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1

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.

Zn Farkas

2011-03-11T23:59:59.000Z

2

Improving Baked Anode Density and Air Permeability Through ...  

Science Conference Proceedings (OSTI)

Presentation Title, Improving Baked Anode Density and Air Permeability Through Process Optimization and Coke Blending. Author(s), Bienvenu Ndjom,...

3

Relationship between AirSea Density Flux and Isopycnal Meridional Overturning Circulation in a Warming Climate  

Science Conference Proceedings (OSTI)

This study aims to explore the relationship between airsea density flux and isopycnal meridional overturning circulation (MOC), using the Intergovernmental Panel on Climate Change (IPCC) Fourth Assessment Report (AR4) model projections of the ...

MyeongHee Han; Igor Kamenkovich; Timour Radko; William E. Johns

2013-04-01T23:59:59.000Z

4

Change-over valve for air suspension  

Science Conference Proceedings (OSTI)

A change-over valve is described for an air suspension interposed between a main air chamber formed to surround a shock absorber provided with a piston rod and an auxiliary air chamber, comprising: a valve base having a first hole through which the piston rod extends and a second hole into which a valve body is inserted; the valve body disposed in the second hole; a holder disposed in the second hole; and means removably fixed to the piston rod extending through the first hole to connect the piston rod with the valve base while preventing the holder from falling out.

Buma, S.

1987-04-28T23:59:59.000Z

5

Density Changes in the Optimized CSSX Solvent System  

Science Conference Proceedings (OSTI)

Density increases in caustic-side solvent extraction (CSSX) solvent have been observed in separate experimental programs performed by different groups of researchers. Such changes indicate a change in chemical composition. Increased density adversely affects separation of solvent from denser aqueous solutions present in the CSSX process. Identification and control of factors affecting solvent density are essential for design and operation of the centrifugal contactors. The goals of this research were to identify the factors affecting solvent density (composition) and to develop correlations between easily measured solvent properties (density and viscosity) and the chemical composition of the solvent, which will permit real-time determination and adjustment of the solvent composition. In evaporation experiments, virgin solvent was subjected to evaporation under quiescent conditions at 25, 35, and 45 C with continuously flowing dry air passing over the surface of the solvent. Density and viscosity were measured periodically, and chemical analysis was performed on the solvent samples. Chemical interaction tests were completed to determine if any chemical reaction takes place over extended contact time that changes the composition and/or physical properties. Solvent and simulant, solvent and strip solution, and solvent and wash solution were contacted continuously in agitated flasks. They were periodically sampled and the density measured (viscosity was also measured on some samples) and then submitted to the Chemical Sciences Division of Oak Ridge National Laboratory for analysis by nuclear magnetic resonance (NMR) spectrometry and high-performance liquid chromatography (HPLC) using the virgin solvent as the baseline. Chemical interaction tests showed that solvent densities and viscosities did not change appreciably during contact with simulant, strip, or wash solution. No effects on density and viscosity and no chemical changes in the solvent were noted within experimental limits. Evaporation test results showed that all solvents were evaporated to densities of greater than 0.90 g/cm{sup 3}. Viscosities increased from 3.5 to >6.5 cP as the densities increased. NMR and HPLC data indicate that diluent loss is the primary reason for density increase and that the ratio of BOBCalixC6 (referred to as calix) to Cs-7SB remained almost constant. Density and viscosity vary linearly with the loss of diluent and the increase in Cs-7SB concentration. Solvent viscosity and density are both sensitive indicators of the loss of diluent, especially when such loss is greater than 10%. However, density is more reliable at low values for diluent loss. The ratio of Cs-7SB to calix appears relatively constant during evaporation to losses of more than 50% of the diluent. A simple density model accurately predicts the composition of the solvent when density is known. Density and viscosity increases can affect the throughput in the centrifugal contactors and, at the extreme, can cause complete loss of flow. The distribution coefficient can also increase, especially in the strip stage, causing the loss of the ability to strip extracted cesium from the solvent. These effects can be addressed by internal changes to the contactor and by adding additional stripping stages in processing. However, these changes are extremely difficult under remote operation and maintenance restrictions.

Lee, D.D.

2002-11-25T23:59:59.000Z

6

File:Air Density Lab.pdf | Open Energy Information  

Open Energy Info (EERE)

Air Density Lab.pdf Air Density Lab.pdf Jump to: navigation, search File File history File usage Metadata File:Air Density Lab.pdf Size of this preview: 463 × 599 pixels. Other resolution: 464 × 600 pixels. Go to page 1 2 3 4 Go! next page → next page → Full resolution ‎(1,275 × 1,650 pixels, file size: 240 KB, MIME type: application/pdf, 4 pages) File history Click on a date/time to view the file as it appeared at that time. Date/Time Thumbnail Dimensions User Comment current 09:36, 3 January 2014 Thumbnail for version as of 09:36, 3 January 2014 1,275 × 1,650, 4 pages (240 KB) Foteri (Talk | contribs) Category:Wind for Schools Portal CurriculaCategory:Wind for Schools High School Curricula You cannot overwrite this file. Edit this file using an external application (See the setup

7

Cerenkov Photon Density Fluctuations in Extensive Air Showers  

E-Print Network (OSTI)

The details of Cerenkov light produced by a gamma ray or a cosmic ray incident at the top of the atmosphere is best studied through systematic simulations of the extensive air showers. Recently such studies have become all the more important in view of the various techniques resulting from such studies, to distinguish gamma ray initiated showers from those generated by much more abundant hadronic component of cosmic rays. We have carried out here such systematic simulation studies using CORSIKA package in order to understand the Cerenkov photon density fluctuations for 5 different energies at various core distances both for gamma ray and proton primaries incident vertically at the top of the atmosphere. Such a systematic comparison of shower to shower density fluctuations for gamma ray and proton primaries is carried out for the first time here. It is found that the density fluctuations are significantly non-Poissonian. Such fluctuations are much more pronounced in the proton primaries than gamma ray primaries at all energies. The processes that contribute significantly to the observed fluctuations have been identified. It has been found that significant contribution to fluctuations comes from photons emitted after shower maximum. The electron number fluctuations and correlated emission of Cerenkov photons are mainly responsible for the observed fluctuations.

V. R. Chitnis; P. N. Bhat

1998-02-14T23:59:59.000Z

8

Climate change impact assessment of air pollution levels in bulgaria  

Science Conference Proceedings (OSTI)

The presented work is aiming at climate change impacts and vulnerability assessment in Bulgaria Climate change may affect exposures to air pollutants by affecting weather and thereby local and regional pollution concentrations Local weather patterns ...

D. Syrakov; M. Prodanova; N. Miloshev; K. Ganev; G. Jordanov; V. Spiridonov; A. Bogatchev; E. Katragkou; D. Melas; A. Poupkou; K. Markakis

2009-06-01T23:59:59.000Z

9

Revised formula for the density of moist air (CIPM-2007)  

Science Conference Proceedings (OSTI)

... using air buoyancy artefacts Metrologia 41 3302 [6] Kobayashi Y, Nezu Y, Uchikawa K, Ikeda S and Yano H 1986 Prototype kilogram balance II of ...

2013-06-21T23:59:59.000Z

10

Historical Atmospheric Transmission Changes and Changes in Midwestern Air Pollution  

Science Conference Proceedings (OSTI)

Measurements of haze, smoke, dust, and visibility in the midwest available from 1901 to 1980 reveal sizable temporal fluctuations. These appear useful as surrogates of air pollutants not measured before 1950. Their historical record reflects both ...

Stanley A. Changnon

1987-05-01T23:59:59.000Z

11

The Theoreticians CloudsHeavier or Lighter than Air? On Densities in Atmospheric Thermodynamics  

Science Conference Proceedings (OSTI)

Threefold densities may be introduced into atmospheric thermodynamics. For rainless clouds the general indirect or implicit conclusion is that they are denser than moist air under the same circumstances, although in a classic treatise a different ...

Joachim Pelkowski; Thomas Frisius

2011-10-01T23:59:59.000Z

12

Health Relevant Outdoor Air Change Rates in Homes  

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

Health Relevant Outdoor Air Change Rates in Homes Health Relevant Outdoor Air Change Rates in Homes Speaker(s): Jan Sundell Date: February 6, 2003 - 12:00pm Location: Bldg. 90 The Damp Building and Health (DBH) study started as a cross-sectional questionnaire study of all 14000 children, 1-6 years of age in Värmland, Sweden. The response rate on the questionnaire (year 2001) was 79%, meaning that basic data exists on almost 12,000 children and their homes. In a second step a case-control study on 200 sick (wheezing, asthma, excema), and 200 healthy children, extensive measurements in the home, as well as clinical examinations of the children has been conducted during 2002. Ventilation has been measured with a passive tracer gas method during one week. The results will be presented in this seminar-- seemingly sick

13

Development of Refrigerant Change Indicator and Dirty Air Filter Sensor  

Science Conference Proceedings (OSTI)

The most common problems affecting residential and light commercial heating, ventilation, and air-conditioning (HVAC) systems are slow refrigerant leaks and dirty air filters. Equipment users are usually not aware of a problem until most of the refrigerant has escaped or the air filter is clogged with dirt. While a dirty air filter can be detected with a technology based on the air pressure differential across the filter, such as a ''whistling'' indicator, it is not easy to incorporate this technology into existing HVAC diagnostic equipment. Oak Ridge National Laboratory is developing a low-cost, nonintrusive refrigerant charge indicator and dirty air filter detection sensor. The sensors, based on temperature measurements, will be inexpensive and easy to incorporate into existing heat pumps and air conditioners. The refrigerant charge indicator is based on the fact that when refrigerant starts to leak, the evaporator coil temperature starts to drop and the level of liquid subcooling drops. When the coil temperature or liquid subcooling drops below a preset reading, a signal, such as a yellow warning light, can be activated to warn the equipment user that the system is undercharged. A further drop of coil temperature or liquid subcooling below another preset reading would trigger a second warning signal, such as a red warning light, to warn the equipment user that the unit now detects a leak and immediate action should be taken. The warning light cannot be turned off until it is re-set by a refrigeration repairman. To detect clogged air filters, two additional temperature sensors can be applied, one each across the evaporator. When the air filter is accumulating buildup, the temperature differential across the evaporator will increase because of the reduced airflow. When the temperature differential reaches a pre-set reading, a signal will be sent to the equipment user that the air filter needs to be changed. A traditional refrigerant charge indicator requires intrusion into the system to measure the refrigerant high-side and low-side pressures. Once the pressures are known, based on the equipment's refrigerant charging chart? or in most cases, based on the technician's experience? the refrigerant charging status is determined. However, there is a catch: by the time a refrigeration technician is called, most of the refrigerant has already escaped into the atmosphere. The new technology provides a real-time warning so that when, say, 20% of the refrigerant has leaked, the equipment users will be warned, even though the equipment is still functioning properly at rated capacity. Temperature sensors are becoming very accurate and very low in cost, compared with pressure sensors. Using temperature sensors to detect refrigerant charge status is inherently nonintrusive, inexpensive, and accurate. With the addition of two temperature sensors for detecting dirty air filters, the capability of the diagnostic equipment is further enhanced with very little added cost. This report provides laboratory test data on the change of indoor coil refrigerant temperature and subcooling as a function of refrigerant charge for a 2-ton split heat pump system. The data can be used in designing the indicators for refrigerant loss and dirty air filter sensors.

Mei, V.

2003-06-24T23:59:59.000Z

14

Lung Density Changes After Stereotactic Radiotherapy: A Quantitative Analysis in 50 Patients  

Science Conference Proceedings (OSTI)

Purpose: Radiologic lung density changes are observed in more than 50% of patients after stereotactic body radiotherapy (SBRT) for lung cancer. We studied the relationship between SBRT dose and posttreatment computed tomography (CT) density changes, a surrogate for lung injury. Methods and Materials: The SBRT fractionation schemes used to treat Stage I lung cancer with RapidArc were three fractions of 18 Gy, five fractions of 11 Gy, or eight fractions of 7.5 Gy, prescribed at the 80% isodose. Follow-up CT scans performed at less than 6 months (n = 50) and between 6 and 9 months (n = 30) after SBRT were reviewed. Posttreatment scans were coregistered with baseline scans using a B-spline deformable registration algorithm. Voxel-Hounsfield unit histograms were created for doses between 0.5 and 50 Gy. Linear mixed effects models were used to assess the effects of SBRT dose on CT density, and the influence of possible confounders was tested. Results: Increased CT density was associated with higher dose, increasing planning target volume size, and increasing time after SBRT (all p 6 Gy, were most prominent in areas receiving >20 Gy, and seemed to plateau above 40 Gy. In regions receiving >36 Gy, the reduction in air-filled fraction of lung after treatment was up to 18%. No increase in CT density was observed in the contralateral lung receiving {>=}3 Gy. Conclusions: A dose-response relationship exists for quantitative CT density changes after SBRT. A threshold of effect is seen at low doses, and a plateau at highest doses.

Palma, David A., E-mail: david.palma@uwo.ca [Department of Radiation Oncology, VU University Medical Center, Amsterdam (Netherlands); Soernsen de Koste, John van; Verbakel, Wilko F.A.R. [Department of Radiation Oncology, VU University Medical Center, Amsterdam (Netherlands); Vincent, Andrew [Department of Biometrics, Netherlands Cancer Institute, Amsterdam (Netherlands); Senan, Suresh [Department of Radiation Oncology, VU University Medical Center, Amsterdam (Netherlands)

2011-11-15T23:59:59.000Z

15

Density and Tensile Properties Changed by Aging Plutonium  

Science Conference Proceedings (OSTI)

We present volume, density, and tensile property change observed from both naturally and accelerated aged plutonium alloys. Accelerated alloys are plutonium alloys with a fraction of Pu-238 to accelerate the aging process by approximately 18 times the rate of unaged weapons-grade plutonium. After thirty-five equivalent years of aging on accelerated alloys, the dilatometry shows the samples at 35 C have swelled in volume by 0.12 to 0.14% and now exhibit a near linear volume increase due to helium in-growth while showing possible surface effects on samples at 50 C and 65 C. The engineering stress of the accelerated alloy at 18 equivalent years increased significantly compared to at 4.5 equivalent years.

Chung, B W; Choi, B W; Thompson, S R; Woods, C H; Hopkins, D J; Ebbinghaus, B B

2005-03-14T23:59:59.000Z

16

High density phase change data on flexible substrates by thermal curing type nanoimprint lithography  

Science Conference Proceedings (OSTI)

In this study, high density phase change nano-pillar device (Tera-bit per inch^2 data density) was fabricated on flexible substrates by thermal curing type nanoimprint lithography with high throughput at a relatively low temperature (120^oC). Phase change ... Keywords: Flexible nano-device, Nanoimprint lithography, Phase change memory, Phase change nano-pillar device, Tera-bit record

Sung-Hoon Hong; Jun-Ho Jeong; Kang-In Kim; Heon Lee

2011-08-01T23:59:59.000Z

17

Program on Technology Innovation: Interactions of Climate Change and Air Quality: Research Priorities and New Direction  

Science Conference Proceedings (OSTI)

Regional air quality and global climate change are highly interrelated because emissions of many pollutants affect both air quality and climate change, and the fundamental chemistry affecting air quality and global climate is similar. There are major gaps in scientific understanding that limit the development of models that can be used to accurately assess impacts of the interactions between air quality and climate on global to regional scales. A two-day workshop was held to identify such gaps and develo...

2005-08-09T23:59:59.000Z

18

Energy Solutions to Air Pollution and Climate Change in California  

Science Conference Proceedings (OSTI)

Wind, solar, hydro, and geothermal power can be combined for baseload or load-matching power supply, particularly in combination with plug-in electric vehicles. California and the U.S. have significant wind resources. California's offshore resources were quantified. Interconnecting wind farms can convert about 1/3 of intermittent power to power with the same reliability as a coal-fired power plant. Wind-battery electric vehicles could reduce U.S. CO2 by 25.5%; solar-battery electric vehicles can reduce it by 23.4%. Corn-ethanol vehicles cannot practically reduce CO2 in the U.S. by more than 0.07-0.2%. Battery electric and hydrogen-fuel cell vehicles powered by renewable sources will eliminate 10,000-20,000 U.S. air pollution deaths each year. Ethanol vehicles will increase the death rate or cause no change. Wind turbines require 30 times less land than corn ethanol and 20 times less land than cellulosic ethanol for the same power.

Jacobson, M.Z.; Dvorak, M.; Archer, C.L.; Hoste, G. [Stanford Univ., CA (United States). Dept. of Civil & Environmental Engineering

2007-07-01T23:59:59.000Z

19

Generation of concentration density maxima of small dispersive coal dust particles in horizontal iodine air filter at air-dust aerosol blow  

E-Print Network (OSTI)

The spatial distributions of the small dispersive coal dust particles with the nano and micro sizes in the granular filtering medium with the cylindrical coal granules in the absorber in the horizontal iodine air filter during its long term operation at the nuclear power plant are researched. It is shown that the concentration density maxima of the small dispersive coal dust particles appear in the granular filtering medium with the cylindrical coal absorbent granules in the horizontal iodine air filter at an action by the air dust aerosol blow. The comparison of the measured aerodynamic resistances of the horizontal and vertical iodine air filters is conducted. The main conclusion is that the magnitude of the aerodynamic resistance of the horizontal iodine air filters is much smaller in comparison with the magnitude of the aerodynamic resistance of the vertical iodine air filters at the same loads of the air dust aerosol volumes. It is explained that the direction of the air dust aerosol blow and the direction of the gravitation force in the horizontal iodine air filter are orthogonal, hence the effective accumulation of the small dispersive coal dust particles takes place at the bottom of absorber in the horizontal iodine air filter. It is found that the air dust aerosol stream flow in the horizontal iodine air filter is not limited by the appearing structures, made of the precipitated small dispersive coal dust particles, in distinction from the vertical iodine air filter, in the process of long term operation of the iodine air filters at the nuclear power plant.

I. M. Neklyudov; O. P. Ledenyov; L. I. Fedorova; P. Ya. Poltinin

2013-06-11T23:59:59.000Z

20

Dynamic Control of Lab Air Change Rates using Multiplexed IEQ...  

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

commissioning. This presentation discusses a new type of real time, multiplexed facility monitoring technology. Packets of air and data are routed through a unique, hollow...

Note: This page contains sample records for the topic "air density change" 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

Generation of concentration density maxima of small dispersive coal dust particles in horizontal iodine air filter at air-dust aerosol blow  

E-Print Network (OSTI)

The spatial distributions of the small dispersive coal dust particles with the nano and micro sizes in the granular filtering medium with the cylindrical coal granules in the absorber in the horizontal iodine air filter during its long term operation at the nuclear power plant are researched. It is shown that the concentration density maxima of the small dispersive coal dust particles appear in the granular filtering medium with the cylindrical coal absorbent granules in the horizontal iodine air filter at an action by the air dust aerosol blow. The comparison of the measured aerodynamic resistances of the horizontal and vertical iodine air filters is conducted. The main conclusion is that the magnitude of the aerodynamic resistance of the horizontal iodine air filters is much smaller in comparison with the magnitude of the aerodynamic resistance of the vertical iodine air filters at the same loads of the air dust aerosol volumes. It is explained that the direction of the air dust aerosol blow and the directi...

Neklyudov, I M; Fedorova, L I; Poltinin, P Ya

2013-01-01T23:59:59.000Z

22

CO2/oxalate Cathodes as Safe and Efficient Alternatives in High Energy Density Metal-Air Type Rechargeable Batteries  

E-Print Network (OSTI)

We present theoretical analysis on why and how rechargeable metal-air type batteries can be made significantly safer and more practical by utilizing CO2/oxalate conversions instead of O2/peroxide or O2/hydroxide ones, in the positive electrode. Metal-air batteries, such as the Li-air one, may have very large energy densities, comparable to that of gasoline, theoretically allowing for long range all-electric vehicles. There are, however, still significant challenges, especially related to the safety of their underlying chemistries, the robustness of their recharging and the need of supplying high purity O2 from air to the battery. We point out that the CO2/oxalate reversible electrochemical conversion is a viable alternative of the O2-based ones, allowing for similarly high energy density and almost identical voltage, while being much safer through the elimination of aggressive oxidant peroxides and the use of thermally stable, non-oxidative and environmentally benign oxalates instead.

Nemeth, Karoly

2013-01-01T23:59:59.000Z

23

Research on Factors Relating to Density and Climate Change | Open Energy  

Open Energy Info (EERE)

Research on Factors Relating to Density and Climate Change Research on Factors Relating to Density and Climate Change Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Research on Factors Relating to Density and Climate Change Agency/Company /Organization: National Association of Home Builders Focus Area: Multi-sector Impact Evaluation Topics: Policy Impacts Resource Type: Reports, Journal Articles, & Tools Website: www.nahb.org/fileUpload_details.aspx?contentID=139993 This document talks about the increase residential density, primarily on the grounds that it will reduce vehicle miles traveled,a measure that is closely related to the GHG emissions from driving. References Retrieved from "http://en.openei.org/w/index.php?title=Research_on_Factors_Relating_to_Density_and_Climate_Change&oldid=515031"

24

Considering Climate Change in U.S. Air Quality Management  

SciTech Connect

Despite the challenges in linking global and regional processes, evidence from recent studies suggests that the effects of a changing climate should not be neglected when planning for the future attainment of regional-scale ozone standards such as the U.S. NAAQS. Research underway should provide insight regarding the impact of climate change on Ozone and PM2.5 and of the complex interaction of climate, land-use, and technology change.

Hogrefe, C.; Leung, Lai R.; Mickley, L. J.; Hunt, Sherri W.; Winner, D. A.

2005-10-01T23:59:59.000Z

25

DENSITY  

Science Conference Proceedings (OSTI)

... Table 2: Principal mineral phases found in the granite rock. Mineral phase. ... Table 4. Average density of 12 granite rocks by Archimedes and CT. ...

2007-01-08T23:59:59.000Z

26

Temporal Changes in the Observed Relationship between Cloud Cover and Surface Air Temperature  

Science Conference Proceedings (OSTI)

The relationship between cloud cover and near-surface air temperature and its decadal changes are examined using the hourly synoptic data for the past four to six decades from five regions of the Northern Hemisphere: Canada, the United States, ...

Bomin Sun; Pavel Ya Groisman; Raymond S. Bradley; Frank T. Keimig

2000-12-01T23:59:59.000Z

27

Hourly Rainfall Changes in Response to Surface Air Temperature over Eastern Contiguous China  

Science Conference Proceedings (OSTI)

In this study, late-summer rainfall over eastern contiguous China is classified according to hourly intensity and the changes of moderate, intense, and extreme precipitation in response to variation of surface air temperature are analyzed. The e-...

Rucong Yu; Jian Li

2012-10-01T23:59:59.000Z

28

Radiated energy and impurity density changes during intensive hydrogen influx in the PLT tokamak  

DOE Green Energy (OSTI)

During a discharge a puff of hydrogen is admitted, sufficient to more than triple the plasma density, and the resulting changes in various plasma parameters are determined. The absolute densities of various wall and limiter (carbon) materials are found to decrease by a substantial fraction, probably as a result of lowered peripheral temperature. The radiation pattern deduced from spectroscopically determined plasma composition is in good quantitative agreement with direct bolometric measurements. In the interior of the discharge radiation constitutes only a small part of the power input. Neither the radiated power nor the power input changes very markedly as a result of the density rise, since the effects of temperature and plasma composition changes tend to compensate each other.

Hinnov, E.; Hosea, J.; Hsuan, H.; Jobes, F.; Meservey, E.; Schmidt, G.; Suckewer, S.

1981-12-01T23:59:59.000Z

29

EIA - AEO2010 - Clean Air Interstate Rule: Changes and modeling in AEO2010  

Gasoline and Diesel Fuel Update (EIA)

Clean Air Interstate Rule: Changes and modeling in AEO2010 Clean Air Interstate Rule: Changes and modeling in AEO2010 Annual Energy Outlook 2010 with Projections to 2035 Clean Air Interstate Rule: Changes and modeling in AEO2010 On December 23, 2008, the D.C. Circuit Court remanded but did not vacate CAIR [17], overriding its previous decision on February 8, 2008, to remand and vacate CAIR. The December decision, which is reflected in AEO2010, allows CAIR to remain in effect, providing time for the EPA to modify the rule in order to address objections raised by the Court in its earlier decision. A similar rule, referred to as the CAMR, which was to set up a cap-and-trade system for reducing mercury emissions by approximately 70 percent, is not represented in the AEO2010 projections, because it was vacated by the D.C. Circuit Court in February 2008.

30

Research on Thermal Properties in a Phase Change Wallboard Room Based on Air Conditioning Cold Storage  

E-Print Network (OSTI)

After comparing the thermal performance parameters of an ordinary wall room to a phase change wall (PCW) room, we learn that phase change wallboard affects the fluctuation of temperature in air-conditioning room in the summer. We built a PCW room and an ordinary wall room, which are cooled by an air-conditioner. We used differential scanning calorimetry (DSC) to test the temperature field and heat flow fluctuation in these rooms. Through analyzing the data tested, we found that the mean temperature of PCW is lower than that of ordinary wall room by 1 to 2?, and PCW can lower the heat flow by 4.6W/m2. Combining phase change material with the building envelope can lower the indoor temperature, make the room thermally comfortable, and cut down the turn-on-and-off frequency of the air-conditioner and the primary investment and operating costs. It alleviates the urgent need for electricity.

Feng, G.; Li, W.; Chen, X.

2006-01-01T23:59:59.000Z

31

NO FLARES FROM GAMMA-RAY BURST AFTERGLOW BLAST WAVES ENCOUNTERING SUDDEN CIRCUMBURST DENSITY CHANGE  

Science Conference Proceedings (OSTI)

Afterglows of gamma-ray bursts are observed to produce light curves with the flux following power-law evolution in time. However, recent observations reveal bright flares at times on the order of minutes to days. One proposed explanation for these flares is the interaction of a relativistic blast wave with a circumburst density transition. In this paper, we model this type of interaction computationally in one and two dimensions, using a relativistic hydrodynamics code with adaptive mesh refinement called RAM, and analytically in one dimension. We simulate a blast wave traveling in a stellar wind environment that encounters a sudden change in density, followed by a homogeneous medium, and compute the observed radiation using a synchrotron model. We show that flares are not observable for an encounter with a sudden density increase, such as a wind termination shock, nor for an encounter with a sudden density decrease. Furthermore, by extending our analysis to two dimensions, we are able to resolve the spreading, collimation, and edge effects of the blast wave as it encounters the change in circumburst medium. In all cases considered in this paper, we find that a flare will not be observed for any of the density changes studied.

Gat, Ilana; Van Eerten, Hendrik; MacFadyen, Andrew [Center for Cosmology and Particle Physics, Physics Department, New York University, New York, NY 10003 (United States)

2013-08-10T23:59:59.000Z

32

Analysis of Density Changes in Plutonium Observed from Accelerated Aging Using Pu-238 Enrichment  

Science Conference Proceedings (OSTI)

We present dimensional and density changes in an aging plutonium alloy enriched with 7.3 at.% of {sup 238}Pu and reference alloys of various ages. After 45 equivalent years of aging, the enriched alloys at 35 C have swelled in volume by 0.14 to 0.16% and now exhibit a near linear volume increase, without void swelling. Based on X-ray diffraction measurements, the lattice expansion by self-irradiation appears to be the primary cause for dimensional changes during the initial 2-3 years of aging. Following the initial transient, the density change is primarily cause by a constant helium in-growth rate as a result of {alpha}-particle decay.

Chung, B W; Saw, C K; Thompson, S R; Quick, T M; Woods, C H; Hopkins, D J; Ebbinghaus, B B

2006-07-11T23:59:59.000Z

33

The use of electrochemical sensors for monitoring urban air quality in low-cost, high-density networks.  

E-Print Network (OSTI)

electrolyte reservoirs for increased long-term baseline stability, and larger integral batteries allowing operation for in excess of 3 months without intervention. In this case sensors were sealed with rubber O-rings on the bottom of the enclosure behind a... The use of electrochemical sensors for monitoring urban air quality in low-cost, high-density networks. M. I. Mead1*, O.A.M. Popoola1, G. B. Stewart1, P. Landshoff3, M. Calleja2, M. Hayes2, J. J. Baldovi1, T. F. Hodgson1, M. W. McLeod1, J. Dicks4...

Mead, M I; Popoola, O A M; Stewart, G B; Landshoff, P; Calleja, M; Hayes, M; Baldovi, J J; Hodgson, T F; McLeod, M W; Dicks, J; Lewis, A; Cohen, J; Baron, R; Saffell, J R; Jones, R L

34

Assuring safety through operational approval : challenges in assessing and approving the safety of systems-level changes in air transportation  

E-Print Network (OSTI)

To improve capacity and efficiency of the air transportation system, a number of new systems-level changes have been proposed. Key aspects of the proposed changes are combined functionality across technology and procedures ...

Weibel, Roland E. (Roland Everett)

2010-01-01T23:59:59.000Z

35

Dynamic Control of Lab Air Change Rates using Multiplexed IEQ Monitoring  

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

Dynamic Control of Lab Air Change Rates using Multiplexed IEQ Monitoring Dynamic Control of Lab Air Change Rates using Multiplexed IEQ Monitoring Speaker(s): Gordon P. Sharp Date: October 14, 2005 - 12:00pm Location: Bldg. 90 Many aspects of a lab are monitored today in real time such as HVAC equipment operation and lab airflow quantities. However, the quality of lab room airflow or more specifically, the indoor environmental quality (IEQ) performance of a lab, beyond just temperature or perhaps humidity, is rarely monitored due to sensor cost and calibration issues. This is unfortunate, since detailed IEQ monitoring data can be used to substantially reduce lab energy consumption, increase lab safety and with some additional analysis, this data can be used to perform effective continuous commissioning. This presentation discusses a new type of real

36

Density Changes in Plutonium Observed from Accelerated Aging Using Pu-238 Enrichment  

Science Conference Proceedings (OSTI)

In support of Stockpile Stewardship activities, accelerated aging tests on a plutonium alloy enriched with 7.3 atomic percentage of {sup 238}Pu is underway using dilatometry at 35, 50, and 65 C and immersion density measurements of material stored at 50 C. Changes in density are expected from radiation damage in the lattice and helium in-growth. After twenty-five equivalent years of aging, the dilatometry data shows that the alloys at 35 C have expanded in volume by 0.11% to 0.12% and have started to exhibit a near linear expansion behavior primarily caused by the helium accumulation. The average He-to-vacancy ratio from tested specimens was determined to be around 2.3. The model for the lattice damage and helium in-growth accurately represents the volume swelling at 35 C. The density converted from the dilatometry corresponds well to the decreasing density trend of reference plutonium alloys as a function of time.

Chung, B W; Thompson, S R; Woods, C H; Hopkins, D J; Gourdin, W H; Ebbinghaus, B B

2005-10-19T23:59:59.000Z

37

Air Quality Responses to Changes in Black Carbon and Nitrogen Oxide Emissions  

E-Print Network (OSTI)

Air Resource Board, Sacramento, CA, April 2006. CARB (Air Resources Board, Sacramento, CA. CARB (2009a).Air Resources Board, Sacramento, CA. http://www.arb.ca.gov/

Millstein, Dev

2009-01-01T23:59:59.000Z

38

Macrolichens as biomonitors of air-quality change in western Pennsylvania  

SciTech Connect

Species richness of corticolous macrolichens was monitored at one- or two-year intervals on a total of 63 plots from 1997-2003 in a region of west-central Pennsylvania that included four coal-fired power generating stations and an industrial city. Lichen richness significantly increased from an average of 5.7 species/plot in 1997 to 9.3 species/plot in 2003. A linear mean rate of gain in species on regional monitoring plots was 0.56 species/yr. Plots along a major ridge top had a slower but significant gain in richness, and a localized area flanked by the city and two generating stations exhibited less lichen recolonization. Our results confirm the value of macrolichens as indicators of air quality and the importance of examining temporal as well as spatial changes in lichen richness to ascertain air-quality status.

McClenahen, J.R.; Davis, D.D.; Hutnik, R.J. [Ohio State Univ, Shreve, OH (United States)

2007-07-01T23:59:59.000Z

39

Density Changes in Plutonium Observed from Accelerated Aging using Pu-238 Enrichment  

Science Conference Proceedings (OSTI)

Plutonium, because of its radioactive nature, ages from the ''inside out'' by means of self-irradiation damage and thus produces Frankel-type defects (vacancies and self-interstitial atoms) and defect clusters. The self-irradiation damage in Plutonium-239 occurs mainly by {alpha}-particle decay, where most of the damage comes from the U-235 recoil nucleus. The defects resulting from the residual lattice damage and helium in-growth could result in microstructural and physical property changes. Because these self-irradiation effects would normally require decades to measure, with a fraction (7.5 wt%) of Pu-238 is added to the reference plutonium alloy thus accelerating the aging process by approximately 18 times the normal rate. By monitoring the properties of the Pu-238 spiked alloy over a period of about 3.5 years, the properties of plutonium in storage can be projected for periods up to about 60 years. This paper presents density and volume changes observed from the immersion density and dilatometry measurements equivalent to aging the reference plutonium alloys to nine years.

Chung, B W; Thompson, S R; Woods, C H; Hopkins, D J; Gourdin, W H; Ebbinghaus, B B

2003-12-19T23:59:59.000Z

40

The Impact of Climate Change on Air QualityRelated Meteorological Conditions in California. Part I: Present Time Simulation Analysis  

Science Conference Proceedings (OSTI)

This study investigates the impacts of climate change on meteorology and air quality conditions in California by dynamically downscaling Parallel Climate Model (PCM) data to high resolution (4 km) using the Weather Research and Forecast (WRF) ...

Zhan Zhao; Shu-Hua Chen; Michael J. Kleeman; Mary Tyree; Dan Cayan

2011-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "air density change" 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

Aerogels: stiff foams composed of up to 99.8% air Silica aerogel is the world's lowest-density solid: 1 mg/cm3  

E-Print Network (OSTI)

#12;Aerogels: stiff foams composed of up to 99.8% air Silica aerogel is the world's lowest-density solid: 1 mg/cm3 Aerogels hold 15 different records for material properties, including best insulator 2.38 g piece of aerogel supports a 2.5 kg brick. #12;#12;#12;l = m ? n unit vector in orbital space

Fominov, Yakov

42

Correlated solar wind speed, density, and magnetic field changes at J. D. Richardson and C. Wang1  

E-Print Network (OSTI)

., in press, 2003. Wang, C., and J. D. Richardson, Energy partition between solar wind protons and pickup ionsCorrelated solar wind speed, density, and magnetic field changes at Voyager 2 J. D. Richardson December 2003. [1] The character of the solar wind plasma data observed by Voyager 2 recently changed

Richardson, John

43

An Isofactorial Change-of-Scale Model for the Wind Speed Probability Density Function  

Science Conference Proceedings (OSTI)

The wind speed probability density function (PDF) is used in a variety of applications in meteorology, oceanography, and climatology usually as a dataset comparison tool of a function of a quantity such as momentum flux or wind power density. The ...

Mark L. Morrissey; Angie Albers; J. Scott Greene; Susan Postawko

2010-02-01T23:59:59.000Z

44

Air service to small communities-directions for the future : final report of the Workshop on Low/Medium Density Air Transportation  

E-Print Network (OSTI)

Introduction: In the decade between 1962 and 1972, certificated air service was deleted at about 250 points in the United States. In some of these cases, the service was no longer needed because of improved highway access ...

Vittek, Joseph F.

1974-01-01T23:59:59.000Z

45

Metal-Air Electric Vehicle Battery: Sustainable, High-Energy Density, Low-Cost Electrochemical Energy Storage Metal-Air Ionic Liquid (MAIL) Batteries  

SciTech Connect

Broad Funding Opportunity Announcement Project: ASU is developing a new class of metal-air batteries. Metal-air batteries are promising for future generations of EVs because they use oxygen from the air as one of the batterys main reactants, reducing the weight of the battery and freeing up more space to devote to energy storage than Li-Ion batteries. ASU technology uses Zinc as the active metal in the battery because it is more abundant and affordable than imported lithium. Metal-air batteries have long been considered impractical for EV applications because the water-based electrolytes inside would decompose the battery interior after just a few uses. Overcoming this traditional limitation, ASUs new battery system could be both cheaper and safer than todays Li-Ion batteries, store from 4-5 times more energy, and be recharged over 2,500 times.

2009-12-21T23:59:59.000Z

46

The impacts of aviation emissions on human health through changes in air quality and UV irradiance  

E-Print Network (OSTI)

World-wide demand for air transportation is rising steadily. The air transportation network may be limited by aviation's growing environmental impacts. These impacts take the form of climate impacts, noise impacts, and ...

Brunelle-Yeung, Elza

2009-01-01T23:59:59.000Z

47

Water Mass Analysis of Effect of Climate Change on AirSea CO2 Fluxes: The Southern Ocean  

Science Conference Proceedings (OSTI)

Impacts of climate change on airsea CO2 exchange are strongly region dependent, particularly in the Southern Ocean. Yet, in the Southern Ocean the role of water masses in the uptake of anthropogenic carbon is still debated. Here, a methodology is ...

Roland Sfrian; Daniele Iudicone; Laurent Bopp; Tilla Roy; Gurvan Madec

2012-06-01T23:59:59.000Z

48

Do Changes in the Midlatitude Circulation Have Any Impact on the Arctic Surface Air Temperature Trend?  

Science Conference Proceedings (OSTI)

The warming of the near-surface air in the Arctic region has been larger than the global mean surface warming. There is general agreement that the Arctic amplification of the surface air temperature (SAT) trend to a considerable extent is due to ...

R. G. Graversen

2006-10-01T23:59:59.000Z

49

Net Change in Forest Density, 1873-2001: Using Historical Maps to Monitor  

E-Print Network (OSTI)

CAMPUS BLVD SUITE 200 Publications Distribution NEWTOWN SQUARE PA 19073-3294 359 Main Road Delaware, OH, cooking, and steam- based locomotion. Kellogg (1907) estimated the U.S. annual cut rate to be 20 billion of the Distribution of North American Forests." William H. Brewer developed an 1873 map of forest density resulting

50

System transition : dynamics of change in the US air transportation system  

E-Print Network (OSTI)

The US Air Transportation System is currently facing a number of challenges including an increasing demand for travel and growing environmental requirements. In order to successfully meet future needs, the system will need ...

Mozdzanowska, Aleksandra L. (Aleksandra Ludmila), 1979-

2008-01-01T23:59:59.000Z

51

Modeling of Downward Surface Longwave Flux Density for Global Change Applications and Comparison with Pyrgeometer Measurements  

Science Conference Proceedings (OSTI)

The success of satellite monitoring of global climate change depends on the ability to validate satellite inference methods against accurate ground truth. Under a recent World Meteorological OrganizationWorld Climate Research Program activity ...

F. Miskolczi

1994-04-01T23:59:59.000Z

52

Recent Changes in NWS Upper-Air Observations with Emphasis on Changes from VIZ to Vaisala Radiosondes  

Science Conference Proceedings (OSTI)

Recent changes in the NWS upperair observing network are listed and an analysis is presented of the change in 1995 from VIZ to Vaisala radiosonde instruments. Results are shown for 14 stations at 850, 700, 500, 100, and 50 hPa and atboth 0000 and ...

William P. Elliott; Rebecca J. Ross; William H. Blackmore

2002-07-01T23:59:59.000Z

53

Cloud business intelligent services to explore the synergies and interactions among climate change, air quality objectives  

Science Conference Proceedings (OSTI)

In this paper, formal mathematical concepts of dimensions and their constrains, variables or facts, as well as of the optimization module are used to specify a GAINS (Greenhouse Gas - Air Pollution Interactions and Synergies) multi dimensional model. ... Keywords: GAINS, UML, business intelligence, data warehouse

Thanh Binh Nguyen; Fabian Wagner; Wolfgang Schoepp

2012-08-01T23:59:59.000Z

54

Can Shipboard Measurements Reveal Secular Changes in Tropical AirSea Heat Flux?  

Science Conference Proceedings (OSTI)

A new Comprehensive Ocean-Atmosphere Data Set for the period 18541979 will soon become available for studies of secular climate changes in ocean surface heat flux. Of the observed variables from which heat flux is calculated, wind speed and sea ...

C. S. Ramage

1984-02-01T23:59:59.000Z

55

Changes in mixing ratio and isotopic composition of CO2 in urban air from the Los Angeles basin, California, between 1972 and 2003  

E-Print Network (OSTI)

reflects a change in the relative proportion of natural gas and petroleum products burned in the regionChanges in mixing ratio and isotopic composition of CO2 in urban air from the Los Angeles basin December 2008. [1] Atmospheric CO2 mixing ratios and C and O isotopic compositions are reported for the Los

56

CLIMATE CHANGE FUEL CELL PROGRAM UNITED STATES COAST GUARD AIR STATION CAPE COD BOURNE, MASSACHUSETTS  

DOE Green Energy (OSTI)

This report covers the first year of operation of a fuel cell power plant, installed by PPL Spectrum, Inc. (PPL) under contract with the United States Coast Guard (USCG), Research and Development Center (RDC). The fuel cell was installed at Air Station Cape Cod in Bourne, MA. The project had the support of the Massachusetts Technology Collaborative (MTC), the Department of Energy (DOE), and Keyspan Energy. PPL selected FuelCell Energy, Inc. (FCE) and its fuel cell model DFC{reg_sign}300 for the contract. Grant contributions were finalized and a contract between PPL and the USCG for the manufacture, installation, and first year's maintenance of the fuel cell was executed on September 24, 2001. As the prime contractor, PPL was responsible for all facets of the project. All the work was completed by PPL through various subcontracts, including the primary subcontract with FCE for the manufacture, delivery, and installation of the fuel cell. The manufacturing and design phases proceeded in a relatively timely manner for the first half of the project. However, during latter stages of manufacture and fuel cell testing, a variety of issues were encountered that ultimately resulted in several delivery delays, and a number of contract modifications. Final installation and field testing was completed in April and May 2003. Final acceptance of the fuel cell was completed on May 16, 2003. The fuel cell has operated successfully for more than one year. The unit achieved an availability rate of 96%, which exceeded expectations. The capacity factor was limited because the unit was set at 155 kW (versus a nameplate of 250 kW) due to the interconnection with the electric utility. There were 18 shutdowns during the first year and most were brief. The ability of this plant to operate in the island mode improved availability by 3 to 4%. Events that would normally be shutdowns were simply island mode events. The mean time between failure was calculated at 239 hours, or slightly less than 10 days. The fuel cell did run continuously for more than one month on three occasions during the first year. Overall efficiency, including the thermal recovery, was found to be over 60%. Operation for the fuel cell during the first year produced net savings for the Coast Guard of over $18,000.

John K. Steckel Jr

2004-06-30T23:59:59.000Z

57

Feasibility of air capture  

E-Print Network (OSTI)

Capturing CO2 from air, referred to as Air Capture, is being proposed as a viable climate change mitigation technology. The two major benefits of air capture, reported in literature, are that it allows us to reduce the ...

Ranjan, Manya

2010-01-01T23:59:59.000Z

58

Hydrogenation and surface density changes in hydrocarbon films during erosion using Ar/H{sub 2} plasmas  

SciTech Connect

We report interactions of low pressure Ar, H{sub 2}, and Ar/H{sub 2} mixture plasmas with a-C:H films. Surface evolution and erosion of a-C:H films were examined for ion energies up to 200 eV by rf biasing the substrates. Film surfaces were characterized using in situ ellipsometry, x-ray photoelectron spectroscopy, and atomic force microscopy. Multilayer models for steady-state modified surface layers are constructed using ellipsometric data and compared with results of molecular dynamics (MD) simulations and transport of ions in matter (TRIM) calculations. We find that Ar plasma causes a modified layer at the surface that is depleted of H atoms. The depth and degree of this modification is strongly depending on Ar ion energies. This depletion saturates quickly during plasma exposure (<1 s) and persists during steady-state erosion. We find that the thickness and density of the H-depleted layer are in good agreement with MD and TRIM simulations. The degree of surface densification decreases when small amounts of H{sub 2} are added to Ar plasmas. When more than 5% H{sub 2} is added to the plasma, long term loss in surface density is observed, indicating rehydrogenation and saturation of H in the film. As the H{sub 2} fraction increases, the near-surface atomic H increases and the ion composition bombarding the surface changes. This causes incorporation of H deeper into the a-C:H film. For a-C:H films exposed to pure H{sub 2} plasmas, H is introduced into the near-surface region to a depth of up to {approx}8 nm from the surface. As the rf bias is increased the ion energy transitions from solely chemical sputtering to one involving physical sputtering, causing the yield of C atoms from the surface to greatly increase. The increasing yield suppresses H incorporation/saturation and decreases the magnitude of the modified surface layer.

Fox-Lyon, N.; Oehrlein, G. S. [Department of Materials Science and Engineering and Institute for Research in Electronics and Applied Physics, University of Maryland, College Park, Maryland 20742 (United States); Ning, N.; Graves, D. B. [Department of Chemical Engineering, University of California, Berkeley, California 94720 (United States)

2011-11-15T23:59:59.000Z

59

Feature - Lithium-air Batteries  

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

Develop Lithium-Air Battery Li-air Li-air batteries hold the promise of increasing the energy density of Li-ion batteries by as much as five to 10 times. But that potential will...

60

ISOTHERMAL AIR INGRESS VALIDATION EXPERIMENTS  

SciTech Connect

Idaho National Laboratory carried out air ingress experiments as part of validating computational fluid dynamics (CFD) calculations. An isothermal test loop was designed and set to understand the stratified-flow phenomenon, which is important as the initial air flow into the lower plenum of the very high temperature gas cooled reactor (VHTR) when a large break loss-of-coolant accident occurs. The unique flow characteristics were focused on the VHTR air-ingress accident, in particular, the flow visualization of the stratified flow in the inlet pipe to the vessel lower plenum of the General Atomics Gas Turbine-Modular Helium Reactor (GT-MHR). Brine and sucrose were used as heavy fluids, and water was used to represent a light fluid, which mimics a counter current flow due to the density difference between the stimulant fluids. The density ratios were changed between 0.87 and 0.98. This experiment clearly showed that a stratified flow between simulant fluids was established even for very small density differences. The CFD calculations were compared with experimental data. A grid sensitivity study on CFD models was also performed using the Richardson extrapolation and the grid convergence index method for the numerical accuracy of CFD calculations . As a result, the calculated current speed showed very good agreement with the experimental data, indicating that the current CFD methods are suitable for predicting density gradient stratified flow phenomena in the air-ingress accident.

Chang H Oh; Eung S Kim

2011-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "air density change" 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

Contribution of Land Use Changes to Near-Surface Air Temperatures during Recent Summer Extreme Heat Events in the Phoenix Metropolitan Area  

Science Conference Proceedings (OSTI)

The impact of 19732005 land useland cover (LULC) changes on near-surface air temperatures during four recent summer extreme heat events (EHEs) are investigated for the arid Phoenix, Arizona, metropolitan area using the Weather Research and ...

Susanne Grossman-Clarke; Joseph A. Zehnder; Thomas Loridan; C. Sue B. Grimmond

2010-08-01T23:59:59.000Z

62

NREL Demonstrates Game-Changing Air Conditioner Technology (Fact Sheet), Highlights in Research & Development, NREL (National Renewable Energy Laboratory)  

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

Testing of DEVAP prototype validates modeled Testing of DEVAP prototype validates modeled predictions of 40% to 85% energy savings. Researchers in the NREL Buildings group are moving the award-winning desiccant enhanced evaporative (DEVAP) air conditioning technol- ogy further toward commercialization by demonstrating that its energy-saving perfor- mance matches closely with thermodynamic model predictions. Industry partners Synapse Product Development and AIL Research built two prototypes of DEVAP based on NREL's design and modeling, which were tested in NREL's Advanced HVAC Systems Laboratory. Experiments added confidence to the predicted energy savings of 40% in humid climates and 85% in dry climates, empowering the model as a tool for developing marketable designs, and illustrating the potential of DEVAP to transform

63

Precise and Accurate Density Determination of Explosives Using Hydrostatic Weighing  

SciTech Connect

Precise and accurate density determination requires weight measurements in air and water using sufficiently precise analytical balances, knowledge of the densities of air and water, knowledge of thermal expansions, availability of a density standard, and a method to estimate the time to achieve thermal equilibrium with water. Density distributions in pressed explosives are inferred from the densities of elements from a central slice.

B. Olinger

2005-07-01T23:59:59.000Z

64

Density-permittivity relationships for powdered and granular materials  

SciTech Connect

Relationships between the permittivities of powdered or granular solid materials and their bulk densities (density of the air-particle mixture) are discussed. Linear relationships between functions of the permittivity and bulk density are identified that are useful in determining permittivity of solids from measurements of the permittivity of pulverized samples. The usefulness of several dielectric mixture equations for calculating solid material permittivity from measured permittivity of pulverized samples is also discussed. Results of testing linear extrapolation techniques and dielectric mixture equations on pulverized coal, limestone, plastics, and granular wheat and flour are presented. Recommendations are provided for reliable estimation of solid material permittivities or changes in permittivities of powdered and granular materials as a result of changes in their bulk densities.

Nelson, S.O. [USDA ARS, Athens, GA (United States). Russell Research Center

2005-10-01T23:59:59.000Z

65

Using Hydrated Salt Phase Change Materials for Residential Air Conditioning Peak Demand Reduction and Energy Conservation in Coastal and Transitional Climates in the State of California.  

E-Print Network (OSTI)

??The recent rapid economic and population growth in the State of California have led to a significant increase in air conditioning use, especially in areas (more)

Lee, Kyoung Ok

2013-01-01T23:59:59.000Z

66

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.

67

Laser sheet light flow visualization for evaluating room air flowsfrom Registers  

SciTech Connect

Forced air heating and cooling systems and whole house ventilation systems deliver air to individual rooms in a house via supply registers located on walls ceilings or floors; and occasionally less straightforward locations like toe-kicks below cabinets. Ideally, the air velocity out of the registers combined with the turbulence of the flow, vectoring of air by register vanes and geometry of register placement combine to mix the supply air within the room. A particular issue that has been raised recently is the performance of multiple capacity and air flow HVAC systems. These systems vary the air flow rate through the distribution system depending on the system load, or if operating in a ventilation rather than a space conditioning mode. These systems have been developed to maximize equipment efficiency, however, the high efficiency ratings do not include any room mixing effects. At lower air flow rates, there is the possibility that room air will be poorly mixed, leading to thermal stratification and reduced comfort for occupants. This can lead to increased energy use as the occupants adjust the thermostat settings to compensate and parts of the conditioned space have higher envelope temperature differences than for the well mixed case. In addition, lack of comfort can be a barrier to market acceptance of these higher efficiency systems To investigate the effect on room mixing of reduced air flow rates requires the measurement of mixing of supply air with room air throughout the space to be conditioned. This is a particularly difficult exercise if we want to determine the transient performance of the space conditioning system. Full scale experiments can be done in special test chambers, but the spatial resolution required to fully examine the mixing problem is usually limited by the sheer number of thermal sensors required. Current full-scale laboratory testing is therefore severely limited in its resolution. As an alternative, we used a water-filled scale model of a room in which whole-field supply air mixing maps of two vertical planes were measured using a Planar Laser-Induced Fluorescence (PLIF) measurement technique. Water marked with fluorescent dye was used to simulate the supply airflow; and the resulting concentrations within the water filled model show how the supply air mixes with the room air and are an analog for temperature (for thermal loads) or fresh air (for ventilation). In addition to performing experiments over a range of flow rates, we also changed register locations and examined the effects for both heating and cooling operation by changing the water density (simulating air density changes due to temperature changes) using dissolved salt.

Walker, Iain S.; Claret, Valerie; Smith, Brian

2006-04-01T23:59:59.000Z

68

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

69

Ga Air Compressor, Ga Air Compressor Products, Ga Air ...  

U.S. Energy Information Administration (EIA)

Ga Air Compressor, You Can Buy Various High Quality Ga Air Compressor Products from Global Ga Air Compressor Suppliers and Ga Air Compressor ...

70

Anomalous evolution of Ar metastable density with electron density in high density Ar discharge  

SciTech Connect

Recently, an anomalous evolution of argon metastable density with plasma discharge power (electron density) was reported [A. M. Daltrini, S. A. Moshkalev, T. J. Morgan, R. B. Piejak, and W. G. Graham, Appl. Phys. Lett. 92, 061504 (2008)]. Although the importance of the metastable atom and its density has been reported in a lot of literature, however, a basic physics behind the anomalous evolution of metastable density has not been clearly understood yet. In this study, we investigated a simple global model to elucidate the underlying physics of the anomalous evolution of argon metastable density with the electron density. On the basis of the proposed simple model, we reproduced the anomalous evolution of the metastable density and disclosed the detailed physics for the anomalous result. Drastic changes of dominant mechanisms for the population and depopulation processes of Ar metastable atoms with electron density, which take place even in relatively low electron density regime, is the clue to understand the result.

Park, Min; Chang, Hong-Young [Department of Physics, Korea Advanced Institute of Science and Technology, Daejeon 305-701 (Korea, Republic of); You, Shin-Jae; Kim, Jung-Hyung [Center for Vacuum Technology, Korea Research Institute of Standards and Science, Daejeon, 305-306 (Korea, Republic of); Shin, Yong-Hyeon

2011-10-15T23:59:59.000Z

71

Air Resources Board  

E-Print Network (OSTI)

The Air Resources Board (ARB or Board) will conduct a public hearing at the time and place noted below to consider adoption of the Proposed Airborne Toxic Control Measure (ATCM) to Reduce Formaldehyde Emissions from Composite Wood Products. The proposed ATCM would reduce the publics current exposure to formaldehyde by reducing emissions from hardwood plywood (HWPW), particleboard (PB) and medium density fiberboard (MDF) panels. The ATCM would also apply to finished goods made with these materials.

unknown authors

2007-01-01T23:59:59.000Z

72

Density rise experiment on PLT  

SciTech Connect

The evolution of the density profile in PLT during intense gas puffing is documented and analyzed. Measurements of the spectrum of low energy edge neutrals and of the change in central neutral density indicate that charge-exchange processes alone cannot account for the central density rise. The transient density profile changes can be reproduced numerically by a diffusivity of approx. 10/sup 4/ cm/sup 2//s, and a spatially averaged inward flow of 10/sup 3/ cm/s. These transport coefficients are 10 ..-->.. 10/sup 2/ times larger than neoclassical. The ion energy confinement is reduced, the small scale density fluctuations are increased, and runaway electrons losses are increased during the density rise.

Strachan, J.D.; Bretz, N.; Mazzucato, E.

1982-05-01T23:59:59.000Z

73

The Impact of Climate Change on Air QualityRelated Meteorological Conditions in California. Part II: Present versus Future Time Simulation Analysis  

Science Conference Proceedings (OSTI)

In this study, the Weather Research and Forecasting (WRF) model was applied to dynamically downscale the Parallel Climate Model (PCM) projection for the climate change impact on regional meteorological conditions in California. Comparisons were ...

Zhan Zhao; Shu-Hua Chen; Michael J. Kleeman; Abdullah Mahmud

2011-07-01T23:59:59.000Z

74

The Impact of Climate Change on Air Quality Related Meteorological Conditions in California Part II: Present versus Future Time Simulation Analysis  

Science Conference Proceedings (OSTI)

In this study, the Weather Research and Forecasting (WRF) model was applied to dynamically downscale the Parallel Climate Model (PCM) projection for the climate change impact on regional meteorological conditions in California (CA). Comparisons ...

Zhan Zhao; Shu-Hua Chen; Michael J. Kleeman; Abdullah Mahmud

75

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

76

Lithium-Air Battery: High Performance Cathodes for Lithium-Air Batteries  

SciTech Connect

BEEST Project: Researchers at Missouri S&T are developing an affordable lithium-air (Li-Air) battery that could enable an EV to travel up to 350 miles on a single charge. Todays EVs run on Li-Ion batteries, which are expensive and suffer from low energy density compared with gasoline. This new Li-Air battery could perform as well as gasoline and store 3 times more energy than current Li-Ion batteries. A Li-Air battery uses an air cathode to breathe oxygen into the battery from the surrounding air, like a human lung. The oxygen and lithium react in the battery to produce electricity. Current Li-Air batteries are limited by the rate at which they can draw oxygen from the air. The team is designing a battery using hierarchical electrode structures to enhance air breathing and effective catalysts to accelerate electricity production.

2010-08-01T23:59:59.000Z

77

Transport Energy Use and Population Density  

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

Transport Energy Use and Population Density Transport Energy Use and Population Density Speaker(s): Masayoshi Tanishita Date: July 1, 2004 - 10:00pm Location: Bldg. 90 Seminar Host/Point of Contact: Jonathan Sinton After Peter Newman and Jeffrey Kenworthy published "Cities and Automobile Dependence" in 1989, population density was brought to public attention as an important factor to explain transport mobility and energy use. However, several related issues still remain open: Is an increase in population density more effective than rising gas prices in reducing transport energy use? How much does per capita transport energy use change as population density in cities changes? And what kind of factors influence changes in population density? In this presentation, using city-level data in the US, Japan and other countries, the population-density elasticity of

78

Air Pollution (Illinois)  

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

This article states regulations for monitoring air pollution, methods for permit applications, emission limitations for pollutants and air quality standards.

79

Simulation of air and mist drilling for geothermal wells  

SciTech Connect

An air drilling model has been developed that accounts for cuttings and mist. Comparison of the model results with previous work shows this model to be more conservative. The equations developed are simple enough to be used in hand calculations, but the full capability of the model is more easily obtained with a computer program. Studies with the model show that volume requirements and standpipe pressures are significantly different for mist drilling compared with air drilling. An improved method for calculating downhole temperatures, pressures, fluid densities, and velocities during air drilling has been developed. Improvements on previous methods include the following. A fully transient thermal analysis of the wellbore and formation is used to determine the flowing temperatures. The effects of flow acceleration are included explicitly in the calculation. The slip velocity between the gas and the cuttings is determined by the use of a separate momentum equation for the cuttings. The possibility of critical flow in the wellbore is tested and appropriate changes in the volume flow rate and standpipe pressure are made automatically. The standpipe and flowing pressures are predicted. The analysis is conservative. The effect of the cuttings on the wellbore flow will tend to overpredict the required volume flow rates. In this paper, the basic equations of fluid flow for a gas with cuttings and mist are presented along with a numerical method for their solution. Several applications of this calculational method are given, showing the effect of flow rate and standpipe pressure in typical air and mist drilling situations.

Mitchell, R.F.

1983-11-01T23:59:59.000Z

80

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.

Note: This page contains sample records for the topic "air density change" 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

Scattering Length Density Calculator  

Science Conference Proceedings (OSTI)

... For energy dependent cross sections please go to ... The neutron scattering length density is defined ... To calculate scattering length densities enter a ...

82

Metal-Air Batteries  

Science Conference Proceedings (OSTI)

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

83

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

84

Imaging Lithium Air Electrodes | ornl.gov  

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

Neutron Imaging Reveals Lithium Distribution in Lithium-Air Electrodes Neutron Imaging Reveals Lithium Distribution in Lithium-Air Electrodes Agatha Bardoel - January 01, 2013 Image produced by neutron-computed tomography. The next step in revolutionizing electric vehicle capacity Research Contacts: Hassina Bilheux, Jagjit Nanda, and S. Pannala Using neutron-computed tomography, researchers at the CG-1D neutron imaging instrument at Oak Ridge National Laboratory's High Flux Isotope Reactor (HFIR) have successfully mapped the three-dimensional spatial distribution of lithium products in electrochemically discharged lithium-air cathodes. Lithium-air chemistry promises very high-energy density that, if successful, would revolutionize the world of electric vehicles by extending their range to 500 miles or more. The high-energy density comes from

85

Primary zone air proportioner  

SciTech Connect

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

86

Air Pollution Control (Indiana)  

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

This legislation establishes the Department of Environmental Management and the Air Pollution Control Board, which are tasked with the prevention, abatement, and control of air pollution by all...

87

Air pollution  

SciTech Connect

This book reports that homeowners do not have adequate assurance that companies have demonstrated a minimum level of competency in measuring radon and that the test results provided to them have some degree of accuracy. This is because the voluntary nature of the RMP program allows firms to market devices that have not been tested or that failed the test. In addition, the RMP program does not require measurement companies to implement quality assurance programs. GAO believes that two changes in the RMP program that would increase homeowners' assurance are requiring measurement firms to pass the RMP program before marketing their devices, and requiring radon measurement firms to demonstrate the existence of adequate quality assurance programs as a condition for participating in the RMP program.

1990-08-01T23:59:59.000Z

88

Argonne TTRDC - TransForum v10n1 - Lithium-Air Battery  

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

With Argonne Contact TTRDC TransForum Vol. 10, No. 1 Argonne to Explore Lithium-air Battery Li-air batteries hold the promise of increasing the energy density of LI-ion...

89

COMBUSTION-GENERATED INDOOR AIR POLLUTION  

E-Print Network (OSTI)

x A Emission Characteristics in Two Stage Combustion. PaperInternational) on Combustion, Tokyo (August, 1974). Chang,fll , J I ___F J "J LBL-S9lS COMBUSTION-GENERATED INDOOR AIR

Hollowell, C.D.

2010-01-01T23:59:59.000Z

90

Lifting of Ambient Air by Density Currents in Sheared Environments  

Science Conference Proceedings (OSTI)

Two aspects of vorticity associated with cold pools are addressed. First, tilting of horizontal vortex tubes by the updraft at a gust front has been proposed as a means of getting near-ground rotation and hence a tornado. Theory and a numerical ...

Robert Davies-Jones; Paul Markowski

2013-04-01T23:59:59.000Z

91

A Novel VLSI Technology to Manufacture High-Density Thermoelectric Cooling Devices  

E-Print Network (OSTI)

This paper describes a novel integrated circuit technology to manufacture high-density thermoelectric devices on a semiconductor wafer. With no moving parts, a thermoelectric cooler operates quietly, allows cooling below ambient temperature, and may be used for temperature control or heating if the direction of current flow is reversed. By using a monolithic process to increase the number of thermoelectric couples, the proposed solid-state cooling technology can be combined with traditional air cooling, liquid cooling, and phase-change cooling to yield greater heat flux and provide better cooling capability.

H. Chen; L. Hsu; X. Wei

2008-01-07T23:59:59.000Z

92

Rock Density | Open Energy Information  

Open Energy Info (EERE)

form form View source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Page Edit with form History Facebook icon Twitter icon » Rock Density Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Rock Density Details Activities (2) Areas (2) Regions (0) NEPA(0) Exploration Technique Information Exploration Group: Lab Analysis Techniques Exploration Sub Group: Rock Lab Analysis Parent Exploration Technique: Rock Lab Analysis Information Provided by Technique Lithology: Density of different lithologic units. Stratigraphic/Structural: Hydrological: Thermal: Cost Information Low-End Estimate (USD): 10.001,000 centUSD 0.01 kUSD 1.0e-5 MUSD 1.0e-8 TUSD / sample

93

Center for Clean Air Policy (CCAP) | Open Energy Information  

Open Energy Info (EERE)

windex.php?titleCenterforCleanAirPolicy(CCAP)&oldid378943" Categories: Clean Energy Organizations Policy Organizations Organizations What links here Related changes...

94

Improving air handler efficiency in houses  

SciTech Connect

Although furnaces, air conditioners and heat pumps have become significantly more efficient over the last couple of decades, residential air handlers have typical efficiencies of only 10% to 15% due to poor electric motor performance and aerodynamically poor fans and fan housings. Substantial increases in performance could be obtained through improved air handler design and construction. A prototype residential air handler intended to address these issues has recently been developed. The prototype and a standard production fan were tested in a full-scale duct system and test chamber at LBNL specifically designed for testing heating, ventilation, and air conditioning systems. The laboratory tests compared efficiency, total airflow, sensitivity to duct system flow resistance, and the effects of installation in a smaller cabinet. The test results showed that the prototype air handler had about twice the efficiency of the standard air handler (averaged over a wide range of operating conditions) and was less sensitive to duct system flow resistance changes. The performance of both air handlers was significantly reduced by reducing the clearance between the air handler and cabinet it was placed in. These test results showed that in addition to the large scope for performance improvement, air handler fans need to be tested in the cabinets they operate in.

Walker, Iain S.

2004-05-01T23:59:59.000Z

95

Energy Basics: Solar Air Heating  

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

EERE: Energy Basics Solar Air Heating Solar air heating systems use air as the working fluid for absorbing and transferring solar energy. Solar air collectors (devices to heat air...

96

Isokinetic air sampler  

DOE Patents (OSTI)

An isokinetic air sampler includes a filter, a holder for the filter, an air pump for drawing air through the filter at a fixed, predetermined rate, an inlet assembly for the sampler having an inlet opening therein of a size such that isokinetic air sampling is obtained at a particular wind speed, a closure for the inlet opening and means for simultaneously opening the closure and turning on the air pump when the wind speed is such that isokinetic air sampling is obtained. A system incorporating a plurality of such samplers provided with air pumps set to draw air through the filter at the same fixed, predetermined rate and having different inlet opening sizes for use at different wind speeds is included within the ambit of the present invention as is a method of sampling air to measure airborne concentrations of particulate pollutants as a function of wind speed.

Sehmel, George A. (Richland, WA)

1979-01-01T23:59:59.000Z

97

Surface interactions involved in flashover with high density electronegative gases.  

Science Conference Proceedings (OSTI)

This report examines the interactions involved with flashover along a surface in high density electronegative gases. The focus is on fast ionization processes rather than the later time ionic drift or thermalization of the discharge. A kinetic simulation of the gas and surface is used to examine electron multiplication and includes gas collision, excitation and ionization, and attachment processes, gas photoionization and surface photoemission processes, as well as surface attachment. These rates are then used in a 1.5D fluid ionization wave (streamer) model to study streamer propagation with and without the surface in air and in SF6. The 1.5D model therefore includes rates for all these processes. To get a better estimate for the behavior of the radius we have studied radial expansion of the streamer in air and in SF6. The focus of the modeling is on voltage and field level changes (with and without a surface) rather than secondary effects, such as, velocities or changes in discharge path. An experiment has been set up to carry out measurements of threshold voltages, streamer velocities, and other discharge characteristics. This setup includes both electrical and photographic diagnostics (streak and framing cameras). We have observed little change in critical field levels (where avalanche multiplication sets in) in the gas alone versus with the surface. Comparisons between model calculations and experimental measurements are in agreement with this. We have examined streamer sustaining fields (field which maintains ionization wave propagation) in the gas and on the surface. Agreement of the gas levels with available literature is good and agreement between experiment and calculation is good also. Model calculations do not indicate much difference between the gas alone versus the surface levels. Experiments have identified differences in velocity between streamers on the surface and in the gas alone (the surface values being larger).

Hodge, Keith Conquest; Warne, Larry Kevin; Jorgenson, Roy Eberhardt; Wallace, Zachariah Red; Lehr, Jane Marie

2010-01-01T23:59:59.000Z

98

STUDY ON AIR INGRESS MITIGATION METHODS IN THE VERY HIGH TEMPERATURE GAS COOLED REACTOR (VHTR)  

SciTech Connect

An air-ingress accident followed by a pipe break is considered as a critical event for a very high temperature gas-cooled reactor (VHTR). Following helium depressurization, it is anticipated that unless countermeasures are taken, air will enter the core through the break leading to oxidation of the in-core graphite structure. Thus, without mitigation features, this accident might lead to severe exothermic chemical reactions of graphite and oxygen. Under extreme circumstances, a loss of core structural integrity may occur along with excessive release of radiological inventory. Idaho National Laboratory under the auspices of the U.S. Department of Energy is performing research and development (R&D) that focuses on key phenomena important during challenging scenarios that may occur in the VHTR. Phenomena Identification and Ranking Table (PIRT) studies to date have identified the air ingress event, following on the heels of a VHTR depressurization, as very important (Oh et al. 2006, Schultz et al. 2006). Consequently, the development of advanced air ingress-related models and verification and validation (V&V) requirements are part of the experimental validation plan. This paper discusses about various air-ingress mitigation concepts applicable for the VHTRs. The study begins with identifying important factors (or phenomena) associated with the air-ingress accident by using a root-cause analysis. By preventing main causes of the important events identified in the root-cause diagram, the basic air-ingress mitigation ideas can be conceptually derived. The main concepts include (1) preventing structural degradation of graphite supporters; (2) preventing local stress concentration in the supporter; (3) preventing graphite oxidation; (4) preventing air ingress; (5) preventing density gradient driven flow; (4) preventing fluid density gradient; (5) preventing fluid temperature gradient; (6) preventing high temperature. Based on the basic concepts listed above, various air-ingress mitigation methods are proposed in this study. Among them, the following two mitigation ideas are extensively investigated using computational fluid dynamic codes (CFD): (1) helium injection in the lower plenum, and (2) reactor enclosure opened at the bottom. The main idea of the helium injection method is to replace air in the core and the lower plenum upper part by buoyancy force. This method reduces graphite oxidation damage in the severe locations of the reactor inside. To validate this method, CFD simulations are addressed here. A simple 2-D CFD model is developed based on the GT-MHR 600MWt design. The simulation results showed that the helium replace the air flow into the core and significantly reduce the air concentration in the core and bottom reflector potentially protecting oxidation damage. According to the simulation results, even small helium flow was sufficient to remove air in the core, mitigating the air-ingress successfully. The idea of the reactor enclosure with an opening at the bottom changes overall air-ingress mechanism from natural convection to molecular diffusion. This method can be applied to the current system by some design modification of the reactor cavity. To validate this concept, this study also uses CFD simulations based on the simplified 2-D geometry. The simulation results showed that the enclosure open at the bottom can successfully mitigate air-ingress into the reactor even after on-set natural circulation occurs.

Chang H. Oh

2011-03-01T23:59:59.000Z

99

Vermont Air Pollution Control Regulations, Ambient Air Quality...  

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

Ambient Air Quality Standards (Vermont) Vermont Air Pollution Control Regulations, Ambient Air Quality Standards (Vermont) Eligibility Utility Agricultural Investor-Owned Utility...

100

Vsd Oil Free Air Compressor, Vsd Oil Free Air Compressor ...  

U.S. Energy Information Administration (EIA)

Vsd Oil Free Air Compressor, You Can Buy Various High Quality Vsd Oil Free Air Compressor Products from Global Vsd Oil Free Air Compressor Suppliers ...

Note: This page contains sample records for the topic "air density change" 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

China Ga Air Compressor, China Ga Air Compressor Products ...  

U.S. Energy Information Administration (EIA)

China Ga Air Compressor, China Ga Air Compressor Suppliers and Manufacturers Directory - Source a Large Selection of Ga Air Compressor Products at ...

102

Oil Free Vsd Air Compressor, Oil Free Vsd Air Compressor ...  

U.S. Energy Information Administration (EIA)

Oil Free Vsd Air Compressor, You Can Buy Various High Quality Oil Free Vsd Air Compressor Products from Global Oil Free Vsd Air Compressor Suppliers ...

103

Screw Type Ac Air Compressor Manufacturers, Screw Type Ac Air ...  

U.S. Energy Information Administration (EIA)

Screw Type Ac Air Compressor, Screw Type Ac Air Compressor Manufacturers & Suppliers Directory - Find here Screw Type Ac Air Compressor Traders, ...

104

Air Conditioning and lungs  

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

Air Conditioning and lungs Name: freeman Status: NA Age: NA Location: NA Country: NA Date: Around 1993 Question: What affect does air conditioning have upon the lungs of the...

105

Vibrated Bulk Density (VBD) of Calcined Petroleum Coke and ...  

Science Conference Proceedings (OSTI)

Presentation Title, Vibrated Bulk Density (VBD) of Calcined Petroleum Coke and Implications of Changes in the ASTM Method D4292. Author(s), Bill Spencer,...

106

Density-dependent covariant energy density functionals  

Science Conference Proceedings (OSTI)

Relativistic nuclear energy density functionals are applied to the description of a variety of nuclear structure phenomena at and away fromstability line. Isoscalar monopole, isovector dipole and isoscalar quadrupole giant resonances are calculated using fully self-consistent relativistic quasiparticle randomphase approximation, based on the relativistic Hartree-Bogoliubovmodel. The impact of pairing correlations on the fission barriers in heavy and superheavy nuclei is examined. The role of pion in constructing desnity functionals is also investigated.

Lalazissis, G. A. [Physics Department, Aristotle University of Thessaloniki, GR-54124 (Greece)

2012-10-20T23:59:59.000Z

107

Air Pollution- Local Air Quality (Ontario, Canada)  

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

The Air Pollution regulation administered by the Ministry of the Environment enforces compliance to the standards set in the Ontario law. The law is phased in, with portions taking effect in 2010,...

108

Ohio Air Quality Development Authority Tax Incentives (Ohio) | Department  

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

Air Quality Development Authority Tax Incentives (Ohio) Air Quality Development Authority Tax Incentives (Ohio) Ohio Air Quality Development Authority Tax Incentives (Ohio) < Back Eligibility Commercial Construction Fuel Distributor Industrial Retail Supplier Savings Category Buying & Making Electricity Solar Wind Program Info State Ohio Program Type Corporate Tax Incentive Provider Ohio Air Quality Development Authority The Ohio Air Quality Development Authority provides financing for new air quality facilities for all types of Ohio businesses, ranging from small, family-owned shops to multi-million-dollar manufacturing plants. Many large Ohio companies, in fact, are required to purchase new equipment or make operational changes to comply with EPA air quality regulations. Smaller companies of 100 or fewer employees may also need to make similar changes.

109

PFT Air Infiltration Measurement Technique | Department of Energy  

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

PFT Air Infiltration Measurement Technique PFT Air Infiltration Measurement Technique PFT Air Infiltration Measurement Technique April 2, 2012 - 3:11pm Addthis The Brookhaven National Laboratory developed the PFT (PerFluorocarbon tracer gas) technique to measure changes over time when determining a building's air-infiltration rate. The Brookhaven National Laboratory developed the PFT (PerFluorocarbon tracer gas) technique to measure changes over time when determining a building's air-infiltration rate. What does this mean for me? You can save 5%-30% on your energy bill by making upgrades following a home energy assessment. A professional energy auditor may use the PFT air infiltration measurement technique to find out where your home has air leaks, though a blower door test is more commonly used.

110

AirShares EU Carbon Allowances Fund | Open Energy Information  

Open Energy Info (EERE)

AirShares EU Carbon Allowances Fund AirShares EU Carbon Allowances Fund Jump to: navigation, search Name AirShares EU Carbon Allowances Fund Place New York, New York Zip 10170 Product AirShares is a commodity pool for exchange-traded futures contracts for EUAs. References AirShares EU Carbon Allowances Fund[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. AirShares EU Carbon Allowances Fund is a company located in New York, New York . References ↑ "AirShares EU Carbon Allowances Fund" Retrieved from "http://en.openei.org/w/index.php?title=AirShares_EU_Carbon_Allowances_Fund&oldid=341942" Categories: Clean Energy Organizations Companies Organizations Stubs What links here Related changes

111

Air pollution and lung cancer  

SciTech Connect

Epidemiological evidence proves conclusively that lung cancer correlates with air pollution. However, data on lung cancer death rates and smoking show that mankind accepts the risk of long-term and low-level exposure to carcinogens. As a rule, immediate benefits are sought and remote hazards ignored. Fear of atmospheric contamination by radioactive fallout seems to be the main factor for awareness of air pollution. Experimental works help us to understand physics of particle deposition in the lungs (inertial impactation, sedimentation, Brownian movement), shed light on carcinogenesis (eg, bay region theory in case of polycyclic aromatic hydrocarbons and surface charge changes regarding asbestos), show that atmospheric particulates accepted as harmless may act as co-carcinogens (eg, iron and benzo(a)pyrene) and stress the importance of in vitro research (bacterial mutation tests, organ cultures, sister chromatid exchange system) to screen pollutants for their malignant potential and study their pathogenesis.

Boehm, G.M.

1982-01-01T23:59:59.000Z

112

Indoor Air Quality Group  

Science Conference Proceedings (OSTI)

... CONTAM has been used at NIST to study the indoor air quality impacts of HVAC systems in single-family residential buildings, ventilation in large ...

2011-10-31T23:59:59.000Z

113

Air Resources Board  

E-Print Network (OSTI)

The Air Resources Board (the Board or ARB) will conduct a public hearing at the time and place noted below to consider amendments to the Verifkztion

unknown authors

2003-01-01T23:59:59.000Z

114

Air Resources Board  

E-Print Network (OSTI)

The Air Resources Board (the Board or ARB) will conduct a public hearing at the time and place noted below to consider amendments to the Verification

unknown authors

2003-01-01T23:59:59.000Z

115

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...

116

Air Pollution Project: Scenario  

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

Project Summary HELP Index Summary Scenario Internet Links Student Pages SubjectContent Area: ScienceChemistry, Environment - Air Pollution Target Audience: High school chemistry...

117

Forced air fireplace furnace  

Science Conference Proceedings (OSTI)

The design of heating system for buildings including a fireplace with an open front hearth for burning firewood, a chimney extending from the upper portion of the hearth, a metal firebox being open in the front and closed on the sides and back, a plenum chamber within and surrounding the sides and back of the metal firebox and the chimney lower portion, a horizontal heat distribution chamber positioned in the building attic and communicating at one end with the plenum chamber is described. An air distribution duct connects to the other end of the air distributing chamber, the duct extending to discharge heated air to a place in the building remote from the fireplace. A fan is placed in the horizontal air distributing chamber, and a return air duct extends from selected place in the building and communicates with the plenum chamber lower portion so that the fan draws air through the return air duct, through the plenum chamber around the firebox where the air is heated, through the horizontal distribution chamber, and out through the distribution duct for circulation of the heated air within the building.

Bruce, R.W.; Gorman, R.E.

1980-10-28T23:59:59.000Z

118

Movements in air conditioning.  

E-Print Network (OSTI)

??Movements in Air Conditioning is a collection of poems that explores the obstacles inherent in creating a new sense of home in a country that (more)

Hitt, Robert D. (Robert David)

2013-01-01T23:59:59.000Z

119

Adsorption air conditioner  

DOE Patents (OSTI)

A solar powered air conditioner using the adsorption process is constructed with its components in a nested cylindrical array for compactness and ease of operation.

Rousseau, Jean L. I. (Redondo Beach, CA)

1979-01-01T23:59:59.000Z

120

Room Air Conditioners  

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

of Superefficient Room Air Conditioners year month keywords appliance energy efficiency energy efficiency incentives Market Transformation standards url https isswprod lbl gov...

Note: This page contains sample records for the topic "air density change" 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 Controls  

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

Various statutes within the Wisconsin Legislative Documents relate to air pollution control. These statutes describe zoning, permitting, and emissions regulations for hazardous and non-hazardous...

122

Linear air-fuel sensor development  

DOE Green Energy (OSTI)

The electrochemical zirconia solid electrolyte oxygen sensor, is extensively used for monitoring oxygen concentrations in various fields. They are currently utilized in automobiles to monitor the exhaust gas composition and control the air-to-fuel ratio, thus reducing harmful emission components and improving fuel economy. Zirconia oxygen sensors, are divided into two classes of devices: (1) potentiometric or logarithmic air/fuel sensors; and (2) amperometric or linear air/fuel sensors. The potentiometric sensors are ideally suited to monitor the air-to-fuel ratio close to the complete combustion stoichiometry; a value of about 14.8 to 1 parts by volume. This occurs because the oxygen concentration changes by many orders of magnitude as the air/fuel ratio is varied through the stoichiometric value. However, the potentiometric sensor is not very sensitive to changes in oxygen partial pressure away from the stoichiometric point due to the logarithmic dependence of the output voltage signal on the oxygen partial pressure. It is often advantageous to operate gasoline power piston engines with excess combustion air; this improves fuel economy and reduces hydrocarbon emissions. To maintain stable combustion away from stoichiometry, and enable engines to operate in the excess oxygen (lean burn) region several limiting-current amperometric sensors have been reported. These sensors are based on the electrochemical oxygen ion pumping of a zirconia electrolyte. They typically show reproducible limiting current plateaus with an applied voltage caused by the gas diffusion overpotential at the cathode.

Garzon, F. [Los Alamos National Lab., NM (United States); Miller, C. [General Motors, Flint, MI (United States). GM/Delphi E. Division

1996-12-14T23:59:59.000Z

123

Change-Point Detection in Meteorological Measurement  

Science Conference Proceedings (OSTI)

Statistical methods of change-point detection can be useful for discovering inhomogeneities in precipitation, air pressure, or temperature time series caused by a change in the measurement process such as a relocation of a gauge. The method is ...

Daniela Jarukov

1996-07-01T23:59:59.000Z

124

Stirling engine with air working fluid  

DOE Patents (OSTI)

A Stirling engine capable of utilizing air as a working fluid which includes a compact heat exchange module which includes heating tube units, regenerator and cooler positioned about the combustion chamber. This arrangement has the purpose and effect of allowing the construction of an efficient, high-speed, high power-density engine without the use of difficult to seal light gases as working fluids.

Corey, John A. (North Troy, NY)

1985-01-01T23:59:59.000Z

125

Recirculating electric air filter  

DOE Patents (OSTI)

An electric air filter cartridge has a cylindrical inner high voltage eleode, 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, Werner (Pleasanton, CA)

1986-01-01T23:59:59.000Z

126

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

127

Simulation model air-to-air plate heat exchanger  

Science Conference Proceedings (OSTI)

A simple simulation model of an air-to-air plate heat exchanger is presented. The model belongs to a collection of simulation models that allows the eflcient computer simulation of heating, ventilation, and air-conditioning (HVAC) systems. The main emphasis of the models is to shorten computation time and to use only input data that are known in the design process of an HVAC system. The target of the models is to describe the behavior of HVAC components in the part-load operation mode, which is becoming increasingly important in energy eficient HVAC systems. The models are intended to be used for yearly energy calculations or load calculations with time steps of about 10 minutes or larger. Short- time dynamic effects, which are of interest for different aspects of control theory, are neglected. The part-load behavior is expressed in terms of the nominal condition and the dimensionless variation of the heat transfer with change of mass flow and temperature. The effectiveness- NTU relations are used to parametrize the convective heat transfer at nominal conditions and to compute the part-load condition. If the heat transfer coefficients on the two exchanger sides are not equal (i. e. due to partial bypassing of air), their ratio can be easily calculated and set as a parameter. The model is static and uses explicit equations only. The explicit model formulation ensures short computation time and numerical stability, which allows using the model with sophisticated engineering methods like automatic system optimization. This paper fully outlines the algorithm description and its simplifications. It is not tailored for any particular simulation program to ensure easy implementation in any simulation program.

Wetter, Michael

1999-01-01T23:59:59.000Z

128

Density | OpenEI  

Open Energy Info (EERE)

Density Density Dataset Summary Description This dataset is part of a larger internal dataset at the National Renewable Energy Laboratory (NREL) that explores various characteristics of large solar electric (both PV and CSP) facilities around the United States. This dataset focuses on the land use characteristics for solar facilities that are either under construction or currently in operation. Source Land-Use Requirements for Solar Power Plants in the United States Date Released June 25th, 2013 (5 months ago) Date Updated Unknown Keywords acres area average concentrating solar power csp Density electric hectares km2 land land requirements land use land-use mean photovoltaic photovoltaics PV solar statistics Data application/vnd.openxmlformats-officedocument.spreadsheetml.sheet icon Master Solar Land Use Spreadsheet (xlsx, 1.5 MiB)

129

Single-Nucleon Densities  

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

Densities Densities This web page presents single-nucleon densities calculated for a variety of nuclei in the range A=2-10 with some preliminary results for A=11,12. These are from variational Monte Carlo calculations (VMC) using the Argonne v18 two-nucleon and Urbana X three-nucleon potentials (AV18+UX). (Urbana X is intermediate between the Urbana IX and Illinois-7 models; it has the form of UIX supplemented with a two-pion S-wave piece, while the strengths of its terms are taken from the IL7 model. It does NOT have the three-pion-ring term of IL7.) These VMC wave functions are the starting trial functions for a number of recent Green's function Monte Carlo (GFMC) calculations: Brida, et al., Phys. Rev. C 84, 024319 (2011); McCutchan, et al., Phys. Rev. C 86, 024315 (2012);

130

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.

131

Aerodynamic effects on fuel spray characteristics: Air-assist atomizer  

SciTech Connect

Results are presented on the internal structure of a kerosene fuel spray, generated with an air-assist type nozzle. Effects of atomization air flow rate and combustion air swirl on droplet transport processes have been investigated. Spatially-resolved measurements have been obtained on mean droplet size, number density and velocity, at different combustion air swirl and atomization air flow rates. An ensemble light scattering technique, based on measurement of the polarization ratio, and laser velocimetry have been used for these measurements. The results indicate that as atomization air flow rate increases, the spray becomes confined to a narrower spray angle; in addition, mean droplet size decreases and number density increases significantly along the spray centerline. Larger droplets are found generally on the spray boundary, and smaller ones near the spray centerline. In all cases, there is a gradual increase in mean droplet size along the spray centerline with axial distance. Under burning conditions the flame plume becomes short and intense, with fewer droplets penetrating through the flame envelope. Combustion air swirl and atomization air have a significant effect on the transport of droplets and on combustion characteristics of spray flames. 20 refs., 9 figs.

Presser, C.; Semerjian, H.G.; Gupta, A.K.

1988-01-01T23:59:59.000Z

132

Multiple density layered insulator  

DOE Patents (OSTI)

A multiple density layered insulator for use with a laser is disclosed which provides at least two different insulation materials for a laser discharge tube, where the two insulation materials have different thermoconductivities. The multiple layer insulation materials provide for improved thermoconductivity capability for improved laser operation. 4 figs.

Alger, T.W.

1994-09-06T23:59:59.000Z

133

Multiple density layered insulator  

DOE Patents (OSTI)

A multiple density layered insulator for use with a laser is disclosed wh provides at least two different insulation materials for a laser discharge tube, where the two insulation materials have different thermoconductivities. The multiple layer insulation materials provide for improved thermoconductivity capability for improved laser operation.

Alger, Terry W. (Tracy, CA)

1994-01-01T23:59:59.000Z

134

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...

135

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

Open Energy Info (EERE)

DEEP Air Management Department Department of Energy and Environmental Protection Division Environmental Protection Division; Bureau of Air Management Address 79 Elm Street Place...

136

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

137

Detonation cell size measurements in H/sub 2/-air-H/sub 2/O mixtures  

DOE Green Energy (OSTI)

Conclusions of this study are: (1) For H/sub 2/-air mixtures at 20/sup 0/C and a total pressure of 101 kPa, detonations have been achieved between 13.5% and 70% H/sub 2/ mole fraction. This compositional range is wider than the detonability limits previously reported for smaller tubes. (2) The addition of CO/sub 2/ to H/sub 2/-air mixtures greatly reduces the detonability of the mixture. (3) For a given initial temperature, air density and equivalence ratio, the addition of steam to a H/sub 2/-Air mixture greatly decreases the detonability of the mixture. (4) At 100/sup 0/C and an air density of 41.6 moles/m/sup 3/, detonation of H/sub 2/-air mixtures with up to 30% steam have been recorded. (5) For H/sub 2/-air mixtures, the detonability increases with increasing initial temperature at constant density. Consequently, the diluent effect of the addition of steam to a fixed volume of an H/sub 2/-air mixture in reducing detonability is partially offset if there is a concomitant temperature increase. (6) At 100/sup 0/C and an air density of 41.6 moles/m/sup 3/, a 13.0% H/sub 2/-air mixture has been detonated. 18 refs., 7 figs.

Tieszen, S.R.; Sherman, M.P.; Benedick, W.B.; Shepherd, J.E.; Knystautas, R.; Lee, J.H.

1985-01-01T23:59:59.000Z

138

Air Shower Simulations  

SciTech Connect

Air shower simulations are a vital part of the design of air shower experiments and the analysis of their data. We describe the basic features of air showers and explain why numerical simulations are the appropriate approach to model the shower simulation. The CORSIKA program, the standard simulation program in this field, is introduced and its features, performance and limitations are discussed. The basic principles of hadronic interaction models and some gerneral simulation techniques are explained. Also a brief introduction to the installation and use of CORSIKA is given.

Alania, Marco; Gomez, Adolfo V. Chamorro [Centro de Tecnologias de Informacion y Comunicaciones, Universidad Nacional de Ingenieria, Lima (Peru); Araya, Ignacio J. [Departamento de Astronomia y Astrofisica, Pontificia Universidad Catolica de Chile, Av. Vicuna Mackenna 4860, Santiago (Chile); Huerta, Humberto Martinez; Flores, Alejandra Parra [Facultad de Ciencias Fisico Matematicas, Benemerita Universidad Autonoma de Puebla, Puebla (Mexico); Knapp, Johannes [School of Physics and Astronomy, University of Leeds, Leeds LS2 9JT (United Kingdom)

2009-04-30T23:59:59.000Z

139

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

140

Simulation of air and mist drilling for geothermal wells  

SciTech Connect

An improved method for calculating downhole temperatures, pressures, fluid densities and velocities during air drilling has been developed. The basic equations of fluid flow for a gas with cuttings and mist are presented along with a numerical method for their solution. Several applications of this calculational method are given, showing the effect of flow rate and standpipe pressures in typical air and mist drilling situations. 8 refs.

Mitchell, R.F.

1981-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "air density change" 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

AirCore: An Innovative Atmospheric Sampling System  

Science Conference Proceedings (OSTI)

This work describes the AirCore, a simple and innovative atmospheric sampling system. The AirCore used in this study is a 150-m-long stainless steel tube, open at one end and closed at the other, that relies on positive changes in ambient ...

Anna Karion; Colm Sweeney; Pieter Tans; Timothy Newberger

2010-11-01T23:59:59.000Z

142

Air Carrier Flight Operations  

E-Print Network (OSTI)

Most air carriers operate under a system of prioritized goals including safety, customer service (on-time departures and arrivals) and operating economics. The flight operations department is responsible for the safe and ...

Midkif, Alan H.

143

AIR RESOURCES BOARD Acknowledgements  

E-Print Network (OSTI)

This report was prepared with the assistance and support from other agencies, divisions and offices of the Air Resources Board, and private firms. Staff would especially like to thank the following individuals for their assistance in developing this proposed pathway:

Green Wastes; Green Wastes; Richard Corey; Deputy Executive Officer; Cynthia Marvin Chief; Michael Waugh Chief; Kamal Ahuja; Brian Helmowski; Wes Ingram; Ray Asregadoo (arb; Juliet Bohn (hwma; Richard Boyd (arb; Alicia Chakrabarthy (ebmud; Steven Cliff (arb; Kevin Dickison (ebmud; Jacques Franco (calrecycle

2012-01-01T23:59:59.000Z

144

Breathing zone air sampler  

DOE Patents (OSTI)

A sampling apparatus is provided which comprises a sampler for sampling air in the breathing zone of a wearer of the apparatus and a support for the sampler preferably in the form of a pair of eyeglasses. The sampler comprises a sampling assembly supported on the frame of the eyeglasses and including a pair of sample transport tubes which are suspended, in use, centrally of the frame so as to be disposed on opposite sides of the nose of the wearer and which each include an inlet therein that, in use, is disposed adjacent to a respective nostril of the nose of the wearer. A filter holder connected to sample transport tubes supports a removable filter for filtering out particulate material in the air sampled by the apparatus. The sample apparatus is connected to a pump for drawing air into the apparatus through the tube inlets so that the air passes through the filter.

Tobin, John (Bethel Park, PA)

1989-01-01T23:59:59.000Z

145

air_water.cdr  

Office of Legacy Management (LM)

Office of Legacy Management Weldon Spring Site Air and Water Monitoring 32008 This fact sheet provides information at Weldon Spring, Missouri. This site is managed by the U.S....

146

Air Handling Unit Supply Air Temperature Optimization During Economizer Cycles  

E-Print Network (OSTI)

Most air handling units (AHUs) in commercial buildings have an air economizer cycle for free cooling under certain outside air conditions. During the economizer cycle, the outside air and return air dampers are modulated to seek mixing air temperature at supply air temperature setpoint. Mechanical cooling is always required when outside air temperature is higher than the supply air temperature setpoint. Generally the supply air temperature setpoint is set at 55F for space humidity control. Actually the dehumidification is not necessary when outside air dew point is less than 55F. Meanwhile the space may have less cooling load due to envelope heat loss and/or occupant schedule. These provide an opportunity to use higher supply air temperature to reduce or eliminate mechanical cooling and terminal box reheat. On the other hand the higher supply air temperature will require higher air flow as well as higher fan power. Therefore the supply air temperature has to be optimized to minimize the combined energy for fan, cooling and heating energy. In this paper a simple energy consumption model is established for AHU systems during the economizer and then a optimal supply air temperature control is developed to minimize the total cost of the mechanical cooling and the fan motor power. This paper presents AHU system energy modeling, supply air temperature optimization, and simulated energy savings.

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

2007-01-01T23:59:59.000Z

147

Air Quality | Open Energy Information  

Open Energy Info (EERE)

Air Quality Jump to: navigation, search Retrieved from "http:en.openei.orgwindex.php?titleAirQuality&oldid612070" Category: NEPA Resources...

148

FREE AIR PRESSURE MEASUREMENTS  

SciTech Connect

Indenter gages, Wiancko gages, and interferometer gages were used to measure air overpressure vs time at essentially ground level stations for both the surface (S) and undprground (U) atomic explosions. For the S Burst several instruments were placed on a line extending from an overpressure region of 13 psi to a region of less than one psi. The air measurements for the U Burst ranged from 32 to 2 psi. (D. L.G.)

Howard, W.J.; Jones, R.D.

1952-02-19T23:59:59.000Z

149

A New Definition of the Virtual Temperature, Valid for the Atmosphere and the CO2-Rich Air of the Vadose Zone  

Science Conference Proceedings (OSTI)

In speleological environments, partial pressures of carbon dioxide (CO2) are often large enough to affect overall air density. Excluding this gas when defining the gas constant for air, a new definition is proposed for the virtual temperature T? ...

Andrew S. Kowalski; Enrique Prez Snchez-Caete

2010-08-01T23:59:59.000Z

150

Air Pollution Health Effects: Toward an Integrated Assessment  

E-Print Network (OSTI)

Scientists and policy makers have become increasingly aware of the need to jointly study climate change and air pollution because of the interactions among policy measures and in the atmospheric chemistry that creates the ...

Yang, Trent.

151

The Diesel Paradox: Why Dieselization Will Lead to Cleaner Air  

DOE Green Energy (OSTI)

There are challenges facing the U.S. and the world that are brought on by the growing demand for transporting people and goods. These include the growing consumption of petroleum, urban air pollution, and global climate change.

Eberhardt, James J.

2000-08-20T23:59:59.000Z

152

Studies of Urban Climates and Air Pollution in Switzerland  

Science Conference Proceedings (OSTI)

In addition to an assessment of the factors that are responsible for urban climate change, this paper describes climatological studies and peculiarities of some Swiss cities. Although these cities are small, urban air pollution presents a real ...

Heinz Wanner; Jacques-Andr Hertig

1984-12-01T23:59:59.000Z

153

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

154

InAir: sharing indoor air quality measurements and visualizations  

Science Conference Proceedings (OSTI)

This paper describes inAir, a tool for sharing measurements and visualizations of indoor air quality within one's social network. Poor indoor air quality is difficult for humans to detect through sight and smell alone and can contribute to the development ... Keywords: air quality, domestic technology, environment, health, iphone, persuasive technology, sensors, sustainability

Sunyoung Kim; Eric Paulos

2010-04-01T23:59:59.000Z

155

Global Atmospheric Pollution Forum Air Pollutant Emission Inventory | Open  

Open Energy Info (EERE)

Global Atmospheric Pollution Forum Air Pollutant Emission Inventory Global Atmospheric Pollution Forum Air Pollutant Emission Inventory Jump to: navigation, search Tool Summary Name: Global Atmospheric Pollution (GAP) Forum Air Pollutant Emission Inventory Agency/Company /Organization: BOC foundation, U.S. Environment Protection Agency (EPA) and Swedish International Development Cooperation Agency (SIDA) Complexity/Ease of Use: Moderate Website: sei-international.org/rapidc/gapforum/html/emissions-manual.php Cost: Free Related Tools Global Atmospheric Pollution Forum Air Pollutant Emission Inventory World Induced Technical Change Hybrid (WITCH) Energy Development Index (EDI) ... further results Find Another Tool FIND DEVELOPMENT IMPACTS ASSESSMENT TOOLS A manual that provides formulation of methods and assessment of good

156

Muon Bremsstrahlung and Muonic Pair Production in Air Showers  

E-Print Network (OSTI)

The objective of this work is to report on the modifications in air shower development due to muon bremsstrahlung and muonic pair production. In order to do that we have implemented new muon bremsstrahlung and muonic pair production procedures in the AIRES air shower simulation system, and have used it to simulate ultra high energy showers in different conditions. The influence of the mentioned processes in the global development of the air shower is important for primary particles of large zenith angles, while they do not introduce significant changes in the position of the shower maximum.

A. Cillis; S. J. Sciutto

2000-06-08T23:59:59.000Z

157

Undulator Hall Air Temperature Fault Scenarios  

SciTech Connect

Recent experience indicates that the LCLS undulator segments must not, at any time following tuning, be allowed to change temperature by more than about {+-}2.5 C or the magnetic center will irreversibly shift outside of acceptable tolerances. This vulnerability raises a concern that under fault conditions the ambient temperature in the Undulator Hall might go outside of the safe range and potentially could require removal and retuning of all the segments. In this note we estimate changes that can be expected in the Undulator Hall air temperature for three fault scenarios: (1) System-wide power failure; (2) Heating Ventilation and Air Conditioning (HVAC) system shutdown; and (3) HVAC system temperature regulation fault. We find that for either a system-wide power failure or an HVAC system shutdown (with the technical equipment left on), the short-term temperature changes of the air would be modest due to the ability of the walls and floor to act as a heat ballast. No action would be needed to protect the undulator system in the event of a system-wide power failure. Some action to adjust the heat balance, in the case of the HVAC power failure with the equipment left on, might be desirable but is not required. On the other hand, a temperature regulation failure of the HVAC system can quickly cause large excursions in air temperature and prompt action would be required to avoid damage to the undulator system.

Sevilla, J.

2010-11-17T23:59:59.000Z

158

Impact of Air Emissions Controls on Coal Combustion Products  

Science Conference Proceedings (OSTI)

Coal combustion products (CCPs) have been extensively studied and well characterized over the last 30 years. However, new air emissions control technologies at power plants will change the characteristics of some existing CCPs. These changes may affect the selection of appropriate management methods for high-volume CCPs with respect to both disposal and use. This report examines evolving air emissions controls and their likely impact on CCPs.

2008-10-15T23:59:59.000Z

159

ISOTHERMAL AIR-INGRESS VALIDATION EXPERIMENTS  

Science Conference Proceedings (OSTI)

Idaho National Laboratory has conducted airingress experiments as part of a campaign to validate computational fluid dynamics (CFD) calculations for very high-temperature gas-cooled reactor (VHTR) analysis. An isothermal test loop was designed to recreate exchange or stratified flow that occurs in the lower plenum of VHTR after a break in the primary loop allows helium to leak out and reactor building air to enter the reactor core. The experiment was designed to measure stratified flow in the inlet pipe connecting to the lower plenum of the General Atomics gas turbinemodular helium reactor (GT-MHR). Instead of helium and air, brine and sucrose were used as heavy fluids, and water was used as the lighter fluid to create, using scaling laws, the appropriate flow characteristics of the lower plenum immediately after depressurization. These results clearly indicate that stratified flow is established even for very small density differences. Corresponding CFD results were validated with the experimental data. A grid sensitivity study on CFD models was also performed using the Richardson extrapolation and the grid convergence index method for the numerical accuracy of CFD calculations. The calculated current speed showed very good agreement with the experimental data, indicating that current CFD methods are suitable for simulating density gradient stratified flow phenomena in an air-ingress accident.

Chang H. Oh; Eung S. Kim

2013-01-01T23:59:59.000Z

160

High Energy Density Capacitors  

SciTech Connect

BEEST Project: Recapping is developing a capacitor that could rival the energy storage potential and price of todays best EV batteries. When power is needed, the capacitor rapidly releases its stored energy, similar to lightning being discharged from a cloud. Capacitors are an ideal substitute for batteries if their energy storage capacity can be improved. Recapping is addressing storage capacity by experimenting with the material that separates the positive and negative electrodes of its capacitors. These separators could significantly improve the energy density of electrochemical devices.

None

2010-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "air density change" 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

Improving air handler efficiency in residential HVAC applications  

SciTech Connect

In continuing the development of energy efficiency standards, consideration has turned to air handlers used for heating and air conditioning of consumer residences. These air handlers have typical efficiencies of about 10% to 15% due to poor electric motor performance and aerodynamically poor fans and fan housings. This study was undertaken to examine some of these performance issues, under carefully controlled laboratory conditions, to support potential regulatory changes. In addition, this study examined the performance of a prototype air handler fan assembly that offers the potential for substantial increases in performance. This prototype and a standard production fan were tested in a full-scale duct system and test chamber at LBNL which was specifically designed for testing heating, ventilation, and air conditioning systems. The laboratory tests compared efficiency, total airflow, sensitivity to duct system flow resistance, and the effects of installation in a smaller cabinet. The test results showed that, averaged over a wide range of operating conditions, the prototype air handler had about twice the efficiency of the standard air handler and was less sensitive to duct system flow resistance changes. The performance of both air handlers was significantly reduced by reducing the space between the air handler and the cabinet it was installed in. Therefore any fan rating needs to be performed using the actual cabinet it will be used in.

Walker, Iain S.; Mingee, Michael D.; Brenner, Douglas E.

2003-08-01T23:59:59.000Z

162

Compressed Air System Maintenance Guide  

Science Conference Proceedings (OSTI)

The "Compressed Air System Maintenance Guide" provides fossil plant personnel with information on the operation and maintenance of the compressed air system. The contents of this guide will assist personnel in improving performance of the compressed air system, reducing maintenance costs, and increasing air system reliability.

2002-11-27T23:59:59.000Z

163

Solar Buildings: Transpired Air Collectors  

DOE Green Energy (OSTI)

Transpired air collectors preheat building ventilation air by using the building's ventilation fan to draw fresh air through the system. The intake air is heated as it passes through the perforated absorber plate and up the plenum between the absorber and the south wall of the building. Reduced heating costs will pay for the systems in 3--12 years.

NONE

1998-11-24T23:59:59.000Z

164

Compressed Air Energy Storage (CAES) | Open Energy Information  

Open Energy Info (EERE)

source source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Page Edit History Facebook icon Twitter icon » Compressed Air Energy Storage (CAES) Jump to: navigation, search Contents 1 Introduction 2 Technology Description 3 Plants 4 References Introduction Compressed air energy storage (CAES) is a way to store energy that is generated at night and deliver the energy during the day to meet peak demand. This is performed by compressing air and storing it during periods of excess electricity and expanding the air through a turbine when electricity is needed. Technology Description Diabatic Diabatic compressed air energy storage is what the two existing compressed air energy storage facilities currently employ. This method is

165

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

166

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

167

AIR COOLED NEUTRONIC REACTOR  

DOE Patents (OSTI)

A nuclear reactor of the air-cooled, graphite moderated type is described. The active core consists of a cubicle mass of graphite, approximately 25 feet in each dimension, having horizontal channels of square cross section extending between two of the opposite faces, a plurality of cylindrical uranium slugs disposed in end to end abutting relationship within said channels providing a space in the channels through which air may be circulated, and a cadmium control rod extending within a channel provided in the moderator. Suitable shielding is provlded around the core, as are also provided a fuel element loading and discharge means, and a means to circulate air through the coolant channels through the fuel charels to cool the reactor.

Fermi, E.; Szilard, L.

1958-05-27T23:59:59.000Z

168

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

169

Inverter Controlled Screw Air Compressor Manufacturers ...  

U.S. Energy Information Administration (EIA)

Inverter Controlled Screw Air Compressor, Inverter Controlled Screw Air Compressor Manufacturers & Suppliers Directory - Find here Inverter ...

170

Solar air collector  

SciTech Connect

A solar heating system including a radiant heat collector apparatus made up of an enclosure having glazed panels. The collector provided within the enclosure is upstanding with the enclosure and the collector has heat absorbent flat walls spaced inwardly from the glazed panels. A heat storage core is provided centrally within the collector and spaced from the walls of the collector. The heat storage core includes an insulated housing and a heat retaining member within the insulated housing. Air passageways are formed between the collector walls and the insulated housing for passing input air, and duct members are provided for communicating with a household.

Deschenes, D.; Misrahi, E.

1981-12-15T23:59:59.000Z

171

Single-Duct Constant Air Volume System Supply Air Temperature Reset: Using Return Air Temperature or Outside Air Temperature?  

E-Print Network (OSTI)

The supply air temperature set point for a singleduct constant air volume air handling unit (AHU) system is often reset based on either return air temperature or outside air temperature in order to reduce simultaneous cooling and heating energy consumption. Both reset strategies make engineering sense as long as the reset schedules are reasonable. Quite often the decision to use one over the other is made with the assumption that they will all achieve some sorts of energy savings. However, the impact of these two strategies on AHU energy consumption could be very different. A comparison of these two commonly used supply air temperature reset strategies for a single-duct constant air volume system is presented in this paper. It is shown that from either the building energy consumption or building comfort point of view, the reset strategy based on outside air temperature is inherently better than that based on return air temperature. Significant amount of heating energy savings can be achieved by switching from return air temperature based reset to outside air temperature based reset. The reset strategy can also benefit variable air volume (VAV) AHUs. An improved supply air temperature set point reset control strategy is proposed by combining and staging the outside air and return air temperature based resets.

Wei, G.; Turner, W. D.; Claridge, D.; Liu, M.

2002-01-01T23:59:59.000Z

172

Freight mode choice : air transport versus ocean transport in the 1990's  

E-Print Network (OSTI)

Value density is often considered when considering the choice whether to ship cargo by air or by water. However, although cargo value is directly linked to the overall cost of shipment, it is the deciding factor in mode ...

Lewis, Dale B.

1994-01-01T23:59:59.000Z

173

Charge Density Wave Compounds  

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

Fisher Research Group Fisher Research Group Layered Chalcogenides 29 February 2008 Controlling the Wave by Brad Plummer, SLAC Communications Stanford University researchers working in part at SSRL have discovered a novel set of properties pertaining to a compound of materials called tritellurides. These compounds, composed of three atoms of tellurium and a single atom of one of the rare earth elements, demonstrate unique electronic properties that can be controlled by altering the temperature of the material. The tritellurides display phenomena known as charge density waves (CDW). In a normal conductive metal, electrons persist in a "sea" wherein they are evenly distributed and equally available, or conductive. A CDW occurs under certain circumstances and causes the electrons to clump together, lowering their availability, and thereby lowering the compound's conductivity. Tellurium, when crystallized into quasi-two-dimensional planes and combined with rare earth elements, produces a material with CDWs that can be manipulated and controlled.

174

Low density microcellular foams  

DOE Patents (OSTI)

Disclosed is a process of producing microcellular from which comprises the steps of: (a) selecting a multifunctional epoxy oligomer resin; (b) mixing said epoxy resin with a non-reactive diluent to form a resin-diluent mixture; (c) forming a diluent containing cross-linked epoxy gel from said resin-diluent mixture; (d) replacing said diluent with a solvent therefore; (e) replacing said solvent with liquid carbon dioxide; and (f) vaporizing off said liquid carbon dioxide under supercritical conditions, whereby a foam having a density in the range of 35-150 mg/cc and cell diameters less than about 1 .mu.m is produced. Also disclosed are the foams produced by the process.

LeMay, James D. (Castro Valley, CA)

1992-01-01T23:59:59.000Z

175

Low density microcellular foams  

DOE Patents (OSTI)

Disclosed is a process of producing microcellular foam which comprises the steps of: (a) selecting a multifunctional epoxy oligomer resin; (b) mixing said epoxy resin with a non-reactive diluent to form a resin-diluent mixture; (c) forming a diluent containing cross-linked epoxy gel from said resin-diluent mixture; (d) replacing said diluent with a solvent therefore; (e) replacing said solvent with liquid carbon dioxide; and (f) vaporizing off said liquid carbon dioxide under supercritical conditions, whereby a foam having a density in the range of 35-150 mg/cc and cell diameters less than about 1 .mu.m is produced. Also disclosed are the foams produced by the process.

LeMay, James D. (Castro Valley, CA)

1991-01-01T23:59:59.000Z

176

Density Coordinate Mixed Layer Models  

Science Conference Proceedings (OSTI)

The development of mixed layer models in so-called density coordinates is discussed. Density coordinates, or isopycnal coordinates as they are sometimes called, are becoming increasingly popular for use in ocean models due to their highly ...

William K. Dewar

2001-02-01T23:59:59.000Z

177

Hexane Air Combustion  

E-Print Network (OSTI)

Hot surface ignition and subsequent flame propagation of premixed n-hexane air mixtures are shown in this fluid dynamics video. High speed schlieren photography revealed 3 distinct behaviors of ignition and propagation as a function of mixture composition and initial pressure.

Boettcher, Philipp A; Shepherd, Joseph E

2010-01-01T23:59:59.000Z

178

Air-cleaning apparatus  

SciTech Connect

An air-cleaning, heat-exchange apparatus includes a main housing portion connected by means of an air inlet fan to the kitchen exhaust stack of a restaurant. The apparatus includes a plurality of heat exchangers through which a heat-absorptive fluid is circulated, simultaneously, by means of a suitable fluid pump. These heat exchangers absorb heat from the hot exhaust gas, out of the exhaust stack of the restaurant, which flows over and through these heat exchangers and transfers this heat to the circulating fluid which communicates with remote heat exchangers. These remote heat exchangers further transfer this heat to a stream of air, such as that from a cold-air return duct for supplementing the conventional heating system of the restaurant. Due to the fact that such hot exhaust gas is heavily grease laden , grease will be deposited on virtually all internal surfaces of the apparatus which this exhaust gas contacts. Consequently, means are provided for spraying these contacted internal surfaces , as well as the hot exhaust gas itself, with a detergent solution in which the grease is soluble, thereby removing grease buildup from these internal surfaces.

Howard, A.G.

1981-08-18T23:59:59.000Z

179

Winter Morning Air Temperature  

Science Conference Proceedings (OSTI)

Results of temperature measurements, which may be applied to inference of winter temperatures in data-sparse areas, are presented. The morning air temperatures during three winters were measured at 80 places in a 10 km 30 km area along the ...

A. Hogan; M. Ferrick

1997-01-01T23:59:59.000Z

180

Air Proportional Counter  

DOE Patents (OSTI)

A multiple wire counter utilizing air at atmospheric pressure as the ionizing medium and having a window of a nylon sheet of less than 0.5 mil thickness coated with graphite. The window is permeable to alpha particles so that the counter is well adapted to surveying sources of alpha radiation.

Simpson, J.A. Jr.

1950-10-31T23:59:59.000Z

Note: This page contains sample records for the topic "air density change" 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

Microwave scattering from laser spark in air  

Science Conference Proceedings (OSTI)

In this paper, microwave Mie scattering from a laser-induced plasma in atmospheric air is computed. It shows that the scattered microwave transitions from coherent Rayleigh scattering to Mie scattering based on the relative transparency of the laser-induced plasma at the microwave frequency. The microwave penetration in the plasma alters from total transparency to partial shielding due to the sharp increase of the electron number density within the avalanche ionization phase. The transition from Rayleigh scattering to Mie scattering is verified by both the temporal evolution of the scattered microwave and the homogeneity of polar scattering plots.

Sawyer, Jordan; Zhang Zhili [Mechanical, Aerospace and Biomedical Engineering, University of Tennessee, Knoxville, Tennessee 37996 (United States); Shneider, Mikhail N. [Mechanical and Aerospace Engineering, Princeton University, Princeton, New Jersey 08544 (United States)

2012-09-15T23:59:59.000Z

182

Effects of dry bulk density and particle size fraction on gas transport parameters in variably saturated landfill cover soil  

SciTech Connect

Highlights: > The effects of soil physical properties on gas transport parameters were investigated. > Higher values of D{sub p} and k{sub a} exhibited in the '+gravel' than the '-gravel' fraction at same soil-air content ({epsilon}). > Recent power law models for D{sub p} (WLR) and k{sub a} (RPL) were modified. > Model parameters were linearly related to easily measurable dry bulk density ({rho}{sub b}). - Abstract: Landfill sites are emerging in climate change scenarios as a significant source of greenhouse gases. The compacted final soil cover at landfill sites plays a vital role for the emission, fate and transport of landfill gases. This study investigated the effects of dry bulk density, {rho}{sub b}, and particle size fraction on the main soil-gas transport parameters - soil-gas diffusivity (D{sub p}/D{sub o}, ratio of gas diffusion coefficients in soil and free air) and air permeability (k{sub a}) - under variably-saturated moisture conditions. Soil samples were prepared by three different compaction methods (Standard and Modified Proctor compaction, and hand compaction) with resulting {rho}{sub b} values ranging from 1.40 to 2.10 g cm{sup -3}. Results showed that D{sub p} and k{sub a} values for the '+gravel' fraction (<35 mm) became larger than for the '-gravel' fraction (<2 mm) under variably-saturated conditions for a given soil-air content ({epsilon}), likely due to enhanced gas diffusion and advection through less tortuous, large-pore networks. The effect of dry bulk density on D{sub p} and k{sub a} was most pronounced for the '+gravel' fraction. Normalized ratios were introduced for all soil-gas parameters: (i) for gas diffusivity D{sub p}/D{sub f}, the ratio of measured D{sub p} to D{sub p} in total porosity (f), (ii) for air permeability k{sub a}/k{sub a,pF4.1}, the ratio of measured k{sub a} to k{sub a} at 1235 kPa matric potential (=pF 4.1), and (iii) for soil-air content, the ratio of soil-air content ({epsilon}) to total porosity (f) (air saturation). Based on the normalized parameters, predictive power-law models for D{sub p}({epsilon}/f) and k{sub a}({epsilon}/f) models were developed based on a single parameter (water blockage factor M for D{sub p} and P for k{sub a}). The water blockage factors, M and P, were found to be linearly correlated to {rho}{sub b} values, and the effects of dry bulk density on D{sub p} and k{sub a} for both '+gravel' and '-gravel' fractions were well accounted for by the new models.

Wickramarachchi, Praneeth, E-mail: praneeth1977@yahoo.co.uk [Graduate School of Science and Engineering, Saitama University, 255 Shimo-Okubo, Sakura-ku, Saitama 338-8570 (Japan); Kawamoto, Ken; Hamamoto, Shoichiro [Graduate School of Science and Engineering, Saitama University, 255 Shimo-Okubo, Sakura-ku, Saitama 338-8570 (Japan); Institute for Environmental Science and Technology, Saitama University, 255 Shimo-Okubo, Sakura-ku, Saitama 338-8570 (Japan); Nagamori, Masanao [Center for Environmental Science in Saitama, 914 Kamitanadare, Kazo, Saitama 347-0115 (Japan); Moldrup, Per [Environmental Engineering Section, Dept. of Biotechnology, Chemistry and Environmental Engineering, Aalborg University, Sohngaardsholmsvej 57, DK-9000 Aalborg (Denmark); Komatsu, Toshiko [Graduate School of Science and Engineering, Saitama University, 255 Shimo-Okubo, Sakura-ku, Saitama 338-8570 (Japan); Institute for Environmental Science and Technology, Saitama University, 255 Shimo-Okubo, Sakura-ku, Saitama 338-8570 (Japan)

2011-12-15T23:59:59.000Z

183

GHPs Save Heating Cost and Improve Air Quality in Poultry Farm  

E-Print Network (OSTI)

: 40-50' wide, 400-500' length § Bird density: 1 square foot/bird, 20,000 birds1 GHPs Save Heating Cost and Improve Air Quality in Poultry Farm per house § Heating and cooling required § Intensive ventilation to maintain air

184

Air-flow regulation system for a coal gasifier  

DOE Patents (OSTI)

An improved air-flow regulator for a fixed-bed coal gasifier is provided which allows close air-flow regulation from a compressor source even though the pressure variations are too rapid for a single primary control loop to respond. The improved system includes a primary controller to control a valve in the main (large) air supply line to regulate large slow changes in flow. A secondary controller is used to control a smaller, faster acting valve in a secondary (small) air supply line parallel to the main line valve to regulate rapid cyclic deviations in air flow. A low-pass filter with a time constant of from 20 to 50 seconds couples the output of the secondary controller to the input of the primary controller so that the primary controller only responds to slow changes in the air-flow rate, the faster, cyclic deviations in flow rate sensed and corrected by the secondary controller loop do not reach the primary controller due to the high frequency rejection provided by the filter. This control arrangement provides at least a factor of 5 improvement in air-flow regulation for a coal gasifier in which air is supplied by a reciprocating compressor through a surge tank.

Fasching, George E. (Morgantown, WV)

1984-01-01T23:59:59.000Z

185

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...

186

High performance metal/air fuel cells. Part 1. General review. [Li, Al, Ca, Cd, Mg  

SciTech Connect

Metal/air fuel cells are reviewed in terms of their potential application in electric vehicles. Attention is focused on those metals (light alkali and alkaline earth metals, and aluminum) which, in combination with oxygen, have theoretical energy densities (2--13 kWh/kg-metal) exceeding that of gasoline (utilized in automobiles at 2--3 kWh/kg). Lithium and aluminum have yielded 8- and 4 kWh/kg, respectively, in laboratory experimental cells. The slurry Zn/air system achieves 0.85 kWh/kg-Zn in prototype vehicle cells and is reviewed for comparison. Calcium can probably yield 1.8 kWh/kg-Ca, but its potential as a fuel has not yet been fully explored. The remaining metals appear to be unsuitable for use in aqueous electrolyte fuel cells. The discharge characteristics of lithium, aluminum, and (possibly) calcium/air cells indicate the potential for electric vehicles of the highway performance and minimum range (300 miles) of subcompact automobiles, rapid refueling for unlimited range extension, and the storage in the fuel cell of sufficient metal for ranges in excess of 1000 miles. Barriers to the concept are the economic necessity of recycling cell reaction products (except in the case of calcium), the expansion or creation of vast metal production industries, and the change-over of existing service station infrastructures to allow electric vehicle servicing. The energy efficiency of a transportation system using aluminum was estimated using data on the current aluminum production industry. The total estimated cost of ownership and operation of an aluminum/air cell was 3.0--3.6 cents/km. The relative rarity of lithium would complicate its use. 6 tables.

Cooper, J. F.

1977-08-15T23:59:59.000Z

187

AVIC Changli Union Energy | Open Energy Information  

Open Energy Info (EERE)

Beijing Municipality, China Product China-based JV to manufacture and sell zinc-air batteries. References AVIC Changli Union Energy1 LinkedIn Connections CrunchBase Profile No...

188

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

189

Judging Air Quality Model Performance  

Science Conference Proceedings (OSTI)

Under the direction of the AMS Steering Committee for the EPA Cooperative Agreement on air quality modeling, a small group of scientists was convened to review and recommend procedures to evaluate the performance of air quality models. Particular ...

Douglas G. Fox

1981-05-01T23:59:59.000Z

190

Oil and Gas Air Heaters  

E-Print Network (OSTI)

Most conventional air heaters adopt indirect heat transfer, which uses combustion gases to indirectly heat fresh air by heating surfaces to generate hot air used for material drying and dehumidification. We call them indirect air heaters. However, they have a higher manufacturing cost and lower thermal efficiency, especially when high temperature air is needed. For this reason, a direct air heater applicable for or feed and industrial raw products is put forward, which has advantages such as less production cost, smaller dimensions and higher thermal efficiency. Their design, working principles, characteristics, structure and applications are presented in this article, and brief comparisons are made between the indirect and direct air heater. Finally, the relation of hot-air temperature, oil or gas consumption and fresh airflow is determined based on energy equilibrium.

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

2006-01-01T23:59:59.000Z

191

Computer controlled air conditioning systems  

SciTech Connect

This patent describes an improvement in a computer controlled air conditioning system providing for circulation of air through an air conditioned house in contact with concrete walls requiring a humidity within a critical range. The improvement consists of: a computer for processing sensed environmental input data including humidity and oxygen to produce output control signals for affecting the humidity of the air in the house; provision for an air flow circulation path through the house in contact with the concrete walls; sensing responsive to the amount of oxygen in the house for providing input signals to the computer; mixing for combining with the air in the house a variable amount of fresh atmospheric air to supply fresh oxygen; and humidity modifying means for modifying the humidity of the air flowing in the flow path responsive to the control signals.

Dumbeck, R.F.

1986-02-04T23:59:59.000Z

192

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...

193

Uncertainty in Air Quality Modeling  

Science Conference Proceedings (OSTI)

Under the direction of the AMS Steering Committee for the EPA Cooperative Agreement on Air Quality Modeling, a small group of scientists convened to consider the question of uncertainty in air quality modeling. Because the group was particularly ...

Douglas G. Fox

1984-01-01T23:59:59.000Z

194

Air cathode structure manufacture  

DOE Patents (OSTI)

An improved air cathode structure for use in primary batteries and the like. The cathode structure includes a matrix active layer, a current collector grid on one face of the matrix active layer, and a porous, nonelectrically conductive separator on the opposite face of the matrix active layer, the collector grid and separator being permanently bonded to the matrix active layer. The separator has a preselected porosity providing low IR losses and high resistance to air flow through the matrix active layer to maintain high bubble pressure during operation of the battery. In the illustrated embodiment, the separator was formed of porous polypropylene. A thin hydrophobic film is provided, in the preferred embodiment, on the current collecting metal grid.

Momyer, William R. (Palo Alto, CA); Littauer, Ernest L. (Los Altos Hills, CA)

1985-01-01T23:59:59.000Z

195

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 plant energy use. Furthermore, air compression is inefficient with up to 95% of compressor power dissipated as heat. Thus even minor improvements in system operation, control strategies, and efficiency can yield large energy savings and significant non-energy or productivity benefits from reliable compressed air. Compressed air is often called the ""fourth utility"" in industrial facilities after electricity, natural gas, and water. It provides motive power for machinery, cooling, materials handling, and hand tools. It is a safe, flexible, and powerful resource, but one that is seldom run for low operating costs or best productivity. Learning the basics of compressed air systems represents the beginning of both reducing energy costs and enjoying the productive benefits of reliable compressed air. Compressed air management systems, including a system approach to managing demand, stabilizing pressure, reducing leaks and compressor controls, can allow the industrial end user to save 20% - 50% of their air compressor electricity usage. The monitoring capabilities of compressed air management systems provide a useful tool through power, pressure and flow trending to maintain both the energy savings and increased system reliability. More efficiently managed compressed air systems are less costly to maintain and have less impact on the environment. The most important issues of industrial compressed air in relation to energy efficiency and management are: 1. Compressed air is an essential industrial utility; 2. Compressing air is a fundamentally inefficient energy transformation process; 3. Optimal operation of compressed air systems in industrial plants is seldom a priority and adequate management infonnation is rare, resulting in negative impacts on production and even less efficiency."

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

2003-05-01T23:59:59.000Z

196

Solar air conditioning  

DOE Green Energy (OSTI)

Development of a hybrid solar-assisted air conditioning system that combines a vapor compression section for sensible cooling with a desiccant section for dehumidification and that uses both solar energy and condenser waste heat to drive the dehumidifier has been under way for the last two years (1981 and 1982). The results of this research are included in this report: utilizing solar energy in an economical way has proven quite difficult.

Robison, H.

1981-01-01T23:59:59.000Z

197

Metal-air battery assessment  

DOE Green Energy (OSTI)

The objective of this report is to evaluate the present technical status of the zinc-air, aluminum/air and iron/air batteries and assess their potential for use in an electric vehicle. In addition, this report will outline proposed research and development priorities for the successful development of metal-air batteries for electric vehicle application. 39 refs., 25 figs., 11 tabs.

Sen, R.K.; Van Voorhees, S.L.; Ferrel, T.

1988-05-01T23:59:59.000Z

198

Transpired Air Collectors - Ventilation Preheating  

DOE Green Energy (OSTI)

Many commercial and industrial buildings have high ventilation rates. Although all that fresh air is great for indoor air quality, heating it can be very expensive. This short (2-page) fact sheet describes a technology available to use solar energy to preheat ventilation air and dramatically reduce utility bills.

Christensen, C.

2006-06-22T23:59:59.000Z

199

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:www.arb.ca.gov...

200

Review of air flow measurement techniques  

E-Print Network (OSTI)

rate and air leakage tests under reductive sealing for anfor subsequent sealing, the openings of air infiltrationreductive sealing between the reductions in measured air

McWilliams, Jennifer

2002-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "air density change" 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

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

202

Reduce Climate Change  

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

Reduce Climate Change Reduce Climate Change Highway vehicles release about 1.5 billion metric tons of greenhouse gases (GHGs) into the atmosphere each year-mostly in the form of carbon dioxide (CO2)-contributing to global climate change. Each gallon of gasoline you burn creates 20 pounds of CO2. That's roughly 5 to 9 tons of CO2 each year for a typical vehicle. more... How can a gallon of gasoline create 20 pounds of carbon dioxide? It seems impossible that a gallon of gasoline, which weighs about 6.3 pounds, could produce 20 pounds of carbon dioxide (CO2) when burned. However, most of the weight of the CO2 doesn't come from the gasoline itself, but the oxygen in the air. When gasoline burns, the carbon and hydrogen separate. The hydrogen combines with oxygen to form water (H2O), and carbon combines with oxygen

203

Energy Densities for LLNL EMB  

Summary of Projected Power and Energy Density Parameters for the New Generation LLNL Electromechanical Batteries R.F. Post June 24, 2013

204

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.

205

Clean Air Act Title V: Knocking on your door  

SciTech Connect

The Clean Air Act Amendments of 1990 made several significant changes in the clean air program. One of the key elements of the Amendments was the inclusion of an operating permit program in Title V. The purpose of the program is to establish a central point for tracking all applicable air quality requirements for every source required to obtain a permit. This article provides a brief description of the most significant provisions. In addition, the subject of permit modification is discussed in some detail.

Hosford, R.B. (B and V Waste Science and Technology Corp., Kansas City, MO (United States))

1993-01-15T23:59:59.000Z

206

Climate Change, the Clean Air Act, and Industrial Pollution  

E-Print Network (OSTI)

Defends Analysis Portraying Shale Gas as Worse for Climateor efficiency. See Tripp Baltz, Shale Gas Delays Markets for

Kaswan, Alice

2012-01-01T23:59:59.000Z

207

Climate Change, the Clean Air Act, and Industrial Pollution  

E-Print Network (OSTI)

Re- port.pdf. In 2009, carbon dioxide accounted for eighty-that higher local carbon dioxide concentra- tions coulddamage per ton of carbon dioxide equivalent, oil-fired power

Kaswan, Alice

2012-01-01T23:59:59.000Z

208

Climate Change, the Clean Air Act, and Industrial Pollution  

E-Print Network (OSTI)

PORTUNITIES FOR PETROLEUM REFINERIES (2005), available atsmaller impact on existing refinery emissions, ranging fromGHG regulations for oil refineries, the agency has stated

Kaswan, Alice

2012-01-01T23:59:59.000Z

209

Climate Change, the Clean Air Act, and Industrial Pollution  

E-Print Network (OSTI)

implications of biomass combustion). 122. See BAIN, supraof biomass fuel burned, the type of combustion technology,

Kaswan, Alice

2012-01-01T23:59:59.000Z

210

Climate Change, the Clean Air Act, and Industrial Pollution  

E-Print Network (OSTI)

contested subject, natural gas power plants are less carbon-emissions because natural gas power plants not only gener-mean damages from natural-gas power plants are 0.16 cents

Kaswan, Alice

2012-01-01T23:59:59.000Z

211

Climate Change, the Clean Air Act, and Industrial Pollution  

E-Print Network (OSTI)

have a greater incentive to provide power from natural gasnatural gas, 2 14 much more substantial shifts in technology use and incentivesnatural gas prices, and could also have been motivated, in part, by the incentives

Kaswan, Alice

2012-01-01T23:59:59.000Z

212

Climate Change, the Clean Air Act, and Industrial Pollution  

E-Print Network (OSTI)

that requiring a coal-fired plant to switch to natural gasand exposure, the coal-fired plants causing the greatest co-that new supercritical coal-fired power plants could achieve

Kaswan, Alice

2012-01-01T23:59:59.000Z

213

Climate Change, the Clean Air Act, and Industrial Pollution  

E-Print Network (OSTI)

fuel generation. It could then determine the emission reduction opportunities throughout the electricity-generating

Kaswan, Alice

2012-01-01T23:59:59.000Z

214

Climate Change, the Clean Air Act, and Industrial Pollution  

E-Print Network (OSTI)

emissions with natural gas power plants, which had meancontested subject, natural gas power plants are less carbon-emissions because natural gas power plants not only gener-

Kaswan, Alice

2012-01-01T23:59:59.000Z

215

Climate Change, the Clean Air Act, and Industrial Pollution  

E-Print Network (OSTI)

except to include biomass co-firing in coal-fired powermeasures and, potentially, co-firing with biomass. (It isbiopower facilities or by co- firing biomass with coal or

Kaswan, Alice

2012-01-01T23:59:59.000Z

216

Atmospheric Aerosol Chemistry, Climate Change, and Air Quality  

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

spectrometry capabilities to analyze the molecular composition of atmospheric organic aerosols, or OA, containing nitrogen- containing organic compounds (NOC) and only carbon,...

217

Regenerative air heater  

DOE Patents (OSTI)

A gas-cooled steel skirt is used to support a refractory cored brick matrix and dome structure in a high temperature regenerative air heater useful in magnetohydrodynamic power generation. The steel skirt thermally expands to accommodate the thermal expansion of the dome structure despite substantial temperature differential thereby reducing relative movement between the dome bricks. Gas cooling of the steel skirt allows the structure to operate above its normal temperature during clean-out cycles and also allows for the control of the thermal expansion of the steel skirt.

Hasselquist, Paul B. (Maple Grove, MN); Baldner, Richard (Minnetonka, MN)

1982-01-01T23:59:59.000Z

218

Regenerative air heater  

DOE Patents (OSTI)

A gas-cooled steel skirt is used to support a refractory cored brick matrix and dome structure in a high temperature regenerative air heater useful in magnetohydrodynamic power generation. The steel skirt thermally expands to accommodate the thermal expansion of the dome structure despite substantial temperature differential thereby reducing relative movement between the dome bricks. Gas cooling of the steel skirt allows the structure to operate above its normal temperature during clean-out cycles and also allows for the control of the thermal expansion of the steel skirt.

Hasselquist, P.B.; Baldner, R.

1980-11-26T23:59:59.000Z

219

Retrofit Air Preheat Economics  

E-Print Network (OSTI)

Retrofit air preheat systems are the most reliable and efficient means to effect significant energy conservation for large existing industrial furnaces. Units can be quickly installed without a lengthy shutdown, and the furnace efficiency can be increased to a range of 89% to 92%. The economic justification for the addition of this equipment is presented in new total investment curves and simple payout curves for a range of fuel cost. This will enable the owner to quickly determine the preliminary feasibility and conceptual requirements for his project before proceeding with more vigorous work.

Goolsbee, J. A.

1981-01-01T23:59:59.000Z

220

Hot air drum evaporator  

DOE Patents (OSTI)

An evaporation system for aqueous radioactive waste uses standard 30 and 55 gallon drums. Waste solutions form cascading water sprays as they pass over a number of trays arranged in a vertical stack within a drum. Hot dry air is circulated radially of the drum through the water sprays thereby removing water vapor. The system is encased in concrete to prevent exposure to radioactivity. The use of standard 30 and 55 gallon drums permits an inexpensive compact modular design that is readily disposable, thus eliminating maintenance and radiation build-up problems encountered with conventional evaporation systems.

Black, Roger L. (Idaho Falls, ID)

1981-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "air density change" 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

Reduced Water Density in a Poly(ethylene oxide) Brush  

Science Conference Proceedings (OSTI)

A model poly(ethylene oxide) (PEO) brush system, prepared by spreading a poly(ethylene oxide)-poly(n-butyl acrylate) (PEO-PnBA) amphiphilic diblock copolymer onto an air-water interface, was investigated under various grafting density conditions by using the X-ray reflectivity (XR) technique. The overall electron density profiles of the PEO-PnBA monolayer in the direction normal to the air-water interface were determined from the XR data. From this analysis, it was found that inside of the PEO brush, the water density is significantly lower than that of bulk water, in particular, in the region close to the PnBA-water interface. Separate XR measurements with a PnBA homopolymer monolayer confirm that the reduced water density within the PEO-PnBA monolayer is not due to unfavorable contacts between the PnBA surface and water. The above result, therefore, lends support to the notion that PEO chains provide a hydrophobic environment for the surrounding water molecules when they exist as polymer brush chains.

Lee, Hoyoung; Kim, Dae Hwan; Park, Hae-Woong; Mahynski, Nathan A.; Kim, Kyungil; Meron, Mati; Lin, Binhua; Won, You-Yeon (Purdue); (UC)

2012-09-05T23:59:59.000Z

222

De-icing thermostat for air conditioners  

SciTech Connect

This patent describes an electronic thermostat adapted to be connected to an air-cooling apparatus to control the operative state of the apparatus. The thermostat includes a means for generating a digital electrical signal representative of a desired temperature setpoint and means for generating a digital electrical signal representative of the ambient temperature at the thermostat. The improvement described here comprises: means for generating control signals for the aircooling apparatus in order to inhibit the accumulation of ice on the cooling element of the air-cooling apparatus when the ambient temperature is above the temperature setpoint; means, responsive to the control signals, for deenergizing the compressor in the air-cooling apparatus for a first preselected period of time whenever the compressor is determined to have run continuously for a second preselected period of time; and means for adaptively adjusting the length of at least one of the first or second preselected periods of time as a function of the change in the rate of change of the ambient temperature.

Levine, M.R.

1986-12-09T23:59:59.000Z

223

New Air Cleaning Strategies for Reduced Commercial Building Ventilation Energy  

SciTech Connect

Approximately ten percent of the energy consumed in U.S. commercial buildings is used by HVAC systems to condition outdoor ventilation air. Reducing ventilation rates would be a simple and broadly-applicable energy retrofit option, if practical counter measures were available that maintained acceptable concentrations of indoor-generated air pollutants. The two general categories of countermeasures are: 1) indoor pollutant source control, and 2) air cleaning. Although pollutant source control should be used to the degree possible, source control is complicated by the large number and changing nature of indoor pollutant sources. Particle air cleaning is already routinely applied in commercial buildings. Previous calculations indicate that particle filtration consumes only 10percent to 25percent of the energy that would otherwise be required to achieve an equivalent amount of particle removal with ventilation. If cost-effective air cleaning technologies for volatile organic compounds (VOCs) were also available, outdoor air ventilation rates could be reduced substantially and broadly in the commercial building stock to save energy. The research carried out in this project focuses on developing novel VOC air cleaning technologies needed to enable energy-saving reductions in ventilation rates. The minimum required VOC removal efficiency to counteract a 50percent reduction in ventilation rate for air cleaning systems installed in the HVAC supply airstream is modest (generally 20percent or less).

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

2010-10-27T23:59:59.000Z

224

Density-based logistic regression  

Science Conference Proceedings (OSTI)

This paper introduces a nonlinear logistic regression model for classification. The main idea is to map the data to a feature space based on kernel density estimation. A discriminative model is then learned to optimize the feature weights as well as ... Keywords: density estimation, logistic regression, medical prediction, nonlinear classification

Wenlin Chen, Yixin Chen, Yi Mao, Baolong Guo

2013-08-01T23:59:59.000Z

225

Density Log | Open Energy Information  

Open Energy Info (EERE)

Density Log Density Log Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Density Log Details Activities (6) Areas (6) Regions (0) NEPA(0) Exploration Technique Information Exploration Group: Downhole Techniques Exploration Sub Group: Well Log Techniques Parent Exploration Technique: Well Log Techniques Information Provided by Technique Lithology: provides data on the bulk density of the rock surrounding the well Stratigraphic/Structural: Stratigraphic correlation between well bores. Hydrological: Porosity of the formations loggesd can be calculated for the Density log andprovide an indication potential aquifers. Thermal: Cost Information Low-End Estimate (USD): 0.4040 centUSD 4.0e-4 kUSD 4.0e-7 MUSD 4.0e-10 TUSD / foot Median Estimate (USD): 0.6868 centUSD

226

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...

227

Abatement of Air Pollution: Hazardous Air Pollutants (Connecticut...  

Open Energy Info (EERE)

requirements. Policy Contact Contact Name Anne Gobin Department Department of Energy & Environmental Protection Division Bureau of Air Management Phone (860) 424-3026...

228

Air temperature thresholds for indoor comfort and perceived air quality  

E-Print Network (OSTI)

Moving air for comfort. ASHRAE Journal, May, Arens, E. ,17-22, Copenhagen. . ASHRAE Standard 55- 2010. ThermalSensations of Sedentary Man, ASHRAE Transactions, Vol. 80 (

Zhang, Hui; Edward, Arens; Pasut, Wilmer

2012-01-01T23:59:59.000Z

229

Forced Air Systems in High Performance Homes  

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

FORCED AIR SYSTEMS IN FORCED AIR SYSTEMS IN HIGH PERFORMANCE HOMES Iain Walker (LBNL) Building America Meeting 2013 What are the issues? 1. Sizing  When is too small too small? 2. Distribution  Can we get good mixing at low flow? 3. Performance  Humidity Control  Part load efficiency  Blowers & thermal losses Sizing  Part-load - not an issue with modern equipment  Careful about predicted loads - a small error becomes a big problem for tightly sized systems  Too Low Capacity = not robust  Extreme vs. design days  Change in occupancy  Party mode  Recovery from setback Sizing  Conventional wisdom - a good envelope = easy to predict and not sensitive to indoor conditions  But..... Heating and cooling become discretionary - large variability depending on occupants

230

Variation in Estimated Ozone-Related Health Impacts of Climate Change due to Modeling Choices and Assumptions  

SciTech Connect

Future climate change may cause air quality degradation via climate-induced changes in meteorology, atmospheric chemistry, and emissions into the air. Few studies have explicitly modeled the potential relationships between climate change, air quality, and human health, and fewer still have investigated the sensitivity of estimates to the underlying modeling choices.

Post, Ellen S.; Grambsch, A.; Weaver, C. P.; Morefield, Philip; Huang, Jin; Leung, Lai-Yung R.; Nolte, Christopher G.; Adams, P. J.; Liang, Xin-Zhong; Zhu, J.; Mahoney, Hardee

2012-11-01T23:59:59.000Z

231

Simulations of liquid ribidium expanded to the critical density  

Science Conference Proceedings (OSTI)

Quantum molecular dynamic simulations were used to examine the change in atomic and electronic structure in liquid rubidium along its liquid-vapor coexistence curve. Starting from the liquid at the triple point, with increasing expansion we observe a continuous increase in the electron localization leading to ion clustering near the metal-nonmetal transition at about twice the critical density, in agreement with electrical measurements, and to the presence of dimers near and below the critical density.

Ross, M; Yang, L H; Pilgrim, W

2006-05-16T23:59:59.000Z

232

Change Log  

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

Change Log Change Log Change Log NERSC-8 / Trinity Benchmarks Change Log 09/03/2013 Correction applied to MiniDFT web-page (to remove inconsistency with MiniDFT README). Capability Improvement measurements do not require 10,000 MPI ranks per k-point. 08/06/2013 Various pages have changed to remove "draft" status 08/02/2013 Correction added to FLOP Counts for "Small" Single-Node Miniapplication Tests page 07/12/2013 README files updated for IOR benchmark to correct an error in wording (no code changes); README file updated for osu-micro-benchmarks (OMB) changing the tests required and conditions including reinserting some tests that had been deleted earlier 07/05/2013 README updated for mpimemu benchmark; Revised version of benchmark results spreadsheet (linked on SSP web page);

233

Rock Density At Alum Area (DOE GTP) | Open Energy Information  

Open Energy Info (EERE)

Rock Density At Alum Area (DOE GTP) Rock Density At Alum Area (DOE GTP) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Rock Density At Alum Geothermal Area (DOE GTP) Exploration Activity Details Location Alum Geothermal Area Exploration Technique Rock Density Activity Date Usefulness not indicated DOE-funding Unknown References (1 January 2011) GTP ARRA Spreadsheet Retrieved from "http://en.openei.org/w/index.php?title=Rock_Density_At_Alum_Area_(DOE_GTP)&oldid=402985" Categories: Exploration Activities DOE Funded Activities ARRA Funded Activities What links here Related changes Special pages Printable version Permanent link Browse properties About us Disclaimers Energy blogs Linked Data Developer services OpenEI partners with a broad range of international organizations to grow

234

Density and pair-density scaling for deriving the Euler equation in density-functional and pair-density-functional theory  

Science Conference Proceedings (OSTI)

A link between density and pair density functional theories is presented. Density and pair density scaling are used to derive the Euler equation in both theories. Density scaling provides a constructive way of obtaining approximations for the Pauli potential. The Pauli potential (energy) of the density functional theory is expressed as the difference of the scaled and original exchange-correlation potentials (energies).

Nagy, A. [Department of Theoretical Physics, University of Debrecen, H-4010 Debrecen (Hungary)

2011-09-15T23:59:59.000Z

235

Nuclear Energy Density Functionals Constrained by Low-Energy QCD  

E-Print Network (OSTI)

A microscopic framework of nuclear energy density functionals is reviewed, which establishes a direct relation between low-energy QCD and nuclear structure, synthesizing effective field theory methods and principles of density functional theory. Guided by two closely related features of QCD in the low-energy limit: a) in-medium changes of vacuum condensates, and b) spontaneous breaking of chiral symmetry; a relativistic energy density functional is developed and applied in studies of ground-state properties of spherical and deformed nuclei.

Vretenar, Dario

2008-01-01T23:59:59.000Z

236

Nuclear Energy Density Functionals Constrained by Low-Energy QCD  

E-Print Network (OSTI)

A microscopic framework of nuclear energy density functionals is reviewed, which establishes a direct relation between low-energy QCD and nuclear structure, synthesizing effective field theory methods and principles of density functional theory. Guided by two closely related features of QCD in the low-energy limit: a) in-medium changes of vacuum condensates, and b) spontaneous breaking of chiral symmetry; a relativistic energy density functional is developed and applied in studies of ground-state properties of spherical and deformed nuclei.

Dario Vretenar

2008-02-06T23:59:59.000Z

237

Reactive Air Aluminization  

DOE Green Energy (OSTI)

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

238

Reduce Air Infiltration in Furnaces  

Science Conference Proceedings (OSTI)

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

Not Available

2006-01-01T23:59:59.000Z

239

Oklahoma Clean Air Act (Oklahoma)  

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

This legislation establishes the authority for the Oklahoma Department of Environmental Quality to administer programs to maintain and monitor air quality across Oklahoma. The Department monitors...

240

Optimization of Air Conditioning Cycling.  

E-Print Network (OSTI)

??Systems based on the vapor compression cycle are the most widely used in a variety of air conditioning applications. Despite the vast growth of modern (more)

Seshadri, Swarooph

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "air density change" 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 Conditioning | Department of Energy  

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

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...

242

Air Kerma - High Energy Xray  

Science Conference Proceedings (OSTI)

... such as high energy megavoltage x rays with peak voltages of at least 5 MV. Currently, air-kerma measurements at these high energies are not ...

2013-03-13T23:59:59.000Z

243

Reading Comprehension - Properties and Changes  

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

Properties and Changes Properties and Changes Matter can be described and identified by physical and chemical properties. Physical _________ chemicals properties substances textures have to do with appearance. You can observe many physical properties with your senses and by measuring the length, _________ width density height property , height, mass and density of a substance. _________ Chemical Matter Described Physical properties include color, shape, smell, texture, taste and size. The state of matter (whether it's a solid, _________ water molecule liquid atom , or gas) and the _________ time temperature design cylinder at which the substance boils, melts or freezes are also physical properties. Magnetic properties are physical properties as well. _________ Chemical Physical Substance Gaseous properties, on the other

244

Estimating Regional Surface Heat and Moisture Fluxes above Prairie Cropland from Surface and Upper-Air Measurements  

Science Conference Proceedings (OSTI)

Upper-air budget methods can be used to estimate the surface sensible and latent heat flux densities on a regional scale. This study assesses the application of radiosonde-based budget methods above homogeneous cropland. Serial daytime soundings ...

Alan G. Barr; G. S. Strong

1996-10-01T23:59:59.000Z

245

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 the economic attractiveness of retrofitting HVAC industrial energy recovery equipment.

Graham, E. L.

1980-01-01T23:59:59.000Z

246

Air distribution effectiveness with stratified air distribution systems  

E-Print Network (OSTI)

, Ph.D Qingyan Chen, Ph.D. Student Member ASHRAE Fellow ASHRAE ABSTRACT Stratified air distribution distribution systems has been taken into consideration by the ASHRAE standards through the air distribution effectiveness. For example, Table 6-1 of ANSI/ASHRAE Standard 62.1-2004 (ASHRAE 2004) defines the minimum

Chen, Qingyan "Yan"

247

Low density carbonized composite foams  

DOE Patents (OSTI)

A carbonized composite foam having a density less than about 50 mg/cm{sup 3} and individual cell sizes no greater than about 1 {mu}m in diameter is described, and the process of making it. 3 figs.

Kong, Fung-Ming.

1989-12-07T23:59:59.000Z

248

Quarkonium at nonzero isospin density  

E-Print Network (OSTI)

We calculate the energies of quarkonium bound states in the presence of a medium of nonzero isospin density using lattice QCD. The medium, created using a canonical (fixed isospin charge) approach, induces a reduction of ...

Detmold, William

249

What causes the density effect in young forest plantations?  

DOE Green Energy (OSTI)

In young forest plantations, trees planted at high densities frequently show more rapid height and diameter growth than those plants at lower densities. This positive growth response to density (the ''density effect'') often manifests long before seedlings are tall enough to shade one another, so it is not a simple response to shade. The mechanism(s) which trigger and sustain this growth enhancement are unknown. Our objectives were to document the temporal dynamics of positive growth response to increasing density in Douglas-fir plantations and to test two hypotheses as potential mechanisms for this response. The hypotheses are (1) a canopy boundary layer effect, and (2) alterations in the quality of light reflected from neighboring trees. The ''boundary layer'' hypotheses proposes that changes in atmospheric mixing occur in high-density plantations, promoting increased concentrations of CO{sub 2} and H{sub 2}O vapor during early morning hours, which in turn would enhance carbon assimilation. The ''light quality'' hypothesis proposes that the presence of neighbors alters the ratio of red to far red light in the canopy environment. Plant sensors detect this change in light quality, and growth and development is altered in response. We found that boundary layer conductance was higher, as we predicted, in low-density Douglas-fir stands than in high-density stands five years after planting. The changes in boundary conductance were accompanied by higher CO{sub 2} and H{sub 2}O vapor during early morning hours. However, we also found that the primary manifestation of the density effect in Douglas-fir occurs two to four years after planting, and we were not able to measure differences in boundary conductance in different densities at that time. Also, we found no difference in carbon isotope composition of wood cellulose formed in high- vs. low-density stands two to three years after planting. We conclude that although stand density may have a significant impact on boundary layer conductance in young stands, it does not account for the ''density effect''. Our tests of the light quality hypothesis were slowed due to poor plantation establishment in the early phase of this study. In a variable density experiment we detected significant changes in R:FR related to density. Also in that study we measured a significant enhancement of tree height at high density. However, after three years of growth, the study trees did not show significant differences in stem diameter related to density. Experimenters at Weyerhaeuser therefore decided not to harvest the trees at the end of the 3rd growth year, as originally planned. In a 1-year study of seedlings planted in raised beds subjected to different light quality treatments using transparent plastic film, we found that tree height but not diameter increased in response to decreased R:FR. At this point, we conclude that R:FR remains a viable hypothesis for the ''density effect'', but evidence is not conclusive. We expect that continued measurements in the variable density test plot at Weyerhaeuser will add more evidence in the future.

Barbara J. Bond; Gary A. Ritchie

2002-07-21T23:59:59.000Z

250

Effects of energy development on air quality in the Rocky Mountain West. [Environmental effects of coal and oil shale development  

SciTech Connect

Future need for fossil fuels may lead to an exploitation of Western coal and oil shale at the expense of the traditional clean air and clear skies of the West. This report evaluates the prospects for future changes in western air quality, the constraints imposed on western energy development by air quality regulations, and the impacts of that development.

Hinman, G.W.; Leonard, E.M.

1977-01-01T23:59:59.000Z

251

GUIDE TO CALCULATING TRANSPORT EFFICIENCY OF AEROSOLS IN OCCUPATIONAL AIR SAMPLING SYSTEMS  

SciTech Connect

This report will present hand calculations for transport efficiency based on aspiration efficiency and particle deposition losses. Because the hand calculations become long and tedious, especially for lognormal distributions of aerosols, an R script (R 2011) will be provided for each element examined. Calculations are provided for the most common elements in a remote air sampling system, including a thin-walled probe in ambient air, straight tubing, bends and a sample housing. One popular alternative approach would be to put such calculations in a spreadsheet, a thorough version of which is shared by Paul Baron via the Aerocalc spreadsheet (Baron 2012). To provide greater transparency and to avoid common spreadsheet vulnerabilities to errors (Burns 2012), this report uses R. The particle size is based on the concept of activity median aerodynamic diameter (AMAD). The AMAD is a particle size in an aerosol where fifty percent of the activity in the aerosol is associated with particles of aerodynamic diameter greater than the AMAD. This concept allows for the simplification of transport efficiency calculations where all particles are treated as spheres with the density of water (1 g?cm-3). In reality, particle densities depend on the actual material involved. Particle geometries can be very complicated. Dynamic shape factors are provided by Hinds (Hinds 1999). Some example factors are: 1.00 for a sphere, 1.08 for a cube, 1.68 for a long cylinder (10 times as long as it is wide), 1.05 to 1.11 for bituminous coal, 1.57 for sand and 1.88 for talc. Revision 1 is made to correct an error in the original version of this report. The particle distributions are based on activity weighting of particles rather than based on the number of particles of each size. Therefore, the mass correction made in the original version is removed from the text and the calculations. Results affected by the change are updated.

Hogue, M.; Hadlock, D.; Thompson, M.; Farfan, E.

2013-11-12T23:59:59.000Z

252

Apparatus for controlling the air-fuel ratio in an internal combustion engine  

Science Conference Proceedings (OSTI)

Apparatus for controlling the air-fuel ratio in an internal combustion engine to substantially maintain the ratio at a predetermined value while the engine is operating under various load conditions. The engine has a carburetor with an air passageway through which air is drawn into the engine. Fuel is supplied to the carburetor through a fuel system and mixed with air passing through the carburetor. The presence of oxygen in the combustion products, which is a function of the air-fuel ratio of the mixture, is sensed and a first electrical signal representative of the oxygen content is supplied. The first electrical signal is compared with a predetermined reference level which is a function of the predetermined value to produce a second electrical signal having first and second signal elements, a first signal element being produced when the air-fuel ratio of the mixture is greater than the predetermined level and a second signal element being produced when the ratio is less than the level. A control responsive to the second electrical signal supplies to an air metering unit a control signal by which the quantity of air introduced into the fuel system is controlled. A change in the control signal is produced whenever the second electrical signal has a transition from one signal element to the other thereby for the air metering unit to change the quantity of air introduced into the fuel system conduit by an amount necessary to substantially maintain the air-fuel ratio at the predetermined value.

Gantzert, T.R.; Hicks, D.L.; Lindberg, A.W.

1981-07-21T23:59:59.000Z

253

Air conditioning: Impact on the built environment  

Science Conference Proceedings (OSTI)

The topics discussed in this book are: Introduction. 1. Air Conditioning - An Ever Expanding Market. 2. Building Envelope Design and Air Contitioning. 3. Air Conditioning and Energy - The CIBSE Building Energy Code. 4. Thermal Storage in Air Conditioning Systems. 5. Good Practice in the Design and Construction of Air Conditioning Systems. 6. Software for Air Conditioning Load Analysis and Design. 7. Lloyd's of London - The Architecture of Air Conditioning - Prediction of the Environment.

Sherratt, A.F.C.

1987-01-01T23:59:59.000Z

254

Effects of Nonaqueous Electrolytes on Primary Li-Air Batteries  

SciTech Connect

The effects of nonaqueous electrolytes on the performance of primary Li-air batteries operated in dry air environment have been investigated. Organic solvents with low volatility and low moisture absorption are necessary to minimize the change of electrolyte compositions and the reaction between Li anode and water during the discharge process. The polarity of aprotic solvents outweighs the viscosity, ion conductivity and oxygen solubility on the performance of Li-air batteries once these latter properties attain certain reasonable level, because the solvent polarity significantly affects the number of tri-phase regions formed by oxygen, electrolyte, and active carbons (with catalyst) in the air electrode. The most feasible electrolyte formulation is the system of LiTFSI in PC/EC mixtures, whose performance is relatively insensitive to PC/EC ratio and salt concentration. The quantity of such electrolyte added to a Li-air cell has notably effects on the discharge performance of the Li-air battery as well, and a maximum in capacity is observed as a function of electrolyte amount. The coordination effect from the additives or co-solvents [tris(pentafluorophenyl)borane and crown ethers in this study] also greatly affects the discharge performance of a Li-air battery.

Xu, Wu; Xiao, Jie; Wang, Deyu; Zhang, Jian; Zhang, Jiguang

2010-06-14T23:59:59.000Z

255

Continuous air monitor filter changeout apparatus  

DOE Patents (OSTI)

An apparatus and corresponding method for automatically changing out a filter cartridge in a continuous air monitor. The apparatus includes: a first container sized to hold filter cartridge replacements; a second container sized to hold used filter cartridges; a transport insert connectively attached to the first and second containers; a shuttle block, sized to hold the filter cartridges that is located within the transport insert; a transport driver mechanism means used to supply a motive force to move the shuttle block within the transport insert; and, a control means for operating the transport driver mechanism.

Rodgers, John C. (Santa Fe, NM)

2008-07-15T23:59:59.000Z

256

VSD/VFD Screw air compressor, Kunshan CompAirs Machinery Plant ...  

U.S. Energy Information Administration (EIA)

VSD/VFD Screw air compressor,Kunshan CompAirs Machinery Plant Co.,Ltd is the leading air compressor manufacturer and exporter in china, Professional ...

257

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

258

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

259

The Clean Air Mercury Rule  

SciTech Connect

Coming into force on July 15, 2005, the US Clean Air Mercury Rule will use a market-based cap-and-trade approach under Section 111 of the Clean Air Act to reduce mercury emissions from the electric power sector. This article provides a comprehensive summary of the new rule. 14 refs., 2 tabs.

Michael Rossler [Edison Electric Institute, Washington, DC (US)

2005-07-01T23:59:59.000Z

260

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

Note: This page contains sample records for the topic "air density change" 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

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

262

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.

263

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

264

Powdered coal air dispersion nozzle  

SciTech Connect

An improved coal/air dispersion nozzle introduces fuel into the combustion chamber of a gas turbine engine as a finely atomized, dispersed spray for a uniform combustion. The nozzle has an inlet that receives finely powdered coal from a coal transport or coal/air fluidizer system and a scroll swirl generator is included within the nozzle to swirl a fluidized coal/air mixture supplied to the inlet of the nozzle. The scroll is in the form of a thin, flat metal sheet insert, twisted along its length, and configured to prevent build-up of coal particles within the nozzle prior to ejection from its outlet. Airblast air jets are included along the length of the nozzle body to assist in the discharge of the fluidized coal from the nozzle outlet and an angular pintle tip overlies the outlet to redirect coal/air mixture through a desired fluidized coal spray angle.

Kosek, T.P.; Steinhilper, E.A.

1981-10-27T23:59:59.000Z

265

Extended Air Showers and Muon Interactions  

E-Print Network (OSTI)

The objective of this work is to report on the influence of muon interactions on the development of air showers initiated by astroparticles. We make a comparative study of the different theoretical approaches to muon bremsstrahlung and muonic pair production interactions. A detailed algorithm that includes all the relevant characteristics of such processes has been implemented in the AIRES air shower simulation system. We have simulated ultra high energy showers in different conditions in order to measure the influence of these muonic electromagnetic interactions. We have found that during the late stages of the shower development (well beyond the shower maximum) many global observables are significantly modified in relative terms when the mentioned interactions are taken into account. This is most evident in the case of the electromagnetic component of very inclined showers. On the other hand, our simulations indicate that the studied processes do not induce significant changes either in the position of the shower maximum or the structure of the shower front surface.

A. N. Cillis; S. J. Sciutto

2000-10-24T23:59:59.000Z

266

Zinc air battery development for electric vehicles  

DOE Green Energy (OSTI)

This report summarizes the results of research conducted during the sixteen month continuation of a program to develop rechargeable zinc-air batteries for electric vehicles. The zinc-air technology under development incorporates a metal foam substrate for the zinc electrode, with flow of electrolyte through the foam during battery operation. In this soluble'' zinc electrode the zincate discharge product dissolves completely in the electrolyte stream. Cycle testing at Lawrence Berkeley Laboratory, where the electrode was invented, and at MATSI showed that this approach avoids the zinc electrode shape change phenomenon. Further, electrolyte flow has been shown to be necessary to achieve significant cycle life (> 25 cycles) in this open system. Without it, water loss through the oxygen electrode results in high-resistance failure of the cell. The Phase I program, which focused entirely on the zinc electrode, elucidated the conditions necessary to increase electrode capacity from 75 to as much as 300 mAh/cm{sup 2}. By the end of the Phase I program over 500 cycles had accrued on one of the zinc-zinc half cells undergoing continuous cycle testing. The Phase II program continued the half cell cycle testing and separator development, further refined the foam preplate process, and launched into performance and cycle life testing of zinc-air cells.

Putt, R.A.; Merry, G.W. (MATSI, Inc., Atlanta, GA (United States))

1991-07-01T23:59:59.000Z

267

Effect of Ambient Design Temperature on Air-Cooled Binary Plant Output  

Science Conference Proceedings (OSTI)

Air-cooled binary plants are designed to provide a specified level of power production at a particular air temperature. Nominally this air temperature is the annual mean or average air temperature for the plant location. This study investigates the effect that changing the design air temperature has on power generation for an air-cooled binary plant producing power from a resource with a declining production fluid temperature and fluctuating ambient temperatures. This analysis was performed for plants operating both with and without a geothermal fluid outlet temperature limit. Aspen Plus process simulation software was used to develop optimal air-cooled binary plant designs for specific ambient temperatures as well as to rate the performance of the plant designs at off-design operating conditions. Results include calculation of annual and plant lifetime power generation as well as evaluation of plant operating characteristics, such as improved power generation capabilities during summer months when electric power prices are at peak levels.

Dan Wendt; Greg Mines

2011-10-01T23:59:59.000Z

268

NETL: Water-Energy Interface - Improvement to Air2Air Technology...  

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

cooling tower with relatively drier and cooler ambient air. This is done in an air-to-air heat exchanger made up of plastic sheets with two discreet air pathways. As the warm,...

269

Lei Chang  

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

Ph.D. in Theoretical Physics, Peking University, Beijing, China. Selected Recent Articles Phase diagram and critical endpoint for strongly-interacting quarks Si-xue Qin, Lei Chang,...

270

2013Chang  

Science Conference Proceedings (OSTI)

FOR IMMEDIATE RELEASE March 12, 2013 AOCS Announces 2013 Stephen S. Change Award Recipient AOCS is proud to announce that Alejandro G. Marangoni, Professor and Tier I Canada Research Chair Food, Health and Agin

271

Investigating mid-air pointing interaction for projector phones  

Science Conference Proceedings (OSTI)

Projector phones, mobile phones with built-in projectors, might significantly change the way we are going to use and interact with mobile phones. The potential of combining the mobile and the projected display and further the potential of the mid-air ... Keywords: gesture, pointing, projector phone, selection, target

Christian Winkler; Ken Pfeuffer; Enrico Rukzio

2012-11-01T23:59:59.000Z

272

Indoor air radon  

SciTech Connect

This review concerns primarily the health effects that result from indoor air exposure to radon gas and its progeny. Radon enters homes mainly from the soil through cracks in the foundation and other holes to the geologic deposits beneath these structures. Once inside the home the gas decays (half-life 3.8 d) and the ionized atoms adsorb to dust particles and are inhaled. These particles lodge in the lung and can cause lung cancer. The introduction to this review gives some background properties of radon and its progeny that are important to understanding this public health problem as well as a discussion of the units used to describe its concentrations. The data describing the health effects of inhaled radon and its progeny come both from epidemiological and animal studies. The estimates of risk from these two data bases are consistent within a factor of two. The epidemiological studies are primarily for hard rock miners, although some data exist for environmental exposures. The most complete studies are those of the US, Canadian, and Czechoslovakian uranium miners. Although all studies have some deficiencies, those of major importance include uranium miners in Saskatchewan, Canada, Swedish iron miners, and Newfoundland fluorspar miners. These six studies provide varying degrees of detail in the form of dose-response curves. Other epidemiological studies that do not provide quantitative dose-response information, but are useful in describing the health effects, include coal, iron ore and tin miners in the UK, iron ore miners in the Grangesburg and Kiruna, Sweden, metal miners in the US, Navajo uranium miners in the US, Norwegian niobian and magnitite miners, South African gold and uranium miners, French uranium miners, zinc-lead miners in Sweden and a variety of small studies of environmental exposure. An analysis of the epidemiological studies reveals a variety of interpretation problem areas.172 references.

Cothern, C.R.

1990-01-01T23:59:59.000Z

273

Analysis of Efficiency Standards for Air Conditioners, Air ...  

U.S. Energy Information Administration (EIA)

Federal agencies to select ENERGY STAR and ... analyze the proposed air conditioner and heat pump standards, a new baseline ... square foot office building 0.4 to 0.8 ...

274

Hierarchically Porous Graphene as a Lithium-Air Battery Electrode  

Science Conference Proceedings (OSTI)

Functionalized graphene sheets (FGS) are successfully utilized as a novel air electrode for Li-O2 batteries. An extremely high capacity of 15,000 mAh/g was achieved by using the as-prepared graphene air electrode at a current density of 0.1 mA/cm2 in the pure oxygen environment. Although there is no pore in the two-dimensional FGS the as-prepared graphene air electrode consists of randomly arranged graphene nano-sheets which automatically form tunnels with different sizes. The large tunnels work as highways for the oxygen to quickly flow into the air electrode while the small pore-like tunnels can be considered as the numerous exits where the discharge products are accumulated. Combined with an appropriate electrolyte, the ideal discharge product Li2O2 is obtained without any carbonates byproducts in this system. Even when operated in ambient environment with a relative humidity of ~20% the specific capacity delivered from the pouch type cell achieves more than 5000 mAh/g making the graphene-based air electrode extremely attractive in the energy storage applications.

Xiao, Jie; Mei, Donghai; Li, Xiaolin; Xu, Wu; Wang, Deyu; Graff, Gordon L.; Bennett, Wendy D.; Nie, Zimin; Saraf, Laxmikant V.; Aksay, Ilhan A.; Liu, Jun; Zhang, Jiguang

2011-11-09T23:59:59.000Z

275

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,

276

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

277

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

278

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

279

SolarAire LLC | Open Energy Information  

Open Energy Info (EERE)

SolarAire LLC Place Folsom, California Sector Solar Product Developing a solar thermal air conditioning unit. References SolarAire LLC1 LinkedIn Connections CrunchBase Profile...

280

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 LinkedIn...

Note: This page contains sample records for the topic "air density change" 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

Magnetic Method to Characterize the Current Densities in Breaker Arc  

Science Conference Proceedings (OSTI)

The purpose of this research was to use magnetic induction measurements from a low voltage breaker arc, to reconstruct the arc's current density. The measurements were made using Hall effect sensors, which were placed close to, but outside the breaking device. The arc was modelled as a rectangular current sheet, composed of a mix of threadlike current segments and with a current density varying across the propagation direction. We found the magnetic induction of the arc is a convolution product of the current density, and a function depending on the breaker geometry and arc model. Using deconvolution methods, the current density in the electric arc was determined.The method is used to study the arc behavior into the breaker device. Notably, position, arc size, and electric conductivity could all be determined, and then used to characterize the arc mode, diffuse or concentrated, and study the condition of its mode changing.

Machkour, Nadia [National Institute of Standards and Technology (United States)

2005-04-15T23:59:59.000Z

282

Rooftop Unitary Air Conditioner with Integral Dedicated Outdoor Air System  

SciTech Connect

Energy use of rooftop and other unitary air-conditioners in commercial applications accounts for about 1 quad (10{sup 15} Btu) of primary energy use annually in the U.S. [Reference 7]. The realization that this cooling equipment accounts for the majority of commercial building cooled floorspace and the majority also of commercial building energy use has spurred development of improved-efficiency equipment as well as development of stricter standards addressing efficiency levels. Another key market driver affecting design of rooftop air-conditioning equipment has been concern regarding comfort and the control of humidity. Trends for increases in outdoor air ventilation rates in certain applications, and the increasing concern about indoor air quality problems associated with humidity levels and moisture in buildings points to a need for improved dehumidification capability in air-conditioning equipment of all types. In many cases addressing this issue exacerbates energy efficiency, and vice versa. The integrated dedicated outdoor air system configuration developed in this project addresses both energy and comfort/humidity issues.

Tiax Llc

2006-02-28T23:59:59.000Z

283

Extending the Sensitivity of Air Cerenkov Telescopes  

E-Print Network (OSTI)

Over the last decade, the Imaging Air Cerenkov technique has proven itself to be an extremely powerful means to study very energetic gamma-radiation from a number of astrophysical sources in a regime which is not practically accessible to satellite-based instruments. The further development of this approach in recent years has generally concentrated on increasing the density of camera pixels, increasing the mirror area and using multiple telescopes. Here we present a practical method to substantially improve the sensitivity of Atmospheric Cerenkov Telescopes using wide-field cameras with a relatively course density of photomultiplier tubes. The 2-telescope design considered here is predicted to be more than ~3 times more sensitive than existing/planned arrays in the regime above 300 GeV for continuously emitting sources; up to ~10 times more sensitive for hour-scale emission (relevant for episodic sources, such as AGN); significantly more sensitive in the regime above 10 TeV; and possessing a sky coverage which is roughly an order of magnitude larger than existing instruments. It should be possible to extend this approach for even further improvement in sensitivity and sky coverage.

I. de la Calle Perez; S. D. Biller

2006-02-13T23:59:59.000Z

284

Determination of the transient electron temperature in a femtosecond-laser-induced air plasma filament  

Science Conference Proceedings (OSTI)

The transient electron temperature in a weakly ionized femtosecond-laser-produced air plasma filament was determined from optical absorption and diffraction experiments. The electron temperature and plasma density decay on similar time scales of a few hundred picoseconds. Comparison with plasma theory reveals the importance of inelastic collisions that lead to energy transfer to vibrational degrees of freedom of air molecules during the plasma cooling.

Sun Zhanliang; Chen Jinhai; Rudolph, Wolfgang [University of New Mexico, Department of Physics and Astronomy, Albuquerque, New Mexico 87131 (United States)

2011-04-15T23:59:59.000Z

285

Terrace housing : providing quality in higher-density housing  

E-Print Network (OSTI)

The higher demand of higher-density housing in Bangkok due to the rapid growth of the economy and the use of high-performance materials and modern construction methods has changed the forms of housing from low-rise buildings ...

Atthakor, Songpol

1992-01-01T23:59:59.000Z

286

Plasma digital density determining device  

DOE Patents (OSTI)

The density of a decaying plasma in an electrically conducting enclosure is determined by applying an excitation to the cavity formed by the enclosure and counting digitally the number of resonant frequencies traversed by the combination of the cavity and the decaying plasma.

Sprott, Julien C. (Madison, WI); Lovell, Thomas W. (Madison, WI); Holly, Donald J. (Madison, WI)

1976-01-01T23:59:59.000Z

287

Collector efficiency of the double-pass solar air collectors with fins  

Science Conference Proceedings (OSTI)

The experimental study on a forced-convective double-pass solar air collector with fins in the second channel has been conducted. The experiments were conducted by changing the parameters that influence the thermal efficiency of the collector. The efficiency ... Keywords: collector efficiency, double-pass solar air collector, fins absorbers

A. Fudholi; M. H. Ruslan; M. Y. Othman; M. Yahya; Supranto Supranto; A. Zaharim; K. Sopian

2010-10-01T23:59:59.000Z

288

Building a Universal Nuclear Energy Density Functional  

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

Building a Universal Nuclear Energy Density Functional Building a Universal Nuclear Energy Density Functional VaryMatrix.png Collaboration with mathematicians and computational...

289

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":""}]}

290

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...

291

Manual on indoor air quality  

Science Conference Proceedings (OSTI)

This reference manual was prepared to assist electric utilities in helping homeowners, builders, and new home buyers to understand a broad range of issues related to indoor air quality. The manual is directed to technically knowledgeable persons employed by utility companies - the customer service or marketing representative, applications engineer, or technician - who may not have specific expertise in indoor air quality issues. In addition to providing monitoring and control techniques, the manual summarizes the link between pollutant concentrations, air exchange, and energy conservation and describes the characteristics and health effects of selected pollutants. Where technical information is too lengthy or complex for inclusion in this volume, reference sources are given. Information for this manual was gathered from technical studies, manufacturers' information, and other materials from professional societies, institutes, and associations. The aim has been to provide objective technical and descriptive information that can be used by utility personnel to make informed decisions about indoor air quality issues.

Diamond, R.C.; Grimsrud, D.T.

1983-12-01T23:59:59.000Z

292

Kansas Air Quality Act (Kansas)  

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

No person shall construct, own, operate, install, alter or use any air contaminant emission stationary source which, in accordance with rules and regulations, the secretary finds may cause or...

293

Nadir Correction of AIRS Radiances  

Science Conference Proceedings (OSTI)

A statistical method to correct for the limb effect in off-nadir Atmospheric Infrared Sounder (AIRS) channel radiances is described, using the channel radiance itself and principal components (PCs) of the other channel radiances to account for ...

Chee-Kiat Teo; Tieh-Yong Koh

2010-03-01T23:59:59.000Z

294

buy vsd air compressor - high quality Manufacturers,Suppliers ...  

U.S. Energy Information Administration (EIA)

vsd air compressor trade offers directory and vsd air compressor business offers list. Trade leads from vsd air compressor Suppliers and vsd air ...

295

AIR QUALITY IMPACTS OF LIQUEFIED NATURAL GAS IN THE SOUTH COAST AIR BASIN OF CALIFORNIA  

SciTech Connect

The effects of liquefied natural gas (LNG) on pollutant emission inventories and air quality in the South Coast Air Basin of California were evaluated using recent LNG emission measurements by Lawrence Berkeley National Laboratory and the Southern California Gas Company (SoCalGas), and with a state-of-the-art air quality model. Pollutant emissions can be affected by LNG owing to differences in composition and physical properties, including the Wobbe index, a measure of energy delivery rate. This analysis uses LNG distribution scenarios developed by modeling Southern California gas flows, including supplies from the LNG receiving terminal in Baja California, Mexico. Based on these scenarios, the projected penetratino of LNG in the South Coast Air Basin is expected to be limited. In addition, the increased Wobbe index of delivered gas (resulting from mixtures of LNG and conventional gas supplies) is expected to cause increases smaller than 0.05 percent in overall (area-wide) emissions of nitrogen oxides (NOx). BAsed on the photochemical state of the South Coast Air Basin, any increase in NOx is expected to cause an increase in the highest local ozone concentrations, and this is reflected in model results. However, the magnitude of the increase is well below the generally accepted accuracy of the model and would not be discernible with the existing monitoring network. Modeling of hypothetical scenarios indicates that discernible changes to ambient ozone and particulate matter concentrations would occur only at LNG distribution rates that are not achievable with current or planned infrastructure and with Wobbe index vlaues that exceed current gas quality tariffs. Results of these hypothetical scenarios are presented for consideration of any proposed substantial expansion of LNG supply infrastructure in Southern California.

Carerras-Sospedra, Marc; Brouwer, Jack; Dabdub, Donald; Lunden, Melissa; Singer, Brett

2011-07-01T23:59:59.000Z

296

Indoor Air Quality and Volatile Organic Compounds  

Science Conference Proceedings (OSTI)

... The unit was sized to comply with the outdoor air requirements in ASHRAE Standard 62.2 Ventilation and Acceptable Indoor Air Quality in Low ...

2013-03-12T23:59:59.000Z

297

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 LinkedIn...

298

Radionuclide Air Emission Report for 2011  

E-Print Network (OSTI)

LBNL-470E-201 Radionuclide Air Emission Report for Preparedfor Emissions of Radionuclides Other Than Radon FromFugitive Air Emissions of Radionuclides from Diffuse Sources

Wahl, Linnea

2012-01-01T23:59:59.000Z

299

Radionuclide Air Emission Report for 2008  

E-Print Network (OSTI)

Fugitive Air Emissions of Radionuclides from Diffuse SourcesHazardous Air Pollutants (Radionuclides), Availability ofLBNL to Revise Its Radionuclide NESHAP Monitoring Approach,

Wahl, Linnea

2009-01-01T23:59:59.000Z

300

Central Air conditioners | Open Energy Information  

Open Energy Info (EERE)

Page Edit History Facebook icon Twitter icon Central Air conditioners Jump to: navigation, search TODO: Add description List of Central Air conditioners Incentives Retrieved...

Note: This page contains sample records for the topic "air density change" 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

Review of air flow measurement techniques  

E-Print Network (OSTI)

chamber, passive sampling, passive solar house, measurementhouse, we planed the distribution of fresh air, passivepassive perfluorocarbon tracer technique for determining air infiltration rates into houses

McWilliams, Jennifer

2002-01-01T23:59:59.000Z

302

Air permitting of IGCC plants  

SciTech Connect

The IGCC process is, currently, the preferred choice over conventional thermal power production in regard to cleanup of fuel and significantly reduced contaminant emissions. The air permitting requirements include the review of: feed preparation and PM emissions; feed gasification and contaminant emissions; elemental sulfur recovery and SO{sub 2} emissions; options for carbon-dioxide recovery; syngas characteristics for combustion; CT design and combustion mechanisms; air contaminant emissions of CT; controlled CT emissions of nitrogen-oxides and carbon-monoxide gases using the SCR and oxidation catalysts, respectively; and, emission of volatile organic compounds (VOCs), and hazardous air pollutants (HAPs). However, the IGCC processes are being rigorously reviewed for the system integration and reliability, and significant reduction of air contaminant emissions (including the greenhouse gases). This paper included a review of IGCC air contaminant emission rates, and various applicable regulatory requirements, such as NSR (New Source Review), NSPS (New Source Performance Standards), and MACT (Maximum Achievable Control Technology). The IGCC facility's NOX, CO, SO{sub 2}, PM, VOCs, and HAPs emission rates would be significantly low. Thus, effective, construction and installation, and operation air permits would be necessary for IGCC facilities.

Chitikela, S.R.

2007-07-01T23:59:59.000Z

303

Definition: Density Log | Open Energy Information  

Open Energy Info (EERE)

Density Log Density Log Jump to: navigation, search Dictionary.png Density Log Density logging is a well logging tool that can provide a continuous record of a formation's bulk density along the length of a borehole. In geology, bulk density is a function of the density of the minerals forming a rock (i.e. matrix) and the fluid enclosed in the pore spaces.[1] View on Wikipedia Wikipedia Definition Density logging is a well logging tool that can provide a continuous record of a formation's bulk density along the length of a borehole. In geology, bulk density is a function of the density of the minerals forming a rock and the fluid enclosed in the pore spaces. This is one of three well logging tools that are commonly used to calculate porosity, the other two being sonic logging and neutron porosity logging

304

Variations in Surface Air Temperatures: Part 2. Arctic Regions, 18811980  

Science Conference Proceedings (OSTI)

We describe annual and seasonal changes in air temperatures over high latitudes of the Northern Hemisphere during the period 18811980. Trends (that is, fluctuations on time scales greater than 20 years) in the average temperature of the Arctic ...

P. M. Kelly; P. D. Jones; C. B. Sear; B. S. G. Cherry; R. K. Tavakol

1982-02-01T23:59:59.000Z

305

Roll and Cell Convection in Wintertime Arctic Cold-Air Outbreaks  

Science Conference Proceedings (OSTI)

Cold-air outbreaks from the polar ice caps or winterly continents over the open ocean lead to organized convection that typically starts as longitudinal roll patterns and changes to cellular patterns in downstream direction. During the field ...

Burghard Brmmer

1999-08-01T23:59:59.000Z

306

Solar and Thermal Radiation Errors on Upper-Air Radiosonde Temperature Measurements  

Science Conference Proceedings (OSTI)

Atmospheric temperature and humidity profiles are important for weather prediction, but climate change has increased the interest in upper-air observations asking for very high quality reference measurements. Here we show an experimental approach ...

R. Philipona; A. Kruchi; G. Romanens; G. Levrat; P. Ruppert; E. Brocard; P. Jeannet; D. Ruffieux; B. Calpini

307

Reference Upper-Air Observations for Climate: Rationale, Progress, and Plans  

Science Conference Proceedings (OSTI)

While the global upper-air observing network has provided useful observations for operational weather forecasting for decades, its measurements lack the accuracy and long-term continuity needed for understanding climate change. Consequently, the ...

Dian J. Seidel; Franz H. Berger; Franz Immler; Michael Sommer; Holger Vmel; Howard J. Diamond; John Dykema; David Goodrich; William Murray; Thomas Peterson; Douglas Sisterson; Peter Thorne; Junhong Wang

2009-03-01T23:59:59.000Z

308

Solar and Thermal Radiation Errors on Upper-Air Radiosonde Temperature Measurements  

Science Conference Proceedings (OSTI)

Atmospheric temperature and humidity profiles are important for weather prediction, but climate change has increased the interest in upper-air observations asking for very high-quality reference measurements. This paper discusses an experimental ...

R. Philipona; A. Kruchi; G. Romanens; G. Levrat; P. Ruppert; E. Brocard; P. Jeannet; D. Ruffieux; B. Calpini

2013-10-01T23:59:59.000Z

309

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.

310

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.

311

Physical Impacts of Climate Change on the Western US Electricity System: A Scoping Study  

E-Print Network (OSTI)

air conditioning Space-conditioning load shapes may change (consumption for space conditioning [35, 41, 43] and peaklocal temperature [11, 26]. Space-conditioning energy use is

Coughlin, Katie

2008-01-01T23:59:59.000Z

312

Form PI-1 General Application for Air Preconstruction Permit | Open Energy  

Open Energy Info (EERE)

General Application for Air Preconstruction Permit General Application for Air Preconstruction Permit Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Reference Material: Form PI-1 Air Preconstruction Permit Details Activities (0) Areas (0) Regions (0) Abstract: Unavailable Author(s): Unknown Published: Texas Commission on Environmental Quality, Date Unknown Document Number: Unavailable DOI: Unavailable Source: View Original Document Retrieved from "http://en.openei.org/w/index.php?title=Form_PI-1_General_Application_for_Air_Preconstruction_Permit&oldid=631449" Category: Reference Materials What links here Related changes Special pages Printable version Permanent link Browse properties 429 Throttled (bot load) Error 429 Throttled (bot load) Throttled (bot load) Guru Meditation: XID: 1863640201

313

Analysis of Energy Saving in a Clean Room Air-conditioning System  

E-Print Network (OSTI)

To address the issue of the substantial energy cost and operating cost of an all-return air system for a clean room, we changed the former system to a 2nd return air system. With the newest building energy simulation program, Energy Plus, we simulated and compared the summer energy consuming conditions of the two systems. Results prove the superiority of the 2nd return air system, and the validity of the simulation. Also, the air system energy performance in summer was illustrated with typical meteorological hour-to-hour data.

Liu, S.; Liu, J.; Pei, J.; Wang, M.

2006-01-01T23:59:59.000Z

314

Renewable Energy and the Clean Air Interstate Rule  

Wind Powering America (EERE)

Joe Bryson Joe Bryson US Environmental Protection Agency Climate Protection Partnerships Division January 12, 2006 bryson.joe@epa.gov (202) 343-9631 Renewable Energy and the Clean Air Interstate Rule My Perspective Where I Sit: Climate Change Protection Division * Energy STAR products, buildings, and homes * Green Power Partnership * CHP Partnership * Climate Leaders * EPA-State Partnerships on Clean Energy and Utility Regulation Who I Coordinate with: Clean Air Markets Division * Responsible for the design, analysis, and implementation of EPA's cap and trade programs for SO2, NOx, and Hg Information from Two Views Environmental Regulatory Perspective Renewable Energy Perspective Environmental Regulatory Perspective States have full authority and flexibility to allocate NOx

315

Residential Humidity Control: Exciting New Opportunities with Air Flow Modulation  

E-Print Network (OSTI)

This paper reviews psychrometric principles and shows how to formulate a psychrometric chart from a single equation. The chart is used to demonstrate the manner in which a conventional single-speed air conditioner adjusts its operating point in an attempt to control humidity over a range of conditions. The system performance with an electronically commutated motor (ECM) driving the blower is then presented. With ECM blower speed control, it is possible to raise the sensible capacity, reduce the sensible capacity, and boost the efficiency of an otherwise conventional air conditioner. This makes such systems ideal to respond to the changing loads in a hot and humid climate.

Crawford, J. G.

1987-01-01T23:59:59.000Z

316

Probability Densities in Strong Turbulence  

E-Print Network (OSTI)

According to modern developments in turbulence theory, the "dissipation" scales (u.v. cut-offs) $\\eta$ form a random field related to velocity increments $\\delta_{\\eta}u$. In this work we, using Mellin's transform combined with the Gaussain large -scale boundary condition, calculate probability densities (PDFs) of velocity increments $P(\\delta_{r}u,r)$ and the PDF of the dissipation scales $Q(\\eta, Re)$, where $Re$ is the large-scale Reynolds number. The resulting expressions strongly deviate from the Log-normal PDF $P_{L}(\\delta_{r}u,r)$ often quoted in the literature. It is shown that the probability density of the small-scale velocity fluctuations includes information about the large (integral) scale dynamics which is responsible for deviation of $P(\\delta_{r}u,r)$ from $P_{L}(\\delta_{r}u,r)$. A framework for evaluation of the PDFs of various turbulence characteristics involving spatial derivatives is developed. The exact relation, free of spurious Logarithms recently discussed in Frisch et al (J. Fluid Mech. {\\bf 542}, 97 (2005)), for the multifractal probability density of velocity increments, not based on the steepest descent evaluation of the integrals is obtained and the calculated function $D(h)$ is close to experimental data. A novel derivation (Polyakov, 2005), of a well-known result of the multi-fractal theory [Frisch, "Turbulence. {\\it Legacy of A.N.Kolmogorov}", Cambridge University Press, 1995)), based on the concepts described in this paper, is also presented.

Victor Yakhot

2005-12-12T23:59:59.000Z

317

Density estimation for data with rounding errors  

Science Conference Proceedings (OSTI)

Rounding of data is common in practice. The problem of estimating the underlying density function based on data with rounding errors is addressed. A parametric maximum likelihood estimator and a nonparametric bootstrap kernel density estimator are proposed. ... Keywords: Bootstrapping, Deconvolution density estimation, Fast Fourier transformation, Kernel density estimation, Measurement error

B. Wang, W. Wertelecki

2013-09-01T23:59:59.000Z

318

Effect of Observational Sampling Error on the Detection of Anthropogenic Climate Change  

Science Conference Proceedings (OSTI)

The effect of sampling error in surface air temperature observations is assessed for detection and attribution of an anthropogenic signal. This error arises because grid-box values are based on varying densities of station and marine data. An ...

Gabriele C. Hegerl; Philip D. Jones; Tim P. Barnett

2001-01-01T23:59:59.000Z

319

Effect of Dissolved Air on the Density and Refractive Index of Water  

Science Conference Proceedings (OSTI)

based on their statements about reproducibility and uncertainty. Given the scatter shown in Fig. ...... Partial financial sup- port for this work was provided by...

320

Inferring the Pattern of the Oceanic Meridional Transport from the AirSea Density Flux  

Science Conference Proceedings (OSTI)

An extension of Walins water mass transformation analysis is proposed that would make it possible to assess the strength of the adiabatic along-isopycnal component of the meridional overturning circulation (MOC). It is hypothesized that the ...

Timour Radko; Igor Kamenkovich; Pierre-Yves Dare

2008-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "air density change" 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

Tracking Progress in Reducing Mercury Air Emissions Compiled by the Northeast States for Coordinated Air Use Management (NESCAUM)  

E-Print Network (OSTI)

The Northeast states have taken steps since at least the 1990s to reduce and eliminate mercury emitted to the air from local sources. These steps occurred despite objections often raised against them asserting that they would be ineffective. The objections typically invoke the existence of a global pool of mercury created by mercury emissions from around the world that dominates local and regional mercury deposition. According to this argument, local and regional mercury emission reductions should have negligible benefits for the local and regional environment because the reductions will be overwhelmed by mercury deposition from the global mercury pool. While a global mercury pool does exist, a wealth of real world observations shows that changes in local and regional mercury air emissions are in fact readily seen within fairly short time periods in the local and regional environment. This is indeed borne out by the results seen in the Northeast and elsewhere in the United States. The following sections present the results of scientific studies showing local and regional connections between changes in mercury air emissions and changes in mercury appearing in the environment. These are grouped according to the type of mercury emission source: 1) mercury from coal combustion, 2) mercury from waste incineration, and 3) mercury from smelters. While the main focus is on the Northeast, we include studies from outside the region to further illustrate the connections between changes in local and regional mercury emissions and changes in mercury found in the environment.

unknown authors

2007-01-01T23:59:59.000Z

322

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 causes a significant amount of reheat and constant fan power under partial load conditions. Variable Frequency Drives (VFDs) can be installed on these constant air volume systems. The fan speed can be modulated based on the maximum zone load. This paper present the procedure to control the supply fan speed and analyzes the thermal performance and major fan energy and thermal energy savings without expensive VAV retrofit through the actual system operation.

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

2007-01-01T23:59:59.000Z

323

Improved intake air filtration systems  

SciTech Connect

This report comprises the results of a project sponsored by the Pipeline Research Committee of the American Gas Association (Improved Intake Air Filtration Systems). The quality of the inlet air consumed by pipeline gas turbines plays a significant role in the performance, maintenance, and economy of turbine operations. The airborne contaminants may cause degradation of compressor blades and hot gas path components, primarily by erosion, corrosion, and fouling. Machines in the pipeline fleet have a typical average loss of 3.5% in output, chiefly caused by fouling of the gas turbine compressor. It also showed that: Air contamination could be significantly reduced by the use of more efficient air filtration systems, especially through the reduction of the quantity of smaller particles ingested.'' Filters which incorporated electrostatically charged fibers (achieved through the use of triboelectric [TE] effects) offered the most promising means for developing an improvement over paper media. The purpose of this program was to validate the use of new technology for self-cleaning air inlet filtration on gas turbine pumping applications. An approach utilizing triboelectrification of fabric filters was examined by testing to determine the penetration (efficiency), cleanability, pressure drop vs flow, and dust-holding capacity of seven pairs of filter cartridges: six fabric and one paper.

Lawson, C.C. (Lawson (Calvin C.), North Wildwood, NJ (United States))

1991-09-01T23:59:59.000Z

324

Air-breathing fuel cell stacks for portable power applications  

DOE Green Energy (OSTI)

Increasing attention is being directed towards polymer electrolyte fuel cells as battery replacements because of their potentially superior energy densities and the possibility of `mechanical` refueling. On the low end of the power requirement scale (ca. 10 W), fuel cells can compete with primary and secondary batteries only if the fuel cell systems are simple, inexpensive, and reliable. Considerations of cost and simplicity (and minimal parasitic power) discourage the use of conventional performance enhancing subsystems (e.g., humidification, cooling, or forced-reactant flow). We are developing a stack design that is inherently self-regulating to allow effective operation without the benefit of such auxiliary components. The air cathode does not use forced flow to replenish the depleted oxygen. Instead, the oxygen in the air must diffuse into the stack from the periphery of the unit cells. For this reason the stack is described as `air-breathing.` This configuration limits the ability of water to escape which prevents the polymer electrolyte membranes from drying out, even at relatively high continuous operation temperatures (+60 degrees C). This results in stacks with reliable and stable performance. This air-breathing configuration assumes a unique stack geometry that utilizes circular flow-field plates with an annular hydrogen feed manifold and the single tie-bolt extending up through the central axis of the stack. With this geometry, the hydrogen supply to the unit cells is radially outward, and the air supply is from the periphery inward. This configuration has several advantages. The entire periphery is free to air access and allows greater heat conduction to enhance cooling. Furthermore, all of the components in the stack (e.g., the flow-fields, seals and membrane/electrode assemblies), are radially symmetrical, so part fabrication is simple and the entire system is potentially low-cost. Lastly, this configuration is compact and lightweight.

Wilson, M.S.; DeCaro, D.; Neutzler, J.K.; Zawodzinski, C.; Gottesfeld, S.

1996-10-01T23:59:59.000Z

325

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

326

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.

327

Quick-change filter cartridge  

DOE Patents (OSTI)

A quick-change filter cartridge. In sampling systems for measurement of airborne materials, a filter element is introduced into the sampled airstream such that the aerosol constituents are removed and deposited on the filter. Fragile sampling media often require support in order to prevent rupture during sampling, and careful mounting and sealing to prevent misalignment, tearing, or creasing which would allow the sampled air to bypass the filter. Additionally, handling of filter elements may introduce cross-contamination or exposure of operators to toxic materials. Moreover, it is desirable to enable the preloading of filter media into quick-change cartridges in clean laboratory environments, thereby simplifying and expediting the filter-changing process in the field. The quick-change filter cartridge of the present invention permits the application of a variety of filter media in many types of instruments and may also be used in automated systems. The cartridge includes a base through which a vacuum can be applied to draw air through the filter medium which is located on a porous filter support and held there by means of a cap which forms an airtight seal with the base. The base is also adapted for receiving absorbing media so that both particulates and gas-phase samples may be trapped for investigation, the latter downstream of the aerosol filter.

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

1995-01-01T23:59:59.000Z

328

Impact of CIR Storms on Thermosphere Density Variability during the Solar Minimum of 2008  

E-Print Network (OSTI)

The solar minimum of 2008 was exceptionally quiet, with sunspot numbers at their lowest in 75 years. During this unique solar minimum epoch, however, solar wind high - speed streams emanating from near-equatorial coronal holes occurred frequently and were the primary contributor to the recurrent geomagnetic activity at Earth. These conditions enabled the isolation of forcing by geomagnetic activity on the preconditioned solar minimum state of the upper atmosphere caused by Corotating Interaction Regions (CIRs). Thermosphere density observations around 400 km from the CHAMP satellite are used to study the thermosphere density response to solar wind high - speed streams/CIRs. Superposed epoch results show that thermosphere density responds to high - speed streams globally, and the density at 400 km changes by 75% on average. The relative changes of neutral density are comparable at different latitudes, although its variability is largest at high latitudes. In addition, the response of thermosphere density to hi...

Lei, Jiuhou; Wang, Wenbin; McPherron, Robert L

2010-01-01T23:59:59.000Z

329

Air Showers and Geomagnetic Field  

E-Print Network (OSTI)

The influence of the geomagnetic field on the development of air showers is studied. The well known International Geomagnetic Reference Field was included in the AIRES air shower simulation program as an auxiliary tool to allow calculating very accurate estimations of the geomagnetic field given the geographic coordinates, altitude above sea level and date of a given event. Our simulations indicate that the geomagnetic deflections alter significantly some shower observables like, for example, the lateral distribution of muons in the case of events with large zenith angles (larger than 75 degrees). On the other hand, such alterations seem not to be important for smaller zenith angles. Global observables like total numbers of particles or longitudinal development parameters do not present appreciable dependences on the geomagnetic deflections for all the cases that were studied.

A. Cillis; S. J. Sciutto

1999-07-31T23:59:59.000Z

330

Building Air Quality & Ventilation Models: Review - Evaluation - Proposals  

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

Building Air Quality & Ventilation Models: Review - Evaluation - Proposals Building Air Quality & Ventilation Models: Review - Evaluation - Proposals Speaker(s): James Axley Date: March 12, 1999 - 12:00pm Location: Bldg. 90 Seminar Host/Point of Contact: Richard Sextro Developments in mathematical models for building air quality and ventilation analysis have changed the way we idealize buildings for purposes of analysis, the way we form system equations to effect the analysis, and the way we solve these equations to realize the analysis. While much has been achieved more is possible. This presentation will review the current state of the art - the building idealizations used, the system equations formed, and the solution methods applied - critically evaluate the completeness, complexity and utility of the most advanced models, and present proposals for future development

331

DENSITY CONTROL IN A REACTOR  

DOE Patents (OSTI)

A reactor is described in which natural-uranium bodies are located in parallel channels which extend through the graphite mass in a regular lattice. The graphite mass has additional channels that are out of the lattice and contain no uranium. These additional channels decrease in number per unit volume of graphite from the center of the reactor to the exterior and have the effect of reducing the density of the graphite more at the center than at the exterior, thereby spreading neutron activity throughout the reactor. (AEC)

Marshall, J. Jr.

1961-10-24T23:59:59.000Z

332

Experimentally Measured Interfacial Area during Gas Injection into Saturated Porous Media: An Air Sparging Analogy  

Science Conference Proceedings (OSTI)

The amount of interfacial area (awn) between air and subsurface liquids during air-sparging can limit the rate of site remediation. Lateral movement within porous media could be encountered during air-sparging operations when air moves along the bottom of a low-permeability lens. This study was conducted to directly measure the amount of awn between air and water flowing within a bench-scale porous flow cell during the lateral movement of air along the upper edge of the cell during air injections into an initially water-saturated flow cell. Four different cell orientations were used to evaluate the effect of air injection rates and porous media geometries on the amount of awn between fluids. Air was injected at flow rates that varied by three orders of magnitude, and for each flow cellover this range of injection rates little change in awn was noted. A wider variation in awn was observed when air moved through different regions for the different flow cell orientations. These results are in good agreement with the experimental findings of Waduge et al. (2007), who performed experiments in a larger sand-pack flow cell, and determined that air-sparging efficiency is nearly independent of flow rate but highly dependent on the porous structure. By directly measuring the awn, and showing that awn does not vary greatly with changes in injection rate, we show that the lack of improvement to remediation rates is because there is a weak dependence of the awn on the air injection rate.

Crandall, Dustin; Ahmadi, Goodarz; Smith, Duane H., Bromhal, Grant

2010-01-01T23:59:59.000Z

333

Investigation of Feasibility of All-Fresh Air Supply in an All-Air System  

E-Print Network (OSTI)

The feasibility of an all-fresh air supply in an all-air system is investigated in theory, and the problem of AHU-handling air in low efficiency in summer and winter conditions is analyzed. The air supply temperature is almost up to standards when a heat recovery unit is fixed in the air conditioning system.

Wang, J.; Yan, Z.

2006-01-01T23:59:59.000Z

334

inAir: Measuring and Visualizing Indoor Air Quality Sunyoung Kim & Eric Paulos  

E-Print Network (OSTI)

, air quality, domestic computing, health ACM Classification Keywords H.m. Information interfacesinAir: Measuring and Visualizing Indoor Air Quality Sunyoung Kim & Eric Paulos Human}@cs.cmu.edu ABSTRACT Good indoor air quality is a vital part of human health. Poor indoor air quality can contribute

Paulos, Eric

335

Changes in fluctuation waves in coherent airflow structures with input perturbation  

Science Conference Proceedings (OSTI)

We predict the development and propagation of the fluctuations in a perturbed ideally-expanded air jet. A non-propagating harmonic perturbation in the density, axial velocity, and pressure is introduced at the inflow with different frequencies to produce ... Keywords: acoustic, air, coherent, fluctuation, jet, perturbation, synchronized, waves

Osama A. Marzouk

2008-10-01T23:59:59.000Z

336

Definition: Power density | Open Energy Information  

Open Energy Info (EERE)

density density Jump to: navigation, search Dictionary.png Power density The rate of energy flow (power) per unit volume, area or mass. Common metrics include: horsepower per cubic inch, watts per square meter and watts per kilogram.[1][2] View on Wikipedia Wikipedia Definition Power density (or volume power density or volume specific power) is the amount of power (time rate of energy transfer) per unit volume. In energy transformers like batteries, fuel cells, motors, etc. but also power supply units or similar, power density refers to a volume. It is then also called volume power density which is expressed as W/m. Volume power density is sometimes an important consideration where space is constrained. In reciprocated internal combustion engines, power density- power per swept

337

Laser breakdown in air at ultrahigh laser pulse repetition rates  

SciTech Connect

Some specific features of interaction of intense femtosecond laser pulses with air at ultrahigh pulse repetition rates have been experimentally studied. Data on the dynamics of plasma cloud expansion and the plasma electron density on time intervals no longer than 10 ns are obtained by femtosecond interferometry. These data are interpreted in terms of the most likely mechanisms of ionised gas recombination. The effect of ultrahigh-frequency laser radiation on a medium was modelled by double-pulse irradiation with a short delay {Delta}t between the pulses: from 1 ps to 11 ns. A nonmonotonic dependence of the degree of air ionisation by the second pulse on the delay time {Delta}t is found; possible mechanisms of these dependences are discussed in terms of the processes of femtosecond radiation absorption in the residual plasma. (extreme light fields and their applications)

Kononenko, Vitalii V; Kononenko, Taras V; Pashinin, V P; Gololobov, V M; Konov, Vitalii I [A M Prokhorov General Physics Institute, Russian Academy of Sciences, Moscow (Russian Federation)

2013-04-30T23:59:59.000Z

338

Ambient Air Sampling During Quantum-dot Spray Deposition  

Science Conference Proceedings (OSTI)

Ambient air sampling for nano-size particle emissions was performed during spot spray coating operations with a Sono-Tek Exactacoat Benchtop system (ECB). The ECB consisted of the application equipment contained within an exhaust enclosure. The enclosure contained numerous small access openings, including an exhaust hook-up. Door access comprised most of the width and height of the front. The door itself was of the swing-out type. Two types of nanomaterials, Cadmium selenide (Cd-Se) quantum-dots (QDs) and Gold (Au) QDs, nominally 3.3 and 5 nm in diameter respectively, were applied during the evaluation. Median spray drop size was in the 20 to 60 micrometer size range.1 Surface coating tests were of short duration, on the order of one-half second per spray and ten spray applications between door openings. The enclosure was ventilated by connection to a high efficiency particulate aerosol (HEPA) filtered house exhaust system. The exhaust rate was nominally 80 ft3 per minute producing about 5 air changes per minute. Real time air monitoring with a scanning mobility particle size analyzer (SMPS ) with a size detection limit of 7 nm indicated a significant increase in the ambient air concentration upon early door opening. A handheld condensation particle counter (CPC) with a lower size limit of 10 nm did not record changes in the ambient background. This increase in the ambient was not observed when door opening was delayed for 2 minutes (~10 air changes). The ventilated enclosure controlled emissions except for cases of rapid door opening before the overspray could be removed by the exhaust. A time delay sufficient to provide 10 enclosure air changes (a concentration reduction of more than 99.99 %) before door opening prevented the release of aerosol particles in any size.2 Scanning-transmission electron microscopy (STEM) and atomic force microscopy (AFM) demonstrated the presence of agglomerates in the surfaces of the spray applied deposition. A filtered air sample of the enclosure overspray examined by AFM also demonstrated the presence of agglomerates for the Au QDs. The AFM system was not able to resolve individual QDs as was the STEM. Chemical fingerprinting of the QDs with STEM/EDS (energy dispersive spectroscopy) was performed for the Cd-Se surface deposition, but not the aerosol. Both STEM and AFM background characterization by morphology and chemical fingerprinting were performed throughout the laboratory for a period of about one year. Outdoor sources were primarily biological, combustion fume, salt and other crustal particles. Indoor sources were primarily paper/clothing fibers, spray-on insulation fragments, fiber glass, and human skin cells.

Jankovic, John Timothy [ORNL; Hollenbeck, Scott M [ORNL

2010-01-01T23:59:59.000Z

339

Climatic Change  

E-Print Network (OSTI)

Carbon dioxide (CO2) sequestration has been proposed as a key component in technological portfolios for managing anthropogenic climate change, since it may provide a faster and cheaper route to significant reductions in atmospheric CO2 concentrations than abating CO2 production. However, CO2 sequestration is not a perfect substitute for CO2 abatement because CO2 may leak back into the atmosphere (thus imposing future climate change impacts) and because CO2 sequestration requires energy (thus producing more CO2 and depleting fossil fuel resources earlier). Here we use analytical and numerical models to assess the economic efficiency of CO2 sequestration and analyze the optimal timing and extent of CO2 sequestration. The economic efficiency factor of CO2 sequestration can be expressed as the ratio of the marginal net benefits of sequestering CO2 and avoiding CO2 emissions. We derive an analytical solution for this efficiency factor for a simplified case in which we account for CO2 leakage, discounting, the additional fossil fuel requirement of CO2 sequestration, and the growth rate of carbon taxes. In this analytical model, the economic efficiency of CO2 sequestration decreases as the CO2 tax growth rate, leakage rates and energy requirements for CO2 sequestration increase.

Klaus Keller; David Mcinerney; David F. Bradford

2007-01-01T23:59:59.000Z

340

Polyaniline modified graphene and carbon nanotube composite electrode for asymmetric supercapacitors of high energy density  

E-Print Network (OSTI)

supercapacitors of high energy density Qian Cheng a,b , Jie Tang a,b,**, Norio Shinya b , Lu-Chang Qin c as supercapacitor electrodes. Energy density of 188 Wh kg?1 has been obtained. Graphene composite with carbon April 2013 Keywords: Supercapacitor Graphene Carbon nanotube PANI a b s t r a c t Graphene and single

Qin, Lu-Chang

Note: This page contains sample records for the topic "air density change" 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

4D-HD for high energy density plasmas: shedding light into rapidly...  

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

D-HD for high energy density plasmas: shedding light into rapidly changing, opaque plasmas Wednesday, July 24, 2013 - 3:00pm SLAC, Redtail Hawk Conference Room 108A Marta Fajardo,...

342

Improved Battery Pack Thermal Management to Reduce Cost and Increase Energy Density: Cooperative Research and Development Final Report, CRADA Number CRD-12-499  

SciTech Connect

Under this CRADA NREL will support Creare's project for the Department of Energy entitled 'Improved Battery Pack Thermal Management to Reduce Cost and Increase Energy Density' which involves the development of an air-flow based cooling product that increases energy density, safety, and reliability of hybrid electric vehicle battery packs.

Smith, K.

2013-10-01T23:59:59.000Z

343

The Path Density of Interhemispheric Surface-to-Surface Transport. Part I: Development of the Diagnostic and Illustration with an Analytic Model  

Science Conference Proceedings (OSTI)

A new path-density diagnostic for atmospheric surface-to-surface transport is formulated. The path density ? gives the joint probability that air whose last surface contact occurred on patch ?i at time ti will make its next surface contact with ...

Mark Holzer

2009-08-01T23:59:59.000Z

344

I) EXAS AIR CONTROL BLAR  

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

I) EXAS AIR CONTROL BLAR 6330 HWY. 290 EAST, AUSTIN, TEXAS 78723, 512451-5711 DICK WHmINGTON, P.E. JOHN L. BLAIR CHAIRMAN MARCUS M. KEY, M.D. CALVIN 8. PARNELL, JR., Ph.D., P.E....

345

Air-leakage control manual  

Science Conference Proceedings (OSTI)

This manual is for builders and designers who are interested in building energy-efficient homes. The purpose of the manual is to provide the ``how and why`` of controlling air leakage by means of a system called the ``Simple Caulk and Seal`` (SIMPLE{center_dot}CS) system. This manual provides an overview of the purpose and contents of the manual; It discusses the forces that affect air leakage in homes and the benefits of controlling air leakage. Also discussed are two earlier approaches for controlling air leakage and the problems with these approaches. It describes the SIMPLE-{center_dot}CS system. It outlines the standard components of the building envelope that require sealing and provides guidelines for sealing them. It outlines a step-by-step procedure for analyzing and planning the sealing effort. The procedure includes (1) identifying areas to be sealed, (2) determining the most effective and convenient stage of construction in which to do the sealing, and (3) designating the appropriate crew member or trade to be responsible for the sealing.

Maloney, J. [Washington State Energy Office, Olympia, WA (United States)

1991-05-01T23:59:59.000Z

346

Air-Leakage Control Manual.  

Science Conference Proceedings (OSTI)

This manual is for builders and designers who are interested in building energy-efficient homes. The purpose of the manual is to provide the how and why'' of controlling air leakage by means of a system called the Simple Caulk and Seal'' (SIMPLE{center dot}CS) system. This manual provides an overview of the purpose and contents of the manual; It discusses the forces that affect air leakage in homes and the benefits of controlling air leakage. Also discussed are two earlier approaches for controlling air leakage and the problems with these approaches. It describes the SIMPLE-{center dot}CS system. It outlines the standard components of the building envelope that require sealing and provides guidelines for sealing them. It outlines a step-by-step procedure for analyzing and planning the sealing effort. The procedure includes (1) identifying areas to be sealed, (2) determining the most effective and convenient stage of construction in which to do the sealing, and (3) designating the appropriate crew member or trade to be responsible for the sealing.

Maloney, Jim; Washington State Energy Office; United States. Bonneville Power Administration.

1991-05-01T23:59:59.000Z

347

220-MW compressed air storage  

Science Conference Proceedings (OSTI)

SOYLAND Power Cooperative, Inc., a Decatur, Illinois based co-op, could get reasonably priced baseload power from neighboring utilities, had a plant of its own planned for the near future as well as a share in another, but peaking power, generated by oil and gas, to meet surges in demand, was very costly. The co-op's solution, first in the U.S., is a 220-megawatt compressed air energy storage system (CAES), which the electric utility industry is watching with great interest. CAES splits the two basic stages of a conventional gas turbine, making the most of baseload power while using the least peaking or intermediate fuel. During off-peak periods, inexpensive baseload electricity from coal or nuclear power plants runs a combination motor-generator in motor mode which, in turn, operates a compressor. The compressed air is cooled and pumped into an underground storage reservoir hundreds of thousands of cubic yards in volume and about two thousand feet (about 610 m) below the surface. There the air remains, at pressures up to about 60 atm (6.1 MPa), until peaking or intermediate power is required. Then, the air is released into a combustor at a controlled rate, heated by oil or gas, and expanded through a turbine. The turbine drives the motor-generator in a generator mode, thereby supplying peaking or intermediate power to the grid.

Lihach, N.

1983-01-01T23:59:59.000Z

348

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

349

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.

350

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.

351

Low-temperature sintering and phase changes in chromite interconnect materials  

DOE Green Energy (OSTI)

Sintering shrinkage curves and phase changes were compared for calcium-substituted lanthanum chromates with either slight Asite enrichment or depletion. Of the former type, La[sub 0.7]Ca[sub 0.31],CrO[sub 3] that was synthesized by the glycine-nitrate method sintered to high density in air at 1250C, exhibiting two rapid-shrinkage events. Weight loss measurements corroborated XRD data showing that, prior to densiflcation, over half the Ca resided in non-perovskite phases, including CaCrO[sub 4]. In the La[sub 0.7]Ca[sub 0.31]CrO[sub 3], densification was closely associated with re-dissolution of the Ca into the perovskite.

Chick, L.A.; Armstrong, T.R.; McCready, D.E.; Coffey, G.W.; Maupin, G.D.; Bates, J.L.

1993-05-01T23:59:59.000Z

352

Low-temperature sintering and phase changes in chromite interconnect materials  

DOE Green Energy (OSTI)

Sintering shrinkage curves and phase changes were compared for calcium-substituted lanthanum chromates with either slight Asite enrichment or depletion. Of the former type, La{sub 0.7}Ca{sub 0.31},CrO{sub 3} that was synthesized by the glycine-nitrate method sintered to high density in air at 1250C, exhibiting two rapid-shrinkage events. Weight loss measurements corroborated XRD data showing that, prior to densiflcation, over half the Ca resided in non-perovskite phases, including CaCrO{sub 4}. In the La{sub 0.7}Ca{sub 0.31}CrO{sub 3}, densification was closely associated with re-dissolution of the Ca into the perovskite.

Chick, L.A.; Armstrong, T.R.; McCready, D.E.; Coffey, G.W.; Maupin, G.D.; Bates, J.L.

1993-05-01T23:59:59.000Z

353

Phase diagram of amorphous solid water: Low-density, high-density, and very-high-density amorphous ices  

E-Print Network (OSTI)

for the understanding of the transformation between the different amorphous ices and the two hypothesized phasesPhase diagram of amorphous solid water: Low-density, high-density, and very-high-density amorphous ices Nicolas Giovambattista,1,2 H. Eugene Stanley,2 and Francesco Sciortino3 1 Department of Chemical

Sciortino, Francesco

354

Optimal Outside Air Control for Air Handling Units with Humidity Control  

E-Print Network (OSTI)

Most air handling units (AHUs) in commercial buildings have the (air) economizer cycle to use outside air for free cooling under certain outside air conditions. Ideally the economizer cycle is enabled if outside air enthalpy is less than return air enthalpy. During the economizer cycle, outside air flow is modulated to seek mixed air temperature at a supply air temperature set point. Since the outside air may be dry during the economizer cycle, humidification is required for AHUs with humidity control. As a result, the economizer cycle saves cooling energy but requires excessive steam for humidification. Therefore the economizer cycle may not be economical. An optimal outside air control method is developed to minimize the total cost of mechanical cooling and steam humidification. The impacts of chilled water price, steam price, and space minimum humidity set point are analyzed. Finally the optimal outside air control zones are presented on a psychrometric chart under differential energy price ratios and minimum indoor humidity set points.

Wang, G.; Liu, M.

2006-01-01T23:59:59.000Z

355

Changing climate  

SciTech Connect

This article reviews a book written by a committee of the National Research Council. The book discussed the Greenhouse Effect which is a warming of the earth's atmosphere caused by the doubling of the atmospheric carbon dioxide concentration. The excess carbon dioxide is pollution derived from the burning of fossil fuels. The report suggested that the warming of the atmosphere would cause thawing of the polar regions which in turn would cause a rise in sea levels and flooding of the coastal lowlands. In addition to the flooding, the report predicted climate changes that would effect the productivity of croplands in the west. The authors of the report stressed that there was no way to avoid this warming of the earth. They suggested that people should start preparing for the inevitable.

1983-01-01T23:59:59.000Z

356

SOFC chromite sintering and electrolyte/air-electrode interface reactions  

DOE Green Energy (OSTI)

Air sintering of chromites was investigated in La(Sr)CrO{sub 3}, La(Ca)CrO{sub 3}, and Y(Ca)CrO{sub 3}. Effects of alkaline earth dopant level and chromium enrichment/depletion on chromite sintered densities and microstructures are discussed. Ac impedance spectroscopy and dc polarization coupled with an unbonded interface cell were used to examine SOFC (solid oxide fuel cells) electrochemical reactions at solid-solid-gas interfaces, particularly for La{sub 1-x}Sr{sub x}MnO{sub 3}. 5 refs.

Bates, J.L.; Chick, L.A.; Youngblood, G.E.

1992-04-01T23:59:59.000Z

357

SOFC chromite sintering and electrolyte/air-electrode interface reactions  

DOE Green Energy (OSTI)

Air sintering of chromites was investigated in La(Sr)CrO[sub 3], La(Ca)CrO[sub 3], and Y(Ca)CrO[sub 3]. Effects of alkaline earth dopant level and chromium enrichment/depletion on chromite sintered densities and microstructures are discussed. Ac impedance spectroscopy and dc polarization coupled with an unbonded interface cell were used to examine SOFC (solid oxide fuel cells) electrochemical reactions at solid-solid-gas interfaces, particularly for La[sub 1-x]Sr[sub x]MnO[sub 3]. 5 refs.

Bates, J.L.; Chick, L.A.; Youngblood, G.E.

1992-04-01T23:59:59.000Z

358

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

359

Effects of Soil Moisture on the Responses of Soil Temperatures to Climate Change in Cold Regions  

Science Conference Proceedings (OSTI)

At high latitudes, changes in soil moisture could alter soil temperatures independently of air temperature changes by interacting with the snow thermal rectifier. The authors investigated this mechanism with model experiments in the Community Land ...

Zachary M. Subin; Charles D. Koven; William J. Riley; Margaret S. Torn; David M. Lawrence; Sean C. Swenson

2013-05-01T23:59:59.000Z

360

A Bayesian Assessment of Climate Change Using Multimodel Ensembles. Part I: Global Mean Surface Temperature  

Science Conference Proceedings (OSTI)

A Bayesian approach is applied to the observed global surface air temperature (SAT) changes using multimodel ensembles (MMEs) of the Intergovernmental Panel on Climate Change (IPCC) Fourth Assessment Report (AR4) simulations and single-model ...

Seung-Ki Min; Andreas Hense

2006-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "air density change" 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

Improved association in a classical density functional theory for water  

E-Print Network (OSTI)

We present a modification to our recently published SAFT-based classical density functional theory for water. We have recently developed and tested a functional for the averaged radial distribution function at contact of the hard-sphere fluid that is dramatically more accurate at interfaces than earlier approximations. We now incorporate this improved functional into the association term of our free energy functional for water, improving its description of hydrogen bonding. We examine the effect of this improvement by studying two hard solutes: a hard hydrophobic rod and a hard sphere. The improved functional leads to a moderate change in the density profile and a large decrease in the number of hydrogen bonds broken in the vicinity of the solutes.We present a modification to our recently published SAFT-based classical density functional theory for water. We have recently developed and tested a functional for the averaged radial distribution function at contact of the hard-sphere fluid that is dramatically more accurate at interfaces than earlier approximations. We now incorporate this improved functional into the association term of our free energy functional for water, improving its description of hydrogen bonding. We examine the effect of this improvement by studying two hard solutes: a hard hydrophobic rod and a hard sphere. The improved functional leads to a moderate change in the density profile and a large decrease in the number of hydrogen bonds broken in the vicinity of the solutes.

Eric J. Krebs; Jeff B. Schulte; David Roundy

2013-09-07T23:59:59.000Z

362

Interferometric measurements of plasma density in high-. beta. plasmas  

SciTech Connect

The coupled-cavity laser interferometer technique is particularly applicable to the measurement of pulsed plasma densities. This technique is based on the fact that if a small fraction of a gas laser's output radiation is reflected into the laser with an external mirror, the intensity of the laser output is modulated. These amplitude or intensity modulations are produced by changes in the laser gain. A rotating corner mirror or an oscillating mirror can be used to produce a continuous feedback modulation of the interferometer which produces a continuous background fringe pattern. The presence of plasma in the outer cavity causes an additional change which results in a phase shift of the regular period of the background fringe pattern. The integral of the plasma density along the line of sight can be evaluated by comparison of the time history of the fringes obtained with and without plasma.

Quinn, W.E.

1977-01-01T23:59:59.000Z

363

Oxides having high energy densities  

DOE Patents (OSTI)

Certain disclosed embodiments generally relate to oxide materials having relatively high energy and/or power densities. Various aspects of the embodiments are directed to oxide materials having a structure B.sub.i(M.sub.jY.sub.k)O.sub.2, for example, a structure Li.sub.j(Ni.sub.jY.sub.k)O.sub.2 such as Li(Ni.sub.0.5Mn.sub.0.5)O.sub.2. In this structure, Y represents one or more atoms, each independently selected from the group consisting of alkaline earth metals, transition metals, Group 14 elements, Group 15, or Group 16 elements. In some embodiments, such an oxide material may have an O3 crystal structure, and/or a layered structure such that the oxide comprises a plurality of first, repeating atomic planes comprising Li, and a plurality of second, repeating atomic planes comprising Ni and/or Y.

Ceder, Gerbrand; Kang, Kisuk

2013-09-10T23:59:59.000Z

364

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

365

Risk Bounds for Mixture Density Estimation  

E-Print Network (OSTI)

In this paper we focus on the problem of estimating a bounded density using a finite combination of densities from a given class. We consider the Maximum Likelihood Procedure (MLE) and the greedy procedure described by ...

Rakhlin, Alexander

2004-01-27T23:59:59.000Z

366

Fuel Cell Systems Sensors Air Management Benchmarking Modeling  

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

Systems Systems F u e l P r o c e s s o r Sensors Air Management Benchmarking Modeling Patrick Davis Patrick Davis Targets and Status 50 kWe (net) Integrated Fuel Cell Power System 5000 2000 1000 Hours Durability 45 125 275 $/kW Cost (including H2 storage) 650 500 400 W/L Power density (w/o H2 stor) Operating on direct hydrogen 5000 2000 1000 Hours Durability 45 125 325 $/kW Cost 325 250 140 W/L Power density Operating on Tier 2 gasoline containing 30 ppm sulfur, average 2010 2005 2003 status Units Characteristics Projects Fuel Cell Power Systems Analysis ANL NREL TIAX Directed Technologies, Inc. TIAX TIAX * Fuel Cell Systems Analysis * Fuel Cell Vehicle Systems Analysis * Cost Analyses of Fuel Cell Stacks/ Systems * DFMA Cost Estimates of Fuel Cell/ Reformer Systems at Low, Medium, & High Production Rates * Assessment of Fuel Cell Auxiliary

367

TANGO ARRAY An Air Shower Experiment in Buenos Aires  

E-Print Network (OSTI)

A new Air Shower Observatory has been constructed in Buenos Aires during 1999, and commissioned and set in operation in 2000. The observatory consists of an array of four water \\v{C}erenkov detectors, enclosing a geometrical area of $\\sim$ 30.000 m$^{2}$, and is optimized for the observation of cosmic rays in the ``knee'' energy region. The array detects $\\sim$ 250 to $\\sim$ 1500 showers/day, depending on the selected triggering condition. In this paper, the design and construction of the array, and the automatic system for data adquisition, daily calibration, and monitoring, are described. Also, the Monte Carlo simulations performed to develop a shower database, as well as the studies performed using the database to estimate the response and the angular and energy resolutions of the array, are presented in detail.

P. Bauleo; C. Bonifazi; A. Filevich; A. Reguera

2001-04-20T23:59:59.000Z

368

Screw Air Compressor 220v, Screw Air Compressor 220v Suppliers ...  

U.S. Energy Information Administration (EIA)

Source Top Quality Screw Air Compressor 220v Suppliers, screw mini air compressor 220v Companies, atlas copco screw compressor Manufacturers. Welcome. ...

369

Room Temperature Control During Season Switchover with Single Duct Variable Air Volume System Without Reheat  

E-Print Network (OSTI)

The Langford A building houses the College of Architecture on TAMU campus. There are ten singleduct variable air volume (VAV) air-handling units (AHUs) without reheat serving the building. The local pneumatic thermostats modulate the dampers of VAV boxes to maintain room temperature at their setpoints. The thermostat action is switched from direct acting (DA) to reverse acting (RA) when the season changes from fall to winter and vice versa from winter to spring, based on the out side air temperature, when season changes. This results in various parts of the building ether too cold or too hot during the season change. This paper presents that the thermostat action will be switched according to cooling loads or discharge air temperature, instead of outside air temperature. For the interior zone, thermostat action does not need to be switched at all. The comfort is improved and savings is achieved by the new control scheme. Because some air-handling units (AHUs) serve both interior and exterior zones, this system never worked as intended. The system must be modified to have zone reheat and the AHUs discharge air temperature is set below dew point for humidity control.

Liu, C.; Deng, S.; Claridge, D. E.; Turner, W. D.; Bruner, H.

2003-01-01T23:59:59.000Z

370

Promoting Geothermal Energy: Air Emissions Comparison and Externality Analysis  

Science Conference Proceedings (OSTI)

When compared to fossil fuel energy sources such as coal and natural gas, geothermal emerges as one of the least polluting forms of energy, producing virtually zero air emissions. Geothermal offers a baseload source of reliable power that compares favorably with fossil fuel power sources. But unless legislative changes are enacted, geothermal energy will continue to be produced at only a fraction of its potential.

Kagel, Alyssa; Gawell, Karl

2005-09-01T23:59:59.000Z

371

Bivariate density estimation using BV regularisation  

Science Conference Proceedings (OSTI)

The problem of bivariate density estimation is studied with the aim of finding the density function with the smallest number of local extreme values which is adequate with the given data. Adequacy is defined via Kuiper metrics. The concept of the taut-string ... Keywords: Density estimation, Modality, Regularisation

Andreas Obereder; Otmar Scherzer; Arne Kovac

2007-08-01T23:59:59.000Z

372

Air sampling in the workplace. Final report  

Science Conference Proceedings (OSTI)

This report provides technical information on air sampling that will be useful for facilities following the recommendations in the NRC`s Regulatory Guide 8.25, Revision 1, ``Air sampling in the Workplace.`` That guide addresses air sampling to meet the requirements in NRC`s regulations on radiation protection, 10 CFR Part 20. This report describes how to determine the need for air sampling based on the amount of material in process modified by the type of material, release potential, and confinement of the material. The purposes of air sampling and how the purposes affect the types of air sampling provided are discussed. The report discusses how to locate air samplers to accurately determine the concentrations of airborne radioactive materials that workers will be exposed to. The need for and the methods of performing airflow pattern studies to improve the accuracy of air sampling results are included. The report presents and gives examples of several techniques that can be used to evaluate whether the airborne concentrations of material are representative of the air inhaled by workers. Methods to adjust derived air concentrations for particle size are described. Methods to calibrate for volume of air sampled and estimate the uncertainty in the volume of air sampled are described. Statistical tests for determining minimum detectable concentrations are presented. How to perform an annual evaluation of the adequacy of the air sampling is also discussed.

Hickey, E.E.; Stoetzel, G.A.; Strom, D.J.; Cicotte, G.R. [Pacific Northwest Lab., Richland, WA (United States); Wiblin, C.M. [Advanced Systems Technology, Inc., Atlanta, GA (United States); McGuire, S.A. [Nuclear Regulatory Commission, Washington, DC (United States). Div. of Regulatory Applications

1993-09-01T23:59:59.000Z

373

Statistical characterization of the forces on spheres in an upflow of air  

E-Print Network (OSTI)

The dynamics of a sphere fluidized in a nearly-levitating upflow of air were previously found to be identical to those of a Brownian particle in a two-dimensional harmonic trap, consistent with a Langevin equation [Ojha {\\it et al.}, Nature {\\bf 427}, 521 (2004)]. The random forcing, the drag, and the trapping potential represent different aspects of the interaction of the sphere with the air flow. In this paper we vary the experimental conditions for a single sphere, and report on how the force terms in the Langevin equation scale with air flow speed, sphere radius, sphere density, and system size. We also report on the effective interaction potential between two spheres in an upflow of air.

R. P. Ojha; A. R. Abate; D. J. Durian

2004-06-30T23:59:59.000Z

374

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.

375

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

376

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

377

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

378

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

379

Duct/Air sealing | Open Energy Information  

Open Energy Info (EERE)

Community Login | Sign Up Search Page Edit History Facebook icon Twitter icon DuctAir sealing Jump to: navigation, search TODO: Add description List of DuctAir sealing...

380

Catalysts for Destruction of Air Pollutants  

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

Destruction of Air Pollutants Catalysts for Destruction of Air Pollutants U.S. industries and the U.S. Department of Energy must manage a variety of off-gas wastes consisting of...

Note: This page contains sample records for the topic "air density change" 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

Air Pollution Control Rules (West Virginia)  

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

The listed rules were enacted as directed by the Air Pollution Control Act. Together, these rules guide the monitoring, permitting and compliance enforcement of air quality in the state.

382

Quantifying Precipitation Suppression Due to Air Pollution  

Science Conference Proceedings (OSTI)

Urban air pollution and industrial air pollution have been shown qualitatively to suppress rain and snow. Here, precipitation losses over topographical barriers downwind of major coastal urban areas in California and in the land of Israel that ...

Amir Givati; Daniel Rosenfeld

2004-07-01T23:59:59.000Z

383

Room Air Conditioners | Department of Energy  

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

you need to mount the air conditioner at the narrow end of a long room, then look for a fan control known as "Power Thrust" or "Super Thrust" that sends the cooled air farther...

384

Seneca Compressed Air Energy Storage (CAES) Project  

DOE Green Energy (OSTI)

This document provides specifications for the process air compressor for a compressed air storage project, requests a budgetary quote, and provides supporting information, including compressor data, site specific data, water analysis, and Seneca CAES value drivers.

None

2012-11-30T23:59:59.000Z

385

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...

386

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.

387

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

388

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

389

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

390

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. Seven field audits were conducted to refine the software and methodology as well as assess the savings potential of six common Operation and Maintenance measures. Audit results yielded significant savings with short payback periods. Total estimated savings for the project were 4,056,000 kWh or 49.2% of annual compressor energy for a cost savings of $152,000. Total implementation costs were $94,700 for a project payback period of 0.6 years. Capital benefits of delaying or avoiding the cost of a new compressor might double the energy benefits if a new compressor is being considered. The methodology proved to be a simple and effective audit tool.

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

1997-04-01T23:59:59.000Z

391

Seasonal Simulation of Tropospheric Ozone over the Midwestern and Northeastern United States: An Application of a Coupled Regional Climate and Air Quality Modeling System  

Science Conference Proceedings (OSTI)

The impacts of air pollution on the environment and human health could increase as a result of potential climate change. To assess such possible changes, model simulations of pollutant concentrations need to be performed at climatic (seasonal) ...

Ho-Chun Huang; Xin-Zhong Liang; Kenneth E. Kunkel; Michael Caughey; Allen Williams

2007-07-01T23:59:59.000Z

392

Air Conditioner Compressor Performance Model  

SciTech Connect

During the past three years, the Western Electricity Coordinating Council (WECC) Load Modeling Task Force (LMTF) has led the effort to develop the new modeling approach. As part of this effort, the Bonneville Power Administration (BPA), Southern California Edison (SCE), and Electric Power Research Institute (EPRI) Solutions tested 27 residential air-conditioning units to assess their response to delayed voltage recovery transients. After completing these tests, different modeling approaches were proposed, among them a performance modeling approach that proved to be one of the three favored for its simplicity and ability to recreate different SVR events satisfactorily. Funded by the California Energy Commission (CEC) under its load modeling project, researchers at Pacific Northwest National Laboratory (PNNL) led the follow-on task to analyze the motor testing data to derive the parameters needed to develop a performance models for the single-phase air-conditioning (SPAC) unit. To derive the performance model, PNNL researchers first used the motor voltage and frequency ramping test data to obtain the real (P) and reactive (Q) power versus voltage (V) and frequency (f) curves. Then, curve fitting was used to develop the P-V, Q-V, P-f, and Q-f relationships for motor running and stalling states. The resulting performance model ignores the dynamic response of the air-conditioning motor. Because the inertia of the air-conditioning motor is very small (H<0.05), the motor reaches from one steady state to another in a few cycles. So, the performance model is a fair representation of the motor behaviors in both running and stalling states.

Lu, Ning; Xie, YuLong; Huang, Zhenyu

2008-09-05T23:59:59.000Z

393

Residential Indoor Air Background Data  

Science Conference Proceedings (OSTI)

Soil vapor intrusion, the migration of volatile chemicals from contaminated soil or groundwater into overlying buildings, has become one of the primary exposure pathways of concern for state and federal environmental agencies regulating contaminated sites in the USA. Regulators are requesting comprehensive evaluation of the subsurface vapor-to-indoor air pathway for currently occupied buildings, areas which may be developed in the future, and closed sites for which this pathway was not previously evaluat...

2007-03-16T23:59:59.000Z

394

Clean Air Act. Revision 5  

SciTech Connect

This Reference Book contains a current copy of the Clean Air Act, as amended, and those regulations that implement the statute and appear to be most relevant to DOE activities. The document is provided to DOE and contractor staff for informational purposes only and should not be interpreted as legal guidance. This Reference Book has been completely revised and is current through February 15, 1994.

Not Available

1994-02-15T23:59:59.000Z

395

ARM - Campaign Instrument - dri-air  

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

Send Campaign Instrument : Desert Research Institute Airborne Aerosol Instruments (DRI-AIR) Instrument Categories Aerosols, Airborne Observations Campaigns Aerosol IOP ...

396

South Coast Air Quality Management District  

Science Conference Proceedings (OSTI)

South Coast Air Quality Management District. NVLAP Lab Code: 101567-0. Address and Contact Information: 21865 Copley ...

2013-08-09T23:59:59.000Z

397

Do filters pollute the air? Part 1  

E-Print Network (OSTI)

Air Infiltration Glossary-Italian Edition. TechnicalNote AIC 5.3]. Glossary-Italian Edition. Technical Note AIC

Bek, Gabriel; Schiavon, Stefano

2008-01-01T23:59:59.000Z

398

AIR LEAKAGE OF NEWLY INSTALLED RESIDENTIAL WINDOWS  

E-Print Network (OSTI)

Through Sash/Frame Cracks . Window Operation Types . . . . .Window Operation Types . . . . .Air Leakage of Installed Windows Scattergram of Field

Weidt, John

2013-01-01T23:59:59.000Z

399

Hybrid regional air pollution models  

SciTech Connect

This discussion deals with a family of air quality models for predicting and analyzing the fine particulate loading in the atmosphere, for assessing the extent and degree of visibility impairment, and for determining the potential of pollutants for increasing the acidity of soils and water. The major horizontal scales of interest are from 400km to 2000km; and the time scales may vary from several hours, to days, weeks, and a few months or years, depending on the EPA regulations being addressed. First the role air quality models play in the general family of atmospheric simulation models is described. Then, the characteristics of a well-designed, comprehensive air quality model are discussed. Following this, the specific objectives of this workshop are outlined, and their modeling implications are summarized. There are significant modeling differences produced by the choice of the coordinate system, whether it be the fixed Eulerian system, the moving Lagrangian system, or some hybrid of the two. These three systems are briefly discussed, and a list of hybrid models that are currently in use are given. Finally, the PNL regional transport model is outlined and a number of research needs are listed.

Drake, R.L.

1980-03-01T23:59:59.000Z

400

Mesoscale Climatic Simulation of Surface Air Temperature Cooling by Highly  

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

Mesoscale Climatic Simulation of Surface Air Temperature Cooling by Highly Mesoscale Climatic Simulation of Surface Air Temperature Cooling by Highly Reflective Greenhouses in SE Spain Title Mesoscale Climatic Simulation of Surface Air Temperature Cooling by Highly Reflective Greenhouses in SE Spain Publication Type Journal Article Year of Publication 2013 Authors Campra, Pablo, and Dev Millstein Journal Environmental Science & Technology Volume 47 Issue 21 Pagination 12284 - 12290 Date Published 11/2013 ISSN 0013-936X Keywords buildings, Heat Island Group Abstract A long-term local cooling trend in surface air temperature has been monitored at the largest concentration of reflective greenhouses in the world, at the Province of Almeria, SE Spain, associated with a dramatic increase in surface albedo in the area. The availability of reliable long-term climatic field data at this site offers a unique opportunity to test the skill of mesoscale meteorological models describing and predicting the impacts of land use change on local climate. Using the Weather Research and Forecast (WRF) mesoscale model, we have run a sensitivity experiment to simulate the impact of the observed surface albedo change on monthly and annual surface air temperatures. The model output showed a mean annual cooling of 0.25 °C associated with a 0.09 albedo increase, and a reduction of 22.8 W m-2 of net incoming solar radiation at surface. Mean reduction of summer daily maximum temperatures was 0.49 °C, with the largest single-day decrease equal to 1.3 °C. WRF output was evaluated and compared with observations. A mean annual warm bias (MBE) of 0.42 °C was estimated. High correlation coefficients (R2 > 0.9) were found between modeled and observed values. This study has particular interest in the assessment of the potential for urban temperature cooling by cool roofs deployment projects, as well as in the evaluation of mesoscale climatic models performance.

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401

ENHANCEMENT OF ENVIRONMENTAL SAMPLING THROUGH AN IMPROVED AIR MONITORING TECHNIQUE  

SciTech Connect

Environmental sampling (ES) is a key component of International Atomic Energy Agency (IAEA) safeguarding approaches throughout the world. Performance of ES (e.g. air, water, vegetation, sediments, soil and biota) supports the IAEAs mission of drawing conclusions concerning the absence of undeclared nuclear material or nuclear activities in a State and has been available since the introduction of safeguards strengthening measures approved by the IAEA Board of Governors (1992-1997). A recent step-change improvement in the gathering and analysis of air samples at uranium/plutonium bulk handling facilities is an important addition to the international nuclear safeguards inspector's toolkit. Utilizing commonly used equipment throughout the IAEA network of analytical laboratories for particle analysis, researchers are developing the next generation of ES equipment for air grab and constant samples. Isotopic analysis of collected particles from an Aerosol Contaminant Extractor (ACE) silicon substrate has been performed with excellent results in determining attribute and isotopic composition of chemical elements present in an actual test-bed sample. The new collection equipment will allow IAEA nuclear safeguards inspectors to develop enhanced safeguarding approaches for complicated facilities. This paper will explore the use of air monitoring to establish a baseline environmental signature of a particular facility that could be used for comparison of consistencies in declared operations. The implementation of air monitoring will be contrasted against the use of smear ES when used during unannounced inspections, design information verification, limited frequency unannounced access, and complementary access visits at bulk handling facilities. Technical aspects of the air monitoring device and the analysis of its environmental samples will demonstrate the essential parameters required for successful application of the system.

Hanks, D.

2010-06-07T23:59:59.000Z

402

Zoned heating and air conditioning system  

SciTech Connect

This patent describes a zoned heating and air conditioning system comprising: a central air handling system with an air heating means and an air cooling means and a blower connected to an air duct system; thermostats each have heating and cooling set points, respectively associated with and located in different zones of a building; dampers respectively associated with each building zone positioned in the air duct system. Each damper has an open position allowing air into the respective zone from the duct system and a closed position; relay means for connecting one thermostat to the air handling system upon a call for heating or cooling by one thermostat and disconnecting all other thermostats by connecting one thermostat's connections between the thermostat and air handling system. Only one thermostat is connected to the air handling system at a time and the relay means disconnects one thermostat from the air handling system after one thermostat is satisified; and damper actuating means for unlocking each damper in one building zone responsive actuated by a respective zone thermostat connected to the air handling system by the relay means. The damper actuates means including a damper solenoid for each damper located adjacent each damper and connected to a respective zone thermostat. It unlocks each damper in one building zone responsive to being actuated by the respective zone thermostat and unlocks the dampers in one building zone when one thermostat is actuated while preventing the dampers in another thermostat's building zone from unlocking.

Beachboard, S.A.

1987-06-16T23:59:59.000Z

403

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

404

Intelligent pairing assistant for air operation centers  

Science Conference Proceedings (OSTI)

Within an Air Operations Center (AOC), planners make crucial decisions to create the air plan for any given day. They are expected to complete the plan in part by pairing targeting or collection tasks with the available platforms. Any assistance these ... Keywords: air operations center, intelligent user interface, pairing, reinforcement learning

Jeremy Ludwig; Eric Geiselman

2012-02-01T23:59:59.000Z

405

Air breathing direct methanol fuel cell  

DOE Patents (OSTI)

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.

Ren, Xiaoming (Los Alamos, NM)

2002-01-01T23:59:59.000Z

406

Workshop on indoor air quality research needs  

Science Conference Proceedings (OSTI)

Workshop participants report on indoor air quality research needs including the monitoring of indoor air quality, report of the instrumentation subgroup of indoor air quality, health effects, and the report of the control technology session. Risk analysis studies addressing indoor environments were also summarized. (DLS)

Not Available

1980-01-01T23:59:59.000Z

407

Lattice Boltzmann Method for Multiphase Flows with High Density and Viscosity Ratios  

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

Lattice Boltzmann Method for Multiphase Flows with High Density and Viscosity Ratios Lattice Boltzmann Method for Multiphase Flows with High Density and Viscosity Ratios Seckin Gokaltun, Dwayne McDaniel and David Roelant Florida International University, Miami, FL Background As a result of atomic weapons production, millions of gallons of radioactive waste was generated and stored in underground tanks at various U.S. Department of Energy sites. Department of Energy is currently in the process of transferring the waste from single shell tanks to double shell tanks. Various waste retrieval and processing methods are employed during the transfer of the waste. One such method, pulsed-air mixing, involves injection of discrete pulses of compressed air or inert gas at the bottom of the tank to produce large bubbles that rise due to buoyancy and mix the waste in the tank

408

Weather induced effects on extensive air showers observed with the surface detector of the Pierre Auger Observatory  

E-Print Network (OSTI)

The rate of events measured with the surface detector of the Pierre Auger Observatory is found to be modulated by the weather conditions. This effect is due to the increasing amount of matter traversed by the shower as the ground pressure increases and to the inverse proportionality of the Moliere radius to the air density near ground. Air-shower simulations with different realistic profiles of the atmosphere support this interpretation of the observed effects.

Carla Bleve; for the Pierre Auger Collaboration

2007-06-11T23:59:59.000Z

409

Analysis of U.S. residential air leakage database  

E-Print Network (OSTI)

installing air and vapor barriers, and sealing ducts.that will reduce air in?ltration such as sealing air leaks,

Chan, Wanyu R.; Price, Phillip N.; Sohn, Michael D.; Gadgil, Ashok J.

2003-01-01T23:59:59.000Z

410

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...

411

Investigation of residential central air conditioning load shapes in NEMS  

E-Print Network (OSTI)

of Residential Central Air Conditioning Load Shapes in NEMSof Residential Central Air Conditioning Load Shapes in NEMSof Residential Central Air Conditioning Load Shapes in NEMS

Hamachi LaCommare, Kristina; Marnay, Chris; Gumerman, Etan; Chan, Peter; Rosenquist, Greg; Osborn, Julie

2002-01-01T23:59:59.000Z

412

Performance of underfloor air distribution: Results of a field study  

E-Print Network (OSTI)

Refrigerating, and Air Conditioning Engineers. AtlantaRefrigerating, and Air Conditioning Engineers. AtlantaRefrigerating, and Air-Conditioning Engineers, Inc. ,

Fisk, William; Faulkner, David; Sullivan, Douglas

2004-01-01T23:59:59.000Z

413

Air Products Hydrogen Energy Systems | Department of Energy  

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

Air Products Hydrogen Energy Systems Air Products Hydrogen Energy Systems Hydrogen Infrastructure Air Products Hydrogen Energy Systems More Documents & Publications Quadrennial...

414

Shale Gas Development Challenges: Air | Department of Energy  

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

Shale Gas Development Challenges: Air Shale Gas Development Challenges: Air Shale Gas Development Challenges: Air More Documents & Publications Natural Gas from Shale: Questions...

415

buy Adekom VSD Air Compressor - high quality Manufacturers ...  

U.S. Energy Information Administration (EIA)

Adekom VSD Air Compressor trade offers directory and Adekom VSD Air Compressor business offers list. Trade leads from Adekom VSD Air Compressor ...

416

Form-stable crystalline polymer pellets for thermal energy storage: high density polyethylene intermediate products. Final report, October 1, 1977--January 31, 1978  

DOE Green Energy (OSTI)

The primary objectives of this program were to demonstrate: (1) that form-stable high density polyethylene (HDPE), which has been shown to have desirable properties as a phase-change type of thermal energy storage material, could be produced by processing in a polyethylene plant for a projected price near 26 cents/lb; and (2) that the raw material, ethylene, will be available in the very long-term from alternate sources (other than petroleum and natural gas). These objectives were accomplished. Production of useful, form-stable HDPE pellets by radiation cross-linking was demonstrated. Such pellets are estimated to be obtainable at 26 cents/lb, using large-volume (> or equal to 10,000,000 lb/yr) in-plant processing. Well-developed technologies exist for obtaining ethylene from coal and plant (or biomass) sources, thus assuring its long-term availability and therefore that of polyethylene. A cost-benefit analysis of the HDPE thermal energy storage system was conducted over its 120 to 140/sup 0/C optimum operating range which is most suited for absorption air conditioning. The HDPE is more cost effective than either rocks, ethylene glycol, or pressurized water and is even competitive with a hypothetical 5 cents/lb salt-hydrate melting in this temperature range. These results applied, as appropriate, to both air and liquid transfer systems.

Botham, R.A.; Ball, G.L. III; Jenkins, G.H.; Salyer, I.O.

1978-01-01T23:59:59.000Z

417

Better Unitary Equipment Air-Handlers for Efficiency and Humidity Control  

E-Print Network (OSTI)

Regulatory requirements drive unitary equipment design. For residential equipment, SEER reflects performance at moderate temperatures, and is largely independent of high temperature efficiency and high latent heat removal capability. The test procedure gives too little credit for advanced air handlers that reduce air conditioning load and facilitate adaptive humidity control through automatic fan speed adjustment. DC permanent magnet variable speed motors have much lower market share than less efficient permanent split capacitor designs: changing saves 15% - 25% at high fan speed, and at least 50% at lower speeds (high latent cooling). Humidistats allow dynamic humidity control by reducing air flow, cooling the evaporator. Following market transformation to increase market share, federal equipment stanards should be augmented to include specific air handler air flow efficiency levels, such as 0.2 watts/cfm at size-dependent static pressures. We estimate that customer payback will be less than three years in a mature market.

Sachs, H. M.

2002-01-01T23:59:59.000Z

418

Heating, ventilation and air conditioning systems  

DOE Green Energy (OSTI)

A study is made of several outstanding issues concerning the commercial development of environmental control systems for electric vehicles (EVs). Engineering design constraints such as federal regulations and consumer requirements are first identified. Next, heating and cooling loads in a sample automobile are calculated using a computer model available from the literature. The heating and cooling loads are then used as a basis for estimating the electrical consumption that is to be expected for heat pumps installed in EVs. The heat pump performance is evaluated using an automobile heat pump computer model which has been developed recently at Oak Ridge National Laboratory (ORNL). The heat pump design used as input to the model consists of typical finned-tube heat exchangers and a hermetic compressor driven by a variable-speed brushless dc motor. The simulations suggest that to attain reasonable system efficiencies, the interior heat exchangers that are currently installed as automobile air conditioning will need to be enlarged. Regarding the thermal envelope of the automobile itself, calculations are made which show that considerable energy savings will result if steps are taken to reduce {open_quote}hot soak{close_quote} temperatures and if the outdoor air ventilation rate is well controlled. When these changes are made, heating and cooling should consume less than 10% of the total stored electrical energy for steady driving in most U.S. climates. However, this result depends strongly upon the type of driving: The fraction of total power for heating and cooling ({open_quote}range penalty{close_quote}) increases sharply for driving scenarios having low average propulsion power, such as stop-and-go driving.

Kyle, D.M. [Oak Ridge National Lab., TN (United States); Sullivan, R.A. [Dept. of Energy, Washington, DC (United States)

1993-02-01T23:59:59.000Z

419

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:

420

Laboratory Study of Premixed H2-Air and H2-N2-Air Flames in a...  

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

of Premixed H2-Air and H2-N2-Air Flames in a Low-Swirl Injector for Ultra-Low Emissions Gas Turbines Title Laboratory Study of Premixed H2-Air and H2-N2-Air Flames in a Low-Swirl...

Note: This page contains sample records for the topic "air density change" 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

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

422

Link Climate Change and Human Health  

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

Make Our Science Accessible Make Our Science Accessible Link Climate Change & Health Provide Data and Tools Coordinate Internationally Link Climate Change and Human Health Print E-mail Health News Check out the latest climate change and human health news and announcements in our Health News Feed. Climate change poses unique challenges to human health. Unlike health threats caused by a particular toxin or disease pathogen, there are many ways that climate change can lead to potentially harmful health effects. Direct health impacts may include increased illnesses and deaths from extreme heat events, injuries and deaths from extreme weather events, and respiratory illnesses due to changes in air quality Indirect health impacts include illnesses and deaths that may arise from

423

Automatic monitoring of selected indoor air parameters at three apartment complexes  

SciTech Connect

The impact of three different ventilation systems on the temperature and humidity of three similar apartment complexes is investigated in this study. Each complex has six apartments. The ventilation systems are: natural ventilation, mechanical exhaust ventilation, and mechanical supply and exhaust ventilation. The computer controlled data collection system measures the ventilation rate, relative humidity, indoor air temperature, wind speed, wind direction, outdoor temperature, and humidity. The air change rate depends mainly on the habits of the tenants. The mean air change rate of the houses was between 0.1 to 0.8 ac/h. Great daily variation of the air exchange was observed in the data. Negative correlation between relative humidity and ventilation was very significant in 27 out of 47 cases. Only two cases had very significant positive correlation between ventilation and humidity. Mechanical supply and exhaust ventilation have the greatest variation in ventilation/relative humidity relations.

Savolainen, T.; Raunemaa, T (Univ. of Kuopio (Finland)); Wellman, K. (Technical Research Centre of Finland, Helsinki (Finland))

1989-01-01T23:59:59.000Z

424

Development of an Air Transport Type A Fissile Package  

SciTech Connect

This paper presents the summary of testing by the Savannah River National Laboratory (SRNL) to support development of a light weight (<140 lbs) air transport qualified Type A Fissile Packaging. The package design incorporates features and materials specifically designed to minimize packaging weight. The light weight package is being designed to provide confinement to the contents when subjected to the normal and hypothetical conditions required of an air transportable Type A Fissile radioactive material shipping package. The objective of these tests was to provide design input to the final design for the LORX Type A Fissile Air Transport Packaging when subjected to the performance requirements of the drop, crush and puncture probe test of 10CFR71. The post test evaluation of the prototype packages indicates that all of the tested designs would satisfactorily confine the content within the packaging. The differences in the performance of the prototypes varied significantly depending on the core materials and their relative densities. Information gathered from these tests is being used to develop the final design for the Department of Homeland Security.

Blanton, P.; Ebert, K.

2011-07-13T23:59:59.000Z

425

Energy Density Functional for Nuclei and Neutron Stars  

Science Conference Proceedings (OSTI)

Background: Recent observational data on neutron star masses and radii provide stringent constraints on the equation of state of neutron rich matter [ Annu. Rev. Nucl. Part. Sci. 62 485 (2012)]. Purpose: We aim to develop a nuclear energy density functional that can be simultaneously applied to finite nuclei and neutron stars. Methods: We use the self-consistent nuclear density functional theory (DFT) with Skyrme energy density functionals and covariance analysis to assess correlations between observables for finite nuclei and neutron stars. In a first step two energy functionals a high density energy functional giving reasonable neutron properties, and a low density functional fitted to nuclear properties are matched. In a second step, we optimize a new functional using exactly the same protocol as in earlier studies pertaining to nuclei but now including neutron star data. This allows direct comparisons of performance of the new functional relative to the standard one. Results: The new functional TOV-min yields results for nuclear bulk properties (energy, rms radius, diffraction radius, and surface thickness) that are of the same quality as those obtained with the established Skyrme functionals, including SV-min. When comparing SV-min and TOV-min, isoscalar nuclear matter indicators vary slightly while isovector properties are changed considerably. We discuss neutron skins, dipole polarizability, separation energies of the heaviest elements, and proton and neutron drip lines. We confirm a correlation between the neutron skin of 208Pb and the neutron star radius. Conclusions: We demonstrate that standard energy density functionals optimized to nuclear data do not carry information on the expected maximum neutron star mass, and that predictions can only be made within an extremely broad uncertainty band. For atomic nuclei, the new functional TOV-min performs at least as well as the standard nuclear functionals, but it also reproduces expected neutron star data within assumed error bands. This functional is expected to yield more reliable predictions in the region of very neutron rich heavy nuclei.

Erler, J. [UTK/ORNL/German Cancer Research Center-Heidelberg; Horowitz, C. J. [UTK/ORNL/Indiana University; Nazarewicz, Witold [UTK/ORNL/University of Warsaw; Rafalski, M. [UTK/ORNL; Reinhard, P.-G. [Universitat Erlangen, Germany

2013-01-01T23:59:59.000Z

426

Two-phase flow and transport in the air cathode of proton exchange membrane fuel cells  

DOE Green Energy (OSTI)

Two-phase flow and transport of reactants and products in the air cathode of proton exchange membrane (PEM) fuel cells is studied analytically and numerically. Four regimes of water distribution and transport are classified by defining three threshold current densities and a maximum current density. They correspond to first appearance of liquid water at the membrane/cathode interface, extension of the gas-liquid two-phase zone to the cathode/channel interface, saturated moist air exiting the gas channel, and complete consumption of oxygen by the electrochemical reaction. When the cell operates above the first threshold current density, liquid water appears and a two-phase zone forms within the porous cathode. A two-phase, multi-component mixture model in conjunction with a finite-volume-based computational fluid dynamics (CFD) technique is applied to simulate the cathode operation in this regime. The model is able to handle the situation where a single-phase region co-exists with a two-phase zone in the air cathode. For the first time, the polarization curve as well as water and oxygen concentration distributions encompassing both single- and two-phase regimes of the air cathode are presented. Capillary action is found to be the dominant mechanism for water transport inside the two-phase zone. The liquid water saturation within the cathode is predicted to reach 6.3% at 1.4 A/cm{sup 2}.

WANG,Z.H.; WANG,C.Y.; CHEN,KEN S.

2000-03-20T23:59:59.000Z

427

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 is offered based on the demands of saving energy. The two systems are very similar, which is analyzed in this paper. Using actual engineering, we compute the air flow rate, cold load and energy consumption in detail, and provide some good conclusions.

Guang, L.; Li, R.

2006-01-01T23:59:59.000Z

428

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

429

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

430

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"

431

Alpha-environmental continuous air monitor inlet  

DOE Patents (OSTI)

A wind deceleration and protective shroud that provides representative samples of ambient aerosols to an environmental continuous air monitor (ECAM) has a cylindrical enclosure mounted to an input on the continuous air monitor, the cylindrical enclosure having shrouded nozzles located radially about its periphery. Ambient air flows, often along with rainwater flows into the nozzles in a sampling flow generated by a pump in the continuous air monitor. The sampling flow of air creates a cyclonic flow in the enclosure that flows up through the cylindrical enclosure until the flow of air reaches the top of the cylindrical enclosure and then is directed downward to the continuous air monitor. A sloped platform located inside the cylindrical enclosure supports the nozzles and causes any moisture entering through the nozzle to drain out through the nozzles.

Rodgers, John C. (Santa Fe, NM)

2003-01-01T23:59:59.000Z

432

Industrial Compressed Air System Energy Efficiency Guidebook.  

DOE Green Energy (OSTI)

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

433

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"

434

GyPSuM: A Detailed Tomographic Model of Mantle Density and Seismic Wave Speeds  

SciTech Connect

GyPSuM is a tomographic model fo mantle seismic shear wave (S) speeds, compressional wave (P) speeds and detailed density anomalies that drive mantle flow. the model is developed through simultaneous inversion of seismic body wave travel times (P and S) and geodynamic observations while considering realistic mineral physics parameters linking the relative behavior of mantle properties (wave speeds and density). Geodynamic observations include the (up to degree 16) global free-air gravity field, divergence of the tectonic plates, dynamic topography of the free surface, and the flow-induced excess ellipticity of the core-mantle boundary. GyPSuM is built with the philosophy that heterogeneity that most closely resembles thermal variations is the simplest possible solution. Models of the density field from Earth's free oscillations have provided great insight into the density configuration of the mantle; but are limited to very long-wavelength solutions. Alternatively, simply scaling higher resolution seismic images to density anomalies generates density fields that do not satisfy geodynamic observations. The current study provides detailed density structures in the mantle while directly satisfying geodynamic observations through a joint seismic-geodynamic inversion process. Notable density field observations include high-density piles at the base of the superplume structures, supporting the fundamental results of past normal mode studies. However, these features are more localized and lower amplitude than past studies would suggest. When we consider all seismic anomalies in GyPSuM, we find that P and S-wave speeds are strongly correlated throughout the mantle. However, correlations between the high-velocity S zones in the deep mantle ({approx} 2000 km depth) and corresponding P-wave anomalies are very low suggesting a systematic divergence from simplified thermal effects in ancient subducted slab anomalies. Nevertheless, they argue that temperature variations are the primary cause of P-wave, S-wave, and density anomalies in the mantle.

Simmons, N A; Forte, A M; Boschi, L; Grand, S P

2010-03-30T23:59:59.000Z

435

Demonstration and Testing of ClimaStat for Improved Rooftop Air-Conditioning Efficeincy  

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

Demonstration and Testing of ClimaStat® for Improved Rooftop Air-Conditioning Efficiency Presented at IA Technology Deployment Working Group Meeting March 15, 2012 By Dan Howett, PE Oak Ridge National Laboratory Demonstration/Testing of ClimaStat ® for Improved Efficiency of RTU Air Conditioners * Technology from Advantek Consulting - Patented by Dr. Michael West in 2003. (US Patent #6427454) - Originally demonstrated under DOE's Inventions & Innovations program. * Current demonstration sponsored by DOD's ESTCP program * Uses off-the-shelf components to either... - Modify existing packaged air conditioners, or - Incorporate changes into new RTU equipment before installation * Initial tests show 15% improvement in HVAC efficiency.

436

Demonstration and Testing of ClimaStat for Improved Rooftop Air-Conditioning Efficeincy  

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

Demonstration and Testing of ClimaStat® for Improved Rooftop Air-Conditioning Efficiency Presented at IA Technology Deployment Working Group Meeting March 15, 2012 By Dan Howett, PE Oak Ridge National Laboratory Demonstration/Testing of ClimaStat ® for Improved Efficiency of RTU Air Conditioners * Technology from Advantek Consulting - Patented by Dr. Michael West in 2003. (US Patent #6427454) - Originally demonstrated under DOE's Inventions & Innovations program. * Current demonstration sponsored by DOD's ESTCP program * Uses off-the-shelf components to either... - Modify existing packaged air conditioners, or - Incorporate changes into new RTU equipment before installation * Initial tests show 15% improvement in HVAC efficiency.

437

Estimating the Time Dependence of Air Temperature Using Daily Maxima and Minima: A Comparison of Three Methods  

Science Conference Proceedings (OSTI)

Many models in a variety of disciplines require air temperature throughout the day as an input, yet often the only data available are daily extrema. Several methods for estimating the diurnal change in temperature from daily extrema have been ...

J. M. Baker; D. C. Reicosky; D. G. Baker

1988-12-01T23:59:59.000Z

438

High Density Fuel Development for Research Reactors  

SciTech Connect

An international effort to develop, qualify, and license high and very high density fuels has been underway for several years within the framework of multi-national RERTR programs. The current development status is the result of significant contributions from many laboratories, specifically CNEA in Argentina, AECL in Canada, CEA in France, TUM in Germany, KAERI in Korea, VNIIM, RDIPE, IPPE, NCCP and RIARR in Russia, INL, ANL and Y-12 in USA. These programs are mainly engaged with UMo dispersion fuels with densities from 6 to 8 gU/cm3 (high density fuel) and UMo monolithic fuel with density as high as 16 gU/cm3 (very high density fuel). This paper, mainly focused on the French & US programs, gives the status of high density UMo fuel development and perspectives on their qualification.

Daniel Wachs; Dennis Keiser; Mitchell Meyer; Douglas Burkes; Curtis Clark; Glenn Moore; Jan-Fong Jue; Totju Totev; Gerard Hofman; Tom Wiencek; Yeon So Kim; Jim Snelgrove

2007-09-01T23:59:59.000Z

439

The Quantum Energy Density: Improved E  

Science Conference Proceedings (OSTI)

We establish a physically meaningful representation of a quantum energy density for use in Quantum Monte Carlo calculations. The energy density operator, dened in terms of Hamiltonian components and density operators, returns the correct Hamiltonian when integrated over a volume containing a cluster of particles. This property is demonstrated for a helium-neon \\gas," showing that atomic energies obtained from the energy density correspond to eigenvalues of isolated systems. The formation energies of defects or interfaces are typically calculated as total energy dierences. Using a model of delta-doped silicon (where dopant atoms form a thin plane) we show how interfacial energies can be calculated more eciently with the energy density, since the region of interest is small. We also demonstrate how the energy density correctly transitions to the bulk limit away from the interface where the correct energy is obtainable from a separate total energy calculation.

Krogel, Jaron [University of Illinois, Urbana-Champaign; Yu, Min [Lawrence Berkeley National Laboratory (LBNL); Kim, Jeongnim [ORNL; Ceperley, David M. [University of Illinois, Urbana-Champaign

2013-01-01T23:59:59.000Z

440

Air-Con International: Noncompliance Determination and Proposed...  

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

to Air-Con International finding that a variety of central air conditioners and air conditioning heat pumps distributed under the Air-Con private label do not comport...

Note: This page contains sample records for the topic "air density change" 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

Air-Source Heat Pumps | Department of Energy  

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

Air-Source Heat Pumps Air-Source Heat Pumps August 19, 2013 - 11:03am Addthis Air-source heat pumps transfer heat between the inside of a building and the outside air. How...

442

Dynamic Evolution for Risk-Neutral Densities  

E-Print Network (OSTI)

We solved the scaled formulation for problems (7) and (10) and obtained the dynamic evolution for the densities (see Figure 1). For this data set, we.

443

Some challenges for Nuclear Density Functional Theory  

E-Print Network (OSTI)

We discuss some of the challenges that the DFT community faces in its quest for the truly universal energy density functional applicable over the entire nuclear chart.

T. Duguet; K. Bennaceur; T. Lesinski; J. Meyer

2006-06-20T23:59:59.000Z

444

Application of Precession Electron Diffraction in Density ...  

Science Conference Proceedings (OSTI)

In this paper, GND density calculations obtained using SEM-based EBSD and transmission electron microscope-based PED techniques in ?+? titanium alloys...

445

MECHANICALLY ROBUST, ELECTRICALLY CONDUCTIVE ULTRALOW-DENSITY ...  

A method of making a mechanically robust, electrically conductive ultralow-density carbon nanotube-based aerogel, including the steps of dispersing nanotubes in an ...

446

Betatron radiation from density tailored plasmas  

E-Print Network (OSTI)

Betatron radiation from density tailored plasmas K. Tathe resulting betatron radiation spectrum can therefore bepro?le, the betatron radiation emitted by theses electrons

Ta Phuoc, Kim

2010-01-01T23:59:59.000Z

447

3-D capacitance density imaging system  

DOE Patents (OSTI)

A three-dimensional capacitance density imaging of a gasified bed or the like in a containment vessel is achieved using a plurality of electrodes provided circumferentially about the bed in levels and along the bed in channels. The electrodes are individually and selectively excited electrically at each level to produce a plurality of current flux field patterns generated in the bed at each level. The current flux field patterns are suitably sensed and a density pattern of the bed at each level determined. By combining the determined density patterns at each level, a three-dimensional density image of the bed is achieved. 7 figs.

Fasching, G.E.

1988-03-18T23:59:59.000Z

448

High Energy Density Secondary Lithium Batteries  

High Energy Density Secondary Lithium Batteries Note: The technology described above is an early stage opportunity. Licensing rights to this intellectual property may

449

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.

450

Pattern formation by injection of air in a non-Brownian suspension  

E-Print Network (OSTI)

We study the injection of air in a granular suspension. We use a linear Hele-Saw cell filled with a suspension which is displaced by air, leading to a Saffman-Taylor (fingering) instability. For the suspension, we use an iso-dense mixture where the fluid and the particles have the same density. The volume fraction of particles can thus be adjusted over a wide range. We discuss the question of an effective rheology inside the cell as well as the pattern formation as a function of the granular compacity. We finally report results on the finger width for stable fingers and the thresholds for their destabilization.

C. Chevalier; A. Lindner; E. Clement

2005-04-29T23:59:59.000Z

451

A New Approach to Mass Measurements of UHECR: Horizontal Air Showers  

E-Print Network (OSTI)

The role of Horizontal Showers induced by cosmic rays is discussed in detail. A new approach to the calculation of the muon component in horizontal air showers induced by protons, heavier nuclei or photons is presented which allows a simple analytical evaluation of the muon density profiles at ground level. The results of the first application of these results to horizontal air showers detected at the Haverah Park Array by the recently started {\\sl Leeds-Santiago collaboration}, leading to important restrictions on composition at ultra high energies, are reported.

Enrique Zas

2000-11-22T23:59:59.000Z

452

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 non-uniform so that residents usually feel uncomfortable. The distribution of indoor airflow by cold air distribution is researched in this paper. We study indoor air distribution under different low temperature air supply conditions by numerical simulation. The simulated results agree well with the experiments.

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

2006-01-01T23:59:59.000Z

453

Air Force Announces Funding for Alternative Energy Research ...  

Air Force Announces Funding for Alternative Energy Research & Development. December 16, 2013. The Air Force Research Laboratory (AFRL) has ...

454

Night air cargo operations flyover noise mitigation by a municipality  

Science Conference Proceedings (OSTI)

A 1981 Air Force Draft Environmental ImpactAnalysis (DEIA) on converting Rickenbacker Air National Guard Base (RANGB

Angelo J. Campanella

1985-01-01T23:59:59.000Z

455

AIR INGRESS ANALYSIS: PART 2 COMPUTATIONAL FLUID DYNAMIC MODELS  

Science Conference Proceedings (OSTI)

The Idaho National Laboratory (INL), under the auspices of the U.S. Department of Energy, is performing research and development that focuses on key phenomena important during potential scenarios that may occur in very high temperature reactors (VHTRs). Phenomena Identification and Ranking Studies to date have ranked an air ingress event, following on the heels of a VHTR depressurization, as important with regard to core safety. Consequently, the development of advanced air ingress-related models and verification and validation data are a very high priority. Following a loss of coolant and system depressurization incident, air will enter the core of the High Temperature Gas Cooled Reactor through the break, possibly causing oxidation of the in-the core and reflector graphite structure. Simple core and plant models indicate that, under certain circumstances, the oxidation may proceed at an elevated rate with additional heat generated from the oxidation reaction itself. Under postulated conditions of fluid flow and temperature, excessive degradation of the lower plenum graphite can lead to a loss of structural support. Excessive oxidation of core graphite can also lead to the release of fission products into the confinement, which could be detrimental to a reactor safety. Computational fluid dynamic model developed in this study will improve our understanding of this phenomenon. This paper presents two-dimensional and three-dimensional CFD results for the quantitative assessment of the air ingress phenomena. A portion of results of the density-driven stratified flow in the inlet pipe will be compared with results of the experimental results.

Chang H. Oh; Eung S. Kim; Richard Schultz; Hans Gougar; David Petti; Hyung S. Kang

2011-01-01T23:59:59.000Z

456

Efficient high density train operations  

DOE Patents (OSTI)

The present invention provides methods for preventing low train voltages and managing interference, thereby improving the efficiency, reliability, and passenger comfort associated with commuter trains. An algorithm implementing neural network technology is used to predict low voltages before they occur. Once voltages are predicted, then multiple trains can be controlled to prevent low voltage events. Further, algorithms for managing inference are presented in the present invention. Different types of interference problems are addressed in the present invention such as "Interference. During Acceleration", "Interference Near Station Stops", and "Interference During Delay Recovery." Managing such interference avoids unnecessary brake/acceleration cycles during acceleration, immediately before station stops, and after substantial delays. Algorithms are demonstrated to avoid oscillatory brake/acceleration cycles due to interference and to smooth the trajectories of closely following trains. This is achieved by maintaining sufficient following distances to avoid unnecessary braking/accelerating. These methods generate smooth train trajectories, making for a more comfortable ride, and improve train motor reliability by avoiding unnecessary mode-changes between propulsion and braking. These algorithms can also have a favorable impact on traction power system requirements and energy consumption.

Gordon, Susanna P. (Oakland, CA); Evans, John A. (Hayward, CA)

2001-01-01T23:59:59.000Z

457

Seneca Compressed Air Energy Storage (CAES) Project  

SciTech Connect

Compressed Air Energy Storage (CAES) is a hybrid energy storage and generation concept that has many potential benefits especially in a location with increasing percentages of intermittent wind energy generation. The objectives of the NYSEG Seneca CAES Project included: for Phase 1, development of a Front End Engineering Design for a 130MW to 210 MW utility-owned facility including capital costs; project financials based on the engineering design and forecasts of energy market revenues; design of the salt cavern to be used for air storage; draft environmental permit filings; and draft NYISO interconnection filing; for Phase 2, objectives included plant construction with a target in-service date of mid-2016; and for Phase 3, objectives included commercial demonstration, testing, and two-years of performance reporting. This Final Report is presented now at the end of Phase 1 because NYSEG has concluded that the economics of the project are not favorable for development in the current economic environment in New York State. The proposed site is located in NYSEGs service territory in the Town of Reading, New York, at the southern end of Seneca Lake, in New York States Finger Lakes region. The landowner of the proposed site is Inergy, a company that owns the salt solution mining facility at this property. Inergy would have developed a new air storage cavern facility to be designed for NYSEG specifically for the Seneca CAES project. A large volume, natural gas storage facility owned and operated by Inergy is also located near this site and would have provided a source of high pressure pipeline quality natural gas for use in the CAES plant. The site has an electrical take-away capability of 210 MW via two NYSEG 115 kV circuits located approximately one half mile from the plant site. Cooling tower make-up water would have been supplied from Seneca Lake. NYSEGs engineering consultant WorleyParsons Group thoroughly evaluated three CAES designs and concluded that any of the designs would perform acceptably. Their general scope of work included development of detailed project construction schedules, capital cost and cash flow estimates for both CAES cycles, and development of detailed operational data, including fuel and compression energy requirements, to support dispatch modeling for the CAES cycles. The Dispatch Modeling Consultant selected for this project was Customized Energy Solutions (CES). Their general scope of work included development of wholesale electric and gas market price forecasts and development of a dispatch model specific to CAES technologies. Parsons Brinkerhoff Energy Storage Services (PBESS) was retained to develop an air storage cavern and well system design for the CAES project. Their general scope of work included development of a cavern design, solution mining plan, and air production well design, cost, and schedule estimates for the project. Detailed Front End Engineering Design (FEED) during Phase 1 of the project determined that CAES plant capital equipment costs were much greater than the $125.6- million originally estimated by EPRI for the project. The initial air storage cavern Design Basis was increased from a single five million cubic foot capacity cavern to three, five million cubic foot caverns with associated air production wells and piping. The result of this change in storage cavern Design Basis increased project capital costs significantly. In addition, the development time required to complete the three cavern system was estimated at approximately six years. This meant that the CAES plant would initially go into service with only one third of the required storage capacity and would not achieve full capability until after approximately five years of commercial operation. The market price forecasting and dispatch modeling completed by CES indicated that the CAES technologies would operate at only 10 to 20% capacity factors and the resulting overall project economics were not favorable for further development. As a result of all of these factors, the Phase 1 FEED developed an installe

None

2012-11-30T23:59:59.000Z

458

Air and water cooled modulator  

DOE Patents (OSTI)

A compact high power magnetic compression apparatus and method are disclosed for delivering high voltage pulses of short duration at a high repetition rate and high peak power output which does not require the use of environmentally unacceptable fluids such as chlorofluorocarbons either as a dielectric or as a coolant, and which discharges very little waste heat into the surrounding air. A first magnetic switch has cooling channels formed therethrough to facilitate the removal of excess heat. The first magnetic switch is mounted on a printed circuit board. A pulse transformer comprised of a plurality of discrete electrically insulated and magnetically coupled units is also mounted on said printed board and is electrically coupled to the first magnetic switch. The pulse transformer also has cooling means attached thereto for removing heat from the pulse transformer. A second magnetic switch also having cooling means for removing excess heat is electrically coupled to the pulse transformer. Thus, the present invention is able to provide high voltage pulses of short duration at a high repetition rate and high peak power output without the use of environmentally unacceptable fluids and without discharging significant waste heat into the surrounding air. 9 figs.

Birx, D.L.; Arnold, P.A.; Ball, D.G.; Cook, E.G.

1995-09-05T23:59:59.000Z

459

Air and water cooled modulator  

DOE Patents (OSTI)

A compact high power magnetic compression apparatus and method for delivering high voltage pulses of short duration at a high repetition rate and high peak power output which does not require the use of environmentally unacceptable fluids such as chlorofluorocarbons either as a dielectric or as a coolant, and which discharges very little waste heat into the surrounding air. A first magnetic switch has cooling channels formed therethrough to facilitate the removal of excess heat. The first magnetic switch is mounted on a printed circuit board. A pulse transformer comprised of a plurality of discrete electrically insulated and magnetically coupled units is also mounted on said printed board and is electrically coupled to the first magnetic switch. The pulse transformer also has cooling means attached thereto for removing heat from the pulse transformer. A second magnetic switch also having cooling means for removing excess heat is electrically coupled to the pulse transformer. Thus, the present invention is able to provide high voltage pulses of short duration at a high repetition rate and high peak power output without the use of environmentally unacceptable fluids and without discharging significant waste heat into the surrounding air.

Birx, Daniel L. (Oakley, CA); Arnold, Phillip A. (Livermore, CA); Ball, Don G. (Livermore, CA); Cook, Edward G. (Livermore, CA)

1995-01-01T23:59:59.000Z

460

Air Force Enhanced Use Lease  

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

1 1 Air Force Enhanced Use Lease Mr. Brian Brown 16 Oct. 12 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 2 Agenda  Brian Brown  Enhanced Use Lease (EUL) Overview  Energy EULs  EUL Goals  David Swanson  Energy EUL Market Drivers  Current EUL Projects  Partnering with the Air Force  Contact Information 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 3 Overview  Authority 10 USC 2667  An EUL is a lease  By the government  Of "non-excess" property  Under the control of the government  To a public or private sector lessee  In exchange for fair market value rental payments in cash and/or in kind consideration 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

Note: This page contains sample records for the topic "air density change" 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

Ambient Operation of Li/Air Batteries  

Science Conference Proceedings (OSTI)

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

462

DOE Requires Air-Con International to Cease Sales of Inefficient Air  

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

Requires Air-Con International to Cease Sales of Inefficient Requires Air-Con International to Cease Sales of Inefficient Air Conditioners and Proposes Penalties DOE Requires Air-Con International to Cease Sales of Inefficient Air Conditioners and Proposes Penalties September 21, 2010 - 6:43pm Addthis The Department has issued a Notice of Noncompliance Determination and Proposed Civil Penalty to Air-Con, International, requiring Air-Con to cease the sale of certain air-conditioning systems in the United States and proposing a civil penalty of $231,090 for sales of these products in violation of the applicable energy efficiency standards. This action reflects the Department's continued commitment to act aggressively to remove unlawful products from the market. In March, 2010, the Department issued a subpoena requiring Air-Con to

463

VOYAGER 2 OBSERVES A LARGE DENSITY INCREASE IN THE HELIOSHEATH  

Science Conference Proceedings (OSTI)

Voyager 2 (V2) entered the heliosheath in 2007 August at roughly the same time solar minimum conditions were reaching the outer heliosphere. Soon after crossing the termination shock the solar wind density at Voyager decreased by a factor of two and the temperature decreased by a factor of three. At the beginning of 2011 the plasma density in the heliosheath began to increase and in mid-2012 it was up by more than a factor of two. The temperature rose by about 50% and the speed remained constant, although the flow direction continues to turn tailward. These changes may signal the end of solar minimum conditions at V2 in the heliosheath, although we do not understand why the speed did not decrease. The increased dynamic pressure has lead to an outward movement of the termination shock from its very compressed state at solar minimum.

Richardson, J. D. [Kavli Center for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA 02139 (United States); Wang, C., E-mail: jdr@space.mit.edu, E-mail: cw@spaceweather.ac.cn [State Key Laboratory for Space Weather, Chinese Academy of Sciences, Beijing (China)

2012-11-01T23:59:59.000Z

464

Lab announces security changes  

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

Lab announces security changes Lab announces security changes The Laboratory is implementing several changes to its security procedures as the result of a recent security...

465

High density laser-driven target  

DOE Patents (OSTI)

A high density target for implosion by laser energy composed of a central quantity of fuel surrounded by a high-Z pusher shell with a low-Z ablator-pusher shell spaced therefrom forming a region filled with low-density material.

Lindl, John D. (San Ramon, CA)

1981-01-01T23:59:59.000Z

466

Laser light absorption with density profile modifications  

SciTech Connect

Two-dimensional computer simulations studied plasma heating by electron plasma waves. The results emphasize the importance of nonlinear steepening of the density profile near the critical density. A typical simulation result is presented in order to illustrate these profile modifications. It is shown that large dc magnetic field generation is an inherent property of the absorption of obliquely-incident light. (MOW)

Kruer, W.; Valeo, E.; Estabrook, K.; Langdon, B.; Lasinski, B.

1974-12-01T23:59:59.000Z

467

Estimate of dielectric density using spectroscopic ellipsometry  

Science Conference Proceedings (OSTI)

The optical dielectric functions for hafnium oxide and hafnium silicate films were extracted from spectroscopic ellipsometry measurements and the density then calculated using a previously proposed method. The values obtained were then compared to those ... Keywords: Density, Gadolinium oxide, Hafnium silicate, Medium energy ion scattering, Spectroscopic ellipsometry, X-ray reflectometry

W. Davey; O. Buiu; M. Werner; I. Z. Mitrovic; S. Hall; P. Chalker

2009-07-01T23:59:59.000Z

468

Effects of Vegetation Structure and Elevation on Lower Keys Marsh Rabbit Density  

E-Print Network (OSTI)

The Lower Keys marsh rabbit (Sylvilagus palustris hefneri, LKMR), 1 of 3 subspecies of Sylvilagus palustris, is endemic to the Lower Florida Keys. The LKMR is listed as an endangered species due to predation by feral and free roaming domestic cats (Felis catus) and raccoons (Procyon lotor), road mortality, effects of storm surges, sea level rise, the small declining metapopulation size, and possible habitat loss from hardwood encroachment. The purpose of this study was to determine the current LKMR density on lands managed by the United States Navy, Naval Air Station Key West and evaluate how vegetation structure and patch elevation effect LKMR population density. I conducted fecal pellet counts to determine LKMR density, collected vegetation data using percent composition of ground cover, Robel range pole, and point-centered quarter methods, and obtained data on patch area and elevation. I used simple linear regression to assess the relationship between LKMR density and 9 measured vegetation characteristics, patch area, and patch elevation to determine which variables have an influence on LKMR density and the relationship between them. In my examination of the simple regression models, 6 out of the 11 variables appeared to influence LKMR population density. The average per patch percent composition of nonliving material and grasses, maximum height of vegetation at the range pole, distance to nearest woody vegetation, patch elevation, and visual obstruction readings (VOR) individually accounted for 26.4%, 30.4% , 18.1%, 8.5%, 6.8%, and 1.4% of the variability in LKMR density, respectively. According to the regression models, LKMR density increased in patches with greater amounts of grasses and with greater distance to woody vegetation. Habitat management is vital to the recovery of the LKMR and needs to focus on providing greater amounts of grasses and reducing the amount of woody vegetation encroachment to enhance LKMR population density.

Dedrickson, Angela

2011-12-01T23:59:59.000Z

469

Density of Spray-Formed Materials  

SciTech Connect

Spray Forming is an advanced materials processing technology that transforms molten metal into a near-net-shape solid by depositing atomized droplets onto a substrate. Depending on the application, the spray-formed material may be used in the as-deposited condition or it may undergo post-deposition processing. Regardless, the density of the as-deposited material is an important issue. Porosity is detrimental because it can significantly reduce strength, toughness, hardness and other properties. While it is not feasible to achieve fully-dense material in the as-deposited state, density greater than 99% of theoretical density is possible if the atomization and impact conditions are optimized. Thermal conditions at the deposit surface and droplet impact angle are key processing parameters that influence the density of the material. This paper examines the factors that contribute to porosity formation during spray forming and illustrates that very high as-deposited density is achieved by optimizing processing parameters.

Kevin M. McHugh; Volker Uhlenwinkel; Nils Ellendr

2008-06-01T23:59:59.000Z

470

Lab Breakthrough: Desiccant Enhanced Evaporative Air Conditioning |  

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

Desiccant Enhanced Evaporative Air Conditioning Desiccant Enhanced Evaporative Air Conditioning Lab Breakthrough: Desiccant Enhanced Evaporative Air Conditioning May 29, 2012 - 5:22pm Addthis This breakthrough combines desiccant materials, which remove moisture from the air using heat, and advanced evaporative technologies to develop a cooling unit that uses 90 percent less electricity and up to 80 percent less total energy than traditional air conditioning. This solution, called the desiccant enhanced evaporative air conditioner (DEVAP), also controls humidity more effectively to improve the comfort of people in buildings. View the entire Lab Breakthrough playlist. What are the key facts? Recent materials advances and liquid desiccant advances to design the compact and cost-effective DEVAP system. DEVAP uses 90 percent less electricity and up to 80 percent less

471

Lab Breakthrough: Desiccant Enhanced Evaporative Air Conditioning |  

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

Lab Breakthrough: Desiccant Enhanced Evaporative Air Conditioning Lab Breakthrough: Desiccant Enhanced Evaporative Air Conditioning Lab Breakthrough: Desiccant Enhanced Evaporative Air Conditioning May 29, 2012 - 5:22pm Addthis This breakthrough combines desiccant materials, which remove moisture from the air using heat, and advanced evaporative technologies to develop a cooling unit that uses 90 percent less electricity and up to 80 percent less total energy than traditional air conditioning. This solution, called the desiccant enhanced evaporative air conditioner (DEVAP), also controls humidity more effectively to improve the comfort of people in buildings. View the entire Lab Breakthrough playlist. What are the key facts? Recent materials advances and liquid desiccant advances to design the compact and cost-effective DEVAP system.

472

General Air Permits (Louisiana) | Department of Energy  

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

General Air Permits (Louisiana) General Air Permits (Louisiana) General Air Permits (Louisiana) < Back Eligibility Agricultural Construction Industrial Investor-Owned Utility Municipal/Public Utility Rural Electric Cooperative Utility Program Info State Louisiana Program Type Environmental Regulations Provider Louisiana Department of Environmental Quality Any source, including a temporary source, which emits or has the potential to emit any air contaminant requires an air permit. Facilities with potential emissions less than 5 tons per year of any regulated air pollutant do not need a permit. The Louisiana Department of Environmental Quality issues Title V General Permits. The permit is developed based on equipment types versus facility types, the general permits are not limited in their use to a specific industry or category. Title V permits combine

473

University of Colorado Indoor Air Quality Report  

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

Image Courtesy of Ohio Image Courtesy of Ohio State University INDOOR AIR QUALITY Design Goals Design Goals Design Goals Design Goals Integrate technologically and economically innovative, low-energy strategies Minimize occupant distraction User-friendly controls Minimize pollutant sources Bio Bio Bio Bio- - - -S S S S ( ( ( (h h h h) ) ) ) ip ip ip ip indoor air quality features indoor air quality features indoor air quality features indoor air quality features Mechanical Systems Energy Recovery Ventilator Exhaust Fans Heating And Cooling Systems Passive Ventilation Low VOC materials Each of these features is described in more detail below. Mechanical Systems Energy Recovery Ventilator Knowing that our home has a tight envelope, due to our Bio-SIP construction, we needed to use mechanical ventilation to ensure suitable indoor air

474

NETL: IEP - Air Quality Research: Regulatory Drivers  

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

Regulatory Drivers Regulatory Drivers DOE/NETL’s Air Quality Research Program is in direct response to the need to ensure that fossil-fuel-fired power systems continue to meet current and future environmental requirements. Specific environmental regulatory requirements driving this research are briefly summarized below: I. Clean Air Act (Including 1990 Amendments) Title I - Air Pollution Prevention and Control Part A - Air Quality and Emission Limitations Sect. 109 - National Ambient Air Quality Standards In July 1997 EPA promulgated new standards for particulate matter finer than 2.5 micrometers (PM2.5) and revised the ambient ozone standards. Sect. 111 - Standards of Performance for New Stationary Sources Part C - Prevention of Significant Deterioration of Air Quality

475

Stirling Air Conditioner for Compact Cooling  

Science Conference Proceedings (OSTI)

BEETIT Project: Infinia is developing a compact air conditioner that uses an unconventional high efficient Stirling cycle system (vs. conventional vapor compression systems) to produce cool air that is energy efficient and does not rely on polluting refrigerants. The Stirling cycle system is a type of air conditioning system that uses a motor with a piston to remove heat to the outside atmosphere using a gas refrigerant. To date, Stirling systems have been expensive and have not had the right kind of heat exchanger to help cool air efficiently. Infinia is using chip cooling technology from the computer industry to make improvements to the heat exchanger and improve system performance. Infinias air conditioner uses helium gas as refrigerant, an environmentally benign gas that does not react with other chemicals and does not burn. Infinias improvements to the Stirling cycle system will enable the cost-effective mass production of high-efficiency air conditioners that use no polluting refrigerants.

None

2010-09-01T23:59:59.000Z

476

Underbalanced drilling with air offers many pluses  

Science Conference Proceedings (OSTI)

A pressure overbalance during conventional drilling can cause significant fluid filtrate invasion and lost circulation. Fluid invasion into the formation can lead to formation damage, high mud costs, a need for expensive completions, and well productivity impairment. Because underbalanced drilling creates a natural tendency for fluid and gas to flow from the formation to the borehole, successful underbalanced drilling depends upon the appropriate selection of circulating fluid. The use of a compressible fluid in the circulating system, referred to as air drilling, lowers the downhole pressure, allowing drilling into and beyond these sensitive formations. The paper discusses the equipment needed; well control; downhole air requirements; air drilling techniques using dry air, air-mist, stable foam, stiff foam, and aerated-fluid; downhole fires; directional air drilling; and well completions.

Shale, L. [Baker Hughes Inteq, Houston, TX (United States)

1995-06-26T23:59:59.000Z

477

Room air monitor for radioactive aerosols  

DOE Patents (OSTI)

A housing assembly for use with a room air monitor for simultaneous collection and counting of suspended particles includes a casing containing a combination detector-preamplifier system at one end, a filter system at the other end, and an air flow system consisting of an air inlet formed in the casing between the detector-preamplifier system and the filter system and an air passageway extending from the air inlet through the casing and out the end opposite the detector-preamplifier combination. The filter system collects suspended particles transported directly through the housing by means of the air flow system, and these particles are detected and examined for radioactivity by the detector-pre The U.S. Government has rights in this invention pursuant to Contract No. DE-AC04-76DP03533 between the Department of Energy and Rockwell International Corporation.

Balmer, David K. (Broomfield, CO); Tyree, William H. (Boulder, CO)

1989-04-11T23:59:59.000Z

478

Room air monitor for radioactive aerosols  

DOE Patents (OSTI)

A housing assembly for use with a room air monitor for simultaneous collection and counting of suspended particles includes a casing containing a combination detector-preamplifier system at one end, a filter system at the other end, and an air flow system consisting of an air inlet formed in the casing between the detector-preamplifier system and the filter system and an air passageway extending from the air inlet through the casing and out the end opposite the detector-preamplifier combination. The filter system collects suspended particles transported directly through the housing by means of the air flow system, and these particles are detected and examined for radioactivity by the detector-preamplifier combination. 2 figs.

Balmer, D.K.; Tyree, W.H.

1987-03-23T23:59:59.000Z

479

Heating, Ventilation and Air Conditioning Efficiency  

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

Presented By: WALTER E. JOHNSTON, PE Presented By: WALTER E. JOHNSTON, PE CEM, CEA, CLEP, CDSM, CPE Air Conditioning (HVAC) system is to provide and maintain a comfortable environment within a building for the occupants or for the process being conducted Many HVAC systems were not designed with energy efficiency as one of the design factors 3 Air Air is the major conductor of heat. Lack of heat = air conditioning OR 4 Btu - Amount of heat required to raise one pound of water 1 F = 0.252 KgCal 1 Pound of Water = About 1 Pint of Water ~ 1 Large Glass 1 Kitchen Match Basics of Air Conditioning = 1 Btu 5 = 6 Low Cost Cooling Unit 7 8 Typical Design Conditions 75 degrees F temperature 50% relative humidity 30 - 50 FPM air movement

480

Effect of Intake Air Filter Condition on Vehicle Fuel Economy  

DOE Green Energy (OSTI)

The U.S. Department of Energy (DOE) Office of Energy Efficiency and Renewable Energy and the U.S. Environmental Protection Agency (EPA) jointly maintain a fuel economy website (www.fueleconomy.gov), which helps fulfill their responsibility under the Energy Policy Act of 1992 to provide accurate fuel economy information [in miles per gallon (mpg)] to consumers. The site provides information on EPA fuel economy ratings for passenger cars and light trucks from 1985 to the present and other relevant information related to energy use such as alternative fuels and driving and vehicle maintenance tips. In recent years, fluctuations in the price of crude oil and corresponding fluctuations in the price of gasoline and diesel fuels have renewed interest in vehicle fuel economy in the United States. (User sessions on the fuel economy website exceeded 20 million in 2008 compared to less than 5 million in 2004 and less than 1 million in 2001.) As a result of this renewed interest and the age of some of the references cited in the tips section of the website, DOE authorized the Oak Ridge National Laboratory (ORNL) Fuels, Engines, and Emissions Research Center (FEERC) to initiate studies to validate and improve these tips. This report documents a study aimed specifically at the effect of engine air filter condition on fuel economy. The goal of this study was to explore the effects of a clogged air filter on the fuel economy of vehicles operating over prescribed test cycles. Three newer vehicles (a 2007 Buick Lucerne, a 2006 Dodge Charger, and a 2003 Toyota Camry) and an older carbureted vehicle were tested. Results show that clogging the air filter has no significant effect on the fuel economy of the newer vehicles (all fuel injected with closed-loop control and one equipped with MDS). The engine control systems were able to maintain the desired AFR regardless of intake restrictions, and therefore fuel consumption was not increased. The carbureted engine did show a decrease in fuel economy with increasing restriction. However, the level of restriction required to cause a substantial (10-15%) decrease in fuel economy (such as that cited in the literature) was so severe that the vehicle was almost undrivable. Acceleration performance on all vehicles was improved with a clean air filter. Once it was determined how severe the restriction had to be to affect the carbureted vehicle fuel economy, the 2007 Buick Lucerne was retested in a similar manner. We were not able to achieve the level of restriction that was achieved with the 1972 Pontiac with the Lucerne. The Lucerne's air filter box would not hold the filter in place under such severe conditions. (It is believed that this testing exceeded the design limits of the air box.) Tests were conducted at a lower restriction level (although still considerably more severe than the initial clogged filter testing), allowing the air filter to stay seated in the air box, and no significant change was observed in the Lucerne's fuel economy or the AFR over the HFET cycle. Closed-loop control in modern fuel injected vehicle applications is sophisticated enough to keep a clogged air filter from affecting the vehicle fuel economy. However for older, open-loop, carbureted vehicles, a clogged air filter can affect the fuel economy. For the vehicle tested, the fuel economy with a new air filter improved as much as 14% over that with a severely clogged filter (in which the filter was so clogged that drivability was impacted). Under a more typical state of clog, the improvement with a new filter ranged from 2 to 6%.

Norman, Kevin M [ORNL; Huff, Shean P [ORNL; West, Brian H [ORNL

2009-02-01T23:59:59.000Z

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