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


1

LEDs  

NLE Websites -- All DOE Office Websites (Extended Search)

Biomedical devices from ultraviolet Biomedical devices from ultraviolet LEDs February 24, 2012 LEDs produce light in the ultraviolet range A process for creating glass-based, inorganic light-emitting diodes (LEDs) that produce light in the ultraviolet range has been developed by a multinational team of scientists. The work, reported in the online Nature Communications, is a step toward biomedical devices with active components made from nanostructured systems. Solution-processed inorganic nanocrystals hold promise LEDs based on solution-processed inorganic nanocrystals have promise for use in environmental and biomedical diagnostics because they are cheap to produce, - 2 - robust, and chemically stable. But development has been hampered by the difficulty of achieving ultraviolet emission. In their paper, LANL's Sergio Brovelli and a research team lead by Alberto Paleari at the

2

LED Lighting  

Energy.gov (U.S. Department of Energy (DOE))

Light-emitting diodes (LEDs) are light sources that differ from more traditional sources of light in that they are semiconductor devices that produce light when an electrical current is applied....

3

LED Update  

SciTech Connect

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.

Johnson, Mark L.; Gordon, Kelly L.

2006-09-01T23:59:59.000Z

4

LED lamp  

SciTech Connect

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.

Galvez, Miguel; Grossman, Kenneth; Betts, David

2013-11-12T23:59:59.000Z

5

The Closure of the Ocean Mixed Layer Temperature Budget Using Level-Coordinate Model Fields  

Science Conference Proceedings (OSTI)

Entrainment is an important element of the mixed layer mass, heat, and temperature budgets. Conventional procedures to estimate entrainment heat advection often do not permit the closure of heat and temperature budgets because of inaccuracies in ...

Seung-Bum Kim; Ichiro Fukumori; Tong Lee

2006-06-01T23:59:59.000Z

6

Driving Down HB-LED Costs: Implementation of Process Simulation Tools and Temperature Control Methods of High Yield MOCVD Growth  

SciTech Connect

The overall objective of this multi-faceted program is to develop epitaxial growth systems that meet a goal of 75% (4X) cost reduction in the epitaxy phase of HB-LED manufacture. A 75% reduction in yielded epitaxy cost is necessary in order to achieve the cost goals for widespread penetration of HB-LEDâ??s into back-lighting units (BLU) for LCD panels and ultimately for solid-state lighting (SSL). To do this, the program will address significant improvements in overall equipment Cost of Ownership, or CoO. CoO is a model that includes all costs associated with the epitaxy portion of production. These aspects include cost of yield, capital cost, operational costs, and maintenance costs. We divide the program into three phases where later phases will incorporate the gains of prior phases. Phase one activities are enabling technologies. In collaboration with Sandia National Laboratories we develop a Fluent-compatible chemistry predictive model and a set of mid-infrared and near-ultraviolet pyrometer monitoring tools. Where previously the modeling of the reactor dynamics were studied within FLUENT alone, here, FLUENT and Chemkin are integrated into a comprehensive model of fluid dynamics and the most advanced transport equations developed for Chemkin. Specifically, the Chemkin model offered the key reaction terms for gas-phase nucleation, a key consideration in the optimization of the MOCVD process. This new predictive model is used to design new MOCVD reactors with optimized growth conditions and the newly developed pyrometers are used monitor and control the MOCVD process temperature to within 0.5°C run-to-run and within each wafer. This portion of the grant is in collaboration with partners at Sandia National Laboratories. Phase two activities are continuous improvement projects which extend the current reactor platform along the lines of improved operational efficiency, improved systems control for throughput, and carrier modifications for increased yield. Programmatically, improvements made in Phase I are applied to developments of Phase II when applicable. Phase three is the culmination of the individual tasks from both phases one and two applied to proposed production platforms. We selectively combine previously demonstrated tasks and other options to develop a high-volume production-worthy MOCVD system demonstrating >3x throughput, 1.3x capital efficiency, and 0.7x cost of ownership. In a parallel demonstration we validate the concept of an improved, larger deposition system which utilizes the predictive modeling of chemistry-based flow analysis and extensions of the improvements demonstrated on the current platforms. This validation includes the build and testing of a prototype version of the hardware and demonstration of 69% reduction in the cost of ownership. Also, in this phase we present a stand-alone project to develop a high-temperature system which improves source efficiency by 30% while concurrently increasing growth rate by 1.3x. The material quality is held to the same material quality specifications of our existing baseline processes. The merits of other line item tasks in phase three are discussed for inclusion on next-generation platforms.

William Quinn

2012-04-30T23:59:59.000Z

7

On Equatorial Dynamics, Mixed Layer Physics and Sea Surface Temperature  

Science Conference Proceedings (OSTI)

We describe a new numerical model designed to study the interactions between hydrodynamics and thermodynamics in the upper ocean. The model incorporates both primitive equation dynamics and a parameterization of mixed layer physics. There is a ...

Paul S. Schopf; Mark A. Cane

1983-06-01T23:59:59.000Z

8

Vertical Mixing and the Temperature and Wind Structure of the Tropical Tropopause Layer  

Science Conference Proceedings (OSTI)

We show that vertical mixing can lead to significant momentum and heat fluxes in the tropical tropopause layer (TTL) and that these momentum and heat fluxes can force large climatological temperature and zonal wind changes in the TTL. We present ...

Thomas J. Flannaghan; Stephan Fueglistaler

9

Genesis of Indian Ocean Mixed Layer Temperature Anomalies: A Heat Budget Analysis  

Science Conference Proceedings (OSTI)

The genesis of mixed layer temperature anomalies across the Indian Ocean are analyzed in terms of the underlying heat budget components. Observational data, for which a seasonal budget can be computed, and a climate model output, which provides ...

Agus Santoso; Alexander Sen Gupta; Matthew H. England

2010-10-01T23:59:59.000Z

10

Evaluations of Mesoscale Models' Simulations of Near-Surface Winds, Temperature Gradients, and Mixing Depths  

Science Conference Proceedings (OSTI)

Mesoscale meteorological models are being used to provide inputs of winds, vertical temperature and stability structure, mixing depths, and other parameters to atmospheric transport and dispersion models. An evaluation methodology is suggested ...

Steven R. Hanna; Ruixin Yang

2001-06-01T23:59:59.000Z

11

Bright Idea Illuminates LED Standards  

Science Conference Proceedings (OSTI)

... the pulse measurement results that LED manufacturers use. ... that the optical and electrical characteristics of ... last much longer at lower temperatures. ...

2011-04-25T23:59:59.000Z

12

NON-SOOTING, LOW FLAME TEMPERATURE MIXING-CONTROLLED DI DIESEL COMBUSTION  

DOE Green Energy (OSTI)

Methods of producing non-sooting, low flame temperature diesel combustion were investigated in an optically-accessible, quiescent constant-volume combustion vessel under mixing-controlled diesel combustion conditions. Combustion and soot processes of single, isolated fuel jets were studied after auto-ignition and transient premixed combustion and while the injector was fully-open (i.e. during the mixing-controlled phase of heat release for diesel combustion). The investigation showed that small injector tip orifices could be used to produce non-sooting and low flame temperature combustion simultaneously. The use of small orifices was shown to enable non-sooting and low flame temperature combustion in two different ways as summarized below. A more detailed description of the experimental methods and results is provided in Ref. [1-3]. First, using an injector tip with a 50 micron orifice and ambient oxygen concentrations as low as 10% (simulating the use of extensive EGR), a fuel jet was non-sooting at typical diesel ambient temperatures (1000 K). Second, using the same injector tip at a reduced ambient gas temperature (850 K), but with 21% oxygen, it was shown that non-sooting, mixing-controlled combustion occurred at the lift-off length in a fuel-air mixture with a cross-sectional average equivalence ratio of approximately 0.6-suggesting that the quasi-steady combustion was fuel-lean and thereby avoided the formation of a diffusion flame. The adiabatic flame temperature with reduced ambient oxygen concentration or fuel-lean combustion was approximately 2000 K, compared to typical diesel flame temperatures that exceed 2600 K. The 50 micron orifice results above were obtained using a No.2 diesel fuel. However, using an oxygenated fuel (20 wt% oxygen), the investigation showed that the same low temperature combustion, either with reduced ambient oxygen concentration or fuel-lean combustion, was realized with a 100 micron orifice. Although these single, isolated jets do not have jet-jet interactions that would occur in realistic engines, the results are useful for understanding limiting-case behavior of single-jet mixing and combustion during an injection event. The non-sooting and low flame temperature mixing-controlled combustion realized using small orifice tips suggests that the use of small orifices offers the potential for a simultaneous soot and NOx reduction in an engine, much like diesel HCCI combustion. However, further research is needed to determine whether these methods could be successfully implemented in real engines.

Pickett, L; Siebers, D

2003-08-24T23:59:59.000Z

13

Method for stabilizing low-level mixed wastes at room temperature  

DOE Patents (OSTI)

A method to stabilize solid and liquid waste at room temperature is provided comprising combining solid waste with a starter oxide to obtain a powder, contacting the powder with an acid solution to create a slurry, said acid solution containing the liquid waste, shaping the now-mixed slurry into a predetermined form, and allowing the now-formed slurry to set. The invention also provides for a method to encapsulate and stabilize waste containing cesium comprising combining the waste with Zr(OH).sub.4 to create a solid-phase mixture, mixing phosphoric acid with the solid-phase mixture to create a slurry, subjecting the slurry to pressure; and allowing the now pressurized slurry to set. Lastly, the invention provides for a method to stabilize liquid waste, comprising supplying a powder containing magnesium, sodium and phosphate in predetermined proportions, mixing said powder with the liquid waste, such as tritium, and allowing the resulting slurry to set.

Wagh, Arun S. (Joliet, IL); Singh, Dileep (Westmont, IL)

1997-01-01T23:59:59.000Z

14

Method for stabilizing low-level mixed wastes at room temperature  

DOE Patents (OSTI)

A method to stabilize solid and liquid waste at room temperature is provided comprising combining solid waste with a starter oxide to obtain a powder, contacting the powder with an acid solution to create a slurry, said acid solution containing the liquid waste, shaping the now-mixed slurry into a predetermined form, and allowing the now-formed slurry to set. The invention also provides for a method to encapsulate and stabilize waste containing cesium comprising combining the waste with Zr(OH){sub 4} to create a solid-phase mixture, mixing phosphoric acid with the solid-phase mixture to create a slurry, subjecting the slurry to pressure; and allowing the now pressurized slurry to set. Lastly, the invention provides for a method to stabilize liquid waste, comprising supplying a powder containing magnesium, sodium and phosphate in predetermined proportions, mixing said powder with the liquid waste, such as tritium, and allowing the resulting slurry to set. 4 figs.

Wagh, A.S.; Singh, D.

1997-07-08T23:59:59.000Z

15

Low temperature photochemical vapor deposition of alloy and mixed metal oxide films  

DOE Patents (OSTI)

Method and apparatus for formation of an alloy thin film, or a mixed metal oxide thin film, on a substrate at relatively low temperatures. Precursor vapor(s) containing the desired thin film constituents is positioned adjacent to the substrate and irradiated by light having wavelengths in a selected wavelength range, to dissociate the gas(es) and provide atoms or molecules containing only the desired constituents. These gases then deposit at relatively low temperatures as a thin film on the substrate. The precursor vapor(s) is formed by vaporization of one or more precursor materials, where the vaporization temperature(s) is selected to control the ratio of concentration of metals present in the precursor vapor(s) and/or the total precursor vapor pressure.

Liu, David K. (San Pablo, CA)

1992-01-01T23:59:59.000Z

16

High temperature vitrification of surrogate Savannah River Site (SRS) mixed waste materials  

Science Conference Proceedings (OSTI)

The Savannah River Technology Center (SRTC) has been funded through the DOE Office of Technology Development (DOE-OTD) to investigate high-temperature vitrification technologies for the treatment of diverse low-level and mixed wastes. High temperature vitrification is a likely candidate for processing heterogeneous solid wastes containing low levels of activity. Many SRS wastes fit into this category. Plasma torch technology is one high temperature vitrification method. A trial demonstration of plasma torch processing is being performed at the Georgia Institute of Technology on surrogate SRS wastes. This effort is in cooperation with the Engineering Research and Development Association of Georgia Universities (ERDA) program. The results of phase 1 of these plasma torch trials will be presented.

Applewhite-Ramsey, A.; Schumacher, R.F.; Spatz, T.L. [Westinghouse Savannah River Co., Aiken, SC (United States); Newsom, R.A.; Circeo, L.J. [Georgia Inst. of Technology, Atlanta, GA (United States); Danjaji, M.B. [Clark Atlanta Univ., Atlanta, GA (United States)

1995-11-01T23:59:59.000Z

17

Nd:YAG single-crystal fiber laser: Room-temperature cw operation using a single LED as an end pump  

SciTech Connect

cw laser action has been obtained using as-grown single-crystal Nd:YAG fibers end-pumped by a single high-radiance LED. The fibers were 0.5 cm long and 80 ..mu..m in dia; the diameter of the LED luminous area was 85 ..mu..m. The lowest cw laser threshold was observed at a diode drive current of 45 mA. (AIP)

Stone, J.; Burrus, C.A.; Dentai, A.G.; Miller, B.I.

1976-07-01T23:59:59.000Z

18

Parameterization of Joint Frequency Distributions of Potential Temperature and Water Vapor Mixing Ratio in the Daytime Convective Boundary Layer  

Science Conference Proceedings (OSTI)

Joint frequency distributions (JFDs) of potential temperature (?) versus water vapor mixing ratio (r) within the convective boundary layer were measured during a new field experiment named Boundary Layer Experiment 1996 (BLX96). These JFDs were ...

Larry K. Berg; Roland B. Stull

2004-04-01T23:59:59.000Z

19

Assimilating AIRS Temperature and Mixing Ratio Profiles Using an Ensemble Kalman Filter Approach for Convective-Scale Forecasts  

Science Conference Proceedings (OSTI)

One satellite data product that has received great interest in the numerical weather prediction community is the temperature and mixing ratio profiles derived from the Atmospheric Infrared Sounder (AIRS) instrument on board the Aqua satellite. ...

Thomas A. Jones; David J. Stensrud

2012-06-01T23:59:59.000Z

20

LED ProspectsLED Prospects photometric units  

E-Print Network (OSTI)

for Standardization. #12;1602 8 "kW" means kilowatt. "kWh" means kilowatt-hour. "Light emitting diode (LED)" means a p, material used, and exciting current of the device. The output of a light-emitting diode may be in: (1

Pulfrey, David L.

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


21

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

Open Energy Info (EERE)

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

22

Culture-led regeneration.  

E-Print Network (OSTI)

???Culture-led regeneration policy has become a global trend in many major cities worldwide (UNCHS, 2004; Miles and Paddison, 2005). While overseas governments such as the… (more)

???.

2012-01-01T23:59:59.000Z

23

Values-led business.  

E-Print Network (OSTI)

?? The issue that is dealt with in this paper is the concept of values-led business. The idea behind the term is that businesses has… (more)

Nyberg, Andreas; Borgh, Anders

2005-01-01T23:59:59.000Z

24

Sistemi di illuminazione LED.  

E-Print Network (OSTI)

??Lo scopo di questa tesina č di analizzare le principali proprietŕ dei recenti sistemi di illuminazione a LED a luce bianca, quali struttura, caratteristiche elettriche… (more)

Carraro, Simone

2010-01-01T23:59:59.000Z

25

Two stage, low temperature, catalyzed fluidized bed incineration with in situ neutralization for radioactive mixed wastes  

Science Conference Proceedings (OSTI)

A two stage, low temperature, catalyzed fluidized bed incineration process is proving successful at incinerating hazardous wastes containing nuclear material. The process operates at 550{degrees}C and 650{degrees}C in its two stages. Acid gas neutralization takes place in situ using sodium carbonate as a sorbent in the first stage bed. The feed material to the incinerator is hazardous waste-as defined by the Resource Conservation and Recovery Act-mixed with radioactive materials. The radioactive materials are plutonium, uranium, and americium that are byproducts of nuclear weapons production. Despite its low temperature operation, this system successfully destroyed poly-chlorinated biphenyls at a 99.99992% destruction and removal efficiency. Radionuclides and volatile heavy metals leave the fluidized beds and enter the air pollution control system in minimal amounts. Recently collected modeling and experimental data show the process minimizes dioxin and furan production. The report also discusses air pollution, ash solidification, and other data collected from pilot- and demonstration-scale testing. The testing took place at Rocky Flats Environmental Technology Site, a US Department of Energy facility, in the 1970s, 1980s, and 1990s.

Wade, J.F.; Williams, P.M.

1995-05-17T23:59:59.000Z

26

Development and characterization of a high CRI LED lamp.  

E-Print Network (OSTI)

??The aim of this thesis is to realize a high CRI LED lamp using the color mixing technique. We start from a high efficiency white… (more)

Meneghesso , Matteo

2012-01-01T23:59:59.000Z

27

Wind Mixing and Restratification in a Lake near the Temperature of Maximum Density  

Science Conference Proceedings (OSTI)

The cooling of a freshwater take provides an opportunity for studying wind mixing and restratification under the peculiar conditions associated with a density maximum. The concepts are explored using a mixing-layer model that incorporates both ...

David M. Farmer; Eddy Carmack

1981-11-01T23:59:59.000Z

28

Explanation for the temperature dependence of plasma frequencies in SrTiO{sub 3} using mixed-polaron theory  

SciTech Connect

A theory of mixed polarons is used to interpret the published experimental results of Gervais {ital et} {ital al}. on temperature-dependent plasma frequencies in Nb-doped SrTiO{sub 3}. For given polaron masses before mixing, the appropriate average mixed-polaron mass at any temperature {ital T} depends on two quantities, {delta} and {ital b}, which are measures of the separation between the bottoms of large and nearly small polaron bands before mixing and of a mixing matrix element; {delta} and {ital b} are assumed to have arbitrary linear dependences on {ital T}, probably related to a {ital T} dependence of the bare mass, and a term quadratic in {ital T} is included in {delta}, determined from the {ital T} dependence of large-polaron binding energies. Including a constraint on the ratio {delta}/{vert_bar}{ital b}{vert_bar} at low {ital T} from known masses from specific-heat data, satisfactory agreement is obtained with masses determined from plasma frequencies. This gives further support for the theory of mixed polarons in SrTiO{sub 3} in addition to that already published. {copyright} {ital 1996 The American Physical Society.}

Eagles, D.M.; Georgiev, M. [Institute of Solid State Physics, Bulgarian Academy of Sciences, 72, Tzarigradsko Chaussee Boulevard, 1784 Sofia (Bulgaria)] [Institute of Solid State Physics, Bulgarian Academy of Sciences, 72, Tzarigradsko Chaussee Boulevard, 1784 Sofia (Bulgaria); Petrova, P.C. [Institute of Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences, 72, Tzarigradsko Chaussee Boulevard, 1784 Sofia (Bulgaria)] [Institute of Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences, 72, Tzarigradsko Chaussee Boulevard, 1784 Sofia (Bulgaria)

1996-07-01T23:59:59.000Z

29

Energy Basics: LED Lighting  

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

positivenegative junction of the diode, the electrons slow down to orbit at a lower energy level. The electrons emit the excess energy as photons of light. LEDs are often used...

30

RS-232 Led Board  

E-Print Network (OSTI)

This article demonstrates how to develop a Microchip PIC16F84 based device that supports RS-232 interface with PC. Circuit (LED Board) design and software development will be discussed. PicBasic Pro Compiler from microEngineering Labs, Inc. is used for PIC programming. Development of LED Board Control Console using C/C++ is also briefly discussed. The project requires basic work experience with Microchip PICs, serial communication and programming.

Tskhvaradze, Vladimir

2007-01-01T23:59:59.000Z

31

Prospects for LED lighting.  

SciTech Connect

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.

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

2003-08-01T23:59:59.000Z

32

The LED Block Cipher  

E-Print Network (OSTI)

Abstract. We present a new block cipher LED. While dedicated to compact hardware implementation, and offering the smallest silicon footprint among comparable block ciphers, the cipher has been designed to simultaneously tackle three additional goals. First, we explore the role of an ultra-light (in fact non-existent) key schedule. Second, we consider the resistance of ciphers, and LED in particular, to related-key attacks: we are able to derive simple yet interesting AES-like security proofs for LED regarding related- or single-key attacks. And third, while we provide a block cipher that is very compact in hardware, we aim to maintain a reasonable performance profile for software implementation. Key words: lightweight, block cipher, RFID tag, AES. 1

Jian Guo; Thomas Peyrin; Axel Poschmann; Matt Robshaw

2011-01-01T23:59:59.000Z

33

LED Lightbulbs | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

ledhiresweb.eps Description LED lightbulbs - EPS file. More Documents & Publications LED Lightbulbs CFL Lightbulbs CFL Lightbulbs...

34

LED Lightbulbs | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

ledshires.jpg Description LED lightbulbs More Documents & Publications LED Lightbulbs CFL Lightbulbs Lighting Choices - White Background...

35

Sea Surface Temperatures Computed by a Simple Ocean Mixed Layer Coupled to an Atmospheric GCM  

Science Conference Proceedings (OSTI)

An ocean mixed layer with fixed depth (50 m) is coupled to a global atmospheric general circulation model (GCM). The mixed layer is a simple slab that allows for seasonal heat storage but has no dynamics (advection or diffusion). The an surface ...

Gerald A. Meehl; Warren M. Washington

1985-01-01T23:59:59.000Z

36

EVSE Features Power Limiter Switch LED Power Indicator LED...  

NLE Websites -- All DOE Office Websites (Extended Search)

Limiter Switch LED Power Indicator LED Charge Indicator EVSE Specifications Grid connection Plug and cord NEMA 6-50 Connector type J1772 Test lab certifications UL Listed...

37

Blue LED for RS Monitor  

E-Print Network (OSTI)

Abstract We report on a design of RS gain monitor system based on blue LED. Gain of each RS PMT is monitored by a LED, which is mounted in front of the PMT window in its _-metal shield. The blue LED well simulates scintillation light with its short pulse and wavelength. The LED is as small as 3 mmOE. The light yield is stable and has small temperature dependence. These are nice properties to install in present RS system with small modification and to operate without air conditioning. In this note we will present outline of our design and test results which demonstrate its desirable properties. 1 Introduction RS gain monitor has been carried out with K_2 events at E787. They are sat- isfactory to monitor long and medium term stability but it is not satisfactory to monitor short term stability and to check PMT and related electronics quickly and frequently. These capabilities are important to reduce setup time and loss time in long E949 run. For these purpose triggerable and stable light source is required at RS system. We consider two types of monitoring system. One is the system which consists of one light source and its light distribution network, such as a Xe lamp with a optical fiber network. It has the advantage that light intensity of the source itself can be monitored and be corrected. But, practically, it is not easy to estimate light output of individual fiber correctly by checking light source and to handle optical fibers, and we have to think out a solution how we introduce lights to RS or its PMT. Also the system is rather expensive and it will take long time to

unknown authors

2000-01-01T23:59:59.000Z

38

LEDS | OpenEI Community  

Open Energy Info (EERE)

LEDS Home Graham7781's picture Submitted by Graham7781(2002) Super contributor 16 November, 2012 - 11:23 LEDS the focus of Monday's 10 a.m. Town Hall Meeting LEDS Town Hall meeting...

39

LED Lighting | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

LED Lighting LED Lighting August 16, 2013 - 10:07am Addthis Light-emitting diodes (LEDs) are light sources that differ from more traditional sources of light in that they are...

40

Liquid-gas mixed phase in nuclear matter at finite temperature  

E-Print Network (OSTI)

We explore the geometrical structure of Liquid-gas (LG) mixed phase which is relevant to nuclear matter in the crust region of compact stars or supernovae. To get the equation of state (EOS) of the system, the Maxwell construction is found to be applicable to symmetric nuclear matter, where protons and neutrons behave simultaneously. For asymmetric nuclear matter, on the other hand, the phase equilibrium can be obtained by fully solving the Gibbs conditions since the components in the L and G phases are completely different. We also discuss the effects of surface and the Coulomb interaction on the mixed phase.

Toshiki Maruyama; Toshitaka Tatsumi

2010-09-07T23:59:59.000Z

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


41

LED Lighting | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

LED Lighting LED Lighting LED Lighting July 29, 2012 - 4:43pm Addthis LED Lighting What are the key facts? Quality LED products can last 25 times longer than an incandescent bulb and use 75% less energy. LEDs are directional, 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 technologies. Quality LED light bulbs last longer, are more durable, and offer comparable or better light quality than other types of lighting. Check out the top 8 things about LEDs to learn more. Energy Savings LED is a highly energy efficient lighting technology, and has the potential to fundamentally change the future of lighting in the United States. Residential LEDs -- especially ENERGY STAR rated products -- use at least

42

Effects of Subgrid-Scale Mixing Parameterizations on Simulated Distributions of Natural 14C, Temperature, and Salinity in a Three-Dimensional Ocean General Circulation Model  

Science Conference Proceedings (OSTI)

The effects of parameterizations of subgrid-scale mixing on simulated distributions of natural 14C, temperature, and salinity in a three-dimensional ocean general circulation model are examined. The parameterizations studied are 1) the Gent–...

Philip B. Duffy; Ken Caldeira; Jerry Selvaggi; Martin I. Hoffert

1997-04-01T23:59:59.000Z

43

A New Method to Produce Sea Surface Temperature Using Satellite Data Assimilation into an Atmosphere-Ocean Mixed Layer Coupled Model  

Science Conference Proceedings (OSTI)

A new method of producing sea surface temperature (SST) data for numerical weather prediction is suggested, which is obtained from the assimilation of satellite-derived SST into an atmosphere-ocean mixed layer coupled model. The Weather Research ...

Eunjeong Lee; Yign Noh; Naoki Hirose

44

Anthropogenic Moisture Effects on WRF Summertime Surface Temperature and Mixing Ratio Forecast Skill In Southern California  

Science Conference Proceedings (OSTI)

Mesoscale forecasts for the Los Angeles basin made with the fifth-generation Pennsylvania State University–National Center for Atmospheric Research Mesoscale Model (MM5) exhibited a moderate to substantial warm temperature bias for extended ...

Rich F. Coleman; James F. Drake; Michael D. McAtee; Leslie O. Belsma

2010-10-01T23:59:59.000Z

45

Impact of Combining Temperature Profiles from Different Instruments on an Analysis of Mixed Layer Properties  

Science Conference Proceedings (OSTI)

For a joint analysis of temperature profiles from floats, expendable bathythermographs (XBTs), and other instruments (e.g., thermistor chains) the consistency of the profiles from the different sources needs to be ensured to avoid results with ...

Claudia Schmid

2005-10-01T23:59:59.000Z

46

LED pumped lithium neodymium tetraphosphate lasers  

SciTech Connect

Laser action in lithium neodymium tetraphosphate, LiNdP/sub 4/O/sub 12/ (LNP), crystals, pumped with Al/sub x/Ga/sub 1-x/As electroluminescent diodes, is reported, citing both end- and side-pump configurations. The threshold incident light-emitting diode (LED) intensities at about -30/sup 0/C are 14.9 W/cm/sup 2/ and 7.2 W/cm/sup 2/ for end and side pump, respectively. Temperature dependences of threshold, stimulated emission cross section, and round-trip loss were measured experimentally. Possibility of room-temperature cw operation, maximum output power, and optimum coupling are discussed. Taking account of improvements of pumping optics, crystal homogeneity and LED structure, LED intensities required for room-temperature cw operation are 35 W/cm/sup 2/ and 8.5 W/cm/sup 2/ for end and side pump, respectively.

Saruwatari, M.; Kimura, T.

1976-10-01T23:59:59.000Z

47

White LED with High Package Extraction Efficiency  

Science Conference Proceedings (OSTI)

The goal of this project is to develop a high efficiency phosphor converting (white) Light Emitting Diode (pcLED) 1-Watt package through an increase in package extraction efficiency. A transparent/translucent monolithic phosphor is proposed to replace the powdered phosphor to reduce the scattering caused by phosphor particles. Additionally, a multi-layer thin film selectively reflecting filter is proposed between blue LED die and phosphor layer to recover inward yellow emission. At the end of the project we expect to recycle approximately 50% of the unrecovered backward light in current package construction, and develop a pcLED device with 80 lm/W{sub e} using our technology improvements and commercially available chip/package source. The success of the project will benefit luminous efficacy of white LEDs by increasing package extraction efficiency. In most phosphor-converting white LEDs, the white color is obtained by combining a blue LED die (or chip) with a powdered phosphor layer. The phosphor partially absorbs the blue light from the LED die and converts it into a broad green-yellow emission. The mixture of the transmitted blue light and green-yellow light emerging gives white light. There are two major drawbacks for current pcLEDs in terms of package extraction efficiency. The first is light scattering caused by phosphor particles. When the blue photons from the chip strike the phosphor particles, some blue light will be scattered by phosphor particles. Converted yellow emission photons are also scattered. A portion of scattered light is in the backward direction toward the die. The amount of this backward light varies and depends in part on the particle size of phosphors. The other drawback is that yellow emission from phosphor powders is isotropic. Although some backward light can be recovered by the reflector in current LED packages, there is still a portion of backward light that will be absorbed inside the package and further converted to heat. Heat generated in the package may cause a deterioration of encapsulant materials, affecting the performance of both the LED die and phosphor, leading to a decrease in the luminous efficacy over lifetime. Recent studies from research groups at Rensselaer Polytechnic Institute found that, under the condition to obtain a white light, about 40% of the light is transmitted outward of the phosphor layer and 60% of the light is reflected inward.1,2 It is claimed that using scattered photon extraction (SPE) technique, luminous efficacy is increased by 60%. In this project, a transparent/translucent monolithic phosphor was used to replace the powdered phosphor layer. In the normal pcLED package, the powdered phosphor is mixed with silicone either to be deposited on the top of LED die forming a chip level conversion (CLC) white LED or to be casted in the package forming a volume conversion white LED. In the monolithic phosphors there are no phosphor powder/silicone interfaces so it can reduce the light scattering caused by phosphor particles. Additionally, a multi-layer thin film selectively reflecting filter is inserted in the white LED package between the blue LED die and phosphor layer. It will selectively transmit the blue light from the LED die and reflect the phosphor's yellow inward emission outward. The two technologies try to recover backward light to the outward direction in the pcLED package thereby improving the package extraction efficiency.

Yi Zheng; Matthew Stough

2008-09-30T23:59:59.000Z

48

100 LPW 800 Lm Warm White LED  

Science Conference Proceedings (OSTI)

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 Lumiramicâ?˘ 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 efficiency (PPE) through improvement in phosphor-package interactions. Another achievement in the development of the phosphor integration technology is the demonstration of tight color control. The high power WW LED product developed has been proven to have good reliability. The manufacturing of the product will be done in Philips Lumiledsâ?? LUXEON Rebel production line which has produced billions of high power LEDs. The first high power WW LED product will be released to the market in 2011.

Decai Sun

2010-10-31T23:59:59.000Z

49

The solar LED street light.  

E-Print Network (OSTI)

??The purpose of this essay is to analyze the component of the solar LED street lighting, such as structure, principle, characteristics and precautions for installation… (more)

Ma, Hao

2013-01-01T23:59:59.000Z

50

Advanced Leds | Open Energy Information  

Open Energy Info (EERE)

Leds Leds Jump to: navigation, search Name Advanced Leds Place Coventry, England, United Kingdom Zip CV5 6SP Product Advanced Leds develops LED technology for outdoor lighting, including street lighting applications. Coordinates 44.866737°, -72.263927° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":44.866737,"lon":-72.263927,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

51

Metacapacitors for LED Lighting: Metacapacitors  

Science Conference Proceedings (OSTI)

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.

None

2010-09-02T23:59:59.000Z

52

Biomedical devices from ultraviolet LEDs  

NLE Websites -- All DOE Office Websites (Extended Search)

Biomedical devices from ultraviolet LEDs Biomedical devices from ultraviolet LEDs Light-emitting nanocrystal diodes go ultraviolet Biomedical devices with active components could be made from nanostructured systems. February 24, 2012 Researcher working with nanocrystals A researcher at LANL works with nanocrystals. Get Expertise Researcher Sergio Brovelli Physical Chem & Applied Spectroscopy Email Research Team Leader Alberto Paleari University of Milano-Bicocca in Italy Such devices could, for example, selectively activate light-sensitive drugs for better medical treatment or probe for the presence of fluorescent markers in medical diagnostics. LEDs produce light in the ultraviolet range A process for creating glass-based, inorganic light-emitting diodes (LEDs) that produce light in the ultraviolet range has been developed by a

53

Fritz Morgan: LEDs into gold  

Science Conference Proceedings (OSTI)

Fritz Morgen researches and designs LED-based lighting systems for theatrical, architectural, retail, and other clients for Color Kinetics Inc. in Boston. He works with top theatrical designers and architects all over the world to create novel lighting ...

S. Cherry

2005-02-01T23:59:59.000Z

54

OpenEI Community - LEDS  

Open Energy Info (EERE)

LEDS the focus of Monday's 10 a.m. Town Hall Meeting http:en.openei.orgcommunityblogleds-focus-mondays-10-am-town-hall-meeting

 

55

Solid-State Lighting: Using LEDs  

NLE Websites -- All DOE Office Websites (Extended Search)

Using LEDs to someone by E-mail Using LEDs to someone by E-mail Share Solid-State Lighting: Using LEDs on Facebook Tweet about Solid-State Lighting: Using LEDs on Twitter Bookmark Solid-State Lighting: Using LEDs on Google Bookmark Solid-State Lighting: Using LEDs on Delicious Rank Solid-State Lighting: Using LEDs on Digg Find More places to share Solid-State Lighting: Using LEDs on AddThis.com... Why SSL LED Basics OLED Basics Using LEDs R&D Challenges Market Challenges Using LEDs Resources Using LEDs to Their Best Advantage PDF Establishing LED Equivalency PDF LED Directional Lamps LED MR16 Lamps Recessed LED Downlights PDF General Service LED Lamps What to Ask - A Checklist for Buyers of LED Lighting Products More Resources With their unique design and performance characteristics-such as directional light emission, compact profile, superior optical control,

56

Mixing and flame structures inferred from OH-PLIF for conventional and low-temperature diesel engine combustion  

SciTech Connect

The structure of first- and second-stage combustion is investigated in a heavy-duty, single-cylinder optical engine using chemiluminescence imaging, Mie-scatter imaging of liquid-fuel, and OH planar laser-induced fluorescence (OH-PLIF) along with calculations of fluorescence quenching. Three different diesel combustion modes are studied: conventional non-diluted high-temperature combustion (HTC) with either (1) short or (2) long ignition delay, and (3) highly diluted low-temperature combustion (LTC) with early fuel injection. For the short ignition delay HTC condition, the OH fluorescence images show that second-stage combustion occurs mainly on the fuel jet periphery in a thickness of about 1 mm. For the long ignition delay HTC condition, the second-stage combustion zone on the jet periphery is thicker (5-6 mm). For the early-injection LTC condition, the second-stage combustion is even thicker (20-25 mm) and occurs only in the down-stream regions of the jet. The relationship between OH concentration and OH-PLIF intensity over a range of equivalence ratios is estimated from quenching calculations using collider species concentrations predicted by chemical kinetics simulations of combustion. The calculations show that both OH concentration and OH-PLIF intensity peak near stoichiometric mixtures and fall by an order of magnitude or more for equivalence ratios less than 0.2-0.4 and greater than 1.4-1.6. Using the OH fluorescence quenching predictions together with OH-PLIF images, quantitative boundaries for mixing are established for the three engine combustion modes. (author)

Singh, Satbir [General Motors Research and Development, Warren, MI 48090 (United States); Musculus, Mark P.B. [Sandia National Laboratories, Livermore, CA 94551 (United States); Reitz, Rolf D. [Department of Mechanical Engineering, University of Wisconsin, Madison, WI 53706 (United States)

2009-10-15T23:59:59.000Z

57

Building Energy Software Tools Directory: Evergreen LED  

NLE Websites -- All DOE Office Websites (Extended Search)

Tools by Platform PC Mac UNIX Internet Tools by Country Related Links Evergreen LED Evergreen LED logo Evergreen LED has developed a unique energy savings calculator...

58

A Practical Primer to LED Technology  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

2011 LED Transformations, LLC 1 LED Lighting: A Practical Overview DOE Project Management Workshop March 15, 2011 Dr. John W. Curran, President, LED Transformations, LLC On behalf...

59

Building Energy Software Tools Directory: Evergreen LED  

NLE Websites -- All DOE Office Websites (Extended Search)

Evergreen LED Evergreen LED logo Evergreen LED has developed a unique energy savings calculator software tool to precisely calculate the energy savings, carbon savings, cost...

60

LedEngin Inc | Open Energy Information  

Open Energy Info (EERE)

Name LedEngin, Inc Place Santa Clara, California Zip 95054 Product Developer of Light Emitting Diode (LED) technology for medical and portable applications. References LedEngin,...

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


61

Integrated LED-based luminare for general lighting  

DOE Patents (OSTI)

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.

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

2013-03-05T23:59:59.000Z

62

New and Underutilized Technology: High Bay LED Lighting | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

High Bay LED Lighting High Bay LED Lighting New and Underutilized Technology: High Bay LED Lighting October 7, 2013 - 8:55am Addthis The following information outlines key deployment considerations for high bay LED lighting within the Federal sector. Benefits LED light sources offer several potential benefits compared to metal halide or fluorescent lighting, including reduced energy consumption due to the ability to provide a more precise light distribution; longer operating life and lower maintenance requirements; less heat introduced into the space; and greater controllability for dimming and on/off control. Relevant to the cold storage application, LED performance improves in colder temperatures. Application High bay LED lighting is applicable for facilities containing high bay

63

Multicolor, High Efficiency, Nanotextured LEDs  

SciTech Connect

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.

Jung Han; Arto Nurmikko

2011-09-30T23:59:59.000Z

64

LED lamp color control system and method  

DOE Patents (OSTI)

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.

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

2013-02-05T23:59:59.000Z

65

LED lamp power management system and method  

DOE Patents (OSTI)

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.

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

2013-03-19T23:59:59.000Z

66

Optimized Phosphors for Warm White LED Light Engines  

Science Conference Proceedings (OSTI)

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.

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

2012-07-30T23:59:59.000Z

67

Solid-State Lighting: LED Lighting Facts  

NLE Websites -- All DOE Office Websites (Extended Search)

Market-Based Programs Printable Version Share this resource Send a link to Solid-State Lighting: LED Lighting Facts to someone by E-mail Share Solid-State Lighting: LED Lighting Facts on Facebook Tweet about Solid-State Lighting: LED Lighting Facts on Twitter Bookmark Solid-State Lighting: LED Lighting Facts on Google Bookmark Solid-State Lighting: LED Lighting Facts on Delicious Rank Solid-State Lighting: LED Lighting Facts on Digg Find More places to share Solid-State Lighting: LED Lighting Facts on AddThis.com... LED Lighting Facts CALiPER Program Standards Development Technical Information Network Gateway Demonstrations Municipal Consortium Design Competitions LED Lighting Facts LED lighting facts - A Program of the U.S. DOE DOE's LED Lighting Facts® program showcases LED products for general

68

Light Emitting Diode (LED) Lighting and Systems  

Science Conference Proceedings (OSTI)

This EPRI Technical Update addresses the most promising and unique energy efficient light source light emitting diode (LED) lighting. Business and technical market factors (Chapter 2) explain the upcoming growth of the LED and LED lighting market. Future technical improvements to LEDs and systems are also emphasized. Discussion of the importance of utility involvement in helping their customers make the switch from traditional lighting to LED lighting is provided. LED lighting technologies are covered in...

2007-12-21T23:59:59.000Z

69

Commercial Lighting and LED Lighting Incentives  

Energy.gov (U.S. Department of Energy (DOE))

Incentives for energy efficient commercial lighting equipment as well as commercial LED lighting equipment are available to businesses under the Efficiency Vermont Lighting and LED Lighting...

70

Resonant Power MOSFET Driver for LED Lighting.  

E-Print Network (OSTI)

??LED lighting has a promising future in consumer markets. Many researchers have conducted researches to improve the LED driver efficiencies. In this thesis, a computer… (more)

Tuladhar, Looja R.

2009-01-01T23:59:59.000Z

71

Experimental study of layer mixing, relative ionic escape velocity, and electron temperature gradients in spherical multilayered targets by XUV spectroscopy  

SciTech Connect

This past year we have undertaken experiments at the University of Rochester's Laboratory for Laser Energetics investigating layer mixing and expansion velocities of spherical targets uniformly irradiated by high intensity laser light. We performed high resolution spectroscopic measurements of spherical plasmas, produced using the Omega laser, and have observed enhanced broadening of XUV emission lines due to the expansion velocities.

Griem, H.R.

1990-07-01T23:59:59.000Z

72

The lattice QCD simulation of the quark-gluon mixed condensate g at finite temperature and the phase transition of QCD  

E-Print Network (OSTI)

The thermal effects on the quark-gluon mixed condensate g, which is another chiral order parameter, are studied using the SU(3)c lattice QCD with the Kogut-Susskind fermion at the quenched level. We perform the accurate measurement of the mixed condensate as well as the quark condensate for 0MeVcondensates around T_c \\simeq 280MeV, while the thermal effects below T_c are found to be weak. We also find that the ratio m_0^2 = g/ is almost independent of the temperature even in the very vicinity of T_c, which indicates that the two condensates have nontrivial similarity in the chiral behaviors. We also present the correlation between the condensates and the Polyakov loop to understand the vacuum structure of QCD.

Takumi Doi; Noriyoshi Ishii; Makoto Oka; Hideo Suganuma

2004-09-14T23:59:59.000Z

73

A Practical Primer to LED Technology  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

2011 LED Transformations, LLC 2011 LED Transformations, LLC 1 LED Lighting: A Practical Overview DOE Project Management Workshop March 15, 2011 Dr. John W. Curran, President, LED Transformations, LLC On behalf of the U.S. Department of Energy ©2011 LED Transformations, LLC 2 Learning Objectives LED Lighting: A Practical Overview 1. Critical differences between SSL and other lighting technologies 2. Understanding the effect of thermal management on product lifetime 3. How to distinguish good from poor SSL products and applications Residence, Kapalua, HI ©2011 LED Transformations, LLC 3 Copyright Materials This presentation is protected by US and International copyright laws. Reproduction, distribution, display and use of the presentation without

74

Mixing it up - Measuring diffusion in supercooled liquid solutions of methanol and ethanol at temperatures near the glass transition  

DOE Green Energy (OSTI)

Do liquid mixtures, cooled to temperatures below their freezing point, behave as normal liquids? We address this question using nanoscale films of methanol and ethanol supercooled liquid solutions of varying composition (7 -93% methanol) at temperatures near their glass transition,Tg. The permeation of Kr through these films is used to determine the diffusivities of the supercooled liquid mixtures. We find that the temperature dependent diffusivities of the mixtures are well-fit by a Vogel-Fulcher-Tamman equation indicating that the mixtures exhibit fragile behavior at temperatures just above their Tg. Further, for a given temperature, the composition dependent diffusivity is well-fit by a Vignes-type equation, i.e. the diffusivity of any mixture can be predicted using an exponential weighting of the diffusion of the pure methanol and ethanol diffusivities. These results show that deeply supercooled liquid mixtures can be used to provide valuable insight into the properties of normal liquid mixtures.

Matthiesen, Jesper; Smith, R. Scott; Kay, Bruce D.

2011-03-17T23:59:59.000Z

75

LED Chips and Packaging for 120 LPW SSL Component  

SciTech Connect

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) â?? 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.

James Ibbetson

2009-09-30T23:59:59.000Z

76

LED Green Power Inc | Open Energy Information  

Open Energy Info (EERE)

Login | Sign Up Search Page Edit with form History Facebook icon Twitter icon LED Green Power Inc Jump to: navigation, search Name LED Green Power Inc Place Santa Cruz,...

77

Solid-State Lighting: LED Basics  

NLE Websites -- All DOE Office Websites (Extended Search)

SSL Basics Printable Version Share this resource Send a link to Solid-State Lighting: LED Basics to someone by E-mail Share Solid-State Lighting: LED Basics on Facebook Tweet...

78

Decisions that led to Y-12  

NLE Websites -- All DOE Office Websites (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...

79

LED Exit Signs | Open Energy Information  

Open Energy Info (EERE)

LED Exit Signs Jump to: navigation, search TODO: Add description List of LED Exit Signs Incentives Retrieved from "http:en.openei.orgwindex.php?titleLEDExitSigns&oldid38062...

80

LED end-pumped Nd:YAG lasers  

SciTech Connect

Experimental results are reported on the room-temperature operation of Nd:YAG lasers end pumped with an LED. The radiation from a 10% efficient 0.46 mm-dia domed LED was coupled to the end of a 0.46-mm-diam x 5.0-mm-long laser rod with a large hemispherical reflector. At 20/sup 0/C, a multimode laser power of 0.25 mW was obtained at an LED current of 250 mA. By measuring the variation of threshold pump power with rod temperature and the laser power versus pump power just above threshold, both the laser cavity loss and the output mirror transmission were determined. A round-trip cavity loss as low as 0.022% was measured. A calculation of the fractional pump power absorbed in the rod for the LED spectrum gave 56% for a 5-mm-long rod while measurements showed that 30 to 35% of the LED power was being absorbed indicating an LED-to-laser rod coupling efficiency of 54 to 63% for this arrangement. With such efficient absorption of pump power and low cavity loss, end-pumped Nd:YAG lasers with high slope efficiencies above threshold are possible.

Ostermayer, F.W. Jr.

1977-01-01T23:59:59.000Z

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


81

EC-LEDS Transport | Open Energy Information  

Open Energy Info (EERE)

EC-LEDS Transport EC-LEDS Transport Jump to: navigation, search Name EC-LEDS Transport Agency/Company /Organization United States Department of State Partner National Renewable Energy Laboratory Sector Climate Focus Area Transportation Topics Background analysis, Baseline projection, Co-benefits assessment, Finance, GHG inventory, Implementation, Low emission development planning, -LEDS, Policies/deployment programs Program Start 2011 Country Global References Transportation Assessment Toolkit[1] "Enhancing Capacity for Low Emission Development Strategies (EC-LEDS) is a U.S. Government initiative to support developing countries' efforts to pursue long-term, transformative development and accelerate sustainable, climate-resilient economic growth while slowing the growth of greenhouse

82

LED Lighting Basics | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

LED Lighting Basics LED Lighting Basics LED Lighting Basics August 16, 2013 - 10:07am Addthis Light-emitting diodes (LEDs) are light sources that differ from more traditional sources of light in that they are semiconductor devices that produce light when an electrical current is applied. Applying electrical current causes electrons to flow from the positive side of a diode to the negative side. Then, at the positive/negative junction of the diode, the electrons slow down to orbit at a lower energy level. The electrons emit the excess energy as photons of light. LEDs are often used as small indicator lights on various electronic devices. Because of their long life, durability, and efficiency, LEDs are becoming more common in residential, commercial, and outdoor area lighting

83

Minimal Achievable Error in the LED problem  

E-Print Network (OSTI)

This paper presents a theoretical model to predict the minimal achievable error, given a noise ratio #, in the LED data set problem. The motivation for developing this theoretical model is to understand and explain some of the results that di#erent systems achieve when they solve the LED problem. Moreover, given a new learning algorithm that solves the LED problem, we can now bound its optimal generalization accuracy.

Xavier Llora; Xavier Llora; David E. Goldberg; David E. Goldberg

2002-01-01T23:59:59.000Z

84

LED Street and Area Lighting Technologies  

Science Conference Proceedings (OSTI)

Light emitting diodes (LEDs) are being used for applications beyond just indicator lights. One of those applications, street and area lighting, is of considerable interest. This interest is generated by potential reductions that can be achieved in operating costs resulting from lower maintenance costs as well as potentially lower electricity costs that result from the higher efficiency of LED lamps in the systems, the capability to dim and control LED systems, and better light quality. This white paper l...

2008-07-09T23:59:59.000Z

85

Core/Shell Nanophosphors for LED Lighting  

Science Conference Proceedings (OSTI)

Symposium, Symposium H: Advanced Ceramics. Presentation Title, Core/Shell Nanophosphors for LED Lighting. Author(s), Jinkyu Han, Gustavo Hirata, Jan B ...

86

New Fabrication Technique Yields Nanoscale UV LEDs  

Science Conference Proceedings (OSTI)

... Contact: Michael E. Newman 301-975-3025. [Top] Micrograph of a complete nanowire LED with the end contact. The long ...

2012-06-05T23:59:59.000Z

87

Low Emission Development Strategies (LEDS): Technical, Institutional...  

Open Energy Info (EERE)

Summary Name: Low Emission Development Strategies (LEDS): Technical, Institutional and Policy Lessons AgencyCompany Organization: Organisation for Economic Co-Operation and...

88

High Bandgap Phosphide Approaches for LED Applications ...  

Light emitting diodes (LEDs) ... The U.S. Department of Energy expects to phase out tungsten bulbs by 2014, and compact fluorescents by 2020, ...

89

Information Resources: LED Essentials - Technology, Applications...  

NLE Websites -- All DOE Office Websites (Extended Search)

Innovation for Philips Solid-State Lighting Solutions, presented a broad introduction to LED technology, and discussed the technology status, advantages and disadvantages, current...

90

Proprietŕ illuminotecniche delle lampade a LED.  

E-Print Network (OSTI)

??La tesi espone le motivazioni che fanno ritenere i Led una sorgente luminosa piů vantaggiosa rispetto alle tradizionali lampade, fornendo allo stesso tempo tutte le… (more)

Zarpellon, Cristopher

2010-01-01T23:59:59.000Z

91

Information Resources: Successful Selection of LED Streetlight...  

NLE Websites -- All DOE Office Websites (Extended Search)

Successful Selection of LED Streetlight Luminaires: Optimizing Illumination and Economic Performance This March 6, 2013 webcast reviewed the factors involved in successful...

92

Efficient Driver for Dimmable White LED Lighting.  

E-Print Network (OSTI)

??A high efficiency driver circuit is proposed for Light Emitting Diode (LED) lamps with dimming feature. The current regulation is accomplished by processing partial power… (more)

Yang, Wen-ching

2011-01-01T23:59:59.000Z

93

Investigation on Operating Characteristics of RGB LEDs.  

E-Print Network (OSTI)

??This thesis seeks to gain a better understanding on operating characteristics of the three primary color light emitting diode (LED). By applying direct, pulse and… (more)

Liao, Chi-nan

2007-01-01T23:59:59.000Z

94

One-Particle Spectral Function and Local Density of States in a Phenomenological Mixed-Phase Model for High-Temperature Superconductors  

SciTech Connect

The dynamical properties of a recently introduced phenomenological model for high-temperature superconductors are investigated. In the clean limit, it was observed that none of the homogeneous or striped states that are induced by the model at low temperatures can reproduce the recent angle-resolved photoemission results for La{sub 2-x}Sr{sub x}CuO{sub 4} [Yoshida et al., Phys. Rev. Lett. 91, 027001 (2003)], which show a signal with two branches in the underdoped regime. On the other hand, upon including quenched disorder in the model and breaking the homogeneous state into 'patches' that are locally either superconducting or antiferromagnetic, the two-branch spectra can be reproduced. In this picture, the nodal regions are caused by d-wave superconducting clusters. Studying the density of states (DOS), a pseudogap is observed, caused by the mixture of the gapped antiferromagnetic state and a d-wave superconductor. The local DOS can be interpreted using a mixed-phase picture, similar to what is observed in tunneling experiments. It is concluded that a simple phenomenological model for cuprates can capture several of the one-particle features observed in the underdoped regime of these materials.

Mayr, Matthias [Max-Planck-Institut fur Feskorperforschung, Stuttgart, Germany; Alvarez, Gonzalo [ORNL; Moreo, Adriana [ORNL; Dagotto, Elbio R [ORNL

2006-01-01T23:59:59.000Z

95

Today LED Holiday Lights, Tomorrow the World?  

SciTech Connect

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.

Gordon, Kelly L.

2004-12-20T23:59:59.000Z

96

Very high radiance edge-emitting LED  

SciTech Connect

A new light-emitting diode (LED) whose radiance is 1000 W/cm/sup 2/sr, an order of magnitude higher than any previous LED, is described. The LED is an (AlGa)As double-heterojunction edge-emitting structure. This structure acts as a waveguide for the internally generated light, and with appropriate Al concentration difference at the heterojunctions (..delta..x approximately equal to 0.3) and active region width (approximately 500 A), the radiation pattern perpendicular to the junction can be less than 30/sup 0/ (FWHM). For fiber-optic communications this LED is capable of coupling 850 ..mu..w, at a coupling loss of only -10 dB into a 0.14-numerical-aperture (NA), 90-..mu..m-diam low-loss fiber. The LED is capable of being directly modulated at 250 MHz and has a spectral width of less than 300 A.

Ettenberg, M.; Kressel, H.; Wittke, J.P.

1976-06-01T23:59:59.000Z

97

High Performance Green LEDs by Homoepitaxial  

SciTech Connect

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.

Wetzel, Christian; Schubert, E Fred

2009-11-22T23:59:59.000Z

98

An LED pulser for measuring photomultiplier linearity  

E-Print Network (OSTI)

A light-emitting diode (LED) pulser for testing the low-rate response of a photomultiplier tube (PMT) to scintillator-like pulses has been designed, developed, and implemented. This pulser is intended to simulate 80 ns full width at half maximum photon pulses over the dynamic range of the PMT, in order to precisely determine PMT linearity. This particular design has the advantage that, unlike many LED test rigs, it does not require the use of multiple calibrated LEDs, making it insensitive to LED gain drifts. Instead, a finite-difference measurement is made using two LEDs which need not be calibrated with respect to one another. These measurements give a better than 1% mapping of the response function, allowing for the testing and development of particularly linear PMT bases.

Friend, M; Quinn, B

2011-01-01T23:59:59.000Z

99

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

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

for LEDs: LED Lighting Video Series Explains the 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 Program Director, Building Technologies Office How can I participate? Learn more about the advantages and accessiblity of LED lighting from this series of videos. If you haven't been down the lighting aisle of your favorite home improvement store lately, you may be surprised at how many LED lighting products have arrived. Solid-state lighting (LEDs are one type) will soon have a strong impact on how buildings and homes are lit, in part because of its potential to reduce U.S. lighting energy usage by nearly one half.

100

Highly Efficient Small Form Factor LED Retrofit Lamp  

SciTech Connect

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.

Steven Allen; Fred Palmer; Ming Li

2011-09-11T23:59:59.000Z

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


101

High Power UV LED Industrial Curing Systems  

Science Conference Proceedings (OSTI)

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.

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

2012-05-14T23:59:59.000Z

102

LEDS Events Calendar | Open Energy Information  

Open Energy Info (EERE)

source source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Page Edit History Facebook icon Twitter icon » LEDS Events Calendar Jump to: navigation, search Home | About | Inventory | Partnerships | Capacity Building | Webinars | Reports | Events | News | List Serve LEDS Events Calendar January 2014 Today January February March April May June July August September October November December 2014 Go to month Sunday Monday Tuesday Wednesday Thursday Friday Saturday 29 30 31 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 1 Add an Event Upcoming LEDS Events Retrieved from "http://en.openei.org/w/index.php?title=LEDS_Events_Calendar&oldid=384765" What links here Related changes

103

SunLed Technologies | Open Energy Information  

Open Energy Info (EERE)

SunLed Technologies SunLed Technologies Jump to: navigation, search Name SunLed Technologies Place Hyderabad, Andhra Pradesh, India Zip 500 034 Sector Solar Product Hyderabad-based end-to-end energy efficient lighting solution provider and ESCO focused on LEDs and solar power. Coordinates 17.6726°, 77.5971° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":17.6726,"lon":77.5971,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

104

SemiLEDs | Open Energy Information  

Open Energy Info (EERE)

SemiLEDs SemiLEDs Jump to: navigation, search Name SemiLEDs Place Boise, Idaho Zip 83702 Product US-based LED chip maker with Asia manufacturing operations. Coordinates 43.60698°, -116.193409° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":43.60698,"lon":-116.193409,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

105

Information Resources: LED Replacement Lamps: Current Performance...  

NLE Websites -- All DOE Office Websites (Extended Search)

incandescent lamps (e.g., A-lamps), and provided an update on ENERGY STAR criteria for LED integral replacement lamps - currently in its second draft. Robert Lingard of Pacific...

106

Eutricity Eu-Max ADR LED System  

NLE Websites -- All DOE Office Websites (Extended Search)

Eutricity Eu-Max ADR LED System Speaker(s): Brent Marsh Date: September 13, 2013 - 12:00pm - 1:00pm Location: 90-3122 Seminar HostPoint of Contact: Francis Rubinstein Eutricity...

107

Final decisions that led to Y-12  

NLE Websites -- All DOE Office Websites (Extended Search)

decisions that led to Y-12 As we have seen earlier in this series, Ernest O. Lawrence and his University of California Radiation Lab in Berkeley was the center for research using...

108

All inorganic colloidal quantum dot LEDs  

E-Print Network (OSTI)

This thesis presents the first colloidal quantum dot light emitting devices (QD-LEDs) with metal oxide charge transport layers. Colloidally synthesized quantum dots (QDs) have shown promise as the active material in ...

Wood, Vanessa Claire

2007-01-01T23:59:59.000Z

109

LED Exit Signs Tech Sheet Final Version  

NLE Websites -- All DOE Office Websites (Extended Search)

SAVE ENERGY, MONEY AND PREVENT POLLUTION WITH LIGHT-EMITTING DIODE (LED) EXIT SIGNS Illuminated exit signs are an important and legally required safety feature in your facility. In...

110

A Practical Primer to LED Technology | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

A Practical Primer to LED Technology A Practical Primer to LED Technology A Practical Primer to LED Technology More Documents & Publications EnergySavingsLightEmittingDiodesNi...

111

LEDS Tier I Activities | Open Energy Information  

Open Energy Info (EERE)

Tier I Activities Tier I Activities Jump to: navigation, search Name LEDS Tier I Activities Agency/Company /Organization United States Department of State, United States Department of Agriculture Partner Multiple Ministries of Agriculture Sector Climate, Land Focus Area Agriculture, Land Use Topics Co-benefits assessment, Low emission development planning, -LEDS Website http://transition.usaid.gov/ou Program Start 2011 Program End 2014 Country Costa Rica, Kenya Central America, Eastern Africa References Enhancing Capacity for Low Emission Development Strategies Program[1] Overview "Enhancing Capacity for Low Emission Development Strategies (EC-LEDS) is a U.S. Government initiative to support developing countries' efforts to pursue long-term, transformative development and accelerate sustainable,

112

A LED Flasher for TUNKA experiment  

E-Print Network (OSTI)

A LED flasher has been developed for TUNKA-133 EAS Cherenkov detector. A blue ultra bright InGaN LED is used as a light source in the flasher. The flasher's driver is based on a fast discharge of a small capacitor via a complementary pair of fast RF transistors. The light yield of the flasher is adjusted in the wide range of from 0 to up to 10**9 photons per pulse. The results of studies of the flasher's amplitude and timing parameters and their stability are presented.

Lubsandorzhiev, B K; Shaibonov, B A J; Vyatchin, Y E; Zablotsky, A Z

2007-01-01T23:59:59.000Z

113

Available Technologies: Novel Structured LED and OLED Devices  

APPLICATIONS OF TECHNOLOGY: Light Emitting Diode (LED) and Organic LED devices for. Energy-efficient area lighting ; Information displays

114

Novel Structured LED and OLED Devices - Energy Innovation Portal  

Applications and Industries Light Emitting Diode (LED) and Organic LED devices for. Energy-efficient area lighting; Information displays; Technology ...

115

LEDS GP Second Annual Event: Learning and Leading on LEDS Workshop | Open  

Open Energy Info (EERE)

GP Second Annual Event: Learning and Leading on LEDS Workshop GP Second Annual Event: Learning and Leading on LEDS Workshop Jump to: navigation, search LEDSGP Logo.png Advancing climate-resilient low emission development around the world Home About Tools Expert Assistance Events Publications Join Us Calendar.png LEDS GP Second Annual Event: Learning and Leading on LEDS Workshop: on 2013/02/27 (February 27 - March 1, 2013) The LEDS Global Partnership is convening its second annual global workshop to bring together leading practitioners from countries and international institutions to share lessons and strengthen cooperation on low emission development around the world. The workshop will convene peer learning and collaboration sessions on common topics of interest defined by the African Climate & Development Society, Asia LEDS

116

Method of extracting thermally stable optical signals from a GaAlAs LED source  

SciTech Connect

A self-compensating scheme is described that eliminates the need for temperature control devices employed in many LED-based optical test and measurement instruments to ensure optical signal stability. Thermal behavior of GaAlAs LED sources is exploited to provide an optical wavelength band signal with 0.1%/C power level stability.

Murtaza, G.; Senior, J.M. [Manchester Metropolitan Univ. (United Kingdom). Faculty of Science and Engineering

1995-05-01T23:59:59.000Z

117

LED for vei- og gatebelysning; LED for Street and Road Lighting.  

E-Print Network (OSTI)

?? Denne masteroppgaven har som formĺl ĺ finne ut av om LED er egnet til vei- og gatebelysning. Analysen baserer seg pĺ ulike mĺlinger gjort… (more)

Heide, Jřrgen Anker-Rasch

2011-01-01T23:59:59.000Z

118

Low-Cost Illumination-Grade LEDs  

SciTech Connect

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 technology was commercialized in our LUXEON Q product in Sept., 2013. Also, the retention of the sapphire increased the robustness of the device, enabling sales of low-cost submount-free chips to lighting manufacturers. Thus, blue LED die sales were initiated in the form of a PSS-FC in February, 2013.

Epler, John

2013-08-31T23:59:59.000Z

119

Sustainable LED Fluorescent Light Replacement Technology  

SciTech Connect

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 comparable across lifecycle phases, subsystems, and environmental impact category, and can be normalized to a userdefined functional unit. • Drill-down Review – These provide an indepth look at individual lamp designs with the ability to review across subsystem or lifecycle phase.

None

2011-06-30T23:59:59.000Z

120

Category:LEDS Toolkit | Open Energy Information  

Open Energy Info (EERE)

Toolkit Toolkit Jump to: navigation, search This page contains toolkits 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 14 total. A Agriculture Work Space/Tools B Bioenergy Assessment Toolkit Bioenergy Toolkit E Energy System and Scenario Analysis Toolkit F Financing Initiatives Toolkit G Greenhouse Gas Inventory Development Toolkit I Impact Assessment Toolkit L Land Use Assessment Toolkit Land-use Policy and Program Design Toolkit Land-use Scenario Analysis Toolkit M Market Analysis Toolkit P Policy and Program Design Toolkit S Sustainable Land-use Impact Assessment Toolkit T Transportation Assessment Toolkit Retrieved from "http://en.openei.org/w/index.php?title=Category:LEDS_Toolkit&oldid=332209

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


121

White LED with High Package Extraction Efficiency  

Office of Scientific and Technical Information (OSTI)

WHITE LED WITH HIGH PACKAGE WHITE LED WITH HIGH PACKAGE EXTRACTION EFFICIENCY Final Report Report Period Start Date: 10/01/2006 Report Period End Date: 09/30/2008 Authors: Yi Zheng and Matthew Stough Report Submission Date: November 2008 DOE Award Number: DE-FC26-06NT42935 Project Manager: Ryan Egidi OSRAM SYLVANIA Product Inc Central Research and Service Laboratory 71 Cherry Hill Dr., Beverly, MA 01915 2 DISCLAIMER This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor an agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus,

122

West Oahu Solar Powered LED Lighting System  

Science Conference Proceedings (OSTI)

This report describes the design and construction of a solar powered lighting system on the island of Oahu that uses a new Light Emitting Diode (LED) lamp technology. With oil in limited supply and ever increasing energy costs, the construction of photovoltaic (PV) systems has the potential to reduce Hawaiis dependence on imported fossil fuels and help Hawaiian Electric Company (HECO) to meet Hawaiis Renewable Portfolio Standards (RPS).

2006-03-21T23:59:59.000Z

123

PCA9633 4-bit Fm+ I2C-bus LED driver  

E-Print Network (OSTI)

Red/Green/Blue/Amber (RGBA) color mixing applications. Each LED output has its own 8-bit resolution (256 steps) fixed frequency Individual PWM controller that operates at 97 kHz with a duty cycle that is adjustable from 0 % to 99.6 % to allow the LED to be set to a specific brightness value. A fifth 8-bit resolution (256 steps) Group PWM controller has both a fixed frequency of 190 Hz and an adjustable frequency between 24 Hz to once every 10.73 seconds with a duty cycle that is adjustable from 0 % to 99.6 % that is used to either dim or blink all LEDs with the same value. Each LED output can be off, on (no PWM control), set at its Individual PWM controller value or at both Individual and Group PWM controller values. The LED output driver is programmed to be either open-drain with a 25 mA current sink capability at 5 V or totem pole with a 25 mA sink, 10 mA source capability at 5 V. The PCA9633 operates with a supply voltage range of 2.3 V to 5.5 V and the outputs are 5.5 V tolerant. LEDs can be directly connected to the LED output (up to 25 mA, 5.5 V) or controlled with external drivers and a minimum amount of discrete components for larger current or higher voltage LEDs.

unknown authors

2008-01-01T23:59:59.000Z

124

Demonstration of LED Street Lighting in Kansas City, MO  

SciTech Connect

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.

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

2013-06-10T23:59:59.000Z

125

A projective LED dental lamp design.  

E-Print Network (OSTI)

??Halogen lamps are mostly applied as a light source to the traditional lamp for medical treatment due to its proper color temperature, but it has… (more)

Chung, Yu-Lin

2011-01-01T23:59:59.000Z

126

Caratteristiche, qualitŕ e cromaticitŕ della luce a LED. Features, quality and chromaticity of the LED light.  

E-Print Network (OSTI)

??Un LED č un diodo che emette luce monocromatica per l’occhio, la quale, in base alla sensibilitŕ dell’occhio umano, presenta una qualitŕ e una cromaticitŕ… (more)

Rizzato, Vanessa

2013-01-01T23:59:59.000Z

127

LEDS Toolkit and Framework | Open Energy Information  

Open Energy Info (EERE)

LEDS Toolkit and Framework LEDS Toolkit and Framework Jump to: navigation, search Tool Summary LAUNCH TOOL Name: LEDS Toolkit and Methodology Agency/Company /Organization: National Renewable Energy Laboratory Sector: Energy, Land, Water, Climate Topics: Low emission development planning Resource Type: Dataset User Interface: Website, Desktop Application Website: en.openei.org/apps/LEDS/ Cost: Free UN Region: Central Asia, Eastern Asia, South-Eastern Asia, "Pacific" is not in the list of possible values (Eastern Africa, Middle Africa, Northern Africa, Southern Africa, Western Africa, Caribbean, Central America, South America, Northern America, Central Asia, Eastern Asia, Southern Asia, South-Eastern Asia, Western Asia, Eastern Europe, Northern Europe, Southern Europe, Western Europe, Australia and New Zealand, Melanesia, Micronesia, Polynesia, Latin America and the Caribbean) for this property., "Latin America and Caribbean" is not in the list of possible values (Eastern Africa, Middle Africa, Northern Africa, Southern Africa, Western Africa, Caribbean, Central America, South America, Northern America, Central Asia, Eastern Asia, Southern Asia, South-Eastern Asia, Western Asia, Eastern Europe, Northern Europe, Southern Europe, Western Europe, Australia and New Zealand, Melanesia, Micronesia, Polynesia, Latin America and the Caribbean) for this property., "Western Asia & North Africa" is not in the list of possible values (Eastern Africa, Middle Africa, Northern Africa, Southern Africa, Western Africa, Caribbean, Central America, South America, Northern America, Central Asia, Eastern Asia, Southern Asia, South-Eastern Asia, Western Asia, Eastern Europe, Northern Europe, Southern Europe, Western Europe, Australia and New Zealand, Melanesia, Micronesia, Polynesia, Latin America and the Caribbean) for this property., Northern America, "South Asia" is not in the list of possible values (Eastern Africa, Middle Africa, Northern Africa, Southern Africa, Western Africa, Caribbean, Central America, South America, Northern America, Central Asia, Eastern Asia, Southern Asia, South-Eastern Asia, Western Asia, Eastern Europe, Northern Europe, Southern Europe, Western Europe, Australia and New Zealand, Melanesia, Micronesia, Polynesia, Latin America and the Caribbean) for this property., "Sub-Saharan Africa" is not in the list of possible values (Eastern Africa, Middle Africa, Northern Africa, Southern Africa, Western Africa, Caribbean, Central America, South America, Northern America, Central Asia, Eastern Asia, Southern Asia, South-Eastern Asia, Western Asia, Eastern Europe, Northern Europe, Southern Europe, Western Europe, Australia and New Zealand, Melanesia, Micronesia, Polynesia, Latin America and the Caribbean) for this property., "Western & Eastern Europe" is not in the list of possible values (Eastern Africa, Middle Africa, Northern Africa, Southern Africa, Western Africa, Caribbean, Central America, South America, Northern America, Central Asia, Eastern Asia, Southern Asia, South-Eastern Asia, Western Asia, Eastern Europe, Northern Europe, Southern Europe, Western Europe, Australia and New Zealand, Melanesia, Micronesia, Polynesia, Latin America and the Caribbean) for this property.

128

Services-Led Industrialization in India: Assessment and Lessons  

E-Print Network (OSTI)

Issues In India’s Service-Led Growth”, ICRIER Working PaperIndia: A Case of Finance - Led Industrialization? ” JournalSustainability of Services-led Growth: An Input-Output

Singh, Nirvikar

2006-01-01T23:59:59.000Z

129

Measured Off-Grid LED Lighting System Performance  

E-Print Network (OSTI)

Market in Western Kenya: LED Alternatives and Consumerfor Emerging Off-grid White-LED Illumination Systems forReport #4 Measured Off-Grid LED Lighting System Performance

Granderson, Jessica

2009-01-01T23:59:59.000Z

130

LED Traffic Lights Get Buy American Stamp | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

LED Traffic Lights Get Buy American Stamp LED Traffic Lights Get Buy American Stamp November 30, 2010 - 10:19am Addthis Red. Yellow. Green. What LED traffic signals don't say: Made...

131

Solid-State Lighting: Simple Modular LED Cost Model  

NLE Websites -- All DOE Office Websites (Extended Search)

Simple Modular LED Cost Model to someone by E-mail Share Solid-State Lighting: Simple Modular LED Cost Model on Facebook Tweet about Solid-State Lighting: Simple Modular LED Cost...

132

A NEW LED-LED PORTABLE CO2 GAS SENSOR BASED ON AN INTERCHANGEABLE MEMBRANE SYSTEM FOR INDUSTRIAL APPLICATIONS  

E-Print Network (OSTI)

A NEW LED-LED PORTABLE CO2 GAS SENSOR BASED ON AN INTERCHANGEABLE MEMBRANE SYSTEM FOR INDUSTRIAL, consisting of two LEDs wherein one is used as the light source (emitter) and the other is used in reverse bias mode as the light detector. The first configuration uses a green LED as emitter and a red LED

Lee, Hyowon

133

Coolant mixing in LMFBR rod bundles and outlet plenum mixing transients. Progress report, December 1,1978--February 28, 1979  

SciTech Connect

Information is presented concerning coolant mixing in bundle geometry and subchannel geometry; outlet plenum flow mixing; and theoretical determination of local temperature fields in LMFBR fuel rod bundles.

Todreas, N.E.; Golay, M.W.; Wolf, L.

1979-01-01T23:59:59.000Z

134

A Statistical Method Analyzing LED Lumen Depreciation and Projecting LED Life  

Science Conference Proceedings (OSTI)

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.

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

2010-05-30T23:59:59.000Z

135

Tidal Mixing Signatures in the Indonesian Seas  

Science Conference Proceedings (OSTI)

Expressions of low-frequency tidal periods are found throughout the Indonesian Seas' temperature field, supporting the hypothesis that vertical mixing is enhanced within the Indonesian Seas by the tides. The thermal signatures of tidal mixing ...

Amy Ffield; Arnold L. Gordon

1996-09-01T23:59:59.000Z

136

UV LED lighting for automated crystal centring  

E-Print Network (OSTI)

A direct outcome of the exponential growth of macromolecular crystallography is the continuously increasing demand for synchrotron beam time, both from academic and industrial users. As more and more projects entail screening a profusion of sample crystals, fully automated procedures at every level of the experiments are being implemented at all synchrotron facilities. One of the major obstacles to achieving such automation lies in the sample recognition and centring in the X-ray beam. The capacity of UV light to specifically react with aromatic residues present in proteins or with DNA base pairs is at the basis of UV-assisted crystal centring. Although very efficient, a well known side effect of illuminating biological samples with strong UV sources is the damage induced on the irradiated samples. In the present study the effectiveness of a softer UV light for crystal centring by taking advantage of low-power light-emitting diode (LED) sources has been investigated. The use of UV LEDs represents a lowcost solution for crystal centring with high specificity.

Leonard M. G. Chavas; Yusuke Yamada; Masahiko Hiraki; Noriyuki Igarashi; Naohiro Matsugaki; Soichi Wakatsuki

2010-01-01T23:59:59.000Z

137

Program Led by EM's Carlsbad Field Office Joins Emergency Response...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Program Led by EM's Carlsbad Field Office Joins Emergency Response in National Exercise Program Led by EM's Carlsbad Field Office Joins Emergency Response in National Exercise...

138

New and Underutilized Technology: Airfield LED Lighting | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Technology: Airfield LED Lighting Technology: Airfield LED Lighting New and Underutilized Technology: Airfield LED Lighting October 7, 2013 - 8:57am Addthis The following information outlines key deployment considerations for airfield LED lighting within the Federal sector. Benefits Airfield LED lighting is a good application for colored LED lights since the LED is monochromatic. Reduced maintenance costs dramatically improve economics over existing incandescent. Application Airfield LED lighting is applicable at airports as wells military and domestic air stations and bases. Key Factors for Deployment Federal agencies must determine Federal Aviation Administration (FAA) approval requirements before deployment. Ranking Criteria Federal energy savings, cost-effectiveness, and probability of success are

139

Keeping Pace with LED Lighting Trends | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

and DOE's national laboratories. Topics include: Cost-effectiveness analyses and price projections Advances in LED chips, product designs, and optics LED adoption trends...

140

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

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

in University-Led Nuclear Energy Innovation Energy Department Announces New Investments in University-Led Nuclear Energy Innovation September 27, 2012 - 11:07am Addthis WASHINGTON...

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


141

Solid-State Lighting: Webcast: Evaluating LED Street Lighting...  

NLE Websites -- All DOE Office Websites (Extended Search)

Webcast: Evaluating LED Street Lighting Solutions to someone by E-mail Share Solid-State Lighting: Webcast: Evaluating LED Street Lighting Solutions on Facebook Tweet about...

142

Information Resources: Model Specification for LED Roadway Luminaires...  

NLE Websites -- All DOE Office Websites (Extended Search)

Model Specification for LED Roadway Luminaires Webcast This November 15, 2011 webcast presented information about the Model Specification for LED Roadway Luminaires developed by...

143

Solid-State Lighting: Model Specification for LED Roadway Luminaires...  

NLE Websites -- All DOE Office Websites (Extended Search)

Model Specification for LED Roadway Luminaires Webcast to someone by E-mail Share Solid-State Lighting: Model Specification for LED Roadway Luminaires Webcast on Facebook Tweet...

144

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

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

University-Led Projects to Create More Efficient, Lower Cost Concentrating Solar Power Systems Energy Department Announces New University-Led Projects to Create More Efficient,...

145

Solid-State Lighting: Successful Selection of LED Streetlight...  

NLE Websites -- All DOE Office Websites (Extended Search)

Successful Selection of LED Streetlight Luminaires: Optimizing Illumination and Economic Performance to someone by E-mail Share Solid-State Lighting: Successful Selection of LED...

146

Information Resources: LED Site Lighting in the Commercial Building...  

NLE Websites -- All DOE Office Websites (Extended Search)

the Commercial Building Energy Alliances' (CBEA) efforts to explore the viability of LED site lighting in commercial parking lots. LED technology has the potential for...

147

Affidabilitŕ e prestazioni dei sistemi LED per l'illuminazione.  

E-Print Network (OSTI)

??L'aspetto piů importante nella produzione e utilizzo di led per illuminazione č quello di creare apparecchi led con le massime prestazioni illuminotecniche. Per far ciň… (more)

Serpelloni, Marco

2011-01-01T23:59:59.000Z

148

Avista Utilities - LED Traffic Signal Incentive Program (Idaho...  

Open Energy Info (EERE)

LED Traffic Signal Incentive Program offers a variety of incentives based on annual energy savings for customer LED retrofits. Avista's website has an incentive table that...

149

Ensure Long Lifetimes from Electrolytic Capacitors: a Case Study in LED Light Bulbs  

E-Print Network (OSTI)

Abstract: Electrolytic capacitors are notorious for short lifetimes in high-temperature applications such as LED light bulbs. The careful selection of these devices with proper interpretation of their specifications is essential to ensure that they do not compromise the life of the end product. This application note discusses this problem with electrolytic capacitors in LED light bulbs and provides an analysis that shows how it is possible to use electrolytics in such products. A similar version of this article appeared on EDN, April 6, 2013. Hot LEDs and Short-Lived Electrolytic Capacitors Several years ago, I worked on a few designs for LED light bulbs. Very early on, it became clear that the temperatures of components in such light bulbs can get quite high. I personally measured component temperatures as high as +130°C in light bulbs purchased at local retail stores. Now admittedly, these were early LED bulb designs. Manufacturers now understand that, even though these LED bulbs consume substantially lower power than those they would replace, they still must have good thermal engineering. This is the only way to get the lifetime of the electronics to match the lifetime of the LEDs themselves. I found it disturbing that many of these hot designs contained electrolytic capacitors, which are notorious

Mark Fortunato; Senior Principal; Member Technical Staff

2013-01-01T23:59:59.000Z

150

DOE Lighting Program Update: LED Validation Activities  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

DOE Lighting Program Update DOE Lighting Program Update LED Validation Activities Kelly Gordon Pacific Northwest National Laboratory Federal Utility Partnership Working Group April 15, 2010 Providence, RI www.ssl.energy.gov 2 | Solid-State Lighting Program Legislative Mandate The DOE is directed by U.S. government policy (EPACT 2005, Section 912) to: "...support research, development, demonstration, and commercial application activities related to advanced solid-state lighting technologies based on white light emitting diodes." DOE Lighting Program www.ssl.energy.gov 3 | Solid-State Lighting Program SSL Energy Saving Potential By 2030: * Potential to cut U.S. lighting electricity use by 25% * Cumulative energy savings: $120 billion * Annual energy savings equivalent to:

151

Category:LEDS Example | Open Energy Information  

Open Energy Info (EERE)

Example Example Jump to: navigation, search This page displays examples of country-scale low emission development strategies Pages in category "LEDS Example" The following 12 pages are in this category, out of 12 total. B Bangladesh Climate Change Strategy and Action Plan Brazil National Plan on Climate Change (PNMC) C China's National Climate Change Programme E ESMAP-South Africa-Low Carbon Growth Strategy G Guyana's Low Carbon Development Strategy I India National Action Plan on Climate Change Indonesia National Action Plan Addressing Climate Change J Japan-Action Plan for Achieving a Low-Carbon Society M Mexico's Special Program on Climate Change S Singapore National Climate Change Strategy T Thailand-National Energy Policy and Development Plan U United Kingdom Low Carbon Transition Plan

152

Light Emitting Diodes (LEDs) for General Illumiation  

NLE Websites -- All DOE Office Websites (Extended Search)

LIGHT LIGHT EMITTING DIODES (LEDS) FOR GENERAL ILLUMINATION AN OIDA TECHNOLOGY ROADMAP An OIDA Report March 2001 Co-Sponsored by DOE/BTS and OIDA Compiled by Eric D. Jones Sandia National Laboratories OIDA Member Use Only OIDA OPTOELECTRONICS INDUSTRY DEVELOPMENT ASSOCIATION 1133 Connecticut Avenue, NW Suite 600 Washington, DC 20036 Ph: (202) 785-4426 Fax: (202) 785-4428 Web: http://www.OIDA.org © 2001 OIDA Optoelectronics Industry Development Association All data contained in this report is proprietary to OIDA and may not be distributed in either original or reproduced form to anyone outside the client's internal organization within five years of the report date without prior written permission of the Optoelectronics Industry Development Association. Published by: Optoelectronics Industry Development Association

153

Demonstration of LED Retrofit Lamps at the Smithsonian American Art Museum, Washington, DC  

Science Conference Proceedings (OSTI)

This report documents observations and results obtained from a lighting demonstration project conducted under the U.S. Department of Energy GATEWAY Solid-State Lighting (SSL) Technology Demonstration Program at the Smithsonain American Art Museum in Washington, DC. LED Lamp samples were tested in the museum workshop, temporarily installed in a gallery for feedback, and ultimately replaced all traditional incandescent lamps in one gallery of modernist art at the American Art Museum and partially replacing lamps in two galleries at the Musesum's Renwick Gallery. This report describes the selection and testing process, technology challenges, perceptions, economics, energy use, and mixed results of usign LED replacement lamps in art galleries housing national treasures.

Miller, Naomi J.; Rosenfeld, Scott M.

2012-06-22T23:59:59.000Z

154

Lighting Group: Sources and Ballasts: LED Reflector Lamp  

NLE Websites -- All DOE Office Websites (Extended Search)

LED Reflector Lamp LED Reflector Lamp LED Reflector Lamp Objective LED reflector lamp The goal of this project is to develop a revolutionary new reflector lamp which offers many advantages over current incandescent reflector lamps, including: three times greater efficiency ten times the rated life greater optical and performance properties use of light emitting diodes (LEDs) to generate the light. Although LEDs have been commercially available since the late 1960Â’s, recent dramatic improvements in LED technology have led to white light devices with efficiencies that meet or exceed those of a standard incandescent lamp. This project will build upon these improvements to develop a new type of source for focusing light. Contact Information For more information on this project, please contact:

155

Stage 1: Organizing the LEDS Process | Open Energy Information  

Open Energy Info (EERE)

: Organizing the LEDS Process : Organizing the LEDS Process Jump to: navigation, search Stage 1 LEDS Home Introduction to Framework Assess current country plans, policies, practices, and capacities Develop_BAU Stage 4: Prioritizing and Planning for Actions Begin execution of implementation plans 1.0. Organizing the LEDS Process 1.1. Institutional Structure for LEDS 1.2. Workplan to Develop the LEDS 1.3. Roles and responsibilities to develop LEDS 2.1. Assess current country plans, policies, practices, and capacities 2.2. Compile lessons learned and good practices from ongoing and previous sustainable development efforts in the country 2.3. Assess 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

156

Identify roles and responsibilities for LEDS process | Open Energy  

Open Energy Info (EERE)

roles and responsibilities for LEDS process roles and responsibilities for LEDS process Jump to: navigation, search Stage 1 LEDS Home Introduction to Framework Assess current country plans, policies, practices, and capacities Develop_BAU Stage 4: Prioritizing and Planning for Actions Begin execution of implementation plans 1.0. Organizing the LEDS Process 1.1. Institutional Structure for LEDS 1.2. Workplan to Develop the LEDS 1.3. Roles and responsibilities to develop LEDS 2.1. Assess current country plans, policies, practices, and capacities 2.2. Compile lessons learned and good practices from ongoing and previous sustainable development efforts in the country 2.3. Assess 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

157

Regenerative braking on bicycles to power LED safety flashers  

E-Print Network (OSTI)

This work develops a method for capturing some of the kinetic energy ordinarily lost during braking on bicycles to power LED safety flashers. The system is designed to eliminate: (a) battery changing in popular LED flashers, ...

Collier, Ian M

2005-01-01T23:59:59.000Z

158

NREL: Buildings Research - Brilliant White Light with Amber LEDs...  

NLE Websites -- All DOE Office Websites (Extended Search)

Brilliant White Light with Amber LEDs; NREL Licensing Webinar December 10th November 12, 2013 LED bulbs are the future of lighting for industry, business, and consumers. As the...

159

Seeing the Light: LED Under-Cabinet and Recessed Downlights ...  

NLE Websites -- All DOE Office Websites (Extended Search)

operating at their optimum energy efficiency. I'm definitely drawn to the light-emitting diode (LED) under-cabinet and recessed downlights-just two of the many LED products....

160

Solid-State Lighting: Model Specification for LED Roadway Luminaires  

NLE Websites -- All DOE Office Websites (Extended Search)

Model Specification for LED Roadway Luminaires to someone by E-mail Share Solid-State Lighting: Model Specification for LED Roadway Luminaires on Facebook Tweet about Solid-State...

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


161

Solid-State Lighting: Text-Alternative Version: LED Replacements...  

NLE Websites -- All DOE Office Websites (Extended Search)

Text-Alternative Version: LED Replacements for Linear Fluorescent Lamps to someone by E-mail Share Solid-State Lighting: Text-Alternative Version: LED Replacements for Linear...

162

Solid-State Lighting: LED Replacements for Linear Fluorescent...  

NLE Websites -- All DOE Office Websites (Extended Search)

LED Replacements for Linear Fluorescent Lamps Webcast to someone by E-mail Share Solid-State Lighting: LED Replacements for Linear Fluorescent Lamps Webcast on Facebook Tweet about...

163

LEDs: The Future of Lighting is Here | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

and the common household light bulb have in common? If your answer is that light emitting diode (LED) technology can power all these things, then you're pretty bright. LEDs...

164

Event:LEDS GP Transportation Sector Network Training in Asia...  

Open Energy Info (EERE)

Asia Jump to: navigation, search Calendar.png LEDS GP Transportation Sector Network Training in Asia: on 20120919 Training on transportation issues to be held with the LEDS GP...

165

NIST-Led Standard Enables Agility, Cost and Time Savings  

Science Conference Proceedings (OSTI)

Back to NIST Manufacturing Overview>>. NIST–Led Standard Enables Agility, Cost and Time Savings. Thanks to a successful ...

2012-04-30T23:59:59.000Z

166

NIST AMTech Program Announces Grants for Industry-led ...  

Science Conference Proceedings (OSTI)

NIST AMTech Program Announces Grants for Industry-led Consortia to Explore Issues Hampering Advanced Manufacturing in US. ...

2013-08-06T23:59:59.000Z

167

New NIST-led Consortium Aims to Improve Process for ...  

Science Conference Proceedings (OSTI)

New NIST-led Consortium Aims to Improve Process for Making 'Soft Materials'. From NIST Tech Beat: July 11, 2012. ...

2012-10-18T23:59:59.000Z

168

Percent of 2010 Luminaire Cost LED Luminaire Cost  

E-Print Network (OSTI)

LEDs promise to change the world, and few doubt that they will, but a key limiter to more rapid adoption is the cost of the LED themselves. The cost breakdown of LED luminaires vary, but it is safe to put the cost of the LED at around 25% to 40 % of the total luminaire cost. It is projected to remain a significant cost of the total luminaire for many years.

unknown authors

2012-01-01T23:59:59.000Z

169

A RUGGED LED-BASED SENSOR FOR AIRCRAFT FIRE ...  

Science Conference Proceedings (OSTI)

... a novel. low-weight, Light Emitting Diode (LED)-based optical absorption spectroscopy technique for fire detection. This ...

2011-12-14T23:59:59.000Z

170

Development of Efficient UV-LED Phosphor Coatings for Energy Saving Solid State Lighting  

SciTech Connect

The University of Georgia, in collaboration with GE Global Research, has investigated the relevant quenching mechanism of phosphor coatings used in white light devices based on UV LEDs. The final goal of the project was the design and fabrication of a high-efficacy white light UV-LED device through improved geometry and optimized phosphor coatings. At the end of the research period, which was extended to seamlessly carry over the research to a follow-up program, we have demonstrated a two-fold improvement in the conversion efficiency of a white light LED device, where the increase efficacy is due to both improved phosphor quantum efficiency and lamp geometry. Working prototypes have been displayed at DOE sponsored meetings and during the final presentation at the DOE Headquarters in Washington, DC. During the first phase of the project, a fundamental understanding of quenching processes in UV-LEDs was obtained, and the relationships that describe the performance of the phosphor as a function of photon flux, temperature, and phosphor composition were established. In the second phase of the project, these findings were then implemented to design the improved UV-LED lamp. In addition, our research provides a road map for the design of efficient white light LEDs, which will be an important asset during a follow-up project led by GE.

Uwe Happek

2006-05-15T23:59:59.000Z

171

How might the use of LEDs be expanded in  

E-Print Network (OSTI)

, the replacement of incandescent bulbs with inorganic-based LEDs could potentially revolutionize indoor lightingScientists at the National Renewable Energy Laboratory (NREL) invent a deep green LED that can lead to higher-efficiency white light, lower electric bills. The white light light-emitting diode (LED

Sherrill, David

172

Series Input Modular Architecture for Driving Multiple LEDs  

E-Print Network (OSTI)

, where each cell drives four 700 mA LEDs. Keywords ­ solid-state lighting, light emitting diodes, LED have been achieved over the past decade in solid state light emitting diodes (LEDs), leading to high, L. Zhou, G. Harbers, and M. Craford, "Status and future of high-power light-emitting diodes

173

LIGHT EMITTING DIODE (LED) TRAFFIC SIGNAL SURVEY RESULTS  

E-Print Network (OSTI)

CALIFORNIA ENERGY COMMISSION LIGHT EMITTING DIODE (LED) TRAFFIC SIGNAL SURVEY RESULTS STAFFREPORT: Assistance needs 26 Item 12: Information requested 28 Appendix A: Light Emitting Diode (LED) Traffic Signal efficiency upgrades. - 29 - #12;APPENDIX A - 30 - #12;California Energy Commission Light Emitting Diode (LED

174

High Efficiency Driving Electronics for General Illumination LED Luminaires  

SciTech Connect

New generation of standalone LED driver platforms developed, which are more efficient These LED Drivers are more efficient (?90%), smaller in size ( 0.15 in3/watt), lower in cost ( 12 cents/watt in high volumes in millions of units). And these products are very reliable having an operating life of over 50,000 hours. This technology will enable growth of LED light sources in the use. This will also help in energy saving and reducing total life cycle cost of LED units. Two topologies selected for next generation of LED drivers: 1) Value engineered single stage Flyback topology. This is suitable for low powered LED drivers up to 50W power. 2) Two stage boost power factor correction (PFC) plus LLC half bridge platform for higher powers. This topology is suitable for 40W to 300W LED drivers. Three new product platforms were developed to cover a wide range of LED drivers: 1) 120V 40W LED driver, 2) Intellivolt 75W LED driver, & 3) Intellivolt 150W LED driver. These are standalone LED drivers for rugged outdoor lighting applications. Based on these platforms number of products are developed and successfully introduced in the market place meeting key performance, size and cost goals.

Upadhyay, Anand

2012-10-31T23:59:59.000Z

175

Development of UV-LED Phosphor Coatings for High Efficiency Solid State Lighting  

SciTech Connect

The University of Georgia, in collaboration with GE Global Research, is investigating the relevant quenching mechanism of phosphor coatings used in white light devices based on UV LEDs in a focused eighteen month program. The final goal is the design of high-efficacy white UV-LEDs through improved and optimized phosphor coatings. At the end of the first year, we have reached a fundamental understanding of quenching processes in UV-LED phosphors and have observed severe quenching in standard devices under extreme operating conditions. Relationships are being established that describe the performance of the phosphor as a function of photon flux, temperature, and phosphor composition. These relationships will provide a road map for the design of efficient white light LEDs during the final six months of the project.

U. Happek

2005-01-01T23:59:59.000Z

176

Solid-State Lighting: Text-Alternative Version: LED Essentials -  

NLE Websites -- All DOE Office Websites (Extended Search)

Essentials - Technology, Applications, Advantages, Disadvantages to someone Essentials - Technology, Applications, Advantages, Disadvantages to someone by E-mail Share Solid-State Lighting: Text-Alternative Version: LED Essentials - Technology, Applications, Advantages, Disadvantages on Facebook Tweet about Solid-State Lighting: Text-Alternative Version: LED Essentials - Technology, Applications, Advantages, Disadvantages on Twitter Bookmark Solid-State Lighting: Text-Alternative Version: LED Essentials - Technology, Applications, Advantages, Disadvantages on Google Bookmark Solid-State Lighting: Text-Alternative Version: LED Essentials - Technology, Applications, Advantages, Disadvantages on Delicious Rank Solid-State Lighting: Text-Alternative Version: LED Essentials - Technology, Applications, Advantages, Disadvantages on Digg

177

Two-stage Ignition as an Indicator of Low Temperature Combustion in a Late Injection Pre-mixed Compression Ignition Control Strategy  

E-Print Network (OSTI)

Internal combustion engines have dealt with increasingly restricted emissions requirements. After-treatment devices are successful in bringing emissions into compliance, but in-cylinder combustion control can reduce their burden by reducing engine out emissions. For example, oxides of nitrogen (NOx) are diesel combustion exhaust species that are notoriously difficult to remove by after-treatment. In-cylinder conditions can be controlled for low levels of NOx, but this produces high levels of soot potentially leading to increased particulate matter (PM). The simultaneous reduction of NOx and PM can be realized through a combustion process known as low temperature combustion (LTC). In this study, the typical definition of LTC as the defeat of the inverse relationship between soot and NOx is not applicable as a return to the soot-NOx tradeoff is observed with increasing exhaust gas recirculation (EGR). It is postulated that this effect is the result of an increase in the hot ignition equivalence ratio, moving the combustion event into a slightly higher soot formation region. This is important because a simple emissions based definition of LTC is no longer helpful. In this study, the manifestation of LTC in the calculated heat release profile is investigated. The conditions classified as LTC undergo a two-stage ignition process. Two-stage ignition is characterized by an initial cool-flame reaction followed by typical hot ignition. In traditional combustion conditions, the ignition is fast enough that a cool-flame is not observed. By controlling initial conditions (pressure, temperature, and composition), the creation and duration of the cool-flame event is predictable. Further, the effect that injection timing and the exhaust gas recirculation level have on the controlling factors of the cool-flame reaction is well correlated to the duration of the cool-flame event. These two results allow the postulation that the presence of a sufficiently long cool-flame reaction indicates a combustion event that can be classified as low temperature combustion. A potential method for identifying low temperature combustion events using only the rate of heat release profile is theorized. This study employed high levels of EGR and late injection timing to realize the LTC mode of ordinary petroleum diesel fuel. Under these conditions, and based on a 90 percent reduction in nitric oxide and no increase in smoke output relative to the chosen baseline condition, a two part criteria is developed that identifies the LTC classified conditions. The criteria are as follow: the combustion event of conventional petroleum diesel fuel must show a two-stage ignition process; the first stage (cool-flame reaction) must consume at least 2 percent of the normalized fuel energy before the hot ignition commences.

Bittle, Joshua

2010-12-01T23:59:59.000Z

178

III-Nitride LEDs with photonic crystal structures.  

SciTech Connect

Electrical operation of III-Nitride light emitting diodes (LEDs) with photonic crystal structures is demonstrated. Employing photonic crystal structures in III-Nitride LEDs is a method to increase light extraction efficiency and directionality. The photonic crystal is a triangular lattice formed by dry etching into the III-Nitride LED. A range of lattice constants is considered (a {approx} 270-340nm). The III-Nitride LED layers include a tunnel junction providing good lateral current spreading without a semi-absorbing metal current spreader as is typically done in conventional III-Nitride LEDs. These photonic crystal III-Nitride LED structures are unique because they allow for carrier recombination and light generation proximal to the photonic crystal (light extraction area) yet displaced from the absorbing metal contact. The photonic crystal Bragg scatters what would have otherwise been guided modes out of the LED, increasing the extraction efficiency. The far-field light radiation patterns are heavily modified compared to the typical III-Nitride LED's Lambertian output. The photonic crystal affects the light propagation out of the LED surface, and the radiation pattern changes with lattice size. LEDs with photonic crystals are compared to similar III-Nitride LEDs without the photonic crystal in terms of extraction, directionality, and emission spectra.

Wendt, Joel Robert; Sigalas, M. M. (Agilent Technologies, Palo Alto, CA); Epler, J. E. (Lumileds Lighting, San Jose, CA); Krames, M. R. (Lumileds Lighting, San Jose, CA); Li, D. (University of New Mexico, Albuquerque NM); Brueck, Stephen R. J. (University of New Mexico, Albuquerque NM); Shagam, M. (Boston University, Boston, MA); Gardner, N. F. (Lumileds Lighting, San Jose, CA); Wierer, Jonathan J. (Lumileds Lighting, San Jose, CA)

2005-02-01T23:59:59.000Z

179

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

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Study: Environmental Benefits of LEDs Greater Than CFLs 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 Jim Brodrick Lighting Program Manager MORE RESOURCES Find out how LED lighting works Get project planning and analysis tools Subscribe to Solid-State Lighting's email distribution list Increasingly, light emitting diode (LED) screw-based lamps are providing consumers a cost-effective and energy efficient alternative to compact

180

Which LED Lighting Products Would You Consider Trying? | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Which LED Lighting Products Would You Consider Trying? Which LED Lighting Products Would You Consider Trying? Which LED Lighting Products Would You Consider Trying? August 5, 2010 - 7:30am Addthis On Monday, Chris discussed his upcoming project to replace the lighting in his kitchen and family room. Chris is considering LED (light-emitting diode) lighting, especially for his kitchen, where they can be installed under the cabinets. LEDs can also be used for other applications, including task lighting, recessed downlights, and holiday lighting. Which LED lighting products would you consider trying? Or, if you're already using LEDs, what do you think of them? Each Thursday, you have the chance to share your thoughts on a question about energy efficiency or renewable energy for consumers. Please comment with your answers, and also feel free to respond to other comments.

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While these samples are representative of the content of NLEBeta,
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We encourage you to perform a real-time search of NLEBeta
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181

Solid-State Lighting: DOE Hosts LED Industry Standards Workshop  

NLE Websites -- All DOE Office Websites (Extended Search)

Information Information Resources Printable Version Share this resource Send a link to Solid-State Lighting: DOE Hosts LED Industry Standards Workshop to someone by E-mail Share Solid-State Lighting: DOE Hosts LED Industry Standards Workshop on Facebook Tweet about Solid-State Lighting: DOE Hosts LED Industry Standards Workshop on Twitter Bookmark Solid-State Lighting: DOE Hosts LED Industry Standards Workshop on Google Bookmark Solid-State Lighting: DOE Hosts LED Industry Standards Workshop on Delicious Rank Solid-State Lighting: DOE Hosts LED Industry Standards Workshop on Digg Find More places to share Solid-State Lighting: DOE Hosts LED Industry Standards Workshop on AddThis.com... Conferences & Meetings Past Conferences Presentations Publications Webcasts Videos Tools

182

Stage 1: Organizing the LEDS Process | Open Energy Information  

Open Energy Info (EERE)

Stage 1: Organizing the LEDS Process Stage 1: Organizing the LEDS Process (Redirected from Low Emission Development Strategies Methodology) Jump to: navigation, search Stage 1 LEDS Home Introduction to Framework Assess current country plans, policies, practices, and capacities Develop_BAU Stage 4: Prioritizing and Planning for Actions Begin execution of implementation plans 1.0. Organizing the LEDS Process 1.1. Institutional Structure for LEDS 1.2. Workplan to Develop the LEDS 1.3. Roles and responsibilities to develop LEDS 2.1. Assess current country plans, policies, practices, and capacities 2.2. Compile lessons learned and good practices from ongoing and previous sustainable development efforts in the country 2.3. Assess public and private sector capacity to support initiatives 2.4. Assess and improve the national GHG inventory and other

183

Reducing LED Costs Through Innovation | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Reducing LED Costs Through Innovation 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 cuts a thin steel plate that will be formed into lighting fixture housing. Wisconsin-based Eaton Corporation is developing a new manufacturing process that streamlines LED fixture designs. | Photo courtesy of Eaton Corporation A combination solid-state laser turret cutter and stamping machine cuts a thin steel plate that will be formed into lighting fixture housing. Wisconsin-based Eaton Corporation is developing a new manufacturing process that streamlines LED fixture designs. | Photo courtesy of Eaton Corporation A goniometer measures the photometric output distribution of an outdoor LED street light fixture. 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

184

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

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Study: Environmental Benefits of LEDs Greater Than CFLs 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 Jim Brodrick Lighting Program Manager MORE RESOURCES Find out how LED lighting works Get project planning and analysis tools Subscribe to Solid-State Lighting's email distribution list Increasingly, light emitting diode (LED) screw-based lamps are providing consumers a cost-effective and energy efficient alternative to compact

185

LEDSGP/about/Asia LEDS Partnership | Open Energy Information  

Open Energy Info (EERE)

source source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Page Edit History Facebook icon Twitter icon » LEDSGP/about/Asia LEDS Partnership < LEDSGP‎ | about(Redirected from Asia LEDS Partnership) Jump to: navigation, search LEDSGP Logo.png Advancing climate-resilient low emission development around the world Home About Tools Expert Assistance Events Publications Join Us About How We Work > Regional Platforms > Working Groups LEDS GP Members Steering Committee Guiding Structure Contacts Asia LEDS Partnership (ALP) A LEDS GP Regional Network ALT Steering Committee ALP Steering Committee The Asia LEDS Partnership Steering Committee met on March, 2013 in Pattaya, Thailand following the LEDS Global Partnership second annual workshop to

186

New and Underutilized Technology: Exterior LED/Solid State Lighting |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Exterior LED/Solid State Lighting Exterior LED/Solid State Lighting New and Underutilized Technology: Exterior LED/Solid State Lighting October 4, 2013 - 4:55pm Addthis The following information outlines key deployment considerations for exterior LED/solid state lighting within the Federal sector. Benefits LED lighting economics can work in high electric cost areas with high hours of use. Pricing continually decreases for LED lighting. This technology provides quality, white, even lighting with good color rendition. Greater cost savings can be achieved when combined with bi-level motion sensors to reduce light levels in parking areas, garages, and walkways. Application Exterior LED/solid state lighting is applicable in areas where security and visual performance are critical, including street lighting, parking lots,

187

LED Traffic Lights Get Buy American Stamp | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

LED Traffic Lights Get Buy American Stamp LED Traffic Lights Get Buy American Stamp LED Traffic Lights Get Buy American Stamp November 29, 2010 - 10:00am Addthis LED traffic lights are assembled at Dialight’s factory in Roxboro, N.C. The company has expanded production at the facility, adding more than 100 jobs over the past two years. | Photo Courtesy of Dialight LED traffic lights are assembled at Dialight's factory in Roxboro, N.C. The company has expanded production at the facility, adding more than 100 jobs over the past two years. | Photo Courtesy of Dialight Lindsay Gsell LED traffic lights are assembled at Dialight's factory in Roxboro, N.C. The company has expanded production at the facility, adding more than 100 jobs over the past two years. Red. Yellow. Green. What LED traffic signals don't say: Made in USA.

188

Energy-Efficient, High-Color-Rendering LED Lamps Using Oxyfluoride and Fluoride Phosphors  

Science Conference Proceedings (OSTI)

LED lamps using phosphor downconversion can be designed to replace incandescent or halogen sources with a 'warm-white' correlated color temperature (CCT) of 2700-3200 K and a color rendering index (CRI) greater than 90. However, these lamps have efficacies of {approx}70% of standard 'cool-white' LED packages (CCT = 4500-6000 K; CRI = 75-80). In this report, we describe structural and luminescence properties of fluoride and oxyfluoride phosphors, specifically a (Sr,Ca){sub 3}(Al,Si)O{sub 4}(F,O):Ce{sup 3+} yellow-green phosphor and a K{sub 2}TiF{sub 6}:Mn{sup 4+} red phosphor, that can reduce this gap and therefore meet the spectral and efficiency requirements for high-efficacy LED lighting. LED lamps with a warm-white color temperature (3088 K), high CRI (90), and an efficacy of {approx}82 lm/W are demonstrated using these phosphors. This efficacy is {approx}85% of comparable cool-white lamps using typical Y{sub 3}Al{sub 5}O{sub 12}:Ce{sup 3+}-based phosphors, significantly reducing the efficacy gap between warm-white and cool-white LED lamps that use phosphor downconversion.

Setlur, A.; Radkov, E; Henderson, C; Her, J; Srivastava, A; Karkada, N; Kishore, M; Kumar, N; Aesram, D; et al.

2010-01-01T23:59:59.000Z

189

LEDs Ready for Takeoff at Louisiana Airport | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

LEDs Ready for Takeoff at Louisiana Airport LEDs Ready for Takeoff at Louisiana Airport LEDs Ready for Takeoff at Louisiana Airport July 14, 2010 - 3:34pm Addthis Hammond, La., airport is replacing the existing incandescent taxiway lights (pictured) with LEDs. | Photo courtesy of Hammond Northshore Regional Airport Hammond, La., airport is replacing the existing incandescent taxiway lights (pictured) with LEDs. | Photo courtesy of Hammond Northshore Regional Airport Stephen Graff Former Writer & editor for Energy Empowers, EERE What are the key facts? Upgrades for safety, energy at Hammond airport possible through Recovery Act Taxiway lights to be replaced with LEDs Airport could save up to $15,000 annually on electric bills Energy efficiency is taking off at the airport in Hammond, La., about 70

190

New and Underutilized Technology: Interior LED/Solid State Lighting |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Interior LED/Solid State Lighting Interior LED/Solid State Lighting New and Underutilized Technology: Interior LED/Solid State Lighting October 4, 2013 - 4:53pm Addthis The following information outlines key deployment considerations for interior LED/solid state lighting within the Federal sector. Benefits Interior LED retrofits are currently viable for down lights, track lighting, sconces, and both line and low voltage task lighting. Replacements for incandescent A-lamps have also been improving rapidly. Replacements for fluorescent tube lighting may be viable for high-cost maintenance areas. Application Interior LED/solid state lighting is a rapidly improving technology currently most applicable for down lights, track lights, task lighting, accenting, high ceiling, and high cost maintenance areas.

191

IADB/UNDP LEDS Community of Practice | Open Energy Information  

Open Energy Info (EERE)

IADB/UNDP LEDS Community of Practice IADB/UNDP LEDS Community of Practice Jump to: navigation, search Name IADB/UNDP LEDS Community of Practice Agency/Company /Organization Inter-American Development Bank, United Nations Development Programme (UNDP) Sector Climate, Energy Focus Area People and Policy Topics Low emission development planning, -LEDS, Policies/deployment programs Website http://finanzascarbono.org/com References LEDS Community of Practice-Carbon Finance Platform[1] "The objective of this Community of Practice is to provide the LAC region with information and facilitate technical discussions about the process of preparing national Low Emission Development Strategies. The workplan for 2012 includes the organization of discussion forums, seminars and webinars on LEDS preparation.

192

Wisconsin LED Plant Benefits from Recovery Act | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Wisconsin LED Plant Benefits from Recovery Act Wisconsin LED Plant Benefits from Recovery Act Wisconsin LED Plant Benefits from Recovery Act April 1, 2010 - 6:58pm Addthis Stephen Graff Former Writer & editor for Energy Empowers, EERE What does this mean for me? LED lights emit more light, have a longer life and provide anywhere from 50 to 70 percent in energy savings. Rudd Lighting has seen a boost from cities tapping Recovery Act funds and seeking energy efficient lighting that will reduce costs. The BetalLED facility, which produced hundreds of thousands of LED products last year, employs about 600 people, and for every job in the plant, eight to 10 more are created outside the company. Workers at a Racine, Wis., manufacturing company are busy filling orders for American cities seeking to brighten their communities with energy

193

Enhancing Capacity for Low Emission Development Strategies (EC-LEDS):  

Open Energy Info (EERE)

Enhancing Capacity for Low Emission Development Strategies (EC-LEDS): Enhancing Capacity for Low Emission Development Strategies (EC-LEDS): Distributed Generation Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Enhancing Capacity for Low Emission Development Strategies (EC-LEDS): Distributed Generation Agency/Company /Organization: National Renewable Energy Laboratory Sector: Energy Topics: Low emission development planning, -LEDS Resource Type: Webinar Website: eeredev.nrel.gov/_proofs/video/2013_EC-LEDS/ Cost: Free References: Enhancing Capacity for Low Emission Development Strategies (EC-LEDS): Distributed Generation[1] Overview A webinar on distributed generation, presented by the National Renewable Energy Laboratory, with funding from the U.S. Agency for International Development. This webinar covers the basics of distributed generation, with an emphasis

194

LEDs Ready for Takeoff at Louisiana Airport | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

LEDs Ready for Takeoff at Louisiana Airport LEDs Ready for Takeoff at Louisiana Airport LEDs Ready for Takeoff at Louisiana Airport July 14, 2010 - 3:34pm Addthis Hammond, La., airport is replacing the existing incandescent taxiway lights (pictured) with LEDs. | Photo courtesy of Hammond Northshore Regional Airport Hammond, La., airport is replacing the existing incandescent taxiway lights (pictured) with LEDs. | Photo courtesy of Hammond Northshore Regional Airport Stephen Graff Former Writer & editor for Energy Empowers, EERE What are the key facts? Upgrades for safety, energy at Hammond airport possible through Recovery Act Taxiway lights to be replaced with LEDs Airport could save up to $15,000 annually on electric bills Energy efficiency is taking off at the airport in Hammond, La., about 70

195

Wisconsin LED Plant Benefits from Recovery Act | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Wisconsin LED Plant Benefits from Recovery Act Wisconsin LED Plant Benefits from Recovery Act Wisconsin LED Plant Benefits from Recovery Act April 1, 2010 - 6:58pm Addthis Stephen Graff Former Writer & editor for Energy Empowers, EERE What does this mean for me? LED lights emit more light, have a longer life and provide anywhere from 50 to 70 percent in energy savings. Rudd Lighting has seen a boost from cities tapping Recovery Act funds and seeking energy efficient lighting that will reduce costs. The BetalLED facility, which produced hundreds of thousands of LED products last year, employs about 600 people, and for every job in the plant, eight to 10 more are created outside the company. Workers at a Racine, Wis., manufacturing company are busy filling orders for American cities seeking to brighten their communities with energy

196

Have You Used LED Light Strings? | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

LED Light Strings? LED Light Strings? Have You Used LED Light Strings? December 3, 2009 - 7:30am Addthis This week, you read about LED holiday light strings, which can use 90% less energy than regular incandescent light strings. You may even be able to save on the initial costs with rebates from stores or your utility; check to find out what's being offered in your area. Have you used LED light strings? Tell us what you think of them. Each Thursday, you have the chance to share your thoughts on a question about energy efficiency or renewable energy for consumers. E-mail your responses to the Energy Saver team at consumer.webmaster@nrel.gov. Addthis Related Articles Save Money with LED Holiday Light Strings Tips to Save Energy During the Holidays Choosing Energy-Saving Lighting Products Saves You Money

197

LED Lighting on the National Mall | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

LED Lighting on the National Mall LED Lighting on the National Mall LED Lighting on the National Mall Addthis 1 of 8 Facing East toward the Capitol Building, LED retrofitted lights line the interior paths of the mall while preserving the architectural integrity of the original fixtures. Image: Energy Department Image | Photo by Quentin Kruger (Contractor) | Public Domain Date taken: 2012-01-30 06:00 2 of 8 Energy Secretary Steven Chu discusses the 65% savings on electric bills and lowered maintenance costs the National Parks Service is experiencing by switching to energy efficient LED lights. "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 last includes taking advantage of all of America's energy resources while

198

List of LED Exit Signs Incentives | Open Energy Information  

Open Energy Info (EERE)

LED Exit Signs Incentives LED Exit Signs Incentives Jump to: navigation, search The following contains the list of 72 LED Exit Signs Incentives. CSV (rows 1 - 72) Incentive Incentive Type Place Applicable Sector Eligible Technologies Active AEP SWEPCO - Commercial and Industrial Energy Efficiency Rebate Programs (Arkansas) Utility Rebate Program Arkansas Commercial Fed. Government Industrial Institutional Local Government Nonprofit Schools State Government Building Insulation Central Air conditioners Chillers Custom/Others pending approval Duct/Air sealing Lighting Lighting Controls/Sensors Motor VFDs Motors Roofs LED Exit Signs Commercial Refrigeration Equipment Ground Source Heat Pumps Yes APS - Energy Efficiency Solutions for Business (Arizona) Utility Rebate Program Arizona Commercial

199

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

NLE Websites -- All DOE Office Websites (Extended Search)

New LED parking area lights at the NAVFAC Engineering Service Center at Port Hueneme provide high quality, evenly distributed light. Photo courtesy of PNNL because of its long...

200

Commercial Lighting and LED Lighting Incentives (Vermont) | Open...  

Open Energy Info (EERE)

form History Share this page on Facebook icon Twitter icon Commercial Lighting and LED Lighting Incentives (Vermont) This is the approved revision of this page, as well as...

Note: This page contains sample records for the topic "mixed temperatures led" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
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We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Avista Utilities - LED Traffic Signal Incentive Program (Washington...  

Open Energy Info (EERE)

with form History Share this page on Facebook icon Twitter icon Avista Utilities - LED Traffic Signal Incentive Program (Washington) This is the approved revision of this...

202

Lighting the Great Outdoors: LEDs in Exterior Applications  

SciTech Connect

Recent progress in the development of white light LEDs promises great impact by opening up the huge potential for LED illumination in new areas. One such area is general illumination for exterior applications. For example, there are an estimated combined 60.5 million roadway and parking installations in the U.S. These lights account for an estimated 53.3 TWh of electricity usage annually -- nearly 7% of all lighting. If LEDs could provide the same light performance with just 25% greater efficiency, savings of over 13 TWh could be achieved. In 2007, the authors assessed emerging LED lighting technologies in a parking garage and on a city street. The purpose of these tests was to enable a utility to determine whether energy efficiency programs promoting white light LED products might be justified. The results have supported the great promise of LEDs in exterior applications, while also highlighting the barriers that continue to hinder their widespread adoption. Such barriers include 1) inconsistent product quality across manufacturers; 2) lack of key metrics for comparing LEDs to conventional sources; and 3) high upfront cost of LED luminaires compared to conventional luminaires. This paper examines these barriers, ways in which energy-efficiency programs could help to overcome them, and the potential for energy and financial savings from LED lighting in these two exterior applications.

Cook, Tyson D. S.; Bryan, Mary M.; Kinzey, Bruce R.; Myer, Michael

2008-08-17T23:59:59.000Z

203

LED North America Receives Exclusive Patent License for ORNL...  

NLE Websites -- All DOE Office Websites (Extended Search)

Highlights Success Stories Contact Us Index Home | ORNL | Success Stories SHARE LED North America Receives Exclusive Patent License for ORNL Technology June 19, 2013 Views...

204

LED Provides Effective and Efficient Lighting in Freezer Storage  

NLE Websites -- All DOE Office Websites (Extended Search)

by example, saving energy and taxpayer dollars in federal facilities Spotlight on Design LED Provides Effective and Efficient Lighting in Freezer Storage Room New lighting...

205

Automated selection of LEDs by luminance and chromaticity coordinate  

E-Print Network (OSTI)

The increased use of LEDs for lighting purposes has led to the development of numerous applications requiring a pre-selection of LEDs by their luminance and / or their chromaticity coordinate. This paper demonstrates how a manual pre-selection process can be realized using a relatively simple configuration. Since a manual selection service can only be commercially viable as long as only small quantities of LEDs need to be sorted, an automated solution suggests itself. This paper introduces such a solution, which has been developed by Harzoptics in close cooperation with Rundfunk Gernrode. The paper also discusses current challenges in measurement technology as well as market trends.

Fischer, Ulrich H P; Reinboth, Christian

2010-01-01T23:59:59.000Z

206

NIST Report Recommends New Privately Led Steering Group ...  

Science Conference Proceedings (OSTI)

NIST Report Recommends New Privately Led Steering Group to Drive Trusted Identities in Cyberspace. From NIST Tech Beat: February 7, 2012. ...

2012-02-08T23:59:59.000Z

207

LED LAMP OR BULB WITH REMOTE PHOSPHOR AND DIFFUSER ...  

An LED lamp or bulb is disclosed that comprises a light source, a heat sink structure and an optical cavity. The optical cavity comprises a phosphor ...

208

An LED to Read By - Materials Technology @ TMS  

Science Conference Proceedings (OSTI)

Apr 27, 2009 ... LEDs convert 20 to 50 percent of their input energy into light. In contrast, a traditional incandescent bulb converts only about five percent of ...

209

Category:LEDS Global Partnership Tools | Open Energy Information  

Open Energy Info (EERE)

resources and presentations, lessons learned and best practices, as well as LEDS guides and manuals. LEDSGPtools This category currently contains no pages or media....

210

LCD/LED Digit recognition by iPhone.  

E-Print Network (OSTI)

??Home medical devices with LCD or LED screens are quite common. While they offer many conveniences, the data is usually not retained. In this thesis,… (more)

Li, Xian

2011-01-01T23:59:59.000Z

211

I led nel panorama odierno delle sorgenti luminose.  

E-Print Network (OSTI)

??La tecnologia dei LED risale alla metŕ del 1900, ma solo recentemente si č pensato di utilizzare queste sorgenti per l’illuminazione. Tuttavia alcune peculiaritŕ dei… (more)

Scarabottolo, Enrico

2010-01-01T23:59:59.000Z

212

Solid-State Lighting: LED Essentials - Technology, Applications...  

NLE Websites -- All DOE Office Websites (Extended Search)

Applications, Advantages, Disadvantages to someone by E-mail Share Solid-State Lighting: LED Essentials - Technology, Applications, Advantages, Disadvantages on Facebook Tweet...

213

Information Resources: Member Case Studies: LED Street Lighting...  

NLE Websites -- All DOE Office Websites (Extended Search)

Member Case Studies: LED Street Lighting Programs in Algona (IA), Asheville (NC), and Boston (MA) This May 8, 2013 webcast featured presentations from DOE Municipal Solid-State...

214

Lighting Group: Sources and Ballasts: LED Task Light  

NLE Websites -- All DOE Office Websites (Extended Search)

light The goal of this project is to accelerate the use of energy efficient light emitting diode (LED) technology for general lighting applications by developing a task lamp...

215

LED- ja loisteputkivalon vaikutus maitotaloustuotteiden ja perunan laatuun.  

E-Print Network (OSTI)

??Tutkielman kirjallisuuskatsauksessa tarkasteltiin valoa, erilaisia valonlähteitä ja niiden ominaisuuksia. Erityisesti keskityttiin LED (Light Emitting Diode) valoon ja sen ominaisuuksiin, koska sen käyttö myös yleisessä valaistuksessa… (more)

Solala, Kari

2009-01-01T23:59:59.000Z

216

Driver Circuit for White LED Lamps with TRIAC Dimming Control.  

E-Print Network (OSTI)

??An efficient Light Emitting Diode (LED) lamp driver circuit is proposed for retrofitting the conventionally used incandescent lamps with existing TRIAC dimmer. The dimming feature… (more)

Weng, Szu-Jung

2012-01-01T23:59:59.000Z

217

Event:LEDS Latin America Regional Platform Facilitator Training...  

Open Energy Info (EERE)

Regional Platform Facilitator Training Jump to: navigation, search Calendar.png LEDS Latin America Regional Platform Facilitator Training: on 20121105 MAPS Facilitator Training:...

218

Event:LEDS GP Transportation Sector Network Training in Africa...  

Open Energy Info (EERE)

Calendar.png LEDS GP Transportation Sector Network Training in Africa: on 20121019 Training on transportation issues to be held with the Second Conference on Climate Change and...

219

Event:LEDS GP Transportation Sector Network Training | Open Energy...  

Open Energy Info (EERE)

Training Jump to: navigation, search Calendar.png LEDS GP Transportation Sector Network Training in Latin America: on 20121015 Training on transportation issues to be held with...

220

Increasing Market Penetration of LED Traffic Signals in New York State Review of Articles and Information on LED Traffic Signals  

E-Print Network (OSTI)

A primary purpose of this review is to identify and summarize recently published information about the use and performance of light-emitting diode (LED) traffic signals. It consists of two sections: a synopsis of experiences of municipalities using LED traffic signals in 1999 and 2000, and a discussion of technical, economic and market issues surrounding the deployment of LED signals. This review includes articles and reports published in 1999 and 2000.

Bullough, J D; Bullough, John D.; Suozzo, Margaret

2002-01-01T23:59:59.000Z

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


221

Ultra Bright LED Light Injection Calibration System for MINOS  

E-Print Network (OSTI)

We describe here a proposal for a light injection calibration system for the MINOS detectors based on ultra bright blue LEDs as the light source. We have shown that these LEDs are bright enough to span over two orders of magnitude in light intensity, commensurate with that expected in a single scintillator strip in the MINOS neutrino detectors.

Anderson, B; Dervan, P J; Lauber, J A; Thomas, J

1999-01-01T23:59:59.000Z

222

Virtual International Research/Education Center: Energy Saving LEDs  

Science Conference Proceedings (OSTI)

This paper presents an establish and operation of energy saving LEDs virtual international research/education center. This is a long-term international engineering education and research collaboration program among California Polytechnic State University ... Keywords: Virtual, research/education center, LEDs

Xiaomin Jin, Xiao-Hua Yu, Xiang-Ning Kang, Guo-Yi Zhang, Guifang Dong

2013-07-01T23:59:59.000Z

223

New LED light sources and lamps for general illumination  

E-Print Network (OSTI)

of light source compared to traditional light sources like incandescent bulbs and fluorescent tubes bulb. LEDs emit colored light with a narrow spectral band of 20-30 nm, colors covering the spectralNew LED light sources and lamps for general illumination Carsten Dam-Hansen, Birgitte Thestrup

224

Ultra Bright LED Light Injection Calibration System for MINOS  

E-Print Network (OSTI)

We describe here a proposal for a light injection calibration system for the MINOS detectors based on ultra bright blue LEDs as the light source. We have shown that these LEDs are bright enough to span over two orders of magnitude in light intensity, commensurate with that expected in a single scintillator strip in the MINOS neutrino detectors.

B. Anderson; A. Anjomshoaa; P. Dervan; J. A. Lauber; J. Thomas

1998-10-26T23:59:59.000Z

225

Low Cost Lithography Tool for High Brightness LED Manufacturing  

Science Conference Proceedings (OSTI)

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.

Andrew Hawryluk; Emily True

2012-06-30T23:59:59.000Z

226

Ultra Bright LED Light Injection Calibration System for MINOS  

E-Print Network (OSTI)

We describe here a proposal for a light injection calibration system for the MINOS detectors based on ultra bright blue LEDs as the light source. We have shown that these LEDs are bright enough to span over two orders of magnitude in light intensity, commensurate with that expected in a single scintillator strip in the MINOS neutrino detectors. 1

B. Anderson; A. Anjomshoaa; P. Dervan; J. A. Lauber; J. Thomas

2008-01-01T23:59:59.000Z

227

Information Resources: Webcast: Evaluating LED Street Lighting Solutions  

NLE Websites -- All DOE Office Websites (Extended Search)

Evaluating LED Street Lighting Solutions Evaluating LED Street Lighting Solutions In this July 20, 2010 webcast, Edward Smalley of Seattle City Light provided an update on DOE Municipal Solid-State Street Lighting Consortium activities. The webcast also presented perspectives from members who are involved with implementing LED street lighting evaluations, including Tod Rosinbum of the City of Portland, Oregon, John Walter of National Grid, and Amy Olay of the City of San Jose, California. View presentation slides (Visit the Adobe® Web site to Download Adobe Reader.) Introduction (PDF 984 KB) Edward Smalley, DOE Municipal Solid-State Street Lighting Consortium, Moderator Evaluating LED Street Lighting Solutions (PDF 404 KB) Tod Rosinbum, City of Portland, Oregon LED Pilot Projects: A Utility Perspective (PDF 112 KB)

228

LED Lights for All Occasions | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Lights for All Occasions Lights for All Occasions LED Lights for All Occasions November 15, 2012 - 1:15pm Addthis With such a variety of lights available, LEDs are a perfect choice for holiday lighting. | Photo courtesy of ©iStockphoto.com/Birzio With such a variety of lights available, LEDs are a perfect choice for holiday lighting. | Photo courtesy of ©iStockphoto.com/Birzio Elizabeth Spencer Communicator, National Renewable Energy Laboratory 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 blog. And energy-efficient lights--and particularly LEDs--are one of those wonderful things that come up a lot around the holidays, since there are so many wonderful ways to use them. But it's still too early to talk about

229

Kenya-LEDS Tier I Activities | Open Energy Information  

Open Energy Info (EERE)

Kenya-LEDS Tier I Activities Kenya-LEDS Tier I Activities Jump to: navigation, search Name Kenya-LEDS Tier I Activities Agency/Company /Organization United States Department of State, United States Department of Agriculture Partner Multiple Ministries of Agriculture Sector Climate, Land Focus Area Agriculture, Land Use Topics Co-benefits assessment, Low emission development planning, -LEDS Website http://transition.usaid.gov/ou Program Start 2011 Program End 2014 Country Kenya Eastern Africa References Enhancing Capacity for Low Emission Development Strategies Program[1] Overview "Enhancing Capacity for Low Emission Development Strategies (EC-LEDS) is a U.S. Government initiative to support developing countries' efforts to pursue long-term, transformative development and accelerate sustainable,

230

LED Traffic Lights Get Buy American Stamp | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

LED Traffic Lights Get Buy American Stamp LED Traffic Lights Get Buy American Stamp LED Traffic Lights Get Buy American Stamp November 30, 2010 - 10:19am Addthis Red. Yellow. Green. What LED traffic signals don't say: Made in USA. That is changing. Dialight Corporation, an LED lighting manufacturer with U.S. corporate offices in Farmingdale, New Jersey, and a parent company based in the U.K., invested nearly $3 million into renovating their 75,000-square-foot production facility in Roxboro, North Carolina. With these improvements, Dialight's Roxboro plant is projected to scale up production by 400 percent. "Bringing manufacturing back to America is a win-win scenario," said Roy Burton, Dialight's Group Chief Executive. "We're helping the economy by creating new jobs, and at the same time we're finding it more

231

LED Lighting: Just the Facts, Please! | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

LED Lighting: Just the Facts, Please! LED Lighting: Just the Facts, Please! LED Lighting: Just the Facts, Please! January 4, 2010 - 7:30am Addthis John Lippert My June 16, 2009 blog gave tips on purchasing high-quality LED lights. Now there's another arsenal in the toolbox to help consumers find LED lights they can trust: the Lighting Facts(tm) label. As part of the SSL Quality Advocates voluntary pledge program developed jointly by the U.S. Department of Energy and the Next Generation Lighting Industry Alliance (NGLIA), the label is similar to the familiar nutrition label found on most food products. The label contains a lot of information that can help a consumer compare lighting products, including: light output in lumens; watts, the power the light consumes; lumens per watt, a measure of the product's efficacy (how

232

Solid-State Lighting: Municipal Consortium LED Street Lighting Workshop  

NLE Websites -- All DOE Office Websites (Extended Search)

Los Angeles, CA to someone Los Angeles, CA to someone by E-mail Share Solid-State Lighting: Municipal Consortium LED Street Lighting Workshop Presentations and Materials-Los Angeles, CA on Facebook Tweet about Solid-State Lighting: Municipal Consortium LED Street Lighting Workshop Presentations and Materials-Los Angeles, CA on Twitter Bookmark Solid-State Lighting: Municipal Consortium LED Street Lighting Workshop Presentations and Materials-Los Angeles, CA on Google Bookmark Solid-State Lighting: Municipal Consortium LED Street Lighting Workshop Presentations and Materials-Los Angeles, CA on Delicious Rank Solid-State Lighting: Municipal Consortium LED Street Lighting Workshop Presentations and Materials-Los Angeles, CA on Digg Find More places to share Solid-State Lighting: Municipal Consortium

233

Costa Rica-LEDS Tier I Activities | Open Energy Information  

Open Energy Info (EERE)

Costa Rica-LEDS Tier I Activities Costa Rica-LEDS Tier I Activities Jump to: navigation, search Name Costa Rica-LEDS Tier I Activities Agency/Company /Organization United States Department of State, United States Department of Agriculture Partner Multiple Ministries of Agriculture Sector Climate, Land Focus Area Agriculture, Land Use Topics Co-benefits assessment, Low emission development planning, -LEDS Website http://transition.usaid.gov/ou Program Start 2011 Program End 2014 Country Costa Rica Central America References Enhancing Capacity for Low Emission Development Strategies Program[1] Overview "Enhancing Capacity for Low Emission Development Strategies (EC-LEDS) is a U.S. Government initiative to support developing countries' efforts to pursue long-term, transformative development and accelerate sustainable,

234

Save Money with LED Holiday Light Strings | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Money with LED Holiday Light Strings Money with LED Holiday Light Strings Save Money with LED Holiday Light Strings December 1, 2009 - 11:19am Addthis Allison Casey Senior Communicator, NREL It's hard to believe, but the holidays are in full swing and many of you are starting to decorate your homes. Those of you who started around Halloween are probably feeling pretty smart because you got your decorating done while the weather was nice. I see you there, snacking on your Thanksgiving leftovers, laughing at me shivering in the cold and struggling to undo the knot in my lights. Don't look so smug. Those of us who haven't started decorating yet may actually be the smart ones this year, because we still have a chance to buy LED light strings. LED (or light emitting diode) light strings can use 90% less energy than

235

LED-induced fluorescence diagnostics for turbine and combustion engine thermometry  

DOE Green Energy (OSTI)

Fluorescence from phosphor coatings is the basis of an established technique for measuring temperature in a wide variety of turbine and combustion engine applications. Example surfaces include blades, vanes, combustors, intake valves, pistons, and rotors. Many situations that are remote and noncontact require the high intensity of a laser to illuminate the phosphor, especially if the surface is moving. Thermometric resolutions of 0.1 C are obtainable, and some laboratory versions of these systems have been calibrated against NIST standards to even higher precision. To improve the measurement signal-to-noise ratio, synchronous detection timing has been used to repeatedly interrogate the same blade in a high speed rotating turbine. High spatial resolution can be obtained by tightly focusing the interrogation beam in measurements of static surfaces, and by precise differential timing of the laser pulses on rotating surfaces. We report here the use of blue light emitting diodes (LEDs) as a n illumination source for producing useable fluorescence from phosphors for temperature measurements. An LED can excite most of the same phosphors used to cover the temperature range from 8 to 1400 C. The advantages of using LEDs are obvious in terms of size, power requirements, space requirements and cost. There can also be advantages associated with very long operating lifetimes, wide range of available colors, and their broader emission bandwidths as compared to laser diodes. Temperature may be inferred either from phase or time-decay determinations.

Allison, S.W.

2001-08-17T23:59:59.000Z

236

LED traffic lights: New technology signals major energy savings  

SciTech Connect

Using light-emitting diode technology to replace incandescent lamps in traffic signals promises energy savings upwards of 60 percent for each of the estimated quarter of a million controlled intersections in the United States. LED units use only 9 to 25 watts instead of the 67 to 150 watts used by each incandescent lamp. Though their first cost is relatively high, energy savings result in paybacks of 1 to 5 years. LED retrofit kits are available for red signal disks and arrows, and installations in several states have proven successful, although minor improvements are addressing concerns about varying light output and controller circuitry. Retrofitting green lamps is not yet feasible, because color standards of the Institute of Traffic Engineers cannot be met with existing LED technology. Yellow lamps have such low duty factors (they`re on only 3 percent of the time) that retrofitting with LED signals is not cost-effective. LEDs last much longer than incandescents, allowing municipalities to not only reduce their electricity bills, but to save on maintenance costs as well. As further incentive, some utilities are beginning to implement rebate programs for LED traffic signal retrofits. Full approval of LED units is still awaited from the Institute of Traffic Engineers (ITE), the standard-setting body for traffic safety devices. Local and state governments ultimately decide what specifications to require for traffic lights, and the growing body of successful field experience with LEDs appears to be raising their comfort level with the technology. The California Department of Transportation is developing an LED traffic light specification, and two California utilities, Southern California Edison and Pacific Gas and Electric, have provided rebates for some pilot installations.

Houghton, D.

1994-12-31T23:59:59.000Z

237

University of Nevada Las Vegas LED Display Engineering  

Science Conference Proceedings (OSTI)

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.

None

2010-08-31T23:59:59.000Z

238

Advanced Mixing Models  

Propose mixing indicators. Turbulence kinetic energy ... (Turbulence intensity observed at Point 8 in Tank B & C) Advanced Mixing Models. Computational Sciences. 13.

239

LEDS Collaboration in Action Workshop | Open Energy Information  

Open Energy Info (EERE)

LEDS Collaboration in Action Workshop LEDS Collaboration in Action Workshop Jump to: navigation, search LEDSGP Logo.png Advancing climate-resilient low emission development around the world Home About Tools Expert Assistance Events Publications Join Us London Event Participant Pack Agenda Accommodations Participants Location Arrival Form Open Space Sessions Speakers Presentations Links Contact Us Low Emissions Development Strategies (LEDS) Global Partnership Collaboration in Action Workshop 21-23 March 2012 London, UK The workshop brought together carefully selected low emission development leaders from around the world to share experiences and explore opportunities to enhance coordination 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 exchange

240

Energy Department Announces New Investments in University-Led Nuclear  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

New Investments in University-Led New Investments 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 nuclear innovation projects. The three awards announced today under the Department's Nuclear Energy University Programs (NEUP) will support nuclear energy R&D and student investment at U.S. colleges and universities across the country, ensuring that secure, safe and efficient nuclear energy

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


241

LEDS Capacity Building and Training Inventory | Open Energy Information  

Open Energy Info (EERE)

LEDS Capacity Building and Training Inventory LEDS Capacity Building and Training Inventory Jump to: navigation, search Home | About | Inventory | Partnerships | Capacity Building | Webinars | Reports | Events | News | List Serve LEDS Capacity Building and Training Activities and Resources Upcoming Capacity Building Events CLEAN shares capacity building activity information to encourage technical institutions to better coordinate efforts and avoid duplication of effort. If you are aware of an upcoming LEDS-related training or capacity building event please add it to the calendar below. Add Capacity Building or Training Event Webinars Title Developer Biopower Tool Webinar National Renewable Energy Laboratory United States Department of Energy Centro de EnergĂ­as Renovables (CER) CESC-Webinar: Building an Innovation and Entrepreneurship Driven Economy: How Policies Can Foster Risk Capital Investment in Renewable Energy Clean Energy Solutions Center

242

Energy Department Announces New Investments in University-Led Nuclear  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Energy Department Announces New Investments in University-Led Energy Department Announces New Investments 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 nuclear innovation projects. The three awards announced today under the Department's Nuclear Energy University Programs (NEUP) will support nuclear energy R&D and student investment at U.S. colleges and universities across the country, ensuring that secure, safe and efficient nuclear energy

243

Keeping Pace with LED Lighting Trends | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Keeping Pace with LED Lighting Trends Keeping Pace with LED Lighting Trends Keeping Pace with LED Lighting Trends October 23, 2013 - 10:41am Addthis This year's SSL Market Introduction Workshop will take place in Portland, Oregon. | Photo courtesy of Travel Portland This year's SSL Market Introduction Workshop will take place in Portland, Oregon. | Photo courtesy of Travel Portland Jim Brodrick Lighting Program Manager Rapid advances in solid-state lighting (SSL) technology are reducing the cost, improving the performance and quality, and bringing new lighting options--light emitting diodes (LEDs) to the market. But for lighting and energy efficiency industry professionals this seemingly good news can be "too much of a good thing." Imagine the challenge of making smart institutional purchasing decisions or designing

244

LEDS Collaboration in Action Workshop Presentations | Open Energy  

Open Energy Info (EERE)

source source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Page Edit History Facebook icon Twitter icon » LEDS Collaboration in Action Workshop Presentations Jump to: navigation, search LEDSGP Logo.png Advancing climate-resilient low emission development around the world Home About Tools Expert Assistance Events Publications Join Us ACDS Workshop Participant Pack Agenda Accommodations Participants Location Arrival Form Open Space Sessions Speakers Presentations Links Contact Us Presentation and Related Documents Documents Title Welcome.pdf Welcome to the LEDS Collaboration in Action Workshop Round1.pdf ROUND 1 - Strategy Development: the case for LEDS at the country level Round2.pdf ROUND 2 - Analytics and Tools: developing national level LEDS inventories and scenarios

245

Laboratory Evaluation of LED T8 Replacement Lamp Products  

Science Conference Proceedings (OSTI)

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.

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

2011-05-23T23:59:59.000Z

246

Team Led by Argonne Gets Best Paper Award | Argonne National...  

NLE Websites -- All DOE Office Websites (Extended Search)

Team Led by Argonne Gets Best Paper Award June 23, 2008 Tweet EmailPrint A team of researchers from 7 different research institutes, lead by Argonne National Laboratory, gets the...

247

Deputy Secretary Poneman Announces Team led by Oak Ridge National...  

NLE Websites -- All DOE Office Websites (Extended Search)

Deputy Secretary Poneman Announces Team led by Oak Ridge National Lab Selected to Receive up to 122 Million for Nuclear Energy Innovation Hub WASHINGTON, D.C. As part of a...

248

Solid-State Lighting: Municipal Consortium LED Street Lighting...  

NLE Websites -- All DOE Office Websites (Extended Search)

Boston, MA to someone by E-mail Share Solid-State Lighting: Municipal Consortium LED Street Lighting Workshop Presentations and Materials-Boston, MA on Facebook Tweet about...

249

Solid-State Lighting: Municipal Consortium LED Street Lighting...  

NLE Websites -- All DOE Office Websites (Extended Search)

Dallas, TX to someone by E-mail Share Solid-State Lighting: Municipal Consortium LED Street Lighting Workshop Presentations and Materials-Dallas, TX on Facebook Tweet about...

250

Applicazioni in ambito medico/biologico dei LED.  

E-Print Network (OSTI)

??Lo scopo di tale lavoro č studiare le varie applicazioni dell’illuminazione a stato solido (LED), tecnologia tutt’ora in via d’espansione. Nel primo capitolo, dopo aver… (more)

Rui, Chiara

2012-01-01T23:59:59.000Z

251

Pulsed Single-Photon Resonant Cavity Quantum Dot LED  

Science Conference Proceedings (OSTI)

Previously, the authors demonstrated single-photon emission of cw-operated InP QDs up to at least 80 K in a simple light emitting diode (LED) configuration [2].

252

Surface Mounted Under Counter Dimmable LED Strip-STR8  

Science Conference Proceedings (OSTI)

The product under assessment is an advanced lighting technologya controllable, surface mounted under-counter light emitting diode (LED) strip lighting system that is designed to provide various levels of direct and indirect white light.

2008-06-12T23:59:59.000Z

253

Solid-State Lighting: Text-Alternative Version: Dimming LEDs...  

NLE Websites -- All DOE Office Websites (Extended Search)

So you need to pay careful attention to any time where the current is zero in a light emitting diode. So I already mentioned LEDs typically need what's called a driver. And the...

254

Mixing Processes within the Polar Night Jet  

Science Conference Proceedings (OSTI)

Lagrangian material line simulations are performed using U.K. Meteorological Office assimilated winds and temperatures to examine mixing processes in the middle- and lower-stratospheric polar night jet during the 1992 Southern Hemisphere spring ...

R. Bradley Pierce; T. Duncan Fairlie; William L. Grose; Richard Swinbank; Alan O'Neill

1994-10-01T23:59:59.000Z

255

An Integrated Solid-State LED Luminaire for General Lighting  

Science Conference Proceedings (OSTI)

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.

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

2009-03-31T23:59:59.000Z

256

Outdoor Light-Emitting Diode (LED) Digital Signage  

Science Conference Proceedings (OSTI)

Utilities have been supporting outdoor advertising companies and their traditional simple billboards for many years. The level of support these billboards needed was minimal because electricity for them was only used to power basic lighting technologies. The growth in the billboard industry combined with the explosion in available electronic and digital systems and the advancements made in light-emitting diodes (LEDs) has resulted in a new type of billboard8212the LED electronic billboard. Electronic bil...

2009-12-17T23:59:59.000Z

257

Lattice-Mismatched GaInP LED Devices and Methods of ...  

A method (100) of fabricating an LED or the active regions of an LED and an LED (200). The method includes growing, depositing or otherwise providing a bottom ...

258

Quality and Performance of LED Flashlights in Kenya: Common End User Preferences and Complaints  

E-Print Network (OSTI)

with torches? Failure of: ? LEDs/Bulb [1] ? Battery [2] ?to incandescent bulbs, and low cost LEDs have achieved pricepowered LED flashlights. Incandescent bulb flashlights are

Tracy, Jenny

2010-01-01T23:59:59.000Z

259

Quality and Performance of LED Flashlights in Kenya: Common End User Preferences and Complaints  

E-Print Network (OSTI)

serious quality problems with LED flashlights, whichare the LED products that have achieved the greatest levels2008. "Measured Off? Grid LED Lighting System Performance."

Tracy, Jenny

2010-01-01T23:59:59.000Z

260

Archival Activism: Independent and Community-led Archives, Radical Public History and the Heritage Professions  

E-Print Network (OSTI)

independent and community-led archival endeavors as it isindependent and community-led archives and those operatingindependent and community-led archives are strongly

Flinn, Andrew

2011-01-01T23:59:59.000Z

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


261

A Model for Interprofessional Health Disparities Education: Student-Led Curriculum on Chronic Hepatitis B Infection  

E-Print Network (OSTI)

Disparities Education: Student-Led Curriculum on Chronicenrolled in the student-led HBV curriculum. Since theDISCUSSION: Our student-led didactic and experiential

Sheu, Leslie C.; Toy, Brian C.; Kwahk, Emanuel; Yu, Albert; Adler, Joshua; Lai, Cindy J.

2010-01-01T23:59:59.000Z

262

Span-Wise Mixing in a Multi-Stage Compressor  

NLE Websites -- All DOE Office Websites (Extended Search)

Camci) 036 * Phenomena that have eluded gas turbine designers include the effects of rotor-stator interactions and the physics of mixing of velocity, pressure, temperature and...

263

Color Maintenance of LEDs in Laboratory and Field Applications  

SciTech Connect

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 ?u'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.

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

2013-09-30T23:59:59.000Z

264

High-Efficiency Non-Polar GaN-Based LEDs  

SciTech Connect

Inlustra Technologies with subcontractor U.C. Santa Barbara conducted a project with the principle goal of demonstrating high internal quantum efficiency blue (430 nm) and green (540nm) light emitting diodes (LEDs) on low-defect density non-polar GaN wafers. Inlustra pursued the fabrication of smooth thick a-plane and m-plane GaN films, as well as defect reduction techniques such as lateral epitaxial overgrowth (LEO) to uniformly lower dislocation density in these films. Limited free-standing wafers were produced as well. By the end of the reporting period, Inlustra had met its milestone of dislocation reduction to < 5 x 10{sup 6} cm{sup -2}. Stacking faults were still present in appreciable density ({approx} 1 x 10{sup 5} cm{sup -1}), but were not the primary focus of defect reduction since there have been no published studies establishing their detrimental effects on LED performance. Inlustra's LEO progress built a solid foundation upon which further commercial development of GaN substrates will occur. UCSB encountered multiple delays in its LED growth and fabrication efforts due to unavoidable facilities outages imposed by ongoing construction in an area adjacent to the metalorganic chemical vapor deposition (MOCVD) laboratory. This, combined with the large amount of ab initio optimization required for the MOCVD system used during the project, resulted in unsatisfactory LED progress. Although numerous blue-green photoluminescence results were obtained, only a few LED structures exhibited electroluminescence at appreciable levels. UCSB also conducting extensive modeling (led by Prof. Van de Walle) on the problem of non-radiative Auger recombination in GaN-based LED structures, which has been posited to contribute to LED efficiency 'droop' at elevated current density. Unlike previous modeling efforts, UCSB's approach was truly a first-principles ab initio methodology. Building on solid numerical foundations, the Auger recombination rates of In{sub x}Ga{sub 1-x}N alloys were calculated from first-principles density-functional and many-body-perturbation theory. The differing mechanisms of inter- and intra-band recombination were found to affect different parts of the emission spectrum. In the blue to green spectral region and at room temperature the Auger coefficient was calculated to be as large as 2 x 10{sup -30} cm{sup 6} s{sup -1}; in the infrared it is even larger. These results indicated that Auger recombination may be responsible for the loss of quantum efficiency that affects InGaN-based light emitters, whether on non-polar or polar crystal planes.

Paul Fini

2010-11-30T23:59:59.000Z

265

High-Efficiency Non-Polar GaN-Based LEDs  

Science Conference Proceedings (OSTI)

Inlustra Technologies with subcontractor U.C. Santa Barbara conducted a project with the principle goal of demonstrating high internal quantum efficiency blue (430 nm) and green (540nm) light emitting diodes (LEDs) on low-defect density non-polar GaN wafers. Inlustra pursued the fabrication of smooth thick a-plane and m-plane GaN films, as well as defect reduction techniques such as lateral epitaxial overgrowth (LEO) to uniformly lower dislocation density in these films. Limited free-standing wafers were produced as well. By the end of the reporting period, Inlustra had met its milestone of dislocation reduction to LED performance. Inlustra's LEO progress built a solid foundation upon which further commercial development of GaN substrates will occur. UCSB encountered multiple delays in its LED growth and fabrication efforts due to unavoidable facilities outages imposed by ongoing construction in an area adjacent to the metalorganic chemical vapor deposition (MOCVD) laboratory. This, combined with the large amount of ab initio optimization required for the MOCVD system used during the project, resulted in unsatisfactory LED progress. Although numerous blue-green photoluminescence results were obtained, only a few LED structures exhibited electroluminescence at appreciable levels. UCSB also conducting extensive modeling (led by Prof. Van de Walle) on the problem of non-radiative Auger recombination in GaN-based LED structures, which has been posited to contribute to LED efficiency 'droop' at elevated current density. Unlike previous modeling efforts, UCSB's approach was truly a first-principles ab initio methodology. Building on solid numerical foundations, the Auger recombination rates of In{sub x}Ga{sub 1-x}N alloys were calculated from first-principles density-functional and many-body-perturbation theory. The differing mechanisms of inter- and intra-band recombination were found to affect different parts of the emission spectrum. In the blue to green spectral region and at room temperature the Auger coefficient was calculated to be as large as 2 x 10{sup -30} cm{sup 6} s{sup -1}; in the infrared it is even larger. These results indicated that Auger recombination may be responsible for the loss of quantum efficiency that affects InGaN-based light emitters, whether on non-polar or polar crystal planes.

Paul Fini

2010-11-30T23:59:59.000Z

266

Secretary Chu Announces Funding for 71 University-Led Nuclear...  

NLE Websites -- All DOE Office Websites (Extended Search)

energy. As a zero-carbon energy source, nuclear power must be part of our energy mix as we work towards energy independence and meeting the challenge of global warming,...

267

Secretary Chu Announces Funding for 71 University-Led Nuclear...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

energy. "As a zero-carbon energy source, nuclear power must be part of our energy mix as we work toward energy independence and meeting the challenge of global warming,"...

268

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

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

LED Holiday Lights: Festive, Safe, and Efficient! LED Holiday Lights: Festive, Safe, and Efficient! LED Holiday Lights: Festive, Safe, and Efficient! December 2, 2010 - 4:34pm Addthis Andy Oare Andy Oare Former New Media Strategist, Office of Public Affairs Ed. Note cross posted from the Energy Savers Blog. Written by Allison Casey 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 stepladder, all in anticipation of one glorious moment: Dad's annual trip to the emergency room. I kid (and sincerely hope that's not your yearly ritual), but in addition

269

Event:LEDS GP Event at Bonn | Open Energy Information  

Open Energy Info (EERE)

Bonn Bonn Jump to: navigation, search Calendar.png LEDS GP Event at Bonn: 17:00 - 19:15pm on 2012/05/23 This event will be co-hosted by the International Partnership on Mitigation and MRV (http://www.mitigationpartnership.net/) and the LEDS Global Partnership (http://openei.org/wiki/LEDSGP). The event titled Catalyzing Cooperative Action for Low Emissions Development will take place on May 23, 2012 from 17:00-19:15 at the BMU Headquarters in Bonn and will be followed by a reception from 19:15-20:30. The purpose of the event is to share information and learning related to current activities, to discuss and receive feedback on these activities, and to explore opportunities for linking with related initiatives. Event Details Name LEDS GP Event at Bonn Date 2012/05/23

270

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

Open Energy Info (EERE)

131112) Presentacion LAC LEDs.pdf 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 page 1 2 3 4 5 6 7 8 9 10 Go! next page → next page → Full resolution ‎(1,500 × 1,125 pixels, file size: 775 KB, MIME type: application/pdf, 10 pages) File history Click on a date/time to view the file as it appeared at that time. Date/Time Thumbnail Dimensions User Comment current 14:15, 12 December 2012 Thumbnail for version as of 14:15, 12 December 2012 1,500 × 1,125, 10 pages (775 KB) Gjones (Talk | contribs) You cannot overwrite this file. Edit this file using an external application (See the setup instructions for more information) File usage The following page links to this file:

271

Tests gauge LED sensors for fuel-dye measurements  

SciTech Connect

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.

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

2009-10-19T23:59:59.000Z

272

An LED-based Flasher System for VERITAS  

E-Print Network (OSTI)

We describe a flasher system designed for use in monitoring the gains of the photomultiplier tubes used in the VERITAS gamma-ray telescopes. This system uses blue light-emitting diodes (LEDs) so it can be operated at much higher rates than a traditional laser-based system. Calibration information can be obtained with better statistical precision with reduced loss of observing time. The LEDs are also much less expensive than a laser. The design features of the new system are presented, along with measurements made with a prototype mounted on one of the VERITAS telescopes.

Hanna, D; McCutcheon, M; Nikkinen, L; 10.1016/j.nima.2009.10.107

2009-01-01T23:59:59.000Z

273

EC-LEDS in the Agriculture Sector | Open Energy Information  

Open Energy Info (EERE)

the Agriculture Sector the Agriculture Sector Jump to: navigation, search Name EC-LEDS in the Agriculture Sector Agency/Company /Organization United States Department of Agriculture, United States Department of State Partner Ministry of Agriculture, Ministry of Environment Sector Climate, Land Focus Area Agriculture, Economic Development, Greenhouse Gas, Land Use Topics Adaptation, Implementation, Low emission development planning, -LEDS, Policies/deployment programs Program Start 2011 Program End 2013 Country Costa Rica, Kenya, Mexico, Vietnam Central America, Eastern Africa, Central America, South-Eastern Asia References Land Use Assessment Toolkit - Agriculture Resources[1] Overview Progress and Outcomes Capacity building activities include strengthening implementation of

274

Life-Cycle Assessment of Energy and Environmental Impacts of LED Lighting Products, Part 3: LED Environmental Testing  

SciTech Connect

This report covers the third part of a larger U.S. Department of Energy (DOE) project to assess the life-cycle environmental and resource impacts in the manufacturing, transport, use, and disposal of light-emitting diode (LED) lighting products in relation to incumbent lighting technologies. All three reports are available on the DOE website (www.ssl.energy.gov/tech_reports.html). • Part 1: Review of the Life-Cycle Energy Consumption of Incandescent, Compact Fluorescent and LED Lamps; • Part 2: LED Manufacturing and Performance; • Part 3: LED Environmental Testing. Parts 1 and 2 were published in February and June 2012, respectively. The Part 1 report included a summary of the life-cycle assessment (LCA) process and methodology, provided a literature review of more than 25 existing LCA studies of various lamp types, and performed a meta-analysis comparing LED lamps with incandescent and compact fluorescent lamps (CFLs). Drawing from the Part 1 findings, Part 2 performed a more detailed assessment of the LED manufacturing process and used these findings to provide a comparative LCA taking into consideration a wider range of environmental impacts. Both reports concluded that the life-cycle environmental impact of a given lamp is dominated by the energy used during lamp operation—the upstream generation of electricity drives the total environmental footprint of the product. However, a more detailed understanding of end-of-life disposal considerations for LED products has become increasingly important as their installation base has grown. The Part 3 study (reported herein) was undertaken to augment the LCA findings with chemical analysis of a variety of LED, CFL, and incandescent lamps using standard testing procedures. A total of 22 samples, representing 11 different models, were tested to determine whether any of 17 elements were present at levels exceeding California or Federal regulatory thresholds for hazardous waste. Key findings include: • The selected models were generally found to be below thresholds for Federally regulated elements; • All CFLs and LED lamps and most incandescent lamps exceeded California thresholds for Copper; • Most CFL samples exceeded California thresholds for Antimony and Nickel, and half of the LED samples exceeded California thresholds for Zinc; • The greatest contributors were the screw bases, drivers, ballasts, and wires or filaments; • Overall concentrations in LED lamps were comparable to cell phones and other types of electronic devices, and were generally attributable to components other than the internal LED light sources; • Although the life-cycle environmental impact of the LED lamps is favorable when compared to CFLs and incandescent lamps, recycling will likely gain importance as consumer adoption increases. This study was exploratory in nature and was not intended to provide a definitive indication of regulatory compliance for any specific lamp model or technology. Further study would be needed to more broadly characterize the various light source technologies; to more accurately and precisely characterize a specific model; or to determine whether product redesign would be appropriate.

Tuenge, Jason R.; Hollomon, Brad; Dillon, Heather E.; Snowden-Swan, Lesley J.

2013-03-01T23:59:59.000Z

275

GaSb-based Type-I QW LEDs and addressable arrays operated at wavelengths up to 3.66 m  

E-Print Network (OSTI)

Sb-based quantum wells (QW) light emitting diodes (LED) and LED arrays operating at room temperature at wavelengths. Kipshidze, D.Westerfeld, D. Snyder, M.Johnson, G. Belenky, "GaSb-Based Type I Quantum Well Light Emitting Diode Addressable Array Operated at Wavelengths up to 3.66 µm", IEEE Photonics Technol. Lett. 21, 1087

276

LED traffic signals: A market transformation opportunity assessment  

SciTech Connect

This report examines the feasibility and appropriateness of market intervention strategies to increase the penetration of LED traffic signals, which offer large energy savings and other benefits relative to existing incandescent traffic signals. It presents the state of the technology and some of the technical challenges that remain. Prepared for the Consortium for Energy Efficiency.

Suozzo, M.

1998-12-31T23:59:59.000Z

277

Small Area Array-Based LED Luminaire Design  

SciTech Connect

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.

Thomas Yuan

2008-01-09T23:59:59.000Z

278

A Comparison of Led-From and Leads-to  

E-Print Network (OSTI)

Progress properties of parallel programs are often expressed using the operator leads-to, a binary relation over predicates on the program state. Informally, p leads-to q means that from a state satisfying p a state satisfying q is reached eventually. We investigate the notion of the weakest predicate that leads-to q, for some given q. We formalize this notion by defining a predicate transformer called led-from and show that led-from maps a predicate q to the weakest predicate that leads-to q. We also demonstrate that led-from and leads-to are equivalent in expressive power by showing that each can be defined in terms of the other. The advantages of basing concurrent program semantics on the predicate transformer led-from rather than the relation leads-to are similar to those of basing sequential program semantics on the predicate transformer wp rather than on the relation of Hoare-Triples {p}S{q}. In particular, questions about junctivity properties can be raised and answered. Am...

Edgar Knapp

1988-01-01T23:59:59.000Z

279

The predictions of optoelectronic attributes of LED by neural network  

Science Conference Proceedings (OSTI)

In this paper, the predictions of optoelectronic attributes of Light-Emitting Diode (LED) chip, including luminous intensity, wavelength and forward voltage by using neural network were presented. The simulated data was measured by Electrical Luminescence ... Keywords: Neural network, Optoelectronic attributes, Prediction

Pin-Hsuan Weng; Yu-Ju Chen; Shuming T. Wang; Rey-Chue Hwang

2010-09-01T23:59:59.000Z

280

Advanced method for increasing the efficiency of white light quantum dot LEDs  

SciTech Connect

Covering a light-emitting diode (LED) with quantum dots (QDs) can produce a broad spectrum of white light. However, current techniques for applying QDs to LEDs suffer from a high density of defects and a non-uniform distribution of QDs, which, respectively, diminish the efficiency and quality of emitted light. Oak Ridge National Laboratory (ORNL) has the unique capability to thermally anneal QD structures at extremely high power densities for very short durations. This process, called pulse thermal processing (PTP), reduces the number of point defects while maintaining the size and shape of the original QD nanostructure. Therefore, the efficiency of the QD wavelength conversion layer is improved without altering the emission spectrum defined by the size distribution of theQD nanoparticles. The current research uses a thermal model to predict annealing temperatures during PTP and demonstrates up to a 300% increase in photoluminescence for QDs on passive substrates.

Duty, Chad E [ORNL; Bennett, Charlee J C [ORNL; Sabau, Adrian S [ORNL; Jellison Jr, Gerald Earle [ORNL; Boudreaux, Philip R [ORNL; Walker, Steven C [ORNL; Ott, Ronald D [ORNL

2011-01-01T23:59:59.000Z

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


281

Mixed Waste Treatment Study  

Science Conference Proceedings (OSTI)

As part of an ongoing integrated mixed waste program, EPRI has documented nuclear utility industry experience in the on-site treatment of mixed waste. This report reviews all available exclusions/exceptions to EPA permitting requirements for environmentally responsible on-site management of mixed waste. Included is a description of emerging mixed waste treatment technologies along with a detailed evaluation of off-site treatment/disposal facilities.

1996-01-31T23:59:59.000Z

282

Analysis of mixing layer heights inferred from radiosonde, wind profiler, airborne lidar, airborne microwave temperature profiler, and in-situ aircraft data during the Texas 2000 air quality study in Houston, TX  

E-Print Network (OSTI)

The mixing layer (ML) heights inferred from radiosondes, wind profilers, airborne lidar, airborne microwave temperature profiler (MTP), and in-situ aircraft data were compared during the Texas 2000 Air Quality Study in the Houston area. The comparisons and resulting good agreement between the separate instruments allowed for the spatial and temporal evolution of the ML height distribution to be determined across the Houston area on September 1, 2000. A benchmark method was created for determining ML heights from radiosonde data. The ML heights determined using this method were compared to ML heights determined using wind profiler data. The airborne lidar and MTP heights were also compared to the wind profiler heights. This was the first time the MTP was used for estimating ML heights. Because of this, the MTP heights were also compared to the ML heights determined by in-situ aircraft data. There was good agreement between the ML estimates when the instruments were co-located. The comparisons between the benchmark method and the wind profilers were independent of the quality of the profiler heights. The statistics for lidar and the wind profilers were better for the inland profiler comparisons. Even so, the results for coastal profilers were similar to the other comparisons. The results between the MTP and the wind profilers were comparable with the results found between the other instruments, and better, in that the statistics were similar for the both the inland and coastal profilers. The results between the MTP and in-situ aircraft data provided additional support for the use of MTP for determining ML heights. The combination of the inland and coastal wind profilers with the airborne instruments provided adequate information for the spatial and temporal evolution of the ML height to be determined across the Houston area on September 1, 2000. By analyzing the ML height distribution, major features were evident. These features included the shallow ML heights associated with the marine air from Galveston Bay and the Gulf of Mexico, and the sharp gradient of increasing ML heights north of Houston associated with the variation in the inversion depth found on this day.

Smith, Christina Lynn

2003-05-01T23:59:59.000Z

283

The Elusive “Life” of LEDs: How TM-21 Contributes to the Solution  

SciTech Connect

This magazine article discusses the issue of LED 'lifetime' and explains where TM-21 plays as part of the solution to this issue. In August 2011, the Illuminating Engineering Society (IES) published the TM-21 document entitled 'Lumen degradation lifetime estimation method for LED light sources.' TM-21 is the IES-recommended method for projecting lumen degradation of an LED package, array or module based on data collected according to LM-80. The lighting community expects TM-21 to become the standard method for projecting useful LED lighting product life at realistic operating temperature. This article presents the development process behind TM-21, and clarifies how and when to apply the lifetime extrapolation method to arrive at reasonable and useful estimations. Why TM-21 and why now? We are all familiar with the very real but sometimes exaggerated long-life attributes of LED technology. Not the least of these is the potential for very long life that helps make it an attractive design choice. The trick has been and continues to be how to measure or estimate this longevity to provide assurance to users of this technology's reliability (life) compared to other options. We also understand that the overall reliability of a complete LED lighting fixture can be affected by the reliability of individual product components (driver, lens, etc.) and should be accounted for in lifetime estimations. The useful life of standard lighting technologies is defined as the time to filament or cathode failure. For most of these lamps, the time period prior to failure exhibits acceptable levels of light output, as shown with the solid lines in Fig. 1. This makes it easy to determine when to replace the lamp. However, LEDs do not have filament burn-out that conveniently announces the end of life (dashed line in Fig. 1). Further, the rapid development of the technology and the desire to bring products to market in a timely manner does not allow for actual testing verification of the long lives claimed (100,000 or even 35,000 hours). As a result, the industry has come to accept a definition of the end of the useful life of an LED as the point when it no longer provides a specified level of light output. And finally, the life and performance of LED lighting products depends greatly on excess heat retained at the diode. This is why LEDs require testing at multiple temperatures such that when a source is installed in a luminaire, its actual operating temperature can be measured and lumen depreciation of the product can be derived. Therefore, to serve the solid-state lighting industry, the Technical Procedures Committee (TPC) of the IES proceeded to develop appropriate tests for use in rating LED product longevity. The initial need was a measure of the basic lumen degradation of LED source components identified by a module, package, or array of diodes and this came in the form of LM-80. Importantly, LM-80 only specifies how to measure lumen depreciation to a minimum of 6000 hours (but recommends testing to 10,000 hours or longer). LM-80 stops short of using that data to estimate any depreciation after that, which is where TM-21 comes in. The TM-21 working group (WG) as part of the IES TPC was formed to develop the lumen depreciation projection method and spent over three years exploring many options. The WG evaluated various projection options starting with an analysis of various mathematical, engineering-based models to provide effective depreciation fit and a useful projection method. Next, the WG analyzed LED lumen maintenance behavior using over 40 sets of LM-80-08 test data (20 sets with 10,000 hours or more) collected from four major LED manufacturers. The working group also examined the accuracy of proposed projections using various proposed models and LM-80 data that extended up to 15,000 hours.

Richman, Eric E.

2011-11-18T23:59:59.000Z

284

Development of Advanced LED Phosphors by Spray-based Processes for Solid State Lighting  

SciTech Connect

The overarching goal of the project was to develop luminescent materials using aerosol processes for making improved LED devices for solid state lighting. In essence this means improving white light emitting phosphor based LEDs by improvement of the phosphor and phosphor layer. The structure of these types of light sources, displayed in Figure 1, comprises of a blue or UV LED under a phosphor layer that converts the blue or UV light to a broad visible (white) light. Traditionally, this is done with a blue emitting diode combined with a blue absorbing, broadly yellow emitting phosphor such as Y{sub 3}Al{sub 5}O{sub 12}:Ce (YAG). A similar result may be achieved by combining a UV emitting diode and at least three different UV absorbing phosphors: red, green, and blue emitting. These emitted colors mix to make white light. The efficiency of these LEDs is based on the combined efficiency of the LED, phosphor, and the interaction between the two. The Cabot SSL project attempted to improve the over all efficiency of the LED light source be improving the efficiency of the phosphor and the interaction between the LED light and the phosphor. Cabot's spray based process for producing phosphor powders is able to improve the brightness of the powder itself by increasing the activator (the species that emits the light) concentration without adverse quenching effects compared to conventional synthesis. This will allow less phosphor powder to be used, and will decrease the cost of the light source; thus lowering the barrier of entry to the lighting market. Cabot's process also allows for chemical flexibility of the phosphor particles, which may result in tunable emission spectra and so light sources with improved color rendering. Another benefit of Cabot's process is the resulting spherical morphology of the particles. Less light scattering results when spherical particles are used in the phosphor layer (Figure 1) compared to when conventional, irregular shaped phosphor particles are used. This spherical morphology will result in better light extraction and so an improvement of efficiency in the overall device. Cabot is a 2.5 billion dollar company that makes specialized materials using propriety spray based technologies. It is a core competency of Cabot's to exploit the spray based technology and resulting material/morphology advantages. Once a business opportunity is clearly identified, Cabot is positioned to increase the scale of the production to meet opportunity's need. Cabot has demonstrated the capability to make spherical morphology micron-sized phosphor powders by spray based routes for PDP and CRT applications, but the value proposition is still unproven for LED applications. Cabot believes that the improvements in phosphor powders yielded by their process will result in a commercial advantage over existing technologies. Through the SSL project, Cabot has produced a number of different compositions in a spherical morphology that may be useful for solid state lights, as well as demonstrated processes that are able to produce particles from 10 nanometers to 3 micrometers. Towards the end of the project we demonstrated that our process produces YAG:Ce powder that has both higher internal quantum efficiency (0.6 compared to 0.45) and external quantum efficiency (0.85 compared to 0.6) than the commercial standard (see section 3.4.4.3). We, however, only produced these highly bright materials in research and development quantities, and were never able to produce high quantum efficiency materials in a reproducible manner at a commercial scale.

Cabot Corporation

2007-09-30T23:59:59.000Z

285

LEDS Collaboration in Action Workshop Biography | Open Energy Information  

Open Energy Info (EERE)

LEDS Collaboration in Action Workshop Biography LEDS Collaboration in Action Workshop Biography Jump to: navigation, search LEDSGP Logo.png Advancing climate-resilient low emission development around the world Home About Tools Expert Assistance Events Publications Join Us ACDS Workshop Participant Pack Agenda Accommodations Participants Location Arrival Form Open Space Sessions Speakers Presentations Links Contact Us Speakers ListofBios2.pdf Powered by OpenEI ledsgp.org is built on the same platform as the popular Wikipedia site. Like Wikipedia, it is a "wiki" or website developed collaboratively by a community of users. Thanks to our unique relationship with OpenEI.org, you can add or edit most content on ledsgp.org. For more information about this unique collaboration, contact us. View or edit this page on OpenEI.org.

286

LEDS Collaboration in Action Workshop Accommodations | Open Energy  

Open Energy Info (EERE)

LEDS Collaboration in Action Workshop Accommodations LEDS Collaboration in Action Workshop Accommodations Jump to: navigation, search LEDSGP Logo.png Advancing climate-resilient low emission development around the world Home About Tools Expert Assistance Events Publications Join Us ACDS Workshop Participant Pack Agenda Accommodations Participants Location Arrival Form Open Space Sessions Speakers Presentations Links Contact Us Accommodations Accommodation will be provided free of charge for the evenings of Wednesday 21st and Thursday 22nd of March. All meals from Wednesday 21st (lunch time) through Friday 23rd (lunchtime) will be included free of charge. Powered by OpenEI ledsgp.org is built on the same platform as the popular Wikipedia site. Like Wikipedia, it is a "wiki" or website developed collaboratively by a

287

Information Resources: LED Replacements for Linear Fluorescent Lamps  

NLE Websites -- All DOE Office Websites (Extended Search)

Replacements for Linear Fluorescent Lamps Webcast Replacements for Linear Fluorescent Lamps Webcast 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 Facts-listed products as well as products evaluated in the latest CALiPER reports. Eric Richman, also of PNNL, reported on a recently completed GATEWAY demonstration project, in which LED and fluorescent lamps were installed in a variety of recessed troffer luminaires for comparison in an office environment. The presentation concluded with a discussion of specifications listed in a newly updated technology fact sheet. View presentation slides View the text-alternative version View the webcast (WMV 16 MB) Download Windows Media Player

288

LEDS Collaboration in Action Workshop Open Space Sessions | Open Energy  

Open Energy Info (EERE)

LEDS Collaboration in Action Workshop Open Space Sessions LEDS Collaboration in Action Workshop Open Space Sessions Jump to: navigation, search LEDSGP Logo.png Advancing climate-resilient low emission development around the world Home About Tools Expert Assistance Events Publications Join Us ACDS Workshop Participant Pack Agenda Accommodations Participants Location Arrival Form Open Space Sessions Speakers Presentations Links Contact Us Open Space Sessions OpenSpace.pdf Powered by OpenEI ledsgp.org is built on the same platform as the popular Wikipedia site. Like Wikipedia, it is a "wiki" or website developed collaboratively by a community of users. Thanks to our unique relationship with OpenEI.org, you can add or edit most content on ledsgp.org. For more information about this unique collaboration, contact us. View or edit this page on OpenEI.org.

289

LEDS Collaboration in Action Workshop Links | Open Energy Information  

Open Energy Info (EERE)

LEDS Collaboration in Action Workshop Links LEDS Collaboration in Action Workshop Links Jump to: navigation, search LEDSGP Logo.png Advancing climate-resilient low emission development around the world Home About Tools Expert Assistance Events Publications Join Us ACDS Workshop Participant Pack Agenda Accommodations Participants Location Arrival Form Open Space Sessions Speakers Presentations Links Contact Us Links Rio+20 Latimer Place Powered by OpenEI ledsgp.org is built on the same platform as the popular Wikipedia site. Like Wikipedia, it is a "wiki" or website developed collaboratively by a community of users. Thanks to our unique relationship with OpenEI.org, you can add or edit most content on ledsgp.org. For more information about this unique collaboration, contact us. View or edit this page on OpenEI.org.

290

LEDS Collaboration in Action Workshop Arrival Form | Open Energy  

Open Energy Info (EERE)

LEDS Collaboration in Action Workshop Arrival Form LEDS Collaboration in Action Workshop Arrival Form Jump to: navigation, search LEDSGP Logo.png Advancing climate-resilient low emission development around the world Home About Tools Expert Assistance Events Publications Join Us ACDS Workshop Participant Pack Agenda Accommodations Participants Location Arrival Form Open Space Sessions Speakers Presentations Links Contact Us Arrival Form Please send in your arrival forms to liz.ainslie@ashridge.org.uk as soon as possible so we can ensure that all proper arrangements are made. If you have any troubles when you arrive in London please call Caroline Spencer +44 (0) 77 2424 3140 at or Liz Ainslie at +44 (0)1442 841405. ArrivalForm.pdf Powered by OpenEI ledsgp.org is built on the same platform as the popular Wikipedia site. Like Wikipedia, it is a "wiki" or website developed collaboratively by a

291

Charge Management for Gravitational Wave Observatories using UV LEDs  

E-Print Network (OSTI)

Accumulation of electrical charge on the end mirrors of gravitational wave observatories, such as the space-based LISA mission and ground-based LIGO detectors, can become a source of noise limiting the sensitivity of such detectors through electronic couplings to nearby surfaces. Torsion balances provide an ideal means for testing gravitational wave technologies due to their high sensitivity to small forces. Our torsion pendulum apparatus consists of a movable Au-coated Cu plate brought near a Au-coated Si plate pendulum suspended from a non-conducting quartz fiber. A UV LED located near the pendulum photoejects electrons from the surface, and a UV LED driven electron gun directs photoelectrons towards the pendulum surface. We have demonstrated both charging and discharging of the pendulum with equivalent charging rates of $\\sim

Pollack, S E; Schlamminger, S; Hagedorn, C A; Gundlach, J H

2009-01-01T23:59:59.000Z

292

LEDS Collaboration in Action Workshop Contact Us | Open Energy Information  

Open Energy Info (EERE)

source source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Page Edit History Facebook icon Twitter icon » LEDS Collaboration in Action Workshop Contact Us Jump to: navigation, search LEDSGP Logo.png Advancing climate-resilient low emission development around the world Home About Tools Expert Assistance Events Publications Join Us ACDS Workshop Participant Pack Agenda Accommodations Participants Location Arrival Form Open Space Sessions Speakers Presentations Links Contact Us Contact Us For any questions please contact: LEDS Global Partnership Secretariat U.S. National Renewable Energy Laboratory Sadie.Cox@nrel.gov +1 303 384 7391 Powered by OpenEI ledsgp.org is built on the same platform as the popular Wikipedia site.

293

Demonstrating LED and Fiber Optic Lighting in Commissary Applications  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Demonstrating LED and Fiber Optic Demonstrating LED and Fiber Optic Lighting in Commissary Applications Joseph Konrade Energy Technology Program Specialist Federal Energy Management Program 2 GOAL OF THE PROJECT * Promote New Lighting Technology * Document Energy Savings * Duplicate the technology * Expand Alternative Financing Opportunities * Include Lighting Technology in Government Projects within Utility Service Territory 3 History * FEMP sponsored E4 audits * Audit designed to review Utility Cost, Operations and Maintenance, New Technology Application * 3 Defense Commissary Agency (DeCA) received services under the agreement with DOE * Fort George G Meade pays a high electricity rate Electricity cost $0.171/kWh (PWC sub-metered rate) * Commissary was previously unmetered - Meter installed during installation of lighting project. New meter showing higher

294

FACT SHEET: SOLAR AND LED ENERGY ACCESS PROGRAM  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

1 FACT SHEET: SOLAR AND LED ENERGY ACCESS PROGRAM At the Clean Energy Ministerial in Washington, D.C. on July 19 th and 20 th , leaders from the International Finance Corporation (IFC), Italy, and the United States launched a new program to bring clean, high-quality energy services to the 1.6 billion people current lacking access to modern energy - simultaneously alleviating poverty, improving human health, and reducing emissions of greenhouse gases.

295

Demonstration Assessment of LED Roadway Lighting: Philadelphia, PA  

Science Conference Proceedings (OSTI)

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.

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

2012-09-01T23:59:59.000Z

296

Using LED Lighting for Ubiquitous Indoor Wireless Networking  

E-Print Network (OSTI)

Abstract—Wireless networking is currently dominated by radio frequency (RF) techniques. However, the soon-to-be ubiquity of LED-based lighting motivated by significant energy savings provides an opportunistic deployment of widespread free-space optical (FSO) communications. LEDbased network transceivers have a variety of competitive advantages over RF including high bandwidth density, security, energy consumption, and aesthetics. They also use a highly reusable unregulated part of the spectrum (visible light). In this paper we describe results from a pilot project to demonstrate the viability of an optical free-space visible light transceiver as a basis for indoor wireless networking. Inexpensive, commercial, off-the shelf LEDs and photodiodes we used to construct two prototypes; a simplex channel as expected as a component of an asymmetric/hybrid RF-FSO system, and a full-duplex channel demonstrating the ability to isolate multiple channels. On— off keying (OOK) was applied without observable flicker in the target modulation ranges. Results indicate the viability of creating inexpensive FSO transceivers that might be embedded in commercial lighting products to support ceiling-to-floor distances of approximately 3m. Index Terms—Wireless networking, indoor communications, free-space optical communications, visible light LED, modulation, OOK, FSO. 1 I.

T. D. C. Little; P. Dib; K. Shah; N. Barraford; B. Gallagher

2008-01-01T23:59:59.000Z

297

Abbreviated epitaxial growth mode (AGM) method for reducing cost and improving quality of LEDs and lasers  

DOE Patents (OSTI)

The use of an abbreviated GaN growth mode on nano-patterned AGOG sapphire substrates, which utilizes a process of using 15 nm low temperature GaN buffer and bypassing etch-back and recovery processes during epitaxy, enables the growth of high-quality GaN template on nano-patterned AGOG sapphire. The GaN template grown on nano-patterned AGOG sapphire by employing abbreviated growth mode has two orders of magnitude lower threading dislocation density than that of conventional GaN template grown on planar sapphire. The use of abbreviated growth mode also leads to significant reduction in cost of the epitaxy. The growths and characteristics of InGaN quantum wells (QWs) light emitting diodes (LEDs) on both templates were compared. The InGaN QWs LEDs grown on the nano-patterned AGOG sapphire demonstrated at least a 24% enhancement of output power enhancement over that of LEDs grown on conventional GaN templates.

Tansu, Nelson; Chan, Helen M; Vinci, Richard P; Ee, Yik-Khoon; Biser, Jeffrey

2013-09-24T23:59:59.000Z

298

S 1.1.1 Highly Polarized Non-polar GaN-based LED Unpolarized LED  

E-Print Network (OSTI)

Features: · Energy Efficient LED · UV light consumed within film · Low Profile- Modular · Light Extraction-polar Electric field engineering Problem Impact S1.2.2 #12;1.0 1.5 2.0 2.5 2 4 6 8 10 12 Extractioneffiencyratio ·Reliability #12;· Filtering · Packetizing T1.2.1 Software Defined Visible Light Communication Michael Rahaim

LĂĽ, James Jian-Qiang

299

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

Science Conference Proceedings (OSTI)

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.

Scholand, Michael; Dillon, Heather E.

2012-05-01T23:59:59.000Z

300

Feedback-Controlled LED Photobioreactor for Photophysiological Studies of Cyanobacteria  

SciTech Connect

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.

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

2013-04-09T23:59:59.000Z

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


301

Enhancing Capacity for Low Emission Development Strategies (EC-LEDS)  

Open Energy Info (EERE)

Enhancing Capacity for Low Emission Development Strategies Program Enhancing Capacity for Low Emission Development Strategies Program Agency/Company /Organization United States Agency for International Development, United States Environmental Protection Agency, United States Department of Energy, United States Department of Agriculture, United States Department of State Sector Energy, Land Topics Low emission development planning, -LEDS Program Start 2010 Program End 2014 Country Albania, Bangladesh, Cambodia, Colombia, Costa Rica, Gabon, Georgia, Guatemala, Indonesia, Jamaica, Kazakhstan, Kenya, Republic of Macedonia, Malawi, Malaysia, Mexico, Moldova, Peru, Philippines, Serbia, South Africa, Thailand, Ukraine, Vietnam, Zambia UN Region Southern Asia References Enhancing Capacity for Low Emission Development Strategies Program[1]

302

MRS Photodiode, LED and extruded scintillator performance in magnetic field  

SciTech Connect

The experimental results on the performance of the MRS (Metal/Resistor/Semiconductor) photodiode in the strong magnetic field of 4.4T, and the possible impact of the quench of the magnet at 4.5T on sensor's operation are reported. In addition, the experimental results on the performance of the extruded scintillator and WLS fiber, and various LEDs in the magnetic fields of 1.8T and 2.3T respectively, are detailed. The measurement method used is being described.

Beznosko, D.; Blazey, G.; Dyshkant, A.; Francis, K.; Kubik, D.; Rykalin, V.; Zutshi, V.; /Northern Illinois U.

2005-05-01T23:59:59.000Z

303

The Knowledge-Led Accumulation Regime: A Theory of Contemporary Capitalism  

E-Print Network (OSTI)

The Knowledge-Led Accumulation Regime: A Theory ofBerkeley The Knowledge-Led Accumulation Regime: A Theory ofKorea) Abstract The knowledge-led accumulation regime (KLAR)

Kim, Hyungkee

2007-01-01T23:59:59.000Z

304

INVESTIGATION OF OPTICAL STRUCTURES FOR ENHANCING THE LIGHT EXTRACTION FICIENCY OF WHITE LED.  

E-Print Network (OSTI)

??Recently, phosphor-conversion has been widely used in producing white light-emitting diodes (LEDs). In phosphor-converted (pc) LEDs, the blue LED chip is surrounded by the phosphor… (more)

Chen, Wei-Liang

2009-01-01T23:59:59.000Z

305

Observed Minimum Illuminance Threshold for Night Market Vendors in Kenya who use LED Lamps  

E-Print Network (OSTI)

the economics of fuel-based and LED lighting technology fordata logger equipped rechargeable LED lamps, monitoring theadoption of the LED lamps, and a follow-up survey. 1 Figure

Johnstone, Peter

2009-01-01T23:59:59.000Z

306

Assessing the Performance of 5mm White LED Light Sources for Developing-Country Applications  

E-Print Network (OSTI)

Stewart Craine collected the LED samples in Shenzen, China4. Variation in efficacy of LEDs tested. Figure 5. Figure 6.Performance of 5mm White LED Light Sources for Developing-

Mills, Evan

2007-01-01T23:59:59.000Z

307

A Comparison of Infrared Light Emitting Diodes (IR-LED) versus Infrared  

E-Print Network (OSTI)

B. Characteristics of a typical IR LED analogous to the typeLight Emitting Diodes (IR-LED) versus Infrared Helium-Neon (light emitting diode (IR-LED) to quantitatively measure fuel

Girard, James W.; Bogin, Gregory E; Mack, John Hunter; Chen, J-Y; Dibble, Rober W

2005-01-01T23:59:59.000Z

308

Thermal Decomposition of Bulk K-CoMoSx Mixed Alcohol Catalyst Precursors and Effects on Catalyst Morphology and Performance  

Science Conference Proceedings (OSTI)

Cobalt molybdenum sulfide-type mixed alcohol catalysts were synthesized via calcination of precipitated bulk sulfides and studied with temperature programmed decomposition analysis. Precursors containing aqueous potassium were also considered. Precipitates thermally decomposed in unique events which released ammonia, carbon dioxide, and sulfur. Higher temperature treatments led to more crystalline and less active catalysts in general with ethanol productivity falling from 203 to 97 g (kg cat){sup -1} h{sup -1} when the calcination temperature was increased from 375 to 500 C. The addition of potassium to the precursor led to materials with crystalline potassium sulfides and good catalytic performance. In general, less potassium was required to promote alcohol selectivity when added before calcination. At calcination temperatures above 350 C, segregated cobalt sulfides were observed, suggesting that thermally decomposed sulfide precursors may contain a mixture of molybdenum and cobalt sulfides instead of a dispersed CoMoS type of material. When dimethyl disulfide was fed to the precursor during calcination, crystalline cobalt sulfides were not detected, suggesting an important role of free sulfur during decomposition.

Menart, M. J.; Hensley, J. E.; Costelow, K. E.

2012-09-26T23:59:59.000Z

309

Charge Management for Gravitational Wave Observatories using UV LEDs  

E-Print Network (OSTI)

Accumulation of electrical charge on the end mirrors of gravitational wave observatories, such as the space-based LISA mission and ground-based LIGO detectors, can become a source of noise limiting the sensitivity of such detectors through electronic couplings to nearby surfaces. Torsion balances provide an ideal means for testing gravitational wave technologies due to their high sensitivity to small forces. Our torsion pendulum apparatus consists of a movable Au-coated Cu plate brought near a Au-coated Si plate pendulum suspended from a non-conducting quartz fiber. A UV LED located near the pendulum photoejects electrons from the surface, and a UV LED driven electron gun directs photoelectrons towards the pendulum surface. We have demonstrated both charging and discharging of the pendulum with equivalent charging rates of $\\sim$$10^5 e/\\mathrm{s}$, as well as spectral measurements of the pendulum charge resulting in a white noise level equivalent to $3\\times10^5 e/\\sqrt{Hz}$.

S. E. Pollack; M. D. Turner; S. Schlamminger; C. A. Hagedorn; J. H. Gundlach

2009-12-09T23:59:59.000Z

310

LEDs Based on AlInP Alloys - Energy Innovation Portal  

While reasonable red and blue LEDs are available for this scheme, availability of a good green LED poses a significant technological challenge. For over a decade, ...

311

SMD Type Metallic Reflection Cup LED Component on the Application of Backlight Module.  

E-Print Network (OSTI)

??Nowadays, using the LED as backlight module's light source becomes generalization gradually, and the application of LED light source develops from the liquid crystal display… (more)

Wang, Hui-chi

2009-01-01T23:59:59.000Z

312

Secretary Chu Announces $38 Million for 42 University-Led Nuclear...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

38 Million for 42 University-Led Nuclear Research and Development Projects Secretary Chu Announces 38 Million for 42 University-Led Nuclear Research and Development Projects May...

313

Mixed Waste Management Guidelines  

Science Conference Proceedings (OSTI)

The management of mixed waste presents serious challenges to nuclear utilities. Regulatory and practical predicaments make compliance with the letter of all applicable regulations extremely difficult. Utility experts developed these guidelines to identify opportunities for improving work practices and regulatory compliance while minimizing any potential adverse impacts of mixed waste management.

1994-12-31T23:59:59.000Z

314

SSA Mixed Canopy Site  

NLE Websites -- All DOE Office Websites (Extended Search)

Mixed Canopy Site (SSA-Mix) Mixed Canopy Site (SSA-Mix) The TE canopy tower The mixed trees Terrestrial Ecology canopy access tower at the SSA mixed coniferous/deciduous site. A picture taken looking down from the TE canopy access tower at the SSA mixed auxiliary site, showing the aspen and spruce canopies. Back to the BOREAS Photo Page Index Other Sites: NSA Photos ||NSA-BP Photos | NSA-Fen Photos | NSA-OA Photos | NSA-OBS Photos | NSA-OJP Photos | NSA-UBS Photos | NSA-YJP Photos | NSA-Ops Photos SSA Photos || SSA-Airport Photos | SSA-Fen Photos | SSA-Mix Photos | SSA-OA Photos | SSA-OBS Photos | SSA-OJP Photos | SSA-YA Photos | SSA-YJP Photos | SSA-Ops Photos | ORNL DAAC Home || ORNL Home || NASA || Privacy, Security, Notices || Data Citation || Rate Us || Help | User Services - Tel: +1 (865) 241-3952 or E-mail: uso@daac.ornl.gov

315

LEDS Collaboration in Action Workshop Participant Pack | Open Energy  

Open Energy Info (EERE)

source source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Page Edit History Facebook icon Twitter icon » LEDS Collaboration in Action Workshop Participant Pack Jump to: navigation, search LEDSGP Logo.png Advancing climate-resilient low emission development around the world Home About Tools Expert Assistance Events Publications Join Us ACDS Workshop Participant Pack Agenda Accommodations Participants Location Arrival Form Open Space Sessions Speakers Presentations Links Contact Us Participant Pack Pack.pdf Powered by OpenEI ledsgp.org is built on the same platform as the popular Wikipedia site. Like Wikipedia, it is a "wiki" or website developed collaboratively by a community of users. Thanks to our unique relationship with OpenEI.org, you

316

Oppenheimer&Groves : The duality that led to Trinity /.  

SciTech Connect

The alliance of J. Robert Oppenheimer, scientist, and Leslie R. Groves, military leader, is often interpreted as the classic example of the clash between the academic mind and the military style. Evidence suggests, instead, that it was a collaboration that led to the dawn of the nuclear age. Instead of a clash, it was collaboration and an implosion of the diverse talents needed for the success of this project. Discussion of these flawed and fascinating individuals still ignites controversy today. This presentation will explore the backgrounds and personalities of these two men and their work together to accomplish their mission. Was the aftermath inevitable, given a relationship based on respect, but perhaps not trust? The genesis of the modern military-industrial complex rested on the genius of these two men, though they personify two distinct American sub-cultures. What lessons can be drawn from their wartime and post-war relationship? What analogies can be drawn for current American values?

Connaughton, T. G. (Theresa G.); Smith, S. E. (Sharon E.)

2001-01-01T23:59:59.000Z

317

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

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Holiday Lights: Festive, Safe, and Efficient! 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 stepladder, all in anticipation of one glorious moment: Dad's annual trip to the emergency room. I kid (and sincerely hope that's not your yearly ritual), but in addition to safety when hanging your lights this year, I hope you'll think about something else: efficiency.

318

LEDS Collaboration in Action Workshop Agenda | Open Energy Information  

Open Energy Info (EERE)

source source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Page Edit History Facebook icon Twitter icon » LEDS Collaboration in Action Workshop Agenda Jump to: navigation, search LEDSGP Logo.png Advancing climate-resilient low emission development around the world Home About Tools Expert Assistance Events Publications Join Us ACDS Workshop Participant Pack Agenda Accommodations Participants Location Arrival Form Open Space Sessions Speakers Presentations Links Contact Us Agenda Workshop Agenda FinalAgenda.pdf Overview Agenda OverviewAgenda.pdf Powered by OpenEI ledsgp.org is built on the same platform as the popular Wikipedia site. Like Wikipedia, it is a "wiki" or website developed collaboratively by a

319

LEDS Collaboration in Action Workshop Location | Open Energy Information  

Open Energy Info (EERE)

source source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Page Edit History Facebook icon Twitter icon » LEDS Collaboration in Action Workshop Location Jump to: navigation, search LEDSGP Logo.png Advancing climate-resilient low emission development around the world Home About Tools Expert Assistance Events Publications Join Us ACDS Workshop Participant Pack Agenda Accommodations Participants Location Arrival Form Open Space Sessions Speakers Presentations Links Contact Us Location Sitemap.jpg Latimer Place Latimer, Chesham, Buckinghamshire HP5 1UG Telephone: (01494) 545500 Fax: (01494) 762473 Email: latimer@deverevenues.co.uk The Centre is conveniently situated just off the M25, yet in a peaceful

320

LEDS Collaboration in Action Workshop Attendee List | Open Energy  

Open Energy Info (EERE)

Attendee List Attendee List (Redirected from LEDS Collaboration in Action Workshop Participating Countries) Jump to: navigation, search LEDSGP Logo.png Advancing climate-resilient low emission development around the world Home About Tools Expert Assistance Events Publications Join Us ACDS Workshop Participant Pack Agenda Accommodations Participants Location Arrival Form Open Space Sessions Speakers Presentations Links Contact Us Participants ListofAttendeesWorkshopfinal.pdf Powered by OpenEI ledsgp.org is built on the same platform as the popular Wikipedia site. Like Wikipedia, it is a "wiki" or website developed collaboratively by a community of users. Thanks to our unique relationship with OpenEI.org, you can add or edit most content on ledsgp.org. For more information about this

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


321

ADVANCED MIXING MODELS  

Science Conference Proceedings (OSTI)

The process of recovering and processing High Level Waste (HLW) the waste in storage tanks at the Savannah River Site (SRS) typically requires mixing the contents of the tank with one to four mixers (pumps) located within the tank. The typical criteria to establish a mixed condition in a tank are based on the number of pumps in operation and the time duration of operation. To ensure that a mixed condition is achieved, operating times are typically set conservatively long. This approach results in high operational costs because of the long mixing times and high maintenance and repair costs for the same reason. A significant reduction in both of these costs might be realized by reducing the required mixing time based on calculating a reliable indicator of mixing with a suitably validated computer code. The focus of the present work is to establish mixing criteria applicable to miscible fluids, with an ultimate goal of addressing waste processing in HLW tanks at SRS and quantifying the mixing time required to suspend sludge particles with the submersible jet pump. A single-phase computational fluid dynamics (CFD) approach was taken for the analysis of jet flow patterns with an emphasis on the velocity decay and the turbulent flow evolution for the farfield region from the pump. Literature results for a turbulent jet flow are reviewed, since the decay of the axial jet velocity and the evolution of the jet flow patterns are important phenomena affecting sludge suspension and mixing operations. The work described in this report suggests a basis for further development of the theory leading to the identified mixing indicators, with benchmark analyses demonstrating their consistency with widely accepted correlations. Although the indicators are somewhat generic in nature, they are applied to Savannah River Site (SRS) waste tanks to provide a better, physically based estimate of the required mixing time. Waste storage tanks at SRS contain settled sludge which varies in height from zero to 10 ft. The sludge has been characterized and modeled as micron-sized solids, typically 1 to 5 microns, at weight fractions as high as 20 to 30 wt%, specific gravities to 1.4, and viscosities up to 64 cp during motion. The sludge is suspended and mixed through the use of submersible slurry jet pumps. To suspend settled sludge, water is added to the tank as a slurry medium and stirred with the jet pump. Although there is considerable technical literature on mixing and solid suspension in agitated tanks, very little literature has been published on jet mixing in a large-scale tank. One of the main objectives in the waste processing is to provide feed of a uniform slurry composition at a certain weight percentage (e.g. typically {approx}13 wt% at SRS) over an extended period of time. In preparation of the sludge for slurrying, several important questions have been raised with regard to sludge suspension and mixing of the solid suspension in the bulk of the tank: (1) How much time is required to prepare a slurry with a uniform solid composition? (2) How long will it take to suspend and mix the sludge for uniform composition in any particular waste tank? (3) What are good mixing indicators to answer the questions concerning sludge mixing stated above in a general fashion applicable to any waste tank/slurry pump geometry and fluid/sludge combination?

Lee, S.; Dimenna, R.; Tamburello, D.

2011-02-14T23:59:59.000Z

322

Mixing method and apparatus  

DOE Patents (OSTI)

Method of mixing particulate materials comprising contacting a primary source and a secondary source thereof whereby resulting mixture ensues; preferably at least one of the two sources has enough motion to insure good mixing and the particulate materials may be heat treated if desired. Apparatus for such mixing comprising an inlet for a primary source, a reactor communicating therewith, a feeding means for supplying a secondary source to the reactor, and an inlet for the secondary source. Feeding means is preferably adapted to supply fluidized materials.

Green, Norman W. (Redwood City, CA)

1982-06-15T23:59:59.000Z

323

Guidelines for mixed waste minimization  

SciTech Connect

Currently, there is no commercial mixed waste disposal available in the United States. Storage and treatment for commercial mixed waste is limited. Host States and compacts region officials are encouraging their mixed waste generators to minimize their mixed wastes because of management limitations. This document provides a guide to mixed waste minimization.

Owens, C.

1992-02-01T23:59:59.000Z

324

Lateral Mixing in the Pycnocline by Baroclinic Mixed Layer Eddies  

Science Conference Proceedings (OSTI)

Using a process study model, the effect of mixed layer submesoscale instabilities on the lateral mixing of passive tracers in the pycnocline is explored. Mixed layer eddies that are generated from the baroclinic instability of a front within the ...

Gualtiero Badin; Amit Tandon; Amala Mahadevan

2011-11-01T23:59:59.000Z

325

Revolutionary Method for Increasing the Efficiency of White Light Quantum Dot LEDs  

SciTech Connect

Covering a light-emitting diode (LED) with quantum dots (QDs) can produce a broad spectrum of white light. However, current techniques for applying QDs to LEDs suffer from a high density of defects and a non-uniform distribution of QDs, which respec-tively diminish the efficiency and quality of emitted light. Oak Ridge National Laboratory (ORNL) has the unique capability to thermally anneal QD structures at extremely high power densities for very short durations. This process, called pulse thermal proc-essing (PTP), reduces the number of point defects while main-taining the size and shape of the original QD nanostructure. Therefore, the efficiency of the QD wavelength conversion layer is improved without altering the emission spectrum defined by the size distribution of the quantum dot nanoparticles. The cur-rent research uses a thermal model to predict annealing tempera-tures during PTP and demonstrates up to a 300% increase in pho-toluminescence for QDs on passive substrates

Duty, Chad E [ORNL; Bennett, Charlee J C [ORNL; Sabau, Adrian S [ORNL; Jellison Jr, Gerald Earle [ORNL; Boudreaux, Philip R [ORNL; Walker, Steven C [ORNL; Ott, Ronald D [ORNL

2011-01-01T23:59:59.000Z

326

Light Emitting Diode (LED) fiducial system: Setup and operation  

SciTech Connect

Streak cameras, either electronic or rotating mirror, are common diagnostic tools used to explore very fast phenomena. Often they are used to precisely time events or durations, and in most cases, it is important to have quality time marks on the film record. Many methods have been used to introduce time marks onto the film. Exploding bridge wires are frequently used, but they light up slowly and are difficult to read with consistent accuracy. It is also difficult to put more than a few bridge wires in the view of a camera slit, so there are only a few timing marks written to the film. In some cases the time scale on the film must be interpolated over long distances, creating a significant loss of accuracy. Interpolation is especially troublesome with those cameras that have a nonlinear sweep rate. Spark gaps located on the camera slit turn on a bit faster, but suffer from the same interpolation induced errors. A series of short duration laser pulses, accurately timed and introduced along the edges of the film, is a very fine solution. The problem with such a laser fiducial system is that the lasers are very expensive and difficult to maintain. There has been a need for many years for an inexpensive, very bright light source that can be repetitively pulsed accurately and with short duration. Various technologies have sufficiently developed over the past few years, allowing us to build a fiducial system based on light emitting diodes (LED) for the Cordin rotating mirror streak cameras.

Muelder, S.A.

1995-01-01T23:59:59.000Z

327

Implementing and Sustaining Operator Led Energy Efficiency Improvements  

E-Print Network (OSTI)

The continuing high price of energy, difficult trading conditions and corporate commitments to meet emissions targets means that industry faces tough challenges to improve energy efficiency and reduce operating costs. The challenge is how to maximize energy savings with optimal capital investment. During the past few years, many operating companies have made good strides towards improving the energy performance of their assets by implementing energy efficiency programs. In general, these programs and initiatives have focused on relatively easy 'low hanging fruit' energy efficiency improvements - such as reducing furnace O2 levels and implementing steam trap maintenance programs. These initiatives are an important first step. However, to significantly reduce energy consumption, the site must focus on a strategic approach which involves developing, implementing and sustaining a client specific program of energy optimization. We discuss ways of sustaining energy performance through operator led initiatives as part of the structured KBC energy management process, ENgage. We present case studies from the oil refining industry, demonstrating energy savings of up to 20 percent, in which capital expenditure were kept to the bare minimum.

Hoyle, A.; Knight, N.; Rutkowski, M.

2011-01-01T23:59:59.000Z

328

Mixed Semiconductor Nanocrystal Compositions  

NLE Websites -- All DOE Office Websites (Extended Search)

Mixed Semiconductor Nanocrystal Compositions Mixed Semiconductor Nanocrystal Compositions Mixed Semiconductor Nanocrystal Compositions Composition comprising one or more energy donors and one or more energy acceptors. Available for thumbnail of Feynman Center (505) 665-9090 Email Mixed Semiconductor Nanocrystal Compositions Composition comprising one or more energy donors and one or more energy acceptors, wherein energy is transferred from the energy donor to the energy acceptor and wherein: the energy acceptor is a colloidal nanocrystal having a lower band gap energy than the energy donor; the energy donor and the energy acceptor are separated by a distance of 40 nm or less; wherein the average peak absorption energy of the acceptor is at least 20 meV greater than the average peak emission energy of the energy donor; and

329

Fuel Mix Disclosure  

Energy.gov (U.S. Department of Energy (DOE))

Hawaii requires the state’s retail electric suppliers to disclose details regarding the fuel mix of their electric generation to retail customers. Such information must be provided on customers’...

330

Mixing by ocean eddies  

E-Print Network (OSTI)

Mesoscale eddies mix and transport tracers such as heat and potential vorticity laterally in the ocean. While this transport plays an important role in the climate system, especially in the Southern Ocean, we lack a, ...

Abernathey, Ryan (Ryan Patrick)

2012-01-01T23:59:59.000Z

331

Thermal dissociation behavior and dissociation enthalpies of methane-carbon dioxide mixed hydrates  

SciTech Connect

Replacement of methane with carbon dioxide in hydrate has been proposed as a strategy for geologic sequestration of carbon dioxide (CO{sub 2}) and/or production of methane (CH{sub 4}) from natural hydrate deposits. This replacement strategy requires a better understanding of the thermodynamic characteristics of binary mixtures of CH{sub 4} and CO{sub 2} hydrate (CH{sub 4}-CO{sub 2} mixed hydrates), as well as thermophysical property changes during gas exchange. This study explores the thermal dissociation behavior and dissociation enthalpies of CH{sub 4}-CO{sub 2} mixed hydrates. We prepared CH{sub 4}-CO{sub 2} mixed hydrate samples from two different, well-defined gas mixtures. During thermal dissociation of a CH{sub 4}-CO{sub 2} mixed hydrate sample, gas samples from the head space were periodically collected and analyzed using gas chromatography. The changes in CH{sub 4}-CO{sub 2} compositions in both the vapor phase and hydrate phase during dissociation were estimated based on the gas chromatography measurements. It was found that the CO{sub 2} concentration in the vapor phase became richer during dissociation because the initial hydrate composition contained relatively more CO{sub 2} than the vapor phase. The composition change in the vapor phase during hydrate dissociation affected the dissociation pressure and temperature; the richer CO{sub 2} in the vapor phase led to a lower dissociation pressure. Furthermore, the increase in CO{sub 2} concentration in the vapor phase enriched the hydrate in CO{sub 2}. The dissociation enthalpy of the CH{sub 4}-CO{sub 2} mixed hydrate was computed by fitting the Clausius-Clapeyron equation to the pressure-temperature (PT) trace of a dissociation test. It was observed that the dissociation enthalpy of the CH{sub 4}-CO{sub 2} mixed hydrate lays between the limiting values of pure CH{sub 4} hydrate and CO{sub 2} hydrate, increasing with the CO{sub 2} fraction in the hydrate phase.

Kwon, T.H.; Kneafsey, T.J.; Rees, E.V.L.

2011-02-15T23:59:59.000Z

332

Government-led Vocational Training System and its Lessons: In case of South Korea before the IMF Economic Crisis  

E-Print Network (OSTI)

Transformation of the Government-led Vocational TrainingGovernment-led Vocational Training System and its Lessons:for adopting a government-led vocational training strategy

Ra, Young Sun

2012-01-01T23:59:59.000Z

333

Assessing the Performance of LED-Based Flashlights Available in the Kenyan Off-Grid Lighting Market  

E-Print Network (OSTI)

of emerging off-grid White-LED illumination systems, Light &Assessing the Performance of LED-Based Flashlights Availableflashlights that use LED technology are increasingly

Tracy, Jennifer

2010-01-01T23:59:59.000Z

334

A Thermopiezoelectric Mixed Variational Theorem for smart multilayered composites  

Science Conference Proceedings (OSTI)

This work extends for thermopiezoelectric media the Piezoelectric Mixed Variational Theorem (PMVT), proposed recently by the authors, by adding the transverse thermal field-temperature increment relation as a constraint via a Lagrange multiplier. The ... Keywords: Mixed variational theorem, Multilayered composites, Smart structures, Thermopiezoelectric, Variational formulations

Ayech Benjeddou; Orlando Andrianarison

2005-06-01T23:59:59.000Z

335

Event:LEDS Collaboration in Action Workshop Day 2 | Open Energy Information  

Open Energy Info (EERE)

2 2 Jump to: navigation, search Calendar.png LEDS Collaboration in Action Workshop Day 2: on 2012/03/22 Objectives â–«Bring together low carbon growth decision-makers â–«Promote South-South and North-South collaboration and exchange â–«Develop a shared vision and path forward for the LEDS GP â–«Further the discussion of high level support for LEDS coordination â–«Build capacity on LEDS-related topics of interest Event Details Name LEDS Collaboration in Action Workshop Day 2 Date 2012/03/22 Location London, United Kingdom Organizer LEDS Global Partnership Tags LEDS Global Partnership, LEDS Website Event Website Ret LikeLike UnlikeLike You like this.Sign Up to see what your friends like. rieved from "http://en.openei.org/w/index.php?title=Event:LEDS_Collaboration_in_Action_Workshop_Day_2&oldid=404506"

336

Drop Growth Due to High Supersaturation Caused by Isobaric Mixing  

Science Conference Proceedings (OSTI)

A new conceptual model is proposed for enhanced cloud droplet growth during condensation. Rapid droplet growth may occur in zones of high supersaturation resulting from isobaric mixing of saturated volumes with different temperatures. Cloud ...

Alexei V. Korolev; George A. Isaac

2000-05-01T23:59:59.000Z

337

Multisensor Estimation of Mixing Heights over a Coastal City  

Science Conference Proceedings (OSTI)

An airborne microwave temperature profiler (MTP) was deployed during the Texas 2000 Air Quality Study (TexAQS-2000) to make measurements of boundary layer thermal structure. An objective technique was developed and tested for estimating the mixed ...

John W. Nielsen-Gammon; Christina L. Powell; M. J. Mahoney; Wayne M. Angevine; Christoph Senff; Allen White; Carl Berkowitz; Christopher Doran; Kevin Knupp

2008-01-01T23:59:59.000Z

338

Vertical Transition in Transport and Mixing in Baroclinic Flows  

Science Conference Proceedings (OSTI)

Numerical simulations in multilevel baroclinic turbulence in a ?-plane channel model are discussed, focusing on the transport and mixing behavior. The temperature field in the model is relaxed toward a field consistent with a broad zonal jet with ...

M. D. Greenslade; P. H. Haynes

2008-04-01T23:59:59.000Z

339

Parameterization of Vertical Mixing in Numerical Models of Tropical Oceans  

Science Conference Proceedings (OSTI)

Measurements indicate that mixing processes are intense in the surface layers of the ocean but weak below the thermocline, except for the region below the core of the Equatorial Undercurrent where vertical temperature gradients are small and the ...

R. C. Pacanowski; S. G. H. Philander

1981-11-01T23:59:59.000Z

340

Data Assimilation Tests with an Oceanic Mixed-Layer Model  

Science Conference Proceedings (OSTI)

A data assimilation technique using a one-dimensional, ocean mixed-layer model to advance the thermal structure observations to the analysis time is tested. The effects of insertions of erroneous temperature profiles in such a model are studied ...

Russell L. Elsberry; Larry L. Warrenfelt

1982-08-01T23:59:59.000Z

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


341

Relative Humidity in Liquid, Mixed-Phase, and Ice Clouds  

Science Conference Proceedings (OSTI)

The results of in situ observations of the relative humidity in liquid, mixed, and ice clouds typically stratiform in nature and associated with mesoscale frontal systems at temperatures ?45°C < Ta < ?5°C are presented. The data were collected ...

Alexei Korolev; George A. Isaac

2006-11-01T23:59:59.000Z

342

Frontogenesis in an Advective Mixed-Layer Model  

Science Conference Proceedings (OSTI)

Through an analysis of a multi-dimensional extension of the bulk mixed layer model of Kraus and Turner (1967) it is shown how, even under spatially uniform atmospheric conditions, an initially smooth horizontal temperature gradient in the surface ...

Will P. M. de Ruijter

1983-03-01T23:59:59.000Z

343

Enhanced Diapycnal Mixing in the South China Sea  

Science Conference Proceedings (OSTI)

Profiles of current velocity, temperature, and salinity were obtained in the Internal Wave and Mixing Experiment in the South China Sea (SCS), the Luzon Strait, and the North Pacific. The observations are examined for evidence of enhanced ...

Jiwei Tian; Qingxuan Yang; Wei Zhao

2009-12-01T23:59:59.000Z

344

Entropy Generation In the Ocean by Small-Scale Mixing  

Science Conference Proceedings (OSTI)

An expression that includes salt diffusion was developed and evaluated for the rate of entropy production ? in the ocean. The evaluation was done for mixing events produced by turbulent overturns and double diffusion. Temperature and salinity ...

M. C. Gregg

1984-04-01T23:59:59.000Z

345

ADVANCED MIXING MODELS  

SciTech Connect

The process of recovering the waste in storage tanks at the Savannah River Site (SRS) typically requires mixing the contents of the tank with one to four dual-nozzle jet mixers located within the tank. The typical criteria to establish a mixed condition in a tank are based on the number of pumps in operation and the time duration of operation. To ensure that a mixed condition is achieved, operating times are set conservatively long. This approach results in high operational costs because of the long mixing times and high maintenance and repair costs for the same reason. A significant reduction in both of these costs might be realized by reducing the required mixing time based on calculating a reliable indicator of mixing with a suitably validated computer code. The work described in this report establishes the basis for further development of the theory leading to the identified mixing indicators, the benchmark analyses demonstrating their consistency with widely accepted correlations, and the application of those indicators to SRS waste tanks to provide a better, physically based estimate of the required mixing time. Waste storage tanks at SRS contain settled sludge which varies in height from zero to 10 ft. The sludge has been characterized and modeled as micron-sized solids, typically 1 to 5 microns, at weight fractions as high as 20 to 30 wt%, specific gravities to 1.4, and viscosities up to 64 cp during motion. The sludge is suspended and mixed through the use of submersible slurry jet pumps. To suspend settled sludge, water is added to the tank as a slurry medium and stirred with the jet pump. Although there is considerable technical literature on mixing and solid suspension in agitated tanks, very little literature has been published on jet mixing in a large-scale tank. If shorter mixing times can be shown to support Defense Waste Processing Facility (DWPF) or other feed requirements, longer pump lifetimes can be achieved with associated operational cost and schedule savings. The focus of the present work is to establish mixing criteria associated with the waste processing at SRS and to quantify the mixing time required to suspend sludge particles with the submersible jet pump. Literature results for a turbulent jet flow are reviewed briefly, since the decay of the axial jet velocity and the evolution of the jet flow patterns are important phenomena affecting sludge suspension and mixing operations. One of the main objectives in the waste processing is to provide the DWPF a uniform slurry composition at a certain weight percentage (typically {approx}13 wt%) over an extended period of time. In preparation of the sludge for slurrying to DWPF, several important questions have been raised with regard to sludge suspension and mixing of the solid suspension in the bulk of the tank: (1) How much time is required to prepare a slurry with a uniform solid composition for DWPF? (2) How long will it take to suspend and mix the sludge for uniform composition in any particular waste tank? (3) What are good mixing indicators to answer the questions concerning sludge mixing stated above in a general fashion applicable to any waste tank/slurry pump geometry and fluid/sludge combination? Grenville and Tilton (1996) investigated the mixing process by giving a pulse of tracer (electrolyte) through the submersible jet nozzle and by monitoring the conductivity at three locations within the cylindrical tank. They proposed that the mixing process was controlled by the turbulent kinetic energy dissipation rate in the region far away from the jet entrance. They took the energy dissipation rates in the regions remote from the nozzle to be proportional to jet velocity and jet diameter at that location. The reduction in the jet velocity was taken to be proportional to the nozzle velocity and distance from the nozzle. Based on their analysis, a correlation was proposed. The proposed correlation was shown to be valid over a wide range of Reynolds numbers (50,000 to 300,000) with a relative standard deviation of {+-} 11.83%. An improved correlat

Lee, S; Richard Dimenna, R; David Tamburello, D

2008-11-13T23:59:59.000Z

346

Junction temperature measurement of light emitting diode by electroluminescence  

Science Conference Proceedings (OSTI)

Junction temperature (JT) is a key parameter of the performance and lifetime of light emitting diodes(LEDs). In this paper

S. M. He; X. D. Luo; B. Zhang; L. Fu; L. W. Cheng; J. B. Wang; W. Lu

2011-01-01T23:59:59.000Z

347

Mixed waste: Proceedings  

SciTech Connect

This volume contains the peer-reviewed and edited versions of papers submitted for presentation a the Second International Mixed Waste Symposium. Following the tradition of the First International Mixed Waste Symposium, these proceedings were prepared in advance of the meeting for distribution to participants. The symposium was organized by the Mixed Waste Committee of the American Society of Mechanical Engineers. The topics discussed at the symposium include: stabilization technologies, alternative treatment technologies, regulatory issues, vitrification technologies, characterization of wastes, thermal technologies, laboratory and analytical issues, waste storage and disposal, organic treatment technologies, waste minimization, packaging and transportation, treatment of mercury contaminated wastes and bioprocessing, and environmental restoration. Individual abstracts are catalogued separately for the data base.

Moghissi, A.A.; Blauvelt, R.K.; Benda, G.A.; Rothermich, N.E. [eds.] [Temple Univ., Philadelphia, PA (United States). Dept. of Environmental Safety and Health

1993-12-31T23:59:59.000Z

348

A multifluid mix model with material strength effects  

SciTech Connect

We present a new multifluid mix model. Its features include material strength effects and pressure and temperature nonequilibrium between mixing materials. It is applicable to both interpenetration and demixing of immiscible fluids and diffusion of miscible fluids. The presented model exhibits the appropriate smooth transition in mathematical form as the mixture evolves from multiphase to molecular mixing, extending its applicability to the intermediate stages in which both types of mixing are present. Virtual mass force and momentum exchange have been generalized for heterogeneous multimaterial mixtures. The compression work has been extended so that the resulting species energy equations are consistent with the pressure force and material strength.

Chang, C. H. [Los Alamos National Laboratory; Scannapieco, A. J. [Los Alamos National Laboratory

2012-04-23T23:59:59.000Z

349

Create a workplan for how to complete the LEDS | Open Energy Information  

Open Energy Info (EERE)

a workplan for how to complete the LEDS a workplan for how to complete the LEDS Jump to: navigation, search Stage 1 LEDS Home Introduction to Framework Assess current country plans, policies, practices, and capacities Develop_BAU Stage 4: Prioritizing and Planning for Actions Begin execution of implementation plans 1.0. Organizing the LEDS Process 1.1. Institutional Structure for LEDS 1.2. Workplan to Develop the LEDS 1.3. Roles and responsibilities to develop LEDS 2.1. Assess current country plans, policies, practices, and capacities 2.2. Compile lessons learned and good practices from ongoing and previous sustainable development efforts in the country 2.3. Assess 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

350

Small Nebraska Town Welcomes LEDs and Energy Savings | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Nebraska Town Welcomes LEDs and Energy Savings Nebraska Town Welcomes LEDs and Energy Savings Small Nebraska Town Welcomes LEDs and Energy Savings November 9, 2010 - 2:00pm Addthis Tecumseh is installing 95 new LED light fixtures throughout the town. | File photo Tecumseh is installing 95 new LED light fixtures throughout the town. | File photo Lindsay Gsell What are the key facts? Rural Tecumseh, Neb. could save up to $6,000 annually with LED lights 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. As part of an Energy Efficiency and Conservation Block Grant through the Recovery Act, Tecumseh is planning to install 95 new LED light fixtures

351

Solid-State Lighting: LED Replacement Lamps: Current Performance and the  

NLE Websites -- All DOE Office Websites (Extended Search)

LED Replacement Lamps: Current LED Replacement Lamps: Current Performance and the Latest on ENERGY STAR® to someone by E-mail Share Solid-State Lighting: LED Replacement Lamps: Current Performance and the Latest on ENERGY STAR® on Facebook Tweet about Solid-State Lighting: LED Replacement Lamps: Current Performance and the Latest on ENERGY STAR® on Twitter Bookmark Solid-State Lighting: LED Replacement Lamps: Current Performance and the Latest on ENERGY STAR® on Google Bookmark Solid-State Lighting: LED Replacement Lamps: Current Performance and the Latest on ENERGY STAR® on Delicious Rank Solid-State Lighting: LED Replacement Lamps: Current Performance and the Latest on ENERGY STAR® on Digg Find More places to share Solid-State Lighting: LED Replacement Lamps: Current Performance and the Latest on ENERGY STAR® on

352

Solid-State Lighting: The City of Los Angeles LED Streetlight...  

NLE Websites -- All DOE Office Websites (Extended Search)

The City of Los Angeles LED Streetlight Program to someone by E-mail Share Solid-State Lighting: The City of Los Angeles LED Streetlight Program on Facebook Tweet about Solid-State...

353

What is the appropriate way to show LED lighting in COMcheck...  

NLE Websites -- All DOE Office Websites (Extended Search)

Policies Glossary Related Links ACE Learning Series What is the appropriate way to show LED lighting in COMcheck? The following steps should be used to account for LED lighting in...

354

Solid-State Lighting: Text-Alternative Version: Evaluating LED Street  

NLE Websites -- All DOE Office Websites (Extended Search)

Evaluating LED Street Lighting Solutions to someone by E-mail Evaluating LED Street Lighting Solutions to someone by E-mail Share Solid-State Lighting: Text-Alternative Version: Evaluating LED Street Lighting Solutions on Facebook Tweet about Solid-State Lighting: Text-Alternative Version: Evaluating LED Street Lighting Solutions on Twitter Bookmark Solid-State Lighting: Text-Alternative Version: Evaluating LED Street Lighting Solutions on Google Bookmark Solid-State Lighting: Text-Alternative Version: Evaluating LED Street Lighting Solutions on Delicious Rank Solid-State Lighting: Text-Alternative Version: Evaluating LED Street Lighting Solutions on Digg Find More places to share Solid-State Lighting: Text-Alternative Version: Evaluating LED Street Lighting Solutions on AddThis.com... Conferences & Meetings Presentations

355

Solid-State Lighting: Text-Alternative Version: LEDs for Interior Office  

NLE Websites -- All DOE Office Websites (Extended Search)

LEDs LEDs for Interior Office Applications to someone by E-mail Share Solid-State Lighting: Text-Alternative Version: LEDs for Interior Office Applications on Facebook Tweet about Solid-State Lighting: Text-Alternative Version: LEDs for Interior Office Applications on Twitter Bookmark Solid-State Lighting: Text-Alternative Version: LEDs for Interior Office Applications on Google Bookmark Solid-State Lighting: Text-Alternative Version: LEDs for Interior Office Applications on Delicious Rank Solid-State Lighting: Text-Alternative Version: LEDs for Interior Office Applications on Digg Find More places to share Solid-State Lighting: Text-Alternative Version: LEDs for Interior Office Applications on AddThis.com... Conferences & Meetings Presentations Publications

356

Department of Energy Selects U.S. University-led Teams for $30...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

U.S. University-led Teams for 30.7 Million in Nuclear Research Grants Department of Energy Selects U.S. University-led Teams for 30.7 Million in Nuclear Research Grants August...

357

Solid-State Lighting: Guided Bus Tour-LEDs in Action  

NLE Websites -- All DOE Office Websites (Extended Search)

building and the nature it encloses. Learn how Phipps uses LEDs to support a net zero, Living Building architectural approach See unique uses of LEDs in a botanical garden and...

358

Solid-State Lighting: Considering LEDs for Street and Area Lighting  

NLE Websites -- All DOE Office Websites (Extended Search)

Considering LEDs for Street and Area Lighting to someone by E-mail Share Solid-State Lighting: Considering LEDs for Street and Area Lighting on Facebook Tweet about Solid-State...

359

Design and implementation of A truecolor wide dimming single-pin LED driver  

E-Print Network (OSTI)

This thesis develops a single-pin LED driver used in wide screen displays. With the increasing size of the displays, a more compact multi-channel driver solution is needed for the increasing number of back light LEDs. This ...

Li, Zhen, M. Eng. Massachusetts Institute of Technology

2010-01-01T23:59:59.000Z

360

APPLICATION NOTE 4393 Selecting HB LED Drivers for Automotive Lighting Applications  

E-Print Network (OSTI)

Abstract: This application note provides an overview of HB LED driver selection criteria for automotive lighting applications. It reviews HB LED driver topologies and recommends configurations for various automotive lighting applications, including interior lighting, exterior lighting, and display backlighting.

Brian Hedayati

2009-01-01T23:59:59.000Z

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


361

A design for an RGB LED driver with independent PWM control and fast settling time  

E-Print Network (OSTI)

A small sized and efficient method to power RGB LEDs for use as backlights in flat panel displays is explored in this thesis. The proposed method is to drive a parallel switched connection of LEDs with a single Average ...

Ashiabor, Awo Dede O

2007-01-01T23:59:59.000Z

362

Have You Used LED Lighting? Tell Us About It. | Department of...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

It. May 7, 2009 - 5:00am Addthis This week, John shared his experiences with light-emitting diode (LED) lighting. In a future blog, he'll share more about LED lighting. Have you...

363

Fabrication of InGaP LEDs on a graded buffer substrate  

E-Print Network (OSTI)

Introduction: Computer display panels create a vast color palette by combining color from three light emitting diodes (LEDs), each producing red, green, or blue light. The light from these three LEDs is chosen so that the ...

Martínez, Josué F

2007-01-01T23:59:59.000Z

364

Neutron and X-ray diffraction studies on the high temperature phase of Mn{sub 3}(VO{sub 4}){sub 2}, the new isostructural compound NaMn{sub 4}(VO{sub 4}){sub 3} and their mixed crystals Na{sub x}Mn{sub 4.5-x/2}(VO{sub 4}){sub 3} (0{<=}x{<=}1)  

SciTech Connect

This paper presents a detailed structure analysis (combined Rietveld analysis of X-ray and neutron powder diffraction data as well as quantum mechanical calculations) of the high temperature phase of Mn{sub 3}(VO{sub 4}){sub 2} (space group I4 Macron 2d). Special attention is directed to the analysis of the local coordination around Mn{sup 2+} ions or vacancies within a stella quadrangula configuration of anions. Furthermore, the new compound NaMn{sub 4}(VO{sub 4}){sub 3} is described as well as a range of mixed crystals between NaMn{sub 4}(VO{sub 4}){sub 3} and Mn{sub 3}(VO{sub 4}){sub 2} (described by the formula Na{sub x}Mn{sub 4.5-x/2}(VO{sub 4}){sub 3}, 0{<=}x{<=}1) which were synthesized by a solid state route. All compounds were shown to be isostructural to the high temperature phase Mn{sub 3}(VO{sub 4}){sub 2}. - Graphical abstract: The crystal structure of the new compound NaMn{sub 4}(VO{sub 4}){sub 3}. Highlights: Black-Right-Pointing-Pointer We present neutron and X-ray diffraction studies on high temperature-Mn{sub 3}(VO{sub 4}){sub 2}. Black-Right-Pointing-Pointer Structural details of partly filled stellae quadrangulae positions are discussed. Black-Right-Pointing-Pointer Refined structural parameters and theoretical calculations are compared. Black-Right-Pointing-Pointer We investigate the mixed crystal system Mn{sub 3}(VO{sub 4}){sub 2}-NaMn{sub 4}(VO{sub 4}){sub 3}.

Clemens, Oliver [Universitaet des Saarlandes, Institut fuer Anorganische und Analytische Chemie und Radiochemie, Am Markt, Zeile 5, 66125 Saarbruecken (Germany)] [Universitaet des Saarlandes, Institut fuer Anorganische und Analytische Chemie und Radiochemie, Am Markt, Zeile 5, 66125 Saarbruecken (Germany); Haberkorn, Robert [Universitaet des Saarlandes, Anorganische Festkoerperchemie, Am Markt, Zeile 3, 66125 Saarbruecken (Germany)] [Universitaet des Saarlandes, Anorganische Festkoerperchemie, Am Markt, Zeile 3, 66125 Saarbruecken (Germany); Springborg, Michael [Universitaet des Saarlandes, Physikalische und Theoretische Chemie, Campus B2 2, 66123 Saarbruecken (Germany)] [Universitaet des Saarlandes, Physikalische und Theoretische Chemie, Campus B2 2, 66123 Saarbruecken (Germany); Beck, Horst Philipp, E-mail: hp.beck@mx.uni-saarland.de [Universitaet des Saarlandes, Institut fuer Anorganische und Analytische Chemie und Radiochemie, Am Markt, Zeile 5, 66125 Saarbruecken (Germany)

2012-10-15T23:59:59.000Z

365

CNST-led Team Calculates the Role of Buried Layers in Few ...  

Science Conference Proceedings (OSTI)

CNST-led Team Calculates the Role of Buried Layers in Few-Layer Epitaxial Graphene. June 8, 2011. ...

2012-06-06T23:59:59.000Z

366

Issues, Models and Solutions for Triac Modulated Phase Dimming of LED Lamps  

E-Print Network (OSTI)

/a 30 lumens 0.1 Incandescent Bulb 15 W 225 lumens 15 Fluorescent Tube Lamp 10 W 500 lumens 50 White LED bulbs, and fluorescent lights, produce light that is radiated in all directions, LEDs produce a focused especially on the potential of white LED lights, which are an important and newly emerging lighting

Lehman, Brad

367

Uniform illumination rendering using an array of LEDs: a signal processing perspective  

Science Conference Proceedings (OSTI)

An array of a large number of LEDs will be widely used in future indoor illumination systems. In this paper, we investigate the problem of rendering uniform illumination by a regular LED array on the ceiling of a room. We first present two general results ... Keywords: LED illumination, basic illumination pattern, regular grid, two-dimensional signal processing

Hongming Yang; Jan W. M. Bergmans; Tim C. W. Schenk; Jean-Paul M. G. Linnartz; Ronald Rietman

2009-03-01T23:59:59.000Z

368

TESLA-FEL 2007-03 Application of low cost GaAs LED as neutron  

E-Print Network (OSTI)

neutrons in unbiased Gallium Arsenide (GaAs) Light Emitting Diodes (LED) resulted in a reduction Keywords: COTS components, Displacement damage, Electron Linear Accelerator, GaAs Light emitting diode (LED) Gallium Arsenide (GaAs) light emitting diode (LED) for the assessment of integrated neutron fluence

369

Development and application of a web-based programming learning system with LED display kits  

Science Conference Proceedings (OSTI)

This paper describes a new programming learning system. It consists of a Web-based flowchart application and Light Emitting Diode (LED) display kits. The LED kits produce various animations or static images according to a flow chart. The flowchart tool ... Keywords: flowchart, led display kit, programming, web-based learning

Seok-Ju Chun; Jungwoo Ryoo

2010-03-01T23:59:59.000Z

370

Mixed Waste Characterization Guidelines  

Science Conference Proceedings (OSTI)

This report presents an overview of the process of characterizing potential mixed waste streams from nuclear power plants. Utility experts developed these guidelines to help guide utility personnel through the characterization process and provide a mechanism for properly documenting the characterization of individual waste streams.

1995-12-31T23:59:59.000Z

371

DOE Science Showcase - Light-emitting Diode (LED) Lighting Research | OSTI,  

Office of Scientific and Technical Information (OSTI)

Science Showcase - Light-emitting Diode (LED) Lighting Research Science Showcase - Light-emitting Diode (LED) Lighting Research Light-emitting diode (LED) lighting is a type of solid-state lighting that uses a semiconductor to convert electricity to light. LED lighting products are beginning to appear in a wide variety of home, business, and industrial products such as holiday lighting, replacement bulbs for incandescent lamps, street lighting, outdoor area lighting and indoor ambient lighting. Over the past decade, LED technology research and development supported by the U.S. Department of Energy (DOE) has yielded impressive improvements in the cost, color performance, light output, efficacy, reliability, lifetime, and manufacturability of LED products and this upward trend is expected to continue. Read about the latest DOE research, the technology behind LEDs,

372

Assess institutional frameworks for LEDS for land-use sector | Open Energy  

Open Energy Info (EERE)

Assess institutional frameworks for LEDS for land-use sector Assess institutional frameworks for LEDS for land-use sector Jump to: navigation, search Stage 3 LEDS Home Introduction to Framework Assess current country plans, policies, practices, and capacities Develop_BAU Stage 4: Prioritizing and Planning for Actions Begin execution of implementation plans 1.0. Organizing the LEDS Process 1.1. Institutional Structure for LEDS 1.2. Workplan to Develop the LEDS 1.3. Roles and responsibilities to develop LEDS 2.1. Assess current country plans, policies, practices, and capacities 2.2. Compile lessons learned and good practices from ongoing and previous sustainable development efforts in the country 2.3. Assess public and private sector capacity to support initiatives 2.4. Assess and improve the national GHG inventory and other

373

CDKN-Zimbabwe-Terms of Reference for Future LEDS | Open Energy Information  

Open Energy Info (EERE)

Zimbabwe-Terms of Reference for Future LEDS Zimbabwe-Terms of Reference for Future LEDS Jump to: navigation, search Name CDKN-Zimbabwe-Terms of Reference for Future LEDS Agency/Company /Organization Climate and Development Knowledge Network (CDKN), United Kingdom Department for International Development Sector Climate, Energy, Land Topics Background analysis, Low emission development planning, -LEDS, Market analysis, Pathways analysis Website http://cdkn.org/ Country Zimbabwe UN Region Southern Africa References CDKN-Zimbabwe-Terms of Reference for Future LEDS[1] This article is a stub. You can help OpenEI by expanding it. References ↑ "CDKN-Zimbabwe-Terms of Reference for Future LEDS" Retrieved from "http://en.openei.org/w/index.php?title=CDKN-Zimbabwe-Terms_of_Reference_for_Future_LEDS&oldid=407560"

374

Solid-State Lighting: Member Case Studies: LED Street Lighting Programs in  

NLE Websites -- All DOE Office Websites (Extended Search)

Member Case Studies: LED Street Member Case Studies: LED Street Lighting Programs in Algona (IA), Asheville (NC), and Boston (MA) to someone by E-mail Share Solid-State Lighting: Member Case Studies: LED Street Lighting Programs in Algona (IA), Asheville (NC), and Boston (MA) on Facebook Tweet about Solid-State Lighting: Member Case Studies: LED Street Lighting Programs in Algona (IA), Asheville (NC), and Boston (MA) on Twitter Bookmark Solid-State Lighting: Member Case Studies: LED Street Lighting Programs in Algona (IA), Asheville (NC), and Boston (MA) on Google Bookmark Solid-State Lighting: Member Case Studies: LED Street Lighting Programs in Algona (IA), Asheville (NC), and Boston (MA) on Delicious Rank Solid-State Lighting: Member Case Studies: LED Street Lighting Programs in Algona (IA), Asheville (NC), and Boston (MA) on Digg

375

LEDs and Specification for Parking Lots Lighten Energy Load | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

LEDs and Specification for Parking Lots Lighten Energy Load LEDs and Specification for Parking Lots Lighten Energy Load LEDs and Specification for Parking Lots Lighten Energy Load March 5, 2013 - 11:17am Addthis At its Supercenter in Leavenworth, Kansas—the first site to implement the LED Site Lighting Specification—Walmart anticipates energy savings of over 125,000 kWh per year and a 30% reduction in maintenance costs. In addition to parking lot lights, LED bollard lights illuminate the pedestrian walkway. Credit: Walmart At its Supercenter in Leavenworth, Kansas-the first site to implement the LED Site Lighting Specification-Walmart anticipates energy savings of over 125,000 kWh per year and a 30% reduction in maintenance costs. In addition to parking lot lights, LED bollard lights illuminate the

376

Zimbabwe-Terms of Reference for Future LEDS | Open Energy Information  

Open Energy Info (EERE)

Zimbabwe-Terms of Reference for Future LEDS Zimbabwe-Terms of Reference for Future LEDS Jump to: navigation, search Name Zimbabwe-Terms of Reference for Future LEDS Agency/Company /Organization Climate and Development Knowledge Network (CDKN), United Kingdom Department for International Development Sector Climate, Energy, Land Topics Background analysis, Low emission development planning, -LEDS, Market analysis, Pathways analysis Website http://cdkn.org/ Country Zimbabwe UN Region Southern Africa References CDKN-Zimbabwe-Terms of Reference for Future LEDS[1] This article is a stub. You can help OpenEI by expanding it. References ↑ "CDKN-Zimbabwe-Terms of Reference for Future LEDS" Retrieved from "http://en.openei.org/w/index.php?title=Zimbabwe-Terms_of_Reference_for_Future_LEDS&oldid=698706"

377

Anomalous Spiking in Spectra of XCTD Temperature Profiles  

Science Conference Proceedings (OSTI)

The high vertical resolution of temperature and salinity measurements from expendable conductivity–temperature–depth (XCTD) instruments can be useful for inferring small-scale mixing rates in the ocean. However, XCTD temperature profiles show ...

Sarah T. Gille; Aaron Lombrozo; Janet Sprintall; Gordon Stephenson; Richard Scarlet

2009-06-01T23:59:59.000Z

378

Process for etching mixed metal oxides  

DOE Patents (OSTI)

An etching process using dicarboxylic and tricarboxylic acids as chelating etchants for mixed metal oxide films such as high temperature superconductors and ferroelectric materials. Undesirable differential etching rates between different metal oxides are avoided by selection of the proper acid or combination of acids. Feature sizes below one micron, excellent quality vertical edges, and film thicknesses in the 100 Angstom range may be achieved by this method.

Ashby, Carol I. H. (Edgewood, NM); Ginley, David S. (Evergreen, CO)

1994-01-01T23:59:59.000Z

379

Process for etching mixed metal oxides  

DOE Patents (OSTI)

An etching process is described using dicarboxylic and tricarboxylic acids as chelating etchants for mixed metal oxide films such as high temperature superconductors and ferroelectric materials. Undesirable differential etching rates between different metal oxides are avoided by selection of the proper acid or combination of acids. Feature sizes below one micron, excellent quality vertical edges, and film thicknesses in the 100 Angstrom range may be achieved by this method. 1 fig.

Ashby, C.I.H.; Ginley, D.S.

1994-10-18T23:59:59.000Z

380

Setting the best view of a virtual teacher in a mixed reality physical-task learning support system  

Science Conference Proceedings (OSTI)

In this research, we investigated the virtual teacher's positions and orientations that led to optimal learning outcome in mixed-reality environment. First, this study showed that the virtual teacher's position and orientation have an effect on learning ... Keywords: Collaborative computing, Human computer interaction, Mixed reality, Physical tasks learning, Virtual reality

Mamoun Nawahdah, Tomoo Inoue

2013-07-01T23:59:59.000Z

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


381

Mixed Seed Laboratory Proficiency Testing Program Mixed Seed  

Science Conference Proceedings (OSTI)

Laboratory Proficiency Testing service for Sunflower,Safflower, and Canola to test Oil, Clean Seed Basis, Nitrogen, Free Fatty Acids, Glucosinolates, Chlorophyll. Mixed Seed Laboratory Proficiency Testing Program Mixed Seed Laboratory Proficiency Program

382

Nozzle mixing apparatus  

DOE Patents (OSTI)

This invention is comprised of a nozzle device for causing two fluids to mix together. In particular, a spray nozzle comprise two hollow, concentric housings, an inner housing and an outer housing. The inner housing has a channel formed therethrough for a first fluid. Its outer surface cooperates with the interior surface of the outer housing to define the second channel for a second fluid. The outer surface of the inner housing and the inner surface of the outer housing each carry a plurality of vanes that interleave but do not touch, each vane of one housing being between two vanes of the other housing. The vanes are curved and the inner surface of the outer housing and the outer surface of the inner housing converge to narrow the second channel. The shape of second channel results in a swirling, accelerating second fluid that will impact the first fluid just past the end of the nozzle where mixing will take place.

Mensink, D.L.

1992-12-31T23:59:59.000Z

383

Mixed Waste Recycling Exemption  

Science Conference Proceedings (OSTI)

As part of an ongoing integrated mixed waste program, EPRI has documented the process for obtaining state approval to apply the Resource Conservation and Recovery Act (RCRA) recycling exemption. This report examines the regulatory basis for the recycling exemption and the strategy for designing and operating a recycling facility to meet that exemption. Specifically addressed is the process of submitting an actual recycling exemption request to an RCRA authorized state and potential roadblocks utilities m...

1998-11-30T23:59:59.000Z

384

Comparing Light-Emitting Diode (LED) Street and Area Lighting to Traditional Lighting Technologies: Assessing LED Performance at Gul f Power in Pensacola, Florida  

Science Conference Proceedings (OSTI)

Manufacturing advances have now made the use of light-emitting diode (LED) technology practical for street and area lighting. To better understand the application, the Electric Power research Institute (EPRI teamed with Southern Company and Gulf Power to install LED street lights at a demonstration site and measure the performance. The data showed several disadvantages such as a lower efficacy compared to traditional technology and lower immunity to electrical disturbances, but advantages in energy savin...

2012-04-21T23:59:59.000Z

385

Demonstration Assessment of Light Emitting Diode (LED) Residential Downlights and Undercabinet Lights in the Lane County Tour of Homes, Eugene, Oregon  

SciTech Connect

In August 2008 the Pacific Northwest National Laboratory (PNNL) conducted a light emitting diode (LED) residential lighting demonstration project for the U.S. Department of Energy (DOE), Office of Building Technologies, as part of DOE’s Solid State Lighting (SSL) Technology Demonstration Gateway Program. Two lighting technologies, an LED replacement for downlight lamps (bulbs) and an LED undercabinet lighting fixture, were tested in the demonstration which was conducted in two homes built for the 2008 Tour of Homes in Eugene, Oregon. The homes were built by the Lane County Home Builders Association (HBA), and Future B Homes. The Energy Trust of Oregon (ETO) also participated in the demonstration project. The LED downlight product, the LR6, made by Cree LED Lighting Solutions acts as a screw-in replacement for incandescent and halogen bulbs in recessed can downlights. The second product tested is Phillips/Color Kinetics’ eW® Profile Powercore undercabinet fixture designed to mount under kitchen cabinets to illuminate the countertop and backsplash surfaces. Quantitative and qualitative measurements of light performance and electrical power usage were taken at each site before and after initially installed halogen and incandescent lamps were replaced with the LED products. Energy savings and simple paybacks were also calculated and builders who toured the homes were surveyed for their responses to the LED products. The LED downlight product drew 12 Watts of power, cutting energy use by 82% compared to the 65W incandescent lamp and by 84% compared to the 75W halogen lamp. The LED undercabinet fixture drew 10 watts, cutting energy use by 83% to 90% compared to the halogen product, which was tested at two power settings: a low power 60W setting and a high power 105W setting. The LED downlight consistently provided more light than the halogen and incandescent lamps in horizontal measurements at counter height and floor level. It also outperformed in vertical illuminance measurements taken on the walls, indicating better lateral dispersion of the light. The undercabinet fixture’s light output was midway between the low and high power halogen undercabinet fixture light outputs (35.8 foot candle versus 13.4 fc and 53.4 fc) but it produced a more uniform light (max/min ratio of 7.0 versus 10.8). The color correlated temperature (CCT, the blue or yellowness) of the LED light correlated well with the halogen and incandescent lights (2675 K vs 2700 K). The color rendering of the LED downlight also correlated well at 92 CRI compared to 100 CRI for the halogen and incandescent lamps. The LED undercabinet fixture had measures of 2880 K CCT and 71 CRI compared to the 2700 K and 100 CRI scores for the halogen undercabinet fixture. Builders who toured the homes were surveyed; they gave the LED downlight high marks for brightness, said the undercabinet improved shadows and glare and said both products improved overall visibility, home appearance, and home value. Paybacks on the LED downlight ranged from 7.6 years (assuming electricity cost of 11 c/kWh) to 13.5 years (at 5C/kWh). Paybacks on the LED undercabinet fixture in a new home ranged from 4.4 years (11c/kWh electricity) to 7.6 years (5c/kWh) based on product costs of $95 per LED downlight and $140 per LED undercabinet fixture at 3 hrs per day of usage for the downlight and 2 hrs per day for the undercabinet lighting.

Ton, My K.; Richman, Eric E.; Gilbride, Theresa L.

2008-11-10T23:59:59.000Z

386

Performance of T12 and T8 Fluorescent Lamps and Troffers and LED Linear Replacement Lamps CALiPER Benchmark Report  

Science Conference Proceedings (OSTI)

The Department of Energy (DOE) Commercially Available LED Product Evaluation and Reporting (CALiPER) Program was established in 2006 to investigate the performance of light-emitting diode (LED) based luminaires and replacement lamps. To help users better compare LED products with conventional lighting technologies, CALiPER has also performed benchmark research and testing of traditional (i.e., non-LED) lamps and fixtures. This benchmark report addresses standard 4-foot fluorescent lamps (i.e., T12 and T8) and the 2-foot by 4-foot recessed troffers in which they are commonly used. This report also examines available LED replacements for T12 and T8 fluorescent lamps, and their application in fluorescent troffers. The construction and operation of linear fluorescent lamps and troffers are discussed, as well as fluorescent lamp and fixture performance, based on manufacturer data and CALiPER benchmark testing. In addition, the report describes LED replacements for linear fluorescent lamps, and compares their bare lamp and in situ performance with fluorescent benchmarks on a range of standard lighting measures, including power usage, light output and distribution, efficacy, correlated color temperature, and the color rendering index. Potential performance and application issues indicated by CALiPER testing results are also examined.

Myer, Michael; Paget, Maria L.; Lingard, Robert D.

2009-01-16T23:59:59.000Z

387

Available Technologies: Mixed Bioenergy Feedstock ...  

APPLICATIONS OF TECHNOLOGY: Biomass pretreatment to extract 6C sugars from mixed feedstocks for . Lignocellulosic biofuel production; High value ...

388

Solid-State Lighting: Text-Alternative Version: Model Specification for LED  

NLE Websites -- All DOE Office Websites (Extended Search)

Information Information Resources Printable Version Share this resource Send a link to Solid-State Lighting: Text-Alternative Version: Model Specification for LED Roadway Luminaires Webcast to someone by E-mail Share Solid-State Lighting: Text-Alternative Version: Model Specification for LED Roadway Luminaires Webcast on Facebook Tweet about Solid-State Lighting: Text-Alternative Version: Model Specification for LED Roadway Luminaires Webcast on Twitter Bookmark Solid-State Lighting: Text-Alternative Version: Model Specification for LED Roadway Luminaires Webcast on Google Bookmark Solid-State Lighting: Text-Alternative Version: Model Specification for LED Roadway Luminaires Webcast on Delicious Rank Solid-State Lighting: Text-Alternative Version: Model Specification for LED Roadway Luminaires Webcast on Digg

389

Slideshow: Flipping the Switch on LED Lighting for the National Mall |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Slideshow: Flipping the Switch on LED Lighting for the National Slideshow: Flipping the Switch on LED Lighting for the National Mall Slideshow: Flipping the Switch on LED Lighting for the National Mall January 31, 2012 - 3:05pm Addthis 1 of 8 Facing East toward the Capitol Building, LED retrofitted lights line the interior paths of the mall while preserving the architectural integrity of the original fixtures. Image: Energy Department Image | Photo by Quentin Kruger (Contractor) | Public Domain Date taken: 2012-01-30 06:00 2 of 8 Energy Secretary Steven Chu discusses the 65% savings on electric bills and lowered maintenance costs the National Parks Service is experiencing by switching to energy efficient LED lights. "Using energy-efficient LED light bulbs is an important way Americans can save money by saving energy," said

390

Peru-Enhancing Capacity for Low Emission Development Strategies (EC-LEDS) |  

Open Energy Info (EERE)

Peru-Enhancing Capacity for Low Emission Development Strategies (EC-LEDS) Peru-Enhancing Capacity for Low Emission Development Strategies (EC-LEDS) Jump to: navigation, search Name Peru-Enhancing Capacity for Low Emission Development Strategies (EC-LEDS) Agency/Company /Organization United States Agency for International Development, United States Environmental Protection Agency, United States Department of Energy, United States Department of Agriculture, United States Department of State Sector Climate, Energy, Land Topics Low emission development planning, -LEDS Program Start 2010 Program End 2016 Country Peru South America References EC-LEDS[1] Contents 1 Overview 2 Framework 3 Lessons Learned and Good Practices 4 Progress and Outcomes 5 Fact Sheet 6 References Overview "Enhancing Capacity for Low Emission Development Strategies (EC-LEDS) is a

391

Serbia-Enhancing Capacity for Low Emission Development Strategies (EC-LEDS)  

Open Energy Info (EERE)

Serbia-Enhancing Capacity for Low Emission Development Strategies (EC-LEDS) Serbia-Enhancing Capacity for Low Emission Development Strategies (EC-LEDS) Jump to: navigation, search Name Serbia-Enhancing Capacity for Low Emission Development Strategies (EC-LEDS) Agency/Company /Organization United States Agency for International Development, United States Environmental Protection Agency, United States Department of Energy, United States Department of Agriculture, United States Department of State Sector Climate, Energy, Land Topics Low emission development planning, -LEDS Program Start 2010 Program End 2016 Country Serbia Southern Europe References EC-LEDS[1] Contents 1 Overview 2 Framework 3 Lessons Learned and Good Practices 4 Progress and Outcomes 5 Fact Sheet 6 References Overview "Enhancing Capacity for Low Emission Development Strategies (EC-LEDS) is a

392

Zambia-Enhancing Capacity for Low Emission Development Strategies (EC-LEDS)  

Open Energy Info (EERE)

Zambia-Enhancing Capacity for Low Emission Development Strategies (EC-LEDS) Zambia-Enhancing Capacity for Low Emission Development Strategies (EC-LEDS) Jump to: navigation, search Name Zambia-Enhancing Capacity for Low Emission Development Strategies (EC-LEDS) Agency/Company /Organization United States Agency for International Development, United States Environmental Protection Agency, United States Department of Energy, United States Department of Agriculture, United States Department of State Sector Climate, Energy, Land Topics Low emission development planning, -LEDS Program Start 2010 Program End 2016 Country Zambia Eastern Africa References EC-LEDS[1] Contents 1 Overview 2 Framework 3 Lessons Learned and Good Practices 4 Progress and Outcomes 5 Fact Sheet 6 References Overview "Enhancing Capacity for Low Emission Development Strategies (EC-LEDS) is a

393

Malawi-Enhancing Capacity for Low Emission Development Strategies (EC-LEDS)  

Open Energy Info (EERE)

Malawi-Enhancing Capacity for Low Emission Development Strategies (EC-LEDS) Malawi-Enhancing Capacity for Low Emission Development Strategies (EC-LEDS) Jump to: navigation, search Name Malawi-Enhancing Capacity for Low Emission Development Strategies (EC-LEDS) Agency/Company /Organization United States Agency for International Development, United States Environmental Protection Agency, United States Department of Energy, United States Department of Agriculture, United States Department of State Sector Climate, Energy, Land Topics Low emission development planning, -LEDS Program Start 2010 Program End 2016 Country Malawi Eastern Africa References EC-LEDS[1] Contents 1 Overview 2 Framework 3 Lessons Learned and Good Practices 4 Progress and Outcomes 5 Fact Sheet 6 References Overview "Enhancing Capacity for Low Emission Development Strategies (EC-LEDS) is a

394

Solid-State Lighting: Text-Alternative Version: Successful Selection of LED  

NLE Websites -- All DOE Office Websites (Extended Search)

Text-Alternative Version: Text-Alternative Version: Successful Selection of LED Streetlight Luminaires Webcast to someone by E-mail Share Solid-State Lighting: Text-Alternative Version: Successful Selection of LED Streetlight Luminaires Webcast on Facebook Tweet about Solid-State Lighting: Text-Alternative Version: Successful Selection of LED Streetlight Luminaires Webcast on Twitter Bookmark Solid-State Lighting: Text-Alternative Version: Successful Selection of LED Streetlight Luminaires Webcast on Google Bookmark Solid-State Lighting: Text-Alternative Version: Successful Selection of LED Streetlight Luminaires Webcast on Delicious Rank Solid-State Lighting: Text-Alternative Version: Successful Selection of LED Streetlight Luminaires Webcast on Digg Find More places to share Solid-State Lighting: Text-Alternative

395

Slideshow: Flipping the Switch on LED Lighting for the National Mall |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Slideshow: Flipping the Switch on LED Lighting for the National Slideshow: Flipping the Switch on LED Lighting for the National Mall Slideshow: Flipping the Switch on LED Lighting for the National Mall January 31, 2012 - 3:05pm Addthis 1 of 8 Facing East toward the Capitol Building, LED retrofitted lights line the interior paths of the mall while preserving the architectural integrity of the original fixtures. Image: Energy Department Image | Photo by Quentin Kruger (Contractor) | Public Domain Date taken: 2012-01-30 06:00 2 of 8 Energy Secretary Steven Chu discusses the 65% savings on electric bills and lowered maintenance costs the National Parks Service is experiencing by switching to energy efficient LED lights. "Using energy-efficient LED light bulbs is an important way Americans can save money by saving energy," said

396

Event:LEDS GP Event at Rio+20 | Open Energy Information  

Open Energy Info (EERE)

Rio+20 Rio+20 Jump to: navigation, search Calendar.png LEDS GP Event at Rio+20: 15:30 - 17:00 on 2012/06/19 The purpose of the event is to share information on current LEDS GP activities and explore opportunities for collaboration with other related activities. We are looking forward to an exciting discussion on how we can work together to foster low emissions development around the world. The "LEDS Global Partnership - Enhancing Global Collaboration on Low Emissions Development" will be held on June 19th, 2012 from 15:30-17:00 at the U.S. Center, located at the Athletes Park in Barra da Tijuca, across from Rio Centro. Event Details Name LEDS GP Event at Rio+20 Date 2012/06/19 Time 15:30 - 17:00 Location Brazil Organizer LEDS GP Tags LEDS, CLEAN, Training

397

Researchers Say They've Solved the Mystery of LED Lighting "Droop" |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Researchers Say They've Solved the Mystery of LED Lighting "Droop" Researchers Say They've Solved the Mystery of LED Lighting "Droop" Researchers Say They've Solved the Mystery of LED Lighting "Droop" May 5, 2011 - 3:32pm Addthis An illustration of nitride-based LEDs.| Courtesy of the National Energy Research Scientific Computing Center. An illustration of nitride-based LEDs.| Courtesy of the National Energy Research Scientific Computing Center. Margie Wylie Communications Specialist, Berkeley Lab Computing Sciences Team. Despite being cool, ultra-efficient and long lasting, the light-emitting diode (LED) faces a problem called "efficiency droop." New findings from simulations carried out at the National Energy Research Scientific Computer Center (NERSC) have unearthed droop's elusive cause, researchers

398

Mexico-Enhancing Capacity for Low Emission Development Strategies (EC-LEDS)  

Open Energy Info (EERE)

Mexico-Enhancing Capacity for Low Emission Development Strategies (EC-LEDS) Mexico-Enhancing Capacity for Low Emission Development Strategies (EC-LEDS) Jump to: navigation, search Name Mexico-Enhancing Capacity for Low Emission Development Strategies (EC-LEDS) Agency/Company /Organization United States Agency for International Development, United States Environmental Protection Agency, United States Department of Energy, United States Department of Agriculture, United States Department of State Sector Climate, Energy, Land Focus Area Renewable Energy Topics Low emission development planning, -LEDS Program Start 2010 Program End 2016 Country Mexico Central America References EC-LEDS[1] Contents 1 Overview 2 Framework 3 Lessons Learned and Good Practices 4 Progress and Outcomes 5 Fact Sheet 6 References Overview "Enhancing Capacity for Low Emission Development Strategies (EC-LEDS) is a

399

LED exit signs: Improved technology leads the way to energy savings  

SciTech Connect

Recent innovations in light-emitting diode (LED) exit signs may make LED signs the best choice among the energy efficient options available. In the past, LED signs have offered low power consumption, projected long lamp life, and low maintenance requirements. Now, the best of the LED signs also offer improved optical designs that reduce their already low power consumption while improving visibility and appearance, and even reduce their cost. LED exit signs are gaining market share, and E Source expects this technology to eventually dominate over incandescent, compact fluorescent, and electroluminescent signs. More research is needed, however, to confirm manufacturers` claims of 20-year operating lives for LED signs. Conservative estimates place the number of exit signs in US buildings at about 40 million. Although each sign represents a very small part of a building`s load, exit signs are ready targets for energy efficiency upgrades -- they operate continuously and most use inefficient incandescent sources. With an LED sign, annual energy and maintenance costs can be reduced by more than 90 percent compared to a typical incandescent sign. Low annual costs help to offset the LED sign`s relatively high first cost. More than 25 utilities offer DSM incentives for energy efficient exit signs, and efficient alternatives are becoming more readily available. Recent improvements in optical designs enable many LED signs to visually out perform other sources. In addition to these benefits, LED exit signs have lower life cycle cost than most other options. The biggest barrier to their success, however, is that their first cost has been considerably higher than competing technologies. LED sign prices are falling rapidly, though, because manufacturers are continually improving optical designs of the fixtures to use fewer LEDs and thus even less energy while providing better performance.

Sardinsky, R.; Hawthorne, S.

1994-12-31T23:59:59.000Z

400

Comparing Light-Emitting Diode (LED) Street and Area Lighting to Traditional Lighting Technologies  

Science Conference Proceedings (OSTI)

Manufacturing advances have now made the use of light-emitting diode (LED) technology practical for street and area lighting. To better understand the application, the Electric Power Research Institute (EPRI) teamed with Southern Company and Gulf Power to install LED street lights at a demonstration site and measure their performance. The data showed several disadvantages for the LED lights, such as a lower efficacy compared to traditional technology and lower immunity to electrical disturbances, but an ...

2012-04-06T23:59:59.000Z

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


401

Solid-State Lighting: LED Site Lighting in the Commercial Building Sector:  

NLE Websites -- All DOE Office Websites (Extended Search)

Site Lighting in the Site Lighting in the Commercial Building Sector: Opportunities, Challenges, and the CBEA Performance Specification to someone by E-mail Share Solid-State Lighting: LED Site Lighting in the Commercial Building Sector: Opportunities, Challenges, and the CBEA Performance Specification on Facebook Tweet about Solid-State Lighting: LED Site Lighting in the Commercial Building Sector: Opportunities, Challenges, and the CBEA Performance Specification on Twitter Bookmark Solid-State Lighting: LED Site Lighting in the Commercial Building Sector: Opportunities, Challenges, and the CBEA Performance Specification on Google Bookmark Solid-State Lighting: LED Site Lighting in the Commercial Building Sector: Opportunities, Challenges, and the CBEA Performance Specification on Delicious

402

Culture-led regeneration: an opportunity for sustainable urban regeneration in Hong Kong?.  

E-Print Network (OSTI)

???Culture-led regeneration policy has become a global trend in many major cities worldwide (UNCHS, 2004; Miles and Paddison, 2005). While overseas governments such as the… (more)

Lee, Cheuk-hei.

2012-01-01T23:59:59.000Z

403

Development of an LED reference light source for calibration of radiographic imaging detectors  

E-Print Network (OSTI)

A stable reference light source based on an LED (Light Emission Diode) is presented for stabilizing the conversion gain of the opto-electronic system of a gamma- and fast-neutron radiographic and tomographic imaging device. A constant fraction of the LED light is transported to the image plane of the camera and provides a stable reference exposure. This is used to normalize the images during off-line image processing. We have investigated parameters influencing the stability of LEDs and developed procedures and criteria to prepare and select LEDs suitable for delivering stable light outputs for several 100 h of operation.

Weierganz, M; Bromberger, B; Dangendorf, V; Feldman, G; Goldberg, M B; Lindemann, M; Mor, I; Tittelmeier, K; Vartsky, D

2010-01-01T23:59:59.000Z

404

Development of an LED reference light source for calibration of radiographic imaging detectors  

E-Print Network (OSTI)

A stable reference light source based on an LED (Light Emission Diode) is presented for stabilizing the conversion gain of the opto-electronic system of a gamma- and fast-neutron radiographic and tomographic imaging device. A constant fraction of the LED light is transported to the image plane of the camera and provides a stable reference exposure. This is used to normalize the images during off-line image processing. We have investigated parameters influencing the stability of LEDs and developed procedures and criteria to prepare and select LEDs suitable for delivering stable light outputs for several 100 h of operation.

M. Weierganz; D. Bar; B. Bromberger; V. Dangendorf; G. Feldman; M. B. Goldberg; M. Lindemann; I. Mor; K. Tittelmeier; D. Vartsky

2010-02-08T23:59:59.000Z

405

Observed Minimum Illuminance Threshold for Night Market Vendors in Kenya who use LED Lamps  

E-Print Network (OSTI)

for Small Businesses in Kenya." Lumina Project Technicalfor Night Market Vendors in Kenya who use LED Lamps Petermany people and businesses in Kenya who participated in this

Johnstone, Peter

2009-01-01T23:59:59.000Z

406

Mexico-EC-LEDS in the Agriculture Sector | Open Energy Information  

Open Energy Info (EERE)

Mexico-EC-LEDS in the Agriculture Sector Mexico-EC-LEDS in the Agriculture Sector Jump to: navigation, search Name Mexico-EC-LEDS in the Agriculture Sector Agency/Company /Organization United States Department of Agriculture, United States Department of State Partner Ministry of Agriculture, Ministry of Environment Sector Climate, Land Focus Area Agriculture, Economic Development, Greenhouse Gas, Land Use Topics Adaptation, Implementation, Low emission development planning, -LEDS, Policies/deployment programs Program Start 2011 Program End 2013 Country Mexico Central America References Land Use Assessment Toolkit - Agriculture Resources[1] Overview Progress and Outcomes Capacity building activities include strengthening implementation of climate change policies, development of climate change policies, and

407

A Model for Interprofessional Health Disparities Education: Student-Led Curriculum on Chronic Hepatitis B Infection  

E-Print Network (OSTI)

in the medical curriculum: developing and evaluating anInterprofessional Hepatitis B Curriculum S145 21. DiemersEducation: Student-Led Curriculum on Chronic Hepatitis B

Sheu, Leslie C.; Toy, Brian C.; Kwahk, Emanuel; Yu, Albert; Adler, Joshua; Lai, Cindy J.

2010-01-01T23:59:59.000Z

408

Effetti della distribuzione spaziale delle sorgenti elementari in una lampada a LED.  

E-Print Network (OSTI)

??Obiettivo del lavoro č stato quello di valutare gli effetti prodotti su una superficie da diverse distribuzioni spaziali delle sorgenti elementari in lampade a LED,… (more)

Furlanetto, Mattia

2010-01-01T23:59:59.000Z

409

Development of a large scale flexible LED display matrix for the screen industry.  

E-Print Network (OSTI)

??This project addresses the viability of lightweight, low power consumption, flexible, large format LED screens. The investigation encompasses all aspects of the electrical and mechanical… (more)

Xavier, Dominic Michael

2013-01-01T23:59:59.000Z

410

New family of tiny crystals glow bright in LED lights | ornl...  

NLE Websites -- All DOE Office Websites (Extended Search)

| ORNL | News | Features SHARE News Feature New family of tiny crystals glow bright in LED lights ORNL scientist probes atomic structure to improve materials' luminescence...

411

Caratterizzazione e studio di affidabilitŕ di LED bianchi ad alta efficienza per applicazioni di backlighting.  

E-Print Network (OSTI)

??Lo scopo principale della seguente tesi č quello di analizzare diodi led bianchi commerciali per applicazioni di backlighting di diversi produttori e metterli a confronto.… (more)

Sterchele, Michael

2011-01-01T23:59:59.000Z

412

Is LED use in traffic signals viable in the Texas Department of Transportation, Houston District?.  

E-Print Network (OSTI)

??Light Emitting Diode (LED) is used in traffic signals and highway illumination in the Texas Department of Transportation, Houston District (TxDOT). The thesis focuses on… (more)

Ughanze, Ugonna Uzodinma

2012-01-01T23:59:59.000Z

413

THE ASSESSMENT OF HIGH DYNAMIC RANGE LUMINANCE MEASUREMENTS WITH LED LIGHTING.  

E-Print Network (OSTI)

??This research investigates whether a High Dynamic Range Imaging (HDRI) technique can accurately capture luminance values of a single LED chip. Previous studies show that… (more)

Tyukhova, Yulia I.

2012-01-01T23:59:59.000Z

414

New radiochromic film densitometry system using commercially available digital camera and LEDs.  

E-Print Network (OSTI)

??This project involved designing and building a radiochromic film (RCF) densitometer using a still digital camera as the light detector and light emitting diode, LED,… (more)

Tran, T

2008-01-01T23:59:59.000Z

415

B Lifetimes and Mixing  

SciTech Connect

The Tevatron experiments, CDF and D0, have produced a wealth of new B-physics results since the start of Run II in 2001. We've observed new B-hadrons, seen new effects, and increased many-fold the precision with which we know the properties of b-quark systems. In these proceedings, we will discuss two of the most fruitful areas in the Tevatron B-physics program: lifetimes and mixing. We'll examine the experimental issues driving these analyses, present a summary of the latest results, and discuss prospects for the future.

Evans, Harold G.; /Indiana U.

2009-05-01T23:59:59.000Z

416

Span-Wise Mixing in a Multi-Stage Compressor  

NLE Websites -- All DOE Office Websites (Extended Search)

SPAN-WISE MIXING IN A MULTI-STAGE COMPRESSOR SPAN-WISE MIXING IN A MULTI-STAGE COMPRESSOR Penn State Bud Lakshminarayana (Cengiz Camci) #036 * Phenomena that have eluded gas turbine designers include the effects of rotor-stator interactions and the physics of mixing of velocity, pressure, temperature and velocity fields. * Compressor tests were conducted in a three stage compressor where deterministic unsteadiness and random fluctuations causing spanwise mixing are realistically replicated . This provided valuable information on rotor stator interaction effects and the nature of the unsteadiness. * Multi-stage compressor energy efficiency improvements are only possible by careful implementation of spanwise mixing models into modern CFD codes (Computational Fluid Dynamics) . *This investigation provided results that are extremely helpful in improving computer

417

Use Patterns of LED Flashlights in Kenya and a One-Year Cost Analysis of Flashlight Ownership  

E-Print Network (OSTI)

with torches? Failure of: ? LEDs/Bulb [1] ? Battery [2] ?http://light.lbl.gov Component Bulb Type LED Incandescentto incandescent bulbs, and low-cost LEDs have achieved price

Tracy, Jennifer

2010-01-01T23:59:59.000Z

418

Use Patterns of LED Flashlights in Kenya and a One-Year Cost Analysis of Flashlight Ownership  

E-Print Network (OSTI)

no name, i.e. number of LEDs, rechargeable/dry cell, numberthe name, i.e. number of LEDs, rechargeable/dry cell, numberno name, i.e. number of LEDs, rechargeable/dry cell, number

Tracy, Jennifer

2010-01-01T23:59:59.000Z

419

Vapochromic LED  

DOE Patents (OSTI)

A sandwich device was prepared by electrodeposition of an insoluble layer of oligomerized tris(4-(2-thienyl)phenyl)amine onto conducting indium-tin oxide coated glass, spin coating the stacked platinum compound, tetrakis(p-decylphenylisocyano)platinum tetranitroplatinate, from toluene onto the oligomer layer, and then coating the platinum complex with aluminum by vapor deposition. This device showed rectification of current and gave electroluminescence. The electroluminescence spectrum (.lambda..sub.max =545 nm) corresponded to the photoluminescence spectrum of the platinum complex. Exposure of the device to acetone vapor caused the electroemission to shift to 575 nm. Exposure to toluene vapor caused a return to the original spectrum. These results demonstrate a new type of sensor that reports the arrival of organic vapors with an electroluminescent signal. The sensor comprises (a) a first electrode; (b) a hole transport layer formed on the first electrode; (c) a sensing/emitting layer formed on the hole transport layer, the sensing/emitting layer comprising a material that changes color upon exposure to the analyte vapors; (d) an electron conductor layer formed on the sensing layer; and (e) a second electrode formed on the electron conductor layer. The hole transport layer emits light at a shorter wavelength than the sensing/emitting layer and at least the first electrode comprises an optically transparent material.

Kunugi, Yoshihito (Hiroshima, JP); Mann, Kent R. (North Oaks, MN); Miller, Larry L. (Minnetonka, MN); Exstrom, Christopher L. (Kearney, NE)

2003-06-17T23:59:59.000Z

420

Vapochromic LED  

DOE Patents (OSTI)

A sandwich device was prepared by electrodeposition of an insoluble layer of oligomerized tris(4-(2-thienyl)phenyl)amine onto conducting indium-tin oxide coated glass, spin coating the stacked platinum compound, tetrakis(p-decylphenylisocyano)platinum tetranitroplatinate, from toluene onto the oligomer layer, and then coating the platinum complex with aluminum by vapor deposition. This device showed rectification of current and gave electroluminescence. The electroluminescence spectrum (.mu..sub.max =545 nm) corresponded to the photoluminescence spectrum of the platinum complex. Exposure of the device to acetone vapor caused the electroemission to shift to 575 nm. Exposure to toluene vapor caused a return to the original spectrum. These results demonstrate a new type of sensor that reports the arrival of organic vapors with an electroluminescent signal. The sensor comprises (a) a first electrode; (b) a hole transport layer formed on the first electrode; (c) a sensing/emitting layer formed on the hole transport layer, the sensing/emitting layer comprising a material that changes color upon exposure to the analyte vapors; (d) an electron conductor layer formed on the sensing layer; and (e) a second electrode formed on the electron conductor layer. The hole transport layer emits light at a shorter wavelength than the sensing/emitting layer and at least the first electrode comprises an optically transparent material.

Kunugi, Yoshihito (Hiroshima, JP); Mann, Kent R. (North Oaks, MN); Miller, Larry L. (Minnetonka, MN); Exstrom, Christopher L. (Kearney, NE)

2002-01-15T23:59:59.000Z

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


421

The Application of Template Matching Graphic Technology in LED Chip Testing  

Science Conference Proceedings (OSTI)

A new LED chip testing system based on template matching graphic technology is developed. A LED chip is located precisely free of touch, with digital graphic disposal technology involving acquisition, orientation, segmentation of graphic, edge detection, ... Keywords: Template matching, Edge Testing, Orientation, Segmentation, Outline

Shi Wei; Wang Jianguo; Dong Zhanmin; Zhang Wenxing; Cao Liying

2011-03-01T23:59:59.000Z

422

An LED-only BRDF Measurement Device Moshe Ben-Ezra, Jiaping Wang and Bennett Wilburn  

E-Print Network (OSTI)

.edu l-ma03@mails.tsinghua.edu.cn Abstract Light Emitting Diodes (LEDs) can be used as light detec- tors to a light emitting diode (LED) was by Henry J. Round in 1907[15]. He touched a metal wire to a silicon] F. Mims III. Sun photometer with light-emitting diodes as spectrally selective detectors. Applied

Ben-Ezra, Moshe

423

Department of Electrical Engineering Spring 2012 Boeing LED Strobe Light System  

E-Print Network (OSTI)

strobe light system used by Boeing. The current Xenon bulb system is bulky, inefficient, and unreliable other light bulbs, this improves the longevity of the device Excellent frequency response of the LEDsPENNSTATE Department of Electrical Engineering Spring 2012 Boeing LED Strobe Light System Overview

Demirel, Melik C.

424

Diode (LED) Fixture Design and Installation Criteria for Interior and Exterior Lighting Applications  

E-Print Network (OSTI)

1. Purpose. This ETL provides technical guidance and criteria for specifying, designing, and installing LED luminaires for interior and exterior lighting applications at Air Force installations. This ETL does not apply to LED airfield lighting systems, including, but not limited to, taxiway, obstruction, runway edge, threshold, or approach lighting systems

unknown authors

2010-01-01T23:59:59.000Z

425

Novel Audio Amplifier System Using Opt-Coupling of LED and PD  

Science Conference Proceedings (OSTI)

This paper proposes a completely new and simple audio amplifier system using the opt-coupling of LED (Light Emitting Diode) and PD (Photo Diode), without using conventional devices such as Transistor IC and Vacuum Tube. This paper also explains that ... Keywords: audio amplifier, LED and PD, opt-coupling, distar, transistor, low noise, kansei product

Junichi Fujita, Tetsuo Hattori, Kensho Okamoto

2013-07-01T23:59:59.000Z

427

Solid-State Lighting: Text-Alternative Version: The L Prize-Winning LED A19  

NLE Websites -- All DOE Office Websites (Extended Search)

The L The L Prize-Winning LED A19 Replacement-What Commercial Building Owners/Operators Can Expect in 2012 to someone by E-mail Share Solid-State Lighting: Text-Alternative Version: The L Prize-Winning LED A19 Replacement-What Commercial Building Owners/Operators Can Expect in 2012 on Facebook Tweet about Solid-State Lighting: Text-Alternative Version: The L Prize-Winning LED A19 Replacement-What Commercial Building Owners/Operators Can Expect in 2012 on Twitter Bookmark Solid-State Lighting: Text-Alternative Version: The L Prize-Winning LED A19 Replacement-What Commercial Building Owners/Operators Can Expect in 2012 on Google Bookmark Solid-State Lighting: Text-Alternative Version: The L Prize-Winning LED A19 Replacement-What Commercial Building Owners/Operators Can Expect in 2012 on Delicious

428

Salazar, Chu to Flip Switch on Energy-Efficient LED Lights on National Mall  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

to Flip Switch on Energy-Efficient LED Lights on to Flip Switch on Energy-Efficient LED Lights on National Mall Salazar, Chu to Flip Switch on Energy-Efficient LED Lights on National Mall January 30, 2012 - 11:02am Addthis WASHINGTON, D.C.-Today, Secretary of the Interior Ken Salazar and Secretary of Energy Steven Chu will participate in a lighting ceremony featuring the newly-installed LED lights on the National Mall. Illuminating the Mall from 3rd to 15th Streets, the LED technology is expected to reduce lighting energy by up to 65 percent and provide a well-lit atmosphere to welcome the National Mall's 25 million annual visitors. "Achieving an economy built on American energy will require an all-of-the-above approach, one that includes safely and responsibly developing our domestic energy resources - and making the most of what we

429

Event:Learning and Leading on LEDS Workshop | Open Energy Information  

Open Energy Info (EERE)

Event Event Edit with form History Facebook icon Twitter icon » Event:Learning and Leading on LEDS Workshop Jump to: navigation, search Calendar.png Learning and Leading on LEDS Workshop: on 2012/02/27 The LEDS Global Partnership is convening its second annual global workshop to bring together leading practitioners from countries and international institutions to share lessons and strengthen cooperation on low emission development around the world. The workshop will convene peer learning and collaboration sessions on common topics of interest defined by the African Climate&Development Society, Asia LEDS Partnership and the LAC LEDS regional platform. The workshop will be open to participation by officials and experts from government agencies, international institutions, and

430

What Do You Think of Your LED Holiday Lights? | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Think of Your LED Holiday Lights? Think of Your LED Holiday Lights? What Do You Think of Your LED Holiday Lights? December 23, 2010 - 6:30am Addthis This year, we've been encouraging people to switch to LED light strings for their holiday decorations. With the many options for shapes, colors, and sizes, people are discovering that they like or dislike various aspects of the lights. One of the biggest things to like, of course, is the major energy savings, but some folks have also discovered that the lights have a slightly different color or reflect off of ornaments in a different way. Change can be difficult, especially when we've been seeing the same types of decorations for so many years, but we hope that you've made the switch and are enjoying the savings and festivity that LED lights can add to your

431

An Efficient LED System-in-Module for General Lighting Applications  

SciTech Connect

The objective of the project was to realize an LED-based lighting technology platform for general illumination, starting with LED chips, and integrating the necessary technologies to make compact, user-friendly, high-efficiency, energy-saving sources of controlled white (or variable-colored) light. The project is to build the system around the LEDs, and not to work on the LEDs themselves, in order that working products can be introduced soon after the LEDs reach suitable efficiency for mass-production of high-power light sources for general illumination. Because the light sources are intended for general illumination, color must be accurately maintained, requiring feedback control in the electronics. The project objective has been realized and screw base demonstrators, based on the technology developed in the project, have been built.

2008-09-14T23:59:59.000Z

432

Bottom Up and Country Led: A New Framework for Climate Action | Open Energy  

Open Energy Info (EERE)

Bottom Up and Country Led: A New Framework for Climate Action Bottom Up and Country Led: A New Framework for Climate Action Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Bottom Up and Country Led: A New Framework for Climate Action Agency/Company /Organization: Booz and Company Sector: Energy, Land, Climate Topics: Low emission development planning Resource Type: Publications Website: www.booz.com/global/home/what_we_think/reports_and_white_papers/ic-dis Cost: Free Bottom Up and Country Led: A New Framework for Climate Action Screenshot References: Bottom Up and Country Led: A New Framework for Climate Action[1] "As delegates gather for the Climate Change Conference in Cancun in late 2010, they can benefit from familiarizing themselves with the set of tools available for mitigation and adaptation, as well as how these tools can fit

433

Event:Enhancing Capacity for Low Emission Development Strategies (EC-LEDS):  

Open Energy Info (EERE)

Emission Development Strategies (EC-LEDS): Emission Development Strategies (EC-LEDS): Distributed Generation Jump to: navigation, search Calendar.png Enhancing Capacity for Low Emission Development Strategies (EC-LEDS): Distributed Generation: 1:00pm-2:00pm MST on 2012/12/20 A webinar on distributed generation, presented by the National Renewable Energy Laboratory, with funding from the U.S. Agency for International Development. This webinar will cover the basics of distributed generation, with an emphasis on renewable generation technologies and their benefits. Two case studies from the Philippines and India will be presented. Event Details Name Enhancing Capacity for Low Emission Development Strategies (EC-LEDS): Distributed Generation Date 2012/12/20 Time 1:00pm-2:00pm MST Tags LEDS, Training, CLEAN

434

What Do You Think of Your LED Holiday Lights? | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

What Do You Think of Your LED Holiday Lights? What Do You Think of Your LED Holiday Lights? What Do You Think of Your LED Holiday Lights? December 23, 2010 - 6:30am Addthis This year, we've been encouraging people to switch to LED light strings for their holiday decorations. With the many options for shapes, colors, and sizes, people are discovering that they like or dislike various aspects of the lights. One of the biggest things to like, of course, is the major energy savings, but some folks have also discovered that the lights have a slightly different color or reflect off of ornaments in a different way. Change can be difficult, especially when we've been seeing the same types of decorations for so many years, but we hope that you've made the switch and are enjoying the savings and festivity that LED lights can add to your

435

Solar LED Light Pilot Project Illuminates the Way in Alabama | Department  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

LED Light Pilot Project Illuminates the Way in Alabama LED Light Pilot Project Illuminates the Way in Alabama Solar LED Light Pilot Project Illuminates the Way in Alabama September 12, 2012 - 2:15pm Addthis Boaz, Alabama Mayor Tim Walker, along with state representatives and community leaders, cut the ribbon for the state's solar LED light pilot project. | Photo courtesy of Lionel Green, Sand Mountain Reporter. Boaz, Alabama Mayor Tim Walker, along with state representatives and community leaders, cut the ribbon for the state's solar LED light pilot project. | Photo courtesy of Lionel Green, Sand Mountain Reporter. Tertia Speiser Project Officer, Golden Field Office "I want to invite everyone to come to Boaz and see the future of responsible highway lighting and power generation." -Boaz Mayor Tim Walker

436

Top 8 Things You Didn't Know About LEDs | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

8 Things You Didn't Know About LEDs 8 Things You Didn't Know About LEDs Top 8 Things You Didn't Know About LEDs June 4, 2013 - 9:20am Addthis Using funding from the Energy Department, Philips Lumileds developed the LUXEON S1000 -- a commercial LED product used in outdoor street and parking lot lighting. While small, this chip is the heart of the light and as of June 2012 was brighter than a 60-watt light bulb. | Photo courtesy of Philips Lumileds. Using funding from the Energy Department, Philips Lumileds developed the LUXEON S1000 -- a commercial LED product used in outdoor street and parking lot lighting. While small, this chip is the heart of the light and as of June 2012 was brighter than a 60-watt light bulb. | Photo courtesy of Philips Lumileds. Rebecca Matulka Rebecca Matulka Digital Communications Specialist, Office of Public Affairs

437

Top 8 Things You Didn't Know About LEDs | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

LEDs LEDs Top 8 Things You Didn't Know About LEDs June 4, 2013 - 9:20am Addthis Using funding from the Energy Department, Philips Lumileds developed the LUXEON S1000 -- a commercial LED product used in outdoor street and parking lot lighting. While small, this chip is the heart of the light and as of June 2012 was brighter than a 60-watt light bulb. | Photo courtesy of Philips Lumileds. Using funding from the Energy Department, Philips Lumileds developed the LUXEON S1000 -- a commercial LED product used in outdoor street and parking lot lighting. While small, this chip is the heart of the light and as of June 2012 was brighter than a 60-watt light bulb. | Photo courtesy of Philips Lumileds. Rebecca Matulka Rebecca Matulka Digital Communications Specialist, Office of Public Affairs

438

Gabon-Enhancing Capacity for Low Emission Development Strategies (EC-LEDS)  

Open Energy Info (EERE)

Gabon-Enhancing Capacity for Low Emission Development Strategies (EC-LEDS) Gabon-Enhancing Capacity for Low Emission Development Strategies (EC-LEDS) Jump to: navigation, search Name Gabon-Enhancing Capacity for Low Emission Development Strategies (EC-LEDS) Agency/Company /Organization United States Agency for International Development, United States Environmental Protection Agency, United States Department of Energy, United States Department of Agriculture, United States Department of State Sector Climate, Energy, Land Focus Area Buildings, Economic Development, Energy Efficiency, Forestry, Land Use Topics Co-benefits assessment, GHG inventory, Low emission development planning, -LEDS Country Gabon Middle Africa References EC-LEDS[1] Contents 1 Overview 2 Framework 3 Lessons Learned and Good Practices 4 Progress and Outcomes

439

Solar LED Light Pilot Project Illuminates the Way in Alabama | Department  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Solar LED Light Pilot Project Illuminates the Way in Alabama Solar LED Light Pilot Project Illuminates the Way in Alabama Solar LED Light Pilot Project Illuminates the Way in Alabama September 12, 2012 - 2:15pm Addthis Boaz, Alabama Mayor Tim Walker, along with state representatives and community leaders, cut the ribbon for the state's solar LED light pilot project. | Photo courtesy of Lionel Green, Sand Mountain Reporter. Boaz, Alabama Mayor Tim Walker, along with state representatives and community leaders, cut the ribbon for the state's solar LED light pilot project. | Photo courtesy of Lionel Green, Sand Mountain Reporter. Tertia Speiser Project Officer, Golden Field Office "I want to invite everyone to come to Boaz and see the future of responsible highway lighting and power generation." -Boaz Mayor Tim Walker

440

Novel fused-LEDs devices as optical sensors for colorimetric analysis  

E-Print Network (OSTI)

The development of a novel, low power optical sensing platform based on light emitting diodes (LEDs) is described. The sensor is constructed from a pair of LEDs fused together at an angle where one LED functions as the light source and the other LED is reverse biased to function as a light detector. Sensor function is based on the level of light received by the detector diode, which varies with the reflectance of the interface between the device and its environment, or the chemochromic membrance that covers the device. A simple microprocessor circuit is used to measure the time taken for the photon-induced current to discharge the detector LED from an initial 5V (logic 1) to 1.7V (logic zero). This sensing device has been successfully used for colour and colour-based pH measurements and offers extremely high sensitivity, enabling detection down to the sub micro molar level of dyes.

King Tong Lau; Susan Baldwin; Roderick L. Shepherd; Paul H. Dietz; William S. Yerazunis; Dermot Diamond; King Tong Lau A; Susan Baldwin A; Roderick L. Shepherd B; Paul H. Dietz B; William S. Yerzunis B; Dermot Diamond A

2004-01-01T23:59:59.000Z

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


441

Magical Mystery Devices or Not: How do LED Lamps and Luminaires Really Measure-Up?  

SciTech Connect

Solid-state lighting products for general lighting applications are now gaining a market presence, and more and more people are asking, “Which of these are ‘good’ products? Do they perform as claimed? How do they compare? Light Emitting Diodes (LEDs) differ from other light sources enough to require new procedures for measuring their performance and comparing to other lighting options, so both manufacturers and buyers are facing a learning curve. The energy-efficiency community has traditionally compared light sources based on system efficacy: rated lamp lumens divided by power into the system. This doesn’t work for LEDs because there are no standard LED “lamp” packages and no lamp ratings, and because LED performance depends heavily on thermal, electrical, and optical design of complete lighting unit or ‘luminaire’. Luminaire efficacy is the preferred metric for LEDs because it measures the net light output from the luminaire divided by power into the system.

Paget, Maria L.; McCullough, Jeffrey J.; Steward, Heidi E.

2008-08-15T23:59:59.000Z

442

ARM - Measurement - Virtual temperature  

NLE Websites -- All DOE Office Websites (Extended Search)

govMeasurementsVirtual temperature govMeasurementsVirtual temperature ARM Data Discovery Browse Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Measurement : Virtual temperature The virtual temperature Tv = T(1 + rv/{epsilon}), where rv is the mixing ratio, and {epsilon} is the ratio of the gas constants of air and water vapor ( 0.622). Categories Atmospheric State Instruments The above measurement is considered scientifically relevant for the following instruments. Refer to the datastream (netcdf) file headers of each instrument for a list of all available measurements, including those recorded for diagnostic or quality assurance purposes. ARM Instruments CO2FLX : Carbon Dioxide Flux Measurement Systems MWRP : Microwave Radiometer Profiler RWP : Radar Wind Profiler

443

fuel mix | OpenEI  

Open Energy Info (EERE)

mix mix Dataset Summary Description The UK Department of Energy and Climate Change (DECC) publishes an annual "fuel mix disclosure data table" as defined in the Electricity (Fuel Mix Disclosure) Regulations 2005. This dataset represents April 1, 2009 - March 31, 2010. Source UK Department of Energy and Climate Change (DECC) Date Released March 31st, 2010 (4 years ago) Date Updated Unknown Keywords fuel mix UK Data application/vnd.openxmlformats-officedocument.spreadsheetml.sheet icon UK.fuel_.mix_.disclosure.4.2009.4.2010.xlsx (xlsx, 38.2 KiB) Quality Metrics Level of Review Some Review Comment Temporal and Spatial Coverage Frequency Time Period License License Other or unspecified, see optional comment below Comment UK Open Government License (OGL)

444

Parking Savings Through LED Project for Iowa City | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Parking Savings Through LED Project for Iowa City Parking Savings Through LED Project for Iowa City Parking Savings Through LED Project for Iowa City July 15, 2010 - 1:15pm Addthis Joshua DeLung What does this project do? Iowa City combines State Energy Program 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 annually. Iowa City's $1.2 million LED project is expected to save the city about $5,000 each month from changing out old, metal halide light fixtures for LED lights. The cost of the project was partially covered by a $419,000 grant from the U.S. Department of Energy's State Energy Program and a $45,000 rebate from MidAmerican Energy, the local utility company. Brightening the future The LEDs being installed in Iowa City use less energy than normal light

445

Manufacturer's Mixed Pallet Design Problem  

E-Print Network (OSTI)

fore, the company decided to design a number of mixed or “rainbow” pallets so that its customers can order ...... Squeezing out waste of space. 62, 5, page 112.

446

Fuel Mix and Emissions Disclosure  

Energy.gov (U.S. Department of Energy (DOE))

As part of the state's 1997 electric utility restructuring legislation, Illinois established provisions for the disclosure of fuel mix and emissions data. All electric utilities and alternative...

447

Fuel Mix and Emissions Disclosure  

Energy.gov (U.S. Department of Energy (DOE))

Oregon's 1999 electric utility restructuring legislation requires electricity companies and electric service suppliers to disclose details regarding their fuel mix and emissions of electric...

448

Quality and Performance of LED Flashlights in Kenya: Common End User Preferences and Complaints  

SciTech Connect

Flashlights that use LED technology have quickly emerged as the dominant source of portable lighting in Kenya. While flashlights do not normally provide a substitute for kerosene and other highly inefficient fuels, they are an important early manifestation of LED lighting in the developing world that can serve as a platform - or deterrent - to the diffusion of the technology into the broader off-grid lighting market. The lead acid batteries embedded in flashlights also represent an important source of hazardous waste, and flashlight durability is thus an important determinant of the rate of waste disposal. Low-cost LED flashlights with prices from $1 to $4 are now widely available in shops and markets throughout Kenya. The increased penetration of LED technology in the flashlight market is significant, as over half of all Kenyan households report owning a flashlight (Kamfor, 2002). While this shift from conventional incandescent technology to modern LEDs may appear to be a promising development, end users that our research team interviewed expressed a number of complaints about the quality and performance of these new flashlights. This raises concerns about the interests of low-income flashlight users, and it may also indicate the onset of a broader market spoiling effect for off-grid lighting products based on LED technology (Mills and Jacobson, 2008; Lighting Africa, 2007). The quality of low-cost LED flashlights can contribute to market spoiling because these products appear to represent the first contact that most Kenyans have with LED technology. In this report, our team uses interviews with 46 end users of flashlights to collect information about their experiences, perceptions, and preferences. We focus especially on highlighting common complaints from respondents about the flashlights that they have used, as well as on noting the features that they indicated were important when evaluating the quality of a flashlight. In previous laboratory tests, researchers from our team found a wide range of quality and performance among battery powered LED lights (Granderson, et al. 2008).

Tracy, Jenny; Jacobson, Arne; Mills, Evan

2009-09-14T23:59:59.000Z

449

Kenya-EC-LEDS in the Agriculture Sector | Open Energy Information  

Open Energy Info (EERE)

Page Page Edit with form History Facebook icon Twitter icon » Kenya-EC-LEDS in the Agriculture Sector Jump to: navigation, search Name Kenya-EC-LEDS in the Agriculture Sector Agency/Company /Organization United States Department of Agriculture, United States Department of State Partner Ministry of Agriculture, Ministry of Environment Sector Climate, Land Focus Area Agriculture, Economic Development, Greenhouse Gas, Land Use Topics Adaptation, Implementation, Low emission development planning, -LEDS, Policies/deployment programs Program Start 2011 Program End 2013 Country Kenya Eastern Africa References Land Use Assessment Toolkit - Agriculture Resources[1] Overview Progress and Outcomes Capacity building activities include strengthening implementation of

450

Program Led by EM's Carlsbad Field Office Joins Emergency Response in  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Program Led by EM's Carlsbad Field Office Joins Emergency Response Program Led by EM's Carlsbad Field Office Joins Emergency Response in National Exercise Program Led by EM's Carlsbad Field Office Joins Emergency Response in National Exercise October 30, 2013 - 12:00pm Addthis Hnin Khaing of WIPP Laboratories checks a radiological sample, similar to what would be analyzed in an event like the one simulated in the exercise to test national readiness to respond to a large radiological event. Hnin Khaing of WIPP Laboratories checks a radiological sample, similar to what would be analyzed in an event like the one simulated in the exercise to test national readiness to respond to a large radiological event. CARLSBAD, N.M. - For the first time, a program led by EM's Carlsbad Field Office (CBFO) that coordinates analytical capabilities throughout DOE

451

Shining Energy-saving LEDs on Utah Starry Nights | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Shining Energy-saving LEDs on Utah Starry Nights Shining Energy-saving LEDs on Utah Starry Nights Shining Energy-saving LEDs on Utah Starry Nights June 11, 2010 - 4:27pm Addthis Stephen Graff Former Writer & editor for Energy Empowers, EERE Utah is known for its magnificent night skies, where stargazers can catch a glimpse of constellations or a rogue shooting star. Now some rural towns have found a way to create even better views-and conserve energy. This summer, thanks to an Energy Efficiency and Conservation Block Grant (EECBG) from the Utah State Energy Program worth over $1 million, 14 rural communities across the state are replacing streetlights with efficient light-emitting diodes (LEDs). About 2,500 streetlights will be replaced and could save the towns 20 percent to 50 percent on electricity bills.

452

Measuring response of extruded scintillator to UV LED in magnetic field  

SciTech Connect

The experimental results on the performance of the extruded scintillator and WLS fiber, and various LEDs in the magnetic fields of 1.8T and 2.3T respectively, are reported. The methodic used is being described.

Beznosko, D.; Blazey, G.; Dyshkant, A.; Francis, K.; Kubik, D.; Rykalin, V.; /Northern Illinois U.; Tartaglia, M.; /Fermilab; Zutshi, V.; /Northern Illinois U.

2005-05-01T23:59:59.000Z

453

Shining Energy-saving LEDs on Utah Starry Nights | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Shining Energy-saving LEDs on Utah Starry Nights Shining Energy-saving LEDs on Utah Starry Nights Shining Energy-saving LEDs on Utah Starry Nights June 11, 2010 - 4:27pm Addthis Stephen Graff Former Writer & editor for Energy Empowers, EERE Utah is known for its magnificent night skies, where stargazers can catch a glimpse of constellations or a rogue shooting star. Now some rural towns have found a way to create even better views-and conserve energy. This summer, thanks to an Energy Efficiency and Conservation Block Grant (EECBG) from the Utah State Energy Program worth over $1 million, 14 rural communities across the state are replacing streetlights with efficient light-emitting diodes (LEDs). About 2,500 streetlights will be replaced and could save the towns 20 percent to 50 percent on electricity bills.

454

Vietnam-EC-LEDS in the Agriculture Sector | Open Energy Information  

Open Energy Info (EERE)

Vietnam-EC-LEDS in the Agriculture Sector Vietnam-EC-LEDS in the Agriculture Sector Jump to: navigation, search Name Vietnam-EC-LEDS in the Agriculture Sector Agency/Company /Organization United States Department of Agriculture, United States Department of State Partner Ministry of Agriculture, Ministry of Environment Sector Climate, Land Focus Area Agriculture, Economic Development, Greenhouse Gas, Land Use Topics Adaptation, Implementation, Low emission development planning, -LEDS, Policies/deployment programs Program Start 2011 Program End 2013 Country Vietnam South-Eastern Asia References Land Use Assessment Toolkit - Agriculture Resources[1] Overview Progress and Outcomes Capacity building activities include strengthening implementation of climate change policies, development of climate change policies, and

455

Deputy Secretary Poneman Announces Team led by Oak Ridge National Lab  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Announces Team led by Oak Ridge National Announces Team led by Oak Ridge National Lab Selected to Receive up to $122 Million for Nuclear Energy Innovation Hub Deputy Secretary Poneman Announces Team led by Oak Ridge National Lab Selected to Receive up to $122 Million for Nuclear Energy Innovation Hub May 28, 2010 - 12:00am Addthis WASHINGTON, D.C. - As part of a broad effort to spur innovation and achieve clean energy breakthroughs, U.S. Deputy Secretary of Energy Daniel Poneman today announced the selection of a team led by Oak Ridge National Laboratory (ORNL) for an award of up to $122 million over five years to establish and operate a new Nuclear Energy Modeling and Simulation Energy Innovation Hub. The Hub, which includes partners from universities, industry and other national labs, will use advanced capabilities of the

456

UNDP-Costa Rica Regional Programme for LAC - Preparation of Sectoral LEDs  

Open Energy Info (EERE)

Rica Regional Programme for LAC - Preparation of Sectoral LEDs Rica Regional Programme for LAC - Preparation of Sectoral LEDs for transport and agriculture Jump to: navigation, search Name UNDP-Costa Rica Regional Programme for LAC - Preparation of Sectoral LEDs for transport and agriculture Agency/Company /Organization United Nations Development Programme (UNDP) Sector Climate, Energy Focus Area Agriculture, Transportation Topics Low emission development planning, -LEDS Country Costa Rica Central America References UNDP - Latin America & the Caribbean[1] Contents 1 Program Overview 1.1 Program Focus 1.2 Environment and Sustainable Development 2 References Program Overview "Across Latin America and the Caribbean, UNDP helps countries build and share their own solutions to urgent development challenges, supporting

457

Team Led by Argonne National Lab Selected as DOE's Batteries and Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Team Led by Argonne National Lab Selected as DOE's Batteries and Team Led by Argonne National Lab Selected as DOE's Batteries and Energy Storage Hub Team Led by Argonne National Lab Selected as DOE's Batteries and Energy Storage Hub November 30, 2012 - 12:15pm Addthis NEWS MEDIA CONTACT (202) 586-4940 WASHINGTON - U.S. Secretary of Energy Steven Chu was joined today by Senator Dick Durbin, Illinois Governor Pat Quinn, and Chicago Mayor Rahm Emanuel to announce that a multi-partner team led by Argonne National Laboratory has been selected for an award of up to $120 million over five years to establish a new Batteries and Energy Storage Hub. The Hub, to be known as the Joint Center for Energy Storage Research (JCESR), will combine the R&D firepower of five DOE national laboratories, five universities, and four private firms in an effort aimed at achieving revolutionary advances

458

Secretary Chu Announces $38 Million for 42 University-Led Nuclear Research  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

8 Million for 42 University-Led Nuclear 8 Million for 42 University-Led Nuclear Research and Development Projects Secretary Chu Announces $38 Million for 42 University-Led Nuclear Research and Development Projects May 20, 2010 - 12:00am Addthis Washington, D.C. - U.S. Secretary of Energy Steven Chu today announced the selection of 42 university-led research and development projects for awards totaling $38 million. These projects, funded over three to four years through the Department's Nuclear Energy University Program, will help advance nuclear education and develop the next generation of nuclear technologies. "We are taking action to restart the nuclear industry as part of a broad approach to cut carbon pollution and create new clean energy jobs," said Secretary Chu. "These projects will help us develop the nuclear

459

Costa Rica-Regional Programme for LAC: Preparation of Sectoral LEDs for  

Open Energy Info (EERE)

Costa Rica-Regional Programme for LAC: Preparation of Sectoral LEDs for Costa Rica-Regional Programme for LAC: Preparation of Sectoral LEDs for Transport and Agriculture Jump to: navigation, search Name UNDP-Costa Rica Regional Programme for LAC - Preparation of Sectoral LEDs for transport and agriculture Agency/Company /Organization United Nations Development Programme (UNDP) Sector Climate, Energy Focus Area Agriculture, Transportation Topics Low emission development planning, -LEDS Country Costa Rica Central America References UNDP - Latin America & the Caribbean[1] Contents 1 Program Overview 1.1 Program Focus 1.2 Environment and Sustainable Development 2 References Program Overview "Across Latin America and the Caribbean, UNDP helps countries build and share their own solutions to urgent development challenges, supporting

460

Solid-State Lighting: Text-Alternative Version: LED Site Lighting in the  

NLE Websites -- All DOE Office Websites (Extended Search)

Site Lighting in the Commercial Building Sector: Opportunities, Challenges, Site Lighting in the Commercial Building Sector: Opportunities, Challenges, and the CBEA Performance Specification to someone by E-mail Share Solid-State Lighting: Text-Alternative Version: LED Site Lighting in the Commercial Building Sector: Opportunities, Challenges, and the CBEA Performance Specification on Facebook Tweet about Solid-State Lighting: Text-Alternative Version: LED Site Lighting in the Commercial Building Sector: Opportunities, Challenges, and the CBEA Performance Specification on Twitter Bookmark Solid-State Lighting: Text-Alternative Version: LED Site Lighting in the Commercial Building Sector: Opportunities, Challenges, and the CBEA Performance Specification on Google Bookmark Solid-State Lighting: Text-Alternative Version: LED Site

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


461

Program Led by EM's Carlsbad Field Office Joins Emergency Response in  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Program Led by EM's Carlsbad Field Office Joins Emergency Response Program Led by EM's Carlsbad Field Office Joins Emergency Response in National Exercise Program Led by EM's Carlsbad Field Office Joins Emergency Response in National Exercise October 30, 2013 - 12:00pm Addthis Hnin Khaing of WIPP Laboratories checks a radiological sample, similar to what would be analyzed in an event like the one simulated in the exercise to test national readiness to respond to a large radiological event. Hnin Khaing of WIPP Laboratories checks a radiological sample, similar to what would be analyzed in an event like the one simulated in the exercise to test national readiness to respond to a large radiological event. CARLSBAD, N.M. - For the first time, a program led by EM's Carlsbad Field Office (CBFO) that coordinates analytical capabilities throughout DOE

462

Deputy Secretary Poneman Announces Team led by Oak Ridge National Lab  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Deputy Secretary Poneman Announces Team led by Oak Ridge National Deputy Secretary Poneman Announces Team led by Oak Ridge National Lab Selected to Receive up to $122 Million for Nuclear Energy Innovation Hub Deputy Secretary Poneman Announces Team led by Oak Ridge National Lab Selected to Receive up to $122 Million for Nuclear Energy Innovation Hub May 28, 2010 - 12:05pm Addthis WASHINGTON, D.C. - As part of a broad effort to spur innovation and achieve clean energy breakthroughs, U.S. Deputy Secretary of Energy Daniel Poneman today announced the selection of a team led by Oak Ridge National Laboratory (ORNL) for an award of up to $122 million over five years to establish and operate a new Nuclear Energy Modeling and Simulation Energy Innovation Hub. The Hub, which includes partners from universities, industry and other national labs, will use advanced capabilities of the

463

Secretary Chu Announces $38 Million for 42 University-Led Nuclear Research  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

$38 Million for 42 University-Led Nuclear $38 Million for 42 University-Led Nuclear Research and Development Projects Secretary Chu Announces $38 Million for 42 University-Led Nuclear Research and Development Projects May 20, 2010 - 12:05pm Addthis WASHINGTON, D.C. - U.S. Secretary of Energy Steven Chu today announced the selection of 42 university-led research and development projects for awards totaling $38 million. These projects, funded over three to four years through the Department's Nuclear Energy University Program, will help advance nuclear education and develop the next generation of nuclear technologies. "We are taking action to restart the nuclear industry as part of a broad approach to cut carbon pollution and create new clean energy jobs," said Secretary Chu. "These projects will help us develop the nuclear

464

Integrated System Of White Led Visible-Light Communication And Power-Line Communication  

E-Print Network (OSTI)

White LEDs offer advantageous properties such as high brightness, reliability, lower power consumption and long lifetime. The biggest potential application for white LEDs will be general illumination and lighting. Indoor wireless optical communication systems employing white LED lighting have been proposed. This system will enable high QoS by the high power from this lighting equipment. But, it is difficult for existing offices communication using existing power-line is proposed. This system is emitted as visible-light from LED lighting according to the transmitted signal waveform without demodulating the signal from the power-line. This system is expected to be applicable from the existing illuminant easily like exchanging electric bulbs. This integrated system will surely have a big impact as a new signal transmission system and its economical effect will be great. The basic performance of this system is analyzed. The actual system is built and its feasibility is shown through experiments.

Toshihiko Komine; Masao Nakagawa

2002-01-01T23:59:59.000Z

465

Dimming LEDs with Phase-Cut Dimmers: The Specifier's Process for Maximizing Success  

SciTech Connect

This report reviews how phase-cut dimmers work, how LEDs differ from the incandescent lamps that the dimmers were historically designed to control, and how these differences can lead to complications when trying to dim LEDs. Compatibility between a specific LED source and a specific phase-cut dimmer is often unknown and difficult to assess, and ensuring compatibility adds complexity to the design, specification, bidding, and construction observation phases for new buildings and major remodel projects. To maximize project success, this report provides both general guidance and step-by-step procedures for designing phase-controlled LED dimming on both new and existing projects, as well as real-world examples of how to use those procedures.

Miller, Naomi J.; Poplawski, Michael E.

2013-10-01T23:59:59.000Z

466

JJ2, Optical Polarization of Non-Polar GaInN/GaN LEDs  

Science Conference Proceedings (OSTI)

I4, Electrical Spin Injection in a Hybrid Organic/Inorganic Spin-Polarized Light Emitting Diode (Spin-LED) · I5, Properties of MnAs/GaMnAs/MnAs Magnetic ...

467

Top 8 Things You Didn't Know About LEDs | Department of Energy  

NLE Websites -- All DOE Office Websites (Extended Search)

You Didn't Know About..." Be sure to check back for more entries soon. 8. A light-emitting diode, or LED, is a type of solid-state lighting that uses a semiconductor to convert...

468

Psychophysical evaluations of modulated color rendering for energy performance of LED-based architectural lighting  

E-Print Network (OSTI)

This thesis is focused on the visual perception evaluation of colors within an environment of a highly automated lighting control strategy. Digitally controlled lighting systems equipped with light emitting diodes, LEDs, ...

Thompson, Maria do Rosário

2007-01-01T23:59:59.000Z

469

CANCELLED: Power to the People: A Consumer-Led Revolution in...  

NLE Websites -- All DOE Office Websites (Extended Search)

CANCELLED: Power to the People: A Consumer-Led Revolution in Energy Management Speaker(s): Scott McGaraghan Date: December 9, 2011 - 12:00pm Location: 90-3122 Seminar HostPoint of...

470

Unique PPPL-led workshop assesses research crucial to the success...  

NLE Websites -- All DOE Office Websites (Extended Search)

Unique PPPL-led workshop assesses research crucial to the success of ITER By John Greenwald July 30, 2013 Tweet Widget Facebook Like Google Plus One Workshop participants from...

471

Power to the People: A Consumer-Led Revolution in Energy Management  

NLE Websites -- All DOE Office Websites (Extended Search)

Power to the People: A Consumer-Led Revolution in Energy Management Speaker(s): Scott McGaraghan Date: July 10, 2012 - 12:00pm Location: 90-3122 Seminar HostPoint of Contact:...

472

PPPL-led researchers seek to demonstrate a novel design for a...  

NLE Websites -- All DOE Office Websites (Extended Search)

PPPL-led researchers seek to demonstrate a novel design for a key diagnostic tool for ITER By John Greenwald April 13, 2012 Tweet Widget Facebook Like Google Plus One Dave Johnson...

473

Student-Led Conferences| Perceptions Held By Parents of Children Attending a Christian Elementary School.  

E-Print Network (OSTI)

?? This concurrent multiple methods study was to inform the work at Ontario Christian School (OCS) related to student-led conferences in grades K-3rd during the… (more)

Foster King, Angele'

2011-01-01T23:59:59.000Z

474

Solid-State Lighting: Webinar: The L Prize-Winning LED A19Replacement...  

NLE Websites -- All DOE Office Websites (Extended Search)

Webinar: The L Prize-Winning LED A19 Replacement-What Commercial Building OwnersOperators Can Expect in 2012 to someone by E-mail Share Solid-State Lighting: Webinar: The L...

475

Secretary Chu Announces $38 Million for 42 University-Led Nuclear...  

NLE Websites -- All DOE Office Websites (Extended Search)

Secretary Chu Announces 38 Million for 42 University-Led Nuclear Research and Development Projects Washington, D.C. - U.S. Secretary of Energy Steven Chu today announced the...

476

IntenCity - 2 Solid State Outdoor Luminaire SL-3200 High Output LED Street Light  

Science Conference Proceedings (OSTI)

The product under assessment is an advanced lighting technology8212a solid state outdoor luminarie light emitting diode (LED) street lighting system designed to provide various levels of direct white light.

2008-06-12T23:59:59.000Z

477

Deposition of colloidal quantum dots by microcontact printing for LED display technology  

E-Print Network (OSTI)

This thesis demonstrates a new deposition method of colloidal quantum dots within a quantum dot organic light-emitting diode (QD-LED). A monolayer of quantum dots is microcontact printed as small as 20 ,Lm lines as well ...

Kim, LeeAnn

2006-01-01T23:59:59.000Z

478

Transcranial LED therapy for cognitive dysfunction in chronic, mild traumatic brain injury: Two case reports  

E-Print Network (OSTI)

Two chronic, traumatic brain injury (TBI) cases are presented, where cognitive function improved following treatment with transcranial light emitting diodes (LEDs). At age 59, P1 had closed-head injury from a motor vehicle ...

Hamblin, Michael R.

479

Mixing in Symmetric Holmboe Waves  

Science Conference Proceedings (OSTI)

Direct simulations are used to study turbulence and mixing in Holmboe waves. Previous results showing that mixing in Holmboe waves is comparable to that found in the better-known Kelvin–Helmholtz (KH) billows are extended to cover a range of ...

W. D. Smyth; J. R. Carpenter; G. A. Lawrence

2007-06-01T23:59:59.000Z

480

The use of LEDS (light-emitting diode) to simulate weak YAG-laser beams  

SciTech Connect

The purpose of this report is to determine whether and under what conditions a light-emitting diode may be used to simulate a weak YAG-laser beam that has been scattered by a distant reflecting object. By examining the differences between laser radiation and LED radiation, the author concludes that there is no theoretical reason that a LED may not be used in place of the laser beam.

Young, M.

1981-01-01T23:59:59.000Z

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


481

Comparing Light Emitting Diode (LED) Street and Area Lighting to Traditional Lighting Technologies  

Science Conference Proceedings (OSTI)

High-power light-emitting diode (LED) technology holds great promise for outdoor illumination. This case study discusses the results of the LED Street and Area Lighting Demonstration performed by Tennessee Valley Authority (TVA), Knoxville Utilities Board (KUB), and EPRI. Data was collected on Wall Avenue, a busy thoroughfare in downtown Knoxville, using a specially developed computer-controlled mobile light measurement vehicle with a global positioning system.Early reports from the ...

2012-09-28T23:59:59.000Z

482

Comparing Light-Emitting Diode (LED) Street and Area Lighting to Traditional Lighting Technologies  

Science Conference Proceedings (OSTI)

Manufacturing advances have now made the use of light-emitting diode (LED) technology practical for street and area lighting. To better understand the application, the Electric Power Research Institute (EPRI) teamed with Southern Company and Alabama Power to install LED street lights at a demonstration site and measure the performance. The data showed several disadvantages such as a lower efficacy compared to traditional technology and lower immunity to electrical disturbances, but advantages in energy s...

2012-04-20T23:59:59.000Z

483

Comparing Light-Emitting Diode (LED) Street and Area Lighting to Traditional Lighting Technologies  

Science Conference Proceedings (OSTI)

In 2008, the Tennessee Valley Authority (TVA) and Benton County Electric System partnered with the Electric Power Research Institute (EPRI) to launch an investigation into the use of LED technology for area lighting. The goal of the project—called the LED Street and Area Lighting Demonstration—was to discover a better light bulb, one that not only meets the outdoor lighting requirements of consumers, but also uses less electricity in doing so. This case study discusses the results of ...

2012-09-28T23:59:59.000Z

484

Billiards with polynomial mixing rates  

E-Print Network (OSTI)

While many dynamical systems of mechanical origin, in particular billiards, are strongly chaotic -- enjoy exponential mixing, the rates of mixing in many other models are slow (algebraic, or polynomial). The dynamics in the latter are intermittent between regular and chaotic, which makes them particularly interesting in physical studies. However, mathematical methods for the analysis of systems with slow mixing rates were developed just recently and are still difficult to apply to realistic models. Here we reduce those methods to a practical scheme that allows us to obtain a nearly optimal bound on mixing rates. We demonstrate how the method works by applying it to several classes of chaotic billiards with slow mixing as well as discuss a few examples where the method, in its present form, fails.

Nikolai Chernov; Hong-Kun Zhang

2004-09-12T23:59:59.000Z

485

Determination of Vertical Thermal Structure from Sea Surface Temperature  

Science Conference Proceedings (OSTI)

A recently developed parametric model by P. C. Chu et al. is used in this paper for determining subsurface thermal structure from satellite sea surface temperature observations. Based on a layered structure of temperature fields (mixed layer, ...

Peter C. Chu; Chenwu Fan; W. Timothy Liu

2000-07-01T23:59:59.000Z

486

Temperature, Humidity, and Wind at the Global Tropopause  

Science Conference Proceedings (OSTI)

This study presents global statistics of tropopause parameters for a 15-yr period (1979–93). The parameters are height, temperature, potential temperature, mixing ratio of water vapor, and zonal, meridional and vertical wind. The global ...

Klaus P. Hoinka

1999-10-01T23:59:59.000Z

487

Information Resources: Webinar: The L Prize-Winning LED A19  

NLE Websites -- All DOE Office Websites (Extended Search)

Webinar: The L Prize-Winning LED A19 Replacement-What Commercial Building Owners/Operators Can Expect in 2012 Webinar: The L Prize-Winning LED A19 Replacement-What Commercial Building Owners/Operators Can Expect in 2012 This January 18, 2012 webinar presented an update on the status of LED A19 lamp options for commercial businesses, with an overview of DOE's L Prize competition and the rigorous lab, lifetime, and field testing that went into selection of the winning lamp. During the webinar, Kelly Gordon of Pacific Northwest National Laboratory presented current A19 LED options and provided details on where LEDs are most competitive and ready. Gordon also shared insights on the L Prize competition winner, the role of partners in market development, and preliminary plans for promotions and incentives. Todd Manegold, Director of LED Lamps Marketing at Philips Lighting, outlined best applications for the winning lamp in commercial settings, Philips' plans for commercial distribution, and a financial calculator showing expected cost/payback using actual examples from field tests.

488

Assessment of LED Technology in Ornamental Post-Top Luminaires (Host Site: Sacramento, CA)  

Science Conference Proceedings (OSTI)

The DOE Municipal Solid-State Street Lighting Consortium has evaluated four different LED replacements for existing ornamental post-top street lights in Sacramento, California. The project team was composed of the City and its consultant, PNNL (representing the Consortium), and the Sacramento Municipal Utility District. Product selection was finalized in March 2011, yielding one complete luminaire replacement and three lamp-ballast retrofit kits. Computer simulations, field measurements, and laboratory testing were performed to compare the performance and cost-effectiveness of the LED products relative to the existing luminaire with 100 W high-pressure sodium lamp. After it was confirmed the LED products were not equivalent to HPS in terms of initial photopic illumination, the following parameters were scaled proportionally to enable equitable (albeit hypothetical) comparisons: light output, input wattage, and pricing. Four replacement scenarios were considered for each LED product, incorporating new IES guidance for mesopic multipliers and lumen maintenance extrapolation, but life cycle analysis indicated cost effectiveness was also unacceptable. Although LED efficacy and pricing continue to improve, this project serves as a timely and objective notice that LED technology may not be quite ready yet for such applications.

Tuenge, Jason R.

2011-12-01T23:59:59.000Z

489

Towards a Characterization of Arctic Mixed-Phase Clouds  

NLE Websites -- All DOE Office Websites (Extended Search)

Towards a Characterization of Arctic Mixed-Phase Clouds Towards a Characterization of Arctic Mixed-Phase Clouds Shupe, Matthew CIRES/NOAA/ETL Kollias, Pavlos Brookhaven National Laboratory Category: Cloud Properties Mixed-phase clouds play a unique role in the Arctic, where the delicate balance of phases in these clouds can have a profound impact on the surface radiation balance and various cloud-atmosphere-radiation-surface feedback processes. A better understanding of these clouds is clearly important and has been a recent objective of the ARM program. To this end, multiple sensors including radar, lidar, and temperature soundings, have been utilized in an automated cloud type classification scheme for clouds observed at the North Slope of Alaska site. The performance of this new algorithm at identifying mixed-phase cloud conditions is compared with an

490

Using large eddy simulations to understand flow mixing | Argonne National  

NLE Websites -- All DOE Office Websites (Extended Search)

large eddy simulations to understand flow mixing large eddy simulations to understand flow mixing March 4, 2013 Tweet EmailPrint In nuclear power plants, turbulent flow streams of different velocity and density mix rapidly at right angles in pipes. If those mixing flow streams are of different temperatures, thermal fluctuations result on the pipe wall. Such fluctuations can damage a pipe's structure and, ultimately, cause its failure. To better understand this phenomenon and to predict the effects, scientists have developed modeling methods known as large eddy simulations (LES). LES models only the energy-carrying large scales of motion, using a filtering mechanism to account for subgrid-scale motion. Thanks to recent advances in high-performance computing, the technique has become increasingly popular for simulating unsteady flows, allowing high fidelity

491

Illuminating the Pecking Order in Off-Grid Lighting: A Demonstration of LED Lighting for Saving Energy in the Poultry Sector  

E-Print Network (OSTI)

Fluorescent Solar Portable LED Capital Cost (Ksh) Capital4. Fluorescent house. Figure 5. LED house. When the chickensgrowth rates. However, the LED system produced the most

Tracy, Jennifer

2012-01-01T23:59:59.000Z

492

A Demonstration of LED Lighting for Saving Energy in the Poultry Sector  

DOE Green Energy (OSTI)

The Lumina Project and Lighting Africa conducted a full-scale field test involving a switch from kerosene to solar-LED lighting for commercial broiler chicken production at an off-grid farm in Kenya. The test achieved lower operating costs, produced substantially more light, improved the working environment, and had no adverse effect on yields. A strategy using conventional solar-fluorescent lighting also achieved comparable yields, but entailed a six-fold higher capital cost and significantly higher recurring battery replacement costs. Thanks to higher energy and optical efficiencies, the LED system provided approximately twice the illumination to the chicken-production area and yet drew less than half the power.At the study farm, 3000 chickens were grown in each of three identical houses under kerosene, fluorescent, and LED lighting configurations. Under baseline conditions, a yearly expenditure of 1,200 USD is required to illuminate the three houses with kerosene. The LED system eliminates this fuel use and expense with a corresponding simple payback time of 1.5 years, while the solar-fluorescent system has a payback time of 9.3 years. The corresponding reduction in fuel expenditure in both cases represents a 15percent increase in after-tax net income (revenues minus expenses) across the entire business operation. The differential cost-effectiveness between the LED and fluorescent systems would be substantially greater if the fluorescent system were upsized to provide the same light as the LED system. Providing light with the fluorescent or LED systems is also far more economical than connecting to the grid in this case. The estimated grid-connection cost at this facility is 1.7 million Kenya Schillings (approximately 21,250 USD), which is nearly six-times the cost of the fluorescent system and 35-times the cost of the LED system.The LED system also confers various non-energy benefits. The relative uniformity of LED lighting, compared to the fluorescent or kerosene lighting, reduced crowding which in turn created a less stressful environment for the chickens. The far higher levels of illumination also created a better environment for the workers, while eliminating the time required for obtaining fuel and maintaining kerosene lanterns. An additional advantage of the LED system relative to the solar fluorescent system was that the former does not require a skilled technician to carry out the installation. The portable LED system lighting layout is also more easily adjusted than that of the hardwired fluorescent systems. Furthermore, switching to the LED system avoids over one metric ton of carbon dioxide emissions per house on an annual basis compared to kerosene. There is high potential for replication of this particular LED lighting strategy in the developing world. In order to estimate the scale of kerosene use and the potential for savings, more information is needed on the numbers of chickens produced off-grid, as well as lighting uses for other categories of poultry production (egg layers, indigenous broilers ). Our discovery that weight gain did not slow in the solar-fluorescent house after it experienced extended lighting outages beginning on day 14 of the 35-day study suggests that conventional farming practices in Kenyan broiler operations may call for more hours of lighting than is needed to achieve least-cost production.

Tracy, Jennifer; Mills, Evan

2010-11-06T23:59:59.000Z

493

Estimate of Ocean Mixed Layer Deepening after a Typhoon Passage over the South China Sea by Using Satellite Data  

Science Conference Proceedings (OSTI)

The ocean responses to Typhoon Cimaron, which influenced the South China Sea (SCS) from 1 to 8 November 2006, are analyzed. Based on satellite-observed sea surface temperature (SST) and climatological temperature profiles in the SCS, mixed layer ...

Jiayi Pan; Yujuan Sun

2013-03-01T23:59:59.000Z

494

An Innovative Injection and Mixing System for Diesel Fuel Reforming  

DOE Green Energy (OSTI)

This project focused on fuel stream preparation improvements prior to injection into a solid oxide fuel cell reformer. Each milestone and the results from each milestone are discussed in detail in this report. The first two milestones were the creation of a coking formation test rig and various testing performed on this rig. Initial tests indicated that three anti-carbon coatings showed improvement over an uncoated (bare metal) baseline. However, in follow-up 70 hour tests of the down selected coatings, Scanning Electron Microscope (SEM) analysis revealed that no carbon was generated on the test specimens. These follow-up tests were intended to enable a down selection to a single best anti-carbon coating. Without the formation of carbon it was impossible to draw conclusions as to which anti-carbon coating showed the best performance. The final 70 hour tests did show that AMCX AMC26 demonstrated the lowest discoloration of the metal out of the three down selected anti-carbon coatings. This discoloration did not relate to carbon but could be a useful result when carbon growth rate is not the only concern. Unplanned variations in the series of tests must be considered and may have altered the results. Reliable conclusions could only be drawn from consistent, repeatable testing beyond the allotted time and funding for this project. Milestones 3 and 4 focused on the creation of a preheating pressure atomizer and mixing chamber. A design of experiment test helped identify a configuration of the preheating injector, Build 1, which showed a very uniform fuel spray flow field. This injector was improved upon by the creation of a Build 2 injector. Build 2 of the preheating injector demonstrated promising SMD results with only 22psi fuel pressure and 0.7 in H2O of Air. It was apparent from testing and CFD that this Build 2 has flow field recirculation zones. These recirculation zones may suggest that this Build 2 atomizer and mixer would require steam injection to reduce the auto ignition potential. It is also important to note that to achieve uniform mixing within a short distance, some recirculation is necessary. Milestone 5 generated CFD and FEA results that could be used to optimize the preheating injector. CFD results confirmed the recirculation zones seen in test data and confirmed that the flow field would not change when attached to a reformer. The FEA predicted fuel wetted wall temperatures which led to several suggested improvements that could possibly improve nozzle efficiency. Milestone 6 (originally an optional task) took a different approach than the preheating pressure atomizer. It focused on creation and optimization of a piezoelectric injector which could perform at extremely low fuel pressures. The piezoelectric atomizer showed acceptable SMD results with fuel pressure less than 1.0 psig and air pressure less than 1.0 in H2O. These SMD values were enhanced whe