National Library of Energy BETA

Sample records for duct sealing technology

  1. Sealing Ducts in Large Commercial Buildings with Aerosolized Sealant Particles

    E-Print Network [OSTI]

    2001-01-01

    Building Cavities Used As Ducts: Air Leakage Characteristicspan” technique to prioritize duct sealing efforts: a studyField investigation of duct system performance in California

  2. Sealing Ducts in Large Commercial Buildings with Aerosolized Sealant M. P. Modera, O. Brzozowski**

    E-Print Network [OSTI]

    LBNL-42414 1 Sealing Ducts in Large Commercial Buildings with Aerosolized Sealant Particles M. P Abstract Electricity energy savings potential by eliminating air leakage from ducts in large commercial buildings, a new technology that simultaneously seals duct leaks and measures effective leakage area

  3. Ducts Sealing Using Injected Spray Sealant, Raleigh, North Carolina (Fact Sheet), Building America Case Study: Technology Solutions for New and Existing Homes, Building Technologies Office (BTO)

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:FinancingPetroleum Based| Department8,Department of2 FederalEnergyDucts Sealing Using Injected

  4. Leaf seal for transition duct in turbine system

    DOE Patents [OSTI]

    Flanagan, James Scott; LeBegue, Jeffrey Scott; McMahan, Kevin Weston; Dillard, Daniel Jackson; Pentecost, Ronnie Ray

    2013-06-11

    A turbine system is disclosed. In one embodiment, the turbine system includes a transition duct. The transition duct includes an inlet, an outlet, and a passage extending between the inlet and the outlet and defining a longitudinal axis, a radial axis, and a tangential axis. The outlet of the transition duct is offset from the inlet along the longitudinal axis and the tangential axis. The transition duct further includes an interface member for interfacing with a turbine section. The turbine system further includes a leaf seal contacting the interface member to provide a seal between the interface member and the turbine section.

  5. Flexible metallic seal for transition duct in turbine system

    SciTech Connect (OSTI)

    Flanagan, James Scott; LeBegue, Jeffrey Scott; McMahan, Kevin Weston; Dillard, Daniel Jackson; Pentecost, Ronnie Ray

    2014-04-22

    A turbine system is disclosed. In one embodiment, the turbine system includes a transition duct. The transition duct includes an inlet, an outlet, and a passage extending between the inlet and the outlet and defining a longitudinal axis, a radial axis, and a tangential axis. The outlet of the transition duct is offset from the inlet along the longitudinal axis and the tangential axis. The transition duct further includes an interface member for interfacing with a turbine section. The turbine system further includes a flexible metallic seal contacting the interface member to provide a seal between the interface member and the turbine section.

  6. Developing a market-based utility duct sealing program

    SciTech Connect (OSTI)

    Davis, B.; Baylon, D.; Houseknecht, A.

    1998-07-01

    In recent years, residential energy conservation research has focused attention on heating system distribution efficiency. Several field studies in the Pacific Northwest have found forced-air heating systems which have a majority of ducts located in unheated buffer spaces can lose as much as 30% of the equipment's heating output to duct air leakage and conduction loss. The magnitude of loss can be equivalent to the combined improvements in building shell insulation levels due to updated energy codes. Field review of forced-air heating systems often uncovers other problems with duct layout and equipment performance. Several challenges face utilities planning to undertake a large-scale duct-sealing program. Most notable of these challenges are finding suitable homes; working with field protocols which encourage consistent, successful work; and measuring the effects of the work through field quality control and impact analysis. This paper describes the response rate for duct sealing services based on one marketing approach and describes bill and field test screening criteria used to narrow the list of retrofit candidates. Results form the screening are presented, along with preliminary retrofit results and important operations and maintenance findings.

  7. Method and apparatus for duct sealing using a clog-resistant insertable injector

    DOE Patents [OSTI]

    Wang, Duo (Albany, CA); Modera, Mark P. (Piedmont, CA)

    2010-12-14

    A method for forming a duct access region through one side of a previously installed air duct, wherein the air duct has an air flow with an air flow direction by inserting an aerosol injector into a previously installed air duct through the access region. The aerosol injector includes a liquid tube having a liquid tube orifice for ejecting a liquid to be atomized; and a propellant cap. The method is accomplished by aligning the aerosol injector with the direction of air flow in the duct; activating an air flow within the duct; and spraying a sealant through the aerosol injector to seal the duct in the direction of the air flow.

  8. Ducts Sealing Using Injected Spray Sealant, Raleigh, North Carolina (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2014-03-01

    In multifamily and attached buildings, traditional duct sealing methods are often impractical or costly and disruptive because of the difficulty in accessing leakage sites. In this project, two retrofit duct sealing techniques - manually-applied sealants and injecting a spray sealant, were implemented in several low-rise multi-unit buildings. An analysis on the cost and performance of the two methods are presented. Each method was used in twenty housing units: approximately half of each group of units are single story and the remainder two-story. Results show that duct leakage to the outside was reduced by an average of 59% through the use of manual methods, and by 90% in the units where the injected spray sealant was used. It was found that 73% of the leakage reduction in homes that were treated with injected spray sealant was attributable to the manual sealing done at boots, returns and the air handler. The cost of manually-applying sealant ranged from $275 to $511 per unit and for the injected spray sealant the cost was $700 per unit. Modeling suggests a simple payback of 2.2 years for manual sealing and 4.7 years for the injected spray sealant system. Utility bills were collected for one year before and after the retrofits. Utility bill analysis shows 14% and 16% energy savings using injected spray sealant system and hand sealing procedure respectively in heating season whereas in cooling season, energy savings using injected spray sealant system and hand sealing were both 16%.

  9. Duct System Flammability and Air Sealing Fire Separation Assemblies in the International Residential Code

    SciTech Connect (OSTI)

    Rudd, A.; Prahl, D.

    2014-12-01

    IBACOS identified two barriers that limit the ability of builders to cost-effectively achieve higher energy efficiency levels in housing. These are (1) the use of duct system materials that inherently achieve airtightness and are appropriately sized for low-load houses and (2) the ability to air seal fire separation assemblies. The issues identified fall into a gray area of the codes.

  10. Duct System Flammability and Air Sealing Fire Separation Assemblies in the International Residential Code

    SciTech Connect (OSTI)

    Rudd, A.; Prahl, D.

    2014-12-01

    IBACOS identified two barriers that limit the ability of builders to cost-effectively achieve higher energy efficiency levels in housing. These are the use of duct system materials that inherently achieve airtightness and are appropriately sized for low-load houses and the ability to air seal fire separation assemblies. The issues identified fall into a gray area of the codes.

  11. Building America Technology Solutions for New and Existing Homes...

    Energy Savers [EERE]

    Duct Sealing Using Injected Spray Sealant Building America Technology Solutions for New and Existing Homes: Duct Sealing Using Injected Spray Sealant In this project, the Raleigh...

  12. Duct System Flammability and Air Sealing Fire Separation Assemblies...

    Office of Scientific and Technical Information (OSTI)

    Technologies Office Country of Publication: United States Language: English Subject: 32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; RESIDENTIAL BUILDINGS; AIRTIGHTNESS;...

  13. Duct injection technology prototype development: Evaluation of engineering data

    SciTech Connect (OSTI)

    Not Available

    1990-07-01

    The objective of the Duct Injection Technology Prototype Development Project is to develop a sound design basis for applying duct injection technology as a post-combustion SO{sub 2}emissions control method to existing coal-fired power plants. The necessary engineering design and scale-up criteria will be developed for the commercialization of duct injection technology for the control of SO{sub 2} emissions from coal-fired boilers in the utility industry. The primary focus of the analyses summarized in this Topical Report is the review of the known technical and economic information associated with duct injection technology. (VC)

  14. Building America Technology Solutions Case Study: Sealed Crawled...

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

    Case Study: Sealed Crawled Spaces with Integrated Whole-House Ventilation in a Cold Climate Building America Technology Solutions Case Study: Sealed Crawled Spaces with...

  15. Duct injection technology prototype development: Nozzle development Subtask 4. 1, Atomizer specifications for duct injection technology

    SciTech Connect (OSTI)

    Not Available

    1992-02-01

    Babcock Wilcox has conducted a program to identify atomizers appropriate for successful in-duct injection of humidification water and lime slurries. The purpose of this program was to identify and quantify atomizer spray and performance criteria that affect the operations and reliability of the in-duct SO{sub 2} removal process, and compare commercially available atomizers to these criteria.

  16. Remote Duct Sealing in Residential and Commercial Buildings: ÂŤSaving Money, Saving Energy and Improving PerformanceÂŽ

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:Financing Tool FitsProject Developsfor UCNIEnvironmentalAHRIRemote Duct Sealing in Residential and

  17. Seal 

    E-Print Network [OSTI]

    Unknown

    2011-08-17

    Windback seals work similarly to labyrinth seals except for the effect of helical groove. These seals are essentially a tooth on stator or tooth on rotor labyrinth seal where the grooves are a continuous helical cut like a thread. Windback seals...

  18. Field Trial of an Aerosol-Based Enclosure Sealing Technology

    SciTech Connect (OSTI)

    Harrington, Curtis; Springer, David

    2015-09-01

    This report presents the results from several demonstrations of a new method for sealing building envelope air leaks using an aerosol sealing process developed by the Western Cooling Efficiency Center at UC Davis. The process involves pressurizing a building while applying an aerosol sealant to the interior. As air escapes through leaks in the building envelope, the aerosol particles are transported to the leaks where they collect and form a seal that blocks the leak. Standard blower door technology is used to facilitate the building pressurization, which allows the installer to track the sealing progress during the installation and automatically verify the final building tightness. Each aerosol envelope sealing installation was performed after drywall was installed and taped, and the process did not appear to interrupt the construction schedule or interfere with other trades working in the homes. The labor needed to physically seal bulk air leaks in typical construction will not be replaced by this technology. However, this technology is capable of bringing the air leakage of a building that was built with standard construction techniques and HERS-verified sealing down to levels that would meet DOE Zero Energy Ready Homes program requirements. When a developer is striving to meet a tighter envelope leakage specification, this technology could greatly reduce the cost to achieve that goal by providing a simple and relatively low cost method for reducing the air leakage of a building envelope with little to no change in their common building practices.

  19. 7/11/00-draft copy: do not quote 1 of 30 New Technologies for Residential HVAC Ducts

    E-Print Network [OSTI]

    7/11/00-draft copy: do not quote 1 of 30 New Technologies for Residential HVAC Ducts Burke Treidler, and are difficult to install in a manner which will insure no leaks. This report summarizes the potential for new technologies for ducts, duct fittings, and insulation. It begins with a review of what technology is currently

  20. Duct joining system

    DOE Patents [OSTI]

    Proctor, John P. (44 Glen Dr., Fairfax, CA 94930); deKieffer, Robert C. (Boulder, CO)

    2001-01-01

    A duct joining system for providing an air-tight seal and mechanical connection for ducts and fittings is disclosed. The duct joining system includes a flexible gasket affixed to a male end of a duct or fitting. The flexible gasket is affixed at an angle relative to normal of the male end of the duct. The female end of the other duct includes a raised bead in which the flexible gasket is seated when the ducts are properly joined. The angled flexible gasket seated in the raised bead forms an air-tight seal as well as fastens or locks the male end to the female end. Alternatively, when a flexible duct is used, a band clamp with a raised bead is clamped over the female end of the flexible duct and over the male end of a fitting to provide an air tight seal and fastened connection.

  1. Duct Joining System

    DOE Patents [OSTI]

    Proctor, John P. (Fairfax, CA)

    2001-02-27

    A duct joining system for providing an air-tight seal and mechanical connection for ducts and fittings is disclosed. The duct joining system includes a flexible gasket affixed to a male end of a duct or fitting. The flexible gasket is affixed at an angle relative to normal of the male end of the duct. The female end of the other duct includes a raised bead in which the flexible gasket is seated when the ducts are properly joined. The angled flexible gasket seated in the raised bead forms an air-tight seal as well as fastens or locks the male end to the female end. Alternatively, when a flexible duct is used, a band clamp with a raised bead is clamped over the female end of the flexible duct and over the male end of a fitting to provide an air tight seal and fastened connection.

  2. Duct injection technology prototype development: Nozzle development Subtask 4.1, Atomizer specifications for duct injection technology. Topical report 8

    SciTech Connect (OSTI)

    Not Available

    1992-02-01

    Babcock & Wilcox has conducted a program to identify atomizers appropriate for successful in-duct injection of humidification water and lime slurries. The purpose of this program was to identify and quantify atomizer spray and performance criteria that affect the operations and reliability of the in-duct SO{sub 2} removal process, and compare commercially available atomizers to these criteria.

  3. Scaleup tests and supporting research for the development of duct injection technology

    SciTech Connect (OSTI)

    Gooch, J.P.; Dismukes, E.B.; Dahlin, R.S.; Faulkner, M.G. (Southern Research Inst., Birmingham, AL (United States)); Klett, M.G.; Buchanan, T.L.; Hunt, J.E. (Gilbert/Commonwealth, Inc., Reading, PA (United States))

    1989-05-01

    Gilbert Commonwealth, Southern Research Institute and the American Electric Power Service Corporation have embarked on a program to convert DOE's Duct Injection Test Facility located at the Muskingum River Power Plant of Ohio Power Company to test alternate duct injection technologies. The technologies to be tested include slurry sorbent injection of hydrated lime using dual fluid nozzles, or a rotary atomizer and pneumatic injection of hydrated lime, with flue gas humidification before or after sorbent injection. The literature review and analysis contained in this report is a part of the preparatory effort for the test program.

  4. Building America Technology Solutions for New and Existing Homes: Duct

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative FuelsofProgram:Y-12Power, IncBioPredicting Envelope LeakageClimate FoundationSealing

  5. Design and development of plugged lactiferous duct treatment technology for nursing women

    E-Print Network [OSTI]

    Mellor, Xochitl L

    2015-01-01

    Plugged lactiferous ducts are a common problem that many nursing women encounter. This occurs when the tissue around a milk duct has become inflamed, thus preventing milk from passing through the duct. Women treat and ...

  6. Technology Solutions Case Study: Apartment Compartmentalization with an Aerosol-Based Sealing Process

    SciTech Connect (OSTI)

    2015-07-01

    Air sealing of building enclosures is a difficult and time-consuming process. Current methods in new construction require laborers to physically locate small and sometimes large holes in multiple assemblies and then manually seal each of them. This research study by Building America team Consortium for Advanced Residential Buildings demonstrated the automated air sealing and compartmentalization of buildings through the use of an aerosolized sealant developed by the Western Cooling Efficiency Center at University of California Davis. CARB demonstrated this new technology application in a multifamily building in Queens, NY. The effectiveness of the sealing process was evaluated by three methods: air leakage testing of overall apartment before and after sealing, point-source testing of individual leaks, and pressure measurements in the walls of the target apartment during sealing. Aerosolized sealing was successful by several measures in this study. Many individual leaks that are labor-intensive to address separately were well sealed by the aerosol particles. In addition, many diffuse leaks that are difficult to identify and treat were also sealed. The aerosol-based sealing process resulted in an average reduction of 71% in air leakage across three apartments and an average apartment airtightness of 0.08 CFM50/SF of enclosure area.

  7. Scaleup tests and supporting research for the development of duct injection technology. Topical report No. 1, Literature review

    SciTech Connect (OSTI)

    Gooch, J.P.; Dismukes, E.B.; Dahlin, R.S.; Faulkner, M.G. [Southern Research Inst., Birmingham, AL (United States); Klett, M.G.; Buchanan, T.L.; Hunt, J.E. [Gilbert/Commonwealth, Inc., Reading, PA (United States)

    1989-05-01

    Gilbert Commonwealth, Southern Research Institute and the American Electric Power Service Corporation have embarked on a program to convert DOE`s Duct Injection Test Facility located at the Muskingum River Power Plant of Ohio Power Company to test alternate duct injection technologies. The technologies to be tested include slurry sorbent injection of hydrated lime using dual fluid nozzles, or a rotary atomizer and pneumatic injection of hydrated lime, with flue gas humidification before or after sorbent injection. The literature review and analysis contained in this report is a part of the preparatory effort for the test program.

  8. Tags and seals for controling nuclear materials, Arms control and nonproliferation technologies. Second quarter 1993

    SciTech Connect (OSTI)

    Staehle, G; Talaber, C; Stull, S; Moulthrop, P [eds.

    1993-12-31

    This issue of Arms Control and Nonproliferation Technologies summarizes demonstrations and addresses related topics. The first article, ``Basic Nuclear Material Control and Accountability Concepts as Might be Applied to the Uranium from the US-Russian HEU Purchase,`` describes safeguards sybsystems necessary for effective nuclear material safeguards. It also presents a general discussion on HEU-to-low-enrichment uranium (LEU) commingling processes and suggests applicable key measurement points. The second article, ``A Framework for Evaluating Tamper-Indicating-Device Technologies (TIDs),`` describes their uses, proper selection, and evaluation. The final three articles discuss the tags and seals applications and general characteristics of several nuclear material containers: the Type 30B uranium hexafluoride container, the AT-400R container, and the DOT Specification 6M container for SNM. Finally, the Appendix displays short descriptions and illustrations of seven tags and seals, including: the E-cup and wire seal, the python seal, the secure loop inspectable tag/seal (SLITS), bolt-and-loop type electronic identification devices, and the shrink-wrap seal.

  9. In Proc. 1996 ACEEE Summer Study, August 1996, Asilomar, CA. Energy Effectiveness of Duct Sealing and Insulation in Two Multifamily Buildings

    E-Print Network [OSTI]

    Norwalk, Connecticut SYNOPSIS This paper discusses field measurements from five apartments in New York1 LBL# 38538 In Proc. 1996 ACEEE Summer Study, August 1996, Asilomar, CA. Energy Effectiveness that were monitored to determine the effect of duct retrofits on energy use. ABSTRACT Energy losses from

  10. Achieving Airtight Ducts in Manufactured Housing 

    E-Print Network [OSTI]

    McIlvaine, J.; Beal, D.; Moyer, N.; Chasar, D.; Chandra, S.

    2004-01-01

    This Florida Solar Energy Center (FSEC) study, conducted under the auspices of the U.S. Department of Energy's Building America Industrialized Housing Partnership (BAIHP), compares mastic sealed duct systems to tape ...

  11. Technology Solutions Case Study: High-Performance Ducts in Hot-Dry Climates

    SciTech Connect (OSTI)

    M. Hoeschele, A. German, E. Weitzel, R. Chitwood

    2015-08-01

    Ducts in conditioned space (DCS) represent a high priority measure for moving the next generation of new homes to the Zero Net Energy performance level. Various strategies exist for incorporating ducts within the conditioned thermal envelope. To support this activity, in 2013 the Pacific Gas & Electric Company initiated a project with Davis Energy Group (lead for the Building America team, Alliance for Residential Building Innovation) to solicit builder involvement in California to participate in field demonstrations of various DCS strategies. Builders were given incentives and design support in exchange for providing site access for construction observation, diagnostic testing, and builder survey feedback. Information from the project was designed to feed into California's 2016 Title 24 process, but also to serve as an initial mechanism to engage builders in more high performance construction strategies. This Building America project complemented information collected in the California project with BEopt simulations of DCS performance in hot/dry climate regions.

  12. Scaleup tests and supporting research for the development of duct injection technology

    SciTech Connect (OSTI)

    Felix, L.G.; Dismukes, E.B.; Gooch, J.P. (Southern Research Inst., Birmingham, AL (United States)); Klett, M.G.; Demian, A.G. (Gilbert/Commonwealth, Inc., Reading, PA (United States))

    1992-04-20

    This Topical Report No. 2 is an interim report on the Duct Injection Test Facility being operated for the Department of Energy at Beverly, Ohio. Either dry calcium hydroxide or an aqueous slurry of calcium hydroxide (prepared by slaking quicklime) is injected into a slipstream of flue gas to achieve partial removal of SO{sub 2} from a coal-burning power station. Water injected with the slurry or injected separately from the dry sorbents cools the flue gas and increases the water vapor content of the gas. The addition of water, either in the slurry or in a separate spray, makes the extent of reaction between the sorbent and the SO{sub 2} more complete; the presumption is that water is effective in the liquid state, when it is able to wet the sorbent particles physically, and not especially effective in the vapor state. An electrostatic precipitator collects the combination of suspended solids (fly ash from the boiler and sorbent from the duct injection process). All of the operations are being carried out on the scale of approximately 50,000 acfm of flue gas.

  13. Technology Solutions Case Study: Raised Ceiling Interior Duct System, New Smyrna, Florida

    SciTech Connect (OSTI)

    2014-09-01

    Builder S.E. Volusia County Habitat for Humanity (SEVHFH) was interested in constructing a home to the new U.S. Department of Energy (DOE) Zero Energy Ready Home standards. SEVHFH partners with DOE team Building America Partnership for Improved Residential Construction on Habitat for Humanity homes and routinely builds to ENERGY STAR V3.1. The only modification to the design needed to comply with the Zero Energy Ready Home criteria was the interior duct requirement. Unwilling to incur the added costs of a foam roof deck or wall heights that exceed 8 ft to accommodate a fur-down chase, SEVHFH opted to build a fur-up or raised ceiling chase. This case study describes the project.

  14. Building America Case Study: Apartment Compartmentalization with an Aerosol-Based Sealing Process - Queens, NY; Technology Solutions for New and Existing Homes, Energy Efficiency & Renewable Energy (EERE)

    SciTech Connect (OSTI)

    2015-07-01

    Air sealing of building enclosures is a difficult and time-consuming process. Current methods in new construction require laborers to physically locate small and sometimes large holes in multiple assemblies and then manually seal each of them. The innovation demonstrated under this research study was the automated air sealing and compartmentalization of buildings through the use of an aerosolized sealant, developed by the Western Cooling Efficiency Center at University of California Davis.
    CARB sought to demonstrate this new technology application in a multifamily building in Queens, NY. The effectiveness of the sealing process was evaluated by three methods: air leakage testing of overall apartment before and after sealing, point-source testing of individual leaks, and pressure measurements in the walls of the target apartment during sealing. Aerosolized sealing was successful by several measures in this study. Many individual leaks that are labor-intensive to address separately were well sealed by the aerosol particles. In addition, many diffuse leaks that are difficult to identify and treat were also sealed. The aerosol-based sealing process resulted in an average reduction of 71% in air leakage across three apartments and an average apartment airtightness of 0.08 CFM50/SF of enclosure area.

  15. Duct Leakage Impacts on Airtightness, Infiltration, and Peak Electrical Demand in Florida Homes 

    E-Print Network [OSTI]

    Cummings, J. B.; Tooley, J. J.; Moyer, N.

    1990-01-01

    (ACHSO). When the duct registers were sealed, ACHSO decreased to 11.04, indicating that 12.2% of the house leaks were in the duct system. Duct leaks have a dramatic impact upon peak electrical demand. Based on theoretical analysis, a fifteen percent...

  16. Duct/Air sealing | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX E LISTStar2-0057-EA Jump to:of the National ClimateDongyingOpen Energy3)

  17. Infected thyroglossal duct cyst.

    E-Print Network [OSTI]

    Deaver, MJ; Silman, EF; Lotfipour, S

    2009-01-01

    Som P. CT of Thyroglossal Duct Cysts. Radiology. 1985; 157:edicine Infected Thyroglossal Duct Cyst Mark J. Deaver, MD,of infected thyroglossal duct cyst was made. The patient was

  18. Building America Best Practices Series, Volume 10: Retrofit Techniques and Technologies: Air Sealing

    SciTech Connect (OSTI)

    Baechler, Michael C.; Gilbride, Theresa L.; Hefty, Marye G.; Cole, Pamala C.; Williamson, Jennifer L.; Love, Pat M.

    2010-04-12

    This report was prepared by PNNL for the U.S. Department of Energy Building America Program. The report provides information to home owners who want to make their existing homes more energy efficient by sealing leaks in the building envelope (ceiling, walls, and floors) that let in drafts and let conditioned air escape. The report provides descriptions of 19 key areas of the home where air sealing can improve home performance and energy efficiency. The report includes suggestions on how to find a qualified weatherization or home performance contractor, what to expect in a home energy audit, opportune times for performing air sealing, and what safety and health concerns to be aware of. The report describes some basic building science concepts and topics related to air sealing including ventilation, diagnostic tools, and code requirements. The report will be available for free download from the DOE Building America website. It is a suitable consumer education tool for home performance and weatherization contractors to share with customers to describe the process and value of home energy retrofits.

  19. Floating seal system for rotary devices

    DOE Patents [OSTI]

    Banasiuk, H.A.

    1983-08-23

    This invention relates to a floating seal system for rotary devices to reduce gas leakage around the rotary device in a duct and across the face of the rotary device to an adjacent duct. The peripheral seal bodies are made of resilient material having a generally U-shaped cross section wherein one of the legs is secured to a support member and the other of the legs forms a contacting seal against the rotary device. The legs of the peripheral seal form an extended angle of intersection of about 10[degree] to about 30[degree] in the unloaded condition to provide even sealing forces around the periphery of the rotary device. The peripheral seal extends around the periphery of the support member except where intersected by radial seals which reduce gas leakage across the face of the rotary device and between adjacent duct portions. The radial seal assembly is fabricated from channel bars, the smaller channel bar being secured to the divider of the support member and a larger inverted rigid floating channel bar having its legs freely movable over the legs of the smaller channel bar forming therewith a tubular channel. A resilient flexible tube is positioned within the tubular channel for substantially its full length to reduce gas leakage across the tubular channel. A spacer extends beyond the face of the floating channel near each end of the floating channel a distance to provide desired clearance between the floating channel and the face of the rotary device. 5 figs.

  20. Sealing device

    DOE Patents [OSTI]

    Garcia-Crespo, Andres Jose

    2013-12-10

    A sealing device for sealing a gap between a dovetail of a bucket assembly and a rotor wheel is disclosed. The sealing device includes a cover plate configured to cover the gap and a retention member protruding from the cover plate and configured to engage the dovetail. The sealing device provides a seal against the gap when the bucket assemply is subjected to a centrifugal force.

  1. Geopolymer Sealing Materials

    Broader source: Energy.gov [DOE]

    DOE Geothermal Peer Review 2010 - Presentation. Project objectives: Develop and characterize field-applicable geopolymer temporary sealing materials in the laboratory and to transfer this developed material technology to geothermal drilling service companies as collaborators for field validation tests.

  2. Particle deposition in ventilation ducts

    E-Print Network [OSTI]

    Sippola, Mark R.

    2002-01-01

    M. and Wang, D. (1999) Duct systems in large commercialin ventilation air supply ducts. Proceedings of Indoor Air ‘filtration efficiency of in-duct ventilation air cleaners.

  3. DOUBLE DUCTED FAN (DDF) Cengiz Camci and Ali Akturk

    E-Print Network [OSTI]

    Camci, Cengiz

    DOUBLE DUCTED FAN (DDF) By Cengiz Camci and Ali Akturk A technology description document a novel ducted fan inlet flow conditioning concept that will significantly improve the performance" and many other ducted fan based systems. The new concept that will significantly reduce the inlet lip

  4. Sealed Combustion

    SciTech Connect (OSTI)

    2009-05-12

    This information sheet discusses the benefits of sealed combustion appliance units in order to ensure good indoor air quality.

  5. Security seal

    DOE Patents [OSTI]

    Gobeli, Garth W. (Albuquerque, NM)

    1985-01-01

    Security for a package or verifying seal in plastic material is provided by a print seal with unique thermally produced imprints in the plastic. If tampering is attempted, the material is irreparably damaged and thus detectable. The pattern of the imprints, similar to "fingerprints" are recorded as a positive identification for the seal, and corresponding recordings made to allow comparison. The integrity of the seal is proved by the comparison of imprint identification records made by laser beam projection.

  6. Conformable seal

    DOE Patents [OSTI]

    Neef, W.S.; Lambert, D.R.

    1982-08-10

    Sealing apparatus and method, comprising first and second surfaces or membranes, at least one of which surfaces is deformable, placed in proximity to one another. Urging means cause these surfaces to contact one another in a manner such that the deformable surface deforms to conform to the geometry of the other surface, thereby creating a seal. The seal is capable of undergoing multiple cycles of sealing and unsealing.

  7. Duct and Blower Section 

    E-Print Network [OSTI]

    Unknown

    2011-08-17

    The deflection of a spiral duct depends on its flat span, gauge, pressure, and reinforcement. Furthermore, the duct weight determines the cost of installation, not only in material costs but also labor, which is bid by the duct weight. The current...

  8. Advanced CO2 Leakage Mitigation using Engineered Biomineralization Sealing Technologies

    SciTech Connect (OSTI)

    Spangler, Lee; Cunningham, Alfred; Phillips, Adrienne

    2015-03-31

    This research project addresses one of the goals of the DOE Carbon Sequestration Program (CSP). The CSP core R&D effort is driven by technology and is accomplished through laboratory and pilot scale research aimed at new technologies for greenhouse gas mitigation. Accordingly, this project was directed at developing novel technologies for mitigating unwanted upward leakage of carbon dioxide (CO2) injected into the subsurface as part of carbon capture and storage (CCS) activities. The technology developed by way of this research project is referred to as microbially induced calcite precipitation (MICP).

  9. Building America Technology Solutions for New and Existing Homes...

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

    buried andor encapsulated ducts to reduce duct thermal losses in existing homes. Technology Solutions Case Study: Buried and Encapsulated Ducts More Documents & Publications...

  10. Seal arrangement

    DOE Patents [OSTI]

    Lundholm, Gunnar (Lund, SE)

    1987-01-01

    A seal arrangement is provided for preventing gas leakage along a reciprocating piston rod or other reciprocating member passing through a wall which separates a high pressure gas chmber and a low pressure gas chamber. Liquid lubricant is applied to the lower pressure side of a sealing gland surrounding the piston rod to prevent the escape of gas between the rod and the gland. The sealing gland is radially forced against the piston rod by action of a plurality of axially stacked O-rings influenced by an axially acting spring as well as pressure from the gas.

  11. Building America Technology Solutions for New and Existing Homes: New Insights for Improving the Designs of Flexible Duct Junction Boxes (Fact Sheet)

    Office of Energy Efficiency and Renewable Energy (EERE)

    IBACOS explored the relationships between pressure and physical configurations of flexible duct junction boxes by using computational fluid dynamics simulations to predict individual box parameters and total system pressure, thereby ensuring improved HVAC performance.

  12. System Seal 

    E-Print Network [OSTI]

    Unknown

    2011-08-17

    In Squeeze Film Dampers, (SFD), grooves (deep or shallow) are used to feed oil into the damper and prevent oil starvation within the fluid film lands. In oil seals with film land of clearance c, short shallow grooves (depth ...

  13. Refractory Glass Seals for SOFC

    SciTech Connect (OSTI)

    Chou, Y. S.; Stevenson, Jeffry W.

    2011-07-01

    One of the critical challenges facing planar solid oxide fuel cell (SOFC) technology is the need for reliable sealing technology. Seals must exhibit long-term stability and mechanical integrity in the high temperature SOFC environment during normal and transient operation. Several different approaches for sealing SOFC stacks are under development, including glass or glass-ceramic seals, metallic brazes, and compressive seals. Among glass seals, rigid glass-ceramics, self-healing glass, and composite glass approaches have been investigated under the SECA Core Technology Program. The U.S. Department of Energy's Pacific Northwest National Laboratory (PNNL) has developed the refractory glass approach in light of the fact that higher sealing temperatures (e.g., 930-1000 degrees C) may enhance the ultimate in-service bulk strength and electrical conductivity of contact materials, as well as the bonding strength between contact materials and adjacent SOFC components, such as interconnect coatings and electrodes. This report summarizes the thermal, chemical, mechanical, and electrical properties of the refractory sealing glass.

  14. Scaleup tests and supporting research for the development of duct injection technology. Topical report No. 2, Task 3.1: Evaluation of system performance, Duct Injection Test Facility, Muskingum River Power Plant, Beverly, Ohio

    SciTech Connect (OSTI)

    Felix, L.G.; Dismukes, E.B.; Gooch, J.P. [Southern Research Inst., Birmingham, AL (United States); Klett, M.G.; Demian, A.G. [Gilbert/Commonwealth, Inc., Reading, PA (United States)

    1992-04-20

    This Topical Report No. 2 is an interim report on the Duct Injection Test Facility being operated for the Department of Energy at Beverly, Ohio. Either dry calcium hydroxide or an aqueous slurry of calcium hydroxide (prepared by slaking quicklime) is injected into a slipstream of flue gas to achieve partial removal of SO{sub 2} from a coal-burning power station. Water injected with the slurry or injected separately from the dry sorbents cools the flue gas and increases the water vapor content of the gas. The addition of water, either in the slurry or in a separate spray, makes the extent of reaction between the sorbent and the SO{sub 2} more complete; the presumption is that water is effective in the liquid state, when it is able to wet the sorbent particles physically, and not especially effective in the vapor state. An electrostatic precipitator collects the combination of suspended solids (fly ash from the boiler and sorbent from the duct injection process). All of the operations are being carried out on the scale of approximately 50,000 acfm of flue gas.

  15. The Duct Tape of Computer

    E-Print Network [OSTI]

    Sherwood, Tim

    AWK: The Duct Tape of Computer Science Research Tim Sherwood UC Santa Barbara #12;AWK - Sherwood 2 Duct Tape Systems Research Environment · Lots of simulators, data, and analysis tools · Since it is research, nothing works together Unix pipes are the ducts Awk is the duct tape · It's not the "best" way

  16. Modeling particle loss in ventilation ducts

    E-Print Network [OSTI]

    Sippola, Mark R.; Nazaroff, William W.

    2003-01-01

    particles in turbulent duct flows. Chemical EngineeringDeposition in Ventilation Ducts. Ph.D. Dissertation,Deposition in Ventilating Duct Systems. Ph.D. Dissertation,

  17. Modeling particle loss in ventilation ducts

    E-Print Network [OSTI]

    Sippola, M R; Nazaroff, William W

    2003-01-01

    m) (c) 85% ASHRAE filters at air intake high-loss ducts low-loss ducts fractional fate (-) exhausted indoors indoorssurface deposition supply & return duct deposition filtered

  18. Atypical presentation of an omphalomesenteric duct cyst

    E-Print Network [OSTI]

    Ballester, Irene; Betlloch, Isabel; Pérez-Crespo, María; Toledo, Fernando; Cuesta, Laura

    2009-01-01

    KW, Grosfeld JL. Vitelline duct anomalies. Experience withof the omphalomesenteric duct. Childhood differentialof an omphalomesenteric duct cyst Irene Ballester MD, Isabel

  19. Modeling, Control, and Flight Testing of a Small Ducted Fan Aircraft

    E-Print Network [OSTI]

    Johnson, Eric N.

    1 Modeling, Control, and Flight Testing of a Small Ducted Fan Aircraft Eric N. Johnson* and Michael A. Turbe Georgia Institute of Technology, Atlanta, GA, 30332 Small ducted fan autonomous vehicles for the GTSpy, a small ducted fan autonomous vehicle based on the Micro Autonomous Systems' Helispy

  20. LBNL -53547 Advanced Duct Sealant Testing

    E-Print Network [OSTI]

    for Energy Efficiency and Renewable Energy, Office of Building Technology, State and Community Programs: Philip Spartz PIER Program Area: Buildings End Use Energy Efficiency PIER Program Area Lead: Nancy contributes to the Buildings End-Use Energy Efficiency program. 4 #12;Executive Summary Duct leakage has been

  1. Measure Guideline: Buried and/or Encapsulated Ducts

    SciTech Connect (OSTI)

    Shapiro, C.; Zoeller, W.; Mantha, P.

    2013-08-01

    Buried and/or encapsulated ducts (BEDs) are a class of advanced, energy-efficiency strategies intended to address the significant ductwork thermal losses associated with ducts installed in unconditioned attics. BEDs are ducts installed in unconditioned attics that are covered in loose-fill insulation and/or encapsulated in closed cell polyurethane spray foam insulation. This Measure Guideline covers the technical aspects of BEDs as well as the advantages, disadvantages, and risks of BEDs compared to other alternative strategies. This guideline also provides detailed guidance on installation of BEDs strategies in new and existing homes through step-by-step installation procedures. This Building America Measure Guideline synthesizes previously published research on BEDs and provides practical information to builders, contractors, homeowners, policy analysts, building professions, and building scientists. Some of the procedures presented here, however, require specialized equipment or expertise. In addition, some alterations to duct systems may require a specialized license. Persons implementing duct system improvements should not go beyond their expertise or qualifications. This guideline provides valuable information for a building industry that has struggled to address ductwork thermal losses in new and existing homes. As building codes strengthen requirements for duct air sealing and insulation, flexibility is needed to address energy efficiency goals. While ductwork in conditioned spaces has been promoted as the panacea for addressing ductwork thermal losses, BEDs installations approach - and sometimes exceed - the performance of ductwork in conditioned spaces.

  2. Fundamental investigation of duct/ESP phenomena

    SciTech Connect (OSTI)

    Brown, C.A. (Radian Corp., Austin, TX (United States)); Durham, M.D. (ADA Technologies, Inc., Englewood, CO (United States)); Sowa, W.A. (California Univ., Irvine, CA (United States). Combustion Lab.); Himes, R.M. (Fossil Energy Research Corp., Laguna Hills, CA (United States)); Mahaffey, W.A. (CHAM of North America, Inc., Huntsville, AL (United States))

    1991-10-21

    Radian Corporation was contracted to investigate duct injection and ESP phenomena in a 1.7 MW pilot plant constructed for this test program. This study was an attempt to resolve problems found in previous studies and answer remaining questions for the technology using an approach which concentrates on the fundamental mechanisms of the process. The goal of the study was to obtain a better understanding of the basic physical and chemical phenomena that control: (1) the desulfurization of flue gas by calcium-based reagent, and (2) the coupling of an existing ESP particulate collection device to the duct injection process. Process economics are being studied by others. (VC)

  3. Particle deposition in ventilation ducts

    SciTech Connect (OSTI)

    Sippola, Mark R.

    2002-09-01

    Exposure to airborne particles is detrimental to human health and indoor exposures dominate total exposures for most people. The accidental or intentional release of aerosolized chemical and biological agents within or near a building can lead to exposures of building occupants to hazardous agents and costly building remediation. Particle deposition in heating, ventilation and air-conditioning (HVAC) systems may significantly influence exposures to particles indoors, diminish HVAC performance and lead to secondary pollutant release within buildings. This dissertation advances the understanding of particle behavior in HVAC systems and the fates of indoor particles by means of experiments and modeling. Laboratory experiments were conducted to quantify particle deposition rates in horizontal ventilation ducts using real HVAC materials. Particle deposition experiments were conducted in steel and internally insulated ducts at air speeds typically found in ventilation ducts, 2-9 m/s. Behaviors of monodisperse particles with diameters in the size range 1-16 {micro}m were investigated. Deposition rates were measured in straight ducts with a fully developed turbulent flow profile, straight ducts with a developing turbulent flow profile, in duct bends and at S-connector pieces located at duct junctions. In straight ducts with fully developed turbulence, experiments showed deposition rates to be highest at duct floors, intermediate at duct walls, and lowest at duct ceilings. Deposition rates to a given surface increased with an increase in particle size or air speed. Deposition was much higher in internally insulated ducts than in uninsulated steel ducts. In most cases, deposition in straight ducts with developing turbulence, in duct bends and at S-connectors at duct junctions was higher than in straight ducts with fully developed turbulence. Measured deposition rates were generally higher than predicted by published models. A model incorporating empirical equations based on the experimental measurements was applied to evaluate particle losses in supply and return duct runs. Model results suggest that duct losses are negligible for particle sizes less than 1 {micro}m and complete for particle sizes greater than 50 {micro}m. Deposition to insulated ducts, horizontal duct floors and bends are predicted to control losses in duct systems. When combined with models for HVAC filtration and deposition to indoor surfaces to predict the ultimate fates of particles within buildings, these results suggest that ventilation ducts play only a small role in determining indoor particle concentrations, especially when HVAC filtration is present. However, the measured and modeled particle deposition rates are expected to be important for ventilation system contamination.

  4. Duct leakage impacts on VAV system performance in California large commercial buildings

    SciTech Connect (OSTI)

    Wray, Craig P.; Matson, Nance E.

    2003-10-01

    The purpose of this study is to evaluate the variability of duct leakage impacts on air distribution system performance for typical large commercial buildings in California. Specifically, a hybrid DOE-2/TRNSYS sequential simulation approach was used to model the energy use of a low-pressure terminal-reheat variable-air-volume (VAV) HVAC system with six duct leakage configurations (tight to leaky) in nine prototypical large office buildings (representing three construction eras in three California climates where these types of buildings are common). Combined fan power for the variable-speed-controlled supply and return fans at design conditions was assumed to be 0.8 W/cfm. Based on our analyses of the 54 simulation cases, the increase in annual fan energy is estimated to be 40 to 50% for a system with a total leakage of 19% at design conditions compared to a tight system with 5% leakage. Annual cooling plant energy also increases by about 7 to 10%, but reheat energy decreases (about 3 to 10%). In combination, the increase in total annual HVAC site energy is 2 to 14%. The total HVAC site energy use includes supply and return fan electricity consumption, chiller and cooling tower electricity consumption, boiler electricity consumption, and boiler natural gas consumption. Using year 2000 average commercial sector energy prices for California ($0.0986/kWh and $7.71/Million Btu), the energy increases result in 9 to 18% ($7,400 to $9,500) increases in HVAC system annual operating costs. Normalized by duct surface area, the increases in annual operating costs are 0.14 to 0.18 $/ft{sup 2}. Using a suggested one-time duct sealing cost of $0.20 per square foot of duct surface area, these results indicate that sealing leaky ducts in VAV systems has a simple payback period of about 1.3 years. Even with total leakage rates as low as 10%, duct sealing is still cost effective. This suggests that duct sealing should be considered at least for VAV systems with 10% or more total duct leakage. The VAV system that we simulated had perfectly insulated ducts, and maintained constant static pressure in the ducts upstream of the VAV boxes and a constant supply air temperature at the airhandler. Further evaluations of duct leakage impacts should be carried out in the future after methodologies are developed to deal with duct surface heat transfer effects, to deal with airflows entering VAV boxes from ceiling return plenums (e.g., to model parallel fan-powered VAV boxes), and to deal with static pressure reset and supply air temperature reset strategies.

  5. Ducts in Conditioned Space - Building America Top Innovation | Department

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:FinancingPetroleum Based| Department8,Department of2 FederalEnergyDucts Sealing Using

  6. Duct Leakage Repeatability Testing

    SciTech Connect (OSTI)

    Walker, Iain; Sherman, Max

    2014-08-01

    The purpose of this report is to evaluate the repeatability of the three most significant measurement techniques for duct leakage using data from the literature and recently obtained field data. We will also briefly discuss the first two factors. The main question to be answered by this study is to determine if differences in the repeatability of these tests methods is sufficient to indicate that any of these methods is so poor that it should be excluded from consideration as an allowed procedure in codes and standards. The three duct leak measurement methods assessed in this report are the two duct pressurization methods that are commonly used by many practitioners and the DeltaQ technique. These are methods B, C and A, respectively of the ASTM E1554 standard. Although it would be useful to evaluate other duct leak test methods, this study focused on those test methods that are commonly used and are required in various test standards, such as BPI (2010), RESNET (2014), ASHRAE 62.2 (2013), California Title 24 (CEC 2012), DOE Weatherization and many other energy efficiency programs.

  7. Building America Case Study: High Performance Ducts in Hot-Dry...

    Office of Scientific and Technical Information (OSTI)

    Ducts in Hot-Dry Climates; Technology Solutions for New and Existing Homes, Energy Efficiency & Renewable Energy (EERE) Citation Details In-Document Search Title: Building...

  8. 11th AIAA/CEAS Aeroacoustics Conference, 23-25 May 2005, Monterey, CA, USA Acoustic Modes in a Ducted Shear Flow

    E-Print Network [OSTI]

    Rienstra, Sjoerd W.

    in a Ducted Shear Flow Gregory Vilenski Sjoerd W. Rienstra Eindhoven University of Technology, 5600 MB inside a duct is considered. For isentropic flow in a circular duct with zero swirl and constant mean on the coordinate axes x,r and , p = density and pressure s = tip-to-hub ratio h = dimensional inner duct radius d

  9. Regenerator seal

    DOE Patents [OSTI]

    Davis, Leonard C. (Indianapolis, IN); Pacala, Theodore (Indianapolis, IN); Sippel, George R. (Indianapolis, IN)

    1981-01-01

    A method for manufacturing a hot side regenerator cross arm seal assembly having a thermally stablilized wear coating with a substantially flat wear surface thereon to seal between low pressure and high pressure passages to and from the hot inboard side of a rotary regenerator matrix includes the steps of forming a flat cross arm substrate member of high nickel alloy steel; fixedly securing the side edges of the substrate member to a holding fixture with a concave surface thereacross to maintain the substrate member to a slightly bent configuration on the fixture surface between the opposite ends of the substrate member to produce prestress therein; applying coating layers on the substrate member including a wear coating of plasma sprayed nickel oxide/calcium flouride material to define a wear surface of slightly concave form across the restrained substrate member between the free ends thereon; and thereafter subjecting the substrate member and the coating thereon to a heat treatment of 1600.degree. F. for sixteen hours to produce heat stabilizing growth in the coating layers on the substrate member and to produce a thermally induced growth stress in the wear surface that substantially equalizes the prestress in the substrate whereby when the cross arm is removed from the fixture surface following the heat treatment step a wear face is formed on the cross arm assembly that will be substantially flat between the ends.

  10. Triple acting radial seal

    DOE Patents [OSTI]

    Ebert, Todd A (West Palm Beach, FL); Carella, John A (Jupiter, FL)

    2012-03-13

    A triple acting radial seal used as an interstage seal assembly in a gas turbine engine, where the seal assembly includes an interstage seal support extending from a stationary inner shroud of a vane ring, the interstage seal support includes a larger annular radial inward facing groove in which an outer annular floating seal assembly is secured for radial displacement, and the outer annular floating seal assembly includes a smaller annular radial inward facing groove in which an inner annular floating seal assembly is secured also for radial displacement. A compliant seal is secured to the inner annular floating seal assembly. The outer annular floating seal assembly encapsulates the inner annular floating seal assembly which is made from a very low alpha material in order to reduce thermal stress.

  11. Sealing Ducts in Large Commercial Buildings with Aerosolized Sealant Particles

    E-Print Network [OSTI]

    2001-01-01

    Summer Study on Energy Efficiency in Buildings, 9:195-203.Summer Study on Energy Efficiency in Buildings, 1: 147-155.

  12. Duct System Flammability and Air Sealing Fire Separation Assemblies...

    Office of Scientific and Technical Information (OSTI)

    Fire Separation Assemblies in the International Residential Code Rudd, A.; Prahl, D. 32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; RESIDENTIAL BUILDINGS; AIRTIGHTNESS;...

  13. List of Duct/Air sealing Incentives | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIXsource History ViewInformationWindsCompressed air Incentives JumpDishwasherList

  14. Remote Duct Sealing in Residential and Commercial Buildings | Department of

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative FuelsofProgram: Report Appendices |ProjectKnowRedoxRelated Links RelatedEnergy

  15. LBNL -45423 Stopping Duct Quacks: Longevity of

    E-Print Network [OSTI]

    LBNL - 45423 Stopping Duct Quacks: Longevity of Residential Duct Sealants Max H. Sherman, Iain S Duct leakage has been identified as a major source of energy loss in residential buildings. Most duct leakage occurs at the connections to registers, plenums or branches in the duct system. At each

  16. Turbine disc sealing assembly

    DOE Patents [OSTI]

    Diakunchak, Ihor S.

    2013-03-05

    A disc seal assembly for use in a turbine engine. The disc seal assembly includes a plurality of outwardly extending sealing flange members that define a plurality of fluid pockets. The sealing flange members define a labyrinth flow path therebetween to limit leakage between a hot gas path and a disc cavity in the turbine engine.

  17. Mechanical seal assembly

    DOE Patents [OSTI]

    Kotlyar, Oleg M. (Salt Lake City, UT)

    2002-01-01

    An improved mechanical seal assembly is provided for sealing rotating shafts with respect to their shaft housings, wherein the rotating shafts are subject to substantial axial vibrations. The mechanical seal assembly generally includes a rotating sealing ring fixed to the shaft, a non-rotating sealing ring adjacent to and in close contact with the rotating sealing ring for forming an annular seal about the shaft, and a mechanical diode element that applies a biasing force to the non-rotating sealing ring by means of hemispherical joint. The alignment of the mechanical diode with respect to the sealing rings is maintained by a series of linear bearings positioned axially along a desired length of the mechanical diode. Alternative embodiments include mechanical or hydraulic amplification components for amplifying axial displacement of the non-rotating sealing ring and transfering it to the mechanical diode.

  18. Mechanical seal assembly

    DOE Patents [OSTI]

    Kotlyar, Oleg M. (Salt Lake City, UT)

    2001-01-01

    An improved mechanical seal assembly is provided for sealing rotating shafts with respect to their shaft housings, wherein the rotating shafts are subject to substantial axial vibrations. The mechanical seal assembly generally includes a rotating sealing ring fixed to the shaft, a non-rotating sealing ring adjacent to and in close contact with the rotating sealing ring for forming an annular seal about the shaft, and a mechanical diode element that applies a biasing force to the non-rotating sealing ring by means of hemispherical joint. The alignment of the mechanical diode with respect to the sealing rings is maintained by a series of linear bearings positioned axially along a desired length of the mechanical diode. Alternative embodiments include mechanical or hydraulic amplification components for amplifying axial displacement of the non-rotating sealing ring and transferring it to the mechanical diode.

  19. Rotary shaft sealing assembly

    DOE Patents [OSTI]

    Dietle, Lannie L. (Houston, TX); Schroeder, John E. (Richmond, TX); Kalsi, Manmohan S. (Houston, TX); Alvarez, Patricio D. (Richmond, TX)

    2010-09-21

    A rotary shaft sealing assembly in which a first fluid is partitioned from a second fluid in a housing assembly having a rotary shaft located at least partially within. In one embodiment a lip seal is lubricated and flushed with a pressure-generating seal ring preferably having an angled diverting feature. The pressure-generating seal ring and a hydrodynamic seal may be used to define a lubricant-filled region with each of the seals having hydrodynamic inlets facing the lubricant-filled region. Another aspect of the sealing assembly is having a seal to contain pressurized lubricant while withstanding high rotary speeds. Another rotary shaft sealing assembly embodiment includes a lubricant supply providing a lubricant at an elevated pressure to a region between a lip seal and a hydrodynamic seal with a flow control regulating the flow of lubricant past the lip seal. The hydrodynamic seal may include an energizer element having a modulus of elasticity greater than the modulus of elasticity of a sealing lip of the hydrodynamic seal.

  20. Rotary shaft sealing assembly

    DOE Patents [OSTI]

    Dietle, Lannie L; Schroeder, John E; Kalsi, Manmohan S; Alvarez, Patricio D

    2013-08-13

    A rotary shaft sealing assembly in which a first fluid is partitioned from a second fluid in a housing assembly having a rotary shaft located at least partially within. In one embodiment a lip seal is lubricated and flushed with a pressure-generating seal ring preferably having an angled diverting feature. The pressure-generating seal ring and a hydrodynamic seal may be used to define a lubricant-filled region with each of the seals having hydrodynamic inlets facing the lubricant-filled region. Another aspect of the sealing assembly is having a seal to contain pressurized lubricant while withstanding high rotary speeds. Another rotary shaft sealing assembly embodiment includes a lubricant supply providing a lubricant at an elevated pressure to a region between a lip seal and a hydrodynamic seal with a flow control regulating the flow of lubricant past the lip seal. The hydrodynamic seal may include an energizer element having a modulus of elasticity greater than the modulus of elasticity of a sealing lip of the hydrodynamic seal.

  1. MHD duct flows under hydrodynamic “slip” condition

    E-Print Network [OSTI]

    Smolentsev, S.

    2009-01-01

    two-dimensional turbulence in MHD duct ?ows, CTR, Stanfordow in rectangular ducts. J. Fluid Mech. 21, 577–590 (1965)C L E S. Smolentsev MHD duct ?ows under hydrodynamic “slip”

  2. Building America Technology Solutions for New and Existing Homes...

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

    Interior Duct System - New Smyrna, Florida More Documents & Publications Building America Technology Solutions for New and Existing Homes: Duct in Conditioned Space in a Dropped...

  3. Inboard seal mounting

    DOE Patents [OSTI]

    Hayes, John R. (Indianapolis, IN)

    1983-01-01

    A regenerator assembly for a gas turbine engine has a hot side seal assembly formed in part by a cast metal engine block having a seal recess formed therein that is configured to supportingly receive ceramic support blocks including an inboard face thereon having a regenerator seal face bonded thereto. A pressurized leaf seal is interposed between the ceramic support block and the cast metal engine block to bias the seal wear face into sealing engagement with a hot side surface of a rotary regenerator matrix.

  4. Experimental evaluation of pocket damper seals with brush seal elements 

    E-Print Network [OSTI]

    Buchanan, Steven Eugene

    2000-01-01

    The brush hybrid pocket damper seal (BHS) has been proposed to replace a labyrinth seal or pocket damper seal (PDS) in a turbomachine when damping is desired without increased leakage. The BHS and brush-only seal are ...

  5. Labyrinth Seal Leakage Analysis 

    E-Print Network [OSTI]

    Chaudhary, Gaurav

    2012-10-19

    Seals are basic mechanical devices commonly used in machinery to avoid undesired flow losses of working fluids. To understand the working of these seals specifically those placed between relatively moving parts is still ...

  6. Bentonite as a waste isolation pilot plant shaft sealing material

    SciTech Connect (OSTI)

    Daemen, J.; Ran, Chongwei [Univ. of Nevada, Reno, NV (United States)

    1996-12-01

    Current designs of the shaft sealing system for the Waste Isolation Pilot Plant (WIPP) propose using bentonite as a primary sealing component. The shaft sealing designs anticipate that compacted bentonite sealing components can perform through the 10,000-year regulatory period and beyond. To evaluate the acceptability of bentonite as a sealing material for the WIPP, this report identifies references that deal with the properties and characteristics of bentonite that may affect its behavior in the WIPP environment. This report reviews published studies that discuss using bentonite as sealing material for nuclear waste disposal, environmental restoration, toxic and chemical waste disposal, landfill liners, and applications in the petroleum industry. This report identifies the physical and chemical properties, stability and seal construction technologies of bentonite seals in shafts, especially in a saline brine environment. This report focuses on permeability, swelling pressure, strength, stiffness, longevity, and densification properties of bentonites.

  7. Titanium sealing glasses and seals formed therefrom

    DOE Patents [OSTI]

    Brow, Richard K. (Albuquerque, NM); McCollister, Howard L. (Albuquerque, NM); Phifer, Carol C. (Albuquerque, NM); Day, Delbert E. (Rolla, MO)

    1997-01-01

    Alkaline-earth lanthanoborate sealing-glass compositions containing CaO, La.sub.2 O.sub.3, B.sub.2 O.sub.3, TiO.sub.2 and Al.sub.2 O.sub.3 in various combinations of mole-% are provided. These sealing-glass compositions are useful for forming hermetic glass-to-metal seals with titanium and titanium alloys that have a high aqueous durability for component or device applications requiring exposure to moisture, water or body fluids. Particular applications of the titanium sealing-glass compositions include forming glass-to-metal seals for lithium batteries and implanted biomedical devices (e.g. batteries, pacemakers, defibrillators, pumps).

  8. Titanium sealing glasses and seals formed therefrom

    DOE Patents [OSTI]

    Brow, R.K.; McCollister, H.L.; Phifer, C.C.; Day, D.E.

    1997-12-02

    Alkaline-earth lanthanoborate sealing-glass compositions containing CaO, La{sub 2}O{sub 3}, B{sub 2}O{sub 3}, TiO{sub 2} and Al{sub 2}O{sub 3} in various combinations of mole-% are provided. These sealing-glass compositions are useful for forming hermetic glass-to-metal seals with titanium and titanium alloys that have a high aqueous durability for component or device applications requiring exposure to moisture, water or body fluids. Particular applications of the titanium sealing-glass compositions include forming glass-to-metal seals for lithium batteries and implanted biomedical devices (e.g. batteries, pacemakers, defibrillators, pumps). 2 figs.

  9. Security seal. [Patent application

    DOE Patents [OSTI]

    Gobeli, G.W.

    1981-11-17

    Security for a package or verifying seal in plastic material is provided by a print seal with unique thermally produced imprints in the plastic. If tampering is attempted, the material is irreparably damaged and thus detectable. The pattern of the imprints, similar to fingerprints are recorded as a positive identification for the seal, and corresponding recordings made to allow comparison. The integrity of the seal is proved by the comparison of imprint identification records made by laser beam projection.

  10. Skew resisting hydrodynamic seal

    DOE Patents [OSTI]

    Conroy, William T. (Pearland, TX); Dietle, Lannie L. (Sugar Land, TX); Gobeli, Jeffrey D. (Houston, TX); Kalsi, Manmohan S. (Houston, TX)

    2001-01-01

    A novel hydrodynamically lubricated compression type rotary seal that is suitable for lubricant retention and environmental exclusion. Particularly, the seal geometry ensures constraint of a hydrodynamic seal in a manner preventing skew-induced wear and provides adequate room within the seal gland to accommodate thermal expansion. The seal accommodates large as-manufactured variations in the coefficient of thermal expansion of the sealing material, provides a relatively stiff integral spring effect to minimize pressure-induced shuttling of the seal within the gland, and also maintains interfacial contact pressure within the dynamic sealing interface in an optimum range for efficient hydrodynamic lubrication and environment exclusion. The seal geometry also provides for complete support about the circumference of the seal to receive environmental pressure, as compared the interrupted character of seal support set forth in U.S. Pat. Nos. 5,873,576 and 6,036,192 and provides a hydrodynamic seal which is suitable for use with non-Newtonian lubricants.

  11. Duct spinning mode's particle velocity imaging with in-duct circular microphone array

    E-Print Network [OSTI]

    Huang, Xun

    Duct spinning mode's particle velocity imaging with in-duct circular microphone array Qingkai Wei's Republic of China Nowadays, the measurements within a duct have to be conducted using in-duct microphone. In this work, an imaging method of acoustic spinning modes propagating within a circular duct simply

  12. Articulated transition duct in turbomachine

    DOE Patents [OSTI]

    Flanagan, James Scott; McMahan, Kevin Weston; LeBegue, Jeffrey Scott; Pentecost, Ronnie Ray

    2014-04-29

    Turbine systems are provided. A turbine system includes a transition duct comprising an inlet, an outlet, and a duct passage extending between the inlet and the outlet and defining a longitudinal axis, a radial axis, and a tangential axis. The outlet of the transition duct is offset from the inlet along the longitudinal axis and the tangential axis. The duct passage includes an upstream portion and a downstream portion. The upstream portion extends from the inlet between an inlet end and an aft end. The downstream portion extends from the outlet between an outlet end and a head end. The turbine system further includes a joint coupling the aft end of the upstream portion and the head end of the downstream portion together. The joint is configured to allow movement of the upstream portion and the downstream portion relative to each other about or along at least one axis.

  13. Low Cost, Durable Seal

    SciTech Connect (OSTI)

    Roberts, George; Parsons, Jason; Friedman, Jake

    2010-12-17

    Seal durability is critical to achieving the 2010 DOE operational life goals for both stationary and transportation PEM fuel cell stacks. The seal material must be chemically and mechanically stable in an environment consisting of aggressive operating temperatures, humidified gases, and acidic membranes. The seal must also be producible at low cost. Currentlyused seal materials do not meet all these requirements. This project developed and demonstrated a high consistency hydrocarbon rubber seal material that was able to meet the DOE technical and cost targets. Significant emphasis was placed on characterization of the material and full scale molding demonstrations.

  14. Tamper-indicating seal

    DOE Patents [OSTI]

    Fiarman, S.; Degen, M.F.; Peters, H.F.

    1982-08-13

    There is disclosed a tamper-indicating seal that permits in the field inspection and detection of tampering. Said seal comprises a shrinkable tube having a visible pattern of markings which is shrunk over th item to be sealed, and a second transparent tube, having a second visible marking pattern, which is shrunk over the item and the first tube. The relationship between the first and second set of markings produces a pattern so that the seal may not be removed without detection. The seal is particularly applicable to UF/sub 6/ cylinder valves.

  15. Flow duct for nuclear reactors

    DOE Patents [OSTI]

    Straalsund, Jerry L. (Richland, WA)

    1978-01-01

    Improved liquid sodium flow ducts for nuclear reactors are described wherein the improvement comprises varying the wall thickness of each of the walls of a polygonal tubular duct structure so that each of the walls is of reduced cross-section along the longitudinal center line and of a greater cross-section along wall junctions with the other walls to form the polygonal tubular configuration.

  16. Rotary kiln seal

    DOE Patents [OSTI]

    Drexler, Robert L. (Idaho Falls, ID)

    1992-01-01

    A rotary seal used to prevent the escape of contaminates from a rotating kiln incinerator. The rotating seal combines a rotating disc plate which is attached to the rotating kiln shell and four sets of non-rotating carbon seal bars housed in a primary and secondary housing and which rub on the sides of the disc. A seal air system is used to create a positive pressure in a chamber between the primary and secondary seals to create a positive air flow into the contaminated gas chamber. The seal air system also employs an air inlet located between the secondary and tertiary seals to further insure that no contaminates pass the seal and enter the external environment and to provide makeup air for the air which flows into the contaminated gas chamber. The pressure exerted by the seal bars on the rotating disc is controlled by means of a preload spring. The seal is capable of operating in a thermally changing environment where the both radial expansion and axial movement of the rotating kiln do not result in the failure of the seal.

  17. Compliant Glass Seals for SOFC Stacks

    SciTech Connect (OSTI)

    Chou, Y. S.; Choi, Jung-Pyung; Xu, Wei; Stephens, Elizabeth V.; Koeppel, Brian J.; Stevenson, Jeffry W.; Lara-Curzio, Edgar

    2014-04-01

    This report summarizes results from experimental and modeling studies performed by participants in the Solid-State Energy Conversion Alliance (SECA) Core Technology Program, which indicate that compliant glass-based seals offer a number of potential advantages over conventional seals based on de-vitrifying glasses, including reduced stresses during stack operation and thermal cycling, and the ability to heal micro-damage induced during thermal cycling. The properties and composition of glasses developed and/or investigated in these studies are reported, along with results from long-term (up to 5,800h) evaluations of seals based on a compliant glass containing ceramic particles or ceramic fibers.

  18. Case Study of Envelope Sealing in Existing Multiunit Structures

    SciTech Connect (OSTI)

    Dentz, Jordan; Conlin, Francis; Podorson, David

    2012-10-01

    This report describes envelope air sealing that was included in the retrofit of a 244 unit low-rise multifamily housing complex in Durham, N.C. On average, total leakage was reduced by nearly half, from 19.7 ACH50 to 9.4 ACH50. Important air leakage locations identified included plumbing and electrical penetrations, dropped ceilings/soffits, windows, ducts and wall-to-floor intersections. Specifications and a pictorial guide were developed for contractors performing the work.

  19. Compression effects on pressure loss in flexible HVAC ducts

    E-Print Network [OSTI]

    Abushakra, Bass; Walker, Iain S.; Sherman, Max H.

    2002-01-01

    Flow Resistance of HVAC Air Ducts and Fittings. American= pitch of the flexible duct (longitudinal distance between49700. ACCA. 1995. Residential Duct Systems. Manual D. Air

  20. Integrating ducts into the conditioned space: Successes and challenges

    E-Print Network [OSTI]

    Siegel, Jeffrey; Walker, Iain

    2004-01-01

    Improvements from Duct Retrofits on Six Electrically-Heatedal. (2001) Development of a New Duct Leakage Test: Delta Q.Field investigation of duct system performance in California

  1. Buried and Encapsulated Ducts - Building America Top Innovation...

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

    Buried and Encapsulated Ducts - Building America Top Innovation Buried and Encapsulated Ducts - Building America Top Innovation photo of worker blowing insulation on ducts in an...

  2. 16th AIAA/CEAS Aeroacoustics Conference, 7-9 June 2010, Stockholm, Sweden Sound Radiation from a Lined Exhaust Duct

    E-Print Network [OSTI]

    Rienstra, Sjoerd W.

    a Lined Exhaust Duct with Lined Afterbody Ahmet Demir Department of Mathematics, Gebze Institute of Technology Aft fan noise radiating from a lined bypass exhaust duct with lined afterbody is modelled in a way AFT fan noise radiating from the bypass exhaust duct is usually attenuated by acoustic lining along

  3. 12th AIAA/CEAS Aeroacoustics Conference, 8-10 May 2006, Cambridge, MA, USA Sound Radiation from an Annular Duct with Jet Flow

    E-Print Network [OSTI]

    Eindhoven, Technische Universiteit

    an Annular Duct with Jet Flow and a Lined Centerbody A. Demir Eindhoven University of Technology, 5600 MB, The Netherlands. Analytical solutions for the problem of radiation of sound from a duct with flow have been shown of problem parameters and their combinations. I. Introduction THE problem of radiation of sound from a duct

  4. Longevity of Duct Tape in Residential Air Distribution Systems: 1-D, 2-D, and 3-D Joints 

    E-Print Network [OSTI]

    Abushakra, B.

    2003-01-01

    . The study concluded that the duct tape performance in sealing joints depends on the joint's space dimensions; it gets worse as the number of dimensions required to describe the joint increases (1-D to 3-D). This is essentially caused by the shrinkage...

  5. Damped flexible seal

    DOE Patents [OSTI]

    DuBois, Neil J. (Cranston, RI); Amaral, Antonio M. (Barrington, RI)

    1992-10-27

    A damped flexible seal assembly for a torpedo isolates the tailcone thereof rom vibrational energy present in the drive shaft assembly. A pair of outside flanges, each of which include an inwardly facing groove and an O-ring constrained therein, provide a watertight seal against the outer non-rotating surface of the drive shaft assembly. An inside flange includes an outwardly-facing groove and an O-ring constrained therein, and provides a watertight seal against the inner surface of the tail cone. Two cast-in-place elastomeric seals provide a watertight seal between the flanges and further provide a damping barrier between the outside flanges and the inside flanges for damping vibrational energy present in the drive shaft assembly before the energy can reach the tailcone through the seal assembly.

  6. Ultrananocrystalline Diamond (UNCD) Seal Faces | Department of...

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

    Diamond (UNCD) Seal Faces Ultrananocrystalline Diamond (UNCD) Seal Faces New Diamond Coatings Reduce Friction and Improve Performance of Mechanical Seals Mechanical seals are used...

  7. Fundamental investigation of duct/ESP phenomena. Final report

    SciTech Connect (OSTI)

    Brown, C.A. [Radian Corp., Austin, TX (United States); Durham, M.D. [ADA Technologies, Inc., Englewood, CO (United States); Sowa, W.A. [California Univ., Irvine, CA (United States). Combustion Lab.; Himes, R.M. [Fossil Energy Research Corp., Laguna Hills, CA (United States); Mahaffey, W.A. [CHAM of North America, Inc., Huntsville, AL (United States)

    1991-10-21

    Radian Corporation was contracted to investigate duct injection and ESP phenomena in a 1.7 MW pilot plant constructed for this test program. This study was an attempt to resolve problems found in previous studies and answer remaining questions for the technology using an approach which concentrates on the fundamental mechanisms of the process. The goal of the study was to obtain a better understanding of the basic physical and chemical phenomena that control: (1) the desulfurization of flue gas by calcium-based reagent, and (2) the coupling of an existing ESP particulate collection device to the duct injection process. Process economics are being studied by others. (VC)

  8. Liquid zone seal

    DOE Patents [OSTI]

    Klebanoff, Leonard E. (Dublin, CA)

    2001-01-01

    A seal assembly that provides a means for establishing multiple pressure zones within a system. The seal assembly combines a plate extending from the inner wall of a housing or inner enclosure that intersects with and is immersed in the fluid contained in a well formed in a tray contained within the enclosure. The fluid is a low vapor pressure oil, chemically inert and oxidation resistant. The use of a fluid as the sealing component provides a seal that is self-healing and mechanically robust not subject to normal mechanical wear, breakage, and formation of cracks or pinholes and decouples external mechanical vibrations from internal structural members.

  9. Sealing the Deal

    SciTech Connect (OSTI)

    Jones, Anthony M.

    2014-06-01

    Pacific Northwest National Laboratory leveraged simulation to develop an optimized method for inspecting sealed containers in verifying nuclear arms control treaties.

  10. Building America Case Study: High Performance Ducts in Hot-Dry Climates (Fact Sheet), Technology Solutions for New and Existing Homes, Energy Efficiency & Renewable Energy (EERE)

    Office of Scientific and Technical Information (OSTI)

    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 Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefield MunicipalTechnical Report:Speeding accessby a contractorEnergy, science, and technology for--Other:C L

  11. Evaporation Duct Estimation from Clutter Using Meteorological Statistics

    E-Print Network [OSTI]

    Gerstoft, Peter

    Evaporation Duct Estimation from Clutter Using Meteorological Statistics Caglar Yardim*, Peter under duct- ing conditions. Electromagnetic ducts result in non-standard electromagnetic prop- agation addresses how to incorporate meteo- rological statistics into evaporative duct estimation within a Bayesian

  12. Tracking Atmospheric Ducts Using Radar Clutter: I. Evaporation Duct Tracking Using Kalman Filters

    E-Print Network [OSTI]

    Gerstoft, Peter

    Tracking Atmospheric Ducts Using Radar Clutter: I. Evaporation Duct Tracking Using Kalman Filters 92093­0238, USA Introduction This paper addresses the problem of tracking evaporation ducts in marine-standard electromagnetic propagation due to formation of lower atmospheric sea ducts is a common occurrence in maritime

  13. Tracking Atmospheric Ducts Using Radar Clutter: II. Surface-based Duct Tracking Using Multiple Model

    E-Print Network [OSTI]

    Gerstoft, Peter

    Tracking Atmospheric Ducts Using Radar Clutter: II. Surface-based Duct Tracking Using Multiple variability in tracking surface-based ducts in marine and coastal environments. The method tracks of the problem and evaporation duct tracking has been introduced in [1]. In previous studies, atmospheric

  14. Double Ducted Fan (DDF) as a Novel Ducted Fan Inlet Lip Separation Control Device

    E-Print Network [OSTI]

    Camci, Cengiz

    Double Ducted Fan (DDF) as a Novel Ducted Fan Inlet Lip Separation Control Device Ali Akturk computational study of a novel ducted fan inlet flow conditioning concept that will significantly improve the performance and controllability of VTOL UAVs and many other ducted fan based systems. The new concept

  15. Measurements of Smoke Characteristics in HVAC Ducts 

    E-Print Network [OSTI]

    Wolin, Steven D; Ryder, Noah L; Leprince, Frederic; Milke, James; Mowrer, Frederick; Torero, Jose L

    2001-01-01

    The characteristics of smoke traveling in an HVAC duct have been observed along with the response of selected duct smoke detectors. The simulated HVAC system consists of a 9 m long duct, 0.45 m in diameter. An exhaust fan is placed at one end...

  16. Moisture performance of sealed attics in the mixed-humid climate

    SciTech Connect (OSTI)

    Boudreaux, Philip R; Pallin, Simon B; Jackson, Roderick K

    2013-12-01

    Oak Ridge National Laboratory studied 8 homes in the mixed-humid climate, 4 with vented attics and 4 with sealed attics. ORNL wanted to understand the moisture performance of the sealed attic and how it affected the interior environment. We found that the attic and interior of sealed attic homes were more humid than the attic and interior observed in vented attic homes. This is due to the lack of ventilation in the sealed attic. Historically attics have been vented to dehumidify the attic and interior of the home. A sealed attic design greatly reduces the venting potential and thus this drying pathway and can cause elevated interior moisture over a vented attic home. Despite the elevated attic and interior moisture in the sealed attic homes, so far no mold or material degradation has been found. The roof sheathing moisture content has stayed below 20%, indicating low potential for material degradation. Also the relative humidity at the roof sheathing has stayed within the ASHRAE 160 design criteria except for a short time during the 2011/2012 winter. This was due to a combination of the sealed attic design (minimal venting to the outside) and the duct work not being operated in the attic which usually provides a dehumidification pathway. It was also found that when the humidity was controlled using the HVAC system, it resulted in 7% more cooling energy consumption. In the mixed-humid climate this reduces the cost effectiveness of the sealed attic design as a solution for bringing ducts into a semi-conditioned space. Because of this we are recommending the other alternatives be used to bringing ducts into the conditioned space in both new construction and retrofit work in the mixed-humid climate.

  17. Innovative Seals for Solid Oxide Fuel Cells (SOFC)

    SciTech Connect (OSTI)

    Singh, Raj

    2008-06-30

    A functioning SOFC requires different type of seals such as metal-metal, metal-ceramic, and ceramic-ceramic. These seals must function at high temperatures between 600--900{sup o}C and in oxidizing and reducing environments of the fuels and air. Among the different type of seals, the metal-metal seals can be readily fabricated using metal joining, soldering, and brazing techniques. However, the metal-ceramic and ceramic-ceramic seals require significant research and development because the brittle nature of ceramics/glasses can lead to fracture and loss of seal integrity and functionality. Consequently, any seals involving ceramics/glasses require a significant attention and technology development for reliable SOFC operation. This final report is prepared to describe the progress made in the program on the needs, approaches, and performance of high temperature seals for SOFC. In particular, a new concept of self-healing glass seals is pursued for making seals between metal-ceramic material combinations, including some with a significant expansion mismatch.

  18. Multilayer compressive seal for sealing in high temperature devices

    DOE Patents [OSTI]

    Chou, Yeong-Shyung (Richland, WA); Stevenson, Jeffry W. (Richland, WA)

    2007-08-21

    A mica based compressive seal has been developed exhibiting superior thermal cycle stability when compared to other compressive seals known in the art. The seal is composed of compliant glass or metal interlayers and a sealing (gasket) member layer composed of mica that is infiltrated with a glass forming material, which effectively reduces leaks within the seal. The compressive seal shows approximately a 100-fold reduction in leak rates compared with previously developed hybrid seals after from 10 to about 40 thermal cycles under a compressive stress of from 50 psi to 100 psi at temperatures in the range from 600.degree. C. to about 850.degree. C.

  19. Labyrinth Seal Leakage Analysis 

    E-Print Network [OSTI]

    Inam, Orcun

    2012-10-19

    values of c/s have better kinetic energy dissipation in the cavity. Carryover coefficient is also found to be a function of the Reynolds number and shaft speed. Discharge coefficient of the seal presents the overall efficiency while carryover...

  20. Turbine seal assembly

    DOE Patents [OSTI]

    Little, David A.

    2013-04-16

    A seal assembly that limits gas leakage from a hot gas path to one or more disc cavities in a turbine engine. The seal assembly includes a seal apparatus that limits gas leakage from the hot gas path to a respective one of the disc cavities. The seal apparatus comprises a plurality of blade members rotatable with a blade structure. The blade members are associated with the blade structure and extend toward adjacent stationary components. Each blade member includes a leading edge and a trailing edge, the leading edge of each blade member being located circumferentially in front of the blade member's corresponding trailing edge in a direction of rotation of the turbine rotor. The blade members are arranged such that a space having a component in a circumferential direction is defined between adjacent circumferentially spaced blade members.

  1. Gas turbine sealing apparatus

    DOE Patents [OSTI]

    Marra, John Joseph; Wessell, Brian J.; Liang, George

    2013-03-05

    A sealing apparatus in a gas turbine. The sealing apparatus includes a seal housing apparatus coupled to a disc/rotor assembly so as to be rotatable therewith during operation of the gas turbine. The seal housing apparatus comprises a base member, a first leg portion, a second leg portion, and spanning structure. The base member extends generally axially between forward and aft rows of rotatable blades and is positioned adjacent to a row of stationary vanes. The first leg portion extends radially inwardly from the base member and is coupled to the disc/rotor assembly. The second leg portion is axially spaced from the first leg portion, extends radially inwardly from the base member, and is coupled to the disc/rotor assembly. The spanning structure extends between and is rigidly coupled to each of the base member, the first leg portion, and the second leg portion.

  2. Ingestion resistant seal assembly

    DOE Patents [OSTI]

    Little, David A. (Chuluota, FL)

    2011-12-13

    A seal assembly limits gas leakage from a hot gas path to one or more disc cavities in a gas turbine engine. The seal assembly includes a seal apparatus associated with a blade structure including a row of airfoils. The seal apparatus includes an annular inner shroud associated with adjacent stationary components, a wing member, and a first wing flange. The wing member extends axially from the blade structure toward the annular inner shroud. The first wing flange extends radially outwardly from the wing member toward the annular inner shroud. A plurality of regions including one or more recirculation zones are defined between the blade structure and the annular inner shroud that recirculate working gas therein back toward the hot gas path.

  3. Guide to Air Sealing

    SciTech Connect (OSTI)

    2011-02-01

    Air sealing is one of the most cost-effective ways to improve the comfort and energy efficiency of your home. Hire a certified professional contractor for best results.

  4. Subsea wellhead seal assembly

    SciTech Connect (OSTI)

    Gullion, S.D.

    1988-07-26

    An annular subsea wellhead seal assembly is described for sealing against the walls in a subsea wellhead annulus above a landing seat at the lower end of the annulus comprising: an annular body having an outwardly and downwardly flaring outer skirt and an inwardly and downwardly flaring inner skirt extending from it slower surface, a landing ring having lower landing surface for landing on a landing seat at the lower end of the subsea wellhead annulus in which the assembly is to seal, and an upper flat reaction surface which is positioned immediately under and engagable with the lower ends of the skirts; and means connecting the body and the landing ring for relative movement toward each other; downward movement of the body with respect to the landing ring spreading the skirts outward and inward, respectively, into a substantially horizontal digging engagement set position with the walls of the annulus to be sealed.

  5. Tamper indicating seal

    DOE Patents [OSTI]

    Romero, Juan A. (Albuquerque, NM); Walker, Charles A. (Albuquerque, NM); Blair, Dianna S. (Albuquerque, NM); Bodmer, Connie C. (Albuquerque, NM)

    2012-05-29

    Seals have a flexible wire that can be looped through a hasp-like device. The seals include a body having a recess, a plug insertable into the recess and a snap ring for fastening the plug to the body. The plug and/or body can have access holes for inserting the wire into the recess. "Teeth" on the outer diameter and through-holes through the thickness of the snap ring allow for passing the ends of the flexible wire from the recess through the snap ring. The ends of the wire can be folded back over the snap ring and into engagement with the teeth. Assembly of the seal causes the ends of the wire to be securely fastened between the teeth of the snap ring and the sidewall of the recess. Seals can include a plug and/or body made of a frangible material such as glass, ceramic, glass-ceramic or brittle polymer.

  6. Flexible cloth seal assembly

    DOE Patents [OSTI]

    Bagepalli, B.S.; Taura, J.C.; Aksit, M.F.; Demiroglu, M.; Predmore, D.R.

    1999-06-29

    A seal assembly is described having a flexible cloth seal which includes a shim assemblage surrounded by a cloth assemblage. A first tubular end portion, such as a gas turbine combustor, includes a longitudinal axis and has smooth and spaced-apart first and second surface portions defining a notch there between which is wider at its top than at its bottom and which extends outward from the axis. The second surface portion is outside curved, and a first edge of the cloth seal is positioned in the bottom of the notch. A second tubular end portion, such as a first stage nozzle, is located near, spaced apart from, and coaxially aligned with, the first tubular end portion. The second tubular end portion has a smooth third surface portion which surrounds at least a portion of the first tubular end portion and which is contacted by the cloth seal. 7 figs.

  7. Hall of Fame Seal 

    E-Print Network [OSTI]

    Unknown

    2011-08-17

    This thesis presents the results of high supply (up to 84 bar) pressure testing of hole-pattern annular gas seals performed at the Texas A & M Turbomachinery Laboratory in College Station, TX. The test variables were chosen ...

  8. Ultra high vacuum seal arrangement

    SciTech Connect (OSTI)

    Flaherty, R.

    1981-08-11

    Arrangement for demountably sealing two concentric metallic tubes in an ultra high vacuum system which facilitates remote actuation is claimed. A tubular seal includes integral spaced lips which circumferentially engage the metallic tubes. The lips plastically deform the metallic tubes by mechanical forces resulting from a martensite to austenite transformation of the tubular seal upon application of a predetermined temperature. The sealing force is released upon application of another temperature which causes a transformation from the stronger austenite to the weaker martensite. Use of a dual acting sealing ring and driving ring circumferentially contacting the sealing ring is particularly applicable to sealing larger diameter concentric metallic members.

  9. Seal system with integral detector

    DOE Patents [OSTI]

    Fiarman, S.

    1982-08-12

    A seal system is disclosed for materials where security is of the essence, such as nuclear materials. The seal is tamper-indicating, indicates changes in environmental conditions that evidence attempts to bypass the seal, is unique and cost effective. The seal system is comprised of a seal where an optical signal is transmitted through a loop, with a detector to read said signal, and one or more additional detectors designed to detect environmental changes, these detectors being operatively associated with the seal so that detection of a break in the optical signal or detection of environmental changes will cause an observable change in the seal.

  10. Radial pressure flange seal

    DOE Patents [OSTI]

    Batzer, Thomas H. (Livermore, CA); Call, Wayne R. (Tracy, CA)

    1989-01-01

    This invention provides an all metal seal for vacuum or pressure vessels or systems. This invention does not use gaskets. The invention uses a flange which fits into a matching groove. Fluid pressure is applied in a chamber in the flange causing at least one of the flange walls to radially press against a side of the groove creating the seal between the flange wall and the groove side.

  11. Radial pressure flange seal

    DOE Patents [OSTI]

    Batzer, T.H.; Call, W.R.

    1989-01-24

    This invention provides an all metal seal for vacuum or pressure vessels or systems. This invention does not use gaskets. The invention uses a flange which fits into a matching groove. Fluid pressure is applied in a chamber in the flange causing at least one of the flange walls to radially press against a side of the groove creating the seal between the flange wall and the groove side. 5 figs.

  12. Modeling particle loss in ventilation ducts

    SciTech Connect (OSTI)

    Sippola, Mark R.; Nazaroff, William W.

    2003-04-01

    Empirical equations were developed and applied to predict losses of 0.01-100 {micro}m airborne particles making a single pass through 120 different ventilation duct runs typical of those found in mid-sized office buildings. For all duct runs, losses were negligible for submicron particles and nearly complete for particles larger than 50 {micro}m. The 50th percentile cut-point diameters were 15 {micro}m in supply runs and 25 {micro}m in return runs. Losses in supply duct runs were higher than in return duct runs, mostly because internal insulation was present in portions of supply duct runs, but absent from return duct runs. Single-pass equations for particle loss in duct runs were combined with models for predicting ventilation system filtration efficiency and particle deposition to indoor surfaces to evaluate the fates of particles of indoor and outdoor origin in an archetypal mechanically ventilated building. Results suggest that duct losses are a minor influence for determining indoor concentrations for most particle sizes. Losses in ducts were of a comparable magnitude to indoor surface losses for most particle sizes. For outdoor air drawn into an unfiltered ventilation system, most particles smaller than 1 {micro}m are exhausted from the building. Large particles deposit within the building, mostly in supply ducts or on indoor surfaces. When filters are present, most particles are either filtered or exhausted. The fates of particles generated indoors follow similar trends as outdoor particles drawn into the building.

  13. Workplace Charging Challenge Partner: Freudenberg-NOK Sealing...

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

    (FNST) Freudenberg-NOK aims to be an innovation leader and is committed to reducing emissions. As a producer of advanced sealing technologies used in plug-in electric vehicles...

  14. ORNL working to strengthen seals for nuclear containers | ornl...

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

    filled with nuclear material. The technology uses a light source of entangled photons to verify the continuity of a fiber-based seal. Entanglement is a feature of quantum...

  15. Acoustic Modes in a Ducted Shear Flow Gregory Vilenski

    E-Print Network [OSTI]

    Eindhoven, Technische Universiteit

    Acoustic Modes in a Ducted Shear Flow Gregory Vilenski Sjoerd W. Rienstra Eindhoven University but sheared mean flow inside a duct is considered. For isentropic flow in a circular duct with zero swirl = dimensional inner duct radius d = dimensional outer duct radius = dimensional frequency m = circumferential

  16. Generator stator core vent duct spacer posts

    DOE Patents [OSTI]

    Griffith, John Wesley (Schenectady, NY); Tong, Wei (Clifton Park, NY)

    2003-06-24

    Generator stator cores are constructed by stacking many layers of magnetic laminations. Ventilation ducts may be inserted between these layers by inserting spacers into the core stack. The ventilation ducts allow for the passage of cooling gas through the core during operation. The spacers or spacer posts are positioned between groups of the magnetic laminations to define the ventilation ducts. The spacer posts are secured with longitudinal axes thereof substantially parallel to the core axis. With this structure, core tightness can be assured while maximizing ventilation duct cross section for gas flow and minimizing magnetic loss in the spacers.

  17. A tamper-indicating quantum seal

    E-Print Network [OSTI]

    Brian P. Williams; Keith A. Britt; Travis S. Humble

    2015-08-21

    Technical means for identifying when tampering occurs is a critical part of many containment and surveillance technologies. Conventional fiber optic seals provide methods for monitoring enclosed inventories, but they are vulnerable to spoofing attacks based on classical physics. We address these vulnerabilities with the development of a quantum seal that offers the ability to detect the intercept-resend attack using quantum integrity verification. Our approach represents an application of entanglement to provide guarantees in the authenticity of the seal state by verifying it was transmitted coherently. We implement these ideas using polarization-entangled photon pairs that are verified after passing through a fiber-optic channel testbed. Using binary detection theory, we find the probability of detecting inauthentic signals is greater than 0.9999 with a false alarm chance of 10$^{-9}$ for a 10 second sampling interval. In addition, we show how the Hong-Ou-Mandel effect concurrently provides a tight bound on redirection attack, in which tampering modifies the shape of the seal. Our measurements limit the tolerable path length change to sub-millimeter disturbances. These tamper-indicating features of the quantum seal offer unprecedented security for unattended monitoring systems.

  18. A tamper-indicating quantum seal

    E-Print Network [OSTI]

    Brian P. Williams; Keith A. Britt; Travis S. Humble

    2015-10-15

    Technical means for identifying when tampering occurs is a critical part of many containment and surveillance technologies. Conventional fiber optic seals provide methods for monitoring enclosed inventories, but they are vulnerable to spoofing attacks based on classical physics. We address these vulnerabilities with the development of a quantum seal that offers the ability to detect the intercept-resend attack using quantum integrity verification. Our approach represents an application of entanglement to provide guarantees in the authenticity of the seal state by verifying it was transmitted coherently. We implement these ideas using polarization-entangled photon pairs that are verified after passing through a fiber-optic channel testbed. Using binary detection theory, we find the probability of detecting inauthentic signals is greater than 0.9999 with a false alarm chance of $10^{-9}$ for a 10 second sampling interval. In addition, we show how the Hong-Ou-Mandel effect concurrently provides a tight bound on redirection attack, in which tampering modifies the shape of the seal. Our measurements limit the tolerable path length change to sub-millimeter disturbances. These tamper-indicating features of the quantum seal offer unprecedented security for unattended monitoring systems.

  19. Seal system with integral detector

    DOE Patents [OSTI]

    Fiarman, Sidney (Port Jefferson, NY)

    1985-01-01

    There is disclosed a seal system for materials where security is of the essence, such as nuclear materials, which is tamper-indicating, which indicates changes in environmental conditions that evidence attempts to by-pass the seal, which is unique and cost effective, said seal system comprised of a seal where an optical signal is transmitted through a loop, with a detector to read said signal, and one or more additional detectors designed to detect environmental changes, these detectors being operatively associated with the seal so that detection of a break in the optical signal or detection of environmental changes will cause an observable change in the seal.

  20. High Temperature Leakage Performance of a Hybrid Brush Seal Compared to a Standard Brush Seal and a Labyrinth Seal 

    E-Print Network [OSTI]

    Ashton, Zachary

    2010-01-14

    Adequate sealing in turbomachinery reduces secondary leakage and results in more efficient and stable systems. Labyrinth seals are most common, although brush seals are popular in specialized applications. The Hybrid Brush Seal (HBS) is a novel...

  1. Method of sealing

    DOE Patents [OSTI]

    Groh, Edward F. (Naperville, IL); Cassidy, Dale A. (Valapariso, IN)

    1978-01-01

    A thermocouple lead or other small diameter wire, cable or tube is passed through a thin material such as sheet metal and sealed thereinto by drawing complementary longitudinally angled, laterally rounded grooves terminating at their base ends in a common plane in both sides of the thin material with shearing occuring at the deep end faces thereof to form a rounded opening in the thin material substantially perpendicular to the plane of the thin material, passing a thermocouple lead or similar object through the opening so formed and sealing the opening with a sealant which simultaneously bonds the lead to the thin material.

  2. Sealing coupling. [LMFBR

    DOE Patents [OSTI]

    Pardini, J.A.; Brubaker, R.C.; Rusnak, J.J.

    1982-09-20

    Disclosed is a remotely operable releasable sealing coupling which provides fluid-tight joinder of upper and a lower conduit sections. Each conduit section has a concave conical sealing surface adjacent its end portion. A tubular sleeve having convex spherical ends is inserted between the conduit ends to form line contact with the concave conical end portions. An inwardly projecting lip located at one end of the sleeve cooperates with a retaining collar formed on the upper pipe end to provide swivel capture for the sleeve. The upper conduit section also includes a tapered lower end portion which engages the inside surface of the sleeve to limit misalignment of the connected conduit sections.

  3. OPTIMUM DUCT DESIGN FOR VARIABLE AIR VOLUME SYSTEMS

    E-Print Network [OSTI]

    OPTIMUM DUCT DESIGN FOR VARIABLE AIR VOLUME SYSTEMS By TAECHEOL KIM Master of Science Oklahoma May, 2001 #12;ii OPTIMUM DUCT DESIGN FOR VARIABLE AIR VOLUME SYSTEMS Thesis Approved Volume Systems ............................................. 5 1.2.2. Duct Design Methods

  4. Experimental evaluation of gas filled plenum (GFP) insulation for ducts

    E-Print Network [OSTI]

    Walker, Iain S.; Guillot, Cyril

    2003-01-01

    It is possible that the short duct runs and multiple joints,to greater mixing in actual duct installations in houses,Tout, c/l (°F) Tin, 25mm from duct wall (°C) One heater Tin,

  5. PKA Mediates Constitutive Activation of CFTR in Human Sweat Duct

    E-Print Network [OSTI]

    Reddy, M. M.; Quinton, P. M.

    2009-01-01

    al. 1992), not only in sweat ducts but also in M. M. Reddy,Basal CFTR Activity in Sweat Duct Fig. 6 Effect of cytosolicBasal CFTR Activity in Sweat Duct Fig. 9 Effect of cytosolic

  6. Images in Emergency Medicine: Infected Thyroglossal Duct Cyst

    E-Print Network [OSTI]

    Deaver, Mark J; Silman, Eric F.; Lotfipour, Shahram

    2009-01-01

    Som P. CT of Thyroglossal Duct Cysts. Radiology. 1985; 157:edicine Infected Thyroglossal Duct Cyst Mark J. Deaver, MD,of infected thyroglossal duct cyst was made. The patient was

  7. Static seal for turbine engine

    DOE Patents [OSTI]

    Salazar, Santiago; Gisch, Andrew

    2014-04-01

    A seal structure for a gas turbine engine, the seal structure including first and second components located adjacent to each other and forming a barrier between high and low pressure zones. A seal cavity is defined in the first and second components, the seal cavity extending to either side of an elongated gap extending generally in a first direction between the first and second components. A seal member is positioned within the seal cavity and spans across the elongated gap. The seal member includes first and second side edges extending into each of the components in a second direction transverse to the first direction, and opposing longitudinal edges extending between the side edges generally parallel to the first direction. The side edges include a groove formed therein for effecting a reduction of gas flow around the seal member at the side edges.

  8. Notes 11. High pressure floating ring seals 

    E-Print Network [OSTI]

    San Andres, Luis

    2009-01-01

    Floating ring seals for compressors: leakage and force coefficients, seal lock up and effect on rotor stability, recommendations to reduce seal cross-coupled effects. Long oil seals as pressure barriers in industrial mixers: leakage and force...

  9. Viscous Flow in Ducts We want to study the viscous flow in ducts with various velocities, fluids and duct shapes. The basic

    E-Print Network [OSTI]

    Bahrami, Majid

    Viscous Flow in Ducts We want to study the viscous flow in ducts with various velocities, fluids and duct shapes. The basic problem is this: Given the pipe geometry and its added components (e Fluid Mechanics (S 09) Viscous Flow in Ducts 2 103

  10. Double-duct liquid metal magnetohydrodynamic engine

    DOE Patents [OSTI]

    Haaland, Carsten M. (Oak Ridge, TN)

    1995-01-01

    An internal combustion, liquid metal (LM) magnetohydrodynamic (MHD) engine and an alternating current (AC) magnetohydrodynamic generator, are used in combination to provide useful AC electric energy output. The engine design has-four pistons and a double duct configuration, with each duct containing sodium potassium liquid metal confined between free pistons located at either end of the duct. The liquid metal is forced to flow back and forth in the duct by the movement of the pistons, which are alternatively driven by an internal combustion process. In the MHD generator, the two LM-MHD ducts pass in close proximity through a Hartmann duct with output transformer. AC power is produced by operating the engine with the liquid metal in the two generator ducts always flowing in counter directions. The amount of liquid metal maintained in the ducts may be varied. This provides a variable stroke length for the pistons. The engine/generator provides variable AC power at variable frequencies that correspond to the power demands of the vehicular propulsion. Also the engine should maintain nearly constant efficiency throughout the range of power usage. Automobiles and trucks could be powered by the invention, with no transmission or power converter devices being required.

  11. Double-duct liquid metal magnetohydrodynamic engine

    DOE Patents [OSTI]

    Haaland, Carsten M. (Oak Ridge, TN)

    1997-01-01

    An internal combustion, liquid metal (LM) magnetohydrodynamic (MHD) engine and an alternating current (AC) magnetohydrodynamic generator, are used in combination to provide useful AC electric energy output. The engine design has four pistons and a double duct configuration, with each duct containing sodium potassium liquid metal confined between free pistons located at either end of the duct. The liquid metal is forced to flow back and forth in the duct by the movement of the pistons, which are alternatively driven by an internal combustion process. In the MHD generator, the two LM-MHD ducts pass in close proximity through a Hartmann duct with output transformer. AC power is produced by operating the engine with the liquid metal in the two generator ducts always flowing in counter directions. The amount of liquid metal maintained in the ducts may be varied. This provides a variable stroke length for the pistons. The engine/generator provides variable AC power at variable frequencies that correspond to the power demands of the vehicular propulsion. Also the engine should maintain nearly constant efficiency throughout the range of power usage. Automobiles and trucks could be powered by the invention, with no transmission or power converter devices being required.

  12. Evaluation of a New Ramping Technique for Duct Leakage Testing

    E-Print Network [OSTI]

    1 LBNL-61743 Evaluation of a New Ramping Technique for Duct Leakage Testing Iain S. Walker ramping Technique for Duct Leakage Testing Table of contents Introduction

  13. Integration of HVAC System Design with Simplified Duct Distribution...

    Energy Savers [EERE]

    Integration of HVAC System Design with Simplified Duct Distribution - Building America Top Innovation Integration of HVAC System Design with Simplified Duct Distribution - Building...

  14. Sealed Radioactive Source Accountability

    Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

    1991-12-24

    To establish Department of Energy (DOE) interim policy and to provide guidance for sealed radioactive source accountability. The directive does not cancel any directives. Extended by DOE N 5400.10 to 12-24-93 & Extended by DOE N 5400.12 to 12-24-94.

  15. Sealed Radioactive Source Accountability

    Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

    1994-12-22

    This Notice extends DOE N 5400.9, Sealed Radioactive Source Accountability, of 12-24-91, until 12-24-95, unless sooner superseded or rescinded. The contents of DOE N 5400.9 will be updated and incorporated in the revised DOE O 5480.11, Radiation Protection for Occupational Workers.

  16. Department Seal and Flag

    Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

    1992-05-18

    This directive sets forth the policy governing the use of the official seal and distinguishing flag of the Department of Energy (DOE) as described in Title 10, Code of Federal Regulations (CFR), Part 1002. Cancels DOE O 10002.A dated 1-8-90.

  17. A COMPUTATIONAL AND EXPERIMENTAL ANALYSIS OF A DUCTED FAN USED IN VTOL UAV SYSTEMS

    E-Print Network [OSTI]

    Camci, Cengiz

    diameter ducted fan. They have concentrated on the performance of ducted fan VTOL vehicles in crosswind

  18. Building America Case Study: Duct in Conditioned Space in a Dropped Ceiling or Fur-down, Gainesville, Florida (Fact Sheet), Technology Solutions for New and Existing Homes, Energy Efficiency & Renewable Energy (EERE)

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:FinancingPetroleum Based Fuels ResearchofDerivativeCold Climate Foundation WallConway StreetDuct In

  19. Regenerator cross arm seal assembly

    DOE Patents [OSTI]

    Jackman, Anthony V. (Indianapolis, IN)

    1988-01-01

    A seal assembly for disposition between a cross arm on a gas turbine engine block and a regenerator disc, the seal assembly including a platform coextensive with the cross arm, a seal and wear layer sealingly and slidingly engaging the regenerator disc, a porous and compliant support layer between the platform and the seal and wear layer porous enough to permit flow of cooling air therethrough and compliant to accommodate relative thermal growth and distortion, a dike between the seal and wear layer and the platform for preventing cross flow through the support layer between engine exhaust and pressurized air passages, and air diversion passages for directing unregenerated pressurized air through the support layer to cool the seal and wear layer and then back into the flow of regenerated pressurized air.

  20. Bellows sealed plug valve

    DOE Patents [OSTI]

    Dukas, Jr., Stephen J. (Idaho Falls, ID)

    1990-01-01

    A bellows sealed plug valve includes a valve body having an inlet passage and an outlet passage, a valve chamber between the inlet and outlet passages. A valve plug has substantially the same shape as the valve chamber and is rotatably disposed therein. A shaft is movable linearly in response to a signal from a valve actuator. A bellows is sealingly disposed between the valve chamber and the valve actuator and means are located between the bellows and the valve plug for converting linear movement of the shaft connected to the valve actuator to rotational movement of the plug. Various means are disclosed including helical thread mechanism, clevis mechanism and rack and pinion mechanism, all for converting linear motion to rotational motion.

  1. Gas turbine sealing apparatus

    DOE Patents [OSTI]

    Wiebe, David J; Wessell, Brian J; Ebert, Todd; Beeck, Alexander; Liang, George; Marussich, Walter H

    2013-02-19

    A gas turbine includes forward and aft rows of rotatable blades, a row of stationary vanes between the forward and aft rows of rotatable blades, an annular intermediate disc, and a seal housing apparatus. The forward and aft rows of rotatable blades are coupled to respective first and second portions of a disc/rotor assembly. The annular intermediate disc is coupled to the disc/rotor assembly so as to be rotatable with the disc/rotor assembly during operation of the gas turbine. The annular intermediate disc includes a forward side coupled to the first portion of the disc/rotor assembly and an aft side coupled to the second portion of the disc/rotor assembly. The seal housing apparatus is coupled to the annular intermediate disc so as to be rotatable with the annular intermediate disc and the disc/rotor assembly during operation of the gas turbine.

  2. Laboratory Testing of Aerosol for Enclosure Air Sealing

    SciTech Connect (OSTI)

    Harrington, C.; Modera, M.

    2012-05-01

    Space conditioning energy use can be significantly reduced by addressing uncontrolled infiltration and exfiltration through the envelope of a building. A process for improving the air tightness of a building envelope by sealing shell leaks with an aerosol sealing technology is presented. Both retrofit and new construction applications are possible through applying this process either in attics and crawlspaces or during rough-in stage.

  3. POSTER: Duct tracking in 3D medical data Martin Petrcek

    E-Print Network [OSTI]

    Pelikan, Josef

    POSTER: Duct tracking in 3D medical data Martin PetrĂ­cek Faculty of Mathematics and Physics Charles 2, 180 81 Praha 8 - Liben Czech Republic martin.horak@volny.cz ABSTRACT Implementing duct tracking interaction when selecting duct branches of interest or correcting possible mistakes in duct path segmentation

  4. Numerical Study of Acoustic Modes in Ducted Shear Flow

    E-Print Network [OSTI]

    Rienstra, Sjoerd W.

    Numerical Study of Acoustic Modes in Ducted Shear Flow Gregory G. Vilenski & Sjoerd W. Rienstra mean flow inside a duct is studied numerically. For isentropic flow in a circular duct with zero swirl 26, 2007 #12;1 Introduction Normal mode analysis of small-amplitude disturbances in an annular duct

  5. Closure and Sealing Design Calculation

    SciTech Connect (OSTI)

    T. Lahnalampi; J. Case

    2005-08-26

    The purpose of the ''Closure and Sealing Design Calculation'' is to illustrate closure and sealing methods for sealing shafts, ramps, and identify boreholes that require sealing in order to limit the potential of water infiltration. In addition, this calculation will provide a description of the magma that can reduce the consequences of an igneous event intersecting the repository. This calculation will also include a listing of the project requirements related to closure and sealing. The scope of this calculation is to: summarize applicable project requirements and codes relating to backfilling nonemplacement openings, removal of uncommitted materials from the subsurface, installation of drip shields, and erecting monuments; compile an inventory of boreholes that are found in the area of the subsurface repository; describe the magma bulkhead feature and location; and include figures for the proposed shaft and ramp seals. The objective of this calculation is to: categorize the boreholes for sealing by depth and proximity to the subsurface repository; develop drawing figures which show the location and geometry for the magma bulkhead; include the shaft seal figures and a proposed construction sequence; and include the ramp seal figure and a proposed construction sequence. The intent of this closure and sealing calculation is to support the License Application by providing a description of the closure and sealing methods for the Safety Analysis Report. The closure and sealing calculation will also provide input for Post Closure Activities by describing the location of the magma bulkhead. This calculation is limited to describing the final configuration of the sealing and backfill systems for the underground area. The methods and procedures used to place the backfill and remove uncommitted materials (such as concrete) from the repository and detailed design of the magma bulkhead will be the subject of separate analyses or calculations. Post-closure monitoring will not be addressed in this calculation.

  6. Canister, Sealing Method And Composition For Sealing A Borehole

    DOE Patents [OSTI]

    Brown, Donald W. (Los Alamos, NM); Wagh, Arun S. (Orland Park, IL)

    2005-06-28

    Method and composition for sealing a borehole. A chemically bonded phosphate ceramic sealant for sealing, stabilizing, or plugging boreholes is prepared by combining an oxide or hydroxide and a phosphate with water to form slurry. The slurry is introduced into the borehole where the seal, stabilization or plug is desired, and then allowed to set up to form the high strength, minimally porous sealant, which binds strongly to itself and to underground formations, steel and ceramics.

  7. Mode propagation and attenuation in lined ducts

    E-Print Network [OSTI]

    BI, Wenping

    2014-01-01

    Optimal impedance for each mode is an important concept in an infinitely long duct lined with uniform absorption material. However it is not valid for finite length linings. This is because that the modes in lined ducts are not power-orthogonal; the total sound power is not equal to the sum of the sound power of each mode; cross-power terms may play important roles. In this paper, we study sound propagation and attenuation in an infinite rigid duct lined with a finite length of lining impedance. The lining impedance may be axial segments and circumferentially non-uniform. We propose two new physical quantities Kp and S to describe the self-overlap of the left eigenfunction and right eigenfunction of one mode and the normalized overlap between modes, respectively. The two new physical quantities describe totally the mode behaviors in lined ducts.

  8. Tips: Air Ducts | Department of Energy

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

    tubes in the walls, floors, and ceilings; it carries the air from your home's furnace and central air conditioner to each room. Ducts are made of sheet metal, fiberglass, or other...

  9. Acoustic imaging of a duct spinning mode by the use of an in-duct circular microphone array

    E-Print Network [OSTI]

    Huang, Xun

    Acoustic imaging of a duct spinning mode by the use of an in-duct circular microphone array Qingkai 2013) An imaging method of acoustic spinning modes propagating within a circular duct simply in a theoretical way and is demonstrated by a numerical simulation case. Nowadays, the measurements within a duct

  10. Metal to ceramic sealed joint

    DOE Patents [OSTI]

    Lasecki, John V. (Livonia, MI); Novak, Robert F. (Farmington Hills, MI); McBride, James R. (Ypsilanti, MI)

    1991-01-01

    A metal to ceramic sealed joint which can withstand wide variations in temperature and maintain a good seal is provided for use in a device adapted to withstand thermal cycling from about 20 to about 1000 degrees C. The sealed joint includes a metal member, a ceramic member having an end portion, and an active metal braze forming a joint to seal the metal member to the ceramic member. The joint is positioned remote from the end portion of the ceramic member to avoid stresses at the ends or edges of the ceramic member. The sealed joint is particularly suited for use to form sealed metal to ceramic joints in a thermoelectric generator such as a sodium heat engine where a solid ceramic electrolyte is joined to metal parts in the system.

  11. Metal to ceramic sealed joint

    DOE Patents [OSTI]

    Lasecki, J.V.; Novak, R.F.; McBride, J.R.

    1991-08-27

    A metal to ceramic sealed joint which can withstand wide variations in temperature and maintain a good seal is provided for use in a device adapted to withstand thermal cycling from about 20 to about 1000 degrees C. The sealed joint includes a metal member, a ceramic member having an end portion, and an active metal braze forming a joint to seal the metal member to the ceramic member. The joint is positioned remote from the end portion of the ceramic member to avoid stresses at the ends or edges of the ceramic member. The sealed joint is particularly suited for use to form sealed metal to ceramic joints in a thermoelectric generator such as a sodium heat engine where a solid ceramic electrolyte is joined to metal parts in the system. 11 figures.

  12. A Comparison of Simulation Capabilities for Ducts

    SciTech Connect (OSTI)

    Miller, William A.; Smith, Matt K.; Gu, Lixing; New, Joshua Ryan

    2014-11-01

    Typically, the cheapest way to install a central air conditioning system in residential buildings is to place the ductwork in the attic. Energy losses due to duct-attic interactions can be great, but current whole-house models are unable to capture the dynamic multi-mode physics of the interactions. The building industry is notoriously fragmented and unable to devote adequate research resources to solve this problem. Builders are going to continue to put ducts in the attic because floor space is too expensive to closet them within living space, and there are both construction and aesthetic issues with other approaches such as dropped ceilings. Thus, there is a substantial need to publicly document duct losses and the cost of energy used by ducts in attics so that practitioners, builders, homeowners and state and federal code officials can make informed decisions leading to changes in new construction and additional retrofit actions. Thus, the goal of this study is to conduct a comparison of AtticSim and EnergyPlus simulation algorithms to identify specific features for potential inclusion in EnergyPlus that would allow higher-fidelity modeling of HVAC operation and duct transport of conditioned air. It is anticipated that the resulting analysis from these simulation tools will inform energy decisions relating to the role of ducts in future building energy codes and standards.

  13. Building America Technology Solutions for New and Existing Homes...

    Energy Savers [EERE]

    Technology Solutions for New and Existing Homes: Duct in Conditioned Space in a Dropped Ceiling or Fur-down, Gainesville, Florida (Fact Sheet) Building America Technology Solutions...

  14. Rim seal for turbine wheel

    DOE Patents [OSTI]

    Glezer, Boris (Del Mar, CA); Boyd, Gary L. (Alpine, CA); Norton, Paul F. (San Diego, CA)

    1996-01-01

    A turbine wheel assembly includes a disk having a plurality of blades therearound. A ceramic ring is mounted to the housing of the turbine wheel assembly. A labyrinth rim seal mounted on the disk cooperates with the ceramic ring to seal the hot gases acting on the blades from the disk. The ceramic ring permits a tighter clearance between the labyrinth rim seal and the ceramic ring.

  15. Pressure sensor for sealed containers

    DOE Patents [OSTI]

    Hodges, Franklin R. (Loudon, TN)

    2001-01-01

    A magnetic pressure sensor for sensing a pressure change inside a sealed container. The sensor includes a sealed deformable vessel having a first end attachable to an interior surface of the sealed container, and a second end. A magnet mounted to the vessel second end defining a distance away from the container surface provides an externally detectable magnetic field. A pressure change inside the sealed container causes deformation of the vessel changing the distance of the magnet away from the container surface, and thus the detectable intensity of the magnetic field.

  16. Internal coaxial cable seal system

    DOE Patents [OSTI]

    Hall, David R.; Sneddon, Cameron; Dahlgren, Scott Steven; Briscoe, Michael A.

    2006-07-25

    The invention is a seal system for a coaxial cable and is placed within the coaxial cable and its constituent components. A series of seal stacks including load ring components and elastomeric rings are placed on load bearing members within the coaxial cable sealing the annular space between the coaxial cable and an electrical contact passing there through. The coaxial cable is disposed within drilling components to transmit electrical signals between drilling components within a drill string. The seal system can be used in a variety of downhole components, such as sections of pipe in a drill string, drill collars, heavy weight drill pipe, and jars.

  17. AIR SEALING Seal air leaks and save energy!

    E-Print Network [OSTI]

    Oak Ridge National Laboratory

    Kitchen Range Hood Kitchen and bath vents provide spot ventilation Annual Energy Costs for 1300 sq. ft AND RENEWABLE ENERGY · U.S. DEPARTMENT OF ENERGY #12; W H A T A RAIR SEALING Seal air leaks and save energy! W H A T I S A I R L E A K A G E ? Ventilation is fresh

  18. Case Study of Envelope Sealing in Existing Multiunit Structures

    SciTech Connect (OSTI)

    Dentz, J.; Conlin, F.; Podorson, D.

    2012-10-01

    Envelope air sealing was included in the retrofit of a 244 unit low-rise multifamily housing complex in Durham, N.C. Pre- and post-retrofit enclosure leakage tests were conducted on 51 units and detailed diagnostics were performed on 16. On average, total leakage was reduced by nearly half, from 19.7 ACH50 to 9.4 ACH50. Costs for air sealing were $0.31 per square foot of conditioned floor area, lower than estimates found in the National Residential Efficiency Measures Database (NREMD) and other sources, perhaps due in part to the large-scale production nature of the project. Modeling with BEopt software -- using an estimate of 85% of the envelope air leakage going to the outside (based on guarded tests performed at the site) -- calculated a space conditioning energy cost savings of 15% to 21% due to the air sealing retrofit. Important air leakage locations identified included plumbing and electrical penetrations, dropped ceilings/soffits, windows, ducts and wall-to-floor intersections. Previous repair activity had created significant leakage locations as well. Specifications and a pictorial guide were developed for contractors performing the work.

  19. Pancreatic duct replication is increased with obesity and type 2 diabetes in humans

    E-Print Network [OSTI]

    Butler, A. E.; Galasso, R.; Matveyenko, A.; Rizza, R. A.; Dry, S.; Butler, P. C.

    2010-01-01

    1556-8 ARTICLE Pancreatic duct replication is increased withwe noted increased exocrine duct replication. This is aafter immunostaining for the duct cell marker cytokeratin

  20. Statistical maritime radar duct estimation using hybrid genetic algorithm-Markov chain Monte Carlo method

    E-Print Network [OSTI]

    Yardim, Caglar; Gerstoft, Peter; Hodgkiss, William S.

    2007-01-01

    Estimating evaporation duct heights from radar sea echo,”Estimation of surface-based duct parameters from surfaceapplication of an evaporation duct model,” Radio Science,

  1. Experiments measuring particle deposition from fully developed turbulent flow in ventilation ducts

    E-Print Network [OSTI]

    Sippola, Mark R.; Nazaroff, William W.

    2003-01-01

    of Particles in Vertical Ducts with Smooth and RoughDeposition in Ventilation Ducts, Ph. D. Dissertation,Applicability to Ventilation Ducts in Commercial Buildings,

  2. Compliant high temperature seals for dissimilar materials

    DOE Patents [OSTI]

    Rynders, Steven Walton (Fogelsville, PA); Minford, Eric (Laurys Station, PA); Tressler, Richard Ernest (Boalsburg, PA); Taylor, Dale M. (Salt Lake City, UT)

    2001-01-01

    A high temperature, gas-tight seal is formed by utilizing one or more compliant metallic toroidal ring sealing elements, where the applied pressure serves to activate the seal, thus improving the quality of the seal. The compliant nature of the sealing element compensates for differences in thermal expansion between the materials to be sealed, and is particularly useful in sealing a metallic member and a ceramic tube art elevated temperatures. The performance of the seal may be improved by coating the sealing element with a soft or flowable coating such as silver or gold and/or by backing the sealing element with a bed of fine powder. The material of the sealing element is chosen such that the element responds to stress elastically, even at elevated temperatures, permitting the seal to operate through multiple thermal cycles.

  3. 1 | Building America eere.energy.gov Evaluation of Ducted GE

    E-Print Network [OSTI]

    1 | Building America eere.energy.gov Evaluation of Ducted GE Hybrid Heat Pump Water Heater in PNNL Lab Homes Sarah Widder Building America Program Review April 24-25, 2013 #12;2 | Building America eere Technologies Program ­ DOE, Office of Electricity Project Partners #12;3 | Building America eere

  4. Airfoil seal system for gas turbine engine

    DOE Patents [OSTI]

    Diakunchak, Ihor S.

    2013-06-25

    A turbine airfoil seal system of a turbine engine having a seal base with a plurality of seal strips extending therefrom for sealing gaps between rotational airfoils and adjacent stationary components. The seal strips may overlap each other and may be generally aligned with each other. The seal strips may flex during operation to further reduce the gap between the rotational airfoils and adjacent stationary components.

  5. Sealed head access area enclosure

    DOE Patents [OSTI]

    Golden, Martin P. (Trafford, PA); Govi, Aldo R. (Greensburg, PA)

    1978-01-01

    A liquid-metal-cooled fast breeder power reactor is provided with a sealed head access area enclosure disposed above the reactor vessel head consisting of a plurality of prefabricated structural panels including a center panel removably sealed into position with inflatable seals, and outer panels sealed into position with semipermanent sealant joints. The sealant joints are located in the joint between the edge of the panels and the reactor containment structure and include from bottom to top an inverted U-shaped strip, a lower layer of a room temperature vulcanizing material, a separator strip defining a test space therewithin, and an upper layer of a room temperature vulcanizing material. The test space is tapped by a normally plugged passage extending to the top of the enclosure for testing the seal or introducing a buffer gas thereinto.

  6. Duct Leakage Impacts on VAV System Performance in California Large

    E-Print Network [OSTI]

    LBNL-53605 Duct Leakage Impacts on VAV System Performance in California Large Commercial Buildings and for implementing the duct models in a form that could readily be used in this project; and Brian Smith (LBNL

  7. Building America Top Innovations 2013 Profile – Buried and Encapsulated Ducts

    SciTech Connect (OSTI)

    2013-09-01

    In this innovation profile, CARB research shows HVAC ducts that are encapsulated in closed-cell spray foam and buried in blown insulation in a vented attic meet the code requirements for ducts in conditioned space.

  8. Microsoft Word - VitPlantInstallsCrucialDuct_20110209.doc

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

    Treatment Plant, also known as the "Vit Plant," set a giant heating, ventilation and air-conditioning (HVAC) duct in the High-Level Waste Facility. The nuclear-quality duct is...

  9. Minimizing Energy Losses in Ducts | Department of Energy

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

    is critical. In recent years, energy-saving designs have sought to include ducts and heating systems in the conditioned space. Many existing duct systems lose a lot of energy...

  10. Potential Flow Calculations of Axisymmetric Ducted Wind Turbines

    E-Print Network [OSTI]

    Widnall, Sheila

    2009-09-02

    An incompressible potential-flow vortex method has been constructed to analyze the flow field of a ducted

  11. A ``NEW'' APPROACH TO ACTIVE NOISE CONTROL IN DUCTS 1

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    A ``NEW'' APPROACH TO ACTIVE NOISE CONTROL IN DUCTS 1 Prashant Mehta 2 , Yuan Zheng 3 , Yossi Chait consider the fixed­filter design ap­ proach for active noise control (ANC) in ducts. Based on a large body.e., a duct equipped with both feedforward and feedback sensors and a control speaker. Our design of a linear

  12. LBNL-41434. CAN DUCT-TAPE TAKE THE HEAT?

    E-Print Network [OSTI]

    LBNL-41434. 1 CAN DUCT-TAPE TAKE THE HEAT? Max Sherman Iain Walker Energy Performance of Buildings Group Lawrence Berkeley National Laboratory University of California Duct leakage has been identified as a major source of energy loss in residential buildings. Most duct leakage occurs at the connections

  13. Clutter-Based Evaporation Duct Estimation Performance Using Meteorological Statistics

    E-Print Network [OSTI]

    Gerstoft, Peter

    Clutter-Based Evaporation Duct Estimation Performance Using Meteorological Statistics Caglar Yardim in different regions of the world with varying duct strengths and statistics. The performance of evaporation duct estimation is investigated in littoral zones such as the North Sea, Wallops Island, Coast

  14. Cuton, cutoff transition of sound in slowly varying flow ducts

    E-Print Network [OSTI]

    Eindhoven, Technische Universiteit

    Cut­on, cut­off transition of sound in slowly varying flow ducts Sjoerd W. Rienstra 19­walled duct with irrotational isentropic mean flow is studied. The usual turning point behaviour was found. 1 Introduction The exact multiple scale solution for sound propagation in a slowly varying lined flow duct

  15. Longevity of Duct Tape in Residential Air Distribution

    E-Print Network [OSTI]

    LBNL 51099 Longevity of Duct Tape in Residential Air Distribution Systems: 1-D, 2-D, and 3-D Joints involved the aging of common "core-to-collar joints" of flexible duct to sheet metal collars, and sheet consisted of baking duct tape specimens in a constant 212°F (100°C) oven following the UL 181B

  16. SOUND PROPAGATION IN SLOWLY VARYING LINED FLOW DUCTS

    E-Print Network [OSTI]

    Eindhoven, Technische Universiteit

    SOUND PROPAGATION IN SLOWLY VARYING LINED FLOW DUCTS OF ARBITRARY CROSS SECTION S.W. Rienstra.w.rienstra@tue.nl November 20, 2002 Abstract Sound transmission through ducts of constant cross section with a uniform expansion, where the modes are eigenfunctions of the corresponding Laplace eigenvalue problem along a duct

  17. ORIGINAL ARTICLE A Mathematical Model of the Pancreatic Duct Cell

    E-Print Network [OSTI]

    Ermentrout, G. Bard

    ORIGINAL ARTICLE A Mathematical Model of the Pancreatic Duct Cell Generating High Bicarbonate a simple, physiologically based mathemati- cal model of pancreatic duct cell secretion using experimentally CFTR activation. Methods: A new mathematical model was developed simulating a duct cell within

  18. Improved Wireless Performance from Mode Scattering in Ventilation Ducts

    E-Print Network [OSTI]

    Stancil, Daniel D.

    Improved Wireless Performance from Mode Scattering in Ventilation Ducts Benjamin E. Henty, PA 15230. henty@eirp.org and stancil@cmu.edu Abstract Ventilation ducts are a convenient undesirable in a ven- tilation duct setting. With this in mind we investigate the mode scattering effects

  19. Nucleonic analysis of the ETF neutral-beam-injector-duct and vacuum-pumping-duct shields

    SciTech Connect (OSTI)

    Urban, W.T.; Seed, T.J.; Dudziak, D.J.

    1981-05-01

    A nucleonic analysis of the Engineering Test Facility neutral-beam-injector-duct and vacuum-pumping-duct shields has been made using a hybrid Monte Carlo/discrete-ordinates method. This method used Monte Carlo to determine internal and external boundary surface sources for subsequent discrete-ordinates calculations of the neutron and gamma-ray transport through the shields. Confidence was provided in both the hybrid method and the results obtained through a comparison with three-dimensional Monte Carlo results. Also determined in the analysis were the energy and angular distributions of neutrons and gamma rays entering the neutral-beam-injector duct from the toroidal plasma chamber, as well as exiting the duct into the neutral-beam-injector chamber. In addition, the energy and angular distributions of neutrons entering the vacuum-pumping chamber were determined.

  20. Seal device for ferromagnetic containers

    DOE Patents [OSTI]

    Meyer, Ross E. (Los Alamos, NM); Jason, Andrew J. (Los Alamos, NM)

    1994-01-01

    A temporary seal or patch assembly prevents the escape of contents, e.g., fluids and the like, from within a container having a breach therethrough until the contents can be removed and/or a repair effected. A frame that supports a sealing bladder can be positioned over the breach and the frame is then attached to the container surface, which must be of a ferromagnet material, by using switchable permanent magnets. The permanent magnets are designed to have a first condition that is not attracted to the ferromagnetic surface and a second conditions whereby the magnets are attracted to the surface with sufficient force to support the seal assembly on the surface. Latching devices may be attached to the frame and engage the container surface with hardened pins to prevent the lateral movement of the seal assembly along the container surface from external forces such as fluid drag or gravity.

  1. Labyrinth stepped seal geometric optimization 

    E-Print Network [OSTI]

    Wernig, Marcus Daniel

    1995-01-01

    High-speed rotating machinery poses a challenging problem to designers and engineers. Interference between rotating and stationary elements can result in excessive wear, decreased machine performance, or machine failure. Labyrinth seals present a...

  2. Seal device for ferromagnetic containers

    DOE Patents [OSTI]

    Meyer, R.E.; Jason, A.J.

    1994-10-18

    A temporary seal or patch assembly prevents the escape of contents, e.g., fluids and the like, from within a container having a breach there through until the contents can be removed and/or a repair effected. A frame that supports a sealing bladder can be positioned over the breach and the frame is then attached to the container surface, which must be of a ferromagnet material, by using switchable permanent magnets. The permanent magnets are designed to have a first condition that is not attracted to the ferromagnetic surface and a second conditions whereby the magnets are attracted to the surface with sufficient force to support the seal assembly on the surface. Latching devices may be attached to the frame and engage the container surface with hardened pins to prevent the lateral movement of the seal assembly along the container surface from external forces such as fluid drag or gravity. 10 figs.

  3. Comparative Testing of the Combined Radiant Barrier and Duct Models in the ESL's Code-Compliant Simulation Model 

    E-Print Network [OSTI]

    Kim, S.; Haberl, J. S.

    2007-07-10

    model and the EnergyGauge program by the Florida Solar Energy Center (FSEC). Sensitivity analyses were performed by varying duct insulation level, supply duct area, return duct area, supply duct leakage, return duct leakage, and ceiling insulation levels...

  4. An ideal sealed source life-cycle

    SciTech Connect (OSTI)

    Tompkins, Joseph Andrew [Los Alamos National Laboratory

    2009-01-01

    In the last 40 years, barriers to compliant and timely disposition of radioactive sealed sources have become apparent. The story starts with the explosive growth of nuclear gauging technologies in the 1960s. Dozens of companies in the US manufactured sources and many more created nuclear solutions to industrial gauging problems. Today they do not yet know how many Cat 1, 2, or 3 sources there are in the US. There are, at minimum, tens of thousands of sources, perhaps hundreds of thousands of sources. Affordable transportation solutions to consolidate all of these sources and disposition pathways for these sources do not exist. The root problem seems to be a lack of necessary regulatory framework that has allowed all of these problems to accumulate with no national plan for solving the problem. In the 1960s, Pu-238 displaced Pu-239 for most neutron and alpha source applications. In the 1970s, the availability of inexpensive Am-241 resulted in a proliferation of low energy gamma sources used in nuclear gauging, well logging, pacemakers, and X-ray fluorescence applications for example. In the 1980s, rapid expansion of worldwide petroleum exploration resulted in the expansion of Am-241 sources into international locations. Improvements of technology and regulation resulted in a change in isotopic distribution as Am-241 made Pu-239 and Pu-238 obsolete. Many early nuclear gauge technologies have been made obsolete as they were replaced by non-nuclear technoogies. With uncertainties in source end of life disposition and increased requirements for sealed source security, nuclear gauging technology is the last choice for modern process engineering gauging solutions. Over the same period, much was learned about licensing LLW disposition facilities as evident by the closure of early disposition facilities like Maxey Flats. The current difficulties in sealed source disposition start with adoption of the NLLW policy act of 1985, which created the state LLW compact system they we have today. This regulation created a new regulatory framework seen as promising at the time. However, now they recognize that, despite the good intentions, the NIJWP/85 has not solved any source disposition problems. The answer to these sealed source disposition problems is to adopt a philosophy to correct these regulatory issues, determine an interim solution, execute that solution until there is a minimal backlog of sources to deal with, and then let the mechanisms they have created solve this problem into the foreseeable future. The primary philosophical tenet of the ideal sealed source life cycle follows. You do not allow the creation (or importation) of any source whose use cannot be justified, which cannot be affordably shipped, or that does not have a well-delinated and affordable disposition pathway. The path forward dictates that we fix the problem by embracing the Ideal Source Life cycle. In figure 1, we can see some of the elements of the ideal source life cycle. The life cycle is broken down into four portions, manufacture, use, consolidation, and disposition. These four arbitrary elements allow them to focus on the ideal life cycle phases that every source should go through between manufacture and final disposition. As we examine the various phases of the sealed source life cycle, they pick specific examples and explore the adoption of the ideal life cycle model.

  5. Particle deposition in ventilation ducts: Connectors, bends anddeveloping flow

    SciTech Connect (OSTI)

    Sippola, Mark R.; Nazaroff, William W.

    2004-03-01

    In ventilation duct flow the turbulent flow profile is commonly disturbed or not fully developed and these conditions are likely to influence particle deposition to duct surfaces. Particle deposition rates at eight S-connectors, in two 90{sup o} duct bends and in two ducts where the turbulent flow profile was not fully developed were measured in a laboratory duct system with both galvanized steel and internally insulated ducts with hydraulic diameters of 15.2 cm. In the steel duct system, experiments with nominal particle diameters of 1, 3, 5, 9 and 16 {micro}m were conducted at each of three nominal air speeds: 2.2, 5.3 and 9.0 m/s. In the insulated duct system, deposition of particles with nominal diameters of 1, 3, 5, 8 and 13 {micro}m was measured at nominal air speeds of 2.2, 5.3 and 8.8 m/s. Fluorescent techniques were used to directly measure the deposition velocities of monodisperse fluorescent particles to duct surfaces. Deposition at S-connectors, in bends and in straight ducts with developing turbulence was often greater than deposition in straight ducts with fully developed turbulence for equal particle sizes, air speeds and duct surface orientations. Deposition rates at all locations were found to increase with an increase in particle size or air speed. High deposition rates at S-connectors resulted from impaction and these rates were nearly independent of the orientation of the S-connector. Deposition rates in the two 90{sup o} bends differed by more than an order of magnitude in some cases, probably because of the difference in turbulence conditions at the bend inlets. In straight steel ducts where the turbulent flow profile was developing, the deposition enhancement relative to fully developed turbulence generally increased with air speed and decreased with downstream distance from the duct inlet. This enhancement was greater at the duct ceiling and wall than at the duct floor. In insulated ducts, deposition enhancement was less pronounced overall than in steel ducts. Trends that were observed in steel ducts were present, but weaker, in insulated ducts.

  6. 2011 Fur Seal Subsistence Harvest Report The Subsistence Harvest of Northern Fur Seals

    E-Print Network [OSTI]

    .................................................................................................................... 6 By-products and Waste seals harvested b) incidence of by-products and waste during the harvest process c) the occurrence debris and the number of seals disentangled g) evidence of oil contaminated seal pelts h) other types

  7. Leakage and rotordynamic effects of pocket damper seals and see-through labyrinth seals 

    E-Print Network [OSTI]

    Gamal Eldin, Ahmed Mohamed

    2009-05-15

    This dissertation discusses research on the leakage and rotordynamic characteristics of pocket damper seals (PDS) and see-through labyrinth seals, presents and evaluates models for labyrinth seal and PDS leakage and PDS ...

  8. Canister, sealing method and composition for sealing a borehole

    DOE Patents [OSTI]

    Brown, Donald W. (Los Alamos, NM); Wagh, Arun S. (Orland Park, IL)

    2003-05-13

    Canister, sealing method and composition for sealing a borehole. The canister includes a container with slurry inside the container, one or more slurry exits at one end of the container, a pump at the other end of the container, and a piston inside that pushes the slurry though the slurry exit(s), out of the container, and into a borehole. An inflatable packer outside the container provides stabilization in the borehole. A borehole sealing material is made by combining an oxide or hydroxide and a phosphate with water to form a slurry which then sets to form a high strength, minimally porous material which binds well to itself, underground formations, steel and ceramics.

  9. Laser sealed vacuum insulating window

    DOE Patents [OSTI]

    Benson, D.K.; Tracy, C.E.

    1985-08-19

    A laser sealed evacuated window panel is comprised of two glass panes held spaced apart in relation to each other by a plurality of spherical glass beads and glass welded around the edges to provide an evacuated space between the glass panes that is completely glass sealed from the exterior. The glass welded edge seal is obtained by welding the edges of the glass panes together with a laser beam while the glass panes and bead spacers are positioned in a vacuum furnace and heated to the annealing point of the glass to avoid stress fracture in the area of the glass weld. The laser welding in the furnace can be directed around the perimeter of the galss panel by a combination of rotating the glass panel and linearly translating or aiming the laser with a relay mirror.

  10. Laser sealed vacuum insulation window

    DOE Patents [OSTI]

    Benson, David K. (Golden, CO); Tracy, C. Edwin (Golden, CO)

    1987-01-01

    A laser sealed evacuated window panel is comprised of two glass panes held spaced apart in relation to each other by a plurality of spherical glass beads and glass welded around the edges to provide an evacuated space between the glass panes that is completely glass sealed from the exterior. The glass welded edge seal is obtained by welding the edges of the glass panes together with a laser beam while the glass panes and bead spacers are positioned in a vacuum furnace and heated to the annealing point of the glass to avoid stress fracture in the area of the glass weld. The laser welding in the furnace can be directed around the perimeter of the glass panel by a combination of rotating the glass panel and linearly translating or aiming the laser with a relay mirror.

  11. Stabilizing geometry for hydrodynamic rotary seals

    DOE Patents [OSTI]

    Dietle, Lannie L. (Houston, TX); Schroeder, John E. (Richmond, TX)

    2010-08-10

    A hydrodynamic sealing assembly including a first component having first and second walls and a peripheral wall defining a seal groove, a second component having a rotatable surface relative to said first component, and a hydrodynamic seal comprising a seal body of generally ring-shaped configuration having a circumference. The seal body includes hydrodynamic and static sealing lips each having a cross-sectional area that substantially vary in time with each other about the circumference. In an uninstalled condition, the seal body has a length defined between first and second seal body ends which varies in time with the hydrodynamic sealing lip cross-sectional area. The first and second ends generally face the first and second walls, respectively. In the uninstalled condition, the first end is angulated relative to the first wall and the second end is angulated relative to the second wall. The seal body has a twist-limiting surface adjacent the static sealing lip. In the uninstalled condition, the twist-limiting surface is angulated relative to the peripheral wall and varies along the circumference. A seal body discontinuity and a first component discontinuity mate to prevent rotation of the seal body relative to the first component.

  12. High Pressure Rotary Shaft Sealing Mechanism

    DOE Patents [OSTI]

    Dietle, Lannie (Sugar Land, TX); Gobeli, Jeffrey D. (Houston, TX)

    2001-05-08

    A laterally translatable pressure staged rotary shaft sealing mechanism having a seal housing with a shaft passage therein being exposed to a fluid pressure P1 and with a rotary shaft being located within the shaft passage. At least one annular laterally translatable seal carrier is provided. First and second annular resilient sealing elements are supported in axially spaced relation by the annular seal carriers and have sealing relation with the rotary shaft. The seal housing and at least one seal carrier define a first pressure staging chamber exposed to the first annular resilient sealing element and a second pressure staging chamber located between and exposed to the first and second annular resilient sealing elements. A first fluid is circulated to the first pressure chamber at a pressure P1, and a second staging pressure fluid is circulated to the second pressure chamber at a fraction of pressure P1 to achieve pressure staging, cooling of the seals. Seal placement provides hydraulic force balancing of the annular seal carriers.

  13. Dual rotating shaft seal apparatus

    DOE Patents [OSTI]

    Griggs, J.E.; Newman, H.J.

    1983-06-16

    The report is directed to apparatus suitable for transferring torque and rotary motion through a wall in a manner which is essentially gas impermeable. The apparatus can be used for pressurizing, agitating, and mixing fluids and features two ferrofluidic, i.e., ferrometic seals. Each seal is disposed on one of two supported shafts and each shaft is operably connected at one end to a gear mechanism and at its other end to an adjustable coupling means which is to be connected to a rotatable shaft extending through a wall through which torque and rotary motion are to be transferred.

  14. Investigation of stepped labyrinth seal leakage performance 

    E-Print Network [OSTI]

    Reed, Thomas Stanley

    1993-01-01

    Leakage resistance of advanced design, stepped labyrinth seals has been examined based on geometric considerations. Leakage measurements were obtained in an attempt to identify geometric and flow characteristics contributing to a desired seal...

  15. Rotordynamic evaluation of hybrid damper seals with metal mesh elements 

    E-Print Network [OSTI]

    Bhamidipati, Laxmi Narasimha Kameswara Sarma

    2003-01-01

    Metal mesh hybrid damper seals (MHS) were proposed to be an alternative for brush hybrid pocket damper seals (PDS) in turbomachinery. The metal mesh hybrid damper seal is a hybrid of the pocket damper seal and the metal ...

  16. Reporting of Radioactive Sealed Sources

    Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

    2008-02-27

    To establish U.S. Department of Energy requirements for inventory reporting, transaction reporting, verification of reporting, and assign responsibilities for reporting of radioactive sealed sources. DOE N 251.86 extends this notice until 5-6-11. No cancellations. Canceled by DOE O 231.1B

  17. Piston rod seal for a Stirling engine

    DOE Patents [OSTI]

    Shapiro, Wilbur (Schenectady, NY)

    1984-01-01

    In a piston rod seal for a Stirling engine, a hydrostatic bearing and differential pressure regulating valve are utilized to provide for a low pressure differential across a rubbing seal between the hydrogen and oil so as to reduce wear on the seal.

  18. Method for sealing remote leaks in an enclosure using an aerosol

    DOE Patents [OSTI]

    Modera, Mark P. (Piedmont, CA); Carrie, Francois R. (Lyons, FR)

    1999-01-01

    The invention is a method and device for sealing leaks remotely by means of injecting a previously prepared aerosol into the enclosure being sealed according to a particular sealing efficiency defined by the product of a penetration efficiency and a particle deposition efficiency. By using different limits in the relationship between penetration efficiency and flowrate, the same method according the invention can be used for coating the inside of an enclosure. Specifically the invention is a method and device for preparing, transporting, and depositing a solid phase aerosol to the interior surface of the enclosure relating particle size, particle carrier flow rate, and pressure differential, so that particles deposited there can bridge and substantially seal each leak, with out providing a substantial coating at inside surfaces of the enclosure other than the leak. The particle size and flow parameters can be adjusted to coat the interior of the enclosure (duct) without substantial plugging of the leaks depending on how the particle size and flowrate relationships are chosen.

  19. DOE Challenge Home Technical Training - Ducts in Conditioned...

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

    of the U.S. Department of Energy Challenge Home program: Design Options for Locating Ducts within Conditioned Space. challengehometechnicaltraining.pdf More Documents &...

  20. Buried and Encapsulated Ducts, Jacksonville, Florida (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2013-11-01

    Ductwork installed in unconditioned attics can significantly increase the overall heating and cooling costs of residential buildings. In fact, estimated duct thermal losses for single-family residential buildings with ductwork installed in unconditioned attics range from 10% to 45%. In a study of three single-story houses in Florida, the Building America research team Consortium for Advanced Residential Buildings (CARB) investigated the strategy of using buried and/or encapsulated ducts (BED) to reduce duct thermal losses in existing homes. The BED strategy consists of burying ducts in loose-fill insulation and/or encapsulating them in closed cell polyurethane spray foam (ccSPF) insulation. There are three possible combinations of BED strategies: (1) buried ducts; (2) encapsulated ducts (with ccSPF); and (3) buried and encapsulated ducts. The best solution for each situation depends on the climate, age of the house, and the configuration of the HVAC system and attic. For new construction projects, the team recommends that ducts be both encapsulated and buried as the minimal planning and costs required for this will yield optimal energy savings. The encapsulated/buried duct strategy, which utilizes ccSPF to address condensation concerns, is an approach that was developed specifically for humid climates.

  1. Evaluation of friction loss in flexible and galvanized duct 

    E-Print Network [OSTI]

    Zimmermann, Carlos Michael Alberto

    1985-01-01

    runs and in 90 degree elbows at various center line radii to diameter ratios (r/d). Three, 3. 658 meter (m) (12 ft) sections of straight, flexible 152 millimeter (mm) (6 in) and 203 sss (8 in) duct and three, 3. 048 m (10 ft) sections of straight... mean data and that ail three factors (duct size, duct type and air flow volume) contribute to this difference. Three sections of each type (flexible and galvanized) and size (152 and 203 sws) duct were tested in 90 degree elbows at five different r/d...

  2. Improving Building Envelope and Duct Airtightness of US Dwellings...

    Office of Scientific and Technical Information (OSTI)

    Conference: Improving Building Envelope and Duct Airtightness of US Dwellings - the Current State of Energy Retrofits Citation Details In-Document Search Title: Improving Building...

  3. FDR for non destructive evaluation: inspection of external post-tensioned ducts and measurement of water content in concrete

    E-Print Network [OSTI]

    Boyer, Edmond

    of water content in concrete F. Visco-Comandini(1) , T. Bore(2) , G. Six(1) , F. Sagnard(1) , S. Delepine water content assessment technologies [18]. Another example concerns the bridges which include "external of post tensioned ducts or to measure the water content in concrete, we propose a structural health

  4. Tips: Air Ducts | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:Financing ToolInternational Affairs,Department of EnergyPROGRAM TheMetalThomasPhaseofAir Ducts

  5. Shape memory alloy seals for geothermal applications

    SciTech Connect (OSTI)

    Friske, Warren H.; Schwartzbart, Harry

    1982-10-08

    Rockwell International's Energy Systems Group, under contract to Brookhaven National Laboratory, has completed a 2-year program to develop a novel temperature-actuated seal concept for geothermal applications. This seal concept uses the unique properties of a shape memory alloy (Nitinol) to perform the sealing function. The several advantages of the concept are discussed in the paper. Demonstration tests of both face and shaft seals have shown that leaktight seals are feasible. Supporting materials studies have included corrosion tests in geothermal fluids, elevated temperature tensile tests, experimental electroplating and metallographic evaluations of microstructures.

  6. Double angle seal forming lubricant film

    DOE Patents [OSTI]

    Ernst, William D. (Troy, NY)

    1984-01-01

    A lubricated piston rod seal which inhibits gas leaking from a high pressure chamber on one side of the seal to a low pressure chamber on the other side of the seal. A liquid is supplied to the surface of the piston rod on the low pressure side of the seal. This liquid acts as lubricant for the seal and provides cooling for the rod. The seal, which can be a plastic, elastomer or other material with low elastic modulus, is designed to positively pump lubricant through the piston rod/seal interface in both directions when the piston rod is reciprocating. The capacity of the seal to pump lubricant from the low pressure side to the high pressure side is less than its capacity to pump lubricant from the high pressure side to the low pressure side which ensures that there is zero net flow of lubricant to the high pressure side of the seal. The film of lubricant between the seal and the rod minimizes any sliding contact and prevents the leakage of gas. Under static conditions gas leakage is prevented by direct contact between the seal and the rod.

  7. Numerically-based ducted propeller design using vortex lattice lifting line theory

    E-Print Network [OSTI]

    Stubblefield, John M

    2008-01-01

    This thesis used vortex lattice lifting line theory to model an axisymmetrical-ducted propeller with no gap between the duct and the propeller. The theory required to model the duct and its interaction with the propeller ...

  8. DEVELOPING FLOW AND HEAT TRANSFER IN STRONGLY CURVED DUCTS OF RECTANGULAR CROSS-SECTION

    E-Print Network [OSTI]

    Yee, G.

    2010-01-01

    123. HUMPHREY, J.A.C. , "Flow in Ducts with Curvature andViscous Flow in Curved Ducts of Rectangular Cross-Sections,"Laminar Flow in a Square Duct of Strong Curvature,1I J.

  9. Contributions to the theory of soundpropagation in ducts with bulk-reacting lining

    E-Print Network [OSTI]

    Rienstra, Sjoerd W.

    Contributions to the theory of soundpropagation in ducts with bulk-reacting lining S.W. Rienstra interfaceduct/liner modalamplitudeductfield outer radius duct with liner modalamplitudelinerfield wavenumber duct radial wavenumber liner axial wavenumber smallparameter ratioradialpressuregradientsat

  10. The Delta Q method of testing the air leakage of ducts

    E-Print Network [OSTI]

    Walker, I.S.; Dickerhoff, D.J.; Sherman, M.H.

    2002-01-01

    2001. Development of a new duct leakage test: DeltaQ. L B Nin the DeltaQ test for Duct Leakage. Brookhaven Nationalof the DeltaQ test for Duct Leakage. Proc. A C E E E 2002

  11. Duct Systems in large commercial buildings: Physical characterization, air leakage, and heat conduction gains

    E-Print Network [OSTI]

    Fisk, W.J.

    2011-01-01

    LBNL-42339 Duct Systems in Large Commercial Buildings:and conduction heat gains of duct systems. Different methodscompared. ELAs-of supply ducts ranged from 0.4 to 2.0 cm 2

  12. Effects of Duct Improvement and ENERGYSTAR Equipment on Comfort and Energy Efficiency

    E-Print Network [OSTI]

    LBNL 43723 Effects of Duct Improvement and ENERGYSTAR Equipment on Comfort and Energy Efficiency I................................................................................................................................................ 5 DUCT LEAKAGE AND ENERGYSTAR EQUIPMENT EFFECTS ON COMFORT .................................... 5).......................................................................................................9 Duct leakage by pressurization

  13. Rotary seal with improved film distribution

    DOE Patents [OSTI]

    Dietle, Lannie Laroy; Schroeder, John Erick

    2013-10-08

    The present invention is a generally circular rotary seal that establishes sealing between relatively rotatable machine components for lubricant retention and environmental exclusion, and incorporates seal geometry that interacts with the lubricant during relative rotation to distribute a lubricant film within the dynamic sealing interface. The features of a variable inlet size, a variable dynamic lip flank slope, and a reduction in the magnitude and circumferentially oriented portion of the lubricant side interfacial contact pressure zone at the narrowest part of the lip, individually or in combination thereof, serve to maximize interfacial lubrication in severe operating conditions, and also serve to minimize lubricant shear area, seal torque, seal volume, and wear, while ensuring retrofitability into the seal grooves of existing equipment.

  14. Rotary seal with improved film distribution

    DOE Patents [OSTI]

    Dietle, Lannie Laroy; Schroeder, John Erick

    2015-09-01

    The present invention is a generally circular rotary seal that establishes sealing between relatively rotatable machine components for lubricant retention and environmental exclusion, and incorporates seal geometry that interacts with the lubricant during relative rotation to distribute a lubricant film within the dynamic sealing interface. The features of a variable inlet size, a variable dynamic lip flank slope, and a reduction in the magnitude and circumferentially oriented portion of the lubricant side interfacial contact pressure zone at the narrowest part of the lip, individually or in combination thereof, serve to maximize interfacial lubrication in severe operating conditions, and also serve to minimize lubricant shear area, seal torque, seal volume, and wear, while ensuring retrofitability into the seal grooves of existing equipment.

  15. Shape memory alloy seals for geothermal applications

    SciTech Connect (OSTI)

    Not Available

    1985-09-15

    A shape memory radial seal was fabricated with a ''U'' cross section. Upon heating the seal recovered its original ''V'' shape and produced a high pressure seal. The sealing pressure which can be developed is approximately 41 MPa (60,000 psi), well in excess of the pressure which can be produced in conventional elastomeric seals. The low modulus martensite can conform readily to the sealing surface, and upon recovery produce a seal capable of high pressure fluid or gas confinement. The corrosion resistance of nickel-titanium in a broad range of aggressive fluids has been well established and, as such, there is little doubt that, had time permitted, a geothermal pump of flange fluid tried would have been successful.

  16. Slow sound in lined flow ducts

    E-Print Network [OSTI]

    Auregan, Yves

    2015-01-01

    We consider the acoustic propagation in lined flow duct with a purely reactive impedance at the wall. This reacting liner has the capability to reduce the speed of sound, and thus to enhance the interaction between the acoustic propagation and the low Mach number flow ($M\\simeq0.3$). At the lower frequencies, there are typically 4 acoustic or hydrodynamic propagating modes, with 3 of them propagating in the direction of the flow. Above a critical frequency, there are only 2 propagating modes that all propagate in the direction of the flow. From the exact 2D formulation an approximate 1D model is developed to study the scattering of acoustic waves in a straight duct with varying wall impedance. This simple system, with a uniform flow and with a non-uniform liner impedance at the wall, permits to study the scattering between regions with different waves characteristics. Several situations are characterized to show the importance of negative energy waves, strong interactions between acoustic and hydrodynamic mod...

  17. Economizer Applications in Dual-Duct Air-Handling Units 

    E-Print Network [OSTI]

    Joo, I.; Liu, M.

    2002-01-01

    for dual-fan, dual-duct air-handling units. The economizer has significant heating energy penalties for single-fan, dual-duct air-handling units. The penalties are higher than the cooling energy savings when the cold airflow is less than the hot airflow...

  18. SOFC Interconnect and Compressive Seal Development at PNNL

    SciTech Connect (OSTI)

    Chou, Y S.; Yang, Z Gary; Singh, Prabhakar; Stevenson, Jeffry W.; Xia, Gordon

    2005-11-01

    The development of solid oxide fuel cell (SOFC) technology represents an opportunity to achieve significant improvements in energy conversion efficiency and reduction of undesirable emissions. However, many technical challenges still need to be overcome before the utilization of the advantages of SOFC can take place. These challenges include the need for improved interconnects and seals for planar SOFC stacks. In this paper, we briefly summarize recent progress at PNNL in these two research areas.

  19. Core disruptive accident margin seal

    DOE Patents [OSTI]

    Garin, John (Oak Ridge, TN)

    1978-01-01

    An apparatus for sealing the annulus defined between a substantially cylindrical rotatable first riser assembly and plug combination disposed in a substantially cylindrical second riser assembly and plug combination of a nuclear reactor system. The apparatus comprises a flexible metal member having a first side attached to one of the riser components and a second side extending toward the other riser component and an actuating mechanism attached to the flexible metal member while extending to an accessible location. When the actuating mechanism is not activated, the flexible metal member does not contact the other riser component thus allowing the free rotation of the riser assembly and plug combination. When desired, the actuating mechanism causes the second side of the flexible metal member to contact the other riser component thereby sealing the annulus between the components.

  20. Management of Disused Sealed Sources in Hungary - 13077

    SciTech Connect (OSTI)

    Kapitany, Sandor

    2013-07-01

    Since 1976 the spent and disused radioactive sources arisen in Hungary are stored in a central storage facility called Radioactive Waste Treatment and Disposal Facility operated by Public Limited Company for Radioactive Waste Management. The Facility is responsible for the record keeping, the waste acceptance procedure, the shipment and the storage or disposal (whether a certain source meets the waste acceptance criteria for disposal or not) of sources. Based on the more than 35 year old operation of the facility many experiences have been gathered regarding the technology for long-term storage of sources, the attitude of the users of sources, the evolution of the legislation and the national record keeping system. Recently a new legislation for the security of radioactive materials (including sources) was introduced, first in Central-Europe. It requires special security arrangements from the facility for transport and for storage. Due to the ongoing retrieval of radioactive waste formerly disposed of, partly containing sealed sources, there is a new challenge in the physical inventory control of historical waste. The paper would show the effect of the changes in the legislation system of record keeping or security on the users' attitude for discard of sources and on the management of the sources in the facility. The facility has a unique storage technology (shallow boreholes) in the narrow region. The sealed sources are placed into vertical pipes sunk into the surface. In the beginning, each of the sources were dropped into the pipe directly, recently they are placed in a metal tube first ensuring the retrieval. The lessons learned will be presented. There were several issues to introduce the new security arrangements (partly financially supported by US DOE) for storage and for transportation of sealed sources. These issues are addressed. In the past part of the sealed sources were disposed together with solid radioactive waste packaged in plastic bags. A waste retrieval campaign was fulfilled in 2008 to retrieve the sealed sources. The paper demonstrates the conditions of sealed sources after twenty-year disposal period. As a summary, the paper will share the main experiences of a 35-year old facility, managing radioactive sealed sources in Central Europe. (authors)

  1. Duct thermal performance models for large commercial buildings

    SciTech Connect (OSTI)

    Wray, Craig P.

    2003-10-01

    Despite the potential for significant energy savings by reducing duct leakage or other thermal losses from duct systems in large commercial buildings, California Title 24 has no provisions to credit energy-efficient duct systems in these buildings. A substantial reason is the lack of readily available simulation tools to demonstrate the energy-saving benefits associated with efficient duct systems in large commercial buildings. The overall goal of the Efficient Distribution Systems (EDS) project within the PIER High Performance Commercial Building Systems Program is to bridge the gaps in current duct thermal performance modeling capabilities, and to expand our understanding of duct thermal performance in California large commercial buildings. As steps toward this goal, our strategy in the EDS project involves two parts: (1) developing a whole-building energy simulation approach for analyzing duct thermal performance in large commercial buildings, and (2) using the tool to identify the energy impacts of duct leakage in California large commercial buildings, in support of future recommendations to address duct performance in the Title 24 Energy Efficiency Standards for Nonresidential Buildings. The specific technical objectives for the EDS project were to: (1) Identify a near-term whole-building energy simulation approach that can be used in the impacts analysis task of this project (see Objective 3), with little or no modification. A secondary objective is to recommend how to proceed with long-term development of an improved compliance tool for Title 24 that addresses duct thermal performance. (2) Develop an Alternative Calculation Method (ACM) change proposal to include a new metric for thermal distribution system efficiency in the reporting requirements for the 2005 Title 24 Standards. The metric will facilitate future comparisons of different system types using a common ''yardstick''. (3) Using the selected near-term simulation approach, assess the impacts of duct system improvements in California large commercial buildings, over a range of building vintages and climates. This assessment will provide a solid foundation for future efforts that address the energy efficiency of large commercial duct systems in Title 24. This report describes our work to address Objective 1, which includes a review of past modeling efforts related to duct thermal performance, and recommends near- and long-term modeling approaches for analyzing duct thermal performance in large commercial buildings.

  2. Seal for fluid forming tools

    DOE Patents [OSTI]

    Golovashchenko, Sergey Fedorovich (Beverly Hills, MI); Bonnen, John Joseph Francis (Milford, MI)

    2012-03-20

    An electro-hydraulic forming tool for forming a sheet metal blank in a one-sided die has first and second rigid rings that engage opposite sides of a sheet metal blank. The rigid rings are contained within slots on a die portion and a hydraulic force applicator portion of the forming tool. The seals are either resiliently biased by an elastomeric member or inherently resiliently biased into contact with the blank.

  3. Prioritizing Climate Change Mitigation Alternatives: Comparing Transportation Technologies to Options in Other Sectors

    E-Print Network [OSTI]

    Lutsey, Nicholas P.

    2008-01-01

    Natural gas Technology Dry Seals on Centrifugal Compressors (P&T) Fuel Gas Retrofit for Blowdown Valve

  4. REGULATION OF LIPID METABOLISM AND MILK LIPID CONTENT IN NORTHERN ELEPHANT SEALS

    E-Print Network [OSTI]

    Fowler, Melinda Anne

    2012-01-01

    Life history of the Hawaiian monk seal. Pacific Science 13 (seals and Hawaiian and Mediterranean monk seals and Ross

  5. Duct Leakage Modeling in EnergyPlus and Analysis of Energy Savings from Implementing SAV with InCITeTM

    SciTech Connect (OSTI)

    Wray, Craig; Sherman, Max

    2010-03-01

    This project addressed two significant deficiencies in air-handling systems for large commercial building: duct leakage and duct static pressure reset. Both constitute significant energy reduction opportunities for these buildings. The overall project goal is to bridge the gaps in current duct performance modeling capabilities, and to expand our understanding of air-handling system performance in California large commercial buildings. The purpose of this project is to provide technical support for the implementation of a duct leakage modeling capability in EnergyPlus, to demonstrate the capabilities of the new model, and to carry out analyses of field measurements intended to demonstrate the energy saving potential of the SAV with InCITeTM duct static pressure reset (SPR) technology. A new duct leakage model has been successfully implemented in EnergyPlus, which will enable simulation users to assess the impacts of leakage on whole-building energy use and operation in a coupled manner. This feature also provides a foundation to support code change proposals and compliance analyses related to Title 24 where duct leakage is an issue. Our example simulations continue to show that leaky ducts substantially increase fan power: 10percent upstream and 10percent downstream leakage increases supply fan power 30percent on average compared to a tight duct system (2.5percent upstream and 2.5percent downstream leakage). Much of this increase is related to the upstream leakage rather than to the downstream leakage. This does not mean, however, that downstream leakage is unimportant. Our simulations also demonstrate that ceiling heat transfer is a significant effect that needs to be included when assessing the impacts of duct leakage in large commercial buildings. This is not particularly surprising, given that ?ceiling regain? issues have already been included in residential analyses as long as a decade ago (e.g., ASHRAE Standard 152); mainstream simulation programs that are used for large commercial building energy analyses have not had this capability until now. Our analyses of data that we collected during our 2005 tests of the SAV with InCITeTM duct static pressure reset technology show that this technology can substantially reduce fan power (in this case, by about 25 to 30percent). Tempering this assessment, however, is that cooling and heating coil loads were observed to increase or decrease significantly depending on the time window used. Their impact on cooling and heating plant power needs to be addressed in future studies; without translating the coil loads to plant equipment energy use, it is not possible to judge the net impact of this SPR technology on whole-building energy use. If all of the loads had decreased, such a step would not be as necessary.

  6. Transition to turbulence in duct flow

    E-Print Network [OSTI]

    Biau, Damien; Bottaro, Alessandro; 10.1017/S0022112007009536

    2010-01-01

    The transition of the flow in a duct of square cross-section is studied. Like in the similar case of the pipe flow, the motion is linearly stable for all Reynolds numbers; this flow is thus a good candidate to investigate the 'bypass' path to turbulence. Initially the so-called 'linear optimal perturbation problem' is formulated and solved, yielding optimal disturbances in the form of longitudinal vortices. Such optimals, however, fail to elicit a significant response from the system in the nonlinear regime. Thus, streamwise-inhomogeneous, sub-optimal disturbances are focussed upon; nonlinear quadratic interactions are immediately evoked by such initial perturbations and an unstable streamwise-homogeneous large amplitude mode rapidly emerges. The subsequent evolution of the flow, at a value of the Reynolds number at the edge between fully developed turbulence and relaminarization, shows the alternance of patterns with two pairs of large scale vortices near opposing parallel walls. Such edge states bear a rese...

  7. Preliminary Notice of Violation, National Security Technologies...

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

    August 11, 2011 Issued to National Security Technologies, LLC related to Deficiencies in Inspection and Installation of Penetration Fire Seals and Other Components at the Nevada...

  8. An Internal Coaxil Cable Seal System

    DOE Patents [OSTI]

    Hall, David R. (Provo, UT); Hall, Jr., H. Tracy (Provo, UT); Pixton, David (Lehi, UT); Dahlgren, Scott (Provo, UT); Sneddon, Cameron (Provo, UT); Briscoe, Michael (Lehi, UT); Fox, Joe (Spanish Fork, UT)

    2004-12-23

    The invention is a seal system for a coaxial cable more specifically an internal seal system placed within the coaxial cable and its constituent components. A series of seal stacks including flexible rigid rings and elastomeric rings are placed on load bearing members within the coaxial cable. The current invention is adapted to seal the annular space between the coaxial cable and an electrical contact passing there through. The coaxial cable is disposed within drilling components to transmit electrical signals between drilling components within a drill string. During oil and gas exploration, a drill string can see a range of pressures and temperatures thus resulting in multiple combinations of temperature and pressure and increasing the difficulty of creating a robust seal for all combinations. The seal system can be used in a plurality of downhole components, such as sections of pipe in a drill string, drill collars, heavy weight drill pipe, and jars.

  9. Wet powder seal for gas containment

    DOE Patents [OSTI]

    Stang, Louis G. (Sayville, NY)

    1982-01-01

    A gas seal is formed by a compact layer of an insoluble powder and liquid filling the fine interstices of that layer. The smaller the particle size of the selected powder, such as sand or talc, the finer will be the interstices or capillary spaces in the layer and the greater will be the resulting sealing capacity, i.e., the gas pressure differential which the wet powder layer can withstand. Such wet powder seal is useful in constructing underground gas reservoirs or storage cavities for nuclear wastes as well as stopping leaks in gas mains buried under ground or situated under water. The sealing capacity of the wet powder seal can be augmented by the hydrostatic head of a liquid body established over the seal.

  10. Technology Solutions Case Study: High-Performance Ducts in Hot...

    Office of Scientific and Technical Information (OSTI)

    Gas & Electric Company initiated a project with Davis Energy Group (lead for the Building America team, Alliance for Residential Building Innovation) to solicit builder...

  11. Technology Solutions Case Study: High-Performance Ducts in Hot...

    Office of Scientific and Technical Information (OSTI)

    the conditioned thermal envelope. To support this activity, in 2013 the Pacific Gas & Electric Company initiated a project with Davis Energy Group (lead for the Building...

  12. Liquid sodium dip seal maintenance system

    DOE Patents [OSTI]

    Briggs, Richard L. (Hempfield Township, Westmoreland County, PA); Meacham, Sterling A. (Hempfield Township, Westmoreland County, PA)

    1980-01-01

    A system for spraying liquid sodium onto impurities associated with liquid dip seals of nuclear reactors. The liquid sodium mixing with the impurities dissolves the impurities in the liquid sodium. The liquid sodium having dissolved and diluted the impurities carries the impurities away from the site thereby cleaning the liquid dip seal and surrounding area. The system also allows wetting of the metallic surfaces of the dip seal thereby reducing migration of radioactive particles across the wetted boundary.

  13. Thermo-Hydrodynamic analysis of turbulent cryogenic eccentric annular seals and effects of seal flexibility 

    E-Print Network [OSTI]

    Venkataraman, Balaji

    1995-01-01

    of these pumps depend significantly on the rotordynamic features of hardware elements such as the seals and bearings. The focus of this research effort is to develop a comprehensive thermo-elasto-hydrodynamic analysis of turbulent liquid annular seals...

  14. Effects of operating damage of labyrinth seal on seal leakage and wheelspace hot gas ingress 

    E-Print Network [OSTI]

    Xu, Jinming

    2007-09-17

    The labyrinth seal is widely used in turbomachinery to minimize or control leakage between areas of different pressure. The present investigation numerically explored the effect of damage and wear of the labyrinth seal on ...

  15. Analytical and experimental investigations of a labyrinth seal test rig and damper seals for turbomachinery 

    E-Print Network [OSTI]

    Shultz, Richard Raymond

    1997-01-01

    Rotating shaft seals, such as labyrinth seals, are used in high speed turbomachinery including aircraft gas turbine engines and industrial centrifugal compressors. Analysis, design, and testing of a non-rotating cantilever ...

  16. THE SEALS, SEA-LIONS, AND SEA OTTER OF

    E-Print Network [OSTI]

    hispida (RINGED SEAL) Erignathus barbatus (BEARDED SEAL) Monachus schauinslandi (HAWAIIAN MONK SEAL the title implies that these animals are to be found along the Pacific Coast, one species, the monk sealTHE SEALS, SEA-LIONS, AND SEA OTTER OF THE PACIFIC COAST Marine Biological Laboratory OODS HOLE

  17. A NUMERICAL AND EXPERIMENTAL STUDY OF WINDBACK SEALS 

    E-Print Network [OSTI]

    Lim, Chae H.

    2010-01-16

    Windback seals work similarly to labyrinth seals except for the effect of helical groove. These seals are essentially a tooth on stator or tooth on rotor labyrinth seal where the grooves are a continuous helical cut like a thread. Windback seals...

  18. Quick-sealing design for radiological containment

    SciTech Connect (OSTI)

    Rampdla, D.S.; Speer, E.

    1991-11-05

    This patent describes a quick-sealing assembly and method for forming an adhesive seal on opposite sides of a mechanical seal for a flexible containment bag of the type used for working with radioactively contaminated objects. The assembly includes an elongated mechanical fastener having opposing engaging members affixed at a predetermined distance from each of the elongated edges, with an adhesive layer formed between the mechanical fastener and the elongated edge such that upon engagement of the mechanical fastener and adhesive layers to opposing containment fabric, a neat triple hermetic seal is formed.

  19. Quick-sealing design for radiological containment

    SciTech Connect (OSTI)

    Rampolia, D.S.; Speer, E.

    1990-04-10

    This patent describes a quick-sealing assembly and method for forming an adhesive seal on opposite sides of a mechanical seal for a flexible containment bag of the type used for working with radioactively contaminated objects. The assembly includes an elongated mechanical fastener having opposing engaging members affixed at a predetermined distance from each of the elongated edges, with an adhesive layer formed between the mechanical fastener and the elongated edge such that upon engagement of the mechanical fastener and adhesive layers to opposing containment fabric, a neat triple hermetic seal is formed.

  20. Quick-sealing design for radiological containment

    DOE Patents [OSTI]

    Rampolla, Donald S. (Pittsburgh, PA); Speer, Elmer (Ruffsdale, PA)

    1991-01-01

    A quick-sealing assembly and method for forming an adhesive seal on opposite sides of a mechanical seal for a flexible containment bag of the type used for working with radioactively contaminated objects. The assembly includes an elongated mechanical fastener having opposing engaging members affixed at a predetermined distance from each of the elongated edges, with an adhesive layer formed between the mechanical fastener and the elongated edge such that upon engagement of the mechanical fastener and adhesive layers to opposing containment fabric, a neat triple hermetic seal is formed.

  1. Quick-sealing design for radiological containment

    DOE Patents [OSTI]

    Rampolia, Donald S. (Pittsburgh, PA); Speer, Elmer (Ruffsdale, PA)

    1990-01-01

    A quick-sealing assembly and method for forming an adhesive seal on opposite sides of a mechanical seal for a flexible containment bag of the type used for working with radioactively contaminated objects. The assembly includes an elongated mechanical fastener having opposing engaging members affixed at a predetermined distance from each of the elongated edges, with an adhesive layer formed between the mechanical fastener and the elongated edge such that upon engagement of the mechanical fastener and adhesive layers to opposing containment fabric, a neat triple hermetic seal is formed.

  2. Ceramic blade with tip seal

    DOE Patents [OSTI]

    Glezer, B.; Bhardwaj, N.K.; Jones, R.B.

    1997-08-05

    The present gas turbine engine includes a disc assembly defining a disc having a plurality of blades attached thereto. The disc has a preestablished rate of thermal expansion and the plurality of blades have a preestablished rate of thermal expansion being less than the preestablished rate of thermal expansion of the disc. A shroud assembly is attached to the gas turbine engine and is spaced from the plurality of blades a preestablished distance forming an interface there between. Positioned in the interface is a seal having a preestablished rate of thermal expansion being generally equal to the rate of thermal expansion of the plurality of blades. 4 figs.

  3. Shim for sealing transition pieces

    DOE Patents [OSTI]

    Lacy, Benjamin Paul (Greer, SC); Demiroglu, Mehmet (Troy, NY); Sarawate, Neelesh Nandkumar (Niskayuna, NY)

    2012-07-24

    According to one aspect of the invention, a shim for sealing two adjacent turbine transition pieces is disclosed. The shim includes a circumferential member that includes a first lateral flange and a second lateral flange. Further, the first and second lateral flanges each comprise a tab configured to mate to a first surface plane and the first and second lateral flanges are configured to mate to a second surface plane, wherein the first and second surface planes are substantially parallel. In addition, the shim includes a first flange extending substantially perpendicular from the circumferential member.

  4. A CLASSIFICATION OF DUCT MODES BASED ON SURFACE WAVES Sjoerd W. Rienstra

    E-Print Network [OSTI]

    Eindhoven, Technische Universiteit

    A CLASSIFICATION OF DUCT MODES BASED ON SURFACE WAVES Sjoerd W. Rienstra Department of Mathematics For the relatively high frequencies relevant in a turbofan engine duct the modes of a lined sec- tion may be classified in two categories: genuine acoustic 3D duct modes resulting from the finiteness of the duct

  5. Efficient Computation of Spinning Modal Radiation Through an Engine Bypass Duct

    E-Print Network [OSTI]

    Huang, Xun

    Efficient Computation of Spinning Modal Radiation Through an Engine Bypass Duct Xun Huang, Xiaoxian out of a duct with flow. The sound propagation inside a generic engine bypass duct, refractions compared on a canonical case of sound propagation out of a semi-infinite duct with flow. Good agreements

  6. A CLASSIFICATION OF DUCT MODES BASED ON SURFACE WAVES Sjoerd W. Rienstra

    E-Print Network [OSTI]

    Eindhoven, Technische Universiteit

    A CLASSIFICATION OF DUCT MODES BASED ON SURFACE WAVES Sjoerd W. Rienstra Department of Mathematics For the relatively high frequencies relevant in a turbofan engine duct the modes of a lined sec­ tion may be classified in two categories: genuine acoustic 3D duct modes resulting from the finiteness of the duct

  7. STABILITY ANALYSIS FOR BUOYANCY-OPPOSED FLOWS IN POLOIDAL DUCTS OF THE DCLL BLANKET

    E-Print Network [OSTI]

    Abdou, Mohamed

    STABILITY ANALYSIS FOR BUOYANCY-OPPOSED FLOWS IN POLOIDAL DUCTS OF THE DCLL BLANKET N. Vetcha, S, the most of heat deposition and tritium breeding occur in the poloidal ducts facing the plasma (front ducts flows in the long poloidal ducts are comparable with or can even dominate over forced flows, thus

  8. A strategy to seal exploratory boreholes in unsaturated tuff; Yucca Mountain Site Characterization Project

    SciTech Connect (OSTI)

    Fernandez, J.A.; Case, J.B.; Givens, C.A.; Carney, B.C.

    1994-04-01

    This report presents a strategy for sealing exploratory boreholes associated with the Yucca Mountain Site Characterization Project. Over 500 existing and proposed boreholes have been considered in the development of this strategy, ranging from shallow (penetrating into alluvium only) to deep (penetrating into the groundwater table). Among the comprehensive list of recommendations are the following: Those boreholes within the potential repository boundary and penetrating through the potential repository horizon are the most significant boreholes from a performance standpoint and should be sealed. Shallow boreholes are comparatively insignificant and require only nominal sealing. The primary areas in which to place seals are away from high-temperature zones at a distance from the potential repository horizon in the Paintbrush nonwelded tuff and the upper portion of the Topopah Spring Member and in the tuffaceous beds of the Calico Hills Unit. Seals should be placed prior to waste emplacement. Performance goals for borehole seals both above and below the potential repository are proposed. Detailed construction information on the boreholes that could be used for future design specifications is provided along with a description of the environmental setting, i.e., the geology, hydrology, and the in situ and thermal stress states. A borehole classification scheme based on the condition of the borehole wall in different tuffaceous units is also proposed. In addition, calculations are presented to assess the significance of the boreholes acting as preferential pathways for the release of radionuclides. Design calculations are presented to answer the concerns of when, where, and how to seal. As part of the strategy development, available technologies to seal exploratory boreholes (including casing removal, borehole wall reconditioning, and seal emplacement) are reviewed.

  9. High thermal expansion, sealing glass

    DOE Patents [OSTI]

    Brow, Richard K. (Albuquerque, NM); Kovacic, Larry (Albuquerque, NM)

    1993-01-01

    A glass composition for hermetically sealing to high thermal expansion materials such as aluminum alloys, stainless steels, copper, and copper/beryllium alloys, which includes between about 10 and about 25 mole percent Na.sub.2 O, between about 10 and about 25 mole percent K.sub.2 O, between about 5 and about 15 mole percent Al.sub.2 O.sub.3, between about 35 and about 50 mole percent P.sub.2 O.sub.5 and between about 5 and about 15 mole percent of one of PbO, BaO, and mixtures thereof. The composition, which may also include between 0 and about 5 mole percent Fe.sub.2 O.sub.3 and between 0 and about 10 mole percent B.sub.2 O.sub.3, has a thermal expansion coefficient in a range of between about 160 and 210.times.10-7/.degree.C. and a dissolution rate in a range of between about 2.times.10.sup.- 7 and 2.times.10.sup.-9 g/cm.sup.2 -min. This composition is suitable to hermetically seal to metallic electrical components which will be subjected to humid environments over an extended period of time.

  10. High thermal expansion, sealing glass

    DOE Patents [OSTI]

    Brow, R.K.; Kovacic, L.

    1993-11-16

    A glass composition is described for hermetically sealing to high thermal expansion materials such as aluminum alloys, stainless steels, copper, and copper/beryllium alloys, which includes between about 10 and about 25 mole percent Na[sub 2]O, between about 10 and about 25 mole percent K[sub 2]O, between about 5 and about 15 mole percent Al[sub 2]O[sub 3], between about 35 and about 50 mole percent P[sub 2]O[sub 5] and between about 5 and about 15 mole percent of one of PbO, BaO, and mixtures thereof. The composition, which may also include between 0 and about 5 mole percent Fe[sub 2]O[sub 3] and between 0 and about 10 mole percent B[sub 2]O[sub 3], has a thermal expansion coefficient in a range of between about 160 and 210[times]10[sup [minus]7]/C and a dissolution rate in a range of between about 2[times]10[sup [minus]7] and 2[times]10[sup [minus]9]g/cm[sup 2]-min. This composition is suitable to hermetically seal to metallic electrical components which will be subjected to humid environments over an extended period of time.

  11. Innovative Self-Healing Seals for Solid Oxide Fuel Cells (SOFC)

    SciTech Connect (OSTI)

    Raj Singh

    2012-06-30

    Solid oxide fuel cell (SOFC) technology is critical to several national initiatives. Solid State Energy Conversion Alliance (SECA) addresses the technology needs through its comprehensive programs on SOFC. A reliable and cost-effective seal that works at high temperatures is essential to the long-term performance of the SOFC for 40,000 hours at 800°C. Consequently, seals remain an area of highest priority for the SECA program and its industry teams. An innovative concept based on self-healing glasses was advanced and successfully demonstrated through seal tests for 3000 hours and 300 thermal cycles to minimize internal stresses under both steady state and thermal transients for making reliable seals for the SECA program. The self-healing concept requires glasses with low viscosity at the SOFC operating temperature of 800°C but this requirement may lead to excessive flow of the glass in areas forming the seal. To address this challenge, a modification to glass properties by addition of particulate fillers is pursued in the project. The underlying idea is that a non-reactive ceramic particulate filler is expected to form glass-ceramic composite and increase the seal viscosity thereby increasing the creep resistance of the glass-composite seals under load. The objectives of the program are to select appropriate filler materials for making glass-composite, fabricate glass-composites, measure thermal expansion behaviors, and determine stability of the glass-composites in air and fuel environments of a SOFC. Self-healing glass-YSZ composites are further developed and tested over a longer time periods under conditions typical of the SOFCs to validate the long-term stability up to 2000 hours. The new concepts of glass-composite seals, developed and nurtured in this program, are expected to be cost-effective as these are based on conventional processing approaches and use of the inexpensive materials.

  12. Rotordynamic characteritics of incompressible-flow labyrinth seals 

    E-Print Network [OSTI]

    Ghali, Anupama

    1993-01-01

    A finite-element-based perturbation model, initially developed for straight annular seals, has been extended to the labyrinth seal problem. The rotordynamic coefficients for two different labyrinth seal configurations, namely those of one- and five...

  13. Evaluation of Steam Turbines Triangular Tooth on Stator Labyrinth Seal 

    E-Print Network [OSTI]

    Tanvir, Hossain Ahmed

    2012-07-16

    Labyrinth seals are often utilized in locations where contact seals cannot be utilized due to the large displacements of the rotating shaft. The performance evaluation of a labyrinth seal is very important to make sure ...

  14. DOE Zero Energy Ready Home Webinar: Ducts in Conditioned Space

    Broader source: Energy.gov [DOE]

    DOE Challenge Home is a blueprint for zero energy ready homes.  When we make that statement – it’s impossible to justify huge thermal losses from ducts in unconditioned spaces.  That’s why one of...

  15. The Effects of Geometry on Flexible Duct CFD Simulations 

    E-Print Network [OSTI]

    Ugursal, A.; Culp, C.

    2008-01-01

    dynamics (CFD) simulations allow variable configurations and are emerging as an alternative to laboratory measurements. Issues with the CFD simulations of flexible ducts have been modeling the complex geometry and the computational requirements to complete...

  16. Ducting arrangement for cooling a gas turbine structure

    DOE Patents [OSTI]

    Lee, Ching-Pang; Morrison, Jay A.

    2015-07-21

    A ducting arrangement (10) for a can annular gas turbine engine, including: a duct (12, 14) disposed between a combustor (16) and a first row of turbine blades and defining a hot gas path (30) therein, the duct (12, 14) having raised geometric features (54) incorporated into an outer surface (80); and a flow sleeve (72) defining a cooling flow path (84) between an inner surface (78) of the flow sleeve (72) and the duct outer surface (80). After a cooling fluid (86) traverses a relatively upstream raised geometric feature (90), the inner surface (78) of the flow sleeve (72) is effective to direct the cooling fluid (86) toward a landing (94) separating the relatively upstream raised geometric feature (90) from a relatively downstream raised geometric feature (94).

  17. Measure Guideline: Buried and/or Encapsulated Ducts

    SciTech Connect (OSTI)

    Shapiro, C.; Zoeller, W.; Mantha, P.

    2013-08-01

    Buried and/or encapsulated ducts (BEDs) are a class of advanced, energy-efficiency strategies intended to address the significant ductwork thermal losses associated with ducts installed in unconditioned attics. BEDs are ducts installed in unconditioned attics that are covered in loose-fill insulation and/or encapsulated in closed cell polyurethane spray foam insulation. This Measure Guideline covers the technical aspects of BEDs as well as the advantages, disadvantages, and risks of BEDs compared to other alternative strategies. This guideline also provides detailed guidance on installation of BEDs strategies in new and existing homes through step-by-step installation procedures. Some of the procedures presented here, however, require specialized equipment or expertise. In addition, some alterations to duct systems may require a specialized license.

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

    E-Print Network [OSTI]

    Kumar, Abhinav

    2009-05-15

    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...

  19. Fuel cell separator with compressible sealing flanges

    DOE Patents [OSTI]

    Mientek, A.P.

    1984-03-30

    A separator for separating adjacent fuel cells in a stack of such cells includes a flat, rectangular, gas-impermeable plate disposed between adjacent cells and having two opposite side margins thereof folded back over one side of the plate to form two first seal flanges and having the other side margins thereof folded back over the opposite side of the plate to form two second seal flanges, each of the seal flanges cooperating with the plate to define a channel in which is disposed a resiliently compressible stack of thin metal sheets. The two first seal flanges cooperate with the electrolyte matrix of one of the cells to form a gas-impermeable seal between an electrode of the one cell and one of two reactant gas manifolds. The second seal flanges cooperate with the electrolyte matrix of the other cell for forming a gas-impermeable seal between an electrode of the other cell and the other of the two reactant gas manifolds. The seal flanges cooperate with the associated compressible stacks of sheets for maintaining a spacing between the plate and the electrolyte matrices while accommodating variation of that spacing.

  20. Memorandum, Reporting of Radiological Sealed Sources Transactions

    Broader source: Energy.gov [DOE]

    The requirements for reporting transactions involving radiological sealed sources are identified in Department of Energy (DOE) Notice (N) 234.1, Reporting of Radioactive Sealed Sources. The data reported in accordance with DOE N 234.1 are maintained in the DOE Radiological Source Registry and Tracking (RSRT) database by the Office of Information Management, within the Office of Environment, Health, Safety and Security.

  1. BETTER DUCT SYSTEMS FOR HOME HEATING AND COOLING.

    SciTech Connect (OSTI)

    ANDREWS,J.

    2001-01-01

    This is a series of six guides intended to provide a working knowledge of residential heating and cooling duct systems, an understanding of the major issues concerning efficiency, comfort, health, and safety, and practical tips on installation and repair of duct systems. These guides are intended for use by contractors, system designers, advanced technicians, and other HVAC professionals. The first two guides are also intended to be accessible to the general reader.

  2. Lymphoscintigraphic evaluation of the thoracic duct in the canine 

    E-Print Network [OSTI]

    Hodges, Carlos Cintron

    1990-01-01

    LYMPHOSCINTIGRAPHIC EVALUATION OF THE THORACIC DUCT IN THE CANINE A Thesis by CARLOS CINTRON HODGES Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree of MASTER... OF SCIENCE December 1990 Major Subject: Veterinary Medicine and Surgery LYMPHOSCINTIGRAPHIC EVALUATION OF THE THORACIC DUCT IN THE CANINE A Thesis by CARLOS CINTRON HODGES Approved as to style and content by: H W. Boothe (Chair of Committee) D...

  3. Low thermal expansion seal ring support

    DOE Patents [OSTI]

    Dewis, David W. (San Diego, CA); Glezer, Boris (Del Mar, CA)

    2000-01-01

    Today, the trend is to increase the temperature of operation of gas turbine engines. To cool the components with compressor discharge air, robs air which could otherwise be used for combustion and creates a less efficient gas turbine engine. The present low thermal expansion sealing ring support system reduces the quantity of cooling air required while maintaining life and longevity of the components. Additionally, the low thermal expansion sealing ring reduces the clearance "C","C'" demanded between the interface between the sealing surface and the tip of the plurality of turbine blades. The sealing ring is supported by a plurality of support members in a manner in which the sealing ring and the plurality of support members independently expand and contract relative to each other and to other gas turbine engine components.

  4. WAVE PROPAGATION in the HOT DUCT of VHTR

    SciTech Connect (OSTI)

    Richard Schultz; Jim C. P. Liou

    2013-07-01

    In VHTR, helium from the reactor vessel is conveyed to a power conversion unit through a hot duct. In a hypothesized Depressurized Conduction Cooldown event where a rupture of the hot duct occurs, pressure waves will be initiated and reverberate in the hot duct. A numerical model is developed to quantify the transients and the helium mass flux through the rupture for such events. The flow path of the helium forms a closed loop but only the hot duct is modeled in this study. The lower plum of the reactor vessel and the steam generator are treated as specified pressure and/or temperature boundary to the hot duct. The model is based on the conservation principles of mass, momentum and energy, and on the equations of state for helium. The numerical solution is based on the method of characteristics with specified time intervals with a predictor and corrector algorithm. The rupture sub-model gives reasonable results. Transients induced by ruptures with break area equaling 20%, 10%, and 5% of the duct cross-sectional area are described.

  5. Integrated seal for high-temperature electrochemical device

    DOE Patents [OSTI]

    Tucker, Michael C; Jacobson, Craig P

    2013-07-16

    The present invention provides electrochemical device structures having integrated seals, and methods of fabricating them. According to various embodiments the structures include a thin, supported electrolyte film with the electrolyte sealed to the support. The perimeter of the support is self-sealed during fabrication. The perimeter can then be independently sealed to a manifold or other device, e.g., via an external seal. According to various embodiments, the external seal does not contact the electrolyte, thereby eliminating the restrictions on the sealing method and materials imposed by sealing against the electrolyte.

  6. Spring loaded compliant seal for high temperature use

    SciTech Connect (OSTI)

    Memmen, Robert L; Fedock, John A; Downs, James P

    2013-10-15

    A flexible seal having an X-shaped cross section that forms four contact points on four contact surfaces of two opposed seal slots. The flexible seal is used for a component in which the two seal slots undergo a large deflection such that the opposed slots are not aligned and a rigid seal will not form an adequate seal. The flexible seal can be used in a component of a combustor or a turbine in a gas turbine engine where opposed seal slots undergo the large deflection during operation.

  7. Building America Webinar: Sealing of Home Enclosures with Aerosol...

    Energy Savers [EERE]

    Sealing of Home Enclosures with Aerosol Particles Building America Webinar: Sealing of Home Enclosures with Aerosol Particles This webinar was presented by research team Building...

  8. Application of Innovative Technologies During Continuous Commissioning 

    E-Print Network [OSTI]

    Joo, I. S.; Liu, M.; Wang, J.; Hansen, K.

    2003-01-01

    ,436 square feet was used as a case study building. The new technologies are a variable speed drive volumetric tracking method for building pressure control, a recently developed fan airflow measurement method for duct static pressure reset, and a new...

  9. Ceramic blade with tip seal

    DOE Patents [OSTI]

    Glezer, Boris (Del Mar, CA); Bhardwaj, Narender K. (San Diego, CA); Jones, Russell B. (San Diego, CA)

    1997-01-01

    The present gas turbine engine (10) includes a disc assembly (64) defining a disc (66) having a plurality of blades (70) attached thereto. The disc (66) has a preestablished rate of thermal expansion and the plurality of blades have a preestablished rate of thermal expansion being less than the preestablished rate of thermal expansion of the disc (66). A shroud assembly (100) is attached to the gas turbine engine (10) and is spaced from the plurality of blades (70) a preestablished distance forming an interface (108) therebetween. Positioned in the interface is a seal (110) having a preestablished rate of thermal expansion being generally equal to the rate of thermal expansion of the plurality of blades (70).

  10. Sealing glasses for titanium and titanium alloys

    DOE Patents [OSTI]

    Brow, Richard K. (Albuquerque, NM); McCollister, Howard L. (Albuquerque, NM); Phifer, Carol C. (Albuquerque, NM); Day, Delbert E. (Rolla, MO)

    1997-01-01

    Barium lanthanoborate sealing-glass compositions are provided comprising various combinations (in terms of mole-%) of boron oxide (B.sub.2 O.sub.3), barium oxide (BaO), lanthanum oxide (La.sub.2 O.sub.3), and at least one other oxide selected from the group consisting of aluminum oxide (Al.sub.2 O.sub.3), calcium oxide (CaO), lithium oxide (Li.sub.2 O), sodium oxide (Na.sub.2 O), silicon dioxide (SiO.sub.2), or titanium dioxide (TiO.sub.2). These sealing-glass compositions are useful for forming hermetic glass-to-metal seals with titanium and titanium alloys having an improved aqueous durability and favorable sealing characteristics. Examples of the sealing-glass compositions are provided having coefficients of thermal expansion about that of titanium or titanium alloys, and with sealing temperatures less than about 900.degree. C., and generally about 700.degree.-800.degree. C. The barium lanthanoborate sealing-glass compositions are useful for components and devices requiring prolonged exposure to moisture or water, and for implanted biomedical devices (e.g. batteries, pacemakers, defibrillators, pumps).

  11. Sealing glasses for titanium and titanium alloys

    DOE Patents [OSTI]

    Brow, R.K.; McCollister, H.L.; Phifer, C.C.; Day, D.E.

    1997-07-15

    Barium lanthanoborate sealing-glass compositions are provided comprising various combinations (in terms of mole-%) of boron oxide (B{sub 2}O{sub 3}), barium oxide (BaO), lanthanum oxide (La{sub 2}O{sub 3}), and at least one other oxide selected from the group consisting of aluminum oxide (Al{sub 2}O{sub 3}), calcium oxide (CaO), lithium oxide (Li{sub 2}O), sodium oxide (Na{sub 2}O), silicon dioxide (SiO{sub 2}), or titanium dioxide (TiO{sub 2}). These sealing-glass compositions are useful for forming hermetic glass-to-metal seals with titanium and titanium alloys having an improved aqueous durability and favorable sealing characteristics. Examples of the sealing-glass compositions are provided having coefficients of thermal expansion about that of titanium or titanium alloys, and with sealing temperatures less than about 900 C, and generally about 700--800 C. The barium lanthanoborate sealing-glass compositions are useful for components and devices requiring prolonged exposure to moisture or water, and for implanted biomedical devices (e.g. batteries, pacemakers, defibrillators, pumps). 1 fig.

  12. Tax Credits, Rebates & Savings | Department of Energy

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

    Water Heaters, Programmable Thermostats, CaulkingWeather-stripping, DuctAir sealing, Building Insulation, Windows, Other EE, Yes; specific technologies not identified Otter...

  13. Fiberglass Duct Cleaning Safe Work Practices Duct Cleaning -Prior to reaching a decision to clean a duct, an investigation of possible

    E-Print Network [OSTI]

    de Lijser, Peter

    ­ Locations should be noted prior to conducting work. Lockers, Showers, and Hand Wash Sinks ­ Should to be sure that there are no hazardous containing materials in the duct system such as Asbestos. Asbestos into particulate collection equipment. 3. All equipment located outside should be placed downwind and away from

  14. Gas Seal Leakage at High Temperature: A Labyrinth Seal and an All-Metal Complaint Seal of Similar Clearance 

    E-Print Network [OSTI]

    Anderson, Alain

    2013-07-31

    Reducing secondary leakage is a common challenge in numerous machines, particularly in steam and gas turbines. Too large leakage in seals produces a substantial loss in efficiency and power delivery with an increase in specific fuel consumption...

  15. Laterally Translating Seal Carrier For A Drilling Mud Motor Sealed Bearing Assembly

    DOE Patents [OSTI]

    Dietle, Lannie (Houston, TX)

    1993-03-23

    A sealing and lubrication assembly for rotating shafts intended for operation in an abrasive environment and wherein the rotary shaft may have lateral translation or excursion during its rotation. A housing receives the rotary shaft in bearing supporting relation and defines a lubricant chamber about the shaft. A seal carrier is movably positioned about the rotary shaft and has non-rotatable articulating or laterally translating relation with the housing. A high pressure rotary shaft seal is supported by the seal carrier and maintains bearing and sealing engagement with the rotary shaft during its lateral translation or excursion. The seal carrier is hydraulic force balanced and thus is not subject to pressure induced loads that might otherwise interfere with its articulation or lateral translation.

  16. Measure Guideline: Optimizing the Configuration of Flexible Duct Junction Boxes

    SciTech Connect (OSTI)

    Beach, R.; Burdick, A.

    2014-03-01

    This measure guideline offers additional recommendations to heating, ventilation, and air conditioning (HVAC) system designers for optimizing flexible duct, constant-volume HVAC systems using junction boxes within Air Conditioning Contractors of America (ACCA) Manual D guidance (Rutkowski, H. Manual D -- Residential Duct Systems, 3rd edition, Version 1.00. Arlington, VA: Air Conditioning Contractors of America, 2009.). IBACOS used computational fluid dynamics software to explore and develop guidance to better control the airflow effects of factors that may impact pressure losses within junction boxes among various design configurations (Beach, R., Prahl, D., and Lange, R. CFD Analysis of Flexible Duct Junction Box Design. Golden, CO: National Renewable Energy Laboratory, submitted for publication 2013). These recommendations can help to ensure that a system aligns more closely with the design and the occupants' comfort expectations. Specifically, the recommendations described herein show how to configure a rectangular box with four outlets, a triangular box with three outlets, metal wyes with two outlets, and multiple configurations for more than four outlets. Designers of HVAC systems, contractors who are fabricating junction boxes on site, and anyone using the ACCA Manual D process for sizing duct runs will find this measure guideline invaluable for more accurately minimizing pressure losses when using junction boxes with flexible ducts.

  17. Ducts in the Attic? What Were They Thinking? Preprint

    SciTech Connect (OSTI)

    Roberts, D.; Winkler, J.

    2010-08-01

    As energy-efficiency efforts focus increasingly on existing homes, we scratch our heads about construction decisions made 30, 40, 50-years ago and ask: 'What were they thinking?' A logical follow-on question is: 'What will folks think in 2050 about the homes we're building today?' This question can lead to a lively discussion, but the current practice that we find most alarming is placing ducts in the attic. In this paper, we explore through literature and analysis the impact duct location has on cooling load, peak demand, and energy cost in hot climates. For a typical new home in these climates, we estimate that locating ducts in attics rather than inside conditioned space increases the cooling load 0.5 to 1 ton, increases cooling costs 15% and increases demand by 0.75 kW. The aggregate demand to service duct loss in homes built in Houston, Las Vegas, and Phoenix during the period 2000 through 2009 is estimated to be 700 MW. We present options for building homes with ducts in conditioned space and demonstrate that these options compare favorably with other common approaches to achieving electricity peak demand and consumption savings in homes.

  18. Sealing apparatus for airfoils of gas turbine engines

    DOE Patents [OSTI]

    Jones, R.B.

    1998-05-19

    An improved airfoil tip sealing apparatus is disclosed wherein brush seals are attached to airfoil tips with the distal ends of the brush seal fibers sealingly contacting opposing wall surfaces. Embodiments for variable vanes, stators and both cooled and uncooled turbine blade applications are disclosed. 17 figs.

  19. Sealing apparatus for airfoils of gas turbine engines

    DOE Patents [OSTI]

    Jones, Russell B. (San Diego, CA)

    1998-01-01

    An improved airfoil tip sealing apparatus is disclosed wherein brush seals are attached to airfoil tips with the distal ends of the brush seal fibers sealingly contacting opposing wall surfaces. Embodiments for variable vanes, stators and both cooled and uncooled turbine blade applications are disclosed.

  20. Seal strength models for medical device trays 

    E-Print Network [OSTI]

    Mays, Patricia Faye

    2009-05-15

    Seven empirical equations were developed for the prediction of seal strength for medical device trays. A new methodology was developed and used for identifying burst and peel locations and comparing burst pressure and peel ...

  1. Mechanical seal having a double-tier mating ring

    DOE Patents [OSTI]

    Khonsari, Michael M.; Somanchi, Anoop K.

    2005-09-13

    An apparatus and method to enhance the overall performance of mechanical seals in one of the following ways: by reducing seal face wear, by reducing the contact surface temperature, or by increasing the life span of mechanical seals. The apparatus is a mechanical seal (e.g., single mechanical seals, double mechanical seals, tandem mechanical seals, bellows, pusher mechanical seals, and all types of rotating and reciprocating machines) comprising a rotating ring and a double-tier mating ring. In a preferred embodiment, the double-tier mating ring comprises a first and a second stationary ring that together form an agitation-inducing, guided flow channel to allow for the removal of heat generated at the seal face of the mating ring by channeling a coolant entering the mating ring to a position adjacent to and in close proximity with the interior surface area of the seal face of the mating ring.

  2. Emergency sacrificial sealing method in filters, equipment, or systems

    DOE Patents [OSTI]

    Brown, Erik P

    2014-09-30

    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.

  3. Arrays of Sealed Silicon Nanotubes As Anodes for Lithium Ion Batteries

    E-Print Network [OSTI]

    Rogers, John A.

    , anisotropic expansion A dvanced energy storage technologies are critically important for the operationArrays of Sealed Silicon Nanotubes As Anodes for Lithium Ion Batteries Taeseup Song, Jianliang Xia ABSTRACT Silicon is a promising candidate for electrodes in lithium ion batteries due to its large

  4. Building America Technology Solutions for New and Existing Homes...

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

    and Impacts for 1 12-Story Homes More Documents & Publications Building America Technology Solutions for New and Existing Homes: Cost Analysis of Roof-Only Air Sealing...

  5. Building America Technology Solutions for New and Existing Homes...

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

    Apartment Compartmentalization with an Aerosol-Based Sealing Process Building America Technology Solutions for New and Existing Homes: Apartment Compartmentalization with an...

  6. Particle deposition from turbulent flow: Review of published research and its applicability to ventilation ducts in commercial buildings

    E-Print Network [OSTI]

    Sippola, Mark R.; Nazaroff, William W.

    2002-01-01

    a 90° bend in a 15-cm square duct at a velocity of 5 m/s.M. and Wang, D. (1999) Duct systems in large commercialin ventilation air supply ducts. Proceedings of Indoor Air ‘

  7. Porokeratotic eccrine ostial and dermal duct nevus treated with a combination erbium/CO laser: A case and brief review

    E-Print Network [OSTI]

    Wong, Jillian W; Summers, Erika M; Taylor, Mark B; Harris, Ronald M

    2011-01-01

    of the palm — a sweat duct naevus? Br J Dermatol 1979; 101:eccrine ostial and dermal duct naevus. Br J Dermatol 1980;eccrine ostial and dermal duct nevus. Pediatric Dermatology

  8. Duct Leakage Modeling in EnergyPlus and Analysis of Energy Savings from Implementing SAV with InCITeTM

    E-Print Network [OSTI]

    Wray, Craig

    2010-01-01

    C. 2005. “Detecting Critical Supply Duct Pressure”. ASHRAEnl18/nl_18.html Wray, C.P. 2003. “Duct Thermal Performance12  Figure 10.  Duct Layout for Intervention Floor (control 

  9. Effects of a new cystic fibrosis transmembrane conductance regulator inhibitor on Cl- conductance in human sweat ducts

    E-Print Network [OSTI]

    Wang, X F; Reddy, M M; Quinton, Paul M

    2004-01-01

    conductance in human sweat ducts X. F. Wang 1 , M. M. Reddyand cystic ?brosis sweat ducts. P?ugers Arch 408, 505–510.secretion in the human sweat duct. Ann N Y Acad Sci 574,

  10. Technolog

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

    focuses on multi-scale, multiphysics approaches to understanding natural systems, "engineering the earth" with sensing and drilling technologies and characterizing geomaterials...

  11. DEVELOPMENT OF A CERAMIC TAMPER INDICATING SEAL: SRNL CONTRIBUTIONS

    SciTech Connect (OSTI)

    Krementz, D.; Brinkman, K.; Martinez-Rodriguez, M.; Mendez-Torres, A.; Weeks, G.

    2013-06-03

    Savannah River National Laboratory (SRNL) and Sandia National Laboratories (SNL) are collaborating on development of a Ceramic Seal, also sometimes designated the Intrinsically Tamper Indicating Ceramic Seal (ITICS), which is a tamper indicating seal for international safeguards applications. The Ceramic Seal is designed to be a replacement for metal loop seals that are currently used by the IAEA and other safeguards organizations. The Ceramic Seal has numerous features that enhance the security of the seal, including a frangible ceramic body, protective and tamper indicating coatings, an intrinsic unique identifier using Laser Surface Authentication, electronics incorporated into the seal that provide cryptographic seal authentication, and user-friendly seal wire capture. A second generation prototype of the seal is currently under development whose seal body is of Low Temperature Co-fired Ceramic (LTCC) construction. SRNL has developed the mechanical design of the seal in an iterative process incorporating comments from the SNL vulnerability review team. SRNL is developing fluorescent tamper indicating coatings, with recent development focusing on optimizing the durability of the coatings and working with a vendor to develop a method to apply coatings on a 3-D surface. SRNL performed a study on the effects of radiation on the electronics of the seal and possible radiation shielding techniques to minimize the effects. SRNL is also investigating implementation of Laser Surface Authentication (LSA) as a means of unique identification of each seal and the effects of the surface coatings on the LSA signature.

  12. Advanced Strategy Guideline: Air Distribution Basics and Duct Design

    SciTech Connect (OSTI)

    Burdick, A.

    2011-12-01

    This report discusses considerations for designing an air distribution system for an energy efficient house that requires less air volume to condition the space. Considering the HVAC system early in the design process will allow adequate space for equipment and ductwork and can result in cost savings. Principles discussed that will maximize occupant comfort include delivery of the proper amount of conditioned air for appropriate temperature mixing and uniformity without drafts, minimization of system noise, the impacts of pressure loss, efficient return air duct design, and supply air outlet placement, as well as duct layout, materials, and sizing.

  13. Electrothermal controlled-exposure technology

    E-Print Network [OSTI]

    Maloney, John Mapes

    2006-01-01

    A technology is presented for exposing the contents of microfabricated cavities in a substrate. These contents are hermetically sealed until exposure is triggered by an electronic signal. The exposure mechanism uses ...

  14. Gas-lubricated seal for sealing between a piston and a cylinder wall

    DOE Patents [OSTI]

    Hoult, D.P.

    1985-09-10

    A piston-cylinder seal uses gas for a lubricant and has a runner supported on a gapless structure and placed in the space between the piston and the cylinder wall. The runner is deformed elastically under the influence of the operating pressures to follow and compensate for variations in the piston-cylinder fit and maintain a seal. 4 figs.

  15. Gas-lubricated seal for sealing between a piston and a cylinder wall

    DOE Patents [OSTI]

    Hoult, David P. (Box 89, Wellesley, MA 02181)

    1985-01-01

    A piston-cylinder seal uses gas for a lubricant and has a runner supported on a gapless structure and placed in the space between the piston and the cylinder wall. The runner is deformed elastically under the influence of the operating pressures to follow and compensate for variations in the piston-cylinder fit and maintain a seal.

  16. Particle Concentration Dynamics in the Ventilation Duct after an Artificial Release: for Countering Potential Bioterriorist Attack

    E-Print Network [OSTI]

    You , Siming; Wan, Man Pun

    2014-01-01

    leads to In this work, the models of particle concentration dynamics in the ventilation duct following a resuspension

  17. Development of a Whole Container Seal

    SciTech Connect (OSTI)

    Kuhn, Michael J; Pickett, Chris A; Stinson, Brad J; Rowe, Nathan C

    2014-01-01

    This paper outlines a technique for utilizing electrically conductive textiles as a whole container seal. This method has the potential to provide more robustness for ensuring that the container has not been breached versus conventional sealing methods that only provide tamper indication at the area used for normal access. The conductive textile is used as a distributed sensor for detecting and localizing container tamper or breach. For sealing purposes, the conductive fabric represents a bounded, near-infinite grid of resistors. The well-known infinite resistance grid problem was used to model and confirm the expected accuracy and validity of this approach. An experimental setup was built that uses a multiplexed Wheatstone bridge measurement to determine the resistances of a coarse electrode grid across the conductive fabric. Non-uniform resistance values of the grid infer the presence of damage or tears in the fabric. Results suggest accuracy proportional to the electrode spacing in determining the presence and location of disturbances in conductive fabric samples. Current work is focused on constructing experimental prototypes for field and environmental testing to gauge the performance of these whole container seals in real world conditions. We are also developing software and hardware to interface with the whole container seals. The latest prototypes are expected to provide more accuracy in detecting and localizing events, although detection of a penetration should be adequate for most sealing applications. We are also developing smart sensing nodes that integrate digital hardware and additional sensors (e.g., motion, humidity) into the electrode nodes within the whole container seal.

  18. Mechanical seal having a single-piece, perforated mating ring

    DOE Patents [OSTI]

    Khonsari, Michael M. (Baton Rouge, LA); Somanchi, Anoop K. (Fremont, CA)

    2007-08-07

    A mechanical seal (e.g., single mechanical seals, double mechanical seals, tandem mechanical seals, bellows, pusher mechanical seals, and all types of rotating and reciprocating machines) with reduced contact surface temperature, reduced contact surface wear, or increased life span. The mechanical seal comprises a rotating ring and a single-piece, perforated mating ring, which improves heat transfer by controllably channeling coolant flow through the single-piece mating ring such that the coolant is in substantially uniform thermal contact with a substantial portion of the interior surface area of the seal face, while maintaining the structural integrity of the mechanical seal and minimizing the potential for coolant flow interruptions to the seal face caused by debris or contaminants (e.g., small solids and trash) in the coolant.

  19. Solid oxide fuel cell having a glass composite seal

    DOE Patents [OSTI]

    De Rose, Anthony J.; Mukerjee, Subhasish; Haltiner, Jr., Karl Jacob

    2013-04-16

    A solid oxide fuel cell stack having a plurality of cassettes and a glass composite seal disposed between the sealing surfaces of adjacent cassettes, thereby joining the cassettes and providing a hermetic seal therebetween. The glass composite seal includes an alkaline earth aluminosilicate (AEAS) glass disposed about a viscous glass such that the AEAS glass retains the viscous glass in a predetermined position between the first and second sealing surfaces. The AEAS glass provides geometric stability to the glass composite seal to maintain the proper distance between the adjacent cassettes while the viscous glass provides for a compliant and self-healing seal. The glass composite seal may include fibers, powders, and/or beads of zirconium oxide, aluminum oxide, yttria-stabilized zirconia (YSZ), or mixtures thereof, to enhance the desirable properties of the glass composite seal.

  20. Statistical maritime radar duct estimation using hybrid genetic algorithmMarkov

    E-Print Network [OSTI]

    Gerstoft, Peter

    Statistical maritime radar duct estimation using hybrid genetic algorithm­Markov chain Monte Carlo encountered in low- altitude maritime radar applications. This is done by statistically estimating the duct of unknowns. Citation: Yardim, C., P. Gerstoft, and W. S. Hodgkiss (2007), Statistical maritime radar duct

  1. Modal Scattering at an Impedance Transition in a Lined Flow Duct

    E-Print Network [OSTI]

    Eindhoven, Technische Universiteit

    Modal Scattering at an Impedance Transition in a Lined Flow Duct Sjoerd W. Rienstra Eindhoven CB3 0WA, UK. An explicit Wiener-Hopf solution is derived to describe the scattering of duct modes at a hard-soft wall impedance transition in a circular duct with uniform mean flow. Specifically, we have

  2. Seamless Handover in Buildings Using HVAC Ducts: A New System Architecture

    E-Print Network [OSTI]

    Stancil, Daniel D.

    Seamless Handover in Buildings Using HVAC Ducts: A New System Architecture Ariton E. Xhafa, Paisarn ducts for wireless communications. The proposed solution is based on a new system architecture design of the indoor wireless networks that use the heating, ventilation, and air conditioning (HVAC) ducts

  3. On the solution to the Riemann problem for the compressible duct ow

    E-Print Network [OSTI]

    On the solution to the Riemann problem for the compressible duct ow Nikolai Andrianov and Gerald Warnecke #3; March 6, 2003 Abstract The quasi-one-dimensional Euler equations in a duct of variable cross of the Euler equations in a duct of corresponding geometry and compare it with the 1D results. Then

  4. ORNL/LTR-2014/283 A Comparison of Simulation Capabilities for Ducts

    E-Print Network [OSTI]

    Wang, Xiaorui "Ray"

    ORNL/LTR-2014/283 A Comparison of Simulation Capabilities for Ducts William A. Miller Som Shrestha and Transportation Sciences Division A Comparison of Simulation Capabilities for Ducts William A. Miller Som Shrestha...........................................................9 3 DUCTS PLACED IN UNCONDITIONED ZONES

  5. TEMPERATURE CONTROLLABILITY IN CROSS-FLOW HEAT EXCHANGERS AND LONG DUCTS

    E-Print Network [OSTI]

    Sen, Mihir

    TEMPERATURE CONTROLLABILITY IN CROSS-FLOW HEAT EXCHANGERS AND LONG DUCTS A Dissertation Submitted-FLOW HEAT EXCHANGERS AND LONG DUCTS Abstract by Sorour Abdulhadi Alotaibi The performance of thermal control and long ducts, are investigated, and the following issues are addressed. (a) The first is controllability

  6. Static Pressure Losses in 6, 8, and 10-inch Non-Metallic Flexible Ducts 

    E-Print Network [OSTI]

    Weaver, K.; Culp, C.

    2006-01-01

    This study measured airflow static pressure losses through non-metallic flexible ducts in compliance with ASHRAE Standard 120-1999, Methods of Testing to Determine Flow Resistance of HVAC Air Ducts and Fittings (ASHRAE 1999). Duct sizes of 6, 8...

  7. Experimental Demonstration of 2x2 MIMO Communications in a Reverberant Ventilation Duct

    E-Print Network [OSTI]

    Stancil, Daniel D.

    Experimental Demonstration of 2x2 MIMO Communications in a Reverberant Ventilation Duct Environment- tilation duct. We further demonstrate that MIMO coefficients applied to transmit and receive antennas can that ventilation ducts are an attractive media for distributing RF communication signals indoors (See for example

  8. Theoretical Study and Numerical Validation of Sound Radiation from Coaxial Annular Duct

    E-Print Network [OSTI]

    Huang, Xun

    Theoretical Study and Numerical Validation of Sound Radiation from Coaxial Annular Duct Xin Liu-infinite annular duct. Our problem is different from previous works in that both its inner pipe and outer pipe are semi-infinite. Hence, this problem is a better representative of aircraft engine bypass duct

  9. RF propagation in an HVAC duct system: impulse response characteristics of the channel

    E-Print Network [OSTI]

    Stancil, Daniel D.

    RF propagation in an HVAC duct system: impulse response characteristics of the channel Pavel V, the heating, ventilation, and air conditioning (HVAC) duct system in buildings is a complex network of hollow at RF and microwave frequencies of com- mon interest. HVAC ducts can be used as a wireless communication

  10. EXACT RIEMANN SOLUTIONS TO COMPRESSIBLE EULER EQUATIONS IN DUCTS WITH DISCONTINUOUS CROSSSECTION

    E-Print Network [OSTI]

    EXACT RIEMANN SOLUTIONS TO COMPRESSIBLE EULER EQUATIONS IN DUCTS WITH DISCONTINUOUS CROSS solutions for the system of Euler equa- tions in a duct with discontinuous varying cross through a duct of variable cross­section with the area a(x). They are given in the perturbation form U

  11. Characterization of the Conus bullatus genome and its venom-duct transcriptome

    E-Print Network [OSTI]

    Yandell, Mark

    Characterization of the Conus bullatus genome and its venom-duct transcriptome Hu et al. Hu et al ARTICLE Open Access Characterization of the Conus bullatus genome and its venom-duct transcriptome Hao Hu1 bullatus genome and venom-duct transcriptome. We find that conopeptides are highly expressed within

  12. Multi-carrier Signal Transmission through HVAC Ducts: Experimental Results for Channel Capacity

    E-Print Network [OSTI]

    Stancil, Daniel D.

    Multi-carrier Signal Transmission through HVAC Ducts: Experimental Results for Channel Capacity) ducts based on multi-carrier transmission technique and mea- sured channel frequency responses in the 2 through a building HVAC duct system demonstrate the ability to transmit with a spectral efficiency of 3

  13. AIAA 2008-2877 Sound Radiation from a Generic Bypass Duct with

    E-Print Network [OSTI]

    Huang, Xun

    1 AIAA 2008-2877 Sound Radiation from a Generic Bypass Duct with Bifurcations Xiaoxian Chen1 , Xun, United Kingdom The influence of bifurcations in an aero-engine bypass duct on noise radiation of the simulations were compared with those of a clean duct case. A circumferential mode of m=12 with radial mode

  14. Control of Flow Separation in S-ducts via Flow Injection and Suction

    E-Print Network [OSTI]

    Debiasi, Marco

    Control of Flow Separation in S-ducts via Flow Injection and Suction Marco Debiasi1 , Marco Robert as a mean to control the separation of flow in S-duct inlets. The overall goal is to reduce the distortion of the S-duct outlet flow and to improve its pressure recovery by using the least expenditure of energy. We

  15. Cut-on, cut-off transition of sound in slowly varying flow ducts

    E-Print Network [OSTI]

    Rienstra, Sjoerd W.

    Cut-on, cut-off transition of sound in slowly varying flow ducts Sjoerd W. Rienstra 19-walled duct with irrotational isentropic mean flow is studied. The usual turning point behaviour was found. 1 Introduction The exact multiple scale solution for sound propagation in a slowly varying lined flow duct

  16. LBNL# 40102 Field Investigation of Duct System Performance in California Light Commercial Buildings 1 of 26

    E-Print Network [OSTI]

    LBNL# 40102 Field Investigation of Duct System Performance in California Light Commercial Buildings 1 of 26 Field Investigation of Duct System Performance in California Light Commercial Buildings Wm National Laboratory Berkeley, California Synopsis This paper discusses field measurements of duct system

  17. SOUND TRANSMISSION IN SLOWLY VARYING CIRCULAR AND ANNULAR LINED DUCTS WITH FLOW a

    E-Print Network [OSTI]

    Eindhoven, Technische Universiteit

    SOUND TRANSMISSION IN SLOWLY VARYING CIRCULAR AND ANNULAR LINED DUCTS WITH FLOW a S.W. Rienstra/CEAS Aeroacoustics Conference, June 2­4, 1998, Toulouse ABSTRACT Sound transmission through straight circular ducts by a modal expansion. A natural ex­ tension for ducts with axially slowly varying properties (diameter

  18. Interior Duct Wall Pressure Downstream of a Low-Speed Scott C. Morris

    E-Print Network [OSTI]

    Alonso, Juan J.

    Interior Duct Wall Pressure Downstream of a Low-Speed Rotor Scott C. Morris , David B. Stephens The region downstream of a ducted rotor has been experimentally investigated in terms of its wake characteristics and the duct wall pressure fluctuations. The motivation for the measurements was to document

  19. Toward a Better Understanding of Ducted Rotor Antitorque and Directional Control in Forward Flight

    E-Print Network [OSTI]

    Toward a Better Understanding of Ducted Rotor Antitorque and Directional Control in Forward Flight of ducted rotors in low-power, near-edgewise flow conditions are not well understood. Motivated by phenomena was initiated to use CFD to improve the understanding of the dynamic relationship between ducted rotor thrust

  20. Performance Analysis of Dual-Fan, Dual-Duct Constant Volume Air-Handling Units 

    E-Print Network [OSTI]

    Joo, I. S.; Liu, M.

    2001-01-01

    Dual-fan, dual-duct air-handling units introduce outside air directly into the cooling duct and use two variable speed devices to independently maintain the static pressure of the hot and the cold air ducts. Analytical models have been developed...

  1. Cooling air recycling for gas turbine transition duct end frame and related method

    DOE Patents [OSTI]

    Cromer, Robert Harold (Johnstown, NY); Bechtel, William Theodore (Scotia, NY); Sutcu, Maz (Niskayuna, NY)

    2002-01-01

    A method of cooling a transition duct end frame in a gas turbine includes the steps of a) directing cooling air into the end frame from a region external of the transition duct and the impingement cooling sleeve; and b) redirecting the cooling air from the end frame into the annulus between the transition duct and the impingement cooling sleeve.

  2. 44 Market St - Refurbishment of a Dual Duct Building 

    E-Print Network [OSTI]

    Bannister, P.; Foo, G.

    2013-01-01

    44 Market St is a high profile, A-grade, 27-storey, 28,000m2 office building constructed in the 1970s. In common with many other buildings of its era, it was equipped with a dual duct air-conditioning system, and its highest NABERS Rating at full...

  3. Handover Performance of HVAC Duct Based Indoor Wireless Networks

    E-Print Network [OSTI]

    Stancil, Daniel D.

    in indoor wireless net- works (IWN) that use heating, ventilation, and air conditioning (HVAC) ducts point to serve one floor and its staircase region achieves the best handover performance for IWN]. An alternative approach to transmitt/receive the RF signal is to use heating, ventilation, and airconditioning

  4. Seal assembly with anti-rotation pin for high pressure supercritical fluids

    DOE Patents [OSTI]

    Wright, Steven A.; Fuller, Robert L.

    2014-08-05

    A seal assembly for sealing a machine with a first chamber and a second chamber is provided. A rotating shaft extends through the first and second chambers, and rotates therein. The seal assembly has a seal housing, a seal ring and a seal pin. The seal housing is positionable in the machine housing. The seal housing has a seal pocket extending into a fluid side thereof, and a housing receptacle extending into an inner diameter thereof at the seal pocket. The seal ring is positionable in the seal pocket of the seal housing for forming a seal therewith. The seal ring has a ring receptacle extending into an outer diameter thereof. The ring receptacle is positionable adjacent to the housing receptacle for defining a pin hole therebetween. The seal pin is loosely positionable in the pin hole whereby movement about the seal ring is accommodated while preventing rotation thereof.

  5. Experiments measuring particle deposition from fully developed turbulent flow in ventilation ducts

    SciTech Connect (OSTI)

    Sippola, Mark R.; Nazaroff, William W.

    2003-08-01

    Particle deposition in ventilation ducts influences particle exposures of building occupants and may lead to a variety of indoor air quality concerns. Experiments have been performed in a laboratory to study the effects of particle size and air speed on deposition rates of particles from turbulent air flows in galvanized steel and internally insulated ducts with hydraulic diameters of 15.2 cm. The duct systems were constructed of materials typically found in commercial heating, ventilating and air conditioning (HVAC) systems. In the steel duct system, experiments with nominal particle sizes of 1, 3, 5, 9 and 16 {micro}m were conducted at each of three nominal air speeds: 2.2, 5.3 and 9.0 m/s. In the insulated duct system, deposition rates of particles with nominal sizes of 1, 3, 5, 8 and 13 {micro}m were measured at nominal air speeds of 2.2, 5.3 and 8.8 m/s. Fluorescent techniques were used to directly measure the deposition velocities of monodisperse fluorescent particles to duct surfaces (floor, wall and ceiling) at two straight duct sections where the turbulent flow profile was fully developed. In steel ducts, deposition rates were higher to the duct floor than to the wall, which were, in turn, greater than to the ceiling. In insulated ducts, deposition was nearly the same to the duct floor, wall and ceiling for a given particle size and air speed. Deposition to duct walls and ceilings was greatly enhanced in insulated ducts compared to steel ducts. Deposition velocities to each of the three duct surface orientations in both systems were found to increase with increasing particle size or air velocity over the ranges studied. Deposition rates measured in the current experiments were in general agreement with the limited observations of similar systems by previous researchers.

  6. A Review of Thermal Acoustical and Special Project Requirements Data in Designing a Duct System 

    E-Print Network [OSTI]

    Lebens, A. F.

    1986-01-01

    or duct wrap because of their low resistance to punctures. As we all know, it would be impossible to clean out a lined sheet metal duct or fiberglass duct. Specifications on a remodel project should include flexibility for jobsite redesign without...). Lined sheet metal (1" 2.0 pcf density) had a U of .23; wrapped sheet metal (2" .75 pcf density) at 25 percent compression had a U of .16; fiberglass duct 1" thick was .19 U-value; and insulated flexible duct 1" thick had a .18 U-value. This data...

  7. Micromechanism linear actuator with capillary force sealing

    DOE Patents [OSTI]

    Sniegowski, Jeffry J. (Albuquerque, NM)

    1997-01-01

    A class of micromachine linear actuators whose function is based on gas driven pistons in which capillary forces are used to seal the gas behind the piston. The capillary forces also increase the amount of force transmitted from the gas pressure to the piston. In a major subclass of such devices, the gas bubble is produced by thermal vaporization of a working fluid. Because of their dependence on capillary forces for sealing, such devices are only practical on the sub-mm size scale, but in that regime they produce very large force times distance (total work) values.

  8. Technologies

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home RoomPreservationBio-Inspired Solar Fuel ProductionRecoverable15/2008Technologies Technologies

  9. Technology

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home RoomPreservationBio-Inspired Solar FuelTechnology /newsroom/_assets/images/s-icon.png Technology

  10. Dual-shank attachment design for omega seals

    DOE Patents [OSTI]

    Sattinger, Stanley S. (Pittsburgh, PA)

    1978-01-01

    An improved apparatus and process for attaching welded omega seal segments to reactor heads, standpipes, mechanisms, and plugs comprises a first shank in combination with a second shank to attach an omega seal at a metal-to-metal interface.

  11. S. AFRICA USES FIRE CRACKERS TO SCARE OFF SEALS

    E-Print Network [OSTI]

    AFRICA S. AFRICA USES FIRE CRACKERS TO SCARE OFF SEALS The South African purse -seine fisheries of ammunition per month tofishermen. Because of the great potential harm to the seal, South Africa's Division

  12. The effect of a new damper seal on rotordynamics 

    E-Print Network [OSTI]

    Li, Qiming

    1995-01-01

    An existing rotordynamic test apparatus is modified for a new type of gas damper seal. Experimental results including coastdowns, rap tests and leakage from the gas damper seal are presented along with comparison tests of a conventional labyrinth...

  13. Flow visualization and leakage measurements of worn labyrinth seals 

    E-Print Network [OSTI]

    Allen, Brian Frank

    1997-01-01

    A large-scale flow visualization test facility is used to conduct an experimental investigation into the leakage resistance and flow characteristics of worn labyrinth seals. Wear in labyrinth seals is a consequence of ...

  14. Leakage Prediction of Labyrinth Seals Having Advanced Cavity Shapes 

    E-Print Network [OSTI]

    Panicker, Sunil M.

    2011-02-22

    Labyrinth seals are widely used in various turbo machines including turbines, compressors and pumps. Their purpose is to prevent the backflow of the working fluid. This backflow is due to the leakage of the seal. This loss ...

  15. VOL. 28, NO. 8, AUGUST 1990 AIAA JOURNAL 1447 Flow Distortion in a Circular-to-Rectangular Transition Duct

    E-Print Network [OSTI]

    Leu, Tzong-Shyng "Jeremy"

    -to-Rectangular Transition Duct J. J. Miau,* T. S. Leu,? J. H. Chou,f S. A. Lint National Cheng Kung University, Tainan, Taiwan, Republic of China Experiments were made for three circular-to-rectangular transition ducts of the transition duct. The results indicate that the major driving force for flow in the duct to behave three

  16. Projecting the effects of environmental change on Antarctic seals

    E-Print Network [OSTI]

    Gatos, CA 95032, USA *sinif001@umn.edu Abstract: We consider how Antarctic seals may respond to changes

  17. Positive contact, self retaining bearing seals

    DOE Patents [OSTI]

    Johnson, Bruce H. (Kansas City, MO); Larsen, Lawrence E. (Kansas City, MO); Welch, Edmund F. (Kansas City, MO)

    1992-05-05

    An ultra-low friction bearing including an inner race, an outer race, bearing elements engaged between the inner and outer races and a seal between the inner and outer races is disclosed. The seal includes first and second sealing washers. The first washer has an outer diameter greater than an inner diameter of the outer race and an inner diameter greater than the outer diameter of the inner race. The second washer has an inner diameter less than the outer diameter of the inner race and an outer diameter less than the inner diameter of the outer race. The first washer slidably engages the outer race, the second washer slidably engages the inner race and the washers overlap and slidably engage one another. One of the washers snap fits into its respective inner or outer race while the other washer engages a stepped surface of the other of the inner and outer races. The grooved and stepped surface are offset from one another in a longitudinal direction of the races such that the washers are conically loaded thus providing a seal between the inner and outer races sufficient to prevent lubricant and contaminating particles from passing therethrough. The washers are made from a non-metallic semi-flexible low-modulus material.

  18. Measure Guideline: Guide to Attic Air Sealing

    SciTech Connect (OSTI)

    Lstiburek, J.

    2014-09-01

    The Guide to Attic Air Sealing was completed in 2010 and although not in the standard Measure Guideline format, is intended to be a Measure Guideline on Attic Air Sealing. The guide was reviewed during two industry stakeholders meetings held on December 18th, 2009 and January 15th, 2010, and modified based on the comments received. Please do not make comments on the Building America format of this document. The purpose of the Guide to Attic Air Sealing is to provide information and recommendations for the preparation work necessary prior to adding attic insulation. Even though the purpose of this guide is to save energy - health, safety and durability should not be compromised by energy efficiency. Accordingly, combustion safety and ventilation for indoor air quality are addressed first. Durability and attic ventilation then follow. Finally, to maximize energy savings, air sealing is completed prior to insulating. The guide is intended for home remodelers, builders, insulation contractors, mechanical contractors, general contractors who have previously done remodeling and homeowners as a guide to the work that needs to be done.

  19. Evaluation of Tin Plating for Multi Canister Overpack Seals

    SciTech Connect (OSTI)

    GRAVES, C.E.

    2000-12-07

    The Multi-Canister Overpack (MCO) incorporates plated seals for use with (1) the port cover plates, (2) process valves of the shield plug, and (3) test plug ofthe cover cap. These seals are required to maintain leakage rates as low as 10{sup -7} scc/atm-sec. in the cover cap to test plug seal. The seals are manufactured by EG&G division of Perkin Elmer. Currently, the MCO design calls for use of silver or gold plated seals in these locations. The seal plating materials are deposited on Inconel 718 or X-750 substrates. Some of these seals are reused several times in service on the MCO. The MCO manufacturer has built several MCOs and is in the leak testing stage and has had great difficulty obtaining acceptable leakage rates at their plant in Camden, New Jersey. The seal manufacturer was called in to evaluate the situation and now the seal manufacturer recommends tin plated seals. This evaluation examines the Corrosion resistance and thermal stability of tin plating on the seals. The use of tin plating on MCO seals was evaluated for corrosion resistance and thermal stability. The corrosion resistance of tin in the expected MCO environments is acceptable. The effect of radiation hardening will offset creep deformation results. However, a low melting point indicates unsuitability at significantly elevated temperatures.

  20. Dynamic Cryogenic Seals to Support Fueling of Fusion Tokomaks

    E-Print Network [OSTI]

    Collins, Gary S.

    Dynamic Cryogenic Seals to Support Fueling of Fusion Tokomaks U. Naranjo and J. W. Leachman School ACKNOWLEDGEMENTS This work was supported by the National Science Foundation's REU program under grant number EEC seal and bolt, and running the experiment once more to ensure an adequate seal. In the future this test

  1. Angel wing seals for blades of a gas turbine and methods for determining angel wing seal profiles

    DOE Patents [OSTI]

    Wang, John Zhiqiang (Greenville, SC)

    2003-01-01

    A gas turbine has buckets rotatable about an axis, the buckets having angel wing seals. The seals have outer and inner surfaces, at least one of which, and preferably both, extend non-linearly between root radii and the tip of the seal body. The profiles are determined in a manner to minimize the weight of the seal bodies, while maintaining the stresses below predetermined maximum or allowable stresses.

  2. Technologies

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power AdministrationRobust,Field-effectWorking With U.S. CoalMexico IndependentMatter and Technologies R&D

  3. Skew And Twist Resistant Hydrodynamic Rotary Shaft Seal

    DOE Patents [OSTI]

    Dietle, Lannie (Sugar Land, TX); Kalsi, Manmohan Singh (Houston, TX)

    2000-03-14

    A hydrodynamically lubricated squeeze packing type rotary shaft seal suitable for lubricant retention and environmental exclusion which incorporates one or more resilient protuberances which and cooperate with the gland walls to hold the seal straight in its installation groove in unpressurized and low pressure lubricant retention applications thereby preventing skew-induced wear caused by impingement of abrasive contaminants present in the environment, and which also serve as radial bearings to prevent tipping of the seal within its installation gland. Compared to prior art, this invention provides a dramatic reduction of seal and shaft wear in abrasive environments and provides a significant increase in seal life.

  4. Method of assembling and sealing an alkali metal battery

    DOE Patents [OSTI]

    Elkins, P.E.; Bell, J.E.; Harlow, R.A.; Chase, G.G.

    1983-03-01

    A method of initially assembling and then subsequently hermetically sealing a container portion of an alkali metal battery to a ceramic portion of such a battery is disclosed. Sealing surfaces are formed respectively on a container portion and a ceramic portion of an alkali metal battery. These sealing surfaces are brought into juxtaposition and a material is interposed there between. This interposed material is one which will diffuse into sealing relationship with both the container portion and the ceramic portion of the alkali metal battery at operational temperatures of such a battery. A pressure is applied between these sealing surfaces to cause the interposed material to be brought into intimate physical contact with such juxtaposed surfaces. A temporary sealing material which will provide a seal against a flow of alkali metal battery reactants there through at room temperatures and is applied over the juxtaposed sealing surfaces and material interposed there between. The entire assembly is heated to an operational temperature so that the interposed material diffuses into the container portion and the ceramic portion to form a hermetic seal there between. The pressure applied to the juxtaposed sealing surfaces is maintained in order to ensure the continuation of the hermetic seal. 4 figs.

  5. Method of assembling and sealing an alkali metal battery

    DOE Patents [OSTI]

    Elkins, Perry E. (Santa Ana, CA); Bell, Jerry E. (Santa Ana, CA); Harlow, Richard A. (Newport Beach, CA); Chase, Gordon G. (San Diego, CA)

    1983-01-01

    A method of initially assembling and then subsequently hermetically sealing a container portion of an alkali metal battery to a ceramic portion of such a battery is disclosed. Sealing surfaces are formed respectively on a container portion and a ceramic portion of an alkali metal battery. These sealing surfaces are brought into juxtaposition and a material is interposed therebetween. This interposed material is one which will diffuse into sealing relationship with both the container portion and the ceramic portion of the alkali metal battery at operational temperatures of such a battery. A pressure is applied between these sealing surfaces to cause the interposed material to be brought into intimate physical contact with such juxtaposed surfaces. A temporary sealing material which will provide a seal against a flow of alkali metal battery reactants therethrough at room temperatures and is applied over the juxtaposed sealing surfaces and material interposed therebetween. The entire assembly is heated to an operational temperature so that the interposed material diffuses into the container portion and the ceramic portion to form a hermetic seal therebetween. The pressure applied to the juxtaposed sealing surfaces is maintained in order to ensure the continuation of the hermetic seal.

  6. Low torque hydrodynamic lip geometry for rotary seals

    DOE Patents [OSTI]

    Dietle, Lannie L.; Schroeder, John E.

    2015-07-21

    A hydrodynamically lubricating geometry for the generally circular dynamic sealing lip of rotary seals that are employed to partition a lubricant from an environment. The dynamic sealing lip is provided for establishing compressed sealing engagement with a relatively rotatable surface, and for wedging a film of lubricating fluid into the interface between the dynamic sealing lip and the relatively rotatable surface in response to relative rotation that may occur in the clockwise or the counter-clockwise direction. A wave form incorporating an elongated dimple provides the gradual convergence, efficient impingement angle, and gradual interfacial contact pressure rise that are conducive to efficient hydrodynamic wedging. Skewed elevated contact pressure zones produced by compression edge effects provide for controlled lubricant movement within the dynamic sealing interface between the seal and the relatively rotatable surface, producing enhanced lubrication and low running torque.

  7. Apparatus and method for inspecting a sealed container

    DOE Patents [OSTI]

    Harmon, J Frank [Pocatello, ID; Jones, James L [Idaho Falls, ID; Hunt, Alan W [Pocatello, ID; Spaulding, Randy J [Pocatello, ID; Smith, Michael [Phoenix, AZ

    2009-03-24

    An apparatus for inspecting a sealed container is disclosed and which includes a pulsed electron accelerator which is positioned in spaced relation relative to a first side of the sealed container, and which produces a pulsed beam of photons which passes through the sealed container and any contents enclosed within the sealed container; a detector positioned in spaced relation relative to a second, opposite side of the sealed container, and which receives the pulsed beam of photons which passes through the contents of the sealed container, and which produces an output signal; and a computer for developing a visible image from the output signal of the detector which depicts the contents of the sealed container.

  8. Method of making hermetic seals for hermetic terminal assemblies

    DOE Patents [OSTI]

    Hsu, John S.; Marlino, Laura D.; Ayers, Curtis W.

    2010-04-13

    This invention teaches methods of making a hermetic terminal assembly comprising the steps of: inserting temporary stops, shims and jigs on the bottom face of a terminal assembly thereby blocking assembly core open passageways; mounting the terminal assembly inside a vacuum chamber using a temporary assembly perimeter seal and flange or threaded assembly interfaces; mixing a seal admixture and hardener in a mixer conveyor to form a polymer seal material; conveying the polymer seal material into a polymer reservoir; feeding the polymer seal material from the reservoir through a polymer outlet valve and at least one polymer outlet tube into the terminal assembly core thereby filling interstitial spaces in the core adjacent to service conduits, temporary stop, and the terminal assembly casing; drying the polymer seal material at room temperature thereby hermetically sealing the core of the terminal assembly; removing the terminal assembly from the vacuum chamber, and; removing the temporary stops, shims.

  9. Numerical investigation of microbially induced calcite precipitation as leakage mitigation technology

    E-Print Network [OSTI]

    Cirpka, Olaf Arie

    storage in the subsurface or fracking could be reduced with sealing technologies like microbially induced Abandonnedwell Injectionwellvicinity Fracking CO2 Reservoir Figure 1: Potential application sites of MICP

  10. Manifold seal structure for fuel cell stack

    DOE Patents [OSTI]

    Collins, William P. (South Windsor, CT)

    1988-01-01

    The seal between the sides of a fuel cell stack and the gas manifolds is improved by adding a mechanical interlock between the adhesive sealing strip and the abutting surface of the manifolds. The adhesive is a material which can flow to some extent when under compression, and the mechanical interlock is formed providing small openings in the portion of the manifold which abuts the adhesive strip. When the manifolds are pressed against the adhesive strips, the latter will flow into and through the manifold openings to form buttons or ribs which mechanically interlock with the manifolds. These buttons or ribs increase the bond between the manifolds and adhesive, which previously relied solely on the adhesive nature of the adhesive.

  11. Spent Sealed Sources Management in Switzerland - 12011

    SciTech Connect (OSTI)

    Beer, H.F.

    2012-07-01

    Information is provided about the international recommendations for the safe management of disused and spent sealed radioactive sources wherein the return to the supplier or manufacturer is encouraged for large radioactive sources. The legal situation in Switzerland is described mentioning the demand of minimization of radioactive waste as well as the situation with respect to the interim storage facility at the Paul Scherrer Institute (PSI). Based on this information and on the market situation with a shortage of some medical radionuclides the management of spent sealed sources is provided. The sources are sorted according to their activity in relation to the nuclide-specific A2-value and either recycled as in the case of high active sources or conditioned as in the case for sources with lower activity. The results are presented as comparison between recycled and conditioned activity for three selected nuclides, i.e. Cs-137, Co-60 and Am-241. (author)

  12. PRESSURE ACTIVATED SEALANT TECHNOLOGY

    SciTech Connect (OSTI)

    Michael A. Romano

    2004-04-01

    The objective of this project is to develop new, efficient, cost effective methods of internally sealing natural gas pipeline leaks through the application of differential pressure activated sealants. In researching the current state of the art for gas pipeline sealing technologies we concluded that if the project was successful, it appeared that pressure activated sealant technology would provide a cost effective alternative to existing pipeline repair technology. From our analysis of current field data for a 13 year period from 1985 to 1997 we were able to identify 205 leaks that were candidates for pressure activated sealant technology, affirming that pressure activated sealant technology is a viable option to traditional external leak repairs. The data collected included types of defects, areas of defects, pipe sizes and materials, incident and operating pressures, ability of pipeline to be pigged and corrosion states. This data, and subsequent analysis, was utilized as a basis for constructing applicable sealant test modeling.

  13. Strain-tolerant ceramic coated seal

    DOE Patents [OSTI]

    Schienle, James L. (Phoenix, AZ); Strangman, Thomas E. (Phoenix, AZ)

    1994-01-01

    A metallic regenerator seal is provided having multi-layer coating comprising a NiCrAlY bond layer, a yttria stabilized zirconia (YSZ) intermediate layer, and a ceramic high temperature solid lubricant surface layer comprising zinc oxide, calcium fluoride, and tin oxide. An array of discontinuous grooves is laser machined into the outer surface of the solid lubricant surface layer making the coating strain tolerant.

  14. High expansion, lithium corrosion resistant sealing glasses

    DOE Patents [OSTI]

    Brow, R.K.; Watkins, R.D.

    1991-06-04

    Glass compositions containing CaO, Al[sub 2]O[sub 3], B[sub 2]O[sub 3], SrO and BaO in various combinations of mole % are provided. These compositions are capable of forming stable glass-to-metal seals with pin materials of 446 Stainless Steel and Alloy-52 rather than molybdenum, for use in harsh chemical environments, specifically in lithium batteries.

  15. High expansion, lithium corrosion resistant sealing glasses

    DOE Patents [OSTI]

    Brow, Richard K. (Albuquerque, NM); Watkins, Randall D. (Albuquerque, NM)

    1991-01-01

    Glass compositions containing CaO, Al.sub.2 O.sub.3, B.sub.2 O.sub.3, SrO and BaO in various combinations of mole % are provided. These compositions are capable of forming stable glass-to-metal seals with pin materials of 446 Stainless Steel and Alloy-52 rather than molybdenum, for use in harsh chemical environments, specifically in lithium batteries.

  16. Management of disused plutonium sealed sources

    SciTech Connect (OSTI)

    Whitworth, Julia Rose [Los Alamos National Laboratory; Pearson, Michael W [Los Alamos National Laboratory; Abeyta, Cristy [Los Alamos National Laboratory

    2010-01-01

    The Global Threat Reduction Initiative's (GTRI) Offsite Source Recovery Project (OSRP) has been recovering excess and unwanted radioactive sealed sources since 1999, including more than 2,400 Plutonium (Pu)-238 sealed sources and 653 Pu-239-bearing sources that represent more than 10% of the total sources recovered by GTRI/OSRP to date. These sources have been recovered from hundreds of sites within the United States (US) and around the world. OSRP grew out of early efforts at the Los Alamos National Laboratory (LANL) to recover and disposition excess Plutonium-239 (Pu-239) sealed sources that were distributed in the 1960s and 1970s under the Atoms for Peace Program, a loan-lease program that serviced 31 countries, as well as domestic users. In the conduct of these recovery operations, GTRI/OSRP has been required to solve problems related to knowledge-of-inventory, packaging and transportation of fissile and heat-source materials, transfer of ownership, storage of special nuclear material (SNM) both at US Department of Energy (DOE) facilities and commercially, and disposal. Unique issues associated with repatriation from foreign countries, including end user agreements required by some European countries and denials of shipment, will also be discussed.

  17. High-Performance Ducts in Hot-Dry Climates Hoeschele, Marc [National

    Office of Scientific and Technical Information (OSTI)

    Performance Ducts in Hot-Dry Climates Hoeschele, Marc National Renewable Energy Laboratory (NREL), Golden, CO (United States); Chitwood, Rick National Renewable Energy...

  18. DEVELOPING FLOW AND HEAT TRANSFER IN STRONGLY CURVED DUCTS OF RECTANGULAR CROSS-SECTION

    E-Print Network [OSTI]

    Yee, G.

    2010-01-01

    DEVELOpiNG FLOW AND HEAT TRANSFER IN STRONGLY CURVED DUCTS9092 Developing Flow and Heat Transfer in Strongly CurvedForced Convection Heat Transfer in Curved Rectangular

  19. Building America Technology Solutions Case Study: Sealed Crawled...

    Energy Savers [EERE]

    in Production Housing - Building America Top Innovation Building America Whole-House Solutions for New Homes: EcoVillage: A Net Zero Energy Ready Community, Ithaca, New York...

  20. Building America Technology Solutions Case Study: Sealed Crawled Spaces

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative FuelsofProgram:Y-12Power, IncBio CentersBreakingNew Media--AnEffectiveness andRoofwith

  1. Workplace Charging Challenge Partner: Freudenberg-NOK Sealing Technologies

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative FuelsofProgram: Report1538-1950DepartmentWaveWind ProgramWork PlanDIRECTVDepartment

  2. Impact of Ducting on Heat Pump Water Heater Space Conditioning Energy Use and Comfort

    SciTech Connect (OSTI)

    Widder, Sarah H.; Petersen, Joseph M.; Parker, Graham B.; Baechler, Michael C.

    2014-07-21

    Increasing penetration of heat pump water heaters (HPWHs) in the residential sector will offer an important opportunity for energy savings, with a theoretical energy savings of up to 63% per water heater and up to 11% of residential energy use (EIA 2009). However, significant barriers must be overcome before this technology will reach widespread adoption in the Pacific Northwest region and nationwide. One significant barrier noted by the Northwest Energy Efficiency Alliance (NEEA) is the possible interaction with the homes’ space conditioning system for units installed in conditioned spaces. Such complex interactions may decrease the magnitude of whole-house savings available from HPWH installed in the conditioned space in cold climates and could lead to comfort concerns (Larson et al. 2011; Kresta 2012). Modeling studies indicate that the installation location of HPWHs can significantly impact their performance and the resultant whole-house energy savings (Larson et al. 2012; Maguire et al. 2013). However, field data are not currently available to validate these results. This field evaluation of two GE GeoSpring HPWHs in the PNNL Lab Homes is designed to measure the performance and impact on the Lab Home HVAC system of a GE GeoSpring HPWH configured with exhaust ducting compared to an unducted GeoSpring HPWH during heating and cooling season periods; and measure the performance and impact on the Lab Home HVAC system of the GeoSpring HPWH with both supply and exhaust air ducting as compared to an unducted GeoSpring HPWH during heating and cooling season periods. Important metrics evaluated in these experiments include water heater energy use, HVAC energy use, whole house energy use, interior temperatures (as a proxy for thermal comfort), and cost impacts. This technical report presents results from the PNNL Lab Homes experiment.

  3. Model-Based Commissioning Methodology for Simple Duct System 

    E-Print Network [OSTI]

    Odajima, T.; Takashi, M.; Juckel-Murakami, B.

    2004-01-01

    and HEPA filter. For the system the VAV is used as constant air volume control device. Controlled room pressure generates airflow from Room B to A and B to C (i.e., pressure in Room B is (+ +), pressure in Room A is (+) and pressure in Room C... shown in Figure 7. As the room leakage is not a subject of this paper, it is not amplified. Figure 3. Air volume pattern for the positive pressure (++) room The duct leakage is calculated from AHU to diffuser (HEPA filter) as shown...

  4. Duct Remediation Program: Material characterization and removal/handling

    SciTech Connect (OSTI)

    Beckman, T.d.; Davis, M.M.; Karas, T.M.

    1992-11-01

    Remediation efforts were successfully performed at Rocky Flats to locate, characterize, and remove plutonium holdup from process exhaust ducts. Non-Destructive Assay (NDA) techniques were used to determine holdup locations and quantities. Visual characterization using video probes helped determine the physical properties of the material, which were used for remediation planning. Assorted equipment types, such as vacuum systems, scoops, brushes, and a rotating removal system, were developed to remove specific material types. Personnel safety and material handling requirements were addressed throughout the project.

  5. Duct Leakage Repeatability Testing (Technical Report) | SciTech Connect

    Office of Scientific and Technical Information (OSTI)

    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 Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefield Municipal GasAdministration Medal01TechnicalScientific andScientificDOE Data ID Service DOEandDuct

  6. Duct Chase Sprinkler Replacement Project (4594), 5/31/2012

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration would like submit theCovalentLaboratory |Sectorfor $1.14 Per GallonDataEnergyDuct Chase

  7. Pressure actuated film riding seals for turbo machinery

    DOE Patents [OSTI]

    Bidkar, Rahul Anil; Thatte, Azam Mihir; Gibson, Nathan Evan McCurdy; Giametta, Andrew Paul

    2015-08-25

    A seal assembly for a rotary machine is provided. The seal assembly includes multiple sealing device segments disposed circumferentially intermediate to a stationary housing and a rotor. Each of the sealing device segments includes a stator interface element, a shoe plate having an extended portion having one or more labyrinth teeth facing the rotor and a load bearing portion, wherein the shoe plate is configured to generate an aerodynamic force between the shoe plate and the rotor. The sealing device segment further includes a secondary seal configured to be in contact with the stator interface element at a radially outer end and configured to be in contact with an elevated nose section of the extended portion of the shoe plate on a radially inner end; and multiple flexible elements attached to the shoe plate and to the stator interface element.

  8. Evaluation of the Repeatability of the Delta Q Duct Leakage Testing Technique Including Investigation of Robust Analysis Techniques and Estimates of Weather Induced Uncertainty

    E-Print Network [OSTI]

    Dickerhoff, Darryl

    2008-01-01

    Deve lop m ent of a New Duct Leakage Test: Delta Q.    than a few cfm for tight duct systems as long as at leastHowever houses with leakier duct systems seem to have less

  9. Skew and twist resistant hydrodynamic rotary shaft seal

    DOE Patents [OSTI]

    Dietle, Lannie (Sugar Land, TX); Kalsi, Manmohan Singh (Houston, TX)

    1999-01-01

    A hydrodynamically lubricated squeeze packing type rotary shaft seal suitable for lubricant retention and environmental exclusion which incorporates one or more resilient protuberances which and cooperate with the gland walls to hold the seal straight in its installation groove in unpressurized and low pressure lubricant retention applications thereby preventing skew-induced wear caused by impingement of abrasive contaminants present in the environment, and which also serve as radial bearings to prevent tipping of the seal within its installation gland.

  10. Integral edge seals for phosphoric acid fuel cells

    DOE Patents [OSTI]

    Granata, Jr., Samuel J. (South Greensburg, PA); Woodle, Boyd M. (North Huntingdon Township, Westmoreland County, PA); Dunyak, Thomas J. (Blacksburg, VA)

    1992-01-01

    A phosphoric acid fuel cell having integral edge seals formed by an elastomer permeating an outer peripheral band contiguous with the outer peripheral edges of the cathode and anode assemblies and the matrix to form an integral edge seal which is reliable, easy to manufacture and has creep characteristics similar to the anode, cathode and matrix assemblies inboard of the seals to assure good electrical contact throughout the life of the fuel cell.

  11. Skew and twist resistant hydrodynamic rotary shaft seal

    DOE Patents [OSTI]

    Dietle, L.; Kalsi, M.S.

    1999-02-23

    A hydrodynamically lubricated squeeze packing type rotary shaft seal suitable for lubricant retention and environmental exclusion which incorporates one or more resilient protuberances which cooperate with the gland walls to hold the seal straight in its installation groove in unpressurized and low pressure lubricant retention applications thereby preventing skew-induced wear caused by impingement of abrasive contaminants present in the environment, and which also serve as radial bearings to prevent tipping of the seal within its installation gland. 14 figs.

  12. A Zero Emission Mechanical Seal with Integral Micro Heat Exchanger 

    E-Print Network [OSTI]

    Khonsari, M.

    2005-01-01

    Emission Seal with Improved Heat Transfer Characteristics Michael Khonsari Dow Chemical Endowed Chair in Rotating Machinery and Professor Center for Rotating Machinery Department of Mechanical Engineering Louisiana State University Baton Rouge, LA... 70803 Khonsari@me.lsu.edu Mechanical seals are susceptible to premature failure due to intense heat generation at the interface between the rotating and stationary seal faces. Heat checking, blistering, and hot spotting are all manifestations...

  13. A Field Study Comparison of the Energy and Moisture Performance Characteristics of Ventilated Versus Sealed Crawl Spaces in the South

    SciTech Connect (OSTI)

    Bruce Davis; Cyrus Dastur; William E. Warren; Shawn Fitzpatrick; Christine Maurer; Rob Stevens; Terry Brennan; William Rose

    2005-06-22

    This study compared the performance of closed crawl spaces, which had sealed foundation wall vents, a sealed polyethylene film liner and various insulation and drying strategies, to traditional wall-vented crawl spaces with perimeter wall vents and polyethylene film covering 100% of the ground surface. The study was conducted at 12 owner-occupied, all electric, single-family detached houses with the same floor plan located on one cul-de-sac in the southeastern United States. Using the matched pairs approach, the houses were divided into three study groups of four houses each. Comparative data was recorded for each house to evaluate sub-metered heat pump energy consumption, relative humidity, wood moisture content, duct infiltration, house infiltration, temperature, radon, and bioaerosol levels. Findings indicated that in the humid conditions of the southeastern United States, a properly closed crawl space is a robust construction measure that produces a substantially drier crawl space and significantly reduces occupied space conditioning energy use on an annual basis.

  14. Phase Stability of an HT-9 Duct Irradiated in FFTF

    SciTech Connect (OSTI)

    O. Anderoglu; J. Van den Bosch; B. H. Sencer; E. Stergar; D. Bhattacharya; P. Dickerson; M. Hartl; S.A. Maloy; P. Hosemann

    2012-11-01

    A fuel test assembly known as ACO-3 duct made out of a fully tempered ferritic/martensitic steel (HT-9) was previously irradiated in the Fast Flux Test Reactor Facility (FFTF) up to 155 dpa at a temperature range of 380-504°C. The microstructures of the samples from 5 different zones along the face of the duct were analyzed using a combination of TEM based techniques, SANS and APT. A high density of Cr rich a' precipitates together with moderate density G-phase precipitates with an average sizes of 5 and 11 nm respectively were found at 20 dpa, 380°C zone. It was found that the precipitations of the second phases are more sensitive to temperature then the dose. In general, the density of both precipitates decreases with increasing irradiation temperature. No significant change is observed in average size of a' while the average size of G-phase precipitates increases up to 27 nm at 440°C. Voids are seen at 100 (410°C) and 155 (440°C) dpa zones but none was detected at 96 dpa (466°C) zone. In contrast to what is reported in the literature, no laves or Chi phases were found in any of the zones.

  15. Reflection and Ducting of Gravity Waves Inside the Sun

    E-Print Network [OSTI]

    MacGregor, K B

    2011-01-01

    Internal gravity waves excited by overshoot at the bottom of the convection zone can be influenced by rotation and by the strong toroidal magnetic field that is likely to be present in the solar tachocline. Using a simple Cartesian model, we show how waves with a vertical component of propagation can be reflected when traveling through a layer containing a horizontal magnetic field with a strength that varies with depth. This interaction can prevent a portion of the downward-traveling wave energy flux from reaching the deep solar interior. If a highly reflecting magnetized layer is located some distance below the convection zone base, a duct or wave guide can be set up, wherein vertical propagation is restricted by successive reflections at the upper and lower boundaries. The presence of both upward- and downward-traveling disturbances inside the duct leads to the existence of a set of horizontally propagating modes that have significantly enhanced amplitudes. We point out that the helical structure of these ...

  16. ENERY ORNL/Sub/80-61613/1 Hermetic Bellows Seal for

    E-Print Network [OSTI]

    Oak Ridge National Laboratory

    Information Service U.S. Department of Commerce 5285 Port Royal Road, Springfield, Virginia 22161 NTIS price-Seal and Three-Seal Arrangements; 80 psi Pressure Differential' Across Seal Wall 26 82311 #12;vi LIST OF TABLES Table Page 1 Linear Seals Procured for the Project 4 2 Analysis/Test Cases--Single Seal 10 3 Maximum

  17. HEAVY METALS IN THE NORTHERN FUR SEAL, CALLORHINUS URSIN US, AND

    E-Print Network [OSTI]

    HEAVY METALS IN THE NORTHERN FUR SEAL, CALLORHINUS URSIN US, AND HARBOR SEAL, PHOCA VITULINA Calillnnia harbor seal and 170 ppm in a fur seal taken oil the Washington coast. Concentrations of cadmium of mercury were from southern California seals. Heavy metals are persistent contaminants that ultimately end

  18. Sealed One Piece Battery Having A Prism Shape Container

    DOE Patents [OSTI]

    Verhoog, Roelof (Bordeaux, FR); Barbotin, Jean-Loup (Pompignac, FR)

    2000-03-28

    A sealed one-piece battery having a prism-shaped container including: a tank consisting of a single plastic material, a member fixed and sealed to the tank and to partitions on the side of the tank opposite the transverse wall to seal the tank, two flanges fixed and sealed to longitudinal walls defining flow compartments for a heat-conducting fluid, and two tubes on the transverse wall of the tank forming an inlet and an outlet for fluid common to the compartments.

  19. Savings Project: Insulate and Air Seal Floors Over Unconditioned...

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

    Project: Insulate and Air Seal Floors Over Unconditioned Garages Tips: Passive Solar Heating and Cooling Where to insulate. Adding insulation in the areas shown here may be...

  20. Management of Disused Radioactive Sealed Sources in Egypt - 13512

    SciTech Connect (OSTI)

    Mohamed, Y.T.; Hasan, M.A.; Lasheen, Y.F.

    2013-07-01

    The future safe development of nuclear energy and progressive increasing use of sealed sources in medicine, research, industry and other fields in Egypt depends on the safe and secure management of disused radioactive sealed sources. In the past years have determined the necessity to formulate and apply the integrated management program for radioactive sealed sources to assure harmless and ecological rational management of disused sealed sources in Egypt. The waste management system in Egypt comprises operational and regulatory capabilities. Both of these activities are performed under legislations. The Hot Laboratories and Waste Management Center HLWMC, is considered as a centralized radioactive waste management facility in Egypt by law 7/2010. (authors)

  1. Non-Newtonian Bile Flow in Elastic Cystic Duct: One-and Three-Dimensional Modeling

    E-Print Network [OSTI]

    Luo, Xiaoyu

    - tion) and in gallbladder pain. In this paper, we extend our previous study of the human biliary system2 Sudden expansion head-loss coefficient c4 Head-loss coefficient for a 90° bend d Internal diameter of duct, mm E Young's modulus of cystic duct wall, Pa f Darcy friction factor f0 Darcy friction factor

  2. Ducted Turbine Blade Optimization Using Numerical Simulation Michael Shives and Curran Crawford

    E-Print Network [OSTI]

    Pedersen, Tom

    Ducted Turbine Blade Optimization Using Numerical Simulation Michael Shives and Curran Crawford analysis and optimization of ducted turbines. The model is similar to standard blade element momentum. This eliminates many assumptions used in applying the typical blade element momentum (BEM) theory to a turbine

  3. Static Pressure Loss in 12”, 14”, and 16” Non-metallic Flexible Duct 

    E-Print Network [OSTI]

    Cantrill, David Lee

    2013-08-01

    This study was conducted to determine the effects of compression on pressure drops in non-metallic flexible duct. Duct sizes of 12”, 14” and 16” diameters were tested at a five different compression ratios (maximum stretch, 4%, 15%, 30% and 45...

  4. Contrasting the efficiency of radiation belt losses caused by ducted and nonducted whistlermode waves

    E-Print Network [OSTI]

    Cummer, Steven A.

    Contrasting the efficiency of radiation belt losses caused by ducted and nonducted whistlermode, nonducted VLF waves are much less effective in driving radiation belt pitch angle scattering. Citation. Parrot, and J.J. Berthelier (2010), Contrasting the efficiency of radiation belt losses caused by ducted

  5. Sealed Radioactive Source Accountability and Control Guide

    Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

    1999-04-15

    For use with Title 10, Code of Federal Regulations, Part 835, Occupational Radiation Protection. This Guide provides an acceptable methodology for establishing and operating a sealed radioactive source accountability and control program that will comply with U.S. Department of Energy (DOE) requirements specified in Title 10 of the Code of Federal Regulations (CFR), Part 835, Occupational Radiation Protection (DOE 1998a), hereinafter referred to as 10 CFR 835. In particular, this Guide provides guidance for achieving compliance with subpart M of 10 CFR 835. Canceled by DOE G 441.1-1B.

  6. Measure Guideline: Guide to Attic Air Sealing

    SciTech Connect (OSTI)

    Lstiburek, Joseph

    2014-09-01

    The purpose of this measure guideline is to provide information and recommendations for the preparation work necessary prior to adding attic insulation. Even though the purpose of this guide is to save energy, health, safety, and durability should not be compromised by energy efficiency. Accordingly, combustion safety and ventilation for indoor air quality are addressed first. Durability and attic ventilation then follow. Finally, to maximize energy savings, air sealing is completed prior to insulating. The guide is intended for home remodelers, builders, insulation contractors, mechanical contractors, general contractors who have previously done remodeling and homeowners as a guide to the work that needs to be done.

  7. Sealed Bids | Y-12 National Security Complex

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power AdministrationRobust, High-ThroughputUpcomingmagnetoresistance | ArgonnePrinceton PlasmaSea change forSealed

  8. Tips: Sealing Air Leaks | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative FuelsofProgram: Report1538-1950 Timeline of Events: 1938-1950InsulationLightingSealing

  9. RADIOACTIVE MATERIAL SHIPPING PACKAGINGS AND METAL TO METAL SEALS FOUND IN THE CLOSURES OF CONTAINMENT VESSELS INCORPORATING CONE SEAL CLOSURES

    SciTech Connect (OSTI)

    Loftin, B; Glenn Abramczyk, G; Allen Smith, A

    2007-06-06

    The containment vessels for the Model 9975 radioactive material shipping packaging employ a cone-seal closure. The possibility of a metal-to-metal seal forming between the mating conical surfaces, independent of the elastomer seals, has been raised. It was postulated that such an occurrence would compromise the containment vessel hydrostatic and leakage tests. The possibility of formation of such a seal has been investigated by testing and by structural and statistical analyses. The results of the testing and the statistical analysis demonstrate and procedural changes ensure that hydrostatic proof and annual leakage testing can be accomplished to the appropriate standards.

  10. Physics Basis and Mechanical Design of the Actively Cooled Duct Scraper Protection for the JET Neutral Beam Enhancement

    E-Print Network [OSTI]

    Physics Basis and Mechanical Design of the Actively Cooled Duct Scraper Protection for the JET Neutral Beam Enhancement

  11. Bipolar battery with array of sealed cells

    DOE Patents [OSTI]

    Kaun, Thomas D. (New Lenox, IL); Smaga, John A. (Lemont, IL)

    1987-01-01

    A lithium alloy/metal sulfide battery as a dipolar battery is disclosed with an array of stacked cells with the anode and cathode electrode materials in each cell sealed in a confining structure and separated from one another except across separator material interposed therebetween. The separator material is contained in a module having separate perforated metallic sheets that sandwich opposite sides of the separator material for the cell and an annular insulating spacer that surrounds the separator material beyond the perforations and is also sandwiched between and sealed to the sheets. The peripheral edges of the sheets project outwardly beyond the spacer, traverse the side edges of the adjacent electrode material to form cup-like electrode holders, and are fused to the adjacent current collector or end face members of the array. Electrolyte is infused into the electrolyte cavity through the perforations of one of the metallic sheets with the perforations also functioning to allow ionic conductance across the separator material between the adjacent electrodes. A gas-tight housing provides an enclosure of the array.

  12. Sealed joint structure for electrochemical device

    DOE Patents [OSTI]

    Tucker, Michael C; Jacobson, Craig P; De Jonghe, Lutgard C; Visco, Steven J

    2013-05-21

    Several members make up a joint in a high-temperature electrochemical device, wherein the various members perform different functions. The joint is useful for joining multiple cells (generally tubular modules) of an electrochemical device to produce a multi-cell segment-in-series stack for a solid oxide fuel cell, for instance. The joint includes sections that bond the joining members to each other; one or more seal sections that provide gas-tightness, and sections providing electrical connection and/or electrical insulation between the various joining members. A suitable joint configuration for an electrochemical device has a metal joint housing, a first porous electrode, a second porous electrode, separated from the first porous electrode by a solid electrolyte, and an insulating member disposed between the metal joint housing and the electrolyte and second electrode. One or more brazes structurally and electrically connects the first electrode to the metal joint housing and forms a gas tight seal between the first electrode and the second electrode.

  13. Design of an Overmoded-Waveguide Directional Antenna for Use in In-Building Ventilation Duct Wireless Networks

    E-Print Network [OSTI]

    Stancil, Daniel D.

    Design of an Overmoded-Waveguide Directional Antenna for Use in In-Building Ventilation Duct ventilation ducts. We obtain experimentally the element size and spacing of a reflector and driven element that can be used for IEEE 802.11b/g/n signals in a cylindrical duct to provide 3.1 dB of gain and a front

  14. Cut-on cut-off transition in flow ducts: comparing multiple-scales and finite-element solutions

    E-Print Network [OSTI]

    Eindhoven, Technische Universiteit

    Cut-on cut-off transition in flow ducts: comparing multiple-scales and finite-element solutions Eindhoven, The Netherlands. The phenomenon of cut-on cut-off transition of acoustic modes in ducts with mean from a numerical finite-element method. The analytical solution, derived for an arbitrary duct

  15. Numerical Analysis of Turbine Blade Cooling Ducts M.J. Noot and R.M.M. Mattheij

    E-Print Network [OSTI]

    Eindhoven, Technische Universiteit

    Numerical Analysis of Turbine Blade Cooling Ducts M.J. Noot and R.M.M. Mattheij Eindhoven the cooling ducts with ribs, so­called turbulators. It is investigated how these ribs influence the heat the quality of these cooling ducts. 1 Introduction Gas turbines play an important role in aviation

  16. Design of efficient lens ducts Rulian Fu, Guangjun Wang, Zhaoqi Wang, Enxu Ba, Guoguang Mu, and Xin-Hua Hu

    E-Print Network [OSTI]

    Design of efficient lens ducts Rulian Fu, Guangjun Wang, Zhaoqi Wang, Enxu Ba, Guoguang Mu, and Xin-Hua Hu Lens ducts have the potential to couple the output from a laser diode array efficiently- tigate different design approaches of lens ducts and demonstrate the possibility to obtain an output beam

  17. Title: Overexpression of Follistatin in the Mouse Epididymis Disrupts Fluid Resorption and Sperm Transit in Testicular Excurrent Ducts.

    E-Print Network [OSTI]

    and Sperm Transit in Testicular Excurrent Ducts. Short Title: Elevated follistatin causes epididymal ducts and initial segment of the epididymis, as indicated by accumulation of fluid and sperm stasis is essential for normal testicular excurrent duct function and that its blockade impairs fertility

  18. Wednesday, 06 October, 2010 Contrasting the efficiency of radiation belt losses caused by ducted and non-1

    E-Print Network [OSTI]

    Otago, University of

    Wednesday, 06 October, 2010 1 Contrasting the efficiency of radiation belt losses caused by ducted and non-1 ducted whistler mode waves from ground-based transmitters2 Craig J. Rodger and Bonar R. Carson3 plasmaspheric whistler ducts which guide the waves. For non-guided cases these waves are21 said to be "nonducted

  19. 1736 IEEE TRANSACTIONS ON COMMUNICATIONS, VOL. 51, NO. 10, OCTOBER 2003 Impulse Response of the HVAC Duct as a

    E-Print Network [OSTI]

    Stancil, Daniel D.

    of the HVAC Duct as a Communication Channel Pavel V. Nikitin, Member, IEEE, Daniel D. Stancil, Senior Member (HVAC) ducts in buildings behave as multimode waveguides when excited at radio frequencies and thus, can be used to distribute radio signals. The channel properties of the ducts are different from the properties

  20. Stability analysis and design of time-domain acoustic impedance boundary conditions for lined duct with mean flow

    E-Print Network [OSTI]

    Huang, Xun

    Stability analysis and design of time-domain acoustic impedance boundary conditions for lined duct in a lined duct with uniform mean flow, which has important practical interest for noise emission by aero boundary conditions act as closed-loop feedbacks to an overall duct acoustic system. It turns out

  1. Secondary ow and forced convection heat transfer near endwall boundary layer fences in a 90 turning duct

    E-Print Network [OSTI]

    Camci, Cengiz

    ° turning duct Cengiz Camci *, Dean H. Rizzo Turbomachinery Heat Transfer Laboratory, Department with the secondary Żow and heat transfer aspects of endwall boundary layer fences in 90° turning ducts. Boundary coolant channel is simulated by a 90° turning duct (ReD 360,000) to study the aerothermal interaction

  2. Study of instabilities and quasi-two-dimensional turbulence in volumetrically heated magnetohydrodynamic flows in a vertical rectangular duct

    E-Print Network [OSTI]

    Abdou, Mohamed

    magnetohydrodynamic flows in a vertical rectangular duct N. Vetcha, S. Smolentsev, M. Abdou, and R. Moreau Citation in a vertical rectangular duct N. Vetcha,1 S. Smolentsev,1,a) M. Abdou,1 and R. Moreau2 1 Mechanical 2013; published online 15 February 2013) We consider magnetohydrodynamic (MHD) rectangular duct flows

  3. RedSeal Comments on "Smart Grid RFI: Addressing Policy and Logistical...

    Energy Savers [EERE]

    RedSeal Comments on "Smart Grid RFI: Addressing Policy and Logistical Challenges. RedSeal Comments on "Smart Grid RFI: Addressing Policy and Logistical Challenges. RedSeal Comments...

  4. Identification of dynamic force coefficients of a labyrinth and gas damper seal using impact load excitations 

    E-Print Network [OSTI]

    Ransom, David Lawrence

    1997-01-01

    Experiments to identify stiffness and damping force coefficients of a two bladed teeth-on-stator labyrinth seal and a gas damper seal, both of diverging clearance, are presented. Calibrated impact guns excite a housing holding the test seal...

  5. A study of the effects of eccentricity on honeycomb annular gas seals 

    E-Print Network [OSTI]

    Weatherwax, Mark

    2001-01-01

    Results are presented which show the effects of eccentricity on high pressure honeycomb and smooth annular gas seals. The results of the experiments indicate the ability to utilize centered seal solutions for rotordynamic coefficients and seal...

  6. Notes 12. (a) Annular pressure (damper) seals, and (b) Hydrostatic journal bearings 

    E-Print Network [OSTI]

    San Andres, Luis

    2009-01-01

    The mechanism of centering stiffness in seals. Force coefficients for short-length pressure seals. Design of annular seals: swirl brakes, impact on rotordynamics. Hydrostatic bearings in modern applications. The principle of hydrostatic lubrication...

  7. Turbine rotor-stator leaf seal and related method

    DOE Patents [OSTI]

    Herron, William Lee (Cincinnati, OH); Butkiewicz, Jeffrey John (Simpsonville, SC)

    2003-01-01

    A seal assembly for installation between rotating and stationary components of a machine includes a first plurality of leaf spring segments secured to the stationary component in a circumferential array surrounding the rotating component, the leaf spring segments each having a radial mounting portion and a substantially axial sealing portion, the plurality of leaf spring segments shingled in a circumferential direction.

  8. Dry compliant seal for phosphoric acid fuel cell

    DOE Patents [OSTI]

    Granata, Jr., Samuel J. (South Greensburg, PA); Woodle, Boyd M. (N. Huntingdon Township, Westmoreland County, PA)

    1990-01-01

    A dry compliant overlapping seal for a phosphoric acid fuel cell preformed f non-compliant Teflon to make an anode seal frame that encircles an anode assembly, a cathode seal frame that encircles a cathode assembly and a compliant seal frame made of expanded Teflon, generally encircling a matrix assembly. Each frame has a thickness selected to accommodate various tolerances of the fuel cell elements and are either bonded to one of the other frames or to a bipolar or end plate. One of the non-compliant frames is wider than the other frames forming an overlap of the matrix over the wider seal frame, which cooperates with electrolyte permeating the matrix to form a wet seal within the fuel cell that prevents process gases from intermixing at the periphery of the fuel cell and a dry seal surrounding the cell to keep electrolyte from the periphery thereof. The frames may be made in one piece, in L-shaped portions or in strips and have an outer perimeter which registers with the outer perimeter of bipolar or end plates to form surfaces upon which flanges of pan shaped, gas manifolds can be sealed.

  9. Analog Video Authentication and Seal Verification Equipment Development

    SciTech Connect (OSTI)

    Gregory Lancaster

    2012-09-01

    Under contract to the US Department of Energy in support of arms control treaty verification activities, the Savannah River National Laboratory in conjunction with the Pacific Northwest National Laboratory, the Idaho National Laboratory and Milagro Consulting, LLC developed equipment for use within a chain of custody regime. This paper discussed two specific devices, the Authentication Through the Lens (ATL) analog video authentication system and a photographic multi-seal reader. Both of these devices have been demonstrated in a field trial, and the experience gained throughout will also be discussed. Typically, cryptographic methods are used to prove the authenticity of digital images and video used in arms control chain of custody applications. However, in some applications analog cameras are used. Since cryptographic authentication methods will not work on analog video streams, a simple method of authenticating analog video was developed and tested. A photographic multi-seal reader was developed to image different types of visual unique identifiers for use in chain of custody and authentication activities. This seal reader is unique in its ability to image various types of seals including the Cobra Seal, Reflective Particle Tags, and adhesive seals. Flicker comparison is used to compare before and after images collected with the seal reader in order to detect tampering and verify the integrity of the seal.

  10. Stirling engine or heat pump having an improved seal

    DOE Patents [OSTI]

    White, Maurice A. (2802 S. Everett Pl., Kennewick, WA 99337); Riggle, Peter (616 Fuller, Richland, WA 99352); Emigh, Stuart G. (67 Park St., Richland, WA 99352)

    1985-01-01

    A Stirling Engine or Heat Pump having two relatively movable machine elements for power transmission purposes includes a hermetic seal bellows interposed between the elements for separating a working gas from a pressure compensating liquid that balances pressure across the bellows to reduce bellows stress and to assure long bellows life. The volume of pressure compensating liquid displaced due to relative movement between the machine elements is minimized by enclosing the compensating liquid within a region exposed to portions of both machine elements at one axial end of a slidable interface presented between them by a clearance seal having an effective diameter of the seal bellows. Pressure equalization across the bellows is achieved by a separate hermetically sealed compensator including a movable enclosed bellows. The interior of the compensator bellows is in communication with one side of the seal bellows, and its exterior is in communication with the remaining side of the seal bellows. A buffer gas or additional liquid region can be provided at the remaining axial end of the clearnace seal, along with valved arrangements for makeup of liquid leakage through the clearance seal.

  11. A Residential Duct Leakage Case Study on 'Good Cents' Homes 

    E-Print Network [OSTI]

    Bryant, J. A.; Perez, R.

    2001-01-01

    an introduction. Home Energy Magazine Online. (Available at http://hem.dis.anl.gov/eehem/93/930909.html). Hummarlund, J., Proctor, J., Kast, G., & Ward, T. (1992). Enhancing the Performance of HVAC and Distribution. Proceedings ACEEE Summer Study on Energy.... (Available at http://hem.dis.anl.gov/eehem/93/930911.html Reliant Energy. 2000. Ductwork with a minimum insulation value of R-6 that is sealed with ?state-of-the-art? mastic sealant. Reliant Energy, Houston, Texas. (Available at http...

  12. HOW TO HEAT AND COOL A HOME WITH 400 CFM SUPPLY AIR AND KEEP THE DUCTS IN THE CONDITIONED SPACE

    SciTech Connect (OSTI)

    ANDREWS,J.W.

    1999-05-01

    A design strategy is presented that can enable a typical new home to be heated, cooled, and ventilated with less than 400 cfm of delivered air. The strategy has three major elements. First, peak cooling loads are minimized by using good available technologies for the envelope, with emphasis on minimizing heat gains through the windows. Second, the envelope is designed to have very low natural air leakage rates, such that all the ventilation air can be drawn in at one point and passed over the cooling coil before it is mixed with the house air. This permits a significant portion of the cooling load to be met at an air flow rate of {approximately}200 cubic feet per minute (cfm) per ton, compared with the typical 400 cfm per ton in standard air-conditioning systems. Third, by reducing the amount of supply air needed to meet the envelope loads, the required size of ductwork is reduced, making it easier to locate the ducts within the conditioned space. This reduces duct loads to zero, completing the three-part energy conserving strategy.

  13. The influence of a central groove on static and dynamic characteristics of an annular liquid seal with laminar flow 

    E-Print Network [OSTI]

    Graviss, Matthew Sheridan

    2005-08-29

    This thesis provides experimental static and dynamic results for four pairs of seals, including a pair of smooth seals and three pairs of centrally grooved seals. The grooved seals have groove depth to clearance ratios ...

  14. Photogrammetry as a tool for estimating size and condition in the Hawaiian monk seal (Monachus schauinslandi), the harbor seal (Phoca vitulina), and the northern elephant seal (Mirounga anguistirosis) 

    E-Print Network [OSTI]

    McFadden, Katherine Walton

    1999-01-01

    A photographic technique was developed to indirectly estimate mass and body condition of the endangered Hawaiian monk seal (Monachus schauinslandi). This project differs from other photogrammetric studies because subjects were photographed under...

  15. Mathematical model of the Beta Rand Cam{trademark} engine vane seals

    SciTech Connect (OSTI)

    Braden, C.H.; Thompson, G.J.; Smith, J.E.; Mucino, V.H.

    1996-12-31

    A mathematical model of the vane sealing mechanism is presented to determine how the loading on the seals will affect the performance of the Rand Cam{trademark} engine. Within the Rand Cam{trademark} engine, sacrificial linear seals in the vane are used as the main sealing mechanism to prevent blowby from one chamber to the next. Throughout this investigation a kinetostatic analysis, based upon Yamamoto`s Wankel apex seal analysis, is extended into three dimensions. The input data to the model can be varied to study the effects of seal dimensions, seal material, seal dynamics, and friction.

  16. High-Temperature Zirconia Oxygen Sensor with Sealed Metal/Metal...

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

    High-Temperature Zirconia Oxygen Sensor with Sealed MetalMetal Oxide Internal Reference High-Temperature Zirconia Oxygen Sensor with Sealed MetalMetal Oxide Internal Reference...

  17. Device for temporarily closing duct-formers in well completion apparatus

    SciTech Connect (OSTI)

    Zandmer, H.M.; Zandmer, S.M.

    1981-08-25

    A duct-forming device is disclosed for use in a well completion apparatus of the kind, wherein a bore hole casing is positioned in a bore hole and duct-forming devices of alkali- and acid resistant metal-such as steel-are secured at spaced levels to the casing in alignment with holes machined in the casing wall. In accordance with the invention, a closure device is arranged within the duct-forming device which permits flow of predetermined amounts of liquid, such as acid, from the interior of the casing through the duct-forming device and into the producing formation, while gradually being moved by the liquid into a position in which such fluid flow is prevented. After the fluid flow has been stopped by the closure device and when the formation pressure exceeds the pressure within the duct-forming device and the casing, fluid from the formation then forces the closure device toward and into the casing space to permit thereafter free flow of formation fluid into the duct-forming device and the casing or of pressurized treatment liquid from the casing into the formation. The inventive arrangement permits inter alia the establishment of a sufficient and substantially uniform feeding rate of treatment liquid, such as acid, from the casing into the producing formation through all the duct-formers in preparation for subsequent acidification or other treatments, such as sand fracking.

  18. DRAFT Ice Seal Stranding Events Ice seals in the National Marine Fisheries Service Alaska Region (NMFS AKR) stranding records

    E-Print Network [OSTI]

    Cannot be determined 1 Entanglement 1 Floater 3 Out of habitat 2 Pos. collision 1 Pos. shot 2 seal CBD WAK Naknek Wilder, J.; NMFS OLE Kodiak; unconfirmed Fdead pos. collision towed see outcome 1 Ringed seal CBD Arctic Deadhorse ARCO; Rugh, D.:NMML; Confirmed-low Fdead pos. shot towed see

  19. A 12-MW-scale pilot study of in-duct scrubbing (IDS) using a rotary atomizer

    SciTech Connect (OSTI)

    Samuel, E.A.; Murphy, K.R.; Demian, A.

    1989-11-01

    A low-cost, moderate-removal efficiency, flue gas desulfurization (FGD) technology was selected by the US Department of Energy for pilot demonstration in its Acid Rain Precursor Control Technology Initiative. The process, identified as In-Duct Scrubbing (IDS), applies rotary atomizer techniques developed for lime-based spray dryer FGD while utilizing existing flue gas ductwork and particulate collectors. IDS technology is anticipated to result in a dry desulfurization process with a moderate removal efficiency (50% or greater) for high-sulfur coal-fired boilers. The critical elements for successful application are: (1) adequate mixing of sorbent droplets with flue gas for efficient reaction contact, (2) sufficient residence time to produce a non-wetting product, and (3) appropriate ductwork cross-sectional area to prevent deposition of wet reaction products before particle drying is comple. The ductwork in many older plants, previously modified to meet 1970 Clean Air Act requirements for particulate control, usually meet these criteria. A 12 MW-scale IDS pilot plant was constructed at the Muskingum River Plant of the American Electric Power System. The pilot plant, which operates from a slipstrem attached to the air-preheater outlet duct from the Unit 5 boiler at the Muskingum River Plant (which burns about 4% sulfur coal), is equipped with three atomizer stations to test the IDS concept in vertical and horizontal configurations. In addition, the pilot plant is equipped to test the effect of injecting IDS off- product upstream of the atomizer, on SO{sub 2}and NO{sub x} removals.

  20. Digital Manufacturing of Gradient Meshed SOFC Sealing Composites with Self-Healing Capabilities

    SciTech Connect (OSTI)

    Kathy Lu; Christopher Story; W.T. Reynolds

    2007-12-21

    Solid oxide fuel cells (SOFC) hold great promise for clean power generation. However, high temperature stability and long term durability of the SOFC components have presented serious problems in SOFC technological advancement and commercialization. The seals of the fuel cells are the most challenging area to address. A high temperature gas seal is highly needed which is durable against cracking and gas leakage during thermal cycling and extended operation. This project investigates a novel composite seal by integrating 3D printed shape memory alloy (SMA) wires into a glass matrix. The SMA we use is TiNiHf and the glass matrix we use is SrO-La{sub 2}O{sub 3}-Al{sub 2}O{sub 3}-B{sub 2}O{sub 3}-SiO{sub 2} (SLABS). Dilatometry shows to be an extremely useful tool in providing the CTEs. It pinpoints regions of different CTEs under simulated SOFC thermal cycles for the same glass. For the studied SLABS glass system, the region with the greatest CTE mismatch between the glass seal and the adjacent components is 40-500 C, the typical heating and cooling regions for SOFCs. Even for low temperature SOFC development, this region is still present and needs to be addressed. We have demonstrated that the proposed SLABS glass has great potential in mitigating the thermal expansion mismatch issues that are limiting the operation life of SOFCs. TiNiHf alloy has been successfully synthesized with the desired particle size for the 3DP process. The TiNiHf SMA shape memory effect very desirably overlaps with the problematic low CTE region of the glass. This supports the design intent that the gradient structure transition, phase transformation toughening, and self-healing of the SMA can be utilized to mitigate/eliminate the seal problem. For the 3DP process, a new binder has been identified to match with the specific chemistry of the SMA particles. This enables us to directly print SMA particles. Neutron diffraction shows to be an extremely useful tool in providing information regarding the austenite to martensite phase transformation, SMA alloy lattice constant change, and the corresponding thermal stress from the glass matrix. It pinpoints regions of SMA phase transformation and the thermal stress effect under simulated SOFC thermal cycles. The bilayer test shows that there is still much work to be done for the proper integration of the seal components. Large scale production should lower the cost associated with the proposed approach, especially on the raw material cost and 3D printing.

  1. Qualification of Fan Generated Duct Rumble Noise: Part 1: Test Facility(RP 1219) 

    E-Print Network [OSTI]

    Kading, J.; Mann, A.; Pate, M.B.

    2008-01-01

    :4. The transition was enclosed in a 53” by 93” by 3’ tall box constructed from MDF and lined with 2” duct board fiber- glass. The box was designed to isolate the transition duct from break in noise from the fan room. The fiberglass insulation on the inside... (MDF) shell that was mounted on a 2x4 structure. The interior consisted of three layers. The first was fiberglass board 2’x 4’ x 2”, these boards were cut to be stacked and fill in between the MDF and the duct lining insu- lation. The second layer...

  2. Carbon Dioxide Sealing Capacity: Textural or Compositional Controls?

    SciTech Connect (OSTI)

    Cranganu, Constantin; Soleymani, Hamidreza; Sadiqua, Soleymani; Watson, Kieva

    2013-11-30

    This research project is aiming to assess the carbon dioxide sealing capacity of most common seal-rocks, such as shales and non-fractured limestones, by analyzing the role of textural and compositional parameters of those rocks. We hypothesize that sealing capacity is controlled by textural and/or compositional pa-rameters of caprocks. In this research, we seek to evaluate the importance of textural and compositional parameters affecting the sealing capacity of caprocks. The conceptu-al framework involves two testable end-member hypotheses concerning the sealing ca-pacity of carbon dioxide reservoir caprocks. Better understanding of the elements controlling sealing quality will advance our knowledge regarding the sealing capacity of shales and carbonates. Due to relatively low permeability, shale and non-fractured carbonate units are considered relatively imper-meable formations which can retard reservoir fluid flow by forming high capillary pres-sure. Similarly, these unites can constitute reliable seals for carbon dioxide capture and sequestration purposes. This project is a part of the comprehensive project with the final aim of studying the caprock sealing properties and the relationship between microscopic and macroscopic characteristics of seal rocks in depleted gas fields of Oklahoma Pan-handle. Through this study we examined various seal rock characteristics to infer about their respective effects on sealing capacity in special case of replacing reservoir fluid with super critical carbon dioxide (scCO{sub 2}). To assess the effect of textural and compositional properties on scCO{sub 2} maximum reten-tion column height we collected 30 representative core samples in caprock formations in three counties (Cimarron, Texas, Beaver) in Oklahoma Panhandle. Core samples were collected from various seal formations (e.g., Cherokee, Keys, Morrowan) at different depths. We studied the compositional and textural properties of the core samples using several techniques. Mercury Injection Porosimetry (MIP), Scanning Electron Microsco-py SEM, and Sedigraph measurements are used to assess the pore-throat-size distribu-tion, sorting, texture, and grain size of the samples. Also, displacement pressure at 10% mercury saturation (Pd) and graphically derived threshold pressure (Pc) were deter-mined by MIP technique. SEM images were used for qualitative study of the minerals and pores texture of the core samples. Moreover, EDS (Energy Dispersive X-Ray Spec-trometer), BET specific surface area, and Total Organic Carbon (TOC) measurements were performed to study various parameters and their possible effects on sealing capaci-ty of the samples. We found that shales have the relatively higher average sealing threshold pressure (Pc) than carbonate and sandstone samples. Based on these observations, shale formations could be considered as a promising caprock in terms of retarding scCO{sub 2} flow and leak-age into above formations. We hypothesized that certain characteristics of shales (e.g., 3 fine pore size, pore size distribution, high specific surface area, and strong physical chemical interaction between wetting phase and mineral surface) make them an effi-cient caprock for sealing super critical CO{sub 2}. We found that the displacement pressure at 10% mercury saturation could not be the ultimate representative of the sealing capacity of the rock sample. On the other hand, we believe that graphical method, introduced by Cranganu (2004) is a better indicator of the true sealing capacity. Based on statistical analysis of our samples from Oklahoma Panhandle we assessed the effects of each group of properties (textural and compositional) on maximum supercriti-cal CO{sub 2} height that can be hold by the caprock. We conclude that there is a relatively strong positive relationship (+.40 to +.69) between supercritical CO{sub 2} column height based on Pc and hard/ soft mineral content index (ratio of minerals with Mohs hardness more than 5 over minerals with Mohs hardness less than 5) in both shales and limestone samples. Average median pore rad

  3. MECHANICAL PROPERTY CHARACTERIZATIONS AND PERFORMANCE MODELING OF SOFC SEALS

    SciTech Connect (OSTI)

    Koeppel, Brian J.; Vetrano, John S.; Nguyen, Ba Nghiep; Sun, Xin; Khaleel, Mohammad A.

    2008-03-26

    This study provides modeling tools for the design of reliable seals for SOFC stacks. The work consists of 1) experimental testing to determine fundamental properties of SOFC sealing materials, and 2) numerical modeling of stacks and sealing systems. The material tests capture relevant temperature-dependent physical and mechanical data needed by the analytical models such as thermal expansion, strength, fracture toughness, and relaxation behavior for glass-ceramic seals and other materials. Testing has been performed on both homogenous specimens and multiple material assemblies to investigate the effect of interfacial reactions. A viscoelastic continuum damage model for a glass-ceramic seal was developed to capture the nonlinear behavior of this material at high temperatures. This model was implemented in the MSC MARC finite element code and was used for a detailed analysis of a planar SOFC stack under thermal cycling conditions. Realistic thermal loads for the stack were obtained using PNNL’s in-house multiphysics solver. The accumulated seal damage and component stresses were evaluated for multiple thermal loading cycles, and regions of high seal damage susceptible to cracking were identified. Selected test results, numerical model development, and analysis results will be presented.

  4. Trap seal for open circuit liquid cooled turbines

    DOE Patents [OSTI]

    Grondahl, Clayton M. (Clifton Park, NY); Germain, Malcolm R. (Ballston Lake, NY)

    1980-01-01

    An improved trap seal for open circuit liquid cooled turbines is disclosed. The trap seal of the present invention includes an annular recess formed in the supply conduit of cooling channels formed in the airfoil of the turbine buckets. A cylindrical insert is located in the annular recesses and has a plurality of axial grooves formed along the outer periphery thereof and a central recess formed in one end thereof. The axial grooves and central recess formed in the cylindrical insert cooperate with the annular recess to define a plurality of S-shaped trap seals which permit the passage of liquid coolant but prohibit passage of gaseous coolant.

  5. Flexible edge seal for vacuum insulating glazing units

    SciTech Connect (OSTI)

    Bettger, Kenneth J.; Stark, David H.

    2012-12-11

    A flexible edge seal is provided for a vacuum insulating glazing unit having a first glass pane and a second glass pane spaced-apart from the first. The edge seal comprises a seal member formed of a hermetically bondable material and having a first end, a second end and a center section disposed therebetween. The first end is hermetically bondable to a first glass pane. The second end is hermetically bondable to a second glass pane. The center section comprises a plurality of convolutes.

  6. Method of sealing an ultracapacitor substantially free of water

    DOE Patents [OSTI]

    Chapman-Irwin, Patricia (Altamont, NY); Feist, Thomas Paul (Clifton Park, NY)

    2002-04-02

    A method of sealing an ultracapacitor substantially free of water is disclosed. The method includes providing a multilayer cell comprising two solid, non porous current collectors, separated by two porous electrodes with a separator between the two electrodes, sealing the cell with a reclosable hermetic closure. Water inside the closure is dissociated by an applied voltage to the cell and escapes in the form of hydrogen and oxygen when the closure is unmated, the closure is then mated to hermetically seal the cell which is substantially free of water.

  7. Static Pressure Losses in 6 in., 8 in., and 10 in. Nonmetallic Flexible Duct (RP-1333) 

    E-Print Network [OSTI]

    Weaver, K.; Culp, C.H.

    2007-01-01

    with permission of the copyright owner. Further reproduction prohibited without permission. Static Pressure Losses in Nonmetallic Flexible Duct Weaver, Kevin;Culp, Charles ASHRAE Transactions; 2007; 113, ProQuest pg. 400 Reproduced with permission...

  8. Turbulent mixing in ducts, theory and experiment application to aerosol single point sampling 

    E-Print Network [OSTI]

    Langari, Abdolreza

    1997-01-01

    The Environmental Protection Agency (EPA) has announced rules for continuous emissions monitoring (CEM) of stacks and ducts in nuclear facilities. EPA has recently approved use of Alternative Reference Methodologies (ARM) for air sampling in nuclear...

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

    E-Print Network [OSTI]

    Tichenor, Nathan Ryan

    2009-05-15

    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...

  10. Inspection, Assessment, and Repair of Grouted Ducts in Post-tensioned Bridge 

    E-Print Network [OSTI]

    Im, Seok Been

    2011-02-22

    Segmental post-tensioned (PT) bridges are major structures that carry significant traffic. Recent investigations of these bridges have identified voids in their ducts. and some of these exposed strands at these void locations are undergoing...

  11. On the Fundamental Unsteady Fluid Dynamics of Shock-Induced Flows through Ducts 

    E-Print Network [OSTI]

    Mendoza, Nicole Renee

    2013-04-29

    Unsteady shock wave propagation through ducts has many applications, ranging from blast wave shelter design to advanced high-speed propulsion systems. The research objective of this study was improved fundamental understanding of the transient flow...

  12. An Experimental Evaluation of Duct-Mounted Relative Humidity Sensors: Part 2 – Accuracy Results 

    E-Print Network [OSTI]

    Joshi, S.N.; Pate, M.B.; Nelson, R.M; House, J.H.; Klaasen, C.J.

    2005-01-01

    Reproduced with permission of the copyright owner. Further reproduction prohibited without permission. An Experimental Evaluation of Duct-Mounted Relative Humidity Sensors: Part 2-Accuracy Results Joshi, Shailesh N;House, John M;Pate, Michael B...

  13. DOE Zero Energy Ready Home Ducts in Conditioned Space Webinar (Text Version)

    Broader source: Energy.gov [DOE]

    Below is a text version of the webinar titled "Design Strategies for Ducts in Conditioned Spaces," originally presented in March 2014 and part of DOE Challenge Home's Tech Training Webinar Series....

  14. Augmentation of Power Output of Axisymmetric Ducted Wind Turbines by Porous Trailing Edge Disks

    E-Print Network [OSTI]

    widnall, sheila

    2014-06-30

    This paper presents analytical and experimental results that demonstrated that the power output from a ducted wind turbine can be dramatically increased by the addition of a trailing edge device such as a porous disk. In ...

  15. Observations on the Anterior Testicular Ducts in Snakes With Emphasis on Sea Snakes and

    E-Print Network [OSTI]

    Sever, David M.

    and Ultrastructure in the Yellow-Bellied Sea Snake, Pelamis platurus David M. Sever* and Layla R. Freeborn Department, Pelamis platurus, only the third such study on snakes. The anterior testicular ducts are similar in his

  16. A Computational Study of Icing Effects on the Performance of an S-Duct Inlet

    E-Print Network [OSTI]

    Jin, Wonjin

    2009-01-01

    The performance of a diffusing S-duct inlet (M2129) is computationally studied for the effects of inlet icing. Different ice accretion shapes, predicted by numerical analysis in the literature reviewed, are simulated on the inlet lip. Two commercial...

  17. Building America Technology Solutions for New and Existing Homes...

    Energy Savers [EERE]

    Strategies on 1-12 Story Homes in Cold Climates, Minneapolis, MN Building America Technology Solutions for New and Existing Homes: Cost Analysis of Roof-Only Air Sealing...

  18. June 2015 Most Viewed Documents for Fission And Nuclear Technologies...

    Office of Scientific and Technical Information (OSTI)

    June 2015 Most Viewed Documents for Fission And Nuclear Technologies Estimation of gas leak rates through very small orifices and channels. From sealed PuOsub 2 containers under...

  19. Comparative Study: CFD ?P Versus Measured ?P for 30% Flexible Ducts 

    E-Print Network [OSTI]

    Ugursal, A.; Culp, C.

    2006-01-01

    VERSUS MEASURED ?P FOR 30% FLEXIBLE DUCTS Ahmet U?ursal Ph.D. Student, Department of Architecture Texas A&M University College Station, TX Charles Culp, Ph.D., P.E. Associate Professor, Department of Architecture & Associate Director, Energy... Systems Lab Texas A&M University College Station, TX ABSTRACT This study modeled air flow and pressure drops in non-metallic flexible ducts using Computational Fluid Dynamic (CFD) analysis. CFD simulation results showed very close comparison...

  20. Dynamically Movable Exhausting Emc Sealing System

    DOE Patents [OSTI]

    Barringer, Dennis R. (Wallkill, NY); Seminaro, Edward J. (Milton, NY); Toffler, Harold M. (Newburgh, NY)

    2003-12-09

    A docking apparatus for printed circuit boards including a cassette housing, having a housing base, a housing cover and a housing wall, wherein the housing base and the housing wall are disposed relative to each other so as to define a housing cavity for containing a printed circuit card and wherein the housing wall includes a cable opening disposed so as to be communicated with the housing cavity, a housing bezel, disposed relative to the cassette housing so as to be associated with the cable opening, the housing bezel includes an outer bezel having a first plurality of openings and an inner bezel having a second plurality of apertures, the inner bezel in electrical communication with the printed circuit card, wherein said housing bezel is removable, and an EMC gasket disposed between the outer and inner bezels of said housing bezel, the EMC gasket configured to provide a removable EMC seal proximate the cable opening while still allowing airflow through the first and second plurality of apertures having the EMC gasket therebetween. A docking apparatus for printed circuit boards including a cassette housing, having a housing base, a housing cover and a housing wall, wherein the housing base and the housing wall are disposed relative to each other so as to define a housing cavity for containing a printed circuit card and wherein the housing wall includes a cable opening disposed so as to be communicated with the housing cavity, a housing bezel, disposed relative to the cassette housing so as to be associated with the cable opening, the housing bezel includes an outer bezel having a first plurality of openings and an inner bezel having a second plurality of apertures, the inner bezel in electrical communication with the printed circuit card, wherein said housing bezel is removable, and an EMC gasket disposed between the outer and inner bezels of said housing bezel, the EMC gasket configured to provide a removable EMC seal proximate the cable opening while still allowing airflow through the first and second plurality of apertures having the EMC gasket therebetween.

  1. Method for producing ceramic-glass-ceramic seals by microwave heating

    DOE Patents [OSTI]

    Blake, Rodger D. (Santa Fe, NM); Meek, Thomas T. (Los Alamos, NM)

    1986-01-01

    Method for producing a ceramic-glass-ceramic seal by the use of microwave energy, and a sealing mixture which comprises a glass sealing material, a coupling agent, and an oxidizer. The seal produced exhibits greater strength due to its different microstructure. Sodium nitrate is the most preferred oxidizer.

  2. Rotordynamic evaluation of frequency dependent impedances of hole-pattern gas damper seals 

    E-Print Network [OSTI]

    Holt, Christopher George

    2000-01-01

    Two hole-pattern seals are compared with one smooth bore seal. The two hole-pattern seals have cell depths of 2.03 mm and 3.18 mm with a cell diameter of 1.59 mm. The hole area density factor for both hole-pattern seals is 43%. The L/D ratio...

  3. An optimal path to transition in a duct

    E-Print Network [OSTI]

    Biau, Damien; 10.1098/rsta.2008.0191

    2010-01-01

    This paper is concerned with the transition of the laminar flow in a duct of square cross-section. Like in the similar case of the pipe flow, the motion is linearly stable for all Reynolds numbers, rendering this flow a suitable candidate for a study of the 'bypass' path to turbulence. It has already been shown \\citep{Biau_JFM_2008} that the classical linear optimal perturbation problem, yielding optimal disturbances in the form of longitudinal vortices, fails to provide an 'optimal' path to turbulence, i.e. optimal perturbations do not elicit a significant nonlinear response from the flow. Previous simulations have also indicated that a pair of travelling waves generates immediately, by nonlinear quadratic interactions, an unstable mean flow distortion, responsible for rapid breakdown. By the use of functions quantifying the sensitivity of the motion to deviations in the base flow, the 'optimal' travelling wave associated to its specific defect is found by a variational approach. This optimal solution is the...

  4. Passive wake detection using seal whisker-inspired sensing

    E-Print Network [OSTI]

    Beem, Heather Rachel

    2015-01-01

    This thesis is motivated by a series of biological experiments that display the harbor seal's extraordinary ability to track the wake of an object several seconds after it has swum by. They do so despite having auditory ...

  5. Remote Sealing of Canisters for Hot Isostatic Pressing

    SciTech Connect (OSTI)

    Wahlquist, Dennis; Bateman, Ken; Malewitz, Tim

    2015-03-01

    Battelle Energy Alliance, LLC, has successfully tested a remote welding process to seal radioactive waste containers prior to hot isostatic pressing (HIP). Since the 1990s, a variety of radioactive and hazardous waste forms have been remotely treated using HIP during trials within Idaho National Laboratory (INL) hot cells. For HIP treatment at INL, waste was loaded into a stainless-steel or aluminum canister, which was evacuated, seal welded, and placed in a HIP furnace. HIP simultaneously heats and pressurizes the waste, reducing its volume and increasing its stability, thus lowering the cost and risk associated with disposal. Weld integrity must be ensured in order to prevent the spread of contamination during HIP. This paper presents a process for sealing HIP canisters remotely using modified, commercially available equipment. This process includes evacuation, heating, welding, and weld inspection. The process and equipment have proven to reliably seal canisters in continued HIP trials.

  6. Seal assembly for materials with different coefficients of thermal expansion

    DOE Patents [OSTI]

    Minford, Eric (Laurys Station, PA)

    2009-09-01

    Seal assembly comprising (a) two or more seal elements, each element having having a coefficient of thermal expansion; and (b) a clamping element having a first segment, a second segment, and a connecting segment between and attached to the first and second segments, wherein the two or more seal elements are disposed between the first and second segments of the clamping element. The connecting segment has a central portion extending between the first segment of the clamping element and the second segment of the clamping element, and the connecting segment is made of a material having a coefficient of thermal expansion. The coefficient of thermal expansion of the material of the connecting segment is intermediate the largest and smallest of the coefficients of thermal expansion of the materials of the two or more seal elements.

  7. DOE Logo, Seal and Word Mark | Department of Energy

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

    logo, seal, and word mark are official graphical identifiers of the U.S. Department of Energy and are meant for official use only, to represent the Department's official position....

  8. Computational analysis of spiral groove thrust bearings and face seals 

    E-Print Network [OSTI]

    Zirkelback, Nicole Lisa

    1997-01-01

    Analyses for incompressible and compressible spiral groove thrust bearings (SGTBS) and face seals (SGFSS) are presented. A successive approximation linearizes the partial differential equation of pressure that arises in the compressible fluid...

  9. Better Bearing Housing Seals Prevent Costly Machinery Failures 

    E-Print Network [OSTI]

    Bloch, H. P.

    1993-01-01

    of these failures could be prevented through the use of appropriately engineered, properly selected, and suitably installed bearing housing seals. Associated savings in labor, materials, and energy would accrue due to extended oil change intervals and a portion...

  10. Factories: The Ionising Radiations (Sealed Sources Regulations 1961 

    E-Print Network [OSTI]

    Hare, John

    1961-01-01

    These Regulations Impose requirements for the protection of persons employed in factories and other places to which the Factories Act, 1937, applies, against ionising radiations arising from- (a) sealed sources ; and (b) ...

  11. Factories: The Ionising Radiations (Sealed Sources) (Leakage Test) Order, 1961 

    E-Print Network [OSTI]

    Hare, John

    1961-01-01

    This Order prescribes the test for leakage of radioactive substance to be made of sealed sources and (the particulars to be contained in registers of every such test, required under Regulation 15 of the Ionising ...

  12. Factories: The Ionising Radiations (Sealed Sources) Regulations, 1961 

    E-Print Network [OSTI]

    Her Majesty's Stationary Office

    1961-01-01

    These Regulations impose requirements for the protection of persons employed in factories and other places to which the Factories Act, 1937, applies, against ionising radiations arising from- (a) sealed sources ; and (b) ...

  13. Factories: The Ionising Radiations (Sealed Sources) (Transfer Record) Order, 1961 

    E-Print Network [OSTI]

    Hare, John

    1961-01-01

    This Order prescribes the form of transfer record containing particulars of sums of radiation doses received by certain workers, which record is required by Regulation 31 of the Ionising Radiations (Sealed Sources)Regulations, ...

  14. Factories: The Ionising Radiations (Sealed Sources) (Laboratory Certificate) Order, 1961 

    E-Print Network [OSTI]

    Hare, John

    1961-01-01

    This Order prescribes the particulars to be contained in certificates issued by approved laboratories in pursuance of paragraph (2) of Regulation 23 of the Ionising Radiations (Sealed Sources) Regulations, 1961, as t o ...

  15. Inflatable containment diaphragm for sealing and removing stacks

    DOE Patents [OSTI]

    Meskanick, G.R.; Rosso, D.T.

    1993-04-13

    A diaphragm with an inflatable torus-shaped perimeter is used to seal at least one end of a stack so that debris that might be hazardous will not be released during removal of the stack. A diaphragm is inserted and inflated in the lower portion of a stack just above where the stack is to be cut such that the perimeter of the diaphragm expands and forms a seal against the interior surface of the stack.

  16. Measure Guideline: Air Sealing Attics in Multifamily Buildings

    SciTech Connect (OSTI)

    Otis, C.; Maxwell, S.

    2012-06-01

    This Building America Measure Guideline is intended for owners, builders, contractors, homeowners, and other stakeholders in the multifamily building industry, and focuses on challenges found in existing buildings for a variety of housing types. It explains why air sealing is desirable, explores related health and safety issues, and identifies common air leakage points in multifamily building attics. In addition, it also gives an overview of materials and techniques typically used to perform air sealing work.

  17. Gas impermeable glaze for sealing a porous ceramic surface

    DOE Patents [OSTI]

    Reed, Scott T.; Stone, Ronald G.; Nenoff, Tina M.; Trudell, Daniel E.; Thoma, Steven G.

    2004-04-06

    A process for fabricating a gas impermeable seal on a porous ceramic surface using a thin, glass-based, pinhole free glaze. The process can be used to fabricate gas impermeable end seals on porous alumina tubes used as filter media. The porous alumina tubes can have an inorganic microporous thin film separation membrane on the inner surface, which can be used for high temperature gas separation processes.

  18. Filled glass composites for sealing of solid oxide fuel cells.

    SciTech Connect (OSTI)

    Tandon, Rajan; Widgeon, Scarlett Joyce; Garino, Terry J.; Brochu, Mathieu; Gauntt, Bryan D.; Corral, Erica L.; Loehman, Ronald E.

    2009-04-01

    Glasses filled with ceramic or metallic powders have been developed for use as seals for solid oxide fuel cells (SOFC's) as part of the U.S. Department of Energy's Solid State Energy Conversion Alliance (SECA) Program. The composites of glass (alkaline earth-alumina-borate) and powders ({approx}20 vol% of yttria-stabilized zirconia or silver) were shown to form seals with SOFC materials at or below 900 C. The type and amount of powder were adjusted to optimize thermal expansion to match the SOFC materials and viscosity. Wetting studies indicated good wetting was achieved on the micro-scale and reaction studies indicated that the degree of reaction between the filled glasses and SOFC materials, including spinel-coated 441 stainless steel, at 750 C is acceptable. A test rig was developed for measuring strengths of seals cycled between room temperature and typical SOFC operating temperatures. Our measurements showed that many of the 410 SS to 410 SS seals, made using silver-filled glass composites, were hermetic at 0.2 MPa (2 atm.) of pressure and that seals that leaked could be resealed by briefly heating them to 900 C. Seal strength measurements at elevated temperature (up to 950 C), measured using a second apparatus that we developed, indicated that seals maintained 0.02 MPa (0.2 atm.) overpressures for 30 min at 750 C with no leakage. Finally, the volatility of the borate component of sealing glasses under SOFC operational conditions was studied using weight loss measurements and found by extrapolation to be less than 5% for the projected SOFC lifetime.

  19. Gas-path leakage seal for a gas turbine

    DOE Patents [OSTI]

    Wolfe, C.E.; Dinc, O.S.; Bagepalli, B.S.; Correia, V.H.; Aksit, M.F.

    1996-04-23

    A gas-path leakage seal is described for generally sealing a gas-path leakage-gap between spaced-apart first and second members of a gas turbine (such as combustor casing segments). The seal includes a generally imperforate foil-layer assemblage which is generally impervious to gas and is located in the leakage-gap. The seal also includes a cloth-layer assemblage generally enclosingly contacting the foil-layer assemblage. In one seal, the first edge of the foil-layer assemblage is left exposed, and the foil-layer assemblage resiliently contacts the first member near the first edge to reduce leakage in the ``plane`` of the cloth-layer assemblage under conditions which include differential thermal growth of the two members. In another seal, such leakage is reduced by having a first weld-bead which permeates the cloth-layer assemblage, is attached to the metal-foil-layer assemblage near the first edge, and unattachedly contacts the first member. 4 figs.

  20. Sealed Source Security and Disposition: Progress and Prospects - 13515

    SciTech Connect (OSTI)

    Jennison, Meaghan [National Nuclear Security Administration, Washington, DC (United States)] [National Nuclear Security Administration, Washington, DC (United States); Martin, David W. [National Nuclear Security Administration/Energetics Inc., Washington, DC (United States)] [National Nuclear Security Administration/Energetics Inc., Washington, DC (United States); Cuthbertson, Abigail [US DOE, Washington, DC (United States)] [US DOE, Washington, DC (United States)

    2013-07-01

    Due to their high activity and portability, unsecured or abandoned sealed sources could cause significant health or environmental damage. Further, some of these sources could be used either individually or in aggregate in radiological dispersal devices commonly referred to as 'dirty bombs', resulting in significant social disruption and economic impacts in the billions of dollars. Disposal access for disused sealed sources, however, has been a serious challenge. From 2008 to 2012, sealed source disposal was available to only 14 states; additionally, waste acceptance criteria for sealed sources at the low-level waste disposal facilities in operation both prior to and after 2012 exclude some common yet potentially dangerous sealed sources. Recent developments, however, suggest that significant improvement in addressing this challenge is possible, although challenges remain. These developments include 1) the initiation of operations at the Waste Control Specialists (WCS) commercial low-level radioactive waste (LLRW) disposal facility in Andrews County, Texas; 2) the potential for significant revisions of the U.S. Nuclear Regulatory Commission's (NRC) 1995 'Final Branch Technical Position on Concentration Averaging and Encapsulation' (1995 BTP); and 3) the Utah Department of Environmental Quality's (UDEQ) approval of a license variance for sealed source disposal at the EnergySolutions LLRW disposal facility near Clive, Utah. (authors)

  1. Hermetically sealed electrical feedthrough for high temperature secondary cells

    DOE Patents [OSTI]

    Knoedler, R.; Nelson, P.A.; Shimotake, H.; Battles, J.E.

    1983-07-26

    A passthrough seal is disclosed for electrically isolating the terminal in a lithium/metal sulfide cell from the structural cell housing. The seal has spaced upper and lower insulator rings fitted snuggly between the terminal and an annularly disposed upstanding wall, and outwardly of a powdered insulator also confined between the upstanding wall and terminal. The adjacent surfaces of the upper insulator ring and the respective upstanding wall and terminal are conically tapered, diverging in the axial direction away from the cell interior, and a sealing ring is located between each pair of the adjacent surfaces. The components are sized so that upon appropriate movement of the upper insulator ring toward the lower insulator ring the powdered insulator and sealing rings are each compressed to a high degree. This compacts the powdered insulator thereby rendering the same highly impervious and moreover fuses the sealing rings to and between the adjacent surfaces. The upper and lower insulator rings might be formed of beryllium oxide and/or alumina, the powdered insulator might be formed of boron nitride, and the sealing rings might be formed of aluminum.

  2. Hermetically sealed electrical feedthrough for high temperature secondary cells

    DOE Patents [OSTI]

    Knoedler, Reinhard (Nussloch, DE); Nelson, Paul A. (Wheaton, IL); Shimotake, Hiroshi (Hinsdale, IL); Battles, James E. (Oak Forest, IL)

    1985-01-01

    A passthrough seal is disclosed for electrically isolating the terminal in a lithium/metal sulfide cell from the structural cell housing. The seal has spaced upper and lower insulator rings fitted snuggly between the terminal and an annularly disposed upstanding wall, and outwardly of a powdered insulator also confined between the upstanding wall and terminal. The adjacent surfaces of the upper insulator ring and the respective upstanding wall and terminal are conically tapered, diverging in the axial direction away from the cell interior, and a sealing ring is located between each pair of the adjacent surfaces. The components are sized so that upon appropriate movement of the upper insulator ring toward the lower insulator ring the powdered insulator and sealing rings are each compressed to a high degree. This compacts the powdered insulator thereby rendering the same highly impervious and moreover fuses the sealing rings to and between the adjacent surfaces. The upper and lower insulator rings might be formed of beryllium oxide and/or alumina, the powdered insulator might be formed of boron nitride, and the sealing rings might be formed of aluminum.

  3. Shape memory alloy seals for geothermal applications. Final report. Report ESG-82-14

    SciTech Connect (OSTI)

    Friske, Warren H.; Schwartzbart, Harry

    1982-07-30

    A novel temperature-actuated seal for geothermal applications is under development. This program uses the shape memory property of nickel-titanium (Nitinol) alloys to achieve an improved seal in geothermal downhole pumps. Nitinol flange face seals and pump shaft seals have been designed, fabricated, and tested. It has been demonstrated that the shape memory effect of Nitinol alloys can be utilized to activate and maintain a leaktight seal in geothermal environments.

  4. Experimental rotordynamic coefficient results for: (a) a labyrinth seal with and without shunt injection and (b) a honeycomb seal 

    E-Print Network [OSTI]

    Soto Azuaje, Elias Antonio

    1997-01-01

    Centrifugal compressors are increasingly required to operate in higher pressure, higher speed, and large fluid density. In these conditions, compressors are susceptible to rotordynamic instabilities. To avoid this situation, labyrinth seals have...

  5. (ENFORCEMENT AGENCY CAN CUSTOMIZE WITH LETTERHEAD/SEAL)

    E-Print Network [OSTI]

    INCLUDE: 1. Heating equipment must have a minimum 78% AFUE (Exception: Wall & floor furnaces; room heaters). 2. Central air conditioners & heat pumps less than 65,000 Btu/hr must have a minimum 13 SEER. 3 Conditioned Floor Area Duct insulation requirement Thermostat Packaged Unit Furnace Indoor Coil Condensing

  6. Pressure Losses in 12”, 15” and 16” Non-Metallic Flexible Ducts with Compression and Sag (RP-1333) 

    E-Print Network [OSTI]

    Culp, C.H.; Cantrill, D.

    2009-01-01

    is based on findings resulting from ASHRAE Research Project RP-1333. ABSTRACT A study was conducted to measure air pressure loss in non- metallic flexible ducts and included 12” (305 mm), 14” (356 mm) and 16” (406 mm) diameter ducts on a flat surface... and also positioned over joists on 24” (610 mm) centers. For this study, flexible duct compression configurations were fully stretched and 4%, 15%, 30% and 45% compressed. Measure- ments were performed at each compression. All tests were performed...

  7. Basing Cryptographic Protocols on Tamper-Evident Seals In this paper we attempt to formally study two very intuitive physical models: sealed envelopes and

    E-Print Network [OSTI]

    Naor, Moni

    Basing Cryptographic Protocols on Tamper-Evident Seals Tal Moran Moni Naor Abstract In this paper are called "tamper-evident seals". Another physical object with this property is the "scratch-off card", often used in lottery tickets. We consider three variations of tamper-evident seals, and show that under

  8. Duct Thermal Performance Models for Large Commercial Buildings

    E-Print Network [OSTI]

    Secretary for Energy Efficiency and Renewable Energy, Building Technologies Program, of the U.S. Department in the Building Technologies Department were also helpful and supportive of this work, particularly regarding buildings, and the author is grateful for their input. Advice from Michaël Kummert of the Solar Energy

  9. Method for sealing an ultracapacitor, and related articles

    DOE Patents [OSTI]

    Day, James (Scotia, NY); Shapiro, Andrew Philip (Schenectady, NY); Jerabek, Elihu Calvin (Glenmont, NY)

    2000-08-29

    An improved process for sealing at least one ultracapacitor which includes a multi-layer structure is disclosed. The process includes the step of applying a substantial vacuum to press together an uppermost layer of the structure and a lowermost layer of the structure and to evacuate ambient gasses, wherein a sealant situated in a peripheral area between the facing surfaces of the layers forms a liquid-impermeable seal for the structure under the vacuum. In some embodiments, a press is used to apply pressure to the peripheral area on which the sealant is disposed. Usually, the ultracapacitor would be situated within an enclosable region of the press, and a collapsible membrane would be fastened over the ultracapacitor to fully enclose the region and transmit the vacuum force to the multi-layer structure. The force applied by the press itself causes the sealant to flow, thereby ensuring a complete seal upon curing of the sealant. This process can be employed to seal one ultracapacitor or a stack of at least two ultracapacitors. Another embodiment of this invention is directed to an apparatus for sealing a multi-layer ultracapacitor, comprising the elements described above.

  10. Sealed-bladdered chemical processing method and apparatus

    DOE Patents [OSTI]

    Harless, D. Phillip (Knoxville, TN)

    1999-01-01

    A method and apparatus which enables a complete multi-stepped chemical treatment process to occur within a single, sealed-bladdered vessel 31. The entire chemical process occurs without interruption of the sealed-bladdered vessel 31 such as opening the sealed-bladdered vessel 31 between various steps of the process. The sealed-bladdered vessel 31 is loaded with a batch to be dissolved, treated, decanted, rinsed and/or dried. A pressure filtration step may also occur. The self-contained chemical processing apparatus 32 contains a sealed-bladder 32, a fluid pump 34, a reservoir 20, a compressed gas inlet, a vacuum pump 24, and a cold trap 23 as well as the associated piping 33, numerous valves 21,22,25,26,29,30,35,36 and other controls associated with such an apparatus. The claimed invention allows for dissolution and/or chemical treatment without the operator of the self-contained chemical processing apparatus 38 coming into contact with any of the process materials.

  11. An experimental and theoretical comparison of rotordynamic coefficients for sawtooth-pattern damper seals 

    E-Print Network [OSTI]

    Nolan, Steven Anthony

    1987-01-01

    Interstage and neck' r ing seals for a centrifugal Page pump 2 Round-hole-pattern damper seal 3 Sawtooth-pattern damper seal cross section 4 High Reynolds number test section. 5 Schematic for sawtooth pattern stators 1 through 4 . . 13 6 Schematic.... The two types of pump seals which have potential for developing significant rotor forces are illustrated in Fig. 1. The necks or wear- r ing seals reduce the back leakage flow along the front surface of the impeller. The interstage seals reduce...

  12. Characterization of Pipes, Drain Lines, and Ducts using the Pipe...

    Office of Scientific and Technical Information (OSTI)

    application of the technology. Prior uses of the system are also discussed along with the cost savings that were realized from those uses. An assessment of the status and...

  13. Supercement for Annular Seal and Long-Term Integrity in Deep, Hot Wells "DeepTrek"

    SciTech Connect (OSTI)

    CSI Technologies

    2007-08-31

    The purpose of this project is to formulate a 'Supercement' designed for improving the long-term sealing integrity in HPHT wells. Phase I concentrated on chemistry studies and screening tests to design and evaluate Portland-based, hybrid Portland, and non-Portland-based cement systems suitable for further scale-up testing. Phase II work concentrated on additional lab and field testing to reduce the candidate materials list to two systems, as well as scaleup activities aimed at verifying performance at the field scale. Phase II was extended thorough a proposal to develop additional testing capabilities aimed at quantifying cementing material properties and performance that were previously not possible. Phase III focused on bringing the material(s) developed in previous Phases to commercialization, through Field Trials, Cost/Benefit Analysis, and Technology Transfer. Extensive development and testing work throughout the project led to Phase III commercialization of two very different materials: (1) Highly-expansive cement (Portland-based), patent pending as 'PRESTRESSED CEMENT'; and (2) Epoxy Resin (non-Portland-based), patent pending. Trade name is Ultra Seal-R. In Phase III, work concentrated on application of the Supercement materials in various increasingly-challenging wells. Previous testing revealed that PRESTRESSED CEMENT, when applied in weak or unconsolidated formations, tends to expand away from the central pipe, restricting the applicability of this material to competent formations. Tests were devised to quantify this effect so the material could be applied in appropriate wells. Additionally, the testing was needed because of industry resistance to expansive cements, due to previous marketing attempts with other materials that were less than successful. Field trials with the Epoxy Resin currently numbers in the hundreds of jobs at up to 295 deg F, with a large percentage being completely successful. Both the PRESTRESSED CEMENT as well as the Ultra Seal-R represent materials fulfilling the objectives of the DeepTrek project.

  14. An Industry Approach to Sealed Source Management at the End of Useful Life

    SciTech Connect (OSTI)

    Malkoske, G.; Gray, P.; Fasten, W.

    2008-07-01

    Radioactive sources provide significant benefits which enhance the general welfare of mankind. These beneficial applications include medical treatment, sterilization of single use medical devices, food safety and agriculture, as well as industrial safety and exploration. The radioisotope sector is broad, diverse, and well established, with a culture of safety and security. ISSPA's mission is to ensure that the beneficial use of radioactive sources continues to be regarded by the public, the media, legislators, and regulators as a safe, secure, viable technology for medical, industrial, and research applications. A key consideration of a vibrant safety and security culture is the comprehensive life cycle management of radioactive sources which ensures effective control throughout their life span. Closely linked to this is the commitment by responsible suppliers to take back radioactive sources at the end of their useful life. This is an essential obligation of ISSPA members, as stated in the framework for the ISSPA Code of Good Practice. This presentation will discuss the above topics and will provide some examples which demonstrate how ISSPA members have effectively managed sources at the end of their useful life. In conclusion: Sealed radioactive sources play a major and very important role in global industry and health. Their applications are varied and they are produced and shipped in the thousands each year around the world. The importance of an effective life cycle management is imperative to the safety and security of these sources. A multi-faceted approach to sealed source life cycle management between manufacturers/distributors, shippers, customers/users, and those involved in disposition of disused sources is critical. The IAEA Code of Conduct, from a regulatory perspective, and the ISSPA Code of Good Practice, from an industry perspective, will help to ensure that sealed sources are able to be effectively utilized to the benefit of mankind for generations to come. (authors)

  15. Gas-path leakage seal for a turbine

    DOE Patents [OSTI]

    Bagepalli, B.S.; Aksit, M.F.; Farrell, T.R.

    1999-08-10

    A gas-path leakage seal for generally sealing a gas-path leakage-gap between spaced-apart first and second members of a turbine (such as combustor casing segments of a gas turbine). The seal includes a flexible and generally imperforate metal sheet assemblage having opposing first and second surfaces and two opposing raised edges extending a generally identical distance above and below the surfaces. A first cloth layer assemblage has a thickness generally equal to the previously-defined identical distance and is superimposed on the first surface between the raised edges. A second cloth layer assemblage is generally identical to the first cloth layer assemblage and is superimposed on the second surface between the raised edges. 5 figs.

  16. Sealed symmetric multilayered microelectronic device package with integral windows

    DOE Patents [OSTI]

    Peterson, Kenneth A. (Albuquerque, NM); Watson, Robert D. (Tijeras, NM)

    2002-01-01

    A sealed symmetric multilayered package with integral windows for housing one or more microelectronic devices. The devices can be a semiconductor chip, a CCD chip, a CMOS chip, a VCSEL chip, a laser diode, a MEMS device, or a IMEMS device. The multilayered package can be formed of a low-temperature cofired ceramic (LTCC) or high-temperature cofired ceramic (HTCC) multilayer processes with the windows being simultaneously joined (e.g. cofired) to the package body during LTCC or HTCC processing. The microelectronic devices can be flip-chip bonded and oriented so that the light-sensitive sides are optically accessible through the windows. The result is a compact, low-profile, sealed symmetric package, having integral windows that can be hermetically-sealed.

  17. High temperature seal for joining ceramics and metal alloys

    DOE Patents [OSTI]

    Maiya, P. Subraya (Darien, IL); Picciolo, John J. (Lockport, IL); Emerson, James E. (Plainfield, IL); Dusek, Joseph T. (Lombard, IL); Balachandran, Uthamalingam (Hinsdale, IL)

    1998-01-01

    For a combination of a membrane of SrFeCo.sub.0.5 O.sub.x and an Inconel alloy, a high-temperature seal is formed between the membrane and the alloy. The seal is interposed between the alloy and the membrane, and is a fritted compound of Sr oxide and boric oxide and a fritted compound of Sr, Fe and Co oxides. The fritted compound of SrFeCo.sub.0.50 O.sub.x is present in the range of from about 30 to 70 percent by weight of the total sealant material and the fritted compound of Sr oxide and boric oxide has a mole ratio of 2 moles of the Sr oxide for each mole of boric oxide. A method of sealing a ceramic to an Inconel metal alloy is also disclosed.

  18. Technology Solutions Case Study: High-Performance Ducts in Hot-Dry Climates

    Office of Scientific and Technical Information (OSTI)

    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 Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefield Municipal GasAdministrationTechnicalTechnical InformationFrequentlyEnergy,|

  19. Technology Solutions Case Study: High-Performance Ducts in Hot-Dry Climates

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power AdministrationRobust,Field-effectWorking With U.S. CoalMexico IndependentMatter andPagesKeyDepartment() |

  20. Building America Technology Solutions for New and Existing Homes: Duct in

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative FuelsofProgram:Y-12Power, IncBioPredicting Envelope LeakageClimate