itself is essentially non-toxic (i.e. exhibits to systemic toxicity or organ damage due to exposure) under normal deployment conditions. The purpose of this evaluation was to review and summarize the recent literature data available on the toxicity of Cold Smoke, its chemical constituents, and its starting materials.

  19. KLA-Tencor's Inspection Tool Reduces LED Manufacturing Costs

    Broader source: Energy.gov [DOE]

    With the help of DOE funding, KLA-Tencor is developing an improved inspection tool for LED manufacturing that promises to significantly increase overall process yields and minimize expensive waste. The power of the inspection tool lies in optical detection techniques coupled with defect source analysis software to statistically correlate front-end geometric anomalies in the substrate to killer defects on the back end of the manufacturing line, which give rise to an undesirable or unusable end product.

  20. Demonstration Assessment of LED Roadway Lighting: Philadelphia, PA

    SciTech Connect (OSTI)

    Royer, Michael P.; Tuenge, Jason R.; Poplawski, Michael E.

    2012-09-01

    For this demonstration assessment, 10 different groups of LED luminaires were installed at three sites in Philadelphia, PA. Each of the three sites represented a different set of conditions, most importantly with regard to the incumbent HPS luminaires, which were nominally 100 W, 150 W, and 250 W. The performance of each product was evaluated based on manufacturer data, illuminance calculations, field measurements of illuminance, and the subjective impressions of both regular and expert observers.

  1. OSRAM SYLVANIA Develops High-Efficiency LED Troffer Replacement

    Broader source: Energy.gov [DOE]

    With the help of DOE funding, OSRAM SYLVANIA is developing a high-efficiency LED 2'x2' troffer replacement that is expected to be commercially available in the spring of 2012 and to be cost-competitive with existing troffers of that size. It is projected to have a light output of up to 4,000 lumens, an efficacy of more than 100 lm/W, and a CCT of 3500K.

  2. Cold Facts staff tour JLab's cryogenic, SRF facilities (Cryogenic Society

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

    of America, Cold Facts) | Jefferson Lab Cold Facts staff tour JLab's cryogenic, SRF facilities (Cryogenic Society of America, Cold Facts) External Link: http://www.cryogenicsociety.org/csa_highlights/cold_facts_tours_jlab_cryogenics_... By jlab_admin on Sat, 2012-05-05

  3. Report 22.1: Photoelectric Performance of LED MR16 Lamps | Department of

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

    Energy 2.1: Photoelectric Performance of LED MR16 Lamps Report 22.1: Photoelectric Performance of LED MR16 Lamps caliper_22-1_mr16.pdf (4.52 MB) More Documents & Publications LED MR16 Lamps Caliper Retail Lamps Study 3.1: Dimming, Flicker, and Power Quality Characteristics of LED A Lamps LED Directional

  4. Demonstration of LED Street Lighting in Kansas City, MO

    SciTech Connect (OSTI)

    Kinzey, Bruce R.; Royer, Michael P.; Hadjian, M.; Kauffman, Rick

    2013-06-10

    Nine different streetlighting products were installed on various streets in Kansas City, Missouri during February, 2011, to evaluate their performance relative to the incumbent high-pressure sodium (HPS) lighting. The applications investigated included 100 W, 150 W, 250 W, and 400 W HPS installations. Initial measurements and comparisons included power, illuminance, and luminance; sample illuminance readings have continued at each of the nine locations at roughly 1,000-hour operating intervals since then. All of the LED products consumed less power than their HPS counterparts—with a mean difference of 39% and a range of 31% to 51%—but they also emitted 31% fewer lumens, on average. The net result is just a 15% increase in mean efficacy. Applying the city’s stringent light loss factors to the initial measured data meant that five of the LED products (and two of the HPS luminaires) were predicted to eventually fail to meet the specified mean illuminance over their lifetimes; however, the specified light loss levels are not expected to be reached by the LED products until some distant future date (between 12 and 30 years after installation according to manufacturer specification sheet estimates). The practical value of designing streetlighting systems to meet illumination requirements more than 15 years in the future is questioned. Numerous sources of variation in field measurements are noted throughout the report, particularly seasonal influences such as ambient temperature and foliage that are evident in the time-series illuminance data.

  5. Application Summary Report 22: LED MR16 Lamps

    SciTech Connect (OSTI)

    Royer, Michael P.

    2014-07-23

    This report analyzes the independently tested photometric performance of 27 LED MR16 lamps. It describes initial performance based on light output, efficacy, distribution, color quality, electrical characteristics, and form factor, with comparisons to a selection of benchmark halogen MR16s and ENERGY STAR qualification thresholds. Three types of products were targeted. First, CALiPER sought 3000 K lamps with the highest rated lumen output (i.e., at least 500 lm) or a claim of equivalency to a 50 W halogen MR16 or higher. The test results indicate that while the initial performance of LED MR16s has improved across the board, market-available products still do not produce the lumen output and center beam intensity of typical 50 W halogen MR16 lamps. In fact, most of the 18 lamps in this category had lower lumen output and center beam intensity than a typical 35 W halogen MR16 lamp. Second, CALiPER sought lamps with a CRI of 90 or greater. Only four manufacturers were identified with a product in this category. CALiPER testing confirmed the performance of these lamps, which are a good option for applications where high color fidelity is needed. A vast majority of the LED MR16 lamps have a CRI in the low 80s; this is generally acceptable for ambient lighting, but may not always be acceptable for focal lighting. For typical LED packages, there is a fundamental tradeoff between CRI and efficacy, but the lamps in the high-CRI group in this report still offer comparable performance to the rest of the Series 22 products in other performance areas. Finally, CALiPER sought lamps with a narrow distribution, denoted as a beam angle less than 15°. Five such lamps were purchased. Notably, no lamp was identified as having high lumen output (500 lumens or greater), high CRI (90 or greater), a narrow distribution (15° or less), and an efficacy greater than 60 lm/W. This would be an important achievement for LED MR16s especially if output could reach approximately 700 800 lumens

  6. Particle sorter comprising a fluid displacer in a closed-loop fluid circuit

    DOE Patents [OSTI]

    Perroud, Thomas D.; Patel, Kamlesh D.; Renzi, Ronald F.

    2012-04-24

    Disclosed herein are methods and devices utilizing a fluid displacer in a closed-loop fluid circuit.

  7. LED Lighting Facts® Program Supports Accuracy in SSL Product Information

    SciTech Connect (OSTI)

    2013-09-30

    Fact sheet that provides a summary of LED Lighting Facts, a program to assure that LED lighting is accurately represented in the marketplace, illustrated by the LED Lighting Facts label to disclose product performance data.

  8. New CALiPER Snapshot on LED Downlights | Department of Energy

    Office of Environmental Management (EM)

    New CALiPER Snapshot on LED Downlights New CALiPER Snapshot on LED Downlights June 29, 2016 - 12:56pm Addthis DOE's CALiPER program has released a new Snapshot report on LED ...

  9. Life-Cycle Assessment of Energy and Environmental Impacts of LED Lighting Products Part 2: LED Manufacturing and Performance

    SciTech Connect (OSTI)

    Scholand, Michael; Dillon, Heather E.

    2012-05-01

    Part 2 of the project (this report) uses the conclusions from Part 1 as a point of departure to focus on two objectives: producing a more detailed and conservative assessment of the manufacturing process and providing a comparative LCA with other lighting products based on the improved manufacturing analysis and taking into consideration a wider range of environmental impacts. In this study, we first analyzed the manufacturing process for a white-light LED (based on a sapphire-substrate, blue-light, gallium-nitride LED pumping a yellow phosphor), to understand the impacts of the manufacturing process. We then conducted a comparative LCA, looking at the impacts associated with the Philips Master LEDbulb and comparing those to a CFL and an incandescent lamp. The comparison took into account the Philips Master LEDbulb as it is now in 2012 and then projected forward what it might be in 2017, accounting for some of the anticipated improvements in LED manufacturing, performance and driver electronics.

  10. HVAC design considerations for cold climates

    SciTech Connect (OSTI)

    Armstrong, R.S. )

    1993-09-01

    The design of heating, ventilating and air-conditioning (HVAC) systems in cold climate areas requires modifications to the standard designs used in more temperate climates. While most of the US experiences freezing temperatures at least once during the winter months, certain areas experience several months of extended cold. No single location in the US experiences these extended cold conditions more than Alaska. While most areas in the continental US will not require modifications to standard design guidelines, many design modifications commonly used in the Arctic regions of Alaska and Canada can also be applied to any cold climate area in the continental US. The geographic area of Alaska is about one-third the size of the continental US. Climatic extremes range from Ketchikan with 6.697 heating degree days (at 55[degree]21 minutes N latitude) to Barrow with 20,341 heating degree days (at 71[degree]18 minutes N latitude), according to the Arctic Environmental Information and Data Center. The suggestions in this article are a compilation of general approaches the authors used to address the challenge of cold climate design. Of course, each detail design must be adapted to the specific climate and application at hand.

  11. Carbonaceous adsorbent regeneration and halocarbon displacement by hydrocarbon gases

    DOE Patents [OSTI]

    Senum, Gunnar I.; Dietz, Russell N.

    1994-01-01

    This invention describes a process for regeneration of halocarbon bearing carbonaceous adsorbents through which a carbonaceous adsorbent is contacted with hydrocarbon gases, preferably propane, butane and pentane at near room temperatures and at atmospheric pressure. As the hydrocarbon gases come in contact with the adsorbent, the hydrocarbons displace the halocarbons by physical adsorption. As a result of using this process, the halocarbon concentration and the hydrocarbon eluant is increased thereby allowing for an easier recovery of pure halocarbons. By using the process of this invention, carbonaceous adsorbents can be regenerated by an inexpensive process which also allows for subsequent re-use of the recovered halocarbons.

  12. Carbonaceous adsorbent regeneration and halocarbon displacement by hydrocarbon gases

    DOE Patents [OSTI]

    Senum, G.I.; Dietz, R.N.

    1994-04-05

    This invention describes a process for regeneration of halocarbon bearing carbonaceous adsorbents through which a carbonaceous adsorbent is contacted with hydrocarbon gases, preferably propane, butane and pentane at near room temperatures and at atmospheric pressure. As the hydrocarbon gases come in contact with the adsorbent, the hydrocarbons displace the halocarbons by physical adsorption. As a result of using this process, the halocarbon concentration and the hydrocarbon eluant is increased thereby allowing for an easier recovery of pure halocarbons. By using the process of this invention, carbonaceous adsorbents can be regenerated by an inexpensive process which also allows for subsequent re-use of the recovered halocarbons. 8 figures.

  13. High Efficacy Green LEDs by Polarization Controlled MOVPE

    SciTech Connect (OSTI)

    Wetzel, Christian

    2013-03-31

    Amazing performance in GaInN/GaN based LEDs has become possible by advanced epitaxial growth on a wide variety of substrates over the last decade. An immediate push towards product development and worldwide competition for market share have effectively reduced production cost and generated substantial primary energy savings on a worldwide scale. At all times of the development, this economic pressure forced very fundamental decisions that would shape huge industrial investment. One of those major aspects is the choice of epitaxial growth substrate. The natural questions are to what extend a decision for a certain substrate will limit the ultimate performance and to what extent, the choice of a currently more expensive substrate such as native GaN could overcome any of the remaining performance limitations. Therefore, this project has set out to explore what performance characteristic could be achieved under the utilization of bulk GaN substrate. Our work was guided by the hypotheses that line defects such as threading dislocations in the active region should be avoided and the huge piezoelectric polarization needs to be attenuated if not turned off for higher performing LEDs, particularly in the longer wavelength green and deep green portions of the visible spectrum. At their relatively lower performance level, deep green LEDs are a stronger indicator of relative performance improvements and seem particular sensitive to the challenges at hand. The project therefore made use of recently developed non-polar and semipolar bulk GaN substrates that were made available at Kyma Technologies by crystallographic cuts from thick polar growth of GaN. This approach naturally leads to rather small pieces of substrates, cm along the long side while mm along the short one. Small size and limited volume of sample material therefore set the limits of the ensuing development work. During the course of the project we achieved green and deep green LEDs in all those crystal growth

  14. Feedback-Controlled LED Photobioreactor for Photophysiological Studies of Cyanobacteria

    SciTech Connect (OSTI)

    Melnicki, Matthew R.; Pinchuk, Grigoriy E.; Hill, Eric A.; Kucek, Leo A.; Stolyar, Sergey; Fredrickson, Jim K.; Konopka, Allan; Beliaev, Alex S.

    2013-04-09

    A custom photobioreactor (PBR) was designed to enable automatic light adjustments using computerized feedback control. A black anodized aluminum enclosure, constructed to surround the borosilicate reactor vessel, prevents the transmission of ambient light and serves as a mount for arrays of light-emitting diodes (LEDs). The high-output LEDs provide narrow-band light of either 630 or 680 nm for preferential excitation of the cyanobacterial light-harvesting pigments, phycobilin or chlorophyll a, respectively. Custom developed software BioLume provides automatic control of optical properties and a computer feedback loop can automatically adjust the incident irradiance as necessary to maintain a fixed transmitted light through the culture, based on user-determined set points. This feedback control serves to compensate for culture dynamics which have optical effects, (e.g., changing cell density, pigment adaptations) and thus can determine the appropriate light conditions for physiological comparisons or to cultivate light-sensitive strains, without prior analyses. The LED PBR may also be controlled as a turbidostat, using a feedback loop to continuously adjust the rate of media-dilution based on the transmitted light measurements, with a fast and precise response. This cultivation system gains further merit as a high-performance analytical device, using non-invasive tools (e.g., dissolved gas sensors, online mass spectrometry) to automate real-time measurements, thus permitting unsupervised experiments to search for optimal growth conditions, to monitor physiological responses to perturbations, as well as to quantitate photophysiological parameters using an in situ light-saturation response routine.

  15. DOE Publishes New Report on Dimming LEDs with Phase-Cut Dimmers...

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

    by energy efficiency organizations and specifiers, and is ... The new report reviews how phase-cut dimmers work, how LEDs ... procedures for designing phase-controlled LED ...

  16. DOE Publishes CALiPER Report on LED T8 Lamps | Department of...

    Energy Savers [EERE]

    Likewise, some of the LED lamps had similar color quality and power quality to their fluorescent counterparts. But none of the LED products matched the luminous intensity ...

  17. Shenzhen Bang Bell Electronics Co Ltd BBE LED | Open Energy Informatio...

    Open Energy Info (EERE)

    Bang Bell Electronics Co Ltd BBE LED Jump to: navigation, search Name: Shenzhen Bang-Bell Electronics Co Ltd (BBE LED) Place: Shenzhen, Guangdong Province, China Zip: 518110...

  18. Use of Occupancy Sensors in LED Parking Lot and Garage Applications...

    Office of Scientific and Technical Information (OSTI)

    Experiences Kinzey, Bruce R.; Myer, Michael; Royer, Michael P.; Sullivan, Greg P. LED lighting; parking lot lighting; occupancy sensors LED lighting; parking lot lighting;...

  19. Demonstration Assessment of Light Emitting Diode (LED) Street Lighting, Final Report

    Office of Energy Efficiency and Renewable Energy (EERE)

    This report summarizes an LED street lighting assessment project conducted to study the applicability of LED luminaires in a street lighting application.

  20. Enhanced electrocaloric effect in displacive-type organic ferroelectrics

    SciTech Connect (OSTI)

    Ding, L. J. Zhong, Y.; Fan, S. W.; Zhu, L. Y.

    2015-08-07

    We explore the intrinsic feature of electrocaloric effect (ECE) accompanied by ferroelectric (FE)-paraelectric (PE) transition for displacive-type organic ferroelectrics using Green's function theory. It is demonstrated that decreasing elastic constant K or increasing spin-lattice coupling λ can enhance the ECE, as well as polarization P and transition temperature T{sub C}. Indeed, one expects that the optimal operating temperature for solid-state refrigeration is around room temperature, at which the ECE achieves its maximum. As T{sub C} is tuned to ∼310 K, it presents larger ECE response and remanent polarization with lower coercive field for smaller K value, suggesting that well flexible displacive-type organic ferroelectrics are excellent candidates both for electric cooling and data storage in the design of nonvolatile FE random-access memories. Furthermore, in an electric field, it provides a bridge between a Widom line that denotes FE-PE crossover above T{sub C} and a metaelectric transition line below T{sub C} that demonstrates an FE switching behavior with an antiparallel field.

  1. Convenient formulations for immiscible displacement in porous media

    SciTech Connect (OSTI)

    Civan, F.

    1996-12-31

    Convenient formulations of the immiscible displacement in porous media are presented and applied for waterflooding. The macroscopic equation of continuity for immiscible displacement is derived by porous media averaging. Richardson`s approach and the fractional flow formulation are extended and generalized for anisotropic and heterogeneous porous media. The integral transformations according to Douglas et al and the coordinate transformations presented in this paper lead to differential equations which do not involve the variable fluid and porous media properties explicitly in the differential operators. Fractional flow and unit end-point mobility ratio formulations are also derived for specific applications to reduce the computational requirements and accomplish rapid simulation of waterflooding of petroleum reservoirs. It is demonstrated by typical examples that the resulting equations can be discretized and solved more conveniently and accurately than the conventional formulation which require cumbersome discretization formulae for mixed derivatives involving the fluid and porous media properties. Therefore, the convenient formulations offer potential advantages over the usual formulation used in the simulation of waterflooding such as improved accuracy and reduced computational effort.

  2. High Efficiency Cold Climate Heat Pump

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

    High Efficiency Cold Climate Heat Pump 2014 Building Technologies Office Peer Review Bo Shen, shenb@ornl.gov Oak Ridge National Laboratory High Efficiency Cold Climate Heat Pump -(CCHP) CRADA Project Summary Timeline: Start date: 01-Oct-2010 Planned end date: 30-Sep-2015 Key Milestones (single-stage) 1. Equipment modeling and EnergyPlus simulation report - March/2013 2. Lab prototype fabricated and installed - Dec/2013 3. Meet 77% capacity at-13°F vs. 47°F; COP=4.1 at 47°F - March/2014

  3. Integrated Pilot Plant for a Large Cold Crucible Induction Melter

    SciTech Connect (OSTI)

    Do Quang, R.; Jensen, A.; Prod'homme, A.; Fatoux, R.; Lacombe, J.

    2002-02-26

    COGEMA has been vitrifying high-level liquid waste produced during nuclear fuel reprocessing on an industrial scale for over 20 years, with two main objectives: containment of the long lived fission products and reduction of the final volume of waste. Research performed by the French Atomic Energy Commission (CEA) in the 1950s led to the selection of borosilicate glass as the most suitable containment matrix for waste from spent nuclear fuel and to the development of the induction melter technology. This was followed by the commissioning of the Marcoule Vitrification Facility (AVM) in 1978. The process was implemented at a larger scale in the late 1980s in the R7 and T7 facilities of the La Hague reprocessing plant. COGEMA facilities have produced more than 11,000 high level glass canisters, representing more than 4,500 metric tons of glass and 4.5 billion curies. To further improve the performance of the vitrification lines in the R7 and T7 facilities, the CEA and COGEMA have been developing the Cold Crucible Melter (CCM) technology since the 1980s. This technology benefits from the 20 years of COGEMA HLW vitrification experience and ensures a virtually unlimited equipment service life and extensive flexibility in dealing with different types of waste. The high specific power directly transferred by induction to the melt allows high operating temperatures without any impact on the process equipment. In addition, the mechanical stirring of the melter significantly reduces operating constraints. COGEMA is already providing the CCM technology to international customers for nuclear and non-nuclear applications and plans to implement it in the La Hague vitrification plant for the vitrification of highly concentrated and corrosive solutions produced by uranium/molybdenum fuel reprocessing. The paper presents the CCM project that led to the building and start-up of this evolutionary and flexible pilot plant. It also describes the plant's technical characteristics and

  4. Cold Climates Heat Pump Design Optimization

    SciTech Connect (OSTI)

    Abdelaziz, Omar [ORNL] [ORNL; Shen, Bo [ORNL] [ORNL

    2012-01-01

    Heat pumps provide an efficient heating method; however they suffer from sever capacity and performance degradation at low ambient conditions. This has deterred market penetration in cold climates. There is a continuing effort to find an efficient air source cold climate heat pump that maintains acceptable capacity and performance at low ambient conditions. Systematic optimization techniques provide a reliable approach for the design of such systems. This paper presents a step-by-step approach for the design optimization of cold climate heat pumps. We first start by describing the optimization problem: objective function, constraints, and design space. Then we illustrate how to perform this design optimization using an open source publically available optimization toolbox. The response of the heat pump design was evaluated using a validated component based vapor compression model. This model was treated as a black box model within the optimization framework. Optimum designs for different system configurations are presented. These optimum results were further analyzed to understand the performance tradeoff and selection criteria. The paper ends with a discussion on the use of systematic optimization for the cold climate heat pump design.

  5. Cold fusion observed with ordinary water

    SciTech Connect (OSTI)

    Matsumoto, T. )

    1990-05-01

    This paper describes a cold fusion electrolysis experiment using ordinary water. A Ge(Li) detector is used to observe signals up to {approx}130 keV; these signals show the occurrence of fusion reactions in ordinary water. The mechanism for the emission of radiation is discussed by the Nattoh model.

  6. Interference phenomena observed during cold fusion

    SciTech Connect (OSTI)

    Matsumoto, T. )

    1992-03-01

    In this paper the interference phenomena of waves observed during a cold fusion experiment are described. Nuclear emissions have successfully recorded two different interference phenomena of waves from an electrolyzing cell. It is inferred that the waves might be gravitational and antigravitational waves, which can be expected to be radiated from gravity decays of quad-neutrons.

  7. Cold fusion studies in the USSR

    SciTech Connect (OSTI)

    Tsarev, V.A. ); Worledge, D.H. )

    1992-08-01

    In this paper work presented at the first Soviet National Conference on Cold Nuclear Fusion, which took place in March 1991 in Dubna and Moscow, is reviewed. In addition to an integrated view of the experimental and theoretical work, a description is given of some additional contributions that had appeared in the Soviet literature before the conference.

  8. Cold fusion; The story behind the headlines

    SciTech Connect (OSTI)

    Ault, M.R.

    1991-06-01

    This article looks at the cold fusion issue which got a lot of attention in 1989. It provides interesting background information, a brief explanation of the experimental methods and problems encountered, and the basis for some of the controversy. The current state of the research effort is also outlined.

  9. Neutron measurements in search of cold fusion

    SciTech Connect (OSTI)

    Anderson, R.E.; Goulding, C.A.; Johnson, M.W.; Butterfield, K.B.; Gottesfeld, S.; Baker, D.A.; Springer, T.E.; Garzon, F.H.; Bolton, R.D.; Leonard, E.M.; Chancellor, T. )

    1991-05-10

    We have conducted a search for neutron emission from cold fusion systems of the electrochemical type and, to a lesser extent, the high-pressure gas cell type. Using a high-efficiency well counter and an NE 213 scintillator, the experiments were conducted on the earth's surface and in a shielded cave approximately 50 ft underground. After approximately 6500 h of counting time, we have obtained no evidence for cold fusion processes leading to neutron production. However, we have observed all three types of neutron data that have been presented as evidence for cold fusion: large positive fluctuations in the neutron counting rate, weak peaks near 2.5 MeV in the neutron energy spectrum, and bursts of up to 140 neutrons in 500-{mu}s intervals. The data were obtained under circumstances that clearly show our results to be data encountered as a part of the naturally occurring neutron background, which is due primarily to cosmic rays. Thus, observing these types of data does not, of itself, provide evidence for the existence of cold fusion processes. Artifacts in the data that were due to counter misbehavior were also observed to lead to long-term neutron bursts'' whose time duration varied from several hours to several days. We conclude that any experiments which attempt to observed neutron emission must include strong steps to ensure that the experiments deal adequately with both cosmic-ray processes and counter misbehavior.

  10. Could spectator electrons legalize cold fusion

    SciTech Connect (OSTI)

    Chatterjee, L. . Dept. of Physics)

    1990-12-01

    In this paper the possibility of spectator electrons driving cold d-d fusion in condensed matter to an observation threshold is considered, along with the consequences on the branching ratio of the exit channels. The intrinsic dominance of the t-p channel due to the increased phase space is demonstrated.

  11. Nuclear waste vitrification efficiency: cold cap reactions

    SciTech Connect (OSTI)

    Hrma, Pavel R.; Kruger, Albert A.; Pokorny, Richard

    2012-12-15

    The cost and schedule of nuclear waste treatment and immobilization are greatly affected by the rate of glass production. Various factors influence the performance of a waste-glass melter. One of the most significant, and also one of the least understood, is the process of batch melting. Studies are being conducted to gain fundamental understanding of the batch reactions, particularly those that influence the rate of melting, and models are being developed to link batch makeup and melter operation to the melting rate. Batch melting takes place within the cold cap, i.e., a batch layer floating on the surface of molten glass. The conversion of batch to glass consists of various chemical reactions, phase transitions, and diffusion-controlled processes. These include water evaporation (slurry feed contains as high as 60% water), gas evolution, the melting of salts, the formation of borate melt, reactions of borate melt with molten salts and with amorphous oxides (Fe2O3 and Al2O3), the formation of intermediate crystalline phases, the formation of a continuous glass-forming melt, the growth and collapse of primary foam, and the dissolution of residual solids. To this list we also need to add the formation of secondary foam that originates from molten glass but accumulates on the bottom of the cold cap. This study presents relevant data obtained for a high-level-waste melter feed and introduces a one-dimensional (1D) mathematical model of the cold cap as a step toward an advanced three-dimensional (3D) version for a complete model of the waste glass melter. The 1D model describes the batch-to-glass conversion within the cold cap as it progresses in a vertical direction. With constitutive equations and key parameters based on measured data, and simplified boundary conditions on the cold-cap interfaces with the glass melt and the plenum space of the melter, the model provides sensitivity analysis of the response of the cold cap to the batch makeup and melter conditions

  12. NUCLEAR WASTE VITRIFICATION EFFICIENCY COLD CAP REACTIONS

    SciTech Connect (OSTI)

    KRUGER AA; HRMA PR; POKORNY R

    2011-07-29

    The cost and schedule of nuclear waste treatment and immobilization are greatly affected by the rate of glass production. Various factors influence the performance of a waste-glass melter. One of the most significant, and also one of the least understood, is the process of batch melting. Studies are being conducted to gain fundamental understanding of the batch reactions, particularly those that influence the rate of melting, and models are being developed to link batch makeup and melter operation to the melting rate. Batch melting takes place within the cold cap, i.e., a batch layer floating on the surface of molten glass. The conversion of batch to glass consists of various chemical reactions, phase transitions, and diffusion-controlled processes. These include water evaporation (slurry feed contains as high as 60% water), gas evolution, the melting of salts, the formation of borate melt, reactions of borate melt with molten salts and with amorphous oxides (Fe{sub 2}O{sub 3} and Al{sub 2}O{sub 3}), the formation of intermediate crystalline phases, the formation of a continuous glass-forming melt, the growth and collapse of primary foam, and the dissolution of residual solids. To this list we also need to add the formation of secondary foam that originates from molten glass but accumulates on the bottom of the cold cap. This study presents relevant data obtained for a high-level-waste melter feed and introduces a one-dimensional (1D) mathematical model of the cold cap as a step toward an advanced three-dimensional (3D) version for a complete model of the waste glass melter. The 1D model describes the batch-to-glass conversion within the cold cap as it progresses in a vertical direction. With constitutive equations and key parameters based on measured data, and simplified boundary conditions on the cold-cap interfaces with the glass melt and the plenum space of the melter, the model provides sensitivity analysis of the response of the cold cap to the batch makeup

  13. Theoretic base of Edge Local Mode triggering by vertical displacements

    SciTech Connect (OSTI)

    Wang, Z. T.; He, Z. X.; Wang, Z. H.; Wu, N.; Tang, C. J.

    2015-05-15

    Vertical instability is studied with R-dependent displacement. For Solovev's configuration, the stability boundary of the vertical instability is calculated. The pressure gradient is a destabilizing factor which is contrary to Rebhan's result. Equilibrium parallel current density, j{sub //}, at plasma boundary is a drive of the vertical instability similar to Peeling-ballooning modes; however, the vertical instability cannot be stabilized by the magnetic shear which tends towards infinity near the separatrix. The induced current observed in the Edge Local Mode (ELM) triggering experiment by vertical modulation is derived. The theory provides some theoretic explanation for the mitigation of type-I ELMS on ASDEX Upgrade. The principle could be also used for ITER.

  14. Experimental study on the floor-supply displacement ventilation system

    SciTech Connect (OSTI)

    Akimoto, Takashi; Nobe, Tatsuo; Takebayashi, Yoshihisa

    1995-12-31

    These results are presented from a research project to investigate the effects of a floor-supply displacement ventilation system with practical indoor heat loads. The experiments were performed in an experimental chamber (35.2 m{sup 2}) located in a controlled environment chamber. Temperature distributions were measured at seven heights throughout the experimental chamber for each test condition. Data were analyzed to observe thermal stratification as affected by lighting, occupants, and heat loads (personal computers), and its disruption caused by walking and change of air volume. In addition, airflow characteristics and ventilation efficiencies were investigated using a smoke machine, tobacco smoke, dust for industrial testing, and a tracer gas (CO{sub 2}) step-up procedure.

  15. Measurements and computations of room airflow with displacement ventilation

    SciTech Connect (OSTI)

    Yuan, X.; Chen, Q.; Glicksman, L.R.; Hu, Y.; Yang, X.

    1999-07-01

    This paper presents a set of detailed experimental data of room airflow with displacement ventilation. These data were obtained from a new environmental test facility. The measurements were conducted for three typical room configurations: a small office, a large office with partitions, and a classroom. The distributions of air velocity, air velocity fluctuation, and air temperature were measured by omnidirectional hot-sphere anemometers, and contaminant concentrations were measured by tracer gas at 54 points in the rooms. Smoke was used to observe airflow. The data also include the wall surface temperature distribution, air supply parameters, and the age of air at several locations in the rooms. A computational fluid dynamics (CFD) program with the Re-Normalization Group (RNG) {kappa}-{epsilon} model was also used to predict the indoor airflow. The agreement between the computed results and measured data of air temperature and velocity is good. However, some discrepancies exist in the computed and measured concentrations and velocity fluctuation.

  16. Lab begins demolition of Cold War-era buildings

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

    Demolition begins of cold War-Era buildings Lab begins demolition of Cold War-era buildings More than 165,000 square feet of former research, production, and office buildings will ...

  17. Recovery Act funds advance cleanup efforts at Cold War site

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

    Cleanup efforts at Cold War site Recovery Act funds advance cleanup efforts at Cold War site A local small business, ARSEC Environmental, LLC, of White Rock, NM, won a 2 million ...

  18. Cold-Start Performance and Emissions Behavior of Alcohol Fuels...

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

    Cold-Start Performance and Emissions Behavior of Alcohol Fuels in an SIDI Engine Using Transient Hardware-In-Loop Test Meth Discusses results of cold- and hot-start transient tests ...

  19. Improving Fuel Economy When the Weather's Cold | Department of...

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

    Fuel Economy When the Weather's Cold Improving Fuel Economy When the Weather's Cold February 25, 2014 - 9:49am Addthis Make sure your car is ready for spring snowstorms. | Photo...

  20. Improving Fuel Economy When the Weather's Cold | Department of...

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

    Improving Fuel Economy When the Weather's Cold Improving Fuel Economy When the Weather's Cold February 25, 2014 - 9:49am Addthis Make sure your car is ready for spring snowstorms....

  1. Centrality, Rapidity And Transverse-Momentum Dependence of Cold...

    Office of Scientific and Technical Information (OSTI)

    of Cold Nuclear Matter Effects on JPsi Production in D Au, Cu Cu And Au Au Collisions at ... of Cold Nuclear Matter Effects on JPsi Production in D Au, Cu Cu And Au Au Collisions at ...

  2. The temperature dependence of ultra-cold neutron wall losses...

    Office of Scientific and Technical Information (OSTI)

    Title: The temperature dependence of ultra-cold neutron wall losses in material bottles coated with deuterated polystryene Ultra-cold neutrons (UCN) from the LANSCE super-thermal ...

  3. PHEV Engine Cold Start Emissions Management | Department of Energy

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

    Cold Start Emissions Management PHEV Engine Cold Start Emissions Management Coordination of engine and powertrain supervisory control strategies to minimize cold start emissions p-05_chambon.pdf (369.94 KB) More Documents & Publications PHEV Engine Control and Energy Management Strategy PHEV Engine Control and Energy Management Strategy PHEV Engine Control and Energy Management Strategy

  4. Builders Challenge Guide to 40% Whole-House Energy Savings in the Cold and Very Cold Climate – Volume 12

    SciTech Connect (OSTI)

    Pacific Northwest National Laboratory

    2011-02-01

    This document describes measures builders can use to construct homes that have whole-house energy savings of 40% in the cold and very cold climate region of the United States.

  5. Regeneration of strong-base anion-exchange resins by sequential chemical displacement

    DOE Patents [OSTI]

    Brown, Gilbert M.; Gu, Baohua; Moyer, Bruce A.; Bonnesen, Peter V.

    2002-01-01

    A method for regenerating strong-base anion exchange resins utilizing a sequential chemical displacement technique with new regenerant formulation. The new first regenerant solution is composed of a mixture of ferric chloride, a water-miscible organic solvent, hydrochloric acid, and water in which tetrachloroferrate anion is formed and used to displace the target anions on the resin. The second regenerant is composed of a dilute hydrochloric acid and is used to decompose tetrachloroferrate and elute ferric ions, thereby regenerating the resin. Alternative chemical displacement methods include: (1) displacement of target anions with fluoroborate followed by nitrate or salicylate and (2) displacement of target anions with salicylate followed by dilute hydrochloric acid. The methodology offers an improved regeneration efficiency, recovery, and waste minimization over the conventional displacement technique using sodium chloride (or a brine) or alkali metal hydroxide.

  6. DOE's Office of Science Sets up Program to Aid Scientists Displaced by

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

    Hurricane Katrina | Department of Energy Sets up Program to Aid Scientists Displaced by Hurricane Katrina DOE's Office of Science Sets up Program to Aid Scientists Displaced by Hurricane Katrina September 9, 2005 - 10:08am Addthis WASHINGTON, DC -- The Department of Energy's (DOE) Office of Science has established a program to assist scientists displaced by the effects of Hurricane Katrina. "Our colleagues in science have historically been a close-knit, generous community," wrote

  7. Cryogenic target formation using cold gas jets

    DOE Patents [OSTI]

    Hendricks, Charles D. [Livermore, CA

    1980-02-26

    A method and apparatus using cold gas jets for producing a substantially uniform layer of cryogenic materials on the inner surface of hollow spherical members having one or more layers, such as inertially imploded targets. By vaporizing and quickly refreezing cryogenic materials contained within a hollow spherical member, a uniform layer of the materials is formed on an inner surface of the spherical member. Basically the method involves directing cold gas jets onto a spherical member having one or more layers or shells and containing the cryogenic material, such as a deuterium-tritium (DT) mixture, to freeze the contained material, momentarily heating the spherical member so as to vaporize the contained material, and quickly refreezing the thus vaporized material forming a uniform layer of cryogenic material on an inner surface of the spherical member.

  8. Palladium metallurgy and cold fusion; Some remarks

    SciTech Connect (OSTI)

    Murr, L.E. )

    1990-04-01

    In this paper the recent confusion surrounding claims for the observation of cold fusion involving palladium electrodes in electrochemical cells containing deuterium might be clarified to some extent if the palladium metallurgy, particularly in the context of fundamental microstructures, are accurately defined. Both the palladium/hydrogen and palladium/deuterium systems have been extensively investigated, and it is asserted more than two decades ago that the palladium/hydrogen system was perhaps the most extensively, experimentally investigated metal/gas system. Ordinary hydrogen absorbed in palladium fused to form helium, while in the 1940's Wilner actually observed the fusion reaction at the center of the current cold fusion controversy: d + d {yields} {sup 3}He + n (where d = {sup 2}H represents a deuteron, and n is a neutron). In the experiment by Wilner, a deuterium-saturated palladium sheet was bombarded with accelerated deuterons. The product neutrons (n) were slowed by paraffin wax and detected by the activation of silver.

  9. Cryogenic target formation using cold gas jets

    DOE Patents [OSTI]

    Hendricks, Charles D. (Livermore, CA)

    1981-01-01

    A method and apparatus using cold gas jets for producing a substantially uniform layer of cryogenic materials on the inner surface of hollow spherical members having one or more layers, such as inertially imploded targets. By vaporizing and quickly refreezing cryogenic materials contained within a hollow spherical member, a uniform layer of the materials is formed on an inner surface of the spherical member. Basically the method involves directing cold gas jets onto a spherical member having one or more layers or shells and containing the cryogenic material, such as a deuterium-tritium (DT) mixture, to freeze the contained material, momentarily heating the spherical member so as to vaporize the contained material, and quickly refreezing the thus vaporized material forming a uniform layer of cryogenic material on an inner surface of the spherical member.

  10. Cryogenic target formation using cold gas jets

    DOE Patents [OSTI]

    Hendricks, C.D.

    1980-02-26

    A method and apparatus using cold gas jets for producing a substantially uniform layer of cryogenic materials on the inner surface of hollow spherical members having one or more layers, such as inertially imploded targets are disclosed. By vaporizing and quickly refreezing cryogenic materials contained within a hollow spherical member, a uniform layer of the materials is formed on an inner surface of the spherical member. Basically the method involves directing cold gas jets onto a spherical member having one or more layers or shells and containing the cryogenic material, such as a deuterium-tritium (DT) mixture, to freeze the contained material, momentarily heating the spherical member so as to vaporize the contained material, and quickly refreezing the thus vaporized material forming a uniform layer of cryogenic material on an inner surface of the spherical member. 4 figs.

  11. Adiabatic theory for anisotropic cold molecule collisions

    SciTech Connect (OSTI)

    Pawlak, Mariusz; Shagam, Yuval; Narevicius, Edvardas; Moiseyev, Nimrod

    2015-08-21

    We developed an adiabatic theory for cold anisotropic collisions between slow atoms and cold molecules. It enables us to investigate the importance of the couplings between the projection states of the rotational motion of the atom about the molecular axis of the diatom. We tested our theory using the recent results from the Penning ionization reaction experiment {sup 4}He(1s2s {sup 3}S) + HD(1s{sup 2}) → {sup 4}He(1s{sup 2}) + HD{sup +}(1s) + e{sup −} [Lavert-Ofir et al., Nat. Chem. 6, 332 (2014)] and demonstrated that the couplings have strong effect on positions of shape resonances. The theory we derived provides cross sections which are in a very good agreement with the experimental findings.

  12. Experiments of one-point cold fusion

    SciTech Connect (OSTI)

    Matsumoto, Takaaki )

    1993-11-01

    Experiments of one-point cold fusion have been performed by electrical discharging in ordinary and heavy water mixed with 0.6 mol/l potassium carbonate. A platinum pin anode was located perpendicular to a copper plate cathode. After discharge, the surfaces of the copper plates were examined by an optical microscope. Many ring spots caused by gravity decay of single and di-neutrons were separately distributed on the plates. Furthermore, several kinds of traces that might be produced by itonic hydrogen clusters and by tiny black and white holes were observed. The mechanisms of cold fusion by electrical discharge are also discussed in terms of the Nattoh model. 13 refs., 12 figs.

  13. Cold fusion catalyzed by muons and electrons

    SciTech Connect (OSTI)

    Kulsrud, R.M.

    1990-10-01

    Two alternative methods have been suggested to produce fusion power at low temperature. The first, muon catalyzed fusion or MCF, uses muons to spontaneously catalyze fusion through the muon mesomolecule formation. Unfortunately, this method fails to generate enough fusion energy to supply the muons, by a factor of about ten. The physics of MCF is discussed, and a possible approach to increasing the number of MCF fusions generated by each muon is mentioned. The second method, which has become known as Cold Fusion,'' involves catalysis by electrons in electrolytic cells. The physics of this process, if it exists, is more mysterious than MCF. However, it now appears to be an artifact, the claims for its reality resting largely on experimental errors occurring in rather delicate experiments. However, a very low level of such fusion claimed by Jones may be real. Experiments in cold fusion will also be discussed.

  14. Freeze-In dark matter with displaced signatures at colliders

    SciTech Connect (OSTI)

    Co, Raymond T.; D’Eramo, Francesco; Hall, Lawrence J.; Pappadopulo, Duccio

    2015-12-11

    Dark matter, X, may be generated by new physics at the TeV scale during an early matter-dominated (MD) era that ends at temperature T{sub R}≪ TeV. Compared to the conventional radiation-dominated (RD) results, yields from both Freeze-Out and Freeze-In processes are greatly suppressed by dilution from entropy production, making Freeze-Out less plausible while allowing successful Freeze-In with a much larger coupling strength. Freeze-In is typically dominated by the decay of a particle B of the thermal bath, B→X. For a large fraction of the relevant cosmological parameter space, the decay rate required to produce the observed dark matter abundance leads to displaced signals at LHC and future colliders, for any m{sub X} in the range keV displaced decays, h-tilde→ha-tilde, Za-tilde and h-tilde{sup ±}→W{sup ±}a-tilde. The scale of axion physics, f, is predicted to be in the range (3×10{sup 8}−10{sup 12}) GeV and, over much of this range, can be extracted from the decay length.

  15. Cold Vacuum Drying Facility hazard analysis report

    SciTech Connect (OSTI)

    Krahn, D.E.

    1998-02-23

    This report describes the methodology used in conducting the Cold Vacuum Drying Facility (CVDF) hazard analysis to support the CVDF phase 2 safety analysis report (SAR), and documents the results. The hazard analysis was performed in accordance with DOE-STD-3009-94, Preparation Guide for US Department of Energy Nonreactor Nuclear Facility Safety Analysis Reports, and implements the requirements of US Department of Energy (DOE) Order 5480.23, Nuclear Safety Analysis Reports.

  16. Combined cold compressor/ejector helium refrigerator

    DOE Patents [OSTI]

    Brown, Donald P.

    1985-01-01

    A refrigeration apparatus having an ejector operatively connected with a cold compressor to form a two-stage pumping system. This pumping system is used to lower the pressure, and thereby the temperature of a bath of boiling refrigerant (helium). The apparatus as thus arranged and operated has substantially improved operating efficiency when compared to other processes or arrangements for achieving a similar low pressure.

  17. Supercharger for Heat Pumps in Cold Climates

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

    Supercharger for Heat Pumps in Cold Climates Thomas J. Walter Mechanical Solutions, Inc. tjw@mechsol.com 518-320-8552 April 3, 2013 DOE SBIR Grant No. SC0006162 Concept is similar to superchargers for piston engine aircraft 2 | Building Technologies Office eere.energy.gov Purpose & Objectives Problem Statement: Electrically driven heat pumps are an effective method of extracting heat from ambient air. As air temperature falls, however, heat pump performance falls off, essentially limiting

  18. Cold worked ferritic alloys and components

    DOE Patents [OSTI]

    Korenko, Michael K.

    1984-01-01

    This invention relates to liquid metal fast breeder reactor and steam generator precipitation hardening fully ferritic alloy components which have a microstructure substantially free of the primary precipitation hardening phase while having cells or arrays of dislocations of varying population densities. It also relates to the process by which these components are produced, which entails solution treating the alloy followed by a final cold working step. In this condition, the first significant precipitation hardening of the component occurs during high temperature use.

  19. Possible ways to achieve cold fusion. III

    SciTech Connect (OSTI)

    Tisenko, Yu.A.

    1994-12-01

    It is suggested that a deuteron {open_quotes}microaccelerator{close_quotes} be constructed in order to achieve cold fusion. This accelerator would operate on the basis of a glow discharge near a charged Pd-D powder grain in low-density gaseous D{sub 2}. Possible parameters of such an accelerator are calculated. The heat released as a result of fusion is estimated, as is the intensity of the deuteron flux.

  20. EPRI News; Update on cold fusion

    SciTech Connect (OSTI)

    Douglas, J.

    1991-05-01

    This paper reports that from instant sensation to virtual pariah, cold fusion has had a stormy history since two University of Utah researchers first announced its discovery in March 1989. Research into this mysterious phenomenon has been plagued both by technical difficulties in replicating experimental results and by sometimes bitter controversy over scientific standards and personal credibility. Now, in a somewhat calmer atmosphere, significant progress is being made through experiments that are reproducible over long periods of time and under a variety of conditions. These experiments indicate that nuclear reactions may indeed occur at room temperature in a crystal lattice in ways not understood before. It's time we stopped calling these reactions cold fusion, says David Worledge, EPRI coordinator of research in this area. There is now good evidence that cold nuclear reaction of some sort are taking place, but also growing indications that they aren't conventional deuterium-deuterium fusion, as first assumed. Also, the cold nuclear reactions inferred from the neutrons that have been detected are not numerous enough to be responsible for the excess heat production still being reported in some experiments. In their original work, University of Utah scientist Martin Fleischmann and Stanley Pons used a simple laboratory apparatus consisting of a palladium rod surrounded by a platinum coil and immersed in heavy water. They reported that when a small electric current was applied to the cells, deuterium nuclei from the heavy water were driven into the palladium rod, where they were held in the metal lattice and apparently fused, producing 4 watts of heat for each watt of electric power supplied.

  1. Review of the `cold fusion` effect

    SciTech Connect (OSTI)

    Storms, E.

    1996-09-01

    More than 190 studies reporting evidence for the `cold fusion` effect are evaluated. New work has answered criticisms by eliminating many of the suggested errors. Evidence for large and reproducible energy generation as well as various nuclear reactions, in addition to fusion, from a variety of environments and methods in accumulating. The field can no longer be dismissed by invoking obvious error or prosaic explanations. 192 refs., 12 figs., 10 tabs.

  2. Possible resonant mechanism of cold fusion

    SciTech Connect (OSTI)

    Zakowicz, W. )

    1991-01-01

    This paper discusses a hypothesis of resonant deuteron-deuteron interaction under cold fusion conditions. The resonance may exist due to a combination of an attractive nuclear interaction at close distances and a repulsive Coulomb potential at large distances. The energy of such resonances may be very low. This effect may increase the reaction cross section and reaction rates in high-density deuteron hydrides.

  3. Combined cold compressor/ejector helium refrigerator

    DOE Patents [OSTI]

    Brown, D.P.

    1984-06-05

    A refrigeration apparatus having an ejector operatively connected with a cold compressor to form a two-stage pumping system. This pumping system is used to lower the pressure, and thereby the temperature of a bath of boiling refrigerant (helium). The apparatus as thus arranged and operated has substantially improved operating efficiency when compared to other processes or arrangements for achieving a similar low pressure.

  4. Vehicle Technologies Office Merit Review 2015: Fuel Displacement Potential of Advanced Technologies under Different Thermal Conditions

    Broader source: Energy.gov [DOE]

    Presentation given by Argonne National Laboratory at 2015 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Office Annual Merit Review and Peer Evaluation Meeting about fuel displacement...

  5. Cold moderator test facilities working group

    SciTech Connect (OSTI)

    Bauer, Guenter S.; Lucas, A. T.

    1997-09-01

    The working group meeting was chaired by Bauer and Lucas.Testing is a vital part of any cold source development project. This applies to specific physics concept verification, benchmarking in conjunction with computer modeling and engineering testing to confirm the functional viability of a proposed system. Irradiation testing of materials will always be needed to continuously extend a comprehensive and reliable information database. An ever increasing worldwide effort to enhance the performance of reactor and accelerator based neutron sources, coupled with the complexity and rising cost of building new generation facilities, gives a new dimension to cold source development and testing programs. A stronger focus is now being placed on the fine-tuning of cold source design to maximize its effectiveness in fully exploiting the facility. In this context, pulsed spallation neutron sources pose an extra challenge due to requirements regarding pulse width and shape which result from a large variety of different instrument concepts. The working group reviewed these requirements in terms of their consequences on the needs for testing equipment and compiled a list of existing and proposed facilities suitable to carry out the necessary development work.

  6. Kink modes and surface currents associated with vertical displacement events

    SciTech Connect (OSTI)

    Manickam, Janardhan; Boozer, Allen; Gerhardt, Stefan

    2012-08-15

    The fast termination phase of a vertical displacement event (VDE) in a tokamak is modeled as a sequence of shrinking equilibria, where the core current profile remains constant so that the safety-factor at the axis, q{sub axis}, remains fixed and the q{sub edge} systematically decreases. At some point, the n = 1 kink mode is destabilized. Kink modes distort the magnetic field lines outside the plasma, and surface currents are required to nullify the normal component of the B-field at the plasma boundary and maintain equilibrium at finite pressure. If the plasma touches a conductor, the current can be transferred to the conductor, and may be measurable by the halo current monitors. This report describes a practical method to model the plasma as it evolves during a VDE, and determine the surface currents, needed to maintain equilibrium. The main results are that the onset conditions for the disruption are that the growth-rate of the n = 1 kink exceeds half the Alfven time and the associated surface current needed to maintain equilibrium exceeds one half of the core plasma current. This occurs when q{sub edge} drops below a low integer, usually 2. Application to NSTX provides favorable comparison with non-axisymmetric halo-current measurements. The model is also applied to ITER and shows that the 2/1 mode is projected to be the most likely cause of the final disruption.

  7. DOE Publishes Revised Report on Dimming LEDs with Phase-Cut Dimmers

    Broader source: Energy.gov [DOE]

    DOE has revised its October 2013 report, Dimming LEDs with Phase-Cut Dimmers: The Specifier's Process for Maximizing Success, to include updated information about the installation of LED lighting...

  8. DOE Publishes Technical Brief Clarifying Misconceptions about Safety of LED Lighting

    Broader source: Energy.gov [DOE]

    The spectral emission of LEDs is a frequent subject of concern, so to set the record straight, the U.S. Department of Energy has published a technical brief entitled True Colors: LEDs and the...

  9. Zimbabwe-Terms of Reference for Future LEDS | Open Energy Information

    Open Energy Info (EERE)

    (Redirected from CDKN-Zimbabwe-Terms of Reference for Future LEDS) Jump to: navigation, search Name Zimbabwe-Terms of Reference for Future LEDS AgencyCompany Organization Climate...

  10. DOE Publishes CALiPER Snapshot Report on LED A Lamps

    Broader source: Energy.gov [DOE]

    DOE's CALiPER program has released a Snapshot Report on LED A lamps, which utilizes the LED Lighting Facts program's extensive product database to help industry stakeholders understand the current state and trajectory of the market for that class

  11. File:(2010)2 full paper with cover LEDS FINAL (2).pdf | Open...

    Open Energy Info (EERE)

    (2010)2 full paper with cover LEDS FINAL (2).pdf Jump to: navigation, search File File history File usage File:(2010)2 full paper with cover LEDS FINAL (2).pdf Size of this...

  12. Intel Led OpenMP Training Session at NERSC This Wednesday March...

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

    Led OpenMP Training Session at NERSC This Wednesday March 25 Intel Led OpenMP Training Session at NERSC This Wednesday March 25 March 24, 2015 by Katie Antypas This Wednesday, ...

  13. Team led by PPPL's Chang receives DOE 2015 INCITE award totaling...

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

    Team led by PPPL's Chang receives DOE 2015 INCITE award totaling 270 million core hours to ... Center for Edge Physics Simulation (EPSI), led by C.S. Chang, a physicist at the U.S. ...

  14. Report 20.5: Chromaticity Shift Modes of LED PAR38 Lamps Operated...

    Energy Savers [EERE]

    5: Chromaticity Shift Modes of LED PAR38 Lamps Operated in Steady-State Conditions Report 20.5: Chromaticity Shift Modes of LED PAR38 Lamps Operated in Steady-State Conditions PDF ...

  15. Two PPPL-led teams win increased supercomputing time to study...

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

    Two PPPL-led teams win increased supercomputing time to study conditions inside fusion ... Researchers led by scientists at the U.S. Department of Energy's (DOE) Princeton Plasma ...

  16. New GATEWAY Report Monitors LED System Performance in a High-Temperature Environment

    Broader source: Energy.gov [DOE]

    The U.S. Department of Energy has released a follow-up GATEWAY report on LED system performance at the Yuma (Arizona) Sector Border Patrol Area. Six LED luminaires – installed on three poles as...

  17. DOE Publishes CALiPER Report on the Photoelectric Performance of LED MR16 Lamps

    Broader source: Energy.gov [DOE]

    The U.S. Department of Energy's CALiPER program has released Report 22.1, which is part of a series of investigations on LED MR16 lamps. Report 22 investigated the photometric performance of 27 LED...

  18. Lumileds Develops Patterned Sapphire Substrate Technology for High-Power LEDs

    Broader source: Energy.gov [DOE]

    Patterned sapphire substrate (PSS) technology is an effective approach to improving efficacy and reducing cost of LEDs and has gained wide use in mid-power LEDs. With the help of DOE funding,...

  19. Webinar: The L Prize-Winning LED A19 Replacement-What Commercial...

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

    The L Prize-Winning LED A19 Replacement-What Commercial Building OwnersOperators Can Expect in 2012 Webinar: The L Prize-Winning LED A19 Replacement-What Commercial Building ...

  20. Mexico-EC-LEDS in the Agriculture Sector | Open Energy Information

    Open Energy Info (EERE)

    EC-LEDS in the Agriculture Sector Jump to: navigation, search Name Mexico-EC-LEDS in the Agriculture Sector AgencyCompany Organization United States Department of Agriculture,...

  1. Demonstration Assessment of Light Emitting Diode (LED) Street Lighting, Phase III Continuation

    SciTech Connect (OSTI)

    Cook, Tyson; Shackelford, Jordan; Johnson, Megan; Pang, Terrance

    2008-11-01

    This report summarizes the third phase of an LED street lighting assessment project in Oakland, California, conducted to study the applicability of LED luminaires in a street lighting application.

  2. Text-Alternative Version: Successful Selection of LED Streetlight Luminaires Webcast

    Broader source: Energy.gov [DOE]

    Below is the text-alternative version of the "Successful Selection of LED Streetlight Luminaires" webcast, held March 6, 2013.

  3. CALiPER Benchmark Report: Performance of Halogen Incandescent MR16 Lamps and LED Replacement

    SciTech Connect (OSTI)

    Paget, M. L.; Lingard, R. D.; Myer, M. A.

    2008-11-01

    This benchmark report addresses the halogen MR16 lamp and its commercially available light-emitting diode (LED) replacements.

  4. Assessment of LED Technology in Ornamental Post-Top Luminaires. Sacramento, CA

    SciTech Connect (OSTI)

    Tuenge, J. R.; Bryan, M. M.; Bisbee, D. A.

    2011-12-01

    GATEWAY program report on a demonstration of LED ornamental post-top luminaires in a residential part of Sacramento, CA.

  5. Technical Feasibility Assessment of LED Roadway Lighting on the Golden Gate Bridge

    SciTech Connect (OSTI)

    Tuenge, J. R.

    2012-09-01

    GATEWAY program report on the technical feasibility of LED roadway lighting on the Golden Gate Bridge in San Francisco, CA.

  6. The City of Los Angeles LED Streetlight Program | Department of Energy

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

    Information Resources » Videos » The City of Los Angeles LED Streetlight Program The City of Los Angeles LED Streetlight Program View the video about the Los Angeles LED streetlight program, featuring an interview with City of Los Angeles Bureau of Street Lighting Director, Ed Ebrahimian. View the text-alternative version. Solid-State Lighting Home About the Solid-State Lighting Program Research & Development SSL Basics Using LEDs Information Resources Conferences & Meetings

  7. Demonstration of LED Retrofit Lamps at the Smithsonian Art Museum, Washington, DC

    SciTech Connect (OSTI)

    Miller, N. J.; Rosenfeld, S. M.

    2012-06-01

    GATEWAY program report on a demonstration of LED retrofit lamps at the Smithsonian American Art Museum in Washington, DC.

  8. WEBINAR: LED LIGHTING IN A PERFORMING ARTS BUILDING | Department of Energy

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

    WEBINAR: LED LIGHTING IN A PERFORMING ARTS BUILDING WEBINAR: LED LIGHTING IN A PERFORMING ARTS BUILDING Can LEDs render skin tones and makeup accurately in a dressing room? Can they provide the vertical footcandles in a studio to make dancers' bodies visible, or deliver acting studio lighting to bring out facial expressions and body movements? Can LEDs deliver adequate flicker-free light in the Scene Shop, where students are using saws and other construction tools? And, can they compete with

  9. Text-Alternative Version: Model Specification for LED Roadway Luminaires Webcast

    Broader source: Energy.gov [DOE]

    Below is the text-alternative version of the "Model Specification for LED Roadway Luminaires" webcast, held November 15, 2011.

  10. Use of Occupancy Sensors in LED Parking Lot and Garage Applications: Early Experiences

    SciTech Connect (OSTI)

    Kinzey, B. R.; Myer, M. A.; Royer, M. P.; Sullivan, G. P.

    2012-10-01

    Final GATEWAY program report on the early experiences of using occupancy sensors in LED parking lot and garage applications.

  11. Vietnam-EC-LEDS in the Agriculture Sector | Open Energy Information

    Open Energy Info (EERE)

    Sector Climate, Land Focus Area Agriculture, Economic Development, Greenhouse Gas, Land Use Topics Adaptation, Implementation, Low emission development planning, -LEDS,...

  12. Costa Rica-EC-LEDS in the Agriculture Sector | Open Energy Information

    Open Energy Info (EERE)

    Sector Climate, Land Focus Area Agriculture, Economic Development, Greenhouse Gas, Land Use Topics Adaptation, Implementation, Low emission development planning, -LEDS,...

  13. Kenya-EC-LEDS in the Agriculture Sector | Open Energy Information

    Open Energy Info (EERE)

    Sector Climate, Land Focus Area Agriculture, Economic Development, Greenhouse Gas, Land Use Topics Adaptation, Implementation, Low emission development planning, -LEDS,...

  14. Alkaline assisted thermal oil recovery: Kinetic and displacement studies

    SciTech Connect (OSTI)

    Saneie, S.; Yortsos, Y.C.

    1993-06-01

    This report deals with two major issues of chemical assisted flooding - the interaction of caustic, one of the proposed additives to steam flood, with the reservoir rock, and the displacement of oil by a chemical flood at elevated temperatures. A mathematical model simulating the kinetics of silica dissolution and hydroxyl ion consumption in a typical alkaline flooding environment is first developed. The model is based on the premise that dissolution occurs via hydrolysis of active sites through the formation of an intermediate complex, which is in equilibrium with the silicic acid in solution. Both static (batch) and dynamic (core flood) processes are simulated to examine the sensitivity of caustic consumption and silica dissolution to process parameters, and to determine rates of propagation of pH values. The model presented provides a quantitative description of the quartz-alkali interaction in terms of pH, salinity, ion exchange properties, temperature and contact time, which are of significant importance in the design of soluble silicate flooding processes. The modeling of an adiabatic hot waterflood assisted by the simultaneous injection of a chemical additive is next presented. The model is also applicable to the hot alkaline flooding under conditions of negligible adsorption of the generated anionic surfactant and of hydroxide adsorption being Langmuirian. The theory of generalized simple waves (coherence ) is used to develop solutions for the temperature, concentration, and oil saturation profiles, as well as the oil recovery curves. It is shown that, for Langmuir adsorption kinetics, the chemical resides in the heated region of the reservoir if its injection concentration is below a critical value, and in the unheated region if its concentration exceeds this critical value. Results for a chemical slug injection in a tertiary recovery process indicate recovery performance is maximized when chemical resides in the heated region of the reservior.

  15. Axions as hot and cold dark matter

    SciTech Connect (OSTI)

    Jeong, Kwang Sik; Kawasaki, Masahiro; Takahashi, Fuminobu E-mail: kawasaki@icrr.u-tokyo.ac.jp

    2014-02-01

    The presence of a hot dark matter component has been hinted at 3? by a combination of the results from different cosmological observations. We examine a possibility that pseudo Nambu-Goldstone bosons account for both hot and cold dark matter components. We show that the QCD axions can do the job for the axion decay constant f{sub a}?

  16. High Efficiency Cold Climate Heat Pump

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

    Cold Climate Heat Pump 2016 Building Technologies Office Peer Review Bo Shen, shenb@ornl.gov Oak Ridge National Laboratory 2 Project Summary Timeline: Start date: 01-Oct-2010 Planned end date: May-Sep-2017 Key Milestones 1. Tandem fixed-speed system: Meet 76% capacity at-13°F vs. 47°F; COP=4.2 at 47°F - March/2014. 2. Tandem vapor injection system: Meet 88% capacity at-13°F vs. 47°F; COP=4.4 at 47°F - June/2015. 3. Field investigation of a prototype CCHP: eliminate auxiliary heat down to

  17. Methanation process utilizing split cold gas recycle

    DOE Patents [OSTI]

    Tajbl, Daniel G.; Lee, Bernard S.; Schora, Jr., Frank C.; Lam, Henry W.

    1976-07-06

    In the methanation of feed gas comprising carbon monoxide and hydrogen in multiple stages, the feed gas, cold recycle gas and hot product gas is mixed in such proportions that the mixture is at a temperature sufficiently high to avoid carbonyl formation and to initiate the reaction and, so that upon complete reaction of the carbon monoxide and hydrogen, an excessive adiabatic temperature will not be reached. Catalyst damage by high or low temperatures is thereby avoided with a process that utilizes extraordinarily low recycle ratios and a minimum of investment in operating costs.

  18. Hadronization measurements in cold nuclear matter

    SciTech Connect (OSTI)

    Dupre, Raphael

    2015-05-01

    Hadronization is the non-perturbative process of QCD by which partons become hadrons. It has been studied at high energies through various processes, we focus here on the experiments of lepto-production of hadrons in cold nuclear matter. By studying the dependence of observables to the atomic number of the target, these experimentscan give information on the dynamic of the hadronization at the femtometer scale. In particular, we will present preliminary results from JLab Hall B (CLAS collaboration), which give unprecedented statistical precision. Then, we will present results of a phenomenological study showing how HERMES data can be described with pure energyloss models.

  19. Barrier Distributions for Cold-Fusion Reactions

    SciTech Connect (OSTI)

    Ikezoe, Hiroshi; Mitsuoka, Shin-ichi; Nishio, Katsuhisa; Tsuruta, Kaoru; Watanabe, Yutaka; Jeong, Sunchan; Satou, Ken-ichiro

    2006-08-14

    Coulomb barrier distributions for the capture process in the cold fusion reactions for 48Ti, 54Cr, 56Fe, 64Ni, 70Zn projectiles incident on 208Pb target are obtained by the measurement of the quasi-elastic scattering cross sections at backward angles. The obtained barrier distributions are compared with the result of a coupled-channels calculation. It is found that the barrier distributions are well reproduced by the calculation taking account of the coupling of one phonon of the quadrupole vibration for these projectile nuclei and two phonons of the octupole vibration for 208Pb.

  20. EERE Success Story-LED Lighting in the Classroom for Energy Efficiency

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

    and Enhanced Learning | Department of Energy LED Lighting in the Classroom for Energy Efficiency and Enhanced Learning EERE Success Story-LED Lighting in the Classroom for Energy Efficiency and Enhanced Learning July 21, 2016 - 12:00pm Addthis EERE Success Story—LED Lighting in the Classroom for Energy Efficiency and Enhanced Learning EERE Success Story—LED Lighting in the Classroom for Energy Efficiency and Enhanced Learning EERE Success Story-LED Lighting in the Classroom for