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1

Energy Flow Diagram | U.S. DOE Office of Science (SC)  

Office of Science (SC) Website

Science for Energy Flow » Energy Flow Diagram Science for Energy Flow » Energy Flow Diagram Basic Energy Sciences (BES) BES Home About Research Facilities Science Highlights Benefits of BES Funding Opportunities Basic Energy Sciences Advisory Committee (BESAC) News & Resources Program Summaries Brochures Reports Accomplishments Presentations BES and Congress Science for Energy Flow Energy Flow Diagram Seeing Matter Scale of Things Chart Contact Information Basic Energy Sciences U.S. Department of Energy SC-22/Germantown Building 1000 Independence Ave., SW Washington, DC 20585 P: (301) 903-3081 F: (301) 903-6594 E: sc.bes@science.doe.gov More Information » Science for Energy Flow Energy Flow Diagram Print Text Size: A A A RSS Feeds FeedbackShare Page This diagram shows 2010 energy flow from primary sources (oil, natural gas,

2

Landfill gas emission prediction using Voronoi diagrams and importance sampling  

Science Journals Connector (OSTI)

Municipal solid waste (MSW) landfills are among the nation's largest emitters of methane, a key greenhouse gas, and there is considerable interest in quantifying the surficial methane emissions from landfills. There are limitations in obtaining accurate ... Keywords: Air dispersion modeling, Delaunay tessellation, Kriging, Least squares, MSW landfill, Voronoi diagram

K. R. Mackie; C. D. Cooper

2009-10-01T23:59:59.000Z

3

Checking Threat Modeling Data Flow Diagrams for Implementation Conformance and Security  

E-Print Network (OSTI)

Checking Threat Modeling Data Flow Diagrams for Implementation Conformance and Security Marwan Abi Science Carnegie Mellon University Pittsburgh, PA 15213 Center for Software Excellence Abstract Threat Foundation. #12;Keywords: Threat modeling, data flow diagrams, reflexion models, architecture-level security

Abi-Antoun, Marwan

4

Fuel Retrieval System Process Flow Diagrams Mass Balance Calculations for K West Basin  

SciTech Connect

This calculation justifies the numbers used for the material balance on the process flow diagrams for the KW Basin Fuel Retrieval Subproject. The purpose of these calculations is to develop the material balances that are documented in the Fuel Retrieval System (FRS) Process Flow Diagrams for future reference. The attached mass calculations were prepared in support of revising the fuel retrieval system process flow diagrams for the 105K West Basin. The calculations refer to diagram H-1-81164.

REED, A.V.

2000-01-03T23:59:59.000Z

5

Integrated Water Treatment System (IWTS) Process Flow Diagram Mass Balance Calculations for K West Basin  

SciTech Connect

The purpose of this calculation is to develop the rational for the material balances that are documented in the KW Basin water system Level 1 process flow diagrams.

REED, A.V.

2000-02-28T23:59:59.000Z

6

Checking Threat Modeling Data Flow Diagrams for Implementation Conformance and Security  

E-Print Network (OSTI)

Checking Threat Modeling Data Flow Diagrams for Implementation Conformance and Security Marwan Abi Science Carnegie Mellon University Pittsburgh, PA 15213 # Center for Software Excellence Abstract Threat Foundation. #12; Keywords: Threat modeling, data flow diagrams, reflexion models, architecture­level security

7

Spent Nuclear Fuel (SNF) Project Canister Storage Building (CSB) Process Flow Diagram Mass Balance Calculations  

SciTech Connect

The purpose of these calculations is to develop the material balances for documentation of the Canister Storage Building (CSB) Process Flow Diagram (PFD) and future reference. The attached mass balances were prepared to support revision two of the PFD for the CSB. The calculations refer to diagram H-2-825869.

KLEM, M.J.

2000-05-11T23:59:59.000Z

8

A Cascade-Type Global Energy Conversion Diagram Based on WaveMean Flow Interactions  

Science Journals Connector (OSTI)

A cascade-type energy conversion diagram is proposed for the purpose of diagnosing the atmospheric general circulation based on wavemean flow interactions. Mass-weighted isentropic zonal means facilitate the expression of nongeostrophic wave ...

Sachiyo Uno; Toshiki Iwasaki

2006-12-01T23:59:59.000Z

9

Chapter 8 - Radial-Flow Gas Turbines  

Science Journals Connector (OSTI)

The various types of radial-flow gas turbine are described. A Mollier diagram with the changes in enthalpy of the component parts is shown for the turbine. Loss coefficients are defined and numerous calculation methods are outlined. The calculation of the all-important total-to-static efficiency is made and discussed. Some discussion of the losses in the inlet scroll and nozzle blades with an important expression for their calculation is given. The criterion for the minimum number of blades is explained. The design of the rotor exit is considered and some details of the effects of vane solidity are calculated. Details of the optimum design using the concept of specific speed are included. A brief discussion of the clearance and windage losses is given. Numerous examples and problems are included.

S.L. Dixon; C.A. Hall

2014-01-01T23:59:59.000Z

10

Magnetized accretion flows: effects of gas pressure  

Science Journals Connector (OSTI)

......axisymmetric magnetohydrodynamic (MHD) accretion flows depend on...their HD counterparts, the MHD simulations show that the magnetized...discs|black hole physics|MHD|methods: numerical|galaxies...on the luminosity-hardness diagrams. BHBs (as well as galactic......

M. Moscibrodzka; D. Proga

2009-08-21T23:59:59.000Z

11

Control and Data Flow Testing on Function Block Diagrams  

E-Print Network (OSTI)

in terms of function blocks and propose an algorithm that transforms an FBD network to a flow graph. We apply existing control and data flow testing coverage criteria to the flow graph in order to generate an indispensable step required to assure software quality. In the nuclear power plant control system, as existing

Jee, Eunkyoung

12

Load flow analysis: Base cases, data, diagrams, and results  

SciTech Connect

This report describes how an electric utility system is modeled by using load flow techniques to establish a validated power flow case suitable for simulating and evaluating alternative system scenarios. Details of the load flow model are supported by additional technical and descriptive information intended to correlate modeled electrical system parameters with the corresponding physical equipment that makes up the system. Pictures and technical specifications of system equipment from the utility, public, or vendor are provided to support this association for many system components. The report summarizes the load flow model construction, simulation, and validation and describes the general capabilities of an information query system designed to access load flow parameters and other electrical system information.

Portante, E.C.; Kavicky, J.A.; VanKuiken, J.C.; Peerenboom, J.P.

1997-10-01T23:59:59.000Z

13

Anisotropic collective flow of a Lorentz gas  

E-Print Network (OSTI)

Analytical results for the anisotropic collective flow of a Lorentz gas of massless particles scattering on fixed centres are presented.

Nicolas Borghini; Clement Gombeaud

2011-06-30T23:59:59.000Z

14

Spent Nuclear Fuel (SNF) Project Multi Canister Overpack (MCO) Process Flow Diagram Mass Balance Calculations  

SciTech Connect

The purpose of this calculation document is to develop the bases for the material balances of the Multi-Canister Overpack (MCO) Level 1 Process Flow Diagram (PFD). The attached mass balances support revision two of the PFD for the MCO and provide future reference.

KLEM, M.J.

2000-09-08T23:59:59.000Z

15

Oil and Gas CDT Coupled flow of water and gas  

E-Print Network (OSTI)

Oil and Gas CDT Coupled flow of water and gas during hydraulic fracture in shale The University relevant to the oil and gas industry. You will develop a versatile analytical, computational of Oxford http://www.earth.ox.ac.uk/people/profiles/academic/joec Key Words Shale gas, hydraulic fracture

Henderson, Gideon

16

Gas flow characterization of restrictive flow orifice devices  

SciTech Connect

A restrictive flow orifice (RFO) can be used to limit the uncontrolled release of system media upon component or line failure in a gas handling system and can thereby enhance the system safety. This report describes a new RFO product available from the Swagelok Companies and specifies the gas flow characteristics of this device. A family of four different sizes of RFO devices is documented.

Shrouf, R.G. [Sandia National Labs., Albuquerque, NM (United States). Safety Engineering Dept.; Page, S.R. [Albuquerque Valve and Fitting Co., NM (United States)

1997-07-01T23:59:59.000Z

17

ANUDlSiTM-40 Load Flow Analysis: Base Cases, Data, Diagrams, and Results  

Office of Scientific and Technical Information (OSTI)

ANUDlSiTM-40 ANUDlSiTM-40 Load Flow Analysis: Base Cases, Data, Diagrams, and Results by E.C. Portante, J.A. Kavicky, J.C. VanKuiken, and J.P. Peerenboom Decision and Information Sciences Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439 October 1997 Work sponsored by Navy Engineering Logistics Office This report is printed on recycled paper. @ DISCLAIMER This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness. or use- fulness of any information, apparatus, product, or process disclosed, or represents

18

NIST Measurement Services: Natural Gas Flow Calibration Service (NGFCS)  

E-Print Network (OSTI)

NIST Measurement Services: Natural Gas Flow Calibration Service (NGFCS) NIST Special Publication of Standards and Technology #12;i Table of Contents for the Natural Gas Flowmeter Calibration Service (NGFCS;1 Abstract This document describes NIST's high pressure natural gas flow calibration service (NGFCS). Flow

19

Lattice Boltzmann models for nonequilibrium gas flows  

Science Journals Connector (OSTI)

Due to its computational efficiency, the kinetic-based lattice Boltzmann method has recently been used to model nonequilibrium gas dynamics. With appropriate boundary conditions, lattice Boltzmann models have been able to capture both velocity slip and temperature jump at a solid surface. To enable these models to simulate flows in the transition regime, both high-order and modified lattice Boltzmann models have been proposed. In this paper, we demonstrate the advantages of the standard lattice Bhatnagar-Gross-Krook model in predicting high-order rarefaction phenomenon. In addition, we show that current high-order lattice Boltzmann models are not yet able to capture the nonlinear constitutive relation for the stress in the Knudsen layer, despite the improved predictions of the wall slip-velocity, especially for Poiseuille flow. By considering how the wall affects the gas mean free path, we present a simplified high-order lattice Boltzmann model that can predict flow in the transition regime and is also able to capture the essential characteristics of the Knudsen layer.

Gui-Hua Tang; Yong-Hao Zhang; David R. Emerson

2008-04-21T23:59:59.000Z

20

Gas Flowmeter Calibrations with the Working Gas Flow Standard NIST Special Publication 250-80  

E-Print Network (OSTI)

Gas Flowmeter Calibrations with the Working Gas Flow Standard NIST Special Publication 250-80 John of Standards and Technology U. S. Department of Commerce #12;ii Table of Contents Gas Flowmeter Calibrations with the Working Gas Flow Standard .......................... i Abstract

Note: This page contains sample records for the topic "gas flow diagram" 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

Gas flow means for improving efficiency of exhaust hoods  

DOE Patents (OSTI)

Apparatus is described for inhibiting the flow of contaminants in an exhaust enclosure toward an individual located adjacent an opening into the exhaust enclosure by providing a gas flow toward a source of contaminants from a position in front of an individual to urge said contaminants away from the individual toward a gas exit port. The apparatus comprises a gas manifold which may be worn by a person as a vest. The manifold has a series of gas outlets on a front face thereof facing away from the individual and toward the contaminants to thereby provide a flow of gas from the front of the individual toward the contaminants. 15 figures.

Gadgil, A.J.

1994-01-11T23:59:59.000Z

22

EIA - Natural Gas Pipeline Network - Transportation Process & Flow  

U.S. Energy Information Administration (EIA) Indexed Site

Process and Flow Process and Flow About U.S. Natural Gas Pipelines - Transporting Natural Gas based on data through 2007/2008 with selected updates Transportation Process and Flow Overview | Gathering System | Processing Plant | Transmission Grid | Market Centers/Hubs | Underground Storage | Peak Shaving Overview Transporting natural gas from the wellhead to the final customer involves several physical transfers of custody and multiple processing steps. A natural gas pipeline system begins at the natural gas producing well or field. Once the gas leaves the producing well, a pipeline gathering system directs the flow either to a natural gas processing plant or directly to the mainline transmission grid, depending upon the initial quality of the wellhead product.

23

Flow shaping using three-dimensional microscale gas discharge  

SciTech Connect

We introduce a flow shaping mechanism using surface compliant microscale gas discharge. A three-dimensional finite element-based multiscale ionized gas flow code is utilized to analyze charge separation, potential distribution, and flow inducement mechanism. For the case of quiescent flow, a horseshoe-shaped plasma generator is introduced. Due to its unusual shape, the three-dimensional electric force excites a pinching effect on the fluid inside selectively powered electrode arc. Such effect is capable of tripping the flow-ejecting fluid normal to the plane of the actuator and thus can be very useful for many applications.

Wang, C.-C.; Roy, Subrata [Department of Mechanical and Aerospace Engineering, Computational Plasma Dynamics Laboratory and Test Facility, University of Florida, Gainesville, Florida 32611-6300 (United States)

2009-08-24T23:59:59.000Z

24

Effects of a dilute gas of fermions on the superfluid-insulator phase diagram of the Bose-Hubbard model  

E-Print Network (OSTI)

Building on the work of Fisher et al. (Phys. Rev. B 40, 546 (1989)), we develop a framework for perturbation theory in the Bose-Hubbard model and apply it to calculate the effects of a degenerate gas of spin-polarized fermions interacting by contact interactions with the constituent bosons. For the single-band Bose-Hubbard model, the only non-trivial effect of the fermions is to induce an effective space- and time-dependent density-density interaction among the bosons. Using a path integral formulation, we develop the appropriate theory describing the perturbative effects of this fermion-mediated interaction (fermionic screening) on the generic superfluid-insulator phase diagram. For the single-band Bose-Hubbard model, we find that the net effect of the fermions is to inherently suppress the Mott-insulating lobes and enhance the area occupied by the superfluid phase in the phase diagram. For the more general multi-band Bose-Hubbard model, we find that, in addition to the fermion screening of the boson interactions, the virtual excitations of the bosons to the higher Bloch bands coupled with the contact interactions with the fermions result in an effective increase of the boson on-site repulsion. If this renormalization of the boson on-site potential is dominant over the fermion screening of the boson interactions, the area of the Mott insulating lobes of the Bose-Hubbard phase diagram will be enhanced for either sign of the boson-fermion interactions, as seen in recent experiments.

Sumanta Tewari; Roman M. Lutchyn; S. Das Sarma

2009-02-02T23:59:59.000Z

25

Detonation of Gas-Particle Flow  

Science Journals Connector (OSTI)

Fine organic or metallic particles suspended in an oxidizing or combustible gas form a reactive particlegas mixture. Explosion pressures in such mixtures are remarkably higher than those of gaseous fuelair m...

Fan Zhang

2009-01-01T23:59:59.000Z

26

Aerodynamics of Two Interfering Simple-Shape Bodies in Hypersonic Rarefied-Gas Flows  

E-Print Network (OSTI)

Aerodynamics of Two Interfering Simple-Shape Bodies in Hypersonic Rarefied-Gas Flows Vladimir V. Riabov Rivier College, Nashua, New Hampshire, USA ABSTRACT Hypersonic rarefied-gas flows near two side of Hypersonic Rarefied Gas Flows n

Riabov, Vladimir V.

27

The influence of strange quarks on QCD phase diagram and chemical freeze-out: Results from the hadron resonance gas model  

E-Print Network (OSTI)

We confront the lattice results on QCD phase diagram for two and three flavors with the hadron resonance gas model. Taking into account the truncations in the Taylor-expansion of energy density $\\epsilon$ done on the lattice at finite chemical potential $\\mu$, we find that the hadron resonance gas model under the condition of constant $\\epsilon$ describes very well the lattice phase diagram. We also calculate the chemical freeze-out curve according to the entropy density $s$. The $s$-values are taken from lattice QCD simulations with two and three flavors. We find that this condition is excellent in reproducing the experimentally estimated parameters of the chemical freeze-out.

A. Tawfik

2004-10-25T23:59:59.000Z

28

Lattice Boltzmann simulation of rarefied gas flows in microchannels  

Science Journals Connector (OSTI)

For gas flows in microchannels, slip motion at the solid surface can occur even if the Mach number is negligibly small. Since the Knudsen number of the gas flow in a long microchannel can vary widely and the Navier-Stokes equations are not valid for Knudsen numbers beyond 0.1, an alternative method that can be applicable to continuum, slip and transition flow regimes is highly desirable. The lattice Boltzmann equation (LBE) approach has recently been expected to have such potential. However, some hurdles need to be overcome before it can be applied to simulate rarefied gas flows. The first major hurdle is to accurately model the gas molecule and wall surface interactions. In addition, the Knudsen number needs to be clearly defined in terms of LBE properties to ensure that the LBE simulation results can be checked against experimental measurements and other simulation results. In this paper, the Maxwellian scattering kernel is adopted to address the gas molecule and surface interactions with an accommodation coefficient (in addition to the Knudsen number) controlling the amount of slip motion. The Knudsen number is derived consistently with the macroscopic property based definition. The simulation results of the present LBE model are in quantitative agreement with the established theory in the slip flow regime. In the transition flow regime, the model captures the Knudsen minimum phenomenon qualitatively. Therefore, the LBE can be a competitive method for simulation of rarefied gas flows in microdevices.

Yonghao Zhang; Rongshan Qin; David R. Emerson

2005-04-05T23:59:59.000Z

29

Flow through shares for Natural Gas exploration (Quebec, Canada) |  

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

Flow through shares for Natural Gas exploration (Quebec, Canada) Flow through shares for Natural Gas exploration (Quebec, Canada) Flow through shares for Natural Gas exploration (Quebec, Canada) < Back Eligibility Utility Industrial Program Info Funding Source Government of Quebec State Quebec Program Type Corporate Tax Incentive Provider Revenu Quebec, Resources Naturalles Quebec A flow-through share is a security issued by an exploration company that waives its exploration deduction in favor of the investor. The Québec Taxation Act enables a private individual to benefit from a significant tax deduction when calculating his or her taxable income. In fact, the Québec system provides for a basic deduction equal to 100 percent of the cost of the flow-through shares. For shares acquired after March 30, 2004 the individual may deduct an additional 25% when exploration costs are incurred

30

Numerical investigation of gas flow rate in shale gas reservoirs with nanoporous media  

Science Journals Connector (OSTI)

Abstract Theoretical analysis of transport mechanism of gas flow in shale gas reservoirs with nanoporous media was carried out on the basis of molecular kinetic theory. The motion equation and mathematical model of shale gas transport in multi-scale medium are established in this article. The pressure distribution equation of radial flow was derived, and the computing method of the control area of gas well was presented. Additionally, the volume flow rate equations of vertical and horizontal fractured wells were obtained. Through Newton iterative method, volume flow rate was analyzed, considering various factors such as production pressure drawdown, fracture half-length, fracture conductivity, fracture spacing and diffusion coefficient. According to the numerical results, the volume flow rate of the gas well increases when the diffusion coefficient grows. Consequently diffusion in shale gas reservoirs with nanoporous media plays an important role. With increase of fracture half-length, the volume flow rate increases first and then tends towards stability. Moreover, for certain length of the horizontal wellbore, when fracture spacing increases and the number of the fractures lessens, the control area and the volume flow rate of the gas well decreases. Therefore, there is an optimum allocation among these factors to achieve maximum volume flow.

Hongqing Song; Mingxu Yu; Weiyao Zhu; Peng Wu; Yu Lou; Yuhe Wang; John Killough

2015-01-01T23:59:59.000Z

31

Macroscopic transport models for rarefied gas flows: a brief review  

Science Journals Connector (OSTI)

......which has a non-negative production. For space reasons...considered to describe the gas on the macroscopic level...description of rarefied gas flows with Knudsen numbers...fraction of the numerical cost of microscopic solvers...available only for monatomic gases. Since most gases of......

Henning Struchtrup; Peyman Taheri

2011-10-01T23:59:59.000Z

32

Electrical Control of Gas Flows in Combustion Processes  

Science Journals Connector (OSTI)

...research-article Electrical Control of Gas Flows in Combustion Processes J. Lawton P. J. Mayo F. J. Weinberg The theory...where they can be used to modify a variety of combustion processes. Theoretical maximum values of the flow parameters...

1968-01-01T23:59:59.000Z

33

Modeling gas flow through microchannels and nanopores Subrata Roya)  

E-Print Network (OSTI)

Modeling gas flow through microchannels and nanopores Subrata Roya) and Reni Raju Computational. A two-dimensional finite-element based microscale flow model is developed to efficiently predict is modeled using either the continuum or the molecular approach.1­4 The con- tinuum approach solves

Roy, Subrata

34

The Energy Transformation Limit Theorem for Gas Flow Systems  

E-Print Network (OSTI)

The limit energy theorem which determines the possibility of transformation the energy flow in power systems in the absence of technical work is investigated and proved for such systems as gas lasers and plasmatrons, chemical gas reactors, vortex tubes, gas-acoustic and other systems, as well as a system of close stars. In the case of the same name ideal gas in the system the maximum ratio of energy conversion effectiveness is linked to the Carnot theorem, which in its turn is connected with the Nernst theorem. However, numerical analyses show that the class of flow energy systems is non-carnot one. The ratio of energy conversion effectiveness depends on the properties of the working medium; a conventional cycle in open-circuit is essentially irreversible. The proved theorem gives a more strongly worded II law of thermodynamics for the selected class of flow energy systems. Implications for astrophysical thermodynamic systems and the theory of a strong shock wave are discussed.

Volov, V T

2011-01-01T23:59:59.000Z

35

DYNAMIC MODELING STRATEGY FOR FLOW REGIME TRANSITION IN GAS-LIQUID TWO-PHASE FLOWS  

SciTech Connect

In modeling gas-liquid two-phase flows, the concept of flow regime has been used to characterize the global interfacial structure of the flows. Nearly all constitutive relations that provide closures to the interfacial transfers in two-phase flow models, such as the two-fluid model, are often flow regime dependent. Currently, the determination of the flow regimes is primarily based on flow regime maps or transition criteria, which are developed for steady-state, fully-developed flows and widely applied in nuclear reactor system safety analysis codes, such as RELAP5. As two-phase flows are observed to be dynamic in nature (fully-developed two-phase flows generally do not exist in real applications), it is of importance to model the flow regime transition dynamically for more accurate predictions of two-phase flows. The present work aims to develop a dynamic modeling strategy for determining flow regimes in gas-liquid two-phase flows through the introduction of interfacial area transport equations (IATEs) within the framework of a two-fluid model. The IATE is a transport equation that models the interfacial area concentration by considering the creation and destruction of the interfacial area, such as the fluid particle (bubble or liquid droplet) disintegration, boiling and evaporation; and fluid particle coalescence and condensation, respectively. For the flow regimes beyond bubbly flows, a two-group IATE has been proposed, in which bubbles are divided into two groups based on their size and shape (which are correlated), namely small bubbles and large bubbles. A preliminary approach to dynamically identifying the flow regimes is provided, in which discriminators are based on the predicted information, such as the void fraction and interfacial area concentration of small bubble and large bubble groups. This method is expected to be applied to computer codes to improve their predictive capabilities of gas-liquid two-phase flows, in particular for the applications in which flow regime transition occurs.

X. Wang; X. Sun; H. Zhao

2011-09-01T23:59:59.000Z

36

Gas flow driven by thermal creep in dusty plasma T. M. Flanagan and J. Goree  

E-Print Network (OSTI)

Gas flow driven by thermal creep in dusty plasma T. M. Flanagan and J. Goree Department of Physics 2009 Thermal creep flow TCF is a flow of gas driven by a temperature gradient along a solid boundary to the bulk gas, causing the bulk gas to flow, thereby stirring the suspension of dust particles. This result

Goree, John

37

GLOBAL OPTIMIZATION OF MULTIPHASE FLOW NETWORKS IN OIL AND GAS PRODUCTION SYSTEMS  

E-Print Network (OSTI)

1 GLOBAL OPTIMIZATION OF MULTIPHASE FLOW NETWORKS IN OIL AND GAS PRODUCTION SYSTEMS MSc. Hans in an oil production system is developed. Each well may be manipulated by injecting lift gas and adjusting in the maximum oil flow rate, water flow rate, liquid flow rate, and gas flow rate. The wells may also

Johansen, Tor Arne

38

Numerical studies of hypersonic binary gas-mixture flows near a sphere  

E-Print Network (OSTI)

Numerical studies of hypersonic binary gas-mixture flows near a sphere V.V. Riabov 1 Diffusive] to study the flow. In the present study, diffusive effects in hypersonic flows of binary gas-mixtures near

Riabov, Vladimir V.

39

Interaction of a surface glow discharge with a gas flow  

SciTech Connect

A surface glow discharge in a gas flow is of particular interest as a possible tool for controlling the flow past hypersonic aircrafts. Using a hydrodynamic model of glow discharge, two-dimensional calculations for a kilovolt surface discharge in nitrogen at a pressure of 0.5 Torr are carried out in a stationary gas, as well as in a flow with a velocity of 1000 m/s. The discharge structure and plasma parameters are investigated near a charged electrode. It is shown that the electron energy in a cathode layer reaches 250-300 eV. Discharge is sustained by secondary electron emission. The influence of a high-speed gas flow on the discharge is considered. It is shown that the cathode layer configuration is flow-resistant. The distributions of the electric field and electron energy, as well as the ionization rate profile in the cathode layer, do not change qualitatively under the action of the flow. The basic effect of the flow's influence is a sharp decrease in the region of the quasineutral plasma surrounding the cathode layer due to fast convective transport of ions.

Aleksandrov, A. L., E-mail: a_alex@itam.nsc.ru; Schweigert, I. V. [Russian Academy of Sciences, Khristianovich Institute of Theoretical and Applied Mechanics, Siberian Branch (Russian Federation)

2010-05-15T23:59:59.000Z

40

Turbine exhaust diffuser with region of reduced flow area and outer boundary gas flow  

DOE Patents (OSTI)

An exhaust diffuser system and method for a turbine engine. The outer boundary may include a region in which the outer boundary extends radially inwardly toward the hub structure and may direct at least a portion of an exhaust flow in the diffuser toward the hub structure. At least one gas jet is provided including a jet exit located on the outer boundary. The jet exit may discharge a flow of gas downstream substantially parallel to an inner surface of the outer boundary to direct a portion of the exhaust flow in the diffuser toward the outer boundary to effect a radially outward flow of at least a portion of the exhaust gas flow toward the outer boundary to balance an aerodynamic load between the outer and inner boundaries.

Orosa, John

2014-03-11T23:59:59.000Z

Note: This page contains sample records for the topic "gas flow diagram" 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

State law equation of a real gas and simulation of electrical arc/gas flow interaction  

Science Journals Connector (OSTI)

Modeling of gas movements in a circuit breaker arc chamber requires an accurate knowledge of thermodynamic functions. The proposed method gives a simplified form of the law of state, in close agreement with the tables. This law has been implemented in the NS2 code developed at Merlin Gerin, France. This code allows detailed investigation of gas flows in circuit breakers.

P Chevrier; J Maftoul

1993-01-01T23:59:59.000Z

42

Gas, liquids flow rates hefty at Galveston Bay discovery  

SciTech Connect

Extended flow tests indicate a large Vicksburg (Oligocene) gas, condensate, and oil field is about to be developed in western Galveston Bay. Internal estimates indicates that ultimate recovery from the fault block in which the discovery well was drilled could exceed 1 tcf of gas equivalent of proved, possible, and probable reserves. The paper discusses the test program for this field and other prospects in the Galveston Bay area.

Petzet, G.A.

1998-01-19T23:59:59.000Z

43

Coupling of a two phase gas liquid compositional 3D Darcy flow with a 1D compositional free gas  

E-Print Network (OSTI)

Coupling of a two phase gas liquid compositional 3D Darcy flow with a 1D compositional free gas. Masson1 , L. Trenty2 , Y. Zhang1 Coupling of a two phase gas liquid compositional 3D Darcy flow #12 analysis K, Brenner1 , R. Masson1 , L. Trenty2 , Y. Zhang1 Coupling of a two phase gas liquid compositional

Ribot, Magali

44

Numerical simulations of the Macondo well blowout reveal strong control of oil flow by reservoir permeability and exsolution of gas  

E-Print Network (OSTI)

for estimates of the oil and gas flow rate from the Macondoteam and carried out oil and gas flow simulations using theoil-gas system. The flow of oil and gas was simulated using

Oldenburg, C.M.

2013-01-01T23:59:59.000Z

45

Gas-solid flow characteristics in high-density CFB  

Science Journals Connector (OSTI)

The gas-solid flow characteristics in the riser of a high density CFB of square (0.27 m0.27 m10...? 0.187m10.4 m) cross section, using Geldart B particles (quartz sand), was investigated experimentally. The in...

Xue-yao Wang; Bao-guo Fan; Sheng-dian Wang; Xiang Xu

2012-08-01T23:59:59.000Z

46

Analysis of models for induced gas flow in the unsaturated zone Kehua You,1  

E-Print Network (OSTI)

Analysis of models for induced gas flow in the unsaturated zone Kehua You,1 Hongbin Zhan,1 term are frequently employed in modeling the induced gas flow in an unsaturated zone underlying a leaky 2011. [1] Accurate description of induced gas flow in an unsaturated zone is indispensable

Zhan, Hongbin

47

Liquid and liquidgas flows at all speeds  

SciTech Connect

All speed flows and in particular low Mach number flow algorithms are addressed for the numerical approximation of the Kapila et al. [1] multiphase flow model. This model is valid for fluid mixtures evolving in mechanical equilibrium but out of temperature equilibrium and is efficient for material interfaces computation separating miscible and non-miscible fluids. In this context, the interface is considered as a numerically diffused zone, captured as well as all present waves (shocks, expansion waves). The same flow model can be used to solve cavitating and boiling flows [2]. Many applications occurring with liquidgas interfaces and cavitating flows involve a very wide range of Mach number, from 10{sup ?3} to supersonic (and even hypersonic) conditions with respect to the mixture sound speed. It is thus important to address numerical methods free of restrictions regarding the Mach number. To do this, a preconditioned Riemann solver is built and embedded into the Godunov explicit scheme. It is shown that this method converges to exact solutions but needs too small time steps to be efficient. An implicit version is then derived, first in one dimension and second in the frame of 2D unstructured meshes. Two-phase flow preconditioning is then addressed in the frame of the Saurel et al. [3] algorithm. Modifications of the preconditioned Riemann solver are needed and detailed. Convergence of both single phase and two-phase numerical solutions are demonstrated with the help of single phase and two-phase steady nozzle flow solutions. Last, the method is illustrated by the computation of real cavitating flows in Venturi nozzles. Vapour pocket size and instability frequencies are reproduced by the model and method without using any adjustable parameter.

LeMartelot, S., E-mail: sebastien.lemartelot@polytech.univ-mrs.fr [Polytech'Marseille, Aix-Marseille University, UMR CNRS 7343 IUSTI, 5 rue E. Fermi, 13453 Marseille Cedex 13 (France); Nkonga, B., E-mail: boniface.nkonga@unice.fr [RS2N, Bastidon de la Caou, 13360 Roquevaire (France); University of Nice, LJAD UMR CNRS 7351, Parc Valrose, 06108 Nice Cedex (France); Saurel, R., E-mail: richard.saurel@polytech.univ-mrs.fr [Polytech'Marseille, Aix-Marseille University, UMR CNRS 7343 IUSTI, 5 rue E. Fermi, 13453 Marseille Cedex 13 (France); RS2N, Bastidon de la Caou, 13360 Roquevaire (France); University Institute of France, 5 rue E. Fermi, 13453 Marseille Cedex 13 (France)

2013-12-15T23:59:59.000Z

48

Theoretical and numerical studies on the flow multiplicity phenomenon for gassolids two-phase flows in CFB risers  

Science Journals Connector (OSTI)

The dependence of the fully-developed flow profiles on the inlet flow conditions for gassolids two-phase flows, i.e. the flow multiplicity phenomenon, in circulating fluidized bed (CFB) risers was proposed and discussed in this article. The flow multiplicity phenomenon for gassolids two-phase flows was first proved mathematically based on the conservation equations of mass and momentum. Then the CFD model using EulerianEulerian approach with k? turbulence model for each phase was further adopted to analyze the details of this flow multiplicity phenomenon. It is theoretically and numerically revealed that for gassolids two-phase flows, the flow profiles in the fully-developed region are always dominated by the flow profiles at the inlet. The solids concentration profile is closely coupled with the velocity profile, and the inlet solids concentration and velocity profiles can largely influence the fully-developed concentration and velocity profiles.

B. Peng; C. Zhang; J. Zhu

2011-01-01T23:59:59.000Z

49

Gas Kinetic Scheme for Continuum and Near-Continuum Hypersonic Flows  

E-Print Network (OSTI)

Gas Kinetic Scheme for Continuum and Near-Continuum Hypersonic Flows Wei Liao and Li-Shi Luo Old for the near-continuum flows. The gas-kinetic schemes are validated with simulations of the hypersonic flow thickness, modeling and simulation of complex hypersonic flows become very challenging for computational

Luo, Li-Shi

50

A multiple temperature kinetic model and its application to micro-scale gas flow simulations  

E-Print Network (OSTI)

A multiple temperature kinetic model and its application to micro-scale gas flow simulations model, micro-scale flows. 1. Introduction Gas flows can be classified according to the flow regimes_pku@yahoo.com.cn Abstract This paper presents a numerical approach to solve the multiple temperature kinetic model (MTKM

Xu, Kun

51

The Implications and Flow Behavior of the Hydraulically Fractured Wells in Shale Gas Formation  

E-Print Network (OSTI)

approaches is by drilling horizontal wells and hydraulically fracturing the formation. Once the formation is fractured, different flow patterns will occur. The dominant flow regime observed in the shale gas formation is the linear flow or the transient...

Almarzooq, Anas Mohammadali S.

2012-02-14T23:59:59.000Z

52

Gasliquid flow stability and bubble formation in non-Newtonian fluids in microfluidic flow-focusing devices  

Science Journals Connector (OSTI)

This communication describes the gasliquid two-phase flow patterns and the formation of bubbles in non-Newtonian fluids in microfluidic flow-focusing devices. Experiments were conducted in two different polym...

Taotao Fu; Youguang Ma; Denis Funfschilling; Huai Z. Li

2011-05-01T23:59:59.000Z

53

Flammable gas interlock spoolpiece flow response test report  

SciTech Connect

The purpose of this test report is to document the testing performed under the guidance of HNF-SD-WM-TC-073, {ital Flammable Gas Interlock Spoolpiece Flow Response Test Plan and Procedure}. This testing was performed for Lockheed Martin Hanford Characterization Projects Operations (CPO) in support of Rotary Mode Core Sampling jointly by SGN Eurisys Services Corporation and Numatec Hanford Company. The testing was conducted in the 305 building Engineering Testing Laboratory (ETL). NHC provides the engineering and technical support for the 305 ETL. The key personnel identified for the performance of this task are as follows: Test responsible engineering manager, C. E. Hanson; Flammable Gas Interlock Design Authority, G. P. Janicek; 305 ETL responsible manager, N. J. Schliebe; Cognizant RMCS exhauster engineer, E. J. Waldo/J. D. Robinson; Cognizant 305 ETL engineer, K. S. Witwer; Test director, T. C. Schneider. Other support personnel were supplied, as necessary, from 305/306 ETL. The testing, on the flammable Gas Interlock (FGI) system spoolpiece required to support Rotary Mode Core Sampling (RMCS) of single shell flammable gas watch list tanks, took place between 2-13-97 and 2-25-97.

Schneider, T.C., Fluor Daniel Hanford

1997-03-24T23:59:59.000Z

54

Multiple temperature kinetic model and gas-kinetic method for hypersonic non-equilibrium flow computations  

E-Print Network (OSTI)

Multiple temperature kinetic model and gas-kinetic method for hypersonic non-equilibrium flow. For the non-equilibrium flow computations, i.e., the nozzle flow and hypersonic rarefied flow over flat plate-kinetic method; Hypersonic and rarefied flows 1. Introduction The development of aerospace technology has

Xu, Kun

55

Gas flow to a barometric pumping well in a multilayer unsaturated Kehua You,1  

E-Print Network (OSTI)

Gas flow to a barometric pumping well in a multilayer unsaturated zone Kehua You,1 Hongbin Zhan,1. [1] When an open well is installed in an unsaturated zone, gas can flow between the subsurface and the well depending on the gas pressure gradient near the well. This well is called a barometric pumping

Zhan, Hongbin

56

The McCormack model for gas mixtures: Plane Couette flow R. D. M. Garcia  

E-Print Network (OSTI)

The McCormack model for gas mixtures: Plane Couette flow R. D. M. Garcia HSH Scientific Computing flow for a binary gas mixture described by the McCormack kinetic model. The solution yields, defined for binary gas mixtures in terms of the McCormack model, for semi-infinite media14 Kramers

Siewert, Charles E.

57

Gas-Kinetic Scheme for Continuum and Near-Continuum Hypersonic Flows  

E-Print Network (OSTI)

Gas-Kinetic Scheme for Continuum and Near-Continuum Hypersonic Flows Wei Liao and Li-Shi Luo Old. The gas-kinetic schemes are validated with simulations of the hypersonic flow past a hollow flare at Mach and simulation of complex hypersonic flows become very challenging for computa- tional fluid dynamics (CFD) [1

Xu, Kun

58

A multidimensional gas-kinetic BGK scheme for hypersonic viscous flow  

E-Print Network (OSTI)

A multidimensional gas-kinetic BGK scheme for hypersonic viscous flow Kun Xu a,*, Meiliang Mao b for the Navier­Stokes equations in the study of hypersonic viscous flow. Firstly, we extend the gas. In the numerical parts, we concentrate on the computation of heat flux in laminar hypersonic viscous flows, where

Xu, Kun

59

The RealGas and RealGasH2O options of the TOUGH+ code for the simulation of coupled fluid and heat flow in tight/shale gas systems  

Science Journals Connector (OSTI)

We developed two new EOS additions to the TOUGH+ family of codes, the RealGasH2O and RealGas. The RealGasH2O EOS option describes the non-isothermal two-phase flow of water and a real gas mixture in gas reservoirs, with a particular focus in ultra-tight ... Keywords: Coupled flow and heat flow, Fractured media, Multicomponent flow, Numerical simulation, Real gas mixture, Shale gas

George J. Moridis, Craig M. Freeman

2014-04-01T23:59:59.000Z

60

Relation between plasma plume density and gas flow velocity in atmospheric pressure plasma  

SciTech Connect

We have studied atmospheric pressure plasma generated using a quartz tube, helium gas, and copper foil electrode by applying RF high voltage. The atmospheric pressure plasma in the form of a bullet is released as a plume into the atmosphere. To study the properties of the plasma plume, the plasma plume current is estimated from the difference in currents on the circuit, and the drift velocity is measured using a photodetector. The relation of the plasma plume density n{sub plu}, which is estimated from the current and the drift velocity, and the gas flow velocity v{sub gas} is examined. It is found that the dependence of the density on the gas flow velocity has relations of n{sub plu} ? log(v{sub gas}). However, the plasma plume density in the laminar flow is higher than that in the turbulent flow. Consequently, in the laminar flow, the density increases with increasing the gas flow velocity.

Yambe, Kiyoyuki; Taka, Shogo; Ogura, Kazuo [Graduate School of Science and Technology, Niigata University, Niigata 950-2181 (Japan)] [Graduate School of Science and Technology, Niigata University, Niigata 950-2181 (Japan)

2014-04-15T23:59:59.000Z

Note: This page contains sample records for the topic "gas flow diagram" 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

The damped natural oscillations of a gas flowing past a cascade of flat plates  

Science Journals Connector (OSTI)

We solve the problem of the natural oscillations of a gas flowing past a cascade of flat plates under the Joukowsky-Chaplygin ... case part of the energy of the oscillating gas is consumed in the formation of a ....

V. B. Kurzin

62

Numerical Early Warning Model Research of Landfill Gas Permeation and Diffusion Considering Flow-Temperature Coupling  

Science Journals Connector (OSTI)

Based on seepage mechanics in porous medium gas and heat transfer theory, numerical early warning model is established, which is on quantitative description of migration and release of landfill gas and penetration and diffusion of energy, and dynamic ... Keywords: component, landfill gas, flow-temperature coupling, gas pressure and temperature distribution, numerical early warning model

Xue Qiang; Feng Xia-ting; Ma Shi-jin; Zhou Xiao-jun

2009-10-01T23:59:59.000Z

63

Enhanced thermal and gas flow performance in a three-way catalytic...  

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

flow performance in a three-way catalytic converter through use of insulation within the ceramic monolith Enhanced thermal and gas flow performance in a three-way catalytic...

64

Oil and Gas Flow Data from the Top Hat and from the Choke Line...  

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

Flow Data from the Top Hat and from the Choke Line - XLS Oil and Gas Flow Data from the Top Hat and from the Choke Line - XLS Updated through 12:00 AM on July 10, 2010...

65

A novel dynamic lattice boltzmann method for numerical simulation of viscous gas flows.  

E-Print Network (OSTI)

??In the past century, the Boltzmann equation has been demonstrated as the most accurate model based on statistical mechanics to describe the gas flows. Due (more)

Chiang, Sum Wai

2010-01-01T23:59:59.000Z

66

Gas-flow-induced controlled unidirectional operation of a CO2 ring laser  

Science Journals Connector (OSTI)

It is shown experimentally and theoretically that axial gas flow leads to controlled unidirectional operation of a CO2 ring laser. The direction of emission, clockwise or...

Boulnois, J L; Agrawal, Govind P; Bret, G; Cottin, P; Van Lerberghe, A

1985-01-01T23:59:59.000Z

67

A simple model of gas flow in a porous powder compact  

SciTech Connect

This report describes a simple model for ideal gas flow from a vessel through a bed of porous material into another vessel. It assumes constant temperature and uniform porosity. Transport is treated as a combination of viscous and molecular flow, with no inertial contribution (low Reynolds number). This model can be used to fit data to obtain permeability values, determine flow rates, understand the relative contributions of viscous and molecular flow, and verify volume calibrations. It draws upon the Dusty Gas Model and other detailed studies of gas flow through porous media.

Shugard, Andrew D.; Robinson, David B.

2014-04-01T23:59:59.000Z

68

Numerical and experimental studies on the flow multiplicity phenomenon for gassolids two-phase flows in CFB risers  

Science Journals Connector (OSTI)

The flow multiplicity phenomenon in circulating fluidized bed (CFB) risers, i.e. under the same superficial gas velocity and solids circulation rate, the CFB risers may sometimes exhibit multiple flow structures, was numerically and experimentally investigated in this study. To investigate the flow multiplicity phenomenon, the experiments of gassolids two-phase flows in a 2-D CFB riser with different flow profiles at the inlet of the CFB riser were conducted. Specially designed gas inlet distributors with add-ons are used to generate different flow profiles at the inlet of the CFB rise. The CFD model using EulerianEulerian approach with k? turbulence model for each phase was employed to numerically analyze the flow multiplicity phenomenon. It is experimentally and numerically proved that for gassolids two-phase flows, the flow profiles in the fully-developed region are dominated by the flow profiles at the inlet. The solids concentration profile is closely coupled with the velocity profile, and the inlet solids concentration and velocity profiles can largely influence the fully-developed solids concentration and velocity profiles.

B. Peng; J. Xu; J. Zhu; C. Zhang

2011-01-01T23:59:59.000Z

69

Collection of Samples Under Pressure for Chromatographic Analysis and a System for Handling Gas-Condensate Type Fluids  

Science Journals Connector (OSTI)

......only two principal handling precautions emerged...analysis of the C7+ material. Yarborough and Vogel...our knowledge. A flow diagram of the two systems is...Figure 3. Schematic diagram of gas liquid chromatograph...4-B is a schematic diagram of one possible solution......

R. H. Jacoby; J. H. Tracht

1975-01-01T23:59:59.000Z

70

ANALYSIS OF HIGH PRESSURE TESTS ON WET GAS FLOW METERING WITH A VENTURI METER  

E-Print Network (OSTI)

ANALYSIS OF HIGH PRESSURE TESTS ON WET GAS FLOW METERING WITH A VENTURI METER P. Gajan , Q, 64018 Pau cedex, France pierre.gajan@onera.fr Abstract This work deals with the flow metering of wet gas on the CEESI facilities are presented. They are performed at 75 bars with 0.6 beta ratio Venturi meter

71

Interplay of discharge and gas flow in atmospheric pressure plasma jets Nan Jiang,1  

E-Print Network (OSTI)

Interplay of discharge and gas flow in atmospheric pressure plasma jets Nan Jiang,1 JingLong Yang,2 2011) Interplay of discharge and gas flow in the atmospheric pressure plasma jets generated with three:10.1063/1.3581067] I. INTRODUCTION The atmospheric pressure plasma jet (APPJ) that is nor- mally

Zexian, Cao

72

Hopper System Diagram  

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

System Diagram System Diagram Diagram of IO architecture on Hopper Diagram of external IO services on the Hopper system Last edited: 2011-04-14 15:11:1...

73

High order lattice Boltzmann models for gas flow on a wide range of Knudsen number  

E-Print Network (OSTI)

High order lattice Boltzmann models for gas flow on a wide range of Knudsen number L´eonard de, 2011) The lattice Boltzmann methods (LBM) have successfully been applied to micro-scale flows], which are micro-metric system flows driven by macroscopic pumps. The Lattice Boltzmann Method (LBM) has

Paris-Sud XI, Université de

74

Steam generators two phase flows numerical simulation with liquid and gas momentum equations  

E-Print Network (OSTI)

Steam generators two phase flows numerical simulation with liquid and gas momentum equations M Abstract This work takes place in steam generators flow studies and we consider here steady state three words: Steam Generator, Two-phase Flow, Finite element Email address: Marc.Grandotto@cea.fr (M

Paris-Sud XI, Université de

75

Numerical Study of Hypersonic Rarefied-Gas Flows About a Toroidal Ballute  

E-Print Network (OSTI)

Numerical Study of Hypersonic Rarefied-Gas Flows About a Toroidal Ballute Vladimir V. Riabov. Hypersonic flows of nitrogen, oxygen, argon, and carbon dioxide near a toroidal ballute have been of aerothermodynamics of simple-shape bodies have provided valuable information related to physics of hypersonic flows

Riabov, Vladimir V.

76

Modeling of flowing gas diode pumped alkali lasers: dependence of the operation on the gas velocity and on the nature of the buffer gas  

Science Journals Connector (OSTI)

A simple, semi-analytical model of flowing gas diode pumped alkali lasers (DPALs) is presented. The model takes into account the rise of temperature in the lasing medium with...

Barmashenko, B D; Rosenwaks, S

2012-01-01T23:59:59.000Z

77

ARC-HEATED GAS FLOW EXPERIMENTS FOR HYPERSONIC PROPULSION  

E-Print Network (OSTI)

was extensively developed for the purpose of eventually performing experiments simulating scramjet engine flow

Texas at Arlington, University of

78

Why Do Continuum Gas-Solids Flow Models Predict Core-Annulus Flow?  

SciTech Connect

Core-annulus flow is an experimentally well established, industrially significant flow pattern of circulating fluidized beds. Several studies reported in the literature have shown that continuum gas-solids flow models are able to predict that flow pattern. But the crucial features of the model that give rise to the core-annulus flow structure have not been identified. To determine those features, we conduct transient simulations and analyze the results. Furthermore we time-average the results and investigate the formulation of time-averaged equations. We use transient, highly resolved, 1-D, grid-independent numerical solutions of a continuum model in this study. We show that the results could be even qualitatively incorrect (high solids concentration at the center of the channel) unless grid-independence is established. This explains why in certain coarse grid computations reported in the literature it was necessary to remove a dissipation term or to increase the particle size. Our simulations verify that the core-annulus structure arises in a time-averaged sense from unsteady gas-solids flow, as observed in experiments. We show that the key term that makes the flow unsteady is the dissipation term in the granular energy equation. Without that term the simulation yields a steady-state solution. The intuition based on steady-state solutions may not be valid. Unlike steady-state solutions, the transient solutions are not unduly sensitive to the restitution coefficient. The effect of restitution coefficient in transient simulations is remarkably different: a smaller restitution coefficient gives a higher average granular temperature. Both the micro-scale (clusters resolved) and meso-scale (clusters time-averaged) phenomena are important, unlike turbulent single-phase flows where the meso-scale (turbulent) stresses dominate. The prediction of core-annulus flow is strongly affected by the parameters used in the (micro-scale) wall boundary conditions; it is essential that the parameters are such that no granular energy is produced at the wall. The normal stress based on kinetic theory (Ps, micro) is an order of magnitude larger than normal stress arising from fluctuations (Ps, meso). Therefore, the granular temperature and solids fraction are approximately inversely correlated, just as shown by a steady-state analysis. However, the gradient of Ps, micro is of the same order of magnitude as the gradient of Ps, meso; those gradients adjust to ensure that the time averaged total Ps gradient in the radial direction is zero. The meso-scale shear stress is larger than the micro-scale shear stress. The meso-scale granular energy production term dominates the corresponding micro-scale term and must be included in time-averaged equations. That term is responsible for the maximum at the center in the granular temperature profile. The micro-scale granular energy production term is identically zero at the center because it is proportional to the gradient of solids velocity, which is zero at the center. The instantaneous gradient of solids velocity at the center, however, is not zero because of the down flow of clusters near the walls; it takes positive and negative values making the time-averaged velocity gradient exactly zero at the center. Therefore, the time-averaged square of the velocity gradient is non-zero at the center, which results in a production term in the time-averaged equations that is non-zero at the center. We find that the predictions are insensitive to the currently available k- type turbulence models. The traditional k- type models, based on the experience with single phase flow calculations, may not be adequate because meso-scale terms do not necessarily dominate the micro-scale terms. And certain parameters could behave counter to our intuition based on single phase flows: we compute and confirm with physical arguments that the gas-phase turbulent (meso-scale) viscosity could become negative.

Benyahia, S.; Syamlal, M.; O'Brien, T.J.

2006-11-01T23:59:59.000Z

79

Ion transport membrane module and vessel system with directed internal gas flow  

DOE Patents (OSTI)

An ion transport membrane system comprising (a) a pressure vessel having an interior, an inlet adapted to introduce gas into the interior of the vessel, an outlet adapted to withdraw gas from the interior of the vessel, and an axis; (b) a plurality of planar ion transport membrane modules disposed in the interior of the pressure vessel and arranged in series, each membrane module comprising mixed metal oxide ceramic material and having an interior region and an exterior region; and (c) one or more gas flow control partitions disposed in the interior of the pressure vessel and adapted to change a direction of gas flow within the vessel.

Holmes, Michael Jerome (Thompson, ND); Ohrn, Theodore R. (Alliance, OH); Chen, Christopher Ming-Poh (Allentown, PA)

2010-02-09T23:59:59.000Z

80

Influence of the gas-flow Reynolds number on a plasma column in a glass tube  

SciTech Connect

Atmospheric-plasma generation inside a glass tube is influenced by gas stream behavior as described by the Reynolds number (Rn). In experiments with He, Ne, and Ar, the plasma column length increases with an increase in the gas flow rate under laminar flow characterized by Rn < 2000. The length of the plasma column decreases as the flow rate increases in the transition region of 2000 < Rn < 4000. For a turbulent flow beyond Rn > 4000, the length of the plasma column is short in front of the electrode, eventually leading to a shutdown.

Jin, Dong Jun; Uhm, Han S.; Cho, Guangsup [Department of Electronic and Biological Physics, Kwangwoon University, 20 Kwangwon-Ro, Nowon-Gu, Seoul 139-701 (Korea, Republic of)] [Department of Electronic and Biological Physics, Kwangwoon University, 20 Kwangwon-Ro, Nowon-Gu, Seoul 139-701 (Korea, Republic of)

2013-08-15T23:59:59.000Z

Note: This page contains sample records for the topic "gas flow diagram" 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

On the application of MHD-gas acceleration wind tunnels to investigate hypersonic gas flows over bodies  

SciTech Connect

The paper contains the results of applying a hypervelocity MHD-gas acceleration wind tunnel to investigations of flows over bodies. Consideration is given to the conditions of re producing gas dynamic and thermochemical flow parameters as applied to different types of tests: pressure and heat flux distributions, determination of shock wave positions and shapes. The measured heat fluxes towards the leading edge of swept wings are presented for sweep angles ranging from 0{degrees} to 60{degrees} at a flow velocity of U{approximately}6000 m/s. An appreciable influence of the surface nonequilibrium and catalyticity on their values is indicated. Possible investigations of flows over bodies at ultra high heat fluxes, q {approximately} 10 kW/m{sup 2} are discussed. The results of applying the facility to the verification of calculation codes and thermodynamic gas models are analyzed for flows over a hemisphere, a cone and a wedge. The calculated and measured surface pressure distributions are in good agreement for a hemisphere and satisfactory for a cone and a wedge. The shock wave positions and shapes are compared. It is shown that respective gas glow is impossible to use for this purpose.

Alfyorov, V.I.; Yegorov, I.V.; Shcherbakov, G.I. [Central Aerodrodynamic Institute (TsAGI), Zhukovsky (Russian Federation)

1995-12-31T23:59:59.000Z

82

A Novel Approach For the Simulation of Multiple Flow Mechanisms and Porosities in Shale Gas Reservoirs  

E-Print Network (OSTI)

The state of the art of modeling fluid flow in shale gas reservoirs is dominated by dual porosity models that divide the reservoirs into matrix blocks that significantly contribute to fluid storage and fracture networks which principally control...

Yan, Bicheng

2013-07-15T23:59:59.000Z

83

Local heat and mass transfer for gas-solid two phase flow in CFB  

Science Journals Connector (OSTI)

An experimental investigation on the flow characteristics and the local heat and mass transfer between coarse wet particles and hot gas in the circulating fluidized bed (CFB) has been performed. A two-thermocoupl...

Feng Lu; Ming-Heng Shi

1994-09-01T23:59:59.000Z

84

Modeling of gas-solid flow in a CFB riser based on computational particle fluid dynamics  

Science Journals Connector (OSTI)

A three-dimensional model for gas-solid flow in a circulating fluidized bed (CFB) riser was developed based on computational particle ... experimental data validated the CPFD model for the CFB riser. The model pr...

Yinghui Zhang; Xingying Lan; Jinsen Gao

2012-12-01T23:59:59.000Z

85

Mathematical Model for Heavy OilWaterGas Stratified Flow in Horizontal Pipes  

Science Journals Connector (OSTI)

A one-dimensional, isothermal, transient model for the stratified flow of heavy oil, water and gas, in horizontal pipelines, is presented. The two-fluid mathematical model consists of mass, momentum and energy...

C. Centeno-Reyes; O. Cazarez-Candia

2012-01-01T23:59:59.000Z

86

Selective Dissociation of Sulfur Hexafluoride by Intense CO2 Laser Radiation in Pulsed Gas Dynamic Flow  

Science Journals Connector (OSTI)

Isotopically selective IR multiphoton dissociation (MPD) of SF6 in a pulsed gas dynamic flow was studied. The dependence of the yield of the product SF4 on the frequency of CO2 laser radiation exciting SF6 molecu...

G. N. Makarov; A. N. Petin

2000-11-01T23:59:59.000Z

87

Biomass gasification using a horizontal entrained-flow gasifier and catalytic processing of the product gas.  

E-Print Network (OSTI)

??A novel study on biomass-air gasification using a horizontal entrained-flow gasifier and catalytic processing of the product gas has been conducted. The study was designed (more)

Legonda, Isack Amos

2012-01-01T23:59:59.000Z

88

Effect of Cooling Flow on the Operation of a Hot Rotor-Gas Foil Bearing System  

E-Print Network (OSTI)

Gas foil bearings (GFBs) operating at high temperature rely on thermal management procedures that supply needed cooling flow streams to keep the bearing and rotor from overheating. Poor thermal management not only makes systems inefficient...

Ryu, Keun

2012-02-14T23:59:59.000Z

89

A field example of a gas orifice meter with debris-ridden liquid in mist flow  

SciTech Connect

A field example of debris-ridden liquids in an orifice meter is presented in this paper. Flow conditions in gas pipelines containing hydrocarbon liquids and particulate matter are discussed. Known effects on measurement of the presence of these materials in orifice meters is presented. By definition, gas measurement is accurate if performed on a clean and dry flow stream. This paper demonstrates the importance of removing as much liquid and debris as possible prior to measurement.

Chisholm, J.L.; Mooney, C.V. [Texas A and M Univ., Kingsville, TX (United States); Datta-Barua, L.; Feldmann, R.J.

1995-12-31T23:59:59.000Z

90

The impact of gravity segregation on multiphase non-Darcy flow in hydraulically fractured gas wells  

E-Print Network (OSTI)

THE IMPACT OF GRAVITY SEGREGATION ON MULTIPHASE NON-DARCY FLOW IN HYDRAULICALLY FRACTURED GAS WELLS A Thesis by MARK DICKINS Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment... of the requirements for the degree of MASTER OF SCIENCE August 2008 Major Subject: Petroleum Engineering THE IMPACT OF GRAVITY SEGREGATION ON MULTIPHASE NON-DARCY FLOW IN HYDRAULICALLY FRACTURED GAS WELLS A Thesis by MARK DICKINS...

Dickins, Mark Ian

2008-10-10T23:59:59.000Z

91

A qualitative analysis of non-Darcy flow effects in hydraulically fractured gas wells  

E-Print Network (OSTI)

A QUALITATIVE ANALYSIS OF NON-DARCY FLOW EFFECTS IN HYDRAULICALLY FRACTURED GAS WELLS A Thesis by JOANNE CAROL HRESKO Submitted to the Graduate College of Texas A 5 M University in partial fulfillment of the requirements for the degree... of MASTER OF SCIENCE December 1985 Major Subject: Petroleum Engineering A QUALITATIVE ANALYSIS OF NON-DARCY FLOW EFFECTS IN HYDRAULICALLY FRACTURED GAS WELLS A Thesis by JOANNE CAROL HRESKO Approved as to style and content by: W. J. Lee (Chairman...

Hresko, Joanne Carol

2012-06-07T23:59:59.000Z

92

Upward Gas-Liquid Flow in Concentric and Eccentric Annular Spaces  

E-Print Network (OSTI)

UPWARD GAS-LIQUID FLOW IN CONCENTRIC AND ECCENTRIC ANNULAR SPACES A Thesis by PEDRO CAVALCANTI DE SOUSA Submitted to the Office of Graduate and Professional Studies of Texas A&M University in partial fulfillment... Copyright 2013 Pedro Cavalcanti de Sousa ii ABSTRACT A limited amount of work exists on upward gas-liquid flow in annular spaces. This is a common scenario in drilling operations, especially in underbalanced drilling, and in high-production wells...

Cavalcanti de Sousa, Pedro

2013-12-09T23:59:59.000Z

93

The Gas Flow from the Gas Attenuator to the Beam Line  

SciTech Connect

The gas leak from the gas attenuator to the main beam line of the Linac Coherent Light Source has been evaluated, with the effect of the Knudsen molecular beam included. It has been found that the gas leak from the gas attenuator of the present design, with nitrogen as a working gas, does not exceed 10{sup -5} torr x l/s even at the highest pressure in the main attenuation cell (20 torr).

Ryutov, D.D.

2010-12-03T23:59:59.000Z

94

Sankey Diagram of Onsite Generation in U.S. Manufacturing Sector  

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

The Manufacturing Energy Sankey diagrams illustrate the flow of energy in manufacturing. These diagrams visually complement the Manufacturing Energy and Carbon Footprint analysis.

95

Problem Statement Characterizing the flow of neutral propellant gas  

E-Print Network (OSTI)

anode is important in projecting thruster performance, lifetime and operational stability. Experimental methods to model the flow at the anode exit plane have been created, but are complicated, lack and implemented on the anodes to determine the flow characteristics. Procedure Results: Flame Analysis Figure 1

Walker, Mitchell

96

Aerodynamics of Two Interfering Simple-Shape Bodies in Hypersonic Rarefied-Gas Flows  

E-Print Network (OSTI)

Aerodynamics of Two Interfering Simple-Shape Bodies in Hypersonic Rarefied-Gas Flows Vladimir V and numerical studies [1-4] of aerodynamics of simple shape bodies have provided valuable information related not be used to define the aerodynamics of side-by-side bodies. Flow about two side-by-side cylinders

Riabov, Vladimir V.

97

Characterization of Gas?Liquid Flows in Stirred Vessels Using Pressure and Torque Fluctuations  

Science Journals Connector (OSTI)

Gas?liquid flows in a stirred vessel exhibit different flow regimes and demonstrate complex interaction of transport processes with varying spatio-temporal scales. The knowledge of key space and time scales of fluid dynamics is important for designing and ...

A. R. Khopkar; S. S. Panaskar; A. B. Pandit; V. V. Ranade

2005-03-18T23:59:59.000Z

98

Multiscale, Multiphysics Network Modeling of Shale Matrix Gas Flows  

Science Journals Connector (OSTI)

We present a pore network model to determine the permeability of shale gas matrix. Contrary to the conventional reservoirs, ... morphology of the pores, the permeability in shale depends on pressure as well. In a...

Ayaz Mehmani; Maa Prodanovi?; Farzam Javadpour

2013-09-01T23:59:59.000Z

99

Breviz: Visualizing Spreadsheets using Dataflow Diagrams  

E-Print Network (OSTI)

Spreadsheets are used extensively in industry, often for business critical purposes. In previous work we have analyzed the information needs of spreadsheet professionals and addressed their need for support with the transition of a spreadsheet to a colleague with the generation of data flow diagrams. In this paper we describe the application of these data flow diagrams for the purpose of understanding a spreadsheet with three example cases. We furthermore suggest an additional application of the data flow diagrams: the assessment of the quality of the spreadsheet's design.

Hermans, Felienne; van Deursen, Arie

2011-01-01T23:59:59.000Z

100

New Albany shale gas flow starts in western Indiana  

SciTech Connect

This paper briefly describes the stratigraphy and lithology of the New Albany shale and how this affects the placement of gas recovery wells in the Greene County, Indiana area. It reviews the project planning aspects including salt water reinjection and well spacing for optimum gas recovery. It also briefly touches on how the wells were completed and brought on-line for production and distribution.

NONE

1996-04-29T23:59:59.000Z

Note: This page contains sample records for the topic "gas flow diagram" 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

AEO2011: Primary Natural Gas Flows Entering NGTDM Region from Neighboring  

Open Energy Info (EERE)

Primary Natural Gas Flows Entering NGTDM Region from Neighboring Primary Natural Gas Flows Entering NGTDM Region from Neighboring Regions Dataset Summary Description This dataset comes from the Energy Information Administration (EIA), and is part of the 2011 Annual Energy Outlook Report (AEO2011). This dataset is Table 138, and contains only the reference case. This dataset is in billion cubic feet per year. The data is broken down into New England, Middle Atlantic, East North Central, West Central, South Atlantic, East South Central, West South Central, Mountain, Pacific, Florida, Arizona/New Mexico, California. Source EIA Date Released April 26th, 2011 (3 years ago) Date Updated Unknown Keywords 2011 AEO EIS Natural Gas Data application/vnd.ms-excel icon AEO2011: Primary Natural Gas Flows Entering NGTDM Region from Neighboring Regions- Reference Case (xls, 60 KiB)

102

NETL: News Release - DOE Selects 2 Projects to Help Boost Gas Flow from  

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

August 15, 2001 August 15, 2001 DOE Selects 2 Projects to Help Boost Gas Flow from Low-Permeability Formations New Technologies Targeted at Future Gas Production From "Tight" Formations in Western U.S. MORGANTOWN, WV - America has vast resources of natural gas, but President Bush's National Energy Policy cautions that domestic production of the easier "conventional" gas could peak as early as 2015. To help prepare for the day when the Nation's increasing demand for clean-burning natural gas will have to be met by gas trapped in denser, more difficult-to-produce "unconventional" formations, the U.S. Department of Energy has selected two firms to develop advanced methods for locating and producing these low permeability gas reservoirs.

103

Comparison of electrical capacitance tomography and gamma densitometer measurement in viscous oil-gas flows  

SciTech Connect

Multiphase flow is a common occurrence in industries such as nuclear, process, oil and gas, food and chemical. A prior knowledge of its features and characteristics is essential in the design, control and management of such processes due to its complex nature. Electrical Capacitance Tomography (ECT) and Gamma Densitometer (Gamma) are two promising approaches for multiphase visualization and characterization in process industries. In two phase oil and gas flow, ECT and Gamma are used in multiphase flow monitoring techniques due to their inherent simplicity, robustness, and an ability to withstand wide range of operational temperatures and pressures. High viscous oil (viscosity > 100 cP) is of interest because of its huge reserves, technological advances in its production and unlike conventional oil (oil viscosity < 100 cP) and gas flows where ECT and Gamma have been previously used, high viscous oil and gas flows comes with certain associated concerns which include; increased entrainment of gas bubbles dispersed in oil, shorter and more frequent slugs as well as oil film coatings on the walls of flowing conduits. This study aims to determine the suitability of both devices in the visualization and characterization of high-viscous oil and gas flow. Static tests are performed with both devices and liquid holdup measurements are obtained. Dynamic experiments were also conducted in a 1 and 3 inch facility at Cranfield University with a range of nominal viscosities (1000, 3000 and 7500 cP). Plug, slug and wavy annular flow patterns were identified by means of Probability Mass Function and time series analysis of the data acquired from Gamma and ECT devices with high speed camera used to validate the results. Measured Liquid holdups for both devices were also compared.

Archibong Eso, A.; Zhao, Yabin; Yeung, Hoi [Department of Offshore Process and Energy Systems Engineering, Cranfield University, Cranfield (United Kingdom)

2014-04-11T23:59:59.000Z

104

FROM THE COLOR-MAGNITUDE DIAGRAM OF {omega} CENTAURI AND (SUPER-)ASYMPTOTIC GIANT BRANCH STELLAR MODELS TO A GALACTIC PLANE PASSAGE GAS PURGING CHEMICAL EVOLUTION SCENARIO  

SciTech Connect

We have investigated the color-magnitude diagram of {omega} Centauri and find that the blue main sequence (bMS) can be reproduced only by models that have a helium abundance in the range Y = 0.35-0.40. To explain the faint subgiant branch of the reddest stars ('MS-a/RG-a' sequence), isochrones for the observed metallicity ([Fe/H] Almost-Equal-To -0.7) appear to require both a high age ({approx}13 Gyr) and enhanced CNO abundances ([CNO/Fe] Almost-Equal-To 0.9). Y Almost-Equal-To 0.35 must also be assumed in order to counteract the effects of high CNO on turnoff colors and thereby to obtain a good fit to the relatively blue turnoff of this stellar population. This suggests a short chemical evolution period of time (<1 Gyr) for {omega} Cen. Our intermediate-mass (super-)asymptotic giant branch (AGB) models are able to reproduce the high helium abundances, along with [N/Fe] {approx}2 and substantial O depletions if uncertainties in the treatment of convection are fully taken into account. These abundance features distinguish the bMS stars from the dominant [Fe/H] Almost-Equal-To -1.7 population. The most massive super-AGB stellar models (M{sub ZAMS} {>=} 6.8 M{sub Sun }, M{sub He,core} {>=} 1.245 M{sub Sun }) predict too large N enhancements, which limit their role in contributing to the extreme populations. In order to address the observed central concentration of stars with He-rich abundance, we show here quantitatively that highly He- and N-enriched AGB ejecta have particularly efficient cooling properties. Based on these results and on the reconstruction of the orbit of {omega} Cen with respect to the Milky Way, we propose the Galactic plane passage gas purging scenario for the chemical evolution of this cluster. The bMS population formed shortly after the purging of most of the cluster gas as a result of the passage of {omega} Cen through the Galactic disk (which occurs today every {approx}40 Myr for {omega} Cen) when the initial mass function of the dominant population had 'burned' through most of the Type II supernova mass range. AGB stars would eject most of their masses into the gas-depleted cluster through low-velocity winds that sink to the cluster core due to their favorable cooling properties and form the bMS population. In our discussion we follow our model through four passage events, which could explain some key properties not only of the bMS but also of the MS-a/RGB-a and the s-enriched stars.

Herwig, Falk; VandenBerg, Don A.; Navarro, Julio F. [Department of Physics and Astronomy, University of Victoria, P.O. Box 3055, Victoria, BC V8W 3P6 (Canada); Ferguson, Jason [Department of Physics, Wichita State University Wichita, KS 67260 (United States); Paxton, Bill, E-mail: fherwig@uvic.ca, E-mail: vandenbe@uvic.ca, E-mail: jason.ferguson@wichita.edu, E-mail: paxton@kitp.ucsb.edu [KITP/UC Santa Barbara, Santa Barbara, CA 93106 (United States)

2012-10-01T23:59:59.000Z

105

Automation of Feynman Diagram Evaluation  

E-Print Network (OSTI)

A C-program DIANA (DIagram ANAlyser) for the automation of Feynman diagram evaluations is presented.

M. Tentyukov; J. Fleischer

1998-02-04T23:59:59.000Z

106

Effects of flow paths on tight gas well performance  

E-Print Network (OSTI)

and the production rate for constant pwf case. Equal emphasis is placed on short-term production (hours to a few days) as well as long-term production (1 to 15 years). A wide range of complex flow regime is investigated. A major section of this study deals...

Ganpule, Sameer Vasant

2012-06-07T23:59:59.000Z

107

Using multi-layer models to forecast gas flow rates in tight gas reservoirs  

E-Print Network (OSTI)

.2 Typical Tight Gas Sand Log Interval (Cotton Valley Formation)........................... 3 2.1 Type of Decline Curves by Arps........................................................................... 11 2.2 Fetkovich Type Curves... ......................................................................................... 14 2.3 Fetkovich Type Curves for Gas Wells .................................................................. 15 3.1 Plan View of Hydraulic Fracture and Grid System...............................................30 3.2 History Match...

Jerez Vera, Sergio Armando

2007-04-25T23:59:59.000Z

108

Cyclostrophic adjustment in swirling gas flows and the Ranque-Hilsch vortex tube effect  

SciTech Connect

A theoretical analysis of cyclostrophic adjustment is presented; i.e., adjustment to balance between pressure gradient and centrifugal force in axisymmetric flow of an inviscid gas is examined. The solution to the problem is represented as the sum of a time-independent (balanced) and time-dependent (wave) components. It is shown that the wave component of the flow in an unbounded domain decays with time, and the corresponding solution reduces to the balanced component. In a bounded domain, the balanced flow component exists against the background of undamped acoustic waves. It is found that the balanced flow is thermally stratified at Mach numbers close to unity, with a substantial decrease in gas temperature (to between -50 and -100 deg. C) in the axial region. This finding, combined with the results of special experiments, is used to explain the Ranque-Hilsch vortex tube effect.

Kalashnik, M. V., E-mail: lingel@obninsk.com; Visheratin, K. N. [SPA Typhoon (Russian Federation)], E-mail: kvisher@typhoon.obninsk.ru

2008-04-15T23:59:59.000Z

109

Role of the gas flow parameters on the uniformity of films produced by PECVD technique  

SciTech Connect

The aim of this work is to present an analytical model able to interpret the experimental data of the dependence of film's uniformity on the discharge pressure, gas flow and temperature used during the production of thin films by the plasma enhancement chemical vapor deposition technique, under optimized electrode's geometry and electric field distribution. To do so, the gas flow is considered to be quasi-incompressible and inviscous leading to the establishment of the electro-fluid-mechanics equations able to interpret the film's uniformity over the substrate area, when the discharge process takes place in the low power regime.

Martins, R.; Macarico, A.; Ferreira, I.; Fortunato, E.

1997-07-01T23:59:59.000Z

110

Radial flow has little effect on clusterization at intermediate energies in the framework of the Lattice Gas Model  

E-Print Network (OSTI)

The Lattice Gas Model was extended to incorporate the effect of radial flow. Contrary to popular belief, radial flow has little effect on the clusterization process in intermediate energy heavy-ion collisions except adding an ordered motion to the particles in the fragmentation source. We compared the results from the lattice gas model with and without radial flow to experimental data. We found that charge yields from central collisions are not significantly affected by inclusion of any reasonable radial flow.

C. B. Das; L. Shi; S. Das Gupta

2004-07-20T23:59:59.000Z

111

Quick Notes on CO2 Diagram and Energy Diagram For the ESRP 285 Website (Spring 2008)  

E-Print Network (OSTI)

(CO2) emissions are the largest source of greenhouse gas emissions, accounting for over 80Quick Notes on CO2 Diagram and Energy Diagram For the ESRP 285 Website (Spring 2008) Carbon dioxide% of the emissions in the USA (EIA 2003, p. 35). CO2 emissions arise from the combustion of carbon fuels

Ford, Andrew

112

Gas flow in vertical slots with large horizontal temperature differences  

SciTech Connect

Perfect gas exact solutions to the steady Navier--Stokes equations are given for laminar convective motion in open and closed vertical slots with large temperature differences using Sutherland law transport properties. The solutions are valid a few slot widths away from the ends in the asymptotic region where the opposite hot and cold wall boundary layers are fully merged. It is found that the static pressure (in the closed slot) and temperature and velocity distributions (in all cases) are very sensitive to property variations, even though the heat flux may not be. We observe the net horizontal and vertical heat fluxes to be the same as those obtained from the Boussinesq equations. Comparisons with constant property solutions and the well-known Boussinesq limiting solution for small temperature differences are given for examples using air.

Chenoweth, D.R.; Paolucci, S.

1985-08-01T23:59:59.000Z

113

Closures for Course-Grid Simulation of Fluidized Gas-Particle Flows  

SciTech Connect

Gas-particle flows in fluidized beds and riser reactors are inherently unstable, and they manifest fluctuations over a wide range of length and time scales. Two-fluid models for such flows reveal unstable modes whose length scale is as small as ten particle diameters. Yet, because of limited computational resources, gas-particle flows in large fluidized beds are invariably simulated by solving discretized versions of the two-fluid model equations over a coarse spatial grid. Such coarse-grid simulations do not resolve the small-scale spatial structures which are known to affect the macroscale flow structures both qualitatively and quantitatively. Thus there is a need to develop filtered two-fluid models which are suitable for coarse-grid simulations and capturing the effect of the small-scale structures through closures in terms of the filtered variables. The overall objective of the project is to develop validated closures for filtered two-fluid models for gas-particle flows, with the transport gasifier as a primary, motivating example. In this project, highly resolved three-dimensional simulations of a kinetic theory based two-fluid model for gas-particle flows have been performed and the statistical information on structures in the 100-1000 particle diameters length scale has been extracted. Based on these results, closures for filtered two-fluid models have been constructed. The filtered model equations and closures have been validated against experimental data and the results obtained in highly resolved simulations of gas-particle flows. The proposed project enables more accurate simulations of not only the transport gasifier, but also many other non-reacting and reacting gas-particle flows in a variety of chemical reactors. The results of this study are in the form of closures which can readily be incorporated into existing multi-phase flow codes such as MFIX (www.mfix.org). Therefore, the benefits of this study can be realized quickly. The training provided by this project has prepared a PhD student to enter research and development careers in DOE laboratories or chemicals/energy-related industries.

Sankaran Sundaresan

2010-02-14T23:59:59.000Z

114

Computation of Neutral Gas Flow From a Hall Thruster Into a Vacuum Chamber  

E-Print Network (OSTI)

to model a cold flow of xenon gas expanding from a Hall thruster into a vacuum chamber. The simulations are performed for the P5 Hall thruster operating in a large vacuum tank at the University of Michigan chamber are varied. A key physical parameter in the simulations concerns the probability that a xenon atom

Walker, Mitchell

115

Study of Gas Solid Flow Characteristics in Cyclone Inlet Ducts of A300Mwe CFB Boiler  

Science Journals Connector (OSTI)

Gas solid flow characteristics in cyclones inlet duct of a 300MW CFB boiler were studied in a cold circulating fluidized bed (CFB) experimental setup according to a 410t/h CFB boiler with a scale of 10?1....Figs...

J. Y. Tang; X. F. Lu; J. Lai; H. Z. Liu

2010-01-01T23:59:59.000Z

116

Rapid Solar-thermal Dissociation of Natural Gas in an Aerosol Flow Reactor  

E-Print Network (OSTI)

/or hydrogen powered fuel cell vehicles could help to mitigate the energy supply and environmental problems black production. For solar-thermal processing, where carbon black is sold, fossil energy usageRapid Solar-thermal Dissociation of Natural Gas in an Aerosol Flow Reactor Jaimee Dahl a , Karen

117

Production of Natural Gas and Fluid Flow in Tight Sand Reservoirs  

SciTech Connect

This document reports progress of this research effort in identifying relationships and defining dependencies between macroscopic reservoir parameters strongly affected by microscopic flow dynamics and production well performance in tight gas sand reservoirs. These dependencies are investigated by identifying the main transport mechanisms at the pore scale that should affect fluids flow at the reservoir scale. A critical review of commercial reservoir simulators, used to predict tight sand gas reservoir, revealed that many are poor when used to model fluid flow through tight reservoirs. Conventional simulators ignore altogether or model incorrectly certain phenomena such as, Knudsen diffusion, electro-kinetic effects, ordinary diffusion mechanisms and water vaporization. We studied the effect of Knudsen's number in Klinkenberg's equation and evaluated the effect of different flow regimes on Klinkenberg's parameter b. We developed a model capable of explaining the pressure dependence of this parameter that has been experimentally observed, but not explained in the conventional formalisms. We demonstrated the relevance of this, so far ignored effect, in tight sands reservoir modeling. A 2-D numerical simulator based on equations that capture the above mentioned phenomena was developed. Dynamic implications of new equations are comprehensively discussed in our work and their relative contribution to the flow rate is evaluated. We performed several simulation sensitivity studies that evidenced that, in general terms, our formalism should be implemented in order to get more reliable tight sands gas reservoirs' predictions.

Maria Cecilia Bravo

2006-06-30T23:59:59.000Z

118

Numerical simulation of gas flow through unsaturated fractured rock at Yucca Mountain, Nevada  

SciTech Connect

Numerical analysis is used to identify the physical phenomena associated with barometrically driven gas (air and water vapor) flow through unsaturated fractured rock at Yucca Mountain, Nevada. Results from simple finite difference simulations indicate that for a fractured rock scenario, the maximum velocity of air out of an uncased 10 cm borehole is 0.002 m s{sub {minus}1}. An equivalent porous medium (EPM) model was incorporated into a multiphase, multicomponent simulator to test more complex conceptual models. Results indicate that for a typical June day, a diurnal pressure wave propagates about 160 m into the surrounding Tiva Canyon hydrogeologic unit. Dry air that enters the formation evaporates water around the borehole which reduces capillary pressure. Multiphase countercurrent flow develops in the vicinity of the hole; the gas phase flows into the formation while the liquid phase flows toward the borehole. The effect occurs within 0.5 m of the borehole. The amount of water vapor leaving the formation during 1 day is 900 cm{sup 3}. This is less than 0.1% of the total recharge into the formation, suggesting that the barometric effect may be insignificant in drying the unsaturated zone. However, gas phase velocities out of the borehole (3 m s{sup {minus}1}), indicating that observed flow rates from wells along the east flank of Yucca Mountain were able to be simulated with a barometric model.

Cooper, C.A. [Nevada Univ., Las Vegas, NV (United States). Water Resources Center

1990-01-01T23:59:59.000Z

119

Galactic scale gas flows in colliding galaxies: 3-Dimensional, N-body/hydrodynamics experiments  

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

Galactic Scale Gas Flows in Colliding Galaxies: Galactic Scale Gas Flows in Colliding Galaxies: a-Dimensional, N-bodyjHydrodynamics Experiments Susan A. Lamb* NORDITA and Neils Bohr Institute, Blegdamsvej 17, DK-2100, Kpbenhaven 0, Danmark. Richard A. Gerber University of Illinois at Urbana-Champaign, Departments of Physics and Astronomy, 1110 W. Green Street, Urbana, IL 61801, U.S.A. and Dinshaw S. Balsara t Johns Hopkins University, Department of Physics and Astronomy, Homewood Campu.s, Baltimore, MD 21218, U.S.A. Abstract. We present some result.s from three dimensional computer simulations of collisions between models of equal mass gaJaxies, one of which is a rotating, disk galaxy containing both gas and stars and the other is an elliptical contaiuing stars only. We use fully self consistent models in which the

120

Pore-scale mechanisms of gas flow in tight sand reservoirs  

SciTech Connect

Tight gas sands are unconventional hydrocarbon energy resource storing large volume of natural gas. Microscopy and 3D imaging of reservoir samples at different scales and resolutions provide insights into the coaredo not significantly smaller in size than conventional sandstones, the extremely dense grain packing makes the pore space tortuous, and the porosity is small. In some cases the inter-granular void space is presented by micron-scale slits, whose geometry requires imaging at submicron resolutions. Maximal Inscribed Spheres computations simulate different scenarios of capillary-equilibrium two-phase fluid displacement. For tight sands, the simulations predict an unusually low wetting fluid saturation threshold, at which the non-wetting phase becomes disconnected. Flow simulations in combination with Maximal Inscribed Spheres computations evaluate relative permeability curves. The computations show that at the threshold saturation, when the nonwetting fluid becomes disconnected, the flow of both fluids is practically blocked. The nonwetting phase is immobile due to the disconnectedness, while the permeability to the wetting phase remains essentially equal to zero due to the pore space geometry. This observation explains the Permeability Jail, which was defined earlier by others. The gas is trapped by capillarity, and the brine is immobile due to the dynamic effects. At the same time, in drainage, simulations predict that the mobility of at least one of the fluids is greater than zero at all saturations. A pore-scale model of gas condensate dropout predicts the rate to be proportional to the scalar product of the fluid velocity and pressure gradient. The narrowest constriction in the flow path is subject to the highest rate of condensation. The pore-scale model naturally upscales to the Panfilov's Darcy-scale model, which implies that the condensate dropout rate is proportional to the pressure gradient squared. Pressure gradient is the greatest near the matrix-fracture interface. The distinctive two-phase flow properties of tight sand imply that a small amount of gas condensate can seriously affect the recovery rate by blocking gas flow. Dry gas injection, pressure maintenance, or heating can help to preserve the mobility of gas phase. A small amount of water can increase the mobility of gas condensate.

Silin, D.; Kneafsey, T.J.; Ajo-Franklin, J.B.; Nico, P.

2010-11-30T23:59:59.000Z

Note: This page contains sample records for the topic "gas flow diagram" 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

Application of convolution theory for solving non-linear flow problems: gas flow systems  

E-Print Network (OSTI)

. . . . . . . . . . . . 15 3. 2. 1 Generalized Analytical Solution for Real Gas Systems . . . . . . . . 15 3. 2. 2 Dry Gas Material Balance Relations: P(tn) - g(u) Identity. . . . . . 16 3. 3 Functional and Numerical Data Models for the Non-Linear CHAPTER IV Component... 5 4. 6 4. 7 4. 8 4. 9 Numerical Model for the (/igcg);/(/tgcg) Data Function Based on Roumboutsos and Stewart Algorithm for Transforming Data into the Laplace Domain. . (p;cg, )/(peg) Versus (p/zj/(p, /z;) (y?= 0. 7 (air = 1. 0), T = 50 'F...

Mireles, Thomas Joseph

2012-06-07T23:59:59.000Z

122

Turbine exhaust diffuser with a gas jet producing a coanda effect flow control  

DOE Patents (OSTI)

An exhaust diffuser system and method for a turbine engine includes an inner boundary and an outer boundary with a flow path defined therebetween. The inner boundary is defined at least in part by a hub structure that has an upstream end and a downstream end. The outer boundary may include a region in which the outer boundary extends radially inward toward the hub structure and may direct at least a portion of an exhaust flow in the diffuser toward the hub structure. The hub structure includes at least one jet exit located on the hub structure adjacent to the upstream end of the tail cone. The jet exit discharges a flow of gas substantially tangential to an outer surface of the tail cone to produce a Coanda effect and direct a portion of the exhaust flow in the diffuser toward the inner boundary.

Orosa, John; Montgomery, Matthew

2014-02-11T23:59:59.000Z

123

Output-power fluctuations of flowing-gas CO/sub 2/ lasers with unstable resonators  

SciTech Connect

An experimental study was made of the influence of different factors on the stability of the output intensity of a flowing-gas CO/sub 2/ laser with an unstable resonator. The measured amplitude--frequency characteristics of the intensity fluctuation spectrum had resonance peaks at multiples of the frequency corresponding to the transit time of the gas to the optic axis of the resonator. A rise in the efficiency of the laser system was found to be accompanied by an increase in the amplitude of the fluctuations of the radiation intensity.

Artamonov, A.V.; Konev, V.A.; Likhanskii, V.V.; Napartovich, A.P.

1984-06-01T23:59:59.000Z

124

HERA-B Gas Systems The gas mixture, the gas volume of the corresponding detector and the required gas flow are given. All detectors are operating at nominal  

E-Print Network (OSTI)

stations in external gas hut 6 nonflammable pressure reducer stations CF4, Xe, CO2, Ar/CF4, reserve, reserve 3 flammable pressure reducer stations C2H6O, CH4, Ar/CH4 2 stations for cool liquids Ar, N2 4 gas stations without recyling ITR, high pt inner, high pt outer, Muon pixel 4 gas stations with gas recyling

125

Integrability and MHV diagrams  

E-Print Network (OSTI)

We apply MHV diagrams to the derivation of the one-loop dilatation operator of N=4 super Yang-Mills in the SO(6) sector. We find that in this approach the calculation reduces to the evaluation of a single MHV diagram in dimensional regularisation. This provides the first application of MHV diagrams to an off-shell quantity. We also discuss other applications of the method and future directions.

Brandhuber, Andreas; Travaglini, Gabriele; Young, Donovan

2014-01-01T23:59:59.000Z

126

Hybrid Particle-Continuum Methods for Nonequilibrium Gas and Plasma Flows  

SciTech Connect

Two different hybrid particle-continuum methods are described for simulation of nonequilibrium gas and plasma dynamics. The first technique, used for nonequilibrium hypersonic gas flows, uses either a continuum description or a particle method throughout a flow domain based on local conditions. This technique is successful in reproducing the results of full particle simulations at a small fraction of the cost. The second method uses a continuum model of the electrons combined with a particle description of the ions and atoms for simulating plasma jets. The physical accuracy of the method is assessed through comparisons with plasma plume measurements obtained in space. These examples illustrate that the complex physical phenomena associated with nonequilibrium conditions can be simulated with physical accuracy and numerical efficiency using such hybrid approaches.

Boyd, Iain D. [Department of Aerospace Engineering, University of Michigan, Ann Arbor, MI (United States)

2011-05-20T23:59:59.000Z

127

Numerical analysis of hypersonic continuum and rarefied gas flows near blunt probes is presented under conditions of intensive gas blowing from the surface.  

E-Print Network (OSTI)

1 Abstract Numerical analysis of hypersonic continuum and rarefied gas flows near blunt probes injection, hydrogen combustion, hypersonic flow, exponential box-scheme, direct-simulation Monte-Carlo method. 1 Introduction Numerical and experimental studies [1, 2] of aerothermodynamics of hypersonic

Riabov, Vladimir V.

128

A phenomenological model for rarefied gas flows in thin film slider bearings  

E-Print Network (OSTI)

: Mechanical Engineering 111 ABSTRACT A Phenoineiiological Ivlodel for Rarefied Gas Flows in Thin Film Slider Bearings. (Dpcpmbpi' 200'2) Pradipkuinsr Bahukuduiiibi, B. E. , University of Madras Chair of Advisory Committee: Dr. Ali Beskok IVc analyze... an amazing long-distance arlvisor and i. ritic. I love you all. TABLE OF CONTENTS CHAPTER IUTRODUCTION A. Backgroun&l B. Literature Survey C Specific Objectives D. Oigaiiizatiori of Thesis E. Nomenclature REVIEW OF REY'UOLDS LUBRICATION EQUATIONS A...

Bahukudumbi, Pradipkumar

2012-06-07T23:59:59.000Z

129

Effect of Continuous, Trapped, and Flowing Gas on Performance of Alkaline Surfactant Polymer (ASP) Flooding  

Science Journals Connector (OSTI)

Alkali Surfactant Polymer (ASP) flooding has traditionally been considered in tertiary mode, i.e., after a reservoir has been sufficiently water flooded. ... and flow properties of an ASP flood are captured to calibrate a comprehensive reservoir-simulation model. ... Roshanfekr, M.; Johns, R. T.; Pope, G.; Britton, L.; Linnemeyer, H.; Britton, C.; Vyssotski, A.Simulation of the Effect of Pressure and Solution Gas on Oil Recovery From Surfactant/Polymer Floods SPE J. 2012, 17 ( 3) 705 ...

R. Farajzadeh; A. Ameri; M. J. Faber; D. W. van Batenburg; D. M. Boersma; J. Bruining

2013-08-22T23:59:59.000Z

130

Experimental Study on Gas-Solid Flow Charcteristics in a CFB Riser Of 54M in Height  

Science Journals Connector (OSTI)

Understanding the height effect on the gas-solid flow characteristics in a CFB riser is important as more and more large capacity CFB boilers are used and to be developed. In this study, a cold CFB test rig with ...

N. Hu; H. R. Yang; H. Zhang; R. Q. Zhang

2010-01-01T23:59:59.000Z

131

characterization and visualization of two-phase flow properties of gas diffusion layers used in a PEM fuel cell  

E-Print Network (OSTI)

Due to the low-temperature operation of Polymer Electrolyte Membrane fuel cell (PEMFC), liquid water can build up in either flow channels or gas diffusion layers (GDL). Better understanding of the effect of two-phase ...

Gao, Yan

2011-04-26T23:59:59.000Z

132

Momentum, energy and scalar transport in polydisperse gas-solid flows using particle-resolved direct numerical simulations.  

E-Print Network (OSTI)

??Gas-solid flows are commonly encountered in Nature and in several industrial applications. Emerging carbon-neutral or carbon negative technologies such as chemical looping combustion and CO2 (more)

Tenneti, Sudheer

2013-01-01T23:59:59.000Z

133

Optimal fracture treatment design for dry gas wells maximizes well performance in the presence of non-Darcy flow effects  

E-Print Network (OSTI)

This thesis presents a methodology based on Proppant Number approach for optimal fracture treatment design of natural gas wells considering non-Darcy flow effects in the design process. Closure stress is taken into account, by default, because...

Lopez Hernandez, Henry De Jesus

2004-11-15T23:59:59.000Z

134

Numerical simulations of the Macondo well blowout reveal strong control of oil flow by reservoir permeability and exsolution of gas  

E-Print Network (OSTI)

simulation of reservoir depletion and oil flow from themodel included the oil reservoir and the well with a toppressures of the deep oil reservoir, to a two-phase oil-gas

Oldenburg, C.M.

2013-01-01T23:59:59.000Z

135

Production of Natural Gas and Fluid Flow in Tight Sand Reservoirs  

SciTech Connect

This document reports progress of this research effort in identifying possible relationships and defining dependencies between macroscopic reservoir parameters strongly affected by microscopic flow dynamics and production well performance in tight gas sand reservoirs. Based on a critical review of the available literature, a better understanding of the main weaknesses of the current state of the art of modeling and simulation for tight sand reservoirs has been reached. Progress has been made in the development and implementation of a simple reservoir simulator that is still able to overcome some of the deficiencies detected. The simulator will be used to quantify the impact of microscopic phenomena in the macroscopic behavior of tight sand gas reservoirs. Phenomena such as, Knudsen diffusion, electro-kinetic effects, ordinary diffusion mechanisms and water vaporization are being considered as part of this study. To date, the adequate modeling of gas slippage in porous media has been determined to be of great relevance in order to explain unexpected fluid flow behavior in tight sand reservoirs.

Maria Cecilia Bravo; Mariano Gurfinkel

2005-06-30T23:59:59.000Z

136

ACCRETION OF GAS ONTO GAP-OPENING PLANETS AND CIRCUMPLANETARY FLOW STRUCTURE IN MAGNETIZED TURBULENT DISKS  

SciTech Connect

We have performed three-dimensional magnetohydrodynamical simulations of stellar accretion disks, using the PLUTO code, and studied the accretion of gas onto a Jupiter-mass planet and the structure of the circumplanetary gas flow after opening a gap in the disk. We compare our results with simulations of laminar, yet viscous disks with different levels of an {alpha}-type viscosity. In all cases, we find that the accretion flow across the surface of the Hill sphere of the planet is not spherically or azimuthally symmetric, and is predominantly restricted to the mid-plane region of the disk. Even in the turbulent case, we find no significant vertical flow of mass into the Hill sphere. The outer parts of the circumplanetary disk are shown to rotate significantly below Keplerian speed, independent of viscosity, while the circumplanetary disk density (therefore the angular momentum) increases with viscosity. For a simulation of a magnetized turbulent disk, where the global averaged alpha stress is {alpha}{sub MHD} = 10{sup -3}, we find the accretion rate onto the planet to be M-dot {approx}2 Multiplication-Sign 10{sup -6}M{sub J} yr{sup -1} for a gap surface density of 12 g cm{sup -2}. This is about a third of the accretion rate obtained in a laminar viscous simulation with equivalent {alpha} parameter.

Uribe, A. L. [University of Chicago, Chicago, IL 60637 (United States); Klahr, H.; Henning, Th., E-mail: uribe@oddjob.uchicago.edu [Max-Planck-Institut fuer Astronomie, Heidelberg (Germany)

2013-06-01T23:59:59.000Z

137

The modeling and calculation of sound radiation from facilities with gas flowed pipes  

Science Journals Connector (OSTI)

Computer modeling of industrial facilities like chemical plants refineries or other production areas is the first and most important step in the calculation of sound exposure in the environment. The pipework with gas flows is often contributing relevant to the sound radiation of the complete facility. This radiation can be determined applying the methods described in technical papers like VDI 3733 and ISO 15664. On the basis of these descriptions a software tool was developed that allows to create pipework in 3D models with line sources and to calculate the sound propagation with methods like ISO 9613-2. The line sources are linked with the technical parameters like pipe cross section flow rate pressure density and temperature of the gas and material parameters of the pipe wall. The sound power emission from the pipe to the environment and the internal flow of sound powerlinked to the next section of pipingis calculated on the basis of these parameters. The same technique is used to calculate the sound emission of cooling towers electric and fuel driven motors gears pumps and other devices. This powerful technique allows creating sustainable models that can be adapted to different operation conditions with minimum time and effort.

2013-01-01T23:59:59.000Z

138

The modeling and calculation of sound radiation from facilities with gas flowed pipes  

Science Journals Connector (OSTI)

Computer modeling of industrial facilities like chemical plants refineries or other production areas is the first and most important step in the calculation of sound exposure in the environment. The pipework with gas flows is often contributing relevant to the sound radiation of the complete facility. This radiation can be determined applying the methods described in technical papers like VDI3733 and ISO15664. On the basis of these descriptions a software tool was developed that allows to create pipework in 3D models with line sources and to calculate the sound propagation with methods like ISO9613-2. The line sources are linked with the technical parameters like pipe cross section flow rate pressure density and temperature of the gas and material parameters of the pipe wall. The sound power emission from the pipe to the environment and the internal flow of sound power - linked to the next section of piping - is calculated on the basis of these parameters. The same technique is used to calculate the sound emission of cooling towers electric and fuel driven motors gears pumps and other devices. This powerful technique allows creating sustainable models that can be adapted to different operation conditions with minimum time and effort.

Fabian Probst

2013-01-01T23:59:59.000Z

139

Lattice Boltzmann method and gas-kinetic BGK scheme in the low-Mach number viscous flow simulations  

E-Print Network (OSTI)

Lattice Boltzmann method and gas-kinetic BGK scheme in the low-Mach number viscous flow simulations 2002; received in revised form 23 April 2003; accepted 5 May 2003 Abstract Both lattice Boltzmann Elsevier B.V. All rights reserved. AMS: 65M06; 65N06; 76P05; 76T05 Keywords: Lattice Boltzmann method; Gas

Xu, Kun

140

DEVELOPMENT OF A LOW COST INFERENTIAL NATURAL GAS ENERGY FLOW RATE PROTOTYPE RETROFIT MODULE  

SciTech Connect

In 1998, Southwest Research Institute began a multi-year project to develop a working prototype instrument module for natural gas energy measurement. The module will be used to retrofit a natural gas custody transfer flow meter for energy measurement, at a cost an order of magnitude lower than a gas chromatograph. Development and evaluation of the prototype energy meter in 2002-2003 included: (1) refinement of the algorithm used to infer properties of the natural gas stream, such as heating value; (2) evaluation of potential sensing technologies for nitrogen content, improvements in carbon dioxide measurements, and improvements in ultrasonic measurement technology and signal processing for improved speed of sound measurements; (3) design, fabrication and testing of a new prototype energy meter module incorporating these algorithm and sensor refinements; and (4) laboratory and field performance tests of the original and modified energy meter modules. Field tests of the original energy meter module have provided results in close agreement with an onsite gas chromatograph. The original algorithm has also been tested at a field site as a stand-alone application using measurements from in situ instruments, and has demonstrated its usefulness as a diagnostic tool. The algorithm has been revised to use measurement technologies existing in the module to measure the gas stream at multiple states and infer nitrogen content. The instrumentation module has also been modified to incorporate recent improvements in CO{sub 2} and sound speed sensing technology. Laboratory testing of the upgraded module has identified additional testing needed to attain the target accuracy in sound speed measurements and heating value.

E. Kelner; D. George; T. Morrow; T. Owen; M. Nored; R. Burkey; A. Minachi

2005-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "gas flow diagram" 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

Interfacial Friction in Gas-Liquid Annular Flow: Analogies to Full and Transition Roughness  

SciTech Connect

New film thickness and pressure gradient data were obtained in a 5.08 by 101.6 mm duct for nitrogen and water in annular flow. Pressures of 3.4 and 17 atm and temperatures of 38 and 93 C were used to vary the gas density and liquid viscosity. These data are used to compute interfacial shear stresses and interfacial friction factors for comparison with several accepted literature correlations. These comparisons are reasonable for small values of the relative film thickness. However, the new data cover conditions not approached by the data used to construct those correlations. By combining the current data with the results of two other comprehensive modern experimental studies, a new correlation for the interfacial friction factor has been developed. This correlation adds elements of transition roughness to Wallis' fully-rough analogy to better predict interfacial friction factors over a wide range of gas Reynolds numbers and liquid film thicknesses.

Bauer, R.C.; Beus, S.G.; Fore, L.B.

1999-03-01T23:59:59.000Z

142

Characterization of the reactive flow field dynamics in a gas turbine injector using high frequency PIV  

E-Print Network (OSTI)

The present work details the analysis of the aerodynamics of an experimental swirl stabilized burner representative of gas turbine combustors. This analysis is carried out using High Frequency PIV (HFPIV) measurements in a reactive situation. While this information is usually available at a rather low rate, temporally resolved PIV measurements are necessary to better understand highly turbulent swirled flows, which are unsteady by nature. Thanks to recent technical improvements, a PIV system working at 12 kHz has been developed to study this experimental combustor flow field. Statistical quantities of the burner are first obtained and analyzed, and the measurement quality is checked, then a temporal analysis of the velocity field is carried out, indicating that large coherent structures periodically appear in the combustion chamber. The frequency of these structures is very close to the quarter wave mode of the chamber, giving a possible explanation for combustion instability coupling.

Barbosa, Sverine; Ducruix, Sbastien

2008-01-01T23:59:59.000Z

143

CFD evaluation of pipeline gas stratification at low fluid flow due to temperature effects  

E-Print Network (OSTI)

variance in chord averaged velocities is apparent at these conditions. CFD analysis was performed. Low flow velocities of 0.1524 m/sec, 0.3048 m/sec and 0.6096 m/sec and temperature differences of 5.5 o K, 13.8 o K and 27.7 o K were considered. When... with gas velocity below 0.6096 m/sec. v DEDICATION To my family for their love and support. vi ACKNOWLEDGMENTS I would like to express my gratitude to Dr. Gerald Morrison for his valuable guidance and support. I...

Brar, Pardeep Singh

2005-02-17T23:59:59.000Z

144

Efficient boron nitride nanotube formation via combined laser-gas flow levitation  

DOE Patents (OSTI)

A process for producing boron nitride nanotubes and/or boron-carbon-nitrogen nanotubes of the general formula B.sub.xC.sub.yN.sub.z. The process utilizes a combination of laser light and nitrogen gas flow to support a boron ball target during heating of the boron ball target and production of a boron vapor plume which reacts with nitrogen or nitrogen and carbon to produce boron nitride nanotubes and/or boron-carbon-nitrogen nanotubes of the general formula B.sub.xC.sub.yN.sub.z.

Whitney, R. Roy; Jordan, Kevin; Smith, Michael

2014-03-18T23:59:59.000Z

145

Fundamentals of Natural Gas and Species Flows from Hydrate Dissociation - Applications to Safety and Sea Floor Instability  

SciTech Connect

Semi-analytical computational models for natural gas flow in hydrate reservoirs were developed and the effects of variations in porosity and permeability on pressure and temperature profiles and the movement of a dissociation front were studied. Experimental data for variations of gas pressure and temperature during propane hydrate formation and dissociation for crushed ice and mixture of crushed ice and glass beads under laboratory environment were obtained. A thermodynamically consistent model for multiphase liquid-gas flows trough porous media was developed. Numerical models for hydrate dissociation process in one dimensional and axisymmetric reservoir were performed. The computational model solved the general governing equations without the need for linearization. A detail module for multidimensional analysis of hydrate dissociation which make use of the FLUENT code was developed. The new model accounts for gas and liquid water flow and uses the Kim-Boshnoi model for hydrate dissociation.

Goodarz Ahmadi

2006-09-30T23:59:59.000Z

146

Flow Mapping in a Gas-Solid Riser via Computer Automated Radioactive Particle Tracking (CARPT)  

SciTech Connect

Statement of the Problem: Developing and disseminating a general and experimentally validated model for turbulent multiphase fluid dynamics suitable for engineering design purposes in industrial scale applications of riser reactors and pneumatic conveying, require collecting reliable data on solids trajectories, velocities ? averaged and instantaneous, solids holdup distribution and solids fluxes in the riser as a function of operating conditions. Such data are currently not available on the same system. Multiphase Fluid Dynamics Research Consortium (MFDRC) was established to address these issues on a chosen example of circulating fluidized bed (CFB) reactor, which is widely used in petroleum and chemical industry including coal combustion. This project addresses the problem of lacking reliable data to advance CFB technology. Project Objectives: The objective of this project is to advance the understanding of the solids flow pattern and mixing in a well-developed flow region of a gas-solid riser, operated at different gas flow rates and solids loading using the state-of-the-art non-intrusive measurements. This work creates an insight and reliable database for local solids fluid-dynamic quantities in a pilot-plant scale CFB, which can then be used to validate/develop phenomenological models for the riser. This study also attempts to provide benchmark data for validation of Computational Fluid Dynamic (CFD) codes and their current closures. Technical Approach: Non-Invasive Computer Automated Radioactive Particle Tracking (CARPT) technique provides complete Eulerian solids flow field (time average velocity map and various turbulence parameters such as the Reynolds stresses, turbulent kinetic energy, and eddy diffusivities). It also gives directly the Lagrangian information of solids flow and yields the true solids residence time distribution (RTD). Another radiation based technique, Computed Tomography (CT) yields detailed time averaged local holdup profiles at various planes. Together, these two techniques can provide the needed local solids flow dynamic information for the same setup under identical operating conditions, and the data obtained can be used as a benchmark for development, and refinement of the appropriate riser models. For the above reasons these two techniques were implemented in this study on a fully developed section of the riser. To derive the global mixing information in the riser, accurate solids RTD is needed and was obtained by monitoring the entry and exit of a single radioactive tracer. Other global parameters such as Cycle Time Distribution (CTD), overall solids holdup in the riser, solids recycle percentage at the bottom section of the riser were evaluated from different solids travel time distributions. Besides, to measure accurately and in-situ the overall solids mass flux, a novel method was applied.

Muthanna Al-Dahhan; Milorad P. Dudukovic; Satish Bhusarapu; Timothy J. O'hern; Steven Trujillo; Michael R. Prairie

2005-06-04T23:59:59.000Z

147

A 1-D gas dynamics code for subsonic and supersonic flows applied to predict EGR levels in a heavy-duty diesel engine  

Science Journals Connector (OSTI)

The development of a 1-D gas dynamics code for unsteady flow in internal combustion (IC) engines as well as its validation and application for predicting residual gas fraction are introduced in this paper. Some new approaches are presented for modelling flows in diverging ducts and for treating boundary conditions. These include the use of flow resistance correlation to describe separated flows and flows in bends. Excellent agreement with analytical solutions and test results has been obtained when the code was validated with fundamental gas dynamic problems, including converging-diverging nozzle flows with and without shocks; Fanno and Rayleigh flows; the Riemann shock tube problem; and engine rig experiments for modelling flow with different property gases. The code has been applied satisfactorily to predict the gas exchange process of a spark ignition (SI) engine following exhaust blow-down and exhaust gas recirculation (EGR) levels in a heavy-duty diesel engine.

Yuhua Zhu; R.D. Reitz

1999-01-01T23:59:59.000Z

148

Two phase partially miscible flow and transport modeling in porous media: application to gas migration in a nuclear waste repository  

E-Print Network (OSTI)

We derive a compositional compressible two-phase, liquid and gas, flow model for numerical simulations of hydrogen migration in deep geological repository for radioactive waste. This model includes capillary effects and the gas high diffusivity. Moreover, it is written in variables (total hydrogen mass density and liquid pressure) chosen in order to be consistent with gas appearance or disappearance. We discuss the well possedness of this model and give some computational evidences of its adequacy to simulate gas generation in a water saturated repository.

Alain Bourgeat; Mladen Jurak; Farid Sma

2008-02-29T23:59:59.000Z

149

Two phase partially miscible flow and transport modeling in porous media: application to gas migration in a nuclear waste repository  

E-Print Network (OSTI)

We derive a compositional compressible two-phase, liquid and gas, flow model for numerical simulations of hydrogen migration in deep geological repository for radioactive waste. This model includes capillary effects and the gas high diffusivity. Moreover, it is written in variables (total hydrogen mass density and liquid pressure) chosen in order to be consistent with gas appearance or disappearance. We discuss the well possedness of this model and give some computational evidences of its adequacy to simulate gas generation in a water saturated repository.

Bourgeat, Alain; Sma, Farid

2008-01-01T23:59:59.000Z

150

Pore-scale mechanisms of gas flow in tight sand reservoirs  

E-Print Network (OSTI)

include tight gas sands, gas shales, and coal-bed methane.Figure 3. Although the gas-shale production grows at a

Silin, D.

2011-01-01T23:59:59.000Z

151

Stellar Gas Flows Into A Dark Cluster Potential At The Galactic Center  

E-Print Network (OSTI)

The evidence for the presence of a concentration of dark matter at the Galactic center is now very compelling. There is no question that the stellar and gas kinematics within 0.01 pc is dominated by under-luminous matter in the form of either a massive black hole, a highly condensed distribution of stellar remnants, or a more exotic source of gravity. The unique, compact radio source Sgr A* appears to be coincident with the center of this region, but its size (less than 3x10^14 cm at lambda=1.35cm) is still significantly smaller than the current limiting volume enclosing this mass. Sgr A* may be the black hole, if the dark matter distribution is point-like. If not, we are left with a puzzle regarding its nature, and a question of why this source should be so unique and lie only at the Galactic center. Here, we examine an alternative to the black hole paradigm---that the gravitating matter is a condensed cluster of stellar remnants---and study the properties of the Galactic center wind flowing through this region. Some of this gas is trapped in the cluster potential, and we study in detail whether this hot, magnetized gas is in the proper physical state to produce Sgr A*'s spectrum. We find that at least for the Galactic center environment, the temperature of the trapped gas never attains the value required for significant GHz emission. In addition, continuum (mostly bremsstrahlung) emission at higher frequencies is below the current measurements and upper limits for this source. We conclude that the cluster potential is too shallow for the trapped Galactic center wind to account for Sgr A*'s spectrum, which instead appears to be produced only within an environment that has a steep-gradient potential like that generated by a black hole.

Fulvio Melia; Robert Coker

1998-06-14T23:59:59.000Z

152

Gasliquid two-phase flow patterns in a miniature square channel with a gas permeable sidewall  

E-Print Network (OSTI)

methanol fuel cells. Flow patterns in both vertical upward and horizontal flows were identified using in vertical downward flows; and Kosterin [5] and Brigham et al. [6] discussed flow patterns in inclined-phase flow of air�water mixtures in horizontal pipes, the flow patterns and flow regime maps for five glass

Zhao, Tianshou

153

Performance relationship diagrams  

SciTech Connect

By describing a business function's cost drivers and graphically depicting the interrelated cost drivers serving as controls and resources to them, a visual performance model can be provided. A graphical technique, called performance relationship diagraming, has been devised that logically describes these cost drivers and their interrelationships. 2 figs.

Cary, M.J.

1991-11-01T23:59:59.000Z

154

Model simulation and experiments of flow and mass transport through a nano-material gas filter  

SciTech Connect

A computational model for evaluating the performance of nano-material packed-bed filters was developed. The porous effects of the momentum and mass transport within the filter bed were simulated. For the momentum transport, an extended Ergun-type model was employed and the energy loss (pressure drop) along the packed-bed was simulated and compared with measurement. For the mass transport, a bulk dsorption model was developed to study the adsorption process (breakthrough behavior). Various types of porous materials and gas flows were tested in the filter system where the mathematical models used in the porous substrate were implemented and validated by comparing with experimental data and analytical solutions under similar conditions. Good agreements were obtained between experiments and model predictions.

Yang, Xiaofan; Zheng, Zhongquan C.; Winecki, Slawomir; Eckels, Steve

2013-11-01T23:59:59.000Z

155

DESIGN AND DEVELOPMENT OF GAS-LIQUID CYLINDRICAL CYCLONE COMPACT SEPARATORS FOR THREE-PHASE FLOW  

SciTech Connect

The U.S. Department of Energy (DOE) has awarded a five-year (1997-2002) grant (Mohan and Shoham, DE-FG26-97BC15024, 1997) to The University of Tulsa, to develop compact multiphase separation components for 3-phase flow. The research activities of this project have been conducted through cost sharing by the member companies of the Tulsa University Separation Technology Projects (TUSTP) research consortium and the Oklahoma Center for the Advancement of Science and Technology (OCAST). As part of this project, several individual compact separation components have been developed for onshore and offshore applications. These include gas-liquid cylindrical cyclones (GLCC{copyright}), liquid-liquid cylindrical cyclones (LLCC{copyright}), and the gas-liquid-liquid cylindrical cyclones (GLLCC{copyright}). A detailed study has also been completed for the liquid-liquid hydrocyclones (LLHC). Appropriate control strategies have been developed for proper operation of the GLCC{copyright} and LLCC{copyright}. Testing of GLCC{copyright} at high pressure and real crude conditions for field applications is also completed. Limited studies have been conducted on flow conditioning devices to be used upstream of the compact separators for performance improvement. This report presents a brief overview of the activities and tasks accomplished during the 5-year project period, October 1, 1997-March 31, 2003 (including the no-cost extended period of 6 months). An executive summary is presented initially followed by the tasks of the 5-year budget periods. Then, detailed description of the experimental and modeling investigations are presented. Subsequently, the technical and scientific results of the activities of this project period are presented with some discussions. The findings of this investigation are summarized in the ''Conclusions'' section, followed by relevant references. The publications resulting from this study in the form of MS Theses, Ph.D. Dissertation, Journal Papers and Conference Presentations are provided at the end of this report.

Dr. Ram S. Mohan; Dr. Ovadia Shoham

2003-06-25T23:59:59.000Z

156

COARSE-GRID SIMULATION OF REACTING AND NON-REACTING GAS-PARTICLE FLOWS  

SciTech Connect

The principal goal of this project, funded under the ''DOE Vision 21 Virtual Demonstration Initiative'' is virtual demonstration of circulating fluidized bed performance. We had proposed a ''virtual demonstration tool'', which is based on the open-domain CFD code MFIX. The principal challenge funded through this grant is to devise and implement in this CFD code sound physical models for the rheological characteristics of the gas-particle mixtures. Within the past year, which was the third year of the project, we have made the following specific advances. (a) We have completed a study of the impact of sub-grid models of different levels of detail on the results obtained in coarse-grid simulations of gas-particle flow. (b) We have also completed a study of a model problem to understand the effect of wall friction, which was proved in our earlier work to be very important for stable operation of standpipes in a circulating fluidized bed circuit. These are described in a greater detail in this report.

Sankaran Sundaresan

2004-03-01T23:59:59.000Z

157

Transient behavior of simultaneous flow of gas and surfactant solution in consolidated porous media  

SciTech Connect

The main objective of this experimental research was to investigate the mechanisms of foam generation and propagation in porous media. Results obtained give an insight into the conditions of foam generation and propagation in porous media. The rate of propagation of foam is determined by the rates of lamellae generation, destruction, and trapping. Several of the factors that contribute to foam generation have studied with Chevron Chaser SD1000 surfactant. Interfacial tension (IFT) measurements were performed using a spinning drop apparatus. The IFT of two surfactant samples of different concentrations were measured with dodecane and crude oil from the Huntington Beach Field as a function of temperature and time. Foam was used as an oil-displacing fluid. However, when displacing oil, foam was not any more effective than simultaneous brine and gas injection. A series of experiments was performed to study the conditions of foam generation in Berea sandstone cores. Results show that foam may be generated in sandstone at low flow velocities after extended incubation periods. The effect of pregenerating foam before injection into the sandstone was also studied. The pressure profiles in the core were monitored using three pressure taps along the length of the core. A systematic study of foaming with different fluid velocities and foam qualities provides extensive data for foam flow conditions. 134 refs., 57 figs., 2 tabs.

Baghdikian, S.Y.; Handy, L.L.

1991-07-01T23:59:59.000Z

158

Integrated modeling and experimental programs to predict brine and gas flow at the Waste Isolation Pilot Plant  

SciTech Connect

Evaluation of the performance of the WIPP repository involves modeling of brine and gas flow in the host rocks of the Salado Formation, which consist of halite and anhydrite interbeds. Numerous physical, chemical, and structural processes, must be understood to perform this modeling. Gas generation within the repository is strongly coupled to the amount of brine inflow to the repository because brine aids in the corrosion of metals and associated generation of hydrogen gas. Increasing gas pressure in the repository decreases the rate of brine inflow. Ultimately, the gas pressure may exceed the brine pressure and gas may flow out of the repository. Relative-permeability curves and a correlation between threshold pressure and permeability taken from studies reported in the literature were used in PA models prior to being experimentally verified as appropriate for WIPP. In addition, interbed permeabilities were treated as constant and independent of effective stress in early models. Subsequently, the process of interbed fracturing (or fracture dilation) was recognized to limit gas pressures in the repository to values below lithostatic, and assumed (and unverified) relationships between porosity, permeability, and pore pressure were employed. Parameter-sensitivity studies performed using the simplified models identified important parameters for which site-specific data were needed. Unrealistic modeling results, such as room pressures substantially above lithostatic, showed the need to include additional processes in the models. Field and laboratory experimental programs have been initiated in conjunction with continued model development to provide information on important processes and parameters.

Beauheim, R.L.; Howarth, S.M.; Vaughn, P.; Webb, S.W.; Larson, K.W.

1995-01-01T23:59:59.000Z

159

Energy Level Diagrams A=17  

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

Document Format): 17N (107 KB) 17O (141 KB) 17F (147 KB) Isobar diagram (90 KB) EPS (Encapsulated Postscript): 17N (107 KB) 17O (141 KB) 17F (147 KB) Isobar diagram (90...

160

A Simplified Solution For Gas Flow During a Blow-out in an H2 or Air Storage Cavern  

E-Print Network (OSTI)

and hydrogen storage in salt caverns. Compressed Air Energy Storage (CAES) is experiencing a rise in interest-form solutions of the blow-out problem. These solutions are applied to the cases of compressed air storageA Simplified Solution For Gas Flow During a Blow-out in an H2 or Air Storage Cavern Pierre Bérest

Boyer, Edmond

Note: This page contains sample records for the topic "gas flow diagram" 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

Laboratory measurements of gas flow along a pressurized grout/membrane/halite interface for the Waste Isolation Pilot Plant  

SciTech Connect

A series of laboratory gas-flow tests has been performed on interfaces comprised of concrete, very low-density polyethylene membrane, and halite. These tests were conducted to (1) evaluate whether a meaningful test can be run to quantify the effectiveness of a membrane, and (2) aid in the design of an Alcove Gas Barrier at the Waste Isolation Pilot Plant (WIPP), where membranes of this type are being considered for use at the interface between the concrete or grout of the gas barrier structure and the surrounding halite. Over 400 longitudinal transient-flow and steady-state radial-flow tests have been completed. However, it is not clear from these tests that the test results can be meaningfully applied to the full-scale Alcove Gas Barrier configuration because the measured permeabilities are several orders of magnitude higher than the meter-scale in situ concrete seal tests conducted at the WIPP as part of the Small-Scale Seal Performance Tests. Results show that the membranes decrease gas permeability along the concrete/halite interface by one to two orders of magnitude to below 10{sup {minus}15} m{sup 2} for the simplified test configurations. 28 refs., 11 figs., 16 tabs.

Ucpirti, H.; Daemen, J.J.K. [Univ. of Nevada, Reno, NV (United States); Finley, R.E.; George, J.T. [Sandia National Labs., Albuquerque, NM (United States)

1995-01-01T23:59:59.000Z

162

Final report for the ASC gas-powder two-phase flow modeling project AD2006-09.  

SciTech Connect

This report documents activities performed in FY2006 under the ''Gas-Powder Two-Phase Flow Modeling Project'', ASC project AD2006-09. Sandia has a need to understand phenomena related to the transport of powders in systems. This report documents a modeling strategy inspired by powder transport experiments conducted at Sandia in 2002. A baseline gas-powder two-phase flow model, developed under a companion PEM project and implemented into the Sierra code FUEGO, is presented and discussed here. This report also documents a number of computational tests that were conducted to evaluate the accuracy and robustness of the new model. Although considerable progress was made in implementing the complex two-phase flow model, this project has identified two important areas that need further attention. These include the need to compute robust compressible flow solutions for Mach numbers exceeding 0.35 and the need to improve conservation of mass for the powder phase. Recommendations for future work in the area of gas-powder two-phase flow are provided.

Evans, Gregory Herbert; Winters, William S.

2007-01-01T23:59:59.000Z

163

On web diagrams Jun Murakami  

E-Print Network (OSTI)

On web diagrams Jun Murakami Department of Mathematics, Graduate School of Science, Osaka­ tive invariant is defined in the space of web diagrams, and it includes the Casson­ Walker invariant of the mapping class groups. (cf. [9], [10]) 2. Web space 2.1. Web diagram. To explain the universal perturbative

164

Burden distribution control for maintaining the central gas flow at No. 1 blast furnace in Pohang Works  

SciTech Connect

The causes for temperature lowering at the upper shaft center in Pohang No. 1 blast furnace were investigated. The test operation with charging notch change in the actual blast furnace and with a 1/12 scale model to Pohang No. 1 blast furnace were carried out in order to improve central gas flow in the shaft. Finally, rebuilding of the lower bunker interior was performed using the results of model experiments. It was confirmed that the main reason for the gas temperature lowering at the upper shaft center was the smaller particle size at center than the wall according to the discharging characteristics of center feed bunker with stone box. The central gas flow could be secured through modifying the stone box in the bunker.

Jung, S.K.; Lee, Y.J.; Suh, Y.K.; Ahn, T.J.; Kim, S.M. [Pohang Iron and Steel Co. Ltd. (Korea, Republic of). Technical Research Labs.

1995-12-01T23:59:59.000Z

165

3 - Thermodynamics and Phase Diagrams  

Science Journals Connector (OSTI)

Abstract Many types of phase diagram sections involving temperature, composition, pressure, chemical potentials, partial pressures, volume and enthalpy as axis variables or constants are described for binary, ternary and multicomponent systems. The theme is the relationship between thermodynamics and phase diagrams. A review of the fundamentals of thermodynamics as required for the interpretation and calculation of phase diagrams is presented. One set of general geometrical rules which governs all types of single-valued phase diagram sections is derived. The computer calculation of phase diagrams from large critically assessed databases of model parameters is discussed.

Arthur D. Pelton

2014-01-01T23:59:59.000Z

166

Study of Flow Regimes in Multiply-Fractured Horizontal Wells in Tight Gas and Shale Gas Reservoir Systems  

E-Print Network (OSTI)

.3 Desorption parameters for the Billi coalbed methane reservoir correspond to within an acceptable range with those of the Barnett shale. For the initial reservoir pressure used in this study these values correspond to an initial methane storage of 344 scf... media has been studied extensively in coalbed methane reservoirs , where adsorption can be the primary mode of gas storage. Many analytic and semi-analytic models have been developed from the study of gas desorption from coalbed methane reservoirs...

Freeman, Craig M.

2010-07-14T23:59:59.000Z

167

A coupled model for ring dynamics, gas flow, and oil flow through the ring grooves in IC engines  

E-Print Network (OSTI)

Oil flows through ring/groove interface play a critical role in oil transport among different regions the piston ring pack of internal combustion engines. This thesis work is intended to improve the understanding and ...

Jia, Ke, S. M. Massachusetts Institute of Technology

2009-01-01T23:59:59.000Z

168

FEMO, A FLOW AND ENRICHMENT MONITOR FOR VERIFYING COMPLIANCE WITH INTERNATIONAL SAFEGUARDS REQUIREMENTS AT A GAS CENTRIFUGE ENRICHMENT FACILITY  

SciTech Connect

A number of countries have received construction licenses or are contemplating the construction of large-capacity gas centrifuge enrichment plants (GCEPs). The capability to independently verify nuclear material flows is a key component of international safeguards approaches, and the IAEA does not currently have an approved method to continuously monitor the mass flow of 235U in uranium hexafluoride (UF6) gas streams. Oak Ridge National Laboratory is investigating the development of a flow and enrichment monitor, or FEMO, based on an existing blend-down monitoring system (BDMS). The BDMS was designed to continuously monitor both 235U mass flow and enrichment of UF6 streams at the low pressures similar to those which exists at GCEPs. BDMSs have been installed at three sites-the first unit has operated successfully in an unattended environment for approximately 10 years. To be acceptable to GCEP operators, it is essential that the instrument be installed and maintained without interrupting operations. A means to continuously verify flow as is proposed by FEMO will likely be needed to monitor safeguards at large-capacity plants. This will enable the safeguards effectiveness that currently exists at smaller plants to be maintained at the larger facilities and also has the potential to reduce labor costs associated with inspections at current and future plants. This paper describes the FEMO design requirements, operating capabilities, and development work required before field demonstration.

Gunning, John E [ORNL; Laughter, Mark D [ORNL; March-Leuba, Jose A [ORNL

2008-01-01T23:59:59.000Z

169

Numerical simulation of the two-dimensional flow in high pressure catalytic combustor for gas turbine  

Science Journals Connector (OSTI)

The objective of this paper is modeling the mechanism of high pressure and high temperature catalytic oxidation of natural gas, or methane. The model is two-dimensional steady-state, and includes axial and radial convection and diffusion of mass, momentum and energy, as well as homogeneous (gas phase) and heterogeneous (gas surface) single step irreversible chemical reactions within a catalyst channel. Experimental investigations were also made of natural gas, or methane combustion in the presence of Mn-substituted hexaaluminate catalysts. Axial profiles of catalyst wall temperature, and gas temperature and gas composition for a range of gas turbine combustor operating conditions have been obtained for comparison with and development of a computer model of catalytic combustion. Numerical calculation results for atmospheric pressure agree well with experimental data. The calculations have been extended for high pressure (10 atm) operating conditions of gas turbine.

Y. Tsujikawa; S. Fujii; H. Sadamori; S. Ito; S. Katsura

1995-01-01T23:59:59.000Z

170

Mechanism model for shale gas transport considering diffusion, adsorption/desorption and Darcy flow  

Science Journals Connector (OSTI)

To improve the understanding of the transport mechanism in shale gas reservoirs and build a theoretical basic for ... on productivity evaluation and efficient exploitation, various gas transport mechanisms within...

Ming-qiang Wei ???; Yong-gang Duan ???

2013-07-01T23:59:59.000Z

171

Block Diagrams vs. Acausal Modeling  

Science Journals Connector (OSTI)

In this section, we will discuss, in detail, the differences between the block diagram and acausal approaches introduced in Section 1.3.

Michael Tiller Ph.D.

2001-01-01T23:59:59.000Z

172

Wellbore stability model for shale gas reservoir considering the coupling of multi-weakness planes and porous flow  

Science Journals Connector (OSTI)

Abstract Irregular wellbore collapse phenomena and accidents frequently occur during drilling operations in Longmaxi shale gas reservoir. Considering shale formation with natural cross beddings and fractures, we propose a multi-weakness plane instead of a single weakness plane failure model. Shale samples obtained from the Lower Silurian Longmaxi Strata of Sichuan Basin are investigated based on characterization and analysis of mineralogy, pore structure, sliding failure condition, and rock mechanics to study the impact of porous flow on jointed shale masses. Results show that Longmaxi gas shale is a brittle and fracture-prone material with poor hydrating capacity and extremely low permeability in rock matrices. Reduction of rock strength under porous flow may contribute to changes in intensity parameters of the weakness planes. Therefore, considering the failure of multi-weakness planes under porous flow, we present a wellbore stability model for shale gas reservoir. Two types of weakness plane distribution patterns are examined to discuss the effect of the occurrence, numbers, and water saturation of weakness planes. The results demonstrate that the number of weakness planes, difference in weakness plane occurrence, and diverse water saturation levels significantly affect wellbore stability during drilling.

Chuan Liang; Mian Chen; Yan Jin; Yunhu Lu

2014-01-01T23:59:59.000Z

173

Effect of flow velocity and temperature on ignition characteristics in laser ignition of natural gas and air mixtures  

Science Journals Connector (OSTI)

Abstract Laser induced spark ignition offers the potential for greater reliability and consistency in ignition of lean air/fuel mixtures. This increased reliability is essential for the application of gas turbines as primary or secondary reserve energy sources in smart grid systems, enabling the integration of renewable energy sources whose output is prone to fluctuation over time. This work details a study into the effect of flow velocity and temperature on minimum ignition energies in laser-induced spark ignition in an atmospheric combustion test rig, representative of a sub 15MW industrial gas turbine (Siemens Industrial Turbomachinery Ltd., Lincoln, UK). Determination of minimum ignition energies required for a range of temperatures and flow velocities is essential for establishing an operating window in which laser-induced spark ignition can operate under realistic, engine-like start conditions. Ignition of a natural gas and air mixture at atmospheric pressure was conducted using a laser ignition system utilizing a Q-switched Nd:YAG laser source operating at 532nm wavelength and 4ns pulse length. Analysis of the influence of flow velocity and temperature on ignition characteristics is presented in terms of required photon flux density, a useful parameter to consider during the development laser ignition systems.

J. Griffiths; M.J.W. Riley; A. Borman; C. Dowding; A. Kirk; R. Bickerton

2015-01-01T23:59:59.000Z

174

Fracture Modeling and Flow Behavior in Shale Gas Reservoirs Using Discrete Fracture Networks  

E-Print Network (OSTI)

Fluid flow process in fractured reservoirs is controlled primarily by the connectivity of fractures. The presence of fractures in these reservoirs significantly affects the mechanism of fluid flow. They have led to problems in the reservoir which...

Ogbechie, Joachim Nwabunwanne

2012-02-14T23:59:59.000Z

175

Energy Level Diagrams A=13  

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

(Portable Document Format): 13B (35 KB) 13C (63 KB) 13N (56 KB) Isobar diagram (56 KB) EPS (Encapsulated Postscript): 13B (1.5 MB) 13C (1.7 MB) 13N (1.4 MB) Isobar diagram (1.5...

176

Energy Level Diagrams A=4  

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

(Portable Document Format): 4H (26 KB) 4He (47 KB) 4Li (24 KB) Isobar diagram (36 KB) EPS (Encapsulated Postscript): 4H (1.32 MB) 4He (1.79 MB) 4Li (1.13 MB) Isobar diagram...

177

Energy Level Diagrams A=5  

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

(20 KB) PDF (Portable Document Format): 5He (40 KB) 5Li (40 KB) Isobar diagram (36 KB) EPS (Encapsulated Postscript): 5He (1.7 MB) 5Li (1.7 MB) Isobar diagram (1.6 MB) A5 Energy...

178

Energy Level Diagrams A=7  

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

(Portable Document Format): 7He (35 KB) 7Li (65 KB) 7Be (65 KB) Isobar Diagram (65 KB) EPS (Encapsulated Postscript): 7He (1.7 MB) 7Li (1.8 MB) 7Be (1.6 MB) Isobar Diagram (1.6...

179

Energy Level Diagrams A=19  

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

(Portable Document Format): 19O (34 KB) 19F (63 KB) 19Ne (35 KB) Isobar diagram (43 KB) EPS (Encapsulated Postscript): 19O (1.60 MB) 19F (1.82 MB) 19Ne (1.26 MB) Isobar diagram...

180

Energy Level Diagrams A=15  

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

(Portable Document Format): 15C (43 KB) 15N (69 KB) 15O (59 KB) Isobar diagram (58 KB) EPS (Encapsulated Postscript): 15C (1.82 MB) 15N (1.98 MB) 15O (1.67 MB) Isobar diagram...

Note: This page contains sample records for the topic "gas flow diagram" 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

Energy Level Diagrams A=6  

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

(Portable Document Format): 6He (65 KB) 6Li (65 KB) 6Be (33 KB) Isobar Diagram (65 KB) EPS (Encapsulated Postscript): 6He (1.5 MB) 6Li (1.5 MB) 6Be (1.3 MB) Isobar Diagram (1.7...

182

Perturbations to the Hubble diagram  

E-Print Network (OSTI)

We compute the linear responses of the Hubble diagram to small scalar perturbations in the Robertson-Walker metric and to small peculiar velocities of emitter and receiver. We discuss the monotonicity constraint of the Hubble diagram in the light of these responses.

Thomas Schucker; Ilhem ZouZou

2005-11-17T23:59:59.000Z

183

Influence of Atmospheric Pressure and Water Table Fluctuations on Gas Phase Flow and Transport of Volatile Organic Compounds (VOCs) in Unsaturated Zones  

E-Print Network (OSTI)

in previous studies. This dissertation systematically investigates their influence on the gas phase flow and transport of VOCs in soil and ground water remediation processes using analytically and numerically mathematical modeling. New semi...

You, Kehua

2013-04-19T23:59:59.000Z

184

Effect of explicit representation of detailed stratigraphy on brine and gas flow at the Waste Isolation Pilot Plant  

SciTech Connect

Stratigraphic units of the Salado Formation at the Waste Isolation Pilot Plant (WIPP) disposal room horizon includes various layers of halite, polyhalitic halite, argillaceous halite, clay, and anhydrite. Current models, including those used in the WIPP Performance Assessment calculations, employ a ``composite stratigraphy`` approach in modeling. This study was initiated to evaluate the impact that an explicit representation of detailed stratigraphy around the repository may have on fluid flow compared to the simplified ``composite stratigraphy`` models currently employed. Sensitivity of model results to intrinsic permeability anisotropy, interbed fracturing, two-phase characteristic curves, and gas-generation rates were studied. The results of this study indicate that explicit representation of the stratigraphy maintains higher pressures and does not allow as much fluid to leave the disposal room as compared to the ``composite stratigraphy`` approach. However, the differences are relatively small. Gas migration distances are also different between the two approaches. However, for the two cases in which explicit layering results were considerably different than the composite model (anisotropic and vapor-limited), the gas-migration distances for both models were negligible. For the cases in which gas migration distances were considerable, van Genuchten/Parker and interbed fracture, the differences between the two models were fairly insignificant. Overall, this study suggests that explicit representation of the stratigraphy in the WIPP PA models is not required for the parameter variations modeled if ``global quantities`` (e.g., disposal room pressures, net brine and gas flux into and out of disposal rooms) are the only concern.

Christian-Frear, T.L.; Webb, S.W. [Sandia National Labs., Albuquerque, NM (United States). Geohydrology Dept.

1996-04-01T23:59:59.000Z

185

STEADY STATE FLOW STUDIES OF SECTIONS IN NATURAL GAS PIPELINE NETWORKS.  

E-Print Network (OSTI)

??Efficient transportation of natural gas is vital to the success of the economy of the US and the world, because of the various uses of (more)

Ken-Worgu, Kenneth

2008-01-01T23:59:59.000Z

186

Injection, flow, and mixing of CO2 in porous media with residual gas.  

SciTech Connect

Geologic structures associated with depleted natural gas reservoirs are desirable targets for geologic carbon sequestration (GCS) as evidenced by numerous pilot and industrial-scale GCS projects in these environments world-wide. One feature of these GCS targets that may affect injection is the presence of residual CH{sub 4}. It is well known that CH{sub 4} drastically alters supercritical CO{sub 2} density and viscosity. Furthermore, residual gas of any kind affects the relative permeability of the liquid and gas phases, with relative permeability of the gas phase strongly dependent on the time-history of imbibition or drainage, i.e., dependent on hysteretic relative permeability. In this study, the effects of residual CH{sub 4} on supercritical CO{sub 2} injection were investigated by numerical simulation in an idealized one-dimensional system under three scenarios: (1) with no residual gas; (2) with residual supercritical CO{sub 2}; and (3) with residual CH{sub 4}. We further compare results of simulations that use non-hysteretic and hysteretic relative permeability functions. The primary effect of residual gas is to decrease injectivity by decreasing liquid-phase relative permeability. Secondary effects arise from injected gas effectively incorporating residual gas and thereby extending the mobile gas plume relative to cases with no residual gas. Third-order effects arise from gas mixing and associated compositional effects on density that effectively create a larger plume per unit mass. Non-hysteretic models of relative permeability can be used to approximate some parts of the behavior of the system, but fully hysteretic formulations are needed to accurately model the entire system.

Oldenburg, C.M.; Doughty, C.A.

2010-09-01T23:59:59.000Z

187

Estimation of exhaust gas aerodynamic force on the variable geometry turbocharger actuator: 1D flow model approach  

Science Journals Connector (OSTI)

Abstract This paper provides a reliable tool for simulating the effects of exhaust gas flow through the variable turbine geometry section of a variable geometry turbocharger (VGT), on flow control mechanism. The main objective is to estimate the resistive aerodynamic force exerted by the flow upon the variable geometry vanes and the controlling actuator, in order to improve the control of vane angles. To achieve this, a 1D model of the exhaust flow is developed using NavierStokes equations. As the flow characteristics depend upon the volute geometry, impeller blade force and the existing viscous friction, the related source terms (losses) are also included in the model. In order to guarantee stability, an implicit numerical solver has been developed for the resolution of the NavierStokes problem. The resulting simulation tool has been validated through comparison with experimentally obtained values of turbine inlet pressure and the aerodynamic force as measured at the actuator shaft. The simulator shows good compliance with experimental results.

Fayez Shakil Ahmed; Salah Laghrouche; Adeel Mehmood; Mohammed El Bagdouri

2014-01-01T23:59:59.000Z

188

Purged window apparatus. [On-line spectroscopic analysis of gas flow systems  

DOE Patents (OSTI)

A purged window apparatus is described which utilizes tangentially injected heated purge gases in the vicinity of electromagnetic radiation transmitting windows and a tapered external mounting tube to accelerate these gases to provide a vortex flow on the window surface and a turbulent flow throughout the mounting tube thereby preventing backstreaming of flowing gases under investigation in a chamber to which a plurality of similar purged apparatus is attached with the consequent result that spectroscopic analyses can be undertaken for lengthy periods without the necessity of interrupting the flow for cleaning or replacing the windows due to contamination.

Ballard, E.O.

1982-04-05T23:59:59.000Z

189

Low-density real gas flows about hypersonic vehicles. Interim report, 25 September 1986-25 September 1987  

SciTech Connect

Phase I results include selection of the three components of the computational of the computational algorithm (a Navier-Stokes solution algorithm, a chemistry solution algorithm, and vectorization and parallel-processing requirements for both algorithms). Development of a nonequilibrium air-chemistry reaction model is included, as well as studies of leeside models, turbulence models, and wall catalysis effects appropriate to the hypersonic flows to be considered. Mach 20 test cases were performed using the Navier-Stokes and chemistry algorithms, and a comprehensive sensitivity study was completed for the selection of an air-chemistry model. Transport property calculations are also discussed. The components of the computational algorithm developed during Phase I will be assembled during Phase II into a unified computer code capable of accurately and efficiently calculating low-density real gas flows about hypersonic vehicles.

Hoffman, J.J.; Wong, R.S.; Bussing, T.R.; Birch, S.F.

1988-03-01T23:59:59.000Z

190

Numerical modeling of the interaction between an electric arc and a gas flow  

Science Journals Connector (OSTI)

The interaction between an equilibrium arc discharge and a gas (air or argon) ... The dynamics and the special features of the electric arc formation are studied for both gases. In the air the electrically conduc...

E. N. Vasilev; D. A. Nesterov

2013-03-01T23:59:59.000Z

191

The development of a curb valve flow meter for gas theft detection  

E-Print Network (OSTI)

As the supply of natural gas continues to dwindle, and government decontrol of pricing progresses, the rising cost of this essential natural resource will drive more individuals to consider various forms of pilferage as a ...

Fitzgerald, Kevin Francis

1984-01-01T23:59:59.000Z

192

Stability of gas-bubble equilibrium shape in uniform flow of an ideal fluid  

Science Journals Connector (OSTI)

Steady-state motion of a bubble in the shape of an ellipsoid of ... this paper, possible equilibrium shapes of a bubble in the form of a triaxial ellipsoid ... at the stagnation point and within the gas bubble on...

A. G. Petrov

193

CFD study of mixing and segregation in CFB risers: Extension of EMMS drag model to binary gassolid flow  

Science Journals Connector (OSTI)

Abstract The Energy Minimization Multi-Scale (EMMS) drag model, using Sauter mean particle diameter to represent real particle size distribution, has proven to be effective in improving the accuracy of continuum modeling of gassolid flow. Nevertheless, mixing and segregation characteristics in circulating fluidized bed (CFB) risers are very important in many situations, which necessitates the explicit consideration of the effects of particle size distribution on the bed hydrodynamics. To this end, an attempt is made to extend the EMMS drag model to binary gassolid system, where four input parameters that can be obtained from computational fluid dynamics (CFD) simulation, including two slip velocities between gas and each particle phase and two particle concentrations of each phase, are used to solve the proposed EMMS drag model. Heterogeneous indexes, which are used to modify the drag correlation obtained from homogeneous fluidization, are then predicted and fed into multifluid model (MFM) to predict the dynamical behavior of mixing and segregation of binary gassolid flow in a CFB riser. The effects of different drag force models, kinetic theories and particleparticle drag force models are also systematically evaluated. It was shown that (i) MFM with the proposed EMMS drag model and the kinetic theory developed by Chao et al. (Chemical Engineering Science 2011, 66: 36053616) is able to correctly predict the mixing and segregation pattern in the studied riser, while MFM with homogenous drag forces and the simplified kinetic theory available in commercial software FLUENT completely fails; and (ii) with or without particleparticle drag force has a substantial influence upon the particle behavior.

Quan Zhou; Junwu Wang

2015-01-01T23:59:59.000Z

194

Modular High-Temperature Gas-Cooled Reactor short term thermal response to flow and reactivity transients  

SciTech Connect

The analyses reported here have been conducted at the Oak Ridge National Laboratory (ORNL) for the US Nuclear Regulatory Commission's (NRC's) Division of Regulatory Applications of the Office of Nuclear Regulatory Research. The short-term thermal response of the Modular High-Temperature Gas-Cooled Reactor (MHTGR) is analyzed for a range of flow and reactivity transients. These include loss of forced circulation (LOFC) without scram, moisture ingress, spurious withdrawal of a control rod group, hypothetical large and rapid positive reactivity insertion, and a rapid core cooling event. The coupled heat transfer-neutron kinetics model is also described.

Cleveland, J.C.

1988-01-01T23:59:59.000Z

195

Two dimensional flow of a compressible gas in a thin passage  

E-Print Network (OSTI)

with Experimental Results Nasa Flow Rates at 2 atm. Nasa Flow Rates at 3 atm. Temperature Profiles at 2 atm. Temperature Profiles at 3 atm. Pressure Profiles at U=+300 ft/sec. Pressure Profiles at U -300 ft/sec. Page 12 14 16 17 18 19 21 22 Various... Non-Isentropic -300 -200 -100 0 100 200 300 U ft/sec. FIGURE 4 MASS FLOW RATES AT 3 atm. 18 85o O T R 800 P ~ 2atm 1 T % 700' 1 U ft/sec. -300 T'R 750 700 -100 -10 650 +10 +300 600 10 Diatance x in 10 ft. -3 FIGURE 5 TEMPERATURE...

Desai, Anantkumar Ratanji

1971-01-01T23:59:59.000Z

196

Critical point analysis of phase envelope diagram  

SciTech Connect

Phase diagram or phase envelope is a relation between temperature and pressure that shows the condition of equilibria between the different phases of chemical compounds, mixture of compounds, and solutions. Phase diagram is an important issue in chemical thermodynamics and hydrocarbon reservoir. It is very useful for process simulation, hydrocarbon reactor design, and petroleum engineering studies. It is constructed from the bubble line, dew line, and critical point. Bubble line and dew line are composed of bubble points and dew points, respectively. Bubble point is the first point at which the gas is formed when a liquid is heated. Meanwhile, dew point is the first point where the liquid is formed when the gas is cooled. Critical point is the point where all of the properties of gases and liquids are equal, such as temperature, pressure, amount of substance, and others. Critical point is very useful in fuel processing and dissolution of certain chemicals. Here in this paper, we will show the critical point analytically. Then, it will be compared with numerical calculations of Peng-Robinson equation by using Newton-Raphson method. As case studies, several hydrocarbon mixtures are simulated using by Matlab.

Soetikno, Darmadi; Siagian, Ucok W. R. [Department of Petroleum Engineering, Institut Teknologi Bandung, Jl. Ganesha 10, Bandung 40132 (Indonesia); Kusdiantara, Rudy, E-mail: rkusdiantara@s.itb.ac.id; Puspita, Dila, E-mail: rkusdiantara@s.itb.ac.id; Sidarto, Kuntjoro A., E-mail: rkusdiantara@s.itb.ac.id; Soewono, Edy; Gunawan, Agus Y. [Department of Mathematics, Institut Teknologi Bandung, Jl. Ganesha 10, Bandung 40132 (Indonesia)

2014-03-24T23:59:59.000Z

197

Innovative Techniques of Multiphase Flow in Pipeline System for Oil?Gas Gathering and Transportation with Energy?Saving and Emission?Reduction  

Science Journals Connector (OSTI)

Multiphase flow measurement desanding dehumidification and heat furnace are critical techniques for the oil and gas gathering and transportation which influnce intensively the energy?saving and emission?reduction in the petroleum industry. Some innovative techniques were developed for the first time by the present research team including an online recognation instrument of multiphase flow regime a water fraction instrument for multuphase flow a coiled tube desanding separator with low pressure loss and high efficiency a supersonic swirling natural gas dehumifier and a vacuum phase?change boiler. With an integration of the above techniques a new oil gas gathering and transpotation system was proposed which reduced the establishment of one metering station and several transfer stations compared with the tranditional system. The oil and gas mixture transpotation in single pipes was realized. The improved techniques were applied in the oilfields in China and promoted the productivity of the oilfields by low energy consumption low emissions high efficiency and great security.

Bofeng Bai; Liejin Guo; Shaojun Zhang; Ximin Zhang; Hanyang Gu

2010-01-01T23:59:59.000Z

198

GTS Contracting System Context Diagram  

E-Print Network (OSTI)

GTS Contracting System Context Diagram Rejected P.O. and invalid letter Agency 0. Contracting;Agency GTS Contracting System "Level 0" Diagram P.O. 2.0 Review P.O. Contract info Valid PO: PO# outstanding flag Not Valid PO: Letter P.O. and invalid letter 1.0 Enter P.O. Contract/PO DB Contract #, P.O. 3

Schweik, Charles M.

199

Investigation of flow modifying tools for the continuous unloading of wet-gas wells  

E-Print Network (OSTI)

decreasing backpressure on wells and increasing production. This thesis evaluates this technology for use in the wellbore, where a tool is introduced at the bottom of the tubing string. Laboratory experiments were conducted using a 125-ft vertical flow...

Ali, Ahsan Jawaid

2012-06-07T23:59:59.000Z

200

Effects of non-Darcy flow on pressure buildup analysis of hydraulically fractured gas reservoirs  

E-Print Network (OSTI)

Conventional well-testing techniques are commonly used to evaluate pressure transient tests of hydraulically fractured wells to estimate values such as formation permeability, fracture length, and fracture conductivity. When non-Darcy flow occurs...

Alvarez Vera, Cesar

2012-06-07T23:59:59.000Z

Note: This page contains sample records for the topic "gas flow diagram" 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

Design and Experimental Study of the Steam Mining System for Natural Gas Hydrates  

Science Journals Connector (OSTI)

Figure 3. Schematic diagram of the SMSGH: (1) water tank, (2) water pump, (3) water treatment system, (4) soft water tank, (5) small pump, (6) electricity steam generator, (7) steam control valve, (8) orifice device, (9) dual-wall drill pipe, (10) non-productive layer bushing, (11) floral tube in the mined bed, (12) submersible pump, (13) air pump, (14) water tank, (15) gasliquid separator, (16) cartridge gas filter, (17) gas flow meter, (18) gas storage tank, and (19) ignition device. ... The working principle of the gas collection system is as follows: The obtained natural gas spills from the layer of earth through the floral tube in the mined bed (11) and will generate a high flow rate with the vapor and water mixture using the pump function of the air pump (13). ... Hydrates continuously generated natural gas. ...

You-hong Sun; Rui Jia; Wei Guo; Yong-qin Zhang; You-hai Zhu; Bing Li; Kuan Li

2012-11-06T23:59:59.000Z

202

Application of Crunch-Flow Routines to Constrain Present and Past Carbon Fluxes at Gas-Hydrate Bearing Sites  

SciTech Connect

In November 2012, Oregon State University initiated the project entitled: Application of Crunch-Flow routines to constrain present and past carbon fluxes at gas-hydrate bearing sites. Within this project we developed Crunch-Flow based modeling modules that include important biogeochemical processes that need to be considered in gas hydrate environments. Our modules were applied to quantify carbon cycling in present and past systems, using data collected during several DOE-supported drilling expeditions, which include the Cascadia margin in US, Ulleung Basin in South Korea, and several sites drilled offshore India on the Bay of Bengal and Andaman Sea. Specifically, we completed modeling efforts that: 1) Reproduce the compositional and isotopic profiles observed at the eight drilled sites in the Ulleung Basin that constrain and contrast the carbon cycling pathways at chimney (high methane flux) and non-chimney sites (low methane, advective systems); 2) Simulate the Ba record in the sediments to quantify the past dynamics of methane flux in the southern Hydrate Ridge, Cascadia margin; and 3) Provide quantitative estimates of the thickness of individual mass transport deposits (MTDs), time elapsed after the MTD event, rate of sulfate reduction in the MTD, and time required to reach a new steady state at several sites drilled in the Krishna-Godavari (K-G) Basin off India. In addition we developed a hybrid model scheme by coupling a home-made MATLAB code with CrunchFlow to address the methane transport and chloride enrichment at the Ulleung Basins chimney sites, and contributed the modeling component to a study focusing on pore-scale controls on gas hydrate distribution in sediments from the Andaman Sea. These efforts resulted in two manuscripts currently under review, and contributed the modeling component of another pare, also under review. Lessons learned from these efforts are the basis of a mini-workshop to be held at Oregon State University (Feb 2014) to instruct graduate students (OSU and UW) as well as DOE staff from the NETL lab in Albany on the use of Crunch Flow for geochemical applications.

Torres, Marta

2014-01-31T23:59:59.000Z

203

Stability of hypersonic reacting stagnation flow of a detonatable gas mixture by dynamical systems analysis  

SciTech Connect

The stability characteristics of the reacting hypersonic flow of the fuel/oxidizer mixture in the stagnation region of a blunt body are studied. The conditions for oscillations of the combustion front are assumed to be determined mainly by the flow conditions at the stagnation region. The density at the stagnation region is assumed to be constant at hypersonic flow conditions. By assuming a simplified flow model, the time dependent flow equations, including the heat addition due to the chemical reactions, are reduced to a second-order nonlinear differential equation for the instantaneous temperature. The solutions are analyzed assuming a one-step chemical reaction with zero-order and first-order processes using dynamical systems methods. These methods are used to determine the stability boundaries in terms of the flow and chemical reaction parameters. It is shown that the zero-order reaction has nonperiodic solutions that may lead to explosion whereas the first-order and higher-order reactions may have periodic solutions indicating oscillations. The zero-order analysis also reaffirms the requirements for a minimum size blunt body for the establishment of a detonation (in agreement with classical detonation theory) and the first-order analysis indicates a minimum body size for establishment of oscillations. The oscillation frequencies are calculated using the small perturbation approximation for the temperature oscillations. These frequencies are compared with results from published data on spheres and hemisphere cylindrical bodies fired into hydrogen-oxygen and acetylene oxygen mixtures. Very good agreement is found between the measured and calculated results.

Tivanov, G.; Rom, J. [Technion-Israel Inst. of Tech., Haifa (Israel)] [Technion-Israel Inst. of Tech., Haifa (Israel)

1995-12-01T23:59:59.000Z

204

Performance Analysis of an Annular Diffuser Under the Influence of a Gas Turbine Stage Exit Flow  

E-Print Network (OSTI)

stream entering the gap from the pressure side of the blade separates at the tip, due to the sharp corner, and contracts into a jet. Wear and tear of the sharp corners of the blade is inevitable with time, and as the tip corners get eroded the flow... displacements. Plus, over the engine life span the gap increases due to the metal wear and tear. One practiced method of mitigating the over the tip leakage flow is achieved by introducing a shroud to the rotor blade. In Figure 2.13, two high pressure...

Blanco, Rafael Rodriguez

2013-12-31T23:59:59.000Z

205

Surface chemistry of bulk nanocrystalline pure iron and electrochemistry study in gas-flow physiological saline  

E-Print Network (OSTI)

,9 was about an early failure owing to insufficient strength caused by hydrogen embrittlement or agingSurface chemistry of bulk nanocrystalline pure iron and electrochemistry study in gas. The contact angle test with water and glycerol droplets shows a smaller angle (though >90 ) of NC-Fe than

Zheng, Yufeng

206

Effects of the ship motion on gassolid flow and heat transfer in a circulating fluidized bed  

Science Journals Connector (OSTI)

A series of experiments on a circulating fluidized bed (CFB) was performed to investigate the effects of ship motion on gassolid flow and heat transfer in the CFB. Rolling period, rolling amplitude, inclination angle, superficial velocity, particle diameter range, and solid circulation flux were varied in the experiments. The following results were obtained: (1) When the CFB undergoes rolling motion, the downflow of particles changes periodically and the solid volume fraction increases at the riser bottom. As a result, the time-averaged total pressure drop of the CFB in rolling motion becomes larger than that at the upright attitude. Similarly, the total pressure drop of the CFB at an inclined attitude is larger than that at the upright attitude. (2) The total pressure drop of the CFB in rolling motion is hardly affected by rolling period. As rolling amplitude increases, on the other hand, the effects of rolling motion become more remarkable. From these results, it is concluded that gravity dominantly affects gassolid flow in the system. (3) At an inclined attitude, the symmetry of the flow field with respect to the riser center plane breaks, and heat transfer at the lower wall of the riser is promoted. As inclination angle increases, heat transfer augmentation becomes more remarkable. Similarly, the heat transfer coefficient in rolling motion is larger than that at the upright attitude. (4) Heat transfer augmentation by ship motion is concluded to be caused by the direct contact between solid particles and the heater surface owing to the vertical component of gravity to the surface.

Hiroyuki Murata; Hideyuki Oka; Masaki Adachi; Kazuyoshi Harumi

2012-01-01T23:59:59.000Z

207

Review of automated custody transfer equipment for large-volume gas flow measurement. Final report, August 1, 1987-February 28, 1988  

SciTech Connect

The influence of electronic automation on the accuracy of gas custody transfer measurements was investigated. The term Electronic Flow Measurement (EFM) denotes both electronic flow correctors (for positive displacement meters) and flow computers (for orifice plate measurements). Electronic devices have potential to be slightly more accurate than their mechanical counterparts. Electronic systems have the additional benefits of greater application flexibility, reduced flow corrector inventory, reduced maintenance and calibration requirements, and data storage and communication capability. The primary concerns with EFM equipment are compatibility between units made by different manufacturers and their ability to function under extreme environmental conditions.

Rush, W.F.; Tamosaitis, V.

1989-06-01T23:59:59.000Z

208

Detecting gas flares and estimating flaring volumes at individual flow stations using MODIS data  

Science Journals Connector (OSTI)

Abstract Gas flaring has gained global recognition as a prominent agent of pollution, leading to the establishment of the Global Gas Flaring Reduction (GGFR) initiative, which requires an objective means of monitoring flaring activity. Because auditable information on flaring activity is difficult to obtain there have recently been attempts to detect flares using satellite imagery, typically at global scales. However, to adequately assess the environmental and health impacts of flaring from local to regional scales, it is important that we have a means of acquiring information on the location of individual active flaring sites and the volume of gas combusted at these sites. In this study we developed an approach to the retrieval of such information using nighttime MODIS thermal imagery. The MODIS flare detection technique (MODET) and the MODIS flare volume estimation technique (MOVET) both exploit the absolute and contextual radiometric response of flare sites. The levels of detection accuracy and estimation error were quantified using independent observations of flare location and volume. The MODET and MOVET were applied to an archive of MODIS data spanning 20002014 covering the Niger Delta, Nigeria, a significant global hotspot of flaring activity. The results demonstrate the substantial spatial and temporal variability in gas flaring across the region, between states and between onshore and offshore sites. Thus, whilst the estimated total volume of gas flared in the region over the study period is large (350BillionCubicMetres), the heterogeneity in the flaring indicates that the impacts of such flares will be highly variable in space and time. In this context, the MODET and MOVET offer a consistent and objective means of monitoring flaring activity over an appropriate range of scales and it is now important that their robustness and transferability is tested in other oil-producing regions of the world.

Obinna C.D. Anejionu; G. Alan Blackburn; J. Duncan Whyatt

2015-01-01T23:59:59.000Z

209

Inferring temperature uniformity from gas composition measurements in a hydrogen combustion-heated hypersonic flow stream  

SciTech Connect

The application of a method for determining the temperature of an oxygen-replenished air stream heated to 2600 K by a hydrogen burner is reviewed and discussed. The purpose of the measurements is to determine the spatial uniformity of the temperature in the core flow of a ramjet test facility. The technique involves sampling the product gases at the exit of the test section nozzle to infer the makeup of the reactant gases entering the burner. Knowing also the temperature of the inlet gases and assuming the flow is at chemical equilibrium, the adiabatic flame temperature is determined using an industry accepted chemical equilibrium computer code. Local temperature depressions are estimated from heat loss calculations. A description of the method, hardware and procedures is presented, along with local heat loss estimates and uncertainty assessments. The uncertainty of the method is estimated at {+-}31 K, and the spatial uniformity was measured within {+-}35 K.

Olstad, S.J. [Phoenix Solutions Co., Minneapolis, MN (United States)

1995-08-01T23:59:59.000Z

210

Investigation of Swirl Flows Applied to the Oil and Gas Industry  

E-Print Network (OSTI)

................................................................................................... 24 3.7 Wear hot spots and settling of slurries ...................................................... 26 3.8 Visualization of erosion rate on pipe wall .................................................. 27 3.9 Pipe bends which... This is the principle used in many flow meters, for instance pitot tubes and venturi meters. This interdependence between static and dynamic pressure gains significant importance when dealing with swirling s The second term is unimportant relative to the two others...

Ravuri Venkata Krish, Meher Surendra

2010-01-16T23:59:59.000Z

211

DESIGN AND DEVELOPMENT OF GAS-LIQUID CYLINDRICAL CYCLONE COMPACT SEPARATORS FOR THREE-PHASE FLOW  

SciTech Connect

This report presents a brief overview of the activities and tasks accomplished during the second half year (April 1, 2001-September 30, 2001) of the fourth project year budget period (October 1, 2000-September 30, 2001). An executive summary is presented initially followed by the tasks of the current budget period. Then, detailed description of the experimental and modeling investigations are presented. Subsequently, the technical and scientific results of the activities of this project period are presented with some discussions. The findings of this investigation are summarized in the ''Conclusions'' section followed by relevant references. The fourth project year activities are divided into three main parts, which are carried out in parallel. The first part is continuation of the experimental program that includes a study of the oil/water two-phase behavior at high pressures and control system development for the three-phase GLCC{copyright}. This investigation will be eventually extended for three-phase flow. The second part consists of the development of a simplified mechanistic model incorporating the experimental results and behavior of dispersion of oil in water and water in oil. This will provide an insight into the hydrodynamic flow behavior and serve as the design tool for the industry. Although useful for sizing GLCC{copyright} for proven applications, the mechanistic model will not provide detailed hydrodynamic flow behavior information needed to screen new geometric variations or to study the effect of fluid property variations. Therefore, in the third part, the more rigorous approach of computational fluid dynamics (CFD) will be utilized. Multidimensional multiphase flow simulation at high pressures and for real crude conditions will provide much greater depth into the understanding of the physical phenomena and the mathematical analysis of three-phase GLCC{copyright} design and performance.

Dr. Ram S. Mohan; Dr. Ovadia Shoham

2001-10-30T23:59:59.000Z

212

DESIGN AND DEVELOPMENT OF GAS-LIQUID CYLINDRICAL CYCLONE COMPACT SEPARATORS FOR THREE-PHASE FLOW  

SciTech Connect

This report presents a brief overview of the activities and tasks accomplished during the first half year (October 1, 2000-March 31, 2001) of the fourth project year budget period (October 1, 2000-September 30, 2001). An executive summary is presented initially followed by the tasks of the current budget period. Then, detailed description of the experimental and modeling investigations are presented. Subsequently, the technical and scientific results of the activities of this project period are presented with some discussions. The findings of this investigation are summarized in the ''Conclusions'' section followed by relevant references. The fourth project year activities are divided into three main parts, which are carried out in parallel. The first part is continuation of the experimental program that includes a study of the oil/water two-phase behavior at high pressures and control system development for the three-phase GLCC{copyright}. This investigation will be eventually extended for three-phase flow. The second part consists of the development of a simplified mechanistic model incorporating the experimental results and behavior of dispersion of oil in water and water in oil. This will provide an insight into the hydrodynamic flow behavior and serve as the design tool for the industry. Although useful for sizing GLCC{copyright} for proven applications, the mechanistic model will not provide detailed hydrodynamic flow behavior information needed to screen new geometric variations or to study the effect of fluid property variations. Therefore, in the third part, the more rigorous approach of computational fluid dynamics (CFD) will be utilized. Multidimensional multiphase flow simulation at high pressures and for real crude conditions will provide much greater depth into the understanding of the physical phenomena and the mathematical analysis of three-phase GLCC{copyright} design and performance.

Dr. Ram S. Mohan; Dr. Ovadia Shoham

2001-04-30T23:59:59.000Z

213

UK Oil and Gas Collaborative Doctoral Training Centre (2014 start) Project Title: Coupled flow of water and gas during hydraulic fracture in shale (EARTH-15-CM1)  

E-Print Network (OSTI)

of water and gas during hydraulic fracture in shale (EARTH-15-CM1) Host institution: University of Oxford in extracting gas from these low-permeability rocks is hydraulic fracture. This involves injecting large of water and gas during hydraulic fracturing and subsequent gas recovery. This is essential in order

Henderson, Gideon

214

Hydrodynamic flow in lower Cretaceous Muddy sandstone, Gas Draw Field, Powder River Basin, Wyoming  

E-Print Network (OSTI)

/dx =[pj(p?- p )j (dh/dx), (4) where 8 is the angle of inclination, dz/dx is the slope of the oil- water interface, dh/dx is the horizontal component of head change, and pj(p - p ) is an amplification factor (Willis, 1961). Thus the w 0 hydrodynamic oil... reflected by Muddy thickness greater than 100 ft appears to cross the north end of Gas Draw, but 37 CHEVRON 1 FEDERAL PERMEABILITY (md) FEET 1000 100 10 I 0. 1 20 POROSITY &Im 20 10 0 WATER SATURATION 100 80 80 40 20 0 I I I I I I OIL SATURATION...

Lin, Joseph Tien-Chin

2012-06-07T23:59:59.000Z

215

Z diagrams of composite objects  

Science Journals Connector (OSTI)

We examine the effect of particle compositeness on the importance of Z diagrams, i.e., virtual particle-antiparticle states appearing in scattering processes. The examples of positronium in QED, and of the nucleon in the QCD-based quark model, are discussed in detail. Generally, if the composite particle consists of N constituents, its Z-diagram amplitude involves creation and annihilation of N constituent-anticonstituent pairs. This process (which we assume to be governed by Coulomb-type interactions with the fine structure constant ?) must take place in a small volume ?1/M3, where M is the particles mass; an additional suppression is due to the fact that the created system is electrically (or color) neutral. The composite particles Z-diagram amplitude is then suppressed, compared to that for an elementary particle, by at least a factor fZ?(q2/M2)[?2/(M3R3)]N-1, where q is the momentum transfer to the particle, and R the composite particles size. The decoupling of the composite Z diagrams at zero momentum transfer is consistent with low-energy theorems.

T. Jaroszewicz and Stanley J. Brodsky

1991-04-01T23:59:59.000Z

216

Energy Level Diagrams A=9  

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

Document Format): 9Li (36 KB) 9Be (60 KB) 9B (48 KB) 9C (28 KB) Isobar diagram (56 KB) EPS (Encapsulated Postscript): 9Li (1.7 MB) 9Be (1.7 MB) 9B (1.6 MB) 9C (1.7 MB) Isobar...

217

Energy Level Diagrams A=16  

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

Format): 16C (154 KB) 16N (71 KB) 16O (178 KB) 16F (108 KB) Isobar diagram (266 KB) EPS (Encapsulated Postscript): 16C (542 KB) 16N (430 KB) 16O (178 KB) 16F (357 KB) Isobar...

218

Energy Level Diagrams A=14  

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

Document Format): 14B (33 KB) 14C (50 KB) 14N (69 KB) 14O (40 KB) Isobar diagram (51 KB) EPS (Encapsulated Postscript): 14B (1.57 MB) 14C (1.72 MB) 14N (1.76 MB) 14O (1.75 MB)...

219

Energy Level Diagrams A=18  

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

Format): 18N (13 KB) 18O (56 KB) 18F (54 KB) 18Ne (36 KB) Isobar diagram (50 KB) EPS (Encapsulated Postscript): 18N (13 KB) 18O (1.98 MB) 18F (1.40 MB) 18Ne (1.64 MB)...

220

Energy Level Diagrams A=8  

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

Document Format): 8He (28 KB) 8Li (703 KB) 8Be (60 KB) 8B (32 KB) Isobar diagram (48 KB) EPS (Encapsulated Postscript): 8He (1.7 MB) 8Li (1.1 MB) 8Be (1.5 MB) 8B (1.4 MB) Isobar...

Note: This page contains sample records for the topic "gas flow diagram" 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

Energy Level Diagrams A=20  

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

Format): 20O (31 KB) 20F (40 KB) 20Ne (51 KB) 20Na (41 KB) Isobar diagram (47 KB) EPS (Encapsulated Postscript): 20O (1.44 MB) 20F (1.45 MB) 20Ne (1.38 MB) 20Na (1.75 MB)...

222

Energy Level Diagrams A=12  

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

Format): 12Be (30 KB) 12B (52 KB) 12C (72 KB) 12N (40 KB) Isobar diagram (57 KB) EPS (Encapsulated Postscript): 12Be (1.39 MB) 12B (1.80 MB) 12C (1.89 MB) 12N (1.66 MB)...

223

Energy Level Diagrams A=11  

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

11Li decay scheme (185 KB) 11B (287 KB) 11C (185 KB) 11N (28 KB) Isobar diagram (245 KB) EPS (Encapsulated Postscript): 11Li (1807 KB) 11Be (2213 KB) 11Li decay scheme (185 KB) 11B...

224

Energy Level Diagrams A=10  

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

(48 KB) 10B (56 KB) transitions for 10B (44 KB) 10C (28 KB) Isobar diagram (56 KB) EPS (Encapsulated Postscript): 10He (1.6 MB) 10Li (1.6 MB) 10Be (1.6 MB) 10B (1.7 MB) ...

225

Coupled multiphase flow and closure analysis of repository response to waste-generated gas at the Waste Isolation Pilot Plant (WIPP)  

SciTech Connect

A long-term assessment of the Waste Isolation Pilot Plant (WIPP) repository performance must consider the impact of gas generation resulting from the corrosion and microbial degradation of the emplaced waste. A multiphase fluid flow code, TOUGH2/EOS8, was adapted to model the processes of gas generation, disposal room creep closure, and multiphase (brine and gas) fluid flow, as well as the coupling between the three processes. System response to gas generation was simulated with a single, isolated disposal room surrounded by homogeneous halite containing two anhydrite interbeds, one above and one below the room. The interbeds were assumed to have flow connections to the room through high-permeability, excavation-induced fractures. System behavior was evaluated by tracking four performance measures: (1) peak room pressure; (2) maximum brine volume in the room; (3) total mass of gas expelled from the room; and (4) the maximum gas migration distance in an interbed. Baseline simulations used current best estimates of system parameters, selected through an evaluation of available data, to predict system response to gas generation under best-estimate conditions. Sensitivity simulations quantified the effects of parameter uncertainty by evaluating the change in the performance measures in response to parameter variations. In the sensitivity simulations, a single parameter value was varied to its minimum and maximum values, representative of the extreme expected values, with all other parameters held at best-estimate values. Sensitivity simulations identified the following parameters as important to gas expulsion and migration away from a disposal room: interbed porosity; interbed permeability; gas-generation potential; halite permeability; and interbed threshold pressure. Simulations also showed that the inclusion of interbed fracturing and a disturbed rock zone had a significant impact on system performance.

Freeze, G.A.; Larson, K.W. [INTERA Inc., Austin, TX (United States); Davies, P.B. [Sandia National Laboratories, Albuquerque, NM (United States)

1995-10-01T23:59:59.000Z

226

A new technique to analyze simultaneous sandface flow rate and pressure measurements of gas wells with turbulence and damage  

SciTech Connect

Most of the problems associated with conventional gas well test are related to the nonlinearity of the equations describing real gas flow, the presence of the rate dependent (non-Darcy) skin, and the long shut-in time periods required to collect the data for the analysis in tight reservoirs in which the wellbore storage period can be excessively long. This paper presents a new pressure buildup technique that reduces the wellbore storage effects, eliminates the long shut-in periods experienced with conventional tests by using afterflow rate and pressure data, and most importantly provides a direct method to estimate non-Darcy skin. The proposed technique uses normalized pseudofunctions to avoid the nonlinearities of the governing equations and involves using two different plots. The formation permeability is obtained from the slope of the first plot. The mechanical and non-Darcy skin factors are obtained respectively from the slope and intercept of the second plot. A field example and two simulated cases are presented to illustrate the application of the new technique.

Nashawi, I.S. [Kuwait Univ. (Kuwait); Al-Mehaideb, R.A.

1995-10-01T23:59:59.000Z

227

Integral manifolding structure for fuel cell core having parallel gas flow  

DOE Patents (OSTI)

Disclosed herein are manifolding means for directing the fuel and oxidant gases to parallel flow passageways in a fuel cell core. Each core passageway is defined by electrolyte and interconnect walls. Each electrolyte and interconnect wall consists respectively of anode and cathode materials layered on the opposite sides of electrolyte material, or on the opposite sides of interconnect material. A core wall projects beyond the open ends of the defined core passageways and is disposed approximately midway between and parallel to the adjacent overlaying and underlying interconnect walls to define manifold chambers therebetween on opposite sides of the wall. Each electrolyte wall defining the flow passageways is shaped to blend into and be connected to this wall in order to redirect the corresponding fuel and oxidant passageways to the respective manifold chambers either above or below this intermediate wall. Inlet and outlet connections are made to these separate manifold chambers respectively, for carrying the fuel and oxidant gases to the core, and for carrying their reaction products away from the core.

Herceg, Joseph E. (Naperville, IL)

1984-01-01T23:59:59.000Z

228

Integral manifolding structure for fuel cell core having parallel gas flow  

DOE Patents (OSTI)

Disclosed herein are manifolding means for directing the fuel and oxidant gases to parallel flow passageways in a fuel cell core. Each core passageway is defined by electrolyte and interconnect walls. Each electrolyte and interconnect wall consists respectively of anode and cathode materials layered on the opposite sides of electrolyte material, or on the opposite sides of interconnect material. A core wall projects beyond the open ends of the defined core passageways and is disposed approximately midway between and parallel to the adjacent overlaying and underlying interconnect walls to define manifold chambers therebetween on opposite sides of the wall. Each electrolyte wall defining the flow passageways is shaped to blend into and be connected to this wall in order to redirect the corresponding fuel and oxidant passageways to the respective manifold chambers either above or below this intermediate wall. Inlet and outlet connections are made to these separate manifold chambers respectively, for carrying the fuel and oxidant gases to the core, and for carrying their reaction products away from the core.

Herceg, J.E.

1983-10-12T23:59:59.000Z

229

A transient flow model of compressible gas mixtures in a nuclear fuel processing plant  

SciTech Connect

A model was developed to predict mixture concentration profiles in a subatmospheric mixture of hydrogen, nitrogen, and oxygen during valve-switching between a process line and an atmospheric vent line. The switching event allows air in-leakage to the system during the period in which the routing valves are open. Hydrogen and oxygen concentrations must be predicted to assess the potential for developing combustible mixtures in the system. The model consists of a one-dimensional finite-difference representation of the transient momentum and mass conservation equations, associated constitutive relationships and an equation-of-state for compressible gas. The resulting equation set was solved with Advanced Continuous Simulation Language (ACSL).

Farman, R.F.; Brown, R.A.

1989-02-16T23:59:59.000Z

230

A Fast Network Flow Model is used in conjunction with Measurements of Filter Permeability to calculate the Performance of Hot Gas Filters  

SciTech Connect

Two different technologies that are being considered for generating electric power on a large scale by burning coal are Pressurized Fluid Bed Combustion (PFBC) systems and Integrated Gasification and Combined Cycle (IGCC) systems. Particulate emission regulations that have been proposed for future systems may require that these systems be fitted with large scale Hot Gas Clean-Up (HGCU) filtration systems that would remove the fine particulate matter from the hot gas streams that are generated by PFBC and IGCC systems. These hot gas filtration systems are geometrically and aerodynamically complex. They typically are constructed with large arrays of ceramic candle filter elements (CFE). The successful design of these systems require an accurate assessment of the rate at which mechanical energy of the gas flow is dissipated as it passes through the filter containment vessel and the individual candle filter elements that make up the system. Because the filtration medium is typically made of a porous ceramic material having open pore sizes that are much smaller than the dimensions of the containment vessel, the filtration medium is usually considered to be a permeable medium that follows Darcy's law. The permeability constant that is measured in the lab is considered to be a function of the filtration medium only and is usually assumed to apply equally to all the filters in the vessel as if the flow were divided evenly among all the filter elements. In general, the flow of gas through each individual CFE will depend not only on the geometrical characteristics of the filtration medium, but also on the local mean flows in the filter containment vessel that a particular filter element sees. The flow inside the CFE core, through the system manifolds, and inside the containment vessel itself will be coupled to the flow in the filter medium by various Reynolds number effects. For any given filter containment vessel, since the mean flows are different in different locations inside the vessel, the flow of gas through an individual CFE will adjust itself to accommodate the local mean flows that prevail in its general location. In some locations this adjustment will take place at High Reynolds numbers and in other locations this will occur at low Reynolds numbers. The analysis done here investigates the nature of this coupling.

VanOsdol, J.G.; Chiang, T-K.

2002-09-19T23:59:59.000Z

231

Coupled flow and geomechanical analysis for gas production in the Prudhoe Bay Unit L-106 well Unit C gas hydrate deposit in Alaska  

E-Print Network (OSTI)

Hydrate deposits that are desirable gas production targets almost invari- ably involve coarse, unlithified, unconsolidated media (such as sands

Kim, J.

2014-01-01T23:59:59.000Z

232

A=4-20 Level Diagrams (EPS)  

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

EPS format The Image Map below will direct you to the most recent, updated Energy Level Diagram for that particular nuclide. To view previous Energy Level Diagrams from past...

233

Phase diagram Ag-Cu-Ge  

Science Journals Connector (OSTI)

This document is part of Subvolume A Nonequilibrium Phase Diagrams of Ternary Amorphous Alloys of Volume 37 Phase Diagrams and Physical Properties of Nonequilibrium Alloys of Landolt-Brnstein - Group III ...

Y. Kawazoe; T. Masumoto; K. Suzuki; A. Inoue

1997-01-01T23:59:59.000Z

234

Phase diagram Al-Ge-V  

Science Journals Connector (OSTI)

This document is part of Subvolume A Nonequilibrium Phase Diagrams of Ternary Amorphous Alloys of Volume 37 Phase Diagrams and Physical Properties of Nonequilibrium Alloys of Landolt-Brnstein - Group III ...

Y. Kawazoe; T. Masumoto; K. Suzuki; A. Inoue

1997-01-01T23:59:59.000Z

235

Phase diagram Au-Ge-Si  

Science Journals Connector (OSTI)

This document is part of Subvolume A Nonequilibrium Phase Diagrams of Ternary Amorphous Alloys of Volume 37 Phase Diagrams and Physical Properties of Nonequilibrium Alloys of Landolt-Brnstein - Group III ...

Y. Kawazoe; T. Masumoto; K. Suzuki; A. Inoue

1997-01-01T23:59:59.000Z

236

Phase diagram Al-Ge-Mn  

Science Journals Connector (OSTI)

This document is part of Subvolume A Nonequilibrium Phase Diagrams of Ternary Amorphous Alloys of Volume 37 Phase Diagrams and Physical Properties of Nonequilibrium Alloys of Landolt-Brnstein - Group III ...

Y. Kawazoe; T. Masumoto; K. Suzuki; A. Inoue

1997-01-01T23:59:59.000Z

237

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

E-Print Network (OSTI)

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

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

2014-01-01T23:59:59.000Z

238

LUNAR MASS SPECTROMETER RELIABILITY LOGIC DIAGRAM  

E-Print Network (OSTI)

point (A) to (F). The block diagram also defines the reliability functions for the purpose of FMEA 1

Rathbun, Julie A.

239

Microsoft Word - PMCDP Knowledge Diagram Updates March 26 2009...  

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

Knowledge Diagram Updates March 26 2009.doc Microsoft Word - PMCDP Knowledge Diagram Updates March 26 2009.doc Microsoft Word - PMCDP Knowledge Diagram Updates March 26 2009.doc...

240

Gas temperature profiles at different flow rates and heating rates suffice to estimate kinetic parameters for fluidised bed combustion  

SciTech Connect

Experimental work on estimation kinetic parameters for combustion was conducted in a bench-scale fluidised bed (FB: 105x200mm). Combustion medium was obtained by using an electrical heater immersed into the bed. The ratio of heating rate (kJ/s) to molar flow rate of air (mol/s) regulated by a rheostat so that the heat of combustion (kJ/mol) can be synthetically obtained by an electrical power supply for relevant O{sub 2}-feedstock concentration (C{sub 0}). O{sub 2}-restriction ratio ({beta}) was defined by the ratio of O{sub 2}-feedstock concentration to O{sub 2}-air concentration (C{sub O{sub 2}-AIR}) at prevailing heating rates. Compressed air at further atmospheric pressure ({approx_equal}102.7kPa) entered the bed that was alumina particles (250{mu}m). Experiments were carried out at different gas flow rates and heating rates. FB was operated with a single charge of (1300g) particles for obtaining the T/T{sub 0} curves, and than C/C{sub 0} curves. The mathematical relationships between temperature (T) and conversion ratio (X) were expressed by combining total energy balance and mass balance in FB. Observed surface reaction rate constants (k{sub S}) was obtained from the combined balances and proposed model was also tested for these kinetic parameters (frequency factor: k{sub 0}, activation energy: E{sub A}, and reaction order: n) obtained from air temperature measurements. It was found that the model curves allow a good description of the experimental data. Thus, reaction rate for combustion was sufficiently expressed. (author)

Suyadal, Y. [Faculty of Engineering, Department of Chemical Engineering, Ankara University, 06100-Tandogan, Ankara (Turkey)

2006-07-15T23:59:59.000Z

Note: This page contains sample records for the topic "gas flow diagram" 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

Two-current spin-dependent conduction in polycrystalline LaMnO{sub 3} produced under oxygen gas flow  

SciTech Connect

We have studied two-current spin-dependent conduction in polycrystalline LaMnO{sub 3} (LMO) produced under the oxygen gas flow (OGF). The polycrystalline La{sub 1?x}Sr{sub x}MnO{sub 3} (LSMO) samples were prepared with x = 0, 0.1, 0.125, 0.15, 0.175, 0.2 by use of a solid-state-reaction method. The LMO sample produced under the OGF showed large electrical conduction due to the self-hole-doping caused by the excess oxygen ions in it. The electrical resistivity and magnetoresistance (MR) of the LSMO samples were measured as a function of temperature (4K-300K). With increasing the temperature, we have observed that the MR ratios of the LSMO samples with x ? 0 have one maximum, while that of LMO sample has two maxima. The temperature at the maximum of the MR ratio corresponds to the magnetic phase transition temperature. The existence of two MR maxima for the LMO sample is considered to imply that the LMO sample has two regions with different doping levels; the one is the crystalline grain region with low doping and the other is the amorphous-like grain-boundary region with high doping.

Kobori, H.; Hoshino, A. [Department of Physics, Konan University, Kobe (Japan); Taniguchi, T. [Department of Physics, Osaka University, Osaka (Japan); Horie, T.; Naitoh, Y.; Shimizu, T. [National Institute of Advanced Industrial Science and Technology, Tsukuba (Japan)

2013-12-04T23:59:59.000Z

242

2:3 Twin Quasi-Periodic Oscillations in Magnetohydrodynamic Accretion Flows  

Science Journals Connector (OSTI)

......first display the overall evolution of MHD accretion flows in figure 1, in which the space-time diagrams of both the radial and vertical mass...Fig. 1 Space-time diagrams of MHD accretion flows. (a) Time evolution......

Yoshiaki Kato

2004-10-25T23:59:59.000Z

243

Coordinated optimization of the parameters of the cooled gas-turbine flow path and the parameters of gas-turbine cycles and combined-cycle power plants  

Science Journals Connector (OSTI)

In the present paper, we evaluate the effectiveness of the coordinated solution to the optimization problem for the parameters of cycles in gas turbine and combined cycle power plants and to the optimization prob...

A. M. Kler; Yu. B. Zakharov; Yu. M. Potanina

2014-06-01T23:59:59.000Z

244

Energy Level Diagrams A=4-20  

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

Graphic Interchange Format (GIF) Portable Document Format (PDF) Encapsulated Postscript (EPS) To view all of the Energy Level Diagrams available for each mass chain, including the...

245

In-line continuous sizing of biomass particles in gas-solid two-phase flow at a biomass-fired power plant  

Science Journals Connector (OSTI)

Gas-solid two-phase flows are widely seen in many industrial processes. A good exampleis the pneumatically conveyed pulverised fuel flow in the power generation industry. As a significant renewable fuel source biomass has been widely adopted in electrical power generation. The particle size distribution of pneumatically conveyed biomass correlates closely with combustion efficiency and pollutant emissions and should therefore be monitored on anin-line continuous basis. In this paper an integrated instrumentation system using both a piezoelectric sensorand anelectrostatic sensor arrayis proposed to measure the size distribution and flow velocity of biomass particles. A prototype system was tested on a 250mm bore pipe at a biomass-fired power plantand its performance has been evaluated under industrial conditions.

2014-01-01T23:59:59.000Z

246

Investigation of the Effect of Non-Darcy Flow and Multi-Phase Flow on the Productivity of Hydraulically Fractured Gas Wells  

E-Print Network (OSTI)

Hydraulic fracturing has recently been the completion of choice for most tight gas bearing formations. It has proven successful to produce these formations in a commercial manner. However, some considerations have to be taken into account to design...

Alarbi, Nasraldin Abdulslam A.

2011-10-21T23:59:59.000Z

247

Multi-scale approach to the modeling of fission gas discharge during hypothetical loss-of-flow accident in gen-IV sodium fast reactor  

SciTech Connect

The required technological and safety standards for future Gen IV Reactors can only be achieved if advanced simulation capabilities become available, which combine high performance computing with the necessary level of modeling detail and high accuracy of predictions. The purpose of this paper is to present new results of multi-scale three-dimensional (3D) simulations of the inter-related phenomena, which occur as a result of fuel element heat-up and cladding failure, including the injection of a jet of gaseous fission products into a partially blocked Sodium Fast Reactor (SFR) coolant channel, and gas/molten sodium transport along the coolant channels. The computational approach to the analysis of the overall accident scenario is based on using two different inter-communicating computational multiphase fluid dynamics (CMFD) codes: a CFD code, PHASTA, and a RANS code, NPHASE-CMFD. Using the geometry and time history of cladding failure and the gas injection rate, direct numerical simulations (DNS), combined with the Level Set method, of two-phase turbulent flow have been performed by the PHASTA code. The model allows one to track the evolution of gas/liquid interfaces at a centimeter scale. The simulated phenomena include the formation and breakup of the jet of fission products injected into the liquid sodium coolant. The PHASTA outflow has been averaged over time to obtain mean phasic velocities and volumetric concentrations, as well as the liquid turbulent kinetic energy and turbulence dissipation rate, all of which have served as the input to the core-scale simulations using the NPHASE-CMFD code. A sliding window time averaging has been used to capture mean flow parameters for transient cases. The results presented in the paper include testing and validation of the proposed models, as well the predictions of fission-gas/liquid-sodium transport along a multi-rod fuel assembly of SFR during a partial loss-of-flow accident. (authors)

Behafarid, F.; Shaver, D. R. [Rensselaer Polytechnic Inst., Troy, NY (United States); Bolotnov, I. A. [North Carolina State Univ., Raleigh, NC (United States); Jansen, K. E. [Univ. of Colorado, Boulder, CO (United States); Antal, S. P.; Podowski, M. Z. [Rensselaer Polytechnic Inst., Troy, NY (United States)

2012-07-01T23:59:59.000Z

248

Investigation of Water Droplet Interaction with the Sidewalls of the Gas Channel in a PEM Fuel Cell in the Presence of Gas Flow  

E-Print Network (OSTI)

forms of hydrogen powered technologies exist and have been well-researched, fuel cells is considered efficiently in the fuel cells (4). Inefficient water removal results in flooding of the catalyst layerInvestigation of Water Droplet Interaction with the Sidewalls of the Gas Channel in a PEM Fuel Cell

Kandlikar, Satish

249

Numerical simulations of the Macondo well blowout reveal strong control of oil flow by reservoir permeability and exsolution of gas  

E-Print Network (OSTI)

of natural gas in oil) STB Stock Tank Barrel ( one barrel oftank barrel (scf/STB). Gas solubility increases with pressure such that oilgas in oil is given by SGOR which has units of standard cubic feet per stock-tank

Oldenburg, C.M.

2013-01-01T23:59:59.000Z

250

Slug flow  

E-Print Network (OSTI)

Introduction: When two phases flow concurrently in a pipe, they can distribute themselves in a number of different configurations. The gas could be uniformly dispersed throughout the liquid in the form of small bubbles. ...

Griffith, P.

1959-01-01T23:59:59.000Z

251

Simultaneous solution algorithms for Eulerian-Eulerian gas-solid flow models: Stability analysis and convergence behaviour of a point and a plane solver  

SciTech Connect

Simultaneous solution algorithms for Eulerian-Eulerian gas-solid flow models are presented and their stability analyzed. The integration algorithms are based on dual-time stepping with fourth-order Runge-Kutta in pseudo-time. The domain is solved point or plane wise. The discretization of the inviscid terms is based on a low-Mach limit of the multi-phase preconditioned advection upstream splitting method (MP-AUSMP). The numerical stability of the simultaneous solution algorithms is analyzed in 2D with the Fourier method. Stability results are compared with the convergence behaviour of 3D riser simulations. The impact of the grid aspect ratio, preconditioning, artificial dissipation, and the treatment of the source terms is investigated. A particular advantage of the simultaneous solution algorithms is that they allow a fully implicit treatment of the source terms which are of crucial importance for the Eulerian-Eulerian gas-solid flow models and their solution. The numerical stability of the optimal simultaneous solution algorithm is analyzed for different solids volume fractions and gas-solid slip velocities. Furthermore, the effect of the grid resolution on the convergence behaviour and the simulation results is investigated. Finally, simulations of the bottom zone of a pilot-scale riser with a side solids inlet are experimentally validated.

Wilde, Juray de [Laboratorium voor Petrochemische Techniek, Ghent University, Krijgslaan 281, Blok S5, B-9000 Ghent (Belgium) and Fluid Mechanics Laboratory, Department of Fluid, Heat and Combustion Mechanics, Ghent University, St.-Pietersnieuwstraat 41, B-9000 Ghent (Belgium)]. E-mail: Guray.Marin@UGent.be; Vierendeels, Jan [Fluid Mechanics Laboratory, Department of Fluid, Heat and Combustion Mechanics, Ghent University, St.-Pietersnieuwstraat 41, B-9000 Ghent (Belgium); Heynderickx, Geraldine J. [Laboratorium voor Petrochemische Techniek, Ghent University, Krijgslaan 281, Blok S5, B-9000 Ghent (Belgium); Marin, Guy B. [Laboratorium voor Petrochemische Techniek, Ghent University, Krijgslaan 281, Blok S5, B-9000 Ghent (Belgium)

2005-07-20T23:59:59.000Z

252

Experimental study of industrial gas turbine flames including quantification of pressure influence on flow field, fuel/air premixing and flame shape  

Science Journals Connector (OSTI)

Abstract A commercial swirl burner for industrial gas turbine combustors was equipped with an optically accessible combustion chamber and installed in a high-pressure test-rig. Several premixed natural gas/air flames at pressures between 3 and 6bar and thermal powers of up to 1MW were studied by using a variety of measurement techniques. These include particle image velocimetry (PIV) for the investigation of the flow field, one-dimensional laser Raman scattering for the determination of the joint probability density functions of major species concentrations, mixture fraction and temperature, planar laser induced fluorescence (PLIF) of OH for the visualization of the flame front, chemiluminescence measurements of OH* for determining the lift-off height and size of the flame and acoustic recordings. The results give insights into important flame properties like the flow field structure, the premixing quality and the turbulenceflame interaction as well as their dependency on operating parameters like pressure, inflow velocity and equivalence ratio. The 1D Raman measurements yielded information about the gradients and variation of the mixture fraction and the quality of the fuel/air mixing, as well as the reaction progress. The OH PLIF images showed that the flame was located between the inflow of fresh gas and the recirculated combustion products. The flame front structures varied significantly with Reynolds number from wrinkled flame fronts to fragmented and strongly corrugated flame fronts. All results are combined in one database that can be used for the validation of numerical simulations.

Ulrich Stopper; Wolfgang Meier; Rajesh Sadanandan; Michael Sthr; Manfred Aigner; Ghenadie Bulat

2013-01-01T23:59:59.000Z

253

Cryogenic heat exchanger with turbulent flows  

Science Journals Connector (OSTI)

An evaporator-type cryogenic heat exchanger is designed and built for introducing fluidsolid heat exchange phenomena to undergraduates in a practical and efficient way. The heat exchanger functions at liquid nitrogen temperature and enables cooling of N2and He gases from room temperatures. We present first the experimental results of various parameters which characterize the heat exchanger (efficiency, number of transfer units, heat exchange coefficient, etc) as a function of the mass flow rate of the gas to be cooled. An analysis of the NuRe diagram is also presented. All experiments were conducted with N2gas. The scope of this tool is readily extended to research purposes.

Jay Amrit; Christelle Douay; Francis Dubois; Grard Defresne

2012-01-01T23:59:59.000Z

254

Onset and Subsequent Transient Phenomena of Liquid Loading in Gas Wells: Experimental Investigation Using a Large Scale Flow Loop  

E-Print Network (OSTI)

was carried out to study the onset of liquid loading and the subsequent transient phenomena, using a large scale flow loop to visualize two-phase flow regimes, and to measure pressure and liquid holdup along a 42-m long vertical tube. From this investigation...

Waltrich, Paulo

2012-10-19T23:59:59.000Z

255

Proceedings of the XI International Symposium on Gas Flow and Chemical Lasers and High Power Laser Conference, Edinburgh, UK 25-30 August 1996, SPIE Vol. 3092, ed. H.J. Baker, pp. 758-763 (1997).  

E-Print Network (OSTI)

Proceedings of the XI International Symposium on Gas Flow and Chemical Lasers and High Power Laser of 20 mm were obtained in aluminum and 41 mm in carbon steel using an N2 gas assist and 5-6 kW of power study of cutting thick aluminum and steel with a chemical oxygen-iodine laser using an N2 or O2 gas

Carroll, David L.

256

Non-Planar On-Shell Diagrams  

E-Print Network (OSTI)

We initiate a systematic study of non-planar on-shell diagrams in N=4 SYM and develop powerful technology for doing so. We introduce canonical variables generalizing face variables, which make the dlog form of the on-shell form explicit. We present a general classification of arbitrary on-shell diagrams in terms of two classes of combinatorial objects: generalized matching and matroid polytopes. We propose a boundary measurement that connects general on-shell diagrams to the Grassmannian. Our proposal exhibits two important and non-trivial properties: positivity in the planar case and its generalization for non-planar diagrams, and it matches the combinatorial description of the diagrams in terms of matroid polytopes. We present a comprehensive discussion of equivalence and reductions for non-planar diagrams and explain how they are captured by the generalized matching and matroid polytopes. Interestingly, non-planar diagrams exhibit novel phenomena, such as the emergence of constraints on Pl\\"ucker coordinat...

Franco, Sebastian; Penante, Brenda; Wen, Congkao

2015-01-01T23:59:59.000Z

257

Fundamentals of Natural Gas and Species Flows from Hydrate Dissociation-Applications to Safety and Sea Floor Instability  

SciTech Connect

Natural gas production from the dissociation of methane hydrate in a confined reservoir by a depressurizing down-hole well was studied. The case that the well pressure was kept constant was treated and two different linearization schemes in an axisymmetric configuration were used in the analysis. For different fixed well pressures and reservoir temperatures, approximate self-similar solutions were obtained. Distributions of temperature, pressure and gas velocity field across the reservoir were evaluated. The distance of the decomposition front from the well and the natural gas production rate as functions of time were also computed. Time evolutions of the resulting profiles were presented in graphical forms and their differences with the constant well output results were studied. It was shown that the gas production rate was a sensitive function of well pressure and reservoir temperature. The sensitivity of the results to the linearization scheme used was also studied.

Goodarz Ahmadi

2005-09-01T23:59:59.000Z

258

Preferential mode of gas invasion in sediments : grain-scale model of coupled multiphase fluid flow and sediment mechanics  

E-Print Network (OSTI)

We present a discrete element model for simulating, at the grain scale, gas migration in brine-saturated deformable media. We rigorously account for the presence of two fluids in the pore space by incorporating forces on ...

Jain, Antone Kumar

2009-01-01T23:59:59.000Z

259

FASTCHEM/trademark/ (Fly Ash and Flue Gas Desulfurization Sludge Transport and Geochemistry) package: Volume 2, User's guide to the EFLOW groundwater flow code  

SciTech Connect

This report documents a two-dimensional finite element code, EFLOW, developed to simulate water flow in fully or variably saturated porous media. This code is one component in the FASTCHEM/trademark/ (Fly Ash and Flue Gas Desulfurization Sludge Transport and Geochemistry) package. The formulation of the governing equations and the numerical procedures used in the code are presented. The flow equation is approximated using the Galerkin finite element method. For variably saturated flow problems, nonlinearities caused by unsaturated soil properties, atmospheric boundary conditions (e.g., infiltration, evaporation and seepage faces), and water uptake by plant roots are treated using Picard or Newton-Raphson methods. For fully saturated unconfined flow problems, the governing equations are formulated in an areal plane, and nonlinear water-table boundary conditions are treated using the Picard method. Several test problems are presented to verify the code and demonstrate its utility. These problems range from simple one-dimensional to complex two-dimensional and axisymmetric problems. 24 refs., 39 figs., 27 tabs.

Not Available

1988-09-01T23:59:59.000Z

260

MRI channel flows in vertically stratified models of accretion discs  

Science Journals Connector (OSTI)

......Numerical setup We used the MHD codes ramses (Teyssier 2002...eigenmodes. A space-time diagram of the density field rho for...2000). Figure 3 Space-time diagram of the gas density in a simulation...in Fig. 5, a space-time diagram for the density in the case......

Henrik N. Latter; Sebastien Fromang; Oliver Gressel

2010-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "gas flow diagram" 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

CFD Analysis of Core Bypass Flow and Crossflow in the Prismatic Very High Temperature Gas-cooled Nuclear Reactor  

E-Print Network (OSTI)

Very High Temperature Rector (VHTR) had been designated as one of those promising reactors for the Next Generation (IV) Nuclear Plant (NGNP). For a prismatic core VHTR, one of the most crucial design considerations is the bypass flow and crossflow...

Wang, Huhu 1985-

2012-12-13T23:59:59.000Z

262

Effects of geometry/dimensions of gas flow channels and operating conditions on high-temperature PEM fuel cells  

Science Journals Connector (OSTI)

In order to accomplish the objective of studying and optimizing the flow channel geometries and dimensions for high-temperature proton-exchange-membrane (PEM) fuel cells (with operating temperatures above 120C)...

Hong Liu; Peiwen Li; Alexandra Hartz

2014-11-01T23:59:59.000Z

263

Graphic update of automated logic diagrams  

Science Journals Connector (OSTI)

The Automated Logic Diagram, or ALD, is a well defined document prepared by engineers to specify the design of a machine. 1 The document is coded for computer input by highly trained transcription personnel. Changes or corrections ...

Richard J. Uhlik

1968-07-01T23:59:59.000Z

264

Impact of rapid granular flows through open channels  

E-Print Network (OSTI)

diagram: Solid: F=1 at nozzle (separation of supercritical and subcritical flow in contraction) Dashed, ...? Need your suggestions! Questions? #12;Movie: new experiments water through contraction; Akers & Bokhove

Al Hanbali, Ahmad

265

Simulation of the influence high-frequency (2 MHz) capacitive gas discharge and magnetic field on the plasma sheath near a surface in hypersonic gas flow  

SciTech Connect

The plasma sheath near the surface of a hypersonic aircraft formed under associative ionization behind the shock front shields the transmission and reception of radio signals. Using two-dimensional kinetic particle-in-cell simulations, we consider the change in plasma-sheath parameters near a flat surface in a hypersonic flow under the action of electrical and magnetic fields. The combined action of a high-frequency 2-MHz capacitive discharge, a constant voltage, and a magnetic field on the plasma sheath allows the local electron density to be reduced manyfold.

Schweigert, I. V., E-mail: ischweig@itam.nsc.ru [Russian Academy of Sciences, Khristianovich Institute of Theoretical and Applied Mechanics, Siberian Branch (Russian Federation)

2012-08-15T23:59:59.000Z

266

Active and Passive Remote Sensing Diagram | Open Energy Information  

Open Energy Info (EERE)

Diagram Jump to: navigation, search OpenEI Reference LibraryAdd to library Web Site: Active and Passive Remote Sensing Diagram Author National Aeronautics and Space Administration...

267

Net-proton measurements at RHIC and the QCD phase diagram  

E-Print Network (OSTI)

Two measurements related to the proton and anti-proton production near midrapidity in center of mass energies of 7.7, 11.5, 19.6, 27, 39, 62.4 and 200 GeV Au+Au collisions using the STAR detector at the Relativistic Heavy Ion Collider (RHIC) are discussed. At intermediate impact parameters the slope parameter of the directed flow versus rapidity (dv1/dy) for the net-protons shows a non-monotonic variation as a function of the beam energy. This non-monotonic variation is characterized by the presence of a minimum in dv1/dy between 11.5 and 19.6 GeV and a change in the sign of dv1/dy twice between 7.7 and 39 GeV. At small impact parameters the product of the moments of net-proton distribution, kurtosis x variance and skewness x standard deviation are observed to be significantly below the corresponding measurements at large impact parameter collisions for 19.6 and 27 GeV. The kurtosis x variance and skewness x standard deviation at these beam energies deviate from the expectations from Poisson statistics and that from a Hadron Resonance Gas model. Both these measurements have implications towards the understanding of the QCD phase structures, the first order phase transition and the critical point in the high baryonic chemical potential region of the phase diagram.

Bedangadas Mohanty

2014-02-16T23:59:59.000Z

268

Elbow mass flow meter  

DOE Patents (OSTI)

Elbow mass flow meter. The present invention includes a combination of an elbow pressure drop generator and a shunt-type mass flow sensor for providing an output which gives the mass flow rate of a gas that is nearly independent of the density of the gas. For air, the output is also approximately independent of humidity.

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

1994-01-01T23:59:59.000Z

269

Recirculating rotary gas compressor  

DOE Patents (OSTI)

A positive displacement, recirculating Roots-type rotary gas compressor is described which operates on the basis of flow work compression. The compressor includes a pair of large diameter recirculation conduits which return compressed discharge gas to the compressor housing, where it is mixed with low pressure inlet gas, thereby minimizing adiabatic heating of the gas. The compressor includes a pair of involutely lobed impellers and an associated port configuration which together result in uninterrupted flow of recirculation gas. The large diameter recirculation conduits equalize gas flow velocities within the compressor and minimize gas flow losses. The compressor is particularly suited to applications requiring sustained operation at higher gas compression ratios than have previously been feasible with rotary pumps, and is particularly applicable to refrigeration or other applications requiring condensation of a vapor. 12 figs.

Weinbrecht, J.F.

1992-02-25T23:59:59.000Z

270

Recirculating rotary gas compressor  

DOE Patents (OSTI)

A positive displacement, recirculating Roots-type rotary gas compressor which operates on the basis of flow work compression. The compressor includes a pair of large diameter recirculation conduits (24 and 26) which return compressed discharge gas to the compressor housing (14), where it is mixed with low pressure inlet gas, thereby minimizing adiabatic heating of the gas. The compressor includes a pair of involutely lobed impellers (10 and 12) and an associated port configuration which together result in uninterrupted flow of recirculation gas. The large diameter recirculation conduits equalize gas flow velocities within the compressor and minimize gas flow losses. The compressor is particularly suited to applications requiring sustained operation at higher gas compression ratios than have previously been feasible with rotary pumps, and is particularly applicable to refrigeration or other applications requiring condensation of a vapor.

Weinbrecht, John F. (601 Oakwood Loop, NE., Albuquerque, NM 87123)

1992-01-01T23:59:59.000Z

271

Development of a Multiscale Ionized Gas (MIG) Flow Code for Plasma Applications Subrata Roy Datta V. Gaitonde  

E-Print Network (OSTI)

Enterprises for developing high-power in-space electric propulsion systems; to the Air Force of Office, USA Air Force Research Laboratory sroy@kettering.edu Wright-Patterson AFB, Ohio 45433, USA Accurate of Scientific Research, Department of Defense, and DARPA for flow control and stability about an air vehicle

Roy, Subrata

272

Numerical Simulation of Flow and Heat Transfer in Internal Multi-Pass Cooling Channel within Gas Turbine Blade  

E-Print Network (OSTI)

four-pass channel with two different inlet settings. The main flowing channel was rectangular channel (AR=2:1) with hydraulic diameter (Dh ) equals to 2/3 inch (16.9 mm). The first and fourth channel were set as different aspect ratio (AR=2:1; AR=1...

Chu, Hung-Chieh 1979-

2012-11-16T23:59:59.000Z

273

Design of a high-pressure research flow loop for the experimental investigation of liquid loading in gas wells  

E-Print Network (OSTI)

2.5 (a) The optical acrylic and (b) inlet mixing section ................................... 16 2.6 (a) Slug catcher at the outlet of the test section and (b) gas/liquid (top) and oil/water separators... loops, the process is accompanied by the installation of major equipment and hardware that may include but is not limited to compressed air systems, water pumps, multiphase pumps and static vessels used as separators. Commercial and non...

Fernandez Alvarez, Juan Jose

2009-05-15T23:59:59.000Z

274

Experimental Investigation into a Pilot-Scale Entrained-Flow Gasification of Pulverized Coal Using CO2 As Carrier Gas  

Science Journals Connector (OSTI)

Regarding syngas composition in dry basis, there was a desired drop in inert gas (N2) concentration from about 6% to less than 2%, while the CO2 concentration increased by about 4%age points in optimal operation conditions when CO2 carrier substituted for N2. ... This technology has been validated and proven in many commercially operating units including 32 GE,(1) 15 Shell,(2) and 17 OMB (opposed multi burner) licenses. ...

Xiaolei Guo; Wenxue Lu; Zhenghua Dai; Haifeng Liu; Xin Gong; Lei Li; Honglin Zhang; Baogui Guo

2011-12-27T23:59:59.000Z

275

Two phase flow in capillary tubes  

E-Print Network (OSTI)

The flow of two phases, gas and liquid, has been studied in horizontal tubes of capillary diameter. The flow has been primarily studied in the regime where the gas flows as long bubbles separated from the wall of the tube ...

Suo, Mikio

1963-01-01T23:59:59.000Z

276

Computationally Useful Bridge Diagram Series. II. Diagrams in H-Bonds  

SciTech Connect

Equations for calculating accurate 4-point and 5-point bridge diagrams in terms of h-bonds have been presented and solved for various phase points of the Lennard-Jones fluid. A method of finding a self-consistent solution for the bridge function and the radial distribution function is demonstrated. The significance of this result over bridge diagrams expressed as f-bonds, in terms of its applicability to charged and dipolar models is discussed. Two very simple phenomenological bridge diagram forms for the bridge function for this model are examined and found to give results almost as accurate and in some cases more accurate than previous forms in the literature. This work represents the first use of directly calculated 5-point bridge diagrams in terms of h-bonds, and the many extra orders of f-bond diagrams which they include, in an integral equation result.

Perkyns, John S.; Dyer, Kippi M.; Pettitt, Bernard M.

2002-06-01T23:59:59.000Z

277

Richard P. Feynman and the Feynman Diagrams  

Office of Scientific and Technical Information (OSTI)

Richard P. Feynman and the Feynman Diagrams Richard P. Feynman and the Feynman Diagrams Feynman Honored · Resources with Additional Information Richard P. Feynman Courtesy AIP Emilio Segrè Visual Archives, Weber Collection 'Feynman remade quantum electrodynamics-the theory of the interaction between light and matter-and thus altered the way science understands the nature of waves and particles. He was co-awarded the Nobel Prize for Physics in 1965 for this work, which tied together in an experimentally perfect package all the varied phenomena at work in light, radio, electricity, and magnetism. ... The problem-solving tools that he invented-including pictorial representations of particle interactions known as Feynman diagrams-permeated many areas of theoretical physics in the second half of the 20th century.'

278

Muffler Theory Considering Flow  

Science Journals Connector (OSTI)

The effect of a steady subsonic flow component upon the acoustical properties of pipes and of laminar and turbulent flow resistances is accounted for in an elementary fashion. The effect of the alternating or acoustic component upon the steady?flow properties is treated likewise. Acoustic transmission loss referred to the end radiation from a pipe is related to back pressure (increase in steady pressure due to the muffler). Equivalent circuits and diagrams of transmission loss vs back pressure are presented for some simple arrangements of pipes volumes irises and flow resistances.

Ewald Eichler

1962-01-01T23:59:59.000Z

279

Instability regions in the upper HR diagram  

Science Journals Connector (OSTI)

......Champagne 1995) are indicative of nuclear fusion products. The same applies...For the computations, the input parameters of the models are...developed to obtain M/Mo for input L/Lo and T eff values...part of the HR diagram. Since input data are needed for a consistent......

Cornelis de Jager; Alex Lobel; Hans Nieuwenhuijzen; Richard Stothers

2001-10-21T23:59:59.000Z

280

NSTX Synchronization System Block Diagram Control Room  

E-Print Network (OSTI)

NSTX Synchronization System Block Diagram Clock Rack Control Room Junction Area MG FCPCRF Cage Test Cell West Patch Rack Test Cell East Patch Rack Darm Patch Rack CAMAC Crate CAMAC Crate CAMAC Crate' Level, and RF Balcony O 1,230 ft. 1.88 µsec Optic Rack 100 Control Room E 100 ft. .15µsec O 525 ft. .8

Princeton Plasma Physics Laboratory

Note: This page contains sample records for the topic "gas flow diagram" 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

Drawing conformal diagrams for a fractal landscape  

E-Print Network (OSTI)

Generic models of cosmological inflation and the recently proposed scenarios of a recycling universe and the string theory landscape predict spacetimes whose global geometry is a stochastic, self-similar fractal. To visualize the complicated causal structure of such a universe, one usually draws a conformal (Carter-Penrose) diagram. I develop a new method for drawing conformal diagrams, applicable to arbitrary 1+1-dimensional spacetimes. This method is based on a qualitative analysis of intersecting lightrays and thus avoids the need for explicit transformations of the spacetime metric. To demonstrate the power and simplicity of this method, I present derivations of diagrams for spacetimes of varying complication. I then apply the lightray method to three different models of an eternally inflating universe (scalar-field inflation, recycling universe, and string theory landscape) involving the nucleation of nested asymptotically flat, de Sitter and/or anti-de Sitter bubbles. I show that the resulting diagrams contain a characteristic fractal arrangement of lines.

Sergei Winitzki

2005-03-14T23:59:59.000Z

282

Enhanced membrane gas separations  

SciTech Connect

An improved membrane gas separation process is described comprising: (a) passing a feed gas stream to the non-permeate side of a membrane system adapted for the passage of purge gas on the permeate side thereof, and for the passage of the feed gas stream in a counter current flow pattern relative to the flow of purge gas on the permeate side thereof, said membrane system being capable of selectively permeating a fast permeating component from said feed gas, at a feed gas pressure at or above atmospheric pressure; (b) passing purge gas to the permeate side of the membrane system in counter current flow to the flow of said feed gas stream in order to facilitate carrying away of said fast permeating component from the surface of the membrane and maintaining the driving force for removal of the fast permeating component through the membrane from the feed gas stream, said permeate side of the membrane being maintained at a subatmospheric pressure within the range of from about 0.1 to about 5 psia by vacuum pump means; (c) recovering a product gas stream from the non-permeate side of the membrane; and (d) discharging purge gas and the fast permeating component that has permeated the membrane from the permeate side of the membrane, whereby the vacuum conditions maintained on the permeate side of the membrane by said vacuum pump means enhance the efficiency of the gas separation operation, thereby reducing the overall energy requirements thereof.

Prasad, R.

1993-07-13T23:59:59.000Z

283

Corrosion Behavior of AISI 316L Stainless Steel and ODS FeAl Aluminide in Eutectic Li2CO3K2CO3 Molten Carbonates under Flowing CO2O2 Gas Mixtures  

Science Journals Connector (OSTI)

A kinetics study on AISI 316L stainless steel and ODS(Oxide-Dispersion-Strenghtened) FeAl iron aluminide was conducted concerningits corrosion behavior in moltenLi2CO3-K2CO3 eutectic at 650C in flowingCO2-O2 gas...

S. Frangini

2000-02-01T23:59:59.000Z

284

A general neural and fuzzy-neural algorithm for natural gas flow prediction in city gate stations  

Science Journals Connector (OSTI)

Abstract This paper presents an approach to predict the transmission of natural gas (NG) in city gate stations (CGSs) by neural and fuzzy neural networks. The proposed approach constructs a model that is based on a primary station data and uses it to predict the NG transmission of a secondary station. Two stations in Qazvin, Iran, are selected as case study for daily prediction. The artificial neural network (ANN) and adaptive neuro-fuzzy inference system (ANFIS) are optimized for minimum error. Results show that ANFIS is more accurate than ANN and its mean absolute percentage error (MAPE) in primary station (Qazvin no. 2 CGS) is 5.57%. Furthermore, the ANFIS prediction model is used after adaptations for the secondary station (Takestan CGS). The range of NG transmitted volume is different in the secondary station but the results show that the MAPE of prediction in Takestan station is 5.73% which is of the same order as that of the primary station. The effect of errors in the adaptation step for secondary station is investigated. This approach is useful for prediction of transmitted NG in stations with insufficient data but similar consumption and saves the cost of the construction of new prediction model for each station.

Amin Aramesh; Nader Montazerin; Abbas Ahmadi

2014-01-01T23:59:59.000Z

285

Theoretical and numerical study of the phase diagram of patchy colloids: ordered and disordered patch arrangements  

E-Print Network (OSTI)

We report theoretical and numerical evaluations of the phase diagram for a model of patchy particles. Specifically we study hard-spheres whose surface is decorated by a small number f of identical sites ("sticky spots'') interacting via a short-range square-well attraction. We theoretically evaluate, solving the Wertheim theory, the location of the critical point and the gas-liquid coexistence line for several values of f and compare them to results of Gibbs and Grand Canonical Monte Carlo simulations. We study both ordered and disordered arrangements of the sites on the hard-sphere surface and confirm that patchiness has a strong effect on the phase diagram: the gas-liquid coexistence region in the temperature-density plane is significantly reduced as f decreases. We also theoretically evaluate the locus of specific heat maxima and the percolation line.

Emanuela Bianchi; Piero Tartaglia; Emanuela Zaccarelli; Francesco Sciortino

2008-02-18T23:59:59.000Z

286

Simple thermodynamic diagrams for real refrigeration systems  

Science Journals Connector (OSTI)

The thermodynamic performance of real irreversible cooling and refrigeration systems (chillers) can be summarized in simple rectangular temperature-entropy diagrams in analogy to classic pedagogical examples for idealized reversible devices. The key to translating complex dissipative losses into this graphical framework is the process average temperaturea factor that can be calculated from nonintrusive experimental measurements for converting entropy production into lost work. An uncomplicated thermodynamic model is used to transform the governing chiller performance equations into an easily-interpreted graph. Examples based upon actual data from commercial work-driven (reciprocating) and heat-driven (absorption) chillers are presented and are used to highlight the predominance of internal dissipation in determining chiller efficiency. With the thermodynamic diagram representation the relative roles of each irreversibility source as well as the reversible and endoreversible limits become transparent.

J. M. Gordon; K. C. Ng; H. T. Chua

1999-01-01T23:59:59.000Z

287

Wave diagrams for MHD modes in a magnetically structured atmosphere  

Science Journals Connector (OSTI)

Phase-speed diagrams, showing the allowable spectrum of surface and body waves in a magnetically structured atmosphere, are constructed for the interface and the slab. The diagrams (illustrated for photospheri...

I. C. Rae; B. Roberts

1983-04-01T23:59:59.000Z

288

Static gas expansion cooler  

DOE Patents (OSTI)

Disclosed is a cooler for television cameras and other temperature sensitive equipment. The cooler uses compressed gas ehich is accelerated to a high velocity by passing it through flow passageways having nozzle portions which expand the gas. This acceleration and expansion causes the gas to undergo a decrease in temperature thereby cooling the cooler body and adjacent temperature sensitive equipment.

Guzek, J.C.; Lujan, R.A.

1984-01-01T23:59:59.000Z

289

Worldline Green Functions for Arbitrary Feynman Diagrams  

E-Print Network (OSTI)

We propose a general method to obtain the scalar worldline Green function on an arbitrary 1D topological space, with which the first-quantized method of evaluating 1-loop Feynman diagrams can be generalized to calculate arbitrary ones. The electric analog of the worldline Green function problem is found and a compact expression for the worldline Green function is given, which has similar structure to the 2D bosonic Green function of the closed bosonic string.

Peng Dai; Warren Siegel

2006-08-09T23:59:59.000Z

290

From Hubble diagrams to scale factors  

E-Print Network (OSTI)

We present a lower bound on the radius of the universe today $a_0$ and a monotonicity constraint on the Hubble diagram. Our theoretical input is Einstein's kinematics and maximally symmetric universes. Present supernova data yield $a_0 > 1.2\\cdot 10^{26}$ m. A first attempt to quantify the monotonicity constraint is described. We do not see any indication of non-monotonicity.

Thomas Schucker; Andre Tilquin

2005-06-20T23:59:59.000Z

291

Elbow mass flow meter  

DOE Patents (OSTI)

The present invention includes a combination of an elbow pressure drop generator and a shunt-type mass flow sensor for providing an output which gives the mass flow rate of a gas that is nearly independent of the density of the gas. For air, the output is also approximately independent of humidity. 3 figs.

McFarland, A.R.; Rodgers, J.C.; Ortiz, C.A.; Nelson, D.C.

1994-08-16T23:59:59.000Z

292

Brine and Gas Flow Patterns Between Excavated Areas and Disturbed Rock Zone in the 1996 Performance Assessment for the Waste Isolation Pilot Plant for a Single Drilling Intrusion that Penetrates Repository and Castile Brine Reservoir  

SciTech Connect

The Waste Isolation Pilot Plant (WIPP), which is located in southeastern New Mexico, is being developed for the geologic disposal of transuranic (TRU) waste by the U.S. Department of Energy (DOE). Waste disposal will take place in panels excavated in a bedded salt formation approximately 2000 ft (610 m) below the land surface. The BRAGFLO computer program which solves a system of nonlinear partial differential equations for two-phase flow, was used to investigate brine and gas flow patterns in the vicinity of the repository for the 1996 WIPP performance assessment (PA). The present study examines the implications of modeling assumptions used in conjunction with BRAGFLO in the 1996 WIPP PA that affect brine and gas flow patterns involving two waste regions in the repository (i.e., a single waste panel and the remaining nine waste panels), a disturbed rock zone (DRZ) that lies just above and below these two regions, and a borehole that penetrates the single waste panel and a brine pocket below this panel. The two waste regions are separated by a panel closure. The following insights were obtained from this study. First, the impediment to flow between the two waste regions provided by the panel closure model is reduced due to the permeable and areally extensive nature of the DRZ adopted in the 1996 WIPP PA, which results in the DRZ becoming an effective pathway for gas and brine movement around the panel closures and thus between the two waste regions. Brine and gas flow between the two waste regions via the DRZ causes pressures between the two to equilibrate rapidly, with the result that processes in the intruded waste panel are not isolated from the rest of the repository. Second, the connection between intruded and unintruded waste panels provided by the DRZ increases the time required for repository pressures to equilibrate with the overlying and/or underlying units subsequent to a drilling intrusion. Third, the large and areally extensive DRZ void volumes is a significant source of brine to the repository, which is consumed in the corrosion of iron and thus contributes to increased repository pressures. Fourth, the DRZ itself lowers repository pressures by providing storage for gas and access to additional gas storage in areas of the repository. Fifth, given the pathway that the DRZ provides for gas and brine to flow around the panel closures, isolation of the waste panels by the panel closures was not essential to compliance with the U.S. Environment Protection Agency's regulations in the 1996 WIPP PA.

ECONOMY,KATHLEEN M.; HELTON,JON CRAIG; VAUGHN,PALMER

1999-10-01T23:59:59.000Z

293

Density-Enthalpy Phase Diagram 0D Boiler Simulation  

E-Print Network (OSTI)

Density-Enthalpy Phase Diagram 0D Boiler Simulation Finite Element Method Further Research Finite Transitions #12;Density-Enthalpy Phase Diagram 0D Boiler Simulation Finite Element Method Further Research;Density-Enthalpy Phase Diagram 0D Boiler Simulation Finite Element Method Further Research Goal

Vuik, Kees

294

Gas imaging by infrared gas-correlation spectrometry  

Science Journals Connector (OSTI)

We describe a new method for visualization of gas flows based on infrared absorption and gas-correlation techniques. This result is a gray-scale or false color-coded image showing the...

Sandsten, Jonas; Edner, Hans; Svanberg, Sune

1996-01-01T23:59:59.000Z

295

Phase Diagram Approach to Evaporation from Emulsions with n Oil Compounds  

Science Journals Connector (OSTI)

Chemistry Department, Southeast Missouri State University, Cape Girardeau, Missouri 63701 ... We have used dynamic headspace analysis to investigate the evaporation rates of perfume oils from stirred oil-in-water emulsions into a flowing gas stream. ...

Stig E. Friberg

2009-02-09T23:59:59.000Z

296

Performance and Applications of an Ultrasonic Detector for Gas Chromatography  

Science Journals Connector (OSTI)

......corrosion resistant materials, and any gas compatible...hydrogen than to any other material. Chromatograms are...Figure 1. Plumbing diagram of apparatus. et al...temperatures. Signal handling in the cell is illustrated in the block diagram, Figure 3. A high......

H. W. Grice; D. J. David

1969-04-01T23:59:59.000Z

297

Influence assessment of landfill gas pumping  

Science Journals Connector (OSTI)

Changes in CH4 gas concentrations arising in a landfill as a consequence of a number of gas extraction pumping rates, are characterized. The field-monitored results indicate a fairly free flow of gas through the ...

Edward A. McBean; Anthony J. Crutcher; Frank A. Rovers

1984-04-01T23:59:59.000Z

298

Sauget Plant Flare Gas Reduction Project  

E-Print Network (OSTI)

Empirical analysis of stack gas heating value allowed the Afton Chemical Corporation Sauget Plant to reduce natural gas flow to its process flares by about 50% while maintaining the EPA-required minimum heating value of the gas streams....

Ratkowski, D. P.

2007-01-01T23:59:59.000Z

299

Large eddy simulation applications in gas turbines  

Science Journals Connector (OSTI)

...exhaust plume development. The application...modelling in the gas turbine combustor...modelling strategies for the complex...flows in the gas turbine, as surveyed...of typical gas turbine parts necessitates...made in the development and application...

2009-01-01T23:59:59.000Z

300

Determination of Low Levels of Methanol in Crude Oils by Multi-dimensional Gas Chromatography (MDGC) Using Novel Micro Channel Flow Technology  

Science Journals Connector (OSTI)

......prevent the formation of gas hydrates in crude oil...wells are shut in or when production rates are slowed. Since...ionization (GC/FID) or gas chromatography/mass...Nitrogen is used-as the low cost carrier gas. Sample preparation and......

Andrew Tipler; Lee Marotta; Frank DiSanzo; Heidi Grecsek

2012-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "gas flow diagram" 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

Pion condensation in a dense neutrino gas  

E-Print Network (OSTI)

We argue that using an equilibrated gas of neutrinos it is possible to probe the phase diagram of QCD for finite isospin and small baryon chemical potentials. We discuss this region of the phase diagram in detail and demonstrate that for large enough neutrino densities a Bose-Einstein condensate of positively charged pions arises. Moreover, we show that for nonzero neutrino density the degeneracy in the lifetimes and masses of the charged pions is lifted.

Hiroaki Abuki; Tomas Brauner; Harmen J. Warringa

2009-08-26T23:59:59.000Z

302

Flow assurance and multiphase pumping  

E-Print Network (OSTI)

. LITERATURE REVIEW???????????????????????????????????.. 5 Deepwater Oilfields???????????????????????????????????.. 7 Flow Assurance?????????????????????????????????????.. 9 Hydrate Management??????????????????????????????????. 11 Stranded Gas...???????????????????????????????????????.. 172 Management in Oil and Gas???????????????????????????????. 172 Constraints and Recent Advances????????????????????????????. 173 Optimization for Oilfield Management??????????????????????????. 174 Asset Management...

Nikhar, Hemant G.

2009-05-15T23:59:59.000Z

303

Oscillations in dc driven barrier discharges: Numerical solutions, stability analysis, and phase diagram  

Science Journals Connector (OSTI)

A short gas-discharge layer sandwiched with a semiconductor layer between planar electrodes shows a variety of spatiotemporal patterns. We focus on the spontaneous temporal oscillations that occur while a dc voltage is applied and while the system stays spatially homogeneous; the results for these oscillations apply equally to a planar discharge in series with any resistor with capacitance. We define the minimal model, identify its independent dimensionless parameters, and then present the results of the full time-dependent numerical solutions of the model as well as of a linear stability analysis of the stationary state. Full numerical solutions and the results of the stability analysis agree very well. The stability analysis is then used for calculating bifurcation diagrams. We find semiquantitative agreement with experiment for the diagram of bifurcations from stationary to oscillating solutions as well as for amplitude and frequency of the developing limit cycle oscillations.

Danijela D. ija?i?, Ute Ebert, and Ismail Rafatov

2005-06-07T23:59:59.000Z

304

Study of gel materials as radioactive 222Rn gas detectors  

Science Journals Connector (OSTI)

......Commercial hair gel material (polyvinyl pyrolydone...radioactive gas in the gel material, and the subsequent...reproducibility of data, easy handling and low cost of the gel material. This detection...aerosols(7). The diagrams of the Marinelli......

G. Espinosa; J. I. Golzarri; J. Rickards; R. B. Gammage

2006-09-01T23:59:59.000Z

305

Probing the QCD phase diagram with fluctuations  

E-Print Network (OSTI)

The relevance of higher order cumulants of conserved charges for the analysis of freeze-out and critical conditions in heavy ion collisions at LHC and RHIC is discussed. Using properties of $O(4)$ scaling functions, the generic structure of these higher cumulants at vanishing baryon chemical potential is discussed. Chiral model calculations are then used to study their properties at non-zero baryon chemical potential. It is argued that the rapid variation of sixth and higher order cumulants at the phase boundary may be used to explore the QCD phase diagram in experiment. Moreover, results for the Polyakov loop susceptibilities in SU(3) lattice gauge theory as well as in (2+1) flavor lattice QCD are discussed. An analysis of the ratios of susceptibilities indicates that the deconfinement transition is reflected in characteristic modifications of these ratios.

Friman, Bengt

2014-01-01T23:59:59.000Z

306

State diagrams of linear sequential machines  

E-Print Network (OSTI)

, 0, X& can be defined as follows. The machine M has a two-character input alphabet I = (0, 1), a two-character output alphabet a = (0, 1), three internal states S = is , sl, s2), and next-state and output functions defined as 0 (s, l)~s o 0 (s1... if and only if c C U U U &x. &T(s)~r(s ). Thus x and x. are R-equivalent. l. c 1 An input sequence &xl. . . x & will be called a ~cele of length t if 1''' t there exists a state, s. , such that &XI x &s ~s. . To indicate that 1 1' t i i' the diagram has...

English, Linda Sue

2012-06-07T23:59:59.000Z

307

Phase diagram of half-doped manganites  

Science Journals Connector (OSTI)

The phase diagram of half-doped manganites which may consist of experimentally observed ferromagnetic (FM), A-,C-, and charge-exchange (CE)-type antiferromagnetic (AF) states is obtained in terms of a model which is based on double exchange via degenerate eg orbitals, the on-site Coulomb interaction (U), and the nearest-neighbor Coulomb interaction (V). We find that, because of the strong spatial anisotropy of the electron hoppings, the on-site Coulomb interaction has different effects on these magnetic order states. As a result, large values of U suppress the FM state and favor the A- and C-type AF states. Moreover, we show that it is the interplay between the on-site and nearest-neighbor Coulomb repulsions that stabilizes the CE phase and results in the charge ordering in the state.

Zhenghuang Shu; Jinming Dong; D. Y. Xing

2001-05-18T23:59:59.000Z

308

Global phase diagram for magnetism and lattice distortion of iron-pnictide materials  

Science Journals Connector (OSTI)

We study the global phase diagram of magnetic orders and lattice structure in the Fe-pnictide materials at zero temperature within one unified theory tuned by both electron doping and pressure. On the low doping and high-pressure side of the phase diagram, there is one single transition, which is described by a z=2 mean-field theory with very weak run-away flows; on the high doping and low-pressure side, the transition is expected to split to two transitions, with one O(3) spin-density wave transition followed by a z=3 quantum Ising transition at larger doping. The fluctuation of the strain field of the lattice will not affect the spin-density wave transition but will likely drive the Ising nematic order transition a mean-field transition through a linear coupling, as observed experimentally in BaFe2?xCoxAs2.

Yang Qi and Cenke Xu

2009-09-04T23:59:59.000Z

309

Oil and Gas CDT Gas hydrate distribution on tectonically active continental  

E-Print Network (OSTI)

Oil and Gas CDT Gas hydrate distribution on tectonically active continental margins: Impact on gas. Gregory F. Moore, University of Hawaii (USA) http://www.soest.hawaii.edu/moore/ Key Words Gas Hydrates, Faults, Fluid Flow, gas prospectivity Overview Fig. 1. Research on gas hydrates is often undertaken

Henderson, Gideon

310

Edinburgh Research Explorer Quantifying the implicit process flow abstraction in SBGN-PD  

E-Print Network (OSTI)

Edinburgh Research Explorer Quantifying the implicit process flow abstraction in SBGN-PD diagrams the implicit process flow abstraction in SBGN-PD diagrams with Bio-PEPA'. in Proceedings of COMPMOD 2009. ETPCS to publication record in Edinburgh Research Explorer Published In: Proceedings of COMPMOD 2009 General rights

Millar, Andrew J.

311

UML diagrams supporting domain specification inside the CRUTIAL project  

Science Journals Connector (OSTI)

The paper proposes the representation in form of UML Class Diagrams of the electric power system (EPS) intended to be composed by two kinds of interdependent infrastructures: the physical infrastructure for the production and the distribution of the ... Keywords: CRUTIAL, UML, class diagrams, critical scenario, electric power system, modelling

Davide Cerotti; Daniele Codetta-Raiteri; Susanna Donatelli; Claudio Brasca; Giovanna Dondossola; Fabrizio Garrone

2007-10-01T23:59:59.000Z

312

Dispersion diagrams of chromospheric MHD waves in a 2D  

E-Print Network (OSTI)

Dispersion diagrams of chromospheric MHD waves in a 2D simulation Chris Dove The Evergreen State MHD code models dynamics · Methods to get clearer pictures · Analysis of results · Patterns/NCAR, Thursday 29 July 2004 A diagram of the Sun, courtesy NASA sohowww

Zita, E.J.

313

RESOLUTIONS AND BETTI DIAGRAMS OF ALGEBRAS OF SL2-INVARIANTS  

E-Print Network (OSTI)

RESOLUTIONS AND BETTI DIAGRAMS OF ALGEBRAS OF SL2-INVARIANTS L. BEDRATYUK, A. E. BROUWER Abstract. For the algebras of SL2-invariants of small homological dimension the free graded resolutions and graded Betti graded free res- olutions and graded Betti diagrams for the algebras of SL2-invariants I in the cases hd

Brouwer, Andries E.

314

Minimum Energy Diagrams for Multieffect Distillation Arrangements  

E-Print Network (OSTI)

and the energy use from this process accounts for an estimated 3% of the world energy consumption.1 With rising on the overall plant energy consumption. The use of heat integration combined with complex config- urations distillation ar- rangements. An easy form of comparison for energy consumption is the minimum vapor flow rate

Skogestad, Sigurd

315

Experimental study on pV indicator diagrams of twin-screw refrigeration compressor with economizer  

Science Journals Connector (OSTI)

This paper presents the experimental investigation on the effects of the superfeed pressure together with economizer type on the performance of the twin-screw refrigeration compressor by means of the indicator diagram. With a pressure sensor embedded into the groove at the root of the female rotor on the discharge side, the pressure within the working chamber of a semi-hermetic twin-screw compressor with an economizer is recorded and then transformed into the indicator diagram. The results thus obtained are utilized to investigate the thermodynamic process of the compressor. It is shown that the compressor with an economizer has higher pressure during almost the whole compression process than without an economizer, resulting in the increase in the indicated power. Under different superfeed pressures, the pressure within the compression experiences different changes. This results in an optimal superfeed pressure for maximized compressor efficiency, which can be identified from the calculated compressor efficiency based on the indicator diagrams. It is also found that the pressure has a rapid increase at the beginning of superfeed process, and then a slow rise even a slight drop at the end of superfeed process, which is caused by the dynamic effect during superfeed process. Furthermore, if the superfeed pressure keeps the same, the pressure during compression in the compressor with the heat exchanger economizer is slightly higher than with the flash tank economizer, due to the higher temperature of superfeed refrigerant gas in the former case.

Huagen Wu; Xueyuan Peng; Ziwen Xing; Pengcheng Shu

2004-01-01T23:59:59.000Z

316

Gas Flux Sampling | Open Energy Information  

Open Energy Info (EERE)

Gas Flux Sampling Gas Flux Sampling Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Gas Flux Sampling Details Activities (26) Areas (20) Regions (0) NEPA(0) Exploration Technique Information Exploration Group: Field Techniques Exploration Sub Group: Field Sampling Parent Exploration Technique: Gas Sampling Information Provided by Technique Lithology: Stratigraphic/Structural: High flux can be indicative of conduits for fluid flow. Hydrological: Thermal: Anomalous flux is associated with active hydrothermal activity. Dictionary.png Gas Flux Sampling: Gas flux sampling measures the flow of volatile gas emissions from a specific location and compares it to average background emissions. Anomalously high gas flux can be an indication of hydrothermal activity.

317

Optimization Online - Consideration of Gas Supply Contracts with ...  

E-Print Network (OSTI)

Nov 18, 2008 ... ... natural gas (NG) providers, who supply gas for electric energy generators. In order to achieve more regularity for NG providers cash flows,...

Leonardo A. M. Moraes

2008-11-18T23:59:59.000Z

318

Structure and anomalous solubility for hard spheres in an associating lattice gas model  

E-Print Network (OSTI)

Structure and anomalous solubility for hard spheres in an associating lattice gas model Marcia M spheres in an associating lattice gas model Marcia M. Szortyka,1,a) Mauricio Girardi,2,b) Vera B-sphere gas in a solvent modeled as an associating lattice gas. The solution phase diagram for solute at 5

Barbosa, Marcia C. B.

319

High-efficiency separation of an ethylene/ethane mixture by a large-scale liquid-membrane contactor containing flat-sheet nonporous polymeric gas-separation membranes and a selective flowing-liquid absorbent  

SciTech Connect

Ethylene and ethane were effectively separated from a mixture comprising these two gases by means of a large-scale liquid-membrane contactor (membrane permabsorber). The contactor comprised composite flat-sheet membranes with a nonporous diffusional layer made from polyblock copolymer poly(dimethylsiloxane)/poly(phenylsilsesquioxane) and an aqueous solution of silver nitrate flowing along turbulence-promoter spacers between the membranes. The membrane permabsorber permitted ethylene and ethane to be separated effectively from a binary mixture. The problem with the selection of suitable membranes is discussed. It was shown that the efficiency of the separation process could be varied by changing the liquid-flow rate, the membrane area, the concentration of the selective carrier in the liquid, the temperature of the liquid absorbent, and the gas-separation properties of the membranes.

Bessarabov, D.G.; Sanderson, R.D.; Jacobs, E.P. [Univ. of Stellenbosch (Russian Federation). Inst. for Polymer Science; Beckman, I.N. [Moscow State Univ. (Russian Federation). Dept. of Chemistry

1995-05-01T23:59:59.000Z

320

Supersonic gas compressor  

DOE Patents (OSTI)

A gas compressor based on the use of a driven rotor having a compression ramp traveling at a local supersonic inlet velocity (based on the combination of inlet gas velocity and tangential speed of the ramp) which compresses inlet gas against a stationary sidewall. In using this method to compress inlet gas, the supersonic compressor efficiently achieves high compression ratios while utilizing a compact, stabilized gasdynamic flow path. Operated at supersonic speeds, the inlet stabilizes an oblique/normal shock system in the gasdyanamic flow path formed between the rim of the rotor, the strakes, and a stationary external housing. Part load efficiency is enhanced by the use of a pre-swirl compressor, and using a bypass stream to bleed a portion of the intermediate pressure gas after passing through the pre-swirl compressor back to the inlet of the pre-swirl compressor. Inlet guide vanes to the compression ramp enhance overall efficiency.

Lawlor, Shawn P. (Bellevue, WA); Novaresi, Mark A. (San Diego, CA); Cornelius, Charles C. (Kirkland, WA)

2007-11-13T23:59:59.000Z

Note: This page contains sample records for the topic "gas flow diagram" 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

Study of Heat Transfer in Non-boiling Two-phase Gas-liquid Flow in Pipes for Horizontal, Slightly Inclined, and Vertical Orientations.  

E-Print Network (OSTI)

??The main objective of this research is to establish a fundamental understanding of heat transfer in non-boiling two-phase pipe flow. The key processes that govern (more)

Tang, Clement Chih-Wei

2011-01-01T23:59:59.000Z

322

Continuous flow system for controlling phases separation near ? transition  

SciTech Connect

As demands on 3He are increasing and conventional 3He production through tritium decay is decreasing, alternative 3He production methods are becoming economically viable. One such possibility is to use entropy filters for extraction of the 3He isotope from natural gas. According to the phase diagram of the 3He, its solidification is impossible by only lowering of the temperature. Hence during the cooling process at stable pressure we can reach ?-point and pass to the special phase - He II. The total density of HeII is a sum of the two phases: normal the superfluid ones. It is possible to separate these two phases with an entropy filter - the barrier for the classically-behaving normal phase. This barrier can also be used to separate the two main isotopes of He: 4He and 3He, because at temperatures close to the 4He-?-point the 3He isotope is part of the normal phase. The paper presents continuous flow schemes of different separation methods of 3He from helium commodity coming from natural gas cryogenic processing. An overall thermodynamic efficiency of the 3He/4He separation process is presented. A simplified model of continuous flow HeI -HeII recuperative heat exchanger is given. Ceramic and carbon porous plugs have been tested in entropy filter applications.

Chorowski, M.; Poli?ski, J. [Wroc?aw University of Technology, Wybrze?e Wyspia?skiego 27,50-560 Wroc?aw (Poland); Kempi?ski, W.; Trybu?a, Z.; ?o?, Sz. [Institute of Molecular Physics, Polish Academy of Sciences, ul. Smoluchowskiego 17,60-179 Pozna? (Poland); Cho?ast, K.; Kociemba, A. [Polish Oil and Gas Company, Odolanow, ul. Krotoszynska 148, 63-430 Odolanow (Poland)

2014-01-29T23:59:59.000Z

323

The presentation of electrode potentials using an energy level diagram  

Science Journals Connector (OSTI)

The tabular form in which standard electrode potentials are usually presented often leads to confusion that can be diminished by representing the electrochemical series on an energy diagram like that provided.

T. A. Pinfold

1972-01-01T23:59:59.000Z

324

Correctness of depiction in planar diagrams of spatial figures  

E-Print Network (OSTI)

We show that it is possible to decide whether a given planar diagram correctly depicts the spatial figure consisting of a planar quadrangle together with its shadow in another plane.

P. L. Robinson

2014-03-12T23:59:59.000Z

325

Heat transfer characteristics of circular impinging jet arrays in an annular section with cross flow effects  

E-Print Network (OSTI)

. . Heat transfer and Flutd flow results ? Counter flow . 32 64 CONCLUSIONS . 101 REFERENCES . 104 APPENDIX A. APPENDIX B APPENDIX C LIST OF FIGURES FIGURE 1 Detailed Schematic of the Test Section with the Flow Loop for 81. 27cm Inner pipe... with Parallel Flow. . 2 Schematic Diagram showing the arrangement of the mner pipes with different diameters with the copper segments. 3 Schematic of the test section showmg the two different flow arrangements (Parallel Flow and Counter Flow) . Page 12 14...

Mhetras, Shantanu Prakash

2012-06-07T23:59:59.000Z

326

Landfill Gas Generation and Transport In Bioreactor Landfill  

Science Journals Connector (OSTI)

The activation gas and water flow each other in Bioreactor Landfill. Based on the porous media seepage and ... of water and waste components decomposition for describing landfill gas flow have been developed, and...

Qi-Lin Feng; Lei Liu; Qiang Xue; Ying Zhao

2010-01-01T23:59:59.000Z

327

Crossed diagrams for transport in substitutional binary alloys  

Science Journals Connector (OSTI)

We have adapted the method of summing crossed diagrams to the case of substitutional binary alloys. The summation is done by explicitly uncrossing the diagrams to look like ladders. Details are presented for the case of a single-band model of a simple-cubic lattice with nearest-neighbor hopping. The critical concentration at which the conductivity goes to zero is estimated. Some aspects of the generalization of this method to realistic models of binary alloys are discussed.

S. M. Chitanvis

1985-03-15T23:59:59.000Z

328

Gas Sampling | Open Energy Information  

Open Energy Info (EERE)

Gas Sampling Gas Sampling Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Gas Sampling Details Activities (7) Areas (7) Regions (0) NEPA(0) Exploration Technique Information Exploration Group: Field Techniques Exploration Sub Group: Field Sampling Parent Exploration Technique: Field Sampling Information Provided by Technique Lithology: Stratigraphic/Structural: High flux can be indicative of conduits for fluid flow. Hydrological: Gas composition and source of fluids. Thermal: Anomalous flux is associated with active hydrothermal activity. Distinguish magmatic/mantle heat inputs. Can be used to estimate reservoir fluid temperatures. Dictionary.png Gas Sampling: Gas sampling is done to characterize the chemical, thermal, and hydrological properties of a surface or subsurface hydrothermal system.

329

9.11.2014bo Akademi Univ -Thermal and Flow Engineering Piispankatu 8, 20500 Turku 1/44 3. Absorption, gas expansion and  

E-Print Network (OSTI)

Thermal and Flow Engineering Laboratory / Värme- och strömningsteknik tel. 3223 ; ron.zevenhoven@abo.fi Kylteknik ("KYL") Refrigeration course # 424503.0 v. 2014 ?A 424503 Refrigeration / Kylteknik 9.11.2014?bo energy, solar energy, biogas fuel, etc. Absorption refrigeration involves absorption of refrigerant

Zevenhoven, Ron

330

Direct fired absorption machine flue gas recuperator  

DOE Patents (OSTI)

A recuperator which recovers heat from a gas, generally the combustion gas of a direct-fired generator of an absorption machine. The recuperator includes a housing with liquid flowing therethrough, the liquid being in direct contact with the combustion gas for increasing the effectiveness of the heat transfer between the gas and the liquid.

Reimann, Robert C. (Lafayette, NY); Root, Richard A. (Spokane, WA)

1985-01-01T23:59:59.000Z

331

Application of a high-power KrF laser for the study of supersonic gas flows and the development of hydrodynamic instabilities in layered media  

SciTech Connect

The design of a miniature laser shock tube for the study of a wide range of hydrodynamic phenomena in liquids at pressures greater than 10 kbar and in supersonic flows with large Mach numbers (greater than 10) is discussed. A substance filling a chamber of quadratic cross section, with a characteristic size of several centimetres, is compressed and accelerated due to local absorption of 100 ns, 100 J KrF laser pulses near the entrance window. It is proposed to focus a laser beam by a prism raster, which provides a uniform intensity distribution over the tube cross section. The system can be used to study the hypersonic flow past objects of complex shape and the development of hydrodynamic instabilities in the case of a passage of a shock wave or a compression wave through the interfaces between different media. (laser applications and other topics in quantum electronics)

Zvorykin, V D; Lebo, I G [P.N. Lebedev Physics Institute, Russian Academy of Sciences, Moscow (Russian Federation)

2000-06-30T23:59:59.000Z

332

Chapter 1 - Natural Gas Fundamentals  

Science Journals Connector (OSTI)

Natural gas is the most energy-efficient fossil fuel; it offers important energy-saving benefits when it is used instead of oil or coal. Although the primary use of natural gas is as a fuel, it is also a source of hydrocarbons for petrochemical feedstocks and a major source of elemental sulfur, an important industrial chemical. Its popularity as an energy source is expected to grow substantially in the future because natural gas can help achieve two important energy goals for the twenty-first century: providing the sustainable energy supplies and services needed for social and economic development and reducing adverse impacts on global climate and the environment in general. Natural gas consumption and trade have been growing steadily over the past two decades, and natural gas has strengthened its position in the world energy mix. Although natural gas demand declined in 2009, as a result of the economic slowdown, it is expected to resume growth in both emerging and traditional markets in the coming decades. Such increase in the near future will be driven because of additional demand in current uses, primarily power generation. There is yet little overlap between the use of natural gas and oil in all large markets. However, there are certain moves in the horizon, including the electrifying of transportation, that will push natural gas use to ever higher levels. This book gives the reader an introduction to natural gas by describing the origin and composition of natural gas, gas sources, phase behavior and properties, and transportation methods. Keywords: Absolute Open Flow, bulk modulus of elasticity, coal-bed methane, cricondenbar, cricondentherm, Expected Ultimate Recovery, gas deviation factor, higher heating value, Inflow Performance Relationship, kerogen, laminar flow, liquefied natural gas, primary thermogenic gas, pyrobitumen, secondary thermogenic gas, super-compressibility factor, thiol, Tubing Performance Curve, turbulent flow, unconventional gas resources, Wobbe Index, Wobbe Number.

Saeid Mokhatab; William A. Poe

2012-01-01T23:59:59.000Z

333

EM Pnictide Phase Diagram - Argonne National Laboratories, Materials  

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

Materials > EM Pnictide Materials > EM Pnictide Phase Diagram Phase Diagram of Ba1-xKxFe2As2 Structural, magnetic, and superconducting phase diagram of Ba1-xK1-xFe2As2. Published May 7, 2012 The role of internal structural parameters that influence the band structure and the degree of moment localization in optimizing superconductivity and the implications for the gap symmetry in Ba1-xKxFe2As2 remains a matter of debate. Controlling the inhomogeneity to within acceptable limits to improve the accuracy of structural, magnetic, and superconducting phase boundaries has been a key goal of this work. We estimate that we have been able to synthesize samples for which Δx <0.01, suitable for systematic investigation using high-resolution neutron and x-ray diffraction combined with magnetization measurements.

334

Development of a fuel-rod simulator and small-diameter thermocouples for high-temperature, high-heat-flux tests in the Gas-Cooled Fast Reactor Core Flow Test Loop  

SciTech Connect

The Core Flow Test Loop was constructed to perform many of the safety, core design, and mechanical interaction tests in support of the Gas-Cooled Fast Reactor (GCFR) using electrically heated fuel rod simulators (FRSs). Operation includes many off-normal or postulated accident sequences including transient, high-power, and high-temperature operation. The FRS was developed to survive: (1) hundreds of hours of operation at 200 W/cm/sup 2/, 1000/sup 0/C cladding temperature, and (2) 40 h at 40 W/cm/sup 2/, 1200/sup 0/C cladding temperature. Six 0.5-mm type K sheathed thermocouples were placed inside the FRS cladding to measure steady-state and transient temperatures through clad melting at 1370/sup 0/C.

McCulloch, R.W.; MacPherson, R.E.

1983-03-01T23:59:59.000Z

335

Historical Natural Gas Annual  

Gasoline and Diesel Fuel Update (EIA)

6 6 The Historical Natural Gas Annual contains historical information on supply and disposition of natural gas at the national, regional, and State level as well as prices at selected points in the flow of gas from the wellhead to the burner-tip. Data include production, transmission within the United States, imports and exports of natural gas, underground storage activities, and deliveries to consumers. The publication presents historical data at the national level for 1930-1996 and detailed annual historical information by State for 1967-1996. The Historical Natural Gas Annual tables are available as self-extracting executable files in ASCII TXT or CDF file formats. Tables 1-3 present annual historical data at the national level for 1930-1996. The remaining tables contain detailed annual historical information, by State, for 1967-1996. Please read the file entitled READMEV2 for a description and documentation of information included in this file.

336

Historical Natural Gas Annual  

Gasoline and Diesel Fuel Update (EIA)

7 7 The Historical Natural Gas Annual contains historical information on supply and disposition of natural gas at the national, regional, and State level as well as prices at selected points in the flow of gas from the wellhead to the burner-tip. Data include production, transmission within the United States, imports and exports of natural gas, underground storage activities, and deliveries to consumers. The publication presents historical data at the national level for 1930-1997 and detailed annual historical information by State for 1967-1997. The Historical Natural Gas Annual tables are available as self-extracting executable files in ASCII TXT or CDF file formats. Tables 1-3 present annual historical data at the national level for 1930-1997. The remaining tables contain detailed annual historical information, by State, for 1967-1997. Please read the file entitled READMEV2 for a description and documentation of information included in this file.

337

Historical Natural Gas Annual  

Gasoline and Diesel Fuel Update (EIA)

8 8 The Historical Natural Gas Annual contains historical information on supply and disposition of natural gas at the national, regional, and State level as well as prices at selected points in the flow of gas from the wellhead to the burner-tip. Data include production, transmission within the United States, imports and exports of natural gas, underground storage activities, and deliveries to consumers. The publication presents historical data at the national level for 1930-1998 and detailed annual historical information by State for 1967-1998. The Historical Natural Gas Annual tables are available as self-extracting executable files in ASCII TXT or CDF file formats. Tables 1-3 present annual historical data at the national level for 1930-1998. The remaining tables contain detailed annual historical information, by State, for 1967-1998. Please read the file entitled READMEV2 for a description and documentation of information included in this file.

338

Multiphase Flow and Cavern Abandonment in Salt  

SciTech Connect

This report will explore the hypothesis that an underground cavity in gassy salt will eventually be gas filled as is observed on a small scale in some naturally occurring salt inclusions. First, a summary is presented on what is known about gas occurrences, flow mechanisms, and cavern behavior after abandonment. Then, background information is synthesized into theory on how gas can fill a cavern and simultaneously displace cavern fluids into the surrounding salt. Lastly, two-phase (gas and brine) flow visualization experiments are presented that demonstrate some of the associated flow mechanisms and support the theory and hypothesis that a cavity in salt can become gas filled after plugging and abandonment

Ehgartner, Brian; Tidwell, Vince

2001-02-13T23:59:59.000Z

339

Module bay with directed flow  

DOE Patents (OSTI)

A module bay requires less cleanroom airflow. A shaped gas inlet passage can allow cleanroom air into the module bay with flow velocity preferentially directed toward contaminant rich portions of a processing module in the module bay. Preferential gas flow direction can more efficiently purge contaminants from appropriate portions of the module bay, allowing a reduced cleanroom air flow rate for contaminant removal. A shelf extending from an air inlet slit in one wall of a module bay can direct air flowing therethrough toward contaminant-rich portions of the module bay, such as a junction between a lid and base of a processing module.

Torczynski, John R. (Albuquerque, NM)

2001-02-27T23:59:59.000Z

340

Phase diagram of two-color quark matter at nonzero baryon and isospin density  

SciTech Connect

We investigate the properties of cold dense quark matter composed of two colors and two flavors of light quarks. In particular, we perform the first model calculation of the full phase diagram at nonzero baryon and isospin density, thus matching the model-independent predictions of chiral perturbation theory at low density to the conjectured phase structure at high density. We confirm the presence of the Fulde-Ferrell phase in the phase diagram and study its dependence on the tunable parameter in the Lagrangian that simulates the effects of the quantum axial anomaly. As a by-product, we clarify the calculation of the thermodynamic potential in the presence of the Fulde-Ferrell pairing, which was previously based on an ad hoc subtraction of an unphysical cutoff artifact. Furthermore, we argue that close to the diquark (or pion) Bose-Einstein condensation transition, the system behaves as a dilute Bose gas so that our simple fermionic model in the mean-field approximation is not quantitatively adequate. We suggest that including thermal fluctuations of the order parameter for Bose-Einstein condensation is crucial for understanding available lattice data.

Andersen, Jens O. [Department of Physics, Norwegian University of Science and Technology, Hoegskoleringen 5, N-7491 Trondheim (Norway); Brauner, Tomas [Institut fuer Theoretische Physik, Goethe-Universitaet, Max-von-Laue-Strasse 1, D-60438 Frankfurt am Main (Germany)

2010-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "gas flow diagram" 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

Phase diagram of the CF{sub 4} monolayer and bilayer on graphite  

SciTech Connect

We report an experimental study of physisorbed monolayers and bilayers of CF{sub 4} on graphite using infrared reflection absorption spectroscopy supplemented by ellipsometry. The symmetric CF stretch mode ?{sub 3} near 1283 cm{sup ?1} in the gas is strongly blue shifted in the film by dynamic dipole coupling. This blue shift provides a very sensitive measure of the inter-molecular spacing in the monolayer and, less directly, in the bilayer. We find that important corrections are necessary to the volumetric coverage scales used in previous heat capacity and x-ray diffraction studies of this system. This requires quantitative and some qualitative changes to the previously proposed phase diagram. We find evidence for a new phase transition in the middle of the hexagonal incommensurate region and construct new phase diagrams in both the variables coverage-temperature and chemical potential-temperature. We determine the compressibility and thermal expansion in the low-pressure hexagonal incommensurate phase and values for the entropy change in several phase transitions. Below about 55 K there is evidence of solution of up to 7% of an impurity, most likely CO, in our monolayer but not the bilayer film.

Thomas, Petros; Hess, George B., E-mail: gbh@virginia.edu [Physics Department, University of Virginia, Charlottesville, Virginia 22904 (United States)

2014-05-21T23:59:59.000Z

342

Kinematical studies of the flows around free or surface-mounted obstacles; applying topology to flow visualization  

E-Print Network (OSTI)

). Inexplicably and inexcusably the diagrams of surface shear stress lines labelled figure 15(a) (i) and (ii. 570 should be replaced by the following text: Lykoudis (Purdue)gave an analysis of liquid-metal MHD- developed laminar-flow analysis for an MHD duct flow, to work out the effects of these two layers. He

Cambridge, University of

343

PostScript versions of Dynkin diagrams This note describes a package of encapsulated PostScript figures of Dynkin diagrams. They were first  

E-Print Network (OSTI)

the plain Dynkin diagrams for the finite root systems: File Diagram an.eps bn.eps cn.eps dn.eps e6.eps e7.eps e8.eps f4.eps g2.eps Here are the corresponding affine diagrams: File Diagram anz.eps bnz.eps cnz.eps #12;PostScript versions of Dynkin diagrams 2 dnz.eps e6z.eps e7z.eps e8z.eps f4z.eps g2z.eps Here

Casselman, William

344

Natural Gas  

Science Journals Connector (OSTI)

30 May 1974 research-article Natural Gas C. P. Coppack This paper reviews the world's existing natural gas reserves and future expectations, together with natural gas consumption in 1972, by main geographic...

1974-01-01T23:59:59.000Z

345

Magnetic phase diagram of small superconducting two-loop networks  

E-Print Network (OSTI)

The critical magnetic behaviour of simple superconducting micro-networks is illustrat- ed by discussing several properties of super- conducting micro-networks [1-3], see also [4]. This theoretical activity has beenL-277 Magnetic phase diagram of small superconducting two-loop networks J. Riess Centre de

Paris-Sud XI, Université de

346

Perturbation theory via Feynman diagrams in classical mechanics  

E-Print Network (OSTI)

In this paper we show how Feynman diagrams, which are used as a tool to implement perturbation theory in quantum field theory, can be very useful also in classical mechanics, provided we introduce also at the classical level concepts like path integrals and generating functionals.

R. Penco; D. Mauro

2006-05-05T23:59:59.000Z

347

The BPM to UML activity diagram transformation using XSLT  

E-Print Network (OSTI)

The BPM to UML activity diagram transformation using XSLT Ondrej Macek1 and Karel Richta1,2 1. Keywords: BPM, BPMN, UML, model transformation, XSLT 1 Introduction The Business Process Model (BPM of describing and improving business processes. The BPM can be described in various notations: in Business

348

MAGNETIC FIELDS IN THE HR DIAGRAM Jeffrey L. Linsky  

E-Print Network (OSTI)

MAGNETIC FIELDS IN THE HR DIAGRAM Jeffrey L. Linsky JILA/University of Colorado and NIST Solar IN SOLAR AND STELLAR ATMOSPHERES Heating Processes: MHD wave processes, rapid field annihilation processes has different properties and cell sizes than nor­ mal convection Wind: Alfv'en waves and other MHD

Linsky, Jeffrey L.

349

SINR Diagrams: Convexity and its Applications in Wireless Networks  

E-Print Network (OSTI)

from Cisco research center and the Israel Science Foundation (grant no. 894/09). Computer Engineering Science Foundation (grant no. 894/09). ¶ Department of Computer Science, Bar Ilan University, Ramat and related issues in computational geometry. So far, however, the properties of SINR diagrams have not been

350

Cloud computing and hyperbolic Voronoi diagrams on the sphere  

E-Print Network (OSTI)

In this work we study the minimization problem for the total distance in a cloud computing network on the sphere. We give a solution to this problem in terms of hyperbolic Voronoi diagrams on the sphere. We present results of computer simulations illustrating the solution.

Pavel Bleher; Caroline Shouraboura

2012-03-13T23:59:59.000Z

351

Carton motion-moment diagram and stiffness characteristics  

Science Journals Connector (OSTI)

To achieve the versatility in developing a packaging machine, it is imperative to understand the motion and stiffness characteristics of cartons during industrial folding and manipulation. It is desirable to describe carton and its folding procedure ... Keywords: equivalent mechanism, motion-moment diagram, packaging carton, stiffness

Guowu Wei; Ruirui Zhang; Jian S. Dai

2010-11-01T23:59:59.000Z

352

Temperature-pressure phase diagram of deuterated tetramethylammonium tetrachlorozincate  

E-Print Network (OSTI)

in the range 0 to 1.8 kbar and 2014 5 to 36 °C. This diagram is a nice illustration of the devil's staircase.4 and one with k 0.4. There the devil's staircase is incomplete, hysteresis appears at the lock-in transitions. At low P and T the devil's staircase is complete and behaviour irreversible

Boyer, Edmond

353

Shroud leakage flow discouragers  

DOE Patents (OSTI)

A turbine assembly includes a plurality of rotor blades comprising a root portion, an airfoil having a pressure sidewall and a suction sidewall, and a top portion having a cap. An outer shroud is concentrically disposed about said rotor blades, said shroud in combination with said tip portions defining a clearance gap. At least one circumferential shroud leakage discourager is disposed within the shroud. The leakage discourager(s) increase the flow resistance and thus reduce the flow of hot gas flow leakage for a given pressure differential across the clearance gap to improve overall turbine efficiency.

Bailey, Jeremy Clyde (Middle Grove, NY); Bunker, Ronald Scott (Niskayuna, NY)

2002-01-01T23:59:59.000Z

354

Bypass Flow Study  

SciTech Connect

The purpose of the fluid dynamics experiments in the MIR (Matched Index of-Refraction) flow system at Idaho National Laboratory (INL) is to develop benchmark databases for the assessment of Computational Fluid Dynamics (CFD) solutions of the momentum equations, scalar mixing, and turbulence models for the flow ratios between coolant channels and bypass gaps in the interstitial regions of typical prismatic standard fuel element (SFE) or upper reflector block geometries of typical Modular High-temperature Gas-cooled Reactors (MHTGR) in the limiting case of negligible buoyancy and constant fluid properties. The experiments use Particle Image Velocimetry (PIV) to measure the velocity fields that will populate the bypass flow study database.

Richard Schultz

2011-09-01T23:59:59.000Z

355

Y-12 Plant decontamination and decommissioning technology logic diagram for Building 9201-4: Volume 2, Technology Logic Diagram  

SciTech Connect

The Y-12 Plant Decontamination and Decommissioning Technology Logic Diagram for Building 9201-4 (TLD) was developed to provide a decision-support tool that relates decontamination and decommissioning (D&D) problems at 9201-4 to potential technologies that can remediate these problems. The TLD uses information from the Strategic Roadmap for the Oak Ridge Reservation, the Oak K-25 Site technology Logic Diagram, and Oak Ridge National Laboratory Technology Logic Diagram, and a previous Hanford logic diagram. This TLD identifies the research, development, demonstration, testing, and evaluation needed for sufficient development of these technologies to allow for technology transfer and application to D&D and waste management activities. It is essential that follow-on engineering studies be conducted to build on the output of this project. These studies will begin by selecting the most promising technologies identified in the TLD and by finding an optimum mix of technologies that will provide a socially acceptable balance between the cost and risk. The TLD consists of three volumes. Volume 1 presents an overview of the TLD, an explanation of the program-specific responsibilities, a review of identified technologies, and the rankings of remedial technologies. Volume 2 contains the logic linkages among the environmental management goals, environmental problems, and the various technologies that have the potential to solve these problems. Volume 3 contains the TLD data sheets.

NONE

1994-09-01T23:59:59.000Z

356

US energy flow, 1991  

SciTech Connect

Trends in energy consumption and assessment of energy sources are discussed. Specific topics discussed include: energy flow charts; comparison of energy use with 1990 and earlier years; supply and demand of fossil fuels (oils, natural gas, coal); electrical supply and demand; and nuclear power.

Borg, I.Y.; Briggs, C.K.

1992-06-01T23:59:59.000Z

357

Emerging Energy-Efficiency and Greenhouse Gas Mitigation Technologies for the Pulp and Paper Industry  

E-Print Network (OSTI)

economics of black liquor gasifier/gas turbine cogenerationblack liquor and biomass gasifier/gas turbine technology".entrained flow booster gasifier in New Bern, North Carolina;

Kong, Lingbo

2014-01-01T23:59:59.000Z

358

Seismic Absorption and Modulus Measurements in Porous Rocks Under Fluid and Gas Flow-Physical and Chemical Effects: a Laboratory Study  

SciTech Connect

This paper describes the culmination of a research project in which we investigated the complex modulus change in partially fluid saturated porous rocks. The investigation started with simple flow experiments over ''clean'' and ''contaminated'' surfaces, progressed to moduli measurements on partially filled single cracks, to measurements in ''clean'' and ''contaminated'' porous rocks and finally to a feasibility study in the field. For the experiments with the simple geometries we were able to measure fundamental physical properties such as contact angles of the meniscus and time dependent forces required to get the meniscus moving and to keep it moving at various velocities. From the data thus gathered we were able to interpret the complex elastic moduli data we measured in the partially saturated single cracks. While the geometry in real rocks is too complex to make precise calculations we determined that we had indeed identified the mechanisms responsible for the changes in the moduli we had measured. Thus encouraged by the laboratory studies we embarked on a field experiment in the desert of Arizona. The field site allowed for controlled irrigation. Instrumentation for fluid sampling and water penetration were already in place. The porous loosely consolidated rocks at the site were not ideal for finding the effects of the attenuation mechanism we had identified in the lab, but for logistic and cost constraint reasons we chose to field test the idea at that site. Tiltmeters and seismometers were installed and operated nearly continuously for almost 3 years. The field was irrigated with water in the fall of 2003 and with water containing a biosurfactant in the fall of 2004. We have indications that the biosurfactant irrigation has had a notable effect on the tilt data.

Harmut Spetzler

2005-11-28T23:59:59.000Z

359

Microsoft Word - PMCDP Knowledge Diagram Updates March 26 2009.doc  

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

(PMCDP) KNOWLEDGE DIAGRAM (PMCDP) KNOWLEDGE DIAGRAM Certification is based on competencies and is cumulative. For example, to fulfill requirements for Level 3, competency requirements for Levels 1, 2, and 3 must be attained. 1 Competency (Knowledge/Skill) Category Project Director Level Core Courses, Electives, and Work/Development Activities 1. General Project Management 2. Leadership / Team Building 3. Scope Management 4. Communication Management 5. Quality / Safety Management 6. Cost Management 7. Time Management 8. Risk Management 9. Contract Management 10. Integration Management PM Level 1 FPD for projects with TPC Greater than $5M and equal to or less than $20 million Core Courses: 1. Project Management Essentials* 2. Project Management Systems and Practices in DOE

360

Microsoft Word - Knowledge Diagram 4_30_2008.doc  

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

PMCDP) KNOWLEDGE DIAGRAM PMCDP) KNOWLEDGE DIAGRAM Certification is based on competencies and is cumulative. For example, to fulfill requirements for Level 3, competency requirements for Levels 1, 2, and 3 must be attained. Competency (Knowledge/Skill) Category Project Director Level Core Courses, Electives, and Work/Development Activities 1. General Project Management 2. Leadership / Team Building 3. Scope Management 4. Communication Management 5. Quality / Safety Management 6. Cost Management 7. Time Management 8. Risk Management 9. Contract Management 10. Integration Management PM Level 1 FPD for projects with TPC Greater than $5M and equal to or less than $20 million Core Courses: 1. Project Management (PM) Essentials* 2. Project Management Systems and Practices in DOE

Note: This page contains sample records for the topic "gas flow diagram" 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

Use of S-. alpha. diagram for representing tokamak equilibrium  

SciTech Connect

A use of the S-{alpha} diagram is proposed as a tool for representing the plasma equilibrium with a qualitative characterization of its stability through pattern recognition. The diagram is an effective tool for visually presenting the relationship between the shear and dimensionless pressure gradient of an equilibrium. In the PBX-M tokamak, an H-mode operating regime with high poloidal {beta} and L-mode regime with high toroidal {beta}, obtained using different profile modification techniques, are found to have distinct S-{alpha} trajectory patterns. Pellet injection into a plasma in the H-mode regime with high toroidal {beta}, obtained using different profile modification techniques, are found to have distinct S-{alpha} trajectory patterns. Pellet injection into a plasma in the H-mode regime results in favorable qualities of both regimes. The {beta} collapse process and ELM event also manifest themselves as characteristic changes in the S-{alpha} pattern.

Takahashi, H.; Chance, M.; Kessel, C.; LeBlanc, B.; Manickam, J.; Okabayashi, M.

1991-05-01T23:59:59.000Z

362

Design of processes with reactive distillation line diagrams  

SciTech Connect

On the basis of the transformation of concentration coordinates, the concept of reactive distillation lines is developed. It is applied to study the feasibility of a reactive distillation with an equilibrium reaction on all trays of a distillation column. The singular points in the distillation line diagrams are characterized in terms of nodes and saddles. Depending on the characterization of the reactive distillation line diagrams, it can be decided whether a column with two feed stages is required. On the basis of the reaction space concept, a procedure for identification of reactive distillation processes is developed, in which the reactive distillation column has to be divided into reactive and nonreactive sections. This can be necessary to overcome the limitations in separation which result from the chemical equilibrium. The concentration profile of this combined reactive/nonreactive distillation column is estimated using combined reactive/nonreactive distillation lines.

Bessling, B. [BASF Ludwigshafen (Germany). Engineering Research and Development] [BASF Ludwigshafen (Germany). Engineering Research and Development; Schembecker, G.; Simmrock, K.H. [Univ. of Dortmund (Germany). Dept. of Chemical Engineering] [Univ. of Dortmund (Germany). Dept. of Chemical Engineering

1997-08-01T23:59:59.000Z

363

Temperatureentropy diagram for an irreversible absorption refrigeration cycle  

Science Journals Connector (OSTI)

This article develops the theoretical foundation for the temperatureentropy (Ts) diagram for irreversible absorption chillers that employ either a volatile or nonvolatile working pair. The representation of a real absorption refrigeration cycle on a Ts diagram can directly depict the energetic superiority of one design over another. For practical usage this diagrammatic approach only requires as inputs the inlet and outlet state points that can be computed based on the corresponding temperatures pressures and component concentrations of each of the heat-and-mass exchanger modules within a chiller system and can therefore also be employed as a useful tool for system analysis and diagnosis. The same method is also applicable to any continuously operating thermodynamic system that is wholly or partially driven by thermal power.

H. T. Chua; H. K. Toh; K. C. Ng

2000-01-01T23:59:59.000Z

364

Phase Diagrams of Electrostatically Self-Assembled Amphiplexes  

SciTech Connect

We present the phase diagrams of electrostatically self-assembled amphiplexes (ESA) comprised of poly(acrylic acid) (PAA), cetyltrimethylammonium chloride (CTACl), dodecane, pentanol, and water at three different NaCl salt concentrations: 100, 300, and 500 mM. This is the first report of phase diagrams for these quinary complexes. Adding a cosurfactant, we were able to swell the unit cell size of all long-range ordered phases (lamellar, hexagonal, Pm3n, Ia3d) by almost a factor of 2. The added advantage of tuning the unit cell size makes such complexes (especially the bicontinuous phases) attractive for applications in bioseparation, drug delivery, and possibly in oil recovery.

V Stanic; M Mancuso; W Wong; E DiMasi; H Strey

2011-12-31T23:59:59.000Z

365

E-Print Network 3.0 - ag-cu-in phase diagram Sample Search Results  

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

de Alagoas, CEP 57000, Maceib, Brazil Abstract. -The phase diagram of the spin one Ising... region of the ground state. We study the phase diagram of the spin one Ising model...

366

Phase Diagram of Fully Developed Drainage in Porous Media  

SciTech Connect

Using concepts of invasion percolation in a gradient, we develop a phase diagram of fully developed drainage in porous media. The transition between stabilized displacement (where the conventional continuum applies) and fingering is controlled by the change of the sign of the gradient of the percolation probability (from stabilizing to destabilizing). The transition boundary is described by scaling laws. {copyright} {ital 1997} {ital The American Physical Society}

Yortsos, Y.C.; Xu, B. [Petroleum Engineering Program, Department of Chemical Engineering, University of Southern California, Los Angeles, California 90089-1211 (United States)] [Petroleum Engineering Program, Department of Chemical Engineering, University of Southern California, Los Angeles, California 90089-1211 (United States); Salin, D. [Laboratoire Fluides, Automatique et Systemes Thermiques, Universite Paris VI and XI, associated with C.N.R.S. (URA 871), Batiment 502, Campus Universitaire, 91405 Orsay Cedex (France)] [Laboratoire Fluides, Automatique et Systemes Thermiques, Universite Paris VI and XI, associated with C.N.R.S. (URA 871), Batiment 502, Campus Universitaire, 91405 Orsay Cedex (France)

1997-12-01T23:59:59.000Z

367

Cotton flow  

E-Print Network (OSTI)

Using the conformally invariant Cotton tensor, we define a geometric flow, the "Cotton flow", which is exclusive to three dimensions. This flow tends to evolve the initial metrics into conformally flat ones, and is somewhat orthogonal to the Yamabe flow, the latter being a flow within a conformal class. We define an entropy functional, and study the flow of nine homogeneous spaces both numerically and analytically. In particular, we show that the arbitrarily deformed homogeneous 3-sphere flows into the round 3-sphere. Two of the nine homogeneous geometries, which are degenerated by the Ricci flow, are left intact by the Cotton flow.

Ali Ulas Ozgur Kisisel; Ozgur Sarioglu; Bayram Tekin

2008-06-17T23:59:59.000Z

368

E-Print Network 3.0 - approach mass flow Sample Search Results  

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

OF GAS LIFTED WELLS BASED ON STATE ESTIMATION Summary: approaches to eliminate highly oscillating well flow in gas lifted wells: The first approach is to increase... index, PI,...

369

Designing a model for reliability improvement with FTA and FMEA techniques on medical gas outlet  

Science Journals Connector (OSTI)

In this case study of medical equipment industry, a reliability improvement cycle was conducted about medical gas outlet. Outlet connects four main hospital gases including oxygen, vacuum, air and nitroxide from hospital gas lines to certain equipment such as flowmeter, suction and other medical equipment by adaptor. Outlet product was chosen because it is a necessary and sensitive product in a hospital, and a small mistake during its production and installation can endanger a patient's life. In this study, reliability allocation was initially carried out for outlet parts. Two valves and spring were identified as important parts by means of tools such as functional flow block diagram and N*N that recognised system parts and their relationships. Then, fault tree analysis (FTA), failure modes and effective analysis (FMEA) were performed. System reliability was calculated via Bayesian method. Finally, improvement and redesigning were performed for system. In this study, a new model was proposed for reliability improvement of the products. In addition, reliability of medical gas outlet was increased.

Marzieh Sadeghi; Mehdi Karbasiyan; Mehrzad Navabakhsh

2014-01-01T23:59:59.000Z

370

A CSP View on UMLRT structure diagrams Clemens Fischer, ErnstRudiger Olderog and Heike Wehrheim  

E-Print Network (OSTI)

A CSP View on UML­RT structure diagrams Clemens Fischer, Ernst­R¨udiger Olderog and Heike Wehrheim UML­RT structure diagrams together with the formal method CSP­OZ combining CSP and Object­Z. While CSP­OZ is used for specifying the system components themselves (by CSP­OZ classes), UML­RT diagrams provide

Habel, Annegret

371

Function Block Diagrams * {ekjee, jbyoo, suhyun, cha}@dependable.kaist.ac.kr  

E-Print Network (OSTI)

}@dependable.kaist.ac.kr : FBD(Function Block Diagram) FBD . PLC FBD C . FBD . FBD Center(ITRC). RLL(Relay Ladder Logic) , . PLC(Programmable Logic Controller) [2] , LD(Ladder Diagram) FBD(Function Block Diagram) PLC . PLC . PLC

372

Query Processing for Probabilistic State Diagrams Describing Multiple Robot Navigation in an Indoor Environment  

SciTech Connect

This paper describes the syntax and semantics of multi-level state diagrams to support probabilistic behavior of cooperating robots. The techniques are presented to analyze these diagrams by querying combined robots behaviors. It is shown how to use state abstraction and transition abstraction to create, verify and process large probabilistic state diagrams.

Czejdo, Bogdan [ORNL; Bhattacharya, Sambit [North Carolina Fayetteville State University; Ferragut, Erik M [ORNL

2012-01-01T23:59:59.000Z

373

Guiding the designer: A radar diagram process for applications with multiple layers  

Science Journals Connector (OSTI)

......called the radar diagram process for multiple...that some of the material in Section 3...or skills for handling controls to regulate...them. A radar diagram was created based...editing and image handling has a continuous...in the radar diagram, which indicated...medium skilled in handling PhotoShop Elements......

Linn Gustavsson Christiernin

2010-03-01T23:59:59.000Z

374

Transport properties of a meson gas  

E-Print Network (OSTI)

We present recent results on a systematic method to calculate transport coefficients for a meson gas (in particular, we analyze a pion gas) at low temperatures in the context of Chiral Perturbation Theory. Our method is based on the study of Feynman diagrams with a power counting which takes into account collisions in the plasma by means of a non-zero particle width. In this way, we obtain results compatible with analysis of Kinetic Theory with just the leading order diagram. We show the behavior with temperature of electrical and thermal conductivities and shear and bulk viscosities, and we discuss the fundamental role played by unitarity. We obtain that bulk viscosity is negligible against shear viscosity near the chiral phase transition. Relations between the different transport coefficients and bounds on them based on different theoretical approximations are also discussed. We also comment on some applications to heavy-ion collisions.

D. Fernandez-Fraile; A. Gomez Nicola

2007-07-09T23:59:59.000Z

375

Gas turbine combustor transition  

DOE Patents (OSTI)

A method is described for converting a steam cooled transition to an air cooled transition in a gas turbine having a compressor in fluid communication with a combustor, a turbine section in fluid communication with the combustor, the transition disposed in a combustor shell and having a cooling circuit connecting a steam outlet and a steam inlet and wherein hot gas flows from the combustor through the transition and to the turbine section, includes forming an air outlet in the transition in fluid communication with the cooling circuit and providing for an air inlet in the transition in fluid communication with the cooling circuit. 7 figs.

Coslow, B.J.; Whidden, G.L.

1999-05-25T23:59:59.000Z

376

Scaling in the Lattice Gas Model  

E-Print Network (OSTI)

A good quality scaling of the cluster size distributions is obtained for the Lattice Gas Model using the Fisher's ansatz for the scaling function. This scaling identifies a pseudo-critical line in the phase diagram of the model that spans the whole (subcritical to supercritical) density range. The independent cluster hypothesis of the Fisher approach is shown to describe correctly the thermodynamics of the lattice only far away from the critical point.

F. Gulminelli; Ph. Chomaz; M. Bruno; M. D'Agostino

2002-01-18T23:59:59.000Z

377

Gas-cooled nuclear reactor  

DOE Patents (OSTI)

A gas-cooled nuclear reactor includes a central core located in the lower portion of a prestressed concrete reactor vessel. Primary coolant gas flows upward through the core and into four overlying heat-exchangers wherein stream is generated. During normal operation, the return flow of coolant is between the core and the vessel sidewall to a pair of motor-driven circulators located at about the bottom of the concrete pressure vessel. The circulators repressurize the gas coolant and return it back to the core through passageways in the underlying core structure. If during emergency conditions the primary circulators are no longer functioning, the decay heat is effectively removed from the core by means of natural convection circulation. The hot gas rising through the core exits the top of the shroud of the heat-exchangers and flows radially outward to the sidewall of the concrete pressure vessel. A metal liner covers the entire inside concrete surfaces of the concrete pressure vessel, and cooling tubes are welded to the exterior or concrete side of the metal liner. The gas coolant is in direct contact with the interior surface of the metal liner and transfers its heat through the metal liner to the liquid coolant flowing through the cooling tubes. The cooler gas is more dense and creates a downward convection flow in the region between the core and the sidewall until it reaches the bottom of the concrete pressure vessel when it flows radially inward and up into the core for another pass. Water is forced to flow through the cooling tubes to absorb heat from the core at a sufficient rate to remove enough of the decay heat created in the core to prevent overheating of the core or the vessel.

Peinado, Charles O. (La Jolla, CA); Koutz, Stanley L. (San Diego, CA)

1985-01-01T23:59:59.000Z

378

Gas Turbines  

Science Journals Connector (OSTI)

When the gas turbine generator was introduced to the power generation ... fossil-fueled power plant. Twenty years later, gas turbines were established as an important means of ... on utility systems. By the early...

Jeffrey M. Smith

1996-01-01T23:59:59.000Z

379

NUTHOS-6 2004 Direct Control Flow Testing on Function Block Diagrams  

E-Print Network (OSTI)

. - FBD - LD - etc. SDS - Nat. Lang. - FBD - LD - etc. SRS - Nat. Lang. - SCR - NuSCR SRS - Nat. Lang. - SCR - NuSCR CASE Tool *.exe Code-based Testing - C - Ada - etc. #12;3 Proposed Testing Approach Direct. - FBD - LD - etc. SRS - Nat. Lang. - SCR - NuSCR SRS - Nat. Lang. - SCR - NuSCR PLC CASE Tool *.exe Code

380

EIA - Natural Gas Pipeline Network - Major Natural Gas Transportation  

U.S. Energy Information Administration (EIA) Indexed Site

Natural Gas Transportation Corridors Natural Gas Transportation Corridors About U.S. Natural Gas Pipelines - Transporting Natural Gas based on data through 2007/2008 with selected updates Major Natural Gas Transportation Corridors Corridors from the Southwest | From Canada | From Rocky Mountain Area | Details about Transportation Corridors The national natural gas delivery network is intricate and expansive, but most of the major transportation routes can be broadly categorized into 11 distinct corridors or flow patterns. 5 major routes extend from the producing areas of the Southwest 4 routes enter the United States from Canada 2 originate in the Rocky Mountain area. A summary of the major corridors and links to details about each corridor are provided below. Corridors from the Southwest Region

Note: This page contains sample records for the topic "gas flow diagram" 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

Gas Turbines  

Science Journals Connector (OSTI)

... the time to separate out the essentials and the irrelevancies in a text-book. The gas ...gasturbine ...

H. CONSTANT

1950-10-21T23:59:59.000Z

382

Automated gas chromatography  

DOE Patents (OSTI)

An apparatus and process for the continuous, near real-time monitoring of low-level concentrations of organic compounds in a liquid, and, more particularly, a water stream. A small liquid volume of flow from a liquid process stream containing organic compounds is diverted by an automated process to a heated vaporization capillary where the liquid volume is vaporized to a gas that flows to an automated gas chromatograph separation column to chromatographically separate the organic compounds. Organic compounds are detected and the information transmitted to a control system for use in process control. Concentrations of organic compounds less than one part per million are detected in less than one minute. 7 figs.

Mowry, C.D.; Blair, D.S.; Rodacy, P.J.; Reber, S.D.

1999-07-13T23:59:59.000Z

383

1 of 3 + 1 page diagram Process Engineering Thermodynamics  

E-Print Network (OSTI)

bar = 105 Pa if not stated otherwise. 102. A gas mixture composed of 30%-vol CO2 + 70% N2 %-vol%- vol O2 + 0.04%-vol CO2 at 20°C, 1 bar. Calculate the exergy losses per kg of emitted gas as a result, can the value of G = 0.1 be obtained with a gas that contains CO2 as the only participating

Zevenhoven, Ron

384

An Integrated Modeling Analysis of Unsaturated Flow Patterns in Fractured Rock  

E-Print Network (OSTI)

study, heat flow simulations use a 3-D thermal model grid (model grid, which is used for gas flow and ambient heat-flowgrid showing a smaller model domain, used for modeling gas and heat

Wu, Yu-Shu; Lu, Guoping; Zhang, Keni; Pan, Lehua; Bodvarsson, Gudmundur S.

2008-01-01T23:59:59.000Z

385

Analyzing flow patterns in unsaturated fractured rock of Yucca Mountain using an integrated modeling approach  

E-Print Network (OSTI)

heat flow simulations use the 3-D thermal model grid (Figuremodel grid, which is used for gas flow and ambient heat flowgrid showing a smaller model domain, used for modeling gas and heat

Wu, Yu-Shu; Lu, Guoping; Zhang, Keni; Pan, Lehua; Bodvarsson, Gudmundur S.

2008-01-01T23:59:59.000Z

386

System for measuring multiphase flow using multiple pressure differentials  

DOE Patents (OSTI)

An improved method and system for measuring a multi-phase flow in a pressure flow meter. An extended throat venturi is used and pressure of the multi-phase flow is measured at three or more positions in the venturi, which define two or more pressure differentials in the flow conduit. The differential pressures are then used to calculate the mass flow of the gas phase, the total mass flow, and the liquid phase. The system for determining the mass flow of the high void fraction fluid flow and the gas flow includes taking into account a pressure drop experienced by the gas phase due to work performed by the gas phase in accelerating the liquid phase.

Fincke, James R. (Idaho Falls, ID)

2003-01-01T23:59:59.000Z

387

EIA - Greenhouse Gas Emissions Overview  

Gasoline and Diesel Fuel Update (EIA)

Environment Environment Emissions of Greenhouse Gases in the U. S. Release Date: March 31, 2011 | Next Release Date: Report Discontinued | Report Number: DOE/EIA-0573(2009) Greenhouse Gas Emissions Overview Diagram Notes [a] CO2 emissions related to petroleum consumption (includes 64 MMTCO2 of non-fuel-related emissions). [b] CO2 emissions related to coal consumption (includes 0.3 MMTCO2 of non-fuel-related emissions). [c] CO2 emissions related to natural gas consumption (includes 13 MMTCO2 of non-fuel-related emissions). [d] Excludes carbon sequestered in nonfuel fossil products. [e] CO2 emissions from the plastics portion of municipal solid waste (11 MMTCO2) combusted for electricity generation and very small amounts (0.4 MMTCO2) of geothermal-related emissions.

388

Universal diagram for regimes of Z-pinch stability  

Science Journals Connector (OSTI)

The regimes for the applicability of various theoretical models for the stability of a Z pinch under pressure balance are shown to be clearly delineated in a diagram of ln(I4a) vs lnN, where I, a, and N are the current, pinch radius, and line density, respectively. In particular, the most unstable regime where ideal magnetohydrodynamics applies is shown to be restricted to a small-wedge-shaped region bounded by resistive, viscous, anisotropic, and finite Larmor radius effects. Recent experimental results of anomalous stability can be interpreted in terms of resistive or large-ion Larmor-radius effects.

M. G. Haines and M. Coppins

1991-03-18T23:59:59.000Z

389

Phase diagram for injection locking a superradiant laser  

E-Print Network (OSTI)

We experimentally and theoretically study the response of a superradiant or bad-cavity laser to an applied coherent drive. We observe two forms of synchronization (injection locking) between the superradiant ensemble and the applied drive: one attractive and one repulsive in nature. We explain the region of repulsion as arising from the higher three-dimensional description of the atomic spin state that stores the laser coherence in a superradiant laser, as opposed to a two-parameter description of the electric field in a traditional good-cavity laser. We derive a phase diagram of predicted behavior and experimentally measure the response of the system across various trajectories therein.

Kevin C. Cox; Joshua M. Weiner; James K. Thompson

2014-06-19T23:59:59.000Z

390

Ab initio calculations of surface phase diagrams of silica polymorphs  

Science Journals Connector (OSTI)

We present first-principle calculations of structural and electronic properties of several ?-quartz and ?-cristobalite surfaces. The effect of hydrogen passivation is investigated and it is demonstrated that in addition to significantly reducing the surface energy, hydrogen dramatically changes the surface phase diagram. We identify stability fields for single species surface termination and demonstrate that controlling the chemical environment allows a certain degree of process control of the surface termination and properties important in modern technology such as atomic layer deposition of high-k dielectrics and silicon on insulator.

Evgueni Chagarov; Alexander A. Demkov; James B. Adams

2005-02-23T23:59:59.000Z

391

Colorado Natural Gas Number of Gas and Gas Condensate Wells ...  

Annual Energy Outlook 2012 (EIA)

Gas and Gas Condensate Wells (Number of Elements) Colorado Natural Gas Number of Gas and Gas Condensate Wells (Number of Elements) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5...

392

California Natural Gas Number of Gas and Gas Condensate Wells...  

Annual Energy Outlook 2012 (EIA)

Gas and Gas Condensate Wells (Number of Elements) California Natural Gas Number of Gas and Gas Condensate Wells (Number of Elements) Decade Year-0 Year-1 Year-2 Year-3 Year-4...

393

Louisiana Natural Gas Number of Gas and Gas Condensate Wells...  

U.S. Energy Information Administration (EIA) Indexed Site

Gas and Gas Condensate Wells (Number of Elements) Louisiana Natural Gas Number of Gas and Gas Condensate Wells (Number of Elements) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5...

394

Michigan Natural Gas Number of Gas and Gas Condensate Wells ...  

Annual Energy Outlook 2012 (EIA)

Gas and Gas Condensate Wells (Number of Elements) Michigan Natural Gas Number of Gas and Gas Condensate Wells (Number of Elements) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5...

395

Oklahoma Natural Gas Number of Gas and Gas Condensate Wells ...  

U.S. Energy Information Administration (EIA) Indexed Site

Gas and Gas Condensate Wells (Number of Elements) Oklahoma Natural Gas Number of Gas and Gas Condensate Wells (Number of Elements) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5...

396

Virginia Natural Gas Number of Gas and Gas Condensate Wells ...  

Annual Energy Outlook 2012 (EIA)

Gas and Gas Condensate Wells (Number of Elements) Virginia Natural Gas Number of Gas and Gas Condensate Wells (Number of Elements) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5...

397

Tennessee Natural Gas Number of Gas and Gas Condensate Wells...  

U.S. Energy Information Administration (EIA) Indexed Site

Gas and Gas Condensate Wells (Number of Elements) Tennessee Natural Gas Number of Gas and Gas Condensate Wells (Number of Elements) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5...

398

Pennsylvania Natural Gas Number of Gas and Gas Condensate Wells...  

Gasoline and Diesel Fuel Update (EIA)

Gas and Gas Condensate Wells (Number of Elements) Pennsylvania Natural Gas Number of Gas and Gas Condensate Wells (Number of Elements) Decade Year-0 Year-1 Year-2 Year-3 Year-4...

399

Arkansas Natural Gas Number of Gas and Gas Condensate Wells ...  

Annual Energy Outlook 2012 (EIA)

Gas and Gas Condensate Wells (Number of Elements) Arkansas Natural Gas Number of Gas and Gas Condensate Wells (Number of Elements) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5...

400

Maryland Natural Gas Number of Gas and Gas Condensate Wells ...  

Gasoline and Diesel Fuel Update (EIA)

Gas and Gas Condensate Wells (Number of Elements) Maryland Natural Gas Number of Gas and Gas Condensate Wells (Number of Elements) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5...

Note: This page contains sample records for the topic "gas flow diagram" 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

Illinois Natural Gas Number of Gas and Gas Condensate Wells ...  

U.S. Energy Information Administration (EIA) Indexed Site

Gas and Gas Condensate Wells (Number of Elements) Illinois Natural Gas Number of Gas and Gas Condensate Wells (Number of Elements) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5...

402

Missouri Natural Gas Number of Gas and Gas Condensate Wells ...  

Gasoline and Diesel Fuel Update (EIA)

Gas and Gas Condensate Wells (Number of Elements) Missouri Natural Gas Number of Gas and Gas Condensate Wells (Number of Elements) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5...

403

Mississippi Natural Gas Number of Gas and Gas Condensate Wells...  

U.S. Energy Information Administration (EIA) Indexed Site

Gas and Gas Condensate Wells (Number of Elements) Mississippi Natural Gas Number of Gas and Gas Condensate Wells (Number of Elements) Decade Year-0 Year-1 Year-2 Year-3 Year-4...

404

Nebraska Natural Gas Number of Gas and Gas Condensate Wells ...  

Annual Energy Outlook 2012 (EIA)

Gas and Gas Condensate Wells (Number of Elements) Nebraska Natural Gas Number of Gas and Gas Condensate Wells (Number of Elements) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5...

405

Flow conditioner for fuel injector for combustor and method for low-NO.sub.x combustor  

DOE Patents (OSTI)

An injector for a gas turbine combustor including a catalyst coated surface forming a passage for feed gas flow and a channel for oxidant gas flow establishing an axial gas flow through a flow conditioner disposed at least partially within an inner wall of the injector. The flow conditioner includes a length with an interior passage opening into upstream and downstream ends for passage of the axial gas flow. An interior diameter of the interior passage smoothly reduces and then increases from upstream to downstream ends.

Dutta, Partha; Smith, Kenneth O.; Ritz, Frank J.

2013-09-10T23:59:59.000Z

406

U-GAS process  

SciTech Connect

The Institute of Gas Technology (IGT) has developed an advanced coal gasification process. The U-GAS process has been extensively tested in a pilot plant to firmly establish process feasibility and provide a large data base for scale-up and design of the first commercial plant. The U-GAS process is considered to be one of the more flexible, efficient, and economical coal gasification technologies developed in the US during the last decade. The U-GAS technology is presently available for licensing from GDC, Inc., a wholly-owned subsidiary of IGT. The U-GAS process accomplishes four important functions in a single-stage, fluidized-bed gasifier: It decakes coal, devolatilizes coal, gasifies coal, and agglomerates and separates ash from char. Simultaneously with coal gasification, the ash is agglomerated into spherical particles and separated from the bed. Part of the fluidizing gas enters the gasifier through a sloping grid. The remaining gas flows upward at a high velocity through the ash agglomerating device and forms a hot zone within the fluidized bed. High-ash-content particles agglomerate under these conditions and grow into larger and heavier particles. Agglomerates grow in size until they can be selectively separated and discharged from the bed into water-filled ash hoppers where they are withdrawn as a slurry. In this manner, the fluidized bed achieves the same low level of carbon losses in the discharge ash generally associated with the ash-slagging type of gasifier. Coal fines elutriated from the fluidized bed are collected in two external cyclones. Fines from the first cyclone are returned to the bed and fines from the second cyclone are returned to the ash agglomerating zone, where they are gasified, and the ash agglomerated with bed ash. The raw product gas is virtually free of tar and oils, thus simplifying ensuing heat recovery and purification steps.

Schora, F.C.; Patel, J.G.

1982-01-01T23:59:59.000Z

407

Phase Diagram of Diblock Copolymer Melt in Dimension d=5  

E-Print Network (OSTI)

Using the self-consistent field theory (SCFT) in spherical unit cells of various dimensionalities, D, a phase diagram of a diblock, A-b-B, is calculated in 5 dimensional space, d = 5. This is an extension of a previous work for d = 4. The phase diagram is parameterized by the chain composition, f, and incompatibility between A and B , quantified by the product \\c{hi} N. We predict 5 stable nanophases: layers, cylinders, 3 D spherical cells, 4D spherical cells, and 5D spherical cells. In the strong segregation limit, that is for large \\c{hi}N, the order-order transition compositions are determined by the strong segregation theory (SST) in its simplest form. While the predictions of the SST theory are close to the corresponding SCFT extrapolations for d=4, the extrapolations for d=5 significantly differ from them. We find that the S5 nanophase is stable in a narrow strip between the ordered S4 nanophase and the disordered phase. The calculated order-disorder transition lines depend weakly on d, as expected.

Michal Dziecielski; Krzysztof Lewandowski; Michal Banaszak

2014-10-11T23:59:59.000Z

408

Gas cooled traction drive inverter  

SciTech Connect

The present invention provides a modular circuit card configuration for distributing heat among a plurality of circuit cards. Each circuit card includes a housing adapted to dissipate heat in response to gas flow over the housing. In one aspect, a gas-cooled inverter includes a plurality of inverter circuit cards, and a plurality of circuit card housings, each of which encloses one of the plurality of inverter cards.

Chinthavali, Madhu Sudhan

2013-10-08T23:59:59.000Z

409

ELECTROLYTIC GAS EVOLUTION IN FORCED FLOW  

E-Print Network (OSTI)

brine 2. Although the water electrolysis industry is not aspower. Therefore, water electrolysis is used only when highpower, and so on. Water electrolysis has been considered as

Hui, Wing Cheong

2014-01-01T23:59:59.000Z

410

ELECTROLYTIC GAS EVOLUTION IN FORCED FLOW  

E-Print Network (OSTI)

of the system, and J the Tafel slope for the overpotential29). All of them obey the Tafel relation: "fJ =a- b log(constants (b is called the Tafel slope, a constant). All the

Hui, Wing Cheong

2014-01-01T23:59:59.000Z

411

Turbulent flow of gas in fractures  

E-Print Network (OSTI)

. Permeability for Shale core, 20 - 40 mesh sandals . . ~ . . . ~ . ~ . ~ 39 Concentration of proppants vs. Turbulence factor for Shale core, 10 - 20 mesh sands. ~ ~ . , 40 Concentration of proppants vs. Permeability for Shale cox e, 10 - 20 mesh sands... in Figures g and 4. 10 H J K L M A ~e Steel tubings PlaBtlt! tubitlgi mnnumm Alloy A. Core Sample B. Pressure cell C ~ Flowmeter D. High pressure water reservoir E. Heise guage, 10, 000 psi F. Husks pump G. Hydraulic pump, 40, 000 psi H...

Koh, Wong In

2012-06-07T23:59:59.000Z

412

On integrating large eddy simulation and laboratory turbulent flow experiments  

Science Journals Connector (OSTI)

...effective simulation strategy mostly by necessity...its analysis and development, further understanding...directed research and development program at Los...multi-swirl gas turbine combustor. Proc...simulation of a gas turbine combustor flow...

2009-01-01T23:59:59.000Z

413

Historical Natural Gas Annual - 1930 Through 2000  

Gasoline and Diesel Fuel Update (EIA)

Historical Natural Gas Annual Historical Natural Gas Annual 1930 Through 2000 EIA Home > Natural Gas > Natural Gas Data Publications Historical Natural Gas Annual The Historical Natural Gas Annual contains historical information on supply and disposition of natural gas at the national, regional, and State level as well as prices at selected points in the flow of gas from the wellhead to the burner-tip. Data include production, transmission within the United States, imports and exports of natural gas, underground storage activities, and deliveries to consumers. The publication presents historical data at the national level for 1930-2000 and detailed annual historical information by State for 1967-2000. To read reports in PDF format download a free copy of Adobe Acrobat Reader.

414

Pouring flows  

Science Journals Connector (OSTI)

Free surface flows of a liquid poured from a container are calculated numerically for various configurations of the lip. The flow is assumed to be steady two dimensional and irrotational; the liquid is treated as inviscid and incompressible; and gravity is taken into account. It is shown that there are jetlike flows with two free surfaces and other flows with one free surface which follow along the underside of the lip or spout. The latter flows occur in the well?known teapot effect which was treated previously without including gravity. Some of the results are applicable also to flows over weirs and spillways.

Jean?Marc Vanden?Broeck; Joseph B. Keller

1986-01-01T23:59:59.000Z

415

Y-12 Plant decontamination and decommissioning technology logic diagram for Building 9201-4. Volume 2: Technology logic diagram  

SciTech Connect

The Y-12 Plant Decontamination and Decommissioning Technology Logic Diagram for Building 9201-4 (TLD) was developed to provide a decision-support tool that relates decontamination and decommissioning (D and D) problems at Bldg. 9201-4 to potential technologies that can remediate these problems. This TLD identifies the research, development, demonstration, testing, and evaluation needed for sufficient development of these technologies to allow for technology transfer and application to D and D and waste management (WM) activities. It is essential that follow-on engineering studies be conducted to build on the output of this project. These studies will begin by selecting the most promising technologies identified in the TLD and by finding an optimum mix of technologies that will provide a socially acceptable balance between cost and risk. The TLD consists of three fundamentally separate volumes: Vol. 1 (Technology Evaluation), Vol. 2 (Technology Logic Diagram), and Vol. 3 (Technology Evaluation Data Sheets). Volume 2 contains the logic linkages among environmental management goals, environmental problems, and the various technologies that have the potential to solve these problems. Volume 2 has been divided into five sections: Characterization, Decontamination, Dismantlement, Robotics/Automation, and Waste Management. Each section contains logical breakdowns of the Y-12 D and D problems by subject area and identifies technologies that can be reasonably applied to each D and D challenge.

NONE

1994-09-01T23:59:59.000Z

416

Sedimentation stacking diagram of binary colloidal mixtures and bulk phases in the plane of chemical potentials  

E-Print Network (OSTI)

We give a full account of a recently proposed theory that explicitly relates the bulk phase diagram of a binary colloidal mixture to its phase stacking phenomenology under gravity [Soft Matter 9, 8636 (2013)]. As we demonstrate, the full set of possible phase stacking sequences in sedimentation-diffusion equilibrium originates from straight lines (sedimentation paths) in the chemical potential representation of the bulk phase diagram. From the analysis of various standard topologies of bulk phase diagrams, we conclude that the corresponding sedimentation stacking diagrams can be very rich, even more so when finite sample height is taken into account. We apply the theory to obtain the stacking diagram of a mixture of nonadsorbing polymers and colloids. We also present a catalog of generic phase diagrams in the plane of chemical potentials in order to facilitate the practical application of our concept, which also generalizes to multi component mixtures.

Daniel de las Heras; Matthias Schmidt

2014-11-19T23:59:59.000Z

417

Historical Natural Gas Annual 1999  

Gasoline and Diesel Fuel Update (EIA)

1999 1999 The Historical Natural Gas Annual contains historical information on supply and disposition of natural gas at the national, regional, and State level as well as prices at selected points in the flow of gas from the wellhead to the burner-tip. Data include production, transmission within the United States, imports and exports of natural gas, underground storage activities, and deliveries to consumers. The publication presents historical data at the national level for 1930-1999 and detailed annual historical information by State for 1967-1999. The Historical Natural Gas Annual tables are available as self-extracting executable files in ASCII TXT or CSV file formats. Tables 1-3 present annual historical data at the national level for 1930-1999. The remaining tables contain detailed annual historical information, by State, for 1967-1999. Please read the file entitled READMEV2 for a description and documentation of information included in this file.

418

Natural gas dehydration by desiccant materials  

Science Journals Connector (OSTI)

Water vapor in a natural gas stream can result in line plugging due to hydrate formation, reduction of line capacity due to collection of free water in the line, and increased risk of damage to the pipeline due to the corrosive effects of water. Therefore, water vapor must be removed from natural gas to prevent hydrate formation and corrosion from condensed water. Gas dehydration is the process of removing water vapor from a gas stream to lower the temperature at which water will condense from the stream; this temperature is called the dew point of the gas. Molecular sieves are considered as one of the most important materials that are used as desiccant materials in industrial natural gas dehydration. This work shows a study of natural gas dehydration using 3A molecular sieve as a type of solid desiccant materials, the scope of this work was to build up a pilot scale unit for a natural gas dehydration as simulation of actual existing plant for Egyptian Western Desert Gas Company (WDGC). The effect of different operating conditions (water vapor concentration and gas flow rate) on dehydration of natural gas was studied. The experimental setup consists of cylinder filled with 3A molecular sieve to form a fixed bed, then pass through this bed natural gas with different water vapor concentration, The experimental setup is fitted with facilities to control bed pressure, flow rate, measure water vapor concentration and bed temperature, a gas heater was used to activate molecular sieve bed. Increasing water vapor concentration in inlet feed gas leads to a marked decrease in dehydration efficiency. As expected, a higher inlet flow rate of natural gas decrease dehydration efficiency. Increasing feed pressure leads to higher dehydration efficiency.

Hassan A.A. Farag; Mustafa Mohamed Ezzat; Hoda Amer; Adel William Nashed

2011-01-01T23:59:59.000Z

419

ON THE STABILITY OF ROTATING MHD FLOWS MARTY PH, MARTIN WITKOWSKI L,  

E-Print Network (OSTI)

ON THE STABILITY OF ROTATING MHD FLOWS MARTY PH, MARTIN WITKOWSKI L, TROMBETTA P AND TOMASINO situation. The results allow to determine the hydrodynamic stability diagram as a function of the magnetic instabilities can be damped by the use of a RMF. #12;STABILITY OF ROTATING MHD FLOWS 329 2. Mathematical model j

Witkowski, Laurent Martin

420

Lattice dynamics and phase diagram of aluminum at high temperatures  

SciTech Connect

The dispersion of phonons in the fcc, hcp, and bcc phases of aluminum is calculated at ultrahigh pressures by the method of small displacements in a supercell. The stability of the phonon subsystem is studied. The thermodynamic characteristics are calculated in the quasi-harmonic approximation, and a phase diagram of aluminum is plotted. As compared to the Debye model, the use of a phonon spectrum calculated in the quasi-harmonic approximation significantly broadens the hcp phase field and strongly shifts the phase boundary between the fcc and bcc phases. The normal isentrope is calculated at megabar pressures. It is shown to intersect the fcc-hcp and hcp-bcc phase boundaries. The sound velocity along the normal isentrope is calculated. It is shown to have a nonmonotonic character.

Kudasov, Yu. B., E-mail: yu_kudasov@yahoo.com; Surdin, O. M.; Korshunov, A. S.; Pavlov, V. N. [National Research Nuclear University 'MEPhI,', Sarov State Institute of Physics and Technology (Russian Federation)] [National Research Nuclear University 'MEPhI,', Sarov State Institute of Physics and Technology (Russian Federation); Frolova, N. V.; Kuzin, R. S. [Russian Federal Nuclear Center-All-Russian Research Institute of Experimental Physics (Russian Federation)] [Russian Federal Nuclear Center-All-Russian Research Institute of Experimental Physics (Russian Federation)

2013-10-15T23:59:59.000Z

Note: This page contains sample records for the topic "gas flow diagram" 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

Subcritical dynamo bifurcation in the Taylor Green flow  

E-Print Network (OSTI)

We report direct numerical simulations of dynamo generation for flow generated using a Taylor-Green forcing. We find that the bifurcation is subcritical, and show its bifurcation diagram. We connect the associated hysteretic behavior with hydrodynamics changes induced by the action of the Lorentz force. We show the geometry of the dynamo magnetic field and discuss how the dynamo transition can be induced when an external field is applied to the flow.

Yannick Ponty; Jean-Phillipe Laval; Berengere Dubrulle; Franois Daviaud; Jean-Franois Pinton

2007-07-24T23:59:59.000Z

422

Development of a high-performance coal-fired power generating system with pyrolysis gas and char-fired high temperature furnace (HITAF)  

SciTech Connect

A concept for an advanced coal-fired combined-cycle power generating system is currently being developed. The first phase of this three-phase program consists of conducting the necessary research and development to define the system, evaluate the economic and technical feasibility of the concept, and prepare an R D plan to develop the concept further. Foster Wheeler Development Corporation is leading a team ofcompanies involved in this effort. The system proposed to meet these goals is a combined-cycle system where air for a gas turbine is indirectly heated to approximately 1800[degrees]F in furnaces fired with cool-derived fuels and then directly heated in a natural-gas-fired combustor up to about 2400[degrees]F. The system is based on a pyrolyzing process that converts the coal into a low-Btu fuel gas and char. The fuelgas is a relatively clean fuel, and it is fired to heat tube surfaces that are susceptible to corrosion and problems from ash deposition. In particular, the high-temperature air heater tubes, which will need tobe a ceramic material, will be located in a separate furnace or region of a furnace that is exposed to combustion products from the low-Btu fuel gas only. A simplified process flow diagram is shown.

Not Available

1992-11-01T23:59:59.000Z

423

Passive gas separator and accumulator device  

DOE Patents (OSTI)

A separation device employing a gas separation filter and swirler vanes for separating gas from a gas-liquid mixture is provided. The cylindrical filter utilizes the principle that surface tension in the pores of the filter prevents gas bubbles from passing through. As a result, the gas collects in the interior region of the filter and coalesces to form larger bubbles in the center of the device. The device is particularly suited for use in microgravity conditions since the swirlers induce a centrifugal force which causes liquid to move from the inner region of the filter, pass the pores, and flow through the outlet of the device while the entrained gas is trapped by the filter. The device includes a cylindrical gas storage screen which is enclosed by the cylindrical gas separation filter. The screen has pores that are larger than those of the filters. The screen prevents larger bubbles that have been formed from reaching and interfering with the pores of the gas separation filter. The device is initially filled with a gas other than that which is to be separated. This technique results in separation of the gas even before gas bubbles are present in the mixture. Initially filling the device with the dissimilar gas and preventing the gas from escaping before operation can be accomplished by sealing the dissimilar gas in the inner region of the separation device with a ruptured disc which can be ruptured when the device is activated for use. 3 figs.

Choe, H.; Fallas, T.T.

1994-08-02T23:59:59.000Z

424

Natural Gas  

Gasoline and Diesel Fuel Update (EIA)

,366 ,366 95,493 1.08 0 0.00 1 0.03 29,406 0.56 1,206 0.04 20,328 0.64 146,434 0.73 - Natural Gas 1996 Million Percent of Million Percent of Cu. Feet National Total Cu. Feet National Total Net Interstate Movements: Industrial: Marketed Production: Vehicle Fuel: Deliveries to Consumers: Electric Residential: Utilities: Commercial: Total: South Carolina South Carolina 88. Summary Statistics for Natural Gas South Carolina, 1992-1996 Table 1992 1993 1994 1995 1996 Reserves (billion cubic feet) Estimated Proved Reserves (dry) as of December 31 ....................................... 0 0 0 0 0 Number of Gas and Gas Condensate Wells Producing at End of Year.............................. 0 0 0 0 0 Production (million cubic feet) Gross Withdrawals From Gas Wells ......................................... 0 0 0 0 0 From Oil Wells ...........................................

425

Natural Gas  

Gasoline and Diesel Fuel Update (EIA)

0,216 0,216 50,022 0.56 135 0.00 49 1.67 85,533 1.63 8,455 0.31 45,842 1.45 189,901 0.95 - Natural Gas 1996 Million Percent of Million Percent of Cu. Feet National Total Cu. Feet National Total Net Interstate Movements: Industrial: Marketed Production: Vehicle Fuel: Deliveries to Consumers: Electric Residential: Utilities: Commercial: Total: M a r y l a n d Maryland 68. Summary Statistics for Natural Gas Maryland, 1992-1996 Table 1992 1993 1994 1995 1996 Reserves (billion cubic feet) Estimated Proved Reserves (dry) as of December 31 ....................................... NA NA NA NA NA Number of Gas and Gas Condensate Wells Producing at End of Year.............................. 9 7 7 7 8 Production (million cubic feet) Gross Withdrawals From Gas Wells ......................................... 33 28 26 22 135 From Oil Wells ...........................................

426

Natural Gas Transmission and Distribution Module  

Gasoline and Diesel Fuel Update (EIA)

page intentionally left blank page intentionally left blank 129 U.S. Energy Information Administration | Assumptions to the Annual Energy Outlook 2011 Natural Gas Transmission and Distribution Module The NEMS Natural Gas Transmission and Distribution Module (NGTDM) derives domestic natural gas production, wellhead and border prices, end-use prices, and flows of natural gas through the regional interstate network, for both a peak (December through March) and off peak period during each projection year. These are derived by solving for the market equilibrium across the three main components of the natural gas market: the supply component, the demand component, and the transmission and distribution network that links them. Natural gas flow patterns are a function of the pattern in the previous year, coupled

427

Natural Gas Transmission and Distribution Module This  

Gasoline and Diesel Fuel Update (EIA)

This This page inTenTionally lefT blank 127 U.S. Energy Information Administration | Assumptions to the Annual Energy Outlook 2012 Natural Gas Transmission and Distribution Module The NEMS Natural Gas Transmission and Distribution Module (NGTDM) derives domestic natural gas production, wellhead and border prices, end-use prices, and flows of natural gas through a regional interstate representative pipeline network, for both a peak (December through March) and off-peak period during each projection year. These are derived by solving for the market equilibrium across the three main components of the natural gas market: the supply component, the demand component, and the transmission and distribution network that links them. Natural gas flow patterns are a function of the

428

Multiphase flow in fractured porous media  

SciTech Connect

The major goal of this research project was to improve the understanding of the gas-oil two-phase flow in fractured porous media. In addition, miscible displacement was studied to evaluate its promise for enhanced recovery.

Firoozabadi, A.

1995-02-01T23:59:59.000Z

429

Flammable Gas Detection for the D-Zero Gas System  

SciTech Connect

The use of flammable gas and high voltage in detector systems is common in many experiments at Fermilab. To mitigate the hazards associated with these systems, Fermilab Engineering Standard SD-45B (Ref. 1) was adopted. Since this note is meant to be a guide and not a mandatory standard, each experiment is reviewed for compliance with SD-45B by the flammable gas safety subcommittee. Currently, there are only two types of flammable gas in use, ethane (Appendix A) and methane (Appendix B). The worst flammable-gas case is C2H6 (ethane), which has an estimated flow rate that is 73% of the CH4 (methane) flow but a heat of combustion (in kcal/g-mole) that is 173% of that of methane. In the worst case, if ethane were to spew through its restricting orifice into its gas line at 0 psig and then through a catastrophic leak into Room 215 (TRD) or Room 511 (CDC/FDCNTX), the time that would be required to build up a greater than Class 1 inventory (0.4kg H2 equivalent) would be 5.2 hours (Ref. 2). Therefore a worst-case flammable gas leak would have to go undetected for over 5 hours in order to transform a either mixing room to an environment with a Risk Class greater than Class 1. The mixing systems, gas lines, and detectors themselves will be thoroughly leak checked prior to active service. All vessels that are part of the mixing systems will be protected from overpressure by safety valves vented outside the building. Both the input and output of all detector volumes are protected from overpressure in the same way. The volume immediately outside the central tracking detectors is continuously purged by nitrogen from boiloff from the main nitrogen dewar at the site. However, if flammable gas were to build up in the mixing rooms or particular detector areas, no matter how unlikely, flammable gas detectors that are part of the interlock chain of each gas mixing system will shut down the appropriate system. This includes shutting off the output of flammable gas manifolds within the gas shed. Similarly, if a fire were to break out anywhere in the D-ZERO Hall, fire sensors would stop the output of all flammable gas manifolds within the gas shed, by unpowering electrically controlled solenoid valves that are normally closed in the event of a power failure. Fire sensor contacts have not yet been installed.

Spires, L.D.; Foglesong, J.; /Fermilab

1991-02-11T23:59:59.000Z

430

Formation of gasdynamic flow for plates colliding at a sharp angle  

SciTech Connect

The authors experimentally study the dynamics of the accumulation of a bunch of shock compressed gas, formed when a plate is propelled at a substrate by a sliding detonation wave, propagating with a velocity of U/sub 0/ greater than 6 km/sec. The detonation velocity was chosen to exceed the velocity of sound in the plate and substrate materials, which ensured that particles and cumulative jets from the region of the point of contact would not be generated. A diagram of the experiments is shown. The study shows the existence of three states of gasdynamic flow (with stable accumulation of plasma, the stall state, and with no accumulation); the velocity of the direct shock wave formed exceeds the adiabatic velocity and increases as the gap size decreases; and, the strong solution is realized behind the front of the oblique shock wave -- the parameters of the bunch of shock-compressed gas formed are independent of the angle of flight of the propelled plate.

Vasilev, S.M.; Kitko, V.I.

1986-07-01T23:59:59.000Z

431

,"Missouri Natural Gas Summary"  

U.S. Energy Information Administration (EIA) Indexed Site

Gas Wells (MMcf)","Missouri Natural Gas Gross Withdrawals from Oil Wells (MMcf)","Missouri Natural Gas Gross Withdrawals from Shale Gas (Million Cubic Feet)","Missouri Natural...

432

Passive gas separator and accumulator device  

DOE Patents (OSTI)

A separation device employing a gas separation filter and swirler vanes for separating gas from a gasliquid mixture is provided. The cylindrical filter utilizes the principle that surface tension in the pores of the filter prevents gas bubbles from passing through. As a result, the gas collects in the interior region of the filter and coalesces to form larger bubbles in the center of the device. The device is particularly suited for use in microgravity conditions since the swirlers induce a centrifugal force which causes liquid to move from the inner region of the filter, pass the pores, and flow through the outlet of the device while the entrained gas is trapped by the filter. The device includes a cylindrical gas storage screen which is enclosed by the cylindrical gas separation filter. The screen has pores that are larger than those of the filters. The screen prevents larger bubbles that have been formed from reaching and interfering with the pores of the gas separation filter. The device is initially filled with a gas other than that which is to be separated. This technique results in separation of the gas even before gas bubbles are present in the mixture. Initially filling the device with the dissimilar gas and preventing the gas from escaping before operation can be accomplished by sealing the dissimilar gas in the inner region of the separation device with a ruptured disc which can be ruptured when the device is activated for use.

Choe, Hwang (Saratoga, CA); Fallas, Thomas T. (Berkeley, CA)

1994-01-01T23:59:59.000Z

433

Experimental manifestation of vortices and Rossby wave blocking at the MHD excitation of quasi-two-dimensional flows in a rotating cylindrical vessel  

Science Journals Connector (OSTI)

Experiments on the excitation of counterpropagating zonal flows by the magnetohydrodynamic (MHD) method in a rotating cylindrical vessel with ... moving cyclones in the main stream. The diagram of regimes is plot...

A. E. Gledzer; E. B. Gledzer; A. A. Khapaev; O. G. Chkhetiani

2013-05-01T23:59:59.000Z

434

Gas-Surface Energy Exchange in Collisions of Helium Atoms with Aligned Single-Walled Carbon  

E-Print Network (OSTI)

1 Gas-Surface Energy Exchange in Collisions of Helium Atoms with Aligned Single-Walled Carbon #12;2 ABSTRACT Since gas flows in micro/nano devices are dominated by the interaction of gas molecules accommodation of gas molecules on surfaces. The scattering of gas molecules on quartz surfaces covered with VA

Maruyama, Shigeo

435

UZ Flow Models and Submodels  

SciTech Connect

The purpose of this report is to document the unsaturated zone (UZ) flow models and submodels, as well as the flow fields that have been generated using the UZ flow model(s) of Yucca Mountain, Nevada. In this report, the term ''UZ model'' refers to the UZ flow model and the several submodels, which include tracer transport, temperature or ambient geothermal, pneumatic or gas flow, and geochemistry (chloride, calcite, and strontium) submodels. The term UZ flow model refers to the three-dimensional models used for calibration and simulation of UZ flow fields. This work was planned in the ''Technical Work Plan (TWP) for: Unsaturated Zone Flow Analysis and Model Report Integration'' (BSC 2004 [DIRS 169654], Section 1.2.7). The table of included Features, Events, and Processes (FEPs), Table 6.2-11, is different from the list of included FEPs assigned to this report in the ''Technical Work Plan for: Unsaturated Zone Flow Analysis and Model Report Integration'' (BSC 2004 [DIRS 169654], Table 2.1.5-1), as discussed in Section 6.2.6. The UZ model has revised, updated, and enhanced the previous UZ model (BSC 2001 [DIRS 158726]) by incorporating the repository design with new grids, recalibration of property sets, and more comprehensive validation effort. The flow fields describe fracture-fracture, matrix-matrix, and fracture-matrix liquid flow rates, and their spatial distributions as well as moisture conditions in the UZ system. These three-dimensional UZ flow fields are used directly by Total System Performance Assessment (TSPA). The model and submodels evaluate important hydrogeologic processes in the UZ as well as geochemistry and geothermal conditions. These provide the necessary framework to test hypotheses of flow and transport at different scales, and predict flow and transport behavior under a variety of climatic conditions. In addition, the limitations of the UZ model are discussed in Section 8.11.

Y. Wu

2004-11-01T23:59:59.000Z

436

Natural gas pipeline technology overview.  

SciTech Connect

The United States relies on natural gas for one-quarter of its energy needs. In 2001 alone, the nation consumed 21.5 trillion cubic feet of natural gas. A large portion of natural gas pipeline capacity within the United States is directed from major production areas in Texas and Louisiana, Wyoming, and other states to markets in the western, eastern, and midwestern regions of the country. In the past 10 years, increasing levels of gas from Canada have also been brought into these markets (EIA 2007). The United States has several major natural gas production basins and an extensive natural gas pipeline network, with almost 95% of U.S. natural gas imports coming from Canada. At present, the gas pipeline infrastructure is more developed between Canada and the United States than between Mexico and the United States. Gas flows from Canada to the United States through several major pipelines feeding U.S. markets in the Midwest, Northeast, Pacific Northwest, and California. Some key examples are the Alliance Pipeline, the Northern Border Pipeline, the Maritimes & Northeast Pipeline, the TransCanada Pipeline System, and Westcoast Energy pipelines. Major connections join Texas and northeastern Mexico, with additional connections to Arizona and between California and Baja California, Mexico (INGAA 2007). Of the natural gas consumed in the United States, 85% is produced domestically. Figure 1.1-1 shows the complex North American natural gas network. The pipeline transmission system--the 'interstate highway' for natural gas--consists of 180,000 miles of high-strength steel pipe varying in diameter, normally between 30 and 36 inches in diameter. The primary function of the transmission pipeline company is to move huge amounts of natural gas thousands of miles from producing regions to local natural gas utility delivery points. These delivery points, called 'city gate stations', are usually owned by distribution companies, although some are owned by transmission companies. Compressor stations at required distances boost the pressure that is lost through friction as the gas moves through the steel pipes (EPA 2000). The natural gas system is generally described in terms of production, processing and purification, transmission and storage, and distribution (NaturalGas.org 2004b). Figure 1.1-2 shows a schematic of the system through transmission. This report focuses on the transmission pipeline, compressor stations, and city gates.

Folga, S. M.; Decision and Information Sciences

2007-11-01T23:59:59.000Z

437

The National Energy Modeling System: An Overview 2000 - Natural Gas  

Gasoline and Diesel Fuel Update (EIA)

natural gas transmission and distribution module (NGTDM) of NEMS represents the natural gas market and determines regional market-clearing prices for natural gas supplies and for end-use consumption, given the information passed from other NEMS modules. A transmission and distribution network (Figure 15), composed of nodes and arcs, is used to simulate the interregional flow and pricing of gas in the contiguous United States and Canada in both the peak (December through March) and offpeak (April through November) period. This network is a simplified representation of the physical natural gas pipeline system and establishes the possible interregional flows and associated prices as gas moves from supply sources to end users. natural gas transmission and distribution module (NGTDM) of NEMS represents the natural gas market and determines regional market-clearing prices for natural gas supplies and for end-use consumption, given the information passed from other NEMS modules. A transmission and distribution network (Figure 15), composed of nodes and arcs, is used to simulate the interregional flow and pricing of gas in the contiguous United States and Canada in both the peak (December through March) and offpeak (April through November) period. This network is a simplified representation of the physical natural gas pipeline system and establishes the possible interregional flows and associated prices as gas moves from supply sources to end users. Figure 15. Natural Gas Transmission and Distribution Module Network

438

Natural Gas  

Gasoline and Diesel Fuel Update (EIA)

68,747 68,747 34,577 0.39 0 0.00 34 1.16 14,941 0.29 0 0.00 11,506 0.36 61,058 0.31 I d a h o Idaho 60. Summary Statistics for Natural Gas Idaho, 1992-1996 Table 1992 1993 1994 1995 1996 Reserves (billion cubic feet) Estimated Proved Reserves (dry) as of December 31 ....................................... 0 0 0 0 0 Number of Gas and Gas Condensate Wells Producing at End of Year.............................. 0 0 0 0 0 Production (million cubic feet) Gross Withdrawals From Gas Wells ......................................... 0 0 0 0 0 From Oil Wells ........................................... 0 0 0 0 0 Total.............................................................. 0 0 0 0 0 Repressuring ................................................ 0 0 0 0 0 Nonhydrocarbon Gases Removed ............... 0 0 0 0 0 Wet After Lease Separation.......................... 0 0 0 0 0 Vented

439

Natural Gas  

Gasoline and Diesel Fuel Update (EIA)

0 0 0 0.00 0 0.00 0 0.00 540 0.01 0 0.00 2,132 0.07 2,672 0.01 H a w a i i Hawaii 59. Summary Statistics for Natural Gas Hawaii, 1992-1996 Table 1992 1993 1994 1995 1996 Reserves (billion cubic feet) Estimated Proved Reserves (dry) as of December 31 ....................................... 0 0 0 0 0 Number of Gas and Gas Condensate Wells Producing at End of Year.............................. 0 0 0 0 0 Production (million cubic feet) Gross Withdrawals From Gas Wells ......................................... 0 0 0 0 0 From Oil Wells ........................................... 0 0 0 0 0 Total.............................................................. 0 0 0 0 0 Repressuring ................................................ 0 0 0 0 0 Nonhydrocarbon Gases Removed ............... 0 0 0 0 0 Wet After Lease Separation.......................... 0 0 0 0 0 Vented and Flared

440

Natural Gas  

Gasoline and Diesel Fuel Update (EIA)

483,052 483,052 136,722 1.54 6,006 0.03 88 3.00 16,293 0.31 283,557 10.38 41,810 1.32 478,471 2.39 F l o r i d a Florida 57. Summary Statistics for Natural Gas Florida, 1992-1996 Table 1992 1993 1994 1995 1996 Reserves (billion cubic feet) Estimated Proved Reserves (dry) as of December 31 ....................................... 47 50 98 92 96 Number of Gas and Gas Condensate Wells Producing at End of Year.............................. 0 0 0 0 0 Production (million cubic feet) Gross Withdrawals From Gas Wells ......................................... 0 0 0 0 0 From Oil Wells ........................................... 7,584 8,011 8,468 7,133 6,706 Total.............................................................. 7,584 8,011 8,468 7,133 6,706 Repressuring ................................................ 0 0 0 0 0 Nonhydrocarbon Gases Removed ...............

Note: This page contains sample records for the topic "gas flow diagram" 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

Natural Gas  

Gasoline and Diesel Fuel Update (EIA)

291,898 291,898 113,995 1.29 0 0.00 4 0.14 88,078 1.68 3,491 0.13 54,571 1.73 260,140 1.30 I o w a Iowa 63. Summary Statistics for Natural Gas Iowa, 1992-1996 Table 1992 1993 1994 1995 1996 Reserves (billion cubic feet) Estimated Proved Reserves (dry) as of December 31 ....................................... 0 0 0 0 0 Number of Gas and Gas Condensate Wells Producing at End of Year.............................. 0 0 0 0 0 Production (million cubic feet) Gross Withdrawals From Gas Wells ......................................... 0 0 0 0 0 From Oil Wells ........................................... 0 0 0 0 0 Total.............................................................. 0 0 0 0 0 Repressuring ................................................ 0 0 0 0 0 Nonhydrocarbon Gases Removed ............... 0 0 0 0 0 Wet After Lease Separation.......................... 0 0 0

442

Natural Gas  

Gasoline and Diesel Fuel Update (EIA)

Vehicle Fuel: Vehicle Fuel: Deliveries to Consumers: Electric Residential: Utilities: Commercial: Total: New England New England 36. Summary Statistics for Natural Gas New England, 1992-1996 Table 691,089 167,354 1.89 0 0.00 40 1.36 187,469 3.58 80,592 2.95 160,761 5.09 596,215 2.98 1992 1993 1994 1995 1996 Reserves (billion cubic feet) Estimated Proved Reserves (dry) as of December 31 ....................................... 0 0 0 0 0 Number of Gas and Gas Condensate Wells Producing at End of Year.............................. 0 0 0 0 0 Production (million cubic feet) Gross Withdrawals From Gas Wells ......................................... 0 0 0 0 0 From Oil Wells ........................................... 0 0 0 0 0 Total.............................................................. 0 0 0 0 0 Repressuring ................................................

443

Natural Gas  

Gasoline and Diesel Fuel Update (EIA)

29,693 29,693 0 0.00 0 0.00 6 0.20 17,290 0.33 0 0.00 16,347 0.52 33,644 0.17 District of Columbia District of Columbia 56. Summary Statistics for Natural Gas District of Columbia, 1992-1996 Table 1992 1993 1994 1995 1996 Reserves (billion cubic feet) Estimated Proved Reserves (dry) as of December 31 ....................................... 0 0 0 0 0 Number of Gas and Gas Condensate Wells Producing at End of Year.............................. 0 0 0 0 0 Production (million cubic feet) Gross Withdrawals From Gas Wells ......................................... 0 0 0 0 0 From Oil Wells ........................................... 0 0 0 0 0 Total.............................................................. 0 0 0 0 0 Repressuring ................................................ 0 0 0 0 0 Nonhydrocarbon Gases Removed ............... 0 0 0 0 0 Wet After Lease Separation..........................

444

Natural Gas  

Gasoline and Diesel Fuel Update (EIA)

42,980 42,980 14,164 0.16 0 0.00 1 0.03 9,791 0.19 23,370 0.86 6,694 0.21 54,020 0.27 D e l a w a r e Delaware 55. Summary Statistics for Natural Gas Delaware, 1992-1996 Table 1992 1993 1994 1995 1996 Reserves (billion cubic feet) Estimated Proved Reserves (dry) as of December 31 ....................................... 0 0 0 0 0 Number of Gas and Gas Condensate Wells Producing at End of Year.............................. 0 0 0 0 0 Production (million cubic feet) Gross Withdrawals From Gas Wells ......................................... 0 0 0 0 0 From Oil Wells ........................................... 0 0 0 0 0 Total.............................................................. 0 0 0 0 0 Repressuring ................................................ 0 0 0 0 0 Nonhydrocarbon Gases Removed ............... 0 0 0 0 0 Wet After Lease Separation..........................

445

Natural Gas  

Gasoline and Diesel Fuel Update (EIA)

-49,536 -49,536 7,911 0.09 49,674 0.25 15 0.51 12,591 0.24 3 0.00 12,150 0.38 32,670 0.16 North Dakota North Dakota 82. Summary Statistics for Natural Gas North Dakota, 1992-1996 Table 1992 1993 1994 1995 1996 Reserves (billion cubic feet) Estimated Proved Reserves (dry) as of December 31 ....................................... 496 525 507 463 462 Number of Gas and Gas Condensate Wells Producing at End of Year.............................. 104 101 104 99 108 Production (million cubic feet) Gross Withdrawals From Gas Wells ......................................... 12,461 18,892 19,592 16,914 16,810 From Oil Wells ........................................... 47,518 46,059 43,640 39,760 38,906 Total.............................................................. 59,979 64,951 63,232 56,674 55,716 Repressuring ................................................

446

Natural Gas  

Gasoline and Diesel Fuel Update (EIA)

21,547 21,547 4,916 0.06 0 0.00 0 0.00 7,012 0.13 3 0.00 7,099 0.22 19,031 0.10 N e w H a m p s h i r e New Hampshire 77. Summary Statistics for Natural Gas New Hampshire, 1992-1996 Table 1992 1993 1994 1995 1996 Reserves (billion cubic feet) Estimated Proved Reserves (dry) as of December 31 ....................................... 0 0 0 0 0 Number of Gas and Gas Condensate Wells Producing at End of Year.............................. 0 0 0 0 0 Production (million cubic feet) Gross Withdrawals From Gas Wells ......................................... 0 0 0 0 0 From Oil Wells ........................................... 0 0 0 0 0 Total.............................................................. 0 0 0 0 0 Repressuring ................................................ 0 0 0 0 0 Nonhydrocarbon Gases Removed ............... 0 0 0 0 0 Wet After Lease Separation..........................

447

Natural Gas  

Gasoline and Diesel Fuel Update (EIA)

139,881 139,881 26,979 0.30 463 0.00 115 3.92 27,709 0.53 19,248 0.70 28,987 0.92 103,037 0.52 A r i z o n a Arizona 50. Summary Statistics for Natural Gas Arizona, 1992-1996 Table 1992 1993 1994 1995 1996 Reserves (billion cubic feet) Estimated Proved Reserves (dry) as of December 31 ....................................... NA NA NA NA NA Number of Gas and Gas Condensate Wells Producing at End of Year.............................. 6 6 6 7 7 Production (million cubic feet) Gross Withdrawals From Gas Wells ......................................... 721 508 711 470 417 From Oil Wells ........................................... 72 110 48 88 47 Total.............................................................. 794 618 759 558 464 Repressuring ................................................ 0 0 0 0 0 Nonhydrocarbon Gases Removed ............... 0 0 0 0 0 Wet After Lease

448

Natural Gas  

Gasoline and Diesel Fuel Update (EIA)

Middle Middle Atlantic Middle Atlantic 37. Summary Statistics for Natural Gas Middle Atlantic, 1992-1996 Table 1992 1993 1994 1995 1996 Reserves (billion cubic feet) Estimated Proved Reserves (dry) as of December 31 ....................................... 1,857 1,981 2,042 1,679 1,928 Number of Gas and Gas Condensate Wells Producing at End of Year.............................. 36,906 36,857 26,180 37,159 38,000 Production (million cubic feet) Gross Withdrawals From Gas Wells ......................................... 161,372 152,717 140,444 128,677 152,494 From Oil Wells ........................................... 824 610 539 723 641 Total.............................................................. 162,196 153,327 140,982 129,400 153,134 Repressuring ................................................ 0 0 0 0 0 Nonhydrocarbon Gases Removed

449

Natural Gas  

Gasoline and Diesel Fuel Update (EIA)

386,690 386,690 102,471 1.16 0 0.00 43 1.47 142,319 2.72 5,301 0.19 98,537 3.12 348,671 1.74 M i n n e s o t a Minnesota 71. Summary Statistics for Natural Gas Minnesota, 1992-1996 Table 1992 1993 1994 1995 1996 Reserves (billion cubic feet) Estimated Proved Reserves (dry) as of December 31 ....................................... 0 0 0 0 0 Number of Gas and Gas Condensate Wells Producing at End of Year.............................. 0 0 0 0 0 Production (million cubic feet) Gross Withdrawals From Gas Wells ......................................... 0 0 0 0 0 From Oil Wells ........................................... 0 0 0 0 0 Total.............................................................. 0 0 0 0 0 Repressuring ................................................ 0 0 0 0 0 Nonhydrocarbon Gases Removed ............... 0 0 0 0 0 Wet After Lease Separation..........................

450

Natural Gas  

Gasoline and Diesel Fuel Update (EIA)

1,108,583 1,108,583 322,275 3.63 298 0.00 32 1.09 538,749 10.28 25,863 0.95 218,054 6.90 1,104,972 5.52 I l l i n o i s Illinois 61. Summary Statistics for Natural Gas Illinois, 1992-1996 Table 1992 1993 1994 1995 1996 Reserves (billion cubic feet) Estimated Proved Reserves (dry) as of December 31 ....................................... NA NA NA NA NA Number of Gas and Gas Condensate Wells Producing at End of Year.............................. 382 385 390 372 370 Production (million cubic feet) Gross Withdrawals From Gas Wells ......................................... 337 330 323 325 289 From Oil Wells ........................................... 10 10 10 10 9 Total.............................................................. 347 340 333 335 298 Repressuring ................................................ 0 0 0 0 0 Nonhydrocarbon Gases Removed ...............

451

Natural Gas  

Gasoline and Diesel Fuel Update (EIA)

286,485 286,485 71,533 0.81 25 0.00 31 1.06 137,225 2.62 5,223 0.19 72,802 2.31 286,814 1.43 M i s s o u r i Missouri 73. Summary Statistics for Natural Gas Missouri, 1992-1996 Table 1992 1993 1994 1995 1996 Reserves (billion cubic feet) Estimated Proved Reserves (dry) as of December 31 ....................................... NA NA NA NA NA Number of Gas and Gas Condensate Wells Producing at End of Year.............................. 5 8 12 15 24 Production (million cubic feet) Gross Withdrawals From Gas Wells ......................................... 27 14 8 16 25 From Oil Wells ........................................... 0 0 0 0 0 Total.............................................................. 27 14 8 16 25 Repressuring ................................................ 0 0 0 0 0 Nonhydrocarbon Gases Removed ............... 0 0 0 0 0 Wet After Lease Separation..........................

452

Natural Gas  

Gasoline and Diesel Fuel Update (EIA)

411,951 411,951 100,015 1.13 0 0.00 5 0.17 114,365 2.18 45,037 1.65 96,187 3.05 355,609 1.78 Massachusetts Massachusetts 69. Summary Statistics for Natural Gas Massachusetts, 1992-1996 Table 1992 1993 1994 1995 1996 Reserves (billion cubic feet) Estimated Proved Reserves (dry) as of December 31 ....................................... 0 0 0 0 0 Number of Gas and Gas Condensate Wells Producing at End of Year.............................. 0 0 0 0 0 Production (million cubic feet) Gross Withdrawals From Gas Wells ......................................... 0 0 0 0 0 From Oil Wells ........................................... 0 0 0 0 0 Total.............................................................. 0 0 0 0 0 Repressuring ................................................ 0 0 0 0 0 Nonhydrocarbon Gases Removed ............... 0 0 0 0 0 Wet After Lease Separation..........................

453

Gas vesicles.  

Science Journals Connector (OSTI)

...in the suspending water, of concentration...MPa and balances the atmospheric pressure. Note that...versely, liquid water could not form by condensation inside the gas vesicle...presumably surrounded by water on all sides. At...

A E Walsby

1994-03-01T23:59:59.000Z

454

Natural Gas  

Gasoline and Diesel Fuel Update (EIA)

226,798 226,798 104,124 1.17 0 0.00 0 0.00 58,812 1.12 2,381 0.09 40,467 1.28 205,783 1.03 North Carolina North Carolina 81. Summary Statistics for Natural Gas North Carolina, 1992-1996 Table 1992 1993 1994 1995 1996 Reserves (billion cubic feet) Estimated Proved Reserves (dry) as of December 31 ....................................... 0 0 0 0 0 Number of Gas and Gas Condensate Wells Producing at End of Year.............................. 0 0 0 0 0 Production (million cubic feet) Gross Withdrawals From Gas Wells ......................................... 0 0 0 0 0 From Oil Wells ........................................... 0 0 0 0 0 Total.............................................................. 0 0 0 0 0 Repressuring ................................................ 0 0 0 0 0 Nonhydrocarbon Gases Removed ............... 0 0 0 0 0 Wet After Lease Separation..........................

455

Exchange-correlation energy and the phase diagram of Si D. Alfe`1,2  

E-Print Network (OSTI)

Exchange-correlation energy and the phase diagram of Si D. Alfe`1,2 and M. J. Gillan2 1 Earth exchange-correlation energy, underpredict the melting temperature by 20 %. We present new first number s : 64.70.Dv, 81.30.Dz, 71.15.Pd The long-standing ambition of calculating phase diagrams from

Alfè, Dario

456

The Purification of Water by Zone Melting: A Phase Diagram Interpretation  

Science Journals Connector (OSTI)

The Purification of Water by Zone Melting: A Phase Diagram Interpretation ... The author comments on the application of zone melting to the purification of water from aqueous NaCl solutions by giving an interpretation of some results taking into account the binary phase diagram. ... Water / Water Chemistry ...

Mohamed Jemal

2004-07-01T23:59:59.000Z

457

The Complexity of Geodesic Voronoi Diagrams on Triangulated 2-Manifold Surfaces  

E-Print Network (OSTI)

The Complexity of Geodesic Voronoi Diagrams on Triangulated 2-Manifold Surfaces Yong-Jin Liu1 , Kai 2-manifold surface, based on the geodesic metric. Given a triangulated 2-manifold T of n faces T, the Voronoi diagram of a set of point sites based on the geodesic metric (called below geodesic

Tang, Kai

458

Page 1 of 19 Title: Dispersion diagrams of waves in the simulated solar chromosphere  

E-Print Network (OSTI)

Page 1 of 19 Title: Dispersion diagrams of waves in the simulated solar chromosphere Authors and affiliations: Dove, C., Zita, E.J., Bogdan, T.J., 1) Introduction: What role do MHD waves play in the dynamics. And the only way to absolutely test theory is by observation. By generating dispersion diagrams from simulation

Zita, E.J.

459

Ensuring the Drawability of Extended Euler Diagrams for up to 8 Sets  

E-Print Network (OSTI)

(left) and Extended Euler Diagram (right) built from the fields (A)"Paris", (B)"works", (C)"subway", (D of transportation in Paris. Figure 1 shows two diagrams built from the fields Paris, works, subway and beltway 3 million documents representing approximately 400 000 hours of video and 500 000 hours of audio

Verroust-Blondet, Anne

460

Chemoresistive gas sensor  

DOE Patents (OSTI)

A chemoresistive gas sensor is provided which has improved sensitivity. A layer of organic semiconductor is disposed between two electrodes which, in turn, are connected to a voltage source. High conductivity material is dispersed within the layer of organic semiconductor in the form of very small particles, or islands. The average interisland spacing is selected so that the predominant mode of current flow is by way of electron funneling. Adsorption of gaseous contaminant onto the layer of organic semiconductor modulates the tunneling current in a quantitative manner. 2 figs.

Hirschfeld, T.B.

1987-06-23T23:59:59.000Z

Note: This page contains sample records for the topic "gas flow diagram" 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

Flow chamber  

DOE Patents (OSTI)

A flow chamber having a vacuum chamber and a specimen chamber. The specimen chamber may have an opening through which a fluid may be introduced and an opening through which the fluid may exit. The vacuum chamber may have an opening through which contents of the vacuum chamber may be evacuated. A portion of the flow chamber may be flexible, and a vacuum may be used to hold the components of the flow chamber together.

Morozov, Victor (Manassas, VA)

2011-01-18T23:59:59.000Z

462

Application of failure assessment diagrams to proof test analysis  

SciTech Connect

Failure Assessment Diagrams (FADs) are constructed which are applicable to a proof test analysis. The FADs are based on failure curves derived from published elastic-plastic J solutions for a wide range of structural features (e.g., structural geometries, crack shapes and sizes, and applied loads) and strain hardening rates. It is shown how failure curves can be constructed which are relatively how failure curves can be constructed which are relatively insensitive to detailed structural features. These are utilized in the construction of failure curves for use in determining the maximum construction of failure curves for use in determining the maximum flaw sizes that could just survive a proof test overload, and the critical crack size under service conditions. The application of the derived failure curves to determining the flaw screening capability conferred by proof testing is discussed. The concepts behind the developed failure curves are being incorporated into a ``state-of-the-art`` proof test guidelines handbook being developed for NASA.

Chell, G.G.; McClung, R.C. [Southwest Research Institute, San Antonio, TX (United States); Russell, D.A. [Rockwell International Corp., Canoga Park, CA (United States). Rocketdyne Division

1995-11-01T23:59:59.000Z

463

Oak Ridge National Laboratory Technology Logic Diagram. Indexes  

SciTech Connect

The Decontamination and Decommissioning (D&D) Index provides a comprehensive list of site problems, problem area/constituents, remedial technologies, and regulatory terms discussed in the D&D sections of the Oak Ridge National Laboratory Technology Logic Diagram. All entries provide specific page numbers, or cross-reference entries that provide specific page numbers, in the D&D volumes (Vol. 1, Pt. A; Vol. 2, Pt. A; and appropriate parts of Vol. 3). The Oak Ridge National Laboratory Technology (TLD) was developed to provide a decision-support tool that relates environmental restoration (ER) and waste management (WM) problems at Oak Ridge National Laboratory (ORNL) to potential technologies that can remediate these problems. The TLD identifies the research, development, demonstration, testing, and evaluation needed to develop these technologies to a state that allows technology transfer and application to decontamination and decommissioning (D&D), remedial action (RA) and WM activities. It is essential that follow-on engineering studies be conducted to build on the output of this project. These studies will begin by selecting the most promising technologies identified in the TLD and finding an optimum mix of technologies that will provide a socially acceptable balance between cost and risk.

Not Available

1993-09-01T23:59:59.000Z

464

The AGN Hubble Diagram and Its Implications for Cosmology  

E-Print Network (OSTI)

We use a recently proposed luminosity distance measure for relatively nearby active galactic nuclei (AGNs) to test the predicted expansion of the Universe in the R_h=ct and LCDM cosmologies. This comparative study is particularly relevant to the question of whether or not the Universe underwent a transition from decelerated to accelerated expansion, which is believed to have occurred---on the basis of Type Ia SN studies---within the redshift range (0 < z < 1.3) that will eventually be sampled by these objects. We find that the AGN Hubble Diagram constructed from currently available sources does not support the existence of such a transition. While the scatter in the AGN data is still too large for any firm conclusions to be drawn, the results reported here nonetheless confirm and strengthen similar results of comparative analyses using other types of source, such as cosmic chronometers and gamma ray bursts. We show that the Akaike, Kullback, and Bayes Information Criteria all consistently yield a likelihood of ~74-93% that R_h=ct is closer to the "true" cosmology than LCDM is.

Fulvio Melia

2014-09-27T23:59:59.000Z

465

The AGN Hubble Diagram and Its Implications for Cosmology  

E-Print Network (OSTI)

We use a recently proposed luminosity distance measure for relatively nearby active galactic nuclei (AGNs) to test the predicted expansion of the Universe in the R_h=ct and LCDM cosmologies. This comparative study is particularly relevant to the question of whether or not the Universe underwent a transition from decelerated to accelerated expansion, which is believed to have occurred---on the basis of Type Ia SN studies---within the redshift range (0 < z < 1.3) that will eventually be sampled by these objects. We find that the AGN Hubble Diagram constructed from currently available sources does not support the existence of such a transition. While the scatter in the AGN data is still too large for any firm conclusions to be drawn, the results reported here nonetheless confirm and strengthen similar results of comparative analyses using other types of source, such as cosmic chronometers and gamma ray bursts. We show that the Akaike, Kullback, and Bayes Information Criteria all consistently yield a likeli...

Melia, Fulvio

2014-01-01T23:59:59.000Z

466

A semi-automated approach to adapt activity diagrams for new use cases  

Science Journals Connector (OSTI)

AbstractContext Web engineering methodologies generally assign a crucial role to design models. Therefore, providing a model reuse approach is very interesting since it reduces development costs and improves quality. Current works on model reuse mainly focus on retrieval of the promising reusable assets, and much less is done regarding adaptation of the retrieved assets. This research proposes a semi-automatic approach for adaptation of UML activity diagrams to new use cases. Objective UML use case diagrams and activity diagrams are traditionally used for the brief and the detailed specification of the functional requirements. Since many web applications have similar functionalities, and hence similar functional requirements, this research proposes an approach to take a use case diagram as input and semi-automatically create corresponding activity diagrams by adapting existing activity diagrams. Method The proposed approach includes five main components: (1) a model repository, (2) an ontology repository as a source of domain knowledge, (3) an algorithm for annotating activity diagrams, (4) a similarity metric for retrieval of similar use cases, and (5) an adaptation algorithm for creating activity diagram of a new use case from an existing activity diagram The proposed approach uses the semantic web data model as the underlying representation format. Results The initial experiments show that the proposed approach is promising and it provides an average reuse percent of 76%. However, it has still some weaknesses like being much dependent on the quality of the model repository and having low tolerance in case of inconsistency in the model repository. Conclusion Enabling model reuse in the early stages of a model based development approach is very important in reducing development costs. This paper proposes a semi-automatic approach to reuse activity diagrams through their adaptation for new use cases. The approach is demonstrated to be promising although it has still some limitations.

Samad Paydar; Mohsen Kahani

2015-01-01T23:59:59.000Z

467

2-D numerical simulation of digital rock experiments with lattice gas automation for electrical properties of reservoir formation  

Science Journals Connector (OSTI)

......41074103 from National Natural Science Foundation...law from lattice-gas hydrodynamics, Phys...equation using a lattice gas Boltzmann method...1991b. Lattice gas automata for flow...Logging Analysist, Corpus Christi, TX, 1982 July......

Wenzheng Yue; Guo Tao; Shangxu Wang; Bin Tian

2010-12-01T23:59:59.000Z

468

Method and system for measuring multiphase flow using multiple pressure differentials  

DOE Patents (OSTI)

An improved method and system for measuring a multiphase flow in a pressure flow meter. An extended throat venturi is used and pressure of the multiphase flow is measured at three or more positions in the venturi, which define two or more pressure differentials in the flow conduit. The differential pressures are then used to calculate the mass flow of the gas phase, the total mass flow, and the liquid phase. The method for determining the mass flow of the high void fraction fluid flow and the gas flow includes certain steps. The first step is calculating a gas density for the gas flow. The next two steps are finding a normalized gas mass flow rate through the venturi and computing a gas mass flow rate. The following step is estimating the gas velocity in the venturi tube throat. The next step is calculating the pressure drop experienced by the gas-phase due to work performed by the gas phase in accelerating the liquid phase between the upstream pressure measuring point and the pressure measuring point in the venturi throat. Another step is estimating the liquid velocity in the venturi throat using the calculated pressure drop experienced by the gas-phase due to work performed by the gas phase. Then the friction is computed between the liquid phase and a wall in the venturi tube. Finally, the total mass flow rate based on measured pressure in the venturi throat is calculated, and the mass flow rate of the liquid phase is calculated from the difference of the total mass flow rate and the gas mass flow rate.

Fincke, James R. (Idaho Falls, ID)

2001-01-01T23:59:59.000Z

469

An investigation into flow regimes for two-phase helium flow  

SciTech Connect

The Tevatron accelerator at Fermilab incorporates long two-phase helium passages. During magnet design, the generalized flow map of Baker was used to predict homogeneous flow. Longer than expected magnet time constants led to this investigation. The importance of predicting the flow regime has been amplified with the advent of non-horizontal accelerator designs. A test setup was constructed at Fermilab to investigate two-phase helium flow regimes for conditions practical in accelerator designs. The setup consisted of a standard Tevatron satellite refrigerator, subcooling dewar, heater, 35 m long transfer line, and a specialized end box. A knife blade on the midplane of the transfer line diverted the flow from the upper and lower halves of the pipe to separate vessels in the end box. The amount of liquid above and below the plane was measured at various total mass flow rates and liquid percentages. The results show that stratified flow occurs at much higher liquid percentages than predicted by the Baker diagram (several orders of magnitude). We were not able to produce high enough steady state flows to find a boundary to a homogenous flow regime. Stratified flow occurred over all practical conditions for long accelerator magnet systems.

Theilacker, J.C.; Rode, C.H.

1987-10-01T23:59:59.000Z

470

Quantitative supersonic flow visualization by hydraulic analogy  

E-Print Network (OSTI)

The hydraulic analogy, which forms the basis for the phics. current investigation, can be used to study supersonic gas flows with great ease by means of a water table. As a result of the analogy, water heights in free surface water flow correspond...

Rani, Sarma Laxminarasimha

2012-06-07T23:59:59.000Z

471

Simulating Microstructural Evolution and Electrical Transport in Ceramic Gas Sensors  

E-Print Network (OSTI)

. In this paper, using the example of the thermal processing of ceramic gas sensors, an integrated compu- tationalSimulating Microstructural Evolution and Electrical Transport in Ceramic Gas Sensors Yunzhi Wang in ceramic gas sensors has been proposed. First, the particle-flow model and the continuum-phase-field method

Ciobanu, Cristian

472

Flow optimization in diving helmets  

SciTech Connect

Improved carbon dioxide transport from the annular space between the head and helmet is necessary to reduce fresh gas flow and associated noise. This paper gives an overview of new techniques for investigating this transport, and for optimizing helmet flow to remove CO{sub 2}. An analytical model predicts inhaled carbon dioxide fraction in terms of helmet and respiration characteristics. Fundamental behavior over a wide range of helmet parameters is computed. An experimental model uses Reynolds scaling with water and dye to simulate fresh gas and carbon dioxide respectively. The water/dye model supports measurement of inhaled dye concentration, and flow visualization. Detailed behavior is investigated for one helmet with air/CO{sub 2} and water/dye experiments. Results support validity of the analytic and water models, provide new insight to CO{sub 2} transport mechanisms, and suggest directions for optimizing helmet design.

Camperman, J.M. [Naval Surface Warfare Center, Panama City, FL (United States). Coastal Systems Station; Tennant, J.S. [Florida Atlantic Univ., Boca Raton, FL (United States). Ocean Engineering Dept.

1996-09-01T23:59:59.000Z

473

X-ray computed-tomography observations of water flow through anisotropic methane hydrate-bearing sand  

E-Print Network (OSTI)

conductivity of gas hydrate-bearing sand. J. Geophys. Res.the water and gas flow through hydrate-bearing sands.The gas from hydrate dissociation in the fine sand appears

Seol, Yongkoo

2010-01-01T23:59:59.000Z

474

Ground Gas Handbook  

Science Journals Connector (OSTI)

...pathways of least resistance to gas transport, and applications are discussed, such as migrating landfill gas emissions, also from leaking landfill gas collection systems, as well as natural gas and oil-field gas leakage from abandoned production...

Allen W Hatheway

475

Establishing the LaMnO3 Surface Phase Diagram in an Oxygen Environment: An ab Initio Kinetic Monte Carlo Simulation Study  

Science Journals Connector (OSTI)

Following the Sabatier principle, we note that phase boundaries on the surface phase diagrams are expected to correlate well with the high catalytic activity regimes on the pressure and temperature scales. ... The excess oxygen molecules not chemisorbed on the surface were washed out by helium fed to the reactor at a 50 cm3 min1 flow rate. ... After comparing the activities of the LSCF catalysts for the catalytic combustion of toluene, it was found that the substitution by little amts. of Sr and Fe improved the activity of LaCoO3. ...

G. Pilania; P.-X. Gao; R. Ramprasad

2012-12-01T23:59:59.000Z

476

Effect of a co?flowing annular outer flow on the flow and acoustics in a porous tube.  

Science Journals Connector (OSTI)

One of the most important aspects of flow in a gas turbine combustor is the cooling airflow introduced through the combustor liner. The co?flowing annular cooling air affects the flow and the acoustic field of the main combustor. A generic study is in progress to study the effect of a co?flowing annular outer flow on the flow and acoustics in a porous tube. This work is an idealization of the actual gas turbine combustor flow. The results generated here will be used to validate the computational codes currently being used by the gas turbine industry to calculate these flow fields. In the present experimental work a 6?in.?diam tube made out of perforated sheet is located coaxially in an 8?in.?diam outer tube. Airflows in the inner perforated tube as well as in the annular space between the two tubes. Detailed measurements of the turbulence structure using hot wire anemometry and of the acoustic field using microphonetransducers are being made. Effects of parameters such as porosity of the tube relative areas of annular space and cross section of inner tube and flow Reynolds number on the turbulence quantities and the acoustic field will be reported.

Sundar Ramamoorthy; Fariborz Khodabakhsh; Sastry Munukutla

1992-01-01T23:59:59.000Z

477

Gas Delivered  

Gasoline and Diesel Fuel Update (EIA)

. Average . Average Price of Natural Gas Delivered to Residential Consumers, 1980-1996 Figure 1980 1982 1984 1986 1988 1990 1992 1994 1996 0 2 4 6 8 10 0 40 80 120 160 200 240 280 320 Dollars per Thousand Cubic Feet Dollars per Thousand Cubic Meters Nominal Dollars Constant Dollars Sources: Nominal dollars: Energy Information Administration (EIA), Form EIA-176, "Annual Report of Natural and Supplemental Gas Supply and Disposition." Constant dollars: Prices were converted to 1995 dollars using the chain-type price indexes for Gross Domestic Product (1992 = 1.0) as published by the U. S. Department of Commerce, Bureau of Economic Analysis. Residential: Prices in this publication for the residential sector cover nearly all of the volumes of gas delivered. Commercial and Industrial: Prices for the commercial and industrial sectors are often associated with

478

Program solves for gas well inflow performance  

SciTech Connect

A Windows-based program, GasIPR, can solve for the gas well inflow performance relationship (IPR). The program calculates gas producing rates at various pressures and is applicable for both turbulent and non-turbulent flow. It also has the following capabilities: computes PVT properties {gamma}{sub g}, P{sub c}, T{sub c}, heating value, Z, {mu}{sub g}, B{sub g}, and {rho}{sub g} from input gas composition data; calculates the Reynolds number (N{sub Re}) and shows the gas flow rates at the sandface at which the turbulence effect must be considered; helps the user to optimize the net perforation interval (h{sub p}) so that the turbulence effect can be minimized; and helps the user to evaluate the sensitivity of formation permeability on gas flow rate for a new play. IPR is a critical component in forecasting gas well deliverability. IPRs are used for sizing optimum tubing configurations and compressors, designing gravel packs, and solving gas well loading problems. IPR is the key reference for nodal analysis.

Engineer, R. [AERA Energy LLC, Bakersfield, CA (United States); Grillete, G. [Bechtel Petroleum Operations Inc., Tupman, CA (United States)

1997-10-20T23:59:59.000Z

479

Connecting the second exhaust-heat boiler to the operating first one under the conditions of flow circuits of combined-cycle plants with two gas-turbine units and one steam turbine  

Science Journals Connector (OSTI)

Problems arising with connecting the second exhaust-heat boiler to the first exhaust-heat boiler under load in the case of flow circuits of combined-cycle plants of type PGU-450 are considered. Similar problem...

Yu. A. Radin; I. A. Grishin; T. S. Kontorovich

2006-03-01T23:59:59.000Z

480

Odd q-state clock spin-glass models in three dimensions, asymmetric phase diagrams, and multiple algebraically ordered phases  

E-Print Network (OSTI)

Distinctive orderings and phase diagram structures are found, from renormalization-group theory, for odd q-state clock spin-glass models in d = 3 dimensions. These models exhibit asymmetric phase diagrams, as is also the ...

Ilker, Efe

Note: This page contains sample records for the topic "gas flow diagram" 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

Pressure and flow characteristics of restrictive flow orifice devices.  

SciTech Connect

A Restrictive Flow Orifice (RFO) can be used to enhance the safe design of a pressure system in several ways. Pressure systems frequently incorporate a regulator and relief valve to protect the downstream equipment from accidental overpressure caused by regulator failure. Analysis frequently shows that in cases of high-flow regulator failure, the downstream pressure may rise significantly above the set pressure of the relief valve. This is due to limited flow capacity of the relief valve. A different regulator or relief valve may need to be selected. A more economical solution to this problem is to use an RFO to limit the maximum system flow to acceptable limits within the flow capacity of the relief valve, thereby enhancing the overpressure protection of laboratory equipment. An RFO can also be used to limit the uncontrolled release of system fluid (gas or liquid) upon component or line failure. As an example, potential asphyxiation hazards resultant from the release of large volumes of inert gas from a 'house' nitrogen system can be controlled by the use of an RFO. This report describes a versatile new Sandia-designed RFO available from the Swagelok Company and specifies the gas flow characteristics of this device. Two sizes, 0.010 and 0.020 inch diameter RFOs are available. These sizes will allow enhanced safety for many common applications. This new RFO design are now commercially available and provide advantages over existing RFOs: a high pressure rating (6600 psig); flow through the RFO is equal for either forward or reverse directions; they minimize the potential for leakage by incorporating the highest quality threaded connections; and can enhance the safety of pressure systems.

Shrouf, Roger D.

2003-06-01T23:59:59.000Z

482

Experimental and Numerical Investigation of Flows in Expanding Channels  

SciTech Connect

We present an experimental realization of the classical Jeffery-Hamel flows inside a wedge-shaped channel. We compare the measured velocity fields with the predictions of Jeffery-Hamel theory. A detailed experimental study of bifurcation diagrams for the solutions reveals the absolute stability of the pure outflow solution and an interesting hysteretic structure for bifurcations. We also observe a multiple vortex flow regime predicted earlier numerically and analytically. Experimental studies of the stability of the flow to perturbations at the channel exit are also conducted.

Vorobieff, Peter; Putkaradze, Vakhtang

2008-10-24T23:59:59.000Z

483

Evaluation of a Close Coupled Slotted Orifice, Electrical Impedance, and Swirl Flow Meters for Multiphase Flow  

E-Print Network (OSTI)

homogenized flow for several pipe diameters downstream of the plate. This characteristic provides a homogeneous mixture at the inlet of the swirl meter, and impedance probe for gas volume fraction measurement (GVF). In order to evaluate the performance...

Cevik, Muhammet

2013-09-11T23:59:59.000Z

484

Structural development of vortical flows around a square jet in cross-flow  

Science Journals Connector (OSTI)

...1324 Structural development of vortical flows...the structural development of the entire...the structural development of the jet wake...computer hardware technology and computational...sewerage outfalls, gas- turbine cooling, and...

2004-01-01T23:59:59.000Z

485

International Conference on Gas Hydrates May 19-23, 2002, Yokohama  

E-Print Network (OSTI)

of hydrates for transport and storage of natural gas and in cold flow technology. In a continuous stirred tank. The same conditions are relevant in cold flow technology where oil, gas and water are passed through4th International Conference on Gas Hydrates May 19-23, 2002, Yokohama Hydrate Formation Rate

Gudmundsson, Jon Steinar

486

Trace Analysis of Ethinyl Estradiol in Casein Diet Using Gas Chromatography with Electron Capture Detection  

Science Journals Connector (OSTI)

......and cervical mucus by gas chromatog- raphy (GC...was used as the carrier gas at a flow rate of 0...and the detector makeup gas was nitrogen flowing at...relatively simple, safe, and cost effective to perform...temperature to ensure production of a single derivative......

Ronald L. Evans; Larry G. Rushing; Stanley M. Billedeau; Claude L. Holder; Paul H. Siitonen

2005-02-01T23:59:59.000Z

487

EIA - Natural Gas Pipeline Network - Natural Gas Import/Export Locations  

U.S. Energy Information Administration (EIA) Indexed Site

Pipelines > Import/Export Location List Pipelines > Import/Export Location List About U.S. Natural Gas Pipelines - Transporting Natural Gas based on data through 2007/2008 with selected updates Currently, there are 58 locations at which natural gas can be exported or imported into the United States, including 9 LNG (liquefied natural gas) facilities in the continental United States and Alaska (There is a tenth U.S. LNG import facility located in Puerto Rico). At 28 of these locations natural gas or LNG currently can only be imported; while at 17 they may only be exported (1 LNG export facility is located in Alaska). At 13 of the 58 locations natural gas may, and sometimes does, flow in both directions, although at each of these sites the flow is primarily either import or export.

488

Chapter 9 - Natural Gas Dehydration  

Science Journals Connector (OSTI)

Natural, associated, or tail gas usually contains water, in liquid and/or vapor form, at source and/or as a result of sweetening with an aqueous solution. Operating experience and thorough engineering have proved that it is necessary to reduce and control the water content of gas to ensure safe processing and transmission. Pipeline drips installed near wellheads and at strategic locations along gathering and trunk lines will eliminate most of the free water lifted from the wells in the gas stream. Multistage separators can also be deployed to ensure the reduction of free water that may be present. However, the removal of the water vapor that exists in solution in natural gas requires a more complex treatment. This treatment consists of dehydrating the natural gas, which is accomplished by lowering the dew point temperature of the gas at which water vapor will condense from the gas. There are several methods of dehydrating natural gas. The most common of these are liquid desiccant (glycol) dehydration, solid desiccant dehydration, and cooling the gas. Any of these methods may be used to dry gas to a specific water content. Usually, the combination of the water content specification, initial water content, process character, operational nature, and economic factors determine the dehydration method to be utilized. However, the choice of dehydration method is usually between glycol and solid desiccants. These are presented in depth in subsequent portions of this chapter. Keywords: absorber, adsorption isotherm, bed loading, chemisorption, dehydration, desiccant, desiccant regeneration, equilibrium zone, flash tank, flow distribution, glycol circulation pump, glycol dehydration, inlet feed contamination, liquid carryover, mass transfer zone, molecular sieve, overcirculation, reboiler, solubility, still, surge tank, undercirculation.

Saeid Mokhatab; William A. Poe

2012-01-01T23:59:59.000Z

489

Harmonization of initial estimates of shale gas life cycle greenhouse gas emissions for electric power generation  

Science Journals Connector (OSTI)

...rock allow for the release and collection of the natural gas. Fracking can be done in vertical or horizontal wells. Liquids...methods to increase gas flows, such as mechanical or chemical fracking, is often required before the wells are able to produce commercial...

Garvin A. Heath; Patrick ODonoughue; Douglas J. Arent; Morgan Bazilian

2014-01-01T23:59:59.000Z

490

Development of Next Generation Multiphase Pipe Flow Prediction Tools  

SciTech Connect

The developments of fields in deep waters (5000 ft and more) is a common occurrence. It is inevitable that production systems will operate under multiphase flow conditions (simultaneous flow of gas-oil-and water possibly along with sand, hydrates, and waxes). Multiphase flow prediction tools are essential for every phase of the hydrocarbon recovery from design to operation. The recovery from deep-waters poses special challenges and requires accurate multiphase flow predictive tools for several applications including the design and diagnostics of the production systems, separation of phases in horizontal wells, and multiphase separation (topside, seabed or bottom-hole). It is very crucial to any multiphase separation technique that is employed either at topside, seabed or bottom-hole to know inlet conditions such as the flow rates, flow patterns, and volume fractions of gas, oil and water coming into the separation devices. The overall objective was to develop a unified model for gas-oil-water three-phase flow in wells, flow lines, and pipelines to predict the flow characteristics such as flow patterns, phase distributions, and pressure gradient encountered during petroleum production at different flow conditions (pipe diameter and inclination, fluid properties and flow rates). The project was conducted in two periods. In Period 1 (four years), gas-oil-water flow in pipes were investigated to understand the fundamental physical mechanisms describing the interaction between the gas-oil-water phases under flowing conditions, and a unified model was developed utilizing a novel modeling approach. A gas-oil-water pipe flow database including field and laboratory data was formed in Period 2 (one year). The database was utilized in model performance demonstration. Period 1 primarily consisted of the development of a unified model and software to predict the gas-oil-water flow, and experimental studies of the gas-oil-water project, including flow behavior description and closure relation development for different flow conditions. Modeling studies were performed in two parts, Technology Assessment and Model Development and Enhancement. The results of the Technology assessment study indicated that the performance of the current state of the art two-phase flow models was poor especially for three-phase pipeline flow when compared with the existing data. As part of the model development and enhancement study, a new unified model for gas-oil-water three-phase pipe flow was developed. The new model is based on the dynamics of slug flow, which shares transition boundaries with all the other flow patterns. The equations of slug flow are used not only to calculate the slug characteristics, but also to predict transitions from slug flow to other flow patterns. An experimental program including three-phase gas-oil-water horizontal flow and two-phase horizontal and inclined oil-water flow testing was conducted utilizing a Tulsa University Fluid Flow Projects Three-phase Flow Facility. The experimental results were incorporated into the unified model as they became available, and model results were used to better focus and tailor the experimental study. Finally, during the Period 2, a new three-phase databank has been developed using the data generated during this project and additional data available in the literature. The unified model to predict the gas-oil-water three phase flow characteristics was tested by comparing the prediction results with the data. The results showed good agreements.

Tulsa Fluid Flow

2008-08-31T23:59:59.000Z

491

Development of a high-performance coal-fired power generating system with pyrolysis gas and char-fired high temperature furnace (HITAF). Quarterly progress report No. 3, July--September 1992  

SciTech Connect

A concept for an advanced coal-fired combined-cycle power generating system is currently being developed. The first phase of this three-phase program consists of conducting the necessary research and development to define the system, evaluate the economic and technical feasibility of the concept, and prepare an R & D plan to develop the concept further. Foster Wheeler Development Corporation is leading a team ofcompanies involved in this effort. The system proposed to meet these goals is a combined-cycle system where air for a gas turbine is indirectly heated to approximately 1800{degrees}F in furnaces fired with cool-derived fuels and then directly heated in a natural-gas-fired combustor up to about 2400{degrees}F. The system is based on a pyrolyzing process that converts the coal into a low-Btu fuel gas and char. The fuelgas is a relatively clean fuel, and it is fired to heat tube surfaces that are susceptible to corrosion and problems from ash deposition. In particular, the high-temperature air heater tubes, which will need tobe a ceramic material, will be located in a separate furnace or region of a furnace that is exposed to combustion products from the low-Btu fuel gas only. A simplified process flow diagram is shown.

Not Available

1992-11-01T23:59:59.000Z

492

Natural Gas  

Gasoline and Diesel Fuel Update (EIA)

73,669 73,669 141,300 1.59 221,822 1.12 3 0.10 46,289 0.88 33,988 1.24 31,006 0.98 252,585 1.26 A r k a n s a s Arkansas 51. Summary Statistics for Natural Gas Arkansas, 1992-1996 Table 1992 1993 1994 1995 1996 Reserves (billion cubic feet) Estimated Proved Reserves (dry) as of December 31 ....................................... 1,750 1,552 1,607 1,563 1,470 Number of Gas and Gas Condensate Wells Producing at End of Year.............................. 3,500 3,500 3,500 3,988 4,020 Production (million cubic feet) Gross Withdrawals From Gas Wells ......................................... 171,543 166,273 161,967 161,390 182,895 From Oil Wells ........................................... 39,364 38,279 33,446 33,979 41,551 Total.............................................................. 210,906 204,552 195,413 195,369 224,446 Repressuring ................................................

493

Natural Gas  

Gasoline and Diesel Fuel Update (EIA)

-1,080,240 -1,080,240 201,024 2.27 1,734,887 8.78 133 4.54 76,629 1.46 136,436 4.99 46,152 1.46 460,373 2.30 O k l a h o m a Oklahoma 84. Summary Statistics for Natural Gas Oklahoma, 1992-1996 Table 1992 1993 1994 1995 1996 Reserves (billion cubic feet) Estimated Proved Reserves (dry) as of December 31 ....................................... 13,926 13,289 13,487 13,438 13,074 Number of Gas and Gas Condensate Wells Producing at End of Year.............................. 28,902 29,118 29,121 29,733 29,733 Production (million cubic feet) Gross Withdrawals From Gas Wells ......................................... 1,674,405 1,732,997 1,626,858 1,521,857 1,467,695 From Oil Wells ........................................... 342,950 316,945 308,006 289,877 267,192 Total.............................................................. 2,017,356 2,049,942 1,934,864

494

Natural Gas  

Gasoline and Diesel Fuel Update (EIA)

7,038,115 7,038,115 3,528,911 39.78 13,646,477 69.09 183 6.24 408,861 7.80 1,461,718 53.49 281,452 8.91 5,681,125 28.40 West South Central West South Central 42. Summary Statistics for Natural Gas West South Central, 1992-1996 Table 1992 1993 1994 1995 1996 Reserves (billion cubic feet) Estimated Proved Reserves (dry) as of December 31 ....................................... 87,198 84,777 88,034 88,734 62,357 Number of Gas and Gas Condensate Wells Producing at End of Year.............................. 92,212 95,288 94,233 102,525 102,864 Production (million cubic feet) Gross Withdrawals From Gas Wells ......................................... 11,599,913 11,749,649 11,959,444 11,824,788 12,116,665 From Oil Wells ........................................... 2,313,831 2,368,395 2,308,634 2,217,752 2,151,247 Total..............................................................

495

Natural Gas  

Gasoline and Diesel Fuel Update (EIA)

77,379 77,379 94,481 1.07 81,435 0.41 8 0.27 70,232 1.34 1,836 0.07 40,972 1.30 207,529 1.04 K e n t u c k y Kentucky 65. Summary Statistics for Natural Gas Kentucky, 1992-1996 Table 1992 1993 1994 1995 1996 Reserves (billion cubic feet) Estimated Proved Reserves (dry) as of December 31 ....................................... 1,084 1,003 969 1,044 983 Number of Gas and Gas Condensate Wells Producing at End of Year.............................. 12,483 12,836 13,036 13,311 13,501 Production (million cubic feet) Gross Withdrawals From Gas Wells ......................................... 79,690 86,966 73,081 74,754 81,435 From Oil Wells ........................................... 0 0 0 0 0 Total.............................................................. 79,690 86,966 73,081 74,754 81,435 Repressuring ................................................

496

Natural Gas  

Gasoline and Diesel Fuel Update (EIA)

-67,648 -67,648 75,616 0.85 480,828 2.43 0 0.00 16,720 0.32 31,767 1.16 29,447 0.93 153,549 0.77 Pacific Noncontiguous Pacific Noncontiguous 45. Summary Statistics for Natural Gas Pacific Noncontiguous, 1992-1996 Table 1992 1993 1994 1995 1996 Reserves (billion cubic feet) Estimated Proved Reserves (dry) as of December 31 ....................................... 9,638 9,907 9,733 9,497 9,294 Number of Gas and Gas Condensate Wells Producing at End of Year.............................. 112 113 104 100 102 Production (million cubic feet) Gross Withdrawals From Gas Wells ......................................... 198,603 190,139 180,639 179,470 183,747 From Oil Wells ........................................... 2,427,110 2,588,202 2,905,261 3,190,433 3,189,837 Total.............................................................. 2,625,713 2,778,341

497

Natural Gas  

Gasoline and Diesel Fuel Update (EIA)

-310,913 -310,913 110,294 1.24 712,796 3.61 2 0.07 85,376 1.63 22,607 0.83 57,229 1.81 275,508 1.38 K a n s a s Kansas 64. Summary Statistics for Natural Gas Kansas, 1992-1996 Table 1992 1993 1994 1995 1996 Reserves (billion cubic feet) Estimated Proved Reserves (dry) as of December 31 ....................................... 9,681 9,348 9,156 8,571 7,694 Number of Gas and Gas Condensate Wells Producing at End of Year.......................