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Note: This page contains sample records for the topic "future carbon 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.


1

Terrestrial Carbon Cycle Dynamics under Recent and Future Climate Change  

Science Journals Connector (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

2

Grand vision for future ESRL Carbon Cycle Effort Contribution to GEOSS In situ  

E-Print Network [OSTI]

Grand vision for future ESRL Carbon Cycle Effort · Contribution to GEOSS ­ In situ GHG monitoring (~weekly) NOAA Tall Tower Partner regional networks #12;Hypothetical Future GEOSS In Situ GHG NetworkHypothetical Future GEOSS In Situ GHG Network #12;Hypothetical Future GEOSS In Situ GHG NetworkHypothetical Future

3

Quantifying Carbon Cycle Feedbacks  

Science Journals Connector (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

4

Carbon Cycle  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (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

5

Wetland (peat) Carbon Cycle  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Wetland (peat) Carbon Cycle Methane (CH4) is an important greenhouse gas, twenty times more potent than CO2, but atmospheric concentrations of CH4 under future climate change are...

6

Carbon Capture (Carbon Cycle 2.0)  

ScienceCinema (OSTI)

Berend Smit speaks at the Carbon Cycle 2.0 kick-off symposium Feb. 3, 2010. We emit more carbon into the atmosphere than natural processes are able to remove - an imbalance with negative consequences. Carbon Cycle 2.0 is a Berkeley Lab initiative to provide the science needed to restore this balance by integrating the Labs diverse research activities and delivering creative solutions toward a carbon-neutral energy future. http://carboncycle2.lbl.gov/

Smit, Berend

2011-06-08T23:59:59.000Z

7

The future of the carbon cycle: review, calcification response, ballast and feedback on atmospheric CO2  

Science Journals Connector (OSTI)

...inorganic carbon ( C O2) in seawater is in the form HCO- 3 , the...inorganic carbon species in seawater is such that, for a given...effective buffering capacity of seawater is analogous to the Revelle...larger capacity for carbon storage in the oceans than in the atmosphere...

2003-01-01T23:59:59.000Z

8

The Carbon Cycle  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (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

9

BNL | Carbon Cycle Science  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (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

10

Carbon Cycle 2.0  

Broader source: Energy.gov (indexed) [DOE]

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

11

Global Impacts (Carbon Cycle 2.0)  

ScienceCinema (OSTI)

Ashok Gadgil, Faculty Senior Scientist and Acting Director, EETD, also Professor of Environmental Engineering, UC Berkeley, speaks at the Carbon Cycle 2.0 kick-off symposium Feb. 2, 2010. We emit more carbon into the atmosphere than natural processes are able to remove - an imbalance with negative consequences. Carbon Cycle 2.0 is a Berkeley Lab initiative to provide the science needed to restore this balance by integrating the Labs diverse research activities and delivering creative solutions toward a carbon-neutral energy future. http://carboncycle2.lbl.gov/

Gadgil, Ashok [EETD and UC Berkeley

2011-06-08T23:59:59.000Z

12

A Call to Action: Carbon Cycle 2.0 (Carbon Cycle 2.0)  

ScienceCinema (OSTI)

Berkeley Lab Director Paul Alivisatos speaks at the Carbon Cycle 2.0 kick-off symposium Feb. 1, 2010. Humanity emits more carbon into the atmosphere than natural processes are able to remove - an imbalance with negative consequences.Carbon Cycle 2.0 is a Berkeley Lab initiative to provide the science needed to restore this balance by integrating the Labs diverse research activities and delivering creative solutions toward a carbon-neutral energy future. http://carboncycle2.lbl.gov/

Alivisatos, Paul

2011-06-08T23:59:59.000Z

13

Global Carbon Cycle, Carbon Dioxide Emissions and Mitigation  

Science Journals Connector (OSTI)

The carbon cycle is one of the biogeochemical cycles and describes the movement of carbon, in its many forms, within the biosphere, atmosphere, oceans and geosphere. The global carbon cycle involves the earth...

2008-01-01T23:59:59.000Z

14

Carbon Cycle 2.0: Ashok Gadgil: global impact  

ScienceCinema (OSTI)

Ashok Gadgil speaks at the Carbon Cycle 2.0 kick-off symposium Feb. 2, 2010. We emit more carbon into the atmosphere than natural processes are able to remove - an imbalance with negative consequences. Carbon Cycle 2.0 is a Berkeley Lab initiative to provide the science needed to restore this balance by integrating the Labs diverse research activities and delivering creative solutions toward a carbon-neutral energy future. http://carboncycle2.lbl.gov/

Ashok Gadgi

2010-09-01T23:59:59.000Z

15

Energy Demand in China (Carbon Cycle 2.0)  

ScienceCinema (OSTI)

Lynn Price, LBNL scientist, speaks at the Carbon Cycle 2.0 kick-off symposium Feb. 2, 2010. We emit more carbon into the atmosphere than natural processes are able to remove - an imbalance with negative consequences. Carbon Cycle 2.0 is a Berkeley Lab initiative to provide the science needed to restore this balance by integrating the Labs diverse research activities and delivering creative solutions toward a carbon-neutral energy future. http://carboncycle2.lbl.gov/

Price, Lynn

2011-06-08T23:59:59.000Z

16

Carbon-Fuelled Future  

SciTech Connect (OSTI)

Whether due to changes in policy or consumption of available fossil fuels, alternative sources of energy will be required, especially given the rising global energy demand. However, one of the main factors limiting the widespread utilization of renewable energy, such as wind, solar, wave or geothermal, is our ability to store energy. Storage of energy from carbon-neutral sources, such as electricity from solar or wind, can be accomplished through many routes. One approach is to store energy in the form of chemical bonds, as fuels. The conversion of low-energy compounds, such as water and carbon dioxide, to higher energy molecules, such as hydrogen or carbon-based fuels, enables the storage of carbon-neutral energy on a very large scale. The authors work in this area is supported by the US Department of Energy Basic Energy Sciences, Division of Chemical Sciences, Geosciences & Biosciences. Pacific Northwest National Laboratory is operated by Battelle for the US Department of Energy.

Appel, Aaron M.

2014-09-12T23:59:59.000Z

17

Simple ocean carbon cycle models  

SciTech Connect (OSTI)

Simple ocean carbon cycle models can be used to calculate the rate at which the oceans are likely to absorb CO{sub 2} from the atmosphere. For problems involving steady-state ocean circulation, well calibrated ocean models produce results that are very similar to results obtained using general circulation models. Hence, simple ocean carbon cycle models may be appropriate for use in studies in which the time or expense of running large scale general circulation models would be prohibitive. Simple ocean models have the advantage of being based on a small number of explicit assumptions. The simplicity of these ocean models facilitates the understanding of model results.

Caldeira, K. [Lawrence Livermore National Lab., CA (United States); Hoffert, M.I. [New York Univ., NY (United States). Dept. of Earth System Sciences; Siegenthaler, U. [Bern Univ. (Switzerland). Inst. fuer Physik

1994-02-01T23:59:59.000Z

18

Carbon Cycle 2.0: Robert Cheng and Juan Meza  

ScienceCinema (OSTI)

Feb. 4, 2010: Humanity emits more carbon into the atmosphere than natural processes are able to remove - an imbalance with negative consequences. Carbon Cycle 2.0 is a Berkeley Lab initiative to provide the science needed to restore this balance by integrating the Labs diverse research activities and delivering creative solutions toward a carbon-neutral energy future.

Robert Cheng and Juan Meza

2010-09-01T23:59:59.000Z

19

Carbon Cycle 2.0: Paul Alivisatos: Introduction  

ScienceCinema (OSTI)

Berkeley Lab Director Paul Alivisatos speaks at the Carbon Cycle 2.0 kick-off symposium Feb. 1, 2010. Humanity emits more carbon into the atmosphere than natural processes are able to remove - an imbalance with negative consequences.Carbon Cycle 2.0 is a Berkeley Lab initiative to provide the science needed to restore this balance by integrating the Labs diverse research activities and delivering creative solutions toward a carbon-neutral energy future. http://carboncycle2.lbl.gov/

Paul Alivisatos

2010-09-01T23:59:59.000Z

20

NPP and the Global Carbon Cycle  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (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)?

Note: This page contains sample records for the topic "future carbon 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

Fish are crucial in oceanic carbon cycle  

Science Journals Connector (OSTI)

... Fish may play a more important role in the marine carbon cycle than previously thought, ... marine carbon cycle than previously thought, a new study shows. Researchers have found that fish excrete prodigious amounts of a mineral, calcium carbonate, that had been thought to come ...

Roberta Kwok

2009-01-15T23:59:59.000Z

22

Predicting Future Atmospheric Carbon Dioxide Levels  

Science Journals Connector (OSTI)

...Predicting future atmospheric carbon dioxide levels...1978012175 air atmosphere biosphere carbon...Predicting future atmospheric carbon dioxide levels...re-quired 5-Mhz bandwidth, which...synchronization rate of 16 khz and the picture...the interstellar plasma. For UHF frequencies...

U. Siegenthaler; H. Oeschger

1978-01-27T23:59:59.000Z

23

Black Carbon and the Carbon Cycle  

Science Journals Connector (OSTI)

...reduces net CO 2 release by permanent deforestation...constitute a substantial fraction of the missing carbon...estimate of oxygen release assuming 10% of...constitute a substantial fraction of sedimentary organic...formation by vegetation fires may be important...from soils becoming airborne by wind erosion...

Thomas A. J. Kuhlbusch

1998-06-19T23:59:59.000Z

24

Carbon Cycle 2.0: Mary Ann Piette: Impact of efficient buildings  

ScienceCinema (OSTI)

Mary Ann Piette speaks at the Carbon Cycle 2.0 kick-off symposium Feb. 2, 2010. We emit more carbon into the atmosphere than natural processes are able to remove - an imbalance with negative consequences. Carbon Cycle 2.0 is a Berkeley Lab initiative to provide the science needed to restore this balance by integrating the Labs diverse research activities and delivering creative solutions toward a carbon-neutral energy future. http://carboncycle2.lbl.gov/

Mary Ann Piette

2010-09-01T23:59:59.000Z

25

Recuperative supercritical carbon dioxide cycle  

DOE Patents [OSTI]

A power plant includes a closed loop, supercritical carbon dioxide system (CLS-CO.sub.2 system). The CLS-CO.sub.2 system includes a turbine-generator and a high temperature recuperator (HTR) that is arranged to receive expanded carbon dioxide from the turbine-generator. The HTR includes a plurality of heat exchangers that define respective heat exchange areas. At least two of the heat exchangers have different heat exchange areas.

Sonwane, Chandrashekhar; Sprouse, Kenneth M; Subbaraman, Ganesan; O'Connor, George M; Johnson, Gregory A

2014-11-18T23:59:59.000Z

26

Life Cycle Assessment: Past, Present, and Future  

Science Journals Connector (OSTI)

Life cycle assessment (LCA) can develop into life cycle sustainability assessment (LCSA), which is a transdisciplinary integration framework of models rather than a model in itself. ... As the environmental burden from agriculture, and especially from livestock breeding, is known to be quite important, such an analysis was interesting for policy purposes. ...

Jeroen B. Guine; Reinout Heijungs; Gjalt Huppes; Alessandra Zamagni; Paolo Masoni; Roberto Buonamici; Tomas Ekvall; Tomas Rydberg

2010-09-02T23:59:59.000Z

27

Biomass Energy in a Carbon Constrained Future  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Biomass Energy in a Carbon Constrained Future Biomass Energy in a Carbon Constrained Future Speaker(s): William Morrow Date: September 3, 2010 - 12:00pm Location: 90-3122 Seminar Host/Point of Contact: Eric Masanet Two areas of research will be presented: potential roles that domestically sourced biomass energy could play in achieving U.S. environmental and petroleum security goals, and possible pathways for achieving California's long-term greenhouse gas reduction goals. Biomass energy is viewed by many in the electricity and transportation fuel sectors as offering benefits such as greenhouse gas emissions reductions and petroleum fuel substitution. For this reason a large-scale biomass energy industry future is often anticipated although currently biomass energy provides only a small contribution to these sectors. Agriculture models, however,

28

Carbon Cycle Engineering | Open Energy Information  

Open Energy Info (EERE)

Cycle Engineering Cycle Engineering Jump to: navigation, search Name Carbon Cycle Engineering Address 13725 Dutch Creek Road Place Athens, Ohio Zip 45701 Sector Biofuels, Biomass, Efficiency, Renewable Energy Product Agriculture; Consulting; Engineering/architectural/design Phone number 740-541-1685 Website http://www.Carboncycleengineer Coordinates 39.376838°, -82.029904° 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":39.376838,"lon":-82.029904,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

29

Microbial Carbon Cycling in Permafrost-Affected Soils  

SciTech Connect (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

30

ORNL researchers improve soil carbon cycling models | ornl.gov  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

researchers improve soil carbon cycling models researchers improve soil carbon cycling models January 01, 2013 ORNL's new carbon cycling model could help scientists understand the role of soil microbes (MBC) in climate change by tracking extracellular enzymes (ENZ) that break down carbon-rich soil materials (SOC) into forms that microbes can respire (DOC). A more robust model of the soil carbon cycle developed at Oak Ridge National Laboratory (ORNL) improves understanding of carbon residence time in soils and enables scientists to make more accurate climate predictions. The model does a better job than previous models of accounting for how microbes in the soil break down carbon-rich materials and release carbon dioxide. "Soil is a big reservoir of carbon," said co-author Melanie Mayes of the Environmental Sciences Division and the Climate Change Science

31

Belowground Carbon Cycling Processes at the Molecular Scale  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

919 919 Belowground Carbon Cycling Processes at the Molecular Scale An EMSL Science Theme Advisory Panel Workshop Workshop Date: February 19-21, 2013 Prepared for the U.S. Department of Energy's Office of Biological and Environmental Research under Contract DE-AC05-76RL01830 Pacific Northwest National Laboratory Richland, Washington 99352 Belowground Carbon Cycling Processes at the Molecular Scale iii Executive Summary As part of the Belowground Carbon Cycling Processes at the Molecular Scale workshop, an Environmental Molecular

32

FutureGen Industrial Alliance Announces Carbon Storage Site Selection  

Broader source: Energy.gov (indexed) [DOE]

FutureGen Industrial Alliance Announces Carbon Storage Site FutureGen Industrial Alliance Announces Carbon Storage Site Selection Process for FutureGen 2.0 FutureGen Industrial Alliance Announces Carbon Storage Site Selection Process for FutureGen 2.0 October 6, 2010 - 12:00am Addthis WASHINGTON -- The FutureGen Industrial Alliance today announced details of a process that will lead to the selection of an Illinois site for the storage of carbon dioxide (CO2) collected at FutureGen 2.0, a landmark project that will advance the deployment of carbon capture and storage technology at an Ameren Energy Resources power plant in Meredosia, Illinois. Last month the Department of Energy signed two agreements, one with the FutureGen Industrial Alliance and one with Ameren Energy Resources that committed $1 billion in Recovery Act funding to design, build and

33

Climate-Carbon Cycle Interactions Dr. John P. Krasting  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

change. NOAA-GFDL developed two coupled climate- carbon cycle models - or Earth System Models (ESMs) - that are able to simulate these interactions. While the major...

34

COLLOQUIUM: Ensemble Modeling of Climate-Carbon Cycle Interactions...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

change. NOAA-GFDL developed two coupled climate-carbon cycle models - or Earth System Models (ESMs) - that are able to simulate these interactions. While the major...

35

Carbon Dioxide Carbonates in the Earth;s Mantle: Implications to the Deep Carbon Cycle  

SciTech Connect (OSTI)

An increase in the ionic character in C-O bonds at high pressures and temperatures is shown by the chemical/phase transformation diagram of CO{sub 2}. The presence of carbonate carbon dioxide (i-CO{sub 2}) near the Earth's core-mantle boundary condition provides insights into both the deep carbon cycle and the transport of atmospheric CO{sub 2} to anhydrous silicates in the mantle and iron core.

Yoo, Choong-Shik; Sengupta, Amartya; Kim, Minseob (Princeton); (WSU)

2012-05-22T23:59:59.000Z

36

Peer Reviewed: What Future for Carbon Capture and Sequestration?  

Science Journals Connector (OSTI)

Peer Reviewed: What Future for Carbon Capture and Sequestration? ... A New Porous Material to Enhance the Kinetics of Clathrate Process: Application to Precombustion Carbon Dioxide Capture ... A New Porous Material to Enhance the Kinetics of Clathrate Process: Application to Precombustion Carbon Dioxide Capture ...

Howard J. Herzog

2001-04-01T23:59:59.000Z

37

Carbon-nitrogen interactions regulate climate-carbon cycle feedbacks: results from an atmosphere-ocean general circulation model  

E-Print Network [OSTI]

2009 P. E. Thornton et al. : Carbon-nitrogen interactionsregulate climate-carbon cycle feedbacks Monfray, P. ,T. H. : A global ocean carbon climatology: Results from

2009-01-01T23:59:59.000Z

38

Carbon-cycle models for better long-term predictions | EMSL  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Carbon-cycle models for better long-term predictions Carbon-cycle models for better long-term predictions Reduced variation among models should improve precision Improved...

39

Carbon Sequestration and Its Role in the Global Carbon Cycle Geophysical Monograph Series 183  

E-Print Network [OSTI]

73 Carbon Sequestration and Its Role in the Global Carbon Cycle Geophysical Monograph Series 183. Blaine Metting2 The purpose of this chapter is to review terrestrial biological carbon sequestration Northwest National Laboratory, Richland, Washington, USA. #12;74 TERRESTRIAL BIOLOGICAL CARBON SEqUESTRATION

Pennycook, Steve

40

Verifiable Fuel Cycle Simulation Model (VISION): A Tool for Analyzing Nuclear Fuel Cycle Futures  

SciTech Connect (OSTI)

The nuclear fuel cycle consists of a set of complex components that are intended to work together. 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 such as how the system would respond to each technological change, a series of which moves the fuel cycle from where it is to a postulated future state. The system analysis working group of the United States research program on advanced fuel cycles (formerly called the Advanced Fuel Cycle Initiative) 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. For example, VISION users can now change yearly the selection of separation or reactor technologies, the performance characteristics of those technologies, and/or the routing of material among separation and reactor types - with the model still operating on a PC in <5 min.

Jacob J. Jacobson; Steven J. Piet; Gretchen E. Matthern; David E. Shropshire; Robert F. Jeffers; A. M. Yacout; Tyler Schweitzer

2010-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "future carbon 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

Methanogenic burst in the end-Permian carbon cycle  

E-Print Network [OSTI]

The end-Permian extinction is associated with a mysterious disruption to Earths carbon cycle. Here we identify causal mechanisms via three observations. First, we show that geochemical signals indicate superexponential ...

Rothman, Daniel H.

42

Effect of Vinylene Carbonate on Graphite Anode Cycling Efficiency  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Effect of Vinylene Carbonate on Graphite Anode Cycling Efficiency Effect of Vinylene Carbonate on Graphite Anode Cycling Efficiency Title Effect of Vinylene Carbonate on Graphite Anode Cycling Efficiency Publication Type Journal Article Year of Publication 2009 Authors Ridgway, Paul L., Honghe Zheng, Xiangyun Song, Gao Liu, Philip N. Ross, and Vincent S. Battaglia Journal Electrochemical Society Volume 19 Start Page 51 Issue 25 Pagination 51-57 Abstract Vinylene Carbonate (VC) was added to the electrolyte in graphite-lithium half-cells. We report its effect on the coulombic efficiency (as capacity shift) of graphite electrodes under various formation cycling conditions. Cyclic voltammetry on glassy carbon showed that VC passivates the electrode against electrolyte reduction. The dQ/dV plots of the first lithiation of the graphite suggest that VC alters the SEI layer, and that by varying the cell formation rate, the initial ratio of ethylene carbonate to VC in the SEI layer can be controlled. VC was found to decrease first cycle efficiency and reversible capacity (in ongoing cycling) when used to excess. However, experiments with VC additive used with various formation rates did not show any decrease in capacity shift.

43

FutureGen Industrial Alliance Announces Carbon Storage Site Selection...  

Energy Savers [EERE]

(CO2) collected at FutureGen 2.0, a landmark project that will advance the deployment of carbon capture and storage technology at an Ameren Energy Resources power plant in...

44

Uncertainty in future carbon emissions : a preliminary exploration  

E-Print Network [OSTI]

In order to analyze competing policy approaches for addressing global climate change, a wide variety of economic-energy models are used to project future carbon emissions under various policy scenarios. Due to uncertainties ...

Webster, Mort David.

45

Authigenic Carbonate and the History of the Global Carbon Cycle  

Science Journals Connector (OSTI)

...Earth's surface reservoirs ({delta} 13 C...of carbonate rocks. In either case, this...history when the porosity and permeability of...track the bulk rock {delta} 13...of carbonate rocks...sedimentary reservoirs does...

Daniel P. Schrag; John. A. Higgins; Francis A. Macdonald; David T. Johnston

2013-02-01T23:59:59.000Z

46

The Global Carbon Cycle Radiative forcing  

E-Print Network [OSTI]

, solubility defined Effective partial pressure in surface water Gas exchange between air and water driven" of carbon Cooling of high latitude surface waters increases solubility of CO2 and saturation DIC Induces in deep ocean Carbon, nitrogen, phosphorus, iron, etc. returned to inorganic form in the deep waters

Follows, Mick

47

Phosphate influences cycling of iron and carbon in the environment |  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Science Science Computing, Environment & Life Sciences Energy Engineering & Systems Analysis Photon Sciences Physical Sciences & Engineering Energy Frontier Research Centers Science Highlights Postdoctoral Researchers Phosphate influences cycling of iron and carbon in the environment August 30, 2013 Tweet EmailPrint Aquatic and terrestrial environments are dynamic systems where coupled microbiological, geochemical, and hydrological processes define the complex interactions that drive the biogeochemical cycling of water and the major and minor elements. Therefore, a thorough understanding of these complex interactions is critical for predicting the biogeochemical cycling of carbon, nutrients, heavy metals, radionuclides, and other contaminants; managing water quality; and understanding the interactions between

48

Reducing Demand through Efficiency and Services: Impacts and Opportunities in Buildings Sector (Carbon Cycle 2.0)  

SciTech Connect (OSTI)

Mary Ann Piette, Deputy of LBNL's Building Technologies Department and Director of the Demand Response Research Center, speaks at the Carbon Cycle 2.0 kick-off symposium Feb. 2, 2010. We emit more carbon into the atmosphere than natural processes are able to remove - an imbalance with negative consequences. Carbon Cycle 2.0 is a Berkeley Lab initiative to provide the science needed to restore this balance by integrating the Labs diverse research activities and delivering creative solutions toward a carbon-neutral energy future. http://carboncycle2.lbl.gov/

Piette, Mary Ann [Director, Demand Response Research Center] [Director, Demand Response Research Center

2010-02-02T23:59:59.000Z

49

Reducing Demand through Efficiency and Services: Impacts and Opportunities in Buildings Sector (Carbon Cycle 2.0)  

ScienceCinema (OSTI)

Mary Ann Piette, Deputy of LBNL's Building Technologies Department and Director of the Demand Response Research Center, speaks at the Carbon Cycle 2.0 kick-off symposium Feb. 2, 2010. We emit more carbon into the atmosphere than natural processes are able to remove - an imbalance with negative consequences. Carbon Cycle 2.0 is a Berkeley Lab initiative to provide the science needed to restore this balance by integrating the Labs diverse research activities and delivering creative solutions toward a carbon-neutral energy future. http://carboncycle2.lbl.gov/

Piette, Mary Ann [Director, Demand Response Research Center

2011-06-08T23:59:59.000Z

50

Predicting Future Atmospheric Carbon Dioxide Levels  

Science Journals Connector (OSTI)

...re-quired 5-Mhz bandwidth...interstellar plasma. For UHF frequencies of 500 Mhz, this amounts...chang-ing the atmospheric carbon dioxide...in the polar areas. Although...The shaded area indicates the...per-missible atmospheric CO2 level might...emission rates are largest between 2000...

U. Siegenthaler; H. Oeschger

1978-01-27T23:59:59.000Z

51

The Global Carbon Cycle Radiative forcing  

E-Print Network [OSTI]

water Gas exchange between air and water driven by partial pressure difference Ko = CO2 * / pCO2 pCO2 waters increases solubility of CO2 and saturation DIC Induces uptake of CO2 from atmosphere and increase Solubility pump Carbonate chemistry Biological pump Photosynthesis and respiration Causes of glacial

Follows, Mick

52

Prospective Life-Cycle Modeling of Novel Carbon Capture Materials  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Prospective Life-Cycle Modeling of Novel Carbon Capture Materials Prospective Life-Cycle Modeling of Novel Carbon Capture Materials Speaker(s): Roger Sathre Date: December 5, 2011 - 3:30pm Location: 90-4133 Seminar Host/Point of Contact: Anita Estner Barbara Adams In this presentation we describe the prospective life-cycle modeling of metal-organic frameworks (MOF), a novel type of material with the potential for efficiently capturing CO2. Life-cycle modeling of emerging technologies, conducted early in the innovation process, can generate knowledge that can feed back to inform scientific discovery and development. We discuss the challenges of credibly modeling a system that does not yet exist, and describe methodological approaches including parametric system modeling (quantifying relations between system elements), scenario projections (defining plausible pathways for system scale-up),

53

Belowground Carbon Cycling Processes at the Molecular Scale: An EMSL Science Theme Advisory Panel Workshop  

SciTech Connect (OSTI)

As part of the Belowground Carbon Cycling Processes at the Molecular Scale workshop, an EMSL Science Theme Advisory Panel meeting held in February 2013, attendees discussed critical biogeochemical processes that regulate carbon cycling in soil. The meeting attendees determined that as a national scientific user facility, EMSL can provide the tools and expertise needed to elucidate the molecular foundation that underlies mechanistic descriptions of biogeochemical processes that control carbon allocation and fluxes at the terrestrial/atmospheric interface in landscape and regional climate models. Consequently, the workshop's goal was to identify the science gaps that hinder either development of mechanistic description of critical processes or their accurate representation in climate models. In part, this report offers recommendations for future EMSL activities in this research area. The workshop was co-chaired by Dr. Nancy Hess (EMSL) and Dr. Gordon Brown (Stanford University).

Hess, Nancy J.; Brown, Gordon E.; Plata, Charity

2014-02-21T23:59:59.000Z

54

High efficiency carbonate fuel cell/turbine hybrid power cycle  

SciTech Connect (OSTI)

The hybrid power cycle studies were conducted to identify a high efficiency, economically competitive system. A hybrid power cycle which generates power at an LHV efficiency > 70% was identified that includes an atmospheric pressure direct carbonate fuel cell, a gas turbine, and a steam cycle. In this cycle, natural gas fuel is mixed with recycled fuel cell anode exhaust, providing water for reforming fuel. The mixed gas then flows to a direct carbonate fuel cell which generates about 70% of the power. The portion of the anode exhaust which is not recycled is burned and heat transferred through a heat exchanger (HX) to the compressed air from a gas turbine. The heated compressed air is then heated further in the gas turbine burner and expands through the turbine generating 15% of the power. Half the exhaust from the turbine provides air for the anode exhaust burner. All of the turbine exhaust eventually flows through the fuel cell cathodes providing the O2 and CO2 needed in the electrochemical reaction. Exhaust from the cathodes flows to a steam system (heat recovery steam generator, staged steam turbine generating 15% of the cycle power). Simulation of a 200 MW plant with a hybrid power cycle had an LHV efficiency of 72.6%. Power output and efficiency are insensitive to ambient temperature, compared to a gas turbine combined cycle; NOx emissions are 75% lower. Estimated cost of electricity for 200 MW is 46 mills/kWh, which is competitive with combined cycle where fuel cost is > $5.8/MMBTU. Key requirement is HX; in the 200 MW plant studies, a HX operating at 1094 C using high temperature HX technology currently under development by METC for coal gassifiers was assumed. A study of a near term (20 MW) high efficiency direct carbonate fuel cell/turbine hybrid power cycle has also been completed.

Steinfeld, G.; Maru, H.C. [Energy Research Corp., Danbury, CT (United States); Sanderson, R.A. [Sanderson (Robert) and Associates, Wethersfield, CT (United States)

1996-07-01T23:59:59.000Z

55

Authigenic Carbonate and the History of the Global Carbon Cycle  

Science Journals Connector (OSTI)

...production and consumption throughout the...the sediment-water interface or...usually those that reduce sulfate or ferric ironresulting...meters in the water column...of a separate pool of water (pore fluid or intracellular...authigenic carbonate make up 29 to 37...

Daniel P. Schrag; John. A. Higgins; Francis A. Macdonald; David T. Johnston

2013-02-01T23:59:59.000Z

56

Life cycle assessment and biomass carbon accounting  

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

Biomass feedstocks Biomass feedstocks and the climate implications of bioenergy Steven Hamburg Environmental Defense Fund Slides adapted from Reid Miner NCASI On the landscape, the single-plot looks like this 75 Harvested and burned for energy In year zero, the plot is harvested and the wood is burned for energy 1.1 Year 1 After regeneration begins, the growing biomass sequesters small amounts of CO2 annually 2.1 Year 2 2.8 Year 3 ??? Year X, until next harvest Σ = . Over time, if carbon stocks are returned to pre-harvest levels... ...the net emissions over this time are zero. single plot analysis Net Cumulative CO2 combustion emissions Cumulative CO2 combustion emissions Time Time Biomass energy Fossil fuel energy single plot analysis Net Cumulative CO2 combustion emissions Cumulative

57

NETL: Demonstration of a Novel Supercritical Carbon Dioxide Power Cycle  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Oxy-Combustion CO2 Emissions Control Oxy-Combustion CO2 Emissions Control Demonstration of a Novel Supercritical Carbon Dioxide Power Cycle Utilizing Pressurized Oxy-Combustion in Conjunction with Cryogenic Compression Project No.: DE-FE0009395 Southwest Research Institute (SwRI) is developing a novel supercritical carbon dioxide (sCO2) advanced power system utilizing pressurized oxy-combustion in conjunction with cryogenic compression. The proposed power system offers a leap in overall system efficiency while producing an output stream of sequestration ready CO2 at pipeline pressures. The system leverages developments in pressurized oxy-combustion technology and recent developments in sCO2 power cycles to achieve high net cycle efficiencies and produce CO2 at pipeline pressures without requiring additional compression of the flue gas.

58

Black Carbon in the Soil Carbon Cycle: Is it an Oxidation Resistant End-Product?  

E-Print Network [OSTI]

for different materials and combustion temperatures. It is less than 1% for thermally altered biomass at combusBlack Carbon in the Soil Carbon Cycle: Is it an Oxidation Resistant End-Product? Simone resistant product of incomplete combustion, and consists out of a range of combustion products such as char

Fischlin, Andreas

59

Ris Energy Report 7 Future low carbon energy systems  

E-Print Network [OSTI]

Risø Energy Report 7 Future low carbon energy systems Reprint of summary and recommendations Risø-R-1651(EN) October 2008 Edited by Hans Larsen and Leif Sønderberg Petersen #12;Risø Energy Report 7 Preface This Risø Energy Report, the seventh of a series that began in 2002, takes as its point

60

FutureCarbon GmbH | Open Energy Information  

Open Energy Info (EERE)

FutureCarbon GmbH FutureCarbon GmbH Jump to: navigation, search Name FutureCarbon GmbH Place Bayreuth, Germany Zip 95448 Sector Carbon, Efficiency, Hydro, Hydrogen Product The company originated out of a former Mannesmann think tank. Its focus is the development of carbon nano materials.They are developing materials for efficiency improvents of PME fuel cells and others for hydrogen storage. Coordinates 49.945189°, 11.571023° 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":49.945189,"lon":11.571023,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

Note: This page contains sample records for the topic "future carbon 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

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

62

Transportation Energy Futures Series: Freight Transportation Modal Shares: Scenarios for a Low-Carbon Future  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Freight Transportation Modal Freight Transportation Modal Shares: Scenarios for a Low-Carbon Future TRANSPORTATION ENERGY FUTURES SERIES: Freight Transportation Modal Shares: Scenarios for a Low-Carbon Future A Study Sponsored by U.S. Department of Energy Office of Energy Efficiency and Renewable Energy March 2013 Prepared by CAMBRIDGE SYSTEMATICS Cambridge, MA 02140 under subcontract DGJ-1-11857-01 Technical monitoring performed by NATIONAL RENEWABLE ENERGY LABORATORY Golden, Colorado 80401-3305 managed by Alliance for Sustainable Energy, LLC for the U.S. DEPARTMENT OF ENERGY Under contract DC-A36-08GO28308 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

63

Carbon-nitrogen interactions regulate climate-carbon cycle feedbacks: results from an atmosphere-ocean general circulation model  

E-Print Network [OSTI]

Biogeosciences, 6, 20992120, 2009 www.biogeosciences.net/6/2099/2009/ Author(s) 2009. This work is distributed under the Creative Commons Attribution 3.0 License. Biogeosciences Carbon-nitrogen interactions regulate climate-carbon cycle feedbacks.... Inclusion of fundamental ecological interactions between carbon and nitrogen cycles in the land component of an atmosphere-ocean general circulation model (AOGCM) leads to decreased carbon uptake associated with CO2 fertil- ization, and increased carbon...

Thornton, P. E.; Doney, S. C.; Lindsay, Keith; Moore, J. K.; Mahowald, N. M.; Randerson, J. T.; Fung, I.; Lamarque, J. F.; Feddema, Johannes J.

2009-01-01T23:59:59.000Z

64

Multi-century Changes to Global Climate and Carbon Cycle: Results from a Coupled Climate and Carbon Cycle Model  

SciTech Connect (OSTI)

In this paper, we use a coupled climate and carbon cycle model to investigate the global climate and carbon cycle changes out to year 2300 that would occur if CO{sub 2} emissions from all the currently estimated fossil fuel resources were released to the atmosphere. By year 2300, the global climate warms by about 8 K and atmospheric CO{sub 2} reaches 1423 ppmv. The warming is higher than anticipated because the sensitivity to radiative forcing increases as the simulation progresses. In our simulation, the rate of emissions peak at over 30 PgC yr{sup -1} early in the 22nd century. Even at year 2300, nearly 50% of cumulative emissions remain in the atmosphere. In our simulations both soils and living biomass are net carbon sinks throughout the simulation. Despite having relatively low climate sensitivity and strong carbon uptake by the land biosphere, our model projections suggest severe long-term consequences for global climate if all the fossil-fuel carbon is ultimately released to the atmosphere.

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

2005-02-17T23:59:59.000Z

65

Nonlinearity of Ocean Carbon Cycle Feedbacks in CMIP5 Earth System Models  

Science Journals Connector (OSTI)

Carbon cycle feedbacks are usually categorized into carbonconcentration and carbonclimate feedbacks, which arise owing to increasing atmospheric CO2 concentration and changing physical climate. Both feedbacks are often assumed to operate ...

Jrg Schwinger; Jerry F. Tjiputra; Christoph Heinze; Laurent Bopp; James R. Christian; Marion Gehlen; Tatiana Ilyina; Chris D. Jones; David Salas-Mlia; Joachim Segschneider; Roland Sfrian; Ian Totterdell

2014-06-01T23:59:59.000Z

66

Performance improvement options for the supercritical carbon dioxide brayton cycle.  

SciTech Connect (OSTI)

The supercritical carbon dioxide (S-CO{sub 2}) Brayton cycle is under development at Argonne National Laboratory as an advanced power conversion technology for Sodium-Cooled Fast Reactors (SFRs) as well as other Generation IV advanced reactors as an alternative to the traditional Rankine steam cycle. For SFRs, the S-CO{sub 2} Brayton cycle eliminates the need to consider sodium-water reactions in the licensing and safety evaluation, reduces the capital cost of the SFR plant, and increases the SFR plant efficiency. Even though the S-CO{sub 2} cycle has been under development for some time and optimal sets of operating parameters have been determined, those earlier development and optimization studies have largely been directed at applications to other systems such as gas-cooled reactors which have higher operating temperatures than SFRs. In addition, little analysis has been carried out to investigate cycle configurations deviating from the selected 'recompression' S-CO{sub 2} cycle configuration. In this work, several possible ways to improve S-CO{sub 2} cycle performance for SFR applications have been identified and analyzed. One set of options incorporates optimization approaches investigated previously, such as variations in the maximum and minimum cycle pressure and minimum cycle temperature, as well as a tradeoff between the component sizes and the cycle performance. In addition, the present investigation also covers options which have received little or no attention in the previous studies. Specific options include a 'multiple-recompression' cycle configuration, intercooling and reheating, as well as liquid-phase CO{sub 2} compression (pumping) either by CO{sub 2} condensation or by a direct transition from the supercritical to the liquid phase. Some of the options considered did not improve the cycle efficiency as could be anticipated beforehand. Those options include: a double recompression cycle, intercooling between the compressor stages, and reheating between the turbine stages. Analyses carried out as part of the current investigation confirm the possibilities of improving the cycle efficiency that have been identified in previous investigations. The options in this group include: increasing the heat exchanger and turbomachinery sizes, raising of the cycle high end pressure (although the improvement potential of this option is very limited), and optimization of the low end temperature and/or pressure to operate as close to the (pseudo) critical point as possible. Analyses carried out for the present investigation show that significant cycle performance improvement can sometimes be realized if the cycle operates below the critical temperature at its low end. Such operation, however, requires the availability of a heat sink with a temperature lower than 30 C for which applicability of this configuration is dependent upon the climate conditions where the plant is constructed (i.e., potential performance improvements are site specific). Overall, it is shown that the S-CO{sub 2} Brayton cycle efficiency can potentially be increased to 45 %, if a low temperature heat sink is available and incorporation of larger components (e.g.., heat exchangers or turbomachinery) having greater component efficiencies does not significantly increase the overall plant cost.

Moisseytsev, A.; Sienicki, J. J.; Nuclear Engineering Division

2008-07-17T23:59:59.000Z

67

PUBLISHED ONLINE: XX MONTH XXXX | DOI: 10.1038/NCLIMATE1951 Global soil carbon projections are improved by  

E-Print Network [OSTI]

Society relies on Earth system models (ESMs) to project future climate and carbon cycle feedbacks. However

German, Donovan P.

68

PUBLISHED ONLINE: 28 JULY 2013 | DOI: 10.1038/NCLIMATE1951 Global soil carbon projections are improved by  

E-Print Network [OSTI]

Society relies on Earth system models (ESMs) to project future climate and carbon (C) cycle feedbacks

Saleska, Scott

69

Development of advanced off-design models for supercritical carbon dioxide power cycles  

SciTech Connect (OSTI)

In the search for increased efficiency of utility-scale electricity generation, Brayton cycles operating with supercritical carbon dioxide (S-CO{sub 2}) have found considerable interest. There are two main advantages of a S-CO{sub 2} Brayton cycle compared to a Rankine cycle: 1) equal or greater thermal efficiencies can be realized using significantly smaller turbomachinery, and 2) heat rejection is not limited by the saturation temperature of the working fluid, which has the potential to reduce or completely eliminate the need for cooling water and instead allow dry cooling. While dry cooling is especially advantageous for power generation in arid climates, a reduction of water consumption in any location will be increasingly beneficial as tighter environmental regulations are enacted in the future. Because daily and seasonal weather variations may result in a plant operating away from its design point, models that are capable of predicting the off-design performance of S-CO{sub 2} power cycles are necessary for characterizing and evaluating cycle configurations and turbomachinery designs on an annual basis. To this end, an off-design model of a recuperated Brayton cycle was developed based on the radial turbomachinery currently being investigated by Sandia National Laboratory. (authors)

Dyreby, J. J.; Klein, S. A.; Nellis, G. F.; Reindl, D. T. [Univ. of Wisconsin-Madison, Solar Energy Laboratory, 1343 Engineering Research Building, 1500 Engineering Drive, Madison, WI 53706 (United States)

2012-07-01T23:59:59.000Z

70

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

Science Journals Connector (OSTI)

The impact of carbonnitrogen 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

71

Impact of climate change on the Northwestern Mediterranean Sea pelagic planktonic ecosystem and associated carbon cycle  

E-Print Network [OSTI]

and the microbial loop intensifies as the small-sized plankton biomass increases. Carbon net fixation and deep and associated carbon cycle M. Herrmann, C. Estournel, F. Diaz, F. Adloff ; LEGOS, LA, MIO, CNRM The northwestern and associated carbon cycle to the long-term evolution of oceanic and atmospheric circulations. For that we

72

Combined Simple Biosphere/Carnegie-Ames-Stanford Approach terrestrial carbon cycle model  

E-Print Network [OSTI]

Combined Simple Biosphere/Carnegie-Ames-Stanford Approach terrestrial carbon cycle model Kevin and physical processes to test our understanding of the terrestrial carbon cycle and to predict ecosystem biomass and carbon fluxes. We combine the photosynthesis and biophysical calculations in the Simple

Collett Jr., Jeffrey L.

73

The effect of carbonation after demolition on the life cycle assessment of pavements  

E-Print Network [OSTI]

The high contribution of CO? emissions associated with pavements has driven research to assess the life cycle of concrete versus asphalt structures and to develop a strategy to reduce the carbon footprint. The life cycle ...

Rossick, Katelyn M

2014-01-01T23:59:59.000Z

74

Power conversion system design for supercritical carbon dioxide cooled indirect cycle nuclear reactors  

E-Print Network [OSTI]

The supercritical carbon dioxide (S-CO?) cycle is a promising advanced power conversion cycle which couples nicely to many Generation IV nuclear reactors. This work investigates the power conversion system design and ...

Gibbs, Jonathan Paul

2008-01-01T23:59:59.000Z

75

Expert Judgments on the Future of Carbon Capture Tyler R. Loggins  

E-Print Network [OSTI]

Expert Judgments on the Future of Carbon Capture Tyler R. Loggins University of Massachusetts.D., Insight Decisions LLC, Greg Nemet Ph.D., University of Wisconsin Abstract Carbon Capture and Storage (CCS of Carbon Capture" by Erin Baker, Karen Jenni, Greg Nemet, and Tyler Loggins. Future Work · Gathering

Mountziaris, T. J.

76

Uncertainty in Future Carbon Emissions: A Preliminary Exploration Mort D. Webster  

E-Print Network [OSTI]

1 Uncertainty in Future Carbon Emissions: A Preliminary Exploration Mort D. Webster Abstract of economic-energy models are used to project future carbon emissions under various policy scenarios. Due distributions of carbon emissions from the MIT Emissions Prediction and Policy Analysis model. From the specific

77

Let's keep timetables realistic in moving toward a low-carbon electricity future  

SciTech Connect (OSTI)

The paper discusses technology transformation (energy efficiency, renewables, carbon capture and storage, advanced coal technologies, new nuclear energy, plug-in hybrid electric vehicles), economic analysis, and economic safeguards when moving towards a low-carbon electricity future.

Shea, Q.

2008-04-15T23:59:59.000Z

78

Gasification combined cycle: Carbon dioxide recovery, transport, and disposal  

SciTech Connect (OSTI)

The objective of the project is to develop engineering evaluations of technologies for the capture, use, and disposal of carbon dioxide (CO{sub 2}). This project emphasizes CO{sub 2}-capture technologies combined with integrated gasification combined-cycle (IGCC) power systems. Complementary evaluations address CO{sub 2} transportation, CO{sub 2} use, and options for the long-term sequestering of unused CO{sub 2}. Commercially available CO{sub 2}-capture technology is providing a performance and economic baseline against which to compare innovative technologies. The intent is to provide the CO{sub 2} budget, or an {open_quotes}equivalent CO{sub 2}{close_quotes} budget, associated with each of the individual energy-cycle steps, in addition to process design capital and operating costs. The value used for the {open_quotes}equivalent CO{sub 2}{close_quotes} budget is 1 kg of CO{sub 2} per kilowatt-hour (electric). The base case is a 458-MW IGCC system that uses an air-blown Kellogg-Rust-Westinghouse agglomerating fluidized-bed gasifier, Illinois No. 6 bituminous coal feed, and in-bed sulfur removal. Mining, feed preparation, and conversion result in a net electric power production of 454 MW, with a CO{sub 2} release rate of 0.835 kg/kWhe. Two additional life-cycle energy balances for emerging technologies were considered: (1) high-temperature CO{sub 2} separation with calcium- or magnesium-based sorbents, and (2) ambient-temperature facilitated-transport polymer membranes for acid-gas removal.

Doctor, R.D.; Molburg, J.C.; Thimmapuram, P.R.; Berry, G.F.; Livengood, C.D.

1994-09-01T23:59:59.000Z

79

State Externalities Policy and Carbon Dioxide Emissions: Who Bears the Risks of Future Regulation?  

Science Journals Connector (OSTI)

ITEM...: In January 1991, representatives of 38 state consumer advocacy offices and 17 environmental organizations warned utilities that failures to anticipate future carbon-dioxide-emission cost i...

Ralph Cavanagh; Ashok Gupta; Dan Lashof; Marika Tatsutani

1994-01-01T23:59:59.000Z

80

Carbon Capture and Storage FutureGen 2.0 Project Moves Forward...  

Broader source: Energy.gov (indexed) [DOE]

Capture and Storage FutureGen 2.0 Project Moves Forward Into Second Phase Carbon Capture and Storage FutureGen 2.0 Project Moves Forward Into Second Phase February 4, 2013 - 7:25pm...

Note: This page contains sample records for the topic "future carbon 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

Modeling and Optimization of Membrane Reactors for Carbon Capture in Integrated Gasification Combined Cycle Units  

Science Journals Connector (OSTI)

Modeling and Optimization of Membrane Reactors for Carbon Capture in Integrated Gasification Combined Cycle Units ... This paper investigates the alternative of precombustion capture of carbon dioxide from integrated gasification combined cycle (IGCC) plants using membrane reactors equipped with H2-selective zeolite membranes for the water gas shift reaction. ...

Fernando V. Lima; Prodromos Daoutidis; Michael Tsapatsis; John J. Marano

2012-03-08T23:59:59.000Z

82

BUILDINGPI: A FUTURE TOOL FOR BUILDING LIFE CYCLE ANALYSIS James O'Donnell1&2  

E-Print Network [OSTI]

) programs. Using IFC as a standard for data storage, building geometric data can be seamlessly transferredBUILDINGPI: A FUTURE TOOL FOR BUILDING LIFE CYCLE ANALYSIS James O'Donnell1&2 , Elmer Morrissey1 National Laboratory, Berkeley, 94720 ­ U.S.A. ABSTRACT Traditionally building simulation models are used

83

A Carbon Dioxide Gas Turbine Direct Cycle with Partial Condensation for Nuclear Reactors  

SciTech Connect (OSTI)

A carbon dioxide gas turbine power generation system with a partial condensation cycle has been proposed for thermal and fast nuclear reactors, in which compression is done partly in the liquid phase and partly in the gas phase. This cycle achieves higher cycle efficiency than a He direct cycle mainly due to reduced compressor work of the liquid phase and of the carbon dioxide real gas effect, especially in the vicinity of the critical point. If this cycle is applied to a thermal reactor, efficiency of this cycle is about 55% at a reactor outlet temperature of 900 deg. C and pressure of 12.5 MPa, which is higher by about 10% than a typical helium direct gas turbine cycle plant (PBMR) at 900 deg. C and 8.4 MPa; this cycle also provides comparable cycle efficiency at the moderate core outlet temperature of 600 deg. C with that of the helium cycle at 900 deg. C. If this cycle is applied to a fast reactor, it is anticipated to be an alternative to liquid metal cooled fast reactors that can provide slightly higher cycle efficiency at the same core outlet temperature; it would eliminate safety problems, simplify the heat transport system and simplify plant maintenance. A passive decay heat removal system is realized by connecting a liquid carbon dioxide storage tank with the reactor vessel and by supplying carbon dioxide gasified from the tank to the core in case of depressurization event. (authors)

Yasuyoshi Kato; Takeshi Nitawaki; Yoshio Yoshizawa [Research Laboratory for Nuclear Reactors, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo, 152-8550 (Japan)

2002-07-01T23:59:59.000Z

84

Photobiogeochemical cycling of carbon monoxide in the southeastern Beaufort Sea in spring and autumn  

E-Print Network [OSTI]

Photobiogeochemical cycling of carbon monoxide in the southeastern Beaufort Sea in spring the distribution, photoproduction, microbial uptake, and air­sea exchange of carbon monoxide (CO), a key that in warmer seas. Carbon monoxide (CO) is the dominant sink for hydroxyl radicals in the troposphere, thus

Vincent, Warwick F.

85

NETL: News Release - FutureGen Industrial Alliance Announces Carbon Storage  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

6, 2010 6, 2010 FutureGen Industrial Alliance Announces Carbon Storage Site Selection Process for FutureGen 2.0 Washington, D.C. - The FutureGen Industrial Alliance today announced details of a process that will lead to the selection of an Illinois site for the storage of carbon dioxide (CO2) collected at FutureGen 2.0, a landmark project that will advance the deployment of carbon capture and storage technology at an Ameren Energy Resources power plant in Meredosia, Illinois. Last month the Department of Energy signed two agreements, one with the FutureGen Industrial Alliance and one with Ameren Energy Resources that committed $1 billion in Recovery Act funding to design, build and operate FutureGen 2.0. MORE INFO FutureGen 2.0 Siting Guidance FutureGen 2.0 Fact Sheet

86

NERI Quarterly Progress Report -- April 1 - June 30, 2005 -- Development of a Supercritical Carbon Dioxide Brayton Cycle: Improving PBR Efficiency and Testing Material Compatibility  

SciTech Connect (OSTI)

The objective of this research is to improve a helium Brayton cycle and to develop a supercritical carbon dioxide Brayton cycle for the Pebble Bed Reactor (PBR) that can also be applied to the Fast Gas-Cooled Reactor (FGR) and the Very-High-Temperature Gas-Cooled Reactor (VHTR). The proposed supercritical carbon dioxide Brayton cycle will be used to improve the PBR, FGR, and VHTR net plant efficiency. Another objective of this research is to test materials to be used in the power conversion side at supercritical carbon dioxide conditions. Generally, the optimized Brayton cycle and balance of plant (BOP) to be developed from this study can be applied to Generation-IV reactor concepts. Particularly, we are interested in VHTR because it has a good chance of being built in the near future.

Chang Oh

2005-07-01T23:59:59.000Z

87

Carbon Capture and Storage FutureGen 2.0 Project Moves Forward Into Second  

Broader source: Energy.gov (indexed) [DOE]

Carbon Capture and Storage FutureGen 2.0 Project Moves Forward Into Carbon Capture and Storage FutureGen 2.0 Project Moves Forward Into Second Phase Carbon Capture and Storage FutureGen 2.0 Project Moves Forward Into Second Phase February 4, 2013 - 7:25pm Addthis NEWS MEDIA CONTACT (202) 586-4940 WASHINGTON - Following the successful completion of the first phase, the Energy Department today announced the beginning of Phase II of project development with a new cooperative agreement between the FutureGen Industrial Alliance and the Department of Energy for an innovative carbon capture and storage (CCS) project in Illinois. "The Department of Energy is committed to the demonstration of carbon capture and storage technologies. We believe FutureGen 2.0 is an important step in making economic, commercial scale CCS a reality," said U.S.

88

USAID-Energy Trends in Developing Asia: Priorities for a Low-Carbon Future  

Open Energy Info (EERE)

USAID-Energy Trends in Developing Asia: Priorities for a Low-Carbon Future USAID-Energy Trends in Developing Asia: Priorities for a Low-Carbon Future Jump to: navigation, search Tool Summary Name: USAID-Energy Trends in Developing Asia: Priorities for a Low-Carbon Future Agency/Company /Organization: United States Agency for International Development (USAID) Sector: Climate, Energy Focus Area: Renewable Energy, Economic Development Topics: GHG inventory, Low emission development planning, Policies/deployment programs Resource Type: Publications User Interface: Other Website: redd-net.org/resource-library/Energy+Trends+in+Developing+Asia%3A+Prio Language: English USAID-Energy Trends in Developing Asia: Priorities for a Low-Carbon Future Screenshot References: USAID-Energy Trends in Developing Asia: Priorities for a Low-Carbon Future[1]

89

Carbon Dioxide Capture from Integrated Gasification Combined Cycle Gas Streams Using the Ammonium Carbonate-Ammonium Bicarbonate Process  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Integrated Integrated Gasification Combined Cycle Gas Streams Using the Ammonium Carbonate- Ammonium Bicarbonate Process Description Current commercial processes to remove carbon dioxide (CO 2 ) from conventional power plants are expensive and energy intensive. The objective of this project is to reduce the cost associated with the capture of CO 2 from coal based gasification processes, which convert coal and other carbon based feedstocks to synthesis gas.

90

Sharing Knowledge for a Low-Carbon Future: Zoellick and Chu in "live"  

Broader source: Energy.gov (indexed) [DOE]

Sharing Knowledge for a Low-Carbon Future: Zoellick and Chu in Sharing Knowledge for a Low-Carbon Future: Zoellick and Chu in "live" discussion Sharing Knowledge for a Low-Carbon Future: Zoellick and Chu in "live" discussion July 13, 2011 - 12:00am Addthis On Wednesday July 13, World Bank President Robert B. Zoellick and US Energy Secretary Steven Chu will discuss how technology and policy can help the world move toward a low-carbon future. Their half-hour discussion at the World Bank's Washington headquarters will be web-streamed live via the World Bank's external website. The Zoellick-Chu dialogue is part of an all-day gathering of high-level representatives from developing and developed countries, international institutions and think tanks. With more than 100 countries now designing low-carbon development plans, the calls for greater coherence and

91

Sharing Knowledge for a Low-Carbon Future: Zoellick and Chu in "live"  

Broader source: Energy.gov (indexed) [DOE]

Sharing Knowledge for a Low-Carbon Future: Zoellick and Chu in Sharing Knowledge for a Low-Carbon Future: Zoellick and Chu in "live" discussion Sharing Knowledge for a Low-Carbon Future: Zoellick and Chu in "live" discussion July 13, 2011 - 12:00am Addthis On Wednesday July 13, World Bank President Robert B. Zoellick and US Energy Secretary Steven Chu will discuss how technology and policy can help the world move toward a low-carbon future. Their half-hour discussion at the World Bank's Washington headquarters will be web-streamed live via the World Bank's external website. The Zoellick-Chu dialogue is part of an all-day gathering of high-level representatives from developing and developed countries, international institutions and think tanks. With more than 100 countries now designing low-carbon development plans, the calls for greater coherence and

92

Uncertainties in CMIP5 Climate Projections due to Carbon Cycle Feedbacks  

Science Journals Connector (OSTI)

In the context of phase 5 of the Coupled Model Intercomparison Project, most climate simulations use prescribed atmospheric CO2 concentration and therefore do not interactively include the effect of carbon cycle feedbacks. However, the ...

Pierre Friedlingstein; Malte Meinshausen; Vivek K. Arora; Chris D. Jones; Alessandro Anav; Spencer K. Liddicoat; Reto Knutti

2014-01-01T23:59:59.000Z

93

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

94

Transportation Energy Futures Series: Freight Transportation Demand: Energy-Efficient Scenarios for a Low-Carbon Future  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

DEMAND DEMAND Freight Transportation Demand: Energy-Efficient Scenarios for a Low-Carbon Future TRANSPORTATION ENERGY FUTURES SERIES: Freight Transportation Demand: Energy-Efficient Scenarios for a Low-Carbon Future A Study Sponsored by U.S. Department of Energy Office of Energy Efficiency and Renewable Energy March 2013 Prepared by CAMBRIDGE SYSTEMATICS Cambridge, MA 02140 under subcontract DGJ-1-11857-01 Technical monitoring performed by NATIONAL RENEWABLE ENERGY LABORATORY Golden, Colorado 80401-3305 managed by Alliance for Sustainable Energy, LLC for the U.S. DEPARTMENT OF ENERGY Under contract DC-A36-08GO28308 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

95

Deep-Sea Research II 53 (2006) 555575 Spatial and seasonal patterns of carbon cycling  

E-Print Network [OSTI]

of the world's ocean and has been an area of intense scientific interest for several decades (Wu¨ st, 1959Deep-Sea Research II 53 (2006) 555­575 Spatial and seasonal patterns of carbon cycling through stations in the Arabian Sea. The goal of this work was to characterize carbon flows and trophic transfers

Jackson, George

96

Ewing Symposium in Honor of Taro Takahashi: The controversial aspects of the contemporary [carbon] cycle  

SciTech Connect (OSTI)

This Ewing Symposium in honor of Taro Takahashi's work on the carbon cycle was held at Lamont-Doherty Earth Observatory, Palisades, New York, on October 26-27, 2000. A program and set of abstracts are appended to this report. A summary of the meeting (included in this report) will be published in Global Biogeochemical Cycles. The theme of the symposium was the magnitude and cause of excess carbon storage on the north temperate continents. Disagreement exists on the relative roles of forest regrowth and fertilization by excess fixed nitrogen and carbon dioxide, as well as the distribution of this storage. Phenomena playing important roles include pre-anthropogenic gradients in carbon dioxide, the so-called rectification effect, uptake and release of carbon dioxide by the ocean, soil nitrogen dynamics, atmospheric carbon-13 gradients, and the role of fire.

Broecker, Wallace Smith

2001-12-31T23:59:59.000Z

97

Biogeographic variation in evergreen conifer needle longevity and impacts on boreal forest carbon cycle projections  

Science Journals Connector (OSTI)

...positive carbon feedback to future warming using earth system models (28). Empirical observations have found that needle...patterns have not been accounted for by any of the earth system models that were used for estimating the sensitivity of terrestrial...

Peter B. Reich; Roy L. Rich; Xingjie Lu; Ying-Ping Wang; Jacek Oleksyn

2014-01-01T23:59:59.000Z

98

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

Broader source: All U.S. Department of Energy (DOE) Office Webpages (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

99

Role of large scale storage in a UK low carbon energy future Philipp Grunewalda  

E-Print Network [OSTI]

round trip efficiency, both compressed air energy storage and hydrogen storage could become potentialRole of large scale storage in a UK low carbon energy future Philipp Gr¨unewalda , Tim Cockerilla Large scale storage offers the prospect of using excess electricity within a low carbon energy system

100

The future of carbon capture and storage in Europe www.sccs.org.uk s.haszeldine@ed.ac.uk p 1 The future of carbon capture and storage in Europe  

E-Print Network [OSTI]

The future of carbon capture and storage in Europe www.sccs.org.uk s.haszeldine@ed.ac.uk p 1 The future of carbon capture and storage in Europe Response to COM (2013) 180 final Professor Stuart Haszeldine Dr Vivian Scott Mr Chris Littlecott 1 July 2013 SCCS (Scottish carbon capture

Haszeldine, Stuart

Note: This page contains sample records for the topic "future carbon 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

High-Efficiency Receivers for Supercritical Carbon Dioxide Cycles  

Broader source: Energy.gov [DOE]

This fact sheet describes a project awarded under the DOE's 2012 SunShot Concentrating Solar Power R&D award program. The team, led by Brayton Energy, aims to develop and demonstrate a low-cost, high-efficiency solar receiver that is compatible with s-CO2 cycles and modern thermal storage subsystems. Supercritical CO2 Brayton-cycle engines have the potential to increase conversion efficiency to more than 50%. This high conversion efficiency drives down the cost of the supporting solar field, tower, and thermal storage systems, which could significantly reduce the lifetime costs of a CSP system to achieve the SunShot goal.

102

August 22, 2002 Contribution to Stein, R. and Macdonald, R. W. (eds.) The Organic Carbon Cycle in  

E-Print Network [OSTI]

1 August 22, 2002 Contribution to Stein, R. and Macdonald, R. W. (eds.) The Organic Carbon Cycle. This problem is highlighted by a recent study of the carbon budget of the Mackenzie shelf by Macdonald et al

Eicken, Hajo

103

Preindustrial-Control and Twentieth-Century Carbon Cycle Experiments with the Earth System Model CESM1(BGC)  

Science Journals Connector (OSTI)

Version 1 of the Community Earth System Model, in the configuration where its full carbon cycle is enabled, is introduced and documented. In this configuration, the terrestrial biogeochemical model, which includes carbonnitrogen dynamics and is ...

Keith Lindsay; Gordon B. Bonan; Scott C. Doney; Forrest M. Hoffman; David M. Lawrence; Matthew C. Long; Natalie M. Mahowald; J. Keith Moore; James T. Randerson; Peter E. Thornton

2014-12-01T23:59:59.000Z

104

Analysis of Biomass/Coal Co-Gasification for Integrated Gasification Combined Cycle (IGCC) Systems with Carbon Capture.  

E-Print Network [OSTI]

?? In recent years, Integrated Gasification Combined Cycle Technology (IGCC) has become more common in clean coal power operations with carbon capture and sequestration (CCS). (more)

Long, Henry A, III

2011-01-01T23:59:59.000Z

105

Evaluation and Optimization of a Supercritical Carbon Dioxide Power Conversion Cycle for Nuclear Applications  

SciTech Connect (OSTI)

There have been a number of studies involving the use of gases operating in the supercritical mode for power production and process heat applications. Supercritical carbon dioxide (CO2) is particularly attractive because it is capable of achieving relatively high power conversion cycle efficiencies in the temperature range between 550C and 750C. Therefore, it has the potential for use with any type of high-temperature nuclear reactor concept, assuming reactor core outlet temperatures of at least 550C. The particular power cycle investigated in this paper is a supercritical CO2 Recompression Brayton Cycle. The CO2 Recompression Brayton Cycle can be used as either a direct or indirect power conversion cycle, depending on the reactor type and reactor outlet temperature. The advantage of this cycle when compared to the helium Brayton Cycle is the lower required operating temperature; 550C versus 850C. However, the supercritical CO2 Recompression Brayton Cycle requires an operating pressure in the range of 20 MPa, which is considerably higher than the required helium Brayton cycle operating pressure of 8 MPa. This paper presents results of analyses performed using the UniSim process analyses software to evaluate the performance of the supercritical CO2 Brayton Recompression Cycle for different reactor outlet temperatures. The UniSim model assumed a 600 MWt reactor power source, which provides heat to the power cycle at a maximum temperature of between 550C and 750C. The UniSim model used realistic component parameters and operating conditions to model the complete power conversion system. CO2 properties were evaluated, and the operating range for the cycle was adjusted to take advantage of the rapidly changing conditions near the critical point. The UniSim model was then optimized to maximize the power cycle thermal efficiency at the different maximum power cycle operating temperatures. The results of the analyses showed that power cycle thermal efficiencies in the range of 40 to 50% can be achieved.

Edwin A. Harvego; Michael G. McKellar

2011-05-01T23:59:59.000Z

106

R E V I E W Liana Impacts on Carbon Cycling, Storage and Sequestration in Tropical Forests  

E-Print Network [OSTI]

R E V I E W Liana Impacts on Carbon Cycling, Storage and Sequestration in Tropical Forests Geertje for carbon storage and sequestration. Lianas reduce tree growth, survival, and leaf productivity; however liana carbon stocks are unlikely to compensate for liana-induced losses in net carbon sequestration

Schnitzer, Stefan

107

Global Biogeochemistry Models and Global Carbon Cycle Research at Lawrence Livermore National Laboratory  

SciTech Connect (OSTI)

The climate modeling community has long envisioned an evolution from physical climate models to ''earth system'' models that include the effects of biology and chemistry, particularly those processes related to the global carbon cycle. The widely reproduced Box 3, Figure 1 from the 2001 IPCC Scientific Assessment schematically describes that evolution. The community generally accepts the premise that understanding and predicting global and regional climate change requires the inclusion of carbon cycle processes in models to fully simulate the feedbacks between the climate system and the carbon cycle. Moreover, models will ultimately be employed to predict atmospheric concentrations of CO{sub 2} and other greenhouse gases as a function of anthropogenic and natural processes, such as industrial emissions, terrestrial carbon fixation, sequestration, land use patterns, etc. Nevertheless, the development of coupled climate-carbon models with demonstrable quantitative skill will require a significant amount of effort and time to understand and validate their behavior at both the process level and as integrated systems. It is important to consider objectively whether the currently proposed strategies to develop and validate earth system models are optimal, or even sufficient, and whether alternative strategies should be pursued. Carbon-climate models are going to be complex, with the carbon cycle strongly interacting with many other components. Off-line process validation will be insufficient. As was found in coupled atmosphere-ocean GCMs, feedbacks between model components can amplify small errors and uncertainties in one process to produce large biases in the simulated climate. The persistent tropical western Pacific Ocean ''double ITCZ'' and upper troposphere ''cold pole'' problems are examples. Finding and fixing similar types of problems in coupled carbon-climate models especially will be difficult, given the lack of observations required for diagnosis and validation of biogeochemical processes.

Covey, C; Caldeira, K; Guilderson, T; Cameron-Smith, P; Govindasamy, B; Swanston, C; Wickett, M; Mirin, A; Bader, D

2005-05-27T23:59:59.000Z

108

Wetlands, Microbes, and the Carbon Cycle: Behind the Scenes @ Berkeley Lab  

ScienceCinema (OSTI)

Susannah Tringe, who leads the Metagenome Program at the Department of Energy's Joint Genome Institute (JGI), a collaboration in which Berkeley Lab plays a leading role, takes us behind the scenes to show how DNA from unknown wild microbes is extracted and analyzed to see what role they play in the carbon cycle. Tringe collects samples of microbial communities living in the wetland muck of the Sacramento-San Joaquin River Delta, organisms that can determine how these wetlands store or release carbon.

Tringe, Susannah

2013-05-29T23:59:59.000Z

109

The cycling of carbon into and out of dust  

E-Print Network [OSTI]

Observational evidence seems to indicate that the depletion of interstellar carbon into dust shows rather wide variations and that carbon undergoes rather rapid recycling in the interstellar medium (ISM). Small hydrocarbon grains are processed in photo-dissociation regions by UV photons, by ion and electron collisions in interstellar shock waves and by cosmic rays. A significant fraction of hydrocarbon dust must therefore be re-formed by accretion in the dense, molecular ISM. A new dust model (Jones et al., Astron. Astrophys., 2013, 558, A62) shows that variations in the dust observables in the diffuse interstellar medium (nH = 1000 cm^3), can be explained by systematic and environmentally-driven changes in the small hydrocarbon grain population. Here we explore the consequences of gas-phase carbon accretion onto the surfaces of grains in the transition regions between the diffuse ISM and molecular clouds (e.g., Jones, Astron. Astrophys., 2013, 555, A39). We find that significant carbonaceous dust re-processi...

Jones, Anthony P; Koehler, Melanie; Fanciullo, Lapo; Bocchio, Marco; Micelotta, Elisabetta; Verstraete, Laurent; Guillet, Vincent

2014-01-01T23:59:59.000Z

110

A Comparison of Supercritical Carbon Dioxide Power Cycle Configurations with an Emphasis on CSP Applications  

Science Journals Connector (OSTI)

Abstract Recent research suggests that an emerging power cycle technology using supercritical carbon dioxide (s-CO2) operated in a closed-loop Brayton cycle offers the potential of equivalent or higher cycle efficiency versus supercritical or superheated steam cycles at temperatures relevant for CSP applications. Preliminary design-point modeling suggests that s-CO2 cycle configurations can be devised that have similar overall efficiency but different temperature and/or pressure characteristics. This paper employs a more detailed heat exchanger model than previous work to compare the recompression and partial cooling cycles, two cycles with high design-point efficiencies, and illustrates the potential advantages of the latter. Integration of the cycles into CSP systems is studied, with a focus on sensible heat thermal storage and direct s-CO2 receivers. Results show the partial cooling cycle may offer a larger temperature difference across the primary heat exchanger, thereby potentially reducing heat exchanger cost and improving CSP receiver efficiency.

T. Neises; C. Turchi

2014-01-01T23:59:59.000Z

111

Ecological Modelling xxx (2005) xxxxxx Modelling carbon and water cycles in a beech forest  

E-Print Network [OSTI]

on simulated NEE. Finally 17 parameters, linked to photosynthesis, vegetative respiration and soil water are used to create a set of 17,000 simulations, where the values of the 17 key parameters are randomlyEcological Modelling xxx (2005) xxx­xxx Modelling carbon and water cycles in a beech forest Part I

Boyer, Edmond

112

ARM-LBNL-NOAA Flask Sampler for Carbon Cycle Gases  

DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

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 concentration and CO2 stable isotope ratios (13CO2 and C18OO) from flasks collected at the SGP site. The flask samples are collected at 2m, 4m, 25m, and 60m along the 60m tower.

Torn, Margaret

113

CARBON LIFE-CYCLE AND ECONOMIC ANALYSIS OF FOREST CARBON SEQUESTRATION AND WOODY BIOENERGY PRODUCTION.  

E-Print Network [OSTI]

??Sequestering carbon in standing biomass, using woody bioenergy, and using woody products are the three potential ways to utilize forests in reducing greenhouse gases (GHGs) (more)

Shrestha, Prativa

2013-01-01T23:59:59.000Z

114

Litter-Carbon Dynamics: The Importance of Decomposition, Accretion, and Sequestration in Understanding Ecosystem Carbon Cycling.  

E-Print Network [OSTI]

??The atmospheric CO2 concentration has been increasing since the industrial revolution. A proposed mitigation strategy is sequestering carbon (C) in terrestrial ecosystems, either in plant (more)

Kochsiek, Amy

2010-01-01T23:59:59.000Z

115

COMPARISON OF THREE METHODS TO PROJECT FUTURE BASELINE CARBON EMISSIONS IN TEMPERATE RAINFOREST, CURINANCO, CHILE  

SciTech Connect (OSTI)

Deforestation of temperate rainforests in Chile has decreased the provision of ecosystem services, including watershed protection, biodiversity conservation, and carbon sequestration. Forest conservation can restore those ecosystem services. Greenhouse gas policies that offer financing for the carbon emissions avoided by preventing deforestation require a projection of future baseline carbon emissions for an area if no forest conservation occurs. For a proposed 570 km{sup 2} conservation area in temperate rainforest around the rural community of Curinanco, Chile, we compared three methods to project future baseline carbon emissions: extrapolation from Landsat observations, Geomod, and Forest Restoration Carbon Analysis (FRCA). Analyses of forest inventory and Landsat remote sensing data show 1986-1999 net deforestation of 1900 ha in the analysis area, proceeding at a rate of 0.0003 y{sup -1}. The gross rate of loss of closed natural forest was 0.042 y{sup -1}. In the period 1986-1999, closed natural forest decreased from 20,000 ha to 11,000 ha, with timber companies clearing natural forest to establish plantations of non-native species. Analyses of previous field measurements of species-specific forest biomass, tree allometry, and the carbon content of vegetation show that the dominant native forest type, broadleaf evergreen (bosque siempreverde), contains 370 {+-} 170 t ha{sup -1} carbon, compared to the carbon density of non-native Pinus radiata plantations of 240 {+-} 60 t ha{sup -1}. The 1986-1999 conversion of closed broadleaf evergreen forest to open broadleaf evergreen forest, Pinus radiata plantations, shrublands, grasslands, urban areas, and bare ground decreased the carbon density from 370 {+-} 170 t ha{sup -1} carbon to an average of 100 t ha{sup -1} (maximum 160 t ha{sup -1}, minimum 50 t ha{sup -1}). Consequently, the conversion released 1.1 million t carbon. These analyses of forest inventory and Landsat remote sensing data provided the data to evaluate the three methods to project future baseline carbon emissions. Extrapolation from Landsat change detection uses the observed rate of change to estimate change in the near future. Geomod is a software program that models the geographic distribution of change using a defined rate of change. FRCA is an integrated spatial analysis of forest inventory, biodiversity, and remote sensing that produces estimates of forest biodiversity and forest carbon density, spatial data layers of future probabilities of reforestation and deforestation, and a projection of future baseline forest carbon sequestration and emissions for an ecologically-defined area of analysis. For the period 1999-2012, extrapolation from Landsat change detection estimated a loss of 5000 ha and 520,000 t carbon from closed natural forest; Geomod modeled a loss of 2500 ha and 250 000 t; FRCA projected a loss of 4700 {+-} 100 ha and 480,000 t (maximum 760,000 t, minimum 220,000 t). Concerning labor time, extrapolation for Landsat required 90 actual days or 120 days normalized to Bachelor degree level wages; Geomod required 240 actual days or 310 normalized days; FRCA required 110 actual days or 170 normalized days. Users experienced difficulties with an MS-DOS version of Geomod before turning to the Idrisi version. For organizations with limited time and financing, extrapolation from Landsat change provides a cost-effective method. Organizations with more time and financing could use FRCA, the only method where that calculates the deforestation rate as a dependent variable rather than assuming a deforestation rate as an independent variable. This research indicates that best practices for the projection of baseline carbon emissions include integration of forest inventory and remote sensing tasks from the beginning of the analysis, definition of an analysis area using ecological characteristics, use of standard and widely used geographic information systems (GIS) software applications, and the use of species-specific allometric equations and wood densities developed for local species.

Patrick Gonzalez; Antonio Lara; Jorge Gayoso; Eduardo Neira; Patricio Romero; Leonardo Sotomayor

2005-07-14T23:59:59.000Z

116

Transportation Energy Futures Series: Freight Transportation Modal Shares: Scenarios for a Low-Carbon Future  

SciTech Connect (OSTI)

Truck, rail, water, air, and pipeline modes each serve a distinct share of the freight transportation market. The current allocation of freight by mode is the product of technologic, economic, and regulatory frameworks, and a variety of factors -- price, speed, reliability, accessibility, visibility, security, and safety -- influence mode. Based on a comprehensive literature review, this report considers how analytical methods can be used to project future modal shares and offers insights on federal policy decisions with the potential to prompt shifts to energy-efficient, low-emission modes. There are substantial opportunities to reduce the energy used for freight transportation, but it will be difficult to shift large volumes from one mode to another without imposing considerable additional costs on businesses and consumers. This report explores federal government actions that could help trigger the shifts in modal shares needed to reduce energy consumption and emissions. This is one in a series of reports produced as a result of the Transportation Energy Futures project, a Department of Energy-sponsored multi-agency effort to pinpoint underexplored strategies for reducing GHGs and petroleum dependence related to transportation.

Brogan, J. J.; Aeppli, A. E.; Beagan, D. F.; Brown, A.; Fischer, M. J.; Grenzeback, L. R.; McKenzie, E.; Vimmerstedt, L.; Vyas, A. D.; Witzke, E.

2013-03-01T23:59:59.000Z

117

o secure a safe, reliable and low-carbon energy future, we must alter  

E-Print Network [OSTI]

and human behav- iour1 . The US Department of Energy notes2 that supply and demand is "affected as much collect qualitative data about energy consumption. Similar problems are apparent in Europe4 . My analysisT o secure a safe, reliable and low- carbon energy future, we must alter both technologies

Kammen, Daniel M.

118

FutureGen Technologies for Carbon Capture and Storage and Hydrogen and Electricity Production  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

FutureGen FutureGen Technologies for Carbon Capture and Storage and Hydrogen and Electricity Production Office of Fossil Energy U. S. Department of Energy Washington, DC June 2, 2003 Lowell Miller, Director, Office of Coal & Power Systems 24-Jun-03 Slide 2 Office of Fossil Energy Presentation Agenda * FE Hydrogen Program * FutureGen * Carbon Sequestration Leadership Forum (CSLF) 24-Jun-03 Slide 3 Office of Fossil Energy Key Drivers * Decreasing domestic supply will lead to increased imports from less stable regions * Conventional petroleum is finite; production will peak and irreversibly decline due to continually increasing demand * Improving environmental quality - Meeting air emission regulations - Greenhouse gas emissions 0 2 4 6 8 10 12 14 16 18 20 1970 1975 1980 1985 1990 1995 2000 2005

119

Novel Supercritical Carbon Dioxide Power Cycle Utilizing Pressured Oxy-combustion in Conjunction with Cryogenic Compression  

SciTech Connect (OSTI)

The team of Southwest Research Institute (SwRI) and Thar Energy LLC (Thar) applied technology engineering and economic analysis to evaluate two advanced oxy-combustion power cycles, the Cryogenic Pressurized Oxy-combustion Cycle (CPOC), and the Supercritical Oxy-combustion Cycle. This assessment evaluated the performance and economic cost of the two proposed cycles with carbon capture, and included a technology gap analysis of the proposed technologies to determine the technology readiness level of the cycle and the cycle components. The results of the engineering and economic analysis and the technology gap analysis were used to identify the next steps along the technology development roadmap for the selected cycle. The project objectives, as outlined in the FOA, were 90% CO{sub 2} removal at no more than a 35% increase in cost of electricity (COE) as compared to a Supercritical Pulverized Coal Plant without CO{sub 2} capture. The supercritical oxy-combustion power cycle with 99% carbon capture achieves a COE of $121/MWe. This revised COE represents a 21% reduction in cost as compared to supercritical steam with 90% carbon capture ($137/MWe). However, this represents a 49% increase in the COE over supercritical steam without carbon capture ($80.95/MWe), exceeding the 35% target. The supercritical oxy-combustion cycle with 99% carbon capture achieved a 37.9% HHV plant efficiency (39.3% LHV plant efficiency), when coupling a supercritical oxy-combustion thermal loop to an indirect supercritical CO{sub 2} (sCO{sub 2}) power block. In this configuration, the power block achieved 48% thermal efficiency for turbine inlet conditions of 650C and 290 atm. Power block efficiencies near 60% are feasible with higher turbine inlet temperatures, however a design tradeoff to limit firing temperature to 650C was made in order to use austenitic stainless steels for the high temperature pressure vessels and piping and to minimize the need for advanced turbomachinery features such as blade cooling. The overall technical readiness of the supercritical oxy-combustion cycle is TRL 2, Technology Concept, due to the maturity level of the supercritical oxy-combustor for solid fuels, and several critical supporting components, as identified in the Technical Gap Analysis. The supercritical oxycombustor for solid fuels operating at pressures near 100 atm is a unique component of the supercritical oxy-combustion cycle. In addition to the low TRL supercritical oxy-combustor, secondary systems were identified that would require adaptation for use with the supercritical oxycombustion cycle. These secondary systems include the high pressure pulverized coal feed, high temperature cyclone, removal of post-combustion particulates from the high pressure cyclone underflow stream, and micro-channel heat exchangers tolerant of particulate loading. Bench scale testing was utilized to measure coal combustion properties at elevated pressures in a CO{sub 2} environment. This testing included coal slurry preparation, visualization of coal injection into a high pressure fluid, and modification of existing test equipment to facilitate the combustion properties testing. Additional bench scale testing evaluated the effectiveness of a rotary atomizer for injecting a coal-water slurry into a fluid with similar densities, as opposed to the typical application where the high density fluid is injected into a low density fluid. The swirl type supercritical oxy-combustor was developed from initial concept to an advanced design stage through numerical simulation using FLUENT and Chemkin to model the flow through the combustor and provide initial assessment of the coal combustion reactions in the flow path. This effort enabled the initial combustor mechanical layout, initial pressure vessel design, and the conceptual layout of a pilot scale test loop. A pilot scale demonstration of the supercritical oxy-combustion cycle is proposed as the next step in the technology development. This demonstration would advance the supercritical oxy-combustion cycle and the supercritical

Brun, Klaus; McClung, Aaron; Davis, John

2014-03-31T23:59:59.000Z

120

Peatland carbon cycle responses to hydrological change at time scales from years to centuries: Impacts on model  

E-Print Network [OSTI]

Peatland carbon cycle responses to hydrological change at time scales from years to centuries: Impacts on model simulations and regional carbon budgets By Benjamin N. Sulman A dissertation submitted to the long-term storage of carbon in peat, these ecosystems contain a significant fraction of the global

Wisconsin at Madison, University of

Note: This page contains sample records for the topic "future carbon 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

Reducing Carbon Dioxide Emissions with Enhanced Oil Recovery Projects:? A Life Cycle Assessment Approach  

Science Journals Connector (OSTI)

Reducing Carbon Dioxide Emissions with Enhanced Oil Recovery Projects:? A Life Cycle Assessment Approach ... This capacity corresponds approximately to storing the emissions of a 5 MW power plant emitting 65 tons of CO2 per day for almost 1800 years27 or 14 years from a 300 MW coal power plant where 8000 tons of CO2 is captured per day. ... To overcome this CO2 emission problem, there is great interest, esp. in Canada, to capture carbon dioxide and utilize it as a flooding agent for the enhanced oil recovery (EOR) process. ...

Anne-Christine Aycaguer; Miriam Lev-On; Arthur M. Winer

2001-03-01T23:59:59.000Z

122

Long-Term Shifts in Life-Cycle Energy Efficiency and Carbon Intensity  

Science Journals Connector (OSTI)

System-level life-cycle efficiency may decrease as mitigation efforts intensify, since low-efficiency renewable systems with high output have much lower GHG emissions than some high-efficiency fossil fuel systems. ... Climate policies accelerate both improvements in EF and the adoption of renewable technologies, resulting in considerably lower primary energy demand and GHG emissions. ... Schipper, L.; Saenger, C.; Sudardshan, A.Transport and carbon emissions in the United States: The Long View Energies 2011, 4, 563 581 ...

Sonia Yeh; Gouri Shankar Mishra; Geoff Morrison; Jacob Teter; Raul Quiceno; Kenneth Gillingham; Xavier Riera-Palou

2013-02-14T23:59:59.000Z

123

Long-term soil warming and Carbon Cycle Feedbacks to the Climate System  

SciTech Connect (OSTI)

The primary objective of the proposed research was to quantify and explain the effects of a sustained in situ 5oC soil temperature increase on net carbon (C) storage in a northeastern deciduous forest ecosystem. The research was done at an established soil warming experiment at the Harvard Forest in central Massachusetts Barre Woods site established in 2001. In the field, a series of plant and soil measurements were made to quantify changes in C storage in the ecosystem and to provide insights into the possible relationships between C-storage changes and nitrogen (N) cycling changes in the warmed plots. Field measurements included: 1) annual woody increment; 2) litterfall; 3) carbon dioxide (CO2) efflux from the soil surface; 4) root biomass and respiration; 5) microbial biomass; and 6) net N mineralization and net nitrification rates. This research was designed to increase our understanding of how global warming will affect the capacity of temperate forest ecosystems to store C. The work explored how soil warming changes the interactions between the C and N cycles, and how these changes affect land-atmosphere feedbacks. This core research question framed the project What are the effects of a sustained in situ 5oC soil temperature increase on net carbon (C) storage in a northeastern deciduous forest ecosystem? A second critical question was addressed in this research What are the effects of a sustained in situ 5{degrees}C soil temperature increase on nitrogen (N) cycling in a northeastern deciduous forest ecosystem?

Melillo, Jerry M.

2014-04-30T23:59:59.000Z

124

China and a Sustainable Future: Towards a Low Carbon Economy and Society |  

Open Energy Info (EERE)

China and a Sustainable Future: Towards a Low Carbon Economy and Society China and a Sustainable Future: Towards a Low Carbon Economy and Society Jump to: navigation, search Tool Summary LAUNCH TOOL Name: China and a Sustainable Future: Towards a Low Carbon Economy and Society Agency/Company /Organization: United Nations Development Programme Sector: Energy, Land Focus Area: Energy Efficiency, Renewable Energy Website: content.undp.org/go/cms-service/stream/asset/?asset_id=2471266 Country: China Eastern Asia Coordinates: 35.86166°, 104.195397° 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":35.86166,"lon":104.195397,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

125

Drought effects on litterfall, wood production and belowground carbon cycling in an Amazon forest: results of a throughfall reduction experiment  

Science Journals Connector (OSTI)

...properly cited. Drought effects on litterfall, wood production and belowground carbon cycling in an...Barbosa, 136, 68005-080 Santarem, Para, Brazil 2 Woods Hole Research Center149 Woods Hole Road, Falmouth, MA 02543, USA 3 Department...

2008-01-01T23:59:59.000Z

126

Natural migration rates of trees: Global terrestrial carbon cycle implications. Book chapter  

SciTech Connect (OSTI)

The paper discusses the forest-ecological processes which constrain the rate of response by forests to rapid future environmental change. It establishes a minimum response time by natural tree populations which invade alien landscapes and reach the status of a mature, closed canopy forest when maximum carbon storage is realized. It considers rare long-distance and frequent short-distance seed transport, seedling and tree establishment, sequential tree and stand maturation, and spread between newly established colonies.

Solomon, A.M.

1996-06-01T23:59:59.000Z

127

Shedding light on carbon-mineral complexation in the soil environment: impacts on C sequestration and cycling  

E-Print Network [OSTI]

42 Shedding light on carbon-mineral complexation in the soil environment: impacts on C sequestration and cycling Sparks, D.L. & C. Chen Department of Plant and Soil Sciences and Delaware@udel.edu) Abstract Organic matter (OM)-mineral complexation plays a critical role in soil carbon (C) stabilization

Sparks, Donald L.

128

Carbon capture with low energy penalty: Supplementary fired natural gas combined cycles  

Science Journals Connector (OSTI)

Enhancing CO2 concentration in exhaust gas has been considered as a potentially effective method to reduce the penalty of electrical efficiency caused by CO2 chemical absorption in post-combustion carbon capture systems. Supplementary firing is an option that inherently has an increased CO2 concentration in the exhaust gas, albeit a relatively low electrical efficiency due to its increased mass flow of exhaust gas to treat and large temperature difference in heat recovery steam generator. This paper focuses on the methods that can improve the electrical efficiency of the supplementary fired combined cycles (SFCs) integrated with MEA-based CO2 capture. Three modifications have been evaluated: (I) integration of exhaust gas reheating, (II) integration of exhaust gas recirculation, and (III) integration of supercritical bottoming cycle. It is further showed that combining all three modifications results in a significant increase in electrical efficiency which is raised from 43.3% to 54.1% based on Lower Heating Value (LHV) of natural gas when compared to the original SFC. Compared with a conventional combined cycle with a subcritical bottoming cycle and without CO2 capture (56.7% of LHV), the efficiency penalty caused by CO2 capture is only 2.6% of LHV.

Hailong Li; Mario Ditaranto; Jinyue Yan

2012-01-01T23:59:59.000Z

129

Life Cycle Carbon Footprint of Shale Gas: Review of Evidence and Implications  

Science Journals Connector (OSTI)

Life Cycle Carbon Footprint of Shale Gas: Review of Evidence and Implications ... Most of the studies utilize US EPAs Greenhouse Gas Emissions Reporting Background Technical Support Document (TSD) for their assumptions regarding the amount of gas released per completion and the flaring rate for completions, the two critical parameters that describe the amount of greenhouse gases released per completion. ... These ?13C-CH4 data, coupled with the ratios of methane-to-higher-chain hydrocarbons, and ?2H-CH4 values, are consistent with deeper thermogenic methane sources such as the Marcellus and Utica shales at the active sites and matched gas geochem. ...

Christopher L. Weber; Christopher Clavin

2012-04-30T23:59:59.000Z

130

Assessing "Dangerous Climate Change": Required Reduction of Carbon Emissions to Protect Young People, Future Generations and Nature  

E-Print Network [OSTI]

Assessing "Dangerous Climate Change": Required Reduction of Carbon Emissions to Protect Young high and would subject young people, future generations and nature to irreparable harm. Carbon dioxide (CO2) emissions from fossil fuel use must be reduced rapidly to avoid irreversible consequences

Hansen, James E.

131

2005: Future effects of ozone on carbon sequestration and climate change policy using a global  

E-Print Network [OSTI]

production and carbon sequestration. The reduced carbon storage would then require further reductions in

B. Felzer; J. Reilly; J. Melillo; D. Kicklighter; M. Sarofim; C. Wang; R. Prinn; Q. Zhuang

132

Study of Gas-steam Combined Cycle Power Plants Integrated with MCFC for Carbon Dioxide Capture  

Science Journals Connector (OSTI)

Abstract In the field of fossil-fuel based technologies, natural gas combined cycle (NGCC) power plants are currently the best option for electricity generation, having an efficiency close to 60%. However, they produce significant CO2 emissions, amounting to around 0.4 tonne/MWh for new installations. Among the carbon capture and sequestration (CCS) technologies, the process based on chemical absorption is a well-established technology, but markedly reduces the NGCC performances. On the other side, the integration of molten carbonate fuel cells (MCFCs) is recognized as an attractive option to overcome the main drawbacks of traditional CCS technologies. If the cathode side is fed by NGCC exhaust gases, the MCFC operates as a CO2 concentrator, beside providing an additional generating capacity. In this paper the integration of MCFC into a two pressure levels combined cycle is investigated through an energy analysis. To improve the efficiency of MCFC and its integration within the NGCC, plant configurations based on two different gas recirculation options are analyzed. The first is a traditional recirculation of exhaust gases at the compressor inlet; the second, mainly involving the MCFC stack, is based on recirculating a fraction of anode exhaust gases at the cathode inlet. Effects of MCFC operating conditions on energy and environmental performances of the integrated system are evaluated.

Roberto Carapellucci; Roberto Saia; Lorena Giordano

2014-01-01T23:59:59.000Z

133

The effect of political cycles on power investment decisions: Expectations over the repeal and reinstatement of carbon policy mechanisms in Australia  

Science Journals Connector (OSTI)

Abstract Political uncertainty over global greenhouse gas (GHG) mitigation policy is likely to defer investment in cleaner technologies. It may also incentivise short-lived, high-cost interim investments while businesses wait for the uncertainty to subside. The range of possible policy responses to the issue has created uncertainty over the future of national mitigation pathways. Given that the electricity sector, globally, is a major emitter of GHGs, this represents a systematic risk to investment in electricity generation assets. This paper uses a real options analysis framework informed by a survey of experts conducted in Australia used as a proxy to model the degree of the uncertainty to investigate the optimal timing for investment in the conversion of a coal plant to a combined cycle gas turbine plant using the American-style option valuation method. The effect of market and political uncertainty is studied for the Clean Energy Act 2011 in Australia. Political uncertainty is addressed bi-modally in terms of: (1) uncertainty over the repeal of the carbon pricing policy, and (2) if it is repealed, uncertainty over the reinstatement of the policy, to represent the effect of electoral cycles and the possibility of more stringent future global mitigation efforts. Results of the analysis show that although political uncertainty with respect to GHG mitigation policy may delay investment in the conversion of the coal plant, expectations over the reinstatement of the carbon pricing reduces the amount of option premium to defer the conversion decision.

Mahdi ShahNazari; Adam McHugh; Bryan Maybee; Jonathan Whale

2014-01-01T23:59:59.000Z

134

Soilplant nitrogen cycling modulated carbon exchanges in a western temperate conifer forest in Canada  

Science Journals Connector (OSTI)

Nitrogen controls, on the seasonal and inter-annual variability of net ecosystem productivity (NEP) in a western temperate conifer forest in British Columbia, Canada, were simulated by a coupled carbon and nitrogen (C&N) model. The model was developed by incorporating plantsoil nitrogen algorithms in the Carbon-Canadian Land Surface Scheme (C-CLASS). In the coupled C&N-CLASS, the maximum carboxylation rate of Rubisco (Vcmax) is determined non-linearly from the modelled leaf Rubisco-nitrogen, rather than being prescribed. Hence, variations in canopy assimilation and stomatal conductance are sensitive to leaf nitrogen status through the Rubisco enzyme. The plantsoil nitrogen cycle includes nitrogen pools from photosynthetic enzymes, leaves and roots, as well as organic and mineral reservoirs from soil, which are generated, exchanged, and lost by biological fixation, atmospheric deposition, fertilization, mineralization, nitrification, root uptake, denitrification, and leaching. Model output was compared with eddy covariance flux measurements made over a 5-year period (19982002). The model performed very well in simulating half-hourly and monthly mean NEP values for a range of environmental conditions observed during the 5 years. C&N-CLASS simulated NEP values were 274, 437, 354, 352 and 253gCm?2 for 19982002, compared to observed NEP values of 269, 360, 381, 418 and 264gCm?2, for the respective years. Compared to the default C-CLASS, the coupled C&N model showed improvements in simulating the seasonal and annual dynamics of carbon fluxes in this forest. The nitrogen transformation to soil organic forms, mineralization, plant nitrogen uptake and leaf Rubisco-nitrogen concentration patterns were strongly influenced by seasonal and annual temperature variations. In contrast, the impact of precipitation was insignificant on the overall forest nitrogen budget. The coupled C&N modelling framework will help to evaluate the impact of nitrogen cycle on terrestrial ecosystems and its feedbacks on Earth's climate system.

M. Altaf Arain; Fengming Yuan; T. Andrew Black

2006-01-01T23:59:59.000Z

135

Ocean Carbon Cycle Data from the Joint Global Ocean Flux Study (JGOFS)  

DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

The U.S. JGOFS program, a component of the U.S Global Change Research Program, grew out of the recommendations of a National Academy of Sciences workshop in 1984. An ambitious goal was set to understand the controls on the concentrations and fluxes of carbon and associated nutrients in the ocean. A new field of ocean biogeochemistry emerged with an emphasis on quality measurements of carbon system parameters and interdisciplinary field studies of the biological, chemical and physical process which control the ocean carbon cycle. U.S. JGOFS, ended in 2005 with the conclusion of the Synthesis and Modeling Project (SMP). Data are available throughout the U.S. JGOFS web site at http://usjgofs.whoi.edu/ and from the U.S. JGOFS Data System at http://usjgofs.whoi.edu/jg/dir/jgofs/. Major named segments of the project are: Bermuda Atlantic Time Series (BATS) Study, Hawaii Ocean Time-series (HOT) Study, Equatorial Pacific Process Study, North Atlantic Bloom Experiment (1989), Arabian Sea Process Study, and the Southern Ocean Process Study.

136

C4 Cycles: Past, Present, and Future Research on C4 Photosynthesis  

Science Journals Connector (OSTI)

...relatively small and the generation time is short...provide food and fuel for a growing population...patent on the generation of PEP-CK type C4 cycle in rice...biomass to meet the annual U.S. energy mandate...the food versus fuel dilemma in the US...

Jane A. Langdale

2011-11-29T23:59:59.000Z

137

C4 Cycles: Past, Present, and Future Research on C4 Photosynthesis  

Science Journals Connector (OSTI)

...the Calvin-Benson cycle (Price et al., 1994), and PEPCase...in trying to provide food and fuel for a growing population. One...could resolve the food versus fuel dilemma in the US for the foreseeable...Physiol. 156 : 503-513. Price, G.D. , Voncaemmerer, S...

Jane A. Langdale

2011-11-29T23:59:59.000Z

138

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

Science Journals Connector (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

139

Is Integrated Gasification Combined Cycle with Carbon Capture-Storage the Solution for Conventional Coal Power Plants  

E-Print Network [OSTI]

Engineering Management Field Project Is Integrated Gasification Combined Cycle with Carbon Capture-Storage the Solution for Conventional Coal Power Plants By Manish Kundi Fall Semester, 2011 An EMGT Field Project report... 2.4 Environmental Aspects-Emissions 23 3.0 Procedure & Methodology 3.1 Working technology Conventional Coal Plants 30 3.2 Working technology IGCC Power Plants 32 3.3 Carbon Capture and Storage 35 3...

Kundi, Manish

2011-12-16T23:59:59.000Z

140

The cycling and oxidation pathways of organic carbon in a shallow estuary along the Texas Gulf Coast  

SciTech Connect (OSTI)

The cycling and oxidation pathways of organic carbon were investigated at a single shallow water estuarine site in Trinity Bay, Texas, the uppermost lobe of Galveston Bay, during November 2000. Radio-isotopes were used to estimate sediment mixing and accumulation rates, and benthic chamber and pore water measurements were used to determine sediment-water exchange fluxes of oxygen, nutrients and metals, and infer carbon oxidation rates.

Warnken, Kent W.; Santschi, Peter H.; Roberts, Kimberly A.; Gill, Gary A.

2007-08-08T23:59:59.000Z

Note: This page contains sample records for the topic "future carbon 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

BuildingPI: A future tool for building life cycle analysis  

SciTech Connect (OSTI)

Traditionally building simulation models are used at the design phase of a building project. These models are used to optimize various design alternatives, reduce energy consumption and cost. Building performance assessment for the operational phase of a buildings life cycle is sporadic, typically working from historical metered data and focusing on bulk energy assessment. Building Management Systems (BMS) do not explicitly incorporate feedback to the design phase or account for any changes, which have been made to building layout or fabric during construction. This paper discusses a proposal to develop an Industry Foundation Classes (IFC) compliant data visualization tool Building Performance Indicator (BuildingPI) for performance metric and performance effectiveness ratio evaluation.

O'Donnell, James; Morrissey, Elmer; Keane, Marcus; Bazjanac,Vladimir

2004-03-29T23:59:59.000Z

142

Analysing future trends of renewable electricity in the EU in a low-carbon context  

Science Journals Connector (OSTI)

The aim of this paper is to analyse the situation and trends of electricity from renewable energy sources (RES-E) in the EU up to 2030, taking into account several drivers and barriers and different maturity levels for the renewable energy technologies. The methodology is based on the results of simulation models providing insights on future outlooks, complemented with an analysis of regulations and other drivers and barriers. Regarding the most mature renewable electricity technologies, the main drivers will be public policies (carbon prices and support schemes) and the expected up-ward trend in fossil-fuel prices and the main barriers are related to grid access, administrative procedures and the exhaustion of places with the best wind resource. For those already commercial but expensive technologies, the main driver is support schemes (but not carbon prices) allowing the exploitation of the large potential for investment cost reductions. Barriers are mostly related to their high investment costs. Finally, for those technologies which are emerging and immature, further technical improvements as a result of R&D efforts will be needed and they cannot be expected to significantly penetrate the European electricity market until 2030.

Pablo del Ro

2011-01-01T23:59:59.000Z

143

Assessing future nitrogen deposition and carbon cycle feedback using a multimodel approach: Analysis of nitrogen deposition  

E-Print Network [OSTI]

100, 8873 8892. Hack, J. J. (1994), Parameterization ofLin, C. B. Bretherton, J. J. Hack, and P. J. Rasch (2003), AZhang and McFarlane, 1995; Hack, 1994], vertical diffusion [

2005-01-01T23:59:59.000Z

144

Assessing future nitrogen deposition and carbon cycle feedback using a multimodel approach: Analysis of nitrogen deposition  

E-Print Network [OSTI]

lamar@ucar.edu) W. J. Collins, Hadley Centre, Met Office,Livermore, California, USA. Hadley Centre, Met Office,5 horizontal resolution. 2.1.2. Hadley Centre (Had) [ 17

2005-01-01T23:59:59.000Z

145

Journal ofMurirzr Research, 53, 799-8 19, 1995 Carbon cycling in mesohaline ChesapeakeBay sediments 1  

E-Print Network [OSTI]

Journal ofMurirzr Research, 53, 799-8 19, 1995 Carbon cycling in mesohaline ChesapeakeBay sedimentsChesapeake Baywas analyzed using available data on sediment sulfate reduction, sediment oxygen consumption of integrated sediment metabolism and POC burial compared well with direct estimates derived from chlorophyll

Boynton, Walter R.

146

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

Science Journals Connector (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

147

Influence of Dynamic Land Use and Land Cover Change on Simulated Global Terrestrial Carbon and Nitrogen Cycles, Climate-carbon Cycle Feedbacks, and Interactions with Rising CO2 and Anthropogenic Nitrogen Deposition  

SciTech Connect (OSTI)

Previous work has demonstrated the sensitivity of terrestrial net carbon exchange to disturbance history and land use patterns at the scale of individual sites or regions. Here we show the influence of land use and land cover dynamics over the historical period 1850-present on global-scale carbon, nutrient, water, and energy fluxes. We also explore the spatial and temporal details of interactions among land use and disturbance history, rising atmospheric carbon dioxide consentation, and increasing anthropogenic nitrogen deposition. Our simulations show that these interactions are significant, and that their importance grows over time, expressed as a fraction of the independent forcing terms. We conclude with an analysis of the influence of these interactions on the sign and magnitude of global climate-carbon cycle feedbacks.

Thornton, Peter E [ORNL; Hoffman, Forrest M [ORNL; Hurtt, George C [University of Hew Hampshire

2009-12-01T23:59:59.000Z

148

Transportation Energy Futures Series: Freight Transportation Demand: Energy-Efficient Scenarios for a Low-Carbon Future  

SciTech Connect (OSTI)

Freight transportation demand is projected to grow to 27.5 billion tons in 2040, and to nearly 30.2 billion tons in 2050. This report describes the current and future demand for freight transportation in terms of tons and ton-miles of commodities moved by truck, rail, water, pipeline, and air freight carriers. It outlines the economic, logistics, transportation, and policy and regulatory factors that shape freight demand, the trends and 2050 outlook for these factors, and their anticipated effect on freight demand. After describing federal policy actions that could influence future freight demand, the report then summarizes the capabilities of available analytical models for forecasting freight demand. This is one in a series of reports produced as a result of the Transportation Energy Futures project, a Department of Energy-sponsored multi-agency effort to pinpoint underexplored strategies for reducing GHGs and petroleum dependence related to transportation.

Grenzeback, L. R.; Brown, A.; Fischer, M. J.; Hutson, N.; Lamm, C. R.; Pei, Y. L.; Vimmerstedt, L.; Vyas, A. D.; Winebrake, J. J.

2013-03-01T23:59:59.000Z

149

Development of a Supercritical Carbon Dioxide Brayton Cycle: Improving VHTR Efficiency and Testing Material Compatibility - Final Report  

SciTech Connect (OSTI)

Generation IV reactors will need to be intrinsically safe, having a proliferation-resistant fuel cycle and several advantages relative to existing light water reactor (LWR). They, however, must still overcome certain technical issues and the cost barrier before it can be built in the U.S. The establishment of a nuclear power cost goal of 3.3 cents/kWh is desirable in order to compete with fossil combined-cycle, gas turbine power generation. This goal requires approximately a 30 percent reduction in power cost for stateof-the-art nuclear plants. It has been demonstrated that this large cost differential can be overcome only by technology improvements that lead to a combination of better efficiency and more compatible reactor materials. The objectives of this research are (1) to develop a supercritical carbon dioxide Brayton cycle in the secondary power conversion side that can be applied to the Very-High-Temperature Gas-Cooled Reactor (VHTR), (2) to improve the plant net efficiency by using the carbon dioxide Brayton cycle, and (3) to test material compatibility at high temperatures and pressures. The reduced volumetric flow rate of carbon dioxide due to higher density compared to helium will reduce compression work, which eventually increase plant net efficiency.

Chang H. Oh

2006-06-01T23:59:59.000Z

150

Study on a gas-steam combined cycle system with CO2 capture by integrating molten carbonate fuel cell  

Science Journals Connector (OSTI)

Abstract This paper studies a gas-steam combined cycle system with CO2 capture by integrating the MCFC (molten carbonate fuel cell). With the Aspen plus software, this paper builds the model of the overall MCFC-GT hybrid system with CO2 capture and analyzes the effects of the key parameters on the performances of the overall system. The result shows that compared with the gas-steam combined cycle system without CO2 capture, the efficiency of the new system with CO2 capture does not decrease obviously and keeps the same efficiency with the original gas steam combined cycle system when the carbon capture percentage is 45%. When the carbon capture percentage reaches up to 85%, the efficiency of the new system is about 54.96%, only 0.67 percent points lower than that of the original gas-steam combined cycle system. The results show that the new system has an obvious superiority of thermal performance. However, its technical economic performance needs be improved with the technical development of MCFC and ITM (oxygen ion transfer membrane). Achievements from this paper will provide the useful reference for CO2 capture with lower energy consumption from the traditional power generation system.

Liqiang Duan; Jingnan Zhu; Long Yue; Yongping Yang

2014-01-01T23:59:59.000Z

151

Comparison of Life Cycle Carbon Dioxide Emissions and Embodied Energy in Four Renewable Electricity Generation Technologies in New Zealand  

Science Journals Connector (OSTI)

Comparison of Life Cycle Carbon Dioxide Emissions and Embodied Energy in Four Renewable Electricity Generation Technologies in New Zealand ... Fugitive emissions from geothermal fields were noted, though not added to the result for geothermal power generation, but all other CO2 emissions pertaining to this study arose from construction, maintenance, and decommissioning of power stations, since renewable technologies (apart from geothermal) do not emit CO2 during normal operation. ... Hondo, H. Life cycle GHG emission analysis of power generation systems: Japanese case Energy 2005, 30 ( 11?12 SPEC. ...

Bridget M. Rule; Zeb J. Worth; Carol A. Boyle

2009-07-16T23:59:59.000Z

152

Influence of outer rust layers on corrosion of carbon steel and weathering steel during wetdry cycles  

Science Journals Connector (OSTI)

Abstract The influence of the rust layers of carbon steel and weathering steel on the corrosion were investigated. It was found that corrosion of carbon steel slows down when its outer rust layer is removed. This phenomenon might be attributed to the shortening of the wetting time in wetdry cycles when the outer rust layers are removed. What is more, growth time of the corrosion products is shortened as well, which results in the formation of the fine corrosion products. However, the behavior of corrosion of weathering steel is not obviously influenced by the outer rust layer and the wetting time.

Xu Zhang; Shanwu Yang; Wenhua Zhang; Hui Guo; Xinlai He

2014-01-01T23:59:59.000Z

153

Development of a dynamic simulator for a natural gas combined cycle (NGCC) power plant with post-combustion carbon capture  

SciTech Connect (OSTI)

The AVESTAR Center located at the U.S. Department of Energys National Energy Technology Laboratory and West Virginia University is a world-class research and training environment dedicated to using dynamic process simulation as a tool for advancing the safe, efficient and reliable operation of clean energy plants with CO{sub 2} capture. The AVESTAR Center was launched with a high-fidelity dynamic simulator for an Integrated Gasification Combined Cycle (IGCC) power plant with pre-combustion carbon capture. The IGCC dynamic simulator offers full-scope Operator Training Simulator (OTS) Human Machine Interface (HMI) graphics for realistic, real-time control room operation and is integrated with a 3D virtual Immersive Training Simulator (ITS), thus allowing joint control room and field operator training. The IGCC OTS/ITS solution combines a gasification with CO{sub 2} capture process simulator with a combined cycle power simulator into a single high-performance dynamic simulation framework. This presentation will describe progress on the development of a natural gas combined cycle (NGCC) dynamic simulator based on the syngas-fired combined cycle portion of AVESTARs IGCC dynamic simulator. The 574 MW gross NGCC power plant design consisting of two advanced F-class gas turbines, two heat recovery steam generators (HRSGs), and a steam turbine in a multi-shaft 2x2x1 configuration will be reviewed. Plans for integrating a post-combustion carbon capture system will also be discussed.

Liese, E.; Zitney, S.

2012-01-01T23:59:59.000Z

154

Twentieth-Century Droughts and Their Impacts on Terrestrial Carbon Cycling in China  

Science Journals Connector (OSTI)

Midlatitude regions experienced frequent droughts during the twentieth century, but their impacts on terrestrial carbon balance are unclear. This paper presents a century-scale study of drought effects on the carbon balance of terrestrial ...

Jingfeng Xiao; Qianlai Zhuang; Eryuan Liang; Xuemei Shao; A. David McGuire; Aaron Moody; David W. Kicklighter; Jerry M. Melillo

2009-09-01T23:59:59.000Z

155

Reducing the Carbon Footprint of Commercial Refrigeration Systems Using Life Cycle Climate Performance Analysis: From System Design to Refrigerant Options  

SciTech Connect (OSTI)

In this paper, Life Cycle Climate Performance (LCCP) analysis is used to estimate lifetime direct and indirect carbon dioxide equivalent gas emissions of various refrigerant options and commercial refrigeration system designs, including the multiplex DX system with various hydrofluorocarbon (HFC) refrigerants, the HFC/R744 cascade system incorporating a medium-temperature R744 secondary loop, and the transcritical R744 booster system. The results of the LCCP analysis are presented, including the direct and indirect carbon dioxide equivalent emissions for each refrigeration system and refrigerant option. Based on the results of the LCCP analysis, recommendations are given for the selection of low GWP replacement refrigerants for use in existing commercial refrigeration systems, as well as for the selection of commercial refrigeration system designs with low carbon dioxide equivalent emissions, suitable for new installations.

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

2013-01-01T23:59:59.000Z

156

Black carbon in the Gulf of Maine : new insights into inputs and cycling of combustion-derived organic carbon  

E-Print Network [OSTI]

Emissions of black carbon (BC), the soot and char formed during incomplete combustion of fossil and biomass fuels, have increased over the last century and are estimated to be between 8 and 270 Tg BC/yr. BC may affect ...

Flores Cervantes, Dborah Xanat, 1978-

2008-01-01T23:59:59.000Z

157

Introduction to special section on North Pacific Carbon Cycle Variability and Climate Change  

E-Print Network [OSTI]

dissolved inorganic carbon and temperature driven variations in the seawater pCO2 tend to compensate each., 111, C07S01, doi:10.1029/2006JC003532. 1. Background [2] Air-sea exchange and storage of carbon contribution to the global oceanic storage of anthropogenic CO2 [Sabine et al., 2002, 2004b]. [4] Evidence

Gruber, Nicolas

158

Date Issue Brief # ISSUE BRIEF Natural Gas: A Bridge to a Low?Carbon Future?  

E-Print Network [OSTI]

Issue Brief 09?11Resources for the Future Resources for the Future is an independent, nonpartisan think tank that, through its social science research, enables policymakers and stakeholders to make better, more informed decisions about energy, environmental, natural resource, and public health issues. Headquartered in Washington, DC, its research scope comprises programs in nations around the world.

Stephen P. A. Brown; Alan J. Krupnick; Margaret A. Walls; Stephen P. A. Brown; Alan J. Krupnick; Margaret A. Walls

2009-01-01T23:59:59.000Z

159

Development and application of a steady state code for supercritical carbon dioxide cycles  

E-Print Network [OSTI]

The supercritical CO2 power conversion system is of interest for advanced nuclear reactor applications because the same efficiencies are obtained as for the most developed of the closed gas-turbine cycles (helium-Brayton), ...

Legault, David M. (David Michael)

2006-01-01T23:59:59.000Z

160

A Framework to Analyze the Reduction Potential of Life Cycle Carbon Dioxide Emissions of Passenger Cars  

Science Journals Connector (OSTI)

Automobile manufacturers are increasingly obligated to reduce the greenhouse gas emissions of their vehicle fleets. In this paper a framework to analyze the reduction potential of the life cycle CO2 emissions of ...

Christoph Herrmann; Karsten Kieckhfer

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "future carbon 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

Project Profile: High-Efficiency Receivers for Supercritical Carbon Dioxide Cycles  

Broader source: Energy.gov [DOE]

Brayton Energy, under the 2012 SunShot Concentrating Solar Power (CSP) R&D FOA, is building and testing a new solar receiver that uses supercritical carbon dioxide (s-CO2) as the heat-transfer...

162

The Application of Carbon Print Analysis Method Based on Life Cycle in Accommodation Service Products  

Science Journals Connector (OSTI)

With the increasing attention of the international community, the greenhouse effect had make serious threat on humans living environment and economic development. Carbon emission is the main reason of greenho...

Lei Liu; Run-liang Dou; Hui Zheng

2013-01-01T23:59:59.000Z

163

Terrestrial Carbon Cycle: Climate Relations in Eight CMIP5 Earth System Models  

Science Journals Connector (OSTI)

Eight Earth System Models from phase 5 of the Coupled Model Intercomparison Project (CMIP5) are evaluated, focusing on both the net carbon dioxide flux and its components and their relation with climatic variables (temperature, precipitation, and ...

Pu Shao; Xubin Zeng; Koichi Sakaguchi; Russell K. Monson; Xiaodong Zeng

2013-11-01T23:59:59.000Z

164

Current and Future Carbon Budgets of Tropical Rain Forest: A Cross Scale Analysis. Final Report  

SciTech Connect (OSTI)

The goal of this project was to make a first assessment of the major carbon stocks and fluxes and their climatic determinants in a lowland neotropical rain forest, the La Selva Biological Station, Costa Rica. Our research design was based on the concurrent use of several of the best available approaches, so that data could be cross-validated. A major focus of our effort was to combine meteorological studies of whole-forest carbon exchange (eddy flux), with parallel independent measurements of key components of the forest carbon budget. The eddy flux system operated from February 1998 to February 2001. To obtain field data that could be scaled up to the landscape level, we monitored carbon stocks, net primary productivity components including tree growth and mortality, litterfall, woody debris production, root biomass, and soil respiration in a series of replicated plots stratified across the major environmental gradients of the forest. A second major focus of this project was on the stocks and changes of carbon in the soil. We used isotope studies and intensive monitoring to investigate soil organic stocks and the climate-driven variation of soil respiration down the soil profile, in a set of six 4m deep soil shafts stratified across the landscape. We measured short term tree growth, climate responses of sap flow, and phenology in a suite of ten canopy trees to develop individual models of tree growth to daytime weather variables.

Oberbauer, S. F.

2004-01-16T23:59:59.000Z

165

A review on solar thermal syngas production via redox pair-based water/carbon dioxide splitting thermochemical cycles  

Science Journals Connector (OSTI)

Abstract The high power density, ease of transportation and storage and many years of development of internal combustion engine technologies have put liquid hydrocarbon fuels at a privileged position in our energy mix. Therefore processes that use renewable energy sources to produce liquid hydrocarbon fuels from H2O and CO2 are of crucial importance. Concentrated Solar Power (CSP) can be employed as the only energy source for the renewable production of hydrogen from water either indirectly, e.g. by supplying the electricity for electrolysis, or directly by supplying the necessary heat for thermochemically producing hydrogen. Among the various thermochemical cycles tested so far for CSP-driven hydrogen production via water splitting (WS), those based on redox-pair oxide systems, are directly adaptable to carbon dioxide splitting (CDS) and/or combined CO2/H2O splitting for the production of CO or syngas, respectively. The acknowledgement of this fact has recently revived the interest of the scientific community on such technologies. The current article presents the development, evolution and current status of CSP-aided syngas production via such redox-pair-based thermochemical cycles. At first the various redox oxide material compositions tested for water/carbon dioxide splitting are presented and their redox chemistries are discussed. Then the selection of suitable solar reactors is addressed in conjunction with the boundary conditions imposed by the redox systems as well as the heat demands, technical peculiarities and requirements of the cycle steps. The various solar reactor concepts proposed and employed for such reactions and their current status of development are presented. Finally, topics where further work is needed for commercialization of the technology are identified and discussed.

Christos Agrafiotis; Martin Roeb; Christian Sattler

2015-01-01T23:59:59.000Z

166

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

SciTech Connect (OSTI)

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

167

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

SciTech Connect (OSTI)

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

168

EIS-0431: Hydrogen Energy California's Integrated Gasification Combined Cycle and Carbon Capture and Sequestration Project, California  

Broader source: Energy.gov [DOE]

This EIS evaluates the potential environmental impacts of a proposal to provide financial assistance for the construction and operation of Hydrogen Energy California's LLC project, which would produce and sell electricity, carbon dioxide and fertilizer. DOE selected this project for an award of financial assistance through a competitive process under the Clean Coal Power Initiative program.

169

Quantification and Reduction of Critical Uncertainties Associated with Carbon Cycle-Climate System  

E-Print Network [OSTI]

GHG levels to physical and biological processes on land and in the oceans. We have prioritized our DATE: July 7, 2010 PROJECT END DATE: June 30, 2013 SPONSOR: US DOE, Office of Science, Office of carbon dioxide and other greenhouse gases due to the direct influence of GHG concentrations

170

Oxygen as a control on seafloor biological communities and their roles in sedimentary carbon cycling  

E-Print Network [OSTI]

Oxygen as a control on seafloor biological communities and their roles in sedimentary carbon experiments were conducted at sites spanning the steep oxygen, organic matter, and biological community gradients across the Arabian Sea oxygen minimum zone, in order to quantify the role that fauna play

171

Nitrogen cycling, plant biomass, and carbon dioxide evolution in a subsurface flow wetland  

E-Print Network [OSTI]

to ascertain the fate of nitrogen in a constructed wetland and the rate of bioremediation as indicated by carbon dioxide evolution. Research included a study of nitrogen uptake by plants and nitrification. A tracer isotope of nitrogen,?N, was used to follow...

Lane, Jeffrey J

2012-06-07T23:59:59.000Z

172

Experience from the Short Course on Introduction to Nuclear Chemistry and Fuel Cycle Separations and Future Educational Opportunities  

Broader source: Energy.gov (indexed) [DOE]

Short Course - Short Course - Overview & Lessons Learned David Kosson, Vanderbilt & CRESP Introduction to Nuclear Chemistry and Fuel Cycle Separations December 16-18, 2008 Vanderbilt University Vanderbilt University Dept. of Civil and Environmental Engineering safety performance cleanup closure M E Environmental Management Environmental Management 1 Course Objective To provide an introduction to the chemistry and p y separations processes of importance to entire nuclear fuel cycle. Targeted Audience: * Professionals in management, oversight and regulation of nuclear processes and facilities. * Graduate students in engineering and sciences planning a career focused on nuclear processes. focused on nuclear processes. * As an introduction for professionals that will be engaged in nuclear

173

The National Ignition Facility: The Path to a Carbon-Free Energy Future  

SciTech Connect (OSTI)

The National Ignition Facility (NIF), the world's largest and most energetic laser system, is now operational at Lawrence Livermore National Laboratory (LLNL). The NIF will enable exploration of scientific problems in national strategic security, basic science and fusion energy. One of the early NIF goals centers on achieving laboratory-scale thermonuclear ignition and energy gain, demonstrating the feasibility of laser fusion as a viable source of clean, carbon-free energy. This talk will discuss the precision technology and engineering challenges of building the NIF and those we must overcome to make fusion energy a commercial reality.

Stolz, C J

2011-03-16T23:59:59.000Z

174

Economic comparison between coal-fired and liquefied natural gas combined cycle power plants considering carbon tax: Korean case  

Science Journals Connector (OSTI)

Economic growth is main cause of environmental pollution and has been identified as a big threat to sustainable development. Considering the enormous role of electricity in the national economy, it is essential to study the effect of environmental regulations on the electricity sector. This paper aims at making an economic analysis of Korea's power plant utilities by comparing electricity generation costs from coal-fired power plants and liquefied natural gas (LNG) combined cycle power plants with environmental consideration. In this study, the levelized generation cost method (LGCM) is used for comparing economic analysis of power plant utilities. Among the many pollutants discharged during electricity generation, this study principally deals with control costs related only to CO2 and NO2, since the control costs of SO2 and total suspended particulates (TSP) are already included in the construction cost of utilities. The cost of generating electricity in a coal-fired power plant is compared with such cost in a LNG combined cycle power plant. Moreover, a sensitivity analysis with computer simulation is performed according to fuel price, interest rates and carbon tax. In each case, these results can help in deciding which utility is economically justified in the circumstances of environmental regulations.

Suk-Jae Jeong; Kyung-Sup Kim; Jin-Won Park; Dong-soon Lim; Seung-moon Lee

2008-01-01T23:59:59.000Z

175

Equatorial Pacific Sediment Deposition during the Early to Middle Miocene: Carbon Cycling and Proxies for Productivity  

E-Print Network [OSTI]

trough [Shipboard Scientific Party, Init. Repts. DSDP 574, 1985]. Four holes were cored: Hole 574 cored from 0 ? 206.5 mbsf, Hole 574A cored from 0 - 180.2 m in length (100% recovery) and Hole 574C cored from 194.5 to 525.5 mbsf (58% recovery); Hole B... recovered only 9.5 m of core. Sediments from both Holes A and C are dominantly calcareous ooze. Siliceous microfossils are a typical component (2-30%, 7 Table 1) and make up the majority of the non-carbonate sediment fraction [Mayer et al., 1986...

Piela, Christine Marie

2012-02-14T23:59:59.000Z

176

Project Title: Carbon cycling at the landscape scale: the effect of changes in climate and fire frequency on age distribution, stand structure, and net ecosystem production.  

E-Print Network [OSTI]

Project Title: Carbon cycling at the landscape scale: the effect of changes in climate and fire: Our project addresses Task 1 in RFP 2003-1. Climate, fire (frequency and intensity), and forest@mhub.zoology.wisc.edu, 4 Tinker@uwyo.edu Duration of Project: 3 years Annual Funding Requested from the Joint Fire Science

Turner, Monica G.

177

GIS Data Services Specialist Forest disturbance and carbon cycling Location: Newton Square, Pennsylvania (U.S. Forest Service Northern Research Station)  

E-Print Network [OSTI]

GIS Data Services Specialist ­ Forest disturbance and carbon cycling Location: Newton Square Geographic Information System (GIS) and data management support for developing spatial databases sets and in applying analysis techniques and models within a GIS framework. A Master's or PhD degree

Lichstein, Jeremy W.

178

Life cycle analysis of a building-integrated solar thermal collector, based on embodied energy and embodied carbon methodologies  

Science Journals Connector (OSTI)

Abstract The present study is a life cycle analysis of a patented building-integrated solar thermal collector which was developed/experimentally tested at the University of Corsica, in France, with the concept integration into gutters/no visual impact. Three configurations (reference and two alternatives) are evaluated. The life-cycle impact assessment methodologies of embodied energy (EE)/embodied carbon (EC), two databases and multiple scenarios are adopted. The results reveal that the reference system can considerably improve its environmental performance by utilizing collectors connected in parallel. The Energy Payback Time of the reference system decreases to less than 2 years by parallel connection while it is around 0.5 years if recycling is also adopted. The EE of the systems is around 3GJprim/m2 and it is reduced to around 0.40.5GJprim/m2 by recycling. The EC of the configurations is approximately 0.16tCO2.eq/m2 without recycling and around 0.020.03tCO2.eq/m2 with recycling. CO2.eq emissions are strongly related with electricity mix. A reduction 2896% in CO2.eq emissions of the systems is achieved by adopting configurations with double collector surface/output. Concerning indicator of sustainability, the system with parallel connection shows a value of 0.78. The findings of the present investigation could be utilized for the design of building-integrated solar thermal systems as well as for research purposes.

Chr. Lamnatou; G. Notton; D. Chemisana; C. Cristofari

2014-01-01T23:59:59.000Z

179

Development of pyro-processing technology at CRIEPI for carving out the future of nuclear fuel cycle  

SciTech Connect (OSTI)

Pyro-processing has been attracting increasing attention as a promising candidate as an advanced nuclear fuel cycle technology. It provides economic advantage as well as reduction in proliferation risk and burden of long live radioactive waste, especially when it is combined with advanced fuels such as metallic or nitride fuel which gives excellent burning efficiency of minor actinides (MA). CRIEPI has been developing pyro-processing technology since late eighties with both domestic and international collaborations. In the early stage, electrochemical and thermodynamic properties in LiCl-KCl eutectic melt, and fundamental feasibility of core technology like electrorefining were chiefly investigated. Currently, stress in the process chemistry development is also placed on supporting technologies, such as treatment of anode residue and high temperature distillation for cathode product from electrorefining, and so on. Waste treatment process development, such as studies on adsorption behavior of various FP elements into zeolite and conditions for the fabrication of glass-bonded sodalite waste form, are steadily improved as well. In parallel, dedicated pyro-processing equipment such as zeolite column for treatment of spent electro-refiner salt is currently in progress. Recently, an integrated engineering-scale fuel cycle tests were performed funded by Japanese government (MEXT) as an important step before proceeding to large scale hot demonstration of pyro-processing. Oxide fuels can be readily introduced into the pyro-processing by reducing them to metals by adoption of electrochemical reduction technique. Making use of this advantage, the pyro-processing is currently under preliminary evaluation for its applicability to the treatment of the corium, mainly consisting of (U,Zr)O{sub 2}, formed in different composition during the accident of the Fukushima Daiichi nuclear power plant. (authors)

Iizuka, M.; Koyama, T.; Sakamura, Y.; Uozumi, K.; Fujihata, K.; Kato, T.; Murakami, T.; Tsukada, T. [Central Research Institute of Electric Power Industry, Komae-shi, Tokyo 201-8511 (Japan); Glatz, J.P. [European Commission, JRC, Institute for Transuranium Elements (Germany)

2013-07-01T23:59:59.000Z

180

Modelling and simulation of CO2 (carbon dioxide) bottoming cycles for offshore oil and gas installations at design and off-design conditions  

Science Journals Connector (OSTI)

Abstract Improved energy efficiency is an issue of increasing importance in offshore oil and gas installations. The power on offshore installations is generated by gas turbines operating in a simple cycle. There is an obvious possibility for heat recovery for further power generation from the exhaust heat. However, the limited space and weight available makes the inclusion of bottoming cycles challenging. Due to its high working pressure and thereby compact components CO2 (carbon dioxide) could be a viable solution, combining compactness and efficiency. An in-house simulation tool is used to evaluate the performance of CO2 bottoming cycles at design and off-design conditions. Both a simple recuperated single stage cycle and a more advanced dual stage system are modelled. Results from simulations show a potential for 1011%-points increase in net plant efficiency at 100% gas turbine load. Also off-design simulations taking the variation in heat exchanger performance into account are performed showing that the bottoming cycle improves the off-design performance compared to the standard gas turbine solution. Even at 60% GT (gas turbine) load, the combined cycle with CO2 bottoming cycle can achieve up to 45% net plant efficiency, compared to 31% for only the gas turbine.

Harald Taxt Walnum; Petter Neks; Lars O. Nord; Trond Andresen

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "future carbon 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

Study of Adsorption of Methanol in an Activated Carbon and Carbon Nanotube Matrix for Use in a Solar Based Refrigeration Cycle  

E-Print Network [OSTI]

energy. Various adsorbent/adsorbate pairs have been tested in literature. The present work focuses on carbon nanotubes because theoretically, nanotubes should be able to adsorb better than activated carbon due to their high surface to volume ratios...

Sambath, Srivaths

2012-07-16T23:59:59.000Z

182

House Committee on Natural Resources The Future of Fossil Fuels: Geological and Terrestrial Sequestration of Carbon Dioxide  

E-Print Network [OSTI]

and Terrestrial Sequestration of Carbon Dioxide Howard Herzog Principal Research Engineer Massachusetts Institute to the Technical Group of the Carbon Sequestration Leadership Forum (see www.cslforum.org). Just two weeks ago, thank you for the opportunity to appear before you today to discuss Carbon Dioxide (CO2) geological

183

Carbon dioxide recovery from an integrated coal gasifier, combined cycle plant using membrane separation and a CO2 gas turbine  

Science Journals Connector (OSTI)

A scheme is described for electricity production based on coal gasification with recovery of carbon dioxide. In this scheme, coal is gasified into a coal gas, consisting mainly of hydrogen and carbon monoxide. A ...

Chris Hendriks

1994-01-01T23:59:59.000Z

184

Analysis and optimization of the Graz cycle : a coal fired power generation scheme with near-zero carbon dioxide emissions  

E-Print Network [OSTI]

Humans are releasing record amounts of carbon dioxide into the atmosphere through the combustion of fossil fuels in power generation plants. With mounting evidence that this carbon dioxide is a leading cause of global ...

Alexander, Brentan R

2007-01-01T23:59:59.000Z

185

Seasonal cycle of carbon dioxide and its isotopic composition in an urban atmosphere: Anthropogenic and biogenic effects  

E-Print Network [OSTI]

and soils on CO2 mixing ratio were quantified with a mass balance calculation using dual carbon and oxygen

Ehleringer, Jim

186

Biogeochemical cycling in an organic-rich coastal marine basin. 10. The role of amino acids in sedimentary carbon and nitrogen cycling  

SciTech Connect (OSTI)

Hydrolyzable amino acids were measured in cores and surface sediment samples collected over a 14 month period from the rapidly accumulating, anoxic sediments of Cape Lookout Bight, NC. The concentration of total hydrolyzable amino acids (THAAs) shows an exponential decrease with depth, in a manner similar to total organic carbon and total nitrogen. Carbon and nitrogen in THAAs averages 10-15% of the total organic carbon and 30-40% of the total nitrogen in these sediments. In surface sediments the concentration of THAAs do not show strong seasonal variations, with the exception of a small apparent decrease during the winter months. Aspartic acid, glutamic acid, glycine and alanine are the most abundant individual amino acids in Cape Lookout Bight sediments. The distribution of individual amino acids in these sediments is very similar to that observed in the two major sources of organic matter, vascular salt marsh plants and marine plankton. The mole fractions of most amino acids show no depth variation in Cape Lookout Bight sediments. Kinetic modeling of these data indicates that the deposition of amino acids to the surface of these sediments is 5.8 {plus minus} 1.0 mol{center dot}m{sup {minus}2}{center dot}yr{sup {minus}1}. Approximately 46 {plus minus} 16% of this input is remineralized in the upper 40 cm. The recycling of amino acids accounts for 82 {plus minus} 43% of the total nitrogen regeneration and 27 {plus minus} 11% of the regeneration of total organic carbon in these sediments. The mean residence time of metabolizable amino acids is approx. 9 months, a value which is comparable to the mean residence time of both metabolizable organic carbon and nitrogen in these sediments.

Burdige, D.J.; Martens, C.S. (Univ. of North Carolina, Chapel Hill (USA))

1988-06-01T23:59:59.000Z

187

Fuel Cycle Research & Development Documents | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Initiatives » Fuel Cycle Technologies » Fuel Cycle Research & Initiatives » Fuel Cycle Technologies » Fuel Cycle Research & Development » Fuel Cycle Research & Development Documents Fuel Cycle Research & Development Documents November 8, 2011 2011 Fuel Cycle Technologies Annual Review Meeting As the largest domestic source of low-carbon energy, nuclear power is making major contributions toward meeting our nation's current and future energy demands. The United States must continue to ensure improvements and access to this technology so we can meet our economic, environmental and energy security goals. We rely on nuclear energy because it provides a consistent, reliable and stable source of base load electricity with an excellent safety record in the United States. July 11, 2011 Nuclear Separations Technologies Workshop Report

188

System dynamics based models for selecting HVAC systems for office buildings: a life cycle assessment from carbon emissions perspective.  

E-Print Network [OSTI]

??This study aims to explore the life cycle environmental impacts of typical heating ventilation and air condition (HVAC) systems including variable air volume (VAV) system, (more)

Chen, S

2011-01-01T23:59:59.000Z

189

Estimation of net carbon sequestration potential of citrus under different management systems using the life cycle approach.  

E-Print Network [OSTI]

??A study was conducted to determine the net carbon sequestration potential of citrus to mitigate climate change. Perennial crops such as citrus have the potential (more)

Bwalya, jackson Mwamba

2013-01-01T23:59:59.000Z

190

E-Print Network 3.0 - anthropogenic iron cycles Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

iron cycle control atmospheric CO ? 12;The Global Carbon Cycle 70 times more carbon in ocean than... on ocean biological activity Iron cycle processes Modeling ... Source:...

191

Pyrolysis as a way to close a CFRC life cycle: Carbon fibers recovery and their use as feedstock for a new composite production  

Science Journals Connector (OSTI)

Pyrolysis is shown to be an efficient method for recycling carbon fiber composites in the form of both uncured prepregs scraps or as cured end-of-life objects. The pyrolytic process leads to different products in three physical states of matter. The gaseous fraction called syngas can be used as energy feedstock in the process itself. The oil fraction can be used as fuel or chemical feedstock. The solid residue contains substantially unharmed carbon fibers that can be isolated and recovered for the production of new composite materials thus closing the life cycle of the composite in a cradle to cradle approach. All the pyrolysis outputs were thoroughly analyzed and characterized in terms of composition for oil and gas fraction and surface characteristics of the fibers. In particular it is of paramount importance to correlate the aspect and properties of the fibers obtained with different composite feedstock and operational conditions that can be significantly different with the reinforcing performance in the newly produced Recycled Carbon Fibers Reinforced Polymers. Present results have been obtained on a pyrolysis pilot plant that offers the possibility of treating up to 70kg of materials thus leading to a significant amount of products to be tested in the further composites production focused mainly on chopped carbon fiber reinforcement.

2014-01-01T23:59:59.000Z

192

Regional environmental change: special issue on Modelling future changes in Cropland Soil Carbon in European Russia and the Ukraine  

Science Journals Connector (OSTI)

Many studies have examined the potential for climate mitigation in agriculture in Europe and globally, as well as in other regions of the world such as North America, but soil carbon sequestration potential for t...

Pete Smith

2007-06-01T23:59:59.000Z

193

Integrated life-cycle assessment of electricity-supply scenarios confirms global environmental benefit of low-carbon technologies  

Science Journals Connector (OSTI)

...7 Vintage capital modeling...18 Natural gas...plant (IGCC), and natural gas combined cycle power...CdTe Roadmap (29) Capital costs per m2 module $26 per...7920 MWh/yr Annual natural gas consumptiona 8900 0...

Edgar G. Hertwich; Thomas Gibon; Evert A. Bouman; Anders Arvesen; Sangwon Suh; Garvin A. Heath; Joseph D. Bergesen; Andrea Ramirez; Mabel I. Vega; Lei Shi

2014-01-01T23:59:59.000Z

194

Techno-economic analysis of sour gas oxy-fuel combustion power cycles for carbon capture and sequestration  

E-Print Network [OSTI]

The world's growing energy demand coupled with the problem of global warming have led us to investigate new energy sources that can be utilized in a way to reduce carbon dioxide emissions than traditional fossil fuel power ...

Chakroun, Nadim Walid

2014-01-01T23:59:59.000Z

195

High-resolution modeling of the western North American power system demonstrates low-cost and low-carbon futures  

E-Print Network [OSTI]

High-resolution modeling of the western North American power system demonstrates low-cost and low energy Carbon emissions a b s t r a c t Decarbonizing electricity production is central to reducing of resource cost scenarios, most coal power plants would be replaced by solar, wind, gas, and/or nuclear

Kammen, Daniel M.

196

Thermal cycling effect on the nanoparticle distribution and specific heat of a carbonate eutectic with alumina nanoparticles  

E-Print Network [OSTI]

. The concentration of alumina nanoparticles in this material was measured using neutron activation analysis. The average specific heat of the uncycled material was found to be 1.37 J/gC.The average specific heat of the thermally cycled material was between 1.7-2.1 J...

Shankar, Sandhya

2011-08-08T23:59:59.000Z

197

Sustainable Management of Carbon, Nutrients, and Agrichemicals through Cycling of Bioresources fom Bioenergy and Livestock Production and Municipalities  

E-Print Network [OSTI]

Bioenergy and Livestock Production and Municipalities Bioenergy and livestock industries and municipalities offer bioresources for sustained crop productivity and environmental quality. In the emerging bioenergy and a potential source of carbon· credits for bioenergy systems. Incorporation of the char by-product in soil can

198

Regional Impacts of Climate Change and Atmospheric CO2 on Future Ocean Carbon Uptake: A Multimodel Linear Feedback Analysis  

Science Journals Connector (OSTI)

The increase in atmospheric CO2 over this century depends on the evolution of the oceanic airsea CO2 uptake, which will be driven by the combined response to rising atmospheric CO2 itself and climate change. Here, the future oceanic CO2 uptake is ...

Tilla Roy; Laurent Bopp; Marion Gehlen; Birgit Schneider; Patricia Cadule; Thomas L. Frlicher; Joachim Segschneider; Jerry Tjiputra; Christoph Heinze; Fortunat Joos

2011-05-01T23:59:59.000Z

199

Role of Lignin in Reducing Life-Cycle Carbon Emissions, Water Use, and Cost for United States Cellulosic Biofuels  

Science Journals Connector (OSTI)

The grid electricity offset credits alone can reduce the life-cycle greenhouse gas (GHG) footprint of cellulosic ethanol by up to 20 g CO2e/MJ ethanol, in some cases resulting in a net negative GHG footprint. ... Case 2 represents a system in which the solids boiler and steam turbine from case 1 remain operational, but imported natural gas is used to operate an additional 65 MW gas turbine, resulting in a net power output of 50 MW. ... In each case, the capital costs for gas turbines are calculated on the basis of the gross power output rating. ...

Corinne D. Scown; Amit A. Gokhale; Paul A. Willems; Arpad Horvath; Thomas E. McKone

2014-07-02T23:59:59.000Z

200

Carbon-Optimal and Carbon-Neutral Supply Chains  

E-Print Network [OSTI]

in the life-cycle assessment (LCA) and carbon footprintingto integrate the economics- and LCA-based perspectives onto life-cycle assessment (LCA). The existing literature on

Caro, F.; Corbett, C. J.; Tan, T.; Zuidwijk, R.

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "future carbon 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

Circulating-Fluidized-Bed-Based Calcium-Looping Gasifier: Experimental Studies on the CalcinationCarbonation Cycle  

Science Journals Connector (OSTI)

With the first one, kinetic rates are developed for calcination in the presence of three media: nitrogen (N2), CO2, and steam (H2O). ... For this study, the particle size was taken to be 45 ?m.(1)(2)To study the effects of the particle size on calcination and carbonation reactions, limestone particles of sizes 325, 275, 230, and 135 ?m were subjected to calcination with N2 as the medium at 950 C. ... The gasifier was heated by a hot solid coming from the regenerator and by the fluidizing medium. ...

Bishnu Acharya; Animesh Dutta; Prabir Basu

2012-05-31T23:59:59.000Z

202

Energetic analysis of a syngas-fueled chemical-looping combustion combined cycle with integration of carbon dioxide sequestration  

Science Journals Connector (OSTI)

Abstract Chemical-looping combustion for power generation has significant advantages over conventional combustion. Mainly, it allows an integration of CO2 capture in the power plant without energy penalty; secondly, a less exergy destruction in the combustion chemical transformation is achieved, leading to a greater overall thermal efficiency. Most efforts have been devoted to systems based on methane as a fuel, although other systems for alternative fuels have can be proposed. This paper focus on the study of the energetic performance of this concept of combustion in a gas turbine combined cycle when synthesis gas is used as fuel. After optimization of some thermodynamic parameters of the cycle, the power plant performance is evaluated under diverse working conditions and compared to a conventional gas turbine system. Energy savings related with CO2 capture and storage have been quantified. The overall efficiency increase is found to be significant, reaching values of around 5% (even more in some cases). In order to analyze the influence of syngas composition on the results, different H2-content fuels are considered. In a context of real urgency to reduce green house gas emissions, this work is intended to contribute to the conceptual development of highly efficient alternative power generation systems.

ngel Jimnez lvaro; Ignacio Lpez Paniagua; Celina Gonzlez Fernndez; Rafael Nieto Carlier; Javier Rodrguez Martn

2014-01-01T23:59:59.000Z

203

The use of sustainable combined cycle technologies in Cyprus: a case study for the use of LOTHECO cycle  

Science Journals Connector (OSTI)

In this work, a costbenefit analysis concerning the use of the low temperature heat combined cycle (LOTHECO cycle) in Cyprus is carried out. Also, the expected main emissions from the LOTHECO cycle are compared with existing commercial technologies. In particular, the future generation system of Cyprus power industry is simulated by the independent power producers optimization algorithm and by the long-term expansion software Wien Automatic System Planning. Various conventional generation options are examined and compared with LOTHECO cycle parametric studies. The economic analysis, based on the assumptions used and the candidate technologies examined, indicated that in the case of conventional technologies the least cost solution is the natural gas combined cycle. Additional computer runs with the various LOTHECO cycle parametric studies indicated that for efficiencies greater than 60% and capital cost between 700 and 900 /kW, LOTHECO cycle is the least cost generation technology. Furthermore, the current state and future improvements of the environmental indicators of the power industry in Cyprus are presented. It is estimated that by the use of LOTHECO cycle instead of the business as usual scenario, the principal environmental indicators would be reduced by the year 2010 by approximately ?23% instead of ?8%. Further, the carbon dioxide environmental indicator will be reduced by +24% instead of +68%.

Andreas Poullikkas; Adonis Kellas

2004-01-01T23:59:59.000Z

204

Life Cycle Carbon Footprint of Re-Refined versus Base Oil That Is Not Re-Refined  

Science Journals Connector (OSTI)

The study showed that global warming potential was lower for all five re-refining techniques considered compared to the production of base oil in standard refineries. ... Safety-Kleen, the largest used oil re-refiner in North America, collects and re-refines used oil into approximately 100,000,000 gallons of base oil per year. ... Figure 4 presents the re-refined carbon footprint-based oil GHG emissions for re-refinery system yields of 50% (equivalent to two gallons of use over a gallon of base oils lifetime; 50% burden from virgin base oil input) to 100% (infinite re-refining; no burden from virgin base oil input). ...

Lisa N. Grice; Carolyn E. Nobel; Lin Longshore; Ramsay Huntley; Ashley L. DeVierno

2013-10-25T23:59:59.000Z

205

Black Carbons Properties and Role in the Environment: A Comprehensive Review  

E-Print Network [OSTI]

NOAA/ESRL. Mauna Loa Carbon Dioxide Annual Mean Data.H. Can reducing black carbon emissions counteract globalanalysis of black carbon in soils. Global Biogeochem. Cycle.

Shrestha, Gyami

2010-01-01T23:59:59.000Z

206

An Electricity-focused Economic Input-output Model: Life-cycle Assessment and Policy Implications of Future Electricity Generation Scenarios  

E-Print Network [OSTI]

of Future Electricity Generation Scenarios Joe Marriott Submitted in Partial Fulfillment of the Requirements chains and emission factors for the generation, transmission and distribution portions of the electricity, for electricity and for particular products, results show environmental impacts split up by generation type

207

The lifetime of excess atmospheric carbon dioxide  

SciTech Connect (OSTI)

Since the beginning of the industrial revolution human activity has significantly altered biogeochemical cycling on a global scale. The uncertainties of future climate change rests partly on issues of physical-climate system dynamics and their representation in general circulation models. However understanding the carbon cycle is a key to comprehending the changing terrestrial biosphere and to developing a reasonable range of future concentrations of greenhouse gases. The authors look at correction of model uncertainties in the examination of the lifetime of carbon dioxide. The two difficulties analysed are as follows: (1) most model-derived estimates of the relaxation of the concentration of CO2 reveal a function which is not always well approximated by weighted sums of exponentials; (2) the function c(t) is quite sensitive to assumptions about the terrestrial biosphere and the relaxation experiment. 51 refs., 15 figs., 7 tabs.

Moore, B. III; Braswell, B.H. (Univ. of New Hampshire, Durham, NH (United States))

1994-03-01T23:59:59.000Z

208

Study of alternatives for future operations of the naval petroleum and oil shale reserves, NOSR-2, Uintah and Carbon Counties, Utah. Final report  

SciTech Connect (OSTI)

The US Department of Energy (DOE) has asked Gustavson Associates, Inc. to serve as an Independent Petroleum Consultant and authorized a study and recommendations regarding future development of Naval Oil Shale Reserve No. 2 (NOSR-2) in Uintah and Carbon Counties, Utah. The US owns 100% of the mineral rights and about 60% of the surface rights in NOSR-2. The Ute Indian Tribe owns the other 40% of the surface. This 88,890-acre tract was set aside as an oil shale reserve for the US Navy by an Executive Order of President Wilson in 1916. Management of NOSR-2 is the responsibility of DOE. No drilling for oil and gas has occurred on the property and no production has been established. No reserves are present, although the area is hypothesized to overlay gas resources. Mapping by the US Geological Survey and others has resulted in speculative seismic leads for structures that may or may not hold conventional oil and gas. All of the mineral rights (including oil shale) must be considered exploratory and the mineral rights must be valued accordingly. The opinion recommended to maximize value to the US is Option 4, sale of the interest of the US of all or part of NOSR-2. Evaluation of this option results in an estimated value which is more than three times greater than the next highest estimated value, for Option 2, transfer to the Department of the Interior for leasing.

NONE

1996-12-01T23:59:59.000Z

209

HigHligHts Fossil Energy Techline, "DOE Announces Restructured FutureGen  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Announces Restructured FutureGen Announces Restructured FutureGen Approach to Demonstrate Carbon Capture and Storage Technology at Multiple Clean Coal Plants." On January 30, US Secretary of Energy Samuel W. Bodman announced a restructured approach to the FutureGen project, which involves the demonstration of carbon capture and storage (CCS) t e c h n o l o g y a t s e v e r a l commercial-scale Integrated Gasification Combined Cycle (IGCC) power plants. The US Department of Energy (DOE) said that the reorganized approach caps their financing at no more than the plant's CCS component, allowing for plants to be operational as early as 2015. Under this restructured approach, DOE believes that at least twice the amount of carbon dioxide

210

Carbon Cycle 2.0  

Broader source: Energy.gov (indexed) [DOE]

循环 2.0 循环 2.0 为可持续能源解决方案提供创新科学研究 人工光合作用 能源储存 燃烧技术 碳捕集和储存 发展中国家 能效 光伏太阳能板 生物燃料 能源分析 气候模拟 碳循环2.0是... 1. 愿景: * 碳循环2.0是一个与地球自然碳循环系统整合为一体的全球能源系统。 * 碳循环2.0是伯克利实验室各个研究领域共同追求的目标。 2. 这是一个项目发展规划,它将会加强我们的能力,并给予我们创 造更多影响力的机会。 3. 这是一个新的尝试,通过技术推广模式,将基础研究与实际应用

211

Warming accelerates decomposition of decades-old carbon in forest soils  

Science Journals Connector (OSTI)

...from the canisters on a vacuum line, graphitized for...Keck Carbon Cycle Accelerator Mass Spectrometer...atmospheric testing of nuclear weapons testing ended...Keck Carbon Cycle Accelerator Mass Spectrometer, University...Keck Carbon Cycle Accelerator Mass Spectrometer facility...

Francesca M. Hopkins; Margaret S. Torn; Susan E. Trumbore

2012-01-01T23:59:59.000Z

212

ENERGY WHITE PAPER Our energy future -  

E-Print Network [OSTI]

ENERGY WHITE PAPER Our energy future - creating a low carbon economy and consumers. And we stand up for fair and open markets in the UK, Europe and the world. #12;Our energy future ENERGY WHITE PAPER Our energy future - creating a low carbon economy 1 Foreword

213

Recovery of Carbon and Nitrogen Cycling and Microbial Community Functionality in a Post-Lignite Mining Rehabilitation Chronosequence in East Texas  

E-Print Network [OSTI]

al., 2005). Organic carbon is important for 4 many soil processes, like water and nutrient holding capacity. On a larger scale, soil carbon sequestration is important for mitigating increasing atmospheric CO2 concentrations. Nitrogen... in determining the microbially-driven portion of ecosystem recovery and its influence on soil carbon sequestration. For the nitrogen side of the organic matter equation, mineralization rates were evaluated to determine nitrogen turnover rates. Mineralization...

Ng, Justin

2012-10-19T23:59:59.000Z

214

AVESTAR® - Natural Gas Combined Cycle (NGCC) Dynamic Simulator  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Natural Gas Combined Cycle (NGCC) Dynamic Simulator Natural Gas Combined Cycle (NGCC) Dynamic Simulator A simulator that can provide future engineers with realistic, hands-on experience for operating advanced natural gas combined cycle (NGCC) power plants will soon be available at an innovative U.S. Department of Energy training center. Under a new cooperative research and development agreement signed by the Office of Fossil Energy's National Energy Technology Laboratory (NETL) and Invensys Operations Management, the partners will develop, test, and deploy a dynamic simulator and operator training system (OTS) for a generic NGCC power plant equipped for use with post-combustion carbon capture. NETL will operate the new dynamic simulator/OTS at the AVESTAR (Advanced Virtual Energy Simulation Training and Research) Center in Morgantown, W.Va.

215

2011 Fuel Cycle Technologies Annual Review Meeting | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

1 Fuel Cycle Technologies Annual Review Meeting 1 Fuel Cycle Technologies Annual Review Meeting 2011 Fuel Cycle Technologies Annual Review Meeting As the largest domestic source of low-carbon energy, nuclear power is making major contributions toward meeting our nation's current and future energy demands. The United States must continue to ensure improvements and access to this technology so we can meet our economic, environmental and energy security goals. We rely on nuclear energy because it provides a consistent, reliable and stable source of base load electricity with an excellent safety record in the United States. To support nuclear energy's continued and expanded role in our energy platform, therefore, the United States must continually improve its knowledge, technology, and policy in order to:

216

Perspectives on Carbon Capture and Sequestration in the United States  

E-Print Network [OSTI]

Community acceptance of carbon capture and sequestrationand realities of carbon capture and storage; www.eenews.net/Howard. What Future for Carbon Capture and Sequestration?

Wong-Parodi, Gabrielle

2011-01-01T23:59:59.000Z

217

ENERGY UTILIZATION AND ENVIRONMENTAL CONTROL TECHNOLOGIES IN THE COAL-ELECTRIC CYCLE  

E-Print Network [OSTI]

Fluidized-Bed Steam-Electric Steam-Electric Combined-CycleCombined-Cycle Current (1974) Future Future a Source:steam plants. The combined-cycle versions of advanced

Ferrell, G.C.

2010-01-01T23:59:59.000Z

218

DOE Takes Next Steps with Restructured FutureGen Approach | Department of  

Broader source: Energy.gov (indexed) [DOE]

with Restructured FutureGen Approach with Restructured FutureGen Approach DOE Takes Next Steps with Restructured FutureGen Approach May 7, 2008 - 11:30am Addthis Announces Draft Solicitation for Multiple Commercial-Scale Clean Coal Plants with Sequestration WASHINGTON, DC - The U.S. Department of Energy (DOE) today released a draft Funding Opportunity Announcement (FOA) to solicit public input on the demonstration of multiple commercial-scale Integrated Gasification Combined Cycle (IGCC) or other clean coal power plants with cutting-edge carbon capture and storage (CCS) technology under the Department's restructured FutureGen approach. The draft solicitation outlines the planned scope of the project, evaluation criteria, terms and conditions, and cost sharing requirements for public-private cooperation under FutureGen.

219

Recent Climate-Driven Increases in Vegetation Productivity for the Western Arctic: Evidence of an Acceleration of the Northern Terrestrial Carbon Cycle  

Science Journals Connector (OSTI)

Northern ecosystems contain much of the global reservoir of terrestrial carbon that is potentially reactive in the context of near-term climate change. Annual variability and recent trends in vegetation productivity across Alaska and northwest ...

J. S. Kimball; M. Zhao; A. D. McGuire; F. A. Heinsch; J. Clein; M. Calef; W. M. Jolly; S. Kang; S. E. Euskirchen; K. C. McDonald; S. W. Running

2007-02-01T23:59:59.000Z

220

Benefits and concerns of a closed nuclear fuel cycle  

SciTech Connect (OSTI)

Nuclear power can play an important role in our energy future, contributing to increasing electricity demand while at the same time decreasing carbon dioxide emissions. However, the nuclear fuel cycle in the United States today is unsustainable. As stated in the 1982 Nuclear Waste Policy Act, the U.S. Department of Energy is responsible for disposing of spent nuclear fuel generated by commercial nuclear power plants operating in a once-through fuel cycle in the deep geologic repository located at Yucca Mountain. However, unyielding political opposition to the site has hindered the commissioning process to the extant that the current administration has recently declared the unsuitability of the Yucca Mountain site. In light of this the DOE is exploring other options, including closing the fuel cycle through recycling and reprocessing of spent nuclear fuel. The possibility of closing the fuel cycle is receiving special attention because of its ability to minimize the final high level waste (HLW) package as well as recover additional energy value from the original fuel. The technology is, however, still very controversial because of the increased cost and proliferation risk it can present. To lend perspective on the closed fuel cycle alternative, this presents the arguments for and against closing the fuel cycle with respect to sustainability, proliferation risk, commercial viability, waste management, and energy security.

Widder, Sarah H.

2010-11-17T23:59:59.000Z

Note: This page contains sample records for the topic "future carbon 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

Carbon Dioxide and Methane Emissions from Estuaries  

Science Journals Connector (OSTI)

Carbon dioxide and methane emissions from estuaries are reviewed in relation with biogeochemical processes and carbon cycling. In estuaries, carbon dioxide and methane emissions show a large spatial and temporal ...

Gwenal Abril; Alberto Vieira Borges

2005-01-01T23:59:59.000Z

222

A Low-Carbon Fuel Standard for California, Part 1: Technical Analysis  

E-Print Network [OSTI]

Electricity Natural gas combined cycle and renewablecoal gasification combined cycle with carbon captureand storage Natural gas combined cycle Price change and

Farrell, Alexander E.; Sperling, Dan

2007-01-01T23:59:59.000Z

223

A Low-Carbon Fuel Standard for California Part 1: Technical Analysis  

E-Print Network [OSTI]

Electricity Natural gas combined cycle and renewablecoal gasification combined cycle with carbon captureand storage Natural gas combined cycle Price change and

2007-01-01T23:59:59.000Z

224

Photosynthesis and carbon dioxide fixation  

Science Journals Connector (OSTI)

Photosynthesis and carbon dioxide fixation ... Photosynthetic pigments, photosystems, the Calvin cycle, the Hatch-Slack pathway, photorespiration, and photosynthetic yield improvement. ...

Muriel B. Bishop; Carl B. Bishop

1987-01-01T23:59:59.000Z

225

The human carbon budget: an estimate of the spatial distribution of metabolic carbon consumption and release in the United States  

E-Print Network [OSTI]

West TO, Marland G (2002a) Net carbon ?ux from agriculturalmethodology for full carbon cycle analyses. Environ PollutG (2002b) A synthesis of carbon seques- tration, carbon

West, Tristram O.; Marland, Gregg; Singh, Nagendra; Bhaduri, Budhendra L.; Roddy, Adam B.

2009-01-01T23:59:59.000Z

226

Carbon isotope ratios of organic compound fractions in oceanic suspended particles  

E-Print Network [OSTI]

Radiocarbon evidence of fossil-carbon cycling in sediments1968), Metabolic fractionation of carbon isotopes in marineof particulate organic carbon using bomb 14 C, Nature,

Hwang, Jeomshik; Druffel, Ellen R. M

2006-01-01T23:59:59.000Z

227

In-operando hard X-ray photoelectron spectroscopy study on the impact of current compliance and switching cycles on oxygen and carbon defects in resistive switching Ti/HfO{sub 2}/TiN cells  

SciTech Connect (OSTI)

In this study, direct experimental materials science evidence of the important theoretical prediction for resistive random access memory (RRAM) technologies that a critical amount of oxygen vacancies is needed to establish stable resistive switching in metal-oxide-metal samples is presented. In detail, a novel in-operando hard X-ray photoelectron spectroscopy technique is applied to non-destructively investigates the influence of the current compliance and direct current voltage sweep cycles on the Ti/HfO{sub 2} interface chemistry and physics of resistive switching Ti/HfO{sub 2}/TiN cells. These studies indeed confirm that current compliance is a critical parameter to control the amount of oxygen vacancies in the conducting filaments in the oxide layer during the RRAM cell operation to achieve stable switching. Furthermore, clear carbon segregation towards the Ti/HfO{sub 2} interface under electrical stress is visible. Since carbon impurities impact the oxygen vacancy defect population under resistive switching, this dynamic carbon segregation to the Ti/HfO{sub 2} interface is suspected to negatively influence RRAM device endurance. Therefore, these results indicate that the RRAM materials engineering needs to include all impurities in the dielectric layer in order to achieve reliable device performance.

Sowinska, Malgorzata, E-mail: sowinska@ihp-microelectronics.com; Bertaud, Thomas; Walczyk, Damian; Calka, Pauline; Walczyk, Christian [IHP, Im Technologiepark 25, 15236 Frankfurt (Oder) (Germany); Thiess, Sebastian [Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg (Germany); Alff, Lambert [Institute of Materials Science, Technische Universitt Darmstadt, 64287 Darmstadt (Germany); Schroeder, Thomas [IHP, Im Technologiepark 25, 15236 Frankfurt (Oder) (Germany); Brandenburgische Technische Universitt, Konrad-Zuse-Strasse 1, 03046 Cottbus (Germany)

2014-05-28T23:59:59.000Z

228

System-of-systems iso-performance search to inform multi-actor policymaking to reduce aviation life cycle carbon emissions  

Science Journals Connector (OSTI)

This paper presents a system-of-systems formalism for modeling and analyzing multi-actor policymaking to achieve a global system objective. In contrast to a single optimal solution that aggregates objectives of actors, the concept of iso-performance ... Keywords: aviation life cycle emissions, iso-performance, multi-actor policymaking, system-of-systems

Datu B. Agusdinata; Daniel A. DeLaurentis

2009-10-01T23:59:59.000Z

229

Future Accelerators (?)  

E-Print Network [OSTI]

I describe the future accelerator facilities that are currently foreseen for electroweak scale physics, neutrino physics, and nuclear structure. I will explore the physics justification for these machines, and suggest how the case for future accelerators can be made.

John Womersley

2003-08-09T23:59:59.000Z

230

Background paper for "The 10-50 Solution: Technologies and Policies for a Low-Carbon Future" Pew Center & NCEP Conference, Washington, DC, March 25 26, 2004  

E-Print Network [OSTI]

School of Public Policy 310 Barrows Hall, University of California, Berkeley, CA 94720-3050 USA Email, and nations. Over the next five decades solar and wind energy could provide well over one third of electricity for a future requiring significantly more energy than the current global supply capacity of ~10 TW demand

Kammen, Daniel M.

231

Method of making carbon-carbon composites  

DOE Patents [OSTI]

A process for making 2D and 3D carbon-carbon composites having a combined high crystallinity, high strength, high modulus and high thermal and electrical conductivity. High-modulus/high-strength mesophase derived carbon fibers are woven into a suitable cloth. Layers of this easily graphitizible woven cloth are infiltrated with carbon material to form green composites. The carbonized composite is then impregnated several times with pitch by covering the composite with hot pitch under pressure. The composites are given a heat treatment between each impregnant step to crack up the infiltrated carbon and allow additional pitch to enter the microstructure during the next impregnation cycle. The impregnated composites are then given a final heat treatment in the range 2500.degree. to 3100.degree. C. to fully graphitize the fibers and the matrix carbon. The composites are then infiltrated with pyrolytic carbon by chemical vapor deposition in the range 1000.degree. C. to 1300.degree. C. at a reduced. pressure.

Engle, Glen B. (16716 Martincoit Rd., Poway, CA 92064)

1993-01-01T23:59:59.000Z

232

CARBON ISOTOPE STRATIGRAPHY AND DIAGENESIS OF PENNSYLVANIAN (DESMOINESIAN-MISSOURIAN) CARBONATES IN EAST-CENTRAL IDAHO  

E-Print Network [OSTI]

Carbon isotope stratigraphy of carbonate sediments is instrumental in examining major perturbations in the global carbon cycle and in correlating strata. However, the primary isotopic signal recorded in these sediments can vary with depositional...

Wood, Stephanie

2011-05-10T23:59:59.000Z

233

Developing Model Constraints on Northern Extra-Tropical Carbon Cycling Based on measurements of the Abundance and Isotopic Composition of Atmospheric CO2  

SciTech Connect (OSTI)

The objective of this project was to perform CO2 data syntheses and modeling activities to address two central questions: 1) how much has the seasonal cycle in atmospheric CO2 at northern high latitudes changed since the 1960s, and 2) how well do prognostic biospheric models represent these changes. This project also supported the continuation of the Scripps time series of CO2 isotopes and concentration at ten baseline stations distributed globally.

Keeling, Ralph [UCSD-SIO

2014-12-12T23:59:59.000Z

235

Carbon Nanotubes: Bearing Stress Like Never Before  

E-Print Network [OSTI]

A.J. (2013). Carbon Nanotubes: Present and Future CommercialP.M. (2008). Carbon Nanotubes. A. Jorio, G. Dresselhaus, &V.N. (2004). Carbon Nanotubes: properties and application.

Limaye, Aditya

2013-01-01T23:59:59.000Z

236

FutureGen: Pathway to Near-Zero Emissions and Sustainable Energy  

SciTech Connect (OSTI)

This presentation will highlight the U.S. Department of Energys (DOE) FutureGen project ? a $1 billion government-industry partnership to design, build, and operate a near-zero emissions coal-fueled power plant. The lead organization for the FutureGen initiative is the National Energy Technology Laboratory (NETL), a multi-purpose laboratory operated by the U.S. DOEs Office of Fossil Energy. NETL has a mission to conduct R&D from fundamental science to technology demonstration for resolving the environmental, supply, and reliability constraints of producing and using fossil energy resources. The commercial-scale FutureGen R&D facility is a pathway toward future fossil-energy power plants that will produce hydrogen and electricity while nearly eliminating emissions, including carbon dioxide. The 275-megawatt FutureGen plant will initiate operations around 2012 and employ advanced coal gasification technology integrated with combined cycle electricity generation, hydrogen production, and carbon capture and sequestration. Low carbon emissions would be achieved by integrating CO2 capture and sequestration operations with the power plant.

Zitney, S.E.; Sarkus, T.A

2007-11-04T23:59:59.000Z

237

Strike variability of carbonate platform margin stratal architecture and cycle stacking patterns: Outcrop and seismic examples from lower Permian depositional sequences of the Permian Basin, U. S. A  

SciTech Connect (OSTI)

Strike variability in stratal architecture, cycle stacking patterns and facies differentiation within sequences exemplifies the potential for differential stratigraphic response of platforms to eustasy. Variability exists within base-level cycles of several scales within a compound stratigraphic hierarchy, though the causes may vary among different scales. Cross-sections from outcrops in the Sierra Diablo document the framework and stacking pattern of 3rd-order sequences (HFS), including: two progradational middle Wolfcampian HFS (mW1-2), one backstepped upper Wolfcampian HFS (uW1), one progradational lower Leonardin HFS (L1), aggradational middle (L2) and upper Leonardian HFS (L3), three progradatic upper Leonardian HFS (L4-6), and two backstepped, aggradational upper Leonardian HFS (L7-8). Seismic lines from the northern Delaware and Midland Basins and San Simon Channel area document the regional consistency of 3rd-order sequence stacking patterns (a response to eustasy), but show variability related to local subsidence, antecedent topography (owing to deeper structures and platform margin erosion), windward vs. leeward facing, and siliciclastic sediment supply. Sequences L2 and L3 appear to exhibit the greatest variability in stacking pattern. Strike variability in 4th/5th-order cycle stacking patterns within 3rd-order sequences as studied in outcrop is greatest in sequences L2 and L3, in which headland-bight margin trends are developed on a lateral scale of 1-2 miles. Aggrational to backstepping reef-margin facies with steep ([le]35[degrees]) foreslopes developed along headlands. Mudstones abut these margin facies abruptly along headlands and may contain megabreccias at the toe-of-slope. More gently sloping (10-15[degrees]) [open quotes]ramp[close quotes] margin strata composed of fusulinid packstones characterize bights.

Fitchen, W.M. (Univ. of Texas, Austin, TX (United States))

1996-01-01T23:59:59.000Z

238

Microsoft PowerPoint - 6_Rowe-Future Challenges for Global Fuel...  

National Nuclear Security Administration (NNSA)

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...

239

Analysis of possible future atmospheric retention of fossil fuel CO/sub 2/  

SciTech Connect (OSTI)

This report investigates the likely rates and the potential range of future CO/sub 2/ emissions, combined with knowledge of the global cycle of carbon, to estimate a possible range of future atmospheric CO/sub 2/ concentrations through the year 2075. Historic fossil fuel usage to the present, growing at a rate of 4.5% per year until 1973 and at a slower rate of 1.9% after 1973, was combined with three scenarios of projected emissions growth ranging from approximately 0.2 to 2.8% per year to provide annual CO/sub 2/ emissions data for two different carbon cycle models. The emissions scenarios were constructed using an energy-economic model and by varying key parameters within the bounds of currently expected future values. The extreme values for CO/sub 2/ emissions in the year 2075 are 6.8 x 10/sup 15/ and 91 x 10/sup 15/ g C year/sup -1/. Carbon cycle model simulations used a range of year - 1800 preindustrial atmospheric concentrations of 245 to 292 ppM CO/sub 2/ and three scenarios of bioshere conversion as additional atmospheric CO/sub 2/ source terms. These simulations yield a range of possible atmospheric CO/sub 2/ concentrations in year 2075 of approximately 500 to 1500 ppM, with a median of about 700 ppM. The time at which atmospheric CO/sub 2/ would potentially double from the preindustrial level ranges from year 2025 to >2075. The practical, programmatic value of this forecast exercise is that it forces quantitative definition of the assumptions, and the uncertainties therein, which form the basis of our understanding of the natural biogeochemical cycle of carbon and both historic and future human influences on the dynamics of the global cycle. Assumptions about the possible range of future atmospheric CO/sub 2/ levels provide a basis on which to evaluate the implications of these changes on climate and the biosphere. 44 references, 17 figures, 21 tables.

Edmonds, J.A.; Reilly, J.; Trabalka, J.R.; Reichle, D.E.

1984-09-01T23:59:59.000Z

240

Tropical forest responses to increasing atmospheric CO2: current knowledge and opportunities for future research  

E-Print Network [OSTI]

their representation in Earth system models. Tropical forests play a significant role in the global carbon cycle

Bermingham, Eldredge

Note: This page contains sample records for the topic "future carbon 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

Supercritical CO2Brayton Cycle Control Strategy for Autonomous Liquid Metal-Cooled Reactors  

SciTech Connect (OSTI)

This presentation discusses a supercritical carbon dioxide brayton cycle control strategy for autonomous liquid metal-cooled reactors.

Moisseytsev, A.; Sienicki, J.J.

2004-10-06T23:59:59.000Z

242

NETL: Carbon Storage - Reference Shelf  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Carbon Storage > Reference Shelf Carbon Storage > Reference Shelf Carbon Storage Reference Shelf Below are links to Carbon Storage Program documents and reference materials. Each of the 10 categories has a variety of documents posted for easy access to current information - just click on the category link to view all related materials. RSS Icon Subscribe to the Carbon Storage RSS Feed. Carbon Storage Collage 2012 Carbon Utilization and Storage Atlas IV Carbon Sequestration Project Portfolio DOE/NETL Carbon Dioxide Capture and Storage RD&D Roadmap Public Outreach and Education for Carbon Storage Projects Carbon Storage Technology Program Plan Carbon Storage Newsletter Archive Impact of the Marcellus Shale Gas Play on Current and Future CCS Activities Site Screening, Selection, and Initial Characterization for Storage of CO2 in Deep Geologic Formations Carbon Storage Systems and Well Management Activities Monitoring, Verification, and Accounting of CO2 Stored in Deep Geologic Formations

243

Climate control of terrestrial carbon exchange across biomes and continents  

E-Print Network [OSTI]

Carbon Cycle Climate Model Intercomparison Project modelprojects are supported by the European Commission Directorate General XII Environment, Climate

Yi, C.; Ricciuota, D.; Goulden, M. L.

2010-01-01T23:59:59.000Z

244

Assessing net ecosystem carbon exchange of U S terrestrial ecosystems by integrating eddy covariance flux measurements and satellite observations  

SciTech Connect (OSTI)

More accurate projections of future carbon dioxide concentrations in the atmosphere and associated climate change depend on improved scientific understanding of the terrestrial carbon cycle. Despite the consensus that U.S. terrestrial ecosystems provide a carbon sink, the size, distribution, and interannual variability of this sink remain uncertain. Here we report a terrestrial carbon sink in the conterminous U.S. at 0.63 pg C yr 1 with the majority of the sink in regions dominated by evergreen and deciduous forests and savannas. This estimate is based on our continuous estimates of net ecosystem carbon exchange (NEE) with high spatial (1 km) and temporal (8-day) resolutions derived from NEE measurements from eddy covariance flux towers and wall-to-wall satellite observations from Moderate Resolution Imaging Spectroradiometer (MODIS). We find that the U.S. terrestrial ecosystems could offset a maximum of 40% of the fossil-fuel carbon emissions. Our results show that the U.S. terrestrial carbon sink varied between 0.51 and 0.70 pg C yr 1 over the period 2001 2006. The dominant sources of interannual variation of the carbon sink included extreme climate events and disturbances. Droughts in 2002 and 2006 reduced the U.S. carbon sink by 20% relative to a normal year. Disturbances including wildfires and hurricanes reduced carbon uptake or resulted in carbon release at regional scales. Our results provide an alternative, independent, and novel constraint to the U.S. terrestrial carbon sink.

Zhuang, Qianlai [Purdue University; Law, Beverly E. [Oregon State University; Baldocchi, Dennis [University of California, Berkeley; Ma, Siyan [University of California, Berkeley; Chen, Jiquan [University of Toledo, Toledo, OH; Richardson, Andrew [Harvard University; Melillo, Jerry [Marine Biological Laboratory; Davis, Ken J. [Pennsylvania State University; Hollinger, D. [USDA Forest Service; Wharton, Sonia [University of California, Davis; Falk, Matthias [University of California, Davis; Paw, U. Kyaw Tha [University of California, Davis; Oren, Ram [Duke University; Katulk, Gabriel G. [Duke University; Noormets, Asko [North Carolina State University; Fischer, Marc [Lawrence Berkeley National Laboratory (LBNL); Verma, Shashi [University of Nebraska; Suyker, A. E. [University of Nebraska, Lincoln; Cook, David R. [Argonne National Laboratory (ANL); Sun, G. [USDA Forest Service; McNulty, Steven G. [USDA Forest Service; Wofsy, Steve [Harvard University; Bolstad, Paul V [University of Minnesota; Burns, Sean [University of Colorado, Boulder; Monson, Russell K. [University of Colorado, Boulder; Curtis, Peter [Ohio State University, The, Columbus; Drake, Bert G. [Smithsonian Environmental Research Center, Edgewater, MD; Foster, David R. [Harvard University; Gu, Lianhong [ORNL; Hadley, Julian L. [Harvard University; Litvak, Marcy [University of New Mexico, Albuquerque; Martin, Timothy A. [University of Florida, Gainesville; Matamala, Roser [Argonne National Laboratory (ANL); Meyers, Tilden [NOAA, Oak Ridge, TN; Oechel, Walter C. [San Diego State University; Schmid, H. P. [Indiana University; Scott, Russell L. [USDA ARS; Torn, Margaret S. [Lawrence Berkeley National Laboratory (LBNL)

2011-01-01T23:59:59.000Z

245

Trade, transport, and sinks extend the carbon dioxide responsibility of countries: An editorial essay  

SciTech Connect (OSTI)

Globalization and the dynamics of ecosystem sinks need be considered in post-Kyoto climate negotiations as they increasingly affect the carbon dioxide concentration in the atmosphere. Currently, the allocation of responsibility for greenhouse gas mitigation is based on territorial emissions from fossil-fuel combustion, process emissions and some land-use emissions. However, at least three additional factors can significantly alter a country's impact on climate from carbon dioxide emissions. First, international trade causes a separation of consumption from production, reducing domestic pollution at the expense of foreign producers, or vice versa. Second, international transportation emissions are not allocated to countries for the purpose of mitigation. Third, forest growth absorbs carbon dioxide and can contribute to both carbon sequestration and climate change protection. Here we quantify how these three factors change the carbon dioxide emissions allocated to China, Japan, Russia, USA, and European Union member countries. We show that international trade can change the carbon dioxide currently allocated to countries by up to 60% and that forest expansion can turn some countries into net carbon sinks. These factors are expected to become more dominant as fossil-fuel combustion and process emissions are mitigated and as international trade and forest sinks continue to grow. Emission inventories currently in wide-spread use help to understand the global carbon cycle, but for long-term climate change mitigation a deeper understanding of the interaction between the carbon cycle and society is needed. Restructuring international trade and investment flows to meet environmental objectives, together with the inclusion of forest sinks, are crucial issues that need consideration in the design of future climate policies. And even these additional issues do not capture the full impact of changes in the carbon cycle on the global climate system.

Peters, Glen P [Center for International Climate and Energy Research (CICERO), Oslo, Norway; Marland, Gregg [ORNL; Hertwich, Edgar G. [Norwegian University of Science and Technology; Saikku, Laura [University of Helsinki

2009-01-01T23:59:59.000Z

246

The importance of use and end-of-life phases to the life cycle greenhouse gas (GHG) emissions of concrete A review  

Science Journals Connector (OSTI)

Abstract Global climate change is one of the most significant environmental impacts at the moment. One central issue for the building and construction industry to address global climate change is the development of credible carbon labelling schemes for building materials. Various carbon labelling schemes have been developed for concrete due to its high contribution to global greenhouse gas (GHG) emissions. However, as most carbon labelling schemes adopt cradle-to-gate as system boundary, the credibility of the eco-label information may not be satisfactory because recent studies show that the use and end-of-life phases can have a significant impact on the life cycle GHG emissions of concrete in terms of carbonation, maintenance and rehabilitation, other indirect emissions, and recycling activities. A comprehensive review on the life cycle assessment of concrete is presented to holistically examine the importance of use and end-of-life phases to the life cycle GHG quantification of concrete. The recent published ISO 14067: Carbon footprint of products requirements and guidelines for quantification and communication also mandates the use of cradle-to-grave to provide publicly available eco-label information when the use and end-of-life phases of concrete can be appropriately simulated. With the support of Building Information Modelling (BIM) and other simulation technologies, the contribution of use and end-of-life phases to the life cycle GHG emissions of concrete should not be overlooked in future studies.

Peng Wu; Bo Xia; Xianbo Zhao

2014-01-01T23:59:59.000Z

247

Lesson Summary Students will learn about different carbon  

E-Print Network [OSTI]

Lesson Summary Students will learn about different carbon sources and sinks and the release · Knowledge of carbon as the main constituent of living organisms AAAS Science Benchmarks The Physical Setting Materials · 1 copy of The Carbon Cycle (Figure 1) · 1 copy of The Carbon Cycle A4 sheet for each student · 1

Mojzsis, Stephen J.

248

Enhanced terrestrial carbon uptake in the Northern High Latitudes in the 21st century from the Coupled Carbon  

E-Print Network [OSTI]

the Coupled Carbon Cycle Climate Model Intercomparison Project model projections H A I F E N G Q I A N *, R E Carbon Cycle Climate Model Intercomparison Project. Our analysis suggests that the NHL will be a carbon the intense warming there enhances SOM decomposition, soil organic carbon (SOC) storage continues to increase

Zeng, Ning

249

Soil Carbon Modeling (Mac Post) A. Rothamsted model carbon pools and processes. Their approximate equivalents for the EBIS sample processing  

E-Print Network [OSTI]

' soil horizon show that model improvements need to be made to capture observed soil carbon cyclingSoil Carbon Modeling (Mac Post) A. Rothamsted model carbon pools and processes. Their approximate and transport processes. Testing and improvement of soil carbon cycling models is a key anticipated output

250

Cycle cover with short cycles Nicole Immorlica  

E-Print Network [OSTI]

Introduction Given a graph and a subset of marked elements (nodes, edges, or some combination thereof), a cycleCycle cover with short cycles Nicole Immorlica£ Mohammad Mahdian£ Vahab S. Mirrokni£ Abstract Cycle for variants of cycle covering problems which bound the size and/or length of the covering cycles

Immorlica, Nicole

251

Development Cycle Time Simulation For Civil Aircraft  

Science Journals Connector (OSTI)

Cycle Time Reduction (CTR) will be one of the major factors affecting the future of the civil aerospace industry. This focus is the end reflection of the level of competition in the commercial large carrier aircraft industry. Aircraft manufacturer must ...

Spitz William; Golaszewski Richard; Berardino Frank; Johnson Jesse

2001-01-01T23:59:59.000Z

252

Environmental biogeochemistry. V. 1: Carbon, nitrogen, phosphorus ...  

Science Journals Connector (OSTI)

V. 1: Carbon, nitrogen, phosphorus, sulfur and selenium cycles. V. 2: Metals transfer and ecological mass balances. Ann Arbor Sci. Publ., Inc., Ann. Arbor, Mich.

2000-01-06T23:59:59.000Z

253

Extension of the supercritical carbon dioxide brayton cycle to low reactor power operation: investigations using the coupled anl plant dynamics code-SAS4A/SASSYS-1 liquid metal reactor code system.  

SciTech Connect (OSTI)

Significant progress has been made on the development of a control strategy for the supercritical carbon dioxide (S-CO{sub 2}) Brayton cycle enabling removal of power from an autonomous load following Sodium-Cooled Fast Reactor (SFR) down to decay heat levels such that the S-CO{sub 2} cycle can be used to cool the reactor until decay heat can be removed by the normal shutdown heat removal system or a passive decay heat removal system such as Direct Reactor Auxiliary Cooling System (DRACS) loops with DRACS in-vessel heat exchangers. This capability of the new control strategy eliminates the need for use of a separate shutdown heat removal system which might also use supercritical CO{sub 2}. It has been found that this capability can be achieved by introducing a new control mechanism involving shaft speed control for the common shaft joining the turbine and two compressors following reduction of the load demand from the electrical grid to zero. Following disconnection of the generator from the electrical grid, heat is removed from the intermediate sodium circuit through the sodium-to-CO{sub 2} heat exchanger, the turbine solely drives the two compressors, and heat is rejected from the cycle through the CO{sub 2}-to-water cooler. To investigate the effectiveness of shaft speed control, calculations are carried out using the coupled Plant Dynamics Code-SAS4A/SASSYS-1 code for a linear load reduction transient for a 1000 MWt metallic-fueled SFR with autonomous load following. No deliberate motion of control rods or adjustment of sodium pump speeds is assumed to take place. It is assumed that the S-CO{sub 2} turbomachinery shaft speed linearly decreases from 100 to 20% nominal following reduction of grid load to zero. The reactor power is calculated to autonomously decrease down to 3% nominal providing a lengthy window in time for the switchover to the normal shutdown heat removal system or for a passive decay heat removal system to become effective. However, the calculations reveal that the compressor conditions are calculated to approach surge such that the need for a surge control system for each compressor is identified. Thus, it is demonstrated that the S-CO{sub 2} cycle can operate in the initial decay heat removal mode even with autonomous reactor control. Because external power is not needed to drive the compressors, the results show that the S-CO{sub 2} cycle can be used for initial decay heat removal for a lengthy interval in time in the absence of any off-site electrical power. The turbine provides sufficient power to drive the compressors. Combined with autonomous reactor control, this represents a significant safety advantage of the S-CO{sub 2} cycle by maintaining removal of the reactor power until the core decay heat falls to levels well below those for which the passive decay heat removal system is designed. The new control strategy is an alternative to a split-shaft layout involving separate power and compressor turbines which had previously been identified as a promising approach enabling heat removal from a SFR at low power levels. The current results indicate that the split-shaft configuration does not provide any significant benefits for the S-CO{sub 2} cycle over the current single-shaft layout with shaft speed control. It has been demonstrated that when connected to the grid the single-shaft cycle can effectively follow the load over the entire range. No compressor speed variation is needed while power is delivered to the grid. When the system is disconnected from the grid, the shaft speed can be changed as effectively as it would be with the split-shaft arrangement. In the split-shaft configuration, zero generator power means disconnection of the power turbine, such that the resulting system will be almost identical to the single-shaft arrangement. Without this advantage of the split-shaft configuration, the economic benefits of the single-shaft arrangement, provided by just one turbine and lower losses at the design point, are more important to the overall cycle performance. Therefore, the single-shaft

Moisseytsev, A.; Sienicki, J. J. (Nuclear Engineering Division)

2012-05-10T23:59:59.000Z

254

Future Yield Growth: What Evidence from Historical Data?  

E-Print Network [OSTI]

The potential future role of biofuels has become an important topic in energy legislation as it is seen as a potential low carbon alternative to conventional fuels. Hence, future yield growth is an important topic from ...

Gitiaux, Xavier

255

CARBON DIOXIDE FIXATION.  

SciTech Connect (OSTI)

Solar carbon dioxide fixation offers the possibility of a renewable source of chemicals and fuels in the future. Its realization rests on future advances in the efficiency of solar energy collection and development of suitable catalysts for CO{sub 2} conversion. Recent achievements in the efficiency of solar energy conversion and in catalysis suggest that this approach holds a great deal of promise for contributing to future needs for fuels and chemicals.

FUJITA,E.

2000-01-12T23:59:59.000Z

256

THE NUCLEAR FUEL CYCLE versus THE CARBON CYCLE  

Science Journals Connector (OSTI)

...license for the disposal of SNF and...at the Yucca Mountain site in Nevada...decades on the Yucca Mountain site in order...the initial funding that allowed...reprocessing and disposal of nuclear...repository at Yucca Mountain. One approach...

Rodney C. Ewing

257

Analysis of Strategies of Companies under Carbon Constraint: Relationship between Profit Structure of Companies and Carbon/Fuel Price Uncertainty  

E-Print Network [OSTI]

This paper examines the relationship between future carbon prices and the expected profit of companies by case studies with model companies. As the future carbon price will vary significantly in accordance with the political ...

Hashimoto, Susumu

258

Terrestrial biogeochemical feedbacks in the climate system: from past to future  

SciTech Connect (OSTI)

The terrestrial biosphere plays a major role in the regulation of atmospheric composition, and hence climate, through multiple interlinked biogeochemical cycles (BGC). Ice-core and other palaeoenvironmental records show a fast response of vegetation cover and exchanges with the atmosphere to past climate change, although the phasing of these responses reflects spatial patterning and complex interactions between individual biospheric feedbacks. Modern observations show a similar responsiveness of terrestrial biogeochemical cycles to anthropogenically-forced climate changes and air pollution, with equally complex feedbacks. For future conditions, although carbon cycle-climate interactions have been a major focus, other BGC feedbacks could be as important in modulating climate changes. The additional radiative forcing from terrestrial BGC feedbacks other than those conventionally attributed to the carbon cycle is in the range of 0.6 to 1.6 Wm{sup -2}; all taken together we estimate a possible maximum of around 3 Wm{sup -2} towards the end of the 21st century. There are large uncertainties associated with these estimates but, given that the majority of BGC feedbacks result in a positive forcing because of the fundamental link between metabolic stimulation and increasing temperature, improved quantification of these feedbacks and their incorporation in earth system models is necessary in order to develop coherent plans to manage ecosystems for climate mitigation.

Arneth, A.; Harrison, S. P.; Zaehle, S.; Tsigaridis, K; Menon, S; Bartlein, P.J.; Feichter, J; Korhola, A; Kulmala, M; O'Donnell, D; Schurgers, G; Sorvari, S; Vesala, T

2010-01-05T23:59:59.000Z

259

DOE Selects Projects to Develop Pre-Combustion Carbon Capture Technologies  

Broader source: Energy.gov (indexed) [DOE]

Develop Pre-Combustion Carbon Capture Develop Pre-Combustion Carbon Capture Technologies for Coal-Based Gasification Plants DOE Selects Projects to Develop Pre-Combustion Carbon Capture Technologies for Coal-Based Gasification Plants June 11, 2009 - 1:00pm Addthis Washington, DC - The U.S. Department of Energy (DOE) today announced the selection of nine projects that will develop pre-combustion carbon capture technologies that can reduce CO2 emissions in future coal-based integrated gasification combined cycle (IGCC) power plants. The projects, totaling nearly $14.4 million, will be managed by the Office of Fossil Energy's National Energy Technology Laboratory. Pre-combustion processes convert fossil fuels into a gaseous mixture of hydrogen and CO2 prior to combustion. The CO2 is then separated and the

260

Carbon Sequestration - Public Meeting  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Public Meeting Programmatic Environmental Impact Statement Public Meeting May 18, 2004 National Energy Technology Laboratory Office of Fossil Energy Scott Klara Carbon Sequestration Technology Manager Carbon Sequestration Program Overview * What is Carbon Sequestration * The Fossil Energy Situation * Greenhouse Gas Implications * Pathways to Greenhouse Gas Stabilization * Sequestration Program Overview * Program Requirements & Structure * Regional Partnerships * FutureGen * Sources of Information What is Carbon Sequestration? Capture can occur: * at the point of emission * when absorbed from air Storage locations include: * underground reservoirs * dissolved in deep oceans * converted to solid materials * trees, grasses, soils, or algae Capture and storage of CO 2 and other Greenhouse Gases that

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261

Trends and Future Challenges in Sampling the Deep Terrestrial Biosphere  

SciTech Connect (OSTI)

Research in the deep terrestrial biosphere is driven by interest in novel biodiversity and metabolisms, biogeochemical cycling, and the impact of human activities on this ecosystem. As this interest continues to grow, it is important to ensure that when subsurface investigations are proposed, materials recovered from the subsurface are sampled and preserved in an appropriate manner to limit contamination and ensure preservation of accurate microbial, geochemical, and mineralogical signatures. On February 20th, 2014, a workshop on Trends and Future Challenges in Sampling The Deep Subsurface was coordinated in Columbus, Ohio by The Ohio State University and West Virginia University faculty, and sponsored by The Ohio State University and the Sloan Foundations Deep Carbon Observatory. The workshop aims were to identify and develop best practices for the collection, preservation, and analysis of terrestrial deep rock samples. This document summarizes the information shared during this workshop.

Wilkins, Michael J.; Daly, Rebecca; Mouser, Paula J.; Trexler, Ryan; Sharma, Shihka; Cole, David R.; Wrighton, Kelly C.; Biddle , Jennifer F.; Denis, Elizabeth; Fredrickson, Jim K.; Kieft, Thomas L.; Onstott, T. C.; Peterson, Lee; Pfiffner, Susan M.; Phelps, Tommy J.; Schrenk, Matthew O.

2014-09-12T23:59:59.000Z

262

Power Systems Life Cycle Analysis Tool (Power L-CAT).  

SciTech Connect (OSTI)

The Power Systems L-CAT is a high-level dynamic model that calculates levelized production costs and tracks environmental performance for a range of electricity generation technologies: natural gas combined cycle (using either imported (LNGCC) or domestic natural gas (NGCC)), integrated gasification combined cycle (IGCC), supercritical pulverized coal (SCPC), existing pulverized coal (EXPC), nuclear, and wind. All of the fossil fuel technologies also include an option for including carbon capture and sequestration technologies (CCS). The model allows for quick sensitivity analysis on key technical and financial assumptions, such as: capital, O&M, and fuel costs; interest rates; construction time; heat rates; taxes; depreciation; and capacity factors. The fossil fuel options are based on detailed life cycle analysis reports conducted by the National Energy Technology Laboratory (NETL). For each of these technologies, NETL's detailed LCAs include consideration of five stages associated with energy production: raw material acquisition (RMA), raw material transport (RMT), energy conversion facility (ECF), product transportation and distribution (PT&D), and end user electricity consumption. The goal of the NETL studies is to compare existing and future fossil fuel technology options using a cradle-to-grave analysis. The NETL reports consider constant dollar levelized cost of delivered electricity, total plant costs, greenhouse gas emissions, criteria air pollutants, mercury (Hg) and ammonia (NH3) emissions, water withdrawal and consumption, and land use (acreage).

Andruski, Joel; Drennen, Thomas E.

2011-01-01T23:59:59.000Z

263

Global demographic trends and future carbon emissions  

Science Journals Connector (OSTI)

...multivariate analysis of energy requirements of households in Australia, Brazil, Denmark, India and Japan . Energy J (Cambridge, MA...failed to match primary energy targets from the IIASA...primary nu-clear and renewable source inputs to...

Brian C. O'Neill; Michael Dalton; Regina Fuchs; Leiwen Jiang; Shonali Pachauri; Katarina Zigova

2010-01-01T23:59:59.000Z

264

Carbon Nanotubes: Present and Future Commercial Applications  

Science Journals Connector (OSTI)

...of CNTs in thin-film electronics...large-area coatings. Although...for many applications, CNT yarns...deposition (CVD) is the...55). CNT thin-film transistors (TFTs...commercialization of CNT thin-film electronics...during spin-coating (60) and...Selected CNT applications in microelectronics...by aerosol CVD. [Schematic...

Michael F. L. De Volder; Sameh H. Tawfick; Ray H. Baughman; A. John Hart

2013-02-01T23:59:59.000Z

265

The Future of Low Carbon Transportation Fuels  

E-Print Network [OSTI]

" Nuclear" Oil resources" Unconventional:" oil shale liquid, " oil sands" Coal resources" Transport! Elec

Kammen, Daniel M.

266

Carbon Nanotubes: Present and Future Commercial Applications  

Science Journals Connector (OSTI)

...The International Technology Roadmap for Semiconductors suggests that...low flow resistance for both gases and liquids (75). This enhanced...CNT sensors have been used for gas and toxin detection in the...antiballistic vests, and wind turbine blades. However...

Michael F. L. De Volder; Sameh H. Tawfick; Ray H. Baughman; A. John Hart

2013-02-01T23:59:59.000Z

267

Carbon Nanotubes: Present and Future Commercial Applications  

Science Journals Connector (OSTI)

...thin-film electronics and large-area coatings. Although not yet providing compelling...of BMC Switzerland AG], antifouling coatings [Courtesy of NanoCyl], printed electronics...deposition of the solution, such as by spin-coating or printing. Moreover, because SWNT...

Michael F. L. De Volder; Sameh H. Tawfick; Ray H. Baughman; A. John Hart

2013-02-01T23:59:59.000Z

268

Global demographic trends and future carbon emissions  

Science Journals Connector (OSTI)

...traditional and commercial) Oil and natural gas Crude oil and primary natural gas Electricity Electricity, heat...and commercial sectors (as a substitute for electricity), nuclear...liquid fuels (ethanol), syngas, and hydrogen used by the...

Brian C. O'Neill; Michael Dalton; Regina Fuchs; Leiwen Jiang; Shonali Pachauri; Katarina Zigova

2010-01-01T23:59:59.000Z

269

Global demographic trends and future carbon emissions  

Science Journals Connector (OSTI)

...comparative multivariate analysis of energy requirements of households in Australia, Brazil, Denmark, India and Japan . Energy J (Cambridge, MA) 31 : 181...cross-sectional variations in total household energy requirements in India using...

Brian C. O'Neill; Michael Dalton; Regina Fuchs; Leiwen Jiang; Shonali Pachauri; Katarina Zigova

2010-01-01T23:59:59.000Z

270

Carbon Nanotubes: Present and Future Commercial Applications  

Science Journals Connector (OSTI)

...The International Technology Roadmap for Semiconductors...courtesy of Seldon Technologies] An upcoming application...resistance for both gases and liquids (75...vests, and wind turbine blades. However...of Standards and Technology developed a...

Michael F. L. De Volder; Sameh H. Tawfick; Ray H. Baughman; A. John Hart

2013-02-01T23:59:59.000Z

271

Nuclear-fuel-cycle policy and the future of nuclear power. Oversight hearing before the Subcommittee on Oversight and Investigations of the Committee on Interior and Insular Affairs, House of Representatives, Ninety-Seventh Congress, First Session, October 23, 1981  

SciTech Connect (OSTI)

Edward Teller, Ralph Nader, and a panel from Merrill Lynch, Pierce, Fenner, and Smith were among the 12 witnesses at this hearing on the Reagan administration's decision to eliminate the ban on plutonium reprocessing and its effect on the nuclear industry's future. Subcommittee Chairman Edward J. Markey asked for comments on safety question, recent plant cancellations, contributions that nuclear power can make in relieving oil dependence in the transportation sector, proliferation, and the inconsistency of subsidizing nuclear while imposing a free-market philosophy on solar, coal, and conservation. The testimony if followed by an appendix of additional material submitted for the record. (DCK)

Not Available

1982-01-01T23:59:59.000Z

272

Method of making carbon-carbon composites  

DOE Patents [OSTI]

A process for making a carbon-carbon composite having a combination of high crystallinity, high strength, high modulus and high thermal and electrical conductivity. High-modulus/high-strength mesophase derived carbon fibers are woven into a suitable cloth. Layers of this easily graphitizable woven cloth are covered with petroleum or coal tar pitch and pressed at a temperature a few degrees above the softening point of the pitch to form a green laminated composite. The green composite is restrained in a suitable fixture and heated slowly to carbonize the pitch binder. The carbonized composite is then impregnated several times with pitch by covering the composite with hot pitch under pressure. The composites are given a heat treatment between each impregnation step to crack up the infiltrated carbon and allow additional pitch to enter the microstructure during the next impregnation cycle. The impregnated composites are then given a final heat treatment in the range 2500.degree. to 3000.degree. C. to fully graphitize the fibers and the matrix carbon. The composites are then infiltrated with pyrolytic carbon by chemical vapor deposition in the range 1000.degree. to 1300.degree. C. at a reduced pressure for approximately one hundred and fifty (150) hours.

Engle, Glen B. (16716 Martincoit Rd., Poway, CA 92064)

1991-01-01T23:59:59.000Z

273

Fossil energy, clean coal technology, and FutureGen  

SciTech Connect (OSTI)

Future fossil use will rely heavily on carbon sequestration. Clean coal technologies are being incorporated in the USA, including air pollution control, and will need to incorporate carbon capture and sequestration. The paper ends with an outline of the restructured FutureGen project. 7 figs.

Sarkus, T.A.

2008-07-15T23:59:59.000Z

274

Integration of coal utilization and environmental control in integrated gasification combined cycle systems  

Science Journals Connector (OSTI)

Integration of coal utilization and environmental control in integrated gasification combined cycle systems ... The Cost of Carbon Capture and Storage for Natural Gas Combined Cycle Power Plants ... The Cost of Carbon Capture and Storage for Natural Gas Combined Cycle Power Plants ...

H. Christopher Frey; Edward S. Rubin

1992-10-01T23:59:59.000Z

275

Influence of a cyclonic eddy on microheterotroph biomass and carbon export in the lee of Hawaii  

E-Print Network [OSTI]

March 2003. [1] A multi-platform sampling strategy was used to investigate carbon cycling in a cold Oceanography: Biological and Chemical: Carbon cycling; 4855 Oceanography: Biological and Chemical: Plankton; 4866 Oceanography: Biological and Chemical: Sorptive scavenging; 4870 Oceanography: Biological

Hawai'i at Manoa, University of

276

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

SciTech Connect (OSTI)

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

277

CARBON-CARBON COMPOSITE ALLCOMP Carbon-Carbon Composite  

E-Print Network [OSTI]

CARBON-CARBON COMPOSITE ALLCOMP Carbon-Carbon Composite · C-C supplied in two forms · T300: C-C composite containing continuous PAN T300 fibers · SWB: Chopped Fiber Composite containing SWB fibers Crush strength 4340 steel, carbon-carbon composite, and Carbon-Silicon Carbide composite were tested to examine

Rollins, Andrew M.

278

ARM - Field Campaign - Aircraft Carbon  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

govCampaignsAircraft Carbon govCampaignsAircraft Carbon Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Campaign : Aircraft Carbon 2006.07.01 - 2008.09.30 Lead Scientist : Margaret Torn For data sets, see below. Description Airborne trace-gas measurements at ARM-SGP provided valuable data for addressing carbon-cycle questions highlighted by the US Climate Change Research Program and the North American Carbon Program. A set of carbon-cycle instruments and sample collection systems were added to an ARM-managed aircraft at ARM-SGP user facility. A separate (in-place) grant covered the cost of developing the instrument systems, analyzing the data, and ingesting all data to the ARM data archives. In the short-term (~1 y) we had two priorities. The first was to acquire

279

The Future of Natural Gas AN INTERDISCIPLINARY MIT STUDYForeword and Acknowledgements The Future of Natural Gas is the fourth in a  

E-Print Network [OSTI]

series of MIT multidisciplinary reports examining the role of various energy sources that may be important for meeting future demand under carbon dioxide (CO 2) emissions constraints. In each case, we explore the steps needed to enable competitiveness in a future marketplace conditioned by a CO 2 emissions price or by a set of regulatory initiatives. This report follows an interim report issued in June 2010. The first three reports dealt with nuclear power (2003), coal (2007) and the nuclear fuel cycle (2010 and 2011). A study of natural gas is more complex than these previous reports because gas is a major fuel for multiple end uses electricity, industry, heating and is increasingly discussed as a potential pathway to reduced oil dependence for transportation. In addition, the realization over the last few years that the producible unconventional gas resource in the U.S. is very large has intensified the discussion about natural gas as a bridge to a low-carbon future. Recent indications of a similarly large global gas shale resource may also transform the geopolitical landscape for gas. We have carried out the integrated analysis reported here as a contribution to the energy, security and climate debate. Our primary audience is U.S. government, industry and academic leaders, and decision makers. However, the study is carried out with an international perspective. invested in advising us. However, the study is the responsibility of the MIT study group and the advisory committee members do not necessarily endorse all of its findings and recommendations, either individually or collectively. Finally, we are very appreciative of the support from several sources. First and foremost, we thank the American Clean Skies Foundation. Discussions with the Foundation led to the conclusion that an integrative study on the future of natural gas in a carbon-constrained world could contribute to the energy debate in an important way, and the Foundation stepped forward as the major sponsor. MIT Energy

unknown authors

280

APPLICATION FORM FOR FREE LOCKED CYCLE This form is for staff or students who require a cycle parking space in a locked  

E-Print Network [OSTI]

guaranteed a cycle space. · Entry to locked cycle sheds will require the code to a combination lock. To avoidAPPLICATION FORM FOR FREE LOCKED CYCLE PARKING This form is for staff or students who require a cycle parking space in a locked facility. Please read the following notes and retain for future

Matthews, Adrian

Note: This page contains sample records for the topic "future carbon 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

Framtidens lantbruk / Future Agriculture Future Agriculture  

E-Print Network [OSTI]

Framtidens lantbruk / Future Agriculture Future Agriculture ­ Livestock, Crops and Land Use Report from a multidisciplinary research platform. Phase I (2009 ­ 2012) #12;Future Agriculture ­ Livestock Waldenström Utgivningsår: 2012, Uppsala Utgivare: SLU, Framtidens lantbruk/Future Agriculture Layout: Pelle

282

Biomass Gasification Combined Cycle  

SciTech Connect (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

283

Cycle Track Lessons Learned  

E-Print Network [OSTI]

Cycle Track Lessons Learned #12;Presentation Overview · Bicycling trends · Cycle track lessons learned · What is a "Cycle track"? · Essential design elements of cycle tracks Separation Width Crossing driveways & low-volume streets Signalized intersections #12;Trend in kilometers cycled per year

Bertini, Robert L.

284

Photovoltaics Life Cycle Analysis  

E-Print Network [OSTI]

Metrics of Life-Cycle Performance Energy Payback Times (EPBT) Greenhouse Gas Emissions (GHG) Toxic Gases #12;6 Life Cycle GHG Emissions ­EuropeLife Cycle GHG Emissions ­Europe Insolation: 1700 kwh/m2-yr 0 10 #12;7 Life Cycle GHG Emissions ­Comparison with Conventional Technologies Life Cycle GHG Emissions

285

Carbon-free generation  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Carbon-free generation Carbon-free generation Carbon-free central generation of electricity, either through fossil fuel combustion with carbon dioxide capture and storage or development of renewable sources such as solar, wind, and/or nuclear power, is key to our future energy portfolio. Brookhaven also provides tools and techniques for studying geological carbon dioxide sequestration and analyzing safety issues for nuclear systems. Our nation faces grand challenges: finding alternative and cleaner energy sources and improving efficiency to meet our exponentially growing energy needs. Researchers at Brookhaven National Laboratory are poised to meet these challenges with basic and applied research programs aimed at advancing the effective use of renewable energy through improved conversion,

286

Life Cycle Regulation of Transportation Fuels: Uncertainty and its Policy Implications  

E-Print Network [OSTI]

Cycle Assessment 10(1), 6876. NETL (2008). Development offossil carbon in the fuel (NETL, 2008). The upstream portionof the carbon in the fuel (NETL, 2008), which is directly

Plevin, Richard Jay

2010-01-01T23:59:59.000Z

287

Dynamics of carbon sequestration in a coastal wetland using radiocarbon measurements  

E-Print Network [OSTI]

Dynamics of carbon sequestration in a coastal wetland using radiocarbon measurements Yonghoon Choi1. Wang (2004), Dynamics of carbon sequestration in a coastal wetland using radiocarbon measurements carbon cycle. However, the dynamics of carbon (C) cycling in coastal wetlands and its response to sea

Wang, Yang

288

Control strategies for supercritical carbon dioxide power conversion systems  

E-Print Network [OSTI]

The supercritical carbon dioxide (S-C02) recompression cycle is a promising advanced power conversion cycle which couples well to numerous advanced nuclear reactor designs. This thesis investigates the dynamic simulation ...

Carstens, Nathan, 1978-

2007-01-01T23:59:59.000Z

289

NETL: Gasification Systems - Liquid Carbon Dioxide/Coal Slurry for Feeding  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Feed Systems Feed Systems Liquid Carbon Dioxide/Coal Slurry for Feeding Low-Rank Coal to Gasifiers Project Number: DE-FE0007977 There is increased interest in carbon capture and storage (CCS) for future coal-based power plants, and in a CCS integrated gasification plant, relatively pure, high pressure CO2 stream(s) will be available within the power plant. Electric Power Research Institute (EPRI) aims to help reduce the cost and improve the efficiency of integrated gasification combined cycle (IGCC) with CCS by using a portion of the high purity CO2 product stream as the carrier fluid to feed low rank coal (LRC) into the gasifier. EPRI proposes to confirm the potential advantages of LRC/liquid carbon dioxide (LCO2) slurries by: Conducting plant-wide technical and economic simulations.

290

Carbon footprint assessment of Western Australian LNG production and export to the Chinese market  

Science Journals Connector (OSTI)

In reviewing the carbon footprint of the production and transportation of 1m of LNG to China, this life cycle assessment (LCA) has confirmed that the production and liquefaction stage generates the most GHG emissions (45.4%) followed by the natural gas exploration and separation stage (39%) and the exportation and transportation stage (15.7%). The utilisation of wind power energy as a replacement of gas fired electricity generation could possibly reduce the 'energy consumption' related GHG emissions of LNG production by some 36-51%. Similarly, the utilisation of carbon capture and storage to sequester the GHG emitted during electricity production could potentially reduce 'energy consumption' related GHG emissions by 33-45%. This LCA will assist exporters, manufacturers, and suppliers in the LNG supply chain with enhanced environmental supply chain management and the management of any future carbon trading pressures on LNG markets.

Wahidul K. Biswas; Deborah Engelbrecht; Michele Rosano

2013-01-01T23:59:59.000Z

291

A Low-Carbon Fuel Standard for California, Part 1: Technical Analysis  

E-Print Network [OSTI]

110 Table 4-14: WESTCARB carbon capture and sequestrationThat $25 charge might make carbon capture and storage (CCS)combined cycle with carbon capture and storage Natural gas

Farrell, Alexander E.; Sperling, Dan

2007-01-01T23:59:59.000Z

292

A Low-Carbon Fuel Standard for California Part 1: Technical Analysis  

E-Print Network [OSTI]

110 Table 4-14: WESTCARB carbon capture and sequestrationThat $25 charge might make carbon capture and storage (CCS)combined cycle with carbon capture and storage Natural gas

2007-01-01T23:59:59.000Z

293

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

294

Offshore Rankine Cycles.  

E-Print Network [OSTI]

?? The title of the thesis - "Offshore Rankine Cycles" - is very general and cover a large range of engineering fields, e.g. thermodynamic cycles (more)

Brandsar, Jo

2012-01-01T23:59:59.000Z

295

The Organic Rankine Cycle  

Science Journals Connector (OSTI)

Chap. 3 is dedicated to Rankine cycles with organic fluids: the so-called organic Rankine cycles (ORC), which in recent years have ... of the use of...

Costante Mario Invernizzi

2013-01-01T23:59:59.000Z

296

Crystallographic Snapshots of Cyanide- and Water-Bound C-Clusters from Bifunctional Carbon Monoxide Dehydrogenase/Acetyl-CoA Synthase  

E-Print Network [OSTI]

Nickel-containing carbon monoxide dehydrogenases (CODHs) reversibly catalyze the oxidation of carbon monoxide to carbon dioxide and are of vital importance in the global carbon cycle. The unusual catalytic CODH C-cluster ...

Kung, Yan

297

Optimization of Air Conditioning Cycling  

E-Print Network [OSTI]

Benchmark Long Cycle .............................................................................................. 95 5.46 System Pressures and Temperatures Valve Part Cycle Vs Benchmark Long Cycle...

Seshadri, Swarooph

2012-10-19T23:59:59.000Z

298

Incorporating Carbon Capture and Storage Technologies in Integrated Assessment Models  

E-Print Network [OSTI]

Incorporating Carbon Capture and Storage Technologies in Integrated Assessment Models J. R. Mc climate policy analysis. This paper examines the representation of carbon capture and storage (CCS carbon capture and storage, 2) a natural gas combined cycle technology with carbon capture and storage 1

299

Technologies for Carbon Capture and Storage  

E-Print Network [OSTI]

FutureGen Technologies for Carbon Capture and Storage and Hydrogen and Electricity Production to optimize hydrogen production or carbon capture The prototype plant would be the world's 1st #12;24-Jun-03Gen? · The world's first plant [prototype] to: - Capture and permanently sequester carbon dioxide - Emit virtually

300

Nuclear Fuel Cycle Integrated System Analysis  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (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

Note: This page contains sample records for the topic "future carbon 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

A global coal production forecast with multi-Hubbert cycle analysis  

Science Journals Connector (OSTI)

Based on economic and policy considerations that appear to be unconstrained by geophysics, the Intergovernmental Panel on Climate Change (IPCC) generated forty carbon production and emissions scenarios. In this paper, we develop a base-case scenario for global coal production based on the physical multi-cycle Hubbert analysis of historical production data. Areas with large resources but little production history, such as Alaska and the Russian Far East, are treated as sensitivities on top of this base-case, producing an additional 125Gt of coal. The value of this approach is that it provides a reality check on the magnitude of carbon emissions in a business-as-usual (BAU) scenario. The resulting base-case is significantly below 36 of the 40 carbon emission scenarios from the IPCC. The global peak of coal production from existing coalfields is predicted to occur close to the year 2011. The peak coal production rate is 160EJ/y, and the peak carbon emissions from coal burning are 4.0GtC (15GtCO2) per year. After 2011, the production rates of coal and CO2 decline, reaching 1990 levels by the year 2037, and reaching 50% of the peak value in the year 2047. It is unlikely that future mines will reverse the trend predicted in this BAU scenario.

Tadeusz W. Patzek; Gregory D. Croft

2010-01-01T23:59:59.000Z

302

Life cycle sustainability assessment of UK electricity scenarios to 2070  

Science Journals Connector (OSTI)

Abstract Decarbonising the UK electricity mix is vital to achieving the national target of 80% reduction of greenhouse gas (GHG) emissions by 2050, relative to a 1990 baseline. Much work so far has focused only on costs and GHG emissions ignoring other sustainability issues. This paper goes beyond to assess the life cycle sustainability of different electricity scenarios for the UK, extending to 2070. The scenarios include the main technologies relevant to the UK: nuclear, gas, coal with and without carbon capture and storage (CCS), wind, solar photovoltaics and biomass. Three levels of decarbonisation are considered and the implications are assessed for techno-economic, environmental and social impacts on a life cycle basis. The results show that decarbonisation is likely to increase electricity costs despite anticipated future cost reductions for immature technologies. Conversely, sensitivity to volatile fuel prices decreases by two-thirds in all the scenarios with low-carbon technologies. To meet the GHG emission targets, coal CCS can only play a limited role, contributing 10% to the electricity mix at most; the use of CCS also increases other sustainability impacts compared to today, including worker injuries, large accident fatalities, depletion of fossil fuels and long-term waste storage. This calls into question the case for investing in coal CCS. A very low-carbon mix with nuclear and renewables provides the best overall environmental performance, but some impacts increase, such as terrestrial eco-toxicity. Such a mix also worsens some social issues such as health impacts from radiation and radioactive waste storage requirements. UK-based employment may more than double by 2070 if a renewables-intensive mix is chosen. However, the same mix also increases depletion of elements nearly seven-fold relative to the present, emphasising the need for end-of-life recycling. Very low-carbon mixes also introduce considerable uncertainty due to low dispatchability and grid instability. With equal weighting assumed for each sustainability impact, the scenario with an equal share of nuclear and renewables is ranked best.

Laurence Stamford; Adisa Azapagic

2014-01-01T23:59:59.000Z

303

Carbon sequestration  

Science Journals Connector (OSTI)

...Leaver and Howard Dalton Carbon sequestration Rattan Lal * * ( lal.1...and biotic technologies. Carbon sequestration implies transfer of atmospheric...and biomass burning. 3. Carbon sequestration Emission rates from fossil...

2008-01-01T23:59:59.000Z

304

Carbon Sequestration  

Science Journals Connector (OSTI)

Carbon sequestration refers to a portfolio of activities for ... capture, separation and storage or reuse of carbon or CO2. Carbon sequestration technologies encompass both the prevention of CO2 emissions into ...

Robert L. Kane MS; Daniel E. Klein MBA

2005-01-01T23:59:59.000Z

305

Carbon Sequestered, Carbon Displaced and the Kyoto Context  

SciTech Connect (OSTI)

The integrated system that embraces forest management, forest products, and land-use change impacts the global carbon cycle - and hence the net emission of the greenhouse gas carbon dioxide - in four fundamental ways. Carbon is stored in living and dead biomass, carbon is stored in wood products and landfills, forest products substitute in the market place for products made from other materials, and forest harvests can be used wholly or partially to displace fossil fuels in the energy sector. Implementation of the Kyoto Protocol to the United Nations Framework Convention on Climate Change would result in the creation of international markets for carbon dioxide emissions credits, but the current Kyoto text does not treat all carbon identically. We have developed a carbon accounting model, GORCAM, to examine a variety of scenarios for land management and the production of forest products. In this paper we explore, for two simple scenarios of forest management, the carbon flows that occur and how these might be accounted for under the Kyoto text. The Kyoto protocol raises questions about what activities can result in emissions credits, which carbon reservoirs will be counted, who will receive the credits, and how much credit will be available? The Kyoto Protocol would sometimes give credits for carbon sequestered, but it would always give credits when fossil-fuel carbon dioxide emissions are displaced.

Marland, G.; Schlamadinger, B.

1999-04-18T23:59:59.000Z

306

Living a Sustainable Future  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Living a Sustainable Future Living a Sustainable Future August 1, 2013 Biomass to fuel project The Laboratory's biomass team is working to solve the energy crisis through...

307

Nuclear and Particle Futures  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Nuclear and Particle Futures Nuclear and Particle Futures The Lab's four Science Pillars harness capabilities for solutions to threats- on national and global scales. Contacts...

308

OSCARS-Future-Tech  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

OSCARS and Future Tech Engineering Services The Network OSCARS How It Works Who's Using OSCARS? OSCARS and Future Tech OSCARS Standard and Open Grid Forum OSCARS Developers...

309

Active stewardship: sustainable future  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

stewardship: sustainable future Active stewardship: sustainable future Energy sustainability is a daunting task: How do we develop top-notch innovations with some of the...

310

California Energy Futures Study Working Committee  

E-Print Network [OSTI]

Organization (ILO) (2008) Green Jobs: Towards decent work in a sustainable, low-carbon world. 376 pp. Urbanchuk of renewable & sustainable feedstocks for fuels (e.g. BCAP), development of new market mechanisms Medium's Energy Future, Biofuels #12;#12;#12;#12;Build-out Rate Final scenario 5.5 bgge ~100 biorefineries

California at Davis, University of

311

Secretary Chu Announces FutureGen | netl.doe.gov  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

& Wilcox, and Air Liquide Process & Construction, Inc. to build FutureGen 2.0, a clean coal repowering program and carbon dioxide (CO2) storage network. The project partners...

312

Vehicle Manufacturing Futures in Transportation Life-cycle Assessment  

E-Print Network [OSTI]

Lead Acid, Ni-Mh, and Li-ion battery manufacturing isMh battery, HEV Page 4 of 10 with a Li-ion battery, PHEV20with a Li-ion battery, PHEV60 with a Li-ion battery, and

Chester, Mikhail; Horvath, Arpad

2011-01-01T23:59:59.000Z

313

Synthesis and fluid interaction of ultra long carbon nanotubes  

E-Print Network [OSTI]

The successful integration for carbon nanotubes in future electronic applications relies on advances in their synthesis. In this work optimization of growth parameters was conducted to obtain ultra long carbon nanotubes. ...

Hofmann, Mario

2009-01-01T23:59:59.000Z

314

Ecological Carbon Sequestration in the Oceans and Climate Change  

Science Journals Connector (OSTI)

The biological carbon pump helps regulate the partitioning of carbon dioxide between the atmosphere and the ocean and is expected to play a fundamental role in future climate change.

Richard Sanders; Stephanie Henson

2014-07-01T23:59:59.000Z

315

Global Energy Futures: With International Futures (IFs)  

SciTech Connect (OSTI)

Dr. Hughes presents and discusses the results of simulations on alternative energy futures composed in collaboration with SNL's Sustainability Innovation Foundry.

Hughes, Barry

2013-03-20T23:59:59.000Z

316

Multiple Rankine topping cycles  

SciTech Connect (OSTI)

The efficiency of a Rankine cycle is primarily determined by the temperatures of heat addition and rejection. However, no working fluid has been identified which will operate in a Rankine cycle over an extremely wide temperature range. Multiple Rankine topping cycles offer a technique for achieving high thermal efficiencies in power plants by allowing the use of several working fluids. This paper gives a history of Rankine topping cycles, presents an analysis for the calculation of the overall efficiency of a three-module multiple Rankine cycle, and presents results from a case study for a sodium-mercury-water cycle.

McWhirter, J.D. [Argonne National Lab., Idaho Falls, ID (United States). Engineering Div.]|[Idaho State Univ., Pocatello, ID (United States). Coll. of Engineering

1995-07-01T23:59:59.000Z

317

DOE Manual Studies Terrestrial Carbon Sequestration | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Manual Studies Terrestrial Carbon Sequestration Manual Studies Terrestrial Carbon Sequestration DOE Manual Studies Terrestrial Carbon Sequestration January 18, 2011 - 12:00pm Addthis Washington, DC - There is considerable opportunity and growing technical sophistication to make terrestrial carbon sequestration both practical and effective, according to the latest carbon capture and storage (CCS) "best practices" manual issued by the U.S. Department of Energy. Best Practices for Terrestrial Sequestration of Carbon Dioxide details the most suitable operational approaches and techniques for terrestrial sequestration, a carbon dioxide (CO2) mitigation strategy capable of removing CO2 already in the air. Consequently, terrestrial sequestration, which uses photosynthesis - part of the natural carbon cycle - to create

318

Review problems on photosynthesis, carbon cycle. Julie Wright, HAS222d/253e 2007 1) Photosynthesis resembles the hydrogen fuel cell we studied in the lab. The following reactions  

E-Print Network [OSTI]

resembles the hydrogen fuel cell we studied in the lab. The following reactions were taken from the review) the overall reaction of photosynthesis is: H2O + CO2 ---> O2 + CH2O E'o = -1.24 Hydrogen fuel cell: 2H2O does hydrogen combustion differ from sugar/alcohol/biofuels combustion ecologically? 2) Why is carbon

319

Snowball Earth prevention by dissolved organic carbon remineralization  

Science Journals Connector (OSTI)

... model of the co-evolution of Neoproterozoic climate and the carbon cycle that provides an alternative interpretation to the hard snowball hypothesis of the origin of the observed ?13C variations ... carbon cycle component of the model. Supplementary Fig. 4 shows equivalent results for the case X = 1. ...

W. Richard Peltier; Yonggang Liu; John W. Crowley

2007-12-06T23:59:59.000Z

320

Carbon Smackdown: Carbon Capture  

SciTech Connect (OSTI)

In this July 9, 2010 Berkeley Lab summer lecture, Lab scientists Jeff Long of the Materials Sciences and Nancy Brown of the Environmental Energy Technologies Division discuss their efforts to fight climate change by capturing carbon from the flue gas of power plants, as well as directly from the air

Jeffrey Long

2010-07-12T23:59:59.000Z

Note: This page contains sample records for the topic "future carbon 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

Success Stories: Carbon Explorer  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

LBNL Device Monitors Ocean Carbon LBNL Device Monitors Ocean Carbon Imagine waking up each morning and discovering that twenty percent of all plants in your garden had disappeared over night. They had been eaten. Equally astonishing would be the discovery in the afternoon that new plants had taken their place. This is the norm of life in the ocean. Without the ability to accurately observe these daily changes in ocean life cycles, over vast spatial scales, we lack the ability to predict how the ocean will respond to rising CO2 levels, crippling our ability to develop accurate models of global warming or devise strategies to prevent it. The Carbon Explorer, conceived by Berkeley Lab's James K. Bishop in collaboration with Scripps Institution of Oceanography (La Jolla, California) and WET labs, Inc. (Philomath, Oregon), bridges this

322

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.

323

The combined cycle  

Science Journals Connector (OSTI)

Any combination of at least two cyclic processes converting thermal energy (heat) to work forms a combined cycle. In principle, the potential number of ... number of options reduces to a variety of cycles consi...

R. U. Pitt

1995-01-01T23:59:59.000Z

324

Water Cycle Pilot Study  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

1 Water Cycle Pilot Study To learn more about Earth's water cycle, the U.S. Department of Energy (DOE) has established a multi-laboratory science team representing five DOE...

325

mathematics single cycle  

E-Print Network [OSTI]

47 mathematics education single cycle master's study programme #12;48 single cycle master's study program in Mathematics Education #12;49 single cycle master's study program in Mathematics Education MATHEMATICS EDUCATION The program is in tune with the principles of the Bologna Declaration. · Academic title

?umer, Slobodan

326

The Life Cycle Analysis Toolbox  

SciTech Connect (OSTI)

The life cycle analysis toolbox is a valuable integration of decision-making tools and supporting materials developed by Oak Ridge National Laboratory (ORNL) to help Department of Energy managers improve environmental quality, reduce costs, and minimize risk. The toolbox provides decision-makers access to a wide variety of proven tools for pollution prevention (P2) and waste minimization (WMin), as well as ORNL expertise to select from this toolbox exactly the right tool to solve any given P2/WMin problem. The central element of the toolbox is a multiple criteria approach to life cycle analysis developed specifically to aid P2/WMin decision-making. ORNL has developed numerous tools that support this life cycle analysis approach. Tools are available to help model P2/WMin processes, estimate human health risks, estimate costs, and represent and manipulate uncertainties. Tools are available to help document P2/WMin decision-making and implement programs. Tools are also available to help track potential future environmental regulations that could impact P2/WMin programs and current regulations that must be followed. An Internet-site will provide broad access to the tools.

Bishop, L.; Tonn, B.E.; Williams, K.A.; Yerace, P.; Yuracko, K.L.

1999-02-28T23:59:59.000Z

327

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.

328

Project Profile: 10-Megawatt Supercritical Carbon Dioxide Turbine  

Broader source: Energy.gov [DOE]

The National Renewable Energy Laboratory (NREL) and its partners, under the 2012 SunShot Concentrating Solar Power (CSP) R&D funding opportunity announcement (FOA), aim to demonstrate a multi-megawatt power cycle using supercritical carbon dioxide (s-CO2) as the working fluid. The use of carbon dioxide instead of steam allows higher power-cycle efficiency and cycle components that are more compact.

329

Fuel Cycle Research & Development | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Fuel Cycle Research & Fuel Cycle Research & Development Fuel Cycle Research & Development Fuel Cycle Research & Development The mission of the Fuel Cycle Research and Development (FCRD) program is to conduct research and development to help develop sustainable fuel cycles, as described in the Nuclear Energy Research and Development Roadmap. Sustainable fuel cycle options are those that improve uranium resource utilization, maximize energy generation, minimize waste generation, improve safety, and limit proliferation risk. The FCRD program will develop a suite of options to enable future policymakers to make informed decisions about how best to manage used fuel from nuclear reactors. The overall goal is to demonstrate the technologies necessary to allow commercial deployment of solutions for the sustainable management of used

330

Stimulating carbon efficient supply chains : carbon labels and voluntary public private partnerships  

E-Print Network [OSTI]

This thesis looks at the potential of labeling products with life cycle greenhouse gas emission information as a bottom-up, complementary alternative to carbon cap and trade systems. By improving the transparency of product ...

Tan, Kwan Chong

2009-01-01T23:59:59.000Z

331

Future Climate Engineering Solutions  

E-Print Network [OSTI]

Engineering Associations from around the world are part of the project `Future Climate - Engineering Solu- tions'. Within the project the participating associations have been developing national climate plansFuture Climate Engineering Solutions Joint report 13 engineering participating engeneering

332

Earth'future climate  

Science Journals Connector (OSTI)

...their visions of the future I. Astronomy and Earth sciences compiled by J. M. T. Thompson Earth'future climate Mark A. Saunders 1 1 Benfield...provide informed scientific projections for Earth's climate into the next millennium. This...

1999-01-01T23:59:59.000Z

333

Renewable Electricity Futures (Presentation)  

SciTech Connect (OSTI)

This presentation library summarizes findings of NREL's Renewable Electricity Futures study, published in June 2012. RE Futures investigated the challenges and impacts of achieving very high renewable electricity generation levels in the contiguous United States by 2050.

Mai, T.

2012-10-01T23:59:59.000Z

334

Renewable Electricity Futures (Presentation)  

SciTech Connect (OSTI)

This presentation summarizes findings of NREL's Renewable Electricity Futures study, published in June 2012. RE Futures investigated the challenges and impacts of achieving very high renewable electricity generation levels in the contiguous United States by 2050.

Mai, T.

2012-11-01T23:59:59.000Z

335

Renewable Electricity Futures (Presentation)  

SciTech Connect (OSTI)

This presentation summarizes findings of NREL's Renewable Electricity Futures study, published in June 2012. RE Futures investigated the challenges and impacts of achieving very high renewable electricity generation levels in the contiguous United States by 2050.

Mai, T.

2013-04-01T23:59:59.000Z

336

Renewable Electricity Futures (Presentation)  

SciTech Connect (OSTI)

This presentation summarizes findings of NREL's Renewable Electricity Futures study, published in June 2012. RE Futures investigated the challenges and impacts of achieving very high renewable electricity generation levels in the contiguous United States by 2050.

Hand, M. M.

2012-09-01T23:59:59.000Z

337

Strike variability of carbonate platform margin stratal architecture and cycle stacking patterns: Outcrop and seismic examples from lower Permian depositional sequences of the Permian Basin, U.S.A.  

SciTech Connect (OSTI)

Strike variability in stratal architecture, cycle stacking patterns and facies differentiation within sequences exemplifies the potential for differential stratigraphic response of platforms to eustasy. Variability exists within base-level cycles of several scales within a compound stratigraphic hierarchy, though the causes may vary among different scales. Cross-sections from outcrops in the Sierra Diablo document the framework and stacking pattern of 3rd-order sequences (HFS), including: two progradational middle Wolfcampian HFS (mW1-2), one backstepped upper Wolfcampian HFS (uW1), one progradational lower Leonardin HFS (L1), aggradational middle (L2) and upper Leonardian HFS (L3), three progradatic upper Leonardian HFS (L4-6), and two backstepped, aggradational upper Leonardian HFS (L7-8). Seismic lines from the northern Delaware and Midland Basins and San Simon Channel area document the regional consistency of 3rd-order sequence stacking patterns (a response to eustasy), but show variability related to local subsidence, antecedent topography (owing to deeper structures and platform margin erosion), windward vs. leeward facing, and siliciclastic sediment supply. Sequences L2 and L3 appear to exhibit the greatest variability in stacking pattern. Strike variability in 4th/5th-order cycle stacking patterns within 3rd-order sequences as studied in outcrop is greatest in sequences L2 and L3, in which headland-bight margin trends are developed on a lateral scale of 1-2 miles. Aggrational to backstepping reef-margin facies with steep ({le}35{degrees}) foreslopes developed along headlands. Mudstones abut these margin facies abruptly along headlands and may contain megabreccias at the toe-of-slope. More gently sloping (10-15{degrees}) {open_quotes}ramp{close_quotes} margin strata composed of fusulinid packstones characterize bights.

Fitchen, W.M. [Univ. of Texas, Austin, TX (United States)

1996-12-31T23:59:59.000Z

338

Combating Future Threats  

Science Journals Connector (OSTI)

......research-article Future Combating Future Threats Andy Clark On 21 September BCS, The Chartered...leadership debate about future security threats. Andy Clark, Head of Forensics at Detica...and where are they? These are different threats. Smartphones are powerful, connected......

Andy Clark

2011-01-01T23:59:59.000Z

339

CHARTING BC'S ECONOMIC FUTURE  

E-Print Network [OSTI]

CHARTING BC'S ECONOMIC FUTURE discussionguide 100communityconversations #12;1 Thank you for agreeing to participate in this Community Conversation about BC's economic future. Each year Simon Fraser is "Charting BC's Economic Future". Faced with an increasingly competitive global economy, it is more important

Kavanagh, Karen L.

340

Renewable Electricity Futures Study  

E-Print Network [OSTI]

Renewable Electricity Futures Study End-use Electricity Demand Volume 3 of 4 Volume 2 PDF Volume 3;Renewable Electricity Futures Study Edited By Hand, M.M. National Renewable Energy Laboratory Baldwin, S. U Sandor, D. National Renewable Energy Laboratory Suggested Citations Renewable Electricity Futures Study

Note: This page contains sample records for the topic "future carbon 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

Indirect-fired gas turbine dual fuel cell power cycle  

DOE Patents [OSTI]

A fuel cell and gas turbine combined cycle system which includes dual fuel cell cycles combined with a gas turbine cycle wherein a solid oxide fuel cell cycle operated at a pressure of between 6 to 15 atms tops the turbine cycle and is used to produce CO.sub.2 for a molten carbonate fuel cell cycle which bottoms the turbine and is operated at essentially atmospheric pressure. A high pressure combustor is used to combust the excess fuel from the topping fuel cell cycle to further heat the pressurized gas driving the turbine. A low pressure combustor is used to combust the excess fuel from the bottoming fuel cell to reheat the gas stream passing out of the turbine which is used to preheat the pressurized air stream entering the topping fuel cell before passing into the bottoming fuel cell cathode. The CO.sub.2 generated in the solid oxide fuel cell cycle cascades through the system to the molten carbonate fuel cell cycle cathode.

Micheli, Paul L. (Sacramento, CA); Williams, Mark C. (Morgantown, WV); Sudhoff, Frederick A. (Morgantown, WV)

1996-01-01T23:59:59.000Z

342

Carbon Conference  

Science Journals Connector (OSTI)

Carbon Conference ... The Fourth Hienninl Conference on Carbon will be held at the University of Buffalo, June 15 to 19. ... The Pittsburgh Section's coal technology group will meet in the conference room at Mellon Institute, Pittsburgh, June ... ...

1959-06-01T23:59:59.000Z

343

Fuel cycles and envisioned roles of fast neutron reactors and hybrids  

SciTech Connect (OSTI)

Future innovative nuclear fuel cycles will require insuring sustainability in terms of safe operation, optimal use of resources, radioactive waste minimization and reduced risk of proliferation. The present paper introduces some basic notions and fundamental fuel cycle strategies. The simulation approach needed to evaluate the impact of the different fuel cycle alternatives will also be shortly discussed.

Salvatores, Massimo [CEA-Cadarache, DEN-Dir, Bat. 101, St-Paul-Lez-Durance 13108 (France)

2012-06-19T23:59:59.000Z

344

Renewables in India : Status and Future Potential  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Renewables in India : Status and Future Potential Renewables in India : Status and Future Potential Speaker(s): Luis Fernandes Date: July 9, 2007 - 12:00pm Location: 90-3122 Seminar Host/Point of Contact: Galen Barbose We analyse the status and the trends in the growth of renewables in India. We propose a methodology linking micro-simulation to macro-modelling to obtain technical and economic potential estimates for solar water heaters in residential and commercial and biomass gasifiers for thermal applications in industry. We assess the sustainability of renewables based on the criteria of life cycle cost, net energy ratio, resource constraint and greenhouse gas emissions. The renewable based technologies seem to be sustainable based on all criteria, except the high life cycle cost. In some cases e.g. in wind and biomass based systems land availability may

345

An overview of current and future sustainable gas turbine technologies  

Science Journals Connector (OSTI)

In this work an overview of current and future sustainable gas turbine technologies is presented. In particular, the various gas turbine technologies are described and compared. Emphasis has been given to the various advance cycles involving heat recovery from the gas turbine exhaust, such as, the gas to gas recuperation cycle, the combined cycle, the chemical recuperation cycle, the Cheng cycle, the humid air turbine cycle, etc. The thermodynamic characteristics of the various cycles are considered in order to establish their relative importance to future power generation markets. The combined cycle technology is now well established and offers superior to any of the competing gas turbine based systems, which are likely to be available in the medium term for large-scale power generation applications. In small-scale generation, less than 50MWe, it is more cost effective to install a less complex power plant, due to the adverse effect of the economics of scale. Combined cycle plants in this power output range normally have higher specific investment costs and lower electrical efficiencies but also offer robust and reliable performance. Mixed air steam turbines (MAST) technologies are among the possible ways to improve the performance of gas turbine based power plants at feasible costs (e.g. peak load gas turbine plants).

Andreas Poullikkas

2005-01-01T23:59:59.000Z

346

Advanced Fuel Cycles Activities in IAEA  

SciTech Connect (OSTI)

Considerable scientific and technical progress in many areas of Partitioning and Transmutation (P and T) has been recognized as probable answers to ever-growing issues threatening sustainability, environmental protection and non-proliferation. These recent global developments such as Russian initiative on Global Nuclear Infrastructure-International Fuel Centre and the US initiative on Global Nuclear Energy Partnership (GNEP) have made advanced fuel cycles as one of the decisive influencing factor for the future growth of nuclear energy. International Atomic Energy Agency has initiated the International Project on Innovative Nuclear Reactors and Fuel Cycles (INPRO) with overall objective of bringing together technology holders and technology users to consider jointly the international and national actions required achieving desired innovations in nuclear reactors and fuel cycles. One of the interesting common features of these initiatives (INPRO, GNEP and GNI-IFC) is closed fast reactor fuel cycles and proliferation resistance. Any fuel cycle that integrate P and T into it is also known as 'Advanced Fuel Cycle' (AFC) that could achieve reduction of plutonium and Minor Actinide (MA) elements (namely Am, Np, Cm, etc.). In this regard, some Member States are also evaluating alternative concepts involving the use of thorium fuel cycle, inert-matrix fuel or coated particle fuel. Development of 'fast reactors with closed fuel cycles' would be the most essential step for implementation of P and T. The scale of realization of any AFC depends on the maturity of the development of all these elemental technologies such as recycling MA, Pu as well as reprocessed uranium. In accordance with the objectives of the Agency, the programme B entitled 'Nuclear Fuel cycle technologies and materials' initiated several activities aiming to strengthen the capabilities of interested Member States for policy making, strategic planning, technology development and implementation of safe, reliable, economically efficient, proliferation resistant, environmentally sound and secure nuclear fuel cycle programmes. The paper describes some on-going IAEA activities in the area of: MA-fuel and target, thorium fuel cycle, coated particle fuel, MA-property database, inert matrix fuels, liquid metal cooled fast reactor fuels and fuel cycles, management of reprocessed uranium and proliferation resistance in fuel cycle. (authors)

Nawada, H.P.; Ganguly, C. [Nuclear Fuel Cycle and Materials Section, Division of Nuclear Fuel Cycle and Waste Technology, Department of Nuclear Energy, International Atomic Energy Agency, Vienna (Austria)

2007-07-01T23:59:59.000Z

347

Carbon Dioxide Capture from Coal-Fired  

E-Print Network [OSTI]

Carbon Dioxide Capture from Coal-Fired Power Plants: A Real Options Analysis May 2005 MIT LFEE 2005 are valued using the "real options" valuation methodology in an uncertain carbon dioxide (CO2) price (baseline IGCC), and IGCC with pre-investments that make future retrofit for CO2 capture less expensive (pre

348

Carbon Management Plan 1. Executive summary 5  

E-Print Network [OSTI]

of energy intensive buildings have been constructed, whilst at the same time disposals have concentrated. Background and context 16 4. Carbon management strategy 18 5. Carbon emissions baseline and projections 22 6 Plan interventions 55 Appendix B: Possible future actions 76 #12;4 #12;5 1. EXECUTIVE SUMMARY Foreword

Haase, Markus

349

Carbon Isotopes  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Atmospheric Trace Gases » Carbon Isotopes Atmospheric Trace Gases » Carbon Isotopes Carbon Isotopes Gateway Pages to Isotopes Data Modern Records of Carbon and Oxygen Isotopes in Atmospheric Carbon Dioxide and Carbon-13 in Methane 800,000 Deuterium Record and Shorter Records of Various Isotopic Species from Ice Cores Carbon-13 13C in CO Measurements from Niwot Ridge, Colorado and Montana de Oro, California (Tyler) 13C in CO2 NOAA/CMDL Flask Network (White and Vaughn) CSIRO GASLAB Flask Network (Allison, Francey, and Krummel) CSIRO in situ measurements at Cape Grim, Tasmania (Francey and Allison) Scripps Institution of Oceanography (Keeling et al.) 13C in CH4 NOAA/CMDL Flask Network (Miller and White) Northern & Southern Hemisphere Sites (Quay and Stutsman) Northern & Southern Hemisphere Sites (Stevens)

350

CURRENT AND FUTURE IGCC TECHNOLOGIES:  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

16, 2008 16, 2008 DOE/NETL-2008/1337 A Pathway Study Focused on Non-Carbon Capture Advanced Power Systems R&D Using Bituminous Coal - Volume 1 Current and Future IGCC Technologies 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

351

FutureGen_factsheet.cdr  

Broader source: Energy.gov (indexed) [DOE]

Vision Vision for Tomorrow's Clean Energy FutureGen - A Sequestration and Hydrogen Research Initiative Responding to the President's Initiatives The Technology The Integrated Sequestration and Hydrogen Research Initiative is a $1 billion government/ industry partnership to design, build and operate a nearly emission-free, coal-fired electric and hydrogen production plant. The 275-megawatt prototype plant will serve as a large scale engineering laboratory for testing new clean power, carbon capture, and coal-to-hydrogen technologies. It will be the cleanest fossil fuel-fired power plant in the world. The project is a direct response to the President's Climate Change and Hydrogen Fuels Initiatives. President Bush emphasized the importance of technology in stabilizing greenhouse gas concentrations in the atmosphere with two major policy announcements: the National Climate

352

Chapter 24 - Nuclear energy future  

Science Journals Connector (OSTI)

Abstract This chapter attempts to concisely describe the role that nuclear power may take in the meeting the worlds future energy needs. Historically, economic considerations have triumphed all other considerations when selecting an energy source. Nuclear power growth stagnated in the late twentieth century for a variety of reasons. A revival in nuclear reactor construction is beginning in the United States and elsewhere at the start of the twenty-first century. World energyand especially electricityuse is increasing and sustainable approaches to meeting this need are sought. With rising concern about climate change, nuclear power is found to be the lowest contributor to carbon dioxide emissions, even compared to solar and wind power. Besides electricity generation, power reactors can be utilized for large-scale desalination and hydrogen generation.

Raymond L. Murray; Keith E. Holbert

2015-01-01T23:59:59.000Z

353

Life cycle assessment of various hydrogen production methods  

Science Journals Connector (OSTI)

A comprehensive life cycle assessment (LCA) is reported for five methods of hydrogen production, namely steam reforming of natural gas, coal gasification, water electrolysis via wind and solar electrolysis, and thermochemical water splitting with a CuCl cycle. Carbon dioxide equivalent emissions and energy equivalents of each method are quantified and compared. A case study is presented for a hydrogen fueling station in Toronto, Canada, and nearby hydrogen resources close to the fueling station. In terms of carbon dioxide equivalent emissions, thermochemical water splitting with the CuCl cycle is found to be advantageous over the other methods, followed by wind and solar electrolysis. In terms of hydrogen production capacities, natural gas steam reforming, coal gasification and thermochemical water splitting with the CuCl cycle methods are found to be advantageous over the renewable energy methods.

E. Cetinkaya; I. Dincer; G.F. Naterer

2012-01-01T23:59:59.000Z

354

A Low-Carbon Fuel Standard for California, Part 1: Technical Analysis  

E-Print Network [OSTI]

ITSRR0707 A Low-Carbon Fuel Standard for California PartEnergy Commission. A Low Carbon Fuel Standard For CaliforniaPont, et al. (2007). Full Fuel Cycle Assessment Well To Tank

Farrell, Alexander; Sperling, Daniel

2007-01-01T23:59:59.000Z

355

Theoretical and experimental analysis of supercritical carbon dioxide cooling / Paul Marius Harris.  

E-Print Network [OSTI]

??With on-going developments in the field of trans-critical carbon dioxide (R-744) vapour compression cycles, a need to effectively describe the heat transfer of supercritical carbon (more)

Harris, Paul Marius

2014-01-01T23:59:59.000Z

356

Challenges for improving estimates of soil organic carbon stored in  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Challenges for improving estimates of soil organic carbon stored in Challenges for improving estimates of soil organic carbon stored in permafrost regions September 30, 2013 Tweet EmailPrint One of the greatest environmental challenges of the 21st century lies in predicting the impacts of anthropogenic activities on Earth's carbon cycle. Soil is a significant component of the carbon cycle, because it contains at least two-thirds of the world's terrestrial carbon and more than twice as much carbon as the atmosphere. Although soil organic carbon (SOC) stocks were built over millennial time scales, they are susceptible to a far more rapid release back to the atmosphere due to climatic and land use change. If environmental perturbations negatively impact the processes regulating the storage of SOC, significant amounts of this carbon could be decomposed

357

E-Print Network 3.0 - aves carbon isotopes Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

J-L. 2006. A new scenario Summary: , Bowling DR, Ehleringer JR. 2003. Seasonal cycle of carbon dioxide and its isotopic composition in an urban... history. ??? Meetings...

358

Causes and implications of persistent atmospheric carbon dioxide biases in Earth System Models  

E-Print Network [OSTI]

Intercomparison Project indicated that climate models oftenpled ClimateCarbon Cycle Model Intercomparison Project (C 4BIOFEEDBACK project of the Center for Climate Dynamics (SKD)

2014-01-01T23:59:59.000Z

359

FutureGen Project Launched | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

FutureGen Project Launched FutureGen Project Launched FutureGen Project Launched December 6, 2005 - 4:29pm Addthis Government, Industry Agree to Build Zero-Emissions Power Plant of the Future WASHINGTON, DC -- Secretary of Energy Samuel W. Bodman today announced that the Department of Energy has signed an agreement with the FutureGen Industrial Alliance to build FutureGen, a prototype of the fossil-fueled power plant of the future. The nearly $1 billion government-industry project will produce electricity and hydrogen with zero-emissions, including carbon dioxide, a greenhouse gas. The initiative is a response to President Bush's directive to develop a hydrogen economy by drawing upon the best scientific research to address the issue of global climate change. Today's announcement marks the official

360

Carbon Dioxide Information Analysis Center (CDIAC)  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Latest Estimates Latest Estimates Atmos CO2 Level 397.31 ppm Fossil CO2 Emissions 9,167 MMT Carbon Global Temp Anomaly +0.56°C / +1.01°F Global Sea Level Rise +2.9 ± 0.4 mm/y Carbon Dioxide Information Analysis Center The Carbon Dioxide Information Analysis Center (CDIAC) is the primary climate-change data and information analysis center of the U.S. Department of Energy (DOE). CDIAC is located at DOE's Oak Ridge National Laboratory (ORNL) and includes the World Data Center for Atmospheric Trace Gases. CDIAC's data holdings include estimates of carbon dioxide emissions from fossil-fuel consumption and land-use changes; records of atmospheric concentrations of carbon dioxide and other radiatively active trace gases; carbon cycle and terrestrial carbon management datasets and analyses; and

Note: This page contains sample records for the topic "future carbon 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

Power Plant Cycling Costs  

SciTech Connect (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

362

Life Cycle Cost Estimate  

Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

Life-cycle costs (LCCs) are all the anticipated costs associated with a project or program alternative throughout its life. This includes costs from pre-operations through operations or to the end of the alternative.This chapter discusses life cycle costs and the role they play in planning.

1997-03-28T23:59:59.000Z

363

Moving Towards a More Sustainable and Secure Energy Future  

E-Print Network [OSTI]

-emitting replacement ? Natural gas ? Clean coal with carbon capture ? Renewables 6 Rio Nogales: 800 MW Combined Cycle Natural Gas Plant - Acquired by CPS Energy in April 2012 - Located in Seguin, TX off of IH10 - Primary replacement... office in SA ? $600k education investment ? LEDs (light-emitting diodes) ? HQ and Mfrg in SA ? Plan for 25,000 LED street lights in SA major thorough fares ? $10/light produced in SA for education ? Clean coal w carbon capture ? R&D council...

Stoker, K.

2012-01-01T23:59:59.000Z

364

Preserving Russia's carbon sink: strategies for improving carbon storage through boreal forest protection  

Science Journals Connector (OSTI)

The boreal forests of Siberia, which store 40000 million tons of carbon and account for 25% of all non-ocean carbon absorption in the northern hemisphere, play a critical role in maintaining global climate balance. Siberia's forests, however, are being destroyed and degraded at an ever-increasing rate. This paper discusses the impact of Siberia's forests on the global carbon cycle, and what political and economic steps can be taken to ensure their preservation.

Olivia Rugo; Adam Weiss

1996-01-01T23:59:59.000Z

365

Definition, Capabilities, and Components of a Terrestrial Carbon Monitoring System  

SciTech Connect (OSTI)

Research efforts for effectively and consistently monitoring terrestrial carbon are increasing in number. As such, there is a need to define carbon monitoring and how it relates to carbon cycle science and carbon management. There is also a need to identify intended capabilities of a carbon monitoring system and what system components are needed to develop the capabilities. This paper is intended to promote discussion on what capabilities are needed in a carbon monitoring system based on requirements for different areas of carbon-related research and, ultimately, for carbon management. While many methods exist to quantify different components of the carbon cycle, research is needed on how these methods can be coupled or integrated to obtain carbon stock and flux estimates regularly and at a resolution that enables attribution of carbon dynamics to respective sources. As society faces sustainability and climate change conerns, carbon management activities implemented to reduce carbon emissions or increase carbon stocks will become increasingly important. Carbon management requires moderate to high resolution monitoring. Therefore, if monitoring is intended to help inform management decisions, management priorities should be considered prior to development of a monitoring system.

West, Tristram O.; Brown, Molly E.; Duran, Riley M.; Ogle, Stephen; Moss, Richard H.

2013-08-08T23:59:59.000Z

366

Future of Telecommunications  

Science Journals Connector (OSTI)

... . G. Radley, of the Post Office Research Station at Dollis Hill, spoke on Telecommunications of the future. He pointed out that in 1914, although wire telephony had been ...

1941-11-15T23:59:59.000Z

367

Materials for the Future  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

for the Future The Lab's four Science Pillars harness capabilities for solutions to threats- on national and global scales. Contacts Pillar Champion Mary Hockaday Email Pillar...

368

My Amazing Future 2012  

ScienceCinema (OSTI)

Idaho National Laboratory's My Amazing Future program gives 8th grade women the opportunity to experience careers in science and engineering.

None

2013-05-28T23:59:59.000Z

369

The Future Metropolitan Landscape  

E-Print Network [OSTI]

care for the design of this landscape, for its water, air,The Future Metropolitan Landscape Peter Bosselmann and Denirather to an urbanized landscape with multiple centers,

Bosselmann, Peter; Ruggeri, Deni

2007-01-01T23:59:59.000Z

370

Soil organic carbon sequestration potential of cropland in China Zhangcai Qin,1,2  

E-Print Network [OSTI]

Soil organic carbon sequestration potential of cropland in China Zhangcai Qin,1,2 Yao Huang,1), Soil organic carbon sequestration potential of cropland in China, Global Biogeochem. Cycles, 27, doi:10 carbon (SOC) in cropland is of great importance to the global carbon (C) balance and to agricultural

Pittendrigh, Barry

371

Glaciation, aridification, and carbon sequestration in the Permo-Carboniferous: The isotopic record from low latitudes  

E-Print Network [OSTI]

Glaciation, aridification, and carbon sequestration in the Permo-Carboniferous: The isotopic record and carbon sequestration in the Late Paleozoic, we have compiled new and published oxygen and carbon isotopic Carboniferous Stable isotopes Carbon cycling Brachiopods To evaluate the isotopic record of climate change

Grossman, Ethan L.

372

First National Conference on Carbon Sequestration Washington, DC, May 14-17, 2001  

E-Print Network [OSTI]

First National Conference on Carbon Sequestration Washington, DC, May 14-17, 2001 Caldeira, K for Research on Ocean Carbon Sequestration (DOCS) *Climate and Carbon Cycle Modeling Group, Lawrence Livermore carbon sequestration strategy. Therefore, we want to understand the effectiveness of oceanic injection

373

Non-carbon induction furnace  

DOE Patents [OSTI]

The present invention is directed to an induction furnace for melting and casting highly pure metals and alloys such as uranium and uranium alloys in such a manner as to minimize contamination of the melt by carbon derived from the materials and the environment within the furnace. The subject furnace is constructed of non-carbon materials and is housed within a conventional vacuum chamber. The furnace comprises a ceramic oxide crucible for holding the charge of metal or alloys. The heating of the crucible is achieved by a plasma-sprayed tungsten susceptor surrounding the crucible which, in turn, is heated by an rf induction coil separated from the susceptor by a cylinder of inorganic insulation. The furnace of the present invention is capable of being rapidly cycled from ambient temperatures to about 1650/sup 0/C for effectively melting uranium and uranium alloys without the attendant carbon contamination problems previously encountered when using carbon-bearing furnace materials.

Holcombe, C.E.; Masters, D.R.; Pfeiler, W.A.

1984-01-06T23:59:59.000Z

374

Carbon Capture by Fossil Fuel Power Plants: An Economic Analysis  

E-Print Network [OSTI]

Carbon Capture by Fossil Fuel Power Plants: An Economic Analysis ¨Ozge I¸slegen Graduate School excellent research assistance. #12;Carbon Capture by Fossil Fuel Power Plants: An Economic Analysis Abstract: For fossil fuel power plants to be built in the future, carbon capture and storage (CCS) technologies offer

Silver, Whendee

375

Historical forest baselines reveal potential for continued carbon sequestration  

E-Print Network [OSTI]

Historical forest baselines reveal potential for continued carbon sequestration Jeanine M-based studies suggest that land-use history is a more important driver of carbon sequestration in these systems agricultural lands are being promoted as important avenues for future carbon sequestration (8). But the degree

Mladenoff, David

376

Ecosystem element cycling Introduction  

E-Print Network [OSTI]

be responsible for well over 50% of the "wet mass" of organisms. The "dry mass" of living organisms, which is composed of other molecules, is often referred to as biomass. There are four basic types of molecules carbon atoms, and energy is released as carbohydrates and fats are transformed to carbon dioxide

Ickert-Bond, Steffi

377

Carbon Nanotubes.  

E-Print Network [OSTI]

?? Carbon nanotubes have extraordinary mechanical, electrical, thermal andoptical properties. They are harder than diamond yet exible, have betterelectrical conductor than copper, but can also (more)

Fredriksson, Tore

2014-01-01T23:59:59.000Z

378

Carbon sequestration research and development  

SciTech Connect (OSTI)

Predictions of global energy use in the next century suggest a continued increase in carbon emissions and rising concentrations of carbon dioxide (CO{sub 2}) in the atmosphere unless major changes are made in the way we produce and use energy--in particular, how we manage carbon. For example, the Intergovernmental Panel on Climate Change (IPCC) predicts in its 1995 ''business as usual'' energy scenario that future global emissions of CO{sub 2} to the atmosphere will increase from 7.4 billion tonnes of carbon (GtC) per year in 1997 to approximately 26 GtC/year by 2100. IPCC also projects a doubling of atmospheric CO{sub 2} concentration by the middle of next century and growing rates of increase beyond. Although the effects of increased CO{sub 2} levels on global climate are uncertain, many scientists agree that a doubling of atmospheric CO{sub 2} concentrations could have a variety of serious environmental consequences. The goal of this report is to identify key areas for research and development (R&D) that could lead to an understanding of the potential for future use of carbon sequestration as a major tool for managing carbon emissions. Under the leadership of DOE, researchers from universities, industry, other government agencies, and DOE national laboratories were brought together to develop the technical basis for conceiving a science and technology road map. That effort has resulted in this report, which develops much of the information needed for the road map.

Reichle, Dave; Houghton, John; Kane, Bob; Ekmann, Jim; and others

1999-12-31T23:59:59.000Z

379

Thermal Stability of Cyclopentane as an Organic Rankine Cycle Working Fluid  

Science Journals Connector (OSTI)

Thermal Stability of Cyclopentane as an Organic Rankine Cycle Working Fluid ... Because of the rather low molecular weight of water, the use of steam Rankine cycles for waste heat temperatures below 400 C is inefficient and requires the use of expensive multistage expanders. ... Cyclopentane (C5H10) is a cyclic alkane that exhibits a puckered (i.e., one carbon atom tends to jut out above the others to relieve ring stress) ring system of carbonhydrogen (CH) bonds and carboncarbon (CC) single bonds. ...

Daniel M. Ginosar; Lucia M. Petkovic; Donna Post Guillen

2011-08-02T23:59:59.000Z

380

The Hanford Story: Future  

Broader source: Energy.gov [DOE]

The Future Chapter of the Hanford Story illustrates the potential and possibilities offered by a post-cleanup Hanford. From land use plans and preservation at Hanford to economic development and tourism opportunities, the Future chapter touches on a variety of local economic, cultural and environmental perspectives.

Note: This page contains sample records for the topic "future carbon 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

FUTURE LOGISTICS LIVING LABORATORY  

E-Print Network [OSTI]

FUTURE LOGISTICS LIVING LABORATORY Delivering Innovation The Future Logistics Living Lab is a collaboration between NICTA, SAP and Fraunhofer. Australia's first Living Lab provides a platform for industry and research to work together, to investigate real-world problems and to demonstrate innovative technology

Heiser, Gernot

382

Renewable Electricity Futures (Presentation)  

SciTech Connect (OSTI)

This presentation library summarizes findings of NREL's Renewable Electricity Futures study, published in June 2012. RE Futures investigated the challenges and impacts of achieving very high renewable electricity generation levels in the contiguous United States by 2050. It is being presented at the Utility Variable-Generation Integration Group Fall Technical Workshop on October 24, 2012.

Hand, M.

2012-10-01T23:59:59.000Z

383

Renewable Electricity Futures (Presentation)  

SciTech Connect (OSTI)

This presentation summarizes findings of NREL's Renewable Electricity Futures study, published in June 2012. RE Futures investigated the challenges and impacts of achieving very high renewable electricity generation levels in the contiguous United States by 2050. It was presented in a Power Systems Engineering Research Center webinar on September 4, 2012.

Mai, T.

2012-08-01T23:59:59.000Z

384

Renewable Electricity Futures (Presentation)  

SciTech Connect (OSTI)

This presentation library summarizes findings of NREL's Renewable Electricity Futures study, published in June 2012. RE Futures investigated the challenges and impacts of achieving very high renewable electricity generation levels in the contiguous United States by 2050. It was presented in an Union of Concerned Scientists webinar on June 12, 2012.

Hand, M.; Mai, T.

2012-08-01T23:59:59.000Z

385

Renewable Electricity Futures (Presentation)  

SciTech Connect (OSTI)

This presentation library summarizes findings of NREL's Renewable Electricity Futures study, published in June 2012. RE Futures investigated the challenges and impacts of achieving very high renewable electricity generation levels in the contiguous United States by 2050. It was presented in a webinar given by the California Energy Commission.

Hand, M. M.

2012-08-01T23:59:59.000Z

386

Renewable Electricity Futures (Presentation)  

SciTech Connect (OSTI)

This presentation summarizes findings of NREL's Renewable Electricity Futures study, published in June 2012. RE Futures investigated the challenges and impacts of achieving very high renewable electricity generation levels in the contiguous United States by 2050. This presentation was presented in a Wind Powering America webinar on August 15, 2012 and is now available through the Wind Powering America website.

Mai, T.

2012-08-01T23:59:59.000Z

387

Capturing carbon | EMSL  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Capturing carbon Capturing carbon New technology enables molecular-level insight into carbon sequestration Carbon sequestration is a potential solution for reducing greenhouse...

388

An Alternative Mechanism for Accelerated Carbon Sequestration in Concrete  

SciTech Connect (OSTI)

The increased rate of carbon dioxide sequestration (carbonation) is desired in many primary and secondary life applications of concrete in order to make the life cycle of concrete structures more carbon neutral. Most carbonation rate studies have focused on concrete exposed to air under various conditions. An alternative mechanism for accelerated carbon sequestration in concrete was investigated in this research based on the pH change of waters in contact with pervious concrete which have been submerged in carbonate laden waters. The results indicate that the concrete exposed to high levels of carbonate species in water may carbonate faster than when exposed to ambient air, and that the rate is higher with higher concentrations. Validation of increased carbon dioxide sequestration was also performed via thermogravimetric analysis (TGA). It is theorized that the proposed alternative mechanism reduces a limiting rate effect of carbon dioxide dissolution in water in the micro pores of the concrete.

Haselbach, Liv M.; Thomle, Jonathan N.

2014-07-01T23:59:59.000Z

389

Fermilab | Plan for the Future | Fermilab's Future  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Fermilab's Future Fermilab's Future 2013-2015 Next Fermilab's research program for 2015 and beyond New facilities at Fermilab, the nation's dedicated particle physics laboratory, would provide thousands of scientists from across the United States and around the world with world-class scientific opportunities. In collaboration with the Department of Energy and the particle physics community, Fermilab is pursuing a strategic plan that addresses fundamental questions about the physical laws that govern matter, energy, space and time. Fermilab is advancing plans for the best facilities in the world for the exploration of neutrinos and rare subatomic processes, far beyond current global capabilities. The proposed construction of a two-megawatt high-intensity proton accelerator, Project X, would enable a comprehensive

390

Method for processing LNG for rankine cycle  

SciTech Connect (OSTI)

A method is disclosed for processing lng using a mixed heat medium for performing a rankine cycle to gasify the lng. The medium is prepared by batch distillation using only lng. The method comprises the steps of condensing an upflow vapor in a single distillation column employing part of the lng in an lng batch distillation cycle, venting one fraction having low boiling point components mainly containing methane, and accumulating the other fractions containing ethane and components heavier than ethane. The supply of lng to be distilled in the column is halted. A total condensing operation is performed in which the other fractions are sequentially condensed by part of the lng at the condenser to sequentially recover and mix each component with the other fractions. Lng is added as the methane component to the recovered mixture of components to prepare a mixed heat medium consisting of components selected from hydrocarbons having 1-6 carbon atoms, or hydrocarbons having 1-6 carbon atoms and nitrogen. The mixed heat medium is stored. A mixed heat medium vapor generated by heat input to the stored mixed heat medium is condensed by lng and returned to the mixed heat medium; collection and complete gasification of the low boiling point components mainly containing methane and the lng is gasified by condensation to provide an lng vapor gas. Lng is gasified by performing the rankine cycle with the mixed heat medium.

Aoki, I.; Matsumoto, O.

1983-06-14T23:59:59.000Z

391

IFR fuel cycle  

SciTech Connect (OSTI)

The next major milestone of the IFR program is engineering-scale demonstration of the pyroprocess fuel cycle. The EBR-II Fuel Cycle Facility has just entered a startup phase, which includes completion of facility modifications and installation and cold checkout of process equipment. This paper reviews the development of the electrorefining pyroprocess, the design and construction of the facility for the hot demonstration, the design and fabrication of the equipment, and the schedule and initial plan for its operation.

Battles, J.E.; Miller, W.E. [Argonne National Lab., IL (United States); Lineberry, M.J.; Phipps, R.D. [Argonne National Lab., Idaho Falls, ID (United States)

1992-04-01T23:59:59.000Z

392

Multifunctional Structural Supercapacitor Composites Based on Carbon Aerogel Modified High Performance Carbon Fiber Fabric  

Science Journals Connector (OSTI)

Multifunctional Structural Supercapacitor Composites Based on Carbon Aerogel Modified High Performance Carbon Fiber Fabric ... In particular, radical new approaches to energy storage are required to progress toward future zero emission electrical vehicles. ... vehicle attributes and, in particular, the various levels of hybrids. ...

Hui Qian; Anthony R. Kucernak; Emile S. Greenhalgh; Alexander Bismarck; Milo S. P. Shaffer

2013-05-13T23:59:59.000Z

393

Malone cycle refrigerator development  

SciTech Connect (OSTI)

This paper describes the progress made in demonstrating a Malone Cycle Refrigerator/Freezer. The Malone cycle is similar to the Stirling cycle but uses a supercritical fluid in place of real gas. In the approach, solid-metal diaphragms are used to seal and sweep the working volumes against the high working fluid pressures required in Malone cycle machines. This feature eliminates the friction and leakage that accounted for nearly half the losses in the best piston-defined Malone cycle machines built to date. The authors successfully built a Malone cycle refrigerator that: (1) used CO{sub 2} as the working fluid, (2) operated at pressures up to 19.3 Mpa (2,800 psi), (3) achieved a cold end metal temperatures of {minus}29 C ({minus}20 F), and (4) produced over 400 Watts of cooling at near ambient temperatures. The critical diaphragm components operated flawlessly throughout characterization and performance testing, supporting the conclusion of high reliability based on analysis of fatigue date and actual strain measurements.

Shimko, M.A.; Crowley, C.J.

1999-07-01T23:59:59.000Z

394

GREET Bioenergy Life Cycle Analysis and Key Issues for Woody Feedstocks  

Broader source: Energy.gov [DOE]

Breakout Session 2DBuilding Market Confidence and Understanding II: Carbon Accounting and Woody Biofuels GREET Bioenergy Life Cycle Analysis and Key Issues for Woody Feedstocks Michael Wang, Senior Scientist, Energy Systems, Argonne National Laboratory

395

Preliminary thermodynamic study for an efficient turbo-blower external combustion Rankine cycle  

Science Journals Connector (OSTI)

This research paper presents a preliminary thermodynamic study of an innovative power plant operating under a Rankine cycle fed by an external combustion system with ... a heat exchanger, to a carbon dioxide Rankine

Manuel Romero Gmez; Javier Romero Gmez; Ramn Ferreiro Garcia

2014-08-01T23:59:59.000Z

396

The role of Life Cycle Assessment in identifying and reducing environmental impacts of CCS  

E-Print Network [OSTI]

M, Deschnes L, Samson R. 2010. Considering time in LCA:Dynamic LCA and its application to global warming impactLife Cycle Assessment (LCA) should be used to assist carbon

Sathre, Roger

2011-01-01T23:59:59.000Z

397

Assessing Options for Electricity Generation from Biomass on a Life Cycle Basis: Environmental and Economic Evaluation  

Science Journals Connector (OSTI)

Co-firing biomass with coal is being increasingly seen in the EU ... direct emissions of pollutants generated during combustion of coal, including carbon dioxide, sulphur dioxide and ... cycle approach to evaluat...

Harish Kumar Jeswani; Haruna Gujba; Adisa Azapagic

2011-02-01T23:59:59.000Z

398

Renewable Electricity Futures (Presentation)  

SciTech Connect (OSTI)

This presentation library summarizes findings of NREL's Renewable Electricity Futures study, published in June 2012. RE Futures investigated the challenges and impacts of achieving very high renewable electricity generation levels in the contiguous United States by 2050. It was presented at Wind Powering America States Summit. The Summit, which follows the American Wind Energy Association's (AWEA's) annual WINDPOWER Conference and Exhibition, provides state Wind Working Groups, state energy officials, U.S. Energy Department and national laboratory representatives, and professional and institutional partners an opportunity to review successes, opportunities, and challenges for wind energy and plan future collaboration.

DeMeo, E.

2012-08-01T23:59:59.000Z

399

FutureGen 2.0 | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Clean Coal » Major Demonstrations » Clean Coal » Major Demonstrations » FutureGen 2.0 FutureGen 2.0 On August 5, 2010, U.S. Energy Secretary Steven Chu announced the awarding of $1 billion in Recovery Act funding to the FutureGen Alliance, Ameren Energy Resources, Babcock & Wilcox, and Air Liquide Process & Construction, Inc. to build FutureGen 2.0, a clean coal repowering program and carbon dioxide (CO2) storage network. The project partners will repower Ameren's 200 megawatt Unit 4 in Meredosia, Illinois with advanced oxy-combustion technology to capture approximately 1.3 million tonnes of CO2 each year - more than 90 percent of the plant's carbon emissions. Other emissions will be reduced to near zero levels. Oxy-combustion burns coal with a mixture of oxygen and CO2 instead of air

400

Collaborative future event recommendation  

E-Print Network [OSTI]

We demonstrate a method for collaborative ranking of future events. Previous work on recommender systems typically relies on feedback on a particular item, such as a movie, and generalizes this to other items or other ...

Minkov, Einat

Note: This page contains sample records for the topic "future carbon 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

3 - Life cycle assessment (LCA) aspects of concrete  

Science Journals Connector (OSTI)

Abstract: The concrete industry is considered to be a large consumer of energy and natural resources, and is one of the main sources of greenhouse emissions and waste generation. The production and utilization of concrete and concrete structures have a large impact on the environment, and so the environmental assessment of concrete is of great importance in terms of achieving a sustainable society. This chapter includes instructions on how to apply the life cycle assessment (LCA) methodology to concrete, including a general description, life cycle inventory and life cycle impact assessment of concrete, future trends and sources of further information.

S.B. Marinkovi?

2013-01-01T23:59:59.000Z

402

Deployment Models for Commercialized Carbon Capture and Storage  

Science Journals Connector (OSTI)

Deployment Models for Commercialized Carbon Capture and Storage ... Several proposed integrated gasification-combined cycle and postcombustion coal CO2 capture projects are teaming with oil companies for use of the captured CO2 in EOR. ...

Richard A. Esposito; Larry S. Monroe; Julio S. Friedman

2010-08-19T23:59:59.000Z

403

Electrochemically-mediated amine regeneration for carbon dioxide separations  

E-Print Network [OSTI]

This thesis describes a new strategy for carbon dioxide (CO?) separations based on amine sorbents, which are electrochemically-mediated to facilitate the desorption and regeneration steps of the separation cycle. The ...

Stern, Michael C. (Michael Craig)

2014-01-01T23:59:59.000Z

404

Preparing for the Future  

E-Print Network [OSTI]

tx H2O | pg. 12 Preparing for the Future Story by Kathy Wythe Preparing for the Future University establishes water management degree program Texas A&M University launched an interdisci-plinary water management degree programduring the fall... 2005 semester with 12 stu-dents seeking either master?s or doctorate degrees in water management and hydrologic sciences. The degree program, the first in Texas, includes 42 faculty members in 12 departments from four differ- ent colleges, said Ron...

Wythe, Kathy

2006-01-01T23:59:59.000Z

405

Buying Hedge with Futures  

E-Print Network [OSTI]

Agricultural Economist, Kansas State University Agricultural Experiment Station and Cooperative Extension Service. Many bulk purchasers of agricultural com- modities need price risk management tools to help stabilize input prices. Livestock feeders... anticipating future feed needs or grain export- ers making commitments to sell grain are two users of agricultural commodities who could benefit from input price management strate- gies. A common tool is a buying, or long, hedge using futures. Producers...

Welch, Mark; Kastens, Terry L.

2009-01-07T23:59:59.000Z

406

Renewable Electricity Futures (Presentation)  

SciTech Connect (OSTI)

This presentation library summarizes findings of NREL's Renewable Electricity Futures study, published in June 2012. RE Futures investigated the challenges and impacts of achieving very high renewable electricity generation levels in the contiguous United States by 2050. It was presented to the 2012 Western Conference of Public Service Commissioners, during their June, 2012, meeting. The Western Conference of Public Service Commissioners is a regional association within the National Association of Regulatory Utility Commissioners (NARUC).

Hand, M. M.

2012-08-01T23:59:59.000Z

407

RESEARCH Open Access Short and long-term carbon balance of bioenergy  

E-Print Network [OSTI]

, and the occurrence and intensity of a future wildfire in this stand. In this study we investigate the carbon balance is a carbon intensive energy source; in our study we find that carbon emissions from bioenergy electricityRESEARCH Open Access Short and long-term carbon balance of bioenergy electricity production fueled

408

Accounting for forest carbon pool dynamics in product carbon footprints: Challenges and opportunities  

SciTech Connect (OSTI)

Modification and loss of forests due to natural and anthropogenic disturbance contribute an estimated 20% of annual greenhouse gas (GHG) emissions worldwide. Although forest carbon pool modeling rarely suggests a 'carbon neutral' flux profile, the life cycle assessment community and associated product carbon footprint protocols have struggled to account for the GHG emissions associated with forestry, specifically, and land use generally. Principally, this is due to underdeveloped linkages between life cycle inventory (LCI) modeling for wood and forest carbon modeling for a full range of forest types and harvest practices, as well as a lack of transparency in globalized forest supply chains. In this paper, through a comparative study of U.S. and Chinese coated freesheet paper, we develop the initial foundations for a methodology that rescales IPCC methods from the national to the product level, with reference to the approaches in three international product carbon footprint protocols. Due to differences in geographic origin of the wood fiber, the results for two scenarios are highly divergent. This suggests that both wood LCI models and the protocols need further development to capture the range of spatial and temporal dimensions for supply chains (and the associated land use change and modification) for specific product systems. The paper concludes by outlining opportunities to measure and reduce uncertainty in accounting for net emissions of biogenic carbon from forestland, where timber is harvested for consumer products. - Highlights: Black-Right-Pointing-Pointer Typical life cycle assessment practice for consumer products often excludes significant land use change emissions when estimating carbon footprints. Black-Right-Pointing-Pointer The article provides a methodology to rescale IPCC guidelines for product-level carbon footprints. Black-Right-Pointing-Pointer Life cycle inventories and product carbon footprint protocols need more comprehensive land use-related accounting. Black-Right-Pointing-Pointer Interdisciplinary collaboration linking the LCA and forest carbon modeling communities is necessary.

Newell, Joshua P., E-mail: jpnewell@umich.edu [School of Natural Resources and Environment, University of Michigan, Ann Arbor (United States); Vos, Robert O., E-mail: vos@usc.edu [Spatial Sciences Institute, University of Southern California (United States)

2012-11-15T23:59:59.000Z

409

Damping of glacial-interglacial cycles from anthropogenic forcing  

E-Print Network [OSTI]

Climate variability over the past million years shows a strong glacial-interglacial cycle of ~100,000 years as a combined result of Milankovitch orbital forcing and climatic resonance. It has been suggested that anthropogenic contributions to radiative forcing may extend the length of the present interglacial, but the effects of anthropogenic forcing on the periodicity of glacial-interglacial cycles has received little attention. Here I demonstrate that moderate anthropogenic forcing can act to damp this 100,000 year cycle and reduce climate variability from orbital forcing. Future changes in solar insolation alone will continue to drive a 100,000 year climate cycle over the next million years, but the presence of anthropogenic warming can force the climate into an ice-free state that only weakly responds to orbital forcing. Sufficiently strong anthropogenic forcing that eliminates the glacial-interglacial cycle may serve as an indication of an epoch transition from the Pleistocene to the Anthropocene.

Haqq-Misra, Jacob

2014-01-01T23:59:59.000Z

410

Carbon Capture and Storage  

SciTech Connect (OSTI)

Carbon capture and sequestration (CCS) is the long-term isolation of carbon dioxide from the atmosphere through physical, chemical, biological, or engineered processes. This includes a range of approaches including soil carbon sequestration (e.g., through no-till farming), terrestrial biomass sequestration (e.g., through planting forests), direct ocean injection of CO{sub 2} either onto the deep seafloor or into the intermediate depths, injection into deep geological formations, or even direct conversion of CO{sub 2} to carbonate minerals. Some of these approaches are considered geoengineering (see the appropriate chapter herein). All are considered in the 2005 special report by the Intergovernmental Panel on Climate Change (IPCC 2005). Of the range of options available, geological carbon sequestration (GCS) appears to be the most actionable and economic option for major greenhouse gas reduction in the next 10-30 years. The basis for this interest includes several factors: (1) The potential capacities are large based on initial estimates. Formal estimates for global storage potential vary substantially, but are likely to be between 800 and 3300 Gt of C (3000 and 10,000 Gt of CO{sub 2}), with significant capacity located reasonably near large point sources of the CO{sub 2}. (2) GCS can begin operations with demonstrated technology. Carbon dioxide has been separated from large point sources for nearly 100 years, and has been injected underground for over 30 years (below). (3) Testing of GCS at intermediate scale is feasible. In the US, Canada, and many industrial countries, large CO{sub 2} sources like power plants and refineries lie near prospective storage sites. These plants could be retrofit today and injection begun (while bearing in mind scientific uncertainties and unknowns). Indeed, some have, and three projects described here provide a great deal of information on the operational needs and field implementation of CCS. Part of this interest comes from several key documents written in the last three years that provide information on the status, economics, technology, and impact of CCS. These are cited throughout this text and identified as key references at the end of this manuscript. When coupled with improvements in energy efficiency, renewable energy supplies, and nuclear power, CCS help dramatically reduce current and future emissions (US CCTP 2005, MIT 2007). If CCS is not available as a carbon management option, it will be much more difficult and much more expensive to stabilize atmospheric CO{sub 2} emissions. Recent estimates put the cost of carbon abatement without CCS to be 30-80% higher that if CCS were to be available (Edmonds et al. 2004).

Friedmann, S

2007-10-03T23:59:59.000Z

411

Role of nuclear fusion in future energy systems and the environment under future uncertainties  

Science Journals Connector (OSTI)

Debates about whether or not to invest heavily in nuclear fusion as a future innovative energy option have been made within the context of energy technology development strategies. This is because the prospects for nuclear fusion are quite uncertain and the investments therefore carry the risk of quite large regrets, even though investment is needed in order to develop the technology. The timeframe by which nuclear fusion could become competitive in the energy market has not been adequately studied, nor has roles of the nuclear fusion in energy systems and the environment. The present study has two objectives. One is to reveal the conditions under which nuclear fusion could be introduced economically (hereafter, we refer to such introductory conditions as breakeven prices) in future energy systems. The other objective is to evaluate the future roles of nuclear fusion in energy systems and in the environment. Here we identify three roles that nuclear fusion will take on when breakeven prices are achieved: (i) a portion of the electricity market in 2100, (ii) reduction of annual global total energy systems cost, and (iii) mitigation of carbon tax (shadow price of carbon) under CO2 constraints. Future uncertainties are key issues in evaluating nuclear fusion. Here we treated the following uncertainties: energy demand scenarios, introduction timeframe for nuclear fusion, capacity projections of nuclear fusion, CO2 target in 2100, capacity utilization ratio of options in energy/environment technologies, and utility discount rates. From our investigations, we conclude that the presently designed nuclear fusion reactors may be ready for economical introduction into energy systems beginning around 20502060, and we can confirm that the favorable introduction of the reactors would reduce both the annual energy systems cost and the carbon tax (the shadow price of carbon) under a CO2 concentration constraint.

Koji Tokimatsu; Junichi Fujino; Satoshi Konishi; Yuichi Ogawa; Kenji Yamaji

2003-01-01T23:59:59.000Z

412

Silicon nanoparticle and carbon nanotube loaded carbon nanofibers for use in lithium-ion battery anodes  

Science Journals Connector (OSTI)

Abstract In this report, we introduce electrospun silicon nanoparticle and carbon nanotube loaded carbon nanofibers (SCNFs) as anode materials in lithium-ion batteries (LIBs). The one-dimensional structure of electrospun nanofibers provides porosity for the anode material. Carbon nanotubes (CNTs) in the electrospun fibers reduce the volume expansion of silicon nanoparticles (SiNPs) and improve mechanical stability of the electrode. Both \\{CNTs\\} and carbon nanofibers enhance electronic conduction by connecting SiNPs in \\{SCNFs\\} for electrode reactions. These contribute to improved electrochemical performance of SCNF anode-based \\{LIBs\\} resulting in the enhancement of capacity and cycling ability.

Nguyen Trung Hieu; Jungdon Suk; Dong Wook Kim; Ok Hee Chung; Jun Seo Park; Yongku Kang

2014-01-01T23:59:59.000Z

413

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

414

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

415

A Computational Study on the Thermal-Hydraulic Behavior of Supercritical Carbon Dioxide in Various Printed Circuit Heat Exchanger Designs  

E-Print Network [OSTI]

that will bridge the gap between energy production and consumption. To decrease the high demand alternative fuel sources are gaining in popularity. The supercritical carbon dioxide Brayton power cycle has been proposed as a possible cycle for nuclear...

Matsuo, Bryce

2013-02-04T23:59:59.000Z

416

Fueling Future with Algal Genomics  

SciTech Connect (OSTI)

Algae constitute a major component of fundamental eukaryotic diversity, play profound roles in the carbon cycle, and are prominent candidates for biofuel production. The US Department of Energy Joint Genome Institute (JGI) is leading the world in algal genome sequencing (http://jgi.doe.gov/Algae) and contributes of the algal genome projects worldwide (GOLD database, 2012). The sequenced algal genomes offer catalogs of genes, networks, and pathways. The sequenced first of its kind genomes of a haptophyte E.huxleyii, chlorarachniophyte B.natans, and cryptophyte G.theta fill the gaps in the eukaryotic tree of life and carry unique genes and pathways as well as molecular fossils of secondary endosymbiosis. Natural adaptation to conditions critical for industrial production is encoded in algal genomes, for example, growth of A.anophagefferens at very high cell densities during the harmful algae blooms or a global distribution across diverse environments of E.huxleyii, able to live on sparse nutrients due to its expanded pan-genome. Communications and signaling pathways can be derived from simple symbiotic systems like lichens or complex marine algae metagenomes. Collectively these datasets derived from algal genomics contribute to building a comprehensive parts list essential for algal biofuel development.

Grigoriev, Igor

2012-07-05T23:59:59.000Z

417

NETL: Gasifipedia - Carbon Sequestration  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Coal: SNG from Coal: Process & Commercialization: Carbon Sequestration Coal: SNG from Coal: Process & Commercialization: Carbon Sequestration Carbon sequestration, also termed carbon storage, is the permanent storage of CO2, usually in deep geologic formations. Industrially-generated CO2 -- resulting from fossil fuel combustion, gasification, and other industrial processes -- is injected as a supercritical fluid into geologic reservoirs, where it is held in place by natural traps and seals. Carbon storage is one approach to minimizing atmospheric emissions of man-made CO2. As discussed above, the main purpose of CO2 EOR such as the Weyburn Project is tertiary recovery of crude oil, but in effect substantial CO2 remains sequestered/stored as a result. Current Status of CO2 Storage CO2 storage is currently underway in the United States and around the world. Large, commercial-scale projects, like the Sleipner CO2 Storage Site in Norway and the Weyburn-Midale CO2 Project in Canada, have been injecting CO2 into geologic storage formations more than a decade. Each of these projects stores more than 1 million tons of CO2 per year. Large-scale efforts are currently underway in Africa, China, Australia, and Europe, as well. These commercial-scale projects are demonstrating that large volumes of CO2 can be safely and permanently stored. In addition, a number of smaller pilot projects are underway in different parts of the world to determine suitable locations and technologies for future long-term CO2 storage. To date, more than 200 small-scale CO2 storage projects have been carried out worldwide. A demonstration project that captures CO2 from a pulverized coal power plant and pipes it to a geologic formation for storage recently came online in Alabama.

418

Future Climate Analysis  

SciTech Connect (OSTI)

This Analysis/Model Report (AMR) documents an analysis that was performed to estimate climatic variables for the next 10,000 years by forecasting the timing and nature of climate change at Yucca Mountain (YM), Nevada (Figure 1), the site of a potential repository for high-level radioactive waste. The future-climate estimates are based on an analysis of past-climate data from analog meteorological stations, and this AMR provides the rationale for the selection of these analog stations. The stations selected provide an upper and a lower climate bound for each future climate, and the data from those sites will provide input to the infiltration model (USGS 2000) and for the total system performance assessment for the Site Recommendation (TSPA-SR) at YM. Forecasting long-term future climates, especially for the next 10,000 years, is highly speculative and rarely attempted. A very limited literature exists concerning the subject, largely from the British radioactive waste disposal effort. The discussion presented here is one method, among many, of establishing upper and lower bounds for future climate estimates. The method used here involves selecting a particular past climate from many past climates, as an analog for future climate. Other studies might develop a different rationale or select other past climates resulting in a different future climate analog. Revision 00 of this AMR was prepared in accordance with the ''Work Direction and Planning Document for Future Climate Analysis'' (Peterman 1999) under Interagency Agreement DE-AI08-97NV12033 with the U.S. Department of Energy (DOE). The planning document for the technical scope, content, and management of ICN 01 of this AMR is the ''Technical Work Plan for Unsaturated Zone (UZ) Flow and Transport Process Model Report'' (BSC 2001a). The scope for the TBV resolution actions in this ICN is described in the ''Technical Work Plan for: Integrated Management of Technical Product Input Department''. (BSC 2001b, Addendum B, Section 4.1).

James Houseworth

2001-10-12T23:59:59.000Z

419

Carbon Sequestration  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

David a. Lang David a. Lang Project Manager National Energy Technology Laboratory 626 Cochrans Mill Road P.O. Box 10940 Pittsburgh, PA 15236 412-386-4881 david.lang@netl.doe.gov andrew chizmeshya Arizona State University Center for Solid State Science Tempe, AZ 85287-1704 480-965-6072 chizmesh@asu.edu A Novel ApproAch to MiNerAl cArboNAtioN: eNhANciNg cArboNAtioN While AvoidiNg MiNerAl pretreAtMeNt process cost Background Carbonation of the widely occurring minerals of the olivine group, such as forsterite (Mg 2 SiO 4 ), is a potential large-scale sequestration process that converts CO 2 into the environmentally benign mineral magnesite (MgCO 3 ). Because the process is exothermic, it inherently offers low-cost potential. Enhancing carbonation reactivity is the key to economic viability. Previous

420

Carbon Nanotubes  

Science Journals Connector (OSTI)

A broad review of the structure and properties of carbon nanotubes is presented. Particular emphasis is given to ... dimensional density of states predicted for single-wall nanotubes of small diameter. The eviden...

M. S. Dresselhaus; G. Dresselhaus

2000-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "future carbon 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

Carbon Fiber  

ScienceCinema (OSTI)

Lee McGetrick leads ORNL's effort to produce light, durable carbon fiber at lower cost -- a key to improvements in manufacturing that will produce more fuel-efficient vehicles and other advances.

McGetrick, Lee

2014-07-23T23:59:59.000Z

422

Carbon Fiber  

SciTech Connect (OSTI)

Lee McGetrick leads ORNL's effort to produce light, durable carbon fiber at lower cost -- a key to improvements in manufacturing that will produce more fuel-efficient vehicles and other advances.

McGetrick, Lee

2014-04-17T23:59:59.000Z

423

Power Plant Cycling Costs  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (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

424

Life Cycle Assessment and Grid Electricity: What Do We Know and  

E-Print Network [OSTI]

explore the limits of current knowledge about grid electricity in LCA and carbon footprinting for the U cycle assessment and policy analyses in a world with incomplete and uncertain information. Introduction drivers in regional greenhouse gas intensity and in region-specific life cycle inventories (4). However

Jaramillo, Paulina

425

Fuel Life-Cycle Analysis of Hydrogen vs. Conventional Transportation Fuels.  

E-Print Network [OSTI]

??Fuel life-cycle analyses were performed to compare the affects of hydrogen on annual U.S. light-duty transportation emissions in future year 2030. Five scenarios were developed (more)

DeGolyer, Jessica Suzanne

2008-01-01T23:59:59.000Z

426

Forest Carbon Index | Open Energy Information  

Open Energy Info (EERE)

Forest Carbon Index Forest Carbon Index Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Forest Carbon Index Agency/Company /Organization: Resources for the Future Partner: United Nations Foundation Sector: Land Focus Area: Forestry Topics: Finance, GHG inventory, Market analysis Resource Type: Maps, Software/modeling tools User Interface: Website Website: www.forestcarbonindex.org/ Web Application Link: www.forestcarbonindex.org/maps.html Cost: Free References: Forest Carbon Index [1] The Forest Carbon Index (FCI) compiles and displays global data relating to biological, economic, governance, investment, and market readiness conditions for every forest and country in the world, revealing the best places and countries for forest carbon investments. Please use this site to

427

Life cycle assessment of 50MW wind firms and strategies for impact reduction  

Science Journals Connector (OSTI)

The world today is continuously striving toward a carbon neutral clean energy technology. Hence, renewable wind power systems are increasingly receiving the attention of mankind. Energy production with structurally more promising and economically more competitive design is no more the sole criterion while installing new megawatt (MW) range of turbines. Rather important life cycle analysis (LCA) issues like climate change, ozone layer depletion, effect on surrounding environments e.g. eco-system quality, natural resources and human health emerge as dominant factors from green energy point of view. Hence, the study covers life cycle impact analysis (LCIA) of three wind farms: one onshore horizontal, one offshore horizontal, another vertical axis. It appears that vertical axis wind farm generates per unit electricity with lowest impact followed by horizontal offshore and horizontal onshore farms. The study, henceforward, discovers most adverse impact contributing materials in today's multi megawatt wind turbines and subsequently substitutes copper, the topmost impact contributor, with more eco-friendly aluminum alloys and its corresponding process routes. In this process, it reduces overall life cycle impacts up to 30% for future greener wind farms. In later stages, it compares all major electricity production technologies, viz., oil, diesel, coal, natural gas, wind, solar, biomass, nuclear, hydro plant in a common platform which demonstrates the wind farms performing the best except the hydro-kinetic ones. However, as the study suggests, offshore VAWT farm may even perform better than hydro-kinetic farms because of higher capacity factors in the high sea. Findings from the study can be deployed to harness massive scale green electricity from environmentally more clean and green turbines.

A. Rashedi; I. Sridhar; K.J. Tseng

2013-01-01T23:59:59.000Z

428

Status and outlook for Thailand's low carbon electricity development  

Science Journals Connector (OSTI)

Thailand is facing an urgency to enhance its energy security and capacity to cope with global warming impacts, as demands on fossil fuel consumption keep rising. This paper reviewed the latest situation on renewable powers and developmental strategies toward low carbon electricity generation in Thailand. Government recently has spent tremendous financial and legislative supports to promote the uses of indigenous renewable energy resources and fuel diversification while contributing in reduction of global greenhouse gas. Major policy challenge is on which types of renewable energy should be more pronounced to ensure sustainable future of the country. Regions in Thailand present different potentials for renewable supply on biomass, municipal wastes, hydropower, and wind. To maximize renewable energy development in each area, location is matter. Currently, energy-derived biomass is widely utilized within the country, however if droughts happen more often and severe, it will not only affect food security but also energy security. Life cycle of biomass energy production may cause other social issues on land and chemical uses. Meanwhile, deployment of wind and solar energy has been slow and needs to speed up to the large extent in comparison with energy proportion from biomass. Nuclear power has already been included in the Thai power development plan 2010 (PDP-2010). However, public acceptance is a major issue. Setting up strategic renewable energy zone to support power producer according to pre-determined potential location may assist development direction. Furthermore, government has to strongly subsidize research and development to lower technology cost and promote private investment on renewable energy industry. In the future, revision of electricity price is needed to allow fair competition between non-renewable and renewable energy once subsidy programs are ended. Environmental tax according to fuel types could help government progressing toward low carbon electricity. Stimulating renewable energy development and utilization at local community is a key for Thai sufficiency economy.

Narumitr Sawangphol; Chanathip Pharino

2011-01-01T23:59:59.000Z

429

Introduction to Futures Markets  

E-Print Network [OSTI]

in Chicago. To reduce their risk exposure, grain dealers began selling ?To Arrive? contracts, which specified the future date (usually the month) a speci- fied quantity of grain would be delivered to a particular location at a price identified... in the contract. Fixing the price in advance of deliv- ery reduced the grain dealer?s risk and made it easier to obtain credit to finance grain purchas- es from farmers. The ?To Arrive? contracts were a forerunner of the futures contracts traded today. Although...

Mintert, James R.; Welch, Mark

2009-01-07T23:59:59.000Z

430

Future Climate Analysis  

SciTech Connect (OSTI)

This report documents an analysis that was performed to estimate climatic variables for the next 10,000 years by forecasting the timing and nature of climate change at Yucca Mountain, Nevada, the site of a repository for spent nuclear fuel and high-level radioactive waste. The future-climate estimates are based on an analysis of past-climate data from analog meteorological stations, and this report provides the rationale for the selection of these analog stations. The stations selected provide an upper and a lower climate bound for each future climate, and the data from those sites will provide input to the following reports: ''Simulation of Net Infiltration for Present-Day and Potential Future Climates'' (BSC 2004 [DIRS 170007]), ''Total System Performance Assessment (TSPA) Model/Analysis for the License Application'' (BSC 2004 [DIRS 168504]), ''Features, Events, and Processes in UZ Flow and Transport'' (BSC 2004 [DIRS 170012]), and ''Features, Events, and Processes in SZ Flow and Transport'' (BSC 2004 [DIRS 170013]). Forecasting long-term future climates, especially for the next 10,000 years, is highly speculative and rarely attempted. A very limited literature exists concerning the subject, largely from the British radioactive waste disposal effort. The discussion presented here is one available forecasting method for establishing upper and lower bounds for future climate estimates. The selection of different methods is directly dependent on the available evidence used to build a forecasting argument. The method used here involves selecting a particular past climate from many past climates, as an analog for future climate. While alternative analyses are possible for the case presented for Yucca Mountain, the evidence (data) used would be the same and the conclusions would not be expected to drastically change. Other studies might develop a different rationale or select other past climates resulting in a different future climate analog. Other alternative approaches could include simulation of climate over the 10,000-year period; however, this modeling extrapolation is well beyond the bounds of current scientific practice and would not provide results with better confidence. A corroborative alternative approach may be found in ''Future Climate Analysis-10,000 Years to 1,000,000 Years After Present'' (Sharpe 2003 [DIRS 161591]). The current revision of this report is prepared in accordance with ''Technical Work Plan for: Unsaturated Zone Flow Analysis and Model Report Integration'' (BSC 2004 [DIRS 169654]).

C. G. Cambell

2004-09-03T23:59:59.000Z

431

Renewable Electricity Futures (Presentation)  

SciTech Connect (OSTI)

This presentation library summarizes findings of NREL's Renewable Electricity Futures study, published in June 2012. RE Futures investigated the challenges and impacts of achieving very high renewable electricity generation levels in the contiguous United States by 2050. It was presented at the 2012 RE AMP Annual Meeting. RE-AMP is an active network of 144 nonprofits and foundations across eight Midwestern states working on climate change and energy policy with the goal of reducing global warming pollution economy-wide 80% by 2050.

Mai, T.

2012-08-01T23:59:59.000Z

432

mathematical Study program cycle  

E-Print Network [OSTI]

TSW ECTS TSW Fundamentals of statistics 2 2 0 5 150 0 0 0 0 0 5 150 Probability 4 3 0 10 300 0 0 0 0 0127 mathematical statistics Master's study programms #12;128 #12;· Study program cycle: Second Statistics. In Slovenian: magister matematicne statistike (masculine), magistrica matematicne statistike

?umer, Slobodan

433

CLASS DESCRIPTIONS CYCLING SERIES  

E-Print Network [OSTI]

will utilize concepts from the 50-minute cycling class while going the distance to optimal health. Whether you're an avid cyclist, triathlete, or desire a longer class for a greater challenge, join us for this 75-minute AN URBANATHLETE Are you registered to compete in an adventure race like the Men's Health Urbanathlon, Warrior Dash

Pittendrigh, Barry

434

Feasibility Study of a Multi-Purpose Computer Program for Optimizing Heat Rates in Power Cycles  

E-Print Network [OSTI]

and future needs of the power industry follows. The discussion is restricted to steam turbine cycles of fossil or nuclear power plants, although some ECC's can be employed to a wider range of applications, such as analysis of different heat sources... and future needs of the power industry follows. The discussion is restricted to steam turbine cycles of fossil or nuclear power plants, although some ECC's can be employed to a wider range of applications, such as analysis of different heat sources...

Menuchin, Y.; Singh, K. P.; Hirota, N.

1981-01-01T23:59:59.000Z

435

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

436

Department of Energy and FutureGen Alliance Discuss Next Steps for  

Broader source: Energy.gov (indexed) [DOE]

and FutureGen Alliance Discuss Next Steps for and FutureGen Alliance Discuss Next Steps for FutureGen 2.0 in Illinois Department of Energy and FutureGen Alliance Discuss Next Steps for FutureGen 2.0 in Illinois August 20, 2010 - 1:00pm Addthis Washington, DC - Officials from the Department of Energy, the state of Illinois, Ameren, Babcock & Wilcox, American Air Liquide and the FutureGen Alliance discussed the next steps for the FutureGen 2.0 carbon capture and storage project in Illinois. The project remains on track for obligation before the end of September. Preparations will then begin for the repowering of Unit 4 at the Ameren facility in Meredosia, with construction set to begin in 2012. At the same time, following DOE best practices, a site selection process will be conducted to locate a site for the carbon

437

NETL: Carbon Storage - Knowledge Sharing  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Knowledge Sharing Knowledge Sharing Carbon Storage Knowledge Sharing Outreach Efforts at SECARB's Anthropogenic Test Site in Alabama Outreach Efforts at SECARB's Anthropogenic Test Site in Alabama In order to achieve the commercialization of CO2 storage technologies, the U.S. Department of Energy (DOE) acknowledges that knowledge sharing between various entities is essential. Distribution of the results and lessons learned from both field projects and Core R&D efforts will provide the foundation for future, large-scale CCS field tests across North America and in addressing future challenges associated with public acceptance, infrastructure (pipelines, compressor stations, etc.), and regulatory framework. DOE promotes information and knowledge sharing through various avenues including the Regional Carbon Sequestration Partnerships (RCSP)

438

An observing system simulation for Southern Ocean carbon dioxide uptake  

Science Journals Connector (OSTI)

...components of the global carbon cycle in the CMIP5 Earth system models. J. Clim. 26, 6801-6843. ( doi:10.1175...2012 GFDL's ESM2 global coupled climate-carbon Earth system models. Part I: physical formulation and baseline simulation...

2014-01-01T23:59:59.000Z

439

Blue Ribbon Commission on America's Nuclear Future Charter | Department of  

Broader source: Energy.gov (indexed) [DOE]

Blue Ribbon Commission on America's Nuclear Future Charter Blue Ribbon Commission on America's Nuclear Future Charter Blue Ribbon Commission on America's Nuclear Future Charter March 2, 2010 - 12:00am Addthis The Secretary of Energy, acting at the direction of the President, is establishing the Commission to conduct a comprehensive review of policies for managing the back end of the nuclear fuel cycle, including all alternatives for the storage, processing, and disposal of civilian and defense used nuclear fuel, high-level waste, and materials derived from nuclear activities. Specifically, the Commission will provide advice, evaluate alternatives, and make recommendations for a new plan to address these issues, including: Evaluation of existing fuel cycle technologies and R&D programs. Criteria for evaluation should include cost, safety, resource utilization

440

Future of Optical Astronomy  

Science Journals Connector (OSTI)

... I BELIEVE that optical astronomy in Great Britain has now reached, for virtually the first time in its history, ... studied in universities and in Government and industrial laboratories; but with two exceptions, optical astronomy is studied almost entirely in university laboratories only, and its future largely depends on ...

D. E. BLACKWELL

1962-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "future carbon 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

Quantum motor and future  

E-Print Network [OSTI]

In a popular language, the possibilities of the Casimir expulsion effect are presented, which can be the basis of quantum motors. Such motors can be in the form of a special multilayer thin film with periodic and complex nanosized structures. Quantum motors of the type of the Casimir platforms can be the base of transportation, energy and many other systems in the future.

Fateev, Evgeny G

2013-01-01T23:59:59.000Z

442

Quantum motor and future  

E-Print Network [OSTI]

In a popular language, the possibilities of the Casimir expulsion effect are presented, which can be the basis of quantum motors. Such motors can be in the form of a special multilayer thin film with periodic and complex nanosized structures. Quantum motors of the type of the Casimir platforms can be the base of transportation, energy and many other systems in the future.

Evgeny G. Fateev

2013-01-20T23:59:59.000Z

443

Simulation in the future  

Science Journals Connector (OSTI)

Seven panelists, all simulation consultants, give their view of the future of simulation. There is some consistency in the views with four areas being mentioned by three of the panelists, and four areas being mentioned by two of the panelists. However, ...

Jerry Banks

2000-12-01T23:59:59.000Z

444

Food for the Future  

Science Journals Connector (OSTI)

...harnessing free sources of energy, includ-ing the...volcanoes, and thermal gradients of the...exchangers, wind converters, and tide tur-bines...with quantities of energy of the magnitude...Fresh Water from the Ocean (Con-servation...P. C. Putnam, Energy in the Future (Van...

J. G. Harrar

1955-08-19T23:59:59.000Z

445

DOE Hydrogen Analysis Repository: Life Cycle Analysis of Vehicles for  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Life Cycle Analysis of Vehicles for Canada Life Cycle Analysis of Vehicles for Canada Project Summary Full Title: Life Cycle Analysis of Vehicles Powered by a Fuel Cell and by Internal Combustion Engine for Canada Project ID: 117 Principal Investigator: Xianguo Li Purpose In this study, a full life cycle analysis of an internal combustion engine vehicle (ICEV) and a fuel cell vehicle (FCV) has been carried out. The impact of the material and fuel used in the vehicle on energy consumption and carbon dioxide emissions is analyzed for Canada. Four different methods of obtaining hydrogen were analyzed; using coal and nuclear power to produce electricity and extraction of hydrogen through electrolysis and via steam reforming of natural gas in a natural gas plant and in a hydrogen refueling station.

446

Low Carbon Fuel Standards  

E-Print Network [OSTI]

gas, or even coal with carbon capture and sequestration. Afuels that facilitate carbon capture and sequestration. Forenergy and could capture and sequester carbon emissions.

Sperling, Dan; Yeh, Sonia

2009-01-01T23:59:59.000Z

447

Investigation of combined-cycle steam-plant problems. Final report  

SciTech Connect (OSTI)

The operation and maintenance of gas turbine combined-cycle steam generators is reviewed. Feedwater cycles and auxiliary equipment are also discussed, and the results of on-site discussions with operating and maintenance personnel are presented. Actual problems encountered are delineated, and recommendations are given for improving operation of existing plants, for design of new plants, and for future research and development.

Crutchfield, H.C.

1982-07-01T23:59:59.000Z

448

Progress and status of the Integral Fast Reactor (IFR) fuel cycle development  

SciTech Connect (OSTI)

The Integral Fast Reactor (IFR) fuel cycle holds promise for substantial improvements in economics, diversion-resistance, and waste management. This paper discusses technical features of the IFR fuel cycle, its technical progress, the development status, and the future plans and directions.

Till, C.E.; Chang, Y.I.

1993-01-01T23:59:59.000Z

449

Progress and status of the Integral Fast Reactor (IFR) fuel cycle development  

SciTech Connect (OSTI)

The Integral Fast Reactor (IFR) fuel cycle holds promise for substantial improvements in economics, diversion-resistance, and waste management. This paper discusses technical features of the IFR fuel cycle, its technical progress, the development status, and the future plans and directions.

Till, C.E.; Chang, Y.I.

1993-03-01T23:59:59.000Z

450

Progress and status of the Integral Fast Reactor (IFR) fuel cycle development  

SciTech Connect (OSTI)

The Integral Fast Reactor (IFR) fuel cycle holds promise for substantial improvements in economics, diversion-resistance, and waste management. This paper discusses technical features of the IFR fuel cycle, its technical progress, the development status, and the future plans and directions. 10 refs.

Till, C.E.; Chang, Y.I.

1991-01-01T23:59:59.000Z

451

Pathways and Mechanisms of OceanTracer Transport: Implications for Carbon Sequestration  

SciTech Connect (OSTI)

This funding enabled the following published manuscripts in which we have developed models of direct relevance to ocean carbon sequestration and of the oceanic iron cycle, its connection to the global carbon cycle, and the sensitivity of atmospheric carbon dioxide to the external source of iron. As part of this process we have developed the adjoint of the MIT ocean biogeochemistry model which has enabled us to perform rigorous and efficient sensitivity studies.

Marshall, John; Follows, MIchael

2006-11-06T23:59:59.000Z

452

D-Cycle - 4-Differential -Stroke Cycle | Department of Energy  

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

-Stroke Cycle The D-Cycle offers the opportunity to use less fuel and gain more power while being able to be retrofit to an OEM and aftermarket engines deer09conti.pdf...

453

FutureGen Industrial Alliance Announces Carbon Storage Site Selection...  

Energy Savers [EERE]

making Illinois an international leader in developing the latest in cutting-edge, clean coal technology," Illinois Governor Pat Quinn said. "This is an exciting opportunity for...

454

Hydrogen storage using carbon adsorbents: past, present and future  

Science Journals Connector (OSTI)

Interest in hydrogen as a fuel has grown dramatically since 1990, and many advances in hydrogen production and utilization technologies have been made. However, hydrogen storage technologies must be significantly...

A.C. Dillon; M.J. Heben

2001-02-01T23:59:59.000Z

455

On the Stochastic Properties of Carbon Futures Prices Julien Chevallier  

E-Print Network [OSTI]

, in the wider context of the European Union Emissions Trading Scheme (EU ETS) and the price formation

456

NETL: News Release - DOE Estimates Future Water Needs for Thermoelectric  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

December 6, 2007 December 6, 2007 DOE Estimates Future Water Needs for Thermoelectric Power Plants 2007 Analysis Adds Projected Water Requirements for Carbon Capture WASHINGTON, DC - The Office of Fossil Energy's National Energy Technology Laboratory (NETL) has released a 2007 update to its groundbreaking study, Estimating Freshwater Needs to Meet Future Thermoelectric Generation Requirements. The updated analysis increases understanding of regional and national water needs and usage in the power industry, and provides input for research and development aimed at water-use reduction. MORE INFO Link to the updated study NETL's Water-Energy Interface web page New in this year's report is a response to heightened concerns over atmospheric carbon dioxide. The report examines the possibility that future

457

Fuel Cycle Subcommittee  

Broader source: Energy.gov (indexed) [DOE]

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

458

CANDU fuel cycle flexibility  

SciTech Connect (OSTI)

High neutron economy, on-power refuelling, and a simple bundle design provide a high degree of flexibility that enables CANDU (CANada Deuterium Uranium; registered trademark) reactors to be fuelled with a wide variety of fuel types. Near-term applications include the use of slightly enriched uranium (SEU), and recovered uranium (RU) from reprocessed spent Light Water Reactor (LWR) fuel. Plutonium and other actinides arising from various sources, including spent LWR fuel, can be accommodated, and weapons-origin plutonium could be destroyed by burning in CANDU. In the DUPIC fuel cycle, a dry processing method would convert spent Pressurized Water Reactor (PWR) fuel to CANDU fuel. The thorium cycle remains of strategic interest in CANDU to ensure long-term resource availability, and would be of specific interest to those countries possessing large thorium reserves, but limited uranium resources.

Torgerson, D.F.; Boczar, P.G. [Chalk River Lab., Ontario (Canada); Dastur, A.R. [AECL CANDU, Mississauga, Ontario (Canada)

1994-12-31T23:59:59.000Z

459

USCEA fuel cycle '93  

SciTech Connect (OSTI)

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

460

Delayed carbon sequestration and rising carbon prices  

Science Journals Connector (OSTI)

We set out a dynamic model to investigate optimal time paths of emissions, carbon stocks and carbon sequestration by land conversion, allowing for non-instantaneous carbon sequestration. Previous research in a dy...

Alejandro Caparrs

2009-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "future carbon 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

Carbon sequestration in peatland: patterns and mechanisms of response to climate change  

E-Print Network [OSTI]

Carbon sequestration in peatland: patterns and mechanisms of response to climate change L I S A R., 2000; Turunen et al., 2002; Kremenetski et al., 2003). Rates of carbon (C) sequestration (i.e., uptake in the climatic water budget is crucial to predicting potential feedbacks on the global carbon (C) cycle. To gain

462

Oxygen production and carbon sequestration in an upwelling coastal Burke Hales,1  

E-Print Network [OSTI]

Oxygen production and carbon sequestration in an upwelling coastal margin Burke Hales,1 Lee Karp), Oxygen production and carbon sequestration in an upwelling coastal margin, Global Biogeochem. Cycles, 20 of particulate organic carbon (POC) and dissolved O2 during the upwelling season off the Oregon coast. Oxygen

Pierce, Stephen

463

Modeling impacts of carbon sequestration on net greenhouse gas emissions from agricultural soils in China  

E-Print Network [OSTI]

Modeling impacts of carbon sequestration on net greenhouse gas emissions from agricultural soils impacts of carbon sequestration on net greenhouse gas emissions from agricultural soils in China, Global Biogeochem. Cycles, 23, GB1007, doi:10.1029/2008GB003180. 1. Introduction [2] Carbon (C) sequestration has

464

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

E-Print Network [OSTI]

ECONOMIC MODELING OF THE GLOBAL ADOPTION OF CARBON CAPTURE AND SEQUESTRATION TECHNOLOGIES J. R. Mc of carbon capture and sequestration technologies as applied to electric generating plants. The MIT Emissions, is used to model carbon capture and sequestration (CCS) technologies based on a natural gas combined cycle

465

Competitiveness of Soil Carbon as an Option: Is it a Bridge to the  

E-Print Network [OSTI]

on life-cycle comparisons #12;6 GHG activities in FASOMGHG activities in FASOMGHG activities in FASOM Multiple GHG strategy setup Detailed GHG emission accounting Forest carbon Soil carbon N20 CH4 Fuel use carbon emissions National GHG balance GWP weighted sum of all GHG accounts GHG policy implementation #12

McCarl, Bruce A.

466

8. Discussion This thesis has quantified the ecosystem carbon stocks of the Nhambita  

E-Print Network [OSTI]

destructive to woody biomass: aboveground carbon stocks can only be330 maintained under high intensity fires200 8. Discussion This thesis has quantified the ecosystem carbon stocks of the Nhambita area findings of this thesis and discuss some of the implications for 1) modelling the carbon cycle of miombo

467

Seoul National University http://bp.snu.ac.kr The Role of Carbon Incorporation in  

E-Print Network [OSTI]

O2 · Hydrothermal followed by carbonization at 500°C J. Phys. Chem. C 113, 20504 (2009). J. PhysSeoul National University http://bp.snu.ac.kr The Role of Carbon Incorporation in SnO2 of cracks during cycling Sn-Based Oxide Li Metal Carbon-Coated SnO2 #12;Seoul National University http

Park, Byungwoo

468

Uncertainty of ConcentrationTerrestrial Carbon Feedback in Earth System Models  

Science Journals Connector (OSTI)

Carbon uptake by land and ocean as a biogeochemical response to increasing atmospheric CO2 concentration is called concentrationcarbon feedback and is one of the carbon cycle feedbacks of the global climate. This feedback can have a major impact ...

Tomohiro Hajima; Kaoru Tachiiri; Akihiko Ito; Michio Kawamiya

2014-05-01T23:59:59.000Z

469

Wildland fire emissions, carbon, and climate: Science overview and knowledge needs  

E-Print Network [OSTI]

Wildland fire emissions, carbon, and climate: Science overview and knowledge needs William T: Available online 6 January 2014 Keywords: Wildland fire Climate Forests Carbon cycle Emissions a b s t r a c climate change and the principal emissions component of wildland fires, while black carbon and other

470

Soil organic carbon enrichment of dust emissions: magnitude, mechanisms and its implications for  

E-Print Network [OSTI]

Soil organic carbon enrichment of dust emissions: magnitude, mechanisms and its implications of SOC enrichment in dust emissions is necessary to evaluate the impact of wind erosion on the carbon) across landscapes and soil carbon emissions (van Oost et al., 2007). The dust cycle rep- resents

471

Atmospheric chemistry impacts and feedbacks on the global carbon cycle  

E-Print Network [OSTI]

prediction. Issues to be addressed include the quantification of the impact of the atmospheric oxidation and the oxidative state of the atmosphere. The end goal is to create a model that can quantitatively predict is required to: Predict 3-D atmospheric CO2 production as a function of the CCSM3 atmospheric chemistry module

472

Warm ocean processes and carbon cycling in the Eocene  

Science Journals Connector (OSTI)

...of the marine biological pump has also been emphasized...cloud formation, latent heat transfer to the atmosphere...affected the biological pump, that is, the biologically...Observational evidence for an ocean heat pump induced by tropical cyclones...

2013-01-01T23:59:59.000Z

473

The carbon cycle and associated redox processes through time  

Science Journals Connector (OSTI)

...receives new CO2 from the mantle, relentless supplies of solar energy and nutrients leached from deposits that have retained...intermediate magmatism in west-central (105-99W) Mexico. Contrib. Mineral. Petrol. 143, 641-663. Catling...

2006-01-01T23:59:59.000Z

474

Dynamics of decadally cycling carbon in subsurface soils  

E-Print Network [OSTI]

dynamics in a California conifer forest, Soil Sci. Soc. Am.in a range of temperate conifer forest soils, Global Change

Koarashi, Jun; Hockaday, William C; Masiello, Caroline A; Trumbore, Susan E

2012-01-01T23:59:59.000Z

475

The carbon cycle and associated redox processes through time  

Science Journals Connector (OSTI)

...Oceanography, Woods Hole Oceanographic Institution, and Massachusetts Institute of Technology, Cambridge, MA 02139, USA Earth's...receives new CO2 from the mantle, relentless supplies of solar energy and nutrients leached from deposits that have retained...

2006-01-01T23:59:59.000Z

476

Altered Belowground Carbon Cycling Following Land-Use Change  

E-Print Network [OSTI]

, University of Illinois, Urbana, Illinois, USA; 2 Energy Bioscience Institute, University of Illinois, Urbana, Illinois, USA; 3 Department of Plant Biology, University of Illinois, Urbana, Illinois, USA; 4 Photosynthesis Research Unit, US Department of Agriculture, University of Illinois, Urbana, Illinois, USA; 5

DeLucia, Evan H.

477

Terrestrial nitrogencarbon cycle interactions at the global scale  

Science Journals Connector (OSTI)

...N. Depending on whether the radiative forcing in Earth system models is prescribed (RCP-type forcing) or calculated...accounted for interactively in the next generation of Earth system models designed for long-term studies of biogeochemical-climate...

2013-01-01T23:59:59.000Z

478

Belowground Carbon Cycling Processes at the Molecular Scale  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

time-step models to full representations of the land-surface integrated within Earth system models capable of representing complex feedbacks resulting from climate, land-use...

479

Towards a quantitative understanding of the late Neoproterozoic carbon cycle  

Science Journals Connector (OSTI)

...Amsterdam ), 1st Ed , p 604 . 48 Lenton TM Watson AJ ( 2004 ) Biotic enhancement of weathering...d 1M1 dt w;IC Fw;IC 1 1 IC Fbc 2j21;1 CO2;DOCj21;4-1 p DIC-CO22...ZZQQhy198. 5 Goldblatt C, Lenton TM, Watson AJ (2006) Bistability of atmospheric...

Christian J. Bjerrum; Donald E. Canfield

2011-01-01T23:59:59.000Z

480

Evolution of hydrological and carbon cycles under a changing climate  

E-Print Network [OSTI]

information from climate records, flux measurements at eddy flux towers, and observations from satellites that amount (Trenberth et al., 2007). The World Meteorological Organization, National Oceanic and Atmospheric Administration, and National Aeronautics and Space Administration all reported that 2000­2009 was the warmest

Montana, University of

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481

Thermodynamic Analysis of Syngas Production via the Solar Thermochemical Cerium Oxide Redox Cycle with Methane-Driven Reduction  

Science Journals Connector (OSTI)

Thermodynamic Analysis of Syngas Production via the Solar Thermochemical Cerium Oxide Redox Cycle with Methane-Driven Reduction ... Of particular interest is the storage of solar energy in chemical bonds via the splitting of water and carbon dioxide to produce hydrogen and carbon monoxide, referred to collectively as syngas. ... The coupled cycle produces high-quality syngas by the partial oxidation of methane in the ceria reduction step in addition to the carbon monoxide and hydrogen produced by splitting carbon dioxide and water in the oxidation step. ...

Peter T. Krenzke; Jane H. Davidson

2014-05-16T23:59:59.000Z

482

Solid looping cycles: A new technology for coal conversion  

SciTech Connect (OSTI)

This article examines both oxygen looping cycles (otherwise known as chemical looping combustion), and lime-based CO{sub 2} looping cycles, where calcined limestone is used for in situ CO{sub 2} capture. There has been a rapid rise in the amount of research carried out recently, and both technologies are likely to see practical application in the near future. However, these technologies urgently require demonstration at the large pilot-plant level - in the case of chemical looping cycles for use with high-pressure syngas of the type likely to be produced by current coal gasification technologies and in the case of CO{sub 2} looping cycles both for combustion and gasification applications with coal. Both approaches have potential for application in schemes for H{sub 2} production, but these have not been considered here, although such applications will also inevitably follow in the medium to long term.

Anthony, E.J. [CANMET Energy Technology Centre Ottawa, Ottawa, ON (Canada). Natural Resources Canada

2008-03-19T23:59:59.000Z

483

FUTURES with Jaime Escalante  

SciTech Connect (OSTI)

The United States Department of Energy awarded the Foundation for Advancements in Science and Education (FASE) $826,000 as support to produce the second set of FUTURES segments consisting of 12, 15-minute programs. The programs provide motivation for students to study math by connecting math to the work place and real-life problem scenarios. The programs are broadcast in 50 states through PBS Elementary and Secondary Service (E/SS). The grant term ended on December 16, 1993 and this final report documents program and financial activity results. The 12 episodes are titled: Animal Care, Meteorology, Mass Communication, Advanced Energy, Oceanography, Graphic Design, Future Habitats, Environmental Science & Technology, Fitness & Physical Performance, Interpersonal Communications, Advanced Transportation and Product Design. Each program addresses as many as ten careers or job types within the broader field named. Minority and gender-balanced role models appear throughout the programs.

NONE

1996-08-01T23:59:59.000Z

484

Driving the Future  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

the Future the Future A r g o n n e ' s v e h i c l e s ys t e m s r e s e A r c h 3 2 v e h i c l e s y s t e m s r e s e a r c h At Argonne National Laboratory's Center for Transportation Research, our goal is to accelerate the development and deployment of vehicle technologies that help reduce our nation's petroleum consumption and greenhouse gas emissions. Our Vehicle Systems research focuses on maximizing vehicle performance and efficiency through in-depth studies of the interactions and integration of components and controls in a large, complex vehicle system. Working with the U.S. Department of Energy (DOE) and the automotive industry, we investigate the potential of vehicle technologies ranging from alternative fuels to advanced powertrains, such as plug-in hybrids and electric vehicles. Funding

485

American business cycles and innovation  

E-Print Network [OSTI]

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...

Hood, Michael

2013-02-22T23:59:59.000Z

486

Buildings of the Future  

Broader source: Energy.gov [DOE]

The U.S. Department of Energy (DOE) and the Pacific Northwest National Laboratory are developing a vision for future buildingsat least one hundred years from todaybased on the collective views of thought leaders. As part of this effort, we will explore technology and demographic trends that could revolutionize the built environment across energy, water, environment, resilient design, health, security, and productivity.

487

NETL: News Release - Regional Carbon Sequestration Partnerships Program  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

February 17, 2005 February 17, 2005 Regional Carbon Sequestration Partnerships Program Adds Canadian Provinces Will Develop, Deploy and Validate Carbon Sequestration Options WASHINGTON, DC - The Department of Energy (DOE) today announced that the Provinces of Alberta and British Columbia have joined Saskatchewan and Manitoba as Canadian partners in the Regional Carbon Sequestration Partnerships program, the centerpiece of North American efforts to validate and deploy carbon sequestration technologies. The program, a network of federal and state agencies, as well as private sector entities, will determine the most suitable technologies, regulations, and infrastructure for future carbon capture, storage, and sequestration in different areas of the country. MORE INFO

488

Edinburgh Research Explorer Money Cycles  

E-Print Network [OSTI]

Edinburgh Research Explorer Money Cycles Citation for published version: Clausen, A & Strub, C 2014 'Money Cycles' Edinburgh School of Economics Discussion Paper Series. Link: Link to publication record date: 11. Dec. 2014 #12;Edinburgh School of Economics Discussion Paper Series Number 249 Money Cycles

Millar, Andrew J.

489

HEURISTIC SEARCH FOR HAMILTON CYCLES  

E-Print Network [OSTI]

by combining it with the remaining cycles. The following is the description of the main part of the algorithmHEURISTIC SEARCH FOR HAMILTON CYCLES IN CUBIC GRAPHS Janez ALES, Bojan MOHAR and Tomaz PISANSKI. A successful heuristic algorithm for nding Hamilton cycles in cubic graphs is described. Several graphs from

Mohar, Bojan

490

Carbon Additionality: Discussion Paper  

E-Print Network [OSTI]

ahead, and identifying the carbon pools and other green house gas emissions sources and savings coveredCarbon Additionality: A review Discussion Paper Gregory Valatin November 2009 Forest Research. Voluntary Carbon Standards American Carbon Registry Forest Carbon Project Standard (ACRFCPS) 27 Carbon

491

Nuclear power and the fuel cycle  

Science Journals Connector (OSTI)

Due to rising energy costs and climate concerns, nuclear power is once again being seriously considered as an energy source by several countries. This revival of nuclear power is closely linked with the choice of fuel cycles available, and the intentions of countries pursuing nuclear power are likely to be, correctly or incorrectly, judged by the choice of fuel cycle they make. The needs and constraints of the emerging nuclear powers may, however, be different from the expectations of a segment of the world community. If this potential growth in nuclear power is not to be stifled, it is imperative that a climate of mutual trust is developed respecting every country's right to develop peaceful uses of nuclear power without leading to an atmosphere of mistrust regarding the 'intentions' behind the pursuit of peaceful nuclear power. While it will be a near impossibility to completely decouple the peaceful uses of nuclear power from its more destructive applications, it is important that aspiring countries develop a clear and transparent process. Technology-supplier countries also need to develop and follow clear and consistent treaties and national policies, avoiding ad hoc country-specific arrangements. We review here the state of interest in nuclear power and current policies and discuss fuel cycle options that may pave the way for the future growth of nuclear power.

Rizwan-uddin

2010-01-01T23:59:59.000Z

492

Advanced Technologies in Life Cycle Engineering  

Science Journals Connector (OSTI)

Abstract Increasing competitive pressure within industries producing long-living, cost intensive products drive the need to optimize product life cycles in terms of faster time to market, sustainable operation, reengineering and recycling. In this context, complexity of IT systems is growing and has to connect different life cycle phases. Especially new concepts of Product Service Systems (PSS) lead to a connection between product design, maintenance, repair and overhaul (MRO). There are still many challenges concerning interface problems between different IT-Systems. They are caused by different data formats, continuous demand for information or integration of new technologies. Thus, Life Cycle Engineering (LCE) has gained an important role and needs to consider integration of new industry 4.0 solutions like cloud services, big data or cyber physical systems. This paper gives an overview about these challenges, future development and new research approaches. A deeper view is taken at one promising approach in the field of maintenance of Printed Circuit Boards (PCB). This approach is about invention and implementation of a new process that combines both electrical and optical measuring techniques to automate circuit and layout plan reconstruction of long-living and cost intensive electronic boards.

Rainer Stark; Hendrik Grosser; Boris Beckmann-Dobrev; Simon Kind

2014-01-01T23:59:59.000Z

493

Secretary Chu Announces Agreement on FutureGen Project in Mattoon, Illinois  

Broader source: Energy.gov (indexed) [DOE]

Agreement on FutureGen Project in Mattoon, Agreement on FutureGen Project in Mattoon, Illinois Secretary Chu Announces Agreement on FutureGen Project in Mattoon, Illinois June 12, 2009 - 1:00pm Addthis Washington, DC - U.S. Secretary of Energy Steven Chu today announced an agreement with the FutureGen Alliance that advances the construction of the first commercial scale, fully integrated, carbon capture and sequestration project in the country in Mattoon, Illinois. "This important step forward for FutureGen reflects this Administration's commitment to rapidly developing carbon capture and sequestration technology as part of a comprehensive plan to create jobs, develop clean energy and reduce climate change pollution." said Energy Secretary Steven Chu. "The FutureGen project holds great promise as a flagship facility to

494

Secretary Chu Announces Agreement on FutureGen Project in Mattoon, IL |  

Broader source: Energy.gov (indexed) [DOE]

Agreement on FutureGen Project in Mattoon, Agreement on FutureGen Project in Mattoon, IL Secretary Chu Announces Agreement on FutureGen Project in Mattoon, IL June 12, 2009 - 12:00am Addthis Washington, D.C. - U.S. Secretary of Energy Steven Chu today announced an agreement with the FutureGen Alliance that advances the construction of the first commercial scale, fully integrated, carbon capture and sequestration project in the country in Mattoon, Illinois. "This important step forward for FutureGen reflects this Administration's commitment to rapidly developing carbon capture and sequestration technology as part of a comprehensive plan to create jobs, develop clean energy and reduce climate change pollution." said Energy Secretary Steven Chu. "The FutureGen project holds great promise as a flagship facility to

495

MULTIPARAMETER OPTIMIZATION STUDIES ON GEOTHERMAL ENERGY CYCLES  

E-Print Network [OSTI]

of Practical Cycles for Geothermal Power Plants." GeneralDesign and Optimize Geothermal Power Cycles." Presented atof Practical Cycles for Geothermal Power Plants." General

Pope, W.L.

2011-01-01T23:59:59.000Z

496

THE TRANSPOSED CRITICAL TEMPERATURE RANKINE THERMODYNAMIC CYCLE  

E-Print Network [OSTI]

Process Program for Geothermal Power Plant Cycles,'*for a Rankine Cycle Geothermal Power Plant," Proceedings,Design and Optimize Geothermal Power Cycles," presented at

Pope, William L.

2012-01-01T23:59:59.000Z

497

n-step cycle inequalities - Optimization Online  

E-Print Network [OSTI]

also introduced the so-called cycle inequalities (called 1-step cycle inequalities in this ...... combination of the cycle detection strategy of Tarjan [16] and the...

2014-07-02T23:59:59.000Z

498

Life-cycle Assessment of Semiconductors  

E-Print Network [OSTI]

life-cycle energy requirements (e total ) and global warmingtotal life-cycle global warming impacts. Chapter 3 Life-cycle Energy and Global

Boyd, Sarah B.

2009-01-01T23:59:59.000Z

499

NETL: Carbon Storage FAQs  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Where is CO2 storage happening today? Where is CO2 storage happening today? Sleipner Project (Norway) Sleipner Project (Norway) Carbon dioxide (CO2) storage is currently happening across the United States and around the world. Large, commercial-scale projects, like the Sleipner CO2 Storage Site in Norway, the Weyburn-Midale CO2 Project in Canada, and the In Salah project in Algeria, have been injecting CO2 for many years. Each of these projects stores more than 1 million tons of CO2 per year. Large-scale efforts are currently underway in Africa, China, Australia, and Europe, too. These commercial-scale projects are demonstrating that large volumes of CO2 can be safely and permanently stored. Additionally, a multitude of pilot efforts are underway in different parts of the world to determine suitable locations and technologies for future

500

NETL Mineral Carbonation Workshop  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Overview Overview Mineral Carbonation Workshop August 8, 2001 Carl O. Bauer, Associate Laboratory Director Descriptor - include initials, /org#/date We Are: * One of DOE's 15 national laboratories * Government owned and operated * Sites in Oklahoma, Pennsylvania, and West Virginia * Over 1,100 federal and support contractor employees * FY01 budget of $774 million July 2001 Descriptor - include initials, /org#/date Sites in Pennsylvania, West Virginia, Oklahoma Morgantown, WV Pittsburgh, PA Tulsa, OK Descriptor - include initials, /org#/date Our Mission * Resolve the environmental, supply, and reliability constraints of producing and using fossil resources to provide Americans with a stronger economy, healthier environment, and more secure future * Support development and deployment of environmental technologies that reduce