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Note: This page contains sample records for the topic "thermostat radiator valve" 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.


1

Nuclear radiation actuated valve  

DOE Patents (OSTI)

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

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

1985-01-01T23:59:59.000Z

2

Thermostats | Department of Energy  

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

Thermostats Thermostats Thermostats November 26, 2013 - 2:17pm Addthis A digital programmable thermostat set for energy savings during the heating season can save energy and money. | Photo courtesy of ©iStockphoto/burwellphotography A digital programmable thermostat set for energy savings during the heating season can save energy and money. | Photo courtesy of ©iStockphoto/burwellphotography You can save money on your heating and cooling bills by simply resetting your thermostat when you are asleep or away from home. You can do this automatically without sacrificing comfort by installing an automatic setback or programmable thermostat. Using a programmable thermostat, you can adjust the times you turn on the heating or air-conditioning according to a pre-set schedule. Programmable

3

Thermostats | Department of Energy  

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

Thermostats Thermostats Thermostats November 26, 2013 - 2:17pm Addthis A digital programmable thermostat set for energy savings during the heating season can save energy and money. | Photo courtesy of ©iStockphoto/burwellphotography A digital programmable thermostat set for energy savings during the heating season can save energy and money. | Photo courtesy of ©iStockphoto/burwellphotography You can save money on your heating and cooling bills by simply resetting your thermostat when you are asleep or away from home. You can do this automatically without sacrificing comfort by installing an automatic setback or programmable thermostat. Using a programmable thermostat, you can adjust the times you turn on the heating or air-conditioning according to a pre-set schedule. Programmable

4

Programmable Thermostats | Open Energy Information  

Open Energy Info (EERE)

List of Programmable Thermostats Incentives Retrieved from "http:en.openei.orgwindex.php?titleProgrammableThermostats&oldid267186" Category: Articles with outstanding TODO...

5

Field Evaluation of Programmable Thermostats  

SciTech Connect

Prior research suggests that poor programmable thermostats usability may prevent their effective use to save energy. We hypothesized that home occupants with a high-usability thermostats would be more likely to use them to save energy than people with a basic thermostat. We randomly installed a high-usability thermostat in half the 77 apartments of an affordable housing complex, installing a basic thermostat in the other half. During the heating season, we collected space temperature and furnace on-off data to evaluate occupant interaction with the thermostats, foremost nighttime setbacks. We found that thermostat usability did not influence energy-saving behaviors, finding no significant difference in temperature maintained among apartments with high- and low-usability thermostats.

Sachs, O.; Tiefenbeck, V.; Duvier, C.; Qin, A.; Cheney, K.; Akers, C.; Roth, K.

2012-12-01T23:59:59.000Z

6

Valve  

DOE Patents (OSTI)

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

Cho, Nakwon (Knoxville, TN)

1980-01-01T23:59:59.000Z

7

How people actually use thermostats  

E-Print Network (OSTI)

thermostats, such as the Honeywell Round introduced in 1953,and PTs, such as the Honeywell RTH7600 shown in Figure 1.

2010-01-01T23:59:59.000Z

8

How people actually use thermostats  

E-Print Network (OSTI)

thermostats, such as the Honeywell Round introduced in 1953,and PTs, such as the Honeywell RTH7600 shown in Figure 1.

2011-01-01T23:59:59.000Z

9

How People Actually Use Thermostats  

E-Print Network (OSTI)

thermostats, such as the Honeywell Round introduced in 1953,and PTs, such as the Honeywell RTH7600 shown in Figure 1.

Meier, Alan

2012-01-01T23:59:59.000Z

10

Thermostat Interface and Usability: A Survey  

E-Print Network (OSTI)

of Figures Figure 1: From left: a Honeywell Round thermostat, a Honeywell setback thermostat, and a controls today: Johnson and Honeywell. In 1883, Warren S.

Meier, Alan

2011-01-01T23:59:59.000Z

11

Thermostat Interface and Usability: A Survey  

E-Print Network (OSTI)

thermostats, including scheduling, control of humidity andremote control and energy use scheduling. Anticipator: This

Meier, Alan

2011-01-01T23:59:59.000Z

12

Thermostat Wars | Department of Energy  

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

Thermostat Wars Thermostat Wars Thermostat Wars August 3, 2010 - 7:30am Addthis Drew Bittner Web Manager, Office of Energy Efficiency and Renewable Energy The other day, I was visiting a friend's office and noticed something you may have noticed yourself: his building had a variety of micro-climates, ranging from the furnace hot to the freezing cold. The offices with windows that faced south and west were hottest, while offices with windows facing north and east were cooler-and the offices without windows were, on average, about as comfortable as your refrigerator. This is an artifact of building construction from the early days of air conditioning and central heating. It's "one climate fits all" thinking, which would be fine if every office had identical solar heat gain,

13

Winter Energy Savings from Lower Thermostat Settings  

Reports and Publications (EIA)

This discussion provides details on the effect of lowering thermostat settings during the winter heating months of 1997.

2000-01-01T23:59:59.000Z

14

Tips: Programmable Thermostats | Department of Energy  

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

Programmable Thermostats Programmable Thermostats Tips: Programmable Thermostats May 30, 2012 - 5:33pm Addthis Cool Summer Tip: In the summer, save money by automatically turning up the air conditioner at night or when you're away from home. Cool Summer Tip: In the summer, save money by automatically turning up the air conditioner at night or when you're away from home. Hot Winter Tip: Use a programmable thermostat to automatically turn down the heat at night or when you're away from home. Hot Winter Tip: Use a programmable thermostat to automatically turn down the heat at night or when you're away from home. Cool Summer Tip: In the summer, save money by automatically turning up the air conditioner at night or when you're away from home. Hot Winter Tip: Use a programmable thermostat to automatically turn down the heat at night or when you're away from home.

15

RESIDENTIAL THERMOSTATS: COMFORT CONTROLS IN CALIFORNIA HOMES  

SciTech Connect

This report summarizes results of a literature review, a workshop, and many meetings with demand response and thermostat researchers and implementers. The information obtained from these resources was used to identify key issues of thermostat performance from both energy savings and peak demand perspectives. A research plan was developed to address these issues and activities have already begun to pursue the research agenda.

Meier, Alan K.; Walker, Iain

2008-03-02T23:59:59.000Z

16

Residential Thermostats: Comfort Controls in California Homes  

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

Residential Thermostats: Comfort Controls in California Homes Residential Thermostats: Comfort Controls in California Homes Title Residential Thermostats: Comfort Controls in California Homes Publication Type Report LBNL Report Number LBNL-938e Year of Publication 2008 Authors Walker, Iain S., and Alan K. Meier Keywords demand response and distributed energy resources center, demand response research center, home networks & controls Abstract This report summarizes results of a literature review, a workshop, and many meetings with demand response and thermostat researchers and implementers. The information obtained from these resources was used to identify key issues of thermostat performance from both energy savings and peak demand perspectives. A research plan was developed to address these issues and activities have already begun to pursue the research agenda.

17

Program Your Thermostat for Automatic Savings | Department of Energy  

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

Program Your Thermostat for Automatic Savings Program Your Thermostat for Automatic Savings Program Your Thermostat for Automatic Savings December 23, 2008 - 4:00am Addthis Allison Casey Senior Communicator, NREL Did you know that you can save around 10% a year on your heating and cooling bills by simply turning your thermostat back 10°-15°F for eight hours? Sounds great, but I know when I'm rushing out the door, the last thing on my mind is turning down the thermostat. Luckily, programmable thermostats make it easy to save without much effort. In fact, once you get the thermostat installed and programmed to your schedule, you can stop thinking about it; your home is programmed to save. First, decide what to set your thermostat at when you are home and awake; 68°F is a good guideline in the winter. From there, program the thermostat

18

Opower Thermostat App | Open Energy Information  

Open Energy Info (EERE)

Opower Thermostat App Opower Thermostat App Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Social Opower Agency/Company /Organization: Opower Sector: Energy Focus Area: Energy Efficiency Resource Type: Software/modeling tools User Interface: Mobile Device Website: thermostat.opower.com/ Country: United States Web Application Link: thermostat.opower.com/ Cost: Free Northern America Coordinates: 38.8911837°, -77.0838797° 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":38.8911837,"lon":-77.0838797,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

19

Training Your Thermostat to Save Money... and Energy! | Department of  

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

Training Your Thermostat to Save Money... and Energy! Training Your Thermostat to Save Money... and Energy! Training Your Thermostat to Save Money... and Energy! June 25, 2012 - 6:14pm Addthis Kristin Swineford Communication Specialist, Weatherization and Intergovernmental Programs Many of us know that during the summer, temperatures aren't the only thing skyrocketing -- our energy bills usually also reach record highs due to the cooling measures required to keep ourselves, our pets, and even some of our household items comfortable. We've talked before about properly setting thermostats, especially programmable thermostats to maintain the appropriate settings while you're home, asleep or away. I've witnessed the results achieved when a regular thermostat is replaced with one that allows you to adjust the times you turn on the heating or

20

What Do You Set Your Thermostat to? | Department of Energy  

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

Set Your Thermostat to? Set Your Thermostat to? What Do You Set Your Thermostat to? June 29, 2012 - 6:29pm Addthis Earlier this week, Kristin was telling us how you can use a programmable thermostat to save money when you're not at home. This is an easy trick that's useful in the winter as well as the summer, and can always help save you some money. Why heat or cool your house when you're not there? So this week, we'd like to know: What temperature do you set your thermostat to in the summer? You have the chance to share your thoughts on a question about energy efficiency or renewable energy for consumers. E-mail your responses to the Energy Saver team at consumer.webmaster@nrel.gov. Addthis Related Articles What Are Your Top Tips for Saving Energy? At What Temperature Do You Set Your Thermostat in the Summer?

Note: This page contains sample records for the topic "thermostat radiator valve" 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

Safety valve  

DOE Patents (OSTI)

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

Bergman, Ulf C. (Malmoe, SE)

1984-01-01T23:59:59.000Z

22

List of Programmable Thermostats Incentives | Open Energy Information  

Open Energy Info (EERE)

Thermostats Incentives Thermostats Incentives Jump to: navigation, search The following contains the list of 525 Programmable Thermostats Incentives. CSV (rows 1-500) CSV (rows 501-525) Incentive Incentive Type Place Applicable Sector Eligible Technologies Active AEP Appalachian Power - Commercial and Industrial Rebate Programs (West Virginia) Utility Rebate Program West Virginia Commercial Industrial Central Air conditioners Chillers Custom/Others pending approval Heat pumps Lighting Lighting Controls/Sensors Motor VFDs Programmable Thermostats Commercial Refrigeration Equipment Ground Source Heat Pumps Yes AEP Ohio (Electric) - Residential Energy Efficiency Rebate Program (Ohio) Utility Rebate Program Ohio Residential Building Insulation Ceiling Fan Central Air conditioners

23

Program Your Thermostat for Automatic Savings | Department of...  

Office of Environmental Management (EM)

Senior Communicator, NREL Did you know that you can save around 10% a year on your heating and cooling bills by simply turning your thermostat back 10-15F for eight hours?...

24

Kansas City Power and Light- Energy Optimizer Programmable Thermostat Program  

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

Kansas City Power and Light (KCP&L) offers a free Honeywell programmable thermostat, worth $300, and free installation to qualifying customers to manage energy usage. Only residential and small...

25

Energy, Carbon-emission and Financial Savings from Thermostat Control  

SciTech Connect

Among the easiest approaches to energy, and cost, savings for most people is the adjustment of thermostats to save energy. Here we estimate savings of energy, carbon, and money in the United States of America (USA) that would result from adjusting thermostats in residential and commercial buildings by about half a degree Celsius downward during the heating season and upward during the cooling season. To obtain as small a unit as possible, and therefore the least likely to be noticeable by most people, we selected an adjustment of one degree Fahrenheit (0.56 degree Celsius) which is the gradation used almost exclusively on thermostats in the USA and is the smallest unit of temperature that has been used historically. Heating and/or cooling of interior building space for personal comfort is sometimes referred to as space conditioning, a term we will use for convenience throughout this work without consideration of humidity. Thermostat adjustment, as we use the term here, applies to thermostats that control the indoor temperature, and not to other thermostats such as those on water heaters. We track emissions of carbon only, rather than of carbon dioxide, because carbon atoms change atomic partners as they move through the carbon cycle, from atmosphere to biosphere or ocean and, on longer time scales, through the rock cycle. To convert a mass of carbon to an equivalent mass of carbon dioxide (thereby including the mass of the 2 oxygen atoms in each molecule) simply multiply by 3.67.

Blasing, T J [ORNL; Schroeder, Dana [University of Georgia, Athens, GA

2013-08-01T23:59:59.000Z

26

Check valve  

DOE Patents (OSTI)

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

Upton, H.A.; Garcia, P.

1999-08-24T23:59:59.000Z

27

Check valve  

DOE Patents (OSTI)

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

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

1999-08-24T23:59:59.000Z

28

Building America Update - July 10, 2014 | Department of Energy  

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

evaluation of thermostatically controlled radiator valves (TRVs). Presenters include: Jordan Dentz and Hugh Henderson, Advanced Residential Integrated Energy Solutions (ARIES),...

29

Fast valve  

DOE Patents (OSTI)

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

Van Dyke, W.J.

1992-04-07T23:59:59.000Z

30

Fast valve  

DOE Patents (OSTI)

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

Van Dyke, William J. (Grafton, VA)

1992-01-01T23:59:59.000Z

31

Columbia Gas of Ohio - Programmable Thermostat Rebate Program | Department  

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

Columbia Gas of Ohio - Programmable Thermostat Rebate Program Columbia Gas of Ohio - Programmable Thermostat Rebate Program Columbia Gas of Ohio - Programmable Thermostat Rebate Program < Back Eligibility Commercial Institutional Nonprofit Savings Category Heating & Cooling Commercial Heating & Cooling Heating Home Weatherization Commercial Weatherization Construction Design & Remodeling Other Sealing Your Home Ventilation Manufacturing Appliances & Electronics Water Heating Maximum Rebate $100,000/project Program Info State Ohio Program Type Utility Rebate Program Rebate Amount Energy Audit: Up to 100% Custom Conservation and Evaluation Measures: Up to 50% Research and Demonstration Measures: Up to 50% Experimental Technologies: Up to 100% Building Commissioning: Up to 50% Provider Columbia Gas of Ohio Columbia Gas of Ohio offers professional Facility/Building Energy Audits to

32

Free energy via thermostatted dynamic potential-energy changes  

Science Journals Connector (OSTI)

Three dynamical methods for computing canonical-ensemble Helmholtz free energies are discussed and compared for a thermostatted six-body harmonic chain. We use a Martyna-Klein-Tuckerman thermostat [J. Chem. Phys. 97, 2635 (1992)] with six time-reversible friction coefficients to study both single-trajectory and ensemble-averaged free-energy changes. Though all three dynamic methods produce identical long-time averages, the one based on Kirkwoods coupling-parameter theory [J. Chem. Phys. 3, 300 (1935)] converges much more rapidly than do the two based on time-integrated heat transfer.

Brad Lee Holian; H. A. Posch; W. G. Hoover

1993-06-01T23:59:59.000Z

33

Depressurization valve  

DOE Patents (OSTI)

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

Skoda, G.I.

1989-03-28T23:59:59.000Z

34

Program Your Thermostat for Fall and Winter Savings | Department of Energy  

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

Program Your Thermostat for Fall and Winter Savings Program Your Thermostat for Fall and Winter Savings Program Your Thermostat for Fall and Winter Savings October 9, 2012 - 4:17pm Q&A At what temperature do you set your thermostat to save energy and money when it's cold outside? Tell Us Addthis Use a programmable thermostat to automatically turn down the heat at night or when you're away from home. Use a programmable thermostat to automatically turn down the heat at night or when you're away from home. Allison Casey Senior Communicator, NREL What does this mean for me? Save 5% to 15% a year on your heating bill by setting your thermostat back 10° to 15° for 8 hours at a time. It's been a beautiful fall here in Colorado; 70 and 80 degree days and comfortably cool nights have spoiled us. We haven't had to turn on the heat

35

At What Temperature Do You Set Your Thermostat in the Summer? | Department  

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

At What Temperature Do You Set Your Thermostat in the Summer? At What Temperature Do You Set Your Thermostat in the Summer? At What Temperature Do You Set Your Thermostat in the Summer? June 25, 2009 - 5:00am Addthis You can save 5%-15% on your cooling bills by raising the temperature setting on your thermostat when you are away and don't need cooling. Only lower the setting to 78°F when you are home and need cooling. A programmable thermostat can make it easy to adjust the temperature on a regular schedule. At what temperature do you set your thermostat when you are home and awake in the summer? How about when you're asleep or away? Each Thursday, you have the chance to share your thoughts on a topic related to energy efficiency or renewable energy for consumers. Please comment with your answers, and also feel free to respond to other comments.

36

Ener-Gee Whiz Answers Your Questions: Thermostat Settings and Solar Water  

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

Ener-Gee Whiz Answers Your Questions: Thermostat Settings and Solar Ener-Gee Whiz Answers Your Questions: Thermostat Settings and Solar Water Heaters Ener-Gee Whiz Answers Your Questions: Thermostat Settings and Solar Water Heaters June 23, 2009 - 12:54pm Addthis Amy Foster Parish Ener-Gee Whiz would like to offer a hearty thanks to all of you who've written in for your great efficiency and renewables related questions. Now, on to some answers! Patti writes: Is it efficient to raise the thermostat in a business when the business is closed during air conditioning season? Ener-Gee Whiz: Your business might be able to save energy-and money-by turning your thermostat up during the cooling season. But how much energy and money you save are largely dependent on how much you set your thermostat back and for how long. The Energy Savers website suggests that

37

Ad hoc continuum-atomistic thermostat for modeling heat flow in molecular dynamics simulations  

E-Print Network (OSTI)

Ad hoc continuum-atomistic thermostat for modeling heat flow in molecular dynamics simulations J 2004) An ad hoc thermostating procedure that couples a molecular dynamics (MD) simulation

Brenner, Donald W.

38

Steam Turbine Control Valve Noise  

Science Journals Connector (OSTI)

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

Frank J. Heymann; Michael A. Staiano

1973-01-01T23:59:59.000Z

39

Artificial Heart Valve Design  

E-Print Network (OSTI)

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

Provancher, William

40

Thinking of Your Thermostat for Savings This Winter | Department of Energy  

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

Thinking of Your Thermostat for Savings This Winter Thinking of Your Thermostat for Savings This Winter Thinking of Your Thermostat for Savings This Winter February 28, 2012 - 2:48pm Addthis Amanda McAlpin This has certainly been an unusual winter for most of the country. Warmer temperatures and minimal snowfall totals have many hoping for an early spring. February on the east coast has been like a roller coaster ride, with temperatures plunging one day, then warm enough the next to skip the coat. In my home, I've spent the month trying to predict the ups and downs of the weather by adjusting my heater constantly. It's tempting to leave the thermostat on at a set temperature, so that the room is warm when returning home. Many assume this saves energy, because the heater won't have to work as hard to heat the room to the desired

Note: This page contains sample records for the topic "thermostat radiator valve" 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

Remote actuated valve implant  

SciTech Connect

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

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

2014-02-25T23:59:59.000Z

42

Bellows sealed plug valve  

DOE Patents (OSTI)

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

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

1990-01-01T23:59:59.000Z

43

Building America Webinar: Retrofitting Central Space Conditioning...  

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

strategies and the evaluation of thermostatically controlled radiator valves (TRVs). Jordan Dentz and Hugh Henderson, Advanced Residential Integrated Energy Solutions (ARIES),...

44

Building America Webinar: Retrofitting Central Space Conditioning Strategies for Multifamily Buildings  

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

The webinar focused on improving the performance of central space conditioning systems in multifamily buildings, including hydronic heating strategies and the evaluation of thermostatically controlled radiator valves (TRVs).

45

Valves: Corrosion and maintenance  

SciTech Connect

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

Meadows, D.G.

1993-08-01T23:59:59.000Z

46

Question of the Week: At What Temperature Do You Set Your Thermostat in the  

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

Question of the Week: At What Temperature Do You Set Your Question of the Week: At What Temperature Do You Set Your Thermostat in the Winter? Question of the Week: At What Temperature Do You Set Your Thermostat in the Winter? December 11, 2008 - 8:45am Addthis Did you know that you can save energy in the winter by setting the thermostat to 68°F while you're awake and setting it lower while you're asleep or away from home? By turning your thermostat back 10°-15° for 8 hours, you can save about 5%-15% a year on your heating bill-a savings of as much as 1% for each degree if the setback period is eight hours long. At what temperature do you set your thermostat when you are home and awake in the winter? How about when you're asleep or away? E-mail your responses to the Energy Saver team at consumer.webmaster@nrel.gov.

47

Overflow control valve  

DOE Patents (OSTI)

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

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

1984-07-24T23:59:59.000Z

48

Getting Ready to Set the Thermostat Low-And Keep it There! | Department  

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

to Set the Thermostat Low-And Keep it There! to Set the Thermostat Low-And Keep it There! Getting Ready to Set the Thermostat Low-And Keep it There! October 26, 2011 - 6:48am Addthis Elizabeth Spencer Communicator, National Renewable Energy Laboratory Every year I try to convince myself that I am going to turn my thermostat down for the entire winter. It's going to be 68 degrees or lower, I tell myself. I'm not going to turn it up for any reason. I might even be daring and try to get a few degrees lower! It'll be awesome! It usually doesn't end well. You see, I'm a gigantic wuss about the cold. Something always happens-it takes me 4 hours to drive home in the snow, I have a lousy day, or it drops beneath zero degrees Fahrenheit-and suddenly I want to treat myself to a balmy 70 degrees to make up for it.

49

Reduced-Order Modeling of Aggregated Thermostatic Loads With Demand Response  

E-Print Network (OSTI)

Reduced-Order Modeling of Aggregated Thermostatic Loads With Demand Response Wei Zhang, Jianming Lian, Chin-Yao Chang, Karanjit Kalsi and Yannan Sun Abstract-- Demand Response is playing population of appliances under demand response is especially important to evaluate the effec- tiveness

Zhang, Wei

50

Quantifying flexibility of residential thermostatically controlled loads for demand response: a data-driven approach  

Science Journals Connector (OSTI)

Power systems are undergoing a paradigm shift due to the influx of variable renewable generation to the supply side. The resulting increased uncertainty has system operators looking to new resources, enabled by smart grid technologies, on the demand ... Keywords: demand response, inverse building model, load shedding, thermostatically controlled loads

Emre Can Kara; Michaelangelo D. Tabone; Jason S. MacDonald; Duncan S. Callaway; Sila Kiliccote

2014-11-01T23:59:59.000Z

51

The Smart Thermostat: Using Occupancy Sensors to Save Energy in Homes  

E-Print Network (OSTI)

.8% energy on average, and actually increases energy consumption in 4 of the 8 households. Categories higher energy consumption on average than those with manual con- trols because users program themThe Smart Thermostat: Using Occupancy Sensors to Save Energy in Homes Jiakang Lu, Tamim Sookoor

Whitehouse, Kamin

52

The Self-Programming Thermostat: Optimizing Setback Schedules based on Home Occupancy Patterns  

E-Print Network (OSTI)

Keywords Building Energy, Home Monitoring, Programmable Ther- mostats, Wireless Sensor Networks 1, accounting for 43% of all residential energy usage [8]. Programmable thermostats can substantially reduce this energy usage with a setback schedule that relaxes temperature setpoints at certain times of the day

Whitehouse, Kamin

53

From the Optimizing Thermostat to a Smart Energy Management System: Models,  

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

From the Optimizing Thermostat to a Smart Energy Management System: Models, From the Optimizing Thermostat to a Smart Energy Management System: Models, Benchmark, and Insights Speaker(s): Yong Liang Date: May 1, 2012 - 12:00pm Location: 90-3122 Seminar Host/Point of Contact: Janie Page Nowadays, users in the retail electricity market only need to pay a fixed rate for electricity. This strategy results in lack of coordination between demand and supply and costs significant waste. A shift from fixed rate pricing in retail markets could potentially yield many benefits. Time-varying pricing promotes the substitution of off-peak consumption for peak consumption, reducing strain on the electrical system, the need for costly and inefficient "peaker" plants, and waste in electricity delivery. However, existing research supports what common sense suggests:

54

Flow metering valve  

DOE Patents (OSTI)

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

Blaedel, Kenneth L. (Dublin, CA)

1985-01-01T23:59:59.000Z

55

Flow metering valve  

DOE Patents (OSTI)

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

Blaedel, K.L.

1983-11-03T23:59:59.000Z

56

Mud saver valve  

SciTech Connect

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

Baugh, B.F.

1990-02-13T23:59:59.000Z

57

Classification of heart valve condition using acoustic measurements  

SciTech Connect

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

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

1994-11-15T23:59:59.000Z

58

Fast closing valve  

DOE Patents (OSTI)

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

Hanson, Clark L. (Livermore, CA)

1984-01-10T23:59:59.000Z

59

Development and Validation of Aggregated Models for Thermostatic Controlled Loads with Demand Response  

SciTech Connect

Demand response is playing an increasingly important role in smart grid research and technologies being examined in recently undertaken demonstration projects. The behavior of load as it is affected by various load control strategies is important to understanding the degree to which different classes of end-use load can contribute to demand response programs at various times. This paper focuses on developing aggregated control models for a population of thermostatically controlled loads. The effects of demand response on the load population dynamics are investigated.

Kalsi, Karanjit; Elizondo, Marcelo A.; Fuller, Jason C.; Lu, Shuai; Chassin, David P.

2012-01-04T23:59:59.000Z

60

Self-regulating valve  

DOE Patents (OSTI)

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

Humphreys, D.A.

1982-07-20T23:59:59.000Z

Note: This page contains sample records for the topic "thermostat radiator valve" 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

Valve stem and packing assembly  

DOE Patents (OSTI)

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

Wordin, J.J.

1991-09-03T23:59:59.000Z

62

Valve stem and packing assembly  

DOE Patents (OSTI)

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

Wordin, John J. (Bingham County, ID)

1991-01-01T23:59:59.000Z

63

Valve for gas centrifuges  

DOE Patents (OSTI)

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

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

1982-03-17T23:59:59.000Z

64

Experimental analysis of a direct expansion solar assisted heat pump with integral storage tank for domestic water heating under zero solar radiation conditions  

Science Journals Connector (OSTI)

This paper deals with the experimental evaluation of the performance of a direct expansion solar assisted heat pump water heating (DX-SAHPWH) system working under zero solar radiation conditions at static heating operation mode of the storage tank. The DX-SAHPWH system includes two bare solar collectors as evaporator, a \\{R134a\\} rotary-type hermetic compressor, a thermostatic expansion valve and a helical coil condenser immersed in a 300L water storage tank. The zero solar radiation and stable ambient air temperature working conditions were established by placing the solar collectors into a climate chamber. The analysis is based on experimental data taken from the DX-SAHPWH provided by the manufacturer and equipped with an appropriate data acquisition system. In the paper, the experimental facility, the data acquisition system and the experimental methodology are described. Performance parameters to evaluate the energy efficiency, such as COP and equivalent seasonal performance factors (SPFe) for the heating period, and the water thermal stratification in the storage tank are defined and obtained from the experimental data. Results from the experimental analysis under transient operating working conditions of the DX-SAHPWH system and its main components are shown and discussed. Lastly, the Huang and Lee DX-SAHPWH performance evaluation method was applied resulting in a characteristic COP of 3.23 for the DX-SAHPWH system evaluated under zero solar radiation condition.

Jos Fernndez-Seara; Carolina Pieiro; J. Alberto Dopazo; F. Fernandes; Paulo X.B. Sousa

2012-01-01T23:59:59.000Z

65

Fast-acting valve and uses thereof  

DOE Patents (OSTI)

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

Meyer, James A. (Espanola, NM)

1982-01-01T23:59:59.000Z

66

Fast-acting valve and uses thereof  

DOE Patents (OSTI)

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

Meyer, J.A.

1980-05-16T23:59:59.000Z

67

Small Business Demand Response with Communicating Thermostats: SMUD's Summer Solutions Research Pilot  

SciTech Connect

This report documents a field study of 78 small commercial customers in the Sacramento Municipal Utility District service territory who volunteered for an integrated energy-efficiency/demand-response (EE-DR) program in the summer of 2008. The original objective for the pilot was to provide a better understanding of demand response issues in the small commercial sector. Early findings justified a focus on offering small businesses (1) help with the energy efficiency of their buildings in exchange for occasional load shed, and (2) a portfolio of options to meet the needs of a diverse customer sector. To meet these expressed needs, the research pilot provided on-site energy efficiency advice and offered participants several program options, including the choice of either a dynamic rate or monthly payment for air-conditioning setpoint control. An analysis of hourly load data indicates that the offices and retail stores in our sample provided significant demand response, while the restaurants did not. Thermostat data provides further evidence that restaurants attempted to precool and reduce AC service during event hours, but were unable to because their air-conditioning units were undersized. On a 100 F reference day, load impacts of all participants during events averaged 14%, while load impacts of office and retail buildings (excluding restaurants) reached 20%. Overall, pilot participants including restaurants had 2007-2008 summer energy savings of 20% and bill savings of 30%. About 80% of participants said that the program met or surpassed their expectations, and three-quarters said they would probably or definitely participate again without the $120 participation incentive. These results provide evidence that energy efficiency programs, dynamic rates and load control programs can be used concurrently and effectively in the small business sector, and that communicating thermostats are a reliable tool for providing air-conditioning load shed and enhancing the ability of customers on dynamic rates to respond to intermittent price events.

Herter, Karen; Wayland, Seth; Rasin, Josh

2009-09-25T23:59:59.000Z

68

Bad seeds sprout perilous dynamics: stochastic thermostat induced trajectory synchronization in biomolecules  

SciTech Connect

Molecular dynamics simulations starting from different initial conditions are commonly used to mimic the behavior of an experimental ensemble. We show in this article that when a Langevin thermostat is used to maintain constant temperature during such simulations, extreme care must be taken when choosing the random number seeds used in order to prevent statistical correlation among the MD trajectories. While recent studies have shown that stochastically thermostatted trajectories evolving within a single potential basin with identical random number seeds tend to synchronize, we show that there is a synchronization effect even for complex, biologically relevant systems. We demonstrate this effect in simulations of Alanine trimer and pentamer and in a simulation of a temperature-jump experiment for peptide folding of a 14-residue peptide. Even in replica-exchange simulations, in which the trajectories are at different temperatures, we find partial synchronization occurring when the same random number seed is employed. We explain this by extending the recent derivation of the synchronization effect for two trajectories in a harmonic well to the case in which the trajectories are at two different temperatures. Our results suggest several ways in which mishandling selection of a pseudo random number generator initial seed can lead to corruption of simulation data. Simulators can fall into this trap in simple situations such as neglecting to specifically indicate different random seeds in either parallel or sequential restart simulations, utilizing a simulation package with a weak pseudorandom number generator, or using an advanced simulation algorithm that hasn't been programmed to distribute initial seeds.

Voter, A F [Los Alamos National Laboratory; Sindhikara, Daniel J [UNIV OF FLORIDA; Kim, Seonah [UNIV OF CALIFORNIA; Roitberg, Adrian E [UNIV OF FLORIDA

2009-01-01T23:59:59.000Z

69

Semi-active compressor valve  

DOE Patents (OSTI)

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

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

2010-07-27T23:59:59.000Z

70

Internal combustion engine intake valve  

SciTech Connect

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

Mosler, W.B.

1988-10-25T23:59:59.000Z

71

Redesigned recycle valves abate compressor vibration  

SciTech Connect

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

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

1995-06-05T23:59:59.000Z

72

Surge-damping vacuum valve  

DOE Patents (OSTI)

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

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

1980-01-01T23:59:59.000Z

73

Building America Webinar: Retrofitting Central Space Conditioning Strategies for Multifamily Buildings  

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

This webinar will focus on improving the performance of central space conditioning systems in multifamily buildings. Presenters will discuss hydronic heating strategies and the evaluation of thermostatically controlled radiator valves (TRVs).

74

Control valve for solar heating systems  

SciTech Connect

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

Stewart, J.M.

1981-12-29T23:59:59.000Z

75

Annular flow control safety valve  

SciTech Connect

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

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

1981-06-16T23:59:59.000Z

76

Cavitation guide for control valves  

SciTech Connect

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

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

1993-04-01T23:59:59.000Z

77

Valve for controlling solids flow  

DOE Patents (OSTI)

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

Feldman, David K. (Fairlawn, NJ)

1980-01-01T23:59:59.000Z

78

Heart valve tissue engineering Frank Baaijens  

E-Print Network (OSTI)

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

Stavroulakis, Georgios E.

79

Heart Valve Lesson Plan Biomedical Engineering  

E-Print Network (OSTI)

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

Provancher, William

80

Reduced-Order Modeling of Aggregated Thermostatic Loads With Demand Response  

SciTech Connect

Demand Response is playing an increasingly important role in smart grid control strategies. Modeling the behavior of populations of appliances under demand response is especially important to evaluate the effectiveness of these demand response programs. In this paper, an aggregated model is proposed for a class of Thermostatically Controlled Loads (TCLs). The model efficiently includes statistical information of the population, systematically deals with heterogeneity, and accounts for a second-order effect necessary to accurately capture the transient dynamics in the collective response. However, an accurate characterization of the collective dynamics however requires the aggregate model to have a high state space dimension. Most of the existing model reduction techniques require the stability of the underlying system which does not hold for the proposed aggregated model. In this work, a novel model reduction approach is developed for the proposed aggregated model, which can significantly reduce its complexity with small performance loss. The original and the reducedorder aggregated models are validated against simulations of thousands of detailed building models using GridLAB-D, which is a realistic open source distribution simulation software. Index Terms demand response, aggregated model, ancillary

Zhang, Wei; Lian, Jianming; Chang, Chin-Yao; Kalsi, Karanjit; Sun, Yannan

2012-12-12T23:59:59.000Z

Note: This page contains sample records for the topic "thermostat radiator valve" 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

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

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

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

82

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

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

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

83

Noninvasive valve monitor using alternating electromagnetic field  

DOE Patents (OSTI)

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

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

1993-01-01T23:59:59.000Z

84

Annular flow diverter valve  

DOE Patents (OSTI)

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

Rider, Robert L. (Walkersville, MD)

1980-01-01T23:59:59.000Z

85

An electromechanical valve drive incorporating a nonlinear mechanical transformer  

E-Print Network (OSTI)

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

Chang, Woo Sok, 1964-

2003-01-01T23:59:59.000Z

86

Active combustion flow modulation valve  

DOE Patents (OSTI)

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

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

2013-09-24T23:59:59.000Z

87

American Valve: Order (2010-CW-1411)  

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

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

88

Self Contained Temperature Actuated Control Valves  

E-Print Network (OSTI)

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

Pirkle, F.

1979-01-01T23:59:59.000Z

89

Lockout housing and sleeve for safety valve  

SciTech Connect

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

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

1992-07-07T23:59:59.000Z

90

Fast-acting valve actuator  

DOE Patents (OSTI)

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

Cho, Nakwon (Knoxville, TN)

1980-01-01T23:59:59.000Z

91

CONTROL VALVE TESTING PROCEDURES AND EQUATIONS  

E-Print Network (OSTI)

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

Rahmeyer, William J.

92

Dynamic Testing of Check Valves William Rahmeyer  

E-Print Network (OSTI)

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

Rahmeyer, William J.

93

Valve for fuel pin loading system  

DOE Patents (OSTI)

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

Christiansen, D.W.

1984-01-01T23:59:59.000Z

94

Valve for fuel pin loading system  

DOE Patents (OSTI)

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

Christiansen, David W. (Kennewick, WA)

1985-01-01T23:59:59.000Z

95

Sizing sliding gate valves for steam service  

SciTech Connect

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

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

1995-11-06T23:59:59.000Z

96

Evaluation of silicon-nitride ceramic valves.  

SciTech Connect

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

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

2008-01-01T23:59:59.000Z

97

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

DOE Patents (OSTI)

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

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

2012-04-17T23:59:59.000Z

98

Improved valve and dash-pot assembly  

DOE Patents (OSTI)

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

Chang, S.C.

1985-04-23T23:59:59.000Z

99

Michigan: General Motors Optimizes Engine Valve Technology  

Office of Energy Efficiency and Renewable Energy (EERE)

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

100

Install Removable Insulation on Valves and Fittings  

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

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

Note: This page contains sample records for the topic "thermostat radiator valve" 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

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

Energy Savers (EERE)

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

102

Key valves prioritization study. Final report  

SciTech Connect

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

Riddington, J.W.

1984-10-01T23:59:59.000Z

103

D0 Silicon Upgrade: Control Dewar Valve Calculations  

SciTech Connect

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

Rucinski, Russ; /Fermilab

1995-10-20T23:59:59.000Z

104

Cylinder valve packing nut studies  

SciTech Connect

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

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

1991-12-31T23:59:59.000Z

105

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

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

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

106

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

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

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

107

Characterization of the mitral valve using accelerated wear testing.  

E-Print Network (OSTI)

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

Riggan, Courtney N.

2010-01-01T23:59:59.000Z

108

High speed exhaust gas recirculation valve  

DOE Patents (OSTI)

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

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

2005-01-18T23:59:59.000Z

109

Vertical pump with free floating check valve  

DOE Patents (OSTI)

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

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

1980-01-01T23:59:59.000Z

110

Minimizing energy losses in control valves  

SciTech Connect

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

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

1994-08-01T23:59:59.000Z

111

Whitey SCHe Ball Valves Provide Test Port Isolation  

SciTech Connect

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

MISKA, C.R.

2000-09-15T23:59:59.000Z

112

Whitey SCHe Ball Valves Provide Test Port Isolation  

SciTech Connect

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

MISKA, C.R.

2000-10-19T23:59:59.000Z

113

Pressure compensated flow control valve  

DOE Patents (OSTI)

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

Minteer, Daniel J. (West Richland, WA)

1999-01-01T23:59:59.000Z

114

Processing of prosthetic heart valve sounds for single leg separation classification  

SciTech Connect

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

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

1995-06-01T23:59:59.000Z

115

Torque-Actuated Valves for Microfluidics  

Science Journals Connector (OSTI)

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

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

2005-06-15T23:59:59.000Z

116

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

DOE Patents (OSTI)

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

Casada, D.A.

1996-01-16T23:59:59.000Z

117

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

DOE Patents (OSTI)

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

Sun, Zongxuan (Plymouth, MN)

2011-01-11T23:59:59.000Z

118

The safety valve and climate policy  

E-Print Network (OSTI)

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

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

119

Project Development Specification for Valve Pit Manifold  

SciTech Connect

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

MCGREW, D.L.

2000-09-28T23:59:59.000Z

120

Well injection valve with retractable choke  

SciTech Connect

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

Pringle, R.E.

1986-07-22T23:59:59.000Z

Note: This page contains sample records for the topic "thermostat radiator valve" 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

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

SciTech Connect

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

Wells, Beric E.

2012-12-21T23:59:59.000Z

122

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

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

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

123

Novel design of a rotary valve using axiomatic design  

E-Print Network (OSTI)

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

Peliks, Robert Bilgor

2005-01-01T23:59:59.000Z

124

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

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

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

125

The pipeline and valve location problem  

Science Journals Connector (OSTI)

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

Gilbert Laporte; Marta M.B. Pascoal

2012-01-01T23:59:59.000Z

126

Modeling Cylinder Valve in Hydrogen Fuel Cell Car  

Science Journals Connector (OSTI)

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

Liang Yu; Shengnian Cai; Wang Na

2011-03-01T23:59:59.000Z

127

Design for Control System of Wastegate Valve Actuator in Turbocharger  

Science Journals Connector (OSTI)

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

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

2010-12-01T23:59:59.000Z

128

Heart Valve Disease James S. Gammie, MD  

E-Print Network (OSTI)

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

Weber, David J.

129

New safety valve addresses environmental concerns  

SciTech Connect

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

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

1992-10-01T23:59:59.000Z

130

Microfluidic Cell Electroporation Using a Mechanical Valve  

E-Print Network (OSTI)

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

Lu, Chang

131

Disc valve for sampling erosive process streams  

DOE Patents (OSTI)

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

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

1984-08-16T23:59:59.000Z

132

SpecialBulletin page 1California Energ y Commission March 2006 no. 84  

E-Print Network (OSTI)

and either third-party field-verified thermostatic expansion valves or refrigerant charge measurement and refrigerant charge measurement or thermostatic expansion valves (such as Table 8-3 of the Residential

133

Valve supporting arrangement of an internal combustion engine  

SciTech Connect

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

Hayashi, Y.

1986-05-27T23:59:59.000Z

134

Statistical Performance Evaluation Of Soft Seat Pressure Relief Valves  

SciTech Connect

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

Harris, Stephen P.; Gross, Robert E.

2013-03-26T23:59:59.000Z

135

Technical evaluation: 300 Area steam line valve accident  

SciTech Connect

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

Not Available

1993-08-01T23:59:59.000Z

136

Curved butterfly bileaflet prosthetic cardiac valve  

DOE Patents (OSTI)

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

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

1991-06-25T23:59:59.000Z

137

Are subsurface safety valves needed in deepwater?  

SciTech Connect

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

Verret, A.; Hey, C.

1995-11-01T23:59:59.000Z

138

Water cooling of HVDC thyristor valves  

SciTech Connect

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

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

1994-10-01T23:59:59.000Z

139

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

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

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

140

Diagnostic for two-mode variable valve activation device  

DOE Patents (OSTI)

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

Fedewa, Andrew M

2014-01-07T23:59:59.000Z

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


141

Novel 4-Way Refrigerant Reversing Valve for Heat Pumps  

SciTech Connect

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

Darin W. Nutter

2000-02-17T23:59:59.000Z

142

Subsurface safety valve with lock-open system  

SciTech Connect

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

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

1986-11-25T23:59:59.000Z

143

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

E-Print Network (OSTI)

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

Marchese, Andrew Dominic

144

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

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

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

145

Second Peer Review for New MGI Valves for NSTX-U  

E-Print Network (OSTI)

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

Princeton Plasma Physics Laboratory

146

Corrosion in HVDC valve cooling systems  

SciTech Connect

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

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

1997-04-01T23:59:59.000Z

147

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

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

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

148

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

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

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

149

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

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

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

150

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

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

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

151

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

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

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

152

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

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

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

153

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

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

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

154

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

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

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

155

Reducing pressure loss of large diameter check valves  

SciTech Connect

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

NONE

1997-09-01T23:59:59.000Z

156

Processing of prosthetic heart valve sounds for classification. Revision 1  

SciTech Connect

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

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

1994-04-01T23:59:59.000Z

157

Processing of Prosthetic Heart Valve Sounds from Anechoic Tank Measurements  

SciTech Connect

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

Candy, J V; Meyer, A W

2001-03-20T23:59:59.000Z

158

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

E-Print Network (OSTI)

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

Petta, Jason

159

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

DOE Patents (OSTI)

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

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

1993-08-17T23:59:59.000Z

160

Nonlinear springs with applications to flow regulation valves and mechanisms  

E-Print Network (OSTI)

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

Freeman, David Calvin

2008-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "thermostat radiator valve" 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

Friction and Wear Reduction in Diesel Engine Valve Trains  

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

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

162

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

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

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

163

Production-Intent Lost-Motion Variable Valve Actuation Systems  

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

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

164

Spin-valve photodiode Ian Appelbaum,a)  

E-Print Network (OSTI)

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

Russell, Kasey

165

Thermal runaway of valve-regulated lead-acid batteries  

Science Journals Connector (OSTI)

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

Junmei Hu; Yonglang Guo; Xuechou Zhou

2006-10-01T23:59:59.000Z

166

Investigation of valve plate in water hydraulic axial piston motor  

Science Journals Connector (OSTI)

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

Song-Lin Nie Ph.D; Zhuang-Yun Li

2002-03-01T23:59:59.000Z

167

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

E-Print Network (OSTI)

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

Karp, Larry S.

168

Electric actuation of a surface controlled subsea safety valve  

E-Print Network (OSTI)

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

Bartlett, Timothy Joseph

2013-02-22T23:59:59.000Z

169

Energy Savings Potential of Process Control Valve Replacement  

E-Print Network (OSTI)

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

Holzenthal, L. Jr.

170

Signal processing of Shiley heart valve data for fracture detection  

SciTech Connect

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

Mullenhoff, C.

1993-04-01T23:59:59.000Z

171

Signal processing of Shiley heart valve data for fracture detection  

SciTech Connect

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

Mullenhoff, C.

1993-09-01T23:59:59.000Z

172

Sizing safety valve vent pipes for saturated steam  

SciTech Connect

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

Brandmaier, H.E.

1982-01-01T23:59:59.000Z

173

Valving for controlling a fluid-driven reciprocating apparatus  

DOE Patents (OSTI)

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

Whitehead, John C. (Davis, CA)

1995-01-01T23:59:59.000Z

174

Valving for controlling a fluid-driven reciprocating apparatus  

DOE Patents (OSTI)

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

Whitehead, J.C.

1995-06-27T23:59:59.000Z

175

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

SciTech Connect

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

NONE

1996-07-01T23:59:59.000Z

176

Engine including hydraulically actuated valvetrain and method of valve overlap control  

DOE Patents (OSTI)

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

Cowgill, Joel (White Lake, MI)

2012-05-08T23:59:59.000Z

177

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

DOE Patents (OSTI)

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

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

2014-09-23T23:59:59.000Z

178

Classification of prosthetic heart valve sounds. A parametric approach  

SciTech Connect

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

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

1995-06-01T23:59:59.000Z

179

Measuring while drilling apparatus mud pressure signal valve  

SciTech Connect

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

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

1986-12-09T23:59:59.000Z

180

Drive piston assembly for a valve actuator assembly  

DOE Patents (OSTI)

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

Sun, Zongxuan (Troy, MI)

2010-02-23T23:59:59.000Z

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


181

How People Actually Use Thermostats  

E-Print Network (OSTI)

systems. Applied Ergonomics, 40(2), 165-174. Shipworth, M. ,and sensations. Applied Ergonomics, 12(1), 29-33. Boait, P.timer/programmer. Applied Ergonomics, 13(1), 15-23. Nelson,

Meier, Alan

2012-01-01T23:59:59.000Z

182

How people actually use thermostats  

E-Print Network (OSTI)

Heating Systems. Applied Ergonomics, 40(2), 165- Shipworth,and Sensations. Applied Ergonomics, 12(1), 29-33. Boait, P.Timer/Programmer. Applied Ergonomics, 13(1), 15-23. Nelson,

2011-01-01T23:59:59.000Z

183

How people actually use thermostats  

E-Print Network (OSTI)

Heating Systems. Applied Ergonomics, 40(2), 165- Shipworth,and Sensations. Applied Ergonomics, 12(1), 29-33. Boait, P.Timer/Programmer. Applied Ergonomics, 13(1), 15-23. Nelson,

2010-01-01T23:59:59.000Z

184

Smart Thermostats in Residential Applications  

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

Resources News & Events Expand News & Events Skip navigation links Smart Grid Demand Response Energy Efficiency Emerging Technologies Current Research Portfolio Behavior Based...

185

How People Actually Use Thermostats  

E-Print Network (OSTI)

2006 ACEEE Summer Study on Energy Efficiency in Buildings.Study on Energy Efficiency in Buildings, 8.233-238.244.Summer Study on Energy Efficiency in Buildings. Diamond, R.

Meier, Alan

2012-01-01T23:59:59.000Z

186

How people actually use thermostats  

E-Print Network (OSTI)

Summer Study on Energy Efficiency in Buildings, 2, 91-100.Study on Energy Efficiency in Buildings, 8.233-238.244.Summer Study on Energy Efficiency in Buildings Parker, D.

2010-01-01T23:59:59.000Z

187

How people actually use thermostats  

E-Print Network (OSTI)

2006 ACEEE Summer Study on Energy Efficiency in Buildings.Summer Study on Energy Efficiency in Buildings https://Summer Study on Energy Efficiency in Buildings https://

2011-01-01T23:59:59.000Z

188

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

Science Journals Connector (OSTI)

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

Guoming G. Zhu; Jia Ma; Harold Schock

2009-06-01T23:59:59.000Z

189

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

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

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

190

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

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

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

191

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

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

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

192

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

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

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

193

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

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

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

194

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

Science Journals Connector (OSTI)

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

Bernard Cosyns; Guy van Camp; Alain Friart

1995-03-01T23:59:59.000Z

195

Development and introduction of wire for engine valve springs in VAZ  

Science Journals Connector (OSTI)

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

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

1996-11-01T23:59:59.000Z

196

Water Consumption from Freeze Protection Valves for Solar Water Heating Systems  

SciTech Connect

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

Burch, J.; Salasovich, J.

2005-12-01T23:59:59.000Z

197

Piping retrofit reduces valve-damaging flow vibration  

SciTech Connect

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

Webb, M.; Ellenberger, P.

1995-01-01T23:59:59.000Z

198

Investigation of valve failure problems in LWR power plants  

SciTech Connect

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

None

1980-04-01T23:59:59.000Z

199

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

SciTech Connect

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

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

1998-02-01T23:59:59.000Z

200

Worcester 1 Inch Solenoid Actuated Gas Operated VPS System Ball Valve  

SciTech Connect

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

MISKA, C.R.

2000-11-13T23:59:59.000Z

Note: This page contains sample records for the topic "thermostat radiator valve" 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

Pumps, pipes and valves: The heart of a system  

SciTech Connect

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

NONE

1996-05-01T23:59:59.000Z

202

Covered Product Category: Pre-Rinse Spray Valves  

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

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

203

ON CONDITION MONITORING OF EXHAUST VALVES IN MARINE DIESEL ENGINES  

E-Print Network (OSTI)

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

Mosegaard, Klaus

204

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

SciTech Connect

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

Not Available

1983-02-01T23:59:59.000Z

205

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

SciTech Connect

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

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

1991-10-08T23:59:59.000Z

206

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

SciTech Connect

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

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

2008-01-01T23:59:59.000Z

207

Alpha Radiation  

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

Basics of Radiation Basics of Radiation Gamma Radiation and X-Rays Beta Radiation Alpha Radiation Irradiation Radioactive Contamination Definitions Detection Measurement Safety Around Radiation Sources Types of Radiation Exposure Managing Radiation Emergencies Basics of Radiation Characteristics of Alpha Radiation 1. Alpha radiation is not able to penetrate skin. 2. Alpha-emitting materials can be harmful to humans if the materials are inhaled, swallowed, or absorbed through open wounds. 3. A variety of instruments have been designed to measure alpha radiation. Special training in use of these instruments is essential for making accurate measurements. 4. A civil defense instrument (CD V-700) cannot detect the presence of radioactive materials that produce alpha radiation unless the radioactive materials also produce beta and/or gamma radiation.

208

Radiation: Radiation Control (Indiana)  

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

It is the policy of the state to encourage the constructive uses of radiation and to control its harmful effects. This section contains regulations pertaining to the manufacture, use,...

209

Removable check valve for use in a nuclear reactor  

DOE Patents (OSTI)

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

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

1988-01-01T23:59:59.000Z

210

A WEAR MODEL FOR DIESEL ENGINE EXHAUST VALVES  

SciTech Connect

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

Blau, Peter Julian [ORNL

2009-11-01T23:59:59.000Z

211

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

SciTech Connect

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

J. Napoleon

1998-12-01T23:59:59.000Z

212

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

SciTech Connect

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

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

1994-08-01T23:59:59.000Z

213

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

SciTech Connect

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

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

1999-07-01T23:59:59.000Z

214

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

SciTech Connect

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

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

1996-10-01T23:59:59.000Z

215

Failure Modes and Causes for Swing and Lift Type Check Valves  

Office of Scientific and Technical Information (OSTI)

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

216

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

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

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

217

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

SciTech Connect

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

VAN KATWIJK, C.

1999-07-01T23:59:59.000Z

218

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

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

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

219

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

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

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

220

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

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

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

Note: This page contains sample records for the topic "thermostat radiator valve" 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

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

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

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

222

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

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

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

223

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

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

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

224

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

DOE Patents (OSTI)

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

Wright, K.E.

1994-08-23T23:59:59.000Z

225

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

DOE Patents (OSTI)

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

Wright, Kenneth E. (Yardley, PA)

1994-01-01T23:59:59.000Z

226

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

Science Journals Connector (OSTI)

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

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

2013-01-01T23:59:59.000Z

227

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

SciTech Connect

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

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

1986-06-01T23:59:59.000Z

228

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

E-Print Network (OSTI)

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

Yao, Bin

229

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

DOE Patents (OSTI)

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

Wiles, Matthew A.; Marriot, Craig D

2013-07-02T23:59:59.000Z

230

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

E-Print Network (OSTI)

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

Texas at Arlington, University of

231

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

E-Print Network (OSTI)

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

232

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

E-Print Network (OSTI)

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

Luo, Xiaoyu

233

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

E-Print Network (OSTI)

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

Quake, Stephen R.

234

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

E-Print Network (OSTI)

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

Grizzle, Jessy W.

235

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

E-Print Network (OSTI)

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

Fominov, Yakov

236

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

SciTech Connect

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

Maxfield, D.A. (ed.)

1981-01-01T23:59:59.000Z

237

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

E-Print Network (OSTI)

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

Xiao, John Q.

238

About Radiation  

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

Radiation Radiation What is radiation? Radiation is a form of energy that is a part of our everyday lives. All of us receive a "dose" of radiation each day. Most of the dose comes from naturally occurring radioactive materials such as uranium, thorium, radon, and certain forms of potassium and carbon. The air we breathe contains radon, the food we eat contains uranium and thorium from the soil, and our bodies contain radioactive forms of potassium and carbon. Cosmic radiation from the sun also contributes to our natural radiation dose. We also receive radiation doses from man-made sources such as X-rays, nuclear medical procedures, power plants, smoke detectors and older television sets. Some people, such as nuclear plant operators, flight crews, and nuclear medicine staff may also receive an occupational radiation dose.

239

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

DOE Patents (OSTI)

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

Shafer, Scott F. (Morton, IL)

2002-01-01T23:59:59.000Z

240

Two-phase flow characteristics in multiple orifice valves  

SciTech Connect

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

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

2010-11-15T23:59:59.000Z

Note: This page contains sample records for the topic "thermostat radiator valve" 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

Fluid-driven reciprocating apparatus and valving for controlling same  

DOE Patents (OSTI)

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

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

1993-01-01T23:59:59.000Z

242

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

E-Print Network (OSTI)

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

Laughlin, David E.

243

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

E-Print Network (OSTI)

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

Li, Perry Y.

244

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

SciTech Connect

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

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

2006-07-01T23:59:59.000Z

245

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

Science Journals Connector (OSTI)

The aortic valve exhibits complex three-dimensional (3D) anatomy and heterogeneity essential for the long-term efficient biomechanical function. These are, however, challenging to mimic in de novo engineered living tissue valve strategies. We present a novel simultaneous 3D printing/photocrosslinking technique for rapidly engineering complex, heterogeneous aortic valve scaffolds. Native anatomic and axisymmetric aortic valve geometries (root wall and tri-leaflets) with 1222mm inner diameters (ID) were 3D printed with poly-ethylene glycol-diacrylate (PEG-DA) hydrogels (700 or 8000 MW) supplemented with alginate. 3D printing geometric accuracy was quantified and compared using Micro-CT. Porcine aortic valve interstitial cells (PAVIC) seeded scaffolds were cultured for up to 21days. Results showed that blended PEG-DA scaffolds could achieve over tenfold range in elastic modulus (5.30.9 to 74.61.5 kPa). 3D printing times for valve conduits with mechanically contrasting hydrogels were optimized to 14 to 45min, increasing linearly with conduit diameter. Larger printed valves had greater shape fidelity (93.32.6, 85.12.0 and 73.35.2% for 22, 17 and 12mm ID porcine valves; 89.14.0, 84.15.6 and 66.65.2% for simplified valves). PAVIC seeded scaffolds maintained near 100% viability over 21days. These results demonstrate that 3D hydrogel printing with controlled photocrosslinking can rapidly fabricate anatomical heterogeneous valve conduits that support cell engraftment.

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

2012-01-01T23:59:59.000Z

246

Valve assembly for use with high temperature and high pressure fluids  

DOE Patents (OSTI)

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

De Feo, Angelo (Totowa, NY)

1982-01-01T23:59:59.000Z

247

Danger radiations  

ScienceCinema (OSTI)

Le confrencier Mons.Hofert parle des dangers et risques des radiations, le contrle des zones et les prcautions prendre ( p.ex. film badge), comment mesurer les radiations etc.

None

2011-04-25T23:59:59.000Z

248

Coal slurry letdown valve-concept test phase. Final report  

SciTech Connect

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

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

1984-01-01T23:59:59.000Z

249

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

Science Journals Connector (OSTI)

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

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

2012-01-01T23:59:59.000Z

250

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

SciTech Connect

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

Gross, Robert; Harris, Stephen

2007-08-01T23:59:59.000Z

251

Fail Save Shut Off Valve for Filtering Systems Employing Candle Filters  

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

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

252

Failure Modes and Causes for Swing and Lift Type Check Valves  

Office of Scientific and Technical Information (OSTI)

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

253

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

E-Print Network (OSTI)

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

Matthews, Jeffrey A., 1970-

2004-01-01T23:59:59.000Z

254

HIGH-FREQUENCY MAGNETOCAPACITANCE EFFECT IN ORGANIC SPIN VALVE WITH A  

E-Print Network (OSTI)

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

Lin, Minn-Tsong

255

Classification of heart valve single leg separations from acoustic clinical measurements  

SciTech Connect

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

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

1994-05-01T23:59:59.000Z

256

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

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

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

257

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

DOE Patents (OSTI)

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

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

2014-04-01T23:59:59.000Z

258

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

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

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

259

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

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

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

260

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

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

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

Note: This page contains sample records for the topic "thermostat radiator valve" 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

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

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

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

262

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

Science Journals Connector (OSTI)

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

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

2014-01-01T23:59:59.000Z

263

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

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

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

264

Percutaneous aortic valve replacement in a re-animated postmortem heart  

E-Print Network (OSTI)

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

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

2006-01-01T23:59:59.000Z

265

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

SciTech Connect

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

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

1999-06-01T23:59:59.000Z

266

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

Science Journals Connector (OSTI)

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

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

2015-01-01T23:59:59.000Z

267

Plasma Radiation  

Science Journals Connector (OSTI)

... JUST over ten years ago the first book on plasma physics as a subject in its own right appeared; in a gradually swelling stream ... been surprisingly few monographs. One topic which has had scant coverage in any form is plasma radiation (except for spectral-line radiation which has been dealt with very fully in ...

T. J. M. BOYD

1967-07-01T23:59:59.000Z

268

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

SciTech Connect

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

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

1996-12-31T23:59:59.000Z

269

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

SciTech Connect

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

MORGAN, R.G.

1999-06-23T23:59:59.000Z

270

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

E-Print Network (OSTI)

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

Li, Perry Y.

271

Radiation dosimeter  

DOE Patents (OSTI)

A radiation detector readout circuit is provided which produces a radiation dose-rate readout from a detector even though the detector output may be highly energy dependent. A linear charge amplifier including an output charge pump circuit amplifies the charge signal pulses from the detector and pumps the charge into a charge storage capacitor. The discharge rate of the capacitor through a resistor is controlled to provide a time-dependent voltage which when integrated provides an output proportional to the dose-rate of radiation detected by the detector. This output may be converted to digital form for readout on a digital display.

Fox, Richard J. (Oak Ridge, TN)

1983-01-01T23:59:59.000Z

272

Radiation dosimeter  

DOE Patents (OSTI)

A radiation detector readout circuit is provided which produces a radiation dose-rate readout from a detector even through the detector output may be highly energy dependent. A linear charge amplifier including an output charge pump circuit amplifies the charge signal pulses from the detector and pumps the charge into a charge storage capacitor. The discharge rate of the capacitor through a resistor is controlled to provide a time-dependent voltage which when integrated provides an output proportional to the dose-rate of radiation detected by the detector. This output may be converted to digital form for readout on a digital display.

Fox, R.J.

1981-09-01T23:59:59.000Z

273

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

SciTech Connect

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

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

1999-06-01T23:59:59.000Z

274

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

E-Print Network (OSTI)

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

Paris-Sud XI, Université de

275

Appendix G. Radiation Appendix G. Radiation  

E-Print Network (OSTI)

-made sources. People are exposed to naturally occurring radiation constantly. For example, cosmic radiation of radiation and its effects on the environment and biological systems. Radiation comes from natural and humanAppendix G. Radiation #12;#12;Appendix G. Radiation This appendix presents basic facts about

Pennycook, Steve

276

ISOLOK VALVE ACCEPTANCE TESTING FOR DWPF SME SAMPLING PROCESS  

SciTech Connect

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

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

2011-12-05T23:59:59.000Z

277

Thermostat Interface and Usability: A Survey  

E-Print Network (OSTI)

and sensations. Applied Ergonomics, 12(1), 29-33. Boait, P.systems. Applied Ergonomics, 40(2), 165-174. Shipworth, M. ,timer/programmer. Applied Ergonomics, 13(1), 15-23. National

Meier, Alan

2011-01-01T23:59:59.000Z

278

RESIDENTIAL THERMOSTATS: COMFORT CONTROLS IN CALIFORNIA HOMES  

E-Print Network (OSTI)

on boilers, hot water, district heating, spot heating, andpellets) or via district heating systems. Air conditioningwood to charcoal to district heating. www.tecsoc.org/pubs/

Meier, Alan K.

2008-01-01T23:59:59.000Z

279

RESIDENTIAL THERMOSTATS: COMFORT CONTROLS IN CALIFORNIA HOMES  

E-Print Network (OSTI)

of HVAC Installations in New Homes in Nevada Power Companysof HVAC Installations in New Homes in APS Service Territory.Interface: Consolidated Home Control. Personal and

Meier, Alan K.

2008-01-01T23:59:59.000Z

280

A persuasive GPS-controlled thermostat system  

E-Print Network (OSTI)

Using 10 weeks of data from a couple living in an instrumented home, we report on the potential of context-aware power management for energy saving. We identify an opportunity to save on heating and cooling using a system ...

Gupta, Manu, S. M. Massachusetts Institute of Technology

2008-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "thermostat radiator valve" 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

Demand response-enabled residential thermostat controls.  

E-Print Network (OSTI)

human dimension of demand response technology from a caseArens, E. , et al. 2008. Demand Response Enabling TechnologyArens, E. , et al. 2006. Demand Response Enabling Technology

Chen, Xue; Jang, Jaehwi; Auslander, David M.; Peffer, Therese; Arens, Edward A

2008-01-01T23:59:59.000Z

282

RESIDENTIAL THERMOSTATS: COMFORT CONTROLS IN CALIFORNIA HOMES  

E-Print Network (OSTI)

today: Johnson and Honeywell. In terms of regulating theHeat Regulator Co. ) eventually became Honeywell. Butz1885 Furnace regulator In 1906 Honeywell produced the first

Meier, Alan K.

2008-01-01T23:59:59.000Z

283

Thermostatically controlled solar heating and cooling system  

SciTech Connect

This patent describes a solar heating and cooling system for simultaneously heating or cooling an ambient air system within a building, heating a hot water supply for domestic use within the building and heating or cooling a swimming pool adjacent the building comprising a building. This comprises a swimming pool as a primary water source, a solar connector connected to the swimming pool, a heat pump for controlling ambient air temperature within the building, an energy conservation unit connected to the heat pump and to the hot water supply for utilizing hot gases from the heat pump to heat water in the hot water supply and an air heat exchanger connected to the air system and to the heat pump for selectively heating or cooling air in the building. Also a water heat exchanger is connected to a water source for selectively transferring heat between the heat pump and the water source, a well as a secondary water source connected to the water heat exchanger.

Yovanofski, T.

1986-12-16T23:59:59.000Z

284

Demand response-enabled residential thermostat controls.  

E-Print Network (OSTI)

Summer Study on Energy Efficiency in Buildings. Peffer, T. ,on 2008 ACEEE Summer Study on Energy Efficiency in BuildingsSummer Study on Energy Efficiency in Buildings References

Chen, Xue; Jang, Jaehwi; Auslander, David M.; Peffer, Therese; Arens, Edward A

2008-01-01T23:59:59.000Z

285

Thermostat Interface and Usability: A Survey  

E-Print Network (OSTI)

Summer Study on Energy Efficiency in Buildings, 2, 91-100.Study on Energy Efficiency in Buildings, 8.233-238.244.Summer Study on Energy Efficiency in Buildings, 2, 349-360.

Meier, Alan

2011-01-01T23:59:59.000Z

286

Thermostat Interface and Usability: A Survey  

E-Print Network (OSTI)

13 Figure 4: Control4 home automation who specialize in home automation, have added a comfortFigure 4: Control4 home automation interface (Source:

Meier, Alan

2011-01-01T23:59:59.000Z

287

Thermostat Interface and Usability: A Survey  

E-Print Network (OSTI)

greenhouse gas emissions. Home Automation System (HAS): An HAS integrates the control of security, HVAC, lighting,

Meier, Alan

2011-01-01T23:59:59.000Z

288

Thermostat Interface and Usability: A Survey  

E-Print Network (OSTI)

household energy use behaviour in Japan and Norway. Energycultural study of energy behavior in Norway and Japan (

Meier, Alan

2011-01-01T23:59:59.000Z

289

Thermostat Interface and Usability: A Survey  

E-Print Network (OSTI)

of household energy use behaviour in Japan and Norway.Japan (Wilhite, Nakagami, Masuda, Yamaga, & Haneda, 1996) reveals that less than 50% of Oslo's households

Meier, Alan

2011-01-01T23:59:59.000Z

290

RESIDENTIAL THERMOSTATS: COMFORT CONTROLS IN CALIFORNIA HOMES  

E-Print Network (OSTI)

minimizes the use of electric resistance heating. The Titlenormal operation to electric resistance back-up heaters. Aby lower-efficiency electric resistance heat 32 . Reliance

Meier, Alan K.

2008-01-01T23:59:59.000Z

291

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

DOE Patents (OSTI)

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

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

1997-01-14T23:59:59.000Z

292

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

DOE Patents (OSTI)

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

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

1997-01-01T23:59:59.000Z

293

Heart valve cardiomyocytes of mouse embryos express the serotonin transporter SERT  

SciTech Connect

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

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

2008-12-12T23:59:59.000Z

294

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

SciTech Connect

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

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

2013-04-28T23:59:59.000Z

295

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

SciTech Connect

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

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

1994-12-31T23:59:59.000Z

296

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

Science Journals Connector (OSTI)

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

Mara M. Milanese; Jorge O. Pouzo; Osvaldo D. Cortzar; Roberto L. Moroso

2006-01-01T23:59:59.000Z

297

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

Science Journals Connector (OSTI)

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

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

2004-06-03T23:59:59.000Z

298

ULTRA SECURE HIGH RELIABILITY WIRELESS RADIATION MONITOR  

SciTech Connect

Radiation monitoring in nuclear facilities is essential to safe operation of the equipment as well as protecting personnel. In specific, typical air monitoring of radioactive gases or particulate involves complex systems of valves, pumps, piping and electronics. The challenge is to measure a representative sample in areas that are radioactively contaminated. Running cables and piping to these locations is very expensive due to the containment requirements. Penetration into and out of an airborne or containment area is complex and costly. The process rooms are built with thick rebar-enforced concrete walls with glove box containment chambers inside. Figure 1 shows high temperature radiation resistance cabling entering the top of a typical glove box. In some case, the entire processing area must be contained in a 'hot cell' where the only access into the chamber is via manipulators. An example is shown in Figure 2. A short range wireless network provides an ideal communication link for transmitting the data from the radiation sensor to a 'clean area', or area absent of any radiation fields or radioactive contamination. Radiation monitoring systems that protect personnel and equipment must meet stringent codes and standards due to the consequences of failure. At first glance a wired system would seem more desirable. Concerns with wireless communication include latency, jamming, spoofing, man in the middle attacks, and hacking. The Department of Energy's Savannah River National Laboratory (SRNL) has developed a prototype wireless radiation air monitoring system that address many of the concerns with wireless and allows quick deployment in radiation and contamination areas. It is stand alone and only requires a standard 120 VAC, 60 Hz power source. It is designed to be mounted or portable. The wireless link uses a National Security Agency (NSA) Suite B compliant wireless network from Fortress Technologies that is considered robust enough to be used for classified data transmission in place of NSA Type 1 devices.

Cordaro, J.; Shull, D.; Farrar, M.; Reeves, G.

2011-08-03T23:59:59.000Z

299

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

DOE Patents (OSTI)

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

Meisner, Gregory P

2013-10-08T23:59:59.000Z

300

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

SciTech Connect

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

Sulfredge, Charles David [ORNL

2007-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "thermostat radiator valve" 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

Radiation receiver  

DOE Patents (OSTI)

The apparatus for collecting radiant energy and converting same to alternate energy form includes a housing having an interior space and a radiation transparent window allowing, for example, solar radiation to be received in the interior space of the housing. Means are provided for passing a stream of fluid past said window and for injecting radiation absorbent particles in said fluid stream. The particles absorb the radiation and because of their very large surface area, quickly release the heat to the surrounding fluid stream. The fluid stream particle mixture is heated until the particles vaporize. The fluid stream is then allowed to expand in, for example, a gas turbine to produce mechanical energy. In an aspect of the present invention properly sized particles need not be vaporized prior to the entrance of the fluid stream into the turbine, as the particles will not damage the turbine blades. In yet another aspect of the invention, conventional fuel injectors are provided to inject fuel into the fluid stream to maintain the proper temperature and pressure of the fluid stream should the source of radiant energy be interrupted. In yet another aspect of the invention, an apparatus is provided which includes means for providing a hot fluid stream having hot particles disbursed therein which can radiate energy, means for providing a cooler fluid stream having cooler particles disbursed therein, which particles can absorb radiant energy and means for passing the hot fluid stream adjacent the cooler fluid stream to warm the cooler fluid and cooler particles by the radiation from the hot fluid and hot particles. 5 figs.

Hunt, A.J.

1983-09-13T23:59:59.000Z

302

Analysis of HFIR pressurizer pump overspeed transients and relief valve performance  

SciTech Connect

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

Sozer, M.C.

1992-09-11T23:59:59.000Z

303

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

E-Print Network (OSTI)

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

304

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

E-Print Network (OSTI)

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

Gao, Song

305

Fail save shut off valve for filtering systems employing candle filters  

DOE Patents (OSTI)

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

VanOsdol, John (Fairmont, WV)

2006-01-03T23:59:59.000Z

306

Fail Save Shut Off Valve for Filtering Systems Employing Candle Filters  

DOE Patents (OSTI)

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

VanOsdol, John

2006-01-03T23:59:59.000Z

307

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

SciTech Connect

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

Candy, J V

1999-10-31T23:59:59.000Z

308

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

SciTech Connect

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

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

2014-05-07T23:59:59.000Z

309

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

SciTech Connect

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

MINTEER, D.J.

2000-09-19T23:59:59.000Z

310

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

E-Print Network (OSTI)

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

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

2012-01-01T23:59:59.000Z

311

Radiation Protection Act (Pennsylvania)  

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

This Act combines the radiation safety provisions of The Atomic Energy Development and Radiation Control Act and the Environmental Radiation Protection Act, and empowers the Department of...

312

Radiation protection: Natural radiation risks  

Science Journals Connector (OSTI)

... radiation to which humans are exposed consists of four components - cosmic, gamma, internal, radon. The relative contribution that each makes to the sum is shown in the chart. ... but exposure of the whole body to terrestrial gamma rays and of the lungs to radon daughters are influenced by the nature and location of housing. Gamma rays are emitted ...

M. C. O'Riordan

1983-11-17T23:59:59.000Z

313

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

SciTech Connect

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

HICKS, D.F.

1999-08-12T23:59:59.000Z

314

An Active Motion Compensation Instrument for Beating Heart Mitral Valve Surgery  

E-Print Network (OSTI)

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

315

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

E-Print Network (OSTI)

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

Boyer, Edmond

316

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

E-Print Network (OSTI)

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

Zand, Robert

317

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

E-Print Network (OSTI)

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

Boyer, Edmond

318

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

E-Print Network (OSTI)

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

319

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

Science Journals Connector (OSTI)

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

Raymond Annino; Jim Leone

1982-01-01T23:59:59.000Z

320

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

E-Print Network (OSTI)

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

Wadley, Haydn

Note: This page contains sample records for the topic "thermostat radiator valve" 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

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

E-Print Network (OSTI)

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

Zell, Andreas

322

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

SciTech Connect

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

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

1993-09-01T23:59:59.000Z

323

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

Science Journals Connector (OSTI)

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

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

2012-01-01T23:59:59.000Z

324

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

SciTech Connect

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

Fang, W.; Nutter, D.W.

1999-07-01T23:59:59.000Z

325

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

SciTech Connect

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

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

1993-07-16T23:59:59.000Z

326

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

SciTech Connect

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

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

1993-12-01T23:59:59.000Z

327

Radiating gravastars  

SciTech Connect

Considering a Vaidya exterior spacetime, we study dynamical models of prototype gravastars, made of an infinitely thin spherical shell of a perfect fluid with the equation of state p = ?, enclosing an interior de Sitter spacetime. We show explicitly that the final output can be a black hole, an unstable gravastar, a stable gravastar or a 'bounded excursion' gravastar, depending on how the mass of the shell evolves in time, the cosmological constant and the initial position of the dynamical shell. This work presents, for the first time in the literature, a gravastar that emits radiation.

Chan, R. [Coordenao de Astronomia e Astrofsica, Observatrio Nacional, Rua General Jos Cristino, 77, So Cristvo 20921-400, Rio de Janeiro, RJ (Brazil); Silva, M.F.A. da [Departamento de Fsica Terica, Instituto de Fsica, Universidade do Estado do Rio de Janeiro, Rua So Francisco Xavier 524, Maracan 20550-900, Rio de Janeiro - RJ (Brazil); Rocha, Jaime F. Villas da [Instituto de Biocincias, Departamento de Cincias Naturais, Universidade Federal do Estado do Rio de Janeiro, Av. Pasteur 458, Urca, CEP 22290-240, Rio de Janeiro, RJ (Brazil); Wang, Anzhong, E-mail: chan@on.br, E-mail: mfasnic@gmail.com, E-mail: jfvroch@pq.cnpq.br, E-mail: anzhong_wang@baylor.edu [GCAP-CASPER, Department of Physics, Baylor University, Waco, TX 76798 (United States)

2011-10-01T23:59:59.000Z

328

Natural and Radiation Carcinogenesis in Man. III. Radiation Carcinogenesis  

Science Journals Connector (OSTI)

...mice. NATURAL AND RADIATION CARCINOGENESIS IN MAN. 3. RADIATION CARCINOGENESIS. | Journal Article | Japan Neoplasms etiology Neoplasms, Radiation-Induced Radiation Genetics | JAPAN NEOPLASM ETIOLOGY NEOPLASMS, RADIATION-INDUCED RADIATION...

1965-01-01T23:59:59.000Z

329

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

E-Print Network (OSTI)

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

Kassakian, John G.

330

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

Science Journals Connector (OSTI)

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

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

2011-09-01T23:59:59.000Z

331

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

Science Journals Connector (OSTI)

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

Chunzhe Shi

2012-01-01T23:59:59.000Z

332

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

Science Journals Connector (OSTI)

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

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

1998-01-01T23:59:59.000Z

333

Hydronic Controls Retrofits for Low-Rise Multi-Famiy Buildings  

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

Residential Integrated Energy Solutions Residential Integrated Energy Solutions Building America Stakeholder Meeting Austin, Texas February 29 to March 2, 2012 Hugh Henderson, CDH Energy Corp. Jordan Dentz, The Levy Partnership, Inc. Hydronic Controls Retrofits for Low-Rise Multi-Family Buildings Research Objective * Determine the impact of control strategies that use apartment temperatures for central boiler control on energy consumption, comfort and cost. * Compare energy performance, comfort and cost to individual radiator valve controls in each apartment. Background * Most multi-family boiler systems have: - No zone/apartment level control, or - Non-electric thermostats on radiator valves * Central boiler system resets hot water based on outdoor temperature * Problem: - apartments are often too hot or too cold.

334

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

SciTech Connect

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

Not Available

2002-01-01T23:59:59.000Z

335

Adaptors for radiation detectors  

DOE Patents (OSTI)

Described herein are adaptors and other devices for radiation detectors that can be used to make accurate spectral measurements of both small and large bulk sources of radioactivity, such as building structures, soils, vessels, large equipment, and liquid bodies. Some exemplary devices comprise an adaptor for a radiation detector, wherein the adaptor can be configured to collimate radiation passing through the adapter from an external radiation source to the radiation detector and the adaptor can be configured to enclose a radiation source within the adapter to allow the radiation detector to measure radiation emitted from the enclosed radiation source.

Livesay, Ronald Jason

2014-04-22T23:59:59.000Z

336

Radiation Safety  

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

Brotherhood of Locomotive Brotherhood of Locomotive Engineers & Trainmen Scott Palmer BLET Radiation Safety Officer New Hire Training New Hire study topics * GCOR * ABTH * SSI * Employee Safety * HazMat * Railroad terminology * OJT * 15-week class * Final test Hazardous Materials * Initial new-hire training * Required by OSHA * No specified class length * Open book test * Triennial module Locomotive Engineer Training A little bit older...a little bit wiser... * Typically 2-4 years' seniority * Pass-or-get-fired promotion * Intensive program * Perpetually tested to a higher standard * 20 Weeks of training * 15 of that is OJT * General Code of Operating Rules * Air Brake & Train Handling * System Special Instructions * Safety Instructions * Federal Regulations * Locomotive Simulators * Test Ride * Pass test with 90% Engineer Recertification

337

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

Office of Legacy Management (LM)

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

338

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

SciTech Connect

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

Diamond, D.J.

1987-01-01T23:59:59.000Z

339

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

SciTech Connect

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

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

2014-05-07T23:59:59.000Z

340

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

SciTech Connect

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

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

1991-12-31T23:59:59.000Z

Note: This page contains sample records for the topic "thermostat radiator valve" 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

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

SciTech Connect

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

Sine, G.C.

1980-11-01T23:59:59.000Z

342

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

SciTech Connect

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

HAMMERS, J.S.

1999-08-25T23:59:59.000Z

343

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

E-Print Network (OSTI)

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

Zand, Robert

344

Printed in the United States of America. Available from National Technical Information Service  

E-Print Network (OSTI)

for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed ................................. 37 5.3 Thermostatic Expansion Valve Model ................... 39 5.4 Short Tube Orifice Model

Oak Ridge National Laboratory

345

Printed in the United States of America. Available from National Technical Information Service  

E-Print Network (OSTI)

for the accuracy. completeness, or usefulness of any information, apparatus. product, or process disclosed ................................. 37 5.3 Thermostatic Expansion Valve Model ................... 39 5.4 Short Tube Orifice Model

Oak Ridge National Laboratory

346

Nuclear radiation electronic gear  

Science Journals Connector (OSTI)

Nuclear radiation electronic gear ... Examines the line of nuclear radiation instrumentation offered by Nuclear-Chicago Corporation and Victoreen Instrument Company. ... Nuclear / Radiochemistry ...

S. Z. Lewin

1961-01-01T23:59:59.000Z

347

Radiation Control (Virginia)  

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

The Department of Health is responsible for regulating radiation and radioactive materials in the Commonwealth of Virginia. Although the Department's Radiation Control Program primarily focuses on...

348

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

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

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

349

Low Dose Radiation Program: Radiation Biology and the Radiation Research  

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

Biology and the Radiation Research Program Biology and the Radiation Research Program The Department of Energy (DOE) and its predecessor organizations, Energy Research and Development Agency (ERDA) and Atomic Energy Commission (AEC), always have been concerned about the health effects of ionizing radiation. Extensive research has been conducted under their sponsorship at all levels of biological organization from molecules to man. Over the past 60 years, studies using every type of radiation source have included exposure to both external radiation sources and to internally deposited radioactive materials. These exposures used different dose patterns and distributions delivered over a wide range of experimental times. This extensive research provided the basis for the new Low Dose Radiation Research Program, linking

350

radiation.p65  

Office of Legacy Management (LM)

5 5 United States Department of Energy This fact sheet explains the potential health hazards associated with the radioactive decay of uranium and other radioactive elements found in ore and mill tailings. Potential Health Hazards of Radiation Man-made sources of radiation, most notably from medical uses and consumer products, contribute to the remaining radiation dose that individuals receive. A few household products, including smoke detectors, micro- wave ovens, and color televisions, emit small amounts of radiation. For most people, the benefits from using such products far outweigh the radiation risks. Radiation Dose Radiation is measured in various units. Individuals who have been exposed to radiation have received a radiation dose. Radiation dose to people is expressed in

351

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

SciTech Connect

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

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

2012-01-01T23:59:59.000Z

352

Radiation Protection and Safety Training | Environmental Radiation...  

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

The objective of this course is to provide students with an introduction to the fundamentals of ionizing radiation protection and safety. The course curriculum combines...

353

Atmospheric Radiation Measurement Radiative Atmospheric Divergence...  

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

radiation emitted by the earth. This instrument is onboard a European Union geostationary weather satellite launched in December 2005; it is collecting data over Niamey and the...

354

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

SciTech Connect

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

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

1995-07-01T23:59:59.000Z

355

radiation.cdr  

Office of Legacy Management (LM)

Radiation-It's a Fact of Life Radiation-It's a Fact of Life It has been with us since the beginning of time. Everyone who has ever walked on this planet has been exposed to radiation. For the most part, nature is the largest source of exposure. It's in the air we breathe, the ground we walk on, and even the food we eat. The radiation we receive from all natural and some man-made sources is called "background radiation." The millirem (mrem) is a unit used for measuring radiation received by a person. The total average background for radiation received by people living in the United States is 360 millirem per year (mrem/yr), of which 300 mrem/yr is from natural sources, and 60 mrem/yr is man-made. Cosmic Radiation from the sun and stars Internal Radiation from naturally radioactive

356

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

E-Print Network (OSTI)

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

Gusev, Guennady

357

Vertical poloidal asymmetries of low-Z element radiation in the PDX tokamak  

SciTech Connect

Vertical poloidal asymmetries of hydrogen isotopes and low-Z impurity radiation in the PDX tokamak may be caused by poloidally asymmetric sources of these elements at gas inlet valves, limiters or vacuum vessel walls, asymmetric magnetic field geometry in the region beyond the plasma boundary, or by ion curvature drifts. Low ionization states of carbon (C II- C IV) are more easily influenced by edge conditions than is CV. Vertical poloidal asymmetries of CV are correlated with the direction of the toroidal field. The magnitude of the asymmetry agrees with the predictions of a quasifluid neoclassical model. Experimental data and numerical simulations are presented to investigate different models of impurity poloidal asymmetries.

Brau, K.; Suckewer, S.; Wong, S.K.

1983-06-01T23:59:59.000Z

358

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

E-Print Network (OSTI)

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

Presswood, James Columbus

1977-01-01T23:59:59.000Z

359

Plutonium radiation surrogate  

DOE Patents (OSTI)

A self-contained source of gamma-ray and neutron radiation suitable for use as a radiation surrogate for weapons-grade plutonium is described. The source generates a radiation spectrum similar to that of weapons-grade plutonium at 5% energy resolution between 59 and 2614 keV, but contains no special nuclear material and emits little .alpha.-particle radiation. The weapons-grade plutonium radiation surrogate also emits neutrons having fluxes commensurate with the gamma-radiation intensities employed.

Frank, Michael I. (Dublin, CA)

2010-02-02T23:59:59.000Z

360

Heating Equipment Checklist for Winter Comfort and Efficiency...  

Office of Environmental Management (EM)

equipment checklist.png Read more about maintaining furnaces and boilers, radiators, heat pumps, and thermostats. Show your cooling system some love as well. If you have...

Note: This page contains sample records for the topic "thermostat radiator valve" 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

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

Science Journals Connector (OSTI)

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

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

2009-01-01T23:59:59.000Z

362

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

Science Journals Connector (OSTI)

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

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

2012-01-01T23:59:59.000Z

363

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

SciTech Connect

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

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

1987-01-01T23:59:59.000Z

364

Radiation Safety Program Annual Review  

E-Print Network (OSTI)

........................................................................10 AREA RADIATION SURVEYS AND CONTAMINATION CONTROL...........................................11.....................................................................................................13 RADIOACTIVE WASTE MANAGEMENT meetings of the Radiation Safety Committee where new users and uses of radioactive materials, radiation

Lyubomirsky, Ilya

365

Radiator Labs | Department of Energy  

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

of steam buildings. Radiator Labs developed a mechanism that allows heating systems to control heat transfer at each radiator. The Radiator Labs design utilizes an...

366

The universal radiative transport equation  

E-Print Network (OSTI)

THE UNIVERSAL RADIATIVE TRANSPORT EQUATION Rudolph W.The Universal Radiative Transport Equation Rudolph W.The various radiative transport equations used in general

Preisendorfer, Rudolph W

1959-01-01T23:59:59.000Z

367

Radiation Dose Estimates from  

E-Print Network (OSTI)

Summary: Radiation Dose Estimates from Hanford Radioactive Material Releases to the Air- tantly, what radiation dose people may have received. An independent Technical Steering Panel (TSP, additionalProjectworkcouldresultin revisions of these dose estimates. April 21, 1994 Companion

368

Maryland Radiation Act (Maryland)  

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

The policy of the state is to provide for the constructive use of radiation and control radiation emissions. This legislation authorizes the Department of the Environment to develop comprehensive...

369

WI Radiation Protection  

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

This statute seeks to regulate radioactive materials, to encourage the constructive uses of radiation, and to prohibit and prevent exposure to radiation in amounts which are or may be detrimental...

370

RADIONUCLIDE RADIATION PROTECTION  

E-Print Network (OSTI)

COPYRIGHT 2002 Nuclear Technology Publishing #12;3 #12;4 #12;5 Radiation Protection Dosimetry Vol. 98, No'Energie Atomique, CEA/Saclay, France ISBN 1 870965 87 6 RADIATION PROTECTION DOSIMETRY Vol. 98 No 1, 2002 Published by Nuclear Technology Publishing #12;RADIONUCLIDE AND RADIATION PROTECTION DATA HANDBOOK 2nd Edition (2002

Healy, Kevin Edward

371

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

E-Print Network (OSTI)

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

Yao, Bin

372

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

E-Print Network (OSTI)

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

Yao, Bin

373

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

E-Print Network (OSTI)

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

374

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

E-Print Network (OSTI)

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

Liepmann, Dorian

375

Radioactivity and Radiation  

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

Radioactivity and Radiation Radioactivity and Radiation Uranium and Its Compounds line line What is Uranium? Chemical Forms of Uranium Properties of Uranium Compounds Radioactivity and Radiation Uranium Health Effects Radioactivity and Radiation Discussion of radioactivity and radiation, uranium and radioactivity, radiological health risks of uranium isotopes and decay products. Radioactivity Radioactivity is the term used to describe the natural process by which some atoms spontaneously disintegrate, emitting both particles and energy as they transform into different, more stable atoms. This process, also called radioactive decay, occurs because unstable isotopes tend to transform into a more stable state. Radioactivity is measured in terms of disintegrations, or decays, per unit time. Common units of radioactivity

376

TERSat: Trapped Energetic Radiation Satellite  

E-Print Network (OSTI)

Radiation damage caused by interactions with high-energy particles in the Van Allen Radiation Belts is a leading

Clements, Emily B.

2012-01-01T23:59:59.000Z

377

Americans' Average Radiation Exposure  

SciTech Connect

We live with radiation every day. We receive radiation exposures from cosmic rays, from outer space, from radon gas, and from other naturally radioactive elements in the earth. This is called natural background radiation. It includes the radiation we get from plants, animals, and from our own bodies. We also are exposed to man-made sources of radiation, including medical and dental treatments, television sets and emission from coal-fired power plants. Generally, radiation exposures from man-made sources are only a fraction of those received from natural sources. One exception is high exposures used by doctors to treat cancer patients. Each year in the United States, the average dose to people from natural and man-made radiation sources is about 360 millirem. A millirem is an extremely tiny amount of energy absorbed by tissues in the body.

NA

2000-08-11T23:59:59.000Z

378

Radiation: Facts, Risks and Realities  

E-Print Network (OSTI)

of Radiation 3 Understanding Radiation Risks 6 Naturally Occurring (Background) Radiation 7 Man-Made Radiation, beta particles and gamma rays. Other types, such as x-rays, can occur naturally or be machine-produced. Scientists have also learned that radiation sources are naturally all around us. Radiation can come from

379

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

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

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

380

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

SciTech Connect

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

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

2013-04-16T23:59:59.000Z

Note: This page contains sample records for the topic "thermostat radiator valve" 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

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

SciTech Connect

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

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

2014-04-14T23:59:59.000Z

382

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

SciTech Connect

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

Harris, S.; Gross, R.

2014-04-01T23:59:59.000Z

383

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

SciTech Connect

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

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

2001-06-01T23:59:59.000Z

384

Thermal engineering of non-local resistance in lateral spin valves  

SciTech Connect

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

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

2014-04-21T23:59:59.000Z

385

Radiation physics, biophysics, and radiation biology  

SciTech Connect

Research at the Center for Radiological Research is a multidisciplenary blend of physics, chemistry and biology aimed at understanding the mechanisms involved in the health problems resulting from human exposure to ionizing radiations. The focus is increased on biochemistry and the application of the techniques of molecular biology to the problems of radiation biology. Research highlights of the program from the past year are described. A mathematical model describing the production of single-strand and double-strand breaks in DNA as a function radiation quality has been completed. For the first time Monte Carlo techniques have been used to obtain directly the spatial distribution of DNA moieties altered by radiation. This information was obtained by including the transport codes a realistic description of the electronic structure of DNA. We have investigated structure activity relationships for the potential oncogenicity of a new generation of bioreductive drugs that function as hypoxic cytotoxins. Experimental and theoretical investigation of the inverse dose rate effect, whereby medium LET radiations actually produce an c effect when the dose is protracted, is now at a point where the basic mechanisms are reasonably understood and the complex interplay between dose, dose rate and radiation quality which is necessary for the effect to be present can now be predicted at least in vitro. In terms of early radiobiological damage, a quantitative link has been established between basic energy deposition and locally multiply damaged sites, the radiochemical precursor of DNA double strand breaks; specifically, the spatial and energy deposition requirements necessary to form LMDs have been evaluated. For the first time, a mechanically understood biological fingerprint'' of high-LET radiation has been established. Specifically measurement of the ratio of inter-to intra-chromosomal aberrations produces a unique signature from alpha-particles or neutrons.

Hall, E.J.; Zaider, M.

1993-05-01T23:59:59.000Z

386

Atmospheric Radiation Measurement Program  

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

3 3 ARM 2003 Tom Ackerman Chief Scientist Tom Ackerman Chief Scientist ARM ARM Atmospheric Radiation Measurement Atmospheric Radiation Measurement WARNING! WARNING! Today is April 1 But that has NO bearing on this message Today is April 1 But that has NO bearing on this message ARM ARM Atmospheric Radiation Measurement Atmospheric Radiation Measurement Two Topics Two Topics * Status of ARM (quick overview) * Science plan - ARM in the next 5 years * Status of ARM (quick overview) * Science plan - ARM in the next 5 years ARM ARM Atmospheric Radiation Measurement Atmospheric Radiation Measurement ARM Status - Science ARM Status - Science * Steadily increasing productivity - Poster session - over 220 posters (may need to do something about submissions next year) - Peer-reviewed articles: 2.5 to 3 per year per

387

The flying radiation case  

SciTech Connect

The Los Alamos foil implosion program has the goal of producing an intense, high-energy density x-ray source by converting the energy of a magnetically imploded plasma into radiation and material energy. One of the methods for converting the plasma energy into thermal energy and radiation and utilizing it for experiments is called the flying radiation case (FRC). In this paper the authors shall model the FRC and provide a physical description of the processes involved. An analytic model of a planar FRC in the hydrodynamic approximation is used to describe the assembly and shock heating of a central cushion by a conducting liner driver. The results are also used to benchmark a hydrodynamics code for modeling an FRC. They then use a radiation-hydrodynamics computational model to explore the effects of radiation production and transport when a gold plasma assembles on a CH cushion. Results are presented for the structure and evolution of the radiation hohlraum.

Brownell, J.H.; Bowers, R.L. [Los Alamos National Lab., NM (United States). Applied Theoretical and Computational Physics Div.

1997-04-01T23:59:59.000Z

388

RHOBOT: Radiation hardened robotics  

SciTech Connect

A survey of robotic applications in radioactive environments has been conducted, and analysis of robotic system components and their response to the varying types and strengths of radiation has been completed. Two specific robotic systems for accident recovery and nuclear fuel movement have been analyzed in detail for radiation hardness. Finally, a general design approach for radiation-hardened robotics systems has been developed and is presented. This report completes this project which was funded under the Laboratory Directed Research and Development program.

Bennett, P.C.; Posey, L.D. [Sandia National Labs., Albuquerque, NM (United States)

1997-10-01T23:59:59.000Z

389

Atomic Radiation (Illinois)  

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

This article states permissible levels of radiation in unrestricted areas, environmental standards for uranium fuel cycle and information about notification of incidents.

390

Radiation.cdr  

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

An average American's exposure is about 620 millirems per year from naturally occurring and other sources. Other Factors Background radiation varies with location....

391

Radiation Hazards Program (Minnesota)  

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

These regulations, promulgated by the Department of Health, set allowable radiation standards and mitigation practices, as well as procedures for the transportation of hazardous material.

392

Radiation Safety September 2013  

E-Print Network (OSTI)

...................................................................................... 8 2.6 RUA Holder........................................................................................................ 11 3.3 Radiation Use Authorization (RUA).......................................................................................... 11 3.4 Review of RUA Applications

California at Irvine, University of

393

Radiative polarization of electrons  

Science Journals Connector (OSTI)

We present a new method of calculating the radiative polarization of electrons in homogeneous magnetic fields, using the modified electron propagation function.

Julian Schwinger and Wu-yang Tsai

1974-03-15T23:59:59.000Z

394

Appendix F. Radiation Appendix F. Radiation F-3  

E-Print Network (OSTI)

from natural and human-made sources. People are exposed to naturally occurring radiation constantlyAppendix F. Radiation #12;#12;Appendix F. Radiation F-3 Appendix F. Radiation This appendix presents basic facts about radiation. The information is intended to be a basis for understanding

Pennycook, Steve

395

Appendix F: Radiation Appendix F: Radiation F-3  

E-Print Network (OSTI)

. People are exposed to naturally occurring radiation constantly. For example, cosmic radiation; radon effects on the environment and biological systems. Radiation comes from natural and human-made sourcesAppendix F: Radiation #12;#12;Appendix F: Radiation F-3 P P P E E E N NN HYDROGEN ATOM DEUTERIUM

Pennycook, Steve

396

Appendix F: Radiation Appendix F: Radiation F-3  

E-Print Network (OSTI)

to naturally occurring radiation constantly. For example, cosmic radiation; radon in air; potassium in food on the environment and biological systems. Radiation comes from natural and human-made sources. People are exposedAppendix F: Radiation #12;#12;Appendix F: Radiation F-3 Fig. F.1. The hydrogen atom and its

Pennycook, Steve

397

Appendix G. Radiation Appendix G. Radiation G-3  

E-Print Network (OSTI)

from natural and human-made sources. People are exposed to naturally occurring radiation constantlyAppendix G. Radiation #12;#12;Appendix G. Radiation G-3 Appendix G. Radiation This appendix presents basic facts about radiation. The information is intended to be a basis for un- derstanding

Pennycook, Steve

398

Appendix F. Radiation Appendix F. Radiation F-3  

E-Print Network (OSTI)

from natural and human-made sources. People are exposed to naturally occurring radiation constantlyAppendix F. Radiation #12;#12;Appendix F. Radiation F-3 Appendix F. Radiation This appendix presents basic facts about radiation. The information is intended to be a basis for un- derstanding

Pennycook, Steve

399

Radiation physics, biophysics, and radiation biology  

SciTech Connect

The following research programs from the Center for Radiological Research of Columbia University are described: Design and development of a new wall-less ultra miniature proportional counter for nanodosimetry; some recent measurements of ionization distributions for heavy ions at nanometer site sizes with a wall-less proportional counter; a calculation of exciton energies in periodic systems with helical symmetry: application to a hydrogen fluoride chain; electron energy-loss function in polynucleotide and the question of plasmon excitation; a non-parametric, microdosimetric-based approach to the evaluation of the biological effects of low doses of ionizing radiation; high-LET radiation risk assessment at medium doses; high-LET radiobiological effects: increased lesion severity or increased lesion proximity; photoneutrons generated by high energy medical linacs; the biological effectiveness of neutrons; implications for radiation protection; molecular characterization of oncogenes induced by neutrons; and the inverse dose-rate effect for oncogenic transformation by charged particles is LET dependent.

Hall, E.J.

1992-05-01T23:59:59.000Z

400

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

SciTech Connect

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

Not Available

1994-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "thermostat radiator valve" 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

COLUMBIA UNIVERSITY Radiation Safety Program  

E-Print Network (OSTI)

DDE ESTIMATED DOSE FROM CONCEPTION TO DECLARATION: DDE Radiation Safety Officer Signature for increased protection from ionizing radiation for declared pregnant radiation workers. The radiation dose of the occupational dose limit of 50 mSv (5.0 rem). The CPMC Radiation Safety Office will provide education

Jia, Songtao

402

RADIATION ONCOLOGY TARGET YOUR FUTURE  

E-Print Network (OSTI)

. · Radiation therapist - a health professional who designs, calculates (plans) and provides the radiation dose and monitors the delivery of radiation therapy, taking into account the protection and safety of patientsRADIATION ONCOLOGY TARGET YOUR FUTURE #12;A Career in Radiation Oncology YOUR CHOICE SAVE LIVES

Tobar, Michael

403

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

SciTech Connect

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

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

2014-03-21T23:59:59.000Z

404

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

SciTech Connect

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

Harris, S.

2012-03-26T23:59:59.000Z

405

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

Science Journals Connector (OSTI)

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

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

2006-01-01T23:59:59.000Z

406

Radiation safety system  

Science Journals Connector (OSTI)

......occupational illness to personnel, major damage...acceptable levels. Selection of control measures...or equipment operating correctly in...99 103 to 104 Personnel life safety...and abnormal operating conditions under...radiation risk to personnel, public and...worker radiation training) reduces the......

Vaclav Vylet; James C. Liu; Lawrence S. Walker

2009-11-01T23:59:59.000Z

407

Radiation safety system  

Science Journals Connector (OSTI)

......disable this safety function and...circuits and software. Other required...source in case of radiation monitors. Feedback...from other non-safety systems to prevent...write and check software. The expected...logic systems for safety functions can...levels of prompt radiation hazard. ACS......

Vaclav Vylet; James C. Liu; Lawrence S. Walker

2009-11-01T23:59:59.000Z

408

Risks from ionizing radiation  

Science Journals Connector (OSTI)

... RADON indoors now accounts for nearly half of the average UK population exposure to ionizing radiation ... exposure to ionizing radiation. We believe that the extent of the variation in exposure to radon in the United Kingdom and else-where and its magnitude in relation to exposures from ...

R. H. Clarke; T. R. E. Southwood

1989-03-16T23:59:59.000Z

409

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

SciTech Connect

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

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

2014-01-01T23:59:59.000Z

410

Radiation Weighting Factors and High Energy Radiation  

Science Journals Connector (OSTI)

......generally inadequate for high energy radiation. In order to determine...appropriate wR values in the high energy region, several criteria are...are proposed for neutrons of energy above 100 MeV and for protons above 10 MeV. The wR value for muons is confirmed to be practically......

M. Pelliccioni

1998-12-01T23:59:59.000Z

411

Radiation effects on humans  

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

Radiation effects on humans Radiation effects on humans Name: Joe Kemna Location: N/A Country: N/A Date: N/A Question: I am trying to find information on radiation. I need the effects on humans, the damage it causes to the environment, and any extra information you might have on the subject. Thank you for your time. Replies: Your library should be a good place to start, but first you need to narrow your question a bit. "Radiation" means radio waves, heat, light (including the ultraviolet light that causes suntan and sunburn), and what's called "ionizing radiation." By far the major source of the first three is the Sun, while the last I believe comes principally from cosmic rays and various naturally radioactive elements like uranium and radon. The most significant manmade sources of exposure would --- I think --- be household wiring and appliances (radio), engines and heating devices (heat), lamps (light), and X-ray machines, flying at high altitude in airplanes, and living in well-insulated homes built over radon sources (ionizing radiation). Heat, light and ionizing radiation play vital roles in the ecology of the Earth. Radio, light (in particular "tanning" ultraviolet), and ionizing radiation have all been widely assumed at different times to be particularly good or particularly bad for human health. Some recent issues of public concern have been the effect of radio waves from electric transmission lines, the effect on skin cancer incidence from tanning and sunburns, the depletion of the ultraviolet-light-produced ozone in the upper atmosphere by chlorofluorocarbons (CFCs), "global warming" from the increased absorption of heat radiation from the surface by atmospheric carbon dioxide and methane, and the effect of a long exposure to low levels of ionizing radiation as for example the people of Eastern Europe are experiencing from the Chernobyl nuclear power plant accident.

412

Candidate Radiation Drugs Inch Forward  

Science Journals Connector (OSTI)

Candidate Radiation Drugs Inch Forward 10.1126/science.331.6024...radiation, workers at the damaged Fukushima nuclear plant wear protective gear...Candidate radiation drugs inch forward. | News | 0 (E)-4-carboxystyryl-4-chlorobenzylsulfone...

Yudhijit Bhattacharjee

2011-03-25T23:59:59.000Z

413

Radiation-Induced Bystander Effects and Relevance to Human Radiation  

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

Radiation-Induced Bystander Effects and Relevance to Human Radiation Radiation-Induced Bystander Effects and Relevance to Human Radiation Exposures Review of phenomenon appears in Radiation Research Pamela Sykes and Benjamin Blyth One concern of radiobiologists is the effect radiation exposure might have on nearby unirradiated cells. For example, when only a small fraction of cells are directly hit by radiation energy, are the surrounding unirradiated cells also at an increased risk of cancer? The term "radiation-induced bystander effect" is used to describe radiation-induced biological changes that occur in unirradiated cells within an irradiated cell population. Radiation-induced bystander effects have become established in the vernacular and are considered as an authentic radiation response. However, there is still no consensus on a precise definition of the term, which

414

Energy saving dispatch with complex constraints: Prohibited zones, valve point effect and carbon tax  

Science Journals Connector (OSTI)

Abstract This paper presents an energy saving dispatch (ESD) strategy, based upon the optimal power flow (OPF) model, considering complex constraints, such as prohibited operating zones, the valve point effect of generation units and the carbon tax of a power grid. With these constraints, the OPF problem becomes more difficult to resolve, and it needs to be dealt with by a more accurate and reliable optimization algorithm. In this paper, an improved group search optimizer (GSO), namely the group search optimizer with intraspecific competition and lvy walk (GSOICLW), is adopted to tackle this problem. It is more biologically realistic than GSO, in which intraspecific competition (IC) and lvy walk (LW) are incorporated in the original GSO. IC and LW of GSOICLW are capable of achieving superior balance between global and local searching, i.e., GSOICLW maintains GSOs global searching ability to avoid entrapping in local optima while improves local searching near the global optima. The standard IEEE 30-bus power system is employed to carry out the simulation study to test GSOICLW, which is subsequently compared with other evolutionary algorithms (EAs). Simulation results show that GSOICLW outperforms other \\{EAs\\} used in this research and also provides accurate and reliable optimization results in dealing with the OPF problem for ESD.

Y.Z. Li; M.S. Li; Q.H. Wu

2014-01-01T23:59:59.000Z

415

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

Science Journals Connector (OSTI)

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

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

2013-01-01T23:59:59.000Z

416

Performance characteristics of a turbo expander substituted for expansion valve on air-conditioner  

Science Journals Connector (OSTI)

An experimental study is conducted on a small turbo expander which could be applied to the expansion process in place of expansion valves in refrigerator or air-conditioner to improve the cycle efficiency by recovering energy from the throttling process. The operating gas is \\{HFC134a\\} and the maximum cooling capacity of experiment apparatus is 32.7kW. Four different turbo expanders are tested to find the performance characteristics of the turbo expander when they operate at a low partial admission rate. The partial admission rate is 1.70% or 2.37, and expanders are operated in the supersonic flow. In the experiment, pressure and temperature are measured at 10 different locations in the experimental apparatus. In addition to these measurements, output power at the turbo expander is measured through a generator installed on a rotor shaft with the rotational speed. Performance data of the turbo expander are obtained at many part load operations by adjusting the output power of the generator. A maximum of 15.8% total-to-static efficiency is obtained when the pressure ratio and the partial admission ratio are 2.37 and 1.70%, respectively. Experimental results show that the optimal velocity ratio decreases when the pressure ratio is decreased, and peak efficiencies, which are obtained at locally maximized efficiency depending on the operating condition, vary linearly against the subcooling temperature or the pressure ratio.

Soo-Yong Cho; Chong-Hyun Cho; Chaesil Kim

2008-01-01T23:59:59.000Z

417

Performance characteristics of a turbo expander substituted for expansion valve on air-conditioner  

SciTech Connect

An experimental study is conducted on a small turbo expander which could be applied to the expansion process in place of expansion valves in refrigerator or air-conditioner to improve the cycle efficiency by recovering energy from the throttling process. The operating gas is HFC134a and the maximum cooling capacity of experiment apparatus is 32.7 kW. Four different turbo expanders are tested to find the performance characteristics of the turbo expander when they operate at a low partial admission rate. The partial admission rate is 1.70% or 2.37, and expanders are operated in the supersonic flow. In the experiment, pressure and temperature are measured at 10 different locations in the experimental apparatus. In addition to these measurements, output power at the turbo expander is measured through a generator installed on a rotor shaft with the rotational speed. Performance data of the turbo expander are obtained at many part load operations by adjusting the output power of the generator. A maximum of 15.8% total-to-static efficiency is obtained when the pressure ratio and the partial admission ratio are 2.37 and 1.70%, respectively. Experimental results show that the optimal velocity ratio decreases when the pressure ratio is decreased, and peak efficiencies, which are obtained at locally maximized efficiency depending on the operating condition, vary linearly against the subcooling temperature or the pressure ratio. (author)

Cho, Soo-Yong [Department of Mechanical and Aerospace Engineering (ReCAPT), Gyeongsang National University, 900 Gajoa-dong, Jinju 660-701 (Korea); Cho, Chong-Hyun [School of Mechanical and Aerospace Engineering, Gyeongsang National University, 900 Gajoa-dong, Jinju 660-701 (Korea); Kim, Chaesil [Department of Mechanical Engineering, Changwon National University, 9 Sarim-dong, Changwon 641-773 (Korea)

2008-09-15T23:59:59.000Z

418

RADIATIVE TRANSFER IN ULTRARELATIVISTIC OUTFLOWS  

SciTech Connect

Analytical and numerical solutions are obtained for the equation of radiative transfer in ultrarelativistic opaque jets. The solution describes the initial trapping of radiation, its adiabatic cooling, and the transition to transparency. Two opposite regimes are examined. (1) Matter-dominated outflow. Surprisingly, radiation develops enormous anisotropy in the fluid frame before decoupling from the fluid. The radiation is strongly polarized. (2) Radiation-dominated outflow. The transfer occurs as if radiation propagated in vacuum, preserving the angular distribution and the blackbody shape of the spectrum. The escaping radiation has a blackbody spectrum if (and only if) the outflow energy is dominated by radiation up to the photospheric radius.

Beloborodov, Andrei M., E-mail: amb@phys.columbia.edu [Physics Department and Columbia Astrophysics Laboratory, Columbia University, 538 West 120th Street New York, NY 10027 (United States)

2011-08-20T23:59:59.000Z

419

Florida Radiation Protection Act (Florida)  

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

The Department of Public Health is responsible for administering a statewide radiation protection program. The program is designed to permit development and utilization of sources of radiation for...

420

Radiation prevents much cancer  

Science Journals Connector (OSTI)

Evidence reviewed here supports the concept that chronic exposure to ionising radiation can dramatically decrease cancer incidence and mortality. This evidence includes an inverse relationship between radiation levels and cancer induction and/or mortality in: over 200 million people in the USA; 200 million people in India; 10,000 residents of Taipei who live in cobalt-60 contaminated homes; high radiation areas of Ramsar, Iran; 12 million person-years of exposed and carefully selected control nuclear workers; almost 300,000 homes with radon in the USA; non-smokers in high radon areas of Saxony, Germany.

T.D. Luckey

2007-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "thermostat radiator valve" 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

Biophysics and synchrotron radiation  

SciTech Connect

This book, contains contributions to the conference on Biophysics and Synchrotron Radiation held in July 1986 at Frascati. It is devoted to advances in the resolution of biological molecule structure obtainable through synchroton radiation studies. The use of synchroton radiation has firmly established x-ray spectroscopy of biological molecules. More detailed knowledge on the local structure of active sites of metalloproteins, as well as a number of studies on the interaction of metal ions with other important biological macromolecular systems are presented. This new method for protein structure analysis is a major improvement for the rapidly expanding field of protein engineering.

Bianconi, A.; Castellano, C.C.

1987-01-01T23:59:59.000Z

422

Miniaturized radiation chirper  

DOE Patents (OSTI)

The disclosure relates to a miniaturized radiation chirper for use with a small battery supplying on the order of 5 volts. A poor quality CdTe crystal which is not necessarily suitable for high resolution gamma ray spectroscopy is incorporated with appropriate electronics so that the chirper emits an audible noise at a rate that is proportional to radiation exposure level. The chirper is intended to serve as a personnel radiation warning device that utilizes new and novel electronics with a novel detector, a CdTe crystal. The resultant device is much smaller and has much longer battery life than existing chirpers.

Umbarger, C. John (Los Alamos, NM); Wolf, Michael A. (Los Alamos, NM)

1980-01-01T23:59:59.000Z

423

Composition for radiation shielding  

DOE Patents (OSTI)

A composition for use as a radiation shield. The shield has a depleted urum core for absorbing gamma rays and a bismuth coating for preventing chemical corrosion and absorbing gamma rays. Alternatively, a sheet of gadolinium may be positioned between the uranium core and the bismuth coating for absorbing neutrons. The composition is preferably in the form of a container for storing materials that emit radiation such as gamma rays and neutrons. The container is preferably formed by casting bismuth around a pre-formed uranium container having a gadolinium sheeting, and allowing the bismuth to cool. The resulting container is a structurally sound, corrosion-resistant, radiation-absorbing container.

Kronberg, James W. (Aiken, SC)

1994-01-01T23:59:59.000Z

424

The Intense Radiation Gas  

E-Print Network (OSTI)

We present a new dispersion relation for photons that are nonlinearly interacting with a radiation gas of arbitrary intensity due to photon-photon scattering. It is found that the photon phase velocity decreases with increasing radiation intensity, it and attains a minimum value in the limit of super-intense fields. By using Hamilton's ray equations, a self-consistent kinetic theory for interacting photons is formulated. The interaction between an electromagnetic pulse and the radiation gas is shown to produce pulse self-compression and nonlinear saturation. Implications of our new results are discussed.

M. Marklund; P. K. Shukla; B. Eliasson

2005-03-08T23:59:59.000Z

425

Ener-Gee Whiz Answers Your Questions: Thermostat Settings and...  

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

part of the solar hot water heating system later on? Ener-Gee Whiz: Most solar water heating systems will require a backup system for cloudy days or at times of increased demand,...

426

DRAFT October 4, 2007 Residential Thermostats: Comfort Controls in California  

E-Print Network (OSTI)

to move on from the concept of a simple open fire to a central heating system. They utilized under (the Electric Heat Regulator Co.) eventually became Ho (Appliance Standards). 2 #12;DRAFT October 4, 2007 A Brief Historical Perspective Although heating

427

ARM - Measurement - Backscattered radiation  

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

govMeasurementsBackscattered radiation govMeasurementsBackscattered radiation ARM Data Discovery Browse Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Measurement : Backscattered radiation The scattering of radiant energy into the hemisphere of space bounded by a plane normal to the direction of the incident radiation and lying on the same side as the incident ray. Categories Aerosols, Cloud Properties Instruments The above measurement is considered scientifically relevant for the following instruments. Refer to the datastream (netcdf) file headers of each instrument for a list of all available measurements, including those recorded for diagnostic or quality assurance purposes. ARM Instruments AOS : Aerosol Observing System IAP : In-situ Aerosol Profiles (Cessna Aerosol Flights)

428

Low Dose Radiation  

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

Ancient Salt Beds Ancient Salt Beds Repository Science Renewable Energy The WIPP Underground may be ideal to study effects of Very Low Dose Rates on Biological Systems Low Background Radiation Experiment We're all bathing in it. It's in the food we eat, the water we drink, the soil we tread and even the air we breathe. It's background radiation, it's everywhere and we can't get away from it. But what would happen if you somehow "pulled the plug" on natural background radiation? Would organisms suffer or thrive if they grew up without their constant exposure to background radiation? That's what a consortium of scientists conducting an experiment at the Waste Isolation Pilot Plant aim to find out. Despite being an underground repository for transuranic radioactive waste,

429

Radiation from accelerated branes  

Science Journals Connector (OSTI)

The radiation emitted by accelerated fundamental strings and D-branes is studied within the linear approximation to the supergravity limit of string theory. We show that scalar, gauge field and gravitational radiation is generically emitted by such branes. In the case where an external scalar field accelerates the branes, we derive a Larmor-type formula for the emitted scalar radiation and study the angular distribution of the outgoing energy flux. The classical radii of the branes are calculated by means of the corresponding Thompson scattering cross sections. Within the linear approximation, the interaction of the external scalar field with the velocity fields of the branes gives a contribution to the observed gauge field and gravitational radiation.

Mohab Abou-Zeid and Miguel S. Costa

2000-04-26T23:59:59.000Z

430

Radiation Induced Mammary Cancer  

Science Journals Connector (OSTI)

......Induced Mammary Cancer R.L. Ullrich * R.J. Preston # * Department of Radiation Therapy, University of Texas Medical Branch, Galveston, TX 77550 # Biology Division Oak Ridge National Laboratory Oak Ridge, TN 37831, U.S.A Over the last......

R.L. Ullrich; R.J. Preston

1991-12-01T23:59:59.000Z

431

Ionizing radiation detector  

DOE Patents (OSTI)

An ionizing radiation detector is provided which is based on the principle of analog electronic integration of radiation sensor currents in the sub-pico to nano ampere range between fixed voltage switching thresholds with automatic voltage reversal each time the appropriate threshold is reached. The thresholds are provided by a first NAND gate Schmitt trigger which is coupled with a second NAND gate Schmitt trigger operating in an alternate switching state from the first gate to turn either a visible or audible indicating device on and off in response to the gate switching rate which is indicative of the level of radiation being sensed. The detector can be configured as a small, personal radiation dosimeter which is simple to operate and responsive over a dynamic range of at least 0.01 to 1000 R/hr.

Thacker, Louis H. (Knoxville, TN)

1990-01-01T23:59:59.000Z

432

Flexible Composite Radiation Detector  

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

Flexible Composite Radiation Detector Flexible Composite Radiation Detector Flexible Composite Radiation Detector A flexible composite scintillator was prepared by mixing fast, bright, dense rare-earth doped powdered oxyorthosilicate (such as LSO:Ce, LSO:Sm, and GSO:Ce) scintillator with a polymer binder. Available for thumbnail of Feynman Center (505) 665-9090 Email Flexible Composite Radiation Detector A flexible composite scintillator was prepared by mixing fast, bright, dense rare-earth doped powdered oxyorthosilicate (such as LSO:Ce, LSO:Sm, and GSO:Ce) scintillator with a polymer binder. The binder is transparent to the scintillator emission. The composite is seamless and can be made large and in a wide variety of shapes. Importantly, the composite can be tailored to emit light in a spectral region that matches the optimum

433

Radiation Safety Training Basic Radiation Safety Training for  

E-Print Network (OSTI)

Radiation Safety Training Basic Radiation Safety Training for Sealed Source Users for Physics 461 & 462 Modern Physics Laboratory Spring 2007 #12;Radiation Safety Department, University of Tennessee Purpose: To provide basic radiation safety training to the users of sealed sources located

Dai, Pengcheng

434

Radiation Safety Training Basic Radiation Safety Training for  

E-Print Network (OSTI)

Radiation Safety Training Basic Radiation Safety Training for X-ray Users for Physics 461 & 462 Modern Physics Laboratory Spring 2007 #12;#12;Radiation Safety Department, University of Tennessee Protocol Title: Basic Radiation Safety Training for X-ray Users Drafted By: Chris Millsaps, RSS Reviewers

Dai, Pengcheng

435

Radiative Muon Capture  

Science Journals Connector (OSTI)

The theory of radiative muon capture is developed. The discussion includes both parity conserving and nonconserving effects. The Gell-Mann weak magnetic term and the induced pseudoscalar are included, along with comparable relativistic effects in the nucleons. The theory is applied to light nuclei and especially to the radiative Godfrey reaction ?-+C126??+?+B125. An experiment to detect the induced pseudoscalar directly is proposed.

Jeremy Bernstein

1959-08-01T23:59:59.000Z

436

Low Dose Radiation Program: Links - Agencies with Radiation Regulatory  

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

Agencies with Radiation Regulatory Concerns and Involvement Agencies with Radiation Regulatory Concerns and Involvement Biological Effects of Low Level Exposures (BELLE) Canadian Nuclear Safety Commission Center for Risk Excellence Health Protection Agency The Health Risks of Extraterrestrial Environments International Commission on Radiation Units and Measurements, Inc. International Commission on Radiological Protection (ICRP) International Radiation Protection Association (IRPA) NASA Space Radiation Program National Academy of Sciences (NAS) Nuclear and Radiation Studies Board National Aeronautics and Space Administration (NASA) NASA OBRR Task Book Publication National Council on Radiation Protection (NCRP) National Institute of Environmental Health Sciences (NIEHS) National Toxicology Program (NTP) Occupational Safety and Health Administration (OSHA)

437

Radiation and viral DNA  

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

Radiation and viral DNA Radiation and viral DNA Name: Loretta L Lamb Age: N/A Location: N/A Country: N/A Date: N/A Question: Can viral DNA be changed through exposure to radiation? If so, what type of radiation will do this? Can these irradiated viruses cause changes in the genome of any human cells they may infect? Can these (or any) viruses actually cause cancer, or do they merely act as triggering devices for cancer? Replies: In theory, any nucleic acid (viral or otherwise) can be changed by exposure to many kinds of radiation. Depending on the type of virus, these may then change the human cells that they infect. Although there are many different things that are being implicated in causing cancers, it looks like a fairly common model involves the sequential "knockout" of several human genes. Viruses may be one cause of such gene changes, radiation and other environmental causes may also contribute. Some of these changes may be inherited through families, so it becomes more likely that the environmental factors may happen to "hit" the right places in cells to cause cancers in these families. If you ask something more specific, perhaps I can focus my response a bit more

438

Radiative muon capture  

Science Journals Connector (OSTI)

It is shown by relating the transition amplitude of radiative muon capture to that of radiative pion capture, that the transition amplitude of radiative muon capture proposed recently by Hwang and Primakoff differs from the others mainly by Low's counter terms. Despite the fact that the "original" transition amplitude does not violate seriously the conservation of the hadronic electromagnetic current, Low's counter terms, as introduced via Low's prescription to secure the presence of small conservation-of-hadronic-electromagnetic-current-breaking terms, are confirmed to be of numerical importance. Further, it is found in the "elementary-particle" treatment of radiative muon capture that the uncertainty arising from the nuclear structure can be reduced to become negligible. Therefore, an exclusive radiative muon capture experiment can in principle differentiate the Hwang-Primakoff theory from the others and yet provide a comprehensive test of partial conservation of axial-vector current.RADIOACTIVITY Theories of radiative muon capture, linearity hypothesis versus Low's prescription; nuclear structure and PCAC.

W -Y. P. Hwang

1980-07-01T23:59:59.000Z

439

REPORT NO. 8 radiation hazards  

E-Print Network (OSTI)

REPORT NO. 8 REVISED guidance for the control of radiation hazards in uranium mining SEPTEMBER 1967 OF RADIATION HAZARDS IN URANIUM MINING SEPTEMBER 1967 Staff Report of the FEDERAL RADIATION COUNCIL #12;FEDERAL...... .... .._ _.... Section I. Introduction. . . Section II. The Radiation Environment AssociatedWith Uranium Mining. Section

440

Appendix G: Radiation HYDROGEN ATOM  

E-Print Network (OSTI)

. People are exposed to naturally occurring radiation constantly. For example, cosmic radiation; radon effects on the environment and biological systems. Radiation comes from natural and human-made sourcesAppendix G: Radiation #12;#12;P P P E E E N NN HYDROGEN ATOM DEUTERIUM ATOM TRITIUM ATOM HYDROGEN

Pennycook, Steve

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


441

Appendix A: Radiation HYDROGEN ATOM  

E-Print Network (OSTI)

. People are exposed to naturally occurring radiation constantly. For example, cosmic radiation; radon effects on the environment and biological systems. Radiation comes from natural and human-made sourcesAppendix A: Radiation #12;P P P E E E N NN HYDROGEN ATOM DEUTERIUM ATOM TRITIUM ATOM HYDROGEN

Pennycook, Steve

442

Proteasome Structures Affected by Ionizing Radiation  

Science Journals Connector (OSTI)

...Effect of ionizing radiation on 26S but...radiation doses, and immediately...the dose range 1 to 20 Gy...ionizing radiation induced a...38), ionizing radiation (39...over a wide range of radiation doses and further...

Milena Pervan; Keisuke S. Iwamoto; and William H. McBride

2005-07-01T23:59:59.000Z

443

Radiation delivery system and method  

DOE Patents (OSTI)

A radiation delivery system and method are described. The system includes a treatment configuration such as a stent, balloon catheter, wire, ribbon, or the like, a portion of which is covered with a gold layer. Chemisorbed to the gold layer is a radiation-emitting self-assembled monolayer or a radiation-emitting polymer. The radiation delivery system is compatible with medical catheter-based technologies to provide a therapeutic dose of radiation to a lesion following an angioplasty procedure.

Sorensen, Scott A. (Overland Park, KS); Robison, Thomas W. (Los Alamos, NM); Taylor, Craig M. V. (Jemez Springs, NM)

2002-01-01T23:59:59.000Z

444

Reducing Radiation Damage  

SciTech Connect

This talk describes the use of a modified treatment sequence, i.e., radiation dose, geometry, dwell time, etc., to mitigate some of the deleterious effects of cancer radiotherapy by utilizing natural cell repair processes. If bad side effects can be reduced, a more aggressive therapy can be put into place. Cells contain many mechanisms that repair damage of various types. If the damage can not be repaired, cells will undergo apoptosis (cell death). Data will be reviewed that support the fact that a small dose of radiation will activate damage repair genes within a cell. Once the mechanisms are fully active, they will efficiently repair the severe damage from a much larger radiation dose. The data ranges from experiments on specific cell cultures using microarray (gene chip) techniques to experiments on complete organisms. The suggested effect and treatment is consistent with the assumption that all radiation is harmful, no matter how small the dose. Nevertheless, the harm can be reduced. These mechanisms need to be further studied and characterized. In particular, their time dependence needs to be understood before the proposed treatment can be optimized. Under certain situations it is also possible that the deleterious effects of chemotherapy can be mitigated and the damage to radiation workers can be reduced.

Blankenbecler, Richard

2006-06-05T23:59:59.000Z

445

Low Dose Radiation Program: Links - Organizations Conducting Radiation  

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

Conducting Low Dose Radiation Research Conducting Low Dose Radiation Research DOE Low Dose Radiation Research Program DoReMi Integrating Low Dose Research High Level Expert Group (HLEG) on European Low Dose Risk Research Multidisciplinary European Low Dose Initiative (MELODI) RISC-RAD Radiosensitivity of Individuals and Susceptibility to Cancer induced by Ionizing Radiation United States Transuranium & Uranium Registries Organizations Conducting other Radiation Research Argonne National Laboratory (ANL) Armed Forces Radiology Research Institute (AFRRI) Atmospheric Radiation Measurement (ARM) Program Brookhaven National Laboratory (BNL) Center for Devices and Radiological Health (CDRH) Central Research Institute of Electric Power Industry (CRIEPI) Colorado State University Columbia University

446

Semiconductor radiation detector  

DOE Patents (OSTI)

A semiconductor detector for ionizing electromagnetic radiation, neutrons, and energetic charged particles. The detecting element is comprised of a compound having the composition I-III-VI.sub.2 or II-IV-V.sub.2 where the "I" component is from column 1A or 1B of the periodic table, the "II" component is from column 2B, the "III" component is from column 3A, the "IV" component is from column 4A, the "V" component is from column 5A, and the "VI" component is from column 6A. The detecting element detects ionizing radiation by generating a signal proportional to the energy deposited in the element, and detects neutrons by virtue of the ionizing radiation emitted by one or more of the constituent materials subsequent to capture. The detector may contain more than one neutron-sensitive component.

Bell, Zane W. (Oak Ridge, TN); Burger, Arnold (Knoxville, TN)

2010-03-30T23:59:59.000Z

447

Radiation Minimum Temperatures  

Science Journals Connector (OSTI)

Frost resulting from cooling of vegetation by nocturnal radiation is a serious agricultural problem. Because of the number of variables involved attacks on this problem from a purely theoretical point of view have met with only moderate success. It seems logical to suppose that an instrument might be devised which would speed up the natural radiation processes and enable an observer to obtain in a few hours a measure of the cooling which occurs naturally over a period of 12 to 14 hr. Such an instrument could serve as a frost warning device. This paper describes the construction of a radiation device and presents experimental evidence to show that it can be used as a predictor of freezing temperatures at vegetation level.

Francis K. Davis Jr.

1957-01-01T23:59:59.000Z

448

Audible radiation monitor  

SciTech Connect

This invention consists of a method and apparatus for monitoring ionizing radiation comprising radiation detectors in electrical connection with an isotopic analyzer and a device for producing chords to which each isotope is mapped so that the device produces a unique chord for each isotope. Preferably the chords are pleasing to the ear, except for chords representing unexpected isotopes, and are louder or softer depending on the level of radioactivity produced by each isotope, and musical instrument voices may be simulated in producing the chords as an aid to distinguishing similar-sounding chords. Because of the representation by chords, information regarding the level and composition of the radiation in an area can be conveyed to workers in that area more effectively and yet without distracting them.

Odell, D.M.C.

1992-12-31T23:59:59.000Z

449

Composition for radiation shielding  

DOE Patents (OSTI)

A composition for use as a radiation shield is disclosed. The shield has a depleted uranium core for absorbing gamma rays and a bismuth coating for preventing chemical corrosion and absorbing gamma rays. Alternatively, a sheet of gadolinium may be positioned between the uranium core and the bismuth coating for absorbing neutrons. The composition is preferably in the form of a container for storing materials that emit radiation such as gamma rays and neutrons. The container is preferably formed by casting bismuth around a pre-formed uranium container having a gadolinium sheeting, and allowing the bismuth to cool. The resulting container is a structurally sound, corrosion-resistant, radiation-absorbing container. 2 figs.

Kronberg, J.W.

1994-08-02T23:59:59.000Z

450

Tunable terahertz radiation source  

SciTech Connect

Terahertz radiation source and method of producing terahertz radiation, said source comprising a junction stack, said junction stack comprising a crystalline material comprising a plurality of self-synchronized intrinsic Josephson junctions; an electrically conductive material in contact with two opposing sides of said crystalline material; and a substrate layer disposed upon at least a portion of both the crystalline material and the electrically-conductive material, wherein the crystalline material has a c-axis which is parallel to the substrate layer, and wherein the source emits at least 1 mW of power.

Boulaevskii, Lev; Feldmann, David M; Jia, Quanxi; Koshelev, Alexei; Moody, Nathan A

2014-01-21T23:59:59.000Z

451

RADIATION ALERT User Manual  

E-Print Network (OSTI)

not contaminate the Inspector by touching it to radioactive surfaces or materials. If contamination is suspected Environmental Area Monitoring 16 Checking for Surface Contamination 16 5 Maintenance 17 Calibration 17, and x-ray radiation. Its applications include: · Detecting and measuring surface contamination

Haller, Gary L.

452

Radiation Source Replacement Workshop  

SciTech Connect

This report summarizes a Radiation Source Replacement Workshop in Houston Texas on October 27-28, 2010, which provided a forum for industry and researchers to exchange information and to discuss the issues relating to replacement of AmBe, and potentially other isotope sources used in well logging.

Griffin, Jeffrey W.; Moran, Traci L.; Bond, Leonard J.

2010-12-01T23:59:59.000Z

453

Solar energy: Radiation nation  

Science Journals Connector (OSTI)

... Australia receives more solar radiation per square metre, on average, than any other continent. Although turning this ... to make use of its heat. We spoke to Australian proponents of two very different solar-thermal systems, both rather confusingly known as ...

Carina Dennis

2006-09-06T23:59:59.000Z

454

Psoriasis and ultraviolet radiation  

SciTech Connect

Prevention and detection screening programs as a public health service in curtailing the ever-increasing incidence of all forms of skin cancer are reviewed. The effect of solar and artificial ultraviolet radiation on the general population and persons with psoriasis is examined. 54 refs.

Farber, E.M.; Nall, L. (Psoriasis Research Institute, Palo Alto, CA (United States))

1993-09-01T23:59:59.000Z

455

Local microwave background radiation  

E-Print Network (OSTI)

An inquiry on a possible local origin for the Microwave Background Radiation is made. Thermal MBR photons are contained in a system called {\\it magnetic bottle} which is due to Earth magnetic field and solar wind particles, mostly electrons. Observational tests are anticipated.

Domingos Soares

2014-11-13T23:59:59.000Z

456

Infrared radiation: Herschel revisited  

Science Journals Connector (OSTI)

The year 2000 marks the 200th anniversary of Herschels discovery of infrared radiation. Using a car light in place of the Sun and a liquid crystal sheet instead of thermometers the experiment is an effective classroom demonstration of invisible light.

Erin E. Pursell; Richard Kozlowski

2000-01-01T23:59:59.000Z

457

Radiation detector spectrum simulator  

DOE Patents (OSTI)

A small battery operated nuclear spectrum simulator having a noise source nerates pulses with a Gaussian distribution of amplitudes. A switched dc bias circuit cooperating therewith generates several nominal amplitudes of such pulses and a spectral distribution of pulses that closely simulates the spectrum produced by a radiation source such as Americium 241.

Wolf, Michael A. (Los Alamos, NM); Crowell, John M. (Los Alamos, NM)

1987-01-01T23:59:59.000Z

458

Radiation detector spectrum simulator  

DOE Patents (OSTI)

A small battery operated nuclear spectrum simulator having a noise source generates pulses with a Gaussian distribution of amplitudes. A switched dc bias circuit cooperating therewith to generate several nominal amplitudes of such pulses and a spectral distribution of pulses that closely simulates the spectrum produced by a radiation source such as Americium 241.

Wolf, M.A.; Crowell, J.M.

1985-04-09T23:59:59.000Z

459

Assessing exposure to radiation  

SciTech Connect

Since the founding of Lawrence Livermore National Laboratory, we have been world leaders in evaluating the risks associated with radiation. Ultrasensitive tools allow us not only to measure radionuclides present in the body but also to reconstruct the radiation dose from past nuclear events and to project the levels of radiation that will still be present in the body for 50 years after the initial intake. A variety of laboratory procedures, including some developed here, give us detailed information on the effects of radiation at the cellular level. Even today, we are re-evaluating the neutron dose resulting from the bombing at Hiroshima. Our dose reconstruction and projection capabilities have also been applied to studies of Nagasaki, Chernobyl, the Mayak industrial complex in the former Soviet Union, the Nevada Test Site, Bikini Atoll, and other sites. We are evaluating the information being collected on individuals currently working with radioactive material at Livermore and elsewhere as well as previously collected data on workers that extends back to the Manhattan Project.

Walter, K.

1997-01-01T23:59:59.000Z

460

Invariant formulation for dispersed transverse isotropy in aortic heart valves: An efficient means for modeling fiber splay  

SciTech Connect

Most soft tissues possess an oriented architecture of collagen fiber bundles, conferring both anisotropy and nonlinearity to their elastic behavior. Transverse isotropy has often been assumed for a subset of these tissues that have a single macroscopically-identifiable preferred fiber direction. Micro-structural studies, however, suggest that, in some tissues, collagen fibers are approximately normally distributed about a mean preferred fiber direction. Structural constitutive equations that account for this dispersion of fibers have been shown to capture the mechanical complexity of these tissues quite well. Such descriptions, however, are computationally cumbersome for two-dimensional (2D) fiber distributions, let alone for fully three-dimensional (3D) fiber populations. In this paper, we develop a new constitutive law for such tissues, based on a novel invariant theory for dispersed transverse isotropy. The invariant theory is based on a novel closed-form ''splay invariant'' that can easily handle 3D fiber populations, and that only requires a single parameter in the 2D case. The model is polyconvex and fits biaxial data for aortic valve tissue as accurately as the standard structural model. Modification of the fiber stress-strain law requires no re-formulation of the constitutive tangent matrix, making the model flexible for different types of soft tissues. Most importantly, the model is computationally expedient in a finite-element analysis, demonstrated by modeling a bioprosthetic heart valve.

Freed, Alan D.; Einstein, Daniel R.; Vesely, Ivan

2005-11-01T23:59:59.000Z

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


461

ACS WFC CCD Radiation Test: The Radiation Environment  

E-Print Network (OSTI)

of external surfaces by naturally occurring atomic oxygen. CCD detectors are particularly vulnerable to damage damage. A comprehensive discussion of the types of radiation damage known to occur in CCDs is beyond1 ACS WFC CCD Radiation Test: The Radiation Environment Michael R. Jones Space Telescope Science

Sirianni, Marco

462

Nanoscale Engineering Of Radiation Tolerant Silicon Carbide....  

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

Engineering Of Radiation Tolerant Silicon Carbide. Nanoscale Engineering Of Radiation Tolerant Silicon Carbide. Abstract: Radiation tolerance is determined by how effectively the...

463

Annual DOE Occupational Radiation Exposure Reports | Department...  

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

Annual DOE Occupational Radiation Exposure Reports Annual DOE Occupational Radiation Exposure Reports September 24, 2013 Annual DOE Occupational Radiation Exposure | 2012 Report...

464

Occupational Radiation Exposure | Department of Energy  

Energy Savers (EERE)

Radiation Exposure Welcome The Occupational Radiation Exposure Information page on this web page is intended to provide the latest available information on radiation exposure to...

465

Energy Efficiency and Conservation Block Grant Program  

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

NH-County-Belknap NH-County-Belknap Location: County NH American Recovery and Reinvestment Act: Proposed Action or Project Description: 1) Energy efficiency retrofits in County facilities, including building envelope improvements, thermostatically controlled radiator valves w/set-back capability, connect Old Wing Heating System to New Wing Heating System in the County Jail, and Water & Energy Conservation Measures throughout all County facilities (including Courthouse, built in 1893) and 2) upgrade building automation system in Nursing Home and replace hot water boilers in the County Jail. Conditions: None Categorical Exclusion(s) Applied: B2.5, B5.1 *-For the complete DOE National Environmental Policy Act regulations regarding categorical exclusions, see Subpart D of 10 CFR10 21

466

CX-001274: Categorical Exclusion Determination | Department of Energy  

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

274: Categorical Exclusion Determination 274: Categorical Exclusion Determination CX-001274: Categorical Exclusion Determination Energy Efficiency Retrofits CX(s) Applied: B2.5, B5.1 Date: 12/10/2009 Location(s): Belknap, New Hampshire Office(s): Energy Efficiency and Renewable Energy Energy Efficiency and Conservation Block Grant for: Energy efficiency retrofits in County facilities, including building envelope improvements, thermostatically controlled radiator valves with set-back capability, connect Old Wing Heating System to New Wing Heating System in the County Jail, and Water and Energy Conservation Measures throughout all County facilities (including Courthouse, built in 1893). DOCUMENT(S) AVAILABLE FOR DOWNLOAD CX-001274.pdf More Documents & Publications CX-005795: Categorical Exclusion Determination

467

CX-005795: Categorical Exclusion Determination | Department of Energy  

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

5795: Categorical Exclusion Determination 5795: Categorical Exclusion Determination CX-005795: Categorical Exclusion Determination New Hampshire-County-Belknap CX(s) Applied: B2.5, B5.1 Date: 05/02/2011 Location(s): Belknap, New Hampshire Office(s): Energy Efficiency and Renewable Energy Energy Efficiency and Conservation Block Grant Program. 1) Energy efficiency retrofits in County facilities, including building envelope improvements, thermostatically controlled radiator valves w/set-back capability, connect Old Wing Heating System to New Wing Heating System in the County Jail, and Water and Energy Conservation Measures throughout all County facilities (including Courthouse, built in 1893) and 2) upgrade building automation system in Nursing Home and replace hot water boilers in the County Jail.

468

Acceleration and Classical Electromagnetic Radiation  

E-Print Network (OSTI)

Classical radiation from an accelerated charge is reviewed along with the reciprocal topic of accelerated observers detecting radiation from a static charge. This review commemerates Bahram Mashhoon's 60th birthday.

E. N. Glass

2008-01-09T23:59:59.000Z

469

Mathematical Problems of Radiative Equilibrium  

Science Journals Connector (OSTI)

... in turn with the cases of purely absorbing and grey material in local radiative equilibrium (Schwarzschild-Milne model) and that of monochromatic radiative equilibrium with scattering but zero emissivity (Schuster ...

1935-01-12T23:59:59.000Z

470

Health Physicist (Radiation Protection Specialist)  

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

A successful candidate in this position will serve as the Health Physicist (Radiation Protection Specialist) senior subject matter expert for health physics/radiation safety at the sites. You will...

471

Nuclear radiation electronic gear (continued)  

Science Journals Connector (OSTI)

Nuclear radiation electronic gear (continued) ... Examines nuclear instrumentation available from several major U.S. manufacturers. ... Nuclear / Radiochemistry ...

S. Z. Lewin

1961-01-01T23:59:59.000Z

472

DOE Radiation Records Contacts List  

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

DOE radiation records contact list for individuals to obtain records of occupational exposure directly from a DOE site.

473

Gamma radiation field intensity meter  

DOE Patents (OSTI)

A gamma radiation intensity meter measures dose rate of a radiation field. The gamma radiation intensity meter includes a tritium battery emitting beta rays generating a current which is essentially constant. Dose rate is correlated to an amount of movement of an electroscope element charged by the tritium battery. Ionizing radiation decreases the voltage at the element and causes movement. A bleed resistor is coupled between the electroscope support element or electrode and the ionization chamber wall electrode. 4 figs.

Thacker, L.H.

1995-10-17T23:59:59.000Z

474

Gamma radiation field intensity meter  

DOE Patents (OSTI)

A gamma radiation intensity meter measures dose rate of a radiation field. The gamma radiation intensity meter includes a tritium battery emitting beta rays generating a current which is essentially constant. Dose rate is correlated to an amount of movement of an electroscope element charged by the tritium battery. Ionizing radiation decreases the voltage at the element and causes movement. A bleed resistor is coupled between the electroscope support element or electrode and the ionization chamber wall electrode. 4 figs.

Thacker, L.H.

1994-08-16T23:59:59.000Z

475

Gamma radiation field intensity meter  

DOE Patents (OSTI)

A gamma radiation intensity meter measures dose rate of a radiation field. The gamma radiation intensity meter includes a tritium battery emitting beta rays generating a current which is essentially constant. Dose rate is correlated to an amount of movement of an electroscope element charged by the tritium battery. Ionizing radiation decreases the voltage at the element and causes movement. A bleed resistor is coupled between the electroscope support element or electrode and the ionization chamber wall electrode.

Thacker, Louis H. (Knoxville, TN)

1995-01-01T23:59:59.000Z

476

Gamma radiation field intensity meter  

DOE Patents (OSTI)

A gamma radiation intensity meter measures dose rate of a radiation field. The gamma radiation intensity meter includes a tritium battery emitting beta rays generating a current which is essentially constant. Dose rate is correlated to an amount of movement of an electroscope element charged by the tritium battery. Ionizing radiation decreases the voltage at the element and causes movement. A bleed resistor is coupled between the electroscope support element or electrode and the ionization chamber wall electrode.

Thacker, Louis H. (Knoxville, TN)

1994-01-01T23:59:59.000Z

477

Radiation Preservation of Food, Commercialization Technology and Economics in Radiation Processing  

Science Journals Connector (OSTI)

Radiation Preservation of Food, Commercialization Technology and Economics in Radiation Processing ...

H. F. Kraybill; D. C. Brunton

1960-05-01T23:59:59.000Z

478

Environment/Health/Safety (EHS): Radiation Protection Group: Radiation  

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

Who To Call Who To Call Rad Training Dosimetry Telemetry Laser Safety Radiation Safety Committee Pub-3000 Ch. 21 Forms RPG Procedures RPG Internal Radiation Safety Committee Charter Purpose The Berkeley Lab Radiation Safety Committee (RSC) is appointed by, and reports to, the Laboratory Director and is responsible for advising LBNL Management on all matters related to occupational and environmental radiation safety. The Radiation Safety Committee reviews and recommends approval of radiation safety policies and guides the Environment, Health and Safety Division and radiation user divisions in carrying out these programs. The scope of its actions will generally be in issues of broad institutional concern and impact, or areas of potential high consequence either in terms of safety or institutional needs.

479

BWR (boiling-water reactor) radiation control: In-plant demonstration at Vermont Yankee: Final report  

SciTech Connect

Results of the RP1934 program, which was established by EPRI in 1981 to demonstrate the adequacy of BRAC program (RP819) principles for BWR radiation control at Vermont Yankee, are presented. Evaluations were performed of the effectiveness of optimization of purification system performance, control of feedwater dissolved oxygen concentrations, minimization of corrosion product and ionic transport, and improved startup, shutdown, and layup practices. The impact on shutdown radiation levels of these corrective actions was assessed based on extensive primary system radiation survey and component gamma scan data. Implementation of the BRAC recommendations was found to be insufficient to reduce the rate of activity buildup on out-of-core surfaces at Vermont Yankee, and additional corrective actions were found necessary. Specifically, replacement of cobalt-bearing materials in the control rod drive pins and rollers and feedwater regulating valves was pursued as was installation of electropolished 316 stainless steel during a recirculation piping replacement program. Aggressive programs to further reduce copper concentrations in the reactor water by improving condensate demineralizer efficiency and to minimize organic ingress to the power cycle by reducing organic concentrations in recycled radwaste also were undertaken. Evaluations of the impact on activity buildup of several pretreatment processes including prefilming in moist air, preexposure to high temperature water containing zinc, and electropolishing also were performed in a test loop installed in the reactor water cleanup system. A significant beneficial impact of electropolishing was shown to be present for periods up to 6000 hours.

Palino, G.F.; Hobart, R.L.; Sawochka, S.G.

1987-10-01T23:59:59.000Z

480

Terahertz radiation mixer  

DOE Patents (OSTI)

A terahertz radiation mixer comprises a heterodyned field-effect transistor (FET) having a high electron mobility heterostructure that provides a gatable two-dimensional electron gas in the channel region of the FET. The mixer can operate in either a broadband pinch-off mode or a narrowband resonant plasmon mode by changing a grating gate bias of the FET. The mixer can beat an RF signal frequency against a local oscillator frequency to generate an intermediate frequency difference signal in the microwave region. The mixer can have a low local oscillator power requirement and a large intermediate frequency bandwidth. The terahertz radiation mixer is particularly useful for terahertz applications requiring high resolution.

Wanke, Michael C. (Albuquerque, NM); Allen, S. James (Santa Barbara, CA); Lee, Mark (Albuquerque, NM)

2008-05-20T23:59:59.000Z

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


481

Time encoded radiation imaging  

DOE Patents (OSTI)

The various technologies presented herein relate to detecting nuclear material at a large stand-off distance. An imaging system is presented which can detect nuclear material by utilizing time encoded imaging relating to maximum and minimum radiation particle counts rates. The imaging system is integrated with a data acquisition system that can utilize variations in photon pulse shape to discriminate between neutron and gamma-ray interactions. Modulation in the detected neutron count rates as a function of the angular orientation of the detector due to attenuation of neighboring detectors is utilized to reconstruct the neutron source distribution over 360 degrees around the imaging system. Neutrons (e.g., fast neutrons) and/or gamma-rays are incident upon scintillation material in the imager, the photons generated by the scintillation material are converted to electrical energy from which the respective neutrons/gamma rays can be determined and, accordingly, a direction to, and the location of, a radiation source identified.

Marleau, Peter; Brubaker, Erik; Kiff, Scott

2014-10-21T23:59:59.000Z

482

Radiation Emergency Procedure Demonstrations  

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

Managing Radiation Emergencies Managing Radiation Emergencies Procedure Demonstrations Procedure Demonstrations Note: RealPlayer is needed for listening to the narration that accompany these demonstrations. Real Player Dressing To Prevent the Spread of Radioactive Contamination This demonstration shows how your team can dress to prevent the spread of radioactive contamination. Click to begin presentation on dressing to prevent the spread of radioactive contamination. Preparing The Area This demonstration shows basic steps you can take to gather equipment and prepare a room to receive a patient who may be contaminated with radioactive material. Click to begin presentation on preparing a room to receive a radioactive contaminated patient. Removing Contaminated Clothing This demonstration shows the procedure for removing clothing from a patient who may be contaminated with radioactive material.

483

Semiconductor radiation detector  

DOE Patents (OSTI)

A semiconductor radiation detector is provided to detect x-ray and light photons. The entrance electrode is segmented by using variable doping concentrations. Further, the entrance electrode is physically segmented by inserting n+ regions between p+ regions. The p+ regions and the n+ regions are individually biased. The detector elements can be used in an array, and the p+ regions and the n+ regions can be biased by applying potential at a single point. The back side of the semiconductor radiation detector has an n+ anode for collecting created charges and a number of p+ cathodes. Biased n+ inserts can be placed between the p+ cathodes, and an internal resistor divider can be used to bias the n+ inserts as well as the p+ cathodes. A polysilicon spiral guard can be implemented surrounding the active area of the entrance electrode or surrounding an array of entrance electrodes.

Patt, Bradley E. (Sherman Oaks, CA); Iwanczyk, Jan S. (Los Angeles, CA); Tull, Carolyn R. (Orinda, CA); Vilkelis, Gintas (Westlake Village, CA)

2002-01-01T23:59:59.000Z

484

Aharonov-Bohm radiation  

SciTech Connect

A solenoid oscillating in vacuum will pair produce charged particles due to the Aharonov-Bohm (AB) interaction. We calculate the radiation pattern and power emitted for charged scalar particles. We extend the solenoid analysis to cosmic strings and find enhanced radiation from cusps and kinks on loops. We argue by analogy with the electromagnetic AB interaction that cosmic strings should emit photons due to the gravitational AB interaction of fields in the conical spacetime of a cosmic string. We calculate the emission from a kink and find that it is of similar order as emission from a cusp, but kinks are vastly more numerous than cusps and may provide a more interesting observational signature.

Jones-Smith, Katherine; Mathur, Harsh [CERCA, Department of Physics, Case Western Reserve University, Cleveland, Ohio 44106-7079 (United States); Vachaspati, Tanmay [CERCA, Department of Physics, Case Western Reserve University, Cleveland, Ohio 44106-7079 (United States); Institute for Advanced Study, Princeton, New Jersey 08540 (United States)

2010-02-15T23:59:59.000Z

485

Medical radiation protection in next decade  

Science Journals Connector (OSTI)

......towards increasing radiation safety levels. Whether...users whenever the radiation dose to the patient...human errors and software-related problems...global view of radiation protection in medicine...increasing radiation safety levels. Whether......

Madan M. Rehani; Eliseo Vano

2011-09-01T23:59:59.000Z

486

Materials Science and Engineering B 117 (2005) 5361 Finite element analysis-based design of a fluid-flow control nano-valve  

E-Print Network (OSTI)

of a fluid-flow control nano-valve M. Grujicica,, G. Caoa, B. Pandurangana, W.N. Royb a Department A finite element method-based procedure is developed for the design of molecularly functionalized nano-size devices. The procedure is aimed at the single-walled carbon nano-tubes (SWCNTs) used in the construction

Grujicic, Mica

487

Coherence in Spontaneous Radiation Processes  

Science Journals Connector (OSTI)

By considering a radiating gas as a single quantum-mechanical system, energy levels corresponding to certain correlations between individual molecules are described. Spontaneous emission of radiation in a transition between two such levels leads to the emission of coherent radiation. The discussion is limited first to a gas of dimension small compared with a wavelength. Spontaneous radiation rates and natural line breadths are calculated. For a gas of large extent the effect of photon recoil momentum on coherence is calculated. The effect of a radiation pulse in exciting "super-radiant" states is discussed. The angular correlation between successive photons spontaneously emitted by a gas initially in thermal equilibrium is calculated.

R. H. Dicke

1954-01-01T23:59:59.000Z

488

Mechanisms for left ventricular systolic dysfunction in aortic regurgitation: Importance for predicting the functional response to aortic valve replacement  

Science Journals Connector (OSTI)

To test the hypothesis that the combined use of the time-varying distance concept and conventional circumferential stress-shortening relations would elucidate differential mechanisms for left ventricular systolic dysfunction in severe, chronic aortic regurgitation and therefore predict the functional responses to aortic valve replacement, 31 control patients and 37 patients with aortic regurgitation were studied. The studies included micromanometer left ventricular pressure determinations, biplane contrast cineangiograms under control conditions and radionuclide angiograms under control conditions and during methoxamine or nitroprusside infusions with right atrial pacing. The patients with aortic regurgitation were classified into three groups: Group I had normal Emax and stress-shortening relations, Group II had abnormal Emax but normal stress-shortening relations and Group III had abnormal Emax and stress-shortening relations. The left ventricular end-diastolic and end-systolic volumes showed a progressive increase and the ejection fraction showed a progressive decrease from Group I to III; these values differed from those in the control patients (p < 0.001). In Group I, then was a decrease in left ventricular volumes (p < 0.05) but no significant change in ejection fraction (61 7% versus 63 4%) after aortic valve replacement. In contrast, in Group II, reduction in left ventricular volumes (p < 0.01) was associated with an increase in ejection fraction from 50 8% to 64 11% (p < 0.01). Finally, in Group III, reduction in left ventricular volumes (p < 0.05) was associated with a further decrement in ejection fraction from 35 13% to 30 13%. Group I patients had compensated adequately for chronic volume overload. However, Group II had left ventricular dysfunction that was associated with an increase in the left ventricular volume/mass ratio compared with that in the control patients and Group I (p < 0.05 for both), suggesting inadequate hypertrophy and assumption of spherical geometry. Finally, irreversible myocardial dysfunction had supervened in Group III. In conclusion, a combined analysis of left ventricular chamber performance using the time-varying elastance concept and myocardial performance using conventional circumferential stress-shortening relations provides complementary information that elucidates differential mechanisms for left ventricular systolic dysfunction and therefore predicts the functional response to aortic valve replacement.

Mark R. Starling; Marvin M. Kirsh; Daniel G. Montgomery; Milton D. Gross

1991-01-01T23:59:59.000Z

489

Method for microbeam radiation therapy  

DOE Patents (OSTI)

A method is disclosed of performing radiation therapy on a patient, involving exposing a target, usually a tumor, to a therapeutic dose of high energy electromagnetic radiation, preferably X-ray radiation. The dose is in the form of at least two non-overlapping microbeams of radiation, each microbeam having a width of less than about 1 millimeter. Target tissue exposed to the microbeams receives a radiation dose during the exposure that exceeds the maximum dose that such tissue can survive. Non-target tissue between the microbeams receives a dose of radiation below the threshold amount of radiation that can be survived by the tissue, and thereby permits the non-target tissue to regenerate. The microbeams may be directed at the target from one direction, or from more than one direction in which case the microbeams overlap within the target tissue enhancing the lethal effect of the irradiation while sparing the surrounding healthy tissue. No Drawings

Slatkin, D.N.; Dilmanian, F.A.; Spanne, P.O.

1994-08-16T23:59:59.000Z

490

Anisotropic radiation elds: causality and quantum statistics  

E-Print Network (OSTI)

radiation transport 5 2.1 Radiation transport equation . . . . . . . . . . . . . . . . . . 5 2.2 Closures The transport of radiation through a medium is described by the radiation transport equation for the radiative is used to describe anisotropic radiation. Because the two moment equations do not form a closed set

Honingh, Aline

491

Influence of Extraterrestrial Radiation on Radiation Portal Monitors  

SciTech Connect

Cosmic radiation and solar flares can be a major source of background radiation at the Earths surface. This paper examines the relationship between extraterrestrial radiation and the detectable background in radiation portal monitors used for homeland security applications. Background radiation data from 13 radiation portal monitor facilities are examined and compared against external sources of data related to extraterrestrial radiation, including measurements at neutron monitors located at 53 cosmic-ray observatories around the Earth, four polar orbiting satellites, three geostationary satellites, ground-based geomagnetic field data from observatories around the Earth, a solar magnetic index, solar radio flux data, and sunspot activity data. Four-years (January 2003 through December 2006) of data are used in this study, which include the latter part of Solar Cycle 23 as solar activity was on the decline. The analysis shows a significant relationship between some extraterrestrial radiation and the background detected in the radiation portal monitors. A demonstrable decline is shown in the average gamma ray and neutron background at the radiation portal monitors as solar activity declined over the period of the study.

Keller, Paul E.; Kouzes, Richard T.

2009-06-01T23:59:59.000Z

492

Lesson 4 - Ionizing Radiation | Department of Energy  

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

4 - Ionizing Radiation 4 - Ionizing Radiation Lesson 4 - Ionizing Radiation Lesson Three showed that unstable isotopes emit energy as they become more stable. This energy is known as radiation. This lesson explores forms of radiation, where radiation is found, how we detect and measure radiation, what sources of radiation people are exposed to, whether radiation is harmful, and how we can limit our exposure. Specific topics covered in this lesson include: Types of radiation Non-ionizing Ionizing Forms of ionizing radiation Alpha particles Beta particles Gamma rays Radiation Decay chain Half-life Dose Radiation measurements Sources of radiation Average annual exposure Lesson 4 - Ionizing Radiation.pptx More Documents & Publications DOE-HDBK-1130-2008 DOE-HDBK-1130-2008 DOE-HDBK-1130-2007

493

ARM ARM Atmospheric Radiation Measurement Atmospheric Radiation Measurement  

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

An Integrated Column Description An Integrated Column Description of the Atmosphere An Integrated Column Description of the Atmosphere Tom Ackerman Chief Scientist Tom Ackerman Chief Scientist ARM ARM Atmospheric Radiation Measurement Atmospheric Radiation Measurement Pacific Northwest National Laboratory Pacific Northwest National Laboratory The "other" Washington ARM ARM Atmospheric Radiation Measurement Atmospheric Radiation Measurement Credits to Credits to * Ric Cederwall * Xiquan Dong * Chuck Long * Jay Mace * Mark Miller * Robin Perez * Dave Turner and the rest of the ARM science team * Ric Cederwall * Xiquan Dong * Chuck Long * Jay Mace * Mark Miller * Robin Perez * Dave Turner and the rest of the ARM science team ARM ARM Atmospheric Radiation Measurement Atmospheric Radiation Measurement Outline Outline * A little philosophy

494

Chronic Low Dose Radiation Effects on Radiation Sensitivity  

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

Chronic Low Dose Radiation Effects on Radiation Sensitivity Chronic Low Dose Radiation Effects on Radiation Sensitivity and Chromosome Instability Induction in TK6 Cells Schwartz J.L. 1 , Jordan R. 1 , Slovic J. 1 , Moruzzi A. 1 , Kimmel R. 2 , and Liber, H.L. 3 1 University of Washington, Seattle, WA; 2 Fred Hutchinson Cancer Research Center, Seattle, WA; 3 Colorado State University, Fort Collins, Colorado There are a number of cell responses that can be detected after low dose radiation exposures including the adaptive response, low dose hypersensitivity, and induced genomic instability. The relationship between these different phenomena is unknown. In this study, we measured adaptive responses, low dose hypersensitivity, and induced genomic instability in a human B-lymphoblastoid cell model, TK6, where we could genetically modify radiation responses by either over-expression of BCL-2 or deletion of TP53. TK6

495

Closed bore XMR (CBXMR) systems for aortic valve replacement: Investigation of rotating-anode x-ray tube heat loadability  

SciTech Connect

In order to improve the safety and efficacy of percutaneous aortic valve replacement procedures, a closed bore hybrid x-ray/MRI (CBXMR) system is proposed in which an x-ray C-arm will be positioned with its isocenter {approx_equal}1 m from the entrance of a clinical MRI scanner. This system will harness the complementary strengths of both modalities to improve clinical outcome. A key component of the CBXMR system will be a rotating anode x-ray tube to produce high-quality x-ray images. There are challenges in positioning an x-ray tube in the magnetic fringe field of the MRI magnet. Here, the effects of an external magnetic field on x-ray tube induction motors of radiography x-ray tubes and the corresponding reduction of x-ray tube heat loadability are investigated. Anode rotation frequency f{sub anode} was unaffected when the external magnetic field B{sub b} was parallel to the axis of rotation of the anode but decreased when B{sub b} was perpendicular to the axis of rotation. The experimental f{sub anode} values agreed with predicted values to within {+-}3% over a B{sub b} range of 0-30 mT. The MRI fringe field at the proposed location of the x-ray tube mounted on the C-arm ({approx_equal}4 mT) reduced f{sub anode} by only 1%, so x-ray tube heat loadability will not be compromised when using CBXMR systems for percutaneous aortic valve replacement procedures. Eddy current heating power in the rotor due to an MRI fringe field was found to be two orders of magnitude weaker than the heating power produced on the anode due to a fluoroscopic exposure, so eddy current heating had no effect on x-ray tube heat loadability.

Bracken, John A.; Lillaney, Prasheel V.; Fahrig, Rebecca; Rowlands, J. A. [Sunnybrook Health Sciences Center, Department of Medical Biophysics, University of Toronto, 2075 Bayview Avenue, Toronto, Ontario M4N 3M5 (Canada); Department of Radiology, Lucas MRS Center, Stanford University, 1201 Welch Road, Stanford, California 94305-5488 (United States); Sunnybrook Health Sciences Center, Department of Medical Biophysics, University of Toronto, 2075 Bayview Avenue, Toronto, Ontario M4N 3M5 (Canada)

2008-09-15T23:59:59.000Z

496

RADIATION LABORATO DISCLAIMER  

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

R : R : . . . RADIATION LABORATO DISCLAIMER This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency Thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any

497

Radiation imaging apparatus  

DOE Patents (OSTI)

A radiation imaging system using a charge multiplier and a position sensitive anode in the form of periodically arranged sets of interconnected anode regions for detecting the position of the centroid of a charge cloud arriving thereat from the charge multiplier. Various forms of improved position sensitive anodes having single plane electrode connections are disclosed. Various analog and digital signal processing systems are disclosed, including systems which use the fast response of microchannel plates, anodes and preamps to perform scintillation pulse height analysis digitally. 15 figs.

Anger, H.O.; Martin, D.C.; Lampton, M.L.

1983-07-26T23:59:59.000Z

498

Radiation imaging apparatus  

DOE Patents (OSTI)

A radiation imaging system using a charge multiplier and a position sensitive anode in the form of periodically arranged sets of interconnected anode regions for detecting the position of the centroid of a charge cloud arriving thereat from the charge multiplier. Various forms of improved position sensitive anodes having single plane electrode connections are disclosed. Various analog and digital signal processing systems are disclosed, including systems which use the fast response of microchannel plates, anodes and preamps to perform scintillation pulse height analysis digitally.

Anger, Hal O. (Berkeley, CA); Martin, Donn C. (Berkeley, CA); Lampton, Michael L. (Berkeley, CA)

1983-01-01T23:59:59.000Z

499

Los Alamos Lab: Radiation Protection: Annual Occupational Radiation  

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

Annual Occupational Radiation Dosimetry Report Print information on Annual Occupational Radiation Dosimetry Report (pdf). This webpage provides information to help you understand the dose quantities being reported to you on your Annual Occupational Radiation Dosimetry Report. If you would like general information about radiation exposure, please refer to www.radiationanswers.org. Title 10 Code of Federal Regulation Part 835, Occupational Radiation Protection (10 CFR 835), requires assessment, recording and reporting of radiation doses to individuals who are exposed to sources of radiation or radioactive contamination. This includes assessing external exposure from a variety of radiation types, such as, beta, photon, and neutron radiation. External exposures may be uniform over the whole body or occur in a non-uniform (i.e., limited body location) fashion. Internal doses occur when radioactive material is taken into the body through ingestion, inhalation, absorption or wounds. The requirements include assessing doses to the whole body, skin, lens of the eyes, extremities and various organs and tissues.

500

Measurement of radiation impedance of stepped piston radiator  

Science Journals Connector (OSTI)

It was noted in a paper given in 1972 [A. H. Lubell J. Acoust. Soc. Am. 52 1310 (1972)] that the radiation mass of a stepped piston underwater loudspeaker was approximately half of the value expected from simple piston theory. Recently the integral equation approach was used to compute the radiation impedance for the Lubell Laboratories model 98 underwater loudspeaker and new measurements were made. This paper reviews the measurement and data reduction procedures and compares measured and theoretical radiation impedances. The original observation of reduced radiation mass is supported. A companion paper covers the integral equation computation. [This work was supported by Lubell Laboratories Inc.

Alan H. Lubell

1986-01-01T23:59:59.000Z