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Note: This page contains sample records for the topic "valve regulated lead" from the National Library of EnergyBeta (NLEBeta).
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We encourage you to perform a real-time search of NLEBeta
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1

Thermal runaway of valve-regulated lead-acid batteries  

Science Journals Connector (OSTI)

Valve-regulated lead-acid (VRLA) batteries that have aged on a float charge at constant voltage occasionally suffer from thermal runaway. Operating conditions for a VRLA battery have been simulated by changing th...

Junmei Hu; Yonglang Guo; Xuechou Zhou

2006-10-01T23:59:59.000Z

2

DOE-SPEC-3019-96; Valve-Regulated Type Lead-Acid Storage Batteries  

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

9-96 9-96 August 1996 DOE SPECIFICATION VALVE-REGULATED TYPE LEAD-ACID STORAGE BATTERIES U.S. Department of Energy FSC 6140 Washington, D.C. 20585 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. This document has been reproduced directly from the best available copy. Available to DOE and DOE contractors from the Office of Scientific and Technical Information, P.O. Box 62, Oak Ridge, TN 37831; (423) 576-8401. Available to the public from the U.S. Department of Commerce, Technology Administration, National Technical Information Service, Springfield, VA 22161; (703) 487-4650. Order No. DE96009470 DOE-SPEC-3019-96 THIS PAGE INTENTIONALLY LEFT BLANK DOE-SPEC-3019-96 iii FOREWORD 1. Use of this purchase specification is not mandatory. User should review the document and

3

Self-regulating valve  

DOE Patents [OSTI]

A variable, self-regulating valve having a hydraulic loss coefficient proportional to a positive exponential power of the flow rate. The device includes two objects in a flow channel and structure which assures that the distance between the two objects is an increasing function of the flow rate. The range of spacing between the objects is such that the hydraulic resistance of the valve is an increasing function of the distance between the two objects so that the desired hydraulic loss coefficient as a function of flow rate is obtained without variation in the flow area.

Humphreys, D.A.

1982-07-20T23:59:59.000Z

4

Valve  

DOE Patents [OSTI]

A positive acting valve suitable for operation in a corrosive environment is provided. The valve includes a hollow valve body defining an open-ended bore for receiving two, axially aligned, spaced-apart, cylindrical inserts. One insert, designated the seat insert, terminates inside the valve body in an annular face which lies within plane normal to the axis of the two inserts. An elastomeric O-ring seal is disposed in a groove extending about the annular face. The other insert, designated the wedge insert, terminates inside the valve body in at least two surfaces oppositely inclined with respect to each other and with respect to a plane normal to the axis of the two inserts. An elongated reciprocable gate, movable between the two inserts along a path normal to the axis of the two inserts, has a first flat face portion disposed adjacent and parallel to the annular face of the seat insert. The gate has a second face portion opposite to the first face portion provided with at least two oppositely inclined surfaces for mating with respective inclined surfaces of the wedge insert. An opening is provided through the gate which registers with a flow passage through the two inserts when the valve is open. Interaction of the respective inclined surfaces of the gate and wedge insert act to force the first flat face portion of the gate against the O-ring seal in the seat insert at the limits of gate displacement where it reaches its respective fully open and fully closed positions.

Cho, Nakwon (Knoxville, TN)

1980-01-01T23:59:59.000Z

5

Nonlinear springs with applications to flow regulation valves and mechanisms  

E-Print Network [OSTI]

This thesis focuses on the application of nonlinear springs for fluid flow control valves where geometric constraints, or fabrication technologies, limit the use of available solutions. Types of existing nonlinear springs ...

Freeman, David Calvin

2008-01-01T23:59:59.000Z

6

Safety valve  

DOE Patents [OSTI]

The safety valve contains a resilient gland to be held between a valve seat and a valve member and is secured to the valve member by a sleeve surrounding the end of the valve member adjacent to the valve seat. The sleeve is movable relative to the valve member through a limited axial distance and a gap exists between said valve member and said sleeve.

Bergman, Ulf C. (Malmoe, SE)

1984-01-01T23:59:59.000Z

7

Maryland stalemate leads Governor to propose partial re-regulation  

SciTech Connect (OSTI)

The governor said, 'Deregulation has failed us.' Retail prices were expected to decline but have in fact increased. He added, 'We will re-regulate Maryland's electricity supply going forward.' The state should make decisions concerning construction of new power plants as determined by the Public Service Commission.

NONE

2009-05-15T23:59:59.000Z

8

Check valve  

DOE Patents [OSTI]

A check valve for use in a GDCS of a nuclear reactor and having a motor driven disk including a rotatable armature for rotating the check valve disk over its entire range of motion is described. In one embodiment, the check valve includes a valve body having a coolant flow channel extending therethrough. The coolant flow channel includes an inlet end and an outlet end. A valve body seat is located on an inner surface of the valve body. The check valve further includes a disk assembly, sometimes referred to as the motor driven disc, having a counterweight and a disk shaped valve. The disk valve includes a disk base having a seat for seating with the valve body seat. The disk assembly further includes a first hinge pin member which extends at least partially through the disk assembly and is engaged to the disk. The disk valve is rotatable relative to the first hinge pin member. The check valve also includes a motor having a stator frame with a stator bore therein. An armature is rotatably positioned within the stator bore and the armature is coupled to the disk valve to cause the disk valve to rotate about its full range of motion. 5 figs.

Upton, H.A.; Garcia, P.

1999-08-24T23:59:59.000Z

9

Check valve  

DOE Patents [OSTI]

A check valve for use in a GDCS of a nuclear reactor and having a motor driven disk including a rotatable armature for rotating the check valve disk over its entire range of motion is described. In one embodiment, the check valve includes a valve body having a coolant flow channel extending therethrough. The coolant flow channel includes an inlet end and an outlet end. A valve body seat is located on an inner surface of the valve body. The check valve further includes a disk assembly, sometimes referred to as the motor driven disc, having a counterweight and a disk shaped valve. The disk valve includes a disk base having a seat for seating with the valve body seat. The disk assembly further includes a first hinge pin member which extends at least partially through the disk assembly and is engaged to the disk. The disk valve is rotatable relative to the first hinge pin member. The check valve also includes a motor having a stator frame with a stator bore therein. An armature is rotatably positioned within the stator bore and the armature is coupled to the disk valve to cause the disk valve to rotate about its full range of motion.

Upton, Hubert Allen (Morgan Hill, CA); Garcia, Pablo (Stanford, CA)

1999-08-24T23:59:59.000Z

10

Biodiversity Regulation of Ecosystem Services Coordinating Lead Authors: Sandra Diaz, David Tilman, Joseph Fargione  

E-Print Network [OSTI]

.3.5 Biodiversity Effects on Human Disease Regulation 11.4 Biodiversity Effects on the Provision of Marine Ecosystem.4.1 Invasion Resistance 11.4.2 Direct and Indirect Interactions between Marine Species 11.4.3 BiodiversityChapter 11 Biodiversity Regulation of Ecosystem Services Coordinating Lead Authors: Sandra Di

Minnesota, University of

11

Fast valve  

DOE Patents [OSTI]

A fast valve is disclosed that can close on the order of 7 milliseconds. It is closed by the force of a compressed air spring with the moving parts of the valve designed to be of very light weight and the valve gate being of wedge shaped with O-ring sealed faces to provide sealing contact without metal to metal contact. The combination of the O-ring seal and an air cushion create a soft final movement of the valve closure to prevent the fast air acting valve from having a harsh closing. 4 figs.

Van Dyke, W.J.

1992-04-07T23:59:59.000Z

12

Fast valve  

DOE Patents [OSTI]

A fast valve is disclosed that can close on the order of 7 milliseconds. It is closed by the force of a compressed air spring with the moving parts of the valve designed to be of very light weight and the valve gate being of wedge shaped with O-ring sealed faces to provide sealing contact without metal to metal contact. The combination of the O-ring seal and an air cushion create a soft final movement of the valve closure to prevent the fast air acting valve from having a harsh closing.

Van Dyke, William J. (Grafton, VA)

1992-01-01T23:59:59.000Z

13

Depressurization valve  

DOE Patents [OSTI]

A depressurization valve for use in relieving completely the pressure in a simplified boiling water reactor is disclosed. The normally closed and sealed valve is provided with a valve body defining a conduit from an outlet of a manifold from the reactor through a valve seat. A closing valve disk is configured for fitting to the valve seat to normally close the valve. The seat below the disk is provided with a radially extending annulus extending a short distance into the aperture defined by the seat. The disk is correspondingly provided with a longitudinally extending annulus that extends downwardly through the aperture defined by the seat towards the high pressure side of the valve body. A ring shaped membrane is endlessly welded to the seat annulus and to the disk annulus. The membrane is conformed over the confronted surface of the seat and disk in a C-sectioned configuration to seal the depressurization valve against the possibility of weeping. The disk is held to the closed position by an elongate stem extending away from the high pressure side of the valve body. The stem has a flange configured integrally to the stem for bias by two springs. The first spring acts from a portion of the housing overlying the disk on the stem flange adjacent the disk. This spring urges the stem and attached disk away from the seat and thus will cause the valve to open at any pressure. A second spring-preferably of the Belleville variety-acts on a latch plate surrounding and freely moving relative to the end of the stem. This second spring overcomes the bias of the first spring and any pressure acting upon the disk. This Belleville spring maintains through its spring force the valve in the closed position. At the same time, the latch plate with its freedom of movement relative to the stem allows the stem to thermally expand during valve temperature excursion.

Skoda, G.I.

1989-03-28T23:59:59.000Z

14

Can Mold Contamination of Homes Be Regulated? Lessons Learned from Radon and Lead Policies  

Science Journals Connector (OSTI)

We recommend policy approaches for controlling mold in homes that rely on home marketing incentives, building and housing codes, and maintenance and rehabilitation regulations, as well as public education initiatives. ... Lead exposure in homes depends primarily on when the home was built. ... While it is not yet feasible to develop standards and regulations for acceptable mold levels in the home, guidelines and policies can be developed at the federal, state, and local levels to disclose information regarding moisture and mold in homes for real-estate transactions. ...

Felicia Wu; Tom Biksey; Meryl H. Karol

2007-06-12T23:59:59.000Z

15

Are subsurface safety valves needed in deepwater?  

SciTech Connect (OSTI)

The object of this study was to evaluate SCSSV reliability and identify a preferred configuration for subsea completions in deepwater. A system design consisting of subsea, conventional, dual-bore tree, cluster wells was selected for evaluation. The study examined inherent risks associated with six tubing retrievable SCSSV configurations. Risks were evaluated for personnel and environmental safety, and operational and financial impact of: No SCSSV; Single SCSSV; Dual operating system single SCSSV; Tandem hot/hot (both valves active) SCSSVs without lockout features; Tandem hot/hot SCSSVs with lockout features; Tandem hot/cold (one valve active, the other dormant in open position) SCSSVs with lockout features. A ``fault tree`` identifying events that could lead to deleterious incidents was used to evaluate risks. Costs and consequences associated with potential events were determined using existing industry data, and resulting calculated risks were evaluated. Recommendations were developed and compared to current regulations, and potential regulatory conflicts were identified.

Verret, A.; Hey, C.

1995-11-01T23:59:59.000Z

16

Lead  

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

topic topic Lead 8:00 AM 8:15 AM Welcome and Webinar Rules Maloy 8:15 AM 8:30 AM NE Materials Introduction Lesica 8:30 AM 9:00 AM Advanced Reactor Concepts Sham 9:00 AM 9:30 AM SMR Corwin 9:30 AM 10:00 AM VHTR Materials Wright 10:00 AM 10:15 AM Coffee Break 10:15 AM 10:45 AM Fuel Cycle Research and Development Maloy 10:45 AM 11:15 AM LWR Sustainability Busby 11:15 AM 11:45 AM Summary/Discussion All Discussion topic - Development of Advanced ODS alloys Lead 8:00 AM 8:15 AM Welcome and Webinar Rules Maloy 8:15 AM 8:30 AM Advanced Materials for Fast Reactor Core Materials Maloy 8:30 AM 9:00 AM High Dose MA-957 testing Toloczko 9:00 AM 9:30 AM FCRD ODS Material Development- FCRD-NFA1 Hoelzer 9:30 AM 10:00 AM NFA Processing Odette 10:00 AM 10:15 AM Coffee Break 10:15 AM 10:45 AM 9Cr ODS Material Development Byun 10:45 AM

17

Nuclear radiation actuated valve  

DOE Patents [OSTI]

A nuclear radiation actuated valve for a nuclear reactor. The valve has a valve first part (such as a valve rod with piston) and a valve second part (such as a valve tube surrounding the valve rod, with the valve tube having side slots surrounding the piston). Both valve parts have known nuclear radiation swelling characteristics. The valve's first part is positioned to receive nuclear radiation from the nuclear reactor's fuel region. The valve's second part is positioned so that its nuclear radiation induced swelling is different from that of the valve's first part. The valve's second part also is positioned so that the valve's first and second parts create a valve orifice which changes in size due to the different nuclear radiation caused swelling of the valve's first part compared to the valve's second part. The valve may be used in a nuclear reactor's core coolant system.

Christiansen, David W. (Kennewick, WA); Schively, Dixon P. (Richland, WA)

1985-01-01T23:59:59.000Z

18

Mutations in Global Regulators Lead to Metabolic Selection during Adaptation to Complex Environments  

SciTech Connect (OSTI)

Adaptation to ecologically complex environments can provide insights into the evolutionary dynamics and functional constraints encountered by organisms during natural selection. Unlike adaptation to a single limiting resource, adaptation to a new environment with abundant and varied resources can be difficult to achieve by small incremental changes since many mutations are required to achieve even modest gains in fitness. Since changing complex environments are quite common in nature, we investigated how such an epistatic bottleneck can be avoided to allow rapid adaptation. We show that adaptive mutations arise repeatedly in independently evolved populations in the context of greatly increased genetic and phenotypic diversity. We go on to show that weak selection requiring substantial metabolic reprogramming can be readily achieved by mutations in the global response regulator arcA and the stress response regulator rpoS. We identified 46 unique single-nucleotide variants of arcA and 18 mutations in rpoS, nine of which resulted in stop codons or large deletions, suggesting that a subtle modulation of ArcA function and knockouts of rpoS are largely responsible for the metabolic shifts leading to adaptation. These mutations allow a higher order “metabolic selection” that eliminates epistatic bottlenecks, which could occur when many changes would be required. Proteomic and carbohydrate analysis of adapting E. coli populations revealed an up-regulation of enzymes associated with the TCA cycle and amino acid metabolism and an increase in the secretion of putrescine. The overall effect of adaptation across populations is to redirect and efficiently utilize uptake and catabolism of abundant amino acids. Concomitantly, there is a pronounced spread of more ecologically limited strains that results from specialization through metabolic erosion. Remarkably, the global regulators arcA and rpoS can provide a “one-step” mechanism of adaptation to a novel environment, which highlights the importance of global resource management as a powerful strategy to adaptation.

Saxer, Gerda; Krepps, Michael D.; Merkley, Eric D.; Ansong, Charles; Kaiser, Brooke LD; Valovska, Marie-Thrse; Ristic, Nikola; Yeh, Ping T.; Prakash, Vittal; Leiser, Owen P.; Nakhleh, Luay; Gibbons, Henry S.; Kreuzer, Helen W.; Shamoo, Yousif

2014-12-11T23:59:59.000Z

19

Annular flow control safety valve  

SciTech Connect (OSTI)

A tubular housing having an inner tubular member forms an inner passageway inside of the inner member and an outer passageway between the inner member and the housing. The housing has valve openings leading from the outer passageway to the exterior of the housing and a tubular valve closure member telescopically moves on the interior of the housing. First means move the valve closure member in an upper direction for closing the openings and at least one actuating piston is telescopically movable within and has its longitudinal axis in the wall of the housing and engages the valve closure member. The piston is in communication with a hydraulic passageway adapted to extend to the well surface for actuating the closure member in a direction to open the valve openings. The closure member is positioned whereby upward flow through the outer passageway acts on the closure member to close the valve opening. At least one lockout piston telescopically moves within the housing and is actuated from the surface and is engageable with holding means in the housing for providing a hydraulic lockout for the valve. Shear means may be provided between the lockout piston and the housing for controlling the hydraulic lockout. A single seal is provided between the closure member and the housing and is positioned below the opening and exposed to the pressure on both sides when the valve is opened. Preferably the actuating pistons are connected to the valve closure member but the hydraulic lockout pistons engage but are unconnected to the valve closure member.

Black, P.W.; Pringle, R.E.

1981-06-16T23:59:59.000Z

20

Sizing sliding gate valves for steam service  

SciTech Connect (OSTI)

Sliding gate valves have been used in thousands of applications during the past 40 yr. While steam control is a common application for these valves, thy are also used to control other gases and liquids. The sliding gate design provides straight-through flow, which minimizes turbulence, vibration, and noise. Seats are self-cleaning and self-lapping to provide a tight, long-lasting shutoff. A correctly sized valve is essential for accurate control. Valve size should be determined by service and system requirements, not by the size of the existing pipeline. Sizing a valve on the basis of pipeline size usually results in an oversized valve and poor control. Generally, regulator size is smaller than pipe size. Whenever complete information is known (inlet pressure, outlet pressure, or pressure drop, and required flow), determine the valve flow coefficient (C{sub v}) using the equations in ANSI/ISA S75.01 or a flow sizing chart. Tables of values for various types of valves are available from manufacturers. However, when complete system requirements are not known, valve oversizing is prevented by determining the design capacity of piping downstream from the valve. The valve should not be sized to pass more flow than the maximum amount the pipe can handle at a reasonable velocity. An example calculation is given.

Bollinger, R. [Jordan Value, Cincinnati, OH (United States)

1995-11-06T23:59:59.000Z

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


21

Design for Control System of Wastegate Valve Actuator in Turbocharger  

Science Journals Connector (OSTI)

This paper has designed a set of control system of waste gate valve actuator in turbocharger, it enables the waste gate valve regulate the exhaust flow before turbo automatically according to the operating condition of engine, so it can lower the pressure ... Keywords: wastegate valve, electronic control, design, test

Liu Xinghua; Yu Lei; Liu Fushui; Wu Wenfeng; Wang Ruwei

2010-12-01T23:59:59.000Z

22

Artificial Heart Valve Design  

E-Print Network [OSTI]

Artificial Heart Valve Design Your Chance to be a Biomedical Engineer #12;Circulatory System Video #12;What is a Heart Valve? · Heart Valve Video #12;#12;What Does a Heart Valve Do? · Maintain the one direction flow of blood through the heart · Heart valves allow blood to flow through in a forward direction

Provancher, William

23

Remote actuated valve implant  

SciTech Connect (OSTI)

Valve implant systems positionable within a flow passage, the systems having an inlet, an outlet, and a remotely activatable valve between the inlet and outlet, with the valves being operable to provide intermittent occlusion of the flow path. A remote field is applied to provide thermal or magnetic activation of the valves.

McKnight, Timothy E; Johnson, Anthony; Moise, Jr., Kenneth J; Ericson, Milton Nance; Baba, Justin S; Wilgen, John B; Evans, III, Boyd McCutchen

2014-02-25T23:59:59.000Z

24

Bellows sealed plug valve  

DOE Patents [OSTI]

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.

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

1990-01-01T23:59:59.000Z

25

Valves: Corrosion and maintenance  

SciTech Connect (OSTI)

A mill setting is without doubt a harsh, demanding environment for valves. In a polling of valve suppliers, several areas were identified as the most corrosive to valves, particularly chemical pulping, bleaching, chemical recovery, and waste-water treatment. In some uses, a valve may only last 12-18 months. Depending on the alloy and seat material used, the life expectancy can also exceed 10 years in some applications. This survey of valve manufacturers gives basic tips on selecting, protecting, and maintaining valves.

Meadows, D.G.

1993-08-01T23:59:59.000Z

26

Overflow control valve  

DOE Patents [OSTI]

An overflow control valve for use in a liquid sodium coolant pump tank which valve can be extended to create a seal with the pump tank wall or retracted to break the seal thereby accommodating valve removal. An actuating shaft which controls valve disc position also has cams which bear on roller surfaces to force retraction of a sliding cylinder against spring tension to retract the cylinder from sealing contact with the pump tank.

Hundal, Rolv (Hempfield, PA); Kessinger, Boyd A. (Murrysville, PA); Parlak, Edward A. (North Huntingdon, PA)

1984-07-24T23:59:59.000Z

27

Leading trends in environmental regulation that affect energy development. Final report  

SciTech Connect (OSTI)

Major environmental issues that are likely to affect the implementation of energy technologies between now and the year 2000 are identified and assessed. The energy technologies specifically addressed are: oil recovery and processing; gas recovery and processing; coal liquefaction; coal gasification (surface); in situ coal gasification; direct coal combustion; advanced power systems; magnetohydrodynamics; surface oil shale retorting; true and modified in situ oil shale retorting; geothermal energy; biomass energy conversion; and nuclear power (fission). Environmental analyses of these technologies included, in addition to the main processing steps, the complete fuel cycle from resource extraction to end use. A comprehensive survey of the environmental community (including environmental groups, researchers, and regulatory agencies) was carried out in parallel with an analysis of the technologies to identify important future environmental issues. Each of the final 20 issues selected by the project staff has the following common attributes: consensus of the environmental community that the issue is important; it is a likely candidate for future regulatory action; it deals with a major environmental aspect of energy development. The analyses of the 20 major issues address their environmental problem areas, current regulatory status, and the impact of future regulations. These analyses are followed by a quantitative assessment of the impact on energy costs and nationwide pollutant emissions of possible future regulations. This is accomplished by employing the Strategic Environmental Assessment System (SEAS) for a subset of the 20 major issues. The report concludes with a more general discussion of the impact of environmental regulatory action on energy development.

Steele, R V; Attaway, L D; Christerson, J A; Kikel, D A; Kuebler, J D; Lupatkin, B M; Liu, C S; Meyer, R; Peyton, T O; Sussin, M H

1980-01-01T23:59:59.000Z

28

American Valve: Proposed Penalty (2010-CW-1411) | Department of Energy  

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

American Valve: Proposed Penalty (2010-CW-1411) American Valve: Proposed Penalty (2010-CW-1411) American Valve: Proposed Penalty (2010-CW-1411) September 8, 2010 DOE alleged in a Notice of Proposed Civil Penalty that American Valve, Inc. failed to certify a variety of showerheads as compliant with the applicable water conservation standards. DOE regulations require a manufacturer (which includes importers) to submit reports certifying that its products have been tested and meet the applicable water conservation standards. This civil penalty notice advises the company of the potential penalties and DOE's administrative process, including the company's right to a hearing. American Valve: Proposed Penalty (2010-CW-1411) More Documents & Publications American Valve: Order (2010-CW-1411) Afeel: Proposed Penalty (2010-CW-07/1414)

29

Flow metering valve  

DOE Patents [OSTI]

An apparatus for metering fluids at high pressures of about 20,000 to 60,000 psi is disclosed. The apparatus includes first and second plates which are positioned adjacent each other to form a valve chamber. The plates are made of materials which have substantially equal elastic properties. One plate has a planar surface area, and the other a recessed surface area defined by periphery and central lips. When the two plates are positioned in adjacent contacting relationship, a valve chamber is formed between the planar surface area and the recessed surface area. Fluid is introduced into the chamber and exits therefrom when a deformation occurs at positions where they no longer form a valve seat. This permits the metering of fluids at high pressures and at slow variable rates. Fluid then exits from the chamber until an applied external force becomes large enough to bring the valve seats back into contact.

Blaedel, Kenneth L. (Dublin, CA)

1985-01-01T23:59:59.000Z

30

Flow metering valve  

DOE Patents [OSTI]

An apparatus for metering fluids at high pressures of about 20,000 to 60,000 psi is disclosed. The apparatus includes first and second plates which are positioned adjacent each other to form a valve chamber. The plates are made of materials which have substantially equal elastic properties. One plate has a planar surface area, and the other a recessed surface area defined by periphery and central lips. When the two plates are positioned in adjacent contacting relationship, a valve chamber is formed between the planar surface area and the recessed surface area. Fluid is introduced into the chamber and exits therefrom when a deformation occurs at positions where they no longer form a valve seat. This permits the metering of fluids at high pressures and at slow variable rates. Fluid then exits from the chamber until an applied external force becomes large enough to bring the valve seats back into contact.

Blaedel, K.L.

1983-11-03T23:59:59.000Z

31

Mud saver valve  

SciTech Connect (OSTI)

This patent describes a mud saver valve for retaining drilling fluid in the kelly of a rotary drilling rig. It comprises: a kelly sub defining an open-ended elongated body having threaded ends for forming a connection between the kelly and a drill pipe string; an enlarged bore formed in said elongated body; a tubular body received within said enlarged bore of said elongated body, said tubular body including an enlarged portion defining a shoulder for engagement with a shoulder formed in said elongated body; hollow piston means axially disposed within said tubular body. The piston means being axially movable relative to said tubular body and defining a fluid passage therethrough; valve means removably mounted within said tubular body. The valve means cooperating with said piston means to normally close the fluid passage through said piston means, wherein said valve means is movable between a first and second position; a stop member removably connected to said tubular body. The stop member including a first internal circumferential tapered shoulder for limiting downward movement of said valve means; and means for urging said piston means into engagement with said valve means.

Baugh, B.F.

1990-02-13T23:59:59.000Z

32

1. A tank of volume V is to be filled with an ideal gas. Initially the tank is at P1and T1.the port is regulated with a valve, and the port properties are constant at Tin.The tank is well  

E-Print Network [OSTI]

1. A tank of volume V is to be filled with an ideal gas. Initially the tank is at P1and T1.the port is regulated with a valve, and the port properties are constant at Tin.The tank is well insulated so the process is adiabatic. If the final pressure of the tank is Pz,determine the finaltemperature of the tank T

Huang, Haimei

33

Fast closing valve  

DOE Patents [OSTI]

A valve is provided for protecting the high vacuum of a particle accelera in the event of air leakage, wherein the valve provides an axially symmetrical passage to avoid disturbance of the partical beam during normal operation, and yet enables very rapid and tight closure of the beam-carrying pipe in the event of air leakage. The valve includes a ball member (30) which can rotate between a first position wherein a bore (32) in the member is aligned with the beam pipe, and a second position out of line with the pipe. A seal member (38) is flexibly sealed to the pipe, and has a seal end which can move tightly against the ball member after the bore has rotated out of line with the pipe, to thereby assure that the seal member does not retard rapid rotation of the ball valve member. The ball valve member can be rapidly rotated by a conductive arm (40) fixed to it and which is rotated by the discharge of a capacitor bank through coils (44, 45) located adjacent to the arm.

Hanson, Clark L. (Livermore, CA)

1984-01-10T23:59:59.000Z

34

The selection and maintenance of valves for the control of fugitive emissions  

SciTech Connect (OSTI)

The pulp and paper industry has long needed valves that (a) have extremely low stem leakage when they are new and (b) need little or no maintenance to retain that low leakage over their service life. The EPA fugitive emission regulations provide additional impetus for the pulp and paper industry to buy such valves and for the valve and packing industry to produce such valves. Even if particular operations are not covered by the fugitive emissions regulations, it is--and always has been--in a mill's best interest to have valves whose stems don't leak and need little or no maintenance to prevent that leakage. The paper gives some recommendations on how to meet that objective: selection the right packing materials; apply the right amount of stress to the packing; install the packing correctly; and use rotary valves where practical.

Dresch, C. (NIBCO Inc., Elkhart, IN (United States))

1994-08-01T23:59:59.000Z

35

Valve stem and packing assembly  

DOE Patents [OSTI]

A valve stem and packing assembly is provided in which a rotatable valve stem includes a first tractrix surface for sliding contact with a stem packing and also includes a second tractrix surface for sliding contact with a bonnet. Force is applied by means of a spring, gland flange, and gland on the stem packing so the stem packing seals to the valve stem and bonnet. This configuration serves to create and maintain a reliable seal between the stem packing and the valve stem. The bonnet includes a second complementary tractrix surface for contacting the second sliding tractrix surface, the combination serving as a journal bearing for the entire valve stem and packing assembly. The journal bearing so configured is known as a Schiele's pivot. The Schiele's pivot also serves to maintain proper alignment of the valve stem with respect to the bonnet. Vertical wear between the surfaces of the Schiele's pivot is uniform at all points of contact between the second sliding tractrix surface and the second complementary tractrix surface of a bonnet. The valve stem is connected to a valve plug by means of a slip joint. The valve is opened and closed by rotating the valve stem. The slip joint compensates for wear on the Schiele's pivot and on the valve plug. A ledge is provided on the valve bonnet for the retaining nut to bear against. The ledge prevents over tightening of the retaining nut and the resulting excessive friction between stem and stem packing. 2 figures.

Wordin, J.J.

1991-09-03T23:59:59.000Z

36

Valve stem and packing assembly  

DOE Patents [OSTI]

A valve stem and packing assembly is provided in which a rotatable valve stem includes a first tractrix surface for sliding contact with a stem packing and also includes a second tractrix surface for sliding contact with a bonnet. Force is applied by means of a spring, gland flange, and gland on the stem packing so the stem packing seals to the valve stem and bonnet. This configuration serves to create and maintain a reliable seal between the stem packing and the valve stem. The bonnet includes a second complementary tractrix surface for contacting the second sliding tractrix surface, the combination serving as a journal bearing for the entire valve stem and packing assembly. The journal bearing so configured is known as a Schiele's pivot. The Schiele's pivot also serves to maintain proper alignment of the valve stem with respect to the bonnet. Vertical wear between the surfaces of the Schiele's pivot is uniform at all points of contact between the second sliding tractrix surface and the second complementary tractrix surface of a bonnet. The valve stem is connected to a valve plug by means of a slip joint. The valve is opened and closed by rotating the valve stem. The slip joint compensates for wear on the Schiele's pivot and on the valve plug. A ledge is provided on the valve bonnet for the retaining nut to bear against. The ledge prevents overtightening of the retaining nut and the resulting excessive friction between stem and stem packing.

Wordin, John J. (Bingham County, ID)

1991-01-01T23:59:59.000Z

37

Valve for gas centrifuges  

DOE Patents [OSTI]

The invention is pneumatically operated valve assembly for simulatenously (1) closing gas-transfer lines connected to a gas centrifuge or the like and (2) establishing a recycle path between two on the lines so closed. The value assembly is especially designed to be compact, fast-acting, reliable, and comparatively inexpensive. It provides large reductions in capital costs for gas-centrifuge cascades.

Hahs, C.A.; Rurbage, C.H.

1982-03-17T23:59:59.000Z

38

Combustion engine with fuel injection system, and a spray valve for such an engine  

SciTech Connect (OSTI)

This paper describes a fuel system for a combustion engine have a cylinder with an air inlet passage. It comprises: a fuel spray valve having a fuel injection nozzle for spraying fuel into the cylinder air inlet passage and having a fuel spray valve passage leading to the nozzle, means for mounting the fuel spray valve to position the nozzle to open into the cylinder air inlet passage adjacent the cylinder, a fuel pump for providing fuel under pressure to the fuel spray valve passage to be sprayed from the fuel spray valve nozzle, and a fuel heating device connectable to an electrical power supply and disposed adjacent to the valve to be energized for heating the fuel to enhance finer spraying thereof by the fuel spray valve nozzle, the fuel heating device comprising means defining a spiral fuel flow path of selected length connected to and coaxial with the fuel spray valve passage to dispose the selected length of fuel flow path closely adjacent to the fuel spray valve passage, and a fuel heating element comprising a thermistor of a ceramic material of positive temperature coefficient of resistivity arranged to heat the selected length of the spiral fuel flow path to transfer heat to the fuel flowing in the spiral fuel flow path throughout the selected length of the spiral fuel flow path to substantially heat the fuel at a location closely adjacent to the fuel spray valve passage to enhance vaporizing of fuel being sprayed from the valve nozzle.

Wechem, G.V.; Beunk, G.; Van Den Elst, F.; Gerson, P.M.

1991-10-08T23:59:59.000Z

39

Fast-acting valve and uses thereof  

DOE Patents [OSTI]

A very fast acting valve capable of producing a very well-defined plug of gas suitable for filling a theta pinch vacuum vessel is given. The valve requires no springs, instead being stopped mainly by a nonlinear force. Thus, the valve is not subject to bouncing; and the ratio of the size of the valve housing to the size of the valve stem is smaller than it would be if springs were needed to stop the valve stem. Furthermore, the valve can be used for thousands of valve firings with no apparent valve damage.

Meyer, James A. (Espanola, NM)

1982-01-01T23:59:59.000Z

40

Fast-acting valve and uses thereof  

DOE Patents [OSTI]

A very fast acting valve capable of producing a very well-defined plug of gas suitable for filling a theta pinch vacuum vessel is given. The valve requires no springs, instead being stopped mainly by a nonlinear force. Thus, the valve is not subject to bouncing; and the ratio of the size of the valve housing to the size of the valve stem is smaller than it would be if springs were needed to stop the valve stem. Furthermore, the valve can be used for thousands of valve firings with no apparent valve damage.

Meyer, J.A.

1980-05-16T23:59:59.000Z

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


41

Semi-active compressor valve  

DOE Patents [OSTI]

A method and system for fine-tuning the motion of suction or discharge valves associated with cylinders of a reciprocating gas compressor, such as the large compressors used for natural gas transmission. The valve's primary driving force is conventional, but the valve also uses an electromagnetic coil to sense position of the plate (or other plugging element) and to provide an opposing force prior to impact.

Brun, Klaus (Helotes, TX); Gernentz, Ryan S. (San Antonio, TX)

2010-07-27T23:59:59.000Z

42

Internal combustion engine intake valve  

SciTech Connect (OSTI)

In a inlet valve for use in an internal combustion engine in which the valve has a stem and a head, the head having, when seated, a first side positioned within a combustion chamber of an engine block and a second, opposite, side attached to the stem, the second side including that piston of the head forming the seat with the engine block when the valve is in a seated position, and first side including that portion of the head from the seat toward the chamber when the valve is in the seated position, and the engine including means for moving the valve from the closed position to an open position to allow a fuel mixture to enter the chamber, the improvement in the valve comprising: an extension ridge from the first side, positioned in alignment with the periphery of the valve head, the ridge forming with the seat a single, continuous, smooth outer surface along the periphery thereof for reducing the coefficient of drag of the fuel entering the chamber around the valve head when the valve is in the open position.

Mosler, W.B.

1988-10-25T23:59:59.000Z

43

Redesigned recycle valves abate compressor vibration  

SciTech Connect (OSTI)

New recycle valves installed in 1994 on the compressors in the East Brae field in the North Sea corrected the noise and vibration problem that damaged the original valves shortly after commissioning the platform. The original recycle valves, especially on the second-stage compressors, showed severe damage. The paper describes the Brae field, the recycle system, recycle valves, operations, the new valve design, noise and vibration, and valve actuators.

Laing, D.E. [Marathon Oil U.K. Ltd., Aberdeen (United Kingdom); Miller, H.L.; McCaskill, J.W. [Engineering Control Components Inc., Rancho Santa Margarita, CA (United States)

1995-06-05T23:59:59.000Z

44

Surge-damping vacuum valve  

DOE Patents [OSTI]

A valve having a mechanism for damping out flow surges in a vacuum system which utilizes a slotted spring-loaded disk positioned adjacent the valve's vacuum port. Under flow surge conditions, the differential pressure forces the disk into sealing engagement with the vacuum port, thereby restricting the flow path to the slots in the disk damping out the flow surge.

Bullock, Jack C. (Pleasanton, CA); Kelly, Benjamin E. (Tracy, CA)

1980-01-01T23:59:59.000Z

45

Control valve for solar heating systems  

SciTech Connect (OSTI)

A control valve for a solar heating system is disclosed. The valve has a valve body which defines four chambers disposed end to end. A valve operating rod is movable axially through all four chambers under motor control and carries a valve member for directing liquid through the valve. In one position of the valve member, incoming liquid is directed to an outlet for connection to a solar collector and liquid returning from the collector can flow through the valve body and back to the swimming pool. In the other position of the valve member, the liquid bypasses the collector and is directed back to the pool while liquid in the collector drains back into the valve body through the outlet and is removed by suction from a drain-down chamber in the valve body.

Stewart, J.M.

1981-12-29T23:59:59.000Z

46

Cavitation guide for control valves  

SciTech Connect (OSTI)

This guide teaches the basic fundamentals of cavitation to provide the reader with an understanding of what causes cavitation, when it occurs, and the potential problems cavitation can cause to a valve and piping system. The document provides guidelines for understanding how to reduce the cavitation and/or select control valves for a cavitating system. The guide provides a method for predicting the cavitation intensity of control valves, and how the effect of cavitation on a system will vary with valve type, valve function, valve size, operating pressure, duration of operation and details of the piping installation. The guide defines six cavitation limits identifying cavitation intensities ranging from inception to the maximum intensity possible. The intensity of the cavitation at each limit Is described, including a brief discussion of how each level of cavitation influences the valve and system. Examples are included to demonstrate how to apply the method, including making both size and pressure scale effects corrections. Methods of controlling cavitation are discussed providing information on various techniques which can be used to design a new system or modify an existing one so it can operate at a desired level of cavitation.

Tullis, J.P. [Tullis Engineering Consultants, Logan, UT (United States)

1993-04-01T23:59:59.000Z

47

Valve for controlling solids flow  

DOE Patents [OSTI]

A fluidized solids control valve is disclosed that is particularly well adapted for use with a flow of coal or char that includes both large particles and fines. The particles may or may not be fluidized at various times during the operation. The valve includes a tubular body that terminates in a valve seat covered by a normally closed closure plate. The valve body at the seat and the closure plate is provided with aligned longitudinal slots that receive a pivotally supported key plate. The key plate is positionable by an operator in inserted, intermediate and retracted positions respecting the longitudinal slot in the valve body. The key plate normally closes the slot within the closure plate but is shaped and aligned obliquely to the longitudinal slot within the valve body to provide progressively increasing slot openings between the inserted and retracted positions. Transfer members are provided between the operator, key plate and closure plate to move the closure plate into an open position only when the key plate is retracted from the longitudinal slot within the valve body.

Feldman, David K. (Fairlawn, NJ)

1980-01-01T23:59:59.000Z

48

Steam Turbine Control Valve Noise  

Science Journals Connector (OSTI)

Although noise problems with steam turbine control valves have existed before they have become more prominent with nuclear turbines whose valves range to 20 in. in diameter. Our first?generation nuclear control valves were unacceptably noisy when operating under chocked conditions. These noise levels have been ameliorated by incorporation of a valve cage with numerous small holes. Rational design rules for this “dispersive muffler” have been developed from published multiple?jet noise data and improved through our own tests. However we are also evaluating other low?noise valve configurations which are consistent with turbine requirements. The approach we are developing is to investigate the internal aerodynamic noisegeneration in small air model tests and to combine this with measurements of pipe?wall transmission characteristics (being reported separately) to predict externally radiated noise. These predictions will be checked in a new steam test facility for complete scale?model valves. The small air tests show that acoustic efficiencies of throttling valve flows tend to vary with third power of Mach number when exhausting into space and with a lesser power when enclosed in a downstream pipe. At some pressure ratios narrow?band spikes appear in the spectrum and for some configurations step changes in sound power are associated with transitions in flow regimes.

Frank J. Heymann; Michael A. Staiano

1973-01-01T23:59:59.000Z

49

Heart valve tissue engineering Frank Baaijens  

E-Print Network [OSTI]

Heart valve tissue engineering Frank Baaijens Department of Biomedical Engineering Eindhoven University of Technology Netherlands Tissue engineered heart valves appear promising as autologous valvular functionality and durability of the heart valve relies on the strength and anisotropic properties of the valve

Stavroulakis, Georgios E.

50

Heart Valve Lesson Plan Biomedical Engineering  

E-Print Network [OSTI]

Heart Valve Lesson Plan Biomedical Engineering Objective · Introduce students to biomedical Learning Outcomes · Students will understand the role and function of heart valves. · Students will learn does a heart valve work? · Why do we need to replace heart valves? Time Required (Itemized) · Lecture

Provancher, William

51

July 24, 2009, Visiting Speakers Program Panel Discussion - Governance and Regulations: U. S. to Lead or Lag in the 21st Century - Companion Book  

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

Hosted by the Hosted by the U.S. Department of Energy Office of Health, Safety and Security and the National Academy of Public Administration July 24, 2009 Washington, DC Governance and Regulation: U.S. to Lead or Lag in the 21 st Century Visiting Speakers Program Event The National Academy of Public Administration is a non-profit, independent coalition of top public management and organizational leaders who tackle the nation's most critical and complex challenges. With a network of more than 600 distinguished Fellows and an experienced professional staff, the Academy is uniquely qualified and trusted across government to provide objective advice and practical solutions based on systematic research and expert analysis. Established in 1967 and chartered by Congress, the Academy continues to make a positive impact by helping federal,

52

Friction and Wear Reduction in Diesel Engine Valve Trains | Department...  

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

More Documents & Publications Mechanisms of Oxidation-Enhanced Wear in Diesel Exhaust Valves Materials for Advanced Engine Valve Train Materials for Advanced Engine Valve Train...

53

Development of Lashless Valve Train Technology | Department of...  

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

Lashless Valve Train Technology Development of Lashless Valve Train Technology This poster covers Jacobs history of lashless valve train efforts, design, simulation, engine...

54

Noninvasive valve monitor using alternating electromagnetic field  

DOE Patents [OSTI]

One or more electrical coils are carefully located on the outside of a valve body. An alternating current passing through the coil(s) results in an alternating electromagnetic field being transmitted into the valve body and valve internals. The electromagnetic field varies in intensity and polarity in the valve. As the position of a valve internal part is changed, the electromagnetic field throughout the valve body and its internals is altered. A passive receiver coil carefully located on the outside of the valve body detects the intensity of the electromagnetic field at that location as an induced electrical voltage in the coil. With the change in position of the valve internal part, there is a corresponding change in the induced voltage as a result of the alteration in the alternating electromagnetic field at that location. Changes in the voltage provide an indication of the position and motion of valve internals.

Eissenberg, David M. (Oak Ridge, TN); Haynes, Howard D. (Knoxville, TN); Casada, Donald A. (Knoxville, TN)

1993-01-01T23:59:59.000Z

55

Annular flow diverter valve  

DOE Patents [OSTI]

A valve for diverting flow from the center of two concentric tubes to the annulus between the tubes or, operating in the reverse direction, for mixing fluids from concentric tubes into a common tube and for controlling the volume ratio of said flow consists of a toroidal baffle disposed in sliding engagement with the interior of the inner tube downstream of a plurality of ports in the inner tube, a plurality of gates in sliding engagement with the interior of the inner tube attached to the baffle for movement therewith, a servomotor having a bullet-shaped plug on the downstream end thereof, and drive rods connecting the servomotor to the toroidal baffle, the servomotor thereby being adapted to move the baffle into mating engagement with the bullet-shaped plug and simultaneously move the gates away from the ports in the inner tube and to move the baffle away from the bullet-shaped plug and simultaneously move the gates to cover the ports in the inner tube.

Rider, Robert L. (Walkersville, MD)

1980-01-01T23:59:59.000Z

56

Rankine cycle condenser pressure control using an energy conversion device bypass valve  

DOE Patents [OSTI]

The disclosure provides a waste heat recovery system and method in which pressure in a Rankine cycle (RC) system of the WHR system is regulated by diverting working fluid from entering an inlet of an energy conversion device of the RC system. In the system, an inlet of a controllable bypass valve is fluidly coupled to a working fluid path upstream of an energy conversion device of the RC system, and an outlet of the bypass valve is fluidly coupled to the working fluid path upstream of the condenser of the RC system such that working fluid passing through the bypass valve bypasses the energy conversion device and increases the pressure in a condenser. A controller determines the temperature and pressure of the working fluid and controls the bypass valve to regulate pressure in the condenser.

Ernst, Timothy C; Nelson, Christopher R; Zigan, James A

2014-04-01T23:59:59.000Z

57

An electromechanical valve drive incorporating a nonlinear mechanical transformer  

E-Print Network [OSTI]

In traditional internal combustion engines, a camshaft acts on the valve stems to open and close the valves. Valve timing is fixed relative to piston position. On the other hand, if a valve is flexibly controlled by a ...

Chang, Woo Sok, 1964-

2003-01-01T23:59:59.000Z

58

Airpath Control of a SI Engine with Variable Valve Timing Actuators Thomas Leroy, Jonathan Chauvin and Nicolas Petit  

E-Print Network [OSTI]

Airpath Control of a SI Engine with Variable Valve Timing Actuators Thomas Leroy, Jonathan Chauvin with Variable Valve Timing (VVT) actuators. VVT devices are used to produce internal exhaust gas recirculation actuators affect the fresh air charge in the cylinders. This has an impact on the torque output (leading

59

Active combustion flow modulation valve  

DOE Patents [OSTI]

A flow modulation valve has a slidably translating hollow armature with at least one energizable coil wound around and fixably attached to the hollow armature. The energizable coil or coils are influenced by at least one permanent magnet surrounding the hollow armature and supported by an outer casing. Lorentz forces on the energizable coils which are translated to the hollow armature, increase or decrease the flow area to provide flow throttling action. The extent of hollow armature translation depends on the value of current supplied and the direction of translation depends on the direction of current flow. The compact nature of the flow modulation valve combined with the high forces afforded by the actuator design provide a flow modulation valve which is highly responsive to high-rate input control signals.

Hensel, John Peter; Black, Nathaniel; Thorton, Jimmy Dean; Vipperman, Jeffrey Stuart; Lambeth, David N; Clark, William W

2013-09-24T23:59:59.000Z

60

American Valve: Order (2010-CW-1411)  

Broader source: Energy.gov [DOE]

DOE ordered American Valve, Inc. to pay a $5,000 civil penalty after finding American Valve had failed to certify that certain showerhead models comply with the applicable water conservation standards.

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


61

Self Contained Temperature Actuated Control Valves  

E-Print Network [OSTI]

Ogontz Controls Company, P.O. Box 479, Willow Grove, Pennsylvania, 19090. FREEZ AND SCALD PROTECTION OUTDOOR EMERGENCY SHOWER = t' ",. 362 ESL-IE-79-04-39 Proceedings from the First Industrial Energy Technology Conference Houston, TX, April 22... control valves and surface temperature control valves (to provide setqp and freeze protection), fluid sensing control valves, air fluid sensing control valves, safety shower val~es (to provide both freeze and scald protection) and condensate freeze...

Pirkle, F.

1979-01-01T23:59:59.000Z

62

Lockout housing and sleeve for safety valve  

SciTech Connect (OSTI)

This patent describes apparatus for use in a subsurface valve. It comprises a lockout housing; and a lockout sleeve.

Dickson, R.L.; Davis, G.R.

1992-07-07T23:59:59.000Z

63

Fast-acting valve actuator  

DOE Patents [OSTI]

A fast-acting valve actuator utilizes a spring driven pneumatically loaded piston to drive a valve gate. Rapid exhaust of pressurized gas from the pneumatically loaded side of the piston facilitates an extremely rapid piston stroke. A flexible selector diaphragm opens and closes an exhaust port in response to pressure differentials created by energizing and de-energizing a solenoid which controls the pneumatic input to the actuator as well as selectively providing a venting action to one side of the selector diaphragm.

Cho, Nakwon (Knoxville, TN)

1980-01-01T23:59:59.000Z

64

CONTROL VALVE TESTING PROCEDURES AND EQUATIONS  

E-Print Network [OSTI]

APPENDIX A CONTROL VALVE TESTING PROCEDURES AND EQUATIONS FOR LIQUID FLOWS #12;APPENDIX A CONTROL VALVE TESTING PROCEDURES AND EQUATIONS FOR LIQUID FLOWS 2 Cv Q P Sg net gpm net = / Cv = Q P / Sg 75 in this report is per Instrument Society of America S39.2 testing specifications for control valves. The main

Rahmeyer, William J.

65

Dynamic Testing of Check Valves William Rahmeyer  

E-Print Network [OSTI]

Dynamic Testing of Check Valves William Rahmeyer Professor of Civil and Environmental Engineering;1 DYNAMIC FLOW TESTING OF CHECK VALVES by William Rahmeyer, Professor of Civil and Environmental Engineering objectives of this paper are: (1) to present a test method by which check valves can be dynamically tested

Rahmeyer, William J.

66

Valve for fuel pin loading system  

DOE Patents [OSTI]

A cyclone valve surrounds a wall opening through which cladding is projected. An axial valve inlet surrounds the cladding. Air is drawn through the inlet by a cyclone stream within the valve. An inflatable seal is included to physically engage a fuel pin subassembly during loading of fuel pellets.

Christiansen, D.W.

1984-01-01T23:59:59.000Z

67

Valve for fuel pin loading system  

DOE Patents [OSTI]

A cyclone valve surrounds a wall opening through which cladding is projected. An axial valve inlet surrounds the cladding. Air is drawn through the inlet by a cyclone stream within the valve. An inflatable seal is included to physically engage a fuel pin subassembly during loading of fuel pellets.

Christiansen, David W. (Kennewick, WA)

1985-01-01T23:59:59.000Z

68

Evaluation of silicon-nitride ceramic valves.  

SciTech Connect (OSTI)

Silicon-nitride ceramic valves can improve the performance of both light- and heavy-duty automotive engines because of the superior material properties of silicon nitrides over current metal alloys. However, ceramics are brittle materials that may introduce uncertainties in the reliability and durability of ceramic valves. As a result, the lifetime of ceramic valves are difficult to predict theoretically due to wide variations in the type and distribution of microstructural flaws in the material. Nondestructive evaluation (NDE) methods are therefore required to assess the quality and reliability of these valves. Because ceramic materials are optically translucent and the strength-limiting flaws are normally located near the valve surface, a laser-scatter method can be used for NDE evaluation of ceramic valves. This paper reviews the progress in the development of this NDE method and its application to inspect silicon-nitride ceramic valves at various stages of manufacturing and bench and engine tests.

Sun, J. G.; Zhang, J. M.; Andrews, M. J.; Tretheway, J. S.; Phillips, N. S .L.; Jensen, J. A.; Nuclear Engineering Division; Univ. of Texas; Caterpillar, Inc.

2008-01-01T23:59:59.000Z

69

Force measuring valve assemblies, systems including such valve assemblies and related methods  

DOE Patents [OSTI]

Methods of evaluating a fluid condition may include stroking a valve member and measuring a force acting on the valve member during the stroke. Methods of evaluating a fluid condition may include measuring a force acting on a valve member in the presence of fluid flow over a period of time and evaluating at least one of the frequency of changes in the measured force over the period of time and the magnitude of the changes in the measured force over the period of time to identify the presence of an anomaly in a fluid flow and, optionally, its estimated location. Methods of evaluating a valve condition may include directing a fluid flow through a valve while stroking a valve member, measuring a force acting on the valve member during the stroke, and comparing the measured force to a reference force. Valve assemblies and related systems are also disclosed.

DeWall, Kevin George (Pocatello, ID); Garcia, Humberto Enrique (Idaho Falls, ID); McKellar, Michael George (Idaho Falls, ID)

2012-04-17T23:59:59.000Z

70

Improved valve and dash-pot assembly  

DOE Patents [OSTI]

A dash-pot valve comprises a cylinder submerged in the fluid of a housing and have a piston attached to a plunger projecting into the path of closing movement of a pivotal valve member. A vortex chamber in said cylinder is provided with targentially directed inlets to generate vortex flow upon retraction of said plunger and effect increasing resistance against said piston to progressively retard the closing rate of said valve member toward its seat.

Chang, S.C.

1985-04-23T23:59:59.000Z

71

Advanced Lead Acid Battery Consortium | Open Energy Information  

Open Energy Info (EERE)

Lead Acid Battery Consortium Lead Acid Battery Consortium Jump to: navigation, search Name Advanced Lead-Acid Battery Consortium Place Durham, North Carolina Zip 27713 Sector Vehicles Product The ALABC is a research consortium of more than 50 battery-related companies that was originally formed in 1992 to advance the capabilities of the valve-regulated lead acid battery to help electric vehicles become a reality. Coordinates 45.396265°, -122.755099° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":45.396265,"lon":-122.755099,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

72

Michigan: General Motors Optimizes Engine Valve Technology  

Office of Energy Efficiency and Renewable Energy (EERE)

An EERE-supported effort to increase energy efficiency, while maintaining low emissions, has resulted in new engine valve technology on the 2014 Chevrolet Impala.

73

Install Removable Insulation on Valves and Fittings  

Broader source: Energy.gov [DOE]

This tip sheet on installing removable insulation on valves and fittings provides how-to advice for improving steam systems using low-cost, proven practices and technologies.

74

Michigan: General Motors Optimizes Engine Valve Technology |...  

Energy Savers [EERE]

has resulted in new engine valve technology on the 2014 Chevrolet Impala. EERE's Vehicle Technologies Office supported the research that led to this technical development...

75

Key valves prioritization study. Final report  

SciTech Connect (OSTI)

Key valves, installed in nuclear power plants, are those valves in which a malfunction can result in a shut down, in a reduction in power generation level, or in the extension of planned outages. Over two thousand Licensee Event Reports (LERs) are evaluated to identify the valve failure events which affected nuclear plant availability. Other data reporting systems are used to supplement the information collected for each event. A data base is established comprising 102 key valve failure events that are identified as the principal case of lost plant availability.

Riddington, J.W.

1984-10-01T23:59:59.000Z

76

D0 Silicon Upgrade: Control Dewar Valve Calculations  

SciTech Connect (OSTI)

This engineering note documents the calculations that were done to support the valve size selection for the magnet flow control valve, EVMF in the solenoid control dewar. The size selected was a control valve with a Cv = 0.32.

Rucinski, Russ; /Fermilab

1995-10-20T23:59:59.000Z

77

Cylinder valve packing nut studies  

SciTech Connect (OSTI)

The design, manufacture, and use of cylinder valve packing nuts have been studied to improve their resistance to failure from stress corrosion cracking. Stress frozen photoelastic models have been analyzed to measure the stress concentrations at observed points of failure. The load effects induced by assembly torque and thermal expansion of stem packing were observed by strain gaging nuts. The effects of finishing operations and heat treatment were studied by the strain gage hole boring and X-ray methods. Modifications of manufacturing and operation practices are reducing the frequency of stress corrosion failures.

Blue, S.C. [Martin Marietta Energy Systems, Inc., Paducah, KY (United States)

1991-12-31T23:59:59.000Z

78

Requirements for the Valve Train and Technolgies for Enabling...  

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

for the Valve Train and Technolgies for Enabling HCCI over the Entire Operating Range Requirements for the Valve Train and Technolgies for Enabling HCCI over the Entire Operating...

79

Advanced Materials for Lightweight Valve Train Components | Department...  

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

for Lightweight Valve Train Components Advanced Materials for Lightweight Valve Train Components Presentation from the U.S. DOE Office of Vehicle Technologies "Mega" Merit Review...

80

Characterization of the mitral valve using accelerated wear testing.  

E-Print Network [OSTI]

??There is a fundamental need for a better kind of long-term testing for artificial heart valves along with a biologically equivalent artificial mitral valve. Accelerated… (more)

Riggan, Courtney N.

2010-01-01T23:59:59.000Z

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


81

High speed exhaust gas recirculation valve  

DOE Patents [OSTI]

In order to minimize pollutants such as Nox, internal combustion engines typically include an exhaust gas recirculation (EGR) valve that can be used to redirect a portion of exhaust gases to an intake conduit, such as an intake manifold, so that the redirected exhaust gases will be recycled. It is desirable to have an EGR valve with fast-acting capabilities, and it is also desirable to have the EGR valve take up as little space as possible. An exhaust gas recirculation valve is provided that includes an exhaust passage tube, a valve element pivotally mounted within the exhaust passage tube, a linear actuator; and a gear train. The gear train includes a rack gear operatively connected to the linear actuator, and at least one rotatable gear meshing with the rack gear and operatively connected to the valve element to cause rotation of the valve element upon actuation of the linear actuator. The apparatus provides a highly compact package having a high-speed valve actuation capability.

Fensom, Rod (Peterborough, GB); Kidder, David J. (Peterborough, GB)

2005-01-18T23:59:59.000Z

82

Vertical pump with free floating check valve  

DOE Patents [OSTI]

A vertical pump with a bottom discharge having a free floating check valve isposed in the outlet plenum thereof. The free floating check valve comprises a spherical member with a hemispherical cage-like member attached thereto which is capable of allowing forward or reverse flow under appropriate conditions while preventing reverse flow under inappropriate conditions.

Lindsay, Malcolm (O'Hara Township, Allegheny County, PA)

1980-01-01T23:59:59.000Z

83

Minimizing energy losses in control valves  

SciTech Connect (OSTI)

The pulp and paper industry uses massive amounts of energy, but it could reduce its electricity consumption by about 2,000 MW worldwide by simply optimizing the pumping of process liquids. Wasted pumping power can be significantly reduced by sizing pumps and control valves more accurately, and by using new methods of pump and valve selection. Combining the improved control valve's installed flow characteristic with state-of-the-art sizing and simulation programs ensures minimal pressure drop across the control valve without loss of accurate and reliable control in all process conditions. If accurate process condition information is available at the planning stage, even more significant pumping energy savings can be achieved. Moreover, reduced pressure drop across the control valve reduces the likelihood of valve cavitation. This, in turn, reduces the need for noise attenuation, preventing cavitation erosion, and repairing damage. To make the most of the advantages gained by using highly developed control valve sizing and selection programs, closer cooperation between process licensees, process users, and valve manufacturers is also required.

Niemela, I.; Pyotsia, J. (Neles-Jamesbury Oy, Helsinki (Finland))

1994-08-01T23:59:59.000Z

84

Whitey SCHe Ball Valves Provide Test Port Isolation  

SciTech Connect (OSTI)

These valves are 1/4 inch ball valves fabricated of 316 stainless steel. Packing is TFE (standard). They are used as normally closed isolation valves for test ports in the SCHe System between the gage root valve and the pressure indicator.

MISKA, C.R.

2000-09-15T23:59:59.000Z

85

Whitey SCHe Ball Valves Provide Test Port Isolation  

SciTech Connect (OSTI)

These valves are 1/4-inch ball valves fabricated of 316 stainless steel. Packing is TFE (standard). They are used as normally closed isolation valves for test ports in the SCHe System between the gage root valve and the pressure indicator.

MISKA, C.R.

2000-10-19T23:59:59.000Z

86

Pressure compensated flow control valve  

DOE Patents [OSTI]

The invention is an air flow control valve which is capable of maintaining a constant flow at the outlet despite changes in the inlet or outlet pressure. The device consists of a shell assembly with an inlet chamber and outlet chamber separated by a separation plate. The chambers are connected by an orifice. Also located within the inlet chamber is a port controller assembly. The port controller assembly consists of a differential pressure plate and port cap affixed thereon. The cap is able to slide in and out of the orifice separating the inlet and outlet chambers. When the pressure differential is sufficient, the differential pressure plate rises or falls to maintain a constant air flow. Movement of the port controller assembly does not require the use of seals, diaphragms, tight tolerances, bushings, bearings, hinges, guides, or lubricants.

Minteer, Daniel J. (West Richland, WA)

1999-01-01T23:59:59.000Z

87

Motion planning for experimental air path control of a variable-valve-timing spark ignition engine  

E-Print Network [OSTI]

to driveability problems) and on the fuel/air ratio (FAR) (leading to pollution peaks). To compensateMotion planning for experimental air path control of a variable-valve-timing spark ignition engine Syste´mes, Mines-ParisTech 60, bd St Michel, 75272 Paris, France a r t i c l e i n f o Article history

88

Torque-Actuated Valves for Microfluidics  

Science Journals Connector (OSTI)

Torque-Actuated Valves for Microfluidics ... While these valves should be widely useful in the field of microfluidics, we demonstrate their use in portable, disposable microfluidic devices. ... Elastomeric polymersespecially poly(dimethylsiloxane) (PDMS)are used widely in microfluidics for several reasons:? (i) ease of fabrication using soft lithography and rapid prototyping;1-3 (ii) ability to incorporate seals, membranes, valves, and switches;4-7 (iii) transparency and compatibility with optical detection;8,9 and (iv) compatibility with water and biological molecules and cells. ...

Douglas B. Weibel; Maarten Kruithof; Scott Potenta; Samuel K. Sia; Andrew Lee; George M. Whitesides

2005-06-15T23:59:59.000Z

89

Method and apparatus for monitoring motor operated valve motor output torque and power at valve seating  

DOE Patents [OSTI]

A method and apparatus are provided for monitoring a motor operated valve during the brief period when the valve seats and the torque switch trips to deenergize the valve motor. The method uses voltage measurements on the load side of a deenergizing switch that opens to deenergize the motor to determine, among other things, final motor rotational speed and the decelerating torque at motor deenergization. 14 figs.

Casada, D.A.

1996-01-16T23:59:59.000Z

90

Method for valve seating control for an electro-hydraulic engine valve  

DOE Patents [OSTI]

Valve lift in an internal combustion engine is controlled by an electro-hydraulic actuation mechanism including a selectively actuable hydraulic feedback circuit.

Sun, Zongxuan (Plymouth, MN)

2011-01-11T23:59:59.000Z

91

The safety valve and climate policy  

E-Print Network [OSTI]

In discussions of a cap-and-trade system for implementation of Kyoto Protocol-type quantity targets, a "safety valve" was proposed where, by government sales of emissions permits at a fixed price, the marginal cost of the ...

Jacoby, Henry D.; Ellerman, A. Denny.

92

Project Development Specification for Valve Pit Manifold  

SciTech Connect (OSTI)

Establishes the performance, design development, and test requirements for the valve pit manifolds. The system engineering approach was used to develop this document in accordance with the guidelines laid out in the Systems Engineering Management Plan for Project W-314.

MCGREW, D.L.

2000-09-28T23:59:59.000Z

93

Well injection valve with retractable choke  

SciTech Connect (OSTI)

An injection valve is described for use in a well conduit consisting of: a housing having a bore, a valve closure member in the bore moving between open and closed positions, a flow tube telescopically movable in the housing for controlling the movement of the valve closure member, means for biasing the flow tube in a direction for allowing the valve closure member to move to the closed position, an expandable and contractible fluid restriction connected to the flow tube and extending into the bore for moving the flow tube to the open position in response to injection fluid, but allowing the passage of well tools through the valve, the restriction contractible in response to fluid flow, the restriction includes, segments movable into and out of the bore, and biasing means yieldably urging the segments into the bore, a no-go shoulder on the flow tube, and releasable lockout means between the flow tube and the housing for locking the flow tube and valve in the open position.

Pringle, R.E.

1986-07-22T23:59:59.000Z

94

Simulant Development for Hanford Tank Farms Double Valve Isolation (DVI) Valves Testing  

SciTech Connect (OSTI)

Leakage testing of a representative sample of the safety-significant isolation valves for Double Valve Isolation (DVI) in an environment that simulates the abrasive characteristics of the Hanford Tank Farms Waste Transfer System during waste feed delivery to the Waste Treatment and Immobilization Plant (WTP) is to be conducted. The testing will consist of periodic leak performed on the DVI valves after prescribed numbers of valve cycles (open and close) in a simulated environment representative of the abrasive properties of the waste and the Waste Transfer System. The valve operations include exposure to cycling conditions that include gravity drain and flush operation following slurry transfer. The simulant test will establish the performance characteristics and verify compliance with the Documented Safety Analysis. Proper simulant development is essential to ensure that the critical process streams characteristics are represented, National Research Council report “Advice on the Department of Energy's Cleanup Technology Roadmap: Gaps and Bridges”

Wells, Beric E.

2012-12-21T23:59:59.000Z

95

lead-isotope dating  

Science Journals Connector (OSTI)

lead-isotope dating, lead-lead dating, lead-isotope age measurement, lead-lead age measurement ? Blei-Isotopen(-Alters)bestimmung, f, Blei-Isotopen-Datierung

2014-08-01T23:59:59.000Z

96

Mechanisms of Oxidation-Enhanced Wear in Diesel Exhaust Valves...  

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

May 18-22, 2009 -- Washington D.C. pmp01blau.pdf More Documents & Publications Friction and Wear Reduction in Diesel Engine Valve Trains Materials for Advanced Engine Valve Train...

97

Novel design of a rotary valve using axiomatic design  

E-Print Network [OSTI]

Rotary valves have existed for millennia; and while they have developed tremendously since the first Roman valves, many of the same problems have persisted. The basic problems are caused by the coupling of functional ...

Peliks, Robert Bilgor

2005-01-01T23:59:59.000Z

98

Design and Implementation of Silicon Nitride Valves for Heavy...  

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

More Documents & Publications Durability of ACERT Engine Components Durability of ACERT Engine Components Advanced Materials for Lightweight Valve Train Components...

99

The pipeline and valve location problem  

Science Journals Connector (OSTI)

This paper, proposes an exact algorithm for the problem of locating a pipeline between two points of a network, as well as a set of safety valves which help control the damage caused by possible spills along the pipeline. A labelling approach is developed to determine simultaneously the optimal pipeline and valve locations, with the objective of optimising an impact measure that depends on the average number of accidents and their cost. Computational experiments on grid and random instances are presented in order to evaluate the algorithm's performance and to compare its results to the solutions provided by sequential approaches. [Received 11 May 2010; Revised 10 October 2010; Accepted 21 November 2010

Gilbert Laporte; Marta M.B. Pascoal

2012-01-01T23:59:59.000Z

100

Scoping Study on the Safety Impact of Valve Spacing in Natural Gas Pipelines  

SciTech Connect (OSTI)

The U.S. Department of Transportation's Pipeline and Hazardous Materials Safety Administration (PHMSA) is responsible for ensuring the safe, reliable, and environmentally sound operation of the nation's natural gas and hazardous liquid pipelines. Regulations adopted by PHMSA for gas pipelines are provided in 49 CFR 192, and spacing requirements for valves in gas transmission pipelines are presented in 49 CFR 192.179. The present report describes the findings of a scoping study conducted by Oak Ridge National Laboratory (ORNL) to assist PHMSA in assessing the safety impact of system valve spacing. Calculations of the pressures, temperatures, and flow velocities during a set of representative pipe depressurization transients were carried out using a one-dimensional numerical model with either ideal gas or real gas properties for the fluid. With both ideal gas and real gas properties, the high-consequence area radius for any resulting fire as defined by Stevens in GRI-00/0189 was evaluated as one measure of the pipeline safety. In the real gas case, a model for convective heat transfer from the pipe wall is included to assess the potential for shut-off valve failures due to excessively low temperatures resulting from depressurization cooling of the pipe. A discussion is also provided of some additional factors by which system valve spacing could affect overall pipeline safety. The following conclusions can be drawn from this work: (1) Using an adaptation of the Stephens hazard radius criteria, valve spacing has a negligible influence on natural gas pipeline safety for the pipeline diameter, pressure range, and valve spacings considered in this study. (2) Over the first 30 s of the transient, pipeline pressure has a far greater effect on the hazard radius calculated with the Stephens criteria than any variations in the transient flow decay profile and the average discharge rate. (3) Other factors besides the Stephens criteria, such as the longer burn time for an accidental fire, greater period of danger to emergency personnel, increased unavoidable loss of gas, and possible depressurization cooling of the shut-off valves may also be important when deciding whether a change in the required valve spacing would be beneficial from a safety standpoint. (4) The average normalized discharge rate of {lambda}{sub avg} = 0.33 assumed by Stephens in developing his safety criteria is an excellent conservative value for natural gas discharge at the pressures, valve spacings, and pipe diameter used in this study. This conclusion remains valid even when real rather than ideal gas properties are considered in the analysis. (5) Significant pipe wall cooling effects (T{sub w} < -50 F or 228 K) can extend for a mile or more upstream from the rupture point within 30 s of a break. These conditions are colder than the temperature range specifications for many valve lubricants. The length of the low-temperature zone due to this cooling effect is also essentially independent of the system shut-off valve spacing or the distance between the break and a compressor station. (6) Having more redundant shut-off valves available would reduce the probability that pipe cooling effects could interfere with isolating the broken area following a pipeline rupture accident.

Sulfredge, Charles David [ORNL

2007-07-01T23:59:59.000Z

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


101

Modeling Cylinder Valve in Hydrogen Fuel Cell Car  

Science Journals Connector (OSTI)

We develop a fast alternative to a complex finite element analysis (FEA) model of cylinder valve in hydrogen fuel cell car based on support vector machine (SVM). The inputs of model are shape parameters of core and plunger of the valve, and the output ... Keywords: modeling, cylinder valve, SVM, uniform design

Liang Yu; Shengnian Cai; Wang Na

2011-03-01T23:59:59.000Z

102

Heart Valve Disease James S. Gammie, MD  

E-Print Network [OSTI]

Heart Valve Disease James S. Gammie, MD Professor and Chief Division of Cardiac Surgery University USA Source: CDC #12;#12;CARDIOTHORACIC SURGEON: A SURGEON THAT TREATS HEART AND LUNG DISEASE #12;Valvular Heart Disease: Common and Under-diagnosed 0 2 4 6 8 10 12 14 18 - 44 45 - 54 55 - 64 65 - 74 > 75

Weber, David J.

103

New safety valve addresses environmental concerns  

SciTech Connect (OSTI)

This paper reports that Conoco Pipeline is using a unique relief valve to reduce costs while improving environmental protection at its facilities. Conoco Pipeline Co. Inc. began testing new relief valves in 1987 to present over-pressuring its pipelines while enhancing the safety, environmental integrity and profitability of its pipelines. Conoco worked jointly with Rupture Pin Technology Inc., Oklahoma City, to seek a solution to a series of safety, environmental, and operational risks in the transportation of crude oil and refined products through pipelines. Several of the identified problems were traced to a single equipment source: the reliability of rupture discs used at pipeline stations to relieve pressure by diverting flow to tanks during over-pressure conditions. Conoco's corporate safety and environmental policies requires solving problems that deal with exposure to hydrocarbon vapors, chemical spills or the atmospheric release of fugitive emissions, such as during rupture disc maintenance. The company had used rupture pin valves as vent relief devices in conjunction with development by Rick Austin of inert gas methods to protect the inner casing wall and outer carrier pipeline wall in pipeline road crossings. The design relies on rupture pin valves set at 5 psi to isolate vent openings from the atmosphere prior to purging the annular space between the pipeline and casing with inert gas to prevent corrosion. Speciality Pipeline Inspection and Engineering Inc., Houston, is licensed to distribute the equipment for the new cased-crossing procedure.

Taylor, J. (Rupture Pin Technology, Inc. Oklahoma City, OK (United States)); Austin, R. (Conoco Pipeline Co., Hennessey, OK (United States))

1992-10-01T23:59:59.000Z

104

Microfluidic Cell Electroporation Using a Mechanical Valve  

E-Print Network [OSTI]

Microfluidic Cell Electroporation Using a Mechanical Valve Jun Wang, M. Jane Stine, and Chang Lu Center, and Bindley Bioscience Center, Purdue University, West Lafayette, Indiana 47907 A microfluidic of integrating electroporation as a unit operation in large- scale microfluidic systems with the increasing

Lu, Chang

105

Disc valve for sampling erosive process streams  

DOE Patents [OSTI]

This is a patent for a disc-type, four-port sampling valve for service with erosive high temperature process streams. Inserts and liners of ..cap alpha..-silicon carbide respectively, in the faceplates and in the sampling cavities, limit erosion while providing lubricity for a smooth and precise operation. 1 fig.

Mrochek, J.E.; Dinsmore, S.R.; Chandler, E.W.

1984-08-16T23:59:59.000Z

106

Valve supporting arrangement of an internal combustion engine  

SciTech Connect (OSTI)

A supporting arrangement is described for a valve of an internal combustion engine having a valve stem portion, comprising a rigid member for supporting the stem portion of the valve for axial movement of the valve, a stamped or press-formed upper retainer connected to the upper portion of the valve stem, a lower annular retainer disposed on the rigid member and surrounding the valve stem, and a coil spring compressed between the upper and lower retainers to bias the valve in a direction to close the associated valve opening. The upper retainer has a substantially constant thickness throughout and comprises an annular collar portion having an essentially constant diameter along the length thereof with the diameter at least substantially equal to the inner diameter of the coil spring. The collar portion is coaxially disposed within an upper portion of the coil spring, an annular flange portion extending radially outwardly from the upper end of the collar portion and engaging with the upper end of the coil spring, and means for achieving a spline connection between the central portion of the retainer and the upper portion of the valve stem, and wherein the upper retainer is divided along a diameter into two identical elements which are disposed about the upper portion of the valve stem such that the radial pressure exerted by the coil spring operates to bias the identical elements into their respective positions operative to connect the upper retainer to the valve stem.

Hayashi, Y.

1986-05-27T23:59:59.000Z

107

Statistical Performance Evaluation Of Soft Seat Pressure Relief Valves  

SciTech Connect (OSTI)

Risk-based inspection methods enable estimation of the probability of failure on demand for spring-operated pressure relief valves at the United States Department of Energy's Savannah River Site in Aiken, South Carolina. This paper presents a statistical performance evaluation of soft seat spring operated pressure relief valves. These pressure relief valves are typically smaller and of lower cost than hard seat (metal to metal) pressure relief valves and can provide substantial cost savings in fluid service applications (air, gas, liquid, and steam) providing that probability of failure on demand (the probability that the pressure relief valve fails to perform its intended safety function during a potentially dangerous over pressurization) is at least as good as that for hard seat valves. The research in this paper shows that the proportion of soft seat spring operated pressure relief valves failing is the same or less than that of hard seat valves, and that for failed valves, soft seat valves typically have failure ratios of proof test pressure to set pressure less than that of hard seat valves.

Harris, Stephen P.; Gross, Robert E.

2013-03-26T23:59:59.000Z

108

Technical evaluation: 300 Area steam line valve accident  

SciTech Connect (OSTI)

On June 7, 1993, a journeyman power operator (JPO) was severely burned and later died as a result of the failure of a 6-in. valve that occurred when he attempted to open main steam supply (MSS) valve MSS-25 in the U-3 valve pit. The pit is located northwest of Building 331 in the 300 Area of the Hanford Site. Figure 1-1 shows a layout of the 300 Area steam piping system including the U-3 steam valve pit. Figure 1-2 shows a cutaway view of the approximately 10- by 13- by 16-ft-high valve pit with its various steam valves and connecting piping. Valve MSS-25, an 8-in. valve, is located at the bottom of the pit. The failed 6-in. valve was located at the top of the pit where it branched from the upper portion of the 8-in. line at the 8- by 8- by 6-in. tee and was then ``blanked off`` with a blind flange. The purpose of this technical evaluation was to determine the cause of the accident that led to the failure of the 6-in. valve. The probable cause for the 6-in. valve failure was determined by visual, nondestructive, and destructive examination of the failed valve and by metallurgical analysis of the fractured region of the valve. The cause of the accident was ultimately identified by correlating the observed failure mode to the most probable physical phenomenon. Thermal-hydraulic analyses, component stress analyses, and tests were performed to verify that the probable physical phenomenon could be reasonably expected to produce the failure in the valve that was observed.

Not Available

1993-08-01T23:59:59.000Z

109

lead-isotope age  

Science Journals Connector (OSTI)

lead-isotope age, lead-lead age [An age in years calculated from the ratio of lead-207 to lead-206, a by-product of the uranium-thorium-lead age method] ? Blei-Isotopen-Alter n

2014-08-01T23:59:59.000Z

110

Library Regulations Library Regulations  

E-Print Network [OSTI]

Library Regulations 2012-13 Library Regulations UNIVERSITY OF BIRMINGHAM REGULATIONS LIBRARY REGULATIONS Preamble: The Library Regulations apply to all users of library facilities managed on behalf of the University by Library Services, and thus there are sections that apply also to non- members of the University

Birmingham, University of

111

Curved butterfly bileaflet prosthetic cardiac valve  

DOE Patents [OSTI]

An annular valve body having a central passageway for the flow of blood therethrough with two curved leaflets each of which is pivotally supported on an accentric positioned axis in the central passageway for moving between a closed position and an open position. The leaflets are curved in a plane normal to the eccentric axis and positioned with the convex side of the leaflets facing each other when the leaflets are in the open position. Various parameters such as the curvature of the leaflets, the location of the eccentric axis, and the maximum opening angle of the leaflets are optimized according to the following performance criteria: maximize the minimum peak velocity through the valve, maximize the net stroke volume, and minimize the mean forward pressure difference, thereby reducing thrombosis and improving the hemodynamic performance.

McQueen, David M. (185 Hillside Ave., Chatham, NJ 07928); Peskin, Charles S. (186 Harrard Dr., Hartsdale, NY 10530)

1991-06-25T23:59:59.000Z

112

Water cooling of HVDC thyristor valves  

SciTech Connect (OSTI)

It is generally accepted that water is a very effective medium to remove heat losses from any type of equipment. When used for HVDC thyristor valves, the fundamentals of electrolyte conduction and water chemistry need to be considered in the design of the cooling circuit. The characteristics of the materials used, in conjunction with high voltage stresses and circuit configuration, play an important role to assure longevity and corrosion-free performance.

Lips, H.P. (Siemens AG, Erlangen (Germany))

1994-10-01T23:59:59.000Z

113

Diagnostic for two-mode variable valve activation device  

DOE Patents [OSTI]

A method is provided for diagnosing a multi-mode valve train device which selectively provides high lift and low lift to a combustion valve of an internal combustion engine having a camshaft phaser actuated by an electric motor. The method includes applying a variable electric current to the electric motor to achieve a desired camshaft phaser operational mode and commanding the multi-mode valve train device to a desired valve train device operational mode selected from a high lift mode and a low lift mode. The method also includes monitoring the variable electric current and calculating a first characteristic of the parameter. The method also includes comparing the calculated first characteristic against a predetermined value of the first characteristic measured when the multi-mode valve train device is known to be in the desired valve train device operational mode.

Fedewa, Andrew M

2014-01-07T23:59:59.000Z

114

Novel 4-Way Refrigerant Reversing Valve for Heat Pumps  

SciTech Connect (OSTI)

This project is nearing completion. Since the last progress report (November, 1999), all experimental tests have been completed. Preliminary analysis shows the refrigerant pressure drops through the reversing valve were reduced by an average of about 60{percent}, when compared to traditional reversing valves. Also, the prototype reversing valve reduced the overall coefficient of performance (COP) by an average of only 0.45{percent}.

Darin W. Nutter

2000-02-17T23:59:59.000Z

115

Subsurface safety valve with lock-open system  

SciTech Connect (OSTI)

A well safety valve is described comprising: a housing having a bore therethrough; a valve mounted in the housing to open and close to control the flow through the bore; an operator tube in the housing for opening the valve; means in the housing for moving the operator tube in a first direction to open and hold the valve open; means in the housing for moving the operator tube in a second direction to permit the valve to close; a temporary lockout sleeve in the housing in tandem with the operator tube for temporarily holding the valve open. The operator tube and the lockout sleeve are in end-to-end contact when the lockout sleeve is inoperative and the operator tube is holding the valve open, when the operator tube and the lockout sleeve are moving simultaneously in the housing between operating positions, and when the operator tube is inoperative and the lockout sleeve is holding the valve open; and the operator tube and the lockout sleeve each having means for coupling the operator tube and the lockout sleeve with a lockout tool for moving the operator tube and the lockout sleeve simultaneously when the lockout sleeve is moved from the inoperative to an operative position holding the valve open.

Dickson, R.L.; Smith, R.R.

1986-11-25T23:59:59.000Z

116

Soft robot actuators using energy-efficient valves controlled by electropermanent magnets  

E-Print Network [OSTI]

This paper presents the design, fabrication, and evaluation of a novel type of valve that uses an electropermanent magnet [1]. This valve is then used to build actuators for a soft robot. The developed EPM valves require ...

Marchese, Andrew Dominic

117

E-Print Network 3.0 - air operated valve Sample Search Results  

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

.5 mm in dia- meter. To create an inlet for air into the pneumatic valve, we used polyethylene tubing... the pneumatic valve, we connected the tubing of the valve ... Source:...

118

Second Peer Review for New MGI Valves for NSTX-U  

E-Print Network [OSTI]

Second Peer Review for New MGI Valves for NSTX-U (Update on Valve Tes · Characterize this valve upto 1000 Torr.L · Describe results in Peer Review (Jan, 2014

Princeton Plasma Physics Laboratory

119

Self-regulating flow control device  

SciTech Connect (OSTI)

A variable, self-regulating valve having a hydraulic loss coefficient proportional to a positive exponential power of the flow rate. The device includes two objects in a flow channel and structure which assures that the distance between the two objects is an increasing function of the flow rate. The range of spacing between the objects is such that the hydraulic resistance of the valve is an increasing function of the distance between the two objects so that the desired hydraulic loss coefficient as a function of flow rate is obtained without variation in the flow area.

Humphreys, Duane A. (Pittsburgh, PA)

1984-01-01T23:59:59.000Z

120

Corrosion in HVDC valve cooling systems  

SciTech Connect (OSTI)

Stainless steel couplings in the main cooling water pipes of HVDC thyristor valves have been in use since 1983, with an overall satisfactory behavior. However, some water leakage due to corrosion below the sealing O-rings of the couplings was observed during 1992. An extensive investigation and follow-up worldwide showed a direct correlation between water quality and the corrosion rate of the stainless steel couplings. Recommendations are given about actions to be taken in order to maintain a long lifetime for the fine water systems.

Jackson, P.O.; Abrahamsson, B.; Gustavsson, D.; Igetoft, L.

1997-04-01T23:59:59.000Z

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


121

E-Print Network 3.0 - aortic valve bioprosthesis Sample Search...  

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

of Biomechanics 34 (2001) 12791289 A nonlinear anisotropic model for porcine aortic heart valves Summary: of porcine aortic valve leaflet has potentially significant effects on...

122

E-Print Network 3.0 - aortic valve insufficiency Sample Search...  

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

insufficiency Page: << < 1 2 3 4 5 > >> 1 Interaction between the mitral and aortic heart valve Summary: Interaction between the mitral and aortic heart valve an experimental...

123

E-Print Network 3.0 - aortic valve reconstruction Sample Search...  

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

reconstruction Page: << < 1 2 3 4 5 > >> 1 Interaction between the mitral and aortic heart valve Summary: Interaction between the mitral and aortic heart valve an experimental...

124

E-Print Network 3.0 - aortic disc valve Sample Search Results  

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

Hannover Collection: Biology and Medicine 2 Interaction between the mitral and aortic heart valve Summary: Interaction between the mitral and aortic heart valve an experimental...

125

E-Print Network 3.0 - aortic valve prostheses Sample Search Results  

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

... Source: Collection: Engineering 2 Interaction between the mitral and aortic heart valve Summary: and aortic valve prostheses as well as give directions for improvement...

126

E-Print Network 3.0 - aortic valve morphology Sample Search Results  

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

Toronto Collection: Engineering ; Biology and Medicine 2 Mechanobiology of the Aortic Heart Valve Jonathan T. Butcher1 Summary: Review: Mechanobiology of the Aortic Heart Valve...

127

E-Print Network 3.0 - aortic valve interstitial Sample Search...  

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

Toronto Collection: Engineering ; Biology and Medicine 2 Mechanobiology of the Aortic Heart Valve Jonathan T. Butcher1 Summary: Review: Mechanobiology of the Aortic Heart Valve...

128

E-Print Network 3.0 - absent pulmonary valve Sample Search Results  

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

Science 3 Insertion of Heart Valves by Catheterization Design Team Summary: treatment (patch) results in degenerated pulmonary heart valves. Open-heart surgery is expensive,...

129

Classification of heart valve condition using acoustic measurements  

SciTech Connect (OSTI)

Prosthetic heart valves and the many great strides in valve design have been responsible for extending the life spans of many people with serious heart conditions. Even though the prosthetic valves are extremely reliable, they are eventually susceptible to long-term fatigue and structural failure effects expected from mechanical devices operating over long periods of time. The purpose of our work is to classify the condition of in vivo Bjork-Shiley Convexo-Concave (BSCC) heart valves by processing acoustic measurements of heart valve sounds. The structural failures of interest for Bscc valves is called single leg separation (SLS). SLS can occur if the outlet strut cracks and separates from the main structure of the valve. We measure acoustic opening and closing sounds (waveforms) using high sensitivity contact microphones on the patient`s thorax. For our analysis, we focus our processing and classification efforts on the opening sounds because they yield direct information about outlet strut condition with minimal distortion caused by energy radiated from the valve disc.

Clark, G. [Lawrence Livermore National Lab., CA (United States)

1994-11-15T23:59:59.000Z

130

Reducing pressure loss of large diameter check valves  

SciTech Connect (OSTI)

Transcend Inc., a consulting firm that specializes in the use of computer simulation to optimize existing equipment and system designs, was approached by Mannesmann Demag AG, Moenchengladbach, Germany to optimize the design of its DRV-B check valve. In one of the first applications of Computational Fluid Dynamics (CFD) technology to valve design, the pressure loss coefficient (K) of the DRV-B valve was lowered to 0.40--0.50 for valve sizes NPS48--NPS12, the lowest possible level for this type of valve. The flow efficiency is three times better than that of the earlier design. As a result, the optimized Mannesmann Demag DRV-B check valve provides a dramatic reduction in operating cost, particularly in transmission service where natural gas is transported over long distances. The reduced pressure loss saves compressor fuel cost. For the optimized valve, the incremental compressor fuel cost is reduced to 1.5-times the capital cost of the valve calculated over a 20-year Life Cycle Cost (LCC) period.

NONE

1997-09-01T23:59:59.000Z

131

Processing of prosthetic heart valve sounds for classification. Revision 1  

SciTech Connect (OSTI)

People with serious heart conditions have had their expected life span extended considerably with the development of the prosthetic heart valve especially with the great strides made in valve design. Even though the designs are extremely reliable, the valves are mechanical and operating continuously over a long period, therefore, structural failures can occur due to fatigue. Measuring heart sounds non-invasively in a noisy environment puts more demands on the signal processing to extract the desired signals from the noise. In this paper the authors discuss acoustical signal processing techniques developed to process noisy heart valve sounds measured by a sensitive, surface contact microphone and used for the eventual classification of the valve.

Candy, J.V.; Jones, H.E.

1994-04-01T23:59:59.000Z

132

Processing of Prosthetic Heart Valve Sounds from Anechoic Tank Measurements  

SciTech Connect (OSTI)

People with serious cardiac problems have had their life span extended with the development of the prosthetic heart valve. However, the valves operate continuously at approximately 39 million cycles per year and are therefore subject to structural failures either by faulty design or material fatigue. The development of a non-invasive technique using an acoustic contact microphone and sophisticated signal processing techniques has been proposed and demonstrated on limited data sets. In this paper we discuss an extension of the techniques to perform the heart valve tests in an anechoic like. Here the objective is to extract a ''pure'' sound or equivalently the acoustical vibration response of the prosthetic valves in a quiet environment. The goal is to demonstrate that there clearly exist differences between values which have a specific mechanical defect known as single leg separation (SLS) and non-defective valves known as intact (INT). We discuss the signal processing and results of anechoic acoustic measurements on 50 prosthetic valves in the tank. Finally, we show the results of the individual runs for each valve, point out any of the meaningful features that could be used to distinguish the SLS from INT and summarize the experiments.

Candy, J V; Meyer, A W

2001-03-20T23:59:59.000Z

133

Analysis of a Third-Generation Princeton Tri-leaflet Mechanical Heart Valve  

E-Print Network [OSTI]

Analysis of a Third-Generation Princeton Tri-leaflet Mechanical Heart Valve Michael Hsu Advisor heart valve · Static analysis of leaflet under uniform pressure of 10 MPa Summer Objectives · Find Heart valve disease · Over 5 million affected · Over 225,000 valve- replacement surgeries performed

Petta, Jason

134

Noninvasive valve monitor using constant magnetic and/or DC electromagnetic field  

DOE Patents [OSTI]

One or more sources of steady magnetic field are carefully located on the outside of a valve body. The constant magnetic field is transmitted into the valve body and valve internals. A magnetic field detector carefully located on the outside of the valve body detects the intensity of the magnetic field at its location. As the position of a valve internal part is changed, there is an alteration in the magnetic field in the valve, and a consequent change in the detected magnetic field. Changes in the detected signal provide an indication of the position and motion of the valve internals.

Casada, D.A.; Haynes, H.D.

1993-08-17T23:59:59.000Z

135

Drinking Water Problems: Lead  

E-Print Network [OSTI]

Lead in drinking water can damage the brain, kidneys, nervous system and red blood cells. This publication explains how lead can enter drinking water, how to have your water tested, and how to eliminate lead from drinking water....

Dozier, Monty; McFarland, Mark L.

2004-02-20T23:59:59.000Z

136

Getting the Lead Out  

DOE R&D Accomplishments [OSTI]

Discarded electronics no longer pose an environmental hazard from lead solder thanks to a lead-free alternative developed at the Ames Laboratory.

Gibson, Kerry

2011-04-08T23:59:59.000Z

137

Friction and Wear Reduction in Diesel Engine Valve Trains  

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

commercial exhaust valve * Surface damage from 20,000 impacts displays micro-welding, plastic deformation, and transfer. 9 Managed by UT-Battelle for the Department of Energy...

138

Mechanisms of Oxidation-Enhanced Wear in Diesel Exhaust Valves...  

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

of wear oxidation microstructures of alloys Fe-, Ni-, Co-alloys h T h i h v Combined plastic deformation, wear, and oxidation on both valve and seat surfaces 6 Managed by...

139

Production-Intent Lost-Motion Variable Valve Actuation Systems  

Broader source: Energy.gov [DOE]

Variable valve actuation with on/off IEGR pre-bump is an enabling technology for HCCI, PCCI, LTC and other advanced combustion techniques, and designs for production-intent equipment have been developed

140

Spin-valve photodiode Ian Appelbaum,a)  

E-Print Network [OSTI]

Spin-valve photodiode Ian Appelbaum,a) D. J. Monsma, K. J. Russell, V. Narayanamurti, and C. M using internal photoemission to generate hot electrons in magnetic multilayer Schottky photodiodes

Russell, Kasey

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


141

Investigation of valve plate in water hydraulic axial piston motor  

Science Journals Connector (OSTI)

This paper has introduced the developments of water hydraulic axial piston equipments. According to the effects of physico-chemical properties of water on water hydraulic components, a novel valve plate for water

Song-Lin Nie Ph.D; Zhuang-Yun Li…

2002-03-01T23:59:59.000Z

142

International Environmental Agreements: Emissions trade, safety valves and escape clauses  

E-Print Network [OSTI]

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 5 Escape clauses versus safety valves 13 6 Review of "standard model" of IEAs 14 6.1 Dynamics The effect of emissions trade on IEA participation 17 7.1 Ex ante heterogenous countries

Karp, Larry S.

143

Electric actuation of a surface controlled subsea safety valve  

E-Print Network [OSTI]

to the conversion of many components from hydraulic operation to electric. Therefore, it is the purpose of this report to detail and propose an engineering solution to the electrical conversion of a surface controlled subsea safety valve (SCSSV). Preliminary...

Bartlett, Timothy Joseph

2013-02-22T23:59:59.000Z

144

Energy Savings Potential of Process Control Valve Replacement  

E-Print Network [OSTI]

candidates for savings. A feasibility study of retrofitting a pipeline flow control system, currently operating with a constant speed pump and differential producing, modulating control valve, with a variable speed drive is presented. This case study...

Holzenthal, L. Jr.

145

Signal processing of Shiley heart valve data for fracture detection  

SciTech Connect (OSTI)

Given digital acoustic data emanating from the heart sounds of the beating heart measured from laboratory sheep with implanted Bjoerk-Shiley Convexo-Concave heart valves, it is possible to detect and extract the opening and closing heart beats from the data. Once extracted, spectral or other information can then obtained from the heartbeats and passed on to feature extraction algorithms, neutral networks, or pattern recognizers so that the valve condition, either fractured or intact, may be determined.

Mullenhoff, C.

1993-04-01T23:59:59.000Z

146

Signal processing of Shiley heart valve data for fracture detection  

SciTech Connect (OSTI)

Given digital acoustic data emanating from the heart sounds of the beating heart measured from laboratory sheep with implanted Bjoerk-Shiley Convexo-Concave heart valves, it is possible to detect and extract the opening and closing heart beats from the data. Once extracted, spectral or other information can then obtained from the heartbeats and passed on to feature extraction algorithms, neural networks, or pattern recognizers so that the valve condition, either fractured or intact, may be determined.

Mullenhoff, C.

1993-09-01T23:59:59.000Z

147

Sizing safety valve vent pipes for saturated steam  

SciTech Connect (OSTI)

A generalized procedure based on pressure and entropy as independent variables is used to calculate choked flow conditions at the valve orifice, valve pipe outlet and vent pipe outlet. At the third location, the results are independent of whether flow in the vent pipe is supersonic or subsonic. An integral method is used to calculate the vent pipe length required to choke the flow. 16 refs.

Brandmaier, H.E.

1982-01-01T23:59:59.000Z

148

Valving for controlling a fluid-driven reciprocating apparatus  

DOE Patents [OSTI]

A pair of control valve assemblies for alternately actuating a pair of fluid-driven free-piston devices by using fluid pressure communication therebetween. Each control valve assembly is switched by a pressure signal depending on the state of its counterpart's piston. The communication logic is arranged to provide overlap of the forward strokes of the pistons, so that at least one of the pair will always be pressurized. Thus, uninterrupted pumping of liquid is made possible from a pair of free-piston pumps. In addition, the speed and frequency of piston stroking is entirely dependent on the mechanical power load applied. In the case of a pair of pumps, this enables liquid delivery at a substantially constant pressure over the full range of flow rates, from zero to maximum flow. Each of the valve assemblies uses an intake-exhaust valve and a signal valve with the signal valve of one pump being connected to be pressure responsive to the piston of the opposite cylinder or pump.

Whitehead, John C. (Davis, CA)

1995-01-01T23:59:59.000Z

149

Valving for controlling a fluid-driven reciprocating apparatus  

DOE Patents [OSTI]

A pair of control valve assemblies is described for alternately actuating a pair of fluid-driven free-piston devices by using fluid pressure communication therebetween. Each control valve assembly is switched by a pressure signal depending on the state of its counterpart`s piston. The communication logic is arranged to provide overlap of the forward strokes of the pistons, so that at least one of the pair will always be pressurized. Thus, uninterrupted pumping of liquid is made possible from a pair of free-piston pumps. In addition, the speed and frequency of piston stroking is entirely dependent on the mechanical power load applied. In the case of a pair of pumps, this enables liquid delivery at a substantially constant pressure over the full range of flow rates, from zero to maximum flow. Each of the valve assemblies uses an intake-exhaust valve and a signal valve with the signal valve of one pump being connected to be pressure responsive to the piston of the opposite cylinder or pump. 15 figs.

Whitehead, J.C.

1995-06-27T23:59:59.000Z

150

Motor current signature analysis for determining operational readiness of motor-operated valves (MOVs)  

SciTech Connect (OSTI)

Motor current signature analysis (MCSA) is a novel diagnostic process for condition monitoring of electric-motor-driven mechanical equipment (e.g., pumps, motor-operated valves, compressors, and processing machinery). The MCSA process identifies, characterizes, and trends over time the instantaneous load variations of mechanical equipment in order to diagnose changes in the condition of the equipment (e.g., due to degradation or service wear), which, if allowed to continue, may lead to failure. It monitors the instantaneous variations (noise content) in the electric current flowing through the power leads to the electric motor that drives the equipment. The motor itself thereby acts as a transducer, sensing both large and small, long-term and rapid, mechanical load variations and converting them to variations in the induced current generated in the motor windings. This motor current noise signature is detected, amplified, and further processed as needed to examine its time domain and frequency domain (spectral) characteristics. The operational principles of MCSA and the nonintrusive data collection apparatus and procedure used with MOVs will be described. Data collected from MOVs in both laboratory and in-plant environments will also be shown to illustrate the ability of MCSA to ''see'' the detailed inner workings of the valve and operator and thus to detect degraded performance at an incipient stage. (Set of 18 vugraphs)

Kryter, R.C.; Haynes, H.D.

1987-01-01T23:59:59.000Z

151

Valves - current operating experience of slurry valves (block and letdown) in coal liquefaction processes. Third quarter report  

SciTech Connect (OSTI)

This paper summarizes the recent letdown and block valve experience in the liquefaction pilot plants. Also included is a brief description of the research and development activities on valves which are conducted in supporting laboratories. The purpose of the summary is to concentrate on critical component problems common to all liquefaction plants, to avoid duplication of efforts, and to help provide timely solutions to the valve problems. The main source of information used in this paper is the Minutes of the Critical Component and Materials Meeting which is sponsored by the Office of Coal Processing, Fossil Energy, Department of Energy. Other sources of information such as the technical progress reports are also included based on availability and relevance to topics covered in this paper. It is intended that this report will be followed by updates as pertinent information concerning valves becomes available. In the subsequent sections of this paper a brief outline of past valve studies is given as background material followed by a summary of the most recent valve operating experience at the liquefaction plants.

NONE

1996-07-01T23:59:59.000Z

152

Engine including hydraulically actuated valvetrain and method of valve overlap control  

DOE Patents [OSTI]

An exhaust valve control method may include displacing an exhaust valve in communication with the combustion chamber of an engine to an open position using a hydraulic exhaust valve actuation system and returning the exhaust valve to a closed position using the hydraulic exhaust valve actuation assembly. During closing, the exhaust valve may be displaced for a first duration from the open position to an intermediate closing position at a first velocity by operating the hydraulic exhaust valve actuation assembly in a first mode. The exhaust valve may be displaced for a second duration greater than the first duration from the intermediate closing position to a fully closed position at a second velocity at least eighty percent less than the first velocity by operating the hydraulic exhaust valve actuation assembly in a second mode.

Cowgill, Joel (White Lake, MI)

2012-05-08T23:59:59.000Z

153

System and method for controlling hydraulic pressure in electro-hydraulic valve actuation systems  

DOE Patents [OSTI]

A control system for an engine includes a first lift control module and a second lift control module. The first lift control module increases lift of M valves of the engine to a predetermined valve lift during a period before disabling or re-enabling N valves of the engine. The second lift control module decreases the lift of the M valves to a desired valve lift during a period after enabling or re-enabling the N valves of the engine, wherein N and M are integers greater than or equal to one.

Brennan, Daniel G; Marriott, Craig D; Cowgill, Joel; Wiles, Matthew A; Patton, Kenneth James

2014-09-23T23:59:59.000Z

154

Palaeoclimate Coordinating Lead Authors  

E-Print Network [OSTI]

6 Palaeoclimate Coordinating Lead Authors: Eystein Jansen (Norway), Jonathan Overpeck (USA) Lead (UK) This chapter should be cited as: Jansen, E., J. Overpeck, K.R. Briffa, J.-C. Duplessy, F. Joos, V

155

Classification of prosthetic heart valve sounds. A parametric approach  

SciTech Connect (OSTI)

People with heart problems have had their lives extended considerably with the development of the prosthetic heart valve. Great strides have been made in the development of the valves through the use of improved materials as well as efficient mechanical designs. However, since the valves operate continuously over a long period, structural failures can occur-even though they are relatively uncommon. Here the development of techniques to classify the valve either as having intact struts or as having a separated strut, commonly called single leg separation, is discussed. In this paper the signal processing techniques employed to extract the required signals/parameters are briefly reviewed and then it is shown how they can be used to simulate a synthetic heart valve database for eventual Monte Carlo testing. Next, the optimal classifier is developed under assumed conditions and its performance is compared to that of an adpative-type classifier implemented with a probabilistic neural network. Finally, the adaptive classifier is applied to a data set and its performance is analyzed. Based on synthetic data it is shown that excellent performance of the classifiers can be achieved implying a potentially robust solution to this classification problem. 21 refs., 11 figs., 1 tab.

Candy, J.V.; Jones, H.E. [Univ. of California, Livermore, CA (United States)]|[Lawrence Livermore National Lab., CA (United States)

1995-06-01T23:59:59.000Z

156

Measuring while drilling apparatus mud pressure signal valve  

SciTech Connect (OSTI)

This patent describes a measurement while drilling system for borehole drilling having a downhole instrument connectable in a drill string of a rotary drilling rig including apparatus to sense geological and geophysical parameters and a valve apparatus to pulse modulate drilling fluid flowing in the drill string. A surface apparatus is connected to a drilling fluid flow conductor for extracting intelligence carrying information from the modulated drilling fluid. An improved valve apparatus is described comprising: (a) a drilling fluid flow pulse modulating pressure pulse valve member longitudinally, movably mounted in a body member and movable from a retracted position substantially removed from the drilling fluid flow and an extended position disposed at least partially within the drilling fluid flow thereby temporarily restricting drilling fluid flow within the drill string; and (b) the pulse valve member is a tubular member having a lower end portion displaceable from the body member into the drilling fluid and an upper end portion with opposed fluid pressure force areas thereon being in fluid communication with the drilling fluid flow such that forces due to the drilling fluid acting on the pressure pulse valve member are balanced in a longitudinal direction.

Peppers, J.M.; Shaikh, F.A.

1986-12-09T23:59:59.000Z

157

Lead and Lead-210 in Rainwater  

Science Journals Connector (OSTI)

... residence time of the lead-210 can be estimated from the ratio of its specific activity to that of one of its decay products, bismuth-210 or polonium-21058, this ... rainwater. The samples, of between 1 and 6 L, were filtered through a fritted glass filter before analysis. Analyses of both portions of the sample showed that less than ...

G. L. TER HAAR; R. B. HOLTZMAN; H. F. LUCAS

1967-10-28T23:59:59.000Z

158

Drive piston assembly for a valve actuator assembly  

DOE Patents [OSTI]

A drive piston assembly is provided that is operable to selectively open a poppet valve. The drive piston assembly includes a cartridge defining a generally stepped bore. A drive piston is movable within the generally stepped bore and a boost sleeve is coaxially disposed with respect to the drive piston. A main fluid chamber is at least partially defined by the generally stepped bore, drive piston, and boost sleeve. First and second feedback chambers are at least partially defined by the drive piston and each are disposed at opposite ends of the drive piston. At least one of the drive piston and the boost sleeve is sufficiently configured to move within the generally stepped bore in response to fluid pressure within the main fluid chamber to selectively open the poppet valve. A valve actuator assembly and engine are also provided incorporating the disclosed drive piston assembly.

Sun, Zongxuan (Troy, MI)

2010-02-23T23:59:59.000Z

159

An iterative algorithm for model-based predictive control of an electro-pneumatic valve actuator  

Science Journals Connector (OSTI)

The benefits of utilizing camless valve actuations for internal combustion engines are primarily due to their ability of significantly improving engine performance. There are mainly three kinds of camless valve actuators: electro-magnetic, electro-hydraulic, ...

Guoming G. Zhu; Jia Ma; Harold Schock

2009-06-01T23:59:59.000Z

160

E-Print Network 3.0 - aortic valve stenosis Sample Search Results  

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

valve is the most common cause for aortic stenosis. Risk... without such risk factors (Peltier et al., 2003). Regardless of the etiology of the aortic valve stenosis... with an ......

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


161

E-Print Network 3.0 - aortic valve area Sample Search Results  

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

<< < 1 2 3 4 5 > >> 1 A Computational Model of Aging and Calcification in the Aortic Heart Valve Summary: fluid velocity and aortic valve opening area (AVA) at each age. These...

162

E-Print Network 3.0 - aortic heart valve Sample Search Results  

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

heart valve Search Powered by Explorit Topic List Advanced Search Sample search results for: aortic heart valve Page: << < 1 2 3 4 5 > >> 1 Non-Invasive Evaluation of Opening and...

163

E-Print Network 3.0 - aortic valve regurgitation Sample Search...  

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

regurgitation Page: << < 1 2 3 4 5 > >> 1 Interaction between the mitral and aortic heart valve Summary: or regurgitation. In 2001, of all valve diseases in the left ventricle,...

164

E-Print Network 3.0 - aortic valve thickening Sample Search Results  

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

<< < 1 2 3 4 5 > >> 1 A Computational Model of Aging and Calcification in the Aortic Heart Valve Summary: of a normal, healthy valve thicken and become less extensible over...

165

Effect of respiration on Doppler parameters of normal tricuspid porcine bioprosthetic valves  

Science Journals Connector (OSTI)

The Doppler indexes of tricuspid porcine bioprosthetic valves were evaluated in twelve patients without clinical and two-dimensional echocardiographic evidence of valve dysfunction. Peak and mean pressure grad...

Bernard Cosyns; Guy van Camp; Alain Friart…

1995-03-01T23:59:59.000Z

166

Development and introduction of wire for engine valve springs in VAZ  

Science Journals Connector (OSTI)

Valve springs (inner and outer) are critical parts of a car and therefore should meet stringent requirements with respect to their endurance and elastic properties. Results of work on introducing wire for valv...

V. G. Azizbekyan; R. M. Gaizullin; M. D. Kopyl…

1996-11-01T23:59:59.000Z

167

Water Consumption from Freeze Protection Valves for Solar Water Heating Systems  

SciTech Connect (OSTI)

Conference paper regarding research in the use of freeze protection valves for solar domestic water heating systems in cold climates.

Burch, J.; Salasovich, J.

2005-12-01T23:59:59.000Z

168

Piping retrofit reduces valve-damaging flow vibration  

SciTech Connect (OSTI)

This article describes how excessive flow-induced vibration was escalating safety relief valve maintenance at an alarming pace until simple piping modifications eliminated the problem. Public Service Co. of Colorado's (PSCO) Cherokee Station Unit 4 had been experiencing excessive hot and cold reheat safety valve maintenance. From 1990 through 1993, expenditures exceeded $150,000, including a complete refurbishing in 1990. Furthermore, from 1990 to 1992 the incurred costs of contracting VR certificate repairs accumulated to more than $50,000. Such exorbitant maintenance costs were unique among PSCO's generating system.

Webb, M.; Ellenberger, P.

1995-01-01T23:59:59.000Z

169

Investigation of valve failure problems in LWR power plants  

SciTech Connect (OSTI)

An analysis of component failures from information in the computerized Nuclear Safety Information Center (NSIC) data bank shows that for both PWR and BWR plants the component category most responsible for approximately 19.3% of light water reactor (LWR) power plant shutdowns. This investigation by Burns and Roe, Inc. shows that the greatest cause of shutdowns in LWRs due to valve failures is leakage from valve stem packing. Both BWR plants and PWR plants have stem leakage problems (BWRs, 21% and PWRs, 34%).

None

1980-04-01T23:59:59.000Z

170

Magnetism reflectometer study shows LiF layers improve efficiency in spin valve devices  

SciTech Connect (OSTI)

New, more efficient materials for spin valves - a device used in magnetic sensors, random access memories, and hard disk drives - may be on the way based on research using the magnetism reflectometer at Oak Ridge National Laboratory (ORNL). Spin valve devices work by means of two or more conducting magnetic material layers that alternate their electrical resistance depending on the layers alignment. Giant magnetoresistance is a quantum mechanical effect first observed in thin film structures about 20 years ago. The effect is observed as a significant change in electrical resistance, depending on whether the magnetization of adjacent ferromagnetic layers is in a parallel or an antiparallel magnetic alignment. 'What we are doing here is developing new materials. The search for new materials suitable for injecting and transferring carriers with a preferential spin orientation is most important for the development of spintronics,' said Valeria Lauter, lead instrument scientist on the magnetism reflectometer at the Spallation Neutron Source (SNS), who collaborated on the experiment. The researchers discovered that the conductivity of such materials is improved when an organic polymer semiconductor layer is placed between the magnetic materials. Organic semiconductors are now the material of choice for future spin valve devices because they preserve spin coherence over longer times and distances than conventional semiconductors. While research into spin valves has been ongoing, research into organic semiconductors is recent. Previous research has shown that a 'conductivity mismatch' exists in spin valve systems in which ferromagnetic metal electrodes interface with such organic semiconductors as Alq3 ({pi}-conjugated molecule tris(8-hydroxy-quinoline) aluminium). This mismatch limits the efficient injection of the electrons from the electrodes at the interface with the semiconductor material. However, lithium fluoride (LiF), commonly used in light-emitting diodes, has been found to enhance the injection of electrons through the semiconductor. Researchers from the University of Alabama and ORNL used polarized neutrons at the magnetism reflectometer at SNS to investigate the electronic, magnetic, and structural properties of the electrodes in a novel system. In this system, the magnetic layers cobalt and Ni{sub 80}Fe{sub 20} are interfaced with spacer layers composed of the organic semiconductor Alq3. A coupling layer of LiF is inserted to separate the magnetized layers from the semiconductor. 'ALQ3 is an organic semiconductor material,' said Lauter. 'Normally in these systems a first magnetic layer is grown on a hard substrate so that one can get the controlled magnetic parameters. Then you grow the organic semiconductor layer, followed by another magnetic material layer, such as cobalt.' In addition to determining the effect of the LiF layers on the efficiency of the electron injection, the researchers wanted to determine the magnetic properties of the cobalt and Ni{sub 80}Fe{sub 20} as well as the interfacial properties: whether there is interdiffusion of cobalt through the LiF layer to the semiconductor, for example. The researchers used polarized neutrons at beam line 4A to probe the entire, layer-by-layer assembly of the system. 'Reflectometry with polarized neutrons is a perfect method to study thin magnetic films,' Lauter said. 'These thin films - if you put one on a substrate, you see it just like a mirror. However, this mirror has a very complicated internal multilayer structure. The neutrons look inside this complicated structure and characterize each and every interface. Due to the depth sensitivity of the method, we measure the structural and magnetic properties of each layer with the resolution of 0.5 nm. The neutron scattering results found that inserting LiF as a barrier significantly improves the quality of the interface, increasing the injection of electrons from the magnetic layer through the organic semiconductor in the spin valve and enhancing the overall properties of the system. In related work the magneti

Bardoel, Agatha A [ORNL; Lauter, Valeria [ORNL; Szulczewski, Greg J [ORNL

2012-01-01T23:59:59.000Z

171

Leading neutron spectra  

E-Print Network [OSTI]

It is shown that the observation of the spectra of leading neutrons from proton beams can be a good probe of absorptive and migration effects. We quantify how these effects modify the Reggeized pion-exchange description of the measurements of leading neutrons at HERA. We are able to obtain a satisfactory description of all the features of these data. We also briefly discuss the corresponding data for leading baryons produced in hadron-hadron collisions.

A. B. Kaidalov; V. A. Khoze; A. D. Martin; M. G. Ryskin

2006-02-23T23:59:59.000Z

172

Wear and wear mechanism simulation of heavy-duty engine intake valve and seat inserts  

SciTech Connect (OSTI)

A silicon-chromium alloy frequently used for heavy-duty diesel engine intake valves was tested against eight different insert materials with a valve seat wear simulator. Wear resistance of these combinations was ranked. For each test, the valve seat temperature was controlled at approximately 510 C, the number of cycles was 864,000 (or 24 h), and the test load was 17,640 N. The combination of the silicon-chromium valve against a cast iron insert produced in the least valve seat wear, whereas a cobalt-base alloy insert produced the highest valve seat wear. In the overall valve seat recession ranking, however, the combination of the silicon-chromium valve and an iron-base chromium-nickel alloy insert had the least total seat recession, whereas the silicon-chromium valve against cobalt-base alloy, cast iron, and nickel-base alloy inserts had significant seat recession. Hardness and microstructure compatibility of valve and insert materials are believed to be significant factors in reducing valve and insert wear. The test results indicate that the mechanisms of valve seat and insert wear are a complex combination of adhesion and plastic deformation. Adhesion was confirmed by material transfer, while plastic deformation was verified by shear strain (or radial flow) and abrasion. The oxide films formed during testing also played a significant role. The prevented direct metal-to-metal contact and reduced the coefficient of friction on seat surfaces, thereby reducing adhesive and deformation-controlled wear.

Wang, Y.S.; Narasimhan, S.; Larson, J.M.; Schaefer, S.K. [Eaton Corp., Marshall, MI (United States). Engine Components Operations] [Eaton Corp., Marshall, MI (United States). Engine Components Operations

1998-02-01T23:59:59.000Z

173

Worcester 1 Inch Solenoid Actuated Gas Operated VPS System Ball Valve  

SciTech Connect (OSTI)

1 inch Gas-operated full-pod ball valve incorporates a solenoid and limit switches as integral park of the actuator. The valve is normally open and fails safe to the closed position. The associated valve position switch is class GS.

MISKA, C.R.

2000-11-13T23:59:59.000Z

174

Air-flow regulation system for a coal gasifier  

DOE Patents [OSTI]

An improved air-flow regulator for a fixed-bed coal gasifier is provided which allows close air-flow regulation from a compressor source even though the pressure variations are too rapid for a single primary control loop to respond. The improved system includes a primary controller to control a valve in the main (large) air supply line to regulate large slow changes in flow. A secondary controller is used to control a smaller, faster acting valve in a secondary (small) air supply line parallel to the main line valve to regulate rapid cyclic deviations in air flow. A low-pass filter with a time constant of from 20 to 50 seconds couples the output of the secondary controller to the input of the primary controller so that the primary controller only responds to slow changes in the air-flow rate, the faster, cyclic deviations in flow rate sensed and corrected by the secondary controller loop do not reach the primary controller due to the high frequency rejection provided by the filter. This control arrangement provides at least a factor of 5 improvement in air-flow regulation for a coal gasifier in which air is supplied by a reciprocating compressor through a surge tank.

Fasching, George E. (Morgantown, WV)

1984-01-01T23:59:59.000Z

175

Pumps, pipes and valves: The heart of a system  

SciTech Connect (OSTI)

This is a guide to suppliers of pumps, pipes and valves for construction or repair of hazardous materials. The article contains a compilation of the suppliers/manufacturers and how to contact them, the corrosion resistance of the component, whether double-secondary containment is available, and the material used to construct the component.

NONE

1996-05-01T23:59:59.000Z

176

Covered Product Category: Pre-Rinse Spray Valves  

Broader source: Energy.gov [DOE]

The Federal Energy Management Program (FEMP) provides acquisition guidance and Federal efficiency requirements across a variety of product categories, including pre-rinse spray valves, which are a FEMP-designated product category. Federal laws and requirements mandate that agencies meet these efficiency requirements in all procurement and acquisition actions that are not specifically exempted by law.

177

ON CONDITION MONITORING OF EXHAUST VALVES IN MARINE DIESEL ENGINES  

E-Print Network [OSTI]

is to seal during the compression stroke, thereby providing maximum #12; combustion pressure for maximum seat and thereby provide scavenge (from scavenge air system) of the polluted air in the cylinder and fresh air intake for the following compression and combustion. Valve burn­through, or leakage, can

Mosegaard, Klaus

178

Plastic-lined valves are virtually trouble-free in caustic, acid pipelines  

SciTech Connect (OSTI)

Chevron renovated the naphthenic acid plant, part of the Pascagoula, Mississippi Refinery of Chevron U.S.A. Inc., in mid-1979. They installed plastic-lined valves in the caustic and acid water piping systems. The valves combine the excellent sealing characteristics of a plug valve with the minimal rotary contact surface and low pressure drop of a butterfly valve. The valve has a molded-in-place PTFE liner resistant to abrasives and corrosives at temperatures of 450/sup 0/F, and is rated for pressures from full vacuum to 150 psi.

Not Available

1983-02-01T23:59:59.000Z

179

Spin-dependent thermal and electrical transport in a spin-valve system  

SciTech Connect (OSTI)

Within the framework of Bu{close_quotes}ttiker{close_quote}s gauge invariant and charge conservation dc transport theory, the spin-dependent thermal and electrical transport in a ferromagnet-insulator-ferromagnet tunnel junction is investigated at finite bias voltage and finite temperature. It is observed that the relative orientations of magnetizations in the two ferromagnetic (FM) electrodes as well as temperature have remarkable effects on the differential conductance, thermopower, Peltier effect, and thermal conductivity. At low temperature the quantum resonant tunneling is predominant, leading to the deviation of classical transport theory, while the transport of electrons are crucially governed by thermal processes at high temperature. The so-called spin-valve phenomenon is clearly uncovered for both the differential conductance and the thermal conductivity at low temperature. The Wiedemann-Franz law is examined, and the inelastic tunneling spectroscopy is also discussed. Our findings are expected to be measured in the near future.

Wang, Zheng-Chuan; Su, Gang; Gao, Song

2001-06-01T23:59:59.000Z

180

Nondestructive evaluation of silicon-nitride ceramic valves from engine duration test.  

SciTech Connect (OSTI)

In this study, we investigated impact and wear damage in silicon-nitride ceramic valves that were subjected to an engine duration test in a natural-gas engine. A high-speed automated laser-scattering system was developed for the nondestructive evaluation (NDE) of 10 SN235P silicon-nitride valves. The NDE system scans the entire valve surface and generates a two-dimensional scattering image that is used to identify location, size and relative severity of subsurface damage in the valves. NED imaging data were obtained at before and at 100 and 500 hours of the engine duration test. The NDE data were analyzed and compared with surface photomicrographs. Wear damage was found in the impact surface of all valves, expecially for exhaust valves. However, the NDE examination did not detect subsurface damage such as cracks or spalls in these engine-tested valves.

Sun, J. G.; Trethewey, J. S.; Vanderspiegle, N. N.; Jensen, J. A.; Nuclear Engineering Division; Caterpillar, Inc.

2008-01-01T23:59:59.000Z

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


181

Site Lead TQP Standard  

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

Qualification Standard for the Qualification Standard for the Office of Safety and Emergency Management Evaluations Site Lead Program May 2011 Office of Enforcement and Oversight Office of Health, Safety and Security U.S. Department of Energy 1 Qualification Standard for the Office of Safety and Emergency Management Evaluations Site Lead Program A Site Lead is an individual, normally at a senior General Schedule (GS) level or Excepted Service, who is assigned the responsibility to assess and evaluate management systems, safety and health programs, and technical activities associated with U.S. Department of Energy (DOE) nuclear and non-nuclear facilities. Typically, a Site Lead has previously qualified as a Nuclear Safety Specialist or a Senior Technical Safety Manager. For exceptionally qualified individuals,

182

Physics-based simulation of the impact of demand response on lead-acid emergency power availability in a datacenter  

Science Journals Connector (OSTI)

Abstract This paper uses a one-dimensional, physics-based model of a valve-regulated lead-acid (VRLA) battery to examine the impact of demand response on uninterruptible power supply (UPS) availability in a datacenter. Datacenters are facilities that provide services such as cloud computing, web search, etc. They are also large electricity consumers. An energy-efficient 15 MW datacenter, for instance, may pay $1 m per month for electricity. Datacenters often utilize VRLA batteries to ensure high reliability in serving their computational demand. This motivates the paper's central question: to what extent does the use of datacenter UPS batteries for demand response affect their availability for their primary purpose (namely, emergency power)? We address this question using a physics-based model of the coupled diffusion-reaction dynamics of VRLA batteries. We discretize this model using finite differences, and simulate it for different datacenter battery pack sizes. The results show that for a typical datacenter power demand profile, a VRLA battery pack sized for UPS functionality can provide demand response with only a minimal loss of UPS availability.

A. Mamun; D. Wang; I. Narayanan; A. Sivasubramaniam; H.K. Fathy

2015-01-01T23:59:59.000Z

183

Removable check valve for use in a nuclear reactor  

DOE Patents [OSTI]

A removable check valve for interconnecting the discharge duct of a pump and an inlet coolant duct of a reactor core in a pool-type nuclear reactor. A manifold assembly is provided having an outer periphery affixed to and in fluid communication with the discharge duct of the pump and has an inner periphery having at least one opening therethrough. A housing containing a check valve is located within the inner periphery of the manifold. The upper end of the housing has an opening in alignment with the opening in the manifold assembly, and seals are provided above and below the openings. The lower end of the housing is adapted for fluid communication with the inlet duct of the reactor core.

Dunn, Charlton (Calabasas, CA); Gutzmann, Edward A. (Simi Valley, CA)

1988-01-01T23:59:59.000Z

184

Grant Reference Lead / Sole  

E-Print Network [OSTI]

Rank Overall Score Grant Reference Lead / Sole Grant Grant Holder Research Organisation Project sediment-concentration and velocity data for submarine turbidity currents Standard Grant DEC12 1 9 NE-concentration and velocity data for submarine turbidity currents Standard Grant DEC12 2 8 NE/K015184/1 Y Alistair Pike

185

Upgrade of the Gas Flow Control System of the Resistive Current Leads of the LHC Inner Triplet Magnets: Simulation and Experimental Validation  

E-Print Network [OSTI]

The 600 A and 120 A circuits of the inner triplet magnets of the Large Hadron Collider are powered by resistive gas cooled current leads. The current solution for controlling the gas flow of these leads has shown severe operability limitations. In order to allow a more precise and more reliable control of the cooling gas flow, new flowmeters will be installed during the first long shutdown of the LHC. Because of the high level of radiation in the area next to the current leads, the flowmeters will be installed in shielded areas located up to 50 m away from the current leads. The control valves being located next to the current leads, this configuration leads to long piping between the valves and the flowmeters. In order to determine its dynamic behaviour, the proposed system was simulated with a numerical model and validated with experimental measurements performed on a dedicated test bench.

Perin, A; Casas-Cubillos, J; Pezzetti, M

2014-01-01T23:59:59.000Z

186

A WEAR MODEL FOR DIESEL ENGINE EXHAUST VALVES  

SciTech Connect (OSTI)

The work summarized here comprises the concluding effort of a multi-year project, funded by the U.S. Department of Energy, Office of Vehicle Technologies. It supports the development of a better understanding of advanced diesel engine designs in which enhanced power density, energy efficiency, and emissions control place increasing demands upon the durability of engine materials. Many kinds of metallic alloys are used in engines depending on the operating stresses, temperatures, and chemical environments. Exhaust valves, for example, are subjected to high temperatures and repetitive surface contacts that place demands on durability and frictional characteristics of the materials. Valves must continue to seal the combustion chamber properly for thousands of hours of cyclic engine operation and under varying operating conditions. It was the focus of this effort to understand the wear processes in the valve-seat area and to develop a model for the surface deformation and wear of that important interface. An annotated bibliography is provided to illustrate efforts to understand valve wear and to investigate the factors of engine operation that affect its severity and physical manifestation. The project for which this modeling effort was the final task, involved construction of a high-temperature repetitive impact test system as well as basic tribology studies of the combined processes of mechanical wear plus oxidation at elevated temperatures. Several publications resulted from this work, and are cited in this report. The materials selected for the experimental work were high-performance alloys based on nickel and cobalt. In some cases, engine-tested exhaust valves were made available for wear analysis and to ensure that the modes of surface damage produced in experiments were simulative of service. New, production-grade exhaust valves were also used to prepare test specimens for experimental work along with the other alloy samples. Wear analysis of valves and seats run for hundreds of hours in heavy-duty diesels provided insights into the kinds of complexity that the contact conditions in engines can produce, and suggested the physical basis for the current approach to modeling. The model presented here involves four terms, two representing the valve response and two for its mating seat material. The model's structure assumes that wear that takes place under a complex combination of plastic deformation, tangential shear, and oxidation. Tribolayers form, are removed, and may reform. Layer formation affects the friction forces in the interface, and in turn, the energy available to do work on the materials to cause wear. To provide friction data for the model at various temperatures, sliding contact experiments were conducted from 22 to 850 C in a pin-on-disk apparatus at ORNL. In order to account for the behavior of different materials and engine designs, parameters in all four terms of the model can be adjusted to account for wear-in and incubation periods before the dominant wear processes evolve to their steady-state rates. For example, the deformation rate is assumed to be maximum during the early stages of operation, and then, due to material work-hardening and the increase in nominal contact area (which reduces the load per unit area), decreases to a lower rate at long times. Conversely, the rate of abrasion increases with time or number of cycles due to the build-up of oxides and tribo-layers between contact surfaces. The competition between deformation and abrasion results in complex, non-linear behavior of material loss per cycle of operation. Furthermore, these factors are affected by valve design features, such as the angle of incline of the valve seat. Several modeling scenarios are presented to demonstrate how the wear profile versus number of cycles changes in response to: (a) different relative abrasion rates of the seat and valve materials, (b) the friction coefficient as a function of temperature, (c) the relative deformation contribution of valve and seat materials, and (d) an interruption in the dominant we

Blau, Peter Julian [ORNL

2009-11-01T23:59:59.000Z

187

Technology Reinvestment Program/Advanced ``Zero Emission'' Control Valve (Phase II)  

SciTech Connect (OSTI)

The objectives of this effort are to determine, develop and demonstrate the feasibility of significantly reducing the cost and expanding the applications for a family of Advanced Zero Emissions Control Valves that meets the fugitive emissions requirements of the 1990 Amendments to the Clean Air Act. This program is a direct technology spin-off from the valve technology that is critical to the US Navy's Nuclear Powered Fleet. These zero emissions valves will allow the Hydrocarbon and Chemical Processing Industries, etc., to maintain their competitiveness and still meet environmental and safety requirements. Phase 2 is directed at refining the basic technologies developed during Phase 1 so that they can be more readily selected and utilized by the target market. In addition to various necessary certifications, the project will develop a full featured digital controller with ``smart valve'' growth capability, expanding valve sizes/applications and identifying valve materials to permit applications in severe operational environments.

J. Napoleon

1998-12-01T23:59:59.000Z

188

Computations of high-pressure steam flow in the turbine bypass valve  

SciTech Connect (OSTI)

The objective of the present study is to investigate the steam flow behavior through the high-pressure turbine bypass valve. Efforts have mainly been directed at investigating the process of steam flow and property variations aforementioned bypass valve as well as to obtain correlations between the flow rate and the valve opening ratio. Modeling of the high-pressure turbulent steam flow was performed on a three-dimensional non-staggered grid system by employing the finite volume method and by solving the three-dimensional, turbulent, compressible Navier-Stokes, and energy equations. Through this research, numerous data have been acquired and analyzed. These efforts enable one to obtain a correlation data set for the valve opening versus flow rate coefficient of the valve. One of the significant accomplishments is to use the model presented here to further improve a design of a turbine bypass flow valve.

Amano, R.S.; Draxler, G.R.

1999-07-01T23:59:59.000Z

189

Development of a thyristor valve for next generation 500kV HVDC transmission systems  

SciTech Connect (OSTI)

A high voltage thyristor valve is the basic component of an HVDC transmission system. Development of a 500kV valve for next generation HVDC transmission systems is described. First, the power loss of the valve is analyzed to decide a reasonable wafer size for the light triggered thyristor. From these results, a six inch diameter wafer size is selected. The light triggered thyristor, with ratings of 8kV and 3.5kA, is developed using the six inch wafer. The designing of the valve employing the thyristor and test results with the prototype valve prove that a 500kV valve can be realized by the design method.

Hasegawa, T. [Kansai Electric Power Co., Inc., Osaka (Japan)] [Kansai Electric Power Co., Inc., Osaka (Japan); Yamaji, K. [Shikoku Electric Power Co., Inc., Takamatsu (Japan)] [Shikoku Electric Power Co., Inc., Takamatsu (Japan); Irokawa, H. [Electric Power Development Co., Ltd., Tokyo (Japan)] [Electric Power Development Co., Ltd., Tokyo (Japan); Shirahama, H.; Tanaka, C.; Akabane, K.

1996-10-01T23:59:59.000Z

190

Failure Modes and Causes for Swing and Lift Type Check Valves  

Office of Scientific and Technical Information (OSTI)

Prior to the recent work performed by Oak Ridge National Laboratory (ORNL) relative to nuclear industry check valve performance, no information was readily available regarding the...

191

E-Print Network 3.0 - aortic valve sclerosis Sample Search Results  

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

aortic valve disease... 21 ... Source: Simmons, Craig A. - Department of Mechanical and Industrial Engineering, University of Toronto Collection: Engineering ; Biology and...

192

NUPRO process vent/MCO check valve - prevent backflow from process vent into MCO  

SciTech Connect (OSTI)

NUPRO process vent/MCO check valve - prevent backflow from process vent into MCO CGI-SNF-D-30-3-P4-040.

VAN KATWIJK, C.

1999-07-01T23:59:59.000Z

193

E-Print Network 3.0 - aortic valve surgery Sample Search Results  

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

Medicine ; Chemistry 2 A Computational Model of Aging and Calcification in the Aortic Heart Valve Summary: A Computational Model of Aging and Calcification in the Aortic Heart...

194

E-Print Network 3.0 - aortic valve calcium Sample Search Results  

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

; Biology and Medicine 2 Inhibition of aortic wall calcification in bioprosthetic heart valves by ethanol pretreatment: Biochemical and Summary: Inhibition of aortic wall...

195

E-Print Network 3.0 - active infective valve Sample Search Results  

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

Summary: Non-invasive assessment of leaflet deformation and mechanical properties in heart valve tissue... -invasive assessment of leaflet deformation and mechanical properties...

196

E-Print Network 3.0 - ahmed valve implantation Sample Search...  

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

Collection: Engineering ; Materials Science ; Biology and Medicine 3 Insertion of Heart Valves by Catheterization Design Team Summary: procedure for surgeons to implant heart...

197

E-Print Network 3.0 - autologous pulmonary valves Sample Search...  

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

Ecole Polytechnique, Centre de mathmatiques Collection: Mathematics 2 Autologous Heart Valve Tissue Engineering CIP-DATA LIBRARY TECHNISCHE UNIVERSITEIT EINDHOVEN Summary:...

198

E-Print Network 3.0 - aortic valve implantation Sample Search...  

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

and Medicine ; Chemistry 3 Inhibition of aortic wall calcification in bioprosthetic heart valves by ethanol pretreatment: Biochemical and Summary: , Comparison of...

199

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

DOE Patents [OSTI]

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

Wright, K.E.

1994-08-23T23:59:59.000Z

200

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

DOE Patents [OSTI]

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

Wright, Kenneth E. (Yardley, PA)

1994-01-01T23:59:59.000Z

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


201

Development and modification of a single overhead camshaft 4-valve 4-stroke 135 cc formula varsity race car engine  

Science Journals Connector (OSTI)

The engine that was chosen to be developed and modified is Yamaha LC 135 Single Overhead Camshaft (SOHC) 4-valve 4-stroke 135cc liquid-cooled engine. The engine selection is based on the specification, rule and regulation in UTeM Formula Varsity 2012 (FV 2012). The engine performance is determined by engine operating characteristics. The engine air flow affects the filtration, intake and exhaust systems. The heat from the engine rejected to the surrounding through the active cooling system which has radiator and fan. The selection of the engine is based on weighted decision matrix which consists of reliability, operating and maintenance cost, fuel consumption and weight. The score of the matrix is formulated based on relative weighted factor among the selections. It been compared between Yamaha LC 135 Single Overhead Camshaft (SOHC) 4-valve 4-stroke 135cc liquid-cooled engine, Honda Wave 125 X Air Cooled, 4 Cycle Engine Overhead Camshaft (OHC) and Suzuki Shogun RR 4 stroke air cooled Single Overhead Camshaft (SOHC). The modification is applied to the engine through the simulation and tuning of Capacitor Discharge Ignition (CDI).

M A Abdullah; N Tamaldin; H Rusnandi; T Manoharan; M A Samsir

2013-01-01T23:59:59.000Z

202

Surface damage on the mating interior and exterior pistons used in a marine exhaust valve  

Science Journals Connector (OSTI)

Abstract The wear damage occurred on the two mating pistons, interior piston and exterior piston used for a marine exhaust valve. Visual and SEM observations indicate that the heavy wear marks and wear strips with flaky spalling occurred on the contact surfaces of both pistons. The primary failure mode is the adhesive wear accompanied by little fatigue wear. Metallurgical observations reveal that a white etching layer (WEL) is presented beneath the seriously worn surfaces. XRD analysis indicates that the amount of austenite on the unworn or the lightly worn surfaces of both pistons is in a high level. During operation, the metastable austenite would transform to the martensite under the friction stress, which results in a volume expansion. The clearance between mating pistons would become small to make the friction force on the contact surfaces increase. And the increased friction force induced the concentrated frictional heating. Inadequate lubrication oil cannot bring frictional energy away in time so that the located surface temperature would exceed critical temperature (Ac3). This temperature rise is high enough for austenitization and under such high temperature, the instantaneous hardness of located contact surfaces is low to lead to the occurrence of adhesion wear. Subsequent ? ? ?? transformation would occur as the bulk of the piston rapidly conducts heat away from the piston surfaces to form a WEL on the seriously worn surface. The micro-crack formation inside the WEL and subsequent propagating would lead to the occurrence of spalling.

Zhi-wei Yu; Xiao-lei Xu; Xing-jun Niu; Tao Cai

2013-01-01T23:59:59.000Z

203

Get the Lead Out! | EMSL  

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

Lead Out Get the Lead Out Bioremediation research vies to eliminate subsurface heavy metal hazard Heavy metal contamination of subsurface soils, groundwater and surface water is...

204

Environmental lead: insidious health problem  

Science Journals Connector (OSTI)

Environmental lead: insidious health problem ... Several federal programs aim to reduce human exposure to lead, but which source is most dangerous is subject of growing controversy ...

LOIS R. EMBER; C&EN; WASHINGTON

1980-06-23T23:59:59.000Z

205

Flexible, reusable fiberglass insulation tailored to fit valves, heat exchangers  

SciTech Connect (OSTI)

About 120,000 bbl/day of crude oil are refined into gasoline at the Marathon Petroleum refinery in Robinson, IL. Built in the early part of the century, the Robinson refinery has been continually updated and modernized in response to improving technology. To control heat loss on some of the unusually shaped and previously uninsulated process equipment, Marathon engineering personnel initiated a program to systematically evaluate and insulate these pieces of equipment. Primarily, over 500 valves and heat exchanger heads were losing heat which had been estimated to cost hundreds of thousands of dollars per year. The plant performed on-site evaluations of several types of removable insulation covers. The primary differences and deciding factors were in construction detail - particularly in the fasteners. Marathon chose lace-up fastening insulation covers because plant evaluation found them to be the best. Also the manufacturer agreed to provide tailor-made covers for all of the valves and heat exchanger heads. Service from the manufacturer through an insulation contractor located in Robinson was also a plus. The local contractor, working in conjunction with the manufacturer, conducted an in-plant survey that confirmed the already mentioned heat loss cost in the $100,000s range. It was also determined that an equipment temperature somewhere between 150 and 200/sup 0/F was the lowest temperature at which to economically install insulation. Marathon has been pleased with the performance of the insulation covers which reduce heat loss and, as an incidental benefit, provide personnel safety from hot surfaces. An important benefit has been the removability and reusability of the insulation, particularly advantageous on valves and heat exchangers the require frequent access.

Gockenbach, L.G.; Singleton, D.; Toy, D.A.

1986-06-01T23:59:59.000Z

206

Adaptive Robust Control of Programmable Valves with Manufacturer Supplied Flow Mapping Only  

E-Print Network [OSTI]

and final tracking accuracy. In addition, real-time adaptation is used to reduce the degree of modelling-in and meter-out orifices [2], [3], [4] through valves number 1,2 and 4,5; and ii) enabling the precise control is the significant modelling error. The cartridge valves are of fast response and low cost but low accuracy

Yao, Bin

207

System for detecting operating errors in a variable valve timing engine using pressure sensors  

DOE Patents [OSTI]

A method and control module includes a pressure sensor data comparison module that compares measured pressure volume signal segments to ideal pressure volume segments. A valve actuation hardware remedy module performs a hardware remedy in response to comparing the measured pressure volume signal segments to the ideal pressure volume segments when a valve actuation hardware failure is detected.

Wiles, Matthew A.; Marriot, Craig D

2013-07-02T23:59:59.000Z

208

Potential Viability of a Fast-Acting Micro-Solenoid Valve for Pulsed Detonation Fuel Injection  

E-Print Network [OSTI]

current (A) k spring constant (kg/s2 ) Ll flux leakage inductance (H) L(, x) non-linear coil inductance (H-load conditions, indicating the ability of spring- return micro-valves to function reliably at high frequencies) m mass of movable valve core and spring assembly (kg) n integer number of successive (positive

Texas at Arlington, University of

209

MOTION PLANNING CONTROL OF THE AIRPATH OF AN S.I. ENGINE WITH VALVE  

E-Print Network [OSTI]

MOTION PLANNING CONTROL OF THE AIRPATH OF AN S.I. ENGINE WITH VALVE TIMING ACTUATORS T. Leroy , J, France Abstract: We address the control of the airpath of a turbocharged S.I. engine equipped with Variable Valve Timing actuators (VVT). Compared to standard configurations, the engine does not possess any

210

Journal of Biomechanics 34 (2001) 12791289 A nonlinear anisotropic model for porcine aortic heart valves  

E-Print Network [OSTI]

Journal of Biomechanics 34 (2001) 1279­1289 A nonlinear anisotropic model for porcine aortic heart finite element model for porcine heart valves. The model is based on the uniaxial experimental data of porcine aortic heart valve leaflet and the properties of nonlinear composite material. A finite element

Luo, Xiaoyu

211

Microfluidic very large scale integration (mVLSI) with integrated micromechanical valves{  

E-Print Network [OSTI]

Microfluidic very large scale integration (mVLSI) with integrated micromechanical valves{ Ismail40258k Microfluidic chips with a high density of control elements are required to improve device and accessible high-density microfluidic chips, we have fabricated a monolithic PDMS valve architecture

Quake, Stephen R.

212

ESTIMATION OF EXHAUST MANIFOLD PRESSURE IN TURBOCHARGED GASOLINE ENGINES WITH VARIABLE VALVE TIMING  

E-Print Network [OSTI]

ESTIMATION OF EXHAUST MANIFOLD PRESSURE IN TURBOCHARGED GASOLINE ENGINES WITH VARIABLE VALVE TIMING in turbocharged gasoline engines with variable valve timing requires knowledge of exhaust mani- fold pressure, Pe control systems for gasoline engines rely heavily on feedforward air-fuel ratio (A/F) control to meet

Grizzle, Jessy W.

213

The superconducting spin valve and triplet superconductivity I.A. Garifullin a,n  

E-Print Network [OSTI]

The superconducting spin valve and triplet superconductivity I.A. Garifullin a,n , P.V. Leksin s t r a c t A review of our recent results on the spin valve effect is presented. We have used coefficient DF and the exchange splitting I of the conduction band in the F layer [1]. For pure Fe the value

Fominov, Yakov

214

Proceedings of the 2nd symposium on valves for coal conversion and utilization  

SciTech Connect (OSTI)

The 2nd symposium on valves for coal conversion and utilization was held October 15 to 17, 1980. It was sponsored by the US Department of Energy, Morgantown Energy Technology Center, in cooperation with the Valve Manufacturers Association. Seventeen papers have been entered individually into EDB and ERA. (LTN)

Maxfield, D.A. (ed.)

1981-01-01T23:59:59.000Z

215

Memory effect and temperature behavior in spin valves with and without antiferromagnetic subsystems  

E-Print Network [OSTI]

Memory effect and temperature behavior in spin valves with and without antiferromagnetic subsystems Temperature behavior and memory effect in standard spin valves SV and SVs with synthetic antiferromagnetic Co/Ru/Co SV-SAF subsystems have been studied. SV-SAFs show much better temperature stability. Memory effect

Xiao, John Q.

216

Optimized regulator for the quantized anharmonic oscillator  

E-Print Network [OSTI]

The energy gap between the first excited state and the ground state is calculated for the quantized anharmonic oscillator in the framework of the functional renormalization group method. The compactly supported smooth regulator is used which includes various types of regulators as limiting cases. It was found that the value of the energy gap depends on the regulator parameters. We argue that the optimization based on the disappearance of the false, broken symmetric phase of the model leads to the Litim's regulator. The least sensitivity on the regulator parameters leads however to an IR regulator being somewhat different of the Litim's one, but it can be described as a perturbatively improved, or generalized Litim's regulator and provides analytic evolution equations, too.

J. Kovacs; S. Nagy; K. Sailer

2014-03-14T23:59:59.000Z

217

Hydraulically actuated fuel injector including a pilot operated spool valve assembly and hydraulic system using same  

DOE Patents [OSTI]

The present invention relates to hydraulic systems including hydraulically actuated fuel injectors that have a pilot operated spool valve assembly. One class of hydraulically actuated fuel injectors includes a solenoid driven pilot valve that controls the initiation of the injection event. However, during cold start conditions, hydraulic fluid, typically engine lubricating oil, is particularly viscous and is often difficult to displace through the relatively small drain path that is defined past the pilot valve member. Because the spool valve typically responds slower than expected during cold start due to the difficulty in displacing the relatively viscous oil, accurate start of injection timing can be difficult to achieve. There also exists a greater difficulty in reaching the higher end of the cold operating speed range. Therefore, the present invention utilizes a fluid evacuation valve to aid in displacement of the relatively viscous oil during cold start conditions.

Shafer, Scott F. (Morton, IL)

2002-01-01T23:59:59.000Z

218

Two-phase flow characteristics in multiple orifice valves  

SciTech Connect (OSTI)

This work presents an experimental investigation on the characteristics of two-phase flow through multiple orifice valve (MOV), including frictional pressure drop and void fraction. Experiments were carried out using an MOV with three different sets of discs with throat thickness-diameter ratios (s/d) of 1.41, 1.66 and 2.21. Tests were run with air and water flow rates ranging between 1.0 and 3.0 m{sup 3}/h, respectively. The two-phase flow patterns established for the experiment were bubbly and slug. Two-phase frictional multipliers, frictional pressure drop and void fraction were analyzed. The determined two-phase multipliers were compared against existing correlations for gas-liquid flows. None of the correlations tested proved capable of predicting the experimental results. The large discrepancy between predicted and measured values points at the role played by valve throat geometry and thickness-diameter ratio in the hydrodynamics of two-phase flow through MOVs. A modification to the constants in the two-phase multiplier equation used for pipe flow fitted the experimental data. A comparison between computed frictional pressure drop, calculated with the modified two-phase multiplier equation and measured pressure drop yielded better agreement, with less than 20% error. (author)

Alimonti, Claudio [Sapienza University of Rome, Department ICMA, Via Eudossiana 18, 00184 Roma (Italy); Falcone, Gioia; Bello, Oladele [The Harold Vance Department of Petroleum Engineering, Texas A and M University, 3116 TAMU, Richardson Building, College Station, TX 77843 (United States)

2010-11-15T23:59:59.000Z

219

Fluid-driven reciprocating apparatus and valving for controlling same  

DOE Patents [OSTI]

A control valve assembly for alternately actuating a pair of fluid-driven free-piston devices by using fluid pressure communication therebetween. Each control valve is switched by a pressure signal depending on the state of its counterpart's piston. The communication logic is arranged to provide overlap of the forward strokes of the pistons, so that at least one of the pair will always be pressurized. Thus, uninterrupted pumping of liquid is made possible from a pair of free-piston pumps. In addition, the speed and frequency of piston stroking is entirely dependent on the mechanical power load applied. In the case of a pair of pumps, this enables liquid delivery at a substantially constant pressure over the full range of flow rates, from zero to maximum flow. One embodiment of the invention utilized two pairs of fluid-driven free-piston devices whereby a bipropellant liquid propulsion system may be operated, so as to provide continuous flow of both fuel and oxidizer liquids when used in rocket applications, for example.

Whitehead, John C. (Davis, CA); Toews, Hans G. (East Aurora, NY)

1993-01-01T23:59:59.000Z

220

Interdiffusion in CoFeCu multilayers and its application to spin-valve structures for data storage  

E-Print Network [OSTI]

, the interdiffusion coefficients for all layers in the spin valve have to be determined. For diffusion drivenInterdiffusion in CoFeÃ?Cu multilayers and its application to spin-valve structures for data storage, Pennsylvania 15213-3890 Received 13 February 2003; accepted 30 April 2003 Spin-valve structures might

Laughlin, David E.

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


221

IEEE TRANSACTIONS ON CONTROL SYSTEMS TECHNOLOGY, VOL. 15, NO. 6, NOVEMBER 2007 1065 Robust Optimal Design of Unstable Valves  

E-Print Network [OSTI]

and outer radii of the valve chamber; and 3) the nonmetering orifice momentum flux coefficient which Design of Unstable Valves QingHui Yuan, Member, IEEE, and Perry Y. Li, Member, IEEE Abstract--This paper of electrohydraulic valves. Currently, limitations of solenoid actua- tors have prevented single stage

Li, Perry Y.

222

Flow Characteristics Analysis of Widows' Creek Type Control Valve for Steam Turbine Control  

SciTech Connect (OSTI)

The steam turbine converts the kinetic energy of steam to mechanical energy of rotor blades in the power conversion system of fossil and nuclear power plants. The electric output from the generator of which the rotor is coupled with that of the steam turbine depends on the rotation velocity of the steam turbine bucket. The rotation velocity is proportional to the mass flow rate of steam entering the steam turbine through valves and nozzles. Thus, it is very important to control the steam mass flow rate for the load following operation of power plants. Among various valves that control the steam turbine, the control valve is most significant. The steam flow rate is determined by the area formed by the stem disk and the seat of the control valve. While the ideal control valve linearly controls the steam mass flow rate with its stem lift, the real control valve has various flow characteristic curves pursuant to the stem lift type. Thus, flow characteristic curves are needed to precisely design the control valves manufactured for the operating conditions of nuclear power plants. OMEGA (Optimized Multidimensional Experiment Geometric Apparatus) was built to experimentally study the flow characteristics of steam flowing inside the control valve. The Widows' Creek type control valve was selected for reference. Air was selected as the working fluid in the OMEGA loop to exclude the condensation effect in this simplified approach. Flow characteristic curves were plotted by calculating the ratio of the measured mass flow rate versus the theoretical mass flow rate of the air. The flow characteristic curves are expected to be utilized to accurately design and operate the control valve for fossil as well as nuclear plants. (authors)

Yoo, Yong H.; Sohn, Myoung S.; Suh, Kune Y. [PHILOSOPHIA, Inc., Seoul National University, San 56-1 Sillim-dong, Gwanak-gu, Seoul, 151-742 (Korea, Republic of)

2006-07-01T23:59:59.000Z

223

Rapid 3D printing of anatomically accurate and mechanically heterogeneous aortic valve hydrogel scaffolds  

Science Journals Connector (OSTI)

The aortic valve exhibits complex three-dimensional (3D) anatomy and heterogeneity essential for the long-term efficient biomechanical function. These are, however, challenging to mimic in de novo engineered living tissue valve strategies. We present a novel simultaneous 3D printing/photocrosslinking technique for rapidly engineering complex, heterogeneous aortic valve scaffolds. Native anatomic and axisymmetric aortic valve geometries (root wall and tri-leaflets) with 12–22 mm inner diameters (ID) were 3D printed with poly-ethylene glycol-diacrylate (PEG-DA) hydrogels (700 or 8000 MW) supplemented with alginate. 3D printing geometric accuracy was quantified and compared using Micro-CT. Porcine aortic valve interstitial cells (PAVIC) seeded scaffolds were cultured for up to 21 days. Results showed that blended PEG-DA scaffolds could achieve over tenfold range in elastic modulus (5.3±0.9 to 74.6±1.5 kPa). 3D printing times for valve conduits with mechanically contrasting hydrogels were optimized to 14 to 45 min, increasing linearly with conduit diameter. Larger printed valves had greater shape fidelity (93.3±2.6, 85.1±2.0 and 73.3±5.2% for 22, 17 and 12 mm ID porcine valves; 89.1±4.0, 84.1±5.6 and 66.6±5.2% for simplified valves). PAVIC seeded scaffolds maintained near 100% viability over 21 days. These results demonstrate that 3D hydrogel printing with controlled photocrosslinking can rapidly fabricate anatomical heterogeneous valve conduits that support cell engraftment.

L A Hockaday; K H Kang; N W Colangelo; P Y C Cheung; B Duan; E Malone; J Wu; L N Girardi; L J Bonassar; H Lipson; C C Chu; J T Butcher

2012-01-01T23:59:59.000Z

224

Valve assembly for use with high temperature and high pressure fluids  

DOE Patents [OSTI]

The valve assembly for use with high temperature and high pressure fluids has inner and outer spaced shells and a valve actuator support of inner and outer spaced members which are connected at their end portions to the inner and outer shells, respectively, to extend substantially normal to the longitudinal axis of the inner shell. A layer of resilient heat insulating material covers the outer surfaces of the inner shell and the inner actuator support member and is of a thickness to only occupy part of the spaces between the inner and outer shells and inner and outer actuator support members. The remaining portion of the space between the inner and outer shells and the space between the inner and outer members is substantially filled with a body of castable, rigid refractory material. A movable valve member is disposed in the inner shell. A valve actuator assembly is supported in the valve actuator support to extend into the inner shell for connection with the movable valve member for movement of the movable valve member to positions from a fully open to a fully closed position to control flow of fluid through the inner shell. An anchor mneans is disposed adjacent opposite sides of the axis of the valve actuator support and attached to the inner shell so that relative radial movement between the inner and outer shell is permitted by the layer of resilient heat insulating material and relative longitudinal movement of the inner shell to the outer shell is permitted in opposite directions from the anchor means to thereby maintain the functional integrity of the movable valve member by providing an area of the inner shell surrounding the movable valve member longitdinally stationary, but at the same time allowing radial movement.

De Feo, Angelo (Totowa, NY)

1982-01-01T23:59:59.000Z

225

Government Regulation  

E-Print Network [OSTI]

Abstract. Interest in the use of so-called voluntary approaches to supplement or replace formal environmental regulation is on the rise, both in Europe and in the United States. These approaches fall into two general ...

Ashford, Nicholas

2005-01-01T23:59:59.000Z

226

RHIC 12x150A current lead temperature controller: design and implementation  

SciTech Connect (OSTI)

There are 60 12 x 150A current leads distributed in six RHIC service buildings; each lead delivers power supply current from room temperature to cryogenic temperature in RHIC. Due to the humid environment, condensation occurs frequently and ice forms quickly during operation, especially during an extensive storage period. These conditions generate warnings and alarms to which personnel must respond and establish temporary solutions to keep the machine operating. In here, we designed a temperature control system to avoid such situations. This paper discusses its design, implementation, and some results. There are six service buildings in the RHIC complex; each building has two valve boxes that transfer room-temperature current cables from the power supplies into superconducting leads, and then transport them into the RHIC tunnel. In there, the transition between the room-temperature lead into superconducting lead is critical and essential; smooth running during the physics store is crucial for the machine's continuing operation. One of the problems that often occurred previously was the icing of these current leads that could result in a potential leakage current onto ground, thereby preventing a continuous supply of physics store. Fig. 1 illustrates a typical example on a power lead. Among the modifications of the design of the valve box, we list below the new requirements for designing the temperature controller to prevent icing occurring: (1) Remotely control, monitor, and record each current lead's temperature in real time. Prevent icing or overheating of a power lead. (2) Include a temperature alarm for the high/low level threshold. In this paper we discuss the design, implementation, upgrades to, and operation of this new system.

Mi, C.; Seberg, S.; Ganetis, Hamdi, K.; Louie, W.; Heppner, G.; Jamilkowski, J.; Bruno, D.; DiLieto, A.; Sirio, C.; Tuozzolo, J.; Sandberg, J.; Unger, K.

2011-03-28T23:59:59.000Z

227

Breakthrough: Lead-free Solder  

SciTech Connect (OSTI)

Ames Laboratory senior metallurgist Iver Anderson explains the importance of lead-free solder in taking hazardous lead out of the environment by eliminating it from discarded computers and electronics that wind up in landfills. Anderson led a team that developed a tin-silver-copper replacement for traditional lead-tin solder that has been adopted by more than 50 companies worldwide.

Anderson, Iver

2012-01-01T23:59:59.000Z

228

Coal slurry letdown valve-concept test phase. Final report  

SciTech Connect (OSTI)

The results of the concept test phase of a novel pressure letdown device indicate usefulness of the concept. The device, using staged letdown, was designed to minimize erosion damage by minimizing slurry velocities through the pressure restrictions. Tests were performed on air, steam/water and a coal slurry with a flashing component. Two valve sizes were used. Based on the results of these tests, the following conclusions were drawn: (1) the basic operating principle of designing for a constant velocity through the orifice restrictions is correct; (2) multiphase pressure letdown can be modeled; (3) temperature profiles are predictable; and (4) erosion in three-phase flow is a complex phenomenon. Recommendations for further work on the device include: (1) development of a controllable device; (2) correlation of further test data; and (3) study of flow regimes where erosion is minimized. 9 refs., 48 figs., 6 tabs.

Collins, E.R. Jr.; Suitor, J.W.

1984-01-01T23:59:59.000Z

229

Thermodynamic Characteristic Study of a High-temperature Flow-rate Control Valve for Fuel Supply of Scramjet Engines  

Science Journals Connector (OSTI)

Thermodynamic characteristics are of great importance for the performance of a high-temperature flow-rate control valve, as high-temperature environment may bring problems, such as blocking of spool and increasing of leakage, to the valve. In this paper, a high-temperature flow-rate control valve, pilot-controlled by a pneumatic servo system is developed to control the fuel supply for scramjet engines. After introducing the construction and working principle, the thermodynamic mathematical models of the valve are built based on the heat transfer methods inside the valve. By using different boundary conditions, different methods of simulations are carried out and compared. The steady-state and transient temperature field distribution inside the valve body are predicted and temperatures at five interested points are measured. By comparing the simulation and experimental results, a reasonable 3D finite element analysis method is suggested to predict the thermodynamic characteristics of the high-temperature flow-rate control valve.

Wen ZENG; Zhizhong TONG; Songjing LI; Hongzhou LI; Liang ZHANG

2012-01-01T23:59:59.000Z

230

ANALYSIS OF SAFETY RELIEF VALVE PROOF TEST DATA TO OPTIMIZE LIFECYCLE MAINTENANCE COSTS  

SciTech Connect (OSTI)

Proof test results were analyzed and compared with a proposed life cycle curve or hazard function and the limit of useful life. Relief valve proof testing procedures, statistical modeling, data collection processes, and time-in-service trends are presented. The resulting analysis of test data allows for the estimation of the PFD. Extended maintenance intervals to the limit of useful life as well as methodologies and practices for improving relief valve performance and reliability are discussed. A generic cost-benefit analysis and an expected life cycle cost reduction concludes that $90 million maintenance dollars might be avoided for a population of 3000 valves over 20 years.

Gross, Robert; Harris, Stephen

2007-08-01T23:59:59.000Z

231

Decontaminating lead bricks and shielding  

SciTech Connect (OSTI)

Lead used for shielding is often surface contaminated with radioisotopes and is therefore a RCRA D008 mixed waste. The technology-based standard for treatment is macroencapsulation. However, decontaminating and recycling the clean lead is a more attractive solution. Los Alamos National Laboratory decontaminates material and equipment contaminated with radioisotopes. Decontaminating lead poses special problems because of the RCRA hazard classification and the size of the inventory, now about 50 tons and likely to grow substantially of planned decommissioning operations. Thus lead, in the form of bricks and other shield shapes, is surface contaminated with fission products. One of the best methods for contaminated lead is removing the superficial layer of contamination with an abrasive medium under pressure. For lead, a mixture of alumina with water and air at about 40 psig rapidly and effectively decontaminates the lead. The abrasive medium is sprayed onto the lead in a scaled-off area. The slurry of abrasive and particles of lead falls through a floor and is collected in a sump. A pump sends the slurry mixture back to the spray gun, creating a continuous process. The process generates small volumes of lead slurry that can be solidified and, because it passes the TCLP, is not a mixed waste. The decontaminated lead can be released for recycling.

Lussiez, G.

1994-02-01T23:59:59.000Z

232

Decontaminating lead bricks and shielding  

SciTech Connect (OSTI)

Lead used for shielding is often surface contaminated with radioisotopes and is therefore a RCRA D008 mixed waste. The technology-based standard for treatment is macroencapsulation. However, decontaminating and recycling the clean lead is a more attractive solution. Los Alamos National Laboratory decontaminates material and equipment contaminated with radioisotopes. Decontaminating lead poses special problems because of the RCRA hazard classification and the size of the inventory, now about 50 tons and likely to grow substantially because of planned decommissioning operations. This lead, in the form of bricks and other shield shapes, is surface contaminated with fission products. One of the best methods for decontaminating lead is removing the thin superficial layer of contamination with an abrasive medium trader pressure. For lead, a mixture of alumina with water and air at about 40 psig rapidly and effectively decontaminates the lead. The abrasive medium is sprayed onto the lead in a sealed-off area. The slurry of abrasive and particles of lead falls through a floor grating and is collected in a sump. A pump sends the slurry mixture back to the spray gun, creating a continuous process. The process generates small volumes of contaminated lead slurry that can be solidified and, because it passes the TCLP, is not a mixed waste. The decontaminated lead can be released for recycling.

Lussiez, G.W.

1993-05-01T23:59:59.000Z

233

Decontaminating lead bricks and shielding  

SciTech Connect (OSTI)

Lead used for shielding is often surface contaminated with radioisotopes and is therefore a RCRA D008 mixed waste. The technology-based standard for treatment is macroencapsulation. However, decontaminating and recycling the clean lead is a more attractive solution. Los Alamos National Laboratory decontaminates material and equipment contaminated with radioisotopes. Decontaminating lead poses special problems because of the RCRA hazard classification and the size of the inventory, now about 50 tons and likely to grow substantially because of planned decommissioning operations. This lead, in the form of bricks and other shield shapes, is surface contaminated with fission products. One of the best methods for decontaminating lead is removing the thin superficial layer of contamination with an abrasive medium trader pressure. For lead, a mixture of alumina with water and air at about 40 psig rapidly and effectively decontaminates the lead. The abrasive medium is sprayed onto the lead in a sealed-off area. The slurry of abrasive and particles of lead falls through a floor grating and is collected in a sump. A pump sends the slurry mixture back to the spray gun, creating a continuous process. The process generates small volumes of contaminated lead slurry that can be solidified and, because it passes the TCLP, is not a mixed waste. The decontaminated lead can be released for recycling.

Lussiez, G.W.

1993-01-01T23:59:59.000Z

234

Fail Save Shut Off Valve for Filtering Systems Employing Candle Filters  

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

Fail Save Shut Off Fail Save Shut Off Valve for Filtering Systems Employing Candle Filters Opportunity The Department of Energy's National Energy Technology Laboratory (NETL) is seeking licensing partners interested in implementing United States Patent Number 6,981,516 entitled "Fail save shut off valve for filtering systems employing candle filters." Disclosed in this patent is a novel fail save shut off valve system that allows fluid flow during normal operational conditions, but prevents the flow of fluids in the event of system failure upstream that causes over- pressurization. It is particularly well suited for use in conjunction with hot gas filtering systems, which utilize ceramic candle filters. Used in such a hot gas system, the fail save valve stops the flow

235

Failure Modes and Causes for Swing and Lift Type Check Valves  

Office of Scientific and Technical Information (OSTI)

HPCI Mainsteam RCIC Suppression Isolation Air Pool Support Figure 2. Relative Failure Rate by System and Valve Type for Significant 191-1996 Failures for the Ten Systems with...

236

Closed-loop, variable-valve-timing control of a controlled-auto-ignition engine  

E-Print Network [OSTI]

The objective of this study was to develop a closed-loop controller for use on a Controlled-Auto- Ignition (CAI) / Spark-Ignition (SI) mixed mode engine equipped with a variable-valve-timing (VVT) mechanism. The controller ...

Matthews, Jeffrey A., 1970-

2004-01-01T23:59:59.000Z

237

HIGH-FREQUENCY MAGNETOCAPACITANCE EFFECT IN ORGANIC SPIN VALVE WITH A  

E-Print Network [OSTI]

HIGH-FREQUENCY MAGNETOCAPACITANCE EFFECT IN ORGANIC SPIN VALVE WITH A 3,4,9,10-PERYLENE Institute of Atomic and Molecular Sciences Academia Sinica, 10617 Taipei, Taiwan *mtlin@phys.ntu

Lin, Minn-Tsong

238

Classification of heart valve single leg separations from acoustic clinical measurements  

SciTech Connect (OSTI)

Our system classifies the condition (intact or single leg separated) of in vivo Bjork-Shiley Convexo-Concave (BSCC) heart valves by processing acoustic measurements of clinical heart valve opening sounds. We use spectral features as inputs to a two-stage classifier, which first classifies individual heart beats, then classifies valves. Performance is measured by probability of detection and probability of false alarm, and by confidence intervals on the probability of correct classification. The novelty of the work lies in the application of advanced techniques to real heart valve data, and extensions of published algorithms that enhance their applicability. We show that even when given a very small number of training samples, the classifier can achieve a probability of correct classification of 100%.

Clark, G.A.; Bowman, B.C.; Boruta, N.; Thomas, G.H.; Jones, H.E.; Buhl, M.R.

1994-05-01T23:59:59.000Z

239

Estimation and Control of Diesel Engine Processes Utilizing Variable Intake Valve Actuation  

Broader source: Energy.gov [DOE]

Air handling system model for multi-cylinder variable geometry turbocharged diesel engine with cooled EGR and flexible intake valve actuation developed to capture dynamic effects of gas exchange actuators

240

E-Print Network 3.0 - aortic valve substitution Sample Search...  

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

<< < 1 2 3 4 5 > >> 1 A Computational Model of Aging and Calcification in the Aortic Heart Valve Summary: A Computational Model of Aging and Calcification in the Aortic Heart...

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


241

E-Print Network 3.0 - aortic valve calcification Sample Search...  

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

<< < 1 2 3 4 5 > >> 1 A Computational Model of Aging and Calcification in the Aortic Heart Valve Summary: A Computational Model of Aging and Calcification in the Aortic Heart...

242

E-Print Network 3.0 - aortic valve replacement Sample Search...  

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

<< < 1 2 3 4 5 > >> 1 A Computational Model of Aging and Calcification in the Aortic Heart Valve Summary: A Computational Model of Aging and Calcification in the Aortic Heart...

243

E-Print Network 3.0 - aortic valve endocarditis Sample Search...  

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

are aortic valve disease, present in 12 to 30 percent of cases, and congenital heart disease... in detection of IE.24 TEE is especially important for patients with aortic...

244

A PDMS membrane microvalve with one-dimensional line valve seat for robust microfluidics  

Science Journals Connector (OSTI)

We have developed a monolithic polydimethylsiloxane (PDMS) membrane microvalve with an isotropically etched valve seat for robust microfluidics. In order to avoid bonding or sticking of the PDMS membrane to the valve seat during the bonding process, the valve seat was wet-etched to be a one-dimensional line instead of a plane. The simple wet-etching technique allowed for the fabrication of an anti-bonding architecture in a scalable manner, and it intrinsically prevented contact between the PDMS membrane and valve seat when no external force was applied (i.e., normally open). This approach enables the permanent device assembly so that the microfluidic chip can be operable in a wide range of fluid pressures (e.g., over 200 kPa) without any leakage and sticking problems.

Chin-Sung Park; Kyu-Youn Hwang; Wonjong Jung; Kak Namkoong; Wonseok Chung; Joon-Ho Kim; Nam Huh

2014-01-01T23:59:59.000Z

245

E-Print Network 3.0 - actuated ball valve Sample Search Results  

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

Xuan-Qi Wang, Howen Mak, and Yu-Chong Tai Summary: valve design to maximize flow rates. Pump 1st Generation The solenoid actuator produced a reciprocating... : Flow Rate vs....

246

Percutaneous aortic valve replacement in a re-animated postmortem heart  

E-Print Network [OSTI]

transcatheter implantation of heart valve prosthesis for thein apex of post-mortem heart (lower view). B C A Figure 5A.descending aorta in lambs. Eur Heart J. 2002;23:1045-49. 5.

White, Jennifer; Sun, Amy; Killien, Lauren; Evangelista, Dennis

2006-01-01T23:59:59.000Z

247

Regulation 28: Library REGULATION 28: LIBRARY  

E-Print Network [OSTI]

Regulation 28: Library 180 REGULATION 28: LIBRARY The purpose of this Regulation is to safeguard the common interests of all Library users. All persons are admitted on the understanding that they have read and agreed to observe the Library Regulations. Breach of this Regulation could result in membership being

Sussex, University of

248

Classification of heart valve sounds from experiments in an anechoic water tank  

SciTech Connect (OSTI)

In vivo studies in both sheep and humans were plagued by a number of problems including movement artifacts, biological noise, low signal-to-noise ratio (SNR), chest-wall reverberation, and limited bandwidth recordings as discussed by [1]. To overcome these problems it was decided to record heart valve sounds under controlled conditions deep in an anechoic water tank, free from reverberation noise. The main goal of this experiment was to obtain measurements of ''pure'' heart valve sounds free of the scattering effects of the body. Experiments were conducted at the Transdec facility in San Diego [2]. We used a high quality hydrophone together with a wide-band data acquisition system [2]. We recorded sounds from 100 repetitions of the opening-closing cycles on each of 50 different heart valves, including 21 SLS valves and 29 intact valves. The power spectrum of the opening and closing phases of each cycle were calculated and outlier spectra removed as described by Candy [2]. In this report, we discuss the results of our classification of the heart valve sound measurements. The goal of this classification task was to apply the fundamental classification algorithms developed for the clinical data in 1994 and 1996 to the measurements from the anechoic water tank. From the beginning of this project, LLNL's responsibility has been to process and classify the heart valve sounds. For this experiment, however, we processed both the opening sounds and closing sounds for comparison purposes. The results of this experiment show that the classifier did not perform well because of low signal-to-noise ratio and excessive variability in signal power from beat-to-beat for a given valve.

Axelrod, M C; Clark, G A; Scott, D

1999-06-01T23:59:59.000Z

249

Proximity effects in superconducting triplet spin-valve F2/F1/S  

Science Journals Connector (OSTI)

Abstract We investigate the critical temperature Tc of F2/F1/S trilayers (Fi is a ferromagnetic metal and S is a singlet superconductor), where the long-range triplet superconducting component is generated at noncollinear magnetizations of the F layers. In this paper we demonstrate a possibility of the spin-valve effect mode selection (standard switching effect, the triplet spin-valve effect or reentrant T c ( ? ) dependence) by the variation of the F2/F1 interface transparency.

R.G. Deminov; L.R. Tagirov; R.R. Gaifullin; T.Yu. Karminskaya; M.Yu. Kupriyanov; Ya.V. Fominov; A.A. Golubov

2015-01-01T23:59:59.000Z

250

High temperature superconductor current leads  

DOE Patents [OSTI]

An electrical lead is disclosed having one end for connection to an apparatus in a cryogenic environment and the other end for connection to an apparatus outside the cryogenic environment. The electrical lead includes a high temperature superconductor wire and an electrically conductive material distributed therein, where the conductive material is present at the one end of the lead at a concentration in the range of from 0 to about 3% by volume, and at the other end of the lead at a concentration of less than about 20% by volume. Various embodiments are shown for groups of high temperature superconductor wires and sheaths. 9 figs.

Hull, J.R.; Poeppel, R.B.

1995-06-20T23:59:59.000Z

251

DOE-SPEC-3019-96 | Department of Energy  

Office of Environmental Management (EM)

September 17, 1996 DOE Specification, Valve-Regulated Type Lead-Acid Storage Batteries Canceled, Effective October 2001, due to FY 2001 Sunset Review This specification...

252

Enabling Technologies Lead: Mark Davis  

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

Technologies Technologies Lead: Mark Davis 3.2 Omics Platforms for Systems Biology Lead: Tim Tschaplinski 3.3 Advanced Pretreatment Configuration and Conditions Lead: Charles Wyman 3.1 Characterization of Biomass Features that Enhance Sugar Release Lead: Art Ragauskas 3.1.1 Support for Identification of the TOP40 Recalcitrant Lines (Gjersing) 3.1.2 In-Depth Cell Wall Characterization (Ragauskas) 3.2.1 Transcriptomics & Resequencing (Brown) 3.2.2 Proteomics (Hettich) 3.3.4 Demonstration of Improved Plants with CBP Organisms (Yee) 3.4 Computational Biology Lead: Ying Xu 3.3.1 Enhance Understanding of Pretreatment Fundamentals and Control Recalcitrance (Wyman) 3.3.2 Integrate, Optimize, and Understand Pretreatment with Advanced Plants (Wyman) 3.4.1 An Integrated Omics Data Analysis and

253

Externally heated valve engine -- An alternative to the Stirling engine  

SciTech Connect (OSTI)

A new concept of the Externally Heated Valve (EHV) engine is presented. The principle of the engine operation is described in the introduction to the paper. Heat delivered to the working medium (air) in the heater, or several heaters working commutatively, can come from a combustion chamber or other heat generator such as nuclear reactors or solar collectors. The engine construction is original entirely different from the well-known Stirling engine. New results of the EHV engine computer modeling are presented. This is connected with a new kind of the annular heater applied to the EHV engine. A whirl motion inside the heater is caused to ensure the proper condition of the heat exchanger during the whole engine cycle. Three heaters working commutatively have been considered in this model. Comparisons between the power and efficiency of the Stirling engine and EHV engine have been performed for the same engine capacity, rotational frequency, maximum and minimum temperatures of the working gas and for the same mean pressures of both the engine cycles. The power of the EHV engine is in this case over three times higher than the Stirling engine power, while the efficiency of both the engines is almost the same.

Kazimierski, Z. [Tohoku Gakuin Univ., Sendai, Miyagi (Japan). Research Div. in Mechanical Engineering; Brzeski, L. [Technical Univ. of Lodz (Poland). Dept. of Mechanical Engineering

1996-12-31T23:59:59.000Z

254

Risk assessment of drain valve failure in the K-West basin south loadout pit  

SciTech Connect (OSTI)

The drain valve located in the bottom of the K-West Basin South Loadout Pit (SLOP) could provide an additional leak path from the K Basins if the drain valve were damaged during construction, installation, or operation of the cask loading system. For the K-West Basin SLOP the immersion pail support structure (IPSS) has already been installed, but the immersion pail has not been installed in the IPSS. The objective of this analysis is to evaluate the risk of damaging the drain valve during the remaining installation activities or operation of the cask loading system. Valve damage, as used in this analysis, does not necessarily imply large amounts of the water will be released quickly from the basin, rather valve damage implies that the valve's integrity has been compromised. The analysis process is a risk-based uncertainty analysis where best engineering judgement is used to represent each variable in the analysis. The uncertainty associated with each variable is represented by a probability distribution. The uncertainty is propagated through the analysis by Monte Carlo convolution techniques. The corresponding results are developed as a probability distribution and the risk is expressed in terms of the corresponding complementary cumulative distribution function (''risk curve''). The total risk is the area under the ''risk curve''. The risk of potentially dropping a cask into or on the IPSS and damaging the drain valve is approximately 1 x 10{sup -4} to 2 x 10{sup -5} per year. The risk of objects falling behind the IPSS and damaging the valve is 3 x 10{sup -2} to 6 x 10{sup -3} per year. Both risks are expressed as drain value failure frequencies. The risk of objects falling behind the IPSS and damaging the valve can be significantly reduced by an impact limiter and/or installing a gating or plate over the area bounded by the back of the IPSS and the wall of the SLOP. With either of these actions there is a 90 percent confidence that the frequency of drain valve failure would be less than 1 x 10{sup -6} per year.

MORGAN, R.G.

1999-06-23T23:59:59.000Z

255

It's Elemental - The Element Lead  

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

Thallium Thallium Previous Element (Thallium) The Periodic Table of Elements Next Element (Bismuth) Bismuth The Element Lead [Click for Isotope Data] 82 Pb Lead 207.2 Atomic Number: 82 Atomic Weight: 207.2 Melting Point: 600.61 K (327.46°C or 621.43°F) Boiling Point: 2022 K (1749°C or 3180°F) Density: 11.342 grams per cubic centimeter Phase at Room Temperature: Solid Element Classification: Metal Period Number: 6 Group Number: 14 Group Name: none What's in a name? From the Anglo-Saxon word lead. Lead's chemical symbol comes from the Latin word for waterworks, plumbum. Say what? Lead is pronounced as LED. History and Uses: Lead has been known since ancient times. It is sometimes found free in nature, but is usually obtained from the ores galena (PbS), anglesite (PbSO4), cerussite (PbCO3) and minum (Pb3O4). Although lead makes up only

256

Optimal Design of a High-Speed On/Off Valve for a Hydraulic Hybrid Vehicle Application  

E-Print Network [OSTI]

Coefficient 0.6 same none eq Fluid Bulk Modulus 3.7 x 108 1.2 x 109 Pa Pc Check Valve Cracking Pressure 3.2 NOptimal Design of a High-Speed On/Off Valve for a Hydraulic Hybrid Vehicle Application Michael of Minnesota, Minneapolis, MN, USA ABSTRACT Control of hydraulic systems using high-speed on/off valves has

Li, Perry Y.

257

Regulators, Requirements, Statutes  

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

Statutes Regulators, Requirements, Statutes The Laboratory must comply with environmental laws and regulations that apply to Laboratory operations. Contact Environmental...

258

Processing of prosthetic heart valve sounds for single leg separation classification  

SciTech Connect (OSTI)

Efforts are concentrated on the sounds corresponding to the heart valve opening cycle. Valve opening and closing acoustics present additional information about the outlet strut condition---the structural component implicated in valve failure. The importance of the opening sound for single leg separation detection/classification is based on the fact that as the valve opens, the disk passively hits the outlet strut. The opening sounds thus yield direct information about outlet strut condition with minimal amount of disturbance caused by the energy radiated from the disk. Hence the opening sound is a very desirable acoustic signal to extract. Unfortunately, the opening sounds have much lower signal levels relative to the closing sounds and therefore noise plays a more significant role than during the closing event. Because of this it is necessary to screen the sounds for outliers in order to insure a high sensitivity of classification. Because of the sharp resonances appearing in the corresponding spectrum, a parametric processing approach is developed based on an autoregressive model which was selected to characterize the sounds emitted by the Bjork--Shiley convexo--concave (BSCC) valve during opening cycle. First the basic signals and the extraction process used to create an ensemble of heart valve sounds are briefly discussed. Next, a {ital beat} {ital monitor} capable of rejecting beats that fail to meet an acceptance criteria based on their spectral content is developed. Various approaches that have been utilized to enhance the screened data and produce a reliable {ital heart} {ital valve} {ital spectrogram} which displays the individual sounds (power) as a function of beat number and temporal frequency are discussed. Once estimated, the spectrogram and associated parameters are used to develop features supplied to the various classification schemes. Finally, future work aimed at even further signal enhancement and improved classifier performance is discussed.

Candy, J.V.; Jones, H.E. [University of California, Lawrence Livermore National Laboratory, P.O. Box 808, L-495, Livermore, California 94550 (United States)

1995-06-01T23:59:59.000Z

259

Classification of heart valve sounds from experiments in an anechoic water tank  

SciTech Connect (OSTI)

In vivo studies in both sheep and humans were plagued by a number of problems including movement artifacts, biological noise, low signal-to-noise ratio (SNR), chest-wall reverberation, and limited bandwidth recordings as discussed by [1]. To overcome these problems it was decided to record heart valve sounds under controlled conditions deep in an anechoic water tank, free from reverberation noise, including surface reflections. Experiments were conducted in a deep water tank at the Transdec facility in San Diego, which satisfies these requirements. The Transdec measurements are free of reverberations, but not totally free of acoustic and electrical noise. We used a high quality hydrophone together with a wide-band data acquisition system [2]. We recorded sounds from 100 repetitions of the opening-closing cycles on each of 50 different heart valves, including 21 SLS valves and 29 intact valves. The power spectrum of the opening and closing phases of each cycle were calculated and outlier spectra removed as described by Candy [2]. In this report, we discuss the results of our classification of the heart valve sound measurements. The goal of this classification task was to apply the fundamental classification algorithms developed for the clinical data in 1994 and 1996 to the measurements from the anechoic water tank. From the beginning of this project, LLNL's responsibility has been to process and classify the heart valve opening sounds. For this experiment, however, we processed both the opening sounds and closing sounds for comparison purposes. The results of this experiment show that the classifier did not perform well. We believe this is because of low signal-to-noise ratio and excessive variability in signal power from beat-to-beat for a given valve.

Axelrod, M C; Clark, G A; Scott, D

1999-06-01T23:59:59.000Z

260

Multi objective optimisation of an electromagnetic valve actuator Nicolas BELLEGARDE, Jean-Claude VANNIER, Philippe DESSANTE, Pierre VIDAL  

E-Print Network [OSTI]

Multi objective optimisation of an electromagnetic valve actuator Nicolas BELLEGARDE, Jean, weight, volume. 1. Notations a Thickness of the mobile part (mm) Slot's coefficient of occupation b

Paris-Sud XI, Université de

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


261

NATIONAL LEAD ,COMPANY OF OHIO  

Office of Legacy Management (LM)

tic.. 02-j . . NATIONAL LEAD ,COMPANY OF OHIO 2186002 I ,""ll"IAWl OF NL. Irl>"Or"ICI. INC. CINCINNATI. OHIO 45239 June 1, 1979 TRIP REPORT - VISIT M THORILIM STORAGE FACILITY OF...

262

ISOLOK VALVE ACCEPTANCE TESTING FOR DWPF SME SAMPLING PROCESS  

SciTech Connect (OSTI)

Evaluation of the Defense Waste Processing Facility (DWPF) Chemical Process Cell (CPC) cycle time identified several opportunities to improve the CPC processing time. Of the opportunities, a focus area related to optimizing the equipment and efficiency of the sample turnaround time for DWPF Analytical Laboratory was identified. The Mechanical Systems & Custom Equipment Development (MS&CED) Section of the Savannah River National Laboratory (SRNL) evaluated the possibility of using an Isolok{reg_sign} sampling valve as an alternative to the Hydragard{reg_sign} valve for taking process samples. Previous viability testing was conducted with favorable results using the Isolok sampler and reported in SRNL-STI-2010-00749 (1). This task has the potential to improve operability, reduce maintenance time and decrease CPC cycle time. This report summarizes the results from acceptance testing which was requested in Task Technical Request (TTR) HLW-DWPF-TTR-2010-0036 (2) and which was conducted as outlined in Task Technical and Quality Assurance Plan (TTQAP) SRNL-RP-2011-00145 (3). The Isolok to be tested is the same model which was tested, qualified, and installed in the Sludge Receipt Adjustment Tank (SRAT) sample system. RW-0333P QA requirements apply to this task. This task was to qualify the Isolok sampler for use in the DWPF Slurry Mix Evaporator (SME) sampling process. The Hydragard, which is the current baseline sampling method, was used for comparison to the Isolok sampling data. The Isolok sampler is an air powered grab sampler used to 'pull' a sample volume from a process line. The operation of the sampler is shown in Figure 1. The image on the left shows the Isolok's spool extended into the process line and the image on the right shows the sampler retracted and then dispensing the liquid into the sampling container. To determine tank homogeneity, a Coliwasa sampler was used to grab samples at a high and low location within the mixing tank. Data from the two locations were compared to determine if the contents of the tank were well mixed. The Coliwasa sampler is a tube with a stopper at the bottom and is designed to obtain grab samples from specific locations within the drum contents. A position paper (4) was issued to address the prototypic flow loop issues and simulant selections. A statistically designed plan (5) was issued to address the total number of samples each sampler needed to pull, to provide the random order in which samples were pulled and to group samples for elemental analysis. The TTR required that the Isolok sampler perform as well as the Hydragard sampler during these tests to ensure the acceptability of the Isolok sampler for use in the DWPF sampling cells. Procedure No.L9.4-5015 was used to document the sample parameters and process steps. Completed procedures are located in R&D Engineering job folder 23269.

Edwards, T.; Hera, K.; Coleman, C.; Jones, M.; Wiedenman, B.

2011-12-05T23:59:59.000Z

263

Apparatus and method for non-invasive diagnosis and control of motor operated valve condition  

DOE Patents [OSTI]

An apparatus compares the torque from an MOV motor with the valve displacement, and from the comparison assesses MOV operating condition. A transducer measures the vibration of the housing of an MOV. The vibrations are due to the motions of the rotating elements within the housing, which motions are directly related to the motion of the valve relative to its seat. Signal processing apparatus analyzes the vibrations to recover the rotations of the rotating elements and thus the motion of the valve plug. Lost motion can also be determined (if a lost motion connection exists) by demodulating the vibration signal and thus taking into account also the lost motion. Simultaneously, the forces applied to the valve are estimated by estimating the torque between the stator and the rotor of the motor. Such torque can be estimated from measuring the input current and voltage alone, using a forgetting factor and a correction for the forgetting factor. A signature derived from relating the torque to the valve position can be used to assess the condition of the MOV, by comparing the signature to signatures for MOVs of known conditions. The vibration analysis components generate signals that relate to the position of elements in the operator. Similarly, the torque estimator estimates the torque output by any type of electric motor, whether or not part of an MOV analysis unit. 28 figs.

Lyon, R.H.; Chai, J.; Lang, J.H.; Hagman, W.H.; Umans, S.D.; Saarela, O.J.

1997-01-14T23:59:59.000Z

264

Apparatus and method for non-invasive diagnosis and control of motor operated valve condition  

DOE Patents [OSTI]

An apparatus compares the torque from an MOV motor with the valve displacement, and from the comparison assesses MOV operating condition. A transducer measures the vibration of the housing of an MOV. The vibrations are due to the motions of the rotating elements within the housing, which motions are directly related to the motion of the valve relative to its seat. Signal processing apparatus analyzes the vibrations to recover the rotations of the rotating elements and thus the motion of the valve plug. Lost motion can also be determined (if a lost motion connection exists) by demodulating the vibration signal and thus taking into account also the lost motion. Simultaneously, the forces applied to the valve are estimated by estimating the torque between the stator and the rotor of the motor. Such torque can be estimated from measuring the input current and voltage alone, using a forgetting factor and a correction for the forgetting factor. A signature derived from relating the torque to the valve position can be used to assess the condition of the MOV, by comparing the signature to signatures for MOVs of known conditions. The vibration analysis components generate signals that relate to the position of elements in the operator. Similarly, the torque estimator estimates the torque output by any type of electric motor, whether or not part of an MOV analysis unit.

Lyon, Richard H. (Belmont, MA); Chai, Jangbom (Seoul, KR); Lang, Jeffrey H. (Sudbury, MA); Hagman, Wayne H. (Belmont, MA); Umans, Stephen D. (Belmont, MA); Saarela, Olli J. (Helsinki, FI)

1997-01-01T23:59:59.000Z

265

Heart valve cardiomyocytes of mouse embryos express the serotonin transporter SERT  

SciTech Connect (OSTI)

Multiple evidence demonstrate a role for serotonin and its transporter SERT in heart valve development and disease. By utilizing a Cre/loxP system driven by SERT gene expression, we recently demonstrated a regionally restricted distribution of SERT-expressing cells in developing mouse heart. In order to characterize the cell types exhibiting SERT expression within the mouse heart valves at early developmental stages, in this study we performed immunohistochemistry for Islet1 (Isl1) and connexin-43 (Cx-43) on heart sections from SERT{sup Cre/+};ROSA26R embryos previously stained with X-gal. We observed the co-localization of LacZ staining with Isl1 labelling in the outflow tract, the right ventricle and the conal region of E11.5 mouse heart. Cx-43 labelled cells co-localized with LacZ stained cells in the forming atrioventricular valves. These results demonstrate the cardiomyocyte phenotype of SERT-expressing cells in heart valves of the developing mouse heart, thus suggesting an active role of SERT in early heart valve development.

Pavone, Luigi Michele [Department of Biological Structures, Functions and Technologies, University of Naples Federico II, Via F. Delpino 1, 80137 Naples (Italy); Department of Biochemistry and Medical Biotechnologies, University of Naples Federico II, Naples (Italy)], E-mail: pavone@dbbm.unina.it; Spina, Anna; Lo Muto, Roberta; Santoro, Dionea [Department of Biological Structures, Functions and Technologies, University of Naples Federico II, Via F. Delpino 1, 80137 Naples (Italy); Department of Biochemistry and Medical Biotechnologies, University of Naples Federico II, Naples (Italy); Mastellone, Vincenzo [Department of Experimental Medicine 'G. Salvatore', University of Magna Graecia, Catanzaro (Italy); Avallone, Luigi [Department of Biological Structures, Functions and Technologies, University of Naples Federico II, Via F. Delpino 1, 80137 Naples (Italy)

2008-12-12T23:59:59.000Z

266

Uncertainty Analysis for a Virtual Flow Meter Using an Air-Handling Unit Chilled Water Valve  

SciTech Connect (OSTI)

A virtual water flow meter is developed that uses the chilled water control valve on an air-handling unit as a measurement device. The flow rate of water through the valve is calculated using the differential pressure across the valve and its associated coil, the valve command, and an empirically determined valve characteristic curve. Thus, the probability of error in the measurements is significantly greater than for conventionally manufactured flow meters. In this paper, mathematical models are developed and used to conduct uncertainty analysis for the virtual flow meter, and the results from the virtual meter are compared to measurements made with an ultrasonic flow meter. Theoretical uncertainty analysis shows that the total uncertainty in flow rates from the virtual flow meter is 1.46% with 95% confidence; comparison of virtual flow meter results with measurements from an ultrasonic flow meter yielded anuncertainty of 1.46% with 99% confidence. The comparable results from the theoretical uncertainty analysis and empirical comparison with the ultrasonic flow meter corroborate each other, and tend to validate the approach to computationally estimating uncertainty for virtual sensors introduced in this study.

Song, Li; Wang, Gang; Brambley, Michael R.

2013-04-28T23:59:59.000Z

267

Renovation and remaining life management techniques for the reliable operation of steam turbine valve casings  

SciTech Connect (OSTI)

Much attention has been focused on the renovation and remaining life management of steam turbine casings. Properly engineered casing repairs, design upgrades, and strategies such as thermal stress monitoring/control, have been successfully employed to keep older steam turbine casings operating reliably until projected plant decommissioning dates. These proven solutions have resulted in a much lower cost alternative to turbine casing replacement. Valve casings are also subject to the rigors of high pressure/temperature operating environments and have a significant replacement cost as well. The same techniques employed to renovate turbine casings can also be successfully applied to valve casings to ensure their reliable operation for the projected plant life. Of particular interest are design upgrades which can be introduced during the renovation. Advances in computer modeling and techniques such as Finite Element analysis have provided engineers with tools not available during the original casing design. This provides an opportunity to not only restore the casings to their original design, but to re-engineer the casings to exceed original design parameters. This paper will cover the engineering analysis of valve casing defects, restoration techniques, and design upgrades. Thermal stress monitoring will be introduced as a technique to manage remaining life. Typical failure modes in various valve casing designs as well as design improvements will be stressed. It will also use case studies to demonstrate the economic and technical advantages of valve and turbine casing renovation.

Rasmussen, D.M.; Otterlee, T.J. [Turbine Consultants, Inc., Milwaukee, WI (United States)

1994-12-31T23:59:59.000Z

268

Fast valve and nozzle for gas-puff operation of dense plasma focus  

Science Journals Connector (OSTI)

A simple and reliable valve and nozzle system for a very fast injection of gas has been designed and constructed for its use in gas-puff mode of dense plasma focus experiments. It delivers a very quick rise time: 55 ? s . The pressure measured in our setup at a distance of 15 mm from the nozzle output is about 0.285 mbar with a plenum pressure of 3 bars (absolute). The time between the valve aperture and pressure front arrival is 360 ? s . This result comes up as an average of about a hundred measurements. The energy input is 95 J (270 V on a 3000 ? F capacitor bank). The typical dimensions of the valve are 52 mm in diameter and 80 mm in length. The entire volume of the valve is then very small. The relative low pressure and voltage operation are significant advantages of this development. The performance of the valve satisfactorily fulfills the objectives of gas-puff plasma focus operation.

María M. Milanese; Jorge O. Pouzo; Osvaldo D. Cortázar; Roberto L. Moroso

2006-01-01T23:59:59.000Z

269

Nano-oxide-layer insertion and specular effects in spin valves: Experiment and theory  

Science Journals Connector (OSTI)

We report a systematic study of NOL (nano-oxide-layer) insertion and specular effects on the giant magnetoresistance (GMR) of single, synthetic, and dual spin valves, using a semiclassical Boltzmann theory. It is confirmed that the GMR ratio is enhanced by NOL insertion inside the pinned layer or after the free layer. The enhancements are primarily due to the contribution of the majority carriers. The NOL insertions inside the inactive layers of spin valves such as the seed, under, and capping layers reduce the GMR ratio. Though introducing a NOL before or after the Cu spacer would, in principle, significantly suppress the GMR ratio due to the blocking effect or the average effect of different spin channels, large positive or negative (inverse) GMR is found by assuming spin-dependent NOL specular reflections. We have also demonstrated that specular reflection, even beyond a capping layer, may result in reduction of GMR. Upon appropriate NOL insertion, the amplitude of curve of GMR versus thickness of individual layer of spin valves may be generally enhanced, but the shape may change, depending on whether the distance of the NOL to the layer is small or large (distance effect). Finally, it is found that most results obtained for the single realistic spin valves are applicable to synthetic and dual spin valves.

L. Wang; J. J. Qiu; W. J. McMahon; K. B. Li; Y. H. Wu

2004-06-03T23:59:59.000Z

270

Lead Auditor - Auditor Preparation Checklist  

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

Lead Auditor - Auditor Preparation Checklist Lead Auditor - Auditor Preparation Checklist |Number|Item|Status | ||Staff the Audit || ||Auditor Qualifications|| ||Audit Notification & Audit Plan Issued|| ||Auditor access issues resolved|| ||Audit team facilities|| ||Auditor audit areas / elements assigned|| ||Check lists Prepared Issued || ||Audited Org Docs to team QPP Work plans etc|| ||Past Audits to team || ||PC availability for Auditors|| ||Audit forms to auditors People Interviewed Documents reviewed Entrance Meeting Attendance Exit Meeting Attendance, Issue Development Sheet[1] Form 11 Form 21|| ||Audit protocols, conduct of auditors|| ||Entrance meeting slides|| ||Exit meeting slide outline|| ||Report Shell to Team|| ----------------------- [1] Use of this will be explained in the second article of the series

271

Bypass valve and coolant flow controls for optimum temperatures in waste heat recovery systems  

DOE Patents [OSTI]

Implementing an optimized waste heat recovery system includes calculating a temperature and a rate of change in temperature of a heat exchanger of a waste heat recovery system, and predicting a temperature and a rate of change in temperature of a material flowing through a channel of the waste heat recovery system. Upon determining the rate of change in the temperature of the material is predicted to be higher than the rate of change in the temperature of the heat exchanger, the optimized waste heat recovery system calculates a valve position and timing for the channel that is configurable for achieving a rate of material flow that is determined to produce and maintain a defined threshold temperature of the heat exchanger, and actuates the valve according to the calculated valve position and calculated timing.

Meisner, Gregory P

2013-10-08T23:59:59.000Z

272

Operating experience of the IFSMTF (International Fusion Superconducting Magnet Test Facility) vapor-cooled lead system  

SciTech Connect (OSTI)

The International Fusion Superconducting Magnet Test Facility (IFSMTF) uses six pairs of vapor-cooled leads (VCLs) to introduce electric power to six test coils. Each VCL is housed in a dewar outside the 11-m vacuum vessel and is connected to the coal via a superconducting bus duct;the various VCLs are rated at 12 to 20 kA. Heat loss through the leads constitutes the single largest source of heat load to the cryogenic system. Concerns about voltage breakdown if a coil quenches have led to precautionary measures such as installation of a N/sub 2/-purged box near the top of the lead and shingles to collect water that condenses on the power buses. A few joints between power buses and VCLs were found to be inadequate during preliminary single-coil tests. This series of tests also pointed to the need for automatic control of helium flow through the leads. This was achieved by using the resistance measurements of the leads to control flow valves automatically. By the time full-array tests were started, a working scheme had developed that required little attention to the leads and that had little impact on the refrigerator between zero and full current to the coils. The operating loss of the VCLs at full current is averaging at about 7.4 gs of warm flow and 360 W of cold-gas return load. These results are compared with predictions that were based on earlier tests. 4 refs., 6 figs

Lue, J.W.; Fehling, D.T.; Fietz, W.A.; Lubell, M.S.; Luton, J.N.; Schwenterly, S.W.; Shen, S.S.; Stamps, R.E.; Thompson, D.H.; Wilson, C.T.

1987-01-01T23:59:59.000Z

273

Analysis of HFIR pressurizer pump overspeed transients and relief valve performance  

SciTech Connect (OSTI)

The pressurizer pump overspeed transients at the High Flux Isotope Reactor (HFIR) fall in the category of {open_quotes}increase in coolant inventory transients.{close_quotes} They are among the accident transients to be performed for Chapter 15 of the HFIR safety analysis report (SAR). The pressurizer pump speed starting to increase inadvertently to reach its maximum speed of 3,560 rpm while the reactor operates under normal conditions is the cause of this transient. Increased primary coolant system pressure due to increased pressurizer pump flow into the primary coolant head tank challenges the relief valves to open. If the relief valves do not open, increased primary coolant system pressure will challenge the integrity of the high pressure boundary. Two sets of analyses were performed to analyze the pressurizer pump overspeed transients. The purpose of the first analysis is to estimate how long it will take for the relief valves to open under different conditions and whether or not they will chatter or flutter for a considerable amount of time. The analysis estimates relief valve performance and stability using four different relief valve subsystem models. The relief valve subsystem models are not attached to the primary coolant system model. Vigorous pressure oscillations were produced in all of the computations performed as part of the first analysis. The second analysis includes new simulations of the pressurizer pump overspeed transients that were previously simulated using the RELAP5 thermal-hydraulic computer code. The HFIRSYS, High Flux Isotope Reactor System Transient Analysis computer code, was utilized for these simulations providing referable results for comparisons. The increased pressurizer pump flow due to runaway pressurizer pump speed pressurizes the primary coolant system. The assumptions were made in such a way to form constraining conditions at initiation of and during the transients to generate as high an overpressure situation as possible.

Sozer, M.C.

1992-09-11T23:59:59.000Z

274

Spin-dependent thermal and electrical transport in a spin-valve system Zheng-Chuan Wang,1  

E-Print Network [OSTI]

Spin-dependent thermal and electrical transport in a spin-valve system Zheng-Chuan Wang,1 Gang Su,1 governed by thermal processes at high temperature. The so-called spin-valve phenomenon is clearly uncovered, the quantum size effect on the thermal conduc- tance and the Peltier coefficient,2 the diffusive thermopower

Gao, Song

275

NATIONAL LEAD COMPANY OF OHIO  

Office of Legacy Management (LM)

t-t AL- 1. + T fi r,y* t ,.- . NATIONAL LEAD COMPANY OF OHIO Ofll i iy Ci)wp HEALTH AND SAFETY DIVISION - ANALYTICAL DEPT. ANALYTICAL DATA SHEET U-G b ;33y jl:tL G c-w &3(y I...

276

A leading German government official  

E-Print Network [OSTI]

for Transatlantic Coopera- tion, called the Upstate Honors hosts German M.P. "an impressive example of our strong German- American partnership" and described Greenville as a leading example of close transatlantic busi program during their May 2012 visit to Berlin. In his role as Coordinator for Transatlantic Coopera- tion

Duchowski, Andrew T.

277

Fail save shut off valve for filtering systems employing candle filters  

DOE Patents [OSTI]

The invention relates to an apparatus that acts as a fail save shut off valve. More specifically, the invention relates to a fail save shut off valve that allows fluid flow during normal operational conditions, but prevents the flow of fluids in the event of system failure upstream that causes over-pressurization. The present invention is particularly well suited for use in conjunction with hot gas filtering systems, which utilize ceramic candle filters. Used in such a hot gas system the present invention stops the flow of hot gas and prevents any particulate laden gas from entering the clean side of the system.

VanOsdol, John (Fairmont, WV)

2006-01-03T23:59:59.000Z

278

Fail Save Shut Off Valve for Filtering Systems Employing Candle Filters  

DOE Patents [OSTI]

The invention relates to an apparatus that acts as a fail save shut off valve. More specifically, the invention relates to a fail save shut off valve that allows fluid flow during normal operational conditions, but prevents the flow of fluids in the event of system failure upstream that causes over-pressurization. The present invention is particularly well suited for use in conjunction with hot gas filtering systems, which utilize ceramic candle filters. Used in such a hot gas system the present invention stops the flow of hot gas and prevents any particulate laden gas from entering the clean side of the system.

VanOsdol, John

2006-01-03T23:59:59.000Z

279

LLNL heart valve condition classification project anechoic testing results at the TRANSDEC evaluation facility  

SciTech Connect (OSTI)

This report first briefly outlines the procedures and support/activation fixture developed at LLNL to perform the heart valve tests in an anechoic-like tank at the US Navy Transducer Evaluation Facility (TransDec) located in San Diego, CA. Next they discuss the basic experiments performed and the corresponding experimental plan employed to gather meaningful data systematically. The signal processing required to extract the desired information is briefly developed along with some of the data. Finally, they show the results of the individual runs for each valve, point out any of the meaningful features and summaries.

Candy, J V

1999-10-31T23:59:59.000Z

280

Spin-transfer switching of orthogonal spin-valve devices at cryogenic temperatures  

SciTech Connect (OSTI)

We present the quasi-static and dynamic switching characteristics of orthogonal spin-transfer devices incorporating an out-of-plane magnetized polarizing layer and an in-plane magnetized spin valve device at cryogenic temperatures. Switching at 12?K between parallel and anti-parallel spin-valve states is investigated for slowly varied current as well as for current pulses with durations as short as 200 ps. We demonstrate 100% switching probability with current pulses 0.6?ns in duration. We also present a switching probability diagram that summarizes device switching operation under a variety of pulse durations, amplitudes, and polarities.

Ye, L., E-mail: ly17@nyu.edu; Gopman, D. B.; Rehm, L.; Backes, D.; Wolf, G.; Kent, A. D. [Department of Physics, New York University, New York, New York 10003 (United States); Ohki, T. [Raytheon BBN Technologies, Cambridge, Massachusetts 02138 (United States); Kirichenko, A. F.; Vernik, I. V.; Mukhanov, O. A. [HYPRES, 175 Clearbrook Road, Elmsford, New York 10523 (United States)

2014-05-07T23:59:59.000Z

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


281

Assessment of Concrete Repair Techniques for Radiologically Contaminated Tank Farm Pump and Valve Pits  

SciTech Connect (OSTI)

As part of the scope of Project W-314, ''Tank Farm Restoration and Safe Operations,'' the condition of pump and valve pit walls and floors is being assessed, and repairs made as needed, to support upgrading the infrastructure necessary to safely transfer tank waste for treatment. Flaws in the surfaces of the pits (e.g., concrete crack/faults, protective coating deterioration) must be repaired to ensure containment integrity and to facilitate future decontamination of the pits. This engineering study presents a cost/risk/benefit evaluation of concrete and protective coating repair methods in pump and valve pits using various manual and remote tool systems.

MINTEER, D.J.

2000-09-19T23:59:59.000Z

282

Sealing off a carbon nanotube with a self-assembled aqueous valve for the storage of hydrogen in GPa pressure  

E-Print Network [OSTI]

The end section of a carbon nanotube, cut by acid treatment, contains hydrophillic oxygen groups. Water molecules can self-assemble around these groups to seal off a carbon nanotube and form an "aqueous valve". Molecular dynamics simulations on single-wall (12,12) and (15,15) tubes with dangling carboxyl groups show that the formation of aqueous valves can be achieved both in the absence of and in the presence of high pressure hydrogen. Furthermore, significant diffusion barriers through aqueous valves are identified. It indicates that such valves could hold hydrogen inside the tube with GPa pressure. Releasing hydrogen is easily achieved by melting the "aqueous valve". Such a design provides a recyclable and non- destructive way to store hydrogen in GPa pressure. Under the storage conditions dictated by sealing off the container in liquid water, the hydrogen density inside the container is higher than that for solid hydrogen, which promises excellent weight storage efficiency.

Chen, H Y; Gong, X G; Liu, Zhi-Feng

2012-01-01T23:59:59.000Z

283

Left ventricular incision midway between the mitral anulus and the stumps of the papillary muscles during mitral valve excision with or without rupture or aneurysmal formation: Analysis of 10 necropsy patients  

Science Journals Connector (OSTI)

Certain clinical and morphologic observations are described in 10 patients who had mitral valve replacement (MVR) and lacerations of the left ventricular (LV) free wall midway between the anulus of the mitral valve and the stumps of the LV papillary muscles. In five patients the lacerations led to LV free wall rupture, with immediate hemopericardium in two and delayed (2 to 4 days) rupture in the other three. Of the other five patients, three developed aneurysm of the LV free wall, the mouth of which was located midway between mitral anulus and papillary muscle stumps, the sites of the lacerations observed in the other seven patients. The remaining two patients had midway lacerations which produced neither rupture nor aneurysmal formation. The midway LV lacerations are considered the result of LV incisions made at the time of mitral valve excision, generally in a setting where the left-sided cardiac chambers were only mildly dilated or normal and the tips of the blades of the scissors may have been inadequately visualized during mitral excision. This complication can be prevented by leaving the posterior mitral leaflet and its attached chordae intact or by applying exquisite care during the mitral excision procedure, or both. LV midway rupture may be the most common cause of death early after MVR and operatively induced LV lacerations may lead to LV aneurysm late postoperatively.

William C Roberts; Jeffrey M Isner; Renu Virmani

1982-01-01T23:59:59.000Z

284

Leadership and Leading Indicators Presentation  

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

Leadership Leadership and Leading Indicators Peter S. Winokur, Ph.D., Member Defense Nuclear Facilities Safety Board Thanks to Matt Moury and Doug Minnema August 28, 2008 Objectives * A few thoughts about leadership * Actions taken by leaders * Role of leading indicators * Consider the future August 28, 2008 2 3 Safety Culture Safety culture is an organization's values and behaviors - modeled by its leaders and internalized by its members - that serve to make nuclear safety an overriding priority.* - Dating back to SEN-35-91, it's DOE Policy; - It's perishable; - EFCOG/DOE ISMS Safety Culture Task Team. *INPO, Principles for a Strong Nuclear Safety Culture, November 2004. August 28, 2008 4 Leadership & Mission Top 10 Ways To Know You Have A Safety Culture: * #1 is Leadership - the talk and the walk

285

Construction integrity assessment report (ETN-98-0005) S-Farm overground transfer (OGT) system valve pit 241-S-B to valve pit 241-S-D  

SciTech Connect (OSTI)

The S-Farm overground transfer (OGT) line will bypass the existing line(s), between valve pits 241-S-B and 241-S-D that no longer meet system requirements. The new OGT line will provide a waste transfer pipeline between these valve pits in support of saltwell pumping activities. The length of the OGT line is approximately 180 ft from pit to pit. The primary pipe is nominal 1-in. diameter stainless steel (SST) braided Ethylene-propylene Diene Monomer (EPDM) hose. The encasement pipe is a nominal 3-in., flanged, SST pipe made up of several different length pipe spool pieces (drawing H-2-829564, sh. 1 and sh. 2). The OGT line slopes from valve pit 241-S-B toward valve pit 241-S-D. At each end, the primary and encasement pipe connect to a pit entry spool piece. The pit entry spool pieces are constructed of prefabricated SST materials. These spool pieces allow for the separation of the primary and encasement pipelines after the pipes have entered the valve pits (drawing H-2-818280, sh. 2). The pit entry spool pieces also allow for leak detection of the encasement pipe at each end (drawing H-2-829564, sh. 2). The OGT encasement pipeline is supported above ground by adjustable height unistrut brackets and precast concrete bases (drawing H-2-829654, sh. 1). The pipeline is heat-traced and insulated. The heat tracing and insulation supply and retain latent heat that prevents waste solidification during transfers and provides freeze protection. The total length of the pipeline is above ground, thereby negating the need for cathodic corrosion protection. This Construction Integrity Assessment Report (CIAR) is prepared by Fluor Daniel Northwest for Numatec Hanford Corporation/Lockheed Martin Hanford Corporation, the operations contractor, and the U. S. Department of Energy, the system owner. The CIAR is intended to verify that construction was performed in accordance with the provisions of Washington Administrative Code, WAC-173-303-640 (3) (c), (e), (f) and (h).

HICKS, D.F.

1999-08-12T23:59:59.000Z

286

An Active Motion Compensation Instrument for Beating Heart Mitral Valve Surgery  

E-Print Network [OSTI]

An Active Motion Compensation Instrument for Beating Heart Mitral Valve Surgery Daniel T. Kettler) is described. The resulting instrument was tested in user trials under a series of positional error bandwidth, creating a wrist that can operate in the restricted workspace within the heart, and ensuring

287

MOTION PLANNING CONTROL OF THE AIRPATH OF AN S.I. ENGINE WITH VALVE  

E-Print Network [OSTI]

to controlling the air mass aspirated in the cylinder. Besides, it is also desired to reduce engine pollutantMOTION PLANNING CONTROL OF THE AIRPATH OF AN S.I. ENGINE WITH VALVE TIMING ACTUATORS T. Leroy , J, France Abstract: We address the control of the airpath of a turbocharged S.I. engine equipped

Boyer, Edmond

288

Inhibition of aortic wall calcification in bioprosthetic heart valves by ethanol pretreatment: Biochemical and  

E-Print Network [OSTI]

Inhibition of aortic wall calcification in bioprosthetic heart valves by ethanol pretreatment 16 September 1997; 20 February 1998 Abstract: The effectiveness of ethanol pretreatment on pre was previously demonstrated, and the mechanism of action of ethanol was attributed in part to both lipid removal

Zand, Robert

289

Condition monitoring of motor-operated valves in nuclear power plants Pierre Granjon  

E-Print Network [OSTI]

Condition monitoring of motor-operated valves in nuclear power plants Pierre Granjon Gipsa of nuclear power plants. Unfortunately, today's policies present a major drawback. Indeed, these monitoring is illustrated through experimental data. 1. Introduction Nuclear power provides about 14% of the world

Boyer, Edmond

290

The Use of Coanda Wall Attachment Fluidic Switches as Gas Chromatographic Valves  

Science Journals Connector (OSTI)

......chromatographs operating in a process control application are quite...many research- ers since the commercialization of the chromatograph in the...is particularly evident in process chromatographs. Valves which...conditions are prone to fail in a process control environment where......

Raymond Annino; Jim Leone

1982-01-01T23:59:59.000Z

291

Low energy ion beam assisted deposition of a spin valve J. J. Quan,a  

E-Print Network [OSTI]

Low energy ion beam assisted deposition of a spin valve J. J. Quan,a S. A. Wolf, and H. N. G. Wadley Department of Materials Science and Engineering, School of Engineering and Applied Science interfacial structures can be created using low energy, ion assisted vapor deposition techniques with ion

Wadley, Haydn

292

Towards Real-Time and Memory Efficient Predictions of Valve States in Diesel Engines  

E-Print Network [OSTI]

Towards Real-Time and Memory Efficient Predictions of Valve States in Diesel Engines Philippe Komma phase complexity while retaining good generalization performance. I. INTRODUCTION In automotive engines T¨ubingen, Germany {philippe.komma, andreas.zell}@uni-tuebingen.de system for a diesel engine

Zell, Andreas

293

A characterization of check valve degradation and failure experience in the nuclear power industry: 1984-1990. Volume 1  

SciTech Connect (OSTI)

Check valve operating problems in recent years have resulted in significant operating transients, increased cost and decreased system availability. As a result, additional attention has beau given to check valves by utilities (resulting in the formation of the Nuclear Industry Check Valve Group), as well as the US Nuclear Regulatory Commission and the American Society of Mechanical Engineers Operation and Maintenance Committee. All these organizations have the fundamental goal of ensuring reliable operation of check valves. A key ingredient to an engineering-oriented reliability improvement effort is a thorough understanding of relevant historical experience. A detailed review of historical failure data, available through the Institute of Nuclear Power Operation`s Nuclear Plant Reliability Data System, has been conducted. The focus of the review is on check valve failures that have involved significant degradation of the valve internal parts. A variety of parameters are considered, including size, age, system of service, method of failure discovery, the affected valve parts, attributed causes, and corrective actions.

Casada, D.A.; Todd, M.D. [Oak Ridge National Lab., TN (United States)] [Oak Ridge National Lab., TN (United States)

1993-09-01T23:59:59.000Z

294

Application of Modelica/MWorks on modeling, simulation and optimization for electro-hydraulic servo valve system  

Science Journals Connector (OSTI)

Electro-hydraulic servo valve is a typical complicated multi-domain system constituted by mechanical electric hydraulic and magnetic components which is widely used in electro-hydraulic servo systems such as construction machinery heavy equipment weapon and so forth. The traditional method of modeling and simulation of servo valve is based on block diagram or signal flow which cannot describe the servo valve system from components level nor be used in modeling and simulation of overall servo systems. In the procedure of traditional method computational causality must be involved in modeling of servo valve which is inconvenient to execute modification on components or parameters. Modelica is an object-oriented modeling language which is suited for large complex heterogeneous and multi-domain systems. The key features of Modelica are multi-domain object-oriented and non-causal which are suitable for modeling of servo valve and make the model readable reusable and easy to modify. The simulation results show similar curves with traditional method. This new servo valve modeling and simulation method can provide the engineers a more efficient way to design and optimize a servo valve and an overall servo system.

Ming Li; Guang Meng; Jianping Jing; Jinyang Liu; Zuoyang Zhong

2012-01-01T23:59:59.000Z

295

Analysis of system performance losses due to the reversing valve for a heat pump using R-410a  

SciTech Connect (OSTI)

A traditional reversing valve enables a heat pump to operate in the heating mode or cooling mode by switching the refrigerant flow path through the indoor and outdoor coils, thereby changing the functions of the two heat exchangers. However, the presence of a reversing valve causes additional pressure drops and undesired heat exchange. The objective of this research was to measure the overall effects of a reversing valve on a 3-ton heat pump system using R-401a and make comparisons to the same valve's performance with R-22 as the refrigerant. The experiments included tests of under- and over-sized valves at the same test conditions. Also, the effects of pressure drops and of heat transfer combined with mass leakage on system and compressor performance were analyzed. It was found that the use of a larger (oversized) reversing valve to reduce pressure drops provided only limited performance gains. Also, changing refrigerant from R-22 to R-410a resulted in an increase in mass leakage but did not significantly change the effect that the reversing valve had on the system COP.

Fang, W.; Nutter, D.W.

1999-07-01T23:59:59.000Z

296

Detection of ``single-leg separated`` heart valves using statistical pattern recognition with the nearest neighbor classifier  

SciTech Connect (OSTI)

The goal of this work was to detect ``single-leg separated`` Bjoerk-Shiley Convexo-Concave heart valves which had been implanted in sheep. A ``single-leg separated`` heart valve contains a fracture in the outlet strut resulting in an increased risk of mechanical failure. The approach presented in this report detects such fractures by applying statistical pattern recognition with the nearest neighbor classifier to the acoustic signatures of the valve opening. This approach is discussed and results of applying it to real data are given.

Buhl, M.R.; Clark, G.A.; Candy, J.V.; Thomas, G.H.

1993-07-16T23:59:59.000Z

297

Detection of ``single-leg separated`` heart valves using statistical pattern recognition with the nearest neighbor classifier. Revision 1  

SciTech Connect (OSTI)

The goal of this work was to detect ``single-leg separated`` Bjoerk-Shiley Convexo-Concave heart valves which had been implanted in sheep. A ``single-leg separated`` heart valve contains a fracture in the outlet strut resulting in an increased risk of mechanical failure. The approach presented in this report detects such fractures by applying statistical pattern recognition with the nearest neighbor classifier to the acoustic signatures of the valve opening. This approach is discussed and results of applying it to real data are given.

Buhl, M.R.; Clark, G.A.; Candy, J.V.; Thomas, G.H.

1993-12-01T23:59:59.000Z

298

Nick Wright Named Advanced Technologies Group Lead  

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

Nick Wright Named Advanced Technologies Group Lead Nick Wright Named Advanced Technologies Group Lead February 4, 2013 Nick Nick Wright has been named head of the National Energy...

299

Distributed Generation Lead-by-Example Resources  

Broader source: Energy.gov [DOE]

State governments can lead by example by promoting renewable energy programs and policies. Efforts to lead by example include using renewable energy resources (including alternative fuel for...

300

Scintillation properties of lead sulfate  

SciTech Connect (OSTI)

We report on the scintillation properties of lead sulfate (PbSO{sub 4}), a scintillator that show promise as a high energy photon detector. It physical properties are well suited for gamma detection, as its has a density of 6.4 gm/cm{sup 3}, a 1/e attenuation length for 511 keV photons of 1.2 cm, is not affected by air or moisture, and is cut and polished easily. In 99.998% pure PbSO{sub 4} crystals at room temperature excited by 511 keV annihilation photons, the fluorescence decay lifetime contains significant fast components having 1.8 ns (5%) and 19 ns (36%) decay times, but with longer components having 95 ns (36%) and 425 ns (23%) decays times. The peak emission wavelength is 335 nm, which is transmitted by borosilicate glass windowed photomultiplier tubes. The total scintillation light output increases with decreasing temperature fro 3,200 photons/MeV at +45{degrees}C to 4, 900 photons/MeV at room temperature (+25{degrees}C) and 68,500 photons/MeV at {minus}145{degrees}C. In an imperfect, 3 mm cube of a naturally occurring mineral form of PbSO{sub 4} (anglesite) at room temperature, a 511 keV photopeak is seen with a total light output of 60% that BGO. There are significant sample to sample variations of the light output among anglesite samples, so the light output of lead sulfate may improve when large synthetic crystals become available. 10 refs.

Moses, W.W.; Derenzo, S.E. [Lawrence Berkeley Lab., CA (United States); Shlichta, P.J. [Crystal Research, San Pedro, CA (United States)

1991-11-01T23:59:59.000Z

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


301

A custom-designed limited-angle actuator for an electromechanical engine valve drive Part II: Fabrication and evaluation  

E-Print Network [OSTI]

Research has shown that variable valve timing (VVT) can improve significantly the performance of internal combustion (IC) engines, including higher fuel efficiencies, lower emissions, and larger torque outputs at each point ...

Kassakian, John G.

302

A study on flow characteristics and discharge coefficients of safety valve used in LNG/LNG-FPSO ships  

Science Journals Connector (OSTI)

The safety valves used in liquefied natural gas — floating production storage and offloading (LNG-FPSO) ships play an important role in ... controlling the release of liquefied natural gas (LNG) from pipes in an

Jun-Ho Bae; Sung-Jin Kim; Moon-Saeng Kim…

2011-09-01T23:59:59.000Z

303

Fault Current Limit (FCL) Technology (Magnetic Valve Controlled Reactor-Type Fault Current Limiter Principle and Simulation)  

Science Journals Connector (OSTI)

Summarized the FCL practical research which faces to the key technical problems, briefly introduces the study of magnetic valve controllable reactor type fault current limiter principle, and the simulation result...

Chunzhe Shi

2012-01-01T23:59:59.000Z

304

A Four-Valve Pulse Tube Cryocooler with a Cooling Power over 30 W at 80 K  

Science Journals Connector (OSTI)

A single stage four-valve pulse tube cryocooler with a large cooling power at 80 K has been built and ... investigating the influence of pulse tube size on cooling performance. Initial test demonstrated that the ...

R. Li; K. Kanao; N. Watanabe; Y. Kanazawa

1998-01-01T23:59:59.000Z

305

NATIONAL LEAD COMPANY OF OHIO  

Office of Legacy Management (LM)

~y-f-hjLo-- yy; 4: j ).,Ic ~y-f-hjLo-- yy; 4: j ).,Ic +- NATIONAL LEAD COMPANY OF OHIO s _ HEALTH AND SAFETY DIVISION - ANALYTICAL DEPT. . ANALYTICAL DATA SHEET o-0 1. H. NO. TRIAL, HYGIENE AND RADIATION DEPT. AMPLE Nti.1. //- 6:itEC TEDI it/;/L 5 .,- -..-- -- -.._-. -. I --- --- 1 ANALYTICA .OATE RECeiVEDi mri /-2-v& 3 Li >,a. HCJ _-..k.-*..- -.v._ 1 NO. DISTRIBUTION OF COPIES 1 Analytlcal Labwatwy (RECORD COPP) 2 Industrial Hygiene 8 Radlation Dept. . 3' Water Treatment Plant (Far Water Smmplos Only)' t' , /,' 30 ,I7 \ I _- ' -I .;35; /z , / /-7 . jj ,j> b :3 cl /1' , i),: A,' . i] NLO-HbS-736 (REV. 10/14~6Or I. .-- . s N A T I O N A L L E A D C O M P A N Y O F O H IO H E A L T H A N D S A F E T Y DIVISION - A N A L Y T I C A L D E P T . A N A L Y T I C A L D A T A S H E E T i. I- . '4 ( '.. /a ' li 4 '. r I if 1. - I :

306

Shorts due to diagnostic leads  

SciTech Connect (OSTI)

The superconducting toroidal field coils that are being tested in the Large Coil Test Facility (LCTF) are heavily instrumented. General Electric coil, a lead wire of an internal sensor became shorted across an estimated three or four turns of the pancake winding. This short occurred during the final stages of the winding fabrication and was not accessible for repair. Resistance, voltage gradient, and transient voltage decay measurements were performed to characterize the short and the magnetic damping of the large steel bobbin and outer structural ring. The 32-gage wire causing the short was estimated to be about 10 cm long, with a resistance of 55 m..cap omega... As a safety measure, we decided to burn out the shorted wire at room temperature before installing the coil in LCTF. Tests were made to determine the energy needed to vaporize a small wire. Computer calculations indicated that within the voltage limits set for the coil, it was not feasible to burn out the wire by rapidly dumping the coil from a low-current dc charge-up. We accomplished the burnout by applying 800 V at 3.25 A, and 60 Hz for about 1 s. Transient voltage decay measurements made after the burnout and compared with those made before the attempt confirmed that the short had indeed been opened.

Ellis, J.F.; Lubell, M.S.; Pillsbury, R.D.; Shen, S.S.; Thome, R.J.; Walstrom, P.L.

1985-03-01T23:59:59.000Z

307

Replace Pressure-Reducing Valves with Backpressure Turbogenerators: Office of Industrial Technologies (OIT) Steam Tip Fact Sheet No. 20  

SciTech Connect (OSTI)

Many industrial facilities produce steam at a higher pressure than is demanded by process requirements. Steam passes through pressure-reducing valves (PRVs, also known as letdown valves) at various locations in the steam distribution system to let down or reduce its pressure. A non-condensing or backpressure steam turbine can perform the same pressure-reducing function as a PRV, while converting steam energy into electrical energy.

Not Available

2002-01-01T23:59:59.000Z

308

Post-Remedial Action Report the Chapman Valve Site E I P I I  

Office of Legacy Management (LM)

for for Post-Remedial Action Report the Chapman Valve Site E I P I I I t I 1 I I I 1 I li I I Pnnted on recycledkecyclable paper 24 19 0186 1 DOE/OW21949-408 Formerly Utilized Sites Remed Contr: al Action Program (FUSRAP) L C t NO. DE-AC05-91 OR21 949 Indian Orchard, assac h.usetts November 1996 DOE/OR/2 1949-408 POST-REMEDIAL ACTION REPORT FOR THE CHAPMAN VALVE SITE INDIAN ORCHARD, MASSACHUSETTS NOVEMBER 1996 Prepared for United States Department of Energy Oak Ridge Operations Office Under Contract No. DE-AC05-91 OR2 1949 Bechtel National, Inc. Oak Ridge, Tennessee . . Bechtel Job No. 14501 CONTENTS Page . FIGURES ................................................................................... 1 .............................................................. iv

309

Effect of reactor conditions on MSIV (main steam isolation valves)-ATWS power level  

SciTech Connect (OSTI)

In a boiling water reactor (BWR) when there is closure of the main steam isolation valves (MSIVs), the energy generated in the core will be transferred to the pressure suppression pool (PSP) via steam flows out of the relief valves. The pool has limited capacity as a heat sink and hence, if there is no reactor trip (an ATWS event), there is the possibility that the pool temperature may rise beyond acceptable limits. The present study was undertaken to determine how the initial reactor conditions affect the power during an MSIV-ATWS event. The time of interest is during the 20-30 minute period when it is assumed that the reactor is in a quasi-equilibrium condition with the water level and pressure fixed, natural circulation conditions and no control rod movement or significant boron in the core. The initial conditions of interest are the time during the cycle and the operating state. 4 refs., 2 tabs.

Diamond, D.J.

1987-01-01T23:59:59.000Z

310

Bimodal switching field distributions in all-perpendicular spin-valve nanopillars  

SciTech Connect (OSTI)

Switching field measurements of the free layer element of 75?nm diameter spin-valve nanopillars reveal a bimodal distribution of switching fields at low temperatures (below 100?K). This result is inconsistent with a model of thermal activation over a single perpendicular anisotropy barrier. The correlation between antiparallel to parallel and parallel to antiparallel switching fields increases to nearly 50% at low temperatures. This reflects random fluctuation of the shift of the free layer hysteresis loop between two different magnitudes, which may originate from changes in the dipole field from the polarizing layer. The magnitude of the loop shift changes by 25% and is correlated to transitions of the spin-valve into an antiparallel configuration.

Gopman, D. B., E-mail: daniel.gopman@physics.nyu.edu; Kent, A. D. [Department of Physics, New York University, New York, New York 10003 (United States); Bedau, D.; Katine, J. A. [HGST San Jose Research Center, San Jose, California 95135 (United States); Mangin, S. [Institut Jean Lamour, UMR CNRS 7198 Université de Lorraine, Nancy (France); Fullerton, E. E. [CMRR, University of California at San Diego, La Jolla, California 92093 (United States)

2014-05-07T23:59:59.000Z

311

Testing of one-inch UF{sub 6} cylinder valves under simulated fire conditions  

SciTech Connect (OSTI)

Accurate computational models which predict the behavior of UF{sub 6} cylinders exposed to fires are required to validate existing firefighting and emergency response procedures. Since the cylinder valve is a factor in the containment provided by the UF{sub 6} cylinder, its behavior under fire conditions has been a necessary assumption in the development of such models. Consequently, test data is needed to substantiate these assumptions. Several studies cited in this document provide data related to the behavior of a 1-inch UF{sub 6} cylinder valve in fire situations. To acquire additional data, a series of tests were conducted at the Paducah Gaseous Diffusion Plant (PGDP) under a unique set of test conditions. This document describes this testing and the resulting data.

Elliott, P.G. [Martin Marietta Energy Systems, Inc., Paducah, KY (United States)

1991-12-31T23:59:59.000Z

312

Solids throttling valves for coal conversion and utilization development. Final report  

SciTech Connect (OSTI)

A complete test system to test, evaluate, and develop control valves for slurry letdown service in coal liquefaction plants is needed. The site identified for the test system was the SRC II Pilot Plant located at Ft. Lewis, Washington. The US Department of Energy, Morgantown Energy Technology Center, requested a test system design that would enable testing of various configuration letdown valves that would be compatible with the existing facility and have minimum impact on Pilot Plant operations. Drawings and specifications for such a test system were prepared, coordinated with Ft. Lewis personnel, revised to reflect Ft. Lewis operating personnel comments, and approved for use by the Morgantown Energy Technology Center. These drawings and specifications will enable the test system to be built, installed, and integrated with the existing facility by a general contractor.

Sine, G.C.

1980-11-01T23:59:59.000Z

313

Project W-314 Specific Test and Evaluation Plan 241-AN-A Valve Pit  

SciTech Connect (OSTI)

The purpose of this Specific Test and Evaluation Plan (STEP) is to provide a detailed written plan for the systematic testing of modifications made to the 241-AN-A Valve Pit by the W-314 Project. The STEP develops the outline for test procedures that verify the system's performance to the established Project design criteria. The STEP is a lower tier document based on the W-314 Test and Evaluation Plan (TEP).

HAMMERS, J.S.

1999-08-25T23:59:59.000Z

314

Mechanisms of bioprosthetic heart valve failure: Fatigue causes collagen denaturation and glycosaminoglycan loss  

E-Print Network [OSTI]

caused progressive damage to the molecular structure of type I collagen as assessed by Fourier transform aortic valve cusps were 65.2 ± 8.66 g uronic acid/10 mg of dry weight for control and 7.91 ± 1.1 g uronic acid/10 mg of dry weight for 10­300 million cycled cusps. Together, these molecular changes contribute

Zand, Robert

315

New York State Regulations  

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

New York New York State Regulations: New York State of New York The primary responsibility for regulating oil and gas activities within New York resides with the Bureau of Oil and Gas Regulation in the Division of Mineral Resources (Office of Natural Resources) of the New York State Department of Environmental Conservation (NYSDEC). Other offices and divisions within the NYSDEC administer the major environmental protection laws. Contact New York State Department of Environmental Conservation Division of Mineral Resources Bureau of Oil and Gas Regulation 625 Broadway, 3rd Floor Albany, NY 12233-6500 (518) 402-8056 (phone) (518) 402-8060 (fax) Disposal Practices and Applicable Regulations Environmental conservation rules and regulations are contained in Title 6 of the Official Compilation of Codes, Rules and Regulations of the State of New York (6 NYCRR). The rules and regulations for oil, gas and solution mining are provided in 6 NYCRR Parts 550-559.

316

Regulators, Requirements, Statutes  

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

Regulators, Requirements, Statutes Regulators, Requirements, Statutes Regulators, Requirements, Statutes The Laboratory must comply with environmental laws and regulations that apply to Laboratory operations. Contact Environmental Communication & Public Involvement P.O. Box 1663 MS M996 Los Alamos, NM 87545 (505) 667-0216 Email Environmental laws and regulations LANL complies with more than 30 state and federal regulations and policies designed to protect human health and the environment. Regulators Regulators Environmental Protection Agency (EPA) EPA Homepage EPA - Region VI U.S. Department of Energy (DOE) DOE Homepage DOE Environmental Policy DOE Citizen's Advisory Board U.S. Fish and Wildlife Service (FWS) Southwest Region 2 New Mexico Environment Department (NMED) NMED Homepage NMED DOE Oversight Office

317

Computer Use Regulation Introduction  

E-Print Network [OSTI]

Computer Use Regulation #12;Introduction · The following training materials will reference the contents of the Computer Use Regulations, but should not serve as a substitute for reading the actual responsibilities NCSU employees have under the regulations. · North Carolina State University's computer networks

Liu, Paul

318

Children and lead: new findings and concerns  

SciTech Connect (OSTI)

An editorial dealing with lead in the environment and its health risks to children is presented. Young children are particularly vulnerable to lead exposure. Through hand-to-mouth activities, such as thumb sucking, nail biting, or eating with dirty hands, lead in house dust and garden soil readily enters their bodies. Children with pica are exposed to more lead because they eat such items as paint chips, broken plaster, and dirt. Moreover, intestinal lead absorption is greater in children than in adults. The author recommends a concerted effort to reduce undue lead absorption in children. (JMT)

Lin-Fu, J.S.

1982-09-02T23:59:59.000Z

319

November 17, 2009 HSS/Union Lead Checkpoint Meeting on Integrated Collaborative Oversight - Overview  

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

Meeting Points HSS Changes to Safety Structure/ HSS Integrated Collaborative Oversight Process * HSS tasked by the Deputy Secretary to lead a collaborative evaluation of, and identify options for, improving regulation/oversight of safety at DOE facilities in response to concerns expressed by the DOE Laboratories and Contractors of stringent regulations impairing competitiveness and impacting resources. * HSS Path Forward: -- Strengthen oversight function [i.e., increase nuclear safety and oversight staff] -- Assess a more effective enforcement tool: mitigation for corrective actions/enhance proactive processes to improve safety and security performance/compliance --- Focus on development of a data analysis model that will look at trends/leading

320

Load regulating expansion fixture  

DOE Patents [OSTI]

A free standing self contained device for bonding ultra thin metallic films, such as 0.001 inch beryllium foils is disclosed. The device will regulate to a predetermined load for solid state bonding when heated to a bonding temperature. The device includes a load regulating feature, whereby the expansion stresses generated for bonding are regulated and self adjusting. The load regulator comprises a pair of friction isolators with a plurality of annealed copper members located therebetween. The device, with the load regulator, will adjust to and maintain a stress level needed to successfully and economically complete a leak tight bond without damaging thin foils or other delicate components. 1 fig.

Wagner, L.M.; Strum, M.J.

1998-12-15T23:59:59.000Z

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


321

Load regulating expansion fixture  

DOE Patents [OSTI]

A free standing self contained device for bonding ultra thin metallic films, such as 0.001 inch beryllium foils. The device will regulate to a predetermined load for solid state bonding when heated to a bonding temperature. The device includes a load regulating feature, whereby the expansion stresses generated for bonding are regulated and self adjusting. The load regulator comprises a pair of friction isolators with a plurality of annealed copper members located therebetween. The device, with the load regulator, will adjust to and maintain a stress level needed to successfully and economically complete a leak tight bond without damaging thin foils or other delicate components.

Wagner, Lawrence M. (San Jose, CA); Strum, Michael J. (San Jose, CA)

1998-01-01T23:59:59.000Z

322

Studies On Advanced Lead-Acid Batteries.  

E-Print Network [OSTI]

??Subsequent to the studies on precursor lead-acid systems by Daniel, Grove and Sindesten, practical lead-acid batteries began with the research and inventions of Raymond Gaston… (more)

Martha, Surendra Kumar

2005-01-01T23:59:59.000Z

323

Explicit regulator maps on polylogarithmic motivic complexes.  

E-Print Network [OSTI]

We define a regulator map from the weight n polylogarithmic motivic complex to the weight n Deligne complex of an algebraic variety X. The regulator map is constructed explicitly via the classical polylogarithms with some funny combinations of Bernoulli numbers as coefficients. This leads to conjectures on special values of L-functions at s=n which reduce to Zagier's conjecture when X is of dimension zero over Q. The cone of this map, shifted by one, should be called the Arakelov motivic complex of X. Its last cohomology group is identified with a group of codimension n Arakelov cycles on X.

A. B. Goncharov

324

Compact, electro-hydraulic, variable valve actuation system providing variable lift, timing and duration to enable high efficiency engine combustion control  

Broader source: Energy.gov [DOE]

Discusses development of advanced variable valve actuation system to enable high efficiency combustion highlighting advances to improving system packaging while reducing cost

325

Alabama State Regulations  

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

State Regulations » Alabama State Regulations » Alabama State Regulations: Alabama State of Alabama The State Oil and Gas Board of Alabama, under the direction of the State Geologist and Oil and Gas Supervisor, is responsible for the regulation of oil and gas operations. The Board is divided into two administrative regions-north and south. The Board has broad authority in Alabama's oil and gas conservation statutes to promulgate and enforce rules and regulations to ensure the conservation and proper development of Alabama's petroleum resources. A major duty of the Board is to prevent pollution of fresh water supplies by oil, gas, salt water, or other contaminants resulting from oil and gas operations. The Alabama Department of Environmental Management (ADEM) administers the major federal environmental protection laws through regulations governing air pollution, water quality and supply, solid and hazardous waste management.

326

Pressure reducing regulator  

DOE Patents [OSTI]

A pressure reducing regulator that controls its downstream or outlet pressure to a fixed fraction of its upstream or inlet pressure is disclosed. The regulator includes a housing which may be of a titanium alloy, within which is located a seal or gasket at the outlet end which may be made of annealed copper, a rod, and piston, each of which may be made of high density graphite. The regulator is insensitive to temperature by virtue of being without a spring or gas sealed behind a diaphragm, and provides a reference for a system in which it is being used. The rod and piston of the regulator are constructed, for example, to have a 1/20 ratio such that when the downstream pressure is less than 1/20 of the upstream pressure the regulator opens and when the downstream pressure exceeds 1/20 of the upstream pressure the regulator closes. 10 figs.

Whitehead, J.C.; Dilgard, L.W.

1995-10-10T23:59:59.000Z

327

TOWARD MORE EFFECTIVE REGULATION  

SciTech Connect (OSTI)

This paper proposes a model relationship between the operator engaged in a hazardous activity, the regulator of that activity, and the general public. The roles and responsibilities of each entity are described in a way that allows effective communication flow. The role of the regulator is developed using the steam boiler as an example of a hazard subject to regulation; however, the model applies to any regulated activity. In this model the safety analyst has the extremely important role of communicating sometimes difficult technical information to the regulator in a way that the regulator can provide credible assurance to the general public as to the adequacy of the control of the hazardous activity. The conclusion asserts that acceptance of the model, understanding of the roles and responsibilities and definition of who communicates what information to whom will mitigate frustration on the part of each of the three entities.

J. GRAF

2000-06-01T23:59:59.000Z

328

SUMMARY OF REGULATIONS IMPLEMENTING FEDERAL POWER ACT SECTION 216 |  

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

SUMMARY OF REGULATIONS IMPLEMENTING FEDERAL POWER ACT SECTION 216 SUMMARY OF REGULATIONS IMPLEMENTING FEDERAL POWER ACT SECTION 216 SUMMARY OF REGULATIONS IMPLEMENTING FEDERAL POWER ACT SECTION 216 The Energy Policy Act of 2005 added section 216(h) to the Federal Power Act providing for the Department of Energy to act as the lead agency for coordinating all applicable Federal authorizations and related environmental reviews required under Federal law in order to site an electric transmission facility. The Act authorized DOE to issue any regulations necessary to implement the provisions of 216(h). SUMMARY OF REGULATIONS IMPLEMENTING FEDERAL POWER ACT SECTION 216 More Documents & Publications SUMMARY OF REGULATIONS IMPLEMENTING FEDERAL POWER ACT SECTION 216 Comments on Notice of Proposed Rulemaking for Coordination of Federal

329

Tidal Wetlands Regulations (Connecticut)  

Broader source: Energy.gov [DOE]

Most activities occurring in or near tidal wetlands are regulated, and this section contains information on such activities and required permit applications for proposed activities. Applications...

330

Air-Quality Regulations  

Science Journals Connector (OSTI)

n...Federal, state and/or local regulations constructed for the purpose of protecting air quality, e.g., low volatile organic compounds...

Jan W. Gooch

2011-01-01T23:59:59.000Z

331

Air-quality regulations  

Science Journals Connector (OSTI)

n....Federal, state and/or local regulations constructed for the purpose of protecting air quality, e.g., low volatile organic compounds...

2007-01-01T23:59:59.000Z

332

Energy Policy 29 (2001) 11331143 Ethanol as a lead replacement: phasing out leaded gasoline in Africa  

E-Print Network [OSTI]

Energy Policy 29 (2001) 1133­1143 Ethanol as a lead replacement: phasing out leaded gasoline cost of lead additives and of gasoline, and the falling cost of ethanol and sugarcane, have created sugarcane is produced in Africa to replace all the lead used in African gasoline; this would require Africa

Thomas, Valerie

333

Low Emissions Asian Development (LEAD) Program - Bangladesh ...  

Open Energy Info (EERE)

Redirect page Jump to: navigation, search REDIRECT Low Emissions Asian Development (LEAD) Program Retrieved from "http:en.openei.orgwindex.php?titleLowEmissionsAsianDevel...

334

Procurement Standards Lead-by-Example Resources  

Broader source: Energy.gov [DOE]

State and local governments can lead by example by promoting energy efficiency programs and policies for public facilities, equipment, and government operations.

335

Building Standards Lead-by-Example Resources  

Broader source: Energy.gov [DOE]

State and local governments can lead by example by promoting energy efficiency programs and policies for public facilities, equipment, and government operations.

336

Lead in Maple Syrup Produced in Connecticut  

Science Journals Connector (OSTI)

Lead in Maple Syrup Produced in Connecticut ... Department of Analytical Chemistry, The Connecticut Agricultural Experiment Station, P.O. ... Box 1106, New Haven, Connecticut 06504 ...

David E. Stilwell; Craig L. Musante

1996-10-17T23:59:59.000Z

337

Energy Efficiency Lead-by-Example Resources  

Broader source: Energy.gov [DOE]

State and local governments can lead by example by promoting energy efficiency programs and policies for public facilities, equipment, and government operations.

338

A characterization of check valve degradation and failure experience in the nuclear power industry: 1991 Failures, Volume 2  

SciTech Connect (OSTI)

Review and characterization of check valve failures taken from the Institute of Nuclear Power Operation`s Nuclear Plant Reliability Data System was performed in accordance with part two of a three-phase project sponsored by the US Nuclear Regulatory Commission. The analysis was performed for check valve failures occurring in 1991 and is intended to update the previous analysis performed for the time period 1984--1990. To maintain consistency and for ease of the 1991 analysis presents the same parameters and cross-correlations in essentially the same format as the 1984--1990 study. Additional data was obtained for the 1991 analysis, including information related to specific check valve type. This information is presented in a separate section of the report.

McElhaney, K.L. [Oak Ridge National Lab., TN (United States)

1995-07-01T23:59:59.000Z

339

488 Brazilian Journal of Physics, vol. 36, no. 2A, June, 2006 Spin Valve Effect and Hall Resistance in a Wide Parabolic Well  

E-Print Network [OSTI]

488 Brazilian Journal of Physics, vol. 36, no. 2A, June, 2006 Spin Valve Effect and Hall Resistance: Spin valve; Hall resistance; AlcGa1-cAs parabolic wells I. INTRODUCTION The Hall effect is very known by the formula Rxy = R0B+RSM, where B is ap- plied magnetic field, R0 is the ordinary Hall coefficient, and RS

Gusev, Guennady

340

The Numerically Optimized Regulator and the Functional Renormalization Group  

E-Print Network [OSTI]

We aim to optimize the functional form of the compactly supported smooth (CSS) regulator within the functional renormalization group (RG), in the framework of bosonized two-dimensional Quantum Electrodynamics (QED_2) and of the three-dimensional O(N=1) scalar field theory in the local potential approximation (LPA). The principle of minimal sensitivity (PMS) is used for the optimization of the CSS regulator, recovering all the major types of regulators in appropriate limits. Within the investigated class of functional forms, a thorough investigation of the CSS regulator, optimized with two different normalizations within the PMS method, confirms that the functional form of a regulator first proposed by Litim is optimal within the LPA. However, Litim's exact form leads to a kink in the regulator function. A form of the CSS regulator, numerically close to Litim's limit while maintaining infinite differentiability, remains compatible with the gradient expansion to all orders. A smooth analytic behaviour of the regulator is ensured by a small, but finite value of the exponential fall-off parameter in the CSS regulator. Consequently, a compactly supported regulator, in a parameter regime close to Litim's optimized form, but regularized with an exponential factor, appears to have favorable properties and could be used to address the scheme dependence of the functional renormalization group, at least within the the approximations employed in the studies reported here.

I. G. Marian; U. D. Jentschura; I. Nandori

2013-11-28T23:59:59.000Z

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


341

A study to determine the most effective actuation valve and water distribution head combination for emergency showers  

E-Print Network [OSTI]

for corrosion and wear. Pressure test to determine strength. (5) Remove shower head and dismantle. Clean scale and rust, from the head inlet and from the slots or orifices in the baffle plate. (6) Reassemble. (7) Open OSBY valve and replace seal..., and orifice sprinkler water distribution heads to determine which valve/head combination produced the greatest flow rate at varying static water pressures. Flow rates were measured at static pressures of 20, 30. 40, 50, and 60 pounds per square inch gauge...

Presswood, James Columbus

1977-01-01T23:59:59.000Z

342

Analysis of an extremely fast valve opening camless system to improve transient performance in a turbocharged high speed direct injection diesel engine  

Science Journals Connector (OSTI)

This article describes a theoretical study on the performance optimisation of a high speed direct injection turbocharged diesel engine equipped with an electro-hydraulic variable valve actuation 'camless' system. This system provides extremely fast valve opening and closing slopes. Thus, its potential for recovering part of the energy lost in the valves by reducing gas flow sonic conditions in the valve throat has been investigated. This study has been mainly focused on the analysis of engine performance during a load transient evolution, but the full load steady state attained at the end of the load transient has been also discussed. The results of this investigation have confirmed important improvements in engine performance during the load transient owing to less energy being lost across the valves, which directly results in more energy being available in the turbine. This benefit has also been observed at full load steady state conditions.

J. Benajes; J.R. Serrano; V. Dolz; R. Novella

2009-01-01T23:59:59.000Z

343

Helium ion beam milling to create a nano-structured domain wall magnetoresistance spin valve  

Science Journals Connector (OSTI)

We have fabricated and measured single domain wall magnetoresistance devices with sub-20 nm gap widths using a novel combination of electron beam lithography and helium ion beam milling. The measurement wires and external profile of the spin valve are fabricated by electron beam lithography and lift-off. The critical bridge structure is created using helium ion beam milling, enabling the formation of a thinner gap (and so a narrower domain wall) than that which is possible with electron beam techniques alone. Four-point probe resistance measurements and scanning electron microscopy are used to characterize the milled structures and optimize the He ion dose. Successful operation of the device as a spin valve is demonstrated, with a 0.2% resistance change as the external magnetic field is cycled. The helium ion beam milling efficiency as extracted from electrical resistance measurements is 0.044 atoms/ion, about half the theoretical value. The gap in the device is limited to a maximum of 20 nm with this technique due to sub-surface swelling caused by injected ions which can induce catastrophic failure in the device. The fine patterning capabilities of the helium ion microscope milling technique indicate that sub-5 nm constriction widths could be possible.

Yudong Wang; S A Boden; D M Bagnall; H N Rutt; C H de Groot

2012-01-01T23:59:59.000Z

344

Fan-fold shielded electrical leads  

DOE Patents [OSTI]

Disclosed are fan-folded electrical leads made from copper cladded Kapton, for example, with the copper cladding on one side serving as a ground plane and the copper cladding on the other side being etched to form the leads. The Kapton is fan folded with the leads located at the bottom of the fan-folds. Electrical connections are made by partially opening the folds of the fan and soldering, for example, the connections directly to the ground plane and/or the lead. The fan folded arrangement produces a number of advantages, such as electrically shielding the leads from the environment, is totally non-magnetic, and has a very low thermal conductivity, while being easy to fabricate. 3 figs.

Rohatgi, R.R.; Cowan, T.E.

1996-06-11T23:59:59.000Z

345

Indiana State Regulations  

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

Indiana Indiana State Regulations: Indiana State of Indiana The Indiana Department of Natural Resources (DNR) Division of Oil and Gas regulates petroleum exploration, production, and site abandonment activities, underground injection control, test hole drilling, and geophysical surveying operations. Otherwise, the Indiana Department of Environmental Management (IDEM) administers the major environmental protection laws. Contact Division of Oil and Gas (Indianapolis Central Office) 402 West Washington Street, Room 293 Indianapolis, IN 46204 (317) 232-4055 (phone) (317) 232-1550 (fax) (Division Contacts) Indiana Department of Environmental Management P.O. Box 6015 Indianapolis, IN 46206-6015 (317) 232-8603 (phone) (317) 233-6647 (fax) Disposal Practices and Applicable Regulations

346

Loss of cardiac microRNA-mediated regulation leads to dilated cardiomyopathy and heart failure  

E-Print Network [OSTI]

Rationale: Heart failure is a deadly and devastating disease that places immense costs on an aging society. To develop therapies aimed at rescuing the failing heart, it is important to understand the molecular mechanisms ...

Rao, Prakash K.

347

Sustainability Peer Educator Group Lead Positions Position: Sustainability Peer Educators Group Lead  

E-Print Network [OSTI]

Sustainability Peer Educator Group Lead Positions Position: Sustainability Peer Educators Group times) Term of position: September 2013 ­ April 2014 Position Summary: Working with the Sustainability Project Coordinator, the Sustainability Peer Educator Group Leads will be responsible

Boonstra, Rudy

348

Interviewee Travel Regulations Scope  

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

3/2012 3/2012 Interviewee Travel Regulations Scope These regulations apply to the reimbursement of round-trip travel expenses incurred by interviewees. These regulations do not apply to applicants who live within a 50-mile radius of Los Alamos based on the Rand McNally Standard Highway Mileage Guide. Reimbursement With the exception of airfare, interviewees will be reimbursed for travel expenses according to Federal travel regulations. For interviewees, airfare reimbursement is limited to the lesser of the standard coach airfare or the actual amount paid. The lowest available airfare should be obtained based on the official business dates and locations. The reimbursement amount will be based on the most direct route available between the interviewee's residence and the laboratory. Costs incurred over the lowest available fare will be the

349

New Mexico State Regulations  

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

New Mexico New Mexico State Regulations: New Mexico State of New Mexico The Oil Conservation Division (OCD) in the New Mexico Energy, Minerals and Natural Resources Department regulates oil and gas and geothermal operations in New Mexico. The OCD has the responsibility to gather oil and gas production data, permit new wells, establish pool rules and oil and gas allowables, issue discharge permits, enforce rules and regulations of the division, monitor underground injection wells and ensure that abandoned wells are properly plugged and the land is responsibly restored. Otherwise, the New Mexico Environment Department (NMED) administers the major environmental protection laws. The Water Quality Control Commission (WQCC), which is administratively attached to the NMED, assigns responsibility for administering its regulations to constituent agencies, including the OCD.

350

GUIDANCE REGARDING NEPA REGULATIONS  

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

This memorandum was published in the Federal Register and appears at 48 Fed. Reg. 34263 (1983). Ed. Note] This memorandum was published in the Federal Register and appears at 48 Fed. Reg. 34263 (1983). Ed. Note] GUIDANCE REGARDING NEPA REGULATIONS 40 CFR Part 1500 Executive Office of the President Council on Environmental Quality 722 Jackson Place, N.W. Washington, D.C. 20006 July 22, 1983 Memorandum For: Heads of Federal Agencies From: A. Alan Hill, Chairman Re: Guidance Regarding NEPA Regulations The Council on Environmental Quality (CEQ) regulations implementing the National Environmental Policy Act (NEPA) were issued on November 29, 1978. These regulations became effective for, and binding upon, most federal agencies on July 30, 1979, and for all remaining federal agencies on November 30, 1979. As part of the Council's NEPA oversight responsibilities it solicited through an August 14,

351

Virginia State Regulations  

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

Virginia Virginia State Regulations: Virginia State of Virginia The Division of Gas and Oil in the Virginia Department of Mines, Minerals and Energy (DMME) regulates the effects of gas and oil operations both on and below the surface. The Virginia Gas and Oil Board is to foster, encourage, and promote the safe and efficient exploration for and development, production, and utilization of gas and oil resources. Otherwise, three regulatory citizen boards are responsible for adopting Virginia 's environmental regulations. The Virginia Department of Environmental Quality (DEQ) staff administers the regulations as approved by the boards. Finally, the U.S. Environmental Protection Agency (EPA) Region 3, through its Water Protection Division, administers Class II underground injection control (UIC) programs in Virginia in direct implementation.

352

California Energy Commission REGULATIONS  

E-Print Network [OSTI]

California Energy Commission REGULATIONS NONRESIDENTIAL BUILDING ENERGY Office Manager High Performance Buildings and Standards Development Office Dave Ashuckian Deputy Director Efficiency and Renewable Energy Division Robert Oglesby Executive Director DISCLAIMER

353

A Furnace Temperature Regulator  

Science Journals Connector (OSTI)

Synopsis.—By making the heating coil of an electric furnace one arm of a wheatstone bridge, and combining this with a galvanometer regulator, thus keeping constant the resistance of the coil, we can, regardless of variations in the current supply, and with no attention, maintain constant the temperature of furnaces not too directly influenced by the temperature of the room, or where the surrounding air is kept constant. The power available in this regulator is relatively very great indeed; nothing has to be inserted within the furnace cavity, and the lag is practically nothing; the regulator is often almost at its best under conditions most unfavorable to other regulators. It has held a small furnace constant to 0.1° for hours at temperatures from 500° to 1400°.

Walter P. White and Leason H. Adams.

1919-07-01T23:59:59.000Z

354

Solid state differential temperature regulator for a solar heating system  

SciTech Connect (OSTI)

A solid state temperature regulator is provided for a solar heating system for use in conjunction with a swimming pool, or the like. The solar swimming pool heating system includes the usual components, namely, a pump, a filter, and a collector, and in which the pump serves to circulate the water from the pool through the filter and collector and back into the pool. The system also includes additional components, namely, temperature sensors for the collector and for the circulated pool water, appropriate valves, and a solid state control circuit. The solid state control circuit responds to predetermined temperature differences sensed by the sensors to cause the pool water to be circulated through the collector so long as the collector is at a higher temperature than the circulated pool water, and which causes the circulated pool water to by-pass the collector when the temperature of the collector drops below the temperature of the circulated pool water. The control circuit also has a high temperature cut-off control which activates the valves to cause the circulated pool water to by-pass the collector when the temperature of the circulated pool water exceeds a particular threshold. The control circuit also includes a mode switch which may be actuated to reverse the action of the system, causing the pool water to be circulated through the collector when the collector temperature is lower than the pool water temperature, for example, at night following a hot day, in which the collector radiates to the black sky, whereby the collector can be used to cool the water in the pool.

Firebaugh, D.C.

1980-04-01T23:59:59.000Z

355

Energy-Saving Adaptive Robust Motion Control of Single-Rod Hydraulic Cylinders with Programmable Valves 1  

E-Print Network [OSTI]

- ety's need for energy conservation while without sacrificing the achievable motion control accuracy that the meter-in and meter-out orifices are mechanically linked together in a typical directional control valve of activities in industry on breaking the mechanical linkage between the meter-in and meter-out orifices

Yao, Bin

356

Energy-Saving Control of Single-Rod Hydraulic Cylinders with Programmable Valves and Improved Working Mode Selection  

E-Print Network [OSTI]

Energy-Saving Control of Single-Rod Hydraulic Cylinders with Programmable Valves and Improved. ABSTRACT This paper studies the energy-saving adaptive robust precision motion control of a single and individual cylinder chamber pressure control for better energy saving. With a typical four-way directional

Yao, Bin

357

Combustion Phasing Model for Control of a Gasoline-Ethanol Fueled SI Engine with Variable Valve Timing  

E-Print Network [OSTI]

Combustion Phasing Model for Control of a Gasoline-Ethanol Fueled SI Engine with Variable Valve engine efficiency. Fuel-flexible engines permit the increased use of ethanol-gasoline blends. Ethanol points across the engine operating range for four blends of gasoline and ethanol. I. INTRODUCTION Fuel

358

High-speed and bi-stable electrolysis-bubble actuated planar micro gate valves are demonstrated in this paper.  

E-Print Network [OSTI]

SUMMARY High-speed and bi-stable electrolysis-bubble actuated planar micro gate valves are demonstrated in this paper. The speed of previous low power planar microvalves was limited by the bubble collapse process. In addition bi-stability was unreliable. In this work, surface tension is used

Liepmann, Dorian

359

Property:LeadAgency | Open Energy Information  

Open Energy Info (EERE)

LeadAgency LeadAgency Jump to: navigation, search Property Name LeadAgency Property Type Page Pages using the property "LeadAgency" Showing 25 pages using this property. (previous 25) (next 25) B BLM-NV-WN-ES-08-01-1310, NV-020-08-01 + BLM + C CA-017-05-051 + BLM + CA-170-02-15 + BLM + CA-650-2005-086 + BLM + CA-670-2010-107 + BLM + CA-670-2010-CX + BLM + CA-96062042 + United States Forest Service + D DOE-EA-1116 + United States Department of Energy + DOE-EA-1621 + United States Department of Energy + DOE-EA-1676 + United States Department of Energy + DOE-EA-1733 + United States Department of Energy + DOE-EA-1759 + United States Department of Energy + DOE-EA-1849 + United States Department of Energy + DOE-EA-1961 + United States Department of Energy +

360

Lightweight, durable lead-acid batteries  

DOE Patents [OSTI]

A lightweight, durable lead-acid battery is disclosed. Alternative electrode materials and configurations are used to reduce weight, to increase material utilization and to extend service life. The electrode can include a current collector having a buffer layer in contact with the current collector and an electrochemically active material in contact with the buffer layer. In one form, the buffer layer includes a carbide, and the current collector includes carbon fibers having the buffer layer. The buffer layer can include a carbide and/or a noble metal selected from of gold, silver, tantalum, platinum, palladium and rhodium. When the electrode is to be used in a lead-acid battery, the electrochemically active material is selected from metallic lead (for a negative electrode) or lead peroxide (for a positive electrode).

Lara-Curzio, Edgar (Lenoir City, TN); An, Ke (Knoxville, TX); Kiggans, Jr., James O. (Oak Ridge, TN); Dudney, Nancy J. (Knoxville, TN); Contescu, Cristian I. (Knoxville, TN); Baker, Frederick S. (Oak Ridge, TN); Armstrong, Beth L. (Clinton, TN)

2011-09-13T23:59:59.000Z

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


361

Lightweight, durable lead-acid batteries  

SciTech Connect (OSTI)

A lightweight, durable lead-acid battery is disclosed. Alternative electrode materials and configurations are used to reduce weight, to increase material utilization and to extend service life. The electrode can include a current collector having a buffer layer in contact with the current collector and an electrochemically active material in contact with the buffer layer. In one form, the buffer layer includes a carbide, and the current collector includes carbon fibers having the buffer layer. The buffer layer can include a carbide and/or a noble metal selected from of gold, silver, tantalum, platinum, palladium and rhodium. When the electrode is to be used in a lead-acid battery, the electrochemically active material is selected from metallic lead (for a negative electrode) or lead peroxide (for a positive electrode).

Lara-Curzio, Edgar; An, Ke; Kiggans, Jr., James O; Dudney, Nancy J; Contescu, Cristian I; Baker, Frederick S; Armstrong, Beth L

2013-05-21T23:59:59.000Z

362

INEEL Lead Recycling in a Moratorium Environment  

SciTech Connect (OSTI)

Since 1999, the Idaho National Engineering and Environmental Laboratory (INEEL) Lead Project successfully recycled over 700,000 pounds of excess INEEL lead to the private sector. On February 14, 2000, the Secretary of Energy, Bill Richardson, formalized the January 12, 2000, moratorium on recycling radioactive scrap metal that prevented the unrestricted release of recycled scrap metals to the private sector. This moratorium created significant problems for the INEEL lead recycling program and associated plans; however, through the cooperative efforts of the INEEL and Idaho State University as well as innovative planning and creative thinking the recycling issues were resolved. This collaboration has recycled over 160,000 pounds of excess lead to Idaho State University with a cost savings of over $.5M.

Kooda, K. E.; Galloway, K.; McCray, C. W.; Aitken, D. W.

2003-02-26T23:59:59.000Z

363

INEEL Lead Recycling in a Moratorium Environment  

SciTech Connect (OSTI)

Since 1999, the Idaho National Engineering and Environmental Laboratory (INEEL) Lead Project successfully recycled over 700,000 pounds of excess INEEL lead to the private sector. On February 14, 2000, the Secretary of Energy, Bill Richardson, formalized the January 12, 2000, moratorium on recycling radioactive scrap metal that prevented the unrestricted release of recycled scrap metals to the private sector. This moratorium created significant problems for the INEEL lead recycling program and associated plans; however, through the cooperative efforts of the INEEL and Idaho State University as well as innovative planning and creative thinking the recycling issues were resolved. This collaboration has recycled over 160,000 pounds of excess lead to Idaho State University with a cost savings of over $.5M.

Kooda, Kevin Evan; Mc Cray, Casey William; Aitken, Darren William; Galloway, Kelly

2003-02-01T23:59:59.000Z

364

Richard Gerber! NERSC! User Services Group Lead  

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

Group Lead Debugging and Optimization Tools Thanks t o W oo---Sun Y ang a nd H elen H e Outline * Take---Aways * Debugging * Performance O p:miza:on * NERSC " automa:c" t ools...

365

Primer on lead-acid storage batteries  

SciTech Connect (OSTI)

This handbook was developed to help DOE facility contractors prevent accidents caused during operation and maintenance of lead-acid storage batteries. Major types of lead-acid storage batteries are discussed as well as their operation, application, selection, maintenance, and disposal (storage, transportation, as well). Safety hazards and precautions are discussed in the section on battery maintenance. References to industry standards are included for selection, maintenance, and disposal.

NONE

1995-09-01T23:59:59.000Z

366

Fuel additive programs at crossroads of regulation, market dynamics  

SciTech Connect (OSTI)

Fuel additive manufacturers, gasoline marketers and automakers seem to be forgetting about the power of the marketplace in their efforts to use additives to help reduce emissions and improve vehicle performance. Recall that the port fuel injector (PFI) and intake valve deposit (IVD) problems of the 1980s were addressed quickly by the fuels industry. In just a few months after the PFID problem surfaced, additive makers had detergents on the market, and fuel marketers followed up with an effective advertising campaign. Formal regulations came about a decade later. The solution to the BMW IVD problem was similar. BMW provided an enticing incentive for oil companies to differentiate through better additives and many did. Contrast those developments with the command-and-control approach that has been in effect since January 1995. EPA`s additive rule is working almost to perfection - if adherence to strict rules is considered. All gasolines in the US are additized, and a wide variety of packages have been developed that meet the regulatory standards. But by the measure of real-world performance, the circumstances can look quite different. And with industry finalizing a better IVD test and conducting research into the need for a combustion chamber deposit (CCD) regulation, now may be the time to limit the regulatory approach and let refiners and additive suppliers return to creating products that target excellence instead of regulatory minimums.

Adler, K.

1998-01-01T23:59:59.000Z

367

Investigation Of Adhesion Formation In New Stainless Steel Trim Spring Operated Pressure Relief Valves  

SciTech Connect (OSTI)

Examination of proof test data for new (not previously installed) stainless steel (SS) trim spring operated pressure relief valves (SOPRV) reveals that adhesions form between the seat and disc in about 46% of all such SOPRV. The forces needed to overcome these adhesions can be sufficiently large to cause the SOPRV to fail its proof test (FPT) prior to installation. Furthermore, a significant percentage of SOPRV which are found to FPT are also found to ''fail to open'' (FTO) meaning they would not relief excess pressure in the event of an overpressure event. The cases where adhesions result in FTO or FPT appear to be confined to SOPRV with diameters < 1 in and set pressures < 150 psig and the FTO are estimated to occur in 0.31% to 2.00% of this subpopulation of SS trim SOPRV. The reliability and safety implications of these finding for end-users who do not perform pre-installation testing of SOPRV are discussed.

Gross, Robert E. [Savannah River Site (SRS), Aiken, SC (United States); Bukowski, Julia V. [Villanova University, Villanova, PA (United States); Goble, William M. [exida, Sellersville, PA (United States)

2013-04-16T23:59:59.000Z

368

Electron-electron interaction, weak localization and spin valve effect in vertical-transport graphene devices  

SciTech Connect (OSTI)

We fabricated a vertical structure device, in which graphene is sandwiched between two asymmetric ferromagnetic electrodes. The measurements of electron and spin transport were performed across the combined channels containing the vertical and horizontal components. The presence of electron-electron interaction (EEI) was found not only at low temperatures but also at moderate temperatures up to ?120?K, and EEI dominates over weak localization (WL) with and without applying magnetic fields perpendicular to the sample plane. Moreover, spin valve effect was observed when magnetic filed is swept at the direction parallel to the sample surface. We attribute the EEI and WL surviving at a relatively high temperature to the effective suppress of phonon scattering in the vertical device structure. The findings open a way for studying quantum correlation at relatively high temperature.

Long, Mingsheng; Gong, Youpin; Wei, Xiangfei; Zhu, Chao; Xu, Jianbao; Liu, Ping; Guo, Yufen; Li, Weiwei; Liu, Liwei, E-mail: lwliu2007@sinano.ac.cn [Key Laboratory of Nanodevices and Applications-CAS and Collaborative Innovation Center of Suzhou Nano Science and Technology, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences (CAS), Suzhou 215123 (China); Liu, Guangtong [Institute of Physics, Chinese Academy of Sciences, Beijing 100190 (China)

2014-04-14T23:59:59.000Z

369

THE EFFECTS OF MAINTENANCE ACTIONS ON THE PFDavg OF SPRING OPERATED PRESSURE RELIEF VALVES  

SciTech Connect (OSTI)

The safety integrity level (SIL) of equipment used in safety instrumented functions is determined by the average probability of failure on demand (PFDavg) computed at the time of periodic inspection and maintenance, i.e., the time of proof testing. The computation of PFDavg is generally based solely on predictions or estimates of the assumed constant failure rate of the equipment. However, PFDavg is also affected by maintenance actions (or lack thereof) taken by the end user. This paper shows how maintenance actions can affect the PFDavg of spring operated pressure relief valves (SOPRV) and how these maintenance actions may be accounted for in the computation of the PFDavg metric. The method provides a means for quantifying the effects of changes in maintenance practices and shows how these changes impact plant safety.

Harris, S.; Gross, R.

2014-04-01T23:59:59.000Z

370

Thermal engineering of non-local resistance in lateral spin valves  

SciTech Connect (OSTI)

We study the non-local spin transport in Permalloy/Cu lateral spin valves (LSVs) fabricated on thermally oxidized Si and MgO substrates. While these LSVs show the same magnitude of spin signals, significant substrate dependence of the baseline resistance was observed. The baseline resistance shows much weaker dependence on the inter-electrode distance than that of the spin transport observed in the Cu wires. A simple analysis of voltage-current characteristics in the baseline resistance indicates the observed result can be explained by a combination of the Peltier and Seebeck effects at the injector and detector junctions, suggesting the usage of high thermal conductivity substrate (or under-layer) is effective to reduce the baseline resistance.

Kasai, S., E-mail: KASAI.Shinya@nims.go.jp; Takahashi, Y. K. [National Institute for Materials Science (NIMS), 1-2-1 Sengen, Tsukuba 305-0047 (Japan); Hirayama, S.; Mitani, S.; Hono, K. [National Institute for Materials Science (NIMS), 1-2-1 Sengen, Tsukuba 305-0047 (Japan); Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba 305-0006 (Japan); Adachi, H.; Ieda, J.; Maekawa, S. [Advanced Science Research Center, Japan Atomic Energy Agency, Tokai 319-1195 (Japan); CREST, Japan Science and Technology Agency, Sanbancho, Tokyo 102-0075 (Japan)

2014-04-21T23:59:59.000Z

371

The cultural parameters of lead poisoning: A medical anthropologist's view of intervention in environmental lead exposure  

SciTech Connect (OSTI)

This article identifies four culturally shaped sources of lead exposure in human societies: modern and historic technological sources; food habits; culturally defined health beliefs; and beauty practices. Examples of these potential sources of lead poisoning are presented from current cultures. They include the use of lead-glazed cooking pottery in Mexican-American households; folk medical use of lead in Hispanic, Arabic, South Asian, Chinese, and Hmong communities; as well as the use of lead as a cosmetic in the Near East, Southeast Asia, and South Asia. Four interacting cultural conditions that create barriers to the reduction of lead exposure and lead poisoning are identified and discussed. These are knowledge deficiencies, communication resistance, cultural reinterpretations, and incongruity of explanatory models.

Trotter, R.T. II (Northern Arizona Univ., Flagstaff (USA))

1990-11-01T23:59:59.000Z

372

Sandia National Laboratories: Due Diligence on Lead Acid Battery...  

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

Due Diligence on Lead Acid Battery Recycling March 23, 2011 Lead Acid Batteries on secondary containment pallet Lead Acid Batteries on secondary containment pallet In 2004, the US...

373

Wyoming State Regulations  

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

Wyoming Wyoming State Regulations: Wyoming State of Wyoming The Wyoming Oil and Gas Conservation Commission (WOGCC) is the state agency authorized to regulate oil and gas exploration and production waste. The Wyoming Department of Environmental Quality (DEQ) administers general environmental protection regulations. Contact Wyoming Oil and Gas Conservation Commission 2211 King Blvd. Casper, WY 82602 (street address) P.O. Box 2640 Casper, WY 82602 (mailing address) (307) 234-7147 (phone) (307) 234-5306 (fax) Wyoming Department of Environmental Quality 122 West 25th Street, Herscheler Building Cheyenne, WY 82002 (307) 777-7937 (phone) (307) 777-7682 (fax) Disposal Practices and Applicable Regulations Document # 4855, Agency (Oil and Gas Conservation Commission), General Agency, Board or Commission Rules, Chapter 4 (Environmental Rules, Including Underground Injection Control Program Rules for Enhanced Recovery and Disposal Projects), Section 1. Pollution and Surface Damage (Forms 14A and 14B) of the Wyoming Rules and Regulations contains the environmental rules administered by the WOGCC with respect to management options for exploration and production waste.

374

NERSC seeks Computational Systems Group Lead  

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

seeks Computational Systems Group Lead seeks Computational Systems Group Lead NERSC seeks Computational Systems Group Lead January 6, 2011 by Katie Antypas Note: This position is now closed. The Computational Systems Group provides production support and advanced development for the supercomputer systems at NERSC. Manage the Computational Systems Group (CSG) which provides production support and advanced development for the supercomputer systems at NERSC (National Energy Research Scientific Computing Center). These systems, which include the second fastest supercomputer in the U.S., provide 24x7 computational services for open (unclassified) science to world-wide researchers supported by DOE's Office of Science. Duties/Responsibilities Manage the Computational Systems Group's staff of approximately 10

375

Leading By Example | Department of Energy  

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

Leading By Example Leading By Example Leading By Example November 3, 2011 - 3:08pm Addthis New cool roofs installed on the Energy Department’s headquarters building in Washington DC in November, 2010. | Image credit Quentin Kruger, Energy Department New cool roofs installed on the Energy Department's headquarters building in Washington DC in November, 2010. | Image credit Quentin Kruger, Energy Department Brian Costlow Director, Office of Administration Brian Costlow has won several awards for his work recently, including the Federal Energy and Water Management Award and the Energy Department Energy Management Award for Exceptional Service for his efforts to make the Department's headquarter buildings models of sustainability. Every day, employees across the Energy Department work to make America more

376

Leading By Example | Department of Energy  

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

Leading By Example Leading By Example Leading By Example November 3, 2011 - 3:08pm Addthis New cool roofs installed on the Energy Department’s headquarters building in Washington DC in November, 2010. | Image credit Quentin Kruger, Energy Department New cool roofs installed on the Energy Department's headquarters building in Washington DC in November, 2010. | Image credit Quentin Kruger, Energy Department Brian Costlow Director, Office of Administration Brian Costlow has won several awards for his work recently, including the Federal Energy and Water Management Award and the Energy Department Energy Management Award for Exceptional Service for his efforts to make the Department's headquarter buildings models of sustainability. Every day, employees across the Energy Department work to make America more

377

Leading Teams and Projects | Department of Energy  

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

Leading Teams and Projects Leading Teams and Projects Leading Teams and Projects February 18, 2014 8:30AM EST to February 19, 2014 4:00PM EST Registration Procedure: Please use the Corporate Human Resource Information System (CHRIS) Workflow process to request training enrollment. Session: 002487 Course Code: 0001. Cost $400. For organizations not currently using the CHRIS workflow process, please follow your existing interoffice training registration process. The Office of Learning and Workforce Development (HC-20) will assess the course cost for this training session directly through each Headquarters organization's Working Capital Fund account. Field office participants should register via CHRIS. They should ensure to note the cost of the training course in the tuition field of the training request.

378

Thermoforming plastic in lead shield construction  

SciTech Connect (OSTI)

Radiation treatments using low energy X-rays or electrons frequently require a final field defining shield to be placed on the patient's skin. A custom made lead cut-out is used to provide a close fit to a particular patient's surface contours. We have developed a procedure which utilizes POLYFORM thermoplastic to obtain a negative mold of the patient instead of the traditional plaster bandage or dental impression gel. The Polyform is softened in warm water, molded carefully over the patient's surface, and is removed when set or hardened, usually within five minutes. Then lead sheet cut-outs can be formed within this negative. For shielding cut-outs requiring thicker lead sheet, a positive is made from dental stone using this Polyform negative. We have found this procedure to be neat, fast and comfortable for both patient and the dosimetrist.

Abrahams, M.E.; Chow, C.H.; Loyd, M.D. (Univ. of Texas Medical Branch, Galveston (USA))

1989-09-01T23:59:59.000Z

379

Leading Edge Technologies Inc | Open Energy Information  

Open Energy Info (EERE)

Leading Edge Technologies Inc Leading Edge Technologies Inc Jump to: navigation, search Name Leading Edge Technologies Inc Place Lakeland, Florida Product Profitable manufacturer of lithium ion batteries for consumer electronics makers that merged with Skylab Technologies Group Inc in September 2001 to form Solicore. Coordinates 35.264796°, -89.724114° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":35.264796,"lon":-89.724114,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

380

Regulation and function of the Rho GTPase mediated signaling pathways in metastasis and lenticular differentiation  

E-Print Network [OSTI]

effector, SRF, have been shown to be key regulators in lens cell differentiation, possibly leading to lens opacification via its transcriptional control of the structural crystallins within the lens. The results of this dissertation research have made...

Mitchell, Dianne Courtenay

2007-09-17T23:59:59.000Z

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


381

Regulation of mTOR complex 1 in response to growth factors and nutrients  

E-Print Network [OSTI]

In multicellular organisms, cells ensure the simultaneous availability of growth factors and nutrients before they invest in cellular processes that lead to growth. The TOR kinase is a master regulator of cellular growth ...

Sancak, Yasemin S. (Yasemin Shechner)

2010-01-01T23:59:59.000Z

382

Polonium release from an ATW burner system with liquid lead-bismuth coolant  

SciTech Connect (OSTI)

The authors analyzed polonium release hazards in a conceptual pool-type ATW burner with liquid lead-bismuth eutectic (LBE) coolant. Simplified quantitative models are used based on experiments and real NPP experience. They found little Po contamination outside the burner under normal operating conditions with nominal leakage from the gas system. In sudden gas leak and/or coolant spill accidents, the P contamination level can reach above the regulation limit but short exposure would not lead to severe health consequences. They are evaluating and developing mitigation methods.

Li, N. [Los Alamos National Lab., NM (United States); Yefimov, E.; Pankratov, D. [Inst. of Physics and Power Engineering, Obninsk (Russian Federation)

1998-04-01T23:59:59.000Z

383

Michigan State Regulations  

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

Michigan Michigan State Regulations: Michigan State of Michigan The Michigan Department of Environmental Quality (DEQ), through the Supervisor of Wells, Geological and Land Management Division (GLM), oversees the regulation of oil and gas activities. DEQ staff monitors the environmental impacts of well drilling operations, oil and gas production facilities, and gas storage wells. Contact Michigan Department of Environmental Quality Geological and Land Management Division P.O. Box 30256 Lansing, MI 48909-7756 (517) 241-1515 (phone) (517) 241-1601 (fax) (Organization Chart) Disposal Practices and Applicable Regulations The rules governing oil and gas operations are contained in Part 615, Rules 324.101-324.1301 (Department of Environmental Quality, Oil and Gas Operations) of the Michigan Administrative Code.

384

Surreptitious Lead Exposure from an Asian Indian Medication  

Science Journals Connector (OSTI)

......case-report Case Report Surreptitious Lead Exposure from an...during routine biological monitoring for lead exposure conducted...the general public. Surreptitious lead exposure from an...during routine biological monitoring for lead exposure conducted......

Leon A. Saryan

1991-01-01T23:59:59.000Z

385

Regulated underground storage tanks  

SciTech Connect (OSTI)

This guidance package is designed to assist DOE Field operations by providing thorough guidance on the underground storage tank (UST) regulations. (40 CFR 280). The guidance uses tables, flowcharts, and checklists to provide a roadmap'' for DOE staff who are responsible for supervising UST operations. This package is tailored to address the issues facing DOE facilities. DOE staff should use this guidance as: An overview of the regulations for UST installation and operation; a comprehensive step-by-step guidance for the process of owning and operating an UST, from installation to closure; and a quick, ready-reference guide for any specific topic concerning UST ownership or operation.

Not Available

1992-06-01T23:59:59.000Z

386

Regulated underground storage tanks  

SciTech Connect (OSTI)

This guidance package is designed to assist DOE Field operations by providing thorough guidance on the underground storage tank (UST) regulations. [40 CFR 280]. The guidance uses tables, flowcharts, and checklists to provide a ``roadmap`` for DOE staff who are responsible for supervising UST operations. This package is tailored to address the issues facing DOE facilities. DOE staff should use this guidance as: An overview of the regulations for UST installation and operation; a comprehensive step-by-step guidance for the process of owning and operating an UST, from installation to closure; and a quick, ready-reference guide for any specific topic concerning UST ownership or operation.

Not Available

1992-06-01T23:59:59.000Z

387

Lead Poisoning of Seabirds:? Environmental Risks from Leaded Paint at a Decommissioned Military Base  

Science Journals Connector (OSTI)

Here we utilized lead isotopic fingerprinting to investigate sources of elevated lead exposure to Laysan albatross (Phoebastria immutabilis) chicks in the Midway Island National Wildlife Refuge, which was established on the site of a decom missioned military base that previously had undergone lead remediation. ... Midway has had multiple uses over the past century and was the center of a major battle during World War II. ...

Myra E. Finkelstein; Roberto H. Gwiazda; Donald R. Smith

2003-06-21T23:59:59.000Z

388

tHe LeAdING MBA IN JAPAN Japan's Leading  

E-Print Network [OSTI]

tHe LeAdING MBA IN JAPAN MBA Japan #12;Japan's Leading Master of Business adMinistration prograM the mcgill mBa JaPan Program, oFFered By mcgill University's desaUtels FacUlty oF management, is the leading mBa Program in JaPan. the two-weekends-Per-month Format allows stUdents to comPlete a FUll, to

Shoubridge, Eric

389

Reduced regulator dependence of neutron-matter predictions with perturbative chiral interactions  

Science Journals Connector (OSTI)

We calculate the energy per particle in infinite neutron matter perturbatively using chiral N3LO (next-to-next-to-next-to-leading order) two-body potentials plus N2LO three-body forces. The cutoff dependence of the predictions is investigated by employing chiral interactions with different regulators. We find that the inclusion of three-nucleon forces, which are consistent with the applied two-nucleon interaction, leads to a strongly reduced regulator dependence of the results.

L. Coraggio; J. W. Holt; N. Itaco; R. Machleidt; F. Sammarruca

2013-01-17T23:59:59.000Z

390

Archaeological Lead Findings in the Ukraine  

Science Journals Connector (OSTI)

In June?August 2006 an expedition with the aim to look for low?radioactive archaeological lead at the bottom of the Black Sea near the Crimean peninsula (Ukraine) was organised by a Korean?Ukrainian collaboration. The first samples with ?0.2 tons of total mass were found at a depth of 28 m among the relics of an ancient Greek ship. Their age has been dated to the first century B.C. This lead was used as ballast in the keel of the ship. The element composition of the samples was measured by means of X?ray fluorescence and ICP?MS analyses. The first preliminary limits on the 210 Pb contamination of the samples are less than a few hundreds mBq/kg. The measurements were performed using gamma spectroscopy with HPGe?detectors and alpha spectroscopy with commercial ??detectors. Measurements of 40K Th/U in the lead samples were undertaken in Kiev and in the underground laboratories of the Laboratori Nazionali del Gran Sasso (LNGS Italy). If it was found to be radio?clean this lead could be used as high efficiency shield for ultra low?level detectors and as raw material for growing radio?pure scintillation crystals such as PbMoO4 or PbWO4 for the search for rare processes.

F. A. Danevich; S. K. Kim; H. J. Kim; A. B. Kostezh; V. V. Kobychev; B. N. Kropivyansky; M. Laubenstein; V. M. Mokina; S. S. Nagorny; A. S. Nikolaiko; S. Nisi; D. V. Poda; V. I. Tretyak; S. A. Voronov

2007-01-01T23:59:59.000Z

391

Inadvertent Climate Modification Due to Anthropogenic Lead  

SciTech Connect (OSTI)

The relationship between atmospheric particulate matter and the formation of clouds is among the most uncertain aspects of our current understanding of climate change1. One specific question that remains unanswered is how anthropogenic particulate emissions are affecting the nucleation of ice crystals. Satellites show ice clouds cover more than a third of the globe2 and models suggest that ice nucleation initiates the majority of terrestrial precipitation3. It is therefore not possible to adequately understand either climate change or the global water cycle without understanding ice nucleation. Here we show that lead-containing particles are among the most efficient ice nucleating substances commonly found in the atmosphere. Field observations were conducted with mass spectrometry and electron microscopy at two remote stations on different continents, far removed from local emissions. Laboratory studies within two cloud chambers using controlled experimental conditions support the field data. Because the dominate sources of particulate lead are anthropogenic emissions such as aviation fuel, power generation, smelting, and the re-suspension of residue from tetra-ethyl leaded gasoline4, it is likely that cloud formation and precipitation have been affected when compared to pre-industrial times. A global climate model comparing pre-industrial and anthropogenically perturbed conditions shows that lead-containing particles may be increasing the outgoing longwave radiation by 0.2 to 0.8 W m-2, thereby offsetting a portion of the warming attributed to greenhouse gases1.

Cziczo, Daniel J.; Stetzer, Olaf; Worringen, Annette; Ebert, Martin; Weinbruch, Stephan; Kamphus, M.; Gallavardin, S. J.; Curtius, J.; Borrmann, S.; Froyd, Karl D.; Mertes, S.; Mohler, Ottmar; Lohmann, U.

2009-05-01T23:59:59.000Z

392

Quality Support G. Q. Kirk, Lead (4)  

E-Print Network [OSTI]

Quality Support G. Q. Kirk, Lead (4) R. L. Bullock (4) A. C. Hendricks (4) G. H. Henkel (4) D. L) Quality Systems and Services Division February 11, 2011 Operations Analysis E. L. Griffis L. R. Brown. Kendrick M. O. Williams Maintenance Engineering L. W. Burkle III G. L. Christensen R. A. Evans R. E. Galyon

393

The Commonwealth's Leading College of Engineering  

E-Print Network [OSTI]

into an unsafe urban environment to collect data. Virginia Tech's College Of Engineering #12;College and responsibility lies before the College to advance engineering curricula that will educate the engineerThe Commonwealth's Leading College of Engineering is at Virginia Tech Faculty Expertise Guide 2010

Beex, A. A. "Louis"

394

Lead toxicity, vulnerable subpopulations and emergency preparedness  

Science Journals Connector (OSTI)

......cerebrovascular morbidity and mortality-health endpoints for which the elderly...over the past 30 y, potential health risks from environmental Pb...mortality study. Environ. Health Perspect (2006) 114:1538-1541...cadmium, cobalt and lead as more dangerous than hitherto expected. Carcinogenesis......

Norm Healey

2009-06-01T23:59:59.000Z

395

Felix Wrsten ETH Zurich enjoys a leading  

E-Print Network [OSTI]

Felix Würsten ETH Zurich enjoys a leading position in the quantum sciences. The Executive Board now research in this area. "ETH Zurich has secured it- self a good starting position and now wishes to use physics will become the tool of the engineer." Fundamental development Together with the ETH Zurich Foun

Leonardo, Degiorgi

396

Observing Nucleon Decay in Lead Perchlorate  

E-Print Network [OSTI]

Lead perchlorate, part of the OMNIS supernova neutrino detector, contains two nuclei, 208Pb and 35Cl, that might be used to study nucleon decay. Both would produce signatures that will make them especially useful for studying less-well-studied neutron decay modes, e.g., those in which only neutrinos are emitted.

R. N. Boyd; T. Rauscher; S. D. Reitzner; P. Vogel

2003-07-22T23:59:59.000Z

397

The analysis and specification of large high-pressure, high-temperature valves for combustion turbine protection in second-generation PFB power plants: Topical report  

SciTech Connect (OSTI)

The purpose of this study was to provide a specification for the high-pressure/high-temperature valves for turbine overspeed protection in a commercial-scale second-generation pressurized fluidized bed combustion (PFBC) power plant. In the event of a loss of external (generator) load, the gas turbine rapidly accelerates from its normal operating speed. Protection from excessive overspeed can be maintained by actuation of fuel isolation and air bypass valves. A design specification for these valves was developed by analyses of the turbine/compressor interaction during a loss of load and analyses of pressure and flow transients during operation of the overspeed protection valves. The basis for these analyses was the Phase 1 plant conceptual design prepared in 1987.

Not Available

1994-08-01T23:59:59.000Z

398

Design of Optimal Regulators  

E-Print Network [OSTI]

Current research suggests the use of a liner quadratic performance index for optimal control of regulators in various applications. Some examples include correcting the trajectory of rocket and air vehicles, vibration suppression of flexible structures, and airplane stability. In all these cases, the focus is in suppressing/decreasing system deviations rapidly. However, if one compares the Linear Quadratic Regulator (LQR) solution with optimal solutions (minimum time), it is seen that the LQR solution is less than optimal in some cases indeed (3-6) times that obtained using a minimum time solution. Moreover, the LQR solution is sometimes unacceptable in practice due to the fact that values of control extend beyond admissible limits and thus the designer must choose coefficients in the linear quadratic form, which are unknown. The authors suggest methods which allow finding a quasi-optimal LQR solution with bounded control which is closed to the minimum time solution. They also remand the process of the minimum time decision. Keywords: Optimal regulator, minimum time controller, Linear Quadratic Regulator (LQR). -- This paper is declared a work of the U.S. Government and not subject to copyright protection in the USA. The manuscript is accepted as paper AIAA-2003-6638 by 2nd AIAA Unmanned Unlimited Systems, Technologies, and Operations-Aerospace, Land, and See Conference and Workshop - Exhibit, San Diego, California, USA, 15-18 Sep. 2003.

Alexander Bolonkin; Robert Sierakowski

2007-01-19T23:59:59.000Z

399

Emotion Regulation CONCEPTUAL FOUNDATIONS  

E-Print Network [OSTI]

in emotion and emotion regulation. 3 This is a chapter excerpt from Guilford Publications. Handbook, Hofer, & Vaughan, this volume; Shaver & Mikulincer, this volume), and even in physical illness (Sapolsky with a gossipy clerk counts. So does amusement at a cartoon, anger at economic disparities around the world

Gross, James J.

400

CBER-DETR Nevada Coincident and Leading Employment Leading Index Hits Bump in the Road  

E-Print Network [OSTI]

the seasonally adjusted data reported by the Bureau of Labor Statistics. The Nevada Coincident Employment IndexCBER-DETR Nevada Coincident and Leading Employment Indexes1 Leading Index Hits Bump in the Road The Nevada Coincident Employment Index measures the ups and downs of the Nevada economy using an index

Ahmad, Sajjad

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


401

CBER-DETR Nevada Coincident and Leading Employment Coincident Index Rises, Leading Index Pauses  

E-Print Network [OSTI]

the seasonally adjusted data reported by the Bureau of Labor Statistics. The Nevada Coincident Employment IndexCBER-DETR Nevada Coincident and Leading Employment Indexes1 Coincident Index Rises, Leading Index Pauses The Nevada Coincident Employment Index measures the ups and downs of the Nevada economy using

Ahmad, Sajjad

402

Temperature dependent nucleation, propagation, and annihilation of domain walls in all-perpendicular spin-valve nanopillars  

SciTech Connect (OSTI)

We present a study of the temperature dependence of the switching fields in Co/Ni-based perpendicularly magnetized spin-valves. While magnetization reversal of all-perpendicular Co/Ni spin valves at ambient temperatures is typically marked by a single sharp step change in resistance, low temperature measurements can reveal a series of resistance steps, consistent with non-uniform magnetization configurations. We propose a model that consists of domain nucleation, propagation, and annihilation to explain the temperature dependence of the switching fields. Interestingly, low temperature (<30?K) step changes in resistance that we associate with domain nucleation have a bimodal switching field and resistance step distribution, attributable to two competing nucleation pathways.

Gopman, D. B., E-mail: daniel.gopman@physics.nyu.edu; Kent, A. D. [Department of Physics, New York University, New York, New York 10003 (United States); Bedau, D. [Department of Physics, New York University, New York, New York 10003 (United States); HGST San Jose Research Center, San Jose, California 95135 (United States); Mangin, S. [Institut Jean Lamour, UMR CNRS 7198 Université de Lorraine, Nancy, France 54506 (France); Fullerton, E. E. [CMRR, University of California at San Diego, La Jolla, California 92093 (United States); Katine, J. A. [HGST San Jose Research Center, San Jose, California 95135 (United States)

2014-03-21T23:59:59.000Z

403

ESTIMATED SIL LEVELS AND RISK COMPARISONS FOR RELIEF VALVES AS A FUNCTION OF TIME-IN-SERVICE  

SciTech Connect (OSTI)

Risk-based inspection methods enable estimation of the probability of spring-operated relief valves failing on demand at the United States Department of Energy's Savannah River Site (SRS) in Aiken, South Carolina. The paper illustrates an approach based on application of the Frechet and Weibull distributions to SRS and Center for Chemical Process Safety (CCPS) Process Equipment Reliability Database (PERD) proof test results. The methodology enables the estimation of ANSI/ISA-84.00.01 Safety Integrity Levels (SILs) as well as the potential change in SIL level due to modification of the maintenance schedule. Current SRS practices are reviewed and recommendations are made for extending inspection intervals. The paper compares risk-based inspection with specific SILs as maintenance intervals are adjusted. Groups of valves are identified in which maintenance times can be extended as well as different groups in which an increased safety margin may be needed.

Harris, S.

2012-03-26T23:59:59.000Z

404

Relevance of valve overlap for meeting Euro 5 soot emissions requirements during load transient process in heavy duty diesel engines  

Science Journals Connector (OSTI)

This work describes the influence on performance and soot emissions of using different valve overlap camshafts during load transient processes in a heavy duty (HD) diesel engine equipped with a variable geometry turbine (VGT) in its turbocharger and a selective catalyst reactor (SCR) in the exhaust line. Based on the results of experiments and calculations, in this paper a description is given of how the valve timing affects the instantaneous exhaust and intake pressure, the short-circuit of the air mass flow, the prejudicial backflows, the performance of the turbine and hence the general performance and pollutant emissions of a VGT equipped HD diesel engine during a transient process. The paper concludes that very low or no overlap is imperative if a VGT is used to meet forthcoming pollutant emissions restrictions and to improve the transient response of HD turbocharged diesel engines.

J. Galindo; J.R. Serrano; F. Vera; C. Cervello; M. Lejeune

2006-01-01T23:59:59.000Z

405

Lead contamination in soil and groundwater in and around a lead processing industry: a case study  

Science Journals Connector (OSTI)

Environmental pollution is of major concern across the world, which is affected by a variety of contaminants. Lead is one of the major heavy metals used in industrial activity. Unscientific handling and disposal of lead bearing residues or lead waste has led to contamination of the surrounding soil and water environment. A detailed investigation of soil and groundwater was carried out in and around a selected lead processing industry located in a designated industrial area in Bangalore, India. The results of the investigations carried out indicated that there is no groundwater contamination, but lead concentration in top soil is found to exceed the prescribed standard limits at many places within the industrial premises. Considering the site condition and extent of contamination ex-situ remediation can be considered as the feasible remedial option.

A. Ramesh; P.V. Sivapullaiah; H. Lakshmi Kantha; B.S. Nangendra Prakesh

2013-01-01T23:59:59.000Z

406

Gasoline-like Fuel Effects on High-load, Boosted HCCI Combustion Employing Negative Valve Overlap Strategy  

SciTech Connect (OSTI)

In recent years a number of studies have demonstrated that boosted operation combined with external EGR is a path forward for expanding the high load limit of homogeneous charge compression ignition (HCCI) operation with the negative valve overlap (NVO) valve strategy. However, the effects of fuel composition with this strategy have not been fully explored. In this study boosted HCCI combustion is investigated in a single-cylinder research engine equipped with direct injection (DI) fueling, cooled external exhaust gas recirculation (EGR), laboratory pressurized intake air, and a fully-variable hydraulic valve actuation (HVA) valve train. Three fuels with significant compositional differences are investigated: regular grade gasoline (RON = 90.2), 30% ethanol-gasoline blend (E30, RON = 100.3), and 24% iso-butanol-gasoline blend (IB24, RON = 96.6). Results include engine loads from 350 to 800 kPa IMEPg for all fuels at three engine speeds 1600, 2000, and 2500 rpm. All operating conditions achieved thermal efficiency (gross indicated efficiency) between 38 and 47%, low NOX emissions ( 0.1 g/kWh), and high combustion efficiency ( 96.5%). Detailed sweeps of intake manifold pressure (atmospheric to 250 kPaa), EGR (0 25% EGR), and injection timing are conducted to identify fuel-specific effects. The major finding of this study is that while significant fuel compositional differences exist, in boosted HCCI operation only minor changes in operational conditions are required to achieve comparable operation for all fuels. In boosted HCCI operation all fuels were able to achieve matched load-speed operation, whereas in conventional SI operation the fuel-specific knock differences resulted in significant differences in the operable load-speed space. Although all fuels were operable in boosted HCCI, the respective air handling requirements are also discussed, including an analysis of the demanded turbocharger efficiency.

Kalaskar, Vickey B [ORNL] [ORNL; Szybist, James P [ORNL] [ORNL; Splitter, Derek A [ORNL] [ORNL

2014-01-01T23:59:59.000Z

407

Advanced Research: Innovation Leading to Successes  

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

Research: Innovation Leading to Research: Innovation Leading to Successes Exploring the "Grand Challenges" of Fossil Fuels December 2010 3 Exploring the "Grand Challenges" of Fossil Fuels NETL Advanced Research The Advanced Research (AR) Program within the Office of Coal and Power Systems of the National Energy Technology Laboratory (NETL), the research arm of the U.S. Department of Energy's Office of Fossil Energy (DOE/FE), fosters the development of innovative, cost-effective technologies for improving the efficiency, reliability, and environmental performance of advanced coal and power systems. In addition, AR bridges the gap between fundamental research into technology alternatives and applied research aimed at scale-up, deployment, and commercialization of the most promising technologies identified.

408

Nick Wright Named Advanced Technologies Group Lead  

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

Nick Wright Named Nick Wright Named Advanced Technologies Group Lead Nick Wright Named Advanced Technologies Group Lead February 4, 2013 Nick Nick Wright has been named head of the National Energy Research Scientific Computing Center's (NERSC) Advanced Technologies Group (ATG), which focuses on understanding the requirements of current and emerging applications to make choices in hardware design and programming models that best serve the science needs of NERSC users. ATG specializes in benchmarking, system performance, debugging and analysis, workload monitoring, use of application modeling tools, and future algorithm scaling and technology assessment. The team also engages with vendors and the general research community to advocate technological features that will enhance the effectiveness of systems for NERSC scientists.

409

Lead magnesium niobate actuator for micropositioning  

DOE Patents [OSTI]

An improved lead magnesium niobate actuator is disclosed comprising a cylindrical lead magnesium niobate crystal stack mounted in a cylindrical casing wherein a bias means, such as one or more belleville washers, is located between one end of the crystal stack and a partially closed end of the casing; and adjustment means are provided which bear against the opposite end of the crystal stack, whereby an adjustable compressive force is constantly applied against the crystal stack, whether the crystal stack is actuated in an extended position, or is in an unactuated contracted position. In a preferred embodiment, cooling ports are provided for the circulation of coolant in the actuator to cool the crystal stack, and provision is made for removal and replacement of the crystal stack without disconnecting the actuator from the external device being actuated.

Swift, Charles D. (Livermore, CA); Bergum, John W. (Concord, CA)

1994-01-01T23:59:59.000Z

410

Lead magnesium niobate actuator for micropositioning  

DOE Patents [OSTI]

An improved lead magnesium niobate actuator is disclosed comprising a cylindrical lead magnesium niobate crystal stack mounted in a cylindrical casing wherein a bias means, such as one or more belleville washers, is located between one end of the crystal stack and a partially closed end of the casing; and adjustment means are provided which bear against the opposite end of the crystal stack, whereby an adjustable compressive force is constantly applied against the crystal stack, whether the crystal stack is actuated in an extended position, or is in an unactuated contracted position. In a preferred embodiment, cooling ports are provided for the circulation of coolant in the actuator to cool the crystal stack, and provision is made for removal and replacement of the crystal stack without disconnecting the actuator from the external device being actuated. 3 figs.

Swift, C.D.; Bergum, J.W.

1994-10-25T23:59:59.000Z

411

Thomas-Fermi model: The leading correction  

Science Journals Connector (OSTI)

The correct treatment of strongly bound electrons is grafted smoothly onto the Thomas-Fermi computation of the total binding energy of neutral atoms. This provides a clearcut demonstration of the leading correction of relative order Z-13 which, with effects of relative order Z-23, gives an accurate account of the binding energy over a wide range of Z values. There is a brief discussion of relativistic corrections, with results that are somewhat at variance with previous numerical estimates.

Julian Schwinger

1980-11-01T23:59:59.000Z

412

L I NATIONAL' LEAD COMPANY OF OHIO  

Office of Legacy Management (LM)

L L I NATIONAL' LEAD COMPANY OF OHIO tJw HEALTH AND SAFETY DI"ISION - ANALITICIL DEPT. ANALYTICAL DATA SHEET _I . . NATIONAL LEAD COMPANY O F OHIO HEALTH AND SAFETY DIY1SION - ANALYTICAL DEPT. ANALYTICAL DATA SHEET NATIONA-i LEn' D COMPANY OF OHIO HEALTH AND SAFETY Dl"lSlDN - m4ALITICAL DEPT. ANALYTICAL DATA SHEET NO. I DlSTRlBUTlON OF COPIES I I A,w,lytlc.al Loboratorr (RBCORD COPI) 2 Induswlol Hvalen. B Rodhtlon Dept. 3 1 Water Trsotmmt Plant c=.z w&w hnp,., Only, - . _. NATIONAL LEAD COMPANY OF OHIO HEALiH ANO SAFETY OIVISIOH - w4ALYTICAL DEPT. ANALYTICAL DATA SHEET INDUSTRIAL, HYGlENE AND RADIATION DEPT. 1 ANALYTICAL CHEMISTRY SECTION i. H. NO. IHPLEN0S.i . 7 RO"Te TO, D.TB RECEIVED, B", 464 9 - sD6:LzTEo, lB"' S/24/61 I DP

413

Emotion Regulation JAMES J. GROSS  

E-Print Network [OSTI]

CHAPTER 31 ·Emotion Regulation JAMES J. GROSS Have you ever gotten so angry that you've done), and self-regulation (Mischel, Shoda, & Rodriguez, 1989). What is new are the theoretical and empiri cal

Gross, James J.

414

California State Regulations  

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

California California State Regulations: California State of California The California Department of Conservation's Division of Oil, Gas, and Geothermal Resources oversees the drilling, operation, maintenance, and plugging and abandonment of oil, natural gas, and geothermal wells. The regulatory program emphasizes the development of oil, natural gas, and geothermal resources in the state through sound engineering practices that protect the environment, prevent pollution, and ensure public safety. Other agencies that may be involved in the regulation of drilling wastes include the State Water Resources Control Board and appropriate Regional Water Quality Control Boards, the California Integrated Waste Management Board, the California Air Resources Board and appropriate Air Quality Management Districts or Air Pollution Control Districts, and the Department of Toxic Substances Control.

415

North Dakota State Regulations  

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

North Dakota North Dakota State Regulations: North Dakota State of North Dakota The North Dakota Industrial Commission (NDIC), through its Oil and Gas Division (OGD), is the regulatory agency for oil and gas exploration and production activities in North Dakota. The North Dakota Department of Health (NDDH) Environmental Health Section (EHS) has the responsibility to safeguard the quality of North Dakota's air, land, and water resources. Contact North Dakota Industrial Commission Oil and Gas Division 600 East Boulevard Avenue, Dept. 405 Bismarck, ND 58505-0840 (701) 328-8020 (phone) (701) 328-8022 (fax) North Dakota Department of Health Environmental Health Section 1200 Missouri Avenue P.O. Box 5520 Bismarck, ND 58506-5520 (701) 328-5150 (phone) (701) 328-5200 (fax) Disposal Practices and Applicable Regulations

416

Nevada State Regulations  

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

Nevada Nevada State Regulations: Nevada State of Nevada The Nevada Division of Minerals (Nevada Commission of Mineral Resources) administers programs and activities to further the responsible development and production of Nevada's mineral resources, including the regulation of oil- and gas-well drilling operations. Otherwise, the Nevada Division of Environmental Protection (Nevada Department of Conservation and Mineral Resources) administers the major environmental protection laws. Contact Nevada Division of Minerals (Carson City Office) 400 West King Street, Suite 106 Carson City, NV 89703 (775) 684-7040 (phone) (775) 684-7052 (fax) (Las Vegas Office) 2030 East Flamingo Road, Suite 220 Las Vegas, NV 89119 (702) 486-4343 (phone) (702) 486-4345 (fax) Nevada Division of Environmental Protection

417

Colorado State Regulations  

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

Colorado Colorado State Regulations: Colorado State of Colorado The Colorado Oil and Gas Conservation Commission (COGCC), a division of the Department of Natural Resources (DNR), regulates oil and gas activities in Colorado. The COGCC has broad statutory authority with respect to impacts on any air, water, soil, or biological resources resulting from oil and gas operations. The COGCC implements the state ground water standards and classifications as they relate to oil and gas exploration and production (E&P) activities. The COGCC has jurisdiction for all Class II injection wells except those on Indian lands. The COGCC has jurisdiction for the management of all E&P wastes except at commercial disposal facilities. The Colorado Department of Public Health and Environment (CDPHE) administers the environmental protection laws related to air quality, waste discharge to surface water, and commercial disposal facilities.

418

Kansas State Regulations  

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

Kansas Kansas State Regulations: Kansas State of Kansas The Kansas Corporation Commission (KCC) Conservation Division regulates oil and gas operations and protects correlative rights and environmental resources. Otherwise, the Kansas Department of Health and Environment (KDHE) administers the major environmental protection laws. Contact Kansas Corporation Commission (Main Office) 1500 S.W. Arrowhead Road Topeka, KS 66604-2425 (785) 271-3100 (phone) (785) 271-3354 (fax) Conservation Division Finney State Office Building 130 South Market, Room 2078 Wichita, KS 67202-3802 (316) 337-6200 (phone) (316) 337-6211 (fax) Kansas Department of Health and Environment Charles Curtis State Office Building 1000 S.W. Jackson Topeka, KS 66612 (785) 296-1500 (phone) (785) 368-6368 (fax)

419

Oklahoma State Regulations  

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

Oklahoma Oklahoma State Regulations: Oklahoma State of Oklahoma The Oklahoma Corporation Commission (OCC), through the Oil and Gas Division, assists the domestic oil and gas industry, protects and preserves the environment, and conserves the natural resources. General environmental protection regulations are administered by the Oklahoma Department of Environmental Quality (DEQ). Contact Oklahoma Corporation Commission Oil and Gas Division P.O. Box 52000 Oklahoma City, OK 73152-2000 (mailing address) (405) 521-2302 (phone) 2101 North Lincoln Blvd. Oklahoma City, OK 73105 (street address) Oklahoma Department of Environmental Quality P.O. Box 1677 Oklahoma City, OK 73101-1677 (mailing address) 707 North Robinson Oklahoma City, OK 73102 (street address) (405) 702-1000 (phone)

420

Regulation of Meiotic Recombination  

SciTech Connect (OSTI)

Meiotic recombination results in the heritable rearrangement of DNA, primarily through reciprocal exchange between homologous chromosome or gene conversion. In plants these events are critical for ensuring proper chromosome segregation, facilitating DNA repair and providing a basis for genetic diversity. Understanding this fundamental biological mechanism will directly facilitate trait mapping, conventional plant breeding, and development of genetic engineering techniques that will help support the responsible production and conversion of renewable resources for fuels, chemicals, and the conservation of energy (1-3). Substantial progress has been made in understanding the basal recombination machinery, much of which is conserved in organisms as diverse as yeast, plants and mammals (4, 5). Significantly less is known about the factors that regulate how often and where that basal machinery acts on higher eukaryotic chromosomes. One important mechanism for regulating the frequency and distribution of meiotic recombination is crossover interference - or the ability of one recombination event to influence nearby events. The MUS81 gene is thought to play an important role in regulating the influence of interference on crossing over. The immediate goals of this project are to use reverse genetics to identify mutants in two putative MUS81 homologs in the model plant Arabidopsis thaliana, characterize those mutants and initiate a novel forward genetic screen for additional regulators of meiotic recombination. The long-term goal of the project is to understand how meiotic recombination is regulated in higher eukaryotes with an emphasis on the molecular basis of crossover interference. The ability to monitor recombination in all four meiotic products (tetrad analysis) has been a powerful tool in the arsenal of yeast geneticists. Previously, the qrt mutant of Arabidopsis, which causes the four pollen products of male meiosis to remain attached, was developed as a facile system for assaying recombination using tetrad analysis in a higher eukaryotic system (6). This system enabled the measurement of the frequency and distribution of recombination events at a genome wide level in wild type Arabidopsis (7), construction of genetic linkage maps which include positions for each centromere (8), and modeling of the strength and pattern of interference (9). This proposal extends the use of tetrad analysis in Arabidopsis by using it as the basis for assessing the phenotypes of mutants in genes important for recombination and the regulation of crossover interference and performing a novel genetic screen. In addition to broadening our knowledge of a classic genetic problem - the regulation of recombination by crossover interference - this proposal also provides broader impact by: generating pedagogical tools for use in hands-on classroom experience with genetics, building interdisciplinary collegial partnerships, and creating a platform for participation by junior scientists from underrepresented groups. There are three specific aims: (1) Isolate mutants in Arabidopsis MUS81 homologs using T-DNA and TILLING (2) Characterize recombination levels and interference in mus81 mutants (3) Execute a novel genetic screen, based on tetrad analysis, for genes that regulate meiotic recombination

Gregory p. Copenhaver

2011-11-09T23:59:59.000Z

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


421

Computing Borel's Regulator II.  

E-Print Network [OSTI]

In our earlier article we described a power series formula for the Borel regulator evaluated on the odd-dimensional homology of the general linear group of a number field and, concentrating on dimension three for simplicity, described a computer algorithm which calculates the value to any chosen degree of accuracy. In this sequel we give an algorithm for the construction of the input homology classes and describe the results of one cyclotomic field computation.

Zacky Choo; Wajid Mannan; Rubén J. Sánchez-García; Victor P. Snaith

422

Energy saving dispatch with complex constraints: Prohibited zones, valve point effect and carbon tax  

Science Journals Connector (OSTI)

Abstract This paper presents an energy saving dispatch (ESD) strategy, based upon the optimal power flow (OPF) model, considering complex constraints, such as prohibited operating zones, the valve point effect of generation units and the carbon tax of a power grid. With these constraints, the OPF problem becomes more difficult to resolve, and it needs to be dealt with by a more accurate and reliable optimization algorithm. In this paper, an improved group search optimizer (GSO), namely the group search optimizer with intraspecific competition and lévy walk (GSOICLW), is adopted to tackle this problem. It is more biologically realistic than GSO, in which intraspecific competition (IC) and lévy walk (LW) are incorporated in the original GSO. IC and LW of GSOICLW are capable of achieving superior balance between global and local searching, i.e., GSOICLW maintains GSO’s global searching ability to avoid entrapping in local optima while improves local searching near the global optima. The standard IEEE 30-bus power system is employed to carry out the simulation study to test GSOICLW, which is subsequently compared with other evolutionary algorithms (EAs). Simulation results show that GSOICLW outperforms other \\{EAs\\} used in this research and also provides accurate and reliable optimization results in dealing with the OPF problem for ESD.

Y.Z. Li; M.S. Li; Q.H. Wu

2014-01-01T23:59:59.000Z

423

Performance characteristics of a turbo expander substituted for expansion valve on air-conditioner  

Science Journals Connector (OSTI)

An experimental study is conducted on a small turbo expander which could be applied to the expansion process in place of expansion valves in refrigerator or air-conditioner to improve the cycle efficiency by recovering energy from the throttling process. The operating gas is \\{HFC134a\\} and the maximum cooling capacity of experiment apparatus is 32.7 kW. Four different turbo expanders are tested to find the performance characteristics of the turbo expander when they operate at a low partial admission rate. The partial admission rate is 1.70% or 2.37, and expanders are operated in the supersonic flow. In the experiment, pressure and temperature are measured at 10 different locations in the experimental apparatus. In addition to these measurements, output power at the turbo expander is measured through a generator installed on a rotor shaft with the rotational speed. Performance data of the turbo expander are obtained at many part load operations by adjusting the output power of the generator. A maximum of 15.8% total-to-static efficiency is obtained when the pressure ratio and the partial admission ratio are 2.37 and 1.70%, respectively. Experimental results show that the optimal velocity ratio decreases when the pressure ratio is decreased, and peak efficiencies, which are obtained at locally maximized efficiency depending on the operating condition, vary linearly against the subcooling temperature or the pressure ratio.

Soo-Yong Cho; Chong-Hyun Cho; Chaesil Kim

2008-01-01T23:59:59.000Z

424

Performance characteristics of a turbo expander substituted for expansion valve on air-conditioner  

SciTech Connect (OSTI)

An experimental study is conducted on a small turbo expander which could be applied to the expansion process in place of expansion valves in refrigerator or air-conditioner to improve the cycle efficiency by recovering energy from the throttling process. The operating gas is HFC134a and the maximum cooling capacity of experiment apparatus is 32.7 kW. Four different turbo expanders are tested to find the performance characteristics of the turbo expander when they operate at a low partial admission rate. The partial admission rate is 1.70% or 2.37, and expanders are operated in the supersonic flow. In the experiment, pressure and temperature are measured at 10 different locations in the experimental apparatus. In addition to these measurements, output power at the turbo expander is measured through a generator installed on a rotor shaft with the rotational speed. Performance data of the turbo expander are obtained at many part load operations by adjusting the output power of the generator. A maximum of 15.8% total-to-static efficiency is obtained when the pressure ratio and the partial admission ratio are 2.37 and 1.70%, respectively. Experimental results show that the optimal velocity ratio decreases when the pressure ratio is decreased, and peak efficiencies, which are obtained at locally maximized efficiency depending on the operating condition, vary linearly against the subcooling temperature or the pressure ratio. (author)

Cho, Soo-Yong [Department of Mechanical and Aerospace Engineering (ReCAPT), Gyeongsang National University, 900 Gajoa-dong, Jinju 660-701 (Korea); Cho, Chong-Hyun [School of Mechanical and Aerospace Engineering, Gyeongsang National University, 900 Gajoa-dong, Jinju 660-701 (Korea); Kim, Chaesil [Department of Mechanical Engineering, Changwon National University, 9 Sarim-dong, Changwon 641-773 (Korea)

2008-09-15T23:59:59.000Z

425

Temperature controlled high voltage regulator  

DOE Patents [OSTI]

A temperature controlled high voltage regulator for automatically adjusting the high voltage applied to a radiation detector is described. The regulator is a solid state device that is independent of the attached radiation detector, enabling the regulator to be used by various models of radiation detectors, such as gas flow proportional radiation detectors.

Chiaro, Jr., Peter J. (Clinton, TN); Schulze, Gerald K. (Knoxville, TN)

2004-04-20T23:59:59.000Z

426

Improving CS regulations.  

SciTech Connect (OSTI)

President Carter issued Executive Order 12044 (3/28/78) that required all Federal agencies to distinguish between significant and insignificant regulations, and to determine whether a regulation will result in major impacts. This study gathered information on the impact of the order and the guidelines on the Office of Conservation and Solar Energy (CS) regulatory practices, investigated problems encountered by the CS staff when implementing the order and guidelines, and recommended solutions to resolve these problems. Major tasks accomplished and discussed are: (1) legislation, Executive Orders, and DOE Memoranda concerning Federal administrative procedures relevant to the development and analysis of regulations within CS reviewed; (2) relevant DOE Orders and Memoranda analyzed and key DOE and CS staff interviewed in order to accurately describe the current CS regulatory process; (3) DOE staff from the Office of the General Counsel, the Office of Policy and Evaluation, the Office of the Environment, and the Office of the Secretary interviewed to explore issues and problems encountered with current CS regulatory practices; (4) the regulatory processes at five other Federal agencies reviewed in order to see how other agencies have approached the regulatory process, dealt with specific regulatory problems, and responded to the Executive Order; and (5) based on the results of the preceding four tasks, recommendations for potential solutions to the CS regulatory problems developed. (MCW)

Nesse, R.J.; Scheer, R.M.; Marasco, A.L.; Furey, R.

1980-10-01T23:59:59.000Z

427

Asian anthropogenic lead contamination in the North Pacific Ocean as evidenced by stable lead isotopic compositions  

E-Print Network [OSTI]

and North Central Pacific Ocean. Deep Sea Res. Part II Top.Lead Within the Northwest Pacific Ocean Evidenced by Leadventilation flux of the Pacific Ocean. J. Geophys. Res. 106(

Zurbrick, Cheryl Marie

2014-01-01T23:59:59.000Z

428

Anthropogenic lead dynamics in the terrestrial and marine environment  

Science Journals Connector (OSTI)

...shown in gure 7, re ect the introduction and phase-out of leaded petrol. Measuring lead concentrations in ice near Camp Century, Greenland, Murozumi et al. (1969) rst observed the Arctic anthropogenic transient, with lead concentrations increas...

2002-01-01T23:59:59.000Z

429

Lead-Free Solders: Focus on Fundamentals, Reliability, and Applications  

Science Journals Connector (OSTI)

Although lead-free solders have been adopted by much of the commercial electronics industry, the implementation of lead-free processes still faces some challenges. The performance of lead-free solder joints in hi...

Babak Arfaei

2014-10-01T23:59:59.000Z

430

Lead in Your Drinking Water Lead (Pb) is an extremely toxic heavy metal that unfortunately occurs widely in  

E-Print Network [OSTI]

Lead in Your Drinking Water Lead (Pb) is an extremely toxic heavy metal that unfortunately occurs of metallic lead in the soil (4) Drinking water ­ water as it leaves the treatment plant has no lead;Common metals used for the supply pipe are lead, copper and galvanized iron. Also in the system

Maynard, J. Barry

431

Electrochemical Sensors for the Detection of Lead and Other Toxic...  

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

Sensors for the Detection of Lead and Other Toxic Heavy Metals: The Next Generation of Personal Exposure Electrochemical Sensors for the Detection of Lead and Other Toxic Heavy...

432

Scheibe named lead scientist for EMSL computing | EMSL  

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

lead scientist for EMSL computing He will oversee Multiscale Modeling and High Performance Computing Tim Scheibe EMSL has selected Tim Scheibe as lead scientist for Multiscale...

433

Research Led by Sandia Reveals Leading-Edge Erosion Significantly...  

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

Research Led by Sandia Reveals Leading-Edge Erosion Significantly Reduces Wind Turbine Performance Research Led by Sandia Reveals Leading-Edge Erosion Significantly Reduces Wind...

434

Inspiration from world-class scientists leads Patricia Langan...  

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

leads student to nanoscience Inspiration from world-class scientists leads Patricia Langan to nanoscience Graduate research assistant discovered her passion while interning as...

435

Anthropogenic Lead Emissions in the Ocean: The Evolving Global Experiment  

E-Print Network [OSTI]

We review the current distribution of lead and lead isotopes in the ocean with regard to the evolving pattern of human emissions during the past decades and centuries.

Lee, Jong-Mi

436

AVTA: 2010 Honda Civic HEV with Experimental Ultra Lead Acid...  

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

2010 Honda Civic HEV with Experimental Ultra Lead Acid Battery Testing Results AVTA: 2010 Honda Civic HEV with Experimental Ultra Lead Acid Battery Testing Results The Vehicle...

437

Combined Heat and Power System Enables 100% Reliability at Leading...  

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

Enables 100% Reliability at Leading Medical Campus - Case Study, 2013 Combined Heat and Power System Enables 100% Reliability at Leading Medical Campus - Case Study, 2013 Thermal...

438

Hydrogen diffusion in Lead Zirconate Titanate and Barium Titanate...  

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

diffusion in Lead Zirconate Titanate and Barium Titanate. Hydrogen diffusion in Lead Zirconate Titanate and Barium Titanate. Abstract: Hydrogen is a potential clean-burning,...

439

Cambodia-Low Emissions Asian Development (LEAD) Program | Open...  

Open Energy Info (EERE)

in up to 11 partner countries: Bangladesh, Cambodia, India, Indonesia, Laos, Malaysia, Nepal, Papua New Guinea, Philippines, Thailand, and Vietnam. USAID LEAD Factsheet LEAD Fact...

440

University of Maryland Wins Architecture Prize, Pulls Into Lead...  

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

Maryland Wins Architecture Prize, Pulls Into Lead in 2011 Solar Decathlon University of Maryland Wins Architecture Prize, Pulls Into Lead in 2011 Solar Decathlon September 28, 2011...

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


441

Texas State Regulations  

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

Texas Texas State Regulations: Texas State of Texas The Railroad Commission of Texas (RCC), through the Oil and Gas Division, administers oil and gas exploration, development, and production operations, except for oil and gas leasing, royalty payments, surface damages through oil and gas operations, and operator-landowner contracts. The RCC and the Texas Commission on Environmental Quality (TCEQ), formerly, the Texas Natural Resource Conservation Commission (TNRCC), have entered into a Memorandum of Understanding clarifying jurisdiction over oil field wastes generated in connection with oil and gas exploration, development, and production. The RCC Oil and Gas Division operates nine district offices, each staffed with field enforcement and support personnel.

442

Designing a wastewater and storm water management system for a new sealed lead acid battery facility  

SciTech Connect (OSTI)

Design of a new lead acid battery manufacturing facility requires careful planning to ensure compliance with wastewater, storm water, air quality and hazardous waste regulations. A case history is presented describing the planning approach to development of a wastewater and storm water management system for an SLA (sealed lead acid) battery plant in Columbus, Georgia. Several pollution prevention concepts were utilized in the design of the wastewater management system, which resulted in an 80% reduction in wastewater volume, and at the same time ensured compliance with the mass-based federal categorical effluent limits. Storm water management features were focused on eliminating any outdoor areas of industrial activity by avoiding outdoor storage areas to the extent possible, containment of remaining areas, and stringent air emission control concepts. Federal effluent guidelines for the battery manufacturing point source category as well as federal regulations governing the industrial storm water discharge permitting program were the key factors in motivating the design concepts utilized. Areas affected by the design concepts included facility layout, HVAC system design, process recovery systems, chemical storage and containment, and wastewater treatment technology. The facility has been in compliance with all applicable environmental regulations since startup in August, 1992 and has been awarded the 1995 Matsushita Electric Corporation`s President`s Award for Environmental Excellence.

Nichols, C.P.; Langan, M.M.

1996-12-31T23:59:59.000Z

443

Lead Slowing Down Spectrometer Research Plans  

SciTech Connect (OSTI)

The MPACT-funded Lead Slowing Down Spectrometry (LSDS) project has been evaluating the feasibility of using LSDS techniques to assay fissile isotopes in used nuclear fuel assemblies. The approach has the potential to provide considerable improvement in the assay of fissile isotopic masses in fuel assemblies compared to other non-destructive techniques in a direct and independent manner. The LSDS collaborations suggests that the next step to in empirically testing the feasibility is to conduct measurements on fresh fuel assemblies to understand investigate self-attenuation and fresh mixed-oxide (MOX) fuel rodlets so we may betterto understand extraction of masses for 235U and 239Pu. While progressing toward these goals, the collaboration also strongly suggests the continued development of enabling technology such as detector development and algorithm development, thatwhich could provide significant performance benefits.

Warren, Glen A.; Kulisek, Jonathan A.; Gavron, Victor; Danon, Yaron; Weltz, Adam; Harris, Jason; Stewart, T.

2013-03-22T23:59:59.000Z

444

Synthesis and regeneration of lead (IV) acetate  

SciTech Connect (OSTI)

Lead acetate [Pb(O{sub 2}CMe){sub 4}] was easily synthesized from a warm solution of Pb{sub 3}O{sub 4}, HO{sub 2}CMe and O(OCMe){sub 2} following literature preparations when the appropriate measures to minimize water contamination were followed. Furthermore, Pb(O{sub 2}CMe){sub 4} which has been decomposed (evidenced by the appearance of a purple color due to oxidation) can be regenerated using a similar preparatory route. Introduction of Pb(O{sub 2}CMe){sub 4} from the two routes outlined above into the IMO process for production of PZT thin films gave films with comparable ferroelectric properties to commercially available Pb(O{sub 2}CMe){sub 4} precursors. However, the freshly synthesized material yields PZT films with better properties compared to the recycled material.

Boyle, T.J.; Al-Shareef, H.N.; Moore, G.J. [Sandia National Labs., Albuquerque, NM (United States). Advanced Materials Lab.

1996-11-01T23:59:59.000Z

445

6 - Nuclear Waste Regulations  

Science Journals Connector (OSTI)

The most influential national and international bodies providing recommendations on radiation protection are described, including the International Commission on Radiological Protection (ICRP) and the International Atomic Energy Agency (IAEA). Protection philosophies and the ICRP general principles of radiation protection are discussed. Radioactive material regulations and sources of radiation are explained. Criteria of exemption from regulatory control are discussed with examples of exemption levels for naturally occurring and radioactive waste radionuclides. Clearance of both moderate and bulk amounts of materials from regulatory control is also explained, including examples of EU and the UK regulations. Dose limits recommended by the ICRP are given, as well as the main principles of control of radiation hazards. Nuclear waste classification schemes are outlined, including the IAEA classification scheme. A brief explanation of nuclear waste classes including exempt waste, very short-lived waste, very low-level waste, low-level waste, intermediate-level waste and high-level waste is given. Examples of waste classification schemes are given, including that of the UK.

M.I. Ojovan; W.E. Lee

2014-01-01T23:59:59.000Z

446

Comparison of leading and next-to-leading logarithmic electroweak corrections to Higgs production  

E-Print Network [OSTI]

Using soft-collinear effective theory, the leading-log radiative electroweak corrections are written in a closed and analytical form for the hadronic cross section of Higgs production through vector boson fusion, qq->qqH, one of the most promising channels for studying the Higgs boson at the LHC. The simple leading-log resummation is compared with a full next-to-leading-log calculation, and its accuracy is found to be of order 1% up to 10 TeV, i.e. better than the accuracy of PDFs. Corrections are found to be larger than predicted by one-loop fixed order approximations at LHC energies. The method provides a simple way of incorporating the electroweak corrections in software packages, improving the accuracy of simulations.

Fabio Siringo

2013-07-29T23:59:59.000Z

447

Comparison of leading and next-to-leading logarithmic electroweak corrections to Higgs production  

E-Print Network [OSTI]

Using soft-collinear effective theory, the leading-log radiative electroweak corrections are written in a closed and analytical form for the hadronic cross section of Higgs production through vector boson fusion, qq->qqH, one of the most promising channels for studying the Higgs boson at the LHC. The simple leading-log resummation is compared with a full next-to-leading-log calculation, and its accuracy is found to be of order 1% up to 10 TeV, i.e. comparable with the accuracy of PDFs. Corrections are found to be larger than predicted by one-loop fixed order approximations at LHC energies. The method provides a simple way of incorporating the electroweak corrections in software packages, improving the accuracy of simulations.

Siringo, Fabio

2013-01-01T23:59:59.000Z

448

Federal Environmental Regulations Impacting Hydrocarbon Exploration, Drilling, and Production Operations  

SciTech Connect (OSTI)

Waste handling and disposal from hydrocarbon exploration, drilling, and production are regulated by the US Environmental Protection Agency (EPA) through federal and state regulations and/or through implementation of federal regulations. Some wastes generated in these operations are exempt under the Resource Conservation and Recovery Act (RCRA) but are not exempt under the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA), Superfund Amendments and Reauthorization Act (SARA), and other federal environmental laws. Exempt wastes remain exempt only if they are not mixed with hazardous wastes or hazardous substances. Once mixture occurs, the waste must be disposed as a hazardous material in an approved hazardous waste disposal facility. Before the Clean Air Act as amended in 1990, air emissions from production, storage, steam generation, and compression facilities associated with hydrocarbon exploration, drilling, and production industry were not regulated. A critical proposed regulatory change which will significantly effect Class II injection wells for disposal of produced brine and injection for enhanced oil recovery is imminent. Federal regulations affecting hydrocarbon exploration, drilling and production, proposed EPA regulatory changes, and a recent significant US Court of Appeals decision are covered in this report. It appears that this industry will, in the future, fall under more stringent environmental regulations leading to increased costs for operators.

Carroll, Herbert B.; Johnson, William I.

1999-04-27T23:59:59.000Z

449

Lead Poisoning: A Preventable Childhood Disease of the Slums  

Science Journals Connector (OSTI)

...complications prevention & control Paint poisoning Socioeconomic Factors...han-dled better and more cheaply by robots. "If manned planetary exploration...the lead from chipping leaded paint in old buildings. Lead poisoning...objects, such as chips of leaded paint, even if they are not hungry-a...

Mark W. Oberle

1969-09-05T23:59:59.000Z

450

Elevated Sod2 Activity Augments Matrix Metalloproteinase Expression: Evidence for the Involvement of Endogenous Hydrogen Peroxide in Regulating Metastasis  

Science Journals Connector (OSTI)

...of Endogenous Hydrogen Peroxide in Regulating...reversed by the hydrogen peroxide-detoxifying...to elevated MMP production. INTRODUCTION...MATERIALS AND METHODS Cell Culture and...lead to increased hydrogen peroxide production (35) . Thus...

Kristin K. Nelson; Aparna C. Ranganathan; Jelriza Mansouri; Ana M. Rodriguez; Kirwin M. Providence; Joni L. Rutter; Kevin Pumiglia; James A. Bennett; and J. Andres Melendez

2003-01-01T23:59:59.000Z

451

New Automobile Regulations: Double the Fuel Economy, Half the CO2 Emissions, and Even Automakers Like It  

E-Print Network [OSTI]

Lead-Time: The Case of US Automobile Greenhouse Gas EmissionNew Automobile Regulations Double the Fuel Economy, Half thephysics of the modern automobile involve an uphill battle to

Lutsey, Nic

2012-01-01T23:59:59.000Z

452

Better Buildings Neighborhood Program: Honeymoons Lead to Upgrades in  

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

Honeymoons Honeymoons Lead to Upgrades in Western Vermont to someone by E-mail Share Better Buildings Neighborhood Program: Honeymoons Lead to Upgrades in Western Vermont on Facebook Tweet about Better Buildings Neighborhood Program: Honeymoons Lead to Upgrades in Western Vermont on Twitter Bookmark Better Buildings Neighborhood Program: Honeymoons Lead to Upgrades in Western Vermont on Google Bookmark Better Buildings Neighborhood Program: Honeymoons Lead to Upgrades in Western Vermont on Delicious Rank Better Buildings Neighborhood Program: Honeymoons Lead to Upgrades in Western Vermont on Digg Find More places to share Better Buildings Neighborhood Program: Honeymoons Lead to Upgrades in Western Vermont on AddThis.com... Better Buildings Residential Network Progress

453

Alternative Fuels Data Center: San Diego Leads in Promoting EVs  

Alternative Fuels and Advanced Vehicles Data Center [Office of Energy Efficiency and Renewable Energy (EERE)]

San Diego Leads in San Diego Leads in Promoting EVs to someone by E-mail Share Alternative Fuels Data Center: San Diego Leads in Promoting EVs on Facebook Tweet about Alternative Fuels Data Center: San Diego Leads in Promoting EVs on Twitter Bookmark Alternative Fuels Data Center: San Diego Leads in Promoting EVs on Google Bookmark Alternative Fuels Data Center: San Diego Leads in Promoting EVs on Delicious Rank Alternative Fuels Data Center: San Diego Leads in Promoting EVs on Digg Find More places to share Alternative Fuels Data Center: San Diego Leads in Promoting EVs on AddThis.com... Sept. 3, 2011 San Diego Leads in Promoting EVs W atch how San Diego is leading the way in promoting electric vehicles. For information about this project, contact San Diego Regional Clean Cities

454

Nebraska Air Quality Regulations (Nebraska)  

Broader source: Energy.gov [DOE]

These regulations, promulgated by the Department of Environmental Quality, contain provisions pertaining to ambient air quality standards, pollution source operating permits, emissions reporting,...

455

Underground Injection Control Regulations (Kansas)  

Broader source: Energy.gov [DOE]

This article prohibits injection of hazardous or radioactive wastes into or above an underground source of drinking water, establishes permit conditions and states regulations for design,...

456

Lead(ii) Detection An Exceptionally Selective Lead(ii)-Regulatory  

E-Print Network [OSTI]

-spore- forming bacillus that flourishes in millimolar concentrations of toxic heavy metals.[12] It is the only that responds to lead(ii) ions with a high selectivity over other heavy metal ions. This has not been achieved developed for the detection of other small molecules, but with limited success for heavy metal ions

He, Chuan

457

Lead Safety Awareness This Bulletin provides information on the safe handling of lead  

E-Print Network [OSTI]

per cubic meter of air (50 ug/m 3 ), averaged over an 8-hour work-day. For potentially higher exposure necessary, seal off the work area with 6-millimeter plastic and wear properly fitting High Efficiency Particulate Air (HEPA) respirator and protective clothing and equipment. · Post warning signs where lead

458

Lead Defendant Cases Filed Injunctions - Remands  

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

NEPA Cases Filed in 2011 2011 NEPA Case Dispositions NEPA Cases Filed in 2011 2011 NEPA Case Dispositions Lead Defendant Cases Filed Injunctions - Remands Judgment for defendant 79 ARMY-USACE 3 2 Dismissal w/o settlement 20 DHS-USCG 1 1 Settlement 18 DOD 0 0 Adverse dispositions: 29 DOE-Energy 2 0 TRO 0 DOE-FERC 0 0 Preliminary Injunction 5 DOE-NNSA 0 0 Permanent Injunction 3 DOI-BIA 0 0 Remand 21 DOI-BLM 22 8 DOI-BOEM 0 0 Basis for 2011 NEPA Dispositions DOI-BOR 1 2 Jurisdictional - P prevailed 2 DOI-FWS 4 2 Jurisdictional - D prevailed 20 DOI-NPS 4 0 NEPA - Not required 4 DOJ 0 0 NEPA - Is required 4 DOS 0 0 CE - Adequate 5 DOT-FMCSA 1 0 CE - Not Adequate 5 DOT-FAA 3 1 EA - Adequate* 24 DOT-FHWA 14 2 EA - Not Adequate* 5 DOT-FTA 2 0 EIS - Adequate* 32 DOT-STB 0 1 EIS - Not Adequate* 15

459

Lead removal by using carbon nanotubes  

Science Journals Connector (OSTI)

Exposure to lead (Pb) can cause anemia, diseases of the liver and kidneys, brain damage and ultimately death. For these reasons, heavy metals must be removed as much as possible from water. The removal of Pb (II) ions from aqueous solution using carbon nanotubes (CNT) as the adsorbent was investigated. The effects of pH were studied at 25°C. Batch mode adsorption study has revealed that the removal of Pb (II) ions was maximum (85% removal) at pH 5 and achieved 83% removal at 40 mg/L of CNTs. The adsorption continuously increased in the pH range of 3-5, beyond which the adsorption could not be carried out due to the precipitation of metal. This study was also supported by characterisation of CNTs using FESEM. The characterisation suggested that at acidic condition (pH 5), the surfaces of CNTs are more aligned and well-integrated compared to CNTs at different pHs. Finally, it can be concluded that CNTs could be a potential adsorbent for the removal of Pb from wastewater.

A.A. Muataz; M. Fettouhi; A. Al-Mammum; N. Yahya

2009-01-01T23:59:59.000Z

460

Nebraska State Regulations  

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

Nebraska Nebraska State Regulations: Nebraska State of Nebraska The Nebraska Oil and Gas Conservation Commission (NOGCC) seeks to prevent waste, protect correlative rights of all owners, and encourage and authorize secondary recovery, pressure maintenance, cycling, or recycling, in order that the greatest ultimate recovery of oil and gas may be obtained within the state while protecting the environment. Otherwise, the Nebraska Department of Environmental Quality (NDEQ) administers the major environmental protection laws. Contact Nebraska Oil and Gas Conservation Commission 922 Illinois Street, P.O. Box 399 Sidney, NE 69162 (308) 254-6919 (phone) (308) 254-6922 (fax) Nebraska Department of Environmental Quality 1200 "N" Street, Suite 400 P.O. Pox 98922 Lincoln, NE 68509

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


461

Kentucky State Regulations  

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

Kentucky Kentucky State Regulations: Kentucky State of Kentucky The Division of Oil and Gas (DOG) in the Department of Natural Resources (DNR) fosters conservation of all mineral resources, encourages exploration of such resources, protects the correlative rights of land and mineral owners, prohibits waste and unnecessary surface loss and damage, and encourages the maximum recovery of oil and gas from all deposits. The Energy and Environment Cabinet brings together various Kentucky agencies. It is tasked with protecting and enhancing Kentucky's natural resources. The Department for Environmental Protection (DEP) administers the major environmental protection laws. The U.S. Environmental Protection Agency (EPA) Region 4 administers Class II underground injection control (UIC) programs in Kentucky in direct implementation.

462

Computing Borel's Regulator.  

E-Print Network [OSTI]

We present an infinite series formula based on the Karoubi-Hamida integral, for the universal Borel class evaluated on H_{2n+1}(GL(\\mathbb{C})). For a cyclotomic field F we define a canonical set of elements in K_3(F) and present a novel approach (based on a free differential calculus) to constructing them. Indeed, we are able to explicitly construct their images in H_{3}(GL(\\mathbb{C})) under the Hurewicz map. Applying our formula to these images yields a value V_1(F), which coincides with the Borel regulator R_1(F) when our set is a basis of K_3(F) modulo torsion. For F= \\mathbb{Q}(e^{2\\pi i/3}) a computation of V_1(F) has been made based on our techniques.

Zacky Choo; Wajid Mannan; Rubén J. Sánchez-García; Victor P. Snaith

463

Reducing booster-pump-induced contaminant intrusion in Indian water systems with a self-actuated, back-pressure regulating valve  

E-Print Network [OSTI]

Intermittently-operated water systems struggle to equitably and effectively distribute clean water to customers. One common customer response to intermittency is to supplement the water system's pressure by using a household, ...

Taylor, David Donald James

2014-01-01T23:59:59.000Z

464

Intrinsically Disordered Proteins: Regulation and Disease Regulation of IDPs  

E-Print Network [OSTI]

31st Jan 2011 Intrinsically Disordered Proteins: Regulation and Disease Regulation of IDPs M. Madan ......................................................................................................................................8 #12;1 Abstract Intrinsically disordered proteins (IDPs) are often enriched in signaling and regulatory functions because the features of disordered segments permit interaction with multiple proteins

Babu, M. Madan

465

Macroencapsulation of lead and steel SWARF  

SciTech Connect (OSTI)

The treatability study to macroencapsulate radioactively contaminated lead and steel swarf (cuttings and/or chips)and chunks, a low level mixed waste, from the dismantlement of excess surplus uranium fuel handling and transfer casks was successful. Macroencapsulation is the land disposal restriction treatment standard for this waste form per 40 CFR 268.42 Table 3. An epoxy-based thermoset system was employed due to cracking failures of other types of thermoset systems. Bench scale tests were performed with a two-part epoxy (resin and hardener) using cast iron chips as a surrogate waste media. A two stage encapsulation process was employed in treating the swarf. Two liters of epoxy were added to a 2.8{ell} (3 qt) container of swarf under 51K Pa vacuum (-15-inch of Hg) during the first stage of the process. In this stage each individual particle or chip was wetted by epoxy and allowed to harden into an initial monolith. The second stage encapsulated the initial monolith with a secondary layer of epoxy forming a larger final monolith. By evacuating the air from the swarf and epoxy during the initial monolith encapsulation, a higher density (higher swarf to epoxy ratio) was achieved. Tensile and compressive strength tests were performed on samples and without any media (cast iron chips). The coupons were prepared from a series of monoliths featuring various mixtures ratios and vacuum levels. The tensile strength of epoxy without chips averaged 41M Pa (6000 psi) and 1.4M Pa (2000 psi) with cast iron chips. Compression strengths averaged 140M Pa (20,000 psi) without chips and 66.2M Pa (9600 psi) with cast iron chips.

Zirker, L.; Thiesen, T.; Tyson, D.; Beitel, G.

1995-12-01T23:59:59.000Z

466

Alternative Fuels Data Center: Alabama City Leads With Biodiesel and  

Alternative Fuels and Advanced Vehicles Data Center [Office of Energy Efficiency and Renewable Energy (EERE)]

Alabama City Leads Alabama City Leads With Biodiesel and Ethanol to someone by E-mail Share Alternative Fuels Data Center: Alabama City Leads With Biodiesel and Ethanol on Facebook Tweet about Alternative Fuels Data Center: Alabama City Leads With Biodiesel and Ethanol on Twitter Bookmark Alternative Fuels Data Center: Alabama City Leads With Biodiesel and Ethanol on Google Bookmark Alternative Fuels Data Center: Alabama City Leads With Biodiesel and Ethanol on Delicious Rank Alternative Fuels Data Center: Alabama City Leads With Biodiesel and Ethanol on Digg Find More places to share Alternative Fuels Data Center: Alabama City Leads With Biodiesel and Ethanol on AddThis.com... July 21, 2012 Alabama City Leads With Biodiesel and Ethanol L earn how the City of Hoover uses biodiesel and ethanol to fuel municipal

467

Invariant formulation for dispersed transverse isotropy in aortic heart valves: An efficient means for modeling fiber splay  

SciTech Connect (OSTI)

Most soft tissues possess an oriented architecture of collagen fiber bundles, conferring both anisotropy and nonlinearity to their elastic behavior. Transverse isotropy has often been assumed for a subset of these tissues that have a single macroscopically-identifiable preferred fiber direction. Micro-structural studies, however, suggest that, in some tissues, collagen fibers are approximately normally distributed about a mean preferred fiber direction. Structural constitutive equations that account for this dispersion of fibers have been shown to capture the mechanical complexity of these tissues quite well. Such descriptions, however, are computationally cumbersome for two-dimensional (2D) fiber distributions, let alone for fully three-dimensional (3D) fiber populations. In this paper, we develop a new constitutive law for such tissues, based on a novel invariant theory for dispersed transverse isotropy. The invariant theory is based on a novel closed-form ''splay invariant'' that can easily handle 3D fiber populations, and that only requires a single parameter in the 2D case. The model is polyconvex and fits biaxial data for aortic valve tissue as accurately as the standard structural model. Modification of the fiber stress-strain law requires no re-formulation of the constitutive tangent matrix, making the model flexible for different types of soft tissues. Most importantly, the model is computationally expedient in a finite-element analysis, demonstrated by modeling a bioprosthetic heart valve.

Freed, Alan D.; Einstein, Daniel R.; Vesely, Ivan

2005-11-01T23:59:59.000Z

468

NREL: Department of Defense Energy Programs - NREL Leads Demo...  

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

correction, peak load demand shifting, frequency regulation, load management and demand response, voltage support, and uninterruptable power for grid failure ride-through. From a...

469

NREL: Buildings Research - NREL Leads Demo of New Energy Management...  

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

correction, peak load demand shifting, frequency regulation, load management and demand response, voltage support, and uninterruptable power for grid failure ride-through. From a...

470

Alternative Fuels Data Center: Conversion Regulations  

Alternative Fuels and Advanced Vehicles Data Center [Office of Energy Efficiency and Renewable Energy (EERE)]

Conversion Regulations Conversion Regulations to someone by E-mail Share Alternative Fuels Data Center: Conversion Regulations on Facebook Tweet about Alternative Fuels Data Center: Conversion Regulations on Twitter Bookmark Alternative Fuels Data Center: Conversion Regulations on Google Bookmark Alternative Fuels Data Center: Conversion Regulations on Delicious Rank Alternative Fuels Data Center: Conversion Regulations on Digg Find More places to share Alternative Fuels Data Center: Conversion Regulations on AddThis.com... Conversion Regulations All vehicle and engine conversions must meet standards instituted by the U.S. Environmental Protection Agency (EPA), the National Highway Traffic Safety Administration (NHTSA), and state agencies like the California Air Resources Board (CARB).

471

Protocol, Site Leads - May 2011 | Department of Energy  

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

Site Leads - May 2011 Site Leads - May 2011 Protocol, Site Leads - May 2011 May 2011 Protocol for Site Leads The purpose of this protocol is to establish the requirements and responsibilities for the Office of Safety and Emergency Management Evaluations Site Leads. The Site Lead's primary responsibility is to perform independent safety oversight at their assigned site(s). Site Leads are assigned to Department of Energy (DOE) sites with nuclear facilities to maintain operational awareness, establish and implement a prioritized set of oversight activities focused on high hazard nuclear facilities and tailored to site conditions, activities and issues. Protocol, Site Leads - May 2011 More Documents & Publications Appraisal Process Protocols, Independent Oversight - November 2012

472

Protocol, Site Leads - May 2011 | Department of Energy  

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

Protocol, Site Leads - May 2011 Protocol, Site Leads - May 2011 Protocol, Site Leads - May 2011 May 2011 Protocol for Site Leads The purpose of this protocol is to establish the requirements and responsibilities for the Office of Safety and Emergency Management Evaluations Site Leads. The Site Lead's primary responsibility is to perform independent safety oversight at their assigned site(s). Site Leads are assigned to Department of Energy (DOE) sites with nuclear facilities to maintain operational awareness, establish and implement a prioritized set of oversight activities focused on high hazard nuclear facilities and tailored to site conditions, activities and issues. Protocol, Site Leads - May 2011 More Documents & Publications Appraisal Process Protocols, Independent Oversight - November 2012

473

Systems Engineering Leading Indicators Guide, Version 1.0  

E-Print Network [OSTI]

The Systems Engineering Leading Indicators guide set reflects the initial subset of possible indicators that were considered to be the highest priority for evaluating effectiveness before the fact. A leading indicator is ...

Lean Advancement Initiative

2013-10-31T23:59:59.000Z

474

Lab Discovery: Water Leads to Chemical that "Gunks Up" Biofuels...  

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

Lab Discovery: Water Leads to Chemical that "Gunks Up" Biofuels Production Lab Discovery: Water Leads to Chemical that "Gunks Up" Biofuels Production November 20, 2014 - 12:16pm...

475

Solar Decathlon Team Leading the Way Toward Sustainable Living...  

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

Leading the Way Toward Sustainable Living, Even in the Wake of Disasters Solar Decathlon Team Leading the Way Toward Sustainable Living, Even in the Wake of Disasters August 18,...

476

DOE ZERH Second Leading Builder Round Table Meeting Report  

Broader source: Energy.gov [DOE]

On October 23rd-24th, 2014, the ZERH program held its Second Leading Production Builder Round Table Meeting in Suwanee, GA. The purpose was to provide top executives from leading builders with a...

477

Lead levels in the water of suburban Glasgow  

Science Journals Connector (OSTI)

... per ml RBC per min (Units). Blood and water lead levels were measured by flameless atomic absorption spectrophotometry (Table 1).

GAIL ADDIS; MICHAEL R. MOORE

1974-11-08T23:59:59.000Z

478

Childhood Lead Poisoning Prevention Program Community Awareness Pilot  

E-Print Network [OSTI]

Childhood Lead Poisoning Prevention Program Community Awareness Pilot #12;1 THE GOOD NEWS- Exposure solder, and brass faucets). A

479

Reduced regulator dependence of neutron-matter predictions with chiral interactions  

E-Print Network [OSTI]

We calculate the energy per particle in infinite neutron matter perturbatively using chiral N3LO two-body potentials plus N2LO three-body forces. The cutoff dependence of the predictions is investigated by employing chiral interactions with different regulators. We find that the inclusion of three-nucleon forces, which are consistent with the applied two-nucleon interaction, leads to a strongly reduced regulator dependence of the results.

L. Coraggio; J. W. Holt; N. Itaco; R. Machleidt; F. Sammarruca

2012-09-25T23:59:59.000Z

480

Lead-Free Surface Finishes for Electronic Components  

E-Print Network [OSTI]

Lead-Free Surface Finishes for Electronic Components: Tin Whisker Growth METALS This project degraded by the switch to lead- free technology. In particular, the state of compressive stress and the localized creep response (whisker growth) of tin-based lead-free electrodeposits are being measured

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


481

The Value of Lead Logistics Services Oliver Schneider1  

E-Print Network [OSTI]

The Value of Lead Logistics Services Oliver Schneider1 , Andr� Lindner2 1 ETH Zurich, Center Schindellegi, Switzerland andre.lindner@kuehne-nagel.com Abstract. Logistics Services are one of the most was developed in a collaborative action research project with a world leading provider of lead logistics

Boyer, Edmond

482

Nonlinear voltages in multiple-lead coherent conductors  

Science Journals Connector (OSTI)

We use the generalized S-matrix approach to study multiple-lead coherent conductors in the case of finite applied voltages. In this framework we discuss the transverse voltage arising in a four-lead conductor with two symmetric biased leads.

Gordey B. Lesovik and Carlo Presilla

1993-01-15T23:59:59.000Z

483

Technical Note Ultrasound Probe with Integrated ECG Lead: Feasibility Study  

E-Print Network [OSTI]

Technical Note Ultrasound Probe with Integrated ECG Lead: Feasibility Study ARCHANA RAMIREDDY 27708 stephen.w.smith@duke.edu We integrated electrocardiogram (ECG) leads onto the face of a cardiac of devices needed to col- lect cardiac information. Since the ECG leads were not placed on their standard

Smith, Stephen

484

2011 Air Quality Regulations Report | Department of Energy  

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

Air Quality Regulations Report 2011 Air Quality Regulations Report 2011 Air Quality Regulations Report120111.pdf More Documents & Publications 2011:...

485

Self-regulated reionization  

E-Print Network [OSTI]

Recently, we have presented the first large-scale radiative transfer simulations of reionization. Here we present new simulations which extend the source halo mass range downward to 10^8M_solar, to capture the full range of halo masses thought to be primarily responsible for reionization by their star formation following atomic hydrogen radiative cooling and gravitational collapse. Haloes below about 10^9M_solar, however, are subject to Jeans-mass filtering in the ionized regions, which suppresses their baryonic content and their ability to release ionizing radiation. By including these smaller-mass haloes but accounting for their suppression, too, we find that reionization is ``self-regulating,'' as follows. As the mean ionized fraction rises, so does the fraction of the volume within which suppression occurs. Hence, the degree of suppression is related to the mean ionized fraction. Since low-mass haloes with high emissivity achieve a given mean ionized fraction earlier than do those with low efficiency, Jeans-mass filtering compensates for the difference in the emissivity of the suppressible haloes in these two cases. As a result, in the presence of lower-mass source haloes, reionization begins earlier, but the later stages of reionization and the time of overlap are dictated by the efficiency of the higher-mass haloes, independent of the efficiency of the suppressible, lower-mass haloes. Reionization histories consistent with current observational constraints are shown to be achievable with standard stellar sources in haloes above 10^8M_solar. Neither minihalos nor exotic sources are required, and the phenomenon of ``double reionization'' previously suggested does not occur. (abridged)

Ilian T. Iliev; Garrelt Mellema; Paul R. Shapiro; Ue-Li Pen

2006-07-22T23:59:59.000Z

486

Materials Science and Engineering B 117 (2005) 5361 Finite element analysis-based design of a fluid-flow control nano-valve  

E-Print Network [OSTI]

of a fluid-flow control nano-valve M. Grujicica,, G. Caoa, B. Pandurangana, W.N. Royb a Department A finite element method-based procedure is developed for the design of molecularly functionalized nano-size devices. The procedure is aimed at the single-walled carbon nano-tubes (SWCNTs) used in the construction

Grujicic, Mica

487

Chapter 2 of the Wyoming Public Service Commission Regulations...  

Open Energy Info (EERE)

the Wyoming Public Service Commission Regulations: General Regulations Jump to: navigation, search OpenEI Reference LibraryAdd to library Legal Document- RegulationRegulation:...

488

Mechanisms for left ventricular systolic dysfunction in aortic regurgitation: Importance for predicting the functional response to aortic valve replacement  

Science Journals Connector (OSTI)

To test the hypothesis that the combined use of the time-varying distance concept and conventional circumferential stress-shortening relations would elucidate differential mechanisms for left ventricular systolic dysfunction in severe, chronic aortic regurgitation and therefore predict the functional responses to aortic valve replacement, 31 control patients and 37 patients with aortic regurgitation were studied. The studies included micromanometer left ventricular pressure determinations, biplane contrast cineangiograms under control conditions and radionuclide angiograms under control conditions and during methoxamine or nitroprusside infusions with right atrial pacing. The patients with aortic regurgitation were classified into three groups: Group I had normal Emax and stress-shortening relations, Group II had abnormal Emax but normal stress-shortening relations and Group III had abnormal Emax and stress-shortening relations. The left ventricular end-diastolic and end-systolic volumes showed a progressive increase and the ejection fraction showed a progressive decrease from Group I to III; these values differed from those in the control patients (p < 0.001). In Group I, then was a decrease in left ventricular volumes (p < 0.05) but no significant change in ejection fraction (61 ± 7% versus 63 ± 4%) after aortic valve replacement. In contrast, in Group II, reduction in left ventricular volumes (p < 0.01) was associated with an increase in ejection fraction from 50 ± 8% to 64 ± 11% (p < 0.01). Finally, in Group III, reduction in left ventricular volumes (p < 0.05) was associated with a further decrement in ejection fraction from 35 ± 13% to 30 ± 13%. Group I patients had compensated adequately for chronic volume overload. However, Group II had left ventricular dysfunction that was associated with an increase in the left ventricular volume/mass ratio compared with that in the control patients and Group I (p < 0.05 for both), suggesting inadequate hypertrophy and assumption of spherical geometry. Finally, irreversible myocardial dysfunction had supervened in Group III. In conclusion, a combined analysis of left ventricular chamber performance using the time-varying elastance concept and myocardial performance using conventional circumferential stress-shortening relations provides complementary information that elucidates differential mechanisms for left ventricular systolic dysfunction and therefore predicts the functional response to aortic valve replacement.

Mark R. Starling; Marvin M. Kirsh; Daniel G. Montgomery; Milton D. Gross

1991-01-01T23:59:59.000Z

489

A two-dimensional mathematical model of a porous lead dioxide electrode in a lead-acid cell  

E-Print Network [OSTI]

rechargeability of the lead-acid battery make it the single most widely used battery system worldwide (1). The applications of the battery system vary from small sealed batteries for consumer use to the large load levelling systems for electric utilities (2... current density distribution would lead to inefficient use oi' the porous electrodes and, subsequently, would lower the performance of each cell in a battery. A number of factors could lead to nonuniform current distribution. In a typical lead-acid cell...

Dimpault-Darcy, Eric Christophe

2012-06-07T23:59:59.000Z

490

Vermont Hazardous Waste Management Regulations (Vermont)  

Broader source: Energy.gov [DOE]

These regulations are intended to protect public health and the environment by comprehensively regulating the generation, storage, collection, transport, treatment, disposal, use, reuse, and...

491

Price regulation for waste hauling franchises in California: an examination of how regulators regulate pricing and the effects of competition on regulated markets  

E-Print Network [OSTI]

Thomadakis, Stavros. “Price Regulation Under Uncertainty in698. Bös, Dieter. Pricing and Price Regulation. Elsevier.Optimal Structure of Public Prices. ” The American Economic

Seltzer, Steven A.

2011-01-01T23:59:59.000Z

492

Aquifer Protection Area Land Use Regulations (Connecticut)  

Broader source: Energy.gov [DOE]

These regulations describe allowable activities within aquifer protection areas, the procedure by which such areas are delineated, and relevant permit requirements. The regulations also describe...

493

Camptothecine, a selective plant growth regulator  

Science Journals Connector (OSTI)

Camptothecine, a selective plant growth regulator ... The literature documents several hundred plant products that appear to exhibit growth-regulating activity. ...

J. George Buta; Joseph F. Worley

1976-05-01T23:59:59.000Z

494

International Electricity Regulation | Department of Energy  

Office of Environmental Management (EM)

Regulation International Electricity Regulation U.S. trade in electric energy with Canada and Mexico is rising, bringing economic and reliability benefits to the United States and...

495

Vehicle Technologies Office: Regulated Fleets | Department of...  

Energy Savers [EERE]

Alternative Fuels Vehicle Technologies Office: Regulated Fleets Vehicle Technologies Office: Regulated Fleets The Office of Energy Efficiency and Renewable Energy (EERE) manages...

496

Alaska ADEC Wetlands Regulation | Open Energy Information  

Open Energy Info (EERE)

Regulation Jump to: navigation, search OpenEI Reference LibraryAdd to library Web Site: Alaska ADEC Wetlands Regulation Author Alaska Division of Water Published Alaska Department...

497

Lead concentrations in blood and milk from periparturient dairy heifers seven months after an episode of acute lead toxicosis  

SciTech Connect (OSTI)

In September 1988, 100 of 300 yearling dairy heifers developed blindness, tachypnea, foaming at the mouth, chewing, and facial fasciculations. Twenty-five animals died. Lead toxicosis was diagnosed based on the clinical signs and the presence of excessive concentrations of lead in whole blood, liver, kidney, and rumen contents of affected animals. The source of the lead was sudan grass silage that had been contaminated by soil that contained up to 77,000 mg/kg of lead. Lead concentrations were determined approximately 7 months after the acute episode of lead toxicosis. Whole blood and milk samples were obtained from heifers and a group of control cows 2 weeks prior to (blood only), at the time of, and 2 and 4 weeks after freshening. No lead was found in any of the milk samples (detection limit = 0.055 mg/liter). Animals that had been severely affected by lead toxicosis experienced a transient increase in whole blood lead concentrations at freshening that was not high enough to be considered toxic. No similar increases in blood lead were observed for control cows or heifers that had experienced milder toxicosis. These findings suggest that at parturition lead is mobilized into the blood of cattle previously exposed to excessive lead.

Galey, F.D.; Slenning, B.D.; Anderson, M.L.; Breneman, P.C.; Littlefield, E.S.; Melton, L.A.; Tracy, M.L. (California Veterinary Diagnostic Laboratory System-Toxicology Laboratory, University of California, Davis (USA))

1990-07-01T23:59:59.000Z

498

Private Regulation of Consumer Arbitration  

E-Print Network [OSTI]

Arbitration providers, such as the American Arbitration Association (“AAA”) and JAMS, have promulgated due process protocols to regulate the fairness of consumer and employment arbitration agreements. A common criticism of these due process...

Drahozal, Christopher R.; Zyontz, Samantha

2012-01-01T23:59:59.000Z

499

Kansas Air Quality Regulations (Kansas)  

Broader source: Energy.gov [DOE]

All new air contaminant emission sources or alterations to emission sources that are required to be reported shall be in compliance with all applicable emission control regulations at the time that...

500

Water Quality Regulations (Rhode Island)  

Broader source: Energy.gov [DOE]

The purpose of these regulations is to establish water quality standards for the state's surface waters. These standards are intended to restore, preserve and enhance the physical, chemical and...