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1

Static Temperature Survey | Open Energy Information  

Open Energy Info (EERE)

Static Temperature Survey Static Temperature Survey Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Static Temperature Survey Details Activities (28) Areas (24) Regions (2) NEPA(0) Exploration Technique Information Exploration Group: Downhole Techniques Exploration Sub Group: Well Testing Techniques Parent Exploration Technique: Well Testing Techniques Information Provided by Technique Lithology: Stratigraphic/Structural: Hydrological: Thermal: Extrapolate the true temperature of the formation the well penetrates Cost Information Low-End Estimate (USD): 0.2525 centUSD 2.5e-4 kUSD 2.5e-7 MUSD 2.5e-10 TUSD / foot Median Estimate (USD): 0.3535 centUSD 3.5e-4 kUSD 3.5e-7 MUSD 3.5e-10 TUSD / foot High-End Estimate (USD): 0.7575 centUSD 7.5e-4 kUSD 7.5e-7 MUSD

2

Static Testing Tools for Tcl Lindsay Marshall  

E-Print Network (OSTI)

Static Testing Tools for Tcl Lindsay Marshall Dept of Computing Science University of Newcastle upon Tyne UK NE1 7RU Abstract Simple static testing of tcl programs can detect a large class of common Introduction The great advantage of an interpreted language like tcl is the freedom it gives you to create

Newcastle upon Tyne, University of

3

Primary Piping Static Test Design Request  

SciTech Connect

It is requested that a design be initiated for the primary piping static test. This test is necessary to provide information as to the reliability of the pipe subjected to reactor operating conditions. The test conditions are as follows: temperature - 2000 F (isothermal), pressure effective - 42 psi, and test time - 10,000 hours. It will be necessary to test two sizes of pipe as shown on the preliminary piping layout (2.250-inch O.D. x .095-inch wall and 3 1/2 SCH. 10 pipe). The test specimens shall be jacketed in an inconel containment vessel. The test rig should be similar to the design of the 4-inch pressure vessels (T-1030244). In addition an outer containment vessel constructed of stainless steel must be provided around the clam shell heaters and the inconel containment vessel. This is to provide an inert atmosphere for the inconel vessel. Provisions should be made in the design for a 1/4-inch clad thermocouple. It is planned to use the pipe test as a vehicle for studying experimental Tc's (Cb-Mo and W-W.26% Re).

O' Brien, R.W.

1961-11-30T23:59:59.000Z

4

Check 'n' crash: combining static checking and testing  

Science Conference Proceedings (OSTI)

We present an automatic error-detection approach that combines static checking and concrete test-case generation. Our approach consists of taking the abstract error conditions inferred using theorem proving techniques by a static checker (ESC/Java), ... Keywords: automatic testing, dynamic analysis, extended static checking, static analysis, test case generation, usability

Christoph Csallner; Yannis Smaragdakis

2005-05-01T23:59:59.000Z

5

STATIC SODIUM TEST OF WESTINGHOUSE FLOW CONTROLLER BEARING  

SciTech Connect

Tests were carried out to determine the action of a static sodium environment on a special high-temperature ball bearing while operating at the specified speed and loading. The test bearing was operated at 85 rpm and 870 pounds axial load for 385 hr at 1000 deg F. Visual inspection of the test bearing showed a very marked increase in roughness of both the balls and the ball races. Details of the measurements and a photograph of the bearing parts after test are given. On the basis of this test it did not appear that this bearing will be satisfactory for the service intended. (M.C.G.)

Cygan, R.

1960-12-01T23:59:59.000Z

6

Static Temperature Survey At Wister Area (DOE GTP) | Open Energy  

Open Energy Info (EERE)

source source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Page Edit History Facebook icon Twitter icon » Static Temperature Survey At Wister Area (DOE GTP) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Static Temperature Survey At Wister Area (DOE GTP) Exploration Activity Details Location Wister Area Exploration Technique Static Temperature Survey Activity Date Usefulness not indicated DOE-funding Unknown References (1 January 2011) GTP ARRA Spreadsheet Retrieved from "http://en.openei.org/w/index.php?title=Static_Temperature_Survey_At_Wister_Area_(DOE_GTP)&oldid=511165" Categories: Exploration Activities DOE Funded Activities

7

Static Temperature Survey At Blue Mountain Area (Fairbank Engineering,  

Open Energy Info (EERE)

Static Temperature Survey At Blue Mountain Area (Fairbank Engineering, Static Temperature Survey At Blue Mountain Area (Fairbank Engineering, 2010) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Static Temperature Survey At Blue Mountain Area (Fairbank Engineering, 2010) Exploration Activity Details Location Blue Mountain Area Exploration Technique Static Temperature Survey Activity Date Usefulness useful DOE-funding Unknown Notes Using a precision thermistor probe, EGI, University of Utah, obtained detailed temperature logs of eleven new mineral exploration holes drilled at Blue Mountain. The holes, ranging in depth from 99 to 244 meters (325 to 800 feet), were drilled in areas to the northeast, northwest and southwest of, and up to distances of two kilometers from, the earlier mineral exploration drill holes that encountered hot artesian flows. Unfortunately,

8

Estimation of static formation temperatures in geothermal wells | Open  

Open Energy Info (EERE)

Estimation of static formation temperatures in geothermal wells Estimation of static formation temperatures in geothermal wells Jump to: navigation, search OpenEI Reference LibraryAdd to library Journal Article: Estimation of static formation temperatures in geothermal wells Abstract Stabilized formation temperatures were estimated at different depths in 40 wells from the Los Humeros geothermal field, Mexico, using the Horner and the spherical radial flow (SRF) methods. The results showed that the Horner method underestimates formation temperatures, while the SRF method gives temperatures that are closer to the true formation temperatures. This was supported by numerical simulation of a combined circulation and shut-in period in several wells, and results for well H-26 are presented. Numerical reproduction of logged temperature is more feasible if an initial

9

Testing Technology of Torsional Vibration Spring Static Stiffness  

Science Conference Proceedings (OSTI)

The principle and method of testing static stiffness of torsional vibration spring are put forward based on the structure of dual-mass flywheel with torsional vibration spring, and the test bench is designed for these. The testing data is collected by ... Keywords: LabVIEW, dual-mass flywheel, static stiffness, torsional vibration spring

Zhengfeng Jiang; Shaobo Xu; Lei Chen

2008-10-01T23:59:59.000Z

10

Static Temperature Survey At Coso Geothermal Area (1977) | Open Energy  

Open Energy Info (EERE)

Static Temperature Survey At Coso Geothermal Area Static Temperature Survey At Coso Geothermal Area (1977) Exploration Activity Details Location Coso Geothermal Area Exploration Technique Static Temperature Survey Activity Date 1977 Usefulness not indicated DOE-funding Unknown Notes Temperature logs were taken during and after drilling: Results: Convective heat flow and temperatures greater than 350 F appear to occur only along an open fracture system encountered between depths of 1850 and 2775 feet. Temperature logs indicate a negative thermal gradient below 3000 feet. Water chemistry indicates that this geothermal resource is a hot-water rather than a vapor-dominated system. References Galbraith, R. M. (1 May 1978) Geological and geophysical analysis of Coso Geothermal Exploration Hole No. 1 (CGEH-1), Coso Hot Springs KGRA,

11

Static Temperature Survey At Hot Pot Area (DOE GTP) | Open Energy...  

Open Energy Info (EERE)

Static Temperature Survey At Hot Pot Area (DOE GTP) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Static Temperature Survey At Hot Pot Area...

12

Static Temperature Survey At Molokai Area (Thomas, 1986) | Open Energy  

Open Energy Info (EERE)

Molokai Area (Thomas, 1986) Molokai Area (Thomas, 1986) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Static Temperature Survey At Molokai Area (Thomas, 1986) Exploration Activity Details Location Molokai Area Exploration Technique Static Temperature Survey Activity Date Usefulness useful DOE-funding Unknown Notes Due to the very small potential market on the island of Molokai for geothermal energy, only a limited effort was made to confirm a resource in the identified PGRA. An attempt was made to locate the (now abandoned) water well that was reported to have encountered warm saline fluids. The well was located but had caved in above the water table and thus no water sampling was possible. Temperature measurements in the open portion of the well were performed, but no temperatures significantly above ambient were

13

Detecting Test Clones with Static Analysis.  

E-Print Network (OSTI)

??Large-scale software systems often have correspondingly complicated test suites, which are diffi cult for developers to construct and maintain. As systems evolve, engineers must update (more)

Jain, Divam

2013-01-01T23:59:59.000Z

14

Static Temperature Survey At Steamboat Springs Area (Combs, Et Al., 1999) |  

Open Energy Info (EERE)

Steamboat Springs Area Steamboat Springs Area (Combs, Et Al., 1999) Exploration Activity Details Location Steamboat Springs Area Exploration Technique Static Temperature Survey Activity Date Usefulness not indicated DOE-funding Unknown Notes Numerous temperature logs were taken with Sandia'splatinum-resistance-thermometer (PRT) tool which along with a Sandia logging truck remained on-site for the entire project. Static temperature logs (no flow in hole) were done with this tool before each series of productiotilnjection tests. References Jim Combs, John T. Finger, Colin Goranson, Charles E. Hockox Jr., Ronald D. Jacobsen, Gene Polik (1999) Slimhole Handbook- Procedures And Recommendations For Slimhole Drilling And Testing In Geothermal Exploration Retrieved from "http://en.openei.org/w/index.php?title=Static_Temperature_Survey_At_Steamboat_Springs_Area_(Combs,_Et_Al.,_1999)&oldid=511162"

15

Static Temperature Survey At Reese River Area (Henkle & Ronne, 2008) | Open  

Open Energy Info (EERE)

Reese River Area (Henkle & Ronne, 2008) Reese River Area (Henkle & Ronne, 2008) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Static Temperature Survey At Reese River Area (Henkle & Ronne, 2008) Exploration Activity Details Location Reese River Area Exploration Technique Static Temperature Survey Activity Date Usefulness not indicated DOE-funding Unknown Notes Temperature logs were run on well 56-4 on March 22, April 28 and Nov. 9, 2007. The respective maximum bottom hole temperatures of 121.9°C, 121.2°C and 124.5°C were recorded for each of the three logging runs. References William R. Henkle, Joel Ronne (2008) Phase 2 Reese River Geothermal Project Slim Well 56-4 Drilling And Testing Retrieved from "http://en.openei.org/w/index.php?title=Static_Temperature_Survey_At_Reese_River_Area_(Henkle_%26_Ronne,_2008)&oldid=511159"

16

Static Temperature Survey (Cull, 1981) | Open Energy Information  

Open Energy Info (EERE)

(Cull, 1981) (Cull, 1981) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Static Temperature Survey (Cull, 1981) Exploration Activity Details Location Unspecified Exploration Technique Static Temperature Survey Activity Date Usefulness useful DOE-funding Unknown Notes Although absolute values of heat flow may not be accurately determined with conventional techniques even at depths of 1000 m, data useful for exploration can be obtained in shallower holes at a suitably chosen standard depth; constant corrections are then applicable but they need not be specified for relative heat flow. These values can then be used in modeling the local thermal structure which may then indicate a geothermal resource. For geothermal exploration it is preferable to measure heat flow

17

Gluonic profile of the static baryon at finite temperature  

E-Print Network (OSTI)

The gluon flux distribution of a static three quark system has been revealed at finite temperature in the pure SU(3) Yang-Mills theory. An action density operator is correlated with three Polyakov loops representing the baryonic state at a temperatures near the end of the QCD plateau, T/T_c = 0.8, and another just before the deconfinement point, T/T_c = 0.9. The flux distributions at short distance separations between the quarks display an action-density profile consistent with a filled Delta shape iso-surface. However the Delta-shaped action iso-surface distributions are found to persist even at large inter-quark separations for both temperatures. The action density distribution in the quark plane exhibits a nonuniform pattern for all quark separations considered. This result contrasts the well-known Y-shaped uniform action density gluonic-flux profile obtained using the Wilson-loop as a quark source operator at zero temperature. We systematically measure and compare the main aspects of the profile of the flux distribution at the two considered temperature scales for three sets of isosceles triangle quark configurations. The radii, amplitudes and rate of change of the width of the flux distribution are found to reverse their behavior as the temperature increase from the end of the QCD plateau region towards the deconfinement point. Remarkably, we find the mean square width of the flux distribution shrinks and localizes for quark separations larger than 1.0 fm at T/T_c = 0.8 which results in an identifiable Y-shaped radius profile. Near the deconfinement point, the action-density delocalizes and the width broadens linearly at large quark separations.

Ahmed S. Bakry; Derek B. Leinweber; Anthony G. Williams

2011-07-01T23:59:59.000Z

18

Standard test method for static leaching of monolithic waste forms for disposal of radioactive waste  

E-Print Network (OSTI)

1.1 This test method provides a measure of the chemical durability of a simulated or radioactive monolithic waste form, such as a glass, ceramic, cement (grout), or cermet, in a test solution at temperatures method can be used to characterize the dissolution or leaching behaviors of various simulated or radioactive waste forms in various leachants under the specific conditions of the test based on analysis of the test solution. Data from this test are used to calculate normalized elemental mass loss values from specimens exposed to aqueous solutions at temperatures <100C. 1.3 The test is conducted under static conditions in a constant solution volume and at a constant temperature. The reactivity of the test specimen is determined from the amounts of components released and accumulated in the solution over the test duration. A wide range of test conditions can be used to study material behavior, includin...

American Society for Testing and Materials. Philadelphia

2010-01-01T23:59:59.000Z

19

Static load test of Arquin-designed CMU wall.  

Science Conference Proceedings (OSTI)

The Arquin Corporation has developed a new method of constructing CMU (concrete masonry unit) walls. This new method uses polymer spacers connected to steel wires that serve as reinforcing as well as means of accurately placing the spacers so that the concrete block can be dry stacked. The hollows of the concrete block used in constructing the wall are then filled with grout. As part of a New Mexico Small Business Assistance Program (NMSBAP), Sandia National Laboratories conducted a series of tests that statically loaded wall segments to compare the Arquin method to a more traditional method of constructing CMU walls. A total of 12 tests were conducted, three with the Arquin method using a W5 reinforcing wire, three with the traditional method of construction using a number 3 rebar as reinforcing, three with the Arquin method using a W2 reinforcing wire, and three with the traditional construction method but without rebar. The results of the tests showed that the walls constructed with the Arquin method and with a W5 reinforcing wire withstood more load than any of the other three types of walls that were tested.

Jensen, Richard Pearson; Cherry, Jeffery L.

2008-12-01T23:59:59.000Z

20

Static Temperature Survey At Maui Area (DOE GTP) | Open Energy Information  

Open Energy Info (EERE)

Static Temperature Survey At Maui Area (DOE GTP) Static Temperature Survey At Maui Area (DOE GTP) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Static Temperature Survey At Maui Area (DOE GTP) Exploration Activity Details Location Maui Area Exploration Technique Static Temperature Survey Activity Date Usefulness not indicated DOE-funding Unknown References (1 January 2011) GTP ARRA Spreadsheet Retrieved from "http://en.openei.org/w/index.php?title=Static_Temperature_Survey_At_Maui_Area_(DOE_GTP)&oldid=511154" Categories: Exploration Activities DOE Funded Activities ARRA Funded Activities What links here Related changes Special pages Printable version Permanent link Browse properties 429 Throttled (bot load) Error 429 Throttled (bot load) Throttled (bot load) Guru Meditation:

Note: This page contains sample records for the topic "test static temperature" 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

Static Temperature Survey At Kilauea East Rift Area (Rudman & Epp, 1983) |  

Open Energy Info (EERE)

Static Temperature Survey At Kilauea East Rift Area (Rudman & Epp, 1983) Static Temperature Survey At Kilauea East Rift Area (Rudman & Epp, 1983) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Static Temperature Survey At Kilauea East Rift Area (Rudman & Epp, 1983) Exploration Activity Details Location Kilauea East Rift Area Exploration Technique Static Temperature Survey Activity Date Usefulness not indicated DOE-funding Unknown Notes Drilling of HGP-A was completed on April 28, 1976. An equilibrium temperature was not measured in HGP-A; the well was flashed before the drilling disturbance was dissipated. However, before the mud was pumped out, temperatures in the well were measured at 15, 75, 97,145, and 193 hours, and at 13, 21, and 22 days after circulation of the drilling mud stopped. These temperature data are shown in Fig. 2. Between 305 m and 914

22

Static Temperature Survey At Fish Lake Valley Area (Deymonaz, Et Al., 2008)  

Open Energy Info (EERE)

Static Temperature Survey At Fish Lake Valley Area (Deymonaz, Et Al., 2008) Static Temperature Survey At Fish Lake Valley Area (Deymonaz, Et Al., 2008) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Static Temperature Survey At Fish Lake Valley Area (Deymonaz, Et Al., 2008) Exploration Activity Details Location Fish Lake Valley Area Exploration Technique Static Temperature Survey Activity Date Usefulness not indicated DOE-funding Unknown Notes While drilling, maximum reading thermometers will be used to monitor formation temperatures as discussed above. Upon completion of the drilling a temperature log will be run inside the drill rods to K943TD. References John Deymonaz, Jeffrey G. Hulen, Gregory D. Nash, Alex Schriener (2008) Esmeralda Energy Company Final Scientific Technical Report, January

23

Static Temperature Survey At Medicine Lake Area (Warpinski, Et Al., 2004) |  

Open Energy Info (EERE)

4) 4) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Static Temperature Survey At Medicine Lake Area (Warpinski, Et Al., 2004) Exploration Activity Details Location Medicine Lake Area Exploration Technique Static Temperature Survey Activity Date Usefulness useful DOE-funding Unknown Notes Update to Warpinski, et al., 2002 References N. R. Warpinski, A. R. Sattler, R. Fortuna, D. A. Sanchez, J. Nathwani (2004) Geothermal Resource Exploration And Definition Projects Retrieved from "http://en.openei.org/w/index.php?title=Static_Temperature_Survey_At_Medicine_Lake_Area_(Warpinski,_Et_Al.,_2004)&oldid=511156" Categories: Exploration Activities DOE Funded Activities What links here Related changes Special pages Printable version

24

Static Temperature Survey At Vale Hot Springs Area (Combs, Et Al., 1999) |  

Open Energy Info (EERE)

Vale Hot Springs Area (Combs, Et Al., 1999) Vale Hot Springs Area (Combs, Et Al., 1999) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Static Temperature Survey At Vale Hot Springs Area (Combs, Et Al., 1999) Exploration Activity Details Location Vale Hot Springs Area Exploration Technique Static Temperature Survey Activity Date Usefulness not indicated DOE-funding Unknown Notes Numerous temperature logs were taken with Sandia's platinum-resistance-thermometer (PRT) tool which along with a Sandia logging truck remained on-site for the entire project. Static temperature logs (no flow in hole) were done with this tool when coring operations were suspended for bit trips, rig maintenance, or other time intervals that would permit the hole to warm up near its static temperature gradient.

25

Static Temperature Survey At Chena Area (Erkan, Et. Al., 2008) | Open  

Open Energy Info (EERE)

Static Temperature Survey At Chena Area (Erkan, Et. Al., 2008) Static Temperature Survey At Chena Area (Erkan, Et. Al., 2008) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Static Temperature Survey At Chena Area (Erkan, Et. Al., 2008) Exploration Activity Details Location Chena Area Exploration Technique Static Temperature Survey Activity Date Usefulness useful DOE-funding Unknown Notes Once a hole is drilled the natural-state pressure distribution with depth is essentially unrecoverable (Grant et al., 1982). One of the best ways to mitigate this effect is to use multi-stage drilling (White et al., 1975; Grant et al., 1982). This type of drilling was applied at Chena and its usefulness in understanding the natural flow regimes is demonstrated. Here, we illustrate how high-quality equilibrium temperature logs can often be

26

Phenylnaphthalene as a Heat Transfer Fluid for Concentrating Solar Power: High-Temperature Static Experiments  

SciTech Connect

Concentrating solar power (CSP) may be an alternative to generating electricity from fossil fuels; however, greater thermodynamic efficiency is needed to improve the economics of CSP operation. One way of achieving improved efficiency is to operate the CSP loop at higher temperatures than the current maximum of about 400 C. ORNL has been investigating a synthetic polyaromatic oil for use in a trough type CSP collector, to temperatures up to 500 C. The oil was chosen because of its thermal stability and calculated low vapor and critical pressures. The oil has been synthesized using a Suzuki coupling mechanism and has been tested in static heating experiments. Analysis has been conducted on the oil after heating and suggests that there may be some isomerization taking place at 450 C, but the fluid appears to remain stable above that temperature. Tests were conducted over one week and further tests are planned to investigate stabilities after heating for months and in flow configurations. Thermochemical data and thermophysical predictions indicate that substituted polyaromatic hydrocarbons may be useful for applications that run at higher temperatures than possible with commercial fluids such as Therminol-VP1.

Bell, Jason R [ORNL; Joseph III, Robert Anthony [ORNL; McFarlane, Joanna [ORNL; Qualls, A L [ORNL

2012-05-01T23:59:59.000Z

27

Static Temperature Survey At U.S. South Region (Smith & Dees, 1982) | Open  

Open Energy Info (EERE)

Static Temperature Survey At U.S. South Region (Smith & Dees, 1982) Static Temperature Survey At U.S. South Region (Smith & Dees, 1982) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Static Temperature Survey At U.S. South Region (Smith & Dees, 1982) Exploration Activity Details Location U.S. South Region Exploration Technique Static Temperature Survey Activity Date Usefulness useful DOE-funding Unknown Notes (Louisiana & Mississippi): "cased, non-flowing boreholes at least 150 m deep were sought on an opportunistic basis through state geological surveys and U.S. Geological Survey offices. Representative samples of drill cuttings were used for laboratory measurements of thermal conductivity. A total of 38 new heat flow values, ranging from less than 1 heat flow unit (hfu) (41.8 mW/m 2) to more than 2 hfu, were determined (Smith and Dees, in

28

Static Temperature Survey At Kilauea Summit Area (Keller, Et Al., 1979) |  

Open Energy Info (EERE)

source source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Page Edit History Facebook icon Twitter icon » Static Temperature Survey At Kilauea Summit Area (Keller, Et Al., 1979) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Static Temperature Survey At Kilauea Summit Area (Keller, Et Al., 1979) Exploration Activity Details Location Kilauea Summit Area Exploration Technique Static Temperature Survey Activity Date Usefulness useful DOE-funding Unknown References George V. Keller, L. Trowbridge Grose, John C. Murray, Catherine K. Skokan (1979) Results Of An Experimental Drill Hole At The Summit Of Kilauea Volcano, Hawaii Retrieved from "http://en.openei.org/w/index.php?title=Static_Temperature_Survey_At_Kilauea_Summit_Area_(Keller,_Et_Al.,_1979)&oldid=511148"

29

Static Temperature Survey At Long Valley Caldera Area (Farrar...  

Open Energy Info (EERE)

On The Hydrothermal System Beneath The Resurgent Dome In Long Valley Caldera, East-Central California, Usa, From Recent Pumping Tests And Geochemical Sampling Retrieved from...

30

Static Temperature Survey At Long Valley Caldera Area (Farrar, Et Al.,  

Open Energy Info (EERE)

source source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Page Edit History Facebook icon Twitter icon » Static Temperature Survey At Long Valley Caldera Area (Farrar, Et Al., 2003) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Static Temperature Survey At Long Valley Caldera Area (Farrar, Et Al., 2003) Exploration Activity Details Location Long Valley Caldera Area Exploration Technique Static Temperature Survey Activity Date Usefulness useful DOE-funding Unknown Notes The temperature profile in LVEW consists of an upper part (within the volcanic fill) with generally conductive gradients averaging about 35degrees C/km. Within the underlying metamorphic basement, however,

31

Static Temperature Survey At Long Valley Caldera Area (Hurwitz, Et Al.,  

Open Energy Info (EERE)

Long Valley Caldera Area (Hurwitz, Et Al., Long Valley Caldera Area (Hurwitz, Et Al., 2010) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Static Temperature Survey At Long Valley Caldera Area (Hurwitz, Et Al., 2010) Exploration Activity Details Location Long Valley Caldera Area Exploration Technique Static Temperature Survey Activity Date Usefulness useful DOE-funding Unknown Notes At shallow depths in the caldera References Shaul Hurwitz, Christopher D. Farrar, Colin F. Williams (2010) The Thermal Regime In The Resurgent Dome Of Long Valley Caldera, California- Inferences From Precision Temperature Logs In Deep Wells Retrieved from "http://en.openei.org/w/index.php?title=Static_Temperature_Survey_At_Long_Valley_Caldera_Area_(Hurwitz,_Et_Al.,_2010)&oldid=511152"

32

Static Temperature Survey At Lassen Volcanic National Park Area (Janik &  

Open Energy Info (EERE)

source source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Page Edit History Facebook icon Twitter icon » Static Temperature Survey At Lassen Volcanic National Park Area (Janik & Mclaren, 2010) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Static Temperature Survey At Lassen Volcanic National Park Area (Janik & Mclaren, 2010) Exploration Activity Details Location Lassen Volcanic National Park Area Exploration Technique Static Temperature Survey Activity Date Usefulness useful DOE-funding Unknown Notes In 1978, the Walker "O" No. 1 well at Terminal Geyser was drilled to 1222 m, all in volcanic rocks (Beall, 1981). Temperature-log profiles made 10

33

Estimation of static formation temperatures in geothermal wells by using an artificial neural network approach  

Science Conference Proceedings (OSTI)

An artificial neural network (ANN) approach was used to develop a new predictive model for the calculation of static formation temperature (SFT) in geothermal wells. A three-layer ANN architecture was successfully trained using a geothermal borehole ... Keywords: Artificial intelligence, Borehole drilling, Bottom-hole temperature, Geothermal energy, Horner method, Levenberg-Marquardt algorithm, Shut-in time

A. Bassam; E. Santoyo; J. Andaverde; J. A. Hernndez; O. M. Espinoza-Ojeda

2010-09-01T23:59:59.000Z

34

Static Temperature Survey At Fort Bliss Area (Combs, Et Al., 1999) | Open  

Open Energy Info (EERE)

Fort Bliss Area (Combs, Et Al., 1999) Fort Bliss Area (Combs, Et Al., 1999) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Static Temperature Survey At Fort Bliss Area (Combs, Et Al., 1999) Exploration Activity Details Location Fort Bliss Area Exploration Technique Static Temperature Survey Activity Date Usefulness not indicated DOE-funding Unknown Notes Three principal types of data were obtained from this drilling project: core samples of the lithology penetrated by the holes, records of drilling behavior (such as water level in the hole, changes in rate of penetration etc.), and multiple temperature logs (both during and after drilling) in each well. A suite of geophysical logs (gamma ray, neutron, sonic, and resistivity) was also run after completion of drilling.

35

Static Temperature Survey At Medicine Lake Area (Warpinski, Et Al., 2002) |  

Open Energy Info (EERE)

Medicine Lake Area (Warpinski, Et Al., 2002) Medicine Lake Area (Warpinski, Et Al., 2002) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Static Temperature Survey At Medicine Lake Area (Warpinski, Et Al., 2002) Exploration Activity Details Location Medicine Lake Area Exploration Technique Static Temperature Survey Activity Date Usefulness useful DOE-funding Unknown Notes The Glass Mountain region of northern California, which is considered to be one of the sites of the greatest untapped geothermal potential in the lower 48 states, is the focus of an exploration project to identify the characteristics of the resource at the Fourmile Hill location (northwest of Medicine Lake in T44N R3E). The objective of Phase I work was to deepen a temperature gradient well to finalize the assessment of the site. The

36

Static Temperature Survey At Long Valley Caldera Area (Sorey, Et Al., 1991)  

Open Energy Info (EERE)

Long Valley Caldera Area (Sorey, Et Al., 1991) Long Valley Caldera Area (Sorey, Et Al., 1991) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Static Temperature Survey At Long Valley Caldera Area (Sorey, Et Al., 1991) Exploration Activity Details Location Long Valley Caldera Area Exploration Technique Static Temperature Survey Activity Date Usefulness useful DOE-funding Unknown Notes Discusses temperature and lithologic data from a dozen or so wells drilled, both by industry and the scientific community. At shallow depths in the caldera References Michael L. Sorey, Gene A. Suemnicht, Neil C. Sturchio, Gregg A. Nordquist (1991) New Evidence On The Hydrothermal System In Long Valley Caldera, California, From Wells, Fluid Sampling, Electrical Geophysics, And Age Determinations Of Hot-Spring Deposits

37

Static Temperature Survey At San Andreas Region (Williams, Et Al., 2004) |  

Open Energy Info (EERE)

San Andreas Region (Williams, Et Al., 2004) San Andreas Region (Williams, Et Al., 2004) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Static Temperature Survey At San Andreas Region (Williams, Et Al., 2004) Exploration Activity Details Location San Andreas Geothermal Region Exploration Technique Static Temperature Survey Activity Date Usefulness useful regional reconnaissance DOE-funding Unknown Notes As part of an ongoing effort to investigate the thermal regime of California basins, the USGS has measured heat flow in idle oil and gas wells throughout the state. (Details and references on the published data presented in this paper can be found in the USGS heat flow database for California online at http://quake.wr.usgs.gov/heatflow/. Major references are Sass et al., 1971, Lachenbruch and Sass, 1980, DeRito et al., 1988, and

38

Static Temperature Survey At Newberry Caldera Area (Combs, Et Al., 1999) |  

Open Energy Info (EERE)

Newberry Caldera Area Newberry Caldera Area (Combs, Et Al., 1999) Exploration Activity Details Location Newberry Caldera Area Exploration Technique Static Temperature Survey Activity Date Usefulness useful DOE-funding Unknown Notes Downhole data collection during this operation was primarily limited to temperature measurements. These temperature logs were taken with Sandia's platinum-resistance-thermometer (PRT) tool which along with a Sandia logging truck remained on-site for the entire project. This instrument uses a simple resistance bridge, with changes in resistance measured from the surface through a four-conductor cable. Since there are no downhole electronics, temperature drift with time is negligible and the PRT temperature measurements are considered a reference standard for this kind

39

ANALYSIS OF THE PHENOMENON OF CREEP ON THE BASIS OF STATIC TESTS FOR TENSION  

SciTech Connect

Using a machine for static testing, a study was made of the influence of the method and rate of loading on the course of the creep curve. A metallic specimen was subjected first to static tests for tension up to a certain value of the load, and then to a test for creep at a constant load. The speed of tension of the specimen in the initial phase preceding the creep of the metal, as well as the value of the constant load which determines the start of the creep phenomenon, were varied. The duration of the initial phase fluctuates from 16 minutes to nine days, and the tests for creep proper averaged two days each. The values of the elongations and loads obtained in this manner and recorded as functions of the time were used to calculate the stress, the hardening, and the speed of deformation for all creep tests.

Wantuchowski, J.

1958-01-01T23:59:59.000Z

40

2009 ASME WIND ENERGY SYMPOSIUM Static and Fatigue Testing of Thick Adhesive Joints for  

E-Print Network (OSTI)

1 2009 ASME WIND ENERGY SYMPOSIUM Static and Fatigue Testing of Thick Adhesive Joints for Wind as wind blade size has increased. Typical blade joints use paste adhesives several millimeters thick aircraft, which are also of relevance to wind blades in many instances. The strengths of lap-shear and many

Note: This page contains sample records for the topic "test static temperature" 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

EQUIPMENT FOR HARDNESS TESTING AT ELEVATED TEMPERATURES  

SciTech Connect

The design and testing procedures of two elevatedtemperature hardness testers are described. One device uses a Rockwell tester with a large vertical capacity and a load range of 15 to 150 kg. The tester is equipped with a 900 deg C heating chamber which maintains an argon atmosphere over the specimen and can be laterally displaced by a cross-feed mechanism to allow repeated hardness readings to be made on the same specimen. The second instrument is a microindentation hardness tester for hardness determinations to a maximum temperature of 1000 deg C in vacuum of 10/sup -4/ to 10/sup -5/ torr. A deadweight loading system with a 136-deg diamond pyramid (Vickers) indenter, capable of delivering static loads between 0.150 and 3 kg, is contained within the vacuum chamber to avoid calibration problems that arise when loads are applied from outside the vacuum system. The microindentation hardness tester allows up to 100 determinations to be made on a single specimen without opening the test chamber. The applicability of the testers is illustrated by elevatedtemperature hardness measurements on several commercial alloys, a group of niobium-vanadium alloys, and by the changes in hardness occurring at the transformation temperatures of iron and steel. Hardness values of Haynes alloy No. 25 were determined at the temperatures of aging and are shown to be different from those obtained with the customary method of investigating age hardening. The testing is currently being used to aid and accelerate the development of alloys with desirable high-temperature properties. (auth)

Hallerman, G.; Gray, R.J.

1963-07-31T23:59:59.000Z

42

High Temperature Corrosion Test Facilities and High Pressure Test  

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

High Temperature High Temperature Corrosion Test Facilities and High Pressure Test Facilities for Metal Dusting Test Facilities for Metal Dusting Overview Other Facilities Work with Argonne Contact us For Employees Site Map Help Join us on Facebook Follow us on Twitter NE on Flickr High Temperature Corrosion Test Facilities and High Pressure Test Facilities for Metal Dusting Six corrosion test facilities and two thermogravimetric systems for conducting corrosion tests in complex mixed gas environments, in steam and in the presence of deposits, and five facilities for metal dusting degradation Bookmark and Share The High Temperature Corrosion Test Facilities and High Pressure Test Facilities for Metal Dusting include: High Pressure Test Facility for Metal Dusting Resistance:

43

Plasma-Catalysis During Temperature Transient Testing  

DOE Green Energy (OSTI)

A combination of catalysts is used together with nonthermal plasma in simulated diesel exhaust, while the gas temperature is varied. The catalysts both store and convert pollutants. As a result, pollutant concentrations during temperature ramps are different than those at steady state conditions. The data are presented for plasma followed by BaY, alumina, and Pt catalysts in simulated exhaust. When temperature ramps from high to low, apparent NOx conversion is quite high. However, when temperature is ramped from low to high, lower apparent conversions are seen. In a typical test cycle, average NOx conversion between 100 and 400 C is 60%. Peak conversion during the down ramp is over 90%, and minimum conversion during the up ramp is 30%. The composition of the effluent gas also varies during the temperature cycle. Intermediates such as methyl nitrate and hydrogen cyanide are not present following the combination of catalysts.

Hoard, John

2001-08-05T23:59:59.000Z

44

Static quark free energies at finite temperature with two flavors of improved Wilson quarks  

E-Print Network (OSTI)

Polyakov loop correlations at finite temperature in two-flavor QCD are studied in lattice simulations with the RG-improved gluon action and the clover-improved Wilson quark action. From the simulations on a $16^3 \\times 4$ lattice, we extract the free energies, the effective running coupling $g_{\\rm eff}(T)$ and the Debye screening mass $m_D(T)$ for various color channels of heavy quark--quark and quark--anti-quark pairs above the critical temperature. The free energies are well approximated by the screened Coulomb form with the appropriate Casimir factors. The magnitude and the temperature dependence of the Debye mass are compared to those of the next-to-leading order thermal perturbation theory and to a phenomenological formula given in terms of $g_{\\rm eff}(T)$. Also we made a comparison between our results with the Wilson quark and those with the staggered quark previously reported.

Y. Maezawa; S. Ejiri; T. Hatsuda; N. Ishii; N. Ukita; S. Aoki; K. Kanaya

2006-10-02T23:59:59.000Z

45

Low Temperature Waste Immobilization Testing Vol. I  

SciTech Connect

The Pacific Northwest National Laboratory (PNNL) is evaluating low-temperature technologies to immobilize mixed radioactive and hazardous waste. Three waste formsalkali-aluminosilicate hydroceramic cement, Ceramicrete phosphate-bonded ceramic, and DuraLith alkali-aluminosilicate geopolymerwere selected through a competitive solicitation for fabrication and characterization of waste-form properties. The three contractors prepared their respective waste forms using simulants of a Hanford secondary waste and Idaho sodium bearing waste provided by PNNL and characterized their waste forms with respect to the Toxicity Characteristic Leaching Procedure (TCLP) and compressive strength. The contractors sent specimens to PNNL, and PNNL then conducted durability (American National Standards Institute/American Nuclear Society [ANSI/ANS] 16.1 Leachability Index [LI] and modified Product Consistency Test [PCT]) and compressive strength testing (both irradiated and as-received samples). This report presents the results of these characterization tests.

Russell, Renee L.; Schweiger, Michael J.; Westsik, Joseph H.; Hrma, Pavel R.; Smith, D. E.; Gallegos, Autumn B.; Telander, Monty R.; Pitman, Stan G.

2006-09-14T23:59:59.000Z

46

Testing of an Emitter Turn-Off-Based Static Synchronous Compensator (STATCOM) Controller with Real-Time Digital Simulation  

Science Conference Proceedings (OSTI)

In this report, the testing of a controller for a 10-MVAR emitter turn-off (ETO) static VAR compensator (STATCOM) through hardware-in-the-loop simulation is described. As the STATCOM was initially intended to be placed near a 50-MW wind farm within the Bonneville Power Administration (BPA) system, the wind farm, STATCOM, and relevant portions of the utility system were modeled for a real-time simulator at the Center for Advanced Power Systems (CAPS) at Florida State University. Data for validation of the...

2010-01-20T23:59:59.000Z

47

Test of the Fixed Anvil Temperature Hypothesis  

Science Conference Proceedings (OSTI)

The fixed anvil temperature (FAT) hypothesis is examined based on the Aqua Moderate Resolution Imaging Spectroradiometer (MODIS)-based cloud-top temperature (CTT) in conjunction with the tropical atmospheric profiles and sea surface temperature (...

Yue Li; Ping Yang; Gerald R. North; Andrew Dessler

2012-07-01T23:59:59.000Z

48

Static load cycle testing of a low-aspect-ratio four-inch wall, TRG-type structure, TRG-5-4 (1. 0, 0. 56)  

SciTech Connect

This report is the second in a series of test reports that details the quasi-static cyclic testing of low height-to-length aspect ratio reinforced concrete structures. The test structures were designed according to the recommendations of a technical review group for the US Nuclear Regulatory Commission sponsored Seismic Category I Structures Program. The structure tested and reported here had 4-in.-thick shear and end walls, and the elastic deformation was dominated by shear. The background of the program and previous results are given for completeness. Details of the geometry, material property tests, construction history, ultrasonic testing, and modal testing to find the undamaged dynamic characteristics of the structures are given. Next, the static test procedure and results in terms of stiffness and load deformation behavior are given. Finally, results are shown relative to other known results, and conclusions are presented. 33 refs., 140 figs., 13 tabs.

Farrar, C.R.; Bennett, J.G.; Dunwoody, W.E. (Los Alamos National Lab., NM (USA)); Baker, W.E. (New Mexico Univ., Albuquerque, NM (USA))

1990-11-01T23:59:59.000Z

49

Rectifier cabinet static breaker  

Science Conference Proceedings (OSTI)

A rectifier cabinet static breaker replaces a blocking diode pair with an SCR and the installation of a power transistor in parallel with the latch contactor to commutate the SCR to the off state. The SCR serves as a static breaker with fast turnoff capability providing an alternative way of achieving reactor scram in addition to performing the function of the replaced blocking diodes. The control circuitry for the rectifier cabinet static breaker includes on-line test capability and an LED indicator light to denote successful test completion. Current limit circuitry provides high-speed protection in the event of overload. 7 figs.

Costantino, R.A. Jr; Gliebe, R.J.

1992-09-01T23:59:59.000Z

50

Rectifier cabinet static breaker  

DOE Patents (OSTI)

A rectifier cabinet static breaker replaces a blocking diode pair with an SCR and the installation of a power transistor in parallel with the latch contactor to commutate the SCR to the off state. The SCR serves as a static breaker with fast turnoff capability providing an alternative way of achieving reactor scram in addition to performing the function of the replaced blocking diodes. The control circuitry for the rectifier cabinet static breaker includes on-line test capability and an LED indicator light to denote successful test completion. Current limit circuitry provides high-speed protection in the event of overload.

Costantino, Jr, Roger A. (Mifflin, PA); Gliebe, Ronald J. (Library, PA)

1992-09-01T23:59:59.000Z

51

A Test for Nonlinearity in Temperature Proxy Records  

Science Conference Proceedings (OSTI)

Are temperature proxy records linear recorders of past temperature conditions? A statistical test for linearity is applied to 15 millennial-long proxy records with an annual resolution that was shown to significantly respond to Northern Hemisphere ...

Brd Stve; Fredrik Charpentier Ljungqvist; Peter Thejll

2012-10-01T23:59:59.000Z

52

Vibration Combined High Temperature Cycle Tests for Capacitive MEMS Accelerometers  

E-Print Network (OSTI)

In this paper vibration combined high temperature cycle tests for packaged capacitive SOI-MEMS accelerometers are presented. The aim of these tests is to provide useful Design for Reliability information for MEMS designers. A high temperature test chamber and a chopper-stabilized read-out circuitry were designed and realized at BME - DED. Twenty thermal cycles of combined Temperature Cycle Test and Fatigue Vibration Test has been carried out on 5 samples. Statistical evaluation of the test results showed that degradation has started in 3 out of the 5 samples.

Szucs, Z; Hodossy, S; Rencz, M; Poppe, A

2008-01-01T23:59:59.000Z

53

Vibration Combined High Temperature Cycle Tests for Capacitive MEMS Accelerometers  

E-Print Network (OSTI)

In this paper vibration combined high temperature cycle tests for packaged capacitive SOI-MEMS accelerometers are presented. The aim of these tests is to provide useful Design for Reliability information for MEMS designers. A high temperature test chamber and a chopper-stabilized read-out circuitry were designed and realized at BME - DED. Twenty thermal cycles of combined Temperature Cycle Test and Fatigue Vibration Test has been carried out on 5 samples. Statistical evaluation of the test results showed that degradation has started in 3 out of the 5 samples.

Z. Szucs; G. Nagy; S. Hodossy; M. Rencz; A. Poppe

2008-01-07T23:59:59.000Z

54

High temperature sodium testing of the CRBR prototype primary pump  

Science Conference Proceedings (OSTI)

Qualification testing in sodium of the CRBR primary pump was conducted through 1982. This paper presents an overview of the test program, a description of the Sodium Pump Test Facility (largest of its kind in the world), a brief description of the test article and summary overview of results. Of special interest were the high temperature gas convection tests and the extensive flow/speed control (dynamic) tests. Special innovative test methods were employed to investigate these phenomena.

Tessier, M.J.; Grimaldi, J.L.

1983-01-01T23:59:59.000Z

55

High-pressure/high-temperature gas-solubility study in hydrogen-phenanthrene and methane-phenanthrene systems using static and chromatographic techniques  

SciTech Connect

The design and discovery of sources for alternative energy such as coal liquefaction has become of major importance over the past two decades. One of the major problems in such design in the lack of available data, particularly, for gas solubility in polycyclic aromatics at high temperature and pressure. Static and gas-liquid partition chromatographic methods were used for the study of hydrogen-phenanthrene and methane-phenanthrene systems. The static data for these two binaries were taken along 398.2, 423.2, 448.2, and 473.2 K isotherms up to 25.23 MPa. Gas-liquid partition chromatography was used to study the infinite dilution behavior of methane, ethane, propane, n-butane, and carbon dioxide in the hydrogen-phenanthrene system as well as hydrogen, ethane, n-butane, and carbon dioxide in the methane-phenanthrene binary. The principle objective was to examine the role of the elution gas. Temperatures were along the same isotherms as the static data and up to 20.77 MPa. With the exception of carbon dioxide, Henry's constants were calculated for all systems. Expressions for the heat of solution as a function of pressure were derived for both binary and chromatographic data. Estimates of delta H/sub i/sup sol/ at high pressure were presented.

Malone, P.V.

1987-01-01T23:59:59.000Z

56

Relationship of the Variances of Temperature and Velocity to Atmospheric Static StabilityApplication to Radar and Acoustic Sounding  

Science Conference Proceedings (OSTI)

The relationship between the variances of temperature and vertical velocity fluctuations is examined experimentally and theoretically. Comparison of the variance data and the mean gradient data recorded on the 300 m tower at the Boulder ...

Earl E. Gossard; A. Shelby Frisch

1987-08-01T23:59:59.000Z

57

Results of PBX 9501 and PBX 9502 Round-Robin Quasi-Static Tension Tests from JOWOG-9/39 Focused Exchange.  

Science Conference Proceedings (OSTI)

A round-robin study was conducted with the participation of three laboratory facilities: Los Alamos National Laboratory (LANL), BWXT Pantex Plant (PX), and Lawrence Livermore National Laboratory (LLNL). The study involved the machining and quasi-static tension testing of two plastic-bonded high explosive (PBX) composites, PBX 9501 and PBX 9502. Nine tensile specimens for each type of PBX were to be machined at each of the three facilities; 3 of these specimens were to be sent to each of the participating materials testing facilities for tensile testing. The resultant data was analyzed to look for trends associated with specimen machining location and/or trends associated with materials testing location. The analysis provides interesting insights into the variability and statistical nature of mechanical properties testing on PBX composites. Caution is warranted when results are compared/exchanged between testing facilities.

Thompson, D. G. (Darla G.)

2002-01-01T23:59:59.000Z

58

TEMPERATURE DEPENDANT BEHAVIOUR OBSERVED IN THE AFIP-6 IRRADIATION TEST  

Science Conference Proceedings (OSTI)

The AFIP-6 test assembly was irradiated for one cycle in the Advanced Test Reactor at Idaho National Laboratory. The experiment was designed to test two monolithic fuel plates at power and burn-ups which bounded the operating conditions of both ATR and HFIR driver fuel. Both plates contained a solid U-Mo fuel foil with a zirconium diffusion barrier between 6061-aluminum cladding plates bonded by hot isostatic pressing. The experiment was designed with an orifice to restrict the coolant flow in order to obtain prototypic coolant temperature conditions. While these coolant temperatures were obtained, the reduced flow resulted in a sufficiently low heat transfer coefficient that failure of the fuel plates occurred. The increased fuel temperature led to significant variations in the fission gas retention behaviour of the U-Mo fuel. These variations in performance are outlined herein.

A. B. Robinson; D. M. Wachs; P. Medvedev; S.J. Miller; F. J. Rice; M. K. Meyer; D. M. Perez

2012-03-01T23:59:59.000Z

59

Accelerated Aging Test of High-Temperature Conductor and Connectors  

Science Conference Proceedings (OSTI)

As part of the research on high-temperature low-sag (HTLS) advanced conductors, this project investigates the long-term performance of commercially available advanced conductors to complement the field demonstration project, which provided information on handling and stringing of these conductors. The report provides preliminary results from the accelerated aging tests conducted on various types of HTLS conductors and their connectors. The objective of the accelerated aging tests is to determine the ...

2012-12-12T23:59:59.000Z

60

Impact Testing of Stainless Steel Material at Cold Temperatures  

SciTech Connect

Stainless steels are used for the construction of numerous spent nuclear fuel or radioactive material containers that may be subjected to high strains and moderate strain rates during accidental drop events. Mechanical characteristics of these base materials and their welds under dynamic loads in the strain rate range of concern are not well documented. However, a previous paper [1] reported on impact testing and analysis results performed at the Idaho National Laboratory using 304/304L and 316/316L stainless steel base material specimens at room and elevated temperatures. The goal of the work presented herein is to add recently completed impact tensile testing results at -20 degrees F conditions for dual-marked 304/304L and 316/316L stainless steel material specimens (hereafter referred to as 304L and 316L, respectively). Recently completed welded material impact testing at -20 degrees F, room, 300 degrees F, and 600 degrees F is also reported. Utilizing a drop-weight impact test machine and 1/4-inch to 1/2-inch thick dog-bone shaped test specimens, the impact tests achieved strain rates in the 4 to 40 per second range, depending upon the material temperature. Elevated true stress-strain curves for these materials reflecting varying strain rates and temperatures are presented herein.

Spencer D. Snow; D. Keith Morton; Robert K. Blandford

2008-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "test static temperature" 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

MECHANICAL TEST LAB CAPABILITIES  

E-Print Network (OSTI)

MECHANICAL TEST LAB CAPABILITIES · Static and cyclic testing (ASTM and non-standard) · Impact drop testing · Slow-cycle fatigue testing · High temperature testing to 2500°F · ASTM/ Boeing/ SACMA standard testing · Ability to design and fabricate non-standard test fixtures and perform non-standard tests

62

High-temperature turbine technology program hot-gas path development test. Part II. Testing  

SciTech Connect

This topical report of the US Department of Energy High-Temperature Turbine Technology (DOE-HTTT) Phase II program presents the results of testing full-scale water-cooled first-stage and second-stage turbine nozzles at design temperature and pressure to verify that the designs are adequate for operation in a full-scale turbine environment. Low-cycle fatigue life of the nozzles was demonstrated by subjecting cascade assemblies to several hundred simulated startup/shutdown turbine cycles. This testing was accomplished in the Hot-Gas Path Development Test Stand (HGPDTS), which is capable of evaluating full-scale combustion and turbine nozzle components. A three-throat cascade of the first-stage turbine nozzle was successfully tested at a nozzle inlet gas temperature of 2630/sup 0/F and a nozzle inlet pressure of 11.3 atmospheres. In addition to steady-state operation at the design firing temperature, the nozzle cascade was exposed to a simulated startup/shutdown turbine cycle by varying the firing temperature. A total of 42 h at the design point and 617 thermal cycles were accumulated during the test periods. First-stage nozzle test results show that measured metal and coolant temperatures correspond well to the predicted design values. This nozzle design has been shown to be fully satisfactory for the application (2600/sup 0/F), with growth capability to 3000/sup 0/F firing temperature. A post-test metallurgical examination of sectioned portions of the tested nozzles shows a totally bonded structure, confirming the test results and attesting to the successful performance of water-cooled composite nozzle hardware.

Horner, M.W.

1982-03-01T23:59:59.000Z

63

Pretest Caluculations of Temperature Changes for Field Thermal Conductivity Tests  

Science Conference Proceedings (OSTI)

A large volume fraction of the potential monitored geologic repository at Yucca Mountain may reside in the Tptpll (Tertiary, Paintbrush Group, Topopah Spring Tuff, crystal poor, lower lithophysal) lithostratigraphic unit. This unit is characterized by voids, or lithophysae, which range in size from centimeters to meters. A series of thermal conductivity field tests are planned in the Enhanced Characterization of the Repository Block (ECRB) Cross Drift. The objective of the pretest calculation described in this document is to predict changes in temperatures in the surrounding rock for these tests for a given heater power and a set of thermal transport properties. The calculation can be extended, as described in this document, to obtain thermal conductivity, thermal capacitance (density x heat capacity, J {center_dot} m{sup -3} {center_dot} K{sup -1}), and thermal diffusivity from the field data. The work has been conducted under the ''Technical Work Plan For: Testing and Monitoring'' (BSC 2001). One of the outcomes of this analysis is to determine the initial output of the heater. This heater output must be sufficiently high that it will provide results in a reasonably short period of time (within several weeks or a month) and be sufficiently high that the heat increase is detectable by the instruments employed in the test. The test will be conducted in stages and heater output will be step increased as the test progresses. If the initial temperature is set too high, the experiment will not have as many steps and thus fewer thermal conductivity data points will result.

N.S. Brodsky

2002-07-17T23:59:59.000Z

64

Development and Testing of High-Temperature Solar Selective Coatings  

DOE Green Energy (OSTI)

The Solar Energy Technologies Program is working to reduce the cost of parabolic trough solar power technology. System studies show that increasing the operating temperature of the solar field from 390 to >450 C will result in improved performance and cost reductions. This requires the development of new more-efficient selective coatings that have both high solar absorptance (>0.96) and low thermal emittance (<0.07) and are thermally stable above 450 C, ideally in air. Potential selective coatings were modeled, identified for laboratory prototyping, and manufactured at NREL. Optimization of the samples and high-temperature durability testing will be performed. Development of spectrally selective materials depends on reliable characterization of their optical properties. Protocols for testing the thermal/optical properties of selective coatings were developed and a round-robin experiment was conducted to verify and document the reflectance and high-temperature emittance measurements. The development, performance, and durability of these materials and future work will be described.

Kennedy, C.; Price, H.

2005-01-01T23:59:59.000Z

65

High Temperature Calcination - MACT Upgrade Equipment Pilot Plant Test  

SciTech Connect

About one million gallons of acidic, hazardous, and radioactive sodium-bearing waste are stored in stainless steel tanks at the Idaho Nuclear Technology and Engineering Center (INTEC), which is a major operating facility of the Idaho National Engineering and Environmental Laboratory. Calcination at high-temperature conditions (600 C, with alumina nitrate and calcium nitrate chemical addition to the feed) is one of four options currently being considered by the Department of Energy for treatment of the remaining tank wastes. If calcination is selected for future processing of the sodium-bearing waste, it will be necessary to install new off-gas control equipment in the New Waste Calcining Facility (NWCF) to comply with the Maximum Achievable Control Technology (MACT) standards for hazardous waste combustors and incinerators. This will require, as a minimum, installing a carbon bed to reduce mercury emissions from their current level of up to 7,500 to <45 {micro}g/dscm, and a staged combustor to reduce unburned kerosene fuel in the off-gas discharge to <100 ppm CO and <10 ppm hydrocarbons. The staged combustor will also reduce NOx concentrations of about 35,000 ppm by 90-95%. A pilot-plant calcination test was completed in a newly constructed 15-cm diameter calciner vessel. The pilot-plant facility was equipped with a prototype MACT off-gas control system, including a highly efficient cyclone separator and off-gas quench/venturi scrubber for particulate removal, a staged combustor for unburned hydrocarbon and NOx destruction, and a packed activated carbon bed for mercury removal and residual chloride capture. Pilot-plant testing was performed during a 50-hour system operability test January 14-16, followed by a 100-hour high-temperature calcination pilot-plant calcination run January 19-23. Two flowsheet blends were tested: a 50-hour test with an aluminum-to-alkali metal molar ratio (AAR) of 2.25, and a 50-hour test with an AAR of 1.75. Results of the testing indicate that sodium-bearing waste can be successfully calcined at 600 C with an AAR of 1.75. Unburned hydrocarbons are reduced to less than 10 ppm (7% O2, dry basis), with >90% reduction of NOx emissions. Mercury removal by the carbon bed reached 99.99%, surpassing the control efficiency needed to meet MACT emissions standards. No deleterious impacts on the carbon bed were observed during the tests. The test results imply that upgrading the NWCF calciner with a more efficient cyclone separator and the proposed MACT equipment can process the remaining tanks wastes in 3 years or less, and comply with the MACT standards.

Richard D. Boardman; B. H. O& #39; Brien; N. R. Soelberg; S. O. Bates; R. A. Wood; C. St. Michel

2004-02-01T23:59:59.000Z

66

Standard Test Method for Normal Spectral Emittance at Elevated Temperatures  

E-Print Network (OSTI)

1.1 This test method describes a highly accurate technique for measuring the normal spectral emittance of electrically conducting materials or materials with electrically conducting substrates, in the temperature range from 600 to 1400 K, and at wavelengths from 1 to 35 ?m. 1.2 The test method requires expensive equipment and rather elaborate precautions, but produces data that are accurate to within a few percent. It is suitable for research laboratories where the highest precision and accuracy are desired, but is not recommended for routine production or acceptance testing. However, because of its high accuracy this test method can be used as a referee method to be applied to production and acceptance testing in cases of dispute. 1.3 The values stated in SI units are to be regarded as the standard. The values in parentheses are for information only. 1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this stan...

American Society for Testing and Materials. Philadelphia

1972-01-01T23:59:59.000Z

67

Test of modified BCS model at finite temperature  

E-Print Network (OSTI)

A recently suggested modified BCS (MBCS) model has been studied at finite temperature. We show that this approach does not allow the existence of the normal (non-superfluid) phase at any finite temperature. Other MBCS predictions such as a negative pairing gap, pairing induced by heating in closed-shell nuclei, and ``superfluid -- super-superfluid'' phase transition are discussed also. The MBCS model is tested by comparing with exact solutions for the picket fence model. Here, severe violation of the internal symmetry of the problem is detected. The MBCS equations are found to be inconsistent. The limit of the MBCS applicability has been determined to be far below the ``superfluid -- normal'' phase transition of the conventional FT-BCS, where the model performs worse than the FT-BCS.

V. Yu. Ponomarev; A. I. Vdovin

2005-08-24T23:59:59.000Z

68

Standard Test Method for Saltwater Pressure Immersion and Temperature Testing of Photovoltaic Modules for Marine Environments  

E-Print Network (OSTI)

1.1 This test method provides a procedure for determining the ability of photovoltaic modules to withstand repeated immersion or splash exposure by seawater as might be encountered when installed in a marine environment, such as a floating aid-to-navigation. A combined environmental cycling exposure with modules repeatedly submerged in simulated saltwater at varying temperatures and under repetitive pressurization provides an accelerated basis for evaluation of aging effects of a marine environment on module materials and construction. 1.2 This test method defines photovoltaic module test specimens and requirements for positioning modules for test, references suitable methods for determining changes in electrical performance and characteristics, and specifies parameters which must be recorded and reported. 1.3 This test method does not establish pass or fail levels. The determination of acceptable or unacceptable results is beyond the scope of this test method. 1.4 The values stated in SI units are to be ...

American Society for Testing and Materials. Philadelphia

2010-01-01T23:59:59.000Z

69

Test Results From The Idaho National Laboratory 15kW High Temperature Electrolysis Test Facility  

DOE Green Energy (OSTI)

A 15kW high temperature electrolysis test facility has been developed at the Idaho National Laboratory under the United States Department of Energy Nuclear Hydrogen Initiative. This facility is intended to study the technology readiness of using high temperature solid oxide cells for large scale nuclear powered hydrogen production. It is designed to address larger-scale issues such as thermal management (feed-stock heating, high temperature gas handling, heat recuperation), multiple-stack hot zone design, multiple-stack electrical configurations, etc. Heat recuperation and hydrogen recycle are incorporated into the design. The facility was operated for 1080 hours and successfully demonstrated the largest scale high temperature solid-oxide-based production of hydrogen to date.

Carl M. Stoots; Keith G. Condie; James E. O'Brien; J. Stephen Herring; Joseph J. Hartvigsen

2009-07-01T23:59:59.000Z

70

Pressure testing of a high temperature naturally fractured reservoir  

DOE Green Energy (OSTI)

Los Alamos National Laboratory has conducted a number of pumping and flow-through tests at the Hot Dry Rock (HDR) test site at Fenton Hill, New Mexico. These tests consisted of injecting fresh water at controlled rates up to 12 BPM (32 l/s) and surface pressures up to 7000 psi (48 MPa) into the HDR formation at depths from 10,000 to 13,180 feet (3050 to 4000 m). The formation is a naturally fractured granite at temperatures of about 250/sup 0/C. The matrix porosity is <1% and permeability is on the order of 1 nD. Hence most of the injected fluid is believed to move through fractures. There has been no evidence of fracture breakdown phenomena, and hence it is believed that preexisting joints in the formation are opened by fluid injection. Water losses during pumping are significant, most likely resulting from flow into secondary fractures intersecting the main fluid conducting paths. The pressure-time response observed in these tests can be interpreted in terms of non-isothermal, fracture-dominated flow. As the fluid pressure increases from small values to those comparable to fracturing pressures, the formation response changes from linear fracture flow to the highly nonlinear situation where fracture lift-off occurs. A numerical heat and mass flow model was used to match the observed pressure response. Good matches were obtained for pressure buildup and shut-in data by assigning pressure dependent fracture and leak-off permeabilities. 12 refs., 5 figs., 2 tabs.

Kelkar, S.M.; Zyvoloski, G.A.; Dash, Z.V.

1986-01-01T23:59:59.000Z

71

Category:Well Testing Techniques | Open Energy Information  

Open Energy Info (EERE)

following 6 pages are in this category, out of 6 total. E Earth Tidal Analysis F Flow Test I Injectivity Test S Static Temperature Survey Stress Test T Tracer Testing Retrieved...

72

GF5 / ROBO Test or ASTM Sequence IIIGA Test, ASTM D7528 Aged Oil LowTemperature Viscosity  

E-Print Network (OSTI)

GF5 / ROBO Test or ASTM Sequence IIIGA Test, ASTM D7528 Aged Oil LowTemperature Viscosity SPECIFICATIONS PROCEDURE PARAMETERS The ROBO test is a proposed test for performance category GF.5, ASTM D7528. The ASTM Sequence IIIGA Test, ASTM D7320 may be run instead of the above. A total

Chapman, Clark R.

73

Data Acquisition for Low-Temperature Well Tests and Long-Term...  

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

ACQUISITION FOR LOW-TEMPERATURE GEOTHERMAL WELL TESTS AND LONG-TERM MONITORING DATA ACQUISITION FOR LOW-TEMPERATURE GEOTHERMAL WELL TESTS AND LONG-TERM MONITORING Prepared For:...

74

Static Seals Maintenance Guide  

Science Conference Proceedings (OSTI)

This guide provides comprehensive technical information on the understanding and maintenance of static seals. It is designed to help utility staffs maintain static seals and minimize and trouble shoot leakage problems that can reduce plant availability.

1994-09-22T23:59:59.000Z

75

High-Temperature Interlaminar Tension Test Method Development ...  

Science Conference Proceedings (OSTI)

Currently, standard test methods only address the characterization of interlaminar tensile ... This work addresses the development of a new test technique for the...

76

Scaling Studies for High Temperature Test Facility and Modular High Temperature Gas-Cooled Reactor  

SciTech Connect

The Oregon State University (OSU) High Temperature Test Facility (HTTF) is an integral experimental facility that will be constructed on the OSU campus in Corvallis, Oregon. The HTTF project was initiated, by the U.S. Nuclear Regulatory Commission (NRC), on September 5, 2008 as Task 4 of the 5-year High Temperature Gas Reactor Cooperative Agreement via NRC Contract 04-08-138. Until August, 2010, when a DOE contract was initiated to fund additional capabilities for the HTTF project, all of the funding support for the HTTF was provided by the NRC via their cooperative agreement. The U.S. Department of Energy (DOE) began their involvement with the HTTF project in late 2009 via the Next Generation Nuclear Plant (NGNP) project. Because the NRC's interests in HTTF experiments were only centered on the depressurized conduction cooldown (DCC) scenario, NGNP involvement focused on expanding the experimental envelope of the HTTF to include steady-state operations and also the pressurized conduction cooldown (PCC).

Richard R. Schult; Paul D. Bayless; Richard W. Johnson; James R. Wolf; Brian Woods

2012-02-01T23:59:59.000Z

77

Hard thermal loops in static background fields  

E-Print Network (OSTI)

We discuss the high temperature behavior of retarded thermal loops in static external fields. We employ an analytic continuation of the imaginary time formalism and use a spectral representation of the thermal amplitudes. We show that, to all orders, the leading contributions of static hard thermal loops can be directly obtained by evaluating them at zero external energies and momenta.

Brandt, F T; Siqueira, J B

2013-01-01T23:59:59.000Z

78

Deterministic Modeling of the High Temperature Test Reactor  

SciTech Connect

Idaho National Laboratory (INL) is tasked with the development of reactor physics analysis capability of the Next Generation Nuclear Power (NGNP) project. In order to examine INLs current prismatic reactor deterministic analysis tools, the project is conducting a benchmark exercise based on modeling the High Temperature Test Reactor (HTTR). This exercise entails the development of a model for the initial criticality, a 19 column thin annular core, and the fully loaded core critical condition with 30 columns. Special emphasis is devoted to the annular core modeling, which shares more characteristics with the NGNP base design. The DRAGON code is used in this study because it offers significant ease and versatility in modeling prismatic designs. Despite some geometric limitations, the code performs quite well compared to other lattice physics codes. DRAGON can generate transport solutions via collision probability (CP), method of characteristics (MOC), and discrete ordinates (Sn). A fine group cross section library based on the SHEM 281 energy structure is used in the DRAGON calculations. HEXPEDITE is the hexagonal z full core solver used in this study and is based on the Greens Function solution of the transverse integrated equations. In addition, two Monte Carlo (MC) based codes, MCNP5 and PSG2/SERPENT, provide benchmarking capability for the DRAGON and the nodal diffusion solver codes. The results from this study show a consistent bias of 23% for the core multiplication factor. This systematic error has also been observed in other HTTR benchmark efforts and is well documented in the literature. The ENDF/B VII graphite and U235 cross sections appear to be the main source of the error. The isothermal temperature coefficients calculated with the fully loaded core configuration agree well with other benchmark participants but are 40% higher than the experimental values. This discrepancy with the measurement stems from the fact that during the experiments the control rods were adjusted to maintain criticality, whereas in the model, the rod positions were fixed. In addition, this work includes a brief study of a cross section generation approach that seeks to decouple the domain in order to account for neighbor effects. This spectral interpenetration is a dominant effect in annular HTR physics. This analysis methodology should be further explored in order to reduce the error that is systematically propagated in the traditional generation of cross sections.

Ortensi, J.; Cogliati, J. J.; Pope, M. A.; Ferrer, R. M.; Ougouag, A. M.

2010-06-01T23:59:59.000Z

79

High Temperature Oxidation Testing of Reverse Infiltrated Ultra High ...  

Science Conference Proceedings (OSTI)

Fracture Criterion of Discontinuous Carbon Fiber Dispersed SiC Matrix ... Issues for the Development of Fatigue Resistant CMC at Intermediate Temperatures.

80

On the test of the modified BCS at finite temperature  

E-Print Network (OSTI)

The results and conclusions by Ponomarev and Vdovin [Phys. Rev. C {\\bf 72}, 034309 (2005)] are inadequate to judge the applicability of the modified BCS because they were obtained either in the temperature region, where the use of zero-temperature single-particle spectra is no longer justified, or in too limited configuration spaces.

Nguyen Dinh Dang; Akito Arima

2005-10-03T23:59:59.000Z

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


81

High temperature solid oxide fuel cell: Customer test units  

DOE Green Energy (OSTI)

There are three 25-kW class SOFC customer test unit programs; two are in Japan (utility joint ventures), one for Southern California Edison Co. The two in Japan are described: Startup, testing, modifications, and operational performance are discussed.

Ray, E.R.; Veyo, S.E.

1993-11-01T23:59:59.000Z

82

The Static String  

E-Print Network (OSTI)

In this article the quantum fluctuation of a rigid and static string is reported to be identical to a free quantum particle. Solutions similar to this static string have already been found in the semi-classical quantizaton of pulsating strings, and our results show that the semi-classical quantization of pulsating strings is, in some cases, a perturbation of static strings. We also interpret the energy of the static string as a lower bound for the pulsating string and speculate about a description of quantum mechanics in terms of semi-classical string theory.

Giardino, Sergio

2013-01-01T23:59:59.000Z

83

A Simulation Test of Three-Dimensional Temperature Retrievals  

Science Conference Proceedings (OSTI)

Retrieving information from remotely sensed data and analyzing the resulting geophysical parameters on a regular grid may be combined using a variational analysis method. This approach is applicable to the problem of retrieving temperature and ...

Ross N. Hoffman; Thomas Nehrkorn

1989-03-01T23:59:59.000Z

84

Infrared Thermography Measurements of Window Thermal Test Specimen Surface Temperatures  

E-Print Network (OSTI)

. Griffith ASHRAE Member, Howdy Goudey, and Dariush Arasteh P.E. ASHRAE Member Building Technologies Program. The American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) temperature conditions

85

Testing for Deterministic Trends in Global Sea Surface Temperature  

Science Conference Proceedings (OSTI)

Long-term variability in global sea surface temperature (SST) is often quantified by the slope from a linear regression fit. Attention is then focused on assessing the statistical significance of the derived slope parameter, but the adequacy of ...

Susana M. Barbosa

2011-05-01T23:59:59.000Z

86

Material test machine for tension-compression tests at high temperature  

DOE Patents (OSTI)

Apparatus providing a device for testing the properties of material specimens at high temperatures and pressures in controlled water chemistries includes, inter alia, an autoclave housing the specimen which is being tested. The specimen is connected to a pull rod which couples out of the autoclave to an external assembly which includes one or more transducers, a force balance chamber and a piston type actuator. The pull rod feeds through the force balance chamber and is compensated thereby for the pressure conditions existing within the autoclave and tending to eject the pull rod therefrom. The upper end of the push rod is connected to the actuator through elements containing a transducer comprising a linear variable differential transformer (LVDT). The housing and coil assembly of the LVDT is coupled to a tube which runs through a central bore of the pull rod into the autoclave where it is connected to one side of the specimen. The movable core of the LVDT is coupled to a stem which runs through the tube where it is then connected to the other side of the specimen through a coupling member. A transducer in the form of a load cell including one or more strain gages is located on a necked-down portion of the upper part of the pull rod intermediate the LVDT and force balance chamber.

Cioletti, Olisse C. (Pittsburgh, PA)

1988-01-01T23:59:59.000Z

87

Final safeguards analysis, High Temperature Lattice Test Reactor  

SciTech Connect

Information on the HTLTR Reactor is presented concerning: reactor site; reactor buildings; reactor kinetics and design characteristics; experimental and test facilitles; instrumentation and control; maintenance and modification; initial tests and operations; administration and procedural safeguards; accident analysis; seifterminated excursions; main heat exchanger leak; training program outline; and reliability analysis of safety systems. (7 references) (DCC)

Hanthorn, H.E.; Brown, W.W.; Clark, R.G.; Heineman, R.E.; Humes, R.M.

1966-01-01T23:59:59.000Z

88

EVALUATION OF ZERO-POWER, ELEVATED-TEMPERATURE MEASUREMENTS AT JAPANS HIGH TEMPERATURE ENGINEERING TEST REACTOR  

Science Conference Proceedings (OSTI)

The High Temperature Engineering Test Reactor (HTTR) of the Japan Atomic Energy Agency (JAEA) is a 30 MWth, graphite-moderated, helium-cooled reactor that was constructed with the objectives to establish and upgrade the technological basis for advanced high-temperature gas-cooled reactors (HTGRs) as well as to conduct various irradiation tests for innovative high-temperature research. The core size of the HTTR represents about one-half of that of future HTGRs, and the high excess reactivity of the HTTR, necessary for compensation of temperature, xenon, and burnup effects during power operations, is similar to that of future HTGRs. During the start-up core physics tests of the HTTR, various annular cores were formed to provide experimental data for verification of design codes for future HTGRs. The experimental benchmark performed and currently evaluated in this report pertains to the data available for two zero-power, warm-critical measurements with the fully-loaded HTTR core. Six isothermal temperature coefficients for the fully-loaded core from approximately 340 to 740 K have also been evaluated. These experiments were performed as part of the power-up tests (References 1 and 2). Evaluation of the start-up core physics tests specific to the fully-loaded core (HTTR-GCR-RESR-001) and annular start-up core loadings (HTTR-GCR-RESR-002) have been previously evaluated.

John D. Bess; Nozomu Fujimoto; James W. Sterbentz; Luka Snoj; Atsushi Zukeran

2011-03-01T23:59:59.000Z

89

Evaluation of Integrated High Temperature Component Testing Needs  

Science Conference Proceedings (OSTI)

This paper describes the requirements for a large-scale component test capability to support the development of advanced nuclear reactor technology and their adaptation to commercial applications that advance U.S. energy economy, reliability, and security and reduce carbon emissions.

Rafael Soto; David Duncan; Vincent Tonc

2009-05-01T23:59:59.000Z

90

Testing Methods Used for Materials at High Temperatures  

Science Conference Proceedings (OSTI)

Table 11   Typical commercial high-temperature/high-pressure service conditions...350??650 662??1202 ?10 ?100 Compressed natural gas storage Methane with trace H 2 S 0??100 32??212 ?8 ?80 Thermodynamic power generation NH 3 , H 2 O 100??650 212??1202 ?1.5??15 ?15??150 Geothermal power Brine, steam, H 2 S ?370 ?698 ?17 ?170 Steam boiler Water, steam ?300 ?572 ?9 ?90 Source: Ref 140...

91

Supercritical Boiler Tube Wall Temperature Test Base on the Power Plant Control System Database  

Science Conference Proceedings (OSTI)

In order to precisely learn the working condition of 600MW supercritical boiler, new temperature measuring points are set on the super-heater tube wall inner the flue. Since the working condition of 600MW supercritical boiler is quite severe, the temperature ... Keywords: supercritical boiler, database, temperature test, super-heater

Yu Yanzhi; Zhang Liangbo; Xu Haichuan; Chen Duogang; Dong Gongjun; Shen Bo; Liu Sheng

2010-06-01T23:59:59.000Z

92

Recently developed well test insrumentation for low-to-moderate temperature hydrothermal reservoirs  

DOE Green Energy (OSTI)

The engineering drawings, assembly instructions, and recommended usage for several of the instruments developed for low and moderate temperature (< 150/sup 0/C) hydrothermal well testing are presented. Included are the drawings for: a downhole pressure and temperature instrument, a multi-conductor cablehead, a line driver to be used with the downhole pressure and temperature instrument, and a fluid-level detector.

Solbau, R.; Goranson, C.B.; Benson, S.M.

1981-08-01T23:59:59.000Z

93

High temperature superconducting current lead test facility with heat pipe intercepts  

SciTech Connect

A high temperature superconducting (HTS) current lead test facility using heat pipe thermal intercepts is under development at the Superconducting Technology Center at Los Alamos National Laboratory. The facility can be configured for tests at currents up to 1,000 A. Mechanical cryocoolers provide refrigeration to the leads. Electrical isolation is maintained by intercepting thermal energy from the leads through cryogenic heat pipes. HST lead warm end temperature is variable from 65 K to over 90 K by controlling heat pipe evaporator temperature. Cold end temperature is variable up to 30 K. Performance predictions in terms of heat pipe evaporator temperature as a function of lead current are presented for the initial facility configuration, which supports testing up to 200 A. Measurements are to include temperature and voltage gradient in the conventional and HTS lead sections, temperature and heat transfer rate in the heat pipes. as well as optimum and off-optimum performance of the conventional lead sections.

Blumenfeld, P.E.; Prenger, C.; Roth, E.W.; Stewart, J.A.

1998-12-31T23:59:59.000Z

94

Production test IP-338-A, Supp. A, DR-Reactor heat decay test at high outlet water temperatures  

SciTech Connect

This test is identical to the original except that it authorizes the performance of a trial reduction in reactor flow during a prior reactor shutdown. This trial flow reduction will be performed in the same manner as proposed for the actual test, with one exception. This is, that based upon the results of this preliminary test some changes in the timing of the different steps may be indicated. Such changes can readily be handled by making each step dependent upon the observed reactor outlet temperature during the test performance. The other significant change in the production test is the increase in the allowable bulk outlet temperature from Ti + 40 {plus_minus} 3{degrees}C{sup *}. This change is needed to obtain a reasonable extrapolation of the results of tests No. 1 and No.2 to 90{degrees}C, and is justified from a hazards standpoint by the excellent flow control achieved during test No. 1 and by the trial test that will be run prior to the performance of the actual test No. 2. Other aspects of the test basis and justification are presented in the original production test.

Jones, S.S.

1962-05-18T23:59:59.000Z

95

Geothermal fracture stimulation technology. Volume II. High-temperature proppant testing  

DOE Green Energy (OSTI)

Data were obtained from a newly built proppant tester, operated at actual geothermal temperatures. The short term test results show that most proppants are temperature sensitive, particularly at the higher closure stresses. Many materials have been tested using a standard short-term test, i.e., fracture-free sand, bauxite, and a resin-coated sand retained good permeability at the high fluid temperatures in brine over a range of closure stresses. The tests were designed to simulate normal closure stress ranges for geothermal wells which are estimated to be from 2000 to 6000 psi. Although the ultra high closure stresses in oil and gas wells need not be considered with present geothermal resources, there is a definite need for chemically inert proppants that will retain high permeability for long time periods in the high temperature formations.

Not Available

1980-07-01T23:59:59.000Z

96

A Simple Method for Testing Brightness Temperatures from Satellite Microwave Radiometers  

Science Conference Proceedings (OSTI)

A method is proposed for testing microwave measurements from spaceborne sensors by computing collocated simulated brightness temperatures from the ECMWF numerical weather meteorological model using an atmospheric radiative transfer model and the ...

J-Y. Lojou; R. Bernard; L. Eymard

1994-04-01T23:59:59.000Z

97

TEMPERATURE MONITORING OPTIONS AVAILABLE AT THE IDAHO NATIONAL LABORATORY ADVANCED TEST REACTOR  

SciTech Connect

As part of the Advanced Test Reactor National Scientific User Facility (ATR NSUF) program, the Idaho National Laboratory (INL) has developed in-house capabilities to fabricate, test, and qualify new and enhanced sensors for irradiation testing. To meet recent customer requests, an array of temperature monitoring options is now available to ATR users. The method selected is determined by test requirements and budget. Melt wires are the simplest and least expensive option for monitoring temperature. INL has recently verified the melting temperature of a collection of materials with melt temperatures ranging from 100 to 1000 C with a differential scanning calorimeter installed at INLs High Temperature Test Laboratory (HTTL). INL encapsulates these melt wires in quartz or metal tubes. In the case of quartz tubes, multiple wires can be encapsulated in a single 1.6 mm diameter tube. The second option available to ATR users is a silicon carbide temperature monitor. The benefit of this option is that a single small monitor (typically 1 mm x 1 mm x 10 mm or 1 mm diameter x 10 mm length) can be used to detect peak irradiation temperatures ranging from 200 to 800 C. Equipment has been installed at INLs HTTL to complete post-irradiation resistivity measurements on SiC monitors, a technique that has been found to yield the most accurate temperatures from these monitors. For instrumented tests, thermocouples may be used. In addition to Type-K and Type-N thermocouples, a High Temperature Irradiation Resistant ThermoCouple (HTIR-TC) was developed at the HTTL that contains commercially-available doped molybdenum paired with a niobium alloy thermoelements. Long duration high temperature tests, in furnaces and in the ATR and other MTRs, demonstrate that the HTIR-TC is accurate up to 1800 C and insensitive to thermal neutron interactions. Thus, degradation observed at temperatures above 1100 C with Type K and N thermocouples and decalibration due to transmutation with tungsten-rhenium and platinum rhodium thermocouples can be avoided. INL is also developing an Ultrasonic Thermometry (UT) capability. In addition to small size, UTs offer several potential advantages over other temperature sensors. Measurements may be made near the melting point of the sensor material, potentially allowing monitoring of temperatures up to 3000 C. In addition, because no electrical insulation is required, shunting effects are avoided. Most attractive, however, is the ability to introduce acoustic discontinuities to the sensor, as this enables temperature measurements at several points along the sensor length. As discussed in this paper, the suite of temperature monitors offered by INL is not only available to ATR users, but also to users at other MTRs.

J.E. Daw; J.L. Rempe; D.L. Knudson; T. Unruh; B.M. Chase; K.L Davis

2012-03-01T23:59:59.000Z

98

Conceptual Design for a High-Temperature Gas Loop Test Facility  

SciTech Connect

This report documents an early-stage conceptual design for a high-temperature gas test loop. The objectives accomplished by the study include, (1) investigation of existing gas test loops to determine ther capabilities and how the proposed system might best complement them, (2) development of a preliminary test plan to help identify the performance characteristics required of the test unit, (3) development of test loop requirements, (4) development of a conceptual design including process flow sheet, mechanical layout, and equipment specifications and costs, and (5) development of a preliminary test loop safety plan.

James B. Kesseli

2006-08-01T23:59:59.000Z

99

Testing the Role of Radiation in Determining Tropical Cloud-Top Temperature  

Science Conference Proceedings (OSTI)

A cloud-resolving model is used to test the hypothesis that radiative cooling by water vapor emission is the primary control on the temperature of tropical anvil clouds. The temperature of ice clouds in the simulation can be increased or decreased ...

Bryce E. Harrop; Dennis L. Hartmann

2012-09-01T23:59:59.000Z

100

Linear variable differential transformer (LVDT)-based elongation measurements in Advanced Test Reactor high temperature irradiation testing  

Science Conference Proceedings (OSTI)

New materials are being considered for fuel, cladding, and structures in next generation and existing nuclear reactors. These materials can undergo significant dimensional and physical changes during high temperature irradiations. Currently, such changes are determined by repeatedly irradiating a specimen for a specified period of time in the Advanced Test Reactor (ATR) and then removing it from the reactor for evaluation. The labor and time to remove, examine, and return irradiated samples for each measurement makes this approach very expensive. In addition, such techniques provide limited data and may disturb the phenomena of interest. To resolve these issues, an instrumented creep testing capability is being developed for specimens irradiated in pressurized water reactor (PWR) coolant conditions in the ATR at the Idaho National Laboratory (INL). This paper reports the status of INL efforts to develop this testing capability. In addition to providing an overview of in-pile creep test capabilities available at other test reactors, this paper focuses on efforts to design and evaluate a prototype test rig in an autoclave at INL's High Temperature Test Laboratory (HTTL).

D. L. Knudson; J. L. Rempe

2012-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "test static temperature" 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

Linear variable differential transformer (LVDT)-based elongation measurements in Advanced Test Reactor high temperature irradiation testing  

Science Conference Proceedings (OSTI)

New materials are being considered for fuel, cladding and structures in next generation and existing nuclear reactors. These materials can undergo significant dimensional and physical changes during high temperature irradiations. Currently, such changes are determined by repeatedly irradiating a specimen for a specified period of time in the Advanced Test Reactor (ATR) and then removing it from the reactor for evaluation. The labor and time to remove, examine and return irradiated samples for each measurement make this approach very expensive. In addition, such techniques provide limited data and may disturb the phenomena of interest. To resolve these issues, an instrumented creep testing capability is being developed for specimens irradiated under pressurized water reactor coolant conditions in the ATR at the Idaho National Laboratory (INL). This paper reports the status of INL efforts to develop this testing capability. In addition to providing an overview of in-pile creep test capabilities available at other test reactors, this paper focuses on efforts to design and evaluate a prototype test rig in an autoclave at INLs High Temperature Test Laboratory.

D. L. Knudson; J. L. Rempe

2012-02-01T23:59:59.000Z

102

Soumis J Eur. Ceram. Soc. Intermediate temperature SOFC single cell test  

E-Print Network (OSTI)

1 Soumis à J Eur. Ceram. Soc. Intermediate temperature SOFC single cell test using Nd1.95NiO4 Abstract This work deals with SOFC single cell tests using neodymium nickelate Nd1.95NiO4+ as cathode electrochemical activity with respect to classical materials. The SOFC cells were fabricated from an anode

Paris-Sud XI, Université de

103

Test report for measurement of performance vs temperature of Whittaker Electrochemical Cell  

DOE Green Energy (OSTI)

This document is the test report that summarizes the results of the tests on the Whittaker cells between the temperatures of -20{degrees}F and +120{degrees}F. These sensors are used on the Rotary Mode Core Sampling (RMCS) flammable gas interlock (FGI), to detect and quantify hydrogen gas. The test consisted of operating five Whittaker electrochemical cells in an environmental chamber that was varied in temperature from -20{degrees}F to +120{degrees}F. As the rate rise of the voltage from the cells changed, after exposure to a gas concentration of 1% hydrogen at the different temperatures, the voltage was recorded on a computer controlled data acquisition system. Analysis of the data was made to determine if the cells maximum output voltages and rise times were effected by temperature.

Vargo, G.F., Fluor Daniel Hanford

1997-02-13T23:59:59.000Z

104

Test plan for long-term, low-temperature oxidation of BWR spent fuel  

Science Conference Proceedings (OSTI)

Preliminary studies indicated the need for more spent fuel oxidation data in order to determine the probable behavior of spent fuel in a tuff repository. Long-term, low-temperature testing was recommended in a comprehensive technical approach to (1) confirm the findings of the short-term thermogravimetric analysis tests; (2) evaluate the effects of variables such as burnup, atmospheric moisture,and fuel type on the oxidation rate; and (3) extend the oxidation data base to representative repository temperatures and better define the temperature dependence of the operative oxidation mechanisms. This document presents the test plan to study the effects of atmospheric moisture and temperature on oxidation rate and phase formation using a large number of boiling-water reactor fuel samples. Tests will run for up to two years, use characterized fragmented and pulverized fuel samples, cover a temperature range of 110{degree}C to 175{degree}C, and be conducted with an atmospheric moisture content ranging from <{minus}55{degree}C to {approximately}80{degree}C dew point. After testing, the samples will be examined and made available for leaching testing. 15 refs., 2 figs., 2 tabs.

Einziger, R.E.

1988-12-01T23:59:59.000Z

105

Full-length high-temperature severe fuel damage test No. 1  

SciTech Connect

This report describes the first full-length high-temperature test (FLHT-1) performed by Pacific Northwest Laboratory (PNL) in the National Research Universal (NRU) reactor at Chalk River, Ontario, Canada. The test is part of a series of experiments being performed for the NRC as a part of their Severe Fuel Damage Program and is one of several planned for PNL`s Coolant Boilaway and Damage Progression Program. The report summarizes the test design and test plan. it also provides a summary and discussion of the data collected during the test and of the photos taken during the post-test examination. All objectives for the test were met. The key objective was to demonstrate that severe fuel damage tests on full-length fuel bundles can be safely conducted in the NRU reactor.

Rausch, W.N.; Hesson, G.M.; Pilger, J.P.; King, L.L.; Goodman, R.L.; Panisko, F.E.

1993-08-01T23:59:59.000Z

106

Hard thermal loops in static external fields  

E-Print Network (OSTI)

We study, in the imaginary-time formalism, the high temperature behavior of n-point thermal loops in static Yang-Mills and gravitational fields. We show that in this regime, any hard thermal loop gives the same leading contribution as the one obtained by evaluating the loop at zero external energies and momenta.

Frenkel, J; Takahashi, N

2009-01-01T23:59:59.000Z

107

Temperature-dependent mechanical property testing of nitrate thermal storage salts.  

DOE Green Energy (OSTI)

Three salt compositions for potential use in trough-based solar collectors were tested to determine their mechanical properties as a function of temperature. The mechanical properties determined were unconfined compressive strength, Young's modulus, Poisson's ratio, and indirect tensile strength. Seventeen uniaxial compression and indirect tension tests were completed. It was found that as test temperature increases, unconfined compressive strength and Young's modulus decreased for all salt types. Empirical relationships were developed quantifying the aforementioned behaviors. Poisson's ratio tends to increase with increasing temperature except for one salt type where there is no obvious trend. The variability in measured indirect tensile strength is large, but not atypical for this index test. The average tensile strength for all salt types tested is substantially higher than the upper range of tensile strengths for naturally occurring rock salts. Interest in raising the operating temperature of concentrating solar technologies and the incorporation of thermal storage has motivated studies on the implementation of molten salt as the system working fluid. Recently, salt has been considered for use in trough-based solar collectors and has been shown to offer a reduction in levelized cost of energy as well as increasing availability (Kearney et al., 2003). Concerns regarding the use of molten salt are often related to issues with salt solidification and recovery from freeze events. Differences among salts used for convective heat transfer and storage are typically designated by a comparison of thermal properties. However, the potential for a freeze event necessitates an understanding of salt mechanical properties in order to characterize and mitigate possible detrimental effects. This includes stress imparted by the expanding salt. Samples of solar salt, HITEC salt (Coastal Chemical Co.), and a low melting point quaternary salt were cast for characterization tests to determine unconfined compressive strength, indirect tensile strength, coefficient of thermal expansion (CTE), Young's modulus, and Poisson's ratio. Experiments were conducted at multiple temperatures below the melting point to determine temperature dependence.

Everett, Randy L.; Iverson, Brian D.; Broome, Scott Thomas; Siegel, Nathan Phillip; Bronowski, David R.

2010-09-01T23:59:59.000Z

108

Are all Quasi-static Processes Reversible?  

E-Print Network (OSTI)

A process, carried out in a stepwise manner, becomes quasi-static when the number of intermediate steps tends to infinity. Usually, the net entropy production approaches zero under this limiting condition. Hence, such cases are termed reversible. A favorite example is the introduction of an infinite number of intermediate-temperature reservoirs in between the source and the sink for a non-isothermal heat transfer process. We analyze the situation and conclude that such quasi-static processes are not reversible. Indeed, no non-isothermal heat transfer process can ever be made reversible due to an extraneous work term.

Mukhopadhyay, Debasis

2009-01-01T23:59:59.000Z

109

High temperature testing of TRUPACT-I materials: Kevlar, honeycomb, rigid polyurethane foam  

Science Conference Proceedings (OSTI)

When the Transuranic Package Transporter Model-I (TRUPACT-I) failed to afford sufficient containment after a 35-minute JP-4 fueled open-pool fire, component tests were conducted, in conjunction with analyses, to guide and assess the redesign of TRUPACT-I. Since materials which change phase or combust are difficult to numerically analyze, the component tests determined the behavior of these materials in TRUPACT-I. The component tests approximated the behavior of Kevlar (registered trademark of DuPont), metal honeycomb, and rigid polyurethane foam, as they appear in TRUPACT-I, in an open-pool fire environment. Six series of tests were performed at Sandia's Radiant Heat Facility and one test at the wind-shielded fire test facility (LAARC Chimney). Each test facility was controlled to yield temperatures or heat fluxes equivalent to those measured in the TRUPACT-I, Unit 0, open-pool fire. This extensive series of component tests (34 runs total) provided information on the high-temperature behavior of unique materials which was not previously available or otherwise attainable. The component tests were a timely and cost-effective means of providing the data for the TRUPACT-I redesign.

Hudson, M.L.

1985-12-01T23:59:59.000Z

110

Pre-test estimates of temperature decline for the LANL Fenton Hill Long-Term Flow Test  

DOE Green Energy (OSTI)

Pre-test predications for the Long-Term Flow Test (LTFT) of the experimental Hot Dry Rock (HDR) reservoir at Fenton Hill were made using two models. Both models are dependent on estimates of the ``effective`` reservoir volume accessed by the fluid and the mean fracture spacing (MFS) of major joints for fluid flow. The effective reservoir volume was estimated using a variety of techniques, and the range of values for the MFS was set through experience in modeling the thermal cooldown of other experimental HDR reservoirs. The two pre-test predictions for cooldown to 210{degrees}C (a value taken to compare the models) from initial temperature of 240{degrees}C are 6.1 and 10.7 years. Assuming that a minimum of 10{degrees}C is required to provide an unequivocal indication of thermal cooldown, both models predict that the reservoir will not exhibit observable cooldown for at least two years.

Robinson, B.A. [Los Alamos National Lab., NM (United States); Kruger, P. [Stanford Univ., CA (United States). Stanford Geothermal Program

1992-06-01T23:59:59.000Z

111

Clip gage attachment for frictionless measurement of displacement during high-temperature mechanical testing  

DOE Patents (OSTI)

An attachment for placement between a test specimen and a remote clip gage extensometer providing improved fracture toughness tests of materials at elevated temperature is described. Using a cylindrical tube and axial rod in new relationship, the device transfers the displacement signal of the fracture toughness test specimen directly to a clip gage extensometer located outside the high temperature furnace. Virtually frictionless operation is assured by having the test specimen center one end of the rod in one end of the tube, while the clip gage extensometer arms center the other end of the rod in the other end of the tube. By providing positive control over both ends of both rod and tube, the attachment may be operated in orientations other than vertical. 1 figure.

Alexander, D.J.

1994-01-04T23:59:59.000Z

112

Superheater/intermediate temperature air heater tube corrosion tests in the MHD coal fired flow facility (Montana Rosebud POC tests)  

DOE Green Energy (OSTI)

Nineteen alloys have been exposed for approximately 1000 test hours as candidate superheater and intermediate temperature air heater tubes in a U.S. DOE facility dedicated to demonstrating Proof of Concept for the bottoming or heat and seed recovery portion of coal fired magnetohydrodynamic (MHD) electrical power generating plants. Corrosion data have been obtained from a test series utilizing a western United States sub-bituminous coal, Montana Rosebud. The test alloys included a broad range of compositions ranging from carbon steel to austenitic stainless steels to high chromium nickel-base alloys. The tubes, coated with K{sub 2}SO-containing deposits, developed principally, oxide scales by an oxidation/sulfidation mechanism. In addition to being generally porous, these scales were frequently spalled and/or non-compact due to a dispersed form of outward growth by oxide precipitation in the adjacent deposit. Austenitic alloys generally had internal penetration as trans Tranular and/or intergranular oxides and sulfides. While only two of the alloys had damage visible without magnification as a result of the relatively short exposure, there was some concern about Iona-term corrosion performance owing to the relatively poor quality scales formed. Comparison of data from these tests to those from a prior series of tests with Illinois No. 6, a high sulfur bituminous coal, showed less corrosion in the present test series with the lower sulfur coal. Although K{sub 2}SO{sub 4}was the principal corrosive agent as the supplier of sulfur, which acted to degrade alloy surface scales, tying up sulfur as K{sub 2}SO{sub 4} prevented the occurrence of complex alkali iron trisulfates responsible for severe or catastrophic corrosion in conventional power plants with certain coals and metal temperatures.

White, M.

1996-01-01T23:59:59.000Z

113

Data acquisition for low-temperature geothermal well tests and long-term monitoring. Final report  

DOE Green Energy (OSTI)

Groundwater monitoring is an essential part of the development of a low-temperature geothermal field for production and injection wells. State water resource and environmental departments are requiring both geothermal well testing and long-term monitoring as a part of the permitting process for geothermal developments. This report covers water-level measurement methods, instruments used for well testing, geochemical sampling, examples of data acquisition and regulatory mandates on groundwater monitoring.

Lienau, P.J.

1992-09-01T23:59:59.000Z

114

Data acquisition for low-temperature geothermal well tests and long-term monitoring  

DOE Green Energy (OSTI)

Groundwater monitoring is an essential part of the development of a low-temperature geothermal field for production and injection wells. State water resource and environmental departments are requiring both geothermal well testing and long-term monitoring as a part of the permitting process for geothermal developments. This report covers water-level measurement methods, instruments used for well testing, geochemical sampling, examples of data acquisition and regulatory mandates on groundwater monitoring.

Lienau, P.J.

1992-09-01T23:59:59.000Z

115

MELT WIRE SENSORS AVAILABLE TO DETERMINE PEAK TEMPERATURES IN ATR IRRADIATION TESTING  

SciTech Connect

In April 2007, the Department of Energy (DOE) designated the Advanced Test Reactor (ATR) a National Scientific User Facility (NSUF) to advance US leadership in nuclear science and technology. By attracting new users from universities, laboratories, and industry, the ATR will support basic and applied nuclear research and development and help address the nation's energy security needs. In support of this new program, the Idaho National Laboratory (INL) has developed in-house capabilities to fabricate, test, and qualify new and enhanced temperature sensors for irradiation testing. Although most efforts emphasize sensors capable of providing real-time data, selected tasks have been completed to enhance sensors provided in irradiation locations where instrumentation leads cannot be included, such as drop-in capsule and Hydraulic Shuttle Irradiation System (HSIS) or 'rabbit' locations. To meet the need for these locations, the INL has developed melt wire temperature sensors for use in ATR irradiation testing. Differential scanning calorimetry and environmental testing of prototypical sensors was used to develop a library of 28 melt wire materials, capable of detecting peak irradiation temperatures ranging from 85 to 1500C. This paper will discuss the development work and present test results.

K. L. Davis; D. Knudson; J. Daw; J. Palmer; J. L. Rempe

2012-07-01T23:59:59.000Z

116

Facility Configuration Study of the High Temperature Gas-Cooled Reactor Component Test Facility  

Science Conference Proceedings (OSTI)

A test facility, referred to as the High Temperature Gas-Cooled Reactor Component Test Facility or CTF, will be sited at Idaho National Laboratory for the purposes of supporting development of high temperature gas thermal-hydraulic technologies (helium, helium-Nitrogen, CO2, etc.) as applied in heat transport and heat transfer applications in High Temperature Gas-Cooled Reactors. Such applications include, but are not limited to: primary coolant; secondary coolant; intermediate, secondary, and tertiary heat transfer; and demonstration of processes requiring high temperatures such as hydrogen production. The facility will initially support completion of the Next Generation Nuclear Plant. It will secondarily be open for use by the full range of suppliers, end-users, facilitators, government laboratories, and others in the domestic and international community supporting the development and application of High Temperature Gas-Cooled Reactor technology. This pre-conceptual facility configuration study, which forms the basis for a cost estimate to support CTF scoping and planning, accomplishes the following objectives: Identifies pre-conceptual design requirements Develops test loop equipment schematics and layout Identifies space allocations for each of the facility functions, as required Develops a pre-conceptual site layout including transportation, parking and support structures, and railway systems Identifies pre-conceptual utility and support system needs Establishes pre-conceptual electrical one-line drawings and schedule for development of power needs.

S. L. Austad; L. E. Guillen; D. S. Ferguson; B. L. Blakely; D. M. Pace; D. Lopez; J. D. Zolynski; B. L. Cowley; V. J. Balls; E.A. Harvego, P.E.; C.W. McKnight, P.E.; R.S. Stewart; B.D. Christensen

2008-04-01T23:59:59.000Z

117

SAVE: static analysis on versioning entities  

Science Conference Proceedings (OSTI)

Insufficiently tested software releases provoque a competition between 'exploiters' versus 'patchers'. Developing secure software from scratch greatly reduces maintenance effort. The integration of regular security checks combined with patch proposals ... Keywords: incremental analysis, secure software development, static analysis, version control system

Bastian Braun

2008-05-01T23:59:59.000Z

118

Explanation of the high temperature obtained in the Intermediate Power Test  

SciTech Connect

It is now generally known by those working on Tory II-A that the average maximum fuel element wall temperature obtained during the Intermediate Power Test was somewhat higher than the 2250 degrees F design value. The purpose of this report is to explain how this occurred.

Barnett, C.

1961-06-16T23:59:59.000Z

119

Elevated-temperature fracture toughness and fatigue testing of steels for geothermal applications. Annual progress report  

DOE Green Energy (OSTI)

Conventional drill bit steels exhibit increased wear and decreased toughness when run at elevated temperatures in geothermal wells. Bits are therefore run at lower speeds and lighter loads, resulting in lower penetration rates for geothermal wells than for conventional rock drilling. Carpenter EX-00053, Timken CBS 600, Timken CBS 1000M and Vasco X-2M, steels with improved hot hardness (improved wear resistance), were tested in conjunction with the steels used for cones (AISI 4820 and 9315) and lugs (AISI 8620 and 9315) in conventional roller cone rock bits. Shortrod fracture toughness measurements were made on each of these steels between room temperature and 400/sup 0/C. Fatigue crack resistance was determined at 300/sup 0/C for high-temperature steels and at room temperature for conventional steels. Scanning electron microscopy analyses of the fractured short-rod specimens were correlated with observed crack behavior from the test records. Test results are discussed, recommendations made for further testing and preliminary steel selections made for improved geothermal bits.

Cutler, R.A.; Goodman, E.C.; Guest, R.V.; Hendrickson, R.R.; Leslie, W.C.

1980-11-01T23:59:59.000Z

120

Test Plan for Long-Term Operation of a Ten-Cell High Temperature Electrolysis Stack  

DOE Green Energy (OSTI)

This document defines a test plan for a long-term (2500 Hour) test of a ten-cell high-temperature electrolysis stack to be performed at INL during FY09 under the Nuclear Hydrogen Initiative. This test was originally planned for FY08, but was removed from our work scope as a result of the severe budget cuts in the FY08 NHI Program. The purpose of this test is to evaluate stack performance degradation over a relatively long time period and to attempt to identify some of the degradation mechanisms via post-test examination. This test will be performed using a planar ten-cell Ceramatec stack, with each cell having dimensions of 10 cm 10 cm. The specific makeup of the stack will be based on the results of a series of shorter duration ten-cell stack tests being performed during FY08, funded by NGNP. This series of tests was aimed at evaluating stack performance with different interconnect materials and coatings and with or without brazed edge rails. The best performing stack from the FY08 series, in which five different interconnect/coating/edge rail combinations were tested, will be selected for the FY09 long-term test described herein.

James E. O'Brien; Carl M. Stoots; J. Stephen Herring

2008-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "test static temperature" 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

Standard Test Methods for Photovoltaic Modules in Cyclic Temperature and Humidity Environments  

E-Print Network (OSTI)

1.1 These test methods provide procedures for stressing photovoltaic modules in simulated temperature and humidity environments. Environmental testing is used to simulate aging of module materials on an accelerated basis. 1.2 Three individual environmental test procedures are defined by these test methods: a thermal cycling procedure, a humidity-freeze cycling procedure, and an extended duration damp heat procedure. Electrical biasing is utilized during the thermal cycling procedure to simulate stresses that are known to occur in field-deployed modules. 1.3 These test methods define mounting methods for modules undergoing environmental testing, and specify parameters that must be recorded and reported. 1.4 These test methods do not establish pass or fail levels. The determination of acceptable or unacceptable results is beyond the scope of these test methods. 1.5 Any of the individual environmental tests may be performed singly, or may be combined into a test sequence with other environmental or non-envir...

American Society for Testing and Materials. Philadelphia

2009-01-01T23:59:59.000Z

122

Design of an Integrated Laboratory Scale Test for Hydrogen Production via High Temperature Electrolysis  

DOE Green Energy (OSTI)

The Idaho National Laboratory (INL) is researching the feasibility of high-temperature steam electrolysis for high-efficiency carbon-free hydrogen production using nuclear energy. Typical temperatures for high-temperature electrolysis (HTE) are between 800-900C, consistent with anticipated coolant outlet temperatures of advanced high-temperature nuclear reactors. An Integrated Laboratory Scale (ILS) test is underway to study issues such as thermal management, multiple-stack electrical configuration, pre-heating of process gases, and heat recuperation that will be crucial in any large-scale implementation of HTE. The current ILS design includes three electrolysis modules in a single hot zone. Of special design significance is preheating of the inlet streams by superheaters to 830C before entering the hot zone. The ILS system is assembled on a 10 x 16 skid that includes electronics, power supplies, air compressor, pumps, superheaters, , hot zone, condensers, and dew-point sensor vessels. The ILS support system consists of three independent, parallel supplies of electrical power, sweep gas streams, and feedstock gas mixtures of hydrogen and steam to the electrolysis modules. Each electrolysis module has its own support and instrumentation system, allowing for independent testing under different operating conditions. The hot zone is an insulated enclosure utilizing electrical heating panels to maintain operating conditions. The target hydrogen production rate for the ILS is 5000 Nl/hr.

G.K. Housley; K.G. Condie; J.E. O'Brien; C. M. Stoots

2007-06-01T23:59:59.000Z

123

RECENT ADVANCES IN HIGH TEMPERATURE ELECTROLYSIS AT IDAHO NATIONAL LABORATORY: STACK TESTS  

DOE Green Energy (OSTI)

High temperature steam electrolysis is a promising technology for efficient sustainable large-scale hydrogen production. Solid oxide electrolysis cells (SOECs) are able to utilize high temperature heat and electric power from advanced high-temperature nuclear reactors or renewable sources to generate carbon-free hydrogen at large scale. However, long term durability of SOECs needs to be improved significantly before commercialization of this technology. A degradation rate of 1%/khr or lower is proposed as a threshold value for commercialization of this technology. Solid oxide electrolysis stack tests have been conducted at Idaho National Laboratory to demonstrate recent improvements in long-term durability of SOECs. Electrolytesupported and electrode-supported SOEC stacks were provided by Ceramatec Inc., Materials and Systems Research Inc. (MSRI), and Saint Gobain Advanced Materials (St. Gobain), respectively for these tests. Long-term durability tests were generally operated for a duration of 1000 hours or more. Stack tests based on technology developed at Ceramatec and MSRI have shown significant improvement in durability in the electrolysis mode. Long-term degradation rates of 3.2%/khr and 4.6%/khr were observed for MSRI and Ceramatec stacks, respectively. One recent Ceramatec stack even showed negative degradation (performance improvement) over 1900 hours of operation. A three-cell short stack provided by St. Gobain, however, showed rapid degradation in the electrolysis mode. Improvements on electrode materials, interconnect coatings, and electrolyteelectrode interface microstructures contribute to better durability of SOEC stacks.

X, Zhang; J. E. O'Brien; R. C. O'Brien; J. J. Hartvigsen; G. Tao; N. Petigny

2012-07-01T23:59:59.000Z

124

The Fuel Accident Condition Simulator (FACS) furnace system for high temperature performance testing of VHTR fuel  

SciTech Connect

The AGR-1 irradiation of TRISO-coated particle fuel specimens was recently completed and represents the most successful such irradiation in US history, reaching peak burnups of greater than 19% FIMA with zero failures out of 300,000 particles. An extensive post-irradiation examination (PIE) campaign will be conducted on the AGR-1 fuel in order to characterize the irradiated fuel properties, assess the in-pile fuel performance in terms of coating integrity and fission metals release, and determine the fission product retention behavior during high temperature safety testing. A new furnace system has been designed, built, and tested to perform high temperature accident tests. The Fuel Accident Condition Simulator furnace system is designed to heat fuel specimens at temperatures up to 2000 degrees C in helium while monitoring the release of volatile fission metals (e.g. Cs, Ag, Sr, and Eu), iodine, and fission gases (Kr, Xe). Fission gases released from the fuel to the sweep gas are monitored in real time using dual cryogenic traps fitted with high purity germanium detectors. Condensable fission products are collected on a plate attached to a water-cooled cold finger that can be exchanged periodically without interrupting the test. Analysis of fission products on the condensation plates involves dry gamma counting followed by chemical analysis of selected isotopes. This paper will describe design and operational details of the Fuel Accident Condition Simulator furnace system and the associated fission gas monitoring system, as well as preliminary system calibration results.

Paul A. Demkowicz; David V. Laug; Dawn M. Scates; Edward L. Reber; Lyle G. Roybal; John B. Walter; Jason M. Harp; Robert N. Morris

2012-10-01T23:59:59.000Z

125

An optimized model and test of the China's first high temperature parabolic trough solar receiver  

SciTech Connect

The vacuum solar receiver is the key component of a parabolic trough solar plant, which plays a prominent role in the gross system efficiency. Recently, China's first high temperature vacuum receiver, Sanle-3 HCE, has been developed and produced by Southeast University and Sanle Electronic Group. Before being utilized in China's first parabolic trough solar plant, accurately estimating the thermal properties of this new receiver is important. This paper first establishes and optimizes a 1-D theoretical model at Matlab program to compute the receiver's major heat loss through glass envelope, and then systematically analyzes the major influence factors of heat loss. With the laboratorial steady state test stand, the heat losses of both good vacuum and non-vacuum Sanle-3 receivers were surveyed. Comparison shows the original 1-D model agrees with the ends covered test while remarkably deviating from end exposed test. For the purpose of identifying the influence of receiver's end to total heat loss, an additional 3-D model is built by CFD software to further investigate the different heat transfer processes of receiver's end components. The 3-D end model is verified by heating power and IR temperature distribution images in the test. Combining the optimized 1-D model with the new 3-D end model, the comparison with test data shows a good accordance. At the same time the heat loss curve and emittance curve of this new receiver are given and compared with those of several other existing receivers as references. (author)

Gong, Guangjie; Huang, Xinyan; Wang, Jun; Hao, Menglong [Southeast University, Nanjing (China)

2010-12-15T23:59:59.000Z

126

Impact Testing of Stainless Steel Material at Room and Elevated Temperatures  

SciTech Connect

Stainless steels are used for the construction of numerous spent nuclear fuel or radioactive material containers that may be subjected to high strains and moderate strain rates during accidental drop events. Mechanical characteristics of these base materials and their welds under dynamic loads in the strain rate range of concern are not well documented. However, three previous papers [1, 2, 3] reported on impact testing and analysis results performed at the Idaho National Laboratory using 304/304L and 316/316L stainless steel base material specimens that began the investigation of these characteristics. The goal of the work presented herein is to add the results of additional tensile impact testing for 304/304L and 316/316L stainless steel material specimens. Utilizing a drop-weight impact test machine and 1/4-inch to 1/2-inch thick dog-bone shaped test specimens, additional tests achieved target strain rates of 5, 10, and 22 per second at room temperature, 300, and 600 degrees Fahrenheit. Elevated true stress-strain curves for these materials at each designated strain rate and temperature are presented herein.

Dana K. Morton; Spencer D. Snow; Tom E. Rahl; Robert K. Blandford

2007-07-01T23:59:59.000Z

127

High Temperature Solid-Oxide Electrolyzer 2500 Hour Test Results At The Idaho National Laboratory  

DOE Green Energy (OSTI)

The Idaho National Laboratory (INL) has been developing the concept of using solid oxide fuel cells as electrolyzers for large-scale, high-temperature (efficient), hydrogen production. This program is sponsored by the U.S. Department of Energy under the Nuclear Hydrogen Initiative. Utilizing a fuel cell as an electrolyzer introduces some inherent differences in cell operating conditions. In particular, the performance of fuel cells operated as electrolyzers degrades with time faster. This issue of electrolyzer cell and stack performance degradation over time has been identified as a major barrier to technology development. Consequently, the INL has been working together with Ceramatec, Inc. (Salt Lake City, Utah) to improve the long-term performance of high temperature electrolyzers. As part of this research partnership, the INL conducted a 2500 hour test of a Ceramatec designed and produced stack operated in the electrolysis mode. This paper will provide a summary of experimental results to date for this ongoing test.

Carl Stoots; James O'Brien; Stephen Herring; Keith Condie; Lisa Moore-McAteer; Joseph J. Hartvigsen; Dennis Larsen

2009-11-01T23:59:59.000Z

128

2500-Hour High Temperature Solid-Oxide Electrolyzer Long Duration Test  

DOE Green Energy (OSTI)

The Idaho National Laboratory (INL) has been developing the concept of using solid oxide fuel cells as electrolyzers for large-scale, high-temperature (efficient), hydrogen production. This program is sponsored by the U.S. Department of Energy under the Nuclear Hydrogen Initiative. Utilizing a fuel cell as an electrolyzer introduces some inherent differences in cell operating conditions. In particular, the performance of fuel cells operated as electrolyzers degrades with time faster. This issue of electrolyzer cell and stack performance degradation over time has been identified as a major barrier to technology development. Consequently, the INL has been working together with Ceramatec, Inc. (Salt Lake City, Utah) to improve the long-term performance of high temperature electrolyzers. As part of this research partnership, the INL conducted a 2500 hour test of a Ceramatec designed and produced stack operated in the electrolysis mode. This report will provide a summary of experimental results for this long duration test.

C. M. Stoots; J. E. O'Brien; K. G. Condie; L. Moore-McAteer; J. J. Hartvigsen; D. Larsen

2009-11-01T23:59:59.000Z

129

Development and field testing of the high-temperature borehole televiewer  

DOE Green Energy (OSTI)

The High-Temperature Borehole Televiewer is a downhole instrument which provides acoustic pictures of the borehole walls that are suitable for casing inspection and fracture detection in geothermal wells. The Geothermal Drilling Organization has funded the development of a commercial tool survivable to temperatures up to 275{degree}C and pressures of 5000 psi. A real-time display on an IBM-compatible PC was included as part of the developmental effort. This paper describes the three principal components are: the mechanical section, the electronics, and the computer software and hardware. Each of these three components are described with special attention to important design changes most pertinent to a high temperature environment. The results of two field tests of the televiewer system are also described. 7 refs., 4 figs.

Duda, L.E.; Uhl, J.E.; Wemple, R.P.

1990-01-01T23:59:59.000Z

130

Performance testing of hydrogen transport membranes at elevated temperatures and pressures.  

DOE Green Energy (OSTI)

The development of hydrogen transport ceramic membranes offers increased opportunities for hydrogen gas separation and utilization. Commercial application of such membranes will most likely take place under conditions of elevated temperature and pressure, where industrial processes producing and or utilizing hydrogen occur, and where such membranes are theoretically expected to have the greatest permeability. Hydrogen separation membrane performance data at elevated temperature is quite limited, and data at elevated pressures is conspicuously lacking. This paper will describe the design, construction, and recent experimental results obtained from a membrane testing unit located at the U.S. Department of Energy's Federal Energy Technology Center (FETC). The membrane testing unit is capable of operating at temperatures up to 900 C and pressures up to 500 psi. Mixed-oxide ceramic ion-transport membranes, fabricated at Argonne National Laboratory (ANL), were evaluated for hydrogen permeability and characterized for surface changes and structural integrity using scanning electron microscopy/X-ray microanalysis (SEM/EDS), X-ray photoelectron spectroscopy (XPS) and atomic force microscopy (AFM), as a function of temperature, pressure, and hydrogen exposure.

Balachandran, U.; Cugini, A. V.; Dorris, S. E.; Fisher, E. P.; Graham, W. J.; Martello, D. V.; Poston, J. A.; Rothenberger, K. S.; Siriwardane, R. W.

1999-06-16T23:59:59.000Z

131

Tritium production analysis and management strategies for a Fluoride-salt-cooled high-temperature test reactor (FHTR)  

E-Print Network (OSTI)

The Fluoride-salt-cooled High-temperature Test Reactor (FHTR) is a test reactor concept that aims to demonstrate the neutronics, thermal-hydraulics, materials, tritium management, and to address other reactor operational ...

Rodriguez, Judy N

2013-01-01T23:59:59.000Z

132

Ash Static Liquefaction  

Science Conference Proceedings (OSTI)

This laboratory study was focused on assessing fundamental geotechnical engineering properties of fly ash. It involved the testing of fly ash recovered from the existing ash ponds and from dry fly ash silos operated by 5 participating utilities. Materials from 22 different sites were involved in the testing program. To provide comprehensive fundamental understanding of the similarities and differences between the samples, a series of basic geotechnical engineering characterization ...

2012-12-28T23:59:59.000Z

133

An Analysis of Testing Requirements for Fluoride Salt Cooled High Temperature Reactor Components  

SciTech Connect

This report provides guidance on the component testing necessary during the next phase of fluoride salt-cooled high temperature reactor (FHR) development. In particular, the report identifies and describes the reactor component performance and reliability requirements, provides an overview of what information is necessary to provide assurance that components will adequately achieve the requirements, and then provides guidance on how the required performance information can efficiently be obtained. The report includes a system description of a representative test scale FHR reactor. The reactor parameters presented in this report should only be considered as placeholder values until an FHR test scale reactor design is completed. The report focus is bounded at the interface between and the reactor primary coolant salt and the fuel and the gas supply and return to the Brayton cycle power conversion system. The analysis is limited to component level testing and does not address system level testing issues. Further, the report is oriented as a bottom-up testing requirements analysis as opposed to a having a top-down facility description focus.

Holcomb, David Eugene [ORNL; Cetiner, Mustafa Sacit [ORNL; Flanagan, George F [ORNL; Peretz, Fred J [ORNL; Yoder Jr, Graydon L [ORNL

2009-11-01T23:59:59.000Z

134

Standard Test Method for Normal Spectral Emittance at Elevated Temperatures of Nonconducting Specimens  

E-Print Network (OSTI)

1.1 This test method describes an accurate technique for measuring the normal spectral emittance of electrically nonconducting materials in the temperature range from 1000 to 1800 K, and at wavelengths from 1 to 35 ?m. It is particularly suitable for measuring the normal spectral emittance of materials such as ceramic oxides, which have relatively low thermal conductivity and are translucent to appreciable depths (several millimetres) below the surface, but which become essentially opaque at thicknesses of 10 mm or less. 1.2 This test method requires expensive equipment and rather elaborate precautions, but produces data that are accurate to within a few percent. It is particularly suitable for research laboratories, where the highest precision and accuracy are desired, and is not recommended for routine production or acceptance testing. Because of its high accuracy, this test method may be used as a reference method to be applied to production and acceptance testing in case of dispute. 1.3 This test metho...

American Society for Testing and Materials. Philadelphia

1971-01-01T23:59:59.000Z

135

Static identification of delinquent loads  

E-Print Network (OSTI)

The effective use of processor caches is crucial to the performance of applications. It has been shown that cache misses are not evenly distributed throughout a program. In applications running on RISC-style processors, a small number of delinquent load instructions are responsible for most of the cache misses. Identification of delinquent loads is the key to the success of many cache optimization and prefetching techniques. In this paper, we propose a method for identifying delinquent loads that can be implemented at compile time. Our experiments over eighteen benchmarks from the SPEC suite shows that our proposed scheme is stable across benchmarks, inputs, and cache structures, identifying an average of 10 % of the total number of loads in the benchmarks we tested that account for over 90 % of all data cache misses. As far as we know, this is the first time a technique for static delinquent load identification with such a level of precision and coverage has been reported. While comparable techniques can also identify load instructions that cover 90 % of all data cache misses, they do so by selecting over 50 % of all load instructions in the code, resulting in a high number of false positives. If basic block profiling is used in conjunction with our heuristic, then our results show that it is possible to pin down just 1.3 % of the load instructions that account for 82 % of all data cache misses. 1.

Vlad-mihai Panait; Amit Sasturkar

2004-01-01T23:59:59.000Z

136

Preliminary Benchmark Evaluation of Japans High Temperature Engineering Test Reactor  

SciTech Connect

A benchmark model of the initial fully-loaded start-up core critical of Japans High Temperature Engineering Test Reactor (HTTR) was developed to provide data in support of ongoing validation efforts of the Very High Temperature Reactor Program using publicly available resources. The HTTR is a 30 MWt test reactor utilizing graphite moderation, helium coolant, and prismatic TRISO fuel. The benchmark was modeled using MCNP5 with various neutron cross-section libraries. An uncertainty evaluation was performed by perturbing the benchmark model and comparing the resultant eigenvalues. The calculated eigenvalues are approximately 2-3% greater than expected with an uncertainty of 0.70%. The primary sources of uncertainty are the impurities in the core and reflector graphite. The release of additional HTTR data could effectively reduce the benchmark model uncertainties and bias. Sensitivity of the results to the graphite impurity content might imply that further evaluation of the graphite content could significantly improve calculated results. Proper characterization of graphite for future Next Generation Nuclear Power reactor designs will improve computational modeling capabilities. Current benchmarking activities include evaluation of the annular HTTR cores and assessment of the remaining start-up core physics experiments, including reactivity effects, reactivity coefficient, and reaction-rate distribution measurements. Long term benchmarking goals might include analyses of the hot zero-power critical, rise-to-power tests, and other irradiation, safety, and technical evaluations performed with the HTTR.

John Darrell Bess

2009-05-01T23:59:59.000Z

137

Static StabilityAn Update  

Science Conference Proceedings (OSTI)

Static stability should not be evaluated from the local lapse rate. There is a growing body of observations, such as within portions of mixed layers and forest canopies, showing that the whole sounding should be considered to evaluate stability. ...

Roland B. Stull

1991-10-01T23:59:59.000Z

138

Use and Storage of Test and Operations Data from the High Temperature Test Reactor Acquired by the US Government from the Japan Atomic Energy Agency  

SciTech Connect

This document describes the use and storage of data from the High Temperature Test Reactor (HTTR) acquired from the Japan Atomic Energy Agency (JAEA) by the U.S. Government for high temperature reactor research under the Next Generation Nuclear Plant (NGNP) Project.

Hans Gougar

2010-02-01T23:59:59.000Z

139

High Temperature Steam Electrolysis Materials Degradation: Preliminary Results of Corrosion Tests on Ceramatec Electrolysis Cell Components  

DOE Green Energy (OSTI)

Corrosion tests were performed on stainless steel and nickel alloy coupons in H2O/H2 mixtures and dry air to simulate conditions experienced in high temperature steam electrolysis systems. The stainless steel coupons were tested bare and with one of three different proprietary coatings applied. Specimens were corroded at 850C for 500 h with weight gain data recorded at periodic intervals. Post-test characterization of the samples included surface and cross-section scanning electron microscopy, grazing incidence x-ray diffraction, and area-specific resistance measurements. The uncoated nickel alloy outperformed the ferritic stainless steel under all test conditions based on weight gain data. Parabolic rate constants for corrosion of these two uncoated alloys were consistent with values presented in the literature under similar conditions. The steel coatings reduced corrosion rates in H2O/H2 mixtures by as much as 50% compared to the untreated steel, but in most cases showed negligible corrosion improvement in air. The use of a rare-earth-based coating on stainless steel did not result in a significantly different area specific resistance values after corrosion compared to the untreated alloy. Characterization of the samples is still in progress and the findings will be revised when the complete data set is available.

Paul Demkowicz; Prateek Sachdev; Kevin DeWall; Pavel Medvedev

2007-06-01T23:59:59.000Z

140

RECENT ADVANCES IN HIGH TEMPERATURE ELECTROLYSIS AT IDAHO NATIONAL LABORATORY: SINGLE CELL TESTS  

DOE Green Energy (OSTI)

An experimental investigation on the performance and durability of single solid oxide electrolysis cells (SOECs) is under way at the Idaho National Laboratory. In order to understand and mitigate the degradation issues in high temperature electrolysis, single SOECs with different configurations from several manufacturers have been evaluated for initial performance and long-term durability. A new test apparatus has been developed for single cell and small stack tests from different vendors. Single cells from Ceramatec Inc. show improved durability compared to our previous stack tests. Single cells from Materials and Systems Research Inc. (MSRI) demonstrate low degradation both in fuel cell and electrolysis modes. Single cells from Saint Gobain Advanced Materials (St. Gobain) show stable performance in fuel cell mode, but rapid degradation in the electrolysis mode. Electrolyte-electrode delamination is found to have significant impact on degradation in some cases. Enhanced bonding between electrolyte and electrode and modification of the microstructure help to mitigate degradation. Polarization scans and AC impedance measurements are performed during the tests to characterize the cell performance and degradation.

X. Zhang; J. E. O'Brien; R. C. O'Brien

2012-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "test static temperature" 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.
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141

Vortex Diode Analysis and Testing for Fluoride Salt-Cooled High-Temperature Reactors  

SciTech Connect

Fluidic diodes are presently being considered for use in several fluoride salt-cooled high-temperature reactor designs. A fluidic diode is a passive device that acts as a leaky check valve. These devices are installed in emergency heat removal systems that are designed to passively remove reactor decay heat using natural circulation. The direct reactor auxiliary cooling system (DRACS) uses DRACS salt-to-salt heat exchangers (DHXs) that operate in a path parallel to the core flow. Because of this geometry, under normal operating conditions some flow bypasses the core and flows through the DHX. A flow diode, operating in reverse direction, is-used to minimize this flow when the primary coolant pumps are in operation, while allowing forward flow through the DHX under natural circulation conditions. The DRACSs reject the core decay heat to the environment under loss-of-flow accident conditions and as such are a reactor safety feature. Fluidic diodes have not previously been used in an operating reactor system, and therefore their characteristics must be quantified to ensure successful operation. This report parametrically examines multiple design parameters of a vortex-type fluidic diode to determine the size of diode needed to reject a particular amount of decay heat. Additional calculations were performed to size a scaled diode that could be tested in the Oak Ridge National Laboratory Liquid Salt Flow Loop. These parametric studies have shown that a 152.4 mm diode could be used as a test article in that facility. A design for this diode is developed, and changes to the loop that will be necessary to test the diode are discussed. Initial testing of a scaled flow diode has been carried out in a water loop. The 150 mm diode design discussed above was modified to improve performance, and the final design tested was a 171.45 mm diameter vortex diode. The results of this testing indicate that diodicities of about 20 can be obtained for diodes of this size. Experimental results show similar trends as the computational fluid dynamics (CFD) results presented in this report; however, some differences exist that will need to be assessed in future studies. The results of this testing will be used to improve the diode design to be tested in the liquid salt loop system.

Yoder Jr, Graydon L [ORNL; Elkassabgi, Yousri M. [Texas A& M University, Kingsville; De Leon, Gerardo I. [Texas A& M University, Kingsville; Fetterly, Caitlin N. [Texas A& M University, Kingsville; Ramos, Jorge A. [Texas A& M University, Kingsville; Cunningham, Richard Burns [University of Tennessee, Knoxville (UTK)

2012-02-01T23:59:59.000Z

142

Frostbite Theater - Static Electricity Experiments - How Does...  

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

Static Electricity and Bubbles Previous Video (Static Electricity and Bubbles) Frostbite Theater Main Index Next Video (How to Make Your Own Electroscope) How to Make Your Own...

143

Long-Term Degradation Testing of High-Temperature Electrolytic Cells  

SciTech Connect

The Idaho National Laboratory (INL) has been researching the application of solid-oxide electrolysis cell for large-scale hydrogen production from steam over a temperature range of 800 to 900C. The INL has been testing various solid oxide cell designs to characterize their electrolytic performance operating in the electrolysis mode for hydrogen production. Some results presented in this report were obtained from cells, with an active area of 16 cm2 per cell. The electrolysis cells are electrode-supported, with ~10 m thick yttria-stabilized zirconia (YSZ) electrolytes, ~1400 m thick nickel-YSZ steam-hydrogen electrodes, and manganite (LSM) air-oxygen electrodes. The experiments were performed over a range of steam inlet mole fractions (0.1 to 0.6), gas flow rates, and current densities (0 to 0.6 A/cm2). Steam consumption rates associated with electrolysis were measured directly using inlet and outlet dewpoint instrumentation. On a molar basis, the steam consumption rate is equal to the hydrogen production rate. Cell performance was evaluated by performing DC potential sweeps at 800, 850, and 900C. The voltage-current characteristics are presented, along with values of area-specific resistance as a function of current density. Long-term cell performance is also assessed to evaluate cell degradation. Details of the custom single-cell test apparatus developed for these experiments are also presented. NASA, in conjunction with the University of Toledo, has developed a new cell concept with the goals of reduced weight and high power density. This report presents results of the INL's testing of this new solid oxide cell design as an electrolyzer. Gas composition, operating voltage, and other parameters were varied during testing. Results to date show the NASA cell to be a promising design for both high power-to-weight fuel cell and electrolyzer applications.

C.M. Stoots; J.E. O' Brien; J.S. Herring; G.K. Housley; D.G. Milobar; M.S. Sohal

2009-08-01T23:59:59.000Z

144

Preliminary operational results of the low-temperature solar industrial process heat field tests  

DOE Green Energy (OSTI)

Six solar industrial process heat field tests have been in operation for a year or more - three are hot water systems and three are hot air systems. All are low-temperature projects (process heat at temperatures below 212/sup 0/F). Performance results gathered by each contractor's data acquisition system are presented and project costs and problems encountered are summarized. Flat-plate, evacuated-tube, and line-focus collectors are all represented in the program, with collector array areas ranging from 2500 to 21,000 ft/sup 2/. Collector array efficiencies ranged from 12% to 36% with net system efficiencies from 8% to 33%. Low efficiencies are attributable in some cases to high thermal losses and, for the two projects using air collectors, are due in part to high parasitic power consumption. Problems have included industrial effluents on collectors, glazing and absorber surface failures, excessive thermal losses, freezing and overheating, control problems, and data acquisition system failure. With design and data acquisition costs excluded costs of the projects ranged from $25/ft/sup 2/ to $87/ft/sup 2/ and $499/(MBtu/yr) to $1537/(MBtu/yr).

Kutscher, C.F.; Davenport, R.L.

1980-06-01T23:59:59.000Z

145

An Experimental Evaluation of HVAC-Grade Carbon-Dioxide Sensors: Part 3, Humidity, Temperature, and Pressure Sensitivity Test Results  

Science Conference Proceedings (OSTI)

This is the third paper in a four-part series reporting on the test and evaluation of typical carbon-dioxide sensors used in building HVAC applications. Fifteen models of NDIR HVAC-grade CO2 sensors were tested and evaluated to determine the humidity, temperature, and pressure sensitivity of the sensors. This paper reports the performance of the sensors at various relative humidity, temperature, and pressure levels common to building HVAC applications and provides a comparison with manufacturer specifications. Among the 15 models tested, eight models have a single-lamp, single-wavelength configuration, four models have a dual-lamp, single-wavelength configuration, and three models have a single-lamp, dual-wavelength configuration. The sensors were tested in a chamber specifically fabricated for this research. A description of the apparatus and the method of test are described in Part 1 (Shrestha and Maxwell 2009). The test result showed a wide variation in humidity, temperature, and pressure sensitivity of CO2 sensors among manufacturers. In some cases, significant variations in sensor performance exist between sensors of the same model. Even the natural variation in relative humidity could significantly vary readings of some CO2 sensor readings. The effects of temperature and pressure variation on NDIR CO2 sensors are unavoidable without an algorithm to compensate for the changes. For the range of temperature and pressure variation in an air-conditioned space, the effect of pressure variation is more significant compared to the effect of temperature variation.

Shrestha, Som S [ORNL; Maxwell, Dr. Gregory [Iowa State University

2010-01-01T23:59:59.000Z

146

THE COMPONENT TEST FACILITY A NATIONAL USER FACILITY FOR TESTING OF HIGH TEMPERATURE GAS-COOLED REACTOR (HTGR) COMPONENTS AND SYSTEMS  

DOE Green Energy (OSTI)

The Next Generation Nuclear Plant (NGNP) and other High-Temperature Gas-cooled Reactor (HTGR) Projects require research, development, design, construction, and operation of a nuclear plant intended for both high-efficiency electricity production and high-temperature industrial applications, including hydrogen production. During the life cycle stages of an HTGR, plant systems, structures and components (SSCs) will be developed to support this reactor technology. To mitigate technical, schedule, and project risk associated with development of these SSCs, a large-scale test facility is required to support design verification and qualification prior to operational implementation. As a full-scale helium test facility, the Component Test facility (CTF) will provide prototype testing and qualification of heat transfer system components (e.g., Intermediate Heat Exchanger, valves, hot gas ducts), reactor internals, and hydrogen generation processing. It will perform confirmation tests for large-scale effects, validate component performance requirements, perform transient effects tests, and provide production demonstration of hydrogen and other high-temperature applications. Sponsored wholly or in part by the U.S. Department of Energy, the CTF will support NGNP and will also act as a National User Facility to support worldwide development of High-Temperature Gas-cooled Reactor technologies.

David S. Duncan; Vondell J. Balls; Stephanie L. Austad

2008-09-01T23:59:59.000Z

147

static  

Science Conference Proceedings (OSTI)

... domain does not change. See also dynamic, dynamization transformation. Note: From Algorithms and Theory of Computation Handbook, page 20 ...

2013-08-23T23:59:59.000Z

148

A Global Survey of Static Stability in the Stratosphere and Upper Troposphere  

Science Conference Proceedings (OSTI)

Static stability is a fundamental dynamical quantity that measures the vertical temperature stratification of the atmosphere. However, the magnitude and structure of finescale features in this field are difficult to discern in temperature data ...

Kevin M. Grise; David W. J. Thompson; Thomas Birner

2010-05-01T23:59:59.000Z

149

Frostbite Theater - Static Electricity Experiments - Static Electricity and  

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

Polar Molecules Polar Molecules Previous Video (Polar Molecules) Frostbite Theater Main Index Next Video (How Does a Van de Graaff Generator Work?) How Does a Van de Graaff Generator Work? Static Electricity and Bubbles! What happens when soap bubbles are blown into the air near a working Van de Graaff generator? [ Show Transcript ] Announcer: Frostbite Theater presents... Cold Cuts! No baloney! Joanna and Steve: Just science! Joanna: Hi! I'm Joanna! Steve: And I'm Steve! Joanna: And this is a Van de Graaff generator! Steve: And these... are bubbles! Joanna: Have you ever noticed that you tend to get shocked less in the summer by static electricity than you do in the winter? That's because usually there's more moisture in the air in the summer than in the winter. Since water molecules are polar, they are attracted to, and carry charge

150

Metallographic examinations of Type 304 stainless steel (heat 9T2796) tested in high-temperature uniaxial and multiaxial experiments  

SciTech Connect

The results obtained from a number of metallographic examinations of Type 304 stainless steel specimens were compiled. Samples were obtained from uniaxial and multiaxial tests covering a very broad span of temperatures and times. Special emphasis was on the identification of failure modes, cracking patterns, grain distortion, and grain-boundary microstructures. Uniaxial specimens exhibited the following sequence of failure modes with increasing temperature and time: ductile plastic tearing, ductile plastic shear, wedge cracking, and microvoid cracking. Over most of the temperature range examined (482 to 871/sup 0/C), M/sub 23/C/sub 6/ precipitated on grain boundaries at long times. Sigma phase and possibly ferrite were often present in the stressed areas at temperatures as low as 482/sup 0/C (900/sup 0/F). These metallurgical features promoted a severe loss in creep ductility at long times and low temperatures. Most multiaxial tests were performed under conditions that promoted wedge cracking. Stress gradients also favored surface crack initiation rather than bulk damage. Testing times for multiaxial tests were less than 10,000 h; hence, there was insufficient time for the development of embrittling features such as microvoids, sigma, and ferrite. Long-time multiaxial tests to failure are recommended.

Swindeman, R.W.; Houck, C.W.

1984-03-01T23:59:59.000Z

151

Bench-scale reactor tests of low-temperature, catalytic gasification of wet, industrial wastes  

DOE Green Energy (OSTI)

Bench-scale reactor tests are under way at Pacific Northwest Laboratory to develop a low-temperature, catalytic gasification system. The system, licensed under the trade name Thermochemical Environmental Energy System (TEES{reg sign}), is designed for to a wide variety of feedstocks ranging from dilute organics in water to waste sludges from food processing. The current research program is focused on the use of a continuous-feed, tubular reactor. The catalyst is nickel metal on an inert support. Typical results show that feedstocks such as solutions of 2% para-cresol or 5% and 10% lactose in water or cheese whey can be processed to >99% reduction of chemical oxygen demand (COD) at a rate of up to 2 L/hr. The estimated residence time is less than 5 min at 360{degree}C and 3000 psig, not including 1 to 2 min required in the preheating zone of the reactor. The liquid hourly space velocity has been varied from 1.8 to 2.9 L feedstock/L catalyst/hr depending on the feedstock. The product fuel gas contains 40% to 55% methane, 35% to 50% carbon dioxide, and 5% to 10% hydrogen with as much as 2% ethane, but less than 0.1% ethylene or carbon monoxide, and small amounts of higher hydrocarbons. The byproduct water stream carries residual organics amounting to less than 500 mg/L COD. 9 refs., 1 fig., 4 tabs.

Elliott, D.C.; Neuenschwander, G.G.; Baker, E.G.; Butner, R.S.; Sealock, L.J.

1990-04-01T23:59:59.000Z

152

A humidity temperature test on the HLNC (high-level neutron coincidence counter) instrument  

SciTech Connect

This paper presents the findings of a laboratory study made to determine the effects of unusual climatic conditions on high-level neutron coincidence counters (HLNCs). The capability of the instrument, when undesirable temperatures and/or humidities are present, the change in count rate as temperature and humidity increase, and the extent of humidity/temperature interaction are examined.

Goldman, A.; Augustson, R.; Karlin, E.W.

1987-07-01T23:59:59.000Z

153

Design, Test and Demonstration of Saturable Reactor High-Temperature Superconductor Fault Current Limiters  

Science Conference Proceedings (OSTI)

Zenergy Power has successfully designed, built, tested, and installed in the US electrical grid a saturable reactor Fault Current Limiter. Beginning in 2007, first as SC Power Systems and from 2008 as Zenergy Power, Inc., ZP used DOE matching grant and ARRA funds to help refine the design of the saturated reactor fault current limiter. ZP ultimately perfected the design of the saturated reactor FCL to the point that ZP could reliably design a suitable FCL for most utility applications. Beginning with a very basic FCL design using 1G HTS for a coil housed in a LN2 cryostat for the DC bias magnet, the technology progressed to a commercial system that was offered for sale internationally. Substantial progress was made in two areas. First, the cryogenics cooling system progressed from a sub-cooled liquid nitrogen container housing the HTS coils to cryostats utilizing dry conduction cooling and reaching temperatures down to less than 20 degrees K. Large, round cryostats with ??warm bore? diameters of 1.7 meters enabled the design of large tanks to hold the AC components. Second, the design of the AC part of the FCL was refined from a six legged ??spider? design to a more compact and lighter design with better fault current limiting capability. Further refinement of the flux path and core shape led to an efficient saturated reactor design requiring less Ampere-turns to saturate the core. In conclusion, the development of the saturable reactor FCL led to a more efficient design not requiring HTS magnets and their associated peripheral equipment, which yielded a more economical product in line with the electric utility industry expectations. The original goal for the DOE funding of the ZP project ??Design, Test and Demonstration of Saturable Reactor High-Temperature Superconductor Fault Current Limiters? was to stimulate the HTS wire industry with, first 1G, then 2G, HTS wire applications. Over the approximately 5 years of ZP??s product development program, the amount of HTS wire employed per FCL and its cost as a percentage of the total FCL product content had not dropped substantially from an unsustainable level of more than 50% of the total cost of the FCL, nor had the availability increased (today the availability of 2G wire for commercial applications outside of specific partnerships with the leading 2G wire manufacturers is extremely limited). ZP had projected a very significant commercial potential for FCLs with higher performance and lower costs compared to the initial models built with 1G wire, which would come about from the widespread availability of low-cost, high-performance 2G HTS wire. The potential for 2G wires at greatly reduced performance-based prices compared to 1G HTS conductor held out the potential for the commercial production of FCLs at price and performance levels attractive to the utility industry. However, the price of HTS wire did not drop as expected and today the available quantities of 2G wire are limited, and the price is higher than the currently available supplies of 1G wire. The commercial option for ZP to provide a reliable and reasonably priced FCL to the utility industry is to employ conventional resistive conductor DC electromagnets to bias the FCL. Since the premise of the original funding was to stimulate the HTS wire industry and ZP concluded that copper-based magnets were more economical for the foreseeable future, DOE and ZP decided to mutually terminate the project.

Frank Darmann; Robert Lombaerde; Franco Moriconi; Albert Nelson

2011-10-31T23:59:59.000Z

154

Observational evidence favors a static universe  

E-Print Network (OSTI)

The common attribute of all Big Bang cosmologies is that they are based on the assumption that the universe is expanding. However examination of the evidence for this expansion clearly favours a static universe. The major topics considered are: Tolman surface brightness, angular size, type 1a supernovae, gamma ray bursts, galaxy distributions, quasar distributions, X-ray background radiation, cosmic microwave background radiation, radio source counts, quasar variability and the Butcher--Oemler effect. An analysis of the best raw data for these topics shows that they are consistent with expansion only if there is evolution that cancels the effects of expansion. An alternate cosmology, curvature cosmology, is in full agreement with the raw data. This tired-light cosmology predicts a well defined static and stable universe and is fully described. It not only predicts accurate values for the Hubble constant and the temperature of cosmic microwave background radiation but shows excellent agreement with most of the topics considered. Curvature cosmology also predicts the deficiency in solar neutrino production rate and can explain the anomalous acceleration of {\\it Pioneer} 10.

David F. Crawford

2010-09-05T23:59:59.000Z

155

Singlet Free Energies of a Static Quark-Antiquark Pair  

E-Print Network (OSTI)

We study the singlet part of the free energy of a static quark anti-quark pair at finite temperature in three flavor QCD with degenerate quark masses using $N_{\\tau}=4$ and 6 lattices with Asqtad staggered fermion action. We look at thermodynamics of the system around phase transition and study its scaling with lattice spacing and quark masses.

Konstantin Petrov

2004-09-01T23:59:59.000Z

156

Generalized Static Energy and Its Conservation  

Science Conference Proceedings (OSTI)

The theoretical study presented here shows that it is possible to define an energetic parameter that generalizes the dry, saturated, and moist static energies. The properties of the generalized static energy (GSE) are similar to those of dry, ...

L. J. Rivas Soriano; E. L. Garca Dez; F. De Pablo Davila

1994-11-01T23:59:59.000Z

157

Testing the Fixed Anvil Temperature Hypothesis in a Cloud-Resolving Model  

Science Conference Proceedings (OSTI)

Using cloud-resolving simulations of tropical radiativeconvective equilibrium, it is shown that the anvil temperature changes by less than 0.5 K with a 2-K change in SST, lending support to the fixed anvil temperature (FAT) hypothesis. The ...

Zhiming Kuang; Dennis L. Hartmann

2007-05-01T23:59:59.000Z

158

System Engineering Program Applicability for the High Temperature Gas-Cooled Reactor (HTGR) Component Test Capability (CTC)  

SciTech Connect

This white paper identifies where the technical management and systems engineering processes and activities to be used in establishing the High Temperature Gas-cooled Reactor (HTGR) Component Test Capability (CTC) should be addressed and presents specific considerations for these activities under each CTC alternative

Jeffrey Bryan

2009-06-01T23:59:59.000Z

159

Summary Report on FY12 Small-Scale Test Activities High Temperature Electrolysis Program  

SciTech Connect

This report provides a description of the apparatus and the single cell testing results performed at Idaho National Laboratory during JanuaryAugust 2012. It is an addendum to the Small-Scale Test Report issued in January 2012. The primary program objectives during this time period were associated with design, assembly, and operation of two large experiments: a pressurized test, and a 4 kW test. Consequently, the activities described in this report represent a much smaller effort.

James O'Brien

2012-09-01T23:59:59.000Z

160

The Empirical Angular Function Approach: Testing Sea Surface Temperature Satellite Retrievals  

Science Conference Proceedings (OSTI)

Recently, a statistical procedure was proposed to analyze the angular effect in the NOAA Advanced Very High Resolution Radiometer (AVHRR) brightness temperatures. The estimated empirical angular functions (EAF) over the oceans allow one to check ...

Aleksandr M. Ignatov; G. Garik Gutman

1995-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "test static temperature" 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

Simulation Experiments for Testing the Assimilation of Geostationary Satellite Temperature Retrievals into a Numerical Prediction Model  

Science Conference Proceedings (OSTI)

Recent diagnostic studies using retrievals from the Visible Infrared Spin-Scan Radiometer (VISSR) Atmospheric Sounder (VAS) indicate that there are limitations of gestationary satellite sounding data (poor vertical resolution of temperature and ...

Tzvi Gal-Chen; Brian D. Schmidt; Louis W. Uccellini

1986-07-01T23:59:59.000Z

162

A Test for Inhomogeneous Variance in Time-averaged Temperature Data  

Science Conference Proceedings (OSTI)

Many climatic applications, including detection of climate change, require temperature time series that are free from discontinuities introduced by nonclimatic events such as relocation of weather stations. Although much attention has been ...

Mary W. Downton; Richard W. Katz

1993-12-01T23:59:59.000Z

163

FACET Tolerances for Static and Dynamic Misalignments  

Science Conference Proceedings (OSTI)

The Facility for AdvancedAccelerator and Experimental Tests (FACET) at the SLAC National Accelerator Laboratory is designed to deliver a beam with a transverse spot size on the order of 10 {micro}m x 10 {micro}m in a new beamline constructed at the two kilometer point of the SLAC linac. Commissioning the beamline requires mitigating alignment errors and their effects, which can be significant and result in spot sizes orders of magnitude larger. Sextupole and quadrupole alignment errors in particular can introduce errors in focusing, steering, and dispersion which can result in spot size growth, beta mismatch, and waist movement. Alignment errors due to static misalignments, mechanical jitter, energy jitter, and other physical processes can be analyzed to determine the level of accuracy and precision that the beamline requires. It is important to recognize these effects and their tolerances in order to deliver a beam as designed.

Federico, Joel

2012-07-13T23:59:59.000Z

164

Static slicing in the presence of goto statements  

Science Conference Proceedings (OSTI)

A static program slice is an extract of a program which can help our understanding of the behavior of the program; it has been proposed for use in debugging, optimization, parallelization, and integration of programs. This article considers two types ... Keywords: debugging, program analysis, slicing, testing

Jong-Deok Choi; Jeanne Ferrante

1994-07-01T23:59:59.000Z

165

Assessment of non-destructive testing of well casing,, cement and cement bond in high temperature wells  

DOE Green Energy (OSTI)

Because of the difficulty in bringing geothermal well blowouts under control, any indication of a casing/cement problem should be expeditiously evaluated and solved. There are currently no high temperature cement bond and casing integrity logging systems for geothermal wells with maximum temperatures in excess of 500/sup 0/F. The market is currently insufficient to warrannt the private investment necessary to develop tools and cables capable of withstanding high temperatures. It is concluded that a DOE-funded development program is required to assure that diagnostic tools are available in the interim until geothermal resource development activities are of sufficient magnitude to support developmental work on high temperature casing/cement logging capabilities by industry. This program should be similar to and complement the current DOE program for development of reservoir evaluation logging capabilities for hot wells. The appendices contain annotated bibliographies on the following: high temperature logging in general, cement integrity testing, cosing integrity testing, casing and cement failures, and special and protective treatment techniques. Also included are composite listing of references in alphabetical order by senior author.

Knutson,, C.K.; Boardman, C.R.

166

MODELING OF STATIC MINING SUBSIDENCE IN A NONLINEAR MEDIUM  

E-Print Network (OSTI)

Static Evaluation of Mining Subsidence," Rep. No. LBL-11356,MODELING OF STATIC MINING SUBSIDENCE IN A NONLINEAR MEDIUMMODELING OF STATIC MINING SUBSIDENCE IN A NONLINEAR ~lliDIUM

Ratigan, J.L.

2013-01-01T23:59:59.000Z

167

Numerical test of Polyakov loop models in high temperature SU(2)  

E-Print Network (OSTI)

We study the compatibility of effective mean-field models of the Polyakov loop for the deconfined phase of SU(N) pure gauge theories with lattice data obtained for the case of SU(2), in the temperature range T_c - 4.8 T_c.

Roberto Fiore; Pietro Giudice; Alessandro Papa

2004-09-07T23:59:59.000Z

168

Testing a Dynamical Model for Mid-Latitude Sea Surface Temperature Anomalies  

Science Conference Proceedings (OSTI)

A slab model of the oceanic mixed layer is used to predict the statistical characteristics of the sea surface temperature anomalies that are forced by day-to-day changes in air-sea fluxes in the presence of a mean current. Because of the short ...

Claude Frankignoul; Richard W. Reynolds

1983-07-01T23:59:59.000Z

169

Quality of Mobile Air Temperature and Atmospheric Pressure Observations from the 2010 Development Test Environment Experiment  

Science Conference Proceedings (OSTI)

The 2010 Development Test Environment Experiment (DTE10) took place from 28 January to 29 March 2010 in the Detroit, Michigan, metropolitan area for the purposes of collecting and evaluating mobile data from vehicles. To examine the quality of ...

Amanda R. S. Anderson; Michael Chapman; Sheldon D. Drobot; Alemu Tadesse; Brice Lambi; Gerry Wiener; Paul Pisano

2012-04-01T23:59:59.000Z

170

Static Slicing in the Presence of GOTO Statements  

E-Print Network (OSTI)

A static program slice is an extract of a program which can help our understanding of the behavior of the program; it has been proposed for use in debugging, optimization, parallelization, and integration of programs. This paper considers two types of static slices: executable and non-executable. Efficient and well-founded methods have been developed to construct executable slices for programs without goto statements; it would be tempting to assume these methods would apply as well in programs with arbitrary goto statements. In this paper, we show why previous methods do not work in this more general setting, and describe our solutions that correctly and efficiently compute executable slices for programs even with arbitrary goto statements. Our conclusion is that goto statements can be accommodated in generating executable static slices. Categories and Subject Descriptors: D.2.5 [Software Engineering]: Testing and Debugging --Debugging aids, D.2.6 [Software Engineering]: Programming En...

Jong-deok Choi; Jeanne Ferrante

1994-01-01T23:59:59.000Z

171

Static Analyzers in Software Engineering  

Science Conference Proceedings (OSTI)

... Testing also requires artifacts that are complete enough to be executable, possibly with supporting dri- vers, stubs, or simulated components. ...

2013-05-07T23:59:59.000Z

172

High-temperature electrical testing of a solid oxide fuel cell cathode contact material  

DOE Green Energy (OSTI)

The development of high temperature solid state devices for energy generation and environmental control applications has advanced remarkably over the past decade. However, there remain a number technical barriers that still impede widespread commercial application. One of these, for example, is the development of a robust method of conductively joining the mixed-conducting oxide electrodes that lie at the heart of the device to the heat resistant metal interconnect used to transmit power to or from the electrodes and electrochemically active membrane. In the present study, we have investigated the high-temperature electrical and microstructural characteristics of a series of conductive glass composite paste junctions between two contact materials representative of those employed in solid-state electrochemical devices, lanthanum calcium manganate and 430 stainless steel.

Weil, K. Scott

2004-06-01T23:59:59.000Z

173

Testing of Crystallization Temperature of a New Working Fluid for Absorption Heat Pump Systems  

SciTech Connect

Lithium bromide/water (LiBr/water) absorption systems are potential candidates for absorption heat pump water heating applications since they have been widely commercialized for cooling applications. One drawback to LiBr/water absorption water heater systems is that they are unable to operate at typical water heating temperatures due to solution crystallization hazards. Binary or ternary mixtures, serving as working fluids, were reported (Ally, 1988; Herold et al., 1991; Iyoki and Uemura, 1981; Yasuhide Nemoto et al., 2010; Zogg et al., 2005) to help improve the absorption performance or avoid crystallization of absorption heat pump systems. A recent development (De Lucas et al., 2007) investigated the use of a ternary mixture of aqueous mixture of lithium bromide and sodium formate (CHO2Na). The new working fluid composition maintains a ratio of LiBr/CHO2Na of 2 by weight. This new working fluid is a potential competitor to aqueous LiBr solution in absorption system due to higher water vapor absorption rates and lower generation temperature needed (De Lucas et al., 2004). There exists data on equilibrium performance and other physical properties of this new working fluid. However, there is no available data on crystallization behavior. Crystallization temperature is crucial for the design of absorption heat pump water heater in order to avoid crystallization hazards during operation. We have therefore conducted a systematic study to explore the crystallization temperature of LiBr/CHO2Na water solution and compared it against aqueous LiBr solutions. These results were then used to evaluate the feasibility of using the new working fluid in water heating applications showing limited potential.

Wang, Kai [ORNL; Kisari, Padmaja [ORNL; Abdelaziz, Omar [ORNL; Vineyard, Edward Allan [ORNL

2010-01-01T23:59:59.000Z

174

Standard test method for determining liquidus temperature of immobilized waste glasses and simulated waste glasses  

E-Print Network (OSTI)

1.1 These practices cover procedures for determining the liquidus temperature (TL) of nuclear waste, mixed nuclear waste, simulated nuclear waste, or hazardous waste glass in the temperature range from 600C to 1600C. This method differs from Practice C829 in that it employs additional methods to determine TL. TL is useful in waste glass plant operation, glass formulation, and melter design to determine the minimum temperature that must be maintained in a waste glass melt to make sure that crystallization does not occur or is below a particular constraint, for example, 1 volume % crystallinity or T1%. As of now, many institutions studying waste and simulated waste vitrification are not in agreement regarding this constraint (1). 1.2 Three methods are included, differing in (1) the type of equipment available to the analyst (that is, type of furnace and characterization equipment), (2) the quantity of glass available to the analyst, (3) the precision and accuracy desired for the measurement, and (4) candi...

American Society for Testing and Materials. Philadelphia

2011-01-01T23:59:59.000Z

175

High-temperature-staged fluidized-bed combustion (HITS), bench scale experimental test program conducted during 1980. Final report  

Science Conference Proceedings (OSTI)

An experimental program was conducted to evaluate the process feasibility of the first stage of the HITS two-stage coal combustion system. Tests were run in a small (12-in. ID) fluidized bed facility at the Energy Engineering Laboratory, Aerojet Energy Conversion Company, Sacramento, California. The first stage reactor was run with low (0.70%) and high (4.06%) sulfur coals with ash fusion temperatures of 2450/sup 0/ and 2220/sup 0/F, respectively. Limestone was used to scavenge the sulfur. The produced low-Btu gas was burned in a combustor. Bed temperature and inlet gas percent oxygen were varied in the course of testing. Key results are summarized as follows: the process was stable and readily controllable, and generated a free-flowing char product using coals with low (2220/sup 0/F) and high (2450/sup 0/F) ash fusion temperatures at bed temperatures of at least 1700/sup 0/ and 1800/sup 0/F, respectively; the gaseous product was found to have a total heating value of about 120 Btu/SCF at 1350/sup 0/F, and the practicality of cleaning the hot product gas and delivering it to the combustor was demonstrated; sulfur capture efficiencies above 80% were demonstrated for both low and high sulfur coals with a calcium/sulfur mole ratio of approximately two; gasification rates of about 5,000 SCF/ft/sup 2/-hr were obtained for coal input rates ranging from 40 to 135 lbm/hr, as required to maintain the desired bed temperatures; and the gaseous product yielded combustion temperatures in excess of 3000/sup 0/F when burned with preheated (900/sup 0/F) air. The above test results support the promise of the HITS system to provide a practical means of converting high sulfur coal to a clean gas for industrial applications. Sulfur capture, gas heating value, and gas production rate are all in the range required for an effective system. Planning is underway for additional testing of the system in the 12-in. fluid bed facility, including demonstration of the second stage char burnup reactor.

Anderson, R E; Jassowski, D M; Newton, R A; Rudnicki, M L

1981-04-01T23:59:59.000Z

176

Testing for the Possible Influence of Unknown Climate Forcings upon Global Temperature Increases from 1950-2000  

SciTech Connect

Global-scale variations in the climate system over the last half of the twentieth century, including long-term increases in global-mean near-surface temperatures, are consistent with concurrent human-induced emissions of radiatively active gases and aerosols. However, such consistency does not preclude the possible influence of other forcing agents, including internal modes of climate variability or unaccounted for aerosol effects. To test whether other unknown forcing agents may have contributed to multidecadal increases in global-mean near-surface temperatures from 1950 to 2000, data pertaining to observed changes in global-scale sea surface temperatures and observed changes in radiatively active atmospheric constituents are incorporated into numerical global climate models. Results indicate that the radiative forcing needed to produce the observed long-term trends in sea surface temperaturesand global-mean near-surface temperaturesis provided predominantly by known changes in greenhouse gases and aerosols. Further, results indicate that less than 10% of the long-term historical increase in global-mean near-surface temperatures over the last half of the twentieth century could have been the result of internal climate variability. In addition, they indicate that less than 25%of the total radiative forcing needed to produce the observed long-term trend in global-mean near-surface temperatures could have been provided by changes in net radiative forcing from unknown sources (either positive or negative). These results, which are derived from simple energy balance requirements, emphasize the important role humans have played in modifying the global climate over the last half of the twentieth century.

Anderson, Bruce T.; Knight, Jeff R.; Ringer, Mark A.; Yoon, Jin-Ho; Cherchi, Annalisa

2012-10-15T23:59:59.000Z

177

DESIGN CRITERIA FOR HIGH TEMPERATURE LATTICE TEST REACTOR PROJECT CAH-100  

SciTech Connect

Design and construction specifications to be followed in the development of the reactor, its associated systems and experimental facilities, and the housing and required services for the facility are presented. The testing procedures to be used are outlined. (D.C.W.)

Ballard, D.L.; Brown, W.W.; Harrison, C.W.; Heineman, R.E.; Henry, H.L.; Jeffs, T.W.; Morrow, G.W.; Russell, J.T.; Waite, J.K.

1963-05-24T23:59:59.000Z

178

QCD based static potential between heavy quarks  

SciTech Connect

We calculate the static potential between a quark-anti quark pair using dual potentials to describe long-distance Yang-Mills theory.

Baker, M. [Washington Univ., Seattle, WA (United States). Dept. of Physics; Ball, J.S. [Utah Univ., Salt Lake City, UT (United States). Dept. of Physics; Zachriasen, R. [California Inst. of Tech., Pasadena, CA (United States)

1991-12-31T23:59:59.000Z

179

High Temperature Superconducting Matrix Fault Current Limiter: Proof-of-Concept Test Results  

Science Conference Proceedings (OSTI)

This report describes the design and proof-of-concept test results of a pre-prototype superconducting fault current limiter (FCL). The device employs SuperPower's Matrix Fault Current Limiter (MFCL) technology and BSCCO-2212 bulk material manufactured by Nexans SuperConductors' melt cast processing (MCP) technique. The MFCL technology is targeted to address fault current over-duty problems at the transmission voltage level of 138kV and higher. In addition to EPRI sponsorship, this $12M development progra...

2004-09-27T23:59:59.000Z

180

On0Line Fuel Failure Monitor for Fuel Testing and Monitoring of Gas Cooled Very High Temperature Reactor  

Science Conference Proceedings (OSTI)

IVery High Temperature Reactors (VHTR) utilize the TRISO microsphere as the fundamental fuel unit in the core. The TRISO microsphere (~ 1- mm diameter) is composed of a UO2 kernel surrounded by a porous pyrolytic graphite buffer, an inner pyrolytic graphite layer, a silicon carbide (SiC) coating, and an outer pyrolytic graphite layer. The U-235 enrichment of the fuel is expected to range from 4% 10% (higher enrichments are also being considered). The layer/coating system that surrounds the UO2 kernel acts as the containment and main barrier against the environmental release of radioactivity. To understand better the behavior of this fuel under in-core conditions (e.g., high temperature, intense fast neutron flux, etc.), the US Department of Energy (DOE) is launching a fuel testing program that will take place at the Advanced Test Reactor (ATR) located at Idaho National Laboratory (INL). During this project North Carolina State University (NCSU) researchers will collaborate with INL staff for establishing an optimized system for fuel monitoring for the ATR tests. In addition, it is expected that the developed system and methods will be of general use for fuel failure monitoring in gas cooled VHTRs.

Ayman I. Hawari; Mohamed A. Bourham

2010-04-22T23:59:59.000Z

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181

Preservation of Laboratory Instruments in Static Storage  

SciTech Connect

It is desirable to place laboratory instruments in static storage so that they may be put into operation with only normal servicing. Such instruments may be subject to many forms of deterioration. There may be deterioration of metal parts due to chemical and electrolytic corrosion and the effects of moisture, excessive dryness, and microorganisms, i.e., mildew on organic parts. To preserve such instruments without disassembly or troublesome surface coatings, requires methods that will remove the major cause of deterioration - that is, excessive humidity, by reducing and maintaining the relative humidity of the air surrounding the item at 30 per cent or less. It is also necessary to eliminate or separate hygroscopic materials from the item since they will cause corrosion, by surface adsorption and condensation, even though a dry atmosphere is maintained. The methods and materials used must not only be efficient and economical but also require a minimun of maintenance, Protection against physical damage and temperature extremes is dependent upon the storage site and is not considered in this report.

Gregg, J. L.; Shackelford, M. A.

1950-02-22T23:59:59.000Z

182

Static Temperature Survey At Rio Grande Rift Region (Morgan,...  

Open Energy Info (EERE)

References Paul Morgan, Peter Barkmann, Charles Kluth, Matthew Sares (2010) Prospects For Electricity Generation In The San Luis Basin, Colorado, Usa Retrieved from "http:...

183

Static Temperature Survey At Fish Lake Valley Area (Deymonaz...  

Open Energy Info (EERE)

Jeffrey G. Hulen, Gregory D. Nash, Alex Schriener (2008) Esmeralda Energy Company Final Scientific Technical Report, January 2008, Emigrant Slimhole Drilling Project, Doe...

184

Temperature Dependence of Static Charging in Ice Growing by Riming  

Science Conference Proceedings (OSTI)

Charge transfer between colliding ice particles is measured using a wind tunnel inside a cold room. A cylinder growing by riming in a wind tunnel was used as a target for collisions between 5 and 6 m s?1 with ice spheres of 100-m diameter. The ...

Eldo E. Avila; Guillermo G. Aguirre Varela; Giorgio M. Caranti

1995-12-01T23:59:59.000Z

185

Temperature and vital effect controls on Bamboo coral (Isididae) isotopegeochemistry: A test of the "lines method"  

SciTech Connect

Deep-sea bamboo corals hold promise as long-term climatic archives, yet little information exists linking bamboo coral geochemistry to measured environmental parameters. This study focuses on a suite of 10 bamboo corals collected from the Pacific and Atlantic basins (250-2136 m water depth) to investigate coral longevity, growth rates, and isotopic signatures. Calcite samples for stable isotopes and radiocarbon were collected from the base the corals, where the entire history of growth is recorded. In three of the coral specimens, samples were also taken from an upper branch for comparison. Radiocarbon and growth band width analyses indicate that the skeletal calcite precipitates from ambient dissolved inorganic carbon and that the corals live for 150-300 years, with extension rates of 9-128 {micro}m/yr. A linear relationship between coral calcite {delta}{sup 18}O and {delta}{sup 13}C indicates that the isotopic composition is influenced by vital effects ({delta}{sup 18}O:{delta}{sup 13}C slope of 0.17-0.47). As with scleractinian deep-sea corals, the intercept from a linear regression of {delta}{sup 18}O versus {delta}{sup 13}C is a function of temperature, such that a reliable paleotemperature proxy can be obtained, using the 'lines method.' Although the coral calcite {delta}{sup 18}O:{delta}{sup 13}C slope is maintained throughout the coral base ontogeny, the branches and central cores of the bases exhibit {delta}{sup 18}O:{delta}{sup 13}C values that are shifted far from equilibrium. We find that a reliable intercept value can be derived from the {delta}{sup 18}O:{delta}{sup 13}C regression of multiple samples distributed throughout one specimen or from multiple samples within individual growth bands.

Hill, T M; Spero, H J; Guilderson, T P; LaVigne, M; Clague, D; Macalello, S; Jang, N

2011-03-01T23:59:59.000Z

186

High temperature testing of the EDCON borehole gravity housing system conducted at Los Alamos National Laboratories, January 12-18, 1986  

DOE Green Energy (OSTI)

A series of tests were conducted on the EDCON borehole gravity meter (BHGM) high temperature sonde. The tests were conducted to determine the suitability of this sonde for logging operations in the Department of Energy Salton Trough test well. 1 ref., 3 figs., 4 tabs.

Not Available

1986-01-01T23:59:59.000Z

187

Thermal Hydraulic Analysis of a Reduced Scale High Temperature Gas-Cooled Reactor Test Facility and its Prototype with MELCOR  

E-Print Network (OSTI)

Pursuant to the energy policy act of 2005, the High Temperature Gas-Cooled Reactor (HTGR) has been selected as the Very High Temperature Reactor (VHTR) that will become the Next Generation Nuclear Plant (NGNP). Although plans to build a demonstration plant at Idaho National Laboratories (INL) are currently on hold, a cooperative agreement on HTGR research between the U.S. Nuclear Regulatory Commission (NRC) and several academic investigators remains in place. One component of this agreement relates to validation of systems-level computer code modeling capabilities in anticipation of the eventual need to perform HTGR licensing analyses. Because the NRC has used MELCOR for LWR licensing in the past and because MELCOR was recently updated to include gas-cooled reactor physics models, MELCOR is among the system codes of interest in the cooperative agreement. The impetus for this thesis was a code-to-experiment validation study wherein MELCOR computer code predictions were to be benchmarked against experimental data from a reduced-scale HTGR testing apparatus called the High Temperature Test Facility (HTTF). For various reasons, HTTF data is not yet available from facility designers at Oregon State University, and hence the scope of this thesis was narrowed to include only computational studies of the HTTF and its prototype, General Atomics Modular High Temperature Gas-Cooled Reactor (MHTGR). Using the most complete literature references available for MHTGR design and using preliminary design information on the HTTF, MELCOR input decks for both systems were developed. Normal and off-normal system operating conditions were modeled via implementation of appropriate boundary and inititial conditions. MELCOR Predictions of system response for steady-state, pressurized conduction cool-down (PCC), and depressurized conduction cool-down (DCC) conditions were checked against nominal design parameters, physical intuition, and some computational results available from previous RELAP5-3D analyses at INL. All MELCOR input decks were successfully built and all scenarios were successfully modeled under certain assumptions. Given that the HTTF input deck is preliminary and was based on dated references, the results were altogether imperfect but encouraging since no indications of as yet unknown deficiencies in MELCOR modeling capability were observed. Researchers at TAMU are in a good position to revise the MELCOR models upon receipt of new information and to move forward with MELCOR-to-HTTF benchmarking when and if test data becomes available.

Beeny, Bradley 1988-

2012-12-01T23:59:59.000Z

188

Superheater/intermediate temperature airheater tube corrosion tests in the MHD Coal Fired Flow Facility (Eastern Coal Phase)  

DOE Green Energy (OSTI)

Corrosion data have been obtained for tub is exposed for 1500--2000 hours in a proof-of-concept magnetohydrodynamics (MHD) power generation test facility to conditions representative of superheater and intermediate temperature air heater (ITAH) components. The tubes, coated with K{sub 2}SO{sub 4}-rich deposits, were corroded more than in most pulverized coal fired superheater service, but much less than the highly aggressive liquid phase attack encountered in conventional plants with certain coals and temperatures. Results indicated that, with parabolic corrosion kinetics, type 310 and 253MA stainless steels should be usable to 1400F at hot end of ITAH. At final superheater temperatures, 2.25 and 5 Cr steels were indicated to have parabolic corrosion rates generally below a 0.5 mm/yr criterion, based on corrosion scale thickness. However, unknown amounts of scale loss from spallation made this determination uncertain. Stainless steels 304H, 316H, and 321H had parabolic rates variably above the criterion, but may be servicable under less cyclic conditions. Corrosion rates derived from scale thickness and intergranular corrosion depth measurements are reported, along with scale morphologies and compositions. Implications of results on commercial MHD utilization of the alloys are discussed, as well as the indicated need for more corrosion resistant alloys or coatings under the most severe exposure conditions.

White, M.K.

1993-11-01T23:59:59.000Z

189

Static solutions for fourth order gravity  

SciTech Connect

The Lichnerowicz and Israel theorems are extended to higher order theories of gravity. In particular it is shown that Schwarzschild is the unique spherically symmetric, static, asymptotically flat, black-hole solution, provided the spatial curvature is less than the quantum gravity scale outside the horizon. It is then shown that in the presence of matter (satisfying certain positivity requirements), the only static and asymptotically flat solutions of general relativity that are also solutions of higher order gravity are the vacuum solutions.

Nelson, William [Institute of Gravitation and the Cosmos, Penn State University, State College, Pennsylvania 16801 (United States)

2010-11-15T23:59:59.000Z

190

New Sensors for In-Pile Temperature Measurement at the Advanced Test Reactor National Scientific User Facility  

SciTech Connect

The U.S. Department of Energy (DOE) designated the Advanced Test Reactor (ATR) a National Scientific User Facility (NSUF) in April 2007 to support U.S. research in nuclear science and technology. As a user facility, the ATR is supporting new users from universities, laboratories, and industry, as they conduct basic and applied nuclear research and development to advance the nations energy security needs. A key component of the ATR NSUF effort is to develop and evaluate new in-pile instrumentation techniques that are capable of providing measurements of key parameters during irradiation. This paper describes the strategy for determining what instrumentation is needed and the program for developing new or enhanced sensors that can address these needs. Accomplishments from this program are illustrated by describing new sensors now available and under development for in-pile detection of temperature at various irradiation locations in the ATR.

J. L. Rempe; D. L. Knudson; J. E. Daw; K. G. Condie

2011-09-01T23:59:59.000Z

191

TEST  

Science Conference Proceedings (OSTI)

This is an abstract. TEST Lorem ipsum dolor sit amet, consectetur adipiscing elit. Cras lacinia dui et est venenatis lacinia. Vestibulum lacus dolor, adipiscing id mattis sit amet, ultricies sed purus. Nulla consectetur aliquet feugiat. Maecenas ips

192

Code verification by static analysis: a mathematical programming ...  

E-Print Network (OSTI)

Code verification by static analysis: a mathematical ... One of the most important verification techniques is static code analysis by abstract ...... verif-instances.zip.

193

Temperature Effect on Pump Oil and Alkanes Evaporation Nathaniel A. Waldstein and Alex A. Volinsky  

E-Print Network (OSTI)

Temperature Effect on Pump Oil and Alkanes Evaporation Nathaniel A. Waldstein and Alex A. Volinsky rates of pump oil and several alkanes, which have a wide range of applications. Both static and dynamic systems. Pump oil was also evaporated from two types of microchannels. Developed testing procedures help

Volinsky, Alex A.

194

Irradiation dose and temperature dependence of fracture toughness in high dose HT9 steel from the fuel duct of FFTF  

SciTech Connect

Static fracture toughness tests have been performed for high dose HT9 steel using miniature disk compact tension (DCT) specimens to expand the knowledge base for fast reactor core materials. The HT9 steel DCT specimens were from the ACO-3 duct of the Fast Flux Test Facility (FFTF), which achieved high doses in the range of 3 148 dpa at 378 504oC. The static fracture resistance (J-R) tests have been performed in a servohydraulic testing machine in vacuum at selected temperatures including room temperature, 200 C, and each irradiation temperature. Brittle fracture with a low toughness less than 50 MPa m occurred in room temperature tests when irradiation temperature was below 400 C, while ductile fracture with stable crack growth was observed in all tests at higher irradiation temperatures. No fracture toughness less than 100 MPa m was measured when the irradiation temperature was above 430 C. It was shown that the influence of irradiation temperature was dominant in fracture toughness while the irradiation dose has only limited influence over the dose range 3 148 dpa. A post upper-shelf behavior was observed for the non-irradiated and high temperature (>430 C) irradiation cases, which indicates that the ductile-brittle transition temperatures (DBTTs) in those conditions are lower than room temperature. A comparison with the collection of existing data confirmed the dominance of irradiation temperature in the fracture toughness of HT9 steels.

Byun, Thak Sang [ORNL; Toloczko, M [Pacific Northwest National Laboratory (PNNL); Maloy, S [Los Alamos National Laboratory (LANL)

2012-01-01T23:59:59.000Z

195

Structural Testing  

DOE Green Energy (OSTI)

Structural testing at the National Wind Technology Center (NWTC) offers many benefits to wind turbine companies. NWTC includes a new high bay large enough to test any blade expected during the next 5 years. (There are four test bays.) In 1995, NWTC developed a saphisticated data acquisition system, known as the Blade Structural Testing Real-time Acquisition Interface Network (BSTRAIN), to monitor structural testing through 24-hour continuous video surveillance. NWTC recommends ultimate static-strength and fatigue testing, with nondestructive testing in some cases (vibrational testing is covered in a separate information sheet).

NONE

1996-06-01T23:59:59.000Z

196

Antiprotonic hydrogen in static electric field  

E-Print Network (OSTI)

Effects of the static electric field on the splitting and annihilation widths of the levels of antiprotonic hydrogen with a large principal quantum number (n=30) are studied. Non-trivial aspects of the consideration is related with instability of (p\\bar{p})^*-atom in ns and np-states due to coupling of these states with the annihilation channels. Properties of the mixed nl-levels are investigated depending on the value of external static electric field. Specific resonance-like dependence of effective annihilation widths on the strength of the field is revealed.

G. Ya. Korenman; S. N. Yudin

2005-01-12T23:59:59.000Z

197

Sawja: Static Analysis Workshop for Java  

E-Print Network (OSTI)

Static analysis is a powerful technique for automatic verification of programs but raises major engineering challenges when developing a full-fledged analyzer for a realistic language such as Java. This paper describes the Sawja library: a static analysis framework fully compliant with Java 6 which provides OCaml modules for efficiently manipulating Java bytecode programs. We present the main features of the library, including (i) efficient functional data-structures for representing program with implicit sharing and lazy parsing, (ii) an intermediate stack-less representation, and (iii) fast computation and manipulation of complete programs.

Hubert, Laurent; Besson, Frdric; Demange, Delphine; Jensen, Thomas; Monfort, Vincent; Pichardie, David; Turpin, Tiphaine

2010-01-01T23:59:59.000Z

198

High-Temperature-Turbine Technology Program: Phase II. Technology test and support studies. Design and development of the liquid-fueled high-temperature combustor for the Turbine Spool Technology Rig  

SciTech Connect

The concept selected by Curtiss-Wright for this DOE sponsored High Temperature Turbine Technology (HTTT) Program utilizes transpiration air-cooling of the turbine subsystem airfoils. With moderate quantities of cooling air, this method of cooling has been demonstrated to be effective in a 2600 to 3000/sup 0/F gas stream. Test results show that transpiration air-cooling also protects turbine components from the aggressive environment produced by the combustion of coal-derived fuels. A new single-stage, high work transpiration air-cooled turbine has been designed and fabricated for evaluation in a rotating test vehicle designated the Turbine Spool Technology Rig (TSTR). The design and development of the annular combustor for the TSTR are described. Some pertinent design characteristics of the combustor are: fuel, Jet A; inlet temperature, 525/sup 0/F; inlet pressure, 7.5 Atm; temperature rise, 2475/sup 0/F; efficiency, 98.5%; exit temperature pattern, 0.25; and exit mass flow, 92.7 pps. The development program was conducted on a 60/sup 0/ sector of the full-round annular combustor. Most design goals were achieved, with the exception of the peak gas exit temperature and local metal temperatures at the rear of the inner liner, both of which were higher than the design values. Subsequent turbine vane cascade testing established the need to reduce both the peak gas temperature (for optimum vane cooling) and the inner liner metal temperature (for combustor durability). Further development of the 60/sup 0/ combustor sector achieved the required temperature reductions and the final configuration was incorporated in the TSTR full-annular burner.

1981-06-01T23:59:59.000Z

199

Arbitrary body segmentation in static images  

Science Conference Proceedings (OSTI)

In this paper, a novel method for segmenting arbitrary human body in static images is proposed. With the body probability map obtained by the pictorial structure model, we develop a superpixel based EM-like algorithm to refine the map, which can then ... Keywords: l1 based graph cuts, Pictorial structure, Superpixel based EM algorithm

Shifeng Li; Huchuan Lu; Lei Zhang

2012-09-01T23:59:59.000Z

200

A Pen Based Statics Tutoring System  

E-Print Network (OSTI)

and the instructional design implemented in the system wasinstructional tools. Our statics tutoring system, called Newtons Pen II (NP2), employs a novel instructional design.system boundary is a critical part of the NP2s instructional design.

Lee, Chia-Keng

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "test static temperature" 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

Exploiting Statically Schedulable Regions in Dataflow Programs  

Science Conference Proceedings (OSTI)

Dataflow descriptions have been used in a wide range of Digital Signal Processing (DSP) applications, such as multi-media processing, and wireless communications. Among various forms of dataflow modeling, Synchronous Dataflow (SDF) is geared towards ... Keywords: Cal, DIF, Dataflow, Multicore processors, Quasi-static scheduling

Ruirui Gu; Jrn W. Janneck; Mickal Raulet; Shuvra S. Bhattacharyya

2011-04-01T23:59:59.000Z

202

XML access control using static analysis  

Science Conference Proceedings (OSTI)

Access control policies for XML typically use regular path expressions such as XPath for specifying the objects for access-control policies. However such access-control policies are burdens to the query engines for XML documents. To relieve this burden, ... Keywords: Access control, XML, XPath, XQuery, automaton, query optimization, schema, static analysis, value-based access control, view schema

Makoto Murata; Akihiko Tozawa; Michiharu Kudo; Satoshi Hada

2006-08-01T23:59:59.000Z

203

Estimation of host rock thermal conductivities using the temperature data from the drift-scale test at Yucca Mountain, Nevada  

E-Print Network (OSTI)

the wing heaters, and the RTD temperature holes in the DSTtemperature devices (RTD) placed in 26 boreholes (Borehole

Mukhopadhyay, Sumitra; Tsang, Y.W.

2008-01-01T23:59:59.000Z

204

Estimation of host rock thermal conductivities using the temperature data from the drift-scale test at Yucca Mountain, Nevada  

E-Print Network (OSTI)

the Drift Scale Test at Yucca Mountain, Nevada, Journal ofunsaturated model of Yucca Mountain, Nevada, Journal ofE. , and Spycher, N. , Yucca Mountain single heater test

Mukhopadhyay, Sumitra; Tsang, Y.W.

2008-01-01T23:59:59.000Z

205

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

206

Metal Mesh Foil Bearings: Prediction and Measurement for Static and Dynamic Performance Characteristics  

E-Print Network (OSTI)

Gas bearings in oil-free micro-turbomachinery for process gas applications and for power generation (< 400 kW) must offer adequate load capacity and thermal stability, reliable rotordynamic performance at high speeds and temperatures, low power losses and minimal maintenance costs. The metal mesh foil bearing (MMFB) is a promising foil bearing technology offering inexpensive manufacturing cost, large inherent material energy dissipation mechanism, and custom-tailored stiffness and damping properties. This dissertation presents predictions and measurements of the dynamic forced performance of various high speed and high temperature MMFBs. MMFB forced performance depends mainly on its elastic support structure, consisting of arcuate metal mesh pads and a smooth top foil. The analysis models the top foil as a 2D finite element (FE) shell supported uniformly by a metal mesh under-layer. The solution of the structural FE model coupled with a gas film model, governed by the Reynolds equation, delivers the pressure distribution over the top foil and thus the load reaction. A perturbation analysis further renders the dynamic stiffness and damping coefficients for the bearing. The static and dynamic performance predictions are validated against limited published experimental data. A one-to-one comparison of the static and dynamic forced performance characteristics of a MMFB against a Generation I bump foil bearing (BFB) of similar size, with a slenderness ratio L/D=1.04, showcases the comparative performance of MMFB against a commercially available gas foil bearing design. The measurements of rotor lift-off speed and drag friction at start-up and airborne conditions are conducted for rotor speeds up to 70 krpm and under identical specific loads (W/LD =0.06 to 0.26 bar). The dynamic force coefficients of the bearings are estimated, in a floating bearing type test rig, while floating atop a journal spinning to speeds as high as 50 krpm and with controlled static loads (22 N) applied in the vertical direction. The parameter identification is conducted in the frequency range of 200-400 Hz first, and then up to 600 Hz using higher load capacity shakers. A finite element rotordynamic program (XLTRC2) models a hollow rotor and two MMFBs supporting it and predict the synchronous rotor response for known imbalances. The predictions agree well with the ambient temperature rotor response measurements. Extensive rotor response measurements and rotor and bearing temperature measurements, with a coil heater warming up to 200 C and placed inside the hollow rotor, reveal the importance of adequate thermal management. The database of high speed high temperature performance measurements and the development of a predictive tool will aid in the design and deployment of MMFBs in commercial high-speed turbomachinery. The work presented in the dissertation is a cornerstone for future analytical developments and further testing of practical MMFBs.

Chirathadam, Thomas

2012-12-01T23:59:59.000Z

207

Long-term testing  

SciTech Connect

Land-based gas turbines are significantly different from automotive gas turbines in that they are designed to operate for 50,000 h or greater (compared to 5,000--10,000 h). The primary goal of this research is to determine the long-term survivability of ceramic materials for industrial gas turbine applications. Research activities in this program focus on the evaluation of the static tensile creep and stress rupture (SR) behavior of three commercially available structural ceramics which have been identified by the gas turbine manufacturers as leading candidates for use in industrial gas turbines. For each material investigated, a minimum of three temperatures and four stresses will be used to establish the stress and temperature sensitivities of the creep and SR behavior. Because existing data for many candidate structural ceramics are limited to testing times less than 2,000 h, this program will focus on extending these data to times on the order of 10,000 h, which represents the lower limit of operating time anticipated for ceramic blades and vanes in gas turbine engines. A secondary goal of the program will be to investigate the possibility of enhancing life prediction estimates by combining interrupted tensile SR tests and tensile dynamic fatigue tests in which tensile strength is measured as a function of stressing rate. The third goal of this program will be to investigate the effects of water vapor upon the SR behavior of the three structural ceramics chosen for the static tensile studies by measuring the flexural strength as a function of stressing rate at three temperatures.

Ferber, M.; Graves, G.A. Jr.

1994-12-31T23:59:59.000Z

208

Analysis of static and quasi-static cross compound parabolic concentrators  

SciTech Connect

Static and quasi-static concentrators present interesting characteristics for obtaining photovoltaic solar energy. In this work we study the characteristics of the crossed compound parabolic concentrator, formed by the intersection of two cyclindrical compound parabolic concentrators (CPC). Bifacial cells are used in this concentrator as a requirement for obtaining higher concentrations. Static and quasi-static concentrators see the sun as an extended source, so a simplified source model of radiance for the sky of Madrid is used. The figures of merit of a lossless concentrator are studied and the most important parameters influencing its optical behavior are discussed. We conclude that these concentrators obtain results that lead to a decrease in the cost of photovoltaic energy.

Molledo, A.G.; Luque, A.

1984-06-15T23:59:59.000Z

209

Lifetime Test of a Partial Model of a High-Temperature Gas-Cooled Reactor Helium-Helium Heat Exchanger  

Science Conference Proceedings (OSTI)

H. Design Codes and Life Prediction / Status of Metallic Materials Development for Application in Advanced High-Temperature Gas-Cooled Reactor / Material

Masaki Kitagawa; Hiroshi Hattori; Akira Ohtomo; Tetsuo Teramae; Junichi Hamanaka; Hiroshi Ukikusa

210

Frostbite Theater - Static Electricity Experiments - Polar Molecules  

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

Big Sparks, Little Sparks! Big Sparks, Little Sparks! Previous Video (Big Sparks, Little Sparks!) Frostbite Theater Main Index Next Video (Static Electricity and Bubbles!) Static Electricity and Bubbles! Polar Molecules What happens when an electrically charged object is brought near a stream of water? This is an easy experiment you can do yourself that shows that water molecules are polar! [ Show Transcript ] Announcer: Frostbite Theater presents... Cold Cuts! No baloney! Joanna and Steve: Just science! Joanna: Hi! I'm Joanna! Steve: And I'm Steve! Joanna: And this is a piece of PVC pipe! Steve: And this is a plastic cup that has a hole drilled into the bottom of it. So, when I fill it with water, it leaks out of the bottom. Joanna: If I charge the pipe, and then bring it close to the stream of

211

Life Extension Guidelines for Static VAR Compensators  

Science Conference Proceedings (OSTI)

The static volt-ampere-reactive (VAR) compensator (SVC) was first introduced in the early 1960s in the form of mechanically switched saturated reactors and capacitors. In the 1970s, thyristor-controlled reactors and capacitors were introduced, overcoming technical limitations of saturable reactors by offering dynamic switching. As with many other parts of the utility infrastructure, these SVCs are reaching the end of their service lifetime. Owners/operators need help making maintenance and replacement/re...

2009-11-06T23:59:59.000Z

212

Static properties and multiaxial strength criterion for design of composite automotive structures  

DOE Green Energy (OSTI)

The Durability of Lightweight Composite Structures Project was established at Oak Ridge National Laboratory (ORNL) by the US Department of Energy to provide the experimentally-based, durability-driven design guidelines necessary to assure long-term structural integrity of automotive composite components. The initial focus of the ORNL Durability Project was on one representative reference material -- an isocyanurate (polyurethane) reinforced with continuous strand, swirl-mat E-glass. The present paper describes tensile, compressive, flexure, and shear testing and results for the reference composite. Behavioral trends and proportional limit are established for both tension and compression. Damage development due to tensile loading, strain rate effects, and effects of temperature are discussed. Furthermore, effects on static properties of various fluids, including water at room and elevated temperatures, salt water, antifreeze, windshield washer fluid, used motor oil, battery acid, gasoline, and brake fluid, were investigated. Effects of prior loading were evaluated as well. Finally, the effect of multiaxial loading on strength was determined, and the maximum shear strength criterion was identified for design.

Ruggles, M.B.; Yahr, G.T.; Battiste, R.L.

1998-11-01T23:59:59.000Z

213

Static Scale Conversion Weigh-In-Motion System  

Science Conference Proceedings (OSTI)

In support of the Air Mobility Battle Lab (AMBL), the Defense Advanced Research Projects Agency (DARPA) Advanced Logistics Program and the U. S. Transportation Command (USTRANSCOM), the ultimate objective of this project is to develop and demonstrate a full-scale prototype static scale conversion weigh-in-motion/Profilometry (SSC-WIM/P) system to measure and record dimensional and weight information for the Department of Defense (DoD) equipment and cargo. The Oak Ridge National Laboratory (ORNL), along with the AMBL, and Intercomp, Inc. have developed a long-range plan for developing a dual-use system which can be used as a standard static scale or an accurate weigh-in-motion system. AMBL will work to define requirements for additional activities with U.S. Transportation Command, Air Mobility Command, and the Joint Warfighting Battle Lab for both the SSC-WIM/P and a portable Weigh-in-Motion System for individual units. The funding goal is to fully fund the development of two prototype test articles (a SSC-WIM kit, and a laser profilometer) and have at least one fully operational system by the early 2002 timeframe. The objective of this portion of the project will be to develop a SSC-WIM system, which at a later date can be fully integrated with a profilometry system; to fully characterize DOD wheeled vehicles and cargo (individual axle weights, total vehicle weight, center of balance, height, width and length measurements). The program will be completed in phases with the initial AMBL/DARPA funding being used to initiate the efforts while AMBL/USTC obtains funding to complete the first generation system effort. At the completion of an initial effort, the interface hardware and the data acquisition/analysis hardware will be developed, fabricated, and system principles and basic functionality evaluated, tested, and demonstrated. Additional funding, when made available, will allow the successful completion of a first generation prototype system. This effort will be followed by a fully optimized system to be developed, tested and made ready for commercialization in the FY-2002 timeframe. A further objective of this program will be to bring several DOD organizations together for a common goal, leverage private industry resources and funds, and utilize Tennessee Department of Transportation facilities and support personnel to augment the cost of testing and evaluation activities performed by ORNL. The specific objectives of this initial program were to: (1) Define, develop, and fabricate the initial building block system hardware and software, (2) Demonstrate system principles and basic functionality while interfacing with representative static scales and thereby, validate the static scale conversion concept, (3) Survey up to eight prominent Army and Air Force power projection bases for type and design of the existing static scales and determine if the scales can be converted to a SSC-WIM system, and (4) Document these efforts and findings in a final report and provide cost, schedule, and performance planning data for a follow-on production program.

Beshears, D.L.

2001-05-18T23:59:59.000Z

214

Modeling Tropical Convergence Based on the Moist Static Energy Budget  

Science Conference Proceedings (OSTI)

The vertically integrated moist static energy equation provides a convenient starting point for the construction of simple models of the time-mean low level convergence in the tropics. A vertically integrated measure of the moist static stability,...

J. David Neelin; Isaac M. Held

1987-01-01T23:59:59.000Z

215

On the Information Loss in Static Systems  

E-Print Network (OSTI)

In this work we give a concise definition of information loss from a system-theoretic point of view. Based on this definition, we analyze the information loss in static input-output systems subject to a continuous-valued input. For a certain class of multiple-input, multiple-output systems the information loss is quantified. An interpretation of this loss is accompanied by upper bounds which are simple to evaluate. Finally, a class of systems is identified for which the information loss is necessarily infinite. Quantizers and limiters are shown to belong to this class.

Geiger, Bernhard C

2011-01-01T23:59:59.000Z

216

Computer simulation of static localization cues  

Science Conference Proceedings (OSTI)

A system for imposing static (fixed?head) localization cues on an artificial sound source is described. The system is based on the measurement of the peripheral binaural impulse responses at a series of target source positions using small microphones in the subject's ear canals. A computer with associated waveform processing software convolves these impulse responses with widehand noise bursts and plays the results to the subject over headphones. The headphone impulse responses are also measured and deconvolved out of the waveforms in advance by the computer. Both live and simulated localization trials have been carried out

Mark F. Davis

1980-01-01T23:59:59.000Z

217

Production test IP-278-A: Verification of BPA loss bulk temperature surge at the DE-Reactor. Supplement A  

SciTech Connect

This report details planning to run a second outage test at the DR-Reactor using the same instrumentation and procedure as an earlier test but increasing the trip-out level from 800 MW up to a maximum of 1200 MW.

Jones, S.S.

1960-01-07T23:59:59.000Z

218

Using static analysis in space: why doing so?  

Science Conference Proceedings (OSTI)

This paper presents the point of view of an industrial company of the space domain on static analysis. It first discusses the compatibility of static analysis with the standards applicable for the development of critical embedded software in the European ... Keywords: industrial space software, static analysis

David Lesens

2010-09-01T23:59:59.000Z

219

Static electricity measurements for lightning warnings -an exploration  

E-Print Network (OSTI)

Static electricity measurements for lightning warnings - an exploration H. Bloemink De Bilt, 2013 | Internal report; IR 2013-01 #12;#12;Static electricity measurements for lightning warnings - an exploration Version 1.0 Date January 2013 Status Final #12;#12;Static electricity measurements for lightning warnings

Haak, Hein

220

Testing for the Possible Influence of Unknown Climate Forcings upon Global Temperature Increases from 1950 to 2000  

Science Conference Proceedings (OSTI)

Global-scale variations in the climate system over the last half of the twentieth century, including long-term increases in global-mean near-surface temperatures, are consistent with concurrent human-induced emissions of radiatively active gases ...

Bruce T. Anderson; Jeff R. Knight; Mark A. Ringer; Jin-Ho Yoon; Annalisa Cherchi

2012-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "test static temperature" 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

The Effects of Test Temperature, Temper, and Alloyed Copper on the Hydrogen-Controlled Crack Growth Rate of an Al-Zn-Mg-(Cu) Alloy  

DOE Green Energy (OSTI)

The hydrogen embrittlement controlled stage II crack growth rate of AA 7050 (6.09 wt.% Zn, 2.14 wt% Mg, 2.19 wt.% Cu) was investigated as a function of temper and alloyed copper level in a humid air environment at various temperatures. Three tempers representing the underaged, peak aged, and overaged conditions were tested in 90% relative humidity (RH) air at temperatures between 25 and 90 C. At all test temperatures, an increased degree of aging (from underaged to overaged) produced slower stage II crack growth rates. The stage II crack growth rate of each alloy and temper displayed Arrhenius-type temperature dependence with activation energies between 58 and 99 kJ/mol. For both the normal copper and low copper alloys, the fracture path was predominantly intergranular at all test temperatures (25-90 C) in each temper investigated. Comparison of the stage II crack growth rates for normal (2.19 wt.%) and low (0.06 wt.%) copper alloys in the peak aged and overaged tempers showed the beneficial effect of copper additions on stage II crack growth rate in humid air. In the 2.19 wt.% copper alloy, the significant decrease ({approx} 10 times at 25 C) in stage II crack growth rate upon overaging is attributed to an increase in the apparent activation energy for crack growth. IN the 0.06 wt.% copper alloy, overaging did not increase the activation energy for crack growth but did lower the pre-exponential factor, {nu}{sub 0}, resulting in a modest ({approx} 2.5 times at 25 C) decrease in crack growth rate. These results indicate that alloyed copper and thermal aging affect the kinetic factors that govern stage II crack growth rate. Overaged, copper bearing alloys are not intrinsically immune to hydrogen environment assisted cracking but are more resistant due to an increased apparent activation energy for stage II crack growth.

G.A. Young, Jr.; J.R. Scully

2000-09-17T23:59:59.000Z

222

Impacts of Static Pressure Set Level on the HVAC Energy Consumption and Indoor Conditions  

E-Print Network (OSTI)

Air static pressure must be maintained at a certain level leaving the air-handing unit (AHU) to force a suitable amount of air through the terminal boxes. However, an excessive static pressure level is often used due to ( 1 ) lack of a control device in a constant volume system (CV); (2) malfunctioning control device in a variable volume (VAV) system; and (3) fear of failure to maintain room temperature. High static pressure often develops excessive damper leakage in older mixing boxes. This results in an inappropriate mixing of hot and cold air and an excessive amount of air entering the space. Consequently, the actual fan power, heating and cooling energy consumption all become significantly higher than the design values. Even worse, the system may not be able to maintain room conditions due to unwanted simultaneous heating and cooling, and may be noisy due to the excessive static pressure. This paper proposes to control the hot duct pressure and the Variable Frequency Drives ( VFD's) to control the fan static i.e. the cold duct pressure. Both a theoretical analysis and a case study results are presented in this paper.

Liu, M.; Zhu, Y.; Claridge, D. E.; White, E.

1996-01-01T23:59:59.000Z

223

Non-Employee Static Magnetic Field Questionnaire  

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

Occupational Medicine Clinic (OMC) Occupational Medicine Clinic (OMC) Medical Questionnaire for non-BSA Workers/Students who may enter STATIC MAGNETIC FIELDS NAME:_________________ Extension__________ BNL Badge #:_____________ BNL Supervisor_____________ INSTRUCTIONS TO BSA SUPERVISOR or PRECEPTOR: Please print this form and give it to the (non-BSA employee) worker or student for completion. This individual should not give you the completed form, but should instead mail or fax it to OMC. INSTRUCTIONS TO WORKER or STUDENT: The purpose of this questionnaire is to provide the OMC physician at BNL with information about any medical devices or conditions you may have that might affect your ability to safely enter a strong magnetic field, in order to determine whether you can be medically cleared to enter such a field.

224

Verification test problems for the calculation of probability of loss of assured safety in temperature-dependent systems with multiple weak and strong links.  

SciTech Connect

Four verification test problems are presented for checking the conceptual development and computational implementation of calculations to determine the probability of loss of assured safety (PLOAS) in temperature-dependent systems with multiple weak links (WLs) and strong links (SLs). The problems are designed to test results obtained with the following definitions of loss of assured safety: (1) Failure of all SLs before failure of any WL, (2) Failure of any SL before failure of any WL, (3) Failure of all SLs before failure of all WLs, and (4) Failure of any SL before failure of all WLs. The test problems are based on assuming the same failure properties for all links, which results in problems that have the desirable properties of fully exercising the numerical integration procedures required in the evaluation of PLOAS and also possessing simple algebraic representations for PLOAS that can be used for verification of the analysis.

Johnson, Jay Dean (ProStat, Mesa, AZ); Oberkampf, William Louis; Helton, Jon Craig (Arizona State University, Tempe, AZ)

2006-06-01T23:59:59.000Z

225

TEST RESULTS OF HIGH TEMPERATURE STEAM/CO2 CO-ELECTROLYSIS IN A 10-CELL STACK  

DOE Green Energy (OSTI)

High temperature coelectrolysis experiments with CO2 / H2O mixtures were performed in a 10-cell planar solid oxide stack. Results indicated that stack apparent ASR values were shown not to vary significantly between pure steam electrolysis and steam / CO2 coelectrolysis values. Product gas compositions measured via an online micro gas chromatograph (GC) showed excellent agreement to predictions obtained from a chemical equilibrium coelectrolysis model developed for this study. Experimentally determined open cell potentials and thermal neutral voltages for coelectrolysis compared favorably to predictions obtained from a chemical equilibrium coelectrolysis and energy balance model, also developed for this study.

James E. O'Brien; Joseph J. Hartvigsen

2007-06-01T23:59:59.000Z

226

Impacts of Static Pressure Reset on VAV System Air Leakage, Fan Power and Thermal Energy - Part I: Theoretical Model and Simulation  

E-Print Network (OSTI)

As for a variable air volume (VAV) system, the air duct static pressure is a typical control variable maintained by modulating supply fan speed. The static pressure equals to the summation of the duct pressure loss downstream of the sensor to the terminal box and box inlet static pressure. Typically, the air duct static pressure is set as a constant set point based on the system design information and sensor location. However, under partial load conditions, the terminal box dampers have to be closed more since either required airflow is less than the design airflow which directly leads to much less pressure loss. Thus the static pressure set point should be reset lower in order to reduce fan power, avoid noise at terminal box dampers and box damper malfunction due to excessive pressure. Different static pressure reset schedules are reviewed and compared, considering the influence of outside air temperature on the building load, availability of the VAV box damper positions, the airflow ratio based static pressure reset has also applicable advantages over the existing constant static pressure set point and two typical reset methods. This paper present the theoretical models to express the impacts of static pressure reset on fan airflow, fan head, air leakage, fan power and thermal energy for both pressure independent and pressure dependent boxes. The impacts are also demonstrated using the parametric analysis and numerical results to show the benefits of the static pressure reset including reducing fan power, cooling energy and heating energy.

Liu, M.; Feng, J.; Wang, Z.; Wu, L.; Zheng, K.; Pang, W.

2007-01-01T23:59:59.000Z

227

Flow Test At Coso Geothermal Area (1978) | Open Energy Information  

Open Energy Info (EERE)

Flow Test At Coso Geothermal Area (1978) Flow Test At Coso Geothermal Area (1978) Exploration Activity Details Location Coso Geothermal Area Exploration Technique Flow Test Activity Date 1978 Usefulness not indicated DOE-funding Unknown Notes Flow tests of well CGEH No. 1 were conducted. LBL performed eight temperature surveys after completion of the well to estimate equilibrium reservoir temperatures. Downhole fluid samples were obtained by the U.S. Geological Survey (USGS) and Lawrence Berkeley Laboratory (LBL), and a static pressure profile was obtained. The first test began September 5, 1978 using nitrogen stimulation to initiate flow; this procedure resulted in small flow and subsequent filling of the bottom hole with drill cuttings. The second test, on November 2, 1978, utilized a nitrogen-foam-water mixture to clean residual particles from bottom hole,

228

Design of an Online Fission Gas Monitoring System for Post-irradiation Examination Heating Tests of Coated Fuel Particles for High-Temperature Gas-Cooled Reactors  

Science Conference Proceedings (OSTI)

A new Fission Gas Monitoring System (FGMS) has been designed at the Idaho National Laboratory (INL) for use of monitoring online fission gas-released during fuel heating tests. The FGMS will be used with the Fuel Accident Condition Simulator (FACS) at the Hot Fuels Examination Facility (HFEF) located at the Materials and Fuels Complex (MFC) within the INL campus. Preselected Advanced Gas Reactor (AGR) TRISO (Tri-isotropic) fuel compacts will undergo testing to assess the fission product retention characteristics under high temperature accident conditions. The FACS furnace will heat the fuel to temperatures up to 2,000C in a helium atmosphere. Released fission products such as Kr and Xe isotopes will be transported downstream to the FGMS where they will accumulate in cryogenically cooledcollection traps and monitored with High Purity Germanium (HPGe) detectors during the heating process. Special INL developed software will be used to monitor the accumulated fission products and will report data in near real-time. These data will then be reported in a form that can be readily available to the INL reporting database. This paper describes the details of the FGMS design, the control and acqusition software, system calibration, and the expected performance of the FGMS. Preliminary online data may be available for presentation at the High Temperature Reactor (HTR) conference.

Dawn Scates

2010-10-01T23:59:59.000Z

229

WOOD-BASED PRODUCTS TEST METHOD SELECTION ...  

Science Conference Proceedings (OSTI)

... Static Load Testing of Framed Floor or Roof Diaphragm Constructions for ... C273 Shear Properties in Flatwise Plane of Flat Sandwich Constructions ...

2011-09-21T23:59:59.000Z

230

Mapping of a reactor coolant effluent ground disposal test using an infrared imaging system and ground water potential and temperature measurements  

SciTech Connect

The concept of reactor effluent disposal to ground in infiltration trenches was proposed by Nelson and Alkire in 1963. At that time the available data indicated that radionuclide infiltration rates were probably adequate for trench disposal and that decontamination factors of 10 to 100 should be obtainable. Field tests at 100-F Area 1965 and 100-D Area 1967 have indicated that the infiltration rates are adequate and DF`s of from 2.5 for {sup 51}Cr to 7276 for {sup 65}Zn were obtained during the 100-D test. The purpose of this report is to present the results and interpretations of data from studies conducted over a reactor coolant effluent disposal test site. Data presented in this report were collected over the 100-C Area test in which a significant percentage of the reactor coolant effluent was disposed to an existing trench for a five-month period. Results of infrared thermal surveys and ground water temperature and potential measurements collected during this test are presented.

Eliason, J.R.

1969-04-10T23:59:59.000Z

231

A static cost analysis for a higher-order language.  

E-Print Network (OSTI)

?? We develop a static complexity analysis for a higher-order functional language with structural list recursion. The complexity of an expression is a pair consisting (more)

Danner, Norman

2013-01-01T23:59:59.000Z

232

Massively Parallel Molecular Statics Simulations of the Percolation ...  

Science Conference Proceedings (OSTI)

Presentation Title, Massively Parallel Molecular Statics Simulations of the Percolation of Dislocations through a Random Array of Forest Dislocation Obstacles in...

233

Molecular Statics and Molecular Dynamics Simulations of the ...  

Science Conference Proceedings (OSTI)

Presentation Title, Molecular Statics and Molecular Dynamics Simulations of the Critical Stress for Motion of a/3 Screw Dislocations in a-Ti at Low...

234

static.nvd.nist.gov - /feeds/xml/cpe/dictionary/  

Science Conference Proceedings (OSTI)

static.nvd.nist.gov - /feeds/xml/cpe/dictionary/. [To Parent Directory] 3/1/2013 1:27 AM 17303838 official-cpe-dictionary_v2 ...

235

Static contrast enhancement layer for photolithographic processes  

DOE Patents (OSTI)

In the ever expanding microelectronic industry, there is a constant demand for improved photolithographic techniques useful in the manufacture of integrated circuits and the like. Over the years, however, the linewidths of structures patterned for microelectronic fabrication have continued to decrease. At present, 0.8 {mu}m lines and spaces are now imaged in commercial production and much smaller features are predicted for the near future. These feature sizes represent a significant drop below the previously predicted limit of optical lithography, originally thought to be around 1.25 {mu}m. These advances have been due in large part to the extensive worldwide research effort in improved optical patterning techniques. One of the more significant developments in optical patterning has been the advent of contrast enhancement layer lithography. A static stable contrast enhancement layer is provided for improving the resolution possible in photolithographic processes which comprises a photoacid generator such as an onium salt and acid-base indicator dye such as methyl yellow incorporated into a polymeric binder. The contrast enhancement layer is coated onto a conventional photoresist, and upon exposure to light in the appropriate absorption range, the salt undergoes a transformation to a strong Bronsted acid which will then bleach the indicator dye. The system is particularly designed so that an in situ contact mask is formed in a first deep UV exposure which is used to mask light projected upon the photoresist at a second wavelength. The present invention allows for exposure using deep UV sources without the need for the development of new photoresist chemistry. 1 fig.

Renschler, C.L.

1989-11-01T23:59:59.000Z

236

Static electrification in Refrigerant 113: Final report  

SciTech Connect

This report describes a one year effort to determine the fate of an Ionic additive, DCA-48, in Freon TF (C/sub 2/F/sub 3/Cl/sub 3/), used to cool the thyristors in a compressed gas-insulated converter station, under the action of a dc voltage. The additive is present to increase the conductivity of the TF and prevent static charge buildup during flow. The primary objective was to understand the time dependence of the additive loss, and then explain departures from Faraday's law, determine whether electrolysis would lead to corrosion, and determine whether conductive films would form on insulators. A combination of kinetic studies of conductivity changes, together with the application of a large number of analytical techniques has led to a model which explains most of the observations. These include the departure from Faraday's law, transient conductivity changes, conductivity recovery rate after voltage removal, and the effects of electrolysis on all of these. A key element in this model is the formation of a waxy film on the electrodes which appears to allow the intermediate species produced at the electrodes by electrolysis to reform the original additive. Of the three electrode materials studied, aluminum, stainless steel, and copper, only the latter seems to enter into the reaction and appears in solution. However, the efficiency is sufficiently low so that no major problem is expected. Any films produced on either Tefzel or glass-epoxy insulators have immeasurably low conductivity. Scaling up to laboratory results to the HVDC converter station at Astoria suggests that the transient conductivity drop due to reduction in ion concentration by the sweeping-out effect of the applied field is expected to be negligible. The depletion of additive due to electrolysis is expected to be less than 15% during the first year and to decrease in rate with time. 5 refs., 94 figs., 6 tabs.

Devins, J.C.; DeVre, M.W.

1988-12-01T23:59:59.000Z

237

A framework for the static verification of api calls  

Science Conference Proceedings (OSTI)

A number of tools can statically check program code to identify commonly encountered bug patterns. At the same time, programs are increasingly relying on external apis for performing the bulk of their work: the bug-prone program logic is being fleshed-out, ... Keywords: FindBugs, Library, Programming by contract, Static analysis, api

Diomidis Spinellis; Panagiotis Louridas

2007-07-01T23:59:59.000Z

238

Program partitioning: a framework for combining static and dynamic analysis  

Science Conference Proceedings (OSTI)

For higher quality software, static analysis and dynamic analysis should be used in a complementary manner. In this work, we explore the concept of partitioning a program such that the partitions can be analyzed separately. With such partitioning, potentially ... Keywords: dynamic analysis, program partitioning, static analysis

Pankaj Jalote; Vipindeep Vangala; Taranbir Singh; Prateek Jain

2006-05-01T23:59:59.000Z

239

Performance testing and Bayesian Reliability Analysis of small diameter, high power electric heaters for the simulation of nuclear fuel rod temperatures  

E-Print Network (OSTI)

The conversion of plutonium from a nuclear weapon to nuclear reactor fuel requires an evaluation of the residual gallium as a potential corrosive material within an operating nuclear fuel element. Homogeneous trace levels of gallium may remain following conversion and have the potential to migrate along the thermal gradient within the fuel and concentrate at the cladding-fuel contact zone. A system to investigate this material transport phenomenon was constructed using small diameter (0.18 inch), indirect electric heaters to simulate the centerline temperatures of operating nuclear fuel in a pressurized water reactor. The heater was inserted into annular surrogate fuel pellets containing depleted uranium, cerium oxide and trace quantities (10 ppm) of gallium to perform an initial study of the gallium migration using non-plutonium fuels and evaluate the performance of the simulation system. Heat was removed from the operating heaters by using an innovative liquid metal heat exchanger. The heaters were of a new design and were required to operate at a nominal temperature of 1000?C and for a minimum of 5000 hours. An evaluation of the expected heater lifetime and the thermal simulation system was needed in order to justify the high expense of a proposed full test using prototypic mixed-oxide fuel (MOX) containing plutonium from converted nuclear weapons. Bayesian reliability analysis methods were used to determine the expected heater failure rate because of the expected short test duration and the small sample size. Results from the operation of the simulation system and lifetime data indicate the current heater design is capable of producing the required temperatures and thermal gradients normally found in operating nuclear fuels. However, a design weakness in the heaters resulted in an unacceptably high failure rate of the heaters. The heaters were determined to have a reliability of 0.83 % at 5000 hours of operation with a Mean Time to Failure (MTTF) of 485 hours. The current heater design would require some modification and further testing prior to beginning a full scale test using prototypic MOX fuel pellets.

O'Kelly, David Sean

2000-01-01T23:59:59.000Z

240

R-curve and subcritical crack growth behavior at elevated temperatures in coarse grain alumina  

SciTech Connect

The effect of temperature and subcritical crack growth on the R-curve of a 99.5% purity coarse grained alumina was studied using chevron-notched, short-bar specimens. Constant loading rate tests were used to measure toughness as a function of crack length and static load tests were used to measure subcritical crack growth as a function of time. It was found that the intrinsic toughness decreased monotonically from 20 to 1200 C while the bridging contribution to the R-curve remained relatively constant over this temperature range. The constant load tests at 700, 1000 and 1200 C showed that substantial subcritical crack growth occurs under static loading. Using the subcritical crack growth parameters derived from these static load tests, the effect of loading rate on R-curve measurement was predicted and compared to experiment. The predicted decrease in the magnitude of the R-curve with a decrease in over five orders of magnitude in loading rate was relatively small compared to experimental scatter.

Webb, J.E.; Jakus, K.; Ritter, J.E. [Univ. of Massachusetts, Amherst, MA (United States). Dept. of Mechanical Engineering

1996-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "test static temperature" 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

Corrections to Bottom Pressure Records for Dynamic Temperature Response  

Science Conference Proceedings (OSTI)

Factory calibration of Digiquartz transducers allows for static temperature corrections, assuming that the temperature changes slowly enough during deployment that the gauge is always in thermal equilibrium. Deep ocean bottom pressure recorders ...

Edward F. Boss; Frank I. Gonzlez

1995-08-01T23:59:59.000Z

242

Mechanism-Based Testing Methodology for Improving the Oxidation, Hot Corrosion and Impact Resistance of High-Temperature Coatings for Advanced Gas Turbines  

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

Pittsburgh Pittsburgh University of Pittsburgh PIs: F. S. Pettit, G. H. Meier Subcontractor: J. L. Beuth SCIES Project 02- 01- SR101 DOE COOPERATIVE AGREEMENT DE-FC26-02NT41431 Tom J. George, Program Manager, DOE/NETL Richard Wenglarz, Manager of Research, SCIES Project Awarded (05/01/02, 36 Month Duration + 6 mo No-Cost Extension) $ 458,420 Total Contract Value ($ 412,695 DOE) Mechanism-Based Testing Methodology For Improving the Oxidation, Hot Corrosion and Impact Resistance of High- Temperature Coatings for Advanced Gas Turbines University of Pittsburgh - Carnegie Mellon University University of Pittsburgh University of Pittsburgh In the next generation gas turbine, resistance to thermal cycling damage may be as important as resistance to long isothermal exposures. Moreover, metallic coatings and Thermal Barrier

243

Enhanced durability of high-temperature desulfurization sorbents for moving-bed applications. Option 2 Program: Development and testing of zinc titanate sorbents  

SciTech Connect

One of the most advantageous configurations of the integrated gasification combined cycle (IGCC) power system is coupling it with a hot gas cleanup for the more efficient production of electric power in an environmentally acceptable manner. In conventional gasification cleanup systems, closely heat exchangers are necessary to cool down the fuel gases for cleaning, sometimes as low as 200--300{degree}F, and to reheat the gases prior to injection into the turbine. The result is significant losses in efficiency for the overall power cycle. High-temperature coal gas cleanup in the IGCC system can be operated near 1000{degree}F or higher, i.e., at conditions compatible with the gasifier and turbine components, resulting is a more efficient overall system. GE is developing a moving-bed, high-temperature desulfurization system for IGCC power systems in which mixed-metal oxides are currently being used as desulfurization sorbents. The objective of this contract is to identify and test fabrication methods and sorbent chemical compositions that enhance the long-term chemical reactivity and mechanical durability of zinc ferrite and other novel sorbents for moving-bed, high-temperature desulfurization of coal-derived gases. Zinc ferrite was studied under the base program of this contract. In the next phase of this program novel sorbents, particularly zinc titanate-based sorbents, are being studied under the remaining optional programs. This topical report summarizes only the work performed under the Option 2 program. In the course of carrying out the program, more than 25 zinc titanate formulations have been prepared and characterized to identify formulations exhibiting enhanced properties over the baseline zinc titanate formulation selected by the US Department of Energy.

Ayala, R.E.

1993-04-01T23:59:59.000Z

244

Preliminary Study on Utilization of Carbon Dioxide as a Coolant of High Temperature Engineering Test Reactor with MOX and Minor Actinides Fuel  

Science Conference Proceedings (OSTI)

High temperature engineering test reactor (HTTR) is an uranium oxide (UO2) fuel, graphite moderator and helium gas-cooled reactor with 30 MW in thermal output and outlet coolant temperature of 950 deg. C. Instead of using helium gas, we have utilized carbon dioxide as a coolant in the present study. Beside that, uranium and plutonium oxide (mixed oxide, MOX) and minor actinides have been employed as a new fuel type of HTTR. Utilization of plutonium and minor actinide is one of the support system to non-proliferation issue in the nuclear development. The enrichment for uranium oxide has been varied of 6-20% with plutonium and minor actinides concentration of 10%. In this study, burnup period is 1100 days. The reactor cell calculation was performed by using SRAC 2002 code, with nuclear data library was derived from JENDL3.2. Reactor core calculation was done by using CITATION module. The result shows that HTTR can achieve its criticality condition with 14% of {sup 235}U enrichment.

Fauzia, A. F.; Waris, A.; Novitrian [Bosscha Laboratory, Department of Physics, Nuclear Physics and Biophysics Research Group, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, INDONESIA Jl. Ganesa 10 Bandung 40132 (Indonesia)

2010-06-22T23:59:59.000Z

245

The young's modulus of 1018 steel and 67061-T6 aluminum measured from quasi-static to elastic precursor strain-rates  

Science Conference Proceedings (OSTI)

The assumption that Young's modulus is strain-rate invariant is tested for 6061-T6 aluminium alloy and 1018 steel over 10 decades of strain-rate. For the same billets of material, 3 quasi-static strain-rates are investigated with foil strain gauges at room temperature. The ultrasonic sound speeds are measured and used to calculate the moduli at approximately 10{sup 4} s{sup -1}. Finally, ID plate impact is used to generate an elastic pre-cursor in the alloys at a strain-rate of approximately 10{sup 6} s{sup -1} from which the longitudinal sound speed may be obtained. It is found that indeed the Young's modulus is strain-rate independent within the experimental accuracy.

Rae, Philip J [Los Alamos National Laboratory; Trujillo, Carl [Los Alamos National Laboratory; Lovato, Manuel [Los Alamos National Laboratory

2009-01-01T23:59:59.000Z

246

Moist Absolute Instability: The Sixth Static Stability State  

Science Conference Proceedings (OSTI)

It is argued that a sixth static stability state, moist absolute instability, can be created and maintained over mesoscale areas of the atmosphere. Examination of over 130 000 soundings and a numerical simulation of an observed event are employed ...

George H. Bryan; Michael J. Fritsch

2000-06-01T23:59:59.000Z

247

Secure communication of static information by electronic means  

DOE Patents (OSTI)

A method and apparatus (10) for the secure transmission of static data (16) from a tag (11) to a remote reader (12). Each time the static data (16) is to be transmitted to the reader (12), the 10 bits of static data (16) are combined with 54 bits of binary data (21), which constantly change from one transmission to the next, into a 64-bit number (22). This number is then encrypted and transmitted to the remote reader (12) where it is decrypted (26) to produce the same 64 bit number that was encrypted in the tag (11). With a continual change in the value of the 64 bit number (22) in the tag, the encrypted numbers transmitted to the reader (12) will appear to be dynamic in character rather than being static.

Gritton, Dale G. (Pleasanton, CA)

1994-01-01T23:59:59.000Z

248

Secure communication of static information by electronic means  

DOE Patents (OSTI)

This invention is comprised of a method and apparatus for the secure transmission of static data from a tag to a remote reader. Each time the static data is to be transmitted to the reader, the 10 bits of static data are combined with 54 bits of binary data, which constantly change from one transmission to the next, into a 64-bit number. This number is then encrypted and transmitted to the remote reader where it is decrypted to produce the same 64 bit number that was encrypted in the tag. With a continual change in the value of the 64 bit number in the tag, the encrypted numbers transmitted to the reader will appear to be dynamic in character rather than being static.

Gritton, D.G.

1991-12-31T23:59:59.000Z

249

Interaction mechanisms and biological effects of static magnetic fields  

Science Conference Proceedings (OSTI)

Mechanisms through which static magnetic fields interact with living systems are described and illustrated by selected experimental observations. These mechanisms include electrodynamic interactions with moving, ionic charges (blood flow and nerve impulse conduction), magnetomechanical interactions (orientation and translation of molecules structures and magnetic particles), and interactions with electronic spin states in charge transfer reactions (photo-induced electron transfer in photosynthesis). A general summary is also presented of the biological effects of static magnetic fields. There is convincing experimental evidence for magnetoreception mechanisms in several classes of lower organisms, including bacteria and marine organisms. However, in more highly evolved species of animals, there is no evidence that the interactions of static magnetic fields with flux densities up to 2 Tesla (1 Tesla [T] = 10{sup 4} Gauss) produce either behavioral or physiolocical alterations. These results, based on controlled studies with laboratory animals, are consistent with the outcome of recent epidemiological surveys on human populations exposed occupationally to static magnetic fields.

Tenforde, T.S.

1994-06-01T23:59:59.000Z

250

Securing software : an evaluation of static source code analyzers  

E-Print Network (OSTI)

This thesis evaluated five static analysis tools--Polyspace C Verifier, ARCHER, BOON, Splint, and UNO--using 14 code examples that illustrated actual buffer overflow vulnerabilities found in various versions of Sendmail, ...

Zitser, Misha, 1979-

2003-01-01T23:59:59.000Z

251

Introducing Connections Into Classes With Static Meta-Programming  

Science Conference Proceedings (OSTI)

Connections can be inserted into classes transparently. Based on an open language with a static meta-object protocol, meta-operators can be constructed that work as connectors, mixing communication code into classes. Thereby, connectors become standard ...

Uwe Amann; Andreas Ludwig

1999-04-01T23:59:59.000Z

252

Regional Variations of Moist Static Energy Flux into the Arctic  

Science Conference Proceedings (OSTI)

The authors investigate the climmological heating of the Arctic by the atmospheric moist static energy (MSE) flux from lower latitudes based on 25 years (November 19641989) of the GFDL dataset. During the five month winter period (NDJFM) the ...

James E. Overland; Philip Turet; Abraham H. Oort

1996-01-01T23:59:59.000Z

253

An Inexpensive Method for Measurements of Static Pressure Fluctuations  

Science Conference Proceedings (OSTI)

An application of a commercially available and inexpensive pressure probe and transducer, originally designed for pressure drop measurements in air conditioning conduits, is suggested for accurate and reliable measurements of static pressure ...

Dan Liberzon; Lev Shemer

2010-04-01T23:59:59.000Z

254

Tropospheric Static Stability and Central North American Growing Season Rainfall  

Science Conference Proceedings (OSTI)

This study investigates the relation between tropospheric static stability and central North American growing season (MayAugust) rainfall for the highly contrasting years of 1975. 1976, and 1979. It uses two extensive sets of meteorological data ...

Randy A. Peppler; Peter J. Lamb

1989-06-01T23:59:59.000Z

255

A microfabricated ElectroQuasiStatic induction turbine-generator  

E-Print Network (OSTI)

An ElectroQuasiStatic (EQS) induction machine has been fabricated and has generated net electric power. A maximum power output of 192 [mu]W at 235 krpm has been measured under driven excitation of the six phases. Self ...

Steyn, J. Lodewyk (Jasper Lodewyk), 1976-

2005-01-01T23:59:59.000Z

256

Hydro static water level systems at Fermilab  

Science Conference Proceedings (OSTI)

Several Hydrostatic Water Leveling systems (HLS) are in use at Fermilab. Three systems are used to monitor quadrupoles in the Tevatron and two systems are used to monitor ground motion for potential sites for the International Linear Collider (ILC). All systems use capacitive sensors to determine the water level of water in a pool. These pools are connected with tubing so that relative vertical shifts between sensors can be determined. There are low beta quadrupoles at the B0 and D0 interaction regions of Tevatron accelerator. These quadrupoles use BINP designed and built sensors and have a resolution of 1 micron. All regular lattice superconducting quadrupoles (a total of 204) in the Tevatron use a Fermilab designed system and have a resolution of 6 microns. Data on quadrupole motion due to quenches, changes in temperature will be presented. In addition data for ground motion for ILC studies caused by natural and cultural factors will be presented.

Volk, J.T.; Guerra, J.A.; Hansen, S.U.; Kiper, T.E.; Jostlein, H.; Shiltsev, V.; /Fermilab; Chupyra, A.; Kondaurov, M.; Singatulin, S.; /Novosibirsk, IYF

2006-09-01T23:59:59.000Z

257

New static spheroidal solution in Jordan-Brands-Dicke theory  

E-Print Network (OSTI)

The static spheroidal solutions of Jordan-Brands-Dicke theory (JBD) are studied. We consider the effect of the anisotropic stresses of scalar field on the shape of JBD self-graviting objects. It is shown that scalar fields can have significant effect on the structure and properties of self-graviting objects. In contrast with general relativity in JBD theory there are nonflat static spheroidal solutions.

S. M. Kozyrev

2010-12-06T23:59:59.000Z

258

Boosted static multipole particles as sources of impulsive gravitational waves  

E-Print Network (OSTI)

It is shown that the known solutions for nonexpanding impulsive gravitational waves generated by null particles of arbitrary multipole structure can be obtained by boosting the Weyl solutions describing static sources with arbitrary multipole moments, at least in a Minkowski background. We also discuss the possibility of boosting static sources in (anti-) de Sitter backgrounds, for which exact solutions are not known, to obtain the known solutions for null multipole particles in these backgrounds.

J. Podolsky; J. B. Griffiths

1998-09-01T23:59:59.000Z

259

Effects of a static electric field on nonsequential double ionization  

SciTech Connect

Using a three-dimensional semiclassical method, we perform a systematic analysis of the effects of an additional static electric field on nonsequential double ionization (NSDI) of a helium atom in an intense, linearly polarized laser field. It is found that the static electric field influences not only the ionization rate, but also the kinetic energy of the ionized electron returning to the parent ion, in such a way that, if the rate is increased, then the kinetic energy of the first returning electron is decreased, and vice versa. These two effects compete in NSDI. Since the effect of the static electric field on the ionization of the first electron plays a more crucial role in the competition, the symmetric double-peak structure of the He{sup 2+} momentum distribution parallel to the polarization of the laser field is destroyed. Furthermore, the contribution of the trajectories with multiple recollisions to the NSDI is also changed dramatically by the static electric field. As the static electric field increases, the trajectories with two recollisions, which start at the time when the laser and the static electric field are in the same direction, become increasingly important for the NSDI.

Li Hongyun [Laboratory of Optical Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080 (China); Department of Physics, State Key Laboratory for Artificial Microstructures and Mesoscopic Physics, Peking University, Beijing 100871 (China); Wang Bingbing; Li Xiaofeng; Fu Panming [Laboratory of Optical Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080 (China); Chen Jing; Liu Jie [Center for Nonlinear Studies, Institute of Applied Physics and Computational Mathematics, Beijing 100088 (China); Jiang Hongbing; Gong Qihuang [Department of Physics, State Key Laboratory for Artificial Microstructures and Mesoscopic Physics, Peking University, Beijing 100871 (China); Yan Zongchao [Department of Physics, University of New Brunswick, P.O. Box 4400, Fredericton, New Brunswick, E3B 5A3 (Canada); Research Academy of Science and Technology, Harbin Institute of Technology, Harbin 150001 (China)

2007-09-15T23:59:59.000Z

260

An Investigation of Alternative Methods for Measuring Static Pressure of Unitary Air Conditioners and Heat Pumps  

E-Print Network (OSTI)

This project was created to address an important issue currently faced by test facilities measuring static pressure for air-conditioning and heat pumps. Specifically, ASHRAE Standard 37, the industry standard for test setup, requires an outlet duct of a certain length, based on the unit outlet geometry, and this ducting added to the unit height may result in a test apparatus height that exceeds psychometric test room dimensions. This project attempted to alter the outlet duct in a way that reduces the test apparatus height while maintaining the reliability of the ASHRAE Standard 37 testing setup. The investigation was done in two scenarios, the first, which altered the direction of the flow after the unit with an elbow and measured static pressure downstream of the elbow, and the second which inserted a passive resistive piece in the flow to decrease the required distance between the unit and the static pressure measurement. Three air handling units were used in Scenario 1 and Scenario 2 testing, with the two smallest units additionally being tested in Scenario 1 with an over-sized duct. The scenario tests were required to be within 5% power and 2.5% airflow of a baseline test following ASHRAE Standard 37. he results for Scenario 1 have shown that ASHRAE Standard 37 can be modified to reduce testing height restrictions by using a square elbow with turning vanes, provided it is oriented in a specific way in relation to the blower. Furthermore, additional Scenario 1 testing on the over-sized outlet duct shows that possibilities exist for using a single over-sized duct to successfully meet ASHRAE Standard 37 testing conditions when testing a variety of units. Finally, the results of Scenario 2 have shown that the height constraints of the outlet duct can be reduced by installing a passive resistive device consisting of a mesh at the outlet; however, this approach applies only to those units with the heat exchanger located downstream of the blower. As a result of specific issues or problems that were encountered during the project that were beyond the scope, eleven case studies were presented and recommended for future work.

Wheeler, Grant Benson

2013-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "test static temperature" 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

Development of static and simulation programs for voltage stability studies of bulk power system  

SciTech Connect

In the analysis and evaluation of voltage stability, it is necessary to accurately identify the stability margin at each load point under specific system configuration or power balance condition. Voltage stability margin can be basically identified by the multi-solution load flow calculation method. When predicted by this static analysis that voltage instability may occur, time domain simulation will be required which includes the models of various control equipments related with system voltage profile. To deal with this, the following two analytical computer codes shown below were developed. (1) Voltage stability static analysis computer code employing a new load flow calculation method. (2) Time domain long term simulation computer code for voltage stability. These computer codes can also calculate the voltage stability index at each load point which is based on the margin to the stability power limit at each load point. The practicality of these codes developed were verified by applying to the IEEE-118 test system.

Nagao, T.; Tanaka, K.; Takenaka, K. [Central Research Inst. of Electric Power Industry, Tokyo (Japan)

1997-02-01T23:59:59.000Z

262

Static downhole characteristics of well CGEH-1 at Coso Hot Springs...  

Open Energy Info (EERE)

Static downhole characteristics of well CGEH-1 at Coso Hot Springs, China Lake, California Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Report: Static downhole...

263

Design, Construction, and Initial Test of High Spatial Resolution Thermometry Arrays for Detection of Surface Temperature Profiles on SRF Cavities in Super Fluid Helium  

Science Conference Proceedings (OSTI)

We designed and built two high resolution (0.6-0.55mm special resolution [1.1-1.2mm separation]) thermometry arrays prototypes out of the Allen Bradley 90-120 ohm 1/8 watt resistor to measure surface temperature profiles on SRF cavities. One array was designed to be physically flexible and conform to any location on a SRF cavity; the other was modeled after the common G-10/stycast 2850 thermometer and designed to fit on the equator of an ILC (Tesla 1.3GHz) SRF cavity. We will discuss the advantages and disadvantages of each array and their construction. In addition we will present a case study of the arrays performance on a real SRF cavity TB9NR001. TB9NR001 presented a unique opportunity to test the performance of each array as it contained a dual (4mm separation) cat eye defect which conventional methods such as OST (Oscillating Superleak second-sound Transducers) and full coverage thermometry mapping were unable to distinguish between. We will discuss the new arrays ability to distinguish between the two defects and their preheating performance.

Ari Palczewski, Rongli Geng, Grigory Eremeev

2011-07-01T23:59:59.000Z

264

Optical measurements on hydrogen at ultrahigh static pressures. Summary report for NRIP W233  

DOE Green Energy (OSTI)

The results of a two-year New Research Initiatives Program (NRIP) aimed at developing apparatus and techniques for studying hydrogen and other gases under ultrahigh static pressure in diamond--anvil cells are summarized. The following goals were achieved: A facility was established in which precision optical measurements can be made; special diamond cells for use at low temperatures were built; procedures were devised for loading cells with gases at high density; preliminary visual, x-ray, and spectral studies on various gases at pressures up to 50 kbar were conducted; and having demonstrated the feasibility of NRIP, other sponsorship on a continuing basis was obtained.

Mills, R.L.; Liebenberg, D.H.

1979-02-01T23:59:59.000Z

265

High Operating Temperature Liquid Metal Heat Transfer Fluids  

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

Liquid Metal Liquid Metal Heat Transfer Fluids UCLA, UCB, Yale DE-EE0005941 | April 15, 2013 | Ju 1.1 Thermochemistry modeling * Continue CALPHAD based calculations to search for optimal ternary alloy compositions. * Initiate development of liquid density models. 1.2 Combinatorial synthesis and characterization * Pipe-Liquid interaction of compositional library * More alloys, alloy additions and effect on liquidus temperatures * Iteratively optimize the compositions. 1.3 Corrosion characterization and mitigation * Tune static corrosion testing systems for testing over an extended period of time. * Perform analysis of the micro mechanical testing on the oxide layers. 1.4 Heat transfer characterization and modeling * Complete the construction of the flow loop and perform experiments to measure

266

Virtual Rapid Chloride Permeability Test  

Science Conference Proceedings (OSTI)

... final temperature can be manually copied to the final temperature in the test conditions box ... Type of software: Virtual testing of chloride permeability. ...

2013-06-11T23:59:59.000Z

267

Optimizing the panel area of a photovoltaic system in relation to the static inverter - practical results  

Science Conference Proceedings (OSTI)

Due to poor sizing grid-connected photovoltaic systems often underexploit the capacity of the static inverter resulting in reduced efficiency and an increase in the cost of energy. The objectives of the present project are: to show the effects of an oversized solar module area on the efficiency and profitability of a system, and to define the conditions required for oversizing. The simulations performed in a previous phase of the project showed that higher profitability was attained with the power of the photovoltaic field area sized between 40 and 80% (depending on the conditions) above the nominal power of the static inverter. The validation of these results was obtained from two sites: Herdern (near Zurich/Switzerland/lat 47.5 {degree}N/long 8.4 {degree}E/410 m above sea level) with three installations of 4.4, 3.8 and 3.4 kW S.T.C. for an inverter of nominal 3.3 kW a.c.; and Lausanne (Switzerland/lat 46.6 {degree}N/long 6.6 {degree}E/410 m above sea level) with three installations of 5.6, 4.0 and 2.4 kW S.T.C. for a static inverter of nominal 3.4 kW a.c. Detailed results are available for tests performed on both installations. The results clearly demonstrate the difference between optimal energy production and optimal energy cost. Finally, recommendations are given for optimization calculations of the photovoltaic module area and new construction directives for static inverters with a view to oversizing are issued. 5 refs., 6 figs., 8 tabs.

Keller, L. [Bureau d`Etudes Keller-Burnier, Lavigny (Switzerland); Affolter, P. [Ecole Polytechnique Federale, Lausanne (Switzerland)

1995-07-01T23:59:59.000Z

268

Reducing Parallel Program Simulation Complexity by Static Analysis  

Science Conference Proceedings (OSTI)

In this paper we present a novel approach, based on the integration of static program analysis and simulation techniques, for the performance prediction of message passing programs. PS, a simulator of PVM applications developed in the last years by our ... Keywords: parallel program analysis, performance analysis, simulation, software reengineering

Rocco Aversa; Beniamino Di Martino; Nicola Mazzocca; Umberto Villano

2000-11-01T23:59:59.000Z

269

Processor Pipelines and Their Properties for Static WCET Analysis  

E-Print Network (OSTI)

When developing real-time systems, the worst-case execution time (WCET) is a commonly used measure for predicting and analyzing program and system timing behavior. Such estimates should preferrably be provided by static WCET analysis tools. Their analysis is made difficult by features of common processors, such as pipelines and caches.

Jakob Engblom; Bengt Jonsson

2002-01-01T23:59:59.000Z

270

Fluorescent lamp with static magnetic field generating means  

DOE Patents (OSTI)

A fluorescent lamp wherein magnetic field generating means (e.g., permanent magnets) are utilized to generate a static magnetic field across the respective electrode structures of the lamp such that maximum field strength is located at the electrode's filament. An increase in efficacy during operation has been observed.

Moskowitz, Philip E. (Peabody, MA); Maya, Jakob (Brookline, MA)

1987-01-01T23:59:59.000Z

271

A static type system for JVM access control  

Science Conference Proceedings (OSTI)

This paper presents a static type system for JAVA Virtual Machine (JVM) code that enforces an access control mechanism similar to the one found, for example, in a JAVA implementation. In addition to verifying type consistency of a given JVM code, the ... Keywords: JVM, access control, stack inspection, type inference, type system

Tomoyuki Higuchi; Atsushi Ohori

2003-08-01T23:59:59.000Z

272

Closed-Form Upper Bounds in Static Cost Analysis  

Science Conference Proceedings (OSTI)

The classical approach to automatic cost analysis consists of two phases. Given a program and some measure of cost, the analysis first produces cost relations (CRs), i.e., recursive equations which capture the cost of the program in ... Keywords: Abstract interpretation, Automatic complexity analysis, Closed-form upper bounds, Cost analysis, Programming languages, Resource analysis, Static analysis

Elvira Albert; Puri Arenas; Samir Genaim; Germn Puebla

2011-02-01T23:59:59.000Z

273

Short circuit power estimation of static CMOS circuits  

Science Conference Proceedings (OSTI)

This paper presents a simple method to estimate short-circuit power dissipation for static CMOS logic circuits. Short-circuit current expression is derived by accurately interpolating peak points of actual current curves which is influenced by the gate-to-drain ...

Seung-Ho Jung; Jong-Humn Baek; Seok-Yoon Kim

2001-01-01T23:59:59.000Z

274

Fluorescent lamp with static magnetic field generating means  

DOE Patents (OSTI)

A fluorescent lamp wherein magnetic field generating means (e.g., permanent magnets) are utilized to generate a static magnetic field across the respective electrode structures of the lamp such that maximum field strength is located at the electrode's filament. An increase in efficacy during operation has been observed. 2 figs.

Moskowitz, P.E.; Maya, J.

1987-09-08T23:59:59.000Z

275

All static spherically symmetric anisotropic solutions of Einstein's equations  

Science Conference Proceedings (OSTI)

An algorithm recently presented by Lake to obtain all static spherically symmetric perfect fluid solutions is extended to the case of locally anisotropic fluids (principal stresses unequal). As expected, the new formalism requires the knowledge of two functions (instead of one) to generate all possible solutions. To illustrate the method some known cases are recovered.

Herrera, L.; Di Prisco, A. [Escuela de Fisica, Facultad de Ciencias, Universidad Central de Venezuela, Caracas (Venezuela); Ospino, J. [Area de Fisica Teorica. Facultad de Ciencias, Universidad de Salamanca, Salamanca (Spain)

2008-01-15T23:59:59.000Z

276

Static-light meson masses from twisted mass lattice QCD  

E-Print Network (OSTI)

We compute the static-light meson spectrum using two-flavor Wilson twisted mass lattice QCD. We have considered five different values for the light quark mass corresponding to 300 MeV < m_PS < 600 MeV. We have extrapolated our results, to make predictions regarding the spectrum of B and B_s mesons.

ETM Collaboration; Karl Jansen; Chris Michael; Andrea Shindler; Marc Wagner

2008-08-15T23:59:59.000Z

277

Real-time static voltage scaling on multiprocessors  

Science Conference Proceedings (OSTI)

We propose a real-time static voltage scaling (RT-SVS) technique called T-L plane transforming, which is an extension of LLREF, an optimal real-time scheduling algorithm for multiprocessor systems. We present two RT-SVS algorithms for different types ... Keywords: energy consumption, multiprocessor systems, real-time scheduling, real-time voltage scaling

Kenji Funaoka; Shinpei Kato; Nobuyuki Yamasaki

2007-11-01T23:59:59.000Z

278

Range-free mobile node localization using static anchor  

Science Conference Proceedings (OSTI)

In this paper we have proposed a deterministic, range-free, distributed localization algorithm for mobile sensor nodes with static anchors. Mobile node calculates its approximate line of movement and corresponding position based on received beacons from ... Keywords: beacon point, line of movement, mobile sensor localization, range-free

Kaushik Mondal, Partha Sarathi Mandal

2013-08-01T23:59:59.000Z

279

Communication-Sensitive Static Dataflow for Parallel Message Passing Applications  

Science Conference Proceedings (OSTI)

Message passing is a very popular style of parallel programming, used in a wide variety of applications and supported by many APIs, such as BSD sockets, MPI and PVM. Its importance has motivated significant amounts of research on optimization and debugging ... Keywords: message-passing, compiler analysis, static analysis, parallel processing, multi-core

Greg Bronevetsky

2009-03-01T23:59:59.000Z

280

Static Worksharing Strategies for Heterogeneous Computers with Unrecoverable Failures  

E-Print Network (OSTI)

Static Worksharing Strategies for Heterogeneous Computers with Unrecoverable Failures Anne Benoit1 computers that can assist in computing the workload. How can one best utilize the computers? Two features complicate this question. First, the remote computers may differ from one another in speed. Second, each

Paris-Sud XI, Université de

Note: This page contains sample records for the topic "test static temperature" 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

First test of a cryogenic scintillation module with a CaWO4 scintillator and a low-temperature photomultiplier down to 6 K  

E-Print Network (OSTI)

Future cryogenic experiments searching for rare events require reliable, efficient and robust techniques for the detection of photons at temperatures well below that to which low-temperature photomultipliers (PMT) were characterised. Motivated by this we investigated the feasibility of a low-temperature PMT for the detection of scintillation from crystalline scintillators at T = 6 K. The scintillation module was composed of a CaWO4 scintillator and a low-temperature PMT D745B from ET Enterprises. The PMT responsivity was studied at T=290, 77 and 6 K using gamma-quanta from 241Am (60 keV) and 57Co (122 and 136 keV) sources. We have shown that the low-temperature PMT retains its single photon counting ability even at cryogenic temperatures. At T = 6 K, the response of the PMT decreases to 51 +- 13 % and 27 +- 6 % when assessed in photon counting and pulse height mode, respectively. Due to the light yield increase of the CaWO4 scintillating crystal the overall responsivity of the scintillation modules CaWO4+PMT is 94 +- 15 % (photon counting) and 48 +- 8 % (pulse height) when cooling to T = 6 K. The dark count rate was found to be 20 s-1. The energy resolution of the module remains similar to that measured at room temperature using either detection mode. It is concluded that commercially available low-temperature PMT are well suited for detection of scintillation light at cryogenic temperatures.

H. Kraus; V. B. Mikhailik

2010-02-02T23:59:59.000Z

282

Static downhole characteristics of well CGEH-1 at Coso Hot Springs, China  

Open Energy Info (EERE)

downhole characteristics of well CGEH-1 at Coso Hot Springs, China downhole characteristics of well CGEH-1 at Coso Hot Springs, China Lake, California Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Report: Static downhole characteristics of well CGEH-1 at Coso Hot Springs, China Lake, California Details Activities (5) Areas (1) Regions (0) Abstract: A series of measurements was made in the exploratory well CGEH-1 at Coso Hot Springs. The temperature measurements provide estimates for the thermal equilibration of the well and indicate that the fractures intersecting the well have different temperatures. The hottest fractures are in the upper-cased portion of the well. Downhole chemical sampling suggests that the borehole still contains remnants of drilling materials. The well has never been extensively flowed at this time.

283

Variability of Temperature in Wisconsin  

Science Conference Proceedings (OSTI)

Daily maximum and minimum temperatures since 1897 at three stations in Wisconsin are examined, and the hypothesis is tested that there is no association between interdiurnal or interannual temperature and either the local mean temperature or an ...

W. A. R. Brinkmann

1983-01-01T23:59:59.000Z

284

Low Temperature Static and Dynamic Behavior of the Two-Dimensional Easy Axis Heisenberg Model  

E-Print Network (OSTI)

´isica, ICEx, Universidade Federal de Minas Gerais Belo Horizonte, CP 702, CEP 30123-970, MG, Brazil (August 10, are compared to numerical simulation data combining cluster-Monte Carlo algorithms and Spin Dynamics

Wysin, Gary

285

FAST STATIC AND DYNAMIC GRID LEVEL THERMAL SIMULATION CONSIDERING TEMPERATURE DEPENDENT THERMAL CONDUCTIVITY OF SILICON  

E-Print Network (OSTI)

heat diffusion equation has been conventionally handled by grid-grids and an approximate delta function simulating a point heatgrid size of 6464. To obtain transient thermal mask an impulse heat

Ziabari, Amirkoushyar

2012-01-01T23:59:59.000Z

286

Development and Testing of Canada-Wide Interpolated Spatial Models of Daily MinimumMaximum Temperature and Precipitation for 19612003  

Science Conference Proceedings (OSTI)

The application of trivariate thin-plate smoothing splines to the interpolation of daily weather data is investigated. The method was used to develop spatial models of daily minimum and maximum temperature and daily precipitation for all of ...

Michael F. Hutchinson; Dan W. McKenney; Kevin Lawrence; John H. Pedlar; Ron F. Hopkinson; Ewa Milewska; Pia Papadopol

2009-04-01T23:59:59.000Z

287

Testing and performance evaluation of T1000G/RS-14 graphite/polycyanate composite materials  

Science Conference Proceedings (OSTI)

The performance of a graphite fiber/polycyanate matrix composite material system, T1000G/RS-14, was evaluated by performing an extensive mechanical property test program. The test program included both static strength and long-term tests for creep, fatigue, and stress rupture. The system was evaluated at both ambient temperature and elevated temperatures. The specimens were machined from composite cylinders that had a unidirectional layup with all the fibers oriented in the hoop direction. The cylinders were fabricated using the wet-filament winding process. In general, the T1000G/RS-14 system demonstrated adequate static strengths for possible aerospace structural applications. The results from the static tests indicated that very high composite hoop tensile strengths can be achieved with this system at both ambient and elevated temperatures as high as 350{degree}F. However, in the long-term testing for compressive creep and tension-tension fatigue the results indicated a lower elevated temperature was required to minimize the risk of using this material system. Additional testing and analysis activities led to the selection of 275{degree}F as the desired temperature for future performance evaluation. Subsequent testing efforts for determining the resin and composite transverse compressive creep responses at 275{degrees}F indicated that excessive creep strain rates may still be a weakness of this system. In the long-term tests, sufficient data was generated from impregnated strand and composite ring stress-life testing, and composite ring tension-tension fatigue to determine failure probabilities for a given set of design requirements. The statistical analyses of the test data, in terms of determining failure probability curves, will be reported on in a separate report. However, it is expected that this material system will have a very low failure probability for stress rupture based on the collected stress-life data. Material responses that will require further investigation and/or possible performance improvements are fiber- direction tension-tension fatigue, and both resin and transverse composite compressive creep. Improvements in the creep performance or dimensional stability of this material system may ultimately depend on the test and/or process environment.

Starbuck, J.M.

1997-01-01T23:59:59.000Z

288

Frostbite Theater - Static Electricity Experiments - How to Make Your Own  

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

How Does a Van de Graaff Generator Work? How Does a Van de Graaff Generator Work? Previous Video (How Does a Van de Graaff Generator Work?) Frostbite Theater Main Index Next Video (Should a Person Touch 200,000 Volts?) Should a Person Touch 200,000 Volts? How to Make Your Own Electroscope! An electroscope is a simple device that you can use to do static electricity experiments. They are easy to make. Would you like to know how to build your own? We'll show you how! [ Show Transcript ] Announcer: Frostbite Theater presents... Cold Cuts! No baloney! Joanna and Steve: Just science! Joanna: Hi! I'm Joanna! Steve: And I'm Steve! Joanna: An electroscope is a simple device that you can use to do static electricity experiments. Today, Steve and I are going to show you how to make one! Steve: The electroscope is fairly simple. Ours is just made from a binder

289

Segmenting Simply Connected Moving Objects in a Static Scene  

E-Print Network (OSTI)

A new segmentation algorithm is derived, based on an object-background probability estimate exploiting the experimental fact that the statistics of local image derivatives show a Laplacian distribution. The objects' simply connectedness is included directly into the probability estimate and leads to an iterative optimization approach that can be implemented efficiently. This new approach avoids early thresholding, explicit edge detection, motion analysis, and grouping. Contribution type: Correspondence 1 This work was supported by the consortium VISAGE and KWF grant No. 2440.1 1 Introduction In many object recognition applications the objects of interest are moving whereas the background is static or can be stabilized [1, 2]. Motion segmentation can enormously simplify, subsequent object recognition steps. Therefore, detecting and segmenting moving objects in a static scene is an important computer vision task. In recent years a number of different approaches have been proposed for...

Martin Bichsel

1994-01-01T23:59:59.000Z

290

Eigenmodes of quasi-static magnetic islands in current sheet  

Science Conference Proceedings (OSTI)

As observation have shown, magnetic islands often appear before and/or after the onset of magnetic reconnections in the current sheets, and they also appear in the current sheets in the solar corona, Earth's magnetotail, and Earth's magnetopause. Thus, the existence of magnetic islands can affect the initial conditions in magnetic reconnection. In this paper, we propose a model of quasi-static magnetic island eigenmodes in the current sheet. This model analytically describes the magnetic field structures in the quasi-static case, which will provide a possible approach to reconstructing the magnetic structures in the current sheet via observation data. This model is self-consistent in the kinetic theory. Also, the distribution function of charged particles in the magnetic island can be calculated.

Li Yi; Cai Xiaohui; Chai Lihui; Wang Shui [CAS Key Laboratory of Basic Plasma Physics, School of Earth and Space Sciences, University of Science and Technology of China, Hefei, Anhui 230026 (China); Zheng Huinan [CAS Key Laboratory of Basic Plasma Physics, School of Earth and Space Sciences, University of Science and Technology of China, Hefei, Anhui 230026 (China); Mengcheng National Geophysical Observatory, School of Earth and Space Sciences, University of Science and Technology of China Hefei (China); Shen Chao [State Key Laboratory of Space Weather, Center for Space Science and Applied Research, Chinese Academy of Sciences, Beijing 100080 (China)

2011-12-15T23:59:59.000Z

291

Static Semantic Analysis and Theorem Proving for CASL  

E-Print Network (OSTI)

. This paper presents a static semantic analysis for CASL, the Common Algebraic Specification Language. Abstract syntax trees are generated including subsorts and overloaded functions and predicates. The static semantic analysis, through the implementation of an overload resolution algorithm, checks and qualifies these abstract syntax trees. The result is a fully qualified CASL abstract syntax tree where the overloading has been resolved. This abstract syntax tree corresponds to a theory in the institution underlying CASL, subsorted partial first-order logic with sort generation constraints (SubPCFOL). Two ways of embedding SubPCFOL in higher-order logic (HOL) of the logical framework Isabelle are discussed: the first one from SubPFOL to HOL via PFOL (partial first-order logic) first drops subsorting and then partiality, and the second one is the counterpart via SubFOL (subsorted first-order logic). The C in SubPCFOL stands for sort generation constraints, which are translated separat...

Till Mossakowski; Kolyang; Bernd Krieg-Brckner

1998-01-01T23:59:59.000Z

292

Dirty black holes: Symmetries at stationary non-static horizons  

E-Print Network (OSTI)

We establish that the Einstein tensor takes on a highly symmetric form near the Killing horizon of any stationary but non-static (and non-extremal) black hole spacetime. [This follows up on a recent article by the current authors, gr-qc/0402069, which considered static black holes.] Specifically, at any such Killing horizon -- irrespective of the horizon geometry -- the Einstein tensor block-diagonalizes into ``transverse'' and ``parallel'' blocks, and its transverse components are proportional to the transverse metric. Our findings are supported by two independent procedures; one based on the regularity of the on-horizon geometry and another that directly utilizes the elegant nature of a bifurcate Killing horizon. It is then argued that geometrical symmetries will severely constrain the matter near any Killing horizon. We also speculate on how this may be relevant to certain calculations of the black hole entropy.

A J M Medved; Damien Martin; Matt Visser

2004-03-05T23:59:59.000Z

293

Design, Fabrication, and Test of a 5-kWh/100-kW Flywheel Energy Storage Utilizing a High-Temperature Superconducting Bearing  

DOE Green Energy (OSTI)

The summaries of this project are: (1) Program goal is to design, develop, and demonstrate a 100 kW UPS flywheel electricity system; (2) flywheel system spin tested up to 15,000 RPM in a sensorless, closed loop mode; (3) testing identified a manufacturing deficiency in the motor stator--overheats at high speed, limiting maximum power capability; (4) successfully spin tested direct cooled HTS bearing up to 14,500 RPM (limited by Eddy current clutch set-up); (5) Testing confirmed commercial feasibility of this bearing design--Eddy Current losses are within acceptable limits; and (6) Boeing's investment in flywheel test facilities increased the spin-test capabilities to one of the highest in the nation.

Dr. Michael Strasik, Philip E Johnson; A. C. Day; J. Mittleider; M. D. Higgins; J. Edwards; J. R. Schindler; K. E. McCrary; C.R. McIver; D.; J. F. Gonder; J. R. Hull

2007-10-29T23:59:59.000Z

294

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

E-Print Network (OSTI)

This study was conducted to determine the effects of compression on pressure drops in non-metallic flexible duct. Duct sizes of 12, 14 and 16 diameters were tested at a five different compression ratios (maximum stretch, 4%, 15%, 30% and 45%) following the draw through methodology in ASHRAE Standard 120 -1999 Methods of Testing to Determine Flow Resistance of Air Ducts and Fittings. With the pressure drop data gathered, equations were developed to approximate the pressure loss at a given air flow rate for a given duct size. The data gathered showed general agreement with previous studies showing an increase in compression ratio leads to an increase in static pressure loss through the duct. It was determined that pressure losses for compression ratios greater than 4% were over four times greater than maximum stretched flexible duct of corresponding duct size. The increased static pressure losses can lead to decreased performance in HVAC systems. The findings of this study add to the existing ASHRAE and industry data for flexible duct with varying compression ratios.

Cantrill, David Lee

2013-08-01T23:59:59.000Z

295

Static Equilibrium: Forecasting Long-Term Energy Prices  

Science Conference Proceedings (OSTI)

This report describes a static equilibrium model that can be used by power companies to analyze retirement and investment decisions. Given deterministic expectations of prices, technology alternatives, and growth rates, the model defines a long-term equilibrium for an electricity market that can be used as a practical starting point for analyzing dynamic equilibrium, the distribution of outcomes associated with investment and retirement in a probabilistic world. The report includes a spreadsheet that ca...

2005-09-21T23:59:59.000Z

296

Dust Static Spherically Symmetric Solution in $f(R)$ Gravity  

E-Print Network (OSTI)

In this paper, we take dust matter and investigate static spherically symmetric solution of the field equations in metric f(R) gravity. The solution is found with constant Ricci scalar curvature and its energy distribution is evaluated by using Landau-Lifshitz energy-momentum complex. We also discuss the stability condition and constant scalar curvature condition for some specific popular choices of f(R) models in addition to their energy distribution.

Muhammad Sharif; Hafiza Rizwana Kausar

2011-02-21T23:59:59.000Z

297

Static-light mesons on a dynamical anisotropic lattice  

E-Print Network (OSTI)

We present results for the spectrum of static-light mesons from Nf=2 lattice QCD. These results were obtained using all-to-all light quark propagators on an anisotropic lattice, yielding an improved signal resolution when compared to more conventional lattice techniques. In particular, we consider the inversion of orbitally-excited multiplets with respect to the `standard ordering', which has been predicted by some quark models.

Justin Foley; Alan O Cais; Mike Peardon; Sinead M Ryan

2006-10-09T23:59:59.000Z

298

General Solutions to Static Plane Symmetric Einstein's Equations  

E-Print Network (OSTI)

A general formula for the metric as an explicit function of the generic energy-momentum tensor is given which satisfies static plane symmetric Einstein's equations with cosmological constant.In order to illustrate it, the solutions for the vacuum with cosmological constant, the perfect fluid with a linear equation of state and the electrically charged plane are derived and compared with known results. The general solution with a linear relation among the energy-momentum tensor components is also obtained.

Leandro G. Gomes

2013-08-23T23:59:59.000Z

299

Distributed measurement of conductor temperatures in mine trailing cables using fiber-optic technology  

Science Conference Proceedings (OSTI)

Mine trailing cables operated above safe thermal limits can cause premature insulation failure, increasing electrocution and fire hazards. Previous US Bureau of Mines Pittsburgh Research Center research showed that, under static test conditions, electrical current levels permitted under present regulations may not limit cable temperatures to less than the 90 C rating of reeled trailing cable. Continuing research under the National Institute for Occupational Safety and Health (NIOSH) addresses thermal characteristics of reeled trailing cable under dynamic test conditions more representative of field conditions, where operators constantly reel in and pay out cable. This research is in support of efforts by industry associations and the Mine Safety and Health Administration to establish safety guidelines for cyclically rated reeled machines. This paper describes a unique approach to measuring temperatures within reeled cable under dynamic test conditions. Fiber-optic sensors embedded within the metallic conductors measure temperatures at 1-m intervals along the entire length of cable. Temperature measurements are reported to be accurate to within {+-}1 C. The test setup requires access to only one end of the trailing cable, allowing researchers to freely reel in and pay out cable while temperature measurements are made, simulating field conditions. Manufacture of a fiber-optic-embedded trailing cable is described, along with initial test results that indicate the fiber-optic approach is viable.

Dubaniewicz, T.H. Jr.; Kovalchik, P.G.; Scott, L.W. [National Inst. for Occupational Safety and Health, Pittsburgh, PA (United States). Research Lab.] [National Inst. for Occupational Safety and Health, Pittsburgh, PA (United States). Research Lab.; Fuller, M.A. [AmerCable, Sewickley, PA (United States)] [AmerCable, Sewickley, PA (United States)

1998-03-01T23:59:59.000Z

300

Matter Collineations of Static Spacetimes with Maximal Symmetric Transverse Spaces  

E-Print Network (OSTI)

This paper is devoted to study the symmetries of the energy-momentum tensor for the static spacetimes with maximal symmetric transverse spaces. We solve matter collineation equations for the four main cases by taking one, two, three and four non-zero components of the vector $\\xi^a$. For one component non-zero, we obtain only one matter collineation for the non-degenerate case and for two components non-zero, the non-degenerate case yields maximum three matter collineations. When we take three components non-zero, we obtain three, four and five independent matter collineations for the non-degenerate and for the degenerate cases respectively. This case generalizes the degenerate case of the static spherically symmetric spacetimes. The last case (when all the four components are non-zero) provides the generalization of the non-degenerate case of the static spherically symmetric spacetimes. This gives either four, five, six, seven or ten independent matter collineations in which four are the usual Killing vectors and rest are the proper matter collineations. It is mentioned here that we obtain different constraint equations which, on solving, may provide some new exact solutions of the Einstein field equations.

M. Sharif

2007-02-10T23:59:59.000Z

Note: This page contains sample records for the topic "test static temperature" 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

On the Linkage between Antarctic Surface Water Stratification and Global Deep-Water Temperature  

Science Conference Proceedings (OSTI)

The suggestion is advanced that the remarkably low static stability of Antarctic surface waters may arise from a feedback loop involving global deep-water temperatures. If deep-water temperatures are too warm, this promotes Antarctic convection, ...

Ralph F. Keeling; Martin Visbeck

2011-07-01T23:59:59.000Z

302

Leach test methodology for the Waste/Rock Interactions Technology Program  

Science Conference Proceedings (OSTI)

Experimental leach studies in the WRIT Program have two primary functions. The first is to determine radionuclide release from waste forms in laboratory environments which attempt to simulate repository conditions. The second is to elucidate leach mechanisms which can ultimately be incorporated into nearfield transport models. The tests have been utilized to generate rates of removal of elements from various waste forms and to provide specimens for surface analysis. Correlation between constituents released to the solution and corresponding solid state profiles is invaluable in the development of a leach mechanism. Several tests methods are employed in our studies which simulate various proposed leach incident scenarios. Static tests include low temperature (below 100/sup 0/C) and high temperature (above 100/sup 0/C) hydrothermal tests. These tests reproduce nonflow or low-flow repository conditions and can be used to compare materials and leach solution effects. The dynamic tests include single-pass, continuous-flow(SPCF) and solution-change (IAA)-type tests in which the leach solutions are changed at specific time intervals. These tests simulate repository conditions of higher flow rates and can also be used to compare materials and leach solution effects under dynamic conditions. The modified IAEA test is somewhat simpler to use than the one-pass flow and gives adequate results for comparative purposes. The static leach test models the condition of near-zero flow in a repository and provides information on element readsorption and solubility limits. The SPCF test is used to study the effects of flowing solutions at velocities that may be anticipated for geologic groundwaters within breached repositories. These two testing methods, coupled with the use of autoclaves, constitute the current thrust of WRIT leach testing.

Bradley, D.J.; McVay, G.L.; Coles, D.G.

1980-05-01T23:59:59.000Z

303

Theory, electro-optical design, testing, and calibration of a prototype atmospheric supersaturation, humidity, and temperature sensor. Final report Mar 81-Jul 82  

SciTech Connect

A new infrared differential absorption - passive thermal emission based instrument designed to make accurate in-cloud measurements of absolute humidity, air temperature, relative humidity, and ice and water supersaturations has been developed. Absolute humidity is measured by the differential infrared absorption of a broad-band light beam between 2.45 microns wavelength and the strongly absorbing water vapor band at 2.67 microns. Air temperature is sensed by a passive radiometric measurement of the Planck's law radiance emitted by carbon dioxide molecules in their very intense emission band at 4.25 microns. Significant operational advantages over previous 14-16 micron band radiometers are achieved. These non-contact optical measurements of absolute humidity and true air temperature can then be combined to yield relative humidity values with respect to both water and ice which remain valid in condensing supersaturated conditions and in spite of hydrometeors in the sample volume.

Nelson, L.D.

1982-07-15T23:59:59.000Z

304

Beowawe geothermal-resource assessment. Final report. Shallow-hole temperature survey geophysics and deep test hole Collins 76-17  

DOE Green Energy (OSTI)

Geothermal resource investigation field efforts in the Beowawe Geysers Area, Eureka County, Nevada are described. The objectives included acquisition of geotechnical data for understanding the nature and extent of the geothermal resource boundaries south of the known resource area. Fourteen shallow (<500 feet) temperature-gradient holes plus geophysics were used to select the site for a deep exploratory well, the Collins 76-17, which was completed to a total depth of 9005 feet. Maximum downhole recorded temperature was 311/sup 0/F, but no flow could be induced.

Jones, N.O.

1983-03-01T23:59:59.000Z

305

Test Automation Test Automation  

E-Print Network (OSTI)

Test Automation Test Automation Mohammad Mousavi Eindhoven University of Technology, The Netherlands Software Testing 2013 Mousavi: Test Automation #12;Test Automation Outline Test Automation Mousavi: Test Automation #12;Test Automation Why? Challenges of Manual Testing Test-case design: Choosing inputs

Mousavi, Mohammad

306

Program predicts reservoir temperature and geothermal gradient  

Science Conference Proceedings (OSTI)

This paper reports that a Fortran computer program has been developed to determine static formation temperatures (SFT) and geothermal gradient (GG). A minimum of input data (only two shut-in temperature logs) is required to obtain the values of SFT and GG. Modeling of primary oil production and designing enhanced oil recovery (EOR) projects requires knowing the undisturbed (static) reservoir temperature. Furthermore, the bottom hole circulating temperature (BHCT) is an important factor affecting a cement's thickening time, rheological properties, compressive strength, development, and set time. To estimate the values of BHCT, the geothermal gradient should be determined with accuracy. Recently we obtained an approximate analytical solution which describes the shut-in temperature behavior.

Kutasov, I.M.

1992-06-01T23:59:59.000Z

307

All the four dimensional static, spherically symmetric solutions of abelian Kaluza-Klein theory  

E-Print Network (OSTI)

The explicit form for all the four dimensional, static, spherically symmetric solutions in (4+n)-d Abelian Kaluza-Klein (KK) theory is presented by performing two SO(1,1) boosts on the non-extreme U(1)_M \\times U(1)_E KK black hole (BH) and supplementing it by SO(n)/SO(n-2) transformations. The solutions are parameterized by the mass M, Taub-Nut charge a, n electric \\vec{\\cal Q} and n magnetic \\vec{\\cal P} charges. Non-extreme BH's (with zero Taub-NUT charge) have either the Reissner-Nordstr\\" om or Schwarzschild global space-time, nonzero entropy and temperature. Extreme (supersymmetric) BH's satisfy \\vec{\\cal P} \\cdot \\vec{\\cal Q} = 0 and have a null or naked singularity, with S [T_H] reaching the zero lower [finite or infinite upper] bound.

Cvetic, M; Cveti, Mirjam; Youm, Donam

1995-01-01T23:59:59.000Z

308

Variable energy flux in quasi-static magnetohydrodynamic turbulence  

E-Print Network (OSTI)

Experiments and numerical simulations show that the energy spectrum of the magnetohydrodynamic turbulence in the quasi-static limit deviates from Kolmogorov's $k^{-5/3}$ spectrum as the external magnetic field, or equivalently the interaction parameter, is increased. To explain this phenomena, we construct an analytical turbulence model with variable energy flux that arises due to the Lorentz-force induced dissipation. The energy spectra computed using our model for various interaction parameters are in qualitative agreement with earlier experimental and numerical results.

Mahendra K. Verma

2013-04-25T23:59:59.000Z

309

Static fluid cylinders and their fields: global solutions  

E-Print Network (OSTI)

The global properties of static perfect-fluid cylinders and their external Levi-Civita fields are studied both analytically and numerically. The existence and uniqueness of global solutions is demonstrated for a fairly general equation of state of the fluid. In the case of a fluid admitting a non-vanishing density for zero pressure, it is shown that the cylinder's radius has to be finite. For incompressible fluid, the field equations are solved analytically for nearly Newtonian cylinders and numerically in fully relativistic situations. Various physical quantities such as proper and circumferential radii, external conicity parameter and masses per unit proper/coordinate length are exhibited graphically.

J. Bicak; T. Ledvinka; B. G. Schmidt; M. Zofka

2004-03-02T23:59:59.000Z

310

Static Length Scales of N=6 Chern-Simons Plasma  

E-Print Network (OSTI)

Using gravity description, we compute various static length scales of N=6 Chern Simons plasma in a strongly coupled regime. For this, we consider the CP3 compactification of the type IIA supergravity down to four dimensions, and identify all the low-lying bosonic modes up to masses corresponding to the operator dimension 3 together with all the remaining CP3 invariant modes. We find the true mass gap, the Debye screening mass and the corresponding dual operators to be probed in the field theory side.

Dongsu Bak; Kazem Bitaghsir Fadafan; Hyunsoo Min

2010-03-26T23:59:59.000Z

311

Coordinate Conditions for a Uniformly Accelerated or Static Plane Symmetric  

E-Print Network (OSTI)

The coordinate conditions for three exact solutions for the metric components of a coordinate system with constant acceleration or of a static plane symmetric gravitational field are presented. First, the coordinate condition that the acceleration of light is constant is applied to the field equations to derive the metric of a coordinate system of constant acceleration. Second, the coordinate conditions required to produce the metrics of Rindler and Lass are applied to the field equations to calculate the components of these two metrics and the coordinate velocities and coordinate accelerations for light of these two metrics are compared to the coordinate system of constant acceleration. 1 I.

unknown authors

2004-01-01T23:59:59.000Z

312

Quantum field theory in static external potentials and Hadamard states  

E-Print Network (OSTI)

We prove that the ground state for the Dirac equation on Minkowski space in static, smooth external potentials satisfies the Hadamard condition. We show that it follows from a condition on the support of the Fourier transform of the corresponding positive frequency solution. Using a Krein space formalism, we establish an analogous result in the Klein-Gordon case for a wide class of smooth potentials. Finally, we investigate overcritical potentials, i.e. which admit no ground states. It turns out, that numerous Hadamard states can be constructed by mimicking the construction of ground states, but this leads to a naturally distinguished one only under more restrictive assumptions on the potentials.

Micha? Wrochna

2011-08-15T23:59:59.000Z

313

Developing and Simulation Research of the Control Model and Control Strategy of Static Frequency Converter  

Science Conference Proceedings (OSTI)

a control model and control strategy of static frequency converter (SFC) for pumped storage power plant unit is presented. Control strategy of static start-up and its mathematical model is discussed in detail. And based on the 42 poles of synchronous ... Keywords: Pumped Storage Power Plant, Static Frequency Converter, SFC, Commutation, Control

Deshun Wang; Lichun Zhang; Bo Yang; Guanjun Li; Yibin Tao; Jianzhong Fu; Jianfeng Li; Liantao Ji

2012-01-01T23:59:59.000Z

314

Human gait recognition by the fusion of motion and static spatio-temporal templates  

Science Conference Proceedings (OSTI)

In this paper, we propose a gait recognition algorithm that fuses motion and static spatio-temporal templates of sequences of silhouette images, the motion silhouette contour templates (MSCTs) and static silhouette templates (SSTs). MSCTs and SSTs capture ... Keywords: Biometrics, Gait recognition, Motion silhouette contour templates, Static silhouette templates

Toby H. W. Lam; Raymond S. T. Lee; David Zhang

2007-09-01T23:59:59.000Z

315

Static, cylindrical symmetry in general relativity and vacuum energy  

E-Print Network (OSTI)

In the first section of my research, in analogy with the standard derivation of the spherically symmetric Schwarzschild solution of the Einstein field equations, I find all static, cylindrically symmetric solutions of the Einstein equations for vacuum. These include not only the well known cone solution, which is locally flat, but others in which the metric coefficients are powers of the radial coordinate and the space-time is curved. These solutions appear in the literature, but in different forms, corresponding to different definitions of the radial coordinate. I find expressions for transforming between these different metric forms and examine some special points of interest. I then examine some special cases of non-vacuum solutions of the equations as well. Because all the vacuum solutions are singular on the axis, I match them to interior solutions with nonvanishing energy density and pressure. In addition to the well known cosmic string solution joining on to the cone, we find some numerical solutions that join on to the other exterior solutions. I then consider only a static, flat, cylindrically symmetric space-time. I calculate the components of the stress-energy tensor in terms of the cylinder kernel and its derivatives. The cylinder kernel in cylindrical coordinates has been previously calculated and can be used to find the energy density and pressure on various cylindrical boundaries; future work will include finding these quantities for various cylindrically symmetric geometries.

Trendafilova, Cynthia

2011-05-01T23:59:59.000Z

316

Core Hole Drilling And Testing At The Lake City, California Geothermal  

Open Energy Info (EERE)

Hole Drilling And Testing At The Lake City, California Geothermal Hole Drilling And Testing At The Lake City, California Geothermal Field Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Paper: Core Hole Drilling And Testing At The Lake City, California Geothermal Field Details Activities (4) Areas (1) Regions (0) Abstract: Unavailable Author(s): Dick Benoit, Joe Moore, Colin Goranson, David Blackwell Published: GRC, 2005 Document Number: Unavailable DOI: Unavailable Core Analysis At Lake City Hot Springs Area (Benoit Et Al., 2005) Core Holes At Lake City Hot Springs Area (Benoit Et Al., 2005) Flow Test At Lake City Hot Springs Area (Benoit Et Al., 2005) Static Temperature Survey At Lake City Hot Springs Area (Benoit Et Al., 2005) Lake City Hot Springs Geothermal Area Retrieved from "http://en.openei.org/w/index.php?title=Core_Hole_Drilling_And_Testing_At_The_Lake_City,_California_Geothermal_Field&oldid=389996

317

H1: Polypropylene Tensile Test under Quasi-Static and Dynamic ...  

Science Conference Proceedings (OSTI)

C19: Dissolution Behavior of Cu Under Bump Metallization in Ball Grid Array Structure .... H2: Triboluminescent Smart Sensors for Structural Health Monitoring .

318

Static pushover analyses of pile groups in liquefied and laterally spreading ground in centrifuge tests  

E-Print Network (OSTI)

AND GEOENVIRONMENTAL ENGINEERING ASCE / SEPTEMBER 2007Special Publication No. 145, ASCE, Reston, Va. Brandenberg,Special Publication No. 145, ASCE, Reston, Va. , 204217.

Brandenberg, Scott J; Boulanger, R W; Kutter, Bruce L; Chang, Dongdong

2007-01-01T23:59:59.000Z

319

High-Temperature Co-electrolysis of Steam and Carbon Dioxide for Direct Production of Syngas; Equilibrium Model and Single-Cell Tests  

DOE Green Energy (OSTI)

An experimental study has been completed to assess the performance of single solid-oxide electrolysis cells operating over a temperature range of 800 to 850C in the coelectrolysis mode, simultaneously electrolyzing steam and carbon dioxide for the direct production of syngas. The experiments were performed over a range of inlet flow rates of steam, carbon dioxide, hydrogen and nitrogen and over a range of current densities (-0.1 to 0.25 A/cm2) using single electrolyte-supported button electrolysis cells. Steam and carbon dioxide consumption rates associated with electrolysis were measured directly using inlet and outlet dewpoint instrumentation and a gas chromatograph, respectively. Cell operating potentials and cell current were varied using a programmable power supply. Measured values of open-cell potential and outlet gas composition are compared to predictions obtained from a chemical equilibrium coelectrolysis model. Model predictions of outlet gas composition based on an effective equilibrium temperature are shown to agree well with measurements. Cell area-specific resistance values were similar for steam electrolysis and coelectrolysis.

O'Brien, J. E.; Stoots, C. M.; Herring, J. S.; Hartvigsen, J. J.

2007-07-01T23:59:59.000Z

320

High-Temperature Co-electrolysis of Carbon Dioxide and Steam for the Production of Syngas; Equilibrium Model and Single-Cell Tests  

DOE Green Energy (OSTI)

An experimental study has been completed to assess the performance of single solid-oxide electrolysis cells operating over a temperature range of 800 to 850C in the coelectrolysis mode, simultaneously electrolyzing steam and carbon dioxide for the direct production of syngas. The experiments were performed over a range of inlet flow rates of steam, carbon dioxide, hydrogen and nitrogen and over a range of current densities (-0.1 to 0.25 A/cm2) using single electrolyte-supported button electrolysis cells. Steam and carbon dioxide consumption rates associated with electrolysis were measured directly using inlet and outlet dewpoint instrumentation and a gas chromatograph, respectively. Cell operating potentials and cell current were varied using a programmable power supply. Measured values of open-cell potential and outlet gas composition are compared to predictions obtained from a chemical equilibrium coelectrolysis model. Model predictions of outlet gas composition based on an effective equilibrium temperature are shown to agree well with measurements. Area-specific resistance values were similar for steam electrolysis and coelectrolysis.

J. E. O'Brien; C. M. Stoots; G. L. Hawkes; J. S. Herring; J. J. Hartvigsen

2007-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "test static temperature" 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

Large-Strain Time-Temperature Equivalence and Adiabatic Heating of Polyethylene  

Science Conference Proceedings (OSTI)

Time-temperature equivalence is a well-known phenomenon in time-dependent material response, where rapid events at a moderate temperature are indistinguishable from some occurring at modest rates but elevated temperatures. However, there is as-yet little elucidation of how well this equivalence holds for substantial plastic strains. In this work, we demonstrate time-temperature equivalence over a large range in a previously studied high-density polyethylene formulation (HDPE). At strain-rates exceeding 0.1/s, adiabatic heating confounds the comparison of nominally isothermal material response, apparently violating time-temperature equivalence. Strain-rate jumps can be employed to access the instantaneous true strain rate without heating. Adiabatic heating effects were isolated by comparing a locus of isothermal instantaneous flow stress measurements from strain-rate jumps up to 1/s with the predicted equivalent states at 0.01/s and 0.001/s in compression. Excellent agreement between the isothermal jump condition locus and the quasi-static tests was observed up to 50% strain, yielding one effective isothermal plastic response for each material for a given time-temperature equivalent state. These results imply that time-temperature equivalence can be effectively used to predict the deformation response of polymers during extreme mechanical events (large strain and high strain-rate) from measurements taken at reduced temperatures and nominal strain-rates in the laboratory.

Furmanski, Jevan [Los Alamos National Laboratory; Brown, Eric [Los Alamos National Laboratory; Cady, Carl M. [Los Alamos National Laboratory

2012-06-06T23:59:59.000Z

322

Static and dynamic dipole polarizability of cylindrically confined hydrogen atom  

E-Print Network (OSTI)

The non-relativistic static and dynamic dipole polarizabilities of hydrogen atom experiencing a cylindrical confinement are investigated. Two methods based on B-Splines are used for the computations of the energies and wavefunctions. The first method is a variational based method while the second one proceeds by a fit of the non-separable Coulomb potential in the product form. The computed energies compare very well with previous computations. They converge, as well as the dipole polarizability, to the exact unconfined free atom values. The fit approach is found to be advantageous, as it helps saving the computational time without a loss of accuracy. Dynamic polarizabilities have been reported for various dimensions of the confining cylinder.

Ndengu, S A; Melono, R L Melingui; Etindele, A J

2013-01-01T23:59:59.000Z

323

Static Heat Loads in the LHC Arc Cryostats: Final Assessment  

E-Print Network (OSTI)

This note presents the final assessment of the static heat loads in the LHC arc cryostats, using different experimental methods during the first commissioning period in 2007. This assessment further develops and completes previous estimates made during the commissioning of sector 7_8 [1]. The estimate of the helium inventory, a prerequisite for the heat load calculation, is also presented. Heat loads to the cold mass are evaluated from the internal energy balance during natural as well as powered warm-ups of the helium baths in different subsector. The helium inventory is calculated from the internal energy balance during powered warm-ups and matched with previous assessments. Furthermore, heat loads to the thermal shield are estimated from the non-isothermal cooling of the supercritical helium in line E. The comparison of measured heat loads with previous estimates and with budgeted values is then presented, while their correlation with some important parameters like insulation vacuum pressure and some heat ...

Parma, V

2010-01-01T23:59:59.000Z

324

Testing of Replacement Bag Material  

Science Conference Proceedings (OSTI)

Recently, the FB-Line bagout material was changed to simplify the processing of sand, slag, and crucible.The results of the strength tests and the outgassing measurements and calculations demonstrate that the proposed replacement nylon bag materials (HRMP and orange anti-static material) are acceptable substitutes for LDPE and the original nylon with respect to mechanical properties.

Laurinat, J.E.

1998-11-03T23:59:59.000Z

325

Polymer Translocation Dynamics in the Quasi-Static Limit  

E-Print Network (OSTI)

Monte Carlo (MC) simulations are used to study the dynamics of polymer translocation through a nanopore in the limit where the translocation rate is sufficiently slow that the polymer maintains a state of conformational quasi-equilibrium. The system is modeled as a flexible hard-sphere chain that translocates through a cylindrical hole in a hard flat wall. In some calculations, the nanopore is connected at one end to a spherical cavity. Translocation times are measured directly using MC dynamics simulations. For sufficiently narrow pores, translocation is sufficiently slow that the mean translocation time scales with polymer length N according to \\propto (N-N_p)^2, where N_p is the average number of monomers in the nanopore; this scaling is an indication of a quasi-static regime in which polymer-nanopore friction dominates. We use a multiple-histogram method to calculate the variation of the free energy with Q, a coordinate used to quantify the degree of translocation. The free energy functions are used with the Fokker-Planck formalism to calculate translocation time distributions in the quasi-static regime. These calculations also require a friction coefficient, characterized by a quantity N_{eff}, the effective number of monomers whose dynamics are affected by the confinement of the nanopore. This was determined by fixing the mean of the theoretical distribution to that of the distribution obtained from MC dynamics simulations. The theoretical distributions are in excellent quantitative agreement with the distributions obtained directly by the MC dynamics simulations for physically meaningful values of N_{eff}. The free energy functions for narrow-pore systems exhibit oscillations with an amplitude that is sensitive to the nanopore length. Generally, larger oscillation amplitudes correspond to longer translocation times.

James M. Polson; Anthony C. M. McCaffrey

2013-01-09T23:59:59.000Z

326

Standard test methods for determining chemical durability of nuclear, hazardous, and mixed waste glasses and multiphase glass ceramics: The product consistency test (PCT)  

E-Print Network (OSTI)

1.1 These product consistency test methods A and B evaluate the chemical durability of homogeneous glasses, phase separated glasses, devitrified glasses, glass ceramics, and/or multiphase glass ceramic waste forms hereafter collectively referred to as glass waste forms by measuring the concentrations of the chemical species released to a test solution. 1.1.1 Test Method A is a seven-day chemical durability test performed at 90 2C in a leachant of ASTM-Type I water. The test method is static and conducted in stainless steel vessels. Test Method A can specifically be used to evaluate whether the chemical durability and elemental release characteristics of nuclear, hazardous, and mixed glass waste forms have been consistently controlled during production. This test method is applicable to radioactive and simulated glass waste forms as defined above. 1.1.2 Test Method B is a durability test that allows testing at various test durations, test temperatures, mesh size, mass of sample, leachant volume, a...

American Society for Testing and Materials. Philadelphia

2002-01-01T23:59:59.000Z

327

Static four-dimensional abelian black holes in Kaluza-Klein theory  

E-Print Network (OSTI)

Static, four-dimensional (4-d) black holes (BH's) in (4+n)-d Kaluza-Klein (KK) theory with Abelian isometry and diagonal internal metric have at most one electric (Q) and one magnetic (P) charges, which can either come from the same U(1)-gauge field (corresponding to BH's in effective 5-d KK theory) or from different ones (corresponding to BH's with U(1)_M\\times U(1)_E isometry of an effective 6-d KK theory). In the latter case, explicit non-extreme solutions have the global space-time of Schwarzschild BH's, finite temperature, and non-zero entropy. In the extreme (supersymmetric) limit the singularity becomes null, the temperature saturates the upper bound T_H=1/4\\pi\\sqrt{|QP|}, and entropy is zero. A class of KK BH's with constrained charge configurations, exhibiting a continuous electric-magnetic duality, are generated by global SO(n) transformations on the above classes of the solutions.

Cvetic, M; Cvetic, Mirjam; Youm, Donam

1995-01-01T23:59:59.000Z

328

Dynamic compressive behavior of Pr-Nd alloy at high strain rates and temperatures  

Science Conference Proceedings (OSTI)

Based on compressive tests, static on 810 material test system and dynamic on the first compressive loading in split Hopkinson pressure bar (SHPB) tests for Pr-Nd alloy cylinder specimens at high strain rates and temperatures, this study determined a J-C type [G. R. Johnson and W. H. Cook, in Proceedings of Seventh International Symposium on Ballistics (The Hague, The Netherlands, 1983), pp. 541-547] compressive constitutive equation of Pr-Nd alloy. It was recorded by a high speed camera that the Pr-Nd alloy cylinder specimens fractured during the first compressive loading in SHPB tests at high strain rates and temperatures. From high speed camera images, the critical strains of the dynamic shearing instability for Pr-Nd alloy in SHPB tests were determined, which were consistent with that estimated by using Batra and Wei's dynamic shearing instability criterion [R. C. Batra and Z. G. Wei, Int. J. Impact Eng. 34, 448 (2007)] and the determined compressive constitutive equation of Pr-Nd alloy. The transmitted and reflected pulses of SHPB tests for Pr-Nd alloy cylinder specimens computed with the determined compressive constitutive equation of Pr-Nd alloy and Batra and Wei's dynamic shearing instability criterion could be consistent with the experimental data. The fractured Pr-Nd alloy cylinder specimens of compressive tests were investigated by using 3D supper depth digital microscope and scanning electron microscope.

Wang Huanran; Cai Canyuan; Chen Danian [Mechanics and Materials Science Research Center, Ningbo University, Ningbo, Zhejiang 315211 (China); Ma Dongfang [Mechanics and Materials Science Research Center, Ningbo University, Ningbo, Zhejiang 315211 (China); School of Civil Engineering, Henan Polytechnic University, Jiaozuo, Henan 454000 (China)

2012-07-01T23:59:59.000Z

329

Controllability of Static CMOS Circuits for Timing Characterization  

Science Conference Proceedings (OSTI)

Timing violations, also known as delay faults, are a major source of defective silicon in modern Integrated Circuits (ICs), designed in Deep Sub-micron (DSM) technologies, making it imperative to perform delay fault testing in these ICs. However, DSM ... Keywords: Delay fault testing, Design for test, Scan design

Ramyanshu Datta; Ravi Gupta; Antony Sebastine; Jacob A. Abraham; Manuel D'Abreu

2008-10-01T23:59:59.000Z

330

Temperature Fitting Method Predicting Equidistant Voltage Drop of ...  

Science Conference Proceedings (OSTI)

High Temperature Compression Test to Determine the Anode Paste ... Temperature Fitting Method Predicting Equidistant Voltage Drop of Anode Nod in ...

331

Optimized Fan Control In Variable Air Volume HVAC Systems Using Static Pressure Resets: Strategy Selection and Savings Analysis  

E-Print Network (OSTI)

The potential of static pressure reset (SPR) control to save fan energy in variable air volume HVAC systems has been well documented. Current research has focused on the creation of reset strategies depending on specific system features. As the commissioning process has begun to require the prediction of savings, knowledge of the extent to which various SPR control strategies impact fan energy has become increasingly important. This research aims to document existing SPR control strategies and utilize building data and simulation to estimate fan energy use. A comprehensive review of the literature pertaining to SPR control was performed and the results were organized into a top-down flow chart tool. Based on the type of feedback available from a particular system, or lack thereof, this tool will facilitate the selection of a SPR control strategy. A field experiment was conducted on a single duct variable air volume system with fixed discharge air temperature and static pressure setpoints. Finally, an air-side model of the experimental system was created using detailed building design information and calibrated using field measurements. This model was used to estimate the fan energy required to supply the trended airflow data using fixed static pressure (FSP) and SPR control based on zone demand, system demand, and outside air temperature. While utilizing trend data from November 1, 2008 to February 12, 2009, the FSP control of the experimental system was used as the baseline for ranking the energy savings potential of nine different forms of duct static pressure control. The highest savings (73-74%) were achieved using zonal demand based SPR control. System demand based SPR control yielded savings ranging from 59 to 76%, which increased when the duct sensor was positioned near the fan discharge and under similar zone load conditions. The outside air temperature based SPR control yielded savings of 65% since the experimental system supplied primarily perimeter zones. Finally, increasing the FSP setpoint from 2 to 3 inWG increased fan energy by 45%, while decreasing the setpoint from 2 to 1 inWG decreased fan energy by 41%.

Kimla, John

2009-12-01T23:59:59.000Z

332

SQUID-Detected MRI in the Limit of Zero Static Field  

E-Print Network (OSTI)

current flows in the flux transformer; this occurs even for static fieldscurrents and lead to very large fields at the SQUID; if the flux

Kelso, Nathan

2009-01-01T23:59:59.000Z

333

Our Hair Reacts to a Charged Carpet or Static Electricity - So Does ...  

Science Conference Proceedings (OSTI)

Presentation Title, Our Hair Reacts to a Charged Carpet or Static Electricity - So Does Nanomorphology in Organic Photovoltaic Films: The First Demonstration.

334

Optimization Online - Static-arbitrage bounds on the prices of basket ...  

E-Print Network (OSTI)

Jul 19, 2006 ... Static-arbitrage bounds on the prices of basket options via linear programming. Javier Pena (jfp ***at*** andrew.cmu.edu) Juan Vera (jvera...

335

Micro-tensile testing system  

DOE Patents (OSTI)

A micro-tensile testing system providing a stand-alone test platform for testing and reporting physical or engineering properties of test samples of materials having thicknesses of approximately between 0.002 inch and 0.030 inch, including, for example, LiGA engineered materials. The testing system is able to perform a variety of static, dynamic, and cyclic tests. The testing system includes a rigid frame and adjustable gripping supports to minimize measurement errors due to deflection or bending under load; serrated grips for securing the extremely small test sample; high-speed laser scan micrometers for obtaining accurate results; and test software for controlling the testing procedure and reporting results.

Wenski, Edward G. (Lenexa, KS)

2007-08-21T23:59:59.000Z

336

Micro-tensile testing system  

DOE Patents (OSTI)

A micro-tensile testing system providing a stand-alone test platform for testing and reporting physical or engineering properties of test samples of materials having thicknesses of approximately between 0.002 inch and 0.030 inch, including, for example, LiGA engineered materials. The testing system is able to perform a variety of static, dynamic, and cyclic tests. The testing system includes a rigid frame and adjustable gripping supports to minimize measurement errors due to deflection or bending under load; serrated grips for securing the extremely small test sample; high-speed laser scan micrometers for obtaining accurate results; and test software for controlling the testing procedure and reporting results.

Wenski, Edward G. (Lenexa, KS)

2007-07-17T23:59:59.000Z

337

Experimental Analysis of Water Based Drilling Fluid Aging Processes at High Temperature and High Pressure Conditions  

E-Print Network (OSTI)

In efforts to render the safest, fastest, and most cost efficient drilling program for a high temperature and high pressure (HT/HP) well the maximization of drilling operational efficiencies is key. Designing an adequate, HT/HP well specific, drilling fluid is of most importance and a technological challenge that can greatly affect the outcome of the overall operational efficiency. It is necessary to have a sound fundamental understanding of the behavior that water-based muds (WBM) exhibit when exposed to HT/HP conditions. Therefore, in order to adequately design and treat a WBM for a HT/HP well specific drilling program, it is essential that the mud be evaluated at HT/HP conditions. Currently, industry standard techniques used to evaluate WBM characteristics involve aging the fluid sample to a predetermined temperature, based on the anticipated bottom hole temperature (BHT), either statically or dynamically, for a predetermined length, then cooling and mixing the fluid and measuring its rheological properties at a significantly lower temperature. This, along with the fact that the fluid is not subjected to the anticipated bottom hole pressure (BHP) during or after the aging process, brings to question if the properties recorded are those that are truly experienced down-hole. Furthermore, these testing methods do not allow the user to effectively monitor the changes during the aging process. The research in this thesis is focused on evaluating a high performance WBM and the current test procedures used to evaluate their validity. Experimental static and dynamic aging tests were developed for comparative analysis as well to offer a more accurate and precise method to evaluate the effects experienced by WBM when subjected to HT/HP conditions. The experimental tests developed enable the user to monitor and evaluate, in real-time, the rheological changes that occur during the aging of a WBM while being subjected to true BHT and BHP. Detailed standard and experimental aging tests were conducted and suggest that the standard industry tests offer false rheological results with respect to true BHT and BHP. Furthermore, the experimental aging tests show that high pressure has a significant effect on the rheological properties of the WBM at elevated temperatures.

Zigmond, Brandon

2012-08-01T23:59:59.000Z

338

Radiance Temperature  

Science Conference Proceedings (OSTI)

... Temperature using Detectors Calibrated for Absolute Spectral Power Response, HW ... A Third Generation Water Bath Based Blackbody Source, JB ...

2013-06-27T23:59:59.000Z

339

Micromachine friction test apparatus  

DOE Patents (OSTI)

A microelectromechanical (MEM) friction test apparatus is disclosed for determining static or dynamic friction in MEM devices. The friction test apparatus, formed by surface micromachining, is based on a friction pad supported at one end of a cantilevered beam, with the friction pad overlying a contact pad formed on the substrate. A first electrostatic actuator can be used to bring a lower surface of the friction pad into contact with an upper surface of the contact pad with a controlled and adjustable force of contact. A second electrostatic actuator can then be used to bend the cantilevered beam, thereby shortening its length and generating a relative motion between the two contacting surfaces. The displacement of the cantilevered beam can be measured optically and used to determine the static or dynamic friction, including frictional losses and the coefficient of friction between the surfaces. The test apparatus can also be used to assess the reliability of rubbing surfaces in MEM devices by producing and measuring wear of those surfaces. Finally, the friction test apparatus, which is small in size, can be used as an in situ process quality tool for improving the fabrication of MEM devices.

deBoer, Maarten P. (Albuquerque, NM); Redmond, James M. (Albuquerque, NM); Michalske, Terry A. (Cedar Crest, NM)

2002-01-01T23:59:59.000Z

340

On the Maximum Exospheric Temperature of Hydrogen-Dominated Planetary Atmospheres  

Science Conference Proceedings (OSTI)

It is shown that under static conditions the maximum temperature attainable in the exospheres of hydrogen-dominated planetary atmospheres is of order 105 K when gravitational separation between hydrogen and other elements has occurred, and 104 K ...

G. P. Horedt

1982-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "test static temperature" 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

Available transfer capability calculation with transfer based static security-constrained optimal power flow  

Science Conference Proceedings (OSTI)

In power market environment, available transfer capability (ATC) is an important index, indicating the amount of the further usable transmission capacity for commercial trading. ATC calculation is non-trivial when static security constraints are included. ... Keywords: available transfer capability (ATC), optimal power flow, power market, power system, static stability

M. Gandchi; M. Tarafdar Haque; A. Yazdanpanah

2006-03-01T23:59:59.000Z

342

Modeling considerations in static and dynamic voltage stability studies of shipboard power systems  

Science Conference Proceedings (OSTI)

Better modeling is a key issue to system analysis and emulating real system performances accurately. This paper addresses modeling considerations and approaches to be taken for voltage stability analysis. Two approaches, static and dynamic analysis, ... Keywords: PSCAD, dynamic analysis, numerical integration method, static analysis, voltage stability

Minglan Lin; Anurag K. Srivastava; Noel N. Schulz

2007-07-01T23:59:59.000Z

343

Static Analysis on the Detached Column Substructure of Offshore Wind Power Based on Ansys  

Science Conference Proceedings (OSTI)

With the rapid development of wind power technology, offshore wind power has become one of the hottest topics in the worlds energy field. Basic research on wind power attracts more and more attention. This paper uses Ansys software to do static ... Keywords: ansys, etached column, extreme environmental loads, static analysis

Li Fenhua; Guo Weizhao; Liu Yuan; Xing Jian

2010-06-01T23:59:59.000Z

344

DC-AC Inverters for Static Condenser and Dynamic Voltage Restorer Applications  

Science Conference Proceedings (OSTI)

There has been significant recent interest in general classes of power electronic-based active power conditioners such as static condensers and dynamic voltage restorers. These systems are discussed in this paper with a focus on the inverter output stage. ... Keywords: Power Quality, Static var Compensators, Custom Power

Steven R. Ashcraft; S. Mark Halpin

1996-03-01T23:59:59.000Z

345

Defect prediction from static code features: current results, limitations, new approaches  

Science Conference Proceedings (OSTI)

Building quality software is expensive and software quality assurance (QA) budgets are limited. Data miners can learn defect predictors from static code features which can be used to control QA resources; e.g. to focus on the parts of the code predicted ... Keywords: Defect prediction, Static code features, WHICH

Tim Menzies; Zach Milton; Burak Turhan; Bojan Cukic; Yue Jiang; Ay?e Bener

2010-12-01T23:59:59.000Z

346

Review on the determination of alpha_s from the QCD static energy  

E-Print Network (OSTI)

We review the determination of the strong coupling alpha_s from the comparison of the perturbative expression for the Quantum Chromodynamics static energy with lattice data. We collect here all the perturbative expressions needed to evaluate the static energy at the currently known accuracy.

Tormo, Xavier Garcia i

2013-01-01T23:59:59.000Z

347

Temperature impacts on the set pressure of soft seated pressure relief valves  

SciTech Connect

From a safety standpoint, regardless of plant or facility type, the most important pieces of equipment are the pressure relief devices. The most critical characteristics of a pressure relief device are its set pressure and the related relieving capacity. The Set Pressure of a pressure relief device is defined as that value of increasing inlet static pressure at which the discharge becomes continuous (ASME PTC 25-1994, Performance Test Codes). To preclude an unsafe overpressure situation, the set pressure of the pressure relief device must not exceed the maximum allowable working pressure of the equipment or system being protected. Because of testing facility limitations, size or pressure, pressure relief valves intended for elevated temperature service are often set using ambient temperature air. Adjustments are made to the ambient valve opening pressures to compensate for the temperature differences. The extent of the adjustments to the pressure relief valve set pressure is important to ensure the valve will provide the required overpressure protection at the elevated in-service temperature.

Engel, J.J.; Zirps, G.T.; Gleason, R.B. [and others

1995-11-01T23:59:59.000Z

348

Detailed Test Information  

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

Detailed Test Information Detailed Test Information EPA tests vehicles by running them through a series of driving routines, also called cycles or schedules, that specify vehicle speed for each point in time during the laboratory tests. For 2007 and earlier model year vehicles, only the city and highway schedules were used. Beginning with 2008 models, three additional tests will be used to adjust the city and highway estimates to account for higher speeds, air conditioning use, and colder temperatures. Note: EPA has established testing criteria for electric vehicles and plug-in hybrids that are slightly different than those for conventional vehicles. New Tests City Highway High Speed Air Conditioning Cold Temperature Detailed Comparison EPA Federal Test Procedure (City Schedule): Shows vehicle speed (mph) at each second of test

349

Automatic test generation using genetically-engineered distinguishing sequences  

Science Conference Proceedings (OSTI)

A fault-oriented sequential circuit test generator is described in which various types of distinguishing sequences are derived, both statically and dynamically, to aid the test generation process. A two-phase algorithm is used during test generation. ... Keywords: DIGATE, automatic test generation, automatic testing, distinguishing sequence, fault diagnosis, fault effects, flip-flops, genetic algorithm, genetic algorithms, logic testing, sequences, sequential circuit, sequential circuits, two-phase algorithm

M. S. Hsiao; E. M. Rudnick; J. H. Patel

1996-04-01T23:59:59.000Z

350

Influence of technological factors on statics of hydrogen sulfide absorption from coke-oven gas by the ammonia process  

SciTech Connect

The basic technological factors that determine the effectiveness of hydrogen sulfide absorption from coke-oven gas by the cyclic ammonia process are the initial H/sub 2/S content of the gas, the degree of purification, the absorption temperature and the NH/sub 3/ and CO/sub 2/ contents of the absorbent solution. The effects of these factors on the statics of hydrogen sulfide absorption are studied. The investigation is based on the phase-equilibrium distributions of components in the absorption-desorption gas-cleaning cycle. The mathematical model is presented which includes the solution of a system of chemical equilibrium equations for reactions in the solution, material balances, and electrical neutrality. 4 references, 5 figures, 1 table.

Nazarov, V.G.; Kamennykh, B.M.; Rus'yanov, N.D.

1983-01-01T23:59:59.000Z

351

The Static Stability of the Midlatitude Troposphere: The Relevance of Moisture  

Science Conference Proceedings (OSTI)

It is generally accepted that the action of baroclinic waves in midlatitude is responsible for raising the static stability of the troposphere above moist neutrality. Previous efforts to quantify this process have concentrated on the stability ...

M. N. Juckes

2000-09-01T23:59:59.000Z

352

Analysis of Fluctuating Static Pressure Measurements in the National Transonic Facility  

Science Conference Proceedings (OSTI)

Dynamic measurements of fluctuating static pressure levels were taken with flush-mounted, high-frequency response pressure transducers at 11 locations in the circuit of the National Transonic Facility (NTF) across the complete operating range of this ...

Igoe William B.

1996-03-01T23:59:59.000Z

353

On the Height of the Tropopause and the Static Stability of the Troposphere  

Science Conference Proceedings (OSTI)

Speculative arguments are, presented that describe how radiative and dynamical constraints conspire to determine the height of the tropopause and the tropospheric static stability in midlatitudes and in the tropics. The arguments suggest an ...

Issac M. Held

1982-02-01T23:59:59.000Z

354

Static Stability Variations during the Development of an Intense Extratropical Cyclone  

Science Conference Proceedings (OSTI)

The role of static stability (?) is diagnosed for an intense extratropical cyclone that developed over the central United States during 911 January 1975. Results indicate that minimum ?, values occurred in the lower troposphere at 0000 UTC 10 ...

Philip J. Smith; Chih-Hua Tsou

1988-05-01T23:59:59.000Z

355

Optimization of Object-Oriented Programs Using Static Class Hierarchy Analysis  

Science Conference Proceedings (OSTI)

Optimizing compilers for object-oriented languages apply static class analysis and other techniques to try to deduce precise information about the possible classes of the receivers of messages; if successful, dynamically-dispatched messages can be replaced ...

Jeffrey Dean; David Grove; Craig Chambers

1995-08-01T23:59:59.000Z

356

Load-Balancing Solutions for Static Routing Schemes in ATM Networks  

E-Print Network (OSTI)

In this paper, we present two different path ordering algorithms whose aim is balancing the load among network links when used in conjunction with static routing algorithms. Both algorithms have the same aim, but use different heuristics to obtain it.

C. Casetti; R. Lo Cigno; M. Mellia

1999-01-01T23:59:59.000Z

357

Source templates for the automatic generation of adjoint code through static call graph reversal  

Science Conference Proceedings (OSTI)

We present a new approach to the automatic generation of adjoint codes using automatic differentiation by source transformation. Our method relies on static checkpointing techniques applied to an extended version of the program's call graph. A code ...

Uwe Naumann; Jean Utke

2005-05-01T23:59:59.000Z

358

The Static Stability of the Tropopause Region in Adiabatic Baroclinic Life Cycle Experiments  

Science Conference Proceedings (OSTI)

The tropopause inversion layer (TIL) is a region of enhanced static stability just above the WMO-defined thermal tropopause. It is a ubiquitous feature in midlatitudes and is well characterized by observations. However, it is still lacking a ...

Andre R. Erler; Volkmar Wirth

2011-06-01T23:59:59.000Z

359

The Moist Static Energy Budget of a Composite Tropical Intraseasonal Oscillation in a Climate Model  

Science Conference Proceedings (OSTI)

The intraseasonal moist static energy (MSE) budget is analyzed in a climate model that produces realistic eastward-propagating tropical intraseasonal wind and precipitation variability. Consistent with the rechargedischarge paradigm for tropical ...

Eric D. Maloney

2009-02-01T23:59:59.000Z

360

Graphene Enabled Low-Control Quantum Gates between Static and Mobile Spins  

E-Print Network (OSTI)

We show that the feature of Klein tunneling makes graphene a unique interface for implementing low control quantum gates between static and mobile qubits. A ballistic electron spin is considered as the mobile qubit, while the static qubit is the electronic spin of a quantum dot fixed in a graphene nanoribbon. Scattering is the low control mechanism of the gate, which, in other systems, is really difficult to exploit because of both back-scattering and the momentum dependence of scattering. We find that Klein tunneling enables the implementation of quasi-deterministic quantum gates regardless of the momenta or the shape of the wave function of the incident electron. The Dirac equation is used to describe the system in the one particle approximation with the interaction between the static and the mobile spins modelled by a Heisenberg Hamiltonian. Furthermore, we discuss an application of this model to generate entanglement between two well separated static qubits.

G. Cordourier-Maruri; Y. Omar; R. de Coss; S. Bose

2013-06-30T23:59:59.000Z

Note: This page contains sample records for the topic "test static temperature" 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

Method for using global optimization to the estimation of surface-consistent residual statics  

DOE Patents (OSTI)

An efficient method for generating residual statics corrections to compensate for surface-consistent static time shifts in stacked seismic traces. The method includes a step of framing the residual static corrections as a global optimization problem in a parameter space. The method also includes decoupling the global optimization problem involving all seismic traces into several one-dimensional problems. The method further utilizes a Stochastic Pijavskij Tunneling search to eliminate regions in the parameter space where a global minimum is unlikely to exist so that the global minimum may be quickly discovered. The method finds the residual statics corrections by maximizing the total stack power. The stack power is a measure of seismic energy transferred from energy sources to receivers.

Reister, David B. (Knoxville, TN); Barhen, Jacob (Oak Ridge, TN); Oblow, Edward M. (Knoxville, TN)

2001-01-01T23:59:59.000Z

362

Increased Software Reliability Through Input Validation Analysis and Testing  

Science Conference Proceedings (OSTI)

The Input Validation Testing (IVT) technique has been developed to address the problem of statically analyzing input command syntax as defined in English textual interface and requirements specifications and then generating test cases for input validation ... Keywords: Software reliability, requirements analysis, system testing, quality control and assurance, interfaces, input validation

Jane Huffman Hayes; A. Jefferson Offutt

1999-11-01T23:59:59.000Z

363

Static polarizabilities of hydrogen in the B-spline basis set  

Science Conference Proceedings (OSTI)

The static polarizability of the 1s, 2p, and 3d states of the hydrogen atom has been calculated using the B-splines basis set method, and the portion of the polarizability without poles has been calculated using the B-splines Galerkin method. Excellent agreement with exact values has been obtained. The current algorithm improves the efficiency and accuracy over the finite perturbation method. In addition, closure rules are obtained for the static polarizability of these states.

Bhatti, Mohammad I.; Coleman, Kevin D.; Perger, Warren F. [Department of Physics and Geology, University of Texas-Pan American, Edinburg, Texas 78539-2999 (United States); Physics Department, Michigan Technological University, Houghton, Michigan 49931-1295 (United States)

2003-10-01T23:59:59.000Z

364

Standard practice for measurement of the glass dissolution rate using the single-pass flow-through test method  

E-Print Network (OSTI)

1.1 This practice describes a single-pass flow-through (SPFT) test method that can be used to measure the dissolution rate of a homogeneous silicate glass, including nuclear waste glasses, in various test solutions at temperatures less than 100C. Tests may be conducted under conditions in which the effects from dissolved species on the dissolution rate are minimized to measure the forward dissolution rate at specific values of temperature and pH, or to measure the dependence of the dissolution rate on the concentrations of various solute species. 1.2 Tests are conducted by pumping solutions in either a continuous or pulsed flow mode through a reaction cell that contains the test specimen. Tests must be conducted at several solution flow rates to evaluate the effect of the flow rate on the glass dissolution rate. 1.3 This practice excludes static test methods in which flow is simulated by manually removing solution from the reaction cell and replacing it with fresh solution. 1.4 Tests may be conducted wit...

American Society for Testing and Materials. Philadelphia

2010-01-01T23:59:59.000Z

365

Type 1a Supernovae Observations are Consistent with a Static Universe  

E-Print Network (OSTI)

The finding that the widths of type 1a supernovae light curves increase with redshift appears to provide strong evidence for an expanding universe. This paper argues that the observations are consistent with a static cosmology where redshift is produced by a tired-light mechanism. For type 1a supernovae there is a strong correlation between peak luminosity and the width of the light curve, the Phillips relation. In an expanding universe this relation is used to combine the absolute magnitude with the stretch factor to obtain a corrected apparent peak magnitude. In a model for a static universe where width rather than stretch factor is used there is different apparent peak magnitude. Since the analysis program explicitly uses the stretch factor rather than width in its use of the Phillips relation its application in a static universe produces a systematic bias in the peak magnitudes. In addition, the stretch selection that is valid for an expanding universe produces another small bias in the data that must be included in a static universe. The aim of this paper is to show that, using the Phillips relation, and allowing for these biases, the data are consistent with a static model. In a static model the density distribution of type 1a supernovae is independent of redshift. This prediction agrees with the observations.

David F. Crawford

2013-07-24T23:59:59.000Z

366

Light-Sensitive Papers as Controls for Testing Textile ...  

Science Conference Proceedings (OSTI)

... Voltage variations at most substations in the District of ... that temperature specifications for the testing of all ... as well as temperature, in test procedures. ...

2006-03-27T23:59:59.000Z

367

TRENDS: TEMPERATURE  

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

Historical Isotopic Temperature Record from the Vostok Ice Core Historical Isotopic Temperature Record from the Vostok Ice Core Graphics Digital Data J.R. Petit, D. Raynaud, and C. Lorius Laboratoire de Glaciogie et Géophysique de l'Environnement, CNRS, Saint Martin d'Hères Cedex, France J. Jouzel and G. Delaygue Laboratoire des Sciences du Climat et de l'Environnement (LSCE), CEA/CNRS, L'Orme des Merisiers, CEA Saclay, 91191 Gif-sur-Yvette Cedex, France N.I. Barkov Arctic and Antarctic Research Institute, Beringa Street 38, 199397 St. Petersburg, Russia V.M. Kotlyakov Institute of Geography, Staromonetny, per 29, Moscow 109017, Russia DOI: 10.3334/CDIAC/cli.006 Period of Record 420,000 years BP-present Methods Because isotopic fractions of the heavier oxygen-18 (18O) and deuterium (D) in snowfall are temperature-dependent and a strong spatial correlation

368

HyPEP FY-07 Report: Initial Calculations of Component Sizes, Quasi-Static, and Dynamics Analyses  

DOE Green Energy (OSTI)

The Very High Temperature Gas-Cooled Reactor (VHTR) coupled to the High Temperature Steam Electrolysis (HTSE) process is one of two reference integrated systems being investigated by the U.S. Department of Energy and Idaho National Laboratory for the production of hydrogen. In this concept a VHTR outlet temperature of 900 C provides thermal energy and high efficiency electricity for the electrolysis of steam in the HTSE process. In the second reference system the Sulfur Iodine (SI) process is coupled to the VHTR to produce hydrogen thermochemically. This report describes component sizing studies and control system strategies for achieving plant production and operability goals for these two reference systems. The optimal size and design condition for the intermediate heat exchanger, one of the most important components for integration of the VHTR and HTSE plants, was estimated using an analytic model. A partial load schedule and control system was designed for the integrated plant using a quasi-static simulation. Reactor stability for temperature perturbations in the hydrogen plant was investigated using both a simple analytic method and a dynamic simulation. Potential efficiency improvements over the VHTR/HTSE plant were investigated for an alternative design that directly couples a High Temperature Steam Rankin Cycle (HTRC) to the HTSE process. This work was done using the HYSYS code and results for the HTRC/HTSE system were compared to the VHTR/HTSE system. Integration of the VHTR with SI process plants was begun. Using the ASPEN plus code the efficiency was estimated. Finally, this report describes planning for the validation and verification of the HYPEP code.

Chang Oh

2007-07-01T23:59:59.000Z

369

Infrared Thermography Measurements of Window Thermal Test Specimen...  

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

Infrared Thermography Measurements of Window Thermal Test Specimen: Surface Temperatures Title Infrared Thermography Measurements of Window Thermal Test Specimen: Surface...

370

Compression testing of a sintered Ti6Al4V powder compact for biomedical applications  

Science Conference Proceedings (OSTI)

In this study, the compression deformation behavior of a Ti6Al4V powder compact, prepared by the sintering of cold compacted atomized spherical particles (100-200 {mu}m) and containing 36-38% porosity, was investigated at quasi-static (1.6x10{sup -3}-1.6x10{sup -1} s{sup -1}) and high strain rates (300 and 900 s{sup -1}) using, respectively, conventional mechanical testing and Split Hopkinson Pressure Bar techniques. Microscopic studies of as-received powder and sintered powder compact showed that sintering at high temperature (1200 deg. C) and subsequent slow rate of cooling in the furnace changed the microstructure of powder from the acicular alpha ({alpha}) to the Widmanstaetten ({alpha}+{beta}) microstructure. In compression testing, at both quasi-static and high strain rates, the compact failed via shear bands formed along the diagonal axis, 45 deg. to the loading direction. Increasing the strain rate was found to increase both the flow stress and compressive strength of the compact but it did not affect the critical strain for shear localization. Microscopic analyses of failed samples and deformed but not failed samples of the compact further showed that fracture occurred in a ductile (dimpled) mode consisting of void initiation and growth in {alpha} phase and/or at the {alpha}/{beta} interface and macrocracking by void coalescence in the interparticle bond region.

Guden, M. [Department of Mechanical Engineering, Izmir Institute of Technology, Gulbahce Koyu, Urla, Izmir (Turkey); Center for Materials Research, Izmir Institute of Technology, Gulbahce Koyu, Urla, Izmir (Turkey); E-mail: mustafaguden@iyte.edu.tr; Celik, E. [Materials Science and Engineering Program, Izmir Institute of Technology, Gulbahce Koyu, Urla, Izmir (Turkey); Akar, E. [Department of Mechanical Engineering, Izmir Institute of Technology, Gulbahce Koyu, Urla, Izmir (Turkey); Cetiner, S. [Hipokrat A.S., 407/6 Sok., No:10, Pinarbasi, Izmir (Turkey)

2005-05-15T23:59:59.000Z

371

Flow Test | Open Energy Information  

Open Energy Info (EERE)

Flow Test Flow Test Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Flow Test Details Activities (38) Areas (33) Regions (1) NEPA(3) Exploration Technique Information Exploration Group: Downhole Techniques Exploration Sub Group: Well Testing Techniques Parent Exploration Technique: Well Testing Techniques Information Provided by Technique Lithology: Stratigraphic/Structural: Hydrological: Flow tests provide information on permeability, recharge rates, reservoir pressures, fluid chemistry, and scaling. Thermal: Flow tests can measure temperature variations with time to estimate characteristics about the heat source. Dictionary.png Flow Test: Flow tests are typically conducted shortly after a well has been drilled to test its productivity. The well is opened and fluids are released, the

372

Leach test of cladding removal waste grout using Hanford groundwater  

Science Conference Proceedings (OSTI)

This report describes laboratory experiments performed during 1986-1990 designed to produce empirical leach rate data for cladding removal waste (CRW) grout. At the completion of the laboratory work, funding was not available for report completion, and only now during final grout closeout activities is the report published. The leach rates serve as inputs to computer codes used in assessing the potential risk from the migration of waste species from disposed grout. This report discusses chemical analyses conducted on samples of CRW grout, and the results of geochemical computer code calculations that help identify mechanisms involved in the leaching process. The semi-infinite solid diffusion model was selected as the most representative model for describing leaching of grouts. The use of this model with empirically derived leach constants yields conservative predictions of waste release rates, provided no significant changes occur in the grout leach processes over long time periods. The test methods included three types of leach tests--the American Nuclear Society (ANS) 16.1 intermittent solution exchange test, a static leach test, and a once-through flow column test. The synthetic CRW used in the tests was prepared in five batches using simulated liquid waste spiked with several radionuclides: iodine ({sup 125}I), carbon ({sup 14}C), technetium ({sup 99}Tc), cesium ({sup 137}Cs), strontium ({sup 85}Sr), americium ({sup 241}Am), and plutonium ({sup 238}Pu). The grout was formed by mixing the simulated liquid waste with dry blend containing Type I and Type II Portland cement, class F fly ash, Indian Red Pottery clay, and calcium hydroxide. The mixture was allowed to set and cure at room temperature in closed containers for at least 46 days before it was tested.

Serne, R.J.; Martin, W.J.; Legore, V.L.

1995-09-01T23:59:59.000Z

373

Next-to-leading order static gluon self-energy for anisotropic plasmas  

SciTech Connect

In this paper the structure of the next-to-leading order static gluon self-energy for an anisotropic plasma is investigated in the limit of a small momentum space anisotropy. Using the Ward identities for the static hard-loop (HL) gluon polarization tensor and the (nontrivial) static HL vertices, we derive a comparatively compact form for the complete next-to-leading order correction to the structure function containing the spacelike pole associated with magnetic instabilities. On the basis of a calculation without HL vertices, it has been conjectured that the imaginary part of this structure function is nonzero, rendering the spacelike poles integrable. We show that there are both positive and negative contributions when HL vertices are included, highlighting the necessity of a complete numerical evaluation, for which the present work provides the basis.

Carrington, M. E.; Rebhan, A. [Brandon University, Brandon, Manitoba, R7A 6A9 (Canada); Winnipeg Institute for Theoretical Physics, Winnipeg, Manitoba (Canada); Institut fuer Theoretische Physik, Technische Universitaet Wien, Wiedner Hauptstrasse 8-10, A-1040 Vienna (Austria)

2009-01-15T23:59:59.000Z

374

Dynamic performance and control of a static var generator using cascade multilevel inverters  

SciTech Connect

A cascade multilevel inverter is proposed for static VAR shifting, compensation/generation applications. The new cascade M-level inverter consists of (M-1)/2 single-phase full bridges in which each bridge has its own separate dc source. This inverter can generate almost sinusoidal waveform voltage with only one time switching per cycle. It can eliminate the need for transformers in multipulse inverters. A prototype static VAR generator (SVG) system using 11- level cascade inverter (21-level line-to-line voltage waveform) has been built. The output voltage waveform is equivalent to that of a 60- pulse inverter. This paper focuses on dynamic performance of the cascade inverter based SVG system. Control schemes are proposed to achieve a fast response which is impossible for a conventional static VAR compensator (SVC). Analytical, simulated and experimental results show the superiority of the proposed SVG system.

Peng, Fang Zheng [Tennessee Univ., Knoxville, TN (United States); Lai, Jih-Sheng [Oak Ridge National Lab., TN (United States)

1996-10-01T23:59:59.000Z

375

ORNL Quasi-Static Mechanical Characterization and Analysis: FY09 Annual Report to TARDEC  

SciTech Connect

The testing and evaluation of candidate glasses for transparent armor served as a primary goal. Other armor ceramics were evaluated too, in support of the development of innovative test methods, whose use will ultimately help in the improvement of armor ceramics or help in better predicting their ballistic performance. The following summarizes this report and this year's work: (1) The elastic properties of a spherical indenter affect the forces necessary to initiate fracture in a target ceramics. The lower the elastic modulus of an indenter material, the easier (i.e., lower forces required) it is to initiate fracture. This implies the fracture initiation of an armor ceramic will depend on the elastic properties of a projectile material, and that this effect, represented by the Dundurs Parameter, can be managed to guide improvement of both armor and projectile materials. (2) The largest flaws in a population dictate both contact damage and fracture initiations. This implies the ballistic response of armor ceramics will improve if those large flaws are precluded from appearing in the materials during their processing. (3) Failure stress dependence on effective area for Hertzian indentation was developed. Such analysis is adaptable to predict ballistically produced fracture initiation as a function of projectile material and projectile size. (4) A simple, quick, and inexpensive test method was developed to measure the apparent yield stress of armor ceramics. This is significant because yield stress is used as input in ballistic models, and yield stress is traditionally measured using (complex, timeconsuming, and expensive) shock physics experiments. (5) Radial confinement increases the necessary indentation forces to initiate fracture and yield-like responses in ceramics. Ballistic improvement of an armor ceramic will occur if the ceramic can be compressively pre-stressed. (6) The median crack produced by a Hertzian indent is associated with a dramatic increase in target ceramic compliance. More so than any other produced damage mechanism. This suggests that a ballistically induced median crack in an armor ceramic may be associated with the dwell penetration event. (7) Glass exhibits tensile strength that is very much dependent on the amount of material, the side being tested (air versus tin if a float glass), and where it is being tensile stressed (in the middle or near an edge). The management of these effects will improve ballistic resistance of transparent armor (or any ceramic armor that is undergoing deflection as a consequence of a ballistic impact). (8) Plasma-arc heat treatment is a quick and relatively inexpensive method to improve the strength of glass. It is implementable into the production line for the mass production of glass. Increased strain-to-failure and bending deflections are concomitant with increased strength, and therefore, ballistic resistance is improvable using this method. (9) The Hertzian stress field at high contact stresses is very similar to the stress field from a ballistic impact. This is significant because the results from Hertzian indentation measurements have the prospect of being used as input in ballistic models to predict dwell conditions. (10) The understanding of glass densification and fragmentation behaviors are aided by piezo-Raman spectroscopy and quasi-static, high-energy fracture. Continued refinement of these test methods will improve the understanding of glass impact resistance. (11) In addition to glass, strength-size scaling was evident in SiC and B{sub 4}C. Previously proposed strength dependencies on rate from shock experiments may instead be explained by this strength-size scaling effect. (12) The quantification of strength-size scaling in armor ceramics clearly shows there is no single strength value that can be used to describe that ceramic. A ballistic modeler can therefore use more appropriate failure stress value(s) as input to predict deflection and expanding cavity responses in the ceramic target. These follow-on efforts are recommended based on the above statem

Wereszczak, Andrew A [ORNL; Kirkland, Timothy Philip [ORNL; Strong, Kevin T [ORNL; Holmquist, Timothy [SWRI

2009-12-01T23:59:59.000Z

376

Beamline Temperatures  

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

Temperatures Temperatures Energy: 3.0000 GeV Current: 493.2242 mA Date: 11-Jan-2014 21:40:00 Beamline Temperatures Energy 3.0000 GeV Current 493.2 mA 11-Jan-2014 21:40:00 LN:MainTankLevel 124.4 in LN:MainTankPress 56.9 psi SPEAR-BL:B120HeFlow 15.4 l/min SPEAR-BL:B131HeFlow 22.2 l/min BL 4 BL02:LCW 0.0 ℃ BL02:M0_LCW 31.5 ℃ BL 4-1 BL04-1:BasePlate -14.0 ℃ BL04-1:Bottom1 46.0 ℃ BL04-1:Bottom2 47.0 ℃ BL04-1:Lower 32.0 ℃ BL04-1:Moly 46.0 ℃ BL04-1:ChinGuard1 31.0 ℃ BL04-1:ChinGuard2 31.0 ℃ BL04-1:FirstXtalA -167.0 ℃ BL04-1:FirstXtalB -172.0 ℃ BL04-1:Pad1 31.0 ℃ BL04-1:Pad2 31.0 ℃ BL04-1:SecondXtalA -177.0 ℃ BL04-1:SecondXtalB -175.0 ℃ BL 4-2 BL04-2:BasePlate -14.0 ℃ BL04-2:Bottom1 24.0 ℃ BL04-2:Bottom2 25.0 ℃

377

New framework for studying spherically symmetric static solutions in f(R) gravity  

Science Conference Proceedings (OSTI)

We develop a new covariant formalism to treat spherically symmetric spacetimes in metric f(R) theories of gravity. Using this formalism we derive the general equations for a static and spherically symmetric metric in a general f(R) gravity. These equations are used to determine the conditions for which the Schwarzschild metric is the only vacuum solution with vanishing Ricci scalar. We also show that our general framework provides a clear way of showing that the Schwarzschild solution is not a unique static spherically symmetric solution, providing some insight into how the current form of Birkhoff's theorem breaks down for these theories.

Nzioki, Anne Marie; Goswami, Rituparno [Astrophysics, Cosmology and Gravity Centre (ACGC), University of Cape Town, Rondebosch, 7701 (South Africa); Department of Mathematics and Applied Mathematics, University of Cape Town, Rondebosch, 7701 (South Africa); Carloni, Sante [Institut d'Estudis Espacials de Catalunya (IEEC), Campus UAB, Facultat Ciencies, Torre C5-Par-2a pl, E-08193 Bellaterra (Barcelona) (Spain); Dunsby, Peter K. S. [Astrophysics, Cosmology and Gravity Centre (ACGC), University of Cape Town, Rondebosch, 7701 (South Africa); Department of Mathematics and Applied Mathematics, University of Cape Town, Rondebosch, 7701 (South Africa); South African Astronomical Observatory, Observatory, Cape Town (South Africa)

2010-04-15T23:59:59.000Z

378

Final report of the Static Bonding Team, Pantex Plant, Amarillo, Texas  

Science Conference Proceedings (OSTI)

The integrity of the electrostatic bonding procedures used to equilibrate operating technicians and weapon components was questioned during the course of the quality evaluation assessments of the W70, W68, and B57 dismantlement programs. A multi-disciplined, interlaboratory team was convened on an ad hoc basis to resolve certain static bonding issues. The accomplishments of this team in upgrading the integrity of the bonding process include recommendations on the proper use of wrist straps, training of technicians in their use, and procedures to reduce accumulation of static charge on components during routine handling operations.

Jones, R.D.; Chen, K.C.; Holmes, S.W.

1993-12-01T23:59:59.000Z

379

Equations for static vacuum solutions arising from trace dynamics modifications to gravitation  

E-Print Network (OSTI)

We derive the equations governing static, spherically symmetric vacuum solutions to the Einstein equations as modified by the frame-dependent effective action arising from trace dynamics. We give several equivalent forms of the master second order, nonlinear differential equation implied by the trace dynamics effective action, and calculate the leading perturbative correction to the Schwarzschild metric. We then analyze the master equation in the regimes $r \\to 0$, $r \\to \\infty$, and $0symmetric case, we calculate the leading effective action corrections to the spatial components of the Einstein equations, which furnish the starting point for a similar analysis (yet to be done) of the static, axially symmetric case.

Stephen L. Adler

2013-08-07T23:59:59.000Z

380

Group 3: Humidity, Temperature, and Voltage (Presentation)  

DOE Green Energy (OSTI)

Group 3 is chartered to develop accelerated stress tests that can be used as comparative predictors of module lifetime versus stresses associated with humidity, temperature and voltage.

Wohlgemuth, J.

2013-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "test static temperature" 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

Galveston Test | Open Energy Information  

Open Energy Info (EERE)

Test Test Jump to: navigation, search Name Galveston Test Facility Galveston Test Sector Wind energy Facility Type Offshore Wind Facility Status Proposed Owner Coastal Point Energy LLC Developer Galveston Offshore Wind LLC Location Gulf of Mexico TX Coordinates 29.161°, -94.773° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":29.161,"lon":-94.773,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

382

Analyze of the influence of a static var compensator in operation of a electrical energy industrial system with a cogeneration.  

E-Print Network (OSTI)

??In this work is analyzed the influence of a static var compensator (SVC) on the electromechanical stability of the electrical energy system of the industrial (more)

GILSON SOARES DA SILVA JNIOR

2008-01-01T23:59:59.000Z

383

Creep-fatigue of High Temperature Materials for VHTR: Effect of Cyclic Loading and Environment  

SciTech Connect

Alloy 617 is the one of the leading candidate materials for Intermediate Heat eXchangers (IHX) of a Very High Temperature Reactor (VHTR). System start-ups and shut-downs as well as power transients will produce low cycle fatigue (LCF) loadings of components. Furthermore, the anticipated IHX operating temperature, up to 950C, is in the range of creep so that creep-fatigue interaction, which can significantly increase the fatigue crack growth, may be one of the primary IHX damage modes. To address the needs for Alloy 617 codification and licensing, a significant creep-fatigue testing program is underway at Idaho National Laboratory. Strain controlled LCF tests including hold times up to 1800s at maximum tensile strain were conducted at total strain range of 0.3% and 0.6% in air at 950C. Creep-fatigue testing was also performed in a simulated VHTR impure helium coolant for selected experimental conditions. The creep-fatigue tests resulted in failure times up to 1000 hrs. Fatigue resistance was significantly decreased when a hold time was added at peak stress and when the total strain was increased. The fracture mode also changed from transgranular to intergranular with introduction of a tensile hold. Changes in the microstructure were methodically characterized. A combined effect of temperature, cyclic and static loading and environment was evidenced in the targeted operating conditions of the IHX. This paper This paper reviews the data previously published by Carroll and co-workers in references 10 and 11 focusing on the role of inelastic strain accumulation and of oxidation in the initiation and propagation of surface fatigue cracks.

Celine Cabet; L. Carroll; R. Wright; R. Madland

2011-05-01T23:59:59.000Z

384

The static electric polarizability of a particle bound by a finite potential well  

E-Print Network (OSTI)

In this paper we derive an expression for the static electric polarizability of a particle bound by a finite potential well without the explicit use of the continuum states in our calculations. This will be accomplished by employing the elegant Dalgarno-Lewis perturbative technique.

M. A. Maize; M. A. Antonacci

2010-02-23T23:59:59.000Z

385

Combined quasi-static backward modeling and look-ahead fuzzy control of vehicles  

Science Conference Proceedings (OSTI)

Vehicle modeling can play an important role in vehicle power train design, control and energy management investigation. This paper presents a method for vehicle power train modeling. The key feature of the method is its presentation of the dynamic of ... Keywords: Fuzzy logic, Look-ahead controller, Power train vehicle modeling, Quasi-static backward facing, Simulation

Behnam Ganji; Abbas Z. Kouzani

2012-01-01T23:59:59.000Z

386

GEOGRAPHICALLY STATIC QUORUMS IN AD-HOC NETWORKS AND THEIR PERFORMANCE AS LOCATION SERVERS  

E-Print Network (OSTI)

other without being in transmission range by relaying their messages through intermediate nodes. Routing a function that maps a node's ID to its location, but whilst this is ideal when networks are static into grid-squares of different orders. Starting with the grid-square that the node currently occupies

Kent, University of

387

Impacts of Shallow Convection on MJO Simulation: A Moist Static Energy and Moisture Budget Analysis  

Science Conference Proceedings (OSTI)

The role of shallow convection in MaddenJulian oscillation (MJO) simulation is examined in terms of the moist static energy (MSE) and moisture budgets. Two experiments are carried out using the NCAR Community Atmosphere Model, version 3.0 (CAM3.0)...

Qiongqiong Cai; Guang J. Zhang; Tianjun Zhou

2013-04-01T23:59:59.000Z

388

Report Title: Mapping of Reservoir Properties and Facies Through Integration of Static and Dynamic Data  

E-Print Network (OSTI)

Data Report Type: Annual Technical Report Reporting Period Start Date: October 1, 2000 Reporting PeriodReport Title: Mapping of Reservoir Properties and Facies Through Integration of Static and Dynamic, Ruijian Li, Yafes Abacioglu & Yannong Dong Date Report Issued: December 2001 DOE Award Number: DE-FC26

Reynolds, Albert C.

389

Wind Farm Power Maximization Based On A Cooperative Static Game Approach  

E-Print Network (OSTI)

Wind Farm Power Maximization Based On A Cooperative Static Game Approach Jinkyoo Parka, Soonduck efficiency of wind farms using cooperative control. The key factors in determining the power production and the loading for a wind turbine are the nacelle yaw and blade pitch angles. However, the nacelle and blade

Stanford University

390

Radiative pion-proton scattering in the static Chew--Low model  

SciTech Connect

The results of a nonrelativistic calculation of $pi$/sup +-/-proton bremsstrahlung cross sections at the pion laboratory kinetic energy of 298 MeV for backward photon angles is presented. The $pi$p interaction is described by the static Chew-Low model. (auth)

Ho-Kim, Q.; Lavine, J.P.

1975-01-01T23:59:59.000Z

391

Static analysis for probabilistic programs: inferring whole program properties from finitely many paths  

Science Conference Proceedings (OSTI)

We propose an approach for the static analysis of probabilistic programs that sense, manipulate, and control based on uncertain data. Examples include programs used in risk analysis, medical decision making and cyber-physical systems. Correctness properties ... Keywords: monte-carlo sampling, probabilistic programming, program verification, symbolic execution, volume bounding

Sriram Sankaranarayanan; Aleksandar Chakarov; Sumit Gulwani

2013-06-01T23:59:59.000Z

392

Mapping of Reservoir Properties and Facies Through Integration of Static and Dynamic Data  

Science Conference Proceedings (OSTI)

The goal of this project was to develop computationally efficient automatic history matching techniques for generating geologically plausible reservoir models which honor both static and dynamic data. Solution of this problem is necessary for the quantification of uncertainty in future reservoir performance predictions and for the optimization of reservoir management.

Oliver, Dean S.; Reynolds, Albert C.; Zhang, Fengjun; Li, Ruijian; Abacioglu, Yafes; Dong, Yannong

2002-03-05T23:59:59.000Z

393

Static magnetic fields: A summary of biological interactions, potential health effects, and exposure guidelines  

SciTech Connect

Interest in the mechanisms of interaction and the biological effects of static magnetic fields has increased significantly during the past two decades as a result of the growing number of applications of these fields in research, industry and medicine. A major stimulus for research on the bioeffects of static magnetic fields has been the effort to develop new technologies for energy production and storage that utilize intense magnetic fields (e.g., thermonuclear fusion reactors and superconducting magnet energy storage devices). Interest in the possible biological interactions and health effects of static magnetic fields has also been increased as a result of recent developments in magnetic levitation as a mode of public transportation. In addition, the rapid emergence of magnetic resonance imaging as a new clinical diagnostic procedure has, in recent years, provided a strong rationale for defining the possible biological effects of magnetic fields with high flux densities. In this review, the principal interaction mechanisms of static magnetic fields will be described, and a summary will be given of the present state of knowledge of the biological, environmental, and human health effects of these fields.

Tenforde, T.S.

1992-05-01T23:59:59.000Z

394

Two-dimensional description of D-dimensional static black holes with pointlike sources  

E-Print Network (OSTI)

We derive two-dimensional (2D) solutions of a generic dilaton gravity model coupled with matter, which describe D-dimensional static black holes with pointlike sources. The equality between the mass M of the D-dimensional gravitational solution and the mass m of the source can be preserved also at the level of the 2D gravity model.

Mariano Cadoni; Salvatore Mignemi

2005-03-14T23:59:59.000Z

395

Heuristic static load-balancing algorithm applied to the fragment molecular orbital method  

Science Conference Proceedings (OSTI)

In the era of petascale supercomputing, the importance of load balancing is crucial. Although dynamic load balancing is widespread, it is increasingly difficult to implement effectively with thousands of processors or more, prompting a second look at ... Keywords: FMO, GAMESS, MINLP, dynamic load balancing, fragment molecular orbitals, heuristic algorithm, optimization, protein-ligand complex, quantum chemistry, static load balancing

Yuri Alexeev; Ashutosh Mahajan; Sven Leyffer; Graham Fletcher; Dmitri G. Fedorov

2012-11-01T23:59:59.000Z

396

Nano-structured vanadium: processing and mechanical properties under quasi-static and dynamic compression  

E-Print Network (OSTI)

Nano-structured vanadium: processing and mechanical properties under quasi-static and dynamic form 16 September 2003; accepted 9 October 2003 Abstract We have processed fully dense, nano that the grain size of the consolidated V is around 100 nm. Mechanical properties of the nano-structured V were

Wei, Qiuming

397

Aging discrepancies of white spruce affect the interpretation of static age structure in boreal  

E-Print Network (OSTI)

NOTE Aging discrepancies of white spruce affect the interpretation of static age structure. Our objectives were to determine whether ground-level ring counts underestimate root collar age of understory P. glauca and whether aging errors increase with stand age. Trees were collected from one to nine

Macdonald, Ellen

398

Symposium Proceedings: Transformer Reliability: Management of Static Electrification in Power Transformers  

Science Conference Proceedings (OSTI)

Certain mitigation procedures could have prevented most of the known static electrification failures of very large forced-oil-cooled power transformers. This conclusion was confirmed at an EPRI-sponsored symposium where participants shared worldwide research results and field experiences spanning 15 years.

1999-11-11T23:59:59.000Z

399

Quasi-Static Analysis for Subsidence of Stacked B-25 Boxes  

Science Conference Proceedings (OSTI)

This paper presents a quasi-static technique to evaluate the structural deformation of the four stacked B-25 boxes subjected to the static loads of overlaying soil and to determine the effect of corrosion on the deformation. Although the boxes are subjected to a static load, the structural responses of the boxes vary with time. The analytical results indeed show that the deflection, buckling and post buckling of the components of the stacked boxes occur in sequence rather than simultaneously. Therefore, it is more appropriate to treat the problems considered as quasistatic rather than static; namely, the structural response of the stacked boxes are dynamic but with very long duration. Furthermore, the finite-element model has complex contact and slide conditions between the interfaces of the adjoining components, and thus its numerical solution is more tractable by using explicit time integration schemes. The analysis covers the three corrosion scenarios following various time lengths of initial burial under an interim soil cover. The results qualitatively agree with expected differences in deformation for different degrees of corrosion subsidence potential reduction that can be achieved.

Wu, Tsu-te; Jones, William E.; Phifer, Mark A.

2005-05-24T23:59:59.000Z

400

Burgett Geothermal Greenhouses Greenhouse Low Temperature Geothermal  

Open Energy Info (EERE)

Burgett Geothermal Greenhouses Greenhouse Low Temperature Geothermal Burgett Geothermal Greenhouses Greenhouse Low Temperature Geothermal Facility Jump to: navigation, search Name Burgett Geothermal Greenhouses Greenhouse Low Temperature Geothermal Facility Facility Burgett Geothermal Greenhouses Sector Geothermal energy Type Greenhouse Location Cotton City, New Mexico Coordinates Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[]}

Note: This page contains sample records for the topic "test static temperature" 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

Castlevalley Greenhouses Greenhouse Low Temperature Geothermal Facility |  

Open Energy Info (EERE)

Castlevalley Greenhouses Greenhouse Low Temperature Geothermal Facility Castlevalley Greenhouses Greenhouse Low Temperature Geothermal Facility Jump to: navigation, search Name Castlevalley Greenhouses Greenhouse Low Temperature Geothermal Facility Facility Castlevalley Greenhouses Sector Geothermal energy Type Greenhouse Location Newcastle, Utah Coordinates 37.6666413°, -113.549406° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[]}

402

Integrated Ingredients Dehydrated Agricultural Drying Low Temperature  

Open Energy Info (EERE)

Ingredients Dehydrated Agricultural Drying Low Temperature Ingredients Dehydrated Agricultural Drying Low Temperature Geothermal Facility Jump to: navigation, search Name Integrated Ingredients Dehydrated Agricultural Drying Low Temperature Geothermal Facility Facility Integrated Ingredients Dehydrated Sector Geothermal energy Type Agricultural Drying Location Empire, Nevada Coordinates 40.5757352°, -119.34213° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[]}

403

SWTDI Geothermal Aquaculture Facility Aquaculture Low Temperature  

Open Energy Info (EERE)

SWTDI Geothermal Aquaculture Facility Aquaculture Low Temperature SWTDI Geothermal Aquaculture Facility Aquaculture Low Temperature Geothermal Facility Jump to: navigation, search Name SWTDI Geothermal Aquaculture Facility Aquaculture Low Temperature Geothermal Facility Facility SWTDI Geothermal Aquaculture Facility Sector Geothermal energy Type Aquaculture Location Las Cruces, New Mexico Coordinates 32.3123157°, -106.7783374° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[]}

404

The effect of structural defects in SiC particles on the static & dynamic mechanical response of a 15 volume percent SiC/6061-Al matrix composite  

SciTech Connect

Static and Dynamic mechanical tests, and microstructural examinations performed on a SiC particle reinforced 6061-Al matrix composite indicated that particle cracking significantly affected the strength, strain hardening, and failure mechanism of the composite. Cracks were observed to nucleate and propagate on stacking faults and interfaces between the various phases within the reinforcing SiC particles. Planar defects were the predominant artifacts seen in the SiC particles. Partial dislocations were also observed bounding the stacking faults within the reinforcement phase.

Vaidya, R.U.; Song, S.G.; Zurek, A.K.; Gray, G.T. III

1995-09-01T23:59:59.000Z

405

RMOTC - Testing - Geothermal  

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

Geothermal Testing Geothermal Testing Notice: As of July 15th 2013, the Department of Energy announced the intent to sell Naval Petroleum Reserve Number 3 (NPR3). The sale of NPR-3 will also include the sale of all equipment and materials onsite. A decision has been made by the Department of Energy to complete testing at RMOTC by July 1st, 2014. RMOTC will complete testing in the coming year with the currently scheduled testing partners. For more information on the sale of NPR-3 and sale of RMOTC equipment and materials please join our mailing list here. With the existing geologic structure at RMOTC, promising potential exists for Enhanced Geothermal System (EGS) testing. The field also has two reliable water resources for supporting low-temperature geothermal testing.

406

Modeling the performance of a two-phase turbine using numerical methods and the results of nozzle, static cascade, and windage experiments  

DOE Green Energy (OSTI)

Performance models for a two-phase turbine were developed to verify the understanding of the loss mechanisms and to extrapolate from the single-nozzle test condition to a full-admission turbine. The numerical models for predicting the performance of the nozzle and the combined nozzle and rotor are described. Results from two-phase, static cascade tests and disk-friction and windage experiments are used to calibrate the performance model(s). Model predictions are compared with single-nozzle prototype-turbine test results, and extrapolations are made to a full-admission design. The modeling also provides predictions of performance for turbines with various blade geometries, inlet conditions, and droplet sizes. Thus the modeling provides insight into design improvements.

Comfort, W.J. III

1978-06-21T23:59:59.000Z

407

SER Temperature Coefficient  

SciTech Connect

Experimentally determine the overall isothermal temperature coefficient of the SER up to the design operating temperatures.

Johnson, J.L.

1959-12-31T23:59:59.000Z

408

Melozi Greenhouse Low Temperature Geothermal Facility | Open Energy  

Open Energy Info (EERE)

Greenhouse Low Temperature Geothermal Facility Greenhouse Low Temperature Geothermal Facility Jump to: navigation, search Name Melozi Greenhouse Low Temperature Geothermal Facility Facility Melozi Sector Geothermal energy Type Greenhouse Location Yukon, Alaska Coordinates Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[]}

409

Hot Hydrogen Test Facility  

DOE Green Energy (OSTI)

The core in a nuclear thermal rocket will operate at high temperatures and in hydrogen. One of the important parameters in evaluating the performance of a nuclear thermal rocket is specific impulse, ISp. This quantity is proportional to the square root of the propellants absolute temperature and inversely proportional to square root of its molecular weight. Therefore, high temperature hydrogen is a favored propellant of nuclear thermal rocket designers. Previous work has shown that one of the life-limiting phenomena for thermal rocket nuclear cores is mass loss of fuel to flowing hydrogen at high temperatures. The hot hydrogen test facility located at the Idaho National Lab (INL) is designed to test suitability of different core materials in 2500C hydrogen flowing at 1500 liters per minute. The facility is intended to test non-uranium containing materials and therefore is particularly suited for testing potential cladding and coating materials. In this first installment the facility is described. Automated Data acquisition, flow and temperature control, vessel compatibility with various core geometries and overall capabilities are discussed.

W. David Swank

2007-02-01T23:59:59.000Z

410

Investigations into High Temperature Components and Packaging  

SciTech Connect

The purpose of this report is to document the work that was performed at the Oak Ridge National Laboratory (ORNL) in support of the development of high temperature power electronics and components with monies remaining from the Semikron High Temperature Inverter Project managed by the National Energy Technology Laboratory (NETL). High temperature electronic components are needed to allow inverters to operate in more extreme operating conditions as required in advanced traction drive applications. The trend to try to eliminate secondary cooling loops and utilize the internal combustion (IC) cooling system, which operates with approximately 105 C water/ethylene glycol coolant at the output of the radiator, is necessary to further reduce vehicle costs and weight. The activity documented in this report includes development and testing of high temperature components, activities in support of high temperature testing, an assessment of several component packaging methods, and how elevated operating temperatures would impact their reliability. This report is organized with testing of new high temperature capacitors in Section 2 and testing of new 150 C junction temperature trench insulated gate bipolar transistor (IGBTs) in Section 3. Section 4 addresses some operational OPAL-GT information, which was necessary for developing module level tests. Section 5 summarizes calibration of equipment needed for the high temperature testing. Section 6 details some additional work that was funded on silicon carbide (SiC) device testing for high temperature use, and Section 7 is the complete text of a report funded from this effort summarizing packaging methods and their reliability issues for use in high temperature power electronics. Components were tested to evaluate the performance characteristics of the component at different operating temperatures. The temperature of the component is determined by the ambient temperature (i.e., temperature surrounding the device) plus the temperature increase inside the device due the internal heat that is generated due to conduction and switching losses. Capacitors and high current switches that are reliable and meet performance specifications over an increased temperature range are necessary to realize electronics needed for hybrid-electric vehicles (HEVs), fuel cell (FC) and plug-in HEVs (PHEVs). In addition to individual component level testing, it is necessary to evaluate and perform long term module level testing to ascertain the effects of high temperature operation on power electronics.

Marlino, L.D.; Seiber, L.E.; Scudiere, M.B.; M.S. Chinthavali, M.S.; McCluskey, F.P.

2007-12-31T23:59:59.000Z

411

Impact of SCIG and DFIG Type Wind Turbine on the Stability of Distribution Networks: static and dynamic  

E-Print Network (OSTI)

Impact of SCIG and DFIG Type Wind Turbine on the Stability of Distribution Networks: static fed induction generator (DFIG) type wind turbine in distribution networks. The analysis is carried out and DFIG type wind turbines have significant impact on the static voltage stability, power loss

Pota, Himanshu Roy

412

Energy distribution of the Einstein-Klein-Gordon system for a static spherically symmetric spacetime in (2+1)-dimensions  

E-Print Network (OSTI)

We use Moeller's energy-momentum complex in order to explicitly compute the energy and momentum density distributions for an exact solution of Einstein's field equations with a negative cosmological constant minimally coupled to a static massless scalar field in a static, spherically symmetric background in (2+1)-dimensions.

I. Radinschi; Th. Grammenos

2005-08-01T23:59:59.000Z

413

Chesapeake Testing  

Science Conference Proceedings (OSTI)

... Send E-Mail to NVLAP at: NVLAP@nist.gov. Personal Body Armor Testing. ... 7 Ballistic Resistance of Body Armor, Section 7, Ballistic Test Methods. ...

2014-01-03T23:59:59.000Z

414

Brine flow up a borehole caused by pressure perturbation from CO2 storage: Static and dynamic evaluations  

SciTech Connect

Industrial-scale storage of CO{sub 2} in saline sedimentary basins will cause zones of elevated pressure, larger than the CO{sub 2} plume itself. If permeable conduits (e.g., leaking wells) exist between the injection reservoir and overlying shallow aquifers, brine could be pushed upwards along these conduits and mix with groundwater resources. This paper discusses the potential for such brine leakage to occur in temperature- and salinity-stratified systems. Using static mass-balance calculations as well as dynamic well flow simulations, we evaluate the minimum reservoir pressure that would generate continuous migration of brine up a leaking wellbore into a freshwater aquifer. Since the brine invading the well is denser than the initial fluid in the wellbore, continuous flow only occurs if the pressure perturbation in the reservoir is large enough to overcome the increased fluid column weight after full invasion of brine into the well. If the threshold pressure is exceeded, brine flow rates are dependent on various hydraulic (and other) properties, in particular the effective permeability of the wellbore and the magnitude of pressure increase. If brine flow occurs outside of the well casing, e.g., in a permeable fracture zone between the well cement and the formation, the fluid/solute transfer between the migrating fluid and the surrounding rock units can strongly retard brine flow. At the same time, the threshold pressure for continuous flow to occur decreases compared to a case with no fluid/solute transfer.

Birkholzer, J.T.; Nicot, J.-P.; Oldenburg, C.M.; Zhou, Q.; Kraemer, S.; Bandilla, K.W.

2011-05-01T23:59:59.000Z

415

Molecular Chemical Engines: Pseudo-Static Processes and the Mechanism of Energy Transduction  

E-Print Network (OSTI)

We propose a simple theoretical model for a molecular chemical engine that catalyzes a chemical reaction and converts the free energy released by the reaction into mechanical work. Binding and unbinding processes of reactant and product molecules to and from the engine are explicitly taken into account. The work delivered by the engine is calculated analytically for infinitely slow (``pseudo-static'') processes, which can be reversible (quasi-static) or irreversible, controlled by an external agent. It is shown that the work larger than the maximum value limited by the second law of thermodynamics can be obtained in a single cycle of operation by chance, although the statistical average of the work never exceeds this limit and the maximum work is delivered if the process is reversible. The mechanism of the energy transductionis also discussed.

Sasaki, K

2005-01-01T23:59:59.000Z

416

Static Analysis of the Lumped Mass Cable Model Using a Shooting Algorithm  

SciTech Connect

This paper focuses on a method to solve the static configuration for a lumped mass cable system. The method demonstrated here is intended to be used prior to performing a dynamics simulation of the cable. Conventional static analysis approaches resort to dynamics relaxation methods or root-finding algorithms (such as the Newton-Raphson method) to find the equilibrium profile. The alternative method demonstrated here is general enough for most cable configurations (slack or taut) and ranges of cable elasticity. The forces acting on the cable are attributable to elasticity, weight, buoyancy, and hydrodynamics. For the three-dimensional problem, the initial cable profile is obtained by solving three equations, regardless of the cable discretization resolution. This analysis discusses regions and circumstances under which failures in the method are encountered.

Masciola, M. D.; Nahon, M.; Driscoll, F. R.

2012-03-01T23:59:59.000Z

417

Comparing of Normal Stress Distribution in Static and Dynamic Soil-Structure Interaction Analyses  

Science Conference Proceedings (OSTI)

It is important to consider the vertical component of earthquake loading and inertia force in soil-structure interaction analyses. In most circumstances, design engineers are primarily concerned about the analysis of behavior of foundations subjected to earthquake-induced forces transmitted from the bedrock. In this research, a single rigid foundation with designated geometrical parameters located on sandy-clay soil has been modeled in FLAC software with Finite Different Method and subjected to three different vertical components of earthquake records. In these cases, it is important to evaluate effect of footing on underlying soil and to consider normal stress in soil with and without footing. The distribution of normal stress under the footing in static and dynamic states has been studied and compared. This Comparison indicated that, increasing in normal stress under the footing caused by vertical component of ground excitations, has decreased dynamic vertical settlement in comparison with static state.

Kholdebarin, Alireza; Massumi, Ali [Graduate School of Engineering, Tarbiat Moallem University of Tehran (Kharazmi), Tehran (Iran, Islamic Republic of); Davoodi, Mohammad [Dept. of Geotechnical Earthquake Engineering, International Institute of Earthquake Engineering and Seismology, IIEES, Tehran (Iran, Islamic Republic of); Tabatabaiefar, Hamid Reza

2008-07-08T23:59:59.000Z

418

Electron transfer beyond the static picture: A TDDFT/TD-ZINDO study of a pentacene dimer  

SciTech Connect

We use time-dependent density functional theory and time-dependent ZINDO (a semi-empirical method) to study transfer of an extra electron between a pair of pentacene dimers. A measure of the electronic transfer integral is computed in a dynamic picture via the vertical excitation energy from a delocalized anionic ground state. With increasing dimer separation, this dynamical measurement of charge transfer is shown to be significantly larger than the commonly used static approximation (i.e., LUMO+1 - LUMO of the neutral dimer, or HOMO - LUMO of the charged dimer), up to an order of magnitude higher at 6 . These results offer a word of caution for calculations involving large separations, as in organic photovoltaics, where care must be taken when using a static picture to model charge transfer.

Reslan, Randa; Lopata, Kenneth A.; Arntsen, Christopher D.; Govind, Niranjan; Neuhauser, Daniel

2012-12-14T23:59:59.000Z

419

Generation Maintenance Applications Center: Combined-Cycle Combustion-Turbine Static Starting System Maintenance Guide  

Science Conference Proceedings (OSTI)

This guide provides information to assist personnel involved with the maintenance of combustion-turbine static start systems, planning, predictive, and preventive maintenance techniques; failure mode information; and troubleshooting guidance.BackgroundAs the fleet of combustion turbines grows, it is critical for the starting systems to be understood and properly maintained in order to ensure the reliability of combustion-turbine generating units and the ...

2013-03-28T23:59:59.000Z

420

Relativistic and Nonrelativistic Descriptions of Electron Energy Levels in a Static Magnetic Field  

E-Print Network (OSTI)

The physical consequences of the relativistic and nonrelativistic approaches to describe the energy levels of electrons which propagate in a static homogeneous magnetic field are considered. It is shown that for a given strength of the magnetic field, the quantized energy levels of the electrons calculated by nonrelativistic and relativistic equations differ substantially, up to few orders of magnitude for a magnetic field of about 1 Tesla. Experimental verification to resolve the discrepancy would be very welcome.

H. J. Schreiber; N. B. Skachkov

2008-03-28T23:59:59.000Z

Note: This page contains sample records for the topic "test static temperature" 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

Marcy Convertible Static Compensator (CSC) Performance Analysis, Availability, and Response to System Disturbances: Technical Update  

Science Conference Proceedings (OSTI)

The development and installation of the Convertible Static Compensator (CSC) system at the New York Power Authority's (NYPA's) Marcy substation is the latest in a series of projects sponsored by EPRI's Flexible AC Transmission System (FACTS) initiative. The CSC is a power electronics-based controller that provides multiple compensating modes, which are needed to securely increase power transfer capability limits of existing transmission systems. The CSC provides flexible dynamic voltage control (to avoid...

2003-03-10T23:59:59.000Z

422

The Energy Distribution in a Static Spherically Symmetric Nonsingular Black Hole Space-Time  

E-Print Network (OSTI)

We calculate the energy distribution in a static spherically symmetric nonsingular black hole space-time by using the Tolman's energy-momentum complex. All the calculations are performed in quasi-Cartesian coordinates. The energy distribution is positive everywhere and be equal to zero at origin. We get the same result as obtained by Y-Ching Yang by using the Einstein's and Weinberg's prescriptions.

I. Radinschi

2000-08-14T23:59:59.000Z

423

Static spherically symmetric perfect fluid solutions in $f(R)$ theories of gravity  

E-Print Network (OSTI)

Static spherically symmetric perfect fluid solutions are studied in metric $f(R)$ theories of gravity. We show that pressure and density do not uniquely determine $f(R)$ ie. given a matter distribution and an equation state, one cannot determine the functional form of $f(R)$. However, we also show that matching the outside Schwarzschild-de Sitter-metric to the metric inside the mass distribution leads to additional constraints that severely limit the allowed fluid configurations.

T. Multamaki; I. Vilja

2006-12-29T23:59:59.000Z

424

In situ determination of the static inductance and resistance of a plasma focus capacitor bank  

SciTech Connect

The static (unloaded) electrical parameters of a capacitor bank are of utmost importance for the purpose of modeling the system as a whole when the capacitor bank is discharged into its dynamic electromagnetic load. Using a physical short circuit across the electromagnetic load is usually technically difficult and is unnecessary. The discharge can be operated at the highest pressure permissible in order to minimize current sheet motion, thus simulating zero dynamic load, to enable bank parameters, static inductance L{sub 0}, and resistance r{sub 0} to be obtained using lightly damped sinusoid equations given the bank capacitance C{sub 0}. However, for a plasma focus, even at the highest permissible pressure it is found that there is significant residual motion, so that the assumption of a zero dynamic load introduces unacceptable errors into the determination of the circuit parameters. To overcome this problem, the Lee model code is used to fit the computed current trace to the measured current waveform. Hence the dynamics is incorporated into the solution and the capacitor bank parameters are computed using the Lee model code, and more accurate static bank parameters are obtained.

Saw, S. H. [INTI University College, Nilai 71800 (Malaysia); Institute for Plasma Focus Studies, 32 Oakpark Drive, Chadstone, Victoria 3148 (Australia); Lee, S. [INTI University College, Nilai 71800 (Malaysia); Institute for Plasma Focus Studies, 32 Oakpark Drive, Chadstone, Victoria 3148 (Australia); National Institute of Education, Nanyang Technological University, Singapore 637616 (Singapore); Roy, F.; Chong, P. L.; Vengadeswaran, V.; Sidik, A. S. M.; Leong, Y. W.; Singh, A. [INTI University College, Nilai 71800 (Malaysia)

2010-05-15T23:59:59.000Z

425

Control of high-order harmonics for attoscience using a static-electric-field pattern  

Science Conference Proceedings (OSTI)

Quantum control in high-order-harmonic generation is considered theoretically by using a spatial distribution of static electric fields along the propagation direction of the driving field. It is shown that the trajectories of the electrons during its acceleration by the laser field in the high-harmonics-generation process can be controlled by periodically distributed static electric fields, which conveniently shape the driving laser field during propagation. Applying this mechanism, a quasi-phase-matching scheme that leads to filtered enhanced high harmonics is achieved. The harmonics in the plateau region are enhanced due to periodical phase variations in the long quantum trajectories as a consequence of the faster change experienced by the intensity-dependent phase along the longer electron trajectories. This effect should be observed in all quasi-phase-matching schemes based on perturbation of the microscopic quantum phase. The richness of adding a static-electric-field spatial pattern in the interaction region suggests a general scheme for feedback loop control in high-order-harmonic generation.

Serrat, Carles [UPC-Universitat Politecnica de Catalunya, Colom 11, E-08222 Terrassa (Barcelona) (Spain)

2011-12-15T23:59:59.000Z

426

Interaction of biological systems with static and ELF electric and magnetic fields  

Science Conference Proceedings (OSTI)

Although background levels of atmospheric electric and geomagnetic field levels are extremely low, over the past several decades, human beings and other life forms on this planet have been subjected to a dramatically changing electromagnetic milieu. An exponential increase in exposure to electromagnetic fields has occurred, largely because of such technological advances as the growth of electrical power generation and transmission systems, the increased use of wireless communications, and the use of radar. In addition, electromagnetic field generating devices have proliferated in industrial plants, office buildings, homes, public transportation systems, and elsewhere. Although significant increases have occurred in electromagnetic field strenghths spanning all frequency ranges, this symposium addresses only the impact of these fields at static and extremely low frequencies (ELF), primarily 50 and 60 Hz. This volume contains the proceedings of the symposium entitled /open quotes/Interaction of biological systems with static and ELF electric and magnetic fields/close quotes/. The purpose of the symposium was to provide a forum for discussions of all aspects of research on the interaction of static and ELF electromagnetic fields with biological systems. These systems include simple biophysical models, cell and organ preparations, whole animals, and man. Dosimetry, exposure system design, and artifacts in ELF bioeffects research were also addressed, along with current investigations that examine fundamental mechanisms of interactions between the fields and biological processes. Papers are indexed separately.

Anderson, L.E.; Kelman, B.J.; Weigel, R.J. (eds.)

1987-01-01T23:59:59.000Z

427

CDIAC Temperature Data Sets  

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

Temperature CDIAC Climate Holdings Containing Temperature Data Global Data Sets Data Set Name Investigators Data TypeFormat Period of Record NASA GISS Surface Temperature...

428

High Temperatures & Electricity Demand  

E-Print Network (OSTI)

High Temperatures & Electricity Demand An Assessment of Supply Adequacy in California Trends.......................................................................................................1 HIGH TEMPERATURES AND ELECTRICITY DEMAND.....................................................................................................................7 SECTION I: HIGH TEMPERATURES AND ELECTRICITY DEMAND ..........................9 BACKGROUND

429

Test Diversity  

E-Print Network (OSTI)

This paper describes a novel method for measuring the degree to which a set of test cases executes a given program in diverse ways with respect to the two fundamental programming concepts: control and data. Test Diversity is a method for measuring the variety of software control flow and data flow, comprising of four new measures: conditional diversity, data diversity, standard deviation of diversity, and test orthogonality. These closely-related measures could be used to evaluate the test effectiveness and the test-effort distribution of a test suite. The Diversity Analyzer is a novel industrial-strength testing tool that can currently perform diversity analysis on software written in C/C++/C#/VB in Windows and.NET environments. The Diversity Analyzer is used to evaluate the fault-detection effectiveness of Test Diversity on various types of industrial projects. Key Words: testing tools, verification, theory, experimentation, conditional diversity, data diversity, standard deviation,

Borislav Nikolik

2006-01-01T23:59:59.000Z

430

Experimental evaluation of a metal-mesh bearing damper in a high speed test rig  

E-Print Network (OSTI)

Metal mesh is a commercially available material used in many applications including seals, heat shields, filters, gaskets, aircraft engine mounts, and vibration absorbers. This material has been tested in the Turbomachinery Laboratory at Texas A&M University (TAMU) as a bearing damper in a rotordynamic test rig. The test facility was originally used to support the design of a turboprop engine at TAMU, developing squirrel cage bearing supports and squeeze film dampers for both the gas generator and power turbine rotors. To design the metal mesh damper, static stiffness and dynamic rap test measurements were first made on metal mesh samples in a specially designed non-rotating test fixture. These property tests were performed on samples of various densities and press fits. One sample was also tested in an Instron machine as an ancillary and redundant way to determine the stiffness. Using the stiffness test results and equations derived by a previous investigator, a spreadsheet program was written and used to size metal mesh donuts that have the radial stiffness value required to replace the squirrel cage in the power turbine. The squirrel cage and squeeze-film bearing damper developed for the power turbine rotor was then replaced by a metal mesh donut sized by the computer code. Coast-down tests were conducted through the first critical speed of the power turbine. The results of the metal mesh tests were compared with those obtained from previous testing with the squeeze film damper. The results show that the metal mesh damper has the same damping as the squeeze film at room temperature but does not lose its damping at elevated temperatures up to 210F?. Experiments were run under several different conditions including balanced rotor hot oil soaked, unbalanced rotor hot oil soaked, balanced dry, and unbalanced dry. Over all, metal mesh dampers appear to be a viable and attractive substitute for squeeze film dampers in gas turbine engines. The advantages shown to date include less variation of damping with temperature, ability to handle large rotor unbalance, and the ability (if required) to operate effectively in an oil free environment.

Zarzour, Mark Joseph

1999-01-01T23:59:59.000Z

431

Laboratory Studies of the Effects of Static and Variable Magnetic Fields on Freshwater Fish  

DOE Green Energy (OSTI)

There is considerable interest in the development of marine and hydrokinetic energy projects in rivers, estuaries, and coastal ocean waters of the United States. Hydrokinetic (HK) technologies convert the energy of moving water in river or tidal currents into electricity, without the impacts of dams and impoundments associated with conventional hydropower or the extraction and combustion of fossil fuels. The Federal Energy Regulatory Commission (FERC) maintains a database that displays the geographical distribution of proposed HK projects in inland and tidal waters (FERC 2012). As of March 2012, 77 preliminary permits had been issued to private developers to study HK projects in inland waters, the development of which would total over 8,000 MW. Most of these projects are proposed for the lower Mississippi River. In addition, the issuance of another 27 preliminary permits for HK projects in inland waters, and 3 preliminary permits for HK tidal projects (totaling over 3,100 MW) were under consideration by FERC. Although numerous HK designs are under development (see DOE 2009 for a description of the technologies and their potential environmental effects), the most commonly proposed projects entail arrays of rotating devices, much like submerged wind turbines, that are positioned in the high-velocity (high energy) river channels. The many diverse HK designs imply a diversity of environmental impacts, but a potential impact common to most is the effect on aquatic organisms of electromagnetic fields (EMF) created by the projects. The submerged electrical generator will emit an EMF into the surrounding water, as will underwater cables used to transmit electricity from the generator to the shore, between individual units in an array (inter-turbine cables), and between the array and a submerged step-up transformer. The electric current moving through these cables will induce magnetic fields in the immediate vicinity, which may affect the behavior or viability of fish and benthic invertebrates (Gill et al. 2005, 2009). It is known that numerous marine and freshwater organisms are sensitive to electrical and magnetic fields, often depending on them for such diverse activities as prey location and navigation (DOE 2009; Normandeau et al. 2011). Despite the wide range of aquatic organisms that are sensitive to EMF and the increasing numbers of underwater electrical transmitting cables being installed in rivers and coastal waters, little information is available to assess whether animals will be attracted, repelled, or unaffected by these new sources of EMF. This knowledge gap is especially significant for freshwater systems, where electrosensitive organisms such as paddlefish and sturgeon may interact with electrical transmission cables. We carried out a series of laboratory experiments to test the sensitivity of freshwater fish and invertebrates to the levels of EMF that are expected to be produced by HK projects in rivers. In this context, EM fields are likely to be emitted primarily by generators in the water column and by transmission cables on or buried in the substrate. The HK units will be located in areas of high-velocity waters that are used as only temporary habitats for most riverine species, so long-term exposure of fish and benthic invertebrates to EMF is unlikely. Rather, most aquatic organisms will be briefly exposed to the fields as they drift downstream or migrate upstream. Because the exposure of most aquatic organisms to EMF in a river would be relatively brief and non-lethal, we focused our investigations on detecting behavioral effects. For example, attraction to the EM fields could result in prolonged exposures to the fields or the HK rotor. On the other hand, avoidance reactions might hinder upstream migrations of fish. The experiments reported here are a continuation of studies begun in FY 2010, which focused on the potential effects of static magnetic fields on snails, clams, and fathead minnows (Cada et al. 2011). Those experiments found little indication that the behaviors of these freshwater species were a

Cada, Glenn F [ORNL; Bevelhimer, Mark S [ORNL; Fortner, Allison M [ORNL; Riemer, Kristina P [ORNL; Schweizer, Peter E [ORNL

2012-04-01T23:59:59.000Z

432

Pressure Temperature Log At Vale Hot Springs Area (Combs, Et Al., 1999) |  

Open Energy Info (EERE)

Vale Hot Springs Area (Combs, Et Al., 1999) Vale Hot Springs Area (Combs, Et Al., 1999) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Pressure Temperature Log At Vale Hot Springs Area (Combs, Et Al., 1999) Exploration Activity Details Location Vale Hot Springs Area Exploration Technique Pressure Temperature Log Activity Date Usefulness not indicated DOE-funding Unknown Notes Numerous temperature logs were taken with Sandia's platinum-resistance-thermometer (PRT) tool which along with a Sandia logging truck remained on-site for the entire project. Static temperature logs (no flow in hole) were done with this tool when coring operations were suspended for bit trips, rig maintenance, or other time intervals that would permit the hole to warm up near its static temperature K580gradient.

433

Investigation of the effect of gel residue on hydraulic fracture conductivity using dynamic fracture conductivity test  

E-Print Network (OSTI)

The key to producing gas from tight gas reservoirs is to create a long, highly conductive flow path, via the placement of a hydraulic fracture, to stimulate flow from the reservoir to the wellbore. Viscous fluid is used to transport proppant into the fracture. However, these same viscous fluids need to break to a thin fluid after the treatment is over so that the fracture fluid can be cleaned up. In shallower, lower temperature (less than 250F) reservoirs, the choice of a fracture fluid is very critical to the success of the treatment. Current hydraulic fracturing methods in unconventional tight gas reservoirs have been developed largely through ad-hoc application of low-cost water fracs, with little optimization of the process. It seems clear that some of the standard tests and models are missing some of the physics of the fracturing process in low-permeability environments. A series of the extensive laboratory "dynamic fracture conductivity" tests have been conducted. Dynamic fracture conductivity is created when proppant slurry is pumped into a hydraulic fracture in low permeability rock. Unlike conventional fracture conductivity tests in which proppant is loaded into the fracture artificially, we pump proppant/ fracturing fluid slurries into a fracture cell, dynamically placing the proppant just as it occurs in the field. Test results indicate that increasing gel concentration decreases retained fracture conductivity for a constant gas flow rate and decreasing gas flow rate decreases retained fracture conductivity. Without breaker, the damaging effect of viscous hydraulic fracturing fluids on the conductivity of proppant packs is significant at temperature of 150F. Static conductivity testing results in higher retained fracture conductivity when compared to dynamic conductivity testing.

Marpaung, Fivman

2007-12-01T23:59:59.000Z

434

Investigation of the effect of gel residue on hydraulic fracture conductivity using dynamic fracture conductivity test  

E-Print Network (OSTI)

The key to producing gas from tight gas reservoirs is to create a long, highly conductive flow path, via the placement of a hydraulic fracture, to stimulate flow from the reservoir to the wellbore. Viscous fluid is used to transport proppant into the fracture. However, these same viscous fluids need to break to a thin fluid after the treatment is over so that the fracture fluid can be cleaned up. In shallower, lower temperature (less than 250oF) reservoirs, the choice of a fracture fluid is very critical to the success of the treatment. Current hydraulic fracturing methods in unconventional tight gas reservoirs have been developed largely through ad-hoc application of low-cost water fracs, with little optimization of the process. It seems clear that some of the standard tests and models are missing some of the physics of the fracturing process in low-permeability environments. A series of the extensive laboratory dynamic fracture conductivity tests have been conducted. Dynamic fracture conductivity is created when proppant slurry is pumped into a hydraulic fracture in low permeability rock. Unlike conventional fracture conductivity tests in which proppant is loaded into the fracture artificially, we pump proppant/ fracturing fluid slurries into a fracture cell, dynamically placing the proppant just as it occurs in the field. Test results indicate that increasing gel concentration decreases retained fracture conductivity for a constant gas flow rate and decreasing gas flow rate decreases retained fracture conductivity. Without breaker, the damaging effect of viscous hydraulic fracturing fluids on the conductivity of proppant packs is significant at temperature of 150oF. Static conductivity testing results in higher retained fracture conductivity when compared to dynamic conductivity testing.

Marpaung, Fivman

2007-12-01T23:59:59.000Z

435

Field testing of component-level model-based fault detection methods for mixing boxes and VAV fan systems  

E-Print Network (OSTI)

precluded testing the fan based on design data. Since thisStatic Pressure (inWg) fan CFM SF-SP SF-SP-Design-Sim time (supply fan pressure rise) SF- DP SF-DP-Design-simulated D.

Xu, Peng; Haves, Philip

2002-01-01T23:59:59.000Z

436

Undulator Transportation Test Results  

SciTech Connect

A test was performed to determine whether transporting and handling the undulators makes any changes to their properties. This note documents the test. No significant changes to the test undulator were observed. After the LCLS undulators are tuned and fiducialized in the Magnetic Measurement Facility (MMF), they must be transported to storage buildings and transported to the tunnel. It has been established that the undulators are sensitive to temperature. We wish to know whether the undulators are also sensitive to the vibrations and shocks of transportation. To study this issue, we performed a test in which an undulator was measured in the MMF, transported to the tunnel, brought back to the MMF, and re-measured. This note documents the test and the results.

Wolf, Zachary

2010-11-17T23:59:59.000Z

437

Testing and sampling procedures for geothermal-compressured wells. Final report  

DOE Green Energy (OSTI)

Test wells to tap and sample geothermal-geopressured formations at 15,000 to 20,000 feet in the Gulf Coast area can be drilled routinely utilizing available equipment and methods. Electrical logs, surveys and fluid samplers can be used to obtain accurate and reliable information as to depths, temperatures, pressures, and fluid content of the geopressured formations before the well is completed. But it will be necessary to set casing and flow the well, at least temporarily, to secure fluid production volume and pressure data to evaluate the producibility of the geopressured resource. Electric logging and wireline survey methods are fully developed techniques for measuring the parameters needed to assess a geopressured zone before setting casing. Formation subsidence, though it may be slow to develop, can be measured during radioactivity tracer surveys. The following conclusions are drawn: existing well logging and surveying methods and equipment are generally satisfactory for testing and sampling a geothermal-geopressured resource; no significant areas of research are needed to predict, detect, and evaluate geopressured formations for their potential as geothermal resources. Static and dynamic testing procedures using existing technology are satisfactory to test, sample, and analyze a geopressured reservoir.

Boyd, W.E.

438

Towards security testing with taint analysis and genetic algorithms  

Science Conference Proceedings (OSTI)

Cross site scripting is considered the major threat to the security of web applications. Removing vulnerabilities from existing web applications is a manual expensive task that would benefit from some level of automatic assistance. Static analysis represents ... Keywords: cross site scripting, genetic algorithms, security testing, taint analysis

Andrea Avancini; Mariano Ceccato

2010-05-01T23:59:59.000Z

439

Thermal well-test method  

DOE Patents (OSTI)

A well-test method involving injection of hot (or cold) water into a groundwater aquifer, or injecting cold water into a geothermal reservoir. By making temperature measurements at various depths in one or more observation wells, certain properties of the aquifer are determined. These properties, not obtainable from conventional well test procedures, include the permeability anisotropy, and layering in the aquifer, and in-situ thermal properties. The temperature measurements at various depths are obtained from thermistors mounted in the observation wells.

Tsang, Chin-Fu (Albany, CA); Doughty, Christine A. (Berkeley, CA)

1985-01-01T23:59:59.000Z

440

Static magnetic response of clusters in Co_{0.2}Zn_{0.8}Fe_{1.95}Ho_{0.05}O_{4} spinel oxide  

E-Print Network (OSTI)

Earlier investigation of Co_{0.2}Zn_{0.8}Fe_{1.95}Ho_{0.05}O_{4} spinel has shown the existence of "super-ferromagnetic " clusters containing Fe^{3+} and Ho^{3+} ions along with small size clusters of Fe^{3+} ions (Bhowmik et al, J. Magn. Magn. Mater. {247}, 83 (2002)). Here, We report the static magnetic response of these clusters. The experimental data suggests some interesting magnetic features, such as, enhancement of magnetization; re-entrant magnetic transitions with paramagnetic to ferromagnetic state below 225 K and ferromagnetic to spin glass state below 120 K; appearance of field induced ferromagnetism. We also observe an unusual maximum in the thermoremanent magnetization (TRM) vs temperature data. Our measurements suggest that this unusuality in TRM is related to the blocking of "super-ferromagnetic" clusters ,out of the ferromagnetic state, along their local anisotropy axis.

R. N. Bhowmik; R. Ranganathan; R. Nagarajan

2003-06-25T23:59:59.000Z

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441

Molten salt test loop  

DOE Green Energy (OSTI)

The objective of the Molten Salt Test Loop Project was to design, construct, and demonstrate operation of an outdoor high temperature molten salt test facility. This facility is operational, and can now be used to evaluate materials and components, and the design features and operating procedures required for molten salt heat transport systems. The initial application of the loop was to demonstrate the feasibility of using molten salt as the heat transport medium for a high temperature distributed collector system. A commercially available eutectic salt blend is used as the heat transfer fluid. This salt has a composition of 40% NaNO/sub 2/, 7% NaNO/sub 3/, and 53% KNO/sub 3/ and is marketed under the trade name Hitec. It has a freezing (solidifying) point of 142/sup 0/C (288/sup 0/F) and has been satisfactorily used at temperatures as high as 594/sup 0/C (1100/sup 0/F). General Atomic (GA) installed a row of Fixed Mirror Solar Concentrators (FMSC's) in the loop. The system was started up and a test program conducted. Startup went smoothly, with the exception of some burned-out trace heaters. Salt temperatures as high as 571/sup 0/C (1060/sup 0/F) were achieved.

Schuster, J.R.; Eggers, G.H.

1980-01-01T23:59:59.000Z

442

Moist Static Energy Budget of MJO-like Disturbances in the Atmosphere of a Zonally Symmetric Aquaplanet  

Science Conference Proceedings (OSTI)

A MaddenJulian oscillation (MJO)-like spectral feature is observed in the timespace spectra of precipitation and column-integrated moist static energy (MSE) for a zonally symmetric aquaplanet simulated with Superparameterized Community ...

Joseph Allan Andersen; Zhiming Kuang

2012-04-01T23:59:59.000Z

443

Burgdorf Hot Springs Space Heating Low Temperature Geothermal Facility |  

Open Energy Info (EERE)

Space Heating Low Temperature Geothermal Facility Space Heating Low Temperature Geothermal Facility Facility Burgdorf Hot Springs Sector Geothermal energy Type Space Heating Location Burgdorf, Idaho Coordinates Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[]}

444

Green Canyon Hot Springs Greenhouse Low Temperature Geothermal Facility |  

Open Energy Info (EERE)

Greenhouse Low Temperature Geothermal Facility Greenhouse Low Temperature Geothermal Facility Facility Green Canyon Hot Springs Sector Geothermal energy Type Greenhouse Location Newdale, Idaho Coordinates 43.8832463°, -111.6063483° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[]}

445

Applicability of Equivalent Static Method to seismic response of piping and other components  

SciTech Connect

The Equivalent Static Method (ESM) is a simple and cost effective approach in the design of systems and components subjected to seismic loads. However, its applicability is restricted to systems which can be represented by a ``simple model.`` In this paper the restriction to a simple model is examined using the example of a propped cantilever, for which some codes or standards explicitly state that ESM is not applicable. By comparing ESM results for the propped cantilever with those for a regular (un-propped) cantilever, it is found that ESM can conditionally be applied to the propped cantilever configuration.

Hsieh, B.J.

1993-02-01T23:59:59.000Z

446

Nonlinear corrections in basic problems of electro- and magneto-statics in the vacuum  

E-Print Network (OSTI)

We find third-power nonlinear corrections to the Coulomb and other static electric fields, as well as to the electric and magnetic dipole fields, as we work within QED with no background field. The nonlinear response function we base our consideration on is the fourth-rank polarization tensor, calculated within the local (infrared) approximation of the effective action. Therefore, the results are applicable to weakly varying fields. It is established that the nonlinear correction to magnetic moment of some baryons just matches, in the order of magnitude, the existing gap between its experimental and theoretical values.

Caio V. Costa; Dmitry M. Gitman; Anatoly E. Shabad

2013-07-06T23:59:59.000Z