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Note: This page contains sample records for the topic "vortex tube project" from the National Library of EnergyBeta (NLEBeta).
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1

Finned Tube With Vortex Generators For A Heat Exchanger.  

DOE Patents (OSTI)

A system for and method of manufacturing a finned tube for a heat exchanger is disclosed herein. A continuous fin strip is provided with at least one pair of vortex generators. A tube is rotated and linearly displaced while the continuous fin strip with vortex generators is spirally wrapped around the tube.

Sohal, Monohar S. (Idaho Falls, ID); O' Brien, James E. (Idaho Falls, ID)

2004-09-14T23:59:59.000Z

2

Finned Tube With Vortex Generators For A Heat Exchanger.  

DOE Patents (OSTI)

A system for and method of manufacturing a finned tube for a heat exchanger is disclosed herein. A continuous fin strip is provided with at one pair of vortex generators. A tube is rotated and linearly displaced while the continuous fin strip with vortex generators is spirally wrapped around the tube.

Sohal, Manohar S. (Idaho Falls, ID); O' Brien, James E. (Idaho Falls, ID)

2005-12-20T23:59:59.000Z

3

ANALYTICAL STUDY OF SOME ASPECTS OF VORTEX TUBES FOR GAS-PHASE FISSION HEATING  

DOE Green Energy (OSTI)

Several problems connected with vortex cavity reactors were studied analytically. They include, the generation of high-strength vortices by utilization of bleed through a porous tube wall to stabilize the shear layer on the wall; the nuclear criticality problem; the suitability of various compounds of plutonium as gaseous fissionable materials; and the problem of retaining the fission fragments within the vortex tube. It is concluded that the shear layer on the vortex tube wall can be stabilized if a mass flow greater than or equal to the vortex through flow is bled through the porous wall, and that the tangential Mach numbers which can be obtained are then slightly more than one-half the inviscid values. Beryllium oxide or graphite-moderated reactors of reasonable size and weight can attain criticality if the product of the hydrogen pressure in the vortex core and the maximum value of the ratio of fissionable gas density to hydrogen density in the tube is greater than about 100 atm. The reactor weights are then in the order of 10,000 lb or less. Of the several compounds of plutonium considered as gaseous fuel carriers, plutonium trifluoride and plutonium tribromide appear to be the most promising. It is probable that they can be held in gaseous form in hydrogen, under the desired concentrations. The rate of loss of fission fragments from the vortex tube can be reduced to a small fraction of the rate of their generation by making the vortex tubes about twice the minimum size that is allowable for satisfactory retention of the fissionable material. (auth)

Kerrebrock, J.L.; Lafyatis, P.G.

1958-07-21T23:59:59.000Z

4

Heat Transfer Enhancement for Finned-Tube Heat Exchangers with Vortex Generators: Experimental and Numerical Results  

Science Conference Proceedings (OSTI)

A combined experimental and numerical investigation is under way to investigate heat transfer enhancement techniques that may be applicable to large-scale air-cooled condensers such as those used in geothermal power applications. The research is focused on whether air-side heat transfer can be improved through the use of finsurface vortex generators (winglets,) while maintaining low heat exchanger pressure drop. A transient heat transfer visualization and measurement technique has been employed in order to obtain detailed distributions of local heat transfer coefficients on model fin surfaces. Pressure drop measurements have also been acquired in a separate multiple-tube row apparatus. In addition, numerical modeling techniques have been developed to allow prediction of local and average heat transfer for these low-Reynolds-number flows with and without winglets. Representative experimental and numerical results presented in this paper reveal quantitative details of local fin-surface heat transfer in the vicinity of a circular tube with a single delta winglet pair downstream of the cylinder. The winglets were triangular (delta) with a 1:2 height/length aspect ratio and a height equal to 90% of the channel height. Overall mean fin-surface Nusselt-number results indicate a significant level of heat transfer enhancement (average enhancement ratio 35%) associated with the deployment of the winglets with oval tubes. Pressure drop measurements have also been obtained for a variety of tube and winglet configurations using a single-channel flow apparatus that includes four tube rows in a staggered array. Comparisons of heat transfer and pressure drop results for the elliptical tube versus a circular tube with and without winglets are provided. Heat transfer and pressure-drop results have been obtained for flow Reynolds numbers based on channel height and mean flow velocity ranging from 700 to 6500.

O'Brien, James Edward; Sohal, Manohar Singh; Huff, George Albert

2002-08-01T23:59:59.000Z

5

Ultrasonic Acceptance Small Diameter Boiler Tube Butt Weld: Project Status Update  

Science Conference Proceedings (OSTI)

This is an interim report documenting the progress of a multiyear project for developing an alternative ultrasonic testing (UT) acceptance guideline for small diameter boiler tube butt welds.BackgroundHistorically, small diameter boiler tube butt welds have either been examined for defects using radiography or not inspected, with the owner relying only on a hydrostatic pressure test at 1.5 times the design pressure to assess weld quality. This reliance is ...

2013-12-20T23:59:59.000Z

6

Generalized flux-tube solution in Abelian-projected SU(N) gauge theory  

E-Print Network (OSTI)

The [U(1)]^{N-1} dual Ginzburg-Landau (DGL) theory as a low-energy effective theory of Abelian-projected SU(N) gauge theory is formulated in a Weyl symmetric way. The string tensions of flux-tube solutions of the DGL theory associated with color-electric charges in various representations of SU(N) are calculated analytically at the border between type-I and type-II of the dual superconducting vacuum (Bogomol'nyi limit). The resulting string tensions satisfy the flux counting rule, which reflects the non-Abelian nature of gauge theory.

Yoshiaki Koma

2002-08-07T23:59:59.000Z

7

Vortex methods and vortex statistics  

SciTech Connect

Vortex methods originated from the observation that in incompressible, inviscid, isentropic flow vorticity (or, more accurately, circulation) is a conserved quantity, as can be readily deduced from the absence of tangential stresses. Thus if the vorticity is known at time t = 0, one can deduce the flow at a later time by simply following it around. In this narrow context, a vortex method is a numerical method that makes use of this observation. Even more generally, the analysis of vortex methods leads, to problems that are closely related to problems in quantum physics and field theory, as well as in harmonic analysis. A broad enough definition of vortex methods ends up by encompassing much of science. Even the purely computational aspects of vortex methods encompass a range of ideas for which vorticity may not be the best unifying theme. The author restricts himself in these lectures to a special class of numerical vortex methods, those that are based on a Lagrangian transport of vorticity in hydrodynamics by smoothed particles (``blobs``) and those whose understanding contributes to the understanding of blob methods. Vortex methods for inviscid flow lead to systems of ordinary differential equations that can be readily clothed in Hamiltonian form, both in three and two space dimensions, and they can preserve exactly a number of invariants of the Euler equations, including topological invariants. Their viscous versions resemble Langevin equations. As a result, they provide a very useful cartoon of statistical hydrodynamics, i.e., of turbulence, one that can to some extent be analyzed analytically and more importantly, explored numerically, with important implications also for superfluids, superconductors, and even polymers. In the authors view, vortex ``blob`` methods provide the most promising path to the understanding of these phenomena.

Chorin, A.J.

1993-05-01T23:59:59.000Z

8

Vortex Energy | Open Energy Information  

Open Energy Info (EERE)

by expanding it. Vortex Energy is a company located in Germany . References "Vortex Energy" Retrieved from "http:en.openei.orgwindex.php?titleVortexEnergy&oldid352892...

9

APSTNG: Associated particle sealed-tube neutron generator studies for arms control. Final report on NN-20 Project ST220  

SciTech Connect

Argonne National Laboratory has performed research and development on the use of Associated Particle Sealed-Tube Neutron Generator (APSTNG) technology for treaty verification and non-proliferation applications, under funding from the DOE Office of Nonproliferation and National Security. Results indicate that this technology has significant potential for nondestructively detecting elemental compositions inside inspected objects or volumes. The final phase of this project was placement of an order for commercial procurement of an advanced sealed tube, with its high-voltage supply and control systems. Procurement specifications reflected lessons learned during the study. The APSTNG interrogates a volume with a continuous 14-MeV neutron flux. Each neutron is emitted coincident with an {open_quotes}associated{close_quotes} alpha-particle emitted in the opposite direction. Thus detection of an alpha-particle marks the emission of a neutron in a cone opposite to that defined by the alpha detector. Detection of a gamma ray coincident with the alpha indicates that the gamma was emitted from a neutron-induced reaction inside the neutron cone: the gamma spectra can be used to identify fissionable materials and many isotopes having an atomic number larger than that of boron. The differences in gamma-ray and alpha-particle detection times yield a coarse measurement of the distance along the cone axis from the APSTNG emitter to each region containing the identified nuclide. A position-sensitive alpha detector would permit construction of coarse three-dimensional images. The source and emission-detection systems can be located on the same side of the interrogated volume. The neutrons and gamma rays are highly penetrating. A relatively high signal-to-background ratio allows the use of a relatively small neutron source and conventional electronics.

Rhodes, E.; Dickerman, C.E.; Brunner, T.; Hess, A.; Tylinski, S.

1994-12-01T23:59:59.000Z

10

Twisted vortex state  

E-Print Network (OSTI)

We study a twisted vortex bundle where quantized vortices form helices circling around the axis of the bundle in a "force-free" configuration. Such a state is created by injecting vortices into rotating vortex-free superfluid. Using continuum theory we determine the structure and the relaxation of the twisted state. This is confirmed by numerical calculations. We also present experimental evidence of the twisted vortex state in superfluid 3He-B.

V. B. Eltsov; A. P. Finne; R. Hanninen; J. Kopu; M. Krusius; M. Tsubota; E. V. Thuneberg

2006-02-28T23:59:59.000Z

11

Final report: Research project chemical milling of counterbore recesses in the uranium wall of Zircaloy-2 clad uranium tubes  

SciTech Connect

This report discusses the development of an etchant composition to chemically mill counterbore recesses in each end of the uranium walls of Zircaloy-2 clad uranium tubes.

Atkins, D.C. [United States Chemical Milling Corp., Manhattan Beach, CA (United States)

1994-07-01T23:59:59.000Z

12

Electron tube  

DOE Patents (OSTI)

An electron tube of the present invention includes: a vacuum vessel including a face plate portion made of synthetic silica and having a surface on which a photoelectric surface is provided, a stem portion arranged facing the photoelectric surface and made of synthetic silica, and a side tube portion having one end connected to the face plate portion and the other end connected to the stem portion and made of synthetic silica; a projection portion arranged in the vacuum vessel, extending from the stem portion toward the photoelectric surface, and made of synthetic silica; and an electron detector arranged on the projection portion, for detecting electrons from the photoelectric surface, and made of silicon.

Suyama, Motohiro (Hamamatsu, JP); Fukasawa, Atsuhito (Hamamatsu, JP); Arisaka, Katsushi (Los Angeles, CA); Wang, Hanguo (North Hills, CA)

2011-12-20T23:59:59.000Z

13

Improved vortex reactor system  

DOE Patents (OSTI)

An improved vortex reactor system for affecting fast pyrolysis of biomass and Refuse Derived Fuel (RDF) feed materials comprising: a vortex reactor having its axis vertically disposed in relation to a jet of a horizontally disposed steam ejector that impels feed materials from a feeder and solids from a recycle loop along with a motive gas into a top part of said reactor.

Diebold, James P. (Lakewood, CO); Scahill, John W. (Evergreen, CO)

1995-01-01T23:59:59.000Z

14

Electron trapping by a current vortex F. Bentosela, a;b P. Exner, c;d and V.A. Zagrebnov a;b  

E-Print Network (OSTI)

with the magnetic field due to an electric current forming a localized rotationally symmetric vortex. We show simpler example involves a Pauli electron interacting with a flux tube modelling a vortex magnetic field field Ansatz. To illustrate this point we analyze in this letter the situation where the vortex current

15

Tube support  

Science Conference Proceedings (OSTI)

A tube support for supporting horizontal tubes from an inclined vertical support tube passing between the horizontal tubes. A support button is welded to the vertical support tube. Two clamping bars or plates, the lower edges of one bearing on the support button, are removably bolted to the inclined vertical tube. The clamping bars provide upper and lower surface support for the horizontal tubes.

Mullinax, Jerry L. (Green Township, Summit County, OH)

1988-01-01T23:59:59.000Z

16

Controlled Vortex Breakdown on Modified Delta Wings  

Science Conference Proceedings (OSTI)

This paper studies the effect of perturbation to the breakdown of the leading-edge vortices over delta wings. The passive perturbation in the normal direction is achieved by installing the hemisphere-like bulges on the delta wing along the projection ... Keywords: Bulge perturbation, Delta wing, Vortex breakdown

S. Srigrarom; N. Lewpiriyawong

2007-08-01T23:59:59.000Z

17

Vortex Hydro Energy LLC | Open Energy Information  

Open Energy Info (EERE)

Hydro Energy LLC Hydro Energy LLC Jump to: navigation, search Name Vortex Hydro Energy LLC Address 4870 West Clark Rd Suite 108 Place Ypsilanti Zip 48197 Sector Marine and Hydrokinetic Phone number 734.971.4020 Website http://www.vortexhydroenergy.c Region United States LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This company is listed in the Marine and Hydrokinetic Technology Database. This company is involved in the following MHK Projects: Marine Hydrodynamics Laboratory at the University of Michigan This company is involved in the following MHK Technologies: Vortex Induced Vibrations Aquatic Clean Energy VIVACE This article is a stub. You can help OpenEI by expanding it. Retrieved from "http://en.openei.org/w/index.php?title=Vortex_Hydro_Energy_LLC&oldid=678497

18

VORTEX.PDF  

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

vortex generator. Figure 5. The fan in its plenum-a two-speed stove fan mounted in a plywood box. It provides a vacuum at the top of the generator. The ruler is six inches long....

19

Improved vortex reactor system  

DOE Patents (OSTI)

An improved vortex reactor system is described for affecting fast pyrolysis of biomass and Refuse Derived Fuel (RDF) feed materials comprising: a vortex reactor having its axis vertically disposed in relation to a jet of a horizontally disposed steam ejector that impels feed materials from a feeder and solids from a recycle loop along with a motive gas into a top part of said reactor. 12 figs.

Diebold, J.P.; Scahill, J.W.

1995-05-09T23:59:59.000Z

20

MHK Technologies/Vortex Induced Vibrations Aquatic Clean Energy VIVACE |  

Open Energy Info (EERE)

Vortex Induced Vibrations Aquatic Clean Energy VIVACE Vortex Induced Vibrations Aquatic Clean Energy VIVACE < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage Vortex Induced Vibrations Aquatic Clean Energy VIVACE.jpg Technology Profile Primary Organization Vortex Hydro Energy LLC Project(s) where this technology is utilized *MHK Projects/Marine Hydrodynamics Laboratory at the University of Michigan Technology Resource Click here Current/Tidal Technology Type Click here Reciprocating Device Technology Readiness Level Click here TRL 4: Proof of Concept Technology Description The VIVACE (Vortex Induced Vibrations Aquatic Clean Energy) device is based on the extensively studied phenomenon of Vortex Induced Vibrations (VIV), which was first observed five-hundred years ago by Leonardo DaVinci in the form of 'Aeolian Tones.' VIV results from vortices forming and shedding on the downstream side of a bluff body in a current. Vortex shedding alternates from one side to the other, thereby creating a vibration or oscillation. The VIV phenomenon is non-linear, which means it can produce useful energy at high efficiency over a wide range of current speeds and directions.This converter is unlike any existing technology, as it does not use turbines, propellers, or dams. VIVACE converts the horizontal hydrokinetic energy of currents into cylinder mechanical energy. The latter is then converted to electricity through electric power generators.

Note: This page contains sample records for the topic "vortex tube project" 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

NETL F 451.1-1/1 Categorical Exclusion (CX) Designation Form  

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

DOENETL FE 0513 ORD 2011 John Ontko Approx. one month NETL: Morgantown, WV Vortex Tube Project Decommissioning Project Decommissioning of Vortex Tube project located in Buildings...

22

TUBE TESTER  

DOE Patents (OSTI)

This patent relates to tube testing, and in particular describes a tube tester for automatic testing of a number of vacuum tubes while in service and as frequently as may be desired. In it broadest aspects the tube tester compares a particular tube with a standard tube tarough a difference amplifier. An unbalanced condition in the circuit of the latter produced by excessive deviation of the tube in its characteristics from standard actuates a switch mechanism stopping the testing cycle and indicating the defective tube.

Gittings, H.T. Jr.; Kalbach, J.F.

1958-01-14T23:59:59.000Z

23

Waste-heat vertical tube foam evaporation for cooling tower blowdown renovation/recycle. Project summary report  

SciTech Connect

A prototype waste-heat vertical tube foam evaporation (WH-VTFE) plant was designed, constructed, and field-tested for reducing power plant cooling tower blowdown to a small residual volume of solids slurried in brine, while producing distilled water for reuse. Facility design was based on previously-developed pilot plant test data. The WH-VTFE facility was constructed for initial parametric testing in upflow/downflow evaporation modes with boiler steam. The field test/demonstration phase was conducted at a power plant site using turbine exhaust steam for the up to 50-fold cooling tower blowdown concentration in a foamy-flow seed-slurried mode of downflow vertical tube evaporation. The VTFE heat transfer coefficient ranged between 5600 to 9000 W/sq m/degree, over 4-fold the level considered as acceptable in another study. Further, a sufficient temperature difference is available within a typical power plant heat rejection system to operate a WH-VTFE when the plant load is above 50% of its design capacity. Scale formed from inadequate brine recycle rates was readily removed by recycling fresh water through the evaporator to restore the high heat transfer performance of the WH-VTFE. It was concluded that WH-VTFE was demonstrated as feasible and commercially viable.

Sephton, H.H.; Someahsaraii, K.

1982-02-01T23:59:59.000Z

24

Argonne CNM Highlight: Biofunctionalized magnetic-vortex microdiscs for  

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

Biofunctionalized magnetic-vortex microdiscs for targeted cancer-cell destruction Biofunctionalized magnetic-vortex microdiscs for targeted cancer-cell destruction Magnetic microdisks Reflection optical microscope image of a dried suspension of the discs prepared via magnetron sputtering and optical lithography. Magnetic spin vortex Model of magnetic-vortex spin distribution in a disc. Users from Argonne's Materials Science Division and University of Chicago's Pritzker School of Medicine, working collaboratively on a user science project with CNM's Nanobio Interfaces Group, have discovered that nanostructured magnetic materials offer exciting avenues for probing cell mechanics, activating mechanosensitive ion channels, and advancing potential cancer therapies. Their new report describes an approach based on interfacing cells with lithographically defined microdiscs (1-micron

25

Impact of a vortex ring on a density interface using a regularized inviscid vortex sheet method  

Science Conference Proceedings (OSTI)

A new, fully three-dimensional, vortex-in-cell method designed to follow the unsteady motion of inviscid vortex sheets with or without small (Boussinesq) density discontinuities is presented. As is common in front-tracking methods, the vortex sheet is ... Keywords: Density discontinuity, Stratified flow, Vortex methods, Vortex sheet dynamics, Vortex-in-cell

Mark J. Stock; Werner J. A. Dahm; Grétar Tryggvason

2008-11-01T23:59:59.000Z

26

Tube Forming  

Science Conference Proceedings (OSTI)

...The rear-axle housing shown in Fig. 19 was produced from 1035 steel tubing in seven manufacturing operations.

27

Vortex lattices in layered superconductors  

Science Conference Proceedings (OSTI)

We study vortex lattices in a superconductor--normal-metal superlattice in a parallel magnetic field. Distorted lattices, resulting from the shear deformations along the layers, are found to be unstable. Under field variation, nonequilibrium configurations undergo an infinite sequence of continuous transitions, typical for soft lattices. The equilibrium vortex arrangement is always a lattice of isocell triangles, without shear.

Prokic, V. (Department of Physics, University of Belgrade, P.O. Box 368, 11001 Belgrade (Yugoslavia)); Davidovic, D. (Department of Physics and Astronomy, The Johns Hopkins University, Bloomberg Center, Baltimore, Maryland 21218 (United States) Institute of Physics, P.O. Box 57, 11001 Belgrade (Yugoslavia)); Dobrosavljevic-Grujic, L. (Institute of Physics, P.O. Box 57, 11001 Belgrade (Yugoslavia))

1995-03-01T23:59:59.000Z

28

Variable residence time vortex combustor  

DOE Patents (OSTI)

A variable residence time vortex combustor including a primary combustion chamber for containing a combustion vortex, and a plurality of louvres peripherally disposed about the primary combustion chamber and longitudinally distributed along its primary axis. The louvres are inclined to impel air about the primary combustion chamber to cool its interior surfaces and to impel air inwardly to assist in driving the combustion vortex in a first rotational direction and to feed combustion in the primary combustion chamber. The vortex combustor also includes a second combustion chamber having a secondary zone and a narrowed waist region in the primary combustion chamber interconnecting the output of the primary combustion chamber with the secondary zone for passing only lower density particles and trapping higher density particles in the combustion vortex in the primary combustion chamber for substantial combustion.

Melconian, Jerry O. (76 Beaver Rd., Reading, MA 01867)

1987-01-01T23:59:59.000Z

29

Pressure Tubes  

Science Conference Proceedings (OSTI)

Table 8   Specifications for carbon and alloy steel pressure tubes (ASTM)...medium-strength carbon-molybdenum alloy

30

Blade-Vortex Interactions in High Pressure Steam Turbines  

E-Print Network (OSTI)

A detailed experimental and numerical investigation of the transport of streamwise (passage) vortices in high-pressure axial turbines and their interaction with the downstream blade rows was performed. The results indicate large variations in the downstream flow field, notably the development of the secondary flows. The mechanism of passage vortex transport was studied in two differently configured high-pressure turbine stages. In the first configuration, the blades are radially stacked while the second configuration features three-dimensionally stacked high-pressure steam turbine blading. The stator hub passage vortex is chopped by the downstream blade row in a similar way to the wake. The bowed vortex tube near the inlet to the rotor appeared to develop two counter-rotating legs extending back to the leading edges of the adjacent blades. These were termed the suction side leg and the pressure side leg. The two legs of the incoming passage vortex then convect with the respective velocities on the blade surfaces. The results are discussed for the radially stacked turbine and the 3-D turbine separately.

Venkata Siva Prasad Chaluvadi

2000-01-01T23:59:59.000Z

31

Vortex–Vortex Interactions in the Winter Stratosphere  

Science Conference Proceedings (OSTI)

This paper examines the interaction of oppositely signed vortices in the compressible (non-Boussinesq) quasigeostrophic system, with a view to understanding vortex interactions in the polar winter stratosphere. A series of simplifying ...

R. K. Scott; D. G. Dritschel

2006-02-01T23:59:59.000Z

32

BWRVIP-274: BWR Vessel and Internals Project, Evaluation of On-Line NobleChemTM Platinum Deposition on Grand Gulf Dry Tubes  

Science Conference Proceedings (OSTI)

Grand Gulf Nuclear Station (GGNS) removed nuclear instrumentation detector dry tubes from the reactor during their 2012 refueling outage due to cracks in the plunger tubes. The report describes the results from three tubes that were scraped on site in October 2012 to obtain samples of the platinum (Pt) deposition resulting from On-Line NobleChemTM (OLNC) applications done in 2010 and 2011.BackgroundOLNC along with hydrogen injection is used by ...

2013-05-09T23:59:59.000Z

33

Photomultiplier Tube Home  

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

Project Homepage Project Homepage Classroom Projects Homepage - Teacher Homepage - Student Homepage Abstract: Photons are created in scintillator devices in most modern particle detectors. These photons yield information about particle collisions that must be measured and decoded. This Website follows the track of a photon as it enters a photomultiplier tube (pmt), an amplifying device that increases the effect of a single photon to levels that are measurable. This signal amplification is crucial; without it, no information exists for decoding. The site presents information regarding the innards of a pmt and allows students to investigate predictive mathematical models describing the signal increase under different, adjustable parameters. Introduction to Research: Photomultipler tubes are omnipresent in particle physics. Understanding the

34

Protective tubes for sodium heated water tubes  

DOE Patents (OSTI)

A heat exchanger in which water tubes are heated by liquid sodium which minimizes the results of accidental contact between the water and the sodium caused by failure of one or more of the water tubes. A cylindrical protective tube envelopes each water tube and the sodium flows axially in the annular spaces between the protective tubes and the water tubes.

Essebaggers, Jan (39 Honeyman Dr., Succasunna, NJ 07876)

1979-01-01T23:59:59.000Z

35

Multiple tube premixing device  

SciTech Connect

The present application provides a premixer for a combustor. The premixer may include a fuel plenum with a number of fuel tubes and a burner tube with a number of air tubes. The fuel tubes extend about the air tubes.

Uhm, Jong Ho; Varatharajan, Balachandar; Ziminsky, Willy Steve; Kraemer, Gilbert Otto; Yilmaz, Ertan; Lacy, Benjamin; Stevenson, Christian; Felling, David

2012-12-11T23:59:59.000Z

36

Direct Imaging of Antiferromagnetic Vortex States  

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

unique properties for the AFM vortex state. Recently, a research team from Berkeley, Korea, and China has taken the first direct image of an AFM vortex in multilayered magnetic...

37

Vortex ice in nanostructured superconductors  

SciTech Connect

We demonstrate using numerical simulations of nanostructured superconductors that it is possible to realize vortex ice states that are analogous to square and kagome ice. The system can be brought into a state that obeys either global or local ice rules by applying an external current according to an annealing protocol. We explore the breakdown of the ice rules due to disorder in the nanostructure array and show that in square ice, topological defects appear along grain boundaries, while in kagome ice, individual defects appear. We argue that the vortex system offers significant advantages over other artificial ice systems.

Reichhardt, Charles [Los Alamos National Laboratory; Reichhardt, Cynthia J [Los Alamos National Laboratory; Libal, Andras J [Los Alamos National Laboratory

2008-01-01T23:59:59.000Z

38

Transformed Eliassen Balanced Vortex Model  

Science Conference Proceedings (OSTI)

We consider the axisymmetric balanced flow occurring in a thermally forced vortex in which the frictional inflow is confined to a thin boundary layer. Above the boundary layer the absolute angular momentum ½fR2=rv+½fr2 is conserved. We refer to R ...

Wayne H. Schubert; James J. Hack

1983-06-01T23:59:59.000Z

39

Evidence of small-scale magnetic concentrations dragged by vortex motion of solar photospheric plasma  

E-Print Network (OSTI)

Vortex-type motions have been measured by tracking bright points in high-resolution observations of the solar photosphere. These small-scale motions are thought to be determinant in the evolution of magnetic footpoints and their interaction with plasma and therefore likely to play a role in heating the upper solar atmosphere by twisting magnetic flux tubes. We report the observation of magnetic concentrations being dragged towards the center of a convective vortex motion in the solar photosphere from high-resolution ground-based and space-borne data. We describe this event by analyzing a series of images at different solar atmospheric layers. By computing horizontal proper motions, we detect a vortex whose center appears to be the draining point for the magnetic concentrations detected in magnetograms and well-correlated with the locations of bright points seen in G-band and CN images.

Balmaceda, L; Palacios, J; Cabello, I; Domingo, V

2010-01-01T23:59:59.000Z

40

Tube furnace  

DOE Patents (OSTI)

A vermiculite insulated tube furnace is heated by a helically-wound resistance wire positioned within a helical groove on the surface of a ceramic cylinder, that in turn is surroundingly disposed about a doubly slotted stainless steel cylindrical liner. For uniform heating, the pitch of the helix is of shorter length over the two end portions of the ceramic cylinder. The furnace is of large volume, provides uniform temperature, offers an extremely precise programmed heating capability, features very rapid cool-down, and has a modest electrical power requirement.

Foster, K.G.; Frohwein, E.J.; Taylor, R.W.; Bowen, D.W.

1990-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "vortex tube project" 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

Tube Degradation  

E-Print Network (OSTI)

On March 23, 2012, Southern California Edison (SCE) submitted a letter (Reference 1) to the NRC describing actions it planned to take with respect to issues identified in the steam generator (SG) tubes of San Onofre Nuclear Generating Station (SONGS) Units 2 and 3. On March 27,2012, the NRC responded by issuing a Confirmatory Action Letter (CAL) (Reference 2), describing the actions that the NRC and SCE agreed would be completed to address those issues and ensure safe operations. The purpose of this letter is to report the completion of the Unit 2 CAL actions, which are to be completed prior to entry of Unit 2 into

An Edison; Inter Natlonal Compan; Peter T. Dietrich; Elmo E. Collins; Regional Administrator; Region Iv

2012-01-01T23:59:59.000Z

42

Simulations of Dual-Vortex Interaction within Environmental Shear  

Science Conference Proceedings (OSTI)

For over a century it has been known that each vortex in a multiple vortex configuration will move in response to the other vortices. However, despite advances since that time, the complexities of multiple vortex scenarios when sheared ...

Robert E. Hart; Jenni L. Evans

1999-11-01T23:59:59.000Z

43

Tube-in-tube thermophotovoltaic generator  

DOE Patents (OSTI)

A thermophotovoltaic device includes at least one thermal radiator tube, a cooling tube concentrically disposed within each thermal radiator tube and an array of thermophotovoltaic cells disposed on the exterior surface of the cooling tube. A shell having a first end and a second end surrounds the thermal radiator tube. Inner and outer tubesheets, each having an aperture corresponding to each cooling tube, are located at each end of the shell. The thermal radiator tube extends within the shell between the inner tubesheets. The cooling tube extends within the shell through the corresponding apertures of the two inner tubesheets to the corresponding apertures of the two outer tubesheets. A plurality of the thermal radiator tubes can be arranged in a staggered or an in-line configuration within the shell. 8 figs.

Ashcroft, J.; Campbell, B.; DePoy, D.

1998-06-30T23:59:59.000Z

44

Tube-in-tube thermophotovoltaic generator  

DOE Patents (OSTI)

A thermophotovoltaic device includes at least one thermal radiator tube, a cooling tube concentrically disposed within each thermal radiator tube and an array of thermophotovoltaic cells disposed on the exterior surface of the cooling tube. A shell having a first end and a second end surrounds the thermal radiator tube. Inner and outer tubesheets, each having an aperture corresponding to each cooling tube, are located at each end of the shell. The thermal radiator tube extends within the shell between the inner tubesheets. The cooling tube extends within the shell through the corresponding apertures of the two inner tubesheets to the corresponding apertures of the two outer tubesheets. A plurality of the thermal radiator tubes can be arranged in a staggered or an in-line configuration within the shell.

Ashcroft, John (Scotia, NY); Campbell, Brian (Scotia, NY); DePoy, David (Clifton Park, NY)

1998-01-01T23:59:59.000Z

45

A tube-in-tube thermophotovoltaic generator  

DOE Patents (OSTI)

A thermophotovoltaic device includes at least one thermal radiator tube, a cooling tube concentrically disposed within each thermal radiator tube and an array of thermophotovoltaic cells disposed on the exterior surface of the cooling tube. A shell having a first end and a second end surrounds the thermal radiator tube. Inner and outer tubesheets, each having an aperture corresponding to each cooling tube, are located at each end of the shell. The thermal radiator tube extends within the shell between the inner tubesheets. The cooling tube extends within the shell through the corresponding apertures of the two inner tubesheets to the corresponding apertures of the two outer tubesheets. A plurality of the thermal radiator tubes can be arranged in a staggered or an in-line configuration within the shell.

Ashcroft, J.; Campbell, B.; Depoy, D.

1996-12-31T23:59:59.000Z

46

The idea of vortex energy  

E-Print Network (OSTI)

This work formulates and gives grounds for general principles and theorems that question the energy function doctrine and its quantum version as a genuine law of nature without borders of adequacy. The emphasis is on the domain where the energy of systems is conserved -- I argue that only in its tiny part the energy is in the kinetic, potential and thermal forms describable by a generalized thermodynamic potential, whereas otherwise the conserved energy constitutes a whole linked to vortex forces, and can be a factor of things like persistent currents and dark matter.

V. E. Shapiro

2011-09-12T23:59:59.000Z

47

Project  

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

Exploring the Standard Model Exploring the Standard Model       You've heard a lot about the Standard Model and the pieces are hopefully beginning to fall into place. However, even a thorough understanding of the Standard Model is not the end of the story but the beginning. By exploring the structure and details of the Standard Model we encounter new questions. Why do the most fundamental particles have the particular masses we observe? Why aren't they all symmetric? How is the mass of a particle related to the masses of its constituents? Is there any other way of organizing the Standard Model? The activities in this project will elucidate but not answer our questions. The Standard Model tells us how particles behave but not necessarily why they do so. The conversation is only beginning. . . .

48

Heat exchanger tube mounts  

DOE Patents (OSTI)

A heat exchanger in which tubes are secured to a tube sheet by internal bore welding is described. The tubes may be moved into place in preparation for welding with comparatively little trouble. A number of segmented tube support plates are provided which allow a considerable portion of each of the tubes to be moved laterally after the end thereof has been positioned in preparation for internal bore welding to the tube sheet. (auth)

Wolowodiuk, W.; Anelli, J.; Dawson, B.E.

1974-01-01T23:59:59.000Z

49

Segmented instrumentation tube including a locking sleeve for interlocking the segments of the instrumentation tube  

DOE Patents (OSTI)

Segmented instrumentation tube including a locking sleeve for interlocking the segments of the instrumentation tube, so that the threaded ends of the instrumentation tube do not unthread when subjected to vibration, such an instrumentation tube being suitable for use in a nuclear reactor pressure vessel. The instrumentation tube has a first member having a threaded end portion that has a plurality of first holes circumferentially around the outside surface thereof. The instrumentation tube also has a second member having a threaded end portion that has a plurality of second holes circumferentially around the outside surface thereof. The threads of the second member are caused to threadably engage the threads of the first member for defining a threaded joint therebetween. A sleeve having an inside surface surrounds the end portion of the first member and the end portion of the second member and thus surrounds the threaded joint. The sleeve includes a plurality of first projections and second projections that outwardly extend from the inside surface to engage the first holes and the second holes, respectively. The outside surface of the sleeve is crimped or swaged at the locations of the first projections and second projections such that the first projections and the second projections engage their respective holes. In this manner, independent rotation of the first member with respect to the second member is prevented, so that the instrumentation tube will not unthread at its threaded joint.

Obermeyer, Franklin D. (Pensacola, FL)

1993-01-01T23:59:59.000Z

50

Segmented instrumentation tube including a locking sleeve for interlocking the segments of the instrumentation tube  

DOE Patents (OSTI)

Segmented instrumentation tube including a locking sleeve for interlocking the segments of the instrumentation tube, so that the threaded ends of the instrumentation tube do not unthread when subjected to vibration, such an instrumentation tube being suitable for use in a nuclear reactor pressure vessel. The instrumentation tube has a first member having a threaded end portion that has a plurality of first holes circumferentially around the outside surface thereof. The instrumentation tube also has a second member having a threaded end portion that has a plurality of second holes circumferentially around the outside surface thereof. The threads of the second member are caused to threadably engage the threads of the first member for defining a threaded joint there between. A sleeve having an inside surface surrounds the end portion of the first member and the end portion of the second member and thus surrounds the threaded joint. The sleeve includes a plurality of first projections and second projections that outwardly extend from the inside surface to engage the first holes and the second holes, respectively. The outside surface of the sleeve is crimped or swaged at the locations of the first projections and second projections such that the first projections and the second projections engage their respective holes. In this manner, independent rotation of the first member with respect to the second member is prevented, so that the instrumentation tube will not unthread at its threaded joint. 10 figures.

Obermeyer, F.D.

1993-11-16T23:59:59.000Z

51

Anomalous electron trapping by magnetic flux tubes and electric current vortices  

E-Print Network (OSTI)

Anomalous electron trapping by magnetic flux tubes and electric current vortices F. Bentosela, a current vortex in the plane. In this case the flux is zero; there is a pair of bound states for a weak with a nonhomogeneous magnetic field B , and investigate the corresponding Pauli Hamiltonian. We prove a lower bound

52

Stable optical vortex solitons in pair plasmas  

Science Conference Proceedings (OSTI)

It is shown that the pair plasmas with small temperature asymmetry can support existence of localized as well as delocalized optical vortex solitons. Coexistence of such solitons is possible due to peculiar form of saturating nonlinearity which has a focusing-defocusing nature--for weak amplitudes being focusing becoming defocusing for higher amplitudes. It is shown that delocalized vortex soliton is stable in entire region of its existence while single- and multicharged localized vortex solitons are unstable for low amplitudes and become stable for relativistic amplitudes.

Berezhiani, V. I.; Shatashvili, N. L. [Plasma Physics Department, Andronikashvili Institute of Physics, Tbilisi 0177 (Georgia); Department of Physics, Faculty of Exact and Natural Sciences, Javakhishvili Tbilisi State University, Tbilisi 0128 (Georgia); Mahajan, S. M. [Institute for Fusion Studies, University of Texas at Austin, Austin, Texas 78712 (United States)

2010-05-15T23:59:59.000Z

53

Vortex Breakdown in Atmospheric Columnar Vortices  

Science Conference Proceedings (OSTI)

Vortex breakdown occurs in tornadoes and waterspouts. This phenomenon may give information on the state and future behavior of those whirlwinds. Because of the rarity of recorded events, archival sources are consulted for qualitative descriptions ...

H. J. Lugt

1989-12-01T23:59:59.000Z

54

Bubble Behavior in a Taylor Vortex  

E-Print Network (OSTI)

We present an experimental study on the behavior of bubbles captured in a Taylor vortex. The gap between a rotating inner cylinder and a stationary outer cylinder is filled with a Newtonian mineral oil. Beyond a critical ...

Deng, Rensheng

55

Barotropic Vortex Evolution on a Beta Plane  

Science Conference Proceedings (OSTI)

A barotropic, primitive equation (shallow water) model is used on the beta plane to investigate the influence of divergence, total relative angular momentum (RAM) and advective nonlinearities on the evolution of a hurricane-like vortex. The ...

Lloyd J. Shapiro; Katsuyuki V. Ooyama

1990-01-01T23:59:59.000Z

56

Vortex Hydro Energy - National Renewable Energy Laboratory  

Vortex Hydro Energy, LLC Michael M. Bernitsas Ph.D., CEO and CTO Gus Simiao MSE, MBA, Dir. of Business Development NREL’s 20th Annual, Industry Growth Forum

57

Vortex-Driven Sensitivity in Deformation Flow  

Science Conference Proceedings (OSTI)

A sensitivity mechanism for the interaction of two vortices in a two-dimensional deformation background flow is explored. A nonlinear model describing the vortex interaction up to a critical merging distance is developed. This model shows that in ...

Zhiyuan Liu; Paul J. Roebber

2008-12-01T23:59:59.000Z

58

Fundamental Assessment of Steam Generator Line Contact Tube Support Fouling  

Science Conference Proceedings (OSTI)

This report describes the current progress of a project to predict the tendency for fouling and dryout at the line contact point between steam generator tubes and tube support plates. This first phase of the project is focused on evaluating the susceptibility of specific support designs (concave, flat, convex broached lands, and eggcrates) to fouling. This report describes the first modeling task aimed at development of a simple thermal hydraulic model that describes the local mass velocity in the tube s...

2004-05-18T23:59:59.000Z

59

Direct Imaging of Antiferromagnetic Vortex States  

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

Direct Imaging of Antiferromagnetic Vortex States Print Direct Imaging of Antiferromagnetic Vortex States Print Magnetic materials are characterized by the ordering of electron spins, with nearest-neighbor spins parallel to each other in ferromagnetic (FM) materials and antiparallel to each other in antiferromagnetic (AFM) materials. As the size of a magnetic system is reduced to micron scale, it has been shown that the spins in an FM microstructure can curl around to form a magnetic vortex state. While there has been intensive activity in the study of vortex states in FM disks, there has been no direct observation of such states in an AFM microstructure, although theory predicts many interesting and unique properties for the AFM vortex state. Recently, a research team from Berkeley, Korea, and China has taken the first direct image of an AFM vortex in multilayered magnetic disk structures using x-ray magnetic linear dichroism (XMLD) and photoemission electron microscopy (PEEM) at ALS Beamlines 4.0.2 and 11.0.1 , respectively. The experiments observed two types of AFM vortices, one of which has no analogue in FM vortices.

60

Direct Imaging of Antiferromagnetic Vortex States  

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

Direct Imaging of Antiferromagnetic Vortex States Print Direct Imaging of Antiferromagnetic Vortex States Print Magnetic materials are characterized by the ordering of electron spins, with nearest-neighbor spins parallel to each other in ferromagnetic (FM) materials and antiparallel to each other in antiferromagnetic (AFM) materials. As the size of a magnetic system is reduced to micron scale, it has been shown that the spins in an FM microstructure can curl around to form a magnetic vortex state. While there has been intensive activity in the study of vortex states in FM disks, there has been no direct observation of such states in an AFM microstructure, although theory predicts many interesting and unique properties for the AFM vortex state. Recently, a research team from Berkeley, Korea, and China has taken the first direct image of an AFM vortex in multilayered magnetic disk structures using x-ray magnetic linear dichroism (XMLD) and photoemission electron microscopy (PEEM) at ALS Beamlines 4.0.2 and 11.0.1 , respectively. The experiments observed two types of AFM vortices, one of which has no analogue in FM vortices.

Note: This page contains sample records for the topic "vortex tube project" 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

Direct Imaging of Antiferromagnetic Vortex States  

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

Direct Imaging of Antiferromagnetic Vortex States Print Direct Imaging of Antiferromagnetic Vortex States Print Magnetic materials are characterized by the ordering of electron spins, with nearest-neighbor spins parallel to each other in ferromagnetic (FM) materials and antiparallel to each other in antiferromagnetic (AFM) materials. As the size of a magnetic system is reduced to micron scale, it has been shown that the spins in an FM microstructure can curl around to form a magnetic vortex state. While there has been intensive activity in the study of vortex states in FM disks, there has been no direct observation of such states in an AFM microstructure, although theory predicts many interesting and unique properties for the AFM vortex state. Recently, a research team from Berkeley, Korea, and China has taken the first direct image of an AFM vortex in multilayered magnetic disk structures using x-ray magnetic linear dichroism (XMLD) and photoemission electron microscopy (PEEM) at ALS Beamlines 4.0.2 and 11.0.1 , respectively. The experiments observed two types of AFM vortices, one of which has no analogue in FM vortices.

62

Low NOx Advanced Vortex Combustor  

SciTech Connect

A lean-premixed advanced vortex combustor (AVC) has been developed and tested. The natural gas fueled AVC was tested at the U.S. Department of Energy’s National Energy Technology Laboratory in Morgantown, WV. All testing was performed at elevated pressures and inlet temperatures and at lean fuel-air ratios representative of industrial gas turbines. The improved AVC design exhibited simultaneous NOx /CO/unburned hydrocarbon (UHC) emissions of 4/4/0 ppmv (all emissions corrected to 15% O2 dry). The design also achieved less than 3 ppmv NOx with combustion efficiencies in excess of 99.5%. The design demonstrated marked acoustic dynamic stability over a wide range of operating conditions, which potentially makes this approach significantly more attractive than other lean-premixed combustion approaches. In addition, the measured 1.75% pressure drop is significantly lower than conventional gas turbine combustors, which could translate into an overall gas turbine cycle efficiency improvement. The relatively high velocities and low pressure drop achievable with this technology make the AVC approach an attractive alternative for syngas fuel applications.

Edmonds, R.G. (Ramgen Power Systems, Inc., Bellevue, WA); Williams, J.T. (Ramgen Power Systems, Inc., Bellevue, WA); Steele, R.C. (EPRI); Straub, D.L.; Casleton, K.H.; Bining, Avtar (California Energy Commission, Sacramento, CA)

2008-05-01T23:59:59.000Z

63

Effects of Combustion-Induced Vortex Breakdown on Flashback Limits of Syngas-Fueled Gas Turbine Combustors  

DOE Green Energy (OSTI)

Turbine combustors of advanced power systems have goals to achieve very low pollutants emissions, fuel variability, and fuel flexibility. Future generation gas turbine combustors should tolerate fuel compositions ranging from natural gas to a broad range of syngas without sacrificing operational advantages and low emission characteristics. Additionally, current designs of advanced turbine combustors use various degrees of swirl and lean premixing for stabilizing flames and controlling high temperature NOx formation zones. However, issues of fuel variability and NOx control through premixing also bring a number of concerns, especially combustor flashback and flame blowout. Flashback is a combustion condition at which the flame propagates upstream against the gas stream into the burner tube. Flashback is a critical issue for premixed combustor designs, because it not only causes serious hardware damages but also increases pollutant emissions. In swirl stabilized lean premixed turbine combustors onset of flashback may occur due to (i) boundary layer flame propagation (critical velocity gradient), (ii) turbulent flame propagation in core flow, (iii) combustion instabilities, and (iv) upstream flame propagation induced by combustion induced vortex breakdown (CIVB). Flashback due to first two foregoing mechanisms is a topic of classical interest and has been studied extensively. Generally, analytical theories and experimental determinations of laminar and turbulent burning velocities model these mechanisms with sufficient precision for design usages. However, the swirling flow complicates the flashback processes in premixed combustions and the first two mechanisms inadequately describe the flashback propensity of most practical combustor designs. The presence of hydrogen in syngas significantly increases the potential for flashback. Due to high laminar burning velocity and low lean flammability limit, hydrogen tends to shift the combustor operating conditions towards flashback regime. Even a small amount of hydrogen in a fuel blend triggers the onset of flashback by altering the kinetics and thermophysical characteristics of the mixture. Additionally, the presence of hydrogen in the fuel mixture modifies the response of the flame to the global effects of stretch and preferential diffusion. Despite its immense importance in fuel flexible combustor design, little is known about the magnitude of fuel effects on CIVB induced flashback mechanism. Hence, this project investigates the effects of syngas compositions on flashback resulting from combustion induced vortex breakdown. The project uses controlled experiments and parametric modeling to understand the velocity field and flame interaction leading to CIVB driven flashback.

Ahsan Choudhuri

2011-03-31T23:59:59.000Z

64

Anodization of process tubes  

SciTech Connect

This report discusses the presence of corrosion products upon aluminum process tubes removed from wet portions of F Pile which led to the suspicion that the tubes might be corroding at an accelerated rate because of water entrapped in the channels between the tubes and the graphite blocks. Corrosion was especially noted on those tubes that were tightly stuck within the blocks. Analysis of the corrosion products showed that the major constituent was a hydrated aluminum oxide, containing iron oxide, calcium carbonate, and other substances in lower concentrations. This led to placement of an order for the anodizing of 200 process tubes.

Pitzer, E.C.

1952-09-17T23:59:59.000Z

65

Nonlinear Motion of a Shallow Water Barotropic Vortex  

Science Conference Proceedings (OSTI)

Nonlinear motions of a shallow water barotropic vortex on a ? plane differ substantially from the analogous linear motions. The nonlinear model described here, in which wavenumber 1–3 asymmetries interact with each other and the mean vortex, ...

H. E. Willoughby

1994-12-01T23:59:59.000Z

66

Interactions between a Submesoscale Anticyclonic Vortex and a Front  

Science Conference Proceedings (OSTI)

The evolution of a submesoscale anticyclonic vortex was observed by high-frequency Doppler radio current meters and satellite radiometers. The vortex formed between two large cyclones to the southwest of Oahu, Hawaii. The radius of the core was ...

Cédric Chavanne; Pierre Flament; Klaus-Werner Gurgel

2010-08-01T23:59:59.000Z

67

A Highly Configurable Vortex Initialization Method for Tropical Cyclones  

Science Conference Proceedings (OSTI)

A highly configurable vortex initialization methodology has been constructed in order to permit manipulation of the initial vortex structure in numerical models of tropical cyclones. By using distinct specifications of the flow in the boundary ...

Eric D. Rappin; David S. Nolan; Sharanya J. Majumdar

68

Case Study of an Orographically Induced Mesoscale Vortex (Denver Cyclone)  

Science Conference Proceedings (OSTI)

Observations taken during the Convection Initiation and Downburst Experiment (CINDE) are used to describe the formation and structure of an orographically induced mesoscale vortex that frequently occurs in northeastern Colorado. This vortex, ...

J. M. Wilczak; T. W. Christian

1990-05-01T23:59:59.000Z

69

A Highly Configurable Vortex Initialization Method for Tropical Cyclones  

Science Conference Proceedings (OSTI)

A highly configurable vortex initialization methodology has been constructed in order to permit manipulation of the initial vortex structure in numerical models of tropical cyclones. By using distinct specifications of the flow in the boundary ...

Eric D. Rappin; David S. Nolan; Sharanya J. Majumdar

2013-10-01T23:59:59.000Z

70

Stabilization of vortex solitons in nonlocal nonlinear media  

SciTech Connect

We study the evolution of vortex solitons in optical media with a nonlocal nonlinear response. We employ a modulation theory for the vortex parameters based on an averaged Lagrangian, and analyze the azimuthal evolution of both the vortex width and diffractive radiation. We describe analytically the physical mechanism for vortex stabilization due to the long-range nonlocal nonlinear response, the effect observed earlier in numerical simulations only.

Minzoni, Antonmaria A. [Fenomenos Nonlineales y Mecanica (FENOMEC), Department of Mathematics and Mechanics, Instituto de Investigacion en Matematicas Aplicadas y Sistemas, Universidad Nacional Autonoma de Mexico, 01000 Mexico D.F. (Mexico); Smyth, Noel F. [School of Mathematics and Maxwell Institute for Mathematical Sciences, University of Edinburgh, Edinburgh EH9 3JZ, Scotland (United Kingdom); Worthy, Annette L. [School of Mathematics and Applied Statistics, University of Wollongong, Wollongong NSW 2522 (Australia); Kivshar, Yuri S. [Nonlinear Physics Center, Research School of Physical Sciences and Engineering, Australian National University, Canberra ACT 0200 (Australia)

2007-12-15T23:59:59.000Z

71

A Study of Premixed Propagating Flame Vortex Interaction  

Science Conference Proceedings (OSTI)

Experimental data is presented for the interaction between a propagating flame and a simple vortex flow field structure generated in the wake of solid obstacles. The interaction between gas movement and obstacles creates vortex shedding forming a simple ... Keywords: Combustion, Flame/Vortex, PIV, Visualization

G. K. Hargrave; S. Jarvis

2006-04-01T23:59:59.000Z

72

Heat transfer augmentation along the tube wall of a louvered fin heat exchanger using practical delta winglets  

E-Print Network (OSTI)

Heat transfer augmentation along the tube wall of a louvered fin heat exchanger using practical surface of louvered fin heat exchangers. It is shown that delta winglets placed on louvered fins produce Elsevier Ltd. All rights reserved. Keywords: Compact heat exchanger; Vortex generator; Louvered fins 1

Thole, Karen A.

73

Steam Generator Management Program: Experimental Studies of Flow Around Foreign Objects in a Tube Array  

Science Conference Proceedings (OSTI)

Tube wear caused by foreign objects (FOs) in steam generators can lead to unplanned and costly forced outages. The complex flow field within the tube bundle, coupled with the wide range of FO sizes and possible configurations relative to the tubes, poses a challenge to the understanding of the fundamental mechanisms of FO-tube interaction and prediction of the resulting tube wear.The goals of the project were (1) to develop an experimental apparatus and measurement system capable of ...

2013-12-18T23:59:59.000Z

74

Conduction cooled tube supports  

DOE Patents (OSTI)

In boilers, process tubes are suspended by means of support studs that are in thermal contact with and attached to the metal roof casing of the boiler and the upper bend portions of the process tubes. The support studs are sufficiently short that when the boiler is in use, the support studs are cooled by conduction of heat to the process tubes and the roof casing thereby maintaining the temperature of the stud so that it does not exceed 1400.degree. F.

Worley, Arthur C. (Mt. Tabor, NJ); Becht, IV, Charles (Morristown, NJ)

1984-01-01T23:59:59.000Z

75

Coiled Tubing Safety Manual  

SciTech Connect

This document addresses safety concerns regarding the use of coiled tubing as it pertains to the preservation of personnel, environment and the wellbore.

Crow, W.

1999-04-06T23:59:59.000Z

76

Wound tube heat exchanger  

DOE Patents (OSTI)

What is disclosed is a wound tube heat exchanger in which a plurality of tubes having flattened areas are held contiguous adjacent flattened areas of tubes by a plurality of windings to give a double walled heat exchanger. The plurality of windings serve as a plurality of effective force vectors holding the conduits contiguous heat conducting walls of another conduit and result in highly efficient heat transfer. The resulting heat exchange bundle is economical and can be coiled into the desired shape. Also disclosed are specific embodiments such as the one in which the tubes are expanded against their windings after being coiled to insure highly efficient heat transfer.

Ecker, Amir L. (Duncanville, TX)

1983-01-01T23:59:59.000Z

77

Photomultiplier tube saturation indicator  

DOE Patents (OSTI)

A photomultiplier tube saturation indicator is formed by supplying a supplemental light source, typically a light emitting diode (LED), adjacent to the photomultiplier tube. A switch allows the light source to be activated. The light is forwarded to the photomultiplier tube by an optical fiber. If the probe is properly light tight, then a meter attached to the indicator will register the light from the LED. If the probe is no longer light tight, and the saturation indicator is saturated, no signal will be registered when the LED is activated. This photomultiplier tube is used with alpha contamination probes.

Ruch, J.F.; Urban, D.J.

1995-12-31T23:59:59.000Z

78

Coiled tubing drilling requires economic and technical analyses  

Science Conference Proceedings (OSTI)

Field experience has proven that coiled tubing drilling is a technical and economic option on some wells; however, coiled tubing drilling is not the solution to every drilling prospect or production-enhancement job. To determine if coiled tubing drilling is viable, the geographic, technical, and economic aspects of each project must be considered in detail. Generally, with some limitations, coiled tubing drilling is feasible primarily when jointed pipe cannot be used effectively. Also, coiled tubing drilling may be more appropriate because of some special well site requirements, such as environmental regulations requiring less surface disturbance. The paper discusses technical considerations which need to be considered, economic feasibility, limitations of well types (new shallow wells, conventional reentry, through-tubing reentry, and underbalanced drilling), and outlook for further growth in the coiled tubing drilling industry.

Gary, S.C. (Schlumberger Dowell, Sugar Land, TX (United States))

1995-02-20T23:59:59.000Z

79

Entanglement of a Quantum Optical Elliptic Vortex  

E-Print Network (OSTI)

We calculate the entanglement of a generalized elliptical vortex formed by quantized radiation field, using Wigner quasiprobability distribution function for such states. We find a critical squeezing parameter above which the entanglement is less for higher vorticity, which is counter intuitive.

Abir Bandyopadhyay; Shashi Prabhakar; Ravindra Pratap Singh

2010-10-19T23:59:59.000Z

80

Entanglement of Quantum Optical Elliptic Vortex  

E-Print Network (OSTI)

We calculate the entanglement of a generalized elliptical vortex formed by quantized radiation field, using Wigner quasiprobability distribution function for such states. We find a critical squeezing parameter above which the entanglement is less for higher vorticity, which is counter intuitive.

Bandyopadhyay, Abir; Singh, Ravindra Pratap

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "vortex tube project" 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

The Tornadic Vortex Signature: An Update  

Science Conference Proceedings (OSTI)

A tornadic vortex signature (TVS) is a degraded Doppler velocity signature of a tornado that occurs when the core region of a tornado is smaller than the half-power beamwidth of the sampling Doppler radar. Soon after the TVS was discovered in the ...

Rodger A. Brown; Vincent T. Wood

2012-04-01T23:59:59.000Z

82

Vortex operators in gauge field theories  

SciTech Connect

Several related aspects of the 't Hooft vortex operator are studied. The current picture of the vacuum of quantum chromodynamics, the idea of dual field theories, and the idea of the vortex operator are reviewed first. The Abelian vortex operator written in terms of elementary fields and the calculation of its Green's functions are considered. A two-dimensional solvable model of a Dirac string is presented. The expression of the Green's functions more neatly in terms of Wu and Yang's geometrical idea of sections is addressed. The renormalization of the Green's functions of two kinds of Abelian looplike operators, the Wilson loop and the vortex operator, is studied; for both operators only an overall multiplicative renormalization is needed. In the case of the vortex this involves a surprising cancellation. Next, the dependence of the Green's functions of the Wilson and 't Hooft operators on the nature of the vacuum is discussed. The cluster properties of the Green's functions are emphasized. It is seen that the vortex operator in a massive Abelian theory always has surface-like clustering. The form of Green's functions in terms of Feynman graphs is the same in Higgs and symmetric phases; the difference appears in the sum over all tadpole trees. Finally, systems having fields in the fundamental representation are considered. When these fields enter only weakly into the dynamics, a vortex-like operator is anticipated. Any such operator can no longer be local looplike, but must have commutators at long range. A U(1) lattice gauge theory with two matter fields, one singly charged (fundamental) and one doubly charged (adjoint), is examined. When the fundamental field is weakly coupled, the expected phase transitions are found. When it is strongly coupled, the operator still appears to be a good order parameter, a discontinuous change in its behavior leads to a new phase transition. 18 figures.

Polchinski, J.

1980-07-01T23:59:59.000Z

83

Steam generator tube failures  

SciTech Connect

A review and summary of the available information on steam generator tubing failures and the impact of these failures on plant safety is presented. The following topics are covered: pressurized water reactor (PWR), Canadian deuterium uranium (CANDU) reactor, and Russian water moderated, water cooled energy reactor (VVER) steam generator degradation, PWR steam generator tube ruptures, the thermal-hydraulic response of a PWR plant with a faulted steam generator, the risk significance of steam generator tube rupture accidents, tubing inspection requirements and fitness-for-service criteria in various countries, and defect detection reliability and sizing accuracy. A significant number of steam generator tubes are defective and are removed from service or repaired each year. This wide spread damage has been caused by many diverse degradation mechanisms, some of which are difficult to detect and predict. In addition, spontaneous tube ruptures have occurred at the rate of about one every 2 years over the last 20 years, and incipient tube ruptures (tube failures usually identified with leak detection monitors just before rupture) have been occurring at the rate of about one per year. These ruptures have caused complex plant transients which have not always been easy for the reactor operators to control. Our analysis shows that if more than 15 tubes rupture during a main steam line break, the system response could lead to core melting. Although spontaneous and induced steam generator tube ruptures are small contributors to the total core damage frequency calculated in probabilistic risk assessments, they are risk significant because the radionuclides are likely to bypass the reactor containment building. The frequency of steam generator tube ruptures can be significantly reduced through appropriate and timely inspections and repairs or removal from service.

MacDonald, P.E.; Shah, V.N.; Ward, L.W.; Ellison, P.G.

1996-04-01T23:59:59.000Z

84

The dependence of chemistry on the inlet equivalence ratio in vortex-flame interactions [Printed LBNL report with title: The effect of stoichiometry on vortex flame interactions  

E-Print Network (OSTI)

of stoichiometry on vortex flame interactions [31] Pember,Rosalik, M . E . , Combust. Flame, 112(3):342-358 (1998).of stoichiometry on vortex flame interactions [15] Mueller,

Tonse, Shaheen R.

2011-01-01T23:59:59.000Z

85

The dependence of chemistry on the inlet equivalence ratio in vortex-flame interactions [Printed LBNL report with title: The effect of stoichiometry on vortex flame interactions  

E-Print Network (OSTI)

of stoichiometry on vortex flame interactions [31] Pember,Rosalik, M . E . , Combust. Flame, 112(3):342-358 (1998).of stoichiometry on vortex flame interactions [15] Mueller,

Bell, John B.; Brown, Nancy J.; Day, Marcus S.; Frenklach, Michael; Grcar, Joseph F.; Tonse, Shaheen R.

1999-01-01T23:59:59.000Z

86

Underbalanced coiled tubing sidetrack successful  

Science Conference Proceedings (OSTI)

The technique of drilling through a completion string, underbalanced, with coiled tubing eliminated some of the problems encountered with overbalanced drilling in a group of offset wells. This project confirmed that performing drilling operations in live wells can be carried out safely and effectively. Dalen is a sour gas field in the eastern part of The Netherlands and produces from vertical fractures in the Zechstein carbonate reservoir. The proposal for Dalen 2 was to abandon the lower section of the original hole and subsequently sidetrack conventionally to the top of the reservoir, run and cement a 5-in. liner, complete the well with a 5-in. monobore completion, and install the christmas tree. This part of the operation would be performed with a workover hoist. Thereafter, a 3 3/4-in. hole would be drilled through the completion and into the reservoir, underbalanced with coiled tubing. The drilling proposal had to address a number of key issues: creating underbalanced conditions; handling sour gas production at surface; handling and treating drilling fluids at surface; removing drilled solids from the returned fluid system; and deploying a long coiled tubing drilling bottom hole assembly (BHA) into a live well. The paper discusses planning, legislative issues, well preparation, the drilling program, and lessons learned.

Adam, J.; Berry, M. [Nederlandse Aardolie Maatschappij B.V., Assen (Netherlands)

1995-12-18T23:59:59.000Z

87

Persistence of Metastable Vortex Lattice Domains in MgB2 in the Presence of Vortex Motion  

Science Conference Proceedings (OSTI)

Recently, extensive vortex lattice metastability was reported in MgB2 in connection with a second-order rotational phase transition. However, the mechanism responsible for these well-ordered metastable vortex lattice phases is not well understood. Using small-angle neutron scattering, we studied the vortex lattice in MgB2 as it was driven from a metastable to the ground state through a series of small changes in the applied magnetic field. Our results show that metastable vortex lattice domains persist in the presence of substantial vortex motion and directly demonstrate that the metastability is not due to vortex pinning. Instead, we propose that it is due to the jamming of counterrotated vortex lattice domains which prevents a rotation to the ground state orientation.

Rastovski, Catherine [University of Notre Dame, IN; Schlesinger, Kimberly [University of Notre Dame, IN; Gannon, William J [Northwestern University, Evanston; Dewhurst, Charles [Institut Laue-Langevin (ILL); Debeer-Schmitt, Lisa M [ORNL; Zhigadlo, Nikolai [ETH Zurich, Switzerland; Karpinski, Janusz [ETH Zurich, Switzerland; Eskildsen, Morten [University of Notre Dame, IN

2013-01-01T23:59:59.000Z

88

A Vortex Contactor for Carbon Dioxide Separations  

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

Vortex Contactor for Carbon Dioxide Separations Vortex Contactor for Carbon Dioxide Separations Kevin T. Raterman (ratekt@inel.gov; 208-526-5444) Michael McKellar (mgq@inel.gov; 208-526-1346) Anna Podgorney (poloak@inel.gov; 208-526-0064) Douglas Stacey (stacde@inel.gov; 208-526-3938) Terry Turner (tdt@inel.gov; 208-526-8623) Idaho National Engineering and Environmental Laboratory P.O. Box 1625 Idaho Falls, Idaho 83415-2110 Brian Stokes (bxs9@pge.com; 415-972-5591) John Vranicar (jjv2@pge.com; 415-972-5591) Pacific Gas & Electric Company 123 Mission Street San Francisco, CA 94105 Introduction Many analysts 1,2,3 identify carbon dioxide (CO 2 ) capture and separation as a major roadblock in efforts to cost effectively mitigate greenhouse gas emissions via sequestration. An assessment 4 conducted by the International Energy Agency (IEA)

89

Vortex Dynamics in NanoScale Materials  

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

Into the Vortex: Dynamics in Nanoscale Materials Into the Vortex: Dynamics in Nanoscale Materials Micron and nanosized magnets are of great interest for their potential applications in new electronic devices, such as magnetic random access memories. As the size of magnets is reduced to a 1-micron scale and below, the boundaries (surfaces, perimeters, etc) of the objects begin to profoundly influence both the static and dynamic behavior of the materials. Researchers from Argonne's Materials Science Division (MSD), Center for Nanoscale Materials (CNM), and Advanced Photon Source (APS) have recently examined the dynamics of 3- to 7-micron-diameter NiFe alloy disks with a combination of theoretical calculations and a new time-resolved magnetic imaging technique using synchrotron-based x-ray photoemission electron

90

Boiler Stack Economizer Tube Failure  

Science Conference Proceedings (OSTI)

Presentation Title, Boiler Stack Economizer Tube Failure ... performed to investigate the failure of a type 304 stainless steel tube from a boiler stack economizer.

91

Vortex formation during rf heating of plasma  

SciTech Connect

Experiments on a test plasma show that the linear theory of waveguide coupling to slow plasma waves begins to break down if the rf power flux exceeds approx. 30 W/cm/sup 2/. Probe measurements reveal that within 30 ..mu..s an undulation appears in the surface plasma near the mouth of the twin waveguide. This surface readjustment is part of a vortex, or off-center convective cell, driven by asymmetric rf heating of the plasma column.

Motley, R.W.

1980-05-01T23:59:59.000Z

92

Vortex flow visualization using tetrahedral cell subdivision  

Science Conference Proceedings (OSTI)

Proposes an effective technique for searching for critical points, which are points at which the velocity vector is zero. The previous method, using tetrahedral-cell subdivision, often generates multiple critical points in a hexahedral cell, and this ... Keywords: Newton's method, critical point searching technique, hexahedral cell, linear interpolation function, multiple critical points, numerical integration scheme, precise position calculation, tetrahedral cell subdivision, trilinear interpolation function, velocity vector, vortex flow visualization, vortices

A. Doi; S. Suzuki; K. Koyamada; S. Sannakanishi

1997-10-01T23:59:59.000Z

93

QCD String as Vortex String in Seiberg-Dual Theory  

E-Print Network (OSTI)

We construct a classical vortex string solution in a Seiberg-dual theory of N=1 supersymmetric SO(N_c) QCD which flows to a confining phase. We claim that this vortex string is a QCD string, as previouly argued by M.Strassler. In SO(N_c) QCD, it is known that stable QCD strings exist even in the presence of dynamical quarks. We show that our vortex strings are stable in the Seiberg-dual theory.

Eto, Minoru; Terashima, Seiji

2007-01-01T23:59:59.000Z

94

YouTube  

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

Note: Since the YouTube platform is always evolving, so are our best practices for using it. We welcome feedback and suggestions to keep processes current and up-to-date. For more information, read...

95

Profilometer for tubes  

DOE Patents (OSTI)

An apparatus for inspecting interior surfaces of tubes or pipes. A spring-loaded sensor pin, slidably mounted in a rotatable housing is displaced in the housing as the housing is rotated. A centering means maintains spacing of the housing with respect to the tube wall. Displacement of the sensor pin in the housing are converted to measurable electrical signals by a linearly variable differential transformer.

Livingston, R.A.

1986-08-22T23:59:59.000Z

96

Spontaneous Symmetry-Breaking and the Vortex Lattice ...  

Science Conference Proceedings (OSTI)

... The magnetic vortex lattice of Type-II superconductors, as a quasi ... morphology in single-crystals of pure niobium, a 'conventional' superconductor. ...

97

Knot energy in unstretching ergodic magnetic flux tubes  

E-Print Network (OSTI)

Recently Titov et al [ApJ \\textbf{693},(2009) and ApJ (2007)] have made use of a covariant model to investigate magnetic reconnection of astrophysical plasmas. Earlier R Ricca [Phys Rev A (1991)] has used another covariant formalism, to investigated vortex filaments and solitons. This formalism, called Ricci rotation coefficients (RRC), is applied here, to the Chui and Moffatt [PRSA (1995)] knotted magnetic flux tube (MFT) Riemann metric in the case of vanishing stretch. It is shown that, the vanishing of some components of the (RRC) leads to unstretching knotted tubes. Computing of magnetic knot energy in terms of the RCC, shows that, uniform, unstretching and constant cross-section tubes leads to a marginal dynamo action over magnetic surfaces. Recent investigation on the role of stretching in plasma dynamo action showed that in diffusive media [Phys Plasma \\textbf{14} (2008)], unstretching unknotted tubes would not support fast dynamo action. This result was generalized here to much more general knotted MF...

de Andrade, Garcia

2009-01-01T23:59:59.000Z

98

President Roosevelt Establishes Manhattan Project | National...  

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

to the main content Facebook Flickr RSS Twitter YouTube President Roosevelt Establishes Manhattan Project | National Nuclear Security Administration Our Mission Managing the...

99

DEVELOPMENT OF ODS HEAT EXCHANGER TUBING  

SciTech Connect

Due to extenuating circumstances Special Metals Corporation is terminating their role as prime contractor with this Vision 21 project. In response to this situation, a status report for the project as of this date, has been prepared and follows. Significant work has been accomplished on three major tasks of this project--increasing the circumferential strength of MA956 tubing, joining of the MA956 alloy, and determination of the high temperature corrosion limits of the MA956 alloy. With respect to increasing the circumferential strength of a MA956 tube, the first rod extrusion campaign has been completed with microstructure analysis providing valuable information on the strengthening mechanism of this alloy. Also, based on the results obtained thus far extrusions of tubes are in process and creep testing to determine the ''stress threshold'' curves for this alloy continues. Regarding joining of the MA956 alloy, welds have been produced using the friction, explosive, magnetic impulse, and diffusion bonding techniques. Complete elevated temperature mechanical testing has not been conducted on joints produced using these methods, however room temperature tensile and shear testing has shown promising results on friction and explosive welds. And finally, laboratory high temperature corrosion testing of the material continues in both fluid-side and fire-side simulated environments. Brief summary status statements from each of the subcontractors is appended to this report which additionally contains the expected funding needed to complete the project.

Mark A. Harper, Ph.D.

2003-04-01T23:59:59.000Z

100

Mitigation of Boiler Tubing Damage from Use of Explosive Cleaning Methods  

Science Conference Proceedings (OSTI)

Combustion of fossil fuels results in formation of slags that cover boiler tubes. Efficient boiler operation requires periodic removal of these slags, and explosive cleaning is an excellent cleaning method. While boiler tube cleaning using explosives is an established technology, a number of cases of tube damage have been reported, including cracking and denting of boiler tubes. This report details the work accomplished in Phase I of this project to capture the current understanding and practice of explo...

2008-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "vortex tube project" 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

Stress-Assisted Corrosion in Boiler Tubes  

Science Conference Proceedings (OSTI)

A number of industrial boilers, including in the pulp and paper industry, needed to replace their lower furnace tubes or decommission many recovery boilers due to stress-assisted corrosion (SAC) on the waterside of boiler tubes. More than half of the power and recovery boilers that have been inspected reveal SAC damage, which portends significant energy and economic impacts. The goal of this project was to clarify the mechanism of stress-assisted corrosion (SAC) of boiler tubes for the purpose of determining key parameters in its mitigation and control. To accomplish this in-situ strain measurements on boiler tubes were made. Boiler water environment was simulated in the laboratory and effects of water chemistry on SAC initiation and growth were evaluated in terms of industrial operations. Results from this project have shown that the dissolved oxygen is single most important factor in SAC initiation on carbon steel samples. Control of dissolved oxygen can be used to mitigate SAC in industrial boilers. Results have also shown that sharp corrosion fatigue and bulbous SAC cracks have similar mechanism but the morphology is different due to availability of oxygen during boiler shutdown conditions. Results are described in the final technical report.

Preet M Singh; Steven J Pawel

2006-05-27T23:59:59.000Z

102

Magnetic Vortex Core Reversal by Low-Field Excitations  

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

Magnetic Vortex Core Reversal by Magnetic Vortex Core Reversal by Low-Field Excitations Magnetic Vortex Core Reversal by Low-Field Excitations Print Wednesday, 28 March 2007 00:00 In micrometer-sized magnetic thin films, the magnetization typically adopts an in-plane, circular configuration known as a magnetic vortex. At the vortex core, the magnetization turns sharply out of the plane, pointing either up or down. Magnetic data storage based on this binary phenomenon is an intriguing concept, but it would require the ability to flip the vortex cores on demand. Because these structures are highly stable, very strong magnetic fields of around half a tesla (approximately one-third the field of the strongest permanent magnet) were previously thought to be necessary to accomplish this. At the ALS, a team of researchers from Germany, Belgium, and the U.S. has used time-resolved scanning transmission x-ray microscopy (STXM) to observe vortex motion and demonstrate the feasibility of using weak magnetic fields as low as 1.5 millitesla (mT) to reverse the direction of a vortex core. The observed switching mechanism, which can be understood within the framework of micromagnetic theory, gives insights into basic magnetization dynamics and their possible application to data storage technologies.

103

Structure of quantum vortex tangle in He-4 counterflow turbulence  

E-Print Network (OSTI)

The main goal of this paper is to present a comprehensive characterization of well developed vortex tangles in a turbulent counterflow in quantum fluids (with a laminar normal fluid component). We analyze extensive numerical simulations using the vortex filament method, solving the full Biot-Savart equations for the vortex dynamics in a wide range of temperatures and counter-flow velocities. In addition to a detailed analysis of traditional characteristics such as vortex line density, anisotropic and curvature parameters of the vortex tangle, we stress other dynamical and statistical characteristics which are either much less studied or even unstudied. The latter include reconnection rates, mean mutual friction forces, drift velocities and the probability distribution functions of various tangle parameters: the loop length, the line curvature, the mean curvature of loops with a given length, etc. During these studies we compare the three main reconnection procedures which are widely used in the literature, and identify which properties are strongly affected by the choice of the reconnection criteria and which of them are practically insensitive to the reconnection procedure. The conclusion is that the vortex filament method in the framework of the Biot-Savart equation sufficiently robust and well suited for the description of the steady state vortex tangle in a quantum counterflow. The Local-Induction Approximation to this equation may be successfully used to analytically establish relationships between mean characteristics of the stochastic vortex tangle.

Luiza Kondaurova; Victor L'vov; Anna Pomyalov; Itamar Procaccia

2013-06-26T23:59:59.000Z

104

Helicoidal vortex model for wind turbine aeroelastic simulation  

Science Conference Proceedings (OSTI)

The vortex method has been extended to account for blade flexibility, which is a potential source of unsteadiness in the flow past a wind turbine rotor. The code has been validated previously under the assumption of rigid blades. The aerodynamics method ... Keywords: Blade flexibility, Steady and unsteady flows, Tower interference, Vortex model

Jean-Jacques Chattot

2007-06-01T23:59:59.000Z

105

An Investigation of a Three-Dimensional Asymmetric Vortex  

Science Conference Proceedings (OSTI)

A three-dimensional numerical simulation is presented for the asymmetric vortex motion which occurs in a Ward-type vortex chamber. The initial state is taken to be one of axisymmetric irrotational flow where the flow enters through the sides at ...

Richard Rotunno

1984-01-01T23:59:59.000Z

106

Gravity waves from vortex dipoles and jets  

E-Print Network (OSTI)

The dissertation first investigates gravity wave generation and propagation from jets within idealized vortex dipoles using a nonhydrostatic mesoscale model. Several initially balanced and localized jets induced by vortex dipoles are examined here. Within these dipoles, inertia-gravity waves with intrinsic frequencies 1-2 times the Coriolis parameter are simulated in the jet exit region. The ray tracing analysis reveals strong variation of wave characteristics along ray paths. The dependence of wave amplitude on the Rossby number is examined through experiments in which the two vortices are initially separated by a large distance but subsequently approach each other and form a vortex dipole with an associated amplifying localized jet. The amplitude of stationary gravity waves in the simulations with a 90-km grid spacing increases nearly linearly with the square of the Rossby number but significantly more rapidly when smaller grid spacing is used. To further address the source mechanism of the gravity waves within the vortex dipole, a linear numerical framework is developed based on the framework proposed by Plougonven and Zhang (2007). Using the nonlinearly balanced fields as the basic state and driven by three types of large scale forcing, the vorticity, divergence and thermodynamic forcing, this linear model is utilized to obtain linear wave responses. The wave packets in the linear responses compare reasonably well with the MM5 simulated gravity waves. It is suggested that the vorticity forcing is the leading contribution to both gravity waves in the jet exit region and the ascent/descent feature in the jet core. This linear model is also adopted to study inertia-gravity waves in the vicinity of a baroclinic jet during the life cycle of an idealized baroclinic wave. It is found that the thermodynamic forcing and the vorticity forcing are equally important to the gravity waves in the low stratosphere, but the divergence forcing is again playing a lesser role. Two groups of wave packets are present in the linear responses; their sources appear to locate either near the surface front or near the middle/upper tropospheric jet.

Wang, Shuguang

2008-08-01T23:59:59.000Z

107

Shock Tube Design  

E-Print Network (OSTI)

Shock accelerated flows exhibit some of the most violent and complex mechanisms in nature by which two separate fluids can be mixed. The Richtmyer-Meshkov instability (RMI) is generated when a perturbed interface between two fluids is impulsively accelerated by a shock wave. In order to further study the phenomenon of the RMI, a new shock tube will be designed. This shock tube will have the capability to change the angle of inclination, allowing for a diverse possibility of fluid interfaces, and provide two driver sections to allow for dual shock capability. The tube was designed to accommodate a 2.5 MACH shockwave, and incorporated a factor of safety of 3 in the design. A modular approach to design was followed to allow further diversification of the shock tube by changing the configuration of the modules. A circular driver section was used to maximize volume and a square driven section was used to minimize affects from the boundary layer. A slide rail mechanism was devised for changing the diaphragms which allows a single person to change the diaphragm in a timely manner. The entire tube is supported on an I-beam to maintain the rigidity of the system while inclined. To accommodate a variable inclination, a hybrid winch support system was designed. A winch changes the angle of the tube and a telescoping support system maintains the position during experimentation. It was determined after running COSMOS finite element stress analysis, that with the 2.5 MPa internal pressure associated with a 2.5 MACH shock wave, a 19.05 mm sidewall thickness was needed to provide a factor of safety of 3.

Koppenberger, Peter K.

2010-05-01T23:59:59.000Z

108

Stability of an optical vortex in a circular nematic cell  

SciTech Connect

The stability of an optical vortex in a cell with a circular cross section containing a nematic liquid crystal is studied. A modulation theory based on an averaged Lagrangian formulation is developed to study this stability. It is found that the vortex is stable unless the radius of the cell is very small, nearly the width of the vortex itself. Based on the analysis of a stationary vortex, the stability of a low-amplitude vortex in a large cell under the influence of its orbital angular momentum and the repelling effect of the cell boundary are studied. The predictions of this modulation theory are found to be in excellent agreement with numerical simulations.

Minzoni, Antonmaria A. [Fenomenos Nonlineales y Mecanica (FENOMEC), Departamento de Matematicas y Mecanica, Instituto de Investigacion en Matematicas Aplicadas y Sistemas, Universidad Nacional Autonoma de Mexico, 01000 Mexico D.F. (Mexico); Smyth, Noel F. [School of Mathematics and Maxwell Institute for Mathematical Sciences, University of Edinburgh, Edinburgh EH9 3JZ, Scotland (United Kingdom); Xu Zhiyong [Nonlinear Physics Center, Research School of Physics and Engineering, Australian National University, Canberra ACT 0200 (Australia)

2010-03-15T23:59:59.000Z

109

CX-005663: Categorical Exclusion Determination | Department of...  

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

Determination CX-005663: Categorical Exclusion Determination Vortex Tube Project Decommissioning Project CX(s) Applied: B3.6 Date: 04292011 Location(s): Morgantown, West...

110

Magnetic Vortex Core Reversal by Low-Field Excitations  

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

Magnetic Vortex Core Reversal by Low-Field Excitations Print Magnetic Vortex Core Reversal by Low-Field Excitations Print In micrometer-sized magnetic thin films, the magnetization typically adopts an in-plane, circular configuration known as a magnetic vortex. At the vortex core, the magnetization turns sharply out of the plane, pointing either up or down. Magnetic data storage based on this binary phenomenon is an intriguing concept, but it would require the ability to flip the vortex cores on demand. Because these structures are highly stable, very strong magnetic fields of around half a tesla (approximately one-third the field of the strongest permanent magnet) were previously thought to be necessary to accomplish this. At the ALS, a team of researchers from Germany, Belgium, and the U.S. has used time-resolved scanning transmission x-ray microscopy (STXM) to observe vortex motion and demonstrate the feasibility of using weak magnetic fields as low as 1.5 millitesla (mT) to reverse the direction of a vortex core. The observed switching mechanism, which can be understood within the framework of micromagnetic theory, gives insights into basic magnetization dynamics and their possible application to data storage technologies.

111

Magnetic Vortex Core Reversal by Low-Field Excitations  

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

Magnetic Vortex Core Reversal by Low-Field Excitations Print Magnetic Vortex Core Reversal by Low-Field Excitations Print In micrometer-sized magnetic thin films, the magnetization typically adopts an in-plane, circular configuration known as a magnetic vortex. At the vortex core, the magnetization turns sharply out of the plane, pointing either up or down. Magnetic data storage based on this binary phenomenon is an intriguing concept, but it would require the ability to flip the vortex cores on demand. Because these structures are highly stable, very strong magnetic fields of around half a tesla (approximately one-third the field of the strongest permanent magnet) were previously thought to be necessary to accomplish this. At the ALS, a team of researchers from Germany, Belgium, and the U.S. has used time-resolved scanning transmission x-ray microscopy (STXM) to observe vortex motion and demonstrate the feasibility of using weak magnetic fields as low as 1.5 millitesla (mT) to reverse the direction of a vortex core. The observed switching mechanism, which can be understood within the framework of micromagnetic theory, gives insights into basic magnetization dynamics and their possible application to data storage technologies.

112

Magnetic Vortex Core Reversal by Low-Field Excitations  

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

Magnetic Vortex Core Reversal by Low-Field Excitations Print Magnetic Vortex Core Reversal by Low-Field Excitations Print In micrometer-sized magnetic thin films, the magnetization typically adopts an in-plane, circular configuration known as a magnetic vortex. At the vortex core, the magnetization turns sharply out of the plane, pointing either up or down. Magnetic data storage based on this binary phenomenon is an intriguing concept, but it would require the ability to flip the vortex cores on demand. Because these structures are highly stable, very strong magnetic fields of around half a tesla (approximately one-third the field of the strongest permanent magnet) were previously thought to be necessary to accomplish this. At the ALS, a team of researchers from Germany, Belgium, and the U.S. has used time-resolved scanning transmission x-ray microscopy (STXM) to observe vortex motion and demonstrate the feasibility of using weak magnetic fields as low as 1.5 millitesla (mT) to reverse the direction of a vortex core. The observed switching mechanism, which can be understood within the framework of micromagnetic theory, gives insights into basic magnetization dynamics and their possible application to data storage technologies.

113

Tubing on the Ichetucknee Countries  

E-Print Network (OSTI)

, crystal clear water of the Ichetucknee River while you relax in an inner tube. Enjoy the Florida sunshine

Príncipe, José Carlos

114

Ferroelectric nanostructure having switchable multi-stable vortex states  

DOE Patents (OSTI)

A ferroelectric nanostructure formed as a low dimensional nano-scale ferroelectric material having at least one vortex ring of polarization generating an ordered toroid moment switchable between multi-stable states. A stress-free ferroelectric nanodot under open-circuit-like electrical boundary conditions maintains such a vortex structure for their local dipoles when subject to a transverse inhomogeneous static electric field controlling the direction of the macroscopic toroidal moment. Stress is also capable of controlling the vortex's chirality, because of the electromechanical coupling that exists in ferroelectric nanodots.

Naumov, Ivan I. (Fayetteville, AR); Bellaiche, Laurent M. (Fayetteville, AR); Prosandeev, Sergey A. (Fayetteville, AR); Ponomareva, Inna V. (Fayetteville, AR); Kornev, Igor A. (Fayetteville, AR)

2009-09-22T23:59:59.000Z

115

Induction plasma tube  

DOE Patents (OSTI)

An induction plasma tube having a segmented, fluid-cooled internal radiation shield is disclosed. The individual segments are thick in cross-section such that the shield occupies a substantial fraction of the internal volume of the plasma enclosure, resulting in improved performance and higher sustainable plasma temperatures. The individual segments of the shield are preferably cooled by means of a counterflow fluid cooling system wherein each segment includes a central bore and a fluid supply tube extending into the bore. The counterflow cooling system results in improved cooling of the individual segments and also permits use of relatively larger shield segments which permit improved electromagnetic coupling between the induction coil and a plasma located inside the shield. Four embodiments of the invention, each having particular advantages, are disclosed.

Hull, D.E.

1982-07-02T23:59:59.000Z

116

Induction plasma tube  

DOE Patents (OSTI)

An induction plasma tube having a segmented, fluid-cooled internal radiation shield is disclosed. The individual segments are thick in cross-section such that the shield occupies a substantial fraction of the internal volume of the plasma enclosure, resulting in improved performance and higher sustainable plasma temperatures. The individual segments of the shield are preferably cooled by means of a counterflow fluid cooling system wherein each segment includes a central bore and a fluid supply tube extending into the bore. The counterflow cooling system results in improved cooling of the individual segments and also permits use of relatively larger shield segments which permit improved electromagnetic coupling between the induction coil and a plasma located inside the shield. Four embodiments of the invention, each having particular advantages, are disclosed.

Hull, Donald E. (Los Alamos, NM)

1984-01-01T23:59:59.000Z

117

Vortex flow around the bases of obstacles  

E-Print Network (OSTI)

.2 The horseshoe . vortex formed by a separating turbulent boundary layer 5.3 Scour around obstacles in an erodible bed 114 116 117 . ·4 References Uf'l() I:!~oLtlecl F,'obL.efl):' Llr:cl ~u.g5el:dto/J~ fer ju.iLt(t' wc"..,I" 11 2 119 Figures (vi... , are shmm in figUre 2.3.4. It can be seen that there is a rather high le,el of turbulence in the tunnel free stream. This is poss:l.bly due to the extra screens placed upstream of the \\'lorking section. At the higher speeds used this turbulence...

Baker, Christopher James

1979-02-06T23:59:59.000Z

118

Improving Vortex Generators to Enhance the Performance of Air-Cooled Condensers in a Geothermal Power Plant  

SciTech Connect

This report summarizes work at the Idaho National Laboratory to develop strategies to enhance air-side heat transfer in geothermal air-cooled condensers such that it should not significantly increase pressure drop and parasitic fan pumping power. The work was sponsored by the U.S. Department of Energy, NEDO (New Energy and Industrial Technology Development Organization) of Japan, Yokohama National University, and the Indian Institute of Technology, Kanpur, India. A combined experimental and numerical investigation was performed to investigate heat transfer enhancement techniques that may be applicable to largescale air-cooled condensers such as those used in geothermal power applications. A transient heat transfer visualization and measurement technique was employed in order to obtain detailed distributions of local heat transfer coefficients on model fin surfaces. Pressure drop measurements were obtained for a variety of tube and winglet configurations using a single-channel flow apparatus that included four tube rows in a staggered array. Heat transfer and pressure drop measurements were also acquired in a separate multiple-tube row apparatus in the Single Blow Test Facility. In addition, a numerical modeling technique was developed to predict local and average heat transfer for these low-Reynolds number flows, with and without winglets. Representative experimental and numerical results were obtained that reveal quantitative details of local finsurface heat transfer in the vicinity of a circular tube with a single delta winglet pair downstream of the cylinder. Heat transfer and pressure-drop results were obtained for flow Reynolds numbers based on channel height and mean flow velocity ranging from 700 to 6500. The winglets were of triangular (delta) shape with a 1:2 or 1:3 height/length aspect ratio and a height equal to 90% of the channel height. Overall mean fin-surface heat transfer results indicate a significant level of heat transfer enhancement (in terms of Colburn j-factor) associated with deployment of the winglets with circular as well as oval tubes. In general, toe-in (common flow up) type winglets appear to have better performance than the toe-out (common flow down) type winglets. Comparisons of heat transfer and pressure drop results for the elliptical tube versus a circular tube with and without winglets are provided. During the course of their independent research, all of the researchers have established that about 10 to 30% enhancement in Colburn j-factor is expected. However, actual increase in heat transfer rate from a heat exchanger employing finned tubes with winglets may be smaller, perhaps on the order of 2 to 5%. It is also concluded that for any specific application, more full-size experimentation is needed to optimize the winglet design for a specific heat exchanger application. If in place of a circular tube, an oval tube can be economically used in a bundle, it is expected that the pressure drop across the tube bundle with the application of vortex generators (winglets) will be similar to that in a conventional circular tube bundle. It is hoped that the results of this research will demonstrate the benefits of applying vortex generators (winglets) on the fins to improve the heat transfer from the air-side of the tube bundle.

Manohar S. Sohal

2005-09-01T23:59:59.000Z

119

Joined concentric tubes  

SciTech Connect

Tubular objects having two or more concentric layers that have different properties are joined to one another during their manufacture primarily by compressive and friction forces generated by shrinkage during sintering and possibly mechanical interlocking. It is not necessary for the concentric tubes to display adhesive-, chemical- or sinter-bonding to each other in order to achieve a strong bond. This facilitates joining of dissimilar materials, such as ceramics and metals.

DeJonghe, Lutgard; Jacobson, Craig; Tucker, Michael; Visco, Steven

2013-01-01T23:59:59.000Z

120

The multiple vortex nature of tropical cyclogenesis  

E-Print Network (OSTI)

This thesis contains an observational analysis of the genesis of Tropical Storm Allison (2001). Using a paradigm of tropical cyclone formation as the superposition of potential vorticity (PV) anomalies, the importance of different scales of PV merger to various aspects of Allison?s formation is discussed. While only the case of Allison is discussed in great detail, other studies have also documented PV superposition on various scales, and superposition could be important for most tropical cyclones. Preceding Allison?s genesis, PV superposition on the large scale destabilized the atmosphere and increased low-level cyclonic vorticity. This presented a more favorable environment for the formation of MCV-type PV anomalies and smaller, surface-based, meso-?-scale vortices. Although these vortices eventually merged to form a more concentrated vortex with stronger surface pressure gradients, the merger happened well after landfall of Allison and no strengthening ensued. The unstable, vorticity-rich environment was also favorable for the development of even smaller, meso-?-scale vortices that accompanied deep convective cells within one of Allison?s meso-?-scale vortices. The observations herein suggest that the meso-?- scale convective cells and vortices are the respective source of PV production and building blocks for the meso-?-scale vortices. Finally, this thesis discusses issues related to the multiple vortex nature of tropical cyclone formation. For instance, the tracking of developing tropical cyclones is greatly complicated by the presence of multiple vortices. For these cases, the paradigm of a single cyclone center is inappropriate and alternative tracking methods are introduced.

Sippel, Jason Allen

2004-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "vortex tube project" 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

Magnetic Vortex Core Reversal by Low-Field Excitations  

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

on this binary phenomenon is an intriguing concept, but it would require the ability to flip the vortex cores on demand. Because these structures are highly stable, very strong...

122

Linear Dynamics of the Multiple-Vortex Phenomenon in Tornadoes  

Science Conference Proceedings (OSTI)

The reason for existence of two separate unstable modes, previously described by Gall for flows in vortex simulators, is explored. When the energy equation for an unstable disturbance is considered, it is clear that the most unstable wave must be ...

Robert L. Gall

1985-04-01T23:59:59.000Z

123

Baroclinic Transition of a Long-Lived Mesoscale Convective Vortex  

Science Conference Proceedings (OSTI)

The period 5–15 June 2003, during the field phase of the Bow Echo and Mesoscale Convective Vortex (MCV) Experiment (BAMEX), was noteworthy for the wide variety of mesoscale convective systems (MCSs) that occurred. Of particular interest was a ...

Thomas J. Galarneau Jr.; Lance F. Bosart; Christopher A. Davis; Ron McTaggart-Cowan

2009-02-01T23:59:59.000Z

124

Reexamining the Vertical Development of Tornadic Vortex Signatures in Supercells  

Science Conference Proceedings (OSTI)

Observations from a hybrid phased-array Doppler radar, the Mobile Weather Radar, 2005 X-band, Phased-Array (MWR-05XP), were used to investigate the vertical development of tornadic vortex signatures (TVSs) during supercell tornadogenesis. Data ...

Michael M. French; Howard B. Bluestein; Ivan PopStefanija; Chad A. Baldi; Robert T. Bluth

125

Inertia–Gravity Waves Generated within a Dipole Vortex  

Science Conference Proceedings (OSTI)

Vortex dipoles provide a simple representation of localized atmospheric jets. Numerical simulations of a synoptic-scale dipole in surface potential temperature are considered in a rotating, stratified fluid with approximately uniform potential ...

Chris Snyder; David J. Muraki; Riwal Plougonven; Fuqing Zhang

2007-12-01T23:59:59.000Z

126

Ozone Chemistry during the 2002 Antarctic Vortex Split  

Science Conference Proceedings (OSTI)

In September 2002, the Antarctic polar vortex was disturbed, and it split into two parts caused by an unusually early stratospheric major warming. This study discusses the chemical consequences of this event using the Chemical Lagrangian Model of ...

Jens-Uwe Grooß; Paul Konopka; Rolf Müller

2005-03-01T23:59:59.000Z

127

Assimilating Vortex Position with an Ensemble Kalman Filter  

Science Conference Proceedings (OSTI)

Observations of hurricane position, which in practice might be available from satellite or radar imagery, can be easily assimilated with an ensemble Kalman filter (EnKF) given an operator that computes the position of the vortex in the background ...

Yongsheng Chen; Chris Snyder

2007-05-01T23:59:59.000Z

128

Spontaneous Imbalance and Hybrid Vortex–Gravity Structures  

Science Conference Proceedings (OSTI)

After reviewing the background, this article discusses the recently discovered examples of hybrid propagating structures consisting of vortex dipoles and comoving gravity waves undergoing wave capture. It is shown how these examples fall outside ...

Michael E. McIntyre

2009-05-01T23:59:59.000Z

129

Some Aspects of Vortex Structure Related to Tropical Cyclone Motion  

Science Conference Proceedings (OSTI)

Some effect of tropical cyclone structure on the vortex motion are examined in a nondivergent, barotropic numerical model with no basic current. As suggested earlier by DeMaria, the initial maximum wind speed has little effect on the track. ...

Michael Fiorino; Russell L. Elsberry

1989-04-01T23:59:59.000Z

130

MHK Technologies/SeaUrchin Vortex Reaction Turbine | Open Energy  

Open Energy Info (EERE)

SeaUrchin Vortex Reaction Turbine SeaUrchin Vortex Reaction Turbine < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage SeaUrchin Vortex Reaction Turbine.jpg Technology Profile Primary Organization Elemental Energy Technologies Limited ABN 46 128 491 903 Technology Resource Click here Current Technology Type Click here Axial Flow Turbine Technology Readiness Level Click here TRL 4 Proof of Concept Technology Description A revolutionary vortex reaction turbine branded the SeaUrchin an advanced third generation marine turbine technology capable of delivering inexpensive small to large scale baseload or predictable electricity by harnessing the kinetic energy of free flowing ocean currents tides and rivers Technology Dimensions Device Testing Date Submitted 55:15.2

131

VFLOW2D - A Vorte-Based Code for Computing Flow Over Elastically Supported Tubes and Tube Arrays  

SciTech Connect

A numerical flow model is developed to simulate two-dimensional fluid flow past immersed, elastically supported tube arrays. This work is motivated by the objective of predicting forces and motion associated with both deep-water drilling and production risers in the oil industry. This work has other engineering applications including simulation of flow past tubular heat exchangers or submarine-towed sensor arrays and the flow about parachute ribbons. In the present work, a vortex method is used for solving the unsteady flow field. This method demonstrates inherent advantages over more conventional grid-based computational fluid dynamics. The vortex method is non-iterative, does not require artificial viscosity for stability, displays minimal numerical diffusion, can easily treat moving boundaries, and allows a greatly reduced computational domain since vorticity occupies only a small fraction of the fluid volume. A gridless approach is used in the flow sufficiently distant from surfaces. A Lagrangian remap scheme is used near surfaces to calculate diffusion and convection of vorticity. A fast multipole technique is utilized for efficient calculation of velocity from the vorticity field. The ability of the method to correctly predict lift and drag forces on simple stationary geometries over a broad range of Reynolds numbers is presented.

WOLFE,WALTER P.; STRICKLAND,JAMES H.; HOMICZ,GREGORY F.; GOSSLER,ALBERT A.

2000-10-11T23:59:59.000Z

132

Closed cycle steam turbine system with liquid vortex pump  

SciTech Connect

A closed cycle steam generating system is described comprising a steam boiler, and a steam turbine includes a vacuum pump of the liquid vortex type for condensing the exhaust steam from the turbine, a feedwater pump being employed for returning the condensate to the boiler. The tank of the vortex pump is maintained filled with water and the pressure in the tank is regulated automatically to maintain a predetermined value thereof.

Brown, K.D.

1976-08-10T23:59:59.000Z

133

Nonclassicality of vortex Airy beams in the Wigner representation  

Science Conference Proceedings (OSTI)

The Wigner distribution function (WDF) of a vortex Airy beam is calculated analytically. The WDF provides intuitive pictures of the intriguing features of vorticity in phase space. The nonclassical property of the vortex Airy beam and the Airy beam is analyzed through the negative parts of the WDF. The study shows that destructive interference of certain classical waves can mimic nonclassical lights such as those due to quantum effects.

Chen Ruipin [School of Sciences, Zhejiang A and F University, Lin'an, Zhejiang Province 311300 (China); Department of Physics, University of Malaya, 50603 Kuala Lumpur (Malaysia); Ooi, C. H. Raymond [Department of Physics, University of Malaya, 50603 Kuala Lumpur (Malaysia)

2011-10-15T23:59:59.000Z

134

Depinning of a superfluid vortex line by Kelvin waves  

E-Print Network (OSTI)

We measure the interaction of a single superfluid vortex with surface irregularities. While vortex pinning in superconductors usually becomes weaker at higher temperatures, we find the opposite behavior. The pinning steadily increases throughout our measurement range, from 0.15Tc to over 0.5Tc. We also find that moving the other end of the vortex decreases the pinning, so we propose Kelvin waves along the vortex as a depinning mechanism. PACS numbers: 67.40.Vs, 74.60.Ge Pinning sites can trap vortices in a variety of systems. In superconductors, where vortex motion leads to nonzero resistance, a vast amount of work has been devoted to preventing such motion by introducing defects. Experimental work has shown that defects comparable in size to the vortex core make effective pin centers, and that straight [1] or splayed [2] line defects can increase the pin strength. Yet the mechanisms by which vortices interact with pin sites remain unresolved. Experimentally, pinning in superconductors becomes weaker as

L. A. K. Donev; L. Hough; R. J. Zieve

2001-01-01T23:59:59.000Z

135

DEVELOPMENT OF ODS HEAT EXCHANGER TUBING  

SciTech Connect

Work continued on three major tasks of this project--increasing the circumferential strength of MA956 tubing, joining of the MA956 alloy, and determination of the high temperature corrosion limits of the MA956 alloy. With respect to increasing the circumferential strength of a MA956 tube, all of the cold working operations (0, 10, 20, 30, 40%) and annealing treatments (1000, 1150, 1300 C) have been completed. The sample microstructures produced by this processing continue to be analyzed with TEM results providing valuable information on the strengthening mechanism of this alloy. Creep testing to determine the ''stress threshold'' curves for this alloy continues. Regarding joining of the MA956 alloy, additional welds were produced with the friction welding and transient liquid phase bonding techniques. And finally, laboratory high temperature corrosion testing of the material continues in both fluid-side and fire-side simulated environments.

Mark A. Harper, Ph.D.

2002-04-01T23:59:59.000Z

136

A numerical study of steady-state vortex configurations and vortex pinning in type-II superconductors  

E-Print Network (OSTI)

In part I, a numerical study of the mixed states in a mesoscopic type-II superconducting cylinder is described. Steady-state configurations and transient behavior of the magnetic vortices for various values of the applied magnetic field H are presented. Transitions between different multi-vortex states as H is changed is demonstrated by abrupt changes in vortex configurations and jumps in the B vs H plot. An efficient scheme to determine the equilibrium vortex configuration in a mesoscopic system at any given applied field, not limited to the symmetry of the system, is devised and demonstrated. In part II, a superconducting thin film is subject to a non-uniform magnetic field from a vertical magnetic dipole, consisting of two magnetic monopoles of opposite charges. For a film with constant thickness and with no pins, it has been found that the film carries two pairs of vortex-antivortex in the steady state in the imposed flux range of 2.15 < (Phi)+ < 2.90 (in units of flux quantum) and no vortex at all for (Phi)+ <= 2.15. Transitions from a superconducting state with 3 pairs of vortex-antivortex to one with 2 pairs, where a pair of vortex-antivortex annihilates, have been observed in the pseudo-time sequence. With a perturbation with antidots (holes), vortexantivortex pair has been created for lower magnetic fluxes down to (Phi)+ = 1.3. In the sample of size 16(Xi) x 16(Xi), the attraction force between the vortex and antivortex always dominates over the pinning force, so that they eventually come out of pins, move toward each other, and annihilate each other. The annihilation rate, measured with time taken for the annihilation, is reduced noticeably by the increase of the distance between pins, or the increase in the pin size. A simulation of the magnetic vortex pinning in the sample of size 32(Xi) x 32(Xi) suggests we are likely to achieve pinning of the vortex-antivortex pair with the sample size around this and vortex-antivortex separation of 22(Xi). Using this sample as a template, the maximum density of pinned vortices achievable is calculates to be about 7.6 x 10^14 vortices/m2 for (Xi) =~ 1.6A°.

Kim, Sangbum

2004-12-01T23:59:59.000Z

137

Project information  

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

Project Information Amistad Project (Texas) Collbran Project (Colorado) Colorado River Storage Project Dolores Project (Colorado) Falcon Project (Texas) Provo River Project (Utah)...

138

Novel Tube-in-Tube System Simplifies Subsurface Fluid Sampling ...  

* Retrieval of single or multiphase high-purity samples More Information Freifeld, B. M., 2009, “The U-tube: a new paradigm in borehole fluid sampling ...

139

Ion plated electronic tube device  

DOE Patents (OSTI)

An electronic tube and associated circuitry which is produced by ion plating techniques. The process is carried out in an automated process whereby both active and passive devices are produced at very low cost. The circuitry is extremely reliable and is capable of functioning in both high radiation and high temperature environments. The size of the electronic tubes produced are more than an order of magnitude smaller than conventional electronic tubes.

Meek, T.T.

1983-10-18T23:59:59.000Z

140

Field Guide: Boiler Tube Failure  

Science Conference Proceedings (OSTI)

In conventional and combined-cycle plants, boiler tube failures (BTFs) have been the main availability problem for as long as reliable statistics have been kept for each generating source. The three volumes of the Electric Power Research Institute (EPRI) report Boiler and Heat Recovery Steam Generator Tube Failures: Theory and Practice (1012757) present an in-depth discussion of the various BTF and degradation mechanisms, providing plant owners and operators with the technical basis to address tube failu...

2009-12-22T23:59:59.000Z

Note: This page contains sample records for the topic "vortex tube project" 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

Eddy sensors for small diameter stainless steel tubes.  

SciTech Connect

The goal of this project was to develop non-destructive, minimally disruptive eddy sensors to inspect small diameter stainless steel metal tubes. Modifications to Sandia's Emphasis/EIGER code allowed for the modeling of eddy current bobbin sensors near or around 1/8-inch outer diameter stainless steel tubing. Modeling results indicated that an eddy sensor based on a single axial coil could effectively detect changes in the inner diameter of a stainless steel tubing. Based on the modeling results, sensor coils capable of detecting small changes in the inner diameter of a stainless steel tube were designed, built and tested. The observed sensor response agreed with the results of the modeling and with eddy sensor theory. A separate limited distribution SAND report is being issued demonstrating the application of this sensor.

Skinner, Jack L.; Morales, Alfredo Martin; Grant, J. Brian; Korellis, Henry James; LaFord, Marianne Elizabeth; Van Blarigan, Benjamin; Andersen, Lisa E.

2011-08-01T23:59:59.000Z

142

Physics Out Loud - Photomultiplier Tube  

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

Particle Resonance Previous Video (Particle Resonance) Physics Out Loud Main Index Next Video (Proton) Proton Photomultiplier Tube One way we "see" the sub-atomic particles in our...

143

TubeTagger - YouTube-based Concept Detection  

Science Conference Proceedings (OSTI)

We present TubeTagger, a concept-based video retrieval system that exploits web video as an information source. The system performs a visual learning on YouTube clips (i. e., it trains detectors for semantic concepts like "soccer" or "windmill"), and ...

Adrian Ulges; Markus Koch; Damian Borth; Thomas M. Breuel

2009-12-01T23:59:59.000Z

144

FINAL REPORT: RPSEA PROJECT NO.  

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

REPORT: REPORT: RPSEA PROJECT NO. 07121-DW1603D RICE UNIVERSITY Structural Health Monitoring System for Deepwater Risers with Vortex-induced Vibration: Nonlinear Modeling, Blind Identification Fatigue/Damage Estimation and Local Monitoring using Magnetic Flux Leakage by Chaojun Huang A Thesis Submitted in Partial Fulfillment of the Requirements for the Degree Doctor of Philosophy Approved, Thesis Committee: Satish Nagarajaiah, Chair Professor of Civil and Environmental Engineering and Mechanical Engineering and Material Science Jamie E. Padgett Assistant Professor of Civil and Environmental Engineering Andrew J. Dick Assistant Professor of Mechanical Engineering and Material Science Houston, Texas June, 2012 ABSTRACT Structural Health Monitoring System for Deepwater Risers with Vortex-induced Vibration: Nonlinear Modeling, Blind Identification Fatigue/Damage

145

Explosive welding of a tube into a tube sheet  

DOE Patents (OSTI)

A cartridge containing an explosive charge is placed within a tube assembled within a tube sheet. The charge is detonated through use of a detonator cord containing a minimum but effective amount of explosive material. The cord is contained inside a tubular shield throughout most of its length within the cartridge. A small length of the cord extends beyond the tubular shield to contact and detonate the explosive charge in its rear portion near the cartridge base. The cartridge base is provided of substantial mass and thickness in respect to side and front walls of the cartridge to minimize bulging beyond the rear face of the tube sheet. For remote activation an electrically activated detonator of higher charge density than the cord is attached to the cord at a location spaced from the tube sheet, cartridge and tube.

Green, Sheryll C. (London, OH); Linse, Vonne D. (Columbus, OH)

1978-10-03T23:59:59.000Z

146

Barotropic Simulation of Large-Scale Mixing in the Antarctic Polar Vortex  

Science Conference Proceedings (OSTI)

Theory and observations suggest that the Antarctic polar vortex is relatively isolated from midlatitudes, although others have interpreted the observations to indicate that there is substantial mixing from the interior of the vortex into middle ...

Kenneth P. Bowman

1993-09-01T23:59:59.000Z

147

Stratospheric Sudden Warmings as Self-Tuning Resonances. Part I: Vortex Splitting Events  

Science Conference Proceedings (OSTI)

The fundamental dynamics of “vortex splitting” stratospheric sudden warmings (SSWs), which are known to be predominantly barotropic in nature, are reexamined using an idealized single-layer f-plane model of the polar vortex. The aim is to ...

N. Joss Matthewman; J. G. Esler

2011-11-01T23:59:59.000Z

148

A Theory for Mixed Vortex Rossby–Gravity Waves in Tropical Cyclones  

Science Conference Proceedings (OSTI)

Vortex–Rossby waves (VRWs) and inertial gravity waves (IGWs) have been proposed to explain the propagation of spiral rainbands and the development of dynamical instability in tropical cyclones (TCs). In this study, a theory for mixed vortex–...

Wei Zhong; Da-Lin Zhang; Han-Cheng Lu

2009-11-01T23:59:59.000Z

149

Generation and Propagation of Inertia–Gravity Waves from Vortex Dipoles and Jets  

Science Conference Proceedings (OSTI)

This study investigates gravity wave generation and propagation from jets within idealized vortex dipoles using a nonhydrostatic mesoscale model. Two types of initially balanced and localized jets induced by vortex dipoles are examined here. ...

Shuguang Wang; Fuqing Zhang; Chris Snyder

2009-05-01T23:59:59.000Z

150

Influence of a Strong Bottom Slope on the Evolution of a Surface-Intensified Vortex  

Science Conference Proceedings (OSTI)

The authors investigate the influence of steep bottom topography on the propagation of a vortex in a two-layer quasigeostrophic model. The vortex is intensified in the upper layer and the planetary beta effect is taken into account.

Virginie Thierry; Yves Morel

1999-05-01T23:59:59.000Z

151

Vortex dynamics : a window into the properties of type-II superconductors  

E-Print Network (OSTI)

DIEGO Vortex Dynamics: A Window Into the Properties of Type-DISSERTATION Vortex Dynamics: A Window Into the Propertiesa ?lm deposits on the window through which the laser beam

Taylor, Benjamin Jeremy

2006-01-01T23:59:59.000Z

152

Coiled tubing - Operations and services  

Science Conference Proceedings (OSTI)

Drilling with a continuous (rather than jointed) drill string is an old concept that is gaining new attention as a result of recent advances made in coiled tubing and drilling technology. The development of larger diameter, reliable, high-strength coiled tubing and smaller diameter, positive displacement motors, orienting tools, surveying systems and fixed cutting drill bits have given drilling with a continuous drill string a capability that was previously unattainable. Like its many other uses, (e.g., squeeze cementing, wellbore cleanouts, flow initiation, logging) the continuity of coiled tubing gives it several advantages over conventional drill strings. These include: drilling underbalanced safely, significantly reduced trip time, continuous circulation, smaller surface requirements. Coiled tubing drilling operations have smaller surface lease requirements than most conventional rigs due to the smaller footprint of the coiled tubing unit and associated equipment. Current coiled tubing drilling operations have the following limitations: conventional rig assistance is required for well preparation; conventional rigs must assist in running long protective and production casing strings or liners; hole sizes are smaller; working depth capabilities are shallower, coiled tubing life is less. This paper goes on to discuss the history of continuous drill strings and includes information on tubing units, circulating systems, drilling fluids, well control systems, downhole tools, orientation tools, and bottomhole assemblies. It then gives a cost comparison and an application of this type of drilling.

Gronseth, J.M. (Imperial Oil Resources Ltd., Calgary, Alberta (Canada))

1993-04-01T23:59:59.000Z

153

Videos from AMES Laboratory on YouTube  

DOE Data Explorer (OSTI)

Ames Lab created a channel on YouTube near the end of 2009. This collection of clips provides quick looks at some of the outreach activities, educational explanations of various research projects (presented by the researcher involved), and the 2010 State of the Lab Address by Ames Lab Director Alex King. Approximately 50 videos are currently available.

154

Integrated Boiler Tube Failure Reduction/Cycle Chemistry Improvement Program  

Science Conference Proceedings (OSTI)

Boiler tube failures (BTF) and cycle chemistry corrosion and deposition problems remain the leading causes of availability losses in fossil-fired steam plants worldwide. This report describes techniques developed during a 20-year EPRI project to assist utilities in substantially reducing availability and performance losses due to these problems.

2006-05-16T23:59:59.000Z

155

Project 261  

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

NOVEL CORROSION SENSOR FOR ADVANCED NOVEL CORROSION SENSOR FOR ADVANCED FOSSIL ENERGY POWER SYSTEMS Description The overall objective of this proposed project is to develop a new technology for on-line corrosion monitoring based on an innovative concept. The specific objectives and corresponding tasks are (1) develop the sensor and electronic measurement system; (2) evaluate and improve the system in a laboratory muffle furnace; and (3) evaluate and improve the system through tests conducted in a pilot-scale coal combustor (~1 MW). Fireside corrosion refers to the metal loss caused by chemical reactions on surfaces exposed to the combustion environment. Such corrosion is the leading mechanism for boiler tube failures and is a serious concern for current and future energy plants due to the introduction of technologies targeting emissions

156

Combining the vortex-in-cell and parallel fast multipole methods for efficient domain decomposition simulations  

Science Conference Proceedings (OSTI)

A new combination of vortex-in-cell and parallel fast multipole methods is presented which allows to efficiently simulate, in parallel, unbounded and half-unbounded vortical flows (flows with one flat wall). In the classical vortex-in-cell (VIC) method, ... Keywords: Incompressible flows, Lagrangian methods, Parallel fast multipole method, Particle methods, Unbounded flows, Unsteady flows, Vortex methods, Vortex-in-cell method, Wall-bounded flows

Roger Cocle; Grégoire Winckelmans; Goéric Daeninck

2008-02-01T23:59:59.000Z

157

The Data Vortex, an All Optical Path Multicomputer Interconnection Network  

E-Print Network (OSTI)

All optical path interconnection networks employing dense wavelength division multiplexing can provide vast improvements in supercomputer performance. However, the lack of efficient optical buffering requires investigation of new topologies and routing techniques. This paper introduces and evaluates the Data Vortex optical switching architecture which uses cylindrical routing paths as a packet buffering alternative. In addition, the impact of the number of angles on the overall network performance is studied through simulation. Using optimal topology configurations, the Data Vortex is compared to two existing switching architectures—butterfly and omega networks. The three networks are compared in terms of throughput, accepted traffic ratio, and average packet latency. The Data Vortex is shown to exhibit comparable latency and a higher acceptance rate (2x at 50 percent load) than the butterfly and omega topologies.

Cory Hawkins; Benjamin A. Small; D. Scott Wills; Keren Bergman

2007-01-01T23:59:59.000Z

158

Identification of vortexes obstructing the dynamo mechanism in laboratory experiments  

E-Print Network (OSTI)

The magnetohydrodynamic dynamo effect explains the generation of self-sustained magnetic fields in electrically conducting flows, especially in geo- and astrophysical environments. Yet the details of this mechanism are still unknown, e.g., how and to which extent the geometry, the fluid topology, the forcing mechanism and the turbulence can have a negative effect on this process. We report on numerical simulations carried out in spherical geometry, analyzing the predicted velocity flow with the so-called Singular Value Decomposition, a powerful technique that allows us to precisely identify vortexes in the flow which would be difficult to characterize with conventional spectral methods. We then quantify the contribution of these vortexes to the growth rate of the magnetic energy in the system. We identify an axisymmetric vortex, whose rotational direction changes periodically in time, and whose dynamics are decoupled from those of the large scale background flow, is detrimental for the dynamo effect. A compar...

Limone, Angelo; Forest, Cary B; Jenko, Frank

2013-01-01T23:59:59.000Z

159

Low Head, Vortex Induced Vibrations River Energy Converter  

DOE Green Energy (OSTI)

Vortex Induced Vibrations Aquatic Clean Energy (VIVACE) is a novel, demonstrated approach to extracting energy from water currents. This invention is based on a phenomenon called Vortex Induced Vibrations (VIV), which was first observed by Leonardo da Vinci in 1504AD. He called it ‘Aeolian Tones.’ For decades, engineers have attempted to prevent this type of vibration from damaging structures, such as offshore platforms, nuclear fuel rods, cables, buildings, and bridges. The underlying concept of the VIVACE Converter is the following: Strengthen rather than spoil vortex shedding; enhance rather than suppress VIV; harness rather than mitigate VIV energy. By maximizing and utilizing this unique phenomenon, VIVACE takes this “problem” and successfully transforms it into a valuable resource for mankind.

Bernitsas, Michael B.; Dritz, Tad

2006-06-30T23:59:59.000Z

160

Combustion of pulverized coal in vortex structures. Final report, October 1, 1993--December 31, 1995  

Science Conference Proceedings (OSTI)

The objectives of the project were: (i) to understand the effects of heating one of the streams on the characteristics of shear layers, (ii) to investigate the changes in the characteristics of large scale vortex structures in the shear layer caused by the introduction of inert solid particles in one of the feed streams; (iii) to understand the effects of pyrolyzing solids on the shear layer behavior; and (iv) to study the effects of combustion of particles and their pyrolysis products on the shear layer structure, heat release rate, and pollutant emission characteristics. An experimental facility for generating two-dimensional shear layers containing vortex structures has been designed and fabricated. The experimental facility is essentially a low speed wind tunnel designed to (i) provide two gas streams, initially with uniform velocity profiles and isotropic turbulence, mixing at the end of a splitter plate, (ii) introduce vorticity by passively perturbing one of the streams, (iii) allow heating of one of the streams to temperatures high enough to cause pyrolysis of coal particles, and (iv) provide a natural gas flame in one of the streams to result in ignition and burning of coal particles.

Gollahalli, S.R.; Butuk, N.

1996-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "vortex tube project" 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

Shock-compressible-vortex interactions: Computing approximate post-shock fields  

E-Print Network (OSTI)

Shock-compressible-vortex interactions: Computing approximate post-shock fields G.K. O'Reilly and D of the passage of a planar shock through a steady compressible vortex is developed. To compute the approximate post-shock fields, the steady pre-shock vortex is decomposed into a sum of frozen sinusoidal modes

Barr, Al

162

Non-Contact Haptic Feedback Using Air Vortex Rings Sidhant Gupta1,2  

E-Print Network (OSTI)

regions of the human body. Author Keywords Non-contact haptic feedback; air vortex rings ACM1 AirWave: Non-Contact Haptic Feedback Using Air Vortex Rings Sidhant Gupta1,2 , Dan Morris1 feedback into such interaction. In this work, we explore the use of air vortex rings for this purpose

Rajamani, Sriram K.

163

Hanford Site Videos on YouTube  

DOE Data Explorer (OSTI)

For more than forty years, reactors located at Hanford produced plutonium for America's defense program. The process of making plutonium is extremely inefficient in that a massive amount of liquid and solid waste is generated while only a small amount of plutonium is produced. Additionally, all of the facilities and structures that were associated with Hanford's defense mission must also be deactivated, decommissioned, decontaminated, and demolished. That environmental cleanup project is the work that approximately 11,000 Hanford employees are involved with today [copied from http://www.hanford.gov/page.cfm/HanfordsPresentMission]. Snapshots of the work, the issues, and the cleanup successes can be seen on the Hanford Site's YouTube channel. Short clips illustrate demolition projects, installtion of components such as a liner for the landfill, events such as the site fire in 2007 and Secretary of Energy Chu's visit in 2010. Recovery Act Work is highlighted as well.

164

Program on Technology Innovation: Giant Magnetoresistive Array-Based Eddy Current System for Tubing  

Science Conference Proceedings (OSTI)

This technical update summarizes the project activities involving the fabrication and testing of an array-based giant magnetoresistive (GMR) eddy current probe and the associated instrument for nondestructive evaluation (NDE) of tubing flaws.

2009-06-30T23:59:59.000Z

165

Widget:YouTube | Open Energy Information  

Open Energy Info (EERE)

icon Widget:YouTube Jump to: navigation, search This widget displays a YouTube video. Parameters id - the YouTube video id (this is the v parameter or the code at the end...

166

Water-storage-tube systems. Final report  

DOE Green Energy (OSTI)

Passive solar collection/storage/distribution systems were surveyed, designed, fabricated, and mechanically and thermally tested. The types studied were clear and opaque fiberglass tubes, metal tubes with plastic liners, and thermosyphoning tubes. (MHR)

Hemker, P.

1981-12-24T23:59:59.000Z

167

Wigner function and entanglement of generalized quantum optical vortex  

E-Print Network (OSTI)

We calculate the Wigner quasiprobability distribution function of the quantum elliptical vortex (QEV), produced by coupling squeezed coherent states of two modes . The coupling between the two modes is performed by using beam splitter (BS) or a dual channel directional coupler (DCDC). The quantum interference due to the coupling between the two modes promises the generation of controlled entanglement for quantum computation and quantum tomography. We calculate the entanglement of such generalized elliptical vortex formed by quantized radiation field (QEV), using Wigner quasiprobability distribution function for such states. We find a critical squeezing parameter above which the entanglement is less for higher vorticity, which is counter intuitive.

Bandyopadhyay, Abir; Singh, R P

2011-01-01T23:59:59.000Z

168

Method of making straight fuel cell tubes  

DOE Patents (OSTI)

A method and an apparatus for making straight fuel cell tubes are disclosed. Extruded tubes comprising powders of fuel cell material and a solvent are dried by rotating the extruded tubes. The rotation process provides uniform circumferential drying which results in uniform linear shrinkage of the tubes. The resultant dried tubes are very straight, thereby eliminating subsequent straightening steps required with conventional processes. The method is particularly useful for forming inner air electrode tubes of solid oxide fuel cells.

Borglum, Brian P. (Edgewood, PA)

2001-01-01T23:59:59.000Z

169

Tubing drain valve  

SciTech Connect

A method is described for operating a valve means. The valve means comprises a tubular piston movable within a tubular member suitable for use in a borehole pipe string to open and close a port through the wall of the tubular member. The method comprises: biassing the valve means in its closed position; pressurizing the interior of the piston to a predetermined pressure to overcome the biassing closed force and to actuate the valve means to its open position; biassing the valve means to its open position; and actuating the valve means to its closed position by engaging a first arm of a dog pivotally mounted on the piston with an engaging means insertable through the interior of the tubular piston; moving the piston relative to the tubular member; rotating the dog about its pivot to bring a second arm of the dog into contact with a detent in the tubular member; and applying sufficient force to the first arm to continue rotating the dog about the pivot, while engaging the detent with the second arm of the dog, in order to overcome the biassing open force to actuate the valve means to its closed position. A tubing drain valve suitable for use in a borehole pipe string, comprising: a sub suitable for incorporating within a borehole pipe string; and a port between the interior and the exterior of the sub; and valve means for opening and closing the port.

Soderberg, P.B.

1987-02-24T23:59:59.000Z

170

Microhole Coiled Tubing Bottom Hole Assemblies  

Science Conference Proceedings (OSTI)

The original objective of the project, to deliver an integrated 3 1/8-inch diameter Measurement While Drilling (MWD) and Logging While Drilling (LWD) system for drilling small boreholes using coiled tubing drilling, has been achieved. Two prototype systems have been assembled and tested in the lab. One of the systems has been successfully tested downhole in a conventional rotary drilling environment. Development of the 3 1/8-inch system has also lead to development and commercialization of a slightly larger 3.5-inch diameter system. We are presently filling customer orders for the 3.5-inch system while continuing with commercialization of the 3 1/8-inch system. The equipment developed by this project will be offered for sale to multiple service providers around the world, enabling the more rapid expansion of both coiled tubing drilling and conventional small diameter drilling. The project was based on the reuse of existing technology whenever possible in order to minimize development costs, time, and risks. The project was begun initially by Ultima Labs, at the time a small company ({approx}12 employees) which had successfully developed a number of products for larger oil well service companies. In September, 2006, approximately 20 months after inception of the project, Ultima Labs was acquired by Sondex plc, a worldwide manufacturer of downhole instrumentation for cased hole and drilling applications. The acquisition provided access to proven technology for mud pulse telemetry, downhole directional and natural gamma ray measurements, and surface data acquisition and processing, as well as a global sales and support network. The acquisition accelerated commercialization through existing Sondex customers. Customer demand resulted in changes to the product specification to support hotter (150 C) and deeper drilling (20,000 psi pressure) than originally proposed. The Sondex acquisition resulted in some project delays as the resistivity collar was interfaced to a different MWD system and also as the mechanical design was revised for the new pressure requirements. However, the Sondex acquisition has resulted in a more robust system, secure funding for completion of the project, and more rapid commercialization.

Don Macune

2008-06-30T23:59:59.000Z

171

Reply to "Comment on 'Vortex-assisted photon counts and their magnetic field dependence in single-photon superconducting detectors'"  

SciTech Connect

The vortex crossing rate in thin current-biased superconducting strips, calculated within the London approach employing the concept of a vortex as a particle, is very sensitive to the cutoff at the vortex core size. To account properly for the vortex core, one needs to use microscopic theory.

Bulaevskii, L.N.; Graf, Matthias; Kogan, Vladimir G.

2012-07-16T23:59:59.000Z

172

Steam generator tube rupture study  

E-Print Network (OSTI)

This report describes our investigation of steam generator behavior during a postulated tube rupture accident. Our study was performed using the steam generator, thermal-hydraulic analysis code THERMIT-UTSG. The purpose ...

Free, Scott Thomas

1986-01-01T23:59:59.000Z

173

Tube-wave seismic imaging  

DOE Patents (OSTI)

The detailed analysis of cross well seismic data for a gas reservoir in Texas revealed two newly detected seismic wave effects, recorded approximately 2000 feet above the reservoir. A tube-wave (150) is initiated in a source well (110) by a source (111), travels in the source well (110), is coupled to a geological feature (140), propagates (151) through the geological feature (140), is coupled back to a tube-wave (152) at a receiver well (120), and is and received by receiver(s) (121) in either the same (110) or a different receiving well (120). The tube-wave has been shown to be extremely sensitive to changes in reservoir characteristics. Tube-waves appear to couple most effectively to reservoirs where the well casing is perforated, allowing direct fluid contact from the interior of a well case to the reservoir.

Korneev, Valeri A [LaFayette, CA

2009-05-05T23:59:59.000Z

174

Tube-wave seismic imaging  

DOE Patents (OSTI)

The detailed analysis of cross well seismic data for a gas reservoir in Texas revealed two newly detected seismic wave effects, recorded approximately 2000 feet above the reservoir. A tube-wave (150) is initiated in a source well (110) by a source (111), travels in the source well (110), is coupled to a geological feature (140), propagates (151) through the geological feature (140), is coupled back to a tube-wave (152) at a receiver well (120), and is and received by receiver(s) (121) in either the same (110) or a different receiving well (120). The tube-wave has been shown to be extremely sensitive to changes in reservoir characteristics. Tube-waves appear to couple most effectively to reservoirs where the well casing is perforated, allowing direct fluid contact from the interior of a well case to the reservoir.

Korneev, Valeri A. (Lafayette, CA); Bakulin, Andrey (Houston, TX)

2009-10-13T23:59:59.000Z

175

On the Onset Vortex of the Summer Monsoon  

Science Conference Proceedings (OSTI)

In this paper we examine the evolution of the low-level flow over the Arabian Sea during the onset of the summer monsoon. A detailed examination of the onset vortex that forms over the Arabian Sea just prior to the commencement of heavy rains ...

T. N. Krishnamurti; Philip Ardanuy; Y. Ramanathan; Richard Pasch

1981-02-01T23:59:59.000Z

176

Nielsen-Olesen vortex in varying-alpha theories  

E-Print Network (OSTI)

We consider soliton solutions to Bekenstein's theory, for which the fine structure constant $\\alpha=e^2/(4\\pi\\hbar c)$ is allowed to vary due to the presence of a dielectric field pervading the vacuum. More specifically we investigate the effects of a varying $\\alpha$ upon a complex scalar field with a U(1) electromagnetic gauge symmetry subject to spontaneous symmetry breaking. We find vortex solutions to this theory, similar to the Nielsen-Olesen vortex. Near the vortex core the electric charge is typically much larger than far away from the string, lending these strings a superconducting flavour. In general the dielectric field coats the usual local string with a global string envelope. We discuss the cosmological implications of networks of such strings, with particular emphasis on their ability to generate inhomogeneous recombination scenarios. We also consider the possibility of the dielectric being a charged free field. Even though the vacuum of such a field is trivial, we find that the dielectric arranges itself in the shape of a local string, with a quantized magnetic flux at the core -- presumably borrowing these topological features from the underlying Nielsen-Olesen vortex.

J. Magueijo; H. Sandvik; T. W. B. Kibble

2001-01-15T23:59:59.000Z

177

Photomultiplier tube gain regulating system  

DOE Patents (OSTI)

This invention relates to an improved system for regulating the gain of a photomultiplier tube, and was designed for use with the photomultiplier tubes of a GeMSAEC fast analyzers. It has the following advantages over the prior system: noise is virtually eliminated; sample analysis can begin after 3 to 4 revolutions of the rotor; fluorescent and light scattering solutions can be used as a reference; and the reference solution can be in any cuvette on the rotor.

Johnson, Wayne F. (Loudon, TN)

1976-01-01T23:59:59.000Z

178

Tube wall thickness measurement apparatus  

DOE Patents (OSTI)

An apparatus for measuring the thickness of a tube's wall for the tube's entire length and circumference by determining the deviation of the tube wall thickness from the known thickness of a selected standard item. The apparatus comprises a base and a first support member having first and second ends. The first end is connected to the base and the second end is connected to a spherical element. A second support member is connected to the base and spaced apart from the first support member. A positioning element is connected to and movable relative to the second support member. An indicator is connected to the positioning element and is movable to a location proximate the spherical element. The indicator includes a contact ball for first contacting the selected standard item and holding it against the spherical element. The contact ball then contacts the tube when the tube is disposed about the spherical element. The indicator includes a dial having a rotatable needle for indicating the deviation of the tube wall thickness from the thickness of the selected standard item.

Lagasse, Paul R. (Santa Fe, NM)

1987-01-01T23:59:59.000Z

179

Tube wall thickness measurement apparatus  

DOE Patents (OSTI)

An apparatus for measuring the thickness of a tube's wall for the tube's entire length and radius by determining the deviation of the tube wall thickness from the known thickness of a selected standard item. The apparatus comprises a base and a first support member having first and second ends. The first end is connected to the base and the second end is connected to a spherical element. A second support member is connected to the base and spaced apart from the first support member. A positioning element is connected to and movable relative to the second support member. An indicator is connected to the positioning element and is movable to a location proximate the spherical element. The indicator includes a contact ball for first contacting the selected standard item and holding it against the spherical element. The contact ball then contacts the tube when the tube is disposed about the spherical element. The indicator includes a dial having a rotatable needle for indicating the deviation of the tube wall thickness from the thickness of the selected standard item.

Lagasse, P.R.

1985-06-21T23:59:59.000Z

180

Uranium Neutron Coincidence Collar Model Utilizing Boron-10 Lined Tubes  

SciTech Connect

The Department of Energy Office of Nuclear Safeguards and Security (NA-241) is supporting the project Coincidence Counting With Boron-Based Alternative Neutron Detection Technology at Pacific Northwest National Laboratory (PNNL) for the development of a 3He proportional counter alternative neutron coincidence counter. The goal of this project is to design, build and demonstrate a system based upon 10B-lined proportional tubes in a configuration typical for 3He-based coincidence counter applications. This report, providing results for model development of Alternative Boron-Based Uranium Neutron Coincidence Collar (ABUNCL) designs, is a deliverable under Task 2 of the project.

Rogers, Jeremy L.; Ely, James H.; Kouzes, Richard T.; Lintereur, Azaree T.; Siciliano, Edward R.

2012-09-18T23:59:59.000Z

Note: This page contains sample records for the topic "vortex tube project" 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

Interim Report: Coiled Tubing Drilling and Intervention System Using Cost Effective Vessel  

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

DOCUMENT TITLE: DOCUMENT TITLE: Self Supporting Riser Technology to Enable Coiled Tubing Intervention for Deepwater Wells Document No.: 08121-1502-12 RPSEA PROJECT TITLE: Coil Tubing Drilling and Intervention System Using a Cost Effective Vessel RPSEA Project No.: 08121-1502 01 April 2011 Charles R. Yemington, PE Project Manager Nautilus International 400 North Sam Houston Parkway East, Suite 105 Houston, Texas 77060 RPSEA Project No.: 08121-1502 Coiled Tubing Drilling and Intervention System Using a Cost Effective Vessel RPSEA Project 08121-1502 01 April 2011 Page 2 of 91 LEGAL NOTICE This report was prepared by Nautilus International, LLC. as an account of work sponsored by the Research Partnership to Secure Energy for America (RPSEA). RPSEA members, the

182

Core-tube data logger  

DOE Green Energy (OSTI)

Wireline core drilling, increasingly used for geothermal exploration, employs a core-tube to capture a rock core sample during drilling. Three types of core-tube data loggers (CTDL) have been built and tested to date by Sandia national Laboratories. They are: (1) temperature-only logger, (2) temperature/inclinometer logger and (3) heat-shielded temperature/inclinometer logger. All were tested during core drilling operations using standard wireline diamond core drilling equipment. While these tools are designed for core-tube deployment, the tool lends itself to be adapted to other drilling modes and equipment. Topics covered in this paper include: (1) description on how the CTDLs are implemented, (2) the components of the system, (3) the type of data one can expect from this type of tool, (4) lessons learned, (5) comparison to its counterpart and (6) future work.

Henfling, J.A.; Normann, R.A.; Knudsen, S.; Drumheller, D.

1997-01-01T23:59:59.000Z

183

Hairpin vortex formation, a case study for unsteady visualization.  

SciTech Connect

To better understand the vortex dynamics of coherent structures in turbulent and transitional boundary layers, we consider direct numerical simulation of the interaction between a flat-plateboundary-layer flow and an isolated hemispherical roughness element. Of principal interest is the evolution of hairpin vortices that form an interlacing pattern in the wake of the hemisphere, lift away from the wall, and are stretched by the shearing action of the boundary layer. Using animations of unsteady three-dimensional representations of this flow, produced by the vtk toolkit and enhanced to operate in a CAVE virtual environment, we identify and study several key features in the evolution of this complex vortex topology not previously observed in other visualization formats.

Fischer, P. F.; Papka, M. E.; Szymanski, M.; Tufo, H. M.

1999-08-10T23:59:59.000Z

184

MHK Technologies/Vortex Oscillation | Open Energy Information  

Open Energy Info (EERE)

Oscillation Oscillation < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage Vortex Oscillation.jpg Technology Profile Primary Organization Vortex Oscillation Technology Ltd Technology Resource Click here Current Technology Type Click here Attenuator Technology Readiness Level Click here TRL 1 3 Discovery Concept Def Early Stage Dev Design Engineering Technology Description If cylinder or another body is fixed on a moving bonding this force can set the body or its separate parts into oscillation e g elastic slat If the system of mechanical energy output is organized correctly this device can be considered as generator Technology Dimensions Device Testing Date Submitted 08:12.7 << Return to the MHK database homepage Retrieved from

185

Continuation of Studies on Development of ODS Heat Exchanger Tubing  

SciTech Connect

The Department of Energy (DOE), National Energy Technology Center (NETL), has initiated a strategic plan for the development of advanced technologies needed to design and build fossil fuel plants with very high efficiency and environmental performance. These plants, referred to as 'Vision 21' and FutureGen programs by DOE, will produce electricity, chemicals, fuels, or a combination of these products, and possibly secondary products such as steam/heat for industrial use. MA956 is a prime candidate material being considered for a high temperature heat exchanger in the 'Vision 21' and FutureGen programs. This material is an oxide dispersion strengthened (ODS) alloy; however, there are some gaps in the data required to commit to the use of these alloys in a full-size plant. To fill the technology gaps for commercial production and use of the material for 'Advanced Power Generation Systems' this project has performed development activity to significant increase in circumferential strength of MA956 as compared to currently available material, investigated bonding technologies for bonding tube-to-tube joints through joining development, and performed tensile, creep and fire-side corrosion tests to validate the use and fabrication processes of MA956 to heat exchanger tubing applications. Development activities within this projected has demonstrated increased circumferential strength of MA956 tubes through flow form processing. Of the six fabrication technologies for bonding tube-to-tube joints, inertia friction welding (IFW) and flash butt welding (FBW) were identified as processes for joining MA956 tubes. Tensile, creep, and fire-side corrosion test data were generated for both base metal and weld joints. The data can be used for design of future systems employing MA956. Based upon the positive development activities, two test probes were designed and fabricated for field exposure testing at 1204 C ({approx}2200 F) flue gas. The probes contained tube portions with FBW and IFW welded MA956. Field testing of the probes and remaining heat exchanger design activity will be performed by Oak Ridge National Laboratory under DOE Contract DE-AC05-00OR22725.

Lawrence Brown; David Workman; Bimal Kad; Gaylord Smith; Archie Robertson; Ian Wright

2008-04-15T23:59:59.000Z

186

Maine Yankee steam generator tube modification from a radiobiological prospective  

SciTech Connect

Maine Yankee installed permanent sleeving in the primary secondary interface tubing of their steam generators. This repair was necessary because of numerous defects approaching or exceeding technical specification requirements. This project was accomplished under budget, and for a radiation exposure of 141.974 person-rem. This paper addresses the ALARA considerations, temporary lead shielding, mockup training, radiation worker training, radiological initiatives, and lessons learned.

Heath, E.; Granados, B. [Maine Yankee, Wiscasset, MA (United States)

1996-06-01T23:59:59.000Z

187

Observable Vortex Properties in Finite Temperature Bose Gases  

E-Print Network (OSTI)

We study the dynamics of vortices in finite temperature atomic Bose-Einstein condensates, focussing on decay rates, precession frequencies and core brightness, motivated by a recent experiment (Freilich et al. Science 329, 1182 (2010)) in which real-time dynamics of a single vortex was observed. Using the ZNG formalism based on a dissipative Gross-Pitaevskii equation for the condensate coupled to a semi-classical Boltzmann equation for the thermal cloud, we find a rapid nonlinear increase of both the decay rate and precession frequency with increasing temperatures. The increase, which is dominated by the dynamical condensate-thermal coupling is also dependent on the intrinsic thermal cloud collisional dynamics; the precession frequency also varies with the initial radial coordinate. The integrated thermal cloud density in the vortex core is for the most part independent of the position of the vortex (except when it is near the condensate edge) with its value increasing with temperature. This could potentially be used as a variant to the method of Coddington et al. (Phys. Rev. A 70, 063607 (2004)) for experimentally determining the temperature.

A. J. Allen; E. Zaremba; C. F. Barenghi; N. P. Proukakis

2012-10-30T23:59:59.000Z

188

Annihilation of vortex dipole in an Oblate Bose-Einstein Condensate  

E-Print Network (OSTI)

We theoretically explore the annihilation of vortex dipole, generated when an obstacle moves through a condensate, in an oblate Bose-Einstein Condensate and the possible reasons for the annihilation. We show that the grey soliton, which results from vortex dipole annihilation, is lower in energy than the vortex dipole. We also investigate the annihilation events numerically and observe annihilation occurs only when the vortex dipole overtake the obstacle. Further more, we find that the adding noise reduces the probability of annihilation events. This may explain the lack of annihilation events in experimental realizations.

Prabhakar, Shashi; Gautam, S; Angom, D

2013-01-01T23:59:59.000Z

189

Vortex formation of a Bose-Einstein condensate in a rotating deep optical lattice  

Science Conference Proceedings (OSTI)

We study the dynamics of vortex nucleation and lattice formation in a Bose-Einstein condensate in a rotating square optical lattice by numerical simulations of the Gross-Pitaevskii equation. Different dynamical regimes of vortex nucleation are found, depending on the depth and period of the optical lattice. We make an extensive comparison with the experiments by R. A. Williams et al.[Phys. Rev. Lett. 104, 050404 (2010)], especially focusing on the issues of the critical rotation frequency for the first vortex nucleation and the vortex number as a function of rotation frequency.

Kato, Akira; Nakano, Yuki; Kasamatsu, Kenichi; Matsui, Tetsuo [Department of Physics, Kinki University, Higashi-Osaka, Osaka 577-8502 (Japan)

2011-11-15T23:59:59.000Z

190

Numerical Simulation of Flame-Vortex Interactions in Natural and Synthetic Gas Mixtures .  

E-Print Network (OSTI)

??The interactions between laminar premixed flames and counter-rotating vortex pairs in natural and synthetic gas mixtures have been computationally investigated through the use of Direct… (more)

Weiler, Justin D.

2004-01-01T23:59:59.000Z

191

Ceramic vacuum tubes for geothermal well logging  

DOE Green Energy (OSTI)

Useful design data acquired in the evaluation of ceramic vacuum tubes for the development of a 500/sup 0/C instrumentation amplifier are presented. The general requirements for ceramic vacuum tubes are discussed for application to the development of high temperature well logs. Commercially available tubes are described and future contract activities that specifically relate to ceramic vacuum tubes are detailed. Supplemental data are presented in the appendix.

Kelly, R.D.

1977-01-01T23:59:59.000Z

192

NIST Launches YouTube Channel  

Science Conference Proceedings (OSTI)

... The Department of Commerce negotiated a contract with Google that allows its agencies to establish YouTube channels. ...

2011-04-06T23:59:59.000Z

193

Manual tube-to-tubesheet welding torch  

DOE Patents (OSTI)

A welding torch made of a high temperature plastic which fits over a tube intermediate the ends thereof for welding the juncture between the tube and the back side of a tube plate and has a ballooned end in which an electrode, filler wire guide, fiber optic bundle, and blanketing gas duct are disposed.

Kiefer, Joseph H. (Tampa, FL); Smith, Danny J. (Tampa, FL)

1982-01-01T23:59:59.000Z

194

Spring/dimple instrument tube restraint  

DOE Patents (OSTI)

A nuclear fuel assembly for a pressurized water nuclear reactor has a spring and dimple structure formed in a non-radioactive insert tube placed in the top of a sensor receiving instrumentation tube thimble disposed in the fuel assembly and attached at a top nozzle, a bottom nozzle, and intermediate grids. The instrumentation tube thimble is open at the top, where the sensor or its connection extends through the cooling water for coupling to a sensor signal processor. The spring and dimple insert tube is mounted within the instrumentation tube thimble and extends downwardly adjacent the top. The springs and dimples restrain the sensor and its connections against lateral displacement causing impact with the instrumentation tube thimble due to the strong axial flow of cooling water. The instrumentation tube has a stainless steel outer sleeve and a zirconium alloy inner sleeve below the insert tube adjacent the top. The insert tube is relatively non-radioactivated inconel alloy. The opposed springs and dimples are formed on diametrically opposite inner walls of the insert tube, the springs being formed as spaced axial cuts in the insert tube, with a web of the insert tube between the cuts bowed radially inwardly for forming the spring, and the dimples being formed as radially inward protrusions opposed to the springs. 7 figures.

DeMario, E.E.; Lawson, C.N.

1993-11-23T23:59:59.000Z

195

Spring/dimple instrument tube restraint  

DOE Patents (OSTI)

A nuclear fuel assembly for a pressurized water nuclear reactor has a spring and dimple structure formed in a non-radioactive insert tube placed in the top of a sensor receiving instrumentation tube thimble disposed in the fuel assembly and attached at a top nozzle, a bottom nozzle, and intermediate grids. The instrumentation tube thimble is open at the top, where the sensor or its connection extends through the cooling water for coupling to a sensor signal processor. The spring and dimple insert tube is mounted within the instrumentation tube thimble and extends downwardly adjacent the top. The springs and dimples restrain the sensor and its connections against lateral displacement causing impact with the instrumentation tube thimble due to the strong axial flow of cooling water. The instrumentation tube has a stainless steel outer sleeve and a zirconium alloy inner sleeve below the insert tube adjacent the top. The insert tube is relatively non-radioactivated inconel alloy. The opposed springs and dimples are formed on diametrically opposite inner walls of the insert tube, the springs being formed as spaced axial cuts in the insert tube, with a web of the insert tube between the cuts bowed radially inwardly for forming the spring, and the dimples being formed as radially inward protrusions opposed to the springs.

DeMario, Edmund E. (Columbia, SC); Lawson, Charles N. (Columbia, SC)

1993-01-01T23:59:59.000Z

196

Heat exchanger with a removable tube section  

DOE Patents (OSTI)

A heat exchanger is described in which the tube sheet is secured against primary liquid pressure, but which allows for easy removal of the tube section. The tube section is supported by a flange which is secured by a number of shear blocks, each of which extends into a slot which is immovable with respect to the outer shell of the heat exchanger. (auth)

Wolowodiuk, W.; Anelli, J.

1975-07-29T23:59:59.000Z

197

Steam Generator Tube-Plugging and Tube-Sleeving Criteria: Assessment of Current Practices  

Science Conference Proceedings (OSTI)

This report presents a survey of current utility practices regarding steam generator tube plugging and tube sleeving. It also describes an analytic and experimental evaluation of mechanical strain as a parameter for use in tube-plugging and tube-sleeving criteria.

1983-03-01T23:59:59.000Z

198

Description of Selected Algorithms and Implementation Details of a Concept-Demonstration Aircraft VOrtex Spacing System (AVOSS)  

Science Conference Proceedings (OSTI)

A ground-based system has been developed to demonstrate the feasibility of automating the process of collecting relevant weather data, predicting wake vortex behavior from a data base of aircraft, prescribing safe wake vortex spacing criteria, estimating ...

Hinton David A.

2001-06-01T23:59:59.000Z

199

Cloud-Resolving Simulations of Mesoscale Vortex Intensification and Its Effect on a Serial Mesoscale Convective System  

Science Conference Proceedings (OSTI)

The authors performed numerical simulations of the 27–28 May 1998 mesoscale convective vortex (MCV) and mesoscale convective system (MCS) to understand how the MCV modulated the convection, and how the convection intensified the vortex. The fifth-...

Christopher A. Davis; Stanley B. Trier

2002-12-01T23:59:59.000Z

200

Ionization tube simmer current circuit  

DOE Patents (OSTI)

A highly efficient flash lamp simmer current circuit utilizes a fifty percent duty cycle square wave pulse generator to pass a current over a current limiting inductor to a full wave rectifier. The DC output of the rectifier is then passed over a voltage smoothing capacitor through a reverse current blocking diode to a flash lamp tube to sustain ionization in the tube between discharges via a small simmer current. An alternate embodiment of the circuit combines the pulse generator and inductor in the form of an FET off line square wave generator with an impedance limited step up output transformer which is then applied to the full wave rectifier as before to yield a similar simmer current.

Steinkraus, Jr., Robert F. (Livermore, CA)

1994-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "vortex tube project" 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

HIGH CURRENT COAXIAL PHOTOMULTIPLIER TUBE  

DOE Patents (OSTI)

A medium-gain photomultiplier tube having high current output, fast rise- time, and matched output impedance was developed. The photomultiplier tube comprises an elongated cylindrical envelope, a cylindrical anode supported at the axis of the envelope, a plurality of elongated spaced opaque areas on the envelope, and a plurality of light admitting windows. A photo-cathode is supported adjacent to each of the windows, and a plurality of secondary emissive dynodes are arranged in two types of radial arrays which are alternately positioned to fill the annular space between the anode and the envelope. The dynodes are in an array being radially staggered with respect to the dynodes in the adjacent array, the dynodes each having a portion arranged at an angle with respect to the electron path, such that electrons emitted by each cathode undergo multiplication upon impingement on a dynode and redirected flight to the next adjacent dynode.

Glass, N.W.

1960-01-19T23:59:59.000Z

202

Ionization tube simmer current circuit  

DOE Patents (OSTI)

A highly efficient flash lamp simmer current circuit utilizes a fifty percent duty cycle square wave pulse generator to pass a current over a current limiting inductor to a full wave rectifier. The DC output of the rectifier is then passed over a voltage smoothing capacitor through a reverse current blocking diode to a flash lamp tube to sustain ionization in the tube between discharges via a small simmer current. An alternate embodiment of the circuit combines the pulse generator and inductor in the form of an FET off line square wave generator with an impedance limited step up output transformer which is then applied to the full wave rectifier as before to yield a similar simmer current. 6 figures.

Steinkraus, R.F. Jr.

1994-12-13T23:59:59.000Z

203

Cold cathode vacuum discharge tube  

DOE Patents (OSTI)

A cold cathode vacuum discharge tube, and method for making same, with an interior surface of the trigger probe coated with carbon deposited by carbon vapor deposition (CVD) or diamond-like carbon (DLC) deposition. Preferably a solid graphite insert is employed in the probe-cathode structure in place of an aluminum bushing employed in the prior art. The CVD or DLC probe face is laser scribed to allow resistance trimming to match available trigger voltage signals and to reduce electrical aging.

Boettcher, Gordon E. (Albuquerque, NM)

1998-01-01T23:59:59.000Z

204

Film holder for radiographing tubing  

DOE Patents (OSTI)

A film cassette is provided which may be easily placed about tubing or piping and readily held in place while radiographic inspection is performed. A pair of precurved light-impervious semi-rigid plastic sheets, hinged at one edge, enclose sheet film together with any metallic foils or screens. Other edges are made light-tight with removable caps, and the entire unit is held securely about the object to be radiographed with a releasable fastener such as a strip of Velcro.

Davis, Earl V. (Oak Ridge, TN); Foster, Billy E. (Oak Ridge, TN)

1976-01-01T23:59:59.000Z

205

Turbine nozzle stage having thermocouple guide tube  

SciTech Connect

A guide tube is fixed adjacent opposite ends in outer and inner covers of a nozzle stage segment. The guide tube is serpentine in shape between the outer and inner covers and extends through a nozzle vane. An insert is disposed in the nozzle vane and has apertures to accommodate serpentine portions of the guide tube. Cooling steam is also supplied through chambers of the insert on opposite sides of a central insert chamber containing the guide tube. The opposite ends of the guide tube are fixed to sleeves, in turn fixed to the outer and inner covers.

Schotsch, Margaret Jones (Greer, SC); Kirkpatrick, Francis Lawrence (late of Galway, NY); Lapine, Eric Michael (Northwood, NH)

2002-01-01T23:59:59.000Z

206

Ceramic vacuum tubes for geothermal well logging  

DOE Green Energy (OSTI)

The results of investigations carried out into the availability and suitability of ceramic vacuum tubes for the development of logging tools for geothermal wells are summarized. Design data acquired in the evaluation of ceramic vacuum tubes for the development of a 500/sup 0/C instrumentation amplifier are presented. The general requirements for ceramic vacuum tubes for application to the development of high temperature well logs are discussed. Commercially available tubes are described and future contract activities that specifically relate to ceramic vacuum tubes are detailed. Supplemental data is presented in the appendix. (MHR)

Kelly, R.D.

1977-01-12T23:59:59.000Z

207

Project Title  

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

Chart: project timeline - Project Milestones - Budget - Bibliography * Thank you 29 30 Organization Chart * Project team: Purdue University - Dr. Brenda B. Bowen: PI, student...

208

Solution of linear problems of the uniform motion of a vortex source in a multilayer fluid  

Science Conference Proceedings (OSTI)

A method of solving linear problems of the uniform motion of a vortex source in a multilayer fluid having an arbitrary finite number of layers is proposed. As an example, the problem of the motion of a vortex source of given intensity in a three-layer fluid is solved. Formulas for the complex velocities and hydrodynamic reactions are obtained.

Gorlov, S.I.

1995-11-01T23:59:59.000Z

209

Generalized London free energy for high-Tc vortex lattices Ian Affleck  

E-Print Network (OSTI)

Generalized London free energy for high-Tc vortex lattices Ian Affleck Department of Physics-1829 97 50402-4 The London free energy provides a very simple way of studying the vortex lattice that this effect can arise from additional quartic derivative terms in the Ginzburg-Landau GL free energy4­7 or

Franz, Marcel

210

Combustion in Meso-scale Vortex Chambers Ming-hsun Wu*  

E-Print Network (OSTI)

1 Combustion in Meso-scale Vortex Chambers Ming-hsun Wu* , Yanxing Wang, Vigor Yang and Richard A) #12;2 COMBUSTION IN MESO-SCALE VORTEX CHAMBERS Ming-hsun Wu, Yanxing Wang, Vigor Yang and Richard A with the chemical energy varying from 25 to 174W. For the largest combustion volume, hydrogen and hydrocarbons

Yang, Vigor

211

Research on Vortex Unstablity Caused by Bending Deformation of Drilling Bar in BTA Deep Hole Machining  

Science Conference Proceedings (OSTI)

Vortex and unstability of bending boring bar caused by cutting fluid force are researched, with Timoshenko beam model and mated vibration model, based on which machining quality of BTA deep hole drilling and tools life can be promoted in practice. Linear ... Keywords: deep hole boring, boring bar, Timoshenko beam, mating vibration, vortex motion stability

Zhanqi Hu; Wu Zhao

2009-04-01T23:59:59.000Z

212

On a Graphics Hardware-Based Vortex Detection and Visualization System  

Science Conference Proceedings (OSTI)

We present a graphics hardware-based system for interactive denoising, vortex detection, and visualization of vector data. No intermediate results need to be read back by the application once the vector field has been loaded onto the graphics adapter. ... Keywords: Flow visualization, Graphics hardware, Vortex detection

S. Stegmaier; T. Ertl

2005-04-01T23:59:59.000Z

213

Polarization radiation of vortex electrons with large orbital angular momentum  

E-Print Network (OSTI)

Vortex electrons, - freely propagating electrons whose wavefunction has helical wavefronts, - could become a novel tool in the physics of electromagnetic radiation. They carry a non-zero intrinsic orbital angular momentum (OAM) $\\ell$ with respect to the propagation axis and, for \\ell \\gg 1, a large OAM-induced magnetic moment, \\mu ~ \\ell \\mu_B (\\mu_B is the Bohr magneton), which influences the radiation of electromagnetic waves. Here, we consider in detail the OAM-induced effects by such electrons in two forms of polarization radiation, namely in Cherenkov radiation and transition radiation. Thanks to the large \\ell, we can neglect quantum or spin-induced effects, which are of the order of \\hbar \\omega/E_e \\ll 1, but retain the magnetic moment contribution \\ell \\hbar \\omega/E_e \\lesssim 1, which makes the quasiclassical approach to polarization radiation applicable. We discuss the magnetic moment contribution to polarization radiation, which has never been experimentally observed, and study how its visibility depends on the kinematical parameters and the medium permittivity. In particular, it is shown that this contribution can, in principle, be detected in azimuthally non-symmetrical problems, for example when vortex electrons obliquely cross a metallic screen (transition radiation) or move nearby it (diffraction radiation). We predict a left-right angular asymmetry of the transition radiation (in the plane where the charge radiation distributions would stay symmetric), which appears due to an effective interference between the charge radiation field and the magnetic moment one. Numerical values of this asymmetry for vortex electrons with E_e = 300keV and \\ell = O(100-1000) are O(0.1-1%), and we argue that this effect could be detected with existing technology. The finite conductivity of the target and frequency dispersion play the crucial roles in these predictions.

Igor P. Ivanov; Dmitry V. Karlovets

2013-05-28T23:59:59.000Z

214

Minimum wear tube support hole design  

DOE Patents (OSTI)

A minimum-wear through-bore (16) is defined within a heat exchanger tube support plate (14) so as to have an hourglass configuration as determined by means of a constant radiused surface curvature (18) as defined by means of an external radius (R3), wherein the surface (18) extends between the upper surface (20) and lower surface (22) of the tube support plate (14). When a heat exchange tube (12) is disposed within the tube support plate (14) so as to pass through the through-bore (16), the heat exchange tube (12) is always in contact with a smoothly curved or radiused portion of the through-bore surface (16) whereby unacceptably excessive wear upon the heat exchange tube (12), as normally developed by means of sharp edges, lands, ridges, or the like conventionally part of the tube support plates, is eliminated or substantially reduced.

Glatthorn, Raymond H. (St. Petersburg, FL)

1986-01-01T23:59:59.000Z

215

Wigner distribution function and entanglement of generalized quantum optical vortex  

E-Print Network (OSTI)

We calculate the Wigner (quasi)probability distribution function of the quantum optical elliptical vortex (QEV), generated by coupling squeezed vacuum states of two modes. The coupling between the two modes is performed by using beam splitter (BS) or a dual channel directional coupler (DCDC). The quantum interference due to the coupling between the two modes promises the generation of controlled entanglement for quantum computation and quantum tomography. We compute the entanglement of such QEV formed by non-classical radiation field, using Wigner function. We report a critical squeezing parameter above which the entanglement is less for higher vorticity, which is counter intuitive.

Abir Bandyopadhyay; Shashi Prabhakar; R. P. Singh

2011-01-25T23:59:59.000Z

216

NETL: Deepwater Technology Projects  

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

Deepwater Technology Deepwater Technology Deepwater Technology Offshore Architecture | Safety & Environmental | Other UDW Technology | Completed DW Projects Project Number Project Name Primary Performer 10121-4306-01 All Electric Subsea Autonomous High Integrity Pressure Protection System (HIPPS) Architecture GE Global Research 10121-4401-02 Ultra-Deepwater Riser Concepts for High Motion Vessels Stress Engineering Services, Inc. 10121-4405-02 Ultra-deepwater Dry Tree System for Drilling and Production in the Gulf of Mexico Det Norske Veritas 10121-4505-01 Coil Tubing Drilling and Intervention System Using Cost Effective Vessel Nautilus International, LLC 09121-3500-01 Intelligent Production System for Ultra-Deepwater with Short Hop Wireless Power and Wireless Data Transfer for Lateral Production Control and Optimization

217

Vortex nozzle for segmenting and transporting metal chips from turning operations  

DOE Patents (OSTI)

Apparatus for collecting, segmenting and conveying metal chips from machining operations utilizes a compressed gas driven vortex nozzle for receiving the chip and twisting it to cause the chip to segment through the application of torsional forces to the chip. The vortex nozzle is open ended and generally tubular in shape with a converging inlet end, a constant diameter throat section and a diverging exhaust end. Compressed gas is discharged through angled vortex ports in the nozzle throat section to create vortex flow in the nozzle and through an annular inlet at the entrance to the converging inlet end to create suction at the nozzle inlet and cause ambient air to enter the nozzle. The vortex flow in the nozzle causes the metal chip to segment and the segments thus formed to pass out of the discharge end of the nozzle where they are collected, cleaned and compacted as needed.

Bieg, L.F.

1993-04-20T23:59:59.000Z

218

Vortex nozzle for segmenting and transporting metal chips from turning operations  

DOE Patents (OSTI)

This invention is comprised of an apparatus for collecting, segmenting and conveying metal chips from machining operations which utilizes a compressed gas driven vortex nozzle for receiving the chip and twisting it to cause the chip to segment through the application of torsional forces to the chip. The vortex nozzle is open ended and generally tubular in shape with a converging inlet end, a constant diameter throat section and a diverging exhaust end. Compressed gas is discharged through angled vortex ports in the nozzle throat section to create vortex flow in the nozzle and through an annular inlet at the entrance to the converging inlet end to create suction at the nozzle inlet and cause ambient air to enter the nozzle. The vortex flow in the nozzle causes the metal chip to segment and the segments thus formed to pass out of the discharge end of the nozzle where they are collected, cleaned and compacted as needed.

Bieg, L.F.

1992-12-31T23:59:59.000Z

219

Multi-tube arrangement for combustor and method of making the multi-tube arrangement  

SciTech Connect

A fuel injector tube includes a one piece, unitary, polygonal tube having an inlet end and an outlet end. The fuel injector tube further includes a fuel passage extending from the inlet end to the outlet end along a longitudinal axis of the polygonal tube, a plurality of air passages extending from the inlet end to the outlet end and surrounding the fuel passage, and a plurality of fuel holes. Each fuel hole connects an air passage with the fuel passage. The inlet end of the polygonal tube is formed into a fuel tube. A fuel injector includes a plurality of fuel injector tubes and a plate. The plurality of fuel tubes are connected to the plate adjacent the inlet ends of the plurality of fuel injector tubes.

Ziminsky, Willy Steve (Simpsonville, SC)

2012-07-31T23:59:59.000Z

220

Heat Transfer Enhancement in Separated and Vortex Flows  

SciTech Connect

This document summarizes the research performance done at the Heat Transfer Laboratory of the University of Minnesota on heat transfer and energy separation in separated and vortex flow supported by DOE in the period September 1, 1998--August 31, 2003. Unsteady and complicated flow structures in separated or vortex flows are the main reason for a poor understanding of heat transfer under such conditions. The research from the University of Minnesota focused on the following important aspects of understanding such flows: (1) Heat/mass transfer from a circular cylinder; (2) study of energy separation and heat transfer in free jet flows and shear layers; and (3) study of energy separation on the surface and in the wake of a cylinder in crossflow. The current study used three different experimental setups to accomplish these goals. A wind tunnel and a liquid tunnel using water and mixtures of ethylene glycol and water, is used for the study of prandtl number effect with uniform heat flux from the circular cylinder. A high velocity air jet is used to study energy separation in free jets. A high speed wind tunnel, same as used for the first part, is utilized for energy separation effects on the surface and in the wake of the circular cylinder. The final outcome of this study is a substantial advancement in this research area.

Richard J. Goldstein

2004-05-27T23:59:59.000Z

Note: This page contains sample records for the topic "vortex tube project" 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

Chromo-Electric flux tubes  

E-Print Network (OSTI)

The profiles of the chromo-electric field generated by static quark-antiquark, $Q{\\bar Q}$ and three-quark, $QQQ$ sources are calculated in Coulomb gauge. Using a variational ansatz for the ground state, we show that a flux tube-like structure emerges and combines to the ``Y''-shape field profile for three static quarks. The properties of the chromo-electric field are, however, not expected to be the same as those of the full action density or the Wilson line and the differences are discussed.

Patrick O. Bowman; Adam P. Szczepaniak

2004-03-07T23:59:59.000Z

222

Cold cathode vacuum discharge tube  

DOE Patents (OSTI)

A cold cathode vacuum discharge tube, and method for making same, are disclosed with an interior surface of the trigger probe coated with carbon deposited by carbon vapor deposition (CVD) or diamond-like carbon (DLC) deposition. Preferably a solid graphite insert is employed in the probe-cathode structure in place of an aluminum bushing employed in the prior art. The CVD or DLC probe face is laser scribed to allow resistance trimming to match available trigger voltage signals and to reduce electrical aging. 15 figs.

Boettcher, G.E.

1998-03-10T23:59:59.000Z

223

Cold cathode vacuum discharge tube  

DOE Patents (OSTI)

A cold cathode vacuum discharge tube, and method for making same, with an interior surface of the trigger probe coated with carbon deposited by chemical vapor deposition (CVD) or diamond-like carbon (DLC) deposition are disclosed. Preferably a solid graphite insert is employed in the probe-cathode structure in place of an aluminum bushing employed in the prior art. The CVD or DLC probe face is laser scribed to allow resistance trimming to match available trigger voltage signals and to reduce electrical aging. 14 figs.

Boettcher, G.E.

1998-04-14T23:59:59.000Z

224

Dissipative dynamics of vortex arrays in trapped Bose-condensed gases: neutron stars physics on $?$K scale  

E-Print Network (OSTI)

We develop a theory of dissipative dynamics of large vortex arrays in trapped Bose-condensed gases. We show that in a static trap the interaction of the vortex array with thermal excitations leads to a non-exponential decay of the vortex structure, and the characteristic lifetime depends on the initial density of vortices. Drawing an analogy with physics of pulsar glitches, we propose an experiment which employs the heating of the thermal cloud in the course of the decay of the vortex array as a tool for a non-destructive study of the vortex dynamics.

P. O. Fedichev; A. E. Muryshev

2000-04-17T23:59:59.000Z

225

The STACEE Project  

E-Print Network (OSTI)

The Solar Tower Atmospheric Cherenkov Effect Experiment (STACEE) is a telescope designed to explore the gamma-ray sky between 20 and 250 GeV using the atmospheric Cherenkov technique. STACEE is currently under construction. When completed, it will use 48 large heliostat mirrors at the solar research facility at Sandia National Laboratories (Albuquerque, NM) to reflect Cherenkov light created in gamma-ray air showers to secondary mirrors on a central tower. The secondary mirrors image this light onto photomultiplier tube cameras. This paper provides an overview of the STACEE project, including a description of the experimental site and an outline of the current design for the detector components.

Rene A. Ong; Corbin E. Covault

1997-11-25T23:59:59.000Z

226

Large Diameter Lasing Tube Cooling Arrangement  

DOE Patents (OSTI)

A cooling structure (16) for use inside a ceramic cylindrical tube (11) of a metal vapor laser (10) to cool the plasma in the tube (11), the cooling structure (16) comprising a plurality of circular metal members (17,31) and mounting members (18, 34) that position the metal members (17,31) coaxially in the tube (11) to form an annular lasing volume, with the metal members (17, 31) being axially spaced from each other along the length of the tube (11) to prevent the metal members from shorting out the current flow through the plasma in the tube (11) and to provide spaces through which the heat from localized hot spots in the plasma may radiate to the other side of the tube (11).

Hall, Jerome P.; Alger, Terry W.; Anderson, Andrew T.; Arnold, Philip A.

2004-05-18T23:59:59.000Z

227

Tube support grid and spacer therefor  

DOE Patents (OSTI)

A tube support grid and spacers therefor provide radially inward preloading of heat exchange tubes to minimize stress upon base welds due to differential thermal expansion. The grid comprises a concentric series of rings and spacers with opposing concave sides for conforming to the tubes and V-shaped ends to provide resilient flexibility. The flexibility aids in assembly and in transmitting seismic vibrations from the tubes to a shroud. The tube support grid may be assembled in place to achieve the desired inwardly radial preloading of the heat exchange tubes. Tab and slot assembly further minimizes stresses in the system. The radii of the grid rings may be preselected to effect the desired radially inward preloading.

Ringsmuth, Richard J. (Solano Beach, CA); Kaufman, Jay S. (Del Mar, CA)

1986-01-01T23:59:59.000Z

228

Observation of coupled vortex gyrations by 70-ps-time and 20-nm-space- resolved full-field magnetic transmission soft x-ray microscopy  

SciTech Connect

We employed time-and space-resolved full-field magnetic transmission soft x-ray microscopy to observe vortex-core gyrations in a pair of dipolar-coupled vortex-state Permalloy (Ni{sub 80}Fe{sub 20}) disks. The 70 ps temporal and 20 nm spatial resolution of the microscope enabled us to simultaneously measure vortex gyrations in both disks and to resolve the phases and amplitudes of both vortex-core positions. We observed their correlation for a specific vortex-state configuration. This work provides a robust and direct method of studying vortex gyrations in dipolar-coupled vortex oscillators.

Jung, Hyunsung; Yu, Young-Sang; Lee, Ki-Suk; Im, Mi-Young; Fischer, Peter; Bocklage, Lars; Vogel, Andreas; Bolte, Markus; Meier, Guido; Kim, Sang-Koog

2010-09-01T23:59:59.000Z

229

A Built for Purpose Micro-Hole Coiled Tubing Rig (MCTR)  

Science Conference Proceedings (OSTI)

This report will serve as the final report on the work performed from the contract period October 2005 thru April 2007. The project 'A Built for Purpose Microhole Coiled Tubing Rig (MCTR)' purpose was to upgrade an existing state-of-the-art Coiled Tubing Drilling Rig to a Microhole Coiled Tubing Rig (MCTR) capable of meeting the specifications and tasks of the Department of Energy. The individual tasks outlined to meet the Department of Energy's specifications are: (1) Concept and development of lubricator and tool deployment system; (2) Concept and development of process control and data acquisition; (3) Concept and development of safety and efficiency improvements; and (4) Final unit integration and testing. The end result of the MCTR upgrade has produced a unit capable of meeting the following requirements: (1) Capable of handling 1-inch through 2-3/8-inch coiled tubing (Currently dressed for 2-3/8-inch coiled tubing and capable of running up to 3-1/2-inch coiled tubing); (2) Capable of drilling and casing surface, intermediate, production and liner hole intervals; (3) Capable of drilling with coiled tubing and has all controls and installation piping for a top drive; (4) Rig is capable of running 7-5/8-inch range 2 casing; and (5) Capable of drilling 5,000 ft true vertical depth (TVD) and 6,000 ft true measured depth (TMD).

Bart Patton

2007-09-30T23:59:59.000Z

230

An adaptive mesh method for the simulation of Blade Vortex Interaction  

E-Print Network (OSTI)

An adaptive mesh method for the simulation of parallel ics. Blade Vortex Interaction (BV1) with an active Trailing Edge Flap (TEF) is presented. The two-dimensional 1111-steady problem is solved by a higher order upwind Euler method for an unstructured mesh. A local mesh adaptation technique is employed to maintain vortex strength by capturing the details of the convecting vortex. The computational technique does not require any assumption on the vortex structure, and, therefore is suitable for close interaction of the vortex and the blade. The adaptive method is based on cell subdivisions and allows for frequent mesh adaptation due to its fast speed. To demonstrate the reduction of numerical dissipation of a vortex via mesh adaptation, we first consider a simple case with a convecting vortex in freestream. Finally, we apply tile techniques to examine the effectiveness of an active TEF on BVI in reducing the pressure perturbations at the airfoil leading edge. For the boundary motion due to TEF deployment, a local recessing procedure is utilized to maintain mesh quality by avoiding distorted mesh elements near the flap.

Kim, Kyu-Sup

1998-01-01T23:59:59.000Z

231

NETL: Oil & Natural Gas Projects  

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

Mud System for Microhole Coiled Tubing Drilling Mud System for Microhole Coiled Tubing Drilling DE-FC26-03NT15476 Project Goal The goal of the project is to develop an innovative mud system for coiled tubing drilling (CTD) and small-diameter holes (microholes) for vertical, horizontal and multilateral drilling and completion applications. The system will be able to mix the required fluids (water, oil, chemicals, muds, slurries), circulate that mixture downhole (modified 350 gpm @1,000 psi and 15 gpm@ 5,000 psi), clean and store (200 bbls) the base fluids, and be able to perform these functions in an underbalanced condition with zero discharge and low environmental impact. Another primary and most important goal of this project is to develop key components for a new abrasive slurry drilling system.

232

Sampling artifacts from conductive silicone tubing  

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

Sampling artifacts from conductive silicone tubing Sampling artifacts from conductive silicone tubing Title Sampling artifacts from conductive silicone tubing Publication Type Journal Article Year of Publication 2009 Authors Timko, Michael T., Zhenhong Yu, Jesse Kroll, John T. Jayne, Douglas R. Worsnop, Richard C. Miake-Lye, Timothy B. Onasch, David Liscinsky, Thomas W. Kirchstetter, Hugo Destaillats, Amara L. Holder, Jared D. Smith, and Kevin R. Wilson Journal Aerosol Science and Technology Volume 43 Issue 9 Pagination 855-865 Date Published 06/03/2009 Abstract We report evidence that carbon impregnated conductive silicone tubing used in aerosol sampling systems can introduce two types of experimental artifacts: (1) silicon tubing dynamically absorbs carbon dioxide gas, requiring greater than 5 minutes to reach equilibrium and (2) silicone tubing emits organic contaminants containing siloxane that are adsorbed onto particles traveling through it and onto downstream quartz fiber filters. The consequence can be substantial for engine exhaust measurements as both artifacts directly impact calculations of particulate mass-based emission indices. The emission of contaminants from the silicone tubing can result in overestimation of organic particle mass concentrations based on real-time aerosol mass spectrometry and the off-line thermal analysis of quartz filters. The adsorption of siloxane contaminants can affect the surface properties of aerosol particles; we observed a marked reduction in the water-affinity of soot particles passed through conductive silicone tubing. These combined observations suggest that the silicone tubing artifacts may have wide consequence for the aerosol community and the tubing should, therefore, be used with caution. Contamination associated with the use of silicone tubing was observed at ambient temperature and, in some cases, was enhanced by mild heating (<70°C) or pre-exposure to a solvent (methanol). Further evaluation is warranted to quantify systematically how the contamination responds to variations in system temperature, physicochemical particle properties, exposure to solvent, sample contact time, tubing age, and sample flow rates.

233

Literature search for ceramic vacuum tubes  

DOE Green Energy (OSTI)

The NTIS and Engineering Index files were searched for citations relating to Ceramic and/or Metal Electron Tubes and High Temperature Electronics. A total of 24 citations were found relating directly to ceramic tubes and 24 to high temperature electronics. A search for electron tubes in general was examined for high temperature applications and 39 were obtained. Computer printouts of the abstracts are included in appendices. (MHR)

Cannon, W.

1977-01-12T23:59:59.000Z

234

Reducing gain shifts in photomultiplier tubes  

SciTech Connect

A means is provided for reducing gain shifts in multiplier tubes due to varying event count rates. It includes means for limiting the number of cascaded, active dynodes of the multiplier tube to a predetermined number with the last of predetermined number of dynodes being the output terminal of the tube. This output is applied to an amplifier to make up for the gain sacrificed by not totally utilizing all available active stages of the tube. Further reduction is obtained by illuminating the predetermined number of dynodes with a light source of such intensity that noise appearing at the output dynode associated with the illumination is negligible.

Cohn, Charles E. (Clarendon Hills, IL)

1976-01-01T23:59:59.000Z

235

Carbon Nano Tubes (CNT) / Aragonite Precipitated Calcium ...  

Science Conference Proceedings (OSTI)

Presentation Title, Carbon Nano Tubes (CNT) / Aragonite Precipitated Calcium ... Porous Rare-Earth Containing NbTiAl-Based High-entropy Materials Used for ...

236

Condenser Tube Failures: Theory and Practice  

Science Conference Proceedings (OSTI)

This report summarizes information on all aspects of condenser tube failure (CTF) including failure mechanisms, possible root causes, and corrective actions.

2005-12-19T23:59:59.000Z

237

GEIGER-MULLER TYPE COUNTER TUBE  

DOE Patents (OSTI)

A single counter tube capable of responding to a wide range of intensities is described. The counter tube comprises a tubular cathode and an anode extending centrally of the cathode. The spacing between the outer surface of the anode and the inner surface of the cathode is varied along the length of the tube to provide different counting volumes in adjacent portions of the tube. A large counting volume in one portion adjacent to a low-energy absorption window gives adequate sensitivity for measuring lowintensity radiation, while a smaller volume with close electrode spacing is provided in the counter to make possible measurement of intense garnma radiation fields.

Fowler, I.L.; Watt, L.A.K.

1959-12-15T23:59:59.000Z

238

Carbon NanoTube Digital Electronics Workshop  

Science Conference Proceedings (OSTI)

Carbon NanoTube Digital Electronics Workshop. Purpose: To review and discuss the current status and potential benefits of carbon nanotubes in ...

2012-08-29T23:59:59.000Z

239

Pool boiling of R-114/oil mixtures from single tubes and tube bundles. Master's thesis  

Science Conference Proceedings (OSTI)

An apparatus was designed, fabricated, and operated for the testing of horizontal tube bundles for boiling of R-114 with various concentrations of oil. Preliminary data were taken on the top tube in the bundle, with and without the other tubes in operation. Results showed up to a 37% increase in the boiling heat-transfer coefficient as a result of the favorable bundle effect. In a separate single-tube apparatus, three enhanced tubes were tested at a saturation temperature of 2.2 C with oil mass concentrations of 0, 1, 2, 3, 6 and 10%. The tubes were: 1) a finned tube with 1024 fins per meter, 2) a finned tube with 1575 fins per meter and 3) a Turbo-B tube. These tubes resulted in enhancement ratios in pure refrigerant of 2.8, 3.8 and 5.2, respectively, at a practical heat flux of 30 kW/sq. meter. With 3% oil, these ratios were decreased to 2.6, 3.5 and 5, while with 10% oil, these ratios were further reduced to 2.6, 3.2 and 4.7, respectively. Based on these results, the use of Turbo-B tubes is expected to result in significant savings in weight and size of evaporators over the finned tubes presently in use on board some naval vessels.

Murphy, T.J.

1987-09-01T23:59:59.000Z

240

Project Accounts  

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

» Project Accounts » Project Accounts Project Accounts Overview Project accounts are designed to facilitate collaborative computing by allowing multiple users to use the same account. All actions performed by the project account are traceable back to the individual who used the project account to perform those actions via gsisshd accounting logs. Requesting a Project Account PI's, PI proxies and project managers are allowed to request a project account. In NIM do "Actions->Request a Project Account" and fill in the form. Select the repository that the Project Account is to use from the drop-down menu, "Sponsoring Repository". Enter the name you want for the account (8 characters maximum) and a description of what you will use the account for and then click on the "Request Project Account" button. You

Note: This page contains sample records for the topic "vortex tube project" 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

Axial dipolar dynamo action in the Taylor-Green vortex  

E-Print Network (OSTI)

We present a numerical study of the magnetic field generated by the Taylor-Green vortex. We show that periodic boundary conditions can be used to mimic realistic boundary conditions by prescribing the symmetries of the velocity and magnetic fields. This gives insight in some problems of central interest for dynamos: the possible effect of velocity fluctuations on the dynamo threshold, the role of boundary conditions on the threshold and on the geometry of the magnetic field generated by dynamo action. In particular, we show that an axial dipolar dynamo similar to the one observed in a recent experiment can be obtained with an appropriate choice of the symmetries of the magnetic field. The nonlinear saturation is studied and a simple model explaining the magnetic Prandtl number dependence of the super/sub critical nature of the dynamo transition is given.

Giorgio Krstulovic; Gentien Thorner; Julien-Piera Vest; Stephan Fauve; Marc Brachet

2011-09-19T23:59:59.000Z

242

Vortex flow in the technology of radiation wave cracking (RWC)  

E-Print Network (OSTI)

This article examines the theory of vortex flows in relation to the processes occurring in the radiation-wave cracking of crude oil, when the crude oil is sprayed into the gas stream in the form of a mist and then is fed into the reactor, where it is treated by the accelerated electrons and the UHF radiation. The output of this process are the products with the specified parameters (high-octane petroleum products). This process operates at the ambient pressure and temperature, which makes the process safer for industrial purposes. Besides the process itself, the authors described the equipment used in this process, as well as the parameters of the optimal process.

L. A. Tsoy; V. N. Kolushov; A. G. Komarov; A. N. Tsoy

2012-09-16T23:59:59.000Z

243

Vortex flow in the technology of radiation wave cracking (RWC)  

E-Print Network (OSTI)

This article examines the theory of vortex flows in relation to the processes occurring in the radiation-wave cracking of crude oil, when the crude oil is sprayed into the gas stream in the form of a mist and then is fed into the reactor, where it is treated by the accelerated electrons and the UHF radiation. The output of this process are the products with the specified parameters (high-octane petroleum products). This process operates at the ambient pressure and temperature, which makes the process safer for industrial purposes. Besides the process itself, the authors described the equipment used in this process, as well as the parameters of the optimal process.

Tsoy, L A; Komarov, A G; Tsoy, A N

2012-01-01T23:59:59.000Z

244

Energy harvesting using vortex-induced vibrations of tensioned cables  

E-Print Network (OSTI)

The development of energy harvesting systems based on fluid/structure interactions is part of the global search for innovative tools to produce renewable energy. In this paper, the possibility to harvest energy from a flow using vortex-induced vibrations (VIV) of a tensioned flexible cable is analyzed. The fluid loading on the vibrating solid and resulting dynamics are computed using an appropriate wake-oscillator model, allowing one to perform a systematic parametric study of the efficiency. The generic case of an elastically-mounted rigid cylinder is first investigated, before considering an infinite cable with two different types of energy harvesting : a uniformly spanwise distributed harvesting and then a periodic distribution of discrete harvesting devices. The maximum harvesting efficiency is of the same order for each configuration and is always reached when the solid body and its wake are in a frequency lock-in state.

Grouthier, Clement; de Langre, Emmanuel

2012-01-01T23:59:59.000Z

245

Composite tube cracking in kraft recovery boilers: A state-of-the-art review  

Science Conference Proceedings (OSTI)

Beginning in the mid-1960s, increasing energy costs in Finland and Sweden made energy recovery more critical to the cost-effective operation of a kraft pulp mill. Boiler designers responded to this need by raising the steam operating pressure, but almost immediately the wall tubes in these new boilers began to corrode rapidly. Test panels installed in the walls of the most severely corroding boiler identified austenitic stainless steel as sufficiently resistant to the new corrosive conditions, and discussions with Sandvik AB, a Swedish tube manufacturer, led to the suggestion that coextruded tubes be used for water wall service in kraft recovery boilers. Replacement of carbon steel by coextruded tubes has solved most of the corrosion problems experienced by carbon steel wall tubes, however, these tubes have not been problem-free. Beginning in early 1995, a multidisciplinary research program funded by the US Department of Energy was established to investigate the cause of cracking in coextruded tubes and to develop improved materials for use in water walls and floors of kraft recovery boilers. One portion of that program, a state-of-the-art review of public- and private-domain documents related to coextruded tube cracking in kraft recovery boilers is reported here. Sources of information that were consulted for this review include the following: tube manufacturers, boiler manufacturers, public-domain literature, companies operating kraft recovery boilers, consultants and failure analysis laboratories, and failure analyses conducted specifically for this project. Much of the information contained in this report involves cracking problems experienced in recovery boiler floors and those aspects of spout and air-port-opening cracking not readily attributable to thermal fatigue. 61 refs.

Singbeil, D.L.; Prescott, R. [Pulp and Paper Research Inst. of Canada, Vancouver, British Columbia (Canada); Keiser, J.R.; Swindeman, R.W. [Oak Ridge National Lab., TN (United States)

1997-07-01T23:59:59.000Z

246

Project 244  

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

PROJECT PARTNER Advanced Technology Systems, Inc. Pittsburgh, PA PROJECT PARTNERS Ohio University Athens, OH Texas A&M University-Kingsville Kingsville, TX WEBSITES http:...

247

Projects | ORNL  

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

and Conferences Supporting Organizations Supercomputing and Computation Home | Science & Discovery | Supercomputing and Computation | Projects Projects 1-10 of 180 Results Prev...

248

Project Title  

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

CCS August 20-22, 2013 2 Presentation Outline * Benefits to the program * Project overall objectives * Technical status * Project summary * Conclusions and future plans 3 Benefit...

249

Raft River condenser-tube examination  

DOE Green Energy (OSTI)

In the program of development of a water treatment for the 5 MW Raft River power plants' carbon steel heat rejection system, four carbon steel tubes were analyzed in this batch. The results of visual and scanning electron microscope examination of the tubes are presented. (MHR)

Suciu, D.F.

1981-04-03T23:59:59.000Z

250

The Kinematics of a Midlatitude, Continental Mesoscale Convective System and Its Mesoscale Vortex  

Science Conference Proceedings (OSTI)

The authors present a unique, scale-discriminating study of the environment-relative circulations within a mesoscale convective system (MCS) and mesoscale convective vortex (MCV). The MCS, a leading convective line and trailing stratiform region ...

Jason C. Knievel; Richard H. Johnson

2002-07-01T23:59:59.000Z

251

Wave–Current Interaction: A Comparison of Radiation-Stress and Vortex-Force Representations  

Science Conference Proceedings (OSTI)

The vortex-force representation of the wave-averaged effects on currents is compared to the radiation-stress representation in a scaling regime appropriate to coastal and shelf waters. Three-dimensional and vertically integrated expressions for ...

E. M. Lane; J. M. Restrepo; J. C. McWilliams

2007-05-01T23:59:59.000Z

252

Evidence against an Antarctic Stratospheric Vortex Split during the Periods of Pre-IGY Temperature Measurements  

Science Conference Proceedings (OSTI)

Historic upper-air observations from Antarctica are inspected to investigate the uniqueness of the vortex split in the Antarctic spring of 2002. No comprehensive meteorological observations are available prior to the International Geophysical ...

Barbara Naujokat; Howard K. Roscoe

2005-03-01T23:59:59.000Z

253

Midtropospheric Anticyclonic Vortex Street Associated with a Cloud Band near a Cold Front  

Science Conference Proceedings (OSTI)

The characteristics and formation mechanism of an anticyclonic vortex street of meso-? scale, which appeared near a cold front around the Ryukyu Islands, Japan, on 11 April 1995, were examined by an analysis of observational data, a numerical ...

Eizi Toyoda; Hiroshi Niino; Kazuhisa Tsuboki; Ryuji Kimura; Masanori Yoshizaki

1999-08-01T23:59:59.000Z

254

Vortex Ring Dyons of the SU(2) Yang-Mills-Higgs Model  

Science Conference Proceedings (OSTI)

We present an axially symmetric vortex ring dyons solutions of the SU(2) Yang-Mills-Higgs theory. These vortex rings carry electric charges that are determined by a parameter, -1{<=}{eta}{<=}1. They possess vanishing magnetic charge and are located at a ring centered around the z-axis where the Higgs field vanishes. These stationary vortex ring dyon solutions possess finite energy but they do not satisfy the first order Bogomol'nyi equations. In the Bogomol'nyi-Prasad-Sommerfield (BPS) limit where the Higgs field potential is zero, the time component of the gauge field is parallel to the Higgs field in isospace. The total energy, net electric charge and diameter of the vortex ring increase exponentially to infinity when {eta} approaches {+-}1. On the contrary, when {lambda} = 1, all these three values reach their critical value as {eta} approaches {+-}1.

Lim, Kok-Geng; Teh, Rosy; Wong, Khai-Ming [School of Physics, Universiti Sains Malaysia 11800 USM Penang (Malaysia)

2011-03-30T23:59:59.000Z

255

The Splitting of the Stratospheric Polar Vortex in the Southern Hemisphere, September 2002: Dynamical Evolution  

Science Conference Proceedings (OSTI)

The polar vortex of the Southern Hemisphere (SH) split dramatically during September 2002. The large-scale dynamical effects were manifest throughout the stratosphere and upper troposphere, corresponding to two distinct cyclonic centers in the ...

Andrew J. Charlton; Alan O’Neill; William A. Lahoz; Paul Berrisford

2005-03-01T23:59:59.000Z

256

Ensemble Forecasting of Tropical Cyclone Motion Using a Barotropic Model. Part II: Perturbations of the Vortex  

Science Conference Proceedings (OSTI)

In Part I of this study, the technique of ensemble forecasting is applied to the problem of tropical cyclone motion prediction by perturbing the environmental flow. In this part, the focus is shifted to perturbation of the vortex structure. The ...

Kevin K. W. Cheung; Johnny C. L. Chan

1999-11-01T23:59:59.000Z

257

Jovian Dynamics. Part II: The Genesis and Equilibration of Vortex Sets  

Science Conference Proceedings (OSTI)

To extend studies of the dynamics of thin atmospheric layers, the generation and equilibration of multiple anticyclonic vortex sets associated with long solitary baroclinic Rossby waves are examined numerically using a primitive equation model ...

G. P. Williams

2002-04-01T23:59:59.000Z

258

Structure of a Midtropospheric Vortex Induced by a Mesoscale Convective System  

Science Conference Proceedings (OSTI)

On 9 June 1988 a mesoscale (200-km diameter) convectively generated vortex (MCV) passed through the Colorado wind-profiling network. The generating convective system, which was too small to meet Maddox’s mesoscale convective complex criteria, ...

Diana L. Bartels; John M. Brown; Edward I. Tollerud

1997-02-01T23:59:59.000Z

259

A Vortex-Based Perspective of Eastern Pacific Tropical Cyclone Formation  

Science Conference Proceedings (OSTI)

Tropical cyclone formation over the eastern Pacific during 2005 and 2006 was examined using primarily global operational analyses from the National Centers for Environmental Prediction. This paper represents a “vortex view” of genesis, adding to ...

Christopher Davis; Chris Snyder; Anthony C. Didlake Jr.

2008-07-01T23:59:59.000Z

260

Observations of a Storm Containing Misocyclones, Downbursts, and Horizontal Vortex Circulations  

Science Conference Proceedings (OSTI)

On 30 June 1982, a multicellular storm in Colorado produced four downbursts, three misocyclones, a miso-anticyclone, and horizontal vortex circulations within a relatively small area of the storm. Weather events associated with this storm ...

Cathy J. Kessinger; David B. Parsons; James W. Wilson

1988-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "vortex tube project" 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

The Role of Vortex and Environment Errors in Genesis Forecasts of Hurricanes Danielle and Karl (2010)  

Science Conference Proceedings (OSTI)

An ensemble of Weather Research and Forecasting Model (WRF) forecasts initialized from a cycling ensemble Kalman filter (EnKF) system is used to evaluate the sensitivity of Hurricanes Danielle and Karl’s (2010) genesis forecasts to vortex and ...

Ryan D. Torn; David Cook

2013-01-01T23:59:59.000Z

262

An Analytic Vortex Initialization Technique for Idealized Tropical Cyclone Studies in AGCMs  

Science Conference Proceedings (OSTI)

The paper discusses the design of idealized tropical cyclone experiments in atmospheric general circulation models (AGCMs). The evolution of an initially weak, warm-core vortex is investigated over a 10-day period with varying initial conditions ...

Kevin A. Reed; Christiane Jablonowski

2011-02-01T23:59:59.000Z

263

The Garden City, Kansas, Storm during VORTEX 95. Part II: The Wall Cloud and Tornado  

Science Conference Proceedings (OSTI)

On 16 May 1995, a supercell storm produced an F1 tornado near Garden City, Kansas, during VORTEX (Verification of the Origins of Rotation in Tornadoes Experiment). This event provided the first opportunity to synthesize data collected by a new ...

Roger M. Wakimoto; Chinghwang Liu

1998-02-01T23:59:59.000Z

264

The Effect of Tropospheric Jet Latitude on Coupling between the Stratospheric Polar Vortex and the Troposphere  

Science Conference Proceedings (OSTI)

A dry general circulation model is used to investigate how coupling between the stratospheric polar vortex and the extratropical tropospheric circulation depends on the latitude of the tropospheric jet. The tropospheric response to an identical ...

Chaim I. Garfinkel; Darryn W. Waugh; Edwin P. Gerber

2013-03-01T23:59:59.000Z

265

The Role of Multiple Vortex Tornado Structure in Causing Storm Researcher Fatalities  

Science Conference Proceedings (OSTI)

A large and violent tornado/multiple vortex mesocyclone (MVMC) / tornado tracked east and northeastward near El Reno, Oklahoma on 31-May-2013, causing eight fatalities, including storm-chasers/researchers attempting to deploy in-situ instrumentation. Sub-...

Joshua Wurman; Karen Kosiba; Paul Robinson; Tim Marshall

266

A Concentrated Outbreak of Tornadoes, Downbursts and Microbursts, and Implications Regarding Vortex Classification  

Science Conference Proceedings (OSTI)

A remarkable case of severe weather occurred near Springfield, Illinois on 6 August 1977. Aerial and ground surveys revealed that 17 cyclonic vortices an anticyclonic vortex, 10 downbursts and 19 microbursts occurred in a limited (20 km × 40 km) ...

Gregory S. Forbes; Roger M. Wakimoto

1983-01-01T23:59:59.000Z

267

Mesoscale Convective Vortex Formation in a Weakly Sheared Moist Neutral Environment  

Science Conference Proceedings (OSTI)

Idealized simulations of a diabatic Rossby vortex (DRV) in an initially moist neutral baroclinic environment are performed using the fifth-generation National Center for Atmospheric Research–Pennsylvania State University (NCAR–PSU) Mesoscale ...

Robert J. Conzemius; Richard W. Moore; Michael T. Montgomery; Christopher A. Davis

2007-05-01T23:59:59.000Z

268

Intense Vortex Motion on the Beta Plane: Development of the Beta Gyres  

Science Conference Proceedings (OSTI)

An analytical theory is presented for the self-induced translation of an intense vortex relative to a uniform background flow on the ? plane. The equivalent barotropic approximation is used to formulate the initial value problem within a polar ...

Georgi G. Sutyrin; Glenn R. Flierl

1994-03-01T23:59:59.000Z

269

Interaction of a Baroclinic Vortex with Background Shear: Application to Hurricane Movement  

Science Conference Proceedings (OSTI)

Most extant studies of tropical cyclone movement consider a barotropic vortex on a ? plane. However, observations have shown that real tropical cyclones are strongly baroclinic, with broad anticyclones aloft. Also, the distribution of the large-...

Chun-Chieh Wu; Kerry A. Emanuel

1993-01-01T23:59:59.000Z

270

The Uses and Limitations of Contour Advection as a Technique for Examining Arctic Vortex Dynamics  

Science Conference Proceedings (OSTI)

A contour advection technique, contour advection with surgery (CAS), is applied to the Northern Hemisphere Arctic vortex during several dynamically active periods in midwinter and at several different levels in the stratosphere. The ability of ...

Michael N. Baker; Derek M. Cunnold

2001-08-01T23:59:59.000Z

271

Verification of RUC 0–1-h Forecasts and SPC Mesoscale Analyses Using VORTEX2 Soundings  

Science Conference Proceedings (OSTI)

This study uses radiosonde observations obtained during the second phase of the Verification of the Origins of Rotation in Tornadoes Experiment (VORTEX2) to verify base-state variables and severe-weather-related parameters calculated from Rapid ...

Michael C. Coniglio

2012-06-01T23:59:59.000Z

272

The Gradient Genesis of Stratospheric Trace Species in the Subtropics and around the Polar Vortex  

Science Conference Proceedings (OSTI)

Mechanisms that control the formation and decay of meridional gradients in stratospheric trace species in the subtropics and around the polar vortex are investigated using a gradient genesis equation that uses mass-weighted isentropic zonal ...

Kazuyuki Miyazaki; Toshiki Iwasaki

2008-02-01T23:59:59.000Z

273

A Mesoscale Vortex Couplet Observed in the Trailing Anvil of a Multicellular Convective Complex  

Science Conference Proceedings (OSTI)

Observations collected during the Oklahoma–Kansas PRE-STORM experiment are used to document the evolution and structure of a mesoscale vortex couplet that developed in the mesoscale convective system that occurred on 16–17 June 1985. The ...

Johannes Verlinde; William R. Cotton

1990-05-01T23:59:59.000Z

274

Parametric Representation of the Primary Hurricane Vortex. Part II: A New Family of Sectionally Continuous Profiles  

Science Conference Proceedings (OSTI)

For applications such as windstorm underwriting or storm-surge forecasting, hurricane wind profiles are often approximated by continuous functions that are zero at the vortex center, increase to a maximum in the eyewall, and then decrease ...

H. E. Willoughby; R. W. R. Darling; M. E. Rahn

2006-04-01T23:59:59.000Z

275

Influence of Balanced Motions on Heavy Precipitation within a Long-Lived Convectively Generated Vortex  

Science Conference Proceedings (OSTI)

The forcing of heavy precipitation within a long-lived convectively generated mesoscale vortex (MCV) is investigated with the aid of diagnoses from Rapid Update Cycle gridded analyses. Organized convection within the MCV followed a distinct ...

Stanley B. Trier; Christopher A. Davis

2002-04-01T23:59:59.000Z

276

Source of Gravity Waves within a Vortex-Dipole Jet Revealed by a Linear Model  

Science Conference Proceedings (OSTI)

This study develops a linear numerical model to address the source mechanism of the gravity waves generated within a vortex dipole simulated in a fully nonlinear nonhydrostatic mesoscale model. The background flow for this linear model is ...

Shuguang Wang; Fuqing Zhang

2010-05-01T23:59:59.000Z

277

Submonthly Polar Vortex Variability and Stratosphere–Troposphere Coupling in the Arctic  

Science Conference Proceedings (OSTI)

A principal component analysis is performed to characterize intraseasonal variability in the boreal stratospheric polar vortex. In contrast to previous studies, the current analysis examines daily zonal-mean variability within a limited spatial ...

Robert X. Black; Brent A. McDaniel

2009-11-01T23:59:59.000Z

278

A New Parametric Model of Vortex Tangential-Wind Profiles: Development, Testing, and Verification  

Science Conference Proceedings (OSTI)

A new parametric model of vortex tangential-wind profiles is presented that is primarily designed to depict realistic-looking tangential wind profiles such as those in intense atmospheric vortices arising in dust devils, waterspouts, tornadoes, ...

Vincent T. Wood; Luther W. White

2011-05-01T23:59:59.000Z

279

Maximum Likelihood Estimates of Vortex Parameters from Simulated Coherent Doppler Lidar Data  

Science Conference Proceedings (OSTI)

The performance of pulsed coherent Doppler lidar in estimating aircraft trailing wake vortices by scanning across the aircraft flight track is evaluated using Monte Carlo lidar simulations of a simple vortex pair in both a nonturbulent and ...

Rod Frehlich; Robert Sharman

2005-02-01T23:59:59.000Z

280

An Observational Study of the Final Breakdown of the Southern Hemisphere Stratospheric Vortex in 2002  

Science Conference Proceedings (OSTI)

The 2002 Southern Hemisphere final warming occurred early, following an unusually active winter and the first recorded major warming in the Antarctic. The breakdown of the stratospheric polar vortex in October and November 2002 is examined using ...

Yvan J. Orsolini; Cora E. Randall; Gloria L. Manney; Douglas R. Allen

2005-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "vortex tube project" 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

A Subtropical Oceanic Mesoscale Convective Vortex Observed during SoWMEX/TiMREX  

Science Conference Proceedings (OSTI)

This study examines a subtropical oceanic mesoscale convective vortex (MCV) that occurred from 1800 UTC 4 June to 1200 UTC 6 June 2008 during intensive observing period (IOP) 6 of the Southwest Monsoon Experiment (SoWMEX) and the Terrain-...

Hsiao-Wei Lai; Christopher A. Davis; Ben Jong-Dao Jou

2011-08-01T23:59:59.000Z

282

Enhancement of vortex induced forces and motion through surface roughness control  

SciTech Connect

Roughness is added to the surface of a bluff body in a relative motion with respect to a fluid. The amount, size, and distribution of roughness on the body surface is controlled passively or actively to modify the flow around the body and subsequently the Vortex Induced Forces and Motion (VIFM). The added roughness, when designed and implemented appropriately, affects in a predetermined way the boundary layer, the separation of the boundary layer, the level of turbulence, the wake, the drag and lift forces, and consequently the Vortex Induced Motion (VIM), and the fluid-structure interaction. The goal of surface roughness control is to increase Vortex Induced Forces and Motion. Enhancement is needed in such applications as harnessing of clean and renewable energy from ocean/river currents using the ocean energy converter VIVACE (Vortex Induced Vibration for Aquatic Clean Energy).

Bernitsas, Michael M. (Saline, MI); Raghavan, Kamaldev (Houston, TX)

2011-11-01T23:59:59.000Z

283

Project 106  

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

Single Large Format Single Large Format Tube Tester Large Format OTM Tubes Multi-tube Pilot Plant Reactor, P-1 DEVELOPMENT OF OXYGEN TRANSPORT MEMBRANE (OTM) FOR PRODUCTION AND TESTING OF SYNTHESIS GAS-DERIVED ULTRA-CLEAN FUELS Description Natural gas is an attractive feedstock for the production of ultra-clean fuels (UCF) because it is abundant and inexpensive, and can be converted into a number of sulfur free fuels including diesel, gasoline, dimethyl ether and derivatives, methanol and other oxygenates that can be used within the existing fuel distribution infrastructure. These fuels, when used neat, or when blended with petroleum based fuels, have the potential to dramatically reduce vehicle emissions from a number of propulsion systems including advanced IC (internal combustion) engines, fuel cells, and IC- fuel cell hybrids.

284

Ultra-fast framing camera tube  

DOE Patents (OSTI)

An electronic framing camera tube features focal plane image dissection and synchronized restoration of the dissected electron line images to form two-dimensional framed images. Ultra-fast framing is performed by first streaking a two-dimensional electron image across a narrow slit, thereby dissecting the two-dimensional electron image into sequential electron line images. The dissected electron line images are then restored into a framed image by a restorer deflector operated synchronously with the dissector deflector. The number of framed images on the tube's viewing screen is equal to the number of dissecting slits in the tube. The distinguishing features of this ultra-fast framing camera tube are the focal plane dissecting slits, and the synchronously-operated restorer deflector which restores the dissected electron line images into a two-dimensional framed image. The framing camera tube can produce image frames having high spatial resolution of optical events in the sub-100 picosecond range.

Kalibjian, Ralph (1051 Batavia Ave., Livermore, CA 94550)

1981-01-01T23:59:59.000Z

285

Coiled tubing flowline cuts wetlands disturbance  

Science Conference Proceedings (OSTI)

Operators in environmentally sensitive wetland areas of South Louisiana have used jointed, or stickpipe flowlines to transmit oil and gas to and from wellsites and production facilities. Recently, a new method featuring coiled tubing was introduced, using it as a recyclable gas flowline. The coiled tubing method eliminates potential environmental damage that could occur when stickpipe is used and it allows the tubing to be easily recovered and reused when the well is taken out of service. This article describes economic advantages of using coiled tubing and how its use simplified environmental constraints encountered in swamps. It is an expanded version of the authors` presentation to World Oil`s Coiled Tubing Conference, Houston, March, 1993.

Coats, E.A. [Halliburton Services, New Orleans, LA (United States); Marinello, S.A. [Colorado School of Mines, Golden, CO (United States)

1993-12-01T23:59:59.000Z

286

Vortex Lattice Structures of a Bose-Einstein Condensate in a Rotating Lattice Potential  

E-Print Network (OSTI)

We study vortex lattice structures of a trapped Bose-Einstein condensate in a rotating lattice potential by numerically solving the time-dependent Gross-Pitaevskii equation. By rotating the lattice potential, we observe the transition from the Abrikosov vortex lattice to the pinned lattice. We investigate the transition of the vortex lattice structure by changing conditions such as angular velocity, intensity, and lattice constant of the rotating lattice potential. PACS numbers: 03.75.Lm, 03.75.Kk Quantized vortices are one of the most characteristic manifestations of superfluidity associated with a Bose-Einstein condensate (BEC) in atomic gases. By rotating anisotropic trap potentials, several experimental groups observed formation of triangular Abrikosov lattices of vortices in rotating BECs 1,2,3. Microscopic mechanism of the vortex lattice formation has been extensively studied both analytically and numerically using the Gross-Pitaevskii (GP) equation for the condensate wavefunction 4,5,6,7,8,9,10,11. More recently, the vortex phase diagrams of a BEC in rotating lattice potentials have attracted theoretical attention, since one expects vortex pinning and structural phase transition of vortex lattice structures 12,13,14. Recently, a rotating lattice has been experimentally realized at JILA, makinig use of a laser beam passing through a rotating mask 12. Stimulated by the recent JILA experiment, in this paper, we study vortex lattice structures of a BEC in a rotating triangular lattice potential created by blue-detuned laser beams. We numerically solve the two-dimensional Gross-Pitaevskii (GP) equa-T. Sato, T. Ishiyama and T. Nikuni Fig. 1. Density profile (a) and Structure factor profile (b) of BEC in the lattice potential. The lattice potential geometry is triangular lattice at a/aho = 2.2 and ?/aho = 0.65. tion in a frame rotationg with anguler velocity ?: (i ? ?)¯h ??(r,t)

Toshihiro Sato; Tomohiko Ishiyama; Tetsuro Nikuni

2006-01-01T23:59:59.000Z

287

X-Ray Imaging of the Dynamic Magnetic Vortex Core Deformation  

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

X-Ray Imaging of the Dynamic Magnetic Vortex Core Deformation Print X-Ray Imaging of the Dynamic Magnetic Vortex Core Deformation Print Magnetic thin-film nanostructures can exhibit a magnetic vortex state in which the magnetization vectors lie in the film plane and curl around in a closed loop. At the very center of the vortex, a small, stable core exists where the magnetization points either up or down out of the plane. Three years ago, the discovery of an easy core reversal mechanism at the ALS not only made the possibility of using such systems as magnetic memories much more realistic, it also initiated investigation of the core switching mechanism itself. Now, a Belgian-German-ALS collaboration has used high-resolution, time-resolved, magnetic x-ray microscopy to experimentally reveal the first step of the reversal process: the dynamic deformation of the vortex core. The group also measured a critical vortex velocity above which reversal occurs. Both these observations provide the first experimental support for the postulated reversal mechanism.

288

X-Ray Imaging of the Dynamic Magnetic Vortex Core Deformation  

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

X-Ray Imaging of the Dynamic Magnetic Vortex Core Deformation Print X-Ray Imaging of the Dynamic Magnetic Vortex Core Deformation Print Magnetic thin-film nanostructures can exhibit a magnetic vortex state in which the magnetization vectors lie in the film plane and curl around in a closed loop. At the very center of the vortex, a small, stable core exists where the magnetization points either up or down out of the plane. Three years ago, the discovery of an easy core reversal mechanism at the ALS not only made the possibility of using such systems as magnetic memories much more realistic, it also initiated investigation of the core switching mechanism itself. Now, a Belgian-German-ALS collaboration has used high-resolution, time-resolved, magnetic x-ray microscopy to experimentally reveal the first step of the reversal process: the dynamic deformation of the vortex core. The group also measured a critical vortex velocity above which reversal occurs. Both these observations provide the first experimental support for the postulated reversal mechanism.

289

X-Ray Imaging of the Dynamic Magnetic Vortex Core Deformation  

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

X-Ray Imaging of the Dynamic X-Ray Imaging of the Dynamic Magnetic Vortex Core Deformation X-Ray Imaging of the Dynamic Magnetic Vortex Core Deformation Print Wednesday, 25 November 2009 00:00 Magnetic thin-film nanostructures can exhibit a magnetic vortex state in which the magnetization vectors lie in the film plane and curl around in a closed loop. At the very center of the vortex, a small, stable core exists where the magnetization points either up or down out of the plane. Three years ago, the discovery of an easy core reversal mechanism at the ALS not only made the possibility of using such systems as magnetic memories much more realistic, it also initiated investigation of the core switching mechanism itself. Now, a Belgian-German-ALS collaboration has used high-resolution, time-resolved, magnetic x-ray microscopy to experimentally reveal the first step of the reversal process: the dynamic deformation of the vortex core. The group also measured a critical vortex velocity above which reversal occurs. Both these observations provide the first experimental support for the postulated reversal mechanism.

290

X-Ray Imaging of the Dynamic Magnetic Vortex Core Deformation  

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

X-Ray Imaging of the Dynamic Magnetic Vortex Core Deformation Print X-Ray Imaging of the Dynamic Magnetic Vortex Core Deformation Print Magnetic thin-film nanostructures can exhibit a magnetic vortex state in which the magnetization vectors lie in the film plane and curl around in a closed loop. At the very center of the vortex, a small, stable core exists where the magnetization points either up or down out of the plane. Three years ago, the discovery of an easy core reversal mechanism at the ALS not only made the possibility of using such systems as magnetic memories much more realistic, it also initiated investigation of the core switching mechanism itself. Now, a Belgian-German-ALS collaboration has used high-resolution, time-resolved, magnetic x-ray microscopy to experimentally reveal the first step of the reversal process: the dynamic deformation of the vortex core. The group also measured a critical vortex velocity above which reversal occurs. Both these observations provide the first experimental support for the postulated reversal mechanism.

291

X-Ray Imaging of the Dynamic Magnetic Vortex Core Deformation  

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

X-Ray Imaging of the Dynamic Magnetic Vortex Core Deformation Print X-Ray Imaging of the Dynamic Magnetic Vortex Core Deformation Print Magnetic thin-film nanostructures can exhibit a magnetic vortex state in which the magnetization vectors lie in the film plane and curl around in a closed loop. At the very center of the vortex, a small, stable core exists where the magnetization points either up or down out of the plane. Three years ago, the discovery of an easy core reversal mechanism at the ALS not only made the possibility of using such systems as magnetic memories much more realistic, it also initiated investigation of the core switching mechanism itself. Now, a Belgian-German-ALS collaboration has used high-resolution, time-resolved, magnetic x-ray microscopy to experimentally reveal the first step of the reversal process: the dynamic deformation of the vortex core. The group also measured a critical vortex velocity above which reversal occurs. Both these observations provide the first experimental support for the postulated reversal mechanism.

292

X-Ray Imaging of the Dynamic Magnetic Vortex Core Deformation  

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

X-Ray Imaging of the Dynamic Magnetic Vortex Core Deformation Print X-Ray Imaging of the Dynamic Magnetic Vortex Core Deformation Print Magnetic thin-film nanostructures can exhibit a magnetic vortex state in which the magnetization vectors lie in the film plane and curl around in a closed loop. At the very center of the vortex, a small, stable core exists where the magnetization points either up or down out of the plane. Three years ago, the discovery of an easy core reversal mechanism at the ALS not only made the possibility of using such systems as magnetic memories much more realistic, it also initiated investigation of the core switching mechanism itself. Now, a Belgian-German-ALS collaboration has used high-resolution, time-resolved, magnetic x-ray microscopy to experimentally reveal the first step of the reversal process: the dynamic deformation of the vortex core. The group also measured a critical vortex velocity above which reversal occurs. Both these observations provide the first experimental support for the postulated reversal mechanism.

293

X-Ray Imaging of the Dynamic Magnetic Vortex Core Deformation  

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

X-Ray Imaging of the Dynamic Magnetic Vortex Core Deformation Print X-Ray Imaging of the Dynamic Magnetic Vortex Core Deformation Print Magnetic thin-film nanostructures can exhibit a magnetic vortex state in which the magnetization vectors lie in the film plane and curl around in a closed loop. At the very center of the vortex, a small, stable core exists where the magnetization points either up or down out of the plane. Three years ago, the discovery of an easy core reversal mechanism at the ALS not only made the possibility of using such systems as magnetic memories much more realistic, it also initiated investigation of the core switching mechanism itself. Now, a Belgian-German-ALS collaboration has used high-resolution, time-resolved, magnetic x-ray microscopy to experimentally reveal the first step of the reversal process: the dynamic deformation of the vortex core. The group also measured a critical vortex velocity above which reversal occurs. Both these observations provide the first experimental support for the postulated reversal mechanism.

294

OXIDE DISPERSION-STRENGTHENED HEAT EXCHANGER TUBING  

Science Conference Proceedings (OSTI)

Oxide dispersion strengthened (ODS) alloys (e.g. the INCOLOY{reg_sign} MA956 alloy) are known for their excellent high temperature properties and are prime candidate materials for the construction of very high temperature heat exchangers that will be used in Vision 21 power plants. The main limitation of these materials is their poor weldability. Commercially available ODS tubing also tends to exhibit relatively poor circumferential creep strength due to current processing practices resulting in a fine grain size in the transverse direction. Thus far, these two characteristics of the ODS tubing have restricted its use to mostly non-pressure containing applications. The objectives of this program are to develop: (a) an MA956 tube with sufficient circumferential creep strength for long term use as heat exchanger tubing for very high temperatures; (b) a welding technique(s) for producing adequate joints between an MA956 tube and an MA956 tube, and an MA956 tube and an INCONEL 601 tube; (c) the bending strain limits, below which recrystallization will not occur in a MA956 tube during normal operation; and (d) the high temperature corrosion limits for the MA956 alloy with respect to working-fluid side and fireside environments. Also, this program seeks to generate data for use by heat exchanger designers and the ASME Boiler and Pressure Vessel Code, and perform an analysis of the mechanical property, tube bending, and corrosion data in order to determine the implications on the design of a very high temperature heat exchanger (T>1093 C/2000 F). After one year, work is currently being conducted on increasing the circumferential strength of a MA956 tube, developing joining techniques for this material, determining the tube bending strain limits, and establishing the high temperature corrosion parameters for the MA956 alloy in environments expected to be present in Vision 21 power plants. Work in these areas will is continuing into the next fiscal year, with success anticipated to produce innovative developments that will allow the reliable use of ODS alloys for heat exchanger tubing, as well as a variety of applications previously not possible with metallic materials.

Harper, Mark A.

2001-11-06T23:59:59.000Z

295

Near-Surface Vortex Structure in a Tornado and in a Sub-Tornado-Strength, Convective-Storm Vortex Observed by a Mobile, W-Band Radar During VORTEX2  

Science Conference Proceedings (OSTI)

As part of the VORTEX2 field campaign, a very high-resolution, mobile, W-band Doppler radar collected near-surface (?200 m AGL) observations in an EF-0 tornado near Tribune, Kansas on 25 May 2010 and in sub-tornado-strength vortices near Prospect ...

Robin L. Tanamachi; Howard B. Bluestein; Ming Xue; Wen-Chau Lee; Krzysztof A. Orzel; Stephen J. Frasier; Roger M. Wakimoto

296

Coiled tubing enables rapid CO{sub 2} completions  

Science Conference Proceedings (OSTI)

In the Bravo Dome field of northeastern New Mexico, Amoco has doubled their expected carbon dioxide (CO{sub 2}) production and reduced completion costs by 7.5% using coiled tubing in conjunction with other technologies. Amoco initially expected to produce an average 2.6 MMcfd per well. Instead, six months after completing the 31-well package, the company is producing an average 5.1 MMcfd. Important elements contributing cost and time savings on the project were: Log analysis to select perforations and help prevent water production, and lost circulation; the mobility and flexibility of coiled tubing; using cement for low-cost lost circulation control; using thermoplastic film to prevent proppant flowback; fracture designs optimized for each well; and forming an alliance between Amoco and vendors and developing of mutual trust. Amoco and other producing companies use about 95% of the CO{sub 2} produced at Amoco`s Bravo Dome field for enhanced oil recovery (EOR) projects in the Permian Basin area. Amoco sells 5% of the purest product to companies in the US food industry. While the low price of CO{sub 2}, about one-fourth that of methane, furnished part of the impetus for Amoco to implement the cost-cutting methods at Bravo Dome, the methods can be applied in many completion applications and are discussed in this paper.

Payton, R.; Baker, R.; Turner, D.; Bertrand, B.

1996-08-01T23:59:59.000Z

297

Coiled tubing drilling (CTD) moves to commercial viability  

Science Conference Proceedings (OSTI)

Shell Western E and P, Inc. (SWEPI) California Drilling Operations was interested in coiled tubing (CT) for drilling slimhole steam injectors. A four-well pilot project at South Belridge field, Kern County, Calif., was targeted for immediate CT use. Well programs included completion, a goal not previously attempted on wells drilled from surface with CT. This paper reviews the primary project focus which was to develop slimhole steam injectors and improve injection profiles in lower Tulare formation E and G sands. Feasibility of drilling wells with CT and having CT crews run and cement completion tubulars in place was an issue to be determined. Conventional tubing installation is usually outside the scope of CT operations, so it was not known if this would be technically or economically feasible. Another goal was to refine personnel expertise to further develop CTD services as a successful business line. Other items targeted for investigation were: deviation control; lost circulation solutions; WOB optimization to obtain maximum ROP; potential steam blowout intervals; and high temperature. Finally, economic feasibility of using CTD as a rotary rig alternative for specific applications like slimhole wells on sites where surface location is limited was to be determined.

Romagno, R. (Shell Western E and P, Inc., Bakersfield, CA (United States)); Walker, R. (Schlumberger Dowell, Bakersfield, CA (United States))

1994-12-01T23:59:59.000Z

298

Plasma Sprayed Ni-Al Coatings for Safe Ending Heat Exchanger Tubes  

DOE Green Energy (OSTI)

Brookhaven National Laboratory (BNL) has developed thermally conductive composite liners for corrosion and scale protection in heat exchanger tubes exposed to geothermal brine. The liners cannot withstand roller expansion to connect the tubes to the tubesheet. It is not possible to line the ends of the tubes with the same material after roller expansion due to the nature of the current liner application process. It was requested that BNL evaluate plasma sprayed Ni-Al coatings for safe ending heat exchanger tubes exposed to geothermal brine. The tubes of interest had an internal diameter of 0.875 inches. It is not typical to thermal spray small diameter components or use such small standoff distances. In this project a nozzle extension was developed by Zatorski Coating Company to spray the tube ends as well as flat coupons for testing. Four different Ni-Al coatings were investigated. One of these was a ductilized Ni-AlB material developed at Oak Ridge National Laboratory. The coatings were examined by optical and scanning electron microscopy. In addition, the coatings were analyzed by X-ray diffraction and subjected to corrosion, tensile adhesion, microhardness and field tests in a volcanic pool in New Zealand.

Allen, M.L.; Berndt, C.C.; Otterson, D.

1998-11-01T23:59:59.000Z

299

Nondestructive Evaluation: Electromagnetic NDE for Ferritic and Duplex Tubing  

Science Conference Proceedings (OSTI)

With new and replacement heat exchanger designs incorporating alternative ferritic and duplex stainless steel tubing, inspection techniques must remain current and viable to allow reliable flaw detection and sizing of tubing flaws found in both tube free spans and in the vicinity of tube support plates. To approach this inspection challenge, tube material properties of more common tubing types used in the field, such as Sea-Cure, 439 stainless, and 2205 duplex, were determined. This was followed by ...

2012-11-15T23:59:59.000Z

300

Gastrostomy Tube Placement Without Nasogastric Tube: A Retrospective Evaluation in 85 Patients  

SciTech Connect

Purpose: Our study evaluated techniques for percutaneous gastrostomy (G)-tube placement without the use of a nasogastric (NG) tube. Instead, direct puncture of a physiologic air bubble or effervescent-enhanced gastric bubble distention was performed in patients with upper digestive tract obstruction (UDTO) or psychological objections to NG tubes. Materials and Methods: A total of 886 patients underwent G-tube placement in our department during a period of 7 years. We present our series of 85 (9.6%) consecutive patients who underwent percutaneous G-tube placement without use of an NG tube. Results: Of these 85 patients, fluoroscopic guided access was attempted by direct puncture of a physiologically present gastric air bubble in 24 (28%) cases. Puncture of an effervescent-induced large gastric air bubble was performed in 61 (72%) patients. Altogether, 82 (97%) of 85 G tubes were successfully placed in this fashion. The three failures comprised refusal of effervescent, vomiting of effervescent, and one initial tube misplacement when a deviation from our standard technique occurred. Conclusion: The described techniques compare favorably with published large series on G-tube placement with an NG tube in place. The techniques are especially suited for patients with UDTO due to head, neck, or esophageal malignancies, but they should be considered as an alternative in all patients. Direct puncture of effervescent-enhanced gastric bubble distention is a safe, patient-friendly and effective technique.

Heberlein, Wolf E., E-mail: weheberlein@uams.edu; Goodwin, Whitney J.; Wood, Clint E.; Yousaf, Muhammad; Culp, William C. [University of Arkansas for Medical Sciences, Department of Radiology (United States)

2012-12-15T23:59:59.000Z

Note: This page contains sample records for the topic "vortex tube project" 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

Scintillation probe with photomultiplier tube saturation indicator  

SciTech Connect

A photomultiplier tube saturation indicator is formed by supplying a supplemental light source, typically an light emitting diode (LED), adjacent to the photomultiplier tube. A switch allows the light source to be activated. The light is forwarded to the photomultiplier tube by an optical fiber. If the probe is properly light tight, then a meter attached to the indicator will register the light from the LED. If the probe is no longer light tight, and the saturation indicator is saturated, no signal will be registered when the LED is activated. 2 figs.

Ruch, J.F.; Urban, D.J.

1996-10-01T23:59:59.000Z

302

On the history of photomultiplier tube invention  

E-Print Network (OSTI)

In this very short note we review some historical aspects of photomultiplier tube invention. It is our tribute to the memory of great Soviet-Russian physicist and engineer Leonid Aleksandrovitch Kubetsky whose life and scientific achievements are described briefly. Particular efforts are made to shed light on a controversial issue of who invented the first photomultiplier tube. It is asserted that if to recognize L.A.Kubetsky's priority on the photomultiplier tube invention the last Beaune Conference would be held on the eve of the 75th Anniversary of that great event.

B. K. Lubsandorzhiev

2006-01-20T23:59:59.000Z

303

Coiled tubing facilitates deep underbalanced workover  

Science Conference Proceedings (OSTI)

A recent workover shows the technical capability and cost effectiveness of coiled tubing for cleaning out scale in a 22,611-ft, low pressure, high-temperature gas well. The well, operated by Chevron USA Production Co., is in the Fort Stockton Gas Unit 5-1 Gomez (Ellenburger) field, in West Texas. The development of reliable 100,000-psi minimal yield strength coiled tubing was a major factor that allowed this work to succeed. The methods demonstrated by this workover are becoming a standard for deep well cleanouts in the Gomez (Ellenburger) field. The paper describes coiled tubing advantages, well history, and implementation.

Adams, L.S. [Chevron USA Production Co., Midland, TX (United States); Overstreet, C.C. [CUDD Pressure Control Inc., Houston, TX (United States)

1997-03-31T23:59:59.000Z

304

Scintillation probe with photomultiplier tube saturation indicator  

DOE Patents (OSTI)

A photomultiplier tube saturation indicator is formed by supplying a supplemental light source, typically an light emitting diode (LED), adjacent to the photomultiplier tube. A switch allows the light source to be activated. The light is forwarded to the photomultiplier tube by an optical fiber. If the probe is properly light tight, then a meter attached to the indicator will register the light from the LED. If the probe is no longer light tight, and the saturation indicator is saturated, no signal will be registered when the LED is activated.

Ruch, Jeffrey F. (Bethel Park, PA); Urban, David J. (Glassport, PA)

1996-01-01T23:59:59.000Z

305

Starter for inductively coupled plasma tube  

DOE Patents (OSTI)

A starter assembly is provided for use with an inductively coupled plasma (ICP) tube to reliably initiate a plasma at internal pressures above about 30 microns. A conductive probe is inserted within the inductor coil about the tube and insulated from the tube shield assembly. A capacitive circuit is arranged for momentarily connecting a high voltage radio-frequency generator to the probe while simultaneously energizing the coil. When the plasma is initiated the probe is disconnected from the generator and electrically connected to the shield assembly for operation. 1 fig.

Hull, D.E.; Bieniewski, T.M.

1988-08-23T23:59:59.000Z

306

Starter for inductively coupled plasma tube  

DOE Patents (OSTI)

A starter assembly is provided for use with an inductively coupled plasma (ICP) tube to reliably initate a plasma at internal pressures above about 30 microns. A conductive probe is inserted within the inductor coil about the tube and insulated from the tube shield assembly. A capacitive circuit is arranged for momentarily connecting a high voltage radio-frequency generator to the probe while simultaneously energizing the coil. When the plasma is initiated the probe is disconnected from the generator and electrically connected to the shield assembly for operation.

Hull, Donald E. (969 Nambe Loop, Los Alamos, NM 87544); Bieniewski, Thomas M. (285 Donna Ave., Los Alamos, NM 87544)

1988-01-01T23:59:59.000Z

307

Bushing retention system for thermal medium cooling delivery tubes in a gas turbine rotor  

SciTech Connect

Bushings are provided in counterbores for wheels and spacers for supporting thermal medium cooling tubes extending axially adjacent the rim of the gas turbine rotor. The retention system includes a retaining ring disposed in a groove adjacent an end face of the bushing and which retaining ring projects radially inwardly to prevent axial movement of the bushing in one direction. The retention ring has a plurality of circumferentially spaced tabs along its inner diameter whereby the ring is supported by the lands of the tube maintaining its bushing retention function, notwithstanding operation in high centrifugal fields and rotation of the ring in the groove into other circular orientations.

Mashey, Thomas Charles (Coxsackie, NY)

2002-01-01T23:59:59.000Z

308

Forced-convection condensation inside tubes  

E-Print Network (OSTI)

High vapor velocity condensation inside a tube was studied analytically. The von Karman universal velocity distribution was applied to the condensate flow, pressure drops were calculated using the Lockhart- Martinelli ...

Traviss, Donald P.

1971-01-01T23:59:59.000Z

309

Sample inlet tube for ion source  

DOE Patents (OSTI)

An improved inlet tube is positioned within an aperture through the device to allow the passage of ions from the ion source, through the improved inlet tube, and into the interior of the device. The inlet tube is designed with a larger end and a smaller end wherein the larger end has a larger interior diameter than the interior diameter of the smaller end. The inlet tube is positioned within the aperture such that the larger end is pointed towards the ion source, to receive ions therefrom, and the smaller end is directed towards the interior of the device, to deliver the ions thereto. Preferably, the ion source utilized in the operation of the present invention is a standard electrospray ionization source. Similarly, the present invention finds particular utility in conjunction with analytical devices such as mass spectrometers.

Prior, David [Hermiston, OR; Price, John [Richland, WA; Bruce, Jim [Oceanside, CA

2002-09-24T23:59:59.000Z

310

Frictional forces in helical buckling of tubing  

SciTech Connect

Previous analyses of helical buckling of tubing have not considered frictional forces. This paper describes the modifications to helical buckling theory necessary to include friction. The first need is a relationship between the buckling force and the casing to tubing contact force. This contact force is determined through use of the principle of virtual work. The next need is the relationship between the friction forces, the buckling force, and the geometry of the tubing helix. Differential equations are derived and solved for two cases of interest: buckling during the landing of the tubing and thermal and differential pressure loading subsequent to landing. Several example problems are examined to evaluate the relative importance of friction.

Mitchell, R.F.

1984-09-01T23:59:59.000Z

311

Science Projects  

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

Argonne Argonne Science Project Ideas! Our Science Project section provides you with sample classroom projects and experiments, online aids for learning about science, as well as ideas for Science Fair Projects. Please select any project below to continue. Also, if you have an idea for a great project or experiment that we could share, please click our Ideas page. We would love to hear from you! Science Fair Ideas Science Fair Ideas! The best ideas for science projects are learning about and investigating something in science that interests you. NEWTON has a list of Science Fair linkd that can help you find the right topic. Toothpick Bridge Web Sites Toothpick Bridge Sites! Building a toothpick bridge is a great class project for physics and engineering students. Here are some sites that we recommend to get you started!

312

Experiments on the Rijke?Tube Phenomenon  

Science Conference Proceedings (OSTI)

Experimental investigations of the Rijke?tube phenomenon have used the same basic apparatus as that used by its discoverer in 1859—an open?ended vertical pipe containing a heated gauze in its lower half. Difficulties arise when this configuration is used for quantitative tests since the standing?wave distributions of the tube and its environment interact unless elaborate precautions are taken; consequently

Melvin M. Friedlander; T. J. B. Smith; Alan Powell

1964-01-01T23:59:59.000Z

313

Electric Flux Tube in Magnetic Plasma  

E-Print Network (OSTI)

In this paper we study a methodical problem related to the magnetic scenario recently suggested and initiated by the authors \\cite{Liao_ES_mono} to understand the strongly coupled quark-gluon plasma (sQGP): the electric flux tube in monopole plasma. A macroscopic approach, interpolating between Bose condensed (dual superconductor) and classical gas medium is developed first. Then we work out a microscopic approach based on detailed quantum mechanical calculation of the monopole scattering on electric flux tube, evaluating induced currents for all partial waves. As expected, the flux tube looses its stability when particles can penetrate it: we make this condition precise by calculating the critical value for the product of the flux tube size times the particle momentum, above which the flux tube dissolves. Lattice static potentials indicate that flux tubes seem to dissolve at $T>T_{dissolution} \\approx 1.3 T_c$. Using our criterion one gets an estimate of the magnetic density $n\\approx 4.4 \\sim 6.6 fm^{-3}$ a...

Liao Jin Feng

2007-01-01T23:59:59.000Z

314

Condensation of refrigerants on vertical fluted tubes  

DOE Green Energy (OSTI)

Experiments were run to determine heat transfer performance of single vertical fluted tubes with selected fluids condensing on the outside. Working fluids included six fluorocarbons (Refrigerants 11, 21, 22, 113, 114, and 115) and a hydrocarbon (Refrigerant 600a or isobutane). The nine test tubes were of 2.54-cm (1-in.) nominal outside diameter and 1.2 m (4 ft) in length with from 0 (smooth) to 60 axial flutes. Condensing heat transfer coefficients ranged from 620 to 7900 W/m/sup 2/ . K (110 to 1400 Btu/hr . ft/sup 2/ . /sup 0/F) over the heat flux range of 2000 to 43,000 W/m/sup 2/ (920 to 13,600 Btu/hr . ft/sup 2/). All parameters are based on total condensing surface area. The data show that, for a given heat flux, a fluted tube can increase condensing coefficients up to 6.0 times smooth tube values. Further heat transfer enhancement was achieved by the use of drainage skirts on fluted tubes; these skirts effectively divided the 1.2-m (4-ft) tubes into two, four, and eight equal condensing lengths.

Combs, S.K.; Mailen, G.S.; Murphy, R.W.

1978-08-01T23:59:59.000Z

315

Increase of pinning with temperature for a single vortex line in superfluid helium  

E-Print Network (OSTI)

While vortex pinning in superconductors usually becomes weaker at higher temperatures, we find the opposite behavior for a single vortex line in superfluid 4 He. The pinning steadily increases over our entire measurement range, from 0.15Tc to over 0.5Tc. We propose Kelvin waves along the vortex as a depinning mechanism with the observed temperature behavior. PACS numbers: 67.40.Vs, 74.60.Ge Pinning sites can trap vortices in a variety of systems. In superconductors, where vortex motion leads to non-zero resistance, a vast amount of work has been devoted to preventing such motion by introducing defects. Experimental work has shown that defects comparable in size to the vortex core make effective pin centers, and that straight [1] or splayed [2] line defects can increase the pin strength. Yet the mechanisms by which vortices interact with pin sites remain unresolved. Experimentally, pinning becomes weaker as temperature increases, in accord with the general assumption that depinning

L. A. K. Donev; L. Hough; R. J. Zieve

2000-01-01T23:59:59.000Z

316

Characterization of The Dalles Dam Spillbay 6 Vortex Using Surface Entrained Sensor Fish Device: Preliminary Report  

DOE Green Energy (OSTI)

This document summarizes the pilot study to characterize The Dalles Dam Spillbay 6 vortex using a surface entrained Sensor Fish device. It was conducted by Pacific Northwest National Laboratory (PNNL) on April 13 and 14, 2006. The total spill was controlled at approximately 110 kcfs, the forebay elevation was 157.89 ft, and the discharge of Bay 6 at the tested gate opening of 14 ft was approximately 18 kcfs. The objectives of the full study are to (1) develop baseline conditions for the detailed analysis of Sensor Fish measurements by deploying Sensor Fish in different surface locations in the vortex periphery; (2) observe the entrainment pattern and extract hydraulic data of interest such as acceleration, rotation, pressure, and estimated velocity of Sensor Fish or drogues; (3) integrate the experimental results with companion computational fluid dynamics (CFD) simulations and inertial particle tracking studies. A total of 12 Sensor Fish were released in the surface at upstream edge, left edge, downstream edge, and the core of the vortex at Bay 6. Because of the high discharge, the vortex patterns at the test condition were less consistent than the patterns observed at lower discharges. Compared with the Sensor Fish released at mid-bay at Bay 6, Sensor Fish released from the surface at the vortex experienced higher pressure fluctuations, a larger percentage of severe events, and much more rapid angular velocities.

Deng, Zhiqun; Richmond, Marshall C.; Carlson, Thomas J.

2006-06-22T23:59:59.000Z

317

OTEC cold water pipe design for problems caused by vortex-excited oscillations  

DOE Green Energy (OSTI)

Vortex-excited oscillations of marine structures result in reduced fatigue life, large hydrodynamic forces and induced stresses, and sometimes lead to structural damage and to diestructive failures. The cold water pipe of an OTEC plant is nominally a bluff, flexible cylinder with a large aspect ratio (L/D = length/diameter), and is likely to be susceptible to resonant vortex-excited oscillations. The objective of this report is to survey recent results pertaining to the vortex-excited oscillations of structures in general and to consider the application of these findings to the design of the OTEC cold water pipe. Practical design calculations are given as examples throughout the various sections of the report. This report is limited in scope to the problems of vortex shedding from bluff, flexible structures in steady currents and the resulting vortex-excited oscillations. The effects of flow non-uniformities, surface roughness of the cylinder, and inclination to the incident flow are considered in addition to the case of a smooth cyliner in a uniform stream. Emphasis is placed upon design procedures, hydrodynamic coefficients applicable in practice, and the specification of structural response parameters relevant to the OTEC cold water pipe. There are important problems associated with in shedding of vortices from cylinders in waves and from the combined action of waves and currents, but these complex fluid/structure interactions are not considered in this report.

Griffin, O. M.

1980-03-14T23:59:59.000Z

318

Power Projects  

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

Power Projects Power Projects Contact SN Customers Environmental Review-NEPA Operations & Maintenance Planning & Projects Power Marketing Rates You are here: SN Home page > About SNR Power Projects Central Valley: In California's Central Valley, 18 dams create reservoirs that can store 13 million acre-feet of water. The project's 615 miles of canals irrigate an area 400 miles long and 45 miles wide--almost one third of California. Powerplants at the dams have an installed capacity of 2,099 megawatts and provide enough energy for 650,000 people. Transmission lines total about 865 circuit-miles. Washoe: This project in west-central Nevada and east-central California was designed to improve the regulation of runoff from the Truckee and Carson river systems and to provide supplemental irrigation water and drainage, as well as water for municipal, industrial and fishery use. The project's Stampede Powerplant has a maximum capacity of 4 MW.

319

The Design of an Inspection Robot for Boiler Tubes Inspection  

Science Conference Proceedings (OSTI)

A climbing robot with magnetic wheels is designed for the inspection of boiler tubes in fossil power plants, which can inspect the boiler tubes automatically. The climbing robot will move on the boiler tubes. The magnetic wheels of the robot can be move ... Keywords: boiler tubes, climbing robot, magnetic flux leakage sensor, VSC controller

Lu Xueqin; Qiu Rongfu; Liu Gang; Huang Fuzhen

2009-11-01T23:59:59.000Z

320

Examination of Kewaunee Cold Leg Steam Generator Tubes  

Science Conference Proceedings (OSTI)

Destructive and non-destructive examination of three cold leg tubes removed from Kewaunee steam generator B in 1993 revealed 18 percent-29 percent throughwall intergranular degradation in tube support crevice regions, but burst pressures were nearly the same as for non-degraded tubes. Deposit and oxide film analyses suggest that alkaline conditions existed in tube support crevice regions.

1994-07-15T23:59:59.000Z

Note: This page contains sample records for the topic "vortex tube project" 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

Alum Innovative Exploration Project Geothermal Project | Open Energy  

Open Energy Info (EERE)

Innovative Exploration Project Geothermal Project Innovative Exploration Project Geothermal Project Jump to: navigation, search Last modified on July 22, 2011. Project Title Alum Innovative Exploration Project Project Type / Topic 1 Recovery Act: Geothermal Technologies Program Project Type / Topic 2 Validation of Innovative Exploration Technologies Project Description Phase 1 exploration will consist of two parts: 1) surface and near surface investigations and 2) subsurface geophysical surveys and modeling. The first part of Phase 1 includes: a hyperspectral imaging survey (to map thermal anomalies and geothermal indicator minerals), shallow (6 ft) temperature probe measurements, and drilling of temperature gradient wells to depths of 1000 feet. In the second part of Phase 1, 2D & 3D geophysical modeling and inversion of gravity, magnetic, and magnetotelluric datasets will be used to image the subsurface. This effort will result in the creation of a 3D model composed of structural, geological, and resistivity components. The 3D model will then be combined with the temperature and seismic data to create an integrated model that will be used to prioritize drill target locations. Four geothermal wells will be drilled and geologically characterized in Phase 2. The project will use a coiled-tube rig to test this drilling technology at a geothermal field for the first time. Two slimwells and two production wells will be drilled with core collected and characterized in the target sections of each well. In Phase 3, extended flow tests will be conducted on the producible wells to confirm the geothermal resource followed by an overall assessment of the productivity of the Alum geothermal area. Finally, Phase 3 will evaluate the relative contribution of each exploration technique in reducing risk during the early stages of the geothermal project.

322

Particle seeding flow system for horizontal shock tube  

Science Conference Proceedings (OSTI)

The Extreme Fluids Team in P-23, Physics Division, studies fluid dynamics at high speeds using high resolution diagnostics. The unsteady forces on a particle driven by a shock wave are not well understood, and they are difficult to model. A horizontal shock tube (HST) is being modified to collect data about the behavior of particles accelerated by shocks. The HST has been used previously for studies of Richtmyer-Meshkov instability using Planar Laser-Induced Fluorescence (PLIF) as well as Particle Image Velocimetry (PIV), diagnostics that measure density and velocity. The purpose of our project is to design a flow system that will introduce particles into the HST. The requirements for this particle flow system (PFS) are that it be non-intrusive, be able to introduce either solid or liquid particles, have an exhaust capability, not interfere with existing diagnostics, and couple with the existing HST components. In addition, the particles must flow through the tube in a uniform way. We met these design criteria by first drawing the existing shock tube and diagnostics and doing an initial design of the ducts for the PFS. We then estimated the losses through the particle flow system from friction and researched possible fans that could be used to drive the particles. Finally, the most challenging component of the design was the coupling to the HST. If we used large inlets, the shock would lose strength as it passed by the inlet, so we designed a novel coupling inlet and outlet that minimize the losses to the shock wave. Our design was reviewed by the Extreme Fluids Team, and it is now being manufactured and built based upon our technical drawings.

Johnston, Stephen [Los Alamos National Laboratory; Garcia, Nicolas J. [Los Alamos National Laboratory; Martinez, Adam A. [Los Alamos National Laboratory; Orlicz, Gregory C. [Los Alamos National Laboratory; Prestridge, Katherine P. [Los Alamos National Laboratory

2012-08-01T23:59:59.000Z

323

Structure and Evolution of the Large-Scale Flow and an Embedded Upper-Tropospheric Cyclonic Vortex over Northeast Brazil  

Science Conference Proceedings (OSTI)

Horizontal structure and evolution of large-scale flow and an embedded synoptic-scale cyclonic vortex over northeast Brazil as separate systems and dynamical interaction between them are studied at 200 hPa. A quasi-stationary cyclonic vortex with ...

S. K. Mishra; V. B. Rao; M. A. Gan

2001-07-01T23:59:59.000Z

324

Characterization of Ringhals 3 Tube Support Plate Crevice and Tube Deposits  

Science Conference Proceedings (OSTI)

This report presents the results of a series of examinations of two tube support plate (TSP)/tube intersections from a retired Ringhals 3 steam generator. The study, which involved both nondestructive and destructive examination, yielded valuable information on TSP corrosion and crevice deposits, which will support better understanding of secondary side degradation in steam generators.

1999-03-23T23:59:59.000Z

325

Proceedings: International Conference on Boiler Tube and HRSG Tube Failures and Inspections  

Science Conference Proceedings (OSTI)

Tube failures are the leading cause of availability loss in conventional fossil plants and combined cycle/heat recovery steam generator (HRSG) plants. This conference proceedings addresses worldwide state-of-the-art practices and techniques for understanding and reducing tube failures.

2006-08-29T23:59:59.000Z

326

Vortex combustor for low NOX emissions when burning lean premixed high hydrogen content fuel  

Science Conference Proceedings (OSTI)

A trapped vortex combustor. The trapped vortex combustor is configured for receiving a lean premixed gaseous fuel and oxidant stream, where the fuel includes hydrogen gas. The trapped vortex combustor is configured to receive the lean premixed fuel and oxidant stream at a velocity which significantly exceeds combustion flame speed in a selected lean premixed fuel and oxidant mixture. The combustor is configured to operate at relatively high bulk fluid velocities while maintaining stable combustion, and low NOx emissions. The combustor is useful in gas turbines in a process of burning synfuels, as it offers the opportunity to avoid use of diluent gas to reduce combustion temperatures. The combustor also offers the possibility of avoiding the use of selected catalytic reaction units for removal of oxides of nitrogen from combustion gases exiting a gas turbine.

Steele, Robert C; Edmonds, Ryan G; Williams, Joseph T; Baldwin, Stephen P

2012-11-20T23:59:59.000Z

327

Mitigation of Wind Turbine/Vortex Interaction Using Disturbance Accommodating Control  

DOE Green Energy (OSTI)

Wind turbines, a competitive source of emission-free electricity, are being designed with diameters and hub heights approaching 100 m, to further reduce the cost of the energy they produce. At this height above the ground, the wind turbine is exposed to atmospheric phenomena such as low-level jets, gravity waves, and Kelvin-Helmholtz instabilities, which are not currently modeled in wind turbine design codes. These atmospheric phenomena can generate coherent turbulence that causes high cyclic loads on wind turbine blades. These fluctuating loads lead to fatigue damage accumulation and blade lifetime reduction. Advanced control was used to mitigate vortex-induced blade cyclic loading. A full-state feedback controller that incorporates more detailed vortex inputs achieved significantly greater blade load reduction. Blade loads attributed to vortex passage, then, can be reduced through advanced control, and further reductions appear feasible.

Hand, M. M.

2003-12-01T23:59:59.000Z

328

Vortex combustor for low NOx emissions when burning lean premixed high hydrogen content fuel  

DOE Patents (OSTI)

A trapped vortex combustor. The trapped vortex combustor is configured for receiving a lean premixed gaseous fuel and oxidant stream, where the fuel includes hydrogen gas. The trapped vortex combustor is configured to receive the lean premixed fuel and oxidant stream at a velocity which significantly exceeds combustion flame speed in a selected lean premixed fuel and oxidant mixture. The combustor is configured to operate at relatively high bulk fluid velocities while maintaining stable combustion, and low NOx emissions. The combustor is useful in gas turbines in a process of burning synfuels, as it offers the opportunity to avoid use of diluent gas to reduce combustion temperatures. The combustor also offers the possibility of avoiding the use of selected catalytic reaction units for removal of oxides of nitrogen from combustion gases exiting a gas turbine.

Steele, Robert C. (Woodinville, WA); Edmonds, Ryan G. (Renton, WA); Williams, Joseph T. (Kirkland, WA); Baldwin, Stephen P. (Winchester, MA)

2009-10-20T23:59:59.000Z

329

Design and evaluate finned tube bundles  

Science Conference Proceedings (OSTI)

Finned tube bundles are widely used in heat exchangers, air coolers, waste heat boilers and fired heaters where energy transfer occurs between clean flue gases and a fluid with a high heat-transfer coefficient. They have several advantages including compactness, low gas pressure drop and low weight for a given duty compared to bare tube bundles. Choosing a fin type, arrangement and fin configuration requires a thorough analysis and economic evaluation. The solution is not unique since it depends on material and labor costs. Surface areas vary widely in finned tube designs for the same duty and gas pressure drop. Therefore, decisions should not be based on surface area alone. Plant engineers and consultants should consider operating costs in their evaluation because they accrue year after year. Selecting a boiler based on initial costs alone is not prudent. The paper discusses heat transfer and gas pressure drop with finned tubes, determining fin efficiency and effectiveness,g as pressure drop, tube wall and fin top temperatures, an example calculation, the effect of fin configuration on design, the effect of inline versus staggered arrangements and solid versus serrated fins, and concerns with high fin-density designs.

Ganapathy, V. [ABCO Industries, Abilene, TX (United States)

1996-09-01T23:59:59.000Z

330

Project Title  

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

CCS CCS August 20-22, 2013 2 Presentation Outline * Benefits to the program * Project overall objectives * Technical status * Project summary * Conclusions and future plans 3 Benefit to the Program * Develop technologies that will support industries' ability to predict CO 2 storage capacity in geologic formations to within ±30 percent. * Develop technologies to demonstrate that 99 percent of injected CO 2 remains in the injection zones. * This research project develops a reservoir scale CO 2 plume migration model at the Sleipner project, Norway. The Sleipner project in the Norwegian North Sea is the world's first commercial scale geological carbon storage project. 4D seismic data have delineated the CO 2 plume migration history. The relatively long history and high fidelity data make

331

The U-tube sampling methodology and real-time analysis of geofluids  

Science Conference Proceedings (OSTI)

The U-tube geochemical sampling methodology, an extension of the porous cup technique proposed by Wood [1973], provides minimally contaminated aliquots of multiphase fluids from deep reservoirs and allows for accurate determination of dissolved gas composition. The initial deployment of the U-tube during the Frio Brine Pilot CO{sub 2} storage experiment, Liberty County, Texas, obtained representative samples of brine and supercritical CO{sub 2} from a depth of 1.5 km. A quadrupole mass spectrometer provided real-time analysis of dissolved gas composition. Since the initial demonstration, the U-tube has been deployed for (1) sampling of fluids down gradient of the proposed Yucca Mountain High-Level Waste Repository, Armagosa Valley, Nevada (2) acquiring fluid samples beneath permafrost in Nunuvut Territory, Canada, and (3) at a CO{sub 2} storage demonstration project within a depleted gas reservoir, Otway Basin, Victoria, Australia. The addition of in-line high-pressure pH and EC sensors allows for continuous monitoring of fluid during sample collection. Difficulties have arisen during U-tube sampling, such as blockage of sample lines from naturally occurring waxes or from freezing conditions; however, workarounds such as solvent flushing or heating have been used to address these problems. The U-tube methodology has proven to be robust, and with careful consideration of the constraints and limitations, can provide high quality geochemical samples.

Freifeld, Barry; Perkins, Ernie; Underschultz, James; Boreham, Chris

2009-03-01T23:59:59.000Z

332

Project Title  

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

1-23, 2012 1-23, 2012 2 Presentation Outline I. Benefits II. Project Overview III. Technical Status A. Background B. Results IV. Accomplishments V. Summary 3 Benefit to the Program * Program goals. - Prediction of CO 2 storage capacity. * Project benefits. - Workforce/Student Training: Support of 3 student GAs in use of multiphase flow and geochemical models simulating CO 2 injection. - Support of Missouri DGLS Sequestration Program. 4 Project Overview: Goals and Objectives Project Goals and Objectives. 1. Training graduate students in use of multi-phase flow models related to CO 2 sequestration. 2. Training graduate students in use of geochemical models to assess interaction of CO

333

Project Title  

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

Center for Coal's Center for Coal's FY10 Carbon Sequestration Peer Review February 8 - 12, 2010 2 Collaborators * Tissa Illangasekare (Colorado School of Mines) * Michael Plampin (Colorado School of Mines) * Jeri Sullivan (LANL) * Shaoping Chu (LANL) * Jacob Bauman (LANL) * Mark Porter (LANL) 3 Presentation Outline * Benefit to the program * Project overview * Project technical status * Accomplishments to date * Future Plans * Appendix 4 Benefit to the program * Program goals being addressed (2011 TPP): - Develop technologies to demonstrate that 99 percent of injected CO 2 remains in the injection zones. * Project benefit: - This project is developing system modeling capabilities that can be used to address challenges associated with infrastructure development, integration, permanence &

334

Project 364  

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

765-494-5623 lucht@purdue.edu DEVELOPMENT OF NEW OPTICAL SENSORS FOR MEASUREMENT OF MERCURY CONCENTRATIONS, SPECIATION, AND CHEMISTRY Project Description The feasibility of...

335

Project Title  

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

Test and Evaluation of Engineered Biomineralization Technology for Sealing Existing wells Project Number: FE0009599 Robin Gerlach Al Cunningham, Lee H Spangler Montana State...

336

Project Title  

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

Test and Evaluation of Test and Evaluation of Engineered Biomineralization Technology for Sealing Existing wells Project Number: FE0009599 Robin Gerlach Al Cunningham, Lee H Spangler Montana State University U.S. Department of Energy National Energy Technology Laboratory Carbon Storage R&D Project Review Meeting Developing the Technologies and Infrastructure for CCS August 20-22, 2013 Presentation Outline * Motivation & Benefit to the Program (required) * Benefit to the Program and Project Overview (required) * Background information - Project Concept (MICP) - Ureolytic Biomineralization, Biomineralization Sealing * Accomplishments to Date - Site Characterization - Site Preparation - Experimentation and Modeling - Field Deployable Injection Strategy Development * Summary

337

Project Title  

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

LBNL's Consolidated Sequestration Research Program (CSRP) Project Number FWP ESD09-056 Barry Freifeld Lawrence Berkeley National Laboratory U.S. Department of Energy National Energy Technology Laboratory Carbon Storage R&D Project Review Meeting Developing the Technologies and Infrastructure for CCS August 20-22, 2013 2 Presentation Outline * Benefits and Goals of GEO-SEQ * Technical Status - Otway Project (CO2CRC) - In Salah (BP, Sonatrach and Statoil) - Ketzin Project (GFZ, Potsdam) - Aquistore (PTRC) * Accomplishments and Summary * Future Plans 3 Benefit to the Program * Program goals being addressed: - Develop technologies to improve reservoir storage capacity estimation - Develop and validate technologies to ensure 99 percent storage permanence.

338

Project 283  

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

NJ 07039 973-535 2328 ArchieRobertson@fwc.com Sequestration ADVANCED CO 2 CYCLE POWER GENERATION Background This project will develop a conceptual power plant design...

339

Project 197  

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

will bring economic value to both the industrial customers and to the participating companies. * Complete project by June 2006. Accomplishments A ceramic membrane and seal...

340

Project Title  

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

of Energy National Energy Technology Laboratory Carbon Storage R&D Project Review Meeting Developing the Technologies and Building the Infrastructure for CCUS Pittsburgh,...

Note: This page contains sample records for the topic "vortex tube project" 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

Project Title  

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

Interdisciplinary Investigation of the CO 2 Sequestration in Depleted Shale Gas Formations Project Number DE-FE-0004731 Jennifer Wilcox, Tony Kovscek, Mark Zoback Stanford...

342

Project Title  

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

U.S. Department of Energy National Energy Technology Laboratory Carbon Storage R&D Project Review Meeting Developing the Technologies and Building the Infrastructure for...

343

Project Title  

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

* Concrete products in this project * Standard 8" concrete blocks * Standard 4' x 8' fiber-cement boards CO 2 The Goals * Maximizing carbon uptake by carbonation (at least...

344

Project Title  

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

Storage R&D Project Review Meeting Developing the Technologies and Infrastructure for CCS August 20-22, 2013 Evaluating Potential Groundwater Impacts and Natural Geochemical...

345

Project Title  

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

Infrastructure for CCS August 20-22, 2013 2 Presentation Outline * Introduction * Organization * Benefit to Program * Project Overview * Technical Status * Accomplishments to Date...

346

Project 252  

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

Stanford Global Climate Energy Project Terralog Technologies TransAlta University of Alaska Fairbanks Washington State Department of Natural Resources Western Interstate...

347

Project Title  

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

research partnership to improve the understanding of CO 2 within coal and shale reservoirs. 2 2 3 Presentation Outline * Program Goal and Benefits Statement * Project...

348

Project Title  

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

mechanistic insights 5 Project Overview: Scope of work * Task 1 - Pipeline and Casing Steel Corrosion Studies * Evaluate corrosion behavior of pipeline steels in CO 2 mixtures...

349

Project Title  

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

20-22, 2013 2 Acknowledgements * NETL * Shell * Tri-State * Trapper Mining * State of Colorado 3 Presentation Outline * Program Benefits * Project Program Goals * Technical...

350

Project Title  

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

* This project pinpoints the critical catalyst features necessary to promote carbon dioxide conversion to acrylate, validate the chemical catalysis approach, and develop an...

351

Project Title  

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

Scale CO 2 Injection and Optimization of Storage Capacity in the Southeastern United States Project Number: DE-FE0010554 George J. Koperna, Jr. Shawna Cyphers Advanced Resources...

352

Project Title  

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

Impact of CO 2 Injection on the Subsurface Microbial Community in an Illinois Basin CCS Reservoir: Integrated Student Training in Geoscience and Geomicrobiology Project Number...

353

Field Demonstraton of Existing Microhole Coiled Tubing Rig (MCTR) Technology  

SciTech Connect

The performance of an advanced Microhole Coiled Tubing Rig (MCTR) has been measured in the field during the drilling of 25 test wells in the Niobrara formation of Western Kansas and Eastern Colorado. The coiled tubing (CT) rig designed, built and operated by Advanced Drilling Technologies (ADT), was documented in its performance by GTI staff in the course of drilling wells ranging in depth from 500 to nearly 3,000 feet. Access to well sites in the Niobrara for documenting CT rig performance was provided by Rosewood Resources of Arlington, VA. The ADT CT rig was selected for field performance evaluation because it is one of the most advanced commercial CT rig designs that demonstrate a high degree of process integration and ease of set-up and operation. Employing an information collection protocol, data was collected from the ADT CT rig during 25 drilling events that encompassed a wide range of depths and drilling conditions in the Niobrara. Information collected included time-function data, selected parametric information indicating CT rig operational conditions, staffing levels, and field observations of the CT rig in each phase of operation, from rig up to rig down. The data obtained in this field evaluation indicates that the ADT CT rig exhibited excellent performance in the drilling and completion of more than 25 wells in the Niobrara under varied drilling depths and formation conditions. In the majority of the 25 project well drilling events, ROP values ranged between 300 and 620 feet per hour. For all but the lowest 2 wells, ROP values averaged approximately 400 feet per hour, representing an excellent drilling capability. Most wells of depths between 500 and 2,000 feet were drilled at a total functional rig time of less than 16 hours; for wells as deep at 2,500 to 3,000 feet, the total rig time for the CT unit is usually well under one day. About 40-55 percent of the functional rig time is divided evenly between drilling and casing/cementing. The balance of time is divided among the remaining four functions of rig up/rig down, logging, lay down bottomhole assembly, and pick up bottomhole assembly. Observations made during all phases of CT rig operation at each of the project well installations have verified a number of characteristics of the technology that represent advantages that can produce significant savings of 25-35 percent per well. Attributes of the CT rig performance include: (1) Excellent hole quality with hole deviation amounting to 1-2 degrees; (2) Reduced need for auxiliary equipment; (3) Efficient rig mobilization requiring only four trailers; (4) Capability of ''Zero Discharge'' operation; (5) Improved safety; and, (6) Measurement while drilling capability. In addition, commercial cost data indicates that the CT rig reduces drilling costs by 25 to 35% compared to conventional drilling technology. Widespread commercial use of the Microhole Coiled Tubing technology in the United States for onshore Lower-48 drilling has the potential of achieving substantially positive impacts in terms of savings to the industry and resource expansion. Successfully commercialized Microhole CT Rig Technology is projected to achieve cumulative savings in Lower-48 onshore drilling expenditures of approximately 6.8 billion dollars by 2025. The reduced cost of CT microhole drilling is projected to enable the development of gas resources that would not have been economic with conventional methods. Because of the reduced cost of drilling achieved with CT rig technology, it is estimated that an additional 22 Tcf of gas resource will become economic to develop. In the future, the Microhole Coiled Tubing Rig represents an important platform for the continued improvement of drilling that draws on a new generation of various technologies to achieve goals of improved drilling cost and reduced impact to the environment.

Kent Perry; Samih Batarseh; Sheriff Gowelly; Thomas Hayes

2006-05-09T23:59:59.000Z

354

NRELOpenStudio Tutorial Videos on YouTube  

DOE Data Explorer (OSTI)

OpenStudio is a cross-platform (Windows, Mac, and Linux) collection of software tools to support whole building energy modeling using EnergyPlus and advanced daylight analysis using Radiance. OpenStudio is an open source project to facilitate community development, extension, and private sector adoption. OpenStudio includes graphical interfaces along with a Software Development Kit (SDK) [copied from the NRELOpenStudio website at http://openstudio.nrel.gov]. It promotes open and rapid application development and can be tailored for specific audience and specific research results. In addition to the website, where software and documentation are available for download, be sure to visit the NRELOpenStudio channel on YouTube. More than 120 short videos provide training and insight into the use and applications for NRELOpenStudio. Note that an active forum for developers is also located on the website at http://openstudio.nrel.gov/forum.

355

Power Tube Inc | Open Energy Information  

Open Energy Info (EERE)

Power Tube Inc Power Tube Inc Jump to: navigation, search Name Power Tube Inc Place Houston, Texas Zip 77060 Sector Geothermal energy Product Texan geothermal systems developer. Has developed a new range of geothermal heat exchangers from biodegradable materials. Coordinates 29.76045°, -95.369784° 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":29.76045,"lon":-95.369784,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

356

Alternate Materials for Recovery Boiler Superheater Tubes  

SciTech Connect

The ever escalating demands for increased efficiency of all types of boilers would most sensibly be realized by an increase in the steam parameters of temperature and pressure. However, materials and corrosion limitations in the steam generating components, particularly the superheater tubes, present major obstacles to boiler designers in achieving systems that can operate under the more severe conditions. This paper will address the issues associated with superheater tube selection for many types of boilers; particularly chemical recovery boilers, but also addressing the similarities in issues for biomass and coal fired boilers. It will also review our recent study of materials for recovery boiler superheaters. Additional, more extensive studies, both laboratory and field, are needed to gain a better understanding of the variables that affect superheater tube corrosion and to better determine the best means to control this corrosion to ultimately permit operation of recovery boilers at higher temperatures and pressures.

Keiser, James R [ORNL; Kish, Joseph [McMaster University; Singbeil, Douglas [FPInnovations

2009-01-01T23:59:59.000Z

357

Circumferential cracking of steam generator tubes  

SciTech Connect

On April 28, 1995, the U.S. Nuclear Regulatory Commission (NRC) issued Generic Letter (GL) 95-03, {open_quote}Circumferential Cracking of Steam Generator Tubes.{close_quote} GL 95-03 was issued to obtain information needed to verify licensee compliance with existing regulatory requirements regarding the integrity of steam generator tubes in domestic pressurized-water reactors (PWRs). This report briefly describes the design and function of domestic steam generators and summarizes the staff`s assessment of the responses to GL 95-03. The report concludes with several observations related to steam generator operating experience. This report is intended to be representative of significant operating experience pertaining to circumferential cracking of steam generator tubes from April 1995 through December 1996. Operating experience prior to April 1995 is discussed throughout the report, as necessary, for completeness.

Karwoski, K.J.

1997-04-01T23:59:59.000Z

358

An explosively driven, fast shock tube  

SciTech Connect

A simple, cylindrically configured fast shock tube (FST) has been employed as a tool to investigate the hydrodynamics of plate drive under a very high impulse-loading condition. The shock tube has a high-explosive outer shell and a low-density foam core. The implosion produces a well-defined Mach disk that is then subsequently used to drive a metallic plate. A thin stainless steel (SS) plate has been successfully launched to 9 km/s with this device. The experimental results from the study of material flow will be presented and compared with numerical calculation. Various interesting measurement techniques will also be discussed.

Tan, T.H.; Marsh, S.

1992-03-01T23:59:59.000Z

359

An explosively driven, fast shock tube  

SciTech Connect

A simple, cylindrically configured fast shock tube (FST) has been employed as a tool to investigate the hydrodynamics of plate drive under a very high impulse-loading condition. The shock tube has a high-explosive outer shell and a low-density foam core. The implosion produces a well-defined Mach disk that is then subsequently used to drive a metallic plate. A thin stainless steel (SS) plate has been successfully launched to 9 km/s with this device. The experimental results from the study of material flow will be presented and compared with numerical calculation. Various interesting measurement techniques will also be discussed.

Tan, T.H.; Marsh, S.

1992-01-01T23:59:59.000Z

360

Project Title  

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

Space Geodesy, Seismology, Space Geodesy, Seismology, and Geochemistry for Monitoring Verification and Accounting of CO 2 in Sequestration Sites DE-FE0001580 Tim Dixon, University of South Florida Peter Swart, University of Miami U.S. Department of Energy National Energy Technology Laboratory Carbon Storage R&D Project Review Meeting Developing the Technologies and Building the Infrastructure for CO 2 Storage August 21-23, 2012 2 Presentation Outline * Benefit to program * Goals & objectives * Preliminary InSAR results (site selection phase) * Project location * Project installed equipment * Specific project results * Summary 3 Benefit to the Program * Focused on monitoring, verification, and accounting (MVA) * If successful, our project will demonstrate the utility of low cost, surface

Note: This page contains sample records for the topic "vortex tube project" 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

Project Title  

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

Carbon Storage R&D Project Review Meeting Carbon Storage R&D Project Review Meeting Developing the Technologies and Infrastructure for CCS August 20-22, 2013 DE-FE0001159 Advanced Technologies for Monitoring CO 2 Saturation and Pore Pressure in Geologic Formations Gary Mavko Rock Physics Project/Stanford University 2 Presentation Outline * Benefit to the Program * Project Overview * Motivating technical challenge * Approach * Technical Status - Laboratory results - Theoretical modeling * Summary Mavko: Stanford University 3 Benefit to the Program * Program goals being addressed. - Develop technologies that will support industries' ability to predict CO 2 storage capacity in geologic formations. - Develop technologies to demonstrate that 99% of injected CO 2 remains in injection zones. * Project benefits statement.

362

Project Title  

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

Large Volume Injection of CO Large Volume Injection of CO 2 to Assess Commercial Scale Geological Sequestration in Saline Formations in the Big Sky Region Project Number: DE-FC26-05NT42587 Dr. Lee Spangler Big Sky Carbon Sequestration Partnership Montana State University U.S. Department of Energy National Energy Technology Laboratory Carbon Storage R&D Project Review Meeting Developing the Technologies and Building the Infrastructure for CO 2 Storage August 21-23, 2012 2 Presentation Outline * Goals and Objectives * Project overview * Kevin Dome characteristics * Project design philosophy * Infrastructure * Modeling * Monitoring * Project Opportunities 3 Benefit to the Program Program goals being addressed. * Develop technologies that will support industries' ability to predict CO

363

Project Title  

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

and Research on Probabilistic and Research on Probabilistic Hydro-Thermo-Mechanical (HTM) Modeling of CO 2 Geological Sequestration (GS) in Fractured Porous Rocks Project DE-FE0002058 Marte Gutierrez, Ph.D. Colorado School of Mines U.S. Department of Energy National Energy Technology Laboratory Carbon Storage R&D Project Review Meeting Developing the Technologies and Building the Infrastructure for CO 2 Storage August 21-23, 2012 2 Presentation Outline * Benefit to the program (Program goals addressed and Project benefits) * Project goals and objectives * Technical status - Project tasks * Technical status - Key findings * Lessons learned * Summary - Accomplishments to date 3 Benefit to the Program * Program goals being addressed. - Develop technologies that will support industries'

364

Project Title  

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

Snøhvit CO Snøhvit CO 2 Storage Project Project Number: FWP-FEW0174 Task 4 Principal Investigators: L. Chiaramonte, *J.A. White Team Members: Y. Hao, J. Wagoner, S. Walsh Lawrence Livermore National Laboratory This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. U.S. Department of Energy National Energy Technology Laboratory Carbon Storage R&D Project Review Meeting Developing the Technologies and Building the Infrastructure for CO 2 Storage August 21-23, 2012 2 Outline * Benefit to Program * Project Goals and Objectives * Technical Status * Summary & Accomplishments * Appendix 3 Benefit to the Program * The research project is focused on mechanical

365

Project title:  

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

Project title: Roseville Elverta (RSC-ELV) OPGW Replacement Project Project title: Roseville Elverta (RSC-ELV) OPGW Replacement Project Requested By: David Young Mail Code : N1410 Phone: 916-353-4542 Date Submitted: 5/4/2011 Date Required: 5/7/2011 Description of the Project: Purpose and Need The Western Area Power Administration (Western), Sierra Nevada Region (SNR), is responsible for the operation and maintenance (O&M) of federally owned and operated transmission lines, Switchyards, and facilities throughout California. Western and Reclamation must comply with the National Electric Safety Code, Western States Coordinating Council (WECC), and internal directives for protecting human safety, the physical environment, and maintaining the reliable operation of the transmission system. There is an existing OPGW communications fiber on the transmission towers between Roseville and Elverta

366

Project Title  

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

InSalah CO InSalah CO 2 Storage Project Project Number: FWP-FEW0174 Task 2 Principal Investigator: W. McNab Team Members: L. Chiaramonte, S. Ezzedine, W. Foxall, Y. Hao, A. Ramirez, *J.A. White Lawrence Livermore National Laboratory This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. U.S. Department of Energy National Energy Technology Laboratory Carbon Storage R&D Project Review Meeting Developing the Technologies and Building the Infrastructure for CO 2 Storage August 21-23, 2012 2 Outline * Benefit to Program * Project Goals and Objectives * Technical Status * Accomplishments * Summary * Appendix 3 Benefit to the Program * The research project is combining sophisticated

367

Project Title  

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

Complexity and Choice of Complexity and Choice of Model Approaches for Practical Simulations of CO 2 Injection, Migration, Leakage, and Long- term Fate Karl W. Bandilla Princeton University U.S. Department of Energy National Energy Technology Laboratory Carbon Storage R&D Project Review Meeting Developing the Technologies and Infrastructure for CCS August 20-22, 2013 Project Number DE-FE0009563 2 Presentation Outline * Project Goals and Objectives * Project overview * Accomplishments * Summary 3 Benefit to the Program * The aim of the project is to develop criteria for the selection of the appropriate level of model complexity for CO 2 sequestration modeling at a given site. This will increase the confidence in modeling results, and reduce computational cost when appropriate.

368

Microhole High-Pressure Jet Drill for Coiled Tubing  

SciTech Connect

Tempress Small Mechanically-Assisted High-Pressure Waterjet Drilling Tool project centered on the development of a downhole intensifier (DHI) to boost the hydraulic pressure available from conventional coiled tubing to the level required for high-pressure jet erosion of rock. We reviewed two techniques for implementing this technology (1) pure high-pressure jet drilling and (2) mechanically-assisted jet drilling. Due to the difficulties associated with modifying a downhole motor for mechanically-assisted jet drilling, it was determined that the pure high-pressure jet drilling tool was the best candidate for development and commercialization. It was also determined that this tool needs to run on commingled nitrogen and water to provide adequate downhole differential pressure and to facilitate controlled pressure drilling and descaling applications in low pressure wells. The resulting Microhole jet drilling bottomhole assembly (BHA) drills a 3.625-inch diameter hole with 2-inch coil tubing. The BHA consists of a self-rotating multi-nozzle drilling head, a high-pressure rotary seal/bearing section, an intensifier and a gas separator. Commingled nitrogen and water are separated into two streams in the gas separator. The water stream is pressurized to 3 times the inlet pressure by the downhole intensifier and discharged through nozzles in the drilling head. The energy in the gas-rich stream is used to power the intensifier. Gas-rich exhaust from the intensifier is conducted to the nozzle head where it is used to shroud the jets, increasing their effective range. The prototype BHA was tested at operational pressures and flows in a test chamber and on the end of conventional coiled tubing in a test well. During instrumented runs at downhole conditions, the BHA developed downhole differential pressures of 74 MPa (11,000 psi, median) and 90 MPa (13,000 psi, peaks). The median output differential pressure was nearly 3 times the input differential pressure available from the coiled tubing. In a chamber test, the BHA delivered up to 50 kW (67 hhp) hydraulic power. The tool drilled uncertified class-G cement samples cast into casing at a rate of 0.04 to 0.17 m/min (8 to 33 ft/hr), within the range projected for this tool but slower than a conventional PDM. While the tool met most of the performance goals, reliability requires further improvement. It will be difficult for this tool, as currently configured, to compete with conventional positive displacement downhole motors for most coil tubing drill applications. Mechanical cutters on the rotating nozzle head would improve cutting. This tool can be easily adapted for well descaling operations. A variant of the Microhole jet drilling gas separator was further developed for use with positive displacement downhole motors (PDM) operating on commingled nitrogen and water. A fit-for-purpose motor gas separator was designed and yard tested within the Microhole program. Four commercial units of that design are currently involved in a 10-well field demonstration with Baker Oil Tools in Wyoming. Initial results indicate that the motor gas separators provide significant benefit.

Ken Theimer; Jack Kolle

2007-06-30T23:59:59.000Z

369

EBIS Project Status Meeting  

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

All 20 0.5 m Coils complete * 1 st of 4 2.5m coils complete (DM) * 2 nd support tube insulation nearly complete (MH) * Pushers - complete, tube cut for forming in oven (AMDM?) *...

370

Steam Generator Management Program: Effect of Eddy Current Noise on Sizing Steam Generator Tube Degradation  

Science Conference Proceedings (OSTI)

The Electric Power Research Institute’s (EPRI’s) Steam Generator Management Program (SGMP) has developed procedures and tools to assist utility engineers in understanding the probability of detection (POD) in steam generator eddy current data in the presence of noise. Under some circumstances, eddy current noise can mask flaws that should be detected and assessed for tube integrity. This project focused on the ability to accurately size crack-like indications in the presence of eddy ...

2013-11-11T23:59:59.000Z

371

NDE for Carbon Steel Heat Exchanger Tube Support Plates and Tube Fretting  

Science Conference Proceedings (OSTI)

Remote field, near field, magnetically biased eddy current, and flux leakage examination are invaluable nondestructive evaluation (NDE) methods that are used extensively to investigate integrity of ferromagnetic tubing found in heat exchangers, boilers, and moisture separator reheaters (MSR), to name a few components. Tube dimensions ranging from 0.625" (15.875mm) up to 4.00" (10.16cm) in diameter x 0.065" (1.65mm) up to 0.120" (3.04mm) wall thickness can be readily interrogated for tubing free-span degr...

2005-03-31T23:59:59.000Z

372

A method and apparatus for tube crevice detection and measurement  

DOE Patents (OSTI)

This invention relates to a method and apparatus for determining the extent of contact between an electrically conducting tube and an electrically conductive tubesheet surrounding the tube, based upon the electrical resistance of the tube and tubesheet. A constant current source is applied to the interior of the electrically conducting tube by probes and a voltmeter is connected between other probes to measure the voltage at the point of current injection, which is inversely proportional to the amount of contact between the tube and tubesheet. Namely, the higher the voltage measured by the voltmeter, the less contact between the tube and tubesheet.

Kikta, T.J.; Mitchell, R.D.

1991-01-01T23:59:59.000Z

373

Boiler Tube Internal Oxide Scale Thickness Measurement: Best Practices  

Science Conference Proceedings (OSTI)

Long-term high-temperature exposure of reheater and superheater tubes in fossil-fired steam boilers results in the growth of iron oxide scale (magnetite) on the inner tube surface. This internal oxide layer on the water side of the tube acts as a thermal insulator, reducing heat transfer through the tube wall into the internal water vapor. Over time, this insulating effect limits heat transmission into the water vapor inside the tube, which, in turn, causes chronic overheating of the tube wall. The ...

2013-12-20T23:59:59.000Z

374

Hood River Fish Habitat Project; Confederated Tribes of the Warm Springs Reservation of Oregon, Annual Report 2001-2002.  

DOE Green Energy (OSTI)

This report summarizes the project implementation and monitoring of all habitat activities that occurred over Fiscal Year 2002 (FY 02). Some of the objectives in the corresponding statement of work for this contract were not completed within FY 02. A description of the progress during FY 02 and reasoning for deviation from the original tasks and timeline are given. OBJECTIVE 1--Provide coordination of all activities, administrative oversight and assist in project implementation and monitoring activities. Administration oversight and coordination of the habitat statement of work, budget, subcontracts and personnel was provided. OBJECTIVE 2--Develop, coordinate, and implement the Hood River Fish Habitat Protection, Restoration, and Monitoring Plan. The Hood River Fish Habitat Protection, Restoration, and Monitoring Plan was completed in 2000 (Coccoli et al., 2000). This document is utilized for many purposes including: drafting the Watershed Action Plan, ranking projects for funding, and prioritizing projects to target in the future. This document was updated and revised to reflect changes to fish habitat and needs in the Hood River basin based upon other documents and actions taken in the basin. OBJECTIVE 3--Assist Middle Fork Irrigation District in developing an alternative irrigation water source on Evans Creek (Hutson pond and Evans Creek diversion), eliminating the need for irrigation diversion dams which happen to be partial fish barriers. Upon completion, this project will restore 2.5 miles of access for winter steelhead, coho salmon, and resident trout habitat. This objective was revised and included in the FY 03 Statement of Work for Project No. 1998-021-00. During FY 02 the final engineering was completed on this project. However, due to a lengthy permitting process and NMFS consultation, this project was inadvertently delayed. Project completion is expected in July 2003. OBJECTIVE 4--Assist the Farmers Irrigation District (FID) in construction and installation of a new fish screen and bypass system on the mainstem Hood River (Farmers Canal). Final engineering and design for the horizontal screen was completed during the winter of 2001. In December 2001 and January 2002, the concrete work was completed and the head gates were mounted. During the spring the secondary head level control gates were installed. In September 2002, the jersey barriers and vortex tubes were installed. These are located upstream of the old drum screen, and are the primary means of dealing with bedload and suspended load from the diversion. The screen surface was also installed in September 2002 and the system accommodated water soon after. Monitoring of these structures in regards to efficiency and possible effects to fish migration is scheduled to occur in spring 2003. The transition from the old canal to the new screen is smooth and currently does not present any problems. The old drum screen is going to remain in place until all the biological and hydrological monitoring is complete to ensure compliance and satisfaction of all agencies involved. OBJECTIVE 5--Assist the East Fork Irrigation District (EFID) in final engineering design and construction of the Central Lateral Canal upgrade and invert siphon. This objective was revised and included in the FY 03 Statement of Work for Project No. 1998-021-00. During FY 02, a significant portion of the engineering and design work was completed on the EFID Central Lateral Canal upgrade and invert siphon. There were some changes in canal alignment that required further design work and easement acquisition. Time was also spent looking for matching funds and securing a loan by the EFID. Construction initiation is now scheduled for summer 2003. OBJECTIVE 6--Modify and/or eliminate five culverts, three on Baldwin Creek, one on Graham Creek, and one on Evans Creek, which function as barriers to upstream and downstream fish migration. This objective was revised and included in the FY 03 Statement of Work for Project No. 1998-021-00. There are only two culverts on Baldwin Creek that will be eliminated

Vaivoda, Alexis

2003-11-01T23:59:59.000Z

375

Western LNG project - Project summary  

Science Conference Proceedings (OSTI)

The Western LNG Project is a major new undertaking involving the liquefaction of conventional natural gas from the Western Canadian Sedimentary Basin at a plant on the British Columbia north coast. The gas in its liquid form will be shipped to Japan for consumption by utility companies. The Project represents a new era in gas processing and marketing for the Canadian natural gas industry.

Forgues, E.L.

1984-02-01T23:59:59.000Z

376

PLASMA SPRAYED Ni-Al COATINGS FOR SAFE ENDING HEAT EXCHANGER TUBES  

DOE Green Energy (OSTI)

Brookhaven National Laboratory (BNL) has developed thermally conductive composite liners for corrosion and scale protection in heat exchanger tubes exposed to geothermal brine. The liners cannot withstand roller expansion to connect the tubes to the tubesheet. It is not possible to line the ends of the tubes with the same material after roller expansion due to the nature of the current liner application process. It was requested that BNL evaluate plasma sprayed Ni-Al coatings for safe ending heat exchanger tubes exposed to geothermal brine. The tubes of interest had an internal diameter of 0.875 inches. It is not typical to thermal spray small diameter components or use such small standoff distances. In this project a nozzle extension was developed by Zatorski Coating Company to spray the tube ends as well as flat coupons for testing. Four different Ni-Al coatings were investigated. One of these was a ductilized Ni-AIB material developed at Oak Ridge National Laboratory. The coatings were examined by optical and scanning electron microscopy. In addition, the coatings were analyzed by X-ray diffraction and subjected to corrosion, tensile adhesion, microhardness and field tests in a volcanic pool in New Zealand. It was determined that the Ni-Al coatings could be applied to a depth of two inches on the tube ends. When sprayed on flat coupons the coatings exhibited relatively high adhesion strength and microhardness. Polarization curves showed that the coating performance was variable. Measured corrosion potentials indicated that the Ni-Al coatings are active towards steel coated with thermally conductive polymers, thereby suggesting preferential corrosion. Corrosion also occurred on the coated coupons tested in the volcanic pool. This may have been exacerbated by the difficulty in applying a uniform coating to the coupon edges. The Ni-Al coatings applied to the tubes had significant porosity and did not provide adequate corrosion protection. This is associated with the short standoff distance and is not a reflection of the normal quality of plasma sprayed coatings. Even if coating porosity could be reduced, the coupling of an alloy coating to a polymer-based barrier coating in the same electrolyte is not recommended. Therefore, polymer coatings that can be field applied to the tube ends after roller expansion should be sought.

ALLAN,M.L.; OTTERSON,D.; BERNDT,C.C.

1998-11-01T23:59:59.000Z

377

Workshop Proceedings: Pitting in Steam Generator Tubing  

Science Conference Proceedings (OSTI)

A two-day workshop focused on the probable causes of steam generator pitting at two nuclear plants and on whether pitting is a low-temperature or a high-temperature phenomenon. Participants also heard descriptions of various pit-resistant metals that are suitable for tube sleeving.

1984-10-01T23:59:59.000Z

378

"Fine grain Nb tube for SRF cavities"  

SciTech Connect

Superconducting radio frequency (SRF) cavities used in charged particle linear accelerators, are currently fabricated by deep drawing niobium sheets and welding the drawn dishes together. The Nb sheet has a non-uniform microstructure, which leads to unpredictable cavity shape and surface roughness, and inconsistent "spring-back" during forming. In addition, weld zones cause hot spots during cavity operation. These factors limit linear accelerator performance and increase cavity manufacturing cost. Equal channel angular extrusion (ECAE) can be used to refine and homogenize the microstructure of Nb tube for subsequent hydroforming into SRF cavities. Careful selection of deformation and heat treatment conditions during the processing steps can give a uniform and consistent microstructure in the tube, leading to improved deformability and lower manufacturing costs. Favorable microstructures were achieved in short test samples of RRR Nb tube, which may be particularly suitable for hydroforming into SRF cavity strings. The approach demonstrated could be applicable to microstructure engineering of other tube materials including tantalum, titanium, and zirconium.

Robert E. Barber

2012-07-08T23:59:59.000Z

379

Digital radiographic systems detect boiler tube cracks  

SciTech Connect

Boiler water wall leaks have been a major cause of steam plant forced outages. But conventional nondestructive evaluation techniques have a poor track record of detecting corrosion fatigue cracking on the inside surface of the cold side of waterwall tubing. EPRI is performing field trials of a prototype direct-digital radiographic system that promises to be a game changer. 8 figs.

Walker, S. [EPRI, Charlotte, NC (United States)

2008-06-15T23:59:59.000Z

380

Project Title  

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

Leakage Mitigation Leakage Mitigation using Engineered Biomineralized Sealing Technologies Project Number: FE0004478 Robin Gerlach Al Cunningham, Lee H Spangler Montana State University U.S. Department of Energy National Energy Technology Laboratory Carbon Storage R&D Project Review Meeting Developing the Technologies and Infrastructure for CCS August 20-22, 2013 2 Presentation Outline * Motivation & Benefit to the Program (required) * Benefit to the Program and Project Overview (required) * Background Information * Accomplishments to Date - Injection strategy development (control and prediction) - Large core tests - ambient pressure - Large core tests - high pressure - Small core tests - high pressure - MCDP, permeability and porosity assessments * Progress Assessment and Summary

Note: This page contains sample records for the topic "vortex tube project" 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

Project Title  

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

CO2 Leakage Mitigation CO2 Leakage Mitigation using Engineered Biomineralized Sealing Technologies Project Number FE0004478 Lee H Spangler, Al Cunningham, Robin Gerlach Energy Research Institute Montana State University U.S. Department of Energy National Energy Technology Laboratory Carbon Storage R&D Project Review Meeting Developing the Technologies and Building the Infrastructure for CO 2 Storage August 21-23, 2012 2 Presentation Outline * Motivation * Background information * Large core tests - ambient pressure * Large core tests - high pressure 3 Benefit to the Program Program goals being addressed. Develop technologies to demonstrate that 99 percent of injected CO 2 remains in the injection zones. Project benefits statement. The Engineered Biomineralized Sealing Technologies

382

Project Title  

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

CCS CCS Project Number 49607 Christopher Harto Argonne National Laboratory U.S. Department of Energy National Energy Technology Laboratory Carbon Storage R&D Project Review Meeting Developing the Technologies and Building the Infrastructure for CO 2 Storage August 21-23, 2012 2 Benefit to the Program * Program goals being addressed. - Increased control of reservoir pressure, reduced risk of CO2 migration, and expanded formation storage capacity. * Project benefits statement. - This work supports the development of active reservoir management approaches by identifying cost effective and environmentally benign strategies for managing extracted brines (Tasks 1 + 2). - This work will help identify water related constraints on CCS deployment and provide insight into

383

Project Title  

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

of Multiphase of Multiphase Flow for Improved Injectivity and Trapping 4000.4.641.251.002 Dustin Crandall, URS PI: Grant Bromhal, NETL ORD Morgantown, West Virginia U.S. Department of Energy National Energy Technology Laboratory Carbon Storage R&D Project Review Meeting Developing the Technologies and Building the Infrastructure for CO 2 Storage August 21-23, 2012 2 Presentation Outline * Benefit to the program * Project overview * Breakdown of FY12 project tasks * Facilities and personnel * Task progress to date * Planned task successes * Tech transfer and summary 3 Benefit to the Program * Program goal being addressed - Develop technologies that will support industries' ability to predict CO

384

Project Title  

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

CCS: CCS: Life Cycle Water Consumption for Carbon Capture and Storage Project Number 49607 Christopher Harto Argonne National Laboratory U.S. Department of Energy National Energy Technology Laboratory Carbon Storage R&D Project Review Meeting Developing the Technologies and Infrastructure for CCS August 20-22, 2013 2 Benefit to the Program * Program goals being addressed. - Develop technologies to improve reservoir storage efficiency while ensuring containment effectiveness. * Project benefits statement. - This work supports the development of active reservoir management approaches by identifying cost effective and environmentally benign strategies for managing extracted brines (Tasks 1 + 2). - This work will help identify water related constraints

385

Project Title  

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

Advanced Resources International, Inc. Advanced Resources International, Inc. U.S. Department of Energy National Energy Technology Laboratory Carbon Storage R&D Project Review Meeting Developing the Technologies and Building the Infrastructure for CO 2 Storage August 21-23, 2012 2 Presentation Outline * Benefit to the Program * Project Overview * Technical Status * Accomplishments to Date * Summary * Appendix 3 Benefit to the Program * Program goal being addressed: - Develop technologies that will support industries' ability to predict CO 2 storage capacity in geologic formations to within ±30 percent. * Project benefits statement: - This research seeks to develop a set of robust mathematical modules to predict how coal and shale permeability and

386

Linear and Nonlinear Vortex Motion in an Asymmetric Balance Shallow Water Model  

Science Conference Proceedings (OSTI)

This work extends asymmetric balance (AB) theory to the beta plane (?-AB). The physical problem examined is the motion of a coherent vortex on a beta plane in a finite depth fluid in the absence of an environmental steering flow. A useful ...

Michael T. Montgomery; J. Dominique Möller; Christopher T. Nicklas

1999-03-01T23:59:59.000Z

387

The Effect of Vorticity-Profile Shape on the Instability of a Two-Dimensional Vortex  

Science Conference Proceedings (OSTI)

A simple linear numerical model is used to study the effect of the shape of the vertical vorticity profile on the stability characteristics of a two-dimensional vortex. In all cases, the basic-state vorticity is confined to an annulus. It is ...

Jerry L. Steffens

1988-01-01T23:59:59.000Z

388

Original articles: Vortex states in axially symmetric superconductors in applied magnetic field  

Science Conference Proceedings (OSTI)

We solve analytically the linearized Ginzburg-Landau (GL) equation in the presence of an uniform magnetic field with cylindrical boundary conditions. The solution of the non-linear GL equation is provided as an expansion in the basis of linearized solutions. ... Keywords: Axial magnetic field, Mesoscopic superconductivity, Nonlinear Ginzburg-Landau equation, Vortex

Andrei Ludu; Milorad V. Miloševi?; Francois M. Peeters

2012-03-01T23:59:59.000Z

389

Stability of a Two-Layer Quasigeostrophic Vortex over Axisymmetric Localized Topography  

Science Conference Proceedings (OSTI)

The stability of a quasigeostrophic vortex over a radially symmetric topographic feature (elevation or depression) in a two-layer ocean on the f plane is examined. This article’s concern is with compensated vortices, that is, those in which the ...

E. S. Benilov

2005-01-01T23:59:59.000Z

390

Indirect Combustion Noise: Experimental Investigation of the Vortex Sound Generation in a Choked  

E-Print Network (OSTI)

Indirect Combustion Noise: Experimental Investigation of the Vortex Sound Generation in a Choked-27 April 2012, Nantes, France 2315 #12;Combustion noise in gas turbines consists of direct noise related to the unsteady combustion process itself and indirect noise. As known, indirect noise is produced when entropy

Paris-Sud XI, Université de

391

Longitudinally Dependent Ozone Increase in the Antarctic Polar Vortex Revealed by Balloon and Satellite Observations  

Science Conference Proceedings (OSTI)

The horizontal structure of processes causing increases in ozone in the Antarctic polar vortex was examined using data measured in 2003 from an ozonesonde observation campaign at Syowa Station (39.6°E, 69.0°S) and from the Improved Limb ...

K. Sato; Y. Tomikawa; G. Hashida; T. Yamanouchi; H. Nakajima; T. Sugita

2009-06-01T23:59:59.000Z

392

Aging memory and glassiness of a driven vortex , Guohong Li1  

E-Print Network (OSTI)

1 Aging memory and glassiness of a driven vortex system. Xu Du1 , Guohong Li1 , Eva Y. Andrei1 , M memory, aging and nonlinear-dynamics. Glasses[1-11], interfaces[12] and fractures are some examples[13 the deviation from equilibrium. After removing the force, the system ages with time and its subsequent response

Andrei, Eva Y.

393

3D-vortex labyrinths in the near field of solid-state microchip laser  

E-Print Network (OSTI)

The spatiotemporal vortex lattices generated in high Fresnel number solid-state microchip lasers are studied in connection with Talbot phenomenon generic to spatially periodic electromagnetic fields. The spatial layout of light field is obtained via dynamical model based on Maxwell-Bloch equations for class-B laser, discrete Fox-Lee map with relaxation of inversion and static model based on superposition of copropagating Gaussian beams. The spatial patterns observed experimentally and obtained numerically are interpreted as nonlinear superposition of vortices with helicoidal phase dislocations. The usage of vortex labyrinths and Talbot lattices as optical dipole traps for neutral atoms is considered for the wavelength of trapping radiation in the range 0.98 $\\div$ 2.79 $\\mu m$. The separable optical trapping potential is mounted as a sum of array of vortex lines and additional parabolic subtrap. The factorization of macroscopic wavefunction have led to analytical solution of Gross-Pitaevski equation for ground state of ensemble of quantum particles trapped in vortex labyrinth and in spatially - periodic array of Gaussian beams.

A. Yu. Okulov

2007-01-21T23:59:59.000Z

394

Ozone Forecasts of the Stratospheric Polar Vortex–Splitting Event in September 2002  

Science Conference Proceedings (OSTI)

The Southern Hemisphere major warming event in September 2002 has led to a breakup of the vortex in the middle and higher stratosphere and to a corresponding splitting of the ozone hole. Daily 3D ozone forecasts, produced at the Royal Netherlands ...

Henk Eskes; Arjo Segers; Peter van Velthoven

2005-03-01T23:59:59.000Z

395

Genesis of the Goshen County, Wyoming, Tornado on 5 June 2009 during VORTEX2  

Science Conference Proceedings (OSTI)

The genesis of a strong and long-lived tornado observed during the second Verification of the Origins of Rotation in Tornadoes Experiment (VORTEX2) in Goshen County, Wyoming, on 5 June 2009 is studied. Mobile radar, mobile mesonet, rawinsonde, and ...

Karen Kosiba; Joshua Wurman; Yvette Richardson; Paul Markowski; Paul Robinson; James Marquis

2013-04-01T23:59:59.000Z

396

Generation and Stability of a Quasi-Permanent Vortex in the Lofoten Basin  

Science Conference Proceedings (OSTI)

In the Nordic seas the Lofoten Basin is a region of high mesoscale activity. The generation mechanism and the conditions for the stability of a quasi-permanent vortex in the center of the Lofoten Basin are studied with a high-resolution ocean ...

Armin Köhl

2007-11-01T23:59:59.000Z

397

Asymptotic and numerical analysis of an inviscid bounded vortex flow at low Mach number  

Science Conference Proceedings (OSTI)

The inviscid low Mach number compressible flow developing from a plane incompressible vortex with constant density in a bounded domain is studied. A reference solution for this model flow is obtained by two-time scale asymptotic development in the zero ... Keywords: Asymptotic development, Compressible low Mach number flow, Explicit Roe scheme, Implicit scheme, WENO and high-order-compact schemes

Anne Cadiou; Lionel Le Penven; Marc Buffat

2008-09-01T23:59:59.000Z

398

Study of a Heavy Rain Vortex Formed over the Eastern Flank of the Tibetan Plateau  

Science Conference Proceedings (OSTI)

A case of the heavy rain vortex which occurred during the period 14–15 July 1979 is studied using a limited-area mesoscale numerical model. This is a representative example of a group of warm southwest vortices that often form over the eastern ...

Bin Wang; Isidoro Orlanski

1987-07-01T23:59:59.000Z

399

The Final Warming Date of the Antarctic Polar Vortex and Influences on its Interannual Variability  

Science Conference Proceedings (OSTI)

More than 40 years of radiosonde data from two Antarctic stations are examined for changes in the date of the final stratospheric warming that occurs each year as the vortex breaks up in spring/summer. A new measure of this date is derived that ...

Joanna D. Haigh; Howard K. Roscoe

2009-11-01T23:59:59.000Z

400

The Second Verification of the Origins of Rotation in Tornadoes Experiment: VORTEX2  

Science Conference Proceedings (OSTI)

The second Verification of the Origins of Rotation in Tornadoes Experiment (VORTEX2), which had its field phases in May and June of 2009 and 2010, was designed to explore i) the physical processes of tornadogenesis, maintenance, and demise; ii) the ...

Joshua Wurman; David Dowell; Yvette Richardson; Paul Markowski; Erik Rasmussen; Donald Burgess; Louis Wicker; Howard B. Bluestein

2012-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "vortex tube project" 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

Project uses microphones to detect underwater gas leaks Published: 14 Oct 2011  

E-Print Network (OSTI)

Tube Visit us on SlideShare Log in Register Enter keywords Search Home KeyTopics Publications Projects, besuretovisit theTerms of Usefor this website. Privacy Policy Terms of Use Copyright Statement Community

Anderson, Jim

402

Transient natural convection in heated inclined tubes  

SciTech Connect

To simulate natural convection flow patterns in directionally drilled wellbores, experiments and analyses were conducted for a circular tube with length-to-diameter (L/D) ratio of 36 at angles of 0{degree}, 20{degree}, and 35{degree} from the vertical. The tube was heated at the bottom and cooled at the top, and the insulation was adjusted so that approximately one- to two-thirds of the power dissipated was transferred through the tube wall to the surroundings. An aqueous solution of polyvinyl alcohol was employed as the working fluid in order to obtain low Rayleigh numbers corresponding to conditions in geothermal wellbores. Results were primarily qualitative but were useful in providing insight into the phenomena occurring. Steady-state temperature distributions were measured for the three orientations and for several heating rates to demonstrate the effects of tube angle and Rayleigh number. transient measurements of the temperature distribution were obtained during cooling from a higher temperature without a heat source to calibrate the heat losses. With the electrical heat source, temporal data were taken during heating to examine the approach to steady state. Quasi-steady flow conditions were approached rapidly, but the overall time constant of the apparatus was of the order of one-third of a day. Predictions with the three-dimensional TEMPEST code were first tested by comparison with simple conduction analyses. Comparison with actual data showed good agreement of the predicted temperature levels for the maximum inclination, 35{degree}, and slightly poorer agreement for the other limit, a vertical tube. Trends of temperature level and Nusselt number with heating rate or Rayleigh number were reasonable, but the predicted variation of the end Nusselt number versus inclination was in the opposite direction from the experiment. 75 refs., 20 figs., 8 tabs.

McEligot, D.M. (Westinghouse Electric Corp., Middletown, RI (USA). Oceanic Div.); Denbow, D.A. (Software AG of North America, Inc., Lakewood, CO (USA)); Murphy, H.D. (Los Alamos National Lab., NM (USA))

1990-05-01T23:59:59.000Z

403

Project Title  

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

Web-based CO Web-based CO 2 Subsurface Modeling Geologic Sequestration Training and Research Project Number DE-FE0002069 Christopher Paolini San Diego State University U.S. Department of Energy National Energy Technology Laboratory Carbon Storage R&D Project Review Meeting Developing the Technologies and Building the Infrastructure for CO 2 Storage August 21-23, 2012 2 Presentation Outline * Project benefits and goals. * Web interface for simulating water-rock interaction. * Development of, and experience teaching, a new Carbon Capture and Sequestration course at San Diego State University. * Some noteworthy results of student research and training in CCS oriented geochemistry. * Status of active student geochemical and geomechancal modeling projects.

404

Project Title:  

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

Repair flowline 61-66-SX-3 Repair flowline 61-66-SX-3 DOE Code: Project Lead: Wes Riesland NEPA COMPLIANCE SURVEY # 291 Project Information Date: 3/1 1/2010 Contractor Code: Project Overview In order to repair this line it was decided to trench a line aproximately 100 feet and tie it into the line at 71-3- 1. What are the environmental sx-3. This will get us out of the old flow line which has been repaired 5-6 times. this will mitigate the chances impacts? of having spills in the future. 2. What is the legal location? This flowline runs from the well77-s-1 0 to the B-2-10 manifold.+ "/-,~?X3 3. What is the duration of the project? Approximately 10 hours(1 day) to complete 4. What major equipment will be used backhoe and operator and one hand if any (work over rig. drilling rig.

405

Project Title  

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

Co-Sequestration Co-Sequestration Studies Project Number 58159 Task 2 B. Peter McGrail Pacific Northwest National Laboratory U.S. Department of Energy National Energy Technology Laboratory Carbon Storage R&D Project Review Meeting Developing the Technologies and Building the Infrastructure for CO 2 Storage August 21-23, 2012 2 Presentation Outline * Program Focus Area and DOE Connections * Goals and Objectives * Scope of Work * Technical Discussion * Accomplishments to Date * Project Wrap-up * Appendix (Organization Chart, Gantt Chart, and Bibliography 3 Benefit to the Program * Program goals addressed: - Technology development to predict CO 2 and mixed gas storage capacity in various geologic settings - Demonstrate fate of injected mixed gases * Project benefits statement:

406

Project Title  

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

Analysis of CO 2 Exposed Wells to Predict Long Term Leakage through the Development of an Integrated Neural- Genetic Algorithm Project DE FE0009284 Boyun Guo, Ph.D. University of...

407

Project Title  

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

SUMNER SUMNER COUNTY, KANSAS Project Number DE-FE0006821 W. Lynn Watney Kansas Geological Survey Lawrence, KS U.S. Department of Energy National Energy Technology Laboratory Carbon Storage R&D Project Review Meeting Developing the Technologies and Building the Infrastructure for CO 2 Storage August 21-23, 2012 Fountainview Wednesday 8-21-12 1:10-1:35 2 Presentation Outline * Benefits to the Program * Project Overview * Technical Status * Accomplishments to Date * Summary Small Scale Field Test Wellington Field Regional Assessment of deep saline Arbuckle aquifer Acknowledgements & Disclaimer Acknowledgements * The work supported by the U.S. Department of Energy (DOE) National Energy Technology Laboratory (NETL) under Grant DE-FE0002056 and DE- FE0006821, W.L. Watney and Jason Rush, Joint PIs. Project is managed and

408

Project Title  

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

0-22, 2013 0-22, 2013 Collaborators Zhengrong Wang, Yale University Kevin Johnson, University of Hawaii 2 Presentation Outline * Program Focus Area and DOE Connections * Goals and Objectives * Scope of Work * Technical Discussion * Accomplishments to Date * Project Wrap-up * Appendix (Organization Chart, Gantt Chart, and Bibliography 3 Benefit to the Program * Program goals addressed: - Technology development to predict CO 2 storage capacity - Demonstrate fate of injected CO 2 and most common contaminants * Project benefits statement: This research project conducts modeling, laboratory studies, and pilot-scale research aimed at developing new technologies and new systems for utilization of basalt formations for long term subsurface storage of CO 2 . Findings from this project

409

Project Title  

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

behavior of shales as behavior of shales as seals and storage reservoirs for CO2 Project Number: Car Stor_FY131415 Daniel J. Soeder USDOE/NETL/ORD U.S. Department of Energy National Energy Technology Laboratory Carbon Storage R&D Project Review Meeting Developing the Technologies and Infrastructure for CCS August 20-22, 2013 2 Project Overview: Goals and Objectives * Program Goals - Support industry's ability to predict CO 2 storage capacity in geologic formations to within ±30 percent. - Develop technologies to improve reservoir storage efficiency while ensuring containment effectiveness * Project Objectives - Assess how shales behave as caprocks in contact with CO 2 under a variety of conditions - Assess the viability of depleted gas shales to serve as storage reservoirs for sequestered CO

410

Project Title  

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

CO CO 2 leakage and cap rock remediation DE-FE0001132 Runar Nygaard Missouri University of Science and Technology U.S. Department of Energy National Energy Technology Laboratory Carbon Storage R&D Project Review Meeting Developing the Technologies and Building the Infrastructure for CO 2 Storage August 21-23, 2012 Presentation Outline * Benefit to the program * Project overview * Technical status * Accomplishments to date * Summary 2 3 Benefit to the Program * Program goals being addressed. - Develop technologies to demonstrate that 99 percent of injected CO 2 remains in the injection zones. * Project benefits statement. - The project develops a coupled reservoir and geomechanical modeling approach to simulate cap rock leakage and simulate the success of remediation

411

LUCF Projects  

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

RZWR'HVLJQDQG RZWR'HVLJQDQG +RZWR'HVLJQDQG ,PSOHPHQW&DUERQ ,PSOHPHQW&DUERQ 0HDVXULQJDQG0RQLWRULQJ 0HDVXULQJDQG0RQLWRULQJ $.WLYLWLHVIRU/8&) $.WLYLWLHVIRU/8&) 3URMH.WV 3URMH.WV Sandra Brown Winrock International sbrown@winrock.org Winrock International 2 3URMH.WGHVLJQLVVXHV 3URMH.WGHVLJQLVVXHV z Baselines and additionality z Leakage z Permanence z Measuring and monitoring z Issues vary with projects in developed versus developing countries Winrock International 3 /HDNDJH /HDNDJH z Leakage is the unanticipated loss or gain in carbon benefits outside of the project's boundary as a result of the project activities-divide into two types: - Primary leakage or activity shifting outside project area - Secondary leakage or market effects due to

412

Project 265  

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

The goal of this project is to develop an on-line instrument using multi- wavelength lasers that is capable of characterizing particulate matter (PM) generated in fossil energy...

413

Project Title  

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

"Carbonsheds" as a Framework for Optimizing US CCS Pipeline Transport on a Regional to National Scale DOE-ARRA Project Number DE-FE0001943 Lincoln Pratson Nicholas School of the...

414

Project 114  

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

Prototech Company SRI International Kellogg, Brown, and Root ChevronTexaco Sd-Chemie, Inc. COST Total Project Value 20,320,372 DOENon-DOE Share 15,326,608 4,993,764...

415

Project Title  

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

of Energy National Energy Technology Laboratory Carbon Storage R&D Project Review Meeting Developing the Technologies and Building the Infrastructure for CO 2 Storage August 21-23,...

416

Project Title  

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

Technology Laboratory U.S. Department of Energy Carbon Storage R&D Project Review Meeting Developing the Technologies and Building the Infrastructure for CO 2 Storage August 21-23,...

417

Project 134  

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

Project Goal To demonstrate a "whole plant" approach using by-products from a coal-fired power plant to sequester carbon in an easily quantifiable and verifiable form. Objectives...

418

MANHATTAN PROJECT  

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

The Department of Energy traces its origins to World War II and  the Manhattan Project effort to build the first atomic bomb. As the direct descendent of the Manhattan Engineer District, the...

419

Project 310  

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

carbohydrate generated from agricultural enterprises in the U.S., such as corn wet-milling. This project is studying the production of a suite of specialty chemicals by...

420

Project Title  

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

G., 2011, Design and package of a 14CO2 field analyzer: the Global Monitor Platform (GMP). Proceedings of SPIE, v 8156, p. 81560E 17 DOE-NETL PROJECT REVIEW MEETING 08-21-2012...

Note: This page contains sample records for the topic "vortex tube project" 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

Project Title  

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

Model Complexity in Geological Carbon Model Complexity in Geological Carbon Sequestration: A Design of Experiment (DoE) & Response Surface (RS) Uncertainty Analysis Project Number: DE-FE-0009238 Mingkan Zhang 1 , Ye Zhang 1 , Peter Lichtner 2 1. Dept. of Geology & Geophysics, University of Wyoming, Laramie, Wyoming 2. OFM Research, Inc., Santa Fe, New Mexico U.S. Department of Energy National Energy Technology Laboratory Carbon Storage R&D Project Review Meeting Developing the Technologies and Infrastructure for CCS August 20-22, 2013 2 Presentation Outline * Project major goals and benefits; * Detailed project objectives & success criteria; * Accomplishments to date; * Summary of results; * Appendix (organization chart; Gantt chart; additional results). Dept. of Geology & Geophysics, University of Wyoming

422

Project Title  

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

Region Region DE-FE0001812 Brian J. McPherson University of Utah U.S. Department of Energy National Energy Technology Laboratory Carbon Storage R&D Project Review Meeting Developing the Technologies and Infrastructure for CCS August 20-22, 2013 2 Acknowledgements * NETL * Shell * Tri-State * Trapper Mining * State of Colorado 3 Presentation Outline * Program Benefits * Project / Program Goals * Technical Status: Finalizing 10-Point Protocol for CO 2 Storage Site Characterization * Key Accomplishments * Summary 4 Presentation Outline * Program Benefits * Project / Program Goals * Technical Status: Finalizing 10-Point Protocol for CO 2 Storage Site Characterization * Key Accomplishments * Summary 5 Benefit to the Program Program Goals Being Addressed by this Project

423

Project 297  

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

of this project is to utilize pure oxygen at a feed rate of less than 10% of the stoichiometric requirement in demonstrating the use of oxygen-enhanced combustion in meeting...

424

Project Title  

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

Materials Project Number DE-FE0009562 John Stormont, Mahmoud Reda Taha University of New Mexico U.S. Department of Energy National Energy Technology Laboratory Carbon Storage R&D...

425

Project Title  

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

and Research on Probabilistic Hydro-Thermo-Mechanical (HTM) Modeling of CO 2 Geological Sequestration (GS) in Fractured Porous Rocks Project DE-FE0002058 Marte Gutierrez, Ph.D....

426

Horizontal Beam Tubes - HFIR Technical Parameters | ORNL Neutron Sciences  

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

Horizontal Beam Tubes Horizontal Beam Tubes The reactor has four horizontal beam tubes that supply the neutrons to the neutron scattering instruments. Details for each beam tube and instrument can be found on the HFIR instrument page. Each of the beam tubes that supply these instruments with neutrons is described subsequently. HB-1 and HB-3 The HB-1 and HB-3 thermal neutron beam tube designs are identical except for the length. Both are situated tangential to the reactor core so that the tubes point at reflector material and do not point directly at the fuel. An internal collimator is installed at the outboard end. This collimator is fabricated out of carbon steel and is plated with nickel. The collimator provides a 2.75-in by 5.5-in. rectangular aperture. A rotary shutter is located outboard of each of these beam tubes. The

427

EOI, Electric Tube Conversion Furnaces | Y-12 National Security...  

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

Tube ... EOI, Electric Tube Conversion Furnaces B&W Y-12, LLC (hereafter known as "Y-12"; for additional company information, see the website), acting under its Prime Contract No....

428

Fouling of HVAC fin and tube heat exchangers  

E-Print Network (OSTI)

air ? air ? part ? part FPI HVAC REFERENCES Anonymous, 1987,LBNL-47668 Fouling of HVAC Fin and Tube Heat ExchangersCIEE SPONSOR. FOULING OF HVAC FIN AND TUBE HEAT EXCHANGERS

Siegel, Jeffrey; Carey, Van P.

2001-01-01T23:59:59.000Z

429

Fouling of HVAC fin and tube heat exchangers  

E-Print Network (OSTI)

Methods to Maintain Heat Exchanger Coil Cleanliness, ASHRAEof HVAC Fin and Tube Heat Exchangers Jeffrey Siegel and VanOF HVAC FIN AND TUBE HEAT EXCHANGERS Jeffrey Siegel 1,2 and

Siegel, Jeffrey; Carey, Van P.

2001-01-01T23:59:59.000Z

430

Refrigerant forced-convection condensation inside horizontal tubes  

E-Print Network (OSTI)

Condensing heat transfer rates inside a horizontal tube were investigated -for large quality changes across the tube. The proposed correlation is a modification of the work of Rohsenow, Webber and Ling [29]. The result of ...

Bae, Soonhoon

1968-01-01T23:59:59.000Z

431

Insulated laser tube structure and method of making same  

DOE Patents (OSTI)

An insulated high temperature ceramic laser tube having substantially uniform insulation along the length of the tube is disclosed having particulate ceramic insulation positioned between the outer wall of the ceramic laser tube and the inner surface of tubular ceramic fiber insulation which surrounds the ceramic laser tube. The particulate ceramic insulation is preferably a ceramic capable of sintering to the outer surface of the ceramic laser tube and to the inner surface of the tubular ceramic fiber insulation. The addition of the particulate ceramic insulation to fill all the voids between the ceramic laser tube and the fibrous ceramic insulation permits the laser tube to be operated at a substantially uniform temperature throughout the length of the laser tube.

Dittbenner, Gerald R. (4353 Findlay Way, Livermore, CA 94550)

1999-01-01T23:59:59.000Z

432

Switching a magnetic vortex by interlayer coupling in epitaxially grown Co/Cu/Py/Cu(001) trilayer disks  

SciTech Connect

Epitaxial Py/Cu/Co/Cu(001) trilayers were patterned into micron sized disks and imaged using element-specific photoemission electron microscopy. By varying the Cu spacer layer thickness, we study how the coupling between the two magnetic layers influences the formation of magnetic vortex states. We find that while the Py and Co disks form magnetic vortex domains when the interlayer coupling is ferromagnetic, the magnetic vortex domains of the Py and Co disks break into anti-parallel aligned multidomains when the interlayer coupling is antiferromagnetic. We explain this result in terms of magnetic flux closure between the Py and Co layers for the antiferromagnetic coupling case.

Wu, J.; Carlton, D.; Oelker, E.; Park, J. S.; Jin, E.; Arenholz, E.; Scholl, A.; Hwang, C.; Bokor, J.; Qiu, Z Q

2010-07-16T23:59:59.000Z

433

Development of Methods to Repair Header Stub Tube Bends  

Science Conference Proceedings (OSTI)

Repair of flow-accelerated corrosion damage in bent header stub tubes in heat recovery steam generators (HRSGs) is normally accomplished by spreading tubing pendants to gain access, cutting your way in and welding your way out, or plugging damaged tubing. The technology described in this report is being developed to enable the replacement of damaged tubing in a method that will dramatically reduce change-out time in the event of a failure.

2008-12-23T23:59:59.000Z

434

HRSG Repair Welding Technologies to Address FAC in Tube Bends  

Science Conference Proceedings (OSTI)

Tube failures that occur in heat recovery steam generators (HRSGs) are often caused by thermal stress or thermal shock associated with cyclic plant operation or by flow-accelerated corrosion. Many premature failures occur along the length of finned tubes or at attachment locations where tubes are joined to the upper or lower header. Because of current tube repair practices and limited access for welding, reoccurring failures are common.

2008-03-20T23:59:59.000Z

435

Steam Generator Management Program: Alloy 800 Steam Generator Tubing Experience  

Science Conference Proceedings (OSTI)

Nuclear grade (NG) Alloy 800 has been used for steam generator tubing since 1972 in over 50 nuclear power plants worldwide. The operational performance of this alloy has been very good, although some degradation modes have recently been observed. This report describes worldwide operating experience for Alloy 800 steam generator tubing along with differences in tubing material, plant design, and operating conditions that can affect tube degradation. The various types of plants with Alloy 800 steam generat...

2012-06-26T23:59:59.000Z

436

Evaluation of Explosive Cleaning Damage in Ferritic Boiler Tubes  

Science Conference Proceedings (OSTI)

Utilities have reported boiler tube damage after explosive cleaning to control or remove slag deposits. The damage typically consists of tube crushing, denting, microcracking, and inner diameter (ID) initiated cracking. Because the latter two might not propagate through tube wall thickness initially, these types of cracking are not commonly detected during the cleaning process. However, tube failures after the boiler resumed service have been attributed to these ID-related cracking. Many utilities have r...

2010-10-29T23:59:59.000Z

437

Failure probabilities of steam generator tubes. Annual report  

SciTech Connect

BNL's efforts focused on the following specific items; the probabilities of failure for perfect steam generator tubes, the probabilities of failure for steam generator tubes containing long axisymmetrically thinned sections, and the probabilities of failure for steam generator tubes containing finite length (relatively short) axisymmetric wastages. (auth)

Reich, M.

1975-08-01T23:59:59.000Z

438

Multifunctional robot to maintain boiler water-cooling tubes  

Science Conference Proceedings (OSTI)

A robot has been developed to maintain boiler water-cooling tubes. This robot has a double tracked moving mechanism, an ash cleaning device, a slag purging device, a tubes' thickness measurement device, a marking device, and a control system. This robot ... Keywords: Boiler maintenance, Boiler water-cooling tube, Climbing robot, Mobile robot

Xueshan Gao; Dianguo Xu; Yan Wang; Huanhuan Pan; Weimin Shen

2009-10-01T23:59:59.000Z

439

Heat transfer of finned tube bundles in crossflow  

SciTech Connect

This volume correlates findings on heat transfer and hydraulic drag of bundles of finned tubes in crossflow at Reynolds numbers from 10/sup 4/ to 10/sup 6/. These studies illustrate fin, local, and mean heat transfer coefficients; effects of geometric parameters of the fins; effect of tube location within the bundle on heat transfer and hydraulic drag; and resistance of finned tube bundles.

Stasiulevicius, J.; Skrinska, A.; Zukauskas, A.

1988-01-01T23:59:59.000Z

440

Steam Generator Management Program: Assessment of Steam Generator Tube Plugs  

Science Conference Proceedings (OSTI)

EPRI Steam Generator Management Program guidelines require that utilities perform integrity assessments of all steam generator (SG) components, including tube plugs. SG inspection outages should specifically include monitoring of degradation in tube hardware such as plugs. This report provides guidance for utility engineers to use in determining tube plug inspection requirements, including scope, technique, and periodicity.BackgroundGenerally, utilities perform ...

2013-08-28T23:59:59.000Z

Note: This page contains sample records for the topic "vortex tube project" 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

Tube cutter tool and method of use for coupon removal  

DOE Patents (OSTI)

It is well known in the art that metal tubes used in heat transfer devices are susceptible to wear, erosion and other degradations which may create weaknesses or other potential failure points. One typical prior art method to determine the cause of damage to a tube involves making a circumferential cut on the tube wall and removing the entire section of the tube having a damaged portion thereon. This method is useful where a straight length portion of the tube has been affected. However, access to more constricted areas and removal of relatively large sections of tubing is limited where the cutting procedure is performed from the interior of the tube. A tube cutter tool is insertable into a tube for cutting a coupon from a damaged site on the exterior of the tube. Prior to using the tool, the damaged site is first located from the interior of the tube using a multi-coil pancake eddy current test probe. The damage site is then marked. A fiber optic probe is used to monitor the subsequent cutting procedure which is performed using a hole saw mounted on the tube cutter tool. Prior to completion of the cutting procedure, a drill in the center of the hole saw is drilled into the coupon to hold it in place.

Nachbar, H.D.; Etten, M.P. Jr.; Kurowski, P.A.

1995-12-31T23:59:59.000Z

442

Tube skin temperature prediction of catalytic reforming unit (CRU) heaters  

Science Conference Proceedings (OSTI)

The maximum duty of reformer heaters is governed by the occurance of maximum tube skin temperature of the heaters. The value of maximum tube skin temperatures of the heaters must not exceed theirs' maximum allowable design temperature. The paper highlights ... Keywords: coke formation, finite element, simulations, tube furnance

Suzana Yusup; Nguyen Duy Vinh; Nurhayati Mellon; Abdullah Hassan

2006-10-01T23:59:59.000Z

443

Investigation of Pressure-Tube and Calandria-Tube Deformation Following a Single Channel Blockage Event in ACR-700  

E-Print Network (OSTI)

The ACR-700 is an advanced pressure-tube (PT) reactor being developed by Atomic Energy of Canada Limited (AECL). As in conventional CANDU reactors, the PTs are horizontal. Each PT is surrounded by a calandria tube (CT), ...

Buongiorno, Jacopo

444

Investigation of pressure-tube and calandria-tube deformation following a single channel blockage event in ACR-700  

E-Print Network (OSTI)

The ACR-700 is an advanced pressure-tube (PT) reactor being developed by Atomic Energy of Canada Limited (AECL). As in conventional CANDU reactors, the PTs are horizontal. Each PT is surrounded by a calandria tube (CT), ...

Gerardi, Craig Douglas

2006-01-01T23:59:59.000Z

445

Source Terms for HFIR Beam Tube Shielding Analyses, and a Complete Shielding Analysis of the HB-3 Tube  

SciTech Connect

The High Flux Isotope Reactor (HFIR) at the Oak Ridge National Laboratory is in the midst of a massive upgrade program to enhance experimental facilities. The reactor presently has four horizontal experimental beam tubes, all of which will be replaced or redesigned. The HB-2 beam tube will be enlarged to support more guide tubes, while the HB-4 beam tube will soon include a cold neutron source.

Bucholz, J.A.

2000-07-01T23:59:59.000Z

446

Helium-filled aluminum flight tubes  

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

Helium-filled aluminum flight tubes. Helium-filled aluminum flight tubes. Detector housing for the CCD camera lens, mirror, and scintillator. For more information, contact Instrument Scientist: Hassina Bilheux, bilheuxhn@ornl.gov, 865.384.9630 neutrons.ornl.gov/instruments/HFIR/factsheets/Instrument-cg1d.pdf The CG-1D beam is used for neutron imaging measurements using a white beam. Apertures (with different diameters D (pinhole geometry) are used at the entrance of the helium-filled flight path to allow L/D variation from 400 to 800. L is the distance between the aperture and the detector (where the image is produced). Samples sit on a translation/ rotation stage for alignment and tomography purposes. Detectors for CG-1D include

447

Coupled-cavity drift-tube linac  

DOE Patents (OSTI)

A coupled-cavity drift-tube linac (CCDTL) combines features of the Alvarez drift-tube linac (DTL) and the .pi.-mode coupled-cavity linac (CCL). In one embodiment, each accelerating cavity is a two-cell, 0-mode DTL. The center-to-center distance between accelerating gaps is .beta..lambda., where .lambda. is the free-space wavelength of the resonant mode. Adjacent accelerating cavities have oppositely directed electric fields, alternating in phase by 180 degrees. The chain of cavities operates in a .pi./2 structure mode so the coupling cavities are nominally unexcited. The CCDTL configuration provides an rf structure with high shunt impedance for intermediate velocity charged particles, i.e., particles with energies in the 20-200 MeV range.

Billen, James H. (Los Alamos, NM)

1996-01-01T23:59:59.000Z

448

Fission of a multiphase membrane tube  

E-Print Network (OSTI)

A common mechanism for intracellular transport is the use of controlled deformations of the membrane to create spherical or tubular buds. While the basic physical properties of homogeneous membranes are relatively well-known, the effects of inhomogeneities within membranes are very much an active field of study. Membrane domains enriched in certain lipids in particular are attracting much attention, and in this Letter we investigate the effect of such domains on the shape and fate of membrane tubes. Recent experiments have demonstrated that forced lipid phase separation can trigger tube fission, and we demonstrate how this can be understood purely from the difference in elastic constants between the domains. Moreover, the proposed model predicts timescales for fission that agree well with experimental findings.

Jean-Marc Allain; Cornelis Storm; Aurelien Roux; Martine Ben Amar; Jean-Francois Joanny

2004-04-19T23:59:59.000Z

449

Project Title  

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

Project Number (DE-FE0002056) U.S. Department of Energy National Energy Technology Laboratory Carbon Storage R&D Project Review Meeting Developing the Technologies and Infrastructure for CCS August 20-22, 2013 W. Lynn Watney & Jason Rush (Joint PIs) Kansas Geological Survey Lawrence, KS 66047 Brighton 1&2 2:40 August 20, 2013 2 Presentation Outline * Benefits to the Program * Project Overview * Technical Status * Accomplishments to Date * Summary ORGANIZATIONAL STRUCTURE Modeling CO 2 Sequestration in Saline A quifer and Depleted Oil Reservoir to Evaluate Regional CO 2 Sequestration Potential of Ozark Plateau A quifer System, South-Central Kansas Co-Principal Investigators Co-Principal Investigators Kerry D. Newell -- stratigraphy, geochemistry

450

Project Title  

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

Tracer for Tracking Permanent CO 2 Storage in Basaltic Rocks DE-FE0004847 Jennifer Hall Columbia University in the City of New York U.S. Department of Energy National Energy Technology Laboratory Carbon Storage R&D Project Review Meeting Developing the Technologies and Building the Infrastructure for CO 2 Storage August 21-23, 2012 2 Presentation Outline * Benefit to the Program * Project Overview * Technical Status * Conservative and Reactive Tracer Techniques * Accomplishments to Date * Summary 3 Benefit to the Program * The goal of the project is to develop and test novel geochemical tracer techniques for quantitative monitoring, verification and accounting of stored CO 2 . These techniques contribute to the Carbon Storage Program's

451

Project Title  

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

and Geotechnical Site and Geotechnical Site Investigations for the Design of a CO 2 Rich Flue Gas Direct Injection Facility Project Number DOE Grant FE0001833 Paul Metz Department of Mining & Geological Engineering University of Alaska Fairbanks U.S. Department of Energy National Energy Technology Laboratory Carbon Storage R&D Project Review Meeting Developing the Technologies and Building the Infrastructure for CO 2 Storage August 21-23, 2012 2 Presentation Outline * Presentation Outline * Benefit to the Program * Project Overview: Goals and Objectives * Technical Status * Accomplishments to Date * Summary * Appendix: Not Included in Presentation 3 Benefit to the Program * Carbon Storage Program Major Goals: - Develop technologies that will support industries' ability to

452

Project Title  

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

Scale CO Scale CO 2 Injection and Optimization of Storage Capacity in the Southeastern United States Project Number: DE-FE0010554 George J. Koperna, Jr. Shawna Cyphers Advanced Resources International U.S. Department of Energy National Energy Technology Laboratory Carbon Storage R&D Project Review Meeting Developing the Technologies and Infrastructure for CCS August 20-22, 2013 Presentation Outline * Program Goals * Benefits Statement * Project Overview - Goals - Objectives * Technical Status * Accomplishments to Date * Summary * Appendix USDOE/NETL Program Goals * Support industry's ability to predict CO 2 storage capacity in geologic formations to within ±30 percent. * Develop and validate technologies to ensure 99 percent storage permanence. * Develop technologies to improve reservoir storage

453

Project Title  

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

SUMNER COUNTY, KANSAS DE-FE0006821 W. Lynn Watney, Jason Rush, Joint PIs Kansas Geological Survey The University of Kansas Lawrence, KS U.S. Department of Energy National Energy Technology Laboratory Carbon Storage R&D Project Review Meeting Developing the Technologies and Infrastructure for CCS August 20-22, 2013 Brighton 1&2 Wednesday 8-21-13 1:10-1:35 2 Presentation Outline * Benefit to the Program * Project Overview * Technical Status * Accomplishments to Date * Summary 2 Small Scale Field Test Wellington Field Regional Assessment of deep saline Arbuckle aquifer Project Team DOE-NETL Contract #FE0006821 KANSAS STATE UNIVERSITY 3 L. Watney (Joint PI), J. Rush (Joint PI), J. Doveton, E. Holubnyak, M. Fazelalavi, R. Miller, D. Newell, J. Raney

454

Project Title  

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

Seal Repair Using Seal Repair Using Nanocomposite Materials Project Number DE-FE0009562 John Stormont, Mahmoud Reda Taha University of New Mexico U.S. Department of Energy National Energy Technology Laboratory Carbon Storage R&D Project Review Meeting Developing the Technologies and Infrastructure for CCS August 20-22, 2013 Ed Matteo, Thomas Dewers Sandia National Laboratories 2 Presentation Outline * Introduction and overview * Materials synthesis * Materials testing and characterization * Annular seal system testing * Numerical simulation * Summary 3 Benefit to the Program * BENEFITS STATEMENT: The project involves the development and testing of polymer-cement nanocomposites for repairing flaws in annular wellbore seals. These materials will have superior characteristics compared to conventional

455

Project Title  

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

Wyoming: MVA Techniques for Determining Gas Transport and Caprock Integrity Project Number DE-FE0002112 PIs Drs. John Kaszuba and Kenneth Sims Virginia Marcon University of Wyoming U.S. Department of Energy National Energy Technology Laboratory Carbon Storage R&D Project Review Meeting Developing the Technologies and Building the Infrastructure for CO 2 Storage August 21-23, 2012 2 Presentation Outline * Benefits to the Program * Project Overview * Technical Status - Results - Conclusions - Next Steps * Summary 3 Benefit to the Program * Program goal being addressed. - Develop technologies to demonstrate that 99 percent of injected CO 2 remains in the injection zones. - Monitoring, Verification, and Accounting (MVA). MVA technologies seek to monitor, verify, and

456

Project Title  

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

Impact of CO Impact of CO 2 Injection on the Subsurface Microbial Community in an Illinois Basin CCS Reservoir: Integrated Student Training in Geoscience and Geomicrobiology Project Number (DEFE0002421) Dr. Yiran Dong Drs. Bruce W. Fouke, Robert A. Sanford, Stephen Marshak University of Illinois-Urbana Champaign U.S. Department of Energy National Energy Technology Laboratory Carbon Storage R&D Project Review Meeting Developing the Technologies and Building the Infrastructure for CO 2 Storage August 21-23, 2012 2 Presentation Outline * Benefit to the Program * Technical status * Results and discussion * Summary * Appendix 3 Benefit to the Program This research project has developed scientific, technical and institutional collaborations for the development of

457

Project Title  

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

Mohammad Piri and Felipe Pereira Mohammad Piri and Felipe Pereira University of Wyoming U.S. Department of Energy National Energy Technology Laboratory Carbon Storage R&D Project Review Meeting Developing the Technologies and Building the Infrastructure for CO 2 Storage August 2013 2 Presentation Outline * Benefit to the Program * Project Overview * Technical Status o Experimentation: core-flooding and IFT/CA o Pore-scale modeling modeling * Accomplishments to Date * Summary University of Wyoming 3 Benefit to the Program * Program goal: o 'Develop technologies that will support industries' ability to predict CO 2 storage capacity in geologic formations to within ±30 percent.' * Benefits statement: o The research project is focused on performing reservoir conditions experiments to measure steady-state relative permeabilities,

458

Project Title  

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

Monitoring Geological CO Monitoring Geological CO 2 Sequestration using Perfluorocarbon and Stable Isotope Tracers Project Number FEAA-045 Tommy J. Phelps and David R. Cole* Oak Ridge National Laboratory Phone: 865-574-7290 email: phelpstj@ornl.gov (*The Ohio State University) U.S. Department of Energy National Energy Technology Laboratory Carbon Storage R&D Project Review Developing the Technologies and Building the Infrastructure for CO 2 Storage August 22, 2013 2 Project Overview: Goals and Objectives Goal: Develop methods to interrogate subsurface for improved CO 2 sequestration, field test characterization and MVA, demonstrate CO 2 remains in zone, and tech transfer. Objectives: 1. Assessment of injections in field. PFT gas tracers are analyzed by GC-ECD to

459

Project Homepage  

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

Middle School Home Energy Audit Middle School Home Energy Audit Project Homepage NTEP Home - Project Homepage - Teacher Homepage - Student Pages Abstract: This set of lessons provides an opportunity for midlevel students to gain a basic understanding of how energy is turned into power, how power is measured using a meter, the costs of those units and the eventual reduction of energy consumption and cost to the consumer. Introduction to Research: By conducting energy audits of their own homes and completing exercises to gain baclground information, students begin to see the importance of energy in their daily lives. By using the Internet as a research tool, students gain develop research skills as they gain knowledge for their project. They use e-mail to collaborate with energy experts and share results with other

460

Project Title  

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

Title: DEVELOPING A Title: DEVELOPING A COMPREHENSIVE RISK ASSESMENT FRAMEWORK FOR GEOLOGICAL STORAGE OF CO2 Ian Duncan University of Texas U.S. Department of Energy National Energy Technology Laboratory Carbon Storage R&D Project Review Meeting Developing the Technologies and Infrastructure for CCS August 20-22, 2013 2 Presentation Outline 1. Benefit to the Program 2. Goals and Objectives 3. Technical Status Project 4. Accomplishments to Date 5. Summary 3 Benefit to the Program The research project is developing a comprehensive understanding of the programmatic (business), and technical risks associated with CCS particularly the likelihood of leakage and its potential consequences. This contributes to the Carbon Storage Program's effort of ensuring 99 percent CO

Note: This page contains sample records for the topic "vortex tube project" 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

Project Title  

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

Carbon Storage R&D Project Review Meeting Carbon Storage R&D Project Review Meeting Developing the Technologies and Building the Infrastructure for CO 2 Storage August 21-23, 2012 2 Acknowledgments Dave Harris, Kentucky Geological Survey Dave Barnes, Western Michigan University John Rupp, Indiana Geological Survey Scott Marsteller, Schlumberger Carbon Services John McBride, Brigham Young University * Project is funded by the U.S. Department of Energy through the National Energy Technology Laboratory (NETL) and by a cost share agreement with the Illinois Department of Commerce and Economic Opportunity, Office of Coal Development through the Illinois Clean Coal Institute * ConocoPhillips: in-kind match * Western Kentucky Carbon Storage Foundation: matching funding * SeisRes 2020, Houston: VSP acquisition and processing

462

Project Title  

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

to Analyze Spatial and Temporal to Analyze Spatial and Temporal Heterogeneities in Reservoir and Seal Petrology, Mineralogy, and Geochemistry: Implications for CO 2 Sequestration Prediction, Simulation, and Monitoring Project Number DE-FE0001852 Dr. Brenda B. Bowen Purdue University (now at the University of Utah) U.S. Department of Energy National Energy Technology Laboratory Carbon Storage R&D Project Review Meeting Developing the Technologies and Building the Infrastructure for CO 2 Storage August 21-23, 2012 2 Presentation Outline * Introduction to the project * Tasks * Student training * Student research successes * Lessons learned and future plans 3 Benefit to the Program * Addresses Carbon Storage Program major goals: - Develop technologies that will support industries' ability to predict CO

463

Project Title  

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

Project Results from Simulation Project Results from Simulation Framework for Regional Geologic CO 2 Storage Infrastructure along Arches Province of Midwest United States DOE Award No. DE-FE0001034 Ohio Dept. of Dev. Grant CDO/D-10-03 U.S. Department of Energy National Energy Technology Laboratory Carbon Storage R&D Project Review Meeting August 21-23, 2012 Joel Sminchak and Neeraj Gupta Battelle Energy Systems sminchak@battelle.org, 614-424-7392 gupta@battelle.org, 614-424-3820 BUSINESS SENSITIVE 2 Presentation Outline 1. Technical Status 2. Background (CO 2 Sources, Geologic Setting) 3. Injection Well history 4. Geocellular Model Development 5. Geological Data (Geological dataset, Geostatistics) 6. Geocellular porosity/permeability model development 7. Pipeline Routing Analysis

464

Research projects  

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

Yuan » Research projects Yuan » Research projects Research projects Research Interests Scientific computing, domain decomposition methods Linear solvers for sparse matrices Computational plasma physics Grid generation techniques GPU computing Current Research PDSLin: A hybrid linear solver for large-scale highly-indefinite linear systems The Parallel Domain decomposition Schur complement based Linear solver (PDSLin), which implements a hybrid (direct and iterative) linear solver based on a non-overlapping domain decomposition technique called chur complement method, and it has two levels of parallelism: a) to solve independent subdomains in parallel and b) to apply multiple processors per subdomain. In such a framework, load imbalance and excessive communication lead to the performance bottlenecks, and several techniques are developed

465

Project Title  

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

SECARB Anthropogenic Test: SECARB Anthropogenic Test: CO 2 Capture/Transportation/Storage Project # DE-FC26-05NT42590 Jerry Hill, Southern Sates Energy Board Richard A. Esposito, Southern Company U.S. Department of Energy National Energy Technology Laboratory Carbon Storage R&D Project Review Meeting Developing the Technologies and Building the Infrastructure for CO 2 Storage August 21-23, 2012 Presentation Outline * Benefit to the Program * Project Overview * Technical Status - CO 2 Capture - CO 2 Transportation - CO 2 Storage * Accomplishments to Date * Organization Chart * Gantt Chart * Bibliography * Summary Benefit to the Program 1. Predict storage capacities within +/- 30% * Conducted high resolution reservoir characterization of the Paluxy saline formation key

466

Project Title  

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

Investigation of the CO Investigation of the CO 2 Sequestration in Depleted Shale Gas Formations Project Number DE-FE-0004731 Jennifer Wilcox, Tony Kovscek, Mark Zoback Stanford University, School of Earth Sciences U.S. Department of Energy National Energy Technology Laboratory Carbon Storage R&D Project Review Meeting Developing the Technologies and Building the Infrastructure for CO 2 Storage August 21-23, 2012 2 Outline * Project Benefits * Technical Status * Imaging at mm- to micron-scales using CT - Permeability measurements and application of the Klinkenberg effect - Molecular Dynamics simulations for permeability and viscosity estimates * Accomplishments to Date * Summary Stanford University 3 Benefit to the Program * Carbon Storage Program major goals

467

Project Title  

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

Fidelity Computational Analysis of Fidelity Computational Analysis of CO2 Trappings at Pore-scales Project Number: DE-FE0002407 Vinod Kumar (vkumar@utep.edu) & Paul Delgado (pmdelgado2@utep.edu) University of Texas at El Paso U.S. Department of Energy National Energy Technology Laboratory Carbon Storage R&D Project Review Meeting Developing the Technologies and Building the Infrastructure for CO 2 Storage August 21-23, 2012 Collaborators: Dr. C. Harris (Shell Oil Company/Imperial College), Dr. G. Bromhal (NETL), Dr. M. Ferer (WVU/NETL), Dr. D. Crandall (NETL-Ctr), and Dr. D. McIntyre (NETL). 2 Presentation Outline * Benefit to the Program * Project Overview * Technical Status - Pore-network modeling - Conductance derivation for irregular geom. - Pore-to-CFD Computations

468

Project Title  

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

Project Number (DE-FE0002056) W. Lynn Watney & Jason Rush (Joint PIs) Kansas Geological Survey Lawrence, KS 66047 U.S. Department of Energy National Energy Technology Laboratory Carbon Storage R&D Project Review Meeting Developing the Technologies and Building the Infrastructure for CO 2 Storage August 21-23, 2012 2 Presentation Outline * Benefits to the Program * Project Overview * Technical Status * Accomplishments to Date * Summary KANSAS STATE UNIVERSITY Bittersweet Energy Inc. Partners FE0002056 Devilbiss Coring Service Basic Energy Services Wellington Field Operator Industrial and Electrical Power Sources of CO 2 Southwest Kansas CO 2 -EOR Initiative Industry Partners (modeling 4 Chester/Morrowan oil fields to make CO2 ready) +drilling and seismic contractors TBN

469

Project Title  

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

MVA Tools MVA Tools Sam Clegg, Kristy Nowak-Lovato, Ron Martinez, Julianna Fessenden, Thom Rahn, & Lianjie Huang Los Alamos National Laboratory U.S. Department of Energy National Energy Technology Laboratory Carbon Storage R&D Project Review Meeting Developing the Technologies and Infrastructure for CCS August 20-22, 2013 2 Presentation Outline * Benefit to the Program * Project Overview - Goals and Objectives * Technical Status * Accomplishments to Date * Summary * Appendix - Organization Chart - Bibliography 3 Project Overview: Goals and Objectives * Surface MVA - Frequency Modulated Spectroscopy - Quantitatively identify CO2, H2S and CH4 seepage from geologic sequestration sites - Distinguish anthropogenic CO2 from natural CO2 emissions * CO2 carbon stable isotope measurements

470

Fermilab Science Videos on YouTube  

DOE Data Explorer (OSTI)

Fermilab joined YouTube in November of 2006. The videos are organized into four playlists, including videos about the search for the Higgs Boson and a playlist called "Neutrino Stories." These videos are freely available to the public for viewing and can be interactively shared or commented on. Users can subscribe and be notified when new videos are posted to their specific area of interest.

471

Benchmarking boiler tube failures - Part 2  

Science Conference Proceedings (OSTI)

Part 1 of this article characterised the EUCG (formerly the Electric Utility Cost Group) Fossil Productivity Committee's study of 14 utilities with 219 baseload coal-fired steam plants (about 20% of the total number of coal plants in the USA) and their experience fighting tube leaks. Part 2 characterizes the sample of plants studied and summarises the data at the fleet level. The next study is scheduled for summer 2006. 3 figs., 2 tabs.

James Patrick; Robert Oldani; Daryl Von Behren [Ameren (United States)

2005-12-01T23:59:59.000Z

472

Project Title  

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

DE-FE0002225: DE-FE0002225: Actualistic and geochemical modeling of reservoir rock, CO 2 and formation fluid interaction, Citronelle oil field, Alabama West Virginia University & University of Alabama Presenter: Dr. Amy Weislogel (WVU) Co-PI: Dr. Rona Donahoe (UA) U.S. Department of Energy National Energy Technology Laboratory Carbon Storage R&D Project Review Meeting Developing the Technologies and Building the Infrastructure for CO 2 Storage August 21-23, 2012 2 Presentation Outline * Benefits * Overview & Project Map * Reservoir Geochemical Characterization * Formation Fluid Geochemistry * Geochemical Modeling * Summary 3 Benefit to the Program * Develop technologies that will support industries'

473

Project Title  

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

U.S. Department of Energy National Energy Technology Laboratory Carbon Storage R&D Project Review Meeting Developing the Technologies and Building the Infrastructure for CO 2 Storage August 21-23, 2012 BROWN 2 Presentation Outline * Benefits & overview of deriving acrylates from coupling carbon dioxide and ethylene * Chemical catalysis approach: background and battles left to fight * Experimental assessment of the viability of thermochemical acrylate production * Perspectives for the future BROWN 3 Benefit to the Program * This project identifies the critical catalyst features necessary to promote carbon dioxide coupling with ethylene to acrylate at molybdenum catalysts. This research demonstrates the viability of acrylate production

474

Project Title  

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

3 3 Proof-of-Feasibility of Using Wellbore Deformation as a Diagnostic Tool to Improve CO2 Sequestration DE FE0004542 Larry Murdoch, Clemson University Stephen Moysey, Clemson University Leonid Germanovich, Georgia Tech Cem Ozan, Baker Hughes Sihyun Kim, Georgia Tech Glenn Skawski, Clemson University Alex Hanna, Clemson University Johnathan Ebenhack, Clemson University Josh Smith, Clemson University U.S. Department of Energy National Energy Technology Laboratory Carbon Storage R&D Project Review Meeting Developing the Technologies and Infrastructure for CCS August 20-22, 2013 Proof-of-Feasibility of Using Wellbore Deformation as a Diagnostic Tool, Larry Murdoch Project Review Meeting, 23 Aug. 2013 2 Presentation Outline * Preliminaries

475

Hallmark Project  

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

Project Project Commercialization of the Secure SCADA Communications Protocol, a cryptographic security solution for device-to-device communication Increased connectivity and automation in the control systems that manage the nation's energy infrastructure have improved system functionality, but left systems more vulnerable to cyber attack. Intruders could severely disrupt control system operation by sending fabricated information or commands to control system devices. To ensure message integrity, supervisory control and data acquisition (SCADA) systems require a method to validate device-to- device communication and verify that information has come from a trusted source and not been altered in transit. The Secure SCADA Communications Protocol (SSCP) provides message

476

Project Title  

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

DE-FE0001836: DE-FE0001836: Numerical modeling of geomechanical processes related to CO 2 injection within generic reservoirs Andreas Eckert & Runar Nygaard Missouri University of Science & Technology U.S. Department of Energy National Energy Technology Laboratory Carbon Storage R&D Project Review Meeting Developing the Technologies and Building the Infrastructure for CO 2 Storage August 21-23, 2012 2 Presentation Outline * Objectives, Benefits and Outcomes * Technical status: Project summary - Teaching - Reservoir scale (Geomechanics & Fluid flow simulation) - Borehole scale (Wellbore integrity & wellbore trajectory planning) * Conclusions * Appendix 3 Benefit to the Program * Program goals being addressed. - Develop technologies that will support industries'

477

Tropical Cyclone Initialization with a Spherical High-Order Filter and an Idealized Three-Dimensional Bogus Vortex  

Science Conference Proceedings (OSTI)

A tropical cyclone initialization method with an idealized three-dimensional bogus vortex of an analytic empirical formula is presented for the track and intensity prediction. The procedure in the new method consists of four steps: the separation ...

In-Hyuk Kwon; Hyeong-Bin Cheong

2010-04-01T23:59:59.000Z

478

Observations of a Terrain-Forced Mesoscale Vortex and Canyon Drainage Flows along the Front Range of Colorado  

Science Conference Proceedings (OSTI)

Observations taken during the February 1991 Atmospheric Studies in Complex Terrain (ASCOT) Winter Validation Study are used to describe the wind field associated with a terrain-forced mesoscale vortex and thermally forced canyon drainage flows ...

David H. Levinson; Robert M. Banta

1995-07-01T23:59:59.000Z

479

Convection-Allowing and Convection-Parameterizing Ensemble Forecasts of a Mesoscale Convective Vortex and Associated Severe Weather Environment  

Science Conference Proceedings (OSTI)

An analysis of a regional severe weather outbreak that was related to a mesoscale convective vortex (MCV) is performed. The MCV-spawning mesoscale convection system (MCS) formed in northwest Kansas along the southern periphery of a large cutoff ...

Adam J. Clark; William A. Gallus Jr.; Ming Xue; Fanyou Kong

2010-08-01T23:59:59.000Z

480

A Spatial Filter Approach to Evaluating the Role of Convection on the Evolution of a Mesoscale Vortex  

Science Conference Proceedings (OSTI)

A new spatial filter is proposed that exploits a spectral gap in power between the convective scale and the system (“vortex”) scale during tropical cyclone (TC) genesis simulations. Using this spatial separation, this study analyzes idealized ...

Glenn A. Creighton; Robert E. Hart; Philip Cunningham

2013-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "vortex tube project" 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

Probabilistic Evaluation of the Dynamics and Predictability of the Mesoscale Convective Vortex of 10–13 June 2003  

Science Conference Proceedings (OSTI)

This study examines the dynamics and predictability of the mesoscale convective vortex (MCV) of 10–13 June 2003 through ensemble forecasting. The MCV of interest developed from a preexisting upper-level disturbance over the southwest United ...

Daniel P. Hawblitzel; Fuqing Zhang; Zhiyong Meng; Christopher A. Davis

2007-04-01T23:59:59.000Z

482

Turbulence process domination under the combined forcings of wind stress, the Langmuir vortex force, and surface cooling  

Science Conference Proceedings (OSTI)

Turbulence in the ocean surface layer is generated by time-varying combinations of destabilizing surface buoyancy flux, wind stress forcing, and wave forcing through a vortex force associated with the surface wave field. Observations of time- and ...

A. E. Gargett; C. E. Grosch

483

Observations of a Squall Line and Its Near Environment Using High-Frequency Rawinsonde Launches during VORTEX2  

Science Conference Proceedings (OSTI)

Rawinsonde data were collected before and during passage of a squall line in Oklahoma on 15 May 2009 during the Second Verification of the Origins of Rotation in Tornadoes Experiment (VORTEX2). Nine soundings were released within 3 h, allowing ...

George H. Bryan; Matthew D. Parker

2010-11-01T23:59:59.000Z

484

Contributions of the wall boundary layer to the formation of the counter-rotating vortex pair in transverse jets  

E-Print Network (OSTI)

Using high-resolution 3-D vortex simulations, this study seeks a mechanistic understanding of vorticity dynamics in transverse jets at a finite Reynolds number. A full no-slip boundary condition, rigorously formulated in ...

Schlegel, Fabrice

485

Variation in the Stratospheric Aerosol Associated with the North Cyclonic Polar Vortex as Measured by the SAM II Satellite Sensor  

Science Conference Proceedings (OSTI)

Aerosol extinction data obtained by the Stratospheric Aerosol Measurement II (SAM II) satellite instrument during the 1979/80 Northern Hemisphere winter season have been analyzed in relation to the cyclonic polar vortex. A synoptic approach has ...

G. S. Kent; C. R. Trepte; U. O. Farrukh; M. P. McCormick

1985-07-01T23:59:59.000Z

486

Recirculating wedges for metal-vapor plasma tubes  

DOE Patents (OSTI)

A metal vapor laser is disclosed that recycles condensed metal located at the terminal ends of a plasma tube back toward the center of the tube. A pair of arcuate wedges are incorporated on the bottom of the plasma tube near the terminal ends. The wedges slope downward toward the center so that condensed metal may be transported under the force of gravity away from the terminal ends. The wedges are curved to fit the plasma tube to thereby avoid forming any gaps within the tube interior. 8 figures.

Hall, J.P.; Sawvel, R.M.; Draggoo, V.G.

1994-06-28T23:59:59.000Z

487

Recirculating wedges for metal-vapor plasma tubes  

DOE Patents (OSTI)

A metal vapor laser is disclosed that recycles condensed metal located at the terminal ends of a plasma tube back toward the center of the tube. A pair of arcuate wedges are incorporated on the bottom of the plasma tube near the terminal ends. The wedges slope downward toward the center so that condensed metal may be transported under the force of gravity away from the terminal ends. The wedges are curved to fit the plasma tube to thereby avoid forming any gaps within the tube interior.

Hall, Jerome P. (Livermore, CA); Sawvel, Robert M. (Modesto, CA); Draggoo, Vaughn G. (Livermore, CA)

1994-01-01T23:59:59.000Z

488

Analysis of Steam Generator Tubing from Crystal River, Unit 3  

Science Conference Proceedings (OSTI)

Four tubes were removed from Crystal River Unit 3 steam generator B during the 1994 refueling outage (RFO 9). The tubes were examined to characterize any tube degradation associated with eddy current (EC) indications occurring at the 7th and 9th tube support plate (TSP) intersections, which were identified during RFO 8. Mechanical wear observed at the 7th and 9th TSP lands had almost no effect on the tubing's burst strength. Small patches of intergranular attack (IGA) were observed in the first freespan ...

1997-10-08T23:59:59.000Z

489

Segmented lasing tube for high temperature laser assembly  

DOE Patents (OSTI)

A high temperature laser assembly capable of withstanding operating temperatures in excess of 1500.degree. C. is described comprising a segmented cylindrical ceramic lasing tube having a plurality of cylindrical ceramic lasing tube segments of the same inner and outer diameters non-rigidly joined together in axial alignment; insulation of uniform thickness surround the walls of the ceramic lasing tube; a ceramic casing, preferably of quartz, surrounding the insulation; and a fluid cooled metal jacket surrounds the ceramic casing. In a preferred embodiment, the inner surface of each of the ceramic lasing tube segments are provided with a pair of oppositely spaced grooves in the wall thereof parallel to the center axis of the segmented cylindrical ceramic lasing tube, and both of the grooves and the center axis of the segmented cylindrical ceramic lasing tube lie in a common plane, with the grooves in each ceramic lasing tube segment in circumferential alignment with the grooves in the adjoining ceramic lasing tube segments; and one or more ceramic plates, all lying in a common plane to one another and with the central axis of the segmented ceramic lasing tube, are received in the grooves to provide additional wall area in the segmented ceramic lasing tube for collision and return to ground state of metastable metal atoms within the segmented ceramic lasing tube.

Sawicki, Richard H. (Danville, CA); Alger, Terry W. (Tracy, CA); Finucane, Raymond G. (Pleasanton, CA); Hall, Jerome P. (Livermore, CA)</