Sample records for water inlet filter

  1. Acceptance test report, 241-AW air inlet filter station pressure decay test

    SciTech Connect (OSTI)

    Tuck, J.A.

    1996-02-21T23:59:59.000Z

    This is the acceptance test report for pressure decay tests performed on newly-installed 241-AW Tank Farm primary ventilation system air inlet filter stations.

  2. Zone heated inlet ignited diesel particulate filter regeneration

    DOE Patents [OSTI]

    Gonze, Eugene V [Pinckney, MI; Ament, Frank [Troy, MI

    2012-06-26T23:59:59.000Z

    An exhaust system that processes exhaust generated by an engine is provided. The system includes: a particulate filter (PF) that is disposed downstream of the engine and that filters particulates from the exhaust; and a grid that includes electrically resistive material that is segmented by non-conductive material into a plurality of zones and wherein the grid is applied to an exterior upstream surface of the PF.

  3. Figure 1. Typical Slow Sand Filter Schematic Supernatant Water

    E-Print Network [OSTI]

    Figure 1. Typical Slow Sand Filter Schematic Headspace Supernatant Water Schmutzdecke Raw water Supernatant drain Filter drain & backfill Sand media Support gravel Drain tile Adjustable weir Overflow weir Vent Control valve Treated Water Effluent flow control structure Overflow Assessing Temperature

  4. Potential for Hepa filter damage from water spray systems in filter plenums

    SciTech Connect (OSTI)

    Bergman, W.; Fretthold, J.K.; Slawsld, J.W.

    1997-01-01T23:59:59.000Z

    The water spray systems in high efficiency particulate air (HEPA) filter plenums that are used in nearly all Department of Energy (DOE) facilities for protection against fire was designed under the assumption that the HEPA filters would not be damaged by the water sprays. The most likely scenario for filter damage involves filter plugging by the water spray, followed by the fan blowing out the filter medium. A number of controlled laboratory tests that were previously conducted in the late 1980s are reviewed in this paper to provide a technical basis for the potential HEPA filter damage by the water spray system in HEPA filter plenums. In addition to the laboratory tests, the scenario for HEPA filter damage during fires has also occurred in the field. Afire in a four-stage, HEPA filter plenum at Rocky Flats in 1980 caused the first three stages of HEPA filters to blow out of their housing and the fourth stage to severely bow. Details of this recently declassified fire are presented in this paper. Although these previous findings suggest serious potential problems exist with the current water spray system in filter plenum , additional studies are required to confirm unequivocally that DOE`s critical facilities are at risk.

  5. Water washable stainless steel HEPA filter

    DOE Patents [OSTI]

    Phillips, Terrance D. (617 Chestnut Ct., Aiken, SC 29803)

    2001-01-01T23:59:59.000Z

    The invention is a high efficiency particulate (HEPA) filter apparatus and system, and method for assaying particulates. The HEPA filter provides for capture of 99.99% or greater of particulates from a gas stream, with collection of particulates on the surface of the filter media. The invention provides a filter system that can be cleaned and regenerated in situ.

  6. Filtering Water Concept: Students will be acquainted with filter processes and the importance of certain

    E-Print Network [OSTI]

    Benitez-Nelson, Claudia

    -alone. Students then pour fixed volume over substrate and wait for water to trickle through filter. Fixed volumes fixed substrate to filter varied amounts of "dirty water" to test efficiency or capacity of substrate in gravel (big rocks vs. small rocks vs. sand in a creek bed/sediment profile). #12;

  7. Contaminant Concentrations in Storm Water Entering the Sinclair/Dyes Inlet Subasin of the Puget Sound, USA, During Storm Event and Baseflow Conditions

    SciTech Connect (OSTI)

    Brandenberger, Jill M.; May, Christopher W.; Cullinan, Valerie I.; Johnston, Robert K.; Leisle, D. E.; Beckwith, B.; Sherrell, Gerald; Mettallo, David; Pingree, Ryan

    2007-03-29T23:59:59.000Z

    The Sinclair and Dyes Inlet watershed is located on the west side of Puget Sound in Kitsap County, Washington, U.S.A. (Figure 1). Puget Sound Naval Shipyard (PSNS), U.S Environmental Protection Agency (USEPA), the Washington State Department of Ecology (WA-DOE), Kitsap County, City of Bremerton, City of Bainbridge Island, City of Port Orchard, and the Suquamish Tribe have joined in a cooperative effort to evaluate water-quality conditions the Sinclair-Dyes Inlet watershed and correct identified problems. A major focus of this project, known as Project ENVVEST, is to develop Water Clean-up (TMDL) Plans for constituents listed on the 303(d) list within the Sinclair and Dyes Inlet watershed. Segments within the Sinclair and Dyes Inlet watershed were listed on the State of Washington’s 1998 303(d) due to fecal coliform contamination in marine water, metals in sediment and fish tissue, and organics in sediment and fish tissue (WA-DOE 2003). Stormwater loading was identified by ENVVEST as one potential source of sediment contamination, which lacked sufficient data for the contaminant mass balance calculations conducted for the watershed. This paper summarizes the contaminant concentrations in representative streams and outfalls discharging into Sinclair and Dyes Inlets during 18 storm events and wet/dry season baseflow conditions between November 2002 and May 2005. This paper serves as a portion of the report titled, “Surface and Stormwater Quality Assessment for Sinclair and Dyes Inlet, Washington” (Brandenberger et al. 2007).

  8. Design of fuel efficient brick kiln for ceramic water filter firing in Ghana

    E-Print Network [OSTI]

    Adjorlolo, Eric (Eric James Kofi)

    2007-01-01T23:59:59.000Z

    Ceramic water filters are currently produced in Ghana in order to provide a household solution to contaminated water. These filters, locally branded with the name Kosim filter by originating from Potters for Peace-Nicaragua, ...

  9. POLYMER ELECTROLYTE MEMBRANE ELECTROLYZER OPERATION WITH VARYING INLET WATER FEED CONFIGURATIONS

    SciTech Connect (OSTI)

    Fox, E

    2008-09-12T23:59:59.000Z

    Proton Exchange Membrane (PEM) electrolysis is a potential alternative technology to crack water in specialty applications where a dry gas stream is needed, such as isotope production. One design proposal is to feed the cathode of the electrolyzer with vapor phase water. This feed configuration would allow isotopic water to be isolated on the cathode side of the electrolyzer and the isotope recovery system could be operated in a closed loop. Tests were performed to characterize the difference in the current-voltage behavior between a PEM electrolyzer operated with a cathode water vapor feed and with an anode liquid water feed. The cathode water vapor feed cell had a maximum limiting current density of 100 mA/cm2 at 70 C compared to a current density of 800 mA/cm2 for the anode liquid feed cell at 70 C. The limiting current densities for the cathode water vapor feed cell were approximately 3 times lower than predicted by a water mass transfer model. It is estimated that a cathode water vapor feed electrolyzer system will need to be between 8-14 times larger in active area or number of cells than an anode liquid feed system.

  10. Data Assimilation for Estimating the Terrestrial Water Budget Using a Constrained Ensemble Kalman Filter

    E-Print Network [OSTI]

    Pan, Ming

    Data Assimilation for Estimating the Terrestrial Water Budget Using a Constrained Ensemble Kalman A procedure is developed to incorporate equality constraints in Kalman filters, including the Ensemble Kalman filter (EnKF) and is referred to as the Constrained Ensemble Kalman Filter (CEnKF). The constraint

  11. Evaluating the technical performance and social acceptability of keg-shaped ceramic water filters in Northern Ghana

    E-Print Network [OSTI]

    Cummings, Joanna (Joanna Katherine)

    2011-01-01T23:59:59.000Z

    The Kosim Water Keg (KWK) is a new ceramic water filter designed have faster filtration rates and integrate better with consumers' water habits. The design seals together two ceramic pot filters (CPFs) to form a keg shape. ...

  12. Ceramic filter manufacturing in Northern Ghana : water storage and quality control

    E-Print Network [OSTI]

    Kleiman, Shanti Lisa

    2011-01-01T23:59:59.000Z

    In 2009, Pure Home Water (PHW), a Ghana based non-profit organization working to provide affordable and safe drinking water to people in the Northern Region of Ghana, began the construction of a ceramic pot filter (CPF) ...

  13. Filtering apparatus

    DOE Patents [OSTI]

    Haldipur, G.B.; Dilmore, W.J.

    1992-09-01T23:59:59.000Z

    A vertical vessel is described having a lower inlet and an upper outlet enclosure separated by a main horizontal tube sheet. The inlet enclosure receives the flue gas from a boiler of a power system and the outlet enclosure supplies cleaned gas to the turbines. The inlet enclosure contains a plurality of particulate-removing clusters, each having a plurality of filter units. Each filter unit includes a filter clean-gas chamber defined by a plate and a perforated auxiliary tube sheet with filter tubes suspended from each tube sheet and a tube connected to each chamber for passing cleaned gas to the outlet enclosure. The clusters are suspended from the main tube sheet with their filter units extending vertically and the filter tubes passing through the tube sheet and opening in the outlet enclosure. The flue gas is circulated about the outside surfaces of the filter tubes and the particulate is absorbed in the pores of the filter tubes. Pulses to clean the filter tubes are passed through their inner holes through tubes free of bends which are aligned with the tubes that pass the clean gas. 18 figs.

  14. Filtering apparatus

    DOE Patents [OSTI]

    Haldipur, Gaurang B. (Monroeville, PA); Dilmore, William J. (Murrysville, PA)

    1992-01-01T23:59:59.000Z

    A vertical vessel having a lower inlet and an upper outlet enclosure separated by a main horizontal tube sheet. The inlet enclosure receives the flue gas from a boiler of a power system and the outlet enclosure supplies cleaned gas to the turbines. The inlet enclosure contains a plurality of particulate-removing clusters, each having a plurality of filter units. Each filter unit includes a filter clean-gas chamber defined by a plate and a perforated auxiliary tube sheet with filter tubes suspended from each tube sheet and a tube connected to each chamber for passing cleaned gas to the outlet enclosure. The clusters are suspended from the main tube sheet with their filter units extending vertically and the filter tubes passing through the tube sheet and opening in the outlet enclosure. The flue gas is circulated about the outside surfaces of the filter tubes and the particulate is absorbed in the pores of the filter tubes. Pulses to clean the filter tubes are passed through their inner holes through tubes free of bends which are aligned with the tubes that pass the clean gas.

  15. Removal of Filter Cake Generated by Manganese Tetraoxide Water-based Drilling Fluids

    E-Print Network [OSTI]

    Al Mojil, Abdullah Mohammed A.

    2011-10-21T23:59:59.000Z

    Three effective solutions to dissolve the filter cake created by water-based drilling fluids weighted with Mn3O4 particles were developed. Hydrochloric acid at concentration lower than 5 wt% can dissolve most of Mn3O4-based filter cake. Dissolving...

  16. Modeling Urban Storm-Water Quality Treatment: Model Development and Application to a Surface Sand Filter

    E-Print Network [OSTI]

    Modeling Urban Storm-Water Quality Treatment: Model Development and Application to a Surface Sand management; Urban areas; Hydraulic models; Sand, filter; Parameters; Estimation; Water treatment. Author. Optimized model parameter values were calculated on a storm by storm basis. Thereafter, a gamma distribution

  17. Nanomaterial Composites for Next Generation Water Filters: Cooperative Research and Development Final Report, CRADA Number CRD-06-197

    SciTech Connect (OSTI)

    Ginley, D.

    2013-04-01T23:59:59.000Z

    Under this CRADA, the Parties will produce and test a composite filter element that will remove particles, bacteria and viruses to produce safe drinking water.

  18. Design of bioaerosol sampling inlets

    E-Print Network [OSTI]

    Nene, Rohit Ravindra

    2007-09-17T23:59:59.000Z

    a Stokes scaling factor to selective parameters, such as inlet aspiration gap, annular gap, window height, and the rise which is the vertical distance extending from the lower flange to the base of the window. The scaled inlets display wind...

  19. Inlet nozzle assembly

    DOE Patents [OSTI]

    Christiansen, D.W.; Karnesky, R.A.; Knight, R.C.; Precechtel, D.R.; Smith, B.G.

    1985-09-09T23:59:59.000Z

    An inlet nozzle assembly for directing coolant into the duct tube of a fuel assembly attached thereto. The nozzle assembly includes a shell for housing separable components including an orifice plate assembly, a neutron shield block, a neutron shield plug, and a diffuser block. The orifice plate assembly includes a plurality of stacked plates of differently configurated and sized openings for directing coolant therethrough in a predesigned flow pattern.

  20. The segregation of silver nanoparticles in low-cost ceramic water filters

    SciTech Connect (OSTI)

    Larimer, Curtis; Ostrowski, Nicole [Department of Mechanical Engineering and Materials Science, University of Pittsburgh, Pittsburgh, PA, 15261 (United States); Speakman, Jacquelyn [Department of Civil and Environmental Engineering, University of Pittsburgh, Pittsburgh, PA, 15261 (United States); Nettleship, Ian, E-mail: nettles@pitt.edu [Department of Mechanical Engineering and Materials Science, University of Pittsburgh, Pittsburgh, PA, 15261 (United States)

    2010-04-15T23:59:59.000Z

    As an impregnated constituent in low-cost ceramic water filters, silver nanoparticles have a demonstrated antibacterial effect. The bactericidal mechanism is believed to be based on direct contact between silver and the cell wall of a contaminant organism. In this study microstructural analysis was used to examine the effect of the processing method on the distribution of silver nanoparticles in the filter material. Silver nanofluid was impregnated into fired clay ceramic samples by a low-cost soak-and-dry method. Analyses of filter samples by scanning electron microscopy, energy dispersive spectroscopy, and digital optical topological mapping showed that silver was concentrated in near surface pores, a condition that is not optimal for highest probability of silver contact. A simple experiment showed that segregation of silver occurs during the drying phase of impregnation. Drying curves showed that 90% of contained liquid evaporates from the external surface.

  1. Cook Inlet (CI) distribution

    E-Print Network [OSTI]

    ). During the winter, beluga whales occur in offshore waters associated with pack ice. In the spring RANGE Beluga whales are distributed throughout seasonally ice-covered arctic and subarctic waters of the Northern Hemisphere (Gurevich 1980), and are closely associated with open leads and polynyas in ice

  2. New Techniques to Characterize and Remove Water-Based Drilling Fluids Filter Cake 

    E-Print Network [OSTI]

    Elkatatny, Salaheldin Mahmoud

    2013-03-29T23:59:59.000Z

    Filter cake characterization is very important in drilling and completion operations. Heterogeneity of the filter cake plays a key role in the design of chemical treatments needed to remove the filter cake. The objectives of this study...

  3. New Techniques to Characterize and Remove Water-Based Drilling Fluids Filter Cake

    E-Print Network [OSTI]

    Elkatatny, Salaheldin Mahmoud

    2013-03-29T23:59:59.000Z

    Filter cake characterization is very important in drilling and completion operations. Heterogeneity of the filter cake plays a key role in the design of chemical treatments needed to remove the filter cake. The objectives of this study...

  4. Geosynthetic Filters for Water Quality Improvement of Urban Storm Water Runoff

    E-Print Network [OSTI]

    Aydilek, Ahmet

    water treatment are retention ponds, detention basins, wetland ponds, and grass swales (Strecker et al are common subsurface storm water runoff treatment systems used in urban areas. Large subsurface fil- ters the treatment system (SEMCOG 2008). Removal of filtration media such as sand is highly labor

  5. Organics Verification Study for Sinclair and Dyes Inlets, Washington

    SciTech Connect (OSTI)

    Kohn, Nancy P.; Brandenberger, Jill M.; Niewolny, Laurie A.; Johnston, Robert K.

    2006-09-28T23:59:59.000Z

    Sinclair and Dyes Inlets near Bremerton, Washington, are on the State of Washington 1998 303(d) list of impaired waters because of fecal coliform contamination in marine water, metals in sediment and fish tissue, and organics in sediment and fish tissue. Because significant cleanup and source control activities have been conducted in the inlets since the data supporting the 1998 303(d) listings were collected, two verification studies were performed to address the 303(d) segments that were listed for metal and organic contaminants in marine sediment. The Metals Verification Study (MVS) was conducted in 2003; the final report, Metals Verification Study for Sinclair and Dyes Inlets, Washington, was published in March 2004 (Kohn et al. 2004). This report describes the Organics Verification Study that was conducted in 2005. The study approach was similar to the MVS in that many surface sediment samples were screened for the major classes of organic contaminants, and then the screening results and other available data were used to select a subset of samples for quantitative chemical analysis. Because the MVS was designed to obtain representative data on concentrations of contaminants in surface sediment throughout Sinclair Inlet, Dyes Inlet, Port Orchard Passage, and Rich Passage, aliquots of the 160 MVS sediment samples were used in the analysis for the Organics Verification Study. However, unlike metals screening methods, organics screening methods are not specific to individual organic compounds, and are not available for some target organics. Therefore, only the quantitative analytical results were used in the organics verification evaluation. The results of the Organics Verification Study showed that sediment quality outside of Sinclair Inlet is unlikely to be impaired because of organic contaminants. Similar to the results for metals, in Sinclair Inlet, the distribution of residual organic contaminants is generally limited to nearshore areas already within the actively managed Puget Sound Naval Shipyard and Intermediate Maintenance Facility Superfund Site, where further source-control actions and monitoring are under way.

  6. Contactor/filter improvements

    DOE Patents [OSTI]

    Stelman, D.

    1988-06-30T23:59:59.000Z

    A contactor/filter arrangement for removing particulate contaminants from a gaseous stream is described. The filter includes a housing having a substantially vertically oriented granular material retention member with upstream and downstream faces, a substantially vertically oriented microporous gas filter element, wherein the retention member and the filter element are spaced apart to provide a zone for the passage of granular material therethrough. A gaseous stream containing particulate contaminants passes through the gas inlet means as well as through the upstream face of the granular material retention member, passing through the retention member, the body of granular material, the microporous gas filter element, exiting out of the gas outlet means. A cover screen isolates the filter element from contact with the moving granular bed. In one embodiment, the granular material is comprised of porous alumina impregnated with CuO, with the cover screen cleaned by the action of the moving granular material as well as by backflow pressure pulses. 6 figs.

  7. Siphon filter assessment for Northern Ghana

    E-Print Network [OSTI]

    Ziff, Sara Elizabeth

    2009-01-01T23:59:59.000Z

    The siphon filter is a household water filter developed by the Basic Water Needs Foundation based on the design of ceramic candle filters. The siphon filter is marketed under brand names CrystalPur and Tulip and is sold ...

  8. Variable flexure-based fluid filter

    DOE Patents [OSTI]

    Brown, Steve B.; Colston Jr., Billy W.; Marshall, Graham; Wolcott, Duane

    2007-03-13T23:59:59.000Z

    An apparatus and method for filtering particles from a fluid comprises a fluid inlet, a fluid outlet, a variable size passage between the fluid inlet and the fluid outlet, and means for adjusting the size of the variable size passage for filtering the particles from the fluid. An inlet fluid flow stream is introduced to a fixture with a variable size passage. The size of the variable size passage is set so that the fluid passes through the variable size passage but the particles do not pass through the variable size passage.

  9. Whole-mantle convection and the transition-zone water filter

    E-Print Network [OSTI]

    -induced partial melting that filters out incompatible elements. The filtered, dry and depleted solid phase), respectively, are in general chemically distinct; that is, MORBs are depleted in incom- patible elements including uranium and thorium, while OIBs are relatively enriched in these elements. This suggests that MORB

  10. Radial inlet guide vanes for a combustor

    DOE Patents [OSTI]

    Zuo, Baifang; Simons, Derrick; York, William; Ziminsky, Willy S

    2013-02-12T23:59:59.000Z

    A combustor may include an interior flow path therethrough, a number of fuel nozzles in communication with the interior flow path, and an inlet guide vane system positioned about the interior flow path to create a swirled flow therein. The inlet guide vane system may include a number of windows positioned circumferentially around the fuel nozzles. The inlet guide vane system may also include a number of inlet guide vanes positioned circumferentially around the fuel nozzles and adjacent to the windows to create a swirled flow within the interior flow path.

  11. Monitoring and evaluation of a ceramic water filter and hand-washing intervention in Northern Ghana

    E-Print Network [OSTI]

    Lu, Connie C

    2012-01-01T23:59:59.000Z

    Through a Rotary Club contract, PHW will sell Kosim filters and install Tippy-Tap hand-washing stations in 1250 households in Northern Ghana. This thesis presents the following project monitoring and evaluation components: ...

  12. Fast acting inlet guide vanes

    SciTech Connect (OSTI)

    Minne, M.; Kull, R.

    1998-07-01T23:59:59.000Z

    A fast acting inlet guide vane (IGV) system was developed for the model Siemens V94.2 gas turbine (GT). This system enables the GT to perform larger and faster load changes in the case of electrical grid disturbances. Disturbances in electrical grids are caused by an unbalance between actual power generation and power consumption resulting in grid frequency deviations. In order to reduce such deviations, it is desirable for a GT (connected to the grid), to increase/reduce load as fast as required. This task is achieved by the fast responding IGV system: Basically, the occurring grid frequency deviation is monitored by the IGV system. Depending on this deviation, the compressor air mass flow is adapted to the changing fuel mass flow (which is set approximately proportional to the frequency deviation by the GT controller). The fast IGV actuator plays a main role in this dynamic response, allowing the vanes to open/close very fast. Tests performed on Poolbeg site (Ireland) proved safe and rapid load changes with a typical load ramp of 50 MW within 3 sec.

  13. Biosand filtration of high turbidity water : modified filter design and safe filtrate storage

    E-Print Network [OSTI]

    Collin, Clair

    2009-01-01T23:59:59.000Z

    Unsafe drinking water is a major cause of water-related diseases that predominantly affect people living in developing countries. The most prevalent water-related disease is diarrhea, estimated to kill 1.8 million children ...

  14. Health and water quality monitoring of Pure Home Water's ceramic filter dissemination in the northern region of Ghana

    E-Print Network [OSTI]

    Johnson, Sophie M. (Sophie Marie)

    2007-01-01T23:59:59.000Z

    Pure Home Water (PHW) is a social enterprise that promotes and disseminates household drinking water technologies in the Northern Region of Ghana. Currently their main product is a pot-shaped Potters for Peace-type ceramic ...

  15. Contaminant Mass Balance for Sinclair and Dyes Inlets, Puget Sound, WA

    SciTech Connect (OSTI)

    Crecelius, Eric A.; Johnston, Robert K.; Leather, Jim; Guerrero, Joel; Miller, Martin C.; Brandenberger, Jill M.

    2003-04-03T23:59:59.000Z

    Sinclair Inlet and Dyes Inlets have historically received contaminates from military installations, industrial activities, municipal outfalls, and other nonpoint sources. For the purpose of determining a ?total maximum daily load? (TMDL) of contaminants for the Inlets, a contaminant mass balance for the sediments is being developed. Sediment cores and traps were collected from depositional areas of the Inlets and surface sediment grabs were collected from fluvial deposits associated with major drainage areas into the Inlets. All sediment samples were screened using X-Ray fluorescence (XRF) for metals, UV fluorescence for organics (PAHs), and immunoassay for PCBs. A subset of split-samples was analyzed using ICP/MS for metals and GC/MS for phthalates, PAHs, and PCBs. Sediment cores were age-dated using radionuclides to determine the sedimentation rate and the history of sediment contamination. Streams and storm water outfalls were sampled in both the wet and dry seasons to assess loading from the watershed. Seawater samples collected from the marine waters of the Inlets and boundary passages to central Puget Sound were used to estimate the exchange of contaminates with central Puget Sound. The historical trends from the cores indicate that contamination was at a maximum in the middle of the 1900s and decreased significantly by the late 1900s. The thickness of the contaminated sediment is in the range of 30 to 50 cm.

  16. ERDC/CHLTR-10-4 Coastal Inlets Research Program

    E-Print Network [OSTI]

    US Army Corps of Engineers

    C. Kraus July 2010 Shark River Inlet entrance, NJ, New York District after-dredge survey, January alternative plans to reduce navigation channel maintenance cost, at Shark River Inlet, NJ. Since about year 2000, channel maintenance dredging requirements at the inlet have increased. Although Shark River Inlet

  17. Electrically heated particulate filter with reduced stress

    DOE Patents [OSTI]

    Gonze, Eugene V.

    2013-03-05T23:59:59.000Z

    A system comprises a particulate matter (PM) filter comprising an inlet for receiving exhaust gas. A zoned heater is arranged in the inlet and comprises a resistive heater comprising N zones, where N is an integer greater than one. Each of the N zones comprises M sub-zones, where M is an integer greater than one. A control module selectively activates one of the N zones to initiate regeneration in downstream portions of the PM filter from the one of the N zones and deactivates others of the N zones.

  18. Properties and stability of a Texas barrier beach inlet 

    E-Print Network [OSTI]

    Mason, Curtis

    1971-01-01T23:59:59.000Z

    Profiles A and 8 East Spit Beach Pzofiles C and D West Spit Beach Profiles E and F West Spit Beach Profiles G and H 79 80 81 82 83 36 Brown Cedar Cut Location Chart, 24 October, 1970 . 85 37 Mean Water Level Surface Contours, 24 October, 1970... for a Stationary Inlet. . . . . . , . . . . . . . . 124 48 Location of Velocity Measurement Stations 136 49 50 51 52 53 54 55 56 57 58 59 60 61 Vertical Velocity Profiles, 1435 4 March, 1971 . . 137 Vertical Velocity Profiles, 1605 4...

  19. Miniature piezo electric vacuum inlet valve

    DOE Patents [OSTI]

    Keville, Robert F. (Valley Springs, CA); Dietrich, Daniel D. (Livermore, CA)

    1998-03-24T23:59:59.000Z

    A miniature piezo electric vacuum inlet valve having a fast pulse rate and is battery operated with variable flow capability. The low power (<1.6 watts), high pulse rate (<2 milliseconds), variable flow inlet valve is utilized for mass spectroscopic applications or other applications where pulsed or continuous flow conditions are needed. The inlet valve also has a very minimal dead volume of less than 0.01 std/cc. The valve can utilize, for example, a 12 Vdc input/750 Vdc, 3 mA output power supply compared to conventional piezo electric valves which require preloading of the crystal drive mechanism and 120 Vac, thus the valve of the present invention is smaller by a factor of three.

  20. Miniature piezo electric vacuum inlet valve

    DOE Patents [OSTI]

    Keville, R.F.; Dietrich, D.D.

    1998-03-24T23:59:59.000Z

    A miniature piezo electric vacuum inlet valve having a fast pulse rate and is battery operated with variable flow capability is disclosed. The low power (<1.6 watts), high pulse rate (<2 milliseconds), variable flow inlet valve is utilized for mass spectroscopic applications or other applications where pulsed or continuous flow conditions are needed. The inlet valve also has a very minimal dead volume of less than 0.01 std/cc. The valve can utilize, for example, a 12 Vdc input/750 Vdc, 3 mA output power supply compared to conventional piezo electric valves which require preloading of the crystal drive mechanism and 120 Vac, thus the valve of the present invention is smaller by a factor of three. 6 figs.

  1. An evaluation of household drinking water treatment systems in Peru : the table filter and the safe water system

    E-Print Network [OSTI]

    Coulbert, Brittany, 1981-

    2005-01-01T23:59:59.000Z

    (cont.) storage, and education. Tests on the SWSs in Peru demonstrated 99.6% E.coli removal and 95% total coliform removal. Only 30% of the SWSs tested contained water at or above the WHO-recommended concentration of free ...

  2. Enhancing the estimation of continental-scale snow water equivalent by assimilating MODIS snow cover with the ensemble Kalman filter

    E-Print Network [OSTI]

    Yang, Zong-Liang

    cover with the ensemble Kalman filter Hua Su,1 Zong-Liang Yang,1 Guo-Yue Niu,1 and Robert E. Dickinson2 of a framework for developing such needed data sets over North America, through the ensemble Kalman filter (En with the ensemble Kalman filter, J. Geophys. Res., 113, D08120, doi:10.1029/ 2007JD009232. 1. Introduction [2] Snow

  3. The Transition-Zone Water Filter Model for Global Material Circulation: Where Do We Stand?

    E-Print Network [OSTI]

    with a small melt fraction, highly incompatible elements including hydro- gen, helium and argon are sequestered the fraction of water is small. Models have been developed to understand the structure of a melt layer Hilst, et al., 1997]), then the whole mantle is depleted with only a small volume (~10%) of relatively

  4. K West Basin Integrated Water Treatment System (IWTS) E-F Annular Filter Vessel Accident Calculations

    SciTech Connect (OSTI)

    RITTMANN, P.D.

    1999-10-07T23:59:59.000Z

    Three bounding accidents postdated for the K West Basin integrated water treatment system are evaluated against applicable risk evaluation guidelines. The accidents are a spray leak during fuel retrieval, spray leak during backflushing, and a hydrogen explosion. Event trees and accident probabilities are estimated. In all cases, the unmitigated dose consequences are below the risk evaluation guidelines.

  5. Properties and stability of a Texas barrier beach inlet

    E-Print Network [OSTI]

    Mason, Curtis

    1971-01-01T23:59:59.000Z

    . . . . . , . . . . . . . . . . . . . . , . . . 52 25 26 Tidal Differential, 20 February to 15 March, 1971 . 55 Tidal Differential, 16 March to 6 April, 1971 27 Non-Astronomical Sea Level and Corresponding Wind Regimes, Inlet Tide Station . . . . . . . . . . . . 58 28 Inlet Tide Gage Record... of astronomi- cal tidal currents leads to degradation of the inlet channel and westward migration of the entire inlet system. iv ACKNOWLEDGMENTS The author would like to thank Dr. Robert M. Sorensen for his direction and assistance while acting...

  6. Sub-micron filter

    DOE Patents [OSTI]

    Tepper, Frederick (Sanford, FL); Kaledin, Leonid (Port Orange, FL)

    2009-10-13T23:59:59.000Z

    Aluminum hydroxide fibers approximately 2 nanometers in diameter and with surface areas ranging from 200 to 650 m.sup.2/g have been found to be highly electropositive. When dispersed in water they are able to attach to and retain electronegative particles. When combined into a composite filter with other fibers or particles they can filter bacteria and nano size particulates such as viruses and colloidal particles at high flux through the filter. Such filters can be used for purification and sterilization of water, biological, medical and pharmaceutical fluids, and as a collector/concentrator for detection and assay of microbes and viruses. The alumina fibers are also capable of filtering sub-micron inorganic and metallic particles to produce ultra pure water. The fibers are suitable as a substrate for growth of cells. Macromolecules such as proteins may be separated from each other based on their electronegative charges.

  7. Rotating drum filter

    DOE Patents [OSTI]

    Anson, Donald (Worthington, OH)

    1990-01-01T23:59:59.000Z

    A perforated drum (10) rotates in a coaxial cylindrical housing (18) having three circumferential ports (19,22,23), and an axial outlet (24) at one end. The axis (11) is horizontal. A fibrous filter medium (20) is fed through a port (19) on or near the top of the housing (81) by a distributing mechanism (36) which lays a uniform mat (26) of the desired thickness onto the rotating drum (10). This mat (26) is carried by the drum (10) to a second port (23) through which dirty fluid (13) enters. The fluid (13) passes through the filter (26) and the cleaned stream (16) exits through the open end (15) of the drum (10) and the axial port (24) in the housing (18). The dirty filter material (20) is carried on to a third port (22) near the bottom of the housing (18) and drops into a receiver (31) from which it is continuously removed, cleaned (30), and returned (32) to the charging port (36) at the top. To support the filter mat, the perforated cylinder may carry a series of tines (40), shaped blades (41), or pockets, so that the mat (26) will not fall from the drum (10) prematurely. To minimize risk of mat failure, the fluid inlet port (23) may be located above the horizontal centerline (11).

  8. Finite element modeling of flow through ceramic pot filters

    E-Print Network [OSTI]

    Kelly, Anna C

    2013-01-01T23:59:59.000Z

    Pure Home Water (PHW) is an organization based in Tamale, Ghana that manufactures and distributes ceramic water filters. While many ceramic filter factories manufacture flowerpot-shaped filters, PHW has transitioned from ...

  9. Gas Water Heater Energy Losses

    E-Print Network [OSTI]

    Biermayer, Peter

    2012-01-01T23:59:59.000Z

    Input Screens SCREEN D1: WATER HEATER SPECIFICATIONS 1. Tankthe house. Supply pipe – this is the water heater inlet pipewith refills the water heater with cold water Note: The TANK

  10. Evaluation of the KanchanTM Arsenic Filter under various water quality conditions of the Nawalparasi District, Nepal

    E-Print Network [OSTI]

    Espinoza, Claudia M. (Claudia Maritza)

    2011-01-01T23:59:59.000Z

    In 2002, the Massachusetts Institute of Technology Department of Civil and Environmental Engineering partnered with the Environment and Public Health Organization to develop and disseminate the KanchanTM Arsenic Filter ...

  11. Disk filter

    DOE Patents [OSTI]

    Bergman, W.

    1985-01-09T23:59:59.000Z

    An electric disk filter provides a high efficiency at high temperature. A hollow outer filter of fibrous stainless steel forms the ground electrode. A refractory filter material is placed between the outer electrode and the inner electrically isolated high voltage electrode. Air flows through the outer filter surfaces through the electrified refractory filter media and between the high voltage electrodes and is removed from a space in the high voltage electrode.

  12. An experimental investigation of flow control for supersonic inlets

    E-Print Network [OSTI]

    Titchener, Neil

    2013-07-09T23:59:59.000Z

    and in severe cases can lead to engine surge. In the early days of inlet design pressure recovery was generally considered the most im- portant parameter in inlet flow, however, the development of axial compressors with higher tip speeds and blade loadings... descriptors shown above. 7 Chapter 2. Inlet Design–A Brief Introduction For more details on distortion, especially the influence of unsteadiness, the reader should refer to the details of the flight testing trouble encountered with the F-111 described...

  13. NISTIR 6458 Characterization of the Inlet Combustion Air in

    E-Print Network [OSTI]

    Magee, Joseph W.

    NISTIR 6458 Characterization of the Inlet Combustion Air in NIST's Reference Spray Combustion January 2000 #12;ii Contents page Introduction 1 Reference Spray Combustion Facility 3 Numerical;1 Characterization of the Inlet Combustion Air in NIST's Reference Spray Combustion Facility: Effect of Vane Angle

  14. Boundary layer ingesting inlet design for a silent aircraft

    E-Print Network [OSTI]

    Freuler, Patrick N., 1980-

    2005-01-01T23:59:59.000Z

    (cont.) common nacelle, L/D ratios between 2.5 and 3.0, fan face to throat area ratios above 1.06, and offsets lower than 11%. Curvature ahead of the inlet should be avoided as well as bifurcations inside the duct. Inlet ...

  15. Flow analysis and control in a subsonic inlet

    E-Print Network [OSTI]

    Tournier, Serge (Serge E.)

    2005-01-01T23:59:59.000Z

    S-duct inlets are commonly used on subsonic cruise missiles, as they offer a good compromise between compactness, low observability and aerodynamic performance. Though currently used S-ducts exhibit good performance in ...

  16. Flow control optimization in a jet engine serpentine inlet duct

    E-Print Network [OSTI]

    Kumar, Abhinav

    2009-05-15T23:59:59.000Z

    Computational investigations were carried out on an advanced serpentine jet engine inlet duct to understand the development and propagation of secondary flow structures. Computational analysis which went in tandem with experimental investigation...

  17. EA-1949: Admiralty Inlet Pilot Tidal Project, Puget Sound, WA

    Broader source: Energy.gov [DOE]

    This EA analyzes the potential environmental effects of a proposal by the Public Utility District No. 1 of Snohomish County, Washington to construct and operate the Admiralty Inlet Tidal Project. The proposed 680-kilowatt project would be located on the east side of Admiralty Inlet in Puget Sound, Washington, about 1 kilometer west of Whidbey Island, entirely within Island County, Washington. The Federal Energy Regulatory Commission (FERC) is the lead agency. The DOE NEPA process for this project has been canceled.

  18. An Analysis of Microbial Pollution in the Sinclair-Dyes Inlet Watershed

    SciTech Connect (OSTI)

    May, Christopher W.; Cullinan, Valerie I.

    2005-09-21T23:59:59.000Z

    This assessment of fecal coliform sources and pathways in Sinclair and Dyes Inlets is part of the Project ENVironmental InVESTment (ENVVEST) being conducted by the Navy's Puget Sound Naval Shipyard and Intermediate Maintenance Facility in cooperation with the US Environmental Protection Agency, Washington State Department of Ecology, the Suquamish Tribe, Kitsap County, the City of Bremerton, the City of Port Orchard, and other local stakeholders. The goal of this study was to identify microbial pollution problems within the Sinclair-Dyes Inlet watershed and to provide a comprehensive assessment of fecal coliform (FC) contamination from all identifiable sources in the watershed. This study quantifies levels of contamination and estimated loadings from known sources within the watersheds and describes pollutant transport mechanisms found in the study area. In addition, the effectiveness of pollution prevention and mitigation measures currently in place within the Sinclair-Dyes Inlet watershed are discussed. This comprehensive study relies on historical data collected by several cooperating agencies, in addition to data collected during the study period from spring 2001 through summer 2005. This report is intended to provide the technical information needed to continue current water quality cleanup efforts and to help implement future efforts.

  19. In situ microbial filter used for bioremediation

    DOE Patents [OSTI]

    Carman, M. Leslie (San Ramon, CA); Taylor, Robert T. (Roseville, CA)

    2000-01-01T23:59:59.000Z

    An improved method for in situ microbial filter bioremediation having increasingly operational longevity of an in situ microbial filter emplaced into an aquifer. A method for generating a microbial filter of sufficient catalytic density and thickness, which has increased replenishment interval, improved bacteria attachment and detachment characteristics and the endogenous stability under in situ conditions. A system for in situ field water remediation.

  20. Filter apparatus

    DOE Patents [OSTI]

    Kuban, Daniel P. (Oak Ridge, TN); Singletary, B. Huston (Oak Ridge, TN); Evans, John H. (Rockwood, TN)

    1984-01-01T23:59:59.000Z

    A plurality of holding tubes are respectively mounted in apertures in a partition plate fixed in a housing receiving gas contaminated with particulate material. A filter cartridge is removably held in each holding tube, and the cartridges and holding tubes are arranged so that gas passes through apertures therein and across the partition plate while particulate material is collected in the cartridges. Replacement filter cartridges are respectively held in holding canisters mounted on a support plate which can be secured to the aforesaid housing, and screws mounted on said canisters are arranged to push replacement cartridges into the cartridge holding tubes and thereby eject used cartridges therefrom.

  1. The Roosevelt Inlet shipwreck: identification, analysis, and historical context

    E-Print Network [OSTI]

    McVae, Bridget Christine

    2008-10-10T23:59:59.000Z

    ................................................................................. 109 43 Glass wine bottle............................................................................ 110 44 Window glass fragments ................................................................ 112 45 Case bottle fragments... imported aboard what was the Severn’s last successful inbound voyage. Advertised merchandise includes window glass in boxes, bottles in crates and boxes, and boxes and kegs of pipes.16 All of these objects were found aboard the Roosevelt Inlet vessel...

  2. Filter Press Building

    E-Print Network [OSTI]

    Bush, W. M.

    " exemplifies the ultimate all-electric application. INTRODUCTION The City of Avon Lake launched a program in 1983 to eKpand and modernize its water pollution control facilities. A part of this expansion was construction of a separate building to house a...? was established as a year-round requirement for both management 585 ESL-IE-86-06-94 Proceedings from the Eighth Annual Industrial Energy Technology Conference, Houston, TX, June 17-19, 1986 ~>-:? ~ Filter Press Building Avon Lake Water Pollution Control...

  3. Dynamic characterization and active control of unstarts in a near-isentropic supersonic inlet

    E-Print Network [OSTI]

    Ahsun, Umair, 1972-

    2004-01-01T23:59:59.000Z

    A near-isentropic supersonic inlet, at Mach 2.2, has been designed to give enhanced recovery and thus increased range for a supersonic transport aircraft. In such a design a mixed compression inlet design is typically used. ...

  4. Seal inlet disturbance boundary conditions for rotordynamic models and influence of some off-design conditions on labyrinth rotordynamic instability

    E-Print Network [OSTI]

    Xi, Jinxiang

    2007-04-25T23:59:59.000Z

    Systematic parametric studies were performed to better understand seal-inlet rotordynamics. A CFD-perturbation model was employed to compute the seal-inlet flow disturbance quantities. Seal inlet disturbance boundary condition correlations were...

  5. Assessment of Inlet Cooling to Enhance Output of a Fleet of Gas Turbines 

    E-Print Network [OSTI]

    Wang, T.; Braquet, L.

    2008-01-01T23:59:59.000Z

    An analysis was made to assess the potential enhancement of a fleet of 14 small gas turbines' power output by employing an inlet air cooling scheme at a gas process plant. Various gas turbine (GT) inlet air cooling schemes were reviewed. The inlet...

  6. Assessment of Inlet Cooling to Enhance Output of a Fleet of Gas Turbines

    E-Print Network [OSTI]

    Wang, T.; Braquet, L.

    2008-01-01T23:59:59.000Z

    An analysis was made to assess the potential enhancement of a fleet of 14 small gas turbines' power output by employing an inlet air cooling scheme at a gas process plant. Various gas turbine (GT) inlet air cooling schemes were reviewed. The inlet...

  7. assurance filter penetration: Topics by E-print Network

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

    filtration using fibrous filters is a well-known approach for the separation of water-in-oil emulsions. Many factors have an effect on the performance of coalescing filters...

  8. Preliminary evaluation of wind energy potential: Cook Inlet area, Alaska

    SciTech Connect (OSTI)

    Hiester, T.R.

    1980-06-01T23:59:59.000Z

    This report summarizes work on a project performed under contract to the Alaska Power Administration (APA). The objective of this research was to make a preliminary assessment of the wind energy potential for interconnection with the Cook Inlet area electric power transmission and distribution systems, to identify the most likely candidate regions (25 to 100 square miles each) for energy potential, and to recommend a monitoring program sufficient to quantify the potential.

  9. Optimizing performance of ceramic pot filters in Northern Ghana and modeling flow through paraboloid-shaped filters/

    E-Print Network [OSTI]

    Miller, Travis Reed

    2010-01-01T23:59:59.000Z

    This work aimed to inform the design of ceramic pot filters to be manufactured by the organization Pure Home Water (PHW) in Northern Ghana, and to model the flow through an innovative paraboloid-shaped ceramic pot filter. ...

  10. Novel Quaternion Kalman Filter

    E-Print Network [OSTI]

    Choukroun, Daniel; Bar-Itzhack, Itzhack Y.; Oshman, Yaakov

    2006-01-01T23:59:59.000Z

    F. L. , and Shuster, M. D. Kalman filtering for spacecraftOshman, Y. A novel quaternion Kalman filter. TAE Report 930,errors, a typical extended Kalman filter (EKF) fails to

  11. Novel quaternion Kalman filter

    E-Print Network [OSTI]

    Choukroun, D; Bar-Itzhack, I Y; Oshman, Y

    2006-01-01T23:59:59.000Z

    F. L. , and Shuster, M. D. Kalman filtering for spacecraftOshman, Y. A novel quaternion Kalman filter. TAE Report 930,errors, a typical extended Kalman filter (EKF) fails to

  12. Environmental continuous air monitor inlet with combined preseparator and virtual impactor

    DOE Patents [OSTI]

    Rodgers, John C. (Santa Fe, NM)

    2007-06-19T23:59:59.000Z

    An inlet for an environmental air monitor is described wherein a pre-separator interfaces with ambient environment air and removes debris and insects commonly associated with high wind outdoors and a deflector plate in communication with incoming air from the pre-separator stage, that directs the air radially and downward uniformly into a plurality of accelerator jets located in a manifold of a virtual impactor, the manifold being cylindrical and having a top, a base, and a wall, with the plurality of accelerator jets being located in the top of the manifold and receiving the directed air and accelerating directed air, thereby creating jets of air penetrating into the manifold, where a major flow is deflected to the walls of the manifold and extracted through ports in the walls. A plurality of receiver nozzles are located in the base of the manifold coaxial with the accelerator jets, and a plurality of matching flow restrictor elements are located in the plurality of receiver nozzles for balancing and equalizing the total minor flow among all the plurality of receiver nozzles, through which a lower, fractional flow extracts large particle constituents of the air for collection on a sample filter after passing through the plurality of receiver nozzles and the plurality of matching flow restrictor elements.

  13. Removal of Particles and Acid Gases (SO2 or HCl) with a Ceramic Filter by Addition of Dry Sorbents

    SciTech Connect (OSTI)

    Hemmer, G.; Kasper, G.; Wang, J.; Schaub, G.

    2002-09-20T23:59:59.000Z

    The present investigation intends to add to the fundamental process design know-how for dry flue gas cleaning, especially with respect to process flexibility, in cases where variations in the type of fuel and thus in concentration of contaminants in the flue gas require optimization of operating conditions. In particular, temperature effects of the physical and chemical processes occurring simultaneously in the gas-particle dispersion and in the filter cake/filter medium are investigated in order to improve the predictive capabilities for identifying optimum operating conditions. Sodium bicarbonate (NaHCO{sub 3}) and calcium hydroxide (Ca(OH){sub 2}) are known as efficient sorbents for neutralizing acid flue gas components such as HCl, HF, and SO{sub 2}. According to their physical properties (e.g. porosity, pore size) and chemical behavior (e.g. thermal decomposition, reactivity for gas-solid reactions), optimum conditions for their application vary widely. The results presented concentrate on the development of quantitative data for filtration stability and overall removal efficiency as affected by operating temperature. Experiments were performed in a small pilot unit with a ceramic filter disk of the type Dia-Schumalith 10-20 (Fig. 1, described in more detail in Hemmer 2002 and Hemmer et al. 1999), using model flue gases containing SO{sub 2} and HCl, flyash from wood bark combustion, and NaHCO{sub 3} as well as Ca(OH){sub 2} as sorbent material (particle size d{sub 50}/d{sub 84} : 35/192 {micro}m, and 3.5/16, respectively). The pilot unit consists of an entrained flow reactor (gas duct) representing the raw gas volume of a filter house and the filter disk with a filter cake, operating continuously, simulating filter cake build-up and cleaning of the filter medium by jet pulse. Temperatures varied from 200 to 600 C, sorbent stoichiometric ratios from zero to 2, inlet concentrations were on the order of 500 to 700 mg/m{sup 3}, water vapor contents ranged from zero to 20 vol%. The experimental program with NaHCO{sub 3} is listed in Table 1. In addition, model calculations were carried out based on own and published experimental results that estimate residence time and temperature effects on removal efficiencies.

  14. Optofluidic-Tunable Color Filters And Spectroscopy Based On Liquid-Crystal Microflows

    SciTech Connect (OSTI)

    Cuennet, J. G.; Vasdekis, Andreas E.; Psaltis, D.

    2013-05-24T23:59:59.000Z

    The integration of color filters with microfluidics has attracted substantial attention in recent years, for on-chip absorption, fluorescence, or Raman analysis. We describe such tunable filters based on the micro-flow of liquid crystals. The filter operation is based on the wavelength dependent liquid crystal birefringence that can be tuned by modifying the flow velocity field in the microchannel. The latter is possible both temporally and spatially by varying the inlet pressure and the channel geometry respectively. We explored the use of these optofluidic filters for on-chip absorption spectroscopy; by integrating the distance dependent color filter with a dye-filled micro-channel, the absorption spectrum of a dye could be measured. Liquid crystal microflows simplify substantially the optofluidic integration, actuation and tuning of color filters for lab-on-a-chip spectroscopic applications.

  15. Electrically resistive coating for remediation (regeneration) of a diesel particulate filter and method

    DOE Patents [OSTI]

    Phelps, Amanda C. (Malibu, CA); Kirby, Kevin K. (Calabasas Hills, CA); Gregoire, Daniel J. (Thousand Oaks, CA)

    2012-02-14T23:59:59.000Z

    A resistively heated diesel particulate filter (DPF). The resistively heated DPF includes a DPF having an inlet surface and at least one resistive coating on the inlet surface. The at least one resistive coating is configured to substantially maintain its resistance in an operating range of the DPF. The at least one resistive coating has a first terminal and a second terminal for applying electrical power to resistively heat up the at least one resistive coating in order to increase the temperature of the DPF to a regeneration temperature. The at least one resistive coating includes metal and semiconductor constituents.

  16. Hepa filter dissolution process

    DOE Patents [OSTI]

    Brewer, Ken N. (Arco, ID); Murphy, James A. (Idaho Falls, ID)

    1994-01-01T23:59:59.000Z

    A process for dissolution of spent high efficiency particulate air (HEPA) filters and then combining the complexed filter solution with other radioactive wastes prior to calcining the mixed and blended waste feed. The process is an alternate to a prior method of acid leaching the spent filters which is an inefficient method of treating spent HEPA filters for disposal.

  17. HEPA filter dissolution process

    DOE Patents [OSTI]

    Brewer, K.N.; Murphy, J.A.

    1994-02-22T23:59:59.000Z

    A process is described for dissolution of spent high efficiency particulate air (HEPA) filters and then combining the complexed filter solution with other radioactive wastes prior to calcining the mixed and blended waste feed. The process is an alternate to a prior method of acid leaching the spent filters which is an inefficient method of treating spent HEPA filters for disposal. 4 figures.

  18. Recirculating electric air filter

    DOE Patents [OSTI]

    Bergman, W.

    1985-01-09T23:59:59.000Z

    An electric air filter cartridge has a cylindrical inner high voltage electrode, a layer of filter material, and an outer ground electrode formed of a plurality of segments moveably connected together. The outer electrode can be easily opened to remove or insert filter material. Air flows through the two electrodes and the filter material and is exhausted from the center of the inner electrode.

  19. Mass independent kinetic energy reducing inlet system for vacuum environment

    DOE Patents [OSTI]

    Reilly, Peter T.A.

    2014-05-13T23:59:59.000Z

    A particle inlet system comprises a first chamber having a limiting orifice for an incoming gas stream and a micrometer controlled expansion slit. Lateral components of the momentum of the particles are substantially cancelled due to symmetry of the configuration once the laminar flow converges at the expansion slit. The particles and flow into a second chamber, which is maintained at a lower pressure than the first chamber, and then moves into a third chamber including multipole guides for electromagnetically confining the particle. The vertical momentum of the particles descending through the center of the third chamber is minimized as an upward stream of gases reduces the downward momentum of the particles. The translational kinetic energy of the particles is near-zero irrespective of the mass of the particles at an exit opening of the third chamber, which may be advantageously employed to provide enhanced mass resolution in mass spectrometry.

  20. Mass independent kinetic energy reducing inlet system for vacuum environment

    DOE Patents [OSTI]

    Reilly, Peter T. A. [Knoxville, TN

    2010-12-14T23:59:59.000Z

    A particle inlet system comprises a first chamber having a limiting orifice for an incoming gas stream and a micrometer controlled expansion slit. Lateral components of the momentum of the particles are substantially cancelled due to symmetry of the configuration once the laminar flow converges at the expansion slit. The particles and flow into a second chamber, which is maintained at a lower pressure than the first chamber, and then moves into a third chamber including multipole guides for electromagnetically confining the particle. The vertical momentum of the particles descending through the center of the third chamber is minimized as an upward stream of gases reduces the downward momentum of the particles. The translational kinetic energy of the particles is near-zero irrespective of the mass of the particles at an exit opening of the third chamber, which may be advantageously employed to provide enhanced mass resolution in mass spectrometry.

  1. Mass independent kinetic energy reducing inlet system for vacuum environment

    DOE Patents [OSTI]

    Reilly, Peter T.A.

    2013-12-03T23:59:59.000Z

    A particle inlet system comprises a first chamber having a limiting orifice for an incoming gas stream and a micrometer controlled expansion slit. Lateral components of the momentum of the particles are substantially cancelled due to symmetry of the configuration once the laminar flow converges at the expansion slit. The particles and flow into a second chamber, which is maintained at a lower pressure than the first chamber, and then moves into a third chamber including multipole guides for electromagnetically confining the particle. The vertical momentum of the particles descending through the center of the third chamber is minimized as an upward stream of gases reduces the downward momentum of the particles. The translational kinetic energy of the particles is near-zero irrespective of the mass of the particles at an exit opening of the third chamber, which may be advantageously employed to provide enhanced mass resolution in mass spectrometry.

  2. Household ceramic water filter evaluation using three simple low-cost methods : membrane filtration, 3M Petrifilm and hydrogen sulfide bacteria in northern region, Ghana

    E-Print Network [OSTI]

    Mattelet, Claire (Claire Eliane H. Y.)

    2006-01-01T23:59:59.000Z

    Drinking water continues to be a major source of waterborne diseases and death in the world because many points of water collection remain unsafe. This thesis reports high level of fecal contamination found in rivers and ...

  3. Distribution of Clay Minerals in Lower Cook Inlet and Kodiak Shelf Sediment, Alaska

    E-Print Network [OSTI]

    Distribution of Clay Minerals in Lower Cook Inlet and Kodiak Shelf Sediment, Alaska James R. llein-five surface samples from lower Cook Inlet and forty-three from Kodiak shelf, Alaska, were analyzed for clay percentages of clay minerals. This is because modern ocean currents vigorously rework surficial sediment

  4. To appear: Proceedings 2002 National Conference on Beach Preservation Technology, FSBPA. FEDERAL INLETS DATABASE

    E-Print Network [OSTI]

    US Army Corps of Engineers

    To appear: Proceedings 2002 National Conference on Beach Preservation Technology, FSBPA. FEDERAL and unpublished knowledge of specific inlets in the United States. INTRODUCTION The U.S. Army Corps of Engineers to fully populate it. The Federal Inlets Database will 1) Applied Technology and Management, Inc., 2770 NW

  5. COASTAL ENGINEERING 2012 DREDGING OPTIMIZATION OF AN INLET SYSTEM FOR ADJACENT SHORE

    E-Print Network [OSTI]

    US Army Corps of Engineers

    COASTAL ENGINEERING 2012 1 DREDGING OPTIMIZATION OF AN INLET SYSTEM FOR ADJACENT SHORE PROTECTION of this study is to investigate optimal dredging volumes and intervals, and to determine the beach placement mining at St. Augustine Inlet over 1.4-year simulations. Results determined that dredging scenarios under

  6. Filter type gas sampler with filter consolidation

    DOE Patents [OSTI]

    Miley, Harry S. (219 Rockwood Dr., Richland, WA 99352); Thompson, Robert C. (5313 Phoebe La., West Richland, WA 99352); Hubbard, Charles W. (1900 Stevens, Apt. 526, Richland, WA 99352); Perkins, Richard W. (1413 Sunset, Richland, WA 99352)

    1997-01-01T23:59:59.000Z

    Disclosed is an apparatus for automatically consolidating a filter or, more specifically, an apparatus for drawing a volume of gas through a plurality of sections of a filter, whereafter the sections are subsequently combined for the purpose of simultaneously interrogating the sections to detect the presence of a contaminant.

  7. Filter type gas sampler with filter consolidation

    DOE Patents [OSTI]

    Miley, H.S.; Thompson, R.C.; Hubbard, C.W.; Perkins, R.W.

    1997-03-25T23:59:59.000Z

    Disclosed is an apparatus for automatically consolidating a filter or, more specifically, an apparatus for drawing a volume of gas through a plurality of sections of a filter, where after the sections are subsequently combined for the purpose of simultaneously interrogating the sections to detect the presence of a contaminant. 5 figs.

  8. Ambient Monitoring for Sinclair and Dyes Inlets, Puget Sound, Washington: Chemical Analyses for 2010 Regional Mussel Watch (AMB02)

    SciTech Connect (OSTI)

    Brandenberger, Jill M.; Kuo, Li-Jung; Suslick, Carolynn R.; Johnston, Robert K.

    2010-10-20T23:59:59.000Z

    The Puget Sound Naval Shipyard & Intermediate Maintenance Facility (PSNS&IMF) and Naval Base Kitsap-Bremerton (Shipyard) located in Bremerton, WA are committed to a culture of continuous process improvement for all aspects of Shipyard operations, including reducing the releases of hazardous materials and waste in discharges from the Shipyard. Under the Project ENVVEST Final Project Agreement, a cooperative project among PSNS&IMF, the Environmental Protection Agency (EPA), and the Washington State Department of Ecology (Ecology), and local stakeholders (US Navy, EPA and Ecology 2002) has been helping to improve the environmental quality of the Sinclair and Dyes Inlet Watershed (ENVVEST 2006). An ambient monitoring program for sediment, water, and indigenous mussels began in 2009 to assess the status and trend of ecological resources, assess the effectiveness of cleanup and pollution control measures, and determine if discharges from all sources are protective of beneficial uses including aquatic life. This document presents the 2010 chemical residue data and stable isotopes of carbon (?13C) and nitrogen (?15N) for the regional mussel watch stations located in Sinclair Inlet, Dyes Inlet, Port Orchard Passage, Rich Passage, Agate Passage, Liberty Bay, and Keyport Lagoon. Indigenous bivalves were collected from a small boat and/or from along the shoreline, measured, composited, and analyzed for a suite of trace metals and organic contaminants. The trace metals included silver, arsenic, cadmium, chromium, copper, mercury, nickel, lead, and zinc. The organic contaminants included the list of NOAA Status and Trends 20 polychlorinated biphenyls (PCB) congeners and suite of parent and methylated polycyclic aromatic hydrocarbons (PAHs). These chemical residue data provide the first year of the biota ambient monitoring.

  9. Filter for on-line air monitor unaffected by radon progeny and method of using same

    DOE Patents [OSTI]

    Phillips, Terrance D. (Aiken, SC); Edwards, Howard D. (Augusta, GA)

    1999-01-01T23:59:59.000Z

    An apparatus for testing air having contaminants and radon progeny therein. The apparatus includes a sampling box having an inlet for receiving the air and an outlet for discharging the air. The sampling box includes a filter made of a plate of sintered stainless steel. The filter traps the contaminants, yet allows at least a portion of the radon progeny to pass therethrough. A method of testing air having contaminants and radon progeny therein. The method includes providing a testing apparatus that has a sampling box with an inlet for receiving the air and an outlet for discharging the air, and has a sintered stainless steel filter disposed within said sampling box; drawing air from a source into the sampling box using a vacuum pump; passing the air through the filter; monitoring the contaminants trapped by the filter; and providing an alarm when a selected level of contaminants is reached. The filter traps the contaminants, yet allows at least a portion of the radon progeny to pass therethrough.

  10. A comparative analysis of the pelvic inlet and body weight of beef females and the relationship to dystocia

    E-Print Network [OSTI]

    Bennett, Frances Annette

    1973-01-01T23:59:59.000Z

    toward enlarging the maternal pelvic inlet in order to reduce dystocia. To determine if selection can be utilized to obtain the more desirable pelvic inlet, the inlet and factors which are associated with its size and shape were examined. Only... and weight are related to the size and shape of the maternal pelvic inlet. For purposes of this paper, studies of differences in dystocia rates due to maternal factors are used to reflect differences in maternal pel- vic conformation. Realizing...

  11. HEPA filter encapsulation

    DOE Patents [OSTI]

    Gates-Anderson, Dianne D. (Union City, CA); Kidd, Scott D. (Brentwood, CA); Bowers, John S. (Manteca, CA); Attebery, Ronald W. (San Lorenzo, CA)

    2003-01-01T23:59:59.000Z

    A low viscosity resin is delivered into a spent HEPA filter or other waste. The resin is introduced into the filter or other waste using a vacuum to assist in the mass transfer of the resin through the filter media or other waste.

  12. Filter service system

    DOE Patents [OSTI]

    Sellers, Cheryl L. (Peoria, IL); Nordyke, Daniel S. (Arlington Heights, IL); Crandell, Richard A. (Morton, IL); Tomlins, Gregory (Peoria, IL); Fei, Dong (Peoria, IL); Panov, Alexander (Dunlap, IL); Lane, William H. (Chillicothe, IL); Habeger, Craig F. (Chillicothe, IL)

    2008-12-09T23:59:59.000Z

    According to an exemplary embodiment of the present disclosure, a system for removing matter from a filtering device includes a gas pressurization assembly. An element of the assembly is removably attachable to a first orifice of the filtering device. The system also includes a vacuum source fluidly connected to a second orifice of the filtering device.

  13. Swozzle based burner tube premixer including inlet air conditioner for low emissions combustion

    DOE Patents [OSTI]

    Tuthill, Richard Sterling (Bolton, CT); Bechtel, II, William Theodore (Scotia, NY); Benoit, Jeffrey Arthur (Scotia, NY); Black, Stephen Hugh (Duanesburg, NY); Bland, Robert James (Clifton Park, NY); DeLeonardo, Guy Wayne (Scotia, NY); Meyer, Stefan Martin (Troy, NY); Taura, Joseph Charles (Clifton Park, NY); Battaglioli, John Luigi (Glenville, NY)

    2002-01-01T23:59:59.000Z

    A burner for use in a combustion system of a heavy-duty industrial gas turbine includes a fuel/air premixer having an air inlet, a fuel inlet, and an annular mixing passage. The fuel/air premixer mixes fuel and air into a uniform mixture for injection into a combustor reaction zone. The burner also includes an inlet flow conditioner disposed at the air inlet of the fuel/air premixer for controlling a radial and circumferential distribution of incoming air. The pattern of perforations in the inlet flow conditioner is designed such that a uniform air flow distribution is produced at the swirler inlet annulus in both the radial and circumference directions. The premixer includes a swozzle assembly having a series of preferably air foil shaped turning vanes that impart swirl to the airflow entering via the inlet flow conditioner. Each air foil contains internal fuel flow passages that introduce natural gas fuel into the air stream via fuel metering holes that pass through the walls of the air foil shaped turning vanes. By injecting fuel in this manner, an aerodynamically clean flow field is maintained throughout the premixer. By injecting fuel via two separate passages, the fuel/air mixture strength distribution can be controlled in the radial direction to obtain optimum radial concentration profiles for control of emissions, lean blow outs, and combustion driven dynamic pressure activity as machine and combustor load are varied.

  14. Means for positively seating a piezoceramic element in a piezoelectric valve during inlet gas injection

    DOE Patents [OSTI]

    Wright, K.E.

    1994-08-23T23:59:59.000Z

    A piezoelectric valve in a gas delivery system includes a piezoceramic element bonded to a valve seal and disposed over a valve seat, and retained in position by an O-ring and a retainer; an insulating ball normally biased by a preload spring against the piezoceramic element; an inlet gas port positioned such that upon admission of inlet gas into the valve, the piezoceramic element is positively seated. The inlet gas port is located only on the side of the piezoceramic element opposite the seal. 3 figs.

  15. Ambient Monitoring for Sinclair and Dyes Inlets, Puget Sound, Washington: Chemical Analyses for 2012 Regional Mussel Watch

    SciTech Connect (OSTI)

    Brandenberger, Jill M.; Kuo, Li-Jung; Suslick, Carolynn R.; Johnston, Robert K.

    2012-09-01T23:59:59.000Z

    Under the Project ENVVEST Final Project Agreement, the Puget Sound Naval Shipyard & Intermediate Maintenance Facility (PSNS&IMF), Environmental Protection Agency (EPA), Washington State Department of Ecology (Ecology), and local stakeholders have worked collaboratively to improve the environmental quality of Sinclair and Dyes Inlets. A regional mussel monitoring program began in 2010 to assess the status and trend of ecological resources, assess the effectiveness of cleanup and pollution control measures, and determine if discharges from all sources are protective of beneficial uses including aquatic life. The program collected indigenous mussels to represent a time-integrated measure of bioavailable metals and organic chemicals present in the water column. This document supplements the 2010 indigenous mussel data with 2012 data to provide two years of data on the chemical residue of mussels present in the inter-tidal regions of Sinclair Inlet, Dyes Inlet, Port Orchard Passage, Rich Passage, Agate Passage, Liberty Bay, and Keyport Lagoon. The 2012 data set added one station at PSNS&IMF and one market samples from Penn Cove. Indigenous mussels were collected from a small boat and/or from along the shoreline, measured, composited, and analyzed for percent lipids, percent moisture, stable isotopes of carbon and nitrogen, and a suite of trace metals and organic contaminants. The trace metals included silver (Ag), arsenic (As), cadmium (Cd), copper (Cu), mercury (Hg), lead (Pb), and zinc (Zn). The organic contaminants included the list of NOAA Status and Trends 20 polychlorinated biphenyls (PCB) congeners and suite of parent and methylated polycyclic aromatic hydrocarbons (PAHs). The average lengths between the 2010 and 2012 data were generally less than 30% relative percent difference (RPD). Generally, the metals concentrations were lower in 2012 than 2010 with some notable exceptions in Sinclair Inlet and Rich Passage where increases in Ag, Hg, Pb, Cu, and Zn exceeded an RPD of 50% between years. However, they did not exceed the bioaccumulation critical values or the critical body residues corresponding to the no observed effect dose (NOED) and the lowest observed effect dose (LOED) with one exception. The Cd concentrations exceeded the NOED and LOED for the Manchester Lab Pier and the Pike Place Market samples. For the PAHs and PCB, the 2012 data were generally lower than 2010 and some cases significantly lower for PAHs and none of the available invertebrate benchmarks were exceeded.

  16. Evaluation of the complementary use of the ceramic (Kosim) filter and Aquatabs in Northern Region, Ghana

    E-Print Network [OSTI]

    Swanton, Andrew A

    2008-01-01T23:59:59.000Z

    The Kosim filter is a ceramic water filter that is currently used in Northern Ghana. Based on prior MIT research in Northern Ghana, this technology is effective at removing 92% of turbidity, 99.4% of total coliforms, and ...

  17. March 22, 2004 EAS 4/8803 1 Separating PM2.5 at Sample Inlet

    E-Print Network [OSTI]

    Weber, Rodney

    March 22, 2004 EAS 4/8803 1 Separating PM2.5 at Sample Inlet Classical Cyclone Sharp Cut Cyclone medium is extracted separately for direct quantification of: NH3, HONO, HNO3, SO2, Formic, Acetic, Oxalic

  18. Performance improvement of Gas-Liquid Cylindrical Cyclone separator using different design for tangential inlet

    E-Print Network [OSTI]

    Barbuceanu, Nicolae

    2001-01-01T23:59:59.000Z

    separators often rely on centrifugal forces to enhance the separation process and are therefore highly dependent on inlet geometry. This paper investigates expanding the operational envelope of a compact Gas-Liquid Cylindrical Cyclone separator through...

  19. Particle image velocimetry in an advanced, serpentine jet engine inlet duct

    E-Print Network [OSTI]

    Tichenor, Nathan Ryan

    2009-05-15T23:59:59.000Z

    The overarching objective of this research project was to gain improved basic understanding of the fluid mechanisms governing the development of secondary flow structures in complex, three-dimensional inlet ducts. To accomplish this objective...

  20. Hydraulic properties of an artificial tidal inlet through a Texas barrier beach

    E-Print Network [OSTI]

    Prather, Stanley Harold

    1972-01-01T23:59:59.000Z

    HYDRAULIC PROPERTIES OF AN ARTIFICIAL TIDAL INLET THROUGH A TEXAS BARRIER BEACH A Thesis by STANLEY HAROLD PRATHER Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirement for the degree of MASTER... OF SCIENCE August 1972 Major Sub]ect: Civil Engineering HYDRAULIC PROPERTIES OF AN ARTIFICIAL TIDAL INLET THROUGH A TEXAS BARRIER BEACH A Thesis by STANLEY HAROLD PRATHER Approved as to style and content by: (Chairman of Committee) (( (Head...

  1. Filter holder and gasket assembly for candle or tube filters

    DOE Patents [OSTI]

    Lippert, T.E.; Alvin, M.A.; Bruck, G.J.; Smeltzer, E.E.

    1999-03-02T23:59:59.000Z

    A filter holder and gasket assembly are disclosed for holding a candle filter element within a hot gas cleanup system pressure vessel. The filter holder and gasket assembly includes a filter housing, an annular spacer ring securely attached within the filter housing, a gasket sock, a top gasket, a middle gasket and a cast nut. 9 figs.

  2. ?1 Trend Filtering

    E-Print Network [OSTI]

    2007-09-28T23:59:59.000Z

    H-P filtering is supported in several standard software packages for statistical data ...... Journal of the American Statistical Association, 76(374):374–378,. 1981.

  3. Integration of air separation membrane and coalescing filter for use on an inlet air system of an engine

    DOE Patents [OSTI]

    Moncelle, Michael E. (Bloomington, IL)

    2003-01-01T23:59:59.000Z

    An intake air separation system suitable for combustion air of an internal combustion engine. An air separation device of the system includes a plurality of fibers, each fiber having a tube with a permeation barrier layer on the outer surface thereof and a coalescing layer on the inner surface thereof, to restrict fluid droplets from contacting the permeation barrier layer.

  4. Water-heating dehumidifier

    DOE Patents [OSTI]

    Tomlinson, John J. (Knoxville, TN)

    2006-04-18T23:59:59.000Z

    A water-heating dehumidifier includes a refrigerant loop including a compressor, at least one condenser, an expansion device and an evaporator including an evaporator fan. The condenser includes a water inlet and a water outlet for flowing water therethrough or proximate thereto, or is affixed to the tank or immersed into the tank to effect water heating without flowing water. The immersed condenser design includes a self-insulated capillary tube expansion device for simplicity and high efficiency. In a water heating mode air is drawn by the evaporator fan across the evaporator to produce cooled and dehumidified air and heat taken from the air is absorbed by the refrigerant at the evaporator and is pumped to the condenser, where water is heated. When the tank of water heater is full of hot water or a humidistat set point is reached, the water-heating dehumidifier can switch to run as a dehumidifier.

  5. Sintered composite filter

    DOE Patents [OSTI]

    Bergman, W.

    1986-05-02T23:59:59.000Z

    A particulate filter medium formed of a sintered composite of 0.5 micron diameter quartz fibers and 2 micron diameter stainless steel fibers is described. Preferred composition is about 40 vol.% quartz and about 60 vol.% stainless steel fibers. The media is sintered at about 1100/sup 0/C to bond the stainless steel fibers into a cage network which holds the quartz fibers. High filter efficiency and low flow resistance are provided by the smaller quartz fibers. High strength is provided by the stainless steel fibers. The resulting media has a high efficiency and low pressure drop similar to the standard HEPA media, with tensile strength at least four times greater, and a maximum operating temperature of about 550/sup 0/C. The invention also includes methods to form the composite media and a HEPA filter utilizing the composite media. The filter media can be used to filter particles in both liquids and gases.

  6. Kalman Filtering with Intermittent Observations

    E-Print Network [OSTI]

    Jordan, Michael I.

    1 Kalman Filtering with Intermittent Observations Bruno Sinopoli, Luca Schenato, Massimo within sensor networks, we consider the prob- lem of performing Kalman filtering with intermittent be neglected. We address this problem starting from the discrete Kalman filtering formulation, and modelling

  7. System for enhanced longevity of in situ microbial filter used for bioremediation

    DOE Patents [OSTI]

    Carman, M. Leslie (San Ramon, CA); Taylor, Robert T. (Roseville, CA)

    2000-01-01T23:59:59.000Z

    An improved method for in situ microbial filter bioremediation having increasingly operational longevity of an in situ microbial filter emplaced into an aquifer. A method for generating a microbial filter of sufficient catalytic density and thickness, which has increased replenishment interval, improved bacteria attachment and detachment characteristics and the endogenous stability under in situ conditions. A system for in situ field water remediation.

  8. Method for enhanced longevity of in situ microbial filter used for bioremediation

    DOE Patents [OSTI]

    Carman, M. Leslie (San Ramon, CA); Taylor, Robert T. (Roseville, CA)

    1999-01-01T23:59:59.000Z

    An improved method for in situ microbial filter bioremediation having increasingly operational longevity of an in situ microbial filter emplaced into an aquifer. A method for generating a microbial filter of sufficient catalytic density and thickness, which has increased replenishment interval, improved bacteria attachment and detachment characteristics and the endogenous stability under in situ conditions. A system for in situ field water remediation.

  9. The study of an optimum method for inlet port performance in a D.I. diesel engine

    SciTech Connect (OSTI)

    Qi, G.; Zhou, J.; Liu, Z.; Chen, J. [Dalian Univ. of Technology (China)

    1995-12-31T23:59:59.000Z

    A new concept of synthetic performance coefficient of inlet port in D.I. diesel engines has been proposed from a viewpoint of efficiency of energy conversion in this paper. It makes the performance of various kinds of inlet ports in D.I. diesel engines compared with each other. Based on the regression analysis of the experimental results, it is found that the synthetic performance coefficient of inlet port has a close linear relation to the engine performance, and it can be used as a criterion to optimize the design of inlet port in D.I. diesel engines.

  10. A study of fractionating inlet systems for the dichotomous air sampler 

    E-Print Network [OSTI]

    Ripps, Gerald Joseph

    1979-01-01T23:59:59.000Z

    . 1 51 TABLE B-2 El'FECT OF CONE INLET SPACING, D = 14. 1 pm Cone Designation (Toy ? Bottom) 60-45 Spacing 'x' (cm 0. 5 Wind Speed ) (Km/hr. ) Effectiveness (0) 34. 2 33. 4 60-45 1. 0 38. 3 36. 2 56. 0 56. 6 73. 2 77. 0 60-45 2. 0... 24 24 43. 1 43. 2 61. 8 61. 1 60 Flat. -45 1. 0 86. 0 85. 7 58. 5 57. 5 86. 5 89. 0 52 TABLE B-3 TESTS OF VARIOUS INLETS, D = 15 pm Inlet ape Critical Dimension Wind Speed (Km/Hr) Effectiveness (&) 45-30 Cone 10 cm 76. 7 78. 7...

  11. HEPA filter jointer

    SciTech Connect (OSTI)

    Hill, D.; Martinez, H.E.

    1998-02-01T23:59:59.000Z

    A HEPA filter jointer system was created to remove nitrate contaminated wood from the wooden frames of HEPA filters that are stored at the Rocky Flats Plant. A commercial jointer was chosen to remove the nitrated wood. The chips from the wood removal process are in the right form for caustic washing. The jointer was automated for safety and ease of operation. The HEPA filters are prepared for jointing by countersinking the nails with a modified air hammer. The equipment, computer program, and tests are described in this report.

  12. A comparative assessment of alternative combustion turbine inlet air cooling system

    SciTech Connect (OSTI)

    Brown, D.R.; Katipamula, S.; Konynenbelt, J.H.

    1996-02-01T23:59:59.000Z

    Interest in combustion turbine inlet air cooling (CTAC) has increased during the last few years as electric utilities face increasing demand for peak power. Inlet air cooling increases the generating capacity and decreases the heat rate of a combustion turbine during hot weather when the demand for electricity is generally the greatest. Several CTAC systems have been installed, but the general applicability of the concept and the preference for specific concepts is still being debated. Concurrently, Rocky Research of Boulder City, Nevada has been funded by the U.S. Department of Energy to conduct research on complex compound (ammoniated salt) chiller systems for low-temperature refrigeration applications.

  13. Ionization source utilizing a multi-capillary inlet and method of operation

    DOE Patents [OSTI]

    Smith, Richard D.; Kim, Taeman; Udseth, Harold R.

    2004-10-12T23:59:59.000Z

    A multi-capillary inlet to focus ions and other charged particles generated at or near atmospheric pressure into a relatively low pressure region, which allows increased conductance of ions and other charged particles. The multi-capillary inlet is juxtaposed between an ion source and the interior of an instrument maintained at near atmospheric pressure, it finds particular advantages when deployed to improve the ion transmission between an electrospray ionization source and the first vacuum stage of a mass spectrometer, and finds its greatest advantages when deployed in conjunction with an electrodynamic (RF) ion funnel deployed within the interior of the mass spectrometer, particularly an ion funnel equipped with a jet disturber.

  14. Westinghouse filter update

    SciTech Connect (OSTI)

    Lippert, T.E.; Bruck, G.J.; Smeltzer, E.E.; Newby, R.A.; Bachovchin, D.M. [Westinghouse Electric Corp., Pittsburgh, PA (United States). Science and Technology Center

    1993-09-01T23:59:59.000Z

    Hot gas filters have been implemented and operated in four different test facilities: Subpilot scale entrained gasifier, located at the Texaco Montebello Research facilities in California, Foster Wheeler Advanced Pressurized Fluidized Bed Combustion pilot plant facilities, located in Livingston, New Jersey, Slipstream of the American Electric Power (AEP) 70 MW (electric) Tidd-PFBC, located in Brilliant, Ohio, and in the Ahlstrom 10 MW (thermal) Circulating PFBC facility, located in Karhula, Finland. Candle filter testing has occurred at all four facilities; cross flow filter testing has occurred at the Texaco and Foster Wheeler facilities. Table 1 identifies and summarizes the key operating characteristics of these facilities and the type and scale of filter unit tested. A brief description of each project is given.

  15. Differential Filtering and Detexturing

    E-Print Network [OSTI]

    He, Lei

    2014-08-18T23:59:59.000Z

    introduce how to use bilateral filter appropriately on image texture removal by modifying its range image. While current existing methods either fail to remove the textures completely or over blur main structures, our method delivers best-in-class image...

  16. Differential Filtering and Detexturing 

    E-Print Network [OSTI]

    He, Lei

    2014-08-18T23:59:59.000Z

    introduce how to use bilateral filter appropriately on image texture removal by modifying its range image. While current existing methods either fail to remove the textures completely or over blur main structures, our method delivers best-in-class image...

  17. Startup and initial operation of a DFGD and pulse jet fabric filter system on Cokenergy's Indiana Harbor coke oven off gas system

    SciTech Connect (OSTI)

    Morris, W.J.; Gansley, R.R.; Schaddell, J.G.

    1999-07-01T23:59:59.000Z

    This paper describes the design, initial operation and performance testing of a Dry Flue Gas Desulfurization (DFGD) and Modular Pulse Jet Fabric Filter (MPJFF) system installed at Cokenergy's site in East Chicago, Indiana. The combined flue gas from the sixteen (16) waste heat recovery boilers is processed by the system to control emissions of sulfur dioxide and particulates. These boilers recover energy from coke oven off gas from Indiana Harbor Coke Company's coke batteries. The DFGD system consists of two 100% capacity absorbers. Each absorber vessel uses a single direct drive rotary atomizer to disperse the lime slurry for SO{sub 2} control. The MPJFF consists of thirty two (32) modules arranged in twin sixteen-compartment (16) units. The initial start up of the DFGD/MPJFF posed special operational issues due to the low initial gas flows through the system as the four coke oven batteries were cured and put in service for the first time. This occurred at approximately monthly intervals beginning in March 1998. A plan was implemented to perform a staged startup of the DFGD and MPJFF to coincide with the staged start up of the coke batteries and waste heat boilers. Operational issues that are currently being addressed include reliability of byproduct removal. Performance testing was conducted in August and September 1998 at the inlet of the system and the outlet stack. During these tests, particulate, SO{sub 2}, SO{sub 3}, and HCI emissions were measured simultaneously at the common DFGD inlet duct and the outlet stack. Measurements were also taken for average lime, water, and power consumption during the tests as well as system pressure losses. These results showed that all guarantee parameters were achieved during the test periods. The initial operation and performance testing are described in this paper.

  18. Remotely serviced filter and housing

    DOE Patents [OSTI]

    Ross, M.J.; Zaladonis, L.A.

    1987-07-22T23:59:59.000Z

    A filter system for a hot cell comprises a housing adapted for input of air or other gas to be filtered, flow of the air through a filter element, and exit of filtered air. The housing is tapered at the top to make it easy to insert a filter cartridge holds the filter element while the air or other gas is passed through the filter element. Captive bolts in trunnion nuts are readily operated by electromechanical manipulators operating power wrenches to secure and release the filter cartridge. The filter cartridge is adapted to make it easy to change a filter element by using a master-slave manipulator at a shielded window station. 6 figs.

  19. Filters for cathodic arc plasmas

    DOE Patents [OSTI]

    Anders, Andre (Albany, CA); MacGill, Robert A. (Richmond, CA); Bilek, Marcela M. M. (Engadine, AU); Brown, Ian G. (Berkeley, CA)

    2002-01-01T23:59:59.000Z

    Cathodic arc plasmas are contaminated with macroparticles. A variety of magnetic plasma filters has been used with various success in removing the macroparticles from the plasma. An open-architecture, bent solenoid filter, with additional field coils at the filter entrance and exit, improves macroparticle filtering. In particular, a double-bent filter that is twisted out of plane forms a very compact and efficient filter. The coil turns further have a flat cross-section to promote macroparticle reflection out of the filter volume. An output conditioning system formed of an expander coil, a straightener coil, and a homogenizer, may be used with the magnetic filter for expanding the filtered plasma beam to cover a larger area of the target. A cathodic arc plasma deposition system using this filter can be used for the deposition of ultrathin amorphous hard carbon (a-C) films for the magnetic storage industry.

  20. Lined sampling vessel including a filter to separate solids from liquids on exit

    DOE Patents [OSTI]

    Shurtliff, Rodney M. (Idaho Falls, ID); Klingler, Kerry M. (Idaho Falls, ID); Turner, Terry D. (Ammon, ID)

    2001-01-01T23:59:59.000Z

    A filtering apparatus has an open canister with an inlet port. A canister lid is provided which includes an outlet port for the passage of fluids from the canister. Liners are also provided which are shaped to fit the interiors of the canister and the lid, with at least the canister liner preferably being flexible. The sample to be filtered is positioned inside the canister liner, with the lid and lid liner being put in place thereafter. A filter element is located between the sample and the outlet port. Seals are formed between the canister liner and lid liner, and around the outlet port to prevent fluid leakage. A pressure differential is created between the canister and the canister liner so that the fluid in the sample is ejected from the outlet port and the canister liner collapses around the retained solids.

  1. Sensitivity of the Performance of a 3-Dimensional Hypersonic Inlet to Shape Deformations

    E-Print Network [OSTI]

    Alonso, Juan J.

    energy efficiency Shape parameter for combustor temperature profile Subscripts 0 Freestream 2 Entrance to isoloator, end of inlet 3 End of isolator, entrance to combustor 4 Exit of combustor 10 End of nozzle account- ing for a high degree of shape uncertainty under the extreme thermal and aerodynamic loads

  2. EBB-TIDAL DELTA DEVELOPMENT WHERE BEFORE THERE WAS NONE, SHARK RIVER INLET, NEW JERSEY

    E-Print Network [OSTI]

    US Army Corps of Engineers

    minor, infrequent maintenance dredging (every 7 to 10 years). Following large-scale beach nourishment at the inlet entrance, first from the south and then from the north, necessitating unplanned dredging MLW, dredging must now be done semi-annually in addition to the planned operational 2-3 year dredging

  3. Coastal Dynamics 2013 COASTAL INLET NAVIGATION RESEARCH IN THE U.S. ARMY CORPS OF ENGINEERS

    E-Print Network [OSTI]

    US Army Corps of Engineers

    of sediment was dredged at a cost of $1,322 Million. Of this total, roughly 84% was for channel maintenance manages over 40,000 km of coastal and inland navigation channels, dredging 174 Million cubic meters of sediment costing $1,322 Million in 2011. The Coastal Inlets Research Program (CIRP) advances the state

  4. Tidal inlet processes and deposits along a low energy coastline: easter Barataria Bight, Louisiana

    SciTech Connect (OSTI)

    Moslow, T.F.; Levin, D.R.

    1985-01-01T23:59:59.000Z

    Historical, seismic and vibracore data were used to determine the geologic framework of sand deposits along the predominantly muddy coastline of eastern Barataria Bight, Louisiana. Three inlet types with distinct sand body geometries and morphologies were identified and are found 1) at flanking barrier island systems spread laterally across the front of interdistributary bays; 2) in old distributary channels; 3) at overwash breaches; or 4) combination of these. Barataria Bight, a sheltered barrier island shoreline embayment with limited sand supply, minimal tidal range (36 cm) and low wave energies (30 cm) can be used to show examples of each inlet type. Barataria Pass and Quatre Bayou Pass are inlets located in old distributary channels. However, Barataria Pass has also been affected by construction between barrier islands. Pass Ronquille is located where the coastline has transgressed a low area in the delta plain. This breach is situated in a hydraulically efficient avenue between the Gulf and Bay Long behind it. Pass Abel is a combination of a low-profile barrier breach and the reoccupation of an old distributary channel. Shelf and shoreline sands are reworked from abandoned deltaic distributaries and headlands. Inner shelf sands are concentrated in thick (10 m) shore-normal relict distributary channels with fine grained cross-bedded and ripple laminated sand overlain by burrowed shelf muds. Shoreface sand deposits occur as 2-3 m thick, fine-grained, coarsening upward and burrowed ebb-tidal delta sequences and shore-parallel relict tidal inlet channels filled through lateral accretion.

  5. Comparison of two models of a Double Inlet Miniature Pulse Tube Refrigerator : Part B Electrical Analogy

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Inlet Pulse Tube Refrigerator is investigated by means of an analogy with an electric circuit) and experiments. The basic formulation of equivalent electronic components is discussed and a few improvements to avoid mechanical vibrations and magnetic fields. Therefore, a third capillary is used to link

  6. Filter component assessment

    SciTech Connect (OSTI)

    Alvin, M.A.; Lippert, T.E.; Diaz, E.S.; Smeltzer, E.W. [Westinghouse Electric Corp., Pittsburgh, PA (United States). Science and Technology Center

    1995-11-01T23:59:59.000Z

    The objectives of this program are to provide a more ruggedized filter system that utilizes porous ceramic filters which have improved resistance to damage resulting from crack propagation, thermal fatigue and/or thermal excursions during plant or process transient conditions, and/or mechanical ash bridging events within the candle filter array. As part of the current Phase 1, Task 1, effort of this program, Westinghouse is evaluating the filtration characteristics, mechanical integrity, and corrosion resistance of the following advanced or second generation candle filters for use in advanced coal-fired process applications: 3M CVI-SiC composite--chemical vapor infiltration of silicon carbide into an aluminosilicate Nextel{trademark} 312 fiber preform; DuPont PRD-66--filament wound candle filter structure containing corundum, cordierite, cristobalite, and mullite; DuPont SiC-SiC--chemical infiltration of silicon carbide into a silicon carbide Nicalon{trademark} fiber mat or felt preform; and IF and P Fibrosic{trademark}--vacuum infiltrated oxide-based chopped fibrous matrix. Results to date are presented.

  7. Measuring clay property variation and effects on ceramic pot filter performance

    E-Print Network [OSTI]

    Hester, Joshua (Joshua C.)

    2012-01-01T23:59:59.000Z

    Pure Home Water (PHW) is a non-profit organization in Ghana whose mission is to provide safe drinking water to Ghana's Northern Region - the poorest part of the country. Originally a distributor of ceramic pot filters ...

  8. Hemispheric ceramic pot filter evaluation and quality assurance program in Northern Ghana

    E-Print Network [OSTI]

    Miller, Matthew Rhodes

    2012-01-01T23:59:59.000Z

    Pure Home Water (PHW) is a non-profit based in Ghana that seeks to bring safe drinking water to those most in need in Northern Ghana through the production, sale, and distribution of ceramic pot filters (CPF) and other ...

  9. An experimental and analytical exploration of the effects of manufacturing parameters on ceramic pot filter performance

    E-Print Network [OSTI]

    Servi, Amelia Tepper

    2013-01-01T23:59:59.000Z

    Ceramic pot filters (CPF) are a promising low-cost option for household water treatment, providing a barrier of protection against-microbiological contaminants for households with or without reliable piped water supplies. ...

  10. Spectral diagonal ensemble Kalman filters

    E-Print Network [OSTI]

    Kasanický, Ivan; Vejmelka, Martin

    2015-01-01T23:59:59.000Z

    A new type of ensemble Kalman filter is developed, which is based on replacing the sample covariance in the analysis step by its diagonal in a spectral basis. It is proved that this technique improves the aproximation of the covariance when the covariance itself is diagonal in the spectral basis, as is the case, e.g., for a second-order stationary random field and the Fourier basis. The method is extended by wavelets to the case when the state variables are random fields, which are not spatially homogeneous. Efficient implementations by the fast Fourier transform (FFT) and discrete wavelet transform (DWT) are presented for several types of observations, including high-dimensional data given on a part of the domain, such as radar and satellite images. Computational experiments confirm that the method performs well on the Lorenz 96 problem and the shallow water equations with very small ensembles and over multiple analysis cycles.

  11. Fuel Efficient Diesel Particulate Filter (DPF) Modeling and Development

    SciTech Connect (OSTI)

    Stewart, Mark L.; Gallant, Thomas R.; Kim, Do Heui; Maupin, Gary D.; Zelenyuk, Alla

    2010-08-01T23:59:59.000Z

    The project described in this report seeks to promote effective diesel particulate filter technology with minimum fuel penalty by enhancing fundamental understanding of filtration mechanisms through targeted experiments and computer simulations. The overall backpressure of a filtration system depends upon complex interactions of particulate matter and ash with the microscopic pores in filter media. Better characterization of these phenomena is essential for exhaust system optimization. The acicular mullite (ACM) diesel particulate filter substrate is under continuing development by Dow Automotive. ACM is made up of long mullite crystals which intersect to form filter wall framework and protrude from the wall surface into the DPF channels. ACM filters have been demonstrated to effectively remove diesel exhaust particles while maintaining relatively low backpressure. Modeling approaches developed for more conventional ceramic filter materials, such as silicon carbide and cordierite, have been difficult to apply to ACM because of properties arising from its unique microstructure. Penetration of soot into the high-porosity region of projecting crystal structures leads to a somewhat extended depth filtration mode, but with less dramatic increases in pressure drop than are normally observed during depth filtration in cordierite or silicon carbide filters. Another consequence is greater contact between the soot and solid surfaces, which may enhance the action of some catalyst coatings in filter regeneration. The projecting crystals appear to provide a two-fold benefit for maintaining low backpressures during filter loading: they help prevent soot from being forced into the throats of pores in the lower porosity region of the filter wall, and they also tend to support the forming filter cake, resulting in lower average cake density and higher permeability. Other simulations suggest that soot deposits may also tend to form at the tips of projecting crystals due to the axial velocity component of exhaust moving down the filter inlet channel. Soot mass collected in this way would have a smaller impact on backpressure than soot forced into the flow restrictions deeper in the porous wall structure. This project has focused on the development of computational, analytical, and experimental techniques that are generally applicable to a wide variety of exhaust aftertreatment technologies. By helping to develop improved fundamental understanding pore-scale phenomena affecting filtration, soot oxidation, and NOX abatement, this cooperative research and development agreement (CRADA) has also assisted Dow Automotive in continuing development and commercialization of the ACM filter substrate. Over the course of this research project, ACM filters were successfully deployed on the Audi R10 TDI racecar which won the 24 Hours of LeMans endurance race in 2006, 2007, and 2008; and the 12 Hours of Sebring endurance race in 2006 and 2007. It would not have been possible for the R10 to compete in these traditionally gasoline-dominated events without reliable and effective exhaust particulate filtration. These successes demonstrated not only the performance of automotive diesel engines, but the efficacy of DPF technology as it was being deployed around the world to meet new emissions standards on consumer vehicles. During the course of this CRADA project, Dow Automotive commercialized their ACM DPF technology under the AERIFYTM DPF brand.

  12. Acoustic Monitoring of Beluga Whale Interactions with Cook Inlet Tidal Energy Project

    SciTech Connect (OSTI)

    Worthington, Monty [Project Director - AK] [Project Director - AK

    2014-02-05T23:59:59.000Z

    Cook Inlet, Alaska is home to some of the greatest tidal energy resources in the U.S., as well as an endangered population of beluga whales (Delphinapterus leucas). Successfully permitting and operating a tidal power project in Cook Inlet requires a biological assessment of the potential and realized effects of the physical presence and sound footprint of tidal turbines on the distribution, relative abundance, and behavior of Cook Inlet beluga whales. ORPC Alaska, working with the Project Team—LGL Alaska Research Associates, University of Alaska Anchorage, TerraSond, and Greeneridge Science—undertook the following U.S. Department of Energy (DOE) study to characterize beluga whales in Cook Inlet – Acoustic Monitoring of Beluga Whale Interactions with the Cook Inlet Tidal Energy Project (Project). ORPC Alaska, LLC, is a wholly-owned subsidiary of Ocean Renewable Power Company, LLC, (collectively, ORPC). ORPC is a global leader in the development of hydrokinetic power systems and eco-conscious projects that harness the power of ocean and river currents to create clean, predictable renewable energy. ORPC is developing a tidal energy demonstration project in Cook Inlet at East Foreland where ORPC has a Federal Energy Regulatory Commission (FERC) preliminary permit (P-13821). The Project collected baseline data to characterize pre-deployment patterns of marine mammal distribution, relative abundance, and behavior in ORPC’s proposed deployment area at East Foreland. ORPC also completed work near Fire Island where ORPC held a FERC preliminary permit (P-12679) until March 6, 2013. Passive hydroacoustic devices (previously utilized with bowhead whales in the Beaufort Sea) were adapted for study of beluga whales to determine the relative abundance of beluga whale vocalizations within the proposed deployment areas. Hydroacoustic data collected during the Project were used to characterize the ambient acoustic environment of the project site pre-deployment to inform the FERC pilot project process. The Project compared results obtained from this method to results obtained from other passive hydrophone technologies and to visual observation techniques performed simultaneously. This Final Report makes recommendations on the best practice for future data collection, for ORPC’s work in Cook Inlet specifically, and for tidal power projects in general. This Project developed a marine mammal study design and compared technologies for hydroacoustic and visual data collection with potential for broad application to future tidal and hydrokinetic projects in other geographic areas. The data collected for this Project will support the environmental assessment of future Cook Inlet tidal energy projects, including ORPC’s East Foreland Tidal Energy Project and any tidal energy developments at Fire Island. The Project’s rigorous assessment of technology and methodologies will be invaluable to the hydrokinetic industry for developing projects in an environmentally sound and sustainable way for areas with high marine mammal activity or endangered populations. By combining several different sampling methods this Project will also contribute to the future preparation of a comprehensive biological assessment of ORPC’s projects in Cook Inlet.

  13. Filter assembly for metallic and intermetallic tube filters

    DOE Patents [OSTI]

    Alvin, Mary Anne (113 Lehr Ave., Pittsburgh, PA 15223); Lippert, Thomas E. (3205 Cambridge Rd., Murrysville, PA 15668); Bruck, Gerald J. (4469 Sardis Rd., Murrysville, PA 15668); Smeltzer, Eugene E. (R.D. 7, Box 267-I, Italy Rd., Export, PA 15632-9621)

    2001-01-01T23:59:59.000Z

    A filter assembly (60) for holding a filter element (28) within a hot gas cleanup system pressure vessel is provided, containing: a filter housing (62), said filter housing having a certain axial length and having a peripheral sidewall, said sidewall defining an interior chamber (66); a one piece, all metal, fail-safe/regenerator device (68) within the interior chamber (66) of the filter housing (62) and/or extending beyond the axial length of the filter housing, said device containing an outward extending radial flange (71) within the filter housing for seating an essential seal (70), the device also having heat transfer media (72) disposed inside and screens (80) for particulate removal; one compliant gasket (70) positioned next to and above the outward extending radial flange of the fail-safe/regenerator device; and a porous metallic corrosion resistant superalloy type filter element body welded at the bottom of the metal fail-safe/regenerator device.

  14. Granular bed filter development program, Phase II. Quarterly report, January-March 1981

    SciTech Connect (OSTI)

    Moresco, L. L.; Ferguson, J.

    1981-08-01T23:59:59.000Z

    Phase I included the development of a mathematical model, a cold flow parametric test series in a 0.746 Nm/sup 3//s GBF, and investigations of potential dust plugging problems at the inlet screen. Collection efficiencies of 99% and filter outlet loadings less than 0.0074 g/m/sup 3/ were demonstrated. The objectives of Phase II are to investigate the effects of elevated temperature and coal combustion particulate on GBF filtration performance; to update the analytical model developed in Phase I to reflect high temperature effects; to optimize filter internal configuration; to perform parametric and long duration tests to characterize the effects of filter design improvements on filtration efficiencies. Hot flow testing to date has confirmed that the GBF configured with inlet and outlet screens has exhibited a tendency for extensive and irreversible ash plugging. The potential advantages of a screenless configuration, having higher filtration efficiency, has been confirmed. This report describes the continuation of work pertinent to the development and design improvement of the GBF system, specifically addressing: (1) the development of governing equations derived for the 3-dimensional GBF mathematical model; (2) the initial results of subcontracted experiments to establish correlations of particulate capture mechanisms for use in the numerical 3-dimensional model; and (3) the design and physical modifications incorporated into the Model 4 GBF hot test setup for the final series of hot gas tests.

  15. OPTIMIZATION OF ADVANCED FILTER SYSTEMS

    SciTech Connect (OSTI)

    R.A. Newby; M.A. Alvin; G.J. Bruck; T.E. Lippert; E.E. Smeltzer; M.E. Stampahar

    2002-06-30T23:59:59.000Z

    Two advanced, hot gas, barrier filter system concepts have been proposed by the Siemens Westinghouse Power Corporation to improve the reliability and availability of barrier filter systems in applications such as PFBC and IGCC power generation. The two hot gas, barrier filter system concepts, the inverted candle filter system and the sheet filter system, were the focus of bench-scale testing, data evaluations, and commercial cost evaluations to assess their feasibility as viable barrier filter systems. The program results show that the inverted candle filter system has high potential to be a highly reliable, commercially successful, hot gas, barrier filter system. Some types of thin-walled, standard candle filter elements can be used directly as inverted candle filter elements, and the development of a new type of filter element is not a requirement of this technology. Six types of inverted candle filter elements were procured and assessed in the program in cold flow and high-temperature test campaigns. The thin-walled McDermott 610 CFCC inverted candle filter elements, and the thin-walled Pall iron aluminide inverted candle filter elements are the best candidates for demonstration of the technology. Although the capital cost of the inverted candle filter system is estimated to range from about 0 to 15% greater than the capital cost of the standard candle filter system, the operating cost and life-cycle cost of the inverted candle filter system is expected to be superior to that of the standard candle filter system. Improved hot gas, barrier filter system availability will result in improved overall power plant economics. The inverted candle filter system is recommended for continued development through larger-scale testing in a coal-fueled test facility, and inverted candle containment equipment has been fabricated and shipped to a gasifier development site for potential future testing. Two types of sheet filter elements were procured and assessed in the program through cold flow and high-temperature testing. The Blasch, mullite-bonded alumina sheet filter element is the only candidate currently approaching qualification for demonstration, although this oxide-based, monolithic sheet filter element may be restricted to operating temperatures of 538 C (1000 F) or less. Many other types of ceramic and intermetallic sheet filter elements could be fabricated. The estimated capital cost of the sheet filter system is comparable to the capital cost of the standard candle filter system, although this cost estimate is very uncertain because the commercial price of sheet filter element manufacturing has not been established. The development of the sheet filter system could result in a higher reliability and availability than the standard candle filter system, but not as high as that of the inverted candle filter system. The sheet filter system has not reached the same level of development as the inverted candle filter system, and it will require more design development, filter element fabrication development, small-scale testing and evaluation before larger-scale testing could be recommended.

  16. Web Content Filtering 1 User Guidelines Web content filter guidelines

    E-Print Network [OSTI]

    Web Content Filtering 1 User Guidelines Web content filter guidelines Introduction The basic criterion for blocking a Web page Categories of material which will be blocked Requesting the unblocking of Aberdeen applies a Web Content Filtering service to all web pages accessed from the undergraduate network

  17. Ceramic HEPA Filter Program

    SciTech Connect (OSTI)

    Mitchell, M A; Bergman, W; Haslam, J; Brown, E P; Sawyer, S; Beaulieu, R; Althouse, P; Meike, A

    2012-04-30T23:59:59.000Z

    Potential benefits of ceramic filters in nuclear facilities: (1) Short term benefit for DOE, NRC, and industry - (a) CalPoly HTTU provides unique testing capability to answer questions for DOE - High temperature testing of materials, components, filter, (b) Several DNFSB correspondences and presentations by DNFSB members have highlighted the need for HEPA filter R and D - DNFSB Recommendation 2009-2 highlighted a nuclear facility response to an evaluation basis earthquake followed by a fire (aka shake-n-bake) and CalPoly has capability for a shake-n-bake test; (2) Intermediate term benefit for DOE and industry - (a) Filtration for specialty applications, e.g., explosive applications at Nevada, (b) Spin-off technologies applicable to other commercial industries; and (3) Long term benefit for DOE, NRC, and industry - (a) Across industry, strong desire for better performance filter, (b) Engineering solution to safety problem will improve facility safety and decrease dependence on associated support systems, (c) Large potential life-cycle cost savings, and (d) Facilitates development and deployment of LLNL process innovations to allow continuous ventilation system operation during a fire.

  18. Ozone decomposing filter

    DOE Patents [OSTI]

    Simandl, Ronald F. (Farragut, TN); Brown, John D. (Harriman, TN); Whinnery, Jr., LeRoy L. (Dublin, CA)

    1999-01-01T23:59:59.000Z

    In an improved ozone decomposing air filter carbon fibers are held together with a carbonized binder in a perforated structure. The structure is made by combining rayon fibers with gelatin, forming the mixture in a mold, freeze-drying, and vacuum baking.

  19. Quick-change filter cartridge

    DOE Patents [OSTI]

    Rodgers, John C. (Santa Fe, NM); McFarland, Andrew R. (College Station, TX); Ortiz, Carlos A. (Bryan, TX)

    1995-01-01T23:59:59.000Z

    A quick-change filter cartridge. In sampling systems for measurement of airborne materials, a filter element is introduced into the sampled airstream such that the aerosol constituents are removed and deposited on the filter. Fragile sampling media often require support in order to prevent rupture during sampling, and careful mounting and sealing to prevent misalignment, tearing, or creasing which would allow the sampled air to bypass the filter. Additionally, handling of filter elements may introduce cross-contamination or exposure of operators to toxic materials. Moreover, it is desirable to enable the preloading of filter media into quick-change cartridges in clean laboratory environments, thereby simplifying and expediting the filter-changing process in the field. The quick-change filter cartridge of the present invention permits the application of a variety of filter media in many types of instruments and may also be used in automated systems. The cartridge includes a base through which a vacuum can be applied to draw air through the filter medium which is located on a porous filter support and held there by means of a cap which forms an airtight seal with the base. The base is also adapted for receiving absorbing media so that both particulates and gas-phase samples may be trapped for investigation, the latter downstream of the aerosol filter.

  20. Elimination of ``memory`` from sample handling and inlet system of a mass spectrometer

    DOE Patents [OSTI]

    Chastgner, P.

    1991-05-08T23:59:59.000Z

    This paper describes a method for preparing the sample handling and inlet system of a mass spectrometer for analysis of a subsequent sample following analysis of a previous sample comprising the flushing of the system interior with supercritical CO{sub 2} and venting the interior. The method eliminates the effect of system ``memory`` on the subsequent analysis, especially following persistent samples such as xenon and krypton.

  1. Reducing Air Compressor Work by Using Inlet Air Cooling and Dehumidification

    E-Print Network [OSTI]

    Hardy, Mark James

    2011-02-22T23:59:59.000Z

    Ambient Relative Humidity 20-100% In this study, three separate cases are considered, and a separate model has been developed for each case. The first case serves as a base case to examine the work input of the compressor system without inlet air.... Also, the compressors were modeled as isentropic, which is not representative of an actual case. Future studies can determine the effects of non-isentropic compression and how behavior of real compressors will deviate from the model presented...

  2. A theoretical and experimental study of a dredge suction inlet, sink flow near a boundary

    E-Print Network [OSTI]

    Apgar, William Jack

    1973-01-01T23:59:59.000Z

    accessibility was needed to view the experiment, take data, and adjust the equipment. Low cost was attained by using an inexpen- sive fluid and surplus parts and material when possible. The appara- tus consisted of a tank containing one thousand gallons...A THEORETICAL AND EXPERIMENTAL STUDY OF A DREDGE SUCTION INLET& SINK FLON NEAR A SOUNDARY A Thesis by Milliam Jack Apgar Submitted to the Graduate College of Texas ASM University in partial fulfillment of the requ-. 'rement for the degree...

  3. Hot-filament chemical vapor deposition chamber and process with multiple gas inlets

    DOE Patents [OSTI]

    Deng, Xunming; Povolny, Henry S.

    2004-06-29T23:59:59.000Z

    A thin film deposition method uses a vacuum confinement cup that employs a dense hot filament and multiple gas inlets. At least one reactant gas is introduced into the confinement cup both near and spaced apart from the heated filament. An electrode inside the confinement cup is used to generate plasma for film deposition. The method is used to deposit advanced thin films (such as silicon based thin films) at a high quality and at a high deposition rate.

  4. Laboratory studies of eddy structures and exchange processes through tidal inlets

    E-Print Network [OSTI]

    Nicolau del Roure, Francisco

    2009-06-02T23:59:59.000Z

    of the inlet. b) Longitudinal position of the center of the main vortex starting from the edge of the barrier island. c) Lateral position of the center of the main vortex starting from the edge of the barrier island. d) Circulation around the main vortex... island. d) Circulation around the main vortex. e) Maximum vorticity in the main vortex. f) Equivalent diameter of the main vortex. g) Upwelling flowing from the main vortex. ...........................................34 Figure 11 Life-history Type I...

  5. Ambient aerosol sampling inlet for flow rates of 100 and 400 l/min

    E-Print Network [OSTI]

    Baehl, Michael Matthew

    2009-05-15T23:59:59.000Z

    tunnel, where three different speeds were employed; namely 2, 8, and 24 km/hr. The aerosol particles used in these tests were generated from ethanol dilutions of a master solution containing 90% ethanol, 9% oleic acid and 1% sodium fluorescein... AMBIENT AEROSOL SAMPLING INLET FOR FLOW RATES OF 100 AND 400 L/MIN A Thesis by MICHAEL MATTHEW BAEHL Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment...

  6. Design of an Alternative Coolant Inlet Flow Configuaration for the Modular Helium Reactor

    SciTech Connect (OSTI)

    SM Mohsin Reza; E. A. Harvego; Matt Richards; Arkal Shenoy; Kenneth Lee Peddicord

    2006-06-01T23:59:59.000Z

    The coolant outlet temperature for the Modular Helium Reactor (MHR) was increased to improve the overall efficiency of nuclear hydrogen production using either thermochemical or high temperature electrolysis (HTE) processes. The inlet temperature was also increased to keep about the same _T across the reactor core. Thermal hydraulic analyses of the current MHR design were performed with these updated temperatures to determine the impact of these highter temperatures on pressure drops, coolant flow rates and temperature profiles within the vessel and core regions. Due to these increased operating temperatures, the overall efficiency of hydrogen production processes increases but the steady state reactor vessel temperature is found to be well above the ASME code limits for current vessel materials. Using the RELAP5-3D/ATHENA computer code, an alternative configuration for the MHR coolant inlet flow path was evaluated in an attempt to reduce the reactor vessel temperatures. The coolant inlet flow was shifted from channel boxes located in the annular region between the reactor core barrel and the inner wall of the reactor vessel to a flow path through the outer permanent reflector. Considering the available thickness of graphite in the permanent outer reflector, the total flow area, the number of coolant holes and the coolant-hole diameter were varied to optimize the pressure drop, the coolant inlet velocity and the percentage of graphite removed from the core. The resulting thermal hydraulic analyses of the optimized design showed that peak vessel and fuel temperatures were within acceptable limits for both steady-state and transient operating conditions.

  7. Electrically-Assisted Diesel Particulate Filter Regeneration...

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

    More Documents & Publications Substrate Studies of an Electrically-Assisted Diesel Particulate Filter Electrically-Assisted Diesel Particulate Filter Regeneration...

  8. CLEERS Activities: Diesel Soot Filter Characterization & NOx...

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

    Activities: Diesel Soot Filter Characterization & NOx Control Fundamentals CLEERS Activities: Diesel Soot Filter Characterization & NOx Control Fundamentals 2009 DOE Hydrogen...

  9. Water displacement mercury pump

    DOE Patents [OSTI]

    Nielsen, Marshall G. (Woodside, CA)

    1985-01-01T23:59:59.000Z

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

  10. Experimental Investigation of the Flow Field in the Vicinity of the Suction Inlet of a Model Cutter Suction Dredge

    E-Print Network [OSTI]

    Dismuke, Colin Patrick

    2012-07-16T23:59:59.000Z

    The purpose of this thesis is to describe the three-dimensional velocity flow field measurements in the vicinity of the inlet mouth of a cutterhead suction dredge. Using acoustic Doppler velocimeters (ADVs), an accurate visualization of the velocity...

  11. Habitat use and occurrence of the bull shark (Carcharhinus leucas) near the Sabine Pass inlet of Texas and Louisiana

    E-Print Network [OSTI]

    Shipley, Jennifer Brooke

    2000-01-01T23:59:59.000Z

    The role of nearshore Gulf of Mexico habitats adjacent to Sabine Pass, a tidal inlet forming the southernmost border between Texas and Louisiana, in bull shark (Carcharhinus leucas) life history as well as the impact of selected environmental...

  12. Regenerable particulate filter

    DOE Patents [OSTI]

    Stuecker, John N. (Albuquerque, NM); Cesarano, III, Joseph (Albuquerque, NM); Miller, James E. (Albuquerque, NM)

    2009-05-05T23:59:59.000Z

    A method of making a three-dimensional lattice structure, such as a filter used to remove particulates from a gas stream, where the physical lattice structure is designed utilizing software simulation from pre-defined mass transfer and flow characteristics and the designed lattice structure is fabricated using a free-form fabrication manufacturing technique, where the periodic lattice structure is comprised of individual geometric elements.

  13. In-service filter testing

    SciTech Connect (OSTI)

    Terada, K.; Woodard, R.W.; Jensen, R.T.

    1985-04-29T23:59:59.000Z

    This report contains the observations, test results, and conclusions of three separate in-service tests beginning in November 1979 and concluding in September 1983. The in-service tests described in this report produced encouraging results on filters constructed with fiberglass medium containing 5% Nomex and separators of aluminum foil coated with a thin film of vinyl-epoxy polymer. Filters containing medium with Kevlar fiber additives demonstrated they merited further evaluation. Other types of filters tested include separatorless filters (Flanders SuperFlow) and one filter with fiberglass separators. Asbestos-containing filters were used for comparison until their supply was exhausted. All filters tested were judged to have performed satisfactorily under the test conditions.

  14. A Critical Analysis of Technological Innovation and Economic Development in Southern California's Urban Water Reuse And Recycling Industry

    E-Print Network [OSTI]

    Pilip-Florea, Shadrach Jay

    2012-01-01T23:59:59.000Z

    Richardson, Mark 2009. Siemens Water Technologies Company2011. www. 3news.co.nz Siemens Water Technologies, 2012.conglomerations, US Filter, now Siemens Water Technologies

  15. TESTING OF THE SECOND GENERATION SPINTEK ROTARY FILTER -11357

    SciTech Connect (OSTI)

    Herman, D.; Poirier, M.; Fowley, M.; Keefer, M.; Huff, T.

    2011-02-02T23:59:59.000Z

    The SpinTek rotary microfilter has been developed under the Department of Energy (DOE) Office of Environmental Management (EM) for the purpose of deployment in radioactive service in the DOE complex. The unit that was fabricated and tested is the second generation of the filter that incorporates recommended improvements from previous testing. The completion of this test satisfied a key milestone for the EM technology development program and technology readiness for deployment by Savannah River Remediation in the Small Column Ion Exchange and Sludge Washing processes at the Savannah River Site (SRS). The Savannah River National Laboratory (SRNL) contracted SpinTek Filtration to fabricate a full scale 25 disk rotary filter and perform a 1000 hour endurance test with a simulated SRS sludge. Over 1500 hours of operation have been completed with the filter. SpinTek Filtration fabricated a prototypic 25 disk rotary filter including updates to manufacturing tolerances, an updated design to the rotary joint, improved cooling to the bottom journal, decreases in disk and filter shaft hydraulic resistances. The filter disks were fabricated with 0.5 {micro} pore size, sintered-metal filter media manufactured by Pall Corporation (M050). After fabrication was complete, the filter passed acceptance tests demonstrating rejection of solids and clean water flux with a 50% improvement over the previous filters. Once the acceptance test was complete, a 1000 hour endurance test was initiated simulating a sludge washing process. The test used a simulated SRS Sludge Batch 6 recipe. The insoluble solids started at 5 wt% and were raised to 10 and 15 wt% insoluble solids to simulate the concentration of a large volume tank. The filter system was automated and set up for 24 hour unattended operation. To facilitate this, process control logic was written to operate the filter. During the development it was demonstrated that the method of starting and stopping the filter can affect the build up of filter cake on the disks and therefore the performance of the filter. The filter performed well with the simulant. Very little drop in production was noticed between the 5 and 10 wt% insoluble solids feed. Increasing to 15 wt% had a more pronounced impact due to the rheology of the feed. Acid cleaning was used to clean the filter disks in-situ and restore filtration rate to almost 90% of the initial clean disk rate. Eighty liters of 0.2 M nitric acid in conjunction with water rinses were used to clean the filter in less than 2 hours. Filter testing was completed after 1000 hours of operation were performed on the final filter assembly configuration. The total run time for the testing was over 1500 hours. At the end of the test, the sludge washing was performed successfully from approximately 5.6 M to less than 1 M sodium.

  16. Granular-bed-filter development program, Phase II. Final report

    SciTech Connect (OSTI)

    Guillory, J.; Cooper, J.; Ferguson, J.; Goldbach, G.; Placer, F.

    1983-05-01T23:59:59.000Z

    The high-temperature moving bed granular filter (GBF) program at Combustion Power Company (CPC) commenced in 1977. Its purpose was to investigate, for the Department of Energy, the filtration performance of the GBF for application to coal-fired PFBC turbine systems. The GBF test system was successfully operated on 1500/sup 0/F to 1600/sup 0/F gases produced from an atmospheric pressure coal-fired fluidized bed combustor. Overall collection efficiencies above 99% and submicron collection efficiencies above 96% were consistently demonstrated in over 1500 hours of high-temperature testing. Alkali content of the hot gases was also measured to evaluate aluminosilicate additives for controlling alkali emissions. Operational and performance stability under upset conditions (ten times normal inlet loading and 125% of design gas flowrate) was also demonstrated experimentally. A computer-based GBF performance model was developed. It predicts overall particle capture within +- 5%. Gas flow streamlines and isobars are computer generated from theoretical principles and particle capture is based on the most recent empirical models. The effects of elevated pressure on efficiency and filter pressure drop are included in the model. A modular approach was adopted for GBF scale-up to commercial size systems using elements of the same size tested in this program. Elements can be readily packaged into 30,000 acfm modules at a projected equipment cost of approximately $27 per acfm.

  17. Comparative survey on non linear filtering methods : the quantization and the particle filtering approaches

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    , importance sam- pling, Kalman filter, stochastic volatility, infinite dimension filter. 1 Introduction We models: the Kalman filter case, the canonical stochastic volatility model and the infinite dimension

  18. Secondary Pollutants from Ozone Reaction with Ventilation Filters and Degradation of Filter Media Additives

    E-Print Network [OSTI]

    Destaillats, Hugo

    2012-01-01T23:59:59.000Z

    and degradation of filter media additives H. Destaillats, W.and Degradation of Filter Media Additives Hugo Destaillatsand degradation of filter media additives Hugo Destaillats

  19. Method for enhanced longevity of in situ microbial filter used for bioremediation

    DOE Patents [OSTI]

    Carman, M.L.; Taylor, R.T.

    1999-03-30T23:59:59.000Z

    An improved method is disclosed for in situ microbial filter bioremediation having increasingly operational longevity of an in situ microbial filter emplaced into an aquifer. A method is presented for generating a microbial filter of sufficient catalytic density and thickness, which has increased replenishment interval, improved bacteria attachment and detachment characteristics and the endogenous stability under in situ conditions. A system is also disclosed for in situ field water remediation. 31 figs.

  20. Coated x-ray filters

    DOE Patents [OSTI]

    Steinmeyer, P.A.

    1992-11-24T23:59:59.000Z

    A radiation filter for filtering radiation beams of wavelengths within a preselected range of wavelengths comprises a radiation transmissive substrate and an attenuating layer deposited on the substrate. The attenuating layer may be deposited by a sputtering process or a vacuum process. Beryllium may be used as the radiation transmissive substrate. In addition, a second radiation filter comprises an attenuating layer interposed between a pair of radiation transmissive layers. 4 figs.

  1. Coated x-ray filters

    DOE Patents [OSTI]

    Steinmeyer, Peter A. (Farmington, NM)

    1992-11-24T23:59:59.000Z

    A radiation filter for filtering radiation beams of wavelengths within a preselected range of wavelengths comprises a radiation transmissive substrate and an attenuating layer deposited on the substrate. The attenuating layer may be deposited by a sputtering process or a vacuum process. Beryllium may be used as the radiation transmissive substrate. In addition, a second radiation filter comprises an attenuating layer interposed between a pair of radiation transmissive layers.

  2. Effects of inlet geometries on flow recirculation in an axial-flow pump

    E-Print Network [OSTI]

    Alpan, Kenan

    1984-01-01T23:59:59.000Z

    and mixing occurred. The problem was remedied for good by mounting two single lip seals back to back. Because of its availability, an automotive air conditioning con- denser was used as the heat exchanger for the cooling/lubricating system. The pressure... APPARATUS. 3. 1 Introduction. . . . ~ 3 ' 2 Test Pump 3. 3 Power Supply. 3. 4 Hydraulic Loop 3. 5 Lubricating and Cooling System. 3. 6 Inlet Geometries. ~ ~ ~ ~ ~ ~ ~ 3. 7 Instrumentation 'I P 14 14 14 19 23 23 30 33 CHAPTER IV. EXPERIMENTAL...

  3. Assessment of the KE Basin Sand Filter Inventory In Support of Hazard Categorization

    SciTech Connect (OSTI)

    Ross, Steven B.; Young, Jonathan

    2005-09-28T23:59:59.000Z

    In 1978, the water cleaning system for the KE Basin was upgraded by adding a sand filter and ion exchange columns. Basin water containing finely divided solids is collected by three surface skimmers and pumped to the sand filter. Filtrate from the sand filter is further treated in the ion exchange modules. The suspended solids accumulate in the sand until the pressure drop across the filter reaches established operating limits, at which time the sand filter is backwashed. The backwash is collected in the NLOP, where the solids are allowed to settle as sludge. Figure 2-1 shows a basic piping and instrumentation diagram depicting the relationship among the basin skimmers, sand filter, and NLOP. During the course of deactivation and decommissioning (D&D) of the K-Basins, the sand filter and its media will need to be dispositioned. The isotopic distribution of the sludge in the sand filter has been estimated in KE Basin Sand Filter Monolith DQO (KBC-24705). This document estimates the sand filter contribution to the KE hazard categorization using the data from the DQO.

  4. Realistic Hot Water Draw Specification for Rating Solar Water Heaters: Preprint

    SciTech Connect (OSTI)

    Burch, J.

    2012-06-01T23:59:59.000Z

    In the United States, annual performance ratings for solar water heaters are simulated, using TMY weather and specified water draw. A more-realistic ratings draw is proposed that eliminates most bias by improving mains inlet temperature and by specifying realistic hot water use. This paper outlines the current and the proposed draws and estimates typical ratings changes from draw specification changes for typical systems in four cities.

  5. filter + electrical Zeroforcing Electrical Filters for Direct Detection Optical Systems

    E-Print Network [OSTI]

    Humblet, Pierre A.

    signal envelope. The thermal noise n(t) from the electronics is assumed to be the dominant noise) = Re{p(t-iT )p # (t-jT )}, p(t) is the complex envelope of the received optical pulse taking­Perot interferometer We consider a Fabry­Perot filter as the optical demulti­ plexing filter [1]. The envelope

  6. Removal of ammonia from contaminated air in a biotrickling filter Denitrifying bioreactor combination system

    E-Print Network [OSTI]

    Removal of ammonia from contaminated air in a biotrickling filter ­ Denitrifying bioreactor of a biotrickling filter, a deni- trification reactor and a polishing bioreactor for the trickling liquid by accumulating nitrate and nitrite and avoiding generation of contaminated water. All bioreactors were packed

  7. Interacting Multiple Model Kalman Filters (IMMKF) Interacting Multiple Model Kalman Filters

    E-Print Network [OSTI]

    Williams, Brian C.

    Interacting Multiple Model Kalman Filters (IMMKF) Interacting Multiple Model Kalman Filters (IMMKF R.Q.A. Santana Interacting Multiple Model Kalman Filters (IMMKF) #12;Interacting Multiple Model Kalman Filters (IMMKF) Sumário 1 Introdução Abordagens de múltiplos modelos Introdução ao Interacting

  8. Durability of Diesel Particulate Filters - Bench Studies on Cordierite...

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

    Particulate Filters - Bench Studies on Cordierite Filters Durability of Diesel Particulate Filters - Bench Studies on Cordierite Filters Presentation given at DEER 2006, August...

  9. Drinking Water Problems: MTBE

    E-Print Network [OSTI]

    Dozier, Monty; Lesikar, Bruce J.

    2008-08-28T23:59:59.000Z

    Methyl tertiary-butyl ether, a gasoline additive commonly known as MTBE, can contaminate ground water and cause health problems for those exposed to it for a long time. However, filtering devices can remove this and other additives from well water...

  10. STATISTICAL FILTERING* John B. Moore~

    E-Print Network [OSTI]

    Moore, John Barratt

    noise signals. Theoretical developments in statistical filtering have been made side by side linkages will be made between these two major in filtering. in the developments In the classical approaches and the unwanted signals (noise) lie in another with possibly some overlap. In the statistical approach, the best

  11. A performance study of ceramic candle filters in Kenya including tests for coliphage removal

    E-Print Network [OSTI]

    Franz, Amber, 1982-

    2005-01-01T23:59:59.000Z

    Approximately 80% of all diseases in the developing world are caused by contaminated water (GDRC, 1999). In response to this crisis, decentralized point-of-use systems, such as ceramic candle filters, have emerged as viable ...

  12. Analysis and sourcing of the mechanical equipment required for a ceramic pot filter production facility

    E-Print Network [OSTI]

    Getachew, Julian (Julian B.)

    2011-01-01T23:59:59.000Z

    Research was done into identifying and sourcing the mechanical equipment required for manufacturing ceramic pot filters, specifically for use in the Pure Home Water factory in Northern Ghana. The pieces of equipment ...

  13. Drinking Water Problems: Iron and Manganese

    E-Print Network [OSTI]

    Dozier, Monty; McFarland, Mark L.

    2004-02-20T23:59:59.000Z

    . The chemical must be in the water for at least 20 minutes for oxi- dation to take place, longer if the water contains colloidal iron/manganese. After solid particles have formed they are filtered, often with a sand filter. Adding aluminum sulfate (alum...

  14. On the Kalman Filter and Its Variations

    E-Print Network [OSTI]

    Lindsey, Theodore S.

    2014-05-31T23:59:59.000Z

    . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 0.6 Kalman Filter via Newton’s method . . . . . . . . . . . . . . . . . . . . . . . 7 0.7 Implementation and Comparison of Two Kalman Filter Extensions . . . . . 10 0.8 Future Investigations: Several Kalman Filter Modifications . . . . . . . . . 15... . . . . . . . . . . . . . . . . . . . . 22 0.12 Unscented Kalman Filter Implementation . . . . . . . . . . . . . . . . . . . . 24 v 0.1 Introduction - Filtering The essence of a filter is to determine the states of a system (say, xk) which are not directly observed by forming estimates...

  15. Filtered-vented containment systems. [PWR; BWR

    SciTech Connect (OSTI)

    Benjamin, A.S.; Walling, H.C.; Cybulskis, P.; DiSalvo, R.

    1980-01-01T23:59:59.000Z

    The potential benefits of filtered-vented containment systems as a means for mitigating the effects of severe accidents are analyzed. Studies so far have focused upon two operating reactor plants in the United States, a large-containment pressurized water reactor and a Mark I containment boiling water reactor. Design options that could be retrofitted to these plants are described including single-component once-through venting systems, multiple-component systems with vent and recirculation capabilities, and totally contained venting systems. A variety of venting strategies are also described which include simple low-volume containment pressure relief strategies and more complicated, high-volume venting strategies that require anticipatory actions. The latter type of strategy is intended for accidents that produce containment-threatening pressure spikes.

  16. Performance of ceramic membrane filters

    SciTech Connect (OSTI)

    Ahluwalia, R.K.; Im, K.H.; Geyer, H.K. [Argonne National Lab., IL (United States); Shelleman, D.L.; Tressler, R.E. [Pennsylvania State Univ., University Park, PA (United States)

    1996-08-01T23:59:59.000Z

    CeraMem Corp.`s ceramic-membrane coated, dead-end ceramic filters offer a promising alternative to ceramic candle filters providing long-term operational and reliability issues are resolved: regenerability of filter passages by back pulse cleaning, tolerance to alkali-containing combustion gas and thermal/chemical aging. ANL is responsible for analytical modeling of filtration and pulse cleaning operations, flow-through testing, and prediction of filter response to thermal cycling under realistic service conditions. A test apparatus was built to expose ceramic filter specimens to chemical environments simulating operation of pressurized fluidized bed and integrated gasification combined cycle plants. Four long-duration tests have been conducted in which 100-cpsi channel filters were exposed to ash collected downstream of the cyclone separator at the PFBC plant at Tidd. Results are discussed. Focus has now shifted to exposing the advanced candle filter specimens to reducing gas environments containing NaCl, H{sub 2}S, H{sub 2}O, and gasification ash.

  17. A study of inlet designs for an experimental sewage sedimentation tank

    E-Print Network [OSTI]

    Harlin, Curtis Chester, Jr

    1952-01-01T23:59:59.000Z

    '0 91'0 Cl HO33S +(o zt. o oi o eo o ~a. o eo o zoo oo'o 83d J. 339 BIGAMY ? /HO 10 veivo iii thc inl' t c'i of the feed '&ipe loc . ti&d in thc . rit ch m:bcr. Thc opciiiii;; - id clos': ? of t'. c 'auttcrfly valve coiitrolled by large flo t i i... V C I tC Cl L 3 Ol 4. ~ C ~ I I C 3 Cl C ?P Cl 32 w*vee svereee el" F i'gure 8g. ? Inlet Type Vl I. 33 to determine tho stability of tne desi . is, as would be in- dicated by an ability to repeat the same results consistent...

  18. Study of the Acoustic Effects of Hydrokinetic Tidal Turbines in Admiralty Inlet, Puget Sound

    SciTech Connect (OSTI)

    Brian Polagye; Jim Thomson; Chris Bassett; Jason Wood; Dom Tollit; Robert Cavagnaro; Andrea Copping

    2012-03-30T23:59:59.000Z

    Hydrokinetic turbines will be a source of noise in the marine environment - both during operation and during installation/removal. High intensity sound can cause injury or behavioral changes in marine mammals and may also affect fish and invertebrates. These noise effects are, however, highly dependent on the individual marine animals; the intensity, frequency, and duration of the sound; and context in which the sound is received. In other words, production of sound is a necessary, but not sufficient, condition for an environmental impact. At a workshop on the environmental effects of tidal energy development, experts identified sound produced by turbines as an area of potentially significant impact, but also high uncertainty. The overall objectives of this project are to improve our understanding of the potential acoustic effects of tidal turbines by: (1) Characterizing sources of existing underwater noise; (2) Assessing the effectiveness of monitoring technologies to characterize underwater noise and marine mammal responsiveness to noise; (3) Evaluating the sound profile of an operating tidal turbine; and (4) Studying the effect of turbine sound on surrogate species in a laboratory environment. This study focuses on a specific case study for tidal energy development in Admiralty Inlet, Puget Sound, Washington (USA), but the methodologies and results are applicable to other turbine technologies and geographic locations. The project succeeded in achieving the above objectives and, in doing so, substantially contributed to the body of knowledge around the acoustic effects of tidal energy development in several ways: (1) Through collection of data from Admiralty Inlet, established the sources of sound generated by strong currents (mobilizations of sediment and gravel) and determined that low-frequency sound recorded during periods of strong currents is non-propagating pseudo-sound. This helped to advance the debate within the marine and hydrokinetics acoustic community as to whether strong currents produce propagating sound. (2) Analyzed data collected from a tidal turbine operating at the European Marine Energy Center to develop a profile of turbine sound and developed a framework to evaluate the acoustic effects of deploying similar devices in other locations. This framework has been applied to Public Utility District No. 1 of Snohomish Country's demonstration project in Admiralty Inlet to inform postinstallation acoustic and marine mammal monitoring plans. (3) Demonstrated passive acoustic techniques to characterize the ambient noise environment at tidal energy sites (fixed, long-term observations recommended) and characterize the sound from anthropogenic sources (drifting, short-term observations recommended). (4) Demonstrated the utility and limitations of instrumentation, including bottom mounted instrumentation packages, infrared cameras, and vessel monitoring systems. In doing so, also demonstrated how this type of comprehensive information is needed to interpret observations from each instrument (e.g., hydrophone data can be combined with vessel tracking data to evaluate the contribution of vessel sound to ambient noise). (5) Conducted a study that suggests harbor porpoise in Admiralty Inlet may be habituated to high levels of ambient noise due to omnipresent vessel traffic. The inability to detect behavioral changes associated with a high intensity source of opportunity (passenger ferry) has informed the approach for post-installation marine mammal monitoring. (6) Conducted laboratory exposure experiments of juvenile Chinook salmon and showed that exposure to a worse than worst case acoustic dose of turbine sound does not result in changes to hearing thresholds or biologically significant tissue damage. Collectively, this means that Chinook salmon may be at a relatively low risk of injury from sound produced by tidal turbines located in or near their migration path. In achieving these accomplishments, the project has significantly advanced the District's goals of developing a demonstration-scale tidal energy proj

  19. ADVANCED HOT GAS FILTER DEVELOPMENT

    SciTech Connect (OSTI)

    E.S. Connolly; G.D. Forsythe

    2000-09-30T23:59:59.000Z

    DuPont Lanxide Composites, Inc. undertook a sixty-month program, under DOE Contract DEAC21-94MC31214, in order to develop hot gas candle filters from a patented material technology know as PRD-66. The goal of this program was to extend the development of this material as a filter element and fully assess the capability of this technology to meet the needs of Pressurized Fluidized Bed Combustion (PFBC) and Integrated Gasification Combined Cycle (IGCC) power generation systems at commercial scale. The principal objective of Task 3 was to build on the initial PRD-66 filter development, optimize its structure, and evaluate basic material properties relevant to the hot gas filter application. Initially, this consisted of an evaluation of an advanced filament-wound core structure that had been designed to produce an effective bulk filter underneath the barrier filter formed by the outer membrane. The basic material properties to be evaluated (as established by the DOE/METC materials working group) would include mechanical, thermal, and fracture toughness parameters for both new and used material, for the purpose of building a material database consistent with what is being done for the alternative candle filter systems. Task 3 was later expanded to include analysis of PRD-66 candle filters, which had been exposed to actual PFBC conditions, development of an improved membrane, and installation of equipment necessary for the processing of a modified composition. Task 4 would address essential technical issues involving the scale-up of PRD-66 candle filter manufacturing from prototype production to commercial scale manufacturing. The focus would be on capacity (as it affects the ability to deliver commercial order quantities), process specification (as it affects yields, quality, and costs), and manufacturing systems (e.g. QA/QC, materials handling, parts flow, and cost data acquisition). Any filters fabricated during this task would be used for product qualification tests being conducted by Westinghouse at Foster-Wheeler's Pressurized Circulating Fluidized Bed (PCFBC) test facility in Karhula, Finland. Task 5 was designed to demonstrate the improvements implemented in Task 4 by fabricating fifty 1.5-meter hot gas filters. These filters were to be made available for DOE-sponsored field trials at the Power Systems Development Facility (PSDF), operated by Southern Company Services in Wilsonville, Alabama.

  20. Tunable Imaging Filters in Astronomy

    E-Print Network [OSTI]

    J. Bland-Hawthorn

    2000-06-05T23:59:59.000Z

    While tunable filters are a recent development in night time astronomy, they have long been used in other physical sciences, e.g. solar physics, remote sensing and underwater communications. With their ability to tune precisely to a given wavelength using a bandpass optimized for the experiment, tunable filters are already producing some of the deepest narrowband images to date of astrophysical sources. Furthermore, some classes of tunable filters can be used in fast telescope beams and therefore allow for narrowband imaging over angular fields of more than a degree over the sky.

  1. Kalman filtering for matrix estimation

    E-Print Network [OSTI]

    Choukroun, Daniel; Weiss, Haim; Bar-Itzhack, Itzhack Y; Oshman, Yaakov

    2006-01-01T23:59:59.000Z

    of the AIAA. CHOUKROUN ET AL. : KALMAN FILTERING FOR MATRIXof an AD problem. REFERENCES Kalman, R. E. A new approach toD, 82 (Mar. 1960), 35—45. Kalman, R. E. , and Bucy, R. S.

  2. Development of Advanced Particulate Filters

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

    Time (sec) 400 degC 500 degC Filter -pore structures were imaged by conventional optics 19 Reconstructed 3-D images revealed the details of -pores at any section of...

  3. particle flow for nonlinear filters

    E-Print Network [OSTI]

    Dobigeon, Nicolas

    particle flow for nonlinear filters Fred Daum 19 June 2012 Copyright © 2012 Raytheon Company. All rights reserved. Customer Success Is Our Mission is a trademark of Raytheon Company. 1 #12;discrete time

  4. Spin Filtering in Storage Rings

    E-Print Network [OSTI]

    N. N. Nikolaev; F. F. Pavlov

    2005-12-05T23:59:59.000Z

    The spin filtering in storage rings is based on the multiple passage of a stored beam through a polarized internal gas target. Apart from the polarization by transmission, a unique geometrical feature of interaction with the target in such a filtering process, pointed out by H.O. Meyer \\cite{Meyer}, is a scattering of stored particles within the beam. A rotation of the spin in the scattering process affects the polarization buildup. We derive here a quantum-mechanical evolution equation for the spin-density matrix of the stored beam which incorporates scattering within the beam. We show how the interplay of transmission and scattering with the beam changes from polarized electrons to polarized protons in the atomic target. After discussions of the FILTEX results on the filtering of stored protons \\cite{FILTEX}, we comment on the strategy of spin filtering of antiprotons for the PAX experiment at GSI FAIR \\cite{PAX-TP}.

  5. Engineering water for the world: Texas A&M University tackles a water crisis 

    E-Print Network [OSTI]

    Churchill, Caitlin

    2009-01-01T23:59:59.000Z

    Department of Civil Engineering to produce and distribute ceramic point-of-use water filters. These ?pots? are forms of low-cost water treatment that can be used anywhere in the world to prevent needless deaths and poor health. The water filters... and Visual Culture at Texas A&M, in a grant writing workshop. Carpenter was writing a proposal to fabricate ceramic point-of-use water filters and distribute them for use in the colonias. Carpenter had already begun the water project with his co...

  6. Engineering water for the world: Texas A&M University tackles a water crisis

    E-Print Network [OSTI]

    Churchill, Caitlin

    2009-01-01T23:59:59.000Z

    Department of Civil Engineering to produce and distribute ceramic point-of-use water filters. These ?pots? are forms of low-cost water treatment that can be used anywhere in the world to prevent needless deaths and poor health. The water filters... and Visual Culture at Texas A&M, in a grant writing workshop. Carpenter was writing a proposal to fabricate ceramic point-of-use water filters and distribute them for use in the colonias. Carpenter had already begun the water project with his co...

  7. Westinghouse advanced particle filter system

    SciTech Connect (OSTI)

    Lippert, T.E.; Bruck, G.J.; Sanjana, Z.N.; Newby, R.A.

    1995-11-01T23:59:59.000Z

    Integrated Gasification Combined Cycles (IGCC), Pressurized Fluidized Bed Combustion (PFBC) and Advanced PFBC (APFB) are being developed and demonstrated for commercial power generation application. Hot gas particulate filters are key components for the successful implementation of IGCC, PFBC and APFB in power generation gas turbine cycles. The objective of this work is to develop and qualify through analysis and testing a practical hot gas ceramic barrier filter system that meets the performance and operational requirements of these advanced, solid fuel power generation cycles.

  8. To appear: Shore & Beach, Vol 72, No. 1, 2004. Barrier Island Migration and Morphologic Evolution, Fire Island Inlet, New

    E-Print Network [OSTI]

    US Army Corps of Engineers

    72, No. 1, 2004. Currently, dredging costs for Fire Island Inlet are $5 million per year for this purpose. The available data to perform this analysis consisted of aerial photography covering the period from 1936 to present, historical shoreline data from the U. S. Coast & Geodetic Survey land surveys

  9. Hydraulic simulation of the flow condition at the inlet of the beam entrance window of the EURISOL converter target

    E-Print Network [OSTI]

    V. Geza and R. Milenkovic

    The main objective of the computational study presented here, is to calculate the velocity distribution at the inlet of the beam entrace window and to provide computational data, which are to be compared with the experimental data. The experimental data are to be acquired during forthcoming hydraulic test of the Eurisol target mock-up.

  10. Large-Eddy Simulation of a Supersonic Inlet-Isolator Heeseok Koo

    E-Print Network [OSTI]

    Raman, Venkat

    in a dual-mode scramjet engine that provides stable compressed flow to the combustor. However function in weighted essentially nonoscillatory scheme cp = heat capacity at constant pressure e = nonchemical, sensible energy, m2 =s2 et = nonchemical total energy, m2 =s2 F = flux G = filtering kernel h

  11. Interval Arithmetic Kalman Filtering Steven Reece

    E-Print Network [OSTI]

    Roberts, Stephen

    Interval Arithmetic Kalman Filtering Steven Reece Abstract The problem of robust estimation. The Kalman filter, which is probably the most popular model­based data fusion method, is extended filter (BDF), is proposed which combines interval arithmetic with statistical Kalman filter estimation

  12. Spatial filters for high power lasers

    DOE Patents [OSTI]

    Erlandson, Alvin Charles; Bayramian, Andrew James

    2014-12-02T23:59:59.000Z

    A spatial filter includes a first filter element and a second filter element overlapping with the first filter element. The first filter element includes a first pair of cylindrical lenses separated by a first distance. Each of the first pair of cylindrical lenses has a first focal length. The first filter element also includes a first longitudinal slit filter positioned between the first pair of cylindrical lenses. The second filter element includes a second pair of cylindrical lenses separated by a second distance. Each of the second pair of cylindrical lenses has a second focal length. The second filter element also includes a second longitudinal slit filter positioned between the second pair of cylindrical lenses.

  13. Kalman Filter and Extended Kalman Filter Namrata Vaswani, namrata@iastate.edu

    E-Print Network [OSTI]

    Vaswani, Namrata

    Kalman Filter and Extended Kalman Filter Namrata Vaswani, namrata@iastate.edu Kalman and Extended Kalman Filtering 1 #12;Kalman Filter Introduction · Recursive LS (RLS) was for static data: estimate of an object from a video sequence · RLS with forgetting factor assumes slowly time varying x · Kalman filter

  14. Active dc filter for HVDC systems

    SciTech Connect (OSTI)

    Zhang, W. (Royal Inst. of Tech., Stockholm (Sweden)); Asplund, G.

    1994-01-01T23:59:59.000Z

    This article is a case history of the installation of active dc filters for high-performance, low-cost harmonics filtering at the Lindome converter station in the Konti-Skan 2 HVDC transmission link between Denmark and Sweden. The topics of the article include harmonics, interference, and filters, Lindome active dc filter, active dc filter design, digital signal processor, control scheme, protection and fault monitoring, and future applications.

  15. Granular Bed Filter Development Program, Phase II. Monthly technical progress report for April 1-30, 1980

    SciTech Connect (OSTI)

    Moresco, L.L.; Cooper, J.; Ferguson, J.

    1980-01-01T23:59:59.000Z

    The Department of Energy is sponsoring a multiphase program to investigate the filtration potential of the moving bed granular filter (GBF) for application in pressurized high temperature energy conversion systems. Phase I included the development of a mathematical model, a cold flow parametric test series in a 0.746 Nm/sup 3//s GBF, and investigations of potential dust plugging problems at the inlet screen. During the experimental program, collection efficiencies of 99% and filter outlet loadings less that 0.0074 g/m/sup 3/ were demonstrated. The objectives of Phase II are to investigate the effects of elevated temperature and coal combustion particulate on GBF filtration performance, to update the analytical model developed in Phase I to reflect high-temperature effects, to optimize filter internal configuration, to demonstrate long duration GBF performance relative to corrosion, deposition, erosion, filtration efficiency, reliability, controllability, and to design and construct a 0.879 Nm/sup 3//s, 660 kPa filter for delivery to DOE. Hot flow testing to date has confirmed that the GBF configured with inlet and outlet screens has exhibited a tendency for extensive and irreversible ash plugging. As an alternative, the potential advantages produced by a screenless configuration, having higher filtration efficiency, has been achieved during both cold flow and hot flow tests as previously reported. Feed and solid compositions from test P704, the 400-hour GBF test, are presented. A status report on the design of the high pressure GBF along with operation details for purging the GBF of corrosive gases upon shutdown and granular reserve sensing during its operation are detailed.

  16. Water protection in coke-plant design

    SciTech Connect (OSTI)

    G.I. Alekseev [Giprokoks, the State Institute for the Design of Coke-Industry Enterprises, Kharkov (Ukraine)

    2009-07-15T23:59:59.000Z

    Wastewater generation, water consumption, and water management at coke plants are considered. Measures to create runoff-free water-supply and sewer systems are discussed. Filters for water purification, corrosion inhibitors, and biocides are described. An integrated single-phase technology for the removal of phenols, thiocyanides, and ammoniacal nitrogen is outlined.

  17. Hot gas cross flow filtering module

    DOE Patents [OSTI]

    Lippert, Thomas E. (Murrysville Boro, PA); Ciliberti, David F. (Murrysville Boro, PA)

    1988-01-01T23:59:59.000Z

    A filter module for use in filtering particulates from a high temperature gas has a central gas duct and at least one horizontally extending support mount affixed to the duct. The support mount supports a filter element thereon and has a chamber therein, which communicates with an inner space of the duct through an opening in the wall of the duct, and which communicates with the clean gas face of the filter element. The filter element is secured to the support mount over an opening in the top wall of the support mount, with releasable securement provided to enable replacement of the filter element when desired. Ceramic springs may be used in connection with the filter module either to secure a filter element to a support mount or to prevent delamination of the filter element during blowback.

  18. Radiant zone heated particulate filter

    DOE Patents [OSTI]

    Gonze, Eugene V [Pinckney, MI

    2011-12-27T23:59:59.000Z

    A system includes a particulate matter (PM) filter including an upstream end for receiving exhaust gas and a downstream end. A radiant zoned heater includes N zones, where N is an integer greater than one, wherein each of the N zones includes M sub-zones, where M is an integer greater than or equal to one. A control module selectively activates at least a selected one of the N zones to initiate regeneration in downstream portions of the PM filter from the one of the N zones, restricts exhaust gas flow in a portion of the PM filter that corresponds to the selected one of the N zones, and deactivates non-selected ones of the N zones.

  19. Electric filter with movable belt electrode

    DOE Patents [OSTI]

    Bergman, W.

    1983-09-20T23:59:59.000Z

    A method and apparatus for removing airborne contaminants entrained in a gas or airstream includes an electric filter characterized by a movable endless belt electrode, a grounded electrode, and a filter medium sandwiched there between. Inclusion of the movable, endless belt electrode provides the driving force for advancing the filter medium through the filter, and reduces frictional drag on the filter medium, thereby permitting a wide choice of filter medium materials. Additionally, the belt electrode includes a plurality of pleats in order to provide maximum surface area on which to collect airborne contaminants. 4 figs.

  20. Impact of deep-water renewal events on fixed nitrogen loss from seasonally-anoxic Saanich Inlet

    E-Print Network [OSTI]

    Hamme, Roberta C.

    of Victoria, Victoria, BC V8W 3P6, Canada Abstract We interpreted profiles of N2/Ar ratios, 15 N-N2, and O2 submitted to Marine Chemistry August 6, 2010 #12;In these months, the average isotopic composition

  1. Improving Filtering for Computer Graphics

    E-Print Network [OSTI]

    Manson, Josiah

    2014-04-30T23:59:59.000Z

    When drawing images onto a computer screen, the information in the scene is typically more detailed than can be displayed. Most objects, however, will not be close to the camera, so details have to be filtered out, or anti-aliased, when the objects...

  2. ADVANCED HOT GAS FILTER DEVELOPMENT

    SciTech Connect (OSTI)

    RICHARD A. WAGNER

    1998-09-04T23:59:59.000Z

    This report describes the fabrication and testing of continuous fiber ceramic composite (CFCC) based hot gas filters. The fabrication approach utilized a modified filament winding method that combined both continuous and chopped fibers into a novel microstructure. The work was divided into five primary tasks. In the first task, a preliminary set of compositions was fabricated in the form of open end tubes and characterized. The results of this task were used to identify the most promising compositions for sub-scale filter element fabrication and testing. In addition to laboratory measurements of permeability and strength, exposure testing in a coal combustion environment was performed to asses the thermo-chemical stability of the CFCC materials. Four candidate compositions were fabricated into sub-scale filter elements with integral flange and a closed end. Following the 250 hour exposure test in a circulating fluid bed combustor, the retained strength ranged from 70 t 145 percent of the as-fabricated strength. The post-test samples exhibited non-catastrophic failure behavior in contrast to the brittle failure exhibited by monolithic materials. Filter fabrication development continued in a filter improvement and cost reduction task that resulted in an improved fiber architecture, the production of a net shape flange, and an improved low cost bond. These modifications were incorporated into the process and used to fabricate 50 full-sized filter elements for testing in demonstration facilities in Karhula, Finland and at the Power Systems Development Facility (PSDF) in Wilsonville, AL. After 581 hours of testing in the Karhula facility, the elements retained approximately 87 percent of their as-fabricated strength. In addition, mechanical response testing at Virginia Tech provided a further demonstration of the high level of strain tolerance of the vacuum wound filter elements. Additional testing in the M. W. Kellogg unit at the PSDF has accumulated over 1800 hours of coal firing at temperatures of 760 °C including a severe thermal upset that resulted in the failure of several monolithic oxide elements. No failures of any kind have been reported for the MTI CFCC elements in either of these test campaigns. Additional testing is planned at the M. W. Kellogg unit and Foster Wheeler unit at the PSDF over the next year in order to qualify for consideration for the Lakeland PCFB. Process scale-up issues have been identified and manufacturing plans are being evaluated to meet the needs of future demand.

  3. Waveguide Filter Tutorial Julius O. Smith III

    E-Print Network [OSTI]

    Smith III, Julius Orion

    Waveguide Filter Tutorial Julius O. Smith III Center for Computer Research in Music and Acoustics was adapted from the conference paper "Waveguide Filter Tutorial," by J.O. Smith, Proceedings

  4. A Brief History of Filter Methods

    E-Print Network [OSTI]

    2006-10-10T23:59:59.000Z

    Oct 9, 2006 ... The transition of filter methods to fast local convergence had been an .... iterations. This strategy allows the filter to accept points that would otherwise be rejected. ..... Department of Energy, under Contract W-31-109-ENG-38.

  5. Development of Self-destructing Filter Cake

    E-Print Network [OSTI]

    Rostami, Ameneh

    2010-08-24T23:59:59.000Z

    overcome problems for filter-cake removal in long horizontal and maximum reservoir contact wells because of limitations such as the complex geometry of wells, non-uniform chemical distribution, low contact between cleaning fluids/filter cake, and high...

  6. Automatic tuning of continuous-time filters 

    E-Print Network [OSTI]

    Sumesaglam, Taner

    2004-11-15T23:59:59.000Z

    Integrated high-Q continuous-time filters require adaptive tuning circuits that will correct the filter parameters such as center frequency and quality factor (Q). Three different automatic tuning techniques are introduced. In all of the proposed...

  7. Automatic tuning of continuous-time filters

    E-Print Network [OSTI]

    Sumesaglam, Taner

    2004-11-15T23:59:59.000Z

    Integrated high-Q continuous-time filters require adaptive tuning circuits that will correct the filter parameters such as center frequency and quality factor (Q). Three different automatic tuning techniques are introduced. In all of the proposed...

  8. An energy recovery filter for HVDC systems

    SciTech Connect (OSTI)

    Jiang, X.; Gole, A.M. (Univ. of Manitoba, Winnipeg (Canada). Dept. of Electrical and Computer Engineering)

    1994-01-01T23:59:59.000Z

    The paper investigates the use of a novel filter arrangement for eliminating harmonic instability. The CIGRE benchmark model is selected as the base system. Presented in the paper is an example of harmonic instability which is first eliminated using a conventional low Q filter. Subsequently an energy recovery filter (ER-filter) replaces the conventional low Q filter. It is shown that the ER-filter provides similar performance with a fraction of the power loss when compared with a low Q filter. The dynamic performance of the ER-filter is also demonstrated via the simulations of system start-up and faults. The tool used for this investigation is an electromagnetic transient simulation program.

  9. Analyzing the Limits and Extent of Alpha-Amylase Catalyzed Removal of Starch-Based Filter Cake

    E-Print Network [OSTI]

    Dharwadkar, Pavan S.

    2012-02-14T23:59:59.000Z

    The ability of starch to impart functions including fluid-loss control, cuttings transport, and rheological characteristics to water-based drilling fluids has led to its widespread use in the oil industry. The filter cake deposited by these drilling...

  10. Choked-Flow Inlet Orifice Bubbler for Creating Small Bubbles in Mercury

    SciTech Connect (OSTI)

    Wendel, Mark W [ORNL] [ORNL; Abdou, Ashraf A [ORNL] [ORNL; Riemer, Bernie [ORNL] [ORNL

    2013-01-01T23:59:59.000Z

    Pressure waves created in liquid mercury pulsed spallation targets like the Spallation Neutron Source (SNS) at Oak Ridge National Laboratory, induce cavitation damage on the target container. The cavitation damage is thought to limit the lifetime of the target for power levels at and above 1 MW. One way to mitigate the damage would be to absorb the pressure pulse energy into a dispersed population of small bubbles, however, creating a bubble size distribution that is sufficiently large and disperse in mercury is challenging due to the high surface tension. Also, measuring the population is complicated by the opacity and the high level of turbulent mixing. Recent advances in bubble diagnostics by batch sampling the mercury made it possible to compare bubble populations for different techniques in a SNS-1/20th scale test loop. More than 10 bubblers were tested and the most productive bubblers were taken for in-beam testing at the Los Alamos Neutron Science Center (LANSCE) WNR user facility. One bubbler design, referred to as the inlet-orifice bubbler, that showed moderate success in creating populations also has an added advantage that it could easily be included in the existing SNS full-scale mercury target configuration. Improvements to the bubbler were planned including a reduction of the nozzle size to choke the gas injection, thus steadying the injected mass flow and allowing multiple nozzles to work off of a common plenum. For the first time, reliable bubble population data are available in the prototypical target geometry and can be compared with populations that mitigated cavitation damage. This paper presents those experimental results.

  11. RENDERING FILTERS FOR CONTROLLING DETAIL AND

    E-Print Network [OSTI]

    RENDERING FILTERS FOR CONTROLLING DETAIL AND CREATING EFFECTS CHRISTOPHER ROBERT DECORO may be unified under the general theme of the rendering filter. Generally stated, such a filter is a passive, stateless operator that acts upon a decomposition of terms in the rendering equation

  12. Kalman Filtering with State Equality Constraints

    E-Print Network [OSTI]

    Simon, Dan

    Kalman Filtering with State Equality Constraints DAN SIMON, Member, IEEE Cleveland State University TIEN LI CHIA, Member, IEEE ControlSoft, Inc. Kalman filters are commonly used to estimate the states of a dynamic system. However, in the application of Kalman filters there is often known model or signal

  13. Kalman Filtering in Correlated Losses Sachin Adlakha

    E-Print Network [OSTI]

    Adlakha, Sachin

    Kalman Filtering in Correlated Losses Sachin Adlakha Department of Electrical Engineering Stanford in presence of correlated losses using a Kalman Filter . This scenario arises in performing vehicle tracking for the Kalman estimator to lose some observations. We study the behavior of Kalman filter in such correlated

  14. Distributed Kalman Filter via Gaussian Belief Propagation

    E-Print Network [OSTI]

    Dolev, Danny

    Distributed Kalman Filter via Gaussian Belief Propagation Danny Bickson IBM Haifa Research Lab interpretations. First, we show equivalence to computing one iteration of the Kalman filter. Second, we show that the Kalman filter is a special case of the Gaussian information bottleneck algorithm, when the weight

  15. Ensemble Kalman and H filters Sebastian Reich

    E-Print Network [OSTI]

    Reich, Sebastian

    Ensemble Kalman and H filters Sebastian Reich Universität Potsdam, Institut für Mathematik, Am Neuen Palais 10, D-14469 Potsdam Abstract. The ensemble Kalman filter has become a popular method for nonlinear data assimilation. Standard ensemble Kalman filter implementations need to be modified to avoid

  16. Ensemble Kalman Filtering with Shrinkage Regression Techniques

    E-Print Network [OSTI]

    Eidsvik, Jo

    Ensemble Kalman Filtering with Shrinkage Regression Techniques Jon Sætrom & Henning Omre, Norwegian University of Science and Technology; Summary The classical Ensemble Kalman Filter (EnKF) is known;Introduction The Ensemble Kalman Filter (EnKF) is a Bayesian data assimilation method that in recent years has

  17. KALMAN FILTERING REPRODUCING KERNEL HILBERT SPACES

    E-Print Network [OSTI]

    Slatton, Clint

    KALMAN FILTERING IN REPRODUCING KERNEL HILBERT SPACES Pingping Zhu #12;Outline · Introduction · Related Work · A Novel Extended Kernel Recursive Least Squares · Kernel Kalman Filter based on Conditional · Develop a Kalman filter in the Reproducing kernel Hilbert space (RKHS) Motivation · Kernel methods can

  18. Electrically heated particulate filter restart strategy

    DOE Patents [OSTI]

    Gonze, Eugene V [Pinckney, MI; Ament, Frank [Troy, MI

    2011-07-12T23:59:59.000Z

    A control system that controls regeneration of a particulate filter is provided. The system generally includes a propagation module that estimates a propagation status of combustion of particulate matter in the particulate filter. A regeneration module controls current to the particulate filter to re-initiate regeneration based on the propagation status.

  19. Air bubbles clean produced water for reinjection

    SciTech Connect (OSTI)

    Michnick, M.J. [Univ. of Kansas, Lawrence, KS (United States)

    1995-12-31T23:59:59.000Z

    The reuse of produced water in a waterflood may be hazardous to the health and wealth of the reservoir. Disposal of produced water and finding a new source of water for a waterflood can double your costs. Air flotation is being tested to rehabilitate produced water on a lease in eastern Kansas. The use of air flotation in the oil field is at least forty years old. However, many operators are reluctant to spend the capital for surface equipment to assure a supply of good quality water for their waterflood operation. Before the installation of the air flotation unit only the produced water was filtered through a 75-micron bag and the filter water was then added to the make-up water. Seventy-five micron cartridge filters were used at the wellhead. Both the plant and wellhead filters required frequent replacement. Injection wells averaged more than one cleaning and acidization per year. Since installation of the air flotation unit, the combined produced and makeup water is passed through either a 25-or 10-micron bag filter in the plant and a 10-micron cartridge at the wellhead. The results of the test being conducted by an independent oil operator show a reduction in the cost for the water injection system. This study is part of the Department of Energy Class I PONS with independent oil operators.

  20. KALMAN FILTERING IN REPRODUCING KERNEL HILBERT SPACES PINGPING ZHU

    E-Print Network [OSTI]

    Slatton, Clint

    KALMAN FILTERING IN REPRODUCING KERNEL HILBERT SPACES By PINGPING ZHU A DISSERTATION PRESENTED.1.1 Bayesian Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 2.1.2 Kalman Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 2.1.3 Nonlinear Kalman Filter . . . . . . . . . . . . . . . . . . . . . . . . 19 2.1.3.1 Extended

  1. Water nano-filtration device

    DOE Patents [OSTI]

    Judkins, Roddie R. (Knoxville, TN) [Knoxville, TN

    2009-02-03T23:59:59.000Z

    A water filter includes a porous support characterized by a mean porosity in the range of 20 to 50% and a mean pore size of 2 to 5 .mu.m; and a carbon filter membrane disposed thereon which is characterized by a mean particle size of no more than 50 .mu.m and a mean pore size of no more than 7.2 .mu.m.

  2. Establishment of a research facility for investigating the effects of unsteady inlet flow, pressure gradient and curvature on boundary layer development, wake development and heat transfer

    E-Print Network [OSTI]

    Pardivala, Darayus Noshir

    1991-01-01T23:59:59.000Z

    ESTABLISHMENT OF A RESEARCH FACILITY FOR INVESTIGATING THE EFFECTS OF UNSTEADY INLET FLOW) PRESSURE GRADIENT AND CURVATURE ON BOUNDARY LAYER DEVELOPMENT) %'AKE DEVELOPMENT AND HEAT TRANSFER A Thesis by DARAYUS NOSHIR PARDIVALA Submitted... THE EFFECTS OF UNSTEADY INLET FLOW, PRESSURE GRADIENT AND CURVATURE ON BOUNDARY LAYER DEVELOPMENT, WAKE DEVELOPMENT AND HEAT TRANSFER A Thesis by DARAYUS NOSHIR PARDIVALA Approved as to style and content by: Taher Schobeiri (Chair of Committee) Gerald...

  3. In situ PEM fuel cell water measurements

    SciTech Connect (OSTI)

    Borup, Rodney L [Los Alamos National Laboratory; Mukundan, Rangachary [Los Alamos National Laboratory; Davey, John R [Los Alamos National Laboratory; Spendalow, Jacob S [Los Alamos National Laboratory

    2008-01-01T23:59:59.000Z

    Efficient PEM fuel cell performance requires effective water management. The materials used, their durability, and the operating conditions under which fuel cells run, make efficient water management within a practical fuel cell system a primary challenge in developing commercially viable systems. We present experimental measurements of water content within operating fuel cells. in response to operational conditions, including transients and freezing conditions. To help understand the effect of components and operations, we examine water transport in operating fuel cells, measure the fuel cell water in situ and model the water transport within the fuel cell. High Frequency Resistance (HFR), AC Impedance and Neutron imaging (using NIST's facilities) were used to measure water content in operating fuel cells with various conditions, including current density, relative humidity, inlet flows, flow orientation and variable GDL properties. Ice formation in freezing cells was also monitored both during operation and shut-down conditions.

  4. ELECTROSTATICALLY ENHANCED BARRIER FILTER COLLECTION

    SciTech Connect (OSTI)

    John Erjavec; Michael D. Mann; Ryan Z. Knutson; Michael L. Swanson; Michael E. Collings

    2003-06-01T23:59:59.000Z

    This work was performed through the University of North Dakota (UND) Chemical Engineering Department with assistance from UND's Energy & Environmental Research Center. This research was undertaken in response to the U.S. Department of Energy Federal Technology Center Program Solicitation No. DE-PS26-99FT40479, Support of Advanced Coal Research at U.S. Universities and Colleges. Specifically, this research was in support of the UCR Core Program and addressees Topic 1, Improved Hot-Gas Contaminant and Particulate Removal Techniques, introducing an advanced design for particulate removal. Integrated gasification combined cycle (IGCC) offers the potential for very high efficiency and clean electric generation. In IGCC, the product gas from the gasifier needs to be cleaned of particulate matter to avoid erosion and high-temperature corrosion difficulties arising with the turbine blades. Current methods involve cooling the gases to {approx}100 C to condense alkalis and remove sulfur and particulates using conventional scrubber technology. This ''cool'' gas is then directed to a turbine for electric generation. While IGCC has the potential to reach efficiencies of over 50%, the current need to cool the product gas for cleaning prior to firing it in a turbine is keeping IGCC from reaching its full potential. The objective of the current project was to develop a highly reliable particulate collector system that can meet the most stringent turbine requirements and emission standards, can operate at temperatures above 1500 F, is applicable for use with all U.S. coals, is compatible with various sorbent injection schemes for sulfur and alkali control, can be integrated into a variety of configurations for both pressurized gasification and combustion, increases allowable face velocity to reduce filter system capital cost, and is cost-competitive with existing technologies. The collector being developed is a new concept in particulate control called electrostatically enhanced barrier filter collection (EBFC). This concept combines electrostatic precipitation (ESP) with candle filters in a single unit. Similar technology has been recently proven on a commercial scale for atmospheric applications, but needed to be tested at high temperatures and pressures. The synergy obtained by combining the two control technologies into a single system should actually reduce filter system capital and operating costs and make the system more reliable. More specifically, the ESP is expected to significantly reduce candle filter load and also to limit ash reintrainment, allowing for full recovery of baseline pressure drop during backpulsing of the filters.

  5. Filter for a drill string

    DOE Patents [OSTI]

    Hall, David R. (Provo, UT); Pixton, David S. (Lehi, UT); Briscoe, Michael (Lehi, UT); McPherson, James (Sandy, UT)

    2007-12-04T23:59:59.000Z

    A filter for a drill string comprises a perforated receptacle having an open end and a perforated end and first and second mounting surfaces are adjacent the open end. A transmission element is disposed within each of the first and second mounting surfaces. A capacitor may modify electrical characteristics of an LC circuit that comprises the transmission elements. The respective transmission elements are in communication with each other and with a transmission network integrated into the drill string. The transmission elements may be inductive couplers, direct electrical contacts, or optical couplers. In some embodiments of the present invention, the filter comprises an electronic component. The electronic component may be selected from the group consisting of a sensor, a router, a power source, a clock source, a repeater, and an amplifier.

  6. Ceramic hot-gas filter

    DOE Patents [OSTI]

    Connolly, Elizabeth Sokolinski (Wilmington, DE); Forsythe, George Daniel (Landenberg, PA); Domanski, Daniel Matthew (New Castle, DE); Chambers, Jeffrey Allen (Hockessin, DE); Rajendran, Govindasamy Paramasivam (Boothwyn, PA)

    1999-01-01T23:59:59.000Z

    A ceramic hot-gas candle filter having a porous support of filament-wound oxide ceramic yarn at least partially surrounded by a porous refractory oxide ceramic matrix, and a membrane layer on at least one surface thereof. The membrane layer may be on the outer surface, the inner surface, or both the outer and inner surface of the porous support. The membrane layer may be formed of an ordered arrangement of circularly wound, continuous filament oxide ceramic yarn, a ceramic filler material which is less permeable than the filament-wound support structure, or some combination of continuous filament and filler material. A particularly effective membrane layer features circularly wound filament with gaps intentionally placed between adjacent windings, and a filler material of ceramic particulates uniformly distributed throughout the gap region. The filter can withstand thermal cycling during backpulse cleaning and is resistant to chemical degradation at high temperatures.

  7. Ceramic hot-gas filter

    DOE Patents [OSTI]

    Connolly, E.S.; Forsythe, G.D.; Domanski, D.M.; Chambers, J.A.; Rajendran, G.P.

    1999-05-11T23:59:59.000Z

    A ceramic hot-gas candle filter is described having a porous support of filament-wound oxide ceramic yarn at least partially surrounded by a porous refractory oxide ceramic matrix, and a membrane layer on at least one surface thereof. The membrane layer may be on the outer surface, the inner surface, or both the outer and inner surface of the porous support. The membrane layer may be formed of an ordered arrangement of circularly wound, continuous filament oxide ceramic yarn, a ceramic filler material which is less permeable than the filament-wound support structure, or some combination of continuous filament and filler material. A particularly effective membrane layer features circularly wound filament with gaps intentionally placed between adjacent windings, and a filler material of ceramic particulates uniformly distributed throughout the gap region. The filter can withstand thermal cycling during back pulse cleaning and is resistant to chemical degradation at high temperatures.

  8. Filter for isotopic alteration of mercury vapor

    DOE Patents [OSTI]

    Grossman, Mark W. (Belmont, MA); George, William A. (Gloucestor, MA)

    1989-01-01T23:59:59.000Z

    A filter for enriching the .sup.196 Hg content of mercury, including a reactor, a low pressure electric discharge lamp containing a fill of mercury and an inert gas. A filter is arranged concentrically around the lamp. The reactor is arranged around said filter, whereby radiation from said lamp passes through the filter and into said reactor. The lamp, the filter and the reactor are formed of quartz, and are transparent to ultraviolet light. The .sup.196 Hg concentration in the mercury fill is less than that which is present in naturally occurring mercury, that is less than about 0.146 atomic weight percent. Hydrogen is also included in the fill and serves as a quenching gas in the filter, the hydrogen also serving to prevent disposition of a dark coating on the interior of the filter.

  9. Engineering geology of a mudslide at Bracebridge Inlet, Bathurst Island, Northwest Territories, Canada

    E-Print Network [OSTI]

    Mayer, Terry Ann

    1980-01-01T23:59:59.000Z

    leading to these movements have been identified 0 as the saturation of the soil by water from thawing snow, surface ice and ground ice, and the retention of this water in the active layer by the underlying, impermeable frost table. Hutchinson (1974... of Norway. He concluded that movement took place as a result of frost creep enhanced by short-term localized liquifaction at the thaw plane as the water-saturated soil resettled to fill the voids left by melting ice lenses. With the clearance of ground...

  10. Method and apparatus for filtering gas with a moving granular filter bed

    DOE Patents [OSTI]

    Brown, Robert C. (Ames, IA); Wistrom, Corey (Ames, IA); Smeenk, Jerod L. (Ames, IA)

    2007-12-18T23:59:59.000Z

    A method and apparatus for filtering gas (58) with a moving granular filter bed (48) involves moving a mass of particulate filter material (48) downwardly through a filter compartment (35); tangentially introducing gas into the compartment (54) to move in a cyclonic path downwardly around the moving filter material (48); diverting the cyclonic path (58) to a vertical path (62) to cause the gas to directly interface with the particulate filter material (48); thence causing the gas to move upwardly through the filter material (48) through a screened partition (24, 32) into a static upper compartment (22) of a filter compartment for exodus (56) of the gas which has passed through the particulate filter material (48).

  11. Magnetic filtration process, magnetic filtering material, and methods of forming magnetic filtering material

    DOE Patents [OSTI]

    Taboada-Serrano, Patricia; Tsouris, Constantino; Contescu, Cristian I; McFarlane, Joanna

    2013-10-08T23:59:59.000Z

    The present invention provides magnetically responsive activated carbon, and a method of forming magnetically responsive activated carbon. The method of forming magnetically responsive activated carbon typically includes providing activated carbon in a solution containing ions of ferrite forming elements, wherein at least one of the ferrite forming elements has an oxidation state of +3 and at least a second of the ferrite forming elements has an oxidation state of +2, and increasing pH of the solution to precipitate particles of ferrite that bond to the activated carbon, wherein the activated carbon having the ferrite particles bonded thereto have a positive magnetic susceptibility. The present invention also provides a method of filtering waste water using magnetic activated carbon.

  12. A comparative analysis of the pelvic inlet and body weight of beef females and the relationship to dystocia 

    E-Print Network [OSTI]

    Bennett, Frances Annette

    1973-01-01T23:59:59.000Z

    . Calving ease was scored as to degree of difficulty: 27 Measuring Device Calipers Figure 1. Determination of a Pelvic Measurement with a Measuring Device and Calipers. 28 0 D Hz Figure 2. Pelvic Inlet with reference points for Hz and Vr..., maternal body weight and dystocia scores could provide in-depth answers to some of the proposed theories. ACKNOWLEDGENENTS I am grateful to Dr. T. C. Cartwright, Dr. H. A. Fitzhugh and Dr. J. D. Smith for their guidance given throughout the study. I...

  13. ADVANCED HOT GAS FILTER DEVELOPMENT

    SciTech Connect (OSTI)

    Matthew R. June; John L. Hurley; Mark W. Johnson

    1999-04-01T23:59:59.000Z

    Iron aluminide hot gas filters have been developed using powder metallurgy techniques to form seamless cylinders. Three alloys were short-term corrosion tested in simulated IGCC atmospheres with temperatures between 925 F and 1200 F with hydrogen sulfide concentrations ranging from 783 ppm{sub v} to 78,300 ppm{sub v}. Long-term testing was conducted for 1500 hours at 925 F with 78,300 ppm{sub v}. The FAS and FAL alloys were found to be corrosion resistant in the simulated environments. The FAS alloy has been commercialized.

  14. Face crack reduction strategy for particulate filters

    DOE Patents [OSTI]

    Gonze, Eugene V [Pinckney, MI

    2012-01-31T23:59:59.000Z

    A system comprises a particulate matter (PM) filter that comprises an upstream end for receiving exhaust gas, a downstream end and at least one portion. A control module initiates combustion of PM in the PM filter using a heater and selectively adjusts oxygen levels of the exhaust gas to adjust a temperature of combustion adjacent to the at least one portion of the PM filter. A method comprises providing a particulate matter (PM) filter that comprises an upstream end for receiving exhaust gas, a downstream end and at least one portion; initiating combustion of PM in the PM filter using a heater; selectively adjusting oxygen levels of the exhaust gas to adjust a temperature of combustion adjacent to the at least one portion of the PM filter.

  15. FILTER COMPONENT ASSESSMENT--CERAMIC CANDLES--

    SciTech Connect (OSTI)

    M.A. Alvin

    2004-04-23T23:59:59.000Z

    Efforts at Siemens Westinghouse Power Corporation (SWPC) have been focused on development of hot gas filter systems as an enabling technology for advanced coal and biomass-based gas turbine power generation applications. SWPC has been actively involved in the development of advanced filter materials and component configuration, has participated in numerous surveillance programs characterizing the material properties and microstructure of field tested filter elements, and has undertaken extended, accelerated filter life testing programs. This report summarizes the results of SWPC's filter component assessment efforts, identifying the performance and stability of porous monolithic, fiber reinforced, and filament wound ceramic hot gas candle filters, potentially for {ge}3 years of viable pressurized fluidized-bed combustion (PFBC) service operating life.

  16. Multi-Canister overpack internal HEPA filters

    SciTech Connect (OSTI)

    SMITH, K.E.

    1998-11-03T23:59:59.000Z

    The rationale for locating a filter assembly inside each Multi-Canister Overpack (MCO) rather than include the filter in the Cold Vacuum Drying (CVD) process piping system was to eliminate the potential for contamination to the operators, processing equipment, and the MCO. The internal HEPA filters provide essential protection to facility workers from alpha contamination, both external skin contamination and potential internal depositions. Filters installed in the CVD process piping cannot mitigate potential contamination when breaking the process piping connections. Experience with K-Basin material has shown that even an extremely small release can result in personnel contamination and costly schedule disruptions to perform equipment and facility decontamination. Incorporating the filter function internal to the MCO rather than external is consistent with ALARA requirements of 10 CFR 835. Based on the above, the SNF Project position is to retain the internal HEPA filters in the MCO design.

  17. Diesel particulate filter with zoned resistive heater

    DOE Patents [OSTI]

    Gonze, Eugene V [Pinckney, MI

    2011-03-08T23:59:59.000Z

    A diesel particulate filter assembly comprises a diesel particulate filter (DPF) and a heater assembly. The DPF filters a particulate from exhaust produced by an engine. The heater assembly has a first metallic layer that is applied to the DPF, a resistive layer that is applied to the first metallic layer, and a second metallic layer that is applied to the resistive layer. The second metallic layer is etched to form a plurality of zones.

  18. Zone heated diesel particulate filter electrical connection

    DOE Patents [OSTI]

    Gonze, Eugene V. (Pinckney, MI); Paratore, Jr., Michael J. (Howell, MI)

    2010-03-30T23:59:59.000Z

    An electrical connection system for a particulate filter is provided. The system includes: a particulate filter (PF) disposed within an outer shell wherein the PF is segmented into a plurality of heating zones; an outer mat disposed between the particulate filter and the outer shell; an electrical connector coupled to the outer shell of the PF; and a plurality of printed circuit connections that extend along the outer surface of the PF from the electrical connector to the plurality of heating zones.

  19. DC side filters for multiterminal HVDC systems

    SciTech Connect (OSTI)

    Shore, N.L.; Adamson, K.; Bard, P. [and others] [and others

    1996-10-01T23:59:59.000Z

    Multiterminal HVDC systems present challenges in the specification and design of suitable dc side filtering. This document examines the existing experience and addresses the particular technical problems posed by multiterminal systems. The filtering requirements of small taps are discussed, as is the potential use of active filters. Aspects of calculation and design are considered and recommendations made to guide the planners and designers of future multiterminal schemes.

  20. Continuous air monitor filter changeout apparatus

    DOE Patents [OSTI]

    Rodgers, John C. (Santa Fe, NM)

    2008-07-15T23:59:59.000Z

    An apparatus and corresponding method for automatically changing out a filter cartridge in a continuous air monitor. The apparatus includes: a first container sized to hold filter cartridge replacements; a second container sized to hold used filter cartridges; a transport insert connectively attached to the first and second containers; a shuttle block, sized to hold the filter cartridges that is located within the transport insert; a transport driver mechanism means used to supply a motive force to move the shuttle block within the transport insert; and, a control means for operating the transport driver mechanism.

  1. In-place filter testing summary

    SciTech Connect (OSTI)

    Ortiz, J.P.; Garcia, E.D.; Ortega, J.M.

    1988-03-01T23:59:59.000Z

    The most common method of identifying particle penetration through a filter or adsorber system is through the performance of a periodic penetration test, i.e., in-place test or leak test using an aerosol or gas vapor to challenge the filter or adsorber system. The aerosol is usually formed by vaporization of a liquid, di-2(ethelhexyl sebacate) (DEHS), and allowed to condense to form liquid particles of a certain size and distribution. The gas vapor is formed by vaporization of Freon 11 liquid. The periodic penetration test, although conducted annually, can and has been demonstrated to show the beginning degradation of a filter or adsorber system. Other evidence of penetration can include detection of radiation downstream of the filter system or the existence of an unusually low pressure drop across the filter, i.e., torn filter, etc. However, these kinds of occurrences show up instantaneously and could release radioactive material to the atmosphere before the systems could be shut down. When a filter system fails the in--place test or is showing evidence of.filter or component degradation, corrective measures are put into place in order to return,the system back to its best operating condition. This report presents a summary of all filter tests.

  2. Filters and Components With Inductance Cancellation

    E-Print Network [OSTI]

    Neugebauer, Timothy C.

    Electrical filters are important for attenuating electrical ripple, eliminating electromagnetic interference (EMI) and susceptibility, improving power quality, and minimizing electromagnetic signature. Capacitors are ...

  3. Electrically-Assisted Diesel Particulate Filter Regeneration...

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

    Evaluation pm041lance2011p.pdf More Documents & Publications Electrically-Assisted Diesel Particulate Filter Regeneration Substrate Studies of an Electrically-Assisted Diesel...

  4. Advanced Particulate Filter Technologies for Direct Injection...

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

    Public * Continuing efforts for further CO 2 and PN reduction create a challenging environment for vehicles equipped with DI gasoline engines * Gasoline particulate filters...

  5. A Regenerable Filter for Liquid Argon Purification

    SciTech Connect (OSTI)

    Curioni, A.; Fleming, B.T.; /Yale U.; Jaskierny, W.; Kendziora, C.; Krider, J.; Pordes, S.; /Fermilab; Soderberg, Mitchell Paul; Spitz, J.; /Yale U.; Tope, T.; /Fermilab; Wongjirad, T.; /Yale U.

    2009-03-01T23:59:59.000Z

    A filter system for removing electronegative impurities from liquid argon is described. The active components of the filter are adsorbing molecular sieve and activated-copper-coated alumina granules. The system is capable of purifying liquid argon to an oxygen-equivalent impurity concentration of better than 30 parts per trillion, corresponding to an electron drift lifetime of at least 10 ms. Reduction reactions that occur at {approx} 250 C allow the filter material to be regenerated in situ through a simple procedure. In the following work we describe the filter design, performance, and regeneration process.

  6. GLOBAL CONVERGENCE OF SLANTING FILTER METHODS FOR ...

    E-Print Network [OSTI]

    2006-10-24T23:59:59.000Z

    (h-iteration: the new entry becomes permanent) ... After the iteration is completed, this entry will become permanent in the filter only if ...... A, and exit with success.

  7. Advances in Filter Miniaturization and Design/Analysis of RF MEMS Tunable Filters

    E-Print Network [OSTI]

    Sekar, Vikram

    2012-10-19T23:59:59.000Z

    The main purpose of this dissertation was to address key issues in the design and analysis of RF/microwave filters for wireless applications. Since RF/microwave filters are one of the bulkiest parts of communication systems, their miniaturization...

  8. Guidelines Based on Physical and Numerical Modeling Studies for Jetty Spur Design at Coastal Inlets

    E-Print Network [OSTI]

    US Army Corps of Engineers

    -moving current along the jetty, potentially saving construction and maintenance costs. Also it was noted the beach, where it can nourish the beach, and thus reduce maintenance dredging volumes. Spurs are usually provide a protected area within which land- or water-based equipment can dredge and bypass the accumulated

  9. Two Wien Filter Spin Flipper

    SciTech Connect (OSTI)

    Grames, J M; Benesch, J F; Clark, J; Hansknecht, J; Kazimi, R; Machie, D; Poelker, M; Stutzman, M L; Suleiman, R

    2011-03-01T23:59:59.000Z

    A new 4pi spin manipulator composed of two Wien filters oriented orthogonally and separated by two solenoids has been installed at the CEBAF/Jefferson Lab photoinjector. The new spin manipulator is used to precisely set the electron spin direction at an experiment in any direction (in or out of plane of the accelerator) and provides the means to reverse, or flip, the helicity of the electron beam on a daily basis. This reversal is being employed to suppress systematic false asymmetries that can jeopardize challenging parity violation experiments that strive to measure increasingly small physics asymmetries [*,**,***]. The spin manipulator is part of the ultra-high vacuum polarized electron source beam line and has been successfully operated with 100keV and 130keV electron beam at high current (>100 microAmps). A unique feature of the device is that spin-flipping requires only the polarity of one solenoid magnet be changed. Performance characteristics of the Two Wien Filter Spin Flipper will be summarized.

  10. A study of fractionating inlet systems for the dichotomous air sampler

    E-Print Network [OSTI]

    Ripps, Gerald Joseph

    1979-01-01T23:59:59.000Z

    of Aerosols in Ambient Air", Swedish Water and Air Pollu- tion Research Labs. , S-402 24, Gothenburg, Sweden, (1975). (8) Steen, B. , "The Influence of Different Parameters on the Sampling Efficiency of Some Commonly Used Devices for Measuring Particle... Concentrations in Ambient Air", Ph. D. Thesis, Chalmers Institute of Technology, Gothenburg, Sweden, (1975). (9) Steen, B. , and Andreasson, K. , "Comparative Measure- ments of Particle Concentrations in Ambient Air Made at a Background Station...

  11. A study of postlarval Penaeus aztecus recruitment through Aransas Pass Inlet

    E-Print Network [OSTI]

    Godwin, Erika Marie

    1991-01-01T23:59:59.000Z

    that postlarval abun- dance on an intensive (24-hour) time scale shows a marked tidal periodicity. The transformed abundance of penaeids is most strongly correlated with water level and suggests that if postlarvae are exhibiting the leap-frog type of selective... tidal stream transport, hydrostatic pressure might be the most logical cue. Further, the results show that the daily recruiting abundance of postlarvae greatly varied, The envi- ronmental parameters or physical processes responsible...

  12. Low Latency Stochastic Filtering Software Firewall Architecture

    E-Print Network [OSTI]

    Ghoshal, Pritha

    2012-08-29T23:59:59.000Z

    . . . . . . . . . . . . . . . . . . . . . 29 V METHODOLOGY . . . . . . . . . . . . . . . . . . . . . . . . . 31 VI RESULTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 v VI-A. Incremental Cleared Bloom Filter . . . . . . . . . . . 37 VI-A.1. Latency... . . . . . . . . . . . . . . . . . . . . . . 37 VI-A.2. Bandwidth . . . . . . . . . . . . . . . . . . . . 39 VI-A.3. Reduction in Dropped Packets . . . . . . . . . 40 VI-A.4. False Positive Rate . . . . . . . . . . . . . . . . 42 VI-B. Cold Cleared Bloom Filter...

  13. Thermoluminescence dosimeters with narrow bandpass filters

    DOE Patents [OSTI]

    Walker, Scottie W.

    2004-07-20T23:59:59.000Z

    A dosimetry method exposes more than one thermoluminescence crystals to radiation without using conventional filters, and reads the energy stored in the crystals by converting the energy to light in a conventional manner, and then filters each crystal output in a different portion of the spectrum generated by the crystals.

  14. Active imaging system with Faraday filter

    DOE Patents [OSTI]

    Snyder, J.J.

    1993-04-13T23:59:59.000Z

    An active imaging system has a low to medium powered laser transmitter and receiver wherein the receiver includes a Faraday filter with an ultranarrow optical bandpass and a bare (nonintensified) CCD camera. The laser is locked in the vicinity of the passband of the Faraday filter. The system has high sensitivity to the laser illumination while eliminating solar background.

  15. Method and apparatus for PM filter regeneration

    DOE Patents [OSTI]

    Opris, Cornelius N. (Peoria, IL); Verkiel, Maarten (Metamora, IL)

    2006-01-03T23:59:59.000Z

    A method and apparatus for initiating regeneration of a particulate matter (PM) filter in an exhaust system in an internal combustion engine. The method and apparatus includes determining a change in pressure of exhaust gases passing through the PM filter, and responsively varying an opening of an intake valve in fluid communication with a combustion chamber.

  16. A fuzzy-tuned adaptive Kalman filter 

    E-Print Network [OSTI]

    Painter, John H.; Young Hwan Lho

    1993-12-01T23:59:59.000Z

    In this paper, fuzzy processing is applied to the adaptive Kalman filter. The filter gain coefficients are adapted over a 50 dB range of unknown signal/noise dynamics, using fuzzy membership functions. Specific simulation results are shown for a...

  17. Automatic tuning for linearly tunable filter 

    E-Print Network [OSTI]

    Huang, Sung-Ling

    2004-09-30T23:59:59.000Z

    A new tuning scheme for linearly tunable high-Q filters is proposed. The tuning method is based on using the phase information for both frequency and Q factor tuning. There is no need to find out the relationship between a filter's passband...

  18. Automatic tuning for linearly tunable filter

    E-Print Network [OSTI]

    Huang, Sung-Ling

    2004-09-30T23:59:59.000Z

    A new tuning scheme for linearly tunable high-Q filters is proposed. The tuning method is based on using the phase information for both frequency and Q factor tuning. There is no need to find out the relationship between a filter's passband...

  19. A fuzzy-tuned adaptive Kalman filter

    E-Print Network [OSTI]

    Painter, John H.; Young Hwan Lho

    1993-12-01T23:59:59.000Z

    In this paper, fuzzy processing is applied to the adaptive Kalman filter. The filter gain coefficients are adapted over a 50 dB range of unknown signal/noise dynamics, using fuzzy membership functions. Specific simulation results are shown for a...

  20. Rickard Karlsson ISIS Particle Filtering in Practice

    E-Print Network [OSTI]

    Zhao, Yuxiao

    Rickard Karlsson ISIS 2004-11-04 Particle Filtering in Practice Sensor fusion, Positioning and Tracking Rickard Karlsson Automatic Control Linköping University, SWEDEN rickard@isy.liu.se #12;Rickard Karlsson ISIS Linköping 2004-11-05 Particle Filtering within ISIS from my perspective #12;Rickard Karlsson

  1. Removal of a Permanent IVC Filter

    SciTech Connect (OSTI)

    Kumar, Bangalore C. Anil [Queen's Medical Centre, Department of Radiology (United Kingdom)], E-mail: anil.kumar@doctors.org.uk; Chakraverty, Sam; Zealley, Ian [Ninewells Hospital, Department of Radiology (United Kingdom)

    2006-02-15T23:59:59.000Z

    Inferior vena cava (IVC) filters are increasingly used for prevention of life-threatening pulmonary emboli in patients who have contraindications to anticoagulation therapy. We report a case of the removal of a permanent IVC filter, which was inadvertently inserted due to an incorrect ultrasound report.

  2. Thermovoltaic semiconductor device including a plasma filter

    DOE Patents [OSTI]

    Baldasaro, Paul F. (Clifton Park, NY)

    1999-01-01T23:59:59.000Z

    A thermovoltaic energy conversion device and related method for converting thermal energy into an electrical potential. An interference filter is provided on a semiconductor thermovoltaic cell to pre-filter black body radiation. The semiconductor thermovoltaic cell includes a P/N junction supported on a substrate which converts incident thermal energy below the semiconductor junction band gap into electrical potential. The semiconductor substrate is doped to provide a plasma filter which reflects back energy having a wavelength which is above the band gap and which is ineffectively filtered by the interference filter, through the P/N junction to the source of radiation thereby avoiding parasitic absorption of the unusable portion of the thermal radiation energy.

  3. Method for reducing pressure drop through filters, and filter exhibiting reduced pressure drop

    DOE Patents [OSTI]

    Sappok, Alexander; Wong, Victor

    2014-11-18T23:59:59.000Z

    Methods for generating and applying coatings to filters with porous material in order to reduce large pressure drop increases as material accumulates in a filter, as well as the filter exhibiting reduced and/or more uniform pressure drop. The filter can be a diesel particulate trap for removing particulate matter such as soot from the exhaust of a diesel engine. Porous material such as ash is loaded on the surface of the substrate or filter walls, such as by coating, depositing, distributing or layering the porous material along the channel walls of the filter in an amount effective for minimizing or preventing depth filtration during use of the filter. Efficient filtration at acceptable flow rates is achieved.

  4. Technical Report Implementation and testing of an Ensemble Kalman Filter

    E-Print Network [OSTI]

    Stoffelen, Ad

    Technical Report Implementation and testing of an Ensemble Kalman Filter assimilation system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 5. The Ensemble Kalman Filter 11 5.1. Introduction been to implement an Ensemble Kalman Filter (EnKF) assim- ilation scheme for comb

  5. Microwave-Regenerated Diesel Exhaust Particulate Filter

    SciTech Connect (OSTI)

    Nixdorf, Richard D. (Industrial Ceramic Solution, LLC); Green, Johney Boyd; Story, John M.; Wagner, Robert M. (Oak Ridge National Laboratory)

    2001-03-05T23:59:59.000Z

    Development of a microwave-regenerated particulate filter system has evolved from bench scale work to actual diesel engine experimentation. The filter system was initially evaluated on a stationary mounted 1.2-L diesel engine and was able to remove a significant amount of carbon particles from the exhaust. The ability of the microwave energy to regenerate or clean the filter was also demonstrated on this engine under idle conditions. Based on the 1.2-L experiments, improvements to the filter design and materials were implemented and the system was re-evaluated on a vehicle equipped with a 7.3-L diesel engine. The 7.3-L engine was selected to achieve heavy filter loading in a relatively short period of time. The purpose of these experiments was to evaluate filter-loading capacity, power requirements for regeneration, and filter regeneration efficiency. A more detailed evaluation of the filter was performed on a stationary mounted 1.9-L diesel engine. The effect of exhaust flow rate, loading, transients, and regeneration on filter efficiency was evaluated with this setup. In addition, gaseous exhaust emissions were investigated with and without an oxidation catalyst on the filter cartridge during loading and regeneration. (SAE Paper SAE-2001-01-0903 © 2001 SAE International. This paper is published on this website with permission from SAE International. As a user of this website, you are permitted to view this paper on-line, download this pdf file and print one copy of this paper at no cost for your use only. The downloaded pdf file and printout of this SAE paper may not be copied, distributed or forwarded to others or for the use of others.)

  6. Development of An Empirical Water Quality Model for Stormwater Based on Watershed Land Use in Puget Sound

    SciTech Connect (OSTI)

    Cullinan, Valerie I.; May, Christopher W.; Brandenberger, Jill M.; Judd, Chaeli; Johnston, Robert K.

    2007-03-29T23:59:59.000Z

    The Sinclair and Dyes Inlet watershed is located on the west side of Puget Sound in Kitsap County, Washington, U.S.A. (Figure 1). The Puget Sound Naval Shipyard (PSNS), U.S Environmental Protection Agency (USEPA), the Washington State Department of Ecology (WA-DOE), Kitsap County, City of Bremerton, City of Bainbridge Island, City of Port Orchard, and the Suquamish Tribe have joined in a cooperative effort to evaluate water-quality conditions in the Sinclair-Dyes Inlet watershed and correct identified problems. A major focus of this project, known as Project ENVVEST, is to develop Water Clean-up (TMDL) Plans for constituents listed on the 303(d) list within the Sinclair and Dyes Inlet watershed. Segments within the Sinclair and Dyes Inlet watershed were listed on the State of Washington’s 1998 303(d) because of fecal coliform contamination in marine water, metals in sediment and fish tissue, and organics in sediment and fish tissue (WA-DOE 2003). Stormwater loading was identified by ENVVEST as one potential source of sediment contamination, which lacked sufficient data for a contaminant mass balance calculation for the watershed. This paper summarizes the development of an empirical model for estimating contaminant concentrations in all streams discharging into Sinclair and Dyes Inlets based on watershed land use, 18 storm events, and wet/dry season baseflow conditions between November 2002 and May 2005. Stream pollutant concentrations along with estimates for outfalls and surface runoff will be used in estimating the loading and ultimately in establishing a Water Cleanup Plan (TMDL) for the Sinclair-Dyes Inlet watershed.

  7. Water augmented indirectly-fired gas turbine systems and method

    DOE Patents [OSTI]

    Bechtel, Thomas F. (Lebanon, PA); Parsons, Jr., Edward J. (Morgantown, WV)

    1992-01-01T23:59:59.000Z

    An indirectly-fired gas turbine system utilizing water augmentation for increasing the net efficiency and power output of the system is described. Water injected into the compressor discharge stream evaporatively cools the air to provide a higher driving temperature difference across a high temperature air heater which is used to indirectly heat the water-containing air to a turbine inlet temperature of greater than about 1,000.degree. C. By providing a lower air heater hot side outlet temperature, heat rejection in the air heater is reduced to increase the heat recovery in the air heater and thereby increase the overall cycle efficiency.

  8. Non-Destructive Neutron Imaging to Analyze Particulate Filters...

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

    Neutron Imaging to Analyze Particulate Filters Non-Destructive Neutron Imaging to Analyze Particulate Filters Non-destructive, non-invasive imaging is being employed in the...

  9. U-252: Barracuda Web Filter Input Validation Flaws Permit Cross...

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

    2: Barracuda Web Filter Input Validation Flaws Permit Cross-Site Scripting Attacks U-252: Barracuda Web Filter Input Validation Flaws Permit Cross-Site Scripting Attacks September...

  10. Durability of Diesel Engine Particulate Filters (Agreement ID...

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

    Durability of Diesel Engine Particulate Filters (Agreement ID:10461) Durability of Diesel Engine Particulate Filters (Agreement ID:10461) 2013 DOE Hydrogen and Fuel Cells Program...

  11. active filter system: Topics by E-print Network

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

    26 EEE 405 Filter Design (3) Course (Catalog) Description: Principles of active and passive filter design, frequency domain Computer Technologies and Information Sciences...

  12. advanced harmonic filter: Topics by E-print Network

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

    Hazem ZUBI Signature: 12;iv ABSTRACT LOWPASS BROADBAND HARMONIC FILTER DESIGN Zubi passive harmonic filter (IBF) for three phase diode rectifier front-end type adjustable speed...

  13. Precise attention filters for Weber contrast derived from centroid estimations

    E-Print Network [OSTI]

    Sperling, George

    Precise attention filters for Weber contrast derived from centroid estimations Department attention filters for Weber contrast derived from centroid estimations. Journal of Vision, 10(10):20, 1

  14. Demonstrated Petroleum Reduction Using Oil Bypass Filter Technology...

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

    Demonstrated Petroleum Reduction Using Oil Bypass Filter Technology on Heavy and Light Vehicles Demonstrated Petroleum Reduction Using Oil Bypass Filter Technology on Heavy and...

  15. Value Analysis of Alternative Diesel Particulate Filter (DPF...

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

    Value Analysis of Alternative Diesel Particulate Filter (DPF) Substrates for Future Diesel Aftertreatment Systems Value Analysis of Alternative Diesel Particulate Filter (DPF)...

  16. Radio Frequency Diesel Particulate Filter Sensor Reduces Fuel...

    Office of Environmental Management (EM)

    Radio Frequency Diesel Particulate Filter Sensor Reduces Fuel Consumption, Wins R&D 100 Award Radio Frequency Diesel Particulate Filter Sensor Reduces Fuel Consumption, Wins R&D...

  17. New Cordierite Diesel Particulate Filters for Catalyzed and Non...

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

    Cordierite Diesel Particulate Filters for Catalyzed and Non-Catalyzed Applications New Cordierite Diesel Particulate Filters for Catalyzed and Non-Catalyzed Applications 2003 DEER...

  18. CARB Verification of Catalyzed Diesel Particulate Filters for...

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

    CARB Verification of Catalyzed Diesel Particulate Filters for Emergency Generator Sets CARB Verification of Catalyzed Diesel Particulate Filters for Emergency Generator Sets 2005...

  19. Ultra-Lite Diesel Particulate Filter Cartridge for Reduced Regeneratio...

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

    Lite Diesel Particulate Filter Cartridge for Reduced Regeneration Time and Fuel Consumption Ultra-Lite Diesel Particulate Filter Cartridge for Reduced Regeneration Time and Fuel...

  20. Versatile Diesel Particulate Filter Cartridge Any Size, Any Shape...

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

    Versatile Diesel Particulate Filter Cartridge Any Size, Any Shape Versatile Diesel Particulate Filter Cartridge Any Size, Any Shape Presentation given at DEER 2006, August 20-24,...

  1. absolute filters estudio: Topics by E-print Network

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

    40 different filters in the General Catalog of Photometric Data as well as those from Tycho-2 and Hipparcos. We show that utilizing inaccurate filter profiles from the...

  2. Single Wall Diesel Particulate Filter (DPF) Filtration Efficiency...

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

    Single Wall Diesel Particulate Filter (DPF) Filtration Efficiency Studies Using Laboratory Generated Particles. Single Wall Diesel Particulate Filter (DPF) Filtration Efficiency...

  3. California Energy Standards Recognize the Importance of Filter...

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

    California "Title 24" Energy Code requiring filter manufacturers, HVAC designers, and HERS raters to make changes that will encourage the use of higher MERV filters without...

  4. Water Resources Water Quality and Water Treatment

    E-Print Network [OSTI]

    Sohoni, Milind

    Water Resources TD 603 Lecture 1: Water Quality and Water Treatment CTARA Indian Institute of Technology, Bombay 2nd November, 2011 #12;OVERVIEW Water Quality WATER TREATMENT PLANTS WATER TREATMENT PLANTS WATER TREATMENT PLANTS WATER TRE OVERVIEW OF THE LECTURE 1. Water Distribution Schemes Hand Pump

  5. Multiple stage multiple filter hydrate store

    DOE Patents [OSTI]

    Bjorkman, H.K. Jr.

    1983-05-31T23:59:59.000Z

    An improved hydrate store for a metal halogen battery system is disclosed which employs a multiple stage, multiple filter means for separating the halogen hydrate from the liquid used in forming the hydrate. The filter means is constructed in the form of three separate sections which combine to substantially cover the interior surface of the store container. Exit conduit means is provided in association with the filter means for transmitting liquid passing through the filter means to a hydrate former subsystem. The hydrate former subsystem combines the halogen gas generated during the charging of the battery system with the liquid to form the hydrate in association with the store. Relief valve means is interposed in the exit conduit means for controlling the operation of the separate sections of the filter means, such that the liquid flow through the exit conduit means from each of the separate sections is controlled in a predetermined sequence. The three separate sections of the filter means operate in three discrete stages to provide a substantially uniform liquid flow to the hydrate former subsystem during the charging of the battery system. The separation of the liquid from the hydrate causes an increase in the density of the hydrate by concentrating the hydrate along the filter means. 7 figs.

  6. Multiple stage multiple filter hydrate store

    DOE Patents [OSTI]

    Bjorkman, Jr., Harry K. (Birmingham, MI)

    1983-05-31T23:59:59.000Z

    An improved hydrate store for a metal halogen battery system is disclosed which employs a multiple stage, multiple filter means or separating the halogen hydrate from the liquid used in forming the hydrate. The filter means is constructed in the form of three separate sections which combine to substantially cover the interior surface of the store container. Exit conduit means is provided in association with the filter means for transmitting liquid passing through the filter means to a hydrate former subsystem. The hydrate former subsystem combines the halogen gas generated during the charging of the battery system with the liquid to form the hydrate in association with the store. Relief valve means is interposed in the exit conduit means for controlling the operation of the separate sections of the filter means, such that the liquid flow through the exit conduit means from each of the separate sections is controlled in a predetermined sequence. The three separate sections of the filter means operate in three discrete stages to provide a substantially uniform liquid flow to the hydrate former subsystem during the charging of the battery system. The separation of the liquid from the hydrate causes an increase in the density of the hydrate by concentrating the hydrate along the filter means.

  7. Effect of inlet geometries and heating on the entrance and fully-developed friction factors in the laminar and transition regions of a horizontal tube

    E-Print Network [OSTI]

    Ghajar, Afshin J.

    developed regions of a horizontal tube under different flow regimes is presented. For this purpose, accurate in the laminar and transition regions of a horizontal tube Hou Kuan Tam a , Lap Mou Tam a,b , Afshin J. Ghajar c diameter horizontal circular straight tube with square-edged and re-entrant inlets under isothermal and non

  8. Electrically heated particulate filter embedded heater design

    DOE Patents [OSTI]

    Gonze, Eugene V.; Chapman, Mark R.

    2014-07-01T23:59:59.000Z

    An exhaust system that processes exhaust generated by an engine is provided. The system generally includes a particulate filter (PF) that filters particulates from the exhaust wherein an upstream end of the PF receives exhaust from the engine and wherein an upstream surface of the particulate filter includes machined grooves. A grid of electrically resistive material is inserted into the machined grooves of the exterior upstream surface of the PF and selectively heats exhaust passing through the grid to initiate combustion of particulates within the PF.

  9. Neutron Imaging of Diesel Particulate Filters

    SciTech Connect (OSTI)

    Strzelec, Andrea [ORNL; Bilheux, Hassina Z [ORNL; FINNEY, Charles E A [ORNL; Daw, C Stuart [ORNL; Foster, Prof. Dave [University of Wisconsin; Rutland, Prof. Christopher J. [University of Wisconsin; Schillinger, Burkhard [FRM-II, Technische Universitaet Munchen; Schulz, Michael [FRM-II, Technische Universitaet Munchen

    2009-01-01T23:59:59.000Z

    This article presents nondestructive neutron computed tomography (nCT) measurements of Diesel Particulate Filters (DPFs) as a method to measure ash and soot loading in the filters. Uncatalyzed and unwashcoated 200cpsi cordierite DPFs exposed to 100% biodiesel (B100) exhaust and conventional ultra low sulfur 2007 certification diesel (ULSD) exhaust at one speed-load point (1500rpm, 2.6bar BMEP) are compared to a brand new (never exposed) filter. Precise structural information about the substrate as well as an attempt to quantify soot and ash loading in the channel of the DPF illustrates the potential strength of the neutron imaging technique.

  10. Metrics For Comparing Plasma Mass Filters

    SciTech Connect (OSTI)

    Abraham J. Fetterman and Nathaniel J. Fisch

    2012-08-15T23:59:59.000Z

    High-throughput mass separation of nuclear waste may be useful for optimal storage, disposal, or environmental remediation. The most dangerous part of nuclear waste is the fission product, which produces most of the heat and medium-term radiation. Plasmas are well-suited to separating nuclear waste because they can separate many different species in a single step. A number of plasma devices have been designed for such mass separation, but there has been no standardized comparison between these devices. We define a standard metric, the separative power per unit volume, and derive it for three different plasma mass filters: the plasma centrifuge, Ohkawa filter, and the magnetic centrifugal mass filter. __________________________________________________

  11. Metrics for comparing plasma mass filters

    SciTech Connect (OSTI)

    Fetterman, Abraham J.; Fisch, Nathaniel J. [Department of Astrophysical Sciences, Princeton University, Princeton, New Jersey 08540 (United States)

    2011-10-15T23:59:59.000Z

    High-throughput mass separation of nuclear waste may be useful for optimal storage, disposal, or environmental remediation. The most dangerous part of nuclear waste is the fission product, which produces most of the heat and medium-term radiation. Plasmas are well-suited to separating nuclear waste because they can separate many different species in a single step. A number of plasma devices have been designed for such mass separation, but there has been no standardized comparison between these devices. We define a standard metric, the separative power per unit volume, and derive it for three different plasma mass filters: the plasma centrifuge, Ohkawa filter, and the magnetic centrifugal mass filter.

  12. Ozone Removal by Filters Containing Activated Carbon: A Pilot Study

    SciTech Connect (OSTI)

    Fisk, William; Spears, Mike; Sullivan, Douglas; Mendell, Mark

    2009-09-01T23:59:59.000Z

    This study evaluated the ozone removal performance of moderate-cost particle filters containing activated carbon when installed in a commercial building heating, ventilating, and air conditioning (HVAC) system. Filters containing 300 g of activated carbon per 0.09 m2 of filter face area were installed in two 'experimental' filter banks within an office building located in Sacramento, CA. The ozone removal performance of the filters was assessed through periodic measurements of ozone concentrations in the air upstream and downstream of the filters. Ozone concentrations were also measured upstream and downstream of a 'reference' filter bank containing filters without any activated carbon. The filter banks with prefilters containing activated carbon were removing 60percent to 70percent of the ozone 67 and 81 days after filter installation. In contrast, there was negligible ozone removal by the reference filter bank without activated carbon.

  13. Method and apparatus for a self-cleaning filter

    DOE Patents [OSTI]

    Diebold, James P. (Lakewood, CO); Lilley, Arthur (Finleyville, PA); Browne, III, Kingsbury (Golden, CO); Walt, Robb Ray (Aurora, CO); Duncan, Dustin (Littleton, CO); Walker, Michael (Longmont, CO); Steele, John (Aurora, CO); Fields, Michael (Arvada, CO)

    2010-11-16T23:59:59.000Z

    A method and apparatus for removing fine particulate matter from a fluid stream without interrupting the overall process or flow. The flowing fluid inflates and expands the flexible filter, and particulate is deposited on the filter media while clean fluid is permitted to pass through the filter. This filter is cleaned when the fluid flow is stopped, the filter collapses, and a force is applied to distort the flexible filter media to dislodge the built-up filter cake. The dislodged filter cake falls to a location that allows undisrupted flow of the fluid after flow is restored. The shed particulate is removed to a bin for periodic collection. A plurality of filter cells can operate independently or in concert, in parallel, or in series to permit cleaning the filters without shutting off the overall fluid flow. The self-cleaning filter is low cost, has low power consumption, and exhibits low differential pressures.

  14. Appropriate technology water treatment processes for MaeLa Temporary Shelter, Thailand

    E-Print Network [OSTI]

    Vater, Katherine Ann

    2008-01-01T23:59:59.000Z

    This thesis recommends the use of horizontal-flow roughing filters to treat spring water of variable annual quality in MaeLa Temporary Shelter, Thailand. The public drinking water system for 45,000 refugees is overseen by ...

  15. An improved visualization of diesel particulate filter/

    E-Print Network [OSTI]

    Boehm, Kevin (Kevin W.)

    2011-01-01T23:59:59.000Z

    The prevalence of diesel particulate filters (DPF) is increasing as emissions standards worldwide evolve to match current technologies. Since the first application of DPFs in the 1980's, PM trapping effectiveness has ...

  16. Durability of Diesel Engine Particulate Filters

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

    Durability of Diesel Engine Particulate Filters Thomas Watkins, Amit Shyam, H.T. Lin, Edgar Lara-Curzio and Amit Pandey; ORNL Randall Stafford; Cummins Inc. Sponsored by U.S....

  17. Linear Programming Algorithms for Sparse Filter Design

    E-Print Network [OSTI]

    Baran, Thomas A.

    In designing discrete-time filters, the length of the impulse response is often used as an indication of computational cost. In systems where the complexity is dominated by arithmetic operations, the number of nonzero ...

  18. Integrated electric alternators/active filters

    E-Print Network [OSTI]

    Abolhassani, Mehdi Towliat

    2004-09-30T23:59:59.000Z

    In response to energy crisis and power quality concerns, three different methodologies to integrate the concept of active filtering into the alternators are proposed. Wind energy, due to its free availability and its clean and renewable character...

  19. Optimization of tunable silicon compatible microring filters

    E-Print Network [OSTI]

    Amatya, Reja

    2008-01-01T23:59:59.000Z

    Microring resonators can be used as pass-band filters for wavelength division demultiplexing in electronic-photonic integrated circuits for applications such as analog-to-digital converters (ADCs). For high quality signal ...

  20. Plasma Mass Filters For Nuclear Waste Reprocessing

    SciTech Connect (OSTI)

    Abraham J. Fetterman and Nathaniel J. Fisch

    2011-05-26T23:59:59.000Z

    Practical disposal of nuclear waste requires high-throughput separation techniques. The most dangerous part of nuclear waste is the fission product, which contains the most active and mobile radioisotopes and produces most of the heat. We suggest that the fission products could be separated as a group from nuclear waste using plasma mass filters. Plasmabased processes are well suited to separating nuclear waste, because mass rather than chemical properties are used for separation. A single plasma stage can replace several stages of chemical separation, producing separate streams of bulk elements, fission products, and actinoids. The plasma mass filters may have lower cost and produce less auxiliary waste than chemical processing plants. Three rotating plasma configurations are considered that act as mass filters: the plasma centrifuge, the Ohkawa filter, and the asymmetric centrifugal trap.

  1. Plasma Mass Filters For Nuclear Waste Reprocessing

    SciTech Connect (OSTI)

    Abraham J. Fetterman and Nathaniel J. Fisch

    2011-05-25T23:59:59.000Z

    Practical disposal of nuclear waste requires high-throughput separation techniques. The most dangerous part of nuclear waste is the fission product, which contains the most active and mobile radioisotopes and produces most of the heat. We suggest that the fission products could be separated as a group from nuclear waste using plasma mass filters. Plasmabased processes are well suited to separating nuclear waste, because mass rather than chemical properties are used for separation. A single plasma stage can replace several stages of chemical separation, producing separate streams of bulk elements, fission products, and actinoids. The plasma mass filters may have lower cost and produce less auxiliary waste than chemical processing plants. Three rotating plasma configurations are considered that act as mass filters: the plasma centrifuge, the Ohkawa filter, and the asymmetric centrifugal trap.

  2. A Filter Algorithm for Nonlinear Semidefinite Programming

    E-Print Network [OSTI]

    2006-10-26T23:59:59.000Z

    SSDP using a merit function (called Han penalty function) and a line search strategy. ... functions with penalty terms which adjustment can be problematic. ...... Furthermore, (22c) ensures that (?(xk), f(xk)) does not enter to the filter Fk?1.

  3. Piezoelectric MEMS resonator characterization and filter design

    E-Print Network [OSTI]

    Kang, Joung-Mo, 1978-

    2004-01-01T23:59:59.000Z

    This thesis presents modeling and first measurements of a new piezoelectric MEMS resonator developed at Draper Laboratory. In addition, some simple filter designs incorporating the resonator with predicted performance ...

  4. Efficient implementation schemes for image enhancement filters 

    E-Print Network [OSTI]

    Yusuf, Khadem Mahmud

    1994-01-01T23:59:59.000Z

    Generalized median filtering techniques that have appeared in previous literature suffer from some severe disadvantages. They are not only hardware intensive and time consuming but also tend to smear image edges. These shortcomings can be overcome...

  5. Onsite Wastewater Treatment Systems: Sand Filters 

    E-Print Network [OSTI]

    Lesikar, Bruce J.

    2008-10-23T23:59:59.000Z

    Sand filters are beds of granular material, or sand, drained from underneath so that pretreated wastewater can be treated, collected and distributed to a land application system. This publication explains the treatment, design, operation...

  6. Onsite Wastewater Treatment Systems: Sand Filters

    E-Print Network [OSTI]

    Lesikar, Bruce J.

    2008-10-23T23:59:59.000Z

    Sand filters are beds of granular material, or sand, drained from underneath so that pretreated wastewater can be treated, collected and distributed to a land application system. This publication explains the treatment, design, operation...

  7. Efficient implementation schemes for image enhancement filters

    E-Print Network [OSTI]

    Yusuf, Khadem Mahmud

    1994-01-01T23:59:59.000Z

    Generalized median filtering techniques that have appeared in previous literature suffer from some severe disadvantages. They are not only hardware intensive and time consuming but also tend to smear image edges. These shortcomings can be overcome...

  8. Robust ensemble filtering and its relation to covariance inflation in the ensemble Kalman filter

    E-Print Network [OSTI]

    Xiaodong Luo; Ibrahim Hoteit

    2011-07-31T23:59:59.000Z

    We propose a robust ensemble filtering scheme based on the $H_{\\infty}$ filtering theory. The optimal $H_{\\infty}$ filter is derived by minimizing the supremum (or maximum) of a predefined cost function, a criterion different from the minimum variance used in the Kalman filter. By design, the $H_{\\infty}$ filter is more robust than the Kalman filter, in the sense that the estimation error in the $H_{\\infty}$ filter in general has a finite growth rate with respect to the uncertainties in assimilation, except for a special case that corresponds to the Kalman filter. The original form of the $H_{\\infty}$ filter contains global constraints in time, which may be inconvenient for sequential data assimilation problems. Therefore we introduce a variant that solves some time-local constraints instead, and hence we call it the time-local $H_{\\infty}$ filter (TLHF). By analogy to the ensemble Kalman filter (EnKF), we also propose the concept of ensemble time-local $H_{\\infty}$ filter (EnTLHF). We outline the general form of the EnTLHF, and discuss some of its special cases. In particular, we show that an EnKF with certain covariance inflation is essentially an EnTLHF. In this sense, the EnTLHF provides a general framework for conducting covariance inflation in the EnKF-based methods. We use some numerical examples to assess the relative robustness of the TLHF/EnTLHF in comparison with the corresponding KF/EnKF method.

  9. NONDESTRUCTIVE EVALUATION OF CERAMIC CANDLE FILTERS

    SciTech Connect (OSTI)

    Roger H.L. Chen, Ph.D.; Alejandro Kiriakidis

    1999-09-01T23:59:59.000Z

    Nondestructive evaluation (NDE) techniques have been used to reduce the potential mechanical failures and to improve the reliability of a structure. Failure of a structure is usually initiated at some type of flaw in the material. NDE techniques have been developed to determine the presence of flaws larger than an acceptable size and to estimate the remaining stiffness of a damaged structure (Chen, et. al, 1995). Ceramic candle filters have been tested for use in coal-fueled gas turbine systems. They protect gas turbine components from damage due to erosion. A total of one hundred and one candle filters were nondestructively evaluated in this study. Ninety-eight ceramic candle filters and three ceramic composite filters have been nondestructively inspected using dynamic characterization technique. These ceramic filters include twelve unused Coors alumina/mullite, twenty-four unused and fifteen used Schumacher-Dia-Schumalith TF-20, twenty-five unused and nine used Refractron 326, eight unused and three used Refractron 442T, one new Schumacher-T 10-20, and one used Schumacher-Dia-Schumalith F-40. All filters were subjected to a small excitation and the dynamic response was picked up by a piezoelectric accelerometer. The evaluation of experimental results was processed using digital signal analysis technique including various forms of data transformation. The modal parameters for damage assessment for the unexposed (unused) vs. exposed (used) specimen were based on two vibration parameters: natural frequencies and mode shapes. Finite Element models were built for each specimen type to understand its dynamic response. Linear elastic modal analysis was performed using eight nodes, three-dimensional isotropic solid elements. Conclusions based on our study indicate that dynamic characterization is a feasible NDE technique in studying structural properties of ceramic candle filters. It has been shown that the degradation of the filters due to long working hours (or excessive back pulsing conditions and high temperature transient) could be reflected from the shift of vibration frequencies. These shifts are due to changes in structural properties such as stiffness, which are directly related to the Young's modulus of the candle filters. Further studies are necessary in implementing and verifying the applicability of dynamic NDE characterization methods for actual in-situ conditions, and in establishing a systematic testing procedure for field applications. Also investigations on the filter's natural frequency due to the effect of dust cake or due to the change of boundary conditions may provide insight as to how the filter will perform in the field.

  10. Electrical diesel particulate filter (DPF) regeneration

    DOE Patents [OSTI]

    Gonze, Eugene V; Ament, Frank

    2013-12-31T23:59:59.000Z

    An exhaust system that processes exhaust generated by an engine includes a diesel particulate filter (DPF) that is disposed downstream of the engine and that filters particulates from the exhaust. An electrical heater is disposed upstream of the DPF and selectively heats the exhaust to initiate combustion of the particulates within the exhaust as it passes therethrough. Heat generated by combustion of the particulates induces combustion of particulates within the DPF.

  11. Mechanical analysis of a cross flow filter

    SciTech Connect (OSTI)

    Alvin, M.A.; Lippert, T.E.; Attaar, M.H.; McNerney, K.R.

    1992-12-01T23:59:59.000Z

    Material properties have also been generated at the Argonne National Laboratories which detail the fracture toughness, Weibull modulus, and critical flaw size for a specifically fabricated lot of P-100A alumina/mullite cross flow filters.(Singh, 1990) The critical flaw size within the P-100A matrix was estimated to be {approximately}500 {mu},m which includes both large interconnected pores, as well as potentially debonded areas along the mid-rib or gas channel seams. Critical flaws are generally considered as potential failure initiation sites within the ceramic matrix. In addition maximum filter element stress levels induced by the process system have been estimated at ANL through the use of finite element computer analyses. These efforts project that the highest stresses result within the flange region of the cross flow filter. As a result of these projections, efforts at Coors Ceramics were directed to improving the overall strength of the alumina/mullite material which is used for cross flow filter fabrication. The results of the efforts at Coors Ceramics provide a significant improvement in the hot strength of the P-100A alumina/mullite filter matrix. Westinghouse assessed the existing nondestructive evaluation (NDE) techniques in terms of identifying methods for detecting critical flaws within the cross flow filter body. To date viable, cost effective methods for detecting critical flaws within the P-100A alumina/mullite matrix, or along the mid-rib bonds or gas channel seams in the full-scale, porous ceramic cross flow filter element are not readily available. As an alternate approach, Westinghouse focused its attention on developing NDE techniques as inspection methods for evaluating the extent of bonding along the mid-rib bonds and gas channel seams which results during the various fabrication stages of the cross flow filter element.

  12. Mechanical analysis of a cross flow filter

    SciTech Connect (OSTI)

    Alvin, M.A.; Lippert, T.E.; Attaar, M.H.; McNerney, K.R.

    1992-01-01T23:59:59.000Z

    Material properties have also been generated at the Argonne National Laboratories which detail the fracture toughness, Weibull modulus, and critical flaw size for a specifically fabricated lot of P-100A alumina/mullite cross flow filters.(Singh, 1990) The critical flaw size within the P-100A matrix was estimated to be [approximately]500 [mu],m which includes both large interconnected pores, as well as potentially debonded areas along the mid-rib or gas channel seams. Critical flaws are generally considered as potential failure initiation sites within the ceramic matrix. In addition maximum filter element stress levels induced by the process system have been estimated at ANL through the use of finite element computer analyses. These efforts project that the highest stresses result within the flange region of the cross flow filter. As a result of these projections, efforts at Coors Ceramics were directed to improving the overall strength of the alumina/mullite material which is used for cross flow filter fabrication. The results of the efforts at Coors Ceramics provide a significant improvement in the hot strength of the P-100A alumina/mullite filter matrix. Westinghouse assessed the existing nondestructive evaluation (NDE) techniques in terms of identifying methods for detecting critical flaws within the cross flow filter body. To date viable, cost effective methods for detecting critical flaws within the P-100A alumina/mullite matrix, or along the mid-rib bonds or gas channel seams in the full-scale, porous ceramic cross flow filter element are not readily available. As an alternate approach, Westinghouse focused its attention on developing NDE techniques as inspection methods for evaluating the extent of bonding along the mid-rib bonds and gas channel seams which results during the various fabrication stages of the cross flow filter element.

  13. Interferometric tomography of fuel cells for monitoring membrane water content

    E-Print Network [OSTI]

    Waller, Laura

    We have developed a system that uses two 1D interferometric phase projections for reconstruction of 2D water content changes over time in situ in a proton exchange membrane (PEM) fuel cell system. By modifying the filtered ...

  14. Parameter Estimation Using Dual Fractional Power Filters Jason M. Kinser

    E-Print Network [OSTI]

    Kinser, Jason M.

    discriminant functions (SDF) which are reviewed in ref. 9. Unlike the previous methods, the SDF class of the SDF class. These filters are Fractional Power Filters (FPFs) which will be reviewed in Section 2 is a superset of two standard SDF-class filters: the SDF and the MACE filter. This section will review the SDF

  15. Spacetime Kalman filter Noel Cressie & Christopher K. Wikle

    E-Print Network [OSTI]

    Space­time Kalman filter Noel Cressie & Christopher K. Wikle Volume 4, pp 2045­2049 in Encyclopedia, Chichester, 2002 #12;Space­time Kalman filter The Kalman filter arose out of R.E. Kalman's interest, in fact, that the Kalman filter quickly became an essential component of modern control theory

  16. Kalman and Extended Kalman Filters: Concept, Derivation and Properties

    E-Print Network [OSTI]

    Ribeiro,Isabel

    Kalman and Extended Kalman Filters: Concept, Derivation and Properties Maria Isabel Ribeiro for Gaussian Random Vectors . . . . . . . . . . 12 4 The Kalman Filter 14 4.1 Kalman Filter dynamics . . . . . . . . . . . . . . . . . . . . . . . 15 4.2 One-step ahead prediction dynamics . . . . . . . . . . . . . . . . 22 4.3 Kalman filter

  17. AN UNSCENTED KALMAN FILTER FOR FREEWAY TRAFFIC ESTIMATION

    E-Print Network [OSTI]

    Mihaylova, Lyudmila

    AN UNSCENTED KALMAN FILTER FOR FREEWAY TRAFFIC ESTIMATION L. Mihaylova , R. Boel and A. Hegyi at boundaries between some segments and averaged within regular time intervals. An Unscented Kalman filter state. Keywords: macroscopic traffic models, unscented Kalman filter, particle filter 1. INTRODUCTION

  18. Kalman Filters to Reduce Noise Effects during External

    E-Print Network [OSTI]

    Mauel, Michael E.

    Kalman Filters to Reduce Noise Effects during External Kink Control M. E. Mauel, J. Farrington, J for the implementation of a Kalman filter that tracks kink mode dynamics as recently described (M. E. Mauel, et al., NF · Simple digital filter · Kalman filter Key Results · Feedback control of HBT-EP and DIII-D requires

  19. UNSCENTED KALMAN FILTERING FOR SPACECRAFT ATTITUDE STATE AND PARAMETER ESTIMATION

    E-Print Network [OSTI]

    Hall, Christopher D.

    AAS-04-115 UNSCENTED KALMAN FILTERING FOR SPACECRAFT ATTITUDE STATE AND PARAMETER ESTIMATION Matthew C. VanDyke , Jana L. Schwartz , Christopher D. Hall An Unscented Kalman Filter (UKF) is derived with an Extended Kalman Filter (EKF). The EKF is an extension of the linear Kalman Filter for nonlinear systems

  20. Design guidelines for granular particles in a conical centrifugal filter

    E-Print Network [OSTI]

    Fleck, Norman A.

    Design guidelines for granular particles in a conical centrifugal filter A.F.M. Bizarda , D centrifugal filter is thereby obtained as a function of the slurry and basket properties. Corresponding basket) 1. Introduction 1.1. Centrifugal filters Centrifugal filters are commonly used in the food

  1. Inferior Vena Cava Filter Fracture: Potential Liability for Emergency Physicians

    E-Print Network [OSTI]

    Pescatore, Richard M.; Baumann, Brigitte M.; Nocchi, David

    2015-01-01T23:59:59.000Z

    Figure 2. Sagittal computed tomography view of lumbosacralfilter leg (Figure 1). Computed tomography showed the filter

  2. Proceedings: Indoor Air 2005 OZONE REMOVAL BY RESIDENTIAL HVAC FILTERS

    E-Print Network [OSTI]

    Siegel, Jeffrey

    Proceedings: Indoor Air 2005 2366 OZONE REMOVAL BY RESIDENTIAL HVAC FILTERS P Zhao1,2 , JA Siegel1, Austin, Texas 78758, USA ABSTRACT HVAC filters have a significant influence on indoor air quality% for Filter #2 at a face velocity of 0.81 cm/s. The potential for HVAC filters to affect ozone concentrations

  3. Removal of residual particulate matter from filter media

    DOE Patents [OSTI]

    Almlie, Jay C; Miller, Stanley J

    2014-11-11T23:59:59.000Z

    A method for removing residual filter cakes that remain adhered to a filter after typical particulate removal methodologies have been employed, such as pulse-jet filter element cleaning, for all cleanable filters used for air pollution control, dust control, or powder control.

  4. Using liquid desiccant as a regenerable filter for capturing and deactivating contaminants

    DOE Patents [OSTI]

    Slayzak, Steven J. (Denver, CO); Anderson, Ren S. (Broomfield, CO); Judkoff, Ronald D. (Golden, CO); Blake, Daniel M. (Golden, CO); Vinzant, Todd B. (Golden, CO); Ryan, Joseph P. (Golden, CO)

    2007-12-11T23:59:59.000Z

    A method, and systems for implementing such method, for purifying and conditioning air of weaponized contaminants. The method includes wetting a filter packing media with a salt-based liquid desiccant, such as water with a high concentration of lithium chloride. Air is passed through the wetted filter packing media and the contaminants in are captured with the liquid desiccant while the liquid desiccant dehumidifies the air. The captured contaminants are then deactivated in the liquid desiccant, which may include heating the liquid desiccant. The liquid desiccant is regenerated by applying heat to the liquid desiccant and then removing moisture. The method includes repeating the wetting with the regenerated liquid desiccant which provides a regenerable filtering process that captures and deactivates contaminants on an ongoing basis while also conditioning the air. The method may include filtration effectiveness enhancement by electrostatic or inertial means.

  5. Methods of and apparatus for testing the integrity of filters

    DOE Patents [OSTI]

    Herman, R.L.

    1984-01-01T23:59:59.000Z

    A method of and apparatus for testing the integrity of individual filters or filter stages of a multistage filtering system including a diffuser permanently mounted upstream and/or downstream of the filter stage to be tested for generating pressure differentials to create sufficient turbulence for uniformly dispersing trace agent particles within the airstram upstream and downstream of such filter stage. Samples of the particel concentration are taken upstream and downstream of the filter stage for comparison to determine the extent of particle leakage past the filter stage.

  6. Method of and apparatus for testing the integrity of filters

    DOE Patents [OSTI]

    Herman, R.L.

    1985-05-07T23:59:59.000Z

    A method of and apparatus are disclosed for testing the integrity of individual filters or filter stages of a multistage filtering system including a diffuser permanently mounted upstream and/or downstream of the filter stage to be tested for generating pressure differentials to create sufficient turbulence for uniformly dispersing trace agent particles within the airstream upstream and downstream of such filter stage. Samples of the particle concentration are taken upstream and downstream of the filter stage for comparison to determine the extent of particle leakage past the filter stage. 5 figs.

  7. Optimally Robust Kalman Filtering at Work: AO-, IO-, and Simultaneously IO-and AO-Robust Filters

    E-Print Network [OSTI]

    Ruckdeschel, Peter

    Optimally Robust Kalman Filtering at Work: AO-, IO-, and Simultaneously IO- and AO- Robust Filters Abstract We take up optimality results for robust Kalman filtering from Ruckdeschel (2001, 2010) where. (2006), Fried et al. (2007). Keywords: robustness, Kalman Filter, innovation outlier, additive outlier

  8. Preliminary study of an angiographic and angio-tomographic technique based on K-edge filters

    SciTech Connect (OSTI)

    Golosio, Bruno; Brunetti, Antonio [Dipartimento POLCOMING, Istituto di Matematica e Fisica, Università di Sassari, 07100 Sassari (Italy) [Dipartimento POLCOMING, Istituto di Matematica e Fisica, Università di Sassari, 07100 Sassari (Italy); Istituto Nazionale di Fisica Nucleare, Sezione di Cagliari (Italy); Oliva, Piernicola; Carpinelli, Massimo [Dipartimento di Chimica e Farmacia, Università di Sassari, 07100 Sassari (Italy) [Dipartimento di Chimica e Farmacia, Università di Sassari, 07100 Sassari (Italy); Istituto Nazionale di Fisica Nucleare, Sezione di Cagliari (Italy); Luca Masala, Giovanni [Dipartimento di Chimica e Farmacia, Università di Sassari, 07100 Sassari (Italy)] [Dipartimento di Chimica e Farmacia, Università di Sassari, 07100 Sassari (Italy); Meloni, Francesco [Unità operativa di Diagnostica per immagini Asl n. 1, Ospedale Civile SS Annunziata, 07100 Sassari (Italy)] [Unità operativa di Diagnostica per immagini Asl n. 1, Ospedale Civile SS Annunziata, 07100 Sassari (Italy); Battista Meloni, Giovanni [Istituto di Scienze Radiologiche, Università di Sassari, 07100 Sassari (Italy)] [Istituto di Scienze Radiologiche, Università di Sassari, 07100 Sassari (Italy)

    2013-08-14T23:59:59.000Z

    Digital Subtraction Angiography is commonly affected by artifacts due to the patient movements during the acquisition of the images without and with the contrast medium. This paper presents a preliminary study on an angiographic and angio-tomographic technique based on the quasi-simultaneous acquisition of two images, obtained using two different filters at the exit of an X-ray tube. One of the two filters (K-edge filter) contains the same chemical element used as a contrast agent (gadolinium in this study). This filter absorbs more radiation with energy just above the so called K-edge energy of gadolinium than the radiation with energy just below it. The other filter (an aluminium filter in this study) is simply used to suppress the low-energy contribution to the spectrum. Using proper calibration curves, the two images are combined to obtain an image of the contrast agent distribution. In the angio-tomographic application of the proposed technique two images, corresponding to the two filter types, are acquired for each viewing angle of the tomographic scan. From the two tomographic reconstructions, it is possible to obtain a three-dimensional map of the contrast agent distribution. The technique was tested on a sample consisting of a rat skull placed inside a container filled with water. Six small cylinders with 4.7 mm internal diameter containing the contrast medium at different concentrations were placed inside the skull. In the plain angiographic application of the technique, five out of six cylinders were visible, with gadolinium concentration down to 0.96%. In the angio-tomographic application, all six cylinders were visible, with gadolinium concentration down to 0.49%. This preliminary study shows that the proposed technique can provide images of the contrast medium at low concentration without most of the artifacts that are present in images produced by conventional techniques. The results encourage further investigation on the feasibility of a clinical implementation of the technique.

  9. Hydrocarbon-enhanced particulate filter regeneration via microwave ignition

    DOE Patents [OSTI]

    Gonze, Eugene V. (Pinckney, MI); Brown, David B. (Brighton, MI)

    2010-02-02T23:59:59.000Z

    A regeneration method for a particulate filter includes estimating a quantity of particulate matter trapped within the particulate filter, comparing the quantity of particulate matter to a predetermined quantity, heating at least a portion of the particulate filter to a combustion temperature of the particulate matter, and introducing hydrocarbon fuel to the particulate filter. The hydrocarbon fuel facilitates combustion of the particulate matter to regenerate the particulate filter.

  10. Carbon fiber composite molecular sieve electrically regenerable air filter media

    DOE Patents [OSTI]

    Wilson, K.A.; Burchell, T.D.; Judkins, R.R.

    1998-10-27T23:59:59.000Z

    An electrically regenerable gas filter system includes a carbon fiber composite molecular sieve (CFCMS) filter medium. After a separate medium-efficiency pre-filter removes particulate from the supply air stream, the CFCMS filter sorbs gaseous air pollutants before the air is recirculated to the space. When saturated, the CFCMS media is regenerated utilizing a low-voltage current that is caused to pass through the filter medium. 3 figs.

  11. Removable, hermetically-sealing, filter attachment system for hostile environments

    DOE Patents [OSTI]

    Mayfield, Glenn L [Richland, WA

    1983-01-01T23:59:59.000Z

    A removable and reusable filter attachment system. A filter medium is fixed o, and surrounded by, a filter frame having a coaxial, longitudinally extending, annular rim. The rim engages an annular groove which surrounds the opening of a filter housing. The annular groove contains a fusible material and a heating mechanism for melting the fusible material. Upon resolidifying, the fusible material forms a hermetic bond with the rim and groove. Remelting allows detachment and replacement of the filter frame.

  12. Moving Granular Bed Filter Development Program

    SciTech Connect (OSTI)

    Wilson, K.B.; Haas, J.C. [Combustion Power Co., San Mateo, CA (United States); Gupta, R.P.; Turk, B.S. [Research Triangle Inst., Research Triangle Park, NC (United States)

    1996-12-31T23:59:59.000Z

    For coal-fired power plants utilizing a gas turbine, the removal of ash particles is necessary to protect the turbine and to meet emission standards. Advantages are also evident for a filter system that can remove other coal-derived contaminants such as alkali, halogens, and ammonia. With most particulates and other contaminants removed, erosion and corrosion of turbine materials, as well as deposition of particles within the turbine, are reduced to acceptable levels. The granular bed filter is suitable for this task in a pressurized gasification or combustion environment. The objective of the base contract was to develop conceptual designs of moving granular bed filter (GBF) and ceramic candle filter technologies for control of particles from integrated gasification combined cycle (IGCC), pressurized fluidized-bed combustion (PFBC), and direct coal-fueled turbine (DCFT) systems. The results of this study showed that the GBF design compared favorably with the candle filter. Three program options followed the base contract. The objective of Option I, Component Testing, was to identify and resolve technical issues regarding GBF development for IGCC and PFBC environments. This program was recently completed. The objective of Option II, Filter Proof Tests, is to test and evaluate the moving GBF system at a government-furnished hot-gas cleanup test facility. This facility is located at Southern Company Services (SCS), Inc., Wilsonville, Alabama. The objective of Option III, Multicontaminant Control Using a GBF, is to develop a chemically reactive filter material that will remove particulates plus one or more of the following coal-derived contaminants: alkali, halogens, and ammonia.

  13. Biological Sampling and Analysis in Sinclair and Dyes Inlets, Washington: Chemical Analyses for 2007 Puget Sound Biota Study

    SciTech Connect (OSTI)

    Brandenberger, Jill M.; Suslick, Carolynn R.; Johnston, Robert K.

    2008-10-09T23:59:59.000Z

    Evaluating spatial and temporal trends in contaminant residues in Puget Sound fish and macroinvertebrates are the objectives of the Puget Sound Ambient Monitoring Program (PSAMP). In a cooperative effort between the ENVironmental inVESTment group (ENVVEST) and Washington State Department of Fish and Wildlife, additional biota samples were collected during the 2007 PSAMP biota survey and analyzed for chemical residues and stable isotopes of carbon (?13C) and nitrogen (?15N). Approximately three specimens of each species collected from Sinclair Inlet, Georgia Basin, and reference locations in Puget Sound were selected for whole body chemical analysis. The muscle tissue of specimens selected for chemical analyses were also analyzed for ?13C and ?15N to provide information on relative trophic level and food sources. This data report summarizes the chemical residues for the 2007 PSAMP fish and macro-invertebrate samples. In addition, six Spiny Dogfish (Squalus acanthias) samples were necropsied to evaluate chemical residue of various parts of the fish (digestive tract, liver, embryo, muscle tissue), as well as, a weight proportional whole body composite (WBWC). Whole organisms were homogenized and analyzed for silver, arsenic, cadmium, chromium, copper, nickel, lead, zinc, mercury, 19 polychlorinated biphenyl (PCB) congeners, PCB homologues, percent moisture, percent lipids, ?13C, and ?15N.

  14. Heat pump water heater and storage tank assembly

    DOE Patents [OSTI]

    Dieckmann, John T. (Belmont, MA); Nowicki, Brian J. (Watertown, MA); Teagan, W. Peter (Acton, MA); Zogg, Robert (Belmont, MA)

    1999-09-07T23:59:59.000Z

    A water heater and storage tank assembly comprises a housing defining a chamber, an inlet for admitting cold water to the chamber, and an outlet for permitting flow of hot water from the chamber. A compressor is mounted on the housing and is removed from the chamber. A condenser comprises a tube adapted to receive refrigerant from the compressor, and winding around the chamber to impart heat to water in the chamber. An evaporator is mounted on the housing and removed from the chamber, the evaporator being adapted to receive refrigerant from the condenser and to discharge refrigerant to conduits in communication with the compressor. An electric resistance element extends into the chamber, and a thermostat is disposed in the chamber and is operative to sense water temperature and to actuate the resistance element upon the water temperature dropping to a selected level. The assembly includes a first connection at an external end of the inlet, a second connection at an external end of the outlet, and a third connection for connecting the resistance element, compressor and evaporator to an electrical power source.

  15. Recovery of Water from Boiler Flue Gas

    SciTech Connect (OSTI)

    Edward Levy; Harun Bilirgen; Kwangkook Jeong; Michael Kessen; Christopher Samuelson; Christopher Whitcombe

    2008-09-30T23:59:59.000Z

    This project dealt with use of condensing heat exchangers to recover water vapor from flue gas at coal-fired power plants. Pilot-scale heat transfer tests were performed to determine the relationship between flue gas moisture concentration, heat exchanger design and operating conditions, and water vapor condensation rate. The tests also determined the extent to which the condensation processes for water and acid vapors in flue gas can be made to occur separately in different heat transfer sections. The results showed flue gas water vapor condensed in the low temperature region of the heat exchanger system, with water capture efficiencies depending strongly on flue gas moisture content, cooling water inlet temperature, heat exchanger design and flue gas and cooling water flow rates. Sulfuric acid vapor condensed in both the high temperature and low temperature regions of the heat transfer apparatus, while hydrochloric and nitric acid vapors condensed with the water vapor in the low temperature region. Measurements made of flue gas mercury concentrations upstream and downstream of the heat exchangers showed a significant reduction in flue gas mercury concentration within the heat exchangers. A theoretical heat and mass transfer model was developed for predicting rates of heat transfer and water vapor condensation and comparisons were made with pilot scale measurements. Analyses were also carried out to estimate how much flue gas moisture it would be practical to recover from boiler flue gas and the magnitude of the heat rate improvements which could be made by recovering sensible and latent heat from flue gas.

  16. Evaluation of microporous carbon filters as catalysts for ozone decomposition

    SciTech Connect (OSTI)

    Whinnery, L.; Coutts, D.; Shen, C.; Adams, R. [Sandia National Labs., Livermore, CA (United States); Quintana, C.; Showalter, S. [Sandia National Labs., Albuquerque, NM (United States)

    1994-12-31T23:59:59.000Z

    Ozone is produced in small quantities in photocopiers and laser printers in the workplace and large quantities in industrial waste water treatment facilities. Carbon filters are commonly used to decompose this unwanted ozone. The three most important factors in producing a filter for this purpose are flow properties, efficiency, and cost. Most ozone decomposition applications require very low back-pressure at modest flow rates. The tradeoff between the number of pores and the size of the pores will be discussed. Typical unfiltered emissions in the workplace are approximately 1 ppm. The maximum permissible exposure limit, PEL, for worker exposure to ozone is 0.1 ppm over 8 hours. Several methods have been examined to increase the efficiency of ozone decomposition. Carbon surfaces were modified with catalysts, the surface activated, and the surface area was increased, in attempts to decompose ozone more effectively. Methods to reduce both the processing and raw material costs were investigated. Several sources of microporous carbon were investigated as ozone decomposition catalysts. Cheaper processing routes including macropore templating, faster drying and extracting methods were also studied.

  17. Filter design for hybrid spin gates

    E-Print Network [OSTI]

    Andreas Albrecht; Martin B. Plenio

    2015-04-14T23:59:59.000Z

    The impact of control sequences on the environmental coupling of a quantum system can be described in terms of a filter. Here we analyze how the coherent evolution of two interacting spins subject to periodic control pulses, at the example of a nitrogen vacancy center coupled to a nuclear spin, can be described in the filter framework in both the weak and the strong coupling limit. A universal functional dependence around the filter resonances then allows for tuning the coupling type and strength. Originally limited to small rotation angles, we show how the validity range of the filter description can be extended to the long time limit by time-sliced evolution sequences. Based on that insight, the construction of tunable, noise decoupled, conditional gates composed of alternating pulse sequences is proposed. In particular such an approach can lead to a significant improvement in fidelity as compared to a strictly periodic control sequence. Moreover we analyze the decoherence impact, the relation to the filter for classical noise known from dynamical decoupling sequences, and we outline how an alternating sequence can improve spin sensing protocols.

  18. Secondary Pollutants from Ozone Reaction with Ventilation Filters and Degradation of Filter Media Additives

    SciTech Connect (OSTI)

    Destaillats, Hugo; Chen, Wenhao; Apte, Michael; Li, Nuan; Spears, Michael; Almosni, Jérémie; Brunner, Gregory; Zhang, Jianshun (Jensen); Fisk, William J.

    2011-05-01T23:59:59.000Z

    Prior research suggests that chemical processes taking place on the surface of particle filters employed in buildings may lead to the formation of harmful secondary byproducts. We investigated ozone reactions with fiberglass, polyester, cotton/polyester and polyolefin filter media, as well as hydrolysis of filter media additives. Studies were carried out on unused media, and on filters that were installed for 3 months in buildings at two different locations in the San Francisco Bay Area. Specimens from each filter media were exposed to {approx}150 ppbv ozone in a flow tube under a constant flow of dry or humidified air (50percent RH). Ozone breakthrough was recorded for each sample over periods of {approx}1000 min; the ozone uptake rate was calculated for an initial transient period and for steady-state conditions. While ozone uptake was observed in all cases, we did not observe significant differences in the uptake rate and capacity for the various types of filter media tested. Most experiments were performed at an airflow rate of 1.3 L/min (face velocity = 0.013 m/s), and a few tests were also run at higher rates (8 to 10 L/min). Formaldehyde and acetaldehyde, two oxidation byproducts, were quantified downstream of each sample. Those aldehydes (m/z 31 and 45) and other volatile byproducts (m/z 57, 59, 61 and 101) were also detected in real-time using Proton-Transfer Reaction - Mass Spectrometry (PTR-MS). Low-ppbv byproduct emissions were consistently higher under humidified air than under dry conditions, and were higher when the filters were loaded with particles, as compared with unused filters. No significant differences were observed when ozone reacted over various types of filter media. Fiberglass filters heavily coated with impaction oil (tackifier) showed higher formaldehyde emissions than other samples. Those emissions were particularly high in the case of used filters, and were observed even in the absence of ozone, suggesting that hydrolysis of additives, rather than ozonolysis, is the main formaldehyde source in those filters. Emission rates of formaldehyde and acetaldehyde were not found to be large enough to substantially increase indoor concentrations in typical building scenarios. Nevertheless, ozone reactions on HVAC filters cannot be ignored as a source of low levels of indoor irritants.

  19. Ceramic oxide composite hot gas filters

    SciTech Connect (OSTI)

    Wagner, R.A.; Weitzel, P. [Babcock and Wilcox, Lynchburg, VA (United States)

    1996-12-31T23:59:59.000Z

    This paper describes the development and testing of continuous fiber ceramic composites (CFCC) based hot gas filters. The work was divided into three primary tasks. In the first task, a preliminary set of compositions was fabricated in the form of open end tubes and characterized. The results of the first task were then used to identify the most promising compositions for sub-scale fabrication and testing. In addition to laboratory measurements of permeability and strength, exposure testing in a coal combustion environment was performed to assess the thermo-chemical stability of the CFCC materials. The results of this testing were used to down-select the filter composition for full-scale filter fabrication and testing in the third phase of the program.

  20. Hot gas filter and system assembly

    DOE Patents [OSTI]

    Lippert, T.E.; Palmer, K.M.; Bruck, G.J.; Alvin, M.A.; Smeltzer, E.E.; Bachovchin, D.M.

    1999-08-31T23:59:59.000Z

    A filter element is described for separating fine dirty particles from a hot gas. The filter element comprises a first porous wall and a second porous wall. Each porous wall has an outer surface and an inner surface. The first and second porous walls being coupled together thereby forming a substantially closed figure and open at one end. The open end is formed to be coupled to a hot gas clean up system support structure. The first and second porous walls define a channel beginning at the open end and terminate at the closed end through which a filtered clean gas can flow through and out into the clean gas side of a hot gas clean up system. 8 figs.

  1. Mathematical strategies for filtering complex systems: Regularly spaced sparse observations

    SciTech Connect (OSTI)

    Harlim, J. [Department of Mathematics and Center for Atmosphere and Ocean Science, Courant Institute of Mathematical Sciences, New York University, 251 Mercer Street, New York, NY 10012 (United States)], E-mail: jharlim@cims.nyu.edu; Majda, A.J. [Department of Mathematics and Center for Atmosphere and Ocean Science, Courant Institute of Mathematical Sciences, New York University, 251 Mercer Street, New York, NY 10012 (United States)

    2008-05-01T23:59:59.000Z

    Real time filtering of noisy turbulent signals through sparse observations on a regularly spaced mesh is a notoriously difficult and important prototype filtering problem. Simpler off-line test criteria are proposed here as guidelines for filter performance for these stiff multi-scale filtering problems in the context of linear stochastic partial differential equations with turbulent solutions. Filtering turbulent solutions of the stochastically forced dissipative advection equation through sparse observations is developed as a stringent test bed for filter performance with sparse regular observations. The standard ensemble transform Kalman filter (ETKF) has poor skill on the test bed and even suffers from filter divergence, surprisingly, at observable times with resonant mean forcing and a decaying energy spectrum in the partially observed signal. Systematic alternative filtering strategies are developed here including the Fourier Domain Kalman Filter (FDKF) and various reduced filters called Strongly Damped Approximate Filter (SDAF), Variance Strongly Damped Approximate Filter (VSDAF), and Reduced Fourier Domain Kalman Filter (RFDKF) which operate only on the primary Fourier modes associated with the sparse observation mesh while nevertheless, incorporating into the approximate filter various features of the interaction with the remaining modes. It is shown below that these much cheaper alternative filters have significant skill on the test bed of turbulent solutions which exceeds ETKF and in various regimes often exceeds FDKF, provided that the approximate filters are guided by the off-line test criteria. The skill of the various approximate filters depends on the energy spectrum of the turbulent signal and the observation time relative to the decorrelation time of the turbulence at a given spatial scale in a precise fashion elucidated here.

  2. METAL MEDIA FILTERS, AG-1 SECTION FI

    SciTech Connect (OSTI)

    Adamson, D.

    2012-05-23T23:59:59.000Z

    One application of metal media filters is in various nuclear air cleaning processes including applications for protecting workers, the public and the environment from hazardous and radioactive particles. To support this application the development of the ASME AG-1 FI Standard on Metal Media has been under way for more than ten years. Development of the proposed section has required resolving several difficult issues associated with operating conditions (media velocity, pressure drop, etc.), qualification testing, and quality acceptance testing. Performance characteristics of metal media are dramatically different than the glass fiber media with respect to parameters like differential pressures, operating temperatures, media strength, etc. These differences make existing data for a glass fiber media inadequate for qualifying a metal media filter for AG-1. In the past much work has been conducted on metal media filters at facilities such as Lawrence Livermore National Laboratory (LLNL) and Savannah River National Laboratory (SRNL) to qualify the media as High Efficiency Particulate Air (HEPA) Filters. Particle retention testing has been conducted at Oak Ridge Filter Test Facility and at Air Techniques International (ATI) to prove that the metal media meets or exceeds the 99.97% particle retention required for a HEPA Filter. Even with his testing, data was lacking to complete an AG-1 FI Standard on metal media. With funding secured by Mississippi State University (MSU) from National Nuclear Security Administration (NNSA), a research test stand is being designed and fabricated at MSU's Institute for Clean Energy Technology (ICET) Facility to obtain qualification data on metal media. This in turn will support required data needed for the FI Standard. The paper will discuss in detail how the test stand at MSU will obtain the necessary data to complete the FI Standard.

  3. Experimental noise filtering by quantum control

    E-Print Network [OSTI]

    A. Soare; H. Ball; D. Hayes; J. Sastrawan; M. C. Jarratt; J. J. McLoughlin; X. Zhen; T. J. Green; M. J. Biercuk

    2014-07-05T23:59:59.000Z

    Instabilities due to extrinsic interference are routinely faced in systems engineering, and a common solution is to rely on a broad class of $\\textit{filtering}$ techniques in order to afford stability to intrinsically unstable systems. For instance, electronic systems are frequently designed to incorporate electrical filters composed of, $\\textit{e.g.}$ RLC components, in order to suppress the effects of out-of-band fluctuations that interfere with desired performance. Quantum coherent systems are now moving to a level of complexity where challenges associated with realistic time-dependent noise are coming to the fore. Unfortunately, standard control solutions involving feedback are generally impossible due to the strictures of quantum mechanics, and existing error-suppressing gate constructions generally rely on unphysical bang-bang controls or quasi-static error models that do not reflect realistic laboratory environments. In this work we use the theory of quantum control engineering and experiments with trapped $^{171}$Yb$^{+}$ ions to demonstrate the construction of novel $\\textit{noise filters}$ which are specifically designed to mitigate the effect of realistic time-dependent fluctuations on qubits \\emph{during useful operations}. Starting with desired filter characteristics and the Walsh basis functions, we use a combination of analytic design rules and numeric search to construct time-domain noise filters tailored to a desired state transformation. Our results validate the generalized filter-transfer function framework for arbitrary quantum control operations, and demonstrate that it can be leveraged as an effective and efficient tool for developing novel robust control protocols.

  4. Efficient Quantum Filtering for Quantum Feedback Control

    E-Print Network [OSTI]

    Pierre Rouchon; Jason F. Ralph

    2015-01-06T23:59:59.000Z

    We discuss an efficient numerical scheme for the recursive filtering of diffusive quantum stochastic master equations. We show that the resultant quantum trajectory is robust and may be used for feedback based on inefficient measurements. The proposed numerical scheme is amenable to approximation, which can be used to further reduce the computational burden associated with calculating quantum trajectories and may allow real-time quantum filtering. We provide a two-qubit example where feedback control of entanglement may be within the scope of current experimental systems.

  5. Electrically heated particulate filter using catalyst striping

    DOE Patents [OSTI]

    Gonze, Eugene V; Paratore, Jr., Michael J; Ament, Frank

    2013-07-16T23:59:59.000Z

    An exhaust system that processes exhaust generated by an engine is provided. The system generally includes a particulate filter (PF) that filters particulates from the exhaust wherein an upstream end of the PF receives exhaust from the engine. A grid of electrically resistive material is applied to an exterior upstream surface of the PF and selectively heats exhaust passing through the grid to initiate combustion of particulates within the PF. A catalyst coating is applied to the PF that increases a temperature of the combustion of the particulates within the PF.

  6. Plasma filtering techniques for nuclear waste remediation

    E-Print Network [OSTI]

    Gueroult, Renaud; Fisch, Nathaniel J

    2015-01-01T23:59:59.000Z

    Nuclear waste cleanup is challenged by the handling of feed stocks that are both unknown and complex. Plasma filtering, operating on dissociated elements, offers advantages over chemical methods in processing such wastes. The costs incurred by plasma mass filtering for nuclear waste pretreatment, before ultimate disposal, are similar to those for chemical pretreatment. However, significant savings might be achieved in minimizing the waste mass. This advantage may be realized over a large range of chemical waste compositions, thereby addressing the heterogeneity of legacy nuclear waste.

  7. ADVANCED SECOND GENERATION CERAMIC CANDLE FILTERS

    SciTech Connect (OSTI)

    M.A. Alvin

    2002-01-31T23:59:59.000Z

    Through sponsorship from the Department of Energy's National Energy Technology Laboratory (DOE/NETL), development and manufacture of advanced second generation candle filters was undertaken in the early 1990's. Efforts were primarily focused on the manufacture of fracture toughened, 1.5 m, continuous fiber ceramic composite (CFCC) and filament wound candle filters by 3M, McDermott, DuPont Lanxide Composites, and Techniweave. In order to demonstrate long-term thermal, chemical, and mechanical stability of the advanced second generation candle filter materials, Siemens Westinghouse initiated high temperature, bench-scale, corrosion testing of 3M's CVI-SiC and DuPont's PRD-66 mini-candles, and DuPont's CFCC SiC-SiC and IF&P Fibrosic{sup TM} coupons under simulated, pressurized fluidized-bed combustion (PFBC) conditions. This effort was followed by an evaluation of the mechanical and filtration performance of the advanced second generation filter elements in Siemens Westinghouse's bench-scale PFBC test facility in Pittsburgh, Pennsylvania. Arrays of 1.4-1.5 m 3M CVI-SiC, DuPont PRD-66, DuPont SiC-SiC, and IF&P Fibrosic{sup TM} candles were subjected to steady state process operating conditions, increased severity thermal transients, and accelerated pulse cycling test campaigns which represented {approx}1760 hours of equivalent filter operating life. Siemens Westinghouse subsequently participated in early material surveillance programs which marked entry of the 3M CVI-SiC and DuPont PRD-66 candle filters in Siemens Westinghouse Advanced Particulate Filtration (APF) system at the American Electric Power (AEP) Tidd Demonstration Plant in Brilliant, Ohio. Siemens Westinghouse then conducted an extended, accelerated life, qualification program, evaluating the performance of the 3M, McDermott, and Techniweave oxide-based CFCC filter elements, modified DuPont PRD-66 elements, and the Blasch, Scapa Cerafil{sup TM}, and Specific Surface monolithic candles for use in the APF system at the Foster Wheeler pressurized circulating fluidized-bed combustion (PCFBC), pilot-scale, test facility in Karhula, Finland. This report presents a summary of these efforts, defining the stability of the various porous ceramic filter materials, as well as component performance and extended life for use in advanced coal-based power systems.

  8. Electrically heated particulate filter enhanced ignition strategy

    SciTech Connect (OSTI)

    Gonze, Eugene V; Paratore, Jr., Michael J

    2012-10-23T23:59:59.000Z

    An exhaust system that processes exhaust generated by an engine is provided. The system generally includes a particulate filter (PF) that filters particulates from the exhaust wherein an upstream end of the PF receives exhaust from the engine. A grid of electrically resistive material is applied to an exterior upstream surface of the PF and selectively heats exhaust passing through the grid to initiate combustion of particulates within the PF. A catalyst coating applied to at least one of the PF and the grid. A control module estimates a temperature of the grid and controls the engine to produce a desired exhaust product to increase the temperature of the grid.

  9. In situ PEM fuel cell water measurements

    SciTech Connect (OSTI)

    Borup, Rodney L [Los Alamos National Laboratory; Mukundan, Rangachary [Los Alamos National Laboratory; Davey, John R [Los Alamos National Laboratory; Spendelow, Jacob S [Los Alamos National Laboratory; Hussey, Daniel S [NIST; Jacobson, David L [NIST; Arif, Muhammad [NIST

    2009-01-01T23:59:59.000Z

    Efficient PEM (Polymer Electrolyte Membrane) fuel cell performance requires effective water management. To achieve a deeper understanding of water transport and performance issues associated with water management, we have conducted in situ water examinations to help understand the effects of components and operations. High Frequency Resistance (HFR), AC Impedance and Neutron imaging were used to measure water content in operating fuel cells, with various conditions, including current density, relative humidity, inlet flows, flow orientation and variable Gas Diffusion Layer (GDL) properties. High resolution neutron radiography was used to image fuel cells during a variety of conditions. The effect of specific operating conditions, including flow direction (co-flow or counter-flow) was examined. Counter-flow operation was found to result in higher water content than co-flow operation, which correlates to lower membrane resistivity. A variety of cells were used to quantify the membrane water in situ during exposure to saturated gases, during fuel cell operation, and during hydrogen pump operation. The quantitative results show lower membrane water content than previous results suggested.

  10. Trichloroethene Removal From Waste Gases in Anaerobic Biotrickling Filters Through Reductive Dechlorination

    E-Print Network [OSTI]

    Popat, Sudeep Chandrakant

    2010-01-01T23:59:59.000Z

    existing chemical scrubbers to biotrickling filters for H2Sexisting chemical scrubbers to biotrickling filters for H2San industrial chemical scrubber into a biotrickling filter:

  11. Investigation of IAQ-Relevant Surface Chemistry and Emissions on HVAC Filter Materials

    E-Print Network [OSTI]

    Destaillats, Hugo

    2010-01-01T23:59:59.000Z

    VOCs emitted by reactions of HVAC filters with ozone usingChemistry and Emissions on HVAC Filter Materials HugoChemistry and Emissions on HVAC Filter Materials Authors:

  12. Laboratory measurement of secondary pollutant yields from ozone reaction with HVAC filters.

    E-Print Network [OSTI]

    Destaillats, Hugo

    2012-01-01T23:59:59.000Z

    from Ozone Reaction with HVAC Filters Hugo Destaillats,from Ozone Reaction with HVAC Filters Hugo Destaillatsfrom Ozone Reaction with HVAC Filters Hugo Destaillats

  13. From near-surface to root-zone soil moisture using an exponential filter: an assessment of the method based on

    E-Print Network [OSTI]

    Boyer, Edmond

    provides a means to quantitatively describe the water content of a shallow near-surface soil layer, wg of the method based on in-situ observations and model simulations C. Albergel1 , C. Rüdiger1,* , T. Pellarin2. A recursive exponential filter equation using a time constant, T, is used to compute a soil water index

  14. Application of Pulsed Electrical Fields for Advanced Cooling and Water Recovery in Coal-Fired Power Plant

    SciTech Connect (OSTI)

    Young Cho; Alexander Fridman

    2009-04-02T23:59:59.000Z

    The overall objective of the present work was to develop technologies to reduce freshwater consumption in a cooling tower of coal-based power plant so that one could significantly reduce the need of make-up water. The specific goal was to develop a scale prevention technology based an integrated system of physical water treatment (PWT) and a novel filtration method so that one could reduce the need for the water blowdown, which accounts approximately 30% of water loss in a cooling tower. The present study investigated if a pulsed spark discharge in water could be used to remove deposits from the filter membrane. The test setup included a circulating water loop and a pulsed power system. The present experiments used artificially hardened water with hardness of 1,000 mg/L of CaCO{sub 3} made from a mixture of calcium chloride (CaCl{sub 2}) and sodium carbonate (Na{sub 2}CO{sub 3}) in order to produce calcium carbonate deposits on the filter membrane. Spark discharge in water was found to produce strong shockwaves in water, and the efficiency of the spark discharge in cleaning filter surface was evaluated by measuring the pressure drop across the filter over time. Results showed that the pressure drop could be reduced to the value corresponding to the initial clean state and after that the filter could be maintained at the initial state almost indefinitely, confirming the validity of the present concept of pulsed spark discharge in water to clean dirty filter. The present study also investigated the effect of a plasma-assisted self-cleaning filter on the performance of physical water treatment (PWT) solenoid coil for the mitigation of mineral fouling in a concentric counterflow heat exchanger. The self-cleaning filter utilized shockwaves produced by pulse-spark discharges in water to continuously remove scale deposits from the surface of the filter, thus keeping the pressure drop across the filter at a relatively low value. Artificial hard water was used in the present fouling experiments for three different cases: no treatment, PWT coil only, and PWT coil plus self-cleaning filter. Fouling resistances decreased by 59-72% for the combined case of PWT coil plus filter compared with the values for no-treatment cases. SEM photographs showed much smaller particle sizes for the combined case of PWT coil plus filter as larger particles were continuously removed from circulating water by the filter. The x-ray diffraction data showed calcite crystal structures for all three cases.

  15. Technical and economical analysis of the conversion of a full-scale scrubber to a biotrickling filter for odor control

    E-Print Network [OSTI]

    Technical and economical analysis of the conversion of a full-scale scrubber to a biotrickling feasibility of converting wet chemical scrubbers to biotrickling filters for H2S control at the Orange County chemicals, energy and water usage compared to a chemical scrubber operated in parallel to the biotrickling

  16. Friction Factor Measurement, Analysis, and Modeling for Flat-Plates with 12.15 mm Diameter Hole-Pattern, Tested with Air at Different Clearances, Inlet Pressures, and Pressure Ratios

    E-Print Network [OSTI]

    Deva Asirvatham, Thanesh

    2011-02-22T23:59:59.000Z

    of 800, 1000, and 1200 psi respectively). These nine combinations of clearance and inlet pressure will give a range of friction factor. The following objectives are considered. 17 Figure 10. Detailed view of a 3.175 mm diameter hole...

  17. Micromechanical optical filters for spectrometry Hakon Sagberg

    E-Print Network [OSTI]

    Johansen, Tom Henning

    This thesis presents a study of optical filters that are fabricated as micro-electro- mechanical systems (MEMS. Experiments show that sensitive microphones can be made with this technology. The thesis consists partner. He has posed critical questions and saved me from spending too much time in blind alleys

  18. KALMAN FILTERING WITH STATISTICAL STATE CONSTRAINTS

    E-Print Network [OSTI]

    Simon, Dan

    KALMAN FILTERING WITH STATISTICAL STATE CONSTRAINTS T. L. Chia ControlSoft Inc. 5387 Avion Park with white process and measurement noise, the Kalman ¯lter is known to be the minimum variance linear state estimator. In the case that the random quantities are Gaussian, then the Kalman ¯lter is the minimim

  19. Nitride-bonded silicon carbide composite filter

    SciTech Connect (OSTI)

    Thomson, B.N.; DiPietro, S.G.

    1995-12-01T23:59:59.000Z

    The objective of this program is to develop and demonstrate an advanced hot gas filter, using ceramic component technology, with enhanced durability to provide increased resistance to thermal fatigue and crack propagation. The material is silicon carbide fiber reinforced nitride bonded silicon carbide.

  20. Abductive reasoning through Filtering Chitta Baral

    E-Print Network [OSTI]

    Baral, Chitta

    Abductive reasoning through Filtering Chitta Baral Department of Computer Science and Engg. Arizona State University Tempe, AZ, 85287, USA chitta@asu.edu Abstract Abduction is an inference mechanism where to as abductive reasoning. Given a theory and some observations, by fil­ tering the theory with the observations

  1. A SPEECHENHANCEMENT METHOD BASEDON KALMAN FILTERING

    E-Print Network [OSTI]

    and intelligibility of speech. In automatic speech and speaker recognition systems if a speech enhancement scheme.Speechenhancementalsoplays animportantroleinspeechcoding applications. The problem addressed in the present paper i s to enhance speech when only proposed a nonstationary Wiener filterirlg method for speech enhancement, where the Wiener filter

  2. Efficiently Filtering RFID Data Streams Yijian Bai

    E-Print Network [OSTI]

    Lee, Dongwon

    @cs.ucla.edu Siemens Corporate Research {fusheng.wang,peiya.liu}@siemens.com Abstract RFID holds the promise of real, filtered, and transformed into semantic application data. RFID data, however, contains false readings tracking, smart *Work done while visiting Siemens Corporate Research. Permission to make digital or hard

  3. Adaptive Filtering of Multilingual Document Streams

    E-Print Network [OSTI]

    Oard, Doug

    the volume of new documents that must be examined by the user to manageable levels. This paper presents three techniques for extending adaptive monolingual text ltering techniques to manage multilingual document streamsAdaptive Filtering of Multilingual Document Streams Douglas W. Oard College of Library

  4. Composite filter aids for cleanup of additives

    SciTech Connect (OSTI)

    Rudenko, L.I.; Sklyar, V.Y.

    1984-03-01T23:59:59.000Z

    This article examines the properties of composite filter aids in additive cleanup using two- and three-component filter aid composites based on perlite, kieselguhr, diatomite, asbestos, and wood flour. Filtration tests were run on naphtha solutions of the additive zinc dialkyldithiophosphate. The laboratory studies indicate that composites of perlite and kieselguhr with fibrous materials (wood flour or asbestos) show great promise for the removal of solid contaminants from the zinc disalkydithiophosphate additive. The advantages of the filter aid composite based on perlite, kieselguhr, and wood flour in comparison with the two-component composites are the higher filtration rate (by 26%) and the smaller losses of additive (by a factor of 2.1) and isobutyl alcohol (by a factor of 1.6). It is demonstrated that the filtration rate with the three components is 50-60% higher than with the composite of perlite with kieselguhr. The filtration of the zinc dialkyldithiophosphate additive using the composite filter aid based on perlite, kieselguhr, and wood flour, has been adopted at the Volgograd Petroleum Refinery. Includes 2 tables.

  5. A fabrication method for integrated filter elements with inductance cancellation

    E-Print Network [OSTI]

    Perreault, David J.

    This paper outlines a fabrication method for integrated filter elements. An integrated filter element is a three- (or more) terminal device comprising a capacitor and coupled air-core magnetic windings, in which the magnetic ...

  6. Ozone Removal by Filters Containing Activated Carbon: A Pilot Study

    E-Print Network [OSTI]

    Fisk, William

    2012-01-01T23:59:59.000Z

    carbon filters for the control of ozone, sulfur dioxide, andMendell (2008). "Outdoor ozone and building-related symptomsAir filter materials, outdoor ozone and building-related

  7. Unscented Kalman Filters for Multiple Target Tracking with Symmetric Measurement

    E-Print Network [OSTI]

    Lanterman, Aaron

    1 Unscented Kalman Filters for Multiple Target Tracking with Symmetric Measurement Equations measurement equation approach to multiple target tracking is revisited using unscented Kalman and particle measurement equation implementation relying upon an extended Kalman filter. Counterintuitive results

  8. The discrete Kalman filtering approach for seismic signals deconvolution

    SciTech Connect (OSTI)

    Kurniadi, Rizal; Nurhandoko, Bagus Endar B. [Departement of Physics Intitut Teknologi Bandung, Jl. Ganesha 10 Bandung (Indonesia)

    2012-06-20T23:59:59.000Z

    Seismic signals are a convolution of reflectivity and seismic wavelet. One of the most important stages in seismic data processing is deconvolution process; the process of deconvolution is inverse filters based on Wiener filter theory. This theory is limited by certain modelling assumptions, which may not always valid. The discrete form of the Kalman filter is then used to generate an estimate of the reflectivity function. The main advantage of Kalman filtering is capability of technique to handling continually time varying models and has high resolution capabilities. In this work, we use discrete Kalman filter that it was combined with primitive deconvolution. Filtering process works on reflectivity function, hence the work flow of filtering is started with primitive deconvolution using inverse of wavelet. The seismic signals then are obtained by convoluting of filtered reflectivity function with energy waveform which is referred to as the seismic wavelet. The higher frequency of wavelet gives smaller wave length, the graphs of these results are presented.

  9. Distributed Kalman filtering compared to Fourier domain preconditioned conjugate gradient

    E-Print Network [OSTI]

    Greer, Julia R.

    Distributed Kalman filtering compared to Fourier domain preconditioned conjugate gradient for laser of the tomography problem. The second algorithm is the distributed Kalman filter (DKF) developed by Massioni et al

  10. adaptive information filtering: Topics by E-print Network

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

    1 12;1 Introduction Filter bank theory 1 is by now a mature topic Reilly, James P. 139 ANALYSIS OF THE ADAPTIVE MATCHED FILTER ALGORITHM FOR CASES WITH...

  11. adaptive notch filters: Topics by E-print Network

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

    1 12;1 Introduction Filter bank theory 1 is by now a mature topic Reilly, James P. 133 ANALYSIS OF THE ADAPTIVE MATCHED FILTER ALGORITHM FOR CASES WITH...

  12. adaptive filtering system: Topics by E-print Network

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

    1 12;1 Introduction Filter bank theory 1 is by now a mature topic Reilly, James P. 51 Study on Adaptive Kalman Filtering Algorithms in Human Movement Tracking...

  13. adaptive notch filter: Topics by E-print Network

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

    1 12;1 Introduction Filter bank theory 1 is by now a mature topic Reilly, James P. 133 ANALYSIS OF THE ADAPTIVE MATCHED FILTER ALGORITHM FOR CASES WITH...

  14. adaptive smoothing filter: Topics by E-print Network

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

    1 12;1 Introduction Filter bank theory 1 is by now a mature topic Reilly, James P. 162 ANALYSIS OF THE ADAPTIVE MATCHED FILTER ALGORITHM FOR CASES WITH...

  15. adaptive filtering techniques: Topics by E-print Network

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

    1 12;1 Introduction Filter bank theory 1 is by now a mature topic Reilly, James P. 147 ANALYSIS OF THE ADAPTIVE MATCHED FILTER ALGORITHM FOR CASES WITH...

  16. Design of discrete-time filters for efficient implementation

    E-Print Network [OSTI]

    Wei, Dennis

    2011-01-01T23:59:59.000Z

    The cost of implementation of discrete-time filters is often strongly dependent on the number of non-zero filter coefficients or the precision with which the coefficients are represented. This thesis addresses the design ...

  17. Diesel Particulate Filter Technology for Low-Temperature and...

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

    Filter Technology for Low-Temperature and Low-NOxPM Applications Diesel Particulate Filter Technology for Low-Temperature and Low-NOxPM Applications 2004 DEER Conference...

  18. Durability of Diesel Engine Particulate Filters CRADA No. ORNL...

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

    Filters CRADA No. ORNL-04-0692 with Cummins Inc. Durability of Diesel Engine Particulate Filters CRADA No. ORNL-04-0692 with Cummins Inc. Presentation from the U.S. DOE Office of...

  19. Partial-Flow Diesel Particulate Filter of Sintered Metal Fiber...

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

    Partial-Flow Diesel Particulate Filter of Sintered Metal Fiber Fleece Partial-Flow Diesel Particulate Filter of Sintered Metal Fiber Fleece Poster presented at the 16th Directions...

  20. OXYGEN TRANSFER IN TRICKLING FILTERS By BruceE. Logan~

    E-Print Network [OSTI]

    OXYGEN TRANSFER IN TRICKLING FILTERS By BruceE. Logan~ ABSTRACT: Insufficientoxygen transfer can result in anaerobic biofilmsand odor generation during biochemicaloxygen demand (BOD) removal plastic media trickling filters occurs by diffusion of oxygen through thin fluid films, previous models

  1. Novel rf mems tunable filters with adjustable spurious suppression 

    E-Print Network [OSTI]

    Sekar, Vikram

    2009-05-15T23:59:59.000Z

    This thesis presents the theory and design of fixed and Radio Frequency (RF) Microelectromechanical Systems (MEMS) -based tunable microwave filters for RF and microwave applications. The methodology for the design of coupled resonator filters...

  2. On-Site Wastewater Treatment Systems: Trickling Filter 

    E-Print Network [OSTI]

    Lesikar, Bruce J.

    2000-02-04T23:59:59.000Z

    A trickling filter is a bed of gravel or plastic media over which pretreated wastewater is sprayed. This publication explains how trickling filters treat wastewater and gives tips on how to maintain them....

  3. Novel rf mems tunable filters with adjustable spurious suppression

    E-Print Network [OSTI]

    Sekar, Vikram

    2009-05-15T23:59:59.000Z

    This thesis presents the theory and design of fixed and Radio Frequency (RF) Microelectromechanical Systems (MEMS) -based tunable microwave filters for RF and microwave applications. The methodology for the design of coupled resonator filters...

  4. On-Site Wastewater Treatment Systems: Trickling Filter

    E-Print Network [OSTI]

    Lesikar, Bruce J.

    2000-02-04T23:59:59.000Z

    A trickling filter is a bed of gravel or plastic media over which pretreated wastewater is sprayed. This publication explains how trickling filters treat wastewater and gives tips on how to maintain them....

  5. Water Quality

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

    Water Quality Water Quality We protect water quality through stormwater control measures and an extensive network of monitoring wells and stations encompassing groundwater, surface...

  6. Electrically heated particulate filter propagation support methods and systems

    DOE Patents [OSTI]

    Gonze, Eugene V [Pinckney, MI; Ament, Frank [Troy, MI

    2011-06-07T23:59:59.000Z

    A control system that controls regeneration of a particulate filter is provided. The system generally includes a regeneration module that controls current to the particulate filter to initiate combustion of particulate matter in the particulate filter. A propagation module estimates a propagation status of the combustion of the particulate matter based on a combustion temperature. A temperature adjustment module controls the combustion temperature by selectively increasing a temperature of exhaust that passes through the particulate filter.

  7. Deterministic Kalman Filtering on Semi-infinite Interval

    E-Print Network [OSTI]

    Leonid Faybusovich

    2011-10-28T23:59:59.000Z

    Oct 28, 2011 ... Abstract: We relate a deterministic Kalman filter on semi-infinite interval to linear-

  8. Results from tests of DuPont crossflow filter

    SciTech Connect (OSTI)

    Steimke, J.L.

    2000-05-05T23:59:59.000Z

    Crossflow filtration will be used to filter radioactive waste slurry as part of the Late Wash Process.

  9. Fundamental study on recovery uranium oxide from HEPA filters

    SciTech Connect (OSTI)

    Izumida, T. [Hitachi Ltd., Ibaraki (Japan). Hitachi Works; Matsumoto, H.; Tsuchiya, H.; Iba, H. [Hitachi Nuclear Engineering Co., Ltd., Ibaraki (Japan); Noguchi, Y. [Radioactive Waste Management Center, Tokyo (Japan)

    1993-12-31T23:59:59.000Z

    Large numbers of spent HEPA filters are produced at uranium fuel fabrication facilities. Uranium oxide particles have been collected on these filters. Then, a spent HEPA filter treatment system was developed from the viewpoint of recovering the UO{sub 2} and minimizing the volume. The system consists of a mechanical separation process and a chemical dissolution process. This paper describes the results of fundamental experiments on recovering UO{sub 2} from HEPA filters.

  10. Photometry Transformation from $RGB$ Bayer Filter System to Johnson-Cousins $BVR$ Filter System

    E-Print Network [OSTI]

    Park, Woojin; Shim, Hyunjin; Le, Huynh Anh N; Im, Myungshin; Chang, Seunghyuk; Yu, Joonkyu

    2015-01-01T23:59:59.000Z

    The $RGB$ Bayer filter system consists of mosaic $R$, $G$, and $B$ filters on the grid of photo sensors which typical commercial DSLR (Digital Single Lens Reflex) cameras and CCD cameras are equipped with. Many unique astronomical data obtained using a $RGB$ Bayer filter system are available, including transient objects, e.g., supernovae, variable stars, and solar system bodies. The utilization of such data in scientific research strongly requires reliable photometry transformation methods. In this work, we develop a series of equations to convert the observed magnitudes in the $RGB$ Bayer filter system ($R_B$, $G_B$, and $B_B$) into the Johnson-Cousins $BVR$ filter system ($B_J$, $V_J$, and $R_C$). The new transformation equations derive the calculated magnitudes in Johnson-Cousins filters ($B_{Jcal}$, $V_{Jcal}$, and $R_{Ccal}$) as functions of magnitudes and colors. The mean differences between the transformed magnitudes and original magnitudes, i.e., the residuals, are $\\Delta(B_J-B_{Jcal})$ = 0.104 mag, ...

  11. Biomass Control in Waste Air Biotrickling Filters by Protozoan Predation

    E-Print Network [OSTI]

    Biomass Control in Waste Air Biotrickling Filters by Protozoan Predation Huub H. J. Cox, Marc A as a means of biomass control. Wet biomass for- mation in 23.6-L reactors over a 77-day period was reduced from 13.875 kg in a control biotrickling filter to 11.795 kg in a biotrickling filter enriched

  12. Electrically heated particulate filter preparation methods and systems

    DOE Patents [OSTI]

    Gonze, Eugene V [Pinckney, MI

    2012-01-31T23:59:59.000Z

    A control system that controls regeneration of a particulate filter is provided. The system generally includes a fuel control module that controls injection of fuel into exhaust that passes through the particulate filter. A regeneration module controls current to the particulate filter to initiate regeneration after the fuel has been injected into the exhaust.

  13. SIGGRAPH 2001 An Introduction to the Kalman Filter

    E-Print Network [OSTI]

    Masci, Frank

    SIGGRAPH 2001 Course 8 An Introduction to the Kalman Filter Gary Bishop University of North://info.acm.org/pubs/toc/CRnotice.html #12;2 #12;Course 8--An Introduction to the Kalman Filter 1 TABLE OF CONTENTS TABLE OF CONTENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 4. The Kalman Filter

  14. An Adaptive Kalman Filter for Removing Baseline Wandering in ECG

    E-Print Network [OSTI]

    Povinelli, Richard J.

    An Adaptive Kalman Filter for Removing Baseline Wandering in ECG Signals MA Mneimneh, EE Yaz, MT to baseline removal. This paper proposes an adaptive Kalman filter for the real time re- moval of baseline is used with an adaptive Kalman filter to estimate the state variables, including the baseline wandering

  15. Kalman filtering algorithm for on-line memory polynomial predistortion

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Kalman filtering algorithm for on-line memory polynomial predistortion Mourad Djamai 1 , Smail. Kalman filtering algorithm with sliding time-window is adapted to track the changes in the PA predistortion, Kalman Filtering, parameter estimation, adaptive control. I. INTRODUCTION Nonlinear system

  16. Kalman Filter Constraint Switching for Turbofan Engine Health Estimation

    E-Print Network [OSTI]

    Simon, Dan

    Kalman Filter Constraint Switching for Turbofan Engine Health Estimation Dan Simon Cleveland State Cleveland, Ohio, 44135 Abstract Kalman filters are often used to estimate the state variables of a dynamic system. However, in the application of Kalman filters some known signal information is often either

  17. A Direct Kalman Filtering Approach for GPWINS Integration

    E-Print Network [OSTI]

    Moore, John Barratt

    A Direct Kalman Filtering Approach for GPWINS Honghui ence and Tel: Integration Honghui Qi, John B.edu.au Abstract: In this paper we present a direct Kalman filtering approach for GPS/INS integration. In the approach, GPS and INS non­linearities are preprocessed prior to a Kalman filter. The GPS preprocessed data

  18. DESIGNING A KALMAN FILTER WHEN NO NOISE COVARIANCE INFORMATION IS

    E-Print Network [OSTI]

    Van den Hof, Paul

    DESIGNING A KALMAN FILTER WHEN NO NOISE COVARIANCE INFORMATION IS AVAILABLE Robert Bos ,1 Xavier Kalman filters using first principles models is often that these models lack a description of the noises that affect the states and the measurements. In these cases, the Kalman filter has to be estimated from data

  19. Kalman filtering the delay-difference equation: practical approaches

    E-Print Network [OSTI]

    Kalman filtering the delay-difference equation: practical approaches and simulations Daniel K.-Recently, J. J. Pella showed how the Kalman filter could be applied to production modeling to esti- mate apply these methods to the Deriso-Schnute delay-difference equation. The Kalman filter approach

  20. A Constant Gain Kalman Filter Approach to track Maneuvering Targets

    E-Print Network [OSTI]

    Naik, Naren

    1 A Constant Gain Kalman Filter Approach to track Maneuvering Targets Ashwin Yadav1 , Peeyush domains. One of the most fundamental and widely used approaches to target tracking is the Kalman filter. In presence of unknown noise statistics there are difficulties in the Kalman filter yielding acceptable

  1. Kalman Filter in Real Time URBIS Date Jan 2010

    E-Print Network [OSTI]

    Vuik, Kees

    2010-0000 Kalman Filter in Real Time URBIS Date Jan 2010 Author(s) R. Kranenburg Projectnumber . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 4 Kalman Filter 14 4.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 4.2 Algorithm of Kalman Filtering . . . . . . . . . . . . . . . . . . . . 14 4.3 Sensitivity Tests

  2. An ensemble Kalman-Bucy filter for continuous data assimilation

    E-Print Network [OSTI]

    Reich, Sebastian

    An ensemble Kalman-Bucy filter for continuous data assimilation Kay Bergemann and Sebastian Reich@uni-potsdam.de #12;Abstract1 The ensemble Kalman filter has emerged as a promising filter algorithm for nonlinear2 differential equations subject to intermittent observations. In this paper, we extend the well-3 known Kalman

  3. Extended Kalman Filter Using a Kernel Recursive Least Squares Observer

    E-Print Network [OSTI]

    Slatton, Clint

    Extended Kalman Filter Using a Kernel Recursive Least Squares Observer Pingping Zhu, Badong Chen estimation problem combining the extended Kalman filter (EKF) with a kernel recursive least squares (KRLS Kalman filter, EKF and KRLS algorithms. Results demonstrate that the performance of the EKF

  4. Regelsysteme 1 10. Tutorial LQ Regulator und Kalman Filter

    E-Print Network [OSTI]

    Lygeros, John

    Regelsysteme 1 10. Tutorial LQ Regulator und Kalman Filter Dave Ochsenbein Institut f¨ur Automatik ETH Z¨urich HS 2013 Dave Ochsenbein Regelsysteme 1 HS 2013 #12;10. Tutorial LQ Regulator und Kalman Filter Gliederung 10.1. Varia 10.2. LQ-Regulator 10.3. Kalman-Bucy Filter 10.4. Eigenschaften des

  5. SUBBAND KALMAN FILTERING WITH APPLICATIONS TO TARGET TRACKING

    E-Print Network [OSTI]

    De Leon, Phillip

    SUBBAND KALMAN FILTERING WITH APPLICATIONS TO TARGET TRACKING P. De Leon1 , W. Kober2 , K, USA ABSTRACT The Kalman filter has been successfully applied to target tracking. However, the Kalman is large. Furthermore, noisy measurements may decrease Kalman filter tracking accuracy. One way to possibly

  6. Enhancements to RSS Based Indoor Tracking Systems Using Kalman Filters

    E-Print Network [OSTI]

    Enhancements to RSS Based Indoor Tracking Systems Using Kalman Filters I. Guvenc EECE Department of a location system over the deployed network, and the application of a Kalman filtering algorithm to enhance a Kalman filter algorithm are then presented. General Terms Algorithms, Measurement, Experimentation

  7. KALMAN FILTER WITH PHASE SPECTRUM COMPENSATION ALGORITHM FOR SPEECH ENHANCEMENT

    E-Print Network [OSTI]

    KALMAN FILTER WITH PHASE SPECTRUM COMPENSATION ALGORITHM FOR SPEECH ENHANCEMENT Stephen So, Kamil K.lyons, a.stark, k.paliwal}@griffith.edu.au ABSTRACT In this paper, we propose to combine the Kalman filter specifically, we apply the PSC tech- nique to initialise the Kalman filter, whereby PSC is used to clean

  8. Dynamic Neural Field Optimization using the Unscented Kalman Filter

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Dynamic Neural Field Optimization using the Unscented Kalman Filter Jeremy Fix, Matthieu Geist Kalman filters, a derivative-free algorithm for parameter estimation, which reveals to efficiently function which may be difficult or at least costly to perform. Kalman filters are a popular collection

  9. A KALMAN FILTER PRIMER BY R. L. EUBANK

    E-Print Network [OSTI]

    REVIEW OF A KALMAN FILTER PRIMER BY R. L. EUBANK CHAPMAN AND HALL/CRC 2006 DAVID S. WATKINS This small (12 × 17 cm) book is one man's take on how to explain the Kalman filter. As the author states of all the Kalman filter recursions. Part of the "no frills" aspect is that there are very few examples

  10. Fracture behavior of advanced ceramic hot gas filters: Final report

    SciTech Connect (OSTI)

    Singh, J.P.; Majumdar, S.; Sutaria, M.; Bielke, W. [Argonne National Lab., IL (United States). Energy Technology Div.

    1997-03-01T23:59:59.000Z

    This report presents the results of mechanical/microstructural evaluation, thermal shock/fatigue testing, and stress analyses of advanced hot-gas filters obtained from different manufacturers. These filters were fabricated from both monolithic ceramics and composites. The composite filters, made of both oxide and nonoxide materials, were in both as-fabricated and exposed conditions, whereas the monolithic filters were made only of nonoxide materials. Mechanical property measurement of composite filters included diametral compression testing with O-ring specimens and burst-testing of short filter segments with rubber plugs. In-situ strength of fibers in the composite filters was evaluated by microscopic technique. Thermal shock/fatigue resistance was estimated by measuring the strengths of filter specimens before and after thermal cycling from an air environment at elevated temperatures to a room temperature oil bath. Filter performance during mechanical and thermal shock/fatigue loadings was correlated with microstructural observations. Micromechanical models were developed to derive properties of composite filter constituents on the basis of measured mechanical properties of the filters. Subsequently, these properties were used to analytically predict the performance of composite filters during thermal shock loading.

  11. A TOWED PUMP AND SHIPBOARD FILTERING SYSTEM FOR SAMPLING

    E-Print Network [OSTI]

    ;452: A TOWED PUMP AND SHIPBOARD FILTERING SYSTEM FOR SAMPLING SMALL ZOOPLANKTERS ,.^^»»r, Commissioner BUREAU OF Commercial Fisheries, Donald L. McKernan, Director A TOWED PUMP AND SHIPBOARD FILTERING Performance 13 Discussion 17 Summary 18 Literature cited 19 111 #12;#12;A TOWED PUMP AND SHIPBOARD FILTERING

  12. Polycarbonate filter technique for collection of sorted cells

    SciTech Connect (OSTI)

    Folstad, L.; Look, M.; Pallavicini, M.

    1982-01-01T23:59:59.000Z

    We describe the application of polycarbonate filters to the collection of cells sorted by flow cytometry. Cells are sorted directly onto polycarbonate filters and transferred to microscope slides which are then processed to dissolve the filter and remove pore outlines. The technique results in cell preparations which retain cellular morphology and have highcell recovery of 82 to 100%.

  13. SOMS HYBRID SPIN-ON FILTER Sponsor: SOMS Technologies

    E-Print Network [OSTI]

    Salama, Khaled

    the lubricating oil. Some premium filters state filtration efficiency down to 25 microns. However, it is particles engine oil filters effectively remove contaminant particles larger than 40 -50 microns from smaller than these, which accumulate in the oil, damage the filter, and force regular and frequent oil

  14. Atmospheric Environment 41 (2007) 31513160 Ozone removal by HVAC filters

    E-Print Network [OSTI]

    Siegel, Jeffrey

    Atmospheric Environment 41 (2007) 3151­3160 Ozone removal by HVAC filters P. Zhao, J.A. Siegel�, R May 2006; accepted 14 June 2006 Abstract Residential and commercial HVAC filters that have been loaded of the relative importance of HVAC filters as a removal mechanism for ozone in residential and commercial

  15. Biodegradation of methyl tertiary butyl ether (MTBE) using a granular activated carbon trickling filter

    SciTech Connect (OSTI)

    Converse, B.M.; Schroeder, E.D.; Chang, D.P.Y.

    1999-07-01T23:59:59.000Z

    A pilot scale trickling filter was constructed using granular activated carbon (GAC) as the packing medium and inoculated with a microbial culture known to degrade MTBE. The packing dimensions were 0.076 m in diameter and 0.22 m deep. The unit operated with recycling flow for two months before a biofilm was observed on the GAC. After two additional months the biofilm had visibly spread throughout the packing. A few pieces of GAC were placed in a sealed bottle with MTBE-contaminated water and nutrients. Headspace analysis performed over 14 days confirmed that MTBE degradation was occurring. The trickling filter was converted to continuous flow and operated for one month at a nominal flow rate of 0.1 L/min and a hydraulic loading rate of 32 m{sup 3}/m{sup 2}-d. Samples were collected for analysis at the spray nozzle and at the bottom of the trickling filter. Fractional removal varied with influent MTBE concentration, temperature and liquid flow rate. Percent MTBE removal was as high as 85%. A mechanical failure resulted in the trickling filter bed drying and percent removal dropping to less than 1 percent. However, the system recovered within five days.

  16. Trip Report-Produced-Water Field Testing

    SciTech Connect (OSTI)

    Sullivan, Enid J. [Los Alamos National Laboratory

    2012-05-25T23:59:59.000Z

    Los Alamos National Laboratory (LANL) conducted field testing of a produced-water pretreatment apparatus with assistance from faculty at the Texas A&M University (TAMU) protein separation sciences laboratory located on the TAMU main campus. The following report details all of the logistics surrounding the testing. The purpose of the test was to use a new, commercially-available filter media housing containing modified zeolite (surfactant-modified zeolite or SMZ) porous medium for use in pretreatment of oil and gas produced water (PW) and frac-flowback waters. The SMZ was tested previously in October, 2010 in a lab-constructed configuration ('old multicolumn system'), and performed well for removal of benzene, toluene, ethylbenzene, and xylenes (BTEX) from PW. However, a less-expensive, modular configuration is needed for field use. A modular system will allow the field operator to add or subtract SMZ filters as needed to accommodate site specific conditions, and to swap out used filters easily in a multi-unit system. This test demonstrated the use of a commercial filter housing with a simple flow modification and packed with SMZ for removing BTEX from a PW source in College Station, Texas. The system will be tested in June 2012 at a field site in Pennsylvania for treating frac-flowback waters. The goals of this test are: (1) to determine sorption efficiency of BTEX in the new configuration; and (2) to observe the range of flow rates, backpressures, and total volume treated at a given flow rate.

  17. GLOSSARY OF WATER RESOURCES TERMS Compiled by

    E-Print Network [OSTI]

    District of Columbia, University of the

    ....................................................................................................109 The activities on which this report is based were financed in part by the Department resulting in land build-up. Acid Mine - Drainage - the water discharge from coal mines, usually highly and is equivalent to 46,560 cubic feet or about 326,000 gallons or 1,233 cubic meters. Activated Carbon Filter

  18. Controlling Overestimation of Error Covariance in Ensemble Kalman Filters with Sparse Observations: A Variance-Limiting Kalman Filter

    E-Print Network [OSTI]

    Gottwald, Georg A.

    Controlling Overestimation of Error Covariance in Ensemble Kalman Filters with Sparse Observations: A Variance-Limiting Kalman Filter GEORG A. GOTTWALD AND LEWIS MITCHELL School of Mathematics and Statistics of an ensemble Kalman filter when only partial observations are available is considered. In particular

  19. 11 Kalman Filtering and Certainty Equivalence We presents the important concepts of the Kalman filter, certainty-equivalence and the

    E-Print Network [OSTI]

    Weber, Richard

    11 Kalman Filtering and Certainty Equivalence We presents the important concepts of the Kalman. In the Gaussian case, it is also the maximum likelihood estimator. 11.2 The Kalman filter Let us make the LQG for these two quantities. Theorem 11.2 (The Kalman filter) Suppose that conditional on W0, the initial state x0

  20. Direct power control of shunt active filter using high selectivity filter (HSF) under distorted or unbalanced conditions

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    4 Direct power control of shunt active filter using high selectivity filter (HSF) under distorted.A. Djaffar) Abstract This paper describes the design of a new configuration of direct power control (DPC, Direct power control (DPC), Switching table, High selectivity filter, Distorted or unbalanced conditions

  1. Compact cyclone filter train for radiological and hazardous environments

    DOE Patents [OSTI]

    Bench, T.R.

    1998-04-28T23:59:59.000Z

    A compact cyclone filter train is disclosed for the removal of hazardous and radiological particles from a gaseous fluid medium. This filter train permits a small cyclone separator to be used in a very small space envelope due to the arrangement of the filter housing adjacent to the separator with the cyclone separator and the filters mounted on a plate. The entire unit will have a hoist connection at the center of gravity so that the entire unit including the separator, the filters, and the base can be lifted and repositioned as desired. 3 figs.

  2. Method of treating contaminated HEPA filter media in pulp process

    DOE Patents [OSTI]

    Hu, Jian S.; Argyle, Mark D.; Demmer, Ricky L.; Mondok, Emilio P.

    2003-07-29T23:59:59.000Z

    A method for reducing contamination of HEPA filters with radioactive and/or hazardous materials is described. The method includes pre-processing of the filter for removing loose particles. Next, the filter medium is removed from the housing, and the housing is decontaminated. Finally, the filter medium is processed as pulp for removing contaminated particles by physical and/or chemical methods, including gravity, flotation, and dissolution of the particles. The decontaminated filter medium is then disposed of as non-RCRA waste; the particles are collected, stabilized, and disposed of according to well known methods of handling such materials; and the liquid medium in which the pulp was processed is recycled.

  3. A Novel Technique for Inferior Vena Cava Filter Extraction

    SciTech Connect (OSTI)

    Johnston, Edward William, E-mail: ed.johnston@doctors.org.uk; Rowe, Luke Michael Morgan; Brookes, Jocelyn; Raja, Jowad; Hague, Julian, E-mail: julian.hague@uclh.nhs.uk [University College Hospital, Multidisciplinary Endovascular Team (United Kingdom)

    2013-05-02T23:59:59.000Z

    Inferior vena cava (IVC) filters are used to protect against pulmonary embolism in high-risk patients. Whilst the insertion of retrievable IVC filters is gaining popularity, a proportion of such devices cannot be removed using standard techniques. We describe a novel approach for IVC filter removal that involves snaring the filter superiorly along with the use of flexible forceps or laser devices to dissect the filter struts from the caval wall. This technique has used to successfully treat three patients without complications in whom standard techniques failed.

  4. Process for making ceramic hot gas filter

    DOE Patents [OSTI]

    Connolly, Elizabeth Sokolinski (Wilmington, DE); Forsythe, George Daniel (Landenberg, PA); Domanski, Daniel Matthew (New Castle, DE); Chambers, Jeffrey Allen (Hockessin, DE); Rajendran, Govindasamy Paramasivam (Boothwyn, PA)

    2001-01-01T23:59:59.000Z

    A ceramic hot-gas candle filter having a porous support of filament-wound oxide ceramic yarn at least partially surrounded by a porous refractory oxide ceramic matrix, and a membrane layer on at least one surface thereof. The membrane layer may be on the outer surface, the inner surface, or both the outer and inner surface of the porous support. The membrane layer may be formed of an ordered arrangement of circularly wound, continuous filament oxide ceramic yarn, a ceramic filler material which is less permeable than the filament-wound support structure, or some combination of continuous filament and filler material. A particularly effective membrane layer features circularly wound filament with gaps intentionally placed between adjacent windings, and a filler material of ceramic particulates uniformly distributed throughout the gap region. The filter can withstand thermal cycling during backpulse cleaning and is resistant to chemical degradation at high temperatures.

  5. Overlap zoned electrically heated particulate filter

    DOE Patents [OSTI]

    Gonze, Eugene V [Pinckney, MI; Chapman, Mark R [Brighton, MI

    2011-07-19T23:59:59.000Z

    A system includes a particulate matter (PM) filter that includes an upstream end for receiving exhaust gas and a downstream end. A zoned heater is arranged spaced from the upstream end and comprises N zones, where N is an integer greater than one, wherein each of the N zones comprises M sub-zones, where M is an integer greater than or equal to one, and wherein the N zones and the M sub-zones are arranged in P layers, where P is an integer greater than one. A control module selectively activates at least a selected one of the N zones to initiate regeneration in downstream portions of the PM filter from the one of the N zones and deactivates non-selected ones of the N zones.

  6. Generator powered electrically heated diesel particulate filter

    DOE Patents [OSTI]

    Gonze, Eugene V; Paratore, Jr., Michael J

    2014-03-18T23:59:59.000Z

    A control circuit for a vehicle powertrain includes a switch that selectivity interrupts current flow between a first terminal and a second terminal. A first power source provides power to the first terminal and a second power source provides power to the second terminal and to a heater of a heated diesel particulate filter (DPF). The switch is opened during a DPF regeneration cycle to prevent the first power source from being loaded by the heater while the heater is energized.

  7. Digital filter design approach for SQUID gradiometers

    SciTech Connect (OSTI)

    Bruno, A.C.; Ribeiro, P.C.

    1988-04-15T23:59:59.000Z

    A review of the traditional method for designing gradiometers is made. A nonrecursive digital filter model for the gradiometer is presented, giving a new set of parameters for the gradiometer identification. Some designs are analyzed using the proposed set. As an example, a true differentiator is designed to be used as the SQUID input coil. It is shown that the differentiator has the same noise rejection as the conventional gradiometer but provides more signal sensitivity.

  8. Emergency sacrificial sealing method in filters, equipment, or systems

    DOE Patents [OSTI]

    Brown, Erik P

    2014-09-30T23:59:59.000Z

    A system seals a filter or equipment component to a base and will continue to seal the filter or equipment component to the base in the event of hot air or fire. The system includes a first sealing material between the filter or equipment component and the base; and a second sealing material between the filter or equipment component and the base and proximate the first sealing material. The first sealing material and the second seal material are positioned relative to each other and relative to the filter or equipment component and the base to seal the filter or equipment component to the base and upon the event of fire the second sealing material will be activated and expand to continue to seal the filter or equipment component to the base in the event of hot air or fire.

  9. Analysis of characteristic of microwave regeneration for diesel particulate filter

    SciTech Connect (OSTI)

    Ning Zhi; Zhang Guanglong; Lu Yong; Liu Junmin; Gao Xiyan; Liang Iunhui; Chen Jiahua [Dalian Univ. of Technology (China)

    1995-12-31T23:59:59.000Z

    The mathematical model for the microwave regeneration of diesel particulate filter is proposed according to the characteristic of microwave regeneration process. The model is used to calculate the temperature field, distribution of particulate and density field of oxygen in the filter during the process of regeneration with typical ceramic foam particulate filter data. The parametric study demonstrates how some of the main parameters, such as microwave attenuation constant of the filter, filter particulate loading, the power and distribution of microwave energy and so on, affect the efficiency of regeneration, the maximum filter temperature and regeneration duration. The results show that it is possible to regenerate the diesel particulate filters in certain conditions by using microwave energy. This paper can give one a whole understanding to several main factors that have effects on the process of microwave regeneration and provide a theoretical basis for the optimal design of the microwave regeneration system.

  10. Tidal Residual Eddies and their Effect on Water Exchange in Puget Sound

    SciTech Connect (OSTI)

    Yang, Zhaoqing; Wang, Taiping

    2013-08-30T23:59:59.000Z

    Tidal residual eddies are one of the important hydrodynamic features in tidally dominant estuaries and coastal bays, and they could have significant effects on water exchange in a tidal system. This paper presents a modeling study of tides and tidal residual eddies in Puget Sound, a tidally dominant fjord-like estuary in the Pacific Northwest coast, using a three-dimensional finite-volume coastal ocean model. Mechanisms of vorticity generation and asymmetric distribution patterns around an island/headland were analyzed using the dynamic vorticity transfer approach and numerical experiments. Model results of Puget Sound show that a number of large twin tidal residual eddies exist in the Admiralty Inlet because of the presence of major headlands in the inlet. Simulated residual vorticities near the major headlands indicate that the clockwise tidal residual eddy (negative vorticity) is generally stronger than the anticlockwise eddy (positive vorticity) because of the effect of Coriolis force. The effect of tidal residual eddies on water exchange in Puget Sound and its sub-basins were evaluated by simulations of dye transport. It was found that the strong transverse variability of residual currents in the Admiralty Inlet results in a dominant seaward transport along the eastern shore and a dominant landward transport along the western shore of the Inlet. A similar transport pattern in Hood Canal is caused by the presence of tidal residual eddies near the entrance of the canal. Model results show that tidal residual currents in Whidbey Basin are small in comparison to other sub-basins. A large clockwise residual circulation is formed around Vashon Island near entrance of South Sound, which can potentially constrain the water exchange between the Central Basin and South Sound.

  11. Qualifications of Candle Filters for Combined Cycle Combustion Applications

    SciTech Connect (OSTI)

    Tomasz Wiltowski

    2008-08-31T23:59:59.000Z

    The direct firing of coal produces particulate matter that has to be removed for environmental and process reasons. In order to increase the current advanced coal combustion processes, under the U.S. Department of Energy's auspices, Siemens Westinghouse Power Corporation (SWPC) has developed ceramic candle filters that can operate at high temperatures. The Coal Research Center of Southern Illinois University (SIUC), in collaboration with SWPC, developed a program for long-term filter testing at the SIUC Steam Plant followed by experiments using a single-filter reactor unit. The objectives of this program funded by the U.S. Department of Energy were to identify and demonstrate the stability of porous candle filter elements for use in high temperature atmospheric fluidized-bed combustion (AFBC) process applications. These verifications were accomplished through extended time slipstream testing of a candle filter array under AFBC conditions using SIUC's existing AFBC boiler. Temperature, mass flow rate, and differential pressure across the filter array were monitored for a duration of 45 days. After test exposure at SIUC, the filter elements were characterized using Scanning Electron Microscopy and BET surface area analyses. In addition, a single-filter reactor was built and utilized to study long term filter operation, the permeability exhibited by a filter element before and after the slipstream test, and the thermal shock resilience of a used filter by observing differential pressure changes upon rapid heating and cooling of the filter. The data acquired during the slipstream test and the post-test evaluations demonstrated the suitability of filter elements in advanced power generation applications.

  12. Properties and characterization of an oxide/oxide composite filter

    SciTech Connect (OSTI)

    Lane, J.E.; Painter, C.J.; Su, W.F.A.; Radford, K.C. [Westinghouse Electric Corp., Pittsburgh, PA (United States). Science and Technology Center; LeCostaouec, J.F. [Techniweave, Inc., Rochester, NH (United States)

    1996-12-31T23:59:59.000Z

    Westinghouse, with Techniweave as a major subcontractor, is conducting a three-phase program aimed at providing advanced candle filters for a 1997 pilot scale demonstration in one of the two hot gas filter system at Southern Company Service`s Wilsonville PSD Facility. This program`s objective is to develop an oxide CFCC (continuous fiber ceramic composite) candle filter that is cost competitive with prototype next generation filters through the development of a low cost sol-gel fabrication process and a 3D fiber architecture optimized for high volume filter manufacturing. Phase 1, Filter Material Development and Evaluation, results will be presented. Phase 1 activities included laboratory-scale development, characterization, and testing of a mullite matrix 3D fiber-reinforced (Nextel 550) ceramic composite filter material. Eleven 3D architectures were designed, preforms and ceramic matrix composite (CMC) filter materials were made, tested and evaluated. The CMC fabrication process was optimized for reduced cost and acceptable filter performance. Permeability, 4-pt bend and microstructural evaluation results, previously presented, were used to downselect to one 3D architecture and CMC processing method. The downselected filter material was fabricated and tested via permeability and 4-pt bend; Weibull modulus was determined. High-temperature flow-through corrosion tests and thermal aging tests in static air up to 5,000 h were conducted. SEM and XRD have been used to characterize microstructural and phase changes, if any, from high temperature exposure testing. Weaving feasibility studies for the flange and the closed end of a candle filter have been conducted in order to develop a low cost weaving method to make a single piece candle filter fiber preform. Results and conclusions for the evaluation of the downselected filter material above will be presented and discussed.

  13. Fail Save Shut Off Valve for Filtering Systems Employing Candle Filters

    DOE Patents [OSTI]

    VanOsdol, John

    2006-01-03T23:59:59.000Z

    The invention relates to an apparatus that acts as a fail save shut off valve. More specifically, the invention relates to a fail save shut off valve that allows fluid flow during normal operational conditions, but prevents the flow of fluids in the event of system failure upstream that causes over-pressurization. The present invention is particularly well suited for use in conjunction with hot gas filtering systems, which utilize ceramic candle filters. Used in such a hot gas system the present invention stops the flow of hot gas and prevents any particulate laden gas from entering the clean side of the system.

  14. Fail save shut off valve for filtering systems employing candle filters

    DOE Patents [OSTI]

    VanOsdol, John (Fairmont, WV)

    2006-01-03T23:59:59.000Z

    The invention relates to an apparatus that acts as a fail save shut off valve. More specifically, the invention relates to a fail save shut off valve that allows fluid flow during normal operational conditions, but prevents the flow of fluids in the event of system failure upstream that causes over-pressurization. The present invention is particularly well suited for use in conjunction with hot gas filtering systems, which utilize ceramic candle filters. Used in such a hot gas system the present invention stops the flow of hot gas and prevents any particulate laden gas from entering the clean side of the system.

  15. PLANKTONIC DEEP-WATER COPEPODS OF THE FAMILY MORMONILLIDAE GIESBRECHT, 1893 FROM THE EAST PACIFIC RISE

    E-Print Network [OSTI]

    Ivanenko, Viatcheslav N.

    species were considered to be small particle-feeders, possessing filter baskets formed by feeding common in deep water is limited to the description of one species designated by Boxshall in 1979

  16. Large-Scale Synthesis of Lipid-Polymer Hybrid Nanoparticles Using a Multi-Inlet Vortex Reactor

    E-Print Network [OSTI]

    Zhang, Liangfang

    polymeric core for the efficient loading of poorly water-soluble drugs; a lipid monolayer surrounding the core that enhances the particle's stability in salt solutions and helps to reduce outward diffusion of drug; and a lipid-PEG outer corona that protects the particle from the immune system in vivo

  17. Design of the commissioning filter/mask/window assembly for undulator beamline front ends at the Advanced Photon Source

    SciTech Connect (OSTI)

    Shu, D.; Kuzay, T.M.

    1995-10-20T23:59:59.000Z

    A compact filter/mask/window assembly has been designed for undulator beamline commissioning activity at the Advanced Photon Source beamlines. The assembly consists of one 300-{mu}m graphite filter, one 127-{mu}m CVD diamond filter and two 250-{mu}m beryllium windows. A water-cooled Glidcop fixed mask with a 4.5-mm {times} 4.5-mm output optical aperture and a 0.96-mrad {times} 1.6-mrad beam missteering acceptance is a major part in the assembly. The CVD diamond filter which is mounted on the downstream side of the fixed mask is designed to also function as a transmitting x-ray beam position monitor. The sum signal from the latter can be used to monitor the physical condition of the graphite filter and prevent any possible chain reaction damage to the beryllium windows downstream. In this paper, the design concept as well as the detailed structural design of the commissioning window are presented. Further applications of the commissioning window commissioning window components are also discussed.

  18. Turbid water Clear water

    E-Print Network [OSTI]

    Jaffe, Jules

    : The submersible laser bathymetric (LBath) optical system is capable of simultaneously providing visual images- dynamical wing. This underwater package is pulled through the water by a single towed cable with fiber optic special high energy density optical fibers. A remote Pentium based PC also at the surface is used

  19. Water Intoxication

    E-Print Network [OSTI]

    Lingampalli, Nithya

    2013-01-01T23:59:59.000Z

    2008, May 14). Too much water raises seizure risk in babies.id=4844 9. Schoenly, Lorry. “Water Intoxication and Inmates:article/246650- overview>. 13. Water intoxication alert. (

  20. Filter diagonalization of shell-model calculations

    SciTech Connect (OSTI)

    Mizusaki, Takahiro [Institute of Natural Sciences, Senshu University, Tokyo 101-8425 (Japan); Kaneko, Kazunari [Department of Physics, Kyushu Sangyo University, Fukuoka 813-8503 (Japan); Honma, Michio [Center for Mathematical Sciences, University of Aizu, Aizu-Wakamatsu, 965-8580 (Japan); Sakurai, Tetsuya [Department of Computer Science, University of Tsukuba, Tsukuba, 305-8573 (Japan)

    2010-08-15T23:59:59.000Z

    We present a method of filter diagonalization for shell-model calculations. This method is based on the Sakurai and Sugiura (SS) method, but extended with the help of the shifted complex orthogonal conjugate gradient (COCG) method. A salient feature of this method is that it can calculate eigenvalues and eigenstates in a given energy interval. We show that this method can be an alternative to the Lanczos method for calculating ground and excited states, as well as spectral strength functions. With an application to the M-scheme shell-model calculations we demonstrate that several inherent problems in the widely used Lanczos method can be removed or reduced.

  1. Dynamic data filtering system and method

    DOE Patents [OSTI]

    Bickford, Randall L; Palnitkar, Rahul M

    2014-04-29T23:59:59.000Z

    A computer-implemented dynamic data filtering system and method for selectively choosing operating data of a monitored asset that modifies or expands a learned scope of an empirical model of normal operation of the monitored asset while simultaneously rejecting operating data of the monitored asset that is indicative of excessive degradation or impending failure of the monitored asset, and utilizing the selectively chosen data for adaptively recalibrating the empirical model to more accurately monitor asset aging changes or operating condition changes of the monitored asset.

  2. Low pass filter for plasma discharge

    DOE Patents [OSTI]

    Miller, Paul A. (Albuquerque, NM)

    1994-01-01T23:59:59.000Z

    An isolator is disposed between a plasma reactor and its electrical energy source in order to isolate the reactor from the electrical energy source. The isolator operates as a filter to attenuate the transmission of harmonics of a fundamental frequency of the electrical energy source generated by the reactor from interacting with the energy source. By preventing harmonic interaction with the energy source, plasma conditions can be readily reproduced independent of the electrical characteristics of the electrical energy source and/or its associated coupling network.

  3. Nuclear Filter Technology | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to: navigation, searchOfRoseConcerns Jumpsource History ViewTexas:NotreesNu Energie JumpFilter

  4. Desulfurization Fuel Filter | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels DataDepartment of Energy Your Density Isn't Your Destiny:Revised Finding of No53197E T A * S H I E L DBypassDesulfurization Fuel Filter

  5. Method of producing monolithic ceramic cross-flow filter

    DOE Patents [OSTI]

    Larsen, David A. (Clifton Park, NY); Bacchi, David P. (Schenectady, NY); Connors, Timothy F. (Watervliet, NY); Collins, III, Edwin L. (Albany, NY)

    1998-01-01T23:59:59.000Z

    Ceramic filter of various configuration have been used to filter particulates from hot gases exhausted from coal-fired systems. Prior ceramic cross-flow filters have been favored over other types, but those previously horn have been assemblies of parts somehow fastened together and consequently subject often to distortion or delamination on exposure hot gas in normal use. The present new monolithic, seamless, cross-flow ceramic filters, being of one-piece construction, are not prone to such failure. Further, these new products are made by novel casting process which involves the key steps of demolding the ceramic filter green body so that none of the fragile inner walls of the filter is cracked or broken.

  6. Optical ranked-order filtering using threshold decomposition

    DOE Patents [OSTI]

    Allebach, J.P.; Ochoa, E.; Sweeney, D.W.

    1987-10-09T23:59:59.000Z

    A hybrid optical/electronic system performs median filtering and related ranked-order operations using threshold decomposition to encode the image. Threshold decomposition transforms the nonlinear neighborhood ranking operation into a linear space-invariant filtering step followed by a point-to-point threshold comparison step. Spatial multiplexing allows parallel processing of all the threshold components as well as recombination by a second linear, space-invariant filtering step. An incoherent optical correlation system performs the linear filtering, using a magneto-optic spatial light modulator as the input device and a computer-generated hologram in the filter plane. Thresholding is done electronically. By adjusting the value of the threshold, the same architecture is used to perform median, minimum, and maximum filtering of images. A totally optical system is also disclosed. 3 figs.

  7. Method of producing monolithic ceramic cross-flow filter

    DOE Patents [OSTI]

    Larsen, D.A.; Bacchi, D.P.; Connors, T.F.; Collins, E.L. III

    1998-02-10T23:59:59.000Z

    Ceramic filter of various configuration have been used to filter particulates from hot gases exhausted from coal-fired systems. Prior ceramic cross-flow filters have been favored over other types, but those previously have been assemblies of parts somehow fastened together and consequently subject often to distortion or delamination on exposure hot gas in normal use. The present new monolithic, seamless, cross-flow ceramic filters, being of one-piece construction, are not prone to such failure. Further, these new products are made by a novel casting process which involves the key steps of demolding the ceramic filter green body so that none of the fragile inner walls of the filter is cracked or broken. 2 figs.

  8. Optical ranked-order filtering using threshold decomposition

    DOE Patents [OSTI]

    Allebach, Jan P. (West Lafayette, IN); Ochoa, Ellen (Pleasanton, CA); Sweeney, Donald W. (Alamo, CA)

    1990-01-01T23:59:59.000Z

    A hybrid optical/electronic system performs median filtering and related ranked-order operations using threshold decomposition to encode the image. Threshold decomposition transforms the nonlinear neighborhood ranking operation into a linear space-invariant filtering step followed by a point-to-point threshold comparison step. Spatial multiplexing allows parallel processing of all the threshold components as well as recombination by a second linear, space-invariant filtering step. An incoherent optical correlation system performs the linear filtering, using a magneto-optic spatial light modulator as the input device and a computer-generated hologram in the filter plane. Thresholding is done electronically. By adjusting the value of the threshold, the same architecture is used to perform median, minimum, and maximum filtering of images. A totally optical system is also disclosed.

  9. A study of polarization buildup by spin filtering

    SciTech Connect (OSTI)

    O'Brien, D. S. [School of Mathematics, Trinity College Dublin (Ireland)

    2008-04-30T23:59:59.000Z

    Many sets of polarization evolution equations have been suggested to describe the method of polarization buildup by spin filtering in storage rings. In this paper a generic system of polarization evolution equations describing spin filtering is derived and solved, then we compare and contrast this system to other descriptions of spin filtering appearing in the literature. This is of interest to projects planning to produce a polarized antiproton beam by spin filtering, and to any project utilizing spin filtering in storage rings. The physical processes responsible for spin filtering are analysed and their contributions to the dynamics of polarization buildup are highlighted. It is hoped that this will shed light on some of the confusion in the literature.

  10. Water Quality

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

    of desalination research. The primary technological method of generating additional water supplies is through desalination and enhanced water reuse and recycling technologies....

  11. Water Efficiency

    Energy Savers [EERE]

    Water Efficiency Hosted by: FEDERAL UTILITY PARTNERSHIP WORKING GROUP SEMINAR November 5-6, 2014 Cape Canaveral, Florida WATER EFFICIENCY Federal Utility Partnership Working Group...

  12. Method of recovering hazardous waste from phenolic resin filters

    DOE Patents [OSTI]

    Meikrantz, David H. (Idaho Falls, ID); Bourne, Gary L. (Idaho Falls, ID); McFee, John N. (Albuquerque, NM); Burdge, Bradley G. (Idaho Falls, ID); McConnell, Jr., John W. (Idaho Falls, ID)

    1991-01-01T23:59:59.000Z

    The invention is a process for the recovery of hazardous wastes such as heavy metals and radioactive elements from phenolic resin filter by a circulating a solution of 8 to 16 molar nitric acid at a temperature of 110 to 190 degrees F. through the filter. The hot solution dissolves the filter material and releases the hazardous material so that it can be recovered or treated for long term storage in an environmentally safe manner.

  13. TECHNICAL PAPER Micromachined W-band polymeric tunable iris filter

    E-Print Network [OSTI]

    Lin, Liwei

    -variable electrical length. Tunable filters with 3.8% tuning range at 20 GHz and a minimum insertion loss of 3.6 dTECHNICAL PAPER Micromachined W-band polymeric tunable iris filter Firas Sammoura · Liwei Lin.79 GHz and a minimum insertion loss of 2.37 dB with return loss better than 15 dB. As a tunable filter

  14. Ash reduction system using electrically heated particulate matter filter

    DOE Patents [OSTI]

    Gonze, Eugene V [Pinckney, MI; Paratore, Jr., Michael J; He, Yongsheng [Sterling Heights, MI

    2011-08-16T23:59:59.000Z

    A control system for reducing ash comprises a temperature estimator module that estimates a temperature of an electrically heated particulate matter (PM) filter. A temperature and position estimator module estimates a position and temperature of an oxidation wave within the electrically heated PM filter. An ash reduction control module adjusts at least one of exhaust flow, fuel and oxygen levels in the electrically heated PM filter to adjust a position of the oxidation wave within the electrically heated PM filter based on the oxidation wave temperature and position.

  15. analysis digital filter: Topics by E-print Network

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

    Sciences Websites Summary: . Significant im- provements have been achieved in the digital signal process- ing part of telecom systems digital filter of the analysis bank to...

  16. A Dwindling Filter Line Search Method for Unconstrained Optimization

    E-Print Network [OSTI]

    2011-01-12T23:59:59.000Z

    Page 1 .... In what follows, we consider an algorithm where a new dwindling multidimensional ... Now, we consider the multidimensional filter mechanism in [

  17. active filter utilizing: Topics by E-print Network

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

    Design (3) Course (Catalog) Description: Principles of active and passive filter design, frequency domain Computer Technologies and Information Sciences Websites Summary: EEE...

  18. activated soil filters: Topics by E-print Network

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

    Design (3) Course (Catalog) Description: Principles of active and passive filter design, frequency domain Computer Technologies and Information Sciences Websites Summary: EEE...

  19. Measuring PM Distribution in a Catalyzed Particulate Filter using...

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

    in a Catalyzed Particulate Filter using a Terahertz Wave Scanner Terahertz scanning system produced 3-dimensional image of local PM density in catatalyzed particulate...

  20. Evaluation of Alternative Filter Media for the Rotary Microfilter

    SciTech Connect (OSTI)

    Poirier, M. R.; Herman, D. T.; Bhave, R.

    2011-11-09T23:59:59.000Z

    The Savannah River Site is currently developing and testing several processes to treat high level radioactive liquid waste. Each of these processes has a solid-liquid separation process that limits its throughput. Savannah River National Laboratory researchers identified and tested the rotary microfilter as a technology to increase solid-liquid separation throughput. The authors believe the rotary microfilter throughput can be improved by using a better filter membrane. Previous testing showed that asymmetric filters composed of a ceramic membrane on top of a stainless steel support produced higher filter flux than 100% stainless steel symmetric filters in crossflow filter tests. Savannah River National Laboratory and Oak Ridge National Laboratory are working together to develop asymmetric ceramic ? stainless steel composite filters and asymmetric 100% stainless steel filters to improve the throughput of the rotary microfilter. The Oak Ridge National Laboratory Inorganic Membrane Group fabricated samples of alternative filter membranes. In addition, Savannah River National Laboratory obtained samples of filter membranes from Pall, Porvair, and SpinTek. They tested these samples in a static test cell with feed slurries containing monosodium titanate and simulated sludge.

  1. Real Time Estimation of Ship Motions Using Kalman Filtering Techniques

    E-Print Network [OSTI]

    Triantafyllou, Michael S.

    1983-01-01T23:59:59.000Z

    The estimation of the heave, pitch, roll, sway, and yaw motions of a DD-963 destroyer is studied, using Kalman filtering

  2. Improvement and Simplification of Diesel Particulate Filter System...

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

    Improvement and Simplification of Diesel Particulate Filter System using a Ceria-Based Fuel-Borne Catalyst in Serial Applications Improvement and Simplification of Diesel...

  3. Diesel Soot Filter Characterization and Modeling for Advanced...

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

    Substrates Diesel Soot Filter Characterization and Modeling for Advanced Substrates 2009 DOE Hydrogen Program and Vehicle Technologies Program Annual Merit Review and Peer...

  4. Diesel Soot Filter Characterization and Modeling for Advanced...

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

    and DOW Automotive) Diesel Soot Filter Characterization and Modeling for Advanced Substrates (CRADA and DOW Automotive) Presentation from the U.S. DOE Office of Vehicle...

  5. Diesel Soot Filter Characterization and Modeling for Advanced...

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

    with DOW Automotive) Diesel Soot Filter Characterization and Modeling for Advanced Substrates (CRADA with DOW Automotive) Presentation from the U.S. DOE Office of Vehicle...

  6. Diesel Particulate Filter: A Success for Faurecia Exhaust Systems

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

    DIESEL PARTICULATE FILTER: A SUCCESS FOR FAURECIA EXHAUST SYSTEMS Robert Parmann, Emmanuel Jean, Eric Quemere Faurecia Exhaust Systems DPF with Fuel Borne Catalyst DPF Experience...

  7. BLOCK DIAGONALLY DOMINANT POSITIVE DEFINITE APPROXIMATE FILTERS AND SMOOTHERS

    E-Print Network [OSTI]

    BLOCK DIAGONALLY DOMINANT POSITIVE DEFINITE APPROXIMATE FILTERS AND SMOOTHERS Running title: BLOCKÆciently small as to preclude the loss of positive de#12;niteness in the approximate equations. Therefore

  8. BLOCK DIAGONALLY DOMINANT POSITIVE DEFINITE APPROXIMATE FILTERS AND SMOOTHERS

    E-Print Network [OSTI]

    BLOCK DIAGONALLY DOMINANT POSITIVE DEFINITE APPROXIMATE FILTERS AND SMOOTHERS Running title: BLOCK the loss of positive definiteness in the approximate equations. Therefore previous analyses have

  9. Agents That Talk Back (Sometimes): Filter Programs for Affective Communication

    E-Print Network [OSTI]

    Bari, Università degli Studi di

    Agents That Talk Back (Sometimes): Filter Programs for Affective Communication Helmut Prendinger- action that supports basic features of affective conver- sation. As essential requirements for animated

  10. Optofluidic-Tunable Color Filters And Spectroscopy Based On Liquid...

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

    Based On Liquid-Crystal Microflows. Abstract: The integration of color filters with microfluidics has attracted substantial attention in recent years, for on-chip absorption,...

  11. active filter employing: Topics by E-print Network

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

    type). Traditional design Wilamowski, Bogdan Maciej 25 Virtual active filters for HVDC networks using V2G technology F.R. Islam Engineering Websites Summary: ) technology is...

  12. active power filters: Topics by E-print Network

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

    Varying Network Frequency Ramon Costa Hammerton, James 31 Virtual active filters for HVDC networks using V2G technology F.R. Islam Engineering Websites Summary: ) technology is...

  13. active power filtering: Topics by E-print Network

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

    Varying Network Frequency Ramon Costa Hammerton, James 31 Virtual active filters for HVDC networks using V2G technology F.R. Islam Engineering Websites Summary: ) technology is...

  14. active power filter: Topics by E-print Network

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

    Varying Network Frequency Ramon Costa Hammerton, James 31 Virtual active filters for HVDC networks using V2G technology F.R. Islam Engineering Websites Summary: ) technology is...

  15. Compact cyclone filter train for radiological and hazardous environments

    DOE Patents [OSTI]

    Bench, Thomas R. (Pittsburgh, PA)

    1998-01-01T23:59:59.000Z

    A compact cyclone filter train for the removal of hazardous and radiologi particles from a gaseous fluid medium which permits a small cyclone separator to be used in a very small space envelope due to the arrangement of the filter housing adjacent to the separator with the cyclone separator and the filters mounted on a plate. The entire unit will have a hoist connection at the center of gravity so that the entire unit including the separator, the filters, and the base can be lifted and repositioned as desired.

  16. Diesel Soot Filter Characterization and Modeling for Advanced...

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

    Review Diesel Soot Filter Characterization and Modeling for Advanced Substrates (CRADA with DOW Automotive) February 2008 Presenter Darrell Herling Tom Gallant, Program Manager...

  17. Diesel Soot Filter Characterization and Modeling for Advanced...

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

    Review Diesel Soot Filter Characterization and Modeling for Advanced Substrates (CRADA with DOW Automotive) February 2007 Presenter Darrell Herling Tom Gallant, Program Manager...

  18. Blowers for Air Assisted Diesel Particulate Filter Regeneration...

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

    Filter Regeneration Prototypes of a new series of high-pressure, brushless DC motor-drive blowers have completed field testing, and DFM and manufacturing cost studies are...

  19. Diesel Particulate Filter Technology for Low-Temperature and...

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

    Methods Using Air Restriction Wastega te Compressor Intercooler Turbine Air Filter Pre-Turbo Throttle Exhaust brake VGT Intake Throttle CRT Method Selected Method Selected...

  20. Optimal design of AC filter circuits in HVDC converter stations

    SciTech Connect (OSTI)

    Saied, M.M.; Khader, S.A. [Kuwait Univ. (Kuwait). Electrical and Computer Engineering Dept.

    1995-12-31T23:59:59.000Z

    This paper investigates the reactive power as well as the harmonic conditions on both the valve and the AC-network sides of a HVDC converter station. The effect of the AC filter circuits is accurately modeled. The program is then augmented by adding an optimization routine. It can identify the optimal filter configuration, yielding the minimum current distortion factor at the AC network terminals for a prespecified fundamental reactive power to be provided by the filter. Several parameter studies were also conducted to illustrate the effect of accidental or intentional deletion of one of the filter branches.

  1. Biodiesel Effects on Diesel Particle Filter Performance: Milestone Report

    SciTech Connect (OSTI)

    Williams, A.; McCormick, R. L.; Hayes, R.; Ireland, J.

    2006-03-01T23:59:59.000Z

    Research results on the performance of biodiesel and biodiesel blends with ultra-low sulfur diesel (ULSD) and a diesel particle filter (DPF).

  2. Effect of Biodiesel Blends on Diesel Particulate Filter Performance

    SciTech Connect (OSTI)

    Williams, A.; McCormick, R. L.; Hayes, R. R.; Ireland, J.; Fang, H. L.

    2006-11-01T23:59:59.000Z

    Presents results of tests of ultra-low sulfur diesel blended with soy-biodiesel at 5 percent using a Cummins ISB engine with a diesel particulate filter.

  3. Kalman Filter Tracking on Parallel Architectures

    E-Print Network [OSTI]

    Giuseppe Cerati; Peter Elmer; Steven Lantz; Kevin McDermott; Dan Riley; Matevž Tadel; Peter Wittich; Frank Würthwein; Avi Yagil

    2015-05-18T23:59:59.000Z

    Power density constraints are limiting the performance improvements of modern CPUs. To address this we have seen the introduction of lower-power, multi-core processors, but the future will be even more exciting. In order to stay within the power density limits but still obtain Moore's Law performance/price gains, it will be necessary to parallelize algorithms to exploit larger numbers of lightweight cores and specialized functions like large vector units. Example technologies today include Intel's Xeon Phi and GPGPUs. Track finding and fitting is one of the most computationally challenging problems for event reconstruction in particle physics. At the High Luminosity LHC, for example, this will be by far the dominant problem. The need for greater parallelism has driven investigations of very different track finding techniques including Cellular Automata or returning to Hough Transform. The most common track finding techniques in use today are however those based on the Kalman Filter. Significant experience has been accumulated with these techniques on real tracking detector systems, both in the trigger and offline. They are known to provide high physics performance, are robust and are exactly those being used today for the design of the tracking system for HL-LHC. Our previous investigations showed that, using optimized data structures, track fitting with Kalman Filter can achieve large speedup both with Intel Xeon and Xeon Phi. We report here our further progress towards an end-to-end track reconstruction algorithm fully exploiting vectorization and parallelization techniques in a realistic simulation setup.

  4. Feasibility study 100 K East Area water purification pools fish-rearing program

    SciTech Connect (OSTI)

    Betsch, M.D., Westinghouse Hanford

    1996-07-03T23:59:59.000Z

    As part of the feasibility study, a design analysis was conducted to determine the usefulness of the existing sand filters and associated media for reuse. The sand filters which were studied for potential reuse are located on the northern end of the 100-K East Area water filtration plant on the Hanford Site. This plant is located about one- half mile from the Columbia River. The sand filters were originally part of a system which was used to provide cooling water to the nearby plutonium production K Reactors. This Cold War operation took place until 1971, at which time the K Reactors were closed for eventual decontamination and decommissioning. Recently, it was decided to study the concept of putting the sand filter structures back into use for fish-rearing purposes. Because the water that circulated through the water purification pools (K Pools) and associated sand filters was clean river water, there is little chance of the structures being radioactively contaminated. To date, separate K Pools have been used for raising a variety of cold water fish species, including white sturgeon and fall chinook salmon, as well as for providing potable water to the 100 K Area of the Hanford Site for fire and service water purposes.

  5. A Kalman-Particle Kernel Filter and its Application to Terrain Navigation

    E-Print Network [OSTI]

    Del Moral , Pierre

    A Kalman-Particle Kernel Filter and its Application to Terrain Navigation Dinh-Tuan Pham.musso@onera.fr Abstract ­ A new nonlinear filter, the Kalman- Particle Kernel Filter (KPKF) is proposed. Compared. Keywords: Kalman filter, kernel density estimator, regularized particle filter, Inertial navigation System

  6. Water Heaters and Hot Water Distribution Systems

    E-Print Network [OSTI]

    Lutz, Jim

    2012-01-01T23:59:59.000Z

    the temperature of the residual water encountered by theof hot water and the residual water might occur: (1) thehot water might drive the residual water through the piping

  7. Water Heaters and Hot Water Distribution Systems

    E-Print Network [OSTI]

    Lutz, Jim

    2012-01-01T23:59:59.000Z

    Transportation Water Heaters and Hot Water DistributionLaboratory). 2008. Water Heaters and Hot Water Distributionfor instantaneous gas water heaters; and pressure loss

  8. EFFECT OF FILTER TEMPERATURE ON TRAPPING ZINC VAPOR

    SciTech Connect (OSTI)

    Korinko, P.

    2011-03-25T23:59:59.000Z

    To address the {sup 65}Zn contamination issue in the TEF, a multi-task experimental program was initiated. The first experimental task was completed and is reported in Ref. 1. The results of the second experimental task are reported here. This task examined the effect of filter temperature on trapping efficiency and deposit morphology. Based on the first experimental tasks that examined filter pore size and trapping efficiency, stainless steel filter media with a 20 {micro}m pore size was selected. A series of experiments using these filters was conducted during this second task to determine the effect of filter temperature on zinc vapor trapping efficiency, adhesion and morphology. The tests were conducted with the filters heated to 60, 120, and 200 C; the zinc source material was heated to 400 C for all the experiments to provide a consistent zinc source. The samples were evaluated for mass change, deposit adhesion and morphology. As expected from the physical vapor deposition literature, a difference in deposit morphology and appearance was observed between the three filter temperatures. The filter held at 60 C had the largest average mass gain while the 120 and 200 C filters exhibited similar but lower weight gains. The standard deviations were large and suggest that all three temperatures exhibited comparable gains. No zinc was detected on the backside surface of the filters indicating high efficiency for front and internal trapping. A zinc rich deposit was formed on the surface of the 60 C filter. Based on a simple tape adhesion test, the surface zinc was readily removed from the 60 C filter while less zinc deposit was removed from the 120 and 200 C filter samples. It is surmised that the higher temperatures enable the zinc to deposit within the filter media rather than on the surface. Based on the findings that all three statistically trapped the same quantity of zinc vapor and that the higher temperatures resulted in a more adherent/better trapped product, operating the filters at 120 to 200 C is recommended.

  9. Metal spray apparatus with a U-shaped electric inlet gas heater and a one-piece electric heater surrounding a nozzle

    DOE Patents [OSTI]

    Glovan, R.J.; Tierney, J.C.; McLean, L.L.; Johnson, L.L.; Verbael, D.J.

    1995-10-17T23:59:59.000Z

    An electrically heated metal spray apparatus is provided with a supersonic nozzle. Molten metal is injected into a gas stream flowing through the nozzle under pressure. By varying the pressure of the injected metal, the droplet can be made in various selected sizes with each selected size having a high degree of size uniformity. A unique one piece graphite heater provides easily controlled uniformity of temperature in the nozzle and an attached tundish which holds the pressurized molten metal. A unique U-shaped gas heater provides extremely hot inlet gas temperatures to the nozzle. A particularly useful application of the spray apparatus is coating of threads of a fastener with a shape memory alloy. This permits a fastener to be easily inserted and removed but provides for a secure locking of the fastener in high temperature environments. 12 figs.

  10. Metal spray apparatus with a U-shaped electric inlet gas heater and a one-piece electric heater surrounding a nozzle

    DOE Patents [OSTI]

    Glovan, Ronald J. (Butte, MT); Tierney, John C. (Butte, MT); McLean, Leroy L. (Butte, MT); Johnson, Lawrence L. (Butte, MT); Verbael, David J. (Butte, MT)

    1995-01-01T23:59:59.000Z

    An electrically heated metal spray apparatus is provided with a supersonic nozzle. Molten metal is injected into a gas stream flowing through the nozzle under pressure. By varying the pressure of the injected metal, the droplet can be made in various selected sizes with each selected size having a high degree of size uniformity. A unique one piece graphite heater provides easily controlled uniformity of temperature in the nozzle and an attached tundish which holds the pressurized molten metal. A unique U-shaped gas heater provides extremely hot inlet gas temperatures to the nozzle. A particularly useful application of the spray apparatus is coating of threads of a fastener with a shape memory alloy. This permits a fastener to be easily inserted and removed but provides for a secure locking of the fastener in high temperature environments.

  11. Filtering a statistically exactly solvable test model for turbulent tracers from partial observations

    SciTech Connect (OSTI)

    Gershgorin, B., E-mail: borisg@cims.nyu.ed [Department of Mathematics and Center for Atmosphere and Ocean Science, Courant Institute of Mathematical Sciences, New York University, NY 10012 (United States); Majda, A.J. [Department of Mathematics and Center for Atmosphere and Ocean Science, Courant Institute of Mathematical Sciences, New York University, NY 10012 (United States)

    2011-02-20T23:59:59.000Z

    A statistically exactly solvable model for passive tracers is introduced as a test model for the authors' Nonlinear Extended Kalman Filter (NEKF) as well as other filtering algorithms. The model involves a Gaussian velocity field and a passive tracer governed by the advection-diffusion equation with an imposed mean gradient. The model has direct relevance to engineering problems such as the spread of pollutants in the air or contaminants in the water as well as climate change problems concerning the transport of greenhouse gases such as carbon dioxide with strongly intermittent probability distributions consistent with the actual observations of the atmosphere. One of the attractive properties of the model is the existence of the exact statistical solution. In particular, this unique feature of the model provides an opportunity to design and test fast and efficient algorithms for real-time data assimilation based on rigorous mathematical theory for a turbulence model problem with many active spatiotemporal scales. Here, we extensively study the performance of the NEKF which uses the exact first and second order nonlinear statistics without any approximations due to linearization. The role of partial and sparse observations, the frequency of observations and the observation noise strength in recovering the true signal, its spectrum, and fat tail probability distribution are the central issues discussed here. The results of our study provide useful guidelines for filtering realistic turbulent systems with passive tracers through partial observations.

  12. EVALUATION OF ALTERNATIVE FILTER MEDIA FOR THE ROTARY MICROFILTER

    SciTech Connect (OSTI)

    Poirier, M.; Herman, D.; Bhave, R.

    2011-09-13T23:59:59.000Z

    SRS is currently developing and testing several processes to treat high level radioactive liquid waste. These processes include the Integrated Salt Disposition Process (ISDP), the Salt Waste Processing Facility (SWPF), and the Small Column Ion Exchange Process (SCIX). Each of these processes has a solid-liquid separation process that limits its throughput. SRNL researchers identified and tested the rotary microfilter as a technology to increase solid-liquid separation throughput. The testing showed significant improvement in filter flux with the rotary microfilter over the baseline crossflow filter (i.e., 2.5-6.5X during scoping tests, as much as 10X in actual waste tests, and approximately 3X in pilot-scale tests). SRNL received funding from DOE EM-21, and subsequently DOE EM-31 to develop the rotary microfilter for high level radioactive service. The work has included upgrading the rotary microfilter for radioactive service, testing with simulated SRS waste streams, and testing it with simulated Hanford waste streams. While the filtration rate is better than that obtained during testing of crossflow filters, the authors believe the rotary microfilter throughput can be improved by using a better filter membrane. The rotary microfilter membrane is made of stainless steel (Pall PMM050). Previous testing, funded by DOE EM-21, showed that asymmetric filters composed of a ceramic membrane on top of a stainless steel support produced higher filter flux than 100% stainless steel symmetric filters in crossflow filter tests. In that testing, the Pall Accusep and Graver filters produced 13-21% larger filter flux than the baseline 0.1 {micro}m Mott filter. While the improvement in flux is not as dramatic as the improvement of the rotary filter over a crossflow filter, a 13-21% increase could reduce the lifetime of a 30 year process by 4-6 years, with significant cost savings. Subsequent rotary filter testing showed the Pall PMM050 stainless steel filter membrane produced higher flux than the Mott filter media in bench-scale and pilot-scale testing. The Accusep and Graver filter media were not evaluated in that testing, because they are not available as flat sheets. The Accusep filter was developed at ORNL and licensed to Pall Corporation. This filter has a stainless steel support structure with a zirconium oxide ceramic membrane. The pore size is 0.1 {micro}m absolute. The Graver filter has a stainless steel support structure with a titanium dioxide ceramic membrane. The pore size is 0.07 {micro}m absolute. SRNL and ORNL are working together to develop filter media similar to the Accusep and Graver media, and to test them in a bench-scale filtration apparatus to attempt to improve the throughput of the rotary microfilter. This report describes the effort.

  13. Math 5654 4cr Spring 2010 Prediction and Filtering

    E-Print Network [OSTI]

    Krylov, Nicolai

    Math 5654 4cr Spring 2010 Syllabus Prediction and Filtering Lectures: 10:10am-12:05pm TTh, VinH 364: Saturday, May 15, 4 pm-6 pm. A few homeworks wil be assigned and the grades for them will enter as 2-dimensional case 133 2:2. Multidimensional case 137 3. Linear filtering 147 Chapter 6. Wiener process

  14. Ensemble transform Kalman-Bucy filters Javier Amezcua 1

    E-Print Network [OSTI]

    Reich, Sebastian

    1 Ensemble transform Kalman-Bucy filters Javier Amezcua 1 jamezcua@atmos.umd.edu Kayo Ide 1 2 3 4 Meteorological Society. #12;2 Abstract Two recent works have adapted the Kalman-Bucy filter into an ensemble of these alternatives are discussed. Finally, the performance of our ensemble transform Kalman-Bucy implementations

  15. Evaluation of Kalman Filtering for Network Time Keeping Aggelos Bletsas

    E-Print Network [OSTI]

    Evaluation of Kalman Filtering for Network Time Keeping Aggelos Bletsas Massachusetts Institute com- puting and communication. This work describes and evalu- ates a novel Kalman filtering algorithm exchanged have the NTP format and the algorithm evaluated, is performed only at the client side. The Kalman

  16. Fast Kalman filtering on quasilinear dendritic trees Liam Paninski

    E-Print Network [OSTI]

    Columbia University

    Fast Kalman filtering on quasilinear dendritic trees Liam Paninski Department of Statistics on the order of N = 104 compartments. Standard implementations of the Kalman filter require O(N3 ) time and O of compartments at a time. The idea is to approximate the Kalman equations in terms of a low-rank perturbation

  17. Kalman Filtering with Uncertain Noise Covariances Srikiran Kosanam Dan Simon

    E-Print Network [OSTI]

    Simon, Dan

    Kalman Filtering with Uncertain Noise Covariances Srikiran Kosanam Dan Simon Department.kosanam@csuohio.edu d.j.simon@csuohio.edu Abstract - In this paper the robustness of Kalman filtering against uncertainties in process and measurement noise covariances is discussed. It is shown that a standard Kalman

  18. Study on optical finite impulse response filter Guangjie Zeng

    E-Print Network [OSTI]

    Study on optical finite impulse response filter Ying Zhou Guangjie Zeng Feihong Yu Zhejiang University State Key Laboratory of Modern Optical Instrumentation Optical Engineering Department Hangzhou Kong Abstract. We present an optical finite impulse response (FIR) filter de- sign method. Based

  19. SPEECH ENHANCEMENT USING A STATISTICALLY DERIVED FILTER MAPPING

    E-Print Network [OSTI]

    Kabal, Peter

    SPEECH ENHANCEMENT USING A STATISTICALLY DERIVED FILTER MAPPING Yan Ming Cheng, Douglas, Quebec H3E 1H6 Canada Abstract We view the speech enhancement task in two aspects: reduc- tion Mapping (NISSM) to estimate a speech enhancement Wiener filter. NISSM consists of a noise

  20. 3D Wavelet-Based Filter and Method

    DOE Patents [OSTI]

    Moss, William C. (San Mateo, CA); Haase, Sebastian (San Francisco, CA); Sedat, John W. (San Francisco, CA)

    2008-08-12T23:59:59.000Z

    A 3D wavelet-based filter for visualizing and locating structural features of a user-specified linear size in 2D or 3D image data. The only input parameter is a characteristic linear size of the feature of interest, and the filter output contains only those regions that are correlated with the characteristic size, thus denoising the image.