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Note: This page contains sample records for the topic "visible piping visible" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
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1

Visibly photoluminescent silica aerogels  

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

Visibly photoluminescent silica aerogels Title Visibly photoluminescent silica aerogels Publication Type Journal Article Year of Publication 1997 Authors Ayers, Michael R., and...

2

Robust epsilon visibility  

Science Conference Proceedings (OSTI)

Analytic visibility algorithms, for example methods which compute a subdivided mesh to represent shadows, are notoriously unrobust and hard to use in practice. We present a new method based on a generalized definition of extremal stabbing lines, which ... Keywords: 3D visibility, epsilon visibility, illumination, robust visibility predicates, shadow algorithms

Florent Duguet; George Drettakis

2002-07-01T23:59:59.000Z

3

The Visible Cement Dataset Homepage  

Science Conference Proceedings (OSTI)

NIST. The Visible Cement Dataset is a collection of three-dimensional data sets of hydrating cement, Plaster of Paris, and ...

2013-09-25T23:59:59.000Z

4

Visible Light Photoreduction of CO  

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

Group techtransfer@netl.doe.gov May 2013 Opportunity Research is currently active on the patent-pending technology "Visible Light Photoreduction of CO 2 Using Heterostructured...

5

Automated Measurements of Atmospheric Visibility  

Science Conference Proceedings (OSTI)

The concept of using a solid-state, linear-array imaging device coupled with computerized scene analysis and display to measure daytime atmospheric visibility is described. Computer software is implemented for routine conversion of observed ...

W. Viezee; W. E. Evans

1983-08-01T23:59:59.000Z

6

Springtime Visibility in the Arctic  

Science Conference Proceedings (OSTI)

Since the Ptarmigan flights in the 1950s, the springtime visibility reduction in the Arctic has been identified with pollution aerosol. However, observed values of the dry aerosol extinction coefficient are too small to explain the observed ...

F. G. Meyer; J. A. Curry; C. A. Brock; L. F. Radke

1991-03-01T23:59:59.000Z

7

Visibility Trends for Coastal Regions  

DOE Green Energy (OSTI)

Increased biomass burning (e.g., forest fires, controlled burns, etc.) and anthropogenic emissions into the earth's atmosphere in the past century have led to much debate with regard to greenhouse gases, atmospheric carbon buildup, aerosol increases, and global warming. Atmospheric aerosols are linked to reduced air quality and visibility (V) in many parts of the world. In south-central South Carolina visibility reduction has been responsible for traffic fatalities on public highways, with resulting lawsuits against governmental entities. Congress passed the Clean Air Act in 1963, with amendments in 1970, 1977, and 1990 to improve air quality. The actual implementation of the Clean Air Act has been an intermittent process because of litigation over some provisions of the Act. However, it is reasonable to assume that visibility has improved in the U.S. over the past decades due to implementation of the Clean Air Act's provisions. In this study visibility data have been acquired for seven weather stations along or near the U.S. East Coast to study how conditions have changed from the 1980s to the 1990s.

Weber, A.H.

2003-11-24T23:59:59.000Z

8

Gamma-Ray Pulsar Visibility  

E-Print Network (OSTI)

PSR J0437-4715 is a millisecond pulsar (MSP) thought to be ``pair formation starved'' (having limited pair cascades due to magnetic photon absorption). Fortunately the general relativistic (GR) electrodynamical model under consideration applicable to this pulsar have few free parameters. We model PSR J0437-4715's visibility, using a 3D model which incorporates the variation of the GR E-field over the polar cap (PC), taking different observer and inclination angles into account. Using this pulsar as a case study, one may generalize to conducting a pulsar population visibility study. We lastly comment on the role of the proposed South African SKA (Square Kilometre Array) prototype, KAT (Karoo Array Telescope), for GLAST gamma-ray pulsar identification.

Venter, C

2005-01-01T23:59:59.000Z

9

Gamma-Ray Pulsar Visibility  

E-Print Network (OSTI)

PSR J0437-4715 is a millisecond pulsar (MSP) thought to be ``pair formation starved'' (having limited pair cascades due to magnetic photon absorption). Fortunately the general relativistic (GR) electrodynamical model under consideration applicable to this pulsar have few free parameters. We model PSR J0437-4715's visibility, using a 3D model which incorporates the variation of the GR E-field over the polar cap (PC), taking different observer and inclination angles into account. Using this pulsar as a case study, one may generalize to conducting a pulsar population visibility study. We lastly comment on the role of the proposed South African SKA (Square Kilometre Array) prototype, KAT (Karoo Array Telescope), for GLAST gamma-ray pulsar identification.

C. Venter; O. C. de Jager; A. Tiplady

2005-10-14T23:59:59.000Z

10

Gamma-Ray Pulsar Visibility  

E-Print Network (OSTI)

Abstract. PSR J0437-4715 is a millisecond pulsar (MSP) thought to be “pair formation starved” (having limited pair cascades due to magnetic photon absorption). Fortunately the general relativistic (GR) electrodynamical model under consideration applicable to this pulsar have few free parameters. We model PSR J0437-4715’s visibility [1], using a 3D model which incorporates the variation of the GR E-field over the polar cap (PC), taking different observer and inclination angles into account. Using this pulsar as a case study, one may generalize to conducting a pulsar population visibility study. We lastly comment on the role of the proposed South African SKA (Square Kilometre Array) prototype, KAT (Karoo Array Telescope), for GLAST ?-ray pulsar identification.

Christo Venter; Ocker C. De Jager; Adrian Tiplady

2005-01-01T23:59:59.000Z

11

Smoke and Visible Emissions (New Mexico)  

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

This rule establishes controls on smoke and visible emissions from certain sources.  This rule is not intended to preempt any more stringent controls on smoke and visible emissions provided in any...

12

A grammatical representation of visibly pushdown languages  

Science Conference Proceedings (OSTI)

Model-checking regular properties is well established and a powerful verification technique for regular as well as context-free program behaviours. Recently, through the use of ?-visibly pushdown languages (?VPLs), defined by ?-visibly ...

Joachim Baran; Howard Barringer

2007-07-01T23:59:59.000Z

13

Improved visibility computation on massive grid terrains  

Science Conference Proceedings (OSTI)

This paper describes the design and engineering of algorithms for computing visibility maps on massive grid terrains. Given a terrain T, specified by the elevations of points in a regular grid, and given a viewpoint v, the visibility ...

Jeremy Fishman; Herman Haverkort; Laura Toma

2009-11-01T23:59:59.000Z

14

Vicarious Calibration of the Meteosat Visible Channel  

Science Conference Proceedings (OSTI)

Postlaunch calibration of the Meteosat visible (VIS) channel has been performed with Meteosat-1, Meteosat-2, and Meteosat-4. The radiance at the satellite radiometer aperture has been determined by independent means and has been related to the ...

Karl-Theodor Kriebel; Volker Amann

1993-04-01T23:59:59.000Z

15

The Estimation of Snowfall Rate Using Visibility  

Science Conference Proceedings (OSTI)

The relationship between liquid equivalent snowfall rate and visibility is investigated using data collected at the National Center for Atmospheric Research Marshall Snowfall Test Site during two winter field seasons and using theoretical ...

Roy M. Rasmussen; Jothiram Vivekanandan; Jeffrey Cole; Barry Myers; Charles Masters

1999-10-01T23:59:59.000Z

16

Hierarchical geometric models for visible surface algorithms  

Science Conference Proceedings (OSTI)

The geometric structure inherent in the definition of the shapes of three-dimensional objects and environments is used not just to define their relative motion and placement, but also to assist in solving many other problems of systems for producing ... Keywords: geometric models, hidden surface algorithms, hierarchical data structures, visible surface algorithms

James H. Clark

1976-10-01T23:59:59.000Z

17

Probabilistic Parameterizations of Visibility Using Observations of Rain Precipitation Rate, Relative Humidity, and Visibility  

Science Conference Proceedings (OSTI)

This study analyzes the occurrence of the visibility (Vis) versus precipitation rates (PR) for rain and versus relative humidity (RH) from surface observations that were collected during the Fog Remote Sensing and Modeling (FRAM) field project, ...

I. Gultepe; J. A. Milbrandt

2010-01-01T23:59:59.000Z

18

Visibility analysis on the web using co-visibilities and semantic networks  

Science Conference Proceedings (OSTI)

Monitoring public attention for a topic is of interest for many target groups like social scientists or public relations. Several examples demonstrate how public attention caused by real-world events is accompanied by an accordant visibility of topics ...

Peter Kiefer; Klaus Stein; Christoph Schlieder

2005-10-01T23:59:59.000Z

19

Visible-wavelength semiconductor lasers and arrays  

DOE Patents (OSTI)

A visible semiconductor laser. The visible semiconductor laser includes an InAlGaP active region surrounded by one or more AlGaAs layers on each side, with carbon as the sole p-type dopant. Embodiments of the invention are provided as vertical-cavity surface-emitting lasers (VCSELs) and as edge-emitting lasers (EELs). One or more transition layers comprised of a substantially indium-free semiconductor alloy such as AlAsP, AlGaAsP, or the like may be provided between the InAlGaP active region and the AlGaAS DBR mirrors or confinement layers to improve carrier injection and device efficiency by reducing any band offsets. Visible VCSEL devices fabricated according to the invention with a one-wavelength-thick (1.lambda.) optical cavity operate continuous-wave (cw) with lasing output powers up to 8 mW, and a peak power conversion efficiency of up to 11%.

Schneider, Jr., Richard P. (Albuquerque, NM); Crawford, Mary H. (Albuquerque, NM)

1996-01-01T23:59:59.000Z

20

Lidar-Transmissometer Visibility Comparisons Over Slant and Horizontal Paths  

Science Conference Proceedings (OSTI)

Atmospheric visibility has been measured with the lidar technique using the “slope method.” The system is briefly described and some aspects of slant path visibility measurements for aeronautical applications are discussed. Measurements in dense ...

J. L. Gaumet; A. Petitpa

1982-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "visible piping visible" 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

Meteosat and GOES-East Imager Visible Channel Calibration  

Science Conference Proceedings (OSTI)

As a preliminary step to solar irradiance calculations, the Centre de Météorologie Spatiale (CMS) has developed a pragmatic approach to calibrate the visible channels of Meteosat and GOES-East imagers. The responsivity of the Meteosat visible ...

Pierre Le Borgne; Gérard Legendre; Anne Marsouin

2004-11-01T23:59:59.000Z

22

Seeing solar on campus : a visible photovoltaic installation on campus  

E-Print Network (OSTI)

This paper presents a methodology for selecting a site on the MIT campus for a visible solar photovoltaic installation. Visibility, solar exposure, advertising potential, aesthetics, interactivity and direct or important ...

Guarda, Daniel Jair Alves

2006-01-01T23:59:59.000Z

23

Visible-wavelength semiconductor lasers and arrays  

DOE Patents (OSTI)

The visible semiconductor laser includes an InAlGaP active region surrounded by one or more AlGaAs layers on each side, with carbon as the sole p-type dopant. Embodiments of the invention are provided as vertical-cavity surface-emitting lasers (VCSELs) and as edge-emitting lasers (EELs). One or more transition layers comprised of a substantially indium-free semiconductor alloy such as AlAsP, AlGaAsP, or the like may be provided between the InAlGaP active region and the AlGaAS DBR mirrors or confinement layers to improve carrier injection and device efficiency by reducing any band offsets. Visible VCSEL devices fabricated according to the invention with a one-wavelength-thick (1{lambda}) optical cavity operate continuous-wave (cw) with lasing output powers up to 8 mW, and a peak power conversion efficiency of up to 11%. 5 figs.

Schneider, R.P. Jr.; Crawford, M.H.

1996-09-17T23:59:59.000Z

24

Visibility graph analysis of solar wind velocity  

E-Print Network (OSTI)

We analyze in situ measurements of solar wind velocity obtained by Advanced Composition Explorer (ACE) spacecraft and Helios spacecraft during the years 1998-2012 and 1975-1983 respectively. The data belong to mainly solar cycle 23 (1996-2008) and solar cycle 21 (1976-1986) respectively. We use Directed Horizontal Visibility graph (DHVg) algorithm and estimate a graph functional, namely, the degree distance (D) as the Kullback-Leibler divergence (KLD) argument to understand time irreversibility of solar wind time series. We estimate this degree distance irreversibility parameter for these time series at different phases of solar activity cycle. Irreversibility parameter is first established for known dynamical data and then applied for solar wind velocity time series. It is observed that irreversibility in solar wind velocity fluctuations show similar behaviour at 0.3 AU (Helios data) and 1 AU (ACE data). Moreover it changes over the different phases of solar activity cycle.

Suyal, Vinita; Singh, Harinder P

2013-01-01T23:59:59.000Z

25

Visible light surface emitting semiconductor laser  

DOE Patents (OSTI)

A vertical-cavity surface-emitting laser is disclosed comprising a laser cavity sandwiched between two distributed Bragg reflectors. The laser cavity comprises a pair of spacer layers surrounding one or more active, optically emitting quantum-well layers having a bandgap in the visible which serve as the active optically emitting material of the device. The thickness of the laser cavity is m .lambda./2n.sub.eff where m is an integer, .lambda. is the free-space wavelength of the laser radiation and n.sub.eff is the effective index of refraction of the cavity. Electrical pumping of the laser is achieved by heavily doping the bottom mirror and substrate to one conductivity-type and heavily doping regions of the upper mirror with the opposite conductivity type to form a diode structure and applying a suitable voltage to the diode structure. Specific embodiments of the invention for generating red, green, and blue radiation are described.

Olbright, Gregory R. (Boulder, CO); Jewell, Jack L. (Bridgewater, NJ)

1993-01-01T23:59:59.000Z

26

Making infrastructure visible: a case study of home networking .  

E-Print Network (OSTI)

??In this dissertation, I examine how making infrastructure visible affects users' engagement with that infrastructure, through the case study of home networking. I present empirical… (more)

Chetty, Marshini

2011-01-01T23:59:59.000Z

27

Visible/infrared radiometric calibration station  

Science Conference Proceedings (OSTI)

We have begun construction of a visible/infrared radiometric calibration station that will allow for absolute calibration of optical and IR remote sensing instruments with clear apertures less than 16 inches in diameter in a vacuum environment. The calibration station broadband sources will be calibrated at the National Institute of Standards and Technology (NIST) and allow for traceable absolute radiometric calibration to within {plus_minus}3% in the visible and near IR (0.4--2.5 {mu}m), and less than {plus_minus}1% in the infrared, up to 12 {mu}m. Capabilities for placing diffraction limited images or for sensor full-field flooding will exist. The facility will also include the calibration of polarization and spectral effects, spatial resolution, field of view performance, and wavefront characterization. The configuration of the vacuum calibration station consists of an off-axis 21 inch, f/3.2, parabolic collimator with a scanning fold flat in collimated space. The sources are placed, via mechanisms to be described, at the focal plane of the off-axis parabola. Vacuum system pressure will be in the 10{sup {minus}6} Torr range. The broadband white-light source is a custom design by LANL with guidance from Labsphere Inc. The continuous operating radiance of the integrating sphere will be from 0.0--0.006 W/cm{sup 2}/Sr/{mu}m (upper level quoted for {approximately}500 nm wavelength). The blackbody source is also custom designed at LANL with guidance from NIST. The blackbody temperature will be controllable between 250--350{degrees}K. Both of the above sources have 4.1 inch apertures with estimated radiometric instability at less than 1%. The designs of each of these units will be described. The monochromator and interferometer light sources are outside the vacuum, but all optical relay and beam shaping optics are enclosed within the vacuum calibration station. These sources are described, as well as the methodology for alignment and characterization.

Byrd, D.A.; Maier, W.B. II; Bender, S.C.; Holland, R.F.; Michaud, F.D.; Luettgen, A.L.; Christensen, R.W. [Los Alamos National Lab., NM (United States); O`Brian, T.R. [National Inst. of Standards and Technology (NML), Gaithersburg, MD (United States). Radiometric Physics Div.

1994-07-01T23:59:59.000Z

28

A visibility control system for collaborative digital table  

Science Conference Proceedings (OSTI)

We propose a novel display system that presents information with different levels of visibility to multiple users for enhancing collaborative multi-touch on digital tables by controlling visibility with a revolving polarizer. We first describe the system ... Keywords: CSCW, Display system, Entertainment, Public display

Satoshi Sakurai; Yoshifumi Kitamura; Sriram Subramanian; Fumio Kishino

2009-11-01T23:59:59.000Z

29

Geothermal Exploration with Visible through Long Wave Infrared Imaging  

Open Energy Info (EERE)

with Visible through Long Wave Infrared Imaging with Visible through Long Wave Infrared Imaging Spectrometers Jump to: navigation, search OpenEI Reference LibraryAdd to library Conference Paper: Geothermal Exploration with Visible through Long Wave Infrared Imaging Spectrometers Abstract Surface minerals of active geothermal systems have been mapped using visible-short wave infrared and mid wave and long wave imaging spectrometers separately. May and June 2008, the Prospectir sensor and SEBASS (Spatially Enhanced Broadband Array Spectrograph System) were located on together on a roll compensated mount viewing through the same camera port in a Twin Otter. These two imaging spectrometers have similar Instantaneous Fields of View (IFOV) and together collect over 600 channels of spectral information from the visible to the long wave infrared.

30

Mesoscale Cloud State Estimation from Visible and Infrared Satellite Radiances  

Science Conference Proceedings (OSTI)

This study focuses on cloudy atmosphere state estimation from high-resolution visible and infrared satellite remote sensing measurements and a mesoscale model with explicit cloud prediction. The cloud state is defined as 3D spatially distributed ...

T. Vukicevic; T. Greenwald; M. Zupanski; D. Zupanski; T. Vonder Haar; A. S. Jones

2004-12-01T23:59:59.000Z

31

The NPOESS VIIRS Day/Night Visible Sensor  

Science Conference Proceedings (OSTI)

The National Polar-orbiting Operational Environmental Satellite System (NPOESS) will feature the Visible–Infrared Imager–Radiometer Suite (VIIRS), a 22-channel imager that will contribute to nearly half of the NPOESS environmental data records. ...

Thomas E. Lee; Steven D. Miller; F. Joseph Turk; Carl Schueler; Richard Julian; Steve Deyo; Patrick Dills; Sherwood Wang

2006-02-01T23:59:59.000Z

32

A Parameterization of Broadband Conversion Factors for METEOSAT Visible Radiances  

Science Conference Proceedings (OSTI)

The conversion of radiances measured by the METEOSAT visible channel into broadband radiances can be performed as long as the appropriate conversion factors are known. A simple model allowing a spectral description of the optical properties of ...

J. Stum; B. Pinty; D. Ramond

1985-12-01T23:59:59.000Z

33

Rain Estimation from Infrared and Visible GOES Satellite Data  

Science Conference Proceedings (OSTI)

An automated statistical pattern recognition technique is presented that uses visible and IR satellite imagery to estimate instantaneous surface rainfall rates. The technique uses both brightness and textural statistics to estimate rainfall in 10 ...

Finbarr O'Sullivan; Carlyle H. Wash; Michael Stewart; Craig E. Motell

1990-03-01T23:59:59.000Z

34

Posters Mean Fluxes of Visible Solar Radiation in Broken Clouds  

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

7 Posters Mean Fluxes of Visible Solar Radiation in Broken Clouds V. E. Zuev, G. A. Titov, T. B. Zhuravleva, and S. Y. Popov Institute of Atmospheric Optics, Siberian Branch...

35

An Expert System Approach for Prediction of Maritime Visibility Obscuration  

Science Conference Proceedings (OSTI)

An Expert system for Shipboard Obscuration Prediction (AESOP), an artificial intelligence approach to forecasting maritime visibility obscurations, has been designed, developed, and tested. The problem-solving model for AESOP, running within an ...

James E. Peak; Paul M. Tag

1989-12-01T23:59:59.000Z

36

Automated Lightning Flash Detection in Nighttime Visible Satellite Data  

Science Conference Proceedings (OSTI)

The Defense Meteorological Satellite Program (DMSP) Operational Linescan System (OLS) nighttime visible channel was designed to detect earth–atmosphere features under conditions of low illumination (e.g., near the solar terminator or via moonlight ...

Richard L. Bankert; Jeremy E. Solbrig; Thomas F. Lee; Steven D. Miller

2011-06-01T23:59:59.000Z

37

Scientists Build First 'Frequency Comb' To Display Visible ' ...  

Science Conference Proceedings (OSTI)

... Each visible line or "tooth" is an individual frequency in ... such photos would need to be lined up to ... super-short pulses of high-power light containing ...

2010-12-28T23:59:59.000Z

38

VRCodes : embedding unobtrusive data for new devices in visible light  

E-Print Network (OSTI)

This thesis envisions a public space populated with active visible surfaces which appear different to a camera than to the human eye. Thus, they can act as general digital interfaces that transmit machine-compatible data ...

Woo, Grace R

2012-01-01T23:59:59.000Z

39

The Use of Visible Data in VAS Temperature Soundings  

Science Conference Proceedings (OSTI)

A method is developed that makes use of visible reflectance data to provide cloud information from the retrieval of atmospheric vertical soundings from VAS geostationary radiance observations. The technique enables estimates of fractional cloud ...

Gin-Rong Liu; William L. Smith; Thomas H. Achtor

1988-12-01T23:59:59.000Z

40

A Study of Visibility in Eighteen Cities in the Western and Southwestern United States  

Science Conference Proceedings (OSTI)

Airport visibility data for the period 1958–78 or 1979, depending on the availability of data, for 18 cities in the western and southwestern United States are examined. A threshold visibility below which visibility is deemed “poor” is determined ...

P. Stuart Naegele; William D. Sellers

1981-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "visible piping visible" 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

ARM - Evaluation Product - Airborne Visible/Infrared Imaging Spectrometer  

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

ProductsAirborne Visible/Infrared Imaging ProductsAirborne Visible/Infrared Imaging Spectrometer (AVIRIS) Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Evaluation Product : Airborne Visible/Infrared Imaging Spectrometer (AVIRIS) 1997.08.01 - 1997.08.01 Site(s) SGP General Description AVIRIS is an optical sensor that delivers calibrated images of the upwelling spectral radiance in 224 contiguous spectral channels (bands) with wavelengths from 400 to 2500 nanometers. AVIRIS has been flown on two aircraft platforms: a NASA ER-2 jet and the Twin Otter turboprop. The main objective of the AVIRIS project is to identify, measure, and monitor constituents of the Earth's surface and atmosphere based on molecular absorption and particle scattering signatures. Research with

42

Lighting Retrofit Improving Visibility, Saving Energy | Department of  

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

Lighting Retrofit Improving Visibility, Saving Energy Lighting Retrofit Improving Visibility, Saving Energy Lighting Retrofit Improving Visibility, Saving Energy August 27, 2010 - 10:05am Addthis New LED lighting fixtures (right) emit a whiter light than existing high-pressure sodium cobra head streetlights (left) and don't spill light onto nearby houses. | Photos courtesy of the City of Muscatine New LED lighting fixtures (right) emit a whiter light than existing high-pressure sodium cobra head streetlights (left) and don't spill light onto nearby houses. | Photos courtesy of the City of Muscatine Kevin Craft In the small Midwestern town of Muscatine, Iowa-known as the "The Pearl Button Capital of the World" for the millions of pearl buttons produced there in the early 1900s-a lighting retrofit project will bring a new

43

Energy Department Announces Funding to Provide Better Visibility into the  

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

Funding to Provide Better Visibility Funding to Provide Better Visibility into the Health of the Nation's Electric Grid Energy Department Announces Funding to Provide Better Visibility into the Health of the Nation's Electric Grid September 26, 2013 - 12:06pm Addthis NEWS MEDIA CONTACT (202) 586-4940 Editor's note: This post has been edited to correct the deadline for application submissions. WASHINGTON - As part of the Administration's commitment to improve the reliability and resiliency of the Nation's electric grid, the Energy Department today announced up to $9 million in funding to facilitate rapid response to abnormal grid conditions. As a result, utilities will be able to better detect and head off potential blackouts, while improving day-to-day grid reliability and helping with the integration of clean

44

Dark/visible parallel universes and Big Bang nucleosynthesis  

Science Conference Proceedings (OSTI)

We develop a model for visible matter-dark matter interaction based on the exchange of a massive gray boson called herein the Mulato. Our model hinges on the assumption that all known particles in the visible matter have their counterparts in the dark matter. We postulate six families of particles five of which are dark. This leads to the unavoidable postulation of six parallel worlds, the visible one and five invisible worlds. A close study of big bang nucleosynthesis (BBN), baryon asymmetries, cosmic microwave background (CMB) bounds, galaxy dynamics, together with the Standard Model assumptions, help us to set a limit on the mass and width of the new gauge boson. Modification of the statistics underlying the kinetic energy distribution of particles during the BBN is also discussed. The changes in reaction rates during the BBN due to a departure from the Debye-Hueckel electron screening model is also investigated.

Bertulani, C. A.; Frederico, T.; Fuqua, J.; Hussein, M. S.; Oliveira, O.; Paula, W. de [Department of Physics and Astronomy, Texas A and M University-Commerce, Commerce TX 75429 (United States); Departamento de Fisica, Instituto Tecnologico de Aeronautica, DCTA 12.228-900, Sao Jose dos Campos, SP (Brazil); Department of Physics and Astronomy, Texas A and M University-Commerce, Commerce TX 75429 (United States); Instituto de Fisica, Universidade de Sao Paulo, Caixa Postal 66318, 05314-970 Sao Paulo, SP (Brazil); Departamento de Fisica, Instituto Tecnologico de Aeronautica, DCTA 12.228-900, Sao Jose dos Campos, SP, Brazil and Departamento de Fisica, Universidade de Coimbra, 3004-516 Coimbra (Portugal); Departamento de Fisica, Instituto Tecnologico de Aeronautica, DCTA 12.228-900, Sao Jose dos Campos, SP (Brazil)

2012-11-20T23:59:59.000Z

45

Recovery of underwater visibility and structure by polarization analysis  

E-Print Network (OSTI)

Abstract—Underwater imaging is important for scientific research and technology as well as for popular activities, yet it is plagued by poor visibility conditions. In this paper, we present a computer vision approach that removes degradation effects in underwater vision. We analyze the physical effects of visibility degradation. It is shown that the main degradation effects can be associated with partial polarization of light. Then, an algorithm is presented, which inverts the image formation process for recovering good visibility in images of scenes. The algorithm is based on a couple of images taken through a polarizer at different orientations. As a by-product, a distance map of the scene is also derived. In addition, this paper analyzes the noise sensitivity of the recovery. We successfully demonstrated our approach in experiments conducted in the sea. Great improvements of scene contrast and color correction were obtained, nearly doubling the

Yoav Y. Schechner; Nir Karpel

2005-01-01T23:59:59.000Z

46

Platform effects on optical variability and prediction of underwater visibility  

E-Print Network (OSTI)

Platform effects on optical variability and prediction of underwater visibility Grace Chang,1, specifically the breakdown of stratification from mixing by the hull of R/P FLIP. Modeled underwater radiance Successful, rapid identification of underwater tar- gets and accurate underwater imaging are critical

You, Yu

47

Supply chain product visibility: Methods, systems and impacts  

Science Conference Proceedings (OSTI)

Supply chain product visibility may be defined to mean the capacity of the supply chain to have a view of a product's lifecycle, from its conception, manufacturing, distribution, delivery to the end customer, customer's experience of the product, and ... Keywords: Architecture design, RFID, Sensor networks, Tracking and tracing

Ahmed Musa, Angappa Gunasekaran, Yahaya Yusuf

2014-01-01T23:59:59.000Z

48

Improved Information Connectivity and Visibility throughout the Global Supply Base  

Science Conference Proceedings (OSTI)

Although the literature frequently examines achieving an integrated supply chain and participating in information sharing with supply chain partners, there is little guidance given to firms on how to progress to a state where these goals can become reality. ... Keywords: Global Supply Base, Information Sharing, Information Visibility, Supply Chain Integration, Supply Chain Management

Kevin Duffy; William Wilson

2010-10-01T23:59:59.000Z

49

Electrically injected visible vertical cavity surface emitting laser diodes  

DOE Patents (OSTI)

Visible laser light output from an electrically injected vertical cavity surface emitting laser (VSCEL) diode is enabled by the addition of phase-matching spacer layers on either side of the active region to form the optical cavity. The spacer layers comprise InAlP which act as charge carrier confinement means. Distributed Bragg reflector layers are formed on either side of the optical cavity to act as mirrors. 5 figs.

Schneider, R.P.; Lott, J.A.

1994-09-27T23:59:59.000Z

50

DESIGN OF VISIBLE DIAGNOSTIC BEAMLINE FOR NSLS2 STORAGE RING  

SciTech Connect

A visible synchrotron light monitor (SLM) beam line has been designed at the NSLS2 storage ring, using the bending magnet radiation. A retractable thin absorber will be placed in front of the first mirror to block the central x-rays. The first mirror will reflect the visible light through a vacuum window. The light is guided by three 6-inch diameter mirrors into the experiment hutch. In this paper, we will describe design work on various optical components in the beamline. The ultra high brightness NSLS-II storage ring is under construction at Brookhaven National Laboratory. It will have 3GeV, 500mA electron beam circulating in the 792m ring, with very low emittance (0.9nm.rad horizontal and 8pm.rad vertical). The ring is composed of 30 DBA cells with 15 fold symmetry. Three damping wigglers will be installed in long straight sections 8, 18 and 28 to lower the emittance. While electrons pass through the bending magnet, synchrotron radiation will be generated covering a wide spectrum. There are other insertion devices in the storage ring which will generate shorter wavelength radiation as well. Synchrotron radiation has been widely used as diagnostic tool to measure the transverse and longitudinal profile. Three synchrotron light beam lines dedicated for diagnostics are under design and construction for the NSLS-II storage ring: two x-ray beam lines (pinhole and CRL) with the source points from Cell 22 BM{_}A (first bending in the DBA cell) and Cell22 three-pole wiggler; the third beam line is using visible part of radiation from Cell 30 BM{_}B (second bending magnet from the cell). Our paper focuses on the design of the visible beam line - SLM.

Cheng, W.; Fernandes, H.; Hseuh, H.; Kosciuk, B.; Krinsky, S.; Singh, O.

2011-03-28T23:59:59.000Z

51

Visible and Infrared Optical Design for the ITER Upper Ports  

SciTech Connect

This document contains the results of an optical design scoping study of visible-light and infrared optics for the ITER upper ports, performed by LLNL under contract for the US ITER Project Office. ITER is an international collaboration to build a large fusion energy tokamak with a goal of demonstrating net fusion power for pulses much longer than the energy confinement time. At the time of this report, six of the ITER upper ports are planned to each to contain a camera system for recording visible and infrared light, as well as other diagnostics. the performance specifications for the temporal and spatial resolution of this system are shown in the Section II, Functional Specifications. They acknowledge a debt to Y. Corre and co-authors of the CEA Cadarache report ''ITER wide-angle viewing and thermographic and visible system''. Several of the concepts used in this design are derived from that CEA report. The infrared spatial resolution for optics of this design is diffraction-limited by the size of the entrance aperture, at lower resolution than listed in the ITER diagnostic specifications. The size of the entrance aperture is a trade-off between spatial resolution, optics size in the port, and the location of relay optics. The signal-to-noise ratio allows operation at the specified time resolutions.

Lasnier, C; Seppala, L; Morris, K; Groth, M; Fenstermacher, M; Allen, S; Synakowski, E; Ortiz, J

2007-03-01T23:59:59.000Z

52

Effects of Moisture Released during Forest Burning on Fog Formation and Implications for Visibility  

Science Conference Proceedings (OSTI)

Smoke from wildland burning in association with fog has been implicated as a visibility hazard over roadways in the United States. Visibilities at accident sites have been estimated in the range from 1 to 3 m (extinction coefficients between 1000 ...

Gary L. Achtemeier

2008-05-01T23:59:59.000Z

53

Polarimetric Remote Sensing in the Visible to Near Infrared James R. Shell II  

E-Print Network (OSTI)

Polarimetric Remote Sensing in the Visible to Near Infrared by James R. Shell II B.S. Physics Title of Dissertation: Polarimetric Remote Sensing in the Visible to Near Infrared I, James R. Shell II Remote Sensing in the Visible to Near Infrared by James R. Shell II Submitted to the Chester F. Carlson

Salvaggio, Carl

54

Visible light emitting vertical cavity surface emitting lasers  

DOE Patents (OSTI)

A vertical cavity surface emitting laser that emits visible radiation is built upon a substrate, then having mirrors, the first mirror on top of the substrate; both sets of mirrors being a distributed Bragg reflector of either dielectrics or other materials which affect the resistivity or of semiconductors, such that the structure within the mirror comprises a plurality of sets, each having a thickness of {lambda}/2n where n is the index of refraction of each of the sets; each of the mirrors adjacent to spacers which are on either side of an optically active bulk or quantum well layer; and the spacers and the optically active layer are from one of the following material systems: In{sub z}(Al{sub y}Ga{sub 1{minus}y}){sub 1{minus}z}P, InAlGaAs, AlGaAs, InGaAs, or AlGaP/GaP, wherein the optically active region having a length equal to m {lambda}/2n{sub eff} where m is an integer and n{sub eff} is the effective index of refraction of the laser cavity, and the spacer layer and one of the mirrors being transmissive to radiation having a wavelength of {lambda}/n, typically within the green to red portion of the visible spectrum. 10 figs.

Bryan, R.P.; Olbright, G.R.; Lott, J.A.; Schneider, R.P. Jr.

1995-06-27T23:59:59.000Z

55

Visible spectroscopy in the DIII-D divertor  

SciTech Connect

Spectroscopy measurements in the DIII-D divertor have been carried out with a survey spectrometer which provides simultaneous registration of the visible spectrum over the region 400--900 nm with a resolution of 0.2 nm. Broad spectral coverage is achieved through use of a fiberoptic transformer assembly to map the curved focal plane of a fast (f/3) Rowland-circle spectrograph into a rastered format on the rectangular sensor area of a two-dimensional CCD camera. Vertical grouping of pixels during CCD readout integrates the signal intensity over the height of each spectral segment in the rastered image, minimizing readout time. For the full visible spectrum, readout time is 50 ms. Faster response time (< 10 ms) may be obtained by selecting for readout just a small number of the twenty spectral segments in the image on the CCD. Simultaneous recording of low charge states of carbon, oxygen and injected impurities has yielded information about gas recycling and impurity behavior at the divertor strike points. Transport of lithium to the divertor region during lithium pellet injection has been studied, as well as cumulative deposition of lithium on the divertor targets from pellet injection over many successive discharges.

Brooks, N.H. [General Atomics, San Diego, CA (United States); Fehling, D.; Hillis, D.L.; Klepper, C.C. [Oak Ridge National Lab., TN (United States); Naumenko, N. [Inst. of Physics, Minsk (Belarus); Tugarinov, S. [TRINITI Lab., Troitsk (Russian Federation); Whyte, D.G. [INRS-Energie et Materiaux, Varennes, Quebec (Canada)

1996-06-01T23:59:59.000Z

56

Installation of a fast framing visible camera on KSTAR  

Science Conference Proceedings (OSTI)

Visible camera technologies have made remarkable progress in recent years, and the fast camera has proven itself to be a capable imaging diagnostic in studies of specific fusion plasma issues such as the start-up physics, plasma wall interactions, edge-localized modes, and disruptions. For the purpose of favorable visible imaging, a fast framing camera has recently been installed on the Korea Superconducting Tokamak Advanced Research (KSTAR) device. The camera uses a complementary metal-oxide semiconductor detector with a maximum resolution of 1280x1024 at 1000 frames/s (fps) and a minimum resolution of 1280x16 at 64 kfps. A 2-m-long viewport having a novel optical rail system was installed on a tangential port to view the tokamak interior. The system is fully controlled from the main control room and protected by a shutter from deposits. To verify that the camera electronics are safe from the high magnetic field and its rapid time variation, possible influences are considered theoretically and experimentally. In this work, we present the design and installation of the fast camera system on the KSTAR device with discussions on the field variation effect issues.

Chung, Jinil; Lee, Deok Kyo; Seo, Dongcheol [National Fusion Research Institute, Gwahangno 113, Daejeon 305-333 (Korea, Republic of); Choi, Myoung Choul [Korea Basic Science Institute, 804-1 Ochang, Cheongwon 363-883 (Korea, Republic of)

2008-10-15T23:59:59.000Z

57

Horizontal Visibility graphs generated by type-II intermittency  

E-Print Network (OSTI)

In this contribution we study the onset of chaos via type-II intermittency within the framework of Horizontal Visibility graph theory. We construct graphs associated to time series generated by an iterated map close to a Neimark-Sacker bifurcation and study, both numerically and analytically, their main topological properties. We find well defined equivalences between the main statistical properties of intermittent series (scaling of laminar trends and Lyapunov exponent) and those of the resulting graphs, and accordingly construct a graph theoretical description of type-II intermittency. We finally recast this theory into a graph-theoretical renormalization group framework, and show that the fixed point structure of RG flow diagram separates regular, critical and chaotic dynamics.

Ángel M. Núńez; José Patricio Gómez; Lucas Lacasa

2013-10-02T23:59:59.000Z

58

Navajo Generating Station and Air Visibility Regulations: Alternatives and Impacts  

Science Conference Proceedings (OSTI)

Pursuant to the Clean Air Act, the U.S. Environmental Protection Agency (EPA) announced in 2009 its intent to issue rules for controlling emissions from Navajo Generating Station that could affect visibility at the Grand Canyon and at several other national parks and wilderness areas. The final rule will conform to what EPA determines is the best available retrofit technology (BART) for the control of haze-causing air pollutants, especially nitrogen oxides. While EPA is ultimately responsible for setting Navajo Generating Station's BART standards in its final rule, it will be the U.S. Department of the Interior's responsibility to manage compliance and the related impacts. This study aims to assist both Interior and EPA by providing an objective assessment of issues relating to the power sector.

Hurlbut, D. J.; Haase, S.; Brinkman, G.; Funk, K.; Gelman, R.; Lantz, E.; Larney, C.; Peterson, D.; Worley, C.; Liebsch, E.

2012-01-01T23:59:59.000Z

59

CO2 SEQUESTRATION AND RECYCLE BY PHOTOCATALYSIS WITH VISIBLE LIGHT  

DOE Green Energy (OSTI)

Visible light-photocatalysis could provide a cost-effective route to recycle CO{sub 2} to useful chemicals or fuels. Development of an effective catalyst for the photocatalytic synthesis requires (i) the knowledge of the surface band gap and its relation to the surface structure, (ii) the reactivity of adsorbates and their reaction pathways, and (iii) the ability to manipulate the actives site for adsorption, surface reaction, and electron transfer. The objective of this research is to study the photo-catalytic activity of TiO{sub 2}-base catalyst. A series of TiO{sub 2}-supported metal catalysts were prepared for determining the activity and selectivity for the synthesis of methane and methanol. 0.5 wt% Cu/SrTiO{sub 3} was found to be the most active and selective catalyst for methanol synthesis. The activity of the catalyst decreased in the order: Ti silsesquioxane > Cu/SrTiO{sub 3} > Pt/TiO{sub 2} > Cu/TiO{sub 2} > TiO{sub 2} > Rh/TiO{sub 2}. To further increase the number of site for the reaction, we propose to prepare monolayer and multiplayer TiOx on high surface area mesoporous oxides. These catalysts will be used for in situ IR study in the Phase II research project to determine the reactivity of adsorbates. Identification of active adsorbates and sites will allow incorporation of acid/basic sites to alter the nature of CO{sub 2} and H{sub 2}O adsorbates and with Pt/Cu sites to direct reaction pathways of surface intermediates, enhancing the overall activity and selectivity for methanol and hydrocarbon synthesis. The overall goal of this research is to provide a greater predictive capability for the design of visible light-photosynthesis catalysts by a deeper understanding of the reaction kinetics and mechanism as well as by better control of the coordination/chemical environment of active sites.

Steven S.C. Chuang

2001-10-01T23:59:59.000Z

60

ARM: Shortwave Array Spectroradiometer-Hemispheric, VISible channel, low-sun angles [a0 data is uncalibrated  

DOE Data Explorer (OSTI)

Shortwave Array Spectroradiometer-Hemispheric, VISible channel, low-sun angles [a0 data is uncalibrated

Connor Flynn

Note: This page contains sample records for the topic "visible piping visible" 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

ARM: Shortwave Array Spectroradiometer-Hemispheric, VISible channel, high-sun angles [a0 data is uncalibrated  

DOE Data Explorer (OSTI)

Shortwave Array Spectroradiometer-Hemispheric, VISible channel, high-sun angles [a0 data is uncalibrated

Connor Flynn

62

ARM: Shortwave Array Spectroradiometer-Hemispheric, VISible channel, low-sun angles [a0 data is uncalibrated  

SciTech Connect

Shortwave Array Spectroradiometer-Hemispheric, VISible channel, low-sun angles [a0 data is uncalibrated

Connor Flynn

2011-03-22T23:59:59.000Z

63

ARM: Shortwave Array Spectroradiometer-Hemispheric, VISible channel, high-sun angles [a0 data is uncalibrated  

SciTech Connect

Shortwave Array Spectroradiometer-Hemispheric, VISible channel, high-sun angles [a0 data is uncalibrated

Connor Flynn

2011-03-22T23:59:59.000Z

64

The Health and Visibility Cost of Air Pollution: A Comparison of Estimation Methods  

E-Print Network (OSTI)

whether the visibility cost estimates from CVM and HPA aredetermine the overall cost estimates. 6 And the considerableuncertainty in the total cost estimate, as manifested by the

Delucchi, Mark; Murphy, James; McCubbin, Donald

2002-01-01T23:59:59.000Z

65

Reading the (In)visible Race: African-American Subject Representation and Formation in American Literature  

E-Print Network (OSTI)

exudes visibility. Dr. Flint “springs upon” Jacobs/Brentinvisible. Her “answer” to Dr. Flint does not even appear inand even intangible (Dr. Flint cannot strike her). In this

Hollingsworth, Lauren Colleen

2010-01-01T23:59:59.000Z

66

CO2 SEQUESTRATION AND RECYCLE BY PHOTOCATALYSIS WITH VISIBLE LIGHT  

DOE Green Energy (OSTI)

Photocatalysis could provide a cost-effective route to recycle CO{sub 2} to useful chemicals or fuels. Development of an effective catalyst for the photocatalytic synthesis requires (i) the knowledge of the surface band gap and its relation to the surface structure, (ii) the reactivity of adsorbates and their reaction pathways, and (iii) the ability to manipulate the actives site for adsorption, surface reaction, and electron transfer. The research tasks accomplished during first six months include setting up a photo-catalytic reactor, optical bench, calibration of gas chromatograph, catalyst preparation, and catalyst screening study. Addition of Pt and Cu on TiO{sub 2} was found to increase the activity of TiO{sub 2} catalysts for the synthesis of methanol and methane. The most active catalysts obtained from this study will be used for mechanistic study. The overall goal of this research is to provide a greater predictive capability for the design of visible light-photosynthesis catalysts by a deeper understanding of the reaction kinetics and mechanism as well as by better control of the coordination/chemical environment of active sites.

Steven S.C. Chuang

1999-12-31T23:59:59.000Z

67

HIGH-PERFORMANCE ALXGA1-XN-BASED UV PHOTODETECTORS FOR VISIBLE/SOLAR-BLIND  

E-Print Network (OSTI)

HIGH-PERFORMANCE ALXGA1-XN-BASED UV PHOTODETECTORS FOR VISIBLE/SOLAR-BLIND APPLICATIONS-PERFORMANCE ALXGA1-XN-BASED UV PHOTODETECTORS FOR VISIBLE/SOLAR-BLIND APPLICATIONS Necmi Biyikli Ph. D, environmental (ozone layer) monitoring, detection of biological/chemical agents, missile early warning systems

GĂĽrel, Levent

68

Intercomparison of Spectroradiometers for Global and Direct Solar Irradiance in the Visible Range  

Science Conference Proceedings (OSTI)

This paper presents the results of the analysis of the spectral, global, and direct solar irradiance measurements in the visible range (400–700 nm) that were made in the framework of the first Iberian UV–visible (VIS) instruments intercomparison. ...

José A. Martínez-Lozano; Maria P. Utrillas; Roberto Pedrós; Fernando Tena; Juan P. Díaz; Francisco J. Expósito; Jerónimo Lorente; Xavier de Cabo; Victoria Cachorro; Ricardo Vergaz; Virgilio Carreńo

2003-07-01T23:59:59.000Z

69

Assessing the potential visibility benefits of Clean Air Act Title IV emission reductions  

SciTech Connect

Assessments are made of the benefits of the 1990 Clean Air Act Title IV (COVE), Phase 2, SO2 and NOX reduction provisions, to the visibility in typical eastern and western Class 1 areas. Probable bands of visibility impairment distribution curves are developed for Shenandoah National Park, Smoky Mountain National Park and the Grand Canyon National Park, based on the existing emissions, ``Base Case``, and for the COVE emission reductions, ``CAAA Case``. Emission projections for 2010 are developed with improved versions of the National Acid Precipitation Assessment Program emission projection models. Source-receptor transfer matrices created with the Advanced Statistical Trajectory Regional Air Pollution (ASTRAP) model are used with existing emission inventories and with the emission projections to calculate atmospheric concentrations of sulfate and nitrate at the receptors of interest for existing and projected emission scenarios. The Visibility Assessment Scoping Model (VASM) is then used to develop distributions of visibility impairment. VASM combines statistics of observed concentrations of particulate species and relative humidity with ASTRAP calculations of the relative changes in atmospheric sulfate and nitrate particulate concentrations in a Monte Carlo approach to produce expected distributions of hourly particulate concentrations and RH. Light extinction relationships developed in theoretical and field studies are then used to calculate the resulting distribution of visibility impairment. Successive Monte Carlo studies are carried out to develop sets of visibility impairment distributions with and without the COVE emission reductions to gain insight into the detectability of expected visibility improvements.

Trexler, E.C. Jr. [USDOE, Washington, DC (United States); Shannon, J.D. [Argonne National Lab., IL (United States)

1995-06-01T23:59:59.000Z

70

Analysis of Lipid OxidationChapter 3 Ultraviolet-Visible Spectrophotometry in the Analysis of Lipid Oxidation  

Science Conference Proceedings (OSTI)

Analysis of Lipid Oxidation Chapter 3 Ultraviolet-Visible Spectrophotometry in the Analysis of Lipid Oxidation Methods and Analyses eChapters Methods - Analyses Books Downloadable pdf of Chapter 3 Ultraviolet-Visible

71

Parameterization of Runway Visual Range as a Function of Visibility: Implications for Numerical Weather Prediction Models  

Science Conference Proceedings (OSTI)

A parameterization of runway visual range (RVR) has been developed using relevant meteorological parameters such as visibility (Vk), relative humidity (RH), temperature (T), precipitation intensity (PI), and precipitation type (PT) measured in ...

Faisal S. Boudala; George A. Isaac; Robert W. Crawford; Janti Reid

2012-02-01T23:59:59.000Z

72

A New Visibility Parameterization for Warm-Fog Applications in Numerical Weather Prediction Models  

Science Conference Proceedings (OSTI)

The objective of this work is to suggest a new warm-fog visibility parameterization scheme for numerical weather prediction (NWP) models. In situ observations collected during the Radiation and Aerosol Cloud Experiment, representing boundary ...

I. Gultepe; M. D. Müller; Z. Boybeyi

2006-11-01T23:59:59.000Z

73

Dust Tracking Using Composite Visible/IR Images: A Case Study  

Science Conference Proceedings (OSTI)

Visible and infrared (IR) images from the National Oceanic and Atmospheric Administration's (NOAA's) Advanced Very High Resolution Radiometer are composited to improve the depiction of airborne dust over coastlines. On IR images, wind-raised dust ...

Thomas F. Lee

1989-06-01T23:59:59.000Z

74

An Automated, Observations-Based System for Short-Term Prediction of Ceiling and Visibility  

Science Conference Proceedings (OSTI)

Several methods of generating very short term (0–6 h) probabilistic forecasts of ceiling and visibility are investigated: 1) an observations-based (OBS-based) system in which potential predictors consist of weather observations from a network of ...

Robert L. Vislocky; J. Michael Fritsch

1997-03-01T23:59:59.000Z

75

Infrared and Visible Satellite Rain Estimation. Part I: A Grid Cell Approach  

Science Conference Proceedings (OSTI)

The relationships between satellite-viewed cloudy (or partly cloudy) grid cells and the variability of the precipitation contained therein are explored. Using a 32 km grid and 30 min interval visible, infrared and radar data, 5 days of the ...

Andrew J. Negri; Robert F. Adler

1987-11-01T23:59:59.000Z

76

Infrared and Visible Satellite Rain Estimation. Part II: A Cloud Definition Approach  

Science Conference Proceedings (OSTI)

This study examines the relationships between satellite infrared clouds and rainfall, and infrared-threshold visible clouds and rainfall. Clouds are defined by the outline of the 253 K isotherm. Cloud infrared area was highly correlated with rain ...

Andrew J. Negri; Robert F. Adler

1987-11-01T23:59:59.000Z

77

A Methodology for Measuring Cirrus Cloud Visible-to-Infrared Spectral Optical Depth Ratios  

Science Conference Proceedings (OSTI)

Knowledge of cirrus cloud optical depths is necessary to understand the earth’s current climate and to model the cloud radiation impact on future climate. Cirrus clouds, depending on the ratio of their shortwave “visible” to longwave “infrared” ...

Daniel H. DeSlover; William L. Smith; Paivi K. Piironen; Edwin W. Eloranta

1999-02-01T23:59:59.000Z

78

Use of Enhanced IR/Visible Satellite Imagery to Determine Heavy Snow Areas  

Science Conference Proceedings (OSTI)

Interpretation techniques are established which relate heavy snow (100 mm or more in a 12 h period) areas to real-time infrared and visible geostationary satellite imagery. An initial collection of cases totaled about 75 during the period from ...

Samuel K. Beckman

1987-09-01T23:59:59.000Z

79

Photocatalytic Oxidation of Aqueous Organic Contaminants by Semiconductors using Visible Light Radiation  

E-Print Network (OSTI)

· Continuously mixed Light Source · T5 8 watt florescent bulbs · "Daylight Spectrum" · Color Rendering Index 75Photocatalytic Oxidation of Aqueous Organic Contaminants by Semiconductors using Visible Light

Meyers, Steven D.

80

A Fuzzy Logic–Based Analog Forecasting System for Ceiling and Visibility  

Science Conference Proceedings (OSTI)

WIND-3 is an application for aviation weather forecasting that uses the analog method to produce deterministic predictions of cloud ceiling height and horizontal visibility at airports. For data, it uses historical and current airport ...

Bjarne Hansen

2007-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "visible piping visible" 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

An Intercalibration of METEOSAT-1 and GOES-2 Visible and Infrared Measurements  

Science Conference Proceedings (OSTI)

An intercomparison between radiative parameters determined from visible and infrared channels of the METEOSAT-1 and GOES-2 geosynchronous satellites has been carried out using data obtained over the central Atlantic Ocean for 5 November 1978. ...

David R. Brooks; Christopher F. England; Carry E. Hunt; Patrick Minnis

1984-09-01T23:59:59.000Z

82

Creating supply chain visibility : a case study on extending Intel's Unit Level Traceability to customers  

E-Print Network (OSTI)

In an effort to enable supply chain visibility for Intel products, the Customer Unit Level Traceability (ULT) Program was formed to help extend Intel's ULT capability to the customer level. Increased traceability of Intel ...

Kang, Annie

2012-01-01T23:59:59.000Z

83

Development of a Statistical Model for Forecasting Episodes of Visibility Degradation in the Denver Metropolitan Area  

Science Conference Proceedings (OSTI)

In 1990, the State of Colorado implemented a visibility standard of 0.076 km?1 of beta extinction for the Denver metropolitan area. Meteorologists with Colorado's Air Pollution Control Division forecast high pollution days associated with ...

P. J. Reddy; D. E. Barbarick; R. D. Osterburg

1995-03-01T23:59:59.000Z

84

Safety, visibility, and performance in a wide-area file system  

Science Conference Proceedings (OSTI)

As mobile clients travel, their costs to reach home filing services change, with serious performance implications. Current file systems mask these performance problems by reducing the safety of updates, their visibility, or both. This is the result of ...

Minkyong Kim; Landon P. Cox; Brian D. Noble

2002-01-01T23:59:59.000Z

85

The Identification and Verification of Hazardous Convective Cells over Oceans Using Visible and Infrared Satellite Observations  

Science Conference Proceedings (OSTI)

Three algorithms based on geostationary visible and infrared (IR) observations are used to identify convective cells that do (or may) present a hazard to aviation over the oceans. The performance of these algorithms in detecting potentially ...

Michael F. Donovan; Earle R. Williams; Cathy Kessinger; Gary Blackburn; Paul H. Herzegh; Richard L. Bankert; Steve Miller; Frederick R. Mosher

2008-01-01T23:59:59.000Z

86

Delineation of Precipitation Areas by Correlation of Meteosat Visible and Infrared Data with Radar Data  

Science Conference Proceedings (OSTI)

Methods of optimizing the Lovejoy and Austin technique to delineate areas of precipitation using visible and infrared satellite data are investigated. The technique involves training the satellite data by correlation with real-time radar data. ...

M. Cheng; R. Brown

1995-09-01T23:59:59.000Z

87

The Role of Visible Data in Improving Satellite Rain-Rate Estimates  

Science Conference Proceedings (OSTI)

Data from the first Algorithm Intercomparison Project(AIP/1) collected over Japan and surrounding waters in June, July, and August 1989 are used in this study to assess the importance of visible data in satellite rain estimation techniques. The ...

Patrick W. S. King; William D. Hogg; Philip A. Arkin

1995-07-01T23:59:59.000Z

88

Visible-Light Water-Splitting Performance of TiO - Programmaster.org  

Science Conference Proceedings (OSTI)

Presentation Title, Visible-Light Water-Splitting Performance of TiO2 ... Ammonia Borane for Chemical Hydrogen Storage: Effect of Nano-Confinement ... Thermodynamic Characterization on Hydrogen Absorption and Desorption Reactions of ...

89

Short-Term Probabilistic Forecasts of Ceiling and Visibility Utilizing High-Density Surface Weather Observations  

Science Conference Proceedings (OSTI)

An automated statistical system that utilizes regional high-density surface observations to forecast low ceiling and visibility events in the upper Midwest is presented. The system is based solely upon surface observations as predictors, ...

Stephen M. Leyton; J. Michael Fritsch

2003-10-01T23:59:59.000Z

90

Temporal and Spatial Visibility Variations in the Illinois Vicinity during 1949–80  

Science Conference Proceedings (OSTI)

Changes in visibility and the occurrence of smoke or haze during the last three decades are identified for eight locations in and around Illinois. The analyses utilize individual daily data and are performed on both seasonal and annual bases. ...

Peter G. Vinzani; Peter J. Lamb

1985-05-01T23:59:59.000Z

91

Wide-band quantum interface for visible-to-telecommunication wavelength conversion  

E-Print Network (OSTI)

We perform the first demonstration of a quantum interface for frequency down-conversion from visible to telecommunication bands by using a nonlinear crystal. This interface has a potential to work over wide bandwidths, leading to a high-speed interface of frequency conversion. We achieve the conversion of a pico-second visible photon at 780 nm to a 1522-nm photon, and observe that the conversion process retain entanglement between the down-converted photon and another photon.

Rikizo Ikuta; Yoshiaki Kusaka; Tsuyoshi Kitano; Hiroshi Kato; Takashi Yamamoto; Masato Koashi; Nobuyuki Imoto

2011-06-09T23:59:59.000Z

92

Modeling Analysis of the Big Bend Regional Aerosol and Visibility Observational (BRAVO) Study  

Science Conference Proceedings (OSTI)

Particulate sulfate compounds account for approximately half of the particulate matter (PM) during periods of poor visibility at Big Bend National Park (BBNP). Poor visibility is associated with two distinct meteorological regimes -- one dominated by flow from Mexico during spring and summer months and another characterized by transport from regions northeast of BBNP during fall months. Accordingly, the monitoring component of BRAVO took place from July to October 1999. More than 30 sites were establishe...

2004-02-24T23:59:59.000Z

93

OSTI Increases Visibility of DOE Science via WorldCat | OSTI, US Dept of  

Office of Scientific and Technical Information (OSTI)

Increases Visibility of DOE Science via WorldCat Increases Visibility of DOE Science via WorldCat NEWS MEDIA CONTACT: Cathey Daniels, (865) 576-9539 FOR IMMEDIATE RELEASE May 16, 2006 OSTI Increases Visibility of DOE Science via WorldCat Oak Ridge, TN - Librarians from around the world have a new avenue of access to research results from the U.S. Department of Energy (DOE). More than 120,000 records for DOE scientific and technical information are now available in WorldCat, a database merging catalogues of more than 50,000 libraries in 96 countries and territories. "The library community will have access to DOE report literature as never before," said Dr. Walter Warnick, director of the DOE Office of Scientific and Technical Information (OSTI). "This is one more way that OSTI makes R&D

94

A Comparison of Cirrus Cloud Visible Optical Depth Derived from Lidar  

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

Comparison of Cirrus Cloud Visible Optical Depth Derived from Lidar Comparison of Cirrus Cloud Visible Optical Depth Derived from Lidar Lo, Chaomei Pacific Northwest National Laboratory Comstock, Jennifer Pacific Northwest National Laboratory Flynn, Connor Pacific Northwest National Laboratory Category: Cloud Properties Optically thin clouds (e.g. optical depth < 3) can have a significant impact on radiative heating in the atmosphere, particularly in the cold upper troposphere. Currently, there is no value-added product (VAP) in the Atmospheric Radiation Measurement (ARM) program archive that produces thin cloud optical depth, particularly at the Tropical Western Pacific and North Slope of Alaska sites. A VAP is under development to obtain the cirrus cloud visible optical depth from the MPLNOR (Micro Pulse Lidar Normalized

95

Oblique Aerial & Ground Visible Band & Thermographic Imaging | Open Energy  

Open Energy Info (EERE)

Oblique Aerial & Ground Visible Band & Thermographic Imaging Oblique Aerial & Ground Visible Band & Thermographic Imaging Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Oblique Aerial & Ground Visible Band & Thermographic Imaging Details Activities (0) Areas (0) Regions (0) NEPA(0) Exploration Technique Information Exploration Group: Remote Sensing Techniques Exploration Sub Group: Passive Sensors Parent Exploration Technique: Passive Sensors Information Provided by Technique Lithology: Stratigraphic/Structural: Hydrological: Thermal: Cost Information Low-End Estimate (USD): 400.0040,000 centUSD 0.4 kUSD 4.0e-4 MUSD 4.0e-7 TUSD / Subject Median Estimate (USD): 450.0045,000 centUSD 0.45 kUSD 4.5e-4 MUSD 4.5e-7 TUSD / Subject High-End Estimate (USD): 6,000.00600,000 centUSD

96

FUSION OF VISIBLE AND INFRARED IMAGES USING EMPIRICAL MODE DECOMPOSITION TO IMPROVE FACE RECOGNITION  

E-Print Network (OSTI)

FUSION OF VISIBLE AND INFRARED IMAGES USING EMPIRICAL MODE DECOMPOSITION TO IMPROVE FACE of Tennessee, Knoxville, TN-37996 ABSTRACT In this effort, we propose a new image fusion technique, utilizing). In this method, we decompose images from different imaging modalities into their IMFs. Fusion is performed

Koschan, Andreas

97

The Operational Calibration of Images Taken in the Visible Channel of the Meteosat Series of Satellites  

Science Conference Proceedings (OSTI)

A method and its implementation are presented for the automatic calibration of the images taken in the visible channel of the Meteosat series of satellites. The method performs on a daily basis and is based on a statistical analysis of two images:...

Christelle Rigollier; Mireille Lefčvre; Philippe Blanc; Lucien Wald

2002-09-01T23:59:59.000Z

98

Sample based visibility for soft shadows using alias-free shadow maps  

Science Conference Proceedings (OSTI)

This paper introduces an accurate real-time soft shadow algorithm that uses sample based visibility. Initially, we present a GPU-based alias-free hard shadow map algorithm that typically requires only a single render pass from the light, in contrast ...

Erik Sintorn; Elmar Eisemann; Ulf Assarsson

2008-06-01T23:59:59.000Z

99

Liquid Water Content of Fogs and Hazes from Visible Light Scattering  

Science Conference Proceedings (OSTI)

A new method is proposed for measuring the liquid water content of fogs and hazes. It consists of a planar circular light sensor placed perpendicular to and coaxial with a narrow collimated light beam of a visible wavelength. The direct light ...

H. Gerber

1984-08-01T23:59:59.000Z

100

Wavelet-based image watermarking with visibility range estimation based on HVS and neural networks  

Science Conference Proceedings (OSTI)

This work proposes a wavelet-based image watermarking (WIW) technique, based on the human visible system (HVS) model and neural networks, for image copyright protection. A characteristic of the HVS, which is called the just noticeable difference (JND) ... Keywords: Human visual system, Image watermarking, Just noticeable difference, Neural networks, Wavelet transformation

Hung-Hsu Tsai; Chi-Chih Liu

2011-04-01T23:59:59.000Z

Note: This page contains sample records for the topic "visible piping visible" 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

Wind Tunnel Experiment for Predicting a Visible Plume Region from a Nuclear Power Plant Cooling Tower  

Science Conference Proceedings (OSTI)

The current paper introduces a wind tunnel experiment to study the effect of the cooling tower of a Nuclear Power Plant (NPP) on the flow and the characteristics of visible plume regions. The relevant characteristics of the flow field near the ...

Guo Dong-peng; Yao Ren-tai; Fan Dan

102

PICOntrol: using a handheld projector for direct control of physical devices through visible light  

Science Conference Proceedings (OSTI)

Today's environments are populated with a growing number of electric devices which come in diverse form factors and provide a plethora of functions. However, rich interaction with these devices can become challenging if they need be controlled from a ... Keywords: handheld projector, physical devices, visible light communication

Dominik Schmidt; David Molyneaux; Xiang Cao

2012-10-01T23:59:59.000Z

103

A visibility algorithm for converting 3D meshes into editable 2D vector graphics  

Science Conference Proceedings (OSTI)

Artists often need to import and embellish 3D models coming from CAD-CAM into 2D vector graphics software to produce, e.g., brochures or manuals. Current automatic solutions tend to result, at best, in a 2D triangle soup and artists often have to trace ... Keywords: NPR, geometry processing, vector graphics, visibility

Elmar Eisemann; Sylvain Paris; Frédo Durand

2009-07-01T23:59:59.000Z

104

A simplified physical model for assessing solar radiation over Brazil using GOES 8 visible imagery  

E-Print Network (OSTI)

A simplified physical model for assessing solar radiation over Brazil using GOES 8 visible imagery; published 30 January 2004. [1] Solar radiation assessment by satellite is constrained by physical.4 and 1.3 MJ mĂ?2 for daily irradiation). A comparison with monthly means from about 80 automatic weather

105

Visible structures  

E-Print Network (OSTI)

All architecture is the interplay between structure, surface and ornament. Traditionally, ornament adorned structure thereby giving it its meaning. A society with its intellectual foundations resting in faith or the abstract ...

Conway, Helene Marie

1991-01-01T23:59:59.000Z

106

Growth and depth dependence of visible luminescence in wurtzite InN epilayers  

SciTech Connect

We present detailed investigation of growth and depth dependence of visible ({approx}1.9 eV) photoluminescence (PL) in wurtzite InN epilayers grown by magnetron sputtering. For normal surface incidence, PL peak was found to redshift with increasing growth temperatures. Cross-sectional PL measurements were able to separate contributions from the InN epilayers and sapphire substrates, which not only demonstrated the visible luminescence in InN but also revealed the blueshift of the PL peak with laser spot focusing from epilayer surface toward the interface. The results have been well explained by the growth mechanism and residual strain along growth direction of InN epilayers.

Pu, X.D.; Shen, W.Z.; Zhang, Z.Q.; Ogawa, H.; Guo, Q.X. [Laboratory of Condensed Matter Spectroscopy and Opto-Electronic Physics, Department of Physics, Shanghai Jiao Tong University, 1954 Hua Shan Road, Shanghai 200030 (China); Department of Electrical and Electronic Engineering, Faculty of Science and Engineering, Saga University, Saga 840-8502 (Japan)

2006-04-10T23:59:59.000Z

107

Tunable Transmittance of Near-infrared and Visible Light in Reconstructed  

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

Tunable Transmittance of Near-infrared and Visible Light in Reconstructed Tunable Transmittance of Near-infrared and Visible Light in Reconstructed Nanocrystal-in-Glass Composite Films Thursday, October 31, 2013 The bonding arrangement in amorphous materials plays a dominant role in determining their electrochemical, optical and transport properties. However, it remains a challenge to manipulate amorphous structures in a controlled manner. Recently, scientists at the Molecular Foundry at Lawrence Berkeley National Laboratory (LBNL) developed synthetic protocols for incorporating well-defined nanocrystals into amorphous materials [1,2]. This "nanocrystal-in-glass" approach not only allows combining two functional components in one material, but it could also provide a handle, by virtue of the interfacial covalent bond, for manipulating the glass

108

Cloud Properties Derived from Visible and Near-infrared Reflectance in the  

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

Cloud Properties Derived from Visible and Near-infrared Reflectance in the Cloud Properties Derived from Visible and Near-infrared Reflectance in the Presence of Aerosols Hofmann, Odele University of Colorado at Boulder Pilewskie, Peter University of Colorado Gore, Warren NASA Ames Research Center Russell, Phil NASA Ames Research Center Livingston, John SRI International Redemann, Jens BAERI/NASA Ames Research Center Bergstrom, Robert Bay Area Environmental Research Institute Platnick, Steven NASA-GSFC Daniel, John NOAA Aeronomy Laboratory Category: Cloud Properties The New England Air Quality Study - Intercontinental Transport and Chemical Transformation (NEAQS-ITCT) experiment conducted in July-August 2004 included objectives on the effects of urban-industrial pollution aerosols on cloud radiative properties, the so-called indirect effect. Measurements

109

About ÂŤEffectiveÂŽ Height of the Aerosol Atmosphere in Visible and IR Wavelength Range  

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

"Effective" Height of the Aerosol Atmosphere in "Effective" Height of the Aerosol Atmosphere in Visible and IR Wavelength Range V. N. Uzhegov, D. M. Kabanov, M. V. Panchenko, Yu. A. Pkhalagov, and S. M. Sakerin Institute of Atmospheric Optics Tomsk, Russia Introduction Aerosol component of the atmosphere is one of the important factors affecting the radiation budget of the space - atmosphere - underlying surface system in visible and infrared (IR) wavelength ranges. It is extremely important to take into account the contribution of this component into the extinction of solar radiation under cloudless sky conditions. Sometimes it is important to know not only the total value of the aerosol component of extinction, but also to have the possibility to estimate the "effective" height of

110

Bayesian estimation of Zeff in the TEXTOR tokamak from visible bremsstrahlung and CXRS measurements  

SciTech Connect

The determination of Zeff in a fusion plasma is associated with many difficulties. Several diagnostic methods exist for this purpose, each with its specific weaknesses. Here we consider the derivation of Zeff from bremsstrahlung measurements in the visible and from a weighted summation of individual impurity densities, calculated from CXRS intensities. In a first approach towards an improved estimation of Zeff, which is consistent with both measurement sets, we combine in a single model the measurement of visible bremsstrahlung emissivities and carbon densities obtained from CXRS. Together with Zeff, the electron density ne is estimated using a hybrid Gibbs-Metropolis-Hastings MCMC algorithm. Some first results are presented and some improvements in and extensions of the employed model are discussed.

Verdoolaege, G.; Oost, G. van [Nuclear Fusion group, Department of Applied Physics, Ghent University, Rozier 44, 9000 Gent (Belgium); Ichir, M.M.; Mohammad-Djafari, A. [Laboratoire des Signaux et Systemes (L2S), CNRS-Supelec-UPS, Supelec, Plateau de Moulon, 91192 Gif-sur-Yvette Cedex (France); Hellermann, M.G. von [FOM-Institute for Plasma Physics Rijnhuizen, Association EURATOM-FOM, PO Box 1207, 3430 BE Nieuwegein (Netherlands)

2005-11-23T23:59:59.000Z

111

Components of disaster-tolerant computing: analysis of disaster recovery, IT application downtime and executive visibility  

Science Conference Proceedings (OSTI)

This paper provides a review of disaster-tolerant Information Technology (IT). The state of traditional disaster recovery approaches is outlined. The risks of IT application downtime attributable to the increasing dependence on critical information ... Keywords: IT application availability, IT application downtime, business continuity, complex infrastructure systems, criticality-driven, disaster recovery, disaster tolerance, disaster-tolerant computing, emergency management, executive visibility, information technology, interaction, interdependent, survivability

Chad M. Lawler; Michael A. Harper; Stephen A. Szygenda; Mitchell A. Thornton

2008-02-01T23:59:59.000Z

112

Congressional Addressees Subject: Air Pollution: Air Quality, Visibility, and the Potential Impacts of Coal-  

E-Print Network (OSTI)

east-central Nevada and is home to diverse geologic, topographic, and wildlife resources—including ancient bristlecone pines, the world’s longest living tree species. The park was created to preserve a representative segment of the Great Basin Region and receives about 80,000 visitors annually. The park features numerous scenic areas with views of the surrounding landscape, which includes both deserts and mountains. The National Park Service (NPS), within the Department of the Interior, is responsible for managing the park, and the park’s management plan lists both air quality and visibility as outstanding resources. This plan identifies threats to air quality and visibility—including air pollution from the possible development of coal-fired power plants in the region—and states that even slight increases in air pollution could cause major decreases in visibility. In 2004 and 2006, two companies each initiated the process to build new coal-fired power plants about 55 miles northwest of Great Basin National Park, near the city of Ely, Nevada. 1 While the development of these new power plants would provide jobs,

Great Basin; National Park

2009-01-01T23:59:59.000Z

113

Nonhydrostatic, Mesobeta-Scale Model Simulations of Cloud Ceiling and Visibility for an East Coast Winter Precipitation Event  

Science Conference Proceedings (OSTI)

Experiments are described that provide an example of the baseline skill level for the numerical prediction of cloud ceiling and visibility, where application to aviation-system safety and efficiency is emphasized. Model simulations of a light, ...

Mark T. Stoelinga; Thomas T. Warner

1999-04-01T23:59:59.000Z

114

First Results from the On-Orbit Calibrations of the Visible and Infrared Scanner for the Tropical Rainfall Measuring Mission  

Science Conference Proceedings (OSTI)

This work presents the first on-orbit calibration results using the Moon, the Sun, and cold deep space as inputs to the Visible and Infrared Scanner (VIRS) on board the Tropical Rainfall Measuring Mission (TRMM) satellite. The authors have ...

Cheng-Hsuan Lyu; William L. Barnes; Robert A. Barnes

2000-04-01T23:59:59.000Z

115

The Influence of Meteorological Conditions and Atmospheric Circulation Types on PM10 and Visibility in Tel Aviv  

Science Conference Proceedings (OSTI)

A 3-yr dataset (February 2000–November 2002) of 30-min averages for particulates, visibility, and meteorological data were analyzed to examine the dependence of particulate matter of less than 10 ?m in diameter (PM10) mass concentrations and ...

Uri Dayan; Ilan Levy

2005-05-01T23:59:59.000Z

116

A Parameterization of the Visible Extinction Coefficient of Ice Clouds in Terms of the Ice/Water Content  

Science Conference Proceedings (OSTI)

This article describes a parameterization of the visible extinction coefficient of cirrus and frontal ice cloud in terms of the ice/water content. The parameterization is based on the discovery that the ice cloud particle size spectra from a ...

C. Martin R. Platt

1997-08-01T23:59:59.000Z

117

Inference of Cirrus Cloud Properties Using Satellite-observed Visible and Infrared Radiances. Part I: Parameterization of Radiance Fields  

Science Conference Proceedings (OSTI)

Current techniques for deriving cirrus optical depth and altitude from visible (0.65 ?m) and infrared (11.5 ?m) satellite data use radiative transfer calculations based on scattering phase functions of spherical water droplets. This study ...

Patrick Minnis; Kuo-Nan Liou; Yoshihide Takano

1993-05-01T23:59:59.000Z

118

Visible and dark matter in M 31 - II. A dynamical model and dark matter density distribution  

E-Print Network (OSTI)

In the present paper we derive the density distribution of dark matter (DM) in a well-observed nearby disc galaxy, the Andromeda galaxy. From photometrical and chemical evolution models constructed in the first part of the study (Tamm, Tempel & Tenjes 2007 (arXiv:0707.4375), hereafter Paper I) we can calculate the mass distribution of visible components (the bulge, the disc, the stellar halo, the outer diffuse stellar halo). In the dynamical model we calculate stellar rotation velocities along the major axis and velocity dispersions along the major, minor and intermediate axes of the galaxy assuming triaxial velocity dispersion ellipsoid. Comparing the calculated values with the collected observational data, we find the amount of DM, which must be added to reach an agreement with the observed rotation and dispersion data. We conclude that within the uncertainties, the DM distributions by Moore, Burkert, Navarro, Frenk & White (NFW) and the Einasto fit with observations nearly at all distances. The NFW and Einasto density distributions give the best fit with observations. The total mass of M 31 with the NFW DM distribution is 1.19*10^12 M_sun, the ratio of the DM mass to the visible mass is 10.0. For the Einasto DM distribution, these values are 1.28*10^12 M_sun and 10.8. The ratio of the DM mass to the visible mass inside the Holmberg radius is 1.75 for the NFW and the Einasto distributions. For different cuspy DM distributions, the virial mass is in a range 6.9-7.9*10^11 M_sun and the virial radius is ~150 kpc. The DM mean densities inside 10 pc for cusped models are 33 and 16 M_sun pc^-3 for the NFW and the Einasto profiles, respectively. For the cored Burkert profile, this value is 0.06 M_sun pc^-3.

Elmo Tempel; Antti Tamm; Peeter Tenjes

2007-07-30T23:59:59.000Z

119

Xenon ion laser-induced fluorescence using a visible tunable diode laser near 680 nm  

SciTech Connect

Laser-induced fluorescence (LIF) measurements have been performed for the first time in a low temperature (T{sub e}{approx_equal}0.6 eV) Xe plasma using a tunable diode laser in the visible range of wavelengths. The transition in Xe II involved the ({sup 3}P{sub 1})5d[3]{sub 7/2} metastable state and the excitation wavelength was found to be 680.570{+-}0.001 nm (air). LIF measurements of I{sub 2} in a room temperature iodine gas cell were used to monitor the wavelength of the laser during the measurements.

Severn, Greg; Lee, Dongsoo; Hershkowitz, Noah [Department of Physics, University of San Diego, San Diego, California 92110 (United States); Department of Engineering Physics, University of Wisconsin at Madison, Madison, Wisconsin 53706 (United States)

2007-11-15T23:59:59.000Z

120

Concept development for the ITER equatorial port visible/infrared wide angle viewing system  

Science Conference Proceedings (OSTI)

The ITER equatorial port visible/infrared wide angle viewing system concept is developed from the measurement requirements. The proposed solution situates 4 viewing systems in the equatorial ports 3, 9, 12, and 17 with 4 views each (looking at the upper target, the inner divertor, and tangentially left and right). This gives sufficient coverage. The spatial resolution of the divertor system is 2 times higher than the other views. For compensation of vacuum-vessel movements, an optical hinge concept is proposed. Compactness and low neutron streaming is achieved by orienting port plug doglegs horizontally. Calibration methods, risks, and R and D topics are outlined.

Reichle, R.; Beaumont, B.; Boilson, D.; Bouhamou, R.; Direz, M.-F.; Encheva, A.; Henderson, M.; Kazarian, F.; Lamalle, Ph.; Lisgo, S.; Mitteau, R.; Patel, K. M.; Pitcher, C. S.; Pitts, R. A.; Prakash, A.; Raffray, R.; Schunke, B.; Snipes, J.; Diaz, A. Suarez; Udintsev, V. S. [ITER Organization, Route de Vinon-sur-Verdon, 13115 St Paul-lez-Durance (France); and others

2012-10-15T23:59:59.000Z

Note: This page contains sample records for the topic "visible piping visible" 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

Visible/Near-Infrared Hyperspectral Sensing of Solids under Controlled Environmental Conditions  

SciTech Connect

We describe the use of a wind tunnel for conducting controlled passive hyperspectral imaging experiments. Passive techniques are potentially useful for detecting explosives, solid-phase chemicals and other materials of interest from a distance so as to provide operator safety. The Pacific Northwest National Laboratory operates a wind tunnel facility that can generate and circulate artificial atmospheres to control lighting, humidity, temperature, aerosol burdens, and obscurants. We will present recent results describing optimized sensing of solids over tens of meters distance using both visible and near-infrared cameras, as well as the effects of certain environmental parameters on data retrieval.

Bernacki, Bruce E.; Anheier, Norman C.; Mendoza, Albert; Fritz, Brad G.; Johnson, Timothy J.

2011-06-01T23:59:59.000Z

122

The Visibility of Galactic Bars and Spiral Structure At High Redshifts  

E-Print Network (OSTI)

We investigate the visibility of galactic bars and spiral structure in the distant Universe by artificially redshifting 101 B-band CCD images of local spiral galaxies from the Ohio State University Bright Spiral Galaxy Survey. Our artificially redshifted images correspond to Hubble Space Telescope I-band observations of the local galaxy sample seen at z=0.7, with integration times matching those of both the very deep Northern Hubble Deep Field data, and the much shallower Flanking Field observations. The expected visibility of galactic bars is probed in two ways: (1) using traditional visual classification, and (2) by charting the changing shape of the galaxy distribution in "Hubble space", a quantitative two-parameter description of galactic structure that maps closely on to Hubble's original tuning fork. Both analyses suggest that over 2/3 of strongly barred luminous local spirals i.e. objects classified as SB in the Third Reference Catalog) would still be classified as strongly barred at z=0.7 in the Hubbl...

Van den Bergh, S; Whyte, L F; Merrifield, M R; Eskridge, P B; Frogel, J A; Pogge, R W; Bergh, Sidney van den; Abraham, Roberto G.; Whyte, Laura F.; Merrifield, Michael R.; Eskridge, Paul; Frogel, Jay A.; Pogge, Richard

2002-01-01T23:59:59.000Z

123

Fabrication and characterization of the source grating for visibility improvement of neutron phase imaging with gratings  

SciTech Connect

The fabrication of gratings including metal deposition processes for highly neutron absorbing lines is a critical issue to achieve a good visibility of the grating-based phase imaging system. The source grating for a neutron Talbot-Lau interferometer is an array of Gadolinium (Gd) structures that are generally made by sputtering, photo-lithography, and chemical wet etching. However, it is very challenging to fabricate a Gd structure with sufficient neutron attenuation of approximately more than 20 {mu}m using a conventional metal deposition method because of the slow Gd deposition rate, film stress, high material cost, and so on. In this article, we fabricated the source gratings for neutron Talbot-Lau interferometers by filling the silicon structure with Gadox particles. The new fabrication method allowed us a very stable and efficient way to achieve a much higher Gadox filled structure than a Gd film structure, and is even more suitable for thermal polychromatic neutrons, which are more difficult to stop than cold neutrons. The newly fabricated source gratings were tested at the polychromatic thermal neutron grating interferometer system of HANARO at the Korea Atomic Energy Research Institute, and the visibilities and images from the neutron phase imaging system with the new source gratings were compared with those fabricated by a Gd deposition method.

Kim, Jongyul [Neutron Science Division, Korea Atomic Energy Research Institute, Daejeon 305-353 (Korea, Republic of); Nuclear and Quantum Engineering Department, Korea Advanced Institute of Science and Technology, Daejeon 305-701 (Korea, Republic of); Lee, Kye Hong; Lim, Chang Hwy; Kim, Taejoo [Neutron Science Division, Korea Atomic Energy Research Institute, Daejeon 305-353 (Korea, Republic of); Ahn, Chi Won [Nano Fusion Technology Division, National Nanofab Center, Daejeon 305-701 (Korea, Republic of); Cho, Gyuseong [Nuclear and Quantum Engineering Department, Korea Advanced Institute of Science and Technology, Daejeon 305-701 (Korea, Republic of); Lee, Seung Wook [School of Mechanical Engineering, Pusan National University, Pusan 609-735 (Korea, Republic of)

2013-06-15T23:59:59.000Z

124

Band-engineered SrTiO{sub 3} nanowires for visible light photocatalysis  

Science Conference Proceedings (OSTI)

We have theoretically investigated the structural, electronic, and optical properties of perovskite SrTiO{sub 3} nanowires for use in visible light photocatalytic applications using pseudopotential density-functional theory calculations. The electronic structure calculations show that the band gap is modified in the SrTiO{sub 3} nanowires compared with that of the bulk. For TiO{sub 2}-terminated nanowires, the mid-band states induced by the combination of oxygen and strontium atoms on the surface lead to a shift in the valence band toward the conduction band without interference from the edge of the conduction band, which reduces the band gap. On the contrary, the electronic states induced by the combination of oxygen and strontium atoms on the surface of SrO-terminated nanowires lead to a shift in the conduction band toward the valence band. The calculated optical results indicate that the absorption edge of the nanowires shift towards the red-light region. These theoretical results suggest that perovskite SrTiO{sub 3} nanowires are promising candidates for use in visible light photocatalytic processes such as solar-assisted water splitting reactions.

Fu, Q.; He, T.; Li, J. L.; Yang, G. W. [State Key Laboratory of Optoelectronic Materials and Technologies, Institute of Optoelectronic and Functional Composite Materials, Nanotechnology Research Center, School of Physics and Engineering, Sun Yat-sen University, Guangzhou 510275, Guangdong (China)

2012-11-15T23:59:59.000Z

125

TiO{sub 2}/carbon nanotube hybrid nanostructures: Solvothermal synthesis and their visible light photocatalytic activity  

Science Conference Proceedings (OSTI)

MWCNT/TiO{sub 2} hybrid nanostructures were prepared via solvothermal synthesis and sol-gel method with benzyl alcohol as a surfactant. As-prepared hybrid materials were characterized by X-ray diffraction, transmission electron microscopy, UV-vis diffuse reflectance spectra and X-ray photoelectron spectroscopy. The results showed that MWCNTs were uniformly decorated with anatase nanocrystals in solvothermal condition, but MWCNTs were embedded in a majority of TiO{sub 2} nanoparticles by sol-gel method. When the weight ratio of MWCNTs to TiO{sub 2} was 20%, MWCNT/TiO{sub 2} hybrid nanostructures prepared by solvothermal synthesis exhibited higher visible-light-driven photocatalytic activity than that prepared by sol-gel method. Post-annealing of MWCNT/TiO{sub 2} nanostructures at 400 deg. C resulted in the formation of the carbonaceous Ti-C bonds on the interface between TiO{sub 2} and MWCNTs, which enhanced the photoabsorbance of the hybrid materials in the visible light region and improved the visible-light degradation efficiency of methylene blue. - Graphical abstract: MWCNT/TiO{sub 2} nanostructures have been prepared by solvothermal method, which exhibited higher visible-light-driven photocatalytic activity than that prepared by sol-gel method. The carbonaceous Ti-C bonds on the interface between TiO{sub 2} and MWCNTs enhanced the photoabsorbance of the hybrid materials in the visible light region. Highlights: > Anatase TiO{sub 2} nanoparticles were anchored on CNTs surface uniformly via solvothermal method {yields} The morphology facilitated the electron transfer between CNTs and TiO{sub 2} {yields} Ti-C bonds extended the absorption of MWCNT/TiO{sub 2} to the whole visible light region. > The hybrid nanostructures showed enhanced visible-light induced photocatalytic activity.

Tian Lihong [College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072 (China); College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062 (China); Ye Liqun [College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072 (China); Deng Kejian [Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission and Ministry of Education, South-Central University for Nationalities, Wuhan 430074 (China); Zan Ling, E-mail: irlab@whu.edu.cn [College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072 (China)

2011-06-15T23:59:59.000Z

126

Detecting Drizzle in Marine Warm Clouds Using Visible, Infrared, and Microwave Satellite Data  

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

Drizzle in Marine Warm Clouds Drizzle in Marine Warm Clouds Using Visible, Infrared, and Microwave Satellite Data H. Shao and G. Liu Florida State University Tallahassee, Florida Introduction Determining the radiative effects of aerosols is one of the most important areas in climate research. There are observational evidences showing that aerosols can affect the radiative balance of the earth indirectly - as the number of aerosols increases, water in the cloud spreads over many more particles. Large concentrations of small droplets not only make the cloud more reflective, but also reduce the probability of rainfall and prolong cloud lifetime, because small droplets have less efficiency of coalescence (e.g., Albrecht 1989, Rosenfeld 2000). Since precipitation is a key component in

127

Argonne CNM Highlight: Gold nanoparticles create visible-light catalysis in  

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

Silver chloride-gold nanoparticles Gold-coated silver chloride (AgCl) nanowires at the microscopic level. In the News United Press International | PhysOrg.com | R&D Magazine| Nanotechnology Now | Photonics.com Gold nanoparticles create visible-light catalysis in nanowires A two-step approach has been developed within the Nanophotonics Group to synthesize AgCl nanowires decorated with gold nanoparticles by using silver nanowires as chemical templates. In the first step, the silver nanowires are chemically oxidized and converted to AgCl nanowires. In the second step, ions generated in the first step reduce gold precursors (e.g., NaAuCl4) to deposit gold nanoparticles on the AgCl nanowire surfaces, resulting in the formation of AgCl:gold composite nanowires. Because of the

128

Single-photon detection timing jitter in a visible light photon counter  

E-Print Network (OSTI)

Visible light photon counters (VLPCs) offer many attractive features as photon detectors, such as high quantum efficiency and photon number resolution. We report measurements of the single-photon timing jitter in a VLPC, a critical performance factor in a time-correlated single-photon counting measurement, in a fiber-coupled closed-cycle cryocooler. The measured timing jitter is 240 ps full-width-at-half-maximum at a wavelength of 550 nm, with a dark count rate of 25 000 counts per second. The timing jitter increases modestly at longer wavelengths to 300 ps at 1000 nm, and increases substantially at lower bias voltages as the quantum efficiency is reduced.

Burm Baek; Kyle S. McKay; Martin J. Stevens; Jungsang Kim; Henry H. Hogue; Sae Woo Nam

2009-11-30T23:59:59.000Z

129

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

130

Shocktube driven BiF visible chemical laser. I - Numerical modeling of combustion driven shocktube experiments  

SciTech Connect

Calculations to determine the utility of an HF combustion-driven shocktube in the development of BiF(A-X) visible chemical lasers are presented. The calculations were performed with a one-dimensional reactive-flow Euler solver. The Euler solver uses a time-step split algorithm to advance the calculation over a time interval. A robust design can be developed that will simulate the heating produced in the FN3/TMB/He laser-gas mixture by a CO2 laser. Small amounts of water need to be included in the H2/F2/He driver gas mixture to assist in the thermalization of the vibrationally hot HF. 8 refs.

Smith, W.; Acebal, R.; Benard, D.J.; Graves, B. (Science Applications International Corp., Marietta, GA (United States) Rockwell International Science Center, Thousand Oaks, CA (United States) U.S. Army, Missile Command, Redstone Arsenal, AL (United States))

1992-07-01T23:59:59.000Z

131

Two-photon (VUV + visible) resonance ionization spectroscopy of molecular hydrogen  

DOE Green Energy (OSTI)

Two-photon transitions have been examined in molecular hydrogen using coherent vacuum ultraviolet (VUV) photons at a fixed wavelength of 118 nm and a tunable photon from a dye laser. Though the VUV intensity is very weak (/approximately/100 nJ per pulse) it was utilized very efficiently since most VUV photons in the ionoization region were absorbed. This is the first time that coherent VUV light has been employed with tunable visible light for the production of two-photon spectra and the measurement of two-photon rates. A new parameter is proposed for direct comparison of the data from various two-photon experiments. 4 refs., 2 figs., 1 tab.

McCann, M.P.; Chen, C.H.; Payne, M.G.

1988-04-01T23:59:59.000Z

132

Low cost alternative of high speed visible light camera for tokamak experiments  

SciTech Connect

We present design, analysis, and performance evaluation of a new, low cost and high speed visible-light camera diagnostic system for tokamak experiments. The system is based on the camera Casio EX-F1, with the overall price of approximately a thousand USD. The achieved temporal resolution is up to 40 kHz. This new diagnostic was successfully implemented and tested at the university tokamak GOLEM (R = 0.4 m, a = 0.085 m, B{sub T} < 0.5 T, I{sub p} < 4 kA). One possible application of this new diagnostic at GOLEM is discussed in detail. This application is tomographic reconstruction for estimation of plasma position and emissivity.

Odstrcil, T.; Grover, O.; Svoboda, V. [Czech Technical University in Prague, FNSPE, Brehova 7, CZ-115 19 Praha 1 (Czech Republic); Odstrcil, M.; Duran, I.; Mlynar, J. [Czech Technical University in Prague, FNSPE, Brehova 7, CZ-115 19 Praha 1 (Czech Republic); Institute of Plasma Physics AS CR, v.v.i., Association Euratom-IPP.CR, Za Slovankou 3, CZ-182 00 Praha 8 (Czech Republic)

2012-10-15T23:59:59.000Z

133

Solvothermal synthesis of designed nonstoichiometric strontium titanate for efficient visible-light photocatalysis  

SciTech Connect

SrTiO{sub 3} powders with various Sr/Ti atomic ratios were synthesized by microwave-assisted solvothermal reactions of SrCl{sub 2} and Ti(OC{sub 3}H{sub 7}){sub 4} in KOH aqueous solutions. The nanoparticles of perovskite type SrTiO{sub 3} structure with the particle size of 30-40 nm were synthesized. The photocatalytic activity was determined by deNO{sub x} ability using light emitting diode lamps of various wavelengths such as 627 nm (red), 530 nm (green), 445 nm (blue), and 390 nm (UV). The photocatalytic activity significantly changed depending on the Sr/Ti atomic ratio, i.e., the strontium rich sample (Sr/Ti atomic ratio>1) showed excellent visible light responsive photocatalytic activity for the oxidative destruction of NO.

Sulaeman, Uyi; Yin, Shu; Sato, Tsugio [Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577 (Japan)

2010-09-06T23:59:59.000Z

134

Ralph: A Visible/Infrared Imager for the New Horizons Pluto/Kuiper Belt Mission  

E-Print Network (OSTI)

The New Horizons instrument named Ralph is a visible/near infrared multi-spectral imager and a short wavelength infrared spectral imager. It is one of the core instruments on New Horizons, NASA's first mission to the Pluto/Charon system and the Kuiper Belt. Ralph combines panchromatic and color imaging capabilities with IR imaging spectroscopy. Its primary purpose is to map the surface geology and composition of these objects, but it will also be used for atmospheric studies and to map the surface temperature. It is a compact, low-mass (10.5 kg), power efficient (7.1 W peak), and robust instrument with good sensitivity and excellent imaging characteristics. Other than a door opened once in flight, it has no moving parts. These characteristics and its high degree of redundancy make Ralph ideally suited to this long-duration flyby reconnaissance mission.

Reuter, Dennis C; Scherrer, John; Jennings, Donald E; Baer, James; Hanley, John; Hardaway, Lisa; Lunsford, Allen; McMuldroch, Stuart; Moore, Jeffrey; Olkin, Cathy; Parizek, Robert; Reitsma, Harold; Sabatke, Derek; Spencer, John; Stone, John; Throop, Henry; Van Cleve, Jeffrey; Weigle, Gerald E; Young, Leslie A

2007-01-01T23:59:59.000Z

135

Ralph: A Visible/Infrared Imager for the New Horizons Pluto/Kuiper Belt Mission  

E-Print Network (OSTI)

The New Horizons instrument named Ralph is a visible/near infrared multi-spectral imager and a short wavelength infrared spectral imager. It is one of the core instruments on New Horizons, NASA's first mission to the Pluto/Charon system and the Kuiper Belt. Ralph combines panchromatic and color imaging capabilities with IR imaging spectroscopy. Its primary purpose is to map the surface geology and composition of these objects, but it will also be used for atmospheric studies and to map the surface temperature. It is a compact, low-mass (10.5 kg), power efficient (7.1 W peak), and robust instrument with good sensitivity and excellent imaging characteristics. Other than a door opened once in flight, it has no moving parts. These characteristics and its high degree of redundancy make Ralph ideally suited to this long-duration flyby reconnaissance mission.

Dennis C. Reuter; S. Alan Stern; John Scherrer; Donald E. Jennings; James Baer; John Hanley; Lisa Hardaway; Allen Lunsford; Stuart McMuldroch; Jeffrey Moore; Cathy Olkin; Robert Parizek; Harold Reitsma; Derek Sabatke; John Spencer; John Stone; Henry Throop; Jeffrey Van Cleve; Gerald E. Weigle; Leslie A. Young

2007-09-26T23:59:59.000Z

136

Neural Network and Multiple Linear Regression for Estimating Surface Albedo from ASTER Visible and Near-Infrared Spectral Bands  

Science Conference Proceedings (OSTI)

The current Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER)-based broadband albedo model requires shortwave infrared bands 5 (2.145–2.185 nm), 6 (2.185–2.225 nm), 8 (2.295–2.365 nm), and 9 (2.360–2.430 nm) and visible/near-...

Mohammad H. Mokhtari; Ibrahim Busu; Hossein Mokhtari; Gholamreza Zahedi; Leila Sheikhattar; Mohammad A. Movahed

2013-04-01T23:59:59.000Z

137

Assessing Moonlight Availability for Nighttime Environmental Applications by Low-Light Visible Polar-Orbiting Satellite Sensors  

Science Conference Proceedings (OSTI)

The next-generation U.S. polar-orbiting environmental satellite program, the Joint Polar Satellite System (JPSS), promises unprecedented capabilities for nighttime remote sensing by way of the day/night band (DNB) low-light visible sensor. The DNB ...

Steven D. Miller; Cynthia L. Combs; Stanley Q. Kidder; Thomas F. Lee

2012-04-01T23:59:59.000Z

138

A question of visibility: a rights-based look at ICT centers for persons with disabilities in Latin America  

Science Conference Proceedings (OSTI)

In this paper, we examine the deployment of a group of technology centers serving people with disabilities in five Latin American countries: Colombia, Ecuador, Guatemala, Mexico, and Venezuela. We explore the impacts of such training courses on the employability, ... Keywords: ICTD, Latin America, disability, visibility

Michele Frix; Joyojeet Pal

2010-12-01T23:59:59.000Z

139

An optimal text/background color combination of LED information boards for visibility improvement based on psychological measurements  

Science Conference Proceedings (OSTI)

In this study, conspicuity and readability of the text on light-emitting diode (LED) information boards were evaluated by psychological experiments, and the influences of color combinations of text / background, luminance, and shadow were evaluated quantitatively. ... Keywords: LED, Scheffe's paired comparison, color combination, visibility

Aya Shiraiwa; Eriko Aiba; Takayuki Shimotomai; Hiroya Inome; Noriko Nagata

2013-03-01T23:59:59.000Z

140

VPN MANUAL Windows 7 Check to ensure OleMiss wireless is visible in the network connections.  

E-Print Network (OSTI)

VPN MANUAL ­ Windows 7 Check to ensure OleMiss wireless is visible in the network connections, click Continue. #12;VPN MANUAL ­ Windows 7 Next, you will be prompted to Launch the Cisco Agent. Click to `Run' the file. #12;VPN MANUAL ­ Windows 7 The Cisco Agent will likely take a few minutes to fully

Tchumper, Gregory S.

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141

Can polarized lighting panels reduce energy consumption and improve visibility in building interiors  

SciTech Connect

The lighting and vision literature, materials on management science and the reflectivity of surfaces are reviewed. The analysis emphasized the connection between lighting design and productivity. It is concluded that polarizing panels should be included among the alternatives normally considered by the lighting designer to utilize energy more efficiently than normal general lighting systems using standard prismatic or diffusing panels. A lighting design using polarizing panels might use 1/4 to 1/3 less energy than a reference system using standard prismatic panels without compromising function. The estimate of the potential energy savings available with polarizing panels is based on the estimate of their efficiency at producing Equivalent Spherical Illumination (ESI). ESI combines the effects of luminance and contrast into a single figure of merit for visibility. A short history and some background of ESI and a discussion of the measured reflectivities of paper and pencil on paper are presented. These data are used in ESI calculations. The problems and limitations of evaluating lighting systems strictly in terms of ESI per watt (or dollar) are discussed. An attempt was made to evaluate polarizing panels in terms of the factors discussed. Additional information is provided in 4 appendices.

Berman, S.; Clear, R.

1979-08-01T23:59:59.000Z

142

A new visible spectroscopy diagnostic for the JET ITER-like wall main chamber  

Science Conference Proceedings (OSTI)

In preparation for ITER, JET has been upgraded with a new ITER-like wall (ILW), whereby the main plasma facing components, previously of carbon, have been replaced by mainly Be in the main chamber and W in the divertor. As part of the many diagnostic enhancements, a new, survey, visible spectroscopy diagnostic has been installed for the characterization of the ILW. An array of eight lines-of-sight (LOS) view radially one of the two JET neutral beam shine through areas (W coated carbon fibre composite tiles) at the inner wall. In addition, one vertical LOS views the solid W tile at the outer divertor. The light emitted from the plasma is coupled to a series of compact overview spectrometers, with overall wavelength range of 380-960 nm and to one high resolution Echelle overview spectrometer covering the wavelength range 365-720 nm. The new survey diagnostic has been absolutely calibrated in situ by means of a radiometric light source placed inside the JET vessel in front of the whole optical path and operated by remote handling. The diagnostic is operated in every JET discharge, routinely monitoring photon fluxes from intrinsic and extrinsic impurities (e.g., Be, C, W, N, and Ne), molecules (e.g., BeD, D{sub 2}, ND) and main chamber and divertor recycling (typically D{alpha}, D{beta}, and D{gamma}). The paper presents a technical description of the diagnostic and first measurements during JET discharges.

Maggi, C. F. [Max-Planck-Institut fuer Plasmaphysik, EURATOM Association, D-85748 Garching (Germany); Brezinsek, S. [Forschungszentrum Juelich GmbH, EURATOM Association, D-52425 Juelich (Germany); Stamp, M. F.; Griph, S.; Heesterman, P.; Hogben, C.; Horton, A.; Meigs, A.; Studholme, W.; Zastrow, K.-D. [EURATOM/CCFE, Fusion Association, Culham Science Centre, Abingdon, OX14 3DB (United Kingdom); Morlock, C. [EFDA-CSU Garching, Boltzmannstrasse 2, 85748 Garching (Germany); Collaboration: JET-EFDA Contributors

2012-10-15T23:59:59.000Z

143

Visible and dark matter in M 31 - II. A dynamical model and dark matter density distribution  

E-Print Network (OSTI)

In the present paper we derive the density distribution of dark matter (DM) in a well-observed nearby disc galaxy, the Andromeda galaxy. From photometrical and chemical evolution models constructed in the first part of the study (Tamm, Tempel & Tenjes 2007 (arXiv:0707.4375), hereafter Paper I) we can calculate the mass distribution of visible components. In the dynamical model we calculate stellar rotation velocities along the major axis and velocity dispersions along the major, minor and intermediate axes of the galaxy. Comparing the calculated values with the collected observational data, we find the amount of DM, which must be added to reach an agreement with the observed rotation and dispersion data. We conclude that within the uncertainties, the DM distributions by Moore, Burkert, isothermal, Navarro, Frenk & White (NFW) and Navarro et al. 2004 (N04) fit with observations. The NFW and N04 density distributions give the best fit with observations. The total mass of M 31 with the NFW DM distributio...

Tempel, Elmo; Tenjes, Peeter

2007-01-01T23:59:59.000Z

144

Skill of a Ceiling and Visibility Local Ensemble Prediction System (LEPS) according to Fog-Type Prediction at Paris-Charles de Gaulle Airport  

Science Conference Proceedings (OSTI)

A specific event, called a low-visibility procedure (LVP), has been defined when visibility is under 600 m and/or the ceiling is under 60 m at Paris-Charles de Gaulle Airport, Paris, France, to ensure air traffic safety and to reduce the economic ...

Stevie Roquelaure; Robert Tardif; Samuel Remy; Thierry Bergot

2009-12-01T23:59:59.000Z

145

Navajo Generating Station and Air Visibility Regulations: Alternatives and Impacts (Revised), Energy Analysis, NREL (National Renewable Energy Laboratory)  

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

Navajo Generating Station Navajo Generating Station Navajo Generating Station and Air Visibility Regulations: Alternatives and Impacts David J. Hurlbut, Scott Haase, Gregory Brinkman, Kip Funk, Rachel Gelman, Eric Lantz, Christina Larney, David Peterson, Christopher Worley National Renewable Energy Laboratory Ed Liebsch HDR Engineering, Inc. Prepared under Task No. WFJ5.1000 Technical Report NREL/TP-6A20-53024 * Revised March 2012 Contract No. DE-AC36-08G028308 Produced under direction of the U.S. Department of the Interior by the National Renewable Energy Laboratory (NREL) under Interagency Agreement R11PG30024 and Task No. WFJ5.1000. ERRATA SHEET NREL REPORT/PROJECT NUMBER: NREL/TP-6A20-53024 DOE NUMBER: N/A TITLE: Navajo Generating Station and Air Visibility Regulations: Alternatives and

146

New Visible to Broadband Shortwave Conversions for Deriving Albedos from GOES-8 Over the ARM-SGP  

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

New Visible to Broadband Shortwave Conversions for New Visible to Broadband Shortwave Conversions for Deriving Albedos from GOES-8 Over the ARM-SGP V. Chakrapani, D. R. Doelling, and M. M. Khaiyer Analytical Services and Materials, Inc. Hampton, Virginia P. Minnis National Aeronautics and Space Administration Langley Research Center Hampton, Virginia Introduction The radiation budget at the top of the atmosphere (TOA) is a quantity of fundamental importance to the Atmospheric Radiation Measurement (ARM) Program. Thus, it is necessary to measure the radiation budget components, broadband shortwave (SW) albedo and outgoing longwave radiation, as accurately as possible. Measurement of TOA broadband albedos over the ARM surface sites has only been possible since the advent of Clouds and the Earth's Radiant Energy System (CERES; Wielicki et al.

147

Final LDRD report : enhanced spontaneous emission rate in visible III-nitride LEDs using 3D photonic crystal cavities.  

Science Conference Proceedings (OSTI)

The fundamental spontaneous emission rate for a photon source can be modified by placing the emitter inside a periodic dielectric structure allowing the emission to be dramatically enhanced or suppressed depending on the intended application. We have investigated the relatively unexplored realm of interaction between semiconductor emitters and three dimensional photonic crystals in the visible spectrum. Although this interaction has been investigated at longer wavelengths, very little work has been done in the visible spectrum. During the course of this LDRD, we have fabricated TiO{sub 2} logpile photonic crystal structures with the shortest wavelength band gap ever demonstrated. A variety of different emitters with emission between 365 nm and 700 nm were incorporated into photonic crystal structures. Time-integrated and time-resolved photoluminescence measurements were performed to measure changes to the spontaneous emission rate. Both enhanced and suppressed emission were demonstrated and attributed to changes to the photonic density of states.

Fischer, Arthur Joseph; Subramania, Ganapathi S.; Coley, Anthony J.; Lee, Yun-Ju; Li, Qiming; Wang, George T.; Luk, Ting Shan; Koleske, Daniel David; Fullmer, Kristine Wanta

2009-09-01T23:59:59.000Z

148

Preparation, characterization of the Ta-doped ZnO nanoparticles and their photocatalytic activity under visible-light illumination  

SciTech Connect

This paper describes a novel catalyst of the Ta-doped ZnO nanocrystals prepared by a modified polymerizable complex method using the water-soluble tantalum precursor as the sources of Ta. The catalysts were characterized by means of various analytical techniques as a function of Ta content (x=0-4 mol%) systematically. A remarkable advantage of the results was confirmed that dopant Ta enhanced the visible-light absorption of ZnO and the low-solubility tantalum doping could restrain the growth of crystal and minish the particle size. The relationship between the physicochemical property and the photocatalytic performance was discussed, and it was found that the photocatalytic activity in the photochemical degradation of methylene blue under visible-light irradiation (lambda>=420 nm) was dependent on the contents of the dopant, which could affect the particle size, concentration of surface hydroxyl groups and active hydrogen-related defect sites, and the visible-light absorption. The highest photocatalytic activity was obtained for the 1.0 mol% Ta-doped ZnO sample. - Graphical abstract: The addition of the tantalum into ZnO prepared by a modified polymerizable complex method not only restrains the growth of crystal, minish the particle size, but also changes the nanocrystal morphology.

Kong Jizhou [National Laboratory of Solid State Microstructures, Materials Science and Engineering Department, Nanjing University, Nanjing 210093 (China); Li Aidong, E-mail: adli@nju.edu.c [National Laboratory of Solid State Microstructures, Materials Science and Engineering Department, Nanjing University, Nanjing 210093 (China); Zhai Haifa; Gong Youpin; Li Hui; Wu Di [National Laboratory of Solid State Microstructures, Materials Science and Engineering Department, Nanjing University, Nanjing 210093 (China)

2009-08-15T23:59:59.000Z

149

SPECTRAL IRRADIANCE CALIBRATION IN THE INFRARED. XVII. ZERO-MAGNITUDE BROADBAND FLUX REFERENCE FOR VISIBLE-TO-INFRARED PHOTOMETRY  

Science Conference Proceedings (OSTI)

The absolutely calibrated infrared (IR) stellar spectra of standard stars described by Engelke et al. are being extended into the visible and will span a continuous wavelength range from {approx}0.35 {mu}m to 35.0 {mu}m. This paper, which is a continuation of the series on calibration initiated with Cohen et al., presents the foundation of this extension. We find that due to various irregularities Vega ({alpha} Lyr) is not suitable for its traditional role as the primary visible or near-infrared standard star. We therefore define a new zero-point flux that is independent of Vega and, as far as is feasible, uses measured spectral energy distributions (SEDs) and fluxes derived from photometry. The calibrated primary stars now underpinning this zero-point definition are 109 Vir in the visible and Sirius ({alpha} CMa) in the infrared. The resulting zero-point SED tests well against solar analog data presented by Rieke et al. while also maintaining an unambiguous link to specific calibration stars, thus providing a pragmatic range of options for any researcher wishing to tie it to a given set of photometry.

Engelke, Charles W. [Institute for Scientific Research, Boston College, 140 Commonwealth Avenue, Chestnut Hill, MA 02135 (United States); Price, Stephan D.; Kraemer, Kathleen E. [Space Vehicle Directorate, Air Force Research Laboratory, 29 Randolph Road, Hanscom AFB, MA 01731 (United States)

2010-12-15T23:59:59.000Z

150

ORNL IntelligentFreight Initiative:Enhanced End-to-End Supply Chain Visibility of Security Sensitive Hazardous Materials  

SciTech Connect

In the post September 11, 2001 (9/11) world the federal government has increased its focus on the manufacturing, distributing, warehousing, and transporting of hazardous materials. In 2002, Congress mandated that the Transportation Security Agency (TSA) designate a subset of hazardous materials that could pose a threat to the American public when transported in sufficiently large quantities. This subset of hazardous materials, which could be weaponized or subjected to a nefarious terrorist act, was designated as Security Sensitive Hazardous Materials (SSHM). Radioactive materials (RAM) were of special concern because actionable intelligence had revealed that Al Qaeda desired to develop a homemade nuclear device or a dirty bomb to use against the United States (US) or its allies.1 Because of this clear and present danger, it is today a national priority to develop and deploy technologies that will provide for visibility and real-time exception notification of SSHM and Radioactive Materials in Quantities of Concern (RAMQC) in international commerce. Over the past eight years Oak Ridge National Laboratory (ORNL) has been developing, implementing, and deploying sensor-based technologies to enhance supply chain visibility. ORNL s research into creating a model for shipments, known as IntelligentFreight, has investigated sensors and sensor integration methods at numerous testbeds throughout the national supply chain. As a result of our research, ORNL believes that most of the information needed by supply chain partners to provide shipment visibility and exceptions-based reporting already exists but is trapped in numerous proprietary or agency-centric databases.

Walker, Randy M [ORNL; Shankar, Mallikarjun [ORNL; Gorman, Bryan L [ORNL

2009-01-01T23:59:59.000Z

151

Using Visible and Near Infrared Diffuse Reflectance Spectroscopy to Characterize and Classify Soil Profiles  

E-Print Network (OSTI)

Visible and near infrared diffuse reflectance spectroscopy (VisNIR-DRS) is a method being investigated for quantifying soil properties and mapping soil profiles. Because a VisNIR-DRS system mounted in a soil penetrometer is now commercially available for scanning soil profiles in situ, methodologies for using scans to map soils and quantify soil properties are needed. The overall goal of this research is to investigate methodologies for collecting and analyzing VisNIR-DRS scans of intact soil profiles to identify soil series. Methodologies tested include scanning at variable versus uniform moistures, using individual versus averaged spectra, boosting an intact spectral library with local samples, and comparing quantitative and categorical classifications of soil series. Thirty-two soil cores from two fields, representing three soil series, were extracted and scanned every 2.5 cm from the soil surface to 1.5 m or to the depth of parent material at variable field moist conditions and at uniform moist condition. Laboratory analyses for clay, sand, and silt were performed on each horizon. Soil series were classified using partial least squares regression (PLS) and linear discriminant analysis (LDA). A Central Texas intact spectral library (n=70 intact cores) was used for PLS modeling, alone and boosted with the two fields. Because whole-field independent validation was used, relative percent difference (RPD) values were used to compare model performance. Wetting soils to uniform moisture prior to scanning improved prediction accuracy of total clay and RPD improved by 53 percent. Averaging side-by-side scans of the same soil profile improved prediction accuracy of RPD by 10 percent. When creating calibration models, boosting a library with local samples improved prediction accuracy of clay content by 80 and 34 percent for the two fields. Principal component plots provided insight on the spectral similarities between these datasets. Overall, using PLS alone performed the same as LDA at predicting soil series. Most importantly, results of this project reiterate the importance of fully-independent calibration and validation for assessing the true potential of VisNIR-DRS. Using VisNIR-DRS is an effective way for in situ characterization and classification of soil properties.

Wilke, Katrina Margarette

2010-08-01T23:59:59.000Z

152

A Land and Ocean Microwave Cloud Classification Algorithm Derived from AMSU-A and -B, Trained Using MSG-SEVIRI Infrared and Visible Observations  

Science Conference Proceedings (OSTI)

A statistical cloud classification and cloud mask algorithm is developed based on Advanced Microwave Sounding Unit (AMSU-A and -B) microwave (MW) observations. The visible and infrared data from the Meteosat Third Generation-Spinning Enhanced ...

Filipe Aires; Francis Marquisseau; Catherine Prigent; Genevičve Sčze

2011-08-01T23:59:59.000Z

153

Practical Atmospheric Correction Algorithms for a Multi-Spectral Sensor From the Visible Through the Thermal Spectral Regions  

Science Conference Proceedings (OSTI)

Deriving information about the Earth's surface requires atmospheric corrections of the measured top-of-the-atmosphere radiances. One possible path is to use atmospheric radiative transfer codes to predict how the radiance leaving the ground is affected by the scattering and attenuation. In practice the atmosphere is usually not well known and thus it is necessary to use more practical methods. The authors will describe how to find dark surfaces, estimate the atmospheric optical depth, estimate path radiance and identify thick clouds using thresholds on reflectance and NDVI and columnar water vapor. The authors describe a simple method to correct a visible channel contaminated by a thin cirrus clouds.

Borel, C.C.; Villeneuve, P.V.; Clodium, W.B.; Szymenski, J.J.; Davis, A.B.

1999-04-04T23:59:59.000Z

154

Performance of MEMS-based visible-light adaptive optics at Lick Observatory: Closed- and open-loop control  

E-Print Network (OSTI)

At the University of California's Lick Observatory, we have implemented an on-sky testbed for next-generation adaptive optics (AO) technologies. The Visible-Light Laser Guidestar Experiments instrument (ViLLaGEs) includes visible-light AO, a micro-electro-mechanical-systems (MEMS) deformable mirror, and open-loop control of said MEMS on the 1-meter Nickel telescope at Mt. Hamilton. In this paper we evaluate the performance of ViLLaGEs in open- and closed-loop control, finding that both control methods give equivalent Strehl ratios of up to ~ 7% in I-band and similar rejection of temporal power. Therefore, we find that open-loop control of MEMS on-sky is as effective as closed-loop control. Furthermore, after operating the system for three years, we find MEMS technology to function well in the observatory environment. We construct an error budget for the system, accounting for 130 nm of wavefront error out of 190 nm error in the science-camera PSFs. We find that the dominant known term is internal static error...

Morzinski, Katie; Gavel, Donald T; Grigsby, Bryant; Dillon, Daren; Reinig, Marc; Macintosh, Bruce A

2010-01-01T23:59:59.000Z

155

An Atmospheric Radiation Measurement Value-Added Product to Retrieve Optically Thin Cloud Visible Optical Depth using Micropulse Lidar  

Science Conference Proceedings (OSTI)

The purpose of the Micropulse Lidar (MPL) Cloud Optical Depth (MPLCOD) Value-Added Product (VAP) is to retrieve the visible (short-wave) cloud optical depth for optically thin clouds using MPL. The advantage of using the MPL to derive optical depth is that lidar is able to detect optically thin cloud layers that may not be detected by millimeter cloud radar or radiometric techniques. The disadvantage of using lidar to derive optical depth is that the lidar signal becomes attenuation limited when ? approaches 3 (this value can vary depending on instrument specifications). As a result, the lidar will not detect optically thin clouds if an optically thick cloud obstructs the lidar beam.

Lo, C; Comstock, JM; Flynn, C

2006-10-01T23:59:59.000Z

156

Enhanced performance of dye-sensitized solar cells based on TiO{sub 2} with NIR-absorption and visible upconversion luminescence  

SciTech Connect

TiO{sub 2} with NIR-absorption and visible upconversion luminescence (UC-TiO{sub 2}) is prepared by a sol-gel method and calcined at 700 Degree-Sign C for 6 h. The material broadens the response region of dye sensitized solar cells (DSSCs) from an ultraviolet-visible region to the whole region of the solar spectrum. It shifts NIR sunlight to visible light which matches the strong absorbing region of the dye (N719). DSSCs based on UC-TiO{sub 2} achieved higher conversion efficiency than that on raw TiO{sub 2}. UC-TiO{sub 2} was mixed with commercial raw TiO{sub 2} as additive, and the short-circuit current density, open-circuit voltage and conversion efficiency of the DSSC reached to the optimum values 13.38 mA/cm{sup 2}, 0.78 V and 6.63% (AM1.5 global), comparing with the blank values: 7.99 mA/cm{sup 2}, 0.75 V and 4.07%, respectively. Also the mechanisms of upconversion by multiphoton absorption and energy transfer processes are interpreted in this paper. - Graphical abstract: By introducing TiO{sub 2} with NIR-absorption and visible up-conversion luminescence into DSSC, a signal reflection was explored from ultra-violet region to visible region, and to near-IR region. Highlights: Black-Right-Pointing-Pointer TiO{sub 2} with NIR-absorption and visible up-conversion luminescence (UC-TiO{sub 2}) was prepared by a sol-gel method. Black-Right-Pointing-Pointer A systematic characterization and analysis was carried out to discuss the mechanism. Black-Right-Pointing-Pointer A significantly enhanced performance of DSSC was explored by using UC-TiO{sub 2} as an additive.

Liang, Li [Department of Chemistry, Harbin Institute of Technology, Harbin 150001 (China)] [Department of Chemistry, Harbin Institute of Technology, Harbin 150001 (China); Yulin, Yang, E-mail: ylyang@hit.edu.cn [Department of Chemistry, Harbin Institute of Technology, Harbin 150001 (China)] [Department of Chemistry, Harbin Institute of Technology, Harbin 150001 (China); Mi, Zhou; Ruiqing, Fan; LeLe, Qiu [Department of Chemistry, Harbin Institute of Technology, Harbin 150001 (China)] [Department of Chemistry, Harbin Institute of Technology, Harbin 150001 (China); Xin, Wang [Department of Chemistry, Harbin Institute of Technology, Harbin 150001 (China) [Department of Chemistry, Harbin Institute of Technology, Harbin 150001 (China); Department of Food and Environmental Engineering, Heilongjiang, East University, Harbin 150086 (China); Lingyun, Zhang [Department of Chemistry, Harbin Institute of Technology, Harbin 150001 (China) [Department of Chemistry, Harbin Institute of Technology, Harbin 150001 (China); School of Chemical Engineering, Northeast Dianli University, Jilin 132012 (China); Xuesong, Zhou; Jianglong, He [Department of Chemistry, Harbin Institute of Technology, Harbin 150001 (China)] [Department of Chemistry, Harbin Institute of Technology, Harbin 150001 (China)

2013-02-15T23:59:59.000Z

157

Method And Apparatus For Examining A Tissue Using The Spectral Wing Emission Therefrom Induced By Visible To Infrared Photoexcitation.  

SciTech Connect

Method and an apparatus for examining a tissue using the spectral wing emission therefrom induced by visible to infrared photoexcitation. In one aspect, the method is used to characterize the condition of a tissue sample and comprises the steps of (a) photoexciting the tissue sample with substantially monochromatic light having a wavelength of at least 600 nm; and (b) using the resultant far red and near infrared spectral wing emission (SW) emitted from the tissue sample to characterize the condition of the tissue sample. In one embodiment, the substantially monochromatic photoexciting light is a continuous beam of light, and the resultant steady-state far red and near infrared SW emission from the tissue sample is used to characterize the condition of the tissue sample. In another embodiment, the substantially monochromatic photoexciting light is a light pulse, and the resultant time-resolved far red and near infrared SW emission emitted from the tissue sample is used to characterize the condition of the tissue sample. In still another embodiment, the substantially monochromatic photoexciting light is a polarized light pulse, and the parallel and perpendicular components of the resultant polarized time-resolved SW emission emitted from the tissue sample are used to characterize the condition of the tissue sample.

Alfano, Robert R. (3777 Independence Ave., Bronx, NY 10463); Demos, Stavros G. (3550 Pacific Ave., Apt. 304, Livermore, CA 94550); Zhang, Gang (3 Rieder Rd., Edison, NJ 08817)

2003-12-16T23:59:59.000Z

158

Fundamental Studies and Development of III-N Visible LEDs for High-Power Solid-State Lighting Applications  

SciTech Connect

The goal of this program is to understand in a fundamental way the impact of strain, defects, polarization, and Stokes loss in relation to unique device structures upon the internal quantum efficiency (IQE) and efficiency droop (ED) of III-nitride (III-N) light-emitting diodes (LEDs) and to employ this understanding in the design and growth of high-efficiency LEDs capable of highly-reliable, high-current, high-power operation. This knowledge will be the basis for our advanced device epitaxial designs that lead to improved device performance. The primary approach we will employ is to exploit new scientific and engineering knowledge generated through the application of a set of unique advanced growth and characterization tools to develop new concepts in strain-, polarization-, and carrier dynamics-engineered and low-defect materials and device designs having reduced dislocations and improved carrier collection followed by efficient photon generation. We studied the effects of crystalline defect, polarizations, hole transport, electron-spillover, electron blocking layer, underlying layer below the multiplequantum- well active region, and developed high-efficiency and efficiency-droop-mitigated blue LEDs with a new LED epitaxial structures. We believe new LEDs developed in this program will make a breakthrough in the development of high-efficiency high-power visible III-N LEDs from violet to green spectral region.

Dupuis, Russell

2012-02-29T23:59:59.000Z

159

APDs as Single-Photon Detectors for Visible and Near-Infrared Wavelenghts down to Hz Rates  

E-Print Network (OSTI)

For the SPECTRAP experiment at GSI, Germany, detectors with Single-Photon counting capability in the visible and near-infrared regime are required. For the wavelength region up to 1100 nm we investigate the performance of 2x2 mm^2 avalanche photo diodes (APDs) of type S0223 manufactured by Radiation Monitoring Devices. To minimize thermal noise, the APDs are cooled to approximately -170 deg. C using liquid nitrogen. By operating the diodes close to the breakdown voltage it is possible to achieve relative gains in excess of 2x10^4. Custom-made low noise preamplifiers are used to read out the devices. The measurements presented in this paper have been obtained at a relative gain of 2.2x10^4. At a discriminator threshold of 6 mV the resulting dark count rate is in the region of 230/s. With these settings the studied APDs are able to detect single photons at 628 nm wavelength with a photo detection efficiency of (67+-7)%. Measurements at 1020 nm wavelength have been performed using the attenuated output of a grating spectrograph with a light bulb as photon source. With this setup the photo detection efficiency at 1020 nm has been determined to be (13+-3)%, again at a threshold of 6 mV.

R. Jöhren; R. Berendes; W. Buglak; D. Hampf; V. Hannen; J. Mader; W. Nörtershäuser; R. Sánchez; C. Weinheimer

2011-11-29T23:59:59.000Z

160

Highly uniform and reproducible visible to near-infrared vertical-cavity surface-emitting lasers grown by MOVPE  

SciTech Connect

The authors present the growth and characterization of vertical-cavity surface emitting lasers (VCSELs) from visible to near-infrared wavelength grown by metalorganic vapor phase epitaxy. Discussions on the growth issue of VCSEL materials include the control on growth rate and composition using an in situ normal-incidence reflectometer, optimization of ultra-high material uniformity, and comprehensive p- and n-type doping study in AlGaAs by CCl{sub 4} and Si{sub 2}H{sub 6} over the entire Al composition range. They will also demonstrate the recent achievements of selectively-oxidized VCSELs which include the first room-temperature continuous-wave demonstration of all-AlGaAs 700-nm red VCSELs, high-performance n-side up 850-nm VCSELs, and low threshold current and low-threshold voltage 1.06 {micro}m VCSELs using InGaAs/GaAsP strain-compensated quantum wells.

Hou, H.Q.; Choquette, K.D.; Hammons, B.E.; Breiland, W.G.; Crawford, M.H.; Lear, K.L. [Sandia National Labs., Albuquerque, NM (United States). Center for Compound Semiconductors Technology

1997-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "visible piping visible" 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

Visible Light Absorption of Binuclear TiOCoII Charge-Transfer UnitAssembled in Mesoporous Silica  

SciTech Connect

Grafting of CoII(NCCH3)2Cl2 onto mesoporous Ti-MCM-41 silicain acetonitrile solution affords binuclear Ti-O-CoII sites on the poresurface under complete replacement of the precursor ligands byinteractions with anchored Ti centers and the silica surface. The CoIIligand field spectrum signals that the Co centers are anchored on thepore surface in tetrahedral coordination. FT-infrared action spectroscopyusing ammonia gas adsorption reveals Co-O-Si bond modes at 831 and 762cm-1. No Co oxide clusters are observed in the as-synthesized material.The bimetallic moieties feature an absorption extending from the UV intothe visible to about 600 nm which is attributed to the TiIV-O-CoII?3TiIII-O-CoIII metal-to-metal charge-transfer (MMCT) transition. Thechromophore is absent in MCM-41 containing Ti and Co centers isolatedfrom each other; this material was synthesized by grafting CoII onto aTi-MCM-41 sample with the Ti centers protected by a cyclopentadienylligand. The result indicates that the appearance of the charge-transferabsorption requires that the metal centers are linked by an oxo bridge,which is additionally supported by XANES spectroscopy. The MMCTchromophore of Ti-O-CoII units has sufficient oxidation power to serve asvisible light electron pump for driving multi-electron transfer catalystsof demanding uphill reactions such as water oxidation.

Han, Hongxian; Frei, Heinz

2007-01-30T23:59:59.000Z

162

ETA CARINAE ACROSS THE 2003.5 MINIMUM: ANALYSIS IN THE VISIBLE AND NEAR-INFRARED SPECTRAL REGION  

Science Conference Proceedings (OSTI)

We present an analysis of the visible through near-infrared spectrum of Eta Carinae ({eta} Car) and its ejecta obtained during the '{eta} Car Campaign with the Ultraviolet and Visual Echelle Spectrograph (UVES) at the ESO Very Large Telescope (VLT)'. This is a part of larger effort to present a complete {eta} Car spectrum, and extends the previously presented analyses with the Hubble Space Telescope/Space Telescope Imaging Spectrograph (HST/STIS) in the UV (1240-3159 A) to 10,430 A. The spectrum in the mid- and near-UV is characterized by the ejecta absorption. At longer wavelengths, stellar wind features from the central source and narrow-emission lines from the Weigelt condensations dominate the spectrum. However, narrow absorption lines from the circumstellar shells are present. This paper provides a description of the spectrum between 3060 and 10,430 A, including line identifications of the ejecta absorption spectrum, the emission spectrum from the Weigelt condensations and the P Cygni stellar wind features. The high spectral resolving power of VLT/UVES enables equivalent width measurements of atomic and molecular absorption lines for elements with no transitions at the shorter wavelengths. However, the ground-based seeing and contributions of nebular-scattered radiation prevent direct comparison of measured equivalent widths in the VLT/UVES and HST/STIS spectra. Fortunately, HST/STIS and VLT/UVES have a small overlap in wavelength coverage which allows us to compare and adjust for the difference in scattered radiation entering the instruments' apertures. This paper provides a complete online VLT/UVES spectrum with line identifications and a spectral comparison between HST/STIS and VLT/UVES between 3060 and 3160 A.

Nielsen, K. E.; Kober, G. Vieira [Catholic University of America, Washington, DC 20064 (United States); Weis, K.; Bomans, D. J. [Astronomisches Institut, Ruhr-Universitaet Bochum, Universitaetsstrasse 150, D-44780 Bochum (Germany); Gull, T. R. [Astrophysics Science Division, Code 667, Goddard Space Flight Center, Greenbelt, MD 20771 (United States); Stahl, O. [ZAH, Landessternwarte Heidelberg-Koenigstuhl, D-69117 Heidelberg (Germany)], E-mail: krister.nielsen@nasa.gov

2009-04-15T23:59:59.000Z

163

Combining visibilities from the Giant Meterwave Radio Telescope and the Nancay Radio Heliograph: High dynamic range snapshot images of the solar corona at 327 MHz  

E-Print Network (OSTI)

We report first results from an ongoing program of combining visibilities from the Giant Meterwave Radio Telescope (GMRT) and the Nancay Radio Heliograph (NRH) to produce composite snapshot images of the sun at meter wavelengths. We describe the data processing, including a specific multi-scale CLEAN algorithm. We present results of a) simulations for two models of the sun at 327 MHz, with differing complexity b) observations of a complex noise storm on the sun at 327 MHz on Aug 27 2002. Our results illustrate the capacity of this method to produce high dynamic range snapshot images when the solar corona has structures with scales ranging from the image resolution of 49" to the size of the whole sun. We find that we cannot obtain reliable snapshot images for complex objects when the visibilities are sparsely sampled.

Claude Mercier; Prasad Subramanian; Alain Kerdraon; Monique Pick; S. Ananthakrishnan; P. Janardhan

2005-08-31T23:59:59.000Z

164

Southeastern Aerosol and Visibility Study (SEAVS): Concentration and Composition of Atmospheric Aerosols at Look Rock, Tennessee, Ju ly-August 1995  

Science Conference Proceedings (OSTI)

Fine airborne particles with diameters below about 2.5 mm (PM-2.5), contribute to inhalation exposure, deposit on lakes and vegetation, form hazes, and influence the earth's radiative balance. This report describes the results of the Southeastern Aerosol and Visibility Study (SEAVS), which characterizes the concentration and chemical composition of fine particulate matter measured in the Great Smoky Mountains National Park during July-August, 1995. These results provide new insights into the influence of...

1998-12-16T23:59:59.000Z

165

Preparation and photocatalytic activity of high-efficiency visible-light-responsive photocatalyst SnS{sub x}/TiO{sub 2}  

Science Conference Proceedings (OSTI)

Visible-light-responsive composite photocatalysts SnS{sub 2}/TiO{sub 2} and SnS/TiO{sub 2} with different mass ratios were prepared by in-situ synthesis technology in solution with commercial TiO{sub 2}. The junction-based materials SnS{sub x} (x=1, 2)/TiO{sub 2} were found to have high visible-light photocatalytic performance and possess much better activity than the single-phase SnS{sub x} or TiO{sub 2}. The greatly enhanced photocatalytic activity of the SnS{sub x}/TiO{sub 2} composites was mainly attributed to the matching band potentials and efficient charge transfer and separation at the tight-bonding interface between SnS{sub x} and TiO{sub 2}. The fact was confirmed by the comparison of photocatalytic activities of the SnS{sub 2}/TiO{sub 2} samples prepared by physical mixing method and in-situ synthesis technique. - Graphical Abstract: Visible-light-responsive composite photocatalysts SnS{sub 2}/TiO{sub 2} and SnS/TiO{sub 2} with different mass ratios were prepared by in-situ synthesis technology in solution with commercial TiO{sub 2}. The photocatalysts SnS{sub x} (x=1, 2) and SnS{sub x}/TiO{sub 2} possess excellent photocatalytic activities. The greatly enhanced photocatalytic activity of the SnS{sub x}/TiO{sub 2} composites was mainly attributed to the matching band potentials and efficient charge transfer and separation at the tight-bonding interface between SnS{sub x} and TiO{sub 2}.

Yang Chongyin; Wang Wendeng; Shan Zhichao [State Key Laboratory of High Performance Ceramics and Superfine Microstructures, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050 (China); Huang Fuqiang, E-mail: huangfq@mail.sic.ac.c [State Key Laboratory of High Performance Ceramics and Superfine Microstructures, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050 (China)

2009-04-15T23:59:59.000Z

166

Large-scale controllable synthesis of dumbbell-like BiVO{sub 4} photocatalysts with enhanced visible-light photocatalytic activity  

SciTech Connect

The controllable synthesis of novel dumbbell-like BiVO{sub 4} hierarchical nanostructures has been successfully obtained via a simple hydrothermal route. The as-synthesized products were studied by X-ray powder diffraction, scanning electron microscopy, transmission electron microscopy and UV-vis absorption spectroscopy. The results showed that the nucleation and growth of the nanodumbbells were governed by an oriented aggregation growth mechanism. It is noteworthy that the concentration of poly(vinyl pyrrolidone) and the volume ratio of H{sub 2}O to CH{sub 3}COOH were crucial to the growth of the final nanoarchitectures. Control experiments were also carried out to investigate the factors which impact on the morphology of the products. Furthermore, the as-prepared BiVO{sub 4} hierarchical nanostructures demonstrated the superior visible-light-driven photocatalytic efficiency, which is helpful for the separation and recycle considering their promising applications in harmful pollutants disposal. - Graphical Abstract: The controllable synthesis of novel dumbbell-like BiVO{sub 4} hierarchical nanostructures has been successfully obtained via a simple hydrothermal route; the as-prepared BiVO{sub 4} hierarchical nanostructures demonstrated the superior visible-light-driven photocatalytic efficiency. Highlights: Black-Right-Pointing-Pointer Dumbbell-like BiVO{sub 4} structures were synthesized and characterized for the first time. Black-Right-Pointing-Pointer The volume ratios of H{sub 2}O to CH{sub 3}COOH were crucial to the final morphologies. Black-Right-Pointing-Pointer Their photocatalytic activity was up to 90% under visible-light irradiation. Black-Right-Pointing-Pointer Dumbbell-like BiVO{sub 4} structures may utilize the pollutant disposal.

Lu Yang [Department of Physics and Electronic Engineering, Xinyang Normal University, Xinyang 464000 (China); Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190 (China); Luo Yongsong, E-mail: ysluo@mail.ipc.ac.cn [Department of Physics and Electronic Engineering, Xinyang Normal University, Xinyang 464000 (China); Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190 (China); Kong Dezhi; Zhang Deyang; Jia Yonglei; Zhang Xinwei [Department of Physics and Electronic Engineering, Xinyang Normal University, Xinyang 464000 (China)

2012-02-15T23:59:59.000Z

167

A major cogeneration system goes in at JFK International Airport. Low-visibility privatization in a high-impact environment  

Science Conference Proceedings (OSTI)

This article describes the first major privatization effort to be completed at John F. Kennedy International Airport. The airport owner and operator, the Port Authority of New York and New Jersey, decided to seek private sector involvement in a capital-intensive project to expand and upgrade the airport`s heating and air conditioning facilities and construct a new cogeneration plant. Kennedy International Airport Cogeneration (KIAC) Partners, a partnership between Gas Energy Incorporated of New York and Community Energy Alternatives of New Jersey, was selected to develop an energy center to supply electricity and hot and chilled water to meet the airport`s growing energy demand. Construction of a 110 MW cogeneration plant, 7,000 tons of chilled water equipment, and 30,000 feet of hot water delivery piping started immediately. JFK Airport`s critical international position called for this substantial project to be developed almost invisibly; no interruption in heating and air conditioning service and no interference in the airport`s active operations could be tolerated. Commercial operation was achieved in February 1995.

Leibler, J. [Port Authority of New York and New Jersey, New York, NY (United States); Luxton, R. [Kennedy International Airport Cogeneration Partners, Jamaica, NY (United States); Ostberg, P. [CEA Kennedy Operators, Inc., Jamaica, NY (United States)

1998-04-01T23:59:59.000Z

168

Thermo-mechanical analysis of ITER first mirrors and its use for the ITER equatorial visible/infrared wide angle viewing system optical design  

SciTech Connect

ITER first mirrors (FMs), as the first components of most ITER optical diagnostics, will be exposed to high plasma radiation flux and neutron load. To reduce the FMs heating and optical surface deformation induced during ITER operation, the use of relevant materials and cooling system are foreseen. The calculations led on different materials and FMs designs and geometries (100 mm and 200 mm) show that the use of CuCrZr and TZM, and a complex integrated cooling system can limit efficiently the FMs heating and reduce their optical surface deformation under plasma radiation flux and neutron load. These investigations were used to evaluate, for the ITER equatorial port visible/infrared wide angle viewing system, the impact of the FMs properties change during operation on the instrument main optical performances. The results obtained are presented and discussed.

Joanny, M.; Salasca, S.; Dapena, M.; Cantone, B.; Travere, J. M. [CEA, IRFM, F-13108 Saint-Paul-lez-Durance (France); Thellier, C.; Ferme, J. J. [THALES SESO, 13593 Aix-en-Provence Cedex 3 (France); Marot, L. [Department of Physics, University of Basel, 4056 Basel (Switzerland); Buravand, O. [Institut d'Optique Graduate School, 91127 Palaiseau (France); Perrollaz, G. [AMETRA, 13770 Venelles (France); Zeile, C. [INR, KIT, D-76344 Eggenstein-Leopoldshafen (Germany)

2012-10-15T23:59:59.000Z

169

Measurements of the flame emissivity and radiative properties of particulate medium in pulverized-coal-fired boiler furnaces by image processing of visible radiation  

SciTech Connect

Due to the complicated processes for coal particles burning in industrial furnaces, their radiative properties, such as the absorption and scattering coefficients, which are essential to make reliable calculation of radiative transfer in combustion computation, are hard to be given exactly by the existing methods. In this paper, multiple color image detectors were used to capture approximately red, green, and blue monochromatic radiative intensity images in the visible wavelength region, and the flame emissivity and the radiative properties of the particulate media in three pulverized-coal-fired boiler furnaces were got from the flame images. It was shown that as the load increased, the flame emissivity and the radiative properties increased too; these radiative parameters had the largest values near the burner zone, and decreased along the combustion process. Compared with the combustion medium with a low-volatile anthracite coal burning in a 670 t/h boiler, the emissivity and the absorption coefficient of the medium with a high-volatile bituminous coal burning in a 1025 t/h boiler were smaller near the outlet zone, but were larger near the burner zone of the furnace, due to the significant contribution of soot to the radiation. This work will be of practical importance in modeling and calculating the radiative heat transfer in combustion processes, and improving the technology for in situ, multi-dimensional visualization of large-scale combustion processes in coal-fired furnaces of power plants. 18 refs., 10 figs., 8 tabs.

Chun Lou; Huai-Chun Zhou; Peng-Feng Yu; Zhi-Wei Jiang [Huazhong University of Science and Technology, Wuhan (China). State Key Laboratory of Coal Combustion

2007-07-01T23:59:59.000Z

170

Visible and controllable RFID tags  

Science Conference Proceedings (OSTI)

Radio frequency identification (RFID) tags containing privacy-sensitive information are increasingly embedded into personal documents (e.g., passports and driver's licenses). The problem is that people are often unaware of the security and privacy risks ... Keywords: awareness, control, feedback, privacy, rfid, sensors

Nicolai Marquardt; Alex S. Taylor; Nicolas Villar; Saul Greenberg

2010-04-01T23:59:59.000Z

171

Electron and hydrogen atom transfer mechanisms for the photoreduction of o-quinones. Visible light induced photoreactions of. beta. -lapachone with amines, alcohols, and amino alcohols  

DOE Green Energy (OSTI)

{beta}-Lapachone (1), a substituted o-naphthoquinone absorbing into the visible ({lambda}{sub max} = 424 nm in benzene), is cleanly and efficiently reduced to the corresponding semiquinone radical upon photolysis in degassed solutions with alcohols, amines, and {beta}-amino alcohols. The course and products of these photoreactions have been followed by NMR, ESR, fluorescence, and absorption spectroscopy. For all three types of reductant the overall reaction involves 2e{sup {minus}} oxidation of the donor, and the quantum efficiencies show a dependence upon quinone concentration indicative of the role of a second dark reduction of 1 by products of the primary photolysis. For amines and amino alcohols the reaction is initiated by single electron transfer quenching of triplet 1. For triethylamine the mechanism is indicated to be a sequence of two electron transfer-proton transfer steps culminating in two semiquinone radicals and the enamine Et{sub 2}NCH{double bond}CH{sub 2}. For amino alcohols a C-C cleavage concurrent with deprotonation of the alcohol (oxidative photofragmentation) occurs, in competition with reverse electron transfer, following the quenching step. For both amines and amino alcohols, limiting efficiencies of reaction approach 2 (for QH{sup {sm bullet}} formation). In contrast, both 2-propanol and benzyl alcohol are oxidized by excited states of 1 with much lower efficiency. The probable mechanism for photooxidation of the alcohols involves a H atom abstraction quenching of the excited state followed by an electron transfer-proton transfer sequence in which a ground-state 1 is reduced. Lower limiting efficiencies for photoreduction of 1 by the alcohols are attributed to inefficiencies of net H-atom transfer in the quenching step. 54 refs., 3 figs., 9 tabs.

Xiaohong Ci; Whitten, D.G. (Univ. of Rochester, NY (USA)); Silveira da Silva, R.; Nicodem, D. (Universidade Federal do Rio de Janeiro (Brazil))

1989-02-15T23:59:59.000Z

172

Photocatalytic splitting of water under visible-light irradiation over the NiOx-loaded Sm{sub 2}InTaO{sub 7} with 4f-d{sup 10}-d{sup 0} configuration  

SciTech Connect

A new visible-light-response photocatalyst Sm{sub 2}InTaO{sub 7} with 4f-d{sup 10}-d{sup 0} configuration crystallized in a cubic system with the space group Fd3m was synthesized by a solid-state reaction method. NiOx-loaded Sm{sub 2}InTaO{sub 7} showed high photocatalytic activities for H{sub 2} evolution from pure water under visible light irradiation (lambda>400 nm). Changes in the photocatalytic activity with the calcination temperature of Sm{sub 2}InTaO{sub 7} and the amount of NiOx loaded indicated that the combination of highly crystallized Sm{sub 2}InTaO{sub 7} and a high dispersion of NiOx particles led to high photocatalytic activity. The high photocatalytic performance of NiOx-loaded Sm{sub 2}InTaO{sub 7} supported the existing view that the photocatalytic activity correlated with the lattice distortion. Density functional theory calculation indicated that strong dispersion from the hybridized In 5s 5p orbitals at the bottom of the conduction band was responsible for the high activity of photocatalyst Sm{sub 2}InTaO{sub 7}. - Graphical abstract: A new visible-light-response photocatalyst Sm{sub 2}InTaO{sub 7} with 4f-d{sup 10}-d{sup 0} configuration was developed. DFT calculation indicated that strong dispersion from the hybridized In 5s 5p orbitals was responsible for the high photocatalytic activity.

Tang Xinde, E-mail: txd738011@yahoo.c [College of Chemistry and Chemical Engineering, Central South University, Changsha 410083 (China); Ye Hongqi [College of Chemistry and Chemical Engineering, Central South University, Changsha 410083 (China); Liu Hui [College of Chemistry and Chemical Engineering, Central South University, Changsha 410083 (China); State Key Laboratory for Powder Metallurgy, Central South University, Changsha 410083 (China); Ma Chenxia; Zhao Zhi [College of Chemistry and Chemical Engineering, Central South University, Changsha 410083 (China)

2010-01-15T23:59:59.000Z

173

Absolute intensity calibration of flat-field space-resolved extreme ultraviolet spectrometer using radial profiles of visible and extreme ultraviolet bremsstrahlung continuum emitted from high-density plasmas in Large Helical Device  

Science Conference Proceedings (OSTI)

A precise absolute intensity calibration of a flat-field space-resolved extreme ultraviolet (EUV) spectrometer working in wavelength range of 60-400 A is carried out using a new calibration technique based on radial profile measurement of the bremsstrahlung continuum in Large Helical Device. A peaked vertical profile of the EUV bremsstrahlung continuum has been successfully observed in high-density plasmas (n{sub e}{>=} 10{sup 14} cm{sup -3}) with hydrogen ice pellet injection. The absolute calibration can be done by comparing the EUV bremsstrahlung profile with the visible bremsstrahlung profile of which the absolute value has been already calibrated using a standard lamp. The line-integrated profile of measured visible bremsstrahlung continuum is firstly converted into the local emissivity profile by considering a magnetic surface distortion due to the plasma pressure, and the local emissivity profile of EUV bremsstrahlung is secondly calculated by taking into account the electron temperature profile and free-free gaunt factor. The line-integrated profile of the EUV bremsstrahlung continuum is finally calculated from the local emissivity profile in order to compare with measured EUV bremsstrahlung profile. The absolute intensity calibration can be done by comparing measured and calculated EUV bremsstrahlung profiles. The calibration factor is thus obtained as a function of wavelength with excellent accuracy. It is also found in the profile analysis that the grating reflectivity of EUV emissions is constant along the direction perpendicular to the wavelength dispersion. Uncertainties on the calibration factor determined with the present method are discussed including charge-coupled device operation modes.

Dong Chunfeng; Wang Erhui [Department of Fusion Science, Graduate University for Advanced Studies, Toki 509-5292, Gifu (Japan); Morita, Shigeru; Goto, Motoshi [Department of Fusion Science, Graduate University for Advanced Studies, Toki 509-5292, Gifu (Japan); National Institute for Fusion Science, Toki 509-5292, Gifu (Japan)

2011-11-15T23:59:59.000Z

174

Carbon Nanodots as Sensitizers for Visible Upconversion  

Science Conference Proceedings (OSTI)

About this Abstract. Meeting, Materials Science & Technology 2013. Symposium, Optical Nanomaterials for Photonics/Biophotonics. Presentation Title, Carbon ...

175

CONTEXTUAL ROADMAP: Policy Institute Visibility, Presence, Impact  

E-Print Network (OSTI)

. STIP: Program in Science, Technology, and Innovation Policy (joint effort of EI2 and School of Public

Li, Mo

176

Tunable Infrared Absorption and Visible Transparency of ...  

parent conducting oxide (TCO), indium tin oxide (ITO).1 At ... and dye-sensitized solar cells, ... energy-dispersive X-ray spectroscopy ...

177

Probabilistic Visibility Forecasting Using Bayesian Model Averaging  

Science Conference Proceedings (OSTI)

Bayesian model averaging (BMA) is a statistical postprocessing technique that has been used in probabilistic weather forecasting to calibrate forecast ensembles and generate predictive probability density functions (PDFs) for weather quantities. ...

Richard M. Chmielecki; Adrian E. Raftery

2011-05-01T23:59:59.000Z

178

Ceiling and Visibility Forecasts via Neural Networks  

Science Conference Proceedings (OSTI)

Statistical postprocessing of numerical model output can improve forecast quality, especially when model output is combined with surface observations. In this article, the development of nonlinear postprocessors for the prediction of ceiling and ...

Caren Marzban; Stephen Leyton; Brad Colman

2007-06-01T23:59:59.000Z

179

The hydrogenation and dehydrogenation of C{sub 2}-C{sub 4} hydrocarbons on Pt(111) monitored in situ over 13 orders of magnitude in pressure with infrared-visible sum frequency generation  

DOE Green Energy (OSTI)

The hydrogenation and dehydrogenation of ethylene, propylene, and isobutene were monitored in situ during heterogeneous catalysis over Pt(111) between 10{sup -10} Torr and 1000 Torr with infrared-visible sum frequency generation (SFG). SFG is a surface specific vibrational spectroscopy capable of achieving submonolayer sensitivity under reaction conditions in the presence of hundreds of Toff of reactants and products. Olefin dehydrogenation experiments were carried out with SFG under ultra high vacuum (UHV) conditions on the (111) crystal face of platinum Ethylene chemisorbed on Pt(111) below 230 K in the di-{sigma} bonded conformation (Pt-CH{sub 2}CH{sub 2}-Pt). Upon annealing the system to form the dehydrogenation product, ethylidyne (M=CCH{sub 3}), evidence was found for an ethylidene intermediate (M=CHCH{sub 3}) from its characteristic v{sub as}(CH{sub 3}) near 2960 cm{sup -1}. Hydrogenation of ethylene was carried out between 1 Toff and 700 Torr of H{sub 2} while the vibrational spectrum of surface species was monitored with SFG. Simultaneously, gas chromatography was used to obtain the turnover rate for the catalytic reaction, which could be correlated with the adsorbed intermediate concentration to determine the reaction rate per surface intermediate. Di-{sigma} bonded ethylene, {pi}-bonded ethylene, ethyl groups and ethylidyne resided on the surface during reaction. The mechanistic pathway for ethylene hydrogenation involved the stepwise hydrogenation of {pi}-bonded ethylene through an ethyl intermediate to ethane. The hydrogenation of propylene was carried out under the same conditions as ethylene. It was found that propylene hydrogenates from {pi}-bonded propylene through a 2-propyl intermediate to propane on Pt(111). The rate of reaction was approximately 50% slower than that of ethylene hydrogenation. Isobutene, however, was found to hydrogenate almost two order of magnitude slower than propylene on Pt(111).

Cremer, P.S.

1996-05-01T23:59:59.000Z

180

Pipe support  

DOE Patents (OSTI)

A pipe support for high temperature, thin-walled piping runs such as those used in nuclear systems. A section of the pipe to be supported is encircled by a tubular inner member comprised of two walls with an annular space therebetween. Compacted load-bearing thermal insulation is encapsulated within the annular space, and the inner member is clamped to the pipe by a constant clamping force split-ring clamp. The clamp may be connected to pipe hangers which provide desired support for the pipe.

Pollono, Louis P. (Hempfield Township, Hempfield County, PA)

1979-01-01T23:59:59.000Z

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


181

Cropland Field Monitoring: MMV Page 1 Montana Cropland Enrolled Farm Fields Carbon Sequestration Field Sampling, Measurement, Monitoring, and Verification: Application of Visible-Near Infrared Diffuse Reflectance Spectroscopy (VNIR) and Laser-induced Breakdown Spectroscopy (LIBS)  

SciTech Connect

There is growing need for rapid, accurate, and inexpensive methods to measure, and verify soil organic carbon (SOC) change for national greenhouse gas accounting and the development of a soil carbon trading market. Laboratory based soil characterization typically requires significant soil processing, which is time and resource intensive. This severely limits application for large-region soil characterization. Thus, development of rapid and accurate methods for characterizing soils are needed to map soil properties for precision agriculture applications, improve regional and global soil carbon (C) stock and flux estimates and efficiently map sub-surface metal contamination, among others. The greatest gains for efficient soil characterization will come from collecting soil data in situ, thus minimizing soil sample transportation, processing, and lab-based measurement costs. Visible and near-infrared diffuse reflectance spectroscopy (VisNIR) and laser-induced breakdown spectroscopy (LIBS) are two complementary, yet fundamentally different spectroscopic techniques that have the potential to meet this need. These sensors have the potential to be mounted on a soil penetrometer and deployed for rapid soil profile characterization at field and landscape scales. Details of sensor interaction, efficient data management, and appropriate statistical analysis techniques for model calibrations are first needed. In situ or on-the-go VisNIR spectroscopy has been proposed as a rapid and inexpensive tool for intensively mapping soil texture and organic carbon (SOC). While lab-based VisNIR has been established as a viable technique for estimating various soil properties, few experiments have compared the predictive accuracy of on-the-go and lab-based VisNIR. Eight north central Montana wheat fields were intensively interrogated using on-the-go and lab-based VisNIR. Lab-based spectral data consistently provided more accurate predictions than on-the-go data. However, neither in situ nor lab-based spectroscopy yielded even semi-quantitative SOC predictions. There was little SOC variability to explain across the eight fields, and on-the-go VisNIR was not able to capture the subtle SOC variability in these Montana soils. With more variation in soil clay content compared to SOC, both lab and on-the-go VisNIR showed better explanatory power. There are several potential explanations for poor on-the-go predictive accuracy: soil heterogeneity, field moisture, consistent sample presentation, and a difference between the spatial support of on-the-go measurements and soil samples collected for laboratory analyses. Though the current configuration of a commercially available on-the-go VisNIR system allows for rapid field scanning, on-the-go soil processing (i.e. drying, crushing, and sieving) could improve soil carbon predictions. Laser-induced breakdown spectroscopy (LIBS) is an emerging elemental analysis technology with the potential to provide rapid, accurate and precise analysis of soil constituents, such as carbon, in situ across landscapes. The research team evaluated the accuracy of LIBS for measuring soil profile carbon in field-moist, intact soil cores simulating conditions that might be encountered by a probe-mounted LIBS instrument measuring soil profile carbon in situ. Over the course of three experiments, more than120 intact soil cores from eight north central Montana wheat fields and the Washington State University (WSU) Cook Agronomy Farm near Pullman, WA were interrogated with LIBS for rapid total carbon (TC), inorganic carbon (IC), and SOC determination. Partial least squares regression models were derived and independently validated at field- and regional scales. Researchers obtained the best LIBS validation predictions for IC followed by TC and SOC. Laser-induced breakdown spectroscopy is fundamentally an elemental analysis technique, yet LIBS PLS2 models appeared to discriminate IC from TC. Regression coefficients from initial models suggested a reliance upon stoichiometric relationships between carbon (247.8 nm) and other elements

Lee Spangler; Ross Bricklemyer; David Brown

2012-03-15T23:59:59.000Z

182

Cropland Field Monitoring: MMV Page 1 Montana Cropland Enrolled Farm Fields Carbon Sequestration Field Sampling, Measurement, Monitoring, and Verification: Application of Visible-Near Infrared Diffuse Reflectance Spectroscopy (VNIR) and Laser-induced Breakdown Spectroscopy (LIBS)  

Science Conference Proceedings (OSTI)

There is growing need for rapid, accurate, and inexpensive methods to measure, and verify soil organic carbon (SOC) change for national greenhouse gas accounting and the development of a soil carbon trading market. Laboratory based soil characterization typically requires significant soil processing, which is time and resource intensive. This severely limits application for large-region soil characterization. Thus, development of rapid and accurate methods for characterizing soils are needed to map soil properties for precision agriculture applications, improve regional and global soil carbon (C) stock and flux estimates and efficiently map sub-surface metal contamination, among others. The greatest gains for efficient soil characterization will come from collecting soil data in situ, thus minimizing soil sample transportation, processing, and lab-based measurement costs. Visible and near-infrared diffuse reflectance spectroscopy (VisNIR) and laser-induced breakdown spectroscopy (LIBS) are two complementary, yet fundamentally different spectroscopic techniques that have the potential to meet this need. These sensors have the potential to be mounted on a soil penetrometer and deployed for rapid soil profile characterization at field and landscape scales. Details of sensor interaction, efficient data management, and appropriate statistical analysis techniques for model calibrations are first needed. In situ or on-the-go VisNIR spectroscopy has been proposed as a rapid and inexpensive tool for intensively mapping soil texture and organic carbon (SOC). While lab-based VisNIR has been established as a viable technique for estimating various soil properties, few experiments have compared the predictive accuracy of on-the-go and lab-based VisNIR. Eight north central Montana wheat fields were intensively interrogated using on-the-go and lab-based VisNIR. Lab-based spectral data consistently provided more accurate predictions than on-the-go data. However, neither in situ nor lab-based spectroscopy yielded even semi-quantitative SOC predictions. There was little SOC variability to explain across the eight fields, and on-the-go VisNIR was not able to capture the subtle SOC variability in these Montana soils. With more variation in soil clay content compared to SOC, both lab and on-the-go VisNIR showed better explanatory power. There are several potential explanations for poor on-the-go predictive accuracy: soil heterogeneity, field moisture, consistent sample presentation, and a difference between the spatial support of on-the-go measurements and soil samples collected for laboratory analyses. Though the current configuration of a commercially available on-the-go VisNIR system allows for rapid field scanning, on-the-go soil processing (i.e. drying, crushing, and sieving) could improve soil carbon predictions. Laser-induced breakdown spectroscopy (LIBS) is an emerging elemental analysis technology with the potential to provide rapid, accurate and precise analysis of soil constituents, such as carbon, in situ across landscapes. The research team evaluated the accuracy of LIBS for measuring soil profile carbon in field-moist, intact soil cores simulating conditions that might be encountered by a probe-mounted LIBS instrument measuring soil profile carbon in situ. Over the course of three experiments, more than120 intact soil cores from eight north central Montana wheat fields and the Washington State University (WSU) Cook Agronomy Farm near Pullman, WA were interrogated with LIBS for rapid total carbon (TC), inorganic carbon (IC), and SOC determination. Partial least squares regression models were derived and independently validated at field- and regional scales. Researchers obtained the best LIBS validation predictions for IC followed by TC and SOC. Laser-induced breakdown spectroscopy is fundamentally an elemental analysis technique, yet LIBS PLS2 models appeared to discriminate IC from TC. Regression coefficients from initial models suggested a reliance upon stoichiometric relationships between carbon (247.8 nm) and other elements

Lee Spangler; Ross Bricklemyer; David Brown

2012-03-15T23:59:59.000Z

183

Pipe connector  

DOE Patents (OSTI)

A safety test facility for testing sodium-cooled nuclear reactor components includes a reactor vessel and a heat exchanger submerged in sodium in the tank. The reactor vessel and heat exchanger are connected by an expansion/deflection pipe coupling comprising a pair of coaxially and slidably engaged tubular elements having radially enlarged opposed end portions of which at least a part is of spherical contour adapted to engage conical sockets in the ends of pipes leading out of the reactor vessel and in to the heat exchanger. A spring surrounding the pipe coupling urges the end portions apart and into engagement with the spherical sockets. Since the pipe coupling is submerged in liquid a limited amount of leakage of sodium from the pipe can be tolerated.

Sullivan, Thomas E. (Evergreen Park, IL); Pardini, John A. (Brookfield, IL)

1978-01-01T23:59:59.000Z

184

Insoluble coatings for Stirling engine heat pipe condenser surfaces. Final report  

Science Conference Proceedings (OSTI)

The work done by Thermacore, Inc., Lancaster, Pennsylvania, for the Phase 1, 1992 SBIR National Aeronautics and Space Administration Contract, Insoluble Coatings for Stirling Engine Heat Pipe Condenser Surfaces' is described. The work was performed between January 1992 and July 1992. Stirling heat engines are being developed for electrical power generation use on manned and unmanned earth orbital and planetary missions. Dish Stirling solar systems and nuclear reactor Stirling systems are two of the most promising applications of the Stirling engine electrical power generation technology. The sources of thermal energy used to drive the Stirling engine typically are non-uniform in temperature and heat flux. Liquid metal heat pipe receivers are used as thermal transformers and isothermalizers to deliver the thermal energy at a uniform high temperature to the heat input section of the Stirling engine. The use of a heat pipe receiver greatly enhances system efficiency and potential life span. One issue that is raised during the design phase of heat pipe receivers is the potential solubility corrosion of the Stirling engine heat input section by the liquid metal working fluid. This Phase 1 effort initiated a program to evaluate and demonstrate coatings, applied to nickel based Stirling engine heater head materials, that are practically 'insoluble' in sodium, potassium, and NaK. This program initiated a study of nickel aluminide as a coating and developed and demonstrated a heat pipe test vehicle that can be used to test candidate materials and coatings. Nickel 200 and nickel aluminide coated Nickel 200 were tested for 1000 hours at 800 C at a condensation heat flux of 25 W/sq cm. Subsequent analyses of the samples showed no visible sign of solubility corrosion of either coated or uncoated samples. The analysis technique, photomicrographs at 200X, has a resolution of better than 2.5 microns (.0001 in).

Dussinger, P.M.

1993-09-01T23:59:59.000Z

185

Novel heat pipe combination  

SciTech Connect

The basic heat pipe principle is employed in a heat pipe combination wherein two heat pipes are combined in opposing relationship to form an integral unit; such that the temperature, heat flow, thermal characteristics, and temperature-related parameters of a monitored environment or object exposed to one end of the heat pipe combination can be measured and controlled by controlling the heat flow of the opposite end of the heat pipe combination.

Arcella, F.G.

1978-01-10T23:59:59.000Z

186

Triply redundant integrated navigation and asset visibility system  

SciTech Connect

Methods and apparatus are described for a navigation system. A method includes providing a global positioning system fix having a plurality of tracking parameters; providing a theater positioning system fix; monitoring the plurality of tracking parameters for predetermined conditions; and, when the predetermined conditions are met, sending a notifying signal and switching to the theater positioning system fix as a primary fix. An apparatus includes a system controller; a global positioning system receiver coupled to the system controller; a radio frequency locating receiver coupled to the system controller; and an operator interface coupled to the system controller.

Smith, Stephen F. (Loudon, TN); Moore, James A. (Powell, TN)

2011-11-29T23:59:59.000Z

187

Triply Redundant Integrated Navigation and Asset Visibility System  

A quartz time, positioning, and navigation array that solves a fundamentalsensitivity problem is under development by ORNL researchers. Existing systemswith good timing stability are limited by poor motion sensitivities. In contrast, thisinvention has ...

188

Observation of visible luminescence from indium nitride at room temperature  

SciTech Connect

InN films were grown on sapphire substrates with AlN buffer layers by reactive sputtering. C-axis-oriented crystalline InN films with a wurtzite structure were confirmed by x-ray diffraction and Raman scattering. Strong photoluminescence (PL) at 1.87 eV, together with a clear absorption edge at 1.97 eV, was observed at room temperature, which clearly demonstrates that it is not accurate in the previous assignment of an {approx}0.7 eV fundamental band gap for intrinsic InN simply from PL and absorption data. The possible origin of the present large band gap was discussed in terms of the effects of oxygen and the Burstein-Moss shift.

Guo, Q.X.; Tanaka, T.; Nishio, M.; Ogawa, H.; Pu, X.D.; Shen, W.Z. [Department of Electrical and Electronic Engineering, Saga University, Saga 840-8502 (Japan); Laboratory of Condensed Matter Spectroscopy and Opto-Electronic Physics, Department of Physics, Shanghai Jiao Tong University, 1954 Hua Shan Road, Shanghai 200030 (China)

2005-06-06T23:59:59.000Z

189

Physical Layer Characteristics and Techniques for Visible Light Communications  

E-Print Network (OSTI)

as tra?c lights, street lights, and automobile headlights orarea where numerous street lights and advertising boardslighting purposes (e.g. , street light, decoration light,

Cui, Kaiyun

2012-01-01T23:59:59.000Z

190

Enforcing RFID data visibility restrictions using XACML security policies  

E-Print Network (OSTI)

Radio Frequency Identification (RFID) technology allows automatic data capture from tagged objects moving in a supply chain. This data can be very useful if it is used to answer traceability queries, however it is distributed ...

Pardal, Miguel L.

191

Air Pollution Control Regulations: No. 1 - Visible Emissions...  

Open Energy Info (EERE)

Yes Implementing Sector StateProvince Program Administrator Rhode Island Department of Environmental Management Primary Website http:www.dem.ri.govpubsregsregsair...

192

Analyzing websites for user-visible security design flaws  

Science Conference Proceedings (OSTI)

An increasing number of people rely on secure websites to carry out their daily business. A survey conducted by Pew Internet states 42% of all internet users bank online. Considering the types of secure transactions being conducted, businesses are rigorously ...

Laura Falk; Atul Prakash; Kevin Borders

2008-07-01T23:59:59.000Z

193

A Spectral Aging Model for the Meteosat-7 Visible Band  

Science Conference Proceedings (OSTI)

For more than 30 years, the Meteosat satellites have been in a geostationary orbit around the earth. Because of the high temporal frequency of the data and the long time period, this database is an excellent candidate for fundamental climate data ...

I. Decoster; N. Clerbaux; E. Baudrez; S. Dewitte; A. Ipe; S. Nevens; A. Velazquez Blazquez; J. Cornelis

2013-03-01T23:59:59.000Z

194

Air Pollution Control Regulations: No. 1- Visible Emissions (Rhode Island)  

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

The regulations state that no person shall emit into the atmosphere from any source any air contaminant for a period or periods aggregating more than three minutes in any one hour which is greater...

195

Metal oxides for efficient infrared to visible upconversion  

E-Print Network (OSTI)

, Guillaume, Anastasia, Marc, Alex, Lea, H eng, Hannoh , Bouh , Erik, etc) and in Cambridge (Marijn, Sri, Milos, Albert, Trudy, Anastasia, Pete, Steve, Arnaud, Tom, Geoff, BJ, Rob, Rose, Amr, Aurélie, Laure , Mohammad, Luke, etc). Thank s to my French... , A. Cassanho and H. Jenssen , J. Display Technol. , 2006, 2 , 68. 10 C. Strümpel , M. McCann, G. Beaucarne , V . Arkhipov, A. Slaoui, V. Svrcek, C. del Cańizo and I. Tobias, Sol . Energy Mater . Sol . Cells , 2007, 91 , 238. 11 T. Trupke...

Etchart, Isabelle

2010-10-12T23:59:59.000Z

196

the Visible and the Invisible Summa anthropologia philosophicae  

E-Print Network (OSTI)

-Noukari, Arab International University, Damascus, Syria & Wael Al-Hussan, The Arab Academy for Banking and Financial Sciences,Damascus, Syria, "Using Data Mining Techniques for Predicting Future Car market Demand of Road Traffic Accidents Using Adaptive Regression Trees", In Proc. Of I. J. On Simulation, Vol. 6, No

Walicki, Michal

197

Physical Layer Characteristics and Techniques for Visible Light Communications  

E-Print Network (OSTI)

di?erent background solar radiation levels. . . 130 xii ListBackground solar radiation characterization . . . . . . . .erent background solar radiation levels. . . . . . . . . .

Cui, Kaiyun

2012-01-01T23:59:59.000Z

198

Study on Visible Light Photocatalytic Performance of Nano Tungsten ...  

Science Conference Proceedings (OSTI)

... is a new environment for energy technology, it has low energy consumption, ... Tungsten trioxide thin films are widely used in electrochromic, solar energy ... of Rolled AZ31 Magnesium under Quasi-Static and High Rate Loading .... Step-

199

Emission of Visible Light by Hot Dense Metals  

E-Print Network (OSTI)

is a form of heat conduction, described by Fourier's law, qnot equal, there is a net heat conduction from hot to cold.to the normal electron heat conduction, but it is a powerful

More, R.M.

2010-01-01T23:59:59.000Z

200

Creating visibility: understanding the design space for food waste  

Science Conference Proceedings (OSTI)

Support for ecological sustainability is of growing interest and the over-consumption, production and disposal of foods are a major concern for sustainability, ethics and the economy. However, there is a deficit in current understandings of how technologies ... Keywords: food waste, human food interaction, in-home tour, mobile diary, qualitative study, sustainability

Eva Ganglbauer; Geraldine Fitzpatrick; Georg Molzer

2012-12-01T23:59:59.000Z

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


201

Visible Structures in Number Theory Peter Borwein and ... - CECM  

E-Print Network (OSTI)

curves; each curve would have to be drawn by its points, and determining a ... covery, informal communication and demonstration, and teaching and learning.

202

Triply redundant integrated navigation and asset visibility system  

DOE Patents (OSTI)

Methods and apparatus are described for a navigation system. A method includes providing a global positioning system fix having a plurality of tracking parameters; providing a theater positioning system fix; monitoring the plurality of tracking parameters for predetermined conditions; and, when the predetermined conditions are met, sending a notifying signal and switching to the theater positioning system fix as a primary fix. An apparatus includes a system controller; a global positioning system receiver coupled to the system controller; a radio frequency locating receiver coupled to the system controller; and an operator interface coupled to the system controller.

Smith, Stephen F.; Moore, James A.

2013-01-22T23:59:59.000Z

203

Refractive index of glass and its dipersion for visible light.  

Science Conference Proceedings (OSTI)

The classification of optical glass and empirical relations between the refractive index and its dispersion are discussed in terms of moments of the glass's IR and UV absorption spectra. The observed linear dependence of index on dispersion within glass families is shown to arise primarily from the approximately linear superposition of the electronic absorptions of glass former and glass modifiers. The binary classification into crown and flint glasses is also based primarily on electronic spectra: Crown glasses are 'wide-gap' materials with excitation energies greater than {approx}12.4 eV, while flint glasses are their 'narrow-gap' counterpart.

Smith, D. Y.; Karstens, W. (Physics); (Univ. of Vermont); (Saint Michael's Coll.)

2010-01-01T23:59:59.000Z

204

Novel rectenna for collection of infrared and visible radiation.  

E-Print Network (OSTI)

??This dissertation presents the rectifying antennas potential for harvesting solar power, along with a novel design for a solar rectenna. The suns general features and… (more)

Sarehraz, Mohammad

2005-01-01T23:59:59.000Z

205

Hybrid Infrared and Visible Light Projection for Location Tracking  

E-Print Network (OSTI)

-output light emitting diodes. Figure 5. Inside our projector: A) LED light source B) culminating lens C) DMD for application content. In [4], Nii et al. created an infrared projector prototype using discrete light emitting diodes (LEDs). The projection lens focused directly onto the LED array creating a low resolution infrared

Olsen Jr., Dan R.

206

Visibility Driven BVH Build Up Algorithm for Ray Tracing  

E-Print Network (OSTI)

heuristics. Moreover, it is also possible to lower the construction time and memory usage by subdividing only's website. For any questions on other usage of the document than scholarly purposes you are obliged University, Botanick´a 554/68a, 602 00 Brno, Czech Republic bFaculty of Electrical Engineering, Czech

Havran, Vlastimil

207

Measurement of Visible and Near-IR Optical Properties of ...  

Science Conference Proceedings (OSTI)

... to the estimated total expanded uncertainty (95 ... ex- tinction measurements of polystyrene and Plexiglas ... than estimations based on graphite re- sults ...

2005-06-21T23:59:59.000Z

208

Estimation of Incident Photosynthetically Active Radiation from GOES Visible Imagery  

Science Conference Proceedings (OSTI)

Incident photosynthetically active radiation (PAR) is an important parameter for terrestrial ecosystem models. Because of its high temporal resolution, the Geostationary Operational Environmental Satellite (GOES) observations are very suited to ...

Tao Zheng; Shunlin Liang; Kaicun Wang

2008-03-01T23:59:59.000Z

209

Comparison of Visible and Infra-Red Imagery for Face ...  

Science Conference Proceedings (OSTI)

... from the center of the 1-meter walking range ... licensed use limited to: NIST Virtual Library (NVL). ... Projections and the Neural Tree Net- work,” Artificial ...

2011-01-25T23:59:59.000Z

210

Switchable heat pipe assembly  

SciTech Connect

The heat pipe assembly is formed into an H-shape or a Y-shape. The H-shaped configuration comprises two heat pipes, each having condenser and evaporator sections with wicking therein coupled by a tube with wick at their evaporator sections. The Y-shaped configuration utilizes a common evaporator section in place of the two evaporator sections of the H-shaped configuration. In both configurations, the connection between the vapor spaces of the two heat pipes equalizes vapor pressure within the heat pipes. Although both heat pipes have wicks, they have sufficient fluid only to saturate a single pipe. If heat is applied to the condenser section of one of the pipes, this heat pipe becomes inoperative since all the fluid is transferred to the second pipe which can operate with a lower thermal load.

Sun, T.H.; Basiulis, A.

1977-02-15T23:59:59.000Z

211

Insulated pipe clamp design  

SciTech Connect

Thin wall large diameter piping for breeder reactor plants can be subjected to significant thermal shocks during reactor scrams and other upset events. On the Fast Flux Test Facility, the addition of thick clamps directly on the piping was undesired because the differential metal temperatures between the pipe wall and the clamp could have significantly reduced the pipe thermal fatigue life cycle capabilities. Accordingly, an insulated pipe clamp design concept was developed. The design considerations and methods along with the development tests are presented. Special considerations to guard against adverse cracking of the insulation material, to maintain the clamp-pipe stiffness desired during a seismic event, to minimize clamp restraint on the pipe during normal pipe heatup, and to resist clamp rotation or spinning on the pipe are emphasized.

Anderson, M.J.; Hyde, L.L.; Wagner, S.E.; Severud, L.K.

1980-01-01T23:59:59.000Z

212

Flexible ocean upwelling pipe  

DOE Patents (OSTI)

In an ocean thermal energy conversion facility, a cold water riser pipe is releasably supported at its upper end by the hull of the floating facility. The pipe is substantially vertical and has its lower end far below the hull above the ocean floor. The pipe is defined essentially entirely of a material which has a modulus of elasticity substantially less than that of steel, e.g., high density polyethylene, so that the pipe is flexible and compliant to rather than resistant to applied bending moments. The position of the lower end of the pipe relative to the hull is stabilized by a weight suspended below the lower end of the pipe on a flexible line. The pipe, apart from the weight, is positively buoyant. If support of the upper end of the pipe is released, the pipe sinks to the ocean floor, but is not damaged as the length of the line between the pipe and the weight is sufficient to allow the buoyant pipe to come to a stop within the line length after the weight contacts the ocean floor, and thereafter to float submerged above the ocean floor while moored to the ocean floor by the weight. The upper end of the pipe, while supported by the hull, communicates to a sump in the hull in which the water level is maintained below the ambient water level. The sump volume is sufficient to keep the pipe full during heaving of the hull, thereby preventing collapse of the pipe.

Person, Abraham (Los Alamitos, CA)

1980-01-01T23:59:59.000Z

213

Heat pipe fabrication  

SciTech Connect

A heat pipe is disclosed which is fabricated with an artery arranged so that the warp and weave of the wire mesh are at about a 45/sup 0/ angle with respect to the axis of the heat pipe.

Leinoff, S.; Edelstein, F.; Combs, W.

1977-01-18T23:59:59.000Z

214

Common Types of Pipe  

Science Conference Proceedings (OSTI)

...Reseamed and drifted pipe is similar to casing, but is manufactured and inspected in a manner that assures the well driller that the pipe string will have a predetermined minimum diameter sufficient to permit unrestricted passage of pumps or

215

CRAD, Nuclear Facility Construction - Piping and Pipe Supports Inspection -  

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

Construction - Piping and Pipe Supports Construction - Piping and Pipe Supports Inspection - March 29, 2012 CRAD, Nuclear Facility Construction - Piping and Pipe Supports Inspection - March 29, 2012 March 29, 2012 Nuclear Facility Construction - Piping and Pipe Supports Inspection Criteria, Approach and Lines of Inquiry (HSS CRAD 45-52, Rev. 0) For the purpose of this criteria review and approach, this Criteria Review and Approach Document (CRAD) includes piping and pipe supports and attachments of the pipe supports to structures (concrete, structural steel, or embed plates). Pipe supports include rigid restraints, welded attachments to piping, struts, snubbers, spring cans, and constant supports. Inspection of pipe whip restraints are also included in this CRAD. Selection of nuclear facility piping systems for inspection should be

216

Abrasion resistant heat pipe  

DOE Patents (OSTI)

A specially constructed heat pipe is described for use in fluidized bed combustors. Two distinct coatings are spray coated onto a heat pipe casing constructed of low thermal expansion metal, each coating serving a different purpose. The first coating forms aluminum oxide to prevent hydrogen permeation into the heat pipe casing, and the second coating contains stabilized zirconium oxide to provide abrasion resistance while not substantially affecting the heat transfer characteristics of the system.

Ernst, D.M.

1984-10-23T23:59:59.000Z

217

Abrasion resistant heat pipe  

DOE Patents (OSTI)

A specially constructed heat pipe for use in fluidized bed combustors. Two distinct coatings are spray coated onto a heat pipe casing constructed of low thermal expansion metal, each coating serving a different purpose. The first coating forms aluminum oxide to prevent hydrogen permeation into the heat pipe casing, and the second coating contains stabilized zirconium oxide to provide abrasion resistance while not substantially affecting the heat transfer characteristics of the system.

Ernst, Donald M. (Leola, PA)

1984-10-23T23:59:59.000Z

218

Internal pipe attachment mechanism  

DOE Patents (OSTI)

An attachment mechanism is described for repairing or extending fluid carrying pipes, casings, conduits, etc. utilizing one-way motion of spring tempered fingers to provide a mechanical connection between the attachment mechanism and the pipe. The spring tempered fingers flex to permit insertion into a pipe to a desired insertion depth. The mechanical connection is accomplished by reversing the insertion motion and the mechanical leverage in the fingers forces them outwardly against the inner wall of the pipe. A seal is generated by crushing a sealing assembly by the action of setting the mechanical connection. 6 figures.

Bast, R.M.; Chesnut, D.A.; Henning, C.D.; Lennon, J.P.; Pastrnak, J.W.; Smith, J.A.

1994-12-13T23:59:59.000Z

219

Heat pipe technology issues  

SciTech Connect

Critical high temperature, high power applications in space nuclear power designs are near the current state of the art of heat pipe technology in terms of power density, operating temperature, and lifetime. Recent heat pipe development work at Los Alamos National Laboratory has involved performance testing of typical space reactor heat pipe designs to power levels in excess of 19 kW/cm/sup 2/ axially and 300 W/cm/sup 2/ radially at temperatures in the 1400 to 1500 K range. Operation at conditions in the 10 kW/cm/sup 2/ range has been sustained for periods of up to 1000 hours without evidence of performance degradation. The effective length for heat transport in these heat pipes was from 1.0 to 1.5 M. Materials used were molybdenum alloys with lithium employed as the heat pipe operating fluid. Shorter, somewhat lower power, molybdenum heat pipes have been life tested at Los Alamos for periods of greater than 25,000 hours at 1700 K with lithium and 20,000 hours at 1500/sup 0/K with sodium. These life test demonstrations and the attendant performance limit investigations provide an experimental basis for heat pipe application in space reactor design and represent the current state-of-the-art of high temperature heat pipe technology.

Merrigan, M.A.

1984-04-01T23:59:59.000Z

220

Heat pipe heat amplifier  

SciTech Connect

In a heat pipe combination consisting of a common condenser section with evaporator sections at either end, two working fluids of different vapor pressures are employed to effectively form two heat pipe sections within the same cavity to support an amplifier mode of operation.

Arcella, F.G.

1978-08-15T23:59:59.000Z

Note: This page contains sample records for the topic "visible piping visible" 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

Heat pipe system  

SciTech Connect

A heat pipe diode device for transferring heat from a heat source component to a heat sink wall is described. It contains a heat pipe body member attached to the best source; the heat source having a wall forming at least a portion of the normal evaporator section of the heat pipe diode; a working fluid within the body member; a cover for the heat pipe diode forming at least a portion of the heat sink wall; the cover forming the normal condenser for the heat pipe diode; a wick connected between the condenser and the evaporator of the heat pipe diode; means for retaining the wick adjacent the heat pipe wall; a wick support plate adjacent to the cover; the wick being attached to the support plate; means for holding the wick in contact with the cover; and means, responsive to excessive temperatures at the heat sink wall, for moving the support plate and a portion of the wick away from the cover to thereby substantially reduce heat flow in the reverse direction through said heat pipe diode device.

Kroebig, H.L.; Riha, F.J. III

1974-12-03T23:59:59.000Z

222

Heat pipe methanator  

DOE Patents (OSTI)

A heat pipe methanator for converting coal gas to methane. Gravity return heat pipes are employed to remove the heat of reaction from the methanation promoting catalyst, transmitting a portion of this heat to an incoming gas pre-heat section and delivering the remainder to a steam generating heat exchanger.

Ranken, William A. (Los Alamos, NM); Kemme, Joseph E. (Los Alamos, NM)

1976-07-27T23:59:59.000Z

223

Unstable heat pipes  

DOE Green Energy (OSTI)

Heat pipes are an important feature of models of vapor-dominated geothermal reservoirs. Numerical experiments reveal that a vapor-dominated heat pipe is unstable if pressure is controlled at shallow levels. This instability is discussed in physical terms, and some implications for geothermal reservoirs are considered. 9 refs., 10 figs.

McGuinness, M.J.; Pruess, K.

1987-10-01T23:59:59.000Z

224

Heat pipe development status  

SciTech Connect

Test heat pipes have been operated in the 1400 K to 1700 K range for periods in excess of 20,000 hours with the objective of understanding and controlling corrosion and failure mechanisms. The results of a post test analysis of one of these heat pipes that was operated for 25,216 hours at 1700 K are reviewed and the implications for heat pipe lifetime discussed. An in-process report of an investigation of transient heat pipe behavior is presented. This investigation is being conducted as a result of restart problems encountered during life test of a 2 m. radiation cooled heat pipe. The results of a series of shut-down tests from power and temperature are given and probable causes of the restart problem discussed.

Merrigan, M.A.

1984-01-01T23:59:59.000Z

225

Extendable pipe crawler  

DOE Patents (OSTI)

A pipe crawler is described having a front leg assembly and a back leg assembly connected together by two air cylinders, each leg assembly having four extendable legs and a pair of actuators for sliding the extendable legs radially outward to increase the range of the legs when the pipe crawler enters a section of a pipe having a larger diameter. The crawler crawls by inchworm'-like motion, the front leg assembly and back leg assembly alternately engaging and disengaging the wall of the pipe to hold the pipe crawler as the air cylinders alternately advance the front leg assembly and bring up the rear leg assembly. The pair of actuators of each leg assembly are parallel, adjacent and opposing acting so that each slides two adjacent extendable legs radially outward. 5 figures.

Hapstack, M.

1991-05-28T23:59:59.000Z

226

Extendable pipe crawler  

DOE Patents (OSTI)

A pipe crawler having a front leg assembly and a back leg assembly connected together by two air cylinders, each leg assembly having four extendable legs and a pair of actuators for sliding the extendable legs radically outward to increase the range of the legs when the pipe crawler enters a section of pipe having a larger diameter. The crawler crawls by inchworm''-like motion, the front leg assembly and back leg assembly alternately engaging and disengaging the wall of the pipe to hold the pipe crawler as the air cylinders alternately advance the front leg assembly and bring up the rear leg assembly. The pair of actuators of each leg assembly are parallel, adjacent and opposing acting so that each slides two adjacent extendable legs radially outward. 5 figs.

Hapstack, M.

1990-05-01T23:59:59.000Z

227

Piping stress handbook. Second edition  

Science Conference Proceedings (OSTI)

This abridged volume contains the following: Coefficients of thermal expansion. Allowable stress range for ANSI/ASME Power Piping Code B31.1. Stress intensification and flexibility factors. Pressure and stress ratios. Design criteria for allowable loads, moment, and stresses. Properties of pipe. Weight and dimensions of pipe and components. Pipe support selection and design. Fundamentals of expansion joints. Index.

Helguero, V.

1986-01-01T23:59:59.000Z

228

Flexible ultrasonic pipe inspection apparatus  

DOE Patents (OSTI)

Pipe crawlers, pipe inspection {open_quotes}rabbits{close_quotes} and similar vehicles are widely used for inspecting the interior surfaces of piping systems, storage tanks and process vessels for damaged or flawed structural features. This paper describes the design of a flexible, modular ultrasonic pipe inspection apparatus.

Jenkins, C.F.; Howard, B.D.

1994-01-01T23:59:59.000Z

229

Service Water Piping Guideline  

Science Conference Proceedings (OSTI)

In the years 1988 and 1989, EPRI organized the Service Water Working Group (SWWG) to identify and help resolve the many issues surrounding service water (SW) systems in nuclear power plants. One issue identified by the SWWG was corrosion in service water piping systems. Interest in this issue resulted in the development of several technical reports: Guidelines for the Repair/Replacement Welding of Nuclear Service Water Systems, TR-100386; Guide for the Examination of Service Water System Piping, TR-10206...

2005-09-30T23:59:59.000Z

230

Freezable heat pipe  

SciTech Connect

A heat pipe whose fluid can be repeatedly frozen and thawed without damage to the casing. An additional part is added to a conventional heat pipe. This addition is a simple porous structure, such as a cylinder, self-supporting and free standing, which is dimensioned with its diameter not spanning the inside transverse dimension of the casing, and with its length surpassing the depth of maximum liquid.

Ernst, Donald M. (Leola, PA); Sanzi, James L. (Lancaster, PA)

1981-02-03T23:59:59.000Z

231

Heat Pipe Integrated Microsystems  

SciTech Connect

The trend in commercial electronics packaging to deliver ever smaller component packaging has enabled the development of new highly integrated modules meeting the demands of the next generation nano satellites. At under ten kilograms, these nano satellites will require both a greater density electronics and a melding of satellite structure and function. Better techniques must be developed to remove the subsequent heat generated by the active components required to-meet future computing requirements. Integration of commercially available electronics must be achieved without the increased costs normally associated with current generation multi chip modules. In this paper we present a method of component integration that uses silicon heat pipe technology and advanced flexible laminate circuit board technology to achieve thermal control and satellite structure. The' electronics/heat pipe stack then becomes an integral component of the spacecraft structure. Thermal management on satellites has always been a problem. The shrinking size of electronics and voltage requirements and the accompanying reduction in power dissipation has helped the situation somewhat. Nevertheless, the demands for increased onboard processing power have resulted in an ever increasing power density within the satellite body. With the introduction of nano satellites, small satellites under ten kilograms and under 1000 cubic inches, the area available on which to place hot components for proper heat dissipation has dwindled dramatically. The resulting satellite has become nearly a solid mass of electronics with nowhere to dissipate heat to space. The silicon heat pipe is attached to an aluminum frame using a thermally conductive epoxy or solder preform. The frame serves three purposes. First, the aluminum frame provides a heat conduction path from the edge of the heat pipe to radiators on the surface of the satellite. Secondly, it serves as an attachment point for extended structures attached to the satellite such as solar panels, radiators, antenna and.telescopes (for communications or sensors). Finally, the packages make thermal contact to the surface of the silicon heat pipe through soft thermal pads. Electronic components can be placed on both sides of the flexible circuit interconnect. Silicon heat pipes have a number of advantages over heat pipe constructed from other materials. Silicon heat pipes offer the ability to put the heat pipe structure beneath the active components of a processed silicon wafer. This would be one way of efficiently cooling the heat generated by wafer scale integrated systems. Using this technique, all the functions of a satellite could be reduced to a few silicon wafers. The integration of the heat pipe and the electronics would further reduce the size and weight of the satellite.

Gass, K.; Robertson, P.J.; Shul, R.; Tigges, C.

1999-03-30T23:59:59.000Z

232

Apparatus for moving a pipe inspection probe through piping  

DOE Patents (OSTI)

A method and apparatus are disclosed for controllably moving devices for cleaning or inspection through piping systems, including piping systems with numerous piping bends therein, by using hydrostatic pressure of a working fluid introduced into the piping system. The apparatus comprises a reservoir or other source for supplying the working fluid to the piping system, a launch tube for admitting the device into the launcher and a reversible, positive displacement pump for controlling the direction and flow rate of the working fluid. The device introduced into the piping system moves with the flow of the working fluid through the piping system. The launcher attaches to the valved ends of a piping system so that fluids in the piping system can recirculate in a closed loop. The method comprises attaching the launcher to the piping system, supplying the launcher with working fluid, admitting the device into the launcher, pumping the working fluid in the direction and at the rate desired so that the device moves through the piping system for pipe cleaning or inspection, removing the device from the launcher, and collecting the working fluid contained in the launcher. 8 figs.

Zollinger, W.T.; Appel, D.K.; Lewis, G.W.

1995-07-18T23:59:59.000Z

233

Heat pipes and use of heat pipes in furnace exhaust  

DOE Patents (OSTI)

An array of a plurality of heat pipe are mounted in spaced relationship to one another with the hot end of the heat pipes in a heated environment, e.g. the exhaust flue of a furnace, and the cold end outside the furnace. Heat conversion equipment is connected to the cold end of the heat pipes.

Polcyn, Adam D. (Pittsburgh, PA)

2010-12-28T23:59:59.000Z

234

Heat pipe array heat exchanger  

DOE Patents (OSTI)

A heat pipe arrangement for exchanging heat between two different temperature fluids. The heat pipe arrangement is in a ounterflow relationship to increase the efficiency of the coupling of the heat from a heat source to a heat sink.

Reimann, Robert C. (Lafayette, NY)

1987-08-25T23:59:59.000Z

235

Piping inspection instrument carriage  

DOE Patents (OSTI)

This invention, an instrument carriage for inspection of piping, comprises front and rear leg assemblies for engaging the interior of the piping and supporting and centering the carriage therein, an instrumentation arm carried by a shaft system running from front to rear leg assemblies. The shaft system has a screw shaft for moving the arm axially and a spline gear for moving the arm azimuthally. The arm has a pair of air cylinders that raise and lower a plate in the radial direction. On the plate are probes including, an eddy current probe and an ultrasonic testing probe. The ultrasonic testing probe is capable of spinning 360[degrees] about its axis.

Hapstack, M.; Talarek, T.R.; Zollinger, W.T.; Heckendorn, F.M. II; Park, L.R.

1991-01-01T23:59:59.000Z

236

Piping inspection instrument carriage  

DOE Patents (OSTI)

This invention, an instrument carriage for inspection of piping, comprises front and rear leg assemblies for engaging the interior of the piping and supporting and centering the carriage therein, an instrumentation arm carried by a shaft system running from front to rear leg assemblies. The shaft system has a screw shaft for moving the arm axially and a spline gear for moving the arm azimuthally. The arm has a pair of air cylinders that raise and lower a plate in the radial direction. On the plate are probes including, an eddy current probe and an ultrasonic testing probe. The ultrasonic testing probe is capable of spinning 360{degrees} about its axis.

Hapstack, M.; Talarek, T.R.; Zollinger, W.T.; Heckendorn, F.M. II; Park, L.R.

1991-12-31T23:59:59.000Z

237

Variable conductance heat pipe enhancement  

SciTech Connect

This patent describes a heat pipe. It comprises a tubular hollow heat pipe having an evaporator end and an opposite condenser end, the heat pipe having a cross-sectional area and having a condenser length extending from the condenser end the condenser length including an active length where evaporated fluid condenses; an evaporatable and condensable fluid in the heat pipe for evaporating when receiving heat near the evaporation end and for condensing when giving up heat in the active length; a noncondensable gas near the condenser end and in the condenser length of the heat pipe; a restriction member fixed in the heat pipe near the condenser end, the restriction member extending only along a portion of the condenser length and being spaced away from the evaporation end of the heat pipe, the restriction member having a varied cross-sectional area along the length of the restriction member which is less than the cross-sectional area of the heat pipe for confining the gas and a portion of the fluid in the active condenser length, to an area around the restriction member and in the heat pipe; and a fixed ligament connected between the restriction member and the heat pipe for fixing the restriction member in the heat pipe, the ligament being fixed between the condenser end of the heat pipe end and an end of the restriction member which is closest to the condenser end.

Kneidel, K.E.

1991-09-03T23:59:59.000Z

238

Heat pipe applications workshop report  

SciTech Connect

The proceedings of the Heat Pipe Applications Workshop, held at the Los Alamos Scientific Laboratory October 20-21, 1977, are reported. This workshop, which brought together representatives of the Department of Energy and of a dozen industrial organizations actively engaged in the development and marketing of heat pipe equipment, was convened for the purpose of defining ways of accelerating the development and application of heat pipe technology. Recommendations from the three study groups formed by the participants are presented. These deal with such subjects as: (1) the problem encountered in obtaining support for the development of broadly applicable technologies, (2) the need for applications studies, (3) the establishment of a heat pipe technology center of excellence, (4) the role the Department of Energy might take with regard to heat pipe development and application, and (5) coordination of heat pipe industry efforts to raise the general level of understanding and acceptance of heat pipe solutions to heat control and transfer problems.

Ranken, W.A.

1978-04-01T23:59:59.000Z

239

Drill pipe protector development  

DOE Green Energy (OSTI)

The Geothermal Drilling Organization (GDO), formed in the early 1980s by the geothermal industry and the U.S. Department of Energy (DOE) Geothermal Division, sponsors specific development projects to advance the technologies used in geothermal exploration, drilling, and production phases. Individual GDO member companies can choose to participate in specific projects that are most beneficial to their industry segment. Sandia National Laboratories is the technical interface and contracting office for the DOE in these projects. Typical projects sponsored in the past have included a high temperature borehole televiewer, drill bits, muds/polymers, rotary head seals, and this project for drill pipe protectors. This report documents the development work of Regal International for high temperature geothermal pipe protectors.

Thomerson, C.; Kenne, R. [Regal International Corp., Corsicanna, TX (United States); Wemple, R.P. [Sandia National Lab., Albuquerque, NM (United States)] [ed.] [and others

1996-03-01T23:59:59.000Z

240

Pipe-to-pipe impact analysis - Nuclear Engineering Multimedia  

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

Pipe-to-pipe impact analysis Pipe-to-pipe impact analysis Director's Welcome Organization Achievements Highlights Fact Sheets, Brochures & Other Documents Multimedia Library About Nuclear Energy Nuclear Reactors Designed by Argonne Argonne's Nuclear Science and Technology Legacy Opportunities within NE Division Visit Argonne Work with Argonne Contact us For Employees Site Map Help Join us on Facebook Follow us on Twitter NE on Flickr Celebrating the 70th Anniversary of Chicago Pile 1 (CP-1) Argonne OutLoud on Nuclear Energy Argonne Energy Showcase 2012 Engineering Analysis Multimedia Bookmark and Share EA Multimedia, a collection of videos and audios featuring activities related to the Engineering Analysis Department Pipe-to-pipe impact analysis Quicktime video Quicktime Format - High Bandwidth | Size: 12 MB | Bit Rate:

Note: This page contains sample records for the topic "visible piping visible" 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

Pipe Insulation Economies  

E-Print Network (OSTI)

Pipe Insulation Economies is a computer program written in IBM basic to simplify the economic insulation thickness for an insulated pipe. Many articles have been written on this subject, from simple nomographs to a small book written in 1976 by the Federal Energy Administration, called "Economic Thickness for Industrial Insulation (ETI)." This paper is meant to fall somewhere between these extremes without sacrificing the accuracy necessary for economic considerations. Within this text, insulation is dealt with not as a material but as a method to slow heat transfer. To simplify the various mechanisms by which heat is transferred, the variable "thermal conductivity" is used. This is modeled for average insulation temperature. Another variable which has caused problems in the past is the ambient air film coefficient, or surface resistance. This program deals with this coefficient by making an initial assumption, then using an iterative process to refine the actual values before making the economic calculations. The program will use the input data to determine first of all the heat loss in BTU per hr/ft. of pipe. Using this result the lowest annual cost, therefore the most economical insulation thickness, is determined.

Schilling, R. E.

1986-06-01T23:59:59.000Z

242

Aerogel Impregnated Polyurethane Piping and Duct Insulation ...  

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

Polyurethane Piping and Duct Insulation Aerogel Impregnated Polyurethane Piping and Duct Insulation Emerging Technologies Project for the 2013 Building Technologies Office's...

243

Pipe crawler with stabilizing midsection  

DOE Patents (OSTI)

A pipe crawler is described having a midsection that provides the stability and flexibility to allow the pipe crawler to negotiate curved and uneven segments of piping while traveling through piping systems. The pipe crawler comprises a front leg assembly, a rear leg assembly, a midsection with a gimbal at each end for connecting the midsection to the front and rear leg assemblies in a flexible manner, and an air cylinder for changing the distance between the front and rear leg assemblies. The pipe crawler moves in ''inch worm'' fashion with the front and rear leg assemblies alternating between an extended and a retracted position as the air cylinder moves the retracted leg assembly forward. The midsection has a plurality of legs extending radially for holding the midsection within a maximum displacement from the piping axis so that the gimbals are not pivoted to extreme angles where they might lock up or seize. When the midsection is displaced sufficiently, its legs with wheels on each end engage the interior surface of the piping and prevent further displacement. Using two gimbals divides the angle between the planes defined by the front and rear leg assemblies which also helps to prevent excessive gimbal pivoting. 5 figures.

Zollinger, W.T.; Treanor, R.C.

1994-12-27T23:59:59.000Z

244

Vapor spill pipe monitor  

DOE Patents (OSTI)

The invention is a method and apparatus for continually monitoring the composition of liquefied natural gas flowing from a spill pipe during a spill test by continually removing a sample of the LNG by means of a probe, gasifying the LNG in the probe, and sending the vaporized LNG to a remote ir gas detector for analysis. The probe comprises three spaced concentric tubes surrounded by a water jacket which communicates with a flow channel defined between the inner and middle, and middle and outer tubes. The inner tube is connected to a pump for providing suction, and the probe is positioned in the LNG flow below the spill pipe with the tip oriented partly downward so that LNG is continuously drawn into the inner tube through a small orifice. The probe is made of a high thermal conductivity metal. Hot water is flowed through the water jacket and through the flow channel between the three tubes to provide the necessary heat transfer to flash vaporize the LNG passing through the inner channel of the probe. The gasified LNG is transported through a connected hose or tubing extending from the probe to a remote ir sensor which measures the gas composition.

Bianchini, G.M.; McRae, T.G.

1983-06-23T23:59:59.000Z

245

Geothermal district piping - A primer  

DOE Green Energy (OSTI)

Transmission and distribution piping constitutes approximately 40 -60% of the capital costs of typical geothermal district heating systems. Selections of economical piping suitable for the fluid chemistry is critical. Presently, most piping (56%) in geothermal systems is of asbestos cement construction. Some fiberglass (19%) and steel (19%) is also in use. Identification of an economical material to replace asbestos cement is important to future project development. By providing information on relative costs, purchase considerations, existing material performance and new products, this report seeks to provide a background of information to the potential pipe purchaser. A brief discussion of the use of uninsulated piping in geothermal district heating systems is also provided. 5 refs., 19 figs., 1 tab.

Rafferty, K.

1989-11-01T23:59:59.000Z

246

Solar heat pipe feedback turbogenerator  

SciTech Connect

The conversion of radiant heat to electricity by a heat pipe-turbogenerator combination is described. The heat pipe-tubogenerator assembly is suitably externally insulated, as by a vacuum shield, to prevent heat losses and heat is recovered from the condenser portion of the heat pipe and returned to the evaporator portions. An application of the generic invention is discussed which it is employed on wall or roof portions of a building and serves as at least a partial supporting structure for these. In another application the solar heat pipe feedback turbogenerator may be incorporated in or used with reflective means, such as reflective sheet material of large area positioned to direct solar radiation onto the evaporator section of the heat pipe. The reflective means may be changed in position to follow the sun to produce maximum power during operation.

Decker, B.J.

1978-10-24T23:59:59.000Z

247

Promethus Hot Leg Piping Concept  

SciTech Connect

The Naval Reactors Prime Contractor Team (NRPCT) recommended the development of a gas cooled reactor directly coupled to a Brayton energy conversion system as the Space Nuclear Power Plant (SNPP) for NASA's Project Prometheus. The section of piping between the reactor outlet and turbine inlet, designated as the hot leg piping, required unique design features to allow the use of a nickel superalloy rather than a refractory metal as the pressure boundary. The NRPCT evaluated a variety of hot leg piping concepts for performance relative to SNPP system parameters, manufacturability, material considerations, and comparison to past high temperature gas reactor (HTGR) practice. Manufacturability challenges and the impact of pressure drop and turbine entrance temperature reduction on cycle efficiency were discriminators between the piping concepts. This paper summarizes the NRPCT hot leg piping evaluation, presents the concept recommended, and summarizes developmental issues for the recommended concept.

AM Girbik; PA Dilorenzo

2006-01-24T23:59:59.000Z

248

Functional capability of piping systems  

SciTech Connect

General Design Criterion I of Appendix A to Part 50 of Title 10 of the Code of Federal Regulations requires, in part, that structures, systems, and components important to safety be designed to withstand the effects of earthquakes without a loss of capability to perform their safety function. ne function of a piping system is to convey fluids from one location to another. The functional capability of a piping system might be lost if, for example, the cross-sectional flow area of the pipe were deformed to such an extent that the required flow through the pipe would be restricted. The objective of this report is to examine the present rules in the American Society of Mechanical Engineers Boiler and Pressure Vessel Code, Section III, and potential changes to these rules, to determine if they are adequate for ensuring the functional capability of safety-related piping systems in nuclear power plants.

Terao, D.; Rodabaugh, E.C.

1992-11-01T23:59:59.000Z

249

Pressure vessel and piping codes  

SciTech Connect

Section III of the ASME Boiler and Pressure Vessel Code contains simplified design formulas for placing bounds on the plastic deformations in nuclear power plant piping systems. For Class 1 piping a simple equation is given in terms of primary load stress indices (B/sub 1/ and B/sub 2/) and nominal pressure and bending stresses. The B/sub 1/ and B/sub 2/ stress indices reflect the capacities of various piping products to carry load without gross plastic deformation. In this paper, the significance of the indices, nominal stresses, and limits given in the Code for Class 1 piping and corresponding requirements for Class 2 and Class 3 piping are discussed. Motivation behind recent (1978-1981) changes in the indices and in the associated stress limits is presented.

Moore, S.E.; Rodabaugh, E.C.

1982-11-01T23:59:59.000Z

250

Heat pipe technology quarterly literature review. Volume 1, Number 3  

SciTech Connect

A bibliography containing 110 citations is presented. The citations are arranged in five sections on general information on heat pipes, heat pipe applications, heat pipe theory, heat pipe design, development, and fabrication, and heat pipe testing and operation.

Srinivasan, R.; Gonzales, R.W. (eds.)

1983-01-01T23:59:59.000Z

251

Micro-Columnated Loop Heat Pipe: The Future of Electronic Substrates  

E-Print Network (OSTI)

Loop Heat Pipes . . . . . . . . . . . . . . . . . . . .Heat Pipes . . . . . . . . . . . . . . . . . . . . . . . .of operation of a heat pipe [13]. . . . . . . . . . . . . .

Dhillon, Navdeep Singh

2012-01-01T23:59:59.000Z

252

Heat pipe transient response approximation.  

SciTech Connect

A simple and concise routine that approximates the response of an alkali metal heat pipe to changes in evaporator heat transfer rate is described. This analytically based routine is compared with data from a cylindrical heat pipe with a crescent-annular wick that undergoes gradual (quasi-steady) transitions through the viscous and condenser boundary heat transfer limits. The sonic heat transfer limit can also be incorporated into this routine for heat pipes with more closely coupled condensers. The advantages and obvious limitations of this approach are discussed. For reference, a source code listing for the approximation appears at the end of this paper.

Reid, R. S. (Robert Stowers)

2001-01-01T23:59:59.000Z

253

Light pipe - design for efficiency  

Science Conference Proceedings (OSTI)

The high cost and availability of materials which are clear enough to transmit light without absorption has limited the idea of piping large-scale quantities of light. The light pipe uses the principle of Total Internal Reflection, with the light guided by very accurate prisms. The transmission of light directed into the end of a Light Pipe at an angle of less than 27.6 degrees is theoretically 100% efficient. The author describes its uses and advantages for lighting offices, cold storage areas, difficult access and hazardous areas, and for solar lighting. Future directions will be to improve the economics and accuracy of the technology. 4 references, 2 figures.

Hockey, S.N.

1985-08-01T23:59:59.000Z

254

Leachate storage transport tanker loadout piping  

Science Conference Proceedings (OSTI)

This report shows the modifications to the W-025 Trench No. 31 leachate loadout discharge piping, and also the steps involved in installing the discharge piping, including dimensions and welding information. The installation of the discharge pipe should be done in accordance to current pipe installation standards. Trench No. 31 is a radioactive mixed waste land disposal facility.

Whitlock, R.W.

1994-11-18T23:59:59.000Z

255

Thermal laminarization of a stratified pipe flow  

SciTech Connect

The present work constitutes a new program that grew out of a scoping assessment by ANL to determine the propensity for pipe stratification to occur in the reactor outlet nozzles and hot-leg piping of a generic LMFBR during events producing reverse pipe flow. This paper focuses on the role that thermal buoyancy plays relative to being able to laminarize a turbulent stratified shear zone in a horizontal pipe. The preceeding can influence the behavior of a pipe stratified-backflow-recirculation zone (cold plenum water down into the hot pipe flow) which developes as the result of a temperature difference between the pipe flow and the plenum.

Oras, J.J.; Kasza, K.E.

1984-01-01T23:59:59.000Z

256

Training reduces stuck pipe costs and incidents  

SciTech Connect

Properly administered initial and refresher stuck pipe training courses have dramatically reduced the cost and number of stuck pipe incidents for many companies worldwide. These training programs have improved operator and contractor crew awareness of stuck pipe risks and fostered a team commitment in averting such incidents. The success is evident in the achievements of the companies sponsoring such training. Preventing and minimizing stuck pipe is the most significant benefit of stuck pipe training, but crews also benefit from becoming more knowledgeable about the drilling program and equipment operation. The paper discusses stuck pipe costs, stuck pipe training, prevention of stuck pipes, well bore stability, geopressured formation, reactive formation, reactive formations, unconsolidated formations, mobile formations, fractured and faulted formations, differential sticking, 8 other causes of stuck pipe, and freeing stuck pipe.

Watson, B. (Global Marine Drilling Co., Houston, TX (United States)); Smith, R. (Randy Smith Drilling School, Lafayette, LA (United States))

1994-09-19T23:59:59.000Z

257

Nitrogen heat pipe for cryocooler thermal shunt  

SciTech Connect

A nitrogen heat pipe was designed, built and tested for the purpose of providing a thermal shunt between the two stages of a Gifford-McMahan (GM) cryocooler during cooldown. The nitrogen heat pipe has an operating temperature range between 63 and 123 K. While the heat pipe is in the temperature range during the system cooldown, it acts as a thermal shunt between the first and second stage of the cryocooler. The heat pipe increases the heat transfer to the first stage of the cryocooler, thereby reducing the cooldown time of the system. When the heat pipe temperature drops below the triple point, the nitrogen working fluid freezes, effectively stopping the heat pipe operation. A small heat leak between cryocooler stages remains because of axial conduction along the heat pipe wall. As long as the heat pipe remains below 63 K, the heat pipe remains inactive. Heat pipe performance limits were measured and the optimum fluid charge was determined.

Prenger, F.C.; Hill, D.D.; Daney, D.E.; Daugherty, M.A. [Los Alamos National Lab., NM (United States); Green, G.F.; Roth, E.W. [Naval Surface Warfare Center, Annapolis, MD (United States)

1995-09-01T23:59:59.000Z

258

Compilation of EPRI High Energy Piping Guidelines  

Science Conference Proceedings (OSTI)

Condition assessment programs for highenergy piping systems are often a major aspect of a fossil utilitys inspection and maintenance program. In the past 30 years, many major failures of fossil highenergy piping have been associated with flowaccelerated corrosion of feedwater piping, creep failures of longitudinal seamwelded hot reheat and main steam piping, and corrosion fatigue failures of cold reheat steam piping. In addition to these welldocumented failures, most utilities experience failures of supp...

2008-03-31T23:59:59.000Z

259

B Plant process piping replacement feasibility study  

SciTech Connect

Reports on the feasibility of replacing existing embedded process piping with new more corrosion resistant piping between cells and between cells and a hot pipe trench of a Hanford Site style canyon facility. Provides concepts for replacement piping installation, and use of robotics to replace the use of the canyon crane as the primary means of performing/supporting facility modifications (eg, cell lining, pipe replacement, equipment reinstallation) and operational maintenenace.

Howden, G.F.

1996-02-07T23:59:59.000Z

260

Corrugated pipe adhesive applicator apparatus  

DOE Patents (OSTI)

Apparatus for coating selected portions of the troughs of a corrugated pipe with an adhesive includes a support disposed within the pipe with a reservoir containing the adhesive disposed on the support. A pump, including a spout, is utilized for supplying the adhesive from the reservoir to a trough of the pipe. A rotatable applicator is supported on the support and contacts the trough of the pipe. The applicator itself is sized so as to fit within the trough, and contacts the adhesive in the trough and spreads the adhesive in the trough upon rotation. A trough shield, supported by the support and disposed in the path of rotation of the applicator, is utilized to prevent the applicator from contacting selected portions of the trough. A locator head is also disposed on the support and provides a way for aligning the spout, the applicator, and the trough shield with the trough. 4 figs.

Shirey, R.A.

1983-06-14T23:59:59.000Z

Note: This page contains sample records for the topic "visible piping visible" 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

Heat Pipes: An Industrial Application  

E-Print Network (OSTI)

This paper reviews the basics of heat pipe exchangers. Included are how they are constructed, how they operate, where they have application, and various aspects of evaluating a potential application. After discussing the technical aspects of heat pipe exchangers, an industrial case history is presented. The case history involves a retrofit project which added heat pipes to five natural draft process heaters with a combined heat duty of 150 M Btu/hr. A heat recovery of 15 M Btu/hr has resulted from the flue gas/combustion air interchange. The paper will include design considerations, and operating and maintenance history since early 1980. A second application for heat pipes with a 12 M Btu/hr duty installed in 1983 will also be discussed.

Murray, F.

1984-01-01T23:59:59.000Z

262

Corrugated pipe adhesive applicator apparatus  

DOE Patents (OSTI)

Apparatus for coating selected portions of the troughs of a corrugated pipe within an adhesive includes a support disposed within the pipe with a reservoir containing the adhesive disposed on the support. A pump, including a spout, is utilized for supplying the adhesive from the reservoir to a trough of the pipe. A rotatable applicator is supported on the support and contacts the trough of the pipe. The applicator itself is sized so as to fit within the trough, and contacts the adhesive in the trough and spreads the adhesive in the trough upon rotation. A trough shield, supported by the support and disposed in the path of rotation of the applicator, is utilized to prevent the applicator from contacting selected portions of the trough. A locator head is also disposed on the support and provides a way for aligning the spout, the applicator, and the trough shield with the trough.

Shirey, Ray A. (North Grafton, MA)

1983-06-14T23:59:59.000Z

263

Embedded Pipe Dose Calculation Method  

Science Conference Proceedings (OSTI)

Nuclear plants contain thousands of feet of process piping embedded in walls, ceilings, and floors, many of which have radioactive contamination on internal surfaces. Decommissioning of these plants requires determining the level and character of contamination and removing the activity to levels commensurate with requirements for disposal or release. This report investigates and evaluates some measurement techniques for determining activities on internal surfaces of embedded piping through a series of co...

2000-11-22T23:59:59.000Z

264

Heat pipe turbine vane cooling  

SciTech Connect

The applicability of using heat pipe principles to cool gas turbine vanes is addressed in this beginning program. This innovative concept involves fitting out the vane interior as a heat pipe and extending the vane into an adjacent heat sink, thus transferring the vane incident heat transfer through the heat pipe to heat sink. This design provides an extremely high heat transfer rate and a uniform temperature along the vane due to the internal change of phase of the heat pipe working fluid. Furthermore, this technology can also eliminate hot spots at the vane leading and trailing edges and increase the vane life by preventing thermal fatigue cracking. There is also the possibility of requiring no bleed air from the compressor, and therefore eliminating engine performance losses resulting from the diversion of compressor discharge air. Significant improvement in gas turbine performance can be achieved by using heat pipe technology in place of conventional air cooled vanes. A detailed numerical analysis of a heat pipe vane will be made and an experimental model will be designed in the first year of this new program.

Langston, L.; Faghri, A. [Connecticut Univ., Storrs, CT (United States). Dept. of Mechanical Engineering

1995-12-31T23:59:59.000Z

265

Pipe weld crown removal device  

DOE Patents (OSTI)

This invention is comprised of a device that provides for grinding down the crown of a pipe weld joining aligned pipe sections so that the weld is substantially flush with the pipe sections joined by the weld. The device includes a cage assembly comprising a pair of spaced cage rings adapted to be mounted for rotation on the respective pipe sections on opposite sides of the weld, a plurality of grinding wheels, supported by the cage assembly for grinding down the crown of the weld, and a plurality of support shafts, each extending longitudinally along the joined pipe sections, parallel thereto, for individually mounting respective grinding wheels. Each end of the support shafts is mounted for rotation in a bearing assembly housed within a radially directed opening in a corresponding one of the cage rings so as to provide radial movement of the associated shaft, and thus of the associated grinding wheel, towards and away from the weld. A first drive sprocket provides rotation of the cage assembly around the pipe sections while a second drive unit, driven by a common motor, provides rotation of the grinding wheels.

Sword, C.K.; Sette, P.J.

1991-12-31T23:59:59.000Z

266

Piping inspection round robin  

Science Conference Proceedings (OSTI)

The piping inspection round robin was conducted in 1981 at the Pacific Northwest National Laboratory (PNNL) to quantify the capability of ultrasonics for inservice inspection and to address some aspects of reliability for this type of nondestructive evaluation (NDE). The round robin measured the crack detection capabilities of seven field inspection teams who employed procedures that met or exceeded the 1977 edition through the 1978 addenda of the American Society of Mechanical Engineers (ASME) Section 11 Code requirements. Three different types of materials were employed in the study (cast stainless steel, clad ferritic, and wrought stainless steel), and two different types of flaws were implanted into the specimens (intergranular stress corrosion cracks (IGSCCs) and thermal fatigue cracks (TFCs)). When considering near-side inspection, far-side inspection, and false call rate, the overall performance was found to be best in clad ferritic, less effective in wrought stainless steel and the worst in cast stainless steel. Depth sizing performance showed little correlation with the true crack depths.

Heasler, P.G.; Doctor, S.R. [Pacific Northwest National Lab., Richland, WA (United States)

1996-04-01T23:59:59.000Z

267

Methods for Cleaning and Evaluating Pipe-Type Cable Pipes for Retrofit with Extruded Dielectric Cable Systems  

Science Conference Proceedings (OSTI)

This report summarizes studies of pipe cleaning, "pigging," inspecting, and testing pipe-type cable pipes for re-conditioning as conduits compatible with extruded dielectric cables.

2001-12-12T23:59:59.000Z

268

Heat pipe device and heat pipe fabricating process  

Science Conference Proceedings (OSTI)

An energy saving liquid to liquid heat exchanger for a dishwasher or like device discharging hot waste water comprising a hot water tank for holding the waste water from the dishwasher and having inlet and outlet pipes, a cold water tank for holding the fresh water going to a water heater and having inlet and outlet pipes, the cold water tank disposed on top of the hot water tank, a bundle of heat pipes containing low boiling refrigerant disposed inside of the two tanks so as to extract heat from the hot water tank and give it up to the cold water tank, whereby the temperature of the fresh water leaving the heat exchanger is higher than its entering temperature.

Busch, C.H.

1982-08-10T23:59:59.000Z

269

Magnetic refrigeration apparatus with heat pipes  

DOE Patents (OSTI)

A magnetic refrigerator operating in the 4 to 20 K range utilizes heat pipes to transfer heat to and from the magnetic material at the appropriate points during the material's movement. In one embodiment circular disks of magnetic material can be interleaved with the ends of the heat pipes. In another embodiment a mass of magnetic material reciprocatingly moves between the end of the heat pipe or pipes that transmits heat from the object of cooling to the magnetic material and the end of the heat pipe or pipes that transmits heat from the magnetic material to a heat sink.

Barclay, J.A.; Prenger, F.C. Jr.

1985-10-25T23:59:59.000Z

270

Magnetic refrigeration apparatus with heat pipes  

DOE Patents (OSTI)

A magnetic refrigerator operating in the 4 to 20 K range utilizes heat pipes to transfer heat to and from the magnetic material at the appropriate points during the material's movement. In one embodiment circular disks of magnetic material can be interleaved with the ends of the heat pipes. In another embodiment a mass of magnetic material reciprocatingly moves between the end of the heat pipe of pipes that transmits heat from the object of cooling to the magnetic material and the end of the heat pipe or pipes that transmits heat from the magnetic material to a heat sink.

Barclay, John A. (Los Alamos, NM); Prenger, Jr., F. Coyne (Madison, WI)

1987-01-01T23:59:59.000Z

271

Asian and Latina Migrants in the United States and the Invisible / Visible Paradigm of Human Trafficking  

E-Print Network (OSTI)

Discontents: Essays on the New Mobility of People and Money.Discontents: Essays on the New Mobility of People and Money.

Fukushima, Annie Isabel

2012-01-01T23:59:59.000Z

272

COST-EFFECTIVE VISIBILITY-BASED DESIGN PROCEDURES FOR GENERAL OFFICE LIGHTING  

E-Print Network (OSTI)

were calculated at the stated cost per Kwh by assuming 30to the work surface. The costs per Kwh essentially span themostly dependent upon the cost per Kwh divided by the area

Clear, Robert

2013-01-01T23:59:59.000Z

273

The Visible Nulling Coronagraph--Architecture Definition and Technology Development Status  

E-Print Network (OSTI)

and optical train. A simple imaging system after this array forms the final extra-solar planet image to 4 . The fiber-optic array is a coherent spatial filter to reject residual scattered light million to achieve imaging. To keep scattered light below this 10-6 level, the optical system would need

274

The Health and Visibility Cost of Air Pollution: A Comparison of Estimation Methods  

E-Print Network (OSTI)

social cost of motor vehicle use. Journal of Transportation andvehicles: social costs and bene?ts in France. Transportation

Delucchi, Mark; Murphy, James; McCubbin, Donald

2002-01-01T23:59:59.000Z

275

Abatement of Air Pollution: Control of Particulate Matter and Visible Emissions (Connecticut)  

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

These regulations set emissions opacity standards for stationary sources with opacity continuous emissions monitoring equipment, stationary sources without such equipment, and mobile sources. The...

276

Climate Change Mitigation: Climate, Health, and Equity Implications of the Visible and the Hidden  

E-Print Network (OSTI)

2007). "Effects of ethanol (E85) versus gasoline vehicles on2007) predicts that E85 (85% ethanol, 15% gasoline) mayto power vehicles. In fact, E85 may prove to have as much or

Shonkoff, Seth Berrin

2012-01-01T23:59:59.000Z

277

OPTICAL DESIGN AND PERFORMANCE OF THE ODIN UV/VISIBLE SPECTROGRAPH AND INFRARED IMAGER INSTRUMENT  

E-Print Network (OSTI)

by mercury and sodium street lights. Radiometric calibration is not provided internally. V. Details of IR excellent spectral imaging performance and stray-light rejection. This paper first briefly describes will provide important contributions to stratospheric ozone research. The scientific analysis

Saskatchewan, University of

278

Time-resolved visible and extreme ultraviolet spectroscopy of laser-produced tin plasma  

E-Print Network (OSTI)

blackbody radiation.emit equilibrium (blackbody) radiation characteristic of theand that lost to blackbody radiation from the reemission

O'Shay, Joseph Fred

2007-01-01T23:59:59.000Z

279

Absorption of Visible Radiation by Atmospheric Aerosol Particles Fog and Cloud Water Residues  

Science Conference Proceedings (OSTI)

Light absorption by samples of atmospheric aerosol particles as a function of size was studied using the integrating sphere method. In addition, the optical properties of fog and cloud-water residues were determined. The samples were taken at two ...

Karl Andre; Ralph Dlugi; Gottfried Schnatz

1981-01-01T23:59:59.000Z

280

Do you see that I see?: effects of perceived visibility on awareness checking behavior  

Science Conference Proceedings (OSTI)

Informal interactions are a key element of group work, and many theoretical frameworks and systems have been developed to understand and support these conversations in distributed workgroups. In particular, systems used in several recent experiments ... Keywords: CMC, CSCW, attention, awareness, interaction

Jeremy Birnholtz; Nanyi Bi; Susan Fussell

2012-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "visible piping visible" 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

DAMAGE TO MITOCHONDRIAL ELECTRON TRANSPORT AND ENERGY COUPLING BY VISIBLE LIGHT  

E-Print Network (OSTI)

h· Also used is a total dissolution method for soil samplesfor monitoring methods which require dissolution of a bulk

Aggarwal, B.B.

2011-01-01T23:59:59.000Z

282

Video packet loss visibility models and their application to packet prioritization  

E-Print Network (OSTI)

of the subjective experiment setup for SD and HD videos.of the video. . . . . . . . . . . . . . . . . . . Table V.2:allocation for perceptual video quality . . . . . . . A.

Lin, Ting-Lan

2010-01-01T23:59:59.000Z

283

Time-resolved visible and extreme ultraviolet spectroscopy of laser-produced tin plasma  

E-Print Network (OSTI)

plasma: an optically thin corona and an optically thick conductionplasma heating occurs indirectly through radiative transfer and electron conduction.conduction carries energy in the laser absorption zone beyond the critical surface to heat the higher density plasma.

O'Shay, Joseph Fred

2007-01-01T23:59:59.000Z

284

Ti(III) Doped Titanium Dioxide: an Effective Strategy to Improve the Visible Light Photocatalytic Activity  

E-Print Network (OSTI)

it must be able to split water molecule into H 2 and O 2it to water in some way and finally split water molecules.

Zuo, Fan

2012-01-01T23:59:59.000Z

285

Possibility of the Visible-Channel Calibration Using Deep Convective Clouds Overshooting the TTL  

Science Conference Proceedings (OSTI)

The authors examined the possible use of deep convective clouds (DCCs), defined as clouds that overshoot the tropical tropopause layer (TTL), for the calibration of satellite measurements at solar channels. DCCs are identified in terms of the ...

B-J. Sohn; Seung-Hee Ham; Ping Yang

2009-11-01T23:59:59.000Z

286

Investigation of five types of switchable retroreflector films for enhanced visible and infrared  

E-Print Network (OSTI)

with hemispherical pits," J. Opt. Soc. Am. A 19, 2456­2466 (2002). 14. A. B. Marchant, K. D. Jeppson, and R. T. Scott

Steckl, Andrew J.

287

Determining neptunium from the visible luminescence of CaF/sub 2/:Np  

SciTech Connect

Neptunium-doped calcium fluoride cooled to 77 K shows red luminescence, main peak at 651 nm; the lifetime is 524 +/- 20 ..mu.. sec. When the luminescence is excited by an LGI-21 pulsed nitrogen laser and one-electron pulses are recorded, the limit of detection is 0.5 ppb. Measurements have been made on the effects of preparation conditions and quenching agents on the intensity and lifetime.

Aleksandruk, V.M.; Babaev, A.S.; Dem'yanova, T.A.; Stepanov, A.V.

1988-11-01T23:59:59.000Z

288

DOI: 10.1002/chem.200700480 Visible Light Induced Catalytic Water Reduction without an Electron Relay  

E-Print Network (OSTI)

-chlorophyll-a from Spirulina,[15,16] and cy- clometalated [IrACHTUNGTRENNUNG(C^N)2ACHTUNGTRENNUNG(N^N)]+ complexes photosensitizer, thereby creating charge separation at the cost of reducing the systems free energy. Numerous

Bernhard, Stefan

289

Time-resolved visible and extreme ultraviolet spectroscopy of laser-produced tin plasma  

E-Print Network (OSTI)

to exceed electron thermal energy by more than 100 times,following components: thermal energy of the electrons andenergy and electron thermal energy shown in Figure 5.30. The

O'Shay, Joseph Fred

2007-01-01T23:59:59.000Z

290

Vocal and Visible: Latino Political Mobilization in the 21st Century  

E-Print Network (OSTI)

from advances in communication technologies is found in workmany tapped into the communication technology that they werebased on modern communication technology to improve on the

Reyes, Corinna A Ph.D.

2008-01-01T23:59:59.000Z

291

Development of an airborne visibility meter. Final report 20 Feb 1981-30 Sep 1982  

SciTech Connect

A light-weight, compact nephelometer for the detection of cloud presence and the estimation of visual range was designed, fabricated, and tested. The device is intended for airborne deployment for use in a tactical weather observation system and in support of precision guided munition missions. The sensor is a fixed angle nephelometer utilizing an infrared diode at 0.88 micrometers and a silicon photovoltaic detector. The sensor was calibrated in an environmental fog chamber over a wide range of fog and haze conditions. The sensor was found to have a very wide dynamic range of sensitivity (over the decades of attenuation coefficient) and, within operational requirements for accuracy, its performance can be described by a universal algorithm. The nephelometer was field tested at AFGL's Weather Test Facility at Otis AFB; high correlations were observed with transmissometers and other forward-scatter meters.

Hansen, D.F.

1982-11-15T23:59:59.000Z

292

Humidity's influence on visible region refractive index structure parameter C2  

E-Print Network (OSTI)

. #12;Arecibo 1000 ft radio telescope, Arecibo, Puerto Rico #12;Why Radio? Radio has certain advantages. Photons carry energy E=h = hc/ Cost per photon decreases with increasing wavelength At a cost of $0.20 per. Stars are faint radio sources The Earth is the brightest MHz radio source in the solar system, 10 times

Chang, Mark J. L.

293

Assimilation of Visible-Band Satellite Data for Mesoscale Forecasting in Cloudy Conditions  

Science Conference Proceedings (OSTI)

Assimilation of satellite data can enhance the ability of a mesoscale modeling system to produce accurate short-term forecasts of clouds and precipitation, but only if there is a mechanism for the satellite-derived information to propagate ...

Alan E. Lipton; George D. Modica

1999-03-01T23:59:59.000Z

294

Two-photon (vuv and visible) resonant ionization spectroscopy of atoms and molecules  

DOE Green Energy (OSTI)

Two photon spectroscopy of argon, krypton and molecular hydrogen is considered in this paper. Experimental transition energies and two-photon rate constants are given. 4 refs., 1 tab. (LSP)

McCann, M.P.; Chen, C.H.; Payne, M.G.

1987-12-01T23:59:59.000Z

295

Cultural interfaces : (in)visible spaces in the Old City of Jerusalem  

E-Print Network (OSTI)

This thesis starts with the contemporary problematics of the famously contested place, Jerusalem, and tries to understand the impact of the conflict between Israelis and Palestinians on the fabric of the Old City. The goal ...

Nardella, Bianca Maria, 1973-

2001-01-01T23:59:59.000Z

296

A novel adaptive mechanical-wetting lens for visible and near infrared imaging  

E-Print Network (OSTI)

­554 (2006). 9. M. Vallet, B. Berge, and L. Volvelle, "Electrowetting of water and aqueous solutions on poly, and J. A. Yeh, "Dielectrically actuated liquid lens," Opt. Express 15(12), 7140­7145 (2007). 11. S. Xu, C. N. Chen, L. S. Cheng, C. C. Cheng, J. T. Yang, and J. A. Yeh, "Planar liquid confinement

Wu, Shin-Tson

297

“We Have Seen It with Our Own Eyes”: Why We Disagree about Climate Change Visibility  

Science Conference Proceedings (OSTI)

Can the phenomenon called “global climate change” be witnessed firsthand with the naked senses? The question provokes sharply divergent answers from different individuals and ideational communities. Physical scientists and experimental ...

Peter Rudiak-Gould

2013-04-01T23:59:59.000Z

298

Hierarchical visibility for guaranteed search in large-scale outdoor terrain  

Science Conference Proceedings (OSTI)

Searching for moving targets in large environments is a challenging task that is relevant in several problem domains, such as capturing an invader in a camp, guarding security facilities, and searching for victims in large-scale search and rescue scenarios. ... Keywords: Exploration, Guaranteed search, HRI, Human---robot-interaction, Moving target search, Path planning, Pursuit-evasion, Task allocation

A. Kleiner; A. Kolling; M. Lewis; K. Sycara

2013-01-01T23:59:59.000Z

299

Departmentwide audit of the visibility over the status of nuclear materials  

Science Conference Proceedings (OSTI)

Over the last 45 years, DOE has acquired and produced significant quantities of nuclear material. Much of it is in warheads in the custody of the Department of Defense. The rest is at DOE laboratories, production activities, and assembly plants. Uranium, plutonium, and tritium constitute the bulk of DOE's nuclear materials inventory. Nuclear materials managers should know the status of material and how it is being used so that stocks can be acquired, maintained, and disposed of in a safe, economical and environmentally sound manner. DOE requires its field offices to assess the status of contractor-held inventories of the material annually and to report on its use and whether it is still needed to support DOE requirements. This audit was made to determine the accuracy of assessment reports on the status of nuclear materials at DOE's two major users -- weapons research and development (R D) laboratories and production and recovery activities. Specifically, our objective was to determine if the laboratories could support a requirement for materials they reported as in use or needed. At the production sites, our objectives was to determine if the reports properly identified inactive material and described its condition and plans for disposition.

Not Available

1991-08-01T23:59:59.000Z

300

Climate Change Mitigation: Climate, Health, and Equity Implications of the Visible and the Hidden  

E-Print Network (OSTI)

ceramic wood stove with an internal combustion chamber, thencombustion coal (power generation) diesel fuel (on-road) Wood (

Shonkoff, Seth Berrin

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "visible piping visible" 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

CAN POLARIZED LIGHTING PANELS REDUCE ENERGY CONSUPTION AND IMPROVE VISIBILITY IN BUILDING INTERIORS?  

E-Print Network (OSTI)

65: 504. Effectiveness of Lighting Systems. 12. Blackwell,Factors to Practical Lighting Design and Appl. 4 (5): 45-53.communication with Bill Jones, Lighting Research Laboratory,

Berman, S.

2011-01-01T23:59:59.000Z

302

The Simultaneous Measurement of Rainfall Intensity, Drop-Size Distribution, and the Scattering of Visible Light  

Science Conference Proceedings (OSTI)

Field measurements were made of the attenuation of a low-power. He-Ne laser beam over a 272-m path. Concurrently, high-resolution (10 s) measurements of rainfall intensity were obtained at several points along the path and drop-size distributions ...

C. D. Stow; S. G. Bradley; K. Paulson; L. Couper

1991-10-01T23:59:59.000Z

303

An Isotropic Light Sensor for Measurements of Visible Actinic Flux in Clouds  

Science Conference Proceedings (OSTI)

A low-cost isotropic light sensor is described consisting of a spherical diffuser connected to a single photodiode by a light conductor. The directional response to light is isotropic to a high degree. The small, lightweight, and rugged ...

J. C. H. van der Hage; S. R. de Roode

1999-11-01T23:59:59.000Z

304

Engineering for Environmental Sustainability http://engineering.tufts.edu/ Energy-efficient Visible Light Communication  

E-Print Network (OSTI)

Light Communication What is the problem? The white light-emitting diode (LED) stands at the threshold

Tufts University

305

DAMAGE TO MITOCHONDRIAL ELECTRON TRANSPORT AND ENERGY COUPLING BY VISIBLE LIGHT  

E-Print Network (OSTI)

Procedure for Determining Plutonium," Anal. Chern. 44, 377 (H. J. Ettinger, "Plutonium Aerosol Size Characteristics,"Characterization of Particulate Plutonium Released in Fuel

Aggarwal, B.B.

2011-01-01T23:59:59.000Z

306

Line shape measurements of visible light emission from the Alcator C-Mod tokamak  

DOE Green Energy (OSTI)

Measurements have been made of the line shapes of the Balmer series of hydrogen/deuterium in the edge and divertor regions of the Alcator C-Mod tokamak. The lower series members show mostly Zeeman splitting and Doppler broadening. The higher series members exhibit considerable Stark broadening. These measurements are being used to determine the magnetic field strength, ion temperature, and electron density in the edge and divertor regions. Examples of measurements from the various regions of the tokamak are presented. {copyright} {ital 1996 American Institute of Physics.}

Welch, B.L.; Griem, H.R.; Weaver, J.L. [Institute for Plasma Research, University of Maryland, College Park, Maryland 20742-3511 (United States); Terry, J.L.; Boivin, R.L.; Lipschultz, B.; Lumma, D.; Marmar, E.S.; McCracken, G.; Rost, J.C. [Plasma Fusion Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)

1996-07-01T23:59:59.000Z

307

Decline in Global Solar Radiation with Increased Horizontal Visibility in Germany between 1964 and 1990  

Science Conference Proceedings (OSTI)

A statistically significant decrease in mean annual global solar radiation between 1964 and 1990 under completely overcast skies was found at five out of eight studied locations in Germany. A decrease of global solar radiation is also evident in ...

Beate G. Liepert; George J. Kukla

1997-09-01T23:59:59.000Z

308

Visible-Light Photocatalytic Activity of TiO2/BiFeO3 Heterostructures  

Science Conference Proceedings (OSTI)

High Thermal Energy Storage Density LiNO3-KNO3-NaNO2-KNO2 Quaternary Molten Salt System for Parabolic Trough Concentrating Solar Power Generation.

309

LCLS X-ray mirror measurements using a large aperture visible light interferometer  

Science Conference Proceedings (OSTI)

Synchrotron or FEL X-ray mirrors are required to deliver an X-ray beam from its source to an experiment location, without contributing significantly to wave front distortion. Accurate mirror figure measurements are required prior to installation to meet this intent. This paper describes how a 300 mm aperture phasing interferometer was calibrated to LCLS) at Stanford Linear Accelerator Center. Measuring focus mirrors with an interferometer requires additional calibration, because high fringe density introduces systematic errors from the interferometer's imaging optics. This paper describes how these errors can be measured and corrected. The calibration approaches described here apply equally well to interferometers larger than 300 mm aperture, which are becoming more common in optics laboratories. The objective of this effort was to install LCLS flats with < 10 nm of spherical curvature, and < 2 nm rms a-sphere. The objective was met by measuring the mirrors after fabrication, coating and mounting, using a 300 mm aperture phasing interferometer calibrated to an accuracy < 1 nm. The key to calibrating the interferometer accurately was to sample the error using independent geometries that are available. The results of those measurements helped identify and reduce calibration error sources. The approach used to measure flats applies equally well to focus mirrors, provided an additional calibration is performed to measure the error introduced by fringe density. This calibration has been performed on the 300 mm aperture interferometer, and the measurement correction was evaluated for a typical focus mirror. The 300 mm aperture limitation requires stitching figure measurements together for many X-ray mirrors of interest, introducing another possible error source. Stitching is eliminated by applying the calibrations described above to larger aperture instruments. The authors are presently extending this work to a 600 mm instrument. Instruments with 900 mm aperture are now becoming available, which would accommodate the largest mirrors of interest.

McCarville, T; Soufli, R; Pivovaroff, M

2011-03-02T23:59:59.000Z

310

To See or Not to See: The Viability of Visibility at the Grand Canyon  

E-Print Network (OSTI)

a percentage of haze as coal-fired plants in the East. Thus,cost, since Western coal-fired plants were already subjectdioxide emissions from coal-fired plants account for about

Bergman, Steven H.

1994-01-01T23:59:59.000Z

311

To See or Not to See: The Viability of Visibility at the Grand Canyon  

E-Print Network (OSTI)

control regional haze. 72 Vermont then filed a petition forEPA rules did not require Vermont to in- clude regional haze§ 52, subpart D (1993)). Vermont v. Thomas, 850 F.2d 99,

Bergman, Steven H.

1994-01-01T23:59:59.000Z

312

Metameric Modulation for Diffuse Visible Light Communications with Constant Ambient Lighting  

E-Print Network (OSTI)

untapped for wireless communications. Advancements in light emitting diode (LED) technology are making

Little, Thomas

313

Development of monolithic CMOS-compatible visible light emitting diode arrays on silicon  

E-Print Network (OSTI)

The synergies associated with integrating Si-based CMOS ICs and III-V-material-based light-emitting devices are very exciting and such integration has been an active area of research and development for quite some time ...

Chilukuri, Kamesh

2006-01-01T23:59:59.000Z

314

Tunable Transmittance of Near-infrared and Visible Light in Reconstruc...  

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

(ICMAB, Spain) have demonstrated the power of this approach by introducing tin-doped indium oxide nanocrystals (ITO NCs) into niobium oxide glass (NbOx) and showing that a new...

315

High-Speed Visible and Dual-Spectrum Videos of Machining ...  

Science Conference Proceedings (OSTI)

... Results of the NIST research are used by industry and academia to improve simulations and tooling for ... Steel workpiece, 500 m/min surface speed. ...

2013-04-10T23:59:59.000Z

316

Tunable Visible and Near-IR Emission from Sub-10 nm Etched Single-Crystal Si  

E-Print Network (OSTI)

silicon devices in the form of light- emitting diode or laser structures. KEYWORDS Silicon nanowires

Heaton, Thomas H.

317

Lighting and Human Performance II: Beyond Visibility Models Toward a Unified Human Factors Approach to Performance  

Science Conference Proceedings (OSTI)

To understand the relationship between lighting conditions and human performance, it is first necessary to identify the routes by which lighting conditions can affect human performance. There are three such routes: the visual system, the circadian photobiological system, and the perceptual system. This report updates and replaces an earlier work and explores the relationship between lighting conditions and the ability to carry out tasks in interiors.

2001-10-29T23:59:59.000Z

318

Spatial filter performance on point-target detection in various clutter conditions using visible images  

E-Print Network (OSTI)

For a search-and-track system, detection of point targets in clutter is a challenge because spatial noise in an image can be much greater than temporal noise. Suppression of clutter uses a spatial filter matched to the ...

Hwang, Susan, M. Eng. Massachusetts Institute of Technology

2007-01-01T23:59:59.000Z

319

IEEE Transactions on Consumer Electronics Visible Light Communication for Audio Systems  

E-Print Network (OSTI)

to be constantly illuminated. Keywords: audio systems, light emitting diodes; audio broadcasting. 1. Introduction. Conclusions An audio system made up of light emitting diode (LED) and LED dot matrix display is described.G. Craford, "High Brightness Light Emitting Diodes", Semiconductors and Semimetals Vol. 48, Academic Press

Pang, Grantham

320

Organizing technologies of vision: Making the invisible visible in media-laden observations  

Science Conference Proceedings (OSTI)

Sociomaterial practices produce, in many cases, opportunities for different modes of vision that further structure social practices. The very organization of the technologies of vision, or visual media, thus demands scholarly attention. Drawing on media ... Keywords: Matter, Media theory, Media-laden vision, Vision

Alexander Styhre

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "visible piping visible" 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

Improving customer order visibility to enable improved planning and decision making  

E-Print Network (OSTI)

The General Purpose Drives organization of ABB Switzerland does not capture sufficient data on the movement of customer orders through the production process to make efficient decisions on where to allocate improvement ...

Krause, Karla M. (Karla Margarete)

2011-01-01T23:59:59.000Z

322

Degradation Rates of the AVHRR Visible Channel for the NOAA 6, 7, and 9 Spacecraft  

Science Conference Proceedings (OSTI)

AVHRR channel 1 (0.57–0.69 µm) degradations were determined by comparing desert models with 68 months of observations of the Libyan Desert (20° to 30°N, 201 to 30°E). The comparisons revealed that the degradation rates were 0, 3.5% and 6.0% per ...

W. Frank Staylor

1990-06-01T23:59:59.000Z

323

Radiometric and Geometric Calibration of a Visible Spectral Electro-Optic “Fisheye” Camera Radiance Distribution System  

Science Conference Proceedings (OSTI)

Camera systems which measure a complete hemispherical field (“fisheye” lens systems), can be applied to the measurement of the radiance, but accurate radiometric and geometric calibrations are required to obtain absolute radiance data. The ...

Kenneth J. Voss; Giuseppe Zibordi

1989-08-01T23:59:59.000Z

324

Improving satellite-based convective cloud growth monitoring with visible optical depth retrievals  

Science Conference Proceedings (OSTI)

The use of geostationary satellites for monitoring the development of deep convective clouds has been recently well documented. One such approach, the University of Wisconsin Cloud-Top Cooling Rate (CTC) algorithm utilizes frequent GOES ...

Justin M. Sieglaff; Lee M. Cronce; Wayne F. Feltz

325

LATE NEWS: H9, ZnO Nanowire Based Visible-Transparent UV ...  

Science Conference Proceedings (OSTI)

L6, PECVD-SiN, Si or Si/Al2O3-Capped ED-Mode AlN/GaN Inverters · Hide details for [

326

Continuous Cyclone Barrel Flame Temperature Measurement Using Ultraviolet-Visible Emission Spectroscopy  

Science Conference Proceedings (OSTI)

Cyclone boilers represent more than 10 of the coal-fired boiler capacity in the United States and exhibit low electricity generation costs. Production of cyclone boilers, however, ended in the 1970s due to the Clean Air Act and the difficulty of cost-effectively meeting NOx emission requirements under New Source Review standards. By burning coal at high turbulence and temperature in cyclone boilers, coal ash is removed as molten slag, reducing the fly ash content of the flue gas. The high heat release ra...

2005-12-05T23:59:59.000Z

327

High Visibility Enforcement Programs: California’s State and University Traffic Safety Partnership  

E-Print Network (OSTI)

of Transportation, Office of Inspector General. March 25,Program” (15), the Office of the Inspector General of the

Cooper, Jill F; Kan, Irene; Cadet, Akilah; Rauch, Sharleen; Murphy, Christopher J.

2009-01-01T23:59:59.000Z

328

Pipe crawler with extendable legs  

DOE Patents (OSTI)

This invention is comprised of a pipe crawler for moving through a pipe in inchworm fashion having front and rear leg assemblies separated by air cylinders to increase and decrease the spacing. between assemblies. Each leg of the four legs of an assembly is moved between a wall-engaging, extended position and a retracted position by a separate air cylinder. The air cylinders of the leg assemblies are preferably arranged in pairs of oppositely directed cylinders with no pair laying in the same axial plane as another pair. Therefore, the cylinders can be as long as a leg assembly is wide and the crawler can crawl through sections of pipes where the diameter is twice that of other sections. The crawler carries a valving system, a manifold to distribute air supplied by a single umbilical air hose to the various air cylinders in a sequence controlled electrically by a controller. The crawler also utilizes a rolling mechanism, casters in this case, to reduce friction between the crawler and pipe wall thereby further extending the range of the pipe crawler.

Zollinger, W.T.

1991-04-02T23:59:59.000Z

329

Heat pipe thermal control of irradiation capsules  

SciTech Connect

From 1st international heat pipe conference; Stuttgart, F.R. Germany (15 Oct 1973). The use of heat pipes to control the temperature of irradiation capsules containing fast breeder reactor structural materials is discussed. (TFD)

Deverall, J.E.

1974-04-30T23:59:59.000Z

330

Flat heat pipe design, construction, and analysis  

SciTech Connect

This paper details the design, construction and partial analysis of a low temperature flat heat pipe in order to determine the feasibility of implementing flat heat pipes into thermophotovoltaic (TPV) energy conversion systems.

Voegler, G.; Boughey, B.; Cerza, M.; Lindler, K.W.

1999-08-02T23:59:59.000Z

331

PICEP: Pipe Crack Evaluation Program  

Science Conference Proceedings (OSTI)

We describe a computer program that calculates the crack-opening area, the critical (stable) crack length and the two-phase flow rate through cracks in ductile stainless steel pipes and steam generator tubes. The program is useful in performing leak-before-break calculations in order to demonstrate detectable leak rates prior to a through-wall flaw reaching critical size. Necessary input to the code includes a definition of material properties, loads, thermal-hydraulic conditions, pipe geometry, and crack orientation. User information is provided in the report.

Norris, D.; Okamoto, A.; Chexal, B.; Griesbach, T.

1984-08-01T23:59:59.000Z

332

Geographic Resource Map of Frozen Pipe Probabilities  

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

Presentation slide details a resource map showing the probability of frozen pipes in the geographic United States.

333

Guide for Piping Stress Analysis and Assessment  

Science Conference Proceedings (OSTI)

This report gives recommendations for piping analysis methods and integration with inspection and operating data to give estimates of risk and remaining life. The scope of the document is as follows: Objectives of piping assessment Selected literature review of assessment practices for piping and other relevant components Failure modes Inspection and operating data Piping analysis: methods and data Risk assessment Integration of analysis, inspection, and operating data for assessments and recommendations...

2010-12-23T23:59:59.000Z

334

Reduce Pumping Costs through Optimum Pipe Sizing  

SciTech Connect

BestPractices Program tip sheet discussing pumping system efficiency by reducing pumping costs through optimum pipe sizing.

2005-10-01T23:59:59.000Z

335

Heat pipe dynamics. Final report, April 30, 1981. [Uses of heat pipe, especially in solar collector  

DOE Green Energy (OSTI)

A heat-pipe flat plate solar collector is constructed like a typical flat plate collector with the exception that individual heat pipes are attached to the collector surface to transfer collected heat via a phase change from collector surface into an attached jacket containing a phase change material. The efficiency of such a collector was measured roughly. Also briefly described are: a heat-pipe heat exchanger, heat-pipe heat exchanger freeze proofing, heat-pipe attic ventilation, transfer of light bulb heat via a heat pipe to heat water, heat recovery via heat pipe, cooling of oil in engines and transmissions via heat pipe, a tracking reflector, automatic sun tracker, single-stroke vacuum pump for heat-pipe manufacture, and heat pipe heat transfer from rock bed. (LEW)

Norman, R.M. Sr.

1981-01-01T23:59:59.000Z

336

Structural Assessment of Small Bore Feeder Piping  

E-Print Network (OSTI)

Frasheri MIE491 - Capstone Team 9 March 2012 Client: W. Reinhardt Industry Partner: Candu Energy Inc. Supervisor: A. N. Sinclair CASE ONE CANDU REACTORS HAVE 380+ SMALL BORE FEEDER PIPES. THE PIPES PIPES AND VALIDATE COMPUTATIONAL METHODS COMPARED TO FULL SCALE TESTS TO FAILURE. THE CLIENT CANDU

337

Analysis of Cracked Pipe Weldments  

Science Conference Proceedings (OSTI)

EPRI estimation formulas for predicting loads necessary for crack initiation and instability can facilitate leak-before-break analysis of cracked nuclear piping. Finite-element calculations carried out in this study verified the accuracy of these formulas for analyzing through-the-wall cracks in bimetallic weldments.

1987-02-01T23:59:59.000Z

338

Dual manifold heat pipe evaporator  

DOE Patents (OSTI)

An improved evaporator section is described for a dual manifold heat pipe. Both the upper and lower manifolds can have surfaces exposed to the heat source which evaporate the working fluid. The tubes in the tube bank between the manifolds have openings in their lower extensions into the lower manifold to provide for the transport of evaporated working fluid from the lower manifold into the tubes and from there on into the upper manifold and on to the condenser portion of the heat pipe. A wick structure lining the inner walls of the evaporator tubes extends into both the upper and lower manifolds. At least some of the tubes also have overflow tubes contained within them to carry condensed working fluid from the upper manifold to pass to the lower without spilling down the inside walls of the tubes. 1 figure.

Adkins, D.R.; Rawlinson, K.S.

1994-01-04T23:59:59.000Z

339

Dual manifold heat pipe evaporator  

DOE Patents (OSTI)

An improved evaporator section for a dual manifold heat pipe. Both the upper and lower manifolds can have surfaces exposed to the heat source which evaporate the working fluid. The tubes in the tube bank between the manifolds have openings in their lower extensions into the lower manifold to provide for the transport of evaporated working fluid from the lower manifold into the tubes and from there on into the upper manifold and on to the condenser portion of the heat pipe. A wick structure lining the inner walls of the evaporator tubes extends into both the upper and lower manifolds. At least some of the tubes also have overflow tubes contained within them to carry condensed working fluid from the upper manifold to pass to the lower without spilling down the inside walls of the tubes.

Adkins, Douglas R. (Albuquerque, NM); Rawlinson, K. Scott (Albuquerque, NM)

1994-01-01T23:59:59.000Z

340

Heat-Pipe Wick Characterization  

SciTech Connect

The development of liquid metal heat-pipes for use in solar powered Stirling engines has led to an in-depth analysis of heat-pipe wick properties. To model the flow of liquid sodium through the wick its two-phase permeability measurement is of interest. The permeability will be measured by constructing a test cell made up of a wick sample sintered to a manifold. Measuring the volumetric flow rate through the wick will allow for a determination of the wick's permeability as a function of pressure. Currently, simple estimates of permeability as a function of vapor fraction of a porous media are being used as a model to calculate the two-phase permeability. The above mentioned experiment will be used to test the existing formulas validity. The plan is to make use of a known procedure for testing permeability and apply those techniques to a felt-metal wick. The results will be used to verify and/or modify the two-phase permeability estimates. With the increasing desire to replace directly illuminated engines with the much more efficient heat-pipe apparatus it is inherently clear that the usefulness of known wick properties will make wick permeability design a simpler process.

JONES II,JERRY LEE

2000-08-15T23:59:59.000Z

Note: This page contains sample records for the topic "visible piping visible" 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

Heat-Pipe Wick Characterization  

DOE Green Energy (OSTI)

The development of liquid metal heat-pipes for use in solar powered Stirling engines has led to an in-depth analysis of heat-pipe wick properties. To model the flow of liquid sodium through the wick its two-phase permeability measurement is of interest. The permeability will be measured by constructing a test cell made up of a wick sample sintered to a manifold. Measuring the volumetric flow rate through the wick will allow for a determination of the wick's permeability as a function of pressure. Currently, simple estimates of permeability as a function of vapor fraction of a porous media are being used as a model to calculate the two-phase permeability. The above mentioned experiment will be used to test the existing formulas validity. The plan is to make use of a known procedure for testing permeability and apply those techniques to a felt-metal wick. The results will be used to verify and/or modify the two-phase permeability estimates. With the increasing desire to replace directly illuminated engines with the much more efficient heat-pipe apparatus it is inherently clear that the usefulness of known wick properties will make wick permeability design a simpler process.

JONES II,JERRY LEE

2000-08-15T23:59:59.000Z

342

Hot Leg Piping Materials Issues  

SciTech Connect

With Naval Reactors (NR) approval of the Naval Reactors Prime Contractor Team (NRPCT) recommendation to develop a gas cooled reactor directly coupled to a Brayton power conversion system as the space nuclear power plant (SNPP) for Project Prometheus (References a and b) the reactor outlet piping was recognized to require a design that utilizes internal insulation (Reference c). The initial pipe design suggested ceramic fiber blanket as the insulation material based on requirements associated with service temperature capability within the expected range, very low thermal conductivity, and low density. Nevertheless, it was not considered to be well suited for internal insulation use because its very high surface area and proclivity for holding adsorbed gases, especially water, would make outgassing a source of contaminant gases in the He-Xe working fluid. Additionally, ceramic fiber blanket insulating materials become very friable after relatively short service periods at working temperatures and small pieces of fiber could be dislodged and contaminate the system. Consequently, alternative insulation materials were sought that would have comparable thermal properties and density but superior structural integrity and greatly reduced outgassing. This letter provides technical information regarding insulation and materials issues for the Hot Leg Piping preconceptual design developed for the Project Prometheus space nuclear power plant (SNPP).

V. Munne

2006-07-19T23:59:59.000Z

343

Heat pipe theory and practice: a sourcebook  

SciTech Connect

An introduction to heat pipe operating principles, types, and applications followed by a comprehensive treatment of heat pipe theory, design, and manufacture are presented. The organization of heat pipe theory provides parallel treatment of the fundamental laws of thermodynamics, heat transfer, fluid mechanics, and materials science during heat pipe analysis. For the problem-solving convenience of practicing engineers, design procedures are developed summarizing theoretical information. Methods of summarizing voluminous research information are presented in detail. Current practices in the manufacture of heat pipes are described. Current and potential applications of the heat pipe to energy systems discussed are: heat exchangers, heat recovery for HVAC systems, residential buildings, industrial processes, gasification plants, and thermal storage subsystems.

Chi, S.W.

1976-01-01T23:59:59.000Z

344

Piping inspection carriage having axially displaceable sensor  

DOE Patents (OSTI)

A pipe inspection instrument carriage is described for use with a pipe crawler for performing internal inspections of piping surfaces. The carriage has a front leg assembly, a rear leg assembly and a central support connecting the two assemblies and for mounting an instrument arm having inspection instruments. The instrument arm has a Y-arm mounted distally thereon for axially aligning the inspection instrumentation and a mounting block, a linear actuator and axial movement arm for extending the inspection instruments radially outward to operably position the inspection instruments on the piping interior. Also, the carriage has a rotation motor and gear assembly for rotating the central support and the front leg assembly with respect to the rear leg assembly so that the inspection instruments azimuthally scan the piping interior. The instrument carriage allows performance of all piping inspection operations with a minimum of moving parts, thus decreasing the likelihood of performance failure. 4 figures.

Zollinger, W.T.; Treanor, R.C.

1994-12-06T23:59:59.000Z

345

Buried Pipe Guided Wave Examination Reference Document  

Science Conference Proceedings (OSTI)

As the nuclear power fleet has aged, the industry has increased its focus on the integrity of buried piping assets. This is due to recent leaks resulting in unscheduled repair outages and release of tritium into the ground water. The Electric Power Research Institute (EPRI) has responded to the emergent issue by developing a buried pipe program, which many plants have implemented or are implementing, as well as projects to assess and develop inspection and repair technologies. There are many buried pipes...

2009-10-29T23:59:59.000Z

346

Downhole pipe selection for acoustic telemetry  

DOE Patents (OSTI)

A system is described for transmitting signals along a downhole string including a plurality of serially connected tubular pipes such as drill or production pipes, a transmitter for transmitting a signal along the string and a receiver for receiving the signal placed along the string at a location spaced from said transmitting means, wherein the pipes between the transmitter and the receiver are ordered according to length of tube to minimize loss of signal from said transmitter to said receiver. 7 figs.

Drumheller, D.S.

1995-12-19T23:59:59.000Z

347

Downhole pipe selection for acoustic telemetry  

DOE Patents (OSTI)

A system for transmitting signals along a downhole string including a plurality of serially connected tubular pipes such as drill or production pipes, a transmitter for transmitting a signal along the string and a receiver for receiving the signal placed along the string at a location spaced from said transmitting means, wherein the pipes between the transmitter and the receiver are ordered according to length of tube to minimize loss of signal from said transmitter to said receiver.

Drumheller, Douglas S. (Cedar Crest, NM)

1995-01-01T23:59:59.000Z

348

Development of a cryogenic heat pipe  

SciTech Connect

Heat pipe operating characteristics can be used to advantage in cryogenic systems. Diode operation of the heat pipe, the ability to conduct heat in one direction only, is useful in protecting the heat load if the heat sink temperature rises above the load temperature. Because of this, the heat pipe can be made to act as a thermal switch. A screened-wick, inverted-artery, cryogenic heat pipe was designed, fabricated, and tested. The tests were first conducted with hydrogen and then with oxygen as the working fluid. Heat pipe performance limits were measured as a function of operating temperature, and startup from both the supercritical and the frozen state was demonstrated. The heat pipe was designed to operate as a thermal diode, and transient tests were used to determine the turndown ratio. The heat pipe test results were correlated with the Los Alamos heat pipe computer code and good agreement was obtained between the predicted and measured performance. The heat pipe was developed for spacecraft sensor cooling applications. Test results show significant performance advantages over solid conductors.

Prenger, F.C.; Stewart, W.F.; Runyan, J.E.

1993-08-01T23:59:59.000Z

349

Building Energy Software Tools Directory: Pipe Designer  

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

leg in the system. You can also analyze hybrid systems consisting of new and existing piping and reverse-return layouts The familiar, intuitive Windows user interface will...

350

NETL: News Release - Intelligent Pipe Technology Communicates...  

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

May 4, 2005 Intelligent Pipe Technology Communicates Faster than Internet Technology on Verge of Commercialization Provides Fast, Reliable Communication During Downhole Drilling...

351

Building Energy Software Tools Directory: Pipe Designer  

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

and closed systems using virtually any fluid with known viscosity and specific gravity. Enter coil flow rates and pressure drops along with pipe lengths -- the program will...

352

Dismantling techniques for reactor steel piping  

SciTech Connect

Two cutting techniques have been developed for dismantling the pipes connected to the Japan Power Demonstration Reactor (JPDR) pressure vessel. They are the rotary disk knife cutting system for dismantling relatively large pipes, such as the primary cooling system, and the shaped explosive cutting systems for cutting relatively small pipes in air or water. Basic cutting tests were performed to determine the optimum characteristics of the cutting systems and to conduct a safety evaluation by studying the effects of blasting on surrounding areas. Mock-up tests confirmed the applicability of the newly developed dismantling systems for JPDR dismantlement by successfully cutting test pipes with these systems.

Yanagihara, S.; Hiraga, F.; Nakamura, H. (Japan Atomic Energy Research Inst., Tokai, Ibaraki (Japan))

1989-08-01T23:59:59.000Z

353

Aircraft Thermal Management Using Loop Heat Pipes.  

E-Print Network (OSTI)

??The objective of this thesis was to determine the feasibility of using loop heat pipes to dissipate waste heat from power electronics to the skin… (more)

Fleming, Andrew J.

2009-01-01T23:59:59.000Z

354

Experimental Investigation of Bendable Heat Pipes.  

E-Print Network (OSTI)

??Heat pipes are highly conductive heat transfer devices. They use the latent heat of the working fluid for efficient heat transfer over a very small… (more)

ODHEKAR, DHANANJAY

2005-01-01T23:59:59.000Z

355

Apparatus for screwing pipes together  

Science Conference Proceedings (OSTI)

A power tongs for threadedly connecting together pipes which are to constitute casings for boreholes has a platform for a reciprocable slide which supports a power-driven threading clamp and a counter device. The clamp and the counter device are connected to each other by several level compensating hydraulic cylinders each of which is movable horizontally within limits relative to the slide against the opposition of resilient support elements. The upper end portions of the cylinders are connected to a holding plate for the clamp.

Reinholdt, B.; Bock, H. -Ch.

1985-01-08T23:59:59.000Z

356

Capacity Testing of Cured-in-Place Pipe  

Science Conference Proceedings (OSTI)

This report describes results of capacity testing of cured-in-place pipe (CIPP). Degradation of buried piping is a major issue facing nuclear power plant owners, and many plants will require repair or replacement of existing carbon steel piping components. Relining corroded steel pipe with cured-in-place pipe is an attractive and cost-effective alternative to replacing in-ground pipe.

2009-12-10T23:59:59.000Z

357

Analysis of Pipe Supports with a Trunnion Welded to the Main Piping Run  

Science Conference Proceedings (OSTI)

One configuration of pipe support that is gaining popularity, particularly on main steam and hot reheat high-energy piping, is the trunnion. In a trunnion support system, load is transferred from the main pipe to a hanger system through trunnions welded to the main pipe run. Welded trunnions are used in a variety of support configurations, and, in several cases, the support frame around the trunnion would have to be dismantled to permit inspection of the pipe-to-trunnion weld. In other ...

2013-10-22T23:59:59.000Z

358

Heat transfer. [heat transfer roller employing a heat pipe  

SciTech Connect

A heat transfer roller embodying a heat pipe is disclosed. The heat pipe is mounted on a shaft, and the shaft is adapted for rotation on its axis.

Sarcia, D.S.

1978-05-23T23:59:59.000Z

359

Statistical estimation of water distribution system pipe break risk.  

E-Print Network (OSTI)

??The deterioration of pipes in urban water distribution systems is of concern to water utilities throughout the world. This deterioration generally leads to pipe breaks… (more)

Yamijala, Shridhar

2009-01-01T23:59:59.000Z

360

Heat pipe with embedded wick structure  

SciTech Connect

A heat pipe has an embedded wick structure that maximizes capillary pumping capability. Heat from attached devices such as integrated circuits evaporates working fluid in the heat pipe. The vapor cools and condenses on a heat dissipation surface. The condensate collects in the wick structure, where capillary pumping returns the fluid to high heat areas.

Adkins, Douglas Ray (Albuquerque, NM); Shen, David S. (Albuquerque, NM); Tuck, Melanie R. (Albuquerque, NM); Palmer, David W. (Albuquerque, NM); Grafe, V. Gerald (Corrales, NM)

1999-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "visible piping visible" 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

Heat pipe with embedded wick structure  

DOE Patents (OSTI)

A heat pipe has an embedded wick structure that maximizes capillary pumping capability. Heat from attached devices such as integrated circuits evaporates working fluid in the heat pipe. The vapor cools and condenses on a heat dissipation surface. The condensate collects in the wick structure, where capillary pumping returns the fluid to high heat areas. 7 figs.

Adkins, D.R.; Shen, D.S.; Tuck, M.R.; Palmer, D.W.; Grafe, V.G.

1998-06-23T23:59:59.000Z

362

Heat pipe with embedded wick structure  

SciTech Connect

A heat pipe has an embedded wick structure that maximizes capillary pumping capability. Heat from attached devices such as integrated circuits evaporates working fluid in the heat pipe. The vapor cools and condenses on a heat dissipation surface. The condensate collects in the wick structure, where capillary pumping returns the fluid to high heat areas.

Adkins, Douglas Ray (Albuquerque, NM); Shen, David S. (Albuquerque, NM); Tuck, Melanie R. (Albuquerque, NM); Palmer, David W. (Albuquerque, NM); Grafe, V. Gerald (Corrales, NM)

1998-01-01T23:59:59.000Z

363

Geothermal drill pipe corrosion test plan  

DOE Green Energy (OSTI)

Plans are presented for conducting a field test of drill pipe corrosion, comparing air and nitrogen as drilling fluids. This test will provide data for evaluating the potential of reducing geothermal well drilling costs by extending drill pipe life and reducing corrosion control costs. The 10-day test will take place during fall 1980 at the Baca Location in Sandoval County, New Mexico.

Caskey, B.C.; Copass, K.S.

1980-12-01T23:59:59.000Z

364

Hydrogen Piping Experience in Chevron Refining  

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

Piping Piping Experience in Chevron Refining Ned Niccolls Materials Engineer Chevron Energy Technology Company Hydrogen Pipeline Working Group Workshop August 30-31, 2005 Outline 2 Overall perspectives from long term use of hydrogen piping in refining. Piping specifications and practices. The (few) problem areas. Related industry work: American Petroleum Institute corrosion and materials work on high temperature hydrogen attack. Overall Perspectives 3 Few problems with hydrogen piping operating at ambient to at least 800F and pressures up to at least 3000psia as long as we stay within well- defined limits H2S contamination presents many more problems, beyond the scope of this talk We will note a couple of specific vulnerabilities Refining tracks materials performance in

365

Heat pipe nuclear reactor for space power  

SciTech Connect

A heat-pipe cooled nuclear reactor has been designed to provide 3.2 MW(t) to an out-of-core thermionic conversion system. The reactor is a fast reactor designed to operate at a nominal heat pipe temperature of 1675/sup 0/K. Each reactor fuel element consists of a hexagonal molybdenum block which is bonded along its axis to one end of a molybdenum, lithium vapor, heat pipe. The block is perforated with an array of longitudinal holes which are loaded with UO/sub 2/ pellets. The heat pipe transfers heat directly to a string of six thermionic converters which are bonded along the other end of the heat pipe. An assembly of 90 such fuel elements forms a hexagonal core. The core is surrounded by a thermal radiation shield, a thin thermal neutron absorber and a BeO reflector containing boron loaded control drums.

Koenig, D.R.

1976-01-01T23:59:59.000Z

366

Rotating heat pipe for air-conditioning  

SciTech Connect

A unique rotary hermetic heat pipe is disclosed for transferring heat from an external source to an external heat sink. The heat pipe has a tapered condensing surface which is curved preferably to provide uniform pumping acceleration, the heat pipe being rotated at a velocity such that the component of centrifugal acceleration in an axial direction parallel to the tapered surface is greater than lG and so that the condensing surface is kept relatively free of liquid at any attitude. The heat pipe may be incorporated in an air conditioning apparatus so that it projects through a small wall opening. In the preferred air conditioning apparatus, a hollow hermetic air impeller is provided which contains a liquefied gaseous refrigerant, such as freon, and means are provided for compressing the refrigerant in the evaporator region of the heat pipe.

Gray, V.H.

1976-12-28T23:59:59.000Z

367

Glass heat pipe evacuated tube solar collector  

DOE Patents (OSTI)

A glass heat pipe is adapted for use as a solar energy absorber in an evacuated tube solar collector and for transferring the absorbed solar energy to a working fluid medium or heat sink for storage or practical use. A capillary wick is formed of granular glass particles fused together by heat on the inside surface of the heat pipe with a water glass binder solution to enhance capillary drive distribution of the thermal transfer fluid in the heat pipe throughout the entire inside surface of the evaporator portion of the heat pipe. Selective coatings are used on the heat pipe surface to maximize solar absorption and minimize energy radiation, and the glass wick can alternatively be fabricated with granular particles of black glass or obsidian.

McConnell, Robert D. (Lakewood, CO); Vansant, James H. (Tracy, CA)

1984-01-01T23:59:59.000Z

368

Solar Heat-Pipe Receiver Wick Modeling  

DOE Green Energy (OSTI)

Stirling-cycle engines have been identified as a promising technology for the conversion of concentrated solar energy into usable electrical power. In previous experimented work, we have demonstrated that a heat pipe receiver can significantly improve system performance-over a directly-illuminated heater head. The design and operating conditions of a heat pipe receiver differ significantly from typical laboratory heat pipes. New wick structures have been developed to exploit the characteristics of the solar generation system. Typically, these wick structures allow vapor generation within the wick. Conventional heat pipe models do not handle this enhancement yet it can more than double the performance of the wick. In this study, I develop a steady-state model of a boiling-enhanced wick for a solar heat pipe receiver. The model is used for design-point calculations and is written in FORTRAN90. Some limited comparisons have been made with actual test data.

Andraka, C.E.

1998-12-21T23:59:59.000Z

369

Heat pipe reactors for space power applications  

SciTech Connect

A family of heat pipe reactors design concepts has been developed to provide heat to a variety of electrical conversion systems. Three power plants are described that span the power range 1-500 kW(e) and operate in the temperature range 1200 to 1700/sup 0/K. The reactors are fast, compact, heat-pipe cooled, high-temperature nuclear reactors fueled with fully enriched refractory fuels, UC-ZrC or UO/sub 2/. Each fuel element is cooled by an axially located molybdenum heat pipe containing either sodium or lithium vapor.

Koenig, D.R.; Ranken, W.A.; Salmi, E.W.

1977-01-01T23:59:59.000Z

370

Heat pipe testing program test plan  

SciTech Connect

A test plan is given which describes the tests to be conducted on several typical solar receiver heat pipes. The hardware to be used, test fixtures and rationale of the test program are discussed. The program objective is to perform life testing under simulated receiver conditions, and to conduct performance tests with selected heat pipes to further map their performance, particularly with regard to their transient behavior. Performance requirements are defined. Test fixtures designed for the program are described in detail, and their capabilities for simulating the receiver conditions and their limitations are discussed. The heat pipe design is given. (LEW)

Bienert, W.B.

1980-03-14T23:59:59.000Z

371

New and Underutilized Technology: Wrap Around Heat Pipes  

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

The following information outlines key deployment considerations for wrap around heat pipes within the Federal sector.

372

Dry Pipe Sprinkler Piping Replacement Project (4588), 4/30/2012  

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

Pipe System Sprinkler Piping Replacement Projects (4588) Pipe System Sprinkler Piping Replacement Projects (4588) Program or Field Office: Y-12 Site Office Location(s) (City/County/State): Oak Ridge, Anderson County, Tennessee Proposed Action Description: Submit by E-mail The proposed action is to replace sections of dry pipe system sprinkler piping which include heads, hangers, fittings, and valves. Categorical Exclusion(s) Applied: 81.3- Routine maintenance For the complete DOE National Environmental Policy Act regulations regarding categorical exclusions, including the full text of each categorical exclusion, see Subpart D of I 0 CFR Part I 021. Regulatory Requirements in 10 CFR 1021.410(b): (See full text in regulation) [{Jrhe proposal fits within a class of actions that is listed in Appendix A orB to 10 CFR Part 1021, Subpart D.

373

Corrosion of Buried Steel Pipes Used With Transmission Pipe-Type Cable Systems  

Science Conference Proceedings (OSTI)

Although pipe-type underground transmission cables were designed with a life expectancy of 40 years, many of these cables have reached this threshold and are still performing satisfactorily. The buried steel pipes that surround the cables are protected by coatings and cathodic-protection systems. These protective systems need to be routinely inspected and maintained in order to extend their own life expectancy and thereby protect the cables within the steel pipes. This report provides research results an...

2010-12-23T23:59:59.000Z

374

Fossil Plant High Energy Piping Damage: Theory and Practice  

Science Conference Proceedings (OSTI)

Condition assessment programs for high-energy piping systems are often a major aspect of a fossil utility's inspection and maintenance program. In the past 30 years, a number of major failures of fossil high-energy piping have been associated with flow-accelerated corrosion of feedwater piping, creep failures of longitudinal seam-welded hot reheat and main steam piping, and corrosion fatigue failures of cold reheat steam piping. In addition to these well-documented failures, most utilities experience fai...

2007-11-29T23:59:59.000Z

375

Fossil Plant High-Energy Piping Damage: Theory and Practice  

Science Conference Proceedings (OSTI)

Condition assessment programs for high-energy piping systems are often a major aspect of a fossil utility's inspection and maintenance program. In the past 30 years, a number of major failures of fossil high-energy piping have been associated with flow-accelerated corrosion of feedwater piping, creep failures of longitudinal seam-welded hot reheat and main steam piping, and corrosion fatigue failures of cold reheat steam piping. In addition to these well-documented failures, most utilities experience fai...

2007-06-26T23:59:59.000Z

376

Dehumidifying Heat Pipes | Department of Energy  

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

Dehumidifying Heat Pipes Dehumidifying Heat Pipes Dehumidifying Heat Pipes June 24, 2012 - 4:32pm Addthis In order to make a room comfortable in hot, humid climates, an air conditioner must lower the indoor humidity level as well as the air temperature. If an air conditioner fails to lower the humidity adequately, the air will be cool, but will feel uncomfortably damp. Inappropriately sized air conditioners are prone to this problem; large units quickly cool the air, but cycle off before they can properly dehumidify it. In extremely humid climates, even correctly sized air conditioning equipment could fail to maintain a home at a comfortable humidity level. One technology that addresses this problem is the dehumidifying heat pipe, a device that enables an air conditioner to dehumidify better and still

377

Heat pipe effect in porous medium  

SciTech Connect

In this thesis a parametric study of the thermal and hydrologic characteristics of the fractured porous tuffs at Yucca Mountain, Nevada was conducted. The effects of different fracture and matrix properties including permeability, thermal conductivity, specific heat, porosity, and tortuosity on heat pipe performance in the vicinity of the waste package were observed. Computer simulations were carried out using TOUGH code on a Cray YMP-2 supercomputer. None of the fracture parameters affected the heat pipe performance except the mobility of the liquid in the fracture. Matrix permeability and thermal conductivity were found to have significant effect on the heat pipe performance. The effect of mass injection was studied for liquid water and air injected at the fracture boundary. A high rate of mass injection was required to produce any effect on the heat pipe. The fracture-matrix equilibrium is influenced by the matrix permeability and the matrix thermal conductivity.

Joseph, M.

1992-12-01T23:59:59.000Z

378

M-25, BUTT WELDS IN PROCESS PIPING  

SciTech Connect

Metal-arc and inert-gas shielded tungsten-arc processes were compared for circumferential butt welding of austenitic stainless steel process pipe. Inert-gas tungsten-arc welding was superior to other techniques. (C.J.G.)

Litman, A.P.

1958-07-10T23:59:59.000Z

379

Heat pipe dehumidification for supermarket energy savings  

E-Print Network (OSTI)

This thesis examines the possibility of using a heat pipe installed in the air conditioning unit of a supermarket to increase the level of dehumidification of the inside air. This dehumidification is expected to reduce the ...

Oliver, Eric M. (Eric Michael)

1994-01-01T23:59:59.000Z

380

Reliability Estimation for Double Containment Piping  

Science Conference Proceedings (OSTI)

Double walled or double containment piping is considered for use in the ITER international project and other next-generation fusion device designs to provide an extra barrier for tritium gas and other radioactive materials. The extra barrier improves confinement of these materials and enhances safety of the facility. This paper describes some of the design challenges in designing double containment piping systems. There is also a brief review of a few operating experiences of double walled piping used with hazardous chemicals in different industries. This paper recommends approaches for the reliability analyst to use to quantify leakage from a double containment piping system in conceptual and more advanced designs. The paper also cites quantitative data that can be used to support such reliability analyses.

L. Cadwallader; T. Pinna

2012-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "visible piping visible" 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

Aerogel Impregnated Polyurethane Piping and Duct Insulation  

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

Aerogel Impregnated Polyurethane Piping and Duct Insulation David M. Hess InnoSense LLC david.hess@innosense.us, 310-530-2011 April 4, 2013 2 | Building Technologies Office...

382

Aerogel Impregnated Polyurethane Piping and Duct Insulation  

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

Aerogel Impregnated Polyurethane Aerogel Impregnated Polyurethane Piping and Duct Insulation David M. Hess InnoSense LLC david.hess@innosense.us, 310-530-2011 April 4, 2013 2 | Building Technologies Office eere.energy.gov Purpose & Objectives Problem Statement: Develop an efficient insulation system that will adhere to housing duct work and pipe structures while conforming to complex geometries. New insulations must increase the R-value of existing materials and be easy to apply or retrofit to existing structures.

383

Dynamic simulation recalls condensate piping event  

Science Conference Proceedings (OSTI)

This article describes how experience gained from simulating and reconstructing a condensate piping event will be used by Consolidated Edison to analyze control system problems. A cooperative effort by Con Edison and the Chemical Engineering Department at Polytechnic University used modular modeling system to investigate the probable cause of a Con Edison condensate piping event. Con Edison commissioned the work to serve as a case study for the more general problem of control systems analysis using dynamic simulation and MMS.

Farrell, R.J.; Reneberg, K.O. (Polytechnic Univ., Brooklyn, NY (United States)); Moy, H.C. (Consolidated Edison Co., New York, NY (United States))

1994-05-01T23:59:59.000Z

384

Seismic analysis of piping with nonlinear supports  

Science Conference Proceedings (OSTI)

The modeling and results of nonlinear time-history seismic analyses for three sizes of pipelines restrained by mechanical snubbes are presented. Numerous parametric analyses were conducted to obtain sensitivity information which identifies relative importance of the model and analysis ingredients. Special considerations for modeling the pipe clamps and the mechanical snubbers based on experimental characterization data are discussed. Comparisions are also given of seismic responses, loads and pipe stresses predicted by standard response spectra methods and the nonlinear time-history methods.

Barta, D.A.; Huang, S.N.; Severud, L.K.

1980-01-01T23:59:59.000Z

385

DEVELOPMENT OF TECHNOLOGY TO REMOTELY NAVIGATE VERTICAL PIPE ARRAYS  

Science Conference Proceedings (OSTI)

Situations exist around the Savannah River Site (SRS) and the Department of Energy (DOE) complex where it is advantageous to remotely navigate vertical pipe arrays. Specific examples are waste tanks in the SRS Tank Farms, which contain horizontal cooling coils at the tank bottom, vertical cooling coils throughout and a limited number of access points or ''risers''. These factors limit accessibility to many parts of these tanks by conventional means. Pipe Traveler technology has been developed to address these issues. The Pipe Traveler addresses these issues by using the vertical cooling coils as its medium of travel. The unit operates by grabbing a pipe using dual grippers located on either side of the equipment. Once securely attached to the pipe a drive wheel is extended to come in contact with the pipe. Rotation of the drive wheel causes the unit to rotate around the pipe. This action is continued until the second set of grippers is aligned with the next pipe. Extension pistons are actuated to extend the second set of grippers in contact with a second pipe. The second set of grippers is then actuated to grasp the pipe. The first set of grippers releases the original pipe and the process is repeated until the unit reaches its desired location. Once at the tool deployment location the desired tool may be used. The current design has proven the concept of pipe-to-pipe navigation. Testing of the Pipe Traveler has proven its ability to transfer itself from one pipe to another.

Krementz, D.; Immel, D.; Vrettos, N.; Nance, T.; Marzolf, A.

2011-07-01T23:59:59.000Z

386

Conceptual design of a heat pipe radiator  

SciTech Connect

A conceptual design of a waste heat radiator has been developed for a thermoelectric space nuclear power system. The basic shape of the heat pipe radiator was a frustum of a right circular cone. The design included stringer heat pipes to carry reject heat from the thermoelectric modules to the radiator skin that was composed of small-diameter, thin-walled cross heat pipes. The stringer heat pipes were armored to resist puncture by a meteoroid. The cross heat pipes were designed to provide the necessary unpunctured radiating area at the mission end with a minimum initial system mass. Several design cases were developed in which the individual stringer survival probabilities were varied and the radiator system mass was calculated. Results are presented for system mass as a function of individual stringer survival probability for six candidate container materials, three candidate heat pipe fluids, two radiator operating temperatures, two meteoroid shield types, and two radiating surface cases. Results are also presented for radiator reject heat as a function of system mass, area, and length for three system sizes.

Bennett, G.A.

1977-09-01T23:59:59.000Z

387

Primary Piping Static Test Design Request  

SciTech Connect

It is requested that a design be initiated for the primary piping static test. This test is necessary to provide information as to the reliability of the pipe subjected to reactor operating conditions. The test conditions are as follows: temperature - 2000 F (isothermal), pressure effective - 42 psi, and test time - 10,000 hours. It will be necessary to test two sizes of pipe as shown on the preliminary piping layout (2.250-inch O.D. x .095-inch wall and 3 1/2 SCH. 10 pipe). The test specimens shall be jacketed in an inconel containment vessel. The test rig should be similar to the design of the 4-inch pressure vessels (T-1030244). In addition an outer containment vessel constructed of stainless steel must be provided around the clam shell heaters and the inconel containment vessel. This is to provide an inert atmosphere for the inconel vessel. Provisions should be made in the design for a 1/4-inch clad thermocouple. It is planned to use the pipe test as a vehicle for studying experimental Tc's (Cb-Mo and W-W.26% Re).

O' Brien, R.W.

1961-11-30T23:59:59.000Z

388

Fundamental heat transfer experiments of heat pipes for turbine cooling  

SciTech Connect

Fundamental heat transfer experiments were carried out for three kinds of heat pipes that may be applied to turbine cooling in future aero-engines. In the turbine cooling system with a heat pipe, heat transfer rate and start-up time of the heat pipe are the most important performance criteria to evaluate and compare with conventional cooling methods. Three heat pipes are considered, called heat pipe A, B, and C, respectively. All heat pipes have a stainless steel shell and nickel sintered powder metal wick. Sodium (Na) was the working fluid for heat pipes A and B; heat pipe C used eutectic sodium-potassium (NaK). Heat pipes B and C included noncondensible gas for rapid start-up. There were fins on the cooling section of heat pipes. In the experiments, an infrared image furnace supplied heat to the heat pipe simulating turbine blade surface conditions. In the results, heat pipe B demonstrated the highest heat flux of 17 to 20 W/cm{sup 2}. The start-up time was about 6 minutes for heat pipe B and about 6 minutes for heat pipe A. Thus, adding noncondensible gas effectively reduced start-up time. Although NaK is a liquid phase at room temperature, the start-up time of heat pipe C (about 7 to 8 minutes) was not shorter than the heat pipe B. The effect of a gravitational force on heat pipe performance was also estimated by inclining the heat pipe at an angle of 90 deg. There was no significant gravitational dependence on heat transport for heat pipes including noncondensible gas.

Yamawaki, S. [Ishikawajima-Harima Heavy Industries Co., Ltd., Tokyo (Japan); Yoshida, T.; Taki, M.; Mimura, F. [National Aerospace Lab., Tokyo (Japan)

1998-07-01T23:59:59.000Z

389

A Temperature-Profile Method for Estimating Flow Processes in Geologic Heat Pipes  

E-Print Network (OSTI)

change and capillarity—the heat pipe effect, Int. J. Heatgeothermal reservoirs as heat pipes in fractured porousProcesses in Geologic Heat Pipes Jens T. Birkholzer Ernest

Birkholzer, Jens T.

2004-01-01T23:59:59.000Z

390

Building Energy Software Tools Directory: Pipe-Flo  

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

Pipe-Flo Pipe-Flo Pipe-flo logo Flow analysis software used to design, optimize, troubleshoot and simulate the operation of piping systems of any size or configuration. PIPE-FLO provides a total picture of the piping system including the flow and pressures in pipelines, along with the interaction of pumps, control valves, and flow meters. PIPE-FLO products are used worldwide in a variety of applications throughout many industries including HVAC, fire sprinkler, wastewater collection and treatment, mining, ultra-pure water, chemical processing, power generation, pulp & paper and general industrial. Screen Shots Keywords piping analysis, pump selection, piping design, hydraulic analysis, pump sizing, pressure drop calculator, hydraulic modeling, steam distribution,

391

Apparatus and method for detecting leaks in piping  

DOE Patents (OSTI)

A method and device are disclosed for detecting the location of leaks along a wall or piping system, preferably in double-walled piping. The apparatus comprises a sniffer probe, a rigid cord such as a length of tube attached to the probe on one end and extending out of the piping with the other end, a source of pressurized air and a source of helium. The method comprises guiding the sniffer probe into the inner pipe to its distal end, purging the inner pipe with pressurized air, filling the annulus defined between the inner and outer pipe with helium, and then detecting the presence of helium within the inner pipe with the probe as is pulled back through the inner pipe. The length of the tube at the point where a leak is detected determines the location of the leak in the pipe. 2 figures.

Trapp, D.J.

1994-12-27T23:59:59.000Z

392

Modeling of pulsating heat pipes.  

SciTech Connect

This report summarizes the results of a computer model that describes the behavior of pulsating heat pipes (PHP). The purpose of the project was to develop a highly efficient (as compared to the heat transfer capability of solid copper) thermal groundplane (TGP) using silicon carbide (SiC) as the substrate material and water as the working fluid. The objective of this project is to develop a multi-physics model for this complex phenomenon to assist with an understanding of how PHPs operate and to be able to understand how various parameters (geometry, fill ratio, materials, working fluid, etc.) affect its performance. The physical processes describing a PHP are highly coupled. Understanding its operation is further complicated by the non-equilibrium nature of the interplay between evaporation/condensation, bubble growth and collapse or coalescence, and the coupled response of the multiphase fluid dynamics among the different channels. A comprehensive theory of operation and design tools for PHPs is still an unrealized task. In the following we first analyze, in some detail, a simple model that has been proposed to describe PHP behavior. Although it includes fundamental features of a PHP, it also makes some assumptions to keep the model tractable. In an effort to improve on current modeling practice, we constructed a model for a PHP using some unique features available in FLOW-3D, version 9.2-3 (Flow Science, 2007). We believe that this flow modeling software retains more of the salient features of a PHP and thus, provides a closer representation of its behavior.

Givler, Richard C.; Martinez, Mario J.

2009-08-01T23:59:59.000Z

393

Heat pipes for use in a magnetic field  

DOE Patents (OSTI)

A heat pipe configuration is described for use in a magnetic field environment of a fusion reactor. Heat pipes for operation in a magnetic field when liquid metal working fluids are used are optimized by flattening of the heat pipes having an unobstructed annulus which significantly reduces the adverse side region effect of the prior known cylindrically configured heat pipes. The flattened heat pipes operating in a magnetic field can remove 2 to 3 times the heat as a cylindrical heat pipe of the same cross sectional area.

Werner, R.W.; Hoffman, M.A.

1981-04-29T23:59:59.000Z

394

Heat pipes for use in a magnetic field  

DOE Patents (OSTI)

A heat pipe configuration for use in a magnetic field environment of a fusion reactor is disclosed. Heat pipes for operation in a magnetic field when liquid metal working fluids are used are optimized by flattening of the heat pipes having an unobstructed annulus which significantly reduces the adverse side region effect of the prior known cylindrically configured heat pipes. The flattened heat pipes operating in a magnetic field can remove 2--3 times the heat as a cylindrical heat pipe of the same cross sectional area. 4 figs.

Werner, R.W.; Hoffman, M.A.

1983-07-19T23:59:59.000Z

395

Heat pipes for use in a magnetic field  

DOE Patents (OSTI)

A heat pipe configuration for use in a magnetic field environment of a fusion reactor. Heat pipes for operation in a magnetic field when liquid metal working fluids are used are optimized by flattening of the heat pipes having an unobstructed annulus which significantly reduces the adverse side region effect of the prior known cylindrically configured heat pipes. The flattened heat pipes operating in a magnetic field can remove 2--3 times the heat as a cylindrical heat pipe of the same cross sectional area.

Werner, Richard W. (San Ramon, CA); Hoffman, Myron A. (Davis, CA)

1983-01-01T23:59:59.000Z

396

Corrugated Pipe as a Beam Dechirper  

SciTech Connect

We have studied the use of a metallic pipe with small corrugations for the purpose of passively dechirping, through its wakefield, a short, intense electron bunch. The corrugated pipe is attractive for this purpose because its wake: (i) has near maximal possible amplitude for a given aperture and (ii) has a relatively large oscillation wave length, even when the aperture is small. We showed how the corrugated structure can satisfy dechirping requirements encountered in the NGLS project at LBNL. We found that a linear chirp of -40 MeV/mm can be induced by an NGLS-like beam, by having it pass through a corrugated, metallic pipe of radius 3 mm, length 8.2 m, and corrugation parameters full depth 450 {mu}m and period 1000 {mu}m. This structure is about 15 times as effective in the role of dechirper as an S-band accelerator structure used passively.

Bane, K.L.F.; Stupakov, G.; /SLAC

2012-04-20T23:59:59.000Z

397

Industrial Waste Heat Recovery Using Heat Pipes  

E-Print Network (OSTI)

For almost a decade now, heat pipes with secondary finned surfaces have been utilized in counter flow heat exchangers to recover sensible energy from industrial exhaust gases. Over 3,000 such heat exchangers are now in service, recovering an estimated energy equivalent of nearly 1.1 million barrels of oil annually. Energy recovered by these units has been used to either preheat process supply air or to heat plant comfort make-up air. Heat pipe heat exchangers have been applied to an ever-expanding variety of industrial processes. One notable application in recent years has been for combustion airs preheat of fired heaters in petroleum refineries and petrochemical plants. Another recent development has been a waste heat recovery boiler using heat pipes. This device has a number of advantageous features. Field operational experience of several units in service has been excellent.

Ruch, M. A.

1981-01-01T23:59:59.000Z

398

Neutron imaging of alkali metal heat pipes  

Science Conference Proceedings (OSTI)

High-temperature heat pipes are two-phase, capillary driven heat transfer devices capable of passively providing high thermal fluxes. Such a device using a liquid-metal coolant can be used as a solution for successful thermal management on hypersonic flight vehicles. Imaging of the liquid-metal coolant inside will provide valuable information in characterizing the detailed heat and mass transport. Neutron imaging possesses an inherent advantage from the fact that neutrons penetrate the heat pipe metal walls with very little attenuation, but are significantly attenuated by the liquid metal contained inside. Using the BT-2 beam line at the National Institute of Standards and Technology (NIST) in Gaithersburg, Maryland, preliminary efforts have been conducted on a nickel-sodium heat pipe. The contrast between the attenuated beam and the background is calculated to be approximately 3%. This low contrast requires sacrifice in spatial or temporal resolution so efforts have since been concentrated on lithium (Li) which has a substantially larger neutron attenuation cross section. Using the CG-1D beam line at the High Flux Isotope Reactor (HFIR) of Oak Ridge National Laboratory (ORNL) in Oak Ridge, Tennessee, the first neutron images of high-temperature molybdenum (Mo)-Li heat pipes have been achieved. The relatively high neutron cross section of Li allows for the visualization of the Li working fluid inside the heat pipes. The evaporator region of a gravity assisted cylindrical heat pipe prototype 25 cm long was imaged from start-up to steady state operation up to approximately 900 C. In each corner of the square bore inside, the capillary action raises the Li meniscus above the bulk Li pool in the evaporator region. As the operational temperature changes, the meniscus shapes and the bulk meniscus height also changes. Furthermore, a three-dimensional tomographic image is also reconstructed from the total of 128 projection images taken 1.4o apart in which the Li had already cooled and solidified.

Kihm, Ken [University of Tennessee, Knoxville (UTK); Kirchoff, Eric [University of Tennessee, Knoxville (UTK); Golden, Matt [University of Tennessee, Knoxville (UTK); Rosenfeld, J. [Thermacore Inc.; Rawal, S. [Lockheed Martin Space Systems Company; Pratt, D. [United States Air Force Research Laboratory, Wright-Patterson Air Force Base; Bilheux, Hassina Z [ORNL; Walker, Lakeisha MH [ORNL; Voisin, Sophie [ORNL; Hussey, Dan [NIST Center for Neutron Research (NCRN), Gaithersburg, MD

2013-01-01T23:59:59.000Z

399

FRAME LOSS VISIBILITY MODELING OF STEREOSCOPIC VIDEO FOR H.264/AVC-MVC Arash Vosoughi and Pamela C. Cosman  

E-Print Network (OSTI)

and Optoelectronics (SOPO), Aug. 2009, pp. 1­4. [5] A. Vetro, T. Wiegand, and G.J. Sullivan, "Overview of the stereo

Cosman, Pamela C.

400

Ground-Based Observations and Modeling of the Visibility and Radar Reflectivity in a Radiation Fog Layer  

Science Conference Proceedings (OSTI)

The development of a radiation fog layer at the Cabauw Experimental Site for Atmospheric Research (51.97°N, 4.93°E) on 23 March 2011 was observed with ground-based in situ and remote sensing observations to investigate the relationship between ...

R. Boers; H. Klein Baltink; H. J. Hemink; F. C. Bosveld; M. Moerman

2013-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "visible piping visible" 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

Characterizing Exoplanets in the Visible and Infrared: A Spectrometer Concept for the EChO Space Mission  

E-Print Network (OSTI)

Transit-spectroscopy of exoplanets is one of the key observational techniques to characterize the extrasolar planet and its atmosphere. The observational challenges of these measurements require dedicated instrumentation and only the space environment allows an undisturbed access to earth-like atmospheric features such as water or carbon-dioxide. Therefore, several exoplanet-specific space missions are currently being studied. One of them is EChO, the Exoplanet Characterization Observatory, which is part of ESA's Cosmic Vision 2015-2025 program, and which is one of four candidates for the M3 launch slot in 2024. In this paper we present the results of our assessment study of the EChO spectrometer, the only science instrument onboard this spacecraft. The instrument is a multi-channel all-reflective dispersive spectrometer, covering the wavelength range from 400 nm to 16 microns simultaneously with a moderately low spectral resolution. We illustrate how the key technical challenge of the EChO mission - the high...

Glauser, A M; Krause, O; Henning, Th; Benneke, B; Bouwman, J; Cubillos, P E; Crossfield, I J M; Detre, Ö H; Ebert, M; Grözinger, U; Güdel, M; Harrington, J; Justtanont, K; Klaas, U; Lenzen, R; Madhusudhan, N; Meyer, M R; Mordasini, C; Müller, F; Ottensamer, R; Plesseria, J -Y; Quanz, S P; Reiners, A; Renotte, E; Rohloff, R -R; Scheithauer, S; Schmid, H M; Schrader, J -R; Seemann, U; Stam, D; Vandenbussche, B; Wehmeier, U

2013-01-01T23:59:59.000Z

402

The Impact of Mesoscale Convective Systems on Regional Visibility and Oxidant Distributions during Persistent Elevated Pollution Episodes  

Science Conference Proceedings (OSTI)

It is generally accepted that atmospheric pollutants can be transported over distances described as synoptic in scale. However, the redistribution and removal of the various pollutant species may be significantly influenced, often in a highly ...

Walter A. Lyons; Rebecca H. Calby; Cecil S. Keen

1986-11-01T23:59:59.000Z

403

A new image database for 3D/2D registration based on the visible human data set  

Science Conference Proceedings (OSTI)

Before an image registration method can be used in the medical theater a rigorous performance assessment of the registration method must be performed. In this paper, a new image database with a reference-based standardized evaluation methodology for ...

Primož Markelj; Boštjan Likar; Franjo Pernuš

2010-07-01T23:59:59.000Z

404

A historical interpretation of the study of the visible cloud morphology on the planet Jupiter: 1610-1878  

Science Conference Proceedings (OSTI)

The majority of the literature discussing the perceived physical appearance of Jupiter published prior to 1878 has been examined in order to determine to what extent observations were biased by technical limitations and preconceptions of their day and, in lieu of these, how useful this body of work is in characterizing the behavior of the Jovian upper atmosphere over the last three hundred years. The biographies of the historical observers; their instrumentation, available viewing conditions, and observational techniques; their means of communication with their fellows; and the primary interpretive references available to their libraries have been investigated in order to attempt to explain discrepancies and agreement between what was reported in pre-photographic times and what is presently seen. It has been found that nearly all of the prominent feature-types found on Jupiter today existed during the nineteenth century and, in some cases, earlier. The longevity and frequency of the appearance of features can not be accurately determined from the time before objective surveys of the planet were organized. This is because, during each apparition of Jupiter, nonprofessional part-time observers, working independently chose to use their finite time and resources to follow the progress of specific discoveries on its disk to the exclusion of the rest of the planet.

Hockey, T.A.

1988-01-01T23:59:59.000Z

405

Overcoming Visibility Issues in a Small-to-Medium Retailer Using Automatic Identification and Data Capture Technology: An Evolutionary Approach  

Science Conference Proceedings (OSTI)

In this paper, the authors the inventory control practices of a small-to-medium retailer to identify common challenges this type of organization experiences with respect to automated data capture ADC and the implementation of an enterprise wide information ... Keywords: Automatic Identification and Data Capture AIDC, Barcode, Business Process, Information Systems, Inventory Control, Radio-Frequency Identification RFID, Small-to-Medium Retailer

Dane Hamilton; Katina Michael; Samuel Fosso Wamba

2010-04-01T23:59:59.000Z

406

New Physics at the Tevatron and the LHC May Relate to Dark Matter Visible in UHE Cosmic Rays  

E-Print Network (OSTI)

A two flavor color sextet quark sector added to QCD yields the {\\it uniquely} unitary Critical Pomeron at high energy while also producing electroweak symmetry breaking. In this paper it is argued that a number of experimental phenomena in Cosmic Ray and hadron collider physics can be interpreted as evidence for the sextet sector. These phenomena include (1) Top quark production is via the eta_6 sextet quark pseudoscalar resonance - interference with the background will produce an asymmetry. (2) Longitudinal Z pairs, produced as sextet pions, provide a high mass excess cross-section that includes the eta_6 at the t-tbar threshold mass. Combining the sextet sector and the electroweak interaction without short-distance anomalies requires QUD - a unique underlying weak coupling massless SU(5) gauge theory. Remarkably, it appears that the Standard Model might be reproduced (in a radical conceptual change) by the QUD bound-state S-Matrix. Infra-red divergent gauge bosons coupled to massless fermion anomalies produce a "wee parton vacuum" that confines the elementary fermions. All S-Matrix particles have dynamically generated masses, with sextet baryons as the only new particles - beyond the Standard Model. Anomaly color factors produce large sextet amplitudes and there is no Higgs boson.

Alan. R. White

2011-06-28T23:59:59.000Z

407

Dark Matter May be Strongly Visible in UHE Cosmic Rays and Related New Physics May be Appearing at the LHC  

E-Print Network (OSTI)

A two flavor color sextet quark sector added to QCD yields the {\\it uniquely} unitary Critical Pomeron at high energy while also producing electroweak symmetry breaking. In this paper it is argued that a number of experimental phenomena in Cosmic Ray and hadron collider physics can be interpreted as evidence for the sextet sector, as follows. 1. The majority of UHE cosmic rays are Dark Matter sextet neutrons. 2. The cosmic ray spectrum knee is a production threshold for sextet states. 3. The enhancement of high multiplicities and small pT at the LHC is related to a sextet generated triple pomeron coupling. 4. Tevatron and LHC events containing a Z pair and a high multiplicity of small pT particles are associated with sextet electroweak symmetry breaking. 5. Top quark production is via the $\\eta_6$ sextet quark pseudoscalar resonance - interference with the background will produce an asymmetry. 6. Enhanced W pair production would produce an excess in the W + dijet cross-section. Combining the sextet sector and...

White, Alan R

2011-01-01T23:59:59.000Z

408

Visible Light Digital Camera --Up to 2.3MP resolution with LED lamps provides sharp images  

E-Print Network (OSTI)

regardless of lighting conditions · Fusion Picture in Picture (PIP) -- Displays thermal image super Marker Function · Auto Hot/Cold spot marker function shows a spot within the area that automatically finds the hottest or coldest spot within the box i-Series Features FLIR i60 -- Scalable Fusion picture

Short, Daniel

409

Savings Project: Insulate Hot Water Pipes for Energy Savings...  

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

the insulation done during new construction of a home, during other work on your water heater or pipes, or insulating the pipes yourself, is well worth the effort. In special...

410

Savings Project: Insulate Hot Water Pipes for Energy Savings | Department  

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

Insulate Hot Water Pipes for Energy Savings Insulate Hot Water Pipes for Energy Savings Savings Project: Insulate Hot Water Pipes for Energy Savings Addthis Project Level Medium Energy Savings $8-$12 annually Time to Complete 3 hours for a small house Overall Cost $10-$15 Insulating water pipes can save you water, energy, and money. | Photo courtesy of iStockphoto.com/nsj-images Insulating water pipes can save you water, energy, and money. | Photo courtesy of iStockphoto.com/nsj-images Insulating your hot water pipes reduces heat loss and can raise water temperature 2°F-4°F hotter than uninsulated pipes can deliver, allowing for a lower water temperature setting. You also won't have to wait as long for hot water when you turn on a faucet or showerhead, which helps conserve water. Paying for someone to insulate your pipes-as a project on its own-may

411

High temperature heat pipe experiments in low earth orbit  

SciTech Connect

Although high temperature, liquid metal heat pipe radiators have become a standard component on most high power space power system designs, there is no experimental data on the operation of these heat pipes in a zero gravity or micro-gravity environment. Experiments to benchmark the transient and steady state performance of prototypical heat pipe space radiator elements are in preparation for testing in low earth orbit. It is anticipated that these heat pipes will be tested aborad the Space Shuttle in 1995. Three heat pipes will be tested in a cargo bay Get Away Special (GAS) canister. The heat pipes are SST/potassium, each with a different wick structure; homogeneous, arterial, and annular gap, the heat pipes have been designed, fabricated, and ground tested. In this paper, the heat pipe designs are specified, and transient and steady-state ground test data are presented.

Woloshun, K.; Merrigan, M.A.; Sena, J.T. (Los Alamos National Lab., NM (United States)); Critchley, E. (Phillips Lab., Kirtland AFB, NM (United States))

1993-01-01T23:59:59.000Z

412

Application of Heat Pipes to the ATSF Spacecraft  

SciTech Connect

The Applications Technology Satellite (ATS) heat pipe program is an extensive effort requiring the fabrication and testing of more than 300 flight qualified heat pipes. The spacecraft itself contains 55 heat pipes in three configurations and 13 sizes. The design selected for ATS was an axially groved 6061 aluminum-ammonia heat pipe. Several developmental programs and extensive testing, including individual heat pipes, heat pipes bonded into honeycomb panels, and a large number of life tests, were included within the overall effort. Results are presented for the thermal modeling of the heat pipes with the spacecraft. Results of thermal-vacuum testing of a thermal structural model and sounding rocket testing of the ATS axially grooved pipe are also discussed. Several problems including hydrogen gas generation, were encountered during the course of the program. The steps taken to solve these problems may be applicable to future programs.

Berger, M.E.; Kelly, W.H.

1973-01-01T23:59:59.000Z

413

High temperature heat pipe experiments in low earth orbit  

SciTech Connect

Although high temperature, liquid metal heat pipe radiators have become a standard component on most high power space power system designs, there is no experimental data on the operation of these heat pipes in a zero gravity or micro-gravity environment. Experiments to benchmark the transient and steady state performance of prototypical heat pipe space radiator elements are in preparation for testing in low earth orbit. It is anticipated that these heat pipes will be tested aborad the Space Shuttle in 1995. Three heat pipes will be tested in a cargo bay Get Away Special (GAS) canister. The heat pipes are SST/potassium, each with a different wick structure; homogeneous, arterial, and annular gap, the heat pipes have been designed, fabricated, and ground tested. In this paper, the heat pipe designs are specified, and transient and steady-state ground test data are presented.

Woloshun, K.; Merrigan, M.A.; Sena, J.T. [Los Alamos National Lab., NM (United States); Critchley, E. [Phillips Lab., Kirtland AFB, NM (United States)

1993-02-01T23:59:59.000Z

414

Smoothing of pipe system completion processes in a shipyard environment/  

E-Print Network (OSTI)

Due to a number of different production issues, the manufacture of template pipes is often delayed. These delays hold up pipe system completion on board the ships in production and can delay payments from the Ministry of ...

Zojwalla, Shaheen J. (Shaheen Joyab), 1977-

2004-01-01T23:59:59.000Z

415

Development and Testing of Insulated Drill Pipe  

DOE Green Energy (OSTI)

This project has comprised design, analysis, laboratory testing, and field testing of insulated drill pipe (IDP). This paper will briefly describe the earlier work, but will focus on results from the recently-completed field test in a geothermal well. Field test results are consistent with earlier analyses and laboratory tests, all of which support the conclusion that insulated drill pipe can have a very significant effect on circulating fluid temperatures. This will enable the use of downhole motors and steering tools in hot wells, and will reduce corrosion, deterioration of drilling fluids, and heat-induced failures in other downhole components.

Champness, T.; Finger, J.; Jacobson, R.

1999-07-07T23:59:59.000Z

416

Heat pipe technology. Quarterly update, March 31, 1976  

SciTech Connect

Heat Pipe Technology is a continuing bibliographic summary of research on heat pipes. The first volume was published in the spring of 1971 and is cumulative through March of that year. The 1971, 1972, 1973 and 1974 Annual Supplements have been published and distributed. This update to Heat Pipe Technology cites the additional references identified during January, February and March of 1976. It is intended to provide ''current awareness'' to heat pipe researchers.

1976-01-01T23:59:59.000Z

417

Fire Testing of High-Density Polyethylene Pipe  

Science Conference Proceedings (OSTI)

The results in this report are intended to demonstrate a method that can be used to protect high-density polyethylene (HDPE) piping located aboveground from postulated fire events. This includes protecting both pipe and pipe fittings (for example, elbows, tees, and valves) from the fire environmentincluding the heat transmitted from pipe supportsand preventing the fire environment from passing through building wall or floor penetrations. The report is intended to be complementary to other ongoing Electr...

2011-08-23T23:59:59.000Z

418

Impacts of Soil and Pipe Thermal Conductivity on Performance of Horizontal Pipe in a Ground-source Heat Pump  

E-Print Network (OSTI)

In this paper the composition and thermal property of soil are discussed. The main factors that impact the soil thermal conductivity and several commonly-used pipe materials are studied. A model of heat exchanger with horizontal pipes of ground-source heat pump is developed. The impact of soil thermal conductivity and pipe thermal conductivity on the soil temperature field around the buried pipe, and the thermal performance of the heat exchanger are simulated. The simulation results show that with the increase of soil thermal conductivity, heat transfer quantity obviously increases, and the temperature of soil around pipe decrease under winter conditions. The temperature field varies relatively faster with thermal conductivity in the site nearer to the buried pipe. With the increase of pipe thermal conductivity, heat transfer quantity and the mean temperature of the buried pipe's outside surface all increase.

Song, Y.; Yao, Y.; Na, W.

2006-01-01T23:59:59.000Z

419

Gary Phetteplace August 1995 Optimal Design of Piping Systems  

E-Print Network (OSTI)

Gary Phetteplace August 1995 Optimal Design of Piping Systems for District Heating CRRELREPORT95 First, a method for determining the optimal size for a single pipe segment in a district heating system be feasible for designing the piping networks for district heating systems of moderate size, and its major

420

Testing of a sodium heat pipe  

SciTech Connect

The operation of a heat pipe with both thermal radiation and convection heat rejection has been experimentally examined. The thermal radiation heat rejection conditions are similar to those which would be experienced in a space environment. The experimental results show good agreement with the analytical model. 3 refs., 2 figs.

Holtz, R.E.

1991-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "visible piping visible" 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

Silicon heat pipes for cooling electronics  

SciTech Connect

The increasing power density of integrated circuits (ICs) is creating the need for improvements in systems for transferring heat away from the chip. In earlier investigations, diamond films were used to conduct heat from ICs and spread the energy across a heat sink. The authors` investigation has indicated that a 635 {mu}m (25 mil) thick silicon substrate with embedded heat pipes could perform this task better than a diamond film. From their study, it appears that the development of a heat-pipe heat-spreading system is both technically and commercially feasible. The major challenge for this heat-spreading system is to develop an effective wick structure to transport liquid to the heated area beneath the chip. This paper discusses the crucial design parameters for this heat-pipe system, such as the required wick properties, the material compatibility issues, and the thermal characteristics of the system. The paper also provides results from some recent experimental activities at Sandia to develop these heat-pipe heat spreader systems.

Adkins, D.R.; Shen, D.S.; Palmer, D.W.; Tuck, M.R.

1994-12-31T23:59:59.000Z

422

ASBESTOS PIPE-INSULATION REMOVAL ROBOT SYSTEM  

SciTech Connect

This final topical report details the development, experimentation and field-testing activities for a robotic asbestos pipe-insulation removal robot system developed for use within the DOE's weapon complex as part of their ER and WM program, as well as in industrial abatement. The engineering development, regulatory compliance, cost-benefit and field-trial experiences gathered through this program are summarized.

Unknown

2000-09-15T23:59:59.000Z

423

Buried Pipe Condition Assessment with Instrumented Vehicles  

Science Conference Proceedings (OSTI)

This report describes the evaluation of two technologies for the examination of buried piping in nuclear power plants. As part of this program, the electromagnetic and ultrasonic instrumented vehicles made by Hydroscope and Ucisco were used to examine two buried pipelines at the Palo Verde Nuclear Station.

2003-11-25T23:59:59.000Z

424

Passive ice freezing-releasing heat pipe  

DOE Patents (OSTI)

A heat pipe device has been developed which permits completely passive ice formation and periodic release of ice without requiring the ambient temperature to rise above the melting point of water. This passive design enables the maximum amount of cooling capacity to be stored in the tank.

Gorski, Anthony J. (Lemont, IL); Schertz, William W. (Batavia, IL)

1982-01-01T23:59:59.000Z

425

Heat pipe technology development for high temperature space radiator applications  

SciTech Connect

Technology requirements for heat pipe radiators, potentially among the lightest weight systems for space power applications, include flexible elements, and improved specific radiator performance(kg/kW). For these applications a flexible heat pipe capable of continuous operation through an angle of 180/sup 0/ has been demonstrated. The effect of bend angle on the heat pipe temperature distribution is reviewed. An analysis of lightweight membrane heat pipe radiators that use surface tension forces for fluid containment has been conducted. The design analysis of these lightweight heat pipes is described and a potential application in heat rejection systems for space nuclear power plants outlined.

Merrigan, M.A.; Keddy, E.S.; Sena, J.T.; Elder, M.G.

1984-01-01T23:59:59.000Z

426

Fossil Plant High-Energy Piping Damage: Theory and Practice  

Science Conference Proceedings (OSTI)

Condition assessment programs for high-energy piping systems are often a major aspect of a fossil utilitys inspection and maintenance program. In the past 30 years, a number of major failures of fossil high-energy piping have been associated with flow-accelerated corrosion (FAC) of feedwater piping, creep failures of longitudinal seam-welded hot reheat and main steam piping, and corrosion fatigue/thermal failures of cold reheat steam piping. In addition to these well-documented failures, most utilities e...

2008-03-27T23:59:59.000Z

427

AWSWAH - the heat pipe solar water heater  

Science Conference Proceedings (OSTI)

An all weather heat pipe solar water heater (AWSWAH) comprising a collector of 4 m/sup 2/ (43 ft/sup 2/) and a low profile water tank of 160 liters (42 gal.) was developed. A single heat pipe consisting of 30 risers and two manifolds in the evaporator and a spiral condenser was incorporated into the AWSWAH. Condensate metering was done by synthetic fiber wicks. The AWSWAH was tested alongside two conventional solar water heaters of identical dimensions, an open loop system and a closed loop system. It was found that the AWSWAH was an average of 50% more effective than the open system in the temperature range 30-90 /sup 0/C (86-194 /sup 0/F). The closed loop system was the least efficient of the three systems.

Akyurt, M.

1986-01-01T23:59:59.000Z

428

Automated welding of nuclear piping systems  

SciTech Connect

Automated welding, or more broadly, automatic and mechanized welding processes, has found a role in nuclear power plant fabrication. This role has expanded from a rare or isolated application to relatively frequent usage in the last five years. More importantly, it is envisioned that use of automated welding will be increasing at an accelerated rate as broader exposure to this technology is achieved. Among the various pipe welding processes, the only one which has been developed for mechanized and automated nuclear piping welding is the gas tungsten arc welding (GTAW) process. This development has occurred in the past 10 to 15 years through the steady improvement and commmercialization of orbiting welding heads. Improvements in GTAW power supplies, control systems, etc., have aided this commercialization but the main element and pacing item has been the welding head itself. In order to review the status of mechanized and automated nuclear pipe welding, the topics of basic process equipment, joint design, fit-up requirements, welding parameters, and producibility will be addressed. In addition, anticipated future developments in automated systems will be discussed.

Hood, D.W.

1979-01-01T23:59:59.000Z

429

Electrically heated liquid tank employing heat pipe heat transfer means  

SciTech Connect

The heating apparatus for applying heat to the interior of a chamber includes a modular, removable, electrical, heat-producing unit and a heat pipe mountable in a wall of the chamber with one end of the pipe arranged to receive heat from the electrical heat producing unit exterior of the housing and with another end of the pipe constructed and arranged to apply heat to the medium within the chamber. The heat pipe has high conductivity with a low temperature differential between the ends thereof and the heat producing unit includes an electric coil positioned about and removably secured to the one end of the heat pipe. The electric coil is embedded in a high thermal conducitivity, low electrical conductivity filler material which is surrounded by a low thermal conductivity insulating jacket and which is received around a metal core member which is removably secured to the one end of the heat pipe.

Shutt, J.R.

1978-12-26T23:59:59.000Z

430

Review of liquid metal heat pipe work at Los Alamos  

SciTech Connect

A survey of space-power related liquid metal heat pipe work at Los Alamos National Laboratory is presented. Heat pipe development at Los Alamos has been on-going since 1963. Heat pipes were initially developed for thermionic nuclear-electrical power production in space. Since then Los Alamos has developed liquid metal heat pipes for numerous applications related to high temperature systems in both the space and terrestrial environments. Some of these applications include thermionic electrical generators, thermoelectric energy conversion (both in-core and direct radiation), thermal energy storage, hypersonic vehicle leading edge cooling, and heat pipe vapor laser cells. Some of the work performed at Los Alamos has been documented in internal reports that are often little-known. A representative description and summary of progress in space-related liquid metal heat pipe technology is provided followed by a reference section citing sources where these works may be found. 53 refs.

Reid, R.S.; Merrigan, M.A.; Sena, J.T.

1990-01-01T23:59:59.000Z

431

Pipe overpack container for transuranic waste storage and shipment  

Science Conference Proceedings (OSTI)

A Pipe Overpack Container is described for transuranic waste storage and shipment. The system consists of a vented pipe component which is positioned in a vented, insulated 55 gallon steel drum. Both the vented pipe component and the insulated drum are capable of being secured to prevent the contents from leaving the vessel. The vented pipe component is constructed of 1/4 inch stainless steel to provide radiation shielding, thus allowing shipment having high Americium-241 content. Several Pipe Overpack Containers are then positioned in a type B, Nuclear Regulatory Commission (NRC) approved, container. In the current embodiment, a TRUPACT-II container was employed and a maximum of fourteen Pipe Overpack Containers were placed in the TRUPACT-II. The combination received NRC approval for the shipment and storage of transuranic waste.

Geinitz, R.R.; Thorp, D.T.; Rivera, M.A.

1999-12-07T23:59:59.000Z

432

Pipe overpack container for trasuranic waste storage and shipment  

DOE Patents (OSTI)

A Pipe Overpack Container for transuranic waste storage and shipment. The system consists of a vented pipe component which is positioned in a vented, insulated 55 gallon steel drum. Both the vented pipe component and the insulated drum are capable of being secured to prevent the contents from leaving the vessel. The vented pipe component is constructed of 1/4 inch stainless steel to provide radiation shielding. Thus, allowing shipment having high Americium-241 content. Several Pipe Overpack Containers are then positioned in a type B, Nuclear Regulatory Commission (NRC) approved, container. In the current embodiment, a TRUPACT-II container was employed and a maximum of fourteen Pipe Overpack Containers were placed in the TRUPACT-II. The combination received NRC approval for the shipment and storage of transuranic waste.

Geinitz, Richard R. (Arvada, CO); Thorp, Donald T. (Broomfield, CO); Rivera, Michael A. (Boulder, CO)

1999-01-01T23:59:59.000Z

433

Heat Pipe Technology for Energy Conservation in the Process Industry  

E-Print Network (OSTI)

Many applications for heat pipe technology have emerged in the relatively short time this technology has been known. Heat pipes incorporated in heat exchangers have been used in tens of thousands of successful heat recovery systems. These systems range from residential and commercial air-to-air heat exchangers to giant air preheaters for the process and utility industries. The heat pipe offers a unique, efficient heat transfer device that can recover valuable thermal energy resulting in reduced equipment and operating costs. Q-dot is the world leader in heat pipe technology and we have applied our expertise in engineering heat recovery products for the process industry. This paper discusses two such products, the heat pipe air preheater and waste heat recovery boiler. These heat pipe products have been used in many successful installations all over the world and some important, distinctive features of these systems will be presented.

Price, B. L. Jr.

1985-05-01T23:59:59.000Z

434

Integrated manufacturing system of high-pressure FRP pipes  

Science Conference Proceedings (OSTI)

In order to realise industrialised manufacturing of epoxy FRP pipes, the manufacturing system which can accomplish winding, internal heating curing and extraction processes by only one machine tool was developed. The winding motion control is undertaken ... Keywords: FEM, FRP pipes, blowing control, cooling control, curing control, embedded controllers, fibreglass reinforced plastics, finite element method, high-pressure pipes, integrated manufacturing, internal heating curing, motion control, simulation, thermochemical modelling, winding

Bo You; Jiazhong Xu; Xiongjian Wang

2007-11-01T23:59:59.000Z

435

Balance of Plant Corrosion -- The Buried Pipe Reference Guide  

Science Conference Proceedings (OSTI)

In 2007, EPRI conducted two workshops in which the integrity of buried pipes was identified as a significant issue for nuclear power plants. One result of the workshops was that EPRI was asked to sponsor development of a recommendations document to help plant engineers prevent and mitigate degradation and leaks in buried pipes. EPRI report 1016456, Recommendations for an Effective Program to Control the Degradation of Buried and Underground Piping and Tanks, was prepared to address that need. In 2010, EP...

2010-12-20T23:59:59.000Z

436

Remediation of Embedded Piping: Trojan Nuclear Plant Decommissioning Experience  

Science Conference Proceedings (OSTI)

Characterization, decontamination, survey, and/or removal of contaminated embedded piping can have a substantial financial impact on decommissioning projects, depending on the project approach. This report presents a discussion of the Trojan Embedded Pipe Remediation Project (EPRP) activities, including categorization and characterization of affected piping, modeling for the proposed contamination acceptance criteria, and evaluations of various decontamination and survey techniques. The report also descr...

2000-10-19T23:59:59.000Z

437

Sodium and lithium corrosion in molybdenum heat pipes  

SciTech Connect

Sodium and lithium corrosin in molybdenum heat pipes has been shown to be impurity dependent rather than solubility dependent. Impurities represent the major contributors to corrosion in the heat pipes tested. Our experiments have shown no evidence of direct solution of molybdenum by either sodium or lithium. Analysis has suggested that a critical concentration of impurities is required to initiate corrosion. Thus it appears that corrosion in Mo/Na and Mo/Li heat pipes can be controlled if impurity concentration can be limited by removal of impurities from the working fluid and heat pipe components prior to operation or by internal gettering during operation.

Lundberg, L.B.; Merrigan, M.A.

1984-01-01T23:59:59.000Z

438

Influence of Feeding Flow and Shrinkage Pipe Formation on ...  

Science Conference Proceedings (OSTI)

Presentation Title, Influence of Feeding Flow and Shrinkage Pipe Formation on ... CFD–Based Modelling on Interfacial Heat Transfer for Water Quenching.

439

Polyethylene Pipe Failure in the Arctic - Programmaster.org  

Science Conference Proceedings (OSTI)

In the current study, a new high density polyethylene (HDPE) pipe in the Arctic region of ... Heat Tint Effects on General Corrosion Resistance of Stainless Steels .

440

Nondestructive Evaluation: Ultrasonic Examination Techniques for High Density Polyethylene Pipes  

Science Conference Proceedings (OSTI)

High density polyethylene (HDPE) pipe has been used as a replacement material for buried carbon steel pipe in non-safety-related systems. Using the current butt fusion procedure that uses heat and pressure to melt and join two sections of plastic pipe, concerns have been raised that would indicate that the presence of decreased bond strength when the welding parameters for fusion set forth by the plastic pipe industry were not followed. Currently two utilities, Ameren UE at Callaway and Duke-Energy at Ca...

2011-11-15T23:59:59.000Z

Note: This page contains sample records for the topic "visible piping visible" 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

ID Cladding of Pipe Using Resistance Seam Processing  

Science Conference Proceedings (OSTI)

Recently, Edison Welding Institute as developed a new technology for cladding of such pipe. This technology incorporates a resistance seam welding approach,

442

International Piping Integrity Research Group (IPIRG) Program. Final report  

SciTech Connect

This is the final report of the International Piping Integrity Research Group (IPIRG) Program. The IPIRG Program was an international group program managed by the U.S. Nuclear Regulatory Commission and funded by a consortium of organizations from nine nations: Canada, France, Italy, Japan, Sweden, Switzerland, Taiwan, the United Kingdom, and the United States. The program objective was to develop data needed to verify engineering methods for assessing the integrity of circumferentially-cracked nuclear power plant piping. The primary focus was an experimental task that investigated the behavior of circumferentially flawed piping systems subjected to high-rate loadings typical of seismic events. To accomplish these objectives a pipe system fabricated as an expansion loop with over 30 meters of 16-inch diameter pipe and five long radius elbows was constructed. Five dynamic, cyclic, flawed piping experiments were conducted using this facility. This report: (1) provides background information on leak-before-break and flaw evaluation procedures for piping, (2) summarizes technical results of the program, (3) gives a relatively detailed assessment of the results from the pipe fracture experiments and complementary analyses, and (4) summarizes advances in the state-of-the-art of pipe fracture technology resulting from the IPIRG program.

Wilkowski, G.; Schmidt, R.; Scott, P. [and others

1997-06-01T23:59:59.000Z

443

Magnetohydrodynamic power generation, electromagnetic pumps, heat pipes, and thermionic convertors  

DOE Green Energy (OSTI)

The basic principles of operation, components, and design of MHD generators, electromagnetic pumps, heat pipes and thermionic converters are described. 66 references. (WHK)

Pierson, E.S.; Bonyhady, K.A.; Dunn, P.F.; Nathenson, R.D.; Uherka, K.L.

1984-01-01T23:59:59.000Z

444

Life Assessment Methods for Power Plant Piping and Tubing  

Science Conference Proceedings (OSTI)

...life prediction High-temperature crack growth methods ):36, Ref 35Similar to gas turbine blades, piping and tubing in steamlines, heaters,

445

Toward Active Monitoring of Piping Using Ultrasonic Guided Waves  

Science Conference Proceedings (OSTI)

Piping in nuclear power plants is exposed to severe environmental conditions so that it is very susceptible to failure caused by the growth of defects. Thus

Joon?Soo Park; Young H. Kim; Sung?Jin Song; Jae?Hee Kim; Heung?Seop Eom; Kwang?Hee Im

2004-01-01T23:59:59.000Z

446

NETL: News Release - Pipe Locating Sensor Could Help Prevent...  

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

Ceramic, Plastic and Metallic Objects DES PLAINS, IL - Successful early tests of a pipeline sensor that locates plastic, ceramic and metallic underground pipes could help reduce...

447

FEM Analysis of Pipe Reduction Forming Process for Increasing of ...  

Science Conference Proceedings (OSTI)

As a method of reducing a pipe to obtain a desired diameter, Kiuchi et al. propose a planetary ... Alloy Parts Heat Treatment Temperature Monitoring System.

448

Experimental and computational studies of loop heat pipes.  

E-Print Network (OSTI)

??Computational and experimental investigations of fluid flow and heat transfer aspects of loop heat pipes (LHPs) are presented in this thesis. The overall goal is… (more)

Atabaki, Nima.

2006-01-01T23:59:59.000Z

449

Fabrication, Filling, Sealing and Testing of Micro Heat Pipes.  

E-Print Network (OSTI)

??Micro heat pipes are small and passive heat transfer devices. Research is going on in its applications ranging from using them in high powered electronic… (more)

NADGAUDA, OMKAR

2006-01-01T23:59:59.000Z

450

Investigation of Unusual “Sharkskin” Corrosion in Drawn Copper Pipes  

Science Conference Proceedings (OSTI)

Alloy Parts Heat Treatment Temperature Monitoring System · Analysis of ... FEM Analysis of Pipe Reduction Forming Process for Increasing of Wall Thickness.

451

Heat pipe with improved wick structures  

DOE Patents (OSTI)

An improved planar heat pipe wick structure having projections formed by micromachining processes. The projections form arrays of interlocking, semi-closed structures with multiple flow paths on the substrate. The projections also include overhanging caps at their tops to increase the capillary pumping action of the wick structure. The capped projections can be formed in stacked layers. Another layer of smaller, more closely spaced projections without caps can also be formed on the substrate in between the capped projections. Inexpensive materials such as Kovar can be used as substrates, and the projections can be formed by electrodepositing nickel through photoresist masks.

Benson, David A. (Albuquerque, NM); Robino, Charles V. (Albuquerque, NM); Palmer, David W. (Albuquerque, NM); Kravitz, Stanley H. (Placitas, NM)

2000-01-01T23:59:59.000Z

452

Performance correlations for high temperature potassium heat pipes  

SciTech Connect

Potassium heat pipes designed for operation at a nominal temperature of 775K have been developed for use in a heat pipe cooled reactor design. The heat pipes operate in a gravity assist mode with a maximum required power throughput of approximately 16 kW per heat pipe. Based on a series of sub-scale experiments with 2.12 and 3.2 cm diameter heat pipes the prototypic heat pipe diameter was set at 5.7 cm with a simple knurled wall wick used in the interests of mechanical simplicity. The performance levels required for this design had been demonstrated in prior work with gutter assisted wicks and emphasis in the present work was on the attainment of similar performance with a simplified wick structure. The wick structure used in the experiment consisted of a pattern of knurled grooves in the internal wall of the heat pipe. The knurl depth required for the planned heat pipe performance was determined by scaling of wick characteristic data from the sub-scale tests. These tests indicated that the maximum performance limits of the test heat pipes did not follow normal entrainment limit predictions for textured wall gravity assist heat pipes. Test data was therefore scaled to the prototype design based on the assumption that the performance was controlled by an entrainment parameter based on the liquid flow depth in the groove structure. This correlation provided a reasonable fit to the sub-scale test data and was used in scale up of the design from the 8.0 cm/sup 2/ cross section of the largest sub-scale heat pipe to the 25.5 cm/sup 2/ cross section prototype. Correlation of the model predictions with test data from the prototype is discussed.

Merrigan, M.A.; Keddy, E.S.; Sena, J.T.

1987-01-01T23:59:59.000Z

453

Low Cost High Performance Generator Technology Program. Volume 5. Heat pipe topical, appendices  

SciTech Connect

Work performed by Dynatherm Corporation for Teledyne Isotopes during a program entitled ''Heat Pipe Fabrication, Associated Technical Support and Reporting'' is reported. The program was initiated on November 29, 1972; the main objectives were accomplished with the delivery of the heat pipes for the HPG. Life testing of selected heat pipe specimens is continuing to and beyond the present date. The program consisted of the following tasks: Heat Pipe Development of Process Definition; Prototype Heat Pipes for Fin Segment Test; HPG Heat Pipe Fabrication and Testing; Controlled Heat Pipe Life Test; and Heat Pipe Film Coefficient Determination. (TFD)

1975-07-01T23:59:59.000Z

454

Low Cost High Performance Generator Technology Program. Volume 5. Heat pipe topical, appendices  

DOE Green Energy (OSTI)

Work performed by Dynatherm Corporation for Teledyne Isotopes during a program entitled ''Heat Pipe Fabrication, Associated Technical Support and Reporting'' is reported. The program was initiated on November 29, 1972; the main objectives were accomplished with the delivery of the heat pipes for the HPG. Life testing of selected heat pipe specimens is continuing to and beyond the present date. The program consisted of the following tasks: Heat Pipe Development of Process Definition; Prototype Heat Pipes for Fin Segment Test; HPG Heat Pipe Fabrication and Testing; Controlled Heat Pipe Life Test; and Heat Pipe Film Coefficient Determination. (TFD)

Not Available

1975-07-01T23:59:59.000Z

455

The Advantages of HDPE Piping & Vaults in the  

E-Print Network (OSTI)

First in the world to produce 1600mm PE pipes Production of district heating pipes starts 1984 & telecom · Waste water treatment · House drainage · Under ground ventilation · Renovation · District heating & cooling · Special constructions · Marine intakes and outfalls · Welding, extrusion and blown

456

Integrated heat pipe-thermal storage system performance evaluation  

SciTech Connect

Performance verification tests of an integrated heat pipe-thermal energy storage system have been conducted. This system is being developed as a part of an Organic Rankine Cycle-Solar Dynamic Power System (ORC-SDPS) receiver for future space stations. The integrated system consists of potassium heat pipe elements that incorporate thermal energy storage (TES) canisters within the vapor space along with an organic fluid (toluene) heater tube used as the condenser region of the heat pipe. During the insolation period of the earth orbit, solar energy is delivered to the surface of the heat pipe elements of the ORC-SDPS receiver and is internally transferred by the potassium vapor for use and storage. Part of the thermal energy is delivered to the heater tube and the balance is stored in the TES units. During the eclipse period of the orbit, the stored energy in the TES units is transferred by the potassium vapor to the toluene heater tube. A developmental heat pipe element was fabricated that employs axial arteries and a distribution wick connecting the wicked TES units and the heater to the solar insolation surface of the heat pipe. Tests were conducted to verify the heat pipe operation and to evaluate the heat pipe/TES units/heater tube operation by interfacing the heater unit to a heat exchanger.

Keddy, E.; Sena, J.T.; Merrigan, M.

1987-01-01T23:59:59.000Z

457

Liquid metal heat pipe behavior under transient cooling and heating  

SciTech Connect

This paper describes the results of an experimental investigation of the transient behavior of a liquid metal heat pipe. A 0.457 m long, screen-wick, sodium heat pipe with 0.0127 m outer diameter was tested in sodium loop facility. The heat pipe reversed under a pulse heat load applied at the condenser. The time at which the heat pipe reversed was dependent of the heat pipe properties, the sodium loop flow rate and heating conditions at the condenser. The start-up and the operational shut-down by forced cooling of the condenser were also studied. During the start-up process, at least part of the heat pipe was active. The active region extended gradually down to the end of the condenser until all working fluid in the heat pipe was molten. With forced cooling at the condenser, the heat pipe approached its heat transport limit before section of the condenser became frozen. The measured heat transport limit was in agreement with the theoretical value. 5 refs.

Nguyen, H.X.; Hahn, T.O.; Hahn, O.J.; Chow, L.C.; Tagavi, K.A.; Morgan, M.J. (Kentucky, University, Lexington (United States) USAF, Wright Laboratory, Wright-Patterson AFB, OH (United States))

1992-01-01T23:59:59.000Z

458

October 15, 2001 PRE-INSULATED UNDERGROUND PIPE FOR STEAM  

E-Print Network (OSTI)

SERVICE PART 1 ­ GENERAL 1.01 SUMMARY Underground steam and condensate distribution systems includingOctober 15, 2001 02558-1 PRE-INSULATED UNDERGROUND PIPE FOR STEAM AND CONDENSATE SERVICE CONSTRUCTION STANDARD SPECIFICATION SECTION 02558 PRE-INSULATED UNDERGROUND PIPE FOR STEAM AND CONDENSATE

459

Fast reactor power plant design having heat pipe heat exchanger  

DOE Patents (OSTI)

The invention relates to a pool-type fission reactor power plant design having a reactor vessel containing a primary coolant (such as liquid sodium), and a steam expansion device powered by a pressurized water/steam coolant system. Heat pipe means are disposed between the primary and water coolants to complete the heat transfer therebetween. The heat pipes are vertically oriented, penetrating the reactor deck and being directly submerged in the primary coolant. A U-tube or line passes through each heat pipe, extended over most of the length of the heat pipe and having its walls spaced from but closely proximate to and generally facing the surrounding walls of the heat pipe. The water/steam coolant loop includes each U-tube and the steam expansion device. A heat transfer medium (such as mercury) fills each of the heat pipes. The thermal energy from the primary coolant is transferred to the water coolant by isothermal evaporation-condensation of the heat transfer medium between the heat pipe and U-tube walls, the heat transfer medium moving within the heat pipe primarily transversely between these walls.

Huebotter, P.R.; McLennan, G.A.

1984-08-30T23:59:59.000Z

460

Fast reactor power plant design having heat pipe heat exchanger  

DOE Patents (OSTI)

The invention relates to a pool-type fission reactor power plant design having a reactor vessel containing a primary coolant (such as liquid sodium), and a steam expansion device powered by a pressurized water/steam coolant system. Heat pipe means are disposed between the primary and water coolants to complete the heat transfer therebetween. The heat pipes are vertically oriented, penetrating the reactor deck and being directly submerged in the primary coolant. A U-tube or line passes through each heat pipe, extended over most of the length of the heat pipe and having its walls spaced from but closely proximate to and generally facing the surrounding walls of the heat pipe. The water/steam coolant loop includes each U-tube and the steam expansion device. A heat transfer medium (such as mercury) fills each of the heat pipes. The thermal energy from the primary coolant is transferred to the water coolant by isothermal evaporation-condensation of the heat transfer medium between the heat pipe and U-tube walls, the heat transfer medium moving within the heat pipe primarily transversely between these walls.

Huebotter, Paul R. (Western Springs, IL); McLennan, George A. (Downers Grove, IL)

1985-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "visible piping visible" 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

CODIFICATION OF FIBER REINFORCED COMPOSITE PIPING  

DOE Green Energy (OSTI)

The goal of the overall project is to successfully adapt spoolable FRP currently used in the oil industry for use in hydrogen pipelines. The use of FRP materials for hydrogen service will rely on the demonstrated compatibility of these materials for pipeline service environments and operating conditions. The ability of the polymer piping to withstand degradation while in service, and development of the tools and data required for life management are imperative for successful implementation of these materials for hydrogen pipeline. The information and data provided in this report provides the technical basis for the codification for fiber reinforced piping (FRP) for hydrogen service. The DOE has invested in the evaluation of FRP for the delivery for gaseous hydrogen to support the development of a hydrogen infrastructure. The codification plan calls for detailed investigation of the following areas: System design and applicable codes and standards; Service degradation of FRP; Flaw tolerance and flaw detection; Integrity management plan; Leak detection and operational controls evaluation; Repair evaluation. The FRP codification process started with commercially available products that had extensive use in the oil and gas industry. These products have been evaluated to assure that sufficient structural integrity is available for a gaseous hydrogen environment.

Rawls, G.

2012-10-10T23:59:59.000Z

462

Surveillance Guide - OPS 9.18 Equipment and Piping Labeling  

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

EQUIPMENT AND PIPING LABELING EQUIPMENT AND PIPING LABELING 1.0 Objective The objective of this surveillance is to verify that facility equipment and piping are labeled in a manner such that facility personnel are able to positively identify equipment they operate. This surveillance provides a basis for evaluating the effectiveness of the contractor's program for labeling equipment and piping and for establishing compliance with DOE requirements. 2.0 References 2.1 DOE 5480.19, Conduct of Operations Requirements for DOE Facilities 2.2 DOE-STD-1044-93, Guide to Good Practices for Equipment and Piping Labeling 3.0 Requirements Implemented This surveillance is conducted to implement requirements of the Functions, Requirements and Authorities Manual, Section 20,

463

CRAD, Equipment and Piping Labeling Assessment Plan | Department of Energy  

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

Equipment and Piping Labeling Assessment Plan Equipment and Piping Labeling Assessment Plan CRAD, Equipment and Piping Labeling Assessment Plan Performance Objective: To verify that facility equipment and piping are labeled in a manner such that facility personnel are able to positively identify equipment they operate. To ensure that an effective labeling program is in effect to reduce operator and maintenance errors from incorrect identification of equipment, to increase training effectiveness by tracing the actual facility system as opposed to tracing its schematic, and to reduce personnel exposure to radiation and hazardous materials. This assessment provides a basis for evaluating the effectiveness of the contractor's program for labeling equipment and piping and for establishing compliance with DOE requirements.

464

Analysis of the transient compressible vapor flow in heat pipe  

SciTech Connect

The transient compressible one-dimensional vapor flow dynamics in a heat pipe is modeled. The numerical results are obtained by using the implicit non-iterative Beam-Warming finite difference method. The model is tested for simulated heat pipe vapor flow and actual vapor flow in cylindrical heat pipes. A good comparison of the present transient results for the simulated heat pipe vapor flow with the previous results of a two-dimensional numerical model is achieved and the steady state results are in agreement with the existing experimental data. The transient behavior of the vapor flow under subsonic, sonic, and supersonic speeds and high mass flow rates are successfully predicted. The one-dimensional model also describes the vapor flow dynamics in cylindrical heat pipes at high temperatures.

Jang, J.H.; Faghri, A. [Wright State Univ., Dayton, OH (United States); Chang, W.S. [Wright Research and Development Center, Wright-Patterson, OH (United States)

1989-07-01T23:59:59.000Z

465

Long titanium heat pipes for high-temperature space radiators  

SciTech Connect

Titanium heat pipes are being developed to provide light weight, reliable heat rejection devices as an alternate radiator design for the Space Reactor Power System (SP-100). The radiator design includes 360 heat pipes, each of which is 5.2 m long and dissipates 3 kW of power at 775 K. The radiator heat pipes use potassium as the working fluid, have two screen arteries for fluid return, a roughened surface distributive wicking system, and a D-shaped cross-section container configuration. A prototype titanium heat pipe, 5.5-m long, has been fabricated and tested in space-simulating conditions. Results from startup and isothermal operation tests are presented. These results are also compared to theoretical performance predictions that were used to design the heat pipe initially.

Girrens, S.P.; Ernst, D.M.

1982-01-01T23:59:59.000Z

466

Heat pipe cooling for scramjet engines. Final report  

Science Conference Proceedings (OSTI)

Liquid metal heat pipe cooling systems have been investigated for the combustor liner and engine inlet leading edges of scramjet engines for a missile application. The combustor liner is cooled by a lithium-TZM molybdenum annular heat pipe, which incorporates a separate lithium reservoir. Heat is initially absorbed by the sensible thermal capacity of the heat pipe and liner, and subsequently by the vaporization and discharge of lithium to the atmosphere. The combustor liner temperature is maintained at 3400 F or less during steady-state cruise. The engine inlet leading edge is fabricated as a sodium-superalloy heat pipe. Cooling is accomplished by radiation of heat from the aft surface of the leading edge to the atmosphere. The leading edge temperature is limited to 1700 F or less. It is concluded that heat pipe cooling is a viable method for limiting scramjet combustor liner and engine inlet temperatures to levels at which structural integrity is greatly enhanced.

Silverstein, C.C.

1986-12-01T23:59:59.000Z

467

Glass-heat-pipe evacuated-tube solar collector  

DOE Patents (OSTI)

A glass heat pipe is adapted for use as a solar energy absorber in an evacuated tube solar collector and for transferring the absorbed solar energy to a working fluid medium or heat sink for storage or practical use. A capillary wick is formed of granular glass particles fused together by heat on the inside surface of the heat pipe with a water glass binder solution to enhance capillary drive distribution of the thermal transfer fluid in the heat pipe throughout the entire inside surface of the evaporator portion of the heat pipe. Selective coatings are used on the heat pipe surface to maximize solar absorption and minimize energy radiation, and the glass wick can alternatively be fabricated with granular particles of black glass or obsidian.

McConnell, R.D.; VanSant, J.H.

1981-08-06T23:59:59.000Z

468

Review of the Savannah River Site, Salt Waste Processing Facility, Construction Quality of Piping and Pipe Supports, September 2012  

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

Savannah River Site, Salt Waste Processing Savannah River Site, Salt Waste Processing Facility, Construction Quality of Piping & Pipe Supports September 2012 Office of Safety and Emergency Management Evaluations Office of Enforcement and Oversight Office of Health, Safety and Security U.S. Department of Energy Table of Contents 1.0 Purpose................................................................................................................................................. 1 2.0 Scope.................................................................................................................................................... 1 3.0 Background .......................................................................................................................................... 1

469

Review of the Savannah River Site, Salt Waste Processing Facility, Construction Quality of Piping and Pipe Supports, September 2012  

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

Savannah River Site, Salt Waste Processing Savannah River Site, Salt Waste Processing Facility, Construction Quality of Piping & Pipe Supports September 2012 Office of Safety and Emergency Management Evaluations Office of Enforcement and Oversight Office of Health, Safety and Security U.S. Department of Energy Table of Contents 1.0 Purpose................................................................................................................................................. 1 2.0 Scope.................................................................................................................................................... 1 3.0 Background .......................................................................................................................................... 1

470

Design and technology of heat pipes for cooling and heat exchange  

SciTech Connect

This new book presents a comprehensive account of heat pipe design, technology, and operation. It is based on insights and techniques developed by the author during more than twenty years of investigating high-performance heat pipe systems. The book provides information on a unique device with the capability to transport heat isothermally at high rates with no external power input. Emphasis is on high-performance liquid metal heat pipes, although nonliquid metal heat pipes are treated, as well. The first three chapters deal with the nonmathematical background for understanding heat pipe operation and heat transport capability. Remaining chapters detail heat pipe characteristics and design methods. Of special interest are simplified equations for obtaining heat pipe heat transport limits, heat pipe heat exchangers, heat pipe transient behavior, and inverted (nonwetting) heat pipes. Operational boundaries on heat pipe temperature and heat transport rate are described, and step-by-step procedures are given for involved calculations.

Silverstein, C.C.

1992-01-01T23:59:59.000Z

471

Characterization of Pipes, Drain Lines, and Ducts using the Pipe Explorer System  

Office of Scientific and Technical Information (OSTI)

MC/30172-97/C0803 MC/30172-97/C0803 Title: Characterization of Pipes, Drain Lines, and Ducts Using the Pipe Explorer System TM Authors: C.D. Cremer D.T. Kendrick E. Cramer Contractor: Science and Engineering Associates, Inc. 6100 Uptown Blvd, NE Albuquerque, NM 87100 Contract Number: DE-AC21-93MC30172 Conference: Industry Partnerships to Deploy Environmental Technology Conference Location: Morgantown, West Virginia Conference Dates: October 22-24, 1996 Conference Sponsor: Morgantown Energy Technology Center 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 any 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

472

Persistence of a pinch in a pipe  

E-Print Network (OSTI)

The response of low-dimensional solid objects combines geometry and physics in unusual ways, exemplified in structures of great utility such as a thin-walled tube that is ubiquitous in nature and technology. Here we provide a particularly surprising consequence of this confluence of geometry and physics in tubular structures: the anomalously large persistence of a localized pinch in an elastic pipe whose effect decays very slowly as an oscillatory exponential with a persistence length that diverges as the thickness of the tube vanishes, which we confirm experimentally. The result is more a consequence of geometry than material properties, and is thus equally applicable to carbon nanotubes as it is to oil pipelines.

L. Mahadevan; A. Vaziri; Moumita Das

2006-07-13T23:59:59.000Z

473

Challenges with jointed-pipe underbalanced operations  

Science Conference Proceedings (OSTI)

Successful underbalanced operations demand a systematic approach with integration of engineering, operations, production, reservoir, and geology. There are significant advantages to underbalanced drilling (UD). Formation damage can be minimized if proper circulating fluids and operating parameters are chosen; there is an opportunity for reservoir evaluation and characterization while drilling; lost circulation and differential sticking can be avoided, combined with improvements in drilling rate of penetration (ROP); and it also provides an alternative method of well control. This paper discusses engineering challenges and considerations for underbalanced operations using multiphase flow as well as advances made during UD with rotary jointed pipe. Excluding air, mist, and foam, underbalanced techniques with multiphase fluids are reviewed. Much of the discussion and concepts also apply to coiled-tubing underbalanced operations.

Saponja, J.

1998-06-01T23:59:59.000Z

474

Transient performance investigation of a space power system heat pipe  

SciTech Connect

Start-up, shut-down, and peak power tests have been conducted with a molybdenum-lithium heat pipe at temperatures to 1500 K. The heat pipe was radiation coupled to a water cooled calorimeter for the tests with rf induction heating used for the input to the evaporator region. Maximum power throughput in the tests was 36.8 kw corresponding to a power density of 23 kw/cm/sup 2/ for the 1.4 cm diameter vapor space of the annular wick heat pipe. The corresponding evaporator flux density was approximately 150 w/cm/sup 2/ over an evaporator length of 40 cm at peak power. Condenser length for the tests was approximately 3.0 m. A variable geometry radiation shield was used to vary the load on the heat pipe during the tests. Results of the tests showed that liquid depletion in the evaporator region of the heat pipe could occur in shut-down and prevent restart of the heat pipe. Changes in surface emissivity of the heat pipe condenser surface were shown to affect the shut-down and re-start limits. 12 figs.

Merrigan, M.A.; Keddy, E.S.; Sena, J.T.

1986-01-01T23:59:59.000Z

475

Development and Manufacture of Cost Effective Composite Drill Pipe  

SciTech Connect

This technical report presents the engineering research, process development and data accomplishments that have transpired to date in support of the development of Cost Effective Composite Drill Pipe (CDP). The report presents progress made from October 1, 2004 through September 30, 2005 and contains the following discussions: (1) Qualification Testing; (2) Prototype Development and Testing of ''Smart Design'' Configuration; (3) Field Test Demonstration; and (4) Commercial order for SR-CDP from Torch International. The objective of this contract is to develop and demonstrate ''cost effective'' Composite Drill Pipe. It is projected that this drill pipe will weigh less than half of its steel counter part. The resultant weight reduction will provide enabling technology that will increase the lateral distance that can be reached from an offshore drilling platform and the depth of water in which drilling and production operations can be carried out. Further, composite drill pipe has the capability to carry real time signal and power transmission within the pipe walls. CDP can also accommodate much shorter drilling radius than is possible with metal drill pipe. As secondary benefits, the lighter weight drill pipe can increase the storage capability of floating off shore drilling platforms and provide substantial operational cost savings.

James C. Leslie; James C. Leslie II; Lee Truong; James T. Heard; Steve Loya

2006-02-20T23:59:59.000Z

476

The Economics of Steam Vs. Electric Pipe Heating  

E-Print Network (OSTI)

To properly design a pipe heating system, the basic principles of heat transfer from an insulated pipe must be understood. The three methods of heat flow are conduction, convection (both forced and natural) and radiation. The total heat loss from a pipe must be determined first, since this is the heat which must be replaced to maintain a pipe at a given temperature. A steam heating system requires an analysis of the heat loss from the pipe as well as an analysis of the capacity of the heating system. The economics of steam heat include the accessories as well as the inefficiencies of steam heat. The design of an electric heating system normally involves far fewer components and engineering complexities than does a comparable steam system. The basic system is comprised of the heater, controls and connection accessories. Today there are several economic trade-offs to be made in selecting a pipe heating system. These involve engineering and design costs, maintenance costs, installation costs and energy costs. The economic trade-offs to be made in selecting a pipe heating system do not universally favor one system over another for all cases.

Schilling, R. E.

1985-05-01T23:59:59.000Z

477

Heat pipe technology for coal-fired power systems  

SciTech Connect

This report summarizes the results of heat pipe R and D activities at Argonne National Laboratory (ANL) during the 1977 to 1984 time period. The heat pipe development efforts were associated with a variety of DOE supported projects involving coal-fired prime movers for stationary power generation. The role of heat pipes for these power systems is in their potential application as thermal transport systems for integrating fluidized bed combustors (FBC) with prime movers ranging from Stirling engines in total energy systems (approx.10 MWe) to closed-cycle gas turbines in central power plants (approx.1000 MWe). The results of initial investigations at ANL demonstrated that high-temperature sodium heat pipes provided the best heat exchanger technology for integrating Stirling engines with coal-fired FBC systems. A major accomplishment included the development and validation of a computer code (ANL/HTP) which calculates heat pipe operating limits and other significant characteristics necessary for power plant design. A number of developmental and prototype heat pipes were designed and fabricated through a subcontract effort with Thermacore, Inc., and delivered to ANL for performance testing. Preliminary test results from ANL's Heat Pipe Test Facility, using induction heating and a gas-water calorimeter to establish energy balances, are given in the report. Test data obtained to date are consistent with ANL/HTP code predictions. 47 refs., 53 figs., 22 tabs.

Uherka, K.L.; Holtz, R.E.; McLennan, G.A.; Koehl, E.R.

1985-04-01T23:59:59.000Z

478

Capacitance Probe for Detection of Anomalies in Nonmetallic Plastic Pipe  

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

Capacitance Probe for Detection of Anomalies in Capacitance Probe for Detection of Anomalies in Nonmetallic Plastic Pipe Opportunity The Department of Energy's National Energy Technology Laboratory (NETL) is seeking collaborative research and licensing partners interested in implementing United States Patent Number 7,839,282 entitled "Capacitance Probe for Detection of Anomalies in Nonmetallic Plastic Pipe." Disclosed in this patent is an analysis of materials using a capacitive sensor to detect anomalies in nonmetallic plastic pipe through comparison of measured capacitances. The capacitive sensor is used in conjunction with a capacitance measurement device, a location device, and a processor to generate a capacitance versus location output for the detection and localization of anomalies

479

Natural Gas Pipe Line Companies (Connecticut) | Department of Energy  

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

Pipe Line Companies (Connecticut) Pipe Line Companies (Connecticut) Natural Gas Pipe Line Companies (Connecticut) < Back Eligibility Agricultural Commercial Construction Fed. Government Fuel Distributor General Public/Consumer Industrial Installer/Contractor Institutional Investor-Owned Utility Local Government Low-Income Residential Multi-Family Residential Municipal/Public Utility Nonprofit Residential Retail Supplier Rural Electric Cooperative Schools State/Provincial Govt Systems Integrator Transportation Tribal Government Utility Program Info State Connecticut Program Type Siting and Permitting Provider Public Utilities Regulatory Authority These regulations list standards and considerations for the design, construction, compression, metering, operation, and maintenance of natural gas pipelines, along with procedures for records, complaints, and service

480

Vibration test plan for a space station heat pipe subassembly  

SciTech Connect

This test plan describes the Sundstrand portion of task two of Los Alamos National Laboratory (LANL) contract 9-x6H-8102L-1. Sundstrand Energy Systems was awarded a contract to investigate the performance capabilities of a potassium liquid metal heat pipe as applied to the Organic Rankine Cycle (ORC) solar dynamic power system for the Space Station. The test objective is to expose the heat pipe subassembly to the random vibration environment which simulates the space shuttle launch condition. The results of the test will then be used to modify as required future designs of the heat pipe.

Parekh, M.B. [Sundstrand Energy Systems, Rockford, IL (United States)

1987-09-29T23:59:59.000Z

Note: This page contains sample records for the topic "visible piping visible" 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

Pantex erects nearly 400 piping metal supports | National Nuclear Security  

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

erects nearly 400 piping metal supports | National Nuclear Security erects nearly 400 piping metal supports | National Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy Emergency Response Recapitalizing Our Infrastructure Continuing Management Reform Countering Nuclear Terrorism About Us Our Programs Our History Who We Are Our Leadership Our Locations Budget Our Operations Media Room Congressional Testimony Fact Sheets Newsletters Press Releases Speeches Events Social Media Video Gallery Photo Gallery NNSA Archive Federal Employment Apply for Our Jobs Our Jobs Working at NNSA Blog Home > NNSA Blog > Pantex erects nearly 400 piping metal supports Pantex erects nearly 400 piping metal supports Posted By Office of Public Affairs Workers at the Pantex Plant are in the process of erecting nearly 400 metal

482

Pantex erects nearly 400 piping metal supports | National Nuclear Security  

National Nuclear Security Administration (NNSA)

erects nearly 400 piping metal supports | National Nuclear Security erects nearly 400 piping metal supports | National Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy Emergency Response Recapitalizing Our Infrastructure Continuing Management Reform Countering Nuclear Terrorism About Us Our Programs Our History Who We Are Our Leadership Our Locations Budget Our Operations Media Room Congressional Testimony Fact Sheets Newsletters Press Releases Speeches Events Social Media Video Gallery Photo Gallery NNSA Archive Federal Employment Apply for Our Jobs Our Jobs Working at NNSA Blog Home > NNSA Blog > Pantex erects nearly 400 piping metal supports Pantex erects nearly 400 piping metal supports Posted By Office of Public Affairs Workers at the Pantex Plant are in the process of erecting nearly 400 metal

483

Sizing Relationships for Pipe Wall Preheater-710 Reactor Experiment  

SciTech Connect

Relationships presented as curves are given that permit selection of preheater pipe diameters and lengths consistent with objective pressure drops, wall temperatures, and heat addition. The data are for 710 reactor experiment coolant and operating conditions.

Moon, C.W.

1965-01-29T23:59:59.000Z

484

High temperature heat pipes for waste heat recovery  

SciTech Connect

Operation of heat pipes in air at temperatures above 1200/sup 0/K has been accomplished using SiC as a shell material and a chemical vapor deposit (CVD) tungsten inner liner for protection of the ceramic from the sodium working fluid. The CVD tungsten has been used as a distribution wick for the gravity assisted heat pipe through the development of a columnar tungsten surface structure, achieved by control of the metal vapor deposition rate. Wick performance has been demonstrated in tests at approximately 2 kW throughput with a 19-mm-i.d. SiC heat pipe. Operation of ceramic heat pipes in repeated start cycle tests has demonstrated their ability to withstand temperature rise rates of greater than 1.2 K/s.

Merrigan, M.A.; Keddy, E.S.

1980-01-01T23:59:59.000Z

485

Information and self-selection in the PIPE market  

E-Print Network (OSTI)

PIPEs (Private Investments in Public Equity) are unique in that they are negotiated privately between sophisticated investors and the public firm. As a result, the issue price deviates from the firm's stock price, often ...

Koshal, Amit

2007-01-01T23:59:59.000Z

486

Evaluation of Stress Corrosion Cracking Susceptibility of Drill Pipe ...  

Science Conference Proceedings (OSTI)

G-105 and S-135 grades of drill pipe steels have been used to study the effect of temperature and solution chemistry on the stress corrosion cracking behavior of ...

487

Selection of minimum earthquake intensity in calculating pipe failure probabilities  

SciTech Connect

In a piping reliability analysis, it is sometimes necessary to specify a minimum ground motion intensity, usually the peak acceleration, below which the ground motions are not considered as earthquakes and, hence, are neglected. The calculated probability of failure of a piping system is dependent on this selected minimum earthquake intensity chosen for the analysis. A study was conducted to determine the effects of the minimum earthquake intensity on the probability of pipe failure. The results indicated that the probability of failure of the piping system is not very sensitive to the variations of the selected minimum peak ground acceleration. However, it does have significant effects on various scenarios that make up the system failure.

Lo, T.Y.

1985-01-01T23:59:59.000Z

488

Evaluation of Pipe-Type Cable Joint Restraint Systems  

Science Conference Proceedings (OSTI)

Joints in underground transmission pipe-type cables must be designed to accommodate the thermomechanical forces created as a cable heats and cools in operation. This report details an investigation of several joint restraining designs and recommends one design.

1990-04-06T23:59:59.000Z

489

Tornadogenesis with and without a Dynamic Pipe Effect  

Science Conference Proceedings (OSTI)

A dynamic pipe effect (DPE) has been used previously to explain the descent from aloft of tornadic vortex signatures (TVSs), and presumably embryonic tornadoes, prior to the near-ground spinup of the tornado. But for many tornadoes the TVS ...

R. Jeffrey Trapp; Robert Davies-Jones

1997-01-01T23:59:59.000Z

490

Have You Looked at Your Pipes Lately? | Department of Energy  

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

Web sites. Addthis Related Articles Turn Down the Temp, But Don't Let Your Pipes Freeze Rooftop solar water heaters need regular maintenance to operate at peak efficiency. |...

491

Steam bubble collapse, water hammer and piping network response  

E-Print Network (OSTI)

Work on steam bubble collapse, water hammer and piping network response was carried out in two closely related but distinct sections. Volume I of ,,is report details the experiments and analyses carried out in conjunction ...

Gruel, R.

492

Composite drill pipe and method for forming same  

DOE Patents (OSTI)

A lightweight and durable drill pipe string capable of short radius drilling formed using a composite pipe segment formed to include tapered wall thickness ends that are each defined by opposed frustoconical surfaces conformed for self-aligning receipt and intimate bonding contact within an annular space between corresponding surfaces of a coaxially nested set of metal end pieces and a set of nonconductive sleeves. The distal peripheries of the nested end pieces and sleeves are then welded to each other and the sandwiched and bonded portions are radially pinned. The composite segment may include imbedded conductive leads and the axial end portions of the end pieces are shaped to form a threaded joint with the next pipe assembly that includes contact rings in the opposed surfaces of the pipe joint for contact together.

Leslie, James C; Leslie, II, James C; Heard, James; Truong, Liem V; Josephson, Marvin

2012-10-16T23:59:59.000Z

493

NETL: News Release - Carbon Fiber Drill Pipe Demonstrates Resiliency...  

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

lightweight drill pipe, made of space-age carbon fiber composites rather than traditional steel, is a step closer to becoming a major government-industry R&D success story. The...

494

Flow modification in McGill Heat Pipes.  

E-Print Network (OSTI)

??A heat pipe is a heat transfer device of very high thermal conductance that features two-phase flow. Research at McGill University has led to the… (more)

Lee, JuHee, 1973-

2005-01-01T23:59:59.000Z

495

Seismic Capacity of Threaded, Brazed, and Grooved Pipe Joints  

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

SEISMIC CAPACITY OF THREADED, BRAZED AND GROOVED PIPE JOINTS Brent Gutierrez, PhD, PE George Antaki, PE, F.ASME DOE NPH Conference October 25-26, 2011 Motivation * Understand the...

496

Solid0Core Heat-Pipe Nuclear Batterly Type Reactor  

DOE Green Energy (OSTI)

This project was devoted to a preliminary assessment of the feasibility of designing an Encapsulated Nuclear Heat Source (ENHS) reactor to have a solid core from which heat is removed by liquid-metal heat pipes (HP).

Ehud Greenspan

2008-09-30T23:59:59.000Z

497

Membrane heat pipe development for space radiator applications  

SciTech Connect

A self-deploying membrane heat pipe (SMHP) is being designed and fabricated to operate in an in-cabin experiment aboard a STS flight. The heat pipe comprises a mylar membrane with a woven fabric arterial wick and R-11 as the working fluid. Preliminary results indicate that this SMHP design will successfully expand and retract in response to an applied heat load; the retraction force is provided by a constant force spring.

Woloshun, K.; Merrigan, M.

1986-01-01T23:59:59.000Z

498

Commercial high efficiency dehumidification systems using heat pipes  

SciTech Connect

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

1993-09-01T23:59:59.000Z

499

Performance characteristics of gravity-assisted, potassium heat pipes  

SciTech Connect

Experiments with potassium-stainless steel gravity-assisted heat pipes were performed. Performance limitations due to entrainment or flooding of the liquid return flow are compared with analytical model predictions. The effect of heated pool height was investigated and problems with surface wetting are discussed. A comparison between entrainment limits for smooth-walled and textured-walled heat pipes was made and a minimum internal surface texturing depth is suggested.

Prenger, F.C.; Keddy, E.S.; Sena, J.T.

1985-01-01T23:59:59.000Z

500

Heat pipe thermal control of slender optics probes  

SciTech Connect

The thermal design for a stereographic viewing system is presented. The design incorporates an annular heat pipe and thermal isolation techniques. Test results are compared with design predictions for a prototype configuration. Test data obtained during heat pipe startup showing temperature gradients along the evaporator wall are presented. Correlations relating maximum wall temperature differences to a liquid Reynolds number were obtained at low power levels. These results are compared with Nusselt's Falling Film theory.

Prenger, F.C.

1979-01-01T23:59:59.000Z