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Note: This page contains sample records for the topic "air recirculation delay" from the National Library of EnergyBeta (NLEBeta).
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1

Effect of room air recirculation delay on the decay rate of tracer gas  

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

Effect of room air recirculation delay on the decay rate of tracer gas Effect of room air recirculation delay on the decay rate of tracer gas Title Effect of room air recirculation delay on the decay rate of tracer gas Publication Type Conference Proceedings Year of Publication 2004 Authors Kristoffersen, Astrid H., Ashok J. Gadgil, and David M. Lorenzetti Conference Name 9th International Conference on Air Distribution in Rooms - RoomVent 2004, Pagination pp 6 Date Published September 5-8, 2 Conference Location Coimbra, Portugal Abstract Tracer gas measurements are commonly used to estimate the fresh air exchange rate in a room or building. Published tracer decay methods account for fresh air supply, infiltration, and leaks in ductwork. However, the time delay associated with a ventilation system recirculating tracer back to the room also affects the decay rate. We present an analytical study of tracer gas decay in a well-mixed, mechanically-ventilated room with recirculation. The analysis shows that failing to account for delays can lead to under- or over-estimates of the fresh air supply, depending on whether the decay rate calculation includes the duct volume

2

Effect of room air recirculation delay on the decay rate of tracer gas  

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

Effect of room air recirculation delay on the decay rate of tracer gas Effect of room air recirculation delay on the decay rate of tracer gas concentration Title Effect of room air recirculation delay on the decay rate of tracer gas concentration Publication Type Journal Article Year of Publication 2007 Authors Lorenzetti, David M., Astrid H. Kristoffersen, and Ashok J. Gadgil Journal Indoor Air Pagination 7 Keywords recirculating ventilation, tracer decay rate Abstract Tracer gas measurements are used to estimate the flow rate of fresh air into a room or building. These methods commonly account for the decay of tracer gas concentration as the result of ventilation air supply and infiltration, using a well-mixed model of the space. Some researchers also have considered the effect of leakage in the ventilation ductwork. This paper considers the effect of recirculation through ventilation ducts on the calculated fresh air supply rate. Transport delay in the ducts can significantly alter the time evolution of tracer concentration, and hence alter the estimated air change rate.

3

Recirculating electric air filter  

DOE Patents (OSTI)

An electric air filter cartridge has a cylindrical inner high voltage electrode, a layer of filter material, and an outer ground electrode formed of a plurality of segments moveably connected together. The outer electrode can be easily opened to remove or insert filter material. Air flows through the two electrodes and the filter material and is exhausted from the center of the inner electrode.

Bergman, W.

1985-01-09T23:59:59.000Z

4

Adaptive Air Charge Estimation for Turbocharged Diesel Engines without Exhaust Gas Recirculation  

E-Print Network (OSTI)

Adaptive Air Charge Estimation for Turbocharged Diesel Engines without Exhaust Gas Recirculation an adaptive observer for in-cylinder air charge estimation for turbocharged diesel engines without exhaust gas (734) 764-4256 1 #12;Storset et al.- Adaptive Air Charge Est. for TC Diesel Engines 2 1 Introduction

Stefanopoulou, Anna

5

Air Charge Control for Turbocharged Spark Ignition Engines with Internal Exhaust Gas Recirculation  

E-Print Network (OSTI)

, the turbocharger wastegate, and the Variable Valve Timing (VVT) system are three actuators in the air path systemAir Charge Control for Turbocharged Spark Ignition Engines with Internal Exhaust Gas Recirculation of transient cylin- der charge control, based on a cycle-averaged mean-value model for a turbocharged spark

Stefanopoulou, Anna

6

Wind Effect, Recirculation and Thermal Flow Field of a Direct Air?cooled Condenser for a Large Power Plant  

Science Journals Connector (OSTI)

The thermal effect experiments were carried out of a direct air?cooled system in the low speed wind tunnel. The influence of effect factors on recirculation is also discussion after that the relationship between the thermal flow field structure and recirculation ratio under the cooling tower is analyzed. At last the engineering measures to reduce or avoid recirculation are proposed. For certain conditions the experimental measurement shows close agreement with numerical values.

W. L. Zhao; P. Q. Liu; H. S. Duan; J. Y. Zhu

2011-01-01T23:59:59.000Z

7

Recirculation of Factory Heat and Air to Reduce Energy Consumption  

E-Print Network (OSTI)

-makeup ventilation systems. First we must distinguish between gaseous and particulate contaminants in order to select appropriate types of air cleaning equipment. Next the physical (and chemical) char acteristics of those specific contaminants must be considered... particles. (Note that most gases and vapors are colorless and invisible ?...suspended particulates are almost the only visible air con taminants .) Because the chemical vapor pressure of the nuisance contaminants which create visibly polluted factory...

Thiel, G. R.

1983-01-01T23:59:59.000Z

8

Recirculation of In-Plant Air at General Motors  

E-Print Network (OSTI)

(fitted around the drum itself) is a coarse fiber, non-woven polyester and is designed for use in oil mist and smoke applications. This inner layer holds the outside media away from the drum keeping it from contacting the expanded metal; thus... for cleaning up the in-plant environment at GM is the rotary drum filter. This rotary drum filter is an air cleaning unit manufactured by two indus trial concerns. It consists of an expanded metal drum fitted with two layers of media. The inner layer...

McKibben, V. L.

1983-01-01T23:59:59.000Z

9

Practical delay modeling of externally recirculated burned gas fraction for Spark-Ignited Engines  

E-Print Network (OSTI)

. INTRODUCTION AND COMPARISON WITH DIESEL EXHAUST GAS RECIRCULATION To prevent the malicious knock phenomenon. Scheme of the intake burned gas fraction dynamics. In the seemingly similar context of automotive Diesel

10

Wind tunnel simulation of exhaust recirculation in an air-cooling system at a large power plant  

Science Journals Connector (OSTI)

The recirculation of hot exhaust air and its dependence on wind direction was investigated as a cause of reduced efficiency in an air-cooled condenser (ACC). A method of simulating exhaust air recirculation at an ACC platform using a wind tunnel is presented, and applied to a proposed ACC addition at an existing power plant. It was found that wind speed and the height of an ACC platform have a significant impact on recirculation. Wind direction was also found to be significant, due to the interference of the buildings adjacent to the ACC platform. The mechanisms that cause recirculation are presented and analyzed, and the characteristics of the recirculating flow are described. It was found that when considering additions to existing power plants, the distance of the new ACC and power plant from the original buildings and structures has only a minor effect on the recirculation of the added ACC platform. Wind tunnel simulation is recommended in the initial design stage of new or renovated power plants with ACC systems to minimize exhaust recirculation.

Zhifu Gu; Xuerei Chen; William Lubitz; Yan Li; Wenlin Luo

2007-01-01T23:59:59.000Z

11

Experimental Study of the Circulation Air Volume of Recirculation Evaporative Cooling  

E-Print Network (OSTI)

ICEBO2006, Shenzhen, China HVAC Technologies for Energy Efficiency, Vol. IV-11-3 Experimental Study of the Circulation Air Volume of Recirculation Evaporative Cooling 1 Jun Xiong ZeHua Liu Chao Wang GuoJie Chen Bachelor Senior.... Pre-design and design tools for evapora- tive cooling[J]. ASHRAE Transaction: Symposia. 2001.Vol. 107 part1: 501-510. [5] LiangShi Ding, JianJun Wang, MingJian Jiang. Investigations of the thermal performance of in- direct evaporative plate heat...

Xiong, J.; Liu, Z.; Wang, C.; Chen, G.

2006-01-01T23:59:59.000Z

12

Power plant including an exhaust gas recirculation system for injecting recirculated exhaust gases in the fuel and compressed air of a gas turbine engine  

DOE Patents (OSTI)

A power plant is provided and includes a gas turbine engine having a combustor in which compressed gas and fuel are mixed and combusted, first and second supply lines respectively coupled to the combustor and respectively configured to supply the compressed gas and the fuel to the combustor and an exhaust gas recirculation (EGR) system to re-circulate exhaust gas produced by the gas turbine engine toward the combustor. The EGR system is coupled to the first and second supply lines and configured to combine first and second portions of the re-circulated exhaust gas with the compressed gas and the fuel at the first and second supply lines, respectively.

Anand, Ashok Kumar; Nagarjuna Reddy, Thirumala Reddy; Shaffer, Jason Brian; York, William David

2014-05-13T23:59:59.000Z

13

Ignition Delay Times of Kerosene(Jet-A)/Air Mixtures  

E-Print Network (OSTI)

Ignition of Jet-A/air mixtures was studied behind reflected shock waves. Heating of shock tube at temperature of 150 C was used to prepare a homogeneous fuel mixture. Ignition delay times were measured from OH emission at 309 nm and from absorption of He-Ne laser radiation at 3.3922 micrometers. The conditions behind shock waves were calculated by one-dimensional shock wave theory from initial conditions T1, P1, mixture composition and incident shock wave velocity. The ignition delay times were obtained at two fixed pressures 10, 20 atm for lean, stoichiometric and rich mixtures (ER=0.5, 1, 2) at an overall temperature range of 1040-1380 K.

Zhukov, V P; Starikovskii, A Yu

2012-01-01T23:59:59.000Z

14

Effect of heat recirculation on the self-sustained catalytic combustion of propane/air mixtures in a quartz reactor  

SciTech Connect

The self-sustained catalytic combustion of propane is experimentally studied in a two-pass, quartz heat-recirculation reactor (HRR) and compared to that in a no (heat) recirculation reactor (NRR). Structured monolithic reactors with Pt/{gamma}-Al{sub 2}O{sub 3}, LaMnO{sub 3}/{gamma}-Al{sub 2}O{sub 3}, and Pt doped perovskite catalysts have been compared in the HRR and NRR configurations. Heat recirculation enhances combustion stability, by widening the operating window of self-sustained operation, and changes the mode of stability loss from blowout to extinction. It is found that thermal shields (upstream and downstream of the monolith) play no role in the stability of a HRR but increase the stability of a NRR. The stability of a HRR follows this trend: Pt/{gamma}-Al{sub 2}O{sub 3} > doped perovskite > LaMnO{sub 3}/{gamma}-Al{sub 2}O{sub 3}. Finally, a higher cell density monolith enlarges the operating window of self-sustained combustion, and allows further increase of the power density of the process. (author)

Scarpa, A. [Dipartimento di Ingegneria Chimica, Universita degli Studi di Napoli ''Federico II'', P.le V. Tecchio 80, 80125 Naples (Italy); Department of Chemical Engineering, Center for Catalytic Science and Technology (CCST), and Center for Composite Materials (CCM), University of Delaware, 150 Academy Street, Newark, DE 19716 (United States); Pirone, R. [Istituto di Ricerche sulla Combustione-CNR, P.le V. Tecchio 80, 80125 Naples (Italy); Russo, G. [Dipartimento di Ingegneria Chimica, Universita degli Studi di Napoli ''Federico II'', P.le V. Tecchio 80, 80125 Naples (Italy); Vlachos, D.G. [Department of Chemical Engineering, Center for Catalytic Science and Technology (CCST), and Center for Composite Materials (CCM), University of Delaware, 150 Academy Street, Newark, DE 19716 (United States)

2009-05-15T23:59:59.000Z

15

Noise of cleanroom recirculation systems  

Science Journals Connector (OSTI)

Recirculation air systems are used by the microelectronics industry as the primary source of unidirectional air flow in cleanrooms. The commonly used recirculation systems include: (1) packaged air handlers which include centrifugal or plug (plenum) fans generally located at fan deck level above the cleanroom; (2) fan?tower recirculation systems consisting most often of vertically mounted vaneaxial fans arranged along the cleanroom perimeter; (3) individual fan?filter units in which the HEPA or ULPA filters are combined with small direct drive blowers supported by the ceiling suspension system; and (4) minienvironments which create superclean conditions around individual tools within a less clean ‘‘ballroom.’’ In this paper the commonly used recirculation systems will be described typical sound power levels and spectrum characteristics of the systems will be presented the natural noise attenuation along the air flow paths will be listed the theoretical models for predicting noise levels in a cleanroom will be introduced and noise mitigation means which can be integrated into different systems will be discussed. Also presented will be the typical noise levels measured in operating cleanrooms.

Mei Q. Wu; Colin G. Gordon

1998-01-01T23:59:59.000Z

16

Exhaust gas recirculation in a homogeneous charge compression ignition engine  

DOE Patents (OSTI)

A homogeneous charge compression ignition engine operates by injecting liquid fuel directly in a combustion chamber, and mixing the fuel with recirculated exhaust and fresh air through an auto ignition condition of the fuel. The engine includes at least one turbocharger for extracting energy from the engine exhaust and using that energy to boost intake pressure of recirculated exhaust gas and fresh air. Elevated proportions of exhaust gas recirculated to the engine are attained by throttling the fresh air inlet supply. These elevated exhaust gas recirculation rates allow the HCCI engine to be operated at higher speeds and loads rendering the HCCI engine a more viable alternative to a conventional diesel engine.

Duffy, Kevin P. (Metamora, IL); Kieser, Andrew J. (Morton, IL); Rodman, Anthony (Chillicothe, IL); Liechty, Michael P. (Chillicothe, IL); Hergart, Carl-Anders (Peoria, IL); Hardy, William L. (Peoria, IL)

2008-05-27T23:59:59.000Z

17

Three-dimensional numerical simulation of settling and resuspension of solids in storage tanks with air injection recirculators  

SciTech Connect

Transient three-dimensional finite-difference numerical modeling of flow with settling solids in a 3.7 x 10/sup 3/ m/sup 3/ tank was performed. The number-average diameter of the particles was 15..mu..m and nominal volumetric concentration was 24 percent. Using dilute suspension, concentration dependent viscosity, and settling velocity assumption, modeled air lift circulators were shown to be sufficient to maintain solids in suspension during normal operation. Resuspension of solids was also shown to be accomplished by impulsive circulator startup in the absence of particle agglomeration. Settling velocity was shown to be a dominant parameter under the assumptions made.

Eyler, L.L.

1984-01-01T23:59:59.000Z

18

EXHAUST GAS RECIRCULATION  

E-Print Network (OSTI)

EXHAUST GAS RECIRCULATION (EGR) COOLER TESTING Southwest Research Institute® #12;overnment environmental regulations for diesel engine emissions are becoming increas- ingly stringent, and are driving) and oxides of nitrogen (NOx). The use of exhaust gas recirculation (EGR) coolers is considered

Chapman, Clark R.

19

Exhaust gas recirculation system for an internal combustion engine  

DOE Patents (OSTI)

An exhaust gas recirculation system for an internal combustion engine comprises an exhaust driven turbocharger having a low pressure turbine outlet in fluid communication with an exhaust gas conduit. The turbocharger also includes a low pressure compressor intake and a high pressure compressor outlet in communication with an intake air conduit. An exhaust gas recirculation conduit fluidly communicates with the exhaust gas conduit to divert a portion of exhaust gas to a low pressure exhaust gas recirculation branch extending between the exhaust gas recirculation conduit and an engine intake system for delivery of exhaust gas thereto. A high pressure exhaust gas recirculation branch extends between the exhaust gas recirculation conduit and the compressor intake and delivers exhaust gas to the compressor for mixing with a compressed intake charge for delivery to the intake system.

Wu, Ko-Jen

2013-05-21T23:59:59.000Z

20

Recirculating rotary gas compressor  

DOE Patents (OSTI)

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

Weinbrecht, J.F.

1992-02-25T23:59:59.000Z

Note: This page contains sample records for the topic "air recirculation delay" 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

Recirculating rotary gas compressor  

DOE Patents (OSTI)

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

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

1992-01-01T23:59:59.000Z

22

Experimental analysis of control loops with different delay times in the supply air system of a radiator test rig  

Science Journals Connector (OSTI)

The test rig of low-temperature hot-water radiator is a typical multi-input multi-output (MIMO) thermal system with large time delay. Aiming at the control of the supply air temperature and the temperature of the environmental chamber in the test rig, the paper carries out the fuzzy control experiments and PI control experiments based on adjusting the electric heater in the supply air system, in which there are two control loops with various delay time. The experiments researched two types of fuzzy control methods which are the basic fuzzy control (BFC), and the self-organizing rules fuzzy control (SORFC) with zero initial control rules. For the control loop of supply air temperature with short delay time, PI control performs better with fast convergence speed and small overshoot than the BFC and the SORFC. The convergence speed of the BFC method is lower than other two control methods. For the control loop of chamber temperature with long delay time, the SORFC has a satisfied control performance with less overshoot and stable error than the BFC and PI control.

Yongpan Chen; Jili Zhang; Zhen Lu; Tianyi Zhao; Hui Liu

2011-01-01T23:59:59.000Z

23

Recirculation of municipal landfill leachate  

E-Print Network (OSTI)

RECIRCULATION OF MUNICIPAL LANDFILL LEACHATE A Thesis by BRIAN JUDE PINKO4ISKI Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE May 1987 Major Subject...: Civil Engineering RECIRCULATION OF MUNICIPAL LANDFILL LEACHATE A Thesis by BRIAN JUDE PINKOWSKI Approved as to style and content by: Charles P. Giammona (Chair of Committee) Roy . Harm, (Member) Kirk W. Brown (Member) Donald A. Maxwel...

Pinkowski, Brian Jude

2012-06-07T23:59:59.000Z

24

Cyclone reactor with internal separation and axial recirculation  

DOE Patents (OSTI)

A cyclone combustor apparatus contains a circular partition plate containing a central circular aperture. The partition plate divides the apparatus into a cylindrical precombustor chamber and a combustor chamber. A coal-water slurry is passed axially into the inlet end of the precombustor chamber, and primary air is passed tangentially into said chamber to establish a cyclonic air flow. Combustion products pass through the partition plate aperture and into the combustor chamber. Secondary air may also be passed tangentially into the combustor chamber adjacent the partition plate to maintain the cyclonic flow. Flue gas is passed axially out of the combustor chamber at the outlet end and ash is withdrawn tangentially from the combuston chamber at the outlet end. A first mixture of flue gas and ash may be tangentially withdrawn from the combustor chamber at the outlet end and recirculated to the axial inlet of the precombustor chamber with the coal-water slurry. A second mixture of flue gas and ash may be tangentially withdrawn from the outlet end of the combustor chamber and passed to a heat exchanger for cooling. Cooled second mixture is then recirculated to the axial inlet of the precombustor chamber. In another embodiment a single cyclone combustor chamber is provided with both the recirculation streams of the first mixture and the second mixture.

Becker, Frederick E. (Reading, MA); Smolensky, Leo A. (Concord, MA)

1989-01-01T23:59:59.000Z

25

The effect of air charge temperature on performance, ignition delay and exhaust emissions of diesel engines using w/o emulsions as fuel  

SciTech Connect

Most of the work performed on the use of water/oil emulsions in diesel engines showed that increasing the water content in the emulsified fuel was effective in reducing NO/sub x/ and soot emissions. Unfortunately, the increase in water content in the emulsified fuel also increases the ignition delay and may cause diesel knock. One way to reduce the ignition delay is to increase the air charge temperature. In this study, the effect of increasing the air charge temperature on ignition delay, performance and exhaust emissions was investigated. The experiments were conducted on a CLR diesel engine using base-line diesel fuel number2 and stabilized macro-emulsions containing 15 percent, 30 percent and 45 percent water by volume.

Afify, E.M.; Korah, N.S.; Dickey, D.W.

1987-01-01T23:59:59.000Z

26

Recirculation in multiple wave conversions  

SciTech Connect

A one-dimensional multiple wave-conversion model is constructed that allows energy recirculation in ray phase space. Using a modular eikonal approach, the connection coefficients for this model are calculated by ray phase-space methods. Analytical results (confirmed numerically) show that all connection coefficients exhibit interference effects that depend on an interference phase, calculated from the coupling constants and the area enclosed by the intersecting rays. This conceptual model, which focuses on the topology of intersecting rays in phase space, is used to investigate how mode conversion between primary and secondary waves is modified by the presence of a tertiary wave.

Kaufman, A. N.; Brizard, A.J.; Kaufman, A.N.; Tracy, E.R.

2008-07-30T23:59:59.000Z

27

TANK MIXING STUDY WITH FLOW RECIRCULATION  

SciTech Connect

The primary objective of this work is to quantify the mixing time when two miscible fluids are mixed by one recirculation pump and to evaluate adequacy of 2.5 hours of pump recirculation to be considered well mixed in SRS tanks, JT-71/72. The work scope described here consists of two modeling analyses. They are the steady state flow pattern analysis during pump recirculation operation of the tank liquid and transient species transport calculations based on the initial steady state flow patterns. The modeling calculations for the mixing time are performed by using the 99% homogeneity criterion for the entire domain of the tank contents.

Lee, S.

2014-06-25T23:59:59.000Z

28

Property:Recirculating | Open Energy Information  

Open Energy Info (EERE)

Recirculating Recirculating Jump to: navigation, search Property Name Recirculating Property Type String Pages using the property "Recirculating" Showing 25 pages using this property. (previous 25) (next 25) 1 1.5-ft Wave Flume Facility + No + 10-ft Wave Flume Facility + No + 5 5-ft Wave Flume Facility + No + 6 6-ft Wave Flume Facility + No + A Alden Large Flume + Yes + Alden Small Flume + No + B Bucknell Hydraulic Flume + Yes + C Carderock 2-ft Variable Pressure Cavitation Water Tunnel + Yes + Carderock 3-ft Variable Pressure Cavitation Water Tunnel + Yes + Carderock Large Cavitation Tunnel + Yes + Carderock Subsonic Wind Tunnel + Yes + Conte Large Flume + No + Conte Small Flume + No + D DeFrees Flume 1 + No + DeFrees Flume 2 + No + DeFrees Flume 3 + No +

29

Suction-recirculation device for stabilizing particle flows within a solar powered solid particle receiver  

DOE Patents (OSTI)

A suction-recirculation device for stabilizing the flow of a curtain of blackened heat absorption particles falling inside of a solar receiver with an open aperture. The curtain of particles absorbs the concentrated heat from a solar mirror array reflected up to the receiver on a solar power tower. External winds entering the receiver at an oblique angle can destabilize the particle curtain and eject particles. A fan and ductwork is located behind the back wall of the receiver and sucks air out through an array of small holes in the back wall. Any entrained particles are separated out by a conventional cyclone device. Then, the air is recirculated back to the top of the receiver by injecting the recycled air through an array of small holes in the receiver's ceiling and upper aperture front wall. Since internal air is recirculated, heat losses are minimized and high receiver efficiency is maintained. Suction-recirculation velocities in the range of 1-5 m/s are sufficient to stabilize the particle curtain against external wind speeds in excess of 10 m/s.

Kolb, Gregory J. (Albuquerque, NM)

2012-02-07T23:59:59.000Z

30

High gradient magnetic beneficiation of dry pulverized coal via upwardly directed recirculating fluidization  

DOE Patents (OSTI)

This invention relates to an improved device and method for the high gradient magnetic beneficiation of dry pulverized coal, for the purpose of removing sulfur and ash from the coal whereby the product is a dry environmentally acceptable, low-sulfur fuel. The process involves upwardly directed recirculating air fluidization of selectively sized powdered coal in a separator having sections of increasing diameters in the direction of air flow, with magnetic field and flow rates chosen for optimum separations depending upon particulate size.

Eissenberg, David M. (Oak Ridge, TN); Liu, Yin-An (Opelika, AL)

1980-01-01T23:59:59.000Z

31

Effect of Exhaust Gas Recirculation (EGR) on Diesel Engine Oil...  

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

Exhaust Gas Recirculation (EGR) on Diesel Engine Oil - Impact on Wear Effect of Exhaust Gas Recirculation (EGR) on Diesel Engine Oil - Impact on Wear Results of completed study on...

32

Building Efficiency and Indoor Air Quality - You Can Have Both  

E-Print Network (OSTI)

with added or special filtration. This allows more air to be recirculated but has specific limitations. Filters can remove large particulates and some chemical contaminants by changing the filter media. However, a minimum amount of fresh air, approximately 20...

Kettler, G. J.

1998-01-01T23:59:59.000Z

33

Selective Catalytic Reduction and Exhaust Gas Recirculation Systems...  

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

Catalytic Reduction and Exhaust Gas Recirculation Systems Optimization A patented EGR-SCR approach was shown to readily meet the 2010 EPA requirments for NOx and PM emisisons...

34

In-tank recirculating arsenic treatment system  

DOE Patents (OSTI)

A low-cost, water treatment system and method for reducing arsenic contamination in small community water storage tanks. Arsenic is removed by using a submersible pump, sitting at the bottom of the tank, which continuously recirculates (at a low flow rate) arsenic-contaminated water through an attached and enclosed filter bed containing arsenic-sorbing media. The pump and treatment column can be either placed inside the tank (In-Tank) by manually-lowering through an access hole, or attached to the outside of the tank (Out-of-Tank), for easy replacement of the sorption media.

Brady, Patrick V. (Albuquerque, NM); Dwyer, Brian P. (Albuquerque, NM); Krumhansl, James L. (Albuquerque, NM); Chwirka, Joseph D. (Tijeras, NM)

2009-04-07T23:59:59.000Z

35

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

36

NGL recovery being hiked by natural-gasoline recirculation  

SciTech Connect

Construction will be completed later this year at two compression plants operated by Lagoven, S.A., to install natural-gasoline recirculation to improve NGL recovery. The project is the result of a study of condensate-stream recirculation and absorber operations at the compression plants Tia Juana 2 (PCTJ-2) and Tia Juana 3 (PCTJ-3), offshore Lake Maracaibo in western Venezuela. The PCTJ-2 and PCTJ-3 gas compression plants have two systems: gas compression and NGL extraction. Previous analysis of the NGL extraction and fractionation processes of Lagoven determined that there are two practical and attractive alternatives for the recirculation of the condensate streams in PCTJ-2 and 3: recirculation of natural gasoline from the Ule LPG plant; recirculation of a conditioned condensate from the de-ethanizer tower of each plant. Both alternatives are discussed. Also described are fractionation capacity, and modifications for adding absorption and fractionation.

Rivas M, M.; Bracho, J.L. [Lagoven S.A., Maracaibo (Venezuela); Murray, J.E. [Murray (James E.), Corpus Christi, TX (United States)

1997-07-07T23:59:59.000Z

37

Recirculating Linac Accelerators For Future Muon Facilities  

SciTech Connect

Neutrino Factories (NF) and Muon Colliders (MC) require rapid acceleration of shortlived muons to multi-GeV and TeV energies. A Recirculating Linear Accelerator (RLA) that uses superconducting RF structures can provide exceptionally fast and economical acceleration to the extent that the focusing range of the RLA quadrupoles allows each muon to pass several times through each high-gradient cavity. A new concept of rapidly changing the strength of the RLA focusing quadrupoles as the muons gain energy is being developed to increase the number of passes that each muon will make in the RF cavities, leading to greater cost effectiveness. We discuss the optics and technical requirements for RLA designs, using RF cavities capable of simultaneous acceleration of both m+ and m- species. The design will include the optics for the multi-pass linac and droplet-shaped return arcs.

Yves Roblin, Alex Bogacz, Vasiliy Morozov, Kevin Beard

2012-04-01T23:59:59.000Z

38

Industrial Energy Conservation, Forced Internal Recirculation Burner  

SciTech Connect

The overall objective of this research project is to develop and evaluate an industrial low NOx burner for existing and new gas-fired combustion systems for intermediate temperature (1400 degree to 2000 degree F) industrial heating devices such as watertube boilers and process fluid heaters. A multi-phase effort is being pursued with decision points to determine advisability of continuance. The current contract over Phases II and III of this work. The objectives of each phase are as follows. Phase II - to design, fabricate, and evaluate prototype burners based on the Forced Internal Recirculation (FIR) concept. Phase III - to evaluate the performance of an FIR burner under actual operating conditions in a full-scale field test and establish the performance necessary for subsequent commercialization

Joseph Rabovitser

2003-06-19T23:59:59.000Z

39

Exhaust gas recirculation for advanced diesel combustion cycles  

Science Journals Connector (OSTI)

Abstract Modern diesel engines tend to utilize significantly large quantities of exhaust gas recirculation (EGR) and high intake pressures across the engine load range to meet \\{NOx\\} targets. At such high EGR rates, the combustion process and exhaust emissions tend to exhibit a marked sensitivity to small changes in the EGR quantity, resulting in unintended deviations from the desired engine performance characteristics (energy efficiency, emissions, stability). An accurate estimation of EGR and its effect on the intake dilution are, therefore, necessary to enable its application during transient engine operation or unstable combustion regimes. In this research, a detailed analysis that includes estimation of the transient (cycle-by-cycle) build-up of EGR and the time (engine cycles) required to reach the steady-state EGR operation has been carried out. One-step global equations to calculate the transient and steady-state gas concentrations in the intake and exhaust are proposed. The effects of engine load and intake pressure on EGR have been examined and explained in terms of intake charge dilution and in-cylinder excess-air ratio. The EGR analysis is validated against a wide range of empirical data that include low temperature combustion cycles, intake pressure and load sweeps. This research intends to not only formulate a clear understanding of EGR application for advanced diesel combustion but also to set forth guidelines for transient analysis of EGR.

Usman Asad; Ming Zheng

2014-01-01T23:59:59.000Z

40

Fault Tolerant Oxygen Control of a Diesel Engine Air System  

E-Print Network (OSTI)

Fault Tolerant Oxygen Control of a Diesel Engine Air System Rainer Nitsche Matthias Bitzer control problem of a Diesel engine air system having a jammed Exhaust Gas Recirculation (EGR) valve of the air system. Keywords: Fault tolerant control, Diesel engine, Air system, Model-based trajectory

Paris-Sud XI, Université de

Note: This page contains sample records for the topic "air recirculation delay" 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

Improved zinc electrode and rechargeable zinc-air battery  

DOE Patents (OSTI)

The invention comprises an improved rechargeable zinc-air cell/battery having recirculating alkaline electrolyte and a zinc electrode comprising a porous foam support material which carries the active zinc electrode material. 5 figs.

Ross, P.N. Jr.

1988-06-21T23:59:59.000Z

42

Use of low temperature blowers for recirculation of hot gases  

DOE Patents (OSTI)

An apparatus is described for maintaining motors at low operating temperatures during recirculation of hot gases in fuel cell operations and chemical processes such as fluidized bed coal gasification. The apparatus includes a means for separating the hot process gas from the motor using a secondary lower temperature gas, thereby minimizing the temperature increase of the motor and associated accessories.

Maru, H.C.; Forooque, M.

1982-08-19T23:59:59.000Z

43

Fish Health Management Considerations in Recirculating Aquaculture Systems -Part 1  

E-Print Network (OSTI)

Cooperating. Nick T. Place , Dean Introduction Recirculating aquaculture systems, also known as water reuse of the Fisheries and Aquatic Sciences Department, Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida. Original publication date August 2003. Revised May 2009. Reviewed

Watson, Craig A.

44

Evaluation of the Indoor Air Quality Procedure for Use in Retail Buildings  

E-Print Network (OSTI)

rating of the HVAC system’s particle filters is indicated inHVAC recirculation that accounts for particle removal by filtersHVAC penetration factor P H is driven by the filtration efficiency L, and that re-circulated air passes through the same filter

Dutton, Spencer M.

2014-01-01T23:59:59.000Z

45

Effect of Exhaust Gas Recirculation (EGR) on Diesel Engine Oil- Impact on Wear  

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

Results of completed study on the effect of four exhaust gas recirculation levels on diesel engine oil during standard test with an API Cummins M-11 engine.

46

Passive mode control in the recirculating planar magnetron  

SciTech Connect

Preliminary experiments of the recirculating planar magnetron microwave source have demonstrated that the device oscillates but is susceptible to intense mode competition due, in part, to poor coupling of RF fields between the two planar oscillators. A novel method of improving the cross-oscillator coupling has been simulated in the periodically slotted mode control cathode (MCC). The MCC, as opposed to a solid conductor, is designed to electromagnetically couple both planar oscillators by allowing for the propagation of RF fields and electrons through resonantly tuned gaps in the cathode. Using the MCC, a 12-cavity anode block with a simulated 1 GHz and 0.26 c phase velocity (where c is the speed of light) was able to achieve in-phase oscillations between the two sides of the device in as little as 30 ns. An analytic study of the modified resonant structure predicts the MCC's ability to direct the RF fields to provide tunable mode separation in the recirculating planar magnetron. The self-consistent solution is presented for both the degenerate even (in phase) and odd (180 Degree-Sign out of phase) modes that exist due to the twofold symmetry of the planar magnetrons.

Franzi, Matthew; Gilgenbach, Ronald; Lau, Y. Y.; Greening, Geoff; Zhang, Peng [Plasma, Pulsed Power, and Microwave Laboratory, Nuclear Engineering and Radiological Sciences Department, University of Michigan, Ann Arbor, Michigan 48109-2104 (United States); Hoff, Brad [Air Force Research Laboratory, Kirtland AFB, New Mexico 87117 (United States)

2013-03-15T23:59:59.000Z

47

NITROGEN REMOVAL FOR ON-SITE SEWAGE DISPOSAL: A RECIRCULATING SAND FILTER/ROCK TANK DESIGN  

E-Print Network (OSTI)

NITROGEN REMOVAL FOR ON-SITE SEWAGE DISPOSAL: A RECIRCULATING SAND FILTER/ROCK TANK DESIGN, C. G. McKiel ABSTRACT: The nitrogen removal abilities of recirculating sand filter/rock tank (RSF) systems and conventional septic tank/soil absorption trench systems were compared in a field laboratory

Gold, Art

48

"Self Cooled Recirculating Liquid Metal Plasma Facing Wall System"  

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

Self Cooled Recirculating Liquid Metal Plasma Facing Wall System" Self Cooled Recirculating Liquid Metal Plasma Facing Wall System" Inventor ..--.. Richard P. Majeski Disclosed is a design for a fully axisymmetric, fast flowing liquid lithium plasma facing "wall" or surface which, in its present form, is intended for implementation in a tokamak. The design employs JxB forces to form a free-surface flow along a guide wall at the outer boundary of the plasma. The implementation of the disclosure design includes a system for recirculating the liquid metal within the volume of the toroidal field coils using inductive pumping, an approach wich allows independent energizing of the wall-forming and recirculating pumping systems, cooling of the recirculating liquid using fluid heat exchange with a molten salt,

49

RECENT PROGRESS TOWARD A MUON RECIRCULATING LINEAR ACCELERATOR  

SciTech Connect

Both Neutrino Factories (NF) and Muon Colliders (MC) require very rapid acceleration due to the short lifetime of muons. After a capture and bunching section, a linac raises the energy to about 900 MeV, and is followed by one or more Recirculating Linear Accelerators (RLA), possibly followed by a Rapid Cycling Synchnotron (RCS) or Fixed-Field Alternating Gradient (FFAG) ring. A RLA reuses the expensive RF linac section for a number of passes at the price of having to deal with different energies within the same linac. Various techniques including pulsed focusing quadruopoles, beta frequency beating, and multipass arcs have been investigated via simulations to improve the performance and reduce the cost of such RLAs.

Slawomir Bogacz, Vasiliy Morozov, Yves Roblin, Kevin Beard

2012-07-01T23:59:59.000Z

50

Multipass Arc Lattice Design for Recirculating Linac Muon Accelerators  

SciTech Connect

Recirculating linear accelerators (RLA) are the most likely means to achieve rapid acceleration of short-lived muons to multi-GeV energies required for Neutrino Factories and TeV energies required for Muon Colliders. A drawback of this scheme is that a separate return arc is required for each passage of the muons through the linac. In the work described here, a novel arc optics based on a Non-Scaling Fixed Field Alternating Gradient (NSFFAG) lattice is developed, which would provide sufficient momentum acceptance to allow multiple passes (two or more consecutive energies) to be transported in one string of magnets. An RLA with significantly fewer arcs will reduce the cost. We will develop the optics and technical requirements to allow the maximum number of passes by using an adjustable path length to accurately control the returned beam to synchronize with the linac RF phase.

G.M. Wang, R.P. Johnson, S.A. Bogacz, D. Trbojevic

2009-05-01T23:59:59.000Z

51

Carbon fiber composite molecular sieve electrically regenerable air filter media  

DOE Patents (OSTI)

An electrically regenerable gas filter system includes a carbon fiber composite molecular sieve (CFCMS) filter medium. After a separate medium-efficiency pre-filter removes particulate from the supply air stream, the CFCMS filter sorbs gaseous air pollutants before the air is recirculated to the space. When saturated, the CFCMS media is regenerated utilizing a low-voltage current that is caused to pass through the filter medium. 3 figs.

Wilson, K.A.; Burchell, T.D.; Judkins, R.R.

1998-10-27T23:59:59.000Z

52

Analysis of non-adiabatic heat-recirculating combustors Paul D. Ronney  

E-Print Network (OSTI)

combustion are discussed. #12;1 Introduction Recently interest in heat-recirculating "excess enthalpy times more energy per unit mass than lithium-ion batteries, thus devices converting of fuel

53

High-Power Laser Pulse Recirculation for Inverse Compton Scattering-Produced Gamma-Rays  

SciTech Connect

Inverse Compton scattering of high-power laser pulses on relativistic electron bunches represents an attractive method for high-brightness, quasi-monoenergetic {gamma}-ray production. The efficiency of {gamma}-ray generation via inverse Compton scattering is severely constrained by the small Thomson scattering cross section. Furthermore, repetition rates of high-energy short-pulse lasers are poorly matched with those available from electron accelerators, resulting in low repetition rates for generated {gamma}-rays. Laser recirculation has been proposed as a method to address those limitations, but has been limited to only small pulse energies and peak powers. Here we propose and experimentally demonstrate an alternative method for laser pulse recirculation that is uniquely capable of recirculating short pulses with energies exceeding 1 J. Inverse Compton scattering of recirculated Joule-level laser pulses has a potential to produce unprecedented peak and average {gamma}-ray brightness in the next generation of sources.

Jovanovic, I; Shverdin, M; Gibson, D; Brown, C

2007-04-17T23:59:59.000Z

54

In situ treatment of VOCs by recirculation technologies  

SciTech Connect

The project described herein was conducted by Oak Ridge National Laboratory (ORNL) to identify processes and technologies developed in Germany that appeared to have near-term potential for enhancing the cleanup of volatile organic compound (VOC) contaminated soil and groundwater at DOE sites. Members of the ORNL research team identified and evaluated selected German technologies developed at or in association with the University of Karlsruhe (UoK) for in situ treatment of VOC contaminated soils and groundwater. Project activities included contacts with researchers within three departments of the UoK (i.e., Applied Geology, Hydromechanics, and Soil and Foundation Engineering) during fall 1991 and subsequent visits to UoK and private industry collaborators during February 1992. Subsequent analyses consisted of engineering computations, groundwater flow modeling, and treatment process modeling. As a result of these project efforts, two processes were identified as having near-term potential for DOE: (1) the vacuum vaporizer well/groundwater recirculation well and (2) the porous pipe/horizontal well. This document was prepared to summarize the methods and results of the assessment activities completed during the initial year of the project. The project is still ongoing, so not all facets of the effort are completely described in this document. Recommendations for laboratory and field experiments are provided.

Siegrist, R.L.; Webb, O.F.; Ally, M.R.; Sanford, W.E. [Oak Ridge National Lab., TN (US); Kearl, P.M.; Zutman, J.L. [Oak Ridge National Lab., Grand Junction, CO (US)

1993-06-01T23:59:59.000Z

55

The effects of unburned hydrocarbon recirculation on ignition and combustion during diesel engine cold starts  

Science Journals Connector (OSTI)

Abstract The exhaust gases contain large amounts of unburned hydrocarbons during cranking without combustion. The effects of unburned hydrocarbon recirculation on ignition and combustion during diesel engine cold starts were investigated using both experiments and simulations. Experiments were conducted on a single-cylinder DI (direct injection) diesel engine equipped with a common rail injection system. The amount of unburned hydrocarbon recirculation was jointly controlled by an EGR (exhaust gas recirculation) valve and a back pressure valve. The investigation showed that optimal opening of recirculation control valves allowed the first firing cycle to be advanced from 19 to 6 and reduced the duration of heavy smoke emission (opacity > 50%) by 77%. However, the enhancement to the in-cylinder LTR (low temperature reaction) decreased gradually as the amount of unburned hydrocarbon recirculation increased. An analysis of the chemical kinetics showed that the reaction intermediates present in unburned hydrocarbons, such as ketohydroperoxides, were the most significant factor in enhancing the LTR during non-firing cycles. At the same time, the substantial heat capacity of unburned hydrocarbons suppressed the LTR for higher recirculation rates.

Yi Cui; Haiyong Peng; Kangyao Deng; Lei Shi

2014-01-01T23:59:59.000Z

56

Device For Trapping Laser Pulses In An Optical Delay Line  

DOE Patents (OSTI)

A device for maintaining a high-energy laser pulse within a recirculating optical delay line for a period time to optimize the interaction of the pulse with an electron beam pulse train comprising closely spaced electron micropulses. The delay line allows a single optical pulse to interact with many of the electron micropulses in a single electron beam macropulse in sequence and for the introduction of additional optical pulses to interact with the micropulses of additional electron beam macropulses. The device comprises a polarization-sensitive beam splitter for admitting an optical pulse to and ejecting it from the delay line according to its polarization state, a Pockels cell to control the polarization of the pulse within the delay line for the purpose of maintaining it within the delay line or ejecting it from the delay line, a pair of focusing mirrors positioned so that a collimated incoming optical pulse is focused by one of them to a focal point where the pulse interacts with the electron beam and then afterwards the pulse is recollimated by the second focusing mirror, and a timing device which synchronizes the introduction of the laser pulse into the optical delay line with the arrival of the electron macropulse at the delay line to ensure the interaction of the laser pulse with a prescribed number of electron micropulses in sequence. In a first embodiment of the invention, the principal optical elements are mounted with their axes collinear. In a second embodiment, all principal optical elements are mounted in the configuration of a ring.

Yu, David U. L. (Rancho Palos Verdes, CA); Bullock, Donald L. (Los Angeles, CA)

1997-12-23T23:59:59.000Z

57

Ventilating characteristics of a recirculating air-curtain laboratory exhaust hood  

E-Print Network (OSTI)

to reduce this enrich- ment and provide more representative indications of average contami- nant concentration. Contam1nant Release Rate In order to generate contaminant levels to wh1ch the available instrumentation would readily respond, a propane... to reduce this enrich- ment and provide more representative indications of average contami- nant concentration. Contam1nant Release Rate In order to generate contaminant levels to wh1ch the available instrumentation would readily respond, a propane...

Janes, Dale Floyd

2012-06-07T23:59:59.000Z

58

Development of high temperature air combustion technology in pulverized fossil fuel fired boilers  

SciTech Connect

High temperature air combustion (HTAC) is a promising technology for energy saving, flame stability enhancement and NOx emission reduction. In a conventional HTAC system, the combustion air is highly preheated by using the recuperative or regenerative heat exchangers. However, such a preheating process is difficult to implement for pulverized fossil fuel fired boilers. In this paper, an alternative approach is proposed. In the proposed HTAC system, a special burner, named PRP burner is introduced to fulfill the preheating process. The PRP burner has a preheating chamber with one end connected with the primary air and the other end opened to the furnace. Inside the chamber, gas recirculation is effectively established such that hot flue gases in the furnace can be introduced. Combustible mixture instead of combustion air is highly preheated by the PRP burner. A series of experiments have been conducted in an industrial scale test facility, burning low volatile petroleum coke and an anthracite coal. Stable combustion was established for burning pure petroleum coke and anthracite coal, respectively. Inside the preheating chamber, the combustible mixture was rapidly heated up to a high temperature level close to that of the hot secondary air used in the conventional HTAC system. The rapid heating of the combustible mixture in the chamber facilitates pyrolysis, volatile matter release processes for the fuel particles, suppressing ignition delay and enhancing combustion stability. Moreover, compared with the results measured in the same facility but with a conventional low NOx burner, NOx concentration at the furnace exit was at the same level when petroleum coke was burnt and 50% less when anthracite was burnt. Practicability of the HTAC technology using the proposed approach was confirmed for efficiently and cleanly burning fossil fuels. 16 refs., 10 figs., 1 tab.

Hai Zhang; Guangxi Yue; Junfu Lu; Zhen Jia; Jiangxiong Mao; Toshiro Fujimori; Toshiyuki Suko; Takashi Kiga [Tsinghua University, Beijing (China). Department of Thermal Engineering

2007-07-01T23:59:59.000Z

59

Carbon fiber composite molecular sieve electrically regenerable air filter media  

DOE Patents (OSTI)

An electrically regenerable gas filter system includes a carbon fiber composite molecular sieve (CFCMS) filter medium. After a separate medium-efficiency pre-filter removes particulate from the supply airstream, the CFCMS filter sorbs gaseous air pollutants before the air is recirculated to the space. When saturated, the CFCMS media is regenerated utilizing a low-voltage current that is caused to pass through the filter medium.

Wilson, Kirk A. (Knoxville, TN); Burchell, Timothy D. (Oak Ridge, TN); Judkins, Roddie R. (Knoxville, TN)

1998-01-01T23:59:59.000Z

60

Multi-SISO Robust Crone Design for the Air Path Control of a Diesel Engine G. Colin*, P. Lanusse**, A. Louzimi*,  

E-Print Network (OSTI)

Multi-SISO Robust Crone Design for the Air Path Control of a Diesel Engine G. Colin*, P. Lanusse is the air path control of a turbocharged diesel engine with Exhaust Gas Recirculation (EGR). Simulation, considering the air path control, the manipulated variables are the wastegate and the EGR valve

Boyer, Edmond

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


61

The design and construction of an open channel recirculating water tank for the study of biological hydrocarbons .  

E-Print Network (OSTI)

??This project chronicles the design and construction of a small scale recirculating water tank for the purpose of studying biological hydrodynamics. Currently available systems were… (more)

Hennessey, Thomas V. (Thomas Vincent), III

2005-01-01T23:59:59.000Z

62

Air Corrosivity in U.S. Outdoor-Air-Cooled Data Centers is Similar to That  

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

Air Corrosivity in U.S. Outdoor-Air-Cooled Data Centers is Similar to That Air Corrosivity in U.S. Outdoor-Air-Cooled Data Centers is Similar to That in Conventional Data Centers Title Air Corrosivity in U.S. Outdoor-Air-Cooled Data Centers is Similar to That in Conventional Data Centers Publication Type Report LBNL Report Number LBNL-4951E Year of Publication 2011 Authors Coles, Henry C., Tae Won Han, Phillip N. Price, Ashok J. Gadgil, and William F. Tschudi Date Published 03/2011 Abstract There is a concern that environmental-contamination caused corrosion may negatively affect Information Technology (IT) equipment reliability. Nineteen data centers in the United States and two in India were evaluated using Corrosion Classification Coupons (CCC) to assess environmental air quality as it may relate IT equipment reliability. The data centers were of two basic types: "closed" and outside-air cooled. A closed data center provides cool air to the IT equipment using air conditioning in which only a small percentage of the recirculation air is "make-up" air continuously supplied from outside to meet human health requirements. An outside-air cooled data center uses outside air directly as the primary source for IT equipment cooling. Corrosion measuring coupons containing copper and silver metal strips were placed in both "closed" and outside-air cooled data centers. The coupons were placed at each data center (closed and outside-air cooled types) with the location categorized into three groups:

63

Next Generation Pressurized Oxy-Coal Combustion: High Efficiency and No Flue Gas Recirculation  

SciTech Connect

The Gas Technology Institute (GTI) has developed a pressurized oxy-coal fired molten bed boiler (MBB) concept, in which coal and oxygen are fired directly into a bed of molten coal slag through burners located on the bottom of the boiler and fired upward. Circulation of heat by the molten slag eliminates the need for a flue gas recirculation loop and provides excellent heat transfer to steam tubes in the boiler walls. Advantages of the MBB technology over other boilers include higher efficiency (from eliminating flue gas recirculation), a smaller and less expensive boiler, modular design leading to direct scalability, decreased fines carryover and handling costs, smaller exhaust duct size, and smaller emissions control equipment sizes. The objective of this project was to conduct techno-economic analyses and an engineering design of the MBB project and to support this work with thermodynamic analyses and oxy-coal burner testing. Techno-economic analyses of GTI’s pressurized oxy-coal fired MBB technology found that the overall plant with compressed CO2 has an efficiency of 31.6%. This is a significant increase over calculated 29.2% efficiency of first generation oxy-coal plants. Cost of electricity (COE) for the pressurized MBB supercritical steam power plant with CO2 capture and compression was calculated to be 134% of the COE for an air-coal supercritical steam power plant with no CO2 capture. This compares positively with a calculated COE for first generation oxy-coal supercritical steam power plants with CO2 capture and compression of 164%. The COE for the MBB power plant is found to meet the U.S. Department of Energy (DOE) target of 135%, before any plant optimization. The MBB power plant was also determined to be simpler than other oxy-coal power plants with a 17% lower capital cost. No other known combustion technology can produce higher efficiencies or lower COE when CO2 capture and compression are included. A thermodynamic enthalpy and exergy analysis found a number of modifications and adjustments that could provide higher efficiency and better use of available work. Conclusions from this analysis will help guide the analyses and CFD modeling in future process development. The MBB technology has the potential to be a disruptive technology that will enable coal combustion power plants to be built and operated in a cost effective way, cleanly with no carbon dioxide emissions. A large amount of work is needed to quantify and confirm the great promise of the MBB technology. A Phase 2 proposal was submitted to DOE and other sponsors to address the most critical MBB process technical gaps. The Phase 2 proposal was not accepted for current DOE support.

Rue, David

2013-09-30T23:59:59.000Z

64

Estimated Costs and Returns for Catfish Farms with Recirculating Ponds Along the Upper Texas Coast.  

E-Print Network (OSTI)

_TDOC ' Z TA24S.7 8873 NO.1704 - . , ., TEXAS A&M UNIVERSHY LIBRARY for Catfish Farms ' with Recirculating Ponds Along ? . . the Upper Texas Coast ~7'!K~fi~~~ation ? J. Charles Lee: Interim Director? The Texas A&M University System ? C...~J1ege Station, Texas :,. .,: (Blank Page in OrigiBal BuBetiol ' 1iJ. ~ ; :; . : . . / I Estimated Costs and Returns for Catfish Farms with Recirculating Ponds Along the Upper Texas Coast J.A.D. Lambregts, Marketing Manager for Niaid...

Lambregts, J.A.D.; Griffin, W.L.; Lacewell R.D.; Davis, J.T.; Clary, G.M.

1992-01-01T23:59:59.000Z

65

Hybrid heat exchange for the compression capture of CO2 from recirculated flue gas  

SciTech Connect

An approach proposed for removal of CO2 from flue gas cools and compresses a portion of a recirculated flue-gas stream, condensing its volatile materials for capture. Recirculating the flue gas concentrates SOx, H2O and CO2 while dramatically reducing N2 and NOx, enabling this approach, which uses readily available industrial components. A hybrid system of indirect and direct-contact heat exchange performs heat and mass transfer for pollutant removal and energy recovery. Computer modeling and experimentation combine to investigate the thermodynamics, heat and mass transfer, chemistry and engineering design of this integrated pollutant removal (IPR) system.

Oryshchyn, Danylo B.; Ochs, Thomas L.; Summers, Cathy A.

2004-01-01T23:59:59.000Z

66

New and Underutilized Technology: Liquid Desiccant Air Conditioner |  

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

Liquid Desiccant Air Conditioner Liquid Desiccant Air Conditioner New and Underutilized Technology: Liquid Desiccant Air Conditioner October 4, 2013 - 4:40pm Addthis The following information outlines key deployment considerations for liquid desiccant air conditioners (LDACs) within the Federal sector. Benefits Liquid desiccant air conditioners deeply dry air using natural gas, solar energy, waste heat, bio-fuel, or other fossil fuels to drive the system. By providing mostly latent cooling, the LDAC controls indoor humidity without overcooling and reheating. This unit is supplemented by an electric chiller or DX air conditioner that sensibly cools the building's recirculation air. The liquid desiccant is a concentrated salt solution that directly absorbs moisture. Application LDACs are applicable in hospital, office, prison, school, and service

67

Fish Health Management Considerations in Recirculating Aquaculture Systems -Part 2: Pathogens1  

E-Print Network (OSTI)

Introduction Recirculating aquaculture systems, also known as water reuse systems, have become more and more Sciences Department, Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida. Original publication date August 2003. Revised August 2009. Reviewed October 2012

Watson, Craig A.

68

A Numerical Model for the Dynamic Simulation of a Recirculation Single-Effect Absorption Chiller  

E-Print Network (OSTI)

A Numerical Model for the Dynamic Simulation of a Recirculation Single- Effect Absorption Chiller A dynamic model for the simulation of a new single-effect water/lithium bromide absorption chiller. Keywords: absorption; chiller; modelling; transient; water-lithium bromide; falling film hal-00713904

Paris-Sud XI, Université de

69

Original Research Article Influence of anodic gas recirculation on solid oxide fuel cells in a micro  

E-Print Network (OSTI)

Original Research Article Influence of anodic gas recirculation on solid oxide fuel cells utilization in the cell-stack should be reduced. Ã? 2014 Published by Elsevier Ltd. Introduction Solid-oxide Anode off-gas recycle a b s t r a c t The recycle of anode depleted gas has been employed in solid oxide

Nielsen, Mads Pagh

70

On thermoelectric power conversion from heat re-circulating combustion systems F. J. Weinberg  

E-Print Network (OSTI)

On thermoelectric power conversion from heat re-circulating combustion systems F. J. Weinberg for the Second Law heat engine cycles the maximum power that can be extracted is independent of layout Fax: 4420 7594 5604 Word count: 3750 Diags. equivalent: 1600 5350 #12;On thermoelectric power

71

Downhole delay assembly for blasting with series delay  

DOE Patents (OSTI)

A downhole delay assembly is provided which can be placed into a blasthole for initiation of explosive in the blasthole. The downhole delay assembly includes at least two detonating time delay devices in series in order to effect a time delay of longer than about 200 milliseconds in a round of explosions. The downhole delay assembly provides a protective housing to prevent detonation of explosive in the blasthole in response to the detonation of the first detonating time delay device. There is further provided a connection between the first and second time delay devices. The connection is responsive to the detonation of the first detonating time delay device and initiates the second detonating time delay device. A plurality of such downhole delay assemblies are placed downhole in unfragmented formation and are initiated simultaneously for providing a round of explosive expansions. The explosive expansions can be used to form an in situ oil shale retort containing a fragmented permeable mass of formation particles.

Ricketts, Thomas E. (Grand Junction, CO)

1982-01-01T23:59:59.000Z

72

Air Conditioning  

Science Journals Connector (OSTI)

Air Conditioning ... CHEMISTS and engineers use air conditioning as a valuable tool in more than two hundred industries. ... Air conditioning is a tool with many facets. ...

MARGARET INGELS

1938-02-10T23:59:59.000Z

73

New Air Cleaning Strategies for Reduced Commercial Building Ventilation Energy ? FY11 Final Report  

SciTech Connect

The research carried out in this project focuses on developing novel volatile organic compounds (VOCs) air cleaning technologies needed to enable energy-saving reductions in ventilation rates. we targeted a VOC air cleaning system that could enable a 50% reduction in ventilation rates. In a typical commercial HVAC system that provides a mixture of recirculated and outdoor air, a VOC air cleaner in the supply airstream must have a 15% to 20% VOC removal efficiency to counteract a 50% reduction in outdoor air supply.

Sidheswaran, Meera; Destaillats, Hugo; Cohn, Sebastian; Sullivan, Douglas P.; Fisk, William J.

2011-10-31T23:59:59.000Z

74

Spectroscopy of traceroute delays  

Science Journals Connector (OSTI)

We analyze delays of traceroute probes, i.e. packets that elicit ICMP TimeExceeded messages, for a full range of probe sizes up to 9000 bytes as observed on unloaded high-end routers. Our ultimate motivation is to use traceroute RTTs for Internet mapping ...

Andre Broido; Young Hyun; kc claffy

2005-03-01T23:59:59.000Z

75

LHC faces further delay  

Science Journals Connector (OSTI)

... An official announcement expected within days is likely to say that the Large Hadron Collider (LHC) will not begin providing data until November — more than a year after its ... providing data until November — more than a year after its planned start date. The LHC was seriously damaged during power tests in September last year (see 'Eight-month delay ...

Geoff Brumfiel

2009-02-09T23:59:59.000Z

76

Recirculating induction accelerator as a low-cost driver for heavy ion fusion  

SciTech Connect

As a fusion driver, a heavy ion accelerator offers the advantages of efficient target coupling, high reliability, and long stand-off focusing. While the projected cost of conventional heavy ion fusion (HIF) drivers based on multiple beam induction linacs are quite competitive with other inertial driver options, a driver solution which reduces the cost by a factor of two or more will make the case for HIF truly compelling. The recirculating induction accelerator has the potential of large cost reductions. For this reason, an intensive study of the recirculator concept was performed by a team from LLNL and LBL over the past year. We have constructed a concrete point design example of a 4 MJ driver with a projected efficiency of 35% and projected cost of less than 500 million dollars. A detailed report of our findings during this year of intensive studies has been recently completed. 3 refs., 2 figs., 2 tabs.

Barnard, J.J.; Newton, M.A.; Reginato, L.L.; Sharp, W.M.; Shay, H.D.; Yu, S.S.

1991-09-01T23:59:59.000Z

77

Air separation by the Moltox process  

SciTech Connect

The report describes results of a development program on a new and energy saving process for air separation. The Moltox process involves reversibly reacting oxygen in air with a recirculating salt solution, such that oxygen is extracted without depressurizing the remaining nitrogen. Energy savings of approximately 50% are indicated for this process compared to conventional cryogenic air separation. The development program consisted of design, construction, and operation of a 6 liter/minute pilot plant; optimization of the process flowsheet through computer modelling; investigation of engineering aspects of the process including corrosion, safety, and NO/sub x/ generation; and an economic comparison to conventional cryogenic practice. All objectives were satisfactorily achieved except for continuous operation of the pilot plant, and the modifications necessary to achieve that have been identified. Economically the Moltox process shows a substantial advantage over large scale cryogenic plants which are powered by fuel vice electricity.

Erickson, D. C.

1981-04-01T23:59:59.000Z

78

Standard cosmology delayed  

SciTech Connect

The introduction of a delay in the Friedmann equation of cosmological evolution is shown to result in the very early universe undergoing the necessary accelerated expansion in the usual radiation (or matter) dominated phase. Occurring even without a violation of the strong energy condition, this expansion slows down naturally to go over to the decelerated phase, namely the standard Hubble expansion. This may obviate the need for a scalar field driven inflationary epoch.

Choudhury, Debajyoti [Department of Physics and Astrophysics, University of Delhi, Delhi 110007 (India); Ghoshal, Debashis [School of Physical Sciences, Jawaharlal Nehru University, New Delhi 110067 (India); Sen, Anjan Ananda, E-mail: debajyoti.choudhury@gmail.com, E-mail: dghoshal@mail.jnu.ac.in, E-mail: anjan.ctp@jmi.ac.in [Centre for Theoretical Physics, Jamia Millia Islamia, New Delhi 110025 (India)

2012-02-01T23:59:59.000Z

79

Standard Cosmology Delayed  

E-Print Network (OSTI)

The introduction of a delay in the Friedmann equation of cosmological evolution is shown to result in the very early universe undergoing the necessary accelerated expansion in the usual radiation (or matter) dominated phase. Occurring even without a violation of the strong energy condition, this expansion slows down naturally to go over to the decelerated phase, namely the standard Hubble expansion. This may obviate the need for a scalar field driven inflationary epoch.

Debajyoti Choudhury; Debashis Ghoshal; Anjan Ananda Sen

2012-02-06T23:59:59.000Z

80

Standard Cosmology Delayed  

E-Print Network (OSTI)

The introduction of a delay in the Friedmann equation of cosmological evolution is shown to result in the very early universe undergoing the necessary accelerated expansion in the usual radiation (or matter) dominated phase. Occurring even without a violation of the strong energy condition, this expansion slows down naturally to go over to the decelerated phase, namely the standard Hubble expansion. This may obviate the need for a scalar field driven inflationary epoch.

Choudhury, Debajyoti; Sen, Anjan Ananda

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "air recirculation delay" 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

Design and implementation of a sector-based airspace model for the MIT Extensible Air Network Simulation  

E-Print Network (OSTI)

The MIT Extensible Air Network Simulation (MEANS) is a tool that has been designed to assist airline schedulers and air traffic managers in predicting flight delays for given air traffic scenarios. One aspect of the ...

Whittaker, Colin J

2006-01-01T23:59:59.000Z

82

Modeling delay in genetic networks: From delay birth-death processes to delay stochastic differential equations  

E-Print Network (OSTI)

genetic circuits17­26 ; the infusion of delay dramatically enhances the stability of such circuits27

Ott, William

83

Vehicle barrier with access delay  

DOE Patents (OSTI)

An access delay vehicle barrier for stopping unauthorized entry into secure areas by a vehicle ramming attack includes access delay features for preventing and/or delaying an adversary from defeating or compromising the barrier. A horizontally deployed barrier member can include an exterior steel casing, an interior steel reinforcing member and access delay members disposed within the casing and between the casing and the interior reinforcing member. Access delay members can include wooden structural lumber, concrete and/or polymeric members that in combination with the exterior casing and interior reinforcing member act cooperatively to impair an adversarial attach by thermal, mechanical and/or explosive tools.

Swahlan, David J; Wilke, Jason

2013-09-03T23:59:59.000Z

84

Ventilation System Effectiveness and Tested Indoor Air Quality Impacts  

SciTech Connect

Ventilation system effectiveness testing was conducted at two unoccupied, single-family, detached lab homes at the University of Texas - Tyler. Five ventilation system tests were conducted with various whole-building ventilation systems. Multizone fan pressurization testing characterized building and zone enclosure leakage. PFT testing showed multizone air change rates and interzonal airflow. Cumulative particle counts for six particle sizes, and formaldehyde and other Top 20 VOC concentrations were measured in multiple zones. The testing showed that single-point exhaust ventilation was inferior as a whole-house ventilation strategy. It was inferior because the source of outside air was not direct from outside, the ventilation air was not distributed, and no provision existed for air filtration. Indoor air recirculation by a central air distribution system can help improve the exhaust ventilation system by way of air mixing and filtration. In contrast, the supply and balanced ventilation systems showed that there is a significant benefit to drawing outside air from a known outside location, and filtering and distributing that air. Compared to the Exhaust systems, the CFIS and ERV systems showed better ventilation air distribution and lower concentrations of particulates, formaldehyde and other VOCs. System improvement percentages were estimated based on four System Factor Categories: Balance, Distribution, Outside Air Source, and Recirculation Filtration. Recommended System Factors could be applied to reduce ventilation fan airflow rates relative to ASHRAE Standard 62.2 to save energy and reduce moisture control risk in humid climates. HVAC energy savings were predicted to be 8-10%, or $50-$75/year.

Rudd, A.; Bergey, D.

2014-02-01T23:59:59.000Z

85

Compressed Air  

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

BPA Utility Reimbursement Programs for Compressed Air Projects Customer Proposal Template Measurement & Verification Plan for Compressed Air CA 2006-15 A template for utilities to...

86

Culture of selected organisms in recirculating and flow-through systems using thermal effluent  

E-Print Network (OSTI)

&M University; Chairman of Advisory Committee: Dr. Kirk Strawn Twenty species were cultured in tanks on flow-through and recirculating systems. Water source was the thermal effluent from the discharge can 1 of Houston Lighting a Power Company's Cedar Bayou..., pH and Turbidity Levels for Monitored Tanks Table Al Daily Temperature i Conductivity i Di s- solved Oxygen, pH and Turbidity Levels for Monitored Tanks Figures Al through A72 80 86 vu APPENDIX B ? Summary of Monthly Survival, L ngth...

Berry, Terri Layne

1978-01-01T23:59:59.000Z

87

Theory of delayed thermal fluorescence  

Science Journals Connector (OSTI)

A theory of nonradiative thermal activation involved in delayed thermal fluorescence has been developed from the viewpoint of the breakdown of the Born-Oppenheimer adiabatic approximation.

S. H. Lin

1971-01-01T23:59:59.000Z

88

Tritium Superpermeability: Experimental Investigation and Simulation of Tritium Recirculation in 'Prometheus' Setup  

SciTech Connect

The superpermeability phenomenon was suggested to use in fusion machines to separate the fuel mixture from helium ashes, to arrange in-vessel fuel recirculation contours and effective evacuation of fuel mixture out of machine exhaust. To develop this technology and to simulate tritium recirculation in RFNC-VNIIEF at the 'Prometheus' setup the experiments on superpermeation of hydrogen isotopes through metal membrane were realized.The results of experiments on superpermeation of hydrogen isotopes through cylindrical niobium membrane are presented. As the experiment has shown, membrane pumping rate is inversely proportional to square root of isotope mass and amount to 2.5 l/cm{sup 2}s for protium, 1.8 l/cm{sup 2}s for deuterium and 1.5 l/cm{sup 2}s for tritium. The possibility of effective pumping, separation of hydrogen isotopes from helium and residual gas, compression and recuperation of hydrogen isotopes by means of superpermeable membrane was demonstrated. It follows from results that the separation of D/T from He with employment of the techniques of superpermeable membranes might reduce the total amount of tritium in fuel cycle and substantially enhance the resource of cryogenic pumps evacuating helium.

Musyaev, R.K. [Russian Federal Nuclear Center-All-Russian Research Institute of Experimental Physics (Russian Federation); Lebedev, B.S. [Russian Federal Nuclear Center-All-Russian Research Institute of Experimental Physics (Russian Federation); Grishechkin, S.K. [Russian Federal Nuclear Center-All-Russian Research Institute of Experimental Physics (Russian Federation); Yukhimchuk, A.A. [Russian Federal Nuclear Center-All-Russian Research Institute of Experimental Physics (Russian Federation); Busnyuk, A.A [St.-Peterburg State University of Telecommunications (Russian Federation); Notkin, M.E. [St.-Peterburg State University of Telecommunications (Russian Federation); Samartsev, A.A. [St.-Peterburg State University of Telecommunications (Russian Federation); Livshits, A.I. [St.-Peterburg State University of Telecommunications (Russian Federation)

2005-07-15T23:59:59.000Z

89

Linear Fixed-Field Multi-Pass Arcs for Recirculating Linear Accelerators  

SciTech Connect

Recirculating Linear Accelerators (RLA's) provide a compact and efficient way of accelerating particle beams to medium and high energies by reusing the same linac for multiple passes. In the conventional scheme, after each pass, the different energy beams coming out of the linac are separated and directed into appropriate arcs for recirculation, with each pass requiring a separate fixed-energy arc. In this paper we present a concept of an RLA return arc based on linear combined-function magnets, in which two and potentially more consecutive passes with very different energies are transported through the same string of magnets. By adjusting the dipole and quadrupole components of the constituting linear combined-function magnets, the arc is designed to be achromatic and to have zero initial and final reference orbit offsets for all transported beam energies. We demonstrate the concept by developing a design for a droplet-shaped return arc for a dog-bone RLA capable of transporting two beam passes with momenta different by a factor of two. We present the results of tracking simulations of the two passes and lay out the path to end-to-end design and simulation of a complete dog-bone RLA.

V.S. Morozov, S.A. Bogacz, Y.R. Roblin, K.B. Beard

2012-06-01T23:59:59.000Z

90

Air Quality  

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

What We Monitor & Why » What We Monitor & Why » Air Quality Air Quality To preserve our existing wilderness-area air quality, LANL implements a conscientious program of air monitoring. April 12, 2012 Real-time data monitoring for particulate matter An air monitoring field team member tests one of LANL's tapered element oscillating microbalance samplers, which collects real-time particulate matter data. Contact Environmental Communication & Public Involvement P.O. Box 1663 MS M996 Los Alamos, NM 87545 (505) 667-0216 Email LANL monitors air quality 24 hours a day, 365 days a year. Why we monitor air LANL monitors many different pathways in order to assess their impact on workers, the public, animals, and plants. We monitor the air around the Laboratory to ensure our operations are not affecting the air of nearby

91

Numerical Modeling of Non-adiabatic Heat-Recirculating Combustors C. H. Kuo and P. D. Ronney  

E-Print Network (OSTI)

of temperature-dependent gas and solid properties, viscous flow, surface-to-surface radiative heat transfer, heat affect the performance of heat-recirculating combustors, but the relative importance of such effects, however, heat and friction losses become more significant, thus fuel-to-electricity conversion devices

92

Modeling of air brakes for onboard diagnostics of heavy trucks  

E-Print Network (OSTI)

declared out of service. Worn brake pads and tires, air leaks at hoses, connections, valves and brake chambers of the airbrake system along with the significant time delay in the actuation of tractor and trailer brakes degrade the vehicle braking...

Kankanala, Penchala N

2012-06-07T23:59:59.000Z

93

Impact of exhaust gas recirculation (EGR) on the oxidative reactivity of diesel engine soot  

SciTech Connect

This paper expands the consideration of the factors affecting the nanostructure and oxidative reactivity of diesel soot to include the impact of exhaust gas recirculation (EGR). Past work showed that soot derived from oxygenated fuels such as biodiesel carries some surface oxygen functionality and thereby possesses higher reactivity than soot from conventional diesel fuel. In this work, results show that EGR exerts a strong influence on the physical properties of the soot which leads to enhanced oxidation rate. HRTEM images showed a dramatic difference between the burning modes of the soot generated under 0 and 20% EGR. The soot produced under 0% EGR strictly followed an external burning mode with no evidence of internal burning. In contrast, soot generated under 20% EGR exhibited dual burning modes: slow external burning and rapid internal burning. The results demonstrate clearly that highly reactive soot can be achieved by manipulating the physical properties of the soot via EGR. (author)

Al-Qurashi, Khalid; Boehman, Andre L. [The EMS Energy Institute, The Pennsylvania State University, 405 Academic Activities Bldg., University Park, PA 16802 (United States)

2008-12-15T23:59:59.000Z

94

Economizer recirculation for low-load stability in heat recovery steam generator  

SciTech Connect

An economizer system is described for heating feedwater in a heat recovery steam generator which consists of: at least first and second economizer tube planes; each of the economizer tube planes including a plurality of generally parallel tubes; the tubes being generally vertically disposed; each of the economizer tube planes including a top header and a bottom header; all of the plurality of tubes in each economizer tube plane being connected in parallel to their top and bottom headers whereby parallel feedwater flow through the plurality of tubes between the top and bottom headers is enabled; one of the top and bottom headers being an inlet header; a second of the top and bottom headers being an outlet header; a boiler feed pump; the boiler feed pump being effective for applying a flow of feedwater to the inlet header; means for serially interconnecting the economizer tube planes; the means for serially interconnecting including means for flowing the feedwater upward and downward in tubes of alternating ones of the economizer tube planes between the inlet header and the outlet header; means for conveying heated feedwater from the outlet header to a using process; means for recirculating at least a portion of the heated feedwater from the outlet header to an inlet of the boiler feed pump; and the means for recirculating including means for relating the portion to a steam load in the using process whereby an increased flow is produced through all of the economizer tube planes at values of the steam load below a predetermined value and a condition permitting initiation of reverse flow in any of the tubes is substantially reduced.

Cuscino, R.T.; Shade, R.L. Jr.

1986-04-15T23:59:59.000Z

95

Air separation by the Moltox process. Interim final report  

SciTech Connect

Results are described of a development program on a new and energy-saving process for air separation. The Moltox process involves reversibly reacting oxygen in air with a recirculating salt solution, such that oxygen is extracted without depressurizing the remaining nitrogen. Energy savings of approximately 50% are indicated for this process compared to conventional cryogenic air separation. The development program consisted of design, construction, and operation of a 6 liter/minute pilot plant; optimization of the process flowsheet through computer modelling; investigation of engineering aspects of the process including corrosion, safety, and NO/sub x/ generation; and an economic comparison to conventional cryogenic practice. All objectives were satisfactorily achieved except for continuous operation of the pilot plant, and the modifications necessary to achieve that have been identified. Economically the Moltox process shows a substantial advantage over large scale cryogenic plants which are powered by fuel vice electricity.

Erickson, D.C.

1981-04-01T23:59:59.000Z

96

Research Statement of Hamsa Balakrishnan The air transportation system is a complex, global system that transports over 2.1 billion  

E-Print Network (OSTI)

is important because of the high costs of delays and pollution today, as well as the projected doubling in airResearch Statement of Hamsa Balakrishnan The air transportation system is a complex, global system that transports over 2.1 billion passengers each year. Air traffic delays have become a huge problem

Gummadi, Ramakrishna

97

Research Statement of Hamsa Balakrishnan The air transportation system is a large, complex, global system that transports over 2.1 billion  

E-Print Network (OSTI)

Research Statement of Hamsa Balakrishnan The air transportation system is a large, complex, global system that transports over 2.1 billion passengers each year. Air traffic delays have become a huge to the Joint Economic Committee of the US Senate, domestic air traffic delays in 2007 cost airlines over $19

98

Effect of exhaust gas recirculation on diesel knock intensity and its mechanism  

SciTech Connect

This paper presents an experimental study of the effect of exhaust gas recirculation (EGR) on diesel knock intensity, which is defined and discussed. In a previous paper, it was reported that particulate emission can be decreased by applying EGR under certain operating conditions; and the possible mechanism of the effect of EGR was presented. In the present study, the effect of EGR on diesel knock is examined under a variety of operating conditions. Diesel knock intensity is decreased considerably by EGR under the same operating conditions as when the particulate emission is decreased. A quantitative relationship between the diesel knock intensity and the maximum rate of cylinder pressure rise is obtained. The effect of EGR on diesel knock intensity is determined by both the chemical reaction rate of the initial premixed combustion (spontaneous ignition) and the fuel mass fraction prepared and burned in this stage. This is verified by measuring the ignition lag and classifying it into chemical and physical lags by a statistical technique.

Shiga, S.; Ehara, H.; Karasawa, T.; Kurabayashi, T.

1988-06-01T23:59:59.000Z

99

Use of Multipass Recirculation and Energy Recovery In CW SRF X-FEL Driver Accelerators  

SciTech Connect

We discuss the use of multipass recirculation and energy recovery in CW SRF drivers for short wavelength FELs. Benefits include cost management (through reduced system footprint, required RF and SRF hardware, and associated infrastructure - including high power beam dumps and cryogenic systems), ease in radiation control (low drive beam exhaust energy), ability to accelerate and deliver multiple beams of differing energy to multiple FELs, and opportunity for seamless integration of multistage bunch length compression into the longitudinal matching scenario. Issues include all those associated with ERLs compounded by the challenge of generating and preserving the CW electron drive beam brightness required by short wavelength FELs. We thus consider the impact of space charge, BBU and other environmental wakes and impedances, ISR and CSR, potential for microbunching, intra-beam and beam-residual gas scattering, ion effects, RF transients, and halo, as well as the effect of traditional design, fabrication, installation and operational errors (lattice aberrations, alignment, powering, field quality). Context for the discussion is provided by JLAMP, the proposed VUV/X-ray upgrade to the existing Jefferson Lab FEL.

Douglas, David; Akers, Walt; Benson, Stephen V.; Biallas, George; Blackburn, Keith; Boyce, James; Bullard, Donald; Coleman, James; Dickover, Cody; Ellingsworth, Forrest; Evtushenko, Pavel; Fisk, Sally; Gould, Christopher; Gubeli, Joseph; Hannon, Fay; Hardy, David; Hernandez-Garcia, Carlos; Jordan, Kevin; Klopf, John; Kortze, J.; Legg, Robert; Li, Rui; Marchlik, Matthew; Moore, Steven W.; Neil, George; Powers, Thomas; Sexton, Daniel; Shin, Ilkyoung; Shinn, Michelle D.; Tennant, Christopher; Terzic, Balsa; Walker, Richard; Williams, Gwyn P.; Wilson, G.; Zhang, Shukui

2010-08-01T23:59:59.000Z

100

Case study of landfill leachate recirculation using small-diameter vertical wells  

Science Journals Connector (OSTI)

Abstract A case study of landfill liquids addition using small diameter (5 cm) vertical wells is reported. More than 25,000 m3 of leachate was added via 134 vertical wells installed 3 m, 12 m, and 18 m deep over five years in a landfill in Florida, US. Liquids addition performance (flow rate per unit screen length per unit liquid head) ranged from 5.6 × 10?8 to 3.6 × 10?6 m3 s?1 per m screen length per m liquid head. The estimated radial hydraulic conductivity ranged from 3.5 × 10?6 to 4.2 × 10?4 m s?1. The extent of lateral moisture movement ranged from 8 to 10 m based on the responses of moisture sensors installed around vertical well clusters, and surface seeps were found to limit the achievable liquids addition rates, despite the use of concrete collars under a pressurized liquids addition scenario. The average moisture content before (51 samples) and after (272 samples) the recirculation experiments were 23% (wet weight basis) and 45% (wet weight basis), respectively, and biochemical methane potential measurements of excavated waste indicated significant (p < 0.025) decomposition.

Pradeep Jain; Jae Hac Ko; Dinesh Kumar; Jon Powell; Hwidong Kim; Lizmarie Maldonado; Timothy Townsend; Debra R. Reinhart

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "air recirculation delay" 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

Air Pollution  

Science Journals Connector (OSTI)

Both natural processes and human activities contribute to air pollution, with the combustion of fossil fuels being the largest anthropogenic source of air pollutants. Adverse health effects (above all respiratory and cardiovascular complications), damage to crops, natural vegetation and materials, reduced visibility and changed radiation balance of the atmosphere are the major consequences of high concentrations of air pollutants. Technical fixes can sharply reduce emissions from large stationary sources and lower the rates of automotive emissions, but the rising number of vehicles and longer time spent on the road will call for more radical solutions to traffic-generated photochemical smog now present in all major urban areas.

V. Smil

2001-01-01T23:59:59.000Z

102

Bos > AIR  

E-Print Network (OSTI)

The advent of air travel has produced a building typology completely new to the 20th century. The outdated planning of regions for airports render most existing airports as isolated, autonomous instances in the urban ...

Lee, Kevin Young

2014-01-01T23:59:59.000Z

103

Effect of air preheat temperature on the MILD combustion of syngas  

Science Journals Connector (OSTI)

Abstract The effect of air preheat temperature on MILD (Moderate or Intense Low-oxygen Dilution) combustion of coal-derived syngas was examined in parallel jet forward flow combustor. The results were presented on flow field using numerical simulations and on global flame signatures, OH? radicals distribution and exhaust emissions using experiments. The discrete and high speed air/fuel injections into the combustor is necessary for the establishment of MILD conditions, because they cause strong gas recirculation and form large mixing region between the air and fuel jets. The critical equivalence ratio above which MILD combustion occurred was identified. The MILD regime was established for syngas fuel under air preheating conditions with lean operational limit and suppressed \\{NOx\\} and CO emissions. In the MILD combustion regime, the air preheating resulted in higher \\{NOx\\} but lower CO emissions, while the increase of equivalence ratio led to the increase of \\{NOx\\} and the decrease of CO emissions.

Mingming Huang; Zhedian Zhang; Weiwei Shao; Yan Xiong; Yan Liu; Fulin Lei; Yunhan Xiao

2014-01-01T23:59:59.000Z

104

Feasibility study for a recirculating linac-based facility for femtosecond dynamics  

SciTech Connect

LBNL is pursuing design studies and the scientific program for a facility dedicated to the production of x-ray pulses with ultra-short time duration, for application in dynamical studies of processes in physics, biology, and chemistry. The proposed x-ray facility has the short x-ray pulse length ({approx}60 fs FWHM) necessary to study very fast dynamics, high flux (up to approximately 10E11 photons/sec/0.1 percentBW) to study weakly scattering systems, and tuneability over 1-12 keV photon energy. The hard x-ray photon production section of the machine accommodates seven 2-m long undulators. Design studies for longer wavelength sources, using high-gain harmonic generation, are in progress. The x-ray pulse repetition rate of 10 kHz is matched to studies of dynamical processes (initiated by ultra-short laser pulses) that typically have a long recovery time or are not generally cyclic or reversible and need time to allow relaxation, replacement, or flow of the sample. The technique for producing ultra-short x-ray pulses uses relatively long electron bunches to minimize high-peak-current collective effects, and the ultimate x-ray duration is achieved by a combination of bunch manipulation and optical compression. Synchronization of x-ray pulses to sample excitation signals is expected to be of order 50 - 100 fs. Techniques for making use of the recirculating geometry to provide beam-based signals from early passes through the machine are being studied.

Corlett, J.N.; Barry, W.; Barletta, W.A.; Byrd, J.M.; DeSantis, S.; Doolittle, L.; Fawley, W.; Green, M.A.; Hartman, N.; Heimann, P.; Kairan, D.; Kujawski, E.; Li, D.; Lidia, S.; Luft, P.; McClure, R.; Parmigiani, F.; Petroff, Y.; Pirkl, W.; Placidi, M.; Reavill, D.; Reichel, I.; Rimmer, R.A.; Ratti, A.; Robinson, K.E.; Sannibale, F.; Schoenlein, R.; Staples, J.; Tanabe, J.; Truchlikova, D.; Wan, W.; Wang, S.; Wells, R.; Wolski, A.; Zholents, A.

2002-12-21T23:59:59.000Z

105

Exhaust gas recirculation trials with high-speed marine and rail diesel engines  

Science Journals Connector (OSTI)

On diesel engines in particular, series production in both passenger and commercial vehicle sectors has long incorporated systems which introduce cooled exhaust gas into the charge air in order to lower peak c...

Dirk Bergmann; Christian Philipp; Helmut Rall; Rolf Traub

2006-01-01T23:59:59.000Z

106

Delayed Neutron and Delayed Photon Characteristics from Photofission of Actinides  

SciTech Connect

Delayed neutron (DN) and delayed photon (DP) emissions from photofission reactions play an important role for applications involving nuclear material detection and characterization. To provide new, accurate, basic nuclear data for evaluations and data libraries, an experimental programme of DN and DP measurements has been undertaken for actinides with bremsstrahlung endpoint energy in the giant resonance region ({approx}15 MeV). In this paper, the experimental setup and the data analysis method will be described. Experimental results for DN and DP characteristics will be presented for {sup 232}Th, {sup 235,238}U, {sup 237}Np, and {sup 239}Pu. Finally, an example of an application to study the contents of nuclear waste packages will be briefly discussed.

Dore, D.; Berthoumieux, E.; Leprince, A.; Ridikas, D. [DSM/IRFUS/PhN, CEA/Saclay, Gif-sur-Yvette, F-91191 (France); Ledoux, X. [CEA/DAM/DIF, Arpajon, F-91297 (France); Agelou, M.; Carrel, F.; Gmar, M. [CEA, LIST, Gif-sur-Yvette, F-91191 (France)

2011-12-13T23:59:59.000Z

107

IMPROVED SEMI-PARAMETRIC TIME SERIES MODELS OF AIR POLLUTION AND MORTALITY  

E-Print Network (OSTI)

series analyses of air pollution and health attracted the attention of the scientific community, policy uncertainty in time series studies of air pollution and health. This discovery delayed the completion) for six "criteria" air pollutants at a level that protects the public's health (Environmental Protection

Hastie, Trevor

108

Air Resources: Prevention and Control of Air Contamination and Air  

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

Air Resources: Prevention and Control of Air Contamination and Air Air Resources: Prevention and Control of Air Contamination and Air Pollution, Air Quality Classifications and Standards, and Air Quality Area Classifications (New York) Air Resources: Prevention and Control of Air Contamination and Air Pollution, Air Quality Classifications and Standards, and Air Quality Area Classifications (New York) < Back Eligibility Agricultural Fuel Distributor Industrial Institutional Investor-Owned Utility Local Government Multi-Family Residential Municipal/Public Utility Nonprofit Rural Electric Cooperative Schools State/Provincial Govt Transportation Tribal Government Utility Program Info State New York Program Type Environmental Regulations Provider NY Department of Environmental Conservation These regulations establish emissions limits and permitting and operational

109

On the Cost/Delay Tradeoff of Wireless Delay Tolerant Geographic Routing Argyrios G. Tasiopoulos  

E-Print Network (OSTI)

On the Cost/Delay Tradeoff of Wireless Delay Tolerant Geographic Routing Argyrios G. Tasiopoulos transport cost of a packet and the delay in its delivery. We study this tradeoff in the context of geographical routing in wireless DTNs. We first specify the optimal cost/delay tradeoff, i.e., the tradeoff

Glinz, Martin

110

Stability criteria for BAM neural networks with leakage delays and probabilistic time-varying delays  

Science Journals Connector (OSTI)

This paper is concerned with the stability criteria for bidirectional associative memory (BAM) neural networks with leakage time delay and probabilistic time-varying delays. By establishing a stochastic variable with Bernoulli distribution, the information ... Keywords: BAM neural networks, Leakage delay, Probabilistic time-varying delays

S. Lakshmanan, Ju H. Park, Tae H. Lee, H. Y. Jung, R. Rakkiyappan

2013-05-01T23:59:59.000Z

111

Distributed Delays Stabilize Ecological Feedback Systems  

Science Journals Connector (OSTI)

We consider the effect of distributed delays in predator-prey models and ecological food webs. Whereas the occurrence of delays in population dynamics is usually regarded a destabilizing factor leading to the extinction of species, we here demonstrate complementarily that delay distributions yield larger stability regimes than single delays. Food webs with distributed delays closely resemble nondelayed systems in terms of ecological stability measures. Thus, we state that dependence of dynamics on multiple instances in the past is an important, but so far underestimated, factor for stability in dynamical systems.

Christian W. Eurich; Andreas Thiel; Lorenz Fahse

2005-04-22T23:59:59.000Z

112

EPA TO OVERHAUL AIR POLLUTION LAW  

Science Journals Connector (OSTI)

Administration's new source review plan aids industry, angers environmentalists, states ... Representatives of chemical companies, utilities, and other industry sectors loudly applauded a long-delayed Environmental Protection Agency announcement that it will rewrite new source review (NSR), a 25-year-old provision of the Clean Air Act. ... A part of that plan called for EPA and the Department of Justice to review the energy implications and legality of NSR enforcement. ...

JEFF JOHNSON

2002-07-01T23:59:59.000Z

113

Delays, Unstable Particles, and Transport Theory  

E-Print Network (OSTI)

Delays associated with elementary interaction processes are investigated. The case of broad resonances is discussed in the context of reaction simulations.

P. Danielewicz; S. Pratt

1997-02-18T23:59:59.000Z

114

Air Corrosivity in U.S. Outdoor-Air-Cooled Data Centers is Similar to That in Conventional Data Centers  

SciTech Connect

There is a concern that environmental-contamination caused corrosion may negatively affect Information Technology (IT) equipment reliability. Nineteen data centers in the United States and two in India were evaluated using Corrosion Classification Coupons (CCC) to assess environmental air quality as it may relate IT equipment reliability. The data centers were of two basic types: closed and outside-air cooled. A closed data center provides cool air to the IT equipment using air conditioning in which only a small percent age of the recirculation air is make-up air continuously supplied from outside to meet human health requirements. An outside-air cooled data center uses outside air directly as the primary source for IT equipment cooling. Corrosion measuring coupons containing copper and silver metal strips were placed in both closed and outside-air cooled data centers. The coupons were placed at each data center (closed and outside-air cooled types) with the location categorized into three groups: (1) Outside - coupons sheltered, located near or at the supply air inlet, but located before any filtering, (2) Supply - starting just after initial air filtering continuing inside the plenums and ducts feeding the data center rooms, and (3) Inside located inside the data center rooms near the IT equipment. Each coupon was exposed for thirty days and then sent to a laboratory for a corrosion rate measurement analysis. The goal of this research was to investigate whether gaseous contamination is a concern for U.S. data center operators as it relates to the reliability of IT equipment. More specifically, should there be an increased concern if outside air for IT equipment cooling is used To begin to answer this question limited exploratory measurements of corrosion rates in operating data centers in various locations were undertaken. This study sought to answer the following questions: (1) What is the precision of the measurements (2) What are the approximate statistical distributions of copper and silver corrosion rates in the sampled data centers(3) To what extent are copper and silver corrosion measurements related (4) What is the relationship of corrosion rate measurements between outside-air cooled data centers compared to closed data centers (5) How do corrosivity measurements relate to IT equipment failure rates The data from our limited sample size suggests that most United States data center operators should not be concerned with environmental gaseous contamination causing high IT equipment failure rates even when using outside-air cooling. The research team recommends additional basic research on how environmental conditions, specifically gaseous contamination, affect electronic equipment reliability.

Coles, Henry C.; Han, Taewon; Price, Phillip N.; Gadgil, Ashok J.; Tschudi, William F.

2011-07-17T23:59:59.000Z

115

Gas-phase and catalytic combustion in heat-recirculating burners Jeongmin Ahn, Craig Eastwood, Lars Sitzki* and Paul D. Ronney  

E-Print Network (OSTI)

title: Extinction limits in excess enthalpy burners To be published in Proceedings of the Combustion that hydrocarbon fuels contain 100 times more energy per unit mass than lithium-ion batteries, thus devices engines may be impractical. Consequently, many groups have considered heat-recirculating, or "excess

116

Isochronal synchronization of delay-coupled systems  

E-Print Network (OSTI)

We consider small network models for mutually delay-coupled systems which typically do not exhibit stable isochronally synchronized solutions. We show that for certain coupling architectures which involve delayed self feedback to the nodes, the oscillators become isochronally synchronized. Applications are shown for both incoherent pump coupled lasers and spatio-temporal coupled fiber ring lasers.

Ira B. Schwartz; Leah B. Shaw

2006-09-09T23:59:59.000Z

117

FPGA Interconnect Delay Fault Testing Erik Chmelar  

E-Print Network (OSTI)

A satisfactory FPGA testing method meets several crite- ria. First, the routing resources must be explicitlyFPGA Interconnect Delay Fault Testing Erik Chmelar Center for Reliable Computing Stanford is a scalable manufactur- ing test method for all SRAM-based FPGAs, able to detect multiple interconnect delay

Stanford University

118

Air Leakage of Furnaces and Air Handlers  

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

Air Leakage of Furnaces and Air Handlers Air Leakage of Furnaces and Air Handlers Title Air Leakage of Furnaces and Air Handlers Publication Type Journal Article LBNL Report Number LBNL-5553E Year of Publication 2010 Authors Walker, Iain S., Mile Lubliner, Darryl J. Dickerhoff, and William W. Delp Journal 2010 ACEEE Summer Study on Energy Efficiency in Buildings The Climate for efficiency is now Date Published 08/2010 Abstract In recent years, great strides have been made in reducing air leakage in residential and to a lesser extent small commercial forced air duct systems. Several authorities have introduced low leakage limits for thermal distribution systems; for example, the State of California Energy Code for Buildings gives credit for systems that leak less than 6% of the total air flow at 25 Pa.

119

Metal-Air Batteries  

SciTech Connect

Metal-air batteries have much higher specific energies than most currently available primary and rechargeable batteries. Recent advances in electrode materials and electrolytes, as well as new designs on metal-air batteries, have attracted intensive effort in recent years, especially in the development of lithium-air batteries. The general principle in metal-air batteries will be reviewed in this chapter. The materials, preparation methods, and performances of metal-air batteries will be discussed. Two main metal-air batteries, Zn-air and Li-air batteries will be discussed in detail. Other type of metal-air batteries will also be described.

Zhang, Jiguang; Bruce, Peter G.; Zhang, Gregory

2011-08-01T23:59:59.000Z

120

Use of Produced Water in Recirculated Cooling Systems at Power Generating Facilities  

SciTech Connect

Tree ring studies indicate that, for the greater part of the last three decades, New Mexico has been relatively 'wet' compared to the long-term historical norm. However, during the last several years, New Mexico has experienced a severe drought. Some researchers are predicting a return of very dry weather over the next 30 to 40 years. Concern over the drought has spurred interest in evaluating the use of otherwise unusable saline waters to supplement current fresh water supplies for power plant operation and cooling and other uses. The U.S. Department of Energy's National Energy Technology Laboratory sponsored three related assessments of water supplies in the San Juan Basin area of the four-corner intersection of Utah, Colorado, Arizona, and New Mexico. These were (1) an assessment of using water produced with oil and gas as a supplemental supply for the San Juan Generating Station (SJGS); (2) a field evaluation of the wet-surface air cooling (WSAC) system at SJGS; and (3) the development of a ZeroNet systems analysis module and an application of the Watershed Risk Management Framework (WARMF) to evaluate a range of water shortage management plans. The study of the possible use of produced water at SJGS showed that produce water must be treated to justify its use in any reasonable quantity at SJGS. The study identified produced water volume and quality, the infrastructure needed to deliver it to SJGS, treatment requirements, and delivery and treatment economics. A number of produced water treatment alternatives that use off-the-shelf technology were evaluated along with the equipment needed for water treatment at SJGS. Wet surface air-cooling (WSAC) technology was tested at the San Juan Generating Station (SJGS) to determine its capacity to cool power plant circulating water using degraded water. WSAC is a commercial cooling technology and has been used for many years to cool and/or condense process fluids. The purpose of the pilot test was to determine if WSAC technology could cool process water at cycles of concentration considered highly scale forming for mechanical draft cooling towers. At the completion of testing, there was no visible scale on the heat transfer surfaces and cooling was sustained throughout the test period. The application of the WARMF decision framework to the San Juan Basis showed that drought and increased temperature impact water availability for all sectors (agriculture, energy, municipal, industry) and lead to critical shortages. WARMF-ZeroNet, as part of the integrated ZeroNet decision support system, offers stakeholders an integrated approach to long-term water management that balances competing needs of existing water users and economic growth under the constraints of limited supply and potential climate change.

C. McGowin; M. DiFilippo; L. Weintraub

2006-06-30T23:59:59.000Z

Note: This page contains sample records for the topic "air recirculation delay" 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

Air Pollution Control  

Science Journals Connector (OSTI)

Petroleum and chemical processes are responsible for many emissions both into the air. Most relevant emissions into the air are nitrous oxides (NOx), sulfur oxides ... compounds (VOC).The major cause of all air pollution

Alireza Bahadori

2014-01-01T23:59:59.000Z

122

Hickam Air Force Base  

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

Hickam Air Force Base spans 2,850 acres in Honolulu, Hawaii. The military base is home to the 15th Airlift Wing, the Hawaii Air National Guard, and the Pacific Air Forces headquarters.

123

OLYMPIC AIR QUALITY QUESTIONABLE  

Science Journals Connector (OSTI)

OLYMPIC AIR QUALITY QUESTIONABLE ... Athletes GOING FOR GOLD worry about Beijing’s air ... Atmospheric chemists say the air quality during the Beijing Games literally rests on which direction the winds blow. ...

RACHEL PETKEWICH

2008-07-28T23:59:59.000Z

124

Air Quality and Pollution  

Science Journals Connector (OSTI)

Air quality refers to the physical, chemical, and biological characteristics of air, both in outside space and in enclosed ... other non?industrial working places, and residencies. Air pollution is the abnormal ...

Zoran Marmut

2008-01-01T23:59:59.000Z

125

Primary zone air proportioner  

DOE Patents (OSTI)

An air proportioner is provided for a liquid hydrocarbon fueled gas turbine of the type which is convertible to oil gas fuel and to coal gas fuel. The turbine includes a shell for enclosing the turbine, an air duct for venting air in said shell to a gasifier, and a fuel injector for injecting gasified fuel into the turbine. The air proportioner comprises a second air duct for venting air from the air duct for mixing with fuel from the gasifier. The air can be directly injected into the gas combustion basket along with the fuel from the injector or premixed with fuel from the gasifier prior to injection by the fuel injector.

Cleary, Edward N. G. (San Diego, CA)

1982-10-12T23:59:59.000Z

126

Effect of Thymectomy on ‘Delayed' Hypersensitive Reactions  

Science Journals Connector (OSTI)

... appeared to delay the onset and slow the tempo of rejection of skin homografts from Sherman strain rats. Grafts were inspected at 10 days and acceptance or rejection assessed by ...

BARRY G. ARNASON; BRANISLAV D. JANKOVI?; BYRON H. WAKSMAN

1962-04-07T23:59:59.000Z

127

Uncertainty evaluation of delayed neutron decay parameters  

E-Print Network (OSTI)

parameters fit their individual measurement data well in spite of these differences. This dissertation focuses on evaluation of the errors and methods of delayed neutron relative yields and decay constants for thermal fission of U-235. Various numerical...

Wang, Jinkai

2009-05-15T23:59:59.000Z

128

Delayed neutron activation analysis for safeguards  

Science Journals Connector (OSTI)

Delayed neutron activation analysis (DNAA) presents a fast, accurate, and reliable method for quantification of fissile material. The method has relatively few sources of error and may be accomplished nondestruct...

D. C. Glasgow

2008-04-01T23:59:59.000Z

129

Hybrid delayed/undelayed LQG compensation  

E-Print Network (OSTI)

Loss Functions 1. Formulation of Sampled-data Equivalent Plant 2. Discretizing the Loss Function HYBRID DELAYED/UNDELAYED FEEDBACK . A. Hybrid (Delayed + Undelayed) Controller Structures B. Continuous-Undelayed Fccdback Structure 1. Defining... the SDE 2. Discretizing the LQG Objective . C. Sampled-Undelsyed Feedback Structure . 1. Defining the SDE 2. Discretization of Loss Function D. Remarks 9 11 17 20 20 23 23 26 29 30 32 35 IV LQG TRADE-OFFS FOR A DOUBLE-IVTEGRATOR PLANT A...

Wattal, Ankush

2012-06-07T23:59:59.000Z

130

Use of Produced Water in Recirculating Cooling Systems at Power Generating Facilities  

SciTech Connect

The purpose of this study is to evaluate produced water as a supplemental source of water for the San Juan Generating Station (SJGS). This study incorporates elements that identify produced water volume and quality, infrastructure to deliver it to SJGS, treatment requirements to use it at the plant, delivery and treatment economics, etc. SJGS, which is operated by Public Service of New Mexico (PNM) is located about 15 miles northwest of Farmington, New Mexico. It has four units with a total generating capacity of about 1,800 MW. The plant uses 22,400 acre-feet of water per year from the San Juan River with most of its demand resulting from cooling tower make-up. The plant is a zero liquid discharge facility and, as such, is well practiced in efficient water use and reuse. For the past few years, New Mexico has been suffering from a severe drought. Climate researchers are predicting the return of very dry weather over the next 30 to 40 years. Concern over the drought has spurred interest in evaluating the use of otherwise unusable saline waters. This deliverable describes possible test configurations for produced water demonstration projects at SJGS. The ability to host demonstration projects would enable the testing and advancement of promising produced water treatment technologies. Testing is described for two scenarios: Scenario 1--PNM builds a produced water treatment system at SJGS and incorporates planned and future demonstration projects into the design of the system. Scenario 2--PNM forestalls or decides not to install a produced water treatment system and would either conduct limited testing at SJGS (produced water would have to be delivered by tanker trucked) or at a salt water disposal facility (SWD). Each scenario would accommodate demonstration projects differently and these differences are discussed in this deliverable. PNM will host a demonstration test of water-conserving cooling technology--Wet Surface Air Cooling (WSAC) using cooling tower blowdown from the existing SJGS Unit 3 tower--during the summer months of 2005. If successful, there may be follow-on testing using produced water. WSAC is discussed in this deliverable. Recall that Deliverable 4, Emerging Technology Testing, describes the pilot testing conducted at a salt water disposal facility (SWD) by the CeraMem Corporation. This filtration technology could be a candidate for future demonstration testing and is also discussed in this deliverable.

Kent Zammit; Michael N. DiFilippo

2005-07-01T23:59:59.000Z

131

Performance and emission evaluation of biodiesel fueled diesel engine abetted with exhaust gas recirculation and Ni coated catalytic converter  

Science Journals Connector (OSTI)

This article summarizes the results of a laboratory exertion to evaluate the performance and emission parameters of a single cylinder water cooled direct injection diesel engine with and without the aid of exhaust gas recirculation (EGR) as well as with and without the assistance of nickel coated catalytic converter. Neat diesel ethyl esters of waste frying oil (B100) and its diesel blends (B20 and B40) were used as test fuels to assess the various engine operating parameters. Conjointly in this work the effects of emission characteristics by incorporating nickel coated catalytic converter along with 0% 15% and 20% of HOT EGR technique are elaborately discussed. Experimental results proved that the diesel engine operated up to B40 blends assisted by catalytic converter and 15% EGR level showed an adequate reduction in oxides of nitrogen in the exhaust pipe. Also EGR level up to 15% proved reasonable brake thermal efficiency and specific fuel consumption when the test engine operated up to B40 biodiesel-diesel blends.

D. Subramaniam; A. Murugesan; A. Avinash

2013-01-01T23:59:59.000Z

132

System analysis of membrane facilitated water generation from air humidity  

Science Journals Connector (OSTI)

Abstract The use of water vapor selective membranes can reduce the energy requirement for extracting water out of humid air by more than 50%. We performed a system analysis of a proposed unit, that uses membranes to separate water vapor from other atmospheric gases. This concentrated vapor can then be condensed specifically, rather than cooling the whole body of air. The driving force for the membrane permeation is maintained with a condenser and a vacuum pump. The pump regulates the total permeate side pressure by removing non-condensable gases that leak into the system. We show that by introducing a low-pressure, recirculated, sweep stream, the total permeate side pressure can be increased without impairing the water vapor permeation. This measure allows energy efficiency even in the presence of leakages, as it significantly lowers the power requirements of the vacuum pump. Such a constructed atmospheric water generator with a power of 62 kW could produce 9.19 m3/day of water (583 MJ/m3) as compared to 4.45 m3/day (1202 MJ/m3) that can be condensed without membranes. Due to the physical barrier the membrane imposes, fresh water generated in this manner is also cleaner and of higher quality than water condensed directly out of the air.

D. Bergmair; S.J. Metz; H.C. de Lange; A.A. van Steenhoven

2014-01-01T23:59:59.000Z

133

Air Pollution Spring 2010  

E-Print Network (OSTI)

and control. 6. Examine regional and global air pollution issues. Prerequisite: CHEM 113 and (MATH 261 or MATHATS 555 Air Pollution Spring 2010 T Th 11:00 ­ 12:15, NESB 101 Instructor: Prof. Sonia Kreidenweis an understanding of types and sources of air pollution. 2. Examine concentrations of air pollutants

134

A framework for delay emulation of large-scale internetworks  

E-Print Network (OSTI)

, and Delay Injector. The Virtual Host Configuration Module enables a machine to act as a set of virtual hosts with arbitrary IP addresses. The Delay Estimator can compute delay values for any two arbitrary IP addresses. The Delay Injector captures packets...

Venkata, Shravan Rangaraju

2012-06-07T23:59:59.000Z

135

The Use of Exhaust Gas Recirculation to Optimize Fuel Economy and Minimize Emission in Engines Operating on E85 Fuel  

SciTech Connect

This report summarizes activities conducted for the project “The Use of Exhaust Gas Recirculation to Optimized Fuel Economy and Minimize Emissions in Engines Operating on E85 Fuel” under COOPERATIVE AGREEMENT NUMBER DE-FC26-07NT43271, which are as outlined in the STATEMENT OF PROJECT OBJECTIVES (SOPO) dated March 2007 and in the supplemental SOPO dated October 2010. The project objective was to develop and demonstrate an internal combustion engine that is optimized for E85 (85% ethanol and 15% gasoline) fuel operation to achieve substantially improved fuel economy while operating with E85 fuel and that is also production viable in the near- to medium-term. The key engine technology selected for research and development was turbocharging, which is known to improve fuel economy thru downsizing and is in particular capable of exploiting ethanol fuel’s characteristics of high octane number and high latent heat of vaporization. The engine further integrated synergistic efficiency improving technologies of cooled exhaust gas recirculation (EGR), direct fuel injection and dual continuously variable intake and exhaust cam phasers. On the vehicle level, fuel economy was furthered thru powertrain system optimization by mating a state-of-the-art six-speed automatic transmission to the engine. In order to achieve the project’s objective of near- to medium-term production viability, it was essential to develop the engine to be flex-fuel capable of operating with fuels ranging from E0 (0% ethanol and 100% gasoline) to E85 and to use three-way type of catalyst technology for exhaust aftertreatment. Within these scopes, various technologies were developed through systems approach to focus on ways to help accelerate catalyst light-off. Significant amount of development took place during the course of the project within General Motors, LLC. Many prototype flex-fuel engines were designed, built and developed with various hardware configurations selected to achieve the project goals. Several flex-fuel demonstration vehicles were designed and built for carrying out calibration development and final testing to quantify the technology merits. Based on the extensive test results collected from dynamometer and vehicle testing, the fuel economy benefits of cooled EGR from the intended level of turbocharger technology were quantified. When combined with turbo downsizing, the FE benefits are considered large enough for E0 fuel as well as for E85 fuel to warrant further development of the technology beyond the current proof-of-concept level to a level that can meet production driveability quality and durability requirements in order to meet customers’ expectations. Cold-start cart test results from the emissions segment of the project were positive, confirming the assumption of faster thermal response of turbo exhaust system for emissions reductions for both E0 and E85 fuels. Vehicle emissions test results directionally correlated to the cold-start cart findings. The limited number of test runs did demonstrate the potentials of meeting stringent emission standards, however, they did not comprehend the factors such as hardware variability and long-term durability, 3 which are essential for mass production to satisfy customers’ expectations. It is therefore recommended, moving forward, durability concerns over turbocharger, EGR system and aftertreatment system, which would likely impact production viability, should be addressed. The data moreover suggested that further FE increase is likely with turbocharger technology advancement.

Wu, Ko-Jen

2011-12-31T23:59:59.000Z

136

Energy-efficient heat recovery systems for air conditioning of indoor swimming pools  

SciTech Connect

Analysis of a conventional air-conditioning system for indoor swimming pools during the summer season is presented. The analysis showed that the cooling load is characterized by a large latent heat fraction. As a result, a reheating process must be used downstream of the cooling coil to achieve the proper design comfort condition in the pool area. This, in turn, increases the energy requirement per unit cooling load of the pool. Two heat recovery systems are proposed to reduce this energy. In the first system, ambient air is used for the reheating process in an air-to-air heat exchanger. In the second system, mixed air--recirculated and ambient air--is used for the reheating process. Heat recovery efficiency is defined as an index of the energy savings resulting from the use of the heat recovery system compared to that of a conventional air-conditioning system. At a wide range of ambient conditions it is found that the energy savings could be up to 70% of the energy required to operate a conventional air-conditioning system. A parametric study was carried out to size the air-to-air heat exchanger associated with these heat recovery systems, and the results showed that a heat exchanger having an effectiveness of 0.5 would give satisfactory results. The proposed heat recovery systems are also compared to the case of reheating using the heat rejection from the condenser of the refrigeration machine. The comparison showed that the proposed systems save more energy than reheating using the condenser heat. A typical case study is given to demonstrate the savings in energy consumption when these systems are used.

Elsayed, M.M.; El-Refaee, M.M. [Kuwait Univ., Safat (Kuwait). Mechanical Engineering Dept.; Borhan, Y.A. [Gulf Engineering Co., Safat (Kuwait)

1997-12-31T23:59:59.000Z

137

Healthy Air Act (Maryland)  

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

The Maryland Healthy Air Act was developed with the purpose of bringing Maryland into attainment with the National Ambient Air Quality Standards (NAAQS) for ozone and fine particulate matter by the...

138

Air and Water Pollution  

Science Journals Connector (OSTI)

Air Pollution.... Many pollutants enter our bodies through the air we breathe at 13,000 l/day ... to quantitatively understand the basic environmental physics of pollution. This chapter covers the foll...

David Hafemeister

2014-01-01T23:59:59.000Z

139

Aesculap, Inc. Air Products  

E-Print Network (OSTI)

Aesculap, Inc. Air Products Air Products Foundation Alaric Compliance Services, LLC Alvin H. Butz & Herger, Inc. Sodexo Campus Services Sodexo Inc. and Affiliates Stupp Bros., Inc. Sugarbush Products, Inc

Napier, Terrence

140

Delay tails in MapReduce scheduling  

Science Journals Connector (OSTI)

MapReduce/Hadoop production clusters exhibit heavy-tailed characteristics for job processing times. These phenomena are resultant of the workload features and the adopted scheduling algorithms. Analytically understanding the delays under different schedulers ... Keywords: MapReduce, coupling scheduler, fair scheduler, first in first out, hadoop, heavy-tails, processor sharing

Jian Tan; Xiaoqiao Meng; Li Zhang

2012-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "air recirculation delay" 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

CAUSALITY, MEMORY ERASING AND DELAYED CHOICE EXPERIMENTS  

E-Print Network (OSTI)

Comment on [R.L. Ingraham, Phys. Rev. A 50, 4502 (1994)]. Ingraham suggested ``a delayed-choice experiment with partial, controllable memory erasing''. It is shown that he cannot be right since his predictions contradict relativistic causality. A subtle quantum effect which was overlooked by Ingraham is explained.

Y. Aharonov; S. Popsecu; L. Vaidman

1995-01-08T23:59:59.000Z

142

Modeling Delivery Delay for Flooding in Mobile  

E-Print Network (OSTI)

Modeling Delivery Delay for Flooding in Mobile Ad Hoc Networks TR-UTEDGE-2009-004 Taesoo Jun for Flooding in Mobile Ad Hoc Networks Taesoo Jun, Nirmalya Roy, and Christine Julien The Center for Excellence. In mobile networks, a major component of many of these routing protocols is some form of flooding, which

Julien, Christine

143

Minimize Compressed Air Leaks  

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

This tip sheet outlines a strategy for compressed air leak detection and provides a formula for cost savings calculations.

144

Air Products effective way  

E-Print Network (OSTI)

PE O A e s a b O T A O ENNST Overview Air Products effective way standard me Departm Shipping has recently y of shipping eans. Air Pro ontainer that es of this pro onduct mark eep accelera eep the cost tilize widely a earch and m m visited Air er needs wer model was cr m approache ms

Demirel, Melik C.

145

Determining the Right Air Quality for Your Compressed Air System  

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

This tip sheet outlines the main factors for determining the right air quality for compressed air systems.

146

Recirculating cryogenic hydrogen maser  

Science Journals Connector (OSTI)

We report on the design and initial testing of a new type of hydrogen maser, operated at dilution refrigerator temperatures, in which H atoms circulate back and forth between a microwave-pumped state selector and the maser cavity. Other novel design features include liquid-4He-coated walls, He-cooled electronics, and the use of microscopic magnetic particles to relax the two lowest hyperfine levels in the state selector. Stabilities at least as good as that of a Rb clock and a high-stability quartz oscillator are observed for measuring times between 1 and 300 s.

M. D. Hürlimann; W. N. Hardy; A. J. Berlinsky; R. W. Cline

1986-08-01T23:59:59.000Z

147

Thin Air Breathing  

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

Thin Air Breathing Thin Air Breathing Name: Amy Location: N/A Country: N/A Date: N/A Question: Why is it hard to breathe in thin air? What health dangers do mountain climbers face at high altitudes? Replies: Among the obvious dangers of losing ones footing, the oxygen available in the air is considerable less at higher altitudes. If I recall correctly, 21% of the atmosphere at standard temperature and pressure at sea level is composed of oxygen. This is less at higher altitudes. One can lose consciousness and even die in an oxygen deficient environment with changes from oxygen content to lower than 19.5%. This can unfortunate effect can occur within minutes. Dr. Myron The air is not really thin at high altitudes. The problem is that air pressure is lower. As altitude increases, air pressure decreases. In order for your lungs to fill with air, the air pressure in your lungs has to be less than the pressure of the air outside your lungs. Air moves from areas of higher pressure to lower pressure. As your diaphragm (the muscle that separates your chest cavity from your abdominal cavity) moves downward, the size of your chest cavity increases. This decreases the pressure in your chest and air flows in. When the diaphragm is up, it puts pressure on the chest cavity and the pressure in the lungs is greater than outside the lungs. Air flows out. This is an example of Boyle's Law. The movement of the diaphragm is controlled by the brainstem. Anyway-the reason that it is harder for some people to breathe at higher altitudes is that the air pressure differences aren't as great between the inside of the lungs and outside.

148

Built-In Self Test (BIST) for Realistic Delay Defects  

E-Print Network (OSTI)

Testing of delay defects is necessary in deep submicron (DSM) technologies. High coverage delay tests produced by automatic test pattern generation (ATPG) can be applied during wafer and package tests, but are difficult to apply during the board...

Tamilarasan, Karthik Prabhu

2012-02-14T23:59:59.000Z

149

Fundamentals of Delayed Coking Joint Industry Project  

SciTech Connect

Delayed coking evolved steadily over the early to mid 1900s to enable refiners to convert high boiling, residual petroleum fractions to light products such as gasoline. Pound for pound, coking is the most energy intensive of any operation in a modern refinery. Large amounts of energy are required to heat the thick, poor-quality petroleum residuum to the 900 to 950 degrees F required to crack the heavy hydrocarbon molecules into lighter, more valuable products. One common misconception of delayed coking is that the product coke is a disadvantage. Although coke is a low valued (near zero economic value) byproduct, compared to transportation fuels, there is a significant worldwide trade and demand for coke as it is an economical fuel. Coke production has increased steadily over the last ten years, with further increases forecast for the foreseeable future. Current domestic production is near 111,000 tons per day. A major driving force behind this increase is the steady decline in crude quality available to refiners. Crude slates are expected to grow heavier with higher sulfur contents while environmental restrictions are expected to significantly reduce the demand for high-sulfur residual fuel oil. Light sweet crudes will continue to be available and in even greater demand than they are today. Refiners will be faced with the choice of purchasing light sweet crudes at a premium price, or adding bottom of the barrel upgrading capability, through additional new investments, to reduce the production of high-sulfur residual fuel oil and increase the production of low-sulfur distillate fuels. A second disadvantage is that liquid products from cokers frequently are unstable, i.e., they rapidly form gum and sediments. Because of intermediate investment and operating costs, delayed coking has increased in popularity among refiners worldwide. Based on the 2000 Worldwide Refining Survey published in the Oil and Gas, the delayed coking capacity for 101 refineries around the world is 2,937,439 barrels/calendar day. These cokers produce 154,607 tons of coke per day and delayed coking accounts for 88% of the world capacity. The delayed coking charge capacity in the United States is 1,787,860 b/cd. Despite its wide commercial use, only relatively few contractors and refiners are truly knowledgeable in delayed-coking design, so that this process carries with it a ''black art'' connotation. Until recently, the expected yield from cokers was determined by a simple laboratory test on the feedstock. As a result of Tulsa University's prior related research, a process model was developed that with additional work could be used to optimize existing delayed cokers over a wide range of potential feedstocks and operating conditions. The objectives of this research program are to: utilize the current micro, batch and pilot unit facilities at The University of Tulsa to enhance the understanding of the coking process; conduct additional micro and pilot unit tests with new and in-house resids and recycles to make current optimization models more robust; conduct focused kinetic experiments to enhance the furnace tube model and to enhance liquid production while minimizing sulfur in the products; conduct detailed foaming studies to optimize the process and minimize process upsets; quantify the parameters that affect coke morphology; and to utilize the knowledge gained from the experimental and modeling studies to enhance the computer programs developed in the previous JIP for optimization of the coking process. These refined computer models will then be tested against refinery data provided by the member companies. Novel concepts will also be explored for hydrogen sulfide removal of furnace gases as well as gas injection studies to reduce over-cracking.

Michael Volk; Keith Wisecarver

2004-09-26T23:59:59.000Z

150

Fundamentals of Delayed Coking Joint Industry Project  

SciTech Connect

Delayed coking evolved steadily over the early to mid 1900s to enable refiners to convert high boiling, residual petroleum fractions to light products such as gasoline. Pound for pound, coking is the most energy intensive of any operation in a modern refinery. Large amounts of energy are required to heat the thick, poor-quality petroleum residuum to the 900 to 950 degrees F required to crack the heavy hydrocarbon molecules into lighter, more valuable products. One common misconception of delayed coking is that the product coke is a disadvantage. Although coke is a low valued (near zero economic value) byproduct, compared to transportation fuels, there is a significant worldwide trade and demand for coke as it is an economical fuel. Coke production has increased steadily over the last ten years, with further increases forecast for the foreseeable future. Current domestic production is near 111,000 tons per day. A major driving force behind this increase is the steady decline in crude quality available to refiners. Crude slates are expected to grow heavier with higher sulfur contents while environmental restrictions are expected to significantly reduce the demand for high-sulfur residual fuel oil. Light sweet crudes will continue to be available and in even greater demand than they are today. Refiners will be faced with the choice of purchasing light sweet crudes at a premium price, or adding bottom of the barrel upgrading capability, through additional new investments, to reduce the production of high-sulfur residual fuel oil and increase the production of low-sulfur distillate fuels. A second disadvantage is that liquid products from cokers frequently are unstable, i.e., they rapidly form gum and sediments. Because of intermediate investment and operating costs, delayed coking has increased in popularity among refiners worldwide. Based on the 2000 Worldwide Refining Survey published in the Oil and Gas, the delayed coking capacity for 101 refineries around the world is 2,937,439 barrels/calendar day. These cokers produce 154,607 tons of coke per day and delayed coking accounts for 88% of the world capacity. The delayed coking charge capacity in the United States is 1,787,860 b/cd. Despite its wide commercial use, only relatively few contractors and refiners are truly knowledgeable in delayed-coking design, so that this process carries with it a ''black art'' connotation. Until recently, the expected yield from cokers was determined by a simple laboratory test on the feedstock. As a result of Tulsa University's prior related research, a process model was developed that with additional work could be used to optimize existing delayed cokers over a wide range of potential feedstocks and operating conditions. The objectives of this research program are to: utilize the current micro, batch and pilot unit facilities at The University of Tulsa to enhance the understanding of the coking process; conduct additional micro and pilot unit tests with new and in-house resids and recycles to make current optimization models more robust; conduct focused kinetic experiments to enhance the furnace tube model and to enhance liquid production while minimizing sulfur in the products; conduct detailed foaming studies to optimize the process and minimize process upsets; quantify the parameters that affect coke morphology; and to utilize the knowledge gained from the experimental and modeling studies to enhance the computer programs developed in the previous JIP for optimization of the coking process. These refined computer models will then be tested against refinery data provided by the member companies. Novel concepts will also be explored for hydrogen sulfide removal of furnace gases as well as gas injection studies to reduce over-cracking.

Michael Volk; Keith Wisecarver

2003-09-26T23:59:59.000Z

151

Coherence delay augmented laser beam homogenizer  

DOE Patents (OSTI)

The geometrical restrictions on a laser beam homogenizer are relaxed by ug a coherence delay line to separate a coherent input beam into several components each having a path length difference equal to a multiple of the coherence length with respect to the other components. The components recombine incoherently at the output of the homogenizer, and the resultant beam has a more uniform spatial intensity suitable for microlithography and laser pantogography. Also disclosed is a variable aperture homogenizer, and a liquid filled homogenizer.

Rasmussen, P.; Bernhardt, A.

1993-06-29T23:59:59.000Z

152

Coherence delay augmented laser beam homogenizer  

DOE Patents (OSTI)

The geometrical restrictions on a laser beam homogenizer are relaxed by ug a coherence delay line to separate a coherent input beam into several components each having a path length difference equal to a multiple of the coherence length with respect to the other components. The components recombine incoherently at the output of the homogenizer, and the resultant beam has a more uniform spatial intensity suitable for microlithography and laser pantogography. Also disclosed is a variable aperture homogenizer, and a liquid filled homogenizer.

Rasmussen, Paul (Livermore, CA); Bernhardt, Anthony (Berkeley, CA)

1993-01-01T23:59:59.000Z

153

State Control Design for Linear Systems with Distributed Time Delays  

E-Print Network (OSTI)

State Control Design for Linear Systems with Distributed Time Delays Daniel Gontkovic and Róbert with distributed time delays. Using an extended form of the Lyapunov- Krasovskii functional the controller design involving distributed time delays is a problem of large practical interest where intensive activity are done

Paris-Sud XI, Université de

154

Delay-dependent robust $$H_\\infty $$ control for 2-D discrete nonlinear systems with state delays  

Science Journals Connector (OSTI)

This paper investigates the problem of robust $$H_\\infty $$ control for a class of 2-D (two-dimensional) discrete state delayed systems with sector nonlinearity ... Keywords: $$H_\\infty $$ performance, 2D discrete systems, Exponential stability, State delays

Shipei Huang; Zhengrong Xiang

2014-10-01T23:59:59.000Z

155

Measurement of gas species, temperatures, coal burnout, and wall heat fluxes in a 200 MWe lignite-fired boiler with different overfire air damper openings  

SciTech Connect

Measurements were performed on a 200 MWe, wall-fired, lignite utility boiler. For different overfire air (OFA) damper openings, the gas temperature, gas species concentration, coal burnout, release rates of components (C, H, and N), furnace temperature, and heat flux and boiler efficiency were measured. Cold air experiments for a single burner were conducted in the laboratory. The double-swirl flow pulverized-coal burner has two ring recirculation zones starting in the secondary air region in the burner. As the secondary air flow increases, the axial velocity of air flow increases, the maxima of radial velocity, tangential velocity and turbulence intensity all increase, and the swirl intensity of air flow and the size of recirculation zones increase slightly. In the central region of the burner, as the OFA damper opening widens, the gas temperature and CO concentration increase, while the O{sub 2} concentration, NOx concentration, coal burnout, and release rates of components (C, H, and N) decrease, and coal particles ignite earlier. In the secondary air region of the burner, the O{sub 2} concentration, NOx concentration, coal burnout, and release rates of components (C, H, and N) decrease, and the gas temperature and CO concentration vary slightly. In the sidewall region, the gas temperature, O{sub 2} concentration, and NOx concentration decrease, while the CO concentration increases and the gas temperature varies slightly. The furnace temperature and heat flux in the main burning region decrease appreciably, but increase slightly in the burnout region. The NOx emission decreases from 1203.6 mg/m{sup 3} (6% O{sub 2}) for a damper opening of 0% to 511.7 mg/m{sup 3} (6% O{sub 2}) for a damper opening of 80% and the boiler efficiency decreases from 92.59 to 91.9%. 15 refs., 17 figs., 3 tabs.

Jianping Jing; Zhengqi Li; Guangkui Liu; Zhichao Chen; Chunlong Liu [Harbin Institute of Technology, Harbin (China). School of Energy Science and Engineering

2009-07-15T23:59:59.000Z

156

Delay time and Hartman effect in strain engineered graphene  

SciTech Connect

Tunneling times, including group delay and dwell time, are studied for massless Dirac electrons transmitting through a one-dimensional barrier in strain-engineered graphene. The Hartman effect, the independence of group delay on barrier length, is induced by the strain effect, and associated with the transmission gap and the evanescent mode. The influence of barrier height/length and strain modulus/direction on the group delay is also discussed, which provides the flexibility to control the group delay with applications in graphene-based devices. The relationship between group delay and dwell time is finally derived to clarify the nature of the Hartman effect.

Chen, Xi, E-mail: xchen@shu.edu.cn; Deng, Zhi-Yong [Department of Physics, Shanghai University, 200444 Shanghai (China); Ban, Yue, E-mail: yban@shu.edu.cn [Department of Electronic Information Materials, Shanghai University, 200444 Shanghai (China)

2014-05-07T23:59:59.000Z

157

Environmental Quality: Air (Louisiana)  

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

The Department of Environmental Quality regulates air quality in Louisiana. The Department has an established a fee system for funding the monitoring, investigation and other activities required...

158

Air-Quality Regulations  

Science Journals Connector (OSTI)

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

Jan W. Gooch

2011-01-01T23:59:59.000Z

159

Air-quality regulations  

Science Journals Connector (OSTI)

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

2007-01-01T23:59:59.000Z

160

International MODIS and AIRS processing package: AIRS products and applications  

E-Print Network (OSTI)

International MODIS and AIRS processing package: AIRS products and applications Elisabeth Weisz presented and discussed in this paper demonstrate that the IMAPP AIRS retrieval product is rigorously parameters from the operational AIRS L2 product and data from other instruments. Keywords: AIRS, IMAPP

Li, Jun

Note: This page contains sample records for the topic "air recirculation delay" 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

Clean air act and National Ambient Air Quality Standards (NAAQS)  

E-Print Network (OSTI)

Clean air act and National Ambient Air Quality Standards (NAAQS) Ozone: Sources/Environmental Effects Particulates (PM): Sources/Environmental Effects #12;National Ambient Air Quality Standards (NAAQS) The Clean Air Act requires EPA to set National Ambient Air Quality Standards for pollutants considered

Weber, Rodney

162

Compressed Air System Optimization  

E-Print Network (OSTI)

Several years ago I went to a gas station and noticed that my car's tires were low on air. I saw the gas station had an air compressor, but it cost a quarter to use the compressor. I paid my quarter and used the compressor. I realized...

Aegerter, R.

163

Portable oven air circulator  

DOE Patents (OSTI)

A portable air circulating apparatus for use in cooking ovens which is used to create air currents in the oven which transfer heat to cooking foodstuffs to promote more rapid and more uniform cooking or baking, the apparatus including a motor, fan blade and housing of metallic materials selected from a class of heat resistant materials.

Jorgensen, Jorgen A. (Bloomington, MN); Nygren, Donald W. (Minneapolis, MN)

1983-01-01T23:59:59.000Z

164

Meeting the Air Leakage  

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

Meeting the Air Leakage Meeting the Air Leakage Requirements of the 2012 IECC The U.S. Department of Energy (DOE) recognizes the enormous potential that exists for improving the energy efficiency, safety and comfort of homes. The newest edition of the International Energy Conservation Code ® (IECC) (2012) sets the bar higher for energy efficiency, and new air sealing requirements are one of the key new provisions. This guide is a resource for understanding the new air leakage requirements in the 2012 IECC and suggestions on how these new measures can be met. It also provides information from Building America's Air Sealing Guide, Best Practices and case studies on homes that are currently meeting the provisions. The 2012 IECC and a few International Residential Code (IRC) requirements are referenced throughout the guide.

165

Air Handling Unit Supply Air Temperature Optimization During Economizer Cycles  

E-Print Network (OSTI)

Air Handling Unit Supply Air Temperature Optimization during Economizer Cycles Gang Wang, Zhan Wang, Ke Xu and Mingsheng Liu University of Nebraska – Lincoln Omaha, Nebraska, USA ABSTRACT Most air handling units (AHUs) in commercial...

Xu, K.; Liu, M.; Wang, G.; Wang, Z.

2007-01-01T23:59:59.000Z

166

Air ejector augmented compressed air energy storage system  

DOE Patents (OSTI)

Energy is stored in slack demand periods by charging a plurality of underground reservoirs with air to the same peak storage pressure, during peak demand periods throttling the air from one storage reservoir into a gas turbine system at a constant inlet pressure until the air pressure in the reservoir falls to said constant inlet pressure, thereupon permitting air in a second reservoir to flow into said gas turbine system while drawing air from the first reservoir through a variable geometry air ejector and adjusting said variable geometry air ejector, said air flow being essentially at the constant inlet pressure of the gas turbine system.

Ahrens, Frederick W. (Naperville, IL); Kartsounes, George T. (Naperville, IL)

1980-01-01T23:59:59.000Z

167

Abatement of Air Pollution: Prohibition of Air Pollution (Connecticut)  

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

All air pollution not otherwise covered by these regulations is prohibited. Stationary sources which cause air pollution must be operated in accordance with all applicable emissions standards and...

168

Air Pollution and Health Effects  

Science Journals Connector (OSTI)

The quality of the air we breathe is still a major concern to human health. Notwithstanding the air pollution mitigation efforts that have been pursued since ... be attributed to the effects of urban outdoor air

Ana Isabel Miranda; Joana Valente…

2014-01-01T23:59:59.000Z

169

Air Quality (Nova Scotia, Canada)  

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

Nova Scotia Environment is responsible for monitoring the air quality in the province, as well as administering fines and permits relating to air quality. The Air Quality Regulations state...

170

Global air quality and climate  

E-Print Network (OSTI)

CRITICAL REVIEW Global air quality and climatewz Arlene M.determine regional air quality and can alter climate.to-continental scale air quality. Reducing the O 3 precursor

2012-01-01T23:59:59.000Z

171

Wastewater Renovation in Buried and Recirculating Sand Filters A.J. Gold,* B.E. Lamb,G.W.Loomis, J.R. Boyd, V.J. Cabelli, and C.G. McKiel  

E-Print Network (OSTI)

Wastewater Renovation in Buried and Recirculating Sand Filters A.J. Gold,* B.E. Lamb,G.W.Loomis, JF phagewereassociatedwithlowereffluent pHfor bothsandfilters. ON-SITEDISPOSALof household wastewater is a potential threat to public conditions mayimpede wastewater treatment (Kristiansen, 1981a; Pell and Nyberg, 1989a) or where

Gold, Art

172

Air heating system  

DOE Patents (OSTI)

A self-starting, fuel-fired, air heating system including a vapor generator, a turbine, and a condenser connected in a closed circuit such that the vapor output from the vapor generator is conducted to the turbine and then to the condenser where it is condensed for return to the vapor generator. The turbine drives an air blower which passes air over the condenser for cooling the condenser. Also, a condensate pump is driven by the turbine. The disclosure is particularly concerned with the provision of heat exchanger and circuitry for cooling the condensed fluid output from the pump prior to its return to the vapor generator.

Primeau, John J. (19800 Seminole Rd., Euclid, OH 44117)

1983-03-01T23:59:59.000Z

173

Water and Energy Savings using Demand Hot Water Recirculating Systems in Residential Homes: A Case Study of Five Homes in Palo Alto, California  

SciTech Connect

This report summarizes a preliminary study aimed at estimating the potential of saving potable water, (and the electrical energy used to heat it), that is presently lost directly to the drain while occupants wait for hot water to arrive at the faucet (point of use). Data were collected from five single-family homes in Palo Alto, California. Despite the small sample size in this study, the results make a compelling case for retrofitting homes with hot water recirculation systems to eliminate unnecessary wastage of water at the point of use. Technical as well as behavioral and attitudinal changes towards water conservation are necessary for a fulfilling and successful conservation effort. This report focuses on the technical issues, but behavioral issues are also noted, which may be factored into future studies involving local and state governments and utility companies.

Ally, M.R.

2002-11-14T23:59:59.000Z

174

Maintaining System Air Quality | Department of Energy  

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

Maintaining System Air Quality Maintaining System Air Quality This tip sheet discusses how to maintain air quality in compressed air systems through proper use of equipment....

175

Compressed Air Systems | Department of Energy  

Energy Savers (EERE)

Maintenance Strategies for Compressed Air Systems Remove Condensate with Minimal Air Loss Stabilizing System Pressure Compressed Air Training Compressed Air Systems Tools...

176

Compressed Air Storage Strategies | Department of Energy  

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

Storage Strategies Compressed Air Storage Strategies This tip sheet briefly discusses compressed air storage strategies. COMPRESSED AIR TIP SHEET 9 Compressed Air Storage...

177

Air Quality Rules (North Carolina)  

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

This is a comprehensive air quality rule for North Carolina that includes ambient air quality standards, emission control standards, monitoring and reporting requirements, and permitting procedures...

178

Ambient Air Quality Standards (Iowa)  

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

These regulations set statewide ambient air quality standards for various contaminants. The state code follows the regulations set forth in the National Primary and Secondary Ambient Air Quality...

179

Mitigation of Delayed Ettringite Formation in Laboratory Specimens .  

E-Print Network (OSTI)

??The objective of this study was to determine if the growth of delayed ettringite formation (DEF) in existing concrete can be reduced or even prevented… (more)

Shaikh, Hafiz

2007-01-01T23:59:59.000Z

180

Characterization of Delayed Ettringite Formation in Maryland Bridges .  

E-Print Network (OSTI)

??The research investigated the significance of Delayed Ettringite Formation (DEF) presences in the Maryland Bridge Inventory. The objective of the research included investigating possible presence… (more)

Ceary, Micah

2007-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "air recirculation delay" 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

Using Numerical Techniques to Accelerate Delayed Ettringnite Formation Test Methods.  

E-Print Network (OSTI)

??Delayed ettringite formation (DEF) in concrete can cause significant damage to structures. Finding the severity of the DEF is beneficial. Currently to measure the potential… (more)

Robertson, John Bret

2010-01-01T23:59:59.000Z

182

Padding with Compressed Air  

E-Print Network (OSTI)

We commonly find plants using padding to transport liquids or light solids short distances from tankers into storage tanks. Padding can wreck havoc in compressed air systems with limited storage, undersized cleanup equipment (dryers and filters...

Beals, C.

2004-01-01T23:59:59.000Z

183

Traffic air quality index  

Science Journals Connector (OSTI)

Abstract Vehicle emissions are responsible for a considerable share of urban air pollution concentrations. The traffic air quality index (TAQI) is proposed as a useful tool for evaluating air quality near roadways. The TAQI associates air quality with the equivalent emission from traffic sources and with street structure (roadway structure) as anthropogenic factors. The paper presents a method of determining the TAQI and defines the degrees of harmfulness of emitted pollution. It proposes a classification specifying a potential threat to human health based on the TAQI value and shows an example of calculating the TAQI value for real urban streets. It also considers the role that car traffic plays in creating a local UHI.

Zbigniew Bagie?ski

2015-01-01T23:59:59.000Z

184

Ventilation Air Preconditioning Systems  

E-Print Network (OSTI)

Ventilation Air Preconditioning Systems Mukesh Khattar Michael J. Brandemuehl Manager, Space Conditioning and Refrigeration Associate Professor Customer Systems Group Joint Center for Energy Management Electric Power Research Institute Campus... costs, the small, modular nature of the system allows great flexibility for fitting into retrofit geometries and saves space in new construction. Moreover, a single chiller can serve multiple air-handling units-in stark contrast to packaged...

Khattar, M.; Brandemuehl, M. J.

1996-01-01T23:59:59.000Z

185

Scattering and; Delay, Scale, and Sum Migration  

SciTech Connect

How do we see? What is the mechanism? Consider standing in an open field on a clear sunny day. In the field are a yellow dog and a blue ball. From a wave-based remote sensing point of view the sun is a source of radiation. It is a broadband electromagnetic source which, for the purposes of this introduction, only the visible spectrum is considered (approximately 390 to 750 nanometers or 400 to 769 TeraHertz). The source emits an incident field into the known background environment which, for this example, is free space. The incident field propagates until it strikes an object or target, either the yellow dog or the blue ball. The interaction of the incident field with an object results in a scattered field. The scattered field arises from a mis-match between the background refractive index, considered to be unity, and the scattering object refractive index ('yellow' for the case of the dog, and 'blue' for the ball). This is also known as an impedance mis-match. The scattering objects are referred to as secondary sources of radiation, that radiation being the scattered field which propagates until it is measured by the two receivers known as 'eyes'. The eyes focus the measured scattered field to form images which are processed by the 'wetware' of the brain for detection, identification, and localization. When time series representations of the measured scattered field are available, the image forming focusing process can be mathematically modeled by delayed, scaled, and summed migration. This concept of optical propagation, scattering, and focusing have one-to-one equivalents in the acoustic realm. This document is intended to present the basic concepts of scalar scattering and migration used in wide band wave-based remote sensing and imaging. The terms beamforming and (delayed, scaled, and summed) migration are used interchangeably but are to be distinguished from the narrow band (frequency domain) beamforming to determine the direction of arrival of a signal, and seismic migration in which wide band time series are shifted but not to form images per se. Section 3 presents a mostly graphically-based motivation and summary of delay, scale, and sum beamforming. The model for incident field propagation in free space is derived in Section 4 under specific assumptions. General object scattering is derived in Section 5 and simplified under the Born approximation in Section 6. The model of this section serves as the basis in the derivation of time-domain migration. The Foldy-Lax, full point scatterer scattering, method is derived in Section 7. With the previous forward models in hand, delay, scale, and sum beamforming is derived in Section 8. Finally, proof-of-principle experiments are present in Section 9.

Lehman, S K

2011-07-06T23:59:59.000Z

186

Delayed Radiation-Induced Vasculitic Leukoencephalopathy  

SciTech Connect

Purpose: Recently, single-fraction, high-dosed focused radiation therapy such as that administered by Gamma Knife radiosurgery has been used increasingly for the treatment of metastatic brain cancer. Radiation therapy to the brain can cause delayed leukoencephalopathy, which carries its own significant morbidity and mortality. While radiosurgery-induced leukoencephalopathy is known to be clinically different from that following fractionated radiation, pathological differences are not well characterized. In this study, we aimed to integrate novel radiographic and histopathologic observations to gain a conceptual understanding of radiosurgery-induced leukoencephalopathy. Methods and Materials: We examined resected tissues of 10 patients treated at Yale New Haven Hospital between January 1, 2009, and June 30, 2010, for brain metastases that had been previously treated with Gamma Knife radiosurgery, who subsequently required surgical management of a symptomatic regrowing lesion. None of the patients showed pathological evidence of tumor recurrence. Clinical and magnetic resonance imaging data for each of the 10 patients were then studied retrospectively. Results: We provide evidence to show that radiosurgery-induced leukoencephalopathy may present as an advancing process that extends beyond the original high-dose radiation field. Neuropathologic examination of the resected tissue revealed traditionally known leukoencephalopathic changes including demyelination, coagulation necrosis, and vascular sclerosis. Unexpectedly, small and medium-sized vessels revealed transmural T-cell infiltration indicative of active vasculitis. Conclusions: We propose that the presence of a vasculitic component in association with radiation-induced leukoencephalopathy may facilitate the progressive nature of the condition. It may also explain the resemblance of delayed leukoencephalopathy with recurring tumor on virtually all imaging modalities used for posttreatment follow-up.

Rauch, Philipp J. [Departments of Pathology and Neurosurgery, Yale University School of Medicine, New Haven, Connecticut (United States); Faculty of Medicine, University of Heidelberg, Heidelberg (Germany); Park, Henry S. [Departments of Pathology and Neurosurgery, Yale University School of Medicine, New Haven, Connecticut (United States); Knisely, Jonathan P.S. [Department of Radiation Medicine, North Shore University Hospital, Manhasset, New York (United States); Chiang, Veronica L. [Departments of Pathology and Neurosurgery, Yale University School of Medicine, New Haven, Connecticut (United States); Vortmeyer, Alexander O., E-mail: alexander.vortmeyer@yale.edu [Departments of Pathology and Neurosurgery, Yale University School of Medicine, New Haven, Connecticut (United States)

2012-05-01T23:59:59.000Z

187

Erasure of Time Delay Signatures in the Output of an Optoelectronic Feedback Laser with Modulated Delays and Chaos Synchronization  

E-Print Network (OSTI)

By studying the autocorrelation function of the optoelectronic feedback semiconductor laser output we establish that the signatures of time delays can be erased in systems incorporating modulated feedback time delays. This property is of importance for the suitability of such laser systems for secure chaos-based communication systems. We also make the first report on chaos synchronization in both unidirectionally and bidirectionally coupled multiple time delay chaotic semiconductor lasers with modulated optoelectronic feedbacks.

E. M. Shahverdiev; K. A. Shore

2009-06-17T23:59:59.000Z

188

Air Cooling | Open Energy Information  

Open Energy Info (EERE)

Cooling Cooling Jump to: navigation, search Dictionary.png Air Cooling: Air cooling is commonly defined as rejecting heat from an object by flowing air over the surface of the object, through means of convection. Air cooling requires that the air must be cooler than the object or surface from which it is expected to remove heat. This is due to the second law of thermodynamics, which states that heat will only move spontaneously from a hot reservoir (the heat sink) to a cold reservoir (the air). Other definitions:Wikipedia Reegle Air Cooling Air Cooling Diagram of Air Cooled Condenser designed by GEA Heat Exchangers Ltd. (http://www.gea-btt.com.cn/opencms/opencms/bttc/en/Products/Air_Cooled_Condenser.html) Air cooling is limited on ambient temperatures and typically require a

189

AIR SEALING Seal air leaks and save energy!  

E-Print Network (OSTI)

AIR SEALING Seal air leaks and save energy! W H A T I S A I R L E A K A G E ? Ventilation is fresh at stopping air leakage. It is critical to seal all holes and seams between these sheet goods with durable air that enters a house in a controlled manner to exhaust excess moisture and reduce odors

Oak Ridge National Laboratory

190

inAir: Sharing Indoor Air Quality Measurements and Visualizations  

E-Print Network (OSTI)

evidence has indicated that indoor air pollution within homes and other buildings can be worse than the outdoor air pollution in even the largest and most industrialized cities. For example, the California Air Resources Board estimates that indoor air pollutant levels are 25-62% greater than outside levels [4

Mankoff, Jennifer

191

Air Quality: Air Pollutants, SLAC Emissions Sources, and Regulatory Reference  

E-Print Network (OSTI)

permit regulations are designed to track, record, and control air pollutants belonging to severalAir Quality: Air Pollutants, SLAC Emissions Sources, and Regulatory Reference Department: Chemical on chemical classifications. This reference outlines major categories of air pollutants found at SLAC

Wechsler, Risa H.

192

PERFORMANCE EVALUATION OF AN AIR-TO-AIR HEAT PUMP COUPLED WITH TEMPERATE AIR-SOURCES INTEGRATED INTO A DWELLING  

E-Print Network (OSTI)

PERFORMANCE EVALUATION OF AN AIR-TO-AIR HEAT PUMP COUPLED WITH TEMPERATE AIR-SOURCES INTEGRATED.peuportier@mines-paristech.fr, Tel.: +33 1 40 51 91 51 ABSTRACT An inverter-driven air-to-air heat pump model has been developped capacity air-to-air heat pump coupled with temperate air sources (crawlspace, attic, sunspace, heat

Paris-Sud XI, Université de

193

EMISSIONS TO AIR OPERATIONAL PROCEDURE  

E-Print Network (OSTI)

EMISSIONS TO AIR OPERATIONAL PROCEDURE Swansea University Estates Services Singleton Park Swansea to Air Department: Estates and Facilities Site: All Author: Ambreen Jahangir Approved by: Mark Durdin PURPOSE: To minimise emissions and discharges to air from boilers, fume cupboards, air conditioning

Harman, Neal.A.

194

Air Quality | Open Energy Information  

Open Energy Info (EERE)

Retrieved from "http:en.openei.orgwindex.php?titleAirQuality&oldid612070" Category: NEPA Resources...

195

Adapting a delay-based protocol to heterogeneous environments  

E-Print Network (OSTI)

with different mixes of PERT and SACK protocols. Delay-based protocols, being less aggressive, have problems in fully utilizing a highspeed link while operating alone. We show that a single PERT flow can fully utilize a high-speed, high-delay link. We performed...

Kotla, Kiran

2008-10-10T23:59:59.000Z

196

A structural approach to delay optimization in combinational circuits  

E-Print Network (OSTI)

about the area penalty incurred due to delay optimization. The experiments were performed on a SPARC-20 workstation. 1. Comparison with Delay Optimization Script in SIS 1. 3 We applied LOD to the two-input gate versions of the benchmark circuits...

Munshi, Avinash

1999-01-01T23:59:59.000Z

197

M/M/1 Queueing System with Delayed Controlled Vacation  

E-Print Network (OSTI)

M/M/1 Queueing System with Delayed Controlled Vacation Yonglu Deng , Zhongshan University W. John systems using a time division multiple access (TDMA) scheme (Frey and Takahashi, [7]). Researchers have that of a server's cold switch-on. The case of delayed vacation has also very recently been studied by Frey

Zhao, Yiqiang Q.

198

Utility Maximization for Delay Constrained QoS in Wireless  

E-Print Network (OSTI)

Utility Maximization for Delay Constrained QoS in Wireless I-Hong Hou CSL and Department of CS of utility maxi- mization for clients with delay based QoS requirements in wireless networks. We adopt that the utility of a client is a function of the timely throughput it obtains. We treat the timely throughput

199

Stability and bifurcation of genetic regulatory networks with delays  

Science Journals Connector (OSTI)

A four-dimension genetic regulatory network model with double genes and four delays is considered. The existence of Hopf bifurcation is first considered and then explicit formulas are derived by using the normal form method and center manifold theory ... Keywords: Genetic regulatory networks, Hopf bifurcation, Periodic solution, Time delay

Kai Wang; Lei Wang; Zhidong Teng; Haijun Jiang

2010-10-01T23:59:59.000Z

200

Short communication Dynamics of microbubble oscillators with delay coupling  

E-Print Network (OSTI)

Differential delay equation Perturbation theory Hopf bifurcation a b s t r a c t We investigate the stability of the in-phase mode in a system of two delay-coupled bubble oscillators. The bubble oscillator model to travel from one bubble to another through the liquid medium that surrounds them. Using techniques from

Rand, Richard H.

Note: This page contains sample records for the topic "air recirculation delay" 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

Convex Delay Models for Transistor Sizing Mahesh Ketkar  

E-Print Network (OSTI)

for developing accurate con- vex delay models to be used for transistor sizing. A new rich class of convex]: minimize Area or Power subject to Delay Tspec: (1) There have been many significant attempts to solve. in the development of closed form models for inverters and then mapping other gates to an equivalent inverter [5, 6

Sapatnekar, Sachin

202

Target Tracking Using Delayed Measurements with Implicit Constraints  

E-Print Network (OSTI)

with a negligible delay, since the speed of light is much larger than the speed of the target. This contribution the speed of light is much larger than the speed of the target. One further example relating to sensor speed (Doppler measurement). The delay k can be described as a function of the position (and hence

Gustafsson, Fredrik

203

Delays associated with elementary processes in nuclear reaction simulations  

SciTech Connect

Scatterings, particularly those involving resonances, and other elementary processes do not happen instantaneously. In the context of semiclassical nuclear reaction simulations, we consider delays associated with an interaction for incident quantum wave packets. As a consequence, we express delays associated with elementary processes in terms of elements of the scattering matrix and phase shifts for elastic scattering. We show that, within the second order in density, the simulation must account for delays in scattering consistently with the mean field in order to properly model thermodynamic properties such as pressure and free-energy density. Delays associated with nucleon-nucleon and pion-nucleon scattering in free space are analyzed with their nontrivial energy dependence. Finally, an example of {ital s}-channel scattering of massless partons is studied, and scattering schemes in nuclear reaction simulations are investigated in the context of scattering delays. {copyright} {ital 1996 The American Physical Society.}

Danielewicz, P.; Pratt, S. [National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824 (United States)] [National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824 (United States); [Grand Accelerateur National dIons Lourds (GANIL), BP 5027, F-14021 Caen Cedex (France)

1996-01-01T23:59:59.000Z

204

Next Generation Strong Lensing Time Delay Estimation with Gaussian Processes  

E-Print Network (OSTI)

Strong gravitational lensing forms multiple, time delayed images of cosmological sources, with the "focal length" of the lens serving as a cosmological distance probe. Robust estimation of the time delay distance can tightly constrain the Hubble constant as well as the matter density and dark energy. Current and next generation surveys will find hundreds to thousands of lensed systems but accurate time delay estimation from noisy, gappy lightcurves is potentially a limiting systematic. Using a large sample of blinded lightcurves from the Strong Lens Time Delay Challenge we develop and demonstrate a Gaussian Process crosscorrelation technique that delivers an average bias within 0.1% depending on the sampling, necessary for subpercent Hubble constant determination. The fits are accurate (80% of them within 1 day) for delays from 5-100 days and robust against cadence variations shorter than 6 days. We study the effects of survey characteristics such as cadence, season, and campaign length, and derive requiremen...

Hojjati, Alireza

2014-01-01T23:59:59.000Z

205

Compressed air energy storage system  

DOE Patents (OSTI)

An internal combustion reciprocating engine is operable as a compressor during slack demand periods utilizing excess power from a power grid to charge air into an air storage reservoir and as an expander during peak demand periods to feed power into the power grid utilizing air obtained from the air storage reservoir together with combustible fuel. Preferably the internal combustion reciprocating engine is operated at high pressure and a low pressure turbine and compressor are also employed for air compression and power generation.

Ahrens, Frederick W. (Naperville, IL); Kartsounes, George T. (Naperville, IL)

1981-01-01T23:59:59.000Z

206

Periodically Intermittent Stabilization of Delayed Neural Networks Based on Piecewise Lyapunov Functions/Functionals  

Science Journals Connector (OSTI)

This paper is concerned with the stabilization problem of delayed neural networks via a periodically intermittent controller. Two cases of time-varying bounded delays are considered: one is the time-varying delay without any constraints on the delay ... Keywords: Delayed neural networks, Intermittent control, Linear matrix inequalities, Piecewise Lyapunov functions/functionals

Wu-Hua Chen, Jiacheng Zhong, Zhiyong Jiang, Xiaomei Lu

2014-12-01T23:59:59.000Z

207

Air Charter Services  

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

42.2 (April 2012) 42.2 (April 2012) 1 Documentation and Approval of Federally Funded International Travel (Fly America Act-Open Skies Agreement) Overview This section provides guidance to DOE Contracting Officers, Contracting Officer Representatives, and Program Officials on documentation and approval of federally funded international travel by Federal contractors and subcontractors in accordance with FAR 52.247-63 PREFERENCE FOR U.S.-FLAG AIR CARRIERS (JUNE 2003), 49 U.S.C. §40118 (Fly America Act) and the Open Skies Agreements as amended. Background Contracts that include FAR clause 52.247-63, PREFERENCE FOR U.S.-FLAG AIR CARRIERS (JUNE 2003) as prescribed in FAR 47.405 require that, if available, the Contractor (and subcontractors), in performing work under the contract, shall use U.S.-flag air carriers for

208

air_water.cdr  

Office of Legacy Management (LM)

12/2011 12/2011 Air Monitoring Groundwater Monitoring Surface Water Monitoring A continuously operating air monitoring network was in place from 1986 through 2000 for the Weldon Spring Site Remedial Action Project (WSSRAP) to measure levels of gamma radiation, radioactive dust particles, radon gas, and asbestos. With remediation of contaminated materials essentially complete and measurements indistinguishable from background, the U.S. Department of Energy (DOE) ceased perimeter and offsite air monitoring as of December 31, 2000. Groundwater has been routinely monitored at the site since 1986. Separate groundwater monitoring programs were established for the Chemical Plant and Quarry sites because of geographic separation and differences in the hydrogeologic features that influence

209

Syneresis and delayed detachment in agar plates  

E-Print Network (OSTI)

Biogels made of crosslinked polymers such as proteins or polysaccharides behave as porous soft solids and store large amount of solvent. These gels undergo spontaneous aging, called syneresis that consists in the shrinkage of the gel matrix and the progressive expulsion of the solvent, which eventually leads to the gel detachment from its container. Here we report on the syneresis phenomena in agar plates that consist in Petri dishes filled with a gel mainly composed of agar. Direct observations and speckle pattern correlation analyses allow us to rationalize the delayed detachment of the gel from the sidewall of the Petri dish. The detachment time $t^*$ is mainly controlled by the gel minimum thickness $e_{min}$ along the periphery of the plate: $t^*$ increases as a robust function of $e_{min}$ that neither depends on the age of the gel nor on any previous mass loss. Time-resolved correlation spectroscopy reveals that the speckle decorrelation rate increases a few hours before $t^*$ and that the gel detachment can be anticipated. This work provides quantitative observables to predict the shelf life of agar plates and highlights the key role of the competition between the syneresis and the gel adhesion to the wall in the detachment process.

Thibaut Divoux; Bosi Mao; Patrick Snabre

2014-10-30T23:59:59.000Z

210

Sticking with air  

SciTech Connect

A decision to replace more than 300 aging damper actuators at Independence Plant in Newark, Arkensas forced Entergy to make a choice between pneumatic and electric actuator designs. The dampers route air flow through separate dedicated compartments to ensure proper firing of pulverised coal. The reasons that pneumatics was chosen are discussed in this article. 4 figs.

Coker, S.N. [Entergy (US). Independence Plant

2005-06-01T23:59:59.000Z

211

The air plasma spraying  

Science Journals Connector (OSTI)

The air plasma spraying is characterized by using of a compressed air as a plasma forming gas. Here is shown the application of benefits of the present technology compared with other spraying process. The creation of the present process was possible due to a reliable plasma torch and certain condition of heating and deposition of powder materials on a work. Plasma torch develops a power up to 50 kW and can work during 14 hours without replacement of a cathode and during 25 hours as for an anode what is acceptable for industrial application. When spraying of coatings a minimum waste of alloying elements is attained with slight increase of oxygen in coating which is comparable with argon plasma spraying in the open. In certain cases the air plasma spraying allows to obtain more perfect coatings and at high performance. The present method finds large application at restoration and strengthening of machine parts, at forming of components etc. The air plasma spraying provides high quality coatings at low cost of components.

Valery S. Klubnikin

1993-01-01T23:59:59.000Z

212

Canned Air in China  

E-Print Network (OSTI)

Broadcast Transcript: Not that long ago, coal smoke made the air here in Beijing so caustic that your nasal passages were seared with each breath. Those were the good old days: Car ownership was limited to government officials and the rest...

Hacker, Randi

2013-10-23T23:59:59.000Z

213

ALKALI AGGREGATE REACTION AND DELAYED ETTRINGITE FORMATION: COMMON FEATURES AND DIFFERENCES  

E-Print Network (OSTI)

ALKALI AGGREGATE REACTION AND DELAYED ETTRINGITE FORMATION: COMMON FEATURES AND DIFFERENCES Renaud Department, Paris, France Abstract Alkali-Aggregate Reaction (AAR) and Delayed Ettringite Formation (DEF effects 1 INTRODUCTION Alkali Aggregate Reaction (AAR) and Delayed Ettringite Formation (DEF) are internal

Paris-Sud XI, Université de

214

Exact emulation of a priority queue with a switch and delay lines  

E-Print Network (OSTI)

has to be at least one delay line of length 1, so L 1 = 1.which are all in the delay lines numbered 1, 2, . . . ,m. Thus these delay lines are “full”. Suppose that at time t

Sarwate, A D; Anantharam, V

2006-01-01T23:59:59.000Z

215

Design of coupling for synchronization in time-delayed systems  

E-Print Network (OSTI)

We report a design of delay coupling for targeting desired synchronization in delay dynamical systems. We target synchronization, antisynchronization, lag-, antilag- synchronization, amplitude death (or oscillation death) and generalized synchronization in mismatched oscillators. A scaling of the size of an attractor is made possible in different synchronization regimes. We realize a type of mixed synchronization where synchronization, antisynchronization coexist in different pairs of state variables of the coupled system. We establish the stability condition of synchronization using the Krasovskii-Lyapunov function theory and the Hurwitz matrix criterion. We present numerical examples using the Mackey-Glass system and a delay R\\"{o}ssler system.

Dibakar Ghosh; Ioan Grosu; Syamal Kumar Dana

2012-07-03T23:59:59.000Z

216

Revival of Classical Vortex Generators Now for Transition Delay  

Science Journals Connector (OSTI)

Classical vortex generators, known for their efficiency in delaying or even inhibiting boundary layer separation, are here shown to be coveted devices for transition to turbulence delay. The present devices are miniature with respect to classical vortex generators but are tremendously powerful in modulating the laminar boundary layer in the direction orthogonal to the base flow and parallel to the surface. The modulation generates an additional term in the perturbation energy equation, which counteracts the wall-normal production term and, hence, stabilizes the flow. Our experimental results show that these devices are really effective in delaying transition, but we also reveal their Achilles’ heel.

Shahab Shahinfar; Sohrab S. Sattarzadeh; Jens H. M. Fransson; Alessandro Talamelli

2012-08-16T23:59:59.000Z

217

Electronic Implementation of the Mackey-Glass Delayed Model  

E-Print Network (OSTI)

The celebrated Mackey-Glass model describes the dynamics of physiological \\textit{delayed} systems in which the actual evolution depends on the values of the variables at some \\textit{previous} times. This kind of systems are usually expressed by delayed differential equations which turn out to be infinite-dimensional. In this contribution, an electronic implementation mimicking the Mackey-Glass model is proposed. New approaches for both the nonlinear function and the delay block are made. Explicit equations for the actual evolution of the implementation are derived. Simulations of the original equation, the circuit equation, and experimental data show great concordance.

Pablo Amil; Cecilia Cabeza; Arturo C. Martí

2014-08-21T23:59:59.000Z

218

Industrial HVAC Air-to-Air Energy Recovery Retrofit Economics  

E-Print Network (OSTI)

Retrofitting air-to-air energy recovery equipment is relatively simply to design and easy to install. Additionally, HVAC energy recovery is almost risk free when compared to process retrofit. Life cycle cost analysis is the best way to illustrate...

Graham, E. L.

1980-01-01T23:59:59.000Z

219

Compressed Air 101: Getting Compressed Air to Work  

E-Print Network (OSTI)

"Air compressors are a significant industrial energy user. Based on a survey (conducted by Oregon State University and the Bonneville Power Administration) of energy audit reports from 125 plants, air compressors account for roughly 10% of total...

Burke, J. J.; Bessey, E. G.

220

Vermont Air Pollution Control Regulations, Ambient Air Quality Standards (Vermont)  

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

The ambient air quality standards are based on the national ambient air quality standards. The Vermont standards are classified as primary and secondary standards and judged adequate to protect...

Note: This page contains sample records for the topic "air recirculation delay" 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

Coke-free dry reforming of model diesel fuel by a pulsed spark plasma at low temperatures using an exhaust gas recirculation (EGR) system  

Science Journals Connector (OSTI)

Dry reforming of diesel fuel, an endothermic reaction, is an attractive process for on-board hydrogen/syngas production to increase energy efficiency. For operating this dry reforming process in a vehicle, we can use the exhaust gas from an exhaust gas recirculation (EGR) system as a source of carbon dioxide. Catalytic dry reforming of heavy hydrocarbon is a very difficult reaction due to the high accumulation of carbon on the catalyst. Therefore, we attempted to use a non-equilibrium pulsed plasma for the dry reforming of model diesel fuel without a catalyst. We investigated dry reforming of model diesel fuel (n-dodecane) with a low-energy pulsed spark plasma, which is a kind of non-equilibrium plasma at a low temperature of 523?K. Through the reaction, we were able to obtain syngas (hydrogen and carbon monoxide) and a small amount of C2 hydrocarbon without coke formation at a ratio of CO2/Cfuel = 1.5 or higher. The reaction can be conducted at very low temperatures such as 523?K. Therefore, it is anticipated as a novel and effective process for on-board syngas production from diesel fuel using an EGR system.

Yasushi Sekine; Naotsugu Furukawa; Masahiko Matsukata; Eiichi Kikuchi

2011-01-01T23:59:59.000Z

222

Environmental Pollution Air Pollution Dispersion Practical Air Pollution Dispersion  

E-Print Network (OSTI)

Environmental Pollution Air Pollution Dispersion 1 of 5 Practical ­ Air Pollution Dispersion in the lectures how such models can be used to explain observed concentrations of air pollutants in an area and to test `what-if' scenarios for pollution control and reduction. You will use the Gaussian Plume Model

Moncrieff, John B.

223

MHK Technologies/Tidal Delay | Open Energy Information  

Open Energy Info (EERE)

Delay Delay < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage Tidal Delay.png Technology Profile Primary Organization Woodshed Technologies Ltd Technology Resource Click here Current Technology Type Click here Overtopping Technology Readiness Level Click here TRL 1 3 Discovery Concept Def Early Stage Dev Design Engineering Technology Description The Tidal Delay utilizes an existing natural land formation such as a peninsula or isthmus that creates a natural tidal barrier separating moving rising and falling bodies of seawater As the seawater on each side of the natural barrier rises and falls the device captures the energy resulting from the difference in water levels across the barrier using proven hydroelectric technology The device utilizes a standard impulse turbine installed in siphon pipe over under the natural barrier

224

Ionizing Radiation Induces Delayed Hyperrecombination in Mammalian Cells  

Science Journals Connector (OSTI)

...instability is critical to radiation risk assessment and for determining...the many delayed effects of radiation, chromosomal instability is...detrimental effects over a range of doses of ionizing radiation. Furthermore, a rapid and...

Lei Huang; Suzanne Grim; Leslie E. Smith; Perry M. Kim; Jac A. Nickoloff; Olga G. Goloubeva; William F. Morgan

2004-06-01T23:59:59.000Z

225

Delayed neutron energy spectrum measurements of actinide waste isotopes  

E-Print Network (OSTI)

was irradiated using the Texas A&M Nuclear Science Center Reactor (NSCR). Three proton recoil detectors, operating individually, in conjunction with MCNP calculated response functions, were used to measure the delayed neutron energy spectra of each isotope...

Comfort, Christopher M.

2012-06-07T23:59:59.000Z

226

Delayed hydride cracking behavior for ZIRCALOY-2 tubing  

Science Journals Connector (OSTI)

The delayed hydride cracking (DHC) behavior for ZIRCALOY-2 tubing was characterized at temperatures ranging from 93 °C to 288 °C. Testing was performed on the three types of pressure tubes that were used in th...

F. H. Huang; W. J. Mills

1991-09-01T23:59:59.000Z

227

Utilization-based delay guarantee techniques and their applications  

E-Print Network (OSTI)

have become popular for both civilian and mission critical applications. The variable service capacity of a wireless link presents more of a challenge in providing delay-guaranteed services in wireless networks. Finally, we study ways to provide...

Wang, Shengquan

2009-05-15T23:59:59.000Z

228

Implementation of a fiber-optic delay-line memory  

Science Journals Connector (OSTI)

The construction and operation of a 50-MHz 64 × 16 bit fiber-optic bit-serial delay-line memory is described. It consists of LiNbO3 directional coupler switches, fused-fiber...

Soukup, T J; Feuerstein, R J; Heuring, V P

1992-01-01T23:59:59.000Z

229

Air Conditioning | Department of Energy  

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

Conditioning Conditioning Air Conditioning July 1, 2012 - 6:28pm Addthis Air conditioners cost U.S. homeowners more than $11 billion each year, and regular maintenance can keep your air conditioner running efficiently. | Photo courtesy of ©iStockphoto/JaniceRichard Air conditioners cost U.S. homeowners more than $11 billion each year, and regular maintenance can keep your air conditioner running efficiently. | Photo courtesy of ©iStockphoto/JaniceRichard How does it work? An air conditioner uses energy -- usually electricity -- to transfer heat from the interior of your home to the relatively warm outside environment. Two-thirds of all homes in the United States have air conditioners. Air conditioners use about 5% of all the electricity produced in the United States, at an annual cost of more than $11 billion to homeowners. As a

230

Louisiana Air Control Law (Louisiana)  

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

This law states regulations for air quality control and states the powers and duties of the secretary of environmental quality. It provides information about permits and licenses, air quality...

231

Air Pollution Indicator: PM10  

Science Journals Connector (OSTI)

As one of natural elements, clean air is essential to human beings’ survival. ... , almost all economic and social activities emit air pollutants, especially such sectors as power and ... and international commun...

Hezhong Tian; Yimeng Liu

2014-01-01T23:59:59.000Z

232

Air Liquide- Biogas & Fuel Cells  

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

Presentation about Air Liquide's biogas technologies and integration with fuel cells. Presented by Charlie Anderson, Air Liquide, at the NREL/DOE Biogas and Fuel Cells Workshop held June 11-13, 2012, in Golden, Colorado.

233

Solar Heating and Air Conditioning  

Science Journals Connector (OSTI)

...given of the status of solar fired air conditioning...to an approach to cool storage in solar air conditioning systems...an assessment of cool storage for reducing peak electrical...rolling cylinder thermal energy storage device for compact...

1980-01-01T23:59:59.000Z

234

Compressed Air Audits using AIRMaster  

E-Print Network (OSTI)

Air compressors are a significant industrial energy user and therefore a prime target for industrial energy audits. The project goal was to develop a software tool, AIRMaster, and supporting methodology for performing compressed air system audits...

Wheeler, G. M.; McGill, R. D.; Bessey, E. G.; Vischer, K.

235

Fundamentals of Compressed Air Systems  

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

Find out how a compressed air system works and the benefits of optimal compressed air system performance. This initial class demonstrates how to compute the current cost of your plant's compressed...

236

Roadway tunnel air quality models  

Science Journals Connector (OSTI)

Roadway tunnel air quality models ... Analysis of 13 tunnel studies quantifies the decline since 1961 in benzo[a]pyrene emitted into the air per km of travel by U.S. road vehicles. ...

Tai Y. Chang; Sara J. Rudy

1990-05-01T23:59:59.000Z

237

Identifying delayed directional couplings with symbolic transfer entropy  

Science Journals Connector (OSTI)

We propose a straightforward extension of symbolic transfer entropy to enable the investigation of delayed directional relationships between coupled dynamical systems from time series. Analyzing time series from chaotic model systems, we demonstrate the applicability and limitations of our approach. Our findings obtained from applying our method to infer delayed directed interactions in the human epileptic brain underline the importance of our approach for improving the construction of functional network structures from data.

Henning Dickten and Klaus Lehnertz

2014-12-08T23:59:59.000Z

238

Compressed Air System Control Strategies  

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

This tip sheet briefly discusses compressed air system control strategies as a means to improving and maintaining system performance.

239

Compressed Air Energy Storage System  

E-Print Network (OSTI)

/expanders are crucial for the economical viability of a Compressed Air Energy Storage (CAES) system such as the

Farzad A. Shirazi; Mohsen Saadat; Bo Yan; Perry Y. Li; Terry W. Simon

240

Analyzing Your Compressed Air System  

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

This tip sheet outlines the process to analyze industrial compressed air systems and ensure proper system configuration.

Note: This page contains sample records for the topic "air recirculation delay" 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

Air Leaks in Unexpected Places  

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

Sealing air leaks will help to decrease heating and cooling costs and make your home more comfortable.

242

AIR QUALITY REPORT SPARKS CONTROVERSY  

Science Journals Connector (OSTI)

AIR QUALITY REPORT SPARKS CONTROVERSY ... The National Commission on Air Quality delivered its eagerly awaited report to Congress today, and reaction from industry and environmental groups is expected to be both swift and sharp. ... Created under the 1977 Clean Air Act, the commission was charged with assessing the effectiveness of the law, and recommending changes where the law falls short of achieving the goal of improving the nation's air quality. ...

1981-03-02T23:59:59.000Z

243

Air-Lift design theory  

Science Journals Connector (OSTI)

1. Employing graphical relationships between height of lift of the emulsion, depth of shaft, and specific air ra...

P. R. Khlopenkov

1970-10-01T23:59:59.000Z

244

The Viscosity of Air  

Science Journals Connector (OSTI)

The viscosity of air has been remeasured with the rotating cylinder apparatus used by Day and Bleakney. All of the constants have been redetermined, and especial attention has been given to the corrections to the simple theory. The value obtained at 22°C is ?=1.8243±0.0045 c.g.s. units. This raises the oil drop value of e to 4.796 e.s.u. It is shown in the appendix that a correction must be applied for the opening between the suspended cylinder and the guard cylinders, and also a correction must be applied for the moment of inertia of the air carried around by the cylinder when determining its moment of inertia. Neglect of these corrections has introduced some additional uncertainty into other work.

W. V. Houston

1937-10-01T23:59:59.000Z

245

FLUIDIC: Metal Air Recharged  

SciTech Connect

Fluidic, with the help of ARPA-E funding, has developed and deployed the world's first proven high cycle life metal air battery. Metal air technology, often used in smaller scale devices like hearing aids, has the lowest cost per electron of any rechargeable battery storage in existence. Deploying these batteries for grid reliability is competitive with pumped hydro installations while having the advantages of a small footprint. Fluidic's battery technology allows utilities and other end users to store intermittent energy generated from solar and wind, as well as maintain reliable electrical delivery during power outages. The batteries are manufactured in the US and currently deployed to customers in emerging markets for cell tower reliability. As they continue to add customers, they've gained experience and real world data that will soon be leveraged for US grid reliability.

Friesen, Cody

2014-03-07T23:59:59.000Z

246

FLUIDIC: Metal Air Recharged  

ScienceCinema (OSTI)

Fluidic, with the help of ARPA-E funding, has developed and deployed the world's first proven high cycle life metal air battery. Metal air technology, often used in smaller scale devices like hearing aids, has the lowest cost per electron of any rechargeable battery storage in existence. Deploying these batteries for grid reliability is competitive with pumped hydro installations while having the advantages of a small footprint. Fluidic's battery technology allows utilities and other end users to store intermittent energy generated from solar and wind, as well as maintain reliable electrical delivery during power outages. The batteries are manufactured in the US and currently deployed to customers in emerging markets for cell tower reliability. As they continue to add customers, they've gained experience and real world data that will soon be leveraged for US grid reliability.

Friesen, Cody

2014-04-02T23:59:59.000Z

247

Air Pollution & Health in Rapidly Developing Countries  

E-Print Network (OSTI)

For example, “Air Pollution and Health – Studies in theAssessment of Air Pollution and Health” is illustrative inReview: Air Pollution & Health in Rapidly Developing

Bucher, Scott

2005-01-01T23:59:59.000Z

248

California Air Resources Board | Open Energy Information  

Open Energy Info (EERE)

Air Resources Board Jump to: navigation, search Logo: California Air Resources Board Name: California Air Resources Board Place: Sacramento, California Website: http:...

249

113 air quality control station [n  

Science Journals Connector (OSTI)

envir. (Facility for measurement of air pollution; ? air quality network/system );s estación [f] de medición de la calidad del aire (? red de ev...

2010-01-01T23:59:59.000Z

250

ORIGINAL ARTICLE Ambient Air Pollution  

E-Print Network (OSTI)

supporting an association between am- bient air pollution and cardiovascular health, much re- mains health effects of ambient air pollution in Atlanta being undertaken by this Emory investi- gative teamORIGINAL ARTICLE Ambient Air Pollution and Cardiovascular Emergency Department Visits Kristi Busico

Mulholland, James A.

251

Air Pollution Control Regulations: No. 22 - Air Toxics (Rhode Island) |  

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

Air Pollution Control Regulations: No. 22 - Air Toxics (Rhode Air Pollution Control Regulations: No. 22 - Air Toxics (Rhode Island) Air Pollution Control Regulations: No. 22 - Air Toxics (Rhode Island) < Back Eligibility Commercial Industrial Investor-Owned Utility Municipal/Public Utility Rural Electric Cooperative Utility Program Info State Rhode Island Program Type Siting and Permitting Provider Department of Environmental Management Permits are required to construct, install, or modify any stationary source which has the potential to increase emissions of a listed toxic air contaminant by an amount greater than the minimum quantity for that contaminant. Minimum quantities are specified in Table III of these regulations. Permits will be granted based in part on the impact of the projected emissions of the stationary source on acceptable ambient levels

252

Delayed Light Studies on Photosynthetic Energy Conversion VI. Effects of Phosphorylation Inhibitors on Delayed Light in the Millisecond Time Range  

Science Journals Connector (OSTI)

The delayed light which ARNOLD and STREHLER found in 1951 ... being recognized as a reliable measure of photosynthetic energy storage between loss of excitation from the ... NORRIS 1963) and production of chemica...

R. Wells; W. Bertsch; W. Cohen

1972-01-01T23:59:59.000Z

253

Air Risk Information Support Center  

SciTech Connect

The Air Risk Information Support Center (Air RISC) was initiated in early 1988 by the US Environmental Protection Agency`s (EPA) Office of Health and Environmental Assessment (OHEA) and the Office of Air Quality Planning and Standards (OAQPS) as a technology transfer effort that would focus on providing information to state and local environmental agencies and to EPA Regional Offices in the areas of health, risk, and exposure assessment for toxic air pollutants. Technical information is fostered and disseminated by Air RISCs three primary activities: (1) a {open_quotes}hotline{close_quotes}, (2) quick turn-around technical assistance projects, and (3) general technical guidance projects. 1 ref., 2 figs.

Shoaf, C.R.; Guth, D.J. [Environmental Protection Agency, Washington, DC (United States)

1990-12-31T23:59:59.000Z

254

Urban and Regional Air Quality  

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

equipment equipment Urban and Regional Air Quality Research in this area is concerned with regional air quality issues such as: Controlling nitrogen oxides (NOx) and volatile organic compounds, to manage tropospheric ozone pollution. Hazardous air pollutants: using science to base standards on rigorously studied risks. Air quality and climate: how does climate influence air quality at a regional or local level? Current modeling practices often do not capture variations in pollutants such as ozone-they represent a limited sample of the diverse meteorology and human behavior that affect air pollution. Improved modeling of regional air quality will help understand variability, reveal patterns of behavior, and pollutant transport issues. Controlled experiments in lab and field can help validate improved models.

255

Clean Air Act | Department of Energy  

Office of Environmental Management (EM)

Clean Air Act Clean Air Act The primary law governing the Department of Energy (DOE) air pollution control activities is the Clean Air Act (CAA). This law defines the role of the...

256

Benchmark validation comparisons of measured and calculated delayed neutron detector responses for a pulsed photonuclear assessment technique  

SciTech Connect

An MCNPX-based calculational methodology has been developed to numerically simulate the complex electron–photon–neutron transport problem for the active interrogation system known as the pulsed photonuclear assessment (PPA) technique. The PPA technique uses a pulsed electron accelerator to generate bremsstrahlung photons in order to fission nuclear materials. Delayed neutron radiation is then detected with helium-3 neutron detectors as evidence of the nuclear material presence. Two experimental tests were designed, setup and run to generate experimental data for benchmarking purposes. The first test irradiated depleted uranium in air, and the second test, depleted uranium in a simulated cargo container (plywood pallet), using 10 MeV electron pulses. Time-integrated, post-flash, delayed neutron counts were measured and compared to calculated count predictions in order to benchmark the calculational methodology and computer models. Comparisons between the experimental measurements and numerical predictions of the delayed neutron detector responses resulted in reasonable experiment/calculated ratios of 1.42 and 1.06 for the two tests. High-enriched uranium (HEU) predictions were also made with the benchmarked models.

J. W. Sterbentz; J. L. Jones; W. Y. Yoon; D. R. Norman; K. J. Haskell

2007-08-01T23:59:59.000Z

257

Catalyst deactivation kinetics: An apparent delay in decreasing of catalyst activity, “inflection point” and data interpretation  

Science Journals Connector (OSTI)

Problems of catalyst deactivation kinetics and catalyst stability testing are considered. An apparent delay...

N. M. Ostrovskii

2011-12-01T23:59:59.000Z

258

Electrocatalysts for Nonaqueous Lithium–Air Batteries:...  

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

Electrocatalysts for Nonaqueous Lithium–Air Batteries: Status, Challenges, and Perspective. Electrocatalysts for Nonaqueous Lithium–Air Batteries: Status, Challenges,...

259

Remove Condensate with Minimal Air Loss  

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

This tip sheet outlines several condensate removal methods as part of maintaining compressed air system air quality.

260

Safeguarding indoor air quality  

SciTech Connect

California has created and implemented the first state program devoted exclusively to the investigation of nonindustrial indoor air quality. The program is responsible for promoting and conducting research on the determining factors of healthful indoor environments and is structured to obtain information about emission sources, ventilation effects, indoor concentrations, human activity patterns, exposures, health risks, control measures and public policy options. Data are gathered by a variety of methods, including research conducted by staff members, review of the available scientific literature, participation in technical meetings, contractual agreements with outside agencies, cooperative research projects with other groups and consultation with experts. 23 references, 1 figure, 1 table.

Sexton, K.; Wesolowski, J.J.

1985-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "air recirculation delay" 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

Combustion Characteristics, Emissions and Heat Release Rate Analysis of a Homogeneous Charge Compression Ignition Engine with Exhaust Gas Recirculation Fuelled with Diesel  

Science Journals Connector (OSTI)

The EGR, a very well-known method for NOx reduction in diesel engines, is also a method in HCCI combustion mode, when fuelled with commercial fuel, to improve engine power, mainly because of the increase of the ignition delay. ... Heywood, J. B. “Internal Combustion Engine Fundamentals”, Ed. McGraw-Hill Book Company, Singapur (Singapur), 1988. ... (Mechanical Engineering Laboratory MITI) “Chemical Kinetic Study of a Cetane Number Enhancing Additive for an LGP DI Diesel Engine,” ...

Miguel Torres García; Francisco J. Jiménez-Espadafor Aguilar; Tomás Sánchez Lencero

2009-04-02T23:59:59.000Z

262

Abatement of Air Pollution: Hazardous Air Pollutants (Connecticut)  

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

These regulations describe maximum allowable stack concentrations and hazard limiting values for the emission of hazardous air pollutants. The regulations also discuss sampling procedures for...

263

Gels under stress: the origins of delayed collapse  

E-Print Network (OSTI)

Attractive colloidal particles can form a disordered elastic solid or gel when quenched into a two-phase region, if the volume fraction is sufficiently large. When the interactions are comparable to thermal energies the stress-bearing network within the gel restructures over time as individual particle bonds break and reform. Typically, under gravity such weak gels show a prolonged period of either no or very slow settling, followed by a sudden and rapid collapse - a phenomenon known as delayed collapse. The link between local bond breaking events and the macroscopic process of delayed collapse is not well understood. Here we summarize the main features of delayed collapse and discuss the microscopic processes which cause it. We present a plausible model which connects the kinetics of bond breaking to gel collapse and test the model by exploring the effect of an applied external force on the stability of a gel.

Lisa J. Teece; James M. Hart; Kerry Yen Ni Hsu; Stephen Gilligan; Malcolm A. Faers; Paul Bartlett

2014-03-12T23:59:59.000Z

264

Delay time calculation for dual-wavelength quantum cascade lasers  

SciTech Connect

In this paper, we calculate the turn-on delay (t{sub th}) and buildup (?t) times of a midinfrared quantum cascade laser operating simultaneously on two laser lines having a common upper level. The approach is based on the four-level rate equations model describing the variation of the electron number in the states and the photon number present within the cavity. We obtain simple analytical formulae for the turn-on delay and buildup times that determine the delay times and numerically apply our results to both the single and bimode states of a quantum cascade laser, in addition the effects of current injection on t{sub th} and ?t are explored.

Hamadou, A., E-mail: abd-hamado@yahoo.fr [Département des Sciences et Techniques, Faculté des Sciences et de la Technologie, Université de Bordj Bou Arreridj 34000 (Algeria); Laboratoire d’étude des surfaces et interfaces des matériaux solides (LESIMS), Sétif 19000 (Algeria); Lamari, S. [Laboratoire d’étude des surfaces et interfaces des matériaux solides (LESIMS), Sétif 19000 (Algeria); Département de Physique, Faculté des Sciences, Université Sétif 1, 19000 (Algeria); Thobel, J.-L. [Institut d'Electronique, de Microélectronique et de Nanotechnologie (IEMN), UMR 8520, Université Lille1, Avenue Poincaré, BP 60069, 59652 Villeneuve d'Ascq Cédex (France)

2013-11-28T23:59:59.000Z

265

Multi-rhythmicity in an optoelectronic oscillator with large delay  

E-Print Network (OSTI)

An optoelectronic oscillator exhibiting a large delay in its feedback loop is studied both experimentally and theoretically. We show that multiple square-wave oscillations may coexist for the same values of the parameters (multi-rhythmicity). Depending on the sign of the phase shift, these regimes admit either periods close to an integer fraction of the delay or periods close to an odd integer fraction of twice the delay. These periodic solutions emerge from successive Hopf bifurcation points and stabilize at a finite amplitude following a scenario similar to Eckhaus instability in spatially extended systems. We find quantitative agreements between experiments and numerical simulations. The linear stability of the square-waves is substantiated analytically by determining stable fixed points of a map.

Weicker, Lionel; Rosin, David P; Gauthier, Daniel J

2014-01-01T23:59:59.000Z

266

Efficient Path Delay Test Generation with Boolean Satisfiability  

E-Print Network (OSTI)

Assignments (NAs) of the paths are compacted to improve the compaction ratio. However, dynamic compaction takes significantly more CPU time than static compaction. 1.5 Pseudo Functional Test The voltage level of the power grid in the circuit can... significantly affect the accuracy of delay test. [32][33] The launching of the delay test causes a surge in the current drawn from the power grid. Because of the inductance on the power grid, this current surge will cause a large drop in power supply voltage...

Bian, Kun

2013-12-10T23:59:59.000Z

267

Coherence Resonance in an Autapse Neuron Model with Time Delay  

E-Print Network (OSTI)

We study the noise activated dynamics of a model {\\it autapse} neuron system that consists of a subcritical Hopf oscillator with a time delayed nonlinear feedback. The coherence of the noise driven pulses of the neuron exhibits a novel double peaked structure as a function of the noise amplitude. The two peaks correspond to separate optimal noise levels for excitation of single spikes and multiple spikes (bursts) respectively. The relative magnitudes of these peaks are found to be a sensitive function of time delay. The physical significance of our results and its practical implications in various real life systems are discussed.

Gautam C Sethia; Juergen Kurths; Abhijit Sen

2006-04-10T23:59:59.000Z

268

Air Liquide - Biogas & Fuel Cells  

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

Liquide - Biogas & Fuel Cells Hydrogen Energy Biogas Upgrading Technology 12 June 2012 Charlie.Anderson@airliquide.com 2 Air Liquide, world leader in gases for industry,...

269

Nebraska Air Quality Regulations (Nebraska)  

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

These regulations, promulgated by the Department of Environmental Quality, contain provisions pertaining to ambient air quality standards, pollution source operating permits, emissions reporting,...

270

Global air quality and climate  

E-Print Network (OSTI)

Chemistry and Climate Model Intercomparison Project (ACCMIP;of chemistry–climate models with RCP emissions thus projectto project air quality responses to future climate change

2012-01-01T23:59:59.000Z

271

Air Force Renewable Energy Programs  

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

Presentation covers Air Force Renewable Energy Programs and is given at the Spring 2011 Federal Utility Partnership Working Group (FUPWG) meeting.

272

Reduce Air Infiltration in Furnaces  

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

This tip sheet describes how to save process heating energy and costs by reducing air infiltration in industrial furnaces; tips include repairing leaks and increasing insulation.

273

Reactive Air Aluminization  

SciTech Connect

Ferritic stainless steels and other alloys are of great interest to SOFC developers for applications such as interconnects, cell frames, and balance of plant components. While these alloys offer significant advantages (e.g., low material and manufacturing cost, high thermal conductivity, and high temperature oxidation resistance), there are challenges which can hinder their utilization in SOFC systems; these challenges include Cr volatility and reactivity with glass seals. To overcome these challenges, protective coatings and surface treatments for the alloys are under development. In particular, aluminization of alloy surfaces offers the potential for mitigating both evaporation of Cr from the alloy surface and reaction of alloy constituents with glass seals. Commercial aluminization processes are available to SOFC developers, but they tend to be costly due to their use of exotic raw materials and/or processing conditions. As an alternative, PNNL has developed Reactive Air Aluminization (RAA), which offers a low-cost, simpler alternative to conventional aluminization methods.

Choi, Jung-Pyung; Chou, Y. S.; Stevenson, Jeffry W.

2011-10-28T23:59:59.000Z

274

An air line carries air at 800 kPa and 80C. An Air line ~ O O C insulated tank initially contains 20C air at a  

E-Print Network (OSTI)

An air line carries air at 800 kPa and 80°C. An Air line ~ O O C insulated tank initially contains 20°C air at a pressure of 90kPa. The valve is opened, and air flows into the tank. Determine the final temperature of the air in the tank and the mass of air that enters the tank if the valve is left

Huang, Haimei

275

Inhalation intake of ambient air pollution in California's South Coast Air Basin  

E-Print Network (OSTI)

the impacts on air pollution and health of urban areaas a proxy for air pollution health effects (Bennett etFuel combustion, air pollution exposure, and health: The

Marshall, Julian D.; Granvold, Patrick W.; Hoats, Abigail S.; McKone, Thomas E.; Deakin, Elizabeth; Nazaroff, William W.

2006-01-01T23:59:59.000Z

276

Instability of coupled systems with delay1 Reinhard Racke  

E-Print Network (OSTI)

Instability of coupled systems with delay1 Reinhard Racke Department of Mathematics and Statistics University of Konstanz 78457 Konstanz, Germany reinhard.racke@uni-konstanz.de Abstract: We consider linear, Quintanilla & Racke [9], or Pr¨u� [29], in particular for connections to Volterra equations. Indeed

Racke, Reinhard

277

Client-Centered Energy and Delay Analysis for TCP Downloads  

E-Print Network (OSTI)

time for energy savings during TCP downloads, in an attempt to reduce the energy*delay product. Effectively saving WNIC energy during a TCP download is difficult because TCP streams tend to be smooth transfer time in exchange for energy savings. In fact, IEEE 802.11b power saving mode (PSM) [2] is designed

Lowenthal, David

278

A CURRENT CONTROLLED VARIABLE DELAY SUPERCONDUCTING TRANSMISSION LINE  

E-Print Network (OSTI)

I I I I 1388 A CURRENT CONTROLLED VARIABLE DELAY SUPERCONDUCTING TRANSMISSION LINE S. M. Anlage, H line. The device makes use of the change in kinetic inductance of a superconducting transmission line, fabrication of transmission lines with such films provides the means for constructing a continuously variable

Anlage, Steven

279

On the modeling of time-varying delays  

E-Print Network (OSTI)

functions were limited to steps, ramps and sinusoids. This limited class of inputs and delays defines the scope of this thesis and the results are to be interpreted as such. The methodology adopted to identify the basic underpinnings of models was system...

Shah, Chirag Laxmikant

2004-09-30T23:59:59.000Z

280

Delayed neutron emission measurements for U-235 and Pu-239  

E-Print Network (OSTI)

The delayed neutron emission rates of U-235 and Pu-239 samples were measured accurately from a thermal fission reaction. A Monte Carlo calculation using the Geant4 code was used to demonstrate the neutron energy independence of the detector used...

Chen, Yong

2009-05-15T23:59:59.000Z

Note: This page contains sample records for the topic "air recirculation delay" 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

Envelope/phase delays correction in an EER radio architecture  

E-Print Network (OSTI)

Envelope/phase delays correction in an EER radio architecture Jean-François BERCHER and Corinne -- In this paper we consider the sensitivity of a transmitter based on EER radio architecture to time mismatches the interest of this approach. I. INTRODUCTION Envelope Elimination and restoration (EER) was developed by Kahn

Bercher, Jean-François

282

Delay analysis of bursty tasks using workload arrival functions  

E-Print Network (OSTI)

and the integrated methodologies with variable workloads are introduced. However, these methodologies have some limitations when they are applied to task systems instead of traffic. In this thesis, we propose that the end-to-end delay computed by the decomposed...

Kim, Junwhan

2012-06-07T23:59:59.000Z

283

Joint Power-Delay Minimization in Green Wireless Access Networks  

E-Print Network (OSTI)

, adapting power consumption to traffic load [3] or devising intelligent network deployment strategies using an optimization problem that jointly minimizes the power consumption of the network and the sum of data unitJoint Power-Delay Minimization in Green Wireless Access Networks Farah Moety, Samer Lahoud, Kinda

Paris-Sud XI, Université de

284

Technology Mapping Targeting Routing Congestion under Delay Constraints  

E-Print Network (OSTI)

1 Technology Mapping Targeting Routing Congestion under Delay Constraints Rupesh S. Shelar, Member a serious concern in today's VLSI designs. To address the same, we propose a technology mapping algorithm in a 100 nm technology show that the algorithm can improve track overflows by 59%, on an average

Sapatnekar, Sachin

285

A DELAYED NONLINEAR PBPK MODEL FOR GENISTEIN DOSIMETRY IN RATS  

E-Print Network (OSTI)

A DELAYED NONLINEAR PBPK MODEL FOR GENISTEIN DOSIMETRY IN RATS #3; MICHAEL G. ZAGER y , HIEN T endocrine-related e#11;ects such as reduced birth weight in rats and humans. In its conjugated form], including soybean-derived foods with high genistein concentrations, such as tofu and soy-derived infant

286

Photonics for time delay in communication Jianyi Yang  

E-Print Network (OSTI)

to 50 ns, or 0.3 mm to 15 m in free space, for most phased array antenna PAA applications. In PAAs result- ing from the propagation from each of the PAA's indi- vidual emitters. In general, the maximum delay time re- quired in a PAA is comparable with the antenna's size. For a large PAA it is generally

Chen, Ray

287

Task Assignment in a Server Farm with Switching Delays and  

E-Print Network (OSTI)

costs Holding costs (per job) Objective to balance between Energy consumption Performance (e.g., latency Energy- and Delay-aware cost structure Switching costs Running costs Holding costs (per job) Objective to balance between Energy consumption Performance (e.g., latency) Heterogeneous servers, job-specific costs

Hyytiä, Esa

288

Packet Audio Playout Delay Adjustment: Performance Bounds and Algorithms \\Lambda  

E-Print Network (OSTI)

Packet Audio Playout Delay Adjustment: Performance Bounds and Algorithms \\Lambda Sue B. Moon, Jim 01003 fsbmoon,kurose,towsleyg@cs.umass.edu Abstract In packet audio applications, packets are buffered, given a trace of packet audio receptions at a receiver, we present efficient algorithms for computing

Massachusetts at Amherst, University of

289

Turbo King: Framework for Large-Scale Internet Delay Measurements  

E-Print Network (OSTI)

servers (which is called cache pollution) and requires large traffic overhead when deployed in large consuming half the bandwidth needed by King and reducing the impact of cache pollution by several orders building an all-to-all delay matrix between approximately 220, 000 BGP prefixes advertised in the Internet

Loguinov, Dmitri

290

Switching Surges and Air Insulation  

Science Journals Connector (OSTI)

...research-article Switching Surges and Air Insulation B. Jones Some thirteen years ago...reduction was noticed in the strength of air insulation when subjected to slowly rising positive...collected in high voltage laboratories. Insulation against switching surges is now seen...

1973-01-01T23:59:59.000Z

291

Protective supplied breathing air garment  

DOE Patents (OSTI)

A breathing air garment for isolating a wearer from hostile environments containing toxins or irritants includes a suit and a separate head protective enclosure or hood engaging a suit collar in sealing attachment. The hood and suit collar are cylindrically shaped and dimensioned to enable the wearer to withdraw his hands from the suit sleeves to perform manual tasks within the hood interior. Breathing air is supplied from an external air line with an air delivery hose attached to the hood interior. The hose feeds air into an annular halo-like fiber-filled plenum having spaced discharge orifices attached to the hood top wall. A plurality of air exhaust/check valves located at the suit extremities cooperate with the hood air delivery system to provide a cooling flow of circulating air from the hood throughout the suit interior. A suit entry seal provided on the suit rear torso panel permits access into the suit and is sealed with an adhesive sealing flap.

Childers, Edward L. (Lakewood, CO); von Hortenau, Erik F. (Golden, CO)

1984-07-10T23:59:59.000Z

292

Protective supplied breathing air garment  

DOE Patents (OSTI)

A breathing air garment is disclosed for isolating a wearer from hostile environments containing toxins or irritants includes a suit and a separate head protective enclosure or hood engaging a suit collar in sealing attachment. The hood and suit collar are cylindrically shaped and dimensioned to enable the wearer to withdraw his hands from the suit sleeves to perform manual tasks within the hood interior. Breathing air is supplied from an external air line with an air delivery hose attached to the hood interior. The hose feeds air into an annular halo-like fiber-filled plenum having spaced discharge orifices attached to the hood top wall. A plurality of air exhaust/check valves located at the suit extremities cooperate with the hood air delivery system to provide a cooling flow of circulating air from the hood throughout the suit interior. A suit entry seal provided on the suit rear torso panel permits access into the suit and is sealed with an adhesive sealing flap. 17 figs.

Childers, E.L.; Hortenau, E.F. von.

1984-07-10T23:59:59.000Z

293

Measurement of Gravitational Lens Time Delays with LSST (SULI Paper)  

SciTech Connect

The proposed Large Synoptic Survey Telescope will be the first to explore multiple dark energy probes simultaneously, including baryon acoustic oscillations, weak lensing, and strong gravitational lensing. The large data sample, covering the entire visible sky every few nights, will allow an unprecedented survey of deep supernova sources and their lensed images. The latter have not yet been observed. Notably, LSST will measure the time delays between different strong-lensed images of the same supernova. This will provide a unique probe of dark matter, dark energy, and the expansion rate of the Universe. By simulating LSST observations under realistic conditions, we determined the time delay precision of multiple images from a representative strong-lensed Type Ia supernova. The output of the simulation was a set of light curves according to field and filter, which were subsequently analyzed to determine the experimental time delays. We find that a time delay precision of better then 10% can be achieved under suitable conditions. Firstly, a minimum observed peak-magnitude of 22 is required for the lensed image, corresponding to an intrinsic source magnitude of about 24. The number of such supernova sources expected for LSST is under investigation, but it could amount to several thousand. Secondly, a minimum of about 50 visits per field is required, and, moreover, these visits must be evenly distributed over the duration of the event. The visit frequency should be approximately once per week, or better. Thirdly, the sky brightness should be below 21 magnitude arcsec{sup -2} to allow sufficient sensitivity to distance sources. Under the nominal LSST visiting schedule and field conditions, 15% of all fields satisfy these criteria, and allow time delay measurements of better than 10% precision. This performance can be further improved by fitting the predicted supernova light curves to the observations, rather than using the simple weighted mean as in the present study. Of the well-measured fields, 85% involve observations taken with the r filter, which has a wavelength acceptance that is well-matched to supernova spectra. This filter therefore represents the best choice for strong gravitational lens observations with LSST. Our primary conclusion is that the visiting schedule is the single most important parameter to optimize for time delay measurements, and, once a lensed supernova has been detected, that frequent, regular observations should be scheduled to search with the highest sensitivity for multiple, delayed lensed images.

Kirkby, Lowry Anna; /Oxford U. /SLAC

2006-01-04T23:59:59.000Z

294

High Efficiency Particulate Air Filters  

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

High Efficiency Particulate Air (HEPA) Filters High Efficiency Particulate Air (HEPA) Filters Home Standards DOE Workshops Nuclear Air Cleaning Conference Proceedings Qualified Filter List News Items Related Sites HEPA Related Lessons Learned Contact Us HSS Logo High Efficiency Particulate Air Filters The HEPA Filter web site provides a forum for informing and reporting department-wide activities related to filtration and ventilation issues with special reference to the High Efficiency Particulate Air (HEPA) Filters' use, inspection, and testing. This site contains essentials of DOE HEPA filter test program, procedures, requirements and quality assurance aspects applicable to HEPA filters used in DOE facilities. This site contains information about the DOE-accepted Filter Test Facility and its management, operation and quality assuranceprogram.

295

NETL: IEP - Air Quality Research  

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

Home > Technologies > Coal & Power Systems > Innovations for Existing Plants > Air Quality Research Home > Technologies > Coal & Power Systems > Innovations for Existing Plants > Air Quality Research Innovations for Existing Plants Air Quality Research Ambient Monitoring Emissions Characterization Predictive Modeling & Evaluation Health Effects Regulatory Drivers Air Quality Research Reference Shelf The NETL Air Quality Research program is designed to resolve the scientific uncertainties associated with the atmospheric formation, distribution, and chemical transformation of pollutant emissions from today's coal-fired power plants, and to obtain a realistic assessment of the human health impacts of these emissions. Results of this research will help the DOE Office of Fossil Energy address policy questions regarding coal plant emissions and provide guidance for future emissions control R&D programs at

296

air conditioner | OpenEI  

Open Energy Info (EERE)

air conditioner air conditioner Dataset Summary Description View 2010 energy efficiency data from AeroSys Inc, Coaire, Cold Point, First Operations, LG Electronics, Nordyne, and Quietside manufacturers. Data includes cooling capacity, cooling performance, heating capacity, and heating performance. Spreadsheet was created by combining the tables in pdf files that are included in the zip file. Source Energy Applicance Data - United States Federal Trade Commission, www.ftc.gov Date Released Unknown Date Updated Unknown Keywords air conditioner central air conditioner efficiency efficient energy heat pump Data application/vnd.ms-excel icon 2010_CentralAC_All.xls (xls, 82.4 KiB) application/zip icon 2010CentralAirConditioner.zip (zip, 398.2 KiB) Quality Metrics Level of Review Some Review

297

Air Force Renewable Energy Programs  

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

1 1 Ken Gray P.E. HQ AFCESA /CENR Air Force Renewable Energy Programs April, 2011 FUPWG "Make Energy a Consideration in All We Do" I n t e g r i t y - S e r v i c e - E x c e l l e n c e THINK GREEN, BUILD GREEN, Topics  Air Force Energy Use  Air Force Facility Energy Center  Current RE Generation  Project Development System  Programmed RE Generation FY11-13  Goal Achievement 2 I n t e g r i t y - S e r v i c e - E x c e l l e n c e THINK GREEN, BUILD GREEN, Air Force 2010 Energy Use The Air Force spent approximately $8.2 billion for energy in 2010; an increase of 22% from 2009 Energy Cost and Consumption Trends Energy Cost Breakdown Aviation 79% Facilities 17% 3 Aviation 84% Facilities 12% Vehicles & Equipment

298

Air Leakage and Air Transfer Between Garage and Living Space  

SciTech Connect

This research project focused on evaluation of air transfer between the garage and living space in a single-family detached home constructed by a production homebuilder in compliance with the 2009 International Residential Code and the 2009 International Energy Conservation Code. The project gathered important information about the performance of whole-building ventilation systems and garage ventilation systems as they relate to minimizing flow of contaminated air from garage to living space. A series of 25 multi-point fan pressurization tests and additional zone pressure diagnostic testing characterized the garage and house air leakage, the garage-to-house air leakage, and garage and house pressure relationships to each other and to outdoors using automated fan pressurization and pressure monitoring techniques. While the relative characteristics of this house may not represent the entire population of new construction configurations and air tightness levels (house and garage) throughout the country, the technical approach was conservative and should reasonably extend the usefulness of the results to a large spectrum of house configurations from this set of parametric tests in this one house. Based on the results of this testing, the two-step garage-to-house air leakage test protocol described above is recommended where whole-house exhaust ventilation is employed. For houses employing whole-house supply ventilation (positive pressure) or balanced ventilation (same pressure effect as the Baseline condition), adherence to the EPA Indoor airPLUS house-to-garage air sealing requirements should be sufficient to expect little to no garage-to-house air transfer.

Rudd, A.

2014-09-01T23:59:59.000Z

299

Analysis of a Dedicated Outdoor Air System and Low Temperature Supply Air Conditioning System  

E-Print Network (OSTI)

This paper presents the principles and the characteristics of a dedicated outdoor air system (DOAS) and low temperature supply air system. DOAS is offered based on the demands of indoor air quality and the low temperature supply air system...

Guang, L.; Li, R.

2006-01-01T23:59:59.000Z

300

Supply Fan Control for Constant Air Volume Air Handling Units  

E-Print Network (OSTI)

Since terminal boxes do not have a modulation damper in constant volume (CV) air handling unit (AHU) systems, zone reheat coils have to be modulated to maintain the space temperature with constant supply airflow. This conventional control sequence...

Cho, Y.; Wang, G.; Liu, M.

2007-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "air recirculation delay" 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

2011 Air Quality Regulations Report | Department of Energy  

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

Air Quality Regulations Report 2011 Air Quality Regulations Report 2011 Air Quality Regulations Report120111.pdf More Documents & Publications 2011:...

302

Central Air Conditioning | Department of Energy  

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

Central Air Conditioning Central Air Conditioning Central Air Conditioning May 30, 2012 - 8:01pm Addthis Central air conditioners circulate cool air through a system of supply and return ducts. | Photo courtesy of ©iStockphoto/DonNichols. Central air conditioners circulate cool air through a system of supply and return ducts. | Photo courtesy of ©iStockphoto/DonNichols. What does this mean for me? Central air conditioning systems are thermostatically controlled and convenient to use. Central air conditioning systems must be installed properly to operate efficiently. Central air conditioning systems can share ductwork with your heating system. Central air conditioners circulate cool air through a system of supply and return ducts. Supply ducts and registers (i.e., openings in the walls,

303

Tips: Sealing Air Leaks | Department of Energy  

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

Sealing Air Leaks Sealing Air Leaks Tips: Sealing Air Leaks May 16, 2013 - 5:03pm Addthis Sources of Air Leaks in Your Home. Areas that leak air into and out of your home cost you a lot of money. The areas listed in the illustration are the most common sources of air leaks. Sources of Air Leaks in Your Home. Areas that leak air into and out of your home cost you a lot of money. The areas listed in the illustration are the most common sources of air leaks. Air leaks can waste a lot of your energy dollars. One of the quickest energy-- and money-saving tasks you can do is caulk, seal, and weather strip all seams, cracks, and openings to the outside. Tips for Sealing Air Leaks Test your home for air tightness. On a windy day, carefully hold a lit incense stick or a smoke pen next to your windows, doors, electrical

304

Tips: Sealing Air Leaks | Department of Energy  

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

Tips: Sealing Air Leaks Tips: Sealing Air Leaks Tips: Sealing Air Leaks May 16, 2013 - 5:03pm Addthis Sources of Air Leaks in Your Home. Areas that leak air into and out of your home cost you a lot of money. The areas listed in the illustration are the most common sources of air leaks. Sources of Air Leaks in Your Home. Areas that leak air into and out of your home cost you a lot of money. The areas listed in the illustration are the most common sources of air leaks. Air leaks can waste a lot of your energy dollars. One of the quickest energy-- and money-saving tasks you can do is caulk, seal, and weather strip all seams, cracks, and openings to the outside. Tips for Sealing Air Leaks Test your home for air tightness. On a windy day, carefully hold a lit incense stick or a smoke pen next to your windows, doors, electrical

305

Room Air Conditioners | Department of Energy  

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

Room Air Conditioners Room Air Conditioners Room Air Conditioners July 1, 2012 - 5:35pm Addthis A window air conditioner is one solution to cooling part of a house. | Photo courtesy of ©iStockphoto/kschulze. A window air conditioner is one solution to cooling part of a house. | Photo courtesy of ©iStockphoto/kschulze. What does this mean for me? Room air conditioners are less expensive and disruptive to install than central air conditioning systems. Room air conditioners can be a cost-effective alternative to central air conditioning systems. How does it work? Room air conditioners work by cooling one part of your home. Room or window air conditioners cool rooms rather than the entire home or business. If they provide cooling only where they're needed, room air conditioners are less expensive to operate than central units, even though

306

Air Pollution and Epigenetics: Recent Findings  

Science Journals Connector (OSTI)

The health effects of ambient air pollution are well-described, but less is known ... , microRNA, and DNA methylation; along with air pollutant keywords: air pollution, benzo[a]pyrene, nitrogen dioxide, ozone...1

Carrie V. Breton; Amy N. Marutani

2014-03-01T23:59:59.000Z

307

DunoAir | Open Energy Information  

Open Energy Info (EERE)

DunoAir Jump to: navigation, search Name: DunoAir Place: Hessen, Germany Zip: 6865 VX Sector: Wind energy Product: Doorwerth-based wind project developer. References: DunoAir1...

308

Inertial impaction air sampling device  

DOE Patents (OSTI)

An inertial impactor to be used in an air sampling device for collection of respirable size particles in ambient air which may include a graphite furnace as the impaction substrate in a small-size, portable, direct analysis structure that gives immediate results and is totally self-contained allowing for remote and/or personal sampling. The graphite furnace collects suspended particles transported through the housing by means of the air flow system, and these particles may be analyzed for elements, quantitatively and qualitatively, by atomic absorption spectrophotometry. 3 figs.

Dewhurst, K.H.

1987-12-10T23:59:59.000Z

309

ENVITEC shows off air technologies  

SciTech Connect

The ENVITEC International Trade Fair for Environmental Protection and Waste Management Technologies, held in June in Duesseldorf, Germany, is the largest air pollution exhibition in the world and may be the largest environmental technology show overall. Visitors saw thousands of environmental solutions from 1,318 companies representing 29 countries and occupying roughly 43,000 square meters of exhibit space. Many innovations were displayed under the category, ``thermal treatment of air pollutants.`` New technologies include the following: regenerative thermal oxidizers; wet systems for removing pollutants; biological scrubbers;electrostatic precipitators; selective adsorption systems; activated-coke adsorbers; optimization of scrubber systems; and air pollution monitors.

McIlvaine, R.W.

1995-08-01T23:59:59.000Z

310

Inertial impaction air sampling device  

DOE Patents (OSTI)

An inertial impactor to be used in an air sampling device for collection of respirable size particles in ambient air which may include a graphite furnace as the impaction substrate in a small-size, portable, direct analysis structure that gives immediate results and is totally self-contained allowing for remote and/or personal sampling. The graphite furnace collects suspended particles transported through the housing by means of the air flow system, and these particles may be analyzed for elements, quantitatively and qualitatively, by atomic absorption spectrophotometry.

Dewhurst, Katharine H. (13150 Wenonah SE. Apt. 727, Albuquerque, NM 87123)

1990-01-01T23:59:59.000Z

311

Inertial impaction air sampling device  

DOE Patents (OSTI)

An inertial impactor is designed which is to be used in an air sampling device for collection of respirable size particles in ambient air. The device may include a graphite furnace as the impaction substrate in a small-size, portable, direct analysis structure that gives immediate results and is totally self-contained allowing for remote and/or personal sampling. The graphite furnace collects suspended particles transported through the housing by means of the air flow system, and these particles may be analyzed for elements, quantitatively and qualitatively, by atomic absorption spectrophotometry. 3 figs.

Dewhurst, K.H.

1990-05-22T23:59:59.000Z

312

Air pollution kills. So what? Air quality engineering to improve public health  

E-Print Network (OSTI)

9/14/12 1 Air pollution kills. So what? Air quality engineering to improve public health;9/14/12 5 Health benefits from reducing PM2.5 "Each 10 µg m-3 elevation in fine particle air pollution;9/14/12 2 Air Quality Engineering H Air Quality Engineering H #12;9/14/12 3 Really? Air pollution

Levinson, David M.

313

WearAir: Expressive T-shirts for Air Quality Sensing Sunyoung Kim and Eric Paulos  

E-Print Network (OSTI)

are less proactively concerned with air quality. AIR POLLUTANT: VOLATILE ORGANIC COMPOUNDS Different types of air pollutants contribute to air quality in different locations: Ozone, CO, NOx and VOCs are major contributors to outdoor air pollution; and particulate matters, VOCs, carbon monoxide and lead are common air

Mankoff, Jennifer

314

E-Print Network 3.0 - analysis delays restart Sample Search Results  

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

of restart delay at 5 mins and the baselineg p g p y y y different groups Large systems on an internet... 300 400 500 600 700 ofJobs j Job Restart Delay specifies a...

315

Video-on-Demand Based on Delayed-Multicast: Algorithmic Support  

Science Journals Connector (OSTI)

...Article Video-on-Demand Based on Delayed-Multicast: Algorithmic Support N. Glinos...examine algorithmic issues related to the delayed multicast technique for video-on-demand delivery. We introduce the minimum total memory (MTM......

N. Glinos; D. B. Hoang; C. Nguyen; A. Symvonis

2004-01-01T23:59:59.000Z

316

A study of microstrip delay lines on high dielectric constant substrates  

E-Print Network (OSTI)

Microstrip delay lines have many possible applications in today's world of high frequency communications and radar systems. High dielectric constant (high-x) substrates allow for the building of miniaturized microstrip delay fines which...

Ashour, Thomas Joseph

2012-06-07T23:59:59.000Z

317

Degradation characteristics of air cathode in zinc air fuel cells  

Science Journals Connector (OSTI)

Abstract The zinc air fuel cell (ZAFC) is a promising candidate for electrical energy storage and electric vehicle propulsion. However, its limited durability has become a major obstacle for its successful commercialization. In this study, 2-cell stacks, 25 cm² cells and three-electrode half-cells are constructed to experimentally investigate the degradation characteristics of the air cathode. The results of electrochemical tests reveal that the peak power density for the 25 cm2 cell with a new air cathode is 454 mW cm?2, which is twice as the value of the used air cathode. The electrochemical impedance analysis shows that both the charge transfer resistance and the mass transfer resistance of the used air cathodes have increased, suggesting that the catalyst surface area and gas diffusion coefficient have decreased significantly. Additionally, the microstructure and morphology of the catalytic layer (CL) and gas diffusion layer (GDL) are characterized by scanning electron microscopes (SEM). SEM results confirm that the micropores in CL and GDL of the used air cathode are seriously clogged, and many catalyst particles are lost. Therefore, the performance degradation is mainly due to the clogging of micropores and loss of catalyst particles. Furthermore, hypotheses of degradation mechanism and mitigation strategies for GDL and CL are discussed briefly.

Ze Ma; Pucheng Pei; Keliang Wang; Xizhong Wang; Huachi Xu; Yongfeng Liu; Guanlin peng

2015-01-01T23:59:59.000Z

318

Air- and Oxy-Fired Fireside Corrosion  

SciTech Connect

The primary goal of this work was to examine the corrosion effects from flue gas composition changes arising from oxy?combustion. At 700°C, increased SO{sub X}, CO{sub 2}, and H{sub 2}O contents in the gas phase arising from various oxy?combustion flue gas recirculation scenarios, while maintaining constant ash deposit chemistry, do not increase corrosion in superheater or reheater tubing. At 400°C, for both oxidative and reducing conditions, the corrosion rates were lower than at 700°C.

Holcomb, G. R.; Tylczak, J.; Carney, C.; Laughlin, D.; Zhu, J.; Wise, A.

2014-03-04T23:59:59.000Z

319

Integrated Technology Air Cleaners (ITAC): Design and Evaluation  

E-Print Network (OSTI)

of particle air filtration technologies." Indoor Air 12(4):2011a). New air cleaning technologies for reduced commercialnumber 2 Integrated technology air cleaner High efficiency

Fisk, William J.

2014-01-01T23:59:59.000Z

320

Are Ventilation Filters Degrading Indoor Air Quality in California Classrooms?  

E-Print Network (OSTI)

air conditioning  IAQ: Indoor air quality  LBNL: Lawrence Degrading Indoor Air Quality in California Classrooms? HDEGRADING INDOOR AIR QUALITY IN CALIFORNIA CLASSROOMS?

Fisk, Michael G. Apte and William J.

2009-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "air recirculation delay" 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

Syngas production from burner-stabilized methane/air flames: The effect of preheated reactants  

Science Journals Connector (OSTI)

The effect of preheated reactants on syngas production from a methane/air flame was investigated over a range of inlet temperatures up to 630 K. In addition to experimental measurements, the results from a burner-stabilized flame and freely-propagating flame models are presented. A comparison of the modeling and experimental results in terms of flame standoff distance, stability limit conditions and species yields show excellent agreement across a broad range of equivalence ratios and preheat temperatures. Preheating of reactants increased the rich limit for stable operation from 1.26 to 1.75 for a given inlet velocity, and syngas yields were shown to increase with equivalence ratio. The preheat temperature of the reactants was shown to have little impact on syngas yields beyond extending the limits of stable operation. The results of this study are useful for the design and analysis of heat recirculating reactors and other reactors that are designed for producing syngas through the combustion of rich mixtures.

Colin H. Smith; Daniel I. Pineda; Janet L. Ellzey

2013-01-01T23:59:59.000Z

322

The neutron 'thunder' accompanying the extensive air shower  

E-Print Network (OSTI)

Simulations show that neutrons are the most abundant component among extensive air shower hadrons. However, multiple neutrons which appear with long delays in neutron monitors nearby the EAS core ('neutron thunder') are mostly not the neutrons of the shower, but have a secondary origin. The bulk of them is produced by high energy EAS hadrons hitting the monitors. The delays are due to the termalization and diffusion of neutrons in the moderator and reflector of the monitor accompanied by the production of secondary gamma-quanta. This conclusion raises the important problem of the interaction of EAS with the ground, the stuff of the detectors and their environment since they have often hydrogen containing materials like polyethilene in neutron monitors. Such interaction can give an additional contribution to the signal in the EAS detectors. It can be particularly important for the signals from scintillator or water tank detectors at km-long distances from the EAS core where neutrons of the shower become the dominant component after a few mcsec behind the EAS front.

A. D. Erlykin

2007-01-22T23:59:59.000Z

323

Use of Treated Municipal Wastewater as Power Plant Cooling System Makeup Water: Tertiary Treatment versus Expanded Chemical Regimen for Recirculating Water Quality Management  

SciTech Connect

Treated municipal wastewater is a common, widely available alternative source of cooling water for thermoelectric power plants across the U.S. However, the biodegradable organic matter, ammonia-nitrogen, carbonate and phosphates in the treated wastewater pose challenges with respect to enhanced biofouling, corrosion, and scaling, respectively. The overall objective of this study was to evaluate the benefits and life cycle costs of implementing tertiary treatment of secondary treated municipal wastewater prior to use in recirculating cooling systems. The study comprised bench- and pilot-scale experimental studies with three different tertiary treated municipal wastewaters, and life cycle costing and environmental analyses of various tertiary treatment schemes. Sustainability factors and metrics for reuse of treated wastewater in power plant cooling systems were also evaluated. The three tertiary treated wastewaters studied were: secondary treated municipal wastewater subjected to acid addition for pH control (MWW_pH); secondary treated municipal wastewater subjected to nitrification and sand filtration (MWW_NF); and secondary treated municipal wastewater subjected nitrification, sand filtration, and GAC adsorption (MWW_NFG). Tertiary treatment was determined to be essential to achieve appropriate corrosion, scaling, and biofouling control for use of secondary treated municipal wastewater in power plant cooling systems. The ability to control scaling, in particular, was found to be significantly enhanced with tertiary treated wastewater compared to secondary treated wastewater. MWW_pH treated water (adjustment to pH 7.8) was effective in reducing scale formation, but increased corrosion and the amount of biocide required to achieve appropriate biofouling control. Corrosion could be adequately controlled with tolytriazole addition (4-5 ppm TTA), however, which was the case for all of the tertiary treated waters. For MWW_NF treated water, the removal of ammonia by nitrification helped to reduce the corrosivity and biocide demand. Also, the lower pH and alkalinity resulting from nitrification reduced the scaling to an acceptable level, without the addition of anti-scalant chemicals. Additional GAC adsorption treatment, MWW_NFG, yielded no net benefit. Removal of organic matter resulted in pitting corrosion in copper and cupronickel alloys. Negligible improvement was observed in scaling control and biofouling control. For all of the tertiary treatments, biofouling control was achievable, and most effectively with pre-formed monochloramine (2-3 ppm) in comparison with NaOCl and ClO2. Life cycle cost (LCC) analyses were performed for the tertiary treatment systems studied experimentally and for several other treatment options. A public domain conceptual costing tool (LC3 model) was developed for this purpose. MWW_SF (lime softening and sand filtration) and MWW_NF were the most cost-effective treatment options among the tertiary treatment alternatives considered because of the higher effluent quality with moderate infrastructure costs and the relatively low doses of conditioning chemicals required. Life cycle inventory (LCI) analysis along with integration of external costs of emissions with direct costs was performed to evaluate relative emissions to the environment and external costs associated with construction and operation of tertiary treatment alternatives. Integrated LCI and LCC analysis indicated that three-tiered treatment alternatives such as MWW_NSF and MWW_NFG, with regular chemical addition for treatment and conditioning and/or regeneration, tend to increase the impact costs and in turn the overall costs of tertiary treatment. River water supply and MWW_F alternatives with a single step of tertiary treatment were associated with lower impact costs, but the contribution of impact costs to overall annual costs was higher than all other treatment alternatives. MWW_NF and MWW_SF alternatives exhibited moderate external impact costs with moderate infrastructure and chemical conditioner dosing, which makes them (especially

David Dzombak; Radisav Vidic; Amy Landis

2012-06-30T23:59:59.000Z

324

Radionuclide Air Emissions Report for 2012  

E-Print Network (OSTI)

Air Emissions Annual Reports for DOE Sites,” memo tooffices providing guidance for report preparation (March 22,470E-2012 Radionuclide Air Emission Report for Prepared by

Wahl, Linnea

2014-01-01T23:59:59.000Z

325

Covered Product Category: Room Air Conditioners | Department...  

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

Specifications website. Buying Energy-Efficient Room Air Conditioners When buying room air conditioners directly from commercial sources, choose models that are ENERGY...

326

Aire Valley Environmental | Open Energy Information  

Open Energy Info (EERE)

search Name: Aire Valley Environmental Place: United Kingdom Product: Leeds-based waste-to-energy project developer. References: Aire Valley Environmental1 This article...

327

Air Quality Modeling's Brave New World  

Science Journals Connector (OSTI)

Air Quality Modeling's Brave New World ... A new generation of software systems is set to tackle regional and multipollutant air quality issues. ...

Elaine L. Appleton

2011-06-07T23:59:59.000Z

328

Colorado Air Pollution Control Division - Construction Permits...  

Open Energy Info (EERE)

Jump to: navigation, search OpenEI Reference LibraryAdd to library Web Site: Colorado Air Pollution Control Division - Construction Permits Forms and Air Pollutant Emission...

329

Energy performance of underfloor air distribution systems  

E-Print Network (OSTI)

loss of control of the supply air temperature from the loss of control of the  supply air temperature from the 

Bauman, Fred; Webster, Tom; Linden, Paul; Buhl, Fred

2007-01-01T23:59:59.000Z

330

Robust chaos in autonomous time-delay system  

E-Print Network (OSTI)

We consider an autonomous system constructed as modification of the logistic differential equation with delay that generates successive trains of oscillations with phases evolving according to chaotic maps. The system contains two feedback loops characterized by two generally distinct retarding time parameters. In the case of their equality, chaotic dynamics is associated with the Smale-Williams attractor that corresponds to the double-expanding circle map for the phases of the carrier of the oscillatory trains. Alternatively, at appropriately chosen two different delays attractor is close to torus with Anosov dynamics on it as the phases are governed by the Fibonacci map. In both cases the attractors manifest robustness (absence of regularity windows under variation of parameters) and presumably relate to the class of structurally stable hyperbolic attractors.

D. S. Arzhanukhina; S. P. Kuznetsov

2014-04-16T23:59:59.000Z

331

Mountain Air | Open Energy Information  

Open Energy Info (EERE)

Air Air Jump to: navigation, search Name Mountain Air Facility Mountain Air Sector Wind energy Facility Type Commercial Scale Wind Facility Status In Service Owner Terna Energy Developer Terna Energy Energy Purchaser Idaho Power Location Hammett ID Coordinates 42.98719519°, -115.3985024° 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":42.98719519,"lon":-115.3985024,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

332

Missouri Air Conservation Law (Missouri)  

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

This law's purpose is to maintain the purity of the air resources of the state to protect the health, general welfare and physical property of the people, maximum employment and the full industrial...

333

Kansas Air Quality Regulations (Kansas)  

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

All new air contaminant emission sources or alterations to emission sources that are required to be reported shall be in compliance with all applicable emission control regulations at the time that...

334

Natural Air-Conditioning Systems  

Science Journals Connector (OSTI)

Recent research in summer air conditioning utilizing natural sources of coolness* are discussed. These systems are classified according to the sources of coolness, the modes of heat transfer and airflow, and t...

Mehdi N. Bahadori

1986-01-01T23:59:59.000Z

335

ARM - Lesson Plans: Air Pressure  

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

activity to work. It is important that students work carefully and slowly. A break in the seal between the cup and card allows air into the cup, causing the water to fall. Note: If...

337

Immediate versus Delayed IUD Insertion after Uterine Aspiration  

Science Journals Connector (OSTI)

...continued use of the IUD, removal (and reason for removal), reinsertion after expulsion or removal, and adverse events, including perforation, pelvic infection, and subsequent unintended pregnancy. All analyses were performed in the intention-to-treat population. Additional analyses were restricted to... This trial showed that, as compared with delayed placement, immediate placement of an IUD after uterine aspiration resulted in slightly higher but statistically noninferior rates of expulsion, similar rates of other complications, and higher rates of IUD use at 6 months.

Bednarek P.H.; Creinin M.D.; Reeves M.F.

2011-06-09T23:59:59.000Z

338

Delayed neutrons from the neutron irradiation of ²³?U  

E-Print Network (OSTI)

&M University Nuclear Science Center Reactor (NSCR) to verify 235U delayed neutron emission rates. A custom device was created to accurately measure a sample’s pneumatic flight time and the Nuclear Science Center’s (NSC’s) pneumatic transfer system (PTS... parameter measurements, including two 235U samples, an array of three 3He cylindrical neutron detectors, signal processing circuitry, the PTS, a reactor core sensor and a computerized control system. A. Fissile Material Isotope Products Laboratories...

Heinrich, Aaron David

2008-10-10T23:59:59.000Z

339

Complex network synchronization of chaotic systems with delay coupling  

SciTech Connect

The study of complex networks enables us to understand the collective behavior of the interconnected elements and provides vast real time applications from biology to laser dynamics. In this paper, synchronization of complex network of chaotic systems has been studied. Every identical node in the complex network is assumed to be in Lur’e system form. In particular, delayed coupling has been assumed along with identical sector bounded nonlinear systems which are interconnected over network topology.

Theesar, S. Jeeva Sathya, E-mail: sjstheesar@gmail.com; Ratnavelu, K., E-mail: sjstheesar@gmail.com [Network Science Research Group, Institute of Mathematical Sciences, University of Malaya, 50603, Kuala Lumpur (Malaysia)

2014-03-05T23:59:59.000Z

340

Computing turn delay in city road network with GPS collected trajectories  

Science Journals Connector (OSTI)

In this paper, we aim to mine turn delay at different times and turn types in city road network based on personal GPS collected trajectories. We provide a method to effectively solve the problem for computing turn delay. By using this method, we can ... Keywords: community, data mining, gps trajectory, turn delay

Hengcai Zhang; Feng Lu; Liang Zhou; Yingying Duan

2011-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "air recirculation delay" 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

Optimization of the Readout Electronics for Microchannel Plate Delay Line Anodes  

E-Print Network (OSTI)

Optimization of the Readout Electronics for Microchannel Plate Delay Line Anodes John Vallerga and future space missions use microchannel plate (MCP) detectors with delay line anode readouts (e.g. FUSE Telescope). Delay line anodes are used to measure the position of the centroid of the charge clouds

Colorado at Boulder, University of

342

The time-delayed inverted pendulum: Implications for human balance control  

E-Print Network (OSTI)

The time-delayed inverted pendulum: Implications for human balance control John Milton,1 Juan Luis May 2009; published online 29 June 2009 The inverted pendulum is frequently used as a starting point experimental paradigms of time-delayed balance control: 1 mechanical inverted time-delayed pendulum, 2 stick

Milton, John G.

343

Buffer Sizing for Minimum Energy-Delay Product by Using an Approximating Polynomial  

E-Print Network (OSTI)

Buffer Sizing for Minimum Energy-Delay Product by Using an Approximating Polynomial Chang Woo Kang to derive sizing rules for buffered chains, which optimize the overall energy-delay product. Categories result in a poor solution in terms of the energy-delay product. The focus of this work is on multi

Pedram, Massoud

344

Control of Delayed Recycling Systems with an Unstable Pole at Forward Path  

E-Print Network (OSTI)

Control of Delayed Recycling Systems with an Unstable Pole at Forward Path J. F. Marquez Rubio, B. del Muro Cu´ellar and Olivier Sename Abstract-- Unstable time delay system and recycling system pose a challenge problem in their own. When unstable time delay system have recycle the control problem becomes

Paris-Sud XI, Université de

345

Control of Delayed Recycling Systems with Unstable First Order Forward Loop  

E-Print Network (OSTI)

Control of Delayed Recycling Systems with Unstable First Order Forward Loop J. F. M Abstract Unstable time-delay systems and recycling systems are challenging problems for control analysis and design. When an unstable time-delay system has a recycle, its control problem becomes even more difficult

Boyer, Edmond

346

E-companion to: Rahmandad: Effect of Delays on Complexity of Organizational Learning Electronic Companion for  

E-Print Network (OSTI)

E-companion to: Rahmandad: Effect of Delays on Complexity of Organizational Learning 1 Electronic Companion for: Effect of Delays on Complexity of Organizational Learning Hazhir Rahmandad, hazhir@vt.edu 1: Effect of Delays on Complexity of Organizational Learning 2 An example would elaborate the workings

Rahmandad, Hazhir

347

A Low Power Thyristor-Based CMOS Programmable Delay Element Junmou Zhang  

E-Print Network (OSTI)

voltage to control the delay, exhibiting a low power supply noise sensitivity of 9.43% and a temperature. Simulation results show that the proposed delay element has a lower power supply and temperature sensitivity (¢ £ ¥ § © £ £ ) and is sensitive to power supply noise. Furthermore, the delay of an inverter chain is sensitive to temperature

Friedman, Eby G.

348

Femtosecond Time-Delay X-ray Holography  

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

Time-Delay X-ray Holography Time-Delay X-ray Holography X-ray free-electron lasers (XFELs) will produce photon pulses with a unique and desirable combination of properties. Their short X-ray wavelengths allow penetration into materials and the ability to probe structure at and below the nanometer scale. Their ultra-short duration gives information about this structure at the fundamental time-scales of atoms and molecules. The extreme intensity of the pulses will allow this information to be acquired in a single shot, so that these studies can be carried out on non-repeatable processes or on weakly-scattering objects that will be modified by the pulse. A fourth property of XFEL pulses is their high transverse coherence, which brings the promise of decades of innovation in visible optics to the X-ray regime, such as holography, interferometry, and laser-based imaging. Making an effective use of XFEL pulses, however, will benefit from innovations that are new to both X-ray science and coherent optics. One such innovation is the new method of time-delay X-ray holography [i], recently demonstrated at the FLASH FEL at DESY in Hamburg, to measure the evolution of objects irradiated by intense pulses.

349

Predicting Ignition Delay for Gas Turbine Fuel Flexibility  

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

Ignition Delay for Ignition Delay for Gas Turbine Fuel Flexibility 15 μm * Low emission combustion systems have been carefully optimized for natural gas * Future fuel diversity (including H2 containing fuels) may generate auto-ignition damage * Existing theories vary in predicting propensity for auto-ignition damage * Theory A vs Theory B shows factor of 100 difference-which is right? * UC Irvine improved and validated design tools for ignition delay allow designers to evaluate the risk for auto-ignition in advanced combustion systems with future fuels * Models are available to engine OEM's to shorten design cycle time and save $$ UC Irvine Scott Samuelsen / Vince McDonell #112 1000/T (1/K) 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 τ [O 2 ] 0.5 [F] 0.25 (sec(mol/cm 3 ) 0.75 ) 10 -10 10 -9 10 -8 10 -7 10 -6 10 -5

350

A Comparison of Cosmological Models Using Time Delay Lenses  

E-Print Network (OSTI)

The use of time-delay gravitational lenses to examine the cosmological expansion introduces a new standard ruler with which to test theoretical models. The sample suitable for this kind of work now includes 12 lens systems, which have thus far been used solely for optimizing the parameters of $\\Lambda$CDM. In this paper, we broaden the base of support for this new, important cosmic probe by using these observations to carry out a one-on-one comparison between {\\it competing} models. The currently available sample indicates a likelihood of $\\sim 70-80%$ that the $R_{\\rm h}=ct$ Universe is the correct cosmology versus $\\sim 20-30%$ for the standard model. This possibly interesting result reinforces the need to greatly expand the sample of time-delay lenses, e.g., with the successful implementation of the Dark Energy Survey, the VST ATLAS survey, and the Large Synoptic Survey Telescope. In anticipation of a greatly expanded catalog of time-delay lenses identified with these surveys, we have produced synthetic sa...

Wei, Jun-Jie; Melia, Fulvio

2014-01-01T23:59:59.000Z

351

Common Air Conditioner Problems | Department of Energy  

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

Common Air Conditioner Problems Common Air Conditioner Problems Common Air Conditioner Problems May 30, 2012 - 6:41pm Addthis A refrigerant leak is one common air conditioning problem. | Photo courtesy of ©iStockphoto/BanksPhotos. A refrigerant leak is one common air conditioning problem. | Photo courtesy of ©iStockphoto/BanksPhotos. What does this mean for me? You can eliminate the most common air conditioner problems before hiring an air conditioning technician. You can do some air conditioner maintenance and repair tasks yourself. One of the most common air conditioning problems is improper operation. If your air conditioner is on, be sure to close your home's windows and outside doors. For room air conditioners, isolate the room or a group of connected rooms as much as possible from the rest of your home.

352

Common Air Conditioner Problems | Department of Energy  

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

Common Air Conditioner Problems Common Air Conditioner Problems Common Air Conditioner Problems May 30, 2012 - 6:41pm Addthis A refrigerant leak is one common air conditioning problem. | Photo courtesy of ©iStockphoto/BanksPhotos. A refrigerant leak is one common air conditioning problem. | Photo courtesy of ©iStockphoto/BanksPhotos. What does this mean for me? You can eliminate the most common air conditioner problems before hiring an air conditioning technician. You can do some air conditioner maintenance and repair tasks yourself. One of the most common air conditioning problems is improper operation. If your air conditioner is on, be sure to close your home's windows and outside doors. For room air conditioners, isolate the room or a group of connected rooms as much as possible from the rest of your home.

353

Predictive wavefront control for Adaptive Optics with arbitrary control loop delays  

SciTech Connect

We present a modification of the closed-loop state space model for AO control which allows delays that are a non-integer multiple of the system frame rate. We derive the new forms of the Predictive Fourier Control Kalman filters for arbitrary delays and show that they are linear combinations of the whole-frame delay terms. This structure of the controller is independent of the delay. System stability margins and residual error variance both transition gracefully between integer-frame delays.

Poyneer, L A; Veran, J

2007-10-30T23:59:59.000Z

354

Introduction Air Quality and Nitrogen Dioxide  

E-Print Network (OSTI)

- Global update 2005. Primary sources of air pollutants include combustion products from power generationIntroduction Air Quality and Nitrogen Dioxide Air pollution can be defined as "the presence effects to man and/or the environment". (DEFRA) "Clean air is considered to be a basic requirement

355

INDOOR AIR QUALITY QUESTIONNAIRE HUMAN RESOURCES  

E-Print Network (OSTI)

INDOOR AIR QUALITY QUESTIONNAIRE HUMAN RESOURCES FORM Risk and Compliance | One Washington Square THE AIR QUALITY ISSUE AND LOCATION Name: Date: Department: Phone No: Work Location: Suspected Air Quality, humidity, drafts, stagnant air, odors)? Is there a history of flooding or water damage? If so, please list

Eirinaki, Magdalini

356

AIR QUALITY: Control Enters New Phase  

Science Journals Connector (OSTI)

AIR QUALITY: Control Enters New Phase ... Federal enforcement of air pollution is about to enter a new, more technically sophisticated, phase. ... Now air pollution control moves into the criteria and standards period, when numbers eventually will be the basis for enforcement and the country becomes zoned into 32 air quality regions. ...

1968-08-05T23:59:59.000Z

357

Indoor air quality bill opposed by EPA  

Science Journals Connector (OSTI)

Indoor air quality bill opposed by EPA ... Sen. George J. Mitchell (D.-Me.) has introduced a bill to protect the quality of indoor air. ... According to J. Craig Potter, assistant EPA administrator for air and radiation, the "Indoor Air Quality Act of 1987," S. 1629, is a bill whose time has not yet arrived. ...

LOIS EMBER

1987-12-07T23:59:59.000Z

358

Tips: Air Ducts | Department of Energy  

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

Air Ducts Air Ducts Tips: Air Ducts June 24, 2013 - 7:23pm Addthis Air Ducts: Out of Sight, Out of Mind. The unsealed ducts in your attic and crawlspaces lose air, and uninsulated ducts lose heat -- wasting energy and money. Air Ducts: Out of Sight, Out of Mind. The unsealed ducts in your attic and crawlspaces lose air, and uninsulated ducts lose heat -- wasting energy and money. Your air ducts are one of the most important systems in your home, and if the ducts are poorly sealed or insulated they are likely contributing to higher energy bills. Your home's duct system is a branching network of tubes in the walls, floors, and ceilings; it carries the air from your home's furnace and central air conditioner to each room. Ducts are made of sheet metal, fiberglass, or other materials.

359

Air Breathing Direct Methanol Fuel Cell  

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

Air Breathing Direct Methanol Fuel Cell Air Breathing Direct Methanol Fuel Cell Air Breathing Direct Methanol Fuel Cell An air breathing direct methanol fuel cell is provided with a membrane electrode assembly, a conductive anode assembly that is permeable to air and directly open to atmospheric air, and a conductive cathode assembly that is permeable to methanol and directly contacting a liquid methanol source. Available for thumbnail of Feynman Center (505) 665-9090 Email Air Breathing Direct Methanol Fuel Cell An air breathing direct methanol fuel cell is provided with a membrane electrode assembly, a conductive anode assembly that is permeable to air and directly open to atmospheric air, and a conductive cathode assembly that is permeable to methanol and directly contacting a liquid methanol

360

Chapter 22: Compressed Air Evaluation Protocol  

SciTech Connect

Compressed-air systems are used widely throughout industry for many operations, including pneumatic tools, packaging and automation equipment, conveyors, and other industrial process operations. Compressed-air systems are defined as a group of subsystems composed of air compressors, air treatment equipment, controls, piping, pneumatic tools, pneumatically powered machinery, and process applications using compressed air. A compressed-air system has three primary functional subsystems: supply, distribution, and demand. Air compressors are the primary energy consumers in a compressed-air system and are the primary focus of this protocol. The two compressed-air energy efficiency measures specifically addressed in this protocol are: high-efficiency/variable speed drive (VSD) compressor replacing modulating compressor; compressed-air leak survey and repairs. This protocol provides direction on how to reliably verify savings from these two measures using a consistent approach for each.

Benton, N.

2014-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "air recirculation delay" 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

Chapter 3 - The Science of Air Pollution  

Science Journals Connector (OSTI)

Abstract Air pollution is defined in various ways, with an introduction to numerous air pollutants in this chapter. The evolution of air pollution science, engineering, and technologies is discussed. The distinction between particulate matter and gaseous air pollutants is made. Particles are described physically, especially with regard to the importance of aerodynamic diameter in terms of human health effects. Stationary and mobile sources of air pollution are discussed, as well as the physical and chemical processes involved in chemical transformation and environmental fate. Air pollution engineering's evolution is considered. The chapter discusses in detail the development of air quality standards and the emergence of laws and regulations to address air pollution. The chapter concludes with a timeline of how air pollution has been perceived over history and how air pollution may change in the future.

Daniel Vallero

2014-01-01T23:59:59.000Z

362

Lessons learned in modeling Underfloor Air Distribution system  

E-Print Network (OSTI)

Underfloor Air Distribution (UFAD) Design Guide. Atlanta:for design cooling loads in underfloor air distribution (

Lee, Kwang Ho; Schiavon, Stefano; Webster, Tom; Bauman, Fred; Feng, Jingjuan; Hoyt, Tyler

2011-01-01T23:59:59.000Z

363

Considering Air Density in Wind Power Production  

E-Print Network (OSTI)

In the wind power production calculations the air density is usually considered as constant in time. Using the CIPM-2007 equation for the density of moist air as a function of air temperature, air pressure and relative humidity, we show that it is worth taking the variation of the air density into account, because higher accuracy can be obtained in the calculation of the power production for little effort.

Farkas, Zénó

2011-01-01T23:59:59.000Z

364

Considering Air Density in Wind Power Production  

E-Print Network (OSTI)

In the wind power production calculations the air density is usually considered as constant in time. Using the CIPM-2007 equation for the density of moist air as a function of air temperature, air pressure and relative humidity, we show that it is worth taking the variation of the air density into account, because higher accuracy can be obtained in the calculation of the power production for little effort.

Zénó Farkas

2011-03-11T23:59:59.000Z

365

Investigations on emission characteristics of the pongamia biodiesel–diesel blend fuelled twin cylinder compression ignition direct injection engine using exhaust gas recirculation methodology and dimethyl carbonate as additive  

Science Journals Connector (OSTI)

Experiments were carried out on a twin cylinder direct injection compression ignition engine using pongamia biodiesel–diesel blend as fuel with exhaust gas recirculation (EGR) and dimethyl carbonate (DMC) as additive. The experimental results showed that pongamia biodiesel–diesel blend fuelled engine with EGR and DMC can simultaneously reduce smoke and nitric oxide ( NO x ) emission. The NO x emission was reduced by about 17.68% for 10% of EGR introduction and about 13.55% increase in smoke emission. When dimethyl carbonate was added with EGR the engine emits lower smoke with lesser NO x emission and it showed that the smoke reduction rate had a linear relationship with DMC percentage. The carbon monoxide (CO) and hydrocarbon (HC) emissions also decreased when DMC was added. However the addition of DMC with EGR caused an increase in both BSEC and BTE.

M. Pandian; S. P. Sivapirakasam; M. Udayakumar

2010-01-01T23:59:59.000Z

366

High Energy Efficiency Air Conditioning  

SciTech Connect

This project determined the performance of a new high efficiency refrigerant, Ikon B, in a residential air conditioner designed to use R-22. The refrigerant R-22, used in residential and small commercial air conditioners, is being phased out of production in developed countries beginning this year because of concerns regarding its ozone depletion potential. Although a replacement refrigerant, R-410A, is available, it operates at much higher pressure than R-22 and requires new equipment. R-22 air conditioners will continue to be in use for many years to come. Air conditioning is a large part of expensive summer peak power use in many parts of the U.S. Previous testing and computer simulations of Ikon B indicated that it would have 20 - 25% higher coefficient of performance (COP, the amount of cooling obtained per energy used) than R-22 in an air-cooled air conditioner. In this project, a typical new R-22 residential air conditioner was obtained, installed in a large environmental chamber, instrumented, and run both with its original charge of R-22 and then with Ikon B. In the environmental chamber, controlled temperature and humidity could be maintained to obtain repeatable and comparable energy use results. Tests with Ikon B included runs with and without a power controller, and an extended run for several months with subsequent analyses to check compatibility of Ikon B with the air conditioner materials and lubricant. Baseline energy use of the air conditioner with its original R-22 charge was measured at 90 deg F and 100 deg F. After changeover to Ikon B and a larger expansion orifice, energy use was measured at 90 deg F and 100 deg F. Ikon B proved to have about 19% higher COP at 90 deg F and about 26% higher COP at 100 deg F versus R-22. Ikon B had about 20% lower cooling capacity at 90 deg F and about 17% lower cooling capacity at 100 deg F versus R-22 in this system. All results over multiple runs were within 1% relative standard deviation (RSD). All of these values agree well with previous results and computer simulations of Ikon B performance versus R-22. The lower cooling capacity of Ikon B is not a concern unless a particular air conditioner is near its maximum cooling capacity in application. Typically, oversized A/C systems are installed by contractors to cover contingencies. In the extended run with Ikon B, which lasted about 4.5 months at 100 deg F ambient temperature and 68% compressor on time, the air conditioner performed well with no significant loss of energy efficiency. Post-run analysis of the refrigerant, compressor lubricant oil, compressor, compressor outlet tubing, and the filter/dryer showed minor effects but nothing that was considered significant. The project was very successful. All objectives were achieved, and the performance of Ikon B indicates that it can easily be retrofitted into R-22 air conditioners to give 15 - 20% energy savings and a 1 - 3 year payback of retrofit costs depending on location and use. Ikon B has the potential to be a successful commercial product.

Edward McCullough; Patrick Dhooge; Jonathan Nimitz

2003-12-31T23:59:59.000Z

367

U.S. Air Force Fact Sheet Air Force Reserve Officer Training Corps  

E-Print Network (OSTI)

for the Air Force. Personnel and Resources Air Force Reserve Officer Training Corps (ROTC) includes fourU.S. Air Force Fact Sheet Air Force Reserve Officer Training Corps Mission Develop Quality Leaders Reserve Officer Training Corps is the largest and oldest source of commissioned officers for the Air Force

Su, Xiao

368

AIRS Version 6 Release Level 2 Product User Guide AIRS/AMSU/HSB Version 6  

E-Print Network (OSTI)

AIRS Version 6 Release Level 2 Product User Guide Page 1 AIRS/AMSU/HSB Version 6 Level 2 Product Questions to: http://airs.jpl.nasa.gov/AskAirs #12;AIRS Version 6 Release Level 2 Product User Guide Page 2............................................................................................. 7 1.1 EXAMPLE: LEVEL 2 PHYSICAL RETRIEVAL PRODUCT FILE NAMES

Waliser, Duane E.

369

NAQSAT National Air Quality Site Assessment Tool NAQSAT National Air Quality Site Assessment Tool  

E-Print Network (OSTI)

NAQSAT National Air Quality Site Assessment Tool NAQSAT National Air Quality Site Assessment Tool Air Quality Assessment Tool For Livestock Producers & Advisors #12;NAQSAT The National Air Quality Dairymen National Air Quality Site Assessment Tool Benefits for Producers · Voluntarily and securely assess

370

Numerical Analysis of a Cold Air Distribution System  

E-Print Network (OSTI)

Cold air distribution systems may reduce the operating energy consumption of air-conditioned air supply system and improve the outside air volume percentages and indoor air quality. However, indoor temperature patterns and velocity field are easily...

Zhu, L.; Li, R.; Yuan, D.

2006-01-01T23:59:59.000Z

371

An integrated perspective on assessing agricultural air quality  

E-Print Network (OSTI)

An integrated perspective on assessing agricultural air quality Viney P. Aneja* Department. In this paper, we summarise an integrated assessment framework for studying the agricultural air quality issues air quality; air emissions; air pollution; ammonia; animal feeding operations; biogeochemical cycles

Niyogi, Dev

372

Delayed neutron measurements of 232Th neutron-induced fission  

Science Journals Connector (OSTI)

Abstract Delayed neutrons (DN) play an important role in nuclear reactor physics. Innovative critical reactor studies bring to light the need of new DN yields data. For the thorium fuel cycle DN data for 232Th is needed. In the literature, significant discrepancies were observed for energies below 4 MeV and data are dispersed around 14 MeV. Therefore DN absolute yields from 232Th fission have been determined at the PTB Ion Accelerator Facility in Braunschweig. A consistent set of data has been measured for incident neutrons with energies of 2, 3, 4, 6, 7, 10 and 16 MeV.

X. Ledoux; D. Doré; M. Mosconi; R. Nolte; S. Roettger; S. Varet

2015-01-01T23:59:59.000Z

373

Delay impacts of light rail transit grade crossings  

E-Print Network (OSTI)

with the cross i n g control operating independently of the other parts of the signal system. The LRT vehicles recei ve unconditional priority at a 1 1 times. The LRT system in this anal ysi s was depicted as operating on semi -exclusive right-of-way. Median... . 25 Figure 9. Isolated Crossing-Effect of Crossing Clearance Time . 26 Figure 10. Isolated Crossing-Effect of Roadway Cross-Section . . . 28 Figure 11. Isolated Crossing-Delay per Vehicle vs. Crossing Volume-to-Capacity Ratio-Scatter Plot . 30...

Cline, James Curtiss

2012-06-07T23:59:59.000Z

374

Delayed choice experiments, the arrow of time, and quantum measurement  

SciTech Connect

By a radical modification of statistical mechanics the measurement process of quantum mechanics can be described in terms of pure, unitary time evolution, with no wave function collapse or many-world ideas. The key notion is 'special states', rare microscopic states of a complex system. Recovering the standard probabilities requires of this theory the appearance of Cauchy-distributed noise in some measurement processes. This article treats experimental situations where such noise might be detected and correlated with the need or absence of need for special states. Included in this possibility are 'delayed choice' experiments, in which the correlation contravenes conventional ideas on causality. Background material on all topics is provided.

Schulman, L. S. [Physics Department, Clarkson University, Potsdam, New York 13699-5820 (United States)

2011-11-29T23:59:59.000Z

375

AIR POLLUTION: Diesel Fuel Culprits  

Science Journals Connector (OSTI)

AIR POLLUTION: Diesel Fuel Culprits ... Low-molecular-weight components aren't necessarily the true culprits of diesel fuel pollution, although they do contribute to it, according to Hertha Skala, assistant director of research, and her coworkers F. G. Padrta and P. C. Samson at Universal Oil Products. ... At the first national symposium on heterogeneous catalysis for control of air pollution, sponsored by Philadelphia's Franklin Institute, Mrs. Skala identified five different classes of oxygenated hydrocarbons found over the full molecular-weight range of diesel fuel components. ...

1968-12-02T23:59:59.000Z

376

Optimising the Fresh Air Economiser  

E-Print Network (OSTI)

Optimising the Fresh Air Economiser Rob Bishop Technical Director Energy Solutions Ltd. Wellington New Zealand ABSTRACT This paper proposes using measurements of CO2 to infer the amount of Outside Air (OA) ventilation delivered to a... and the number of occupants only, but since 2004 has also included a value based on the floor area of the space. In New Zealand, the ventilation code is based on ASHRAE Standard 62:1989 (with local amendments), and has not been updated to include the area...

Biship, R.

2013-01-01T23:59:59.000Z

377

Study of calculated and measured time dependent delayed neutron yields. [TX, for calculating delayed neutron yields; MATINV, for matrix inversion; in FORTRAN for LSI-II minicomputer  

SciTech Connect

Time-dependent delayed neutron emission is of interest in reactor design, reactor dynamics, and nuclear physics studies. The delayed neutrons from neutron-induced fission of /sup 232/U, /sup 237/Np, /sup 238/Pu, /sup 241/Am, /sup 242m/Am, /sup 245/Cm, and /sup 249/Cf were studied for the first time. The delayed neutron emission from /sup 232/Th, /sup 233/U, /sup 235/U, /sup 238/U, /sup 239/Pu, /sup 241/Pu, and /sup 242/Pu were measured as well. The data were used to develop an empirical expression for the total delayed neutron yield. The expression gives accurate results for a large variety of nuclides from /sup 232/Th to /sup 252/Cf. The data measuring the decay of delayed neutrons with time were used to derive another empirical expression predicting the delayed neutron emission with time. It was found that nuclides with similar mass-to-charge ratios have similar decay patterns. Thus the relative decay pattern of one nuclide can be established by any measured nuclide with a similar mass-to-charge ratio. A simple fission product yield model was developed and applied to delayed neutron precursors. It accurately predicts observed yield and decay characteristics. In conclusion, it is possible to not only estimate the total delayed neutron yield for a given nuclide but the time-dependent nature of the delayed neutrons as well. Reactors utilizing recycled fuel or burning actinides are likely to have inventories of fissioning nuclides that have not been studied until now. The delayed neutrons from these nuclides can now be incorporated so that their influence on the stability and control of reactors can be delineated. 8 figures, 39 tables.

Waldo, R.W.

1980-05-01T23:59:59.000Z

378

Air Sealing Your Home | Department of Energy  

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

Air Sealing Your Home Air Sealing Your Home Air Sealing Your Home November 26, 2013 - 6:22pm Addthis Save on heating and cooling costs by checking for air leaks in common trouble spots in your home. Save on heating and cooling costs by checking for air leaks in common trouble spots in your home. What does this mean for me? Save money and energy by air sealing your house. Caulking and weatherstripping are simple, effective ways of sealing air leaks in your home. Reducing the amount of air that leaks in and out of your home is a cost-effective way to cut heating and cooling costs, improve durability, increase comfort, and create a healthier indoor environment. Caulking and weatherstripping are two simple and effective air-sealing techniques that offer quick returns on investment, often one year or less. Caulk is

379

Maintaining Your Air Conditioner | Department of Energy  

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

Maintaining Your Air Conditioner Maintaining Your Air Conditioner Maintaining Your Air Conditioner June 18, 2013 - 6:20pm Addthis Replacing or cleaning air conditioner filters is a critical maintenance task. | Photo courtesy of ©iStockphoto/firemanYU. Replacing or cleaning air conditioner filters is a critical maintenance task. | Photo courtesy of ©iStockphoto/firemanYU. What does this mean for me? Regular maintenance keeps your air conditioner running as efficiently as possible. Maintaining your air conditioner will save you money by extending the unit's life. An air conditioner's filters, coils, and fins require regular maintenance for the unit to function effectively and efficiently throughout its years of service. Neglecting necessary maintenance ensures a steady decline in air conditioning performance while energy use steadily increases.

380

Maintaining Your Air Conditioner | Department of Energy  

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

Maintaining Your Air Conditioner Maintaining Your Air Conditioner Maintaining Your Air Conditioner June 18, 2013 - 6:20pm Addthis Replacing or cleaning air conditioner filters is a critical maintenance task. | Photo courtesy of ©iStockphoto/firemanYU. Replacing or cleaning air conditioner filters is a critical maintenance task. | Photo courtesy of ©iStockphoto/firemanYU. What does this mean for me? Regular maintenance keeps your air conditioner running as efficiently as possible. Maintaining your air conditioner will save you money by extending the unit's life. An air conditioner's filters, coils, and fins require regular maintenance for the unit to function effectively and efficiently throughout its years of service. Neglecting necessary maintenance ensures a steady decline in air conditioning performance while energy use steadily increases.

Note: This page contains sample records for the topic "air recirculation delay" 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

Exergy efficiency of a counterflow air/air heat exchanger with vapour condensation  

Science Journals Connector (OSTI)

The exergy efficiency of a counterflow hot moist air/...?1 for the temperature and humidity ratio of hot moist air respectively are considered. Constant ambient air conditions of 20°C and 0.01 kg·kg?1 were assume...

J. Jilek; J. H. Young

1993-01-01T23:59:59.000Z

382

Review: Clearing the Air: The Health and Economic Damages of Air Pollution in China  

E-Print Network (OSTI)

the assessment of air pollution and its health and economiclargest source of health damages of air pollution in China,to air pollution, and the economic evaluations of health

Lee, Joseph

2009-01-01T23:59:59.000Z

383

Air quality, infant mortality, and the Clean Air Act of 1970  

E-Print Network (OSTI)

We examine the effects of total suspended particulates (TSPs) air pollution on infant health using the air quality improvements induced by the 1970 Clean Air Act Amendments (CAAA). This legislation imposed strict regulations ...

Chay, Kenneth Y.

2003-01-01T23:59:59.000Z

384

Urban Air Quality Management: Detecting and Improving Indoor Ambient Air Quality  

Science Journals Connector (OSTI)

Current air pollution management and air quality control are primarily focused on outdoor and ... which act as public spaces, contaminated indoor air could be public health hazards. In Singapore ... spend a subst...

T. L. Tan; Gissella B. Lebron

2011-01-01T23:59:59.000Z

385

Shapiro delay measurement of a two solar mass neutron star  

E-Print Network (OSTI)

Neutron stars are composed of the densest form of matter known to exist in our universe, and thus provide a unique laboratory for exploring the properties of cold matter at super-nuclear density. Measurements of the masses or radii of these objects can strongly constrain the neutron-star matter equation of state, and consequently the interior composition of neutron stars. Neutron stars that are visible as millisecond radio pulsars are especially useful in this respect, as timing observations of the radio pulses provide an extremely precise probe of both the pulsar's motion and the surrounding space-time metric. In particular, for a pulsar in a binary system, detection of the general relativistic Shapiro delay allows us to infer the masses of both the neutron star and its binary companion to high precision. Here we present radio timing observations of the binary millisecond pulsar PSR J1614-2230, which show a strong Shapiro delay signature. The implied pulsar mass of 1.97 +/- 0.04 M_sun is by far the highest yet measured with such certainty, and effectively rules out the presence of hyperons, bosons, or free quarks at densities comparable to the nuclear saturation density.

Paul Demorest; Tim Pennucci; Scott Ransom; Mallory Roberts; Jason Hessels

2010-10-27T23:59:59.000Z

386

Beta-delayed proton emission in the 100Sn region  

E-Print Network (OSTI)

Beta-delayed proton emission from nuclides in the neighborhood of 100Sn was studied at the National Superconducting Cyclotron Laboratory. The nuclei were produced by fragmentation of a 120 MeV/nucleon 112Sn primary beam on a Be target. Beam purification was provided by the A1900 Fragment Separator and the Radio Frequency Fragment Separator. The fragments of interest were identified and their decay was studied with the NSCL Beta Counting System (BCS) in conjunction with the Segmented Germanium Array (SeGA). The nuclei 96Cd, 98Ing, 98Inm and 99In were identified as beta-delayed proton emitters, with branching ratios bp = 5.5(40)%, 5.5+3 -2%, 19(2)% and 0.9(4)%, respectively. The bp for 89Ru, 91,92Rh, 93Pd and 95Ag were deduced for the first time with bp = 3+1.9 -1.7%, 1.3(5)%, 1.9(1)%, 7.5(5)% and 2.5(3)%, respectively. The bp = 22(1)% for 101Sn was deduced with higher precision than previously reported. The impact of the newly measured bp values on the composition of the type-I X-ray burst ashes was studied.

Lorusso, G; Amthor, A; Baumann, T; Bazin, D; Berryman, J S; Brown, B A; Cyburt, R H; Crawford, H L; Estrade, A; Gade, A; Ginter, T; Guess, C J; Hausmann, M; Hitt, G W; Mantica, P F; Matos, M; Meharchand, R; Minamisono, K; Montes, F; Perdikakis, G; Pereira, J; Portillo, M; Schatz, H; Smith, K; Stoker, J; Stolz, A; Zegers, R G T

2012-01-01T23:59:59.000Z

387

Oil and Gas Air Heaters  

E-Print Network (OSTI)

ICEBO2006, Shenzhen, China Heating technologies for energy efficiency Vol.III-1-2 Oil and Gas Air Heaters1 Guangxiao Kou Hanqing Wang Jiemin Zhou Doctoral Ph.D Ph.D Candidate Professor Professor Hunan University of Technology Hunan...

Kou, G.; Wang, H.; Zhou, J.

2006-01-01T23:59:59.000Z

388

AN IMPROVED AIR-ENGINE  

Science Journals Connector (OSTI)

...bottom of the reverser heater; a cooler, composed...opposite, and the cold chamber above the...and over again. In operation, the alternate raising...mass of air in the cold chamber above the...surface of the reverser heater, thereby becoming...contrary, withstand bad weather and parasites, and...

1889-08-16T23:59:59.000Z

389

Air Capture Introduction and Overview  

E-Print Network (OSTI)

first." It is much cheaper to capture CO2 from the flue gas of a coal power plant than from ambient air largely eliminated centralized sources of CO2 emissions, especially at coal and natural gas power plants of a facility that captures CO2 from the flue gas of a coal power plant, keeping all possible assumptions

390

Air pollution control: Indoor hazards  

Science Journals Connector (OSTI)

... the need for further study of the health effects of indoor air pollution, ranging from radon emitted by building materials to the second-hand effects of cigarette smoke, and the ... overlooked in research on the health effects of environmental pollutants. In some cases,such as radon, the report says that there is an "urgent need" to study such health ...

David Dickson

1981-09-10T23:59:59.000Z

391

AIR FORCE SPECIAL WEAPONS CENTER  

Office of Legacy Management (LM)

HEADQUARTERS aII?y HEADQUARTERS aII?y 9 AIR FORCE SPECIAL WEAPONS CENTER 1 AIR FORCE SYSTEMS COMMAND . - KlRTlAND AIR FORCE BASE, NEW MEXICO - k FINAL REPORT O N AIR FORCE PARTICIPATION PROJECT RULISON .1 O c t o b e r 1969 P r e p a r e d by : CONT INENTAL TEST D I V I S ION DIRECTORATE OF NUCLEAR FIELD OPERATIONS This page intentionally left blank INDEX AIR FORCE PARTICIPATION I N PROJECT RULISON FINAL REPORT PARAGRAPH BASIC REPORT SUBJECT R e f e r e n c e s PAGE 2 G e n e r a l 1 3 P l a n n i n g 3 4 Command a n d C o n t r o l 5 O p e r a t i o n s , G r a n d ' J u n c t i o n M u n i c i p a l A i r p o r t . . ' A i r O p e r a t i o n s C e n t e r , He1 i c o p t e r P a d / ' 7.. - . M a t e r i e l : ' 8 M e d i c a l 1 9 R a d - S a f e C r a s h - R e s c u e S e c u r i t y 2 1 C o m m u n i c a t i o n s ~ d m i n i s t r a t ' i o n Summary ATTACHMENTS ATTACHMENT SUBJECI' 1 F r a g O r d e r 69-1 ( ~ r o j ' e c t RULISON) , AFSWC D

392

Air Pollution Control (Oklahoma) | Department of Energy  

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

Air Pollution Control (Oklahoma) Air Pollution Control (Oklahoma) Air Pollution Control (Oklahoma) < Back Eligibility Agricultural Fuel Distributor Industrial Investor-Owned Utility Local Government Municipal/Public Utility Rural Electric Cooperative State/Provincial Govt Systems Integrator Tribal Government Utility Savings Category Buying & Making Electricity Program Info State Oklahoma Program Type Environmental Regulations Provider Environmental Quality This chapter enumerates primary and secondary ambient air quality standards and the significant deterioration increments. Significant deterioration refers to an increase in ambient air pollution above a baseline plus a specific increment allowed for one of three classes of areas. It is required for potential sources of air contaminants to register with the

393

E-Print Network 3.0 - air-to-air heat pumps Sample Search Results  

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

conditions... data on the seasonal performance of air-to-air residential heat pump systems. The purpose of this paper... of operation 10, 197778, the Control House ......

394

BaP Air Quality Modelling Simulation Using CMAQ Air Quality Modelling System  

Science Journals Connector (OSTI)

Air Quality Modelling has become an essential tool to ... in the atmosphere by using last generation of air quality dispersion models with the inclusion of the...

R San José; JL Pérez; M Callen; JM López; A Mastral

2013-01-01T23:59:59.000Z

395

Compressed Air Energy Savings: SAV-AIR Monitor and Control System and the PNW Compressed Air Challenge  

E-Print Network (OSTI)

This paper presents the results from two compressed air programs supported by the Northwest Energy Efficiency Alliance (Alliance) over the last five years. In 1997 the Alliance funded the Northwest regional version of the Compressed Air Challenge...

Anderson, K. J.; Annen, B.; Scott, S.

396

Periodic and chaotic oscillations in a tumor and immune system interaction model with three delays  

SciTech Connect

In this paper, a tumor and immune system interaction model consisted of two differential equations with three time delays is considered in which the delays describe the proliferation of tumor cells, the process of effector cells growth stimulated by tumor cells, and the differentiation of immune effector cells, respectively. Conditions for the asymptotic stability of equilibria and existence of Hopf bifurcations are obtained by analyzing the roots of a second degree exponential polynomial characteristic equation with delay dependent coefficients. It is shown that the positive equilibrium is asymptotically stable if all three delays are less than their corresponding critical values and Hopf bifurcations occur if any one of these delays passes through its critical value. Numerical simulations are carried out to illustrate the rich dynamical behavior of the model with different delay values including the existence of regular and irregular long periodic oscillations.

Bi, Ping [Department of Mathematics, Shanghai Key Laboratory of PMMP, East China Normal University, 500 Dongchuan Rd., Shanghai 200241 (China) [Department of Mathematics, Shanghai Key Laboratory of PMMP, East China Normal University, 500 Dongchuan Rd., Shanghai 200241 (China); Center for Partial Differential Equations, East China Normal University, 500 Dongchuan Rd., Shanghai 200241 (China); Ruan, Shigui, E-mail: ruan@math.miami.edu [Department of Mathematics, University of Miami, Coral Gables, Florida 33124-4250 (United States)] [Department of Mathematics, University of Miami, Coral Gables, Florida 33124-4250 (United States); Zhang, Xinan [School of Mathematics and Statistics, Central China Normal University, Wuhan 430079 (China)] [School of Mathematics and Statistics, Central China Normal University, Wuhan 430079 (China)

2014-06-15T23:59:59.000Z

397

Building America Top Innovations Hall of Fame Profile … Outside Air Ventilation Controller  

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

partner Davis Energy partner Davis Energy Group worked with Monley Cronin Construction to build 100 energy-efficient homes in Woodland, CA, with night- cooling ventilation systems. BUILDING AMERICA TOP INNOVATIONS HALL OF FAME PROFILE INNOVATIONS CATEGORY: 1. Advanced Technologies and Practices 1.3 Assured Health, Safety, and Durability Outside Air Ventilation Controller Building America researchers developed technologies to harness the natural day-night temperature swings in the U.S. Southwest to cut cooling energy peak demand with no compromise in comfort. Building America research has shown that, in dry climates, the use of ventilation cooling can significantly reduce, delay, or completely eliminate air conditioner operation resulting in both energy savings and reduction of peak demand

398

Studies of Cosmic Ray Composition and Air Shower Structure with the Pierre Auger Observatory  

SciTech Connect

These are presentations to be presented at the 31st International Cosmic Ray Conference, in Lodz, Poland during July 2009. It consists of the following presentations: (1) Measurement of the average depth of shower maximum and its fluctuations with the Pierre Auger Observatory; (2) Study of the nuclear mass composition of UHECR with the surface detectors of the Pierre Auger Observatory; (3) Comparison of data from the Pierre Auger Observatory with predictions from air shower simulations: testing models of hadronic interactions; (4) A Monte Carlo exploration of methods to determine the UHECR composition with the Pierre Auger Observatory; (5) The delay of the start-time measured with the Pierre Auger Observatory for inclined showers and a comparison of its variance with models; (6) UHE neutrino signatures in the surface detector of the Pierre Auger Observatory; and (7) The electromagnetic component of inclined air showers at the Pierre Auger Observatory.

Abraham, : J.; Abreu, P.; Aglietta, M.; Aguirre, C.; Ahn, E.J.; Allard, D.; Allekotte, I.; Allen, J.; Alvarez-Muniz, J.; Ambrosio, M.; Anchordoqui, L.

2009-06-01T23:59:59.000Z

399

The investigation of exhaust powered, automotive air cycle air conditioning  

E-Print Network (OSTI)

Pressure Ratio Net Power Test Apparatus Available Turbocompressors Turbine and Compressor Wheels Mounted to Shaft Turbocompressor Mounted. to Exhaust Line Total System Test Rig Full Throttle Performance Curves Subscript 'c' Corrected Results 13 13... an automotive air cycle unit which employed a rotary- vaned compressor. The prototype unit developed. cooling over various engine speeds because of the compressor being a positive displacement type which developed fairly high pressures on the order of 40 psia...

Holley, James Andrew

1978-01-01T23:59:59.000Z

400

E-Print Network 3.0 - access delay applications Sample Search...  

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

We solve the above problem in three consecutive steps Summary: Joint Power Control and Scheduling for Delay- Constrained Applications over CDMA-based Wireless Ad......

Note: This page contains sample records for the topic "air recirculation delay" 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

Evaluation of concrete structures affected by alkali-silica reaction and delayed ettringite formation.  

E-Print Network (OSTI)

??Alkali-silica reaction (ASR) and delayed ettringite formation (DEF) are expansive reactions that can lead to the premature deterioration of concrete structures. Both have been implicated… (more)

Giannini, Eric Richard

2012-01-01T23:59:59.000Z

402

Effect of curing conditions and concrete mix design on the expansion generated by delayed ettringite formation  

Science Journals Connector (OSTI)

Many studies have shown the effect of different parameters on the expansion induced by delayed ettringite formation (DEF), but there is not...

X. Brunetaud; R. Linder; L. Divet; D. Duragrin; D. Damidot

2007-07-01T23:59:59.000Z

403

Nondestructive evaluation of reinforced concrete structures affected by alkali-silica reaction and delayed ettringite formation.  

E-Print Network (OSTI)

??Alkali-silica reaction (ASR) and delayed ettringite formation (DEF) deterioration have been a problem for the concrete infrastructure in the state of Texas and around the… (more)

Kreitman, Kerry Lynn

2011-01-01T23:59:59.000Z

404

A study of microstrip delay lines on high dielectric constant substrates.  

E-Print Network (OSTI)

??Microstrip delay lines have many possible applications in today's world of high frequency communications and radar systems. High dielectric constant (high-x) substrates allow for the… (more)

Ashour, Thomas Joseph

2012-01-01T23:59:59.000Z

405

Detecting Air Leaks | Department of Energy  

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

Detecting Air Leaks Detecting Air Leaks Detecting Air Leaks September 27, 2012 - 6:39pm Addthis For a thorough and accurate measurement of air leakage in your home, hire a qualified technician to conduct an energy assessment, particularly a blower door test. For a thorough and accurate measurement of air leakage in your home, hire a qualified technician to conduct an energy assessment, particularly a blower door test. You may already know where some air leakage occurs in your home, such as an under-the-door draft, but you'll need to find the less obvious gaps to properly air seal your home. For a thorough and accurate measurement of air leakage in your home, hire a qualified technician to conduct an energy assessment, particularly a blower door test. A blower door test, which depressurizes a home, can

406

Improving Regional Air Quality with Wind Power  

Wind Powering America (EERE)

Improving Regional Air Quality with Improving Regional Air Quality with Wind Power National Renewable Energy Laboratory Improving Regional Air Quality with Wind Power National Renewable Energy Laboratory * Clean Air Act (CAA) framework * Air quality challenges * CAA policies as market drivers * Met. Wash. Council of Governments (MWCOG) case study * Environmental Protection Agency (EPA) guidance on State Implementation Plan (SIP) credit for EERE * Model SIP documentation for wind purchases * Related marketing innovations Overview Overview * CAA requires regional air quality plans (SIPs) * "Window of opportunity" - Revised SIPs required by 2006/2007 to meet new 8-hour ozone and PM standards - August 2004 EPA guidance and NREL model SIP documentation for wind purchases Clean Air Act Framework Clean Air Act Framework

407

Air-Conditioning Basics | Department of Energy  

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

Air-Conditioning Basics Air-Conditioning Basics Air-Conditioning Basics August 16, 2013 - 1:59pm Addthis Air conditioning is one of the most common ways to cool homes and buildings. How Air Conditioners Work Air conditioners employ the same operating principles and basic components as refrigerators. Refrigerators use energy (usually electricity) to transfer heat from the cool interior of the refrigerator to the relatively warm surroundings; likewise, an air conditioner uses energy to transfer heat from the interior space to the relatively warm outside environment. An air conditioner uses a cold indoor coil called the evaporator. The condenser, a hot outdoor coil, releases the collected heat outside. The evaporator and condenser coils are serpentine tubing surrounded by aluminum fins. This tubing is usually made of copper.

408

Clean Air Act Amendments of 1990  

E-Print Network (OSTI)

Congress is currently debating amendments to the Clean Air Act which would strengthen and enhance the current Clean Air Act. The bill would guarantee a reduction of 10 million tons of sulfur dioxide from 1980 levels; would sharply reduce pollutants...

Hanneschlager, R. E.

409

Environmental History of Air Pollution and Protection  

Science Journals Connector (OSTI)

Concerns about air pollution have a long and complex history. Complaints ... of ancient Athens and Rome. But urban air quality worsened considerably during the Industrial Revolution, ... Despite the tangible natu...

Stephen Mosley

2014-01-01T23:59:59.000Z

410

Ambient Air Quality Criteria (Manitoba, Canada)  

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

The Manitoba Ambient Air Quality Criteria schedule lists maximum time-based pollutant concentration levels for the protection and preservation of ambient air quality within the Province of Manitoba...

411

A New Approach to Industrial Air Conditioning  

E-Print Network (OSTI)

-dryer Systems Division, has marketed industrial drying machinery. These heat reactivated dryers can handle latent loads in industrial air conditioning systems. Through waste heat conservation, air conditioning costs can be reduced 25 to 50%, with applications...

Gravenstreter, T.

1982-01-01T23:59:59.000Z

412

Evolution of US air cargo productivity  

E-Print Network (OSTI)

This thesis provides an overview of the US air cargo industry since airline deregulation in 1978, including a brief overview of the historical evolution of air cargo transport in the US from the early 1900s until the late ...

Donatelli, David J

2012-01-01T23:59:59.000Z

413

Advanced Management of Compressed Air Systems  

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

Find out how a compressed air system works and the benefits of optimal compressed air system performance. This training is designed to help end users as well as industry solution providers learn...

414

EVENT CLOUDS : lighter than air architectural structures  

E-Print Network (OSTI)

EVENT CLOUD is a versatile covering system that allows events to happen independently to weather conditions. It consists of a lighter than air pneumatic structure, filled either with helium or hot air, that covers spaces ...

Peydro Duclos, Ignacio

2014-01-01T23:59:59.000Z

415

Air America: Upholding the Airmen's Bond  

E-Print Network (OSTI)

. Ed Adams, Air America, Conducted rescue operations in Laos and South Vietnam Mr. Marius Burke, Air America, Conducted rescue operations in Laos and South Vietnam Mr. Robert Grealy, CIA, Retired Senior

Kilgard, Michael P.

416

Adverse Health Effects of Air Pollution  

E-Print Network (OSTI)

on clean air: ? 2007: Encouraging energy efficiencies, no more coal plants ? 2009: Retrofitting old coal plants and old diesel engines ? 2011: Disclosure of ?fracking? fluids injected below ground ? Alliance with Texas Business for Clean Air ? Financed...

Haley, R. W.

2011-01-01T23:59:59.000Z

417

Indoor air pollution: a public health perspective  

Science Journals Connector (OSTI)

...control tobacco smoke or gas adsorbers, air filters, and electrostatic tion by-products...ventilation air; formaldehyde sorbant filters Behavioral adjustment: Reduction in human...monitoring equipment, and performance of HVAC systems Table 4. Components of comprehensive...

JD Spengler; K Sexton

1983-07-01T23:59:59.000Z

418

Protective supplied-breathing-air garment  

DOE Patents (OSTI)

A breathing-air garment for isolating a wearer from hostile environments containing toxins or irritants is disclosed. The garment includes a suit and a separate head-protective enclosure or hood engaging a suit collar in sealing attachment. The hood and suit collar are cylindrically shaped and dimensioned to enable the wearer to withdraw his hands from the suit sleeves to perform manual tasks within the hood interior. Breathing air is supplied from an external air line with an air-delivery hose attached to the hood interior. The hose feeds air into an annular halo-like fiber-filled plenum having spaced discharge orifices attached to the hood top wall. A plurality of air exhaust/check valves located at the suit extremities cooperate with the hood air-delivery system to provide a cooling flow of circulating air from the hood throughout the suit interior. A suit entry seal provided on the suit sealed with an adhesive sealing flap.

Childers, E.L.; von Hortenau, E.F.

1982-05-28T23:59:59.000Z

419

Air pollution: Clean up our skies  

Science Journals Connector (OSTI)

... SLCPs cause poor air quality and are responsible for respiratory and cardiovascular diseases. Particulate matter in the atmosphere ... . Particulate matter in the atmosphere is the leading environmental cause of ill health, and air ...

Julia Schmale; Drew Shindell; Erika von Schneidemesser; Ilan Chabay; Mark Lawrence

2014-11-19T23:59:59.000Z

420

Efficient Algorithms for Renewable Energy Allocation to Delay Tolerant Consumers  

E-Print Network (OSTI)

We investigate the problem of allocating energy from renewable sources to flexible consumers in electricity markets. We assume there is a renewable energy supplier that provides energy according to a time-varying (and possibly unpredictable) supply process. The plant must serve consumers within a specified delay window, and incurs a cost of drawing energy from other (possibly non-renewable) sources if its own supply is not sufficient to meet the deadlines. We formulate two stochastic optimization problems: The first seeks to minimize the time average cost of using the other sources (and hence strives for the most efficient utilization of the renewable source). The second allows the renewable source to dynamically set a price for its service, and seeks to maximize the resulting time average profit. These problems are solved via the Lyapunov optimization technique. Our resulting algorithms do not require knowledge of the statistics of the time-varying supply and demand processes and are robust to arbitrary samp...

Neely, Michael J; Dimakis, Alexandros G

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "air recirculation delay" 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

Center Manifold Analysis of Delayed Lienard Equation and Its Applications  

E-Print Network (OSTI)

];Rn), then for any t 2 [t0;t0 + d], let xt 2 C be deflned by xt( ) = x(t+ );?? 6 6 0. The following relation _x = f(t;xt); (2.1) is called functional difierential equation. Equations of this type are very general and it includes delay difierential equation (DDE). A... function x is said to be a solution of (2.1) if there exists t0 2 R;d > 0 5 such that x 2 C([t0 ? ?;t0 + A];Rn) and x satisfles (2.1) for t 2 (t0;t0 + d). In this case x is deflned as a solution of (2.1) on [t0 ? ?;t0 + d) with initial condition x(t0...

Zhao, Siming

2010-01-14T23:59:59.000Z

422

Experimental entanglement-assisted quantum delayed-choice experiment  

E-Print Network (OSTI)

The puzzling properties of quantum mechanics, wave-particle duality, entanglement and superposition, were dissected experimentally at past decades. However, hidden-variable (HV) models, based on three classical assumptions of wave-particle objectivity, determinism and independence, strive to explain or even defeat them. The development of quantum technologies enabled us to test experimentally the predictions of quantum mechanics and HV theories. Here, we report an experimental demonstration of an entanglement-assisted quantum delayed-choice scheme using a liquid nuclear magnetic resonance quantum information processor. This scheme we realized is based on the recently proposed scheme [Nat. Comms. 5:4997(2014)], which gave different results for quantum mechanics and HV theories. In our experiments, the intensities and the visibilities of the interference are in consistent the theoretical prediction of quantum mechanics. The results imply that a contradiction is appearing when all three assumptions of HV models are combined, though any two of the above assumptions are compatible with it.

Tao Xin; Hang Li; Bi-Xue Wang; Gui-Lu Long

2014-11-30T23:59:59.000Z

423

Effects of restraint on expansion due to delayed ettringite formation  

Science Journals Connector (OSTI)

Delayed ettringite formation (DEF) is a chemical reaction that causes expansion in civil engineering structures. The safety level of such damaged structures has to be reassessed. To do this, the mechanical conditions acting on DEF expansions have to be analysed and, in particular, the variation of strength with expansion and the effect of restraint on the DEF expansion. This paper highlights several points: DEF expansion is isotropic in stress-free conditions, compressive stresses decrease DEF expansion in the direction subjected to restraint and lead to cracks parallel to the restraint, and expansion measured in the stress-free direction of restrained specimens is not modified. Thus restraint causes a decrease of the volumetric expansion and DEF expansion under restraint is anisotropic. Moreover, the paper examines the correlation between DEF expansion and concrete damage, providing data that can be used for the quantification of the effect of stresses on DEF induced expansion.

Hassina Bouzabata; Stéphane Multon; Alain Sellier; Hacène Houari

2012-01-01T23:59:59.000Z

424

The impact of cement parameters on Delayed Ettringite Formation  

Science Journals Connector (OSTI)

Delayed Ettringite Formation (DEF) in concrete is likely to lead to swelling and cracking in structures which have undergone early age heating to a temperature of over 65 °C. Application of a method that accelerates this process has made it possible to study the impact of cement properties on DEF. For two temperatures reached by the concrete (75 °C or 85 °C), the study considers a domain defined by the sulphate content [2.6–3.6%], the alkali content [0.5–1%] and the Blaine specific area [3330–4635 cm2/g] of the cement. The impact of these parameters and the interactions between them on swelling are discussed. Monitoring of the dynamic elastic modulus of the concretes shows that this property may be reduced by DEF, but that it may increase again once the swelling process has ceased, probably due to the gradual filling of voids by ettringite formed under conditions of limited supersaturation.

A. Pavoine; X. Brunetaud; L. Divet

2012-01-01T23:59:59.000Z

425

Compressed Air Energy Storage for Offshore  

E-Print Network (OSTI)

transmitting peak power levels. A solution to these issues is a novel high-efficiency compressed air energy

Perry Y. Li; Eric Loth; Terrence W. Simon; James D. Van De Ven; Stephen E. Crane

2011-01-01T23:59:59.000Z

426

Preventive Maintenance Strategies for Compressed Air Systems  

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

This tip sheet discusses preventive maintenance strategies for compressed air systems to avoid high equipment repair and replacement costs.

427

Capturing Carbon Dioxide From Air  

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

Capturing Carbon Dioxide From Air Capturing Carbon Dioxide From Air Klaus S. Lackner (kl2010@columbia.edu; 212-854-0304) Columbia University 500 West 120th Street New York, NY 10027 Patrick Grimes (pgrimes@worldnet.att.net; 908-232-1134) Grimes Associates Scotch Plains, NJ 07076 Hans-J. Ziock (ziock@lanl.gov; 505-667-7265) Los Alamos National Laboratory P.O.Box 1663 Los Alamos, NM 87544 Abstract The goal of carbon sequestration is to take CO 2 that would otherwise accumulate in the atmosphere and put it in safe and permanent storage. Most proposed methods would capture CO 2 from concentrated sources like power plants. Indeed, on-site capture is the most sensible approach for large sources and initially offers the most cost-effective avenue to sequestration. For distributed, mobile sources like cars, on-board capture at affordable cost would not be

428

Clean Air Act, Section 309  

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

CLEAN AIR ACT § 309* CLEAN AIR ACT § 309* §7609. Policy review (a) The Administrator shall review and comment in writing on the environmental impact of any matter relating to duties and responsibilities granted pursuant to this chapter or other provisions of the authority of Administrator, contained in any (1) legislation proposed by any Federal department or agency, (2) newly authorized Federal projects for construction and any major Federal agency action (other than a project for construction) to which section 4332(2)(C) of this title applies, and (3) proposed regulations published by any department or agency of the Federal Government. Such written comment shall be made public at the conclusion of any such review. (b) In the event the Administrator determines that any such legislation, action, or regulation

429

NETL: Air Quality III Conference  

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

Air Quality III Conference - September 12, 2002 Air Quality III Conference - September 12, 2002 Table of Contents Disclaimer Papers and Presentations Disclaimer This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government or 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 agency thereof. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof.

430

Airvest's Breath of Fresh Air  

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

7 7 The Cutting Edge: Airvest's Breath of Fresh Air Spray booths are a common sight in the industrial sector. Designed to remove pollutants during industrial processes such as spray painting or welding, a booth is a rectangular enclosure open on one side where the worker stands, and equipped on the opposite wall with a fan and filter arrangement to suck away the dirty air. The full-size mannequin in these photographs simulates a worker in a spray booth facing the exhaust filters. In experiments designed by LBL researcher Ashok Gadgil, smoke was released in front of the mannequin to simulate the spraying of paint in the booth. The photo on the left shows the spray booth during standard operation. The smoke-representing a pollutant-is entrained in the eddy that forms in

431

Making Li-air batteries rechargeable: material challenges. |...  

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

Li-air batteries rechargeable: material challenges. Making Li-air batteries rechargeable: material challenges. Abstract: A Li-air battery could potentially provide three to five...

432

Health effects of air pollution: some historical notes.  

E-Print Network (OSTI)

that was his first air pollution health effects committeeand direction of air pollution health effects research inof community air pollution, including health ef- fects, has

Whittenberger, J L

1989-01-01T23:59:59.000Z

433

Assessments of biofuel sustainability: air pollution and health impacts  

E-Print Network (OSTI)

Sustainability: Air Pollution and Health Impacts By Chi-and indirect air-pollution and health impacts throughout theparticularly air pollution and health impacts. In this

Tsao, Chi-Chung

2012-01-01T23:59:59.000Z

434

High-Efficiency Window Air Conditioners - Building America Top...  

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

Window Air Conditioners - Building America Top Innovation This photo shows a window air conditioning unit in place in a window frame. Window air conditioners are inexpensive,...

435

New indicator approaches for effective urban air quality management  

Science Journals Connector (OSTI)

Measurements of urban air quality at monitoring stations in developed countries have frequently involved the criteria gaseous pollutants, particulates, hazardous air pollutants, perceived air quality and relev...

Peter J. Peterson; W. Peter Williams

1999-12-01T23:59:59.000Z

436

2011: Air Quality Regulations Report | Department of Energy  

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

: Air Quality Regulations Report 2011: Air Quality Regulations Report 2011 Air Quality Regulations ReportA120911.pdf More Documents & Publications 2011...

437

HVAC Cabinet Air Leakage Test Method - Building America Top Innovation...  

Energy Savers (EERE)

their air sealing practices to reduce the amount of air leaking at ducts and duct boots, testing showed that distribution systems still leaked at air handlers and furnace...

438

Building America Top Innovations 2014 Profile: HVAC Cabinet Air...  

Energy Savers (EERE)

their air sealing practices to reduce the amount of air leaking at ducts and duct boots, testing showed that distribution systems still leaked at air handlers and furnace...

439

A comparison between two underfloor air distribution (UFAD) design tools  

E-Print Network (OSTI)

TWO UNDERFLOOR AIR DISTRIBUTION (UFAD) DESIGN TOOLS Bin CHENunderfloor air distribution (UFAD) design tools (ASHRAE RP-air distribution (UFAD), Cooling load, Design tool, HVAC

Chen, Bin; Schiavon, Stefano; Bauman, Fred S; Chen, Qingyan

2014-01-01T23:59:59.000Z

440

Fact Sheet: Isothermal Compressed Air Energy Storage (October...  

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

Isothermal Compressed Air Energy Storage (October 2012) Fact Sheet: Isothermal Compressed Air Energy Storage (October 2012) SustainX will demonstrate an isothermal compressed air...

Note: This page contains sample records for the topic "air recirculation delay" 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

Comparing air quality impacts of hydrogen and gasoline  

E-Print Network (OSTI)

Protection Agency, 2006. Air Quality System (AQS). USpathways on urban air quality. International Journal ofchanges in urban air quality. Only primary pollutants

Sperling, Dan; Wang, Guihua; Ogden, Joan M.

2008-01-01T23:59:59.000Z

442

INDOOR AIR QUALITY MEASUREMENTS IN ENERGY EFFICIENT BUILDINGS  

E-Print Network (OSTI)

of Engineering, Coordinating Committee of Air QualityStandards: Air Quality and Automobile Emission Control, Vol.of ilitrogen Dioxide Air Quality Standards. Paper tlo. 76-

Hollowell, C.D.

2011-01-01T23:59:59.000Z

443

Control of Computer Room Air Conditioning using IT Equipment Sensors  

E-Print Network (OSTI)

control routine to adjust setpoints for supply air temperaturecontrol routine to adjust setpoints for supply air temperaturesupply air temperature is provided. The fan-speed control

Bell, Geoffrey C.

2010-01-01T23:59:59.000Z

444

Hybrid and Advanced Air Cooling | Department of Energy  

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

Hybrid and Advanced Air Cooling Hybrid and Advanced Air Cooling Hybrid and Advanced Air Cooling presentation at the April 2013 peer review meeting held in Denver, Colorado....

445

Making Compressed Air System Decisions  

E-Print Network (OSTI)

. Today, modern, high quality manufacturing facilities require a more scientific approach. Many manufacturing processes require strict controls over compressed air pressure, temperature and purity levels. Competitive pressures also force manufacturers...-lubricated cylinder designs. Reciprocating compressor designs remained the standard for industry until the mid 1970s. During the late 1960s and early 1970s, material and manufacturing advances led to the development of 219 Ingersoll-Rand Co. Davidson, N...

Porri, R. E.

446

Mold: An Indoor Air Pollutant  

E-Print Network (OSTI)

threat. Molds are fungi that produce microscopic cells called spores. Mold spores are present everywhere both outdoors and indoors and spread easily through the air. The most common ?problem? mold in indoor environments is Stachybotrys atra (also called S... is kept dry and clean, and efforts are made to reduce the level of mold spores entering the home. Controlling moisture. To control mold for good, you must solve any moisture problems in your home. Because there are mold spores everywhere, and mold grows...

Harris, Janie

2002-07-08T23:59:59.000Z

447

Physiological responses to air pollutants G. Halbwachs  

E-Print Network (OSTI)

Physiological responses to air pollutants G. Halbwachs Zentrum fur Umwelt- und Naturschutz of fumigation experiments on young plants could be utilized for inter- preting some effects when air pollution of the interaction between air pollution and the forest ecosystem, where not only emission stress is at hand

Boyer, Edmond

448

Air Chemistry and Pollution Spring 2014  

E-Print Network (OSTI)

ATOC 3500 Air Chemistry and Pollution Spring 2014 Meeting: T/Th, 12:30 ­ 1:45 am; Duane G1B25 in the news; for example, the quality of the air we breathe directly affects our health. In addition to mitigate the effects of air pollution. Finally, we examine some recent examples of atmospheric chemical

Toohey, Darin W.

449

Scottish Air Pollution and Health Workshop  

E-Print Network (OSTI)

Scottish Air Pollution and Health Workshop Session 4 Joint Research Policy Needs and Interactions needs and how can we work together effectively on these to reduce the adverse effects of air pollution together effectively on these to reduce the adverse effects of air pollution in Scotland. Modelling

450

Strategy Guideline: Compact Air Distribution Systems  

SciTech Connect

This Strategy Guideline discusses the benefits and challenges of using a compact air distribution system to handle the reduced loads and reduced air volume needed to condition the space within an energy efficient home. Traditional systems sized by 'rule of thumb' (i.e., 1 ton of cooling per 400 ft2 of floor space) that 'wash' the exterior walls with conditioned air from floor registers cannot provide appropriate air mixing and moisture removal in low-load homes. A compact air distribution system locates the HVAC equipment centrally with shorter ducts run to interior walls, and ceiling supply outlets throw the air toward the exterior walls along the ceiling plane; alternatively, high sidewall supply outlets throw the air toward the exterior walls. Potential drawbacks include resistance from installing contractors or code officials who are unfamiliar with compact air distribution systems, as well as a lack of availability of low-cost high sidewall or ceiling supply outlets to meet the low air volumes with good throw characteristics. The decision criteria for a compact air distribution system must be determined early in the whole-house design process, considering both supply and return air design. However, careful installation of a compact air distribution system can result in lower material costs from smaller equipment, shorter duct runs, and fewer outlets; increased installation efficiencies, including ease of fitting the system into conditioned space; lower loads on a better balanced HVAC system, and overall improved energy efficiency of the home.

Burdick, A.

2013-06-01T23:59:59.000Z

451

NOAA Air Resources Laboratory Quarterly Activity Report  

E-Print Network (OSTI)

and Hawaii Meteorological Grids for NCEP Atmospheric Turbulence and Diffusion Division 18. Climate 19. Air for Europe convention on Long-Range Transport of Air Pollution. o.russell.bullock@noaa.gov 3. CarbonNOAA Air Resources Laboratory Quarterly Activity Report (January ­ March 2008) Contents Highlights

452

Air Potato Management in Your Backyard  

E-Print Network (OSTI)

Air Potato Management in Your Backyard Ridding your property of air potatoes is no easy task - Collect air potatoes that have fallen to the ground. They may still be attached to dead vines, so pulling the vines down could result in more potatoes falling. SPRING - Look for newly sprouting vines and follow

US Army Corps of Engineers

453

STATE OF CALIFORNIA AIR ECONOMIZER CONTROLS ACCEPTANCE  

E-Print Network (OSTI)

STATE OF CALIFORNIA AIR ECONOMIZER CONTROLS ACCEPTANCE CEC-MECH-5A (Revised 08/09) CALIFORNIA ENERGY COMMISSION CERTIFICATE OF ACCEPTANCE MECH-5A NA7.5.4 Air Economizer Controls Acceptance (Page 1 AIR ECONOMIZER CONTROLS ACCEPTANCE CEC-MECH-5A (Revised 08/09) CALIFORNIA ENERGY COMMISSION

454

Alternative transportation fuels and air quality  

Science Journals Connector (OSTI)

Alternative transportation fuels and air quality ... Potential Air Quality Effects of Using Ethanol?Gasoline Fuel Blends: A Field Study in Albuquerque, New Mexico ... Potential Air Quality Effects of Using Ethanol?Gasoline Fuel Blends: A Field Study in Albuquerque, New Mexico ...

Tai Y. Chang; Robert H. Hammerle; Steven M. Japar; Irving T. Salmeen

1991-07-01T23:59:59.000Z

455

3, 35433588, 2003 3-D air pollution  

E-Print Network (OSTI)

ACPD 3, 3543­3588, 2003 3-D air pollution modelling L. M. Frohn et al. Title Page Abstract hemispheric nested air pollution model L. M. Frohn, J. H. Christensen, J. Brandt, C. Geels, and K. M. Hansen 2003 Correspondence to: L. M. Frohn (lmf@dmu.dk) 3543 #12;ACPD 3, 3543­3588, 2003 3-D air pollution

Boyer, Edmond

456

Air Pollution, ATS555 Colorado State University  

E-Print Network (OSTI)

the basic chemistry of the atmosphere and how it contributes to secondary pollutant formation. 5. Consider/Air Pollution History pp. 1-5 Air Pollution Types, Atmospheric Composition, Concentrations, and Sources pp. 5Air Pollution, ATS555 Colorado State University Fall 2014 Mondays and Wednesdays @ 4:00 ­ 5:30 Room

Collett Jr., Jeffrey L.

457

Air Quality Standards & ATOC/CHEM 5151  

E-Print Network (OSTI)

1 Lecture 22 Air Quality Standards & Control ATOC/CHEM 5151 #12;2 Primary Pollutants Things to reduce air pollution emissions ­ Latest version ­ 1990 (original, 1963) ­ What is an "air pollutant that are directly emitted Nitrogen Oxides (NOx) Hydrocarbons (VOCs) Carbon Monoxide (CO) #12;3 Secondary Pollutants

Toohey, Darin W.

458

Sensitivity of forced air distribution system efficiency to climate, duct location, air leakage and insulation  

E-Print Network (OSTI)

Location, Air Leakage and Insulation Iain S. Walker Energy4 Duct Insulation, Location and Leakageinsulation

Walker, Iain

2001-01-01T23:59:59.000Z

459

Influence of air conditioning management on heat island in Paris air street temperatures  

E-Print Network (OSTI)

Influence of air conditioning management on heat island in Paris air street temperatures Brice 2012 Available online 13 March 2012 Keywords: Air conditioning Heat island mitigation Urban heat island killer'', is exacerbated in urban areas owing to the heat island effect. Air conditioning (A/C) is a key

Ribes, Aurélien

460

Ethylenediamine at Air/Liquid and Air/Silica Interfaces: Protonation  

E-Print Network (OSTI)

surface and EDA protonated products at air/liquid interfaces. The SFG spectra of EDA adsorbedEthylenediamine at Air/Liquid and Air/Silica Interfaces: Protonation Versus Hydrogen BondingKa (HOSit)) is between the two pKa values of EDA (in the range of 7.56-10.71) at the air/silica interface

Note: This page contains sample records for the topic "air recirculation delay" 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

E-Print Network 3.0 - air temperature air Sample Search Results  

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

State University Collection: Mathematics 12 Connectable solar air collectors Solar Energy Centre Denmark Summary: ......

462

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

Science Journals Connector (OSTI)

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

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

2013-01-01T23:59:59.000Z

463

Optimal supply air temperature with respect to energy use in a variable air volume system  

Science Journals Connector (OSTI)

In a variable air volume (VAV) system with 100% outdoor air, the cooling need in the building is satisfied with a certain air flow at a certain supply air temperature. To minimize the system energy use, an optimal supply air temperature can be set dependent on the load, specific fan power (SFP), chiller coefficient of performance, outdoor temperature and the outdoor relative humidity. The theory for an optimal supply air temperature is presented and the heating, ventilation and air-conditioning (HVAC) energy use is calculated depending on supply air temperature control strategy, average U-value of the building envelope and two outdoor climates. The analyses show that controlling the supply air temperature optimally results in a significantly lower HVAC energy use than with a constant supply air temperature. The optimal average U-value of the building envelope is in practise mostly zero.

Fredrik Engdahl; Dennis Johansson

2004-01-01T23:59:59.000Z

464

Meteorological Effects on Air/Fuel Ratio  

E-Print Network (OSTI)

1. "Temperature Compensat d Air/Fuel Ratio Control on a Recuperated Furnace," by J. L. Ferri. GTE Products Corporation, Towanda, PA, lECTC '83 2. Chemical Engineers Handbook, PerTY and Chilton, 5th ed.., (McGraw Hlln, p. 12-7. 3. "Technology..., E = (100 ... 10) (ill) - 100 = 17.2% excess a . 2 Example 2 A furnace uses recuperators which prehe~t the combustion air to 1200 OF using 30 OF air. WithJlOO OF air, the preheated air temperature will be approxIjrnately 1270 OF, a 70 OF increase...

Ferri, J. L.

1984-01-01T23:59:59.000Z

465

Air Sealing Your Home | Department of Energy  

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

Your Home Your Home Air Sealing Your Home November 26, 2013 - 6:22pm Addthis Save on heating and cooling costs by checking for air leaks in common trouble spots in your home. Save on heating and cooling costs by checking for air leaks in common trouble spots in your home. What does this mean for me? Save money and energy by air sealing your house. Caulking and weatherstripping are simple, effective ways of sealing air leaks in your home. Reducing the amount of air that leaks in and out of your home is a cost-effective way to cut heating and cooling costs, improve durability, increase comfort, and create a healthier indoor environment. Caulking and weatherstripping are two simple and effective air-sealing techniques that offer quick returns on investment, often one year or less. Caulk is

466

Air Products Chemicals Inc | Open Energy Information  

Open Energy Info (EERE)

Air Products Chemicals Inc Air Products Chemicals Inc Jump to: navigation, search Name Air Products & Chemicals Inc Place Allentown, Pennsylvania Zip 18195 Sector Hydro, Hydrogen, Services Product A global supplier of merchant hydrogen with a portfolio of products, services and solutions providing gases, performance materials and chemical intermediates. References Air Products & Chemicals Inc[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. Air Products & Chemicals Inc is a company located in Allentown, Pennsylvania . References ↑ "Air Products & Chemicals Inc" Retrieved from "http://en.openei.org/w/index.php?title=Air_Products_Chemicals_Inc&oldid=341937

467

Tips: Air Conditioners | Department of Energy  

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

Tips: Air Conditioners Tips: Air Conditioners Tips: Air Conditioners June 24, 2013 - 6:31pm Addthis Bigger isn't always better for an air conditioner. Learn effective ways to stay cool while saving energy. | Photo courtesy of ©iStockphoto/galinast. Bigger isn't always better for an air conditioner. Learn effective ways to stay cool while saving energy. | Photo courtesy of ©iStockphoto/galinast. Buying a bigger room air conditioner won't necessarily make you feel more comfortable during the hot summer months. In fact, a room air conditioner that's too big for the area it is supposed to cool will perform less efficiently and less effectively than a smaller, properly sized unit. The reason: an oversized unit will cool the room(s) to the thermostat set-point before proper dehumidification occurs, making the area feel "clammy"

468

Clean Air Act | Open Energy Information  

Open Energy Info (EERE)

Clean Air Act Clean Air Act Jump to: navigation, search Statute Name Clean Air Act Year 1970 Url CAA.jpg Description Congress passed the CAA in 1970 in order to combat air pollution in the United States and protect the health and general welfare of United States citizens against air pollutants. References CAA[1] Federal Oil and Gas[2] Contents 1 Introduction 2 Title I Air Pollution Prevention 3 Title II Emission Standards for Moving Sources 4 Title III General Provisions 5 Title IV Acid Deposition Control 6 Title V Permits 7 Title VI Stratospheric Ozone Protection 8 References Introduction The Clean Air Act was enacted by congress in 1990. Since then only minor changes have been made. The act is just a law ensuring that the EPA will follow certain guidelines and definitions for protecting and improving the

469

Industrial Compressed Air System Energy Efficiency Guidebook.  

SciTech Connect

Energy efficient design, operation and maintenance of compressed air systems in industrial plants can provide substantial reductions in electric power and other operational costs. This guidebook will help identify cost effective, energy efficiency opportunities in compressed air system design, re-design, operation and maintenance. The guidebook provides: (1) a broad overview of industrial compressed air systems, (2) methods for estimating compressed air consumption and projected air savings, (3) a description of applicable, generic energy conservation measures, and, (4) a review of some compressed air system demonstration projects that have taken place over the last two years. The primary audience for this guidebook includes plant maintenance supervisors, plant engineers, plant managers and others interested in energy management of industrial compressed air systems.

United States. Bonneville Power Administration.

1993-12-01T23:59:59.000Z

470

Chapter 28 - Air Quality Status and Trends  

Science Journals Connector (OSTI)

Abstract This chapter describes the condition of air quality, based on air pollutant concentrations, i.e. criteria pollutants, in airsheds around the world, as well as certain air toxics in urban areas and hot spots. The variability of pollutant concentrations in space and time are discussed, as well as differences in air pollution between more industrialized and economically developed regions vs developing nations. The status and trends of atmospheric concentrations of tropospheric ozone, oxides of nitrogen, oxides of sulfur, carbon monoxide, lead, and particulate matter are discussed. Examples of air toxics include benzene, polycyclic aromatic hydrocarbons, dioxins, aldehydes, and metals, e.g. mercury. Regional and global trends include acid deposition, depletion of the stratospheric ozone layer, and climate change. Indoor air quality is discussed. The chapter concludes with a description of an air quality index.

Daniel Vallero

2014-01-01T23:59:59.000Z

471

Tips: Air Conditioners | Department of Energy  

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

Tips: Air Conditioners Tips: Air Conditioners Tips: Air Conditioners June 24, 2013 - 6:31pm Addthis Bigger isn't always better for an air conditioner. Learn effective ways to stay cool while saving energy. | Photo courtesy of ©iStockphoto/galinast. Bigger isn't always better for an air conditioner. Learn effective ways to stay cool while saving energy. | Photo courtesy of ©iStockphoto/galinast. Buying a bigger room air conditioner won't necessarily make you feel more comfortable during the hot summer months. In fact, a room air conditioner that's too big for the area it is supposed to cool will perform less efficiently and less effectively than a smaller, properly sized unit. The reason: an oversized unit will cool the room(s) to the thermostat set-point before proper dehumidification occurs, making the area feel "clammy"

472

Predicting Time-Delays under Real-Time Scheduling for Linear Model Predictive Control  

E-Print Network (OSTI)

Predicting Time-Delays under Real-Time Scheduling for Linear Model Predictive Control Zhenwu Shi prediction of time-delays caused by real-time scheduling. Then, a model predictive controller is designed, the interaction between real-time scheduling and control design has received interest in the literature

Zhang, Fumin

473

Time-delayed feedback control of coherence resonance near subcritical Hopf bifurcation: theory versus experiment  

E-Print Network (OSTI)

Using the model of a generalized Van der Pol oscillator in the regime of subcritical Hopf bifurcation we investigate the influence of time delay on noise-induced oscillations. It is shown that for appropriate choices of time delay either suppression or enhancement of coherence resonance can de achieved. Analytical calculations are combined with numerical simulations and experiments on an electronic circuit.

V. Semenov; A. Feoktistov; T. Vadivasova; E. Schöll; A. Zakharova

2014-12-03T23:59:59.000Z

474

System architecture for delay tolerant media distribution for rural south africa  

Science Journals Connector (OSTI)

Wireless communication offers access to information even to users living in areas where little to no access to affordable communication channels is available. Delay Tolerant Networks~(DTNs) enable content distribution in such areas, using mobility of ... Keywords: delay tolerant networks, experimentation, ibr-dtn, measurement, mobile cinemas

Adriano Galati, Theodoros Bourchas, Sandra Siby, Stefan Mangold

2014-09-01T23:59:59.000Z

475

Bilateral Teleoperation of Wheeled Mobile Robot with Time Delay using Virtual Image Robot  

E-Print Network (OSTI)

Bilateral Teleoperation of Wheeled Mobile Robot with Time Delay using Virtual Image Robot Yasunori of wheeled mobile robot with time delay using the virtual image robot. In this paper, we introduce the virtual image robot as a master robot. The human operator commands the virtual image robot, the slave

476

Investigation of the "summation" method for predicting group dependent delayed neutron data  

E-Print Network (OSTI)

The objectives of this thesis were 1) to propose modifications of the ENDF/BVI delayed neutron data, 2) to derive new delayed neutron parameters for groups 1, 2, 3, and 4 using the summation method, and 3) to establish the relative importance...

Angers, Laetitia Genevieve

2012-06-07T23:59:59.000Z

477

A sociability-based routing scheme for delay-tolerant networks  

Science Journals Connector (OSTI)

The problem of choosing the best forwarders in Delay-Tolerant Networks (DTNs) is crucial for minimizing the delay in packet delivery and for keeping the amount of generated traffic under control. In this paper, we introduce sociable routing, a novel ...

Flavio Fabbri; Roberto Verdone

2011-01-01T23:59:59.000Z

478

Optimal Wake-up Scheduling for PSM Delay Minimization in Mobile Wireless Networks  

E-Print Network (OSTI)

-theoretic bound to characterize the minimum average wake-up delay for a maximum threshold on the energy comprising of alternating sleep and wake-up intervals leads to substantial energy conservation in wireless the proposed approach with the existing schemes that improve the delay performance of the standard Binary

Jagannatham, Aditya K.

479

A Graphical Tool to Visualize Predicted Minimum Delay Flights Tanujit Dey, David Phillips, and Patrick Steele  

E-Print Network (OSTI)

destinations from the airports Bal- timore Washington International (BWI) and Dulles International (IAD the predictions of both the minimum-delay and quickest routes for a given origin and destination airport using an airport with the color indicating average delay experienced, and the diameter of each circle representing

Phillips, David

480

Algorithms for correcting geometric distortions in delay line anodes Erik Wilkinsona  

E-Print Network (OSTI)

Algorithms for correcting geometric distortions in delay line anodes Erik Wilkinsona , Steven V, Baltimore, MD 21218 ABSTRACT Time-delay anodes are typically used in conjunction with microchannel plates to provide photon counting and two- dimensional imaging. The anode and associated electronics are used

Colorado at Boulder, University of

Note: This page contains sample records for the topic "air recirculation delay" 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

An Empirical Evaluation of the Student-Net Delay Tolerant Network  

E-Print Network (OSTI)

Lara Department of Computer Science Department of Electrical and Computer Engineering University future it might be possible to build a network that routes delay-tolerant packets by harnessing user potentially reduces device power consumption and radio contention. The design of a user mobility based delay

Goel, Ashvin

482

Physical Design for Reduced Delay Uncertainty in High Performance Clock Distribution Networks  

E-Print Network (OSTI)

531 Physical Design for Reduced Delay Uncertainty in High Performance Clock Distribution Networks, the design of a clock distribution network represents one of the most challenging tasks in the integrated in the design of a high performance clock distribution network [1]. The uncertainty of the clock signal delay

Friedman, Eby G.

483

Energy-Delay Trade-off of Wireless Data Collection in the Plane  

E-Print Network (OSTI)

Energy-Delay Trade-off of Wireless Data Collection in the Plane Mihaela Mitici , Jasper Goseling and the energy needed by the devices to transmit their observations. Fundamental bounds on the energy-delay trade and ii) the transmission energy used by the wireless devices to transmit their observations, which

Boucherie, Richard J.

484

Carbonate fuel cell and components thereof for in-situ delayed addition of carbonate electrolyte  

DOE Patents (OSTI)

An apparatus and method in which a delayed carbonate electrolyte is stored in the storage areas of a non-electrolyte matrix fuel cell component and is of a preselected content so as to obtain a delayed time release of the electrolyte in the storage areas in the operating temperature range of the fuel cell.

Johnsen, Richard (Waterbury, CT); Yuh, Chao-Yi (New Milford, CT); Farooque, Mohammad (Danbury, CT)

2011-05-10T23:59:59.000Z

485

Variable structure control of linear time-delay uncertain singular system  

Science Journals Connector (OSTI)

Synthesis and designing of variable structure controller for time-delay singular uncertain system are studied. Firstly, the system is decomposed into two low dimensional subsystems. Secondly, switching function and variable structure controller are ... Keywords: VSC, controller design, singular systems, switching function, time delay, uncertain systems, variable structure control

Jifeng Guo; Cunchen Gao

2009-04-01T23:59:59.000Z

486

A comparison of various models in predicting ignition delay in single-particle coal combustion  

E-Print Network (OSTI)

A comparison of various models in predicting ignition delay in single-particle coal combustion November 2013 Accepted 7 January 2014 Available online xxxx Keywords: Coal Devolatilization Ignition delay a b s t r a c t In this paper, individual coal particle combustion under laminar conditions

487

1 INTRODUCTION Delayed Ettringite Formation (DEF) and Alkali-Aggregate Reaction (AAR) are both internal  

E-Print Network (OSTI)

1 INTRODUCTION Delayed Ettringite Formation (DEF) and Alkali-Aggregate Reaction (AAR) are both to produce potentially expansive ettringite in the set concrete. AAR may affect concretes cast with aggregate combined delayed ettringite formation and alkali aggregate reaction R.-P. Martin, J.-C. Renaud & F

Paris-Sud XI, Université de

488

ABSORPTION-DELAY MODELS OF HEAT TRANSPORT R.E. SHOWALTER AND D.B. VISARRAGA  

E-Print Network (OSTI)

ABSORPTION-DELAY MODELS OF HEAT TRANSPORT R.E. SHOWALTER AND D.B. VISARRAGA Abstract. A temperature jump in the water traveling through a pipe is delayed by the absorption of heat into the pipe wall transfer, absorption, memory, kinetic models, approximation. 1 #12;2 R.E. SHOWALTER AND D.B. VISARRAGA 1

489

AGN proximity zone fossils and the delayed recombination of metal lines  

Science Journals Connector (OSTI)

......and the delayed recombination of metal lines Benjamin D. Oppenheimer 1 2 Joop Schaye...observed in absorption in quasar sight lines are significantly affected by delayed recombination...intergalactic medium|quasars: absorption lines|cosmology: theory| 1 INTRODUCTION Active......

Benjamin D. Oppenheimer; Joop Schaye

2013-01-01T23:59:59.000Z

490

Radon spectroscopy of packet delay Andre Broido, Ryan King, Evi Nemeth, kc claffy  

E-Print Network (OSTI)

techniques, specifically the Radon transform previously applied in geophysics [6] and computer tomography [7 the feasibility of Internet spectroscopy techniques for analysis of rate limiting, packet interarrival delay packet trace data, we find that delay's quantization in micro- and millisecond range is ubiquitous

California at San Diego, University of

491

Communication Delays in Wide Area Measurement Systems Biju Naduvathuparambil, Matthew C. Valenti, and Ali Feliachi  

E-Print Network (OSTI)

the IEEE 1344 data format used by the PMU. Communication issues and related communication link delay to the propagation delay of the particular link, the message for- mat of the PMU and data rate of the link determine size of the DFT. PMU PMU PMUPMU PHASOR DATA CONCENTRATOR APPLICATION SOFTWARE SYSTEM PROTECTION CENTER

Valenti, Matthew C.

492

Time delay of light signals in an energy-dependent spacetime metric  

E-Print Network (OSTI)

In this note we review the problem of time delay of photons propagating in a spacetime with a metric that explicitly depends on the energy of the particles (Gravity-Rainbow approach). We show that corrections due to this approach -- which is closely related to DSR proposal -- produce for small redshifts ($z<<1$) smaller time delays than in the generic Lorentz Invariance Violating case.

A. F. Grillo; E. Luzio; F. Mendez

2008-08-16T23:59:59.000Z

493

Indoor Air Quality Forms 195 Building: _________________________________________________________ File Number: ________________________________  

E-Print Network (OSTI)

acceptable? Seal when closed? #12;Indoor Air Quality Forms 196 BuildingIndoor Air Quality Forms 195 Building in relation to indoor air quality. Page 1 of 14 Needs Attention Not ApplicableOKComponent Comments Outside Air

494

Model sensitivity and uncertainty analysis using roadside air quality measurements  

E-Print Network (OSTI)

Model sensitivity and uncertainty analysis using roadside air quality measurements Sotiris, a probabilistic methodology for assessing urban air quality was proposed. Keywords: Air pollution; Model 535265 1. Introduction Mathematical modelling has been widely used for assessing ambient air quality

Paris-Sud XI, Université de

495

Nuclear Safety Management, Final Rule; Delay of Effective Date (66 FR  

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

Nuclear Safety Management, Final Rule; Delay of Effective Date (66 Nuclear Safety Management, Final Rule; Delay of Effective Date (66 FR 8746), Fed Reg, 2/2/01 Nuclear Safety Management, Final Rule; Delay of Effective Date (66 FR 8746), Fed Reg, 2/2/01 Nuclear Safety Management, Final Rule; Delay of Effective Date (66 FR 8746), Fed Reg, 2/2/01 In accordance with the memorandum of January 20, 2001, from the Assistant to the President and Chief of Staff, entitled ''Regulatory Review Plan,'' published in the Federal Register on January 24, 2001 (66 FR 7702), this action temporarily delays for 60 days the effective date of the rule entitled ''Alternate Fuel Transportation Program; Biodiesel Fuel Use Credit'' published in the Federal Register on January 11, 2001 (66 FR 2207). DATES: The effective date of the rule amending 10 CFR part 490

496

Control of Computer Room Air Conditioning using IT Equipment Sensors  

E-Print Network (OSTI)

8 Figure 5 Server rack Inlet Air Temperature (8 Figure 6 Server-rack Leaving Air Temperature (Rack .

Bell, Geoffrey C.

2010-01-01T23:59:59.000Z

497

Laser Noise Reduction in Air  

E-Print Network (OSTI)

Fluctuations of the white-light supercontinuum produced by ultrashort laser pulses in selfguided filaments (spatio-temporal solitons) in air are investigated. We demonstrate that correlations exist within the white-light supercontinuum, and that they can be used to significantly reduce the laser intensity noise by filtering the spectrum. More precisely, the fundamental wavelength is anticorrelated with the wings of the continuum, while conjugated wavelength pairs on both sides of the continuum are strongly correlated. Spectral filtering of the continuum reduces the laser intensity noise by 1.2 dB, showing that fluctuations are rejected to the edges of the spectrum.

Pierre Bejot; Jerome Kasparian; Estelle Salmon; Roland Ackermann; Nicolas Gisin; Jean-Pierre Wolf

2006-08-09T23:59:59.000Z

498

Sonoluminescing air bubbles rectify argon  

E-Print Network (OSTI)

The dynamics of single bubble sonoluminescence (SBSL) strongly depends on the percentage of inert gas within the bubble. We propose a theory for this dependence, based on a combination of principles from sonochemistry and hydrodynamic stability. The nitrogen and oxygen dissociation and subsequent reaction to water soluble gases implies that strongly forced air bubbles eventually consist of pure argon. Thus it is the partial argon (or any other inert gas) pressure which is relevant for stability. The theory provides quantitative explanations for many aspects of SBSL.

Detlef Lohse; Michael P. Brenner; Todd F. Dupont; Sascha Hilgenfeldt; Blaine Johnston

1996-05-07T23:59:59.000Z

499

Thermal comfort and cold air distribution  

SciTech Connect

Cold air distribution systems supply air at temperatures between 38 F and 51 F. Cold air distribution systems are increasingly attractive when used in conjunction with ice storage systems to shave peak load by shifting the demand to off-peak hours. They also require less operating and capital costs because they use smaller fans, ducts, piping, and pumps. However, an important issue in design and application of cold air systems is the effect on occupant comfort. There are several techniques and methodologies that practitioners use for evaluation of conventional air distribution systems. Among these is the Air Diffusion Performance Index (ADPI). It is widely used in the US and is referenced in the 1993 ASHRAE Handbook--Fundamentals. However, this technique is based on empirical correlations obtained from tests conducted with conventional systems and it cannot be guaranteed that they will be equally applicable to cold air systems. This study was undertaken, therefore, to extend the existing techniques (especially the Air Diffusion Performance Index) to applications where cold air distribution systems are utilized. This work presents a critical review of the evolution of the ADPI technique and offers several recommendations for developing a firm foundation for future room air distribution research.

Hassani, V. [National Renewable Energy Lab., Golden, CO (United States); Miller, P.L. [Miller (Paul), Arvada, CO (United States)

1998-10-01T23:59:59.000Z

500

Ambient Operation of Li/Air Batteries  

SciTech Connect

In this work, Li/air batteries based on nonaqueous electrolytes were investigated in ambient conditions (with an oxygen partial pressure of 0.21 atm and relative humidity of ~20%). A heat-sealable polymer membrane was used as both an oxygen-diffusion membrane and as a moisture barrier for Li/air batteries. The membrane also can minimize the evaporation of the electrolyte from the batteries. Li/air batteries with this membrane can operate in ambient conditions for more than one month with a specific energy of 362 Wh kg-1, based on the total weight of the battery including its packaging. Among various carbon sources used in this work, Li/air batteries using Ketjenblack (KB) carbon-based air electrodes exhibited the highest specific energy. However, KB-based air electrodes expanded significantly and absorbed much more electrolyte than electrodes made from other carbon sources. The weight distribution of a typical Li/air battery using the KB-based air electrode was dominated by the electrolyte (~70%). Lithium-metal anodes and KB-carbon anodes account for only 5.12% and 5.78% of the battery weight, respectively. We also found that only ~ 20% of the mesopore volume of the air electrode was occupied by reaction products after discharge. To further improve the specific energy of the Li/air batteries, the microstructure of the carbon electrode needs to be further improved to absorb much less electrolyte while still holding significant amounts of reaction products

Zhang, Jiguang; Wang, Deyu; Xu, Wu; Xiao, Jie; Williford, Ralph E.

2010-07-01T23:59:59.000Z