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1

Global Changes of the Water Cycle Intensity  

Science Conference Proceedings (OSTI)

In this study, numerical simulations of the twentieth-century climate are evaluated, focusing on the changes in the intensity of the global water cycle. A new model diagnostic of atmospheric water vapor cycling rate is developed and employed that ...

Michael G. Bosilovich; Siegfried D. Schubert; Gregory K. Walker

2005-05-01T23:59:59.000Z

2

NPP and the Global Carbon Cycle  

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

the Global Carbon Cycle the Global Carbon Cycle Introduction Photosynthetic carbon fixation comprises a major component of the global carbon cycle. Data on net primary productivity (NPP) may be sparse, but a consistent NPP data set may be used to calibrate, parameterize and evaluate models of terrestrial carbon cycling, as well as for validation of remote sensing data and other applications (identifying trends, investigating biogeochemical processes, etc.). It is also useful to place such data within the context of carbon cycling and carbon storage worldwide. For example: How much carbon exists in the biosphere, and where exactly is it stored? How much is in fossil fuels (coal, oil, gas), and how large are current fossil-fuel emissions? How much is in living biomass (plants/ animals/ humans)?

3

WATCH: Current Knowledge of the Terrestrial Global Water Cycle  

Science Conference Proceedings (OSTI)

Water-related impacts are among the most important consequences of increasing greenhouse gas concentrations. Changes in the global water cycle will also impact the carbon and nutrient cycles and vegetation patterns. There is already some evidence ...

Richard Harding; Martin Best; Eleanor Blyth; Stefan Hagemann; Pavel Kabat; Lena M. Tallaksen; Tanya Warnaars; David Wiberg; Graham P. Weedon; Henny van Lanen; Fulco Ludwig; Ingjerd Haddeland

2011-12-01T23:59:59.000Z

4

Global Primary Aluminium Industry 2010 Life Cycle Inventory  

Science Conference Proceedings (OSTI)

Within this framework, the Primary Aluminium Industry has established a global Life Cycle Inventory (LCI) data set. Inventory flows include inputs of raw materials  ...

5

Global hydrological cycle response to rapid and slow global warming  

Science Conference Proceedings (OSTI)

We analyze the response of global water vapor to global warming in a series of fully coupled climate model simulations. We find that a roughly 7% per Kelvin rate of increase of water vapor with global surface temperature is robust only for rapid ...

Larissa Back; Karen Russ; Zhengyu Liu; Kuniaki Inoue; Jiaxu Zhang; Bette Otto-Bliesner

6

Assessing a Satellite-Era Perspective of the Global Water Cycle  

Science Conference Proceedings (OSTI)

The capability of a global data compilation, largely satellite based, is assessed to depict the global atmospheric water cycle’s mean state and variability. Monthly global precipitation estimates from the Global Precipitation Climatology Project (...

C. Adam Schlosser; Paul R. Houser

2007-04-01T23:59:59.000Z

7

DOE Accord Seeks Accelerated Development of Alaska's Vast Unconventional  

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

Accord Seeks Accelerated Development of Alaska's Vast Accord Seeks Accelerated Development of Alaska's Vast Unconventional Energy Resources DOE Accord Seeks Accelerated Development of Alaska's Vast Unconventional Energy Resources April 16, 2013 - 9:30am Addthis Acting ASFE, Christopher Smith, and Alaska Department of Natural Resources Commissioner, Dan Sullivan, sign an MOU at the LNG 17 Global Conference in Houston, Texas, pledging to work together in the effort to get more of Alaska's fossil fuels into the energy stream. Photo courtesy of LNG 17. Acting ASFE, Christopher Smith, and Alaska Department of Natural Resources Commissioner, Dan Sullivan, sign an MOU at the LNG 17 Global Conference in Houston, Texas, pledging to work together in the effort to get more of Alaska's fossil fuels into the energy stream. Photo courtesy of LNG 17.

8

DOE Accord Seeks Accelerated Development of Alaska's Vast Unconventional  

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

DOE Accord Seeks Accelerated Development of Alaska's Vast DOE Accord Seeks Accelerated Development of Alaska's Vast Unconventional Energy Resources DOE Accord Seeks Accelerated Development of Alaska's Vast Unconventional Energy Resources April 16, 2013 - 9:30am Addthis Acting ASFE, Christopher Smith, and Alaska Department of Natural Resources Commissioner, Dan Sullivan, sign an MOU at the LNG 17 Global Conference in Houston, Texas, pledging to work together in the effort to get more of Alaska's fossil fuels into the energy stream. Photo courtesy of LNG 17. Acting ASFE, Christopher Smith, and Alaska Department of Natural Resources Commissioner, Dan Sullivan, sign an MOU at the LNG 17 Global Conference in Houston, Texas, pledging to work together in the effort to get more of Alaska's fossil fuels into the energy stream. Photo courtesy of LNG 17.

9

VAST 2009 Challenge: An Insider Threat  

Science Conference Proceedings (OSTI)

The 4th year of the VAST Challenge offered participating teams the opportunity to analyze three mini challenges and to combine the data and analyses and enter the Grand challenge. In this paper we provide a description of the data collections used, the overall scenario and the specific questions asked in the mini challenges. We also discuss the infrastructure developed to evaluate accuracy measures in this year’s social network mini challenge. We provide a few examples of visualizations that merited awards. As in previous year, The VAST 2009 Challenge was held in conjunction with the 2009 IEEE VAST Symposium.

Grinstein, Georges; Scholtz, Jean; Whiting, Mark A.; Plaisant, Catherine

2009-10-01T23:59:59.000Z

10

Impact of Geoengineering Schemes on the Global Hydrological Cycle  

SciTech Connect

The rapidly rising CO{sub 2} level in the atmosphere has led to proposals of climate stabilization via 'Geoengineering' schemes that would mitigate climate change by intentionally reducing the solar radiation incident on earth's surface. In this paper, we address the impact of these climate stabilization schemes on the global hydrological cycle, using equilibrium simulations from an atmospheric general circulation model coupled to a slab ocean model. We show that insolation reductions sufficient to offset global-scale temperature increases lead to a decrease in the intensity of the global hydrologic cycle. This occurs because solar forcing is more effective in driving changes in global mean evaporation than is CO{sub 2} forcing of a similar magnitude. In the model used here, the hydrologic sensitivity, defined as the percentage change in global mean precipitation per degree warming, is 2.4% for solar forcing, but only 1.5% for CO{sub 2} forcing. Although other models and the climate system itself may differ quantitatively from this result, the conclusion can be understood based on simple considerations of the surface energy budget and thus is likely to be robust. Compared to changing temperature by altering greenhouse gas concentrations, changing temperature by varying insolation results in larger changes in net radiative fluxes at the surface; these are compensated by larger changes in latent and sensible heat fluxes. Hence the hydrological cycle is more sensitive to temperature adjustment via changes in insolation than changes in greenhouse gases. This implies that an alteration in solar forcing might offset temperature changes or hydrological changes from greenhouse warming, but could not cancel both at once.

Bala, G; Duffy, P; Taylor, K

2007-12-07T23:59:59.000Z

11

The oceanic cycle and global atmospheric budget of carbonyl sulfide  

SciTech Connect

A significant portion of stratospheric air chemistry is influenced by the existence of carbonyl sulfide (COS). This ubiquitous sulfur gas represents a major source of sulfur to the stratosphere where it is converted to sulfuric acid aerosol particles. Stratospheric aerosols are climatically important because they scatter incoming solar radiation back to space and are able to increase the catalytic destruction of ozone through gas phase reactions on particle surfaces. COS is primarily formed at the surface of the earth, in both marine and terrestrial environments, and is strongly linked to natural biological processes. However, many gaps in the understanding of the global COS cycle still exist, which has led to a global atmospheric budget that is out of balance by a factor of two or more, and a lack of understanding of how human activity has affected the cycling of this gas. The goal of this study was to focus on COS in the marine environment by investigating production/destruction mechanisms and recalculating the ocean-atmosphere flux.

Weiss, P.S.

1994-12-31T23:59:59.000Z

12

Long-term global nuclear energy and fuel cycle strategies  

SciTech Connect

The Global Nuclear Vision Project is examining, using scenario building techniques, a range of long-term nuclear energy futures. The exploration and assessment of optimal nuclear fuel-cycle and material strategies is an essential element of the study. To this end, an established global E{sup 3} (energy/economics/environmental) model has been adopted and modified with a simplified, but comprehensive and multi-regional, nuclear energy module. Consistent nuclear energy scenarios are constructed using this multi-regional E{sup 3} model, wherein future demands for nuclear power are projected in price competition with other energy sources under a wide range of long-term demographic (population, workforce size and productivity), economic (price-, population-, and income-determined demand for energy services, price- and population-modified GNP, resource depletion, world-market fossil energy prices), policy (taxes, tariffs, sanctions), and top-level technological (energy intensity and end-use efficiency improvements) drivers. Using the framework provided by the global E{sup 3} model, the impacts of both external and internal drivers are investigated. The ability to connect external and internal drivers through this modeling framework allows the study of impacts and tradeoffs between fossil- versus nuclear-fuel burning, that includes interactions between cost, environmental, proliferation, resource, and policy issues.

Krakowski, R.A. [Los Alamos National Lab., NM (United States). Technology and Safety Assessment Div.

1997-09-24T23:59:59.000Z

13

VAST 2010 Challenge: Arms Dealings and Pandemics  

Science Conference Proceedings (OSTI)

The 5th VAST Challenge consisted of three mini-challenges that involved both intelligence analysis and bioinformatics. Teams could solve one, two or all three mini-challenges and assess the overall situation to enter the Grand Challenge. Mini-challenge one involved text reports about people and events giving information about arms dealers, situations in various countries and linkages between different countries. Mini-challenge two involved hospital admission and death records from various countries providing information about the spread of a world wide pandemic. Mini-challenge three involved genetic data to be used to identify the origin of the pandemic and the most dangerous viral mutations. The Grand Challenge was to determine how these various mini-challenges were connected. As always the goal was to analyze the data and provide novel interactive visualizations useful in the analytic process. We received 58 submissions in total and gave 15 awards.

Grinstein, Georges; Konecni, Shawn; Plaisant, Catherine; Scholtz, Jean; Whiting, Mark A.

2010-10-23T23:59:59.000Z

14

Multicentury Changes to the Global Climate and Carbon Cycle: Results from a Coupled Climate and Carbon Cycle Model  

Science Conference Proceedings (OSTI)

A coupled climate and carbon (CO2) cycle model is used to investigate the global climate and carbon cycle changes out to the year 2300 that would occur if CO2 emissions from all the currently estimated fossil fuel resources were released to the ...

G. Bala; K. Caldeira; A. Mirin; M. Wickett; C. Delire

2005-11-01T23:59:59.000Z

15

The Global Hydrological Cycle and Atmospheric Shortwave Absorption in Climate Models under CO2 Forcing  

Science Conference Proceedings (OSTI)

The spread among the predictions by climate models for the strengthening of the global hydrological cycle [i.e., the global mean surface latent heat flux (LH), or, equivalently, precipitation] at a given level of CO2-induced global warming is of ...

Ken Takahashi

2009-11-01T23:59:59.000Z

16

Microsoft PowerPoint - 6_Rowe-Future Challenges for Global Fuel Cycle Material Accounting Final_Updated.pptx  

National Nuclear Security Administration (NNSA)

Future Challenges Future Challenges for Global Fuel Cycle Material Accounting Nathan Rowe Chris Pickett Oak Ridge National Laboratory Nuclear Materials Management & Safeguards System Users Annual Training Meeting May 20-23, 2013 St. Louis, Missouri 2 Future Challenges for Global Fuel Cycle Material Accounting Introduction * Changing Nuclear Fuel Cycle Activities * Nuclear Security Challenges * How to Respond? - Additional Protocol - State-Level Concept - Continuity of Knowledge * Conclusion 3 Future Challenges for Global Fuel Cycle Material Accounting Nuclear Fuel Cycle Source: International Atomic Energy Agency (IAEA), Nuclear Fuel Cycle Information System (NFCIS) web site IAEA Safeguards Begins Here 4 Future Challenges for Global Fuel Cycle Material Accounting Nuclear Weapons Cycle Conversion

17

Transferability Intercomparison: An Opportunity for New Insight on the Global Water Cycle and Energy Budget  

Science Conference Proceedings (OSTI)

A new approach, called transferability intercomparisons, is described for advancing both understanding and modeling of the global water cycle and energy budget. Under this approach, individual regional climate models perform simulations with all ...

E. S. Takle; W. J. Gutowski Jr.; R. W. Arritt; J. Roads; I. Meinke; B. Rockel; C. G. Jones; A. Zadra

2007-03-01T23:59:59.000Z

18

Monthly Mean Diurnal Cycles in Surface Temperatures over Land for Global Climate Studies  

Science Conference Proceedings (OSTI)

Monthly mean diurnal cycles (MDCs) of surface temperatures over land, represented in 3-h universal time intervals, have been analyzed. Satellite near-global data from the International Satellite Cloud Climatology Project (ISCCP) with a (280 km)2 ...

Alexander Ignatov; Garik Gutman

1999-07-01T23:59:59.000Z

19

Global p-mode oscillations throughout the complete solar cycle 23 and the beginning of cycle 24  

E-Print Network (OSTI)

The parameters of the p-mode oscillations vary with solar activity. Such temporal variations provide insights for the study of the structural and dynamical changes occurring in the Sun's interior throughout the solar cycle. We present here a complete picture of the temporal variations of the global p-mode parameters (excitation, damping, frequency, peak asymmetry, and rotational splitting) over the entire solar cycle 23 and the beginning of cycle 24 as observed by the space-based, Sun-as-a-star helioseismic GOLF and VIRGO instruments onboard SoHO.

Salabert, David; Palle, Pere L; Jimenez, Antonio

2010-01-01T23:59:59.000Z

20

Estimates of the Global Water Budget and Its Annual Cycle Using Observational and Model Data  

Science Conference Proceedings (OSTI)

A brief review is given of research in the Climate Analysis Section at NCAR on the water cycle. Results are used to provide a new estimate of the global hydrological cycle for long-term annual means that includes estimates of the main reservoirs ...

Kevin E. Trenberth; Lesley Smith; Taotao Qian; Aiguo Dai; John Fasullo

2007-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "vast global cycle" 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

22nd Conference on Hydrology A Satellite View of Global Water and Energy Cycling  

E-Print Network (OSTI)

Water and Energy Cycling (2008 - 88Annual_22hydro) 2/6/2008http://ams.confex.com/ams/88Annual22nd Conference on Hydrology 8.1 A Satellite View of Global Water and Energy Cycling Paul R. Houser in modeling capability, satellite observations have great potential to make huge advances in water and energy

Houser, Paul R.

22

Regional carbon dynamics in monsoon Asia and its implications for the global carbon cycle  

E-Print Network (OSTI)

Regional carbon dynamics in monsoon Asia and its implications for the global carbon cycle Hanqin on the exchange of CO2 between the atmosphere and monsoon Asian ecosystems. During 1860­1990, modeled results suggest that monsoon Asia as a whole released 29.0 Pg C, which represents 50% of the global carbon release

23

DOE Accord Seeks Accelerated Development of Alaska's Vast Unconvention...  

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

Energy Resources Washington, D.C. -Development of potentially vast and important unconventional energy resources in Alaska - including viscous oil and methane hydrates -...

24

and Implications for the Global Carbon Cycle Executive Summary  

E-Print Network (OSTI)

North America is currently a net source of carbon dioxide to the atmosphere, contributing to the global buildup of greenhouse gases in the atmosphere and associated changes in the earth’s climate. In 2003, North America emitted nearly two billion metric tons of carbon to the atmosphere as carbon dioxide. North America’s fossil fuel emissions in 2003 (1856 million metric tons of carbon ±10 % with 95 % certainty) were 27 % of global emissions. Approximately 85 % of those emissions were from the United States, 9 % from Canada and 6 % from Mexico. The conversion of fossil fuels to energy (primarily electricity) is the single largest contributor, accounting for approximately 42 % of North American fossil emissions in 2003. Transportation is the second largest, accounting for 31 % of total emissions. There are also globally important carbon sinks in North America. In 2003, growing vegetation in North America removed approximately 530 million tons of carbon per year ( ± 50%) from the atmosphere and stored it as plant material and soil organic matter. This land sink is equivalent to approximately 30 % of the fossil fuel emissions from North America. The imbalance between the fossil fuel source and the sink on land is a net release to the atmosphere of 1335 million metric tons of carbon per year ( ± 25%). Approximately 50 % of North America’s terrestrial sink is due to the regrowth of forests in the United

Lisa Dilling (co-lead; David M. Fairman; Richard A. Houghton; Gregg H. Marl; Adam Z. Rose; Thomas J. Wilbanks

2007-01-01T23:59:59.000Z

25

Integrating Natural Gas Hydrates in the Global Carbon Cycle  

Science Conference Proceedings (OSTI)

We produced a two-dimensional geological time- and basin-scale model of the sedimentary margin in passive and active settings, for the simulation of the deep sedimentary methane cycle including hydrate formation. Simulation of geochemical data required development of parameterizations for bubble transport in the sediment column, and for the impact of the heterogeneity in the sediment pore fluid flow field, which represent new directions in modeling methane hydrates. The model is somewhat less sensitive to changes in ocean temperature than our previous 1-D model, due to the different methane transport mechanisms in the two codes (pore fluid flow vs. bubble migration). The model is very sensitive to reasonable changes in organic carbon deposition through geologic time, and to details of how the bubbles migrate, in particular how efficiently they are trapped as they rise through undersaturated or oxidizing chemical conditions and the hydrate stability zone. The active margin configuration reproduces the elevated hydrate saturations observed in accretionary wedges such as the Cascadia Margin, but predicts a decrease in the methane inventory per meter of coastline relative to a comparable passive margin case, and a decrease in the hydrate inventory with an increase in the plate subduction rate.

David Archer; Bruce Buffett

2011-12-31T23:59:59.000Z

26

The CharXive Challenge. Regulation of global carbon cycles by vegetation fires  

E-Print Network (OSTI)

It is an open, but not unanswerable, question as to how much atmospheric CO2 is sequestered globally by vegetation fires. In this work I conceptualise the question in terms of the general CharXive Challenge, discuss a mechanism by which thermoconversion of biomass may regulate the global distribution of carbon between reservoirs, show how suppression of vegetation fires by human activities may increase the fraction of carbon in the atmospheric pool, and pose three specific CharXive Challenges of crucial strategic significance to our management of global carbon cycles.

Ball, R

2010-01-01T23:59:59.000Z

27

A Strategic Metal for Green Technology: The Geologic Occurrence and Global Life Cycle of Lithium  

E-Print Network (OSTI)

A Strategic Metal for Green Technology: The Geologic Occurrence and Global Life Cycle of Lithium. Mainly due to the growing demand for lightweight and powerful batteries, lithium has become such a metal. While supplies of lithium have historically been mined from pegmatites, brine extraction from salars

28

Sensitivity of the Global Water Cycle to the Water-Holding Capacity of Land  

Science Conference Proceedings (OSTI)

The sensitivity of the global water cycle to the water-holding capacity of the plant-root zone of continental soils is estimated by simulations using a mathematical model of the general circulation of the atmosphere, with prescribed ocean surface ...

P. C. D. Milly; K. A. Dunne

1994-04-01T23:59:59.000Z

29

Solar Cycles in 150 Years of Global Sea Surface Temperature Data  

Science Conference Proceedings (OSTI)

The purpose of the present work is to demonstrate that a solar cycle response exists in surface temperature using the longest global dataset available, which is in the form of 1854–2007 sea surface temperature (SST), with an emphasis on methods ...

Jiansong Zhou; Ka-Kit Tung

2010-06-01T23:59:59.000Z

30

Energy Department Expands Research into Methane Hydrates, a Vast, Untapped  

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

Expands Research into Methane Hydrates, a Vast, Expands Research into Methane Hydrates, a Vast, Untapped Potential Energy Resource of the U.S. Energy Department Expands Research into Methane Hydrates, a Vast, Untapped Potential Energy Resource of the U.S. November 20, 2013 - 12:08pm Addthis NEWS MEDIA CONTACT (202) 586-4940 WASHINGTON - Today, U.S. Energy Secretary Ernest Moniz announced nearly $5 million in funding across seven research projects nationwide designed to increase our understanding of methane hydrates - a large, completely untapped natural gas resource-and what it could mean for the environment, as well as American economic competiveness and energy security. "The recent boom in natural gas production - in part due to long-term Energy Department investments beginning in the 70's and 80's - has had

31

Naam: dhr. prof. dr. A. Meijerink Leeropdracht Vaste Stof Chemie  

E-Print Network (OSTI)

Naam: dhr. prof. dr. A. Meijerink Profiel Leeropdracht Vaste Stof Chemie Faculteit voor Chemie en Technologie Publicaties `Visible quantum cutting in LiGdF4:Eu3+ through downconversion. Wuister, A. van Houselt, C. D. M. Donega, D. Vanmaekelbergh and A. Meijerink, Angewandte Chemie

Utrecht, Universiteit

32

On the relationship between uncertainties in tropical divergence and the hydrological cycle in global models  

Science Conference Proceedings (OSTI)

A survey of tropical divergence from three GCMs, three global reanalyses and four insitu soundings from field campaigns shows the existence of large uncertainties in the ubiquity of shallow divergent circulation as well as the depth and strength of the deep divergent circulation. More specifically, only two GCMs out of the three GCMs and three global reanalyses show significant shallow divergent circulation, which is present in all in-situ soundings, and of the three GCMs and three global reanalyses, only two global reanalyses have deep divergence profiles that lie within the range of uncertainty of the soundings. The relationships of uncertainties in the shallow and deep divergent circulation to uncertainties in present day and projected strength of the hydrological cycle from the GCMs are assessed. In the tropics and subtropics, deep divergent circulation is the largest contributor to moisture convergence that balances the net precipitation, and inter-model differences in the present day simulations carry over onto the future projections. In comparison to the soundings and reanalyses, the GCMs are found to have deeper and stronger divergent circulation. While these two characteristics of GCM divergence affect the strength of the hydrological cycle, they tend to compensate for each other so that their combined effect is relatively modest.

Hagos, Samson M.; Leung, Lai-Yung R.

2012-01-01T23:59:59.000Z

33

Supernovae of the Same Brightness, Cut From Vastly Different Cosmic Cloth  

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

Supernovae of the Supernovae of the Same Brightness, Cut From Vastly Different Cosmic Cloth Supernovae of the Same Brightness, Cut From Vastly Different Cosmic Cloth Berkeley Lab researchers make historic observation of rare Type 1a Supernova August 23, 2012 | Tags: Astrophysics Linda Vu, lvu@lbl.gov, +1 510 495 2402 ptf11kx.png The supernova PTF 11kx can be seen as the blue dot on the galaxy. The image was taken when the supernova was near maximum brightness by the Faulkes Telescope North. The system is located approximately 600 million light years away in the constellation Lynx. Image Credit: BJ Fulton (Las Cumbres Observatory Global Telescope Network) Exploding stars called Type 1a supernova are ideal for measuring cosmic distance because they are bright enough to spot across the Universe and

34

Simulations of the global carbon cycle and anthropogenic CO{sub 2} transient. Annual report  

SciTech Connect

This research focuses on improving the understanding of the anthropogenic carbon dioxide transient using observations and models of the past and present. In addition, an attempt is made to develop an ability to predict the future of the carbon cycle in response to continued anthropogenic perturbations and climate change. Three aspects of the anthropogenic carbon budget were investigated: (1) the globally integrated budget at the present time; (2) the time history of the carbon budget; and (3) the spatial distribution of carbon fluxes. One of the major activities of this study was the participation in the model comparison study of Enting, et al. [1994] carried out in preparation for the IPCC 1994 report.

Sarmiento, J.L.

1994-07-01T23:59:59.000Z

35

Energy Department Expands Research into Methane Hydrates, a Vast, Untapped  

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

0, 2013 0, 2013 Energy Department Expands Research into Methane Hydrates, a Vast, Untapped Potential Energy Resource of the U.S. WASHINGTON - Today, U.S. Energy Secretary Ernest Moniz announced nearly $5 million in funding across seven research projects nationwide designed to increase our understanding of methane hydrates - a large, completely untapped natural gas resource-and what it could mean for the environment, as well as American economic competiveness and energy security. "The recent boom in natural gas production - in part due to long-term Energy Department investments beginning in the 70's and 80's - has had a transformative impact on our energy landscape, helping to reduce greenhouse gas emissions and support thousands of American jobs," said Secretary Moniz. "While our research into methane hydrates is still in its early stages, these investments will increase our understanding of this domestic resource and the potential to safely and sustainably unlock the natural gas held within."

36

Numerical evaluation of mechanisms driving Early Jurassic changes in global carbon cycling  

Science Conference Proceedings (OSTI)

The Early Jurassic (early Toarcian, ca. 183 Ma) carbon cycle perturbation is characterized by aabout -5 parts per thousand {delta} {sup 13}C excursion in the exogenic carbon reservoirs, a 1000 ppm rise in atmospheric CO{sub 2}, and a 6-7 degrees warming. Two proposed explanations for this presumed global carbon cycle perturbation are the liberation of massive amounts of isotopically light CH4 from (1) Gondwanan coals by heating during the intrusive eruption of the Karoo-Ferrar large igneous province (LIP) or (2) the thermal dissociation of gas hydrates. Carbon cycle modeling indicates that the release of CH4 from Gondwanan coals synchronous with the eruption of the Karoo-Ferrar LIP fails to reproduce the magnitude or timing of the CO{sub 2} and {delta} {sup 13}C excursions. However, sensitivity analyses constrained by a marine cyclostratigraphically dated {delta}{sup 13}C record indicate that both features of geologic record can be explained with the huge input of about 15,340-24,750 Gt C over about 220 k.y., a result possibly pointing to the involvement of hydrothermal vent complexes in the Karoo Basin. The simulated release of > 6000 Gt C from gas hydrates also reproduces aspects of the early Toarcian rock record, but the large mass involved raises fundamental questions about its formation, storage, and release.

Beerling, D.J.; Brentnall, S.J. [University of Sheffield, Sheffield (United Kingdom)

2007-03-15T23:59:59.000Z

37

The global geochemical cycles of iron and calcium: using novel isotope systems to understand weathering, global mass budgets, natural reaction rates, and paleoclimate  

E-Print Network (OSTI)

in the sedimentary column, and diagenetic alteration of Ca isotope signals over geologic time scales. The overallThe global geochemical cycles of iron and calcium: using novel isotope systems to understand of Doctor of Philosophy in Geology in the GRADUATE DIVISION of the UNIVERSITY OF CALIFORNIA, BERKELEY

Fantle, Matthew

38

Chemistry of organic carbon in soil with relationship to the global carbon cycle  

SciTech Connect

Various ecosystem disturbances alter the balances between production of organic matter and its decomposition and therefore change the amount of carbon in soil. The most severe perturbation is conversion of natural vegetation to cultivated crops. Conversion of natural vegetation to cultivated crops results in a lowered input of slowly decomposing material which causes a reduction in overall carbon levels. Disruption of soil matrix structure by cultivation leads to lowered physical protection of organic matter resulting in an increased net mineralization rate of soil carbon. Climate change is another perturbation that affects the amount and composition of plant production, litter inputs, and decomposition regimes but does not affect soil structure directly. Nevertheless, large changes in soil carbon storage are probable with anticipated CO2 induced climate change, particularly in northern latitudes where anticipated climate change will be greatest (MacCracken and Luther 1985) and large amounts of soil organic matter are found. It is impossible, given the current state of knowledge of soil organic matter processes and transformations to develop detailed process models of soil carbon dynamics. Largely phenomenological models appear to be developing into predictive tools for understanding the role of soil organic matter in the global carbon cycle. In particular, these models will be useful in quantifying soil carbon changes due to human land-use and to anticipated global climate and vegetation changes. 47 refs., 7 figs., 2 tabs.

Post, W.M. III

1988-01-01T23:59:59.000Z

39

Marine methane cycle simulations for the period of early global warming  

Science Conference Proceedings (OSTI)

Geochemical environments, fates, and effects are modeled for methane released into seawater by the decomposition of climate-sensitive clathrates. A contemporary global background cycle is first constructed, within the framework of the Parallel Ocean Program. Input from organics in the upper thermocline is related to oxygen levels, and microbial consumption is parameterized from available rate measurements. Seepage into bottom layers is then superimposed, representing typical seabed fluid flow. The resulting CH{sub 4} distribution is validated against surface saturation ratios, vertical sections, and slope plume studies. Injections of clathrate-derived methane are explored by distributing a small number of point sources around the Arctic continental shelf, where stocks are extensive and susceptible to instability during the first few decades of global warming. Isolated bottom cells are assigned dissolved gas fluxes from porous-media simulation. Given the present bulk removal pattern, methane does not penetrate far from emission sites. Accumulated effects, however, spread to the regional scale following the modeled current system. Both hypoxification and acidification are documented. Sensitivity studies illustrate a potential for material restrictions to broaden the perturbations, since methanotrophic consumers require nutrients and trace metals. When such factors are considered, methane buildup within the Arctic basin is enhanced. However, freshened polar surface waters act as a barrier to atmospheric transfer, diverting products into the deep return flow. Uncertainties in the logic and calculations are enumerated including those inherent in high-latitude clathrate abundance, buoyant effluent rise through the column, representation of the general circulation, and bacterial growth kinetics.

Elliott, S.; Maltrud, M.; Reagan, M.T.; Moridis, G.J.; Cameron-Smith, P.J.

2011-01-02T23:59:59.000Z

40

Atmospheric Carbon Dioxide and the Global Carbon Cycle: The Key Uncertainties  

DOE R&D Accomplishments (OSTI)

The biogeochemical cycling of carbon between its sources and sinks determines the rate of increase in atmospheric CO{sub 2} concentrations. The observed increase in atmospheric CO{sub 2} content is less than the estimated release from fossil fuel consumption and deforestation. This discrepancy can be explained by interactions between the atmosphere and other global carbon reservoirs such as the oceans, and the terrestrial biosphere including soils. Undoubtedly, the oceans have been the most important sinks for CO{sub 2} produced by man. But, the physical, chemical, and biological processes of oceans are complex and, therefore, credible estimates of CO{sub 2} uptake can probably only come from mathematical models. Unfortunately, one- and two-dimensional ocean models do not allow for enough CO{sub 2} uptake to accurately account for known releases. Thus, they produce higher concentrations of atmospheric CO{sub 2} than was historically the case. More complex three-dimensional models, while currently being developed, may make better use of existing tracer data than do one- and two-dimensional models and will also incorporate climate feedback effects to provide a more realistic view of ocean dynamics and CO{sub 2} fluxes. The instability of current models to estimate accurately oceanic uptake of CO{sub 2} creates one of the key uncertainties in predictions of atmospheric CO{sub 2} increases and climate responses over the next 100 to 200 years.

Peng, T. H.; Post, W. M.; DeAngelis, D. L.; Dale, V. H.; Farrell, M. P.

1987-12-00T23:59:59.000Z

Note: This page contains sample records for the topic "vast global cycle" 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

GLOBAL BIOGEOCHEMICAL CYCLES, VOL. 7, NO. 3, PAGES 557-597, SEPTEMBER 1993 GLOBAL ANALYSIS OF THE POTENTIAL FOR  

E-Print Network (OSTI)

for the controls are derived from global gridded (løxl ø resolution) data basesof soil type, soil texture, NDVI uncertainty regarding the distribution and magnitude of the sourcesthemselves. For sometime it was thought #12 was combustion of fossil fuels, in particular, coalburning power plantsproducing electricity [Hao et al., 1987

Fridlind, Ann

42

Experiences from Simulating the Global Carbon Cycle in a Grid Computing Environment, The Fourteenth Global Grid Forum (GGF 14),Chicago  

E-Print Network (OSTI)

Abstract. We discuss our software development experiences with Grid-BGC, a gridenabled terrestrial carbon cycle modeling environment. Grid-BGC leverages grid computing technologies to create a secure, reliable and easy to use distributed computational environment for climate modeling. The goal is to develop a system which insulates the scientists from tedious configuration details thereby increasing scientific productivity. This project is part of a collaborative effort between the

Jason Cope; Craig Hartsough; Sean Mccreary; Peter Thornton; Henry M. Tufo; Nathan Wilhelmi; Matthew Woitaszek

2005-01-01T23:59:59.000Z

43

Index Cycles in the Northern Hemisphere during the Global Weather Experiment  

Science Conference Proceedings (OSTI)

An index cycle occurring in the Northern Hemisphere during the late winter and spring of 1979 has been examined in detail using the ECMWF Level IIIb data set.

John W. Kidson

1985-04-01T23:59:59.000Z

44

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

45

Multiscale Interactions in the Life Cycle of a Tropical Cyclone Simulated in a Global Cloud-System-Resolving Model. Part II: System-Scale and Mesoscale Processes  

Science Conference Proceedings (OSTI)

The life cycle of Tropical Storm Isobel was simulated reasonably well in the Nonhydrostatic Icosahedral Atmospheric Model (NICAM), a global cloud-system-resolving model. The evolution of the large-scale circulation and the storm-scale structure ...

Hironori Fudeyasu; Yuqing Wang; Masaki Satoh; Tomoe Nasuno; Hiroaki Miura; Wataru Yanase

2010-12-01T23:59:59.000Z

46

Africa Becoming a Biofuel Battleground Western companies are pushing to acquire vast  

E-Print Network (OSTI)

Africa Becoming a Biofuel Battleground Western companies are pushing to acquire vast stretches of African land to meet the world's biofuel needs By Horand Knaup Western companies are pushing to acquire vast stretches of African land to meet the world's biofuel needs. Local farmers and governments

47

Prediction of the Life Cycle of a Supertyphoon with a High-Resolution Global Model  

Science Conference Proceedings (OSTI)

The life cycle of Supertyphoon Hope (1979) from a tropical depression stage to intensification and its eventual weakening after land-fall, some 6 days later, is followed in a real-data numerical prediction experiment. The predictions are carried ...

T. N. Krishnamurti; D. Oosterhof

1989-10-01T23:59:59.000Z

48

The Annual Cycle of the Energy Budget. Part I: Global Mean and Land–Ocean Exchanges  

Science Conference Proceedings (OSTI)

The mean and annual cycle of energy flowing into the climate system and its storage, release, and transport in the atmosphere, ocean, and land surface are estimated with recent observations. An emphasis is placed on establishing internally ...

John T. Fasullo; Kevin E. Trenberth

2008-05-01T23:59:59.000Z

49

Institutions, public policy and the product life cycle : the globalization of biomanufacturing and implications for Massachusetts  

E-Print Network (OSTI)

Globalization has brought about a major shift in our understanding of how companies organize themselves and how they compete. The fragmentation of firms in their scope and structure, the vertical disintegration of firms ...

Reynolds, Elisabeth B

2010-01-01T23:59:59.000Z

50

Life Cycle Assessment of the Energy Independence and Security Act of 2007: Ethanol - Global Warming Potential and Environmental Emissions  

DOE Green Energy (OSTI)

The objective of this study is to use life cycle assessment (LCA) to evaluate the global warming potential (GWP), water use, and net energy value (NEV) associated with the EISA-mandated 16 bgy cellulosic biofuels target, which is assumed in this study to be met by cellulosic-based ethanol, and the EISA-mandated 15 bgy conventional corn ethanol target. Specifically, this study compares, on a per-kilometer-driven basis, the GWP, water use, and NEV for the year 2022 for several biomass feedstocks.

Heath, G. A.; Hsu, D. D.; Inman, D.; Aden, A.; Mann, M. K.

2009-07-01T23:59:59.000Z

51

Natural Variability in a Stable, 1000-Yr Global Coupled Climate–Carbon Cycle Simulation  

Science Conference Proceedings (OSTI)

A new 3D global coupled carbon–climate model is presented in the framework of the Community Climate System Model (CSM-1.4). The biogeochemical module includes explicit land water–carbon coupling, dynamic carbon allocation to leaf, root, and wood, ...

Scott C. Doney; Keith Lindsay; Inez Fung; Jasmin John

2006-07-01T23:59:59.000Z

52

DOE-Funded Project Shows Promise for Tapping Vast U.S. Oil Shale Resources  

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

Funded Project Shows Promise for Tapping Vast U.S. Oil Shale Funded Project Shows Promise for Tapping Vast U.S. Oil Shale Resources DOE-Funded Project Shows Promise for Tapping Vast U.S. Oil Shale Resources March 31, 2009 - 1:00pm Addthis Washington, DC - A technology as simple as an advanced heater cable may hold the secret for tapping into the nation's largest source of oil, which is contained in vast amounts of shale in the American West. In a recently completed project sponsored by the U.S. Department of Energy (DOE) through the Office of Fossil Energy's Oil and Natural Gas Program, Composite Technology Development (CTD) Inc. successfully demonstrated the application of a ceramic-composite insulated heater cable for oil shale recovery deep underground. The Small Business Innovation Research project provided employment for 25 professionals and resulted in two patent

53

The Global Impact of the Systemic Economies and MENA Business Cycles ?  

E-Print Network (OSTI)

This paper analyzes spillovers from macroeconomic shocks in systemic economies (China, the Euro Area, and the United States) to the Middle East and North Africa (MENA) region as well as outward spillovers from a GDP shock in the Gulf Cooperation Council (GCC) countries and MENA oil exporters to the rest of the world. This analysis is based on a Global Vector Autoregression (GVAR) model, estimated for 38 countries/regions over the period 1979Q2 to 2011Q2. Spillovers are transmitted across economies via trade, financial, and commodity price linkages. The results show that the MENA countries are becoming more sensitive to developments in China than to shocks in the Euro Area or the United States, in line with the direction of evolving trade patterns and the emergence of China as a key driver of the global economy. Outward spillovers from the GCC region and MENA oil exporters are likely to be stronger in their immediate geographical proximity, but also have global implications.

Paul Cashin A; Kamiar Mohaddes B; Mehdi Raissi A

2013-01-01T23:59:59.000Z

54

Vast Energy Resource in Residual Oil Zones, FE Study Says | Department of  

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

Vast Energy Resource in Residual Oil Zones, FE Study Says Vast Energy Resource in Residual Oil Zones, FE Study Says Vast Energy Resource in Residual Oil Zones, FE Study Says July 20, 2012 - 1:00pm Addthis Washington, DC - Billions of barrels of oil that could increase domestic supply, help reduce imports, and increase U.S. energy security may be potentially recoverable from residual oil zones, according to initial findings from a study supported by the U.S. Department of Energy's Office of Fossil Energy (FE). The recently completed study, conducted by researchers at the University of Texas-Permian Basin (UTPB), is one of several FE-supported research projects providing insight that will help tap this valuable-but-overlooked resource. Residual oil zones, called ROZs, are areas of immobile oil found below the oil-water contact of a reservoir. ROZs are similar to reservoirs in the

55

Development of Low Global Warming Potential Refrigerant Solutions for Commercial Refrigeration Systems using a Life Cycle Climate Performance Design Tool  

SciTech Connect

Commercial refrigeration systems are known to be prone to high leak rates and to consume large amounts of electricity. As such, direct emissions related to refrigerant leakage and indirect emissions resulting from primary energy consumption contribute greatly to their Life Cycle Climate Performance (LCCP). In this paper, an LCCP design tool is used to evaluate the performance of a typical commercial refrigeration system with alternative refrigerants and minor system modifications to provide lower Global Warming Potential (GWP) refrigerant solutions with improved LCCP compared to baseline systems. The LCCP design tool accounts for system performance, ambient temperature, and system load; system performance is evaluated using a validated vapor compression system simulation tool while ambient temperature and system load are devised from a widely used building energy modeling tool (EnergyPlus). The LCCP design tool also accounts for the change in hourly electricity emission rate to yield an accurate prediction of indirect emissions. The analysis shows that conventional commercial refrigeration system life cycle emissions are largely due to direct emissions associated with refrigerant leaks and that system efficiency plays a smaller role in the LCCP. However, as a transition occurs to low GWP refrigerants, the indirect emissions become more relevant. Low GWP refrigerants may not be suitable for drop-in replacements in conventional commercial refrigeration systems; however some mixtures may be introduced as transitional drop-in replacements. These transitional refrigerants have a significantly lower GWP than baseline refrigerants and as such, improved LCCP. The paper concludes with a brief discussion on the tradeoffs between refrigerant GWP, efficiency and capacity.

Abdelaziz, Omar [ORNL; Fricke, Brian A [ORNL; Vineyard, Edward Allan [ORNL

2012-01-01T23:59:59.000Z

56

Simulating past and future dynamics of natural ecosystems in the United States. Global Biogeochemical Cycles 17(2)1045  

E-Print Network (OSTI)

[1] Simulations of potential vegetation distribution, natural fire frequency, carbon pools, and fluxes are presented for two DGVMs (Dynamic Global Vegetation Models) from the second phase of the Vegetation/Ecosystem Modeling and Analysis Project. Results link vegetation dynamics to biogeochemical cycling for the conterminous United States. Two climate change scenarios were used: a moderately warm scenario from the Hadley Climate Centre and a warmer scenario from the Canadian Climate Center. Both include sulfate aerosols and assume a gradual CO2 increase. Both DGVMs simulate a reduction of southwestern desert areas, a westward expansion of eastern deciduous forests, and the expansion of forests in the western part of the Pacific Northwest and in north-central California. Both DGVMs predict an increase in total biomass burnt in the next century, with a more pronounced increase under the Canadian scenario. Under the Hadley scenario, both DGVMs simulate increases in total carbon stocks. Under the Canadian scenario, both DGVMs simulate a decrease in live vegetation carbon. We identify similarities in model behavior due to the climate forcing and explain differences by the different structure of the models and their different sensitivity to

Dominique Bachelet; Ronald P. Neilson; Thomas Hickler; Raymond J. Drapek; James M. Lenihan; Martin T. Sykes; Benjamin Smith; Stephen Sitch; Kirsten Thonicke

2003-01-01T23:59:59.000Z

57

NETL: News Release - DOE-Funded Project Shows Promise for Tapping Vast U.S.  

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

March 31, 2009 March 31, 2009 DOE-Funded Project Shows Promise for Tapping Vast U.S. Oil Shale Resources Colorado Company Seeks Patents on Low-Cost, Low-Impact Heater Technology Washington, DC -A technology as simple as an advanced heater cable may hold the secret for tapping into the nation's largest source of oil, which is contained in vast amounts of shale in the American West. In a recently completed project sponsored by the U.S. Department of Energy (DOE) through the Office of Fossil Energy's Oil and Natural Gas Program, Composite Technology Development (CTD) Inc. successfully demonstrated the application of a ceramic-composite insulated heater cable for oil shale recovery deep underground. The Small Business Innovation Research project provided employment for 25 professionals and resulted in two patent applications related to the cable.

58

Global analysis of the transcriptional regulation of Sinorhizobium meliloti cell cycle progression and study of cell cycle regulation during symbiosis with Medicago sativa  

E-Print Network (OSTI)

The complex [alpha]-proteobacterial cell cycle regulatory network is essential not only for faithful replication and segregation of the genome, but also to coordinate unique cellular differentiation events that have evolved ...

De Nisco, Nicole J

2013-01-01T23:59:59.000Z

59

NETL: News Release - New Projects to Study Ways to Recover Vast Quantities  

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

March 12, 2002 March 12, 2002 New Projects to Study Ways to Recover Vast Quantities of "Left Behind" Oil TULSA, OK - Nearly two out of every three barrels of oil discovered in the United States remain trapped underground after conventional recovery operations. This staggering amount of remaining oil - approximately 200 billion barrels - can be one of America's best hopes for greater energy security if new technologies can be developed to recover it. Often, however, the "left behind" oil is in regions of the reservoir that are difficult to access and the oil is held tightly in place within tiny rock pores by capillary pressures that resist many traditional oil production practices. Now, as part of its program to develop ways to free this unrecovered oil, the Department of Energy's Fossil Energy research program is adding three new projects to be carried out by three of the Nation's top petroleum engineering universities:

60

"Airborne Wind Energy - Harnessing a Vast, Untapped Renewable Energy  

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

November 14, 2012, 4:15pm November 14, 2012, 4:15pm Colloquia MBG Auditorium "Airborne Wind Energy - Harnessing a Vast, Untapped Renewable Energy Source" Dr. Kenneth Jensen Makani Power Inc. At just 500 m above the ground, the average power density of the wind is double that at 100 m where wind turbines typically reside. This makes high-altitude wind one of the most concentrated forms of renewable energy after hydro-power. Building conventional wind turbines at this height is uneconomical, which begs the question: how do we harness this concentrated and completely untapped resource? Makani Power is developing a novel airborne wind turbine (AWT), which consists of a turbine-carrying aircraft that is tethered to the ground. Propelled by the wind, the AWT travels in a circular path (similar to the

Note: This page contains sample records for the topic "vast global cycle" 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

Multiscale Interactions in the Life Cycle of a Tropical Cyclone Simulated in a Global Cloud-System-Resolving Model. Part I: Large-Scale and Storm-Scale Evolutions  

Science Conference Proceedings (OSTI)

The Nonhydrostatic Icosahedral Atmospheric Model (NICAM), a global cloud-system-resolving model, successfully simulated the life cycle of Tropical Storm Isobel that formed over the Timor Sea in the austral summer of 2006. The multiscale ...

Hironori Fudeyasu; Yuqing Wang; Masaki Satoh; Tomoe Nasuno; Hiroaki Miura; Wataru Yanase

2010-12-01T23:59:59.000Z

62

Influence of the Realistic Description of Soil Water-Holding Capacity on the Global Water Cycle in a GCM  

Science Conference Proceedings (OSTI)

The sensitivity of the hydrological cycle to soil water-holding capacity (WHC) is investigated using the Laboratoire de Meteorologie Dynamique General Circulation Model (LMD GCM) coupled to a land surface model (LSM). A reference simulation (REF),...

Agnès Ducharne; Katia Laval

2000-12-01T23:59:59.000Z

63

Simulation of the Global Hydrological Cycle in the CCSM Community Atmosphere Model Version 3 (CAM3): Mean Features  

Science Conference Proceedings (OSTI)

The seasonal and annual climatological behavior of selected components of the hydrological cycle are presented from coupled and uncoupled configurations of the atmospheric component of the Community Climate System Model (CCSM) Community ...

James J. Hack; Julie M. Caron; Stephen G. Yeager; Keith W. Oleson; Marika M. Holland; John E. Truesdale; Philip J. Rasch

2006-06-01T23:59:59.000Z

64

EVALUATING THE LAND AND OCEAN COMPONENTS OF THE GLOBAL CARBON CYCLE IN THE CMIP5 EARTH SYSTEM MODELS  

Science Conference Proceedings (OSTI)

We assess the ability of 18 Earth System Models to simulate the land and ocean carbon cycle for the present climate. These models will be used in the next Intergovernmental Panel on Climate Change (IPCC) Fifth Assessment Report (AR5) for climate ...

A. Anav; P. Friedlingstein; M. Kidston; L. Bopp; P. Ciais; P. Cox; C. Jones; M. Jung; R. Myneni; Z. Zhu

65

Evaluating the Land and Ocean Components of the Global Carbon Cycle in the CMIP5 Earth System Models  

Science Conference Proceedings (OSTI)

The authors assess the ability of 18 Earth system models to simulate the land and ocean carbon cycle for the present climate. These models will be used in the next Intergovernmental Panel on Climate Change (IPCC) Fifth Assessment Report (AR5) for ...

A. Anav; P. Friedlingstein; M. Kidston; L. Bopp; P. Ciais; P. Cox; C. Jones; M. Jung; R. Myneni; Z. Zhu

2013-09-01T23:59:59.000Z

66

Penetration of hydrogen-based energy system and its potential for causing global environmental change: Scoping risk analysis based on life cycle thinking  

SciTech Connect

A hydrogen-based economy seems superficially to be environmentally friendly, and many people have worked toward its realization. Today hydrogen is mainly produced by decarbonizing fossil fuels (e.g. natural gas), and in the future decarbonization of both fossil fuels and biomass will play a leading role in the production of hydrogen. The main purpose of this paper is to suggest the identification of potential environmental risks in terms of 'life cycle thinking' (which considers all aspects from production to utilization) with regard to the hydrogen-based economy to come. Hydrogen production by decarbonization results in CO{sub 2} emissions. The final destination of the recovered CO{sub 2} is uncertain. Furthermore, there is a possibility that hydrogen molecules will escape to the atmosphere, posing risks that could occasion global environmental changes such as depletion of stratospheric ozone, temperature change in the stratosphere and change of the hydrides cycle through global vaporization. Based on the results of simulation, requirements regarding the following items are proposed to minimize potential risks: hydrogen source, production and storage loss.

Kikuchi, Ryunosuke [Department of Basic Science and Environment (CERNAS), ESAC, Polytechnic Institute of Coimbra, Bencanta, 3040-316 Coimbra (Portugal)]. E-mail: kikuchi@mail.esac.pt

2006-03-15T23:59:59.000Z

67

Hydrological Cycle in the Danube basin in present-day and XXII century simulations by IPCCAR4 global climate models  

E-Print Network (OSTI)

We present an intercomparison and verification analysis of 20 GCMs included in the 4th IPCC assessment report regarding their representation of the hydrological cycle on the Danube river basin for 1961-2000 and for the 2161-2200 SRESA1B scenario runs. The basin-scale properties of the hydrological cycle are computed by spatially integrating the precipitation, evaporation, and runoff fields using the Voronoi-Thiessen tessellation formalism. The span of the model simulated mean annual water balances is of the same order of magnitude of the observed Danube discharge of the Delta; the true value is within the range simulated by the models. Some land components seem to have deficiencies since there are cases of violation of water conservation when annual means are considered. The overall performance and the degree of agreement of the GCMs are comparable to those of the RCMs analyzed in a previous work, in spite of the much higher resolution and common nesting of the RCMs. The reanalyses are shown to feature severa...

Lucarini, Valerio; Kriegerova, Ida; Speranza, Antonio; 10.1029/2007JD009167

2011-01-01T23:59:59.000Z

68

VAST - a real-time pipeline for detecting radio transients and variables on the Australian SKA Pathfinder (ASKAP) telescope  

E-Print Network (OSTI)

The Australian SKA Pathfinder (ASKAP) is a next generation radio telescope currently under construction in Western Australia. The fast survey speed and wide field of view make it an ideal instrument for blind transients searches. The ASKAP Variable and Slow Transients (VAST) survey is a one of the major science programs planned for ASKAP. The scientific goals of VAST include the detection and characterisation of a wide range of transient and variable phenomena, from gamma-ray burst afterglows to extreme scattering events, on timescales of 5 seconds or longer. We describe the data and processing challenges involved in running the VAST real-time transient detection pipeline. ASKAP will produce 2.5 GB of visibility data per second, transformed into one 8GB image cube every 5 seconds. Each cube will contain approximately twenty 100 megapixel images with 100s of radio sources detected in each epoch. The VAST pipeline will measure and monitor all of these sources, detect variables and transients and generate alerts...

Banyer, Jay

2012-01-01T23:59:59.000Z

69

Cycles in fossil diversity  

E-Print Network (OSTI)

Transitions in Global Marine Diversity, Science 281, 1157-know if this cycle is a variation in true diversity or onlyin observed diversity, but either case requires explanation

Rohde, Robert A.; Muller, Richard A.

2004-01-01T23:59:59.000Z

70

Structural insight into SoxC and SoxD interaction and their role in electron transport process in the novel global sulfur cycle in Paracoccus pantotrophus  

SciTech Connect

Microbial oxidation of reduced inorganic sulfur compounds mainly sulfur anions in the environment is one of the major reactions of the global sulfur cycle mediated by phylogenetically diverse prokaryotes. The sulfur oxidizing gene cluster (sox) of {alpha}-Proteobacteria comprises of at least 16 genes, which form two transcriptional units, viz., soxSRT and soxVWXYZABCDEFGH. Sequence analysis reveals that soxD gene product (SoxD) belongs to the di-heme cytochrome c family of electron transport proteins whereas soxC gene product (SoxC) is a sulfur dehydrogenase. We employed homology modeling to construct the three-dimensional structures of the SoxC and SoxD from Paracoccus pantotrophus. SoxD protein is known to interact with SoxC. With the help of docking studies we have identified the residues involved in the interaction of SoxC and SoxD. The putative active site geometries of these two proteins as well as the structural basis of the involvements of these proteins in electron transport process during the oxidation of sulfur anions are also investigated.

Bagchi, Angshuman [Bioinformatics Center, Bose Institute, AJC Bose Centenary Building, P1/12 CIT Scheme VIIM, Kolkata 700 054 (India)]. E-mail: angshu@bic.boseinst.ernet.in; Roy, Pradosh [Department of Microbiology, Bose Institute, AJC Bose Centenary Building, P1/12 CIT Scheme VIIM, Kolkata 700 054 (India)]. E-mail: prodosh@bic.boseinst.ernet.in

2005-06-17T23:59:59.000Z

71

Carbon Cycle  

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

Carbon Cycle Carbon Cycle Latest Global Carbon Budget Estimates Including CDIAC Estimates Terrestrial Carbon Management Data Sets and Analyses Carbon Dioxide Emissions from Fossil-Fuel Consumption and Cement Manufacture, (2011) Annual Fossil-Fuel CO2 Emissions: Mass of Emissions Gridded by One Degree Latitude by One Degree Longitude (2012) Monthly Fossil-Fuel CO2 Emissions: Mass of Emissions Gridded by One Degree Latitude by One Degree Longitude (2012) Annual Fossil-Fuel CO2 Emissions: Global Stable Carbon Isotopic Signature (2012) Monthly Fossil-Fuel CO2 Emissions: Isomass (δ 13C) of Emissions Gridded by One Degree Latitude by One Degree Longitude (2012) AmeriFlux - Terrestrial Carbon Dioxide, Water Vapor, and Energy Balance Measurements Estimates of Monthly CO2 Emissions and Associated 13C/12C Values

72

Global Trends and Variability in Soil Moisture and Drought Characteristics, 1950–2000, from Observation-Driven Simulations of the Terrestrial Hydrologic Cycle  

Science Conference Proceedings (OSTI)

Global and regional trends in drought for 1950–2000 are analyzed using a soil moisture–based drought index over global terrestrial areas, excluding Greenland and Antarctica. The soil moisture fields are derived from a simulation of the ...

Justin Sheffield; Eric F. Wood

2008-02-01T23:59:59.000Z

73

Are Refiners Entering a Golden Age or a Short Cycle?  

U.S. Energy Information Administration (EIA)

Are Refiners Entering a Golden Age or a Short Cycle? Global Refining Strategies 2007 Barcelona, Spain

74

Water-Use Efficiency of the Terrestrial Biosphere: A Model Analysis Focusing on Interactions between the Global Carbon and Water Cycles  

Science Conference Proceedings (OSTI)

Carbon and water cycles are intimately coupled in terrestrial ecosystems, and water-use efficiency (WUE; carbon gain at the expense of unit water loss) is one of the key parameters of ecohydrology and ecosystem management. In this study, the ...

Akihiko Ito; Motoko Inatomi

2012-04-01T23:59:59.000Z

75

A Life-Cycle Analysis of Alternatives for the Management of Waste Hot-Mix Asphalt, Commercial Food Waste, and Construction and Demolition Waste.  

E-Print Network (OSTI)

??Effective management of commercially generated food waste presents an opportunity for avoided global warming potential, renewable energy production, and renewable agrochemical production. The vast majority… (more)

Levis, James William

2008-01-01T23:59:59.000Z

76

Estimated Global Hydrographic Variability  

Science Conference Proceedings (OSTI)

An estimate is made of the three-dimensional global oceanic temperature and salinity variability, omitting the seasonal cycle, both as a major descriptive element of the ocean circulation and for use in the error estimates of state estimation. ...

Gaël Forget; Carl Wunsch

2007-08-01T23:59:59.000Z

77

The Carbon Cycle  

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

The Carbon Cycle The Carbon Cycle The global carbon cycle involves the carbon in and exchanging between the earth's atmosphere, fossil fuels, the oceans, and the vegetation and soils of the earth's terrestrial ecosystems. image Each year, the world's terrestrial ecosystems withdraw carbon from the atmosphere through photosynthesis and add it again through respiration and decay. A more detailed look at the global carbon cycle for the 1990s is shown below. The main annual fluxes in GtC yr-1 are: pre-industrial "natural" fluxes in black and "anthropogenic" fluxes in red (modified from Sarmiento and Gruber, 2006, with changes in pool sizes from Sabine et al., 2004a). The net terrestrial loss of -39 GtC is inferred from cumulative fossil fuel emissions minus atmospheric increase minus ocean storage. The loss of

78

A Study of the Abundance and 13C/12C Ratio of Atmospheric Carbon Dioxide to Advance the Scientific Understanding of Terrestrial Processes Regulating the Global Carbon Cycle  

Science Conference Proceedings (OSTI)

The primary goal of our research program, consistent with the goals of the U.S. Climate Change Science Program and funded by the terrestrial carbon processes (TCP) program of DOE, has been to improve understanding of changes in the distribution and cycling of carbon among the active land, ocean and atmosphere reservoirs, with particular emphasis on terrestrial ecosystems. Our approach is to systematically measure atmospheric CO2 to produce time series data essential to reveal temporal and spatial patterns. Additional measurements of the 13C/12C isotopic ratio of CO2 provide a basis for distinguishing organic and inorganic processes. To pursue the significance of these patterns further, our research also involved interpretations of the observations by models, measurements of inorganic carbon in sea water, and of CO2 in air near growing land plants.

Stephen C. Piper

2005-10-15T23:59:59.000Z

79

Annual Cycle of Surface Longwave Radiation  

Science Conference Proceedings (OSTI)

The annual cycles of upward and downward longwave fluxes at the earth’s surface are investigated by use of the NASA Global Energy and Water Cycle Experiment (GEWEX) Surface Radiation Budget Dataset. Principal component analysis is used to quantify ...

Pamela E. Mlynczak; G. Louis Smith; Anne C. Wilber; Paul W. Stackhouse

2011-06-01T23:59:59.000Z

80

Le grenier grec de Samarkand La dcouverte d'un vaste entrept crales d'poque hellnistique en pleine acropole, dans  

E-Print Network (OSTI)

1 Le grenier grec de Samarkand La découverte d'un vaste entrepôt à céréales d'époque hellénistique'écoulement des eaux de surface, que l'on suit jusqu'à la porte de Bukhara (Rapin 1994, pp. 553-554), aux parois brèches qui se créaient dans les remparts du fait des bombardements. On estime que les pièces du grenier

Paris-Sud XI, Université de

Note: This page contains sample records for the topic "vast global cycle" 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

Global Security  

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

Global Security Global Security LANL's mission is to develop and apply science and technology to ensure the safety, security, and effectiveness of the U.S. nuclear deterrent;...

82

Carbon Cycle 2.0  

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

Carbon Cycle 2.0 Carbon Cycle 2.0 Pioneering science for sustainable energy solutions Artificial Photosynthesis Energy Storage Combustion Carbon Capture & Storage Developing World Efficiency Photovoltaics Biofuels Energy Analysis Climate Modeling Carbon Cycle 2.0 is... 1. A vision for * a global energy system integrated with the Earth's natural carbon cycles * an interactive Berkeley Lab environment with a shared sense of purpose 2. A program development plan that will allow us to deepen our capabilities and provide more opportunities to have impact 3. An attempt to integrate our basic research with applications using models of technology deployment constraints 4. Set of internal activities aimed at priming the effort

83

BNL | Carbon Cycle Science  

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

The Carbon Cycle Science & Technology Group aims to increase understanding The Carbon Cycle Science & Technology Group aims to increase understanding of the impacts of global change on managed and unmanaged ecosystems and improve knowledge of possible global change mitigation approaches. The group has three main focus areas. FACE Climate Change Experimental Facility Design and Management The CCS&T group is an internationally recognized leader in the development of Free Air CO2 Enrichment (FACE) research facilities. We are interested in the design and management of manipulative experiments that examine the effects of carbon dioxide, ozone, other atmospheric pollutants, temperature and precipitation on natural and managed ecosystems. FACE Plant Physiology and High Throughput Biochemical Phenotyping At FACE facilities we have studied the mechanisms that underlie the

84

Terrestrial Carbon Cycle Dynamics under Recent and Future Climate Change  

Science Conference Proceedings (OSTI)

The behavior of the terrestrial carbon cycle under historical and future climate change is examined using the University of Victoria Earth System Climate Model, now coupled to a dynamic terrestrial vegetation and global carbon cycle model. When ...

H. Damon Matthews; Andrew J. Weaver; Katrin J. Meissner

2005-05-01T23:59:59.000Z

85

Life Cycles of Moist Baroclinic Eddies  

Science Conference Proceedings (OSTI)

The interaction between moisture and baroclinic eddies was examined through eddy life-cycle experiments using a global, primitive equation model. How condensation affects the structural evolution of eddies, their fluxes of heat, moisture, and ...

William J. Gutowski Jr.; Lee E. Branscome; Douglas A. Stewart

1992-02-01T23:59:59.000Z

86

Understanding the petrochemical cycle: Part 1  

Science Conference Proceedings (OSTI)

Fitness in the hydrocarbon processing industry (HPI) arena involves understanding and coping with business cycles: supply and demand. This becomes increasingly more important as the industry globalizes and matures. Competitive-edge thinking needs to look hard at the forces that influence business cycles. Recognition of potential pitfalls is very important when considering: future capacity expansion, mergers and acquisitions, market departure, plant closure, potential product substitution, etc. Understanding pricing mechanisms and the workings of hockey-stick profitability profiles help HPI operators endure cycle downturns and prepare plants to maximize profits for the next upswing. The paper discusses characteristic trends, cycles in the hydrocarbon processing industry, current conditions, and mitigating cycle effects.

Sedriks, W. (SRI International, Menlo Park, CA (United States))

1994-03-01T23:59:59.000Z

87

Global Warming: Physics and Facts  

Science Conference Proceedings (OSTI)

This report contains papers on: A tutorial on global atmospheric energetics and the greenhouse effect; global climate models: what and how; comparison of general circulation models; climate and the earth`s radiation budget; temperature and sea level change; short-term climate variability and predictions; the great ocean conveyor; trace gases in the atmosphere: temporal and spatial trends; the geochemical carbon cycle and the uptake of fossil fuel CO{sub 2}; forestry and global warming; the physical and policy linkages; policy implications of greenhouse warming; options for lowering US carbon dioxide emissions; options for reducing carbon dioxide emissions; and science and diplomacy: a new partnership to protect the environment.

Levi, B.G. [Physics Today, New York, NY (United States); Hafemeister, D. [Committee on Foreign Relations (U.S. Senate), Washington, DC (United States); Scribner, R. [Georgetown Univ., Washington, DC (United States)] [eds.

1992-05-01T23:59:59.000Z

88

Global Warming: Physics and Facts  

Science Conference Proceedings (OSTI)

This report contains papers on: A tutorial on global atmospheric energetics and the greenhouse effect; global climate models: what and how; comparison of general circulation models; climate and the earth's radiation budget; temperature and sea level change; short-term climate variability and predictions; the great ocean conveyor; trace gases in the atmosphere: temporal and spatial trends; the geochemical carbon cycle and the uptake of fossil fuel CO{sub 2}; forestry and global warming; the physical and policy linkages; policy implications of greenhouse warming; options for lowering US carbon dioxide emissions; options for reducing carbon dioxide emissions; and science and diplomacy: a new partnership to protect the environment.

Levi, B.G. (Physics Today, New York, NY (United States)); Hafemeister, D. (Committee on Foreign Relations (U.S. Senate), Washington, DC (United States)); Scribner, R. (Georgetown Univ., Washington, DC (United States)) (eds.)

1992-01-01T23:59:59.000Z

89

Diabatic Heating Profiles in Recent Global Reanalyses  

Science Conference Proceedings (OSTI)

Diabatic heating profiles are extremely important to the atmospheric circulation in the tropics and therefore to the earth’s energy and hydrological cycles. However, their global structures are poorly known because of limited information from in ...

Jian Ling; Chidong Zhang

2013-05-01T23:59:59.000Z

90

Do Global Models Properly Represent the Feedback between Land and Atmosphere?  

Science Conference Proceedings (OSTI)

The Global Energy and Water Cycle Experiment/Climate Variability and Predictability (GEWEX/CLIVAR) Global Land–Atmosphere Coupling Experiment (GLACE) has provided an estimate of the global distribution of land–atmosphere coupling strength during ...

Paul A. Dirmeyer; Randal D. Koster; Zhichang Guo

2006-12-01T23:59:59.000Z

91

A Global Land System Framework for Integrated Climate-Change Assessments  

E-Print Network (OSTI)

Land ecosystems play a major role in the global cycles of energy, water, carbon and nutrients. A Global Land System (GLS) framework has been developed for the Integrated Global Systems Model Version 2 (IGSM2) to simulate ...

Schlosser, C. Adam

92

The Carbon Cycle  

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

Carbon Cycle Print E-mail U.S. Carbon Cycle Science Program U.S. Carbon Cycle Science Program The U.S. Carbon Cycle Science Program, in consultation with the Carbon Cycle...

93

Idaho National Laboratory - Hydropower Program: Hydrofacts  

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

How Hydropower Works The Hydrologic Cycle: Water constantly moves through a vast global cycle, in which it evaporates from lakes and oceans, forms clouds, precipitates as rain or...

94

Metrics-Based Feedback Cycles for Software Life-Cycle Management and Process Improvement  

E-Print Network (OSTI)

This paper summarizes a global organizational feedback cycle, composed of four component feedback cycles, by which the COCOMO II cost estimation model [Boehm et al., 2000] can be used for (1) project or product line scoping; (2) project or product line management; (3) model recalibration to changing circumstances; and (4) evaluation project, product line, or organizational continuous process improvement initiatives

Barry Boehm

2000-01-01T23:59:59.000Z

95

Global Warming and Extreme Weather  

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

Global Warming and Extreme Weather Global Warming and Extreme Weather Speaker(s): Michael Wehner Date: November 28, 2006 - 12:00pm Location: 90-3122 Seminar Host/Point of Contact: Surabi Menon Extreme weather events can have serious impacts on human and ecological systems. Changes in the magnitude and frequency of extreme weather associated with changes in the mean climate are likely the most serious consequence of human induced global warming. Understanding what the future portends is vital if society hopes to adapt to the very different world that awaits. In this talk, we will exploit simple extreme value theory to make predictions about the late 21st century climate. Current work on the relationship between global warming and the hurricane cycle will also be presented. The bottom line is that events that are considered rare today

96

Graph Invariants and Large Cycles - a Survey  

E-Print Network (OSTI)

Graph invariants are the best and single tools for investigation of abstract structures of graphs. They, combined in convenient relations, carry global and general information about a graph and its various substructures (cycle structures, factors, colorings, coverings, and so on). In this survey paper we have attempted to bring together all direct (pure) relations between basic invariants of a graph and its large cycle structures, perhaps the most important cycle structures, namely Hamilton, longest, dominating and some generalized cycles including Hamilton and dominating cycles as special cases. These very few relations actually form a source (basis) from which nearly all possible hamiltonian results can be developed further based on generalized and extended invariants, extended list of path or cycle structures and additional structural limitations.

Nikoghosyan, Zh G

2010-01-01T23:59:59.000Z

97

An Economic Analysis of Select Fuel Cycles Using the Steady-State Analysis Model for Advanced Fuel Cycles Schemes (SMAFS)  

Science Conference Proceedings (OSTI)

The U.S. Department of Energy's (DOE) Global Nuclear Energy Partnership (GNEP) is currently considering alternatives to the current U.S. once-through fuel cycle. This report evaluates the relative economics of three alternative fuel cycles to determine those cost components important to overall fuel cycle costs and total generation costs. The analysis determined that the unit cost of nuclear reactors is the most important nuclear generation cost parameter in future fuel cycles. The report also evaluates ...

2007-12-20T23:59:59.000Z

98

Combined Cycle Performance Monitoring and Recovery Guideline  

Science Conference Proceedings (OSTI)

The benefits of improved combined cycle power plant performance continue to grow as the cost of fuel rises and international concerns over global warming increase.This guideline provides a framework for performance monitoring, assessment, recovery and optimization of combined cycle power plants. The guideline distills existing experience and documents on heat rate recovery and capacity improvement into a comprehensive manual for plant implementation and training applications. The purpose ...

2012-12-31T23:59:59.000Z

99

Energy and Water Cycles in a High-Latitude, North-Flowing River System  

Science Conference Proceedings (OSTI)

The MacKenzie Global Energy and Water Cycle Experiment (GEWEX) Study, Phase 1, seeks to improve understanding of energy and water cycling in the Mackenzie River basin (MRB) and to initiate and test atmospheric, hydrologic, and coupled models that ...

W. R. Rouse; E. M. Blyth; R. W. Crawford; J. R. Gyakum; J. R. Janowicz; B. Kochtubajda; H. G. Leighton; P. Marsh; L. Martz; A. Pietroniro; H. Ritchie; W. M. Schertzer; E. D. Soulis; R. E. Stewart; G. S. Strong; M. K. Woo

2003-01-01T23:59:59.000Z

100

AN EXPLORATORY STUDY OF THE TERRESTRIAL BIOGEOCHEMICAL SILICON CYCLE AT A FORESTED WATERSHED IN NORTHERN VERMONT .  

E-Print Network (OSTI)

??The importance of the global silicon cycle is becoming increasingly recognized because of its role in the consumption of atmospheric CO2. However, the terrestrial component… (more)

Garvin, Christopher J.

2006-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "vast global cycle" 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

Global Nuclear Energy Partnership Fact Sheet - Develop Enhanced Nuclear  

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

Global Nuclear Energy Partnership Fact Sheet - Develop Enhanced Global Nuclear Energy Partnership Fact Sheet - Develop Enhanced Nuclear Safeguards Global Nuclear Energy Partnership Fact Sheet - Develop Enhanced Nuclear Safeguards GNEP will help prevent misuse of civilian nuclear facilities for nonpeaceful purposes by developing enhanced safeguards programs and technologies. International nuclear safeguards are integral to implementing the GNEP vision of a peaceful expansion of nuclear energy and demonstration of more proliferation-resistant fuel cycle technologies. Global Nuclear Energy Partnership Fact Sheet - Develop Enhanced Nuclear Safeguards More Documents & Publications GNEP Element:Develop Enhanced Nuclear Safeguards Global Nuclear Energy Partnership Fact Sheet Global Nuclear Energy Partnership Fact Sheet - Demonstrate Small-Scale

102

Projected Changes in the Seasonal Cycle of Surface Temperature  

Science Conference Proceedings (OSTI)

When forced with increasing greenhouse gases, global climate models project a delay in the phase and a reduction in the amplitude of the seasonal cycle of surface temperature, expressed as later minimum and maximum annual temperatures and greater ...

John G. Dwyer; Michela Biasutti; Adam H. Sobel

2012-09-01T23:59:59.000Z

103

Life-cycle assessment of wastewater treatment plants  

E-Print Network (OSTI)

This thesis presents a general model for the carbon footprints analysis of wastewater treatment plants (WWTPs), using a life cycle assessment (LCA) approach. In previous research, the issue of global warming is often related ...

Dong, Bo, M. Eng. Massachusetts Institute of Technology

2012-01-01T23:59:59.000Z

104

Global climate change and pedogenic carbonates  

SciTech Connect

Global Climate Change summarizes what is known about soil inorganic carbon and develops strategies that could lead to the retention of more carbon in the soil. It covers basic concepts, analytical methods, secondary carbonates, and research and development priorities. With this book one will get a better understanding of the global carbon cycle, organic and inorganic carbon, and their roles, or what is known of them, in the greenhouse effect.

Lal, R.; Kimble, J.M.; Stewart, B.A.; Eswaran, H. [eds.

1999-11-01T23:59:59.000Z

105

Atmospheric Moisture Transports from Ocean to Land and Global Energy Flows in Reanalyses  

Science Conference Proceedings (OSTI)

An assessment is made of the global energy and hydrological cycles from eight current atmospheric reanalyses and their depiction of changes over time. A brief evaluation of the water and energy cycles in the latest version of the NCAR climate ...

Kevin E. Trenberth; John T. Fasullo; Jessica Mackaro

2011-09-01T23:59:59.000Z

106

Global Multimodel Analysis of Drought in Runoff for the Second Half of the Twentieth Century  

Science Conference Proceedings (OSTI)

During the past decades large-scale models have been developed to simulate global and continental terrestrial water cycles. It is an open question whether these models are suitable to capture hydrological drought, in terms of runoff, on a global ...

M. H. J. van Huijgevoort; P. Hazenberg; H. A. J. van Lanen; A. J. Teuling; D. B. Clark; S. Folwell; S. N. Gosling; N. Hanasaki; J. Heinke; S. Koirala; T. Stacke; F. Voss; J. Sheffield; R. Uijlenhoet

2013-10-01T23:59:59.000Z

107

A Comparison of Latent Heat Fluxes over Global Oceans for Four Flux Products  

Science Conference Proceedings (OSTI)

The ocean surface latent heat flux (LHF) plays an essential role in global energy and water cycle variability. In this study, monthly LHF over global oceans during 1992–93 are compared among Goddard Satellite-Based Surface Turbulent Fluxes, ...

Shu-Hsien Chou; Eric Nelkin; Joe Ardizzone; Robert M. Atlas

2004-10-01T23:59:59.000Z

108

A Strategy (Vision) for Integrated Water Cycle  

E-Print Network (OSTI)

resource applications. What are the observation and accuracy needs for global water and energy cycle, to provide enhanced information? #12;---- Initially Close Energy/WaterInitially Close Energy/Water Budgets at ContinentalBudgets at Continental--ScaleScale ---- Couple (land/hydroCouple (land/hydro -- atmosatmos) at the

Houser, Paul R.

109

E h iE h iEnhancingEnhancing Water & Energy CycleWater & Energy Cycle  

E-Print Network (OSTI)

2008, Page 10 based studies using satellite data for applications such as Hydro- energy management. #12E h iE h iEnhancingEnhancing Water & Energy CycleWater & Energy Cycle R h & A li tiR h & A li ti, AMS Panel, 6 February 2008, Page 1http://crew.iges.org #12;TheThe Global WaterGlobal Water and Energy

Houser, Paul R.

110

Life Cycle Engineering Group  

Science Conference Proceedings (OSTI)

... for green manufacturing and construction applications; conduct life cycle engineering assessments for energy efficiency and environmental ...

2012-08-23T23:59:59.000Z

111

On the Global Variation of Precipitating Layer Clouds  

Science Conference Proceedings (OSTI)

The aim of the Global Energy and Water Cycle Experiment Cloud System Study (GCSS) is to promote the description and understanding of key cloud system processes, with the aim of developing and improving the representation of cloud processes in ...

B. F. Ryan

1996-01-01T23:59:59.000Z

112

A Prognostic Cloud Water Parameterization for Global Climate Models  

Science Conference Proceedings (OSTI)

An efficient new prognostic cloud water parameterization designed for use in global climate models is described. The scheme allows for life cycle effects in stratiform clouds and permits cloud optical properties to be determined interactively. ...

Anthony D. Del Genio; Mao-Sung Yao; William Kovari; Kenneth K-W. Lo

1996-02-01T23:59:59.000Z

113

Quantifying Carbon Cycle Feedbacks  

Science Conference Proceedings (OSTI)

Perturbations to the carbon cycle could constitute large feedbacks on future changes in atmospheric CO2 concentration and climate. This paper demonstrates how carbon cycle feedback can be expressed in formally similar ways to climate feedback, ...

J. M. Gregory; C. D. Jones; P. Cadule; P. Friedlingstein

2009-10-01T23:59:59.000Z

114

Edgeworth cycles revisited  

E-Print Network (OSTI)

Some gasoline markets exhibit remarkable price cycles, where price spikes are followed by a series of small price declines: a pattern consistent with a model of Edgeworth cycles described by Maskin and Tirole. We extend ...

Doyle, Joseph J.

115

Cosmic global strings  

SciTech Connect

This paper discusses the following topics: Global Strings; The Gravitational field of a straight global string; How do global strings behave The axion cosmological energy density; Computer simulations of the motion and decay of global strings; and Electromagnetic radiation from the conversion of Nambu-Goldstone bosons in astrophysical magnetic fields.

Sikivie, P. (Florida Univ., Gainesville, FL (USA). Dept. of Physics)

1990-01-01T23:59:59.000Z

116

Cycle to Cycle Manufacturing Process Control  

E-Print Network (OSTI)

Most manufacturing processes produce parts that can only be correctly measured after the process cycle has been completed. Even if in-process measurement and control is possible, it is often too expensive or complex to ...

Hardt, David E.

117

THE CARBON CYCLE FROM NORTH TO SOUTH ALONG THE GALATHEA 3 ROUTE  

E-Print Network (OSTI)

THE CARBON CYCLE FROM NORTH TO SOUTH ALONG THE GALATHEA 3 ROUTE Merete Bruun Christiansen (1 in the Galathea 3 expedition. Among the larger projects is `The marine carbon cycle from north to south along in the global carbon cycle. The World's open oceans are considered to be net absorbers of carbon dioxide (CO2

118

Global multi-model analysis of drought in runoff for the second half of the 20th century  

Science Conference Proceedings (OSTI)

During the past decades large-scale models have been developed to simulate global and continental terrestrial water cycles. It is an open question whether these models are suitable to capture hydrological drought, in terms of runoff, on global ...

M. H. J. van Huijgevoort; P. Hazenberg; H. A. J. van Lanen; A. J. Teuling; D. B. Clark; S. Folwell; S. N. Gosling; N. Hanasaki; J. Heinke; S. Koirala; T. Stacke; F. Voss; J. Sheffield; R. Uijlenhoet

119

Comparative Global Warming Impacts of Electric Vapor-Compression and Direct-fired Absorption Equipment  

Science Conference Proceedings (OSTI)

This report compares the global warming impacts of electric vapor-compression and gas-fired absorption-cycle equipment for commercial cooling applications. Absorption chillers do not use ozone depleting refrigerants but substitution of alternative refrigerants in electrically driven vapor-compression cycle equipment also offers radically reduced or eliminated potential for stratospheric ozone depletion. Therefore, when comparing absorption-cycle and vapor-compression equipment, net global warming impacts...

1994-03-01T23:59:59.000Z

120

Safeguarding and Protecting the Nuclear Fuel Cycle  

Science Conference Proceedings (OSTI)

International safeguards as applied by the International Atomic Energy Agency (IAEA) are a vital cornerstone of the global nuclear nonproliferation regime - they protect against the peaceful nuclear fuel cycle becoming the undetected vehicle for nuclear weapons proliferation by States. Likewise, domestic safeguards and nuclear security are essential to combating theft, sabotage, and nuclear terrorism by non-State actors. While current approaches to safeguarding and protecting the nuclear fuel cycle have been very successful, there is significant, active interest to further improve the efficiency and effectiveness of safeguards and security, particularly in light of the anticipated growth of nuclear energy and the increase in the global threat environment. This article will address two recent developments called Safeguards-by-Design and Security-by-Design, which are receiving increasing broad international attention and support. Expected benefits include facilities that are inherently more economical to effectively safeguard and protect. However, the technical measures of safeguards and security alone are not enough - they must continue to be broadly supported by dynamic and adaptive nonproliferation and security regimes. To this end, at the level of the global fuel cycle architecture, 'nonproliferation and security by design' remains a worthy objective that is also the subject of very active, international focus.

Trond Bjornard; Humberto Garcia; William Desmond; Scott Demuth

2010-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "vast global cycle" 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

An integrated approach to modelling land-use change on continental and global scales  

Science Conference Proceedings (OSTI)

Land-use and land-cover change are important drivers of global environmental change, affecting the state of biodiversity, the global carbon cycle, and other aspects of the earth system. In this article we describe the development of the land-use model ... Keywords: Continental and global scale land-use change modelling, Human-environment interaction, Land-use systems, Model framework

Rüdiger Schaldach; Joseph Alcamo; Jennifer Koch; Christina Kölking; David M. Lapola; Jan Schüngel; Jörg A. Priess

2011-08-01T23:59:59.000Z

122

Review: Globalization of Water  

E-Print Network (OSTI)

Review: Globalization of Water: Sharing the Planet’sAshok K. Globalization of Water: Sharing the Planet’s140) liters of virtual water (p. 15). This is one of the

Tennant, Matthew Aaron

2009-01-01T23:59:59.000Z

123

Duty Cycle Software  

Duty cycles capture the influence of one variable in relations to the whole system. This allows for analysis in determining the impact of new ...

124

Nuclear fuel cycle costs  

Science Conference Proceedings (OSTI)

The costs for the back-end of the nuclear fuel cycle, which were developed as part of the Nonproliferation Alternative Systems Assessment Program (NASAP), are presented. Total fuel cycle costs are given for the pressurized water reactor once-through and fuel recycle systems, and for the liquid-metal fast breeder reactor system. These calculations show that fuel cycle costs are a small part of the total power costs. For breeder reactors, fuel cycle costs are about half that of the present once-through system. The total power cost of the breeder reactor system is greater than that of light-water reactor at today's prices for uranium and enrichment.

Burch, W.D.; Haire, M.J.; Rainey, R.H.

1982-02-01T23:59:59.000Z

125

Global Energy Perspectives  

U.S. Energy Information Administration (EIA)

Global Energy Perspectives: Supply Security, Economic Development and Sustainability The Annual Energy Policy Conference of the National Capital Area ...

126

Global Security 2009  

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

Security *Intelligence *Hyper Innovation Global Security Weapons & Complex Integration NIF Office of Strategic Outcomes Operations & Business Lawrence Livermore National...

127

Global Nuclear Energy Partnership Fact Sheet - Establish Reliable Fuel  

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

Global Nuclear Energy Partnership Fact Sheet - Establish Reliable Global Nuclear Energy Partnership Fact Sheet - Establish Reliable Fuel Services Global Nuclear Energy Partnership Fact Sheet - Establish Reliable Fuel Services GNEP would build and strengthen a reliable international fuel services consortium under which "fuel supplier nations" would choose to operate both nuclear power plants and fuel production and handling facilities, providing reliable fuel services to "user nations" that choose to only operate nuclear power plants. This international consortium is a critical component of the GNEP initiative to build an improved, more proliferation-resistant nuclear fuel cycle that recycles used fuel, while Global Nuclear Energy Partnership Fact Sheet - Establish Reliable Fuel Services More Documents & Publications

128

Power Plant Cycling Costs  

Science Conference Proceedings (OSTI)

This report provides a detailed review of the most up to date data available on power plant cycling costs. The primary objective of this report is to increase awareness of power plant cycling cost, the use of these costs in renewable integration studies and to stimulate debate between policymakers, system dispatchers, plant personnel and power utilities.

Kumar, N.; Besuner, P.; Lefton, S.; Agan, D.; Hilleman, D.

2012-07-01T23:59:59.000Z

129

Selected papers for global `95 concerning plutonium  

SciTech Connect

This report contains selected papers from the Global `95 Conference ``Evaluation of Emerging Nuclear Fuel Cycle Systems,`` held in Versailles, Sept. 11-14, 1995. The 11 papers in Part I are from ``Benefits and Risks of Reprocessing`` sessions. The 7 papers in Part II are some of the more interesting poster papers that relate to the use of Pu for power generation. Finally, the 3 papers are on the topic of management and disposition of Pu from retired nuclear weapons.

Sutcliffe, W.G. [ed.

1996-06-14T23:59:59.000Z

130

Global Climate Change Links  

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

Global Climate Change Links Global Climate Change Links This page provides links to web pages that we at CDIAC feel do a responsible job of presenting information and discussion pertinent to the science behind the global climate change ("global warming") debate. These sites include those on both sides of the debate; some asserting that global warming is a clear and present danger, and others that might be labeled global warming "skeptics." Some of these sites don't take a position per se; they exist to offer the public objective scientific information and results on our present understanding of the climate system. The list is not intended to be comprehensive, by any means. We hope it will be especially helpful for those who may be just beginning their research into global

131

The Anderson Quin Cycle  

SciTech Connect

The objective of this study was to make a more refined evaluation of the Anderson Quin Cycle based on most recent information on the performance of various elements that will be used in the Anderson Quin Cycle. My original estimate of the work plan for evaluating and optimizing the Anderson Quin Cycle called for 7000 man hours of work. Since this grant was limited to 2150 man hours, we could not expect to achieve all the objectives within the allotted period of work. However, the most relevant program objectives have been completed as reported here. The analysis generally confirms the results originally estimated in my paper on the subject. (Ref. 2) Further optimizations should show even higher efficiencies. The Anderson Quin Cycle (US Patent applied for) basically consists of 5 elements in the power cycle: A refrigeration system to cool and clean the inlet air before it enters the compressor that supplies air for the gas turbine; a gas turbine consisting of a compressor, combustor, and turbine; a steam boiler and steam turbine system using the heat from the exhaust gas out of the gas turbine; a vapor turbine cycle, which utilizes the condensed heat from the exhaust of the steam turbine and the exhaust gas heat leaving the steam boiler to operate a vapor turbine cycle which utilizes another fluid than water, in this case isobutane; and the fifth element consists of a gas cooler and heat pump system, which removes the heat from the exhaust gas to lower its temperature essentially to atmospheric temperature, and at the same time permits treatment of the exhaust gas to remove acid components such as sulfur dioxide and nitrogen oxides. Current industry accepted component characteristics were incorporated in the performance analysis of the overall cycle, ensuring accurate and meaningful operating predictions. The characteristics and performance of each of the elements are described. The thermal efficiency of the optimized calculated Anderson Quin Cycle is 62 percent.

Anderson, J.H.; Bilbow, W.M.

1993-03-18T23:59:59.000Z

132

2013 Global Carbon Project  

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

2013 Global Carbon Project 2013 Global Carbon Project DOI: 10.3334/CDIAC/GCP_2013_V1.1 image 2013 Budget v1.1 (November 2013) image 2013 Budget v1.3 (December 2013, contains typographical corrections to 2011 Australia emissions from v1.1 and corrections to the 2011 Australia transfer and consumption emissions from v1.2) image image image image Global Carbon Dioxide Emissions to Reach 36 Billion Tonnes in 2013 Global emissions of carbon dioxide from the combustion of fossil fuels will reach 36 billion tonnes for the year 2013. "This is a level unprecedented in human history," says CSIRO's Dr Pep Canadell, Executive-Director of the Global Carbon Project (GCP) and co-author of a new report. Global emissions due to fossil fuel alone are set to grow this year at a slightly lower pace of 2.1% than the average 3.1% since 2000, reaching 36

133

Cycle isolation monitoring  

SciTech Connect

There are many factors to monitor in power plants, but one that is frequently overlooked is cycle isolation. Often this is an area where plant personnel can find 'low hanging fruit' with great return on investment, especially high energy valve leakage. This type of leakage leads to increased heat rate, potential valve damage and lost generation. The fundamental question to ask is 'What is 100 Btu/kW-hr of heat rate worth to your plant? On a 600 MW coal-fired power plant, a 1% leakage can lead to an 81 Btu/kW-hr impact on the main steam cycle and a 64 Btu/kW-hr impact on the hot reheat cycle. The article gives advice on methods to assist in detecting leaking valves and to monitor cycle isolation. A software product, TP. Plus-CIM was designed to estimate flow rates of potentially leaking valves.

Svensen, L.M. III; Zeigler, J.R.; Todd, F.D.; Alder, G.C. [Santee Copper, Moncks Corner, SC (United States)

2009-07-15T23:59:59.000Z

134

Cycle Chemistry Improvement Program  

Science Conference Proceedings (OSTI)

The purity of water and steam is central to ensuring fossil plant component availability and reliability. This report, which describes formal cycle chemistry improvement programs at nine utilities, will assist utilities in achieving significant operation and maintenance cost reductions.

1997-04-21T23:59:59.000Z

135

Crude Oil Price Cycles  

Gasoline and Diesel Fuel Update (EIA)

The heating oil and diesel fuel price runups in late January were made even more problematic by coming on top of the high side of the latest crude market cycle. Over the past 10...

136

Crude Oil Price Cycles  

U.S. Energy Information Administration (EIA)

The heating oil and diesel price runups in late January were made even more problematic by coming on top of the high side of the latest crude market cycle.

137

The Annual Agricultural Cycle  

E-Print Network (OSTI)

. Sman shad agriculture 1.WAV Length of track 00:44:03 Related tracks (include description/relationship if appropriate) Title of track The Annual Agricultural Cycle Translation of title Description (to be used in archive entry...

Zla ba sgrol ma

2009-11-16T23:59:59.000Z

138

Application of chemical kinetics to mercury cycling in the aquatic environment: Photoreduction of mercury(II) and binding of mercury(II) and methylmercury(+) to natural ligands .  

E-Print Network (OSTI)

??The thesis comprises four main chapters on chemical reactions and kinetics of some of the processes involved in the global mercury cycle. In the first… (more)

Ababneh, Fuad A

2013-01-01T23:59:59.000Z

139

Global Oil Geopolitics  

U.S. Energy Information Administration (EIA)

Iran-Iraq War . Iranian revolution . Arab Oil Embargo . Asian financial crisis . capacity exhausted . Global financial collapse . 9-11 attacks . OPEC cuts targets 1.7 ...

140

Cleantech Professional Resource Global Limited CPR Global | Open Energy  

Open Energy Info (EERE)

Professional Resource Global Limited CPR Global Professional Resource Global Limited CPR Global Jump to: navigation, search Name Cleantech Professional Resource Global Limited (CPR Global) Place London, United Kingdom Zip EC4M 9DN Product Cleantech Professional Resource is a resource management consultancy focusing on the cleantech sector in the UK and Europe. References Cleantech Professional Resource Global Limited (CPR Global)[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. Cleantech Professional Resource Global Limited (CPR Global) is a company located in London, United Kingdom . References ↑ "Cleantech Professional Resource Global Limited (CPR Global)" Retrieved from "http://en.openei.org/w/index.php?title=Cleantech_Professional_Resource_Global_Limited_CPR_Global&oldid=343687

Note: This page contains sample records for the topic "vast global cycle" 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

Secular Cycles and Millennial Trends  

E-Print Network (OSTI)

both secular cycles and millennial up- ward trend dynamics.Cycles and Millennial Trends by Andrey Korotayev, ArtemySecular Cycles and Millennial Trends 1 Initially, we want to

Korotayev, Andrey V; Malkov, Artemy S; Khaltourina, Daria A

2006-01-01T23:59:59.000Z

142

Tensions in Global Power and Fuel Sector Development  

Science Conference Proceedings (OSTI)

The world has been through its steepest ever commodity cycle in the past year. The current study attempts to make sense of the dramatic swings in the energy markets by closely examining market fundamentals and identifying the critical considerations and constraints that explain their progression. The study builds on a foundation of EPRI studies conducted in 2007-2008 on global generation decisions and global natural gas and coal markets. It offers timely reassessments of natural gas and coal, adds a disc...

2009-03-30T23:59:59.000Z

143

Modeling Potential Equilibrium States of Vegetation and Terrestrial Water Cycle of Mesoamerica under Climate Change Scenarios  

Science Conference Proceedings (OSTI)

The likelihood and magnitude of the impacts of climate change on potential vegetation and the water cycle in Mesoamerica is evaluated. Mesoamerica is a global biodiversity hotspot with highly diverse topographic and climatic conditions and is ...

Pablo Imbach; Luis Molina; Bruno Locatelli; Olivier Roupsard; Gil Mahé; Ronald Neilson; Lenin Corrales; Marko Scholze; Philippe Ciais

2012-04-01T23:59:59.000Z

144

The Annual Cycle of the Energy Budget. Part II: Meridional Structures and Poleward Transports  

Science Conference Proceedings (OSTI)

Meridional structure and transports of energy in the atmosphere, ocean, and land are evaluated holistically for the mean and annual cycle zonal averages over the ocean, land, and global domains, with discussion and assessment of uncertainty. At ...

John T. Fasullo; Kevin E. Trenberth

2008-05-01T23:59:59.000Z

145

Analysis of the Arctic System for Freshwater Cycle Intensification: Observations and Expectations  

Science Conference Proceedings (OSTI)

Hydrologic cycle intensification is an expected manifestation of a warming climate. Although positive trends in several global average quantities have been reported, no previous studies have documented broad intensification across elements of the ...

Michael A. Rawlins; Michael Steele; Marika M. Holland; Jennifer C. Adam; Jessica E. Cherry; Jennifer A. Francis; Pavel Ya Groisman; Larry D. Hinzman; Thomas G. Huntington; Douglas L. Kane; John S. Kimball; Ron Kwok; Richard B. Lammers; Craig M. Lee; Dennis P. Lettenmaier; Kyle C. McDonald; Erika Podest; Jonathan W. Pundsack; Bert Rudels; Mark C. Serreze; Alexander Shiklomanov; Øystein Skagseth; Tara J. Troy; Charles J. Vörösmarty; Mark Wensnahan; Eric F. Wood; Rebecca Woodgate; Daqing Yang; Ke Zhang; Tingjun Zhang

2010-11-01T23:59:59.000Z

146

Heat Waves, Global Warming, and Mitigation  

E-Print Network (OSTI)

the errors in disaster planning, preparation and response to2. Government Response to Disasters .. HEAT WAVEgov- ernment response to the disaster, and the vastly larger

Carlson, Ann E.

2008-01-01T23:59:59.000Z

147

Defining a changing world: the discourse of globalization  

E-Print Network (OSTI)

Globalization has, within academic, political and business circles alike, become a prominent buzzword of the past decade, conjuring a diversity of associations, connotations and attendant mythologies. The literature devoted to the issue of globalization is both vast in scope and diverse in nature, becoming increasingly prominent not only in academics and politics, but in the popular press, as well. The goal of this dissertation is to provide the reader with a map of themes, narratives, and characterizations related to globalization circulating in the United States in order to demonstrate the potential ways that individual thought on the issue is shaped by public discourse. A secondary goal is to critically examine specific texts to identify areas where their arguments overlap, conflict, or may be misconstrued due to weak or inaccurate evidence. By better understanding the map of rhetorical formations in widely-read texts regarding globalization, it may be possible for people to be better able to understand the concerns and intentions of those voicing various and often competing viewpoints.

Teubner, Gillian

2003-05-01T23:59:59.000Z

148

Fuel Cycle and Isotopes Division  

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

Divisions Fuel Cycle and Isotopes Division Jeffrey Binder, Division Director Jeffrey Binder, Division Director The Fuel Cycle and Isotopes Division (FCID) of the Nuclear Science...

149

IGBP-DIS Global Primary Production Data Initiative  

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

IGBP-DIS Global Primary Production Data Initiative IGBP-DIS Global Primary Production Data Initiative The GPPDI Workshop was held in Cincinnati, U.S.A., December 1996 (Olson et al., 1997). Summary (September 1996) by Dick Olson and Steve Prince from Global Change Newsletter No. 27; International Geosphere-Biosphere Programme: A Study of Global Change (IGBP) of the International Council of Scientific Unions Global modelling and monitoring of net primary production (NPP) is being given high priority in IGBP owing to increasing concern over issues such as the consequences of perturbations in the carbon cycle, the impacts of global land-use change, global climate change, and global food security. Significant advances have been made in process modelling and in the use of remote sensing to monitor global vegetation. The advances in modelling and remote sensing of NPP have highlighted the lack of readily available, reliable information from field studies with which to parameterise and validate the models. The Global Primary Production Data Initiative (GPPDI) is intended to remedy this problem by identifying existing field data sets of primary production and associated environmental data. The programme is using data sets for representative sites, and extrapolating or regionalising the better data sets to grid cells sizes of up to 0.5º x 0.5º. Emphasis is on variables needed to parameterise and validate primary production models, including above and below ground NPP, standing crop, LAI, climate data, site data and landscape variability.

150

Helium process cycle  

DOE Patents (OSTI)

A unique process cycle and apparatus design separates the consumer (cryogenic) load return flow from most of the recycle return flow of a refrigerator and/or liquefier process cycle. The refrigerator and/or liquefier process recycle return flow is recompressed by a multi-stage compressor set and the consumer load return flow is recompressed by an independent consumer load compressor set that maintains a desirable constant suction pressure using a consumer load bypass control valve and the consumer load return pressure control valve that controls the consumer load compressor's suction pressure. The discharge pressure of this consumer load compressor is thereby allowed to float at the intermediate pressure in between the first and second stage recycle compressor sets. Utilizing the unique gas management valve regulation, the unique process cycle and apparatus design in which the consumer load return flow is separate from the recycle return flow, the pressure ratios of each recycle compressor stage and all main pressures associated with the recycle return flow are allowed to vary naturally, thus providing a naturally regulated and balanced floating pressure process cycle that maintains optimal efficiency at design and off-design process cycle capacity and conditions automatically.

Ganni, Venkatarao (Yorktown, VA)

2007-10-09T23:59:59.000Z

151

Helium process cycle  

SciTech Connect

A unique process cycle and apparatus design separates the consumer (cryogenic) load return flow from most of the recycle return flow of a refrigerator and/or liquefier process cycle. The refrigerator and/or liquefier process recycle return flow is recompressed by a multi-stage compressor set and the consumer load return flow is recompressed by an independent consumer load compressor set that maintains a desirable constant suction pressure using a consumer load bypass control valve and the consumer load return pressure control valve that controls the consumer load compressor's suction pressure. The discharge pressure of this consumer load compressor is thereby allowed to float at the intermediate pressure in between the first and second stage recycle compressor sets. Utilizing the unique gas management valve regulation, the unique process cycle and apparatus design in which the consumer load return flow is separate from the recycle return flow, the pressure ratios of each recycle compressor stage and all main pressures associated with the recycle return flow are allowed to vary naturally, thus providing a naturally regulated and balanced floating pressure process cycle that maintains optimal efficiency at design and off-design process cycle capacity and conditions automatically.

Ganni, Venkatarao (Yorktown, VA)

2007-10-09T23:59:59.000Z

152

Helium process cycle  

DOE Patents (OSTI)

A unique process cycle and apparatus design separates the consumer (cryogenic) load return flow from most of the recycle return flow of a refrigerator and/or liquefier process cycle. The refrigerator and/or liquefier process recycle return flow is recompressed by a multi-stage compressor set and the consumer load return flow is recompressed by an independent consumer load compressor set that maintains a desirable constant suction pressure using a consumer load bypass control valve and the consumer load return pressure control valve that controls the consumer load compressor's suction pressure. The discharge pressure of this consumer load compressor is thereby allowed to float at the intermediate pressure in between the first and second stage recycle compressor sets. Utilizing the unique gas management valve regulation, the unique process cycle and apparatus design in which the consumer load return flow is separate from the recycle return flow, the pressure ratios of each recycle compressor stage and all main pressures associated with the recycle return flow are allowed to vary naturally, thus providing a naturally regulated and balanced floating pressure process cycle that maintains optimal efficiency at design and off-design process cycle capacity and conditions automatically.

Ganni, Venkatarao (Yorktown, VA)

2008-08-12T23:59:59.000Z

153

Life Cycle Greenhouse Gas Emissions from Electricity Generation (Fact Sheet), NREL (National Renewable Energy Laboratory)  

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

LCA can help determine environmental burdens from "cradle LCA can help determine environmental burdens from "cradle to grave" and facilitate more consistent comparisons of energy technologies. Figure 1. Generalized life cycle stages for energy technologies Source: Sathaye et al. (2011) Life cycle GHG emissions from renewable electricity generation technologies are generally less than those from fossil fuel-based technologies, based on evidence assembled by this project. Further, the proportion of GHG emissions from each life cycle stage differs by technology. For fossil-fueled technologies, fuel combustion during operation of the facility emits the vast majority of GHGs. For nuclear and renewable energy technologies, the majority of GHG emissions occur upstream of operation. LCA of Energy Systems

154

TITAN'S TRANSPORT-DRIVEN METHANE CYCLE  

SciTech Connect

The mechanisms behind the occurrence of large cloud outbursts and precipitation on Titan have been disputed. A global- and annual-mean estimate of surface fluxes indicated only 1% of the insolation, or {approx}0.04 W m{sup -2}, is exchanged as sensible and/or latent fluxes. Since these fluxes are responsible for driving atmospheric convection, it has been argued that moist convection should be quite rare and precipitation even rarer, even if evaporation globally dominates the surface-atmosphere energy exchange. In contrast, climate simulations indicate substantial cloud formation and/or precipitation. We argue that the top-of-atmosphere (TOA) radiative imbalance is diagnostic of horizontal heat transport by Titan's atmosphere, and thus constrains the strength of the methane cycle. Simple calculations show the TOA radiative imbalance is {approx}0.5-1 W m{sup -2} in Titan's equatorial region, which implies 2-3 MW of latitudinal heat transport by the atmosphere. Our simulation of Titan's climate suggests this transport may occur primarily as latent heat, with net evaporation at the equator and net accumulation at higher latitudes. Thus, the methane cycle could be 10-20 times previous estimates. Opposing seasonal transport at solstices, compensation by sensible heat transport, and focusing of precipitation by large-scale dynamics could further enhance the local, instantaneous strength of Titan's methane cycle by a factor of several. A limited supply of surface liquids in regions of large surface radiative imbalance may throttle the methane cycle, and if so, we predict more frequent large storms over the lakes district during Titan's northern summer.

Mitchell, Jonathan L. [Department of Earth and Space Sciences, Department of Atmospheric and Oceanic Sciences, University of California, Los Angeles, CA 90095 (United States)

2012-09-10T23:59:59.000Z

155

Global Nuclear Energy Partnership Fact Sheet - Develop Advanced Burner  

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

Develop Advanced Develop Advanced Burner Reactors Global Nuclear Energy Partnership Fact Sheet - Develop Advanced Burner Reactors GNEP will develop and demonstrate Advanced Burner Reactors (ABRs) that consume transuranic elements (plutonium and other long-lived radioactive material) while extracting their energy. The development of ABRs will allow us to build an improved nuclear fuel cycle that recycles used fuel. Accordingly, the U.S. will work with participating international partners on the design, development, and demonstration of ABRs as part of the GNEP. Global Nuclear Energy Partnership Fact Sheet - Develop Advanced Burner Reactors More Documents & Publications GNEP Element:Develop Advanced Burner Reactors Global Nuclear Energy Partnership Fact Sheet - Minimize Nuclear Waste

156

Power Plant Cycling Costs  

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

Power Plant Cycling Costs Power Plant Cycling Costs April 2012 N. Kumar, P. Besuner, S. Lefton, D. Agan, and D. Hilleman Intertek APTECH Sunnyvale, California NREL Technical Monitor: Debra Lew Subcontract Report NREL/SR-5500-55433 July 2012 NREL is a national laboratory of the U.S. Department of Energy, Office of Energy Efficiency & Renewable Energy, operated by the Alliance for Sustainable Energy, LLC. National Renewable Energy Laboratory 15013 Denver West Parkway Golden, Colorado 80401 303-275-3000 * www.nrel.gov Contract No. DE-AC36-08GO28308 Power Plant Cycling Costs April 2012 N. Kumar, P. Besuner, S. Lefton, D. Agan, and D. Hilleman Intertek APTECH Sunnyvale, California NREL Technical Monitor: Debra Lew Prepared under Subcontract No. NFT-1-11325-01

157

Superfluid thermodynamic cycle refrigerator  

DOE Patents (OSTI)

This invention is comprised of a cryogenic refrigerator which cools a heat source by cyclically concentrating and diluting the amount of [sup 3]He in a single phase [sup 3]He/[sup 4]He solution. The [sup 3]He in superfluid [sup 4]He acts in a manner of an ideal gas in a vacuum. Thus, refrigeration is obtained using any conventional thermal cycle, but preferably a Stirling or Carnot cycle. A single phase solution of liquid [sup 3]He at an initial concentration in superfluid [sup 4]He is contained in a first variable volume connected to a second variable volume through a superleak device that enables free passage of [sup 4]He while restricting passage of [sup 3]He. The [sup 3]He is compressed (concentrated) and expanded (diluted) in a phased manner to carry out the selected thermal cycle to remove heat from the heat load for cooling below 1 K.

Swift, G.W.; Kotsubo, V.Y.

1991-04-02T23:59:59.000Z

158

Superfluid thermodynamic cycle refrigerator  

DOE Patents (OSTI)

A cryogenic refrigerator cools a heat source by cyclically concentrating and diluting the amount of [sup 3]He in a single phase [sup 3]He-[sup 4]He solution. The [sup 3]He in superfluid [sup 4]He acts in a manner of an ideal gas in a vacuum. Thus, refrigeration is obtained using any conventional thermal cycle, but preferably a Stirling or Carnot cycle. A single phase solution of liquid [sup 3]He at an initial concentration in superfluid [sup 4]He is contained in a first variable volume connected to a second variable volume through a superleak device that enables free passage of [sup 4]He while restricting passage of [sup 3]He. The [sup 3]He is compressed (concentrated) and expanded (diluted) in a phased manner to carry out the selected thermal cycle to remove heat from the heat load for cooling below 1 K. 12 figs.

Swift, G.W.; Kotsubo, V.Y.

1992-12-22T23:59:59.000Z

159

Superfluid thermodynamic cycle refrigerator  

DOE Patents (OSTI)

This invention is comprised of a cryogenic refrigerator which cools a heat source by cyclically concentrating and diluting the amount of {sup 3}He in a single phase {sup 3}He/{sup 4}He solution. The {sup 3}He in superfluid {sup 4}He acts in a manner of an ideal gas in a vacuum. Thus, refrigeration is obtained using any conventional thermal cycle, but preferably a Stirling or Carnot cycle. A single phase solution of liquid {sup 3}He at an initial concentration in superfluid {sup 4}He is contained in a first variable volume connected to a second variable volume through a superleak device that enables free passage of {sup 4}He while restricting passage of {sup 3}He. The {sup 3}He is compressed (concentrated) and expanded (diluted) in a phased manner to carry out the selected thermal cycle to remove heat from the heat load for cooling below 1 K.

Swift, G.W.; Kotsubo, V.Y.

1991-04-02T23:59:59.000Z

160

Superfluid thermodynamic cycle refrigerator  

DOE Patents (OSTI)

A cryogenic refrigerator cools a heat source by cyclically concentrating and diluting the amount of .sup.3 He in a single phase .sup.3 He-.sup.4 He solution. The .sup.3 He in superfluid .sup.4 He acts in a manner of an ideal gas in a vacuum. Thus, refrigeration is obtained using any conventional thermal cycle, but preferably a Stirling or Carnot cycle. A single phase solution of liquid .sup.3 He at an initial concentration in superfluid .sup.4 He is contained in a first variable volume connected to a second variable volume through a superleak device that enables free passage of .sup.4 He while restricting passage of .sup.3 He. The .sup.3 He is compressed (concentrated) and expanded (diluted) in a phased manner to carry out the selected thermal cycle to remove heat from the heat load for cooling below 1 K.

Swift, Gregory W. (Santa Fe, NM); Kotsubo, Vincent Y. (La Canada, CA)

1992-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "vast global cycle" 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

NOAA's Second-Generation Global Medium-Range Ensemble Reforecast Dataset  

Science Conference Proceedings (OSTI)

A multidecadal ensemble reforecast database is now available that is approximately consistent with the operational 0000 UTC cycle of the 2012 NOAA Global Ensemble Forecast System (GEFS). The reforecast dataset consists of an 11-member ensemble run once ...

Thomas M. Hamill; Gary T. Bates; Jeffrey S. Whitaker; Donald R. Murray; Michael Fiorino; Thomas J. Galarneau Jr.; Yuejian Zhu; William Lapenta

2013-10-01T23:59:59.000Z

162

Advancing Global-and Continental-Scale Hydrometeorology: Contributions of GEWEX Hydrometeorology Panel  

Science Conference Proceedings (OSTI)

Over the past 9 years, the Global Energy and Water Cycle Experiment (GEWEX), under the auspices of the World Climate Research Programme (WCRP), has coordinated the activities of the Continental Scale Experiments (CSEs) and other related research ...

R. G. Lawford; R. Stewart; J. Roads; H-J. Isemer; M. Manton; J. Marengo; T. Yasunari; S. Benedict; T. Koike; S. Williams

2004-12-01T23:59:59.000Z

163

On Numerical Simulation of the Global Distribution of Sulfate Aerosol Produced by a Large Volcanic Eruption  

Science Conference Proceedings (OSTI)

Volcanic eruptions play an important role in the global sulfur cycle of the earth's atmosphere and have a relatively big influence on potential fluctuations of the atmospheric variables on both subclimatic and climatic scales. The objective of ...

J. A. Pudykiewicz; A. P. Dastoor

1995-03-01T23:59:59.000Z

164

The CALIPSO Mission: A Global 3D View of Aerosols and Clouds  

Science Conference Proceedings (OSTI)

Aerosols and clouds have important effects on Earth's climate through their effects on the radiation budget and the cycling of water between the atmosphere and Earth's surface. Limitations in our understanding of the global distribution and ...

D. M. Winker; J. Pelon; J. A. Coakley Jr.; S. A. Ackerman; R. J. Charlson; P. R. Colarco; P. Flamant; Q. Fu; R. M. Hoff; C. Kittaka; T. L. Kubar; H. Le Treut; M. P. McCormick; G. Mégie; L. Poole; K. Powell; C. Trepte; M. A. Vaughan; B. A. Wielicki

2010-09-01T23:59:59.000Z

165

The Signature of ENSO in Global Temperature and Precipitation Fields Derived from the Microwave Sounding Unit  

Science Conference Proceedings (OSTI)

Global temperature anomalies associated with ENSO are investigated, making use of a 13-year record of gridded temperature and precipitation data from the microwave sounding unit (MSU). The warm phase of the ENSO cycle during this period was ...

Elena Yulaeva; John M. Wallace

1994-11-01T23:59:59.000Z

166

Regional business cycles in Italy  

Science Conference Proceedings (OSTI)

There is clear evidence for differences in the structure of the Italian regional business cycle in the period 1951-2004: the relationship with the national business cycle is closer in the North than in the South. The interaction between regional cycles ... Keywords: Regional business cycles, Spectral analysis, Stylized facts

Camilla Mastromarco; Ulrich Woitek

2007-10-01T23:59:59.000Z

167

Global climate change: Implications, challenges and mitigation measures  

SciTech Connect

The present volume discusses topics in the fields of natural climatic fluctuations, the greenhouse effect, climate modeling, the biophysical and socioeconomic impacts of climate change, climate-change effect mitigation and adaptation strategies, and domestic (US) and international perspectives on regulation of climate-affecting activities. Attention is given to past climates as a guide to the future, the certainty of contemporary global warming, the physics of the greenhouse effect, the global carbon cycle, general circulation model studies of global warming, the implications of sea-level rise, forests' role in global climate change, the ecological effects of rapid climate change, predicted effects of climate change on agriculture, the impact of global warming on human health, energy supply technologies for reducing greenhouse gas emissions, and the U.N.'s 1992 Earth Summit Conference.

Majumdar, S.K.; Kalkstein, L.S.; Yarnal, B.M.; Miller, E.W.; Rosenfeld, L.M.

1992-01-01T23:59:59.000Z

168

Global Renewable Power International Global RPI | Open Energy...  

Open Energy Info (EERE)

RPI) Place Spain Sector Wind energy Product Spain-based developer of wind projects in Poland, Croatia and Chile. References Global Renewable Power International (Global RPI)1...

169

Regional and Global Data  

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

Products > Regional/Global Products > Regional/Global Regional and Global Data Biogeochemical Dynamics Data Regional and global biogeochemical dynamics data can be used to improve our understanding of the structure and function of various ecosystems; to enable prediction across spatial and temporal scales; and to parameterize and validate terrestrial ecosystem models. The ORNL DAAC compiles, archives, and distributes more than 150 products from the following projects: Climate Collections Hydroclimatology Collections ISLSCP II Project Net Primary Productivity (NPP) River Discharge (RIVDIS) Russian Land Cover (RLC) Soil Collections Vegetation Collections Vegetation-Ecosystem Modeling (VEMAP) Climate Collections Climate collections include measured and modeled values for variables such as temperature, precipitation, humidity, radiation, wind velocity, and

170

Pax Global, Inc.,  

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

Pax Global, Inc., Pax Global, Inc., (freezers) Issued: April 2, 2013 BEFORE THE U.S. DEPARTMENT OF ENERGY Washington, D.C. 20585 ) ) ) ) ) Case Number: 2013-SE-L413 NOTICE OF NONCOMPLIANCE DETERMINATION Manufacturers and private labelers are prohibited from distributing covered products in the United States that do not comply with applicable federal energy conservation standards. 10 C.F.R. § 429.102; 42 U.S.C. § 6302. Pax Global, Inc. ("Pax Global") is a private labeler and uses the "Crosley" and "Daewoo" brands to distribute freezers in the United States. TESTING l. The U.S. Department of Energy ("DOE") tested four privately labeled units o basic model numbe , manufactured , 1 that had been distributed in the United States by a third-pa1iy private labeler.

171

The Global Grid  

E-Print Network (OSTI)

This paper puts forward the vision that a natural future stage of the electricity network could be a grid spanning the whole planet and connecting most of the large power plants in the world: this is the "Global Grid". The main driving force behind the Global Grid will be the harvesting of remote renewable sources, and its key infrastructure element will be the high capacity long transmission lines. Wind farms and solar power plants will supply load centers with green power over long distances. This paper focusses on the introduction of the concept, showing that a globally interconnected network can be technologically feasible and economically competitive. We further highlight the multiple opportunities emerging from a global electricity network such as smoothing the renewable energy supply and electricity demand, reducing the need for bulk storage, and reducing the volatility of the energy prices. We also discuss possible investment mechanisms and operating schemes. Among others, we envision in such a system...

Chatzivasileiadis, Spyros; Andersson, Göran

2012-01-01T23:59:59.000Z

172

KRFTWRK – Global Human Electricity  

E-Print Network (OSTI)

Power Network 2.1.1 Virtual Power Plants The Global Powernetwork, based on "Virtual Power Plants", called "VPP". A "participant runs a virtual human power plant. Per every "

Prohaska, Rainer

2009-01-01T23:59:59.000Z

173

Global Ocean Meridional Overturning  

Science Conference Proceedings (OSTI)

A decade-mean global ocean circulation is estimated using inverse techniques, incorporating air–sea fluxes of heat and freshwater, recent hydrographic sections, and direct current measurements. This information is used to determine mass, heat, ...

Rick Lumpkin; Kevin Speer

2007-10-01T23:59:59.000Z

174

Global Warming, Soot, Ice  

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

Global Warming, Soot, Ice Speaker(s): James Hansen Date: November 7, 2003 - 12:00pm Location: 90-3122 Irreversible "dangerous anthropogenic interference" with the climate system...

175

Earth's Global Energy Budget  

Science Conference Proceedings (OSTI)

An update is provided on the Earth's global annual mean energy budget in the light of new observations and analyses. In 1997, Kiehl and Trenberth provided a review of past estimates and performed a number of radiative computations to better ...

Kevin E. Trenberth; John T. Fasullo; Jeffrey Kiehl

2009-03-01T23:59:59.000Z

176

Global Climate Change  

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

When President Bush announced his Global Climate Change Initiative in February 2002, he committed the United States to a new strategy to cut greenhouse gas emissions over the next...

177

China's Global Oil Strategy  

E-Print Network (OSTI)

21, 2008. Ying, Wang. “ China, Venezuela firms to co-developoilfields. ” China Daily (27 August 2005) http://David and Bi Jianhai. “China’s Global Hunt for Energy. ”

Thomas, Bryan G

2009-01-01T23:59:59.000Z

179

China's Global Oil Strategy  

E-Print Network (OSTI)

nations began to seek out oil reserves around the world. 3on the limited global oil reserves and spiking prices. Manyto the largest proven oil reserves, making up 61 percent of

Thomas, Bryan G

2009-01-01T23:59:59.000Z

180

Global Nuclear Energy Partnership Fact Sheet - Demonstrate More  

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

Global Nuclear Energy Partnership Fact Sheet - Demonstrate More Global Nuclear Energy Partnership Fact Sheet - Demonstrate More Proliferation-Resistant Recycling Global Nuclear Energy Partnership Fact Sheet - Demonstrate More Proliferation-Resistant Recycling Under GNEP, the U.S. will work with GNEP partners to demonstrate the capability to safely recycle used nuclear fuel using more proliferation resistant separation processes. In support of this effort, the U.S and its international partners would conduct an Engineering-Scale Demonstration (ESD) of a process that would separate the usable components in used commercial fuel from its waste components, without separating pure plutonium. An Advanced Fuel Cycle Facility (AFCF) would be a multi-purpose research and development laboratory that can serve fuel cycle testing needs

Note: This page contains sample records for the topic "vast global cycle" 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

Integrated Global Nuclear Materials Management - Preliminary Concepts -  

SciTech Connect

Approach to Connect Global Objectives and Local Actions: (1) Articulate global objectives into a hierarchy of subsystem requirements and local attributes and measures; (2) Establish a baseline system and viable alternatives through the interactions and relationships (e.g., networks) of local system elements and their options; (3) Evaluate performance of system alternatives and develop improved nuclear material management strategies and technologies; and (4) The need to address greatest concerns first (prioritized or graded approach) and to make tradeoffs among implementation options and competing objectives entails a risk-based approach. IGNMM could provide a systematic understanding of global nuclear materials management and evolutionarily improve and integrate the management through an active architecture, using for example, situation awareness, system models, methods, technologies, and international cooperation. Different tools would be used within the overall framework to address individual issues on the desired geographic scale that could be easily linked to broader analyses. Life-cycle system analyses would allow for evaluating material path alternatives on an integrated global scale. Disconnects, overlaps, technical options, and alternatives for optimizing nuclear materials processes could be evaluated in an integrated manner.

Dreicer, M; Jones, E; Richardson, J

2006-07-13T23:59:59.000Z

182

Fuel Cycle Subcommittee  

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

Report to NEAC Report to NEAC Fuel Cycle Subcommittee Meeting of April 23, 2013 Washington D.C. June 13, 2013 Burton Richter (Chair), Margaret Chu, Darleane Hoffman, Raymond Juzaitis, Sekazi K Mtingwa, Ronald P Omberg, Joy L Rempe, Dominique Warin 2 I Introduction and Summary The Fuel Cycle Subcommittee of NEAC met in Washington on April 23, 2013. The meeting focused on issues relating to the NE advanced reactor program (sections II, III, and IV), and on storage and transportation issues (section V) related to a possible interim storage program that is the first step in moving toward a new permanent repository as recommended by the Blue Ribbon Commission (BRC) and discussed in the recent response by DOE to Congress on the BRC report 1 . The agenda is given in

183

Stirling cycle engine  

DOE Patents (OSTI)

In a Stirling cycle engine having a plurality of working gas charges separated by pistons reciprocating in cylinders, the total gas content is minimized and the mean pressure equalization among the serial cylinders is improved by using two piston rings axially spaced at least as much as the piston stroke and by providing a duct in the cylinder wall opening in the space between the two piston rings and leading to a source of minimum or maximum working gas pressure.

Lundholm, Gunnar (Lund, SE)

1983-01-01T23:59:59.000Z

184

The Energy Strategy Cycle  

E-Print Network (OSTI)

Effective long-range energy planning begins with a reflective analysis that encompasses the complexity of today's energy reality and sets a course for activity to achieve long-range continuing advancement. This strategy approach involves an interrelated 'cycle' that once started and controlled in the proper direction is almost self-building in improvement. Energy conservation is the driving force to create additive progress involving system flexibility, process integration, and less energy dependence.

Korich, R. D.

1983-01-01T23:59:59.000Z

185

USCEA fuel cycle '93  

SciTech Connect

The US Council for Energy Awareness sponsored the Fuel Cycle '93 conference in Dallas, Texas, on March 21-24, 1993. Over 250 participants attended, numerous papers were presented, and several panel discussions were held. The focus of most industry participants remains the formation of USEC and the pending US-Russian HEU agreement. Following are brief summaries of two key papers and the Fuel Market Issues panel discussion.

Not Available

1993-04-01T23:59:59.000Z

186

The DOE water cycle pilot study.  

SciTech Connect

In 1999, the U.S. Global Change Research Program (USGCRP) formed a Water Cycle Study Group (Hornberger et al. 2001) to organize research efforts in regional hydrologic variability, the extent to which this variability is caused by human activity, and the influence of ecosystems. The USGCRP Water Cycle Study Group was followed by a U.S. Department of Energy (DOE) Water Cycle Research Plan (Department of Energy 2002) that outlined an approach toward improving seasonal-to-interannual hydroclimate predictability and closing a regional water budget. The DOE Water Cycle Research Plan identified key research areas, including a comprehensive long-term observational database to support model development, and to develop a better understanding of the relationship between the components of local water budgets and large scale processes. In response to this plan, a multilaboratory DOE Water Cycle Pilot Study (WCPS) demonstration project began with a focus on studying the water budget and its variability at multiple spatial scales. Previous studies have highlighted the need for continued efforts to observationally close a local water budget, develop a numerical model closure scheme, and further quantify the scales in which predictive accuracy are optimal. A concerted effort within the National Oceanic and Atmospheric Administration (NOAA)-funded Global Energy and Water Cycle Experiment (GEWEX) Continental-scale International Project (GCIP) put forth a strategy to understand various hydrometeorological processes and phenomena with an aim toward closing the water and energy budgets of regional watersheds (Lawford 1999, 2001). The GCIP focus on such regional budgets includes the measurement of all components and reduction of the error in the budgets to near zero. To approach this goal, quantification of the uncertainties in both measurements and modeling is required. Model uncertainties within regional climate models continue to be evaluated within the Program to Intercompare Regional Climate Simulations (Takle et al. 1999), and model uncertainties within land surface models are being evaluated within the Program to Intercompare Land Surface Schemes (e.g., Henderson-Sellers 1993; Wood et al. 1998; Lohmann et al. 1998). In the context of understanding the water budget at watershed scales, the following two research questions that highlight DOE's unique water isotope analysis and high-performance modeling capabilities were posed as the foci of this pilot study: (1) Can the predictability of the regional water budget be improved using high-resolution model simulations that are constrained and validated with new hydrospheric water measurements? (2) Can water isotopic tracers be used to segregate different pathways through the water cycle and predict a change in regional climate patterns? To address these questions, numerical studies using regional atmospheric-land surface models and multiscale land surface hydrologic models were generated and, to the extent possible, the results were evaluated with observations. While the number of potential processes that may be important in the local water budget is large, several key processes were examined in detail. Most importantly, a concerted effort was made to understand water cycle processes and feedbacks at the land surface-atmosphere interface at spatial scales ranging from 30 m to hundreds of kilometers. A simple expression for the land surface water budget at the watershed scale is expressed as {Delta}S = P + G{sub in} - ET - Q - G{sub out}, where {Delta}S is the change in water storage, P is precipitation, ET is evapotranspiration, Q is streamflow, G{sub in} is groundwater entering the watershed, and G{sub out} is groundwater leaving the watershed, per unit time. The WCPS project identified data gaps and necessary model improvements that will lead to a more accurate representation of the terms in Eq. (1). Table 1 summarizes the components of this water cycle pilot study and the respective participants. The following section provides a description of the surface observation and modeling sit

Miller, N. L.; King, A. W.; Miller, M. A.; Springer, E. P.; Wesely, M. L.; Bashford, K. E.; Conrad, M. E.; Costigan, K.; Foster, P. N.; Gibbs, H. K.; Jin, J.; Klazura, J.; Lesht, B. M.; Machavaram, M. V.; Pan, F.; Song, J.; Troyan, D.; Washngton-Allen, R. A.; Environmental Research; LBNL; ORNL; BNL; LANL

2005-03-01T23:59:59.000Z

187

NETL: Global Environmental Benefits  

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

Global Environmental Benefits Global Environmental Benefits Gasification Systems Global Environmental Benefits Environmental performance for future energy production systems is a much greater factor as emission standards tighten in the United States and worldwide. The outstanding environmental performance of gasification systems makes it an excellent technology for the clean production of electricity and other products. In addition, the reduction of CO2 emissions is one of the major challenges facing industry in response to global climate change. Other countries with coal reserves might potentially import technologies developed in the United States to enable low-cost gasification with carbon capture and EOR or sequestration. Not only will this benefit the U.S. gasification technology industry, but it will also result in a global environmental benefit through more affordable control of greenhouse gases (GHGs). See the U.S. Environmental Protection Agency (EPA) link below for a summary of the impact of fossil fuels without carbon capture on CO2 emissions, on the GHG contributions of different countries, and of the projected impact of developing countries to 2030:

188

Latin America, State Power, and the Challenge to Global Capital  

E-Print Network (OSTI)

selling increasing quantities of oil to China. Here we canexporting vast quantities of soy, copper, oil and so on to

Robinson, William I.

2006-01-01T23:59:59.000Z

189

global | OpenEI  

Open Energy Info (EERE)

global global Dataset Summary Description GIS data for offshore wind speed (meters/second). Specified to Exclusive Economic Zones (EEZ).Wind resource based on NOAA blended sea winds and monthly wind speed at 30km resolution, using a 0.11 wind sheer to extrapolate 10m - 90m. Annual average >= 10 months of data, no nulls. Source National Renewable Energy Laboratory (NREL) Date Released Unknown Date Updated Unknown Keywords GIS global NOAA NREL offshore wind wind speed Data application/zip icon Download Shapefile (zip, 18.5 MiB) Quality Metrics Level of Review Some Review Comment Temporal and Spatial Coverage Frequency Time Period License License Other or unspecified, see optional comment below Comment Please cite NREL and NOAA Rate this dataset Usefulness of the metadata

190

Global ice sheet modeling  

Science Conference Proceedings (OSTI)

The University of Maine conducted this study for Pacific Northwest Laboratory (PNL) as part of a global climate modeling task for site characterization of the potential nuclear waste respository site at Yucca Mountain, NV. The purpose of the study was to develop a global ice sheet dynamics model that will forecast the three-dimensional configuration of global ice sheets for specific climate change scenarios. The objective of the third (final) year of the work was to produce ice sheet data for glaciation scenarios covering the next 100,000 years. This was accomplished using both the map-plane and flowband solutions of our time-dependent, finite-element gridpoint model. The theory and equations used to develop the ice sheet models are presented. Three future scenarios were simulated by the model and results are discussed.

Hughes, T.J.; Fastook, J.L. [Univ. of Maine, Orono, ME (United States). Institute for Quaternary Studies

1994-05-01T23:59:59.000Z

191

Dynamic Mercury Cycling Model Upgrade  

Science Conference Proceedings (OSTI)

This technical update describes the status of activities to upgrade the Dynamic Mercury Cycling Model (D-MCM), an EPRI simulation model that predicts mercury cycling and bioaccumulation in lakes.

2008-12-17T23:59:59.000Z

192

Principal Associate Director - Global Security  

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

Principal Associate Director - Global Security Principal Associate Director - Global Security As Principal Associate Director for Global Security, Wallace leads Laboratory programs with special focus on developing and applying the scientific and engineering capabilities to address complex national and global security threats. Contact Operator Los Alamos National Laboratory (505 667-5061 Wallace's expertise is forensic seismology, a highly specialized discipline focusing on detection and quantification of nuclear tests. Terry C. Wallace, Jr. Principal Associate Director for Global Security Terry C. Wallace, Jr., Principal Associate Director for Global Security As Principal Associate Director for Global Security, Wallace leads Laboratory programs with a focus on applying scientific and engineering capabilities

193

Global Hunger Index  

E-Print Network (OSTI)

of halving the proportion of hungry people between 1990 and 2015, we are nowhere near meeting that target. The percentage of undernourished people fell from 20 percent in 1990–92 to 16 percent in 2004–06. In recent years, however, the number of hungry people has actually been increasing. In 2009, on the heels of a global food price

Heidi Fritschel; Yisehac Yohannes

2010-01-01T23:59:59.000Z

194

Global terrestrial biogeochemistry: Perturbations, interactions, and time scales  

Science Conference Proceedings (OSTI)

Global biogeochemical processes are being perturbed by human activity, principally that which is associated with industrial activity and expansion of urban and agricultural complexes. Perturbations have manifested themselves at least since the beginning of the 19th Century, and include emissions of CO{sub 2} and other pollutants from fossil fuel combustion, agricultural emissions of reactive nitrogen, and direct disruption of ecosystem function through land conversion. These perturbations yield local impacts, but there are also global consequences that are the sum of local-scale influences. Several approaches to understanding the global-scale implications of chemical perturbations to the Earth system are discussed. The lifetime of anthropogenic CO{sub 2} in the atmosphere is an important concept for understanding the current and future commitment to an altered atmospheric heat budget. The importance of the terrestrial biogeochemistry relative to the lifetime of excess CO{sub 2} is demonstrated using dynamic, aggregated models of the global carbon cycle.

Braswell, B.H. Jr.

1996-12-01T23:59:59.000Z

195

Optimum cycle parameters of coal fired closed cycle gas turbine in regenerative and combined cycle configurations  

Science Conference Proceedings (OSTI)

This paper presents the methodology developed for the estimation of thermodynamic performance and reports the optimum cycle parameters of coal fired CCGT in regenerative and combined cycle configurations using air, helium and carbon dioxide as working gases. A rigorous approach has been followed for the determination of the cycle efficiency by assuming the specific heat of working gases as a continuous function of temperature for accurate estimation of cycle parameters. 14 refs.

Rao, J.S.

1982-01-01T23:59:59.000Z

196

Consequences of Considering Carbon–Nitrogen Interactions on the Feedbacks between Climate and the Terrestrial Carbon Cycle  

Science Conference Proceedings (OSTI)

The impact of carbon–nitrogen dynamics in terrestrial ecosystems on the interaction between the carbon cycle and climate is studied using an earth system model of intermediate complexity, the MIT Integrated Global Systems Model (IGSM). Numerical ...

Andrei P. Sokolov; David W. Kicklighter; Jerry M. Melillo; Benjamin S. Felzer; C. Adam Schlosser; Timothy W. Cronin

2008-08-01T23:59:59.000Z

197

ENSO Warm (El Niño) and Cold (La Niña) Event Life Cycles: Ocean Surface Anomaly Patterns, Their Symmetries, Asymmetries, and Implications  

Science Conference Proceedings (OSTI)

Previous studies by the authors have described the composite global marine surface anomalies of ENSO warm (El Niño) events and cold (La Niña) events. Here the similarities and differences in these life cycles are examined. Qualitatively different ...

Narasimhan K. Larkin; D. E. Harrison

2002-05-01T23:59:59.000Z

198

Joint Variability of Global Runoff and Global Sea Surface Temperatures  

Science Conference Proceedings (OSTI)

Global land surface runoff and sea surface temperatures (SST) are analyzed to identify the primary modes of variability of these hydroclimatic data for the period 1905–2002. A monthly water-balance model first is used with global monthly ...

Gregory J. McCabe; David M. Wolock

2008-08-01T23:59:59.000Z

199

POSSIBLE SOLAR CYCLE VARIATIONS IN THE CONVECTION ZONE  

E-Print Network (OSTI)

Abstract. Using data from the Global Oscillations Network Group (GONG) that covers the period from 1995 to 1998 we study the change in frequencies of solar oscillations with solar activity. From these frequencies we attempt to determine any possible variation in solar structure with solar activity. We do not find any evidence of a change in the convection zone depth or extent of overshoot below the convection zone during the solar cycle.

Sarbani Basu; H. M. Antia

2008-01-01T23:59:59.000Z

200

The Kalina cycle and similar cycles for geothermal power production  

SciTech Connect

This report contains a brief discussion of the mechanics of the Kalina cycle and ideas to extend the concept to other somewhat different cycles. A modified cycle which has a potential heat rejection advantage but little or no performance improvement is discussed. Then, the results of the application of the Kalina cycle and the modified cycle to a geothermal application (360/degree/F resource) are discussed. The results are compared with published results for the Kalina cycle with high temperature sources and estimates about performance at the geothermal temperatures. Finally, the conclusions of this scoping work are given along with recommendations of the direction of future work in this area. 11 refs., 4 figs., 1 tab.

Bliem, C.J.

1988-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "vast global cycle" 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

Nutrient Cycling Study  

DOE Green Energy (OSTI)

The particular goal of this study is to develop measurement techniques for understanding how consortia of organisms from geothermal facilities utilize sulfur and iron for metabolic activity; and in turn, what role that activity plays in initiating or promoting the development of a biofilm on plant substrates. Sulfur cycling is of interest because sulfur is produced in the resource. Iron is found in some of the steel formulations used in plant components and is also added as chemical treatment for reducing sulfide emissions from the plants. This report describes the set-up and operation of a bioreactor for evaluating the response of colonies of geothermal organisms to changes in nutrient and environmental conditions. Data from initial experiments are presented and plans for future testing is discussed.

Peter A. Pryfogle

2005-09-01T23:59:59.000Z

202

Direct fired power cycle  

SciTech Connect

A method for implementing a thermodynamic cycle is described comprising the steps of: expanding a gaseous working stream to transform its energy into usable form; removing from the expanded gaseous working stream a withdrawal stream; combining the withdrawal stream with a lean stream, having a higher content of a higher-boiling component than is contained in the withdrawal stream, to form a composite stream; condensing the composite stream to provide heat; separating the composite stream to form a liquid stream; forming an oncoming liquid working stream that evaporates at a temperature lower than the temperature at which the composite stream condenses; and evaporating the oncoming liquid working stream, using the heat produced by condensing the composite stream, to form the gaseous working stream.

Kalina, A.I.

1988-03-22T23:59:59.000Z

203

Global Climate Data  

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

Data Data The climate data at the ORNL DAAC are used primarily as driving variables in terrestrial biogeochemistry models. These models typically use data on temperature (min,max), precipitation, humidity (relative humidity, vapor pressure deficit, dew point), radiation (PFD in PAR, shortwave, direct/diffuse, and UV radiation, daylength), and wind velocity. Climate / meteorology data are required at hourly to monthly time scales, either point or gridded, at spatial scales ranging from regional to continental to global. The ORNL DAAC currently distributes climate data from several related projects: VEMAP-1 Hydroclimatology, and Global Historical Climatology Network. We are also now distributing climate data developed at the East Anglia Climate Research Unit and the Potsdam Institute for Climate Research.

204

Global Insight Energy Group  

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

Outlook Outlook Mary Novak Managing Director IHS Global Insight Copyright © 2010 IHS Global Insight, Inc. Overview: Energy Sector Transformation Underway * The recession has hit energy demand hard, and aggregate energy demand is not expected to return to 2007 levels until 2018. * Oil and natural gas prices will both rise over the long-term, but the price trends will diverge with natural gas prices rising slowly due to the development of shale gas. * This forecast does not include a GHG cap-and-trade program. However, it is assumed that there will be continued improvement in equipment, appliance and building efficiencies that will reduce carbon emissions relative to past projections. * The forecast also includes the more than 30 state- level programs to increase efficiency and reduce

205

Global Climate & Energy ProjectGlobal & Energy Project STANFORD UNIVERSITY  

E-Print Network (OSTI)

from plants and animals to energy, and to determine the best conditions for doing so (see below). #12, and processes may have an enormous impact on the world's future energy consumption and environment. In orderGlobal Climate & Energy ProjectGlobal & Energy Project STANFORD UNIVERSITY Global Energy Climate

Nur, Amos

206

Evaluation of Biases in JRA-25/JCDAS Precipitation and Their Impact on the Global Terrestrial Carbon Balance  

Science Conference Proceedings (OSTI)

This study evaluates a modeled precipitation field and examines how its bias affects the modeling of the regional and global terrestrial carbon cycle. Spatial and temporal variations in precipitation produced by the Japanese 25-yr reanalysis (JRA-...

Makoto Saito; Akihiko Ito; Shamil Maksyutov

2011-08-01T23:59:59.000Z

207

Orogenic Propagating Precipitation Systems over the United States in a Global Climate Model with Embedded Explicit Convection  

Science Conference Proceedings (OSTI)

In the lee of major mountain chains worldwide, diurnal physics of organized propagating convection project onto seasonal and climate time scales of the hydrologic cycle, but this phenomenon is not represented in conventional global climate models (...

Michael S. Pritchard; Mitchell W. Moncrieff; Richard C. J. Somerville

2011-08-01T23:59:59.000Z

208

A New Absorption Cycle: The Single-Effect Regenerative Absoprtion Refrigeration Cycle  

E-Print Network (OSTI)

REGENERATIVE ABSORPTION REFRIGERATION CYCLE ABSTRACT A new absorption cycle , using heat as the energy

Dao, K.

2011-01-01T23:59:59.000Z

209

Global climate feedbacks  

SciTech Connect

The important physical, chemical, and biological events that affect global climate change occur on a mesoscale -- requiring high spatial resolution for their analysis. The Department of Energy has formulated two major initiatives under the US Global Change Program: ARM (Atmospheric Radiation Measurements), and CHAMMP (Computer Hardware Advanced Mathematics and Model Physics). ARM is designed to use ground and air-craft based observations to document profiles of atmospheric composition, clouds, and radiative fluxes. With research and models of important physical processes, ARM will delineate the relationships between trace gases, aerosol and cloud structure, and radiative transfer in the atmosphere, and will improve the parameterization of global circulation models. The present GCMs do not model important feedbacks, including those from clouds, oceans, and land processes. The purpose of this workshop is to identify such potential feedbacks, to evaluate the uncertainties in the feedback processes (and, if possible, to parameterize the feedback processes so that they can be treated in a GCM), and to recommend research programs that will reduce the uncertainties in important feedback processes. Individual reports are processed separately for the data bases.

Manowitz, B.

1990-10-01T23:59:59.000Z

210

Global residential appliance standards  

SciTech Connect

In most countries, residential electricity consumption typically ranges from 20% to 40% of total electricity consumption. This energy is used for heating, cooling, refrigeration and other end-uses. Significant energy savings are possible if new appliance purchases are for models with higher efficiency than that of existing models. There are several ways to ensure or encourage such an outcome, for example, appliance rebates, innovative procurement, and minimum efficiency standards. This paper focuses on the latter approach. At the present time, the US is the only country with comprehensive appliance energy efficiency standards. However, many other countries, such as Australia, Canada, the European Community (EC), Japan and Korea, are considering enacting standards. The greatest potential impact of minimum efficiency standards for appliances is in the developing countries (e.g., China and India), where saturations of household appliances are relatively low but growing rapidly. This paper discusses the potential savings that could be achieved from global appliance efficiency standards for refrigerators and freezers. It also could be achieved from global appliance efficiency standards for refrigerators and freezers. It also discusses the impediments to establishing common standards for certain appliance types, such as differing test procedures, characteristics, and fuel prices. A methodology for establishing global efficiency standards for refrigerators and freezers is described.

Turiel, I.; McMahon, J.E. [Lawrence Berkeley Lab., CA (US); Lebot, B. [Agence Francaise pour la Maitrise de l`Energie, Valbonne (FR)

1993-03-01T23:59:59.000Z

211

Life Cycle Analysis: Power Studies Compilation Report  

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

Hour LC Life Cycle LCA Life Cycle Analysis LCC Life Cycle Costing LCI Life Cycle Inventory LCOE Levelized Cost of Delivered Electricity LNB Low NO x Burner LNG Liquefied...

212

Butterfly Diagram and Activity Cycles in HR 1099  

E-Print Network (OSTI)

We analyze photometric data of the active RS CVn--type star HR 1099 for the years 1975--2006 with an inversion technique and reveal the nature of two activity cycles of 15--16 yr and 5.3$\\pm$0.1 yr duration. The 16 yr cycle is related to variations of the total spot area and is coupled with the differential rotation, while the 5.3 yr cycle is caused by the symmetric redistribution of the spotted area between the opposite stellar hemispheres (flip-flop cycle). We recover long-lived active regions comprising two active longitudes that migrate in the orbital reference frame with a variable rate because of the differential rotation along with changes in the mean spot latitudes. The migration pattern is periodic with the 16 yr cycle. Combining the longitudinal migration of the active regions with a previously measured differential rotation law, we recover the first stellar butterfly diagram without an assumption about spot shapes. We find that mean latitudes of active regions at opposite longitudes change antisymmetrically in the course of the 16 yr cycle: while one active region migrates to the pole, the other approaches the equator. This suggests a precession of the global magnetic field with respect to the stellar rotational axis.

S. V. Berdyugina; G. W. Henry

2007-03-20T23:59:59.000Z

213

Terrestrial carbon cycle dynamics under recent and future climate change  

E-Print Network (OSTI)

The behavior of the terrestrial carbon cycle under historical and future climate change is examined using the University of Victoria Earth System Climate Model, now coupled to a dynamic terrestrial vegetation and global carbon cycle model. When forced by historical emissions of CO 2 from fossil fuels and land-use change, the coupled climate–carbon cycle model accurately reproduces historical atmospheric CO 2 trends, as well as terrestrial and oceanic uptake for the past two decades. Under six twenty-first-century CO 2 emissions scenarios, both terrestrial and oceanic carbon sinks continue to increase, though terrestrial uptake slows in the latter half of the century. Climate–carbon cycle feedbacks are isolated by comparing a coupled model run with a run where climate and the carbon cycle are uncoupled. The modeled positive feedback between the carbon cycle and climate is found to be relatively small, resulting in an increase in simulated CO 2 of 60 ppmv at the year 2100. Including non-CO 2 greenhouse gas forcing and increasing the model’s climate sensitivity increase the effect of this feedback to 140 ppmv. The UVic model does not, however, simulate a switch from a terrestrial carbon sink to a source during the twenty-first century, as earlier studies have suggested. This can be explained by a lack of substantial reductions in simulated vegetation productivity due to climate changes. 1.

H. Damon Matthews; Andrew J. Weaver; Katrin; J. Meissner

2005-01-01T23:59:59.000Z

214

The world's offshore continental margins contain vast reserves of  

E-Print Network (OSTI)

- ural gas that is embedded in cold, near-seafloorstrata.Published esti- mates suggest that the energy rep- resented by gas hydrate may exceed the energy available from conventional fossil fuel by a fac energy planning. Groups in several nations are attemptingtoevaluatetheresource and to define seafloor

Texas at Austin, University of

215

Energy Department Expands Research into Methane Hydrates, a Vast...  

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

largest solar generation and thermal energy storage systems; the first new commercial nuclear power plant to be licensed and built in the U.S. in three decades; an electric...

216

Energy Department Expands Research into Methane Hydrates, a Vast...  

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

to safely and sustainably unlock the natural gas held within." Methane hydrates are ice-like structures with natural gas locked inside, which can be found both onshore and...

217

Multilingual WorldWideScience.org Launch Broadens Access to Global Science  

Office of Science (SC) Website

Multilingual Multilingual WorldWideScience.org Launch Broadens Access to Global Science News Featured Articles Science Headlines 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 Presentations & Testimony News Archives Contact Information Office of Science U.S. Department of Energy 1000 Independence Ave., SW Washington, DC 20585 P: (202) 586-5430 06.11.10 Multilingual WorldWideScience.org Launch Broadens Access to Global Science Print Text Size: A A A Subscribe FeedbackShare Page Washington, D.C. - Scientific language barriers were broken today in Helsinki with the launch of Multilingual WorldWideScience.org External link . While a large share of scientific literature is published in English, vast quantities of high-quality science are not, and the pace of non-English scientific publishing is increasing. WorldWideScience.org External link

218

GoGlobal Fall 2006  

E-Print Network (OSTI)

Policy and Social Welfare at the UCLA School of Public Affairs, and Visiting Professor of Global & International

2006-01-01T23:59:59.000Z

219

Advanced regenerative absorption refrigeration cycles  

DOE Patents (OSTI)

Multi-effect regenerative absorption cycles which provide a high coefficient of performance (COP) at relatively high input temperatures. An absorber-coupled double-effect regenerative cycle (ADR cycle) (10) is provided having a single-effect absorption cycle (SEA cycle) (11) as a topping subcycle and a single-effect regenerative absorption cycle (1R cycle) (12) as a bottoming subcycle. The SEA cycle (11) includes a boiler (13), a condenser (21), an expansion device (28), an evaporator (31), and an absorber (40), all operatively connected together. The 1R cycle (12) includes a multistage boiler (48), a multi-stage resorber (51), a multisection regenerator (49) and also uses the condenser (21), expansion device (28) and evaporator (31) of the SEA topping subcycle (11), all operatively connected together. External heat is applied to the SEA boiler (13) for operation up to about 500 degrees F., with most of the high pressure vapor going to the condenser (21) and evaporator (31) being generated by the regenerator (49). The substantially adiabatic and isothermal functioning of the SER subcycle (12) provides a high COP. For higher input temperatures of up to 700 degrees F., another SEA cycle (111) is used as a topping subcycle, with the absorber (140) of the topping subcycle being heat coupled to the boiler (13) of an ADR cycle (10). The 1R cycle (12) itself is an improvement in that all resorber stages (50b-f) have a portion of their output pumped to boiling conduits (71a-f) through the regenerator (49), which conduits are connected to and at the same pressure as the highest pressure stage (48a) of the 1R multistage boiler (48).

Dao, Kim (14 Nace Ave., Piedmont, CA 94611)

1990-01-01T23:59:59.000Z

220

Closed-cycle Retrofit Study  

Science Conference Proceedings (OSTI)

EPRI is investigating implications of a potential U.S. Environmental Protection Agency (EPA) Clean Water Act 316(b) rulemaking that would establish "Best Technology Available" (BTA) based on closed-cycle cooling retrofits for facilities with once-through cooling. This report focuses on estimated costs associated with closed-cycle cooling system retrofits that include: 1) capital costs, 2) energy required to operate the closed-cycle system, 3) heat rate penalty, and 4) extended downtime required to retrof...

2011-01-31T23:59:59.000Z

Note: This page contains sample records for the topic "vast global cycle" 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

Award Cycle at a Glance  

Science Conference Proceedings (OSTI)

Award Cycle at a Glance. 2013. Eligibility Certification February 19 (with a nomination to the Board of Examiners). April 2 (without a nomination). ...

2013-07-22T23:59:59.000Z

222

Multivariable cycle-to-cycle of an injection molding process  

E-Print Network (OSTI)

Cycle-to-Cycle (CtC) feedback control has been studied extensively with increasing demands on the precision and quality of manufactured parts. Single input-Single output has been studied as the basis of CtC feedback control. ...

Vanderpuije, Curtis N

2005-01-01T23:59:59.000Z

223

Comprehensive Technical Report, General Electric Direct-Air-Cycle Aircraft Nuclear Propulsion Program, Program Summary and References  

SciTech Connect

This is one of twenty-one volumes sumarizing the Aircraft Nuclear Propulsion Program of the General Electric Company. This volume discusses the background to the General Electric program, and summarizes the various direct-air-cycle nuclear test assemblies and power plants that were developed. Because of the requirements of high performance, low weight, and small size, vast improvements in existing technology were required to meet the flight objectives. The technological progress achieved during the program is also summarized. The last appendix contains a compilation of the abstracts, tables of contents, and reference lists of the other twenty volumes.

Thornton, G.; Rothstein, A.J.

1962-06-28T23:59:59.000Z

224

Global Fossil Fuel Carbon Emissions - Graphics  

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

Fossil-Fuel CO2 Emissions Global Graphics Global Fossil-Fuel Carbon Emissions - Graphics Carbon Emission Estimates image image Global Per Capita Carbon Emission Estimates...

225

Biomass Gasification Combined Cycle  

DOE Green Energy (OSTI)

Gasification combined cycle continues to represent an important defining technology area for the forest products industry. The ''Forest Products Gasification Initiative'', organized under the Industry's Agenda 2020 technology vision and supported by the DOE ''Industries of the Future'' program, is well positioned to guide these technologies to commercial success within a five-to ten-year timeframe given supportive federal budgets and public policy. Commercial success will result in significant environmental and renewable energy goals that are shared by the Industry and the Nation. The Battelle/FERCO LIVG technology, which is the technology of choice for the application reported here, remains of high interest due to characteristics that make it well suited for integration with the infrastructure of a pulp production facility. The capital cost, operating economics and long-term demonstration of this technology area key input to future economically sustainable projects and must be verified by the 200 BDT/day demonstration facility currently operating in Burlington, Vermont. The New Bern application that was the initial objective of this project is not currently economically viable and will not be implemented at this time due to several changes at and around the mill which have occurred since the inception of the project in 1995. The analysis shows that for this technology, and likely other gasification technologies as well, the first few installations will require unique circumstances, or supportive public policies, or both to attract host sites and investors.

Judith A. Kieffer

2000-07-01T23:59:59.000Z

226

The closed fuel cycle  

Science Conference Proceedings (OSTI)

Available in abstract form only. Full text of publication follows: The fast growth of the world's economy coupled with the need for optimizing use of natural resources, for energy security and for climate change mitigation make energy supply one of the 21. century most daring challenges. The high reliability and efficiency of nuclear energy, its competitiveness in an energy market undergoing a new oil shock are as many factors in favor of the 'renaissance' of this greenhouse gas free energy. Over 160,000 tHM of LWR1 and AGR2 Used Nuclear Fuel (UNF) have already been unloaded from the reactor cores corresponding to 7,000 tons discharged per year worldwide. By 2030, this amount could exceed 400,000 tHM and annual unloading 14,000 tHM/year. AREVA believes that closing the nuclear fuel cycle through the treatment and recycling of Used Nuclear Fuel sustains the worldwide nuclear power expansion. It is an economically sound and environmentally responsible choice, based on the preservation of natural resources through the recycling of used fuel. It furthermore provides a safe and secure management of wastes while significantly minimizing the burden left to future generations. (authors)

Froment, Antoine; Gillet, Philippe [AREVA NC (France)

2007-07-01T23:59:59.000Z

227

Arrhenius and global warming  

SciTech Connect

Although concern about global atmospheric warming has intensified in recent decades, research into the greenhouse effect actually began in the 19th century. Fourier and other scientists appreciated that without heat-absorbing gases in the atmosphere, the temperature on the ground would be considerably lower, making life as we know it impossible. In 1896, the Swedish scientist Svante Arrhenius was the first to make a quantitative link between changes in carbon dioxide concentration and climate. Publication of his paper was celebrated at a recent Swedish workshop. 13 refs., 1 fig.

Uppenbrink, J.

1996-05-24T23:59:59.000Z

228

Global Laser Enrichment  

E-Print Network (OSTI)

APPLICATION – PUBLIC RESPONSES GE-Hitachi Global Laser Enrichment LLC (GLE) hereby submits the additional information requested in the November 19, 2009 letter. Enclosure 1 of this letter contains the responses the questions. A separate letter has been submitted that contains a non-public version of these responses, which contains Export-Controlled and Security-Related Information. If there are any questions regarding this letter and its contents, please do not hesitate to contact myself, or Julie Olivier of my staff at 910-819-4799 or at Julie.Olivier@ge.com.

Uranium Enrichment Branch; Albert E. Kennedy; Albert E. Kennedy; Tammy Orr (gle

2009-01-01T23:59:59.000Z

229

Global Laser Enrichment  

E-Print Network (OSTI)

PUBLIC VERSION GE-Hitachi Global Laser Enrichment LLC (GLE) hereby submits revision 2 of the GLE License Application. Enclosure 1 contains revised Request for Additional Information responses. Enclosure 2 contains revised chapters 1, 2, 3, 5, 7, and 11 of the GLE License Application. Enclosure 3 contains the revised pubic version of the Decommissioning Funding Plan. Non-Public versions of the revised License Application and the Decommissioning Funding Plan have been prepared and will be submitted under separate enclosure. If there are any questions regarding this letter and its contents, please do not hesitate to contact me at 910-819-4799 or at

Julie Olivier; Brian Smith Chief; Uranium Enrichment Branch; Julie Olivier; Tim Johnson (nrc; Tammy Orr (gle; Lori Butler (geh; Jerry Head (geh; Patricia Campbell (geh; Bob Crate (gle; Ken Givens (gle; Tom Owens (gle

2010-01-01T23:59:59.000Z

230

The Global Energy Challenge  

DOE Green Energy (OSTI)

The expected doubling of global energy demand by 2050 challenges our traditional patterns of energy production, distribution and use. The continued use of fossil fuels raises concerns about supply, security, environment and climate. New routes are needed for the efficient conversion of energy from chemical fuel, sunlight, and heat to electricity or hydrogen as an energy carrier and finally to end uses like transportation, lighting, and heating. Opportunities for efficient new energy conversion routes based on nanoscale materials will be presented, with emphasis on the sustainable energy technologies they enable.

Crabtree, George (ANL)

2007-09-12T23:59:59.000Z

231

Study Climate and Global Change  

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

What We Study How We Study Prepare The Nation For Change Assess the U.S. Climate Make Our Science Accessible Link Climate Change & Health Provide Data and Tools Coordinate Internationally Study Climate and Global Change Print E-mail Deforestation What is global change? "Global change" refers to changes in the global environment that may alter the capacity of the Earth to sustain life. This includes alterations in: Climate Land productivity Oceans or other water resources Atmospheric chemistry Ecological systems Demographic and socioeconomic trends What is global change research? According to the Global Change Research Act of 1990, "Global change research" refers to the study, monitoring, assessment, prediction, and information management activities used to describe and understand the:

232

Global Scratch Upgrade in Progress  

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

Global Scratch Gets Global Scratch Gets an Upgrade Global Scratch Gets an Upgrade Improvements Will Include Higher Data Output Rates, Connection to PDSF October 29, 2013 The most used file system at the National Energy Research Scientific Computing Center (NERSC)-global scratch-just got an upgrade. As a result, some users may see their data output to global scratch reach up to 80 gigabytes per second. Although users will probably not see their 20-terabyte storage quotas increase, the upgrade ensures that global scratch remains flexible and paves the way for PDSF to eventually use the file system Because of the upgrade, users will also be able to better access their temporary data files or "scratch data" from any NERSC system, not just the one that generated it. Prior to the upgrade, Global scratch typically

233

Evaluating the Carbon Cycle of a Coupled Atmosphere-Biosphere Model  

SciTech Connect

We investigate how well a coupled biosphere-atmosphere model, CCM3-IBIS, can simulate the functioning of the terrestrial biosphere and the carbon cycling through it. The simulated climate is compared to observations, while the vegetation cover and the carbon cycle are compared to an offline version of the biosphere model IBIS forced with observed climatic variables. The simulated climate presents some local biases that strongly affect the vegetation (e.g., a misrepresentation of the African monsoon). Compared to the offline model, the coupled model simulates well the globally averaged carbon fluxes and vegetation pools. The zonal mean carbon fluxes and the zonal mean seasonal cycle are also well represented except between 0{sup o} and 20{sup o}N due to the misrepresentation of the African monsoon. These results suggest that, despite regional biases in climate and ecosystem simulations, this coupled atmosphere-biosphere model can be used to explore geographic and temporal variations in the global carbon cycle.

Delire, C; Foley, J A; Thompson, S

2002-08-21T23:59:59.000Z

234

Nuclear fuel cycle information workshop  

SciTech Connect

This overview of the nuclear fuel cycle is divided into three parts. First, is a brief discussion of the basic principles of how nuclear reactors work; second, is a look at the major types of nuclear reactors being used and world-wide nuclear capacity; and third, is an overview of the nuclear fuel cycle and the present industrial capability in the US.

1983-01-01T23:59:59.000Z

235

Reading Comprehension - The Water Cycle  

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

The Water Cycle The Water Cycle Evaporation, Condensation and Precipitation The _________ moon sun water clouds evaporates _________ fish oceans rain water from lakes and oceans. As the air rises, it cools. The water vapor condenses into tiny droplets of _________ evaporation clouds water sunshine . The droplets crowd together and form a _________ cloud lake storm precipitation . Wind blows the _________ rain sun droplet cloud towards the land. The tiny droplets join together and fall as precipitation to the _________ river lake ground cloud . The water soaks into the ground and collects in _________ rivers and lakes oceans and clouds jars and cups plants and animals . The _________ storm cycle river house that never ends has started again! A water cycle diagram. Use the diagram to identify the different parts of the water cycle:

236

CMVRTC: Heavy Truck Duty Cycle  

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

heavy truck duty cycle (HTDC) project heavy truck duty cycle (HTDC) project OVERVIEW The Heavy Truck Duty Cycle (HTDC) Project was initiated in 2004 and is sponsored by the US Department of Energy's (DOE's) Office of FreedomCar and Vehicle Technologies Program. ORNL designed the research program to generate real-world-based duty cycle data from trucks operating in long-haul operations and was designed to be conducted in three phases: identification of parameters to be collected, instrumentation and pilot testing, identification of a real-world fleet, design of the data collection suite and fleet instrumentation, and data collection, analysis, and development of a duty cycle generation tool (DCGT). ANL logo dana logo michelin logo Schrader logo This type of data will be useful for supporting energy efficiency

237

A Global Cloud Resolving Model Goals  

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

Cloud Resolving Model Cloud Resolving Model Goals Uniform global horizontal grid spacing of 4 km or better ("cloud permitting") 100 or more layers up to at least the stratopause Parameterizations of microphysics, turbulence (including small clouds), and radiation Execution speed of at least several simulated days per wall-clock day on immediately available systems Annual cycle simulation by end of 2011. Motivations Parameterizations are still problematic. There are no spectral gaps. The equations themselves change at high resolution. GCRMs will be used for NWP within 10 years. GCRMs will be used for climate time-slices shortly thereafter. It's going to take some time to learn how to do GCRMs well. Scaling Science Length, Spatial extent, #Atoms, Weak scaling Time scale

238

Global petrochemical industry experiencing cyclic downturn  

SciTech Connect

The current deterioration of the petrochemical industry-particularly in the U.S. and Western Europe-is a cause of great concern to operators and analysts alike. Although the rapidly developing Asian market will continue to be a major factor into the next century, the immediate global outlook is for a weak market. Chem Systems Inc., Tarrytown, N.Y., discussed these issues at its annual petrochemical conference, held Jan. 13-14 in Houston. One of the few optimistic predictions of the meetings gas that the harbingers of the next industry cycle already can be seen in the U.S. economic recovery, and slow-down in new project planning, and a reduction in fixed costs. The paper describes the US market; market structure; the trend toward capacity integration; product forecasts; factors affecting the prices of propylene, aromatics, and benzene; the Asian market (Japan, Korea, Taiwan, China, Asian countries); regional trade; and the European market.

1993-03-29T23:59:59.000Z

239

Global Energy Inc | Open Energy Information  

Open Energy Info (EERE)

Inc Inc Jump to: navigation, search Name Global Energy Inc Place Cincinnati, Ohio Zip 45202-4048 Sector Hydro, Hydrogen Product Gasification technology and engineering firm, with activities in hydrogen production and Integrated Gasification Combined Cycle (IGCC) facilities. Coordinates 39.106614°, -84.504552° 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":39.106614,"lon":-84.504552,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

240

BBSLA – Kazakhstan (032610) Kazakh (Global Version ...  

Science Conference Proceedings (OSTI)

BBSLA – Kazakhstan (032610) Kazakh (Global Version 031010) 1 BLACKBERRY SOLUTION ??????????? ???????? ????????????? ...

Note: This page contains sample records for the topic "vast global cycle" 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

BBSLA - Kazakhstan (032610) Russian (Global Version ...  

Science Conference Proceedings (OSTI)

BBSLA - Kazakhstan (032610) Russian (Global Version 031010) 1 ???????????? ?????????? ?? ????????????? ??????? ...

242

NETL: Methane Hydrates - Global Assessment of Methane Gas Hydrates  

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

Global Assessment of Methane Gas Hydrates Last Reviewed 12/18/2013 Global Assessment of Methane Gas Hydrates Last Reviewed 12/18/2013 DE-FE0003060 Goal The goal of this project is to develop a global assessment of methane gas hydrates that will facilitate informed decision-making regarding the potential development of gas hydrate resources between the scientific community and other stakeholders/decision makers. The Assessment will provide science-based information on the role of gas hydrates in natural climate change and the carbon cycle, their sensitivity to climate change, and the potential environmental and socio-economic impacts of hydrate production. Performers Stiftelsen GRID-Arendal, Arendal, Norway Funding Institutions United Nations Environment Programme (UNEP) Statoil Schlumberger United States Department of Energy (USDOE)

243

Global net primary production and heterotrophic respiration for 1987  

Science Conference Proceedings (OSTI)

An ecosystem process model, BIOME-BGC, was parameterized and used to simulate the actual net primary production and heterotrophic respiration using daily climatic data, land cover type, leaf area index gridded to 1{degree} latitude by 1{degree} longitude grid cells for the year 1987. Global net primary production was 52 Pg C. These estimates were validated directly by two different methods. First, the grid cells were aggregated and used as inputs to a 3D atmospheric transport model, to compare CO{sub 2} station data with predictions. We simulated the intra-annual variation of atmospheric CO{sub 2} well for the northern hemisphere, but not for the southern hemisphere. Second, we calculated the net {sup 13}C uptake of vegetation, which is a function of water use efficiency. The {sup 13}C/{sup 12}C ratios agreed with measured data, indicating a strong limitation of global primary processes by the hydrologic cycle, especially precipitation. These are different from other global carbon models as we can simulate the year-to-year variation of climate, including El Nino, on the global carbon cycle.

Hunt, R.E. Jr.; Piper, S.C.; Nemani, R. [Univ. of Montana, Missoula, MT (United States)]|[Scripps Institute of Oceanography, La Jolla, CA (United States)] [and others

1995-06-01T23:59:59.000Z

244

DOE-Sponsored Beaufort Sea Expedition Studies Methane's Role in Global  

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

DOE-Sponsored Beaufort Sea Expedition Studies Methane's Role in DOE-Sponsored Beaufort Sea Expedition Studies Methane's Role in Global Climate Cycle DOE-Sponsored Beaufort Sea Expedition Studies Methane's Role in Global Climate Cycle October 29, 2009 - 1:00pm Addthis Washington, D.C. -- Increased understanding of methane's role in the global climate cycle and the potential of methane hydrate as a future energy resource could result from a recent joint research expedition off the coast of northeastern Alaska involving the Office of Fossil Energy's National Energy Technology Laboratory (NETL). Link to the project web siteThe Beaufort Sea expedition, which included research partners from the U.S. Naval Research Laboratory and Royal Netherlands Institute for Sea Research, gathered a wealth of data to help understand "fluxes," or changes in the concentration of methane within and

245

DOE-Sponsored Beaufort Sea Expedition Studies Methane's Role in Global  

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

Beaufort Sea Expedition Studies Methane's Role in Beaufort Sea Expedition Studies Methane's Role in Global Climate Cycle DOE-Sponsored Beaufort Sea Expedition Studies Methane's Role in Global Climate Cycle October 29, 2009 - 1:00pm Addthis Washington, D.C. -- Increased understanding of methane's role in the global climate cycle and the potential of methane hydrate as a future energy resource could result from a recent joint research expedition off the coast of northeastern Alaska involving the Office of Fossil Energy's National Energy Technology Laboratory (NETL). Link to the project web siteThe Beaufort Sea expedition, which included research partners from the U.S. Naval Research Laboratory and Royal Netherlands Institute for Sea Research, gathered a wealth of data to help understand "fluxes," or changes in the concentration of methane within and

246

Limit Cycle and Conserved Dynamics  

E-Print Network (OSTI)

We demonstrate that a potential coexists with limit cycle. Here the potential determines the final distribution of population. Our demonstration consists of three steps: We first show the existence of limit from a typical physical sciences setting: the potential is a type of Mexican hat type, with the strength of a magnetic field scale with the strength the potential gradient near the limit cycle, and the friction goes to zero faster than the potential near the limit cycle. Hence the dynamics at the limit cycle is conserved. The diffusion matrix is nevertheless finite at the limit cycle. Secondly, we construct the potential in the dynamics with limit cycle in a typical dynamical systems setting. Thirdly, we argue that such a construction can be carried out in a more general situation based on a method discovered by one of us. This method of dealing with stochastic differential equation is in general different from both Ito and Stratonovich calculus. Our result may be useful in many related applications, such as in the discussion of metastability of limit cycle and in the construction of Hopfield potential in the neural network computation.

X. -M. Zhu; L. Yin; P. Ao

2004-12-21T23:59:59.000Z

247

Global Threat Reduction Initiative  

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

Nonproliferation Nonproliferation U.S. DEPARTMENT OF ENERGY 1 The Current Status of Gap and U.S.-Origin Nuclear Fuel Removals 2011 Jeff Galan, Deputy Project Manager U.S.-Origin Nuclear Remove Program National Nuclear Security Administration Global Threat Reduction Initiative Defense Nuclear Nonproliferation U.S. DEPARTMENT OF ENERGY 2 GTRI Mission and Goals GTRI is: A part of President Obama's comprehensive strategy to prevent nuclear terrorism; and The key organization responsible for implementing the U.S. HEU minimization policy. GTRI MISSION Reduce and protect vulnerable nuclear and radiological material located at civilian sites worldwide. DOE STRATEGIC GOAL 2.2 Prevent the acquisition of nuclear and radiological materials for use in weapons of mass destruction and other

248

Global emissions inventories  

SciTech Connect

Atmospheric chemistry determines the concentrations of most of the important greenhouse gases except for carbon dioxide. The rate of removal of the greenhouse gases from the atmosphere is also controlled by atmospheric chemistry. The indirect effects of chemical forcing resulting from the chemical interactions of other species can also affect the concentrations of radiatively important gases such as ozone. In order to establish the contribution of any possible climatic change attributable to individual greenhouse gases, spatially and temporally resolved estimates of their emissions need to be established. Unfortunately, for most of the radiatively important species the global magnitudes of their individual fluxes are not known to better than a factor of two and their spatial distributions are even more poorly characterized. Efforts to estimate future projections of potential impacts and to monitor international agreements will require continued research to narrow the uncertainties of magnitude and geographical distribution of emissions.

Dignon, J.

1995-07-01T23:59:59.000Z

249

Global Energy Management System  

E-Print Network (OSTI)

Exxon Mobil Corporation has undertaken voluntary actions to continuously improve energy efficiency in our operations for many years. From 1973 to 1999, we improved the energy efficiency of our refineries and chemical plants by over 35 percent - saving the cumulative equivalent of 1.8 billion barrels of oil and reducing carbon dioxide emissions by over 200 million tonnes. In 2000, we redoubled our efforts with deployment of our Global Energy Management System (GEMS), which utilizes international best practices and benchmarking to identify energy efficiencies at each of our refineries and chemical plants. Thus far, we have identified opportunities to improve the energy efficiency of these facilities by an additional 15 to 20 percent. At full implementation, savings are expected to total $500 million to $1 billion per year, with an associated reduction in carbon dioxide emissions of about 10 million tonnes per year - roughly equivalent to removing 1.5 million cars from the world's roads.

Eidt, B. D.

2005-01-01T23:59:59.000Z

250

Global Natural Gas Market Analysis  

Science Conference Proceedings (OSTI)

This report examines the characteristics of global gas markets. These markets have entered a period of supplier strength and high prices as global demand growth has outpaced supply growth. The report systematically evaluates developments in global liquefaction andfor the principal consuming nationsin domestic production, market growth, pipelines, and regasification. While containing a great deal of detail, the report probes myriad announcements of commercial activities to help interpret the evolving comp...

2008-02-12T23:59:59.000Z

251

The Global Hydrologic and Energy Cycles: Suggestions for Studies in the Pre-Global Energy and Water Cycle Experiment (GEWEX) Period  

Science Conference Proceedings (OSTI)

Given the importance of a quantitative understanding of the way in which water and energy are moved from place to place and from component to component of the earth's climate system, it is necessary to obtain reliable estimates of the hydrologic ...

J. L. Kinter; J. Shukla

1990-02-01T23:59:59.000Z

252

NIST Global Standards Information Staff  

Science Conference Proceedings (OSTI)

... Ileana Martinez. Global standards & trade, Europe, Americas, e-Accessibility, biofuels, accreditation. ileana.martinez@nist.gov 301-975-2766. ...

253

Machine Learning for Global Optimization  

E-Print Network (OSTI)

approach for global optimization in which machine learning is used to predict ..... In Figure 1 we show the level curves of the 2–dimensional Rastrigin function.

254

Global energy for the next millennium  

Science Conference Proceedings (OSTI)

Public demand for cleaner air; an ever-growing need for electricity; rising standards of living; convenience of use and reliability of supply--these are the global forces that are accelerating the demand for natural gas today, from Thailand to Brazil, and the gas industry worldwide is moving fast to meet this growing need. Changes--in the regulatory environment, physical infrastructure, and technology--are coming at an unprecedented rate. These changes in turn are exerting a strong influence on the structuring of new gas industries, and the restructuring of existing ones, around the world. The most dramatic increase in gas use, in recent years, was in the Asia-Pacific region and South America, but the expansion is virtually universal. The widespread availability of more efficient gas-fired, combined-cycle power plants are playing a major role in this expansion, but changing trends in demand, regulatory policy, infrastructure development, and technology all contribute to structural change in the industry. In the broadest sense, these are all global issues, transcending national and even regional boundaries. When one looks more closely at exactly how demand growth or regulatory change, for example, is acting as a catalyst for industry restructuring, one can still see significant regional and national differences. A brief overview of these trends is presented.

Jacobs, R.H. [Purvin and Gertz, Inc., Houston, TX (United States)

1997-05-01T23:59:59.000Z

255

CMVRTC: Medium Truck Duty Cycle  

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

medium truck duty cycle (MTdc) project medium truck duty cycle (MTdc) project OVERVIEW The Medium Truck Duty Cycle (MTDC) project involves efforts to collect, analyze and archive data related to medium-truck operations in real-world driving environments. Such data and information will be useful to support technology evaluation efforts and to provide a means of accounting for real-world driving performance within medium-class truck analyses. The project involves private industry partners from various truck vocations. The MTDC project is unique in that there currently does not exist a national database of characteristic duty cycles for medium trucks. This project involves the collection of data from multiple vocations (four vocations) and multiple vehicles within these vocations (three vehicles per

256

Minimize Boiler Short Cycling Losses  

SciTech Connect

This revised ITP tip sheet on minimizing boiler short cycling losses provides how-to advice for improving industrial steam systems using low-cost, proven practices and technologies.

2006-01-01T23:59:59.000Z

257

Alternative Cycles for Power Converters  

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

expansion in the high pressure turbine by passing it through an additional lead-to-steam heat exchanger (HX). This can be a complication relative to the superheated steam cycle....

258

Deoxygenation in Cycling Fossil Plants  

Science Conference Proceedings (OSTI)

Minimizing shutdown oxygen levels at a cycling fossil plant can reduce corrosion product transport to the boilers. In this study two forms of activated carbon were used to catalyze the oxygen/hydrazine reaction and minimize oxygen levels.

1992-05-01T23:59:59.000Z

259

Ammonium generation during SRAT cycle  

DOE Green Energy (OSTI)

During the IDMS noble-metal demonstration runs ammonium nitrate deposition was found in the vessel vent system of the feed preparation area. In the bench-scale experiments of studying the hydrogen generation during the sludge treatment cycle, ammonium ion production was also monitored. It was found that: During a simulation of the DWPF Cold Chemical Runs SRAT cycle no detectable amount of ammonium ions was generated when treating a non-noble-metal containing sludge simulant according to the nitric acid flowsheet. Ammonium ions were generated during the SRAT-SME cycle when treating the noble-metal containing sludge with either formic acid or nitric acid/late-washing PHA. This is due to the reaction between formic acid and nitrate catalyzed by the noble metals in the sludge simulant. Ammonium ion production closely followed the hydrogen evolution from the catalytic decomposition of formic acid. This report summarizes the results of the production of ammonia during the SRAT cycle.

Hsu, C.W.

1992-10-13T23:59:59.000Z

260

Global warming and global dioxide emission: An empirical study  

Science Conference Proceedings (OSTI)

In this paper, the dynamic relationship between global surface temperature (global warming) and global carbon dioxide emission (CO{sub 2}) is modelled and analyzed by causality and spectral analysis in the time domain and frequency domain, respectively. Historical data of global CO{sub 2} emission and global surface temperature anomalies over 129 years from 1860-1988 are used in this study. The causal relationship between the two phenomena is first examined using the Sim and Granger causality test in the time domain after the data series are filtered by ARIMA models. The Granger causal relationship is further scrutinized and confirmed by cross-spectral and multichannel spectral analysis in the frequency domain. The evidence found from both analyses proves that there is a positive causal relationship between the two variables. The time domain analysis suggests that Granger causality exists between global surface temperature and global CO{sub 2} emission. Further, CO{sub 2} emission causes the change in temperature. The conclusions are further confirmed by the frequency domain analysis, which indicates that the increase in CO{sub 2} emission causes climate warming because a high coherence exists between the two variables. Furthermore, it is proved that climate changes happen after an increase in CO{sub 2} emission, which confirms that the increase in CO{sub 2} emission does cause global warming. 27 refs., 10 figs., 5 tabs.

Linyan Sun [Xian Jiaotong Univ., Shaanxi (China); Wang, M. [Saint Mary`s Univ., Halifax, Nova Scotia (Canada)

1996-04-01T23:59:59.000Z

Note: This page contains sample records for the topic "vast global cycle" 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

Chinese demand drives global deforestation Chinese demand drives global deforestation  

E-Print Network (OSTI)

Chinese demand drives global deforestation Chinese demand drives global deforestation By Tansa Musa zones and do not respect size limits in their quest for maximum financial returns. "I lack words economy. China's demand for hardwood drives illegal logging says "Both illegal and authorized

262

Nonlinearity of Carbon Cycle Feedbacks  

Science Conference Proceedings (OSTI)

Coupled climate–carbon models have shown the potential for large feedbacks between climate change, atmospheric CO2 concentrations, and global carbon sinks. Standard metrics of this feedback assume that the response of land and ocean carbon uptake ...

Kirsten Zickfeld; Michael Eby; H. Damon Matthews; Andreas Schmittner; Andrew J. Weaver

2011-08-01T23:59:59.000Z

263

Microbial Carbon Cycling in Permafrost-Affected Soils  

Science Conference Proceedings (OSTI)

The Arctic plays a key role in Earth s climate system as global warming is predicted to be most pronounced at high latitudes and because one third of the global carbon pool is stored in ecosystems of the northern latitudes. In order to improve our understanding of the present and future carbon dynamics in climate sensitive permafrost ecosystems, present studies concentrate on investigations of microbial controls of greenhouse gas fluxes, on the activity and structure of the involved microbial communities, and on their response to changing environmental conditions. Permafrost-affected soils can function as both a source and a sink for carbon dioxide and methane. Under anaerobic conditions, caused by flooding of the active layer and the effect of backwater above the permafrost table, the mineralization of organic matter can only be realized stepwise by specialized microorganisms. Important intermediates of the organic matter decomposition are hydrogen, carbon dioxide and acetate, which can be further reduced to methane by methanogenic archaea. Evolution of methane fluxes across the subsurface/atmosphere boundary will thereby strongly depend on the activity of anaerobic methanogenic archaea and obligately aerobic methane oxidizing proteobacteria, which are known to be abundant and to significantly reduce methane emissions in permafrost-affected soils. Therefore current studies on methane-cycling microorganisms are the object of particular attention in permafrost studies, because of their key role in the Arctic methane cycle and consequently of their significance for the global methane budget.

Vishnivetskaya, T. [University of Tennessee, Knoxville (UTK); Liebner, Susanne [University of Tromso, Norway; Wilhelm, Ronald [McGill University, Montreal, Quebec; Wagner, Dirk [Alfred Wegener Institute for Polar and Marine Research, Potsdam, Germany

2011-01-01T23:59:59.000Z

264

American business cycles and innovation  

E-Print Network (OSTI)

Economists have long studied innovation and its effects on business cycles. Economist Joseph Alois Schumpeter (1883-1950) was the first economist to thoroughly discuss these ideas in his Theorie der wirtschaftlichen Entwicklung, published in 1911 (English translation: The Theory of Economic Development, 1934). This paper focuses on three issues: defining innovation, defining and identifying business cycles, and determining which innovations caused which business cycles. The first section introduces the concepts of innovation and invention. The second section discusses the business cycles and highlights general causes of business cycles. The final section details the history of the iron, steel, aluminum, and pharmaceutical industries and incorporates the available business and economic data (output, productivity, inventories, and capital investment) required to answer the central question: which innovations caused which business cycles? The iron industry, examined over the sixteenth and seventeenth centuries, reveals that its relationship to the business cycle is likely significant but was difficult to quantify because of limited data. An examination of the steel industry from the post-Civil War period to the early twentieth century follows. The steel industry had a significant effect on the business cycle and seemed to direct the business cycle during the growth in railroad mileage. Steel was a huge and indispensable industry for most of the 20[th] century so it makes a very important case to study. The aluminum industry is relevant to examine because the process for making aluminum has remained the same since the American inventor, Charles Hall, patented his method in 1889. The contribution of aluminum was significant because of the introduction of the large-scale electrical generators needed to produce aluminum. Finally, the paper focuses on the contribution of the pharmaceutical industry to the business cycle. The pharmaceutical industry is important to this study because it has already proved to be a major source of innovation and is an industry that will continue to play a significant role in the American economy. The findings reveal the contribution from this industry was most significant in the post-World War II era of research and development. The paper concludes with suggestions for improving and expanding this innovation and business cycle study.

Hood, Michael

2004-01-01T23:59:59.000Z

265

Photovoltaics: Life-cycle Analyses  

DOE Green Energy (OSTI)

Life-cycle analysis is an invaluable tool for investigating the environmental profile of a product or technology from cradle to grave. Such life-cycle analyses of energy technologies are essential, especially as material and energy flows are often interwoven, and divergent emissions into the environment may occur at different life-cycle-stages. This approach is well exemplified by our description of material and energy flows in four commercial PV technologies, i.e., mono-crystalline silicon, multi-crystalline silicon, ribbon-silicon, and cadmium telluride. The same life-cycle approach is applied to the balance of system that supports flat, fixed PV modules during operation. We also discuss the life-cycle environmental metrics for a concentration PV system with a tracker and lenses to capture more sunlight per cell area than the flat, fixed system but requires large auxiliary components. Select life-cycle risk indicators for PV, i.e., fatalities, injures, and maximum consequences are evaluated in a comparative context with other electricity-generation pathways.

Fthenakis V. M.; Kim, H.C.

2009-10-02T23:59:59.000Z

266

Life Cycle Inventory of a CMOS Chip  

E-Print Network (OSTI)

Reichl, H. “Life cycle inventory analysis and identificationAllen, D.T. ; “Life cycle inventory development for waferLife Cycle Inventory of a CMOS Chip Sarah Boyd and David

Boyd, Sarah; Dornfeld, David; Krishnan, Nikhil

2006-01-01T23:59:59.000Z

267

The DOE Water Cycle Pilot Study  

E-Print Network (OSTI)

The DOE Water Cycle Pilot Study N.L. Miller 1 *, A.W. KingCycle Research Strategy, DOE SC-0043, Office of BiologicalLBNL Report LBNL-53826. The DOE Water Cycle Pilot Study is

2003-01-01T23:59:59.000Z

268

Damage of Land Biosphere due to Intense Warming by 1000-Fold Rapid Increase in Atmospheric Methane: Estimation with a Climate–Carbon Cycle Model  

Science Conference Proceedings (OSTI)

Decadal-time-scale responses of climate and the global carbon cycle to warming associated with rapid increases in atmospheric methane from a massive methane release from marine sedimentary methane hydrates are investigated with a coupled climate–...

Atsushi Obata; Kiyotaka Shibata

2012-12-01T23:59:59.000Z

269

DOE Seeks to Invest up to $15 Million in Funding for Nuclear Fuel Cycle  

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

Seeks to Invest up to $15 Million in Funding for Nuclear Fuel Seeks to Invest up to $15 Million in Funding for Nuclear Fuel Cycle Technology Research and Development DOE Seeks to Invest up to $15 Million in Funding for Nuclear Fuel Cycle Technology Research and Development April 17, 2008 - 10:49am Addthis WASHINGTON, DC - The U.S. Department of Energy (DOE) today issued a Funding Opportunity Announcement (FOA) inviting universities, national laboratories, and industry to compete for up to $15 million to advance nuclear technologies closing the nuclear fuel cycle. These projects will provide necessary data and analyses to further U.S. nuclear fuel cycle technology development, as part of the Department's Advanced Fuel Cycle Initiative (AFCI), the domestic technology R&D component of the Global Nuclear Energy Partnership (GNEP). Studies resulting from this FOA will

270

DOE Seeks to Invest up to $15 Million in Funding for Nuclear Fuel Cycle  

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

DOE Seeks to Invest up to $15 Million in Funding for Nuclear Fuel DOE Seeks to Invest up to $15 Million in Funding for Nuclear Fuel Cycle Technology Research and Development DOE Seeks to Invest up to $15 Million in Funding for Nuclear Fuel Cycle Technology Research and Development April 17, 2008 - 10:49am Addthis WASHINGTON, DC - The U.S. Department of Energy (DOE) today issued a Funding Opportunity Announcement (FOA) inviting universities, national laboratories, and industry to compete for up to $15 million to advance nuclear technologies closing the nuclear fuel cycle. These projects will provide necessary data and analyses to further U.S. nuclear fuel cycle technology development, as part of the Department's Advanced Fuel Cycle Initiative (AFCI), the domestic technology R&D component of the Global Nuclear Energy Partnership (GNEP). Studies resulting from this FOA will

271

Identification and Analysis of Critical Gaps in Nuclear Fuel Cycle Codes Required by the SINEMA Program  

SciTech Connect

The current state of the art in nuclear fuel cycle (NFC) modeling is an eclectic mixture of codes with various levels of applicability, flexibility, and availability. In support of the advanced fuel cycle systems analyses, especially those by the Advanced Fuel Cycle Initiative (AFCI), Unviery of Cincinnati in collaboration with Idaho State University carried out a detailed review of the existing codes describing various aspects of the nuclear fuel cycle and identified the research and development needs required for a comprehensive model of the global nuclear energy infrastructure and the associated nuclear fuel cycles. Relevant information obtained on the NFC codes was compiled into a relational database that allows easy access to various codes' properties. Additionally, the research analyzed the gaps in the NFC computer codes with respect to their potential integration into programs that perform comprehensive NFC analysis.

Adrian Miron; Joshua Valentine; John Christenson; Majd Hawwari; Santosh Bhatt; Mary Lou Dunzik-Gougar: Michael Lineberry

2009-10-01T23:59:59.000Z

272

The Joint Center for Artificial Photosynthesis (JCAP) and Carbon Cycle 2.0 are honored to host Profs. Fujii, Sugiyama, and Bagheri from the University of Tokyo. They will be  

E-Print Network (OSTI)

energy cycle driver (Bagheri) The Global Solar + Initiative (GS+I) at the University of Tokyo When's new Global Solar + Initiative (GS+I). Started in November 2010, GS+I is addressing challenges in shifting to a sustainable global energy system which suppresses the emission of greenhouse gases. GS

273

Statistical global metabolic control analysis  

Science Conference Proceedings (OSTI)

This work introduces the concept of global sensitivity based on simultaneous variation of a complete set of enzymes, metabolite concentrations, and cofactors in finite ranges of concentrations. Perturbations are defined by finite ranges of concentrations ... Keywords: MCA metabolic control analysis, flux control coefficients, global sensitivity, homeostasis

Zelimir Kurtanjek

2009-03-01T23:59:59.000Z

274

Global and Regional Solutions Directorate  

E-Print Network (OSTI)

at Pacific NW National Lab (PNNL) ­ Founding Director Joint Global Change Research Institute (PNNL/UMd) ­ ALD (PNNL) ­ Environmental and Health Sciences Directorate; Emerging Technologies ­ Chief Scientist ­ Atmospheric Radiation Measurement Program ­ Director ­ PNNL Global Studies Program ­ Other (PNNL): Center

Homes, Christopher C.

275

GLOBAL IMPACT FROM THE HEART  

E-Print Network (OSTI)

GLOBAL IMPACT FROM THE HEART OF NORTHERN IRELAND #12;#12;CHANCELLOR'S WELCOME 4 VICE: INNOVATIVE AND WORLD-CLASS 18 CONTACT 26 CONTENTS 3GLOBAL IMPACT FROM THE HEART OF NORTHERN IRELAND #12;Queen THE HEART OF NORTHERN IRELANDGLOBAL IMPACT FROM THE HEART OF NORTHERN IRELAND CHANCELLOR'S WELCOME

Müller, Jens-Dominik

276

NETL Life Cycle Analysis Fact Sheets  

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

Life Cycle Analysis Fact Sheets Life Cycle Analysis Role of Alternative Energy Sources - Wind Technology Assessment PDF-372KB (Sept 2012) Role of Alternative Energy Sources -...

277

Building Technologies Office: Life Cycle Inventory Database  

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

Life Cycle Inventory Database to someone by E-mail Share Building Technologies Office: Life Cycle Inventory Database on Facebook Tweet about Building Technologies Office: Life...

278

Monthly, global emissions of carbon dioxide from fossil fuel consumption  

Science Conference Proceedings (OSTI)

This paper examines available data, develops a strategy and presents a monthly, global time series of fossil-fuel carbon dioxide emissions for the years 1950 2006. This monthly time series was constructed from detailed study of monthly data from the 21 countries that account for approximately 80% of global total emissions. These data were then used in a Monte Carlo approach to proxy for all remaining countries. The proportional-proxy methodology estimates by fuel group the fraction of annual emissions emitted in each country and month. Emissions from solid, liquid and gas fuels are explicitly modelled by the proportional-proxy method. The primary conclusion from this study is the global monthly time series is statistically significantly different from a uniform distribution throughout the year. Uncertainty analysis of the data presented show that the proportional-proxy method used faithfully reproduces monthly patterns in the data and the global monthly pattern of emissions is relatively insensitive to the exact proxy assignments used. The data and results presented here should lead to a better understanding of global and regional carbon cycles, especially when the mass data are combined with the stable carbon isotope data in atmospheric transport models.

Andres, Robert Joseph [ORNL; Gregg, JS [Riso National Laboratory, Roskilde, Denmark; Losey, London M [ORNL; Marland, Gregg [ORNL; Boden, Thomas A [ORNL

2011-01-01T23:59:59.000Z

279

Educational Global Climate Change Links  

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

Educational Global Climate Change Links Educational Global Climate Change Links Evidence of the importance of global climate change to the future generation is reflected in the increasing number of queries CDIAC receives from students and educators, from a range of educational levels. We have compiled a listing of some sites that we hope will be of interest and of use to those looking for information, fun, ideas, and ways that they can make a difference. These links were chosen because we have found them useful in responding to those with inquiring minds. These links will take the user outside of CDIAC, and are by no means comprehensive. We are not responsible for the content or intent of these outside links. Tools you can use! NOAA's Global Climate Dashboard - The Global Climate Dashboard is

280

Frequently Asked Global Change Questions  

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

Asked Global Change Questions Asked Global Change Questions This page lists global change questions that have been received at CDIAC and the answers that were provided to a diverse audience. If you have a question relating to carbon dioxide and global change and cannot find the answer you need here, you can "Ask Us a Question", and we will be glad to try to help you. Questions Should we grow trees to remove carbon in the atmosphere? What are the present tropospheric concentrations, global warming potentials (100 year time horizon), and atmospheric lifetimes of CO2, CH4, N2O, CFC-11, CFC-12, CFC-113, CCl4, methyl chloroform, HCFC-22, sulphur hexafluoride, trifluoromethyl sulphur pentafluoride, perfluoroethane, and surface ozone? Where can I find information on the naming of halocarbons?

Note: This page contains sample records for the topic "vast global cycle" 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

Life Cycle Analysis: Integrated Gasification Combined Cycle (IGCC) Power Plant  

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

Life Cycle Analysis: Integrated Life Cycle Analysis: Integrated Gasification Combined Cycle (IGCC) Power Plant Revision 2, March 2012 DOE/NETL-2012/1551 Disclaimer This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference therein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or

282

System dynamics modelling of product carbon footprint life cycles for collaborative green supply chains  

Science Conference Proceedings (OSTI)

Governments, environmental groups and industry associations are reducing greenhouse gas emissions to insure environmental sustainability. Manufacturing plays an important role in economic development but is a main cause of global warming since production ... Keywords: economic input–output life cycle assessment, mass customisation, product carbon footprint, system dynamics

AmyJ. C. Trappey; CharlesV. Trappey; Chih-Tung Hsiao; JerryJ. R. Ou; Chin-Tsung Chang

2012-10-01T23:59:59.000Z

283

A generalized multistage optimization modeling framework for life cycle assessment-based integrated solid waste management  

Science Conference Proceedings (OSTI)

Solid waste management (SWM) is an integral component of civil infrastructure and the global economy, and is a growing concern due to increases in population, urbanization, and economic development. In 2011, 1.3 billion metric tons of municipal solid ... Keywords: Decision support, Life cycle assessment, Multi-stage, Optimization, Solid waste

James W. Levis, Morton A. Barlaz, Joseph F. Decarolis, S. Ranji Ranjithan

2013-12-01T23:59:59.000Z

284

Implementation of GOES-based land surface temperature diurnal cycle D. SUN*{ and R. T. PINKER{  

E-Print Network (OSTI)

International Scientific Conference on the Global Energy and Water Cycle, Washington, DC, 17­21 June 1996, pp. 284­285 (Washington, DC: International GEWEX Office). 3984 Implementation of GOES-based LSTD to AVHRR. In this paper we use a new split-window LST algorithm based on radiative transfer calculations, as well

Sun, Donglian

285

Observed Tropospheric Temperature Response to 11-yr Solar Cycle and What It Reveals about Mechanisms  

Science Conference Proceedings (OSTI)

Using 54 yr of NCEP reanalysis global data from 1000 to 10 hPa, this study establishes the existence and the statistical significance of the zonal-mean temperature response to the 11-yr solar cycle throughout the troposphere and parts of the lower ...

Jiansong Zhou; Ka-Kit Tung

2013-01-01T23:59:59.000Z

286

Solar Thermochemical Fuels Production: Solar Fuels via Partial Redox Cycles with Heat Recovery  

SciTech Connect

HEATS Project: The University of Minnesota is developing a solar thermochemical reactor that will efficiently produce fuel from sunlight, using solar energy to produce heat to break chemical bonds. The University of Minnesota is envisioning producing the fuel by using partial redox cycles and ceria-based reactive materials. The team will achieve unprecedented solar-to-fuel conversion efficiencies of more than 10% (where current state-of-the-art efficiency is 1%) by combined efforts and innovations in material development, and reactor design with effective heat recovery mechanisms and demonstration. This new technology will allow for the effective use of vast domestic solar resources to produce precursors to synthetic fuels that could replace gasoline.

None

2011-12-19T23:59:59.000Z

287

Geothermal heat cycle research: Supercritical cycle with horizontal counterflow condenser  

DOE Green Energy (OSTI)

The Heat Cycle Research Program, which is being conducted for the Department of Energy, has as its objective the development of the technology for effecting the improved utilization of moderate temperature geothermal resources. To meet this objective, the program has as one of its goals to improve the performance of geothermal binary cycles to levels approaching the practicable thermodynamic maximum. In pursuit of this goal, tests are being conducted at the Heat Cycle Research Facility located at the DOE Geothermal Test Facility, East Mesa, California. The current testing involves the investigation of binary power cycle performance utilizing mixtures of non-adjacent hydrocarbons as the working fluids, with supercritical vaporization and in-tube condensation of the working fluid. In addition to the present test program, preparations are being made to investigate the binary cycle performance improvements which can be achieved by allowing supersaturated vapor expansions in the turbine. These efforts are anticipated to verify that through the utilization of these advanced power cycle concepts and allowing the supersaturated turbine expansions, improvements of up to 28% in the net geofluid effectiveness (net watt hours plant output per pound of geofluid) over conventional binary power plants can be achieved. Results are presented for the recent testing including those tests examining the performance of the countercurrent condenser at different tube inclinations. Performance of the heaters and the condenser in a vertical orientation can be predicted well with existing methods and data. The condenser in its near horizontal orientation performs slightly worse than in its vertical orientation. Some problems have been encountered in predicting the performance in the horizontal orientation. There is no evidence of departure from integral condensation in either orientation.

Mines, G.L.; Swank, W.D.; Bliem, C.J.

1987-01-01T23:59:59.000Z

288

A framework and methodology for nuclear fuel cycle transparency.  

Science Conference Proceedings (OSTI)

A key objective to the global deployment of nuclear technology is maintaining transparency among nation-states and international communities. By providing an environment in which to exchange scientific and technological information regarding nuclear technology, the safe and legitimate use of nuclear material and technology can be assured. Many nations are considering closed or multiple-application nuclear fuel cycles and are subsequently developing advanced reactors in an effort to obtain some degree of energy self-sufficiency. Proliferation resistance features that prevent theft or diversion of nuclear material and reduce the likelihood of diversion from the civilian nuclear power fuel cycle are critical for a global nuclear future. IAEA Safeguards have been effective in minimizing opportunities for diversion; however, recent changes in the global political climate suggest implementation of additional technology and methods to ensure the prompt detection of proliferation. For a variety of reasons, nuclear facilities are becoming increasingly automated and will require minimum manual operation. This trend provides an opportunity to utilize the abundance of process information for monitoring proliferation risk, especially in future facilities. A framework that monitors process information continuously can lead to greater transparency of nuclear fuel cycle activities and can demonstrate the ability to resist proliferation associated with these activities. Additionally, a framework designed to monitor processes will ensure the legitimate use of nuclear material. This report describes recent efforts to develop a methodology capable of assessing proliferation risk in support of overall plant transparency. The framework may be tested at the candidate site located in Japan: the Fuel Handling Training Model designed for the Monju Fast Reactor at the International Cooperation and Development Training Center of the Japan Atomic Energy Agency.

McClellan, Yvonne; York, David L.; Inoue, Naoko (Japan Atomic Energy Agency, Ibaraki, Japan); Love, Tracia L.; Rochau, Gary Eugene

2006-02-01T23:59:59.000Z

289

Global production through 2005  

SciTech Connect

Two companion studies released recently should provide great food for thought among geo-political strategists and various national governments. If predictions contained in these Petroconsultants studies of oil and gas production trends for the next 10 years are realized, there will be great repercussions for net exporters and importers, alike. After analyzing and predicting trends within each of the world`s significant producing nations for the 1996--2005 period, the crude oil and condensate report concludes tat global production will jump nearly 24%. By contrast, worldwide gas output will leap 40%. The cast of characters among producers and exporters that will benefit from these increases varies considerably for each fuel. On the oil side, Russia and the OPEC members, particularly the Persian Gulf nations, will be back in the driver`s seat in terms of affecting export and pricing patterns. On the gas side, the leading producers will be an interesting mix of mostly non-OPEC countries. The reemergence of Persian Gulf oil producers, coupled with an anticipated long-term decline among top non-OPEC producing nations should present a sobering picture to government planners within large net importers, such as the US. They are likely to find themselves in much the same supply trap as was experienced in the 1970s, only this time the dependence on foreign oil supplies will be much worse. Gas supplies will not be similarly constrained, and some substitution for oil is probable. Here, two articles, ``World oil industry is set for transition`` and ``Worldwide gas surges forward in next decade,`` present a summary of the findings detailed in Petroconsultants` recent studies.

Foreman, N.E. [Petroconsultants, Inc., Houston, TX (United States)

1996-12-01T23:59:59.000Z

290

Answering Key Fuel Cycle Questions  

Science Conference Proceedings (OSTI)

Given the range of fuel cycle goals and criteria, and the wide range of fuel cycle options, how can the set of options eventually be narrowed in a transparent and justifiable fashion? It is impractical to develop all options. We suggest an approach that starts by considering a range of goals for the Advanced Fuel Cycle Initiative (AFCI) and then posits seven questions, such as whether Cs and Sr isotopes should be separated from spent fuel and, if so, what should be done with them. For each question, we consider which of the goals may be relevant to eventually providing answers. The AFCI program has both ''outcome'' and ''process'' goals because it must address both waste already accumulating as well as completing the fuel cycle in connection with advanced nuclear power plant concepts. The outcome objectives are waste geologic repository capacity and cost, energy security and sustainability, proliferation resistance, fuel cycle economics, and safety. The process objectives are rea diness to proceed and adaptability and robustness in the face of uncertainties.

Piet, S.J.; Dixon, B.W.; Bennett, R.G.; Smith, J.D.; Hill, R.N.

2004-10-03T23:59:59.000Z

291

Delayed Seasonal Cycle and African Monsoon in a Warmer Climate  

E-Print Network (OSTI)

Increasing greenhouse gases will change many aspects of the Earth's climate, from its annual mean to the frequency of extremes such as heat waves and droughts. Here we report that the current generation of climate models predicts a delay in the seasonal cycle of global rainfall and ocean temperature in response to increasing greenhouse gases, with important implications for the regional monsoons. In particular, the rainy season of the semi-arid African Sahel is projected to start later and become shorter: an undesirable change for local rainfed agriculture and pastoralism. Previous work has highlighted the uncertainty in this region's response to anthropogenic global warming: summer rainfall is predicted either to decrease or increase by up to 30% depending which model is used. The robust agreement across models on the seasonal distribution of rainfall changes signifies that the onset date and length of the rainy season should be more predictable than annual mean anomalies.

Biasutti, Michela

2009-01-01T23:59:59.000Z

292

Creation of the WATCH Forcing Data and Its Use to Assess Global and Regional Reference Crop Evaporation over Land during the Twentieth Century  

Science Conference Proceedings (OSTI)

The Water and Global Change (WATCH) project evaluation of the terrestrial water cycle involves using land surface models and general hydrological models to assess hydrologically important variables including evaporation, soil moisture, and runoff. ...

G. P. Weedon; S. Gomes; P. Viterbo; W. J. Shuttleworth; E. Blyth; H. Österle; J. C. Adam; N. Bellouin; O. Boucher; M. Best

2011-10-01T23:59:59.000Z

293

Assessment of Hatch 1, Cycle 21 Fuel Failures  

Science Conference Proceedings (OSTI)

On 19 October 2003, Hatch Unit One located near Baxley, Georgia, experienced six duty-related fuel failures following a control blade notching adjustment. The Hatch 1 reactor was shut down for the End of Cycle 21 refueling outage on 14 February 2004. The duty associated with the Hatch 1 notching event was analyzed in detail and found to be relatively high. Global Nuclear Fuel (GNF), in collaboration with EPRI Fuel Reliability Program and Southern Nuclear Company, sponsored a hot cell examination to estab...

2008-12-08T23:59:59.000Z

294

Ultrafast thermal cycling of solar panels  

SciTech Connect

Two new cyclers that utilize a novel hybrid approach to perform fast thermal cycling of solar panels have been built and are now operational in the Mechanics and Materials Technology Center at The Aerospace Corporation. These cyclers are part of a continuing effort to minimize solar cell life test durations by accelerating the cycling rates. These fully automated cyclers, which provide continuous unmanned cycling in a gaseous nitrogen atmosphere, can execute 5 min cycles, thus yielding in excess of 100,000 cycles per year. They also have a unique capability of verifying solar panel functionality without interruption of cycling, so that cycling doesn`t continue on nonfunctioning panels.

Wall, T.S.; Valenzuela, P.R.; Sue, C.

1998-08-15T23:59:59.000Z

295

BPL Global | Open Energy Information  

Open Energy Info (EERE)

BPL Global BPL Global Jump to: navigation, search Name BPL Global Place Pittsburgh, Pennsylvania Zip 15222 Product BPL Global is a Pittburgh based company that uses broadband over powerline (BPL) to intergrate offerings of advanced metering infrastructure and broadband internet. Coordinates 40.438335°, -79.997459° 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":40.438335,"lon":-79.997459,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

296

Endeavor Global | Open Energy Information  

Open Energy Info (EERE)

Endeavor Global Endeavor Global Jump to: navigation, search Logo: Endeavor Global Name Endeavor Global Address 900 Broadway Place New York, New York Zip 10003 Coordinates 40.7391824°, -73.9897252° 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":40.7391824,"lon":-73.9897252,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

297

Global Circuit Model with Clouds  

Science Conference Proceedings (OSTI)

Cloud data from the International Satellite Cloud Climatology Project (ISCCP) database have been introduced into the global circuit model developed by Tinsley and Zhou. Using the cloud-top pressure data and cloud type information, the authors ...

Limin Zhou; Brian A. Tinsley

2010-04-01T23:59:59.000Z

298

Puzzles from the First Globalization  

E-Print Network (OSTI)

In the first globalization, 1870-1914, as in our own times, debates raged over the impact on domestic life of free movement across borders of goods, people, and capital. Then as today in the hard times that have followed ...

Berger, Suzanne

299

EPS Global International Cancer Conference  

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

Sept.10-12th, 2010 Suzhou, China Welcome Message Dear Colleagues and Friends, It is my pleasure to announce that EPS Global International Cancer Conference will be held on...

300

The Psychology of Global Warming  

Science Conference Proceedings (OSTI)

The evidence in support of global warming and the lack of significant published evidence to the contrary provides an extraordinarily strong foundation for the scientific community's call for action on greenhouse gas emissions. However, public ...

Ben R. Newell; Andrew J. Pitman

2010-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "vast global cycle" 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

Magnitude correlations in global seismicity  

Science Conference Proceedings (OSTI)

By employing natural time analysis, we analyze the worldwide seismicity and study the existence of correlations between earthquake magnitudes. We find that global seismicity exhibits nontrivial magnitude correlations for earthquake magnitudes greater than M{sub w}6.5.

Sarlis, N. V. [Solid State Section and Solid Earth Physics Institute, Physics Department, University of Athens, Panepistimiopolis, Zografos GR-157 84, Athens (Greece)

2011-08-15T23:59:59.000Z

302

THE GLOBAL NUCLEAR ENERGY PARTNERSHIP:  

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

GLOBAL NUCLEAR ENERGY PARTNERSHIP: GLOBAL NUCLEAR ENERGY PARTNERSHIP: Greater Energy Security in a Cleaner, Safer World The Global Nuclear Energy Partnership (GNEP) is a comprehensive strategy to increase U.S. and global energy security, encourage clean development around the world, reduce the risk of nuclear proliferation, and improve the environment. A plentiful, reliable supply of energy is the cornerstone of sustained economic growth and prosperity. Nuclear power is the only proven technology that can provide abundant supplies of base load electricity reliably and without air pollution or emissions of greenhouse gasses. In order to help meet growing demand for energy at home and encourage the growth of prosperity around the globe, GNEP provides for the safe, extensive expansion of clean nuclear power.

303

A Global Chance-Constraint for Stochastic Inventory Systems Under Service Level Constraints  

Science Conference Proceedings (OSTI)

We consider a class of production/inventory control problems that has a single product and a single stocking location, for which a stochastic demand with a known non-stationary probability distribution is given. Under the widely-known replenishment cycle ... Keywords: Global chance-constraints, Non-stationary (R,S) policy, Stochastic inventory control, Uncertainty

Roberto Rossi; S. Armagan Tarim; Brahim Hnich; Steven Prestwich

2008-12-01T23:59:59.000Z

304

ECONOMIC MODELING OF THE GLOBAL ADOPTION OF CARBON CAPTURE AND SEQUESTRATION TECHNOLOGIES  

E-Print Network (OSTI)

and sequestration as natural gas prices rise. INTRODUCTION Heightened concerns about global climate change have were added to EPPA for 1) coal power generation with CCS (coal capture), 2) natural gas combined cycle pulverized coal technology and the 3 #12;advanced natural gas technology. Compared with the pulverized coal

305

Conference for Biomass and Energy, Copenhagen, 1996 published by Elsevier BIOMASS ENERGY PRODUCTION: THE GLOBAL POTENTIAL  

E-Print Network (OSTI)

9th Conference for Biomass and Energy, Copenhagen, 1996 ­ published by Elsevier 1 BIOMASS ENERGY disturbance of the natural global carbon cycle. The "carbon-neutral" renewable energy carrier biomass seems of biomass for energy purposes. The CEBM comprises a biospheric part being based on the "Osnabrück Biosphere

Keeling, Stephen L.

306

Development of global hourly 0.5-degree land surface air temperature datasets  

Science Conference Proceedings (OSTI)

Land surface air temperature (SAT) is one of the most important variables in weather and climate studies, and its diurnal cycle and day-to-day variation are also needed for a variety of applications. Global long-term hourly SAT observational data, ...

Aihui Wang; Xubin Zeng

307

Development of Global Hourly 0.5° Land Surface Air Temperature Datasets  

Science Conference Proceedings (OSTI)

Land surface air temperature (SAT) is one of the most important variables in weather and climate studies, and its diurnal cycle is also needed for a variety of applications. Global long-term hourly SAT observational data, however, do not exist. ...

Aihui Wang; Xubin Zeng

2013-10-01T23:59:59.000Z

308

H gas turbine combined cycle  

SciTech Connect

A major step has been taken in the development of the Next Power Generation System--``H`` Technology Combined Cycle. This new gas turbine combined-cycle system increases thermal performance to the 60% level by increasing gas turbine operating temperature to 1,430 C (2,600 F) at a pressure ratio of 23 to 1. Although this represents a significant increase in operating temperature for the gas turbine, the potential for single digit NOx levels (based upon 15% O{sub 2}, in the exhaust) has been retained. The combined effect of performance increase and environmental control is achieved by an innovative closed loop steam cooling system which tightly integrates the gas turbine and steam turbine cycles. The ``H`` Gas Turbine Combined Cycle System meets the goals and objectives of the DOE Advanced Turbine System Program. The development and demonstration of this new system is being carried out as part of the Industrial/Government cooperative agreement under the ATS Program. This program will achieve first commercial operation of this new system before the end of the century.

Corman, J.

1995-12-31T23:59:59.000Z

309

LDPC codes from Singer cycles  

Science Conference Proceedings (OSTI)

The main goal of coding theory is to devise efficient systems to exploit the full capacity of a communication channel, thus achieving an arbitrarily small error probability. Low Density Parity Check (LDPC) codes are a family of block codes-characterised ... Keywords: LDPC Codes, Projective spaces, Singer cycles

Luca Giuzzi; Angelo Sonnino

2009-04-01T23:59:59.000Z

310

Characteristics of the Limit Cycle of a Reciprocating Quantum Heat Engine  

E-Print Network (OSTI)

When a reciprocating heat engine is started it eventually settles to a stable mode of operation. The approach of a first principle quantum heat engine toward this stable limit cycle is studied. The engine is based on a working medium consisting of an ensemble of quantum systems composed of two coupled spins. A four stroke cycle of operation is studied, with two {\\em isochore} branches where heat is transferred from the hot/cold baths and two {\\em adiabats} where work is exchanged. The dynamics is generated by a completely positive map. It has been shown that the performance of this model resembles an engine with intrinsic friction. The quantum conditional entropy is employed to prove the monotonic approach to a limit cycle. Other convex measures, such as the quantum distance display the same monotonic approach. The equations of motion of the engine are solved for the different branches and are combined to a global propagator that relates the state of the engine in the beginning of the cycle to the state after one period of operation of the cycle. The eigenvalues of the propagator define the rate of relaxation toward the limit cycle. A longitudinal and transverse mode of approach to the limit cycle is identified. The entropy balance is used to explore the necessary conditions which lead to a stable limit cycle. The phenomena of friction can be identified with a zero change in the von Neumann entropy of the working medium.

Tova Feldmann; Ronnie Kosloff

2004-05-28T23:59:59.000Z

311

NERSC Calculations Provide Independent Confirmation of Global...  

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

NERSC Calculations Provide Independent Confirmation of Global Land Warming Since 1901 NERSC Calculations Provide Independent Confirmation of Global Land Warming Since 1901...

312

The Private Regulation of Global Corporate Conduct  

E-Print Network (OSTI)

ameliorate the negative social impacts of global markets isenvironmental and social impacts and the royalty paymentscriticisms of the social impact of economic globalization

Vogel, David

2006-01-01T23:59:59.000Z

313

Building Technologies Office: Global Superior Energy Performance  

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

Global Superior Energy Global Superior Energy Performance Partnership to someone by E-mail Share Building Technologies Office: Global Superior Energy Performance Partnership on Facebook Tweet about Building Technologies Office: Global Superior Energy Performance Partnership on Twitter Bookmark Building Technologies Office: Global Superior Energy Performance Partnership on Google Bookmark Building Technologies Office: Global Superior Energy Performance Partnership on Delicious Rank Building Technologies Office: Global Superior Energy Performance Partnership on Digg Find More places to share Building Technologies Office: Global Superior Energy Performance Partnership on AddThis.com... About Take Action to Save Energy Activities 179d Tax Calculator Advanced Energy Design Guides Advanced Energy Retrofit Guides

314

Global Environment Facility (GEF) | Open Energy Information  

Open Energy Info (EERE)

Edit with form History Share this page on Facebook icon Twitter icon Global Environment Facility (GEF) Jump to: navigation, search Name Global Environment Facility Address...

315

Global Energias Renovables SL | Open Energy Information  

Open Energy Info (EERE)

Energias Renovables SL Jump to: navigation, search Name Global Energias Renovables SL Place Madrid, Spain Sector Wind energy Product Spanish wind power developer. References Global...

316

Global Celsius SL | Open Energy Information  

Open Energy Info (EERE)

Celsius SL Jump to: navigation, search Name Global Celsius SL Place Madrid, Spain Sector Wind energy Product Spanish wind project developer. References Global Celsius SL1...

317

Global Alternative Fuels | Open Energy Information  

Open Energy Info (EERE)

Alternative Fuels Jump to: navigation, search Name Global Alternative Fuels Place El Paso, Texas Zip 79922 Product Global Alternative Fuels processes virgin oils (palm, soybean,...

318

Global Green Partners | Open Energy Information  

Open Energy Info (EERE)

Login | Sign Up Search Page Edit with form History Facebook icon Twitter icon Global Green Partners Jump to: navigation, search Name Global Green Partners Place Los Altos,...

319

Sunrise Global Solar Energy | Open Energy Information  

Open Energy Info (EERE)

Page Edit with form History Facebook icon Twitter icon Sunrise Global Solar Energy Jump to: navigation, search Name Sunrise Global Solar Energy Place Taoyuan County, Taiwan Zip...

320

Global Fossil Fuel Carbon Emissions - Graphics  

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

Fossil-Fuel CO2 Emissions Global Graphics Global Fossil-Fuel Carbon Emissions - Graphics Data graphic Data (ASCII, Fixed Format) Data graphic Data (ASCII, Comma-delimited)...

Note: This page contains sample records for the topic "vast global cycle" 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

Combustion of biomass as a global carbon sink  

E-Print Network (OSTI)

This note is intended to highlight the important role of black carbon produced from biomass burning in the global carbon cycle, and encourage further research in this area. Consideration of the fundamental physical chemistry of cellulose thermal decomposition suggests that suppression of biomass burning or biasing burning practices to produce soot-free flames must inevitably transfer more carbon to the atmosphere. A simple order-of-magnitude quantitative analysis indicates that black carbon may be a significant carbon reservoir that persists over geological time scales.

Ball, Rowena

2008-01-01T23:59:59.000Z

322

Recent Global Climate Change-Related News and Publications  

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

Recent Global Climate Change-Related News and Publications Recent Global Climate Change-Related News and Publications A sampling of what CDIAC staff members have been following: Extreme summer weather in northern mid-latitudes linked to a vanishing cryosphere. Tang, Q., X. Zhang, and J.A. Francis, 2013, Nature Climate Change DOI: 10.1038/nclimate2065. Uncertainty in annual aankings from NOAA's global temperature time series. Arguez A., T.R. Karl, M.F. Squires, and R.S. Vose, 2013, Geophysical Research Letters DOI: 10.1002/2013GL057999. Climate extremes and the carbon cycle. Reichstein, M., et al.., 2013, Nature DOI: 10.1038/nature12350. Anatomy of an extreme event. Hoerling, M., et al., 2013, J. Climate DOI: 10.1175/JCLI-D-12-00270.1. Australia's unique influence on global sea level in 2010-2011. Fasullo, J.T., C. Boening, F.W. Landerer, and R.S. Nerem, 2013, Geophysical

323

The Global Nuclear Energy Partnership (GNEP) | Department of...  

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

The Global Nuclear Energy Partnership (GNEP) The Global Nuclear Energy Partnership (GNEP) An article that examines the global nuclear energy partnership. The Global Nuclear Energy...

324

Using a Bayesian framework and global sensitivity analysis to identify strengths and weaknesses of two process-based models differing in representation of autotrophic respiration  

Science Conference Proceedings (OSTI)

Process-based models are powerful tools for sustainable and adaptive forest management. Bayesian statistics and global sensitivity analysis allow to reduce uncertainties in parameters and outputs, and they provide better insight of model behaviour. In ... Keywords: 3-PG, Bayesian calibration, Bayesian model comparison, Carbon cycle, Global sensitivity analysis, Morris screening, Net primary production, Respiration, Uncertainty analysis

F. Minunno; M. Van Oijen; D. R. Cameron; S. Cerasoli; J. S. Pereira; M. Tomé

2013-04-01T23:59:59.000Z

325

Definition: Rankine cycle | Open Energy Information  

Open Energy Info (EERE)

Rankine cycle Rankine cycle Jump to: navigation, search Dictionary.png Rankine cycle Sometimes referred to as the steam cycle. Fuel is used to heat a liquid to produce a high pressure gas that expands and produces work, such as turning a turbine; when the turbine is connected to a generator, it produces electricity. Usually water is the liquid used in the Rankine cycle (to produce steam), but other liquids can also be used. The exhaust vapor expelled from the turbine condenses and the liquid is pumped back to the boiler to repeat the cycle.[1][2] View on Wikipedia Wikipedia Definition The Rankine cycle is a mathematical model that is used to predict the performance of steam engines. The Rankine cycle is an idealised thermodynamic cycle of a heat engine that converts heat into mechanical

326

Global Cooling: Effect of Urban Albedo on Global Temperature  

SciTech Connect

In many urban areas, pavements and roofs constitute over 60% of urban surfaces (roof 20-25%, pavements about 40%). The roof and the pavement albedo can be increased by about 0.25 and 0.10, respectively, resulting in a net albedo increase for urban areas of about 0.1. Many studies have demonstrated building cooling-energy savings in excess of 20% upon raising roof reflectivity from an existing 10-20% to about 60%. We estimate U.S. potential savings in excess of $1 billion (B) per year in net annual energy bills. Increasing albedo of urban surfaces can reduce the summertime urban temperature and improve the urban air quality. Increasing the urban albedo has the added benefit of reflecting more of the incoming global solar radiation and countering the effect of global warming. We estimate that increasing albedo of urban areas by 0.1 results in an increase of 3 x 10{sup -4} in Earth albedo. Using a simple global model, the change in air temperature in lowest 1.8 km of the atmosphere is estimated at 0.01K. Modelers predict a warming of about 3K in the next 60 years (0.05K/year). Change of 0.1 in urban albedo will result in 0.01K global cooling, a delay of {approx}0.2 years in global warming. This 0.2 years delay in global warming is equivalent to 10 Gt reduction in CO2 emissions.

Akbari, Hashem; Menon, Surabi; Rosenfeld, Arthur

2007-05-22T23:59:59.000Z

327

Making Global Illumination User Friendly  

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

Making Global Illumination User Friendly Making Global Illumination User Friendly Title Making Global Illumination User Friendly Publication Type Conference Paper LBNL Report Number LBL-37860 Year of Publication 1995 Authors Ward, Gregory J. Conference Name 6th Eurographics Workshop on Rendering Date Published 06/1995 Conference Location Dublin, Ireland Call Number LBL-37860 Abstract Global illumination researchers tend to think in terms of mesh density and sampling frequency, and their software reflects this in its user interface. Advanced rendering systems are rife with long command lines and parameters for tuning the sample densities, thresholds and other algorithm-specific variables, and the novice user is quickly lost in a sea of possibilities. This paper details a successful effort of making one such global illumination system usable by people who understand their problems, even if they do not understand the methods needed to solve them, through an assisted oracle approach. A single program is introduced to map a small set of intuitive control variables to the rendering commands and parameter settings needed to produce the desired output in a reasonable time. This new executive program then serves as the basis for a graphical user interface that is both friendly in its appearance and reliable in its performance. Finally, we conclude with some future directions for improving this interface.

328

Medium Truck Duty Cycle (MTDC)  

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

Routes Data Acquisition System Setup Routes Data Acquisition System Setup Medium Truck Duty Cycle (MTDC) Objective This Department of Energy project focuses on the collection and analysis medium truck (Class-6 and -7) duty cycle data from real-world operations. Analysis of this data will provide information pertaining to the fuel efficiencies and performance of medium trucks in several vocations. Outcomes Rich source of data and information that can contribute to the development of new tools Sound basis upon which DOE can make technology investment decisions A national archive of real-world-based medium-truck operational data that will support medium-duty vehicle energy efficiency research Collected Data Speed & Acceleration Fuel Consumption GPS Location Road Grade

329

Advanced Fuel Cycle Cost Basis  

SciTech Connect

This report, commissioned by the U.S. Department of Energy (DOE), provides a comprehensive set of cost data supporting a cost analysis for the relative economic comparison of options for use in the Advanced Fuel Cycle Initiative (AFCI) Program. The report describes the AFCI cost basis development process, reference information on AFCI cost modules, a procedure for estimating fuel cycle costs, economic evaluation guidelines, and a discussion on the integration of cost data into economic computer models. This report contains reference cost data for 25 cost modules—23 fuel cycle cost modules and 2 reactor modules. The cost modules were developed in the areas of natural uranium mining and milling, conversion, enrichment, depleted uranium disposition, fuel fabrication, interim spent fuel storage, reprocessing, waste conditioning, spent nuclear fuel (SNF) packaging, long-term monitored retrievable storage, near surface disposal of low-level waste (LLW), geologic repository and other disposal concepts, and transportation processes for nuclear fuel, LLW, SNF, transuranic, and high-level waste.

D. E. Shropshire; K. A. Williams; W. B. Boore; J. D. Smith; B. W. Dixon; M. Dunzik-Gougar; R. D. Adams; D. Gombert; E. Schneider

2008-03-01T23:59:59.000Z

330

Advanced Fuel Cycle Cost Basis  

SciTech Connect

This report, commissioned by the U.S. Department of Energy (DOE), provides a comprehensive set of cost data supporting a cost analysis for the relative economic comparison of options for use in the Advanced Fuel Cycle Initiative (AFCI) Program. The report describes the AFCI cost basis development process, reference information on AFCI cost modules, a procedure for estimating fuel cycle costs, economic evaluation guidelines, and a discussion on the integration of cost data into economic computer models. This report contains reference cost data for 26 cost modules—24 fuel cycle cost modules and 2 reactor modules. The cost modules were developed in the areas of natural uranium mining and milling, conversion, enrichment, depleted uranium disposition, fuel fabrication, interim spent fuel storage, reprocessing, waste conditioning, spent nuclear fuel (SNF) packaging, long-term monitored retrievable storage, near surface disposal of low-level waste (LLW), geologic repository and other disposal concepts, and transportation processes for nuclear fuel, LLW, SNF, and high-level waste.

D. E. Shropshire; K. A. Williams; W. B. Boore; J. D. Smith; B. W. Dixon; M. Dunzik-Gougar; R. D. Adams; D. Gombert

2007-04-01T23:59:59.000Z

331

Advanced Fuel Cycle Cost Basis  

SciTech Connect

This report, commissioned by the U.S. Department of Energy (DOE), provides a comprehensive set of cost data supporting a cost analysis for the relative economic comparison of options for use in the Advanced Fuel Cycle Initiative (AFCI) Program. The report describes the AFCI cost basis development process, reference information on AFCI cost modules, a procedure for estimating fuel cycle costs, economic evaluation guidelines, and a discussion on the integration of cost data into economic computer models. This report contains reference cost data for 25 cost modules—23 fuel cycle cost modules and 2 reactor modules. The cost modules were developed in the areas of natural uranium mining and milling, conversion, enrichment, depleted uranium disposition, fuel fabrication, interim spent fuel storage, reprocessing, waste conditioning, spent nuclear fuel (SNF) packaging, long-term monitored retrievable storage, near surface disposal of low-level waste (LLW), geologic repository and other disposal concepts, and transportation processes for nuclear fuel, LLW, SNF, transuranic, and high-level waste.

D. E. Shropshire; K. A. Williams; W. B. Boore; J. D. Smith; B. W. Dixon; M. Dunzik-Gougar; R. D. Adams; D. Gombert; E. Schneider

2009-12-01T23:59:59.000Z

332

Combined-cycle power tower  

DOE Green Energy (OSTI)

This paper evaluates a new power tower concept that offers significant benefits for commercialization of power tower technology. The concept uses a molten nitrate salt centralreceiver plant to supply heat, in the form of combustion air preheat, to a conventional combined-cycle power plant. The evaluation focused on first commercial plants, examined three plant capacities (31, 100, and 300 MWe), and compared these plants with a solar-only 100-MWe plant and with gas-only combined-cycle plants in the same three capacities. Results of the analysis point to several benefits relative to the solar-only plant including low energy cost for first plants, low capital cost for first plants, reduced risk with respect to business uncertainties, and the potential for new markets. In addition, the concept appears to have minimal technology development requirements. Significantly, the results show that it is possible to build a first plant with this concept that can compete with existing gas-only combined-cycle plants.

Bohn, M.S.; Williams, T.A.; Price, H.W.

1994-10-01T23:59:59.000Z

333

Life Cycle Greenhouse Gas Emissions of Nuclear Electricity Generation: Systematic Review and Harmonization  

SciTech Connect

A systematic review and harmonization of life cycle assessment (LCA) literature of nuclear electricity generation technologies was performed to determine causes of and, where possible, reduce variability in estimates of life cycle greenhouse gas (GHG) emissions to clarify the state of knowledge and inform decision making. LCA literature indicates that life cycle GHG emissions from nuclear power are a fraction of traditional fossil sources, but the conditions and assumptions under which nuclear power are deployed can have a significant impact on the magnitude of life cycle GHG emissions relative to renewable technologies. Screening 274 references yielded 27 that reported 99 independent estimates of life cycle GHG emissions from light water reactors (LWRs). The published median, interquartile range (IQR), and range for the pool of LWR life cycle GHG emission estimates were 13, 23, and 220 grams of carbon dioxide equivalent per kilowatt-hour (g CO{sub 2}-eq/kWh), respectively. After harmonizing methods to use consistent gross system boundaries and values for several important system parameters, the same statistics were 12, 17, and 110 g CO{sub 2}-eq/kWh, respectively. Harmonization (especially of performance characteristics) clarifies the estimation of central tendency and variability. To explain the remaining variability, several additional, highly influential consequential factors were examined using other methods. These factors included the primary source energy mix, uranium ore grade, and the selected LCA method. For example, a scenario analysis of future global nuclear development examined the effects of a decreasing global uranium market-average ore grade on life cycle GHG emissions. Depending on conditions, median life cycle GHG emissions could be 9 to 110 g CO{sub 2}-eq/kWh by 2050.

Warner, E. S.; Heath, G. A.

2012-04-01T23:59:59.000Z

334

(Chemistry of the global atmosphere)  

SciTech Connect

The traveler attended the conference The Chemistry of the Global Atmosphere,'' and presented a paper on the anthropogenic emission of carbon dioxide (CO{sub 2}) to the atmosphere. The conference included meetings of the International Global Atmospheric Chemistry (IGAC) programme, a core project of the International Geosphere/Biosphere Programme (IGBP) and the traveler participated in meetings on the IGAC project Development of Global Emissions Inventories'' and agreed to coordinate the working group on CO{sub 2}. Papers presented at the conference focused on the latest developments in analytical methods, modeling and understanding of atmospheric CO{sub 2}, CO, CH{sub 4}, N{sub 2}O, SO{sub 2}, NO{sub x}, NMHCs, CFCs, and aerosols.

Marland, G.

1990-09-27T23:59:59.000Z

335

BBSLA – Malaysia (032410) English (Global Version 031010) ...  

Science Conference Proceedings (OSTI)

BBSLA – Malaysia (032410) English (Global Version 031010) 1 BLACKBERRY SOLUTION LICENSE AGREEMENT PLEASE READ THIS ...

336

BBSLA – Argentina (031710) Spanish (Global Version ...  

Science Conference Proceedings (OSTI)

BBSLA – Argentina (031710) Spanish (Global Version 031010) CONTRATO DE LICENCIA DE SOLUCIÓN BLACKBERRY FAVOR LEER ESTE ...

337

BBSLA – Pakistan (032310) English (Global Version 031010) ...  

Science Conference Proceedings (OSTI)

BBSLA – Pakistan (032310) English (Global Version 031010) 1 BLACKBERRY SOLUTION LICENSE AGREEMENT PLEASE READ THIS ...

338

BBSLA – Thailand (032410) English (Global Version 031010) ...  

Science Conference Proceedings (OSTI)

BBSLA – Thailand (032410) English (Global Version 031010) 1 BLACKBERRY SOLUTION LICENSE AGREEMENT PLEASE READ THIS ...

339

BBSLA - South Africa (031910) English (Global Version ...  

Science Conference Proceedings (OSTI)

BBSLA - South Africa (031910) English (Global Version 031010) 1 BLACKBERRY SOLUTION LICENSE AGREEMENT PLEASE READ THIS ...

340

Global warming: A Northwest perspective  

SciTech Connect

The Northwest Power Planning Council convened a symposium in Olympia, Washington, on the subject of global climate change ( the greenhouse effect'') and its potential for affecting the Pacific Northwest. The symposium was organized in response to a need by the Power Council to understand global climate change and its potential impacts on resource planning and fish and wildlife planning for the region, as well as a need to understand national policy developing toward climate change and the Pacific Northwest's role in it. 40 figs., 15 tabs.

Scott, M.J.; Counts, C.A. (eds.)

1990-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "vast global cycle" 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

Global change: Acronyms and abbreviations  

SciTech Connect

This list of acronyms and abbreviations is compiled to provide the user with a ready reference to dicipher the linguistic initialisms and abridgements for the study of global change. The terms included in this first edition were selected from a wide variety of sources: technical reports, policy documents, global change program announcements, newsletters, and other periodicals. The disciplinary interests covered by this document include agriculture, atmospheric science, ecology, environmental science, oceanography, policy science, and other fields. In addition to its availability in hard copy, the list of acronyms and abbreviations is available in DOS-formatted diskettes and through CDIAC`s anonymous File Transfer Protocol (FTP) area on the Internet.

Woodard, C.T. [Oak Ridge National Lab., TN (United States); Stoss, F.W. [Univ. of Tennessee, Knoxville, TN (United States). Energy, Environment and Resources Center

1995-05-01T23:59:59.000Z

342

Global Scratch File System at NERSC  

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

Scratch Scratch Global Scratch File System Overview The global scratch file system (or "global scratch") can be accessed by multiple NERSC systems. Its default quota is much larger than the Global Home quota, so it can be used to temporarily store large amounts of data. This file system is periodically purged. Platforms Using Global Scratch The global scratch file system is available on all NERSC systems except PDSF. Quotas Default global scratch quotas are 20 TB and 2,000,000 inodes. If you need more than that, fill out the Disk Quota Change Request Form. Purging Yes, files in global scratch file system are subject to purging. Backup No, Files in global scratch file system are not backed up. Environment Variable You can reference your personal scratch directory in global scratch as

343

The Global Impact of the Systemic Economies and MENA Business Cycles  

E-Print Network (OSTI)

the MENA Region We extend the country coverage of the GVAR dataset used in Dees et al. (2007) by adding 14 countries located in the Middle East and North Africa region as well as three other Organization of the Petroleum Exporting Countries (OPEC) members... model and provide justi?cation for our modelling speci?cation. For various data sources used to build the quarterly GVAR dataset, covering 1979Q2 to 2011Q2, see the Data Appendix. 3.1.1 Domestic Variables Real GDP, yit, the rate of in?ation, #25;it...

Cashin, Paul; Mohaddes, Kamiar; Raissi, Mehdi

2012-11-01T23:59:59.000Z

344

Marine methane cycle simulations for the period of early global warming  

E-Print Network (OSTI)

venting in the eastern Aleutian subduction zone, J. Geophys.Northern California Aleutians, Bering slope California Bight

Elliott, S.

2011-01-01T23:59:59.000Z

345

Associations between the Global Energy Cycle and Regional Rainfall in South Africa and Southwest Australia  

Science Conference Proceedings (OSTI)

Large-scale atmospheric processes in the Southern Hemisphere are examined on both seasonal and daily time scales in order to seek associations between these and regional rainfall variability in the summer rainfall areas of South Africa and the ...

Warren J. Tennant; Chris J. C. Reason

2005-08-01T23:59:59.000Z

346

Characterization of the Global Hydrologic Cycle from a Back-Trajectory Analysis of Atmospheric Water Vapor  

Science Conference Proceedings (OSTI)

Regional precipitation recycling may constitute a feedback mechanism affecting soil moisture memory and the persistence of anomalously dry or wet states. Bulk methods, which estimate recycling based on time-averaged variables, have been applied ...

Paul A. Dirmeyer; Kaye L. Brubaker

2007-02-01T23:59:59.000Z

347

Marine methane cycle simulations for the period of early global warming  

E-Print Network (OSTI)

of a hydrate based marine desalination technology on marineentirely here. The slight desalination imparted by clathrate

Elliott, S.

2011-01-01T23:59:59.000Z

348

Landfill CH sub 4 : Rates, fates, and role in global carbon cycle  

SciTech Connect

Published estimates for worldwide landfill methane emissions range from 9 to 70 Tg yr{sup {minus}1}. Field and laboratory studies suggest that maximum methane yields from lanfilled refuse are about 0.06 to 0.09 m{sup 3} (dry Kg){sup {minus}1} refuse, depending on moisture content and other variables, such as organic loading, buffering capacity, and nutrients in landfill microevnironments. Methane yields may vary by more than an order of magnitude within a given site. Fates for landfill methane include (1) direct or delayed emission to the atmosphere through landfill cover materials or surface soils; (2) oxidation by methanotrophs in cover soils, with resulting emission of carbon dioxide; or (3) recovery of methane followed by combustion to produce carbon dioxide. The percent methane assigned to each pathway will vary among field sites and, for individual sites, through time. Nevertheless, a general framework for a landfill methane balance can be developed by consideration of landfill age, engineering and management practices, cover soil characteristics, and water balance. Direct measurements of landfill methane emissions are sparse, with rates between 10{sup {minus}6} and 10{sup {minus}8} g cm{sup {minus}2} s{sup {minus}1}; very high rates of 400 kg m{sup {minus}2} yr{sup {minus}1} have been measured at a semiarid unvegetated site. The proportion of landfill carbon that is ultimately converted to methane and carbon dioxide is problematical; the literature suggests that, at best, 25% to 40% of refuse carbon can be converted to biogas carbon. Cellulose contributes the major portion of the methane potential. Routine excavation of nondecomposed cellulosic materials after one or two decades of landfill burial suggests that uniformly high conversion rates are rarely attained at field sites.

Bogner, J.; Spokas, K.

1991-01-01T23:59:59.000Z

349

Landfill CH{sub 4}: Rates, fates, and role in global carbon cycle  

SciTech Connect

Published estimates for worldwide landfill methane emissions range from 9 to 70 Tg yr{sup {minus}1}. Field and laboratory studies suggest that maximum methane yields from lanfilled refuse are about 0.06 to 0.09 m{sup 3} (dry Kg){sup {minus}1} refuse, depending on moisture content and other variables, such as organic loading, buffering capacity, and nutrients in landfill microevnironments. Methane yields may vary by more than an order of magnitude within a given site. Fates for landfill methane include (1) direct or delayed emission to the atmosphere through landfill cover materials or surface soils; (2) oxidation by methanotrophs in cover soils, with resulting emission of carbon dioxide; or (3) recovery of methane followed by combustion to produce carbon dioxide. The percent methane assigned to each pathway will vary among field sites and, for individual sites, through time. Nevertheless, a general framework for a landfill methane balance can be developed by consideration of landfill age, engineering and management practices, cover soil characteristics, and water balance. Direct measurements of landfill methane emissions are sparse, with rates between 10{sup {minus}6} and 10{sup {minus}8} g cm{sup {minus}2} s{sup {minus}1}; very high rates of 400 kg m{sup {minus}2} yr{sup {minus}1} have been measured at a semiarid unvegetated site. The proportion of landfill carbon that is ultimately converted to methane and carbon dioxide is problematical; the literature suggests that, at best, 25% to 40% of refuse carbon can be converted to biogas carbon. Cellulose contributes the major portion of the methane potential. Routine excavation of nondecomposed cellulosic materials after one or two decades of landfill burial suggests that uniformly high conversion rates are rarely attained at field sites.

Bogner, J.; Spokas, K.

1991-12-31T23:59:59.000Z

350

Toward single-cycle optical pulses  

E-Print Network (OSTI)

Single-cycle optical pulses, the never-before-achieved regime, have a great potential for attosecond science and phase-sensitive nonlinear optics. To achieve single-cycle optical pulses by active synchronization, three ...

Kim, Jung-Won, 1976-

2004-01-01T23:59:59.000Z

351

WEB RESOURCES: The Nuclear Fuel Cycle - TMS  

Science Conference Proceedings (OSTI)

Feb 12, 2007 ... A compilation of links to websites describing the nuclear fuel cycle. A link to a short overview of the entire cycle is included as well as a ...

352

Rethinking the light water reactor fuel cycle  

E-Print Network (OSTI)

The once through nuclear fuel cycle adopted by the majority of countries with operating commercial power reactors imposes a number of concerns. The radioactive waste created in the once through nuclear fuel cycle has to ...

Shwageraus, Evgeni, 1973-

2004-01-01T23:59:59.000Z

353

Profit cycle dynamics by Kawika Pierson.  

E-Print Network (OSTI)

My thesis consists of three essays investigating the existence, causes, and mitigation of profit cycles at an industry level. The first essay examines profit cycles by proposing that the industry-specific features of how ...

Pierson, Kawika (Kawika Paul)

2011-01-01T23:59:59.000Z

354

Application of the thorium fuel cycle  

SciTech Connect

An economic analysis of the application of the thorium fuel cycle to thermal reactors is presented. (JWR)

Kasten, P.R.; Tobias, M.L.

1975-01-01T23:59:59.000Z

355

Development Plan for the Fuel Cycle Simulator  

Science Conference Proceedings (OSTI)

The Fuel Cycle Simulator (FCS) project was initiated late in FY-10 as the activity to develop a next generation fuel cycle dynamic analysis tool for achieving the Systems Analysis Campaign 'Grand Challenge.' This challenge, as documented in the Campaign Implementation Plan, is to: 'Develop a fuel cycle simulator as part of a suite of tools to support decision-making, communication, and education, that synthesizes and visually explains the multiple attributes of potential fuel cycles.'

Brent Dixon

2011-09-01T23:59:59.000Z

356

Political Cycles and the Stock Market  

E-Print Network (OSTI)

forecast the stock market as controls for business cycle ?uctuations. After controlling for the dividend-price

Santa-Clara, Pedro; Valkanov, Rossen

2000-01-01T23:59:59.000Z

357

Combined Cycle Performance Tracking Guideline: Interim Report  

Science Conference Proceedings (OSTI)

The Electric Power Research Institute’s (EPRI’s) Combined Cycle Performance Monitoring and Recovery Guideline (EPRI report 1023971) was developed in 2012 to provide plant owners and operators with a comprehensive guideline for identifying and quantifying combined-cycle performance losses and appropriate recovery activities for a generic F-Class combined-cycle power plant (CCPP). This report, Combined-Cycle Performance Tracking Guideline, has been developed as an adjunct ...

2013-12-23T23:59:59.000Z

358

Search for relationship between duration of the extended solar cycles and amplitude of sunspot cycle  

E-Print Network (OSTI)

Duration of the extended solar cycles is taken into the consideration. The beginning of cycles is counted from the moment of polarity reversal of large-scale magnetic field in high latitudes, occurring in the sunspot cycle n till the minimum of the cycle n+2. The connection between cycle duration and its amplitude is established. Duration of the "latent" period of evolution of extended cycle between reversals and a minimum of the current sunspot cycle is entered. It is shown, that the latent period of cycles evolution is connected with the next sunspot cycle amplitude and can be used for the prognosis of a level and time of a sunspot maximum. The 24-th activity cycle prognosis is done. Long-term behavior of extended cycle's lengths is considered.

Tlatov, A G

2007-01-01T23:59:59.000Z

359

Search for relationship between duration of the extended solar cycles and amplitude of sunspot cycle  

E-Print Network (OSTI)

Duration of the extended solar cycles is taken into the consideration. The beginning of cycles is counted from the moment of polarity reversal of large-scale magnetic field in high latitudes, occurring in the sunspot cycle n till the minimum of the cycle n+2. The connection between cycle duration and its amplitude is established. Duration of the "latent" period of evolution of extended cycle between reversals and a minimum of the current sunspot cycle is entered. It is shown, that the latent period of cycles evolution is connected with the next sunspot cycle amplitude and can be used for the prognosis of a level and time of a sunspot maximum. The 24-th activity cycle prognosis is done. Long-term behavior of extended cycle's lengths is considered.

A. G. Tlatov

2007-03-27T23:59:59.000Z

360

Carbon Cycling and Biosequestration Integrating Biology and Climate Through Systems Science Report from the March 2008 Workshop  

Science Conference Proceedings (OSTI)

One of the most daunting challenges facing science in the 21st Century is to predict how Earth's ecosystems will respond to global climate change. The global carbon cycle plays a central role in regulating atmospheric carbon dioxide (CO{sub 2}) levels and thus Earth's climate, but our basic understanding of the myriad of tightly interlinked biological processes that drive the global carbon cycle remains limited at best. Whether terrestrial and ocean ecosystems will capture, store, or release carbon is highly dependent on how changing climate conditions affect processes performed by the organisms that form Earth's biosphere. Advancing our knowledge of biological components of the global carbon cycle is thus crucial to predicting potential climate change impacts, assessing the viability of climate change adaptation and mitigation strategies, and informing relevant policy decisions. Global carbon cycling is dominated by the paired biological processes of photosynthesis and respiration. Photosynthetic plants and microbes of Earth's land-masses and oceans use solar energy to transform atmospheric CO{sub 2} into organic carbon. The majority of this organic carbon is rapidly consumed by plants or microbial decomposers for respiration and returned to the atmosphere as CO{sub 2}. Coupling between the two processes results in a near equilibrium between photosynthesis and respiration at the global scale, but some fraction of organic carbon also remains in stabilized forms such as biomass, soil, and deep ocean sediments. This process, known as carbon biosequestration, temporarily removes carbon from active cycling and has thus far absorbed a substantial fraction of anthropogenic carbon emissions.

Graber, J.; Amthor, J.; Dahlman, R.; Drell, D.; Weatherwax, S.

2008-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "vast global cycle" 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

Motor vehicles and global warming  

SciTech Connect

Energy use in transportation is one of the contributors to the concern over global warming. The primary greenhouse gases released by the transportation sector are carbon dioxide and chlorofluorocarbons. When all greenhouse gases are considered, CO{sub 2} emissions from the operation of highway vehicles worldwide represent about 4.7% of global warming enhancement. CO{sub 2} emissions from U.S. highway vehicles along represent about 2 to 2.5% of worldwide greenhouse gases. The use of CFCs in automotive air conditioning, in blowing foams for seats and padding and in the manufacture of electronic circuit boards accounted for 15% of the global usage of CFC-12 in 1985 according to the U.S. EPA. The Motor Vehicle Manufacturers Association supports the phase-out of CFC use provided that safe substitutes are available and that adequate lead time is allowed for.They suggest that reduction of greenhouse gases would require planning on a global scope to be effective. One alternative they suggest for further study is a carbon fee for reducing emissions of carbon dioxide. This fee would be levied on each type of fossil fuel, proportional to its carbon content per unit of energy.

Halberstadt, M.L.

1990-03-01T23:59:59.000Z

362

RENEWABLES 2005 GLOBAL STATUS REPORT  

E-Print Network (OSTI)

Research Institute Chinese Renewable Energy Industries Association China Susan McDade Energy EnvironmentRENEWABLES 2005 GLOBAL STATUS REPORT Paper prepared for the REN21 Network by The Worldwatch Institute Lead Author: Eric Martinotwww.ren21.net #12;Renewable Energy Policy Network for the 21st Century

Kammen, Daniel M.

363

On globally Symmetric Finsler spaces  

E-Print Network (OSTI)

The paper consider the symmetric of Finsler spaces. We give some conditions about globally symmetric Finsler spaces. Then we prove that these spaces can be written as a coset space of Lie group with an invariant Finsler metric. Finally, we prove that such a space must be Berwaldian

Khatamy, R Chavosh

2011-01-01T23:59:59.000Z

364

Computer demonstration of an interactive modeling system for the study of global change and biogeochemistry  

SciTech Connect

There is a need for visually oriented materials to aid in the study of global ecological science. Analysis of the carbon cycle is key to understanding Potential climate change. We have used satellite imagery along with global climate and soil texture data sets to simulate seasonal patterns in net carbon fixation and soil CO[sub 2] production. An interactive computer system is used to illustrate graphical results from various model scenarios of climate warming and land use change. These include global animations of monthly gridded CO[sub 2] exchange between the atmosphere and the terrestrial biosphere. This modeling demonstration highlights the importance of annual CO[sub 2] fluxes in tropical forests (40% of global totals) and the large carbon storage potential in boreal and arctic soils.

Klooster, S.A.; Potter, S. (NASA-Ames Research Center, Moffett Field, CA (United States)); Randerson, J. (Carnegie Institution of Washington, Stanford, CA (United States))

1993-06-01T23:59:59.000Z

365

Title Adding Cycle Scavenging Support to the Koala Grid Resource Manager  

E-Print Network (OSTI)

Cycle scavenging (CS) is the process of using otherwise idle computational resources to provide large, aggregate, amounts of computational power. It is the core principle of so-called desktop grids and volunteer computing, which use the idle cycles of desktop computers to do computations. However, resources in a multicluster grid likewise may have idle time, and so, multi-cluster grids go through periods of low efficiency. In addition, many practical grid applications are of the Bag-of-Tasks (BoT) type, which are large collections of embarrassingly parallel tasks. These require a vast amount of computational power, which multi-cluster grids can provide. Claiming an entire grid for one application would however not be fair to other grid users. In this thesis, we design a system for multi-cluster grids that detects and uses otherwise idle resources, specifically to execute BoTs. By combining CS with the computational power of the grid, we increase grid efficiency, we are able to provide the resources needed by BoTs, and, at the same time, we can guarantee unobtrusiveness to all grid users. The system we design, KOALA-CS, is an extension of the KOALA grid resource manager. We create a framework

Bart Grundeken; Bart Grundeken; Msc Presentation

2009-01-01T23:59:59.000Z

366

MHD Integrated Topping Cycle Project  

DOE Green Energy (OSTI)

This eighteenth quarterly technical progress report of the MHD Integrated Topping cycle Project presents the accomplishments during the period November 1, 1991 to January 31, 1992. The precombustor is fully assembled. Manufacturing of all slagging stage components has been completed. All cooling panels were welded in place and the panel/shell gap was filled with RTV. Final combustor assembly is in progress. The low pressure cooling subsystem (LPCS) was delivered to the CDIF. Second stage brazing issues were resolved. The construction of the two anode power cabinets was completed.

Not Available

1992-07-01T23:59:59.000Z

367

Advanced Fuel Cycle Economic Sensitivity Analysis  

Science Conference Proceedings (OSTI)

A fuel cycle economic analysis was performed on four fuel cycles to provide a baseline for initial cost comparison using the Gen IV Economic Modeling Work Group G4 ECON spreadsheet model, Decision Programming Language software, the 2006 Advanced Fuel Cycle Cost Basis report, industry cost data, international papers, the nuclear power related cost study from MIT, Harvard, and the University of Chicago. The analysis developed and compared the fuel cycle cost component of the total cost of energy for a wide range of fuel cycles including: once through, thermal with fast recycle, continuous fast recycle, and thermal recycle.

David Shropshire; Kent Williams; J.D. Smith; Brent Boore

2006-12-01T23:59:59.000Z

368

Current Forecast for Sunspot Cycle 24 Parameters  

Science Conference Proceedings (OSTI)

Our prediction for the development of sunspot cycle 23 activity came true; one of the very few to have attained this status. We use the 3?cycle quasi?periodicity observed in the planetary index Ap. We improve our method by including data for 150 years and draw inferences as to what to expect for the development phase of cycle 24. Our forecast for the smoothed sunspot number at cycle 24 peak 78±5 in June 2013; the possibility that next three cycles may be progressively less active cannot be ruled out; the trend may possibly continue for the rest of the 21st century.

H. S. Ahluwalia; R. C. Ygbuhay

2010-01-01T23:59:59.000Z

369

The FIT Model - Fuel-cycle Integration and Tradeoffs  

Science Conference Proceedings (OSTI)

All mass streams from fuel separation and fabrication are products that must meet some set of product criteria – fuel feedstock impurity limits, waste acceptance criteria (WAC), material storage (if any), or recycle material purity requirements such as zirconium for cladding or lanthanides for industrial use. These must be considered in a systematic and comprehensive way. The FIT model and the “system losses study” team that developed it [Shropshire2009, Piet2010] are an initial step by the FCR&D program toward a global analysis that accounts for the requirements and capabilities of each component, as well as major material flows within an integrated fuel cycle. This will help the program identify near-term R&D needs and set longer-term goals. The question originally posed to the “system losses study” was the cost of separation, fuel fabrication, waste management, etc. versus the separation efficiency. In other words, are the costs associated with marginal reductions in separations losses (or improvements in product recovery) justified by the gains in the performance of other systems? We have learned that that is the wrong question. The right question is: how does one adjust the compositions and quantities of all mass streams, given uncertain product criteria, to balance competing objectives including cost? FIT is a method to analyze different fuel cycles using common bases to determine how chemical performance changes in one part of a fuel cycle (say used fuel cooling times or separation efficiencies) affect other parts of the fuel cycle. FIT estimates impurities in fuel and waste via a rough estimate of physics and mass balance for a set of technologies. If feasibility is an issue for a set, as it is for “minimum fuel treatment” approaches such as melt refining and AIROX, it can help to make an estimate of how performances would have to change to achieve feasibility.

Steven J. Piet; Nick R. Soelberg; Samuel E. Bays; Candido Pereira; Layne F. Pincock; Eric L. Shaber; Meliisa C Teague; Gregory M Teske; Kurt G Vedros

2010-09-01T23:59:59.000Z

370

PNNL: Atmospheric Sciences & Global Change - Frontiers in Global Change  

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

Frontiers in Global Change Frontiers in Global Change Dr. Thanos Nenes Dr. Thanos Nenes Aerosol-Cloud Interactions: The Elusive Component of Climate Change Dr. Thanos Nenes Professor & Georgia Power Faculty Scholar, School of Earth & Atmospheric Sciences, School of Chemical & Biomolecular Engineering, Georgia Institute of Technology, Atlanta, GA Thursday, August 1, 2013 EMSL Auditorium 10:00AM The effect of human activities on climate is one of the most important issues facing society. Humans influence climate in many ways. Emissions of greenhouse gases (GHGs) tend to warm climate, by reducing the amount of infrared radiation that is emitted to space. Increased levels of suspended atmospheric particles ("aerosols") exert a net cooling effect by directly scattering and absorption of solar radiation (the "aerosol direct climatic

371

Anthropogenic impacts on global storage and emissions of mercury from terrestrial soils: Insights from a new global  

E-Print Network (OSTI)

[1] We develop a mechanistic global model of soil mercury storage and emissions that ties the lifetime of mercury in soils to the lifetime of the organic carbon pools it is associated with. We explore the implications of considering terrestrial mercury cycling in the framework of soil carbon cycling and suggest possible avenues of future research to test our assumptions and constrain this type of model. In our simulation, input of mercury to soil is by atmospheric deposition, in part through leaf uptake and subsequent litter fall, and is moderated by surface photoreduction and revolatilization. Once bound to organic carbon, mercury is transferred along a succession of short?lived to long?lived carbon pools and is ultimately reemitted by respiration of these pools. We examine the legacy of anthropogenic influence on global mercury storage and emissions and estimate that storage of mercury in organic soils has increased by ?20 % since preindustrial times, while soil emissions have increased by a factor of 3 (2900 Mg yr ?1 versus 1000 Mg yr ?1). At steady state, mercury accumulates in the most recalcitrant soil carbon pools and has an overall lifetime against respiration of 630 years. However, the impact of anthropogenic emissions since preindustrial times has been concentrated in more labile pools, so that the mean lifetime of present?day anthropogenic mercury in all pools is ?80 years. Our analysis suggests that reductions in anthropogenic emissions would lead to immediate and large reductions in secondary soil mercury emissions.

Nicole V Smith?downey; Elsie M. Sunderl; Daniel J. Jacob

2010-01-01T23:59:59.000Z

372

Conceptual design of an advanced absorption cycle: the double-effect regenerative absorption refrigeration cycle  

DOE Green Energy (OSTI)

An advanced absorption refrigeration cycle was proposed as a heat-activated refrigeration system. Referred to as the double-effect regenerative absorption cycle of cycle 2R, it improves the performance of the conventional single-effect absorption cycle at high heat source temperatures. The performance of cycle 2R continually improves as input temperatures rise, in contrast to the conventional double-effect absorption cycle that has a sharp cut-off temperature below which it ceases to operate. Cycle 2R operates with two subcycles, the first-effect and the second-effect subcycles.

Dao, K.

1978-09-01T23:59:59.000Z

373

MHD Integrated Topping Cycle Project  

DOE Green Energy (OSTI)

The overall objective of the project is to design and construct prototypical hardware for an integrated MHD topping cycle, and conduct long duration proof-of-concept tests of integrated system at the US DOE Component Development and Integration Facility in Butte, Montana. The results of the long duration tests will augment the existing engineering design data base on MHD power train reliability, availability, maintainability, and performance, and will serve as a basis for scaling up the topping cycle design to the next level of development, an early commercial scale power plant retrofit. The components of the MHD power train to be designed, fabricated, and tested include: A slagging coal combustor with a rated capacity of 50 MW thermal input, capable of operation with an Eastern (Illinois {number sign}6) or Western (Montana Rosebud) coal, a segmented supersonic nozzle, a supersonic MHD channel capable of generating at least 1.5 MW of electrical power, a segmented supersonic diffuser section to interface the channel with existing facility quench and exhaust systems, a complete set of current control circuits for local diagonal current control along the channel, and a set of current consolidation circuits to interface the channel with the existing facility inverter.

Not Available

1992-01-01T23:59:59.000Z

374

Technology development life cycle processes.  

SciTech Connect

This report and set of appendices are a collection of memoranda originally drafted in 2009 for the purpose of providing motivation and the necessary background material to support the definition and integration of engineering and management processes related to technology development. At the time there was interest and support to move from Capability Maturity Model Integration (CMMI) Level One (ad hoc processes) to Level Three. As presented herein, the material begins with a survey of open literature perspectives on technology development life cycles, including published data on %E2%80%9Cwhat went wrong.%E2%80%9D The main thrust of the material presents a rational expose%CC%81 of a structured technology development life cycle that uses the scientific method as a framework, with further rigor added from adapting relevant portions of the systems engineering process. The material concludes with a discussion on the use of multiple measures to assess technology maturity, including consideration of the viewpoint of potential users.

Beck, David Franklin

2013-05-01T23:59:59.000Z

375

MHD Integrated Topping Cycle Project  

DOE Green Energy (OSTI)

The Magnetohydrodynamics (MHD) Integrated Topping Cycle (ITC) Project represents the culmination of the proof-of-concept (POC) development stage in the US Department of Energy (DOE) program to advance MHD technology to early commercial development stage utility power applications. The project is a joint effort, combining the skills of three topping cycle component developers: TRW, Avco/TDS, and Westinghouse. TRW, the prime contractor and system integrator, is responsible for the 50 thermal megawatt (50 MW{sub t}) slagging coal combustion subsystem. Avco/TDS is responsible for the MHD channel subsystem (nozzle, channel, diffuser, and power conditioning circuits), and Westinghouse is responsible for the current consolidation subsystem. The ITC Project will advance the state-of-the-art in MHD power systems with the design, construction, and integrated testing of 50 MW{sub t} power train components which are prototypical of the equipment that will be used in an early commercial scale MHD utility retrofit. Long duration testing of the integrated power train at the Component Development and Integration Facility (CDIF) in Butte, Montana will be performed, so that by the early 1990's, an engineering data base on the reliability, availability, maintainability and performance of the system will be available to allow scaleup of the prototypical designs to the next development level. This Sixteenth Quarterly Technical Progress Report covers the period May 1, 1991 to July 31, 1991.

Not Available

1992-03-01T23:59:59.000Z

376

Fuel Cycle CrossCut Group  

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

CrossCut Group CrossCut Group 1 NERAC Briefing: Assessment of Dose of Closed vs Open Gen-IV Fuel Cycles David Wade NERAC Meeting September 30, 2002 Fuel Cycle CrossCut Group 2 Public Dose and Worker Dose Comparison of Open vs Closed Fuel Cycles * Gen-IV fuel cycle options are meant to address all stated Gen-IV Goals - Dose to workers and to the public is one of the numerous elements to be evaluated by Gen-IV R&D - The Fuel Cycle Crosscut Group was assigned to take an early look at dose implication tradeoffs of open and closed fuel cycles * FCCG Interpretation of Assignment: - Collect already-existing evaluations and prepare a briefing on what is currently known Fuel Cycle CrossCut Group 3 Approach * Look at Actual Historical Doses Based on Operational Experience - Data compiled by the United Nations Scientific Committee on the Effects of Atomic

377

VISION: Verifiable Fuel Cycle Simulation Model  

Science Conference Proceedings (OSTI)

The nuclear fuel cycle is a very complex system that includes considerable dynamic complexity as well as detail complexity. In the nuclear power realm, there are experts and considerable research and development in nuclear fuel development, separations technology, reactor physics and waste management. What is lacking is an overall understanding of the entire nuclear fuel cycle and how the deployment of new fuel cycle technologies affects the overall performance of the fuel cycle. The Advanced Fuel Cycle Initiative’s systems analysis group is developing a dynamic simulation model, VISION, to capture the relationships, timing and delays in and among the fuel cycle components to help develop an understanding of how the overall fuel cycle works and can transition as technologies are changed. This paper is an overview of the philosophy and development strategy behind VISION. The paper includes some descriptions of the model and some examples of how to use VISION.

Jacob J. Jacobson; Abdellatif M. Yacout; Gretchen E. Matthern; Steven J. Piet; David E. Shropshire

2009-04-01T23:59:59.000Z

378

Definition: Brayton cycle | 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 Definition Edit with form History Facebook icon Twitter icon » Definition: Brayton cycle Jump to: navigation, search Dictionary.png Brayton cycle A thermodynamic cycle using constant pressure, heat addition and rejection. Fuel and a compressor are used to heat and increase the pressure of a gas; the gas expands and spins the blades of a turbine, which, when connected to a generator, generates electricity.[1][2] View on Wikipedia Wikipedia Definition The Brayton cycle is a thermodynamic cycle that describes the workings of a constant pressure heat engine. Gas turbine engines and airbreathing jet engines use the Brayton Cycle. Although the Brayton cycle

379

Fuel Cycle Research and Development Program  

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

Development Program Presentation to Office of Environmental Management Tank Waste Corporate Board James C. Bresee, ScD, JD Advisory Board Member Office of Nuclear Energy July 29, 2009 July 29, 2009 Fuel Cycle Research and Development DM 195665 2 Outline Fuel Cycle R&D Mission Changes from the Former Advanced Fuel Cycle Initiative The Science-Based Approach Key Collaborators Budget History Program Elements Summary July 29, 2009 Fuel Cycle Research and Development DM 195665 3 Fuel Cycle R&D Mission The mission of Fuel Cycle Research and Development is to develop options to current fuel cycle management strategy to enable the safe, secure, economic, and sustainable expansion of nuclear energy while reducing proliferation risks by conducting

380

partnership profile: the global fund | 1 About the Global Fund to Fight AIDS,  

E-Print Network (OSTI)

and Malaria The Global Fund to Fight aIDS, Tuberculosis and Malaria (Global Fund) is a global public-private international disbursements in 2010. as a public-private partnership representing governments, civil society

Derisi, Joseph

Note: This page contains sample records for the topic "vast global cycle" 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

Open-cycle OTEC system performance analysis. [Claude cycle  

DOE Green Energy (OSTI)

An algorithm developed to calculate the performance of Claude-Cycle ocean thermal energy conversion (OTEC) systems is described. The algorithm treats each component of the system separately and then interfaces them to form a complete system, allowing a component to be changed without changing the rest of the algorithm. Two components that are subject to change are the evaporator and condenser. For this study we developed mathematical models of a channel-flow evaporator and both a horizontal jet and spray director contact condenser. The algorithm was then programmed to run on SERI's CDC 7600 computer and used to calculate the effect on performance of deaerating the warm and cold water streams before entering the evaporator and condenser, respectively. This study indicates that there is no advantage to removing air from these streams compared with removing the air from the condenser.

Lewandowski, A.A.; Olson, D.A.; Johnson, D.H.

1980-10-01T23:59:59.000Z

382

Diurnal Cycle of Water Vapor as Documented by a Dense GPS Network in a Coastal Area during ESCOMPTE IOP2  

Science Conference Proceedings (OSTI)

Global positioning system (GPS) data from a dense network have been used for the analysis of the diurnal cycle of water vapor over Marseille, France, during the second intensive observation period (IOP2; 21–26 June 2001) of the Expérience sur ...

Sophie Bastin; Cédric Champollion; Olivier Bock; Philippe Drobinski; Frédéric Masson

2007-02-01T23:59:59.000Z

383

Global Nuclear Energy Partnership Programmatic Environmental Impact Statement  

SciTech Connect

Abstract: The proposed Global Nuclear Energy Partnership (GNEP) Program, which is part of the President’s Advanced Energy Initiative, is intended to support a safe, secure, and sustainable expansion of nuclear energy, both domestically and internationally. Domestically, the GNEP Program would promote technologies that support economic, sustained production of nuclear-generated electricity, while reducing the impacts associated with spent nuclear fuel disposal and reducing proliferation risks. The Department of Energy (DOE) proposed action envisions changing the United States nuclear energy fuel cycle from an open (or once-through) fuel cycle—in which nuclear fuel is used in a power plant one time and the resulting spent nuclear fuel is stored for eventual disposal in a geologic repository—to a closed fuel cycle in which spent nuclear fuel would be recycled to recover energy-bearing components for use in new nuclear fuel. At this time, DOE has no specific proposed actions for the international component of the GNEP Program. Rather, the United States, through the GNEP Program, is considering various initiatives to work cooperatively with other nations. Such initiatives include the development of grid-appropriate reactors and the development of reliable fuel services (to provide an assured supply of fresh nuclear fuel and assist with the management of the used fuel) for nations who agree to employ nuclear energy only for peaceful purposes, such as electricity generation.

R.A. Wigeland

2008-10-01T23:59:59.000Z

384

Transitional solar dynamics, cosmic rays and global warming  

E-Print Network (OSTI)

Solar activity is studied using a cluster analysis of the time-fluctuations of the sunspot number. It is shown that in an Historic period the high activity components of the solar cycles exhibit strong clustering, whereas in a Modern period (last seven solar cycles: 1933-2007) they exhibit a white-noise (non-)clustering behavior. Using this observation it is shown that in the Historic period, emergence of the sunspots in the solar photosphere was strongly dominated by turbulent photospheric convection. In the Modern period, this domination was broken by a new more active dynamics of the inner layers of the convection zone. Then, it is shown that the dramatic change of the sun dynamics at the transitional period (between the Historic and Modern periods, solar cycle 1933-1944yy) had a clear detectable impact on Earth climate. A scenario of a chain of transitions in the solar convective zone is suggested in order to explain the observations, and a forecast for the global warming is suggested on the basis of this scenario. A relation between the recent transitions and solar long-period chaotic dynamics has been found. Contribution of the galactic turbulence (due to galactic cosmic rays) has been discussed. These results are also considered in a content of chaotic climate dynamics at millennial timescales.

A. Bershadskii

2008-05-14T23:59:59.000Z

385

Global Change Research: Summaries of research in FY 1993  

SciTech Connect

This document describes the activities and products of the Global Research Program in FY 1993. This publication describes all of the projects funded by the Environmental Sciences Division of DOE under annual contracts, grants, and interagency agreements in FY 1993. Each description contains the project`s title; its 3-year funding history (in thousands of dollars); the period over which the funding applies; the name(s) of the principal investigator(s); the institution(s) conducting the projects; and the project`s objectives, products, approach, and results to date (for most projects older than 1 year). Project descriptions are categorized within the report according to program areas: climate modeling, quantitative links, global carbon cycle, vegetation research, ocean research, economics of global climate change, education, information and integration, and NIGEC. Within these categories, the descriptions are grouped alphabetically by principal investigator. Each program area is preceded by a brief text that defines the program area, states its goals and objectives, lists principal research questions, and identifies program managers.

Not Available

1993-10-01T23:59:59.000Z

386

Global Warming: some back-of-the-envelope calculations  

E-Print Network (OSTI)

We do several simple calculations and measurements in an effort to gain understanding of global warming and the carbon cycle. Some conclusions are interesting: (i) There has been global warming since the end of the "little ice age" around 1700. There is no statistically significant evidence of acceleration of global warming since 1940. (ii) The increase of CO_2 in the atmosphere, beginning around 1940, accurately tracks the burning of fossil fuels. Burning all of the remaining economically viable reserves of oil, gas and coal over the next 150 years or so will approximately double the pre-industrial atmospheric concentration of CO_2. The corresponding increase in the average temperature, due to the greenhouse effect, is quite uncertain: between 1.3 and 4.8K. This increase of temperature is (partially?) offset by the increase of aerosols and deforestation. (iii) Ice core samples indicate that the pre-historic CO_2 concentration and temperature are well correlated. We conclude that changes in the temperatures o...

Fabara, C

2005-01-01T23:59:59.000Z

387

Global warming continues in 1989  

SciTech Connect

Nineteen eight-nine ranks as one of the warmest years on record despite the chill of unusually cool water in the tropical Pacific. The continued robustness of the warming trend that began in the mid-1970s lends support to claims that an intensifying greenhouse effect is behind it all, although that case has not yet been made definitively. Even at the current rate of global warming it will take another 10 years or so to be confident that the greenhouse effect is with us. Although the global warming trend is consistent with an increasing contribution by the greenhouse effect, direct signs that the greenhouse effect is intensifying are still hard to come by in the temperature record. Greenhouse models agree that if that is happening, the temperature increase should be most pronounced around the Arctic. Alaska, northwestern Canada, and northern Siberia warmed sharply in the 1980s, but the region from eastern Canada through Greenland and into Scandinavia cooled markedly.

Kerr, R.A.

1990-02-02T23:59:59.000Z

388

Carbon dioxide and global change  

SciTech Connect

This book presents an analysis and review of the many potential consequences of the rapidly rising CO{sub 2} content of Earth's atmosphere. Covering both the physical (climatic) and biological effects of atmospheric CO{sub 2} enrichment, the book presents an overview of the interrelated aspects of this complex and demanding subject. Focus is on the search for evidence of global warming (the highly speculative climatic greenhouse effect) and global vegetative stimulation (the well established biological greenhouse effect). The pros and cons of all issues related to these phenomena are discussed. The author's estimate of where the world is headed as a result of mankind's great geophysical experiments is offered.

Idso, S.B. (Arizona State Univ. (US))

1989-01-01T23:59:59.000Z

389

global horizontal | OpenEI  

Open Energy Info (EERE)

87 87 Varnish cache server Browse Upload data GDR 429 Throttled (bot load) Error 429 Throttled (bot load) Throttled (bot load) Guru Meditation: XID: 2142278787 Varnish cache server global horizontal Dataset Summary Description (Abstract): Documentation of the satellite-based high resolution solar resource assessment for Ghana provided by DLR. The high resolution solar data (10kmx10km) provide country maps of the annual and monthly sums of hourly global horizontal and direct normal irradiance (GHI and DNI) for the year 2000, 2001 and 2002. Additionally, for selected sites hourly values of GHI and DNI are provided.The Documentation gives an overview about the used input data and used methodology, shows example maps and describes a comparison with ground data (if provided by the country)

390

Global Technology Regulation and Potentially  

E-Print Network (OSTI)

In 2000 Bill Joy proposed that the best way to prevent technological apocalypse was to "relinquish " emerging bio-, info- and nanotechnologies. His essay introduced many watchdog groups to the dangers that futurists had been warning of for decades. One such group, ETC, has called for a moratorium on all nanotechnological research until all safety issues can be investigated and social impacts ameliorated. In this essay I discuss the differences and similarities of regulating bio- and nanotechnological innovation to the efforts to regulate nuclear and biological weapons of mass destruction. I then suggest the creation of a global technology regulatory regime to ensure the safe and equitable diffusion of genetic, molecular and information technologies, and point out the principal political obstacles to implementing such a regime. Global Technology Regulation James J. Hughes 2

Fritz Allhoff; Patrick Lin; James Moor; John Weckert; J. Hughes Ph. D

2007-01-01T23:59:59.000Z

391

Fuel Cycle Analysis Framework Base Cases for the IAEA/INPRO GAINS Collaborative Project  

SciTech Connect

Thirteen countries participated in the Collaborative Project GAINS “Global Architecture of Innovative Nuclear Energy Systems Based on Thermal and Fast Reactors Including a Closed Fuel Cycle”, which was the primary activity within the IAEA/INPRO Program Area B: “Global Vision on Sustainable Nuclear Energy” for the last three years. The overall objective of GAINS was to develop a standard framework for assessing future nuclear energy systems taking into account sustainable development, and to validate results through sample analyses. This paper details the eight scenarios that constitute the GAINS framework base cases for analysis of the transition to future innovative nuclear energy systems. The framework base cases provide a reference for users of the framework to start from in developing and assessing their own alternate systems. Each base case is described along with performance results against the GAINS sustainability evaluation metrics. The eight cases include four using a moderate growth projection and four using a high growth projection for global nuclear electricity generation through 2100. The cases are divided into two sets, addressing homogeneous and heterogeneous scenarios developed by GAINS to model global fuel cycle strategies. The heterogeneous world scenario considers three separate nuclear groups based on their fuel cycle strategies, with non-synergistic and synergistic cases. The framework base case analyses results show the impact of these different fuel cycle strategies while providing references for future users of the GAINS framework. A large number of scenario alterations are possible and can be used to assess different strategies, different technologies, and different assumptions about possible futures of nuclear power. Results can be compared to the framework base cases to assess where these alternate cases perform differently versus the sustainability indicators.

Brent Dixon

2012-09-01T23:59:59.000Z

392

CoalFleet RD&D Augmentation Plan for Integrated Gasification Combined Cycle (IGCC) Power Plants  

Science Conference Proceedings (OSTI)

Advanced, clean coal technologies such as integrated gasification combined cycle (IGCC) offer societies around the world the promise of efficient, affordable power generation at markedly reduced levels of emissions8212including "greenhouse gases" linked to global climate change8212relative to today's current fleet of coal-fired power plants. To help accelerate the development, demonstration, and market introduction of IGCC and other clean coal technologies, EPRI formed the CoalFleet for Tomorrow initiati...

2007-01-24T23:59:59.000Z

393

Answering Key Fuel Cycle Questions  

Science Conference Proceedings (OSTI)

The Advanced Fuel Cycle Initiative (AFCI) program has both “outcome” and “process” goals because it must address both waste already accumulating as well as completing the fuel cycle in connection with advanced nuclear power plant concepts. The outcome objectives are waste geological repository capacity and cost, energy security and sustainability, proliferation resistance, fuel cycle economics, and safety. The process objectives are readiness to proceed and adaptability and robustness in the face of uncertainties. A classic decision-making approach to such a multi-attribute problem would be to weight individual quantified criteria and calculate an overall figure of merit. This is inappropriate for several reasons. First, the goals are not independent. Second, the importance of different goals varies among stakeholders. Third, the importance of different goals is likely to vary with time, especially the “energy future.” Fourth, some key considerations are not easily or meaningfully quantifiable at present. Instead, at this point, we have developed 16 questions the AFCI program should answer and suggest an approach of determining for each whether relevant options improve meeting each of the program goals. We find that it is not always clear which option is best for a specific question and specific goal; this helps identify key issues for future work. In general, we suggest attempting to create as many win-win decisions (options that are attractive or neutral to most goals) as possible. Thus, to help clarify why the program is exploring the options it is, and to set the stage for future narrowing of options, we have developed 16 questions, as follows: · What are the AFCI program goals? · Which potential waste disposition approaches do we plan for? · What are the major separations, transmutation, and fuel options? · How do we address proliferation resistance? · Which potential energy futures do we plan for? · What potential external triggers do we plan for? · Should we separate uranium? · If we separate uranium, should we recycle it, store it or dispose of it? · Is it practical to plan to fabricate and handle “hot” fuel? · Which transuranic elements (TRU) should be separated and transmuted? · Of those TRU separated, which should be transmuted together? · Should we separate and/or transmute Cs and Sr isotopes that dominate near-term repository heating? · Should we separate and/or transmute very long-lived Tc and I isotopes? · Which separation technology? · What mix of transmutation technologies? · What fuel technology best supports the above decisions?

Steven J. Piet; Brent W. Dixon; J. Stephen Herring; David E. Shropshire; Mary Lou Dunzik-Gougar

2003-10-01T23:59:59.000Z

394

Fuel Cycle System Analysis Handbook  

Science Conference Proceedings (OSTI)

This Handbook aims to improve understanding and communication regarding nuclear fuel cycle options. It is intended to assist DOE, Campaign Managers, and other presenters prepare presentations and reports. When looking for information, check here. The Handbook generally includes few details of how calculations were performed, which can be found by consulting references provided to the reader. The Handbook emphasizes results in the form of graphics and diagrams, with only enough text to explain the graphic, to ensure that the messages associated with the graphic is clear, and to explain key assumptions and methods that cause the graphed results. Some of the material is new and is not found in previous reports, for example: (1) Section 3 has system-level mass flow diagrams for 0-tier (once-through), 1-tier (UOX to CR=0.50 fast reactor), and 2-tier (UOX to MOX-Pu to CR=0.50 fast reactor) scenarios - at both static and dynamic equilibrium. (2) To help inform fast reactor transuranic (TRU) conversion ratio and uranium supply behavior, section 5 provides the sustainable fast reactor growth rate as a function of TRU conversion ratio. (3) To help clarify the difference in recycling Pu, NpPu, NpPuAm, and all-TRU, section 5 provides mass fraction, gamma, and neutron emission for those four cases for MOX, heterogeneous LWR IMF (assemblies mixing IMF and UOX pins), and a CR=0.50 fast reactor. There are data for the first 10 LWR recycle passes and equilibrium. (4) Section 6 provides information on the cycle length, planned and unplanned outages, and TRU enrichment as a function of fast reactor TRU conversion ratio, as well as the dilution of TRU feedstock by uranium in making fast reactor fuel. (The recovered uranium is considered to be more pure than recovered TRU.) The latter parameter impacts the required TRU impurity limits specified by the Fuels Campaign. (5) Section 7 provides flows for an 800-tonne UOX separation plant. (6) To complement 'tornado' economic uncertainty diagrams, which show at a glance combined uncertainty information, section 9.2 has a new set of simpler graphs that show the impact on fuel cycle costs for once through, 1-tier, and 2-tier scenarios as a function of key input parameters.

Steven J. Piet; Brent W. Dixon; Dirk Gombert; Edward A. Hoffman; Gretchen E. Matthern; Kent A. Williams

2009-06-01T23:59:59.000Z

395

Global Warming in Geologic Time  

Science Conference Proceedings (OSTI)

The notion is pervasive in the climate science community and in the public at large that the climate impacts of fossil fuel CO2 release will only persist for a few centuries. This conclusion has no basis in theory or models of the atmosphere/ ocean carbon cycle, which we review here. The largest fraction of the CO2 recovery will take place on time scales of centuries, as CO2 invades the ocean, but a significant fraction of the fossil fuel CO2, ranging in published models in the literature from 20-60%, remains airborne for a thousand years or longer. Ultimate recovery takes place on time scales of hundreds of thousands of years, a geologic longevity typically associated in public perceptions with nuclear waste. The glacial/interglacial climate cycles demonstrate that ice sheets and sea level respond dramatically to millennial-timescale changes in climate forcing. There are also potential positive feedbacks in the carbon cycle, including methane hydrates in the ocean, and peat frozen in permafrost, that are most sensitive to the long tail of the fossil fuel CO2 in the atmosphere.

Archer, David (University of Chicago)

2008-02-27T23:59:59.000Z

396

Implementation of global energy sustainability  

SciTech Connect

The term energy sustainability emerged from the UN Conference on Environment and Development in Rio 1992, when Agenda 21 was formulated and the Global Energy Charter proclaimed. Emission reductions, total energy costing, improved energy efficiency, and sustainable energy systems are the four fundamental principles of the charter. These principles can be implemented in the proposed financial, legal, technical, and education framework. Much has been done in many countries toward the implementation of the Global Energy Charter, but progress has not been fast enough to ease the disastrous effects of the too many ill-conceived energy systems on the environment, climate, and health. Global warming is accelerating, and pollution is worsening, especially in developing countries with their hunger for energy to meet the needs of economic development. Asian cities are now beating all pollution records, and greenhouse gases are visibly changing the climate with rising sea levels, retracting glaciers, and record weather disasters. This article presents why and how energy investments and research money have to be rechanneled into sustainable energy, rather than into the business-as-usual of depleting, unsustainable energy concepts exceeding one trillion dollars per year. This largest of all investment sectors needs much more attention.

Grob, G.R. [CMDC, Zurich (Switzerland)

1998-02-01T23:59:59.000Z

397

Battery charging in float vs. cycling environments  

SciTech Connect

In lead-acid battery systems, cycling systems are often managed using float management strategies. There are many differences in battery management strategies for a float environment and battery management strategies for a cycling environment. To complicate matters further, in many cycling environments, such as off-grid domestic power systems, there is usually not an available charging source capable of efficiently equalizing a lead-acid battery let alone bring it to a full state of charge. Typically, rules for battery management which have worked quite well in a floating environment have been routinely applied to cycling batteries without full appreciation of what the cycling battery really needs to reach a full state of charge and to maintain a high state of health. For example, charge target voltages for batteries that are regularly deep cycled in off-grid power sources are the same as voltages applied to stand-by systems following a discharge event. In other charging operations equalization charge requirements are frequently ignored or incorrectly applied in cycled systems which frequently leads to premature capacity loss. The cause of this serious problem: the application of float battery management strategies to cycling battery systems. This paper describes the outcomes to be expected when managing cycling batteries with float strategies and discusses the techniques and benefits for the use of cycling battery management strategies.

COREY,GARTH P.

2000-04-20T23:59:59.000Z

398

Business cycles in oil economies  

SciTech Connect

This study examines the impact of oil price shocks on output fluctuations of several oil-exporting economies. In most studies of business cycles, the role of oil price is ignored; the few studies that use oil price as one of the variables in the system focus on modeling oil-importing economies. The vector autoregression (VAR) technique is used to consider the cases of Norway, Nigeria, and Mexico. Both atheoretical and structural' VARs are estimated to determine the importance of oil price impulses on output variations. The study reports two types of results: variance decomposition and impulse response functions, with particular emphasis on the issues of stationarity and co-integration among the series. The empirical results suggest that shocks to oil price are important in explaining output variations. In most cases, shocks to oil price are shown to explain more than 20% of the forecast variance of output over a 40-quarter horizon.

Al-Mutairi, N.H.

1991-01-01T23:59:59.000Z

399

Efficiency combined cycle power plant  

SciTech Connect

This patent describes a method of operating a combined cycle power plant. It comprises: flowing exhaust gas from a combustion turbine through a heat recovery steam generator (HRSG); flowing feed water through an economizer section of the HRSG at a flow rate and providing heated feed water; flowing a first portion of the heated feed water through an evaporator section of the HRSG and producing saturated steam at a production rate, the flow rate of the feed water through the economizer section being greater than required to sustain the production rate of steam in the evaporator section; flowing fuel for the turbine through a heat exchanger; and, flowing a second portion of the heated feed water provided by the economizer section through the heat exchanger then to an inlet of the economizer section, thereby heating the fuel flowing through the heat exchanger.

Pavel, J.; Meyers, G.A.; Baldwin, T.S.

1990-06-12T23:59:59.000Z

400

Pennsylvania life cycle costing manual  

SciTech Connect

Until the 1970s, it was commonplace for institutions and governments to purchase equipment based on lowest initial (first) costs. Recurring costs such as operational, maintenance, and energy costs often were not considered in the purchase decision. If an agency wanted to buy something, it published specifications and requested bids from several manufacturers. Often, the lowest bidder who met the specifications won the job, with no consideration given to the economic life of the equipment or yearly recurring costs such as energy and maintenance costs. The practice of purchasing based on lowest initial costs probably did not make good economic sense prior to 1970, and it certainly does not make good sense now. The wise person will consider all costs and benefits associated with a purchase, both initial and post-purchase, in order to make procurement decisions that are valid for the life of the equipment. This describes a method of financial analysis that considers all pertinent costs: life cycle costing (LCC).

1996-02-01T23:59:59.000Z

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


401

MHD Integrated Topping Cycle Project  

DOE Green Energy (OSTI)

This seventeenth quarterly technical progress report of the MHD Integrated Topping Cycle Project presents the accomplishments during the period August 1, 1991 to October 31, 1991. Manufacturing of the prototypical combustor pressure shell has been completed including leak, proof, and assembly fit checking. Manufacturing of forty-five cooling panels was also completed including leak, proof, and flow testing. All precombustor internal components (combustion can baffle and swirl box) were received and checked, and integration of the components was initiated. A decision was made regarding the primary and backup designs for the 1A4 channel. The assembly of the channel related prototypical hardware continued. The cathode wall electrical wiring is now complete. The mechanical design of the diffuser has been completed.

Not Available

1992-07-01T23:59:59.000Z

402

Effects of solar UV radiation and climate change on biogeochemical cycling: Interactions and feedbacks  

SciTech Connect

Solar UV radiation, climate and other drivers of global change are undergoing significant changes and models forecast that these changes will continue for the remainder of this century. Here we assess the effects of solar UV radiation on biogeochemical cycles and the interactions of these effects with climate change, including feedbacks on climate. Such interactions occur in both terrestrial and aquatic ecosystems. While there is significant uncertainty in the quantification of these effects, they could accelerate the rate of atmospheric CO{sub 2} increase and subsequent climate change beyond current predictions. The effects of predicted changes in climate and solar UV radiation on carbon cycling in terrestrial and aquatic ecosystems are expected to vary significantly between regions. The balance of positive and negative effects on terrestrial carbon cycling remains uncertain, but the interactions between UV radiation and climate change are likely to contribute to decreasing sink strength in many oceanic regions. Interactions between climate and solar UV radiation will affect cycling of elements other than carbon, and so will influence the concentration of greenhouse and ozone-depleting gases. For example, increases in oxygen-deficient regions of the ocean caused by climate change are projected to enhance the emissions of nitrous oxide, an important greenhouse and ozone-depleting gas. Future changes in UV-induced transformations of aquatic and terrestrial contaminants could have both beneficial and adverse effects. Taken in total, it is clear that the future changes in UV radiation coupled with human-caused global change will have large impacts on biogeochemical cycles at local, regional and global scales.

Erickson III, David J [ORNL

2011-01-01T23:59:59.000Z

403

Global Change Research Act of 1990  

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

Global Change Research Act of 1990 Print E-mail Global Change Research Act of 1990 Print E-mail The U.S. Global Change Research Program (USGCRP) was established by Presidential initiative in 1989 and mandated by Congress in the Global Change Research Act (GCRA) of 1990 in order to "assist the nation and the world to understand, assess, predict, and respond to human-induced and natural processes of global change." In consultation with White House officials and the Subcommittee on Global Change Research (SGCR), USGCRP's Executive Director ensures that the Program meets all mandated requirements which are summarized in the table below. Global Change Research Act of 1990 Requirements Please click on the buttons below for further details about the Global Change Research Act of 1990. Public Law 101-606(11/16/90) 104 Stat. 3096-3104

404

Change in Global Temperature: A Statistical Analysis  

Science Conference Proceedings (OSTI)

This paper investigates several issues relating to global climatic change using statistical techniques that impose minimal restrictions on the data. The main findings are as follows: 1) The global temperature increase since the last century is a ...

Gordon R. Richards

1993-03-01T23:59:59.000Z

405

Human Footprints on the Global Environment  

E-Print Network (OSTI)

Footprints on the Global Environment. By Rosa A. Eugene,Footprints on the Global Environment. MIT Press, 2010. xi +of its own impact on the environment that surrounds its

Ferrara, Enzo

2011-01-01T23:59:59.000Z

406

Ardour Global Indexes LLC | Open Energy Information  

Open Energy Info (EERE)

Zip 10016 Product New-York based company that manages the Ardour Global Indexes, a set of alternative energy financial indicators. References Ardour Global Indexes LLC1 LinkedIn...

407

A Multinational Course on Global Climate Change  

Science Conference Proceedings (OSTI)

A novel multinational course on global climate change was developed by East Carolina University in collaboration with five international universities and the U.S. Department of State. This course was developed to help foster the global conversation needed ...

Rosana Nieto Ferreira; Andrew Herdman; Scott Curtis; Rosina Chia; Elmer Poe; Robert Thompson; Biwu Yang

2012-10-01T23:59:59.000Z

408

A University Perspective on Global Climate Modeling  

Science Conference Proceedings (OSTI)

Global atmospheric models are proliferating, in part because of the widespread availability of powerful computers. There are about two dozen global modeling groups at work in the United States today. These groups are put into four categories, ...

David A. Randall

1996-11-01T23:59:59.000Z

409

Re-embedding the global soul  

E-Print Network (OSTI)

This thesis proposes to "re-embed" the "global nomad" into the context of an increasingly globalized world at the room scale. I define re-embedding as the "plugging in" of social relationships to local contexts and their ...

Wang, Joy (Joy Yuk-Hwa), 1975-

2001-01-01T23:59:59.000Z

410

Defining and Estimating Global Mean Temperature Anomalies  

Science Conference Proceedings (OSTI)

Methods used to quantify temperature changes of the earth must he assessed relative to an appropriate definition of global mean temperature. In this paper, global mean temperature is defined and the adequacy of using weighted average anomalies to ...

Richard F. Gunst; Sabyasachi Basu; Robert Brunell

1993-07-01T23:59:59.000Z

411

Emerging Global Trends in Advanced Manufacturing  

Science Conference Proceedings (OSTI)

Page 1. Emerging Global Trends in Advanced Manufacturing Stephanie S. Shipp, Project Leader Nayanee Gupta Bhavya Lal ...

2013-07-31T23:59:59.000Z

412

Globally Solving Nonconvex Quadratic Programming Problems via ...  

E-Print Network (OSTI)

Mar 7, 2011 ... ARGONNE NATIONAL LABORATORY. 9700 South Cass Avenue. Argonne, Illinois 60439. Globally Solving Nonconvex Quadratic ...

413

The Seasonal Cycle over the United States and Mexico  

Science Conference Proceedings (OSTI)

The annual cycle occupies a unique position in the spectra of meteorological time series. This cycle and its first three harmonics are extracted from the series as a seasonal cycle. The distributions of the annual and seasonal cycles are studied ...

Vernon E. Kousky; S. Srivatsangam

1983-01-01T23:59:59.000Z

414

Energy-Optimal Scheduling in Low Duty Cycle Sensor Networks  

E-Print Network (OSTI)

Energy consumption of a wireless sensor node mainly depends on the amount of time the node spends in each of the high power active (e.g., transmit, receive) and low power sleep modes. It has been well established that in order to prolong node's lifetime the duty-cycle of the node should be low. However, low power sleep modes usually have low current draw but high energy cost while switching to the active mode with a higher current draw. In this work, we investigate a MaxWeightlike opportunistic sleep-active scheduling algorithm that takes into account time- varying channel and traffic conditions. We show that our algorithm is energy optimal in the sense that the proposed ESS algorithm can achieve an energy consumption which is arbitrarily close to the global minimum solution. Simulation studies are provided to confirm the theoretical results.

Aydin, Nursen; Ercetin, Ozgur

2011-01-01T23:59:59.000Z

415

Nuclear Fuel Cycle | Department of Energy  

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

Cycle Cycle Nuclear Fuel Cycle This is an illustration of a nuclear fuel cycle that shows the required steps to process natural uranium from ore for preparation for fuel to be loaded in nuclear reactors. This is an illustration of a nuclear fuel cycle that shows the required steps to process natural uranium from ore for preparation for fuel to be loaded in nuclear reactors. The mission of NE-54 is primarily focused on activities related to the front end of the nuclear fuel cycle which includes mining, milling, conversion, and enrichment. Uranium Mining Both "conventional" open pit, underground mining, and in situ techniques are used to recover uranium ore. In general, open pit mining is used where deposits are close to the surface and underground mining is used

416

NREL: Energy Analysis - Life Cycle Assessment Harmonization  

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

Life Cycle Assessment Harmonization Life Cycle Assessment Harmonization Life Cycle Greenhouse Gas Emissions from Electricity Generation (Fact Sheet) Cover of the Life Cycle Greenhouse Gas Emissions from Electricity Generation factsheet Download the Fact Sheet The U.S. Department of Energy enlisted NREL to review and "harmonize" life cycle assessments (LCA) of electricity generation technologies. Hundreds of assessments have been published, often with considerable variability in results. These variations in approach, while usually legitimate, hamper comparison across studies and pooling of published results. Learn more about life cycle assessments of energy technologies. By harmonizing this data, NREL seeks to reduce the uncertainty around estimates for environmental impacts of renewables and increase the value of

417

Definition: Thermodynamic cycle | Open Energy Information  

Open Energy Info (EERE)

Thermodynamic cycle Thermodynamic cycle Jump to: navigation, search Dictionary.png Thermodynamic cycle A process in which a fluid (water, air, ammonia, etc) successively changes state (from a liquid to a gas and back to a liquid) for the purpose of producing or transferring energy.[1] View on Wikipedia Wikipedia Definition A thermodynamic cycle consists of a collection of thermodynamic processes transferring heat and work, while varying pressure, temperature, and other state variables, eventually returning a system to its initial state. In the process of going through this cycle, the system may perform work on its surroundings, therefore acting as a heat engine. State quantities depend only on the thermodynamic state, and cumulative variation of such properties adds up to zero during a cycle. Process quantities (or

418

Proceedings: 1990 Fossil Plant Cycling Conference  

Science Conference Proceedings (OSTI)

With the prospect of much new baseload generation from independent power producers and other qualifying facilities, the cycling capability of utility fossil-fired units originally designed for baseload operation is an ongoing concern. The 30 papers presented at EPRI's fourth cycling conference offer new insights into unit condition and life assessment, conversion, operation, and control as well as some storage-based alternatives to cycling.

1992-02-01T23:59:59.000Z

419

Heat Recovery Steam Generator Cycle Chemistry Instrumentation  

Science Conference Proceedings (OSTI)

Effective monitoring of the purity of water and steam is an integral part of any productive cycle chemistry monitoring program. The Electric Power Research Institute's (EPRI's) heat recovery steam generator (HRSG) cycle chemistry guidelines identified a group of core monitoring parameters that are considered the minimum requirements. Meeting these requirements is part of EPRI's cycle chemistry benchmarking criteria for HRSGs. In addition to the core parameters, many chemistry parameters might need to be ...

2010-11-19T23:59:59.000Z

420

On the cycle structure of permutation polynomials  

Science Conference Proceedings (OSTI)

Any permutation of a finite field F"q can be represented by a polynomial P"n(x)=(...+((a"0x+a"1)^q^-^2+a"2)^q^-^2+...+a"n)^q^-^2+a"n"+"1, for some n>=0. P"0 is linear and the cycle structure of P"1 is known. In this work we present the cycle structure ... Keywords: Cycle structure, Inversive generators, Permutation polynomials of finite fields

AyçA ÇE?Melio?Lu; Wilfried Meidl; Alev Topuzo?Lu

2008-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "vast global cycle" 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

Why sequence microbes integral to the cycling of sulfur and iron?  

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

microbes integral to the cycling of sulfur and iron? microbes integral to the cycling of sulfur and iron? Ten percent of the Earth's surface is subglacial and holds a quarter of the world's soil carbon. The environment was long thought to be incapable of supporting life, but recent studies have revealed that microbes thrive in these cold, dark regions though the processes that enable them to do so remain poorly understood. Researchers are studying the subglacial environment below Taylor Glacier, McMurdo Dry Valleys Antarctica to better understand how carbon is sequestered here and how this impacts the global carbon cycle. The project calls for sequencing five bacteria from this Blood Falls ecosystem to answer questions such as how they tolerate the cold, providing further publicly accessible insight on psychrophiles, and what organic material

422

ARM - PI Product - ARM-LBNL-NOAA Flask Sampler for Carbon Cycle Gases  

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

ProductsARM-LBNL-NOAA Flask Sampler for Carbon Cycle ProductsARM-LBNL-NOAA Flask Sampler for Carbon Cycle Gases Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send PI Product : ARM-LBNL-NOAA Flask Sampler for Carbon Cycle Gases Site(s) SGP General Description Data from ccg-flasks are sampled at the ARM SGP site and analyzed by the NOAA Earth System Research Laboratory (ESRL) as part of the NOAA Cooperative Global Air Sampling Network. Surface samples are collected from a 60m tower at the SGP Central Facility, usually once per week on one afternoon. The aircraft samples are collected approximately weekly from a chartered aircraft, and the collection flight path is centered over the tower where the surface samples are collected. Samples are collected by the ARM/LBNL Carbon Project. CO2 flask data contains measurements of CO2

423

Combined Climate and Carbon-Cycle Effects of Large-Scale Deforestation  

DOE Green Energy (OSTI)

The prevention of deforestation and promotion of afforestation have often been cited as strategies to slow global warming. Deforestation releases CO{sub 2} to the atmosphere, which exerts a warming influence on Earth's climate. However, biophysical effects of deforestation, which include changes in land surface albedo, evapotranspiration, and cloud cover also affect climate. Here we present results from several large-scale deforestation experiments performed with a three-dimensional coupled global carbon-cycle and climate model. These are the first such simulations performed using a fully three-dimensional model representing physical and biogeochemical interactions among land, atmosphere, and ocean. We find that global-scale deforestation has a net cooling influence on Earth's climate, since the warming carbon-cycle effects of deforestation are overwhelmed by the net cooling associated with changes in albedo and evapotranspiration. Latitude-specific deforestation experiments indicate that afforestation projects in the tropics would be clearly beneficial in mitigating global-scale warming, but would be counterproductive if implemented at high latitudes and would offer only marginal benefits in temperate regions. While these results question the efficacy of mid- and high-latitude afforestation projects for climate mitigation, forests remain environmentally valuable resources for many reasons unrelated to climate.

Bala, G; Caldeira, K; Wickett, M; Phillips, T J; Lobell, D B; Delire, C; Mirin, A

2006-10-17T23:59:59.000Z

424

A Global Climatology of Surface Wind and Wind Stress Fields from Eight Years of QuikSCAT Scatterometer Data  

Science Conference Proceedings (OSTI)

Global seasonal cycles of the wind and wind stress fields estimated from the 8-yr record (September 1999–August 2007) of wind measurements by the NASA Quick Scatterometer (QuikSCAT) are presented. While this atlas, referred to here as the ...

Craig M. Risien; Dudley B. Chelton

2008-11-01T23:59:59.000Z

425

Simulation of the Stable Water Isotopes in Precipitation over South America: Comparing Regional to Global Circulation Models  

Science Conference Proceedings (OSTI)

A simulation of the stable water isotope cycle over South America by the regional circulation model REMOiso is discussed. The performance of the regional model, with a resolution of 0.5° (55 km), is compared to simulations by the global ...

Christophe Sturm; Georg Hoffmann; Bärbel Langmann

2007-08-01T23:59:59.000Z

426

Trends, Cycles, and Kinks - Energy Information Administration  

U.S. Energy Information Administration (EIA)

... Historical trends Recent cycle Kinks or shifts in trends Refinery Utilization Grew with Demand ... Across the year, ... Costs for construction were ...

427

Duke Energy's Edwardsport Integrated Gasification Combined Cycle...  

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

Duke Energy's Edwardsport Integrated Gasification Combined Cycle (IGCC) Station presently under construction in Knox County, Indiana. (Photos courtesy of Duke Energy.) Gasification...

428

PCM energy storage during defective thermal cycling.  

E-Print Network (OSTI)

??Incomplete thermal cycling affects storage capacities of phase change materials (PCMs). Existing PCM measuring methods are presented with their drawbacks. A new device named “the… (more)

Koekenbier, S.F.

2011-01-01T23:59:59.000Z

429

Fuel Cycle Research and Development Presentation Title  

Science Conference Proceedings (OSTI)

Separations and Waste Form. Campaign Objectives. ?Develop the next generation of fuel cycle separation and waste management technologies that enable a.

430

Variable pressure power cycle and control system  

DOE Patents (OSTI)

A variable pressure power cycle and control system that is adjustable to a variable heat source is disclosed. The power cycle adjusts itself to the heat source so that a minimal temperature difference is maintained between the heat source fluid and the power cycle working fluid, thereby substantially matching the thermodynamic envelope of the power cycle to the thermodynamic envelope of the heat source. Adjustments are made by sensing the inlet temperature of the heat source fluid and then setting a superheated vapor temperature and pressure to achieve a minimum temperature difference between the heat source fluid and the working fluid.

Goldsberry, Fred L. (Spring, TX)

1984-11-27T23:59:59.000Z

431

2012 Fuel Cycle MPACT Working Group  

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

meeting is to review findings and help advance research and development in the Fuel Cycle Materials Protection, Accounting and Control Technologies area. It will include a campaign...

432

Essays on consumption cycles and corporate finance  

E-Print Network (OSTI)

and the consumption cycle . . . . . . . . . . . . .3.1.6 Optimal consumption, expenditures and1.3.2 Optimal nondurable consumption and durable

Issler, Paulo Floriano

2013-01-01T23:59:59.000Z

433

Tropical Cloud Life Cycle and Overlap Structure  

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

Tropical Cloud Life Cycle and Overlap Structure Vogelmann, Andrew Brookhaven National Laboratory Jensen, Michael Brookhaven National Laboratory Kollias, Pavlos Brookhaven National...

434

Automotive Magnesium Applications and Life Cycle Environmental ...  

Science Conference Proceedings (OSTI)

Jan 22, 2008 ... Life cycle energies and emissions are compared for steel, aluminum and ... 3rd International Conference on SF6 and the Environment, 2004.

435

MULTIPARAMETER OPTIMIZATION STUDIES ON GEOTHERMAL ENERGY CYCLES  

E-Print Network (OSTI)

~Iilora and J. W. Tester, Geothermal Energy as a Source ofpresented at the Susanville Geothermal Energy Converence,of Practical Cycles for Geothermal Power Plants." General

Pope, W.L.

2011-01-01T23:59:59.000Z

436

Humidification Processes in Gas Turbine Cycles.  

E-Print Network (OSTI)

??The global climate change caused by emissions of greenhouse gases from combustion processes has been recognized as a continuously growing problem and much research focuses… (more)

Thern, Marcus

2005-01-01T23:59:59.000Z

437

Seeking to Better Understand the Carbon Cycle  

Office of Science (SC) Website

the biology involved in global climate change as possible to gives us more predictive and management capabilities." Part of the mission of the Department of Energy's Office of...

438

Green Building- Efficient Life Cycle  

E-Print Network (OSTI)

Energy saving does not just apply to traffic, production or agriculture. Buildings are also contributing to the climate change. The focus here is on the energy they use and on their CO2 emissions. Each year, Siemens invests more than two billion euros in the appropriate research and development. For customers, this means that Siemens is already providing them with energy efficient solutions that save resources and reduce emissions. Siemens Real Estate (SRE) has taken on the task of ensuring that Siemens AG will become 20 percent more energy efficient by 2011, and it has turned an efficiency program for existing real estate, which has been in existence since 2005, into an integrated green building initiative. This initiative comprises the components “Sustainable Building Design”, “Life Cycle Cost Analysis”, “Green Building Certification” and “Natural Resources Management”. These components are deliberately arranged around the life cycle of the real estate concerned. This allows a different emphasis to be placed on the different questions in each project phase and each phase of a building’s life and for them to be answered in a targeted manner. “Sustainable Building Design” comes into effect during the tasking and preliminary planning phase of a building project; and, by providing a specially developed sustainability manual, it helps with the definition of target values and the drawing up of efficiency strategies for the planning of the building. The manual epitomizes, and sets out clearly, the attitude of SRE to all building-specific sustainability matters. In addition, it is used in the offering of rewards for project competitions. As a result, through a selection of different energy-efficiency measures that have been roughly conceived beforehand, the primary energy consumption can already be restricted in the project definition phase. “Life Cycle Cost Analysis” comes into effect when the blueprint for buildings is being drawn up. Up to now, when components and systems were being chosen, the main focus was usually on the investment costs involved. By using a cost tool developed specifically to meet the needs of the company, SRE will in future be able to estimate the component-specific utilization costs – such as cleaning, maintenance, and the use of energy – at an early planning stage. “Green Building Certification” is used in building projects during the planning and implementation phase, and it thus ensures the quality of the new real estate over the long term. Siemens is implementing the Green Building Program of the European Commission in new building projects and renovation work in EU countries. In all other countries that are not taking part in the EU Green Building Program, SRE uses certification in accordance with LEED (Leadership in Energy and Environmental Design). In the LEED certification, a transparent and easy-to-use catalog of criteria is employed to make an assessment of the use of energy and other aspects of sustainability, such as the selection of the plot of land, the efficient use of water, the quality of air within buildings, and the selection of materials. This ensures that a neutral and independent assessment is made of all new building and large-scale renovation projects. The action program “Natural Resources Management” rounds off the range of measures in the area of existing real estate. The aim of the program is to identify and highlight all latent efficiency potential in existing buildings. This includes, for instance, modernizing the control equipment used for the heating and ventilation systems. This entails replacing electrical power units with more efficient models, and retrofitting fans and pumps with frequency converters. Sixty buildings have now been inspected, and savings of almost eight million Euros have been achieved. The average payback period is less than two years. One example of this is an old Siemens building from the 1970s at the Munich-Perlach site. Through energy optimization, it has been possible to cu

Kohns, R.

2008-10-01T23:59:59.000Z

439

General pattern of global system conflicts and global threats of the 21st century  

Science Conference Proceedings (OSTI)

Data on global conflicts took place from 750 B.C. up to now are analyzed and their general pattern is revealed. An attempt is made to foresee the next global conflict called the conflict of the 21st century. Its nature and main characteristics are analyzed. ... Keywords: Fibonacci sequence, cluster analysis, global system conflicts, global threats, scenarios

M. Z. Zgurovsky

2007-09-01T23:59:59.000Z

440

Global Futures: A Multithreaded Execution Model for Global Arrays-based Applications  

Science Conference Proceedings (OSTI)

We present Global Futures (GF), an execution model extension to Global Arrays, which is based on a PGAS-compatible active message-based paradigm. We describe the design and implementation of Global Futures and illustrate its use in a computational chemistry ... Keywords: Global Arrays, multithreading, execution models

Daniel Chavarria-Miranda; Sriram Krishnamoorthy; Abhinav Vishnu

2012-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "vast global cycle" 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

Global Nuclear Energy Partnership Fact Sheet | Department of...  

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

Global Nuclear Energy Partnership Fact Sheet Global Nuclear Energy Partnership Fact Sheet The Global Nuclear Energy Partnership (GNEP) is a comprehensive strategy to increase U.S....

442

The Global Nuclear Energy Partnership | Department of Energy  

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

The Global Nuclear Energy Partnership The Global Nuclear Energy Partnership A report on the Global Nuclear Energy Partnership (GNEP) is a comprehensive strategy to increase U.S....

443

CO2 Global Solutions International | Open Energy Information  

Open Energy Info (EERE)

Global Solutions International Jump to: navigation, search Name CO2 Global Solutions International Place Madrid, Spain Zip 28001 Sector Carbon Product CO2 Global Solutions is a...

444

Energy Crossroads: Global Climate Change | Environmental Energy  

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

Global Climate Change Global Climate Change Suggest a Listing Best Global Warming Articles Global Warming Articles provides facts about the causes, effects and answers to global warming; the environment; energy conservation, climate change and more. Ecolytics As emissions requirements, climate change, financial markets, and risk management become increasingly interconnected, organizations are left with critical choices regarding greenhouse gas (GHG) emissions management. Ecolytics(tm), a comprehensive web-based software tool, can help organizations in the navigation of this complex area by providing an effective cataloging, strategic planning, economic analysis, and risk management solution. Enviro$en$e Funded by the Environmental Protection Agency and the Strategic

445

Economic Globalization and a Nuclear Renaissance  

Science Conference Proceedings (OSTI)

The phenomenon of globalization has become increasingly well recognized, documented, and analyzed in the last several years. Globalization, the integration of markets and intra-firm competition on a worldwide basis, involves complex behavioral and mindset changes within a firm that facilitate global competition. The changes revolve around efficient information flow and rapid deployment of technology. The objective of this report is to examine the probable characteristics of a global nuclear renaissance and its broad implications for industry structure and export control relative to nuclear technology. The question of how a modern renaissance would affect the trend toward globalization of the nuclear industry is addressed.

Wood, Thomas W.; Johnson, Wayne L.; Parker, Brian M.

2001-10-22T23:59:59.000Z

446

Global warming and biological diversity  

SciTech Connect

This book is based on presentations given at the World Wildlife Fund's Conference on Consequences of the Greenhouse Effect for Biological Diverisity in 1988, and includes updated literature citations. The general topics covered in the book include the following: overview; summary of past responses of plants to climatic change; general ecological and physiological responses; ecosystems in 4 specific regions (arctic marine, Alaskan North Slope, NW US forests, and Mediterranean); global warming's implications for conservation. Ideas and data from many ecosystems and information about the relationships between biodiversity and climatic change are brought together with a balance of factual information and defensible scientific prognostication.

Peters, R.L.; Lovejoy, T.E. (eds.)

1992-01-01T23:59:59.000Z

447

Global Direct Cost of Corrosion  

Science Conference Proceedings (OSTI)

Table 8   Country-specific direct cost of corrosion for the year 2004...Basque region 1988 Pesetas, 75 100.00 0.75 1.9977 1.5 Czechoslovakia 1998 Koruna, 31.816 (f) 29.8600 1.0655 1.1006 1.17 Netherlands 1969 Guilders, 0.51441 3.6340 0.1416 8.2103 1.16 Sweden 1967 Kroner, 1 5.0000 0.2000 3.0284 0.61 Finland 1965 Markka, 0.175 (g) 3.2110 0.0545 2.0995 0.11 Global...

448

Life cycle assessment of bagasse waste management options  

Science Conference Proceedings (OSTI)

Bagasse is mostly utilized for steam and power production for domestic sugar mills. There have been a number of alternatives that could well be applied to manage bagasse, such as pulp production, conversion to biogas and electricity production. The selection of proper alternatives depends significantly on the appropriateness of the technology both from the technical and the environmental points of view. This work proposes a simple model based on the application of life cycle assessment (LCA) to evaluate the environmental impacts of various alternatives for dealing with bagasse waste. The environmental aspects of concern included global warming potential, acidification potential, eutrophication potential and photochemical oxidant creation. Four waste management scenarios for bagasse were evaluated: landfilling with utilization of landfill gas, anaerobic digestion with biogas production, incineration for power generation, and pulp production. In landfills, environmental impacts depended significantly on the biogas collection efficiency, whereas incineration of bagasse to electricity in the power plant showed better environmental performance than that of conventional low biogas collection efficiency landfills. Anaerobic digestion of bagasse in a control biogas reactor was superior to the other two energy generation options in all environmental aspects. Although the use of bagasse in pulp mills created relatively high environmental burdens, the results from the LCA revealed that other stages of the life cycle produced relatively small impacts and that this option might be the most environmentally benign alternative.

Kiatkittipong, Worapon [Department of Chemical Engineering, Faculty of Engineering and Industrial Technology, Silpakorn University, Nakhon Pathom 73000 (Thailand); National Center of Excellence for Environmental and Hazardous Waste Management, Chulalongkorn University, Bangkok 10330 (Thailand); Wongsuchoto, Porntip [National Center of Excellence for Environmental and Hazardous Waste Management, Chulalongkorn University, Bangkok 10330 (Thailand); Pavasant, Prasert [National Center of Excellence for Environmental and Hazardous Waste Management, Chulalongkorn University, Bangkok 10330 (Thailand); Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok 10330 (Thailand)], E-mail: prasert.p@chula.ac.th

2009-05-15T23:59:59.000Z

449

Total Solar Irradiance Variability and the Solar Activity Cycle  

E-Print Network (OSTI)

It is suggested that the solar variability is due to the perturbed nature of the solar core and this variability is provided by the variability of the solar neutrino flux from the solar neutrino detectors i.e., Homestake, Superkamiokande, SAGE and GALLEX-GNO. The solar neutrino flux in the standard solar model (SSM) was calculated on the assumption of L_nu (neutrino luminosity) = L_gamma (optical luminosity) which implies that if there is a change in optical luminosity then solar neutrino flux data will also be changed. An internal dynamo due to the cyclic variation of nuclear energy generation inside the core of the sun is responsible for the solar activity cycle was suggested and thus the internal magnetic field is also variable. Again the changes in the nuclear energy generation induce structural changes that result in variations of the global solar parameters i.e., luminosity, radius and temperatures etc. From the analysis of total solar irradiance (TSI) data during the year from 1970 to 2003 we have found five phases within the solar activity cycle. The first phase (I) starts before two years from the sunspot minimum. The second phase (II) starts at the time of sunspot minimum and phase (III) starts before 2/3 years from sunspot maximum whereas phase (IV) starts at sunspot maximum and fifth phase (V) starts at after 2-3 years from sunspot maximum.

Probhas Raychaudhuri

2006-01-16T23:59:59.000Z

450

Global Forest Resource Assessment | Open Energy Information  

Open Energy Info (EERE)

Global Forest Resource Assessment Global Forest Resource Assessment Jump to: navigation, search Tool Summary Name: Global Forest Resource Assessment Agency/Company /Organization: Food and Agriculture Organization of the United Nations Sector: Land Focus Area: Forestry Topics: Resource assessment Resource Type: Publications Website: www.fao.org/forestry/fra/fra2010/en/ Global Forest Resource Assessment Screenshot References: Global Forest Research Assessment[1] Overview "FAO, in cooperation with its member countries, has monitored the world's forests at 5 to 10 year intervals since 1946. These global assessments provide valuable information to policy-makers in countries, to international negotiations, arrangements and organizations related to forests and to the general public. The Global Forest Resources Assessment

451

Think Green Global Inc | Open Energy Information  

Open Energy Info (EERE)

Think Green Global Inc Think Green Global Inc Jump to: navigation, search Name Think Green Global, Inc. Place New York, New York Zip 10010 Sector Renewable Energy Product New York-based investment bank and strategic development firm that is dedicated to enhancing the growth of renewable energy and clean technology companies. References Think Green Global, Inc.[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. Think Green Global, Inc. is a company located in New York, New York . References ↑ "Think Green Global, Inc." Retrieved from "http://en.openei.org/w/index.php?title=Think_Green_Global_Inc&oldid=352225" Categories: Clean Energy Organizations Companies Organizations

452

Global Industry Analysts | Open Energy Information  

Open Energy Info (EERE)

Global Industry Analysts Global Industry Analysts Jump to: navigation, search Name Global Industry Analysts Address 6150 Hellyer Avenue Place San Jose, California Zip 95138 Product Market research services Year founded 1987 Number of employees 501-1000 Phone number (408) 528-9966 Website http://www.strategyr.com/ Region Bay Area References Global Industry Analysts[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! Global Industry Analysts Global Industry Analysts, Inc., (GIA) offers one of the world's largest portfolios of research reports in terms of topics covered, geographic regions analyzed, companies profiled, and pages published. The company's current portfolio consists of more than 900 Global Strategic Business Reports (large multi-client research programs); 45,000+ Market Trend

453

Reprocessing in breeder fuel cycles  

SciTech Connect

Over the past decade, the United States has developed plans and carried out programs directed toward the demonstration of breeder fuel reprocessing in connection with early breeder demonstration reactors. Although subject to continuing debate, progress continued on the construction of the Clinch River Breeder Reactor (CRBR) with startup anticipated near the end of this decade, while plans for the CRBR and its associated fuel cycle are still being firmed up, the basic R and D programs required to carry out the demonstrations have continued. Policies call for breeder recycle to begin in the early to mid-1990s. An important objective of the reprocessing program is to develop advanced technology for the recovery of fissile materials in systems that minimize environmental emissions and doses to plant workers, and that also provide effective fissile material safeguards. Major improvements include technology for remote operation and maintenance, low-flow ventilation systems coupled with more effective off-gas treatment, and advanced process monitoring for control and safeguards.

Burch, W.D.; Groenier, W.S.

1983-06-01T23:59:59.000Z

454

Reprocessing in breeder fuel cycles  

Science Conference Proceedings (OSTI)

Over the past decade, the United States has developed plans and carried out programs directed toward the demonstration of breeder fuel reprocessing in connection with the first breeder demonstration reactor. A renewed commitment to moving forward with the construction of the Clinch River Breeder Reactor (CRBR) has been made, with startup anticipated near the end of this decade. While plans for the CRBR and its associated fuel cycle are still being firmed up, the basic research and development programs required to carry out the demonstrations have continued. This paper updates the status of the reprocessing plans and programs. Policies call for breeder recycle to begin in the early to mid-1990's. Contents of this paper are: (1) evolving plans for breeder reprocessing (demonstration reprocessing plant, reprocessing head-end colocated at an existing facility); (2) relationship to LWR reprocessing; (3) integrated equipment test (IET) facility and related hardware development activities (mechanical considerations in shearing and dissolving, remote operations and maintenance demonstration phase of IET, integrated process demonstration phase of IET, separate component development activities); and (4) supporting process R and D.

Burch, W.D.; Groenier, W.S.

1982-01-01T23:59:59.000Z

455

Open cycle - OTEC turbine design  

Science Conference Proceedings (OSTI)

The design of a low-pressure, open cycle ocean thermal energy conversion system (OTEC) is described. Near-surface ocean water at 80 F is allowed to expand in a one-half psi evaporator for passage through a turbine cold water (40 F), pumped upward from a 3,000 ft depth, is used to recondense the steam. Plans for a 2.5-3 MWe prototype plant, as a proof-of-principle project for a 100 MWe plant, include seawater pumps driven off the generator shaft, potable water as a by-product of the condensor, ease of access for O and M, and an integrated, gear-driven deaerator system with reinjection into the warm seawater discharge. An inlet flow of 3,000,000 cu ft/sec, a single stage vertical turbine with 40 ft fiber reinforced composite blades, 200 rpm operation on a 65 ft diameter disk, and an overall efficiency of 3% are features of the 100 MWe plant. A flowfield analysis, a velocity triangle analysis, and a structural dynamics analysis are outlined, along with materials applications and manufacturing process considerations in blade design. The 3MWe OTEC will be one-sixth the size of a 100MWe OTEC.

Coleman, W.H. (Westinghouse Electric Corp., Lester, PA); Rogers, J.D. (TM Development, Inc., Chester, PA); Thompson, D.F. (Delaware University, Newark, DE)

1981-01-01T23:59:59.000Z

456

MHD Integrated Topping Cycle Project  

DOE Green Energy (OSTI)

This fourteenth quarterly technical progress report of the MHD Integrated Topping Cycle Project presents the accomplishments during the period November 1, 1990 to January 31, 1991. Testing of the High Pressure Cooling Subsystem electrical isolator was completed. The PEEK material successfully passed the high temperature, high pressure duration tests (50 hours). The Combustion Subsystem drawings were CADAM released. The procurement process is in progress. An equipment specification and RFP were prepared for the new Low Pressure Cooling System (LPCS) and released for quotation. Work has been conducted on confirmation tests leading to final gas-side designs and studies to assist in channel fabrication.The final cathode gas-side design and the proposed gas-side designs of the anode and sidewall are presented. Anode confirmation tests and related analyses of anode wear mechanisms used in the selection of the proposed anode design are presented. Sidewall confirmation tests, which were used to select the proposed gas-side design, were conducted. The design for the full scale CDIF system was completed. A test program was initiated to investigate the practicality of using Avco current controls for current consolidation in the power takeoff (PTO) regions and to determine the cause of past current consolidation failures. Another important activity was the installation of 1A4-style coupons in the 1A1 channel. A description of the coupons and their location with 1A1 channel is presented herein.

Not Available

1992-02-01T23:59:59.000Z

457

Generation of high power single-cycle and multiple-cycle terahertz pulses  

E-Print Network (OSTI)

In this thesis, we present experimental methods and results of tabletop generation of high power single-cycle and frequency-tunable multiple-cycle terahertz (THz) pulses pumped with near-infrared ultrashort optical pulses ...

Chen, Zhao, S.M. Massachusetts Institute of Technology. Department of Chemistry

2013-01-01T23:59:59.000Z

458

Greenhouse Gas Emissions from the Nuclear Fuel Cycle  

Science Conference Proceedings (OSTI)

Since greenhouse gases are a global concern, rather than a local concern as are some kinds of effluents, one must compare the entire lifecycle of nuclear power to alternative technologies for generating electricity. A recent critical analysis by Sovacool (2008) gives a clearer picture. "It should be noted that nuclear power is not directly emitting greenhouse gas emissions, but rather that lifecycle emissions occur through plant construction, operation, uranium mining and milling, and plant decommissioning." "[N]uclear energy is in no way 'carbon free' or 'emissions free,' even though it is much better (from purely a carbon-equivalent emissions standpoint) than coal, oil, and natural gas electricity generators, but worse than renewable and small scale distributed generators" (Sovacool 2008). According to Sovacool, at an estimated 66 g CO2 equivalent per kilowatt-hour (gCO2e/kWh), nuclear power emits 15 times less CO2 per unit electricity generated than unscrubbed coal generation (at 1050 gCO2e/kWh), but 7 times more than the best renewable, wind (at 9 gCO2e/kWh). The U.S. Nuclear Regulatory Commission (2009) has long recognized CO2 emissions in its regulations concerning the environmental impact of the nuclear fuel cycle. In Table S-3 of 10 CFR 51.51(b), NRC lists a 1000-MW(electric) nuclear plant as releasing as much CO2 as a 45-MW(e) coal plant. A large share of the carbon emissions from the nuclear fuel cycle is due to the energy consumption to enrich uranium by the gaseous diffusion process. A switch to either gas centrifugation or laser isotope separation would dramatically reduce the carbon emissions from the nuclear fuel cycle.

Strom, Daniel J.

2010-03-01T23:59:59.000Z

459

Hybrid Cycles with Hydrogen as Fuel  

Science Conference Proceedings (OSTI)

The gas turbine and steam turbine combined cycle fueled with hydrogen have an overall high efficiency. The virtues of the supercritical steam turbine, the high temperature gas turbine and the low pressure steam turbine are fully expressed in this system. ... Keywords: gas turbine, new energy, combined cycle, hydrogen energy, thermal efficiency, energy conversion

Jing Rulin; Xu Hong; Hu Sangao; Gao Dan; Guo Xiaodan; Ni Weidou

2009-10-01T23:59:59.000Z

460

Simulation and optimization of Westinghouse cycles  

Science Conference Proceedings (OSTI)

Nowadays, hydrogen is industrially produced mainly from fossil fuels by natural gas steam reforming, coal gasification and as by-product of naphtha reforming. Next step of research topic of hydrogen production from renewable sources is utilization of ... Keywords: Westinghouse cycle, hydrogen production, water splitting thermo-chemical cycles

Miroslava Smitkova; Frantisek Janí?ek

2008-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "vast global cycle" 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

Status of IFR fuel cycle demonstration  

SciTech Connect

The next major step in Argonne`s Integral Fast Reactor (IFR) Program is demonstration of the pyroprocess fuel cycle, in conjunction with continued operation of EBR-II. The Fuel Cycle Facility (FCF) is being readied for this mission. This paper will address the status of facility systems and process equipment, the initial startup experience, and plans for the demonstration program.

Lineberry, M.J.; Phipps, R.D.; McFarlane, H.F.

1993-09-01T23:59:59.000Z

462

Uncertainty Analyses of Advanced Fuel Cycles  

SciTech Connect

The Department of Energy is developing technology, experimental protocols, computational methods, systems analysis software, and many other capabilities in order to advance the nuclear power infrastructure through the Advanced Fuel Cycle Initiative (AFDI). Our project, is intended to facilitate will-informed decision making for the selection of fuel cycle options and facilities for development.

Laurence F. Miller; J. Preston; G. Sweder; T. Anderson; S. Janson; M. Humberstone; J. MConn; J. Clark

2008-12-12T23:59:59.000Z

463

Fuel cycles for the 80's  

SciTech Connect

Papers presented at the American Nuclear Society's topical meeting on the fuel cycle are summarized. Present progress and goals in the areas of fuel fabrication, fuel reprocessing, spent fuel storage, accountability, and safeguards are reported. Present governmental policies which affect the fuel cycle are also discussed. Individual presentations are processed for inclusion in the Energy Data Base.(DMC)

Not Available

1980-01-01T23:59:59.000Z

464

Fuel cycle problems in fusion reactors  

SciTech Connect

Fuel cycle problems of fusion reactors evolve around the breeding, recovery, containment, and recycling of tritium. These processes are described, and their implications and alternatives are discussed. Technically, fuel cycle problems are solvable; economically, their feasibility is not yet known. (auth)

Hickman, R.G.

1976-01-13T23:59:59.000Z

465

Solar cycle changes in coronal holes and space weather cycles J. G. Luhmann,1  

E-Print Network (OSTI)

Solar cycle changes in coronal holes and space weather cycles J. G. Luhmann,1 Y. Li,1 C. N. Arge,2-heliolatitude solar wind over approximately the last three solar cycles. Related key parameters like interplanetary explain solar magnetic field control of long-term interplanetary variations. In particular, the enduring

California at Berkeley, University of

466

Cycle Chemistry Guidelines for Combined Cycle/Heat Recovery Steam Generators (HRSGs)  

Science Conference Proceedings (OSTI)

The cycle chemistry in combined cycle plants influences about 70 of the heat recovery steam generator (HRSG) tube failure mechanisms. These guidelines have been assembled to assist operators and chemists in developing an effective overall cycle chemistry program which will prevent HRSG tube failures (HTF).

2006-03-09T23:59:59.000Z

467

Cycling, Startup, Shutdown, and Layup Fossil Plant Cycle Chemistry Guidelines for Operators and Chemists  

Science Conference Proceedings (OSTI)

The purity of water and steam is central to ensuring fossil plant component availability and reliability. Complete optimization of cycle chemistry requires protection of the steam-water cycle during the shutdown, layup, and startup phases of operation. These guidelines will assist utilities in developing cycle chemistry guidelines for all transient operations and shutdowns.

2009-03-31T23:59:59.000Z

468

Binary Cycle Power Plant | Open Energy Information  

Open Energy Info (EERE)

Binary Cycle Power Plant Binary Cycle Power Plant (Redirected from Binary Cycle Power Plants) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Binary Cycle Power Plant General List of Binary Plants Binary power plant process diagram - DOE EERE 2012 Binary cycle geothermal power generation plants differ from Dry Steam and Flash Steam systems in that the water or steam from the geothermal reservoir never comes in contact with the turbine/generator units. Low to moderately heated (below 400°F) geothermal fluid and a secondary (hence, "binary") fluid with a much lower boiling point that water pass through a heat exchanger. Heat from the geothermal fluid causes the secondary fluid to flash to vapor, which then drives the turbines and subsequently, the generators.

469

Binary Cycle Power Plant | Open Energy Information  

Open Energy Info (EERE)

Binary Cycle Power Plant Binary Cycle Power Plant (Redirected from Binary) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Binary Cycle Power Plant General List of Binary Plants Binary power plant process diagram - DOE EERE 2012 Binary cycle geothermal power generation plants differ from Dry Steam and Flash Steam systems in that the water or steam from the geothermal reservoir never comes in contact with the turbine/generator units. Low to moderately heated (below 400°F) geothermal fluid and a secondary (hence, "binary") fluid with a much lower boiling point that water pass through a heat exchanger. Heat from the geothermal fluid causes the secondary fluid to flash to vapor, which then drives the turbines and subsequently, the generators. Binary cycle power plants are closed-loop systems and virtually nothing

470

Nuclear Fuel Cycle Integrated System Analysis  

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

Fuel Cycle Integrated System Analysis Fuel Cycle Integrated System Analysis Abdellatif M. Yacout Argonne National Laboratory Nuclear Engineering Division The nuclear fuel cycle is a complex system with multiple components and activities that are combined to provide nuclear energy to a variety of end users. The end uses of nuclear energy are diverse and include electricity, process heat, water desalination, district heating, and possibly future hydrogen production for transportation and energy storage uses. Components of the nuclear fuel cycle include front end components such as uranium mining, conversion and enrichment, fuel fabrication, and the reactor component. Back end of the fuel cycle include used fuel coming out the reactor, used fuel temporary and permanent storage, and fuel reprocessing. Combined with those components there

471

Wood Burning Combined Cycle Power Plant  

E-Print Network (OSTI)

A combined cycle power plant utilizing wood waste products as a fuel has been designed. This plant will yield a 50% efficiency improvement compared to conventional wood-fueled steam power plants. The power plant features an externally-fired gas turbine combined cycle system that obtains its heat input from a high temperature, high pressure ceramic air heater burning wood waste products as a fuel. This paper presents the results of the design study including the cycle evaluation and a description of the major components of the power plant. The cycle configuration is based on maximum fuel efficiency with minimum capital equipment risk. The cycle discussion includes design point performance of the power plant. The design represents a significant step forward in wood-fueled power plants.

Culley, J. W.; Bourgeois, H. S.

1984-01-01T23:59:59.000Z

472

Transposed critical temperature Rankine thermodynamic cycle  

DOE Green Energy (OSTI)

The transposed critical temperature (TPCT) is shown to be an extremely important thermodynamic property in the selection of the working fluid and turbine states for optimized geothermal power plants operating on a closed organic (binary) Rankine cycle. When the optimum working fluid composition and process states are determined for given source and sink conditions (7 parameter optimization), turbine inlet states are found to be consistently adjacent to the low pressure side of the working fluids' TPCT line on pressure-enthalpy coordinates. Although the TPCT concepts herein may find numerous future applications in high temperature, advanced cycles for fossil or nuclear fired steam power plants and in supercritical organic Rankine heat recovery bottoming cycles for Diesel engines, this discussion is limited to moderate temperature (150 to 250/sup 0/C) closed simple organic Rankine cycle geothermal power plants. Conceptual design calculations pertinent to the first geothermal binary cycle Demonstration Plant are included.

Pope, W.L.; Doyle, P.A.

1980-04-01T23:59:59.000Z

473

VISION: Verifiable Fuel Cycle Simulation Model  

SciTech Connect

The nuclear fuel cycle consists of a set of complex components that work together in unison. In order to support the nuclear renaissance, it is necessary to understand the impacts of changes and timing of events in any part of the fuel cycle system. The Advanced Fuel Cycle Initiative’s systems analysis group is developing a dynamic simulation model, VISION, to capture the relationships, timing, and changes in and among the fuel cycle components to help develop an understanding of how the overall fuel cycle works. This paper is an overview of the philosophy and development strategy behind VISION. The paper includes some descriptions of the model components and some examples of how to use VISION.

Jacob Jacobson; A. M. Yacout; Gretchen Matthern; Steven Piet; David Shropshire; Tyler Schweitzer

2010-11-01T23:59:59.000Z

474

New Kalina cycle promises more efficient cogeneration  

SciTech Connect

The Kalina cycle improves upon the Rankine cycle by adding a distillation phase. This is necessary because the process employs two fluids to make steam-ammonia and water. Use of two fluids is not a new idea, but the Kalina cycle works both components to their optimal extent because of the innovative distillation step. Prior to boiling, an ammonia/water (30/70) solution is raised to an intermediate pressure before entering the distillation subsystem. Here, two streams are created: one, half ammonia, half water; the other, mainly water. The ammonia/based stream is vaporized in the boiler, further raising the pressure, and is expanded through the turbine. It then rejoins the pressurized water stream, where it is condensed-completing the cycle. The Kalina cycle claims higher efficiencies than the Rankine because: less fuel is required to make steam; more pressure is achieved to turn the turbine; less pressure is needed for condensation.

1985-09-01T23:59:59.000Z

475

Pipeline bottoming cycle study. Final report  

Science Conference Proceedings (OSTI)

The technical and economic feasibility of applying bottoming cycles to the prime movers that drive the compressors of natural gas pipelines was studied. These bottoming cycles convert some of the waste heat from the exhaust gas of the prime movers into shaft power and conserve gas. Three typical compressor station sites were selected, each on a different pipeline. Although the prime movers were different, they were similar enough in exhaust gas flow rate and temperature that a single bottoming cycle system could be designed, with some modifications, for all three sites. Preliminary design included selection of the bottoming cycle working fluid, optimization of the cycle, and design of the components, such as turbine, vapor generator and condensers. Installation drawings were made and hardware and installation costs were estimated. The results of the economic assessment of retrofitting bottoming cycle systems on the three selected sites indicated that profitability was strongly dependent upon the site-specific installation costs, how the energy was used and the yearly utilization of the apparatus. The study indicated that the bottoming cycles are a competitive investment alternative for certain applications for the pipeline industry. Bottoming cycles are technically feasible. It was concluded that proper design and operating practices would reduce the environmental and safety hazards to acceptable levels. The amount of gas that could be saved through the year 2000 by the adoption of bottoming cycles for two different supply projections was estimated as from 0.296 trillion ft/sup 3/ for a low supply projection to 0.734 trillion ft/sup 3/ for a high supply projection. The potential market for bottoming cycle equipment for the two supply projections varied from 170 to 500 units of varying size. Finally, a demonstration program plan was developed.

Not Available

1980-06-01T23:59:59.000Z

476

Annual Fossil-Fuel CO2 Emissions: Global Stable Carbon Isotopic Signature  

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

2 2 data Data image Documentation Contributors R.J. Andres, T.A. Boden, and G. Marland The 2012 revision of this database contains estimates of the annual, global mean value of δ 13C of CO2 emissions from fossil-fuel consumption and cement manufacture for 1751-2009. These estimates of the carbon isotopic signature account for the changing mix of coal, petroleum, and natural gas being consumed and for the changing mix of petroleum from various producing areas with characteristic isotopic signatures. This time series of global fossil-fuel del 13C signature provides an additional constraint for balancing the sources and sinks of the global carbon cycle and complements the atmospheric δ 13C measurements that are used to partition the uptake of fossil carbon emissions among the ocean, atmosphere, and terrestrial

477

Annual Fossil-Fuel CO2 Emissions: Global Stable Carbon Isotopic Signature  

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

3 3 data Data image Documentation Contributors R.J. Andres, T.A. Boden, and G. Marland The 2013 revision of this database contains estimates of the annual, global mean value of δ 13C of CO2 emissions from fossil-fuel consumption and cement manufacture for 1751-2010. These estimates of the carbon isotopic signature account for the changing mix of coal, petroleum, and natural gas being consumed and for the changing mix of petroleum from various producing areas with characteristic isotopic signatures. This time series of global fossil-fuel del 13C signature provides an additional constraint for balancing the sources and sinks of the global carbon cycle and complements the atmospheric δ 13C measurements that are used to partition the uptake of fossil carbon emissions among the ocean, atmosphere, and terrestrial

478

Annual Fossil-Fuel CO2 Emissions: Global Stable Carbon Isotopic Signature  

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

1 1 data Data image Documentation Contributors R.J. Andres, T.A. Boden, and G. Marland The 2011 revision of this database contains estimates of the annual, global mean value of del 13C of CO2 emissions from fossil-fuel consumption and cement manufacture for 1751-2008. These estimates of the carbon isotopic signature account for the changing mix of coal, petroleum, and natural gas being consumed and for the changing mix of petroleum from various producing areas with characteristic isotopic signatures. This time series of global fossil-fuel del 13C signature provides an additional constraint for balancing the sources and sinks of the global carbon cycle and complements the atmospheric del 13C measurements that are used to partition the uptake of fossil carbon emissions among the ocean, atmosphere, and terrestrial

479

A Global Database of Soil Respiration Data, Version 2.0  

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

Home > Data > Regional/Global > Soil Collections > Guide Document Home > Data > Regional/Global > Soil Collections > Guide Document A Global Database of Soil Respiration Data, Version 2.0 Get Data Revision date: February 24, 2012 Summary This data set provides an updated soil respiration database (SRDB), a near-universal compendium of published soil respiration (RS) data. Soil respiration, the flux of autotrophically- and heterotrophically-generated CO2 from the soil to the atmosphere remains the least well-constrained component of the terrestrial C cycle. The database encompasses all published studies that report at least one of the following data measured in the field (not laboratory): annual RS, mean seasonal RS, a seasonal or annual partitioning of RS into its sources fluxes, RS temperature response (Q10), or RS at 10 degrees C. SRDB's orientation is thus to seasonal and

480

Global Nuclear Energy Partnership Fact Sheet - Demonstrate More...  

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

Global Nuclear Energy Partnership Fact Sheet - Demonstrate More Proliferation-Resistant Recycling Global Nuclear Energy Partnership Fact Sheet - Demonstrate More...

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


481

Principal Associate Directorate for Global Security: Los National...  

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

Global Security's Future at Los Alamos Nuclear Nonproliferation Space Systems Intelligence Warfighter Support Counterterrorism Mass Effect Event Response Global...

482

Hydrological consequences of global warming  

Science Conference Proceedings (OSTI)

The 2007 Intergovernmental Panel for Climate Change indicates there is strong evidence that the atmospheric concentration of carbon dioxide far exceeds the natural range over the last 650,000 years, and this recent warming of the climate system is unequivocal, resulting in more frequent extreme precipitation events, earlier snowmelt runoff, increased winter flood likelihoods, increased and widespread melting of snow and ice, longer and more widespread droughts, and rising sea level. The effects of recent warming has been well documented and climate model projections indicate a range of hydrological impacts with likely to very likely probabilities (67 to 99 percent) of occurring with significant to severe consequences in response to a warmer lower atmosphere with an accelerating hydrologic cycle.

Miller, Norman L.

2009-06-01T23:59:59.000Z

483

Heard Island global warming test  

SciTech Connect

In late January and early February 1991, an international team will conduct an experiment to test the possibility of measuring global warming in the world's oceans. The goal is to provide early indications of warming caused by the so-called greenhouse effect, the atmospheric buildup of CO{sub 2} and other gases. The method is based on the principle that acoustic energy travels through water between a source and receiver at a speed determined primarily by the water temperature. Thus acoustic travel time can be used as a temperature gauge. The idea is an outgrowth of suggestions made by Professor Walter Munk of the Scripps Institution of Oceanography and Professor Carl Wunsch of MIT in the early 1980s to use long-range underwater acoustic transmissions to measure changes in the heat content of the oceans.

Spindel, R.C. (Univ. of Washington, Seattle (USA))

1991-02-01T23:59:59.000Z

484

Coal mine methane global review  

Science Conference Proceedings (OSTI)

This is the second edition of the Coal Mine Methane Global Overview, updated in the summer of 2008. This document contains individual, comprehensive profiles that characterize the coal and coal mine methane sectors of 33 countries - 22 methane to market partners and an additional 11 coal-producing nations. The executive summary provides summary tables that include statistics on coal reserves, coal production, methane emissions, and CMM projects activity. An International Coal Mine Methane Projects Database accompanies this overview. It contains more detailed and comprehensive information on over two hundred CMM recovery and utilization projects around the world. Project information in the database is updated regularly. This document will be updated annually. Suggestions for updates and revisions can be submitted to the Administrative Support Group and will be incorporate into the document as appropriate.

NONE

2008-07-01T23:59:59.000Z

485

Global Power Solutions LLC | Open Energy Information  

Open Energy Info (EERE)

Power Solutions LLC Power Solutions LLC Jump to: navigation, search Name Global Power Solutions LLC Place Colorado Zip CO 80401 Sector Geothermal energy Product String representation "Global Power So ... sition support." is too long. References Global Power Solutions LLC[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. Global Power Solutions LLC is a company located in Colorado . References ↑ "Global Power Solutions LLC" Retrieved from "http://en.openei.org/w/index.php?title=Global_Power_Solutions_LLC&oldid=345917" Categories: Clean Energy Organizations Companies Organizations Stubs What links here Related changes Special pages Printable version Permanent link

486

GTZ Global Energy Program | Open Energy Information  

Open Energy Info (EERE)

GTZ Global Energy Program GTZ Global Energy Program Jump to: navigation, search Logo: GTZ Global Energy Program Name GTZ Global Energy Program Agency/Company /Organization GTZ Sector Energy Focus Area Energy Efficiency, Renewable Energy Topics Background analysis Website http://www.gtz.de/en/praxis/95 Program Start 2008 Program End 2012 References GTZ projects [1] GTZ is working globally with countries on supply of energy technologies and services to households, SME and public utility institutions. Key products include access to modern energy services and promotion of new technologies. References ↑ "GTZ projects" Retrieved from "http://en.openei.org/w/index.php?title=GTZ_Global_Energy_Program&oldid=328691" Category: Programs What links here Related changes

487

Utility-scale combined-cycle power systems with Kalina bottoming cycles  

SciTech Connect

A new power-generation technology, often referred to as the Kalina cycle, is being developed as a direct replacement for the Rankine steam cycle. It can be applied to any thermal heat source, low or high temperature. Among several Kalina cycle variations, there is one that is particularly well suited as a bottoming cycle for utility combined-cycle applications. It is the subject of this paper. Using an ammonia/water mixture as the working fluid and a condensing system based on absorption-refrigeration principles, the Kalina bottoming cycle outperforms a triple-pressure steam cycle by 16%. Additionally, this version of the Kalina cycle is characterized by an intercooling feature between turbine stages, diametrically opposite to normal reheating practice in steam plants. Energy and mass balances are presented for a 200-MW(electric) Kalina bottoming cycle. Kalina cycle performance is compared to a triple-pressure steam plant. Energy and mass balances are presented as well for a 200-MW(electric) Kalina direct-fired cycle designed for utility purposes.

Kalina, A.I.

1987-01-01T23:59:59.000Z

488

LASL bismuth sulfate thermochemical hydrogen cycle  

DOE Green Energy (OSTI)

The LASL bismuth sulfate cycle is one of a generic class of solid sulfate cycles in which a metal sulfate is substituted for sulfuric acid in a hybrid (partly electrochemical) cycle. This technique avoids the serious materials and heat penalty problems associated with the handling of concentrated acid solutions, and if the electrolyzer is operated at acid concentrations below 50% it may, in principle, lead to a lower cell voltage with subsequent energy savings. Experiment verification of all steps in the cycle has been obtained, particularly for the decomposition of normal bismuth sulfate and lower bismuth oxysulfates. For the substance, Bi/sub 2/O/sub 3/ 2SO/sub 3/, an endothermic requirement of 172 kJ/mol was obtained, which is considerably less than that for other metal sulfate systems. A rotary kiln was used for continuous experiments and our results show decomposition of this compound to Bi/sub 2/O/sub 3/ SO/sub 3/ in under 8 minutes residence time at 1023 K. Preliminary analysis of the cycle's energy balance shows an overall thermal efficiency of greater than 50% when the maximum cycle reaction temperature is 1500 K. The cycle has potential for hydrogen production when coupled with an energy source such as solar or fusion energy.

Cox, K.E.; Jones, W.M.; Peterson, C.L.

1980-01-01T23:59:59.000Z

489

Practical introduction of thorium fuel cycles  

SciTech Connect

The pracitcal introduction of throrium fuel cycles implies that thorium fuel cycles compete economically with uranium fuel cycles in economic nuclear power plants. In this study the reactor types under consideration are light water reactors (LWRs), heavy water reactors (HWRs), high-temperature gas-cooled reactors (HTGRs), and fast breeder reactors (FBRs). On the basis that once-through fuel cycles will be used almost exclusively for the next 20 or 25 years, introduction of economic thorium fuel cycles appears best accomplished by commercial introduction of HTGRs. As the price of natural uranium increases, along with commercialization of fuel recycle, there will be increasing incentive to utilize thorium fuel cycles in heavy water reactors and light water reactors as well as in HTGRs. After FBRs and fuel recycle are commercialized, use of thorium fuel cycles in the blanket of FBRs appears advantageous when fast breeder reactors and thermal reactors operate in a symbiosis mode (i.e., where /sup 233/U bred in the blanket of a fast breeder reactor is utilized as fissile fuel in thermal converter reactors).

Kasten, P.R.

1982-01-01T23:59:59.000Z

490

Parametric analysis of the Kalina cycle  

SciTech Connect

The Kalina cycle utilizes a mixture of ammonia and water as the working fluid in a vapor power cycle. When the liquid mixture is heated the more volatile ammonia tends to vaporize first and at a lower temperature tan does pure water. This property of ammonia-water mixtures makes possible a better match to the enthalpy-temperature curve of a hot gas heat source such as a gas turbine exhaust and also permits circulation of fluids of different composition in different parts of the cycle. Taking advantage of the latter feature, condensation (absorption) can be done at slightly above atmospheric pressure with a low concentration of ammonia, while heat input is at a higher concentration for optimum cycle performance. Computer models have been used to optimize a simplified form of the cycle and to compare results for a more complex version proposed by El-Sayed and Tribus. A method of balancing the cycle was developed and key parameters for optimizing the cycle identified.

Marston, C.H. (Villanova Univ., PA (USA). Dept. of Mechanical Engineering)

1990-01-01T23:59:59.000Z

491

Back end of an enduring fuel cycle  

SciTech Connect

An enduring nuclear fuel cycle is an essential part of sustainable consumption, the process whereby world`s riches are consumed in a responsible manner so that future generations can continue to enjoy at least some of them. In many countries, the goal of sustainable development has focused attention on the benefits of nuclear technologies. However, sustenance of the nuclear fuel cycle is dependent on sensible management of all the resources of the fuel cycle, including energy, spent fuels, and all of its side streams. The nuclear fuel cycle for energy production has suffered many traumas since the mid seventies. The common basis of technologies producing nuclear explosives and consumable nuclear energy has been a preoccupation for some, predicament for others, and a perception problem for many. It is essential to reestablish a reliable back end of the nuclear fuel cycle that can sustain the resource requirements of an enduring full cycle. This paper identifies some pragmatic steps necessary to reverse the trend and to maintain a necessary fuel cycle option for the future.

Pillay, K.K.S.

1998-03-01T23:59:59.000Z

492

Global change research: Science and policy  

SciTech Connect

This report characterizes certain aspects of the Global Change Research Program of the US Government, and its relevance to the short and medium term needs of policy makers in the public and private sectors. It addresses some of the difficulties inherent in the science and policy interface on the issues of global change. Finally, this report offers some proposals for improving the science for policy process in the context of global environmental change.

Rayner, S.

1993-05-01T23:59:59.000Z

493

The Anderson Quin Cycle. Final report  

SciTech Connect

The objective of this study was to make a more refined evaluation of the Anderson Quin Cycle based on most recent information on the performance of various elements that will be used in the Anderson Quin Cycle. My original estimate of the work plan for evaluating and optimizing the Anderson Quin Cycle called for 7000 man hours of work. Since this grant was limited to 2150 man hours, we could not expect to achieve all the objectives within the allotted period of work. However, the most relevant program objectives have been completed as reported here. The analysis generally confirms the results originally estimated in my paper on the subject. (Ref. 2) Further optimizations should show even higher efficiencies. The Anderson Quin Cycle (US Patent applied for) basically consists of 5 elements in the power cycle: A refrigeration system to cool and clean the inlet air before it enters the compressor that supplies air for the gas turbine; a gas turbine consisting of a compressor, combustor, and turbine; a steam boiler and steam turbine system using the heat from the exhaust gas out of the gas turbine; a vapor turbine cycle, which utilizes the condensed heat from the exhaust of the steam turbine and the exhaust gas heat leaving the steam boiler to operate a vapor turbine cycle which utilizes another fluid than water, in this case isobutane; and the fifth element consists of a gas cooler and heat pump system, which removes the heat from the exhaust gas to lower its temperature essentially to atmospheric temperature, and at the same time permits treatment of the exhaust gas to remove acid components such as sulfur dioxide and nitrogen oxides. Current industry accepted component characteristics were incorporated in the performance analysis of the overall cycle, ensuring accurate and meaningful operating predictions. The characteristics and performance of each of the elements are described. The thermal efficiency of the optimized calculated Anderson Quin Cycle is 62 percent.